blob: b7111425004656a3e35be074a2372af43da29e6c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 Juhl02c30a82005-05-05 16:16:16 -07007 * Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * 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 Hemminger89bddce2006-09-01 00:19:31 -070045 * Tigran Aivazian : Made listen(2) backlog sanity checks
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * 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 Hemminger89bddce2006-09-01 00:19:31 -070056 * paradigm.
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 *
58 * Based upon Swansea University Computer Society NET3.039
59 */
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include <linux/socket.h>
63#include <linux/file.h>
64#include <linux/net.h>
65#include <linux/interrupt.h>
Stephen Hemminger55737fd2006-09-01 00:23:39 -070066#include <linux/rcupdate.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070067#include <linux/netdevice.h>
68#include <linux/proc_fs.h>
69#include <linux/seq_file.h>
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080070#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#include <linux/wanrouter.h>
72#include <linux/if_bridge.h>
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030073#include <linux/if_frad.h>
74#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070075#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 Torvalds1da177e2005-04-16 15:20:36 -070080#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 Woodhouse3ec3b2f2005-05-17 12:08:48 +010085#include <linux/audit.h>
Adrian Bunkd86b5e02006-01-21 00:46:55 +010086#include <linux/wireless.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
88#include <asm/uaccess.h>
89#include <asm/unistd.h>
90
91#include <net/compat.h>
92
93#include <net/sock.h>
94#include <linux/netfilter.h>
95
96static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
Badari Pulavarty027445c2006-09-30 23:28:46 -070097static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
98 unsigned long nr_segs, loff_t pos);
99static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
100 unsigned long nr_segs, loff_t pos);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700101static int sock_mmap(struct file *file, struct vm_area_struct *vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103static int sock_close(struct inode *inode, struct file *file);
104static unsigned int sock_poll(struct file *file,
105 struct poll_table_struct *wait);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700106static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800107#ifdef CONFIG_COMPAT
108static long compat_sock_ioctl(struct file *file,
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700109 unsigned int cmd, unsigned long arg);
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800110#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111static int sock_fasync(int fd, struct file *filp, int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112static ssize_t sock_sendpage(struct file *file, struct page *page,
113 int offset, size_t size, loff_t *ppos, int more);
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115/*
116 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
117 * in the operation structures but are done directly via the socketcall() multiplexor.
118 */
119
Arjan van de Venda7071d2007-02-12 00:55:36 -0800120static const struct file_operations socket_file_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 .owner = THIS_MODULE,
122 .llseek = no_llseek,
123 .aio_read = sock_aio_read,
124 .aio_write = sock_aio_write,
125 .poll = sock_poll,
126 .unlocked_ioctl = sock_ioctl,
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800127#ifdef CONFIG_COMPAT
128 .compat_ioctl = compat_sock_ioctl,
129#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 .mmap = sock_mmap,
131 .open = sock_no_open, /* special open code to disallow open via /proc */
132 .release = sock_close,
133 .fasync = sock_fasync,
Jens Axboe5274f052006-03-30 15:15:30 +0200134 .sendpage = sock_sendpage,
135 .splice_write = generic_splice_sendpage,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136};
137
138/*
139 * The protocol list. Each protocol is registered in here.
140 */
141
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142static DEFINE_SPINLOCK(net_family_lock);
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -0700143static const struct net_proto_family *net_families[NPROTO] __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145/*
146 * Statistics counters of the socket lists
147 */
148
149static DEFINE_PER_CPU(int, sockets_in_use) = 0;
150
151/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700152 * Support routines.
153 * Move socket addresses back and forth across the kernel/user
154 * divide and look after the messy bits.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 */
156
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700157#define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 16 for IP, 16 for IPX,
159 24 for IPv6,
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700160 about 80 for AX.25
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 must be at least one bigger than
162 the AF_UNIX size (see net/unix/af_unix.c
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700163 :unix_mkname()).
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166/**
167 * move_addr_to_kernel - copy a socket address into kernel space
168 * @uaddr: Address in user space
169 * @kaddr: Address in kernel space
170 * @ulen: Length in user space
171 *
172 * The address is copied into kernel space. If the provided address is
173 * too long an error code of -EINVAL is returned. If the copy gives
174 * invalid addresses -EFAULT is returned. On a success 0 is returned.
175 */
176
177int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr)
178{
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700179 if (ulen < 0 || ulen > MAX_SOCK_ADDR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700181 if (ulen == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 return 0;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700183 if (copy_from_user(kaddr, uaddr, ulen))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 return -EFAULT;
David Woodhouse3ec3b2f2005-05-17 12:08:48 +0100185 return audit_sockaddr(ulen, kaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186}
187
188/**
189 * move_addr_to_user - copy an address to user space
190 * @kaddr: kernel space address
191 * @klen: length of address in kernel
192 * @uaddr: user space address
193 * @ulen: pointer to user length field
194 *
195 * The value pointed to by ulen on entry is the buffer length available.
196 * This is overwritten with the buffer space used. -EINVAL is returned
197 * if an overlong buffer is specified or a negative buffer size. -EFAULT
198 * is returned if either the buffer or the length field are not
199 * accessible.
200 * After copying the data up to the limit the user specifies, the true
201 * length of the data is written over the length limit the user
202 * specified. Zero is returned for a success.
203 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700204
205int move_addr_to_user(void *kaddr, int klen, void __user *uaddr,
206 int __user *ulen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207{
208 int err;
209 int len;
210
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700211 err = get_user(len, ulen);
212 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 return err;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700214 if (len > klen)
215 len = klen;
216 if (len < 0 || len > MAX_SOCK_ADDR)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700218 if (len) {
Steve Grubbd6fe3942006-03-30 12:20:22 -0500219 if (audit_sockaddr(klen, kaddr))
220 return -ENOMEM;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700221 if (copy_to_user(uaddr, kaddr, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 return -EFAULT;
223 }
224 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700225 * "fromlen shall refer to the value before truncation.."
226 * 1003.1g
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 */
228 return __put_user(klen, ulen);
229}
230
231#define SOCKFS_MAGIC 0x534F434B
232
Christoph Lametere18b8902006-12-06 20:33:20 -0800233static struct kmem_cache *sock_inode_cachep __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
235static struct inode *sock_alloc_inode(struct super_block *sb)
236{
237 struct socket_alloc *ei;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700238
Christoph Lametere94b1762006-12-06 20:33:17 -0800239 ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 if (!ei)
241 return NULL;
242 init_waitqueue_head(&ei->socket.wait);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700243
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 ei->socket.fasync_list = NULL;
245 ei->socket.state = SS_UNCONNECTED;
246 ei->socket.flags = 0;
247 ei->socket.ops = NULL;
248 ei->socket.sk = NULL;
249 ei->socket.file = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
251 return &ei->vfs_inode;
252}
253
254static void sock_destroy_inode(struct inode *inode)
255{
256 kmem_cache_free(sock_inode_cachep,
257 container_of(inode, struct socket_alloc, vfs_inode));
258}
259
Christoph Lametere18b8902006-12-06 20:33:20 -0800260static void init_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261{
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700262 struct socket_alloc *ei = (struct socket_alloc *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
Christoph Lametera35afb82007-05-16 22:10:57 -0700264 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265}
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267static int init_inodecache(void)
268{
269 sock_inode_cachep = kmem_cache_create("sock_inode_cache",
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700270 sizeof(struct socket_alloc),
271 0,
272 (SLAB_HWCACHE_ALIGN |
273 SLAB_RECLAIM_ACCOUNT |
274 SLAB_MEM_SPREAD),
275 init_once,
276 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 if (sock_inode_cachep == NULL)
278 return -ENOMEM;
279 return 0;
280}
281
282static struct super_operations sockfs_ops = {
283 .alloc_inode = sock_alloc_inode,
284 .destroy_inode =sock_destroy_inode,
285 .statfs = simple_statfs,
286};
287
David Howells454e2392006-06-23 02:02:57 -0700288static int sockfs_get_sb(struct file_system_type *fs_type,
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700289 int flags, const char *dev_name, void *data,
290 struct vfsmount *mnt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291{
David Howells454e2392006-06-23 02:02:57 -0700292 return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC,
293 mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294}
295
Eric Dumazetba899662005-08-26 12:05:31 -0700296static struct vfsmount *sock_mnt __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
298static struct file_system_type sock_fs_type = {
299 .name = "sockfs",
300 .get_sb = sockfs_get_sb,
301 .kill_sb = kill_anon_super,
302};
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700303
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304static int sockfs_delete_dentry(struct dentry *dentry)
305{
Eric Dumazet304e61e2006-12-06 20:38:49 -0800306 /*
307 * At creation time, we pretended this dentry was hashed
308 * (by clearing DCACHE_UNHASHED bit in d_flags)
309 * At delete time, we restore the truth : not hashed.
