Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/net/core/Makefile b/net/core/Makefile
new file mode 100644
index 0000000..81f0324
--- /dev/null
+++ b/net/core/Makefile
@@ -0,0 +1,17 @@
+#
+# Makefile for the Linux networking core.
+#
+
+obj-y := sock.o skbuff.o iovec.o datagram.o stream.o scm.o gen_stats.o gen_estimator.o
+
+obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
+
+obj-y += flow.o dev.o ethtool.o dev_mcast.o dst.o \
+ neighbour.o rtnetlink.o utils.o link_watch.o filter.o
+
+obj-$(CONFIG_SYSFS) += net-sysfs.o
+obj-$(CONFIG_NETFILTER) += netfilter.o
+obj-$(CONFIG_NET_DIVERT) += dv.o
+obj-$(CONFIG_NET_PKTGEN) += pktgen.o
+obj-$(CONFIG_NET_RADIO) += wireless.o
+obj-$(CONFIG_NETPOLL) += netpoll.o
diff --git a/net/core/datagram.c b/net/core/datagram.c
new file mode 100644
index 0000000..d1bfd27
--- /dev/null
+++ b/net/core/datagram.c
@@ -0,0 +1,482 @@
+/*
+ * SUCS NET3:
+ *
+ * Generic datagram handling routines. These are generic for all
+ * protocols. Possibly a generic IP version on top of these would
+ * make sense. Not tonight however 8-).
+ * This is used because UDP, RAW, PACKET, DDP, IPX, AX.25 and
+ * NetROM layer all have identical poll code and mostly
+ * identical recvmsg() code. So we share it here. The poll was
+ * shared before but buried in udp.c so I moved it.
+ *
+ * Authors: Alan Cox <alan@redhat.com>. (datagram_poll() from old
+ * udp.c code)
+ *
+ * Fixes:
+ * Alan Cox : NULL return from skb_peek_copy()
+ * understood
+ * Alan Cox : Rewrote skb_read_datagram to avoid the
+ * skb_peek_copy stuff.
+ * Alan Cox : Added support for SOCK_SEQPACKET.
+ * IPX can no longer use the SO_TYPE hack
+ * but AX.25 now works right, and SPX is
+ * feasible.
+ * Alan Cox : Fixed write poll of non IP protocol
+ * crash.
+ * Florian La Roche: Changed for my new skbuff handling.
+ * Darryl Miles : Fixed non-blocking SOCK_SEQPACKET.
+ * Linus Torvalds : BSD semantic fixes.
+ * Alan Cox : Datagram iovec handling
+ * Darryl Miles : Fixed non-blocking SOCK_STREAM.
+ * Alan Cox : POSIXisms
+ * Pete Wyckoff : Unconnected accept() fix.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/inet.h>
+#include <linux/tcp.h>
+#include <linux/netdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/poll.h>
+#include <linux/highmem.h>
+
+#include <net/protocol.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/checksum.h>
+
+
+/*
+ * Is a socket 'connection oriented' ?
+ */
+static inline int connection_based(struct sock *sk)
+{
+ return sk->sk_type == SOCK_SEQPACKET || sk->sk_type == SOCK_STREAM;
+}
+
+/*
+ * Wait for a packet..
+ */
+static int wait_for_packet(struct sock *sk, int *err, long *timeo_p)
+{
+ int error;
+ DEFINE_WAIT(wait);
+
+ prepare_to_wait_exclusive(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+
+ /* Socket errors? */
+ error = sock_error(sk);
+ if (error)
+ goto out_err;
+
+ if (!skb_queue_empty(&sk->sk_receive_queue))
+ goto out;
+
+ /* Socket shut down? */
+ if (sk->sk_shutdown & RCV_SHUTDOWN)
+ goto out_noerr;
+
+ /* Sequenced packets can come disconnected.
+ * If so we report the problem
+ */
+ error = -ENOTCONN;
+ if (connection_based(sk) &&
+ !(sk->sk_state == TCP_ESTABLISHED || sk->sk_state == TCP_LISTEN))
+ goto out_err;
+
+ /* handle signals */
+ if (signal_pending(current))
+ goto interrupted;
+
+ error = 0;
+ *timeo_p = schedule_timeout(*timeo_p);
+out:
+ finish_wait(sk->sk_sleep, &wait);
+ return error;
+interrupted:
+ error = sock_intr_errno(*timeo_p);
+out_err:
+ *err = error;
+ goto out;
+out_noerr:
+ *err = 0;
+ error = 1;
+ goto out;
+}
+
+/**
+ * skb_recv_datagram - Receive a datagram skbuff
+ * @sk - socket
+ * @flags - MSG_ flags
+ * @noblock - blocking operation?
+ * @err - error code returned
+ *
+ * Get a datagram skbuff, understands the peeking, nonblocking wakeups
+ * and possible races. This replaces identical code in packet, raw and
+ * udp, as well as the IPX AX.25 and Appletalk. It also finally fixes
+ * the long standing peek and read race for datagram sockets. If you
+ * alter this routine remember it must be re-entrant.
+ *
+ * This function will lock the socket if a skb is returned, so the caller
+ * needs to unlock the socket in that case (usually by calling
+ * skb_free_datagram)
+ *
+ * * It does not lock socket since today. This function is
+ * * free of race conditions. This measure should/can improve
+ * * significantly datagram socket latencies at high loads,
+ * * when data copying to user space takes lots of time.
+ * * (BTW I've just killed the last cli() in IP/IPv6/core/netlink/packet
+ * * 8) Great win.)
+ * * --ANK (980729)
+ *
+ * The order of the tests when we find no data waiting are specified
+ * quite explicitly by POSIX 1003.1g, don't change them without having
+ * the standard around please.
+ */
+struct sk_buff *skb_recv_datagram(struct sock *sk, unsigned flags,
+ int noblock, int *err)
+{
+ struct sk_buff *skb;
+ long timeo;
+ /*
+ * Caller is allowed not to check sk->sk_err before skb_recv_datagram()
+ */
+ int error = sock_error(sk);
+
+ if (error)
+ goto no_packet;
+
+ timeo = sock_rcvtimeo(sk, noblock);
+
+ do {
+ /* Again only user level code calls this function, so nothing
+ * interrupt level will suddenly eat the receive_queue.
+ *
+ * Look at current nfs client by the way...
+ * However, this function was corrent in any case. 8)
+ */
+ if (flags & MSG_PEEK) {
+ unsigned long cpu_flags;
+
+ spin_lock_irqsave(&sk->sk_receive_queue.lock,
+ cpu_flags);
+ skb = skb_peek(&sk->sk_receive_queue);
+ if (skb)
+ atomic_inc(&skb->users);
+ spin_unlock_irqrestore(&sk->sk_receive_queue.lock,
+ cpu_flags);
+ } else
+ skb = skb_dequeue(&sk->sk_receive_queue);
+
+ if (skb)
+ return skb;
+
+ /* User doesn't want to wait */
+ error = -EAGAIN;
+ if (!timeo)
+ goto no_packet;
+
+ } while (!wait_for_packet(sk, err, &timeo));
+
+ return NULL;
+
+no_packet:
+ *err = error;
+ return NULL;
+}
+
+void skb_free_datagram(struct sock *sk, struct sk_buff *skb)
+{
+ kfree_skb(skb);
+}
+
+/**
+ * skb_copy_datagram_iovec - Copy a datagram to an iovec.
+ * @skb - buffer to copy
+ * @offset - offset in the buffer to start copying from
+ * @iovec - io vector to copy to
+ * @len - amount of data to copy from buffer to iovec
+ *
+ * Note: the iovec is modified during the copy.
+ */
+int skb_copy_datagram_iovec(const struct sk_buff *skb, int offset,
+ struct iovec *to, int len)
+{
+ int start = skb_headlen(skb);
+ int i, copy = start - offset;
+
+ /* Copy header. */
+ if (copy > 0) {
+ if (copy > len)
+ copy = len;
+ if (memcpy_toiovec(to, skb->data + offset, copy))
+ goto fault;
+ if ((len -= copy) == 0)
+ return 0;
+ offset += copy;
+ }
+
+ /* Copy paged appendix. Hmm... why does this look so complicated? */
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + skb_shinfo(skb)->frags[i].size;
+ if ((copy = end - offset) > 0) {
+ int err;
+ u8 *vaddr;
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ struct page *page = frag->page;
+
+ if (copy > len)
+ copy = len;
+ vaddr = kmap(page);
+ err = memcpy_toiovec(to, vaddr + frag->page_offset +
+ offset - start, copy);
+ kunmap(page);
+ if (err)
+ goto fault;
+ if (!(len -= copy))
+ return 0;
+ offset += copy;
+ }
+ start = end;
+ }
+
+ if (skb_shinfo(skb)->frag_list) {
+ struct sk_buff *list = skb_shinfo(skb)->frag_list;
+
+ for (; list; list = list->next) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + list->len;
+ if ((copy = end - offset) > 0) {
+ if (copy > len)
+ copy = len;
+ if (skb_copy_datagram_iovec(list,
+ offset - start,
+ to, copy))
+ goto fault;
+ if ((len -= copy) == 0)
+ return 0;
+ offset += copy;
+ }
+ start = end;
+ }
+ }
+ if (!len)
+ return 0;
+
+fault:
+ return -EFAULT;
+}
+
+static int skb_copy_and_csum_datagram(const struct sk_buff *skb, int offset,
+ u8 __user *to, int len,
+ unsigned int *csump)
+{
+ int start = skb_headlen(skb);
+ int pos = 0;
+ int i, copy = start - offset;
+
+ /* Copy header. */
+ if (copy > 0) {
+ int err = 0;
+ if (copy > len)
+ copy = len;
+ *csump = csum_and_copy_to_user(skb->data + offset, to, copy,
+ *csump, &err);
+ if (err)
+ goto fault;
+ if ((len -= copy) == 0)
+ return 0;
+ offset += copy;
+ to += copy;
+ pos = copy;
+ }
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + skb_shinfo(skb)->frags[i].size;
+ if ((copy = end - offset) > 0) {
+ unsigned int csum2;
+ int err = 0;
+ u8 *vaddr;
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+ struct page *page = frag->page;
+
+ if (copy > len)
+ copy = len;
+ vaddr = kmap(page);
+ csum2 = csum_and_copy_to_user(vaddr +
+ frag->page_offset +
+ offset - start,
+ to, copy, 0, &err);
+ kunmap(page);
+ if (err)
+ goto fault;
+ *csump = csum_block_add(*csump, csum2, pos);
+ if (!(len -= copy))
+ return 0;
+ offset += copy;
+ to += copy;
+ pos += copy;
+ }
+ start = end;
+ }
+
+ if (skb_shinfo(skb)->frag_list) {
+ struct sk_buff *list = skb_shinfo(skb)->frag_list;
+
+ for (; list; list=list->next) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + list->len;
+ if ((copy = end - offset) > 0) {
+ unsigned int csum2 = 0;
+ if (copy > len)
+ copy = len;
+ if (skb_copy_and_csum_datagram(list,
+ offset - start,
+ to, copy,
+ &csum2))
+ goto fault;
+ *csump = csum_block_add(*csump, csum2, pos);
+ if ((len -= copy) == 0)
+ return 0;
+ offset += copy;
+ to += copy;
+ pos += copy;
+ }
+ start = end;
+ }
+ }
+ if (!len)
+ return 0;
+
+fault:
+ return -EFAULT;
+}
+
+/**
+ * skb_copy_and_csum_datagram_iovec - Copy and checkum skb to user iovec.
+ * @skb - skbuff
+ * @hlen - hardware length
+ * @iovec - io vector
+ *
+ * Caller _must_ check that skb will fit to this iovec.
+ *
+ * Returns: 0 - success.
+ * -EINVAL - checksum failure.
+ * -EFAULT - fault during copy. Beware, in this case iovec
+ * can be modified!
+ */
+int skb_copy_and_csum_datagram_iovec(const struct sk_buff *skb,
+ int hlen, struct iovec *iov)
+{
+ unsigned int csum;
+ int chunk = skb->len - hlen;
+
+ /* Skip filled elements.
+ * Pretty silly, look at memcpy_toiovec, though 8)
+ */
+ while (!iov->iov_len)
+ iov++;
+
+ if (iov->iov_len < chunk) {
+ if ((unsigned short)csum_fold(skb_checksum(skb, 0, chunk + hlen,
+ skb->csum)))
+ goto csum_error;
+ if (skb_copy_datagram_iovec(skb, hlen, iov, chunk))
+ goto fault;
+ } else {
+ csum = csum_partial(skb->data, hlen, skb->csum);
+ if (skb_copy_and_csum_datagram(skb, hlen, iov->iov_base,
+ chunk, &csum))
+ goto fault;
+ if ((unsigned short)csum_fold(csum))
+ goto csum_error;
+ iov->iov_len -= chunk;
+ iov->iov_base += chunk;
+ }
+ return 0;
+csum_error:
+ return -EINVAL;
+fault:
+ return -EFAULT;
+}
+
+/**
+ * datagram_poll - generic datagram poll
+ * @file - file struct
+ * @sock - socket
+ * @wait - poll table
+ *
+ * Datagram poll: Again totally generic. This also handles
+ * sequenced packet sockets providing the socket receive queue
+ * is only ever holding data ready to receive.
+ *
+ * Note: when you _don't_ use this routine for this protocol,
+ * and you use a different write policy from sock_writeable()
+ * then please supply your own write_space callback.
+ */
+unsigned int datagram_poll(struct file *file, struct socket *sock,
+ poll_table *wait)
+{
+ struct sock *sk = sock->sk;
+ unsigned int mask;
+
+ poll_wait(file, sk->sk_sleep, wait);
+ mask = 0;
+
+ /* exceptional events? */
+ if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue))
+ mask |= POLLERR;
+ if (sk->sk_shutdown == SHUTDOWN_MASK)
+ mask |= POLLHUP;
+
+ /* readable? */
+ if (!skb_queue_empty(&sk->sk_receive_queue) ||
+ (sk->sk_shutdown & RCV_SHUTDOWN))
+ mask |= POLLIN | POLLRDNORM;
+
+ /* Connection-based need to check for termination and startup */
+ if (connection_based(sk)) {
+ if (sk->sk_state == TCP_CLOSE)
+ mask |= POLLHUP;
+ /* connection hasn't started yet? */
+ if (sk->sk_state == TCP_SYN_SENT)
+ return mask;
+ }
+
+ /* writable? */
+ if (sock_writeable(sk))
+ mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
+ else
+ set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
+
+ return mask;
+}
+
+EXPORT_SYMBOL(datagram_poll);
+EXPORT_SYMBOL(skb_copy_and_csum_datagram_iovec);
+EXPORT_SYMBOL(skb_copy_datagram_iovec);
+EXPORT_SYMBOL(skb_free_datagram);
+EXPORT_SYMBOL(skb_recv_datagram);
diff --git a/net/core/dev.c b/net/core/dev.c
new file mode 100644
index 0000000..42344d9
--- /dev/null
+++ b/net/core/dev.c
@@ -0,0 +1,3359 @@
+/*
+ * NET3 Protocol independent device support routines.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Derived from the non IP parts of dev.c 1.0.19
+ * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Mark Evans, <evansmp@uhura.aston.ac.uk>
+ *
+ * Additional Authors:
+ * Florian la Roche <rzsfl@rz.uni-sb.de>
+ * Alan Cox <gw4pts@gw4pts.ampr.org>
+ * David Hinds <dahinds@users.sourceforge.net>
+ * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ * Adam Sulmicki <adam@cfar.umd.edu>
+ * Pekka Riikonen <priikone@poesidon.pspt.fi>
+ *
+ * Changes:
+ * D.J. Barrow : Fixed bug where dev->refcnt gets set
+ * to 2 if register_netdev gets called
+ * before net_dev_init & also removed a
+ * few lines of code in the process.
+ * Alan Cox : device private ioctl copies fields back.
+ * Alan Cox : Transmit queue code does relevant
+ * stunts to keep the queue safe.
+ * Alan Cox : Fixed double lock.
+ * Alan Cox : Fixed promisc NULL pointer trap
+ * ???????? : Support the full private ioctl range
+ * Alan Cox : Moved ioctl permission check into
+ * drivers
+ * Tim Kordas : SIOCADDMULTI/SIOCDELMULTI
+ * Alan Cox : 100 backlog just doesn't cut it when
+ * you start doing multicast video 8)
+ * Alan Cox : Rewrote net_bh and list manager.
+ * Alan Cox : Fix ETH_P_ALL echoback lengths.
+ * Alan Cox : Took out transmit every packet pass
+ * Saved a few bytes in the ioctl handler
+ * Alan Cox : Network driver sets packet type before
+ * calling netif_rx. Saves a function
+ * call a packet.
+ * Alan Cox : Hashed net_bh()
+ * Richard Kooijman: Timestamp fixes.
+ * Alan Cox : Wrong field in SIOCGIFDSTADDR
+ * Alan Cox : Device lock protection.
+ * Alan Cox : Fixed nasty side effect of device close
+ * changes.
+ * Rudi Cilibrasi : Pass the right thing to
+ * set_mac_address()
+ * Dave Miller : 32bit quantity for the device lock to
+ * make it work out on a Sparc.
+ * Bjorn Ekwall : Added KERNELD hack.
+ * Alan Cox : Cleaned up the backlog initialise.
+ * Craig Metz : SIOCGIFCONF fix if space for under
+ * 1 device.
+ * Thomas Bogendoerfer : Return ENODEV for dev_open, if there
+ * is no device open function.
+ * Andi Kleen : Fix error reporting for SIOCGIFCONF
+ * Michael Chastain : Fix signed/unsigned for SIOCGIFCONF
+ * Cyrus Durgin : Cleaned for KMOD
+ * Adam Sulmicki : Bug Fix : Network Device Unload
+ * A network device unload needs to purge
+ * the backlog queue.
+ * Paul Rusty Russell : SIOCSIFNAME
+ * Pekka Riikonen : Netdev boot-time settings code
+ * Andrew Morton : Make unregister_netdevice wait
+ * indefinitely on dev->refcnt
+ * J Hadi Salim : - Backlog queue sampling
+ * - netif_rx() feedback
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/bitops.h>
+#include <linux/config.h>
+#include <linux/cpu.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/notifier.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/stat.h>
+#include <linux/if_bridge.h>
+#include <linux/divert.h>
+#include <net/dst.h>
+#include <net/pkt_sched.h>
+#include <net/checksum.h>
+#include <linux/highmem.h>
+#include <linux/init.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
+#include <linux/kallsyms.h>
+#include <linux/netpoll.h>
+#include <linux/rcupdate.h>
+#include <linux/delay.h>
+#ifdef CONFIG_NET_RADIO
+#include <linux/wireless.h> /* Note : will define WIRELESS_EXT */
+#include <net/iw_handler.h>
+#endif /* CONFIG_NET_RADIO */
+#include <asm/current.h>
+
+/* This define, if set, will randomly drop a packet when congestion
+ * is more than moderate. It helps fairness in the multi-interface
+ * case when one of them is a hog, but it kills performance for the
+ * single interface case so it is off now by default.
+ */
+#undef RAND_LIE
+
+/* Setting this will sample the queue lengths and thus congestion
+ * via a timer instead of as each packet is received.
+ */
+#undef OFFLINE_SAMPLE
+
+/*
+ * The list of packet types we will receive (as opposed to discard)
+ * and the routines to invoke.
+ *
+ * Why 16. Because with 16 the only overlap we get on a hash of the
+ * low nibble of the protocol value is RARP/SNAP/X.25.
+ *
+ * NOTE: That is no longer true with the addition of VLAN tags. Not
+ * sure which should go first, but I bet it won't make much
+ * difference if we are running VLANs. The good news is that
+ * this protocol won't be in the list unless compiled in, so
+ * the average user (w/out VLANs) will not be adversly affected.
+ * --BLG
+ *
+ * 0800 IP
+ * 8100 802.1Q VLAN
+ * 0001 802.3
+ * 0002 AX.25
+ * 0004 802.2
+ * 8035 RARP
+ * 0005 SNAP
+ * 0805 X.25
+ * 0806 ARP
+ * 8137 IPX
+ * 0009 Localtalk
+ * 86DD IPv6
+ */
+
+static DEFINE_SPINLOCK(ptype_lock);
+static struct list_head ptype_base[16]; /* 16 way hashed list */
+static struct list_head ptype_all; /* Taps */
+
+#ifdef OFFLINE_SAMPLE
+static void sample_queue(unsigned long dummy);
+static struct timer_list samp_timer = TIMER_INITIALIZER(sample_queue, 0, 0);
+#endif
+
+/*
+ * The @dev_base list is protected by @dev_base_lock and the rtln
+ * semaphore.
+ *
+ * Pure readers hold dev_base_lock for reading.
+ *
+ * Writers must hold the rtnl semaphore while they loop through the
+ * dev_base list, and hold dev_base_lock for writing when they do the
+ * actual updates. This allows pure readers to access the list even
+ * while a writer is preparing to update it.
+ *
+ * To put it another way, dev_base_lock is held for writing only to
+ * protect against pure readers; the rtnl semaphore provides the
+ * protection against other writers.
+ *
+ * See, for example usages, register_netdevice() and
+ * unregister_netdevice(), which must be called with the rtnl
+ * semaphore held.
+ */
+struct net_device *dev_base;
+static struct net_device **dev_tail = &dev_base;
+DEFINE_RWLOCK(dev_base_lock);
+
+EXPORT_SYMBOL(dev_base);
+EXPORT_SYMBOL(dev_base_lock);
+
+#define NETDEV_HASHBITS 8
+static struct hlist_head dev_name_head[1<<NETDEV_HASHBITS];
+static struct hlist_head dev_index_head[1<<NETDEV_HASHBITS];
+
+static inline struct hlist_head *dev_name_hash(const char *name)
+{
+ unsigned hash = full_name_hash(name, strnlen(name, IFNAMSIZ));
+ return &dev_name_head[hash & ((1<<NETDEV_HASHBITS)-1)];
+}
+
+static inline struct hlist_head *dev_index_hash(int ifindex)
+{
+ return &dev_index_head[ifindex & ((1<<NETDEV_HASHBITS)-1)];
+}
+
+/*
+ * Our notifier list
+ */
+
+static struct notifier_block *netdev_chain;
+
+/*
+ * Device drivers call our routines to queue packets here. We empty the
+ * queue in the local softnet handler.
+ */
+DEFINE_PER_CPU(struct softnet_data, softnet_data) = { 0, };
+
+#ifdef CONFIG_SYSFS
+extern int netdev_sysfs_init(void);
+extern int netdev_register_sysfs(struct net_device *);
+extern void netdev_unregister_sysfs(struct net_device *);
+#else
+#define netdev_sysfs_init() (0)
+#define netdev_register_sysfs(dev) (0)
+#define netdev_unregister_sysfs(dev) do { } while(0)
+#endif
+
+
+/*******************************************************************************
+
+ Protocol management and registration routines
+
+*******************************************************************************/
+
+/*
+ * For efficiency
+ */
+
+int netdev_nit;
+
+/*
+ * Add a protocol ID to the list. Now that the input handler is
+ * smarter we can dispense with all the messy stuff that used to be
+ * here.
+ *
+ * BEWARE!!! Protocol handlers, mangling input packets,
+ * MUST BE last in hash buckets and checking protocol handlers
+ * MUST start from promiscuous ptype_all chain in net_bh.
+ * It is true now, do not change it.
+ * Explanation follows: if protocol handler, mangling packet, will
+ * be the first on list, it is not able to sense, that packet
+ * is cloned and should be copied-on-write, so that it will
+ * change it and subsequent readers will get broken packet.
+ * --ANK (980803)
+ */
+
+/**
+ * dev_add_pack - add packet handler
+ * @pt: packet type declaration
+ *
+ * Add a protocol handler to the networking stack. The passed &packet_type
+ * is linked into kernel lists and may not be freed until it has been
+ * removed from the kernel lists.
+ *
+ * This call does not sleep therefore it can not
+ * guarantee all CPU's that are in middle of receiving packets
+ * will see the new packet type (until the next received packet).
+ */
+
+void dev_add_pack(struct packet_type *pt)
+{
+ int hash;
+
+ spin_lock_bh(&ptype_lock);
+ if (pt->type == htons(ETH_P_ALL)) {
+ netdev_nit++;
+ list_add_rcu(&pt->list, &ptype_all);
+ } else {
+ hash = ntohs(pt->type) & 15;
+ list_add_rcu(&pt->list, &ptype_base[hash]);
+ }
+ spin_unlock_bh(&ptype_lock);
+}
+
+extern void linkwatch_run_queue(void);
+
+
+
+/**
+ * __dev_remove_pack - remove packet handler
+ * @pt: packet type declaration
+ *
+ * Remove a protocol handler that was previously added to the kernel
+ * protocol handlers by dev_add_pack(). The passed &packet_type is removed
+ * from the kernel lists and can be freed or reused once this function
+ * returns.
+ *
+ * The packet type might still be in use by receivers
+ * and must not be freed until after all the CPU's have gone
+ * through a quiescent state.
+ */
+void __dev_remove_pack(struct packet_type *pt)
+{
+ struct list_head *head;
+ struct packet_type *pt1;
+
+ spin_lock_bh(&ptype_lock);
+
+ if (pt->type == htons(ETH_P_ALL)) {
+ netdev_nit--;
+ head = &ptype_all;
+ } else
+ head = &ptype_base[ntohs(pt->type) & 15];
+
+ list_for_each_entry(pt1, head, list) {
+ if (pt == pt1) {
+ list_del_rcu(&pt->list);
+ goto out;
+ }
+ }
+
+ printk(KERN_WARNING "dev_remove_pack: %p not found.\n", pt);
+out:
+ spin_unlock_bh(&ptype_lock);
+}
+/**
+ * dev_remove_pack - remove packet handler
+ * @pt: packet type declaration
+ *
+ * Remove a protocol handler that was previously added to the kernel
+ * protocol handlers by dev_add_pack(). The passed &packet_type is removed
+ * from the kernel lists and can be freed or reused once this function
+ * returns.
+ *
+ * This call sleeps to guarantee that no CPU is looking at the packet
+ * type after return.
+ */
+void dev_remove_pack(struct packet_type *pt)
+{
+ __dev_remove_pack(pt);
+
+ synchronize_net();
+}
+
+/******************************************************************************
+
+ Device Boot-time Settings Routines
+
+*******************************************************************************/
+
+/* Boot time configuration table */
+static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX];
+
+/**
+ * netdev_boot_setup_add - add new setup entry
+ * @name: name of the device
+ * @map: configured settings for the device
+ *
+ * Adds new setup entry to the dev_boot_setup list. The function
+ * returns 0 on error and 1 on success. This is a generic routine to
+ * all netdevices.
+ */
+static int netdev_boot_setup_add(char *name, struct ifmap *map)
+{
+ struct netdev_boot_setup *s;
+ int i;
+
+ s = dev_boot_setup;
+ for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
+ if (s[i].name[0] == '\0' || s[i].name[0] == ' ') {
+ memset(s[i].name, 0, sizeof(s[i].name));
+ strcpy(s[i].name, name);
+ memcpy(&s[i].map, map, sizeof(s[i].map));
+ break;
+ }
+ }
+
+ return i >= NETDEV_BOOT_SETUP_MAX ? 0 : 1;
+}
+
+/**
+ * netdev_boot_setup_check - check boot time settings
+ * @dev: the netdevice
+ *
+ * Check boot time settings for the device.
+ * The found settings are set for the device to be used
+ * later in the device probing.
+ * Returns 0 if no settings found, 1 if they are.
+ */
+int netdev_boot_setup_check(struct net_device *dev)
+{
+ struct netdev_boot_setup *s = dev_boot_setup;
+ int i;
+
+ for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) {
+ if (s[i].name[0] != '\0' && s[i].name[0] != ' ' &&
+ !strncmp(dev->name, s[i].name, strlen(s[i].name))) {
+ dev->irq = s[i].map.irq;
+ dev->base_addr = s[i].map.base_addr;
+ dev->mem_start = s[i].map.mem_start;
+ dev->mem_end = s[i].map.mem_end;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * netdev_boot_base - get address from boot time settings
+ * @prefix: prefix for network device
+ * @unit: id for network device
+ *
+ * Check boot time settings for the base address of device.
+ * The found settings are set for the device to be used
+ * later in the device probing.
+ * Returns 0 if no settings found.
+ */
+unsigned long netdev_boot_base(const char *prefix, int unit)
+{
+ const struct netdev_boot_setup *s = dev_boot_setup;
+ char name[IFNAMSIZ];
+ int i;
+
+ sprintf(name, "%s%d", prefix, unit);
+
+ /*
+ * If device already registered then return base of 1
+ * to indicate not to probe for this interface
+ */
+ if (__dev_get_by_name(name))
+ return 1;
+
+ for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++)
+ if (!strcmp(name, s[i].name))
+ return s[i].map.base_addr;
+ return 0;
+}
+
+/*
+ * Saves at boot time configured settings for any netdevice.
+ */
+int __init netdev_boot_setup(char *str)
+{
+ int ints[5];
+ struct ifmap map;
+
+ str = get_options(str, ARRAY_SIZE(ints), ints);
+ if (!str || !*str)
+ return 0;
+
+ /* Save settings */
+ memset(&map, 0, sizeof(map));
+ if (ints[0] > 0)
+ map.irq = ints[1];
+ if (ints[0] > 1)
+ map.base_addr = ints[2];
+ if (ints[0] > 2)
+ map.mem_start = ints[3];
+ if (ints[0] > 3)
+ map.mem_end = ints[4];
+
+ /* Add new entry to the list */
+ return netdev_boot_setup_add(str, &map);
+}
+
+__setup("netdev=", netdev_boot_setup);
+
+/*******************************************************************************
+
+ Device Interface Subroutines
+
+*******************************************************************************/
+
+/**
+ * __dev_get_by_name - find a device by its name
+ * @name: name to find
+ *
+ * Find an interface by name. Must be called under RTNL semaphore
+ * or @dev_base_lock. If the name is found a pointer to the device
+ * is returned. If the name is not found then %NULL is returned. The
+ * reference counters are not incremented so the caller must be
+ * careful with locks.
+ */
+
+struct net_device *__dev_get_by_name(const char *name)
+{
+ struct hlist_node *p;
+
+ hlist_for_each(p, dev_name_hash(name)) {
+ struct net_device *dev
+ = hlist_entry(p, struct net_device, name_hlist);
+ if (!strncmp(dev->name, name, IFNAMSIZ))
+ return dev;
+ }
+ return NULL;
+}
+
+/**
+ * dev_get_by_name - find a device by its name
+ * @name: name to find
+ *
+ * Find an interface by name. This can be called from any
+ * context and does its own locking. The returned handle has
+ * the usage count incremented and the caller must use dev_put() to
+ * release it when it is no longer needed. %NULL is returned if no
+ * matching device is found.
+ */
+
+struct net_device *dev_get_by_name(const char *name)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_name(name);
+ if (dev)
+ dev_hold(dev);
+ read_unlock(&dev_base_lock);
+ return dev;
+}
+
+/**
+ * __dev_get_by_index - find a device by its ifindex
+ * @ifindex: index of device
+ *
+ * Search for an interface by index. Returns %NULL if the device
+ * is not found or a pointer to the device. The device has not
+ * had its reference counter increased so the caller must be careful
+ * about locking. The caller must hold either the RTNL semaphore
+ * or @dev_base_lock.
+ */
+
+struct net_device *__dev_get_by_index(int ifindex)
+{
+ struct hlist_node *p;
+
+ hlist_for_each(p, dev_index_hash(ifindex)) {
+ struct net_device *dev
+ = hlist_entry(p, struct net_device, index_hlist);
+ if (dev->ifindex == ifindex)
+ return dev;
+ }
+ return NULL;
+}
+
+
+/**
+ * dev_get_by_index - find a device by its ifindex
+ * @ifindex: index of device
+ *
+ * Search for an interface by index. Returns NULL if the device
+ * is not found or a pointer to the device. The device returned has
+ * had a reference added and the pointer is safe until the user calls
+ * dev_put to indicate they have finished with it.
+ */
+
+struct net_device *dev_get_by_index(int ifindex)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_index(ifindex);
+ if (dev)
+ dev_hold(dev);
+ read_unlock(&dev_base_lock);
+ return dev;
+}
+
+/**
+ * dev_getbyhwaddr - find a device by its hardware address
+ * @type: media type of device
+ * @ha: hardware address
+ *
+ * Search for an interface by MAC address. Returns NULL if the device
+ * is not found or a pointer to the device. The caller must hold the
+ * rtnl semaphore. The returned device has not had its ref count increased
+ * and the caller must therefore be careful about locking
+ *
+ * BUGS:
+ * If the API was consistent this would be __dev_get_by_hwaddr
+ */
+
+struct net_device *dev_getbyhwaddr(unsigned short type, char *ha)
+{
+ struct net_device *dev;
+
+ ASSERT_RTNL();
+
+ for (dev = dev_base; dev; dev = dev->next)
+ if (dev->type == type &&
+ !memcmp(dev->dev_addr, ha, dev->addr_len))
+ break;
+ return dev;
+}
+
+struct net_device *dev_getfirstbyhwtype(unsigned short type)
+{
+ struct net_device *dev;
+
+ rtnl_lock();
+ for (dev = dev_base; dev; dev = dev->next) {
+ if (dev->type == type) {
+ dev_hold(dev);
+ break;
+ }
+ }
+ rtnl_unlock();
+ return dev;
+}
+
+EXPORT_SYMBOL(dev_getfirstbyhwtype);
+
+/**
+ * dev_get_by_flags - find any device with given flags
+ * @if_flags: IFF_* values
+ * @mask: bitmask of bits in if_flags to check
+ *
+ * Search for any interface with the given flags. Returns NULL if a device
+ * is not found or a pointer to the device. The device returned has
+ * had a reference added and the pointer is safe until the user calls
+ * dev_put to indicate they have finished with it.
+ */
+
+struct net_device * dev_get_by_flags(unsigned short if_flags, unsigned short mask)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ for (dev = dev_base; dev != NULL; dev = dev->next) {
+ if (((dev->flags ^ if_flags) & mask) == 0) {
+ dev_hold(dev);
+ break;
+ }
+ }
+ read_unlock(&dev_base_lock);
+ return dev;
+}
+
+/**
+ * dev_valid_name - check if name is okay for network device
+ * @name: name string
+ *
+ * Network device names need to be valid file names to
+ * to allow sysfs to work
+ */
+static int dev_valid_name(const char *name)
+{
+ return !(*name == '\0'
+ || !strcmp(name, ".")
+ || !strcmp(name, "..")
+ || strchr(name, '/'));
+}
+
+/**
+ * dev_alloc_name - allocate a name for a device
+ * @dev: device
+ * @name: name format string
+ *
+ * Passed a format string - eg "lt%d" it will try and find a suitable
+ * id. Not efficient for many devices, not called a lot. The caller
+ * must hold the dev_base or rtnl lock while allocating the name and
+ * adding the device in order to avoid duplicates. Returns the number
+ * of the unit assigned or a negative errno code.
+ */
+
+int dev_alloc_name(struct net_device *dev, const char *name)
+{
+ int i = 0;
+ char buf[IFNAMSIZ];
+ const char *p;
+ const int max_netdevices = 8*PAGE_SIZE;
+ long *inuse;
+ struct net_device *d;
+
+ p = strnchr(name, IFNAMSIZ-1, '%');
+ if (p) {
+ /*
+ * Verify the string as this thing may have come from
+ * the user. There must be either one "%d" and no other "%"
+ * characters.
+ */
+ if (p[1] != 'd' || strchr(p + 2, '%'))
+ return -EINVAL;
+
+ /* Use one page as a bit array of possible slots */
+ inuse = (long *) get_zeroed_page(GFP_ATOMIC);
+ if (!inuse)
+ return -ENOMEM;
+
+ for (d = dev_base; d; d = d->next) {
+ if (!sscanf(d->name, name, &i))
+ continue;
+ if (i < 0 || i >= max_netdevices)
+ continue;
+
+ /* avoid cases where sscanf is not exact inverse of printf */
+ snprintf(buf, sizeof(buf), name, i);
+ if (!strncmp(buf, d->name, IFNAMSIZ))
+ set_bit(i, inuse);
+ }
+
+ i = find_first_zero_bit(inuse, max_netdevices);
+ free_page((unsigned long) inuse);
+ }
+
+ snprintf(buf, sizeof(buf), name, i);
+ if (!__dev_get_by_name(buf)) {
+ strlcpy(dev->name, buf, IFNAMSIZ);
+ return i;
+ }
+
+ /* It is possible to run out of possible slots
+ * when the name is long and there isn't enough space left
+ * for the digits, or if all bits are used.
+ */
+ return -ENFILE;
+}
+
+
+/**
+ * dev_change_name - change name of a device
+ * @dev: device
+ * @newname: name (or format string) must be at least IFNAMSIZ
+ *
+ * Change name of a device, can pass format strings "eth%d".
+ * for wildcarding.
+ */
+int dev_change_name(struct net_device *dev, char *newname)
+{
+ int err = 0;
+
+ ASSERT_RTNL();
+
+ if (dev->flags & IFF_UP)
+ return -EBUSY;
+
+ if (!dev_valid_name(newname))
+ return -EINVAL;
+
+ if (strchr(newname, '%')) {
+ err = dev_alloc_name(dev, newname);
+ if (err < 0)
+ return err;
+ strcpy(newname, dev->name);
+ }
+ else if (__dev_get_by_name(newname))
+ return -EEXIST;
+ else
+ strlcpy(dev->name, newname, IFNAMSIZ);
+
+ err = class_device_rename(&dev->class_dev, dev->name);
+ if (!err) {
+ hlist_del(&dev->name_hlist);
+ hlist_add_head(&dev->name_hlist, dev_name_hash(dev->name));
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev);
+ }
+
+ return err;
+}
+
+/**
+ * netdev_state_change - device changes state
+ * @dev: device to cause notification
+ *
+ * Called to indicate a device has changed state. This function calls
+ * the notifier chains for netdev_chain and sends a NEWLINK message
+ * to the routing socket.
+ */
+void netdev_state_change(struct net_device *dev)
+{
+ if (dev->flags & IFF_UP) {
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
+ rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
+ }
+}
+
+/**
+ * dev_load - load a network module
+ * @name: name of interface
+ *
+ * If a network interface is not present and the process has suitable
+ * privileges this function loads the module. If module loading is not
+ * available in this kernel then it becomes a nop.
+ */
+
+void dev_load(const char *name)
+{
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_name(name);
+ read_unlock(&dev_base_lock);
+
+ if (!dev && capable(CAP_SYS_MODULE))
+ request_module("%s", name);
+}
+
+static int default_rebuild_header(struct sk_buff *skb)
+{
+ printk(KERN_DEBUG "%s: default_rebuild_header called -- BUG!\n",
+ skb->dev ? skb->dev->name : "NULL!!!");
+ kfree_skb(skb);
+ return 1;
+}
+
+
+/**
+ * dev_open - prepare an interface for use.
+ * @dev: device to open
+ *
+ * Takes a device from down to up state. The device's private open
+ * function is invoked and then the multicast lists are loaded. Finally
+ * the device is moved into the up state and a %NETDEV_UP message is
+ * sent to the netdev notifier chain.
+ *
+ * Calling this function on an active interface is a nop. On a failure
+ * a negative errno code is returned.
+ */
+int dev_open(struct net_device *dev)
+{
+ int ret = 0;
+
+ /*
+ * Is it already up?
+ */
+
+ if (dev->flags & IFF_UP)
+ return 0;
+
+ /*
+ * Is it even present?
+ */
+ if (!netif_device_present(dev))
+ return -ENODEV;
+
+ /*
+ * Call device private open method
+ */
+ set_bit(__LINK_STATE_START, &dev->state);
+ if (dev->open) {
+ ret = dev->open(dev);
+ if (ret)
+ clear_bit(__LINK_STATE_START, &dev->state);
+ }
+
+ /*
+ * If it went open OK then:
+ */
+
+ if (!ret) {
+ /*
+ * Set the flags.
+ */
+ dev->flags |= IFF_UP;
+
+ /*
+ * Initialize multicasting status
+ */
+ dev_mc_upload(dev);
+
+ /*
+ * Wakeup transmit queue engine
+ */
+ dev_activate(dev);
+
+ /*
+ * ... and announce new interface.
+ */
+ notifier_call_chain(&netdev_chain, NETDEV_UP, dev);
+ }
+ return ret;
+}
+
+/**
+ * dev_close - shutdown an interface.
+ * @dev: device to shutdown
+ *
+ * This function moves an active device into down state. A
+ * %NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device
+ * is then deactivated and finally a %NETDEV_DOWN is sent to the notifier
+ * chain.
+ */
+int dev_close(struct net_device *dev)
+{
+ if (!(dev->flags & IFF_UP))
+ return 0;
+
+ /*
+ * Tell people we are going down, so that they can
+ * prepare to death, when device is still operating.
+ */
+ notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev);
+
+ dev_deactivate(dev);
+
+ clear_bit(__LINK_STATE_START, &dev->state);
+
+ /* Synchronize to scheduled poll. We cannot touch poll list,
+ * it can be even on different cpu. So just clear netif_running(),
+ * and wait when poll really will happen. Actually, the best place
+ * for this is inside dev->stop() after device stopped its irq
+ * engine, but this requires more changes in devices. */
+
+ smp_mb__after_clear_bit(); /* Commit netif_running(). */
+ while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) {
+ /* No hurry. */
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(1);
+ }
+
+ /*
+ * Call the device specific close. This cannot fail.
+ * Only if device is UP
+ *
+ * We allow it to be called even after a DETACH hot-plug
+ * event.
+ */
+ if (dev->stop)
+ dev->stop(dev);
+
+ /*
+ * Device is now down.
+ */
+
+ dev->flags &= ~IFF_UP;
+
+ /*
+ * Tell people we are down
+ */
+ notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev);
+
+ return 0;
+}
+
+
+/*
+ * Device change register/unregister. These are not inline or static
+ * as we export them to the world.
+ */
+
+/**
+ * register_netdevice_notifier - register a network notifier block
+ * @nb: notifier
+ *
+ * Register a notifier to be called when network device events occur.
+ * The notifier passed is linked into the kernel structures and must
+ * not be reused until it has been unregistered. A negative errno code
+ * is returned on a failure.
+ *
+ * When registered all registration and up events are replayed
+ * to the new notifier to allow device to have a race free
+ * view of the network device list.
+ */
+
+int register_netdevice_notifier(struct notifier_block *nb)
+{
+ struct net_device *dev;
+ int err;
+
+ rtnl_lock();
+ err = notifier_chain_register(&netdev_chain, nb);
+ if (!err) {
+ for (dev = dev_base; dev; dev = dev->next) {
+ nb->notifier_call(nb, NETDEV_REGISTER, dev);
+
+ if (dev->flags & IFF_UP)
+ nb->notifier_call(nb, NETDEV_UP, dev);
+ }
+ }
+ rtnl_unlock();
+ return err;
+}
+
+/**
+ * unregister_netdevice_notifier - unregister a network notifier block
+ * @nb: notifier
+ *
+ * Unregister a notifier previously registered by
+ * register_netdevice_notifier(). The notifier is unlinked into the
+ * kernel structures and may then be reused. A negative errno code
+ * is returned on a failure.
+ */
+
+int unregister_netdevice_notifier(struct notifier_block *nb)
+{
+ return notifier_chain_unregister(&netdev_chain, nb);
+}
+
+/**
+ * call_netdevice_notifiers - call all network notifier blocks
+ * @val: value passed unmodified to notifier function
+ * @v: pointer passed unmodified to notifier function
+ *
+ * Call all network notifier blocks. Parameters and return value
+ * are as for notifier_call_chain().
+ */
+
+int call_netdevice_notifiers(unsigned long val, void *v)
+{
+ return notifier_call_chain(&netdev_chain, val, v);
+}
+
+/* When > 0 there are consumers of rx skb time stamps */
+static atomic_t netstamp_needed = ATOMIC_INIT(0);
+
+void net_enable_timestamp(void)
+{
+ atomic_inc(&netstamp_needed);
+}
+
+void net_disable_timestamp(void)
+{
+ atomic_dec(&netstamp_needed);
+}
+
+static inline void net_timestamp(struct timeval *stamp)
+{
+ if (atomic_read(&netstamp_needed))
+ do_gettimeofday(stamp);
+ else {
+ stamp->tv_sec = 0;
+ stamp->tv_usec = 0;
+ }
+}
+
+/*
+ * Support routine. Sends outgoing frames to any network
+ * taps currently in use.
+ */
+
+void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct packet_type *ptype;
+ net_timestamp(&skb->stamp);
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(ptype, &ptype_all, list) {
+ /* Never send packets back to the socket
+ * they originated from - MvS (miquels@drinkel.ow.org)
+ */
+ if ((ptype->dev == dev || !ptype->dev) &&
+ (ptype->af_packet_priv == NULL ||
+ (struct sock *)ptype->af_packet_priv != skb->sk)) {
+ struct sk_buff *skb2= skb_clone(skb, GFP_ATOMIC);
+ if (!skb2)
+ break;
+
+ /* skb->nh should be correctly
+ set by sender, so that the second statement is
+ just protection against buggy protocols.
+ */
+ skb2->mac.raw = skb2->data;
+
+ if (skb2->nh.raw < skb2->data ||
+ skb2->nh.raw > skb2->tail) {
+ if (net_ratelimit())
+ printk(KERN_CRIT "protocol %04x is "
+ "buggy, dev %s\n",
+ skb2->protocol, dev->name);
+ skb2->nh.raw = skb2->data;
+ }
+
+ skb2->h.raw = skb2->nh.raw;
+ skb2->pkt_type = PACKET_OUTGOING;
+ ptype->func(skb2, skb->dev, ptype);
+ }
+ }
+ rcu_read_unlock();
+}
+
+/*
+ * Invalidate hardware checksum when packet is to be mangled, and
+ * complete checksum manually on outgoing path.
+ */
+int skb_checksum_help(struct sk_buff *skb, int inward)
+{
+ unsigned int csum;
+ int ret = 0, offset = skb->h.raw - skb->data;
+
+ if (inward) {
+ skb->ip_summed = CHECKSUM_NONE;
+ goto out;
+ }
+
+ if (skb_cloned(skb)) {
+ ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+ if (ret)
+ goto out;
+ }
+
+ if (offset > (int)skb->len)
+ BUG();
+ csum = skb_checksum(skb, offset, skb->len-offset, 0);
+
+ offset = skb->tail - skb->h.raw;
+ if (offset <= 0)
+ BUG();
+ if (skb->csum + 2 > offset)
+ BUG();
+
+ *(u16*)(skb->h.raw + skb->csum) = csum_fold(csum);
+ skb->ip_summed = CHECKSUM_NONE;
+out:
+ return ret;
+}
+
+#ifdef CONFIG_HIGHMEM
+/* Actually, we should eliminate this check as soon as we know, that:
+ * 1. IOMMU is present and allows to map all the memory.
+ * 2. No high memory really exists on this machine.
+ */
+
+static inline int illegal_highdma(struct net_device *dev, struct sk_buff *skb)
+{
+ int i;
+
+ if (dev->features & NETIF_F_HIGHDMA)
+ return 0;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+ if (PageHighMem(skb_shinfo(skb)->frags[i].page))
+ return 1;
+
+ return 0;
+}
+#else
+#define illegal_highdma(dev, skb) (0)
+#endif
+
+extern void skb_release_data(struct sk_buff *);
+
+/* Keep head the same: replace data */
+int __skb_linearize(struct sk_buff *skb, int gfp_mask)
+{
+ unsigned int size;
+ u8 *data;
+ long offset;
+ struct skb_shared_info *ninfo;
+ int headerlen = skb->data - skb->head;
+ int expand = (skb->tail + skb->data_len) - skb->end;
+
+ if (skb_shared(skb))
+ BUG();
+
+ if (expand <= 0)
+ expand = 0;
+
+ size = skb->end - skb->head + expand;
+ size = SKB_DATA_ALIGN(size);
+ data = kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);
+ if (!data)
+ return -ENOMEM;
+
+ /* Copy entire thing */
+ if (skb_copy_bits(skb, -headerlen, data, headerlen + skb->len))
+ BUG();
+
+ /* Set up shinfo */
+ ninfo = (struct skb_shared_info*)(data + size);
+ atomic_set(&ninfo->dataref, 1);
+ ninfo->tso_size = skb_shinfo(skb)->tso_size;
+ ninfo->tso_segs = skb_shinfo(skb)->tso_segs;
+ ninfo->nr_frags = 0;
+ ninfo->frag_list = NULL;
+
+ /* Offset between the two in bytes */
+ offset = data - skb->head;
+
+ /* Free old data. */
+ skb_release_data(skb);
+
+ skb->head = data;
+ skb->end = data + size;
+
+ /* Set up new pointers */
+ skb->h.raw += offset;
+ skb->nh.raw += offset;
+ skb->mac.raw += offset;
+ skb->tail += offset;
+ skb->data += offset;
+
+ /* We are no longer a clone, even if we were. */
+ skb->cloned = 0;
+
+ skb->tail += skb->data_len;
+ skb->data_len = 0;
+ return 0;
+}
+
+#define HARD_TX_LOCK(dev, cpu) { \
+ if ((dev->features & NETIF_F_LLTX) == 0) { \
+ spin_lock(&dev->xmit_lock); \
+ dev->xmit_lock_owner = cpu; \
+ } \
+}
+
+#define HARD_TX_UNLOCK(dev) { \
+ if ((dev->features & NETIF_F_LLTX) == 0) { \
+ dev->xmit_lock_owner = -1; \
+ spin_unlock(&dev->xmit_lock); \
+ } \
+}
+
+/**
+ * dev_queue_xmit - transmit a buffer
+ * @skb: buffer to transmit
+ *
+ * Queue a buffer for transmission to a network device. The caller must
+ * have set the device and priority and built the buffer before calling
+ * this function. The function can be called from an interrupt.
+ *
+ * A negative errno code is returned on a failure. A success does not
+ * guarantee the frame will be transmitted as it may be dropped due
+ * to congestion or traffic shaping.
+ */
+
+int dev_queue_xmit(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+ struct Qdisc *q;
+ int rc = -ENOMEM;
+
+ if (skb_shinfo(skb)->frag_list &&
+ !(dev->features & NETIF_F_FRAGLIST) &&
+ __skb_linearize(skb, GFP_ATOMIC))
+ goto out_kfree_skb;
+
+ /* Fragmented skb is linearized if device does not support SG,
+ * or if at least one of fragments is in highmem and device
+ * does not support DMA from it.
+ */
+ if (skb_shinfo(skb)->nr_frags &&
+ (!(dev->features & NETIF_F_SG) || illegal_highdma(dev, skb)) &&
+ __skb_linearize(skb, GFP_ATOMIC))
+ goto out_kfree_skb;
+
+ /* If packet is not checksummed and device does not support
+ * checksumming for this protocol, complete checksumming here.
+ */
+ if (skb->ip_summed == CHECKSUM_HW &&
+ (!(dev->features & (NETIF_F_HW_CSUM | NETIF_F_NO_CSUM)) &&
+ (!(dev->features & NETIF_F_IP_CSUM) ||
+ skb->protocol != htons(ETH_P_IP))))
+ if (skb_checksum_help(skb, 0))
+ goto out_kfree_skb;
+
+ /* Disable soft irqs for various locks below. Also
+ * stops preemption for RCU.
+ */
+ local_bh_disable();
+
+ /* Updates of qdisc are serialized by queue_lock.
+ * The struct Qdisc which is pointed to by qdisc is now a
+ * rcu structure - it may be accessed without acquiring
+ * a lock (but the structure may be stale.) The freeing of the
+ * qdisc will be deferred until it's known that there are no
+ * more references to it.
+ *
+ * If the qdisc has an enqueue function, we still need to
+ * hold the queue_lock before calling it, since queue_lock
+ * also serializes access to the device queue.
+ */
+
+ q = rcu_dereference(dev->qdisc);
+#ifdef CONFIG_NET_CLS_ACT
+ skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_EGRESS);
+#endif
+ if (q->enqueue) {
+ /* Grab device queue */
+ spin_lock(&dev->queue_lock);
+
+ rc = q->enqueue(skb, q);
+
+ qdisc_run(dev);
+
+ spin_unlock(&dev->queue_lock);
+ rc = rc == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : rc;
+ goto out;
+ }
+
+ /* The device has no queue. Common case for software devices:
+ loopback, all the sorts of tunnels...
+
+ Really, it is unlikely that xmit_lock protection is necessary here.
+ (f.e. loopback and IP tunnels are clean ignoring statistics
+ counters.)
+ However, it is possible, that they rely on protection
+ made by us here.
+
+ Check this and shot the lock. It is not prone from deadlocks.
+ Either shot noqueue qdisc, it is even simpler 8)
+ */
+ if (dev->flags & IFF_UP) {
+ int cpu = smp_processor_id(); /* ok because BHs are off */
+
+ if (dev->xmit_lock_owner != cpu) {
+
+ HARD_TX_LOCK(dev, cpu);
+
+ if (!netif_queue_stopped(dev)) {
+ if (netdev_nit)
+ dev_queue_xmit_nit(skb, dev);
+
+ rc = 0;
+ if (!dev->hard_start_xmit(skb, dev)) {
+ HARD_TX_UNLOCK(dev);
+ goto out;
+ }
+ }
+ HARD_TX_UNLOCK(dev);
+ if (net_ratelimit())
+ printk(KERN_CRIT "Virtual device %s asks to "
+ "queue packet!\n", dev->name);
+ } else {
+ /* Recursion is detected! It is possible,
+ * unfortunately */
+ if (net_ratelimit())
+ printk(KERN_CRIT "Dead loop on virtual device "
+ "%s, fix it urgently!\n", dev->name);
+ }
+ }
+
+ rc = -ENETDOWN;
+ local_bh_enable();
+
+out_kfree_skb:
+ kfree_skb(skb);
+ return rc;
+out:
+ local_bh_enable();
+ return rc;
+}
+
+
+/*=======================================================================
+ Receiver routines
+ =======================================================================*/
+
+int netdev_max_backlog = 300;
+int weight_p = 64; /* old backlog weight */
+/* These numbers are selected based on intuition and some
+ * experimentatiom, if you have more scientific way of doing this
+ * please go ahead and fix things.
+ */
+int no_cong_thresh = 10;
+int no_cong = 20;
+int lo_cong = 100;
+int mod_cong = 290;
+
+DEFINE_PER_CPU(struct netif_rx_stats, netdev_rx_stat) = { 0, };
+
+
+static void get_sample_stats(int cpu)
+{
+#ifdef RAND_LIE
+ unsigned long rd;
+ int rq;
+#endif
+ struct softnet_data *sd = &per_cpu(softnet_data, cpu);
+ int blog = sd->input_pkt_queue.qlen;
+ int avg_blog = sd->avg_blog;
+
+ avg_blog = (avg_blog >> 1) + (blog >> 1);
+
+ if (avg_blog > mod_cong) {
+ /* Above moderate congestion levels. */
+ sd->cng_level = NET_RX_CN_HIGH;
+#ifdef RAND_LIE
+ rd = net_random();
+ rq = rd % netdev_max_backlog;
+ if (rq < avg_blog) /* unlucky bastard */
+ sd->cng_level = NET_RX_DROP;
+#endif
+ } else if (avg_blog > lo_cong) {
+ sd->cng_level = NET_RX_CN_MOD;
+#ifdef RAND_LIE
+ rd = net_random();
+ rq = rd % netdev_max_backlog;
+ if (rq < avg_blog) /* unlucky bastard */
+ sd->cng_level = NET_RX_CN_HIGH;
+#endif
+ } else if (avg_blog > no_cong)
+ sd->cng_level = NET_RX_CN_LOW;
+ else /* no congestion */
+ sd->cng_level = NET_RX_SUCCESS;
+
+ sd->avg_blog = avg_blog;
+}
+
+#ifdef OFFLINE_SAMPLE
+static void sample_queue(unsigned long dummy)
+{
+/* 10 ms 0r 1ms -- i don't care -- JHS */
+ int next_tick = 1;
+ int cpu = smp_processor_id();
+
+ get_sample_stats(cpu);
+ next_tick += jiffies;
+ mod_timer(&samp_timer, next_tick);
+}
+#endif
+
+
+/**
+ * netif_rx - post buffer to the network code
+ * @skb: buffer to post
+ *
+ * This function receives a packet from a device driver and queues it for
+ * the upper (protocol) levels to process. It always succeeds. The buffer
+ * may be dropped during processing for congestion control or by the
+ * protocol layers.
+ *
+ * return values:
+ * NET_RX_SUCCESS (no congestion)
+ * NET_RX_CN_LOW (low congestion)
+ * NET_RX_CN_MOD (moderate congestion)
+ * NET_RX_CN_HIGH (high congestion)
+ * NET_RX_DROP (packet was dropped)
+ *
+ */
+
+int netif_rx(struct sk_buff *skb)
+{
+ int this_cpu;
+ struct softnet_data *queue;
+ unsigned long flags;
+
+ /* if netpoll wants it, pretend we never saw it */
+ if (netpoll_rx(skb))
+ return NET_RX_DROP;
+
+ if (!skb->stamp.tv_sec)
+ net_timestamp(&skb->stamp);
+
+ /*
+ * The code is rearranged so that the path is the most
+ * short when CPU is congested, but is still operating.
+ */
+ local_irq_save(flags);
+ this_cpu = smp_processor_id();
+ queue = &__get_cpu_var(softnet_data);
+
+ __get_cpu_var(netdev_rx_stat).total++;
+ if (queue->input_pkt_queue.qlen <= netdev_max_backlog) {
+ if (queue->input_pkt_queue.qlen) {
+ if (queue->throttle)
+ goto drop;
+
+enqueue:
+ dev_hold(skb->dev);
+ __skb_queue_tail(&queue->input_pkt_queue, skb);
+#ifndef OFFLINE_SAMPLE
+ get_sample_stats(this_cpu);
+#endif
+ local_irq_restore(flags);
+ return queue->cng_level;
+ }
+
+ if (queue->throttle)
+ queue->throttle = 0;
+
+ netif_rx_schedule(&queue->backlog_dev);
+ goto enqueue;
+ }
+
+ if (!queue->throttle) {
+ queue->throttle = 1;
+ __get_cpu_var(netdev_rx_stat).throttled++;
+ }
+
+drop:
+ __get_cpu_var(netdev_rx_stat).dropped++;
+ local_irq_restore(flags);
+
+ kfree_skb(skb);
+ return NET_RX_DROP;
+}
+
+int netif_rx_ni(struct sk_buff *skb)
+{
+ int err;
+
+ preempt_disable();
+ err = netif_rx(skb);
+ if (local_softirq_pending())
+ do_softirq();
+ preempt_enable();
+
+ return err;
+}
+
+EXPORT_SYMBOL(netif_rx_ni);
+
+static __inline__ void skb_bond(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+
+ if (dev->master) {
+ skb->real_dev = skb->dev;
+ skb->dev = dev->master;
+ }
+}
+
+static void net_tx_action(struct softirq_action *h)
+{
+ struct softnet_data *sd = &__get_cpu_var(softnet_data);
+
+ if (sd->completion_queue) {
+ struct sk_buff *clist;
+
+ local_irq_disable();
+ clist = sd->completion_queue;
+ sd->completion_queue = NULL;
+ local_irq_enable();
+
+ while (clist) {
+ struct sk_buff *skb = clist;
+ clist = clist->next;
+
+ BUG_TRAP(!atomic_read(&skb->users));
+ __kfree_skb(skb);
+ }
+ }
+
+ if (sd->output_queue) {
+ struct net_device *head;
+
+ local_irq_disable();
+ head = sd->output_queue;
+ sd->output_queue = NULL;
+ local_irq_enable();
+
+ while (head) {
+ struct net_device *dev = head;
+ head = head->next_sched;
+
+ smp_mb__before_clear_bit();
+ clear_bit(__LINK_STATE_SCHED, &dev->state);
+
+ if (spin_trylock(&dev->queue_lock)) {
+ qdisc_run(dev);
+ spin_unlock(&dev->queue_lock);
+ } else {
+ netif_schedule(dev);
+ }
+ }
+ }
+}
+
+static __inline__ int deliver_skb(struct sk_buff *skb,
+ struct packet_type *pt_prev)
+{
+ atomic_inc(&skb->users);
+ return pt_prev->func(skb, skb->dev, pt_prev);
+}
+
+#if defined(CONFIG_BRIDGE) || defined (CONFIG_BRIDGE_MODULE)
+int (*br_handle_frame_hook)(struct net_bridge_port *p, struct sk_buff **pskb);
+struct net_bridge;
+struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
+ unsigned char *addr);
+void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
+
+static __inline__ int handle_bridge(struct sk_buff **pskb,
+ struct packet_type **pt_prev, int *ret)
+{
+ struct net_bridge_port *port;
+
+ if ((*pskb)->pkt_type == PACKET_LOOPBACK ||
+ (port = rcu_dereference((*pskb)->dev->br_port)) == NULL)
+ return 0;
+
+ if (*pt_prev) {
+ *ret = deliver_skb(*pskb, *pt_prev);
+ *pt_prev = NULL;
+ }
+
+ return br_handle_frame_hook(port, pskb);
+}
+#else
+#define handle_bridge(skb, pt_prev, ret) (0)
+#endif
+
+#ifdef CONFIG_NET_CLS_ACT
+/* TODO: Maybe we should just force sch_ingress to be compiled in
+ * when CONFIG_NET_CLS_ACT is? otherwise some useless instructions
+ * a compare and 2 stores extra right now if we dont have it on
+ * but have CONFIG_NET_CLS_ACT
+ * NOTE: This doesnt stop any functionality; if you dont have
+ * the ingress scheduler, you just cant add policies on ingress.
+ *
+ */
+static int ing_filter(struct sk_buff *skb)
+{
+ struct Qdisc *q;
+ struct net_device *dev = skb->dev;
+ int result = TC_ACT_OK;
+
+ if (dev->qdisc_ingress) {
+ __u32 ttl = (__u32) G_TC_RTTL(skb->tc_verd);
+ if (MAX_RED_LOOP < ttl++) {
+ printk("Redir loop detected Dropping packet (%s->%s)\n",
+ skb->input_dev?skb->input_dev->name:"??",skb->dev->name);
+ return TC_ACT_SHOT;
+ }
+
+ skb->tc_verd = SET_TC_RTTL(skb->tc_verd,ttl);
+
+ skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_INGRESS);
+ if (NULL == skb->input_dev) {
+ skb->input_dev = skb->dev;
+ printk("ing_filter: fixed %s out %s\n",skb->input_dev->name,skb->dev->name);
+ }
+ spin_lock(&dev->ingress_lock);
+ if ((q = dev->qdisc_ingress) != NULL)
+ result = q->enqueue(skb, q);
+ spin_unlock(&dev->ingress_lock);
+
+ }
+
+ return result;
+}
+#endif
+
+int netif_receive_skb(struct sk_buff *skb)
+{
+ struct packet_type *ptype, *pt_prev;
+ int ret = NET_RX_DROP;
+ unsigned short type;
+
+ /* if we've gotten here through NAPI, check netpoll */
+ if (skb->dev->poll && netpoll_rx(skb))
+ return NET_RX_DROP;
+
+ if (!skb->stamp.tv_sec)
+ net_timestamp(&skb->stamp);
+
+ skb_bond(skb);
+
+ __get_cpu_var(netdev_rx_stat).total++;
+
+ skb->h.raw = skb->nh.raw = skb->data;
+ skb->mac_len = skb->nh.raw - skb->mac.raw;
+
+ pt_prev = NULL;
+
+ rcu_read_lock();
+
+#ifdef CONFIG_NET_CLS_ACT
+ if (skb->tc_verd & TC_NCLS) {
+ skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
+ goto ncls;
+ }
+#endif
+
+ list_for_each_entry_rcu(ptype, &ptype_all, list) {
+ if (!ptype->dev || ptype->dev == skb->dev) {
+ if (pt_prev)
+ ret = deliver_skb(skb, pt_prev);
+ pt_prev = ptype;
+ }
+ }
+
+#ifdef CONFIG_NET_CLS_ACT
+ if (pt_prev) {
+ ret = deliver_skb(skb, pt_prev);
+ pt_prev = NULL; /* noone else should process this after*/
+ } else {
+ skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd);
+ }
+
+ ret = ing_filter(skb);
+
+ if (ret == TC_ACT_SHOT || (ret == TC_ACT_STOLEN)) {
+ kfree_skb(skb);
+ goto out;
+ }
+
+ skb->tc_verd = 0;
+ncls:
+#endif
+
+ handle_diverter(skb);
+
+ if (handle_bridge(&skb, &pt_prev, &ret))
+ goto out;
+
+ type = skb->protocol;
+ list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type)&15], list) {
+ if (ptype->type == type &&
+ (!ptype->dev || ptype->dev == skb->dev)) {
+ if (pt_prev)
+ ret = deliver_skb(skb, pt_prev);
+ pt_prev = ptype;
+ }
+ }
+
+ if (pt_prev) {
+ ret = pt_prev->func(skb, skb->dev, pt_prev);
+ } else {
+ kfree_skb(skb);
+ /* Jamal, now you will not able to escape explaining
+ * me how you were going to use this. :-)
+ */
+ ret = NET_RX_DROP;
+ }
+
+out:
+ rcu_read_unlock();
+ return ret;
+}
+
+static int process_backlog(struct net_device *backlog_dev, int *budget)
+{
+ int work = 0;
+ int quota = min(backlog_dev->quota, *budget);
+ struct softnet_data *queue = &__get_cpu_var(softnet_data);
+ unsigned long start_time = jiffies;
+
+ for (;;) {
+ struct sk_buff *skb;
+ struct net_device *dev;
+
+ local_irq_disable();
+ skb = __skb_dequeue(&queue->input_pkt_queue);
+ if (!skb)
+ goto job_done;
+ local_irq_enable();
+
+ dev = skb->dev;
+
+ netif_receive_skb(skb);
+
+ dev_put(dev);
+
+ work++;
+
+ if (work >= quota || jiffies - start_time > 1)
+ break;
+
+ }
+
+ backlog_dev->quota -= work;
+ *budget -= work;
+ return -1;
+
+job_done:
+ backlog_dev->quota -= work;
+ *budget -= work;
+
+ list_del(&backlog_dev->poll_list);
+ smp_mb__before_clear_bit();
+ netif_poll_enable(backlog_dev);
+
+ if (queue->throttle)
+ queue->throttle = 0;
+ local_irq_enable();
+ return 0;
+}
+
+static void net_rx_action(struct softirq_action *h)
+{
+ struct softnet_data *queue = &__get_cpu_var(softnet_data);
+ unsigned long start_time = jiffies;
+ int budget = netdev_max_backlog;
+
+
+ local_irq_disable();
+
+ while (!list_empty(&queue->poll_list)) {
+ struct net_device *dev;
+
+ if (budget <= 0 || jiffies - start_time > 1)
+ goto softnet_break;
+
+ local_irq_enable();
+
+ dev = list_entry(queue->poll_list.next,
+ struct net_device, poll_list);
+ netpoll_poll_lock(dev);
+
+ if (dev->quota <= 0 || dev->poll(dev, &budget)) {
+ netpoll_poll_unlock(dev);
+ local_irq_disable();
+ list_del(&dev->poll_list);
+ list_add_tail(&dev->poll_list, &queue->poll_list);
+ if (dev->quota < 0)
+ dev->quota += dev->weight;
+ else
+ dev->quota = dev->weight;
+ } else {
+ netpoll_poll_unlock(dev);
+ dev_put(dev);
+ local_irq_disable();
+ }
+ }
+out:
+ local_irq_enable();
+ return;
+
+softnet_break:
+ __get_cpu_var(netdev_rx_stat).time_squeeze++;
+ __raise_softirq_irqoff(NET_RX_SOFTIRQ);
+ goto out;
+}
+
+static gifconf_func_t * gifconf_list [NPROTO];
+
+/**
+ * register_gifconf - register a SIOCGIF handler
+ * @family: Address family
+ * @gifconf: Function handler
+ *
+ * Register protocol dependent address dumping routines. The handler
+ * that is passed must not be freed or reused until it has been replaced
+ * by another handler.
+ */
+int register_gifconf(unsigned int family, gifconf_func_t * gifconf)
+{
+ if (family >= NPROTO)
+ return -EINVAL;
+ gifconf_list[family] = gifconf;
+ return 0;
+}
+
+
+/*
+ * Map an interface index to its name (SIOCGIFNAME)
+ */
+
+/*
+ * We need this ioctl for efficient implementation of the
+ * if_indextoname() function required by the IPv6 API. Without
+ * it, we would have to search all the interfaces to find a
+ * match. --pb
+ */
+
+static int dev_ifname(struct ifreq __user *arg)
+{
+ struct net_device *dev;
+ struct ifreq ifr;
+
+ /*
+ * Fetch the caller's info block.
+ */
+
+ if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
+ return -EFAULT;
+
+ read_lock(&dev_base_lock);
+ dev = __dev_get_by_index(ifr.ifr_ifindex);
+ if (!dev) {
+ read_unlock(&dev_base_lock);
+ return -ENODEV;
+ }
+
+ strcpy(ifr.ifr_name, dev->name);
+ read_unlock(&dev_base_lock);
+
+ if (copy_to_user(arg, &ifr, sizeof(struct ifreq)))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * Perform a SIOCGIFCONF call. This structure will change
+ * size eventually, and there is nothing I can do about it.
+ * Thus we will need a 'compatibility mode'.
+ */
+
+static int dev_ifconf(char __user *arg)
+{
+ struct ifconf ifc;
+ struct net_device *dev;
+ char __user *pos;
+ int len;
+ int total;
+ int i;
+
+ /*
+ * Fetch the caller's info block.
+ */
+
+ if (copy_from_user(&ifc, arg, sizeof(struct ifconf)))
+ return -EFAULT;
+
+ pos = ifc.ifc_buf;
+ len = ifc.ifc_len;
+
+ /*
+ * Loop over the interfaces, and write an info block for each.
+ */
+
+ total = 0;
+ for (dev = dev_base; dev; dev = dev->next) {
+ for (i = 0; i < NPROTO; i++) {
+ if (gifconf_list[i]) {
+ int done;
+ if (!pos)
+ done = gifconf_list[i](dev, NULL, 0);
+ else
+ done = gifconf_list[i](dev, pos + total,
+ len - total);
+ if (done < 0)
+ return -EFAULT;
+ total += done;
+ }
+ }
+ }
+
+ /*
+ * All done. Write the updated control block back to the caller.
+ */
+ ifc.ifc_len = total;
+
+ /*
+ * Both BSD and Solaris return 0 here, so we do too.
+ */
+ return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0;
+}
+
+#ifdef CONFIG_PROC_FS
+/*
+ * This is invoked by the /proc filesystem handler to display a device
+ * in detail.
+ */
+static __inline__ struct net_device *dev_get_idx(loff_t pos)
+{
+ struct net_device *dev;
+ loff_t i;
+
+ for (i = 0, dev = dev_base; dev && i < pos; ++i, dev = dev->next);
+
+ return i == pos ? dev : NULL;
+}
+
+void *dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock(&dev_base_lock);
+ return *pos ? dev_get_idx(*pos - 1) : SEQ_START_TOKEN;
+}
+
+void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ ++*pos;
+ return v == SEQ_START_TOKEN ? dev_base : ((struct net_device *)v)->next;
+}
+
+void dev_seq_stop(struct seq_file *seq, void *v)
+{
+ read_unlock(&dev_base_lock);
+}
+
+static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev)
+{
+ if (dev->get_stats) {
+ struct net_device_stats *stats = dev->get_stats(dev);
+
+ seq_printf(seq, "%6s:%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu "
+ "%8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n",
+ dev->name, stats->rx_bytes, stats->rx_packets,
+ stats->rx_errors,
+ stats->rx_dropped + stats->rx_missed_errors,
+ stats->rx_fifo_errors,
+ stats->rx_length_errors + stats->rx_over_errors +
+ stats->rx_crc_errors + stats->rx_frame_errors,
+ stats->rx_compressed, stats->multicast,
+ stats->tx_bytes, stats->tx_packets,
+ stats->tx_errors, stats->tx_dropped,
+ stats->tx_fifo_errors, stats->collisions,
+ stats->tx_carrier_errors +
+ stats->tx_aborted_errors +
+ stats->tx_window_errors +
+ stats->tx_heartbeat_errors,
+ stats->tx_compressed);
+ } else
+ seq_printf(seq, "%6s: No statistics available.\n", dev->name);
+}
+
+/*
+ * Called from the PROCfs module. This now uses the new arbitrary sized
+ * /proc/net interface to create /proc/net/dev
+ */
+static int dev_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN)
+ seq_puts(seq, "Inter-| Receive "
+ " | Transmit\n"
+ " face |bytes packets errs drop fifo frame "
+ "compressed multicast|bytes packets errs "
+ "drop fifo colls carrier compressed\n");
+ else
+ dev_seq_printf_stats(seq, v);
+ return 0;
+}
+
+static struct netif_rx_stats *softnet_get_online(loff_t *pos)
+{
+ struct netif_rx_stats *rc = NULL;
+
+ while (*pos < NR_CPUS)
+ if (cpu_online(*pos)) {
+ rc = &per_cpu(netdev_rx_stat, *pos);
+ break;
+ } else
+ ++*pos;
+ return rc;
+}
+
+static void *softnet_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ return softnet_get_online(pos);
+}
+
+static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ ++*pos;
+ return softnet_get_online(pos);
+}
+
+static void softnet_seq_stop(struct seq_file *seq, void *v)
+{
+}
+
+static int softnet_seq_show(struct seq_file *seq, void *v)
+{
+ struct netif_rx_stats *s = v;
+
+ seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
+ s->total, s->dropped, s->time_squeeze, s->throttled,
+ s->fastroute_hit, s->fastroute_success, s->fastroute_defer,
+ s->fastroute_deferred_out,
+#if 0
+ s->fastroute_latency_reduction
+#else
+ s->cpu_collision
+#endif
+ );
+ return 0;
+}
+
+static struct seq_operations dev_seq_ops = {
+ .start = dev_seq_start,
+ .next = dev_seq_next,
+ .stop = dev_seq_stop,
+ .show = dev_seq_show,
+};
+
+static int dev_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &dev_seq_ops);
+}
+
+static struct file_operations dev_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = dev_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static struct seq_operations softnet_seq_ops = {
+ .start = softnet_seq_start,
+ .next = softnet_seq_next,
+ .stop = softnet_seq_stop,
+ .show = softnet_seq_show,
+};
+
+static int softnet_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &softnet_seq_ops);
+}
+
+static struct file_operations softnet_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = softnet_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#ifdef WIRELESS_EXT
+extern int wireless_proc_init(void);
+#else
+#define wireless_proc_init() 0
+#endif
+
+static int __init dev_proc_init(void)
+{
+ int rc = -ENOMEM;
+
+ if (!proc_net_fops_create("dev", S_IRUGO, &dev_seq_fops))
+ goto out;
+ if (!proc_net_fops_create("softnet_stat", S_IRUGO, &softnet_seq_fops))
+ goto out_dev;
+ if (wireless_proc_init())
+ goto out_softnet;
+ rc = 0;
+out:
+ return rc;
+out_softnet:
+ proc_net_remove("softnet_stat");
+out_dev:
+ proc_net_remove("dev");
+ goto out;
+}
+#else
+#define dev_proc_init() 0
+#endif /* CONFIG_PROC_FS */
+
+
+/**
+ * netdev_set_master - set up master/slave pair
+ * @slave: slave device
+ * @master: new master device
+ *
+ * Changes the master device of the slave. Pass %NULL to break the
+ * bonding. The caller must hold the RTNL semaphore. On a failure
+ * a negative errno code is returned. On success the reference counts
+ * are adjusted, %RTM_NEWLINK is sent to the routing socket and the
+ * function returns zero.
+ */
+int netdev_set_master(struct net_device *slave, struct net_device *master)
+{
+ struct net_device *old = slave->master;
+
+ ASSERT_RTNL();
+
+ if (master) {
+ if (old)
+ return -EBUSY;
+ dev_hold(master);
+ }
+
+ slave->master = master;
+
+ synchronize_net();
+
+ if (old)
+ dev_put(old);
+
+ if (master)
+ slave->flags |= IFF_SLAVE;
+ else
+ slave->flags &= ~IFF_SLAVE;
+
+ rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE);
+ return 0;
+}
+
+/**
+ * dev_set_promiscuity - update promiscuity count on a device
+ * @dev: device
+ * @inc: modifier
+ *
+ * Add or remove promsicuity from a device. While the count in the device
+ * remains above zero the interface remains promiscuous. Once it hits zero
+ * the device reverts back to normal filtering operation. A negative inc
+ * value is used to drop promiscuity on the device.
+ */
+void dev_set_promiscuity(struct net_device *dev, int inc)
+{
+ unsigned short old_flags = dev->flags;
+
+ dev->flags |= IFF_PROMISC;
+ if ((dev->promiscuity += inc) == 0)
+ dev->flags &= ~IFF_PROMISC;
+ if (dev->flags ^ old_flags) {
+ dev_mc_upload(dev);
+ printk(KERN_INFO "device %s %s promiscuous mode\n",
+ dev->name, (dev->flags & IFF_PROMISC) ? "entered" :
+ "left");
+ }
+}
+
+/**
+ * dev_set_allmulti - update allmulti count on a device
+ * @dev: device
+ * @inc: modifier
+ *
+ * Add or remove reception of all multicast frames to a device. While the
+ * count in the device remains above zero the interface remains listening
+ * to all interfaces. Once it hits zero the device reverts back to normal
+ * filtering operation. A negative @inc value is used to drop the counter
+ * when releasing a resource needing all multicasts.
+ */
+
+void dev_set_allmulti(struct net_device *dev, int inc)
+{
+ unsigned short old_flags = dev->flags;
+
+ dev->flags |= IFF_ALLMULTI;
+ if ((dev->allmulti += inc) == 0)
+ dev->flags &= ~IFF_ALLMULTI;
+ if (dev->flags ^ old_flags)
+ dev_mc_upload(dev);
+}
+
+unsigned dev_get_flags(const struct net_device *dev)
+{
+ unsigned flags;
+
+ flags = (dev->flags & ~(IFF_PROMISC |
+ IFF_ALLMULTI |
+ IFF_RUNNING)) |
+ (dev->gflags & (IFF_PROMISC |
+ IFF_ALLMULTI));
+
+ if (netif_running(dev) && netif_carrier_ok(dev))
+ flags |= IFF_RUNNING;
+
+ return flags;
+}
+
+int dev_change_flags(struct net_device *dev, unsigned flags)
+{
+ int ret;
+ int old_flags = dev->flags;
+
+ /*
+ * Set the flags on our device.
+ */
+
+ dev->flags = (flags & (IFF_DEBUG | IFF_NOTRAILERS | IFF_NOARP |
+ IFF_DYNAMIC | IFF_MULTICAST | IFF_PORTSEL |
+ IFF_AUTOMEDIA)) |
+ (dev->flags & (IFF_UP | IFF_VOLATILE | IFF_PROMISC |
+ IFF_ALLMULTI));
+
+ /*
+ * Load in the correct multicast list now the flags have changed.
+ */
+
+ dev_mc_upload(dev);
+
+ /*
+ * Have we downed the interface. We handle IFF_UP ourselves
+ * according to user attempts to set it, rather than blindly
+ * setting it.
