Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NET An implementation of the SOCKET network access protocol. |
| 3 | * |
| 4 | * Version: @(#)socket.c 1.1.93 18/02/95 |
| 5 | * |
| 6 | * Authors: Orest Zborowski, <obz@Kodak.COM> |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 7 | * Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 9 | * |
| 10 | * Fixes: |
| 11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in |
| 12 | * shutdown() |
| 13 | * Alan Cox : verify_area() fixes |
| 14 | * Alan Cox : Removed DDI |
| 15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug |
| 16 | * Alan Cox : Moved a load of checks to the very |
| 17 | * top level. |
| 18 | * Alan Cox : Move address structures to/from user |
| 19 | * mode above the protocol layers. |
| 20 | * Rob Janssen : Allow 0 length sends. |
| 21 | * Alan Cox : Asynchronous I/O support (cribbed from the |
| 22 | * tty drivers). |
| 23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) |
| 24 | * Jeff Uphoff : Made max number of sockets command-line |
| 25 | * configurable. |
| 26 | * Matti Aarnio : Made the number of sockets dynamic, |
| 27 | * to be allocated when needed, and mr. |
| 28 | * Uphoff's max is used as max to be |
| 29 | * allowed to allocate. |
| 30 | * Linus : Argh. removed all the socket allocation |
| 31 | * altogether: it's in the inode now. |
| 32 | * Alan Cox : Made sock_alloc()/sock_release() public |
| 33 | * for NetROM and future kernel nfsd type |
| 34 | * stuff. |
| 35 | * Alan Cox : sendmsg/recvmsg basics. |
| 36 | * Tom Dyas : Export net symbols. |
| 37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". |
| 38 | * Alan Cox : Added thread locking to sys_* calls |
| 39 | * for sockets. May have errors at the |
| 40 | * moment. |
| 41 | * Kevin Buhr : Fixed the dumb errors in the above. |
| 42 | * Andi Kleen : Some small cleanups, optimizations, |
| 43 | * and fixed a copy_from_user() bug. |
| 44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | * protocol-independent |
| 47 | * |
| 48 | * |
| 49 | * This program is free software; you can redistribute it and/or |
| 50 | * modify it under the terms of the GNU General Public License |
| 51 | * as published by the Free Software Foundation; either version |
| 52 | * 2 of the License, or (at your option) any later version. |
| 53 | * |
| 54 | * |
| 55 | * This module is effectively the top level interface to the BSD socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 56 | * paradigm. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | * |
| 58 | * Based upon Swansea University Computer Society NET3.039 |
| 59 | */ |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include <linux/socket.h> |
| 63 | #include <linux/file.h> |
| 64 | #include <linux/net.h> |
| 65 | #include <linux/interrupt.h> |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 66 | #include <linux/thread_info.h> |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 67 | #include <linux/rcupdate.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #include <linux/netdevice.h> |
| 69 | #include <linux/proc_fs.h> |
| 70 | #include <linux/seq_file.h> |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 71 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #include <linux/if_bridge.h> |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 73 | #include <linux/if_frad.h> |
| 74 | #include <linux/if_vlan.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #include <linux/init.h> |
| 76 | #include <linux/poll.h> |
| 77 | #include <linux/cache.h> |
| 78 | #include <linux/module.h> |
| 79 | #include <linux/highmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #include <linux/mount.h> |
| 81 | #include <linux/security.h> |
| 82 | #include <linux/syscalls.h> |
| 83 | #include <linux/compat.h> |
| 84 | #include <linux/kmod.h> |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 85 | #include <linux/audit.h> |
Adrian Bunk | d86b5e0 | 2006-01-21 00:46:55 +0100 | [diff] [blame] | 86 | #include <linux/wireless.h> |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 87 | #include <linux/nsproxy.h> |
Nick Black | 1fd7317d | 2009-09-22 16:43:33 -0700 | [diff] [blame] | 88 | #include <linux/magic.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 89 | #include <linux/slab.h> |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 90 | #include <linux/xattr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | #include <asm/uaccess.h> |
| 93 | #include <asm/unistd.h> |
| 94 | |
| 95 | #include <net/compat.h> |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 96 | #include <net/wext.h> |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 97 | #include <net/cls_cgroup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | #include <net/sock.h> |
| 100 | #include <linux/netfilter.h> |
| 101 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 102 | #include <linux/if_tun.h> |
| 103 | #include <linux/ipv6_route.h> |
| 104 | #include <linux/route.h> |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 105 | #include <linux/sockios.h> |
| 106 | #include <linux/atalk.h> |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 107 | #include <net/ll_poll.h> |
| 108 | |
| 109 | #ifdef CONFIG_NET_LL_RX_POLL |
Eliezer Tamir | eb6db62 | 2013-06-14 16:33:25 +0300 | [diff] [blame] | 110 | unsigned int sysctl_net_ll_poll __read_mostly; |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 111 | #endif |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 114 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 115 | unsigned long nr_segs, loff_t pos); |
| 116 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 117 | unsigned long nr_segs, loff_t pos); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 118 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | |
| 120 | static int sock_close(struct inode *inode, struct file *file); |
| 121 | static unsigned int sock_poll(struct file *file, |
| 122 | struct poll_table_struct *wait); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 123 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 124 | #ifdef CONFIG_COMPAT |
| 125 | static long compat_sock_ioctl(struct file *file, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 126 | unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 127 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | static int sock_fasync(int fd, struct file *filp, int on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 130 | int offset, size_t size, loff_t *ppos, int more); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 131 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 132 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 133 | unsigned int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | /* |
| 136 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear |
| 137 | * in the operation structures but are done directly via the socketcall() multiplexor. |
| 138 | */ |
| 139 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 140 | static const struct file_operations socket_file_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | .owner = THIS_MODULE, |
| 142 | .llseek = no_llseek, |
| 143 | .aio_read = sock_aio_read, |
| 144 | .aio_write = sock_aio_write, |
| 145 | .poll = sock_poll, |
| 146 | .unlocked_ioctl = sock_ioctl, |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 147 | #ifdef CONFIG_COMPAT |
| 148 | .compat_ioctl = compat_sock_ioctl, |
| 149 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | .mmap = sock_mmap, |
| 151 | .open = sock_no_open, /* special open code to disallow open via /proc */ |
| 152 | .release = sock_close, |
| 153 | .fasync = sock_fasync, |
Jens Axboe | 5274f05 | 2006-03-30 15:15:30 +0200 | [diff] [blame] | 154 | .sendpage = sock_sendpage, |
| 155 | .splice_write = generic_splice_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 156 | .splice_read = sock_splice_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | }; |
| 158 | |
| 159 | /* |
| 160 | * The protocol list. Each protocol is registered in here. |
| 161 | */ |
| 162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | static DEFINE_SPINLOCK(net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 164 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | /* |
| 167 | * Statistics counters of the socket lists |
| 168 | */ |
| 169 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 170 | static DEFINE_PER_CPU(int, sockets_in_use); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 173 | * Support routines. |
| 174 | * Move socket addresses back and forth across the kernel/user |
| 175 | * divide and look after the messy bits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | */ |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | /** |
| 179 | * move_addr_to_kernel - copy a socket address into kernel space |
| 180 | * @uaddr: Address in user space |
| 181 | * @kaddr: Address in kernel space |
| 182 | * @ulen: Length in user space |
| 183 | * |
| 184 | * The address is copied into kernel space. If the provided address is |
| 185 | * too long an error code of -EINVAL is returned. If the copy gives |
| 186 | * invalid addresses -EFAULT is returned. On a success 0 is returned. |
| 187 | */ |
| 188 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 189 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 191 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 193 | if (ulen == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | return 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 195 | if (copy_from_user(kaddr, uaddr, ulen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 197 | return audit_sockaddr(ulen, kaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | /** |
| 201 | * move_addr_to_user - copy an address to user space |
| 202 | * @kaddr: kernel space address |
| 203 | * @klen: length of address in kernel |
| 204 | * @uaddr: user space address |
| 205 | * @ulen: pointer to user length field |
| 206 | * |
| 207 | * The value pointed to by ulen on entry is the buffer length available. |
| 208 | * This is overwritten with the buffer space used. -EINVAL is returned |
| 209 | * if an overlong buffer is specified or a negative buffer size. -EFAULT |
| 210 | * is returned if either the buffer or the length field are not |
| 211 | * accessible. |
| 212 | * After copying the data up to the limit the user specifies, the true |
| 213 | * length of the data is written over the length limit the user |
| 214 | * specified. Zero is returned for a success. |
| 215 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 216 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 217 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 218 | void __user *uaddr, int __user *ulen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | { |
| 220 | int err; |
| 221 | int len; |
| 222 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 223 | err = get_user(len, ulen); |
| 224 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 226 | if (len > klen) |
| 227 | len = klen; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 228 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 230 | if (len) { |
Steve Grubb | d6fe394 | 2006-03-30 12:20:22 -0500 | [diff] [blame] | 231 | if (audit_sockaddr(klen, kaddr)) |
| 232 | return -ENOMEM; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 233 | if (copy_to_user(uaddr, kaddr, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | return -EFAULT; |
| 235 | } |
| 236 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 237 | * "fromlen shall refer to the value before truncation.." |
| 238 | * 1003.1g |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | */ |
| 240 | return __put_user(klen, ulen); |
| 241 | } |
| 242 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 243 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | |
| 245 | static struct inode *sock_alloc_inode(struct super_block *sb) |
| 246 | { |
| 247 | struct socket_alloc *ei; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 248 | struct socket_wq *wq; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 249 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 250 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | if (!ei) |
| 252 | return NULL; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 253 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
| 254 | if (!wq) { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 255 | kmem_cache_free(sock_inode_cachep, ei); |
| 256 | return NULL; |
| 257 | } |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 258 | init_waitqueue_head(&wq->wait); |
| 259 | wq->fasync_list = NULL; |
| 260 | RCU_INIT_POINTER(ei->socket.wq, wq); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | ei->socket.state = SS_UNCONNECTED; |
| 263 | ei->socket.flags = 0; |
| 264 | ei->socket.ops = NULL; |
| 265 | ei->socket.sk = NULL; |
| 266 | ei->socket.file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
| 268 | return &ei->vfs_inode; |
| 269 | } |
| 270 | |
| 271 | static void sock_destroy_inode(struct inode *inode) |
| 272 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 273 | struct socket_alloc *ei; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 274 | struct socket_wq *wq; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 275 | |
| 276 | ei = container_of(inode, struct socket_alloc, vfs_inode); |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 277 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
Lai Jiangshan | 6184522 | 2011-03-18 12:10:25 +0800 | [diff] [blame] | 278 | kfree_rcu(wq, rcu); |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 279 | kmem_cache_free(sock_inode_cachep, ei); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | } |
| 281 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 282 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 284 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 286 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | static int init_inodecache(void) |
| 290 | { |
| 291 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 292 | sizeof(struct socket_alloc), |
| 293 | 0, |
| 294 | (SLAB_HWCACHE_ALIGN | |
| 295 | SLAB_RECLAIM_ACCOUNT | |
| 296 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 297 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | if (sock_inode_cachep == NULL) |
| 299 | return -ENOMEM; |
| 300 | return 0; |
| 301 | } |
| 302 | |
Alexey Dobriyan | b87221d | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 303 | static const struct super_operations sockfs_ops = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 304 | .alloc_inode = sock_alloc_inode, |
| 305 | .destroy_inode = sock_destroy_inode, |
| 306 | .statfs = simple_statfs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | }; |
| 308 | |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 309 | /* |
| 310 | * sockfs_dname() is called from d_path(). |
| 311 | */ |
| 312 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) |
| 313 | { |
| 314 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", |
| 315 | dentry->d_inode->i_ino); |
| 316 | } |
| 317 | |
Al Viro | 3ba13d1 | 2009-02-20 06:02:22 +0000 | [diff] [blame] | 318 | static const struct dentry_operations sockfs_dentry_operations = { |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 319 | .d_dname = sockfs_dname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | }; |
| 321 | |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 322 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
| 323 | int flags, const char *dev_name, void *data) |
| 324 | { |
| 325 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, |
| 326 | &sockfs_dentry_operations, SOCKFS_MAGIC); |
| 327 | } |
| 328 | |
| 329 | static struct vfsmount *sock_mnt __read_mostly; |
| 330 | |
| 331 | static struct file_system_type sock_fs_type = { |
| 332 | .name = "sockfs", |
| 333 | .mount = sockfs_mount, |
| 334 | .kill_sb = kill_anon_super, |
| 335 | }; |
| 336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | /* |
| 338 | * Obtains the first available file descriptor and sets it up for use. |
| 339 | * |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 340 | * These functions create file structures and maps them to fd space |
| 341 | * of the current process. On success it returns file descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | * and file struct implicitly stored in sock->file. |
| 343 | * Note that another thread may close file descriptor before we return |
| 344 | * from this function. We use the fact that now we do not refer |
| 345 | * to socket after mapping. If one day we will need it, this |
| 346 | * function will increment ref. count on file by 1. |
| 347 | * |
| 348 | * In any case returned fd MAY BE not valid! |
| 349 | * This race condition is unavoidable |
| 350 | * with shared fd spaces, we cannot solve it inside kernel, |
| 351 | * but we take care of internal coherence yet. |
| 352 | */ |
| 353 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 354 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | { |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 356 | struct qstr name = { .name = "" }; |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 357 | struct path path; |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 358 | struct file *file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 359 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 360 | if (dname) { |
| 361 | name.name = dname; |
| 362 | name.len = strlen(name.name); |
| 363 | } else if (sock->sk) { |
| 364 | name.name = sock->sk->sk_prot_creator->name; |
| 365 | name.len = strlen(name.name); |
| 366 | } |
Nick Piggin | 4b93688 | 2011-01-07 17:50:07 +1100 | [diff] [blame] | 367 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 368 | if (unlikely(!path.dentry)) |
| 369 | return ERR_PTR(-ENOMEM); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 370 | path.mnt = mntget(sock_mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 372 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 373 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
| 374 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 375 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 376 | &socket_file_ops); |
Anatol Pomozov | 39b6525 | 2012-09-12 20:11:55 -0700 | [diff] [blame] | 377 | if (unlikely(IS_ERR(file))) { |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 378 | /* drop dentry, keep inode */ |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 379 | ihold(path.dentry->d_inode); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 380 | path_put(&path); |
Anatol Pomozov | 39b6525 | 2012-09-12 20:11:55 -0700 | [diff] [blame] | 381 | return file; |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 382 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 383 | |
| 384 | sock->file = file; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 385 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 386 | file->private_data = sock; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 387 | return file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 388 | } |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 389 | EXPORT_SYMBOL(sock_alloc_file); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 390 | |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 391 | static int sock_map_fd(struct socket *sock, int flags) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 392 | { |