310 * (so that dput() can proceed correctly)
311 */
312 dentry->d_flags |= DCACHE_UNHASHED;
313 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314}
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700315
316/*
317 * sockfs_dname() is called from d_path().
318 */
319static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen)
320{
321 return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]",
322 dentry->d_inode->i_ino);
323}
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325static struct dentry_operations sockfs_dentry_operations = {
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700326 .d_delete = sockfs_delete_dentry,
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700327 .d_dname = sockfs_dname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328};
329
330/*
331 * Obtains the first available file descriptor and sets it up for use.
332 *
David S. Miller39d8c1b2006-03-20 17:13:49 -0800333 * These functions create file structures and maps them to fd space
334 * of the current process. On success it returns file descriptor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 * and file struct implicitly stored in sock->file.
336 * Note that another thread may close file descriptor before we return
337 * from this function. We use the fact that now we do not refer
338 * to socket after mapping. If one day we will need it, this
339 * function will increment ref. count on file by 1.
340 *
341 * In any case returned fd MAY BE not valid!
342 * This race condition is unavoidable
343 * with shared fd spaces, we cannot solve it inside kernel,
344 * but we take care of internal coherence yet.
345 */
346
David S. Miller39d8c1b2006-03-20 17:13:49 -0800347static int sock_alloc_fd(struct file **filep)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348{
349 int fd;
David S. Miller39d8c1b2006-03-20 17:13:49 -0800350
351 fd = get_unused_fd();
352 if (likely(fd >= 0)) {
353 struct file *file = get_empty_filp();
354
355 *filep = file;
356 if (unlikely(!file)) {
357 put_unused_fd(fd);
358 return -ENFILE;
359 }
360 } else
361 *filep = NULL;
362 return fd;
363}
364
365static int sock_attach_fd(struct socket *sock, struct file *file)
366{
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700367 struct qstr name = { .name = "" };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700369 file->f_path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name);
Josef Sipek3126a422006-12-08 02:37:23 -0800370 if (unlikely(!file->f_path.dentry))
David S. Miller39d8c1b2006-03-20 17:13:49 -0800371 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372
Josef Sipek3126a422006-12-08 02:37:23 -0800373 file->f_path.dentry->d_op = &sockfs_dentry_operations;
Eric Dumazet304e61e2006-12-06 20:38:49 -0800374 /*
375 * We dont want to push this dentry into global dentry hash table.
376 * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED
377 * This permits a working /proc/$pid/fd/XXX on sockets
378 */
Josef Sipek3126a422006-12-08 02:37:23 -0800379 file->f_path.dentry->d_flags &= ~DCACHE_UNHASHED;
380 d_instantiate(file->f_path.dentry, SOCK_INODE(sock));
381 file->f_path.mnt = mntget(sock_mnt);
382 file->f_mapping = file->f_path.dentry->d_inode->i_mapping;
David S. Miller39d8c1b2006-03-20 17:13:49 -0800383
384 sock->file = file;
385 file->f_op = SOCK_INODE(sock)->i_fop = &socket_file_ops;
386 file->f_mode = FMODE_READ | FMODE_WRITE;
387 file->f_flags = O_RDWR;
388 file->f_pos = 0;
389 file->private_data = sock;
390
391 return 0;
392}
393
394int sock_map_fd(struct socket *sock)
395{
396 struct file *newfile;
397 int fd = sock_alloc_fd(&newfile);
398
399 if (likely(fd >= 0)) {
400 int err = sock_attach_fd(sock, newfile);
401
402 if (unlikely(err < 0)) {
403 put_filp(newfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 put_unused_fd(fd);
David S. Miller39d8c1b2006-03-20 17:13:49 -0800405 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 }
David S. Miller39d8c1b2006-03-20 17:13:49 -0800407 fd_install(fd, newfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409 return fd;
410}
411
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800412static struct socket *sock_from_file(struct file *file, int *err)
413{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800414 if (file->f_op == &socket_file_ops)
415 return file->private_data; /* set in sock_map_fd */
416
Eric Dumazet23bb80d2007-02-08 14:59:57 -0800417 *err = -ENOTSOCK;
418 return NULL;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800419}
420
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421/**
422 * sockfd_lookup - Go from a file number to its socket slot
423 * @fd: file handle
424 * @err: pointer to an error code return
425 *
426 * The file handle passed in is locked and the socket it is bound
427 * too is returned. If an error occurs the err pointer is overwritten
428 * with a negative errno code and NULL is returned. The function checks
429 * for both invalid handles and passing a handle which is not a socket.
430 *
431 * On a success the socket object pointer is returned.
432 */
433
434struct socket *sockfd_lookup(int fd, int *err)
435{
436 struct file *file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 struct socket *sock;
438
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700439 file = fget(fd);
440 if (!file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 *err = -EBADF;
442 return NULL;
443 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700444
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800445 sock = sock_from_file(file, err);
446 if (!sock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 fput(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 return sock;
449}
450
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800451static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
452{
453 struct file *file;
454 struct socket *sock;
455
Hua Zhong36725582006-04-19 15:25:02 -0700456 *err = -EBADF;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800457 file = fget_light(fd, fput_needed);
458 if (file) {
459 sock = sock_from_file(file, err);
460 if (sock)
461 return sock;
462 fput_light(file, *fput_needed);
463 }
464 return NULL;
465}
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467/**
468 * sock_alloc - allocate a socket
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700469 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 * Allocate a new inode and socket object. The two are bound together
471 * and initialised. The socket is then returned. If we are out of inodes
472 * NULL is returned.
473 */
474
475static struct socket *sock_alloc(void)
476{
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700477 struct inode *inode;
478 struct socket *sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
480 inode = new_inode(sock_mnt->mnt_sb);
481 if (!inode)
482 return NULL;
483
484 sock = SOCKET_I(inode);
485
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700486 inode->i_mode = S_IFSOCK | S_IRWXUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 inode->i_uid = current->fsuid;
488 inode->i_gid = current->fsgid;
489
490 get_cpu_var(sockets_in_use)++;
491 put_cpu_var(sockets_in_use);
492 return sock;
493}
494
495/*
496 * In theory you can't get an open on this inode, but /proc provides
497 * a back door. Remember to keep it shut otherwise you'll let the
498 * creepy crawlies in.