+ */
+
+ ret = 0;
+ if ((old_flags ^ flags) & IFF_UP) { /* Bit is different ? */
+ ret = ((old_flags & IFF_UP) ? dev_close : dev_open)(dev);
+
+ if (!ret)
+ dev_mc_upload(dev);
+ }
+
+ if (dev->flags & IFF_UP &&
+ ((old_flags ^ dev->flags) &~ (IFF_UP | IFF_PROMISC | IFF_ALLMULTI |
+ IFF_VOLATILE)))
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev);
+
+ if ((flags ^ dev->gflags) & IFF_PROMISC) {
+ int inc = (flags & IFF_PROMISC) ? +1 : -1;
+ dev->gflags ^= IFF_PROMISC;
+ dev_set_promiscuity(dev, inc);
+ }
+
+ /* NOTE: order of synchronization of IFF_PROMISC and IFF_ALLMULTI
+ is important. Some (broken) drivers set IFF_PROMISC, when
+ IFF_ALLMULTI is requested not asking us and not reporting.
+ */
+ if ((flags ^ dev->gflags) & IFF_ALLMULTI) {
+ int inc = (flags & IFF_ALLMULTI) ? +1 : -1;
+ dev->gflags ^= IFF_ALLMULTI;
+ dev_set_allmulti(dev, inc);
+ }
+
+ if (old_flags ^ dev->flags)
+ rtmsg_ifinfo(RTM_NEWLINK, dev, old_flags ^ dev->flags);
+
+ return ret;
+}
+
+int dev_set_mtu(struct net_device *dev, int new_mtu)
+{
+ int err;
+
+ if (new_mtu == dev->mtu)
+ return 0;
+
+ /* MTU must be positive. */
+ if (new_mtu < 0)
+ return -EINVAL;
+
+ if (!netif_device_present(dev))
+ return -ENODEV;
+
+ err = 0;
+ if (dev->change_mtu)
+ err = dev->change_mtu(dev, new_mtu);
+ else
+ dev->mtu = new_mtu;
+ if (!err && dev->flags & IFF_UP)
+ notifier_call_chain(&netdev_chain,
+ NETDEV_CHANGEMTU, dev);
+ return err;
+}
+
+int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa)
+{
+ int err;
+
+ if (!dev->set_mac_address)
+ return -EOPNOTSUPP;
+ if (sa->sa_family != dev->type)
+ return -EINVAL;
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ err = dev->set_mac_address(dev, sa);
+ if (!err)
+ notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev);
+ return err;
+}
+
+/*
+ * Perform the SIOCxIFxxx calls.
+ */
+static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd)
+{
+ int err;
+ struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
+
+ if (!dev)
+ return -ENODEV;
+
+ switch (cmd) {
+ case SIOCGIFFLAGS: /* Get interface flags */
+ ifr->ifr_flags = dev_get_flags(dev);
+ return 0;
+
+ case SIOCSIFFLAGS: /* Set interface flags */
+ return dev_change_flags(dev, ifr->ifr_flags);
+
+ case SIOCGIFMETRIC: /* Get the metric on the interface
+ (currently unused) */
+ ifr->ifr_metric = 0;
+ return 0;
+
+ case SIOCSIFMETRIC: /* Set the metric on the interface
+ (currently unused) */
+ return -EOPNOTSUPP;
+
+ case SIOCGIFMTU: /* Get the MTU of a device */
+ ifr->ifr_mtu = dev->mtu;
+ return 0;
+
+ case SIOCSIFMTU: /* Set the MTU of a device */
+ return dev_set_mtu(dev, ifr->ifr_mtu);
+
+ case SIOCGIFHWADDR:
+ if (!dev->addr_len)
+ memset(ifr->ifr_hwaddr.sa_data, 0, sizeof ifr->ifr_hwaddr.sa_data);
+ else
+ memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr,
+ min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
+ ifr->ifr_hwaddr.sa_family = dev->type;
+ return 0;
+
+ case SIOCSIFHWADDR:
+ return dev_set_mac_address(dev, &ifr->ifr_hwaddr);
+
+ case SIOCSIFHWBROADCAST:
+ if (ifr->ifr_hwaddr.sa_family != dev->type)
+ return -EINVAL;
+ memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data,
+ min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len));
+ notifier_call_chain(&netdev_chain,
+ NETDEV_CHANGEADDR, dev);
+ return 0;
+
+ case SIOCGIFMAP:
+ ifr->ifr_map.mem_start = dev->mem_start;
+ ifr->ifr_map.mem_end = dev->mem_end;
+ ifr->ifr_map.base_addr = dev->base_addr;
+ ifr->ifr_map.irq = dev->irq;
+ ifr->ifr_map.dma = dev->dma;
+ ifr->ifr_map.port = dev->if_port;
+ return 0;
+
+ case SIOCSIFMAP:
+ if (dev->set_config) {
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ return dev->set_config(dev, &ifr->ifr_map);
+ }
+ return -EOPNOTSUPP;
+
+ case SIOCADDMULTI:
+ if (!dev->set_multicast_list ||
+ ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
+ return -EINVAL;
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ return dev_mc_add(dev, ifr->ifr_hwaddr.sa_data,
+ dev->addr_len, 1);
+
+ case SIOCDELMULTI:
+ if (!dev->set_multicast_list ||
+ ifr->ifr_hwaddr.sa_family != AF_UNSPEC)
+ return -EINVAL;
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ return dev_mc_delete(dev, ifr->ifr_hwaddr.sa_data,
+ dev->addr_len, 1);
+
+ case SIOCGIFINDEX:
+ ifr->ifr_ifindex = dev->ifindex;
+ return 0;
+
+ case SIOCGIFTXQLEN:
+ ifr->ifr_qlen = dev->tx_queue_len;
+ return 0;
+
+ case SIOCSIFTXQLEN:
+ if (ifr->ifr_qlen < 0)
+ return -EINVAL;
+ dev->tx_queue_len = ifr->ifr_qlen;
+ return 0;
+
+ case SIOCSIFNAME:
+ ifr->ifr_newname[IFNAMSIZ-1] = '\0';
+ return dev_change_name(dev, ifr->ifr_newname);
+
+ /*
+ * Unknown or private ioctl
+ */
+
+ default:
+ if ((cmd >= SIOCDEVPRIVATE &&
+ cmd <= SIOCDEVPRIVATE + 15) ||
+ cmd == SIOCBONDENSLAVE ||
+ cmd == SIOCBONDRELEASE ||
+ cmd == SIOCBONDSETHWADDR ||
+ cmd == SIOCBONDSLAVEINFOQUERY ||
+ cmd == SIOCBONDINFOQUERY ||
+ cmd == SIOCBONDCHANGEACTIVE ||
+ cmd == SIOCGMIIPHY ||
+ cmd == SIOCGMIIREG ||
+ cmd == SIOCSMIIREG ||
+ cmd == SIOCBRADDIF ||
+ cmd == SIOCBRDELIF ||
+ cmd == SIOCWANDEV) {
+ err = -EOPNOTSUPP;
+ if (dev->do_ioctl) {
+ if (netif_device_present(dev))
+ err = dev->do_ioctl(dev, ifr,
+ cmd);
+ else
+ err = -ENODEV;
+ }
+ } else
+ err = -EINVAL;
+
+ }
+ return err;
+}
+
+/*
+ * This function handles all "interface"-type I/O control requests. The actual
+ * 'doing' part of this is dev_ifsioc above.
+ */
+
+/**
+ * dev_ioctl - network device ioctl
+ * @cmd: command to issue
+ * @arg: pointer to a struct ifreq in user space
+ *
+ * Issue ioctl functions to devices. This is normally called by the
+ * user space syscall interfaces but can sometimes be useful for
+ * other purposes. The return value is the return from the syscall if
+ * positive or a negative errno code on error.
+ */
+
+int dev_ioctl(unsigned int cmd, void __user *arg)
+{
+ struct ifreq ifr;
+ int ret;
+ char *colon;
+
+ /* One special case: SIOCGIFCONF takes ifconf argument
+ and requires shared lock, because it sleeps writing
+ to user space.
+ */
+
+ if (cmd == SIOCGIFCONF) {
+ rtnl_shlock();
+ ret = dev_ifconf((char __user *) arg);
+ rtnl_shunlock();
+ return ret;
+ }
+ if (cmd == SIOCGIFNAME)
+ return dev_ifname((struct ifreq __user *)arg);
+
+ if (copy_from_user(&ifr, arg, sizeof(struct ifreq)))
+ return -EFAULT;
+
+ ifr.ifr_name[IFNAMSIZ-1] = 0;
+
+ colon = strchr(ifr.ifr_name, ':');
+ if (colon)
+ *colon = 0;
+
+ /*
+ * See which interface the caller is talking about.
+ */
+
+ switch (cmd) {
+ /*
+ * These ioctl calls:
+ * - can be done by all.
+ * - atomic and do not require locking.
+ * - return a value
+ */
+ case SIOCGIFFLAGS:
+ case SIOCGIFMETRIC:
+ case SIOCGIFMTU:
+ case SIOCGIFHWADDR:
+ case SIOCGIFSLAVE:
+ case SIOCGIFMAP:
+ case SIOCGIFINDEX:
+ case SIOCGIFTXQLEN:
+ dev_load(ifr.ifr_name);
+ read_lock(&dev_base_lock);
+ ret = dev_ifsioc(&ifr, cmd);
+ read_unlock(&dev_base_lock);
+ if (!ret) {
+ if (colon)
+ *colon = ':';
+ if (copy_to_user(arg, &ifr,
+ sizeof(struct ifreq)))
+ ret = -EFAULT;
+ }
+ return ret;
+
+ case SIOCETHTOOL:
+ dev_load(ifr.ifr_name);
+ rtnl_lock();
+ ret = dev_ethtool(&ifr);
+ rtnl_unlock();
+ if (!ret) {
+ if (colon)
+ *colon = ':';
+ if (copy_to_user(arg, &ifr,
+ sizeof(struct ifreq)))
+ ret = -EFAULT;
+ }
+ return ret;
+
+ /*
+ * These ioctl calls:
+ * - require superuser power.
+ * - require strict serialization.
+ * - return a value
+ */
+ case SIOCGMIIPHY:
+ case SIOCGMIIREG:
+ case SIOCSIFNAME:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ dev_load(ifr.ifr_name);
+ rtnl_lock();
+ ret = dev_ifsioc(&ifr, cmd);
+ rtnl_unlock();
+ if (!ret) {
+ if (colon)
+ *colon = ':';
+ if (copy_to_user(arg, &ifr,
+ sizeof(struct ifreq)))
+ ret = -EFAULT;
+ }
+ return ret;
+
+ /*
+ * These ioctl calls:
+ * - require superuser power.
+ * - require strict serialization.
+ * - do not return a value
+ */
+ case SIOCSIFFLAGS:
+ case SIOCSIFMETRIC:
+ case SIOCSIFMTU:
+ case SIOCSIFMAP:
+ case SIOCSIFHWADDR:
+ case SIOCSIFSLAVE:
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ case SIOCSIFHWBROADCAST:
+ case SIOCSIFTXQLEN:
+ case SIOCSMIIREG:
+ case SIOCBONDENSLAVE:
+ case SIOCBONDRELEASE:
+ case SIOCBONDSETHWADDR:
+ case SIOCBONDSLAVEINFOQUERY:
+ case SIOCBONDINFOQUERY:
+ case SIOCBONDCHANGEACTIVE:
+ case SIOCBRADDIF:
+ case SIOCBRDELIF:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ dev_load(ifr.ifr_name);
+ rtnl_lock();
+ ret = dev_ifsioc(&ifr, cmd);
+ rtnl_unlock();
+ return ret;
+
+ case SIOCGIFMEM:
+ /* Get the per device memory space. We can add this but
+ * currently do not support it */
+ case SIOCSIFMEM:
+ /* Set the per device memory buffer space.
+ * Not applicable in our case */
+ case SIOCSIFLINK:
+ return -EINVAL;
+
+ /*
+ * Unknown or private ioctl.
+ */
+ default:
+ if (cmd == SIOCWANDEV ||
+ (cmd >= SIOCDEVPRIVATE &&
+ cmd <= SIOCDEVPRIVATE + 15)) {
+ dev_load(ifr.ifr_name);
+ rtnl_lock();
+ ret = dev_ifsioc(&ifr, cmd);
+ rtnl_unlock();
+ if (!ret && copy_to_user(arg, &ifr,
+ sizeof(struct ifreq)))
+ ret = -EFAULT;
+ return ret;
+ }
+#ifdef WIRELESS_EXT
+ /* Take care of Wireless Extensions */
+ if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
+ /* If command is `set a parameter', or
+ * `get the encoding parameters', check if
+ * the user has the right to do it */
+ if (IW_IS_SET(cmd) || cmd == SIOCGIWENCODE) {
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ }
+ dev_load(ifr.ifr_name);
+ rtnl_lock();
+ /* Follow me in net/core/wireless.c */
+ ret = wireless_process_ioctl(&ifr, cmd);
+ rtnl_unlock();
+ if (IW_IS_GET(cmd) &&
+ copy_to_user(arg, &ifr,
+ sizeof(struct ifreq)))
+ ret = -EFAULT;
+ return ret;
+ }
+#endif /* WIRELESS_EXT */
+ return -EINVAL;
+ }
+}
+
+
+/**
+ * dev_new_index - allocate an ifindex
+ *
+ * Returns a suitable unique value for a new device interface
+ * number. The caller must hold the rtnl semaphore or the
+ * dev_base_lock to be sure it remains unique.
+ */
+static int dev_new_index(void)
+{
+ static int ifindex;
+ for (;;) {
+ if (++ifindex <= 0)
+ ifindex = 1;
+ if (!__dev_get_by_index(ifindex))
+ return ifindex;
+ }
+}
+
+static int dev_boot_phase = 1;
+
+/* Delayed registration/unregisteration */
+static DEFINE_SPINLOCK(net_todo_list_lock);
+static struct list_head net_todo_list = LIST_HEAD_INIT(net_todo_list);
+
+static inline void net_set_todo(struct net_device *dev)
+{
+ spin_lock(&net_todo_list_lock);
+ list_add_tail(&dev->todo_list, &net_todo_list);
+ spin_unlock(&net_todo_list_lock);
+}
+
+/**
+ * register_netdevice - register a network device
+ * @dev: device to register
+ *
+ * Take a completed network device structure and add it to the kernel
+ * interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier
+ * chain. 0 is returned on success. A negative errno code is returned
+ * on a failure to set up the device, or if the name is a duplicate.
+ *
+ * Callers must hold the rtnl semaphore. You may want
+ * register_netdev() instead of this.
+ *
+ * BUGS:
+ * The locking appears insufficient to guarantee two parallel registers
+ * will not get the same name.
+ */
+
+int register_netdevice(struct net_device *dev)
+{
+ struct hlist_head *head;
+ struct hlist_node *p;
+ int ret;
+
+ BUG_ON(dev_boot_phase);
+ ASSERT_RTNL();
+
+ /* When net_device's are persistent, this will be fatal. */
+ BUG_ON(dev->reg_state != NETREG_UNINITIALIZED);
+
+ spin_lock_init(&dev->queue_lock);
+ spin_lock_init(&dev->xmit_lock);
+ dev->xmit_lock_owner = -1;
+#ifdef CONFIG_NET_CLS_ACT
+ spin_lock_init(&dev->ingress_lock);
+#endif
+
+ ret = alloc_divert_blk(dev);
+ if (ret)
+ goto out;
+
+ dev->iflink = -1;
+
+ /* Init, if this function is available */
+ if (dev->init) {
+ ret = dev->init(dev);
+ if (ret) {
+ if (ret > 0)
+ ret = -EIO;
+ goto out_err;
+ }
+ }
+
+ if (!dev_valid_name(dev->name)) {
+ ret = -EINVAL;
+ goto out_err;
+ }
+
+ dev->ifindex = dev_new_index();
+ if (dev->iflink == -1)
+ dev->iflink = dev->ifindex;
+
+ /* Check for existence of name */
+ head = dev_name_hash(dev->name);
+ hlist_for_each(p, head) {
+ struct net_device *d
+ = hlist_entry(p, struct net_device, name_hlist);
+ if (!strncmp(d->name, dev->name, IFNAMSIZ)) {
+ ret = -EEXIST;
+ goto out_err;
+ }
+ }
+
+ /* Fix illegal SG+CSUM combinations. */
+ if ((dev->features & NETIF_F_SG) &&
+ !(dev->features & (NETIF_F_IP_CSUM |
+ NETIF_F_NO_CSUM |
+ NETIF_F_HW_CSUM))) {
+ printk("%s: Dropping NETIF_F_SG since no checksum feature.\n",
+ dev->name);
+ dev->features &= ~NETIF_F_SG;
+ }
+
+ /* TSO requires that SG is present as well. */
+ if ((dev->features & NETIF_F_TSO) &&
+ !(dev->features & NETIF_F_SG)) {
+ printk("%s: Dropping NETIF_F_TSO since no SG feature.\n",
+ dev->name);
+ dev->features &= ~NETIF_F_TSO;
+ }
+
+ /*
+ * nil rebuild_header routine,
+ * that should be never called and used as just bug trap.
+ */
+
+ if (!dev->rebuild_header)
+ dev->rebuild_header = default_rebuild_header;
+
+ /*
+ * Default initial state at registry is that the
+ * device is present.
+ */
+
+ set_bit(__LINK_STATE_PRESENT, &dev->state);
+
+ dev->next = NULL;
+ dev_init_scheduler(dev);
+ write_lock_bh(&dev_base_lock);
+ *dev_tail = dev;
+ dev_tail = &dev->next;
+ hlist_add_head(&dev->name_hlist, head);
+ hlist_add_head(&dev->index_hlist, dev_index_hash(dev->ifindex));
+ dev_hold(dev);
+ dev->reg_state = NETREG_REGISTERING;
+ write_unlock_bh(&dev_base_lock);
+
+ /* Notify protocols, that a new device appeared. */
+ notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev);
+
+ /* Finish registration after unlock */
+ net_set_todo(dev);
+ ret = 0;
+
+out:
+ return ret;
+out_err:
+ free_divert_blk(dev);
+ goto out;
+}
+
+/**
+ * register_netdev - register a network device
+ * @dev: device to register
+ *
+ * Take a completed network device structure and add it to the kernel
+ * interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier
+ * chain. 0 is returned on success. A negative errno code is returned
+ * on a failure to set up the device, or if the name is a duplicate.
+ *
+ * This is a wrapper around register_netdev that takes the rtnl semaphore
+ * and expands the device name if you passed a format string to
+ * alloc_netdev.
+ */
+int register_netdev(struct net_device *dev)
+{
+ int err;
+
+ rtnl_lock();
+
+ /*
+ * If the name is a format string the caller wants us to do a
+ * name allocation.
+ */
+ if (strchr(dev->name, '%')) {
+ err = dev_alloc_name(dev, dev->name);
+ if (err < 0)
+ goto out;
+ }
+
+ /*
+ * Back compatibility hook. Kill this one in 2.5
+ */
+ if (dev->name[0] == 0 || dev->name[0] == ' ') {
+ err = dev_alloc_name(dev, "eth%d");
+ if (err < 0)
+ goto out;
+ }
+
+ err = register_netdevice(dev);
+out:
+ rtnl_unlock();
+ return err;
+}
+EXPORT_SYMBOL(register_netdev);
+
+/*
+ * netdev_wait_allrefs - wait until all references are gone.
+ *
+ * This is called when unregistering network devices.
+ *
+ * Any protocol or device that holds a reference should register
+ * for netdevice notification, and cleanup and put back the
+ * reference if they receive an UNREGISTER event.
+ * We can get stuck here if buggy protocols don't correctly
+ * call dev_put.
+ */
+static void netdev_wait_allrefs(struct net_device *dev)
+{
+ unsigned long rebroadcast_time, warning_time;
+
+ rebroadcast_time = warning_time = jiffies;
+ while (atomic_read(&dev->refcnt) != 0) {
+ if (time_after(jiffies, rebroadcast_time + 1 * HZ)) {
+ rtnl_shlock();
+
+ /* Rebroadcast unregister notification */
+ notifier_call_chain(&netdev_chain,
+ NETDEV_UNREGISTER, dev);
+
+ if (test_bit(__LINK_STATE_LINKWATCH_PENDING,
+ &dev->state)) {
+ /* We must not have linkwatch events
+ * pending on unregister. If this
+ * happens, we simply run the queue
+ * unscheduled, resulting in a noop
+ * for this device.
+ */
+ linkwatch_run_queue();
+ }
+
+ rtnl_shunlock();
+
+ rebroadcast_time = jiffies;
+ }
+
+ msleep(250);
+
+ if (time_after(jiffies, warning_time + 10 * HZ)) {
+ printk(KERN_EMERG "unregister_netdevice: "
+ "waiting for %s to become free. Usage "
+ "count = %d\n",
+ dev->name, atomic_read(&dev->refcnt));
+ warning_time = jiffies;
+ }
+ }
+}
+
+/* The sequence is:
+ *
+ * rtnl_lock();
+ * ...
+ * register_netdevice(x1);
+ * register_netdevice(x2);
+ * ...
+ * unregister_netdevice(y1);
+ * unregister_netdevice(y2);
+ * ...
+ * rtnl_unlock();
+ * free_netdev(y1);
+ * free_netdev(y2);
+ *
+ * We are invoked by rtnl_unlock() after it drops the semaphore.
+ * This allows us to deal with problems:
+ * 1) We can create/delete sysfs objects which invoke hotplug
+ * without deadlocking with linkwatch via keventd.
+ * 2) Since we run with the RTNL semaphore not held, we can sleep
+ * safely in order to wait for the netdev refcnt to drop to zero.
+ */
+static DECLARE_MUTEX(net_todo_run_mutex);
+void netdev_run_todo(void)
+{
+ struct list_head list = LIST_HEAD_INIT(list);
+ int err;
+
+
+ /* Need to guard against multiple cpu's getting out of order. */
+ down(&net_todo_run_mutex);
+
+ /* Not safe to do outside the semaphore. We must not return
+ * until all unregister events invoked by the local processor
+ * have been completed (either by this todo run, or one on
+ * another cpu).
+ */
+ if (list_empty(&net_todo_list))
+ goto out;
+
+ /* Snapshot list, allow later requests */
+ spin_lock(&net_todo_list_lock);
+ list_splice_init(&net_todo_list, &list);
+ spin_unlock(&net_todo_list_lock);
+
+ while (!list_empty(&list)) {
+ struct net_device *dev
+ = list_entry(list.next, struct net_device, todo_list);
+ list_del(&dev->todo_list);
+
+ switch(dev->reg_state) {
+ case NETREG_REGISTERING:
+ err = netdev_register_sysfs(dev);
+ if (err)
+ printk(KERN_ERR "%s: failed sysfs registration (%d)\n",
+ dev->name, err);
+ dev->reg_state = NETREG_REGISTERED;
+ break;
+
+ case NETREG_UNREGISTERING:
+ netdev_unregister_sysfs(dev);
+ dev->reg_state = NETREG_UNREGISTERED;
+
+ netdev_wait_allrefs(dev);
+
+ /* paranoia */
+ BUG_ON(atomic_read(&dev->refcnt));
+ BUG_TRAP(!dev->ip_ptr);
+ BUG_TRAP(!dev->ip6_ptr);
+ BUG_TRAP(!dev->dn_ptr);
+
+
+ /* It must be the very last action,
+ * after this 'dev' may point to freed up memory.
+ */
+ if (dev->destructor)
+ dev->destructor(dev);
+ break;
+
+ default:
+ printk(KERN_ERR "network todo '%s' but state %d\n",
+ dev->name, dev->reg_state);
+ break;
+ }
+ }
+
+out:
+ up(&net_todo_run_mutex);
+}
+
+/**
+ * alloc_netdev - allocate network device
+ * @sizeof_priv: size of private data to allocate space for
+ * @name: device name format string
+ * @setup: callback to initialize device
+ *
+ * Allocates a struct net_device with private data area for driver use
+ * and performs basic initialization.
+ */
+struct net_device *alloc_netdev(int sizeof_priv, const char *name,
+ void (*setup)(struct net_device *))
+{
+ void *p;
+ struct net_device *dev;
+ int alloc_size;
+
+ /* ensure 32-byte alignment of both the device and private area */
+ alloc_size = (sizeof(*dev) + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST;
+ alloc_size += sizeof_priv + NETDEV_ALIGN_CONST;
+
+ p = kmalloc(alloc_size, GFP_KERNEL);
+ if (!p) {
+ printk(KERN_ERR "alloc_dev: Unable to allocate device.\n");
+ return NULL;
+ }
+ memset(p, 0, alloc_size);
+
+ dev = (struct net_device *)
+ (((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST);
+ dev->padded = (char *)dev - (char *)p;
+
+ if (sizeof_priv)
+ dev->priv = netdev_priv(dev);
+
+ setup(dev);
+ strcpy(dev->name, name);
+ return dev;
+}
+EXPORT_SYMBOL(alloc_netdev);
+
+/**
+ * free_netdev - free network device
+ * @dev: device
+ *
+ * This function does the last stage of destroying an allocated device
+ * interface. The reference to the device object is released.
+ * If this is the last reference then it will be freed.
+ */
+void free_netdev(struct net_device *dev)
+{
+#ifdef CONFIG_SYSFS
+ /* Compatiablity with error handling in drivers */
+ if (dev->reg_state == NETREG_UNINITIALIZED) {
+ kfree((char *)dev - dev->padded);
+ return;
+ }
+
+ BUG_ON(dev->reg_state != NETREG_UNREGISTERED);
+ dev->reg_state = NETREG_RELEASED;
+
+ /* will free via class release */
+ class_device_put(&dev->class_dev);
+#else
+ kfree((char *)dev - dev->padded);
+#endif
+}
+
+/* Synchronize with packet receive processing. */
+void synchronize_net(void)
+{
+ might_sleep();
+ synchronize_kernel();
+}
+
+/**
+ * unregister_netdevice - remove device from the kernel
+ * @dev: device
+ *
+ * This function shuts down a device interface and removes it
+ * from the kernel tables. On success 0 is returned, on a failure
+ * a negative errno code is returned.
+ *
+ * Callers must hold the rtnl semaphore. You may want
+ * unregister_netdev() instead of this.
+ */
+
+int unregister_netdevice(struct net_device *dev)
+{
+ struct net_device *d, **dp;
+
+ BUG_ON(dev_boot_phase);
+ ASSERT_RTNL();
+
+ /* Some devices call without registering for initialization unwind. */
+ if (dev->reg_state == NETREG_UNINITIALIZED) {
+ printk(KERN_DEBUG "unregister_netdevice: device %s/%p never "
+ "was registered\n", dev->name, dev);
+ return -ENODEV;
+ }
+
+ BUG_ON(dev->reg_state != NETREG_REGISTERED);
+
+ /* If device is running, close it first. */
+ if (dev->flags & IFF_UP)
+ dev_close(dev);
+
+ /* And unlink it from device chain. */
+ for (dp = &dev_base; (d = *dp) != NULL; dp = &d->next) {
+ if (d == dev) {
+ write_lock_bh(&dev_base_lock);
+ hlist_del(&dev->name_hlist);
+ hlist_del(&dev->index_hlist);
+ if (dev_tail == &dev->next)
+ dev_tail = dp;
+ *dp = d->next;
+ write_unlock_bh(&dev_base_lock);
+ break;
+ }
+ }
+ if (!d) {
+ printk(KERN_ERR "unregister net_device: '%s' not found\n",
+ dev->name);
+ return -ENODEV;
+ }
+
+ dev->reg_state = NETREG_UNREGISTERING;
+
+ synchronize_net();
+
+ /* Shutdown queueing discipline. */
+ dev_shutdown(dev);
+
+
+ /* Notify protocols, that we are about to destroy
+ this device. They should clean all the things.
+ */
+ notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev);
+
+ /*
+ * Flush the multicast chain
+ */
+ dev_mc_discard(dev);
+
+ if (dev->uninit)
+ dev->uninit(dev);
+
+ /* Notifier chain MUST detach us from master device. */
+ BUG_TRAP(!dev->master);
+
+ free_divert_blk(dev);
+
+ /* Finish processing unregister after unlock */
+ net_set_todo(dev);
+
+ synchronize_net();
+
+ dev_put(dev);
+ return 0;
+}
+
+/**
+ * unregister_netdev - remove device from the kernel
+ * @dev: device
+ *
+ * This function shuts down a device interface and removes it
+ * from the kernel tables. On success 0 is returned, on a failure
+ * a negative errno code is returned.
+ *
+ * This is just a wrapper for unregister_netdevice that takes
+ * the rtnl semaphore. In general you want to use this and not
+ * unregister_netdevice.
+ */
+void unregister_netdev(struct net_device *dev)
+{
+ rtnl_lock();
+ unregister_netdevice(dev);
+ rtnl_unlock();
+}
+
+EXPORT_SYMBOL(unregister_netdev);
+
+#ifdef CONFIG_HOTPLUG_CPU
+static int dev_cpu_callback(struct notifier_block *nfb,
+ unsigned long action,
+ void *ocpu)
+{
+ struct sk_buff **list_skb;
+ struct net_device **list_net;
+ struct sk_buff *skb;
+ unsigned int cpu, oldcpu = (unsigned long)ocpu;
+ struct softnet_data *sd, *oldsd;
+
+ if (action != CPU_DEAD)
+ return NOTIFY_OK;
+
+ local_irq_disable();
+ cpu = smp_processor_id();
+ sd = &per_cpu(softnet_data, cpu);
+ oldsd = &per_cpu(softnet_data, oldcpu);
+
+ /* Find end of our completion_queue. */
+ list_skb = &sd->completion_queue;
+ while (*list_skb)
+ list_skb = &(*list_skb)->next;
+ /* Append completion queue from offline CPU. */
+ *list_skb = oldsd->completion_queue;
+ oldsd->completion_queue = NULL;
+
+ /* Find end of our output_queue. */
+ list_net = &sd->output_queue;
+ while (*list_net)
+ list_net = &(*list_net)->next_sched;
+ /* Append output queue from offline CPU. */
+ *list_net = oldsd->output_queue;
+ oldsd->output_queue = NULL;
+
+ raise_softirq_irqoff(NET_TX_SOFTIRQ);
+ local_irq_enable();
+
+ /* Process offline CPU's input_pkt_queue */
+ while ((skb = __skb_dequeue(&oldsd->input_pkt_queue)))
+ netif_rx(skb);
+
+ return NOTIFY_OK;
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
+
+/*
+ * Initialize the DEV module. At boot time this walks the device list and
+ * unhooks any devices that fail to initialise (normally hardware not
+ * present) and leaves us with a valid list of present and active devices.
+ *
+ */
+
+/*
+ * This is called single threaded during boot, so no need
+ * to take the rtnl semaphore.
+ */
+static int __init net_dev_init(void)
+{
+ int i, rc = -ENOMEM;
+
+ BUG_ON(!dev_boot_phase);
+
+ net_random_init();
+
+ if (dev_proc_init())
+ goto out;
+
+ if (netdev_sysfs_init())
+ goto out;
+
+ INIT_LIST_HEAD(&ptype_all);
+ for (i = 0; i < 16; i++)
+ INIT_LIST_HEAD(&ptype_base[i]);
+
+ for (i = 0; i < ARRAY_SIZE(dev_name_head); i++)
+ INIT_HLIST_HEAD(&dev_name_head[i]);
+
+ for (i = 0; i < ARRAY_SIZE(dev_index_head); i++)
+ INIT_HLIST_HEAD(&dev_index_head[i]);
+
+ /*
+ * Initialise the packet receive queues.
+ */
+
+ for (i = 0; i < NR_CPUS; i++) {
+ struct softnet_data *queue;
+
+ queue = &per_cpu(softnet_data, i);
+ skb_queue_head_init(&queue->input_pkt_queue);
+ queue->throttle = 0;
+ queue->cng_level = 0;
+ queue->avg_blog = 10; /* arbitrary non-zero */
+ queue->completion_queue = NULL;
+ INIT_LIST_HEAD(&queue->poll_list);
+ set_bit(__LINK_STATE_START, &queue->backlog_dev.state);
+ queue->backlog_dev.weight = weight_p;
+ queue->backlog_dev.poll = process_backlog;
+ atomic_set(&queue->backlog_dev.refcnt, 1);
+ }
+
+#ifdef OFFLINE_SAMPLE
+ samp_timer.expires = jiffies + (10 * HZ);
+ add_timer(&samp_timer);
+#endif
+
+ dev_boot_phase = 0;
+
+ open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL);
+ open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL);
+
+ hotcpu_notifier(dev_cpu_callback, 0);
+ dst_init();
+ dev_mcast_init();
+ rc = 0;
+out:
+ return rc;
+}
+
+subsys_initcall(net_dev_init);
+
+EXPORT_SYMBOL(__dev_get_by_index);
+EXPORT_SYMBOL(__dev_get_by_name);
+EXPORT_SYMBOL(__dev_remove_pack);
+EXPORT_SYMBOL(__skb_linearize);
+EXPORT_SYMBOL(dev_add_pack);
+EXPORT_SYMBOL(dev_alloc_name);
+EXPORT_SYMBOL(dev_close);
+EXPORT_SYMBOL(dev_get_by_flags);
+EXPORT_SYMBOL(dev_get_by_index);
+EXPORT_SYMBOL(dev_get_by_name);
+EXPORT_SYMBOL(dev_ioctl);
+EXPORT_SYMBOL(dev_open);
+EXPORT_SYMBOL(dev_queue_xmit);
+EXPORT_SYMBOL(dev_remove_pack);
+EXPORT_SYMBOL(dev_set_allmulti);
+EXPORT_SYMBOL(dev_set_promiscuity);
+EXPORT_SYMBOL(dev_change_flags);
+EXPORT_SYMBOL(dev_set_mtu);
+EXPORT_SYMBOL(dev_set_mac_address);
+EXPORT_SYMBOL(free_netdev);
+EXPORT_SYMBOL(netdev_boot_setup_check);
+EXPORT_SYMBOL(netdev_set_master);
+EXPORT_SYMBOL(netdev_state_change);
+EXPORT_SYMBOL(netif_receive_skb);
+EXPORT_SYMBOL(netif_rx);
+EXPORT_SYMBOL(register_gifconf);
+EXPORT_SYMBOL(register_netdevice);
+EXPORT_SYMBOL(register_netdevice_notifier);
+EXPORT_SYMBOL(skb_checksum_help);
+EXPORT_SYMBOL(synchronize_net);
+EXPORT_SYMBOL(unregister_netdevice);
+EXPORT_SYMBOL(unregister_netdevice_notifier);
+EXPORT_SYMBOL(net_enable_timestamp);
+EXPORT_SYMBOL(net_disable_timestamp);
+EXPORT_SYMBOL(dev_get_flags);
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+EXPORT_SYMBOL(br_handle_frame_hook);
+EXPORT_SYMBOL(br_fdb_get_hook);
+EXPORT_SYMBOL(br_fdb_put_hook);
+#endif
+
+#ifdef CONFIG_KMOD
+EXPORT_SYMBOL(dev_load);
+#endif
+
+EXPORT_PER_CPU_SYMBOL(softnet_data);
diff --git a/net/core/dev_mcast.c b/net/core/dev_mcast.c
new file mode 100644
index 0000000..db098ff
--- /dev/null
+++ b/net/core/dev_mcast.c
@@ -0,0 +1,299 @@
+/*
+ * Linux NET3: Multicast List maintenance.
+ *
+ * Authors:
+ * Tim Kordas <tjk@nostromo.eeap.cwru.edu>
+ * Richard Underwood <richard@wuzz.demon.co.uk>
+ *
+ * Stir fried together from the IP multicast and CAP patches above
+ * Alan Cox <Alan.Cox@linux.org>
+ *
+ * Fixes:
+ * Alan Cox : Update the device on a real delete
+ * rather than any time but...
+ * Alan Cox : IFF_ALLMULTI support.
+ * Alan Cox : New format set_multicast_list() calls.
+ * Gleb Natapov : Remove dev_mc_lock.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/bitops.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/in.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/if_ether.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <net/ip.h>
+#include <net/route.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/arp.h>
+
+
+/*
+ * Device multicast list maintenance.
+ *
+ * This is used both by IP and by the user level maintenance functions.
+ * Unlike BSD we maintain a usage count on a given multicast address so
+ * that a casual user application can add/delete multicasts used by
+ * protocols without doing damage to the protocols when it deletes the
+ * entries. It also helps IP as it tracks overlapping maps.
+ *
+ * Device mc lists are changed by bh at least if IPv6 is enabled,
+ * so that it must be bh protected.
+ *
+ * We block accesses to device mc filters with dev->xmit_lock.
+ */
+
+/*
+ * Update the multicast list into the physical NIC controller.
+ */
+
+static void __dev_mc_upload(struct net_device *dev)
+{
+ /* Don't do anything till we up the interface
+ * [dev_open will call this function so the list will
+ * stay sane]
+ */
+
+ if (!(dev->flags&IFF_UP))
+ return;
+
+ /*
+ * Devices with no set multicast or which have been
+ * detached don't get set.
+ */
+
+ if (dev->set_multicast_list == NULL ||
+ !netif_device_present(dev))
+ return;
+
+ dev->set_multicast_list(dev);
+}
+
+void dev_mc_upload(struct net_device *dev)
+{
+ spin_lock_bh(&dev->xmit_lock);
+ __dev_mc_upload(dev);
+ spin_unlock_bh(&dev->xmit_lock);
+}
+
+/*
+ * Delete a device level multicast
+ */
+
+int dev_mc_delete(struct net_device *dev, void *addr, int alen, int glbl)
+{
+ int err = 0;
+ struct dev_mc_list *dmi, **dmip;
+
+ spin_lock_bh(&dev->xmit_lock);
+
+ for (dmip = &dev->mc_list; (dmi = *dmip) != NULL; dmip = &dmi->next) {
+ /*
+ * Find the entry we want to delete. The device could
+ * have variable length entries so check these too.
+ */
+ if (memcmp(dmi->dmi_addr, addr, dmi->dmi_addrlen) == 0 &&
+ alen == dmi->dmi_addrlen) {
+ if (glbl) {
+ int old_glbl = dmi->dmi_gusers;
+ dmi->dmi_gusers = 0;
+ if (old_glbl == 0)
+ break;
+ }
+ if (--dmi->dmi_users)
+ goto done;
+
+ /*
+ * Last user. So delete the entry.
+ */
+ *dmip = dmi->next;
+ dev->mc_count--;
+
+ kfree(dmi);
+
+ /*
+ * We have altered the list, so the card
+ * loaded filter is now wrong. Fix it
+ */
+ __dev_mc_upload(dev);
+
+ spin_unlock_bh(&dev->xmit_lock);
+ return 0;
+ }
+ }
+ err = -ENOENT;
+done:
+ spin_unlock_bh(&dev->xmit_lock);
+ return err;
+}
+
+/*
+ * Add a device level multicast
+ */
+
+int dev_mc_add(struct net_device *dev, void *addr, int alen, int glbl)
+{
+ int err = 0;
+ struct dev_mc_list *dmi, *dmi1;
+
+ dmi1 = (struct dev_mc_list *)kmalloc(sizeof(*dmi), GFP_ATOMIC);
+
+ spin_lock_bh(&dev->xmit_lock);
+ for (dmi = dev->mc_list; dmi != NULL; dmi = dmi->next) {
+ if (memcmp(dmi->dmi_addr, addr, dmi->dmi_addrlen) == 0 &&
+ dmi->dmi_addrlen == alen) {
+ if (glbl) {
+ int old_glbl = dmi->dmi_gusers;
+ dmi->dmi_gusers = 1;
+ if (old_glbl)
+ goto done;
+ }
+ dmi->dmi_users++;
+ goto done;
+ }
+ }
+
+ if ((dmi = dmi1) == NULL) {
+ spin_unlock_bh(&dev->xmit_lock);
+ return -ENOMEM;
+ }
+ memcpy(dmi->dmi_addr, addr, alen);
+ dmi->dmi_addrlen = alen;
+ dmi->next = dev->mc_list;
+ dmi->dmi_users = 1;
+ dmi->dmi_gusers = glbl ? 1 : 0;
+ dev->mc_list = dmi;
+ dev->mc_count++;
+
+ __dev_mc_upload(dev);
+
+ spin_unlock_bh(&dev->xmit_lock);
+ return 0;
+
+done:
+ spin_unlock_bh(&dev->xmit_lock);
+ if (dmi1)
+ kfree(dmi1);
+ return err;
+}
+
+/*
+ * Discard multicast list when a device is downed
+ */
+
+void dev_mc_discard(struct net_device *dev)
+{
+ spin_lock_bh(&dev->xmit_lock);
+
+ while (dev->mc_list != NULL) {
+ struct dev_mc_list *tmp = dev->mc_list;
+ dev->mc_list = tmp->next;
+ if (tmp->dmi_users > tmp->dmi_gusers)
+ printk("dev_mc_discard: multicast leakage! dmi_users=%d\n", tmp->dmi_users);
+ kfree(tmp);
+ }
+ dev->mc_count = 0;
+
+ spin_unlock_bh(&dev->xmit_lock);
+}
+
+#ifdef CONFIG_PROC_FS
+static void *dev_mc_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct net_device *dev;
+ loff_t off = 0;
+
+ read_lock(&dev_base_lock);
+ for (dev = dev_base; dev; dev = dev->next) {
+ if (off++ == *pos)
+ return dev;
+ }
+ return NULL;
+}
+
+static void *dev_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct net_device *dev = v;
+ ++*pos;
+ return dev->next;
+}
+
+static void dev_mc_seq_stop(struct seq_file *seq, void *v)
+{
+ read_unlock(&dev_base_lock);
+}
+
+
+static int dev_mc_seq_show(struct seq_file *seq, void *v)
+{
+ struct dev_mc_list *m;
+ struct net_device *dev = v;
+
+ spin_lock_bh(&dev->xmit_lock);
+ for (m = dev->mc_list; m; m = m->next) {
+ int i;
+
+ seq_printf(seq, "%-4d %-15s %-5d %-5d ", dev->ifindex,
+ dev->name, m->dmi_users, m->dmi_gusers);
+
+ for (i = 0; i < m->dmi_addrlen; i++)
+ seq_printf(seq, "%02x", m->dmi_addr[i]);
+
+ seq_putc(seq, '\n');
+ }
+ spin_unlock_bh(&dev->xmit_lock);
+ return 0;
+}
+
+static struct seq_operations dev_mc_seq_ops = {
+ .start = dev_mc_seq_start,
+ .next = dev_mc_seq_next,
+ .stop = dev_mc_seq_stop,
+ .show = dev_mc_seq_show,
+};
+
+static int dev_mc_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &dev_mc_seq_ops);
+}
+
+static struct file_operations dev_mc_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = dev_mc_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#endif
+
+void __init dev_mcast_init(void)
+{
+ proc_net_fops_create("dev_mcast", 0, &dev_mc_seq_fops);
+}
+
+EXPORT_SYMBOL(dev_mc_add);
+EXPORT_SYMBOL(dev_mc_delete);
+EXPORT_SYMBOL(dev_mc_upload);
diff --git a/net/core/dst.c b/net/core/dst.c
new file mode 100644
index 0000000..3bf6cc4
--- /dev/null
+++ b/net/core/dst.c
@@ -0,0 +1,276 @@
+/*
+ * net/core/dst.c Protocol independent destination cache.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ */
+
+#include <linux/bitops.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/sched.h>
+#include <linux/skbuff.h>
+#include <linux/string.h>
+#include <linux/types.h>
+
+#include <net/dst.h>
+
+/* Locking strategy:
+ * 1) Garbage collection state of dead destination cache
+ * entries is protected by dst_lock.
+ * 2) GC is run only from BH context, and is the only remover
+ * of entries.
+ * 3) Entries are added to the garbage list from both BH
+ * and non-BH context, so local BH disabling is needed.
+ * 4) All operations modify state, so a spinlock is used.
+ */
+static struct dst_entry *dst_garbage_list;
+#if RT_CACHE_DEBUG >= 2
+static atomic_t dst_total = ATOMIC_INIT(0);
+#endif
+static DEFINE_SPINLOCK(dst_lock);
+
+static unsigned long dst_gc_timer_expires;
+static unsigned long dst_gc_timer_inc = DST_GC_MAX;
+static void dst_run_gc(unsigned long);
+static void ___dst_free(struct dst_entry * dst);
+
+static struct timer_list dst_gc_timer =
+ TIMER_INITIALIZER(dst_run_gc, DST_GC_MIN, 0);
+
+static void dst_run_gc(unsigned long dummy)
+{
+ int delayed = 0;
+ struct dst_entry * dst, **dstp;
+
+ if (!spin_trylock(&dst_lock)) {
+ mod_timer(&dst_gc_timer, jiffies + HZ/10);
+ return;
+ }
+
+
+ del_timer(&dst_gc_timer);
+ dstp = &dst_garbage_list;
+ while ((dst = *dstp) != NULL) {
+ if (atomic_read(&dst->__refcnt)) {
+ dstp = &dst->next;
+ delayed++;
+ continue;
+ }
+ *dstp = dst->next;
+
+ dst = dst_destroy(dst);
+ if (dst) {
+ /* NOHASH and still referenced. Unless it is already
+ * on gc list, invalidate it and add to gc list.
+ *
+ * Note: this is temporary. Actually, NOHASH dst's
+ * must be obsoleted when parent is obsoleted.
+ * But we do not have state "obsoleted, but
+ * referenced by parent", so it is right.
+ */
+ if (dst->obsolete > 1)
+ continue;
+
+ ___dst_free(dst);
+ dst->next = *dstp;
+ *dstp = dst;
+ dstp = &dst->next;
+ }
+ }
+ if (!dst_garbage_list) {
+ dst_gc_timer_inc = DST_GC_MAX;
+ goto out;
+ }
+ if ((dst_gc_timer_expires += dst_gc_timer_inc) > DST_GC_MAX)
+ dst_gc_timer_expires = DST_GC_MAX;
+ dst_gc_timer_inc += DST_GC_INC;
+ dst_gc_timer.expires = jiffies + dst_gc_timer_expires;
+#if RT_CACHE_DEBUG >= 2
+ printk("dst_total: %d/%d %ld\n",
+ atomic_read(&dst_total), delayed, dst_gc_timer_expires);
+#endif
+ add_timer(&dst_gc_timer);
+
+out:
+ spin_unlock(&dst_lock);
+}
+
+static int dst_discard_in(struct sk_buff *skb)
+{
+ kfree_skb(skb);
+ return 0;
+}
+
+static int dst_discard_out(struct sk_buff *skb)
+{
+ kfree_skb(skb);
+ return 0;
+}
+
+void * dst_alloc(struct dst_ops * ops)
+{
+ struct dst_entry * dst;
+
+ if (ops->gc && atomic_read(&ops->entries) > ops->gc_thresh) {
+ if (ops->gc())
+ return NULL;
+ }
+ dst = kmem_cache_alloc(ops->kmem_cachep, SLAB_ATOMIC);
+ if (!dst)
+ return NULL;
+ memset(dst, 0, ops->entry_size);
+ atomic_set(&dst->__refcnt, 0);
+ dst->ops = ops;
+ dst->lastuse = jiffies;
+ dst->path = dst;
+ dst->input = dst_discard_in;
+ dst->output = dst_discard_out;
+#if RT_CACHE_DEBUG >= 2
+ atomic_inc(&dst_total);
+#endif
+ atomic_inc(&ops->entries);
+ return dst;
+}
+
+static void ___dst_free(struct dst_entry * dst)
+{
+ /* The first case (dev==NULL) is required, when
+ protocol module is unloaded.
+ */
+ if (dst->dev == NULL || !(dst->dev->flags&IFF_UP)) {
+ dst->input = dst_discard_in;
+ dst->output = dst_discard_out;
+ }
+ dst->obsolete = 2;
+}
+
+void __dst_free(struct dst_entry * dst)
+{
+ spin_lock_bh(&dst_lock);
+ ___dst_free(dst);
+ dst->next = dst_garbage_list;
+ dst_garbage_list = dst;
+ if (dst_gc_timer_inc > DST_GC_INC) {
+ dst_gc_timer_inc = DST_GC_INC;
+ dst_gc_timer_expires = DST_GC_MIN;
+ mod_timer(&dst_gc_timer, jiffies + dst_gc_timer_expires);
+ }
+ spin_unlock_bh(&dst_lock);
+}
+
+struct dst_entry *dst_destroy(struct dst_entry * dst)
+{
+ struct dst_entry *child;
+ struct neighbour *neigh;
+ struct hh_cache *hh;
+
+ smp_rmb();
+
+again:
+ neigh = dst->neighbour;
+ hh = dst->hh;
+ child = dst->child;
+
+ dst->hh = NULL;
+ if (hh && atomic_dec_and_test(&hh->hh_refcnt))
+ kfree(hh);
+
+ if (neigh) {
+ dst->neighbour = NULL;
+ neigh_release(neigh);
+ }
+
+ atomic_dec(&dst->ops->entries);
+
+ if (dst->ops->destroy)
+ dst->ops->destroy(dst);
+ if (dst->dev)
+ dev_put(dst->dev);
+#if RT_CACHE_DEBUG >= 2
+ atomic_dec(&dst_total);
+#endif
+ kmem_cache_free(dst->ops->kmem_cachep, dst);
+
+ dst = child;
+ if (dst) {
+ if (atomic_dec_and_test(&dst->__refcnt)) {
+ /* We were real parent of this dst, so kill child. */
+ if (dst->flags&DST_NOHASH)
+ goto again;
+ } else {
+ /* Child is still referenced, return it for freeing. */
+ if (dst->flags&DST_NOHASH)
+ return dst;
+ /* Child is still in his hash table */
+ }
+ }
+ return NULL;
+}
+
+/* Dirty hack. We did it in 2.2 (in __dst_free),
+ * we have _very_ good reasons not to repeat
+ * this mistake in 2.3, but we have no choice
+ * now. _It_ _is_ _explicit_ _deliberate_
+ * _race_ _condition_.
+ *
+ * Commented and originally written by Alexey.
+ */
+static inline void dst_ifdown(struct dst_entry *dst, struct net_device *dev,
+ int unregister)
+{
+ if (dst->ops->ifdown)
+ dst->ops->ifdown(dst, dev, unregister);
+
+ if (dev != dst->dev)
+ return;
+
+ if (!unregister) {
+ dst->input = dst_discard_in;
+ dst->output = dst_discard_out;
+ } else {
+ dst->dev = &loopback_dev;
+ dev_hold(&loopback_dev);
+ dev_put(dev);
+ if (dst->neighbour && dst->neighbour->dev == dev) {
+ dst->neighbour->dev = &loopback_dev;
+ dev_put(dev);
+ dev_hold(&loopback_dev);
+ }
+ }
+}
+
+static int dst_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+ struct net_device *dev = ptr;
+ struct dst_entry *dst;
+
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ case NETDEV_DOWN:
+ spin_lock_bh(&dst_lock);
+ for (dst = dst_garbage_list; dst; dst = dst->next) {
+ dst_ifdown(dst, dev, event != NETDEV_DOWN);
+ }
+ spin_unlock_bh(&dst_lock);
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block dst_dev_notifier = {
+ .notifier_call = dst_dev_event,
+};
+
+void __init dst_init(void)
+{
+ register_netdevice_notifier(&dst_dev_notifier);
+}
+
+EXPORT_SYMBOL(__dst_free);
+EXPORT_SYMBOL(dst_alloc);
+EXPORT_SYMBOL(dst_destroy);
diff --git a/net/core/dv.c b/net/core/dv.c
new file mode 100644
index 0000000..3f25f4a
--- /dev/null
+++ b/net/core/dv.c
@@ -0,0 +1,548 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Generic frame diversion
+ *
+ * Authors:
+ * Benoit LOCHER: initial integration within the kernel with support for ethernet
+ * Dave Miller: improvement on the code (correctness, performance and source files)
+ *
+ */
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/ip.h>
+#include <linux/udp.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <net/dst.h>
+#include <net/arp.h>
+#include <net/sock.h>
+#include <net/ipv6.h>
+#include <net/ip.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/checksum.h>
+#include <linux/divert.h>
+#include <linux/sockios.h>
+
+const char sysctl_divert_version[32]="0.46"; /* Current version */
+
+static int __init dv_init(void)
+{
+ return 0;
+}
+module_init(dv_init);
+
+/*
+ * Allocate a divert_blk for a device. This must be an ethernet nic.
+ */
+int alloc_divert_blk(struct net_device *dev)
+{
+ int alloc_size = (sizeof(struct divert_blk) + 3) & ~3;
+
+ dev->divert = NULL;
+ if (dev->type == ARPHRD_ETHER) {
+ dev->divert = (struct divert_blk *)
+ kmalloc(alloc_size, GFP_KERNEL);
+ if (dev->divert == NULL) {
+ printk(KERN_INFO "divert: unable to allocate divert_blk for %s\n",
+ dev->name);
+ return -ENOMEM;
+ }
+
+ memset(dev->divert, 0, sizeof(struct divert_blk));
+ dev_hold(dev);
+ }
+
+ return 0;
+}
+
+/*
+ * Free a divert_blk allocated by the above function, if it was
+ * allocated on that device.
+ */
+void free_divert_blk(struct net_device *dev)
+{
+ if (dev->divert) {
+ kfree(dev->divert);
+ dev->divert=NULL;
+ dev_put(dev);
+ }
+}
+
+/*
+ * Adds a tcp/udp (source or dest) port to an array
+ */
+static int add_port(u16 ports[], u16 port)
+{
+ int i;
+
+ if (port == 0)
+ return -EINVAL;
+
+ /* Storing directly in network format for performance,
+ * thanks Dave :)
+ */
+ port = htons(port);
+
+ for (i = 0; i < MAX_DIVERT_PORTS; i++) {
+ if (ports[i] == port)
+ return -EALREADY;
+ }
+
+ for (i = 0; i < MAX_DIVERT_PORTS; i++) {
+ if (ports[i] == 0) {
+ ports[i] = port;
+ return 0;
+ }
+ }
+
+ return -ENOBUFS;
+}
+
+/*
+ * Removes a port from an array tcp/udp (source or dest)
+ */
+static int remove_port(u16 ports[], u16 port)
+{
+ int i;
+
+ if (port == 0)
+ return -EINVAL;
+
+ /* Storing directly in network format for performance,
+ * thanks Dave !
+ */
+ port = htons(port);
+
+ for (i = 0; i < MAX_DIVERT_PORTS; i++) {
+ if (ports[i] == port) {
+ ports[i] = 0;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+/* Some basic sanity checks on the arguments passed to divert_ioctl() */
+static int check_args(struct divert_cf *div_cf, struct net_device **dev)
+{
+ char devname[32];
+ int ret;
+
+ if (dev == NULL)
+ return -EFAULT;
+
+ /* GETVERSION: all other args are unused */
+ if (div_cf->cmd == DIVCMD_GETVERSION)
+ return 0;
+
+ /* Network device index should reasonably be between 0 and 1000 :) */
+ if (div_cf->dev_index < 0 || div_cf->dev_index > 1000)
+ return -EINVAL;
+
+ /* Let's try to find the ifname */
+ sprintf(devname, "eth%d", div_cf->dev_index);
+ *dev = dev_get_by_name(devname);
+
+ /* dev should NOT be null */
+ if (*dev == NULL)
+ return -EINVAL;
+
+ ret = 0;
+
+ /* user issuing the ioctl must be a super one :) */
+ if (!capable(CAP_SYS_ADMIN)) {
+ ret = -EPERM;
+ goto out;
+ }
+
+ /* Device must have a divert_blk member NOT null */
+ if ((*dev)->divert == NULL)
+ ret = -EINVAL;
+out:
+ dev_put(*dev);
+ return ret;
+}
+
+/*
+ * control function of the diverter
+ */
+#if 0
+#define DVDBG(a) \
+ printk(KERN_DEBUG "divert_ioctl() line %d %s\n", __LINE__, (a))
+#else
+#define DVDBG(a)
+#endif
+
+int divert_ioctl(unsigned int cmd, struct divert_cf __user *arg)
+{
+ struct divert_cf div_cf;
+ struct divert_blk *div_blk;
+ struct net_device *dev;
+ int ret;
+
+ switch (cmd) {
+ case SIOCGIFDIVERT:
+ DVDBG("SIOCGIFDIVERT, copy_from_user");
+ if (copy_from_user(&div_cf, arg, sizeof(struct divert_cf)))
+ return -EFAULT;
+ DVDBG("before check_args");
+ ret = check_args(&div_cf, &dev);
+ if (ret)
+ return ret;
+ DVDBG("after checkargs");
+ div_blk = dev->divert;
+
+ DVDBG("befre switch()");
+ switch (div_cf.cmd) {
+ case DIVCMD_GETSTATUS:
+ /* Now, just give the user the raw divert block
+ * for him to play with :)
+ */
+ if (copy_to_user(div_cf.arg1.ptr, dev->divert,
+ sizeof(struct divert_blk)))
+ return -EFAULT;
+ break;
+
+ case DIVCMD_GETVERSION:
+ DVDBG("GETVERSION: checking ptr");
+ if (div_cf.arg1.ptr == NULL)
+ return -EINVAL;
+ DVDBG("GETVERSION: copying data to userland");
+ if (copy_to_user(div_cf.arg1.ptr,
+ sysctl_divert_version, 32))
+ return -EFAULT;
+ DVDBG("GETVERSION: data copied");
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case SIOCSIFDIVERT:
+ if (copy_from_user(&div_cf, arg, sizeof(struct divert_cf)))
+ return -EFAULT;
+
+ ret = check_args(&div_cf, &dev);
+ if (ret)
+ return ret;
+
+ div_blk = dev->divert;
+
+ switch(div_cf.cmd) {
+ case DIVCMD_RESET:
+ div_blk->divert = 0;
+ div_blk->protos = DIVERT_PROTO_NONE;
+ memset(div_blk->tcp_dst, 0,
+ MAX_DIVERT_PORTS * sizeof(u16));
+ memset(div_blk->tcp_src, 0,
+ MAX_DIVERT_PORTS * sizeof(u16));
+ memset(div_blk->udp_dst, 0,
+ MAX_DIVERT_PORTS * sizeof(u16));
+ memset(div_blk->udp_src, 0,
+ MAX_DIVERT_PORTS * sizeof(u16));
+ return 0;
+
+ case DIVCMD_DIVERT:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ENABLE:
+ if (div_blk->divert)
+ return -EALREADY;
+ div_blk->divert = 1;
+ break;
+
+ case DIVARG1_DISABLE:
+ if (!div_blk->divert)
+ return -EALREADY;
+ div_blk->divert = 0;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case DIVCMD_IP:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ENABLE:
+ if (div_blk->protos & DIVERT_PROTO_IP)
+ return -EALREADY;
+ div_blk->protos |= DIVERT_PROTO_IP;
+ break;
+
+ case DIVARG1_DISABLE:
+ if (!(div_blk->protos & DIVERT_PROTO_IP))
+ return -EALREADY;
+ div_blk->protos &= ~DIVERT_PROTO_IP;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case DIVCMD_TCP:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ENABLE:
+ if (div_blk->protos & DIVERT_PROTO_TCP)
+ return -EALREADY;
+ div_blk->protos |= DIVERT_PROTO_TCP;
+ break;
+
+ case DIVARG1_DISABLE:
+ if (!(div_blk->protos & DIVERT_PROTO_TCP))
+ return -EALREADY;
+ div_blk->protos &= ~DIVERT_PROTO_TCP;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case DIVCMD_TCPDST:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ADD:
+ return add_port(div_blk->tcp_dst,
+ div_cf.arg2.uint16);
+
+ case DIVARG1_REMOVE:
+ return remove_port(div_blk->tcp_dst,
+ div_cf.arg2.uint16);
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case DIVCMD_TCPSRC:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ADD:
+ return add_port(div_blk->tcp_src,
+ div_cf.arg2.uint16);
+
+ case DIVARG1_REMOVE:
+ return remove_port(div_blk->tcp_src,
+ div_cf.arg2.uint16);
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case DIVCMD_UDP:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ENABLE:
+ if (div_blk->protos & DIVERT_PROTO_UDP)
+ return -EALREADY;
+ div_blk->protos |= DIVERT_PROTO_UDP;
+ break;
+
+ case DIVARG1_DISABLE:
+ if (!(div_blk->protos & DIVERT_PROTO_UDP))
+ return -EALREADY;
+ div_blk->protos &= ~DIVERT_PROTO_UDP;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case DIVCMD_UDPDST:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ADD:
+ return add_port(div_blk->udp_dst,
+ div_cf.arg2.uint16);
+
+ case DIVARG1_REMOVE:
+ return remove_port(div_blk->udp_dst,
+ div_cf.arg2.uint16);
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case DIVCMD_UDPSRC:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ADD:
+ return add_port(div_blk->udp_src,
+ div_cf.arg2.uint16);
+
+ case DIVARG1_REMOVE:
+ return remove_port(div_blk->udp_src,
+ div_cf.arg2.uint16);
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ case DIVCMD_ICMP:
+ switch(div_cf.arg1.int32) {
+ case DIVARG1_ENABLE:
+ if (div_blk->protos & DIVERT_PROTO_ICMP)
+ return -EALREADY;
+ div_blk->protos |= DIVERT_PROTO_ICMP;
+ break;
+
+ case DIVARG1_DISABLE:
+ if (!(div_blk->protos & DIVERT_PROTO_ICMP))
+ return -EALREADY;
+ div_blk->protos &= ~DIVERT_PROTO_ICMP;
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Check if packet should have its dest mac address set to the box itself
+ * for diversion
+ */
+
+#define ETH_DIVERT_FRAME(skb) \
+ memcpy(eth_hdr(skb), skb->dev->dev_addr, ETH_ALEN); \
+ skb->pkt_type=PACKET_HOST
+
+void divert_frame(struct sk_buff *skb)
+{
+ struct ethhdr *eth = eth_hdr(skb);
+ struct iphdr *iph;
+ struct tcphdr *tcph;
+ struct udphdr *udph;
+ struct divert_blk *divert = skb->dev->divert;
+ int i, src, dst;
+ unsigned char *skb_data_end = skb->data + skb->len;
+
+ /* Packet is already aimed at us, return */
+ if (!memcmp(eth, skb->dev->dev_addr, ETH_ALEN))
+ return;
+
+ /* proto is not IP, do nothing */
+ if (eth->h_proto != htons(ETH_P_IP))
+ return;
+
+ /* Divert all IP frames ? */
+ if (divert->protos & DIVERT_PROTO_IP) {
+ ETH_DIVERT_FRAME(skb);
+ return;
+ }
+
+ /* Check for possible (maliciously) malformed IP frame (thanks Dave) */
+ iph = (struct iphdr *) skb->data;
+ if (((iph->ihl<<2)+(unsigned char*)(iph)) >= skb_data_end) {
+ printk(KERN_INFO "divert: malformed IP packet !\n");
+ return;
+ }
+
+ switch (iph->protocol) {
+ /* Divert all ICMP frames ? */
+ case IPPROTO_ICMP:
+ if (divert->protos & DIVERT_PROTO_ICMP) {
+ ETH_DIVERT_FRAME(skb);
+ return;
+ }
+ break;
+
+ /* Divert all TCP frames ? */
+ case IPPROTO_TCP:
+ if (divert->protos & DIVERT_PROTO_TCP) {
+ ETH_DIVERT_FRAME(skb);
+ return;
+ }
+
+ /* Check for possible (maliciously) malformed IP
+ * frame (thanx Dave)
+ */
+ tcph = (struct tcphdr *)
+ (((unsigned char *)iph) + (iph->ihl<<2));
+ if (((unsigned char *)(tcph+1)) >= skb_data_end) {
+ printk(KERN_INFO "divert: malformed TCP packet !\n");
+ return;
+ }
+
+ /* Divert some tcp dst/src ports only ?*/
+ for (i = 0; i < MAX_DIVERT_PORTS; i++) {
+ dst = divert->tcp_dst[i];
+ src = divert->tcp_src[i];
+ if ((dst && dst == tcph->dest) ||
+ (src && src == tcph->source)) {
+ ETH_DIVERT_FRAME(skb);
+ return;
+ }
+ }
+ break;
+
+ /* Divert all UDP frames ? */
+ case IPPROTO_UDP:
+ if (divert->protos & DIVERT_PROTO_UDP) {
+ ETH_DIVERT_FRAME(skb);
+ return;
+ }
+
+ /* Check for possible (maliciously) malformed IP
+ * packet (thanks Dave)
+ */
+ udph = (struct udphdr *)
+ (((unsigned char *)iph) + (iph->ihl<<2));
+ if (((unsigned char *)(udph+1)) >= skb_data_end) {
+ printk(KERN_INFO
+ "divert: malformed UDP packet !\n");
+ return;
+ }
+
+ /* Divert some udp dst/src ports only ? */
+ for (i = 0; i < MAX_DIVERT_PORTS; i++) {
+ dst = divert->udp_dst[i];
+ src = divert->udp_src[i];
+ if ((dst && dst == udph->dest) ||
+ (src && src == udph->source)) {
+ ETH_DIVERT_FRAME(skb);
+ return;
+ }
+ }
+ break;
+ }
+}
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
new file mode 100644
index 0000000..f05fde9
--- /dev/null
+++ b/net/core/ethtool.c
@@ -0,0 +1,819 @@
+/*
+ * net/core/ethtool.c - Ethtool ioctl handler
+ * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
+ *
+ * This file is where we call all the ethtool_ops commands to get
+ * the information ethtool needs. We fall back to calling do_ioctl()
+ * for drivers which haven't been converted to ethtool_ops yet.
+ *
+ * It's GPL, stupid.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/ethtool.h>
+#include <linux/netdevice.h>
+#include <asm/uaccess.h>
+
+/*
+ * Some useful ethtool_ops methods that're device independent.
+ * If we find that all drivers want to do the same thing here,
+ * we can turn these into dev_() function calls.
+ */
+
+u32 ethtool_op_get_link(struct net_device *dev)
+{
+ return netif_carrier_ok(dev) ? 1 : 0;
+}
+
+u32 ethtool_op_get_tx_csum(struct net_device *dev)
+{
+ return (dev->features & NETIF_F_IP_CSUM) != 0;
+}
+
+int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
+{
+ if (data)
+ dev->features |= NETIF_F_IP_CSUM;
+ else
+ dev->features &= ~NETIF_F_IP_CSUM;
+
+ return 0;
+}
+
+u32 ethtool_op_get_sg(struct net_device *dev)
+{
+ return (dev->features & NETIF_F_SG) != 0;
+}
+
+int ethtool_op_set_sg(struct net_device *dev, u32 data)
+{
+ if (data)
+ dev->features |= NETIF_F_SG;
+ else
+ dev->features &= ~NETIF_F_SG;
+
+ return 0;
+}
+
+u32 ethtool_op_get_tso(struct net_device *dev)
+{
+ return (dev->features & NETIF_F_TSO) != 0;
+}
+
+int ethtool_op_set_tso(struct net_device *dev, u32 data)
+{
+ if (data)
+ dev->features |= NETIF_F_TSO;
+ else
+ dev->features &= ~NETIF_F_TSO;
+
+ return 0;
+}
+
+/* Handlers for each ethtool command */
+
+static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_cmd cmd = { ETHTOOL_GSET };
+ int err;
+
+ if (!dev->ethtool_ops->get_settings)
+ return -EOPNOTSUPP;
+
+ err = dev->ethtool_ops->get_settings(dev, &cmd);
+ if (err < 0)
+ return err;
+
+ if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_cmd cmd;
+
+ if (!dev->ethtool_ops->set_settings)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_settings(dev, &cmd);
+}
+
+static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_drvinfo info;
+ struct ethtool_ops *ops = dev->ethtool_ops;
+
+ if (!ops->get_drvinfo)
+ return -EOPNOTSUPP;
+
+ memset(&info, 0, sizeof(info));
+ info.cmd = ETHTOOL_GDRVINFO;
+ ops->get_drvinfo(dev, &info);
+
+ if (ops->self_test_count)
+ info.testinfo_len = ops->self_test_count(dev);
+ if (ops->get_stats_count)
+ info.n_stats = ops->get_stats_count(dev);
+ if (ops->get_regs_len)
+ info.regdump_len = ops->get_regs_len(dev);
+ if (ops->get_eeprom_len)
+ info.eedump_len = ops->get_eeprom_len(dev);
+
+ if (copy_to_user(useraddr, &info, sizeof(info)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_regs regs;
+ struct ethtool_ops *ops = dev->ethtool_ops;
+ void *regbuf;
+ int reglen, ret;
+
+ if (!ops->get_regs || !ops->get_regs_len)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(®s, useraddr, sizeof(regs)))
+ return -EFAULT;
+
+ reglen = ops->get_regs_len(dev);
+ if (regs.len > reglen)
+ regs.len = reglen;
+
+ regbuf = kmalloc(reglen, GFP_USER);
+ if (!regbuf)
+ return -ENOMEM;
+
+ ops->get_regs(dev, ®s, regbuf);
+
+ ret = -EFAULT;
+ if (copy_to_user(useraddr, ®s, sizeof(regs)))
+ goto out;
+ useraddr += offsetof(struct ethtool_regs, data);
+ if (copy_to_user(useraddr, regbuf, regs.len))
+ goto out;
+ ret = 0;
+
+ out:
+ kfree(regbuf);
+ return ret;
+}
+
+static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
+
+ if (!dev->ethtool_ops->get_wol)
+ return -EOPNOTSUPP;
+
+ dev->ethtool_ops->get_wol(dev, &wol);
+
+ if (copy_to_user(useraddr, &wol, sizeof(wol)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_wolinfo wol;
+
+ if (!dev->ethtool_ops->set_wol)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&wol, useraddr, sizeof(wol)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_wol(dev, &wol);
+}
+
+static int ethtool_get_msglevel(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata = { ETHTOOL_GMSGLVL };
+
+ if (!dev->ethtool_ops->get_msglevel)
+ return -EOPNOTSUPP;
+
+ edata.data = dev->ethtool_ops->get_msglevel(dev);
+
+ if (copy_to_user(useraddr, &edata, sizeof(edata)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_msglevel(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata;
+
+ if (!dev->ethtool_ops->set_msglevel)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&edata, useraddr, sizeof(edata)))
+ return -EFAULT;
+
+ dev->ethtool_ops->set_msglevel(dev, edata.data);
+ return 0;
+}
+
+static int ethtool_nway_reset(struct net_device *dev)
+{
+ if (!dev->ethtool_ops->nway_reset)
+ return -EOPNOTSUPP;
+
+ return dev->ethtool_ops->nway_reset(dev);
+}
+
+static int ethtool_get_link(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_value edata = { ETHTOOL_GLINK };
+
+ if (!dev->ethtool_ops->get_link)
+ return -EOPNOTSUPP;
+
+ edata.data = dev->ethtool_ops->get_link(dev);
+
+ if (copy_to_user(useraddr, &edata, sizeof(edata)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_eeprom eeprom;
+ struct ethtool_ops *ops = dev->ethtool_ops;
+ u8 *data;
+ int ret;
+
+ if (!ops->get_eeprom || !ops->get_eeprom_len)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
+ return -EFAULT;
+
+ /* Check for wrap and zero */
+ if (eeprom.offset + eeprom.len <= eeprom.offset)
+ return -EINVAL;
+
+ /* Check for exceeding total eeprom len */
+ if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
+ return -EINVAL;
+
+ data = kmalloc(eeprom.len, GFP_USER);
+ if (!data)
+ return -ENOMEM;
+
+ ret = -EFAULT;
+ if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
+ goto out;
+
+ ret = ops->get_eeprom(dev, &eeprom, data);
+ if (ret)
+ goto out;
+
+ ret = -EFAULT;
+ if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
+ goto out;
+ if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
+ goto out;
+ ret = 0;
+
+ out:
+ kfree(data);
+ return ret;
+}
+
+static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_eeprom eeprom;
+ struct ethtool_ops *ops = dev->ethtool_ops;
+ u8 *data;
+ int ret;
+
+ if (!ops->set_eeprom || !ops->get_eeprom_len)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
+ return -EFAULT;
+
+ /* Check for wrap and zero */
+ if (eeprom.offset + eeprom.len <= eeprom.offset)
+ return -EINVAL;
+
+ /* Check for exceeding total eeprom len */
+ if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
+ return -EINVAL;
+
+ data = kmalloc(eeprom.len, GFP_USER);
+ if (!data)
+ return -ENOMEM;
+
+ ret = -EFAULT;
+ if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
+ goto out;
+
+ ret = ops->set_eeprom(dev, &eeprom, data);
+ if (ret)
+ goto out;
+
+ if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
+ ret = -EFAULT;
+
+ out:
+ kfree(data);
+ return ret;
+}
+
+static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
+
+ if (!dev->ethtool_ops->get_coalesce)
+ return -EOPNOTSUPP;
+
+ dev->ethtool_ops->get_coalesce(dev, &coalesce);
+
+ if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_coalesce coalesce;
+
+ if (!dev->ethtool_ops->get_coalesce)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_coalesce(dev, &coalesce);
+}
+
+static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
+
+ if (!dev->ethtool_ops->get_ringparam)
+ return -EOPNOTSUPP;
+
+ dev->ethtool_ops->get_ringparam(dev, &ringparam);
+
+ if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_ringparam ringparam;
+
+ if (!dev->ethtool_ops->set_ringparam)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_ringparam(dev, &ringparam);
+}
+
+static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
+
+ if (!dev->ethtool_ops->get_pauseparam)
+ return -EOPNOTSUPP;
+
+ dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
+
+ if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_pauseparam pauseparam;
+
+ if (!dev->ethtool_ops->get_pauseparam)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
+}
+
+static int ethtool_get_rx_csum(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata = { ETHTOOL_GRXCSUM };
+
+ if (!dev->ethtool_ops->get_rx_csum)
+ return -EOPNOTSUPP;
+
+ edata.data = dev->ethtool_ops->get_rx_csum(dev);
+
+ if (copy_to_user(useraddr, &edata, sizeof(edata)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata;
+
+ if (!dev->ethtool_ops->set_rx_csum)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&edata, useraddr, sizeof(edata)))
+ return -EFAULT;
+
+ dev->ethtool_ops->set_rx_csum(dev, edata.data);
+ return 0;
+}
+
+static int ethtool_get_tx_csum(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata = { ETHTOOL_GTXCSUM };
+
+ if (!dev->ethtool_ops->get_tx_csum)
+ return -EOPNOTSUPP;
+
+ edata.data = dev->ethtool_ops->get_tx_csum(dev);
+
+ if (copy_to_user(useraddr, &edata, sizeof(edata)))
+ return -EFAULT;
+ return 0;
+}
+
+static int __ethtool_set_sg(struct net_device *dev, u32 data)
+{
+ int err;
+
+ if (!data && dev->ethtool_ops->set_tso) {
+ err = dev->ethtool_ops->set_tso(dev, 0);
+ if (err)
+ return err;
+ }
+
+ return dev->ethtool_ops->set_sg(dev, data);
+}
+
+static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata;
+ int err;
+
+ if (!dev->ethtool_ops->set_tx_csum)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&edata, useraddr, sizeof(edata)))
+ return -EFAULT;
+
+ if (!edata.data && dev->ethtool_ops->set_sg) {
+ err = __ethtool_set_sg(dev, 0);
+ if (err)
+ return err;
+ }
+
+ return dev->ethtool_ops->set_tx_csum(dev, edata.data);
+}
+
+static int ethtool_get_sg(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata = { ETHTOOL_GSG };
+
+ if (!dev->ethtool_ops->get_sg)
+ return -EOPNOTSUPP;
+
+ edata.data = dev->ethtool_ops->get_sg(dev);
+
+ if (copy_to_user(useraddr, &edata, sizeof(edata)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata;
+
+ if (!dev->ethtool_ops->set_sg)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&edata, useraddr, sizeof(edata)))
+ return -EFAULT;
+
+ if (edata.data &&
+ !(dev->features & (NETIF_F_IP_CSUM |
+ NETIF_F_NO_CSUM |
+ NETIF_F_HW_CSUM)))
+ return -EINVAL;
+
+ return __ethtool_set_sg(dev, edata.data);
+}
+
+static int ethtool_get_tso(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata = { ETHTOOL_GTSO };
+
+ if (!dev->ethtool_ops->get_tso)
+ return -EOPNOTSUPP;
+
+ edata.data = dev->ethtool_ops->get_tso(dev);
+
+ if (copy_to_user(useraddr, &edata, sizeof(edata)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_value edata;
+
+ if (!dev->ethtool_ops->set_tso)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&edata, useraddr, sizeof(edata)))
+ return -EFAULT;
+
+ if (edata.data && !(dev->features & NETIF_F_SG))
+ return -EINVAL;
+
+ return dev->ethtool_ops->set_tso(dev, edata.data);
+}
+
+static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
+{
+ struct ethtool_test test;
+ struct ethtool_ops *ops = dev->ethtool_ops;
+ u64 *data;
+ int ret;
+
+ if (!ops->self_test || !ops->self_test_count)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&test, useraddr, sizeof(test)))
+ return -EFAULT;
+
+ test.len = ops->self_test_count(dev);
+ data = kmalloc(test.len * sizeof(u64), GFP_USER);
+ if (!data)
+ return -ENOMEM;
+
+ ops->self_test(dev, &test, data);
+
+ ret = -EFAULT;
+ if (copy_to_user(useraddr, &test, sizeof(test)))
+ goto out;
+ useraddr += sizeof(test);
+ if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
+ goto out;
+ ret = 0;
+
+ out:
+ kfree(data);
+ return ret;
+}
+
+static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_gstrings gstrings;
+ struct ethtool_ops *ops = dev->ethtool_ops;
+ u8 *data;
+ int ret;
+
+ if (!ops->get_strings)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
+ return -EFAULT;
+
+ switch (gstrings.string_set) {
+ case ETH_SS_TEST:
+ if (!ops->self_test_count)
+ return -EOPNOTSUPP;
+ gstrings.len = ops->self_test_count(dev);
+ break;
+ case ETH_SS_STATS:
+ if (!ops->get_stats_count)
+ return -EOPNOTSUPP;
+ gstrings.len = ops->get_stats_count(dev);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
+ if (!data)
+ return -ENOMEM;
+
+ ops->get_strings(dev, gstrings.string_set, data);
+
+ ret = -EFAULT;
+ if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
+ goto out;
+ useraddr += sizeof(gstrings);
+ if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
+ goto out;
+ ret = 0;
+
+ out:
+ kfree(data);
+ return ret;
+}
+
+static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_value id;
+
+ if (!dev->ethtool_ops->phys_id)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&id, useraddr, sizeof(id)))
+ return -EFAULT;
+
+ return dev->ethtool_ops->phys_id(dev, id.data);
+}
+
+static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
+{
+ struct ethtool_stats stats;
+ struct ethtool_ops *ops = dev->ethtool_ops;
+ u64 *data;
+ int ret;
+
+ if (!ops->get_ethtool_stats || !ops->get_stats_count)
+ return -EOPNOTSUPP;
+
+ if (copy_from_user(&stats, useraddr, sizeof(stats)))
+ return -EFAULT;
+
+ stats.n_stats = ops->get_stats_count(dev);
+ data = kmalloc(stats.n_stats * sizeof(u64), GFP_USER);
+ if (!data)
+ return -ENOMEM;
+
+ ops->get_ethtool_stats(dev, &stats, data);
+
+ ret = -EFAULT;
+ if (copy_to_user(useraddr, &stats, sizeof(stats)))
+ goto out;
+ useraddr += sizeof(stats);
+ if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
+ goto out;
+ ret = 0;
+
+ out:
+ kfree(data);
+ return ret;
+}
+
+/* The main entry point in this file. Called from net/core/dev.c */
+
+int dev_ethtool(struct ifreq *ifr)
+{
+ struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
+ void __user *useraddr = ifr->ifr_data;
+ u32 ethcmd;
+ int rc;
+
+ /*
+ * XXX: This can be pushed down into the ethtool_* handlers that
+ * need it. Keep existing behaviour for the moment.