| 393 | struct file *newfile; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 394 | int fd = get_unused_fd_flags(flags); |
| 395 | if (unlikely(fd < 0)) |
| 396 | return fd; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 397 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 398 | newfile = sock_alloc_file(sock, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 399 | if (likely(!IS_ERR(newfile))) { |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 400 | fd_install(fd, newfile); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 401 | return fd; |
| 402 | } |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 403 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 404 | put_unused_fd(fd); |
| 405 | return PTR_ERR(newfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | } |
| 407 | |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 408 | struct socket *sock_from_file(struct file *file, int *err) |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 409 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 410 | if (file->f_op == &socket_file_ops) |
| 411 | return file->private_data; /* set in sock_map_fd */ |
| 412 | |
Eric Dumazet | 23bb80d | 2007-02-08 14:59:57 -0800 | [diff] [blame] | 413 | *err = -ENOTSOCK; |
| 414 | return NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 415 | } |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 416 | EXPORT_SYMBOL(sock_from_file); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | /** |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 419 | * sockfd_lookup - Go from a file number to its socket slot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | * @fd: file handle |
| 421 | * @err: pointer to an error code return |
| 422 | * |
| 423 | * The file handle passed in is locked and the socket it is bound |
| 424 | * too is returned. If an error occurs the err pointer is overwritten |
| 425 | * with a negative errno code and NULL is returned. The function checks |
| 426 | * for both invalid handles and passing a handle which is not a socket. |
| 427 | * |
| 428 | * On a success the socket object pointer is returned. |
| 429 | */ |
| 430 | |
| 431 | struct socket *sockfd_lookup(int fd, int *err) |
| 432 | { |
| 433 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | struct socket *sock; |
| 435 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 436 | file = fget(fd); |
| 437 | if (!file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | *err = -EBADF; |
| 439 | return NULL; |
| 440 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 441 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 442 | sock = sock_from_file(file, err); |
| 443 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | fput(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | return sock; |
| 446 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 447 | EXPORT_SYMBOL(sockfd_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 449 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
| 450 | { |
| 451 | struct file *file; |
| 452 | struct socket *sock; |
| 453 | |
Hua Zhong | 3672558 | 2006-04-19 15:25:02 -0700 | [diff] [blame] | 454 | *err = -EBADF; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 455 | file = fget_light(fd, fput_needed); |
| 456 | if (file) { |
| 457 | sock = sock_from_file(file, err); |
| 458 | if (sock) |
| 459 | return sock; |
| 460 | fput_light(file, *fput_needed); |
| 461 | } |
| 462 | return NULL; |
| 463 | } |
| 464 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 465 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
| 466 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) |
| 467 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) |
| 468 | static ssize_t sockfs_getxattr(struct dentry *dentry, |
| 469 | const char *name, void *value, size_t size) |
| 470 | { |
| 471 | const char *proto_name; |
| 472 | size_t proto_size; |
| 473 | int error; |
| 474 | |
| 475 | error = -ENODATA; |
| 476 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { |
| 477 | proto_name = dentry->d_name.name; |
| 478 | proto_size = strlen(proto_name); |
| 479 | |
| 480 | if (value) { |
| 481 | error = -ERANGE; |
| 482 | if (proto_size + 1 > size) |
| 483 | goto out; |
| 484 | |
| 485 | strncpy(value, proto_name, proto_size + 1); |
| 486 | } |
| 487 | error = proto_size + 1; |
| 488 | } |
| 489 | |
| 490 | out: |
| 491 | return error; |
| 492 | } |
| 493 | |
| 494 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, |
| 495 | size_t size) |
| 496 | { |
| 497 | ssize_t len; |
| 498 | ssize_t used = 0; |
| 499 | |
| 500 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); |
| 501 | if (len < 0) |
| 502 | return len; |
| 503 | used += len; |
| 504 | if (buffer) { |
| 505 | if (size < used) |
| 506 | return -ERANGE; |
| 507 | buffer += len; |
| 508 | } |
| 509 | |
| 510 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); |
| 511 | used += len; |
| 512 | if (buffer) { |
| 513 | if (size < used) |
| 514 | return -ERANGE; |
| 515 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); |
| 516 | buffer += len; |
| 517 | } |
| 518 | |
| 519 | return used; |
| 520 | } |
| 521 | |
| 522 | static const struct inode_operations sockfs_inode_ops = { |
| 523 | .getxattr = sockfs_getxattr, |
| 524 | .listxattr = sockfs_listxattr, |
| 525 | }; |
| 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | /** |
| 528 | * sock_alloc - allocate a socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 529 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | * Allocate a new inode and socket object. The two are bound together |
| 531 | * and initialised. The socket is then returned. If we are out of inodes |
| 532 | * NULL is returned. |
| 533 | */ |
| 534 | |
| 535 | static struct socket *sock_alloc(void) |
| 536 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 537 | struct inode *inode; |
| 538 | struct socket *sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
Eric Dumazet | a209dfc | 2011-07-26 11:36:34 +0200 | [diff] [blame] | 540 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | if (!inode) |
| 542 | return NULL; |
| 543 | |
| 544 | sock = SOCKET_I(inode); |
| 545 | |
Eric Dumazet | 29a020d | 2009-09-15 02:39:20 -0700 | [diff] [blame] | 546 | kmemcheck_annotate_bitfield(sock, type); |
Christoph Hellwig | 85fe402 | 2010-10-23 11:19:54 -0400 | [diff] [blame] | 547 | inode->i_ino = get_next_ino(); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 548 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
David Howells | 8192b0c | 2008-11-14 10:39:10 +1100 | [diff] [blame] | 549 | inode->i_uid = current_fsuid(); |
| 550 | inode->i_gid = current_fsgid(); |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 551 | inode->i_op = &sockfs_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | |
Alex Shi | 19e8d69 | 2012-05-14 14:15:31 -0700 | [diff] [blame] | 553 | this_cpu_add(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | return sock; |
| 555 | } |
| 556 | |
| 557 | /* |
| 558 | * In theory you can't get an open on this inode, but /proc provides |
| 559 | * a back door. Remember to keep it shut otherwise you'll let the |
| 560 | * creepy crawlies in. |
| 561 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
| 564 | { |
| 565 | return -ENXIO; |
| 566 | } |
| 567 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 568 | const struct file_operations bad_sock_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | .owner = THIS_MODULE, |
| 570 | .open = sock_no_open, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 571 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | }; |
| 573 | |
| 574 | /** |
| 575 | * sock_release - close a socket |
| 576 | * @sock: socket to close |
| 577 | * |
| 578 | * The socket is released from the protocol stack if it has a release |
| 579 | * callback, and the inode is then released if the socket is bound to |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 580 | * an inode not a file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 582 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | void sock_release(struct socket *sock) |
| 584 | { |
| 585 | if (sock->ops) { |
| 586 | struct module *owner = sock->ops->owner; |
| 587 | |
| 588 | sock->ops->release(sock); |
| 589 | sock->ops = NULL; |
| 590 | module_put(owner); |
| 591 | } |
| 592 | |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 593 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
| 595 | |
Mikulas Patocka | b09e786 | 2012-07-19 06:13:36 +0000 | [diff] [blame] | 596 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
| 597 | return; |
| 598 | |
Alex Shi | 19e8d69 | 2012-05-14 14:15:31 -0700 | [diff] [blame] | 599 | this_cpu_sub(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | if (!sock->file) { |
| 601 | iput(SOCK_INODE(sock)); |
| 602 | return; |
| 603 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 604 | sock->file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 606 | EXPORT_SYMBOL(sock_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
Daniel Borkmann | bf84a01 | 2013-04-14 08:08:13 +0000 | [diff] [blame] | 608 | void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 609 | { |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 610 | *tx_flags = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 611 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 612 | *tx_flags |= SKBTX_HW_TSTAMP; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 613 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 614 | *tx_flags |= SKBTX_SW_TSTAMP; |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 615 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
| 616 | *tx_flags |= SKBTX_WIFI_STATUS; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 617 | } |
| 618 | EXPORT_SYMBOL(sock_tx_timestamp); |
| 619 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 620 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 621 | struct msghdr *msg, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | { |
| 623 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | |
| 625 | si->sock = sock; |
| 626 | si->scm = NULL; |
| 627 | si->msg = msg; |
| 628 | si->size = size; |
| 629 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | return sock->ops->sendmsg(iocb, sock, msg, size); |
| 631 | } |
| 632 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 633 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 634 | struct msghdr *msg, size_t size) |
| 635 | { |
| 636 | int err = security_socket_sendmsg(sock, msg, size); |
| 637 | |
| 638 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); |
| 639 | } |
| 640 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
| 642 | { |
| 643 | struct kiocb iocb; |
| 644 | struct sock_iocb siocb; |
| 645 | int ret; |
| 646 | |
| 647 | init_sync_kiocb(&iocb, NULL); |
| 648 | iocb.private = &siocb; |
| 649 | ret = __sock_sendmsg(&iocb, sock, msg, size); |
| 650 | if (-EIOCBQUEUED == ret) |
| 651 | ret = wait_on_sync_kiocb(&iocb); |
| 652 | return ret; |
| 653 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 654 | EXPORT_SYMBOL(sock_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
Eric Dumazet | 894dc24 | 2011-07-26 02:39:41 +0000 | [diff] [blame] | 656 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 657 | { |
| 658 | struct kiocb iocb; |
| 659 | struct sock_iocb siocb; |
| 660 | int ret; |
| 661 | |
| 662 | init_sync_kiocb(&iocb, NULL); |
| 663 | iocb.private = &siocb; |
| 664 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); |
| 665 | if (-EIOCBQUEUED == ret) |
| 666 | ret = wait_on_sync_kiocb(&iocb); |
| 667 | return ret; |
| 668 | } |
| 669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 671 | struct kvec *vec, size_t num, size_t size) |
| 672 | { |
| 673 | mm_segment_t oldfs = get_fs(); |
| 674 | int result; |
| 675 | |
| 676 | set_fs(KERNEL_DS); |
| 677 | /* |
| 678 | * the following is safe, since for compiler definitions of kvec and |
| 679 | * iovec are identical, yielding the same in-core layout and alignment |
| 680 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 681 | msg->msg_iov = (struct iovec *)vec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | msg->msg_iovlen = num; |
| 683 | result = sock_sendmsg(sock, msg, size); |
| 684 | set_fs(oldfs); |
| 685 | return result; |
| 686 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 687 | EXPORT_SYMBOL(kernel_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 689 | /* |
| 690 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 691 | */ |
| 692 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 693 | struct sk_buff *skb) |
| 694 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 695 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
| 696 | struct timespec ts[3]; |
| 697 | int empty = 1; |
| 698 | struct skb_shared_hwtstamps *shhwtstamps = |
| 699 | skb_hwtstamps(skb); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 700 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 701 | /* Race occurred between timestamp enabling and packet |
| 702 | receiving. Fill in the current time for now. */ |
| 703 | if (need_software_tstamp && skb->tstamp.tv64 == 0) |
| 704 | __net_timestamp(skb); |
| 705 | |
| 706 | if (need_software_tstamp) { |
| 707 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
| 708 | struct timeval tv; |
| 709 | skb_get_timestamp(skb, &tv); |
| 710 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, |
| 711 | sizeof(tv), &tv); |
| 712 | } else { |
Hagen Paul Pfeifer | 842509b | 2010-04-06 05:39:52 +0000 | [diff] [blame] | 713 | skb_get_timestampns(skb, &ts[0]); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 714 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
Hagen Paul Pfeifer | 842509b | 2010-04-06 05:39:52 +0000 | [diff] [blame] | 715 | sizeof(ts[0]), &ts[0]); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 716 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 717 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 718 | |
| 719 | |
| 720 | memset(ts, 0, sizeof(ts)); |
Daniel Borkmann | 6e94d1e | 2013-04-16 01:29:10 +0000 | [diff] [blame] | 721 | if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) && |
| 722 | ktime_to_timespec_cond(skb->tstamp, ts + 0)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 723 | empty = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 724 | if (shhwtstamps) { |
| 725 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && |
Daniel Borkmann | 6e94d1e | 2013-04-16 01:29:10 +0000 | [diff] [blame] | 726 | ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 727 | empty = 0; |
| 728 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && |
Daniel Borkmann | 6e94d1e | 2013-04-16 01:29:10 +0000 | [diff] [blame] | 729 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 730 | empty = 0; |
| 731 | } |
| 732 | if (!empty) |
| 733 | put_cmsg(msg, SOL_SOCKET, |
| 734 | SCM_TIMESTAMPING, sizeof(ts), &ts); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 735 | } |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 736 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 737 | |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 738 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
| 739 | struct sk_buff *skb) |
| 740 | { |
| 741 | int ack; |
| 742 | |
| 743 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) |
| 744 | return; |
| 745 | if (!skb->wifi_acked_valid) |
| 746 | return; |
| 747 | |
| 748 | ack = skb->wifi_acked; |
| 749 | |
| 750 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); |
| 751 | } |
| 752 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); |
| 753 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 754 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
| 755 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 756 | { |
| 757 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) |
| 758 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
| 759 | sizeof(__u32), &skb->dropcount); |
| 760 | } |
| 761 | |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 762 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 763 | struct sk_buff *skb) |
| 764 | { |
| 765 | sock_recv_timestamp(msg, sk, skb); |
| 766 | sock_recv_drops(msg, sk, skb); |
| 767 | } |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 768 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 769 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 770 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 771 | struct msghdr *msg, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 773 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
| 774 | |
| 775 | si->sock = sock; |
| 776 | si->scm = NULL; |
| 777 | si->msg = msg; |
| 778 | si->size = size; |
| 779 | si->flags = flags; |
| 780 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
| 782 | } |
| 783 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 784 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 785 | struct msghdr *msg, size_t size, int flags) |
| 786 | { |
| 787 | int err = security_socket_recvmsg(sock, msg, size, flags); |
| 788 | |
| 789 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); |
| 790 | } |
| 791 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 792 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | size_t size, int flags) |
| 794 | { |
| 795 | struct kiocb iocb; |
| 796 | struct sock_iocb siocb; |
| 797 | int ret; |
| 798 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 799 | init_sync_kiocb(&iocb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 800 | iocb.private = &siocb; |
| 801 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); |
| 802 | if (-EIOCBQUEUED == ret) |
| 803 | ret = wait_on_sync_kiocb(&iocb); |
| 804 | return ret; |
| 805 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 806 | EXPORT_SYMBOL(sock_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 808 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
| 809 | size_t size, int flags) |
| 810 | { |
| 811 | struct kiocb iocb; |
| 812 | struct sock_iocb siocb; |
| 813 | int ret; |
| 814 | |
| 815 | init_sync_kiocb(&iocb, NULL); |
| 816 | iocb.private = &siocb; |
| 817 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); |
| 818 | if (-EIOCBQUEUED == ret) |
| 819 | ret = wait_on_sync_kiocb(&iocb); |
| 820 | return ret; |
| 821 | } |
| 822 | |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 823 | /** |
| 824 | * kernel_recvmsg - Receive a message from a socket (kernel space) |
| 825 | * @sock: The socket to receive the message from |
| 826 | * @msg: Received message |
| 827 | * @vec: Input s/g array for message data |
| 828 | * @num: Size of input s/g array |
| 829 | * @size: Number of bytes to read |
| 830 | * @flags: Message flags (MSG_DONTWAIT, etc...) |
| 831 | * |
| 832 | * On return the msg structure contains the scatter/gather array passed in the |
| 833 | * vec argument. The array is modified so that it consists of the unfilled |
| 834 | * portion of the original array. |
| 835 | * |
| 836 | * The returned value is the total number of bytes received, or an error. |