499 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
502{
503 return -ENXIO;
504}
505
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800506const struct file_operations bad_sock_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 .owner = THIS_MODULE,
508 .open = sock_no_open,
509};
510
511/**
512 * sock_release - close a socket
513 * @sock: socket to close
514 *
515 * The socket is released from the protocol stack if it has a release
516 * callback, and the inode is then released if the socket is bound to
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700517 * an inode not a file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700519
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520void sock_release(struct socket *sock)
521{
522 if (sock->ops) {
523 struct module *owner = sock->ops->owner;
524
525 sock->ops->release(sock);
526 sock->ops = NULL;
527 module_put(owner);
528 }
529
530 if (sock->fasync_list)
531 printk(KERN_ERR "sock_release: fasync list not empty!\n");
532
533 get_cpu_var(sockets_in_use)--;
534 put_cpu_var(sockets_in_use);
535 if (!sock->file) {
536 iput(SOCK_INODE(sock));
537 return;
538 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700539 sock->file = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540}
541
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700542static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 struct msghdr *msg, size_t size)
544{
545 struct sock_iocb *si = kiocb_to_siocb(iocb);
546 int err;
547
548 si->sock = sock;
549 si->scm = NULL;
550 si->msg = msg;
551 si->size = size;
552
553 err = security_socket_sendmsg(sock, msg, size);
554 if (err)
555 return err;
556
557 return sock->ops->sendmsg(iocb, sock, msg, size);
558}
559
560int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
561{
562 struct kiocb iocb;
563 struct sock_iocb siocb;
564 int ret;
565
566 init_sync_kiocb(&iocb, NULL);
567 iocb.private = &siocb;
568 ret = __sock_sendmsg(&iocb, sock, msg, size);
569 if (-EIOCBQUEUED == ret)
570 ret = wait_on_sync_kiocb(&iocb);
571 return ret;
572}
573
574int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
575 struct kvec *vec, size_t num, size_t size)
576{
577 mm_segment_t oldfs = get_fs();
578 int result;
579
580 set_fs(KERNEL_DS);
581 /*
582 * the following is safe, since for compiler definitions of kvec and
583 * iovec are identical, yielding the same in-core layout and alignment
584 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700585 msg->msg_iov = (struct iovec *)vec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 msg->msg_iovlen = num;
587 result = sock_sendmsg(sock, msg, size);
588 set_fs(oldfs);
589 return result;
590}
591
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700592/*
593 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
594 */
595void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
596 struct sk_buff *skb)
597{
598 ktime_t kt = skb->tstamp;
599
600 if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
601 struct timeval tv;
602 /* Race occurred between timestamp enabling and packet
603 receiving. Fill in the current time for now. */
604 if (kt.tv64 == 0)
605 kt = ktime_get_real();
606 skb->tstamp = kt;
607 tv = ktime_to_timeval(kt);
608 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, sizeof(tv), &tv);
609 } else {
610 struct timespec ts;
611 /* Race occurred between timestamp enabling and packet
612 receiving. Fill in the current time for now. */
613 if (kt.tv64 == 0)
614 kt = ktime_get_real();
615 skb->tstamp = kt;
616 ts = ktime_to_timespec(kt);
617 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, sizeof(ts), &ts);
618 }
619}
620
Arnaldo Carvalho de Melo7c81fd82007-03-10 00:39:35 -0300621EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
622
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700623static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 struct msghdr *msg, size_t size, int flags)
625{
626 int err;
627 struct sock_iocb *si = kiocb_to_siocb(iocb);
628
629 si->sock = sock;
630 si->scm = NULL;
631 si->msg = msg;
632 si->size = size;
633 si->flags = flags;
634
635 err = security_socket_recvmsg(sock, msg, size, flags);
636 if (err)
637 return err;
638
639 return sock->ops->recvmsg(iocb, sock, msg, size, flags);
640}
641
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700642int sock_recvmsg(struct socket *sock, struct msghdr *msg,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 size_t size, int flags)
644{
645 struct kiocb iocb;
646 struct sock_iocb siocb;
647 int ret;
648
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700649 init_sync_kiocb(&iocb, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 iocb.private = &siocb;
651 ret = __sock_recvmsg(&iocb, sock, msg, size, flags);
652 if (-EIOCBQUEUED == ret)
653 ret = wait_on_sync_kiocb(&iocb);
654 return ret;
655}
656
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700657int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
658 struct kvec *vec, size_t num, size_t size, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659{
660 mm_segment_t oldfs = get_fs();
661 int result;
662
663 set_fs(KERNEL_DS);
664 /*
665 * the following is safe, since for compiler definitions of kvec and
666 * iovec are identical, yielding the same in-core layout and alignment
667 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700668 msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 result = sock_recvmsg(sock, msg, size, flags);
670 set_fs(oldfs);
671 return result;
672}
673
674static void sock_aio_dtor(struct kiocb *iocb)
675{
676 kfree(iocb->private);
677}
678
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300679static ssize_t sock_sendpage(struct file *file, struct page *page,
680 int offset, size_t size, loff_t *ppos, int more)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700681{
682 struct socket *sock;
683 int flags;
684
Eric Dumazetb69aee02005-09-06 14:42:45 -0700685 sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
687 flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
688 if (more)
689 flags |= MSG_MORE;
690
691 return sock->ops->sendpage(sock, page, offset, size, flags);
692}
693
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800694static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700695 struct sock_iocb *siocb)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800696{
697 if (!is_sync_kiocb(iocb)) {
698 siocb = kmalloc(sizeof(*siocb), GFP_KERNEL);
699 if (!siocb)
700 return NULL;
701 iocb->ki_dtor = sock_aio_dtor;
702 }
703
704 siocb->kiocb = iocb;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800705 iocb->private = siocb;
706 return siocb;
707}
708
709static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb,
Badari Pulavarty027445c2006-09-30 23:28:46 -0700710 struct file *file, const struct iovec *iov,
711 unsigned long nr_segs)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800712{
713 struct socket *sock = file->private_data;
714 size_t size = 0;
715 int i;
716
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700717 for (i = 0; i < nr_segs; i++)
718 size += iov[i].iov_len;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800719
720 msg->msg_name = NULL;
721 msg->msg_namelen = 0;
722 msg->msg_control = NULL;
723 msg->msg_controllen = 0;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700724 msg->msg_iov = (struct iovec *)iov;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800725 msg->msg_iovlen = nr_segs;
726 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
727
728 return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags);
729}
730
Badari Pulavarty027445c2006-09-30 23:28:46 -0700731static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
732 unsigned long nr_segs, loff_t pos)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800733{
734 struct sock_iocb siocb, *x;
735
736 if (pos != 0)
737 return -ESPIPE;
Badari Pulavarty027445c2006-09-30 23:28:46 -0700738
739 if (iocb->ki_left == 0) /* Match SYS5 behaviour */
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800740 return 0;
741
Badari Pulavarty027445c2006-09-30 23:28:46 -0700742
743 x = alloc_sock_iocb(iocb, &siocb);
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800744 if (!x)
745 return -ENOMEM;
Badari Pulavarty027445c2006-09-30 23:28:46 -0700746 return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800747}
748
749static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb,
Badari Pulavarty027445c2006-09-30 23:28:46 -0700750 struct file *file, const struct iovec *iov,
751 unsigned long nr_segs)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800752{
753 struct socket *sock = file->private_data;
754 size_t size = 0;
755 int i;
756
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700757 for (i = 0; i < nr_segs; i++)
758 size += iov[i].iov_len;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800759
760 msg->msg_name = NULL;
761 msg->msg_namelen = 0;
762 msg->msg_control = NULL;
763 msg->msg_controllen = 0;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700764 msg->msg_iov = (struct iovec *)iov;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800765 msg->msg_iovlen = nr_segs;
766 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
767 if (sock->type == SOCK_SEQPACKET)
768 msg->msg_flags |= MSG_EOR;
769
770 return __sock_sendmsg(iocb, sock, msg, size);
771}
772
Badari Pulavarty027445c2006-09-30 23:28:46 -0700773static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
774 unsigned long nr_segs, loff_t pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775{
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800776 struct sock_iocb siocb, *x;
777
778 if (pos != 0)
779 return -ESPIPE;
Badari Pulavarty027445c2006-09-30 23:28:46 -0700780
781 if (iocb->ki_left == 0) /* Match SYS5 behaviour */
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800782 return 0;
783
Badari Pulavarty027445c2006-09-30 23:28:46 -0700784 x = alloc_sock_iocb(iocb, &siocb);
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800785 if (!x)
786 return -ENOMEM;
787
Badari Pulavarty027445c2006-09-30 23:28:46 -0700788 return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789}
790
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791/*
792 * Atomic setting of ioctl hooks to avoid race
793 * with module unload.
794 */
795
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800796static DEFINE_MUTEX(br_ioctl_mutex);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700797static int (*br_ioctl_hook) (unsigned int cmd, void __user *arg) = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700799void brioctl_set(int (*hook) (unsigned int, void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800801 mutex_lock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 br_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800803 mutex_unlock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804}
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806EXPORT_SYMBOL(brioctl_set);
807
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800808static DEFINE_MUTEX(vlan_ioctl_mutex);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700809static int (*vlan_ioctl_hook) (void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700811void vlan_ioctl_set(int (*hook) (void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800813 mutex_lock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814 vlan_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800815 mutex_unlock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816}
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700817
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818EXPORT_SYMBOL(vlan_ioctl_set);
819
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800820static DEFINE_MUTEX(dlci_ioctl_mutex);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700821static int (*dlci_ioctl_hook) (unsigned int, void __user *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700823void dlci_ioctl_set(int (*hook) (unsigned int, void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800825 mutex_lock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826 dlci_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800827 mutex_unlock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828}
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830EXPORT_SYMBOL(dlci_ioctl_set);
831
832/*
833 * With an ioctl, arg may well be a user mode pointer, but we don't know
834 * what to do with it - that's up to the protocol still.
