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/atm/svc.c b/net/atm/svc.c
new file mode 100644
index 0000000..02f5374
--- /dev/null
+++ b/net/atm/svc.c
@@ -0,0 +1,674 @@
+/* net/atm/svc.c - ATM SVC sockets */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/string.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/errno.h> /* error codes */
+#include <linux/kernel.h> /* printk */
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/sched.h> /* jiffies and HZ */
+#include <linux/fcntl.h> /* O_NONBLOCK */
+#include <linux/init.h>
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmsap.h>
+#include <linux/atmsvc.h>
+#include <linux/atmdev.h>
+#include <linux/bitops.h>
+#include <net/sock.h> /* for sock_no_* */
+#include <asm/uaccess.h>
+
+#include "resources.h"
+#include "common.h" /* common for PVCs and SVCs */
+#include "signaling.h"
+#include "addr.h"
+
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+static int svc_create(struct socket *sock,int protocol);
+
+
+/*
+ * Note: since all this is still nicely synchronized with the signaling demon,
+ * there's no need to protect sleep loops with clis. If signaling is
+ * moved into the kernel, that would change.
+ */
+
+
+static int svc_shutdown(struct socket *sock,int how)
+{
+ return 0;
+}
+
+
+static void svc_disconnect(struct atm_vcc *vcc)
+{
+ DEFINE_WAIT(wait);
+ struct sk_buff *skb;
+ struct sock *sk = sk_atm(vcc);
+
+ DPRINTK("svc_disconnect %p\n",vcc);
+ if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq(vcc,as_close,NULL,NULL,NULL);
+ while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ }
+ /* beware - socket is still in use by atmsigd until the last
+ as_indicate has been answered */
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ atm_return(vcc, skb->truesize);
+ DPRINTK("LISTEN REL\n");
+ sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0);
+ dev_kfree_skb(skb);
+ }
+ clear_bit(ATM_VF_REGIS, &vcc->flags);
+ /* ... may retry later */
+}
+
+
+static int svc_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+
+ if (sk) {
+ vcc = ATM_SD(sock);
+ DPRINTK("svc_release %p\n", vcc);
+ clear_bit(ATM_VF_READY, &vcc->flags);
+ /* VCC pointer is used as a reference, so we must not free it
+ (thereby subjecting it to re-use) before all pending connections
+ are closed */
+ svc_disconnect(vcc);
+ vcc_release(sock);
+ }
+ return 0;
+}
+
+
+static int svc_bind(struct socket *sock,struct sockaddr *sockaddr,
+ int sockaddr_len)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct sockaddr_atmsvc *addr;
+ struct atm_vcc *vcc;
+ int error;
+
+ if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
+ return -EINVAL;
+ lock_sock(sk);
+ if (sock->state == SS_CONNECTED) {
+ error = -EISCONN;
+ goto out;
+ }
+ if (sock->state != SS_UNCONNECTED) {
+ error = -EINVAL;
+ goto out;
+ }
+ vcc = ATM_SD(sock);
+ if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
+ error = -EINVAL;
+ goto out;
+ }
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ if (addr->sas_family != AF_ATMSVC) {
+ error = -EAFNOSUPPORT;
+ goto out;
+ }
+ clear_bit(ATM_VF_BOUND,&vcc->flags);
+ /* failing rebind will kill old binding */
+ /* @@@ check memory (de)allocation on rebind */
+ if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) {
+ error = -EBADFD;
+ goto out;
+ }
+ vcc->local = *addr;
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (!sk->sk_err)
+ set_bit(ATM_VF_BOUND,&vcc->flags);
+ error = -sk->sk_err;
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_connect(struct socket *sock,struct sockaddr *sockaddr,
+ int sockaddr_len,int flags)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct sockaddr_atmsvc *addr;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ DPRINTK("svc_connect %p\n",vcc);
+ lock_sock(sk);
+ if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
+ error = -EINVAL;
+ goto out;
+ }
+
+ switch (sock->state) {
+ default:
+ error = -EINVAL;
+ goto out;
+ case SS_CONNECTED:
+ error = -EISCONN;
+ goto out;
+ case SS_CONNECTING:
+ if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
+ error = -EALREADY;
+ goto out;
+ }
+ sock->state = SS_UNCONNECTED;
+ if (sk->sk_err) {
+ error = -sk->sk_err;
+ goto out;
+ }
+ break;
+ case SS_UNCONNECTED:
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ if (addr->sas_family != AF_ATMSVC) {
+ error = -EAFNOSUPPORT;
+ goto out;
+ }
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
+ error = -EBADFD;
+ goto out;
+ }
+ if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
+ vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (!vcc->qos.txtp.traffic_class &&
+ !vcc->qos.rxtp.traffic_class) {
+ error = -EINVAL;
+ goto out;
+ }
+ vcc->remote = *addr;
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
+ if (flags & O_NONBLOCK) {
+ finish_wait(sk->sk_sleep, &wait);
+ sock->state = SS_CONNECTING;
+ error = -EINPROGRESS;
+ goto out;
+ }
+ error = 0;
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ if (!signal_pending(current)) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ continue;
+ }
+ DPRINTK("*ABORT*\n");
+ /*
+ * This is tricky:
+ * Kernel ---close--> Demon
+ * Kernel <--close--- Demon
+ * or
+ * Kernel ---close--> Demon
+ * Kernel <--error--- Demon
+ * or
+ * Kernel ---close--> Demon
+ * Kernel <--okay---- Demon
+ * Kernel <--close--- Demon
+ */
+ sigd_enq(vcc,as_close,NULL,NULL,NULL);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ if (!sk->sk_err)
+ while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
+ && sigd) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ clear_bit(ATM_VF_REGIS,&vcc->flags);
+ clear_bit(ATM_VF_RELEASED,&vcc->flags);
+ clear_bit(ATM_VF_CLOSE,&vcc->flags);
+ /* we're gone now but may connect later */
+ error = -EINTR;
+ break;
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (error)
+ goto out;
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (sk->sk_err) {
+ error = -sk->sk_err;
+ goto out;
+ }
+ }
+/*
+ * Not supported yet
+ *
+ * #ifndef CONFIG_SINGLE_SIGITF
+ */
+ vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
+ vcc->qos.txtp.pcr = 0;
+ vcc->qos.txtp.min_pcr = 0;
+/*
+ * #endif
+ */
+ if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
+ sock->state = SS_CONNECTED;
+ else
+ (void) svc_disconnect(vcc);
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_listen(struct socket *sock,int backlog)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ DPRINTK("svc_listen %p\n",vcc);
+ lock_sock(sk);
+ /* let server handle listen on unbound sockets */
+ if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
+ error = -EINVAL;
+ goto out;
+ }
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ set_bit(ATM_VF_LISTEN,&vcc->flags);
+ sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
+ error = -sk->sk_err;
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_accept(struct socket *sock,struct socket *newsock,int flags)
+{
+ struct sock *sk = sock->sk;
+ struct sk_buff *skb;
+ struct atmsvc_msg *msg;
+ struct atm_vcc *old_vcc = ATM_SD(sock);
+ struct atm_vcc *new_vcc;
+ int error;
+
+ lock_sock(sk);
+
+ error = svc_create(newsock,0);
+ if (error)
+ goto out;
+
+ new_vcc = ATM_SD(newsock);
+
+ DPRINTK("svc_accept %p -> %p\n",old_vcc,new_vcc);
+ while (1) {
+ DEFINE_WAIT(wait);
+
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
+ sigd) {
+ if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break;
+ if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) {
+ error = -sk->sk_err;
+ break;
+ }
+ if (flags & O_NONBLOCK) {
+ error = -EAGAIN;
+ break;
+ }
+ release_sock(sk);
+ schedule();
+ lock_sock(sk);
+ if (signal_pending(current)) {
+ error = -ERESTARTSYS;
+ break;
+ }
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (error)
+ goto out;
+ if (!skb) {
+ error = -EUNATCH;
+ goto out;
+ }
+ msg = (struct atmsvc_msg *) skb->data;
+ new_vcc->qos = msg->qos;
+ set_bit(ATM_VF_HASQOS,&new_vcc->flags);
+ new_vcc->remote = msg->svc;
+ new_vcc->local = msg->local;
+ new_vcc->sap = msg->sap;
+ error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
+ msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci);
+ dev_kfree_skb(skb);
+ sk->sk_ack_backlog--;
+ if (error) {
+ sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
+ &old_vcc->qos,error);
+ error = error == -EAGAIN ? -EBUSY : error;
+ goto out;
+ }
+ /* wait should be short, so we ignore the non-blocking flag */
+ set_bit(ATM_VF_WAITING, &new_vcc->flags);
+ prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
+ while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
+ release_sock(sk);
+ schedule();
+ lock_sock(sk);
+ prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk_atm(new_vcc)->sk_sleep, &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (!sk_atm(new_vcc)->sk_err)
+ break;
+ if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
+ error = -sk_atm(new_vcc)->sk_err;
+ goto out;
+ }
+ }
+ newsock->state = SS_CONNECTED;
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_getname(struct socket *sock,struct sockaddr *sockaddr,