+ */
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (!dev || !netif_device_present(dev))
+ return -ENODEV;
+
+ if (!dev->ethtool_ops)
+ goto ioctl;
+
+ if (copy_from_user(ðcmd, useraddr, sizeof (ethcmd)))
+ return -EFAULT;
+
+ if(dev->ethtool_ops->begin)
+ if ((rc = dev->ethtool_ops->begin(dev)) < 0)
+ return rc;
+
+ switch (ethcmd) {
+ case ETHTOOL_GSET:
+ rc = ethtool_get_settings(dev, useraddr);
+ break;
+ case ETHTOOL_SSET:
+ rc = ethtool_set_settings(dev, useraddr);
+ break;
+ case ETHTOOL_GDRVINFO:
+ rc = ethtool_get_drvinfo(dev, useraddr);
+
+ break;
+ case ETHTOOL_GREGS:
+ rc = ethtool_get_regs(dev, useraddr);
+ break;
+ case ETHTOOL_GWOL:
+ rc = ethtool_get_wol(dev, useraddr);
+ break;
+ case ETHTOOL_SWOL:
+ rc = ethtool_set_wol(dev, useraddr);
+ break;
+ case ETHTOOL_GMSGLVL:
+ rc = ethtool_get_msglevel(dev, useraddr);
+ break;
+ case ETHTOOL_SMSGLVL:
+ rc = ethtool_set_msglevel(dev, useraddr);
+ break;
+ case ETHTOOL_NWAY_RST:
+ rc = ethtool_nway_reset(dev);
+ break;
+ case ETHTOOL_GLINK:
+ rc = ethtool_get_link(dev, useraddr);
+ break;
+ case ETHTOOL_GEEPROM:
+ rc = ethtool_get_eeprom(dev, useraddr);
+ break;
+ case ETHTOOL_SEEPROM:
+ rc = ethtool_set_eeprom(dev, useraddr);
+ break;
+ case ETHTOOL_GCOALESCE:
+ rc = ethtool_get_coalesce(dev, useraddr);
+ break;
+ case ETHTOOL_SCOALESCE:
+ rc = ethtool_set_coalesce(dev, useraddr);
+ break;
+ case ETHTOOL_GRINGPARAM:
+ rc = ethtool_get_ringparam(dev, useraddr);
+ break;
+ case ETHTOOL_SRINGPARAM:
+ rc = ethtool_set_ringparam(dev, useraddr);
+ break;
+ case ETHTOOL_GPAUSEPARAM:
+ rc = ethtool_get_pauseparam(dev, useraddr);
+ break;
+ case ETHTOOL_SPAUSEPARAM:
+ rc = ethtool_set_pauseparam(dev, useraddr);
+ break;
+ case ETHTOOL_GRXCSUM:
+ rc = ethtool_get_rx_csum(dev, useraddr);
+ break;
+ case ETHTOOL_SRXCSUM:
+ rc = ethtool_set_rx_csum(dev, useraddr);
+ break;
+ case ETHTOOL_GTXCSUM:
+ rc = ethtool_get_tx_csum(dev, useraddr);
+ break;
+ case ETHTOOL_STXCSUM:
+ rc = ethtool_set_tx_csum(dev, useraddr);
+ break;
+ case ETHTOOL_GSG:
+ rc = ethtool_get_sg(dev, useraddr);
+ break;
+ case ETHTOOL_SSG:
+ rc = ethtool_set_sg(dev, useraddr);
+ break;
+ case ETHTOOL_GTSO:
+ rc = ethtool_get_tso(dev, useraddr);
+ break;
+ case ETHTOOL_STSO:
+ rc = ethtool_set_tso(dev, useraddr);
+ break;
+ case ETHTOOL_TEST:
+ rc = ethtool_self_test(dev, useraddr);
+ break;
+ case ETHTOOL_GSTRINGS:
+ rc = ethtool_get_strings(dev, useraddr);
+ break;
+ case ETHTOOL_PHYS_ID:
+ rc = ethtool_phys_id(dev, useraddr);
+ break;
+ case ETHTOOL_GSTATS:
+ rc = ethtool_get_stats(dev, useraddr);
+ break;
+ default:
+ rc = -EOPNOTSUPP;
+ }
+
+ if(dev->ethtool_ops->complete)
+ dev->ethtool_ops->complete(dev);
+ return rc;
+
+ ioctl:
+ if (dev->do_ioctl)
+ return dev->do_ioctl(dev, ifr, SIOCETHTOOL);
+ return -EOPNOTSUPP;
+}
+
+EXPORT_SYMBOL(dev_ethtool);
+EXPORT_SYMBOL(ethtool_op_get_link);
+EXPORT_SYMBOL(ethtool_op_get_sg);
+EXPORT_SYMBOL(ethtool_op_get_tso);
+EXPORT_SYMBOL(ethtool_op_get_tx_csum);
+EXPORT_SYMBOL(ethtool_op_set_sg);
+EXPORT_SYMBOL(ethtool_op_set_tso);
+EXPORT_SYMBOL(ethtool_op_set_tx_csum);
diff --git a/net/core/filter.c b/net/core/filter.c
new file mode 100644
index 0000000..f3b8820
--- /dev/null
+++ b/net/core/filter.c
@@ -0,0 +1,432 @@
+/*
+ * Linux Socket Filter - Kernel level socket filtering
+ *
+ * Author:
+ * Jay Schulist <jschlst@samba.org>
+ *
+ * Based on the design of:
+ * - The Berkeley Packet Filter
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Andi Kleen - Fix a few bad bugs and races.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/fcntl.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/if_packet.h>
+#include <net/ip.h>
+#include <net/protocol.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/errno.h>
+#include <linux/timer.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+#include <linux/filter.h>
+
+/* No hurry in this branch */
+static u8 *load_pointer(struct sk_buff *skb, int k)
+{
+ u8 *ptr = NULL;
+
+ if (k >= SKF_NET_OFF)
+ ptr = skb->nh.raw + k - SKF_NET_OFF;
+ else if (k >= SKF_LL_OFF)
+ ptr = skb->mac.raw + k - SKF_LL_OFF;
+
+ if (ptr >= skb->head && ptr < skb->tail)
+ return ptr;
+ return NULL;
+}
+
+/**
+ * sk_run_filter - run a filter on a socket
+ * @skb: buffer to run the filter on
+ * @filter: filter to apply
+ * @flen: length of filter
+ *
+ * Decode and apply filter instructions to the skb->data.
+ * Return length to keep, 0 for none. skb is the data we are
+ * filtering, filter is the array of filter instructions, and
+ * len is the number of filter blocks in the array.
+ */
+
+int sk_run_filter(struct sk_buff *skb, struct sock_filter *filter, int flen)
+{
+ unsigned char *data = skb->data;
+ /* len is UNSIGNED. Byte wide insns relies only on implicit
+ type casts to prevent reading arbitrary memory locations.
+ */
+ unsigned int len = skb->len-skb->data_len;
+ struct sock_filter *fentry; /* We walk down these */
+ u32 A = 0; /* Accumulator */
+ u32 X = 0; /* Index Register */
+ u32 mem[BPF_MEMWORDS]; /* Scratch Memory Store */
+ int k;
+ int pc;
+
+ /*
+ * Process array of filter instructions.
+ */
+ for (pc = 0; pc < flen; pc++) {
+ fentry = &filter[pc];
+
+ switch (fentry->code) {
+ case BPF_ALU|BPF_ADD|BPF_X:
+ A += X;
+ continue;
+ case BPF_ALU|BPF_ADD|BPF_K:
+ A += fentry->k;
+ continue;
+ case BPF_ALU|BPF_SUB|BPF_X:
+ A -= X;
+ continue;
+ case BPF_ALU|BPF_SUB|BPF_K:
+ A -= fentry->k;
+ continue;
+ case BPF_ALU|BPF_MUL|BPF_X:
+ A *= X;
+ continue;
+ case BPF_ALU|BPF_MUL|BPF_K:
+ A *= fentry->k;
+ continue;
+ case BPF_ALU|BPF_DIV|BPF_X:
+ if (X == 0)
+ return 0;
+ A /= X;
+ continue;
+ case BPF_ALU|BPF_DIV|BPF_K:
+ if (fentry->k == 0)
+ return 0;
+ A /= fentry->k;
+ continue;
+ case BPF_ALU|BPF_AND|BPF_X:
+ A &= X;
+ continue;
+ case BPF_ALU|BPF_AND|BPF_K:
+ A &= fentry->k;
+ continue;
+ case BPF_ALU|BPF_OR|BPF_X:
+ A |= X;
+ continue;
+ case BPF_ALU|BPF_OR|BPF_K:
+ A |= fentry->k;
+ continue;
+ case BPF_ALU|BPF_LSH|BPF_X:
+ A <<= X;
+ continue;
+ case BPF_ALU|BPF_LSH|BPF_K:
+ A <<= fentry->k;
+ continue;
+ case BPF_ALU|BPF_RSH|BPF_X:
+ A >>= X;
+ continue;
+ case BPF_ALU|BPF_RSH|BPF_K:
+ A >>= fentry->k;
+ continue;
+ case BPF_ALU|BPF_NEG:
+ A = -A;
+ continue;
+ case BPF_JMP|BPF_JA:
+ pc += fentry->k;
+ continue;
+ case BPF_JMP|BPF_JGT|BPF_K:
+ pc += (A > fentry->k) ? fentry->jt : fentry->jf;
+ continue;
+ case BPF_JMP|BPF_JGE|BPF_K:
+ pc += (A >= fentry->k) ? fentry->jt : fentry->jf;
+ continue;
+ case BPF_JMP|BPF_JEQ|BPF_K:
+ pc += (A == fentry->k) ? fentry->jt : fentry->jf;
+ continue;
+ case BPF_JMP|BPF_JSET|BPF_K:
+ pc += (A & fentry->k) ? fentry->jt : fentry->jf;
+ continue;
+ case BPF_JMP|BPF_JGT|BPF_X:
+ pc += (A > X) ? fentry->jt : fentry->jf;
+ continue;
+ case BPF_JMP|BPF_JGE|BPF_X:
+ pc += (A >= X) ? fentry->jt : fentry->jf;
+ continue;
+ case BPF_JMP|BPF_JEQ|BPF_X:
+ pc += (A == X) ? fentry->jt : fentry->jf;
+ continue;
+ case BPF_JMP|BPF_JSET|BPF_X:
+ pc += (A & X) ? fentry->jt : fentry->jf;
+ continue;
+ case BPF_LD|BPF_W|BPF_ABS:
+ k = fentry->k;
+ load_w:
+ if (k >= 0 && (unsigned int)(k+sizeof(u32)) <= len) {
+ A = ntohl(*(u32*)&data[k]);
+ continue;
+ }
+ if (k < 0) {
+ u8 *ptr;
+
+ if (k >= SKF_AD_OFF)
+ break;
+ ptr = load_pointer(skb, k);
+ if (ptr) {
+ A = ntohl(*(u32*)ptr);
+ continue;
+ }
+ } else {
+ u32 _tmp, *p;
+ p = skb_header_pointer(skb, k, 4, &_tmp);
+ if (p != NULL) {
+ A = ntohl(*p);
+ continue;
+ }
+ }
+ return 0;
+ case BPF_LD|BPF_H|BPF_ABS:
+ k = fentry->k;
+ load_h:
+ if (k >= 0 && (unsigned int)(k + sizeof(u16)) <= len) {
+ A = ntohs(*(u16*)&data[k]);
+ continue;
+ }
+ if (k < 0) {
+ u8 *ptr;
+
+ if (k >= SKF_AD_OFF)
+ break;
+ ptr = load_pointer(skb, k);
+ if (ptr) {
+ A = ntohs(*(u16*)ptr);
+ continue;
+ }
+ } else {
+ u16 _tmp, *p;
+ p = skb_header_pointer(skb, k, 2, &_tmp);
+ if (p != NULL) {
+ A = ntohs(*p);
+ continue;
+ }
+ }
+ return 0;
+ case BPF_LD|BPF_B|BPF_ABS:
+ k = fentry->k;
+load_b:
+ if (k >= 0 && (unsigned int)k < len) {
+ A = data[k];
+ continue;
+ }
+ if (k < 0) {
+ u8 *ptr;
+
+ if (k >= SKF_AD_OFF)
+ break;
+ ptr = load_pointer(skb, k);
+ if (ptr) {
+ A = *ptr;
+ continue;
+ }
+ } else {
+ u8 _tmp, *p;
+ p = skb_header_pointer(skb, k, 1, &_tmp);
+ if (p != NULL) {
+ A = *p;
+ continue;
+ }
+ }
+ return 0;
+ case BPF_LD|BPF_W|BPF_LEN:
+ A = len;
+ continue;
+ case BPF_LDX|BPF_W|BPF_LEN:
+ X = len;
+ continue;
+ case BPF_LD|BPF_W|BPF_IND:
+ k = X + fentry->k;
+ goto load_w;
+ case BPF_LD|BPF_H|BPF_IND:
+ k = X + fentry->k;
+ goto load_h;
+ case BPF_LD|BPF_B|BPF_IND:
+ k = X + fentry->k;
+ goto load_b;
+ case BPF_LDX|BPF_B|BPF_MSH:
+ if (fentry->k >= len)
+ return 0;
+ X = (data[fentry->k] & 0xf) << 2;
+ continue;
+ case BPF_LD|BPF_IMM:
+ A = fentry->k;
+ continue;
+ case BPF_LDX|BPF_IMM:
+ X = fentry->k;
+ continue;
+ case BPF_LD|BPF_MEM:
+ A = mem[fentry->k];
+ continue;
+ case BPF_LDX|BPF_MEM:
+ X = mem[fentry->k];
+ continue;
+ case BPF_MISC|BPF_TAX:
+ X = A;
+ continue;
+ case BPF_MISC|BPF_TXA:
+ A = X;
+ continue;
+ case BPF_RET|BPF_K:
+ return ((unsigned int)fentry->k);
+ case BPF_RET|BPF_A:
+ return ((unsigned int)A);
+ case BPF_ST:
+ mem[fentry->k] = A;
+ continue;
+ case BPF_STX:
+ mem[fentry->k] = X;
+ continue;
+ default:
+ /* Invalid instruction counts as RET */
+ return 0;
+ }
+
+ /*
+ * Handle ancillary data, which are impossible
+ * (or very difficult) to get parsing packet contents.
+ */
+ switch (k-SKF_AD_OFF) {
+ case SKF_AD_PROTOCOL:
+ A = htons(skb->protocol);
+ continue;
+ case SKF_AD_PKTTYPE:
+ A = skb->pkt_type;
+ continue;
+ case SKF_AD_IFINDEX:
+ A = skb->dev->ifindex;
+ continue;
+ default:
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * sk_chk_filter - verify socket filter code
+ * @filter: filter to verify
+ * @flen: length of filter
+ *
+ * Check the user's filter code. If we let some ugly
+ * filter code slip through kaboom! The filter must contain
+ * no references or jumps that are out of range, no illegal instructions
+ * and no backward jumps. It must end with a RET instruction
+ *
+ * Returns 0 if the rule set is legal or a negative errno code if not.
+ */
+int sk_chk_filter(struct sock_filter *filter, int flen)
+{
+ struct sock_filter *ftest;
+ int pc;
+
+ if (((unsigned int)flen >= (~0U / sizeof(struct sock_filter))) || flen == 0)
+ return -EINVAL;
+
+ /* check the filter code now */
+ for (pc = 0; pc < flen; pc++) {
+ /* all jumps are forward as they are not signed */
+ ftest = &filter[pc];
+ if (BPF_CLASS(ftest->code) == BPF_JMP) {
+ /* but they mustn't jump off the end */
+ if (BPF_OP(ftest->code) == BPF_JA) {
+ /*
+ * Note, the large ftest->k might cause loops.
+ * Compare this with conditional jumps below,
+ * where offsets are limited. --ANK (981016)
+ */
+ if (ftest->k >= (unsigned)(flen-pc-1))
+ return -EINVAL;
+ } else {
+ /* for conditionals both must be safe */
+ if (pc + ftest->jt +1 >= flen ||
+ pc + ftest->jf +1 >= flen)
+ return -EINVAL;
+ }
+ }
+
+ /* check that memory operations use valid addresses. */
+ if (ftest->k >= BPF_MEMWORDS) {
+ /* but it might not be a memory operation... */
+ switch (ftest->code) {
+ case BPF_ST:
+ case BPF_STX:
+ case BPF_LD|BPF_MEM:
+ case BPF_LDX|BPF_MEM:
+ return -EINVAL;
+ }
+ }
+ }
+
+ /*
+ * The program must end with a return. We don't care where they
+ * jumped within the script (its always forwards) but in the end
+ * they _will_ hit this.
+ */
+ return (BPF_CLASS(filter[flen - 1].code) == BPF_RET) ? 0 : -EINVAL;
+}
+
+/**
+ * sk_attach_filter - attach a socket filter
+ * @fprog: the filter program
+ * @sk: the socket to use
+ *
+ * Attach the user's filter code. We first run some sanity checks on
+ * it to make sure it does not explode on us later. If an error
+ * occurs or there is insufficient memory for the filter a negative
+ * errno code is returned. On success the return is zero.
+ */
+int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk)
+{
+ struct sk_filter *fp;
+ unsigned int fsize = sizeof(struct sock_filter) * fprog->len;
+ int err;
+
+ /* Make sure new filter is there and in the right amounts. */
+ if (fprog->filter == NULL || fprog->len > BPF_MAXINSNS)
+ return -EINVAL;
+
+ fp = sock_kmalloc(sk, fsize+sizeof(*fp), GFP_KERNEL);
+ if (!fp)
+ return -ENOMEM;
+ if (copy_from_user(fp->insns, fprog->filter, fsize)) {
+ sock_kfree_s(sk, fp, fsize+sizeof(*fp));
+ return -EFAULT;
+ }
+
+ atomic_set(&fp->refcnt, 1);
+ fp->len = fprog->len;
+
+ err = sk_chk_filter(fp->insns, fp->len);
+ if (!err) {
+ struct sk_filter *old_fp;
+
+ spin_lock_bh(&sk->sk_lock.slock);
+ old_fp = sk->sk_filter;
+ sk->sk_filter = fp;
+ spin_unlock_bh(&sk->sk_lock.slock);
+ fp = old_fp;
+ }
+
+ if (fp)
+ sk_filter_release(sk, fp);
+ return err;
+}
+
+EXPORT_SYMBOL(sk_chk_filter);
+EXPORT_SYMBOL(sk_run_filter);
diff --git a/net/core/flow.c b/net/core/flow.c
new file mode 100644
index 0000000..f289570
--- /dev/null
+++ b/net/core/flow.c
@@ -0,0 +1,371 @@
+/* flow.c: Generic flow cache.
+ *
+ * Copyright (C) 2003 Alexey N. Kuznetsov (kuznet@ms2.inr.ac.ru)
+ * Copyright (C) 2003 David S. Miller (davem@redhat.com)
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/list.h>
+#include <linux/jhash.h>
+#include <linux/interrupt.h>
+#include <linux/mm.h>
+#include <linux/random.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <linux/completion.h>
+#include <linux/percpu.h>
+#include <linux/bitops.h>
+#include <linux/notifier.h>
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <net/flow.h>
+#include <asm/atomic.h>
+#include <asm/semaphore.h>
+
+struct flow_cache_entry {
+ struct flow_cache_entry *next;
+ u16 family;
+ u8 dir;
+ struct flowi key;
+ u32 genid;
+ void *object;
+ atomic_t *object_ref;
+};
+
+atomic_t flow_cache_genid = ATOMIC_INIT(0);
+
+static u32 flow_hash_shift;
+#define flow_hash_size (1 << flow_hash_shift)
+static DEFINE_PER_CPU(struct flow_cache_entry **, flow_tables) = { NULL };
+
+#define flow_table(cpu) (per_cpu(flow_tables, cpu))
+
+static kmem_cache_t *flow_cachep;
+
+static int flow_lwm, flow_hwm;
+
+struct flow_percpu_info {
+ int hash_rnd_recalc;
+ u32 hash_rnd;
+ int count;
+} ____cacheline_aligned;
+static DEFINE_PER_CPU(struct flow_percpu_info, flow_hash_info) = { 0 };
+
+#define flow_hash_rnd_recalc(cpu) \
+ (per_cpu(flow_hash_info, cpu).hash_rnd_recalc)
+#define flow_hash_rnd(cpu) \
+ (per_cpu(flow_hash_info, cpu).hash_rnd)
+#define flow_count(cpu) \
+ (per_cpu(flow_hash_info, cpu).count)
+
+static struct timer_list flow_hash_rnd_timer;
+
+#define FLOW_HASH_RND_PERIOD (10 * 60 * HZ)
+
+struct flow_flush_info {
+ atomic_t cpuleft;
+ struct completion completion;
+};
+static DEFINE_PER_CPU(struct tasklet_struct, flow_flush_tasklets) = { NULL };
+
+#define flow_flush_tasklet(cpu) (&per_cpu(flow_flush_tasklets, cpu))
+
+static void flow_cache_new_hashrnd(unsigned long arg)
+{
+ int i;
+
+ for_each_cpu(i)
+ flow_hash_rnd_recalc(i) = 1;
+
+ flow_hash_rnd_timer.expires = jiffies + FLOW_HASH_RND_PERIOD;
+ add_timer(&flow_hash_rnd_timer);
+}
+
+static void __flow_cache_shrink(int cpu, int shrink_to)
+{
+ struct flow_cache_entry *fle, **flp;
+ int i;
+
+ for (i = 0; i < flow_hash_size; i++) {
+ int k = 0;
+
+ flp = &flow_table(cpu)[i];
+ while ((fle = *flp) != NULL && k < shrink_to) {
+ k++;
+ flp = &fle->next;
+ }
+ while ((fle = *flp) != NULL) {
+ *flp = fle->next;
+ if (fle->object)
+ atomic_dec(fle->object_ref);
+ kmem_cache_free(flow_cachep, fle);
+ flow_count(cpu)--;
+ }
+ }
+}
+
+static void flow_cache_shrink(int cpu)
+{
+ int shrink_to = flow_lwm / flow_hash_size;
+
+ __flow_cache_shrink(cpu, shrink_to);
+}
+
+static void flow_new_hash_rnd(int cpu)
+{
+ get_random_bytes(&flow_hash_rnd(cpu), sizeof(u32));
+ flow_hash_rnd_recalc(cpu) = 0;
+
+ __flow_cache_shrink(cpu, 0);
+}
+
+static u32 flow_hash_code(struct flowi *key, int cpu)
+{
+ u32 *k = (u32 *) key;
+
+ return (jhash2(k, (sizeof(*key) / sizeof(u32)), flow_hash_rnd(cpu)) &
+ (flow_hash_size - 1));
+}
+
+#if (BITS_PER_LONG == 64)
+typedef u64 flow_compare_t;
+#else
+typedef u32 flow_compare_t;
+#endif
+
+extern void flowi_is_missized(void);
+
+/* I hear what you're saying, use memcmp. But memcmp cannot make
+ * important assumptions that we can here, such as alignment and
+ * constant size.
+ */
+static int flow_key_compare(struct flowi *key1, struct flowi *key2)
+{
+ flow_compare_t *k1, *k1_lim, *k2;
+ const int n_elem = sizeof(struct flowi) / sizeof(flow_compare_t);
+
+ if (sizeof(struct flowi) % sizeof(flow_compare_t))
+ flowi_is_missized();
+
+ k1 = (flow_compare_t *) key1;
+ k1_lim = k1 + n_elem;
+
+ k2 = (flow_compare_t *) key2;
+
+ do {
+ if (*k1++ != *k2++)
+ return 1;
+ } while (k1 < k1_lim);
+
+ return 0;
+}
+
+void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
+ flow_resolve_t resolver)
+{
+ struct flow_cache_entry *fle, **head;
+ unsigned int hash;
+ int cpu;
+
+ local_bh_disable();
+ cpu = smp_processor_id();
+
+ fle = NULL;
+ /* Packet really early in init? Making flow_cache_init a
+ * pre-smp initcall would solve this. --RR */
+ if (!flow_table(cpu))
+ goto nocache;
+
+ if (flow_hash_rnd_recalc(cpu))
+ flow_new_hash_rnd(cpu);
+ hash = flow_hash_code(key, cpu);
+
+ head = &flow_table(cpu)[hash];
+ for (fle = *head; fle; fle = fle->next) {
+ if (fle->family == family &&
+ fle->dir == dir &&
+ flow_key_compare(key, &fle->key) == 0) {
+ if (fle->genid == atomic_read(&flow_cache_genid)) {
+ void *ret = fle->object;
+
+ if (ret)
+ atomic_inc(fle->object_ref);
+ local_bh_enable();
+
+ return ret;
+ }
+ break;
+ }
+ }
+
+ if (!fle) {
+ if (flow_count(cpu) > flow_hwm)
+ flow_cache_shrink(cpu);
+
+ fle = kmem_cache_alloc(flow_cachep, SLAB_ATOMIC);
+ if (fle) {
+ fle->next = *head;
+ *head = fle;
+ fle->family = family;
+ fle->dir = dir;
+ memcpy(&fle->key, key, sizeof(*key));
+ fle->object = NULL;
+ flow_count(cpu)++;
+ }
+ }
+
+nocache:
+ {
+ void *obj;
+ atomic_t *obj_ref;
+
+ resolver(key, family, dir, &obj, &obj_ref);
+
+ if (fle) {
+ fle->genid = atomic_read(&flow_cache_genid);
+
+ if (fle->object)
+ atomic_dec(fle->object_ref);
+
+ fle->object = obj;
+ fle->object_ref = obj_ref;
+ if (obj)
+ atomic_inc(fle->object_ref);
+ }
+ local_bh_enable();
+
+ return obj;
+ }
+}
+
+static void flow_cache_flush_tasklet(unsigned long data)
+{
+ struct flow_flush_info *info = (void *)data;
+ int i;
+ int cpu;
+
+ cpu = smp_processor_id();
+ for (i = 0; i < flow_hash_size; i++) {
+ struct flow_cache_entry *fle;
+
+ fle = flow_table(cpu)[i];
+ for (; fle; fle = fle->next) {
+ unsigned genid = atomic_read(&flow_cache_genid);
+
+ if (!fle->object || fle->genid == genid)
+ continue;
+
+ fle->object = NULL;
+ atomic_dec(fle->object_ref);
+ }
+ }
+
+ if (atomic_dec_and_test(&info->cpuleft))
+ complete(&info->completion);
+}
+
+static void flow_cache_flush_per_cpu(void *) __attribute__((__unused__));
+static void flow_cache_flush_per_cpu(void *data)
+{
+ struct flow_flush_info *info = data;
+ int cpu;
+ struct tasklet_struct *tasklet;
+
+ cpu = smp_processor_id();
+
+ tasklet = flow_flush_tasklet(cpu);
+ tasklet->data = (unsigned long)info;
+ tasklet_schedule(tasklet);
+}
+
+void flow_cache_flush(void)
+{
+ struct flow_flush_info info;
+ static DECLARE_MUTEX(flow_flush_sem);
+
+ /* Don't want cpus going down or up during this. */
+ lock_cpu_hotplug();
+ down(&flow_flush_sem);
+ atomic_set(&info.cpuleft, num_online_cpus());
+ init_completion(&info.completion);
+
+ local_bh_disable();
+ smp_call_function(flow_cache_flush_per_cpu, &info, 1, 0);
+ flow_cache_flush_tasklet((unsigned long)&info);
+ local_bh_enable();
+
+ wait_for_completion(&info.completion);
+ up(&flow_flush_sem);
+ unlock_cpu_hotplug();
+}
+
+static void __devinit flow_cache_cpu_prepare(int cpu)
+{
+ struct tasklet_struct *tasklet;
+ unsigned long order;
+
+ for (order = 0;
+ (PAGE_SIZE << order) <
+ (sizeof(struct flow_cache_entry *)*flow_hash_size);
+ order++)
+ /* NOTHING */;
+
+ flow_table(cpu) = (struct flow_cache_entry **)
+ __get_free_pages(GFP_KERNEL, order);
+ if (!flow_table(cpu))
+ panic("NET: failed to allocate flow cache order %lu\n", order);
+
+ memset(flow_table(cpu), 0, PAGE_SIZE << order);
+
+ flow_hash_rnd_recalc(cpu) = 1;
+ flow_count(cpu) = 0;
+
+ tasklet = flow_flush_tasklet(cpu);
+ tasklet_init(tasklet, flow_cache_flush_tasklet, 0);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static int flow_cache_cpu(struct notifier_block *nfb,
+ unsigned long action,
+ void *hcpu)
+{
+ if (action == CPU_DEAD)
+ __flow_cache_shrink((unsigned long)hcpu, 0);
+ return NOTIFY_OK;
+}
+#endif /* CONFIG_HOTPLUG_CPU */
+
+static int __init flow_cache_init(void)
+{
+ int i;
+
+ flow_cachep = kmem_cache_create("flow_cache",
+ sizeof(struct flow_cache_entry),
+ 0, SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
+
+ if (!flow_cachep)
+ panic("NET: failed to allocate flow cache slab\n");
+
+ flow_hash_shift = 10;
+ flow_lwm = 2 * flow_hash_size;
+ flow_hwm = 4 * flow_hash_size;
+
+ init_timer(&flow_hash_rnd_timer);
+ flow_hash_rnd_timer.function = flow_cache_new_hashrnd;
+ flow_hash_rnd_timer.expires = jiffies + FLOW_HASH_RND_PERIOD;
+ add_timer(&flow_hash_rnd_timer);
+
+ for_each_cpu(i)
+ flow_cache_cpu_prepare(i);
+
+ hotcpu_notifier(flow_cache_cpu, 0);
+ return 0;
+}
+
+module_init(flow_cache_init);
+
+EXPORT_SYMBOL(flow_cache_genid);
+EXPORT_SYMBOL(flow_cache_lookup);
diff --git a/net/core/gen_estimator.c b/net/core/gen_estimator.c
new file mode 100644
index 0000000..b07c029
--- /dev/null
+++ b/net/core/gen_estimator.c
@@ -0,0 +1,250 @@
+/*
+ * net/sched/gen_estimator.c Simple rate estimator.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ * Changes:
+ * Jamal Hadi Salim - moved it to net/core and reshulfed
+ * names to make it usable in general net subsystem.
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/jiffies.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/socket.h>
+#include <linux/sockios.h>
+#include <linux/in.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+#include <linux/init.h>
+#include <net/sock.h>
+#include <net/gen_stats.h>
+
+/*
+ This code is NOT intended to be used for statistics collection,
+ its purpose is to provide a base for statistical multiplexing
+ for controlled load service.
+ If you need only statistics, run a user level daemon which
+ periodically reads byte counters.
+
+ Unfortunately, rate estimation is not a very easy task.
+ F.e. I did not find a simple way to estimate the current peak rate
+ and even failed to formulate the problem 8)8)
+
+ So I preferred not to built an estimator into the scheduler,
+ but run this task separately.
+ Ideally, it should be kernel thread(s), but for now it runs
+ from timers, which puts apparent top bounds on the number of rated
+ flows, has minimal overhead on small, but is enough
+ to handle controlled load service, sets of aggregates.
+
+ We measure rate over A=(1<<interval) seconds and evaluate EWMA:
+
+ avrate = avrate*(1-W) + rate*W
+
+ where W is chosen as negative power of 2: W = 2^(-ewma_log)
+
+ The resulting time constant is:
+
+ T = A/(-ln(1-W))
+
+
+ NOTES.
+
+ * The stored value for avbps is scaled by 2^5, so that maximal
+ rate is ~1Gbit, avpps is scaled by 2^10.
+
+ * Minimal interval is HZ/4=250msec (it is the greatest common divisor
+ for HZ=100 and HZ=1024 8)), maximal interval
+ is (HZ*2^EST_MAX_INTERVAL)/4 = 8sec. Shorter intervals
+ are too expensive, longer ones can be implemented
+ at user level painlessly.
+ */
+
+#define EST_MAX_INTERVAL 5
+
+struct gen_estimator
+{
+ struct gen_estimator *next;
+ struct gnet_stats_basic *bstats;
+ struct gnet_stats_rate_est *rate_est;
+ spinlock_t *stats_lock;
+ unsigned interval;
+ int ewma_log;
+ u64 last_bytes;
+ u32 last_packets;
+ u32 avpps;
+ u32 avbps;
+};
+
+struct gen_estimator_head
+{
+ struct timer_list timer;
+ struct gen_estimator *list;
+};
+
+static struct gen_estimator_head elist[EST_MAX_INTERVAL+1];
+
+/* Estimator array lock */
+static DEFINE_RWLOCK(est_lock);
+
+static void est_timer(unsigned long arg)
+{
+ int idx = (int)arg;
+ struct gen_estimator *e;
+
+ read_lock(&est_lock);
+ for (e = elist[idx].list; e; e = e->next) {
+ u64 nbytes;
+ u32 npackets;
+ u32 rate;
+
+ spin_lock(e->stats_lock);
+ nbytes = e->bstats->bytes;
+ npackets = e->bstats->packets;
+ rate = (nbytes - e->last_bytes)<<(7 - idx);
+ e->last_bytes = nbytes;
+ e->avbps += ((long)rate - (long)e->avbps) >> e->ewma_log;
+ e->rate_est->bps = (e->avbps+0xF)>>5;
+
+ rate = (npackets - e->last_packets)<<(12 - idx);
+ e->last_packets = npackets;
+ e->avpps += ((long)rate - (long)e->avpps) >> e->ewma_log;
+ e->rate_est->pps = (e->avpps+0x1FF)>>10;
+ spin_unlock(e->stats_lock);
+ }
+
+ mod_timer(&elist[idx].timer, jiffies + ((HZ<<idx)/4));
+ read_unlock(&est_lock);
+}
+
+/**
+ * gen_new_estimator - create a new rate estimator
+ * @bstats: basic statistics
+ * @rate_est: rate estimator statistics
+ * @stats_lock: statistics lock
+ * @opt: rate estimator configuration TLV
+ *
+ * Creates a new rate estimator with &bstats as source and &rate_est
+ * as destination. A new timer with the interval specified in the
+ * configuration TLV is created. Upon each interval, the latest statistics
+ * will be read from &bstats and the estimated rate will be stored in
+ * &rate_est with the statistics lock grabed during this period.
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int gen_new_estimator(struct gnet_stats_basic *bstats,
+ struct gnet_stats_rate_est *rate_est, spinlock_t *stats_lock, struct rtattr *opt)
+{
+ struct gen_estimator *est;
+ struct gnet_estimator *parm = RTA_DATA(opt);
+
+ if (RTA_PAYLOAD(opt) < sizeof(*parm))
+ return -EINVAL;
+
+ if (parm->interval < -2 || parm->interval > 3)
+ return -EINVAL;
+
+ est = kmalloc(sizeof(*est), GFP_KERNEL);
+ if (est == NULL)
+ return -ENOBUFS;
+
+ memset(est, 0, sizeof(*est));
+ est->interval = parm->interval + 2;
+ est->bstats = bstats;
+ est->rate_est = rate_est;
+ est->stats_lock = stats_lock;
+ est->ewma_log = parm->ewma_log;
+ est->last_bytes = bstats->bytes;
+ est->avbps = rate_est->bps<<5;
+ est->last_packets = bstats->packets;
+ est->avpps = rate_est->pps<<10;
+
+ est->next = elist[est->interval].list;
+ if (est->next == NULL) {
+ init_timer(&elist[est->interval].timer);
+ elist[est->interval].timer.data = est->interval;
+ elist[est->interval].timer.expires = jiffies + ((HZ<<est->interval)/4);
+ elist[est->interval].timer.function = est_timer;
+ add_timer(&elist[est->interval].timer);
+ }
+ write_lock_bh(&est_lock);
+ elist[est->interval].list = est;
+ write_unlock_bh(&est_lock);
+ return 0;
+}
+
+/**
+ * gen_kill_estimator - remove a rate estimator
+ * @bstats: basic statistics
+ * @rate_est: rate estimator statistics
+ *
+ * Removes the rate estimator specified by &bstats and &rate_est
+ * and deletes the timer.
+ */
+void gen_kill_estimator(struct gnet_stats_basic *bstats,
+ struct gnet_stats_rate_est *rate_est)
+{
+ int idx;
+ struct gen_estimator *est, **pest;
+
+ for (idx=0; idx <= EST_MAX_INTERVAL; idx++) {
+ int killed = 0;
+ pest = &elist[idx].list;
+ while ((est=*pest) != NULL) {
+ if (est->rate_est != rate_est || est->bstats != bstats) {
+ pest = &est->next;
+ continue;
+ }
+
+ write_lock_bh(&est_lock);
+ *pest = est->next;
+ write_unlock_bh(&est_lock);
+
+ kfree(est);
+ killed++;
+ }
+ if (killed && elist[idx].list == NULL)
+ del_timer(&elist[idx].timer);
+ }
+}
+
+/**
+ * gen_replace_estimator - replace rate estimator configruation
+ * @bstats: basic statistics
+ * @rate_est: rate estimator statistics
+ * @stats_lock: statistics lock
+ * @opt: rate estimator configuration TLV
+ *
+ * Replaces the configuration of a rate estimator by calling
+ * gen_kill_estimator() and gen_new_estimator().
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int
+gen_replace_estimator(struct gnet_stats_basic *bstats,
+ struct gnet_stats_rate_est *rate_est, spinlock_t *stats_lock,
+ struct rtattr *opt)
+{
+ gen_kill_estimator(bstats, rate_est);
+ return gen_new_estimator(bstats, rate_est, stats_lock, opt);
+}
+
+
+EXPORT_SYMBOL(gen_kill_estimator);
+EXPORT_SYMBOL(gen_new_estimator);
+EXPORT_SYMBOL(gen_replace_estimator);
diff --git a/net/core/gen_stats.c b/net/core/gen_stats.c
new file mode 100644
index 0000000..8f214903
--- /dev/null
+++ b/net/core/gen_stats.c
@@ -0,0 +1,239 @@
+/*
+ * net/core/gen_stats.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Thomas Graf <tgraf@suug.ch>
+ * Jamal Hadi Salim
+ * Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ * See Documentation/networking/gen_stats.txt
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/socket.h>
+#include <linux/rtnetlink.h>
+#include <linux/gen_stats.h>
+#include <net/gen_stats.h>
+
+
+static inline int
+gnet_stats_copy(struct gnet_dump *d, int type, void *buf, int size)
+{
+ RTA_PUT(d->skb, type, size, buf);
+ return 0;
+
+rtattr_failure:
+ spin_unlock_bh(d->lock);
+ return -1;
+}
+
+/**
+ * gnet_stats_start_copy_compat - start dumping procedure in compatibility mode
+ * @skb: socket buffer to put statistics TLVs into
+ * @type: TLV type for top level statistic TLV
+ * @tc_stats_type: TLV type for backward compatibility struct tc_stats TLV
+ * @xstats_type: TLV type for backward compatibility xstats TLV
+ * @lock: statistics lock
+ * @d: dumping handle
+ *
+ * Initializes the dumping handle, grabs the statistic lock and appends
+ * an empty TLV header to the socket buffer for use a container for all
+ * other statistic TLVS.
+ *
+ * The dumping handle is marked to be in backward compatibility mode telling
+ * all gnet_stats_copy_XXX() functions to fill a local copy of struct tc_stats.
+ *
+ * Returns 0 on success or -1 if the room in the socket buffer was not sufficient.
+ */
+int
+gnet_stats_start_copy_compat(struct sk_buff *skb, int type, int tc_stats_type,
+ int xstats_type, spinlock_t *lock, struct gnet_dump *d)
+{
+ memset(d, 0, sizeof(*d));
+
+ spin_lock_bh(lock);
+ d->lock = lock;
+ if (type)
+ d->tail = (struct rtattr *) skb->tail;
+ d->skb = skb;
+ d->compat_tc_stats = tc_stats_type;
+ d->compat_xstats = xstats_type;
+
+ if (d->tail)
+ return gnet_stats_copy(d, type, NULL, 0);
+
+ return 0;
+}
+
+/**
+ * gnet_stats_start_copy_compat - start dumping procedure in compatibility mode
+ * @skb: socket buffer to put statistics TLVs into
+ * @type: TLV type for top level statistic TLV
+ * @lock: statistics lock
+ * @d: dumping handle
+ *
+ * Initializes the dumping handle, grabs the statistic lock and appends
+ * an empty TLV header to the socket buffer for use a container for all
+ * other statistic TLVS.
+ *
+ * Returns 0 on success or -1 if the room in the socket buffer was not sufficient.
+ */
+int
+gnet_stats_start_copy(struct sk_buff *skb, int type, spinlock_t *lock,
+ struct gnet_dump *d)
+{
+ return gnet_stats_start_copy_compat(skb, type, 0, 0, lock, d);
+}
+
+/**
+ * gnet_stats_copy_basic - copy basic statistics into statistic TLV
+ * @d: dumping handle
+ * @b: basic statistics
+ *
+ * Appends the basic statistics to the top level TLV created by
+ * gnet_stats_start_copy().
+ *
+ * Returns 0 on success or -1 with the statistic lock released
+ * if the room in the socket buffer was not sufficient.
+ */
+int
+gnet_stats_copy_basic(struct gnet_dump *d, struct gnet_stats_basic *b)
+{
+ if (d->compat_tc_stats) {
+ d->tc_stats.bytes = b->bytes;
+ d->tc_stats.packets = b->packets;
+ }
+
+ if (d->tail)
+ return gnet_stats_copy(d, TCA_STATS_BASIC, b, sizeof(*b));
+
+ return 0;
+}
+
+/**
+ * gnet_stats_copy_rate_est - copy rate estimator statistics into statistics TLV
+ * @d: dumping handle
+ * @r: rate estimator statistics
+ *
+ * Appends the rate estimator statistics to the top level TLV created by
+ * gnet_stats_start_copy().
+ *
+ * Returns 0 on success or -1 with the statistic lock released
+ * if the room in the socket buffer was not sufficient.
+ */
+int
+gnet_stats_copy_rate_est(struct gnet_dump *d, struct gnet_stats_rate_est *r)
+{
+ if (d->compat_tc_stats) {
+ d->tc_stats.bps = r->bps;
+ d->tc_stats.pps = r->pps;
+ }
+
+ if (d->tail)
+ return gnet_stats_copy(d, TCA_STATS_RATE_EST, r, sizeof(*r));
+
+ return 0;
+}
+
+/**
+ * gnet_stats_copy_queue - copy queue statistics into statistics TLV
+ * @d: dumping handle
+ * @q: queue statistics
+ *
+ * Appends the queue statistics to the top level TLV created by
+ * gnet_stats_start_copy().
+ *
+ * Returns 0 on success or -1 with the statistic lock released
+ * if the room in the socket buffer was not sufficient.
+ */
+int
+gnet_stats_copy_queue(struct gnet_dump *d, struct gnet_stats_queue *q)
+{
+ if (d->compat_tc_stats) {
+ d->tc_stats.drops = q->drops;
+ d->tc_stats.qlen = q->qlen;
+ d->tc_stats.backlog = q->backlog;
+ d->tc_stats.overlimits = q->overlimits;
+ }
+
+ if (d->tail)
+ return gnet_stats_copy(d, TCA_STATS_QUEUE, q, sizeof(*q));
+
+ return 0;
+}
+
+/**
+ * gnet_stats_copy_app - copy application specific statistics into statistics TLV
+ * @d: dumping handle
+ * @st: application specific statistics data
+ * @len: length of data
+ *
+ * Appends the application sepecific statistics to the top level TLV created by
+ * gnet_stats_start_copy() and remembers the data for XSTATS if the dumping
+ * handle is in backward compatibility mode.
+ *
+ * Returns 0 on success or -1 with the statistic lock released
+ * if the room in the socket buffer was not sufficient.
+ */
+int
+gnet_stats_copy_app(struct gnet_dump *d, void *st, int len)
+{
+ if (d->compat_xstats) {
+ d->xstats = st;
+ d->xstats_len = len;
+ }
+
+ if (d->tail)
+ return gnet_stats_copy(d, TCA_STATS_APP, st, len);
+
+ return 0;
+}
+
+/**
+ * gnet_stats_finish_copy - finish dumping procedure
+ * @d: dumping handle
+ *
+ * Corrects the length of the top level TLV to include all TLVs added
+ * by gnet_stats_copy_XXX() calls. Adds the backward compatibility TLVs
+ * if gnet_stats_start_copy_compat() was used and releases the statistics
+ * lock.
+ *
+ * Returns 0 on success or -1 with the statistic lock released
+ * if the room in the socket buffer was not sufficient.
+ */
+int
+gnet_stats_finish_copy(struct gnet_dump *d)
+{
+ if (d->tail)
+ d->tail->rta_len = d->skb->tail - (u8 *) d->tail;
+
+ if (d->compat_tc_stats)
+ if (gnet_stats_copy(d, d->compat_tc_stats, &d->tc_stats,
+ sizeof(d->tc_stats)) < 0)
+ return -1;
+
+ if (d->compat_xstats && d->xstats) {
+ if (gnet_stats_copy(d, d->compat_xstats, d->xstats,
+ d->xstats_len) < 0)
+ return -1;
+ }
+
+ spin_unlock_bh(d->lock);
+ return 0;
+}
+
+
+EXPORT_SYMBOL(gnet_stats_start_copy);
+EXPORT_SYMBOL(gnet_stats_start_copy_compat);
+EXPORT_SYMBOL(gnet_stats_copy_basic);
+EXPORT_SYMBOL(gnet_stats_copy_rate_est);
+EXPORT_SYMBOL(gnet_stats_copy_queue);
+EXPORT_SYMBOL(gnet_stats_copy_app);
+EXPORT_SYMBOL(gnet_stats_finish_copy);
diff --git a/net/core/iovec.c b/net/core/iovec.c
new file mode 100644
index 0000000..d57ace9
--- /dev/null
+++ b/net/core/iovec.c
@@ -0,0 +1,239 @@
+/*
+ * iovec manipulation routines.
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Fixes:
+ * Andrew Lunn : Errors in iovec copying.
+ * Pedro Roque : Added memcpy_fromiovecend and
+ * csum_..._fromiovecend.
+ * Andi Kleen : fixed error handling for 2.1
+ * Alexey Kuznetsov: 2.1 optimisations
+ * Andi Kleen : Fix csum*fromiovecend for IPv6.
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/net.h>
+#include <linux/in6.h>
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+#include <net/checksum.h>
+#include <net/sock.h>
+
+/*
+ * Verify iovec. The caller must ensure that the iovec is big enough
+ * to hold the message iovec.
+ *
+ * Save time not doing verify_area. copy_*_user will make this work
+ * in any case.
+ */
+
+int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode)
+{
+ int size, err, ct;
+
+ if (m->msg_namelen) {
+ if (mode == VERIFY_READ) {
+ err = move_addr_to_kernel(m->msg_name, m->msg_namelen,
+ address);
+ if (err < 0)
+ return err;
+ }
+ m->msg_name = address;
+ } else {
+ m->msg_name = NULL;
+ }
+
+ size = m->msg_iovlen * sizeof(struct iovec);
+ if (copy_from_user(iov, m->msg_iov, size))
+ return -EFAULT;
+
+ m->msg_iov = iov;
+ err = 0;
+
+ for (ct = 0; ct < m->msg_iovlen; ct++) {
+ err += iov[ct].iov_len;
+ /*
+ * Goal is not to verify user data, but to prevent returning
+ * negative value, which is interpreted as errno.
+ * Overflow is still possible, but it is harmless.
+ */
+ if (err < 0)
+ return -EMSGSIZE;
+ }
+
+ return err;
+}
+
+/*
+ * Copy kernel to iovec. Returns -EFAULT on error.
+ *
+ * Note: this modifies the original iovec.
+ */
+
+int memcpy_toiovec(struct iovec *iov, unsigned char *kdata, int len)
+{
+ while (len > 0) {
+ if (iov->iov_len) {
+ int copy = min_t(unsigned int, iov->iov_len, len);
+ if (copy_to_user(iov->iov_base, kdata, copy))
+ return -EFAULT;
+ kdata += copy;
+ len -= copy;
+ iov->iov_len -= copy;
+ iov->iov_base += copy;
+ }
+ iov++;
+ }
+
+ return 0;
+}
+
+/*
+ * Copy iovec to kernel. Returns -EFAULT on error.
+ *
+ * Note: this modifies the original iovec.
+ */
+
+int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len)
+{
+ while (len > 0) {
+ if (iov->iov_len) {
+ int copy = min_t(unsigned int, len, iov->iov_len);
+ if (copy_from_user(kdata, iov->iov_base, copy))
+ return -EFAULT;
+ len -= copy;
+ kdata += copy;
+ iov->iov_base += copy;
+ iov->iov_len -= copy;
+ }
+ iov++;
+ }
+
+ return 0;
+}
+
+/*
+ * For use with ip_build_xmit
+ */
+int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov, int offset,
+ int len)
+{
+ /* Skip over the finished iovecs */
+ while (offset >= iov->iov_len) {
+ offset -= iov->iov_len;
+ iov++;
+ }
+
+ while (len > 0) {
+ u8 __user *base = iov->iov_base + offset;
+ int copy = min_t(unsigned int, len, iov->iov_len - offset);
+
+ offset = 0;
+ if (copy_from_user(kdata, base, copy))
+ return -EFAULT;
+ len -= copy;
+ kdata += copy;
+ iov++;
+ }
+
+ return 0;
+}
+
+/*
+ * And now for the all-in-one: copy and checksum from a user iovec
+ * directly to a datagram
+ * Calls to csum_partial but the last must be in 32 bit chunks
+ *
+ * ip_build_xmit must ensure that when fragmenting only the last
+ * call to this function will be unaligned also.
+ */
+int csum_partial_copy_fromiovecend(unsigned char *kdata, struct iovec *iov,
+ int offset, unsigned int len, int *csump)
+{
+ int csum = *csump;
+ int partial_cnt = 0, err = 0;
+
+ /* Skip over the finished iovecs */
+ while (offset >= iov->iov_len) {
+ offset -= iov->iov_len;
+ iov++;
+ }
+
+ while (len > 0) {
+ u8 __user *base = iov->iov_base + offset;
+ int copy = min_t(unsigned int, len, iov->iov_len - offset);
+
+ offset = 0;
+
+ /* There is a remnant from previous iov. */
+ if (partial_cnt) {
+ int par_len = 4 - partial_cnt;
+
+ /* iov component is too short ... */
+ if (par_len > copy) {
+ if (copy_from_user(kdata, base, copy))
+ goto out_fault;
+ kdata += copy;
+ base += copy;
+ partial_cnt += copy;
+ len -= copy;
+ iov++;
+ if (len)
+ continue;
+ *csump = csum_partial(kdata - partial_cnt,
+ partial_cnt, csum);
+ goto out;
+ }
+ if (copy_from_user(kdata, base, par_len))
+ goto out_fault;
+ csum = csum_partial(kdata - partial_cnt, 4, csum);
+ kdata += par_len;
+ base += par_len;
+ copy -= par_len;
+ len -= par_len;
+ partial_cnt = 0;
+ }
+
+ if (len > copy) {
+ partial_cnt = copy % 4;
+ if (partial_cnt) {
+ copy -= partial_cnt;
+ if (copy_from_user(kdata + copy, base + copy,
+ partial_cnt))
+ goto out_fault;
+ }
+ }
+
+ if (copy) {
+ csum = csum_and_copy_from_user(base, kdata, copy,
+ csum, &err);
+ if (err)
+ goto out;
+ }
+ len -= copy + partial_cnt;
+ kdata += copy + partial_cnt;
+ iov++;
+ }
+ *csump = csum;
+out:
+ return err;
+
+out_fault:
+ err = -EFAULT;
+ goto out;
+}
+
+EXPORT_SYMBOL(csum_partial_copy_fromiovecend);
+EXPORT_SYMBOL(memcpy_fromiovec);
+EXPORT_SYMBOL(memcpy_fromiovecend);
+EXPORT_SYMBOL(memcpy_toiovec);
diff --git a/net/core/link_watch.c b/net/core/link_watch.c
new file mode 100644
index 0000000..4859b74
--- /dev/null
+++ b/net/core/link_watch.c
@@ -0,0 +1,137 @@
+/*
+ * Linux network device link state notification
+ *
+ * Author:
+ * Stefan Rompf <sux@loplof.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/if.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/jiffies.h>
+#include <linux/spinlock.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/bitops.h>
+#include <asm/types.h>
+
+
+enum lw_bits {
+ LW_RUNNING = 0,
+ LW_SE_USED
+};
+
+static unsigned long linkwatch_flags;
+static unsigned long linkwatch_nextevent;
+
+static void linkwatch_event(void *dummy);
+static DECLARE_WORK(linkwatch_work, linkwatch_event, NULL);
+
+static LIST_HEAD(lweventlist);
+static DEFINE_SPINLOCK(lweventlist_lock);
+
+struct lw_event {
+ struct list_head list;
+ struct net_device *dev;
+};
+
+/* Avoid kmalloc() for most systems */
+static struct lw_event singleevent;
+
+/* Must be called with the rtnl semaphore held */
+void linkwatch_run_queue(void)
+{
+ LIST_HEAD(head);
+ struct list_head *n, *next;
+
+ spin_lock_irq(&lweventlist_lock);
+ list_splice_init(&lweventlist, &head);
+ spin_unlock_irq(&lweventlist_lock);
+
+ list_for_each_safe(n, next, &head) {
+ struct lw_event *event = list_entry(n, struct lw_event, list);
+ struct net_device *dev = event->dev;
+
+ if (event == &singleevent) {
+ clear_bit(LW_SE_USED, &linkwatch_flags);
+ } else {
+ kfree(event);
+ }
+
+ /* We are about to handle this device,
+ * so new events can be accepted
+ */
+ clear_bit(__LINK_STATE_LINKWATCH_PENDING, &dev->state);
+
+ if (dev->flags & IFF_UP) {
+ netdev_state_change(dev);
+ }
+
+ dev_put(dev);
+ }
+}
+
+
+static void linkwatch_event(void *dummy)
+{
+ /* Limit the number of linkwatch events to one
+ * per second so that a runaway driver does not
+ * cause a storm of messages on the netlink
+ * socket
+ */
+ linkwatch_nextevent = jiffies + HZ;
+ clear_bit(LW_RUNNING, &linkwatch_flags);
+
+ rtnl_shlock();
+ linkwatch_run_queue();
+ rtnl_shunlock();
+}
+
+
+void linkwatch_fire_event(struct net_device *dev)
+{
+ if (!test_and_set_bit(__LINK_STATE_LINKWATCH_PENDING, &dev->state)) {
+ unsigned long flags;
+ struct lw_event *event;
+
+ if (test_and_set_bit(LW_SE_USED, &linkwatch_flags)) {
+ event = kmalloc(sizeof(struct lw_event), GFP_ATOMIC);
+
+ if (unlikely(event == NULL)) {
+ clear_bit(__LINK_STATE_LINKWATCH_PENDING, &dev->state);
+ return;
+ }
+ } else {
+ event = &singleevent;
+ }
+
+ dev_hold(dev);
+ event->dev = dev;
+
+ spin_lock_irqsave(&lweventlist_lock, flags);
+ list_add_tail(&event->list, &lweventlist);
+ spin_unlock_irqrestore(&lweventlist_lock, flags);
+
+ if (!test_and_set_bit(LW_RUNNING, &linkwatch_flags)) {
+ unsigned long thisevent = jiffies;
+
+ if (thisevent >= linkwatch_nextevent) {
+ schedule_work(&linkwatch_work);
+ } else {
+ schedule_delayed_work(&linkwatch_work, linkwatch_nextevent - thisevent);
+ }
+ }
+ }
+}
+
+EXPORT_SYMBOL(linkwatch_fire_event);
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
new file mode 100644
index 0000000..0a2f67b
--- /dev/null
+++ b/net/core/neighbour.c
@@ -0,0 +1,2362 @@
+/*
+ * Generic address resolution entity
+ *
+ * Authors:
+ * Pedro Roque <roque@di.fc.ul.pt>
+ * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Fixes:
+ * Vitaly E. Lavrov releasing NULL neighbor in neigh_add.
+ * Harald Welte Add neighbour cache statistics like rtstat
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/socket.h>
+#include <linux/sched.h>
+#include <linux/netdevice.h>
+#include <linux/proc_fs.h>
+#ifdef CONFIG_SYSCTL
+#include <linux/sysctl.h>
+#endif
+#include <linux/times.h>
+#include <net/neighbour.h>
+#include <net/dst.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/random.h>
+
+#define NEIGH_DEBUG 1
+
+#define NEIGH_PRINTK(x...) printk(x)
+#define NEIGH_NOPRINTK(x...) do { ; } while(0)
+#define NEIGH_PRINTK0 NEIGH_PRINTK
+#define NEIGH_PRINTK1 NEIGH_NOPRINTK
+#define NEIGH_PRINTK2 NEIGH_NOPRINTK
+
+#if NEIGH_DEBUG >= 1
+#undef NEIGH_PRINTK1
+#define NEIGH_PRINTK1 NEIGH_PRINTK
+#endif
+#if NEIGH_DEBUG >= 2
+#undef NEIGH_PRINTK2
+#define NEIGH_PRINTK2 NEIGH_PRINTK
+#endif
+
+#define PNEIGH_HASHMASK 0xF
+
+static void neigh_timer_handler(unsigned long arg);
+#ifdef CONFIG_ARPD
+static void neigh_app_notify(struct neighbour *n);
+#endif
+static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev);
+void neigh_changeaddr(struct neigh_table *tbl, struct net_device *dev);
+
+static struct neigh_table *neigh_tables;
+static struct file_operations neigh_stat_seq_fops;
+
+/*
+ Neighbour hash table buckets are protected with rwlock tbl->lock.
+
+ - All the scans/updates to hash buckets MUST be made under this lock.
+ - NOTHING clever should be made under this lock: no callbacks
+ to protocol backends, no attempts to send something to network.
+ It will result in deadlocks, if backend/driver wants to use neighbour
+ cache.
+ - If the entry requires some non-trivial actions, increase
+ its reference count and release table lock.
+
+ Neighbour entries are protected:
+ - with reference count.
+ - with rwlock neigh->lock
+
+ Reference count prevents destruction.
+
+ neigh->lock mainly serializes ll address data and its validity state.
+ However, the same lock is used to protect another entry fields:
+ - timer
+ - resolution queue
+
+ Again, nothing clever shall be made under neigh->lock,
+ the most complicated procedure, which we allow is dev->hard_header.
+ It is supposed, that dev->hard_header is simplistic and does
+ not make callbacks to neighbour tables.
+
+ The last lock is neigh_tbl_lock. It is pure SMP lock, protecting
+ list of neighbour tables. This list is used only in process context,
+ */
+
+static DEFINE_RWLOCK(neigh_tbl_lock);
+
+static int neigh_blackhole(struct sk_buff *skb)
+{
+ kfree_skb(skb);
+ return -ENETDOWN;
+}
+
+/*
+ * It is random distribution in the interval (1/2)*base...(3/2)*base.
+ * It corresponds to default IPv6 settings and is not overridable,
+ * because it is really reasonable choice.
+ */
+
+unsigned long neigh_rand_reach_time(unsigned long base)
+{
+ return (base ? (net_random() % base) + (base >> 1) : 0);
+}
+
+
+static int neigh_forced_gc(struct neigh_table *tbl)
+{
+ int shrunk = 0;
+ int i;
+
+ NEIGH_CACHE_STAT_INC(tbl, forced_gc_runs);
+
+ write_lock_bh(&tbl->lock);
+ for (i = 0; i <= tbl->hash_mask; i++) {
+ struct neighbour *n, **np;
+
+ np = &tbl->hash_buckets[i];
+ while ((n = *np) != NULL) {
+ /* Neighbour record may be discarded if:
+ * - nobody refers to it.
+ * - it is not permanent
+ */
+ write_lock(&n->lock);
+ if (atomic_read(&n->refcnt) == 1 &&
+ !(n->nud_state & NUD_PERMANENT)) {
+ *np = n->next;
+ n->dead = 1;
+ shrunk = 1;
+ write_unlock(&n->lock);
+ neigh_release(n);
+ continue;
+ }
+ write_unlock(&n->lock);
+ np = &n->next;
+ }
+ }
+
+ tbl->last_flush = jiffies;
+
+ write_unlock_bh(&tbl->lock);
+
+ return shrunk;
+}
+
+static int neigh_del_timer(struct neighbour *n)
+{
+ if ((n->nud_state & NUD_IN_TIMER) &&
+ del_timer(&n->timer)) {
+ neigh_release(n);
+ return 1;
+ }
+ return 0;
+}
+
+static void pneigh_queue_purge(struct sk_buff_head *list)
+{
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(list)) != NULL) {
+ dev_put(skb->dev);
+ kfree_skb(skb);
+ }
+}
+
+void neigh_changeaddr(struct neigh_table *tbl, struct net_device *dev)
+{
+ int i;
+
+ write_lock_bh(&tbl->lock);
+
+ for (i=0; i <= tbl->hash_mask; i++) {
+ struct neighbour *n, **np;
+
+ np = &tbl->hash_buckets[i];
+ while ((n = *np) != NULL) {
+ if (dev && n->dev != dev) {
+ np = &n->next;
+ continue;
+ }
+ *np = n->next;
+ write_lock_bh(&n->lock);
+ n->dead = 1;
+ neigh_del_timer(n);
+ write_unlock_bh(&n->lock);
+ neigh_release(n);
+ }
+ }
+
+ write_unlock_bh(&tbl->lock);
+}
+
+int neigh_ifdown(struct neigh_table *tbl, struct net_device *dev)
+{
+ int i;
+
+ write_lock_bh(&tbl->lock);
+
+ for (i = 0; i <= tbl->hash_mask; i++) {
+ struct neighbour *n, **np = &tbl->hash_buckets[i];
+
+ while ((n = *np) != NULL) {
+ if (dev && n->dev != dev) {
+ np = &n->next;
+ continue;
+ }
+ *np = n->next;
+ write_lock(&n->lock);
+ neigh_del_timer(n);
+ n->dead = 1;
+
+ if (atomic_read(&n->refcnt) != 1) {
+ /* The most unpleasant situation.
+ We must destroy neighbour entry,
+ but someone still uses it.
+
+ The destroy will be delayed until
+ the last user releases us, but
+ we must kill timers etc. and move
+ it to safe state.
+ */
+ skb_queue_purge(&n->arp_queue);
+ n->output = neigh_blackhole;
+ if (n->nud_state & NUD_VALID)
+ n->nud_state = NUD_NOARP;
+ else
+ n->nud_state = NUD_NONE;
+ NEIGH_PRINTK2("neigh %p is stray.\n", n);
+ }
+ write_unlock(&n->lock);
+ neigh_release(n);
+ }
+ }
+
+ pneigh_ifdown(tbl, dev);
+ write_unlock_bh(&tbl->lock);
+
+ del_timer_sync(&tbl->proxy_timer);
+ pneigh_queue_purge(&tbl->proxy_queue);
+ return 0;
+}
+
+static struct neighbour *neigh_alloc(struct neigh_table *tbl)
+{
+ struct neighbour *n = NULL;
+ unsigned long now = jiffies;
+ int entries;
+
+ entries = atomic_inc_return(&tbl->entries) - 1;
+ if (entries >= tbl->gc_thresh3 ||
+ (entries >= tbl->gc_thresh2 &&
+ time_after(now, tbl->last_flush + 5 * HZ))) {
+ if (!neigh_forced_gc(tbl) &&
+ entries >= tbl->gc_thresh3)
+ goto out_entries;
+ }
+
+ n = kmem_cache_alloc(tbl->kmem_cachep, SLAB_ATOMIC);
+ if (!n)
+ goto out_entries;
+
+ memset(n, 0, tbl->entry_size);
+
+ skb_queue_head_init(&n->arp_queue);
+ rwlock_init(&n->lock);
+ n->updated = n->used = now;
+ n->nud_state = NUD_NONE;
+ n->output = neigh_blackhole;
+ n->parms = neigh_parms_clone(&tbl->parms);
+ init_timer(&n->timer);
+ n->timer.function = neigh_timer_handler;
+ n->timer.data = (unsigned long)n;
+
+ NEIGH_CACHE_STAT_INC(tbl, allocs);
+ n->tbl = tbl;
+ atomic_set(&n->refcnt, 1);
+ n->dead = 1;
+out:
+ return n;
+
+out_entries:
+ atomic_dec(&tbl->entries);
+ goto out;
+}
+
+static struct neighbour **neigh_hash_alloc(unsigned int entries)
+{
+ unsigned long size = entries * sizeof(struct neighbour *);
+ struct neighbour **ret;
+
+ if (size <= PAGE_SIZE) {
+ ret = kmalloc(size, GFP_ATOMIC);
+ } else {
+ ret = (struct neighbour **)
+ __get_free_pages(GFP_ATOMIC, get_order(size));
+ }
+ if (ret)
+ memset(ret, 0, size);
+
+ return ret;
+}
+
+static void neigh_hash_free(struct neighbour **hash, unsigned int entries)
+{
+ unsigned long size = entries * sizeof(struct neighbour *);
+
+ if (size <= PAGE_SIZE)
+ kfree(hash);
+ else
+ free_pages((unsigned long)hash, get_order(size));
+}
+
+static void neigh_hash_grow(struct neigh_table *tbl, unsigned long new_entries)
+{
+ struct neighbour **new_hash, **old_hash;
+ unsigned int i, new_hash_mask, old_entries;
+
+ NEIGH_CACHE_STAT_INC(tbl, hash_grows);
+
+ BUG_ON(new_entries & (new_entries - 1));
+ new_hash = neigh_hash_alloc(new_entries);
+ if (!new_hash)
+ return;
+
+ old_entries = tbl->hash_mask + 1;
+ new_hash_mask = new_entries - 1;
+ old_hash = tbl->hash_buckets;
+
+ get_random_bytes(&tbl->hash_rnd, sizeof(tbl->hash_rnd));
+ for (i = 0; i < old_entries; i++) {
+ struct neighbour *n, *next;
+
+ for (n = old_hash[i]; n; n = next) {
+ unsigned int hash_val = tbl->hash(n->primary_key, n->dev);
+
+ hash_val &= new_hash_mask;
+ next = n->next;
+
+ n->next = new_hash[hash_val];
+ new_hash[hash_val] = n;
+ }
+ }
+ tbl->hash_buckets = new_hash;
+ tbl->hash_mask = new_hash_mask;
+
+ neigh_hash_free(old_hash, old_entries);
+}
+
+struct neighbour *neigh_lookup(struct neigh_table *tbl, const void *pkey,
+ struct net_device *dev)
+{
+ struct neighbour *n;
+ int key_len = tbl->key_len;
+ u32 hash_val = tbl->hash(pkey, dev) & tbl->hash_mask;
+
+ NEIGH_CACHE_STAT_INC(tbl, lookups);
+
+ read_lock_bh(&tbl->lock);
+ for (n = tbl->hash_buckets[hash_val]; n; n = n->next) {
+ if (dev == n->dev && !memcmp(n->primary_key, pkey, key_len)) {
+ neigh_hold(n);
+ NEIGH_CACHE_STAT_INC(tbl, hits);
+ break;
+ }
+ }
+ read_unlock_bh(&tbl->lock);
+ return n;
+}
+
+struct neighbour *neigh_lookup_nodev(struct neigh_table *tbl, const void *pkey)
+{
+ struct neighbour *n;
+ int key_len = tbl->key_len;
+ u32 hash_val = tbl->hash(pkey, NULL) & tbl->hash_mask;
+
+ NEIGH_CACHE_STAT_INC(tbl, lookups);
+
+ read_lock_bh(&tbl->lock);
+ for (n = tbl->hash_buckets[hash_val]; n; n = n->next) {
+ if (!memcmp(n->primary_key, pkey, key_len)) {
+ neigh_hold(n);
+ NEIGH_CACHE_STAT_INC(tbl, hits);
+ break;
+ }
+ }
+ read_unlock_bh(&tbl->lock);
+ return n;
+}
+
+struct neighbour *neigh_create(struct neigh_table *tbl, const void *pkey,
+ struct net_device *dev)
+{
+ u32 hash_val;
+ int key_len = tbl->key_len;
+ int error;
+ struct neighbour *n1, *rc, *n = neigh_alloc(tbl);
+
+ if (!n) {
+ rc = ERR_PTR(-ENOBUFS);
+ goto out;
+ }
+
+ memcpy(n->primary_key, pkey, key_len);
+ n->dev = dev;
+ dev_hold(dev);
+
+ /* Protocol specific setup. */
+ if (tbl->constructor && (error = tbl->constructor(n)) < 0) {
+ rc = ERR_PTR(error);
+ goto out_neigh_release;
+ }
+
+ /* Device specific setup. */
+ if (n->parms->neigh_setup &&
+ (error = n->parms->neigh_setup(n)) < 0) {
+ rc = ERR_PTR(error);
+ goto out_neigh_release;
+ }
+
+ n->confirmed = jiffies - (n->parms->base_reachable_time << 1);
+
+ write_lock_bh(&tbl->lock);
+
+ if (atomic_read(&tbl->entries) > (tbl->hash_mask + 1))
+ neigh_hash_grow(tbl, (tbl->hash_mask + 1) << 1);
+
+ hash_val = tbl->hash(pkey, dev) & tbl->hash_mask;
+
+ if (n->parms->dead) {
+ rc = ERR_PTR(-EINVAL);
+ goto out_tbl_unlock;
+ }
+
+ for (n1 = tbl->hash_buckets[hash_val]; n1; n1 = n1->next) {
+ if (dev == n1->dev && !memcmp(n1->primary_key, pkey, key_len)) {
+ neigh_hold(n1);
+ rc = n1;
+ goto out_tbl_unlock;
+ }
+ }
+
+ n->next = tbl->hash_buckets[hash_val];
+ tbl->hash_buckets[hash_val] = n;
+ n->dead = 0;
+ neigh_hold(n);
+ write_unlock_bh(&tbl->lock);
+ NEIGH_PRINTK2("neigh %p is created.\n", n);
+ rc = n;
+out:
+ return rc;
+out_tbl_unlock:
+ write_unlock_bh(&tbl->lock);
+out_neigh_release:
+ neigh_release(n);
+ goto out;
+}
+
+struct pneigh_entry * pneigh_lookup(struct neigh_table *tbl, const void *pkey,
+ struct net_device *dev, int creat)
+{
+ struct pneigh_entry *n;
+ int key_len = tbl->key_len;
+ u32 hash_val = *(u32 *)(pkey + key_len - 4);
+
+ hash_val ^= (hash_val >> 16);
+ hash_val ^= hash_val >> 8;
+ hash_val ^= hash_val >> 4;
+ hash_val &= PNEIGH_HASHMASK;
+
+ read_lock_bh(&tbl->lock);
+
+ for (n = tbl->phash_buckets[hash_val]; n; n = n->next) {
+ if (!memcmp(n->key, pkey, key_len) &&
+ (n->dev == dev || !n->dev)) {
+ read_unlock_bh(&tbl->lock);
+ goto out;
+ }
+ }
+ read_unlock_bh(&tbl->lock);
+ n = NULL;
+ if (!creat)
+ goto out;
+
+ n = kmalloc(sizeof(*n) + key_len, GFP_KERNEL);
+ if (!n)
+ goto out;
+
+ memcpy(n->key, pkey, key_len);
+ n->dev = dev;
+ if (dev)
+ dev_hold(dev);
+
+ if (tbl->pconstructor && tbl->pconstructor(n)) {
+ if (dev)
+ dev_put(dev);
+ kfree(n);
+ n = NULL;
+ goto out;
+ }
+
+ write_lock_bh(&tbl->lock);
+ n->next = tbl->phash_buckets[hash_val];
+ tbl->phash_buckets[hash_val] = n;
+ write_unlock_bh(&tbl->lock);
+out:
+ return n;
+}
+
+
+int pneigh_delete(struct neigh_table *tbl, const void *pkey,
+ struct net_device *dev)
+{
+ struct pneigh_entry *n, **np;
+ int key_len = tbl->key_len;
+ u32 hash_val = *(u32 *)(pkey + key_len - 4);
+
+ hash_val ^= (hash_val >> 16);
+ hash_val ^= hash_val >> 8;
+ hash_val ^= hash_val >> 4;
+ hash_val &= PNEIGH_HASHMASK;
+
+ write_lock_bh(&tbl->lock);
+ for (np = &tbl->phash_buckets[hash_val]; (n = *np) != NULL;
+ np = &n->next) {
+ if (!memcmp(n->key, pkey, key_len) && n->dev == dev) {
+ *np = n->next;
+ write_unlock_bh(&tbl->lock);
+ if (tbl->pdestructor)
+ tbl->pdestructor(n);
+ if (n->dev)
+ dev_put(n->dev);
+ kfree(n);
+ return 0;
+ }
+ }
+ write_unlock_bh(&tbl->lock);
+ return -ENOENT;
+}
+
+static int pneigh_ifdown(struct neigh_table *tbl, struct net_device *dev)
+{
+ struct pneigh_entry *n, **np;
+ u32 h;
+
+ for (h = 0; h <= PNEIGH_HASHMASK; h++) {
+ np = &tbl->phash_buckets[h];
+ while ((n = *np) != NULL) {
+ if (!dev || n->dev == dev) {
+ *np = n->next;
+ if (tbl->pdestructor)
+ tbl->pdestructor(n);
+ if (n->dev)
+ dev_put(n->dev);
+ kfree(n);
+ continue;
+ }
+ np = &n->next;
+ }
+ }
+ return -ENOENT;
+}
+
+
+/*
+ * neighbour must already be out of the table;
+ *
+ */
+void neigh_destroy(struct neighbour *neigh)
+{
+ struct hh_cache *hh;
+
+ NEIGH_CACHE_STAT_INC(neigh->tbl, destroys);
+
+ if (!neigh->dead) {
+ printk(KERN_WARNING
+ "Destroying alive neighbour %p\n", neigh);
+ dump_stack();
+ return;
+ }
+
+ if (neigh_del_timer(neigh))
+ printk(KERN_WARNING "Impossible event.\n");
+
+ while ((hh = neigh->hh) != NULL) {
+ neigh->hh = hh->hh_next;
+ hh->hh_next = NULL;
+ write_lock_bh(&hh->hh_lock);
+ hh->hh_output = neigh_blackhole;
+ write_unlock_bh(&hh->hh_lock);
+ if (atomic_dec_and_test(&hh->hh_refcnt))
+ kfree(hh);
+ }
+
+ if (neigh->ops && neigh->ops->destructor)
+ (neigh->ops->destructor)(neigh);
+
+ skb_queue_purge(&neigh->arp_queue);
+
+ dev_put(neigh->dev);
+ neigh_parms_put(neigh->parms);
+
+ NEIGH_PRINTK2("neigh %p is destroyed.\n", neigh);
+
+ atomic_dec(&neigh->tbl->entries);
+ kmem_cache_free(neigh->tbl->kmem_cachep, neigh);
+}
+
+/* Neighbour state is suspicious;
+ disable fast path.
+
+ Called with write_locked neigh.
+ */
+static void neigh_suspect(struct neighbour *neigh)
+{
+ struct hh_cache *hh;
+
+ NEIGH_PRINTK2("neigh %p is suspected.\n", neigh);
+
+ neigh->output = neigh->ops->output;
+
+ for (hh = neigh->hh; hh; hh = hh->hh_next)
+ hh->hh_output = neigh->ops->output;
+}
+
+/* Neighbour state is OK;
+ enable fast path.
+
+ Called with write_locked neigh.
+ */
+static void neigh_connect(struct neighbour *neigh)
+{
+ struct hh_cache *hh;
+
+ NEIGH_PRINTK2("neigh %p is connected.\n", neigh);
+
+ neigh->output = neigh->ops->connected_output;
+
+ for (hh = neigh->hh; hh; hh = hh->hh_next)
+ hh->hh_output = neigh->ops->hh_output;
+}
+
+static void neigh_periodic_timer(unsigned long arg)
+{
+ struct neigh_table *tbl = (struct neigh_table *)arg;
+ struct neighbour *n, **np;
+ unsigned long expire, now = jiffies;
+
+ NEIGH_CACHE_STAT_INC(tbl, periodic_gc_runs);
+
+ write_lock(&tbl->lock);
+
+ /*
+ * periodically recompute ReachableTime from random function
+ */
+
+ if (time_after(now, tbl->last_rand + 300 * HZ)) {
+ struct neigh_parms *p;
+ tbl->last_rand = now;
+ for (p = &tbl->parms; p; p = p->next)
+ p->reachable_time =
+ neigh_rand_reach_time(p->base_reachable_time);
+ }
+
+ np = &tbl->hash_buckets[tbl->hash_chain_gc];
+ tbl->hash_chain_gc = ((tbl->hash_chain_gc + 1) & tbl->hash_mask);
+
+ while ((n = *np) != NULL) {
+ unsigned int state;
+
+ write_lock(&n->lock);
+
+ state = n->nud_state;
+ if (state & (NUD_PERMANENT | NUD_IN_TIMER)) {
+ write_unlock(&n->lock);
+ goto next_elt;
+ }
+
+ if (time_before(n->used, n->confirmed))
+ n->used = n->confirmed;
+
+ if (atomic_read(&n->refcnt) == 1 &&
+ (state == NUD_FAILED ||
+ time_after(now, n->used + n->parms->gc_staletime))) {
+ *np = n->next;
+ n->dead = 1;
+ write_unlock(&n->lock);
+ neigh_release(n);
+ continue;
+ }
+ write_unlock(&n->lock);
+
+next_elt:
+ np = &n->next;
+ }
+
+ /* Cycle through all hash buckets every base_reachable_time/2 ticks.
+ * ARP entry timeouts range from 1/2 base_reachable_time to 3/2
+ * base_reachable_time.
+ */
+ expire = tbl->parms.base_reachable_time >> 1;
+ expire /= (tbl->hash_mask + 1);
+ if (!expire)
+ expire = 1;
+
+ mod_timer(&tbl->gc_timer, now + expire);
+
+ write_unlock(&tbl->lock);
+}
+
+static __inline__ int neigh_max_probes(struct neighbour *n)
+{
+ struct neigh_parms *p = n->parms;
+ return (n->nud_state & NUD_PROBE ?