835 */
836
837static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
838{
839 struct socket *sock;
840 void __user *argp = (void __user *)arg;
841 int pid, err;
842
Eric Dumazetb69aee02005-09-06 14:42:45 -0700843 sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
845 err = dev_ioctl(cmd, argp);
846 } else
Adrian Bunkd86b5e02006-01-21 00:46:55 +0100847#ifdef CONFIG_WIRELESS_EXT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
849 err = dev_ioctl(cmd, argp);
850 } else
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700851#endif /* CONFIG_WIRELESS_EXT */
852 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853 case FIOSETOWN:
854 case SIOCSPGRP:
855 err = -EFAULT;
856 if (get_user(pid, (int __user *)argp))
857 break;
858 err = f_setown(sock->file, pid, 1);
859 break;
860 case FIOGETOWN:
861 case SIOCGPGRP:
Eric W. Biederman609d7fa2006-10-02 02:17:15 -0700862 err = put_user(f_getown(sock->file),
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700863 (int __user *)argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864 break;
865 case SIOCGIFBR:
866 case SIOCSIFBR:
867 case SIOCBRADDBR:
868 case SIOCBRDELBR:
869 err = -ENOPKG;
870 if (!br_ioctl_hook)
871 request_module("bridge");
872
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800873 mutex_lock(&br_ioctl_mutex);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700874 if (br_ioctl_hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 err = br_ioctl_hook(cmd, argp);
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800876 mutex_unlock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 break;
878 case SIOCGIFVLAN:
879 case SIOCSIFVLAN:
880 err = -ENOPKG;
881 if (!vlan_ioctl_hook)
882 request_module("8021q");
883
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800884 mutex_lock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 if (vlan_ioctl_hook)
886 err = vlan_ioctl_hook(argp);
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800887 mutex_unlock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 case SIOCADDDLCI:
890 case SIOCDELDLCI:
891 err = -ENOPKG;
892 if (!dlci_ioctl_hook)
893 request_module("dlci");
894
895 if (dlci_ioctl_hook) {
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800896 mutex_lock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 err = dlci_ioctl_hook(cmd, argp);
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800898 mutex_unlock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899 }
900 break;
901 default:
902 err = sock->ops->ioctl(sock, cmd, arg);
Christoph Hellwigb5e5fa52006-01-03 14:18:33 -0800903
904 /*
905 * If this ioctl is unknown try to hand it down
906 * to the NIC driver.
907 */
908 if (err == -ENOIOCTLCMD)
909 err = dev_ioctl(cmd, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 break;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700911 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 return err;
913}
914
915int sock_create_lite(int family, int type, int protocol, struct socket **res)
916{
917 int err;
918 struct socket *sock = NULL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700919
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 err = security_socket_create(family, type, protocol, 1);
921 if (err)
922 goto out;
923
924 sock = sock_alloc();
925 if (!sock) {
926 err = -ENOMEM;
927 goto out;
928 }
929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 sock->type = type;
Venkat Yekkirala7420ed22006-08-04 23:17:57 -0700931 err = security_socket_post_create(sock, family, type, protocol, 1);
932 if (err)
933 goto out_release;
934
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935out:
936 *res = sock;
937 return err;
Venkat Yekkirala7420ed22006-08-04 23:17:57 -0700938out_release:
939 sock_release(sock);
940 sock = NULL;
941 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942}
943
944/* No kernel lock held - perfect */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700945static unsigned int sock_poll(struct file *file, poll_table *wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946{
947 struct socket *sock;
948
949 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700950 * We can't return errors to poll, so it's either yes or no.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 */
Eric Dumazetb69aee02005-09-06 14:42:45 -0700952 sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 return sock->ops->poll(file, sock, wait);
954}
955
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700956static int sock_mmap(struct file *file, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957{
Eric Dumazetb69aee02005-09-06 14:42:45 -0700958 struct socket *sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
960 return sock->ops->mmap(file, sock, vma);
961}
962
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300963static int sock_close(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964{
965 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700966 * It was possible the inode is NULL we were
967 * closing an unfinished socket.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 */
969
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700970 if (!inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 printk(KERN_DEBUG "sock_close: NULL inode\n");
972 return 0;
973 }
974 sock_fasync(-1, filp, 0);
975 sock_release(SOCKET_I(inode));
976 return 0;
977}
978
979/*
980 * Update the socket async list
981 *
982 * Fasync_list locking strategy.
983 *
984 * 1. fasync_list is modified only under process context socket lock
985 * i.e. under semaphore.
986 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
987 * or under socket lock.
988 * 3. fasync_list can be used from softirq context, so that
989 * modification under socket lock have to be enhanced with
990 * write_lock_bh(&sk->sk_callback_lock).
991 * --ANK (990710)
992 */
993
994static int sock_fasync(int fd, struct file *filp, int on)
995{
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700996 struct fasync_struct *fa, *fna = NULL, **prev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 struct socket *sock;
998 struct sock *sk;
999
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001000 if (on) {
Kris Katterjohn8b3a7002006-01-11 15:56:43 -08001001 fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001002 if (fna == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 return -ENOMEM;
1004 }
1005
Eric Dumazetb69aee02005-09-06 14:42:45 -07001006 sock = filp->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001008 sk = sock->sk;
1009 if (sk == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010 kfree(fna);
1011 return -EINVAL;
1012 }
1013
1014 lock_sock(sk);
1015
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001016 prev = &(sock->fasync_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001018 for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev)
1019 if (fa->fa_file == filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 break;
1021
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001022 if (on) {
1023 if (fa != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 write_lock_bh(&sk->sk_callback_lock);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001025 fa->fa_fd = fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 write_unlock_bh(&sk->sk_callback_lock);
1027
1028 kfree(fna);
1029 goto out;
1030 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001031 fna->fa_file = filp;
1032 fna->fa_fd = fd;
1033 fna->magic = FASYNC_MAGIC;
1034 fna->fa_next = sock->fasync_list;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 write_lock_bh(&sk->sk_callback_lock);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001036 sock->fasync_list = fna;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037 write_unlock_bh(&sk->sk_callback_lock);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001038 } else {
1039 if (fa != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 write_lock_bh(&sk->sk_callback_lock);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001041 *prev = fa->fa_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 write_unlock_bh(&sk->sk_callback_lock);
1043 kfree(fa);
1044 }
1045 }
1046
1047out:
1048 release_sock(sock->sk);
1049 return 0;
1050}
1051
1052/* This function may be called only under socket lock or callback_lock */
1053
1054int sock_wake_async(struct socket *sock, int how, int band)
1055{
1056 if (!sock || !sock->fasync_list)
1057 return -1;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001058 switch (how) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 case 1:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001060
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
1062 break;
1063 goto call_kill;
1064 case 2:
1065 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
1066 break;
1067 /* fall through */
1068 case 0:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001069call_kill:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 __kill_fasync(sock->fasync_list, SIGIO, band);
1071 break;
1072 case 3:
1073 __kill_fasync(sock->fasync_list, SIGURG, band);
1074 }
1075 return 0;
1076}
1077
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001078static int __sock_create(int family, int type, int protocol,
1079 struct socket **res, int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080{
1081 int err;
1082 struct socket *sock;
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001083 const struct net_proto_family *pf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
1085 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001086 * Check protocol is in range
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 */
1088 if (family < 0 || family >= NPROTO)
1089 return -EAFNOSUPPORT;
1090 if (type < 0 || type >= SOCK_MAX)
1091 return -EINVAL;
1092
1093 /* Compatibility.
1094
1095 This uglymoron is moved from INET layer to here to avoid
1096 deadlock in module load.
1097 */
1098 if (family == PF_INET && type == SOCK_PACKET) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001099 static int warned;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 if (!warned) {
1101 warned = 1;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001102 printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1103 current->comm);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 }
1105 family = PF_PACKET;
1106 }
1107
1108 err = security_socket_create(family, type, protocol, kern);
1109 if (err)
1110 return err;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001111
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001112 /*
1113 * Allocate the socket and allow the family to set things up. if
1114 * the protocol is 0, the family is instructed to select an appropriate
1115 * default.
1116 */
1117 sock = sock_alloc();
1118 if (!sock) {
1119 if (net_ratelimit())
1120 printk(KERN_WARNING "socket: no more sockets\n");
1121 return -ENFILE; /* Not exactly a match, but its the
1122 closest posix thing */
1123 }
1124
1125 sock->type = type;
1126
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127#if defined(CONFIG_KMOD)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001128 /* Attempt to load a protocol module if the find failed.
1129 *
1130 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 * requested real, full-featured networking support upon configuration.
1132 * Otherwise module support will break!
1133 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001134 if (net_families[family] == NULL)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001135 request_module("net-pf-%d", family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136#endif
1137
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001138 rcu_read_lock();
1139 pf = rcu_dereference(net_families[family]);
1140 err = -EAFNOSUPPORT;
1141 if (!pf)
1142 goto out_release;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143
1144 /*
1145 * We will call the ->create function, that possibly is in a loadable
1146 * module, so we have to bump that loadable module refcnt first.
1147 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001148 if (!try_module_get(pf->owner))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149 goto out_release;
1150
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001151 /* Now protected by module ref count */
1152 rcu_read_unlock();
1153
1154 err = pf->create(sock, protocol);
1155 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 goto out_module_put;
Frank Filza79af592005-09-27 15:23:38 -07001157
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 /*
1159 * Now to bump the refcnt of the [loadable] module that owns this
1160 * socket at sock_release time we decrement its refcnt.