| 837 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 838 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 839 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | { |
| 841 | mm_segment_t oldfs = get_fs(); |
| 842 | int result; |
| 843 | |
| 844 | set_fs(KERNEL_DS); |
| 845 | /* |
| 846 | * the following is safe, since for compiler definitions of kvec and |
| 847 | * iovec are identical, yielding the same in-core layout and alignment |
| 848 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 849 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 850 | result = sock_recvmsg(sock, msg, size, flags); |
| 851 | set_fs(oldfs); |
| 852 | return result; |
| 853 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 854 | EXPORT_SYMBOL(kernel_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | |
| 856 | static void sock_aio_dtor(struct kiocb *iocb) |
| 857 | { |
| 858 | kfree(iocb->private); |
| 859 | } |
| 860 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 861 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 862 | int offset, size_t size, loff_t *ppos, int more) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | { |
| 864 | struct socket *sock; |
| 865 | int flags; |
| 866 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 867 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | |
Eric Dumazet | 35f9c09 | 2012-04-05 03:05:35 +0000 | [diff] [blame] | 869 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 870 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ |
| 871 | flags |= more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
Linus Torvalds | e694958 | 2009-08-13 08:28:36 -0700 | [diff] [blame] | 873 | return kernel_sendpage(sock, page, offset, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | } |
| 875 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 876 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 877 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 878 | unsigned int flags) |
| 879 | { |
| 880 | struct socket *sock = file->private_data; |
| 881 | |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 882 | if (unlikely(!sock->ops->splice_read)) |
| 883 | return -EINVAL; |
| 884 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 885 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
| 886 | } |
| 887 | |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 888 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 889 | struct sock_iocb *siocb) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 890 | { |
| 891 | if (!is_sync_kiocb(iocb)) { |
| 892 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); |
| 893 | if (!siocb) |
| 894 | return NULL; |
| 895 | iocb->ki_dtor = sock_aio_dtor; |
| 896 | } |
| 897 | |
| 898 | siocb->kiocb = iocb; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 899 | iocb->private = siocb; |
| 900 | return siocb; |
| 901 | } |
| 902 | |
| 903 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 904 | struct file *file, const struct iovec *iov, |
| 905 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 906 | { |
| 907 | struct socket *sock = file->private_data; |
| 908 | size_t size = 0; |
| 909 | int i; |
| 910 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 911 | for (i = 0; i < nr_segs; i++) |
| 912 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 913 | |
| 914 | msg->msg_name = NULL; |
| 915 | msg->msg_namelen = 0; |
| 916 | msg->msg_control = NULL; |
| 917 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 918 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 919 | msg->msg_iovlen = nr_segs; |
| 920 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 921 | |
| 922 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); |
| 923 | } |
| 924 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 925 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 926 | unsigned long nr_segs, loff_t pos) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 927 | { |
| 928 | struct sock_iocb siocb, *x; |
| 929 | |
| 930 | if (pos != 0) |
| 931 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 932 | |
| 933 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 934 | return 0; |
| 935 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 936 | |
| 937 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 938 | if (!x) |
| 939 | return -ENOMEM; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 940 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 941 | } |
| 942 | |
| 943 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 944 | struct file *file, const struct iovec *iov, |
| 945 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 946 | { |
| 947 | struct socket *sock = file->private_data; |
| 948 | size_t size = 0; |
| 949 | int i; |
| 950 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 951 | for (i = 0; i < nr_segs; i++) |
| 952 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 953 | |
| 954 | msg->msg_name = NULL; |
| 955 | msg->msg_namelen = 0; |
| 956 | msg->msg_control = NULL; |
| 957 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 958 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 959 | msg->msg_iovlen = nr_segs; |
| 960 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 961 | if (sock->type == SOCK_SEQPACKET) |
| 962 | msg->msg_flags |= MSG_EOR; |
| 963 | |
| 964 | return __sock_sendmsg(iocb, sock, msg, size); |
| 965 | } |
| 966 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 967 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 968 | unsigned long nr_segs, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | { |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 970 | struct sock_iocb siocb, *x; |
| 971 | |
| 972 | if (pos != 0) |
| 973 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 974 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 975 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 976 | if (!x) |
| 977 | return -ENOMEM; |
| 978 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 979 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | /* |
| 983 | * Atomic setting of ioctl hooks to avoid race |
| 984 | * with module unload. |
| 985 | */ |
| 986 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 987 | static DEFINE_MUTEX(br_ioctl_mutex); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 988 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 990 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 992 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 994 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | } |
| 996 | EXPORT_SYMBOL(brioctl_set); |
| 997 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 998 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 999 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1001 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1003 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1005 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | } |
| 1007 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 1008 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1009 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1010 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1012 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1014 | mutex_lock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | dlci_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1016 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | } |
| 1018 | EXPORT_SYMBOL(dlci_ioctl_set); |
| 1019 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1020 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
| 1021 | unsigned int cmd, unsigned long arg) |
| 1022 | { |
| 1023 | int err; |
| 1024 | void __user *argp = (void __user *)arg; |
| 1025 | |
| 1026 | err = sock->ops->ioctl(sock, cmd, arg); |
| 1027 | |
| 1028 | /* |
| 1029 | * If this ioctl is unknown try to hand it down |
| 1030 | * to the NIC driver. |
| 1031 | */ |
| 1032 | if (err == -ENOIOCTLCMD) |
| 1033 | err = dev_ioctl(net, cmd, argp); |
| 1034 | |
| 1035 | return err; |
| 1036 | } |
| 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | /* |
| 1039 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 1040 | * what to do with it - that's up to the protocol still. |
| 1041 | */ |
| 1042 | |
| 1043 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 1044 | { |
| 1045 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1046 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | void __user *argp = (void __user *)arg; |
| 1048 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1049 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1051 | sock = file->private_data; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1052 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1053 | net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1055 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1057 | #ifdef CONFIG_WEXT_CORE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1059 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1061 | #endif |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1062 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | case FIOSETOWN: |
| 1064 | case SIOCSPGRP: |
| 1065 | err = -EFAULT; |
| 1066 | if (get_user(pid, (int __user *)argp)) |
| 1067 | break; |
| 1068 | err = f_setown(sock->file, pid, 1); |
| 1069 | break; |
| 1070 | case FIOGETOWN: |
| 1071 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 1072 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1073 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1074 | break; |
| 1075 | case SIOCGIFBR: |
| 1076 | case SIOCSIFBR: |
| 1077 | case SIOCBRADDBR: |
| 1078 | case SIOCBRDELBR: |
| 1079 | err = -ENOPKG; |
| 1080 | if (!br_ioctl_hook) |
| 1081 | request_module("bridge"); |
| 1082 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1083 | mutex_lock(&br_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1084 | if (br_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1085 | err = br_ioctl_hook(net, cmd, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1086 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | break; |
| 1088 | case SIOCGIFVLAN: |
| 1089 | case SIOCSIFVLAN: |
| 1090 | err = -ENOPKG; |
| 1091 | if (!vlan_ioctl_hook) |
| 1092 | request_module("8021q"); |
| 1093 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1094 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1096 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1097 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | case SIOCADDDLCI: |
| 1100 | case SIOCDELDLCI: |
| 1101 | err = -ENOPKG; |
| 1102 | if (!dlci_ioctl_hook) |
| 1103 | request_module("dlci"); |
| 1104 | |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1105 | mutex_lock(&dlci_ioctl_mutex); |
| 1106 | if (dlci_ioctl_hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | err = dlci_ioctl_hook(cmd, argp); |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1108 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1109 | break; |
| 1110 | default: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1111 | err = sock_do_ioctl(net, sock, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1113 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | return err; |
| 1115 | } |
| 1116 | |
| 1117 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 1118 | { |
| 1119 | int err; |
| 1120 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | err = security_socket_create(family, type, protocol, 1); |
| 1123 | if (err) |
| 1124 | goto out; |
| 1125 | |
| 1126 | sock = sock_alloc(); |
| 1127 | if (!sock) { |
| 1128 | err = -ENOMEM; |
| 1129 | goto out; |
| 1130 | } |
| 1131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1133 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 1134 | if (err) |
| 1135 | goto out_release; |
| 1136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | out: |
| 1138 | *res = sock; |
| 1139 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1140 | out_release: |
| 1141 | sock_release(sock); |
| 1142 | sock = NULL; |
| 1143 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1145 | EXPORT_SYMBOL(sock_create_lite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | |
| 1147 | /* No kernel lock held - perfect */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1148 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | { |
| 1150 | struct socket *sock; |
| 1151 | |
| 1152 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1153 | * We can't return errors to poll, so it's either yes or no. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | */ |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1155 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | return sock->ops->poll(file, sock, wait); |
| 1157 | } |
| 1158 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1159 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1161 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | |
| 1163 | return sock->ops->mmap(file, sock, vma); |
| 1164 | } |
| 1165 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1166 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | sock_release(SOCKET_I(inode)); |
| 1169 | return 0; |
| 1170 | } |
| 1171 | |
| 1172 | /* |
| 1173 | * Update the socket async list |
| 1174 | * |
| 1175 | * Fasync_list locking strategy. |
| 1176 | * |
| 1177 | * 1. fasync_list is modified only under process context socket lock |
| 1178 | * i.e. under semaphore. |
| 1179 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1180 | * or under socket lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | */ |
| 1182 | |
| 1183 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1184 | { |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1185 | struct socket *sock = filp->private_data; |
| 1186 | struct sock *sk = sock->sk; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1187 | struct socket_wq *wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1189 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | |
| 1192 | lock_sock(sk); |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1193 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
| 1194 | fasync_helper(fd, filp, on, &wq->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1196 | if (!wq->fasync_list) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1197 | sock_reset_flag(sk, SOCK_FASYNC); |
Jonathan Corbet | 7639842 | 2009-02-01 14:26:59 -0700 | [diff] [blame] | 1198 | else |
Eric Dumazet | bcdce71 | 2009-10-06 17:28:29 -0700 | [diff] [blame] | 1199 | sock_set_flag(sk, SOCK_FASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1201 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | return 0; |
| 1203 | } |
| 1204 | |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1205 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | |
| 1207 | int sock_wake_async(struct socket *sock, int how, int band) |
| 1208 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1209 | struct socket_wq *wq; |
| 1210 | |
| 1211 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | return -1; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1213 | rcu_read_lock(); |
| 1214 | wq = rcu_dereference(sock->wq); |
| 1215 | if (!wq || !wq->fasync_list) { |
| 1216 | rcu_read_unlock(); |
| 1217 | return -1; |
| 1218 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1219 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1220 | case SOCK_WAKE_WAITD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1221 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
| 1222 | break; |
| 1223 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1224 | case SOCK_WAKE_SPACE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
| 1226 | break; |
| 1227 | /* fall through */ |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1228 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1229 | call_kill: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1230 | kill_fasync(&wq->fasync_list, SIGIO, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1232 | case SOCK_WAKE_URG: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1233 | kill_fasync(&wq->fasync_list, SIGURG, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | } |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1235 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1236 | return 0; |
| 1237 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1238 | EXPORT_SYMBOL(sock_wake_async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1240 | int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1241 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | { |
| 1243 | int err; |
| 1244 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1245 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | |
| 1247 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1248 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | */ |
| 1250 | if (family < 0 || family >= NPROTO) |
| 1251 | return -EAFNOSUPPORT; |
| 1252 | if (type < 0 || type >= SOCK_MAX) |
| 1253 | return -EINVAL; |
| 1254 | |
| 1255 | /* Compatibility. |
| 1256 | |
| 1257 | This uglymoron is moved from INET layer to here to avoid |
| 1258 | deadlock in module load. |
| 1259 | */ |
| 1260 | if (family == PF_INET && type == SOCK_PACKET) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1261 | static int warned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | if (!warned) { |
| 1263 | warned = 1; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1264 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1265 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | } |
| 1267 | family = PF_PACKET; |
| 1268 | } |
| 1269 | |
| 1270 | err = security_socket_create(family, type, protocol, kern); |
| 1271 | if (err) |
| 1272 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1273 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1274 | /* |
| 1275 | * Allocate the socket and allow the family to set things up. if |
| 1276 | * the protocol is 0, the family is instructed to select an appropriate |
| 1277 | * default. |
| 1278 | */ |
| 1279 | sock = sock_alloc(); |
| 1280 | if (!sock) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1281 | net_warn_ratelimited("socket: no more sockets\n"); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1282 | return -ENFILE; /* Not exactly a match, but its the |
| 1283 | closest posix thing */ |
| 1284 | } |
| 1285 | |
| 1286 | sock->type = type; |
| 1287 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1288 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1289 | /* Attempt to load a protocol module if the find failed. |
| 1290 | * |
| 1291 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | * requested real, full-featured networking support upon configuration. |
| 1293 | * Otherwise module support will break! |
| 1294 | */ |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 1295 | if (rcu_access_pointer(net_families[family]) == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1296 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1297 | #endif |
| 1298 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1299 | rcu_read_lock(); |
| 1300 | pf = rcu_dereference(net_families[family]); |
| 1301 | err = -EAFNOSUPPORT; |
| 1302 | if (!pf) |
| 1303 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
| 1305 | /* |
| 1306 | * We will call the ->create function, that possibly is in a loadable |