+ p->ucast_probes :
+ p->ucast_probes + p->app_probes + p->mcast_probes);
+}
+
+
+/* Called when a timer expires for a neighbour entry. */
+
+static void neigh_timer_handler(unsigned long arg)
+{
+ unsigned long now, next;
+ struct neighbour *neigh = (struct neighbour *)arg;
+ unsigned state;
+ int notify = 0;
+
+ write_lock(&neigh->lock);
+
+ state = neigh->nud_state;
+ now = jiffies;
+ next = now + HZ;
+
+ if (!(state & NUD_IN_TIMER)) {
+#ifndef CONFIG_SMP
+ printk(KERN_WARNING "neigh: timer & !nud_in_timer\n");
+#endif
+ goto out;
+ }
+
+ if (state & NUD_REACHABLE) {
+ if (time_before_eq(now,
+ neigh->confirmed + neigh->parms->reachable_time)) {
+ NEIGH_PRINTK2("neigh %p is still alive.\n", neigh);
+ next = neigh->confirmed + neigh->parms->reachable_time;
+ } else if (time_before_eq(now,
+ neigh->used + neigh->parms->delay_probe_time)) {
+ NEIGH_PRINTK2("neigh %p is delayed.\n", neigh);
+ neigh->nud_state = NUD_DELAY;
+ neigh_suspect(neigh);
+ next = now + neigh->parms->delay_probe_time;
+ } else {
+ NEIGH_PRINTK2("neigh %p is suspected.\n", neigh);
+ neigh->nud_state = NUD_STALE;
+ neigh_suspect(neigh);
+ }
+ } else if (state & NUD_DELAY) {
+ if (time_before_eq(now,
+ neigh->confirmed + neigh->parms->delay_probe_time)) {
+ NEIGH_PRINTK2("neigh %p is now reachable.\n", neigh);
+ neigh->nud_state = NUD_REACHABLE;
+ neigh_connect(neigh);
+ next = neigh->confirmed + neigh->parms->reachable_time;
+ } else {
+ NEIGH_PRINTK2("neigh %p is probed.\n", neigh);
+ neigh->nud_state = NUD_PROBE;
+ atomic_set(&neigh->probes, 0);
+ next = now + neigh->parms->retrans_time;
+ }
+ } else {
+ /* NUD_PROBE|NUD_INCOMPLETE */
+ next = now + neigh->parms->retrans_time;
+ }
+
+ if ((neigh->nud_state & (NUD_INCOMPLETE | NUD_PROBE)) &&
+ atomic_read(&neigh->probes) >= neigh_max_probes(neigh)) {
+ struct sk_buff *skb;
+
+ neigh->nud_state = NUD_FAILED;
+ notify = 1;
+ NEIGH_CACHE_STAT_INC(neigh->tbl, res_failed);
+ NEIGH_PRINTK2("neigh %p is failed.\n", neigh);
+
+ /* It is very thin place. report_unreachable is very complicated
+ routine. Particularly, it can hit the same neighbour entry!
+
+ So that, we try to be accurate and avoid dead loop. --ANK
+ */
+ while (neigh->nud_state == NUD_FAILED &&
+ (skb = __skb_dequeue(&neigh->arp_queue)) != NULL) {
+ write_unlock(&neigh->lock);
+ neigh->ops->error_report(neigh, skb);
+ write_lock(&neigh->lock);
+ }
+ skb_queue_purge(&neigh->arp_queue);
+ }
+
+ if (neigh->nud_state & NUD_IN_TIMER) {
+ neigh_hold(neigh);
+ if (time_before(next, jiffies + HZ/2))
+ next = jiffies + HZ/2;
+ neigh->timer.expires = next;
+ add_timer(&neigh->timer);
+ }
+ if (neigh->nud_state & (NUD_INCOMPLETE | NUD_PROBE)) {
+ struct sk_buff *skb = skb_peek(&neigh->arp_queue);
+ /* keep skb alive even if arp_queue overflows */
+ if (skb)
+ skb_get(skb);
+ write_unlock(&neigh->lock);
+ neigh->ops->solicit(neigh, skb);
+ atomic_inc(&neigh->probes);
+ if (skb)
+ kfree_skb(skb);
+ } else {
+out:
+ write_unlock(&neigh->lock);
+ }
+
+#ifdef CONFIG_ARPD
+ if (notify && neigh->parms->app_probes)
+ neigh_app_notify(neigh);
+#endif
+ neigh_release(neigh);
+}
+
+int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
+{
+ int rc;
+ unsigned long now;
+
+ write_lock_bh(&neigh->lock);
+
+ rc = 0;
+ if (neigh->nud_state & (NUD_CONNECTED | NUD_DELAY | NUD_PROBE))
+ goto out_unlock_bh;
+
+ now = jiffies;
+
+ if (!(neigh->nud_state & (NUD_STALE | NUD_INCOMPLETE))) {
+ if (neigh->parms->mcast_probes + neigh->parms->app_probes) {
+ atomic_set(&neigh->probes, neigh->parms->ucast_probes);
+ neigh->nud_state = NUD_INCOMPLETE;
+ neigh_hold(neigh);
+ neigh->timer.expires = now + 1;
+ add_timer(&neigh->timer);
+ } else {
+ neigh->nud_state = NUD_FAILED;
+ write_unlock_bh(&neigh->lock);
+
+ if (skb)
+ kfree_skb(skb);
+ return 1;
+ }
+ } else if (neigh->nud_state & NUD_STALE) {
+ NEIGH_PRINTK2("neigh %p is delayed.\n", neigh);
+ neigh_hold(neigh);
+ neigh->nud_state = NUD_DELAY;
+ neigh->timer.expires = jiffies + neigh->parms->delay_probe_time;
+ add_timer(&neigh->timer);
+ }
+
+ if (neigh->nud_state == NUD_INCOMPLETE) {
+ if (skb) {
+ if (skb_queue_len(&neigh->arp_queue) >=
+ neigh->parms->queue_len) {
+ struct sk_buff *buff;
+ buff = neigh->arp_queue.next;
+ __skb_unlink(buff, &neigh->arp_queue);
+ kfree_skb(buff);
+ }
+ __skb_queue_tail(&neigh->arp_queue, skb);
+ }
+ rc = 1;
+ }
+out_unlock_bh:
+ write_unlock_bh(&neigh->lock);
+ return rc;
+}
+
+static __inline__ void neigh_update_hhs(struct neighbour *neigh)
+{
+ struct hh_cache *hh;
+ void (*update)(struct hh_cache*, struct net_device*, unsigned char *) =
+ neigh->dev->header_cache_update;
+
+ if (update) {
+ for (hh = neigh->hh; hh; hh = hh->hh_next) {
+ write_lock_bh(&hh->hh_lock);
+ update(hh, neigh->dev, neigh->ha);
+ write_unlock_bh(&hh->hh_lock);
+ }
+ }
+}
+
+
+
+/* Generic update routine.
+ -- lladdr is new lladdr or NULL, if it is not supplied.
+ -- new is new state.
+ -- flags
+ NEIGH_UPDATE_F_OVERRIDE allows to override existing lladdr,
+ if it is different.
+ NEIGH_UPDATE_F_WEAK_OVERRIDE will suspect existing "connected"
+ lladdr instead of overriding it
+ if it is different.
+ It also allows to retain current state
+ if lladdr is unchanged.
+ NEIGH_UPDATE_F_ADMIN means that the change is administrative.
+
+ NEIGH_UPDATE_F_OVERRIDE_ISROUTER allows to override existing
+ NTF_ROUTER flag.
+ NEIGH_UPDATE_F_ISROUTER indicates if the neighbour is known as
+ a router.
+
+ Caller MUST hold reference count on the entry.
+ */
+
+int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
+ u32 flags)
+{
+ u8 old;
+ int err;
+#ifdef CONFIG_ARPD
+ int notify = 0;
+#endif
+ struct net_device *dev;
+ int update_isrouter = 0;
+
+ write_lock_bh(&neigh->lock);
+
+ dev = neigh->dev;
+ old = neigh->nud_state;
+ err = -EPERM;
+
+ if (!(flags & NEIGH_UPDATE_F_ADMIN) &&
+ (old & (NUD_NOARP | NUD_PERMANENT)))
+ goto out;
+
+ if (!(new & NUD_VALID)) {
+ neigh_del_timer(neigh);
+ if (old & NUD_CONNECTED)
+ neigh_suspect(neigh);
+ neigh->nud_state = new;
+ err = 0;
+#ifdef CONFIG_ARPD
+ notify = old & NUD_VALID;
+#endif
+ goto out;
+ }
+
+ /* Compare new lladdr with cached one */
+ if (!dev->addr_len) {
+ /* First case: device needs no address. */
+ lladdr = neigh->ha;
+ } else if (lladdr) {
+ /* The second case: if something is already cached
+ and a new address is proposed:
+ - compare new & old
+ - if they are different, check override flag
+ */
+ if ((old & NUD_VALID) &&
+ !memcmp(lladdr, neigh->ha, dev->addr_len))
+ lladdr = neigh->ha;
+ } else {
+ /* No address is supplied; if we know something,
+ use it, otherwise discard the request.
+ */
+ err = -EINVAL;
+ if (!(old & NUD_VALID))
+ goto out;
+ lladdr = neigh->ha;
+ }
+
+ if (new & NUD_CONNECTED)
+ neigh->confirmed = jiffies;
+ neigh->updated = jiffies;
+
+ /* If entry was valid and address is not changed,
+ do not change entry state, if new one is STALE.
+ */
+ err = 0;
+ update_isrouter = flags & NEIGH_UPDATE_F_OVERRIDE_ISROUTER;
+ if (old & NUD_VALID) {
+ if (lladdr != neigh->ha && !(flags & NEIGH_UPDATE_F_OVERRIDE)) {
+ update_isrouter = 0;
+ if ((flags & NEIGH_UPDATE_F_WEAK_OVERRIDE) &&
+ (old & NUD_CONNECTED)) {
+ lladdr = neigh->ha;
+ new = NUD_STALE;
+ } else
+ goto out;
+ } else {
+ if (lladdr == neigh->ha && new == NUD_STALE &&
+ ((flags & NEIGH_UPDATE_F_WEAK_OVERRIDE) ||
+ (old & NUD_CONNECTED))
+ )
+ new = old;
+ }
+ }
+
+ if (new != old) {
+ neigh_del_timer(neigh);
+ if (new & NUD_IN_TIMER) {
+ neigh_hold(neigh);
+ neigh->timer.expires = jiffies +
+ ((new & NUD_REACHABLE) ?
+ neigh->parms->reachable_time : 0);
+ add_timer(&neigh->timer);
+ }
+ neigh->nud_state = new;
+ }
+
+ if (lladdr != neigh->ha) {
+ memcpy(&neigh->ha, lladdr, dev->addr_len);
+ neigh_update_hhs(neigh);
+ if (!(new & NUD_CONNECTED))
+ neigh->confirmed = jiffies -
+ (neigh->parms->base_reachable_time << 1);
+#ifdef CONFIG_ARPD
+ notify = 1;
+#endif
+ }
+ if (new == old)
+ goto out;
+ if (new & NUD_CONNECTED)
+ neigh_connect(neigh);
+ else
+ neigh_suspect(neigh);
+ if (!(old & NUD_VALID)) {
+ struct sk_buff *skb;
+
+ /* Again: avoid dead loop if something went wrong */
+
+ while (neigh->nud_state & NUD_VALID &&
+ (skb = __skb_dequeue(&neigh->arp_queue)) != NULL) {
+ struct neighbour *n1 = neigh;
+ write_unlock_bh(&neigh->lock);
+ /* On shaper/eql skb->dst->neighbour != neigh :( */
+ if (skb->dst && skb->dst->neighbour)
+ n1 = skb->dst->neighbour;
+ n1->output(skb);
+ write_lock_bh(&neigh->lock);
+ }
+ skb_queue_purge(&neigh->arp_queue);
+ }
+out:
+ if (update_isrouter) {
+ neigh->flags = (flags & NEIGH_UPDATE_F_ISROUTER) ?
+ (neigh->flags | NTF_ROUTER) :
+ (neigh->flags & ~NTF_ROUTER);
+ }
+ write_unlock_bh(&neigh->lock);
+#ifdef CONFIG_ARPD
+ if (notify && neigh->parms->app_probes)
+ neigh_app_notify(neigh);
+#endif
+ return err;
+}
+
+struct neighbour *neigh_event_ns(struct neigh_table *tbl,
+ u8 *lladdr, void *saddr,
+ struct net_device *dev)
+{
+ struct neighbour *neigh = __neigh_lookup(tbl, saddr, dev,
+ lladdr || !dev->addr_len);
+ if (neigh)
+ neigh_update(neigh, lladdr, NUD_STALE,
+ NEIGH_UPDATE_F_OVERRIDE);
+ return neigh;
+}
+
+static void neigh_hh_init(struct neighbour *n, struct dst_entry *dst,
+ u16 protocol)
+{
+ struct hh_cache *hh;
+ struct net_device *dev = dst->dev;
+
+ for (hh = n->hh; hh; hh = hh->hh_next)
+ if (hh->hh_type == protocol)
+ break;
+
+ if (!hh && (hh = kmalloc(sizeof(*hh), GFP_ATOMIC)) != NULL) {
+ memset(hh, 0, sizeof(struct hh_cache));
+ rwlock_init(&hh->hh_lock);
+ hh->hh_type = protocol;
+ atomic_set(&hh->hh_refcnt, 0);
+ hh->hh_next = NULL;
+ if (dev->hard_header_cache(n, hh)) {
+ kfree(hh);
+ hh = NULL;
+ } else {
+ atomic_inc(&hh->hh_refcnt);
+ hh->hh_next = n->hh;
+ n->hh = hh;
+ if (n->nud_state & NUD_CONNECTED)
+ hh->hh_output = n->ops->hh_output;
+ else
+ hh->hh_output = n->ops->output;
+ }
+ }
+ if (hh) {
+ atomic_inc(&hh->hh_refcnt);
+ dst->hh = hh;
+ }
+}
+
+/* This function can be used in contexts, where only old dev_queue_xmit
+ worked, f.e. if you want to override normal output path (eql, shaper),
+ but resolution is not made yet.
+ */
+
+int neigh_compat_output(struct sk_buff *skb)
+{
+ struct net_device *dev = skb->dev;
+
+ __skb_pull(skb, skb->nh.raw - skb->data);
+
+ if (dev->hard_header &&
+ dev->hard_header(skb, dev, ntohs(skb->protocol), NULL, NULL,
+ skb->len) < 0 &&
+ dev->rebuild_header(skb))
+ return 0;
+
+ return dev_queue_xmit(skb);
+}
+
+/* Slow and careful. */
+
+int neigh_resolve_output(struct sk_buff *skb)
+{
+ struct dst_entry *dst = skb->dst;
+ struct neighbour *neigh;
+ int rc = 0;
+
+ if (!dst || !(neigh = dst->neighbour))
+ goto discard;
+
+ __skb_pull(skb, skb->nh.raw - skb->data);
+
+ if (!neigh_event_send(neigh, skb)) {
+ int err;
+ struct net_device *dev = neigh->dev;
+ if (dev->hard_header_cache && !dst->hh) {
+ write_lock_bh(&neigh->lock);
+ if (!dst->hh)
+ neigh_hh_init(neigh, dst, dst->ops->protocol);
+ err = dev->hard_header(skb, dev, ntohs(skb->protocol),
+ neigh->ha, NULL, skb->len);
+ write_unlock_bh(&neigh->lock);
+ } else {
+ read_lock_bh(&neigh->lock);
+ err = dev->hard_header(skb, dev, ntohs(skb->protocol),
+ neigh->ha, NULL, skb->len);
+ read_unlock_bh(&neigh->lock);
+ }
+ if (err >= 0)
+ rc = neigh->ops->queue_xmit(skb);
+ else
+ goto out_kfree_skb;
+ }
+out:
+ return rc;
+discard:
+ NEIGH_PRINTK1("neigh_resolve_output: dst=%p neigh=%p\n",
+ dst, dst ? dst->neighbour : NULL);
+out_kfree_skb:
+ rc = -EINVAL;
+ kfree_skb(skb);
+ goto out;
+}
+
+/* As fast as possible without hh cache */
+
+int neigh_connected_output(struct sk_buff *skb)
+{
+ int err;
+ struct dst_entry *dst = skb->dst;
+ struct neighbour *neigh = dst->neighbour;
+ struct net_device *dev = neigh->dev;
+
+ __skb_pull(skb, skb->nh.raw - skb->data);
+
+ read_lock_bh(&neigh->lock);
+ err = dev->hard_header(skb, dev, ntohs(skb->protocol),
+ neigh->ha, NULL, skb->len);
+ read_unlock_bh(&neigh->lock);
+ if (err >= 0)
+ err = neigh->ops->queue_xmit(skb);
+ else {
+ err = -EINVAL;
+ kfree_skb(skb);
+ }
+ return err;
+}
+
+static void neigh_proxy_process(unsigned long arg)
+{
+ struct neigh_table *tbl = (struct neigh_table *)arg;
+ long sched_next = 0;
+ unsigned long now = jiffies;
+ struct sk_buff *skb;
+
+ spin_lock(&tbl->proxy_queue.lock);
+
+ skb = tbl->proxy_queue.next;
+
+ while (skb != (struct sk_buff *)&tbl->proxy_queue) {
+ struct sk_buff *back = skb;
+ long tdif = back->stamp.tv_usec - now;
+
+ skb = skb->next;
+ if (tdif <= 0) {
+ struct net_device *dev = back->dev;
+ __skb_unlink(back, &tbl->proxy_queue);
+ if (tbl->proxy_redo && netif_running(dev))
+ tbl->proxy_redo(back);
+ else
+ kfree_skb(back);
+
+ dev_put(dev);
+ } else if (!sched_next || tdif < sched_next)
+ sched_next = tdif;
+ }
+ del_timer(&tbl->proxy_timer);
+ if (sched_next)
+ mod_timer(&tbl->proxy_timer, jiffies + sched_next);
+ spin_unlock(&tbl->proxy_queue.lock);
+}
+
+void pneigh_enqueue(struct neigh_table *tbl, struct neigh_parms *p,
+ struct sk_buff *skb)
+{
+ unsigned long now = jiffies;
+ unsigned long sched_next = now + (net_random() % p->proxy_delay);
+
+ if (tbl->proxy_queue.qlen > p->proxy_qlen) {
+ kfree_skb(skb);
+ return;
+ }
+ skb->stamp.tv_sec = LOCALLY_ENQUEUED;
+ skb->stamp.tv_usec = sched_next;
+
+ spin_lock(&tbl->proxy_queue.lock);
+ if (del_timer(&tbl->proxy_timer)) {
+ if (time_before(tbl->proxy_timer.expires, sched_next))
+ sched_next = tbl->proxy_timer.expires;
+ }
+ dst_release(skb->dst);
+ skb->dst = NULL;
+ dev_hold(skb->dev);
+ __skb_queue_tail(&tbl->proxy_queue, skb);
+ mod_timer(&tbl->proxy_timer, sched_next);
+ spin_unlock(&tbl->proxy_queue.lock);
+}
+
+
+struct neigh_parms *neigh_parms_alloc(struct net_device *dev,
+ struct neigh_table *tbl)
+{
+ struct neigh_parms *p = kmalloc(sizeof(*p), GFP_KERNEL);
+
+ if (p) {
+ memcpy(p, &tbl->parms, sizeof(*p));
+ p->tbl = tbl;
+ atomic_set(&p->refcnt, 1);
+ INIT_RCU_HEAD(&p->rcu_head);
+ p->reachable_time =
+ neigh_rand_reach_time(p->base_reachable_time);
+ if (dev && dev->neigh_setup && dev->neigh_setup(dev, p)) {
+ kfree(p);
+ return NULL;
+ }
+ p->sysctl_table = NULL;
+ write_lock_bh(&tbl->lock);
+ p->next = tbl->parms.next;
+ tbl->parms.next = p;
+ write_unlock_bh(&tbl->lock);
+ }
+ return p;
+}
+
+static void neigh_rcu_free_parms(struct rcu_head *head)
+{
+ struct neigh_parms *parms =
+ container_of(head, struct neigh_parms, rcu_head);
+
+ neigh_parms_put(parms);
+}
+
+void neigh_parms_release(struct neigh_table *tbl, struct neigh_parms *parms)
+{
+ struct neigh_parms **p;
+
+ if (!parms || parms == &tbl->parms)
+ return;
+ write_lock_bh(&tbl->lock);
+ for (p = &tbl->parms.next; *p; p = &(*p)->next) {
+ if (*p == parms) {
+ *p = parms->next;
+ parms->dead = 1;
+ write_unlock_bh(&tbl->lock);
+ call_rcu(&parms->rcu_head, neigh_rcu_free_parms);
+ return;
+ }
+ }
+ write_unlock_bh(&tbl->lock);
+ NEIGH_PRINTK1("neigh_parms_release: not found\n");
+}
+
+void neigh_parms_destroy(struct neigh_parms *parms)
+{
+ kfree(parms);
+}
+
+
+void neigh_table_init(struct neigh_table *tbl)
+{
+ unsigned long now = jiffies;
+ unsigned long phsize;
+
+ atomic_set(&tbl->parms.refcnt, 1);
+ INIT_RCU_HEAD(&tbl->parms.rcu_head);
+ tbl->parms.reachable_time =
+ neigh_rand_reach_time(tbl->parms.base_reachable_time);
+
+ if (!tbl->kmem_cachep)
+ tbl->kmem_cachep = kmem_cache_create(tbl->id,
+ tbl->entry_size,
+ 0, SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
+
+ if (!tbl->kmem_cachep)
+ panic("cannot create neighbour cache");
+
+ tbl->stats = alloc_percpu(struct neigh_statistics);
+ if (!tbl->stats)
+ panic("cannot create neighbour cache statistics");
+
+#ifdef CONFIG_PROC_FS
+ tbl->pde = create_proc_entry(tbl->id, 0, proc_net_stat);
+ if (!tbl->pde)
+ panic("cannot create neighbour proc dir entry");
+ tbl->pde->proc_fops = &neigh_stat_seq_fops;
+ tbl->pde->data = tbl;
+#endif
+
+ tbl->hash_mask = 1;
+ tbl->hash_buckets = neigh_hash_alloc(tbl->hash_mask + 1);
+
+ phsize = (PNEIGH_HASHMASK + 1) * sizeof(struct pneigh_entry *);
+ tbl->phash_buckets = kmalloc(phsize, GFP_KERNEL);
+
+ if (!tbl->hash_buckets || !tbl->phash_buckets)
+ panic("cannot allocate neighbour cache hashes");
+
+ memset(tbl->phash_buckets, 0, phsize);
+
+ get_random_bytes(&tbl->hash_rnd, sizeof(tbl->hash_rnd));
+
+ rwlock_init(&tbl->lock);
+ init_timer(&tbl->gc_timer);
+ tbl->gc_timer.data = (unsigned long)tbl;
+ tbl->gc_timer.function = neigh_periodic_timer;
+ tbl->gc_timer.expires = now + 1;
+ add_timer(&tbl->gc_timer);
+
+ init_timer(&tbl->proxy_timer);
+ tbl->proxy_timer.data = (unsigned long)tbl;
+ tbl->proxy_timer.function = neigh_proxy_process;
+ skb_queue_head_init(&tbl->proxy_queue);
+
+ tbl->last_flush = now;
+ tbl->last_rand = now + tbl->parms.reachable_time * 20;
+ write_lock(&neigh_tbl_lock);
+ tbl->next = neigh_tables;
+ neigh_tables = tbl;
+ write_unlock(&neigh_tbl_lock);
+}
+
+int neigh_table_clear(struct neigh_table *tbl)
+{
+ struct neigh_table **tp;
+
+ /* It is not clean... Fix it to unload IPv6 module safely */
+ del_timer_sync(&tbl->gc_timer);
+ del_timer_sync(&tbl->proxy_timer);
+ pneigh_queue_purge(&tbl->proxy_queue);
+ neigh_ifdown(tbl, NULL);
+ if (atomic_read(&tbl->entries))
+ printk(KERN_CRIT "neighbour leakage\n");
+ write_lock(&neigh_tbl_lock);
+ for (tp = &neigh_tables; *tp; tp = &(*tp)->next) {
+ if (*tp == tbl) {
+ *tp = tbl->next;
+ break;
+ }
+ }
+ write_unlock(&neigh_tbl_lock);
+
+ neigh_hash_free(tbl->hash_buckets, tbl->hash_mask + 1);
+ tbl->hash_buckets = NULL;
+
+ kfree(tbl->phash_buckets);
+ tbl->phash_buckets = NULL;
+
+ return 0;
+}
+
+int neigh_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct ndmsg *ndm = NLMSG_DATA(nlh);
+ struct rtattr **nda = arg;
+ struct neigh_table *tbl;
+ struct net_device *dev = NULL;
+ int err = -ENODEV;
+
+ if (ndm->ndm_ifindex &&
+ (dev = dev_get_by_index(ndm->ndm_ifindex)) == NULL)
+ goto out;
+
+ read_lock(&neigh_tbl_lock);
+ for (tbl = neigh_tables; tbl; tbl = tbl->next) {
+ struct rtattr *dst_attr = nda[NDA_DST - 1];
+ struct neighbour *n;
+
+ if (tbl->family != ndm->ndm_family)
+ continue;
+ read_unlock(&neigh_tbl_lock);
+
+ err = -EINVAL;
+ if (!dst_attr || RTA_PAYLOAD(dst_attr) < tbl->key_len)
+ goto out_dev_put;
+
+ if (ndm->ndm_flags & NTF_PROXY) {
+ err = pneigh_delete(tbl, RTA_DATA(dst_attr), dev);
+ goto out_dev_put;
+ }
+
+ if (!dev)
+ goto out;
+
+ n = neigh_lookup(tbl, RTA_DATA(dst_attr), dev);
+ if (n) {
+ err = neigh_update(n, NULL, NUD_FAILED,
+ NEIGH_UPDATE_F_OVERRIDE|
+ NEIGH_UPDATE_F_ADMIN);
+ neigh_release(n);
+ }
+ goto out_dev_put;
+ }
+ read_unlock(&neigh_tbl_lock);
+ err = -EADDRNOTAVAIL;
+out_dev_put:
+ if (dev)
+ dev_put(dev);
+out:
+ return err;
+}
+
+int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct ndmsg *ndm = NLMSG_DATA(nlh);
+ struct rtattr **nda = arg;
+ struct neigh_table *tbl;
+ struct net_device *dev = NULL;
+ int err = -ENODEV;
+
+ if (ndm->ndm_ifindex &&
+ (dev = dev_get_by_index(ndm->ndm_ifindex)) == NULL)
+ goto out;
+
+ read_lock(&neigh_tbl_lock);
+ for (tbl = neigh_tables; tbl; tbl = tbl->next) {
+ struct rtattr *lladdr_attr = nda[NDA_LLADDR - 1];
+ struct rtattr *dst_attr = nda[NDA_DST - 1];
+ int override = 1;
+ struct neighbour *n;
+
+ if (tbl->family != ndm->ndm_family)
+ continue;
+ read_unlock(&neigh_tbl_lock);
+
+ err = -EINVAL;
+ if (!dst_attr || RTA_PAYLOAD(dst_attr) < tbl->key_len)
+ goto out_dev_put;
+
+ if (ndm->ndm_flags & NTF_PROXY) {
+ err = -ENOBUFS;
+ if (pneigh_lookup(tbl, RTA_DATA(dst_attr), dev, 1))
+ err = 0;
+ goto out_dev_put;
+ }
+
+ err = -EINVAL;
+ if (!dev)
+ goto out;
+ if (lladdr_attr && RTA_PAYLOAD(lladdr_attr) < dev->addr_len)
+ goto out_dev_put;
+
+ n = neigh_lookup(tbl, RTA_DATA(dst_attr), dev);
+ if (n) {
+ if (nlh->nlmsg_flags & NLM_F_EXCL) {
+ err = -EEXIST;
+ neigh_release(n);
+ goto out_dev_put;
+ }
+
+ override = nlh->nlmsg_flags & NLM_F_REPLACE;
+ } else if (!(nlh->nlmsg_flags & NLM_F_CREATE)) {
+ err = -ENOENT;
+ goto out_dev_put;
+ } else {
+ n = __neigh_lookup_errno(tbl, RTA_DATA(dst_attr), dev);
+ if (IS_ERR(n)) {
+ err = PTR_ERR(n);
+ goto out_dev_put;
+ }
+ }
+
+ err = neigh_update(n,
+ lladdr_attr ? RTA_DATA(lladdr_attr) : NULL,
+ ndm->ndm_state,
+ (override ? NEIGH_UPDATE_F_OVERRIDE : 0) |
+ NEIGH_UPDATE_F_ADMIN);
+
+ neigh_release(n);
+ goto out_dev_put;
+ }
+
+ read_unlock(&neigh_tbl_lock);
+ err = -EADDRNOTAVAIL;
+out_dev_put:
+ if (dev)
+ dev_put(dev);
+out:
+ return err;
+}
+
+
+static int neigh_fill_info(struct sk_buff *skb, struct neighbour *n,
+ u32 pid, u32 seq, int event)
+{
+ unsigned long now = jiffies;
+ unsigned char *b = skb->tail;
+ struct nda_cacheinfo ci;
+ int locked = 0;
+ u32 probes;
+ struct nlmsghdr *nlh = NLMSG_PUT(skb, pid, seq, event,
+ sizeof(struct ndmsg));
+ struct ndmsg *ndm = NLMSG_DATA(nlh);
+
+ nlh->nlmsg_flags = pid ? NLM_F_MULTI : 0;
+ ndm->ndm_family = n->ops->family;
+ ndm->ndm_flags = n->flags;
+ ndm->ndm_type = n->type;
+ ndm->ndm_ifindex = n->dev->ifindex;
+ RTA_PUT(skb, NDA_DST, n->tbl->key_len, n->primary_key);
+ read_lock_bh(&n->lock);
+ locked = 1;
+ ndm->ndm_state = n->nud_state;
+ if (n->nud_state & NUD_VALID)
+ RTA_PUT(skb, NDA_LLADDR, n->dev->addr_len, n->ha);
+ ci.ndm_used = now - n->used;
+ ci.ndm_confirmed = now - n->confirmed;
+ ci.ndm_updated = now - n->updated;
+ ci.ndm_refcnt = atomic_read(&n->refcnt) - 1;
+ probes = atomic_read(&n->probes);
+ read_unlock_bh(&n->lock);
+ locked = 0;
+ RTA_PUT(skb, NDA_CACHEINFO, sizeof(ci), &ci);
+ RTA_PUT(skb, NDA_PROBES, sizeof(probes), &probes);
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ if (locked)
+ read_unlock_bh(&n->lock);
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+
+static int neigh_dump_table(struct neigh_table *tbl, struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct neighbour *n;
+ int rc, h, s_h = cb->args[1];
+ int idx, s_idx = idx = cb->args[2];
+
+ for (h = 0; h <= tbl->hash_mask; h++) {
+ if (h < s_h)
+ continue;
+ if (h > s_h)
+ s_idx = 0;
+ read_lock_bh(&tbl->lock);
+ for (n = tbl->hash_buckets[h], idx = 0; n; n = n->next, idx++) {
+ if (idx < s_idx)
+ continue;
+ if (neigh_fill_info(skb, n, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq,
+ RTM_NEWNEIGH) <= 0) {
+ read_unlock_bh(&tbl->lock);
+ rc = -1;
+ goto out;
+ }
+ }
+ read_unlock_bh(&tbl->lock);
+ }
+ rc = skb->len;
+out:
+ cb->args[1] = h;
+ cb->args[2] = idx;
+ return rc;
+}
+
+int neigh_dump_info(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct neigh_table *tbl;
+ int t, family, s_t;
+
+ read_lock(&neigh_tbl_lock);
+ family = ((struct rtgenmsg *)NLMSG_DATA(cb->nlh))->rtgen_family;
+ s_t = cb->args[0];
+
+ for (tbl = neigh_tables, t = 0; tbl; tbl = tbl->next, t++) {
+ if (t < s_t || (family && tbl->family != family))
+ continue;
+ if (t > s_t)
+ memset(&cb->args[1], 0, sizeof(cb->args) -
+ sizeof(cb->args[0]));
+ if (neigh_dump_table(tbl, skb, cb) < 0)
+ break;
+ }
+ read_unlock(&neigh_tbl_lock);
+
+ cb->args[0] = t;
+ return skb->len;
+}
+
+void neigh_for_each(struct neigh_table *tbl, void (*cb)(struct neighbour *, void *), void *cookie)
+{
+ int chain;
+
+ read_lock_bh(&tbl->lock);
+ for (chain = 0; chain <= tbl->hash_mask; chain++) {
+ struct neighbour *n;
+
+ for (n = tbl->hash_buckets[chain]; n; n = n->next)
+ cb(n, cookie);
+ }
+ read_unlock_bh(&tbl->lock);
+}
+EXPORT_SYMBOL(neigh_for_each);
+
+/* The tbl->lock must be held as a writer and BH disabled. */
+void __neigh_for_each_release(struct neigh_table *tbl,
+ int (*cb)(struct neighbour *))
+{
+ int chain;
+
+ for (chain = 0; chain <= tbl->hash_mask; chain++) {
+ struct neighbour *n, **np;
+
+ np = &tbl->hash_buckets[chain];
+ while ((n = *np) != NULL) {
+ int release;
+
+ write_lock(&n->lock);
+ release = cb(n);
+ if (release) {
+ *np = n->next;
+ n->dead = 1;
+ } else
+ np = &n->next;
+ write_unlock(&n->lock);
+ if (release)
+ neigh_release(n);
+ }
+ }
+}
+EXPORT_SYMBOL(__neigh_for_each_release);
+
+#ifdef CONFIG_PROC_FS
+
+static struct neighbour *neigh_get_first(struct seq_file *seq)
+{
+ struct neigh_seq_state *state = seq->private;
+ struct neigh_table *tbl = state->tbl;
+ struct neighbour *n = NULL;
+ int bucket = state->bucket;
+
+ state->flags &= ~NEIGH_SEQ_IS_PNEIGH;
+ for (bucket = 0; bucket <= tbl->hash_mask; bucket++) {
+ n = tbl->hash_buckets[bucket];
+
+ while (n) {
+ if (state->neigh_sub_iter) {
+ loff_t fakep = 0;
+ void *v;
+
+ v = state->neigh_sub_iter(state, n, &fakep);
+ if (!v)
+ goto next;
+ }
+ if (!(state->flags & NEIGH_SEQ_SKIP_NOARP))
+ break;
+ if (n->nud_state & ~NUD_NOARP)
+ break;
+ next:
+ n = n->next;
+ }
+
+ if (n)
+ break;
+ }
+ state->bucket = bucket;
+
+ return n;
+}
+
+static struct neighbour *neigh_get_next(struct seq_file *seq,
+ struct neighbour *n,
+ loff_t *pos)
+{
+ struct neigh_seq_state *state = seq->private;
+ struct neigh_table *tbl = state->tbl;
+
+ if (state->neigh_sub_iter) {
+ void *v = state->neigh_sub_iter(state, n, pos);
+ if (v)
+ return n;
+ }
+ n = n->next;
+
+ while (1) {
+ while (n) {
+ if (state->neigh_sub_iter) {
+ void *v = state->neigh_sub_iter(state, n, pos);
+ if (v)
+ return n;
+ goto next;
+ }
+ if (!(state->flags & NEIGH_SEQ_SKIP_NOARP))
+ break;
+
+ if (n->nud_state & ~NUD_NOARP)
+ break;
+ next:
+ n = n->next;
+ }
+
+ if (n)
+ break;
+
+ if (++state->bucket > tbl->hash_mask)
+ break;
+
+ n = tbl->hash_buckets[state->bucket];
+ }
+
+ if (n && pos)
+ --(*pos);
+ return n;
+}
+
+static struct neighbour *neigh_get_idx(struct seq_file *seq, loff_t *pos)
+{
+ struct neighbour *n = neigh_get_first(seq);
+
+ if (n) {
+ while (*pos) {
+ n = neigh_get_next(seq, n, pos);
+ if (!n)
+ break;
+ }
+ }
+ return *pos ? NULL : n;
+}
+
+static struct pneigh_entry *pneigh_get_first(struct seq_file *seq)
+{
+ struct neigh_seq_state *state = seq->private;
+ struct neigh_table *tbl = state->tbl;
+ struct pneigh_entry *pn = NULL;
+ int bucket = state->bucket;
+
+ state->flags |= NEIGH_SEQ_IS_PNEIGH;
+ for (bucket = 0; bucket <= PNEIGH_HASHMASK; bucket++) {
+ pn = tbl->phash_buckets[bucket];
+ if (pn)
+ break;
+ }
+ state->bucket = bucket;
+
+ return pn;
+}
+
+static struct pneigh_entry *pneigh_get_next(struct seq_file *seq,
+ struct pneigh_entry *pn,
+ loff_t *pos)
+{
+ struct neigh_seq_state *state = seq->private;
+ struct neigh_table *tbl = state->tbl;
+
+ pn = pn->next;
+ while (!pn) {
+ if (++state->bucket > PNEIGH_HASHMASK)
+ break;
+ pn = tbl->phash_buckets[state->bucket];
+ if (pn)
+ break;
+ }
+
+ if (pn && pos)
+ --(*pos);
+
+ return pn;
+}
+
+static struct pneigh_entry *pneigh_get_idx(struct seq_file *seq, loff_t *pos)
+{
+ struct pneigh_entry *pn = pneigh_get_first(seq);
+
+ if (pn) {
+ while (*pos) {
+ pn = pneigh_get_next(seq, pn, pos);
+ if (!pn)
+ break;
+ }
+ }
+ return *pos ? NULL : pn;
+}
+
+static void *neigh_get_idx_any(struct seq_file *seq, loff_t *pos)
+{
+ struct neigh_seq_state *state = seq->private;
+ void *rc;
+
+ rc = neigh_get_idx(seq, pos);
+ if (!rc && !(state->flags & NEIGH_SEQ_NEIGH_ONLY))
+ rc = pneigh_get_idx(seq, pos);
+
+ return rc;
+}
+
+void *neigh_seq_start(struct seq_file *seq, loff_t *pos, struct neigh_table *tbl, unsigned int neigh_seq_flags)
+{
+ struct neigh_seq_state *state = seq->private;
+ loff_t pos_minus_one;
+
+ state->tbl = tbl;
+ state->bucket = 0;
+ state->flags = (neigh_seq_flags & ~NEIGH_SEQ_IS_PNEIGH);
+
+ read_lock_bh(&tbl->lock);
+
+ pos_minus_one = *pos - 1;
+ return *pos ? neigh_get_idx_any(seq, &pos_minus_one) : SEQ_START_TOKEN;
+}
+EXPORT_SYMBOL(neigh_seq_start);
+
+void *neigh_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct neigh_seq_state *state;
+ void *rc;
+
+ if (v == SEQ_START_TOKEN) {
+ rc = neigh_get_idx(seq, pos);
+ goto out;
+ }
+
+ state = seq->private;
+ if (!(state->flags & NEIGH_SEQ_IS_PNEIGH)) {
+ rc = neigh_get_next(seq, v, NULL);
+ if (rc)
+ goto out;
+ if (!(state->flags & NEIGH_SEQ_NEIGH_ONLY))
+ rc = pneigh_get_first(seq);
+ } else {
+ BUG_ON(state->flags & NEIGH_SEQ_NEIGH_ONLY);
+ rc = pneigh_get_next(seq, v, NULL);
+ }
+out:
+ ++(*pos);
+ return rc;
+}
+EXPORT_SYMBOL(neigh_seq_next);
+
+void neigh_seq_stop(struct seq_file *seq, void *v)
+{
+ struct neigh_seq_state *state = seq->private;
+ struct neigh_table *tbl = state->tbl;
+
+ read_unlock_bh(&tbl->lock);
+}
+EXPORT_SYMBOL(neigh_seq_stop);
+
+/* statistics via seq_file */
+
+static void *neigh_stat_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct proc_dir_entry *pde = seq->private;
+ struct neigh_table *tbl = pde->data;
+ int cpu;
+
+ if (*pos == 0)
+ return SEQ_START_TOKEN;
+
+ for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
+ if (!cpu_possible(cpu))
+ continue;
+ *pos = cpu+1;
+ return per_cpu_ptr(tbl->stats, cpu);
+ }
+ return NULL;
+}
+
+static void *neigh_stat_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct proc_dir_entry *pde = seq->private;
+ struct neigh_table *tbl = pde->data;
+ int cpu;
+
+ for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
+ if (!cpu_possible(cpu))
+ continue;
+ *pos = cpu+1;
+ return per_cpu_ptr(tbl->stats, cpu);
+ }
+ return NULL;
+}
+
+static void neigh_stat_seq_stop(struct seq_file *seq, void *v)
+{
+
+}
+
+static int neigh_stat_seq_show(struct seq_file *seq, void *v)
+{
+ struct proc_dir_entry *pde = seq->private;
+ struct neigh_table *tbl = pde->data;
+ struct neigh_statistics *st = v;
+
+ if (v == SEQ_START_TOKEN) {
+ seq_printf(seq, "entries allocs destroys hash_grows lookups hits res_failed rcv_probes_mcast rcv_probes_ucast periodic_gc_runs forced_gc_runs forced_gc_goal_miss\n");
+ return 0;
+ }
+
+ seq_printf(seq, "%08x %08lx %08lx %08lx %08lx %08lx %08lx "
+ "%08lx %08lx %08lx %08lx\n",
+ atomic_read(&tbl->entries),
+
+ st->allocs,
+ st->destroys,
+ st->hash_grows,
+
+ st->lookups,
+ st->hits,
+
+ st->res_failed,
+
+ st->rcv_probes_mcast,
+ st->rcv_probes_ucast,
+
+ st->periodic_gc_runs,
+ st->forced_gc_runs
+ );
+
+ return 0;
+}
+
+static struct seq_operations neigh_stat_seq_ops = {
+ .start = neigh_stat_seq_start,
+ .next = neigh_stat_seq_next,
+ .stop = neigh_stat_seq_stop,
+ .show = neigh_stat_seq_show,
+};
+
+static int neigh_stat_seq_open(struct inode *inode, struct file *file)
+{
+ int ret = seq_open(file, &neigh_stat_seq_ops);
+
+ if (!ret) {
+ struct seq_file *sf = file->private_data;
+ sf->private = PDE(inode);
+ }
+ return ret;
+};
+
+static struct file_operations neigh_stat_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = neigh_stat_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#endif /* CONFIG_PROC_FS */
+
+#ifdef CONFIG_ARPD
+void neigh_app_ns(struct neighbour *n)
+{
+ struct nlmsghdr *nlh;
+ int size = NLMSG_SPACE(sizeof(struct ndmsg) + 256);
+ struct sk_buff *skb = alloc_skb(size, GFP_ATOMIC);
+
+ if (!skb)
+ return;
+
+ if (neigh_fill_info(skb, n, 0, 0, RTM_GETNEIGH) < 0) {
+ kfree_skb(skb);
+ return;
+ }
+ nlh = (struct nlmsghdr *)skb->data;
+ nlh->nlmsg_flags = NLM_F_REQUEST;
+ NETLINK_CB(skb).dst_groups = RTMGRP_NEIGH;
+ netlink_broadcast(rtnl, skb, 0, RTMGRP_NEIGH, GFP_ATOMIC);
+}
+
+static void neigh_app_notify(struct neighbour *n)
+{
+ struct nlmsghdr *nlh;
+ int size = NLMSG_SPACE(sizeof(struct ndmsg) + 256);
+ struct sk_buff *skb = alloc_skb(size, GFP_ATOMIC);
+
+ if (!skb)
+ return;
+
+ if (neigh_fill_info(skb, n, 0, 0, RTM_NEWNEIGH) < 0) {
+ kfree_skb(skb);
+ return;
+ }
+ nlh = (struct nlmsghdr *)skb->data;
+ NETLINK_CB(skb).dst_groups = RTMGRP_NEIGH;
+ netlink_broadcast(rtnl, skb, 0, RTMGRP_NEIGH, GFP_ATOMIC);
+}
+
+#endif /* CONFIG_ARPD */
+
+#ifdef CONFIG_SYSCTL
+
+static struct neigh_sysctl_table {
+ struct ctl_table_header *sysctl_header;
+ ctl_table neigh_vars[__NET_NEIGH_MAX];
+ ctl_table neigh_dev[2];
+ ctl_table neigh_neigh_dir[2];
+ ctl_table neigh_proto_dir[2];
+ ctl_table neigh_root_dir[2];
+} neigh_sysctl_template = {
+ .neigh_vars = {
+ {
+ .ctl_name = NET_NEIGH_MCAST_SOLICIT,
+ .procname = "mcast_solicit",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_NEIGH_UCAST_SOLICIT,
+ .procname = "ucast_solicit",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_NEIGH_APP_SOLICIT,
+ .procname = "app_solicit",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_NEIGH_RETRANS_TIME,
+ .procname = "retrans_time",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_userhz_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_REACHABLE_TIME,
+ .procname = "base_reachable_time",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_DELAY_PROBE_TIME,
+ .procname = "delay_first_probe_time",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_GC_STALE_TIME,
+ .procname = "gc_stale_time",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_UNRES_QLEN,
+ .procname = "unres_qlen",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_NEIGH_PROXY_QLEN,
+ .procname = "proxy_qlen",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_NEIGH_ANYCAST_DELAY,
+ .procname = "anycast_delay",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_userhz_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_PROXY_DELAY,
+ .procname = "proxy_delay",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_userhz_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_LOCKTIME,
+ .procname = "locktime",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_userhz_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_GC_INTERVAL,
+ .procname = "gc_interval",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_GC_THRESH1,
+ .procname = "gc_thresh1",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_NEIGH_GC_THRESH2,
+ .procname = "gc_thresh2",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_NEIGH_GC_THRESH3,
+ .procname = "gc_thresh3",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_NEIGH_RETRANS_TIME_MS,
+ .procname = "retrans_time_ms",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_ms_jiffies,
+ .strategy = &sysctl_ms_jiffies,
+ },
+ {
+ .ctl_name = NET_NEIGH_REACHABLE_TIME_MS,
+ .procname = "base_reachable_time_ms",
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_ms_jiffies,
+ .strategy = &sysctl_ms_jiffies,
+ },
+ },
+ .neigh_dev = {
+ {
+ .ctl_name = NET_PROTO_CONF_DEFAULT,
+ .procname = "default",
+ .mode = 0555,
+ },
+ },
+ .neigh_neigh_dir = {
+ {
+ .procname = "neigh",
+ .mode = 0555,
+ },
+ },
+ .neigh_proto_dir = {
+ {
+ .mode = 0555,
+ },
+ },
+ .neigh_root_dir = {
+ {
+ .ctl_name = CTL_NET,
+ .procname = "net",
+ .mode = 0555,
+ },
+ },
+};
+
+int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
+ int p_id, int pdev_id, char *p_name,
+ proc_handler *handler, ctl_handler *strategy)
+{
+ struct neigh_sysctl_table *t = kmalloc(sizeof(*t), GFP_KERNEL);
+ const char *dev_name_source = NULL;
+ char *dev_name = NULL;
+ int err = 0;
+
+ if (!t)
+ return -ENOBUFS;
+ memcpy(t, &neigh_sysctl_template, sizeof(*t));
+ t->neigh_vars[0].data = &p->mcast_probes;
+ t->neigh_vars[1].data = &p->ucast_probes;
+ t->neigh_vars[2].data = &p->app_probes;
+ t->neigh_vars[3].data = &p->retrans_time;
+ t->neigh_vars[4].data = &p->base_reachable_time;
+ t->neigh_vars[5].data = &p->delay_probe_time;
+ t->neigh_vars[6].data = &p->gc_staletime;
+ t->neigh_vars[7].data = &p->queue_len;
+ t->neigh_vars[8].data = &p->proxy_qlen;
+ t->neigh_vars[9].data = &p->anycast_delay;
+ t->neigh_vars[10].data = &p->proxy_delay;
+ t->neigh_vars[11].data = &p->locktime;
+
+ if (dev) {
+ dev_name_source = dev->name;
+ t->neigh_dev[0].ctl_name = dev->ifindex;
+ t->neigh_vars[12].procname = NULL;
+ t->neigh_vars[13].procname = NULL;
+ t->neigh_vars[14].procname = NULL;
+ t->neigh_vars[15].procname = NULL;
+ } else {
+ dev_name_source = t->neigh_dev[0].procname;
+ t->neigh_vars[12].data = (int *)(p + 1);
+ t->neigh_vars[13].data = (int *)(p + 1) + 1;
+ t->neigh_vars[14].data = (int *)(p + 1) + 2;
+ t->neigh_vars[15].data = (int *)(p + 1) + 3;
+ }
+
+ t->neigh_vars[16].data = &p->retrans_time;
+ t->neigh_vars[17].data = &p->base_reachable_time;
+
+ if (handler || strategy) {
+ /* RetransTime */
+ t->neigh_vars[3].proc_handler = handler;
+ t->neigh_vars[3].strategy = strategy;
+ t->neigh_vars[3].extra1 = dev;
+ /* ReachableTime */
+ t->neigh_vars[4].proc_handler = handler;
+ t->neigh_vars[4].strategy = strategy;
+ t->neigh_vars[4].extra1 = dev;
+ /* RetransTime (in milliseconds)*/
+ t->neigh_vars[16].proc_handler = handler;
+ t->neigh_vars[16].strategy = strategy;
+ t->neigh_vars[16].extra1 = dev;
+ /* ReachableTime (in milliseconds) */
+ t->neigh_vars[17].proc_handler = handler;
+ t->neigh_vars[17].strategy = strategy;
+ t->neigh_vars[17].extra1 = dev;
+ }
+
+ dev_name = net_sysctl_strdup(dev_name_source);
+ if (!dev_name) {
+ err = -ENOBUFS;
+ goto free;
+ }
+
+ t->neigh_dev[0].procname = dev_name;
+
+ t->neigh_neigh_dir[0].ctl_name = pdev_id;
+
+ t->neigh_proto_dir[0].procname = p_name;
+ t->neigh_proto_dir[0].ctl_name = p_id;
+
+ t->neigh_dev[0].child = t->neigh_vars;
+ t->neigh_neigh_dir[0].child = t->neigh_dev;
+ t->neigh_proto_dir[0].child = t->neigh_neigh_dir;
+ t->neigh_root_dir[0].child = t->neigh_proto_dir;
+
+ t->sysctl_header = register_sysctl_table(t->neigh_root_dir, 0);
+ if (!t->sysctl_header) {
+ err = -ENOBUFS;
+ goto free_procname;
+ }
+ p->sysctl_table = t;
+ return 0;
+
+ /* error path */
+ free_procname:
+ kfree(dev_name);
+ free:
+ kfree(t);
+
+ return err;
+}
+
+void neigh_sysctl_unregister(struct neigh_parms *p)
+{
+ if (p->sysctl_table) {
+ struct neigh_sysctl_table *t = p->sysctl_table;
+ p->sysctl_table = NULL;
+ unregister_sysctl_table(t->sysctl_header);
+ kfree(t->neigh_dev[0].procname);
+ kfree(t);
+ }
+}
+
+#endif /* CONFIG_SYSCTL */
+
+EXPORT_SYMBOL(__neigh_event_send);
+EXPORT_SYMBOL(neigh_add);
+EXPORT_SYMBOL(neigh_changeaddr);
+EXPORT_SYMBOL(neigh_compat_output);
+EXPORT_SYMBOL(neigh_connected_output);
+EXPORT_SYMBOL(neigh_create);
+EXPORT_SYMBOL(neigh_delete);
+EXPORT_SYMBOL(neigh_destroy);
+EXPORT_SYMBOL(neigh_dump_info);
+EXPORT_SYMBOL(neigh_event_ns);
+EXPORT_SYMBOL(neigh_ifdown);
+EXPORT_SYMBOL(neigh_lookup);
+EXPORT_SYMBOL(neigh_lookup_nodev);
+EXPORT_SYMBOL(neigh_parms_alloc);
+EXPORT_SYMBOL(neigh_parms_release);
+EXPORT_SYMBOL(neigh_rand_reach_time);
+EXPORT_SYMBOL(neigh_resolve_output);
+EXPORT_SYMBOL(neigh_table_clear);
+EXPORT_SYMBOL(neigh_table_init);
+EXPORT_SYMBOL(neigh_update);
+EXPORT_SYMBOL(neigh_update_hhs);
+EXPORT_SYMBOL(pneigh_enqueue);
+EXPORT_SYMBOL(pneigh_lookup);
+
+#ifdef CONFIG_ARPD
+EXPORT_SYMBOL(neigh_app_ns);
+#endif
+#ifdef CONFIG_SYSCTL
+EXPORT_SYMBOL(neigh_sysctl_register);
+EXPORT_SYMBOL(neigh_sysctl_unregister);
+#endif
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
new file mode 100644
index 0000000..060f703
--- /dev/null
+++ b/net/core/net-sysfs.c
@@ -0,0 +1,461 @@
+/*
+ * net-sysfs.c - network device class and attributes
+ *
+ * Copyright (c) 2003 Stephen Hemminger <shemminger@osdl.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <net/sock.h>
+#include <linux/rtnetlink.h>
+#include <linux/wireless.h>
+
+#define to_class_dev(obj) container_of(obj,struct class_device,kobj)
+#define to_net_dev(class) container_of(class, struct net_device, class_dev)
+
+static const char fmt_hex[] = "%#x\n";
+static const char fmt_dec[] = "%d\n";
+static const char fmt_ulong[] = "%lu\n";
+
+static inline int dev_isalive(const struct net_device *dev)
+{
+ return dev->reg_state == NETREG_REGISTERED;
+}
+
+/* use same locking rules as GIF* ioctl's */
+static ssize_t netdev_show(const struct class_device *cd, char *buf,
+ ssize_t (*format)(const struct net_device *, char *))
+{
+ struct net_device *net = to_net_dev(cd);
+ ssize_t ret = -EINVAL;
+
+ read_lock(&dev_base_lock);
+ if (dev_isalive(net))
+ ret = (*format)(net, buf);
+ read_unlock(&dev_base_lock);
+
+ return ret;
+}
+
+/* generate a show function for simple field */
+#define NETDEVICE_SHOW(field, format_string) \
+static ssize_t format_##field(const struct net_device *net, char *buf) \
+{ \
+ return sprintf(buf, format_string, net->field); \
+} \
+static ssize_t show_##field(struct class_device *cd, char *buf) \
+{ \
+ return netdev_show(cd, buf, format_##field); \
+}
+
+
+/* use same locking and permission rules as SIF* ioctl's */
+static ssize_t netdev_store(struct class_device *dev,
+ const char *buf, size_t len,
+ int (*set)(struct net_device *, unsigned long))
+{
+ struct net_device *net = to_net_dev(dev);
+ char *endp;
+ unsigned long new;
+ int ret = -EINVAL;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ new = simple_strtoul(buf, &endp, 0);
+ if (endp == buf)
+ goto err;
+
+ rtnl_lock();
+ if (dev_isalive(net)) {
+ if ((ret = (*set)(net, new)) == 0)
+ ret = len;
+ }
+ rtnl_unlock();
+ err:
+ return ret;
+}
+
+/* generate a read-only network device class attribute */
+#define NETDEVICE_ATTR(field, format_string) \
+NETDEVICE_SHOW(field, format_string) \
+static CLASS_DEVICE_ATTR(field, S_IRUGO, show_##field, NULL) \
+
+NETDEVICE_ATTR(addr_len, fmt_dec);
+NETDEVICE_ATTR(iflink, fmt_dec);
+NETDEVICE_ATTR(ifindex, fmt_dec);
+NETDEVICE_ATTR(features, fmt_hex);
+NETDEVICE_ATTR(type, fmt_dec);
+
+/* use same locking rules as GIFHWADDR ioctl's */
+static ssize_t format_addr(char *buf, const unsigned char *addr, int len)
+{
+ int i;
+ char *cp = buf;
+
+ for (i = 0; i < len; i++)
+ cp += sprintf(cp, "%02x%c", addr[i],
+ i == (len - 1) ? '\n' : ':');
+ return cp - buf;
+}
+
+static ssize_t show_address(struct class_device *dev, char *buf)
+{
+ struct net_device *net = to_net_dev(dev);
+ ssize_t ret = -EINVAL;
+
+ read_lock(&dev_base_lock);
+ if (dev_isalive(net))
+ ret = format_addr(buf, net->dev_addr, net->addr_len);
+ read_unlock(&dev_base_lock);
+ return ret;
+}
+
+static ssize_t show_broadcast(struct class_device *dev, char *buf)
+{
+ struct net_device *net = to_net_dev(dev);
+ if (dev_isalive(net))
+ return format_addr(buf, net->broadcast, net->addr_len);
+ return -EINVAL;
+}
+
+static ssize_t show_carrier(struct class_device *dev, char *buf)
+{
+ struct net_device *netdev = to_net_dev(dev);
+ if (netif_running(netdev)) {
+ return sprintf(buf, fmt_dec, !!netif_carrier_ok(netdev));
+ }
+ return -EINVAL;
+}
+
+static CLASS_DEVICE_ATTR(address, S_IRUGO, show_address, NULL);
+static CLASS_DEVICE_ATTR(broadcast, S_IRUGO, show_broadcast, NULL);
+static CLASS_DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL);
+
+/* read-write attributes */
+NETDEVICE_SHOW(mtu, fmt_dec);
+
+static int change_mtu(struct net_device *net, unsigned long new_mtu)
+{
+ return dev_set_mtu(net, (int) new_mtu);
+}
+
+static ssize_t store_mtu(struct class_device *dev, const char *buf, size_t len)
+{
+ return netdev_store(dev, buf, len, change_mtu);
+}
+
+static CLASS_DEVICE_ATTR(mtu, S_IRUGO | S_IWUSR, show_mtu, store_mtu);
+
+NETDEVICE_SHOW(flags, fmt_hex);
+
+static int change_flags(struct net_device *net, unsigned long new_flags)
+{
+ return dev_change_flags(net, (unsigned) new_flags);
+}
+
+static ssize_t store_flags(struct class_device *dev, const char *buf, size_t len)
+{
+ return netdev_store(dev, buf, len, change_flags);
+}
+
+static CLASS_DEVICE_ATTR(flags, S_IRUGO | S_IWUSR, show_flags, store_flags);
+
+NETDEVICE_SHOW(tx_queue_len, fmt_ulong);
+
+static int change_tx_queue_len(struct net_device *net, unsigned long new_len)
+{
+ net->tx_queue_len = new_len;
+ return 0;
+}
+
+static ssize_t store_tx_queue_len(struct class_device *dev, const char *buf, size_t len)
+{
+ return netdev_store(dev, buf, len, change_tx_queue_len);
+}
+
+static CLASS_DEVICE_ATTR(tx_queue_len, S_IRUGO | S_IWUSR, show_tx_queue_len,
+ store_tx_queue_len);
+
+
+static struct class_device_attribute *net_class_attributes[] = {
+ &class_device_attr_ifindex,
+ &class_device_attr_iflink,
+ &class_device_attr_addr_len,
+ &class_device_attr_tx_queue_len,
+ &class_device_attr_features,
+ &class_device_attr_mtu,
+ &class_device_attr_flags,
+ &class_device_attr_type,
+ &class_device_attr_address,
+ &class_device_attr_broadcast,
+ &class_device_attr_carrier,
+ NULL
+};
+
+/* Show a given an attribute in the statistics group */
+static ssize_t netstat_show(const struct class_device *cd, char *buf,
+ unsigned long offset)
+{
+ struct net_device *dev = to_net_dev(cd);
+ struct net_device_stats *stats;
+ ssize_t ret = -EINVAL;
+
+ if (offset > sizeof(struct net_device_stats) ||
+ offset % sizeof(unsigned long) != 0)
+ WARN_ON(1);
+
+ read_lock(&dev_base_lock);
+ if (dev_isalive(dev) && dev->get_stats &&
+ (stats = (*dev->get_stats)(dev)))
+ ret = sprintf(buf, fmt_ulong,
+ *(unsigned long *)(((u8 *) stats) + offset));
+
+ read_unlock(&dev_base_lock);
+ return ret;
+}
+
+/* generate a read-only statistics attribute */
+#define NETSTAT_ENTRY(name) \
+static ssize_t show_##name(struct class_device *cd, char *buf) \
+{ \
+ return netstat_show(cd, buf, \
+ offsetof(struct net_device_stats, name)); \
+} \
+static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL)
+
+NETSTAT_ENTRY(rx_packets);
+NETSTAT_ENTRY(tx_packets);
+NETSTAT_ENTRY(rx_bytes);
+NETSTAT_ENTRY(tx_bytes);
+NETSTAT_ENTRY(rx_errors);
+NETSTAT_ENTRY(tx_errors);
+NETSTAT_ENTRY(rx_dropped);
+NETSTAT_ENTRY(tx_dropped);
+NETSTAT_ENTRY(multicast);
+NETSTAT_ENTRY(collisions);
+NETSTAT_ENTRY(rx_length_errors);
+NETSTAT_ENTRY(rx_over_errors);
+NETSTAT_ENTRY(rx_crc_errors);
+NETSTAT_ENTRY(rx_frame_errors);
+NETSTAT_ENTRY(rx_fifo_errors);
+NETSTAT_ENTRY(rx_missed_errors);
+NETSTAT_ENTRY(tx_aborted_errors);
+NETSTAT_ENTRY(tx_carrier_errors);
+NETSTAT_ENTRY(tx_fifo_errors);
+NETSTAT_ENTRY(tx_heartbeat_errors);
+NETSTAT_ENTRY(tx_window_errors);
+NETSTAT_ENTRY(rx_compressed);
+NETSTAT_ENTRY(tx_compressed);
+
+static struct attribute *netstat_attrs[] = {
+ &class_device_attr_rx_packets.attr,
+ &class_device_attr_tx_packets.attr,
+ &class_device_attr_rx_bytes.attr,
+ &class_device_attr_tx_bytes.attr,
+ &class_device_attr_rx_errors.attr,
+ &class_device_attr_tx_errors.attr,
+ &class_device_attr_rx_dropped.attr,
+ &class_device_attr_tx_dropped.attr,
+ &class_device_attr_multicast.attr,
+ &class_device_attr_collisions.attr,
+ &class_device_attr_rx_length_errors.attr,
+ &class_device_attr_rx_over_errors.attr,
+ &class_device_attr_rx_crc_errors.attr,
+ &class_device_attr_rx_frame_errors.attr,
+ &class_device_attr_rx_fifo_errors.attr,
+ &class_device_attr_rx_missed_errors.attr,
+ &class_device_attr_tx_aborted_errors.attr,
+ &class_device_attr_tx_carrier_errors.attr,
+ &class_device_attr_tx_fifo_errors.attr,
+ &class_device_attr_tx_heartbeat_errors.attr,
+ &class_device_attr_tx_window_errors.attr,
+ &class_device_attr_rx_compressed.attr,
+ &class_device_attr_tx_compressed.attr,
+ NULL
+};
+
+
+static struct attribute_group netstat_group = {
+ .name = "statistics",
+ .attrs = netstat_attrs,
+};
+
+#ifdef WIRELESS_EXT
+/* helper function that does all the locking etc for wireless stats */
+static ssize_t wireless_show(struct class_device *cd, char *buf,
+ ssize_t (*format)(const struct iw_statistics *,
+ char *))
+{
+ struct net_device *dev = to_net_dev(cd);
+ const struct iw_statistics *iw;
+ ssize_t ret = -EINVAL;
+
+ read_lock(&dev_base_lock);
+ if (dev_isalive(dev) && dev->get_wireless_stats
+ && (iw = dev->get_wireless_stats(dev)) != NULL)
+ ret = (*format)(iw, buf);
+ read_unlock(&dev_base_lock);
+
+ return ret;
+}
+
+/* show function template for wireless fields */
+#define WIRELESS_SHOW(name, field, format_string) \
+static ssize_t format_iw_##name(const struct iw_statistics *iw, char *buf) \
+{ \
+ return sprintf(buf, format_string, iw->field); \
+} \
+static ssize_t show_iw_##name(struct class_device *cd, char *buf) \
+{ \
+ return wireless_show(cd, buf, format_iw_##name); \
+} \
+static CLASS_DEVICE_ATTR(name, S_IRUGO, show_iw_##name, NULL)
+
+WIRELESS_SHOW(status, status, fmt_hex);
+WIRELESS_SHOW(link, qual.qual, fmt_dec);
+WIRELESS_SHOW(level, qual.level, fmt_dec);
+WIRELESS_SHOW(noise, qual.noise, fmt_dec);
+WIRELESS_SHOW(nwid, discard.nwid, fmt_dec);
+WIRELESS_SHOW(crypt, discard.code, fmt_dec);
+WIRELESS_SHOW(fragment, discard.fragment, fmt_dec);
+WIRELESS_SHOW(misc, discard.misc, fmt_dec);
+WIRELESS_SHOW(retries, discard.retries, fmt_dec);
+WIRELESS_SHOW(beacon, miss.beacon, fmt_dec);
+
+static struct attribute *wireless_attrs[] = {
+ &class_device_attr_status.attr,
+ &class_device_attr_link.attr,
+ &class_device_attr_level.attr,
+ &class_device_attr_noise.attr,
+ &class_device_attr_nwid.attr,
+ &class_device_attr_crypt.attr,
+ &class_device_attr_fragment.attr,
+ &class_device_attr_retries.attr,
+ &class_device_attr_misc.attr,
+ &class_device_attr_beacon.attr,
+ NULL
+};
+
+static struct attribute_group wireless_group = {
+ .name = "wireless",
+ .attrs = wireless_attrs,
+};
+#endif
+
+#ifdef CONFIG_HOTPLUG
+static int netdev_hotplug(struct class_device *cd, char **envp,
+ int num_envp, char *buf, int size)
+{
+ struct net_device *dev = to_net_dev(cd);
+ int i = 0;
+ int n;
+
+ /* pass interface in env to hotplug. */
+ envp[i++] = buf;
+ n = snprintf(buf, size, "INTERFACE=%s", dev->name) + 1;
+ buf += n;
+ size -= n;
+
+ if ((size <= 0) || (i >= num_envp))
+ return -ENOMEM;
+
+ envp[i] = NULL;
+ return 0;
+}
+#endif
+
+/*
+ * netdev_release -- destroy and free a dead device.
+ * Called when last reference to class_device kobject is gone.
+ */
+static void netdev_release(struct class_device *cd)
+{
+ struct net_device *dev
+ = container_of(cd, struct net_device, class_dev);
+
+ BUG_ON(dev->reg_state != NETREG_RELEASED);
+
+ kfree((char *)dev - dev->padded);
+}
+
+static struct class net_class = {
+ .name = "net",
+ .release = netdev_release,
+#ifdef CONFIG_HOTPLUG
+ .hotplug = netdev_hotplug,
+#endif
+};
+
+void netdev_unregister_sysfs(struct net_device * net)
+{
+ struct class_device * class_dev = &(net->class_dev);
+
+ if (net->get_stats)
+ sysfs_remove_group(&class_dev->kobj, &netstat_group);
+
+#ifdef WIRELESS_EXT
+ if (net->get_wireless_stats)
+ sysfs_remove_group(&class_dev->kobj, &wireless_group);
+#endif
+ class_device_del(class_dev);
+
+}
+
+/* Create sysfs entries for network device. */
+int netdev_register_sysfs(struct net_device *net)
+{
+ struct class_device *class_dev = &(net->class_dev);
+ int i;
+ struct class_device_attribute *attr;
+ int ret;
+
+ class_dev->class = &net_class;
+ class_dev->class_data = net;
+
+ strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
+ if ((ret = class_device_register(class_dev)))
+ goto out;
+
+ for (i = 0; (attr = net_class_attributes[i]) != NULL; i++) {
+ if ((ret = class_device_create_file(class_dev, attr)))
+ goto out_unreg;
+ }
+
+
+ if (net->get_stats &&
+ (ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
+ goto out_unreg;
+
+#ifdef WIRELESS_EXT
+ if (net->get_wireless_stats &&
+ (ret = sysfs_create_group(&class_dev->kobj, &wireless_group)))
+ goto out_cleanup;
+
+ return 0;
+out_cleanup:
+ if (net->get_stats)
+ sysfs_remove_group(&class_dev->kobj, &netstat_group);
+#else
+ return 0;
+#endif
+
+out_unreg:
+ printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n",
+ net->name, ret);
+ class_device_unregister(class_dev);
+out:
+ return ret;
+}
+
+int netdev_sysfs_init(void)
+{
+ return class_register(&net_class);
+}
diff --git a/net/core/netfilter.c b/net/core/netfilter.c
new file mode 100644
index 0000000..e51cfa4
--- /dev/null
+++ b/net/core/netfilter.c
@@ -0,0 +1,799 @@
+/* netfilter.c: look after the filters for various protocols.
+ * Heavily influenced by the old firewall.c by David Bonn and Alan Cox.
+ *
+ * Thanks to Rob `CmdrTaco' Malda for not influencing this code in any
+ * way.
+ *
+ * Rusty Russell (C)2000 -- This code is GPL.
+ *
+ * February 2000: Modified by James Morris to have 1 queue per protocol.
+ * 15-Mar-2000: Added NF_REPEAT --RR.
+ * 08-May-2003: Internal logging interface added by Jozsef Kadlecsik.
+ */
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/netfilter.h>
+#include <net/protocol.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/if.h>
+#include <linux/netdevice.h>
+#include <linux/inetdevice.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/icmp.h>
+#include <net/sock.h>
+#include <net/route.h>
+#include <linux/ip.h>
+
+/* In this code, we can be waiting indefinitely for userspace to
+ * service a packet if a hook returns NF_QUEUE. We could keep a count
+ * of skbuffs queued for userspace, and not deregister a hook unless
+ * this is zero, but that sucks. Now, we simply check when the
+ * packets come back: if the hook is gone, the packet is discarded. */
+#ifdef CONFIG_NETFILTER_DEBUG
+#define NFDEBUG(format, args...) printk(format , ## args)
+#else
+#define NFDEBUG(format, args...)
+#endif
+
+/* Sockopts only registered and called from user context, so
+ net locking would be overkill. Also, [gs]etsockopt calls may
+ sleep. */
+static DECLARE_MUTEX(nf_sockopt_mutex);
+
+struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
+static LIST_HEAD(nf_sockopts);
+static DEFINE_SPINLOCK(nf_hook_lock);
+
+/*
+ * A queue handler may be registered for each protocol. Each is protected by
+ * long term mutex. The handler must provide an an outfn() to accept packets
+ * for queueing and must reinject all packets it receives, no matter what.
+ */
+static struct nf_queue_handler_t {
+ nf_queue_outfn_t outfn;
+ void *data;
+} queue_handler[NPROTO];
+static DEFINE_RWLOCK(queue_handler_lock);
+
+int nf_register_hook(struct nf_hook_ops *reg)
+{
+ struct list_head *i;
+
+ spin_lock_bh(&nf_hook_lock);
+ list_for_each(i, &nf_hooks[reg->pf][reg->hooknum]) {
+ if (reg->priority < ((struct nf_hook_ops *)i)->priority)
+ break;
+ }
+ list_add_rcu(®->list, i->prev);
+ spin_unlock_bh(&nf_hook_lock);
+
+ synchronize_net();
+ return 0;
+}
+
+void nf_unregister_hook(struct nf_hook_ops *reg)
+{
+ spin_lock_bh(&nf_hook_lock);
+ list_del_rcu(®->list);
+ spin_unlock_bh(&nf_hook_lock);
+
+ synchronize_net();
+}
+
+/* Do exclusive ranges overlap? */
+static inline int overlap(int min1, int max1, int min2, int max2)
+{
+ return max1 > min2 && min1 < max2;
+}
+
+/* Functions to register sockopt ranges (exclusive). */
+int nf_register_sockopt(struct nf_sockopt_ops *reg)
+{
+ struct list_head *i;
+ int ret = 0;
+
+ if (down_interruptible(&nf_sockopt_mutex) != 0)
+ return -EINTR;
+
+ list_for_each(i, &nf_sockopts) {
+ struct nf_sockopt_ops *ops = (struct nf_sockopt_ops *)i;
+ if (ops->pf == reg->pf
+ && (overlap(ops->set_optmin, ops->set_optmax,
+ reg->set_optmin, reg->set_optmax)
+ || overlap(ops->get_optmin, ops->get_optmax,
+ reg->get_optmin, reg->get_optmax))) {
+ NFDEBUG("nf_sock overlap: %u-%u/%u-%u v %u-%u/%u-%u\n",
+ ops->set_optmin, ops->set_optmax,
+ ops->get_optmin, ops->get_optmax,
+ reg->set_optmin, reg->set_optmax,
+ reg->get_optmin, reg->get_optmax);
+ ret = -EBUSY;
+ goto out;
+ }
+ }
+
+ list_add(®->list, &nf_sockopts);
+out:
+ up(&nf_sockopt_mutex);
+ return ret;
+}
+
+void nf_unregister_sockopt(struct nf_sockopt_ops *reg)
+{
+ /* No point being interruptible: we're probably in cleanup_module() */
+ restart:
+ down(&nf_sockopt_mutex);
+ if (reg->use != 0) {
+ /* To be woken by nf_sockopt call... */
+ /* FIXME: Stuart Young's name appears gratuitously. */
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ reg->cleanup_task = current;
+ up(&nf_sockopt_mutex);
+ schedule();
+ goto restart;
+ }
+ list_del(®->list);
+ up(&nf_sockopt_mutex);
+}
+
+#ifdef CONFIG_NETFILTER_DEBUG
+#include <net/ip.h>
+#include <net/tcp.h>
+#include <linux/netfilter_ipv4.h>
+
+static void debug_print_hooks_ip(unsigned int nf_debug)
+{
+ if (nf_debug & (1 << NF_IP_PRE_ROUTING)) {
+ printk("PRE_ROUTING ");
+ nf_debug ^= (1 << NF_IP_PRE_ROUTING);
+ }
+ if (nf_debug & (1 << NF_IP_LOCAL_IN)) {
+ printk("LOCAL_IN ");
+ nf_debug ^= (1 << NF_IP_LOCAL_IN);
+ }
+ if (nf_debug & (1 << NF_IP_FORWARD)) {
+ printk("FORWARD ");
+ nf_debug ^= (1 << NF_IP_FORWARD);
+ }
+ if (nf_debug & (1 << NF_IP_LOCAL_OUT)) {
+ printk("LOCAL_OUT ");
+ nf_debug ^= (1 << NF_IP_LOCAL_OUT);
+ }
+ if (nf_debug & (1 << NF_IP_POST_ROUTING)) {
+ printk("POST_ROUTING ");
+ nf_debug ^= (1 << NF_IP_POST_ROUTING);
+ }
+ if (nf_debug)
+ printk("Crap bits: 0x%04X", nf_debug);
+ printk("\n");
+}
+
+static void nf_dump_skb(int pf, struct sk_buff *skb)
+{
+ printk("skb: pf=%i %s dev=%s len=%u\n",
+ pf,
+ skb->sk ? "(owned)" : "(unowned)",
+ skb->dev ? skb->dev->name : "(no dev)",
+ skb->len);
+ switch (pf) {
+ case PF_INET: {
+ const struct iphdr *ip = skb->nh.iph;
+ __u32 *opt = (__u32 *) (ip + 1);
+ int opti;
+ __u16 src_port = 0, dst_port = 0;
+
+ if (ip->protocol == IPPROTO_TCP
+ || ip->protocol == IPPROTO_UDP) {
+ struct tcphdr *tcp=(struct tcphdr *)((__u32 *)ip+ip->ihl);
+ src_port = ntohs(tcp->source);
+ dst_port = ntohs(tcp->dest);
+ }
+
+ printk("PROTO=%d %u.%u.%u.%u:%hu %u.%u.%u.%u:%hu"
+ " L=%hu S=0x%2.2hX I=%hu F=0x%4.4hX T=%hu",
+ ip->protocol, NIPQUAD(ip->saddr),
+ src_port, NIPQUAD(ip->daddr),
+ dst_port,
+ ntohs(ip->tot_len), ip->tos, ntohs(ip->id),
+ ntohs(ip->frag_off), ip->ttl);
+
+ for (opti = 0; opti < (ip->ihl - sizeof(struct iphdr) / 4); opti++)
+ printk(" O=0x%8.8X", *opt++);
+ printk("\n");
+ }
+ }
+}
+
+void nf_debug_ip_local_deliver(struct sk_buff *skb)
+{
+ /* If it's a loopback packet, it must have come through
+ * NF_IP_LOCAL_OUT, NF_IP_RAW_INPUT, NF_IP_PRE_ROUTING and
+ * NF_IP_LOCAL_IN. Otherwise, must have gone through
+ * NF_IP_RAW_INPUT and NF_IP_PRE_ROUTING. */
+ if (!skb->dev) {
+ printk("ip_local_deliver: skb->dev is NULL.\n");
+ }
+ else if (strcmp(skb->dev->name, "lo") == 0) {
+ if (skb->nf_debug != ((1 << NF_IP_LOCAL_OUT)
+ | (1 << NF_IP_POST_ROUTING)
+ | (1 << NF_IP_PRE_ROUTING)
+ | (1 << NF_IP_LOCAL_IN))) {
+ printk("ip_local_deliver: bad loopback skb: ");
+ debug_print_hooks_ip(skb->nf_debug);
+ nf_dump_skb(PF_INET, skb);
+ }
+ }
+ else {
+ if (skb->nf_debug != ((1<<NF_IP_PRE_ROUTING)
+ | (1<<NF_IP_LOCAL_IN))) {
+ printk("ip_local_deliver: bad non-lo skb: ");
+ debug_print_hooks_ip(skb->nf_debug);
+ nf_dump_skb(PF_INET, skb);
+ }
+ }
+}
+
+void nf_debug_ip_loopback_xmit(struct sk_buff *newskb)
+{
+ if (newskb->nf_debug != ((1 << NF_IP_LOCAL_OUT)
+ | (1 << NF_IP_POST_ROUTING))) {
+ printk("ip_dev_loopback_xmit: bad owned skb = %p: ",
+ newskb);
+ debug_print_hooks_ip(newskb->nf_debug);
+ nf_dump_skb(PF_INET, newskb);
+ }
+ /* Clear to avoid confusing input check */
+ newskb->nf_debug = 0;
+}
+
+void nf_debug_ip_finish_output2(struct sk_buff *skb)
+{
+ /* If it's owned, it must have gone through the
+ * NF_IP_LOCAL_OUT and NF_IP_POST_ROUTING.
+ * Otherwise, must have gone through
+ * NF_IP_PRE_ROUTING, NF_IP_FORWARD and NF_IP_POST_ROUTING.