1161 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001162 if (!try_module_get(sock->ops->owner))
1163 goto out_module_busy;
1164
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165 /*
1166 * Now that we're done with the ->create function, the [loadable]
1167 * module can have its refcnt decremented
1168 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001169 module_put(pf->owner);
Venkat Yekkirala7420ed22006-08-04 23:17:57 -07001170 err = security_socket_post_create(sock, family, type, protocol, kern);
1171 if (err)
1172 goto out_release;
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001173 *res = sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001174
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001175 return 0;
1176
1177out_module_busy:
1178 err = -EAFNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001179out_module_put:
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001180 sock->ops = NULL;
1181 module_put(pf->owner);
1182out_sock_release:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001183 sock_release(sock);
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001184 return err;
1185
1186out_release:
1187 rcu_read_unlock();
1188 goto out_sock_release;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189}
1190
1191int sock_create(int family, int type, int protocol, struct socket **res)
1192{
1193 return __sock_create(family, type, protocol, res, 0);
1194}
1195
1196int sock_create_kern(int family, int type, int protocol, struct socket **res)
1197{
1198 return __sock_create(family, type, protocol, res, 1);
1199}
1200
1201asmlinkage long sys_socket(int family, int type, int protocol)
1202{
1203 int retval;
1204 struct socket *sock;
1205
1206 retval = sock_create(family, type, protocol, &sock);
1207 if (retval < 0)
1208 goto out;
1209
1210 retval = sock_map_fd(sock);
1211 if (retval < 0)
1212 goto out_release;
1213
1214out:
1215 /* It may be already another descriptor 8) Not kernel problem. */
1216 return retval;
1217
1218out_release:
1219 sock_release(sock);
1220 return retval;
1221}
1222
1223/*
1224 * Create a pair of connected sockets.
1225 */
1226
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001227asmlinkage long sys_socketpair(int family, int type, int protocol,
1228 int __user *usockvec)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001229{
1230 struct socket *sock1, *sock2;
1231 int fd1, fd2, err;
Al Virodb349502007-02-07 01:48:00 -05001232 struct file *newfile1, *newfile2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233
1234 /*
1235 * Obtain the first socket and check if the underlying protocol
1236 * supports the socketpair call.
1237 */
1238
1239 err = sock_create(family, type, protocol, &sock1);
1240 if (err < 0)
1241 goto out;
1242
1243 err = sock_create(family, type, protocol, &sock2);
1244 if (err < 0)
1245 goto out_release_1;
1246
1247 err = sock1->ops->socketpair(sock1, sock2);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001248 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 goto out_release_both;
1250
Al Virodb349502007-02-07 01:48:00 -05001251 fd1 = sock_alloc_fd(&newfile1);
1252 if (unlikely(fd1 < 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 goto out_release_both;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254
Al Virodb349502007-02-07 01:48:00 -05001255 fd2 = sock_alloc_fd(&newfile2);
1256 if (unlikely(fd2 < 0)) {
1257 put_filp(newfile1);
1258 put_unused_fd(fd1);
1259 goto out_release_both;
1260 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261
Al Virodb349502007-02-07 01:48:00 -05001262 err = sock_attach_fd(sock1, newfile1);
1263 if (unlikely(err < 0)) {
1264 goto out_fd2;
1265 }
1266
1267 err = sock_attach_fd(sock2, newfile2);
1268 if (unlikely(err < 0)) {
1269 fput(newfile1);
1270 goto out_fd1;
1271 }
1272
1273 err = audit_fd_pair(fd1, fd2);
1274 if (err < 0) {
1275 fput(newfile1);
1276 fput(newfile2);
1277 goto out_fd;
1278 }
1279
1280 fd_install(fd1, newfile1);
1281 fd_install(fd2, newfile2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001282 /* fd1 and fd2 may be already another descriptors.
1283 * Not kernel problem.
1284 */
1285
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001286 err = put_user(fd1, &usockvec[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287 if (!err)
1288 err = put_user(fd2, &usockvec[1]);
1289 if (!err)
1290 return 0;
1291
1292 sys_close(fd2);
1293 sys_close(fd1);
1294 return err;
1295
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296out_release_both:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001297 sock_release(sock2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001298out_release_1:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001299 sock_release(sock1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300out:
1301 return err;
Al Virodb349502007-02-07 01:48:00 -05001302
1303out_fd2:
1304 put_filp(newfile1);
1305 sock_release(sock1);
1306out_fd1:
1307 put_filp(newfile2);
1308 sock_release(sock2);
1309out_fd:
1310 put_unused_fd(fd1);
1311 put_unused_fd(fd2);
1312 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313}
1314
Linus Torvalds1da177e2005-04-16 15:20:36 -07001315/*
1316 * Bind a name to a socket. Nothing much to do here since it's
1317 * the protocol's responsibility to handle the local address.
1318 *
1319 * We move the socket address to kernel space before we call
1320 * the protocol layer (having also checked the address is ok).
1321 */
1322
1323asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen)
1324{
1325 struct socket *sock;
1326 char address[MAX_SOCK_ADDR];
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001327 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001329 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Stephen Hemmingere71a4782007-04-10 20:10:33 -07001330 if (sock) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001331 err = move_addr_to_kernel(umyaddr, addrlen, address);
1332 if (err >= 0) {
1333 err = security_socket_bind(sock,
1334 (struct sockaddr *)address,
1335 addrlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001336 if (!err)
1337 err = sock->ops->bind(sock,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001338 (struct sockaddr *)
1339 address, addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 }
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001341 fput_light(sock->file, fput_needed);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001342 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001343 return err;
1344}
1345
Linus Torvalds1da177e2005-04-16 15:20:36 -07001346/*
1347 * Perform a listen. Basically, we allow the protocol to do anything
1348 * necessary for a listen, and if that works, we mark the socket as
1349 * ready for listening.
1350 */
1351
Brian Haley7a42c212006-08-31 15:03:02 -07001352int sysctl_somaxconn __read_mostly = SOMAXCONN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353
1354asmlinkage long sys_listen(int fd, int backlog)
1355{
1356 struct socket *sock;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001357 int err, fput_needed;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001358
1359 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1360 if (sock) {
1361 if ((unsigned)backlog > sysctl_somaxconn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001362 backlog = sysctl_somaxconn;
1363
1364 err = security_socket_listen(sock, backlog);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001365 if (!err)
1366 err = sock->ops->listen(sock, backlog);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001368 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 }
1370 return err;
1371}
1372
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373/*
1374 * For accept, we attempt to create a new socket, set up the link
1375 * with the client, wake up the client, then return the new
1376 * connected fd. We collect the address of the connector in kernel
1377 * space and move it to user at the very end. This is unclean because
1378 * we open the socket then return an error.
1379 *
1380 * 1003.1g adds the ability to recvmsg() to query connection pending
1381 * status to recvmsg. We need to add that support in a way thats
1382 * clean when we restucture accept also.
1383 */
1384
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001385asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr,
1386 int __user *upeer_addrlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387{
1388 struct socket *sock, *newsock;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001389 struct file *newfile;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001390 int err, len, newfd, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 char address[MAX_SOCK_ADDR];
1392
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001393 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 if (!sock)
1395 goto out;
1396
1397 err = -ENFILE;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001398 if (!(newsock = sock_alloc()))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 goto out_put;
1400
1401 newsock->type = sock->type;
1402 newsock->ops = sock->ops;
1403
Linus Torvalds1da177e2005-04-16 15:20:36 -07001404 /*
1405 * We don't need try_module_get here, as the listening socket (sock)
1406 * has the protocol module (sock->ops->owner) held.
1407 */
1408 __module_get(newsock->ops->owner);
1409
David S. Miller39d8c1b2006-03-20 17:13:49 -08001410 newfd = sock_alloc_fd(&newfile);
1411 if (unlikely(newfd < 0)) {
1412 err = newfd;
David S. Miller9a1875e2006-04-01 12:48:36 -08001413 sock_release(newsock);
1414 goto out_put;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001415 }
1416
1417 err = sock_attach_fd(newsock, newfile);
1418 if (err < 0)
Alexey Dobriyan79f4f642007-03-26 14:09:52 -07001419 goto out_fd_simple;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001420
Frank Filza79af592005-09-27 15:23:38 -07001421 err = security_socket_accept(sock, newsock);
1422 if (err)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001423 goto out_fd;
Frank Filza79af592005-09-27 15:23:38 -07001424
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 err = sock->ops->accept(sock, newsock, sock->file->f_flags);
1426 if (err < 0)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001427 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001428
1429 if (upeer_sockaddr) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001430 if (newsock->ops->getname(newsock, (struct sockaddr *)address,
1431 &len, 2) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432 err = -ECONNABORTED;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001433 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001435 err = move_addr_to_user(address, len, upeer_sockaddr,
1436 upeer_addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001437 if (err < 0)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001438 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 }
1440
1441 /* File flags are not inherited via accept() unlike another OSes. */
1442
David S. Miller39d8c1b2006-03-20 17:13:49 -08001443 fd_install(newfd, newfile);
1444 err = newfd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001445
1446 security_socket_post_accept(sock, newsock);
1447
1448out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001449 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450out:
1451 return err;
Alexey Dobriyan79f4f642007-03-26 14:09:52 -07001452out_fd_simple:
1453 sock_release(newsock);
1454 put_filp(newfile);
1455 put_unused_fd(newfd);
1456 goto out_put;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001457out_fd:
David S. Miller9606a212006-04-01 01:00:14 -08001458 fput(newfile);
David S. Miller39d8c1b2006-03-20 17:13:49 -08001459 put_unused_fd(newfd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 goto out_put;
1461}
1462
Linus Torvalds1da177e2005-04-16 15:20:36 -07001463/*
1464 * Attempt to connect to a socket with the server address. The address
1465 * is in user space so we verify it is OK and move it to kernel space.