| 1307 | * module, so we have to bump that loadable module refcnt first. |
| 1308 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1309 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | goto out_release; |
| 1311 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1312 | /* Now protected by module ref count */ |
| 1313 | rcu_read_unlock(); |
| 1314 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 1315 | err = pf->create(net, sock, protocol, kern); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1316 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1318 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | /* |
| 1320 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1321 | * socket at sock_release time we decrement its refcnt. |
| 1322 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1323 | if (!try_module_get(sock->ops->owner)) |
| 1324 | goto out_module_busy; |
| 1325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | /* |
| 1327 | * Now that we're done with the ->create function, the [loadable] |
| 1328 | * module can have its refcnt decremented |
| 1329 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1330 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1331 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1332 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1333 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1334 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1336 | return 0; |
| 1337 | |
| 1338 | out_module_busy: |
| 1339 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1341 | sock->ops = NULL; |
| 1342 | module_put(pf->owner); |
| 1343 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1345 | return err; |
| 1346 | |
| 1347 | out_release: |
| 1348 | rcu_read_unlock(); |
| 1349 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1350 | } |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1351 | EXPORT_SYMBOL(__sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | |
| 1353 | int sock_create(int family, int type, int protocol, struct socket **res) |
| 1354 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1355 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1357 | EXPORT_SYMBOL(sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | |
| 1359 | int sock_create_kern(int family, int type, int protocol, struct socket **res) |
| 1360 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1361 | return __sock_create(&init_net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1363 | EXPORT_SYMBOL(sock_create_kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1365 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | { |
| 1367 | int retval; |
| 1368 | struct socket *sock; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1369 | int flags; |
| 1370 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1371 | /* Check the SOCK_* constants for consistency. */ |
| 1372 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1373 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1374 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1375 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1376 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1377 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1378 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1379 | return -EINVAL; |
| 1380 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1382 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1383 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | retval = sock_create(family, type, protocol, &sock); |
| 1386 | if (retval < 0) |
| 1387 | goto out; |
| 1388 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1389 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | if (retval < 0) |
| 1391 | goto out_release; |
| 1392 | |
| 1393 | out: |
| 1394 | /* It may be already another descriptor 8) Not kernel problem. */ |
| 1395 | return retval; |
| 1396 | |
| 1397 | out_release: |
| 1398 | sock_release(sock); |
| 1399 | return retval; |
| 1400 | } |
| 1401 | |
| 1402 | /* |
| 1403 | * Create a pair of connected sockets. |
| 1404 | */ |
| 1405 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1406 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
| 1407 | int __user *, usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | { |
| 1409 | struct socket *sock1, *sock2; |
| 1410 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1411 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1412 | int flags; |
| 1413 | |
| 1414 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1415 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1416 | return -EINVAL; |
| 1417 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1419 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1420 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | /* |
| 1423 | * Obtain the first socket and check if the underlying protocol |
| 1424 | * supports the socketpair call. |
| 1425 | */ |
| 1426 | |
| 1427 | err = sock_create(family, type, protocol, &sock1); |
| 1428 | if (err < 0) |
| 1429 | goto out; |
| 1430 | |
| 1431 | err = sock_create(family, type, protocol, &sock2); |
| 1432 | if (err < 0) |
| 1433 | goto out_release_1; |
| 1434 | |
| 1435 | err = sock1->ops->socketpair(sock1, sock2); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1436 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | goto out_release_both; |
| 1438 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1439 | fd1 = get_unused_fd_flags(flags); |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1440 | if (unlikely(fd1 < 0)) { |
| 1441 | err = fd1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | goto out_release_both; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1443 | } |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1444 | fd2 = get_unused_fd_flags(flags); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1445 | if (unlikely(fd2 < 0)) { |
| 1446 | err = fd2; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1447 | put_unused_fd(fd1); |
| 1448 | goto out_release_both; |
| 1449 | } |
| 1450 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1451 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1452 | if (unlikely(IS_ERR(newfile1))) { |
| 1453 | err = PTR_ERR(newfile1); |
| 1454 | put_unused_fd(fd1); |
| 1455 | put_unused_fd(fd2); |
| 1456 | goto out_release_both; |
| 1457 | } |
| 1458 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1459 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1460 | if (IS_ERR(newfile2)) { |
| 1461 | err = PTR_ERR(newfile2); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1462 | fput(newfile1); |
| 1463 | put_unused_fd(fd1); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1464 | put_unused_fd(fd2); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1465 | sock_release(sock2); |
| 1466 | goto out; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1467 | } |
| 1468 | |
Al Viro | 157cf64 | 2008-12-14 04:57:47 -0500 | [diff] [blame] | 1469 | audit_fd_pair(fd1, fd2); |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1470 | fd_install(fd1, newfile1); |
| 1471 | fd_install(fd2, newfile2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | /* fd1 and fd2 may be already another descriptors. |
| 1473 | * Not kernel problem. |
| 1474 | */ |
| 1475 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1476 | err = put_user(fd1, &usockvec[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | if (!err) |
| 1478 | err = put_user(fd2, &usockvec[1]); |
| 1479 | if (!err) |
| 1480 | return 0; |
| 1481 | |
| 1482 | sys_close(fd2); |
| 1483 | sys_close(fd1); |
| 1484 | return err; |
| 1485 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | out_release_both: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1487 | sock_release(sock2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | out_release_1: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1489 | sock_release(sock1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | out: |
| 1491 | return err; |
| 1492 | } |
| 1493 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | /* |
| 1495 | * Bind a name to a socket. Nothing much to do here since it's |
| 1496 | * the protocol's responsibility to handle the local address. |
| 1497 | * |
| 1498 | * We move the socket address to kernel space before we call |
| 1499 | * the protocol layer (having also checked the address is ok). |
| 1500 | */ |
| 1501 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1502 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | { |
| 1504 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1505 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1506 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1508 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1509 | if (sock) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1510 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1511 | if (err >= 0) { |
| 1512 | err = security_socket_bind(sock, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1513 | (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1514 | addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1515 | if (!err) |
| 1516 | err = sock->ops->bind(sock, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1517 | (struct sockaddr *) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1518 | &address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | } |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1520 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1521 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | return err; |
| 1523 | } |
| 1524 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | /* |
| 1526 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1527 | * necessary for a listen, and if that works, we mark the socket as |
| 1528 | * ready for listening. |
| 1529 | */ |
| 1530 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1531 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | { |
| 1533 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1534 | int err, fput_needed; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1535 | int somaxconn; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1536 | |
| 1537 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1538 | if (sock) { |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 1539 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1540 | if ((unsigned int)backlog > somaxconn) |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1541 | backlog = somaxconn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | |
| 1543 | err = security_socket_listen(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1544 | if (!err) |
| 1545 | err = sock->ops->listen(sock, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1547 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | } |
| 1549 | return err; |
| 1550 | } |
| 1551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | /* |
| 1553 | * For accept, we attempt to create a new socket, set up the link |
| 1554 | * with the client, wake up the client, then return the new |
| 1555 | * connected fd. We collect the address of the connector in kernel |
| 1556 | * space and move it to user at the very end. This is unclean because |
| 1557 | * we open the socket then return an error. |
| 1558 | * |
| 1559 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 1560 | * status to recvmsg. We need to add that support in a way thats |
| 1561 | * clean when we restucture accept also. |
| 1562 | */ |
| 1563 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1564 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1565 | int __user *, upeer_addrlen, int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | { |
| 1567 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1568 | struct file *newfile; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1569 | int err, len, newfd, fput_needed; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1570 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1572 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1573 | return -EINVAL; |
| 1574 | |
| 1575 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1576 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1577 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1578 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | if (!sock) |
| 1580 | goto out; |
| 1581 | |
| 1582 | err = -ENFILE; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1583 | newsock = sock_alloc(); |
| 1584 | if (!newsock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | goto out_put; |
| 1586 | |
| 1587 | newsock->type = sock->type; |
| 1588 | newsock->ops = sock->ops; |
| 1589 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1590 | /* |
| 1591 | * We don't need try_module_get here, as the listening socket (sock) |
| 1592 | * has the protocol module (sock->ops->owner) held. |
| 1593 | */ |
| 1594 | __module_get(newsock->ops->owner); |
| 1595 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1596 | newfd = get_unused_fd_flags(flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1597 | if (unlikely(newfd < 0)) { |
| 1598 | err = newfd; |
David S. Miller | 9a1875e | 2006-04-01 12:48:36 -0800 | [diff] [blame] | 1599 | sock_release(newsock); |
| 1600 | goto out_put; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1601 | } |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1602 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1603 | if (unlikely(IS_ERR(newfile))) { |
| 1604 | err = PTR_ERR(newfile); |
| 1605 | put_unused_fd(newfd); |
| 1606 | sock_release(newsock); |
| 1607 | goto out_put; |
| 1608 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1609 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1610 | err = security_socket_accept(sock, newsock); |
| 1611 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1612 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
| 1615 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1616 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1617 | |
| 1618 | if (upeer_sockaddr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1619 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1620 | &len, 2) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1622 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | } |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1624 | err = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1625 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1627 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | } |
| 1629 | |
| 1630 | /* File flags are not inherited via accept() unlike another OSes. */ |
| 1631 | |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1632 | fd_install(newfd, newfile); |
| 1633 | err = newfd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1636 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | out: |
| 1638 | return err; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1639 | out_fd: |
David S. Miller | 9606a21 | 2006-04-01 01:00:14 -0800 | [diff] [blame] | 1640 | fput(newfile); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1641 | put_unused_fd(newfd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | goto out_put; |
| 1643 | } |
| 1644 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1645 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1646 | int __user *, upeer_addrlen) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1647 | { |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 1648 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1649 | } |
| 1650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | /* |
| 1652 | * Attempt to connect to a socket with the server address. The address |
| 1653 | * is in user space so we verify it is OK and move it to kernel space. |
| 1654 | * |
| 1655 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 1656 | * break bindings |
| 1657 | * |
| 1658 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 1659 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 1660 | * include the -EINPROGRESS status for such sockets. |
| 1661 | */ |
| 1662 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1663 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
| 1664 | int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | { |
| 1666 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1667 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1668 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1670 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | if (!sock) |
| 1672 | goto out; |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1673 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | if (err < 0) |
| 1675 | goto out_put; |
| 1676 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1677 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1678 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | if (err) |
| 1680 | goto out_put; |
| 1681 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1682 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | sock->file->f_flags); |
| 1684 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1685 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | out: |
| 1687 | return err; |
| 1688 | } |
| 1689 | |
| 1690 | /* |
| 1691 | * Get the local address ('name') of a socket object. Move the obtained |
| 1692 | * name to user space. |
| 1693 | */ |
| 1694 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1695 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
| 1696 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | { |
| 1698 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1699 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1700 | int len, err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1701 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1702 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | if (!sock) |
| 1704 | goto out; |
| 1705 | |
| 1706 | err = security_socket_getsockname(sock); |
| 1707 | if (err) |
| 1708 | goto out_put; |
| 1709 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1710 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | if (err) |
| 1712 | goto out_put; |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1713 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | |
| 1715 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1716 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | out: |
| 1718 | return err; |
| 1719 | } |
| 1720 | |
| 1721 | /* |
| 1722 | * Get the remote address ('name') of a socket object. Move the obtained |
| 1723 | * name to user space. |
| 1724 | */ |
| 1725 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1726 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
| 1727 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | { |
| 1729 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1730 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1731 | int len, err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1733 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1734 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | err = security_socket_getpeername(sock); |
| 1736 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1737 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | return err; |
| 1739 | } |