+ */
+ if (skb->sk) {
+ if (skb->nf_debug != ((1 << NF_IP_LOCAL_OUT)
+ | (1 << NF_IP_POST_ROUTING))) {
+ printk("ip_finish_output: bad owned skb = %p: ", skb);
+ debug_print_hooks_ip(skb->nf_debug);
+ nf_dump_skb(PF_INET, skb);
+ }
+ } else {
+ if (skb->nf_debug != ((1 << NF_IP_PRE_ROUTING)
+ | (1 << NF_IP_FORWARD)
+ | (1 << NF_IP_POST_ROUTING))) {
+ /* Fragments, entunnelled packets, TCP RSTs
+ generated by ipt_REJECT will have no
+ owners, but still may be local */
+ if (skb->nf_debug != ((1 << NF_IP_LOCAL_OUT)
+ | (1 << NF_IP_POST_ROUTING))){
+ printk("ip_finish_output:"
+ " bad unowned skb = %p: ",skb);
+ debug_print_hooks_ip(skb->nf_debug);
+ nf_dump_skb(PF_INET, skb);
+ }
+ }
+ }
+}
+#endif /*CONFIG_NETFILTER_DEBUG*/
+
+/* Call get/setsockopt() */
+static int nf_sockopt(struct sock *sk, int pf, int val,
+ char __user *opt, int *len, int get)
+{
+ struct list_head *i;
+ struct nf_sockopt_ops *ops;
+ int ret;
+
+ if (down_interruptible(&nf_sockopt_mutex) != 0)
+ return -EINTR;
+
+ list_for_each(i, &nf_sockopts) {
+ ops = (struct nf_sockopt_ops *)i;
+ if (ops->pf == pf) {
+ if (get) {
+ if (val >= ops->get_optmin
+ && val < ops->get_optmax) {
+ ops->use++;
+ up(&nf_sockopt_mutex);
+ ret = ops->get(sk, val, opt, len);
+ goto out;
+ }
+ } else {
+ if (val >= ops->set_optmin
+ && val < ops->set_optmax) {
+ ops->use++;
+ up(&nf_sockopt_mutex);
+ ret = ops->set(sk, val, opt, *len);
+ goto out;
+ }
+ }
+ }
+ }
+ up(&nf_sockopt_mutex);
+ return -ENOPROTOOPT;
+
+ out:
+ down(&nf_sockopt_mutex);
+ ops->use--;
+ if (ops->cleanup_task)
+ wake_up_process(ops->cleanup_task);
+ up(&nf_sockopt_mutex);
+ return ret;
+}
+
+int nf_setsockopt(struct sock *sk, int pf, int val, char __user *opt,
+ int len)
+{
+ return nf_sockopt(sk, pf, val, opt, &len, 0);
+}
+
+int nf_getsockopt(struct sock *sk, int pf, int val, char __user *opt, int *len)
+{
+ return nf_sockopt(sk, pf, val, opt, len, 1);
+}
+
+static unsigned int nf_iterate(struct list_head *head,
+ struct sk_buff **skb,
+ int hook,
+ const struct net_device *indev,
+ const struct net_device *outdev,
+ struct list_head **i,
+ int (*okfn)(struct sk_buff *),
+ int hook_thresh)
+{
+ unsigned int verdict;
+
+ /*
+ * The caller must not block between calls to this
+ * function because of risk of continuing from deleted element.
+ */
+ list_for_each_continue_rcu(*i, head) {
+ struct nf_hook_ops *elem = (struct nf_hook_ops *)*i;
+
+ if (hook_thresh > elem->priority)
+ continue;
+
+ /* Optimization: we don't need to hold module
+ reference here, since function can't sleep. --RR */
+ verdict = elem->hook(hook, skb, indev, outdev, okfn);
+ if (verdict != NF_ACCEPT) {
+#ifdef CONFIG_NETFILTER_DEBUG
+ if (unlikely(verdict > NF_MAX_VERDICT)) {
+ NFDEBUG("Evil return from %p(%u).\n",
+ elem->hook, hook);
+ continue;
+ }
+#endif
+ if (verdict != NF_REPEAT)
+ return verdict;
+ *i = (*i)->prev;
+ }
+ }
+ return NF_ACCEPT;
+}
+
+int nf_register_queue_handler(int pf, nf_queue_outfn_t outfn, void *data)
+{
+ int ret;
+
+ write_lock_bh(&queue_handler_lock);
+ if (queue_handler[pf].outfn)
+ ret = -EBUSY;
+ else {
+ queue_handler[pf].outfn = outfn;
+ queue_handler[pf].data = data;
+ ret = 0;
+ }
+ write_unlock_bh(&queue_handler_lock);
+
+ return ret;
+}
+
+/* The caller must flush their queue before this */
+int nf_unregister_queue_handler(int pf)
+{
+ write_lock_bh(&queue_handler_lock);
+ queue_handler[pf].outfn = NULL;
+ queue_handler[pf].data = NULL;
+ write_unlock_bh(&queue_handler_lock);
+
+ return 0;
+}
+
+/*
+ * Any packet that leaves via this function must come back
+ * through nf_reinject().
+ */
+static int nf_queue(struct sk_buff *skb,
+ struct list_head *elem,
+ int pf, unsigned int hook,
+ struct net_device *indev,
+ struct net_device *outdev,
+ int (*okfn)(struct sk_buff *))
+{
+ int status;
+ struct nf_info *info;
+#ifdef CONFIG_BRIDGE_NETFILTER
+ struct net_device *physindev = NULL;
+ struct net_device *physoutdev = NULL;
+#endif
+
+ /* QUEUE == DROP if noone is waiting, to be safe. */
+ read_lock(&queue_handler_lock);
+ if (!queue_handler[pf].outfn) {
+ read_unlock(&queue_handler_lock);
+ kfree_skb(skb);
+ return 1;
+ }
+
+ info = kmalloc(sizeof(*info), GFP_ATOMIC);
+ if (!info) {
+ if (net_ratelimit())
+ printk(KERN_ERR "OOM queueing packet %p\n",
+ skb);
+ read_unlock(&queue_handler_lock);
+ kfree_skb(skb);
+ return 1;
+ }
+
+ *info = (struct nf_info) {
+ (struct nf_hook_ops *)elem, pf, hook, indev, outdev, okfn };
+
+ /* If it's going away, ignore hook. */
+ if (!try_module_get(info->elem->owner)) {
+ read_unlock(&queue_handler_lock);
+ kfree(info);
+ return 0;
+ }
+
+ /* Bump dev refs so they don't vanish while packet is out */
+ if (indev) dev_hold(indev);
+ if (outdev) dev_hold(outdev);
+
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (skb->nf_bridge) {
+ physindev = skb->nf_bridge->physindev;
+ if (physindev) dev_hold(physindev);
+ physoutdev = skb->nf_bridge->physoutdev;
+ if (physoutdev) dev_hold(physoutdev);
+ }
+#endif
+
+ status = queue_handler[pf].outfn(skb, info, queue_handler[pf].data);
+ read_unlock(&queue_handler_lock);
+
+ if (status < 0) {
+ /* James M doesn't say fuck enough. */
+ if (indev) dev_put(indev);
+ if (outdev) dev_put(outdev);
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (physindev) dev_put(physindev);
+ if (physoutdev) dev_put(physoutdev);
+#endif
+ module_put(info->elem->owner);
+ kfree(info);
+ kfree_skb(skb);
+ return 1;
+ }
+ return 1;
+}
+
+/* Returns 1 if okfn() needs to be executed by the caller,
+ * -EPERM for NF_DROP, 0 otherwise. */
+int nf_hook_slow(int pf, unsigned int hook, struct sk_buff **pskb,
+ struct net_device *indev,
+ struct net_device *outdev,
+ int (*okfn)(struct sk_buff *),
+ int hook_thresh)
+{
+ struct list_head *elem;
+ unsigned int verdict;
+ int ret = 0;
+
+ /* We may already have this, but read-locks nest anyway */
+ rcu_read_lock();
+
+#ifdef CONFIG_NETFILTER_DEBUG
+ if (unlikely((*pskb)->nf_debug & (1 << hook))) {
+ printk("nf_hook: hook %i already set.\n", hook);
+ nf_dump_skb(pf, *pskb);
+ }
+ (*pskb)->nf_debug |= (1 << hook);
+#endif
+
+ elem = &nf_hooks[pf][hook];
+next_hook:
+ verdict = nf_iterate(&nf_hooks[pf][hook], pskb, hook, indev,
+ outdev, &elem, okfn, hook_thresh);
+ if (verdict == NF_ACCEPT || verdict == NF_STOP) {
+ ret = 1;
+ goto unlock;
+ } else if (verdict == NF_DROP) {
+ kfree_skb(*pskb);
+ ret = -EPERM;
+ } else if (verdict == NF_QUEUE) {
+ NFDEBUG("nf_hook: Verdict = QUEUE.\n");
+ if (!nf_queue(*pskb, elem, pf, hook, indev, outdev, okfn))
+ goto next_hook;
+ }
+unlock:
+ rcu_read_unlock();
+ return ret;
+}
+
+void nf_reinject(struct sk_buff *skb, struct nf_info *info,
+ unsigned int verdict)
+{
+ struct list_head *elem = &info->elem->list;
+ struct list_head *i;
+
+ rcu_read_lock();
+
+ /* Release those devices we held, or Alexey will kill me. */
+ if (info->indev) dev_put(info->indev);
+ if (info->outdev) dev_put(info->outdev);
+#ifdef CONFIG_BRIDGE_NETFILTER
+ if (skb->nf_bridge) {
+ if (skb->nf_bridge->physindev)
+ dev_put(skb->nf_bridge->physindev);
+ if (skb->nf_bridge->physoutdev)
+ dev_put(skb->nf_bridge->physoutdev);
+ }
+#endif
+
+ /* Drop reference to owner of hook which queued us. */
+ module_put(info->elem->owner);
+
+ list_for_each_rcu(i, &nf_hooks[info->pf][info->hook]) {
+ if (i == elem)
+ break;
+ }
+
+ if (elem == &nf_hooks[info->pf][info->hook]) {
+ /* The module which sent it to userspace is gone. */
+ NFDEBUG("%s: module disappeared, dropping packet.\n",
+ __FUNCTION__);
+ verdict = NF_DROP;
+ }
+
+ /* Continue traversal iff userspace said ok... */
+ if (verdict == NF_REPEAT) {
+ elem = elem->prev;
+ verdict = NF_ACCEPT;
+ }
+
+ if (verdict == NF_ACCEPT) {
+ next_hook:
+ verdict = nf_iterate(&nf_hooks[info->pf][info->hook],
+ &skb, info->hook,
+ info->indev, info->outdev, &elem,
+ info->okfn, INT_MIN);
+ }
+
+ switch (verdict) {
+ case NF_ACCEPT:
+ info->okfn(skb);
+ break;
+
+ case NF_QUEUE:
+ if (!nf_queue(skb, elem, info->pf, info->hook,
+ info->indev, info->outdev, info->okfn))
+ goto next_hook;
+ break;
+ }
+ rcu_read_unlock();
+
+ if (verdict == NF_DROP)
+ kfree_skb(skb);
+
+ kfree(info);
+ return;
+}
+
+#ifdef CONFIG_INET
+/* route_me_harder function, used by iptable_nat, iptable_mangle + ip_queue */
+int ip_route_me_harder(struct sk_buff **pskb)
+{
+ struct iphdr *iph = (*pskb)->nh.iph;
+ struct rtable *rt;
+ struct flowi fl = {};
+ struct dst_entry *odst;
+ unsigned int hh_len;
+
+ /* some non-standard hacks like ipt_REJECT.c:send_reset() can cause
+ * packets with foreign saddr to appear on the NF_IP_LOCAL_OUT hook.
+ */
+ if (inet_addr_type(iph->saddr) == RTN_LOCAL) {
+ fl.nl_u.ip4_u.daddr = iph->daddr;
+ fl.nl_u.ip4_u.saddr = iph->saddr;
+ fl.nl_u.ip4_u.tos = RT_TOS(iph->tos);
+ fl.oif = (*pskb)->sk ? (*pskb)->sk->sk_bound_dev_if : 0;
+#ifdef CONFIG_IP_ROUTE_FWMARK
+ fl.nl_u.ip4_u.fwmark = (*pskb)->nfmark;
+#endif
+ fl.proto = iph->protocol;
+ if (ip_route_output_key(&rt, &fl) != 0)
+ return -1;
+
+ /* Drop old route. */
+ dst_release((*pskb)->dst);
+ (*pskb)->dst = &rt->u.dst;
+ } else {
+ /* non-local src, find valid iif to satisfy
+ * rp-filter when calling ip_route_input. */
+ fl.nl_u.ip4_u.daddr = iph->saddr;
+ if (ip_route_output_key(&rt, &fl) != 0)
+ return -1;
+
+ odst = (*pskb)->dst;
+ if (ip_route_input(*pskb, iph->daddr, iph->saddr,
+ RT_TOS(iph->tos), rt->u.dst.dev) != 0) {
+ dst_release(&rt->u.dst);
+ return -1;
+ }
+ dst_release(&rt->u.dst);
+ dst_release(odst);
+ }
+
+ if ((*pskb)->dst->error)
+ return -1;
+
+ /* Change in oif may mean change in hh_len. */
+ hh_len = (*pskb)->dst->dev->hard_header_len;
+ if (skb_headroom(*pskb) < hh_len) {
+ struct sk_buff *nskb;
+
+ nskb = skb_realloc_headroom(*pskb, hh_len);
+ if (!nskb)
+ return -1;
+ if ((*pskb)->sk)
+ skb_set_owner_w(nskb, (*pskb)->sk);
+ kfree_skb(*pskb);
+ *pskb = nskb;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(ip_route_me_harder);
+
+int skb_ip_make_writable(struct sk_buff **pskb, unsigned int writable_len)
+{
+ struct sk_buff *nskb;
+
+ if (writable_len > (*pskb)->len)
+ return 0;
+
+ /* Not exclusive use of packet? Must copy. */
+ if (skb_shared(*pskb) || skb_cloned(*pskb))
+ goto copy_skb;
+
+ return pskb_may_pull(*pskb, writable_len);
+
+copy_skb:
+ nskb = skb_copy(*pskb, GFP_ATOMIC);
+ if (!nskb)
+ return 0;
+ BUG_ON(skb_is_nonlinear(nskb));
+
+ /* Rest of kernel will get very unhappy if we pass it a
+ suddenly-orphaned skbuff */
+ if ((*pskb)->sk)
+ skb_set_owner_w(nskb, (*pskb)->sk);
+ kfree_skb(*pskb);
+ *pskb = nskb;
+ return 1;
+}
+EXPORT_SYMBOL(skb_ip_make_writable);
+#endif /*CONFIG_INET*/
+
+/* Internal logging interface, which relies on the real
+ LOG target modules */
+
+#define NF_LOG_PREFIXLEN 128
+
+static nf_logfn *nf_logging[NPROTO]; /* = NULL */
+static int reported = 0;
+static DEFINE_SPINLOCK(nf_log_lock);
+
+int nf_log_register(int pf, nf_logfn *logfn)
+{
+ int ret = -EBUSY;
+
+ /* Any setup of logging members must be done before
+ * substituting pointer. */
+ spin_lock(&nf_log_lock);
+ if (!nf_logging[pf]) {
+ rcu_assign_pointer(nf_logging[pf], logfn);
+ ret = 0;
+ }
+ spin_unlock(&nf_log_lock);
+ return ret;
+}
+
+void nf_log_unregister(int pf, nf_logfn *logfn)
+{
+ spin_lock(&nf_log_lock);
+ if (nf_logging[pf] == logfn)
+ nf_logging[pf] = NULL;
+ spin_unlock(&nf_log_lock);
+
+ /* Give time to concurrent readers. */
+ synchronize_net();
+}
+
+void nf_log_packet(int pf,
+ unsigned int hooknum,
+ const struct sk_buff *skb,
+ const struct net_device *in,
+ const struct net_device *out,
+ const char *fmt, ...)
+{
+ va_list args;
+ char prefix[NF_LOG_PREFIXLEN];
+ nf_logfn *logfn;
+
+ rcu_read_lock();
+ logfn = rcu_dereference(nf_logging[pf]);
+ if (logfn) {
+ va_start(args, fmt);
+ vsnprintf(prefix, sizeof(prefix), fmt, args);
+ va_end(args);
+ /* We must read logging before nf_logfn[pf] */
+ logfn(hooknum, skb, in, out, prefix);
+ } else if (!reported) {
+ printk(KERN_WARNING "nf_log_packet: can\'t log yet, "
+ "no backend logging module loaded in!\n");
+ reported++;
+ }
+ rcu_read_unlock();
+}
+EXPORT_SYMBOL(nf_log_register);
+EXPORT_SYMBOL(nf_log_unregister);
+EXPORT_SYMBOL(nf_log_packet);
+
+/* This does not belong here, but locally generated errors need it if connection
+ tracking in use: without this, connection may not be in hash table, and hence
+ manufactured ICMP or RST packets will not be associated with it. */
+void (*ip_ct_attach)(struct sk_buff *, struct sk_buff *);
+
+void nf_ct_attach(struct sk_buff *new, struct sk_buff *skb)
+{
+ void (*attach)(struct sk_buff *, struct sk_buff *);
+
+ if (skb->nfct && (attach = ip_ct_attach) != NULL) {
+ mb(); /* Just to be sure: must be read before executing this */
+ attach(new, skb);
+ }
+}
+
+void __init netfilter_init(void)
+{
+ int i, h;
+
+ for (i = 0; i < NPROTO; i++) {
+ for (h = 0; h < NF_MAX_HOOKS; h++)
+ INIT_LIST_HEAD(&nf_hooks[i][h]);
+ }
+}
+
+EXPORT_SYMBOL(ip_ct_attach);
+EXPORT_SYMBOL(nf_ct_attach);
+EXPORT_SYMBOL(nf_getsockopt);
+EXPORT_SYMBOL(nf_hook_slow);
+EXPORT_SYMBOL(nf_hooks);
+EXPORT_SYMBOL(nf_register_hook);
+EXPORT_SYMBOL(nf_register_queue_handler);
+EXPORT_SYMBOL(nf_register_sockopt);
+EXPORT_SYMBOL(nf_reinject);
+EXPORT_SYMBOL(nf_setsockopt);
+EXPORT_SYMBOL(nf_unregister_hook);
+EXPORT_SYMBOL(nf_unregister_queue_handler);
+EXPORT_SYMBOL(nf_unregister_sockopt);
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
new file mode 100644
index 0000000..a119696
--- /dev/null
+++ b/net/core/netpoll.c
@@ -0,0 +1,735 @@
+/*
+ * Common framework for low-level network console, dump, and debugger code
+ *
+ * Sep 8 2003 Matt Mackall <mpm@selenic.com>
+ *
+ * based on the netconsole code from:
+ *
+ * Copyright (C) 2001 Ingo Molnar <mingo@redhat.com>
+ * Copyright (C) 2002 Red Hat, Inc.
+ */
+
+#include <linux/smp_lock.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/string.h>
+#include <linux/inetdevice.h>
+#include <linux/inet.h>
+#include <linux/interrupt.h>
+#include <linux/netpoll.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/rcupdate.h>
+#include <linux/workqueue.h>
+#include <net/tcp.h>
+#include <net/udp.h>
+#include <asm/unaligned.h>
+
+/*
+ * We maintain a small pool of fully-sized skbs, to make sure the
+ * message gets out even in extreme OOM situations.
+ */
+
+#define MAX_UDP_CHUNK 1460
+#define MAX_SKBS 32
+#define MAX_QUEUE_DEPTH (MAX_SKBS / 2)
+
+static DEFINE_SPINLOCK(skb_list_lock);
+static int nr_skbs;
+static struct sk_buff *skbs;
+
+static DEFINE_SPINLOCK(queue_lock);
+static int queue_depth;
+static struct sk_buff *queue_head, *queue_tail;
+
+static atomic_t trapped;
+
+#define NETPOLL_RX_ENABLED 1
+#define NETPOLL_RX_DROP 2
+
+#define MAX_SKB_SIZE \
+ (MAX_UDP_CHUNK + sizeof(struct udphdr) + \
+ sizeof(struct iphdr) + sizeof(struct ethhdr))
+
+static void zap_completion_queue(void);
+
+static void queue_process(void *p)
+{
+ unsigned long flags;
+ struct sk_buff *skb;
+
+ while (queue_head) {
+ spin_lock_irqsave(&queue_lock, flags);
+
+ skb = queue_head;
+ queue_head = skb->next;
+ if (skb == queue_tail)
+ queue_head = NULL;
+
+ queue_depth--;
+
+ spin_unlock_irqrestore(&queue_lock, flags);
+
+ dev_queue_xmit(skb);
+ }
+}
+
+static DECLARE_WORK(send_queue, queue_process, NULL);
+
+void netpoll_queue(struct sk_buff *skb)
+{
+ unsigned long flags;
+
+ if (queue_depth == MAX_QUEUE_DEPTH) {
+ __kfree_skb(skb);
+ return;
+ }
+
+ spin_lock_irqsave(&queue_lock, flags);
+ if (!queue_head)
+ queue_head = skb;
+ else
+ queue_tail->next = skb;
+ queue_tail = skb;
+ queue_depth++;
+ spin_unlock_irqrestore(&queue_lock, flags);
+
+ schedule_work(&send_queue);
+}
+
+static int checksum_udp(struct sk_buff *skb, struct udphdr *uh,
+ unsigned short ulen, u32 saddr, u32 daddr)
+{
+ if (uh->check == 0)
+ return 0;
+
+ if (skb->ip_summed == CHECKSUM_HW)
+ return csum_tcpudp_magic(
+ saddr, daddr, ulen, IPPROTO_UDP, skb->csum);
+
+ skb->csum = csum_tcpudp_nofold(saddr, daddr, ulen, IPPROTO_UDP, 0);
+
+ return csum_fold(skb_checksum(skb, 0, skb->len, skb->csum));
+}
+
+/*
+ * Check whether delayed processing was scheduled for our NIC. If so,
+ * we attempt to grab the poll lock and use ->poll() to pump the card.
+ * If this fails, either we've recursed in ->poll() or it's already
+ * running on another CPU.
+ *
+ * Note: we don't mask interrupts with this lock because we're using
+ * trylock here and interrupts are already disabled in the softirq
+ * case. Further, we test the poll_owner to avoid recursion on UP
+ * systems where the lock doesn't exist.
+ *
+ * In cases where there is bi-directional communications, reading only
+ * one message at a time can lead to packets being dropped by the
+ * network adapter, forcing superfluous retries and possibly timeouts.
+ * Thus, we set our budget to greater than 1.
+ */
+static void poll_napi(struct netpoll *np)
+{
+ int budget = 16;
+
+ if (test_bit(__LINK_STATE_RX_SCHED, &np->dev->state) &&
+ np->poll_owner != smp_processor_id() &&
+ spin_trylock(&np->poll_lock)) {
+ np->rx_flags |= NETPOLL_RX_DROP;
+ atomic_inc(&trapped);
+
+ np->dev->poll(np->dev, &budget);
+
+ atomic_dec(&trapped);
+ np->rx_flags &= ~NETPOLL_RX_DROP;
+ spin_unlock(&np->poll_lock);
+ }
+}
+
+void netpoll_poll(struct netpoll *np)
+{
+ if(!np->dev || !netif_running(np->dev) || !np->dev->poll_controller)
+ return;
+
+ /* Process pending work on NIC */
+ np->dev->poll_controller(np->dev);
+ if (np->dev->poll)
+ poll_napi(np);
+
+ zap_completion_queue();
+}
+
+static void refill_skbs(void)
+{
+ struct sk_buff *skb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&skb_list_lock, flags);
+ while (nr_skbs < MAX_SKBS) {
+ skb = alloc_skb(MAX_SKB_SIZE, GFP_ATOMIC);
+ if (!skb)
+ break;
+
+ skb->next = skbs;
+ skbs = skb;
+ nr_skbs++;
+ }
+ spin_unlock_irqrestore(&skb_list_lock, flags);
+}
+
+static void zap_completion_queue(void)
+{
+ unsigned long flags;
+ struct softnet_data *sd = &get_cpu_var(softnet_data);
+
+ if (sd->completion_queue) {
+ struct sk_buff *clist;
+
+ local_irq_save(flags);
+ clist = sd->completion_queue;
+ sd->completion_queue = NULL;
+ local_irq_restore(flags);
+
+ while (clist != NULL) {
+ struct sk_buff *skb = clist;
+ clist = clist->next;
+ if(skb->destructor)
+ dev_kfree_skb_any(skb); /* put this one back */
+ else
+ __kfree_skb(skb);
+ }
+ }
+
+ put_cpu_var(softnet_data);
+}
+
+static struct sk_buff * find_skb(struct netpoll *np, int len, int reserve)
+{
+ int once = 1, count = 0;
+ unsigned long flags;
+ struct sk_buff *skb = NULL;
+
+ zap_completion_queue();
+repeat:
+ if (nr_skbs < MAX_SKBS)
+ refill_skbs();
+
+ skb = alloc_skb(len, GFP_ATOMIC);
+
+ if (!skb) {
+ spin_lock_irqsave(&skb_list_lock, flags);
+ skb = skbs;
+ if (skb) {
+ skbs = skb->next;
+ skb->next = NULL;
+ nr_skbs--;
+ }
+ spin_unlock_irqrestore(&skb_list_lock, flags);
+ }
+
+ if(!skb) {
+ count++;
+ if (once && (count == 1000000)) {
+ printk("out of netpoll skbs!\n");
+ once = 0;
+ }
+ netpoll_poll(np);
+ goto repeat;
+ }
+
+ atomic_set(&skb->users, 1);
+ skb_reserve(skb, reserve);
+ return skb;
+}
+
+static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
+{
+ int status;
+
+repeat:
+ if(!np || !np->dev || !netif_running(np->dev)) {
+ __kfree_skb(skb);
+ return;
+ }
+
+ /* avoid recursion */
+ if(np->poll_owner == smp_processor_id() ||
+ np->dev->xmit_lock_owner == smp_processor_id()) {
+ if (np->drop)
+ np->drop(skb);
+ else
+ __kfree_skb(skb);
+ return;
+ }
+
+ spin_lock(&np->dev->xmit_lock);
+ np->dev->xmit_lock_owner = smp_processor_id();
+
+ /*
+ * network drivers do not expect to be called if the queue is
+ * stopped.
+ */
+ if (netif_queue_stopped(np->dev)) {
+ np->dev->xmit_lock_owner = -1;
+ spin_unlock(&np->dev->xmit_lock);
+
+ netpoll_poll(np);
+ goto repeat;
+ }
+
+ status = np->dev->hard_start_xmit(skb, np->dev);
+ np->dev->xmit_lock_owner = -1;
+ spin_unlock(&np->dev->xmit_lock);
+
+ /* transmit busy */
+ if(status) {
+ netpoll_poll(np);
+ goto repeat;
+ }
+}
+
+void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
+{
+ int total_len, eth_len, ip_len, udp_len;
+ struct sk_buff *skb;
+ struct udphdr *udph;
+ struct iphdr *iph;
+ struct ethhdr *eth;
+
+ udp_len = len + sizeof(*udph);
+ ip_len = eth_len = udp_len + sizeof(*iph);
+ total_len = eth_len + ETH_HLEN + NET_IP_ALIGN;
+
+ skb = find_skb(np, total_len, total_len - len);
+ if (!skb)
+ return;
+
+ memcpy(skb->data, msg, len);
+ skb->len += len;
+
+ udph = (struct udphdr *) skb_push(skb, sizeof(*udph));
+ udph->source = htons(np->local_port);
+ udph->dest = htons(np->remote_port);
+ udph->len = htons(udp_len);
+ udph->check = 0;
+
+ iph = (struct iphdr *)skb_push(skb, sizeof(*iph));
+
+ /* iph->version = 4; iph->ihl = 5; */
+ put_unaligned(0x45, (unsigned char *)iph);
+ iph->tos = 0;
+ put_unaligned(htons(ip_len), &(iph->tot_len));
+ iph->id = 0;
+ iph->frag_off = 0;
+ iph->ttl = 64;
+ iph->protocol = IPPROTO_UDP;
+ iph->check = 0;
+ put_unaligned(htonl(np->local_ip), &(iph->saddr));
+ put_unaligned(htonl(np->remote_ip), &(iph->daddr));
+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+
+ eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
+
+ eth->h_proto = htons(ETH_P_IP);
+ memcpy(eth->h_source, np->local_mac, 6);
+ memcpy(eth->h_dest, np->remote_mac, 6);
+
+ skb->dev = np->dev;
+
+ netpoll_send_skb(np, skb);
+}
+
+static void arp_reply(struct sk_buff *skb)
+{
+ struct arphdr *arp;
+ unsigned char *arp_ptr;
+ int size, type = ARPOP_REPLY, ptype = ETH_P_ARP;
+ u32 sip, tip;
+ struct sk_buff *send_skb;
+ struct netpoll *np = skb->dev->np;
+
+ if (!np) return;
+
+ /* No arp on this interface */
+ if (skb->dev->flags & IFF_NOARP)
+ return;
+
+ if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
+ (2 * skb->dev->addr_len) +
+ (2 * sizeof(u32)))))
+ return;
+
+ skb->h.raw = skb->nh.raw = skb->data;
+ arp = skb->nh.arph;
+
+ if ((arp->ar_hrd != htons(ARPHRD_ETHER) &&
+ arp->ar_hrd != htons(ARPHRD_IEEE802)) ||
+ arp->ar_pro != htons(ETH_P_IP) ||
+ arp->ar_op != htons(ARPOP_REQUEST))
+ return;
+
+ arp_ptr = (unsigned char *)(arp+1) + skb->dev->addr_len;
+ memcpy(&sip, arp_ptr, 4);
+ arp_ptr += 4 + skb->dev->addr_len;
+ memcpy(&tip, arp_ptr, 4);
+
+ /* Should we ignore arp? */
+ if (tip != htonl(np->local_ip) || LOOPBACK(tip) || MULTICAST(tip))
+ return;
+
+ size = sizeof(struct arphdr) + 2 * (skb->dev->addr_len + 4);
+ send_skb = find_skb(np, size + LL_RESERVED_SPACE(np->dev),
+ LL_RESERVED_SPACE(np->dev));
+
+ if (!send_skb)
+ return;
+
+ send_skb->nh.raw = send_skb->data;
+ arp = (struct arphdr *) skb_put(send_skb, size);
+ send_skb->dev = skb->dev;
+ send_skb->protocol = htons(ETH_P_ARP);
+
+ /* Fill the device header for the ARP frame */
+
+ if (np->dev->hard_header &&
+ np->dev->hard_header(send_skb, skb->dev, ptype,
+ np->remote_mac, np->local_mac,
+ send_skb->len) < 0) {
+ kfree_skb(send_skb);
+ return;
+ }
+
+ /*
+ * Fill out the arp protocol part.
+ *
+ * we only support ethernet device type,
+ * which (according to RFC 1390) should always equal 1 (Ethernet).
+ */
+
+ arp->ar_hrd = htons(np->dev->type);
+ arp->ar_pro = htons(ETH_P_IP);
+ arp->ar_hln = np->dev->addr_len;
+ arp->ar_pln = 4;
+ arp->ar_op = htons(type);
+
+ arp_ptr=(unsigned char *)(arp + 1);
+ memcpy(arp_ptr, np->dev->dev_addr, np->dev->addr_len);
+ arp_ptr += np->dev->addr_len;
+ memcpy(arp_ptr, &tip, 4);
+ arp_ptr += 4;
+ memcpy(arp_ptr, np->remote_mac, np->dev->addr_len);
+ arp_ptr += np->dev->addr_len;
+ memcpy(arp_ptr, &sip, 4);
+
+ netpoll_send_skb(np, send_skb);
+}
+
+int __netpoll_rx(struct sk_buff *skb)
+{
+ int proto, len, ulen;
+ struct iphdr *iph;
+ struct udphdr *uh;
+ struct netpoll *np = skb->dev->np;
+
+ if (!np->rx_hook)
+ goto out;
+ if (skb->dev->type != ARPHRD_ETHER)
+ goto out;
+
+ /* check if netpoll clients need ARP */
+ if (skb->protocol == __constant_htons(ETH_P_ARP) &&
+ atomic_read(&trapped)) {
+ arp_reply(skb);
+ return 1;
+ }
+
+ proto = ntohs(eth_hdr(skb)->h_proto);
+ if (proto != ETH_P_IP)
+ goto out;
+ if (skb->pkt_type == PACKET_OTHERHOST)
+ goto out;
+ if (skb_shared(skb))
+ goto out;
+
+ iph = (struct iphdr *)skb->data;
+ if (!pskb_may_pull(skb, sizeof(struct iphdr)))
+ goto out;
+ if (iph->ihl < 5 || iph->version != 4)
+ goto out;
+ if (!pskb_may_pull(skb, iph->ihl*4))
+ goto out;
+ if (ip_fast_csum((u8 *)iph, iph->ihl) != 0)
+ goto out;
+
+ len = ntohs(iph->tot_len);
+ if (skb->len < len || len < iph->ihl*4)
+ goto out;
+
+ if (iph->protocol != IPPROTO_UDP)
+ goto out;
+
+ len -= iph->ihl*4;
+ uh = (struct udphdr *)(((char *)iph) + iph->ihl*4);
+ ulen = ntohs(uh->len);
+
+ if (ulen != len)
+ goto out;
+ if (checksum_udp(skb, uh, ulen, iph->saddr, iph->daddr) < 0)
+ goto out;
+ if (np->local_ip && np->local_ip != ntohl(iph->daddr))
+ goto out;
+ if (np->remote_ip && np->remote_ip != ntohl(iph->saddr))
+ goto out;
+ if (np->local_port && np->local_port != ntohs(uh->dest))
+ goto out;
+
+ np->rx_hook(np, ntohs(uh->source),
+ (char *)(uh+1),
+ ulen - sizeof(struct udphdr));
+
+ kfree_skb(skb);
+ return 1;
+
+out:
+ if (atomic_read(&trapped)) {
+ kfree_skb(skb);
+ return 1;
+ }
+
+ return 0;
+}
+
+int netpoll_parse_options(struct netpoll *np, char *opt)
+{
+ char *cur=opt, *delim;
+
+ if(*cur != '@') {
+ if ((delim = strchr(cur, '@')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->local_port=simple_strtol(cur, NULL, 10);
+ cur=delim;
+ }
+ cur++;
+ printk(KERN_INFO "%s: local port %d\n", np->name, np->local_port);
+
+ if(*cur != '/') {
+ if ((delim = strchr(cur, '/')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->local_ip=ntohl(in_aton(cur));
+ cur=delim;
+
+ printk(KERN_INFO "%s: local IP %d.%d.%d.%d\n",
+ np->name, HIPQUAD(np->local_ip));
+ }
+ cur++;
+
+ if ( *cur != ',') {
+ /* parse out dev name */
+ if ((delim = strchr(cur, ',')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ strlcpy(np->dev_name, cur, sizeof(np->dev_name));
+ cur=delim;
+ }
+ cur++;
+
+ printk(KERN_INFO "%s: interface %s\n", np->name, np->dev_name);
+
+ if ( *cur != '@' ) {
+ /* dst port */
+ if ((delim = strchr(cur, '@')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->remote_port=simple_strtol(cur, NULL, 10);
+ cur=delim;
+ }
+ cur++;
+ printk(KERN_INFO "%s: remote port %d\n", np->name, np->remote_port);
+
+ /* dst ip */
+ if ((delim = strchr(cur, '/')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->remote_ip=ntohl(in_aton(cur));
+ cur=delim+1;
+
+ printk(KERN_INFO "%s: remote IP %d.%d.%d.%d\n",
+ np->name, HIPQUAD(np->remote_ip));
+
+ if( *cur != 0 )
+ {
+ /* MAC address */
+ if ((delim = strchr(cur, ':')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->remote_mac[0]=simple_strtol(cur, NULL, 16);
+ cur=delim+1;
+ if ((delim = strchr(cur, ':')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->remote_mac[1]=simple_strtol(cur, NULL, 16);
+ cur=delim+1;
+ if ((delim = strchr(cur, ':')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->remote_mac[2]=simple_strtol(cur, NULL, 16);
+ cur=delim+1;
+ if ((delim = strchr(cur, ':')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->remote_mac[3]=simple_strtol(cur, NULL, 16);
+ cur=delim+1;
+ if ((delim = strchr(cur, ':')) == NULL)
+ goto parse_failed;
+ *delim=0;
+ np->remote_mac[4]=simple_strtol(cur, NULL, 16);
+ cur=delim+1;
+ np->remote_mac[5]=simple_strtol(cur, NULL, 16);
+ }
+
+ printk(KERN_INFO "%s: remote ethernet address "
+ "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ np->name,
+ np->remote_mac[0],
+ np->remote_mac[1],
+ np->remote_mac[2],
+ np->remote_mac[3],
+ np->remote_mac[4],
+ np->remote_mac[5]);
+
+ return 0;
+
+ parse_failed:
+ printk(KERN_INFO "%s: couldn't parse config at %s!\n",
+ np->name, cur);
+ return -1;
+}
+
+int netpoll_setup(struct netpoll *np)
+{
+ struct net_device *ndev = NULL;
+ struct in_device *in_dev;
+
+ np->poll_lock = SPIN_LOCK_UNLOCKED;
+ np->poll_owner = -1;
+
+ if (np->dev_name)
+ ndev = dev_get_by_name(np->dev_name);
+ if (!ndev) {
+ printk(KERN_ERR "%s: %s doesn't exist, aborting.\n",
+ np->name, np->dev_name);
+ return -1;
+ }
+
+ np->dev = ndev;
+ ndev->np = np;
+
+ if (!ndev->poll_controller) {
+ printk(KERN_ERR "%s: %s doesn't support polling, aborting.\n",
+ np->name, np->dev_name);
+ goto release;
+ }
+
+ if (!netif_running(ndev)) {
+ unsigned long atmost, atleast;
+
+ printk(KERN_INFO "%s: device %s not up yet, forcing it\n",
+ np->name, np->dev_name);
+
+ rtnl_shlock();
+ if (dev_change_flags(ndev, ndev->flags | IFF_UP) < 0) {
+ printk(KERN_ERR "%s: failed to open %s\n",
+ np->name, np->dev_name);
+ rtnl_shunlock();
+ goto release;
+ }
+ rtnl_shunlock();
+
+ atleast = jiffies + HZ/10;
+ atmost = jiffies + 4*HZ;
+ while (!netif_carrier_ok(ndev)) {
+ if (time_after(jiffies, atmost)) {
+ printk(KERN_NOTICE
+ "%s: timeout waiting for carrier\n",
+ np->name);
+ break;
+ }
+ cond_resched();
+ }
+
+ /* If carrier appears to come up instantly, we don't
+ * trust it and pause so that we don't pump all our
+ * queued console messages into the bitbucket.
+ */
+
+ if (time_before(jiffies, atleast)) {
+ printk(KERN_NOTICE "%s: carrier detect appears"
+ " untrustworthy, waiting 4 seconds\n",
+ np->name);
+ msleep(4000);
+ }
+ }
+
+ if (!memcmp(np->local_mac, "\0\0\0\0\0\0", 6) && ndev->dev_addr)
+ memcpy(np->local_mac, ndev->dev_addr, 6);
+
+ if (!np->local_ip) {
+ rcu_read_lock();
+ in_dev = __in_dev_get(ndev);
+
+ if (!in_dev || !in_dev->ifa_list) {
+ rcu_read_unlock();
+ printk(KERN_ERR "%s: no IP address for %s, aborting\n",
+ np->name, np->dev_name);
+ goto release;
+ }
+
+ np->local_ip = ntohl(in_dev->ifa_list->ifa_local);
+ rcu_read_unlock();
+ printk(KERN_INFO "%s: local IP %d.%d.%d.%d\n",
+ np->name, HIPQUAD(np->local_ip));
+ }
+
+ if(np->rx_hook)
+ np->rx_flags = NETPOLL_RX_ENABLED;
+
+ return 0;
+
+ release:
+ ndev->np = NULL;
+ np->dev = NULL;
+ dev_put(ndev);
+ return -1;
+}
+
+void netpoll_cleanup(struct netpoll *np)
+{
+ if (np->dev)
+ np->dev->np = NULL;
+ dev_put(np->dev);
+ np->dev = NULL;
+}
+
+int netpoll_trap(void)
+{
+ return atomic_read(&trapped);
+}
+
+void netpoll_set_trap(int trap)
+{
+ if (trap)
+ atomic_inc(&trapped);
+ else
+ atomic_dec(&trapped);
+}
+
+EXPORT_SYMBOL(netpoll_set_trap);
+EXPORT_SYMBOL(netpoll_trap);
+EXPORT_SYMBOL(netpoll_parse_options);
+EXPORT_SYMBOL(netpoll_setup);
+EXPORT_SYMBOL(netpoll_cleanup);
+EXPORT_SYMBOL(netpoll_send_udp);
+EXPORT_SYMBOL(netpoll_poll);
+EXPORT_SYMBOL(netpoll_queue);
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
new file mode 100644
index 0000000..c57b06b
--- /dev/null
+++ b/net/core/pktgen.c
@@ -0,0 +1,3132 @@
+/*
+ * Authors:
+ * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se>
+ * Uppsala University and
+ * Swedish University of Agricultural Sciences
+ *
+ * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ * Ben Greear <greearb@candelatech.com>
+ * Jens Låås <jens.laas@data.slu.se>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ *
+ * A tool for loading the network with preconfigurated packets.
+ * The tool is implemented as a linux module. Parameters are output
+ * device, delay (to hard_xmit), number of packets, and whether
+ * to use multiple SKBs or just the same one.
+ * pktgen uses the installed interface's output routine.
+ *
+ * Additional hacking by:
+ *
+ * Jens.Laas@data.slu.se
+ * Improved by ANK. 010120.
+ * Improved by ANK even more. 010212.
+ * MAC address typo fixed. 010417 --ro
+ * Integrated. 020301 --DaveM
+ * Added multiskb option 020301 --DaveM
+ * Scaling of results. 020417--sigurdur@linpro.no
+ * Significant re-work of the module:
+ * * Convert to threaded model to more efficiently be able to transmit
+ * and receive on multiple interfaces at once.
+ * * Converted many counters to __u64 to allow longer runs.
+ * * Allow configuration of ranges, like min/max IP address, MACs,
+ * and UDP-ports, for both source and destination, and can
+ * set to use a random distribution or sequentially walk the range.
+ * * Can now change most values after starting.
+ * * Place 12-byte packet in UDP payload with magic number,
+ * sequence number, and timestamp.
+ * * Add receiver code that detects dropped pkts, re-ordered pkts, and
+ * latencies (with micro-second) precision.
+ * * Add IOCTL interface to easily get counters & configuration.
+ * --Ben Greear <greearb@candelatech.com>
+ *
+ * Renamed multiskb to clone_skb and cleaned up sending core for two distinct
+ * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0
+ * as a "fastpath" with a configurable number of clones after alloc's.
+ * clone_skb=0 means all packets are allocated this also means ranges time
+ * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100
+ * clones.
+ *
+ * Also moved to /proc/net/pktgen/
+ * --ro
+ *
+ * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever
+ * mistakes. Also merged in DaveM's patch in the -pre6 patch.
+ * --Ben Greear <greearb@candelatech.com>
+ *
+ * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br)
+ *
+ *
+ * 021124 Finished major redesign and rewrite for new functionality.
+ * See Documentation/networking/pktgen.txt for how to use this.
+ *
+ * The new operation:
+ * For each CPU one thread/process is created at start. This process checks
+ * for running devices in the if_list and sends packets until count is 0 it
+ * also the thread checks the thread->control which is used for inter-process
+ * communication. controlling process "posts" operations to the threads this
+ * way. The if_lock should be possible to remove when add/rem_device is merged
+ * into this too.
+ *
+ * By design there should only be *one* "controlling" process. In practice
+ * multiple write accesses gives unpredictable result. Understood by "write"
+ * to /proc gives result code thats should be read be the "writer".
+ * For pratical use this should be no problem.
+ *
+ * Note when adding devices to a specific CPU there good idea to also assign
+ * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU.
+ * --ro
+ *
+ * Fix refcount off by one if first packet fails, potential null deref,
+ * memleak 030710- KJP
+ *
+ * First "ranges" functionality for ipv6 030726 --ro
+ *
+ * Included flow support. 030802 ANK.
+ *
+ * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org>
+ *
+ * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419
+ * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604
+ *
+ * New xmit() return, do_div and misc clean up by Stephen Hemminger
+ * <shemminger@osdl.org> 040923
+ *
+ * Rany Dunlap fixed u64 printk compiler waring
+ *
+ * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org>
+ * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213
+ *
+ * Corrections from Nikolai Malykh (nmalykh@bilim.com)
+ * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230
+ *
+ * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com>
+ * 050103
+ */
+#include <linux/sys.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/smp_lock.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+#include <linux/unistd.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/inet.h>
+#include <linux/inetdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/if_arp.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/udp.h>
+#include <linux/proc_fs.h>
+#include <linux/wait.h>
+#include <net/checksum.h>
+#include <net/ipv6.h>
+#include <net/addrconf.h>
+#include <asm/byteorder.h>
+#include <linux/rcupdate.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/uaccess.h>
+#include <asm/div64.h> /* do_div */
+#include <asm/timex.h>
+
+
+#define VERSION "pktgen v2.61: Packet Generator for packet performance testing.\n"
+
+/* #define PG_DEBUG(a) a */
+#define PG_DEBUG(a)
+
+/* The buckets are exponential in 'width' */
+#define LAT_BUCKETS_MAX 32
+#define IP_NAME_SZ 32
+
+/* Device flag bits */
+#define F_IPSRC_RND (1<<0) /* IP-Src Random */
+#define F_IPDST_RND (1<<1) /* IP-Dst Random */
+#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */
+#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */
+#define F_MACSRC_RND (1<<4) /* MAC-Src Random */
+#define F_MACDST_RND (1<<5) /* MAC-Dst Random */
+#define F_TXSIZE_RND (1<<6) /* Transmit size is random */
+#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */
+
+/* Thread control flag bits */
+#define T_TERMINATE (1<<0)
+#define T_STOP (1<<1) /* Stop run */
+#define T_RUN (1<<2) /* Start run */
+#define T_REMDEV (1<<3) /* Remove all devs */
+
+/* Locks */
+#define thread_lock() spin_lock(&_thread_lock)
+#define thread_unlock() spin_unlock(&_thread_lock)
+
+/* If lock -- can be removed after some work */
+#define if_lock(t) spin_lock(&(t->if_lock));
+#define if_unlock(t) spin_unlock(&(t->if_lock));
+
+/* Used to help with determining the pkts on receive */
+#define PKTGEN_MAGIC 0xbe9be955
+#define PG_PROC_DIR "pktgen"
+
+#define MAX_CFLOWS 65536
+
+struct flow_state
+{
+ __u32 cur_daddr;
+ int count;
+};
+
+struct pktgen_dev {
+
+ /*
+ * Try to keep frequent/infrequent used vars. separated.
+ */
+
+ char ifname[32];
+ struct proc_dir_entry *proc_ent;
+ char result[512];
+ /* proc file names */
+ char fname[80];
+
+ struct pktgen_thread* pg_thread; /* the owner */
+ struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */
+
+ int running; /* if this changes to false, the test will stop */
+
+ /* If min != max, then we will either do a linear iteration, or
+ * we will do a random selection from within the range.
+ */
+ __u32 flags;
+
+ int min_pkt_size; /* = ETH_ZLEN; */
+ int max_pkt_size; /* = ETH_ZLEN; */
+ int nfrags;
+ __u32 delay_us; /* Default delay */
+ __u32 delay_ns;
+ __u64 count; /* Default No packets to send */
+ __u64 sofar; /* How many pkts we've sent so far */
+ __u64 tx_bytes; /* How many bytes we've transmitted */
+ __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */
+
+ /* runtime counters relating to clone_skb */
+ __u64 next_tx_us; /* timestamp of when to tx next */
+ __u32 next_tx_ns;
+
+ __u64 allocated_skbs;
+ __u32 clone_count;
+ int last_ok; /* Was last skb sent?
+ * Or a failed transmit of some sort? This will keep
+ * sequence numbers in order, for example.
+ */
+ __u64 started_at; /* micro-seconds */
+ __u64 stopped_at; /* micro-seconds */
+ __u64 idle_acc; /* micro-seconds */
+ __u32 seq_num;
+
+ int clone_skb; /* Use multiple SKBs during packet gen. If this number
+ * is greater than 1, then that many coppies of the same
+ * packet will be sent before a new packet is allocated.
+ * For instance, if you want to send 1024 identical packets
+ * before creating a new packet, set clone_skb to 1024.
+ */
+
+ char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
+ char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
+ char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
+ char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */
+
+ struct in6_addr in6_saddr;
+ struct in6_addr in6_daddr;
+ struct in6_addr cur_in6_daddr;
+ struct in6_addr cur_in6_saddr;
+ /* For ranges */
+ struct in6_addr min_in6_daddr;
+ struct in6_addr max_in6_daddr;
+ struct in6_addr min_in6_saddr;
+ struct in6_addr max_in6_saddr;
+
+ /* If we're doing ranges, random or incremental, then this
+ * defines the min/max for those ranges.
+ */
+ __u32 saddr_min; /* inclusive, source IP address */
+ __u32 saddr_max; /* exclusive, source IP address */
+ __u32 daddr_min; /* inclusive, dest IP address */
+ __u32 daddr_max; /* exclusive, dest IP address */
+
+ __u16 udp_src_min; /* inclusive, source UDP port */
+ __u16 udp_src_max; /* exclusive, source UDP port */
+ __u16 udp_dst_min; /* inclusive, dest UDP port */
+ __u16 udp_dst_max; /* exclusive, dest UDP port */
+
+ __u32 src_mac_count; /* How many MACs to iterate through */
+ __u32 dst_mac_count; /* How many MACs to iterate through */
+
+ unsigned char dst_mac[6];
+ unsigned char src_mac[6];
+
+ __u32 cur_dst_mac_offset;
+ __u32 cur_src_mac_offset;
+ __u32 cur_saddr;
+ __u32 cur_daddr;
+ __u16 cur_udp_dst;
+ __u16 cur_udp_src;
+ __u32 cur_pkt_size;
+
+ __u8 hh[14];
+ /* = {
+ 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB,
+
+ We fill in SRC address later
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x08, 0x00
+ };
+ */
+ __u16 pad; /* pad out the hh struct to an even 16 bytes */
+
+ struct sk_buff* skb; /* skb we are to transmit next, mainly used for when we
+ * are transmitting the same one multiple times
+ */
+ struct net_device* odev; /* The out-going device. Note that the device should
+ * have it's pg_info pointer pointing back to this
+ * device. This will be set when the user specifies
+ * the out-going device name (not when the inject is
+ * started as it used to do.)
+ */
+ struct flow_state *flows;
+ unsigned cflows; /* Concurrent flows (config) */
+ unsigned lflow; /* Flow length (config) */
+ unsigned nflows; /* accumulated flows (stats) */
+};
+
+struct pktgen_hdr {
+ __u32 pgh_magic;
+ __u32 seq_num;
+ __u32 tv_sec;
+ __u32 tv_usec;
+};
+
+struct pktgen_thread {
+ spinlock_t if_lock;
+ struct pktgen_dev *if_list; /* All device here */
+ struct pktgen_thread* next;
+ char name[32];
+ char fname[128]; /* name of proc file */
+ struct proc_dir_entry *proc_ent;
+ char result[512];
+ u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */
+
+ /* Field for thread to receive "posted" events terminate, stop ifs etc.*/
+
+ u32 control;
+ int pid;
+ int cpu;
+
+ wait_queue_head_t queue;
+};
+
+#define REMOVE 1
+#define FIND 0
+
+/* This code works around the fact that do_div cannot handle two 64-bit
+ numbers, and regular 64-bit division doesn't work on x86 kernels.
+ --Ben
+*/
+
+#define PG_DIV 0
+
+/* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net>
+ * Function copied/adapted/optimized from:
+ *
+ * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html
+ *
+ * Copyright 1994, University of Cambridge Computer Laboratory
+ * All Rights Reserved.
+ *
+ */
+inline static s64 divremdi3(s64 x, s64 y, int type)
+{
+ u64 a = (x < 0) ? -x : x;
+ u64 b = (y < 0) ? -y : y;
+ u64 res = 0, d = 1;
+
+ if (b > 0) {
+ while (b < a) {
+ b <<= 1;
+ d <<= 1;
+ }
+ }
+
+ do {
+ if ( a >= b ) {
+ a -= b;
+ res += d;
+ }
+ b >>= 1;
+ d >>= 1;
+ }
+ while (d);
+
+ if (PG_DIV == type) {
+ return (((x ^ y) & (1ll<<63)) == 0) ? res : -(s64)res;
+ }
+ else {
+ return ((x & (1ll<<63)) == 0) ? a : -(s64)a;
+ }
+}
+
+/* End of hacks to deal with 64-bit math on x86 */
+
+/** Convert to miliseconds */
+static inline __u64 tv_to_ms(const struct timeval* tv)
+{
+ __u64 ms = tv->tv_usec / 1000;
+ ms += (__u64)tv->tv_sec * (__u64)1000;
+ return ms;
+}
+
+
+/** Convert to micro-seconds */
+static inline __u64 tv_to_us(const struct timeval* tv)
+{
+ __u64 us = tv->tv_usec;
+ us += (__u64)tv->tv_sec * (__u64)1000000;
+ return us;
+}
+
+static inline __u64 pg_div(__u64 n, __u32 base) {
+ __u64 tmp = n;
+ do_div(tmp, base);
+ /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n",
+ n, base, tmp); */
+ return tmp;
+}
+
+static inline __u64 pg_div64(__u64 n, __u64 base)
+{
+ __u64 tmp = n;
+/*
+ * How do we know if the architectrure we are running on
+ * supports division with 64 bit base?
+ *
+ */
+#if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__)
+
+ do_div(tmp, base);
+#else
+ tmp = divremdi3(n, base, PG_DIV);
+#endif
+ return tmp;
+}
+
+static inline u32 pktgen_random(void)
+{
+#if 0
+ __u32 n;
+ get_random_bytes(&n, 4);
+ return n;
+#else
+ return net_random();
+#endif
+}
+
+static inline __u64 getCurMs(void)
+{
+ struct timeval tv;
+ do_gettimeofday(&tv);
+ return tv_to_ms(&tv);
+}
+
+static inline __u64 getCurUs(void)
+{
+ struct timeval tv;
+ do_gettimeofday(&tv);
+ return tv_to_us(&tv);
+}
+
+static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b)
+{
+ return tv_to_us(a) - tv_to_us(b);
+}
+
+
+/* old include end */
+
+static char version[] __initdata = VERSION;
+
+static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, size_t count, loff_t *ppos);
+static ssize_t proc_pgctrl_write(struct file* file, const char __user * buf, size_t count, loff_t *ppos);
+static int proc_if_read(char *buf , char **start, off_t offset, int len, int *eof, void *data);
+
+static int proc_thread_read(char *buf , char **start, off_t offset, int len, int *eof, void *data);
+static int proc_if_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data);
+static int proc_thread_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data);
+static int create_proc_dir(void);
+static int remove_proc_dir(void);
+
+static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i);
+static int pktgen_add_device(struct pktgen_thread* t, const char* ifname);
+static struct pktgen_thread* pktgen_find_thread(const char* name);
+static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread* t, const char* ifname);
+static int pktgen_device_event(struct notifier_block *, unsigned long, void *);
+static void pktgen_run_all_threads(void);
+static void pktgen_stop_all_threads_ifs(void);
+static int pktgen_stop_device(struct pktgen_dev *pkt_dev);
+static void pktgen_stop(struct pktgen_thread* t);
+static void pktgen_clear_counters(struct pktgen_dev *pkt_dev);
+static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove);
+static unsigned int scan_ip6(const char *s,char ip[16]);
+static unsigned int fmt_ip6(char *s,const char ip[16]);
+
+/* Module parameters, defaults. */
+static int pg_count_d = 1000; /* 1000 pkts by default */
+static int pg_delay_d = 0;
+static int pg_clone_skb_d = 0;
+static int debug = 0;
+
+static spinlock_t _thread_lock = SPIN_LOCK_UNLOCKED;
+static struct pktgen_thread *pktgen_threads = NULL;
+
+static char module_fname[128];
+static struct proc_dir_entry *module_proc_ent = NULL;
+
+static struct notifier_block pktgen_notifier_block = {
+ .notifier_call = pktgen_device_event,
+};
+
+static struct file_operations pktgen_fops = {
+ .read = proc_pgctrl_read,
+ .write = proc_pgctrl_write,
+ /* .ioctl = pktgen_ioctl, later maybe */
+};
+
+/*
+ * /proc handling functions
+ *
+ */
+
+static struct proc_dir_entry *pg_proc_dir = NULL;
+static int proc_pgctrl_read_eof=0;
+
+static ssize_t proc_pgctrl_read(struct file* file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ char data[200];
+ int len = 0;
+
+ if(proc_pgctrl_read_eof) {
+ proc_pgctrl_read_eof=0;
+ len = 0;
+ goto out;
+ }
+
+ sprintf(data, "%s", VERSION);
+
+ len = strlen(data);
+
+ if(len > count) {
+ len =-EFAULT;
+ goto out;
+ }
+
+ if (copy_to_user(buf, data, len)) {
+ len =-EFAULT;
+ goto out;
+ }
+
+ *ppos += len;
+ proc_pgctrl_read_eof=1; /* EOF next call */
+
+ out:
+ return len;
+}
+
+static ssize_t proc_pgctrl_write(struct file* file,const char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ char *data = NULL;
+ int err = 0;
+
+ if (!capable(CAP_NET_ADMIN)){
+ err = -EPERM;
+ goto out;
+ }
+
+ data = (void*)vmalloc ((unsigned int)count);
+
+ if(!data) {
+ err = -ENOMEM;
+ goto out;
+ }
+ if (copy_from_user(data, buf, count)) {
+ err =-EFAULT;
+ goto out_free;
+ }
+ data[count-1] = 0; /* Make string */
+
+ if (!strcmp(data, "stop"))
+ pktgen_stop_all_threads_ifs();
+
+ else if (!strcmp(data, "start"))
+ pktgen_run_all_threads();
+
+ else
+ printk("pktgen: Unknown command: %s\n", data);
+
+ err = count;
+
+ out_free:
+ vfree (data);
+ out:
+ return err;
+}
+
+static int proc_if_read(char *buf , char **start, off_t offset,
+ int len, int *eof, void *data)
+{
+ char *p;
+ int i;
+ struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data);
+ __u64 sa;
+ __u64 stopped;
+ __u64 now = getCurUs();
+
+ p = buf;
+ p += sprintf(p, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n",
+ (unsigned long long) pkt_dev->count,
+ pkt_dev->min_pkt_size, pkt_dev->max_pkt_size);
+
+ p += sprintf(p, " frags: %d delay: %u clone_skb: %d ifname: %s\n",
+ pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname);
+
+ p += sprintf(p, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow);
+
+
+ if(pkt_dev->flags & F_IPV6) {
+ char b1[128], b2[128], b3[128];
+ fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr);
+ fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr);
+ fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr);
+ p += sprintf(p, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3);
+
+ fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr);
+ fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr);
+ fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr);
+ p += sprintf(p, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3);
+
+ }
+ else
+ p += sprintf(p, " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n",
+ pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max);
+
+ p += sprintf(p, " src_mac: ");
+
+ if ((pkt_dev->src_mac[0] == 0) &&
+ (pkt_dev->src_mac[1] == 0) &&
+ (pkt_dev->src_mac[2] == 0) &&
+ (pkt_dev->src_mac[3] == 0) &&
+ (pkt_dev->src_mac[4] == 0) &&
+ (pkt_dev->src_mac[5] == 0))
+
+ for (i = 0; i < 6; i++)
+ p += sprintf(p, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":");
+
+ else
+ for (i = 0; i < 6; i++)
+ p += sprintf(p, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":");
+
+ p += sprintf(p, "dst_mac: ");
+ for (i = 0; i < 6; i++)
+ p += sprintf(p, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":");
+
+ p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n",
+ pkt_dev->udp_src_min, pkt_dev->udp_src_max, pkt_dev->udp_dst_min,
+ pkt_dev->udp_dst_max);
+
+ p += sprintf(p, " src_mac_count: %d dst_mac_count: %d \n Flags: ",
+ pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
+
+
+ if (pkt_dev->flags & F_IPV6)
+ p += sprintf(p, "IPV6 ");
+
+ if (pkt_dev->flags & F_IPSRC_RND)
+ p += sprintf(p, "IPSRC_RND ");
+
+ if (pkt_dev->flags & F_IPDST_RND)
+ p += sprintf(p, "IPDST_RND ");
+
+ if (pkt_dev->flags & F_TXSIZE_RND)
+ p += sprintf(p, "TXSIZE_RND ");
+
+ if (pkt_dev->flags & F_UDPSRC_RND)
+ p += sprintf(p, "UDPSRC_RND ");
+
+ if (pkt_dev->flags & F_UDPDST_RND)
+ p += sprintf(p, "UDPDST_RND ");
+
+ if (pkt_dev->flags & F_MACSRC_RND)
+ p += sprintf(p, "MACSRC_RND ");
+
+ if (pkt_dev->flags & F_MACDST_RND)
+ p += sprintf(p, "MACDST_RND ");
+
+
+ p += sprintf(p, "\n");
+
+ sa = pkt_dev->started_at;
+ stopped = pkt_dev->stopped_at;
+ if (pkt_dev->running)
+ stopped = now; /* not really stopped, more like last-running-at */
+
+ p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n",
+ (unsigned long long) pkt_dev->sofar,
+ (unsigned long long) pkt_dev->errors,
+ (unsigned long long) sa,
+ (unsigned long long) stopped,
+ (unsigned long long) pkt_dev->idle_acc);
+
+ p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n",
+ pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, pkt_dev->cur_src_mac_offset);
+
+ if(pkt_dev->flags & F_IPV6) {
+ char b1[128], b2[128];
+ fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr);
+ fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr);
+ p += sprintf(p, " cur_saddr: %s cur_daddr: %s\n", b2, b1);
+ }
+ else
+ p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x\n",
+ pkt_dev->cur_saddr, pkt_dev->cur_daddr);
+
+
+ p += sprintf(p, " cur_udp_dst: %d cur_udp_src: %d\n",
+ pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src);
+
+ p += sprintf(p, " flows: %u\n", pkt_dev->nflows);
+
+ if (pkt_dev->result[0])
+ p += sprintf(p, "Result: %s\n", pkt_dev->result);
+ else
+ p += sprintf(p, "Result: Idle\n");
+ *eof = 1;
+
+ return p - buf;
+}
+
+
+static int count_trail_chars(const char __user *user_buffer, unsigned int maxlen)
+{
+ int i;
+
+ for (i = 0; i < maxlen; i++) {
+ char c;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ switch (c) {
+ case '\"':
+ case '\n':
+ case '\r':
+ case '\t':
+ case ' ':
+ case '=':
+ break;
+ default:
+ goto done;
+ };
+ }
+done:
+ return i;
+}
+
+static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen,
+ unsigned long *num)
+{
+ int i = 0;
+ *num = 0;
+
+ for(; i < maxlen; i++) {
+ char c;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ if ((c >= '0') && (c <= '9')) {
+ *num *= 10;
+ *num += c -'0';
+ } else
+ break;
+ }
+ return i;
+}
+
+static int strn_len(const char __user *user_buffer, unsigned int maxlen)
+{
+ int i = 0;
+
+ for(; i < maxlen; i++) {
+ char c;
+ if (get_user(c, &user_buffer[i]))
+ return -EFAULT;
+ switch (c) {
+ case '\"':
+ case '\n':
+ case '\r':
+ case '\t':
+ case ' ':
+ goto done_str;
+ break;
+ default:
+ break;
+ };
+ }
+done_str:
+
+ return i;
+}
+
+static int proc_if_write(struct file *file, const char __user *user_buffer,
+ unsigned long count, void *data)
+{
+ int i = 0, max, len;
+ char name[16], valstr[32];
+ unsigned long value = 0;
+ struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data);
+ char* pg_result = NULL;
+ int tmp = 0;
+ char buf[128];
+
+ pg_result = &(pkt_dev->result[0]);
+
+ if (count < 1) {
+ printk("pktgen: wrong command format\n");
+ return -EINVAL;
+ }
+
+ max = count - i;
+ tmp = count_trail_chars(&user_buffer[i], max);
+ if (tmp < 0) {
+ printk("pktgen: illegal format\n");
+ return tmp;
+ }
+ i += tmp;
+
+ /* Read variable name */
+
+ len = strn_len(&user_buffer[i], sizeof(name) - 1);
+ if (len < 0) { return len; }
+ memset(name, 0, sizeof(name));
+ if (copy_from_user(name, &user_buffer[i], len) )
+ return -EFAULT;
+ i += len;
+
+ max = count -i;
+ len = count_trail_chars(&user_buffer[i], max);
+ if (len < 0)
+ return len;
+
+ i += len;
+
+ if (debug) {
+ char tb[count + 1];
+ if (copy_from_user(tb, user_buffer, count))
+ return -EFAULT;
+ tb[count] = 0;
+ printk("pktgen: %s,%lu buffer -:%s:-\n", name, count, tb);
+ }
+
+ if (!strcmp(name, "min_pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value < 14+20+8)
+ value = 14+20+8;
+ if (value != pkt_dev->min_pkt_size) {
+ pkt_dev->min_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: min_pkt_size=%u", pkt_dev->min_pkt_size);
+ return count;
+ }
+
+ if (!strcmp(name, "max_pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value < 14+20+8)
+ value = 14+20+8;
+ if (value != pkt_dev->max_pkt_size) {
+ pkt_dev->max_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: max_pkt_size=%u", pkt_dev->max_pkt_size);
+ return count;
+ }
+
+ /* Shortcut for min = max */
+
+ if (!strcmp(name, "pkt_size")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value < 14+20+8)
+ value = 14+20+8;
+ if (value != pkt_dev->min_pkt_size) {
+ pkt_dev->min_pkt_size = value;
+ pkt_dev->max_pkt_size = value;
+ pkt_dev->cur_pkt_size = value;
+ }
+ sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size);
+ return count;
+ }
+
+ if (!strcmp(name, "debug")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ debug = value;
+ sprintf(pg_result, "OK: debug=%u", debug);
+ return count;
+ }
+
+ if (!strcmp(name, "frags")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ pkt_dev->nfrags = value;
+ sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags);
+ return count;
+ }
+ if (!strcmp(name, "delay")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value == 0x7FFFFFFF) {
+ pkt_dev->delay_us = 0x7FFFFFFF;
+ pkt_dev->delay_ns = 0;
+ } else {
+ pkt_dev->delay_us = value / 1000;
+ pkt_dev->delay_ns = value % 1000;
+ }
+ sprintf(pg_result, "OK: delay=%u", 1000*pkt_dev->delay_us+pkt_dev->delay_ns);
+ return count;
+ }
+ if (!strcmp(name, "udp_src_min")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value != pkt_dev->udp_src_min) {
+ pkt_dev->udp_src_min = value;
+ pkt_dev->cur_udp_src = value;
+ }
+ sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min);
+ return count;
+ }
+ if (!strcmp(name, "udp_dst_min")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value != pkt_dev->udp_dst_min) {
+ pkt_dev->udp_dst_min = value;
+ pkt_dev->cur_udp_dst = value;
+ }
+ sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min);
+ return count;
+ }
+ if (!strcmp(name, "udp_src_max")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value != pkt_dev->udp_src_max) {
+ pkt_dev->udp_src_max = value;
+ pkt_dev->cur_udp_src = value;
+ }
+ sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max);
+ return count;
+ }
+ if (!strcmp(name, "udp_dst_max")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value != pkt_dev->udp_dst_max) {
+ pkt_dev->udp_dst_max = value;
+ pkt_dev->cur_udp_dst = value;
+ }
+ sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max);
+ return count;
+ }
+ if (!strcmp(name, "clone_skb")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ pkt_dev->clone_skb = value;
+
+ sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb);
+ return count;
+ }
+ if (!strcmp(name, "count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ pkt_dev->count = value;
+ sprintf(pg_result, "OK: count=%llu",
+ (unsigned long long) pkt_dev->count);
+ return count;
+ }
+ if (!strcmp(name, "src_mac_count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (pkt_dev->src_mac_count != value) {
+ pkt_dev->src_mac_count = value;
+ pkt_dev->cur_src_mac_offset = 0;
+ }
+ sprintf(pg_result, "OK: src_mac_count=%d", pkt_dev->src_mac_count);
+ return count;
+ }
+ if (!strcmp(name, "dst_mac_count")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (pkt_dev->dst_mac_count != value) {
+ pkt_dev->dst_mac_count = value;
+ pkt_dev->cur_dst_mac_offset = 0;
+ }
+ sprintf(pg_result, "OK: dst_mac_count=%d", pkt_dev->dst_mac_count);
+ return count;
+ }
+ if (!strcmp(name, "flag")) {
+ char f[32];
+ memset(f, 0, 32);
+ len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ if (len < 0) { return len; }
+ if (copy_from_user(f, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+ if (strcmp(f, "IPSRC_RND") == 0)
+ pkt_dev->flags |= F_IPSRC_RND;
+
+ else if (strcmp(f, "!IPSRC_RND") == 0)
+ pkt_dev->flags &= ~F_IPSRC_RND;
+
+ else if (strcmp(f, "TXSIZE_RND") == 0)
+ pkt_dev->flags |= F_TXSIZE_RND;
+
+ else if (strcmp(f, "!TXSIZE_RND") == 0)
+ pkt_dev->flags &= ~F_TXSIZE_RND;
+
+ else if (strcmp(f, "IPDST_RND") == 0)
+ pkt_dev->flags |= F_IPDST_RND;
+
+ else if (strcmp(f, "!IPDST_RND") == 0)
+ pkt_dev->flags &= ~F_IPDST_RND;
+
+ else if (strcmp(f, "UDPSRC_RND") == 0)
+ pkt_dev->flags |= F_UDPSRC_RND;
+
+ else if (strcmp(f, "!UDPSRC_RND") == 0)
+ pkt_dev->flags &= ~F_UDPSRC_RND;
+
+ else if (strcmp(f, "UDPDST_RND") == 0)
+ pkt_dev->flags |= F_UDPDST_RND;
+
+ else if (strcmp(f, "!UDPDST_RND") == 0)
+ pkt_dev->flags &= ~F_UDPDST_RND;
+
+ else if (strcmp(f, "MACSRC_RND") == 0)
+ pkt_dev->flags |= F_MACSRC_RND;
+
+ else if (strcmp(f, "!MACSRC_RND") == 0)
+ pkt_dev->flags &= ~F_MACSRC_RND;
+
+ else if (strcmp(f, "MACDST_RND") == 0)
+ pkt_dev->flags |= F_MACDST_RND;
+
+ else if (strcmp(f, "!MACDST_RND") == 0)
+ pkt_dev->flags &= ~F_MACDST_RND;
+
+ else {
+ sprintf(pg_result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s",
+ f,
+ "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n");
+ return count;
+ }
+ sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags);
+ return count;
+ }
+ if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1);
+ if (len < 0) { return len; }
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->dst_min) != 0) {
+ memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min));
+ strncpy(pkt_dev->dst_min, buf, len);
+ pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
+ pkt_dev->cur_daddr = pkt_dev->daddr_min;
+ }
+ if(debug)
+ printk("pktgen: dst_min set to: %s\n", pkt_dev->dst_min);
+ i += len;
+ sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min);
+ return count;
+ }
+ if (!strcmp(name, "dst_max")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1);
+ if (len < 0) { return len; }
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->dst_max) != 0) {
+ memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max));
+ strncpy(pkt_dev->dst_max, buf, len);
+ pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
+ pkt_dev->cur_daddr = pkt_dev->daddr_max;
+ }
+ if(debug)
+ printk("pktgen: dst_max set to: %s\n", pkt_dev->dst_max);
+ i += len;
+ sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max);
+ return count;
+ }
+ if (!strcmp(name, "dst6")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0) return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ scan_ip6(buf, pkt_dev->in6_daddr.s6_addr);
+ fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr);
+
+ ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr);
+
+ if(debug)
+ printk("pktgen: dst6 set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "dst6_min")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0) return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
+ fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr);
+
+ ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->min_in6_daddr);
+ if(debug)
+ printk("pktgen: dst6_min set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6_min=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "dst6_max")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0) return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
+ fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr);
+
+ if(debug)
+ printk("pktgen: dst6_max set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: dst6_max=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "src6")) {
+ len = strn_len(&user_buffer[i], sizeof(buf) - 1);
+ if (len < 0) return len;
+
+ pkt_dev->flags |= F_IPV6;
+
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ scan_ip6(buf, pkt_dev->in6_saddr.s6_addr);
+ fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr);
+
+ ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr);
+
+ if(debug)
+ printk("pktgen: src6 set to: %s\n", buf);
+
+ i += len;
+ sprintf(pg_result, "OK: src6=%s", buf);
+ return count;
+ }
+ if (!strcmp(name, "src_min")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1);
+ if (len < 0) { return len; }
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->src_min) != 0) {
+ memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min));
+ strncpy(pkt_dev->src_min, buf, len);
+ pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
+ pkt_dev->cur_saddr = pkt_dev->saddr_min;
+ }
+ if(debug)
+ printk("pktgen: src_min set to: %s\n", pkt_dev->src_min);
+ i += len;
+ sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min);
+ return count;
+ }
+ if (!strcmp(name, "src_max")) {
+ len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1);
+ if (len < 0) { return len; }
+ if (copy_from_user(buf, &user_buffer[i], len))
+ return -EFAULT;
+ buf[len] = 0;
+ if (strcmp(buf, pkt_dev->src_max) != 0) {
+ memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max));
+ strncpy(pkt_dev->src_max, buf, len);
+ pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
+ pkt_dev->cur_saddr = pkt_dev->saddr_max;
+ }
+ if(debug)
+ printk("pktgen: src_max set to: %s\n", pkt_dev->src_max);
+ i += len;
+ sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max);
+ return count;
+ }
+ if (!strcmp(name, "dst_mac")) {
+ char *v = valstr;
+ unsigned char old_dmac[6];
+ unsigned char *m = pkt_dev->dst_mac;
+ memcpy(old_dmac, pkt_dev->dst_mac, 6);
+
+ len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
+ if (len < 0) { return len; }
+ memset(valstr, 0, sizeof(valstr));
+ if( copy_from_user(valstr, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+
+ for(*m = 0;*v && m < pkt_dev->dst_mac + 6; v++) {
+ if (*v >= '0' && *v <= '9') {
+ *m *= 16;
+ *m += *v - '0';
+ }
+ if (*v >= 'A' && *v <= 'F') {
+ *m *= 16;
+ *m += *v - 'A' + 10;
+ }
+ if (*v >= 'a' && *v <= 'f') {
+ *m *= 16;
+ *m += *v - 'a' + 10;
+ }
+ if (*v == ':') {
+ m++;
+ *m = 0;
+ }
+ }
+
+ /* Set up Dest MAC */
+ if (memcmp(old_dmac, pkt_dev->dst_mac, 6) != 0)
+ memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6);
+
+ sprintf(pg_result, "OK: dstmac");
+ return count;
+ }
+ if (!strcmp(name, "src_mac")) {
+ char *v = valstr;
+ unsigned char *m = pkt_dev->src_mac;
+
+ len = strn_len(&user_buffer[i], sizeof(valstr) - 1);
+ if (len < 0) { return len; }
+ memset(valstr, 0, sizeof(valstr));
+ if( copy_from_user(valstr, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+
+ for(*m = 0;*v && m < pkt_dev->src_mac + 6; v++) {
+ if (*v >= '0' && *v <= '9') {
+ *m *= 16;
+ *m += *v - '0';
+ }
+ if (*v >= 'A' && *v <= 'F') {
+ *m *= 16;
+ *m += *v - 'A' + 10;
+ }
+ if (*v >= 'a' && *v <= 'f') {
+ *m *= 16;
+ *m += *v - 'a' + 10;
+ }
+ if (*v == ':') {
+ m++;
+ *m = 0;
+ }
+ }
+
+ sprintf(pg_result, "OK: srcmac");
+ return count;
+ }
+
+ if (!strcmp(name, "clear_counters")) {
+ pktgen_clear_counters(pkt_dev);
+ sprintf(pg_result, "OK: Clearing counters.\n");
+ return count;
+ }
+
+ if (!strcmp(name, "flows")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ if (value > MAX_CFLOWS)
+ value = MAX_CFLOWS;
+
+ pkt_dev->cflows = value;
+ sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows);
+ return count;
+ }
+
+ if (!strcmp(name, "flowlen")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ if (len < 0) { return len; }
+ i += len;
+ pkt_dev->lflow = value;
+ sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow);
+ return count;
+ }
+
+ sprintf(pkt_dev->result, "No such parameter \"%s\"", name);
+ return -EINVAL;
+}
+
+static int proc_thread_read(char *buf , char **start, off_t offset,
+ int len, int *eof, void *data)
+{
+ char *p;
+ struct pktgen_thread *t = (struct pktgen_thread*)(data);
+ struct pktgen_dev *pkt_dev = NULL;
+
+
+ if (!t) {
+ printk("pktgen: ERROR: could not find thread in proc_thread_read\n");
+ return -EINVAL;
+ }
+
+ p = buf;
+ p += sprintf(p, "Name: %s max_before_softirq: %d\n",
+ t->name, t->max_before_softirq);
+
+ p += sprintf(p, "Running: ");
+
+ if_lock(t);
+ for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
+ if(pkt_dev->running)
+ p += sprintf(p, "%s ", pkt_dev->ifname);
+
+ p += sprintf(p, "\nStopped: ");
+
+ for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next)
+ if(!pkt_dev->running)
+ p += sprintf(p, "%s ", pkt_dev->ifname);
+
+ if (t->result[0])
+ p += sprintf(p, "\nResult: %s\n", t->result);
+ else
+ p += sprintf(p, "\nResult: NA\n");
+
+ *eof = 1;
+
+ if_unlock(t);
+
+ return p - buf;
+}
+
+static int proc_thread_write(struct file *file, const char __user *user_buffer,
+ unsigned long count, void *data)
+{
+ int i = 0, max, len, ret;
+ char name[40];
+ struct pktgen_thread *t;
+ char *pg_result;
+ unsigned long value = 0;
+
+ if (count < 1) {
+ // sprintf(pg_result, "Wrong command format");
+ return -EINVAL;
+ }
+
+ max = count - i;
+ len = count_trail_chars(&user_buffer[i], max);
+ if (len < 0)
+ return len;
+
+ i += len;
+
+ /* Read variable name */
+
+ len = strn_len(&user_buffer[i], sizeof(name) - 1);
+ if (len < 0)
+ return len;
+
+ memset(name, 0, sizeof(name));
+ if (copy_from_user(name, &user_buffer[i], len))
+ return -EFAULT;
+ i += len;
+
+ max = count -i;
+ len = count_trail_chars(&user_buffer[i], max);
+ if (len < 0)
+ return len;
+
+ i += len;
+
+ if (debug)
+ printk("pktgen: t=%s, count=%lu\n", name, count);
+
+
+ t = (struct pktgen_thread*)(data);
+ if(!t) {
+ printk("pktgen: ERROR: No thread\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ pg_result = &(t->result[0]);
+
+ if (!strcmp(name, "add_device")) {
+ char f[32];
+ memset(f, 0, 32);
+ len = strn_len(&user_buffer[i], sizeof(f) - 1);
+ if (len < 0) {
+ ret = len;
+ goto out;
+ }
+ if( copy_from_user(f, &user_buffer[i], len) )
+ return -EFAULT;
+ i += len;
+ thread_lock();
+ pktgen_add_device(t, f);
+ thread_unlock();
+ ret = count;
+ sprintf(pg_result, "OK: add_device=%s", f);
+ goto out;
+ }
+
+ if (!strcmp(name, "rem_device_all")) {
+ thread_lock();
+ t->control |= T_REMDEV;
+ thread_unlock();
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(HZ/8); /* Propagate thread->control */
+ ret = count;
+ sprintf(pg_result, "OK: rem_device_all");
+ goto out;
+ }
+
+ if (!strcmp(name, "max_before_softirq")) {
+ len = num_arg(&user_buffer[i], 10, &value);
+ thread_lock();
+ t->max_before_softirq = value;
+ thread_unlock();
+ ret = count;
+ sprintf(pg_result, "OK: max_before_softirq=%lu", value);
+ goto out;
+ }
+
+ ret = -EINVAL;
+ out:
+
+ return ret;
+}
+
+static int create_proc_dir(void)
+{
+ int len;
+ /* does proc_dir already exists */
+ len = strlen(PG_PROC_DIR);
+
+ for (pg_proc_dir = proc_net->subdir; pg_proc_dir; pg_proc_dir=pg_proc_dir->next) {
+ if ((pg_proc_dir->namelen == len) &&
+ (! memcmp(pg_proc_dir->name, PG_PROC_DIR, len)))
+ break;
+ }
+
+ if (!pg_proc_dir)
+ pg_proc_dir = create_proc_entry(PG_PROC_DIR, S_IFDIR, proc_net);
+
+ if (!pg_proc_dir)
+ return -ENODEV;
+
+ return 0;
+}
+
+static int remove_proc_dir(void)
+{
+ remove_proc_entry(PG_PROC_DIR, proc_net);
+ return 0;
+}
+
+/* Think find or remove for NN */
+static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove)
+{
+ struct pktgen_thread *t;
+ struct pktgen_dev *pkt_dev = NULL;
+
+ t = pktgen_threads;
+
+ while (t) {
+ pkt_dev = pktgen_find_dev(t, ifname);
+ if (pkt_dev) {
+ if(remove) {
+ if_lock(t);
+ pktgen_remove_device(t, pkt_dev);
+ if_unlock(t);
+ }
+ break;
+ }
+ t = t->next;
+ }
+ return pkt_dev;
+}
+
+static struct pktgen_dev *pktgen_NN_threads(const char* ifname, int remove)
+{
+ struct pktgen_dev *pkt_dev = NULL;
+ thread_lock();
+ pkt_dev = __pktgen_NN_threads(ifname, remove);
+ thread_unlock();
+ return pkt_dev;
+}
+
+static int pktgen_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
+{
+ struct net_device *dev = (struct net_device *)(ptr);
+
+ /* It is OK that we do not hold the group lock right now,
+ * as we run under the RTNL lock.