1466 *
1467 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1468 * break bindings
1469 *
1470 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1471 * other SEQPACKET protocols that take time to connect() as it doesn't
1472 * include the -EINPROGRESS status for such sockets.
1473 */
1474
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001475asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr,
1476 int addrlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001477{
1478 struct socket *sock;
1479 char address[MAX_SOCK_ADDR];
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001480 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001482 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001483 if (!sock)
1484 goto out;
1485 err = move_addr_to_kernel(uservaddr, addrlen, address);
1486 if (err < 0)
1487 goto out_put;
1488
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001489 err =
1490 security_socket_connect(sock, (struct sockaddr *)address, addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001491 if (err)
1492 goto out_put;
1493
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001494 err = sock->ops->connect(sock, (struct sockaddr *)address, addrlen,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 sock->file->f_flags);
1496out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001497 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498out:
1499 return err;
1500}
1501
1502/*
1503 * Get the local address ('name') of a socket object. Move the obtained
1504 * name to user space.
1505 */
1506
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001507asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr,
1508 int __user *usockaddr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509{
1510 struct socket *sock;
1511 char address[MAX_SOCK_ADDR];
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001512 int len, err, fput_needed;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001513
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001514 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 if (!sock)
1516 goto out;
1517
1518 err = security_socket_getsockname(sock);
1519 if (err)
1520 goto out_put;
1521
1522 err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 0);
1523 if (err)
1524 goto out_put;
1525 err = move_addr_to_user(address, len, usockaddr, usockaddr_len);
1526
1527out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001528 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529out:
1530 return err;
1531}
1532
1533/*
1534 * Get the remote address ('name') of a socket object. Move the obtained
1535 * name to user space.
1536 */
1537
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001538asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr,
1539 int __user *usockaddr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540{
1541 struct socket *sock;
1542 char address[MAX_SOCK_ADDR];
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001543 int len, err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001545 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1546 if (sock != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547 err = security_socket_getpeername(sock);
1548 if (err) {
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001549 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 return err;
1551 }
1552
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001553 err =
1554 sock->ops->getname(sock, (struct sockaddr *)address, &len,
1555 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001556 if (!err)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001557 err = move_addr_to_user(address, len, usockaddr,
1558 usockaddr_len);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001559 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001560 }
1561 return err;
1562}
1563
1564/*
1565 * Send a datagram to a given address. We move the address into kernel
1566 * space and check the user space data area is readable before invoking
1567 * the protocol.
1568 */
1569
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001570asmlinkage long sys_sendto(int fd, void __user *buff, size_t len,
1571 unsigned flags, struct sockaddr __user *addr,
1572 int addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573{
1574 struct socket *sock;
1575 char address[MAX_SOCK_ADDR];
1576 int err;
1577 struct msghdr msg;
1578 struct iovec iov;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001579 int fput_needed;
1580 struct file *sock_file;
1581
1582 sock_file = fget_light(fd, &fput_needed);
David S. Miller4387ff72007-02-08 15:06:08 -08001583 err = -EBADF;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001584 if (!sock_file)
David S. Miller4387ff72007-02-08 15:06:08 -08001585 goto out;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001586
1587 sock = sock_from_file(sock_file, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 if (!sock)
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001589 goto out_put;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001590 iov.iov_base = buff;
1591 iov.iov_len = len;
1592 msg.msg_name = NULL;
1593 msg.msg_iov = &iov;
1594 msg.msg_iovlen = 1;
1595 msg.msg_control = NULL;
1596 msg.msg_controllen = 0;
1597 msg.msg_namelen = 0;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001598 if (addr) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599 err = move_addr_to_kernel(addr, addr_len, address);
1600 if (err < 0)
1601 goto out_put;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001602 msg.msg_name = address;
1603 msg.msg_namelen = addr_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 }
1605 if (sock->file->f_flags & O_NONBLOCK)
1606 flags |= MSG_DONTWAIT;
1607 msg.msg_flags = flags;
1608 err = sock_sendmsg(sock, &msg, len);
1609
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001610out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001611 fput_light(sock_file, fput_needed);
David S. Miller4387ff72007-02-08 15:06:08 -08001612out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613 return err;
1614}
1615
1616/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001617 * Send a datagram down a socket.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618 */
1619
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001620asmlinkage long sys_send(int fd, void __user *buff, size_t len, unsigned flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621{
1622 return sys_sendto(fd, buff, len, flags, NULL, 0);
1623}
1624
1625/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001626 * Receive a frame from the socket and optionally record the address of the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 * sender. We verify the buffers are writable and if needed move the
1628 * sender address from kernel to user space.
1629 */
1630
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001631asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size,
1632 unsigned flags, struct sockaddr __user *addr,
1633 int __user *addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634{
1635 struct socket *sock;
1636 struct iovec iov;
1637 struct msghdr msg;
1638 char address[MAX_SOCK_ADDR];
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001639 int err, err2;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001640 struct file *sock_file;
1641 int fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001642
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001643 sock_file = fget_light(fd, &fput_needed);
David S. Miller4387ff72007-02-08 15:06:08 -08001644 err = -EBADF;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001645 if (!sock_file)
David S. Miller4387ff72007-02-08 15:06:08 -08001646 goto out;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001647
1648 sock = sock_from_file(sock_file, &err);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 if (!sock)
David S. Miller4387ff72007-02-08 15:06:08 -08001650 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001651
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001652 msg.msg_control = NULL;
1653 msg.msg_controllen = 0;
1654 msg.msg_iovlen = 1;
1655 msg.msg_iov = &iov;
1656 iov.iov_len = size;
1657 iov.iov_base = ubuf;
1658 msg.msg_name = address;
1659 msg.msg_namelen = MAX_SOCK_ADDR;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001660 if (sock->file->f_flags & O_NONBLOCK)
1661 flags |= MSG_DONTWAIT;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001662 err = sock_recvmsg(sock, &msg, size, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001663
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001664 if (err >= 0 && addr != NULL) {
1665 err2 = move_addr_to_user(address, msg.msg_namelen, addr, addr_len);
1666 if (err2 < 0)
1667 err = err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 }
David S. Miller4387ff72007-02-08 15:06:08 -08001669out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001670 fput_light(sock_file, fput_needed);
David S. Miller4387ff72007-02-08 15:06:08 -08001671out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 return err;
1673}
1674
1675/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001676 * Receive a datagram from a socket.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 */
1678
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001679asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size,
1680 unsigned flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681{
1682 return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
1683}
1684
1685/*
1686 * Set a socket option. Because we don't know the option lengths we have
1687 * to pass the user mode parameter for the protocols to sort out.
1688 */
1689
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001690asmlinkage long sys_setsockopt(int fd, int level, int optname,
1691 char __user *optval, int optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001693 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001694 struct socket *sock;
1695
1696 if (optlen < 0)
1697 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001698
1699 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1700 if (sock != NULL) {
1701 err = security_socket_setsockopt(sock, level, optname);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001702 if (err)
1703 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
1705 if (level == SOL_SOCKET)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001706 err =
1707 sock_setsockopt(sock, level, optname, optval,
1708 optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 else
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001710 err =
1711 sock->ops->setsockopt(sock, level, optname, optval,
1712 optlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001713out_put:
1714 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001715 }
1716 return err;
1717}
1718
1719/*
1720 * Get a socket option. Because we don't know the option lengths we have
1721 * to pass a user mode parameter for the protocols to sort out.
1722 */
1723
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001724asmlinkage long sys_getsockopt(int fd, int level, int optname,
1725 char __user *optval, int __user *optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001727 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728 struct socket *sock;
1729
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001730 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1731 if (sock != NULL) {
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001732 err = security_socket_getsockopt(sock, level, optname);
1733 if (err)
1734 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735
1736 if (level == SOL_SOCKET)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001737 err =
1738 sock_getsockopt(sock, level, optname, optval,
1739 optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 else
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001741 err =
1742 sock->ops->getsockopt(sock, level, optname, optval,
1743 optlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001744out_put:
1745 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746 }
1747 return err;
1748}
1749
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750/*
1751 * Shutdown a socket.