| 1740 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1741 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1742 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1743 | 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | if (!err) |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1745 | err = move_addr_to_user(&address, len, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1746 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1747 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | } |
| 1749 | return err; |
| 1750 | } |
| 1751 | |
| 1752 | /* |
| 1753 | * Send a datagram to a given address. We move the address into kernel |
| 1754 | * space and check the user space data area is readable before invoking |
| 1755 | * the protocol. |
| 1756 | */ |
| 1757 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1758 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1759 | unsigned int, flags, struct sockaddr __user *, addr, |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1760 | int, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | { |
| 1762 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1763 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | int err; |
| 1765 | struct msghdr msg; |
| 1766 | struct iovec iov; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1767 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1768 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1769 | if (len > INT_MAX) |
| 1770 | len = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1771 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1772 | if (!sock) |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1773 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1774 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1775 | iov.iov_base = buff; |
| 1776 | iov.iov_len = len; |
| 1777 | msg.msg_name = NULL; |
| 1778 | msg.msg_iov = &iov; |
| 1779 | msg.msg_iovlen = 1; |
| 1780 | msg.msg_control = NULL; |
| 1781 | msg.msg_controllen = 0; |
| 1782 | msg.msg_namelen = 0; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1783 | if (addr) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1784 | err = move_addr_to_kernel(addr, addr_len, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | if (err < 0) |
| 1786 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1787 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1788 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | } |
| 1790 | if (sock->file->f_flags & O_NONBLOCK) |
| 1791 | flags |= MSG_DONTWAIT; |
| 1792 | msg.msg_flags = flags; |
| 1793 | err = sock_sendmsg(sock, &msg, len); |
| 1794 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1795 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1796 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1797 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | return err; |
| 1799 | } |
| 1800 | |
| 1801 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1802 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | */ |
| 1804 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1805 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1806 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | { |
| 1808 | return sys_sendto(fd, buff, len, flags, NULL, 0); |
| 1809 | } |
| 1810 | |
| 1811 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1812 | * Receive a frame from the socket and optionally record the address of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | * sender. We verify the buffers are writable and if needed move the |
| 1814 | * sender address from kernel to user space. |
| 1815 | */ |
| 1816 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1817 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1818 | unsigned int, flags, struct sockaddr __user *, addr, |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1819 | int __user *, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | { |
| 1821 | struct socket *sock; |
| 1822 | struct iovec iov; |
| 1823 | struct msghdr msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1824 | struct sockaddr_storage address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1825 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1826 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1828 | if (size > INT_MAX) |
| 1829 | size = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1830 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | if (!sock) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1832 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1834 | msg.msg_control = NULL; |
| 1835 | msg.msg_controllen = 0; |
| 1836 | msg.msg_iovlen = 1; |
| 1837 | msg.msg_iov = &iov; |
| 1838 | iov.iov_len = size; |
| 1839 | iov.iov_base = ubuf; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1840 | msg.msg_name = (struct sockaddr *)&address; |
| 1841 | msg.msg_namelen = sizeof(address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | if (sock->file->f_flags & O_NONBLOCK) |
| 1843 | flags |= MSG_DONTWAIT; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1844 | err = sock_recvmsg(sock, &msg, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1846 | if (err >= 0 && addr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1847 | err2 = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1848 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1849 | if (err2 < 0) |
| 1850 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1852 | |
| 1853 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1854 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | return err; |
| 1856 | } |
| 1857 | |
| 1858 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1859 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | */ |
| 1861 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1862 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1863 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | { |
| 1865 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
| 1866 | } |
| 1867 | |
| 1868 | /* |
| 1869 | * Set a socket option. Because we don't know the option lengths we have |
| 1870 | * to pass the user mode parameter for the protocols to sort out. |
| 1871 | */ |
| 1872 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1873 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| 1874 | char __user *, optval, int, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1876 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | struct socket *sock; |
| 1878 | |
| 1879 | if (optlen < 0) |
| 1880 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1881 | |
| 1882 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1883 | if (sock != NULL) { |
| 1884 | err = security_socket_setsockopt(sock, level, optname); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1885 | if (err) |
| 1886 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | |
| 1888 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1889 | err = |
| 1890 | sock_setsockopt(sock, level, optname, optval, |
| 1891 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1893 | err = |
| 1894 | sock->ops->setsockopt(sock, level, optname, optval, |
| 1895 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1896 | out_put: |
| 1897 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | } |
| 1899 | return err; |
| 1900 | } |
| 1901 | |
| 1902 | /* |
| 1903 | * Get a socket option. Because we don't know the option lengths we have |
| 1904 | * to pass a user mode parameter for the protocols to sort out. |
| 1905 | */ |
| 1906 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1907 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| 1908 | char __user *, optval, int __user *, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1910 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | struct socket *sock; |
| 1912 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1913 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1914 | if (sock != NULL) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1915 | err = security_socket_getsockopt(sock, level, optname); |
| 1916 | if (err) |
| 1917 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | |
| 1919 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1920 | err = |
| 1921 | sock_getsockopt(sock, level, optname, optval, |
| 1922 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1924 | err = |
| 1925 | sock->ops->getsockopt(sock, level, optname, optval, |
| 1926 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1927 | out_put: |
| 1928 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | } |
| 1930 | return err; |
| 1931 | } |
| 1932 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | /* |
| 1934 | * Shutdown a socket. |
| 1935 | */ |
| 1936 | |
Heiko Carstens | 754fe8d | 2009-01-14 14:14:09 +0100 | [diff] [blame] | 1937 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1939 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | struct socket *sock; |
| 1941 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1942 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1943 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | err = security_socket_shutdown(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1945 | if (!err) |
| 1946 | err = sock->ops->shutdown(sock, how); |
| 1947 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | } |
| 1949 | return err; |
| 1950 | } |
| 1951 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1952 | /* A couple of helpful macros for getting the address of the 32/64 bit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | * fields which are the same type (int / unsigned) on our platforms. |
| 1954 | */ |
| 1955 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 1956 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 1957 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 1958 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1959 | struct used_address { |
| 1960 | struct sockaddr_storage name; |
| 1961 | unsigned int name_len; |
| 1962 | }; |
| 1963 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 1964 | static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1965 | struct msghdr *msg_sys, unsigned int flags, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1966 | struct used_address *used_address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1968 | struct compat_msghdr __user *msg_compat = |
| 1969 | (struct compat_msghdr __user *)msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1970 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 1972 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1973 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
| 1974 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | unsigned char *ctl_buf = ctl; |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 1976 | int err, ctl_len, total_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1977 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | err = -EFAULT; |
| 1979 | if (MSG_CMSG_COMPAT & flags) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1980 | if (get_compat_msghdr(msg_sys, msg_compat)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | return -EFAULT; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1982 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | return -EFAULT; |
| 1984 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1985 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 1986 | err = -EMSGSIZE; |
| 1987 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
| 1988 | goto out; |
| 1989 | err = -ENOMEM; |
| 1990 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), |
| 1991 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | if (!iov) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1993 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | } |
| 1995 | |
| 1996 | /* This will also move the address data into kernel space */ |
| 1997 | if (MSG_CMSG_COMPAT & flags) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1998 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | } else |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2000 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2001 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | goto out_freeiov; |
| 2003 | total_len = err; |
| 2004 | |
| 2005 | err = -ENOBUFS; |
| 2006 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2007 | if (msg_sys->msg_controllen > INT_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2008 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2009 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2011 | err = |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2012 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2013 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | if (err) |
| 2015 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2016 | ctl_buf = msg_sys->msg_control; |
| 2017 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | } else if (ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2019 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2021 | if (ctl_buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | goto out_freeiov; |
| 2023 | } |
| 2024 | err = -EFAULT; |
| 2025 | /* |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2026 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
| 2028 | * checking falls down on this. |
| 2029 | */ |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 2030 | if (copy_from_user(ctl_buf, |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2031 | (void __user __force *)msg_sys->msg_control, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2032 | ctl_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | goto out_freectl; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2034 | msg_sys->msg_control = ctl_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2035 | } |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2036 | msg_sys->msg_flags = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | |
| 2038 | if (sock->file->f_flags & O_NONBLOCK) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2039 | msg_sys->msg_flags |= MSG_DONTWAIT; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2040 | /* |
| 2041 | * If this is sendmmsg() and current destination address is same as |
| 2042 | * previously succeeded address, omit asking LSM's decision. |
| 2043 | * used_address->name_len is initialized to UINT_MAX so that the first |
| 2044 | * destination address never matches. |
| 2045 | */ |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2046 | if (used_address && msg_sys->msg_name && |
| 2047 | used_address->name_len == msg_sys->msg_namelen && |
| 2048 | !memcmp(&used_address->name, msg_sys->msg_name, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2049 | used_address->name_len)) { |
| 2050 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); |
| 2051 | goto out_freectl; |
| 2052 | } |
| 2053 | err = sock_sendmsg(sock, msg_sys, total_len); |
| 2054 | /* |
| 2055 | * If this is sendmmsg() and sending to current destination address was |
| 2056 | * successful, remember it. |
| 2057 | */ |
| 2058 | if (used_address && err >= 0) { |
| 2059 | used_address->name_len = msg_sys->msg_namelen; |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2060 | if (msg_sys->msg_name) |
| 2061 | memcpy(&used_address->name, msg_sys->msg_name, |
| 2062 | used_address->name_len); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2063 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | |
| 2065 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2066 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
| 2068 | out_freeiov: |
| 2069 | if (iov != iovstack) |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2070 | kfree(iov); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2071 | out: |
| 2072 | return err; |
| 2073 | } |
| 2074 | |
| 2075 | /* |
| 2076 | * BSD sendmsg interface |
| 2077 | */ |
| 2078 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2079 | long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2080 | { |
| 2081 | int fput_needed, err; |
| 2082 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2083 | struct socket *sock; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2084 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2085 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2086 | if (!sock) |
| 2087 | goto out; |
| 2088 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2089 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2090 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2091 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2092 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | return err; |
| 2094 | } |
| 2095 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2096 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
| 2097 | { |
| 2098 | if (flags & MSG_CMSG_COMPAT) |
| 2099 | return -EINVAL; |
| 2100 | return __sys_sendmsg(fd, msg, flags); |
| 2101 | } |
| 2102 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2103 | /* |
| 2104 | * Linux sendmmsg interface |
| 2105 | */ |
| 2106 | |
| 2107 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2108 | unsigned int flags) |
| 2109 | { |
| 2110 | int fput_needed, err, datagrams; |
| 2111 | struct socket *sock; |
| 2112 | struct mmsghdr __user *entry; |
| 2113 | struct compat_mmsghdr __user *compat_entry; |
| 2114 | struct msghdr msg_sys; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2115 | struct used_address used_address; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2116 | |
Anton Blanchard | 98382f4 | 2011-08-04 14:07:39 +0000 | [diff] [blame] | 2117 | if (vlen > UIO_MAXIOV) |
| 2118 | vlen = UIO_MAXIOV; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2119 | |
| 2120 | datagrams = 0; |
| 2121 | |
| 2122 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2123 | if (!sock) |
| 2124 | return err; |
| 2125 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2126 | used_address.name_len = UINT_MAX; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2127 | entry = mmsg; |
| 2128 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2129 | err = 0; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2130 | |
| 2131 | while (datagrams < vlen) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2132 | if (MSG_CMSG_COMPAT & flags) { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2133 | err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
| 2134 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2135 | if (err < 0) |
| 2136 | break; |
| 2137 | err = __put_user(err, &compat_entry->msg_len); |
| 2138 | ++compat_entry; |
| 2139 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2140 | err = ___sys_sendmsg(sock, |
| 2141 | (struct msghdr __user *)entry, |
| 2142 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2143 | if (err < 0) |
| 2144 | break; |
| 2145 | err = put_user(err, &entry->msg_len); |
| 2146 | ++entry; |
| 2147 | } |
| 2148 | |
| 2149 | if (err) |
| 2150 | break; |
| 2151 | ++datagrams; |
| 2152 | } |
| 2153 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2154 | fput_light(sock->file, fput_needed); |
| 2155 | |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2156 | /* We only return an error if no datagrams were able to be sent */ |
| 2157 | if (datagrams != 0) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2158 | return datagrams; |