+ int *sockaddr_len,int peer)
+{
+ struct sockaddr_atmsvc *addr;
+
+ *sockaddr_len = sizeof(struct sockaddr_atmsvc);
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
+ sizeof(struct sockaddr_atmsvc));
+ return 0;
+}
+
+
+int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
+{
+ struct sock *sk = sk_atm(vcc);
+ DEFINE_WAIT(wait);
+
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
+ !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (!sigd) return -EUNATCH;
+ return -sk->sk_err;
+}
+
+
+static int svc_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int value, error = 0;
+
+ lock_sock(sk);
+ switch (optname) {
+ case SO_ATMSAP:
+ if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (copy_from_user(&vcc->sap, optval, optlen)) {
+ error = -EFAULT;
+ goto out;
+ }
+ set_bit(ATM_VF_HASSAP, &vcc->flags);
+ break;
+ case SO_MULTIPOINT:
+ if (level != SOL_ATM || optlen != sizeof(int)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (get_user(value, (int __user *) optval)) {
+ error = -EFAULT;
+ goto out;
+ }
+ if (value == 1) {
+ set_bit(ATM_VF_SESSION, &vcc->flags);
+ } else if (value == 0) {
+ clear_bit(ATM_VF_SESSION, &vcc->flags);
+ } else {
+ error = -EINVAL;
+ }
+ break;
+ default:
+ error = vcc_setsockopt(sock, level, optname,
+ optval, optlen);
+ }
+
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_getsockopt(struct socket *sock,int level,int optname,
+ char __user *optval,int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ int error = 0, len;
+
+ lock_sock(sk);
+ if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
+ error = vcc_getsockopt(sock, level, optname, optval, optlen);
+ goto out;
+ }
+ if (get_user(len, optlen)) {
+ error = -EFAULT;
+ goto out;
+ }
+ if (len != sizeof(struct atm_sap)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
+ error = -EFAULT;
+ goto out;
+ }
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
+ int sockaddr_len, int flags)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ lock_sock(sk);
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sigd_enq(vcc, as_addparty, NULL, NULL,
+ (struct sockaddr_atmsvc *) sockaddr);
+ if (flags & O_NONBLOCK) {
+ finish_wait(sk->sk_sleep, &wait);
+ error = -EINPROGRESS;
+ goto out;
+ }
+ DPRINTK("svc_addparty added wait queue\n");
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ error = xchg(&sk->sk_err_soft, 0);
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_dropparty(struct socket *sock, int ep_ref)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ lock_sock(sk);
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ error = xchg(&sk->sk_err_soft, 0);
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ int error, ep_ref;
+ struct sockaddr_atmsvc sa;
+ struct atm_vcc *vcc = ATM_SD(sock);
+
+ switch (cmd) {
+ case ATM_ADDPARTY:
+ if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ return -EINVAL;
+ if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
+ return -EFAULT;
+ error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0);
+ break;
+ case ATM_DROPPARTY:
+ if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ return -EINVAL;
+ if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
+ return -EFAULT;
+ error = svc_dropparty(sock, ep_ref);
+ break;
+ default:
+ error = vcc_ioctl(sock, cmd, arg);
+ }
+
+ return error;
+}
+
+static struct proto_ops svc_proto_ops = {
+ .family = PF_ATMSVC,
+ .owner = THIS_MODULE,
+
+ .release = svc_release,
+ .bind = svc_bind,
+ .connect = svc_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = svc_accept,
+ .getname = svc_getname,
+ .poll = vcc_poll,
+ .ioctl = svc_ioctl,
+ .listen = svc_listen,
+ .shutdown = svc_shutdown,
+ .setsockopt = svc_setsockopt,
+ .getsockopt = svc_getsockopt,
+ .sendmsg = vcc_sendmsg,
+ .recvmsg = vcc_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
+
+static int svc_create(struct socket *sock,int protocol)
+{
+ int error;
+
+ sock->ops = &svc_proto_ops;
+ error = vcc_create(sock, protocol, AF_ATMSVC);
+ if (error) return error;
+ ATM_SD(sock)->local.sas_family = AF_ATMSVC;
+ ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
+ return 0;
+}
+
+
+static struct net_proto_family svc_family_ops = {
+ .family = PF_ATMSVC,
+ .create = svc_create,
+ .owner = THIS_MODULE,
+};
+
+
+/*
+ * Initialize the ATM SVC protocol family
+ */
+
+int __init atmsvc_init(void)
+{
+ return sock_register(&svc_family_ops);
+}
+
+void atmsvc_exit(void)
+{
+ sock_unregister(PF_ATMSVC);
+}