1752 */
1753
1754asmlinkage long sys_shutdown(int fd, int how)
1755{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001756 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001757 struct socket *sock;
1758
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001759 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1760 if (sock != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 err = security_socket_shutdown(sock, how);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001762 if (!err)
1763 err = sock->ops->shutdown(sock, how);
1764 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765 }
1766 return err;
1767}
1768
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001769/* A couple of helpful macros for getting the address of the 32/64 bit
Linus Torvalds1da177e2005-04-16 15:20:36 -07001770 * fields which are the same type (int / unsigned) on our platforms.
1771 */
1772#define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1773#define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1774#define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1775
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776/*
1777 * BSD sendmsg interface
1778 */
1779
1780asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags)
1781{
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001782 struct compat_msghdr __user *msg_compat =
1783 (struct compat_msghdr __user *)msg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 struct socket *sock;
1785 char address[MAX_SOCK_ADDR];
1786 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
Alex Williamsonb9d717a2005-09-26 14:28:02 -07001787 unsigned char ctl[sizeof(struct cmsghdr) + 20]
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001788 __attribute__ ((aligned(sizeof(__kernel_size_t))));
1789 /* 20 is size of ipv6_pktinfo */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001790 unsigned char *ctl_buf = ctl;
1791 struct msghdr msg_sys;
1792 int err, ctl_len, iov_size, total_len;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001793 int fput_needed;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001794
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795 err = -EFAULT;
1796 if (MSG_CMSG_COMPAT & flags) {
1797 if (get_compat_msghdr(&msg_sys, msg_compat))
1798 return -EFAULT;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001799 }
1800 else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801 return -EFAULT;
1802
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001803 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001804 if (!sock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 goto out;
1806
1807 /* do not move before msg_sys is valid */
1808 err = -EMSGSIZE;
1809 if (msg_sys.msg_iovlen > UIO_MAXIOV)
1810 goto out_put;
1811
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001812 /* Check whether to allocate the iovec area */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001813 err = -ENOMEM;
1814 iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
1815 if (msg_sys.msg_iovlen > UIO_FASTIOV) {
1816 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
1817 if (!iov)
1818 goto out_put;
1819 }
1820
1821 /* This will also move the address data into kernel space */
1822 if (MSG_CMSG_COMPAT & flags) {
1823 err = verify_compat_iovec(&msg_sys, iov, address, VERIFY_READ);
1824 } else
1825 err = verify_iovec(&msg_sys, iov, address, VERIFY_READ);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001826 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001827 goto out_freeiov;
1828 total_len = err;
1829
1830 err = -ENOBUFS;
1831
1832 if (msg_sys.msg_controllen > INT_MAX)
1833 goto out_freeiov;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001834 ctl_len = msg_sys.msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835 if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001836 err =
1837 cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl,
1838 sizeof(ctl));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839 if (err)
1840 goto out_freeiov;
1841 ctl_buf = msg_sys.msg_control;
Al Viro8920e8f2005-09-07 18:28:51 -07001842 ctl_len = msg_sys.msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 } else if (ctl_len) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001844 if (ctl_len > sizeof(ctl)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001846 if (ctl_buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001847 goto out_freeiov;
1848 }
1849 err = -EFAULT;
1850 /*
1851 * Careful! Before this, msg_sys.msg_control contains a user pointer.
1852 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
1853 * checking falls down on this.
1854 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001855 if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control,
1856 ctl_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857 goto out_freectl;
1858 msg_sys.msg_control = ctl_buf;
1859 }
1860 msg_sys.msg_flags = flags;
1861
1862 if (sock->file->f_flags & O_NONBLOCK)
1863 msg_sys.msg_flags |= MSG_DONTWAIT;
1864 err = sock_sendmsg(sock, &msg_sys, total_len);
1865
1866out_freectl:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001867 if (ctl_buf != ctl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 sock_kfree_s(sock->sk, ctl_buf, ctl_len);
1869out_freeiov:
1870 if (iov != iovstack)
1871 sock_kfree_s(sock->sk, iov, iov_size);
1872out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001873 fput_light(sock->file, fput_needed);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001874out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 return err;
1876}
1877
1878/*
1879 * BSD recvmsg interface
1880 */
1881
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001882asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg,
1883 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884{
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001885 struct compat_msghdr __user *msg_compat =
1886 (struct compat_msghdr __user *)msg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 struct socket *sock;
1888 struct iovec iovstack[UIO_FASTIOV];
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001889 struct iovec *iov = iovstack;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001890 struct msghdr msg_sys;
1891 unsigned long cmsg_ptr;
1892 int err, iov_size, total_len, len;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001893 int fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894
1895 /* kernel mode address */
1896 char addr[MAX_SOCK_ADDR];
1897
1898 /* user mode address pointers */
1899 struct sockaddr __user *uaddr;
1900 int __user *uaddr_len;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001901
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902 if (MSG_CMSG_COMPAT & flags) {
1903 if (get_compat_msghdr(&msg_sys, msg_compat))
1904 return -EFAULT;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001905 }
1906 else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
1907 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001908
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001909 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 if (!sock)
1911 goto out;
1912
1913 err = -EMSGSIZE;
1914 if (msg_sys.msg_iovlen > UIO_MAXIOV)
1915 goto out_put;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001916
1917 /* Check whether to allocate the iovec area */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 err = -ENOMEM;
1919 iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
1920 if (msg_sys.msg_iovlen > UIO_FASTIOV) {
1921 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
1922 if (!iov)
1923 goto out_put;
1924 }
1925
1926 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001927 * Save the user-mode address (verify_iovec will change the
1928 * kernel msghdr to use the kernel address space)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001929 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001930
1931 uaddr = (void __user *)msg_sys.msg_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 uaddr_len = COMPAT_NAMELEN(msg);
1933 if (MSG_CMSG_COMPAT & flags) {
1934 err = verify_compat_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
1935 } else
1936 err = verify_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
1937 if (err < 0)
1938 goto out_freeiov;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001939 total_len = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940
1941 cmsg_ptr = (unsigned long)msg_sys.msg_control;
Ulrich Drepper4a195422007-07-15 23:40:34 -07001942 msg_sys.msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001943
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944 if (sock->file->f_flags & O_NONBLOCK)
1945 flags |= MSG_DONTWAIT;
1946 err = sock_recvmsg(sock, &msg_sys, total_len, flags);
1947 if (err < 0)
1948 goto out_freeiov;
1949 len = err;
1950
1951 if (uaddr != NULL) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001952 err = move_addr_to_user(addr, msg_sys.msg_namelen, uaddr,
1953 uaddr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001954 if (err < 0)
1955 goto out_freeiov;
1956 }
David S. Miller37f7f422005-09-16 16:51:01 -07001957 err = __put_user((msg_sys.msg_flags & ~MSG_CMSG_COMPAT),
1958 COMPAT_FLAGS(msg));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001959 if (err)
1960 goto out_freeiov;
1961 if (MSG_CMSG_COMPAT & flags)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001962 err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 &msg_compat->msg_controllen);
1964 else
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001965 err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966 &msg->msg_controllen);
1967 if (err)
1968 goto out_freeiov;
1969 err = len;
1970
1971out_freeiov:
1972 if (iov != iovstack)
1973 sock_kfree_s(sock->sk, iov, iov_size);
1974out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001975 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001976out:
1977 return err;
1978}
1979
1980#ifdef __ARCH_WANT_SYS_SOCKETCALL
1981
1982/* Argument list sizes for sys_socketcall */
1983#define AL(x) ((x) * sizeof(unsigned long))
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001984static const unsigned char nargs[18]={
1985 AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
1986 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
1987 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)
1988};
1989
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990#undef AL
1991
1992/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001993 * System call vectors.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 *
1995 * Argument checking cleaned up. Saved 20% in size.