| 2159 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2160 | return err; |
| 2161 | } |
| 2162 | |
| 2163 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2164 | unsigned int, vlen, unsigned int, flags) |
| 2165 | { |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2166 | if (flags & MSG_CMSG_COMPAT) |
| 2167 | return -EINVAL; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2168 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
| 2169 | } |
| 2170 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2171 | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2172 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2174 | struct compat_msghdr __user *msg_compat = |
| 2175 | (struct compat_msghdr __user *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2176 | struct iovec iovstack[UIO_FASTIOV]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2177 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | unsigned long cmsg_ptr; |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2179 | int err, total_len, len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2180 | |
| 2181 | /* kernel mode address */ |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2182 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | |
| 2184 | /* user mode address pointers */ |
| 2185 | struct sockaddr __user *uaddr; |
| 2186 | int __user *uaddr_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2188 | if (MSG_CMSG_COMPAT & flags) { |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2189 | if (get_compat_msghdr(msg_sys, msg_compat)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2190 | return -EFAULT; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2191 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2192 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2194 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2195 | err = -EMSGSIZE; |
| 2196 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
| 2197 | goto out; |
| 2198 | err = -ENOMEM; |
| 2199 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), |
| 2200 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2201 | if (!iov) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2202 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | } |
| 2204 | |
| 2205 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2206 | * Save the user-mode address (verify_iovec will change the |
| 2207 | * kernel msghdr to use the kernel address space) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2208 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2209 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2210 | uaddr = (__force void __user *)msg_sys->msg_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | uaddr_len = COMPAT_NAMELEN(msg); |
| 2212 | if (MSG_CMSG_COMPAT & flags) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2213 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | } else |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2215 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2216 | if (err < 0) |
| 2217 | goto out_freeiov; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2218 | total_len = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2220 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
| 2221 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2222 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | if (sock->file->f_flags & O_NONBLOCK) |
| 2224 | flags |= MSG_DONTWAIT; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2225 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
| 2226 | total_len, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | if (err < 0) |
| 2228 | goto out_freeiov; |
| 2229 | len = err; |
| 2230 | |
| 2231 | if (uaddr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2232 | err = move_addr_to_user(&addr, |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2233 | msg_sys->msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2234 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | if (err < 0) |
| 2236 | goto out_freeiov; |
| 2237 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2238 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2239 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | if (err) |
| 2241 | goto out_freeiov; |
| 2242 | if (MSG_CMSG_COMPAT & flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2243 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2244 | &msg_compat->msg_controllen); |
| 2245 | else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2246 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2247 | &msg->msg_controllen); |
| 2248 | if (err) |
| 2249 | goto out_freeiov; |
| 2250 | err = len; |
| 2251 | |
| 2252 | out_freeiov: |
| 2253 | if (iov != iovstack) |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2254 | kfree(iov); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2255 | out: |
| 2256 | return err; |
| 2257 | } |
| 2258 | |
| 2259 | /* |
| 2260 | * BSD recvmsg interface |
| 2261 | */ |
| 2262 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2263 | long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2264 | { |
| 2265 | int fput_needed, err; |
| 2266 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2267 | struct socket *sock; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2268 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2269 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2270 | if (!sock) |
| 2271 | goto out; |
| 2272 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2273 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2274 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2275 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | out: |
| 2277 | return err; |
| 2278 | } |
| 2279 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2280 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
| 2281 | unsigned int, flags) |
| 2282 | { |
| 2283 | if (flags & MSG_CMSG_COMPAT) |
| 2284 | return -EINVAL; |
| 2285 | return __sys_recvmsg(fd, msg, flags); |
| 2286 | } |
| 2287 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2288 | /* |
| 2289 | * Linux recvmmsg interface |
| 2290 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2291 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2292 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2293 | unsigned int flags, struct timespec *timeout) |
| 2294 | { |
| 2295 | int fput_needed, err, datagrams; |
| 2296 | struct socket *sock; |
| 2297 | struct mmsghdr __user *entry; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2298 | struct compat_mmsghdr __user *compat_entry; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2299 | struct msghdr msg_sys; |
| 2300 | struct timespec end_time; |
| 2301 | |
| 2302 | if (timeout && |
| 2303 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
| 2304 | timeout->tv_nsec)) |
| 2305 | return -EINVAL; |
| 2306 | |
| 2307 | datagrams = 0; |
| 2308 | |
| 2309 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2310 | if (!sock) |
| 2311 | return err; |
| 2312 | |
| 2313 | err = sock_error(sock->sk); |
| 2314 | if (err) |
| 2315 | goto out_put; |
| 2316 | |
| 2317 | entry = mmsg; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2318 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2319 | |
| 2320 | while (datagrams < vlen) { |
| 2321 | /* |
| 2322 | * No need to ask LSM for more than the first datagram. |
| 2323 | */ |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2324 | if (MSG_CMSG_COMPAT & flags) { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2325 | err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
| 2326 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2327 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2328 | if (err < 0) |
| 2329 | break; |
| 2330 | err = __put_user(err, &compat_entry->msg_len); |
| 2331 | ++compat_entry; |
| 2332 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2333 | err = ___sys_recvmsg(sock, |
| 2334 | (struct msghdr __user *)entry, |
| 2335 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2336 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2337 | if (err < 0) |
| 2338 | break; |
| 2339 | err = put_user(err, &entry->msg_len); |
| 2340 | ++entry; |
| 2341 | } |
| 2342 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2343 | if (err) |
| 2344 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2345 | ++datagrams; |
| 2346 | |
Brandon L Black | 71c5c15 | 2010-03-26 16:18:03 +0000 | [diff] [blame] | 2347 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
| 2348 | if (flags & MSG_WAITFORONE) |
| 2349 | flags |= MSG_DONTWAIT; |
| 2350 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2351 | if (timeout) { |
| 2352 | ktime_get_ts(timeout); |
| 2353 | *timeout = timespec_sub(end_time, *timeout); |
| 2354 | if (timeout->tv_sec < 0) { |
| 2355 | timeout->tv_sec = timeout->tv_nsec = 0; |
| 2356 | break; |
| 2357 | } |
| 2358 | |
| 2359 | /* Timeout, return less than vlen datagrams */ |
| 2360 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
| 2361 | break; |
| 2362 | } |
| 2363 | |
| 2364 | /* Out of band data, return right away */ |
| 2365 | if (msg_sys.msg_flags & MSG_OOB) |
| 2366 | break; |
| 2367 | } |
| 2368 | |
| 2369 | out_put: |
| 2370 | fput_light(sock->file, fput_needed); |
| 2371 | |
| 2372 | if (err == 0) |
| 2373 | return datagrams; |
| 2374 | |
| 2375 | if (datagrams != 0) { |
| 2376 | /* |
| 2377 | * We may return less entries than requested (vlen) if the |
| 2378 | * sock is non block and there aren't enough datagrams... |
| 2379 | */ |
| 2380 | if (err != -EAGAIN) { |
| 2381 | /* |
| 2382 | * ... or if recvmsg returns an error after we |
| 2383 | * received some datagrams, where we record the |
| 2384 | * error to return on the next call or if the |
| 2385 | * app asks about it using getsockopt(SO_ERROR). |
| 2386 | */ |
| 2387 | sock->sk->sk_err = -err; |
| 2388 | } |
| 2389 | |
| 2390 | return datagrams; |
| 2391 | } |
| 2392 | |
| 2393 | return err; |
| 2394 | } |
| 2395 | |
| 2396 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2397 | unsigned int, vlen, unsigned int, flags, |
| 2398 | struct timespec __user *, timeout) |
| 2399 | { |
| 2400 | int datagrams; |
| 2401 | struct timespec timeout_sys; |
| 2402 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2403 | if (flags & MSG_CMSG_COMPAT) |
| 2404 | return -EINVAL; |
| 2405 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2406 | if (!timeout) |
| 2407 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); |
| 2408 | |
| 2409 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) |
| 2410 | return -EFAULT; |
| 2411 | |
| 2412 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
| 2413 | |
| 2414 | if (datagrams > 0 && |
| 2415 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) |
| 2416 | datagrams = -EFAULT; |
| 2417 | |
| 2418 | return datagrams; |
| 2419 | } |
| 2420 | |
| 2421 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2422 | /* Argument list sizes for sys_socketcall */ |
| 2423 | #define AL(x) ((x) * sizeof(unsigned long)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2424 | static const unsigned char nargs[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2425 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 2426 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 2427 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2428 | AL(4), AL(5), AL(4) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2429 | }; |
| 2430 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | #undef AL |
| 2432 | |
| 2433 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2434 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | * |
| 2436 | * Argument checking cleaned up. Saved 20% in size. |
| 2437 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2438 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2439 | */ |
| 2440 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 2441 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2442 | { |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 2443 | unsigned long a[AUDITSC_ARGS]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2444 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | int err; |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2446 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2447 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2448 | if (call < 1 || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2449 | return -EINVAL; |
| 2450 | |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2451 | len = nargs[call]; |
| 2452 | if (len > sizeof(a)) |
| 2453 | return -EINVAL; |
| 2454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2455 | /* copy_from_user should be SMP safe. */ |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2456 | if (copy_from_user(a, args, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2458 | |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 2459 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
| 2460 | if (err) |
| 2461 | return err; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2462 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2463 | a0 = a[0]; |
| 2464 | a1 = a[1]; |
| 2465 | |
| 2466 | switch (call) { |
| 2467 | case SYS_SOCKET: |
| 2468 | err = sys_socket(a0, a1, a[2]); |
| 2469 | break; |
| 2470 | case SYS_BIND: |
| 2471 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
| 2472 | break; |
| 2473 | case SYS_CONNECT: |
| 2474 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
| 2475 | break; |
| 2476 | case SYS_LISTEN: |
| 2477 | err = sys_listen(a0, a1); |
| 2478 | break; |
| 2479 | case SYS_ACCEPT: |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2480 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2481 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2482 | break; |
| 2483 | case SYS_GETSOCKNAME: |
| 2484 | err = |
| 2485 | sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 2486 | (int __user *)a[2]); |
| 2487 | break; |
| 2488 | case SYS_GETPEERNAME: |
| 2489 | err = |
| 2490 | sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 2491 | (int __user *)a[2]); |
| 2492 | break; |
| 2493 | case SYS_SOCKETPAIR: |
| 2494 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
| 2495 | break; |
| 2496 | case SYS_SEND: |
| 2497 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); |
| 2498 | break; |
| 2499 | case SYS_SENDTO: |
| 2500 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 2501 | (struct sockaddr __user *)a[4], a[5]); |
| 2502 | break; |
| 2503 | case SYS_RECV: |
| 2504 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); |
| 2505 | break; |
| 2506 | case SYS_RECVFROM: |
| 2507 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 2508 | (struct sockaddr __user *)a[4], |
| 2509 | (int __user *)a[5]); |
| 2510 | break; |
| 2511 | case SYS_SHUTDOWN: |
| 2512 | err = sys_shutdown(a0, a1); |
| 2513 | break; |
| 2514 | case SYS_SETSOCKOPT: |
| 2515 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
| 2516 | break; |
| 2517 | case SYS_GETSOCKOPT: |
| 2518 | err = |
| 2519 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 2520 | (int __user *)a[4]); |
| 2521 | break; |
| 2522 | case SYS_SENDMSG: |
| 2523 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2524 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2525 | case SYS_SENDMMSG: |
| 2526 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); |
| 2527 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2528 | case SYS_RECVMSG: |
| 2529 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2530 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2531 | case SYS_RECVMMSG: |
| 2532 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], |
| 2533 | (struct timespec __user *)a[4]); |
| 2534 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2535 | case SYS_ACCEPT4: |
| 2536 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2537 | (int __user *)a[2], a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2538 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2539 | default: |
| 2540 | err = -EINVAL; |
| 2541 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | } |
| 2543 | return err; |
| 2544 | } |
| 2545 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2546 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2547 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2548 | /** |
| 2549 | * sock_register - add a socket protocol handler |
| 2550 | * @ops: description of protocol |
| 2551 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | * This function is called by a protocol handler that wants to |
| 2553 | * advertise its address family, and have it linked into the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2554 | * socket interface. The value ops->family coresponds to the |
| 2555 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2556 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2557 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | { |
| 2559 | int err; |
| 2560 | |
| 2561 | if (ops->family >= NPROTO) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2562 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
| 2563 | NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2564 | return -ENOBUFS; |
| 2565 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2566 | |
| 2567 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 2568 | if (rcu_dereference_protected(net_families[ops->family], |
| 2569 | lockdep_is_held(&net_family_lock))) |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2570 | err = -EEXIST; |
| 2571 | else { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 2572 | rcu_assign_pointer(net_families[ops->family], ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2573 | err = 0; |
| 2574 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2575 | spin_unlock(&net_family_lock); |
| 2576 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2577 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | return err; |
| 2579 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2580 | EXPORT_SYMBOL(sock_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2582 | /** |
| 2583 | * sock_unregister - remove a protocol handler |
| 2584 | * @family: protocol family to remove |
| 2585 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2586 | * This function is called by a protocol handler that wants to |
| 2587 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2588 | * new socket creation. |
| 2589 | * |
| 2590 | * If protocol handler is a module, then it can use module reference |
| 2591 | * counts to protect against new references. If protocol handler is not |
| 2592 | * a module then it needs to provide its own protection in |
| 2593 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2594 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2595 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2597 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2599 | spin_lock(&net_family_lock); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 2600 | RCU_INIT_POINTER(net_families[family], NULL); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2601 | spin_unlock(&net_family_lock); |
| 2602 | |
| 2603 | synchronize_rcu(); |