+ */
+
+ switch (event) {
+ case NETDEV_CHANGEADDR:
+ case NETDEV_GOING_DOWN:
+ case NETDEV_DOWN:
+ case NETDEV_UP:
+ /* Ignore for now */
+ break;
+
+ case NETDEV_UNREGISTER:
+ pktgen_NN_threads(dev->name, REMOVE);
+ break;
+ };
+
+ return NOTIFY_DONE;
+}
+
+/* Associate pktgen_dev with a device. */
+
+static struct net_device* pktgen_setup_dev(struct pktgen_dev *pkt_dev) {
+ struct net_device *odev;
+
+ /* Clean old setups */
+
+ if (pkt_dev->odev) {
+ dev_put(pkt_dev->odev);
+ pkt_dev->odev = NULL;
+ }
+
+ odev = dev_get_by_name(pkt_dev->ifname);
+
+ if (!odev) {
+ printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname);
+ goto out;
+ }
+ if (odev->type != ARPHRD_ETHER) {
+ printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev->ifname);
+ goto out_put;
+ }
+ if (!netif_running(odev)) {
+ printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname);
+ goto out_put;
+ }
+ pkt_dev->odev = odev;
+
+ return pkt_dev->odev;
+
+out_put:
+ dev_put(odev);
+out:
+ return NULL;
+
+}
+
+/* Read pkt_dev from the interface and set up internal pktgen_dev
+ * structure to have the right information to create/send packets
+ */
+static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
+{
+ /* Try once more, just in case it works now. */
+ if (!pkt_dev->odev)
+ pktgen_setup_dev(pkt_dev);
+
+ if (!pkt_dev->odev) {
+ printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n");
+ sprintf(pkt_dev->result, "ERROR: pkt_dev->odev == NULL in setup_inject.\n");
+ return;
+ }
+
+ /* Default to the interface's mac if not explicitly set. */
+
+ if ((pkt_dev->src_mac[0] == 0) &&
+ (pkt_dev->src_mac[1] == 0) &&
+ (pkt_dev->src_mac[2] == 0) &&
+ (pkt_dev->src_mac[3] == 0) &&
+ (pkt_dev->src_mac[4] == 0) &&
+ (pkt_dev->src_mac[5] == 0)) {
+
+ memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, 6);
+ }
+ /* Set up Dest MAC */
+ memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6);
+
+ /* Set up pkt size */
+ pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size;
+
+ if(pkt_dev->flags & F_IPV6) {
+ /*
+ * Skip this automatic address setting until locks or functions
+ * gets exported
+ */
+
+#ifdef NOTNOW
+ int i, set = 0, err=1;
+ struct inet6_dev *idev;
+
+ for(i=0; i< IN6_ADDR_HSIZE; i++)
+ if(pkt_dev->cur_in6_saddr.s6_addr[i]) {
+ set = 1;
+ break;
+ }
+
+ if(!set) {
+
+ /*
+ * Use linklevel address if unconfigured.
+ *
+ * use ipv6_get_lladdr if/when it's get exported
+ */
+
+
+ read_lock(&addrconf_lock);
+ if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) {
+ struct inet6_ifaddr *ifp;
+
+ read_lock_bh(&idev->lock);
+ for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) {
+ if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
+ ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &ifp->addr);
+ err = 0;
+ break;
+ }
+ }
+ read_unlock_bh(&idev->lock);
+ }
+ read_unlock(&addrconf_lock);
+ if(err) printk("pktgen: ERROR: IPv6 link address not availble.\n");
+ }
+#endif
+ }
+ else {
+ pkt_dev->saddr_min = 0;
+ pkt_dev->saddr_max = 0;
+ if (strlen(pkt_dev->src_min) == 0) {
+
+ struct in_device *in_dev;
+
+ rcu_read_lock();
+ in_dev = __in_dev_get(pkt_dev->odev);
+ if (in_dev) {
+ if (in_dev->ifa_list) {
+ pkt_dev->saddr_min = in_dev->ifa_list->ifa_address;
+ pkt_dev->saddr_max = pkt_dev->saddr_min;
+ }
+ __in_dev_put(in_dev);
+ }
+ rcu_read_unlock();
+ }
+ else {
+ pkt_dev->saddr_min = in_aton(pkt_dev->src_min);
+ pkt_dev->saddr_max = in_aton(pkt_dev->src_max);
+ }
+
+ pkt_dev->daddr_min = in_aton(pkt_dev->dst_min);
+ pkt_dev->daddr_max = in_aton(pkt_dev->dst_max);
+ }
+ /* Initialize current values. */
+ pkt_dev->cur_dst_mac_offset = 0;
+ pkt_dev->cur_src_mac_offset = 0;
+ pkt_dev->cur_saddr = pkt_dev->saddr_min;
+ pkt_dev->cur_daddr = pkt_dev->daddr_min;
+ pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
+ pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
+ pkt_dev->nflows = 0;
+}
+
+static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us)
+{
+ __u64 start;
+ __u64 now;
+
+ start = now = getCurUs();
+ printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now));
+ while (now < spin_until_us) {
+ /* TODO: optimise sleeping behavior */
+ if (spin_until_us - now > (1000000/HZ)+1) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(1);
+ } else if (spin_until_us - now > 100) {
+ do_softirq();
+ if (!pkt_dev->running)
+ return;
+ if (need_resched())
+ schedule();
+ }
+
+ now = getCurUs();
+ }
+
+ pkt_dev->idle_acc += now - start;
+}
+
+
+/* Increment/randomize headers according to flags and current values
+ * for IP src/dest, UDP src/dst port, MAC-Addr src/dst
+ */
+static void mod_cur_headers(struct pktgen_dev *pkt_dev) {
+ __u32 imn;
+ __u32 imx;
+ int flow = 0;
+
+ if(pkt_dev->cflows) {
+ flow = pktgen_random() % pkt_dev->cflows;
+
+ if (pkt_dev->flows[flow].count > pkt_dev->lflow)
+ pkt_dev->flows[flow].count = 0;
+ }
+
+
+ /* Deal with source MAC */
+ if (pkt_dev->src_mac_count > 1) {
+ __u32 mc;
+ __u32 tmp;
+
+ if (pkt_dev->flags & F_MACSRC_RND)
+ mc = pktgen_random() % (pkt_dev->src_mac_count);
+ else {
+ mc = pkt_dev->cur_src_mac_offset++;
+ if (pkt_dev->cur_src_mac_offset > pkt_dev->src_mac_count)
+ pkt_dev->cur_src_mac_offset = 0;
+ }
+
+ tmp = pkt_dev->src_mac[5] + (mc & 0xFF);
+ pkt_dev->hh[11] = tmp;
+ tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[10] = tmp;
+ tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[9] = tmp;
+ tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[8] = tmp;
+ tmp = (pkt_dev->src_mac[1] + (tmp >> 8));
+ pkt_dev->hh[7] = tmp;
+ }
+
+ /* Deal with Destination MAC */
+ if (pkt_dev->dst_mac_count > 1) {
+ __u32 mc;
+ __u32 tmp;
+
+ if (pkt_dev->flags & F_MACDST_RND)
+ mc = pktgen_random() % (pkt_dev->dst_mac_count);
+
+ else {
+ mc = pkt_dev->cur_dst_mac_offset++;
+ if (pkt_dev->cur_dst_mac_offset > pkt_dev->dst_mac_count) {
+ pkt_dev->cur_dst_mac_offset = 0;
+ }
+ }
+
+ tmp = pkt_dev->dst_mac[5] + (mc & 0xFF);
+ pkt_dev->hh[5] = tmp;
+ tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[4] = tmp;
+ tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[3] = tmp;
+ tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8));
+ pkt_dev->hh[2] = tmp;
+ tmp = (pkt_dev->dst_mac[1] + (tmp >> 8));
+ pkt_dev->hh[1] = tmp;
+ }
+
+ if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) {
+ if (pkt_dev->flags & F_UDPSRC_RND)
+ pkt_dev->cur_udp_src = ((pktgen_random() % (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) + pkt_dev->udp_src_min);
+
+ else {
+ pkt_dev->cur_udp_src++;
+ if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max)
+ pkt_dev->cur_udp_src = pkt_dev->udp_src_min;
+ }
+ }
+
+ if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) {
+ if (pkt_dev->flags & F_UDPDST_RND) {
+ pkt_dev->cur_udp_dst = ((pktgen_random() % (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) + pkt_dev->udp_dst_min);
+ }
+ else {
+ pkt_dev->cur_udp_dst++;
+ if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max)
+ pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min;
+ }
+ }
+
+ if (!(pkt_dev->flags & F_IPV6)) {
+
+ if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = ntohl(pkt_dev->saddr_max))) {
+ __u32 t;
+ if (pkt_dev->flags & F_IPSRC_RND)
+ t = ((pktgen_random() % (imx - imn)) + imn);
+ else {
+ t = ntohl(pkt_dev->cur_saddr);
+ t++;
+ if (t > imx) {
+ t = imn;
+ }
+ }
+ pkt_dev->cur_saddr = htonl(t);
+ }
+
+ if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) {
+ pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr;
+ } else {
+
+ if ((imn = ntohl(pkt_dev->daddr_min)) < (imx = ntohl(pkt_dev->daddr_max))) {
+ __u32 t;
+ if (pkt_dev->flags & F_IPDST_RND) {
+
+ t = ((pktgen_random() % (imx - imn)) + imn);
+ t = htonl(t);
+
+ while( LOOPBACK(t) || MULTICAST(t) || BADCLASS(t) || ZERONET(t) || LOCAL_MCAST(t) ) {
+ t = ((pktgen_random() % (imx - imn)) + imn);
+ t = htonl(t);
+ }
+ pkt_dev->cur_daddr = t;
+ }
+
+ else {
+ t = ntohl(pkt_dev->cur_daddr);
+ t++;
+ if (t > imx) {
+ t = imn;
+ }
+ pkt_dev->cur_daddr = htonl(t);
+ }
+ }
+ if(pkt_dev->cflows) {
+ pkt_dev->flows[flow].cur_daddr = pkt_dev->cur_daddr;
+ pkt_dev->nflows++;
+ }
+ }
+ }
+ else /* IPV6 * */
+ {
+ if(pkt_dev->min_in6_daddr.s6_addr32[0] == 0 &&
+ pkt_dev->min_in6_daddr.s6_addr32[1] == 0 &&
+ pkt_dev->min_in6_daddr.s6_addr32[2] == 0 &&
+ pkt_dev->min_in6_daddr.s6_addr32[3] == 0);
+ else {
+ int i;
+
+ /* Only random destinations yet */
+
+ for(i=0; i < 4; i++) {
+ pkt_dev->cur_in6_daddr.s6_addr32[i] =
+ ((pktgen_random() |
+ pkt_dev->min_in6_daddr.s6_addr32[i]) &
+ pkt_dev->max_in6_daddr.s6_addr32[i]);
+ }
+ }
+ }
+
+ if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) {
+ __u32 t;
+ if (pkt_dev->flags & F_TXSIZE_RND) {
+ t = ((pktgen_random() % (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size))
+ + pkt_dev->min_pkt_size);
+ }
+ else {
+ t = pkt_dev->cur_pkt_size + 1;
+ if (t > pkt_dev->max_pkt_size)
+ t = pkt_dev->min_pkt_size;
+ }
+ pkt_dev->cur_pkt_size = t;
+ }
+
+ pkt_dev->flows[flow].count++;
+}
+
+
+static struct sk_buff *fill_packet_ipv4(struct net_device *odev,
+ struct pktgen_dev *pkt_dev)
+{
+ struct sk_buff *skb = NULL;
+ __u8 *eth;
+ struct udphdr *udph;
+ int datalen, iplen;
+ struct iphdr *iph;
+ struct pktgen_hdr *pgh = NULL;
+
+ skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
+ if (!skb) {
+ sprintf(pkt_dev->result, "No memory");
+ return NULL;
+ }
+
+ skb_reserve(skb, 16);
+
+ /* Reserve for ethernet and IP header */
+ eth = (__u8 *) skb_push(skb, 14);
+ iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr));
+ udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
+
+ /* Update any of the values, used when we're incrementing various
+ * fields.
+ */
+ mod_cur_headers(pkt_dev);
+
+ memcpy(eth, pkt_dev->hh, 12);
+ *(u16*)ð[12] = __constant_htons(ETH_P_IP);
+
+ datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */
+ if (datalen < sizeof(struct pktgen_hdr))
+ datalen = sizeof(struct pktgen_hdr);
+
+ udph->source = htons(pkt_dev->cur_udp_src);
+ udph->dest = htons(pkt_dev->cur_udp_dst);
+ udph->len = htons(datalen + 8); /* DATA + udphdr */
+ udph->check = 0; /* No checksum */
+
+ iph->ihl = 5;
+ iph->version = 4;
+ iph->ttl = 32;
+ iph->tos = 0;
+ iph->protocol = IPPROTO_UDP; /* UDP */
+ iph->saddr = pkt_dev->cur_saddr;
+ iph->daddr = pkt_dev->cur_daddr;
+ iph->frag_off = 0;
+ iplen = 20 + 8 + datalen;
+ iph->tot_len = htons(iplen);
+ iph->check = 0;
+ iph->check = ip_fast_csum((void *) iph, iph->ihl);
+ skb->protocol = __constant_htons(ETH_P_IP);
+ skb->mac.raw = ((u8 *)iph) - 14;
+ skb->dev = odev;
+ skb->pkt_type = PACKET_HOST;
+
+ if (pkt_dev->nfrags <= 0)
+ pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
+ else {
+ int frags = pkt_dev->nfrags;
+ int i;
+
+ pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
+
+ if (frags > MAX_SKB_FRAGS)
+ frags = MAX_SKB_FRAGS;
+ if (datalen > frags*PAGE_SIZE) {
+ skb_put(skb, datalen-frags*PAGE_SIZE);
+ datalen = frags*PAGE_SIZE;
+ }
+
+ i = 0;
+ while (datalen > 0) {
+ struct page *page = alloc_pages(GFP_KERNEL, 0);
+ skb_shinfo(skb)->frags[i].page = page;
+ skb_shinfo(skb)->frags[i].page_offset = 0;
+ skb_shinfo(skb)->frags[i].size =
+ (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
+ datalen -= skb_shinfo(skb)->frags[i].size;
+ skb->len += skb_shinfo(skb)->frags[i].size;
+ skb->data_len += skb_shinfo(skb)->frags[i].size;
+ i++;
+ skb_shinfo(skb)->nr_frags = i;
+ }
+
+ while (i < frags) {
+ int rem;
+
+ if (i == 0)
+ break;
+
+ rem = skb_shinfo(skb)->frags[i - 1].size / 2;
+ if (rem == 0)
+ break;
+
+ skb_shinfo(skb)->frags[i - 1].size -= rem;
+
+ skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
+ get_page(skb_shinfo(skb)->frags[i].page);
+ skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
+ skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
+ skb_shinfo(skb)->frags[i].size = rem;
+ i++;
+ skb_shinfo(skb)->nr_frags = i;
+ }
+ }
+
+ /* Stamp the time, and sequence number, convert them to network byte order */
+
+ if (pgh) {
+ struct timeval timestamp;
+
+ pgh->pgh_magic = htonl(PKTGEN_MAGIC);
+ pgh->seq_num = htonl(pkt_dev->seq_num);
+
+ do_gettimeofday(×tamp);
+ pgh->tv_sec = htonl(timestamp.tv_sec);
+ pgh->tv_usec = htonl(timestamp.tv_usec);
+ }
+ pkt_dev->seq_num++;
+
+ return skb;
+}
+
+/*
+ * scan_ip6, fmt_ip taken from dietlibc-0.21
+ * Author Felix von Leitner <felix-dietlibc@fefe.de>
+ *
+ * Slightly modified for kernel.
+ * Should be candidate for net/ipv4/utils.c
+ * --ro
+ */
+
+static unsigned int scan_ip6(const char *s,char ip[16])
+{
+ unsigned int i;
+ unsigned int len=0;
+ unsigned long u;
+ char suffix[16];
+ unsigned int prefixlen=0;
+ unsigned int suffixlen=0;
+ __u32 tmp;
+
+ for (i=0; i<16; i++) ip[i]=0;
+
+ for (;;) {
+ if (*s == ':') {
+ len++;
+ if (s[1] == ':') { /* Found "::", skip to part 2 */
+ s+=2;
+ len++;
+ break;
+ }
+ s++;
+ }
+ {
+ char *tmp;
+ u=simple_strtoul(s,&tmp,16);
+ i=tmp-s;
+ }
+
+ if (!i) return 0;
+ if (prefixlen==12 && s[i]=='.') {
+
+ /* the last 4 bytes may be written as IPv4 address */
+
+ tmp = in_aton(s);
+ memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp));
+ return i+len;
+ }
+ ip[prefixlen++] = (u >> 8);
+ ip[prefixlen++] = (u & 255);
+ s += i; len += i;
+ if (prefixlen==16)
+ return len;
+ }
+
+/* part 2, after "::" */
+ for (;;) {
+ if (*s == ':') {
+ if (suffixlen==0)
+ break;
+ s++;
+ len++;
+ } else if (suffixlen!=0)
+ break;
+ {
+ char *tmp;
+ u=simple_strtol(s,&tmp,16);
+ i=tmp-s;
+ }
+ if (!i) {
+ if (*s) len--;
+ break;
+ }
+ if (suffixlen+prefixlen<=12 && s[i]=='.') {
+ tmp = in_aton(s);
+ memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp));
+ suffixlen+=4;
+ len+=strlen(s);
+ break;
+ }
+ suffix[suffixlen++] = (u >> 8);
+ suffix[suffixlen++] = (u & 255);
+ s += i; len += i;
+ if (prefixlen+suffixlen==16)
+ break;
+ }
+ for (i=0; i<suffixlen; i++)
+ ip[16-suffixlen+i] = suffix[i];
+ return len;
+}
+
+static char tohex(char hexdigit) {
+ return hexdigit>9?hexdigit+'a'-10:hexdigit+'0';
+}
+
+static int fmt_xlong(char* s,unsigned int i) {
+ char* bak=s;
+ *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s;
+ *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s;
+ *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s;
+ *s=tohex(i&0xf);
+ return s-bak+1;
+}
+
+static unsigned int fmt_ip6(char *s,const char ip[16]) {
+ unsigned int len;
+ unsigned int i;
+ unsigned int temp;
+ unsigned int compressing;
+ int j;
+
+ len = 0; compressing = 0;
+ for (j=0; j<16; j+=2) {
+
+#ifdef V4MAPPEDPREFIX
+ if (j==12 && !memcmp(ip,V4mappedprefix,12)) {
+ inet_ntoa_r(*(struct in_addr*)(ip+12),s);
+ temp=strlen(s);
+ return len+temp;
+ }
+#endif
+ temp = ((unsigned long) (unsigned char) ip[j] << 8) +
+ (unsigned long) (unsigned char) ip[j+1];
+ if (temp == 0) {
+ if (!compressing) {
+ compressing=1;
+ if (j==0) {
+ *s++=':'; ++len;
+ }
+ }
+ } else {
+ if (compressing) {
+ compressing=0;
+ *s++=':'; ++len;
+ }
+ i = fmt_xlong(s,temp); len += i; s += i;
+ if (j<14) {
+ *s++ = ':';
+ ++len;
+ }
+ }
+ }
+ if (compressing) {
+ *s++=':'; ++len;
+ }
+ *s=0;
+ return len;
+}
+
+static struct sk_buff *fill_packet_ipv6(struct net_device *odev,
+ struct pktgen_dev *pkt_dev)
+{
+ struct sk_buff *skb = NULL;
+ __u8 *eth;
+ struct udphdr *udph;
+ int datalen;
+ struct ipv6hdr *iph;
+ struct pktgen_hdr *pgh = NULL;
+
+ skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC);
+ if (!skb) {
+ sprintf(pkt_dev->result, "No memory");
+ return NULL;
+ }
+
+ skb_reserve(skb, 16);
+
+ /* Reserve for ethernet and IP header */
+ eth = (__u8 *) skb_push(skb, 14);
+ iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr));
+ udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr));
+
+
+ /* Update any of the values, used when we're incrementing various
+ * fields.
+ */
+ mod_cur_headers(pkt_dev);
+
+
+ memcpy(eth, pkt_dev->hh, 12);
+ *(u16*)ð[12] = __constant_htons(ETH_P_IPV6);
+
+
+ datalen = pkt_dev->cur_pkt_size-14-
+ sizeof(struct ipv6hdr)-sizeof(struct udphdr); /* Eth + IPh + UDPh */
+
+ if (datalen < sizeof(struct pktgen_hdr)) {
+ datalen = sizeof(struct pktgen_hdr);
+ if (net_ratelimit())
+ printk(KERN_INFO "pktgen: increased datalen to %d\n", datalen);
+ }
+
+ udph->source = htons(pkt_dev->cur_udp_src);
+ udph->dest = htons(pkt_dev->cur_udp_dst);
+ udph->len = htons(datalen + sizeof(struct udphdr));
+ udph->check = 0; /* No checksum */
+
+ *(u32*)iph = __constant_htonl(0x60000000); /* Version + flow */
+
+ iph->hop_limit = 32;
+
+ iph->payload_len = htons(sizeof(struct udphdr) + datalen);
+ iph->nexthdr = IPPROTO_UDP;
+
+ ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr);
+ ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr);
+
+ skb->mac.raw = ((u8 *)iph) - 14;
+ skb->protocol = __constant_htons(ETH_P_IPV6);
+ skb->dev = odev;
+ skb->pkt_type = PACKET_HOST;
+
+ if (pkt_dev->nfrags <= 0)
+ pgh = (struct pktgen_hdr *)skb_put(skb, datalen);
+ else {
+ int frags = pkt_dev->nfrags;
+ int i;
+
+ pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8);
+
+ if (frags > MAX_SKB_FRAGS)
+ frags = MAX_SKB_FRAGS;
+ if (datalen > frags*PAGE_SIZE) {
+ skb_put(skb, datalen-frags*PAGE_SIZE);
+ datalen = frags*PAGE_SIZE;
+ }
+
+ i = 0;
+ while (datalen > 0) {
+ struct page *page = alloc_pages(GFP_KERNEL, 0);
+ skb_shinfo(skb)->frags[i].page = page;
+ skb_shinfo(skb)->frags[i].page_offset = 0;
+ skb_shinfo(skb)->frags[i].size =
+ (datalen < PAGE_SIZE ? datalen : PAGE_SIZE);
+ datalen -= skb_shinfo(skb)->frags[i].size;
+ skb->len += skb_shinfo(skb)->frags[i].size;
+ skb->data_len += skb_shinfo(skb)->frags[i].size;
+ i++;
+ skb_shinfo(skb)->nr_frags = i;
+ }
+
+ while (i < frags) {
+ int rem;
+
+ if (i == 0)
+ break;
+
+ rem = skb_shinfo(skb)->frags[i - 1].size / 2;
+ if (rem == 0)
+ break;
+
+ skb_shinfo(skb)->frags[i - 1].size -= rem;
+
+ skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1];
+ get_page(skb_shinfo(skb)->frags[i].page);
+ skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page;
+ skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size;
+ skb_shinfo(skb)->frags[i].size = rem;
+ i++;
+ skb_shinfo(skb)->nr_frags = i;
+ }
+ }
+
+ /* Stamp the time, and sequence number, convert them to network byte order */
+ /* should we update cloned packets too ? */
+ if (pgh) {
+ struct timeval timestamp;
+
+ pgh->pgh_magic = htonl(PKTGEN_MAGIC);
+ pgh->seq_num = htonl(pkt_dev->seq_num);
+
+ do_gettimeofday(×tamp);
+ pgh->tv_sec = htonl(timestamp.tv_sec);
+ pgh->tv_usec = htonl(timestamp.tv_usec);
+ }
+ pkt_dev->seq_num++;
+
+ return skb;
+}
+
+static inline struct sk_buff *fill_packet(struct net_device *odev,
+ struct pktgen_dev *pkt_dev)
+{
+ if(pkt_dev->flags & F_IPV6)
+ return fill_packet_ipv6(odev, pkt_dev);
+ else
+ return fill_packet_ipv4(odev, pkt_dev);
+}
+
+static void pktgen_clear_counters(struct pktgen_dev *pkt_dev)
+{
+ pkt_dev->seq_num = 1;
+ pkt_dev->idle_acc = 0;
+ pkt_dev->sofar = 0;
+ pkt_dev->tx_bytes = 0;
+ pkt_dev->errors = 0;
+}
+
+/* Set up structure for sending pkts, clear counters */
+
+static void pktgen_run(struct pktgen_thread *t)
+{
+ struct pktgen_dev *pkt_dev = NULL;
+ int started = 0;
+
+ PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t));
+
+ if_lock(t);
+ for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
+
+ /*
+ * setup odev and create initial packet.
+ */
+ pktgen_setup_inject(pkt_dev);
+
+ if(pkt_dev->odev) {
+ pktgen_clear_counters(pkt_dev);
+ pkt_dev->running = 1; /* Cranke yeself! */
+ pkt_dev->skb = NULL;
+ pkt_dev->started_at = getCurUs();
+ pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */
+ pkt_dev->next_tx_ns = 0;
+
+ strcpy(pkt_dev->result, "Starting");
+ started++;
+ }
+ else
+ strcpy(pkt_dev->result, "Error starting");
+ }
+ if_unlock(t);
+ if(started) t->control &= ~(T_STOP);
+}
+
+static void pktgen_stop_all_threads_ifs(void)
+{
+ struct pktgen_thread *t = pktgen_threads;
+
+ PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n"));
+
+ thread_lock();
+ while(t) {
+ pktgen_stop(t);
+ t = t->next;
+ }
+ thread_unlock();
+}
+
+static int thread_is_running(struct pktgen_thread *t )
+{
+ struct pktgen_dev *next;
+ int res = 0;
+
+ for(next=t->if_list; next; next=next->next) {
+ if(next->running) {
+ res = 1;
+ break;
+ }
+ }
+ return res;
+}
+
+static int pktgen_wait_thread_run(struct pktgen_thread *t )
+{
+ if_lock(t);
+
+ while(thread_is_running(t)) {
+
+ if_unlock(t);
+
+ msleep_interruptible(100);
+
+ if (signal_pending(current))
+ goto signal;
+ if_lock(t);
+ }
+ if_unlock(t);
+ return 1;
+ signal:
+ return 0;
+}
+
+static int pktgen_wait_all_threads_run(void)
+{
+ struct pktgen_thread *t = pktgen_threads;
+ int sig = 1;
+
+ while (t) {
+ sig = pktgen_wait_thread_run(t);
+ if( sig == 0 ) break;
+ thread_lock();
+ t=t->next;
+ thread_unlock();
+ }
+ if(sig == 0) {
+ thread_lock();
+ while (t) {
+ t->control |= (T_STOP);
+ t=t->next;
+ }
+ thread_unlock();
+ }
+ return sig;
+}
+
+static void pktgen_run_all_threads(void)
+{
+ struct pktgen_thread *t = pktgen_threads;
+
+ PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n"));
+
+ thread_lock();
+
+ while(t) {
+ t->control |= (T_RUN);
+ t = t->next;
+ }
+ thread_unlock();
+
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(HZ/8); /* Propagate thread->control */
+
+ pktgen_wait_all_threads_run();
+}
+
+
+static void show_results(struct pktgen_dev *pkt_dev, int nr_frags)
+{
+ __u64 total_us, bps, mbps, pps, idle;
+ char *p = pkt_dev->result;
+
+ total_us = pkt_dev->stopped_at - pkt_dev->started_at;
+
+ idle = pkt_dev->idle_acc;
+
+ p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n",
+ (unsigned long long) total_us,
+ (unsigned long long)(total_us - idle),
+ (unsigned long long) idle,
+ (unsigned long long) pkt_dev->sofar,
+ pkt_dev->cur_pkt_size, nr_frags);
+
+ pps = pkt_dev->sofar * USEC_PER_SEC;
+
+ while ((total_us >> 32) != 0) {
+ pps >>= 1;
+ total_us >>= 1;
+ }
+
+ do_div(pps, total_us);
+
+ bps = pps * 8 * pkt_dev->cur_pkt_size;
+
+ mbps = bps;
+ do_div(mbps, 1000000);
+ p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu",
+ (unsigned long long) pps,
+ (unsigned long long) mbps,
+ (unsigned long long) bps,
+ (unsigned long long) pkt_dev->errors);
+}
+
+
+/* Set stopped-at timer, remove from running list, do counters & statistics */
+
+static int pktgen_stop_device(struct pktgen_dev *pkt_dev)
+{
+
+ if (!pkt_dev->running) {
+ printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname);
+ return -EINVAL;
+ }
+
+ pkt_dev->stopped_at = getCurUs();
+ pkt_dev->running = 0;
+
+ show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags);
+
+ if (pkt_dev->skb)
+ kfree_skb(pkt_dev->skb);
+
+ pkt_dev->skb = NULL;
+
+ return 0;
+}
+
+static struct pktgen_dev *next_to_run(struct pktgen_thread *t )
+{
+ struct pktgen_dev *next, *best = NULL;
+
+ if_lock(t);
+
+ for(next=t->if_list; next ; next=next->next) {
+ if(!next->running) continue;
+ if(best == NULL) best=next;
+ else if ( next->next_tx_us < best->next_tx_us)
+ best = next;
+ }
+ if_unlock(t);
+ return best;
+}
+
+static void pktgen_stop(struct pktgen_thread *t) {
+ struct pktgen_dev *next = NULL;
+
+ PG_DEBUG(printk("pktgen: entering pktgen_stop.\n"));
+
+ if_lock(t);
+
+ for(next=t->if_list; next; next=next->next)
+ pktgen_stop_device(next);
+
+ if_unlock(t);
+}
+
+static void pktgen_rem_all_ifs(struct pktgen_thread *t)
+{
+ struct pktgen_dev *cur, *next = NULL;
+
+ /* Remove all devices, free mem */
+
+ if_lock(t);
+
+ for(cur=t->if_list; cur; cur=next) {
+ next = cur->next;
+ pktgen_remove_device(t, cur);
+ }
+
+ if_unlock(t);
+}
+
+static void pktgen_rem_thread(struct pktgen_thread *t)
+{
+ /* Remove from the thread list */
+
+ struct pktgen_thread *tmp = pktgen_threads;
+
+ if (strlen(t->fname))
+ remove_proc_entry(t->fname, NULL);
+
+ thread_lock();
+
+ if (tmp == t)
+ pktgen_threads = tmp->next;
+ else {
+ while (tmp) {
+ if (tmp->next == t) {
+ tmp->next = t->next;
+ t->next = NULL;
+ break;
+ }
+ tmp = tmp->next;
+ }
+ }
+ thread_unlock();
+}
+
+static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev)
+{
+ struct net_device *odev = NULL;
+ __u64 idle_start = 0;
+ int ret;
+
+ odev = pkt_dev->odev;
+
+ if (pkt_dev->delay_us || pkt_dev->delay_ns) {
+ u64 now;
+
+ now = getCurUs();
+ if (now < pkt_dev->next_tx_us)
+ spin(pkt_dev, pkt_dev->next_tx_us);
+
+ /* This is max DELAY, this has special meaning of
+ * "never transmit"
+ */
+ if (pkt_dev->delay_us == 0x7FFFFFFF) {
+ pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us;
+ pkt_dev->next_tx_ns = pkt_dev->delay_ns;
+ goto out;
+ }
+ }
+
+ if (netif_queue_stopped(odev) || need_resched()) {
+ idle_start = getCurUs();
+
+ if (!netif_running(odev)) {
+ pktgen_stop_device(pkt_dev);
+ goto out;
+ }
+ if (need_resched())
+ schedule();
+
+ pkt_dev->idle_acc += getCurUs() - idle_start;
+
+ if (netif_queue_stopped(odev)) {
+ pkt_dev->next_tx_us = getCurUs(); /* TODO */
+ pkt_dev->next_tx_ns = 0;
+ goto out; /* Try the next interface */
+ }
+ }
+
+ if (pkt_dev->last_ok || !pkt_dev->skb) {
+ if ((++pkt_dev->clone_count >= pkt_dev->clone_skb ) || (!pkt_dev->skb)) {
+ /* build a new pkt */
+ if (pkt_dev->skb)
+ kfree_skb(pkt_dev->skb);
+
+ pkt_dev->skb = fill_packet(odev, pkt_dev);
+ if (pkt_dev->skb == NULL) {
+ printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n");
+ schedule();
+ pkt_dev->clone_count--; /* back out increment, OOM */
+ goto out;
+ }
+ pkt_dev->allocated_skbs++;
+ pkt_dev->clone_count = 0; /* reset counter */
+ }
+ }
+
+ spin_lock_bh(&odev->xmit_lock);
+ if (!netif_queue_stopped(odev)) {
+
+ atomic_inc(&(pkt_dev->skb->users));
+retry_now:
+ ret = odev->hard_start_xmit(pkt_dev->skb, odev);
+ if (likely(ret == NETDEV_TX_OK)) {
+ pkt_dev->last_ok = 1;
+ pkt_dev->sofar++;
+ pkt_dev->seq_num++;
+ pkt_dev->tx_bytes += pkt_dev->cur_pkt_size;
+
+ } else if (ret == NETDEV_TX_LOCKED
+ && (odev->features & NETIF_F_LLTX)) {
+ cpu_relax();
+ goto retry_now;
+ } else { /* Retry it next time */
+
+ atomic_dec(&(pkt_dev->skb->users));
+
+ if (debug && net_ratelimit())
+ printk(KERN_INFO "pktgen: Hard xmit error\n");
+
+ pkt_dev->errors++;
+ pkt_dev->last_ok = 0;
+ }
+
+ pkt_dev->next_tx_us = getCurUs();
+ pkt_dev->next_tx_ns = 0;
+
+ pkt_dev->next_tx_us += pkt_dev->delay_us;
+ pkt_dev->next_tx_ns += pkt_dev->delay_ns;
+
+ if (pkt_dev->next_tx_ns > 1000) {
+ pkt_dev->next_tx_us++;
+ pkt_dev->next_tx_ns -= 1000;
+ }
+ }
+
+ else { /* Retry it next time */
+ pkt_dev->last_ok = 0;
+ pkt_dev->next_tx_us = getCurUs(); /* TODO */
+ pkt_dev->next_tx_ns = 0;
+ }
+
+ spin_unlock_bh(&odev->xmit_lock);
+
+ /* If pkt_dev->count is zero, then run forever */
+ if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) {
+ if (atomic_read(&(pkt_dev->skb->users)) != 1) {
+ idle_start = getCurUs();
+ while (atomic_read(&(pkt_dev->skb->users)) != 1) {
+ if (signal_pending(current)) {
+ break;
+ }
+ schedule();
+ }
+ pkt_dev->idle_acc += getCurUs() - idle_start;
+ }
+
+ /* Done with this */
+ pktgen_stop_device(pkt_dev);
+ }
+ out:;
+ }
+
+/*
+ * Main loop of the thread goes here
+ */
+
+static void pktgen_thread_worker(struct pktgen_thread *t)
+{
+ DEFINE_WAIT(wait);
+ struct pktgen_dev *pkt_dev = NULL;
+ int cpu = t->cpu;
+ sigset_t tmpsig;
+ u32 max_before_softirq;
+ u32 tx_since_softirq = 0;
+
+ daemonize("pktgen/%d", cpu);
+
+ /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */
+
+ spin_lock_irq(¤t->sighand->siglock);
+ tmpsig = current->blocked;
+ siginitsetinv(¤t->blocked,
+ sigmask(SIGKILL) |
+ sigmask(SIGSTOP)|
+ sigmask(SIGTERM));
+
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
+
+ /* Migrate to the right CPU */
+ set_cpus_allowed(current, cpumask_of_cpu(cpu));
+ if (smp_processor_id() != cpu)
+ BUG();
+
+ init_waitqueue_head(&t->queue);
+
+ t->control &= ~(T_TERMINATE);
+ t->control &= ~(T_RUN);
+ t->control &= ~(T_STOP);
+ t->control &= ~(T_REMDEV);
+
+ t->pid = current->pid;
+
+ PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid));
+
+ max_before_softirq = t->max_before_softirq;
+
+ __set_current_state(TASK_INTERRUPTIBLE);
+ mb();
+
+ while (1) {
+
+ __set_current_state(TASK_RUNNING);
+
+ /*
+ * Get next dev to xmit -- if any.
+ */
+
+ pkt_dev = next_to_run(t);
+
+ if (pkt_dev) {
+
+ pktgen_xmit(pkt_dev);
+
+ /*
+ * We like to stay RUNNING but must also give
+ * others fair share.
+ */
+
+ tx_since_softirq += pkt_dev->last_ok;
+
+ if (tx_since_softirq > max_before_softirq) {
+ if (local_softirq_pending())
+ do_softirq();
+ tx_since_softirq = 0;
+ }
+ } else {
+ prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE);
+ schedule_timeout(HZ/10);
+ finish_wait(&(t->queue), &wait);
+ }
+
+ /*
+ * Back from sleep, either due to the timeout or signal.
+ * We check if we have any "posted" work for us.
+ */
+
+ if (t->control & T_TERMINATE || signal_pending(current))
+ /* we received a request to terminate ourself */
+ break;
+
+
+ if(t->control & T_STOP) {
+ pktgen_stop(t);
+ t->control &= ~(T_STOP);
+ }
+
+ if(t->control & T_RUN) {
+ pktgen_run(t);
+ t->control &= ~(T_RUN);
+ }
+
+ if(t->control & T_REMDEV) {
+ pktgen_rem_all_ifs(t);
+ t->control &= ~(T_REMDEV);
+ }
+
+ if (need_resched())
+ schedule();
+ }
+
+ PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name));
+ pktgen_stop(t);
+
+ PG_DEBUG(printk("pktgen: %s removing all device\n", t->name));
+ pktgen_rem_all_ifs(t);
+
+ PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name));
+ pktgen_rem_thread(t);
+}
+
+static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* ifname)
+{
+ struct pktgen_dev *pkt_dev = NULL;
+ if_lock(t);
+
+ for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) {
+ if (strcmp(pkt_dev->ifname, ifname) == 0) {
+ break;
+ }
+ }
+
+ if_unlock(t);
+ PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname,pkt_dev));
+ return pkt_dev;
+}
+
+/*
+ * Adds a dev at front of if_list.
+ */
+
+static int add_dev_to_thread(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
+{
+ int rv = 0;
+
+ if_lock(t);
+
+ if (pkt_dev->pg_thread) {
+ printk("pktgen: ERROR: already assigned to a thread.\n");
+ rv = -EBUSY;
+ goto out;
+ }
+ pkt_dev->next =t->if_list; t->if_list=pkt_dev;
+ pkt_dev->pg_thread = t;
+ pkt_dev->running = 0;
+
+ out:
+ if_unlock(t);
+ return rv;
+}
+
+/* Called under thread lock */
+
+static int pktgen_add_device(struct pktgen_thread *t, const char* ifname)
+{
+ struct pktgen_dev *pkt_dev;
+
+ /* We don't allow a device to be on several threads */
+
+ if( (pkt_dev = __pktgen_NN_threads(ifname, FIND)) == NULL) {
+
+ pkt_dev = kmalloc(sizeof(struct pktgen_dev), GFP_KERNEL);
+ if (!pkt_dev)
+ return -ENOMEM;
+
+ memset(pkt_dev, 0, sizeof(struct pktgen_dev));
+
+ pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state));
+ if (pkt_dev->flows == NULL) {
+ kfree(pkt_dev);
+ return -ENOMEM;
+ }
+ memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state));
+
+ pkt_dev->min_pkt_size = ETH_ZLEN;
+ pkt_dev->max_pkt_size = ETH_ZLEN;
+ pkt_dev->nfrags = 0;
+ pkt_dev->clone_skb = pg_clone_skb_d;
+ pkt_dev->delay_us = pg_delay_d / 1000;
+ pkt_dev->delay_ns = pg_delay_d % 1000;
+ pkt_dev->count = pg_count_d;
+ pkt_dev->sofar = 0;
+ pkt_dev->udp_src_min = 9; /* sink port */
+ pkt_dev->udp_src_max = 9;
+ pkt_dev->udp_dst_min = 9;
+ pkt_dev->udp_dst_max = 9;
+
+ strncpy(pkt_dev->ifname, ifname, 31);
+ sprintf(pkt_dev->fname, "net/%s/%s", PG_PROC_DIR, ifname);
+
+ if (! pktgen_setup_dev(pkt_dev)) {
+ printk("pktgen: ERROR: pktgen_setup_dev failed.\n");
+ if (pkt_dev->flows)
+ vfree(pkt_dev->flows);
+ kfree(pkt_dev);
+ return -ENODEV;
+ }
+
+ pkt_dev->proc_ent = create_proc_entry(pkt_dev->fname, 0600, NULL);
+ if (!pkt_dev->proc_ent) {
+ printk("pktgen: cannot create %s procfs entry.\n", pkt_dev->fname);
+ if (pkt_dev->flows)
+ vfree(pkt_dev->flows);
+ kfree(pkt_dev);
+ return -EINVAL;
+ }
+ pkt_dev->proc_ent->read_proc = proc_if_read;
+ pkt_dev->proc_ent->write_proc = proc_if_write;
+ pkt_dev->proc_ent->data = (void*)(pkt_dev);
+ pkt_dev->proc_ent->owner = THIS_MODULE;
+
+ return add_dev_to_thread(t, pkt_dev);
+ }
+ else {
+ printk("pktgen: ERROR: interface already used.\n");
+ return -EBUSY;
+ }
+}
+
+static struct pktgen_thread *pktgen_find_thread(const char* name)
+{
+ struct pktgen_thread *t = NULL;
+
+ thread_lock();
+
+ t = pktgen_threads;
+ while (t) {
+ if (strcmp(t->name, name) == 0)
+ break;
+
+ t = t->next;
+ }
+ thread_unlock();
+ return t;
+}
+
+static int pktgen_create_thread(const char* name, int cpu)
+{
+ struct pktgen_thread *t = NULL;
+
+ if (strlen(name) > 31) {
+ printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n");
+ return -EINVAL;
+ }
+
+ if (pktgen_find_thread(name)) {
+ printk("pktgen: ERROR: thread: %s already exists\n", name);
+ return -EINVAL;
+ }
+
+ t = (struct pktgen_thread*)(kmalloc(sizeof(struct pktgen_thread), GFP_KERNEL));
+ if (!t) {
+ printk("pktgen: ERROR: out of memory, can't create new thread.\n");
+ return -ENOMEM;
+ }
+
+ memset(t, 0, sizeof(struct pktgen_thread));
+ strcpy(t->name, name);
+ spin_lock_init(&t->if_lock);
+ t->cpu = cpu;
+
+ sprintf(t->fname, "net/%s/%s", PG_PROC_DIR, t->name);
+ t->proc_ent = create_proc_entry(t->fname, 0600, NULL);
+ if (!t->proc_ent) {
+ printk("pktgen: cannot create %s procfs entry.\n", t->fname);
+ kfree(t);
+ return -EINVAL;
+ }
+ t->proc_ent->read_proc = proc_thread_read;
+ t->proc_ent->write_proc = proc_thread_write;
+ t->proc_ent->data = (void*)(t);
+ t->proc_ent->owner = THIS_MODULE;
+
+ t->next = pktgen_threads;
+ pktgen_threads = t;
+
+ if (kernel_thread((void *) pktgen_thread_worker, (void *) t,
+ CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0)
+ printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu);
+
+ return 0;
+}
+
+/*
+ * Removes a device from the thread if_list.
+ */
+static void _rem_dev_from_if_list(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
+{
+ struct pktgen_dev *i, *prev = NULL;
+
+ i = t->if_list;
+
+ while(i) {
+ if(i == pkt_dev) {
+ if(prev) prev->next = i->next;
+ else t->if_list = NULL;
+ break;
+ }
+ prev = i;
+ i=i->next;
+ }
+}
+
+static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_dev)
+{
+
+ PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev));
+
+ if (pkt_dev->running) {
+ printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n");
+ pktgen_stop_device(pkt_dev);
+ }
+
+ /* Dis-associate from the interface */
+
+ if (pkt_dev->odev) {
+ dev_put(pkt_dev->odev);
+ pkt_dev->odev = NULL;
+ }
+
+ /* And update the thread if_list */
+
+ _rem_dev_from_if_list(t, pkt_dev);
+
+ /* Clean up proc file system */
+
+ if (strlen(pkt_dev->fname))
+ remove_proc_entry(pkt_dev->fname, NULL);
+
+ if (pkt_dev->flows)
+ vfree(pkt_dev->flows);
+ kfree(pkt_dev);
+ return 0;
+}
+
+static int __init pg_init(void)
+{
+ int cpu;
+ printk(version);
+
+ module_fname[0] = 0;
+
+ create_proc_dir();
+
+ sprintf(module_fname, "net/%s/pgctrl", PG_PROC_DIR);
+ module_proc_ent = create_proc_entry(module_fname, 0600, NULL);
+ if (!module_proc_ent) {
+ printk("pktgen: ERROR: cannot create %s procfs entry.\n", module_fname);
+ return -EINVAL;
+ }
+
+ module_proc_ent->proc_fops = &pktgen_fops;
+ module_proc_ent->data = NULL;
+
+ /* Register us to receive netdevice events */
+ register_netdevice_notifier(&pktgen_notifier_block);
+
+ for (cpu = 0; cpu < NR_CPUS ; cpu++) {
+ char buf[30];
+
+ if (!cpu_online(cpu))
+ continue;
+
+ sprintf(buf, "kpktgend_%i", cpu);
+ pktgen_create_thread(buf, cpu);
+ }
+ return 0;
+}
+
+static void __exit pg_cleanup(void)
+{
+ wait_queue_head_t queue;
+ init_waitqueue_head(&queue);
+
+ /* Stop all interfaces & threads */
+
+ while (pktgen_threads) {
+ struct pktgen_thread *t = pktgen_threads;
+ pktgen_threads->control |= (T_TERMINATE);
+
+ wait_event_interruptible_timeout(queue, (t != pktgen_threads), HZ);
+ }
+
+ /* Un-register us from receiving netdevice events */
+ unregister_netdevice_notifier(&pktgen_notifier_block);
+
+ /* Clean up proc file system */
+
+ remove_proc_entry(module_fname, NULL);
+
+ remove_proc_dir();
+}
+
+
+module_init(pg_init);
+module_exit(pg_cleanup);
+
+MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se");
+MODULE_DESCRIPTION("Packet Generator tool");
+MODULE_LICENSE("GPL");
+module_param(pg_count_d, int, 0);
+module_param(pg_delay_d, int, 0);
+module_param(pg_clone_skb_d, int, 0);
+module_param(debug, int, 0);
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
new file mode 100644
index 0000000..d69ad90
--- /dev/null
+++ b/net/core/rtnetlink.c
@@ -0,0 +1,711 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Routing netlink socket interface: protocol independent part.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Fixes:
+ * Vitaly E. Lavrov RTA_OK arithmetics was wrong.
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/capability.h>
+#include <linux/skbuff.h>
+#include <linux/init.h>
+#include <linux/security.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/string.h>
+
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <net/ip.h>
+#include <net/protocol.h>
+#include <net/arp.h>
+#include <net/route.h>
+#include <net/udp.h>
+#include <net/sock.h>
+#include <net/pkt_sched.h>
+
+DECLARE_MUTEX(rtnl_sem);
+
+void rtnl_lock(void)
+{
+ rtnl_shlock();
+}
+
+int rtnl_lock_interruptible(void)
+{
+ return down_interruptible(&rtnl_sem);
+}
+
+void rtnl_unlock(void)
+{
+ rtnl_shunlock();
+
+ netdev_run_todo();
+}
+
+int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len)
+{
+ memset(tb, 0, sizeof(struct rtattr*)*maxattr);
+
+ while (RTA_OK(rta, len)) {
+ unsigned flavor = rta->rta_type;
+ if (flavor && flavor <= maxattr)
+ tb[flavor-1] = rta;
+ rta = RTA_NEXT(rta, len);
+ }
+ return 0;
+}
+
+struct sock *rtnl;
+
+struct rtnetlink_link * rtnetlink_links[NPROTO];
+
+static const int rtm_min[(RTM_MAX+1-RTM_BASE)/4] =
+{
+ NLMSG_LENGTH(sizeof(struct ifinfomsg)),
+ NLMSG_LENGTH(sizeof(struct ifaddrmsg)),
+ NLMSG_LENGTH(sizeof(struct rtmsg)),
+ NLMSG_LENGTH(sizeof(struct ndmsg)),
+ NLMSG_LENGTH(sizeof(struct rtmsg)),
+ NLMSG_LENGTH(sizeof(struct tcmsg)),
+ NLMSG_LENGTH(sizeof(struct tcmsg)),
+ NLMSG_LENGTH(sizeof(struct tcmsg)),
+ NLMSG_LENGTH(sizeof(struct tcamsg))
+};
+
+static const int rta_max[(RTM_MAX+1-RTM_BASE)/4] =
+{
+ IFLA_MAX,
+ IFA_MAX,
+ RTA_MAX,
+ NDA_MAX,
+ RTA_MAX,
+ TCA_MAX,
+ TCA_MAX,
+ TCA_MAX,
+ TCAA_MAX
+};
+
+void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data)
+{
+ struct rtattr *rta;
+ int size = RTA_LENGTH(attrlen);
+
+ rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size));
+ rta->rta_type = attrtype;
+ rta->rta_len = size;
+ memcpy(RTA_DATA(rta), data, attrlen);
+}
+
+size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size)
+{
+ size_t ret = RTA_PAYLOAD(rta);
+ char *src = RTA_DATA(rta);
+
+ if (ret > 0 && src[ret - 1] == '\0')
+ ret--;
+ if (size > 0) {
+ size_t len = (ret >= size) ? size - 1 : ret;
+ memset(dest, 0, size);
+ memcpy(dest, src, len);
+ }
+ return ret;
+}
+
+int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo)
+{
+ int err = 0;
+
+ NETLINK_CB(skb).dst_groups = group;
+ if (echo)
+ atomic_inc(&skb->users);
+ netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL);
+ if (echo)
+ err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
+ return err;
+}
+
+int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics)
+{
+ struct rtattr *mx = (struct rtattr*)skb->tail;
+ int i;
+
+ RTA_PUT(skb, RTA_METRICS, 0, NULL);
+ for (i=0; i<RTAX_MAX; i++) {
+ if (metrics[i])
+ RTA_PUT(skb, i+1, sizeof(u32), metrics+i);
+ }
+ mx->rta_len = skb->tail - (u8*)mx;
+ if (mx->rta_len == RTA_LENGTH(0))
+ skb_trim(skb, (u8*)mx - skb->data);
+ return 0;
+
+rtattr_failure:
+ skb_trim(skb, (u8*)mx - skb->data);
+ return -1;
+}
+
+
+static int rtnetlink_fill_ifinfo(struct sk_buff *skb, struct net_device *dev,
+ int type, u32 pid, u32 seq, u32 change)
+{
+ struct ifinfomsg *r;
+ struct nlmsghdr *nlh;
+ unsigned char *b = skb->tail;
+
+ nlh = NLMSG_PUT(skb, pid, seq, type, sizeof(*r));
+ if (pid) nlh->nlmsg_flags |= NLM_F_MULTI;
+ r = NLMSG_DATA(nlh);
+ r->ifi_family = AF_UNSPEC;
+ r->ifi_type = dev->type;
+ r->ifi_index = dev->ifindex;
+ r->ifi_flags = dev_get_flags(dev);
+ r->ifi_change = change;
+
+ RTA_PUT(skb, IFLA_IFNAME, strlen(dev->name)+1, dev->name);
+
+ if (1) {
+ u32 txqlen = dev->tx_queue_len;
+ RTA_PUT(skb, IFLA_TXQLEN, sizeof(txqlen), &txqlen);
+ }
+
+ if (1) {
+ u32 weight = dev->weight;
+ RTA_PUT(skb, IFLA_WEIGHT, sizeof(weight), &weight);
+ }
+
+ if (1) {
+ struct rtnl_link_ifmap map = {
+ .mem_start = dev->mem_start,
+ .mem_end = dev->mem_end,
+ .base_addr = dev->base_addr,
+ .irq = dev->irq,
+ .dma = dev->dma,
+ .port = dev->if_port,
+ };
+ RTA_PUT(skb, IFLA_MAP, sizeof(map), &map);
+ }
+
+ if (dev->addr_len) {
+ RTA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
+ RTA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast);
+ }
+
+ if (1) {
+ u32 mtu = dev->mtu;
+ RTA_PUT(skb, IFLA_MTU, sizeof(mtu), &mtu);
+ }
+
+ if (dev->ifindex != dev->iflink) {
+ u32 iflink = dev->iflink;
+ RTA_PUT(skb, IFLA_LINK, sizeof(iflink), &iflink);
+ }
+
+ if (dev->qdisc_sleeping)
+ RTA_PUT(skb, IFLA_QDISC,
+ strlen(dev->qdisc_sleeping->ops->id) + 1,
+ dev->qdisc_sleeping->ops->id);
+
+ if (dev->master) {
+ u32 master = dev->master->ifindex;
+ RTA_PUT(skb, IFLA_MASTER, sizeof(master), &master);
+ }
+
+ if (dev->get_stats) {
+ unsigned long *stats = (unsigned long*)dev->get_stats(dev);
+ if (stats) {
+ struct rtattr *a;
+ __u32 *s;
+ int i;
+ int n = sizeof(struct rtnl_link_stats)/4;
+
+ a = __RTA_PUT(skb, IFLA_STATS, n*4);
+ s = RTA_DATA(a);
+ for (i=0; i<n; i++)
+ s[i] = stats[i];
+ }
+ }
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+static int rtnetlink_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int idx;
+ int s_idx = cb->args[0];
+ struct net_device *dev;
+
+ read_lock(&dev_base_lock);
+ for (dev=dev_base, idx=0; dev; dev = dev->next, idx++) {
+ if (idx < s_idx)
+ continue;
+ if (rtnetlink_fill_ifinfo(skb, dev, RTM_NEWLINK, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, 0) <= 0)
+ break;
+ }
+ read_unlock(&dev_base_lock);
+ cb->args[0] = idx;
+
+ return skb->len;
+}
+
+static int do_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct ifinfomsg *ifm = NLMSG_DATA(nlh);
+ struct rtattr **ida = arg;
+ struct net_device *dev;
+ int err, send_addr_notify = 0;
+
+ if (ifm->ifi_index >= 0)
+ dev = dev_get_by_index(ifm->ifi_index);
+ else if (ida[IFLA_IFNAME - 1]) {
+ char ifname[IFNAMSIZ];
+
+ if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
+ IFNAMSIZ) >= IFNAMSIZ)
+ return -EINVAL;
+ dev = dev_get_by_name(ifname);
+ } else
+ return -EINVAL;
+
+ if (!dev)
+ return -ENODEV;
+
+ err = -EINVAL;
+
+ if (ifm->ifi_flags)
+ dev_change_flags(dev, ifm->ifi_flags);
+
+ if (ida[IFLA_MAP - 1]) {
+ struct rtnl_link_ifmap *u_map;
+ struct ifmap k_map;
+
+ if (!dev->set_config) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (!netif_device_present(dev)) {
+ err = -ENODEV;
+ goto out;
+ }
+
+ if (ida[IFLA_MAP - 1]->rta_len != RTA_LENGTH(sizeof(*u_map)))
+ goto out;
+
+ u_map = RTA_DATA(ida[IFLA_MAP - 1]);
+
+ k_map.mem_start = (unsigned long) u_map->mem_start;
+ k_map.mem_end = (unsigned long) u_map->mem_end;
+ k_map.base_addr = (unsigned short) u_map->base_addr;
+ k_map.irq = (unsigned char) u_map->irq;
+ k_map.dma = (unsigned char) u_map->dma;
+ k_map.port = (unsigned char) u_map->port;
+
+ err = dev->set_config(dev, &k_map);
+
+ if (err)
+ goto out;
+ }
+
+ if (ida[IFLA_ADDRESS - 1]) {
+ if (!dev->set_mac_address) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+ if (!netif_device_present(dev)) {
+ err = -ENODEV;
+ goto out;
+ }
+ if (ida[IFLA_ADDRESS - 1]->rta_len != RTA_LENGTH(dev->addr_len))
+ goto out;
+
+ err = dev->set_mac_address(dev, RTA_DATA(ida[IFLA_ADDRESS - 1]));
+ if (err)
+ goto out;
+ send_addr_notify = 1;
+ }
+
+ if (ida[IFLA_BROADCAST - 1]) {
+ if (ida[IFLA_BROADCAST - 1]->rta_len != RTA_LENGTH(dev->addr_len))
+ goto out;
+ memcpy(dev->broadcast, RTA_DATA(ida[IFLA_BROADCAST - 1]),
+ dev->addr_len);
+ send_addr_notify = 1;
+ }
+
+ if (ida[IFLA_MTU - 1]) {
+ if (ida[IFLA_MTU - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
+ goto out;
+ err = dev_set_mtu(dev, *((u32 *) RTA_DATA(ida[IFLA_MTU - 1])));
+
+ if (err)
+ goto out;
+
+ }
+
+ if (ida[IFLA_TXQLEN - 1]) {
+ if (ida[IFLA_TXQLEN - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
+ goto out;
+
+ dev->tx_queue_len = *((u32 *) RTA_DATA(ida[IFLA_TXQLEN - 1]));
+ }
+
+ if (ida[IFLA_WEIGHT - 1]) {
+ if (ida[IFLA_WEIGHT - 1]->rta_len != RTA_LENGTH(sizeof(u32)))
+ goto out;
+
+ dev->weight = *((u32 *) RTA_DATA(ida[IFLA_WEIGHT - 1]));
+ }
+
+ if (ifm->ifi_index >= 0 && ida[IFLA_IFNAME - 1]) {
+ char ifname[IFNAMSIZ];
+
+ if (rtattr_strlcpy(ifname, ida[IFLA_IFNAME - 1],
+ IFNAMSIZ) >= IFNAMSIZ)
+ goto out;
+ err = dev_change_name(dev, ifname);
+ if (err)
+ goto out;
+ }
+
+ err = 0;
+
+out:
+ if (send_addr_notify)
+ call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
+
+ dev_put(dev);
+ return err;
+}
+
+static int rtnetlink_dump_all(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ int idx;
+ int s_idx = cb->family;
+
+ if (s_idx == 0)
+ s_idx = 1;
+ for (idx=1; idx<NPROTO; idx++) {
+ int type = cb->nlh->nlmsg_type-RTM_BASE;
+ if (idx < s_idx || idx == PF_PACKET)
+ continue;
+ if (rtnetlink_links[idx] == NULL ||
+ rtnetlink_links[idx][type].dumpit == NULL)
+ continue;
+ if (idx > s_idx)
+ memset(&cb->args[0], 0, sizeof(cb->args));
+ if (rtnetlink_links[idx][type].dumpit(skb, cb))
+ break;
+ }
+ cb->family = idx;
+
+ return skb->len;
+}
+
+void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change)
+{
+ struct sk_buff *skb;
+ int size = NLMSG_SPACE(sizeof(struct ifinfomsg) +
+ sizeof(struct rtnl_link_ifmap) +
+ sizeof(struct rtnl_link_stats) + 128);
+
+ skb = alloc_skb(size, GFP_KERNEL);
+ if (!skb)
+ return;
+
+ if (rtnetlink_fill_ifinfo(skb, dev, type, 0, 0, change) < 0) {
+ kfree_skb(skb);
+ return;
+ }
+ NETLINK_CB(skb).dst_groups = RTMGRP_LINK;
+ netlink_broadcast(rtnl, skb, 0, RTMGRP_LINK, GFP_KERNEL);
+}
+
+static int rtnetlink_done(struct netlink_callback *cb)
+{
+ return 0;
+}
+
+/* Protected by RTNL sempahore. */
+static struct rtattr **rta_buf;
+static int rtattr_max;
+
+/* Process one rtnetlink message. */
+
+static __inline__ int
+rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
+{
+ struct rtnetlink_link *link;
+ struct rtnetlink_link *link_tab;
+ int sz_idx, kind;
+ int min_len;
+ int family;
+ int type;
+ int err;
+
+ /* Only requests are handled by kernel now */
+ if (!(nlh->nlmsg_flags&NLM_F_REQUEST))
+ return 0;
+
+ type = nlh->nlmsg_type;
+
+ /* A control message: ignore them */
+ if (type < RTM_BASE)
+ return 0;
+
+ /* Unknown message: reply with EINVAL */
+ if (type > RTM_MAX)
+ goto err_inval;
+
+ type -= RTM_BASE;
+
+ /* All the messages must have at least 1 byte length */
+ if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg)))
+ return 0;
+
+ family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family;
+ if (family >= NPROTO) {
+ *errp = -EAFNOSUPPORT;
+ return -1;
+ }
+
+ link_tab = rtnetlink_links[family];
+ if (link_tab == NULL)
+ link_tab = rtnetlink_links[PF_UNSPEC];
+ link = &link_tab[type];
+
+ sz_idx = type>>2;
+ kind = type&3;
+
+ if (kind != 2 && security_netlink_recv(skb)) {
+ *errp = -EPERM;
+ return -1;
+ }
+
+ if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) {
+ u32 rlen;
+
+ if (link->dumpit == NULL)
+ link = &(rtnetlink_links[PF_UNSPEC][type]);
+
+ if (link->dumpit == NULL)
+ goto err_inval;
+
+ if ((*errp = netlink_dump_start(rtnl, skb, nlh,
+ link->dumpit,
+ rtnetlink_done)) != 0) {
+ return -1;
+ }
+ rlen = NLMSG_ALIGN(nlh->nlmsg_len);
+ if (rlen > skb->len)
+ rlen = skb->len;
+ skb_pull(skb, rlen);
+ return -1;
+ }
+
+ memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *)));
+
+ min_len = rtm_min[sz_idx];
+ if (nlh->nlmsg_len < min_len)
+ goto err_inval;
+
+ if (nlh->nlmsg_len > min_len) {
+ int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len);
+ struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len);
+
+ while (RTA_OK(attr, attrlen)) {
+ unsigned flavor = attr->rta_type;
+ if (flavor) {
+ if (flavor > rta_max[sz_idx])
+ goto err_inval;
+ rta_buf[flavor-1] = attr;
+ }
+ attr = RTA_NEXT(attr, attrlen);
+ }
+ }
+
+ if (link->doit == NULL)
+ link = &(rtnetlink_links[PF_UNSPEC][type]);
+ if (link->doit == NULL)
+ goto err_inval;
+ err = link->doit(skb, nlh, (void *)&rta_buf[0]);
+
+ *errp = err;
+ return err;
+
+err_inval:
+ *errp = -EINVAL;
+ return -1;
+}
+
+/*
+ * Process one packet of messages.
+ * Malformed skbs with wrong lengths of messages are discarded silently.
+ */
+
+static inline int rtnetlink_rcv_skb(struct sk_buff *skb)
+{
+ int err;
+ struct nlmsghdr * nlh;
+
+ while (skb->len >= NLMSG_SPACE(0)) {
+ u32 rlen;
+
+ nlh = (struct nlmsghdr *)skb->data;
+ if (nlh->nlmsg_len < sizeof(*nlh) || skb->len < nlh->nlmsg_len)
+ return 0;
+ rlen = NLMSG_ALIGN(nlh->nlmsg_len);
+ if (rlen > skb->len)
+ rlen = skb->len;
+ if (rtnetlink_rcv_msg(skb, nlh, &err)) {
+ /* Not error, but we must interrupt processing here:
+ * Note, that in this case we do not pull message
+ * from skb, it will be processed later.
+ */
+ if (err == 0)
+ return -1;
+ netlink_ack(skb, nlh, err);
+ } else if (nlh->nlmsg_flags&NLM_F_ACK)
+ netlink_ack(skb, nlh, 0);
+ skb_pull(skb, rlen);
+ }
+
+ return 0;
+}
+
+/*
+ * rtnetlink input queue processing routine:
+ * - try to acquire shared lock. If it is failed, defer processing.
+ * - feed skbs to rtnetlink_rcv_skb, until it refuse a message,
+ * that will occur, when a dump started and/or acquisition of
+ * exclusive lock failed.
+ */
+
+static void rtnetlink_rcv(struct sock *sk, int len)
+{
+ do {
+ struct sk_buff *skb;
+
+ if (rtnl_shlock_nowait())
+ return;
+
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ if (rtnetlink_rcv_skb(skb)) {
+ if (skb->len)
+ skb_queue_head(&sk->sk_receive_queue,
+ skb);
+ else
+ kfree_skb(skb);
+ break;
+ }
+ kfree_skb(skb);
+ }
+
+ up(&rtnl_sem);
+
+ netdev_run_todo();
+ } while (rtnl && rtnl->sk_receive_queue.qlen);
+}
+
+static struct rtnetlink_link link_rtnetlink_table[RTM_MAX-RTM_BASE+1] =
+{
+ [RTM_GETLINK - RTM_BASE] = { .dumpit = rtnetlink_dump_ifinfo },
+ [RTM_SETLINK - RTM_BASE] = { .doit = do_setlink },
+ [RTM_GETADDR - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
+ [RTM_GETROUTE - RTM_BASE] = { .dumpit = rtnetlink_dump_all },
+ [RTM_NEWNEIGH - RTM_BASE] = { .doit = neigh_add },
+ [RTM_DELNEIGH - RTM_BASE] = { .doit = neigh_delete },
+ [RTM_GETNEIGH - RTM_BASE] = { .dumpit = neigh_dump_info }
+};
+
+static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr)
+{
+ struct net_device *dev = ptr;
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ rtmsg_ifinfo(RTM_DELLINK, dev, ~0U);
+ break;
+ case NETDEV_REGISTER:
+ rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U);
+ break;
+ case NETDEV_UP:
+ case NETDEV_DOWN:
+ rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING);
+ break;
+ case NETDEV_CHANGE:
+ case NETDEV_GOING_DOWN:
+ break;
+ default:
+ rtmsg_ifinfo(RTM_NEWLINK, dev, 0);
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block rtnetlink_dev_notifier = {
+ .notifier_call = rtnetlink_event,
+};
+
+void __init rtnetlink_init(void)
+{
+ int i;
+
+ rtattr_max = 0;
+ for (i = 0; i < ARRAY_SIZE(rta_max); i++)
+ if (rta_max[i] > rtattr_max)
+ rtattr_max = rta_max[i];
+ rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL);
+ if (!rta_buf)
+ panic("rtnetlink_init: cannot allocate rta_buf\n");
+
+ rtnl = netlink_kernel_create(NETLINK_ROUTE, rtnetlink_rcv);
+ if (rtnl == NULL)
+ panic("rtnetlink_init: cannot initialize rtnetlink\n");
+ netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV);
+ register_netdevice_notifier(&rtnetlink_dev_notifier);
+ rtnetlink_links[PF_UNSPEC] = link_rtnetlink_table;
+ rtnetlink_links[PF_PACKET] = link_rtnetlink_table;
+}
+
+EXPORT_SYMBOL(__rta_fill);
+EXPORT_SYMBOL(rtattr_strlcpy);
+EXPORT_SYMBOL(rtattr_parse);
+EXPORT_SYMBOL(rtnetlink_links);
+EXPORT_SYMBOL(rtnetlink_put_metrics);
+EXPORT_SYMBOL(rtnl);
+EXPORT_SYMBOL(rtnl_lock);
+EXPORT_SYMBOL(rtnl_lock_interruptible);
+EXPORT_SYMBOL(rtnl_sem);
+EXPORT_SYMBOL(rtnl_unlock);
diff --git a/net/core/scm.c b/net/core/scm.c
new file mode 100644
index 0000000..a2ebf30
--- /dev/null
+++ b/net/core/scm.c
@@ -0,0 +1,291 @@
+/* scm.c - Socket level control messages processing.
+ *
+ * Author: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * Alignment and value checking mods by Craig Metz
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/signal.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/stat.h>
+#include <linux/socket.h>
+#include <linux/file.h>
+#include <linux/fcntl.h>
+#include <linux/net.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/security.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#include <net/protocol.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/compat.h>
+#include <net/scm.h>
+
+
+/*
+ * Only allow a user to send credentials, that they could set with
+ * setu(g)id.
+ */
+
+static __inline__ int scm_check_creds(struct ucred *creds)
+{
+ if ((creds->pid == current->tgid || capable(CAP_SYS_ADMIN)) &&
+ ((creds->uid == current->uid || creds->uid == current->euid ||
+ creds->uid == current->suid) || capable(CAP_SETUID)) &&
+ ((creds->gid == current->gid || creds->gid == current->egid ||
+ creds->gid == current->sgid) || capable(CAP_SETGID))) {
+ return 0;
+ }
+ return -EPERM;
+}
+
+static int scm_fp_copy(struct cmsghdr *cmsg, struct scm_fp_list **fplp)
+{
+ int *fdp = (int*)CMSG_DATA(cmsg);
+ struct scm_fp_list *fpl = *fplp;
+ struct file **fpp;
+ int i, num;
+
+ num = (cmsg->cmsg_len - CMSG_ALIGN(sizeof(struct cmsghdr)))/sizeof(int);
+
+ if (num <= 0)
+ return 0;
+
+ if (num > SCM_MAX_FD)
+ return -EINVAL;
+
+ if (!fpl)
+ {
+ fpl = kmalloc(sizeof(struct scm_fp_list), GFP_KERNEL);
+ if (!fpl)
+ return -ENOMEM;
+ *fplp = fpl;
+ fpl->count = 0;
+ }
+ fpp = &fpl->fp[fpl->count];
+
+ if (fpl->count + num > SCM_MAX_FD)
+ return -EINVAL;
+
+ /*
+ * Verify the descriptors and increment the usage count.
+ */
+
+ for (i=0; i< num; i++)
+ {
+ int fd = fdp[i];
+ struct file *file;
+
+ if (fd < 0 || !(file = fget(fd)))
+ return -EBADF;
+ *fpp++ = file;
+ fpl->count++;
+ }
+ return num;
+}
+
+void __scm_destroy(struct scm_cookie *scm)
+{
+ struct scm_fp_list *fpl = scm->fp;
+ int i;
+
+ if (fpl) {
+ scm->fp = NULL;
+ for (i=fpl->count-1; i>=0; i--)
+ fput(fpl->fp[i]);
+ kfree(fpl);
+ }
+}
+
+int __scm_send(struct socket *sock, struct msghdr *msg, struct scm_cookie *p)
+{
+ struct cmsghdr *cmsg;
+ int err;
+
+ for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg))
+ {
+ err = -EINVAL;
+
+ /* Verify that cmsg_len is at least sizeof(struct cmsghdr) */
+ /* The first check was omitted in <= 2.2.5. The reasoning was
+ that parser checks cmsg_len in any case, so that
+ additional check would be work duplication.
+ But if cmsg_level is not SOL_SOCKET, we do not check
+ for too short ancillary data object at all! Oops.
+ OK, let's add it...
+ */
+ if (!CMSG_OK(msg, cmsg))
+ goto error;
+
+ if (cmsg->cmsg_level != SOL_SOCKET)
+ continue;
+
+ switch (cmsg->cmsg_type)
+ {
+ case SCM_RIGHTS:
+ err=scm_fp_copy(cmsg, &p->fp);
+ if (err<0)
+ goto error;
+ break;
+ case SCM_CREDENTIALS:
+ if (cmsg->cmsg_len != CMSG_LEN(sizeof(struct ucred)))
+ goto error;
+ memcpy(&p->creds, CMSG_DATA(cmsg), sizeof(struct ucred));
+ err = scm_check_creds(&p->creds);
+ if (err)
+ goto error;
+ break;
+ default:
+ goto error;
+ }
+ }
+
+ if (p->fp && !p->fp->count)
+ {
+ kfree(p->fp);
+ p->fp = NULL;
+ }
+ return 0;
+
+error:
+ scm_destroy(p);
+ return err;
+}
+
+int put_cmsg(struct msghdr * msg, int level, int type, int len, void *data)
+{
+ struct cmsghdr __user *cm = (struct cmsghdr __user *)msg->msg_control;
+ struct cmsghdr cmhdr;
+ int cmlen = CMSG_LEN(len);
+ int err;
+
+ if (MSG_CMSG_COMPAT & msg->msg_flags)
+ return put_cmsg_compat(msg, level, type, len, data);
+
+ if (cm==NULL || msg->msg_controllen < sizeof(*cm)) {
+ msg->msg_flags |= MSG_CTRUNC;
+ return 0; /* XXX: return error? check spec. */
+ }
+ if (msg->msg_controllen < cmlen) {
+ msg->msg_flags |= MSG_CTRUNC;
+ cmlen = msg->msg_controllen;
+ }
+ cmhdr.cmsg_level = level;
+ cmhdr.cmsg_type = type;
+ cmhdr.cmsg_len = cmlen;
+
+ err = -EFAULT;
+ if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
+ goto out;
+ if (copy_to_user(CMSG_DATA(cm), data, cmlen - sizeof(struct cmsghdr)))
+ goto out;
+ cmlen = CMSG_SPACE(len);
+ msg->msg_control += cmlen;
+ msg->msg_controllen -= cmlen;
+ err = 0;
+out:
+ return err;
+}
+
+void scm_detach_fds(struct msghdr *msg, struct scm_cookie *scm)
+{
+ struct cmsghdr __user *cm = (struct cmsghdr __user*)msg->msg_control;
+
+ int fdmax = 0;
+ int fdnum = scm->fp->count;
+ struct file **fp = scm->fp->fp;
+ int __user *cmfptr;
+ int err = 0, i;
+
+ if (MSG_CMSG_COMPAT & msg->msg_flags) {
+ scm_detach_fds_compat(msg, scm);
+ return;
+ }
+
+ if (msg->msg_controllen > sizeof(struct cmsghdr))
+ fdmax = ((msg->msg_controllen - sizeof(struct cmsghdr))
+ / sizeof(int));
+
+ if (fdnum < fdmax)
+ fdmax = fdnum;
+
+ for (i=0, cmfptr=(int __user *)CMSG_DATA(cm); i<fdmax; i++, cmfptr++)
+ {
+ int new_fd;
+ err = security_file_receive(fp[i]);
+ if (err)
+ break;
+ err = get_unused_fd();
+ if (err < 0)
+ break;
+ new_fd = err;
+ err = put_user(new_fd, cmfptr);
+ if (err) {
+ put_unused_fd(new_fd);
+ break;
+ }
+ /* Bump the usage count and install the file. */
+ get_file(fp[i]);
+ fd_install(new_fd, fp[i]);
+ }
+
+ if (i > 0)
+ {
+ int cmlen = CMSG_LEN(i*sizeof(int));
+ if (!err)
+ err = put_user(SOL_SOCKET, &cm->cmsg_level);
+ if (!err)
+ err = put_user(SCM_RIGHTS, &cm->cmsg_type);
+ if (!err)
+ err = put_user(cmlen, &cm->cmsg_len);
+ if (!err) {
+ cmlen = CMSG_SPACE(i*sizeof(int));
+ msg->msg_control += cmlen;
+ msg->msg_controllen -= cmlen;
+ }
+ }
+ if (i < fdnum || (fdnum && fdmax <= 0))
+ msg->msg_flags |= MSG_CTRUNC;
+
+ /*
+ * All of the files that fit in the message have had their
+ * usage counts incremented, so we just free the list.
+ */
+ __scm_destroy(scm);
+}
+
+struct scm_fp_list *scm_fp_dup(struct scm_fp_list *fpl)
+{
+ struct scm_fp_list *new_fpl;
+ int i;
+
+ if (!fpl)
+ return NULL;
+
+ new_fpl = kmalloc(sizeof(*fpl), GFP_KERNEL);
+ if (new_fpl) {
+ for (i=fpl->count-1; i>=0; i--)
+ get_file(fpl->fp[i]);
+ memcpy(new_fpl, fpl, sizeof(*fpl));
+ }
+ return new_fpl;
+}
+
+EXPORT_SYMBOL(__scm_destroy);
+EXPORT_SYMBOL(__scm_send);
+EXPORT_SYMBOL(put_cmsg);
+EXPORT_SYMBOL(scm_detach_fds);
+EXPORT_SYMBOL(scm_fp_dup);
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
new file mode 100644
index 0000000..bf02ca9
--- /dev/null
+++ b/net/core/skbuff.c
@@ -0,0 +1,1460 @@
+/*
+ * Routines having to do with the 'struct sk_buff' memory handlers.
+ *
+ * Authors: Alan Cox <iiitac@pyr.swan.ac.uk>
+ * Florian La Roche <rzsfl@rz.uni-sb.de>
+ *
+ * Version: $Id: skbuff.c,v 1.90 2001/11/07 05:56:19 davem Exp $
+ *
+ * Fixes:
+ * Alan Cox : Fixed the worst of the load
+ * balancer bugs.
+ * Dave Platt : Interrupt stacking fix.
+ * Richard Kooijman : Timestamp fixes.
+ * Alan Cox : Changed buffer format.
+ * Alan Cox : destructor hook for AF_UNIX etc.
+ * Linus Torvalds : Better skb_clone.
+ * Alan Cox : Added skb_copy.
+ * Alan Cox : Added all the changed routines Linus
+ * only put in the headers
+ * Ray VanTassle : Fixed --skb->lock in free
+ * Alan Cox : skb_copy copy arp field
+ * Andi Kleen : slabified it.