| 2604 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2605 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2606 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2607 | EXPORT_SYMBOL(sock_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2609 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | { |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2611 | int err; |
Eric W. Biederman | 2ca794e | 2012-04-19 13:20:32 +0000 | [diff] [blame] | 2612 | /* |
| 2613 | * Initialize the network sysctl infrastructure. |
| 2614 | */ |
| 2615 | err = net_sysctl_init(); |
| 2616 | if (err) |
| 2617 | goto out; |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2618 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2620 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2621 | */ |
| 2622 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2623 | |
| 2624 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2625 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2626 | */ |
| 2627 | |
| 2628 | init_inodecache(); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2629 | |
| 2630 | err = register_filesystem(&sock_fs_type); |
| 2631 | if (err) |
| 2632 | goto out_fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | sock_mnt = kern_mount(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2634 | if (IS_ERR(sock_mnt)) { |
| 2635 | err = PTR_ERR(sock_mnt); |
| 2636 | goto out_mount; |
| 2637 | } |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2638 | |
| 2639 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2640 | */ |
| 2641 | |
| 2642 | #ifdef CONFIG_NETFILTER |
Pablo Neira Ayuso | 6d11cfd | 2013-05-22 22:42:36 +0000 | [diff] [blame] | 2643 | err = netfilter_init(); |
| 2644 | if (err) |
| 2645 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 2647 | |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 2648 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
| 2649 | skb_timestamping_init(); |
| 2650 | #endif |
| 2651 | |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2652 | out: |
| 2653 | return err; |
| 2654 | |
| 2655 | out_mount: |
| 2656 | unregister_filesystem(&sock_fs_type); |
| 2657 | out_fs: |
| 2658 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | } |
| 2660 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2661 | core_initcall(sock_init); /* early initcall */ |
| 2662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | #ifdef CONFIG_PROC_FS |
| 2664 | void socket_seq_show(struct seq_file *seq) |
| 2665 | { |
| 2666 | int cpu; |
| 2667 | int counter = 0; |
| 2668 | |
KAMEZAWA Hiroyuki | 6f91204 | 2006-04-10 22:52:50 -0700 | [diff] [blame] | 2669 | for_each_possible_cpu(cpu) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2670 | counter += per_cpu(sockets_in_use, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2671 | |
| 2672 | /* It can be negative, by the way. 8) */ |
| 2673 | if (counter < 0) |
| 2674 | counter = 0; |
| 2675 | |
| 2676 | seq_printf(seq, "sockets: used %d\n", counter); |
| 2677 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2678 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2679 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2680 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2681 | static int do_siocgstamp(struct net *net, struct socket *sock, |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2682 | unsigned int cmd, void __user *up) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2683 | { |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2684 | mm_segment_t old_fs = get_fs(); |
| 2685 | struct timeval ktv; |
| 2686 | int err; |
| 2687 | |
| 2688 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2689 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2690 | set_fs(old_fs); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2691 | if (!err) |
Mikulas Patocka | ed6fe9d | 2012-09-01 12:34:07 -0400 | [diff] [blame] | 2692 | err = compat_put_timeval(&ktv, up); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2693 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2694 | return err; |
| 2695 | } |
| 2696 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2697 | static int do_siocgstampns(struct net *net, struct socket *sock, |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2698 | unsigned int cmd, void __user *up) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2699 | { |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2700 | mm_segment_t old_fs = get_fs(); |
| 2701 | struct timespec kts; |
| 2702 | int err; |
| 2703 | |
| 2704 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2705 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2706 | set_fs(old_fs); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2707 | if (!err) |
Mikulas Patocka | ed6fe9d | 2012-09-01 12:34:07 -0400 | [diff] [blame] | 2708 | err = compat_put_timespec(&kts, up); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2709 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2710 | return err; |
| 2711 | } |
| 2712 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2713 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2714 | { |
| 2715 | struct ifreq __user *uifr; |
| 2716 | int err; |
| 2717 | |
| 2718 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2719 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2720 | return -EFAULT; |
| 2721 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2722 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2723 | if (err) |
| 2724 | return err; |
| 2725 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2726 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2727 | return -EFAULT; |
| 2728 | |
| 2729 | return 0; |
| 2730 | } |
| 2731 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2732 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2733 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2734 | struct compat_ifconf ifc32; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2735 | struct ifconf ifc; |
| 2736 | struct ifconf __user *uifc; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2737 | struct compat_ifreq __user *ifr32; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2738 | struct ifreq __user *ifr; |
| 2739 | unsigned int i, j; |
| 2740 | int err; |
| 2741 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2742 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2743 | return -EFAULT; |
| 2744 | |
Mathias Krause | 43da5f2 | 2012-08-15 11:31:57 +0000 | [diff] [blame] | 2745 | memset(&ifc, 0, sizeof(ifc)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2746 | if (ifc32.ifcbuf == 0) { |
| 2747 | ifc32.ifc_len = 0; |
| 2748 | ifc.ifc_len = 0; |
| 2749 | ifc.ifc_req = NULL; |
| 2750 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); |
| 2751 | } else { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2752 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
| 2753 | sizeof(struct ifreq); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2754 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
| 2755 | ifc.ifc_len = len; |
| 2756 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); |
| 2757 | ifr32 = compat_ptr(ifc32.ifcbuf); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2758 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2759 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2760 | return -EFAULT; |
| 2761 | ifr++; |
| 2762 | ifr32++; |
| 2763 | } |
| 2764 | } |
| 2765 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) |
| 2766 | return -EFAULT; |
| 2767 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2768 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2769 | if (err) |
| 2770 | return err; |
| 2771 | |
| 2772 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) |
| 2773 | return -EFAULT; |
| 2774 | |
| 2775 | ifr = ifc.ifc_req; |
| 2776 | ifr32 = compat_ptr(ifc32.ifcbuf); |
| 2777 | for (i = 0, j = 0; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2778 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
| 2779 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { |
| 2780 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2781 | return -EFAULT; |
| 2782 | ifr32++; |
| 2783 | ifr++; |
| 2784 | } |
| 2785 | |
| 2786 | if (ifc32.ifcbuf == 0) { |
| 2787 | /* Translate from 64-bit structure multiple to |
| 2788 | * a 32-bit one. |
| 2789 | */ |
| 2790 | i = ifc.ifc_len; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2791 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2792 | ifc32.ifc_len = i; |
| 2793 | } else { |
| 2794 | ifc32.ifc_len = i; |
| 2795 | } |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2796 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2797 | return -EFAULT; |
| 2798 | |
| 2799 | return 0; |
| 2800 | } |
| 2801 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2802 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2803 | { |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2804 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
| 2805 | bool convert_in = false, convert_out = false; |
| 2806 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); |
| 2807 | struct ethtool_rxnfc __user *rxnfc; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2808 | struct ifreq __user *ifr; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2809 | u32 rule_cnt = 0, actual_rule_cnt; |
| 2810 | u32 ethcmd; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2811 | u32 data; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2812 | int ret; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2813 | |
| 2814 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2815 | return -EFAULT; |
| 2816 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2817 | compat_rxnfc = compat_ptr(data); |
| 2818 | |
| 2819 | if (get_user(ethcmd, &compat_rxnfc->cmd)) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2820 | return -EFAULT; |
| 2821 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2822 | /* Most ethtool structures are defined without padding. |
| 2823 | * Unfortunately struct ethtool_rxnfc is an exception. |
| 2824 | */ |
| 2825 | switch (ethcmd) { |
| 2826 | default: |
| 2827 | break; |
| 2828 | case ETHTOOL_GRXCLSRLALL: |
| 2829 | /* Buffer size is variable */ |
| 2830 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) |
| 2831 | return -EFAULT; |
| 2832 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) |
| 2833 | return -ENOMEM; |
| 2834 | buf_size += rule_cnt * sizeof(u32); |
| 2835 | /* fall through */ |
| 2836 | case ETHTOOL_GRXRINGS: |
| 2837 | case ETHTOOL_GRXCLSRLCNT: |
| 2838 | case ETHTOOL_GRXCLSRULE: |
Ben Hutchings | 55664f3 | 2012-01-03 12:04:51 +0000 | [diff] [blame] | 2839 | case ETHTOOL_SRXCLSRLINS: |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2840 | convert_out = true; |
| 2841 | /* fall through */ |
| 2842 | case ETHTOOL_SRXCLSRLDEL: |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2843 | buf_size += sizeof(struct ethtool_rxnfc); |
| 2844 | convert_in = true; |
| 2845 | break; |
| 2846 | } |
| 2847 | |
| 2848 | ifr = compat_alloc_user_space(buf_size); |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2849 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2850 | |
| 2851 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2852 | return -EFAULT; |
| 2853 | |
| 2854 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
| 2855 | &ifr->ifr_ifru.ifru_data)) |
| 2856 | return -EFAULT; |
| 2857 | |
| 2858 | if (convert_in) { |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2859 | /* We expect there to be holes between fs.m_ext and |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2860 | * fs.ring_cookie and at the end of fs, but nowhere else. |
| 2861 | */ |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2862 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
| 2863 | sizeof(compat_rxnfc->fs.m_ext) != |
| 2864 | offsetof(struct ethtool_rxnfc, fs.m_ext) + |
| 2865 | sizeof(rxnfc->fs.m_ext)); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2866 | BUILD_BUG_ON( |
| 2867 | offsetof(struct compat_ethtool_rxnfc, fs.location) - |
| 2868 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != |
| 2869 | offsetof(struct ethtool_rxnfc, fs.location) - |
| 2870 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); |
| 2871 | |
| 2872 | if (copy_in_user(rxnfc, compat_rxnfc, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2873 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
| 2874 | (void __user *)rxnfc) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2875 | copy_in_user(&rxnfc->fs.ring_cookie, |
| 2876 | &compat_rxnfc->fs.ring_cookie, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2877 | (void __user *)(&rxnfc->fs.location + 1) - |
| 2878 | (void __user *)&rxnfc->fs.ring_cookie) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2879 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
| 2880 | sizeof(rxnfc->rule_cnt))) |
| 2881 | return -EFAULT; |
| 2882 | } |
| 2883 | |
| 2884 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); |
| 2885 | if (ret) |
| 2886 | return ret; |
| 2887 | |
| 2888 | if (convert_out) { |
| 2889 | if (copy_in_user(compat_rxnfc, rxnfc, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2890 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
| 2891 | (const void __user *)rxnfc) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2892 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
| 2893 | &rxnfc->fs.ring_cookie, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2894 | (const void __user *)(&rxnfc->fs.location + 1) - |
| 2895 | (const void __user *)&rxnfc->fs.ring_cookie) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2896 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
| 2897 | sizeof(rxnfc->rule_cnt))) |
| 2898 | return -EFAULT; |
| 2899 | |
| 2900 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { |
| 2901 | /* As an optimisation, we only copy the actual |
| 2902 | * number of rules that the underlying |
| 2903 | * function returned. Since Mallory might |
| 2904 | * change the rule count in user memory, we |
| 2905 | * check that it is less than the rule count |
| 2906 | * originally given (as the user buffer size), |
| 2907 | * which has been range-checked. |
| 2908 | */ |
| 2909 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) |
| 2910 | return -EFAULT; |
| 2911 | if (actual_rule_cnt < rule_cnt) |
| 2912 | rule_cnt = actual_rule_cnt; |
| 2913 | if (copy_in_user(&compat_rxnfc->rule_locs[0], |
| 2914 | &rxnfc->rule_locs[0], |
| 2915 | rule_cnt * sizeof(u32))) |
| 2916 | return -EFAULT; |
| 2917 | } |
| 2918 | } |
| 2919 | |
| 2920 | return 0; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2921 | } |
| 2922 | |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2923 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
| 2924 | { |
| 2925 | void __user *uptr; |
| 2926 | compat_uptr_t uptr32; |
| 2927 | struct ifreq __user *uifr; |
| 2928 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2929 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2930 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 2931 | return -EFAULT; |
| 2932 | |
| 2933 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
| 2934 | return -EFAULT; |
| 2935 | |
| 2936 | uptr = compat_ptr(uptr32); |
| 2937 | |
| 2938 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) |
| 2939 | return -EFAULT; |
| 2940 | |
| 2941 | return dev_ioctl(net, SIOCWANDEV, uifr); |
| 2942 | } |
| 2943 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2944 | static int bond_ioctl(struct net *net, unsigned int cmd, |
| 2945 | struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2946 | { |
| 2947 | struct ifreq kifr; |
| 2948 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2949 | mm_segment_t old_fs; |
| 2950 | int err; |
| 2951 | u32 data; |
| 2952 | void __user *datap; |
| 2953 | |
| 2954 | switch (cmd) { |
| 2955 | case SIOCBONDENSLAVE: |
| 2956 | case SIOCBONDRELEASE: |
| 2957 | case SIOCBONDSETHWADDR: |
| 2958 | case SIOCBONDCHANGEACTIVE: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2959 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2960 | return -EFAULT; |
| 2961 | |
| 2962 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2963 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 2964 | err = dev_ioctl(net, cmd, |
| 2965 | (struct ifreq __user __force *) &kifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2966 | set_fs(old_fs); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2967 | |
| 2968 | return err; |
| 2969 | case SIOCBONDSLAVEINFOQUERY: |
| 2970 | case SIOCBONDINFOQUERY: |
| 2971 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 2972 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2973 | return -EFAULT; |
| 2974 | |
| 2975 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2976 | return -EFAULT; |
| 2977 | |
| 2978 | datap = compat_ptr(data); |
| 2979 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) |
| 2980 | return -EFAULT; |
| 2981 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2982 | return dev_ioctl(net, cmd, uifr); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2983 | default: |
Linus Torvalds | 07d106d | 2012-01-05 15:40:12 -0800 | [diff] [blame] | 2984 | return -ENOIOCTLCMD; |
Joe Perches | ccbd6a5 | 2010-05-14 10:58:26 +0000 | [diff] [blame] | 2985 | } |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2986 | } |
| 2987 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2988 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
| 2989 | struct compat_ifreq __user *u_ifreq32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2990 | { |
| 2991 | struct ifreq __user *u_ifreq64; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2992 | char tmp_buf[IFNAMSIZ]; |
| 2993 | void __user *data64; |
| 2994 | u32 data32; |
| 2995 | |
| 2996 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), |
| 2997 | IFNAMSIZ)) |
| 2998 | return -EFAULT; |
| 2999 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
| 3000 | return -EFAULT; |
| 3001 | data64 = compat_ptr(data32); |
| 3002 | |
| 3003 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); |
| 3004 | |
| 3005 | /* Don't check these user accesses, just let that get trapped |
| 3006 | * in the ioctl handler instead. |
| 3007 | */ |
| 3008 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
| 3009 | IFNAMSIZ)) |
| 3010 | return -EFAULT; |
| 3011 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
| 3012 | return -EFAULT; |
| 3013 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3014 | return dev_ioctl(net, cmd, u_ifreq64); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3015 | } |
| 3016 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3017 | static int dev_ifsioc(struct net *net, struct socket *sock, |
| 3018 | unsigned int cmd, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3019 | { |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3020 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3021 | int err; |
| 3022 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3023 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 3024 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) |
| 3025 | return -EFAULT; |
| 3026 | |
| 3027 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); |
| 3028 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3029 | if (!err) { |
| 3030 | switch (cmd) { |
| 3031 | case SIOCGIFFLAGS: |
| 3032 | case SIOCGIFMETRIC: |
| 3033 | case SIOCGIFMTU: |
| 3034 | case SIOCGIFMEM: |
| 3035 | case SIOCGIFHWADDR: |
| 3036 | case SIOCGIFINDEX: |
| 3037 | case SIOCGIFADDR: |
| 3038 | case SIOCGIFBRDADDR: |
| 3039 | case SIOCGIFDSTADDR: |
| 3040 | case SIOCGIFNETMASK: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 3041 | case SIOCGIFPFLAGS: |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3042 | case SIOCGIFTXQLEN: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 3043 | case SIOCGMIIPHY: |
| 3044 | case SIOCGMIIREG: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3045 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3046 | err = -EFAULT; |
| 3047 | break; |
| 3048 | } |
| 3049 | } |
| 3050 | return err; |
| 3051 | } |
| 3052 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3053 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
| 3054 | struct compat_ifreq __user *uifr32) |
| 3055 | { |
| 3056 | struct ifreq ifr; |
| 3057 | struct compat_ifmap __user *uifmap32; |
| 3058 | mm_segment_t old_fs; |
| 3059 | int err; |
| 3060 | |
| 3061 | uifmap32 = &uifr32->ifr_ifru.ifru_map; |
| 3062 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); |
| 3063 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 3064 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 3065 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 3066 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 3067 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 3068 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); |
| 3069 | if (err) |
| 3070 | return -EFAULT; |
| 3071 | |
| 3072 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3073 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3074 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3075 | set_fs(old_fs); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3076 | |
| 3077 | if (cmd == SIOCGIFMAP && !err) { |
| 3078 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); |
| 3079 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 3080 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 3081 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 3082 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 3083 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 3084 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); |
| 3085 | if (err) |
| 3086 | err = -EFAULT; |
| 3087 | } |
| 3088 | return err; |
| 3089 | } |
| 3090 | |
| 3091 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) |
| 3092 | { |
| 3093 | void __user *uptr; |
| 3094 | compat_uptr_t uptr32; |
| 3095 | struct ifreq __user *uifr; |
| 3096 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3097 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3098 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 3099 | return -EFAULT; |
| 3100 | |
| 3101 | if (get_user(uptr32, &uifr32->ifr_data)) |
| 3102 | return -EFAULT; |
| 3103 | |
| 3104 | uptr = compat_ptr(uptr32); |
| 3105 | |
| 3106 | if (put_user(uptr, &uifr->ifr_data)) |
| 3107 | return -EFAULT; |
| 3108 | |
| 3109 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); |
| 3110 | } |
| 3111 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3112 | struct rtentry32 { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3113 | u32 rt_pad1; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3114 | struct sockaddr rt_dst; /* target address */ |
| 3115 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ |
| 3116 | struct sockaddr rt_genmask; /* target network mask (IP) */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3117 | unsigned short rt_flags; |
| 3118 | short rt_pad2; |
| 3119 | u32 rt_pad3; |
| 3120 | unsigned char rt_tos; |
| 3121 | unsigned char rt_class; |
| 3122 | short rt_pad4; |
| 3123 | short rt_metric; /* +1 for binary compatibility! */ |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3124 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3125 | u32 rt_mtu; /* per route MTU/Window */ |
| 3126 | u32 rt_window; /* Window clamping */ |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3127 | unsigned short rt_irtt; /* Initial RTT */ |
| 3128 | }; |
| 3129 | |
| 3130 | struct in6_rtmsg32 { |
| 3131 | struct in6_addr rtmsg_dst; |
| 3132 | struct in6_addr rtmsg_src; |
| 3133 | struct in6_addr rtmsg_gateway; |
| 3134 | u32 rtmsg_type; |
| 3135 | u16 rtmsg_dst_len; |
| 3136 | u16 rtmsg_src_len; |
| 3137 | u32 rtmsg_metric; |
| 3138 | u32 rtmsg_info; |
| 3139 | u32 rtmsg_flags; |
| 3140 | s32 rtmsg_ifindex; |
| 3141 | }; |
| 3142 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3143 | static int routing_ioctl(struct net *net, struct socket *sock, |
| 3144 | unsigned int cmd, void __user *argp) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3145 | { |
| 3146 | int ret; |
| 3147 | void *r = NULL; |
| 3148 | struct in6_rtmsg r6; |
| 3149 | struct rtentry r4; |
| 3150 | char devname[16]; |
| 3151 | u32 rtdev; |
| 3152 | mm_segment_t old_fs = get_fs(); |
| 3153 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3154 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
| 3155 | struct in6_rtmsg32 __user *ur6 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3156 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3157 | 3 * sizeof(struct in6_addr)); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3158 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
| 3159 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); |
| 3160 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); |
| 3161 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); |
| 3162 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); |
| 3163 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); |
| 3164 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3165 | |
| 3166 | r = (void *) &r6; |
| 3167 | } else { /* ipv4 */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3168 | struct rtentry32 __user *ur4 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3169 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3170 | 3 * sizeof(struct sockaddr)); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3171 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
| 3172 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); |
| 3173 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); |
| 3174 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); |
| 3175 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); |
| 3176 | ret |= __get_user(rtdev, &(ur4->rt_dev)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3177 | if (rtdev) { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3178 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3179 | r4.rt_dev = (char __user __force *)devname; |
| 3180 | devname[15] = 0; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3181 | } else |
| 3182 | r4.rt_dev = NULL; |
| 3183 | |
| 3184 | r = (void *) &r4; |
| 3185 | } |
| 3186 | |
| 3187 | if (ret) { |
| 3188 | ret = -EFAULT; |
| 3189 | goto out; |
| 3190 | } |
| 3191 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3192 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3193 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3194 | set_fs(old_fs); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3195 | |
| 3196 | out: |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3197 | return ret; |
| 3198 | } |
| 3199 | |
| 3200 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE |
| 3201 | * for some operations; this forces use of the newer bridge-utils that |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3202 | * use compatible ioctls |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3203 | */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3204 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3205 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3206 | compat_ulong_t tmp; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3207 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3208 | if (get_user(tmp, argp)) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3209 | return -EFAULT; |
| 3210 | if (tmp == BRCTL_GET_VERSION) |
| 3211 | return BRCTL_VERSION + 1; |
| 3212 | return -EINVAL; |
| 3213 | } |
| 3214 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3215 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
| 3216 | unsigned int cmd, unsigned long arg) |
| 3217 | { |
| 3218 | void __user *argp = compat_ptr(arg); |
| 3219 | struct sock *sk = sock->sk; |
| 3220 | struct net *net = sock_net(sk); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3221 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3222 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
| 3223 | return siocdevprivate_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3224 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3225 | switch (cmd) { |
| 3226 | case SIOCSIFBR: |
| 3227 | case SIOCGIFBR: |
| 3228 | return old_bridge_ioctl(argp); |
| 3229 | case SIOCGIFNAME: |
| 3230 | return dev_ifname32(net, argp); |
| 3231 | case SIOCGIFCONF: |
| 3232 | return dev_ifconf(net, argp); |
| 3233 | case SIOCETHTOOL: |
| 3234 | return ethtool_ioctl(net, argp); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3235 | case SIOCWANDEV: |
| 3236 | return compat_siocwandev(net, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3237 | case SIOCGIFMAP: |
| 3238 | case SIOCSIFMAP: |
| 3239 | return compat_sioc_ifmap(net, cmd, argp); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3240 | case SIOCBONDENSLAVE: |
| 3241 | case SIOCBONDRELEASE: |
| 3242 | case SIOCBONDSETHWADDR: |
| 3243 | case SIOCBONDSLAVEINFOQUERY: |
| 3244 | case SIOCBONDINFOQUERY: |
| 3245 | case SIOCBONDCHANGEACTIVE: |
| 3246 | return bond_ioctl(net, cmd, argp); |
| 3247 | case SIOCADDRT: |
| 3248 | case SIOCDELRT: |
| 3249 | return routing_ioctl(net, sock, cmd, argp); |
| 3250 | case SIOCGSTAMP: |
| 3251 | return do_siocgstamp(net, sock, cmd, argp); |
| 3252 | case SIOCGSTAMPNS: |
| 3253 | return do_siocgstampns(net, sock, cmd, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3254 | case SIOCSHWTSTAMP: |
| 3255 | return compat_siocshwtstamp(net, argp); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3256 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3257 | case FIOSETOWN: |
| 3258 | case SIOCSPGRP: |
| 3259 | case FIOGETOWN: |
| 3260 | case SIOCGPGRP: |
| 3261 | case SIOCBRADDBR: |
| 3262 | case SIOCBRDELBR: |
| 3263 | case SIOCGIFVLAN: |
| 3264 | case SIOCSIFVLAN: |
| 3265 | case SIOCADDDLCI: |
| 3266 | case SIOCDELDLCI: |
| 3267 | return sock_ioctl(file, cmd, arg); |
| 3268 | |
| 3269 | case SIOCGIFFLAGS: |
| 3270 | case SIOCSIFFLAGS: |
| 3271 | case SIOCGIFMETRIC: |
| 3272 | case SIOCSIFMETRIC: |
| 3273 | case SIOCGIFMTU: |
| 3274 | case SIOCSIFMTU: |
| 3275 | case SIOCGIFMEM: |
| 3276 | case SIOCSIFMEM: |
| 3277 | case SIOCGIFHWADDR: |
| 3278 | case SIOCSIFHWADDR: |
| 3279 | case SIOCADDMULTI: |
| 3280 | case SIOCDELMULTI: |
| 3281 | case SIOCGIFINDEX: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3282 | case SIOCGIFADDR: |
| 3283 | case SIOCSIFADDR: |
| 3284 | case SIOCSIFHWBROADCAST: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3285 | case SIOCDIFADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3286 | case SIOCGIFBRDADDR: |
| 3287 | case SIOCSIFBRDADDR: |
| 3288 | case SIOCGIFDSTADDR: |
| 3289 | case SIOCSIFDSTADDR: |
| 3290 | case SIOCGIFNETMASK: |
| 3291 | case SIOCSIFNETMASK: |
| 3292 | case SIOCSIFPFLAGS: |
| 3293 | case SIOCGIFPFLAGS: |
| 3294 | case SIOCGIFTXQLEN: |
| 3295 | case SIOCSIFTXQLEN: |
| 3296 | case SIOCBRADDIF: |
| 3297 | case SIOCBRDELIF: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3298 | case SIOCSIFNAME: |
| 3299 | case SIOCGMIIPHY: |
| 3300 | case SIOCGMIIREG: |
| 3301 | case SIOCSMIIREG: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3302 | return dev_ifsioc(net, sock, cmd, argp); |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3303 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3304 | case SIOCSARP: |
| 3305 | case SIOCGARP: |
| 3306 | case SIOCDARP: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3307 | case SIOCATMARK: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3308 | return sock_do_ioctl(net, sock, cmd, arg); |
| 3309 | } |
| 3310 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3311 | return -ENOIOCTLCMD; |
| 3312 | } |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3313 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 3314 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3315 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3316 | { |
| 3317 | struct socket *sock = file->private_data; |
| 3318 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3319 | struct sock *sk; |
| 3320 | struct net *net; |
| 3321 | |
| 3322 | sk = sock->sk; |
| 3323 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3324 | |
| 3325 | if (sock->ops->compat_ioctl) |
| 3326 | ret = sock->ops->compat_ioctl(sock, cmd, arg); |
| 3327 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3328 | if (ret == -ENOIOCTLCMD && |
| 3329 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 3330 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 3331 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3332 | if (ret == -ENOIOCTLCMD) |
| 3333 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
| 3334 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3335 | return ret; |
| 3336 | } |
| 3337 | #endif |
| 3338 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3339 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 3340 | { |
| 3341 | return sock->ops->bind(sock, addr, addrlen); |
| 3342 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3343 | EXPORT_SYMBOL(kernel_bind); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3344 | |
| 3345 | int kernel_listen(struct socket *sock, int backlog) |
| 3346 | { |
| 3347 | return sock->ops->listen(sock, backlog); |
| 3348 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3349 | EXPORT_SYMBOL(kernel_listen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3350 | |
| 3351 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 3352 | { |
| 3353 | struct sock *sk = sock->sk; |
| 3354 | int err; |
| 3355 | |
| 3356 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 3357 | newsock); |
| 3358 | if (err < 0) |
| 3359 | goto done; |
| 3360 | |
| 3361 | err = sock->ops->accept(sock, *newsock, flags); |
| 3362 | if (err < 0) { |
| 3363 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 3364 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3365 | goto done; |
| 3366 | } |
| 3367 | |
| 3368 | (*newsock)->ops = sock->ops; |
Wei Yongjun | 1b08534 | 2008-12-18 19:35:10 -0800 | [diff] [blame] | 3369 | __module_get((*newsock)->ops->owner); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3370 | |
| 3371 | done: |
| 3372 | return err; |
| 3373 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3374 | EXPORT_SYMBOL(kernel_accept); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3375 | |
| 3376 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 3377 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3378 | { |
| 3379 | return sock->ops->connect(sock, addr, addrlen, flags); |
| 3380 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3381 | EXPORT_SYMBOL(kernel_connect); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3382 | |
| 3383 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
| 3384 | int *addrlen) |
| 3385 | { |
| 3386 | return sock->ops->getname(sock, addr, addrlen, 0); |
| 3387 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3388 | EXPORT_SYMBOL(kernel_getsockname); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3389 | |
| 3390 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
| 3391 | int *addrlen) |
| 3392 | { |
| 3393 | return sock->ops->getname(sock, addr, addrlen, 1); |
| 3394 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3395 | EXPORT_SYMBOL(kernel_getpeername); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3396 | |
| 3397 | int kernel_getsockopt(struct socket *sock, int level, int optname, |
| 3398 | char *optval, int *optlen) |
| 3399 | { |
| 3400 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3401 | char __user *uoptval; |
| 3402 | int __user *uoptlen; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3403 | int err; |
| 3404 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3405 | uoptval = (char __user __force *) optval; |
| 3406 | uoptlen = (int __user __force *) optlen; |
| 3407 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3408 | set_fs(KERNEL_DS); |
| 3409 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3410 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3411 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3412 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
| 3413 | uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3414 | set_fs(oldfs); |
| 3415 | return err; |
| 3416 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3417 | EXPORT_SYMBOL(kernel_getsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3418 | |
| 3419 | int kernel_setsockopt(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3420 | char *optval, unsigned int optlen) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3421 | { |
| 3422 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3423 | char __user *uoptval; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3424 | int err; |
| 3425 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3426 | uoptval = (char __user __force *) optval; |
| 3427 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3428 | set_fs(KERNEL_DS); |
| 3429 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3430 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3431 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3432 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3433 | optlen); |
| 3434 | set_fs(oldfs); |
| 3435 | return err; |
| 3436 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3437 | EXPORT_SYMBOL(kernel_setsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3438 | |
| 3439 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
| 3440 | size_t size, int flags) |
| 3441 | { |
| 3442 | if (sock->ops->sendpage) |
| 3443 | return sock->ops->sendpage(sock, page, offset, size, flags); |
| 3444 | |
| 3445 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 3446 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3447 | EXPORT_SYMBOL(kernel_sendpage); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3448 | |
| 3449 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
| 3450 | { |
| 3451 | mm_segment_t oldfs = get_fs(); |
| 3452 | int err; |
| 3453 | |
| 3454 | set_fs(KERNEL_DS); |
| 3455 | err = sock->ops->ioctl(sock, cmd, arg); |
| 3456 | set_fs(oldfs); |
| 3457 | |
| 3458 | return err; |
| 3459 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3460 | EXPORT_SYMBOL(kernel_sock_ioctl); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3461 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3462 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 3463 | { |
| 3464 | return sock->ops->shutdown(sock, how); |
| 3465 | } |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3466 | EXPORT_SYMBOL(kernel_sock_shutdown); |