+ * Robert Olsson : Removed skb_head_pool
+ *
+ * NOTE:
+ * The __skb_ routines should be called with interrupts
+ * disabled, or you better be *real* sure that the operation is atomic
+ * with respect to whatever list is being frobbed (e.g. via lock_sock()
+ * or via disabling bottom half handlers, etc).
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+/*
+ * The functions in this file will not compile correctly with gcc 2.4.x
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/in.h>
+#include <linux/inet.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#ifdef CONFIG_NET_CLS_ACT
+#include <net/pkt_sched.h>
+#endif
+#include <linux/string.h>
+#include <linux/skbuff.h>
+#include <linux/cache.h>
+#include <linux/rtnetlink.h>
+#include <linux/init.h>
+#include <linux/highmem.h>
+
+#include <net/protocol.h>
+#include <net/dst.h>
+#include <net/sock.h>
+#include <net/checksum.h>
+#include <net/xfrm.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+static kmem_cache_t *skbuff_head_cache;
+
+/*
+ * Keep out-of-line to prevent kernel bloat.
+ * __builtin_return_address is not used because it is not always
+ * reliable.
+ */
+
+/**
+ * skb_over_panic - private function
+ * @skb: buffer
+ * @sz: size
+ * @here: address
+ *
+ * Out of line support code for skb_put(). Not user callable.
+ */
+void skb_over_panic(struct sk_buff *skb, int sz, void *here)
+{
+ printk(KERN_INFO "skput:over: %p:%d put:%d dev:%s",
+ here, skb->len, sz, skb->dev ? skb->dev->name : "<NULL>");
+ BUG();
+}
+
+/**
+ * skb_under_panic - private function
+ * @skb: buffer
+ * @sz: size
+ * @here: address
+ *
+ * Out of line support code for skb_push(). Not user callable.
+ */
+
+void skb_under_panic(struct sk_buff *skb, int sz, void *here)
+{
+ printk(KERN_INFO "skput:under: %p:%d put:%d dev:%s",
+ here, skb->len, sz, skb->dev ? skb->dev->name : "<NULL>");
+ BUG();
+}
+
+/* Allocate a new skbuff. We do this ourselves so we can fill in a few
+ * 'private' fields and also do memory statistics to find all the
+ * [BEEP] leaks.
+ *
+ */
+
+/**
+ * alloc_skb - allocate a network buffer
+ * @size: size to allocate
+ * @gfp_mask: allocation mask
+ *
+ * Allocate a new &sk_buff. The returned buffer has no headroom and a
+ * tail room of size bytes. The object has a reference count of one.
+ * The return is the buffer. On a failure the return is %NULL.
+ *
+ * Buffers may only be allocated from interrupts using a @gfp_mask of
+ * %GFP_ATOMIC.
+ */
+struct sk_buff *alloc_skb(unsigned int size, int gfp_mask)
+{
+ struct sk_buff *skb;
+ u8 *data;
+
+ /* Get the HEAD */
+ skb = kmem_cache_alloc(skbuff_head_cache,
+ gfp_mask & ~__GFP_DMA);
+ if (!skb)
+ goto out;
+
+ /* Get the DATA. Size must match skb_add_mtu(). */
+ size = SKB_DATA_ALIGN(size);
+ data = kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);
+ if (!data)
+ goto nodata;
+
+ memset(skb, 0, offsetof(struct sk_buff, truesize));
+ skb->truesize = size + sizeof(struct sk_buff);
+ atomic_set(&skb->users, 1);
+ skb->head = data;
+ skb->data = data;
+ skb->tail = data;
+ skb->end = data + size;
+
+ atomic_set(&(skb_shinfo(skb)->dataref), 1);
+ skb_shinfo(skb)->nr_frags = 0;
+ skb_shinfo(skb)->tso_size = 0;
+ skb_shinfo(skb)->tso_segs = 0;
+ skb_shinfo(skb)->frag_list = NULL;
+out:
+ return skb;
+nodata:
+ kmem_cache_free(skbuff_head_cache, skb);
+ skb = NULL;
+ goto out;
+}
+
+/**
+ * alloc_skb_from_cache - allocate a network buffer
+ * @cp: kmem_cache from which to allocate the data area
+ * (object size must be big enough for @size bytes + skb overheads)
+ * @size: size to allocate
+ * @gfp_mask: allocation mask
+ *
+ * Allocate a new &sk_buff. The returned buffer has no headroom and
+ * tail room of size bytes. The object has a reference count of one.
+ * The return is the buffer. On a failure the return is %NULL.
+ *
+ * Buffers may only be allocated from interrupts using a @gfp_mask of
+ * %GFP_ATOMIC.
+ */
+struct sk_buff *alloc_skb_from_cache(kmem_cache_t *cp,
+ unsigned int size, int gfp_mask)
+{
+ struct sk_buff *skb;
+ u8 *data;
+
+ /* Get the HEAD */
+ skb = kmem_cache_alloc(skbuff_head_cache,
+ gfp_mask & ~__GFP_DMA);
+ if (!skb)
+ goto out;
+
+ /* Get the DATA. */
+ size = SKB_DATA_ALIGN(size);
+ data = kmem_cache_alloc(cp, gfp_mask);
+ if (!data)
+ goto nodata;
+
+ memset(skb, 0, offsetof(struct sk_buff, truesize));
+ skb->truesize = size + sizeof(struct sk_buff);
+ atomic_set(&skb->users, 1);
+ skb->head = data;
+ skb->data = data;
+ skb->tail = data;
+ skb->end = data + size;
+
+ atomic_set(&(skb_shinfo(skb)->dataref), 1);
+ skb_shinfo(skb)->nr_frags = 0;
+ skb_shinfo(skb)->tso_size = 0;
+ skb_shinfo(skb)->tso_segs = 0;
+ skb_shinfo(skb)->frag_list = NULL;
+out:
+ return skb;
+nodata:
+ kmem_cache_free(skbuff_head_cache, skb);
+ skb = NULL;
+ goto out;
+}
+
+
+static void skb_drop_fraglist(struct sk_buff *skb)
+{
+ struct sk_buff *list = skb_shinfo(skb)->frag_list;
+
+ skb_shinfo(skb)->frag_list = NULL;
+
+ do {
+ struct sk_buff *this = list;
+ list = list->next;
+ kfree_skb(this);
+ } while (list);
+}
+
+static void skb_clone_fraglist(struct sk_buff *skb)
+{
+ struct sk_buff *list;
+
+ for (list = skb_shinfo(skb)->frag_list; list; list = list->next)
+ skb_get(list);
+}
+
+void skb_release_data(struct sk_buff *skb)
+{
+ if (!skb->cloned ||
+ !atomic_sub_return(skb->nohdr ? (1 << SKB_DATAREF_SHIFT) + 1 : 1,
+ &skb_shinfo(skb)->dataref)) {
+ if (skb_shinfo(skb)->nr_frags) {
+ int i;
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+ put_page(skb_shinfo(skb)->frags[i].page);
+ }
+
+ if (skb_shinfo(skb)->frag_list)
+ skb_drop_fraglist(skb);
+
+ kfree(skb->head);
+ }
+}
+
+/*
+ * Free an skbuff by memory without cleaning the state.
+ */
+void kfree_skbmem(struct sk_buff *skb)
+{
+ skb_release_data(skb);
+ kmem_cache_free(skbuff_head_cache, skb);
+}
+
+/**
+ * __kfree_skb - private function
+ * @skb: buffer
+ *
+ * Free an sk_buff. Release anything attached to the buffer.
+ * Clean the state. This is an internal helper function. Users should
+ * always call kfree_skb
+ */
+
+void __kfree_skb(struct sk_buff *skb)
+{
+ if (skb->list) {
+ printk(KERN_WARNING "Warning: kfree_skb passed an skb still "
+ "on a list (from %p).\n", NET_CALLER(skb));
+ BUG();
+ }
+
+ dst_release(skb->dst);
+#ifdef CONFIG_XFRM
+ secpath_put(skb->sp);
+#endif
+ if(skb->destructor) {
+ if (in_irq())
+ printk(KERN_WARNING "Warning: kfree_skb on "
+ "hard IRQ %p\n", NET_CALLER(skb));
+ skb->destructor(skb);
+ }
+#ifdef CONFIG_NETFILTER
+ nf_conntrack_put(skb->nfct);
+#ifdef CONFIG_BRIDGE_NETFILTER
+ nf_bridge_put(skb->nf_bridge);
+#endif
+#endif
+/* XXX: IS this still necessary? - JHS */
+#ifdef CONFIG_NET_SCHED
+ skb->tc_index = 0;
+#ifdef CONFIG_NET_CLS_ACT
+ skb->tc_verd = 0;
+ skb->tc_classid = 0;
+#endif
+#endif
+
+ kfree_skbmem(skb);
+}
+
+/**
+ * skb_clone - duplicate an sk_buff
+ * @skb: buffer to clone
+ * @gfp_mask: allocation priority
+ *
+ * Duplicate an &sk_buff. The new one is not owned by a socket. Both
+ * copies share the same packet data but not structure. The new
+ * buffer has a reference count of 1. If the allocation fails the
+ * function returns %NULL otherwise the new buffer is returned.
+ *
+ * If this function is called from an interrupt gfp_mask() must be
+ * %GFP_ATOMIC.
+ */
+
+struct sk_buff *skb_clone(struct sk_buff *skb, int gfp_mask)
+{
+ struct sk_buff *n = kmem_cache_alloc(skbuff_head_cache, gfp_mask);
+
+ if (!n)
+ return NULL;
+
+#define C(x) n->x = skb->x
+
+ n->next = n->prev = NULL;
+ n->list = NULL;
+ n->sk = NULL;
+ C(stamp);
+ C(dev);
+ C(real_dev);
+ C(h);
+ C(nh);
+ C(mac);
+ C(dst);
+ dst_clone(skb->dst);
+ C(sp);
+#ifdef CONFIG_INET
+ secpath_get(skb->sp);
+#endif
+ memcpy(n->cb, skb->cb, sizeof(skb->cb));
+ C(len);
+ C(data_len);
+ C(csum);
+ C(local_df);
+ n->cloned = 1;
+ n->nohdr = 0;
+ C(pkt_type);
+ C(ip_summed);
+ C(priority);
+ C(protocol);
+ C(security);
+ n->destructor = NULL;
+#ifdef CONFIG_NETFILTER
+ C(nfmark);
+ C(nfcache);
+ C(nfct);
+ nf_conntrack_get(skb->nfct);
+ C(nfctinfo);
+#ifdef CONFIG_NETFILTER_DEBUG
+ C(nf_debug);
+#endif
+#ifdef CONFIG_BRIDGE_NETFILTER
+ C(nf_bridge);
+ nf_bridge_get(skb->nf_bridge);
+#endif
+#endif /*CONFIG_NETFILTER*/
+#if defined(CONFIG_HIPPI)
+ C(private);
+#endif
+#ifdef CONFIG_NET_SCHED
+ C(tc_index);
+#ifdef CONFIG_NET_CLS_ACT
+ n->tc_verd = SET_TC_VERD(skb->tc_verd,0);
+ n->tc_verd = CLR_TC_OK2MUNGE(skb->tc_verd);
+ n->tc_verd = CLR_TC_MUNGED(skb->tc_verd);
+ C(input_dev);
+ C(tc_classid);
+#endif
+
+#endif
+ C(truesize);
+ atomic_set(&n->users, 1);
+ C(head);
+ C(data);
+ C(tail);
+ C(end);
+
+ atomic_inc(&(skb_shinfo(skb)->dataref));
+ skb->cloned = 1;
+
+ return n;
+}
+
+static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
+{
+ /*
+ * Shift between the two data areas in bytes
+ */
+ unsigned long offset = new->data - old->data;
+
+ new->list = NULL;
+ new->sk = NULL;
+ new->dev = old->dev;
+ new->real_dev = old->real_dev;
+ new->priority = old->priority;
+ new->protocol = old->protocol;
+ new->dst = dst_clone(old->dst);
+#ifdef CONFIG_INET
+ new->sp = secpath_get(old->sp);
+#endif
+ new->h.raw = old->h.raw + offset;
+ new->nh.raw = old->nh.raw + offset;
+ new->mac.raw = old->mac.raw + offset;
+ memcpy(new->cb, old->cb, sizeof(old->cb));
+ new->local_df = old->local_df;
+ new->pkt_type = old->pkt_type;
+ new->stamp = old->stamp;
+ new->destructor = NULL;
+ new->security = old->security;
+#ifdef CONFIG_NETFILTER
+ new->nfmark = old->nfmark;
+ new->nfcache = old->nfcache;
+ new->nfct = old->nfct;
+ nf_conntrack_get(old->nfct);
+ new->nfctinfo = old->nfctinfo;
+#ifdef CONFIG_NETFILTER_DEBUG
+ new->nf_debug = old->nf_debug;
+#endif
+#ifdef CONFIG_BRIDGE_NETFILTER
+ new->nf_bridge = old->nf_bridge;
+ nf_bridge_get(old->nf_bridge);
+#endif
+#endif
+#ifdef CONFIG_NET_SCHED
+#ifdef CONFIG_NET_CLS_ACT
+ new->tc_verd = old->tc_verd;
+#endif
+ new->tc_index = old->tc_index;
+#endif
+ atomic_set(&new->users, 1);
+ skb_shinfo(new)->tso_size = skb_shinfo(old)->tso_size;
+ skb_shinfo(new)->tso_segs = skb_shinfo(old)->tso_segs;
+}
+
+/**
+ * skb_copy - create private copy of an sk_buff
+ * @skb: buffer to copy
+ * @gfp_mask: allocation priority
+ *
+ * Make a copy of both an &sk_buff and its data. This is used when the
+ * caller wishes to modify the data and needs a private copy of the
+ * data to alter. Returns %NULL on failure or the pointer to the buffer
+ * on success. The returned buffer has a reference count of 1.
+ *
+ * As by-product this function converts non-linear &sk_buff to linear
+ * one, so that &sk_buff becomes completely private and caller is allowed
+ * to modify all the data of returned buffer. This means that this
+ * function is not recommended for use in circumstances when only
+ * header is going to be modified. Use pskb_copy() instead.
+ */
+
+struct sk_buff *skb_copy(const struct sk_buff *skb, int gfp_mask)
+{
+ int headerlen = skb->data - skb->head;
+ /*
+ * Allocate the copy buffer
+ */
+ struct sk_buff *n = alloc_skb(skb->end - skb->head + skb->data_len,
+ gfp_mask);
+ if (!n)
+ return NULL;
+
+ /* Set the data pointer */
+ skb_reserve(n, headerlen);
+ /* Set the tail pointer and length */
+ skb_put(n, skb->len);
+ n->csum = skb->csum;
+ n->ip_summed = skb->ip_summed;
+
+ if (skb_copy_bits(skb, -headerlen, n->head, headerlen + skb->len))
+ BUG();
+
+ copy_skb_header(n, skb);
+ return n;
+}
+
+
+/**
+ * pskb_copy - create copy of an sk_buff with private head.
+ * @skb: buffer to copy
+ * @gfp_mask: allocation priority
+ *
+ * Make a copy of both an &sk_buff and part of its data, located
+ * in header. Fragmented data remain shared. This is used when
+ * the caller wishes to modify only header of &sk_buff and needs
+ * private copy of the header to alter. Returns %NULL on failure
+ * or the pointer to the buffer on success.
+ * The returned buffer has a reference count of 1.
+ */
+
+struct sk_buff *pskb_copy(struct sk_buff *skb, int gfp_mask)
+{
+ /*
+ * Allocate the copy buffer
+ */
+ struct sk_buff *n = alloc_skb(skb->end - skb->head, gfp_mask);
+
+ if (!n)
+ goto out;
+
+ /* Set the data pointer */
+ skb_reserve(n, skb->data - skb->head);
+ /* Set the tail pointer and length */
+ skb_put(n, skb_headlen(skb));
+ /* Copy the bytes */
+ memcpy(n->data, skb->data, n->len);
+ n->csum = skb->csum;
+ n->ip_summed = skb->ip_summed;
+
+ n->data_len = skb->data_len;
+ n->len = skb->len;
+
+ if (skb_shinfo(skb)->nr_frags) {
+ int i;
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ skb_shinfo(n)->frags[i] = skb_shinfo(skb)->frags[i];
+ get_page(skb_shinfo(n)->frags[i].page);
+ }
+ skb_shinfo(n)->nr_frags = i;
+ }
+
+ if (skb_shinfo(skb)->frag_list) {
+ skb_shinfo(n)->frag_list = skb_shinfo(skb)->frag_list;
+ skb_clone_fraglist(n);
+ }
+
+ copy_skb_header(n, skb);
+out:
+ return n;
+}
+
+/**
+ * pskb_expand_head - reallocate header of &sk_buff
+ * @skb: buffer to reallocate
+ * @nhead: room to add at head
+ * @ntail: room to add at tail
+ * @gfp_mask: allocation priority
+ *
+ * Expands (or creates identical copy, if &nhead and &ntail are zero)
+ * header of skb. &sk_buff itself is not changed. &sk_buff MUST have
+ * reference count of 1. Returns zero in the case of success or error,
+ * if expansion failed. In the last case, &sk_buff is not changed.
+ *
+ * All the pointers pointing into skb header may change and must be
+ * reloaded after call to this function.
+ */
+
+int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail, int gfp_mask)
+{
+ int i;
+ u8 *data;
+ int size = nhead + (skb->end - skb->head) + ntail;
+ long off;
+
+ if (skb_shared(skb))
+ BUG();
+
+ size = SKB_DATA_ALIGN(size);
+
+ data = kmalloc(size + sizeof(struct skb_shared_info), gfp_mask);
+ if (!data)
+ goto nodata;
+
+ /* Copy only real data... and, alas, header. This should be
+ * optimized for the cases when header is void. */
+ memcpy(data + nhead, skb->head, skb->tail - skb->head);
+ memcpy(data + size, skb->end, sizeof(struct skb_shared_info));
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+ get_page(skb_shinfo(skb)->frags[i].page);
+
+ if (skb_shinfo(skb)->frag_list)
+ skb_clone_fraglist(skb);
+
+ skb_release_data(skb);
+
+ off = (data + nhead) - skb->head;
+
+ skb->head = data;
+ skb->end = data + size;
+ skb->data += off;
+ skb->tail += off;
+ skb->mac.raw += off;
+ skb->h.raw += off;
+ skb->nh.raw += off;
+ skb->cloned = 0;
+ skb->nohdr = 0;
+ atomic_set(&skb_shinfo(skb)->dataref, 1);
+ return 0;
+
+nodata:
+ return -ENOMEM;
+}
+
+/* Make private copy of skb with writable head and some headroom */
+
+struct sk_buff *skb_realloc_headroom(struct sk_buff *skb, unsigned int headroom)
+{
+ struct sk_buff *skb2;
+ int delta = headroom - skb_headroom(skb);
+
+ if (delta <= 0)
+ skb2 = pskb_copy(skb, GFP_ATOMIC);
+ else {
+ skb2 = skb_clone(skb, GFP_ATOMIC);
+ if (skb2 && pskb_expand_head(skb2, SKB_DATA_ALIGN(delta), 0,
+ GFP_ATOMIC)) {
+ kfree_skb(skb2);
+ skb2 = NULL;
+ }
+ }
+ return skb2;
+}
+
+
+/**
+ * skb_copy_expand - copy and expand sk_buff
+ * @skb: buffer to copy
+ * @newheadroom: new free bytes at head
+ * @newtailroom: new free bytes at tail
+ * @gfp_mask: allocation priority
+ *
+ * Make a copy of both an &sk_buff and its data and while doing so
+ * allocate additional space.
+ *
+ * This is used when the caller wishes to modify the data and needs a
+ * private copy of the data to alter as well as more space for new fields.
+ * Returns %NULL on failure or the pointer to the buffer
+ * on success. The returned buffer has a reference count of 1.
+ *
+ * You must pass %GFP_ATOMIC as the allocation priority if this function
+ * is called from an interrupt.
+ *
+ * BUG ALERT: ip_summed is not copied. Why does this work? Is it used
+ * only by netfilter in the cases when checksum is recalculated? --ANK
+ */
+struct sk_buff *skb_copy_expand(const struct sk_buff *skb,
+ int newheadroom, int newtailroom, int gfp_mask)
+{
+ /*
+ * Allocate the copy buffer
+ */
+ struct sk_buff *n = alloc_skb(newheadroom + skb->len + newtailroom,
+ gfp_mask);
+ int head_copy_len, head_copy_off;
+
+ if (!n)
+ return NULL;
+
+ skb_reserve(n, newheadroom);
+
+ /* Set the tail pointer and length */
+ skb_put(n, skb->len);
+
+ head_copy_len = skb_headroom(skb);
+ head_copy_off = 0;
+ if (newheadroom <= head_copy_len)
+ head_copy_len = newheadroom;
+ else
+ head_copy_off = newheadroom - head_copy_len;
+
+ /* Copy the linear header and data. */
+ if (skb_copy_bits(skb, -head_copy_len, n->head + head_copy_off,
+ skb->len + head_copy_len))
+ BUG();
+
+ copy_skb_header(n, skb);
+
+ return n;
+}
+
+/**
+ * skb_pad - zero pad the tail of an skb
+ * @skb: buffer to pad
+ * @pad: space to pad
+ *
+ * Ensure that a buffer is followed by a padding area that is zero
+ * filled. Used by network drivers which may DMA or transfer data
+ * beyond the buffer end onto the wire.
+ *
+ * May return NULL in out of memory cases.
+ */
+
+struct sk_buff *skb_pad(struct sk_buff *skb, int pad)
+{
+ struct sk_buff *nskb;
+
+ /* If the skbuff is non linear tailroom is always zero.. */
+ if (skb_tailroom(skb) >= pad) {
+ memset(skb->data+skb->len, 0, pad);
+ return skb;
+ }
+
+ nskb = skb_copy_expand(skb, skb_headroom(skb), skb_tailroom(skb) + pad, GFP_ATOMIC);
+ kfree_skb(skb);
+ if (nskb)
+ memset(nskb->data+nskb->len, 0, pad);
+ return nskb;
+}
+
+/* Trims skb to length len. It can change skb pointers, if "realloc" is 1.
+ * If realloc==0 and trimming is impossible without change of data,
+ * it is BUG().
+ */
+
+int ___pskb_trim(struct sk_buff *skb, unsigned int len, int realloc)
+{
+ int offset = skb_headlen(skb);
+ int nfrags = skb_shinfo(skb)->nr_frags;
+ int i;
+
+ for (i = 0; i < nfrags; i++) {
+ int end = offset + skb_shinfo(skb)->frags[i].size;
+ if (end > len) {
+ if (skb_cloned(skb)) {
+ if (!realloc)
+ BUG();
+ if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
+ return -ENOMEM;
+ }
+ if (len <= offset) {
+ put_page(skb_shinfo(skb)->frags[i].page);
+ skb_shinfo(skb)->nr_frags--;
+ } else {
+ skb_shinfo(skb)->frags[i].size = len - offset;
+ }
+ }
+ offset = end;
+ }
+
+ if (offset < len) {
+ skb->data_len -= skb->len - len;
+ skb->len = len;
+ } else {
+ if (len <= skb_headlen(skb)) {
+ skb->len = len;
+ skb->data_len = 0;
+ skb->tail = skb->data + len;
+ if (skb_shinfo(skb)->frag_list && !skb_cloned(skb))
+ skb_drop_fraglist(skb);
+ } else {
+ skb->data_len -= skb->len - len;
+ skb->len = len;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * __pskb_pull_tail - advance tail of skb header
+ * @skb: buffer to reallocate
+ * @delta: number of bytes to advance tail
+ *
+ * The function makes a sense only on a fragmented &sk_buff,
+ * it expands header moving its tail forward and copying necessary
+ * data from fragmented part.
+ *
+ * &sk_buff MUST have reference count of 1.
+ *
+ * Returns %NULL (and &sk_buff does not change) if pull failed
+ * or value of new tail of skb in the case of success.
+ *
+ * All the pointers pointing into skb header may change and must be
+ * reloaded after call to this function.
+ */
+
+/* Moves tail of skb head forward, copying data from fragmented part,
+ * when it is necessary.
+ * 1. It may fail due to malloc failure.
+ * 2. It may change skb pointers.
+ *
+ * It is pretty complicated. Luckily, it is called only in exceptional cases.
+ */
+unsigned char *__pskb_pull_tail(struct sk_buff *skb, int delta)
+{
+ /* If skb has not enough free space at tail, get new one
+ * plus 128 bytes for future expansions. If we have enough
+ * room at tail, reallocate without expansion only if skb is cloned.
+ */
+ int i, k, eat = (skb->tail + delta) - skb->end;
+
+ if (eat > 0 || skb_cloned(skb)) {
+ if (pskb_expand_head(skb, 0, eat > 0 ? eat + 128 : 0,
+ GFP_ATOMIC))
+ return NULL;
+ }
+
+ if (skb_copy_bits(skb, skb_headlen(skb), skb->tail, delta))
+ BUG();
+
+ /* Optimization: no fragments, no reasons to preestimate
+ * size of pulled pages. Superb.
+ */
+ if (!skb_shinfo(skb)->frag_list)
+ goto pull_pages;
+
+ /* Estimate size of pulled pages. */
+ eat = delta;
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ if (skb_shinfo(skb)->frags[i].size >= eat)
+ goto pull_pages;
+ eat -= skb_shinfo(skb)->frags[i].size;
+ }
+
+ /* If we need update frag list, we are in troubles.
+ * Certainly, it possible to add an offset to skb data,
+ * but taking into account that pulling is expected to
+ * be very rare operation, it is worth to fight against
+ * further bloating skb head and crucify ourselves here instead.
+ * Pure masohism, indeed. 8)8)
+ */
+ if (eat) {
+ struct sk_buff *list = skb_shinfo(skb)->frag_list;
+ struct sk_buff *clone = NULL;
+ struct sk_buff *insp = NULL;
+
+ do {
+ if (!list)
+ BUG();
+
+ if (list->len <= eat) {
+ /* Eaten as whole. */
+ eat -= list->len;
+ list = list->next;
+ insp = list;
+ } else {
+ /* Eaten partially. */
+
+ if (skb_shared(list)) {
+ /* Sucks! We need to fork list. :-( */
+ clone = skb_clone(list, GFP_ATOMIC);
+ if (!clone)
+ return NULL;
+ insp = list->next;
+ list = clone;
+ } else {
+ /* This may be pulled without
+ * problems. */
+ insp = list;
+ }
+ if (!pskb_pull(list, eat)) {
+ if (clone)
+ kfree_skb(clone);
+ return NULL;
+ }
+ break;
+ }
+ } while (eat);
+
+ /* Free pulled out fragments. */
+ while ((list = skb_shinfo(skb)->frag_list) != insp) {
+ skb_shinfo(skb)->frag_list = list->next;
+ kfree_skb(list);
+ }
+ /* And insert new clone at head. */
+ if (clone) {
+ clone->next = list;
+ skb_shinfo(skb)->frag_list = clone;
+ }
+ }
+ /* Success! Now we may commit changes to skb data. */
+
+pull_pages:
+ eat = delta;
+ k = 0;
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ if (skb_shinfo(skb)->frags[i].size <= eat) {
+ put_page(skb_shinfo(skb)->frags[i].page);
+ eat -= skb_shinfo(skb)->frags[i].size;
+ } else {
+ skb_shinfo(skb)->frags[k] = skb_shinfo(skb)->frags[i];
+ if (eat) {
+ skb_shinfo(skb)->frags[k].page_offset += eat;
+ skb_shinfo(skb)->frags[k].size -= eat;
+ eat = 0;
+ }
+ k++;
+ }
+ }
+ skb_shinfo(skb)->nr_frags = k;
+
+ skb->tail += delta;
+ skb->data_len -= delta;
+
+ return skb->tail;
+}
+
+/* Copy some data bits from skb to kernel buffer. */
+
+int skb_copy_bits(const struct sk_buff *skb, int offset, void *to, int len)
+{
+ int i, copy;
+ int start = skb_headlen(skb);
+
+ if (offset > (int)skb->len - len)
+ goto fault;
+
+ /* Copy header. */
+ if ((copy = start - offset) > 0) {
+ if (copy > len)
+ copy = len;
+ memcpy(to, skb->data + offset, copy);
+ if ((len -= copy) == 0)
+ return 0;
+ offset += copy;
+ to += copy;
+ }
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + skb_shinfo(skb)->frags[i].size;
+ if ((copy = end - offset) > 0) {
+ u8 *vaddr;
+
+ if (copy > len)
+ copy = len;
+
+ vaddr = kmap_skb_frag(&skb_shinfo(skb)->frags[i]);
+ memcpy(to,
+ vaddr + skb_shinfo(skb)->frags[i].page_offset+
+ offset - start, copy);
+ kunmap_skb_frag(vaddr);
+
+ if ((len -= copy) == 0)
+ return 0;
+ offset += copy;
+ to += copy;
+ }
+ start = end;
+ }
+
+ if (skb_shinfo(skb)->frag_list) {
+ struct sk_buff *list = skb_shinfo(skb)->frag_list;
+
+ for (; list; list = list->next) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + list->len;
+ if ((copy = end - offset) > 0) {
+ if (copy > len)
+ copy = len;
+ if (skb_copy_bits(list, offset - start,
+ to, copy))
+ goto fault;
+ if ((len -= copy) == 0)
+ return 0;
+ offset += copy;
+ to += copy;
+ }
+ start = end;
+ }
+ }
+ if (!len)
+ return 0;
+
+fault:
+ return -EFAULT;
+}
+
+/* Checksum skb data. */
+
+unsigned int skb_checksum(const struct sk_buff *skb, int offset,
+ int len, unsigned int csum)
+{
+ int start = skb_headlen(skb);
+ int i, copy = start - offset;
+ int pos = 0;
+
+ /* Checksum header. */
+ if (copy > 0) {
+ if (copy > len)
+ copy = len;
+ csum = csum_partial(skb->data + offset, copy, csum);
+ if ((len -= copy) == 0)
+ return csum;
+ offset += copy;
+ pos = copy;
+ }
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + skb_shinfo(skb)->frags[i].size;
+ if ((copy = end - offset) > 0) {
+ unsigned int csum2;
+ u8 *vaddr;
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
+ if (copy > len)
+ copy = len;
+ vaddr = kmap_skb_frag(frag);
+ csum2 = csum_partial(vaddr + frag->page_offset +
+ offset - start, copy, 0);
+ kunmap_skb_frag(vaddr);
+ csum = csum_block_add(csum, csum2, pos);
+ if (!(len -= copy))
+ return csum;
+ offset += copy;
+ pos += copy;
+ }
+ start = end;
+ }
+
+ if (skb_shinfo(skb)->frag_list) {
+ struct sk_buff *list = skb_shinfo(skb)->frag_list;
+
+ for (; list; list = list->next) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + list->len;
+ if ((copy = end - offset) > 0) {
+ unsigned int csum2;
+ if (copy > len)
+ copy = len;
+ csum2 = skb_checksum(list, offset - start,
+ copy, 0);
+ csum = csum_block_add(csum, csum2, pos);
+ if ((len -= copy) == 0)
+ return csum;
+ offset += copy;
+ pos += copy;
+ }
+ start = end;
+ }
+ }
+ if (len)
+ BUG();
+
+ return csum;
+}
+
+/* Both of above in one bottle. */
+
+unsigned int skb_copy_and_csum_bits(const struct sk_buff *skb, int offset,
+ u8 *to, int len, unsigned int csum)
+{
+ int start = skb_headlen(skb);
+ int i, copy = start - offset;
+ int pos = 0;
+
+ /* Copy header. */
+ if (copy > 0) {
+ if (copy > len)
+ copy = len;
+ csum = csum_partial_copy_nocheck(skb->data + offset, to,
+ copy, csum);
+ if ((len -= copy) == 0)
+ return csum;
+ offset += copy;
+ to += copy;
+ pos = copy;
+ }
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + skb_shinfo(skb)->frags[i].size;
+ if ((copy = end - offset) > 0) {
+ unsigned int csum2;
+ u8 *vaddr;
+ skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
+
+ if (copy > len)
+ copy = len;
+ vaddr = kmap_skb_frag(frag);
+ csum2 = csum_partial_copy_nocheck(vaddr +
+ frag->page_offset +
+ offset - start, to,
+ copy, 0);
+ kunmap_skb_frag(vaddr);
+ csum = csum_block_add(csum, csum2, pos);
+ if (!(len -= copy))
+ return csum;
+ offset += copy;
+ to += copy;
+ pos += copy;
+ }
+ start = end;
+ }
+
+ if (skb_shinfo(skb)->frag_list) {
+ struct sk_buff *list = skb_shinfo(skb)->frag_list;
+
+ for (; list; list = list->next) {
+ unsigned int csum2;
+ int end;
+
+ BUG_TRAP(start <= offset + len);
+
+ end = start + list->len;
+ if ((copy = end - offset) > 0) {
+ if (copy > len)
+ copy = len;
+ csum2 = skb_copy_and_csum_bits(list,
+ offset - start,
+ to, copy, 0);
+ csum = csum_block_add(csum, csum2, pos);
+ if ((len -= copy) == 0)
+ return csum;
+ offset += copy;
+ to += copy;
+ pos += copy;
+ }
+ start = end;
+ }
+ }
+ if (len)
+ BUG();
+ return csum;
+}
+
+void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to)
+{
+ unsigned int csum;
+ long csstart;
+
+ if (skb->ip_summed == CHECKSUM_HW)
+ csstart = skb->h.raw - skb->data;
+ else
+ csstart = skb_headlen(skb);
+
+ if (csstart > skb_headlen(skb))
+ BUG();
+
+ memcpy(to, skb->data, csstart);
+
+ csum = 0;
+ if (csstart != skb->len)
+ csum = skb_copy_and_csum_bits(skb, csstart, to + csstart,
+ skb->len - csstart, 0);
+
+ if (skb->ip_summed == CHECKSUM_HW) {
+ long csstuff = csstart + skb->csum;
+
+ *((unsigned short *)(to + csstuff)) = csum_fold(csum);
+ }
+}
+
+/**
+ * skb_dequeue - remove from the head of the queue
+ * @list: list to dequeue from
+ *
+ * Remove the head of the list. The list lock is taken so the function
+ * may be used safely with other locking list functions. The head item is
+ * returned or %NULL if the list is empty.
+ */
+
+struct sk_buff *skb_dequeue(struct sk_buff_head *list)
+{
+ unsigned long flags;
+ struct sk_buff *result;
+
+ spin_lock_irqsave(&list->lock, flags);
+ result = __skb_dequeue(list);
+ spin_unlock_irqrestore(&list->lock, flags);
+ return result;
+}
+
+/**
+ * skb_dequeue_tail - remove from the tail of the queue
+ * @list: list to dequeue from
+ *
+ * Remove the tail of the list. The list lock is taken so the function
+ * may be used safely with other locking list functions. The tail item is
+ * returned or %NULL if the list is empty.
+ */
+struct sk_buff *skb_dequeue_tail(struct sk_buff_head *list)
+{
+ unsigned long flags;
+ struct sk_buff *result;
+
+ spin_lock_irqsave(&list->lock, flags);
+ result = __skb_dequeue_tail(list);
+ spin_unlock_irqrestore(&list->lock, flags);
+ return result;
+}
+
+/**
+ * skb_queue_purge - empty a list
+ * @list: list to empty
+ *
+ * Delete all buffers on an &sk_buff list. Each buffer is removed from
+ * the list and one reference dropped. This function takes the list
+ * lock and is atomic with respect to other list locking functions.
+ */
+void skb_queue_purge(struct sk_buff_head *list)
+{
+ struct sk_buff *skb;
+ while ((skb = skb_dequeue(list)) != NULL)
+ kfree_skb(skb);
+}
+
+/**
+ * skb_queue_head - queue a buffer at the list head
+ * @list: list to use
+ * @newsk: buffer to queue
+ *
+ * Queue a buffer at the start of the list. This function takes the
+ * list lock and can be used safely with other locking &sk_buff functions
+ * safely.
+ *
+ * A buffer cannot be placed on two lists at the same time.
+ */
+void skb_queue_head(struct sk_buff_head *list, struct sk_buff *newsk)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&list->lock, flags);
+ __skb_queue_head(list, newsk);
+ spin_unlock_irqrestore(&list->lock, flags);
+}
+
+/**
+ * skb_queue_tail - queue a buffer at the list tail
+ * @list: list to use
+ * @newsk: buffer to queue
+ *
+ * Queue a buffer at the tail of the list. This function takes the
+ * list lock and can be used safely with other locking &sk_buff functions
+ * safely.
+ *
+ * A buffer cannot be placed on two lists at the same time.
+ */
+void skb_queue_tail(struct sk_buff_head *list, struct sk_buff *newsk)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&list->lock, flags);
+ __skb_queue_tail(list, newsk);
+ spin_unlock_irqrestore(&list->lock, flags);
+}
+/**
+ * skb_unlink - remove a buffer from a list
+ * @skb: buffer to remove
+ *
+ * Place a packet after a given packet in a list. The list locks are taken
+ * and this function is atomic with respect to other list locked calls
+ *
+ * Works even without knowing the list it is sitting on, which can be
+ * handy at times. It also means that THE LIST MUST EXIST when you
+ * unlink. Thus a list must have its contents unlinked before it is
+ * destroyed.
+ */
+void skb_unlink(struct sk_buff *skb)
+{
+ struct sk_buff_head *list = skb->list;
+
+ if (list) {
+ unsigned long flags;
+
+ spin_lock_irqsave(&list->lock, flags);
+ if (skb->list == list)
+ __skb_unlink(skb, skb->list);
+ spin_unlock_irqrestore(&list->lock, flags);
+ }
+}
+
+
+/**
+ * skb_append - append a buffer
+ * @old: buffer to insert after
+ * @newsk: buffer to insert
+ *
+ * Place a packet after a given packet in a list. The list locks are taken
+ * and this function is atomic with respect to other list locked calls.
+ * A buffer cannot be placed on two lists at the same time.
+ */
+
+void skb_append(struct sk_buff *old, struct sk_buff *newsk)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&old->list->lock, flags);
+ __skb_append(old, newsk);
+ spin_unlock_irqrestore(&old->list->lock, flags);
+}
+
+
+/**
+ * skb_insert - insert a buffer
+ * @old: buffer to insert before
+ * @newsk: buffer to insert
+ *
+ * Place a packet before a given packet in a list. The list locks are taken
+ * and this function is atomic with respect to other list locked calls
+ * A buffer cannot be placed on two lists at the same time.
+ */
+
+void skb_insert(struct sk_buff *old, struct sk_buff *newsk)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&old->list->lock, flags);
+ __skb_insert(newsk, old->prev, old, old->list);
+ spin_unlock_irqrestore(&old->list->lock, flags);
+}
+
+#if 0
+/*
+ * Tune the memory allocator for a new MTU size.
+ */
+void skb_add_mtu(int mtu)
+{
+ /* Must match allocation in alloc_skb */
+ mtu = SKB_DATA_ALIGN(mtu) + sizeof(struct skb_shared_info);
+
+ kmem_add_cache_size(mtu);
+}
+#endif
+
+static inline void skb_split_inside_header(struct sk_buff *skb,
+ struct sk_buff* skb1,
+ const u32 len, const int pos)
+{
+ int i;
+
+ memcpy(skb_put(skb1, pos - len), skb->data + len, pos - len);
+
+ /* And move data appendix as is. */
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++)
+ skb_shinfo(skb1)->frags[i] = skb_shinfo(skb)->frags[i];
+
+ skb_shinfo(skb1)->nr_frags = skb_shinfo(skb)->nr_frags;
+ skb_shinfo(skb)->nr_frags = 0;
+ skb1->data_len = skb->data_len;
+ skb1->len += skb1->data_len;
+ skb->data_len = 0;
+ skb->len = len;
+ skb->tail = skb->data + len;
+}
+
+static inline void skb_split_no_header(struct sk_buff *skb,
+ struct sk_buff* skb1,
+ const u32 len, int pos)
+{
+ int i, k = 0;
+ const int nfrags = skb_shinfo(skb)->nr_frags;
+
+ skb_shinfo(skb)->nr_frags = 0;
+ skb1->len = skb1->data_len = skb->len - len;
+ skb->len = len;
+ skb->data_len = len - pos;
+
+ for (i = 0; i < nfrags; i++) {
+ int size = skb_shinfo(skb)->frags[i].size;
+
+ if (pos + size > len) {
+ skb_shinfo(skb1)->frags[k] = skb_shinfo(skb)->frags[i];
+
+ if (pos < len) {
+ /* Split frag.
+ * We have two variants in this case:
+ * 1. Move all the frag to the second
+ * part, if it is possible. F.e.
+ * this approach is mandatory for TUX,
+ * where splitting is expensive.
+ * 2. Split is accurately. We make this.
+ */
+ get_page(skb_shinfo(skb)->frags[i].page);
+ skb_shinfo(skb1)->frags[0].page_offset += len - pos;
+ skb_shinfo(skb1)->frags[0].size -= len - pos;
+ skb_shinfo(skb)->frags[i].size = len - pos;
+ skb_shinfo(skb)->nr_frags++;
+ }
+ k++;
+ } else
+ skb_shinfo(skb)->nr_frags++;
+ pos += size;
+ }
+ skb_shinfo(skb1)->nr_frags = k;
+}
+
+/**
+ * skb_split - Split fragmented skb to two parts at length len.
+ * @skb: the buffer to split
+ * @skb1: the buffer to receive the second part
+ * @len: new length for skb
+ */
+void skb_split(struct sk_buff *skb, struct sk_buff *skb1, const u32 len)
+{
+ int pos = skb_headlen(skb);
+
+ if (len < pos) /* Split line is inside header. */
+ skb_split_inside_header(skb, skb1, len, pos);
+ else /* Second chunk has no header, nothing to copy. */
+ skb_split_no_header(skb, skb1, len, pos);
+}
+
+void __init skb_init(void)
+{
+ skbuff_head_cache = kmem_cache_create("skbuff_head_cache",
+ sizeof(struct sk_buff),
+ 0,
+ SLAB_HWCACHE_ALIGN,
+ NULL, NULL);
+ if (!skbuff_head_cache)
+ panic("cannot create skbuff cache");
+}
+
+EXPORT_SYMBOL(___pskb_trim);
+EXPORT_SYMBOL(__kfree_skb);
+EXPORT_SYMBOL(__pskb_pull_tail);
+EXPORT_SYMBOL(alloc_skb);
+EXPORT_SYMBOL(pskb_copy);
+EXPORT_SYMBOL(pskb_expand_head);
+EXPORT_SYMBOL(skb_checksum);
+EXPORT_SYMBOL(skb_clone);
+EXPORT_SYMBOL(skb_clone_fraglist);
+EXPORT_SYMBOL(skb_copy);
+EXPORT_SYMBOL(skb_copy_and_csum_bits);
+EXPORT_SYMBOL(skb_copy_and_csum_dev);
+EXPORT_SYMBOL(skb_copy_bits);
+EXPORT_SYMBOL(skb_copy_expand);
+EXPORT_SYMBOL(skb_over_panic);
+EXPORT_SYMBOL(skb_pad);
+EXPORT_SYMBOL(skb_realloc_headroom);
+EXPORT_SYMBOL(skb_under_panic);
+EXPORT_SYMBOL(skb_dequeue);
+EXPORT_SYMBOL(skb_dequeue_tail);
+EXPORT_SYMBOL(skb_insert);
+EXPORT_SYMBOL(skb_queue_purge);
+EXPORT_SYMBOL(skb_queue_head);
+EXPORT_SYMBOL(skb_queue_tail);
+EXPORT_SYMBOL(skb_unlink);
+EXPORT_SYMBOL(skb_append);
+EXPORT_SYMBOL(skb_split);
diff --git a/net/core/sock.c b/net/core/sock.c
new file mode 100644
index 0000000..629ab4a
--- /dev/null
+++ b/net/core/sock.c
@@ -0,0 +1,1565 @@
+/*
+ * INET An implementation of the TCP/IP protocol suite for the LINUX
+ * operating system. INET is implemented using the BSD Socket
+ * interface as the means of communication with the user level.
+ *
+ * Generic socket support routines. Memory allocators, socket lock/release
+ * handler for protocols to use and generic option handler.
+ *
+ *
+ * Version: $Id: sock.c,v 1.117 2002/02/01 22:01:03 davem Exp $
+ *
+ * Authors: Ross Biro, <bir7@leland.Stanford.Edu>
+ * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Florian La Roche, <flla@stud.uni-sb.de>
+ * Alan Cox, <A.Cox@swansea.ac.uk>
+ *
+ * Fixes:
+ * Alan Cox : Numerous verify_area() problems
+ * Alan Cox : Connecting on a connecting socket
+ * now returns an error for tcp.
+ * Alan Cox : sock->protocol is set correctly.
+ * and is not sometimes left as 0.
+ * Alan Cox : connect handles icmp errors on a
+ * connect properly. Unfortunately there
+ * is a restart syscall nasty there. I
+ * can't match BSD without hacking the C
+ * library. Ideas urgently sought!
+ * Alan Cox : Disallow bind() to addresses that are
+ * not ours - especially broadcast ones!!
+ * Alan Cox : Socket 1024 _IS_ ok for users. (fencepost)
+ * Alan Cox : sock_wfree/sock_rfree don't destroy sockets,
+ * instead they leave that for the DESTROY timer.
+ * Alan Cox : Clean up error flag in accept
+ * Alan Cox : TCP ack handling is buggy, the DESTROY timer
+ * was buggy. Put a remove_sock() in the handler
+ * for memory when we hit 0. Also altered the timer
+ * code. The ACK stuff can wait and needs major
+ * TCP layer surgery.
+ * Alan Cox : Fixed TCP ack bug, removed remove sock
+ * and fixed timer/inet_bh race.
+ * Alan Cox : Added zapped flag for TCP
+ * Alan Cox : Move kfree_skb into skbuff.c and tidied up surplus code
+ * Alan Cox : for new sk_buff allocations wmalloc/rmalloc now call alloc_skb
+ * Alan Cox : kfree_s calls now are kfree_skbmem so we can track skb resources
+ * Alan Cox : Supports socket option broadcast now as does udp. Packet and raw need fixing.
+ * Alan Cox : Added RCVBUF,SNDBUF size setting. It suddenly occurred to me how easy it was so...
+ * Rick Sladkey : Relaxed UDP rules for matching packets.
+ * C.E.Hawkins : IFF_PROMISC/SIOCGHWADDR support
+ * Pauline Middelink : identd support
+ * Alan Cox : Fixed connect() taking signals I think.
+ * Alan Cox : SO_LINGER supported
+ * Alan Cox : Error reporting fixes
+ * Anonymous : inet_create tidied up (sk->reuse setting)
+ * Alan Cox : inet sockets don't set sk->type!
+ * Alan Cox : Split socket option code
+ * Alan Cox : Callbacks
+ * Alan Cox : Nagle flag for Charles & Johannes stuff
+ * Alex : Removed restriction on inet fioctl
+ * Alan Cox : Splitting INET from NET core
+ * Alan Cox : Fixed bogus SO_TYPE handling in getsockopt()
+ * Adam Caldwell : Missing return in SO_DONTROUTE/SO_DEBUG code
+ * Alan Cox : Split IP from generic code
+ * Alan Cox : New kfree_skbmem()
+ * Alan Cox : Make SO_DEBUG superuser only.
+ * Alan Cox : Allow anyone to clear SO_DEBUG
+ * (compatibility fix)
+ * Alan Cox : Added optimistic memory grabbing for AF_UNIX throughput.
+ * Alan Cox : Allocator for a socket is settable.
+ * Alan Cox : SO_ERROR includes soft errors.
+ * Alan Cox : Allow NULL arguments on some SO_ opts
+ * Alan Cox : Generic socket allocation to make hooks
+ * easier (suggested by Craig Metz).
+ * Michael Pall : SO_ERROR returns positive errno again
+ * Steve Whitehouse: Added default destructor to free
+ * protocol private data.
+ * Steve Whitehouse: Added various other default routines
+ * common to several socket families.
+ * Chris Evans : Call suser() check last on F_SETOWN
+ * Jay Schulist : Added SO_ATTACH_FILTER and SO_DETACH_FILTER.
+ * Andi Kleen : Add sock_kmalloc()/sock_kfree_s()
+ * Andi Kleen : Fix write_space callback
+ * Chris Evans : Security fixes - signedness again
+ * Arnaldo C. Melo : cleanups, use skb_queue_purge
+ *
+ * To Fix:
+ *
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/poll.h>
+#include <linux/tcp.h>
+#include <linux/init.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+
+#include <linux/netdevice.h>
+#include <net/protocol.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <net/xfrm.h>
+#include <linux/ipsec.h>
+
+#include <linux/filter.h>
+
+#ifdef CONFIG_INET
+#include <net/tcp.h>
+#endif
+
+/* Take into consideration the size of the struct sk_buff overhead in the
+ * determination of these values, since that is non-constant across
+ * platforms. This makes socket queueing behavior and performance
+ * not depend upon such differences.
+ */
+#define _SK_MEM_PACKETS 256
+#define _SK_MEM_OVERHEAD (sizeof(struct sk_buff) + 256)
+#define SK_WMEM_MAX (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
+#define SK_RMEM_MAX (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS)
+
+/* Run time adjustable parameters. */
+__u32 sysctl_wmem_max = SK_WMEM_MAX;
+__u32 sysctl_rmem_max = SK_RMEM_MAX;
+__u32 sysctl_wmem_default = SK_WMEM_MAX;
+__u32 sysctl_rmem_default = SK_RMEM_MAX;
+
+/* Maximal space eaten by iovec or ancilliary data plus some space */
+int sysctl_optmem_max = sizeof(unsigned long)*(2*UIO_MAXIOV + 512);
+
+static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
+{
+ struct timeval tv;
+
+ if (optlen < sizeof(tv))
+ return -EINVAL;
+ if (copy_from_user(&tv, optval, sizeof(tv)))
+ return -EFAULT;
+
+ *timeo_p = MAX_SCHEDULE_TIMEOUT;
+ if (tv.tv_sec == 0 && tv.tv_usec == 0)
+ return 0;
+ if (tv.tv_sec < (MAX_SCHEDULE_TIMEOUT/HZ - 1))
+ *timeo_p = tv.tv_sec*HZ + (tv.tv_usec+(1000000/HZ-1))/(1000000/HZ);
+ return 0;
+}
+
+static void sock_warn_obsolete_bsdism(const char *name)
+{
+ static int warned;
+ static char warncomm[TASK_COMM_LEN];
+ if (strcmp(warncomm, current->comm) && warned < 5) {
+ strcpy(warncomm, current->comm);
+ printk(KERN_WARNING "process `%s' is using obsolete "
+ "%s SO_BSDCOMPAT\n", warncomm, name);
+ warned++;
+ }
+}
+
+static void sock_disable_timestamp(struct sock *sk)
+{
+ if (sock_flag(sk, SOCK_TIMESTAMP)) {
+ sock_reset_flag(sk, SOCK_TIMESTAMP);
+ net_disable_timestamp();
+ }
+}
+
+
+/*
+ * This is meant for all protocols to use and covers goings on
+ * at the socket level. Everything here is generic.
+ */
+
+int sock_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct sock *sk=sock->sk;
+ struct sk_filter *filter;
+ int val;
+ int valbool;
+ struct linger ling;
+ int ret = 0;
+
+ /*
+ * Options without arguments
+ */
+
+#ifdef SO_DONTLINGER /* Compatibility item... */
+ switch (optname) {
+ case SO_DONTLINGER:
+ sock_reset_flag(sk, SOCK_LINGER);
+ return 0;
+ }
+#endif
+
+ if(optlen<sizeof(int))
+ return(-EINVAL);
+
+ if (get_user(val, (int __user *)optval))
+ return -EFAULT;
+
+ valbool = val?1:0;
+
+ lock_sock(sk);
+
+ switch(optname)
+ {
+ case SO_DEBUG:
+ if(val && !capable(CAP_NET_ADMIN))
+ {
+ ret = -EACCES;
+ }
+ else if (valbool)
+ sock_set_flag(sk, SOCK_DBG);
+ else
+ sock_reset_flag(sk, SOCK_DBG);
+ break;
+ case SO_REUSEADDR:
+ sk->sk_reuse = valbool;
+ break;
+ case SO_TYPE:
+ case SO_ERROR:
+ ret = -ENOPROTOOPT;
+ break;
+ case SO_DONTROUTE:
+ if (valbool)
+ sock_set_flag(sk, SOCK_LOCALROUTE);
+ else
+ sock_reset_flag(sk, SOCK_LOCALROUTE);
+ break;
+ case SO_BROADCAST:
+ sock_valbool_flag(sk, SOCK_BROADCAST, valbool);
+ break;
+ case SO_SNDBUF:
+ /* Don't error on this BSD doesn't and if you think
+ about it this is right. Otherwise apps have to
+ play 'guess the biggest size' games. RCVBUF/SNDBUF
+ are treated in BSD as hints */
+
+ if (val > sysctl_wmem_max)
+ val = sysctl_wmem_max;
+
+ sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
+ if ((val * 2) < SOCK_MIN_SNDBUF)
+ sk->sk_sndbuf = SOCK_MIN_SNDBUF;
+ else
+ sk->sk_sndbuf = val * 2;
+
+ /*
+ * Wake up sending tasks if we
+ * upped the value.
+ */
+ sk->sk_write_space(sk);
+ break;
+
+ case SO_RCVBUF:
+ /* Don't error on this BSD doesn't and if you think
+ about it this is right. Otherwise apps have to
+ play 'guess the biggest size' games. RCVBUF/SNDBUF
+ are treated in BSD as hints */
+
+ if (val > sysctl_rmem_max)
+ val = sysctl_rmem_max;
+
+ sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
+ /* FIXME: is this lower bound the right one? */
+ if ((val * 2) < SOCK_MIN_RCVBUF)
+ sk->sk_rcvbuf = SOCK_MIN_RCVBUF;
+ else
+ sk->sk_rcvbuf = val * 2;
+ break;
+
+ case SO_KEEPALIVE:
+#ifdef CONFIG_INET
+ if (sk->sk_protocol == IPPROTO_TCP)
+ tcp_set_keepalive(sk, valbool);
+#endif
+ sock_valbool_flag(sk, SOCK_KEEPOPEN, valbool);
+ break;
+
+ case SO_OOBINLINE:
+ sock_valbool_flag(sk, SOCK_URGINLINE, valbool);
+ break;
+
+ case SO_NO_CHECK:
+ sk->sk_no_check = valbool;
+ break;
+
+ case SO_PRIORITY:
+ if ((val >= 0 && val <= 6) || capable(CAP_NET_ADMIN))
+ sk->sk_priority = val;
+ else
+ ret = -EPERM;
+ break;
+
+ case SO_LINGER:
+ if(optlen<sizeof(ling)) {
+ ret = -EINVAL; /* 1003.1g */
+ break;
+ }
+ if (copy_from_user(&ling,optval,sizeof(ling))) {
+ ret = -EFAULT;
+ break;
+ }
+ if (!ling.l_onoff)
+ sock_reset_flag(sk, SOCK_LINGER);
+ else {
+#if (BITS_PER_LONG == 32)
+ if (ling.l_linger >= MAX_SCHEDULE_TIMEOUT/HZ)
+ sk->sk_lingertime = MAX_SCHEDULE_TIMEOUT;
+ else
+#endif
+ sk->sk_lingertime = ling.l_linger * HZ;
+ sock_set_flag(sk, SOCK_LINGER);
+ }
+ break;
+
+ case SO_BSDCOMPAT:
+ sock_warn_obsolete_bsdism("setsockopt");
+ break;
+
+ case SO_PASSCRED:
+ if (valbool)
+ set_bit(SOCK_PASSCRED, &sock->flags);
+ else
+ clear_bit(SOCK_PASSCRED, &sock->flags);
+ break;
+
+ case SO_TIMESTAMP:
+ if (valbool) {
+ sock_set_flag(sk, SOCK_RCVTSTAMP);
+ sock_enable_timestamp(sk);
+ } else
+ sock_reset_flag(sk, SOCK_RCVTSTAMP);
+ break;
+
+ case SO_RCVLOWAT:
+ if (val < 0)
+ val = INT_MAX;
+ sk->sk_rcvlowat = val ? : 1;
+ break;
+
+ case SO_RCVTIMEO:
+ ret = sock_set_timeout(&sk->sk_rcvtimeo, optval, optlen);
+ break;
+
+ case SO_SNDTIMEO:
+ ret = sock_set_timeout(&sk->sk_sndtimeo, optval, optlen);
+ break;
+
+#ifdef CONFIG_NETDEVICES
+ case SO_BINDTODEVICE:
+ {
+ char devname[IFNAMSIZ];
+
+ /* Sorry... */
+ if (!capable(CAP_NET_RAW)) {
+ ret = -EPERM;
+ break;
+ }
+
+ /* Bind this socket to a particular device like "eth0",
+ * as specified in the passed interface name. If the
+ * name is "" or the option length is zero the socket
+ * is not bound.
+ */
+
+ if (!valbool) {
+ sk->sk_bound_dev_if = 0;
+ } else {
+ if (optlen > IFNAMSIZ)
+ optlen = IFNAMSIZ;
+ if (copy_from_user(devname, optval, optlen)) {
+ ret = -EFAULT;
+ break;
+ }
+
+ /* Remove any cached route for this socket. */
+ sk_dst_reset(sk);
+
+ if (devname[0] == '\0') {
+ sk->sk_bound_dev_if = 0;
+ } else {
+ struct net_device *dev = dev_get_by_name(devname);
+ if (!dev) {
+ ret = -ENODEV;
+ break;
+ }
+ sk->sk_bound_dev_if = dev->ifindex;
+ dev_put(dev);
+ }
+ }
+ break;
+ }
+#endif
+
+
+ case SO_ATTACH_FILTER:
+ ret = -EINVAL;
+ if (optlen == sizeof(struct sock_fprog)) {
+ struct sock_fprog fprog;
+
+ ret = -EFAULT;
+ if (copy_from_user(&fprog, optval, sizeof(fprog)))
+ break;
+
+ ret = sk_attach_filter(&fprog, sk);
+ }
+ break;
+
+ case SO_DETACH_FILTER:
+ spin_lock_bh(&sk->sk_lock.slock);
+ filter = sk->sk_filter;
+ if (filter) {
+ sk->sk_filter = NULL;
+ spin_unlock_bh(&sk->sk_lock.slock);
+ sk_filter_release(sk, filter);
+ break;
+ }
+ spin_unlock_bh(&sk->sk_lock.slock);
+ ret = -ENONET;
+ break;
+
+ /* We implement the SO_SNDLOWAT etc to
+ not be settable (1003.1g 5.3) */
+ default:
+ ret = -ENOPROTOOPT;
+ break;
+ }
+ release_sock(sk);
+ return ret;
+}
+
+
+int sock_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+
+ union
+ {
+ int val;
+ struct linger ling;
+ struct timeval tm;
+ } v;
+
+ unsigned int lv = sizeof(int);
+ int len;
+
+ if(get_user(len,optlen))
+ return -EFAULT;
+ if(len < 0)
+ return -EINVAL;
+
+ switch(optname)
+ {
+ case SO_DEBUG:
+ v.val = sock_flag(sk, SOCK_DBG);
+ break;
+
+ case SO_DONTROUTE:
+ v.val = sock_flag(sk, SOCK_LOCALROUTE);
+ break;
+
+ case SO_BROADCAST:
+ v.val = !!sock_flag(sk, SOCK_BROADCAST);
+ break;
+
+ case SO_SNDBUF:
+ v.val = sk->sk_sndbuf;
+ break;
+
+ case SO_RCVBUF:
+ v.val = sk->sk_rcvbuf;
+ break;
+
+ case SO_REUSEADDR:
+ v.val = sk->sk_reuse;
+ break;
+
+ case SO_KEEPALIVE:
+ v.val = !!sock_flag(sk, SOCK_KEEPOPEN);
+ break;
+
+ case SO_TYPE:
+ v.val = sk->sk_type;
+ break;
+
+ case SO_ERROR:
+ v.val = -sock_error(sk);
+ if(v.val==0)
+ v.val = xchg(&sk->sk_err_soft, 0);
+ break;
+
+ case SO_OOBINLINE:
+ v.val = !!sock_flag(sk, SOCK_URGINLINE);
+ break;
+
+ case SO_NO_CHECK:
+ v.val = sk->sk_no_check;
+ break;
+
+ case SO_PRIORITY:
+ v.val = sk->sk_priority;
+ break;
+
+ case SO_LINGER:
+ lv = sizeof(v.ling);
+ v.ling.l_onoff = !!sock_flag(sk, SOCK_LINGER);
+ v.ling.l_linger = sk->sk_lingertime / HZ;
+ break;
+
+ case SO_BSDCOMPAT:
+ sock_warn_obsolete_bsdism("getsockopt");
+ break;
+
+ case SO_TIMESTAMP:
+ v.val = sock_flag(sk, SOCK_RCVTSTAMP);
+ break;
+
+ case SO_RCVTIMEO:
+ lv=sizeof(struct timeval);
+ if (sk->sk_rcvtimeo == MAX_SCHEDULE_TIMEOUT) {
+ v.tm.tv_sec = 0;
+ v.tm.tv_usec = 0;
+ } else {
+ v.tm.tv_sec = sk->sk_rcvtimeo / HZ;
+ v.tm.tv_usec = ((sk->sk_rcvtimeo % HZ) * 1000000) / HZ;
+ }
+ break;
+
+ case SO_SNDTIMEO:
+ lv=sizeof(struct timeval);
+ if (sk->sk_sndtimeo == MAX_SCHEDULE_TIMEOUT) {
+ v.tm.tv_sec = 0;
+ v.tm.tv_usec = 0;
+ } else {
+ v.tm.tv_sec = sk->sk_sndtimeo / HZ;
+ v.tm.tv_usec = ((sk->sk_sndtimeo % HZ) * 1000000) / HZ;
+ }
+ break;
+
+ case SO_RCVLOWAT:
+ v.val = sk->sk_rcvlowat;
+ break;
+
+ case SO_SNDLOWAT:
+ v.val=1;
+ break;
+
+ case SO_PASSCRED:
+ v.val = test_bit(SOCK_PASSCRED, &sock->flags) ? 1 : 0;
+ break;
+
+ case SO_PEERCRED:
+ if (len > sizeof(sk->sk_peercred))
+ len = sizeof(sk->sk_peercred);
+ if (copy_to_user(optval, &sk->sk_peercred, len))
+ return -EFAULT;
+ goto lenout;
+
+ case SO_PEERNAME:
+ {
+ char address[128];
+
+ if (sock->ops->getname(sock, (struct sockaddr *)address, &lv, 2))
+ return -ENOTCONN;
+ if (lv < len)
+ return -EINVAL;
+ if (copy_to_user(optval, address, len))
+ return -EFAULT;
+ goto lenout;
+ }
+
+ /* Dubious BSD thing... Probably nobody even uses it, but
+ * the UNIX standard wants it for whatever reason... -DaveM
+ */
+ case SO_ACCEPTCONN:
+ v.val = sk->sk_state == TCP_LISTEN;
+ break;
+
+ case SO_PEERSEC:
+ return security_socket_getpeersec(sock, optval, optlen, len);
+
+ default:
+ return(-ENOPROTOOPT);
+ }
+ if (len > lv)
+ len = lv;
+ if (copy_to_user(optval, &v, len))
+ return -EFAULT;
+lenout:
+ if (put_user(len, optlen))
+ return -EFAULT;
+ return 0;
+}
+
+/**
+ * sk_alloc - All socket objects are allocated here
+ * @family - protocol family
+ * @priority - for allocation (%GFP_KERNEL, %GFP_ATOMIC, etc)
+ * @prot - struct proto associated with this new sock instance
+ * @zero_it - if we should zero the newly allocated sock
+ */
+struct sock *sk_alloc(int family, int priority, struct proto *prot, int zero_it)
+{
+ struct sock *sk = NULL;
+ kmem_cache_t *slab = prot->slab;
+
+ if (slab != NULL)
+ sk = kmem_cache_alloc(slab, priority);
+ else
+ sk = kmalloc(prot->obj_size, priority);
+
+ if (sk) {
+ if (zero_it) {
+ memset(sk, 0, prot->obj_size);
+ sk->sk_family = family;
+ sk->sk_prot = prot;
+ sock_lock_init(sk);
+ }
+
+ if (security_sk_alloc(sk, family, priority)) {
+ kmem_cache_free(slab, sk);
+ sk = NULL;
+ } else
+ __module_get(prot->owner);
+ }
+ return sk;
+}
+
+void sk_free(struct sock *sk)
+{
+ struct sk_filter *filter;
+ struct module *owner = sk->sk_prot->owner;
+
+ if (sk->sk_destruct)
+ sk->sk_destruct(sk);
+
+ filter = sk->sk_filter;
+ if (filter) {
+ sk_filter_release(sk, filter);
+ sk->sk_filter = NULL;
+ }
+
+ sock_disable_timestamp(sk);
+
+ if (atomic_read(&sk->sk_omem_alloc))
+ printk(KERN_DEBUG "%s: optmem leakage (%d bytes) detected.\n",
+ __FUNCTION__, atomic_read(&sk->sk_omem_alloc));
+
+ security_sk_free(sk);
+ if (sk->sk_prot->slab != NULL)
+ kmem_cache_free(sk->sk_prot->slab, sk);
+ else
+ kfree(sk);
+ module_put(owner);
+}
+
+void __init sk_init(void)
+{
+ if (num_physpages <= 4096) {
+ sysctl_wmem_max = 32767;
+ sysctl_rmem_max = 32767;
+ sysctl_wmem_default = 32767;
+ sysctl_rmem_default = 32767;
+ } else if (num_physpages >= 131072) {
+ sysctl_wmem_max = 131071;
+ sysctl_rmem_max = 131071;
+ }
+}
+
+/*
+ * Simple resource managers for sockets.
+ */
+
+
+/*
+ * Write buffer destructor automatically called from kfree_skb.
+ */
+void sock_wfree(struct sk_buff *skb)
+{
+ struct sock *sk = skb->sk;
+
+ /* In case it might be waiting for more memory. */
+ atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
+ if (!sock_flag(sk, SOCK_USE_WRITE_QUEUE))
+ sk->sk_write_space(sk);
+ sock_put(sk);
+}
+
+/*
+ * Read buffer destructor automatically called from kfree_skb.
+ */
+void sock_rfree(struct sk_buff *skb)
+{
+ struct sock *sk = skb->sk;
+
+ atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
+}
+
+
+int sock_i_uid(struct sock *sk)
+{
+ int uid;
+
+ read_lock(&sk->sk_callback_lock);
+ uid = sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_uid : 0;
+ read_unlock(&sk->sk_callback_lock);
+ return uid;
+}
+
+unsigned long sock_i_ino(struct sock *sk)
+{
+ unsigned long ino;
+
+ read_lock(&sk->sk_callback_lock);
+ ino = sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_ino : 0;
+ read_unlock(&sk->sk_callback_lock);
+ return ino;
+}
+
+/*
+ * Allocate a skb from the socket's send buffer.
+ */
+struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force, int priority)
+{
+ if (force || atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) {
+ struct sk_buff * skb = alloc_skb(size, priority);
+ if (skb) {
+ skb_set_owner_w(skb, sk);
+ return skb;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Allocate a skb from the socket's receive buffer.
+ */
+struct sk_buff *sock_rmalloc(struct sock *sk, unsigned long size, int force, int priority)
+{
+ if (force || atomic_read(&sk->sk_rmem_alloc) < sk->sk_rcvbuf) {
+ struct sk_buff *skb = alloc_skb(size, priority);
+ if (skb) {
+ skb_set_owner_r(skb, sk);
+ return skb;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Allocate a memory block from the socket's option memory buffer.
+ */
+void *sock_kmalloc(struct sock *sk, int size, int priority)
+{
+ if ((unsigned)size <= sysctl_optmem_max &&
+ atomic_read(&sk->sk_omem_alloc) + size < sysctl_optmem_max) {
+ void *mem;
+ /* First do the add, to avoid the race if kmalloc
+ * might sleep.
+ */
+ atomic_add(size, &sk->sk_omem_alloc);
+ mem = kmalloc(size, priority);
+ if (mem)
+ return mem;
+ atomic_sub(size, &sk->sk_omem_alloc);
+ }
+ return NULL;
+}
+
+/*
+ * Free an option memory block.
+ */
+void sock_kfree_s(struct sock *sk, void *mem, int size)
+{
+ kfree(mem);
+ atomic_sub(size, &sk->sk_omem_alloc);
+}
+
+/* It is almost wait_for_tcp_memory minus release_sock/lock_sock.
+ I think, these locks should be removed for datagram sockets.
+ */
+static long sock_wait_for_wmem(struct sock * sk, long timeo)
+{
+ DEFINE_WAIT(wait);
+
+ clear_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
+ for (;;) {
+ if (!timeo)
+ break;
+ if (signal_pending(current))
+ break;
+ set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf)
+ break;
+ if (sk->sk_shutdown & SEND_SHUTDOWN)
+ break;
+ if (sk->sk_err)
+ break;
+ timeo = schedule_timeout(timeo);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ return timeo;
+}
+
+
+/*
+ * Generic send/receive buffer handlers
+ */
+
+static struct sk_buff *sock_alloc_send_pskb(struct sock *sk,
+ unsigned long header_len,
+ unsigned long data_len,
+ int noblock, int *errcode)
+{
+ struct sk_buff *skb;
+ unsigned int gfp_mask;
+ long timeo;
+ int err;
+
+ gfp_mask = sk->sk_allocation;
+ if (gfp_mask & __GFP_WAIT)
+ gfp_mask |= __GFP_REPEAT;
+
+ timeo = sock_sndtimeo(sk, noblock);
+ while (1) {
+ err = sock_error(sk);
+ if (err != 0)
+ goto failure;
+
+ err = -EPIPE;
+ if (sk->sk_shutdown & SEND_SHUTDOWN)
+ goto failure;
+
+ if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) {
+ skb = alloc_skb(header_len, sk->sk_allocation);
+ if (skb) {
+ int npages;
+ int i;
+
+ /* No pages, we're done... */
+ if (!data_len)
+ break;
+
+ npages = (data_len + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
+ skb->truesize += data_len;
+ skb_shinfo(skb)->nr_frags = npages;
+ for (i = 0; i < npages; i++) {
+ struct page *page;
+ skb_frag_t *frag;
+
+ page = alloc_pages(sk->sk_allocation, 0);
+ if (!page) {
+ err = -ENOBUFS;
+ skb_shinfo(skb)->nr_frags = i;
+ kfree_skb(skb);
+ goto failure;
+ }
+
+ frag = &skb_shinfo(skb)->frags[i];
+ frag->page = page;
+ frag->page_offset = 0;
+ frag->size = (data_len >= PAGE_SIZE ?
+ PAGE_SIZE :
+ data_len);
+ data_len -= PAGE_SIZE;
+ }
+
+ /* Full success... */
+ break;
+ }
+ err = -ENOBUFS;
+ goto failure;
+ }
+ set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
+ set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
+ err = -EAGAIN;
+ if (!timeo)
+ goto failure;
+ if (signal_pending(current))
+ goto interrupted;
+ timeo = sock_wait_for_wmem(sk, timeo);
+ }
+
+ skb_set_owner_w(skb, sk);
+ return skb;
+
+interrupted:
+ err = sock_intr_errno(timeo);
+failure:
+ *errcode = err;
+ return NULL;
+}
+
+struct sk_buff *sock_alloc_send_skb(struct sock *sk, unsigned long size,
+ int noblock, int *errcode)
+{
+ return sock_alloc_send_pskb(sk, size, 0, noblock, errcode);
+}
+
+static void __lock_sock(struct sock *sk)
+{
+ DEFINE_WAIT(wait);
+
+ for(;;) {
+ prepare_to_wait_exclusive(&sk->sk_lock.wq, &wait,
+ TASK_UNINTERRUPTIBLE);
+ spin_unlock_bh(&sk->sk_lock.slock);
+ schedule();
+ spin_lock_bh(&sk->sk_lock.slock);
+ if(!sock_owned_by_user(sk))
+ break;
+ }
+ finish_wait(&sk->sk_lock.wq, &wait);
+}
+
+static void __release_sock(struct sock *sk)
+{
+ struct sk_buff *skb = sk->sk_backlog.head;
+
+ do {
+ sk->sk_backlog.head = sk->sk_backlog.tail = NULL;
+ bh_unlock_sock(sk);
+
+ do {
+ struct sk_buff *next = skb->next;
+
+ skb->next = NULL;
+ sk->sk_backlog_rcv(sk, skb);
+
+ /*
+ * We are in process context here with softirqs
+ * disabled, use cond_resched_softirq() to preempt.
+ * This is safe to do because we've taken the backlog
+ * queue private:
+ */
+ cond_resched_softirq();
+
+ skb = next;
+ } while (skb != NULL);
+
+ bh_lock_sock(sk);
+ } while((skb = sk->sk_backlog.head) != NULL);
+}
+
+/**
+ * sk_wait_data - wait for data to arrive at sk_receive_queue
+ * sk - sock to wait on
+ * timeo - for how long
+ *
+ * Now socket state including sk->sk_err is changed only under lock,
+ * hence we may omit checks after joining wait queue.
+ * We check receive queue before schedule() only as optimization;
+ * it is very likely that release_sock() added new data.
+ */
+int sk_wait_data(struct sock *sk, long *timeo)
+{
+ int rc;
+ DEFINE_WAIT(wait);
+
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
+ rc = sk_wait_event(sk, timeo, !skb_queue_empty(&sk->sk_receive_queue));
+ clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
+ finish_wait(sk->sk_sleep, &wait);
+ return rc;
+}
+
+EXPORT_SYMBOL(sk_wait_data);
+
+/*
+ * Set of default routines for initialising struct proto_ops when
+ * the protocol does not support a particular function. In certain
+ * cases where it makes no sense for a protocol to have a "do nothing"
+ * function, some default processing is provided.
+ */
+
+int sock_no_bind(struct socket *sock, struct sockaddr *saddr, int len)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_connect(struct socket *sock, struct sockaddr *saddr,
+ int len, int flags)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_socketpair(struct socket *sock1, struct socket *sock2)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_accept(struct socket *sock, struct socket *newsock, int flags)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_getname(struct socket *sock, struct sockaddr *saddr,
+ int *len, int peer)
+{
+ return -EOPNOTSUPP;
+}
+
+unsigned int sock_no_poll(struct file * file, struct socket *sock, poll_table *pt)
+{
+ return 0;
+}
+
+int sock_no_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_listen(struct socket *sock, int backlog)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_shutdown(struct socket *sock, int how)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
+ size_t len)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
+ size_t len, int flags)
+{
+ return -EOPNOTSUPP;
+}
+
+int sock_no_mmap(struct file *file, struct socket *sock, struct vm_area_struct *vma)
+{
+ /* Mirror missing mmap method error code */
+ return -ENODEV;
+}
+
+ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags)
+{
+ ssize_t res;
+ struct msghdr msg = {.msg_flags = flags};
+ struct kvec iov;
+ char *kaddr = kmap(page);
+ iov.iov_base = kaddr + offset;
+ iov.iov_len = size;
+ res = kernel_sendmsg(sock, &msg, &iov, 1, size);
+ kunmap(page);
+ return res;
+}
+
+/*
+ * Default Socket Callbacks
+ */
+
+static void sock_def_wakeup(struct sock *sk)
+{
+ read_lock(&sk->sk_callback_lock);
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up_interruptible_all(sk->sk_sleep);
+ read_unlock(&sk->sk_callback_lock);
+}
+
+static void sock_def_error_report(struct sock *sk)
+{
+ read_lock(&sk->sk_callback_lock);
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up_interruptible(sk->sk_sleep);
+ sk_wake_async(sk,0,POLL_ERR);
+ read_unlock(&sk->sk_callback_lock);
+}
+
+static void sock_def_readable(struct sock *sk, int len)
+{
+ read_lock(&sk->sk_callback_lock);
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up_interruptible(sk->sk_sleep);
+ sk_wake_async(sk,1,POLL_IN);
+ read_unlock(&sk->sk_callback_lock);
+}
+
+static void sock_def_write_space(struct sock *sk)
+{
+ read_lock(&sk->sk_callback_lock);
+
+ /* Do not wake up a writer until he can make "significant"
+ * progress. --DaveM
+ */
+ if((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) {
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up_interruptible(sk->sk_sleep);
+
+ /* Should agree with poll, otherwise some programs break */
+ if (sock_writeable(sk))
+ sk_wake_async(sk, 2, POLL_OUT);
+ }
+
+ read_unlock(&sk->sk_callback_lock);
+}
+
+static void sock_def_destruct(struct sock *sk)
+{
+ if (sk->sk_protinfo)
+ kfree(sk->sk_protinfo);
+}
+
+void sk_send_sigurg(struct sock *sk)
+{
+ if (sk->sk_socket && sk->sk_socket->file)
+ if (send_sigurg(&sk->sk_socket->file->f_owner))
+ sk_wake_async(sk, 3, POLL_PRI);
+}
+
+void sk_reset_timer(struct sock *sk, struct timer_list* timer,
+ unsigned long expires)
+{
+ if (!mod_timer(timer, expires))
+ sock_hold(sk);
+}
+
+EXPORT_SYMBOL(sk_reset_timer);
+
+void sk_stop_timer(struct sock *sk, struct timer_list* timer)
+{
+ if (timer_pending(timer) && del_timer(timer))
+ __sock_put(sk);
+}
+
+EXPORT_SYMBOL(sk_stop_timer);
+
+void sock_init_data(struct socket *sock, struct sock *sk)
+{
+ skb_queue_head_init(&sk->sk_receive_queue);
+ skb_queue_head_init(&sk->sk_write_queue);
+ skb_queue_head_init(&sk->sk_error_queue);
+
+ sk->sk_send_head = NULL;
+
+ init_timer(&sk->sk_timer);
+
+ sk->sk_allocation = GFP_KERNEL;
+ sk->sk_rcvbuf = sysctl_rmem_default;
+ sk->sk_sndbuf = sysctl_wmem_default;
+ sk->sk_state = TCP_CLOSE;
+ sk->sk_socket = sock;
+
+ sock_set_flag(sk, SOCK_ZAPPED);
+
+ if(sock)
+ {
+ sk->sk_type = sock->type;
+ sk->sk_sleep = &sock->wait;
+ sock->sk = sk;
+ } else
+ sk->sk_sleep = NULL;
+
+ rwlock_init(&sk->sk_dst_lock);
+ rwlock_init(&sk->sk_callback_lock);
+
+ sk->sk_state_change = sock_def_wakeup;
+ sk->sk_data_ready = sock_def_readable;
+ sk->sk_write_space = sock_def_write_space;
+ sk->sk_error_report = sock_def_error_report;
+ sk->sk_destruct = sock_def_destruct;
+
+ sk->sk_sndmsg_page = NULL;
+ sk->sk_sndmsg_off = 0;
+
+ sk->sk_peercred.pid = 0;
+ sk->sk_peercred.uid = -1;
+ sk->sk_peercred.gid = -1;
+ sk->sk_write_pending = 0;
+ sk->sk_rcvlowat = 1;
+ sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT;
+ sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
+
+ sk->sk_stamp.tv_sec = -1L;
+ sk->sk_stamp.tv_usec = -1L;
+
+ atomic_set(&sk->sk_refcnt, 1);
+}
+
+void fastcall lock_sock(struct sock *sk)
+{
+ might_sleep();
+ spin_lock_bh(&(sk->sk_lock.slock));
+ if (sk->sk_lock.owner)
+ __lock_sock(sk);
+ sk->sk_lock.owner = (void *)1;
+ spin_unlock_bh(&(sk->sk_lock.slock));
+}
+
+EXPORT_SYMBOL(lock_sock);
+
+void fastcall release_sock(struct sock *sk)
+{
+ spin_lock_bh(&(sk->sk_lock.slock));
+ if (sk->sk_backlog.tail)
+ __release_sock(sk);
+ sk->sk_lock.owner = NULL;
+ if (waitqueue_active(&(sk->sk_lock.wq)))
+ wake_up(&(sk->sk_lock.wq));
+ spin_unlock_bh(&(sk->sk_lock.slock));
+}
+EXPORT_SYMBOL(release_sock);
+
+int sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
+{
+ if (!sock_flag(sk, SOCK_TIMESTAMP))
+ sock_enable_timestamp(sk);
+ if (sk->sk_stamp.tv_sec == -1)
+ return -ENOENT;
+ if (sk->sk_stamp.tv_sec == 0)
+ do_gettimeofday(&sk->sk_stamp);
+ return copy_to_user(userstamp, &sk->sk_stamp, sizeof(struct timeval)) ?
+ -EFAULT : 0;
+}
+EXPORT_SYMBOL(sock_get_timestamp);
+
+void sock_enable_timestamp(struct sock *sk)
+{
+ if (!sock_flag(sk, SOCK_TIMESTAMP)) {
+ sock_set_flag(sk, SOCK_TIMESTAMP);
+ net_enable_timestamp();
+ }
+}
+EXPORT_SYMBOL(sock_enable_timestamp);
+
+/*
+ * Get a socket option on an socket.
+ *
+ * FIX: POSIX 1003.1g is very ambiguous here. It states that
+ * asynchronous errors should be reported by getsockopt. We assume
+ * this means if you specify SO_ERROR (otherwise whats the point of it).
+ */
+int sock_common_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+
+ return sk->sk_prot->getsockopt(sk, level, optname, optval, optlen);
+}
+
+EXPORT_SYMBOL(sock_common_getsockopt);
+
+int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t size, int flags)
+{
+ struct sock *sk = sock->sk;
+ int addr_len = 0;
+ int err;
+
+ err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT,
+ flags & ~MSG_DONTWAIT, &addr_len);
+ if (err >= 0)
+ msg->msg_namelen = addr_len;
+ return err;
+}
+
+EXPORT_SYMBOL(sock_common_recvmsg);
+
+/*
+ * Set socket options on an inet socket.
+ */
+int sock_common_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct sock *sk = sock->sk;
+
+ return sk->sk_prot->setsockopt(sk, level, optname, optval, optlen);
+}
+
+EXPORT_SYMBOL(sock_common_setsockopt);
+
+void sk_common_release(struct sock *sk)
+{
+ if (sk->sk_prot->destroy)
+ sk->sk_prot->destroy(sk);
+
+ /*
+ * Observation: when sock_common_release is called, processes have
+ * no access to socket. But net still has.
+ * Step one, detach it from networking:
+ *
+ * A. Remove from hash tables.
+ */
+
+ sk->sk_prot->unhash(sk);
+
+ /*
+ * In this point socket cannot receive new packets, but it is possible
+ * that some packets are in flight because some CPU runs receiver and
+ * did hash table lookup before we unhashed socket. They will achieve
+ * receive queue and will be purged by socket destructor.
+ *
+ * Also we still have packets pending on receive queue and probably,
+ * our own packets waiting in device queues. sock_destroy will drain
+ * receive queue, but transmitted packets will delay socket destruction
+ * until the last reference will be released.
+ */
+
+ sock_orphan(sk);
+
+ xfrm_sk_free_policy(sk);
+
+#ifdef INET_REFCNT_DEBUG
+ if (atomic_read(&sk->sk_refcnt) != 1)
+ printk(KERN_DEBUG "Destruction of the socket %p delayed, c=%d\n",
+ sk, atomic_read(&sk->sk_refcnt));
+#endif
+ sock_put(sk);
+}
+
+EXPORT_SYMBOL(sk_common_release);
+
+static DEFINE_RWLOCK(proto_list_lock);
+static LIST_HEAD(proto_list);
+
+int proto_register(struct proto *prot, int alloc_slab)
+{
+ int rc = -ENOBUFS;
+
+ write_lock(&proto_list_lock);
+
+ if (alloc_slab) {
+ prot->slab = kmem_cache_create(prot->name, prot->obj_size, 0,
+ SLAB_HWCACHE_ALIGN, NULL, NULL);
+
+ if (prot->slab == NULL) {
+ printk(KERN_CRIT "%s: Can't create sock SLAB cache!\n",
+ prot->name);
+ goto out_unlock;
+ }
+ }
+
+ list_add(&prot->node, &proto_list);
+ rc = 0;
+out_unlock:
+ write_unlock(&proto_list_lock);
+ return rc;
+}
+
+EXPORT_SYMBOL(proto_register);
+
+void proto_unregister(struct proto *prot)
+{
+ write_lock(&proto_list_lock);
+
+ if (prot->slab != NULL) {
+ kmem_cache_destroy(prot->slab);
+ prot->slab = NULL;
+ }
+
+ list_del(&prot->node);
+ write_unlock(&proto_list_lock);
+}
+
+EXPORT_SYMBOL(proto_unregister);
+
+#ifdef CONFIG_PROC_FS
+static inline struct proto *__proto_head(void)
+{
+ return list_entry(proto_list.next, struct proto, node);
+}
+
+static inline struct proto *proto_head(void)
+{
+ return list_empty(&proto_list) ? NULL : __proto_head();
+}
+
+static inline struct proto *proto_next(struct proto *proto)
+{
+ return proto->node.next == &proto_list ? NULL :
+ list_entry(proto->node.next, struct proto, node);
+}
+
+static inline struct proto *proto_get_idx(loff_t pos)
+{
+ struct proto *proto;
+ loff_t i = 0;
+
+ list_for_each_entry(proto, &proto_list, node)
+ if (i++ == pos)
+ goto out;
+
+ proto = NULL;
+out:
+ return proto;
+}
+
+static void *proto_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ read_lock(&proto_list_lock);
+ return *pos ? proto_get_idx(*pos - 1) : SEQ_START_TOKEN;
+}
+
+static void *proto_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ ++*pos;
+ return v == SEQ_START_TOKEN ? proto_head() : proto_next(v);
+}
+
+static void proto_seq_stop(struct seq_file *seq, void *v)
+{
+ read_unlock(&proto_list_lock);
+}
+
+static char proto_method_implemented(const void *method)
+{
+ return method == NULL ? 'n' : 'y';
+}
+
+static void proto_seq_printf(struct seq_file *seq, struct proto *proto)
+{
+ seq_printf(seq, "%-9s %4u %6d %6d %-3s %6u %-3s %-10s "
+ "%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n",
+ proto->name,
+ proto->obj_size,
+ proto->sockets_allocated != NULL ? atomic_read(proto->sockets_allocated) : -1,
+ proto->memory_allocated != NULL ? atomic_read(proto->memory_allocated) : -1,
+ proto->memory_pressure != NULL ? *proto->memory_pressure ? "yes" : "no" : "NI",
+ proto->max_header,
+ proto->slab == NULL ? "no" : "yes",
+ module_name(proto->owner),
+ proto_method_implemented(proto->close),
+ proto_method_implemented(proto->connect),
+ proto_method_implemented(proto->disconnect),
+ proto_method_implemented(proto->accept),
+ proto_method_implemented(proto->ioctl),
+ proto_method_implemented(proto->init),
+ proto_method_implemented(proto->destroy),
+ proto_method_implemented(proto->shutdown),
+ proto_method_implemented(proto->setsockopt),
+ proto_method_implemented(proto->getsockopt),
+ proto_method_implemented(proto->sendmsg),
+ proto_method_implemented(proto->recvmsg),
+ proto_method_implemented(proto->sendpage),
+ proto_method_implemented(proto->bind),
+ proto_method_implemented(proto->backlog_rcv),
+ proto_method_implemented(proto->hash),
+ proto_method_implemented(proto->unhash),
+ proto_method_implemented(proto->get_port),
+ proto_method_implemented(proto->enter_memory_pressure));
+}
+
+static int proto_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN)
+ seq_printf(seq, "%-9s %-4s %-8s %-6s %-5s %-7s %-4s %-10s %s",
+ "protocol",
+ "size",
+ "sockets",
+ "memory",
+ "press",
+ "maxhdr",
+ "slab",
+ "module",
+ "cl co di ac io in de sh ss gs se re sp bi br ha uh gp em\n");
+ else
+ proto_seq_printf(seq, v);
+ return 0;
+}
+
+static struct seq_operations proto_seq_ops = {
+ .start = proto_seq_start,
+ .next = proto_seq_next,
+ .stop = proto_seq_stop,
+ .show = proto_seq_show,
+};
+
+static int proto_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &proto_seq_ops);
+}
+
+static struct file_operations proto_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = proto_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int __init proto_init(void)
+{
+ /* register /proc/net/protocols */
+ return proc_net_fops_create("protocols", S_IRUGO, &proto_seq_fops) == NULL ? -ENOBUFS : 0;
+}
+
+subsys_initcall(proto_init);
+
+#endif /* PROC_FS */
+
+EXPORT_SYMBOL(sk_alloc);
+EXPORT_SYMBOL(sk_free);
+EXPORT_SYMBOL(sk_send_sigurg);
+EXPORT_SYMBOL(sock_alloc_send_skb);
+EXPORT_SYMBOL(sock_init_data);
+EXPORT_SYMBOL(sock_kfree_s);
+EXPORT_SYMBOL(sock_kmalloc);
+EXPORT_SYMBOL(sock_no_accept);
+EXPORT_SYMBOL(sock_no_bind);
+EXPORT_SYMBOL(sock_no_connect);
+EXPORT_SYMBOL(sock_no_getname);
+EXPORT_SYMBOL(sock_no_getsockopt);
+EXPORT_SYMBOL(sock_no_ioctl);
+EXPORT_SYMBOL(sock_no_listen);
+EXPORT_SYMBOL(sock_no_mmap);
+EXPORT_SYMBOL(sock_no_poll);
+EXPORT_SYMBOL(sock_no_recvmsg);
+EXPORT_SYMBOL(sock_no_sendmsg);
+EXPORT_SYMBOL(sock_no_sendpage);
+EXPORT_SYMBOL(sock_no_setsockopt);
+EXPORT_SYMBOL(sock_no_shutdown);
+EXPORT_SYMBOL(sock_no_socketpair);
+EXPORT_SYMBOL(sock_rfree);
+EXPORT_SYMBOL(sock_setsockopt);
+EXPORT_SYMBOL(sock_wfree);
+EXPORT_SYMBOL(sock_wmalloc);
+EXPORT_SYMBOL(sock_i_uid);
+EXPORT_SYMBOL(sock_i_ino);
+#ifdef CONFIG_SYSCTL
+EXPORT_SYMBOL(sysctl_optmem_max);
+EXPORT_SYMBOL(sysctl_rmem_max);
+EXPORT_SYMBOL(sysctl_wmem_max);
+#endif
diff --git a/net/core/stream.c b/net/core/stream.c
new file mode 100644
index 0000000..1e27a57
--- /dev/null
+++ b/net/core/stream.c
@@ -0,0 +1,287 @@
+/*
+ * SUCS NET3:
+ *
+ * Generic stream handling routines. These are generic for most
+ * protocols. Even IP. Tonight 8-).
+ * This is used because TCP, LLC (others too) layer all have mostly
+ * identical sendmsg() and recvmsg() code.
+ * So we (will) share it here.
+ *
+ * Authors: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * (from old tcp.c code)
+ * Alan Cox <alan@redhat.com> (Borrowed comments 8-))
+ */
+
+#include <linux/module.h>
+#include <linux/net.h>
+#include <linux/signal.h>
+#include <linux/tcp.h>
+#include <linux/wait.h>
+#include <net/sock.h>
+
+/**
+ * sk_stream_write_space - stream socket write_space callback.
+ * sk - socket
+ *
+ * FIXME: write proper description
+ */
+void sk_stream_write_space(struct sock *sk)
+{
+ struct socket *sock = sk->sk_socket;
+
+ if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) && sock) {
+ clear_bit(SOCK_NOSPACE, &sock->flags);
+
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up_interruptible(sk->sk_sleep);
+ if (sock->fasync_list && !(sk->sk_shutdown & SEND_SHUTDOWN))
+ sock_wake_async(sock, 2, POLL_OUT);
+ }
+}
+
+EXPORT_SYMBOL(sk_stream_write_space);
+
+/**
+ * sk_stream_wait_connect - Wait for a socket to get into the connected state
+ * @sk - sock to wait on
+ * @timeo_p - for how long to wait
+ *
+ * Must be called with the socket locked.
+ */
+int sk_stream_wait_connect(struct sock *sk, long *timeo_p)
+{
+ struct task_struct *tsk = current;
+ DEFINE_WAIT(wait);
+
+ while (1) {
+ if (sk->sk_err)
+ return sock_error(sk);
+ if ((1 << sk->sk_state) & ~(TCPF_SYN_SENT | TCPF_SYN_RECV))
+ return -EPIPE;
+ if (!*timeo_p)
+ return -EAGAIN;
+ if (signal_pending(tsk))
+ return sock_intr_errno(*timeo_p);
+
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sk->sk_write_pending++;
+ if (sk_wait_event(sk, timeo_p,
+ !((1 << sk->sk_state) &
+ ~(TCPF_ESTABLISHED | TCPF_CLOSE_WAIT))))
+ break;
+ finish_wait(sk->sk_sleep, &wait);
+ sk->sk_write_pending--;
+ }
+ return 0;
+}
+
+EXPORT_SYMBOL(sk_stream_wait_connect);
+
+/**
+ * sk_stream_closing - Return 1 if we still have things to send in our buffers.
+ * @sk - socket to verify
+ */
+static inline int sk_stream_closing(struct sock *sk)
+{
+ return (1 << sk->sk_state) &
+ (TCPF_FIN_WAIT1 | TCPF_CLOSING | TCPF_LAST_ACK);
+}
+
+void sk_stream_wait_close(struct sock *sk, long timeout)
+{
+ if (timeout) {
+ DEFINE_WAIT(wait);
+
+ do {
+ prepare_to_wait(sk->sk_sleep, &wait,
+ TASK_INTERRUPTIBLE);
+ if (sk_wait_event(sk, &timeout, !sk_stream_closing(sk)))
+ break;
+ } while (!signal_pending(current) && timeout);
+
+ finish_wait(sk->sk_sleep, &wait);
+ }
+}
+
+EXPORT_SYMBOL(sk_stream_wait_close);
+
+/**
+ * sk_stream_wait_memory - Wait for more memory for a socket
+ * @sk - socket to wait for memory
+ * @timeo_p - for how long
+ */
+int sk_stream_wait_memory(struct sock *sk, long *timeo_p)
+{
+ int err = 0;
+ long vm_wait = 0;
+ long current_timeo = *timeo_p;
+ DEFINE_WAIT(wait);
+
+ if (sk_stream_memory_free(sk))
+ current_timeo = vm_wait = (net_random() % (HZ / 5)) + 2;
+
+ while (1) {
+ set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
+
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+
+ if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN))
+ goto do_error;
+ if (!*timeo_p)
+ goto do_nonblock;
+ if (signal_pending(current))
+ goto do_interrupted;
+ clear_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags);
+ if (sk_stream_memory_free(sk) && !vm_wait)
+ break;
+
+ set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
+ sk->sk_write_pending++;
+ sk_wait_event(sk, ¤t_timeo, sk_stream_memory_free(sk) &&
+ vm_wait);
+ sk->sk_write_pending--;
+
+ if (vm_wait) {
+ vm_wait -= current_timeo;
+ current_timeo = *timeo_p;
+ if (current_timeo != MAX_SCHEDULE_TIMEOUT &&
+ (current_timeo -= vm_wait) < 0)
+ current_timeo = 0;
+ vm_wait = 0;
+ }
+ *timeo_p = current_timeo;
+ }
+out:
+ finish_wait(sk->sk_sleep, &wait);
+ return err;
+
+do_error:
+ err = -EPIPE;
+ goto out;
+do_nonblock:
+ err = -EAGAIN;
+ goto out;
+do_interrupted:
+ err = sock_intr_errno(*timeo_p);
+ goto out;
+}
+
+EXPORT_SYMBOL(sk_stream_wait_memory);
+
+void sk_stream_rfree(struct sk_buff *skb)
+{
+ struct sock *sk = skb->sk;
+
+ atomic_sub(skb->truesize, &sk->sk_rmem_alloc);
+ sk->sk_forward_alloc += skb->truesize;
+}
+
+EXPORT_SYMBOL(sk_stream_rfree);
+
+int sk_stream_error(struct sock *sk, int flags, int err)
+{
+ if (err == -EPIPE)
+ err = sock_error(sk) ? : -EPIPE;
+ if (err == -EPIPE && !(flags & MSG_NOSIGNAL))
+ send_sig(SIGPIPE, current, 0);
+ return err;
+}
+
+EXPORT_SYMBOL(sk_stream_error);
+
+void __sk_stream_mem_reclaim(struct sock *sk)
+{
+ if (sk->sk_forward_alloc >= SK_STREAM_MEM_QUANTUM) {
+ atomic_sub(sk->sk_forward_alloc / SK_STREAM_MEM_QUANTUM,
+ sk->sk_prot->memory_allocated);
+ sk->sk_forward_alloc &= SK_STREAM_MEM_QUANTUM - 1;
+ if (*sk->sk_prot->memory_pressure &&
+ (atomic_read(sk->sk_prot->memory_allocated) <
+ sk->sk_prot->sysctl_mem[0]))
+ *sk->sk_prot->memory_pressure = 0;
+ }
+}
+
+EXPORT_SYMBOL(__sk_stream_mem_reclaim);
+
+int sk_stream_mem_schedule(struct sock *sk, int size, int kind)
+{
+ int amt = sk_stream_pages(size);
+
+ sk->sk_forward_alloc += amt * SK_STREAM_MEM_QUANTUM;
+ atomic_add(amt, sk->sk_prot->memory_allocated);
+
+ /* Under limit. */
+ if (atomic_read(sk->sk_prot->memory_allocated) < sk->sk_prot->sysctl_mem[0]) {
+ if (*sk->sk_prot->memory_pressure)
+ *sk->sk_prot->memory_pressure = 0;
+ return 1;
+ }
+
+ /* Over hard limit. */
+ if (atomic_read(sk->sk_prot->memory_allocated) > sk->sk_prot->sysctl_mem[2]) {
+ sk->sk_prot->enter_memory_pressure();
+ goto suppress_allocation;
+ }
+
+ /* Under pressure. */
+ if (atomic_read(sk->sk_prot->memory_allocated) > sk->sk_prot->sysctl_mem[1])
+ sk->sk_prot->enter_memory_pressure();
+
+ if (kind) {
+ if (atomic_read(&sk->sk_rmem_alloc) < sk->sk_prot->sysctl_rmem[0])
+ return 1;
+ } else if (sk->sk_wmem_queued < sk->sk_prot->sysctl_wmem[0])
+ return 1;
+
+ if (!*sk->sk_prot->memory_pressure ||
+ sk->sk_prot->sysctl_mem[2] > atomic_read(sk->sk_prot->sockets_allocated) *
+ sk_stream_pages(sk->sk_wmem_queued +
+ atomic_read(&sk->sk_rmem_alloc) +
+ sk->sk_forward_alloc))
+ return 1;
+
+suppress_allocation:
+
+ if (!kind) {
+ sk_stream_moderate_sndbuf(sk);
+
+ /* Fail only if socket is _under_ its sndbuf.
+ * In this case we cannot block, so that we have to fail.
+ */
+ if (sk->sk_wmem_queued + size >= sk->sk_sndbuf)
+ return 1;
+ }
+
+ /* Alas. Undo changes. */
+ sk->sk_forward_alloc -= amt * SK_STREAM_MEM_QUANTUM;
+ atomic_sub(amt, sk->sk_prot->memory_allocated);
+ return 0;
+}
+
+EXPORT_SYMBOL(sk_stream_mem_schedule);
+
+void sk_stream_kill_queues(struct sock *sk)
+{
+ /* First the read buffer. */
+ __skb_queue_purge(&sk->sk_receive_queue);
+
+ /* Next, the error queue. */
+ __skb_queue_purge(&sk->sk_error_queue);
+
+ /* Next, the write queue. */
+ BUG_TRAP(skb_queue_empty(&sk->sk_write_queue));
+
+ /* Account for returned memory. */
+ sk_stream_mem_reclaim(sk);
+
+ BUG_TRAP(!sk->sk_wmem_queued);
+ BUG_TRAP(!sk->sk_forward_alloc);
+
+ /* It is _impossible_ for the backlog to contain anything
+ * when we get here. All user references to this socket
+ * have gone away, only the net layer knows can touch it.
+ */
+}
+
+EXPORT_SYMBOL(sk_stream_kill_queues);
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
new file mode 100644
index 0000000..c8be646c
--- /dev/null
+++ b/net/core/sysctl_net_core.c
@@ -0,0 +1,182 @@
+/* -*- linux-c -*-
+ * sysctl_net_core.c: sysctl interface to net core subsystem.
+ *
+ * Begun April 1, 1996, Mike Shaver.
+ * Added /proc/sys/net/core directory entry (empty =) ). [MS]
+ */
+
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/config.h>
+#include <linux/module.h>
+
+#ifdef CONFIG_SYSCTL
+
+extern int netdev_max_backlog;
+extern int weight_p;
+extern int no_cong_thresh;
+extern int no_cong;
+extern int lo_cong;
+extern int mod_cong;
+extern int netdev_fastroute;
+extern int net_msg_cost;
+extern int net_msg_burst;
+
+extern __u32 sysctl_wmem_max;
+extern __u32 sysctl_rmem_max;
+extern __u32 sysctl_wmem_default;
+extern __u32 sysctl_rmem_default;
+
+extern int sysctl_core_destroy_delay;
+extern int sysctl_optmem_max;
+extern int sysctl_somaxconn;
+
+#ifdef CONFIG_NET_DIVERT
+extern char sysctl_divert_version[];
+#endif /* CONFIG_NET_DIVERT */
+
+/*
+ * This strdup() is used for creating copies of network
+ * device names to be handed over to sysctl.
+ */
+
+char *net_sysctl_strdup(const char *s)
+{
+ char *rv = kmalloc(strlen(s)+1, GFP_KERNEL);
+ if (rv)
+ strcpy(rv, s);
+ return rv;
+}
+
+ctl_table core_table[] = {
+#ifdef CONFIG_NET
+ {
+ .ctl_name = NET_CORE_WMEM_MAX,
+ .procname = "wmem_max",
+ .data = &sysctl_wmem_max,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_RMEM_MAX,
+ .procname = "rmem_max",
+ .data = &sysctl_rmem_max,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_WMEM_DEFAULT,
+ .procname = "wmem_default",
+ .data = &sysctl_wmem_default,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_RMEM_DEFAULT,
+ .procname = "rmem_default",
+ .data = &sysctl_rmem_default,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_DEV_WEIGHT,
+ .procname = "dev_weight",
+ .data = &weight_p,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_MAX_BACKLOG,
+ .procname = "netdev_max_backlog",
+ .data = &netdev_max_backlog,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_NO_CONG_THRESH,
+ .procname = "no_cong_thresh",
+ .data = &no_cong_thresh,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_NO_CONG,
+ .procname = "no_cong",
+ .data = &no_cong,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_LO_CONG,
+ .procname = "lo_cong",
+ .data = &lo_cong,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_MOD_CONG,
+ .procname = "mod_cong",
+ .data = &mod_cong,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ {
+ .ctl_name = NET_CORE_MSG_COST,
+ .procname = "message_cost",
+ .data = &net_msg_cost,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = NET_CORE_MSG_BURST,
+ .procname = "message_burst",
+ .data = &net_msg_burst,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = NET_CORE_OPTMEM_MAX,
+ .procname = "optmem_max",
+ .data = &sysctl_optmem_max,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+#ifdef CONFIG_NET_DIVERT
+ {
+ .ctl_name = NET_CORE_DIVERT_VERSION,
+ .procname = "divert_version",
+ .data = (void *)sysctl_divert_version,
+ .maxlen = 32,
+ .mode = 0444,
+ .proc_handler = &proc_dostring
+ },
+#endif /* CONFIG_NET_DIVERT */
+#endif /* CONFIG_NET */
+ {
+ .ctl_name = NET_CORE_SOMAXCONN,
+ .procname = "somaxconn",
+ .data = &sysctl_somaxconn,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+ { .ctl_name = 0 }
+};
+
+EXPORT_SYMBOL(net_sysctl_strdup);
+
+#endif
diff --git a/net/core/utils.c b/net/core/utils.c
new file mode 100644
index 0000000..e11a865
--- /dev/null
+++ b/net/core/utils.c
@@ -0,0 +1,155 @@
+/*
+ * Generic address resultion entity
+ *
+ * Authors:
+ * net_random Alan Cox
+ * net_ratelimit Andy Kleen
+ *
+ * Created by Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/random.h>
+#include <linux/percpu.h>
+#include <linux/init.h>
+
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+
+/*
+ This is a maximally equidistributed combined Tausworthe generator
+ based on code from GNU Scientific Library 1.5 (30 Jun 2004)
+
+ x_n = (s1_n ^ s2_n ^ s3_n)
+
+ s1_{n+1} = (((s1_n & 4294967294) <<12) ^ (((s1_n <<13) ^ s1_n) >>19))
+ s2_{n+1} = (((s2_n & 4294967288) << 4) ^ (((s2_n << 2) ^ s2_n) >>25))
+ s3_{n+1} = (((s3_n & 4294967280) <<17) ^ (((s3_n << 3) ^ s3_n) >>11))
+
+ The period of this generator is about 2^88.
+
+ From: P. L'Ecuyer, "Maximally Equidistributed Combined Tausworthe
+ Generators", Mathematics of Computation, 65, 213 (1996), 203--213.
+
+ This is available on the net from L'Ecuyer's home page,
+
+ http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps
+ ftp://ftp.iro.umontreal.ca/pub/simulation/lecuyer/papers/tausme.ps
+
+ There is an erratum in the paper "Tables of Maximally
+ Equidistributed Combined LFSR Generators", Mathematics of
+ Computation, 68, 225 (1999), 261--269:
+ http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps
+
+ ... the k_j most significant bits of z_j must be non-
+ zero, for each j. (Note: this restriction also applies to the
+ computer code given in [4], but was mistakenly not mentioned in
+ that paper.)
+
+ This affects the seeding procedure by imposing the requirement
+ s1 > 1, s2 > 7, s3 > 15.
+
+*/
+struct nrnd_state {
+ u32 s1, s2, s3;
+};
+
+static DEFINE_PER_CPU(struct nrnd_state, net_rand_state);
+
+static u32 __net_random(struct nrnd_state *state)
+{
+#define TAUSWORTHE(s,a,b,c,d) ((s&c)<<d) ^ (((s <<a) ^ s)>>b)
+
+ state->s1 = TAUSWORTHE(state->s1, 13, 19, 4294967294UL, 12);
+ state->s2 = TAUSWORTHE(state->s2, 2, 25, 4294967288UL, 4);
+ state->s3 = TAUSWORTHE(state->s3, 3, 11, 4294967280UL, 17);
+
+ return (state->s1 ^ state->s2 ^ state->s3);
+}
+
+static void __net_srandom(struct nrnd_state *state, unsigned long s)
+{
+ if (s == 0)
+ s = 1; /* default seed is 1 */
+
+#define LCG(n) (69069 * n)
+ state->s1 = LCG(s);
+ state->s2 = LCG(state->s1);
+ state->s3 = LCG(state->s2);
+
+ /* "warm it up" */
+ __net_random(state);
+ __net_random(state);
+ __net_random(state);
+ __net_random(state);
+ __net_random(state);
+ __net_random(state);
+}
+
+
+unsigned long net_random(void)
+{
+ unsigned long r;
+ struct nrnd_state *state = &get_cpu_var(net_rand_state);
+ r = __net_random(state);
+ put_cpu_var(state);
+ return r;
+}
+
+
+void net_srandom(unsigned long entropy)
+{
+ struct nrnd_state *state = &get_cpu_var(net_rand_state);
+ __net_srandom(state, state->s1^entropy);
+ put_cpu_var(state);
+}
+
+void __init net_random_init(void)
+{
+ int i;
+
+ for (i = 0; i < NR_CPUS; i++) {
+ struct nrnd_state *state = &per_cpu(net_rand_state,i);
+ __net_srandom(state, i+jiffies);
+ }
+}
+
+static int net_random_reseed(void)
+{
+ int i;
+ unsigned long seed[NR_CPUS];
+
+ get_random_bytes(seed, sizeof(seed));
+ for (i = 0; i < NR_CPUS; i++) {
+ struct nrnd_state *state = &per_cpu(net_rand_state,i);
+ __net_srandom(state, seed[i]);
+ }
+ return 0;
+}
+late_initcall(net_random_reseed);
+
+int net_msg_cost = 5*HZ;
+int net_msg_burst = 10;
+
+/*
+ * All net warning printk()s should be guarded by this function.
+ */
+int net_ratelimit(void)
+{
+ return __printk_ratelimit(net_msg_cost, net_msg_burst);
+}
+
+EXPORT_SYMBOL(net_random);
+EXPORT_SYMBOL(net_ratelimit);
+EXPORT_SYMBOL(net_srandom);
diff --git a/net/core/wireless.c b/net/core/wireless.c
new file mode 100644
index 0000000..750cc5d
--- /dev/null
+++ b/net/core/wireless.c
@@ -0,0 +1,1459 @@
+/*
+ * This file implement the Wireless Extensions APIs.
+ *
+ * Authors : Jean Tourrilhes - HPL - <jt@hpl.hp.com>
+ * Copyright (c) 1997-2004 Jean Tourrilhes, All Rights Reserved.
+ *
+ * (As all part of the Linux kernel, this file is GPL)
+ */
+
+/************************** DOCUMENTATION **************************/
+/*
+ * API definition :
+ * --------------
+ * See <linux/wireless.h> for details of the APIs and the rest.
+ *
+ * History :
+ * -------
+ *
+ * v1 - 5.12.01 - Jean II
+ * o Created this file.
+ *
+ * v2 - 13.12.01 - Jean II
+ * o Move /proc/net/wireless stuff from net/core/dev.c to here
+ * o Make Wireless Extension IOCTLs go through here
+ * o Added iw_handler handling ;-)
+ * o Added standard ioctl description
+ * o Initial dumb commit strategy based on orinoco.c
+ *
+ * v3 - 19.12.01 - Jean II
+ * o Make sure we don't go out of standard_ioctl[] in ioctl_standard_call
+ * o Add event dispatcher function
+ * o Add event description
+ * o Propagate events as rtnetlink IFLA_WIRELESS option
+ * o Generate event on selected SET requests
+ *
+ * v4 - 18.04.02 - Jean II
+ * o Fix stupid off by one in iw_ioctl_description : IW_ESSID_MAX_SIZE + 1
+ *
+ * v5 - 21.06.02 - Jean II
+ * o Add IW_PRIV_TYPE_ADDR in priv_type_size (+cleanup)
+ * o Reshuffle IW_HEADER_TYPE_XXX to map IW_PRIV_TYPE_XXX changes
+ * o Add IWEVCUSTOM for driver specific event/scanning token
+ * o Turn on WE_STRICT_WRITE by default + kernel warning
+ * o Fix WE_STRICT_WRITE in ioctl_export_private() (32 => iw_num)
+ * o Fix off-by-one in test (extra_size <= IFNAMSIZ)
+ *
+ * v6 - 9.01.03 - Jean II
+ * o Add common spy support : iw_handler_set_spy(), wireless_spy_update()
+ * o Add enhanced spy support : iw_handler_set_thrspy() and event.
+ * o Add WIRELESS_EXT version display in /proc/net/wireless
+ *
+ * v6 - 18.06.04 - Jean II
+ * o Change get_spydata() method for added safety
+ * o Remove spy #ifdef, they are always on -> cleaner code
+ * o Allow any size GET request if user specifies length > max
+ * and if request has IW_DESCR_FLAG_NOMAX flag or is SIOCGIWPRIV
+ * o Start migrating get_wireless_stats to struct iw_handler_def
+ * o Add wmb() in iw_handler_set_spy() for non-coherent archs/cpus
+ * Based on patch from Pavel Roskin <proski@gnu.org> :
+ * o Fix kernel data leak to user space in private handler handling
+ */
+
+/***************************** INCLUDES *****************************/
+
+#include <linux/config.h> /* Not needed ??? */
+#include <linux/module.h>
+#include <linux/types.h> /* off_t */
+#include <linux/netdevice.h> /* struct ifreq, dev_get_by_name() */
+#include <linux/proc_fs.h>
+#include <linux/rtnetlink.h> /* rtnetlink stuff */
+#include <linux/seq_file.h>
+#include <linux/init.h> /* for __init */
+#include <linux/if_arp.h> /* ARPHRD_ETHER */
+
+#include <linux/wireless.h> /* Pretty obvious */
+#include <net/iw_handler.h> /* New driver API */
+
+#include <asm/uaccess.h> /* copy_to_user() */
+
+/**************************** CONSTANTS ****************************/
+
+/* Debugging stuff */
+#undef WE_IOCTL_DEBUG /* Debug IOCTL API */
+#undef WE_EVENT_DEBUG /* Debug Event dispatcher */
+#undef WE_SPY_DEBUG /* Debug enhanced spy support */
+
+/* Options */
+#define WE_EVENT_NETLINK /* Propagate events using rtnetlink */
+#define WE_SET_EVENT /* Generate an event on some set commands */
+
+/************************* GLOBAL VARIABLES *************************/
+/*
+ * You should not use global variables, because of re-entrancy.
+ * On our case, it's only const, so it's OK...
+ */
+/*
+ * Meta-data about all the standard Wireless Extension request we
+ * know about.
+ */
+static const struct iw_ioctl_description standard_ioctl[] = {
+ [SIOCSIWCOMMIT - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_NULL,
+ },
+ [SIOCGIWNAME - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_CHAR,
+ .flags = IW_DESCR_FLAG_DUMP,
+ },
+ [SIOCSIWNWID - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ .flags = IW_DESCR_FLAG_EVENT,
+ },
+ [SIOCGIWNWID - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ .flags = IW_DESCR_FLAG_DUMP,
+ },
+ [SIOCSIWFREQ - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_FREQ,
+ .flags = IW_DESCR_FLAG_EVENT,
+ },
+ [SIOCGIWFREQ - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_FREQ,
+ .flags = IW_DESCR_FLAG_DUMP,
+ },
+ [SIOCSIWMODE - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_UINT,
+ .flags = IW_DESCR_FLAG_EVENT,
+ },
+ [SIOCGIWMODE - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_UINT,
+ .flags = IW_DESCR_FLAG_DUMP,
+ },
+ [SIOCSIWSENS - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCGIWSENS - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCSIWRANGE - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_NULL,
+ },
+ [SIOCGIWRANGE - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = sizeof(struct iw_range),
+ .flags = IW_DESCR_FLAG_DUMP,
+ },
+ [SIOCSIWPRIV - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_NULL,
+ },
+ [SIOCGIWPRIV - SIOCIWFIRST] = { /* (handled directly by us) */
+ .header_type = IW_HEADER_TYPE_NULL,
+ },
+ [SIOCSIWSTATS - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_NULL,
+ },
+ [SIOCGIWSTATS - SIOCIWFIRST] = { /* (handled directly by us) */
+ .header_type = IW_HEADER_TYPE_NULL,
+ .flags = IW_DESCR_FLAG_DUMP,
+ },
+ [SIOCSIWSPY - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = sizeof(struct sockaddr),
+ .max_tokens = IW_MAX_SPY,
+ },
+ [SIOCGIWSPY - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = sizeof(struct sockaddr) +
+ sizeof(struct iw_quality),
+ .max_tokens = IW_MAX_SPY,
+ },
+ [SIOCSIWTHRSPY - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = sizeof(struct iw_thrspy),
+ .min_tokens = 1,
+ .max_tokens = 1,
+ },
+ [SIOCGIWTHRSPY - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = sizeof(struct iw_thrspy),
+ .min_tokens = 1,
+ .max_tokens = 1,
+ },
+ [SIOCSIWAP - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_ADDR,
+ },
+ [SIOCGIWAP - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_ADDR,
+ .flags = IW_DESCR_FLAG_DUMP,
+ },
+ [SIOCGIWAPLIST - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = sizeof(struct sockaddr) +
+ sizeof(struct iw_quality),
+ .max_tokens = IW_MAX_AP,
+ .flags = IW_DESCR_FLAG_NOMAX,
+ },
+ [SIOCSIWSCAN - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCGIWSCAN - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = IW_SCAN_MAX_DATA,
+ .flags = IW_DESCR_FLAG_NOMAX,
+ },
+ [SIOCSIWESSID - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = IW_ESSID_MAX_SIZE + 1,
+ .flags = IW_DESCR_FLAG_EVENT,
+ },
+ [SIOCGIWESSID - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = IW_ESSID_MAX_SIZE + 1,
+ .flags = IW_DESCR_FLAG_DUMP,
+ },
+ [SIOCSIWNICKN - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = IW_ESSID_MAX_SIZE + 1,
+ },
+ [SIOCGIWNICKN - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = IW_ESSID_MAX_SIZE + 1,
+ },
+ [SIOCSIWRATE - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCGIWRATE - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCSIWRTS - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCGIWRTS - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCSIWFRAG - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCGIWFRAG - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCSIWTXPOW - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCGIWTXPOW - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCSIWRETRY - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCGIWRETRY - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCSIWENCODE - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = IW_ENCODING_TOKEN_MAX,
+ .flags = IW_DESCR_FLAG_EVENT | IW_DESCR_FLAG_RESTRICT,
+ },
+ [SIOCGIWENCODE - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = IW_ENCODING_TOKEN_MAX,
+ .flags = IW_DESCR_FLAG_DUMP | IW_DESCR_FLAG_RESTRICT,
+ },
+ [SIOCSIWPOWER - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+ [SIOCGIWPOWER - SIOCIWFIRST] = {
+ .header_type = IW_HEADER_TYPE_PARAM,
+ },
+};
+static const int standard_ioctl_num = (sizeof(standard_ioctl) /
+ sizeof(struct iw_ioctl_description));
+
+/*
+ * Meta-data about all the additional standard Wireless Extension events
+ * we know about.
+ */
+static const struct iw_ioctl_description standard_event[] = {
+ [IWEVTXDROP - IWEVFIRST] = {
+ .header_type = IW_HEADER_TYPE_ADDR,
+ },
+ [IWEVQUAL - IWEVFIRST] = {
+ .header_type = IW_HEADER_TYPE_QUAL,
+ },
+ [IWEVCUSTOM - IWEVFIRST] = {
+ .header_type = IW_HEADER_TYPE_POINT,
+ .token_size = 1,
+ .max_tokens = IW_CUSTOM_MAX,
+ },
+ [IWEVREGISTERED - IWEVFIRST] = {
+ .header_type = IW_HEADER_TYPE_ADDR,
+ },
+ [IWEVEXPIRED - IWEVFIRST] = {
+ .header_type = IW_HEADER_TYPE_ADDR,
+ },
+};
+static const int standard_event_num = (sizeof(standard_event) /
+ sizeof(struct iw_ioctl_description));
+
+/* Size (in bytes) of the various private data types */
+static const char iw_priv_type_size[] = {
+ 0, /* IW_PRIV_TYPE_NONE */
+ 1, /* IW_PRIV_TYPE_BYTE */
+ 1, /* IW_PRIV_TYPE_CHAR */
+ 0, /* Not defined */
+ sizeof(__u32), /* IW_PRIV_TYPE_INT */
+ sizeof(struct iw_freq), /* IW_PRIV_TYPE_FLOAT */
+ sizeof(struct sockaddr), /* IW_PRIV_TYPE_ADDR */
+ 0, /* Not defined */
+};
+
+/* Size (in bytes) of various events */
+static const int event_type_size[] = {
+ IW_EV_LCP_LEN, /* IW_HEADER_TYPE_NULL */
+ 0,
+ IW_EV_CHAR_LEN, /* IW_HEADER_TYPE_CHAR */
+ 0,
+ IW_EV_UINT_LEN, /* IW_HEADER_TYPE_UINT */
+ IW_EV_FREQ_LEN, /* IW_HEADER_TYPE_FREQ */
+ IW_EV_ADDR_LEN, /* IW_HEADER_TYPE_ADDR */
+ 0,
+ IW_EV_POINT_LEN, /* Without variable payload */
+ IW_EV_PARAM_LEN, /* IW_HEADER_TYPE_PARAM */
+ IW_EV_QUAL_LEN, /* IW_HEADER_TYPE_QUAL */
+};
+
+/************************ COMMON SUBROUTINES ************************/
+/*
+ * Stuff that may be used in various place or doesn't fit in one
+ * of the section below.
+ */
+
+/* ---------------------------------------------------------------- */
+/*
+ * Return the driver handler associated with a specific Wireless Extension.
+ * Called from various place, so make sure it remains efficient.
+ */
+static inline iw_handler get_handler(struct net_device *dev,
+ unsigned int cmd)
+{
+ /* Don't "optimise" the following variable, it will crash */
+ unsigned int index; /* *MUST* be unsigned */
+
+ /* Check if we have some wireless handlers defined */
+ if(dev->wireless_handlers == NULL)
+ return NULL;
+
+ /* Try as a standard command */
+ index = cmd - SIOCIWFIRST;
+ if(index < dev->wireless_handlers->num_standard)
+ return dev->wireless_handlers->standard[index];
+
+ /* Try as a private command */
+ index = cmd - SIOCIWFIRSTPRIV;
+ if(index < dev->wireless_handlers->num_private)
+ return dev->wireless_handlers->private[index];
+
+ /* Not found */
+ return NULL;
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Get statistics out of the driver
+ */
+static inline struct iw_statistics *get_wireless_stats(struct net_device *dev)
+{
+ /* New location */
+ if((dev->wireless_handlers != NULL) &&
+ (dev->wireless_handlers->get_wireless_stats != NULL))
+ return dev->wireless_handlers->get_wireless_stats(dev);
+
+ /* Old location, will be phased out in next WE */
+ return (dev->get_wireless_stats ?
+ dev->get_wireless_stats(dev) :
+ (struct iw_statistics *) NULL);
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Call the commit handler in the driver
+ * (if exist and if conditions are right)
+ *
+ * Note : our current commit strategy is currently pretty dumb,
+ * but we will be able to improve on that...
+ * The goal is to try to agreagate as many changes as possible
+ * before doing the commit. Drivers that will define a commit handler
+ * are usually those that need a reset after changing parameters, so
+ * we want to minimise the number of reset.
+ * A cool idea is to use a timer : at each "set" command, we re-set the
+ * timer, when the timer eventually fires, we call the driver.
+ * Hopefully, more on that later.
+ *
+ * Also, I'm waiting to see how many people will complain about the
+ * netif_running(dev) test. I'm open on that one...
+ * Hopefully, the driver will remember to do a commit in "open()" ;-)
+ */
+static inline int call_commit_handler(struct net_device * dev)
+{
+ if((netif_running(dev)) &&
+ (dev->wireless_handlers->standard[0] != NULL)) {
+ /* Call the commit handler on the driver */
+ return dev->wireless_handlers->standard[0](dev, NULL,
+ NULL, NULL);
+ } else
+ return 0; /* Command completed successfully */
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Calculate size of private arguments
+ */
+static inline int get_priv_size(__u16 args)
+{
+ int num = args & IW_PRIV_SIZE_MASK;
+ int type = (args & IW_PRIV_TYPE_MASK) >> 12;
+
+ return num * iw_priv_type_size[type];
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Re-calculate the size of private arguments
+ */
+static inline int adjust_priv_size(__u16 args,
+ union iwreq_data * wrqu)
+{
+ int num = wrqu->data.length;
+ int max = args & IW_PRIV_SIZE_MASK;
+ int type = (args & IW_PRIV_TYPE_MASK) >> 12;
+
+ /* Make sure the driver doesn't goof up */
+ if (max < num)
+ num = max;
+
+ return num * iw_priv_type_size[type];
+}
+
+
+/******************** /proc/net/wireless SUPPORT ********************/
+/*
+ * The /proc/net/wireless file is a human readable user-space interface
+ * exporting various wireless specific statistics from the wireless devices.
+ * This is the most popular part of the Wireless Extensions ;-)
+ *
+ * This interface is a pure clone of /proc/net/dev (in net/core/dev.c).
+ * The content of the file is basically the content of "struct iw_statistics".
+ */
+
+#ifdef CONFIG_PROC_FS
+
+/* ---------------------------------------------------------------- */
+/*
+ * Print one entry (line) of /proc/net/wireless
+ */
+static __inline__ void wireless_seq_printf_stats(struct seq_file *seq,
+ struct net_device *dev)
+{
+ /* Get stats from the driver */
+ struct iw_statistics *stats = get_wireless_stats(dev);
+
+ if (stats) {
+ seq_printf(seq, "%6s: %04x %3d%c %3d%c %3d%c %6d %6d %6d "
+ "%6d %6d %6d\n",
+ dev->name, stats->status, stats->qual.qual,
+ stats->qual.updated & IW_QUAL_QUAL_UPDATED
+ ? '.' : ' ',
+ ((__u8) stats->qual.level),
+ stats->qual.updated & IW_QUAL_LEVEL_UPDATED
+ ? '.' : ' ',
+ ((__u8) stats->qual.noise),
+ stats->qual.updated & IW_QUAL_NOISE_UPDATED
+ ? '.' : ' ',
+ stats->discard.nwid, stats->discard.code,
+ stats->discard.fragment, stats->discard.retries,
+ stats->discard.misc, stats->miss.beacon);
+ stats->qual.updated = 0;
+ }
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Print info for /proc/net/wireless (print all entries)
+ */
+static int wireless_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == SEQ_START_TOKEN)
+ seq_printf(seq, "Inter-| sta-| Quality | Discarded "
+ "packets | Missed | WE\n"
+ " face | tus | link level noise | nwid "
+ "crypt frag retry misc | beacon | %d\n",
+ WIRELESS_EXT);
+ else
+ wireless_seq_printf_stats(seq, v);
+ return 0;
+}
+
+extern void *dev_seq_start(struct seq_file *seq, loff_t *pos);
+extern void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
+extern void dev_seq_stop(struct seq_file *seq, void *v);
+
+static struct seq_operations wireless_seq_ops = {
+ .start = dev_seq_start,
+ .next = dev_seq_next,
+ .stop = dev_seq_stop,
+ .show = wireless_seq_show,
+};
+
+static int wireless_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &wireless_seq_ops);
+}
+
+static struct file_operations wireless_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = wireless_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+int __init wireless_proc_init(void)
+{
+ if (!proc_net_fops_create("wireless", S_IRUGO, &wireless_seq_fops))
+ return -ENOMEM;
+
+ return 0;
+}
+#endif /* CONFIG_PROC_FS */
+
+/************************** IOCTL SUPPORT **************************/
+/*
+ * The original user space API to configure all those Wireless Extensions
+ * is through IOCTLs.
+ * In there, we check if we need to call the new driver API (iw_handler)
+ * or just call the driver ioctl handler.
+ */
+
+/* ---------------------------------------------------------------- */
+/*
+ * Allow programatic access to /proc/net/wireless even if /proc
+ * doesn't exist... Also more efficient...
+ */
+static inline int dev_iwstats(struct net_device *dev, struct ifreq *ifr)
+{
+ /* Get stats from the driver */
+ struct iw_statistics *stats;
+
+ stats = get_wireless_stats(dev);
+ if (stats != (struct iw_statistics *) NULL) {
+ struct iwreq * wrq = (struct iwreq *)ifr;
+
+ /* Copy statistics to the user buffer */
+ if(copy_to_user(wrq->u.data.pointer, stats,
+ sizeof(struct iw_statistics)))
+ return -EFAULT;
+
+ /* Check if we need to clear the update flag */
+ if(wrq->u.data.flags != 0)
+ stats->qual.updated = 0;
+ return 0;
+ } else
+ return -EOPNOTSUPP;
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Export the driver private handler definition
+ * They will be picked up by tools like iwpriv...
+ */
+static inline int ioctl_export_private(struct net_device * dev,
+ struct ifreq * ifr)
+{
+ struct iwreq * iwr = (struct iwreq *) ifr;
+
+ /* Check if the driver has something to export */
+ if((dev->wireless_handlers->num_private_args == 0) ||
+ (dev->wireless_handlers->private_args == NULL))
+ return -EOPNOTSUPP;
+
+ /* Check NULL pointer */
+ if(iwr->u.data.pointer == NULL)
+ return -EFAULT;
+
+ /* Check if there is enough buffer up there */
+ if(iwr->u.data.length < dev->wireless_handlers->num_private_args) {
+ /* User space can't know in advance how large the buffer
+ * needs to be. Give it a hint, so that we can support
+ * any size buffer we want somewhat efficiently... */
+ iwr->u.data.length = dev->wireless_handlers->num_private_args;
+ return -E2BIG;
+ }
+
+ /* Set the number of available ioctls. */
+ iwr->u.data.length = dev->wireless_handlers->num_private_args;
+
+ /* Copy structure to the user buffer. */
+ if (copy_to_user(iwr->u.data.pointer,
+ dev->wireless_handlers->private_args,
+ sizeof(struct iw_priv_args) * iwr->u.data.length))
+ return -EFAULT;
+
+ return 0;
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Wrapper to call a standard Wireless Extension handler.
+ * We do various checks and also take care of moving data between
+ * user space and kernel space.
+ */
+static inline int ioctl_standard_call(struct net_device * dev,
+ struct ifreq * ifr,
+ unsigned int cmd,
+ iw_handler handler)
+{
+ struct iwreq * iwr = (struct iwreq *) ifr;
+ const struct iw_ioctl_description * descr;
+ struct iw_request_info info;
+ int ret = -EINVAL;
+
+ /* Get the description of the IOCTL */
+ if((cmd - SIOCIWFIRST) >= standard_ioctl_num)
+ return -EOPNOTSUPP;
+ descr = &(standard_ioctl[cmd - SIOCIWFIRST]);
+
+#ifdef WE_IOCTL_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Found standard handler for 0x%04X\n",
+ ifr->ifr_name, cmd);
+ printk(KERN_DEBUG "%s (WE) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
+#endif /* WE_IOCTL_DEBUG */
+
+ /* Prepare the call */
+ info.cmd = cmd;
+ info.flags = 0;
+
+ /* Check if we have a pointer to user space data or not */
+ if(descr->header_type != IW_HEADER_TYPE_POINT) {
+
+ /* No extra arguments. Trivial to handle */
+ ret = handler(dev, &info, &(iwr->u), NULL);
+
+#ifdef WE_SET_EVENT
+ /* Generate an event to notify listeners of the change */
+ if((descr->flags & IW_DESCR_FLAG_EVENT) &&
+ ((ret == 0) || (ret == -EIWCOMMIT)))
+ wireless_send_event(dev, cmd, &(iwr->u), NULL);
+#endif /* WE_SET_EVENT */
+ } else {
+ char * extra;
+ int extra_size;
+ int user_length = 0;
+ int err;
+
+ /* Calculate space needed by arguments. Always allocate
+ * for max space. Easier, and won't last long... */
+ extra_size = descr->max_tokens * descr->token_size;
+
+ /* Check what user space is giving us */
+ if(IW_IS_SET(cmd)) {
+ /* Check NULL pointer */
+ if((iwr->u.data.pointer == NULL) &&
+ (iwr->u.data.length != 0))
+ return -EFAULT;
+ /* Check if number of token fits within bounds */
+ if(iwr->u.data.length > descr->max_tokens)
+ return -E2BIG;
+ if(iwr->u.data.length < descr->min_tokens)
+ return -EINVAL;
+ } else {
+ /* Check NULL pointer */
+ if(iwr->u.data.pointer == NULL)
+ return -EFAULT;
+ /* Save user space buffer size for checking */
+ user_length = iwr->u.data.length;
+
+ /* Don't check if user_length > max to allow forward
+ * compatibility. The test user_length < min is
+ * implied by the test at the end. */
+
+ /* Support for very large requests */
+ if((descr->flags & IW_DESCR_FLAG_NOMAX) &&
+ (user_length > descr->max_tokens)) {
+ /* Allow userspace to GET more than max so
+ * we can support any size GET requests.
+ * There is still a limit : -ENOMEM. */
+ extra_size = user_length * descr->token_size;
+ /* Note : user_length is originally a __u16,
+ * and token_size is controlled by us,
+ * so extra_size won't get negative and
+ * won't overflow... */
+ }
+ }
+
+#ifdef WE_IOCTL_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
+ dev->name, extra_size);
+#endif /* WE_IOCTL_DEBUG */
+
+ /* Create the kernel buffer */
+ extra = kmalloc(extra_size, GFP_KERNEL);
+ if (extra == NULL) {
+ return -ENOMEM;
+ }
+
+ /* If it is a SET, get all the extra data in here */
+ if(IW_IS_SET(cmd) && (iwr->u.data.length != 0)) {
+ err = copy_from_user(extra, iwr->u.data.pointer,
+ iwr->u.data.length *
+ descr->token_size);
+ if (err) {
+ kfree(extra);
+ return -EFAULT;
+ }
+#ifdef WE_IOCTL_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Got %d bytes\n",
+ dev->name,
+ iwr->u.data.length * descr->token_size);
+#endif /* WE_IOCTL_DEBUG */
+ }
+
+ /* Call the handler */
+ ret = handler(dev, &info, &(iwr->u), extra);
+
+ /* If we have something to return to the user */
+ if (!ret && IW_IS_GET(cmd)) {
+ /* Check if there is enough buffer up there */
+ if(user_length < iwr->u.data.length) {
+ kfree(extra);
+ return -E2BIG;
+ }
+
+ err = copy_to_user(iwr->u.data.pointer, extra,
+ iwr->u.data.length *
+ descr->token_size);
+ if (err)
+ ret = -EFAULT;
+#ifdef WE_IOCTL_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Wrote %d bytes\n",
+ dev->name,
+ iwr->u.data.length * descr->token_size);
+#endif /* WE_IOCTL_DEBUG */
+ }
+
+#ifdef WE_SET_EVENT
+ /* Generate an event to notify listeners of the change */
+ if((descr->flags & IW_DESCR_FLAG_EVENT) &&
+ ((ret == 0) || (ret == -EIWCOMMIT))) {
+ if(descr->flags & IW_DESCR_FLAG_RESTRICT)
+ /* If the event is restricted, don't
+ * export the payload */
+ wireless_send_event(dev, cmd, &(iwr->u), NULL);
+ else
+ wireless_send_event(dev, cmd, &(iwr->u),
+ extra);
+ }
+#endif /* WE_SET_EVENT */
+
+ /* Cleanup - I told you it wasn't that long ;-) */
+ kfree(extra);
+ }
+
+ /* Call commit handler if needed and defined */
+ if(ret == -EIWCOMMIT)
+ ret = call_commit_handler(dev);
+
+ /* Here, we will generate the appropriate event if needed */
+
+ return ret;
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Wrapper to call a private Wireless Extension handler.
+ * We do various checks and also take care of moving data between
+ * user space and kernel space.
+ * It's not as nice and slimline as the standard wrapper. The cause
+ * is struct iw_priv_args, which was not really designed for the
+ * job we are going here.
+ *
+ * IMPORTANT : This function prevent to set and get data on the same
+ * IOCTL and enforce the SET/GET convention. Not doing it would be
+ * far too hairy...
+ * If you need to set and get data at the same time, please don't use
+ * a iw_handler but process it in your ioctl handler (i.e. use the
+ * old driver API).
+ */
+static inline int ioctl_private_call(struct net_device * dev,
+ struct ifreq * ifr,
+ unsigned int cmd,
+ iw_handler handler)
+{
+ struct iwreq * iwr = (struct iwreq *) ifr;
+ const struct iw_priv_args * descr = NULL;
+ struct iw_request_info info;
+ int extra_size = 0;
+ int i;
+ int ret = -EINVAL;
+
+ /* Get the description of the IOCTL */
+ for(i = 0; i < dev->wireless_handlers->num_private_args; i++)
+ if(cmd == dev->wireless_handlers->private_args[i].cmd) {
+ descr = &(dev->wireless_handlers->private_args[i]);
+ break;
+ }
+
+#ifdef WE_IOCTL_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Found private handler for 0x%04X\n",
+ ifr->ifr_name, cmd);
+ if(descr) {
+ printk(KERN_DEBUG "%s (WE) : Name %s, set %X, get %X\n",
+ dev->name, descr->name,
+ descr->set_args, descr->get_args);
+ }
+#endif /* WE_IOCTL_DEBUG */
+
+ /* Compute the size of the set/get arguments */
+ if(descr != NULL) {
+ if(IW_IS_SET(cmd)) {
+ int offset = 0; /* For sub-ioctls */
+ /* Check for sub-ioctl handler */
+ if(descr->name[0] == '\0')
+ /* Reserve one int for sub-ioctl index */
+ offset = sizeof(__u32);
+
+ /* Size of set arguments */
+ extra_size = get_priv_size(descr->set_args);
+
+ /* Does it fits in iwr ? */
+ if((descr->set_args & IW_PRIV_SIZE_FIXED) &&
+ ((extra_size + offset) <= IFNAMSIZ))
+ extra_size = 0;
+ } else {
+ /* Size of get arguments */
+ extra_size = get_priv_size(descr->get_args);
+
+ /* Does it fits in iwr ? */
+ if((descr->get_args & IW_PRIV_SIZE_FIXED) &&
+ (extra_size <= IFNAMSIZ))
+ extra_size = 0;
+ }
+ }
+
+ /* Prepare the call */
+ info.cmd = cmd;
+ info.flags = 0;
+
+ /* Check if we have a pointer to user space data or not. */
+ if(extra_size == 0) {
+ /* No extra arguments. Trivial to handle */
+ ret = handler(dev, &info, &(iwr->u), (char *) &(iwr->u));
+ } else {
+ char * extra;
+ int err;
+
+ /* Check what user space is giving us */
+ if(IW_IS_SET(cmd)) {
+ /* Check NULL pointer */
+ if((iwr->u.data.pointer == NULL) &&
+ (iwr->u.data.length != 0))
+ return -EFAULT;
+
+ /* Does it fits within bounds ? */
+ if(iwr->u.data.length > (descr->set_args &
+ IW_PRIV_SIZE_MASK))
+ return -E2BIG;
+ } else {
+ /* Check NULL pointer */
+ if(iwr->u.data.pointer == NULL)
+ return -EFAULT;
+ }
+
+#ifdef WE_IOCTL_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Malloc %d bytes\n",
+ dev->name, extra_size);
+#endif /* WE_IOCTL_DEBUG */
+
+ /* Always allocate for max space. Easier, and won't last
+ * long... */
+ extra = kmalloc(extra_size, GFP_KERNEL);
+ if (extra == NULL) {
+ return -ENOMEM;
+ }
+
+ /* If it is a SET, get all the extra data in here */
+ if(IW_IS_SET(cmd) && (iwr->u.data.length != 0)) {
+ err = copy_from_user(extra, iwr->u.data.pointer,
+ extra_size);
+ if (err) {
+ kfree(extra);
+ return -EFAULT;
+ }
+#ifdef WE_IOCTL_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Got %d elem\n",
+ dev->name, iwr->u.data.length);
+#endif /* WE_IOCTL_DEBUG */
+ }
+
+ /* Call the handler */
+ ret = handler(dev, &info, &(iwr->u), extra);
+
+ /* If we have something to return to the user */
+ if (!ret && IW_IS_GET(cmd)) {
+
+ /* Adjust for the actual length if it's variable,
+ * avoid leaking kernel bits outside. */
+ if (!(descr->get_args & IW_PRIV_SIZE_FIXED)) {
+ extra_size = adjust_priv_size(descr->get_args,
+ &(iwr->u));
+ }
+
+ err = copy_to_user(iwr->u.data.pointer, extra,
+ extra_size);
+ if (err)
+ ret = -EFAULT;
+#ifdef WE_IOCTL_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Wrote %d elem\n",
+ dev->name, iwr->u.data.length);
+#endif /* WE_IOCTL_DEBUG */
+ }
+
+ /* Cleanup - I told you it wasn't that long ;-) */
+ kfree(extra);
+ }
+
+
+ /* Call commit handler if needed and defined */
+ if(ret == -EIWCOMMIT)
+ ret = call_commit_handler(dev);
+
+ return ret;
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Main IOCTl dispatcher. Called from the main networking code
+ * (dev_ioctl() in net/core/dev.c).
+ * Check the type of IOCTL and call the appropriate wrapper...
+ */
+int wireless_process_ioctl(struct ifreq *ifr, unsigned int cmd)
+{
+ struct net_device *dev;
+ iw_handler handler;
+
+ /* Permissions are already checked in dev_ioctl() before calling us.
+ * The copy_to/from_user() of ifr is also dealt with in there */
+
+ /* Make sure the device exist */
+ if ((dev = __dev_get_by_name(ifr->ifr_name)) == NULL)
+ return -ENODEV;
+
+ /* A bunch of special cases, then the generic case...
+ * Note that 'cmd' is already filtered in dev_ioctl() with
+ * (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) */
+ switch(cmd)
+ {
+ case SIOCGIWSTATS:
+ /* Get Wireless Stats */
+ return dev_iwstats(dev, ifr);
+
+ case SIOCGIWPRIV:
+ /* Check if we have some wireless handlers defined */
+ if(dev->wireless_handlers != NULL) {
+ /* We export to user space the definition of
+ * the private handler ourselves */
+ return ioctl_export_private(dev, ifr);
+ }
+ // ## Fall-through for old API ##
+ default:
+ /* Generic IOCTL */
+ /* Basic check */
+ if (!netif_device_present(dev))
+ return -ENODEV;
+ /* New driver API : try to find the handler */
+ handler = get_handler(dev, cmd);
+ if(handler != NULL) {
+ /* Standard and private are not the same */
+ if(cmd < SIOCIWFIRSTPRIV)
+ return ioctl_standard_call(dev,
+ ifr,
+ cmd,
+ handler);
+ else
+ return ioctl_private_call(dev,
+ ifr,
+ cmd,
+ handler);
+ }
+ /* Old driver API : call driver ioctl handler */
+ if (dev->do_ioctl) {
+ return dev->do_ioctl(dev, ifr, cmd);
+ }
+ return -EOPNOTSUPP;
+ }
+ /* Not reached */
+ return -EINVAL;
+}
+
+/************************* EVENT PROCESSING *************************/
+/*
+ * Process events generated by the wireless layer or the driver.
+ * Most often, the event will be propagated through rtnetlink
+ */
+
+#ifdef WE_EVENT_NETLINK
+/* "rtnl" is defined in net/core/rtnetlink.c, but we need it here.
+ * It is declared in <linux/rtnetlink.h> */
+
+/* ---------------------------------------------------------------- */
+/*
+ * Fill a rtnetlink message with our event data.
+ * Note that we propage only the specified event and don't dump the
+ * current wireless config. Dumping the wireless config is far too
+ * expensive (for each parameter, the driver need to query the hardware).
+ */
+static inline int rtnetlink_fill_iwinfo(struct sk_buff * skb,
+ struct net_device * dev,
+ int type,
+ char * event,
+ int event_len)
+{
+ struct ifinfomsg *r;
+ struct nlmsghdr *nlh;
+ unsigned char *b = skb->tail;
+
+ nlh = NLMSG_PUT(skb, 0, 0, type, sizeof(*r));
+ r = NLMSG_DATA(nlh);
+ r->ifi_family = AF_UNSPEC;
+ r->ifi_type = dev->type;
+ r->ifi_index = dev->ifindex;
+ r->ifi_flags = dev->flags;
+ r->ifi_change = 0; /* Wireless changes don't affect those flags */
+
+ /* Add the wireless events in the netlink packet */
+ RTA_PUT(skb, IFLA_WIRELESS,
+ event_len, event);
+
+ nlh->nlmsg_len = skb->tail - b;
+ return skb->len;
+
+nlmsg_failure:
+rtattr_failure:
+ skb_trim(skb, b - skb->data);
+ return -1;
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Create and broadcast and send it on the standard rtnetlink socket
+ * This is a pure clone rtmsg_ifinfo() in net/core/rtnetlink.c
+ * Andrzej Krzysztofowicz mandated that I used a IFLA_XXX field
+ * within a RTM_NEWLINK event.
+ */
+static inline void rtmsg_iwinfo(struct net_device * dev,
+ char * event,
+ int event_len)
+{
+ struct sk_buff *skb;
+ int size = NLMSG_GOODSIZE;
+
+ skb = alloc_skb(size, GFP_ATOMIC);
+ if (!skb)
+ return;
+
+ if (rtnetlink_fill_iwinfo(skb, dev, RTM_NEWLINK,
+ event, event_len) < 0) {
+ kfree_skb(skb);
+ return;
+ }
+ NETLINK_CB(skb).dst_groups = RTMGRP_LINK;
+ netlink_broadcast(rtnl, skb, 0, RTMGRP_LINK, GFP_ATOMIC);
+}
+#endif /* WE_EVENT_NETLINK */
+
+/* ---------------------------------------------------------------- */
+/*
+ * Main event dispatcher. Called from other parts and drivers.
+ * Send the event on the appropriate channels.
+ * May be called from interrupt context.
+ */
+void wireless_send_event(struct net_device * dev,
+ unsigned int cmd,
+ union iwreq_data * wrqu,
+ char * extra)
+{
+ const struct iw_ioctl_description * descr = NULL;
+ int extra_len = 0;
+ struct iw_event *event; /* Mallocated whole event */
+ int event_len; /* Its size */
+ int hdr_len; /* Size of the event header */
+ /* Don't "optimise" the following variable, it will crash */
+ unsigned cmd_index; /* *MUST* be unsigned */
+
+ /* Get the description of the IOCTL */
+ if(cmd <= SIOCIWLAST) {
+ cmd_index = cmd - SIOCIWFIRST;
+ if(cmd_index < standard_ioctl_num)
+ descr = &(standard_ioctl[cmd_index]);
+ } else {
+ cmd_index = cmd - IWEVFIRST;
+ if(cmd_index < standard_event_num)
+ descr = &(standard_event[cmd_index]);
+ }
+ /* Don't accept unknown events */
+ if(descr == NULL) {
+ /* Note : we don't return an error to the driver, because
+ * the driver would not know what to do about it. It can't
+ * return an error to the user, because the event is not
+ * initiated by a user request.
+ * The best the driver could do is to log an error message.
+ * We will do it ourselves instead...
+ */
+ printk(KERN_ERR "%s (WE) : Invalid/Unknown Wireless Event (0x%04X)\n",
+ dev->name, cmd);
+ return;
+ }
+#ifdef WE_EVENT_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Got event 0x%04X\n",
+ dev->name, cmd);
+ printk(KERN_DEBUG "%s (WE) : Header type : %d, Token type : %d, size : %d, token : %d\n", dev->name, descr->header_type, descr->token_type, descr->token_size, descr->max_tokens);
+#endif /* WE_EVENT_DEBUG */
+
+ /* Check extra parameters and set extra_len */
+ if(descr->header_type == IW_HEADER_TYPE_POINT) {
+ /* Check if number of token fits within bounds */
+ if(wrqu->data.length > descr->max_tokens) {
+ printk(KERN_ERR "%s (WE) : Wireless Event too big (%d)\n", dev->name, wrqu->data.length);
+ return;
+ }
+ if(wrqu->data.length < descr->min_tokens) {
+ printk(KERN_ERR "%s (WE) : Wireless Event too small (%d)\n", dev->name, wrqu->data.length);
+ return;
+ }
+ /* Calculate extra_len - extra is NULL for restricted events */
+ if(extra != NULL)
+ extra_len = wrqu->data.length * descr->token_size;
+#ifdef WE_EVENT_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Event 0x%04X, tokens %d, extra_len %d\n", dev->name, cmd, wrqu->data.length, extra_len);
+#endif /* WE_EVENT_DEBUG */
+ }
+
+ /* Total length of the event */
+ hdr_len = event_type_size[descr->header_type];
+ event_len = hdr_len + extra_len;
+
+#ifdef WE_EVENT_DEBUG
+ printk(KERN_DEBUG "%s (WE) : Event 0x%04X, hdr_len %d, event_len %d\n", dev->name, cmd, hdr_len, event_len);
+#endif /* WE_EVENT_DEBUG */
+
+ /* Create temporary buffer to hold the event */
+ event = kmalloc(event_len, GFP_ATOMIC);
+ if(event == NULL)
+ return;
+
+ /* Fill event */
+ event->len = event_len;
+ event->cmd = cmd;
+ memcpy(&event->u, wrqu, hdr_len - IW_EV_LCP_LEN);
+ if(extra != NULL)
+ memcpy(((char *) event) + hdr_len, extra, extra_len);
+
+#ifdef WE_EVENT_NETLINK
+ /* rtnetlink event channel */
+ rtmsg_iwinfo(dev, (char *) event, event_len);
+#endif /* WE_EVENT_NETLINK */
+
+ /* Cleanup */
+ kfree(event);
+
+ return; /* Always success, I guess ;-) */
+}
+
+/********************** ENHANCED IWSPY SUPPORT **********************/
+/*
+ * In the old days, the driver was handling spy support all by itself.
+ * Now, the driver can delegate this task to Wireless Extensions.
+ * It needs to use those standard spy iw_handler in struct iw_handler_def,
+ * push data to us via wireless_spy_update() and include struct iw_spy_data
+ * in its private part (and advertise it in iw_handler_def->spy_offset).
+ * One of the main advantage of centralising spy support here is that
+ * it becomes much easier to improve and extend it without having to touch
+ * the drivers. One example is the addition of the Spy-Threshold events.
+ */
+
+/* ---------------------------------------------------------------- */
+/*
+ * Return the pointer to the spy data in the driver.
+ * Because this is called on the Rx path via wireless_spy_update(),
+ * we want it to be efficient...
+ */
+static inline struct iw_spy_data * get_spydata(struct net_device *dev)
+{
+ /* This is the new way */
+ if(dev->wireless_data)
+ return(dev->wireless_data->spy_data);
+
+ /* This is the old way. Doesn't work for multi-headed drivers.
+ * It will be removed in the next version of WE. */
+ return (dev->priv + dev->wireless_handlers->spy_offset);
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Standard Wireless Handler : set Spy List
+ */
+int iw_handler_set_spy(struct net_device * dev,
+ struct iw_request_info * info,
+ union iwreq_data * wrqu,
+ char * extra)
+{
+ struct iw_spy_data * spydata = get_spydata(dev);
+ struct sockaddr * address = (struct sockaddr *) extra;
+
+ if(!dev->wireless_data)
+ /* Help user know that driver needs updating */
+ printk(KERN_DEBUG "%s (WE) : Driver using old/buggy spy support, please fix driver !\n",
+ dev->name);
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return -EOPNOTSUPP;
+
+ /* Disable spy collection while we copy the addresses.
+ * While we copy addresses, any call to wireless_spy_update()
+ * will NOP. This is OK, as anyway the addresses are changing. */
+ spydata->spy_number = 0;
+
+ /* We want to operate without locking, because wireless_spy_update()
+ * most likely will happen in the interrupt handler, and therefore
+ * have its own locking constraints and needs performance.
+ * The rtnl_lock() make sure we don't race with the other iw_handlers.
+ * This make sure wireless_spy_update() "see" that the spy list
+ * is temporarily disabled. */
+ wmb();
+
+ /* Are there are addresses to copy? */
+ if(wrqu->data.length > 0) {
+ int i;
+
+ /* Copy addresses */
+ for(i = 0; i < wrqu->data.length; i++)
+ memcpy(spydata->spy_address[i], address[i].sa_data,
+ ETH_ALEN);
+ /* Reset stats */
+ memset(spydata->spy_stat, 0,
+ sizeof(struct iw_quality) * IW_MAX_SPY);
+
+#ifdef WE_SPY_DEBUG
+ printk(KERN_DEBUG "iw_handler_set_spy() : offset %ld, spydata %p, num %d\n", dev->wireless_handlers->spy_offset, spydata, wrqu->data.length);
+ for (i = 0; i < wrqu->data.length; i++)
+ printk(KERN_DEBUG
+ "%02X:%02X:%02X:%02X:%02X:%02X \n",
+ spydata->spy_address[i][0],
+ spydata->spy_address[i][1],
+ spydata->spy_address[i][2],
+ spydata->spy_address[i][3],
+ spydata->spy_address[i][4],
+ spydata->spy_address[i][5]);
+#endif /* WE_SPY_DEBUG */
+ }
+
+ /* Make sure above is updated before re-enabling */
+ wmb();
+
+ /* Enable addresses */
+ spydata->spy_number = wrqu->data.length;
+
+ return 0;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Standard Wireless Handler : get Spy List
+ */
+int iw_handler_get_spy(struct net_device * dev,
+ struct iw_request_info * info,
+ union iwreq_data * wrqu,
+ char * extra)
+{
+ struct iw_spy_data * spydata = get_spydata(dev);
+ struct sockaddr * address = (struct sockaddr *) extra;
+ int i;
+
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return -EOPNOTSUPP;
+
+ wrqu->data.length = spydata->spy_number;
+
+ /* Copy addresses. */
+ for(i = 0; i < spydata->spy_number; i++) {
+ memcpy(address[i].sa_data, spydata->spy_address[i], ETH_ALEN);
+ address[i].sa_family = AF_UNIX;
+ }
+ /* Copy stats to the user buffer (just after). */
+ if(spydata->spy_number > 0)
+ memcpy(extra + (sizeof(struct sockaddr) *spydata->spy_number),
+ spydata->spy_stat,
+ sizeof(struct iw_quality) * spydata->spy_number);
+ /* Reset updated flags. */
+ for(i = 0; i < spydata->spy_number; i++)
+ spydata->spy_stat[i].updated = 0;
+ return 0;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Standard Wireless Handler : set spy threshold
+ */
+int iw_handler_set_thrspy(struct net_device * dev,
+ struct iw_request_info *info,
+ union iwreq_data * wrqu,
+ char * extra)
+{
+ struct iw_spy_data * spydata = get_spydata(dev);
+ struct iw_thrspy * threshold = (struct iw_thrspy *) extra;
+
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return -EOPNOTSUPP;
+
+ /* Just do it */
+ memcpy(&(spydata->spy_thr_low), &(threshold->low),
+ 2 * sizeof(struct iw_quality));
+
+ /* Clear flag */
+ memset(spydata->spy_thr_under, '\0', sizeof(spydata->spy_thr_under));
+
+#ifdef WE_SPY_DEBUG
+ printk(KERN_DEBUG "iw_handler_set_thrspy() : low %d ; high %d\n", spydata->spy_thr_low.level, spydata->spy_thr_high.level);
+#endif /* WE_SPY_DEBUG */
+
+ return 0;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Standard Wireless Handler : get spy threshold
+ */
+int iw_handler_get_thrspy(struct net_device * dev,
+ struct iw_request_info *info,
+ union iwreq_data * wrqu,
+ char * extra)
+{
+ struct iw_spy_data * spydata = get_spydata(dev);
+ struct iw_thrspy * threshold = (struct iw_thrspy *) extra;
+
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return -EOPNOTSUPP;
+
+ /* Just do it */
+ memcpy(&(threshold->low), &(spydata->spy_thr_low),
+ 2 * sizeof(struct iw_quality));
+
+ return 0;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Prepare and send a Spy Threshold event
+ */
+static void iw_send_thrspy_event(struct net_device * dev,
+ struct iw_spy_data * spydata,
+ unsigned char * address,
+ struct iw_quality * wstats)
+{
+ union iwreq_data wrqu;
+ struct iw_thrspy threshold;
+
+ /* Init */
+ wrqu.data.length = 1;
+ wrqu.data.flags = 0;
+ /* Copy address */
+ memcpy(threshold.addr.sa_data, address, ETH_ALEN);
+ threshold.addr.sa_family = ARPHRD_ETHER;
+ /* Copy stats */
+ memcpy(&(threshold.qual), wstats, sizeof(struct iw_quality));
+ /* Copy also thresholds */
+ memcpy(&(threshold.low), &(spydata->spy_thr_low),
+ 2 * sizeof(struct iw_quality));
+
+#ifdef WE_SPY_DEBUG
+ printk(KERN_DEBUG "iw_send_thrspy_event() : address %02X:%02X:%02X:%02X:%02X:%02X, level %d, up = %d\n",
+ threshold.addr.sa_data[0],
+ threshold.addr.sa_data[1],
+ threshold.addr.sa_data[2],
+ threshold.addr.sa_data[3],
+ threshold.addr.sa_data[4],
+ threshold.addr.sa_data[5], threshold.qual.level);
+#endif /* WE_SPY_DEBUG */
+
+ /* Send event to user space */
+ wireless_send_event(dev, SIOCGIWTHRSPY, &wrqu, (char *) &threshold);
+}
+
+/* ---------------------------------------------------------------- */
+/*
+ * Call for the driver to update the spy data.
+ * For now, the spy data is a simple array. As the size of the array is
+ * small, this is good enough. If we wanted to support larger number of
+ * spy addresses, we should use something more efficient...
+ */
+void wireless_spy_update(struct net_device * dev,
+ unsigned char * address,
+ struct iw_quality * wstats)
+{
+ struct iw_spy_data * spydata = get_spydata(dev);
+ int i;
+ int match = -1;
+
+ /* Make sure driver is not buggy or using the old API */
+ if(!spydata)
+ return;
+
+#ifdef WE_SPY_DEBUG
+ printk(KERN_DEBUG "wireless_spy_update() : offset %ld, spydata %p, address %02X:%02X:%02X:%02X:%02X:%02X\n", dev->wireless_handlers->spy_offset, spydata, address[0], address[1], address[2], address[3], address[4], address[5]);
+#endif /* WE_SPY_DEBUG */
+
+ /* Update all records that match */
+ for(i = 0; i < spydata->spy_number; i++)
+ if(!memcmp(address, spydata->spy_address[i], ETH_ALEN)) {
+ memcpy(&(spydata->spy_stat[i]), wstats,
+ sizeof(struct iw_quality));
+ match = i;
+ }
+
+ /* Generate an event if we cross the spy threshold.
+ * To avoid event storms, we have a simple hysteresis : we generate
+ * event only when we go under the low threshold or above the
+ * high threshold. */
+ if(match >= 0) {
+ if(spydata->spy_thr_under[match]) {
+ if(wstats->level > spydata->spy_thr_high.level) {
+ spydata->spy_thr_under[match] = 0;
+ iw_send_thrspy_event(dev, spydata,
+ address, wstats);
+ }
+ } else {
+ if(wstats->level < spydata->spy_thr_low.level) {
+ spydata->spy_thr_under[match] = 1;
+ iw_send_thrspy_event(dev, spydata,
+ address, wstats);
+ }
+ }
+ }
+}
+
+EXPORT_SYMBOL(iw_handler_get_spy);
+EXPORT_SYMBOL(iw_handler_get_thrspy);
+EXPORT_SYMBOL(iw_handler_set_spy);
+EXPORT_SYMBOL(iw_handler_set_thrspy);
+EXPORT_SYMBOL(wireless_send_event);
+EXPORT_SYMBOL(wireless_spy_update);