1996 * This function doesn't need to set the kernel lock because
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001997 * it is set by the callees.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001998 */
1999
2000asmlinkage long sys_socketcall(int call, unsigned long __user *args)
2001{
2002 unsigned long a[6];
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002003 unsigned long a0, a1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002004 int err;
2005
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002006 if (call < 1 || call > SYS_RECVMSG)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002007 return -EINVAL;
2008
2009 /* copy_from_user should be SMP safe. */
2010 if (copy_from_user(a, args, nargs[call]))
2011 return -EFAULT;
David Woodhouse3ec3b2f2005-05-17 12:08:48 +01002012
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002013 err = audit_socketcall(nargs[call] / sizeof(unsigned long), a);
David Woodhouse3ec3b2f2005-05-17 12:08:48 +01002014 if (err)
2015 return err;
2016
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002017 a0 = a[0];
2018 a1 = a[1];
2019
2020 switch (call) {
2021 case SYS_SOCKET:
2022 err = sys_socket(a0, a1, a[2]);
2023 break;
2024 case SYS_BIND:
2025 err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
2026 break;
2027 case SYS_CONNECT:
2028 err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]);
2029 break;
2030 case SYS_LISTEN:
2031 err = sys_listen(a0, a1);
2032 break;
2033 case SYS_ACCEPT:
2034 err =
2035 sys_accept(a0, (struct sockaddr __user *)a1,
2036 (int __user *)a[2]);
2037 break;
2038 case SYS_GETSOCKNAME:
2039 err =
2040 sys_getsockname(a0, (struct sockaddr __user *)a1,
2041 (int __user *)a[2]);
2042 break;
2043 case SYS_GETPEERNAME:
2044 err =
2045 sys_getpeername(a0, (struct sockaddr __user *)a1,
2046 (int __user *)a[2]);
2047 break;
2048 case SYS_SOCKETPAIR:
2049 err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]);
2050 break;
2051 case SYS_SEND:
2052 err = sys_send(a0, (void __user *)a1, a[2], a[3]);
2053 break;
2054 case SYS_SENDTO:
2055 err = sys_sendto(a0, (void __user *)a1, a[2], a[3],
2056 (struct sockaddr __user *)a[4], a[5]);
2057 break;
2058 case SYS_RECV:
2059 err = sys_recv(a0, (void __user *)a1, a[2], a[3]);
2060 break;
2061 case SYS_RECVFROM:
2062 err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
2063 (struct sockaddr __user *)a[4],
2064 (int __user *)a[5]);
2065 break;
2066 case SYS_SHUTDOWN:
2067 err = sys_shutdown(a0, a1);
2068 break;
2069 case SYS_SETSOCKOPT:
2070 err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]);
2071 break;
2072 case SYS_GETSOCKOPT:
2073 err =
2074 sys_getsockopt(a0, a1, a[2], (char __user *)a[3],
2075 (int __user *)a[4]);
2076 break;
2077 case SYS_SENDMSG:
2078 err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]);
2079 break;
2080 case SYS_RECVMSG:
2081 err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]);
2082 break;
2083 default:
2084 err = -EINVAL;
2085 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002086 }
2087 return err;
2088}
2089
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002090#endif /* __ARCH_WANT_SYS_SOCKETCALL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002091
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002092/**
2093 * sock_register - add a socket protocol handler
2094 * @ops: description of protocol
2095 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002096 * This function is called by a protocol handler that wants to
2097 * advertise its address family, and have it linked into the
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002098 * socket interface. The value ops->family coresponds to the
2099 * socket system call protocol family.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002100 */
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002101int sock_register(const struct net_proto_family *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102{
2103 int err;
2104
2105 if (ops->family >= NPROTO) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002106 printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family,
2107 NPROTO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002108 return -ENOBUFS;
2109 }
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002110
2111 spin_lock(&net_family_lock);
2112 if (net_families[ops->family])
2113 err = -EEXIST;
2114 else {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002115 net_families[ops->family] = ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116 err = 0;
2117 }
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002118 spin_unlock(&net_family_lock);
2119
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002120 printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002121 return err;
2122}
2123
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002124/**
2125 * sock_unregister - remove a protocol handler
2126 * @family: protocol family to remove
2127 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002128 * This function is called by a protocol handler that wants to
2129 * remove its address family, and have it unlinked from the
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002130 * new socket creation.
2131 *
2132 * If protocol handler is a module, then it can use module reference
2133 * counts to protect against new references. If protocol handler is not
2134 * a module then it needs to provide its own protection in
2135 * the ops->create routine.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002136 */
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002137void sock_unregister(int family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002138{
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002139 BUG_ON(family < 0 || family >= NPROTO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002141 spin_lock(&net_family_lock);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002142 net_families[family] = NULL;
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002143 spin_unlock(&net_family_lock);
2144
2145 synchronize_rcu();
2146
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002147 printk(KERN_INFO "NET: Unregistered protocol family %d\n", family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002148}
2149
Andi Kleen77d76ea2005-12-22 12:43:42 -08002150static int __init sock_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002151{
2152 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002153 * Initialize sock SLAB cache.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002154 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002155
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 sk_init();
2157
Linus Torvalds1da177e2005-04-16 15:20:36 -07002158 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002159 * Initialize skbuff SLAB cache
Linus Torvalds1da177e2005-04-16 15:20:36 -07002160 */
2161 skb_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002162
2163 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002164 * Initialize the protocols module.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002165 */
2166
2167 init_inodecache();
2168 register_filesystem(&sock_fs_type);
2169 sock_mnt = kern_mount(&sock_fs_type);
Andi Kleen77d76ea2005-12-22 12:43:42 -08002170
2171 /* The real protocol initialization is performed in later initcalls.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172 */
2173
2174#ifdef CONFIG_NETFILTER
2175 netfilter_init();
2176#endif
David S. Millercbeb3212005-12-22 12:58:55 -08002177
2178 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002179}
2180
Andi Kleen77d76ea2005-12-22 12:43:42 -08002181core_initcall(sock_init); /* early initcall */
2182
Linus Torvalds1da177e2005-04-16 15:20:36 -07002183#ifdef CONFIG_PROC_FS
2184void socket_seq_show(struct seq_file *seq)
2185{
2186 int cpu;
2187 int counter = 0;
2188
KAMEZAWA Hiroyuki6f912042006-04-10 22:52:50 -07002189 for_each_possible_cpu(cpu)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002190 counter += per_cpu(sockets_in_use, cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002191
2192 /* It can be negative, by the way. 8) */
2193 if (counter < 0)
2194 counter = 0;
2195
2196 seq_printf(seq, "sockets: used %d\n", counter);
2197}
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002198#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199
Shaun Pereira89bbfc92006-03-21 23:58:08 -08002200#ifdef CONFIG_COMPAT
2201static long compat_sock_ioctl(struct file *file, unsigned cmd,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002202 unsigned long arg)
Shaun Pereira89bbfc92006-03-21 23:58:08 -08002203{
2204 struct socket *sock = file->private_data;
2205 int ret = -ENOIOCTLCMD;
2206
2207 if (sock->ops->compat_ioctl)
2208 ret = sock->ops->compat_ioctl(sock, cmd, arg);
2209
2210 return ret;
2211}
2212#endif
2213
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07002214int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
2215{
2216 return sock->ops->bind(sock, addr, addrlen);
2217}
2218
2219int kernel_listen(struct socket *sock, int backlog)
2220{
2221 return sock->ops->listen(sock, backlog);
2222}
2223
2224int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
2225{
2226 struct sock *sk = sock->sk;
2227 int err;
2228
2229 err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol,
2230 newsock);
2231 if (err < 0)
2232 goto done;
2233
2234 err = sock->ops->accept(sock, *newsock, flags);
2235 if (err < 0) {
2236 sock_release(*newsock);
2237 goto done;
2238 }
2239
2240 (*newsock)->ops = sock->ops;
2241
2242done:
2243 return err;
2244}
2245
2246int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +09002247 int flags)
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07002248{
2249 return sock->ops->connect(sock, addr, addrlen, flags);
2250}
2251
2252int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
2253 int *addrlen)
2254{
2255 return sock->ops->getname(sock, addr, addrlen, 0);
2256}
2257
2258int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
2259 int *addrlen)
2260{
2261 return sock->ops->getname(sock, addr, addrlen, 1);
2262}
2263
2264int kernel_getsockopt(struct socket *sock, int level, int optname,
2265 char *optval, int *optlen)
2266{
2267 mm_segment_t oldfs = get_fs();
2268 int err;
2269
2270 set_fs(KERNEL_DS);
2271 if (level == SOL_SOCKET)
2272 err = sock_getsockopt(sock, level, optname, optval, optlen);
2273 else
2274 err = sock->ops->getsockopt(sock, level, optname, optval,
2275 optlen);
2276 set_fs(oldfs);
2277 return err;
2278}
2279
2280int kernel_setsockopt(struct socket *sock, int level, int optname,
2281 char *optval, int optlen)
2282{
2283 mm_segment_t oldfs = get_fs();
2284 int err;
2285
2286 set_fs(KERNEL_DS);
2287 if (level == SOL_SOCKET)
2288 err = sock_setsockopt(sock, level, optname, optval, optlen);
2289 else
2290 err = sock->ops->setsockopt(sock, level, optname, optval,
2291 optlen);
2292 set_fs(oldfs);
2293 return err;
2294}
2295
2296int kernel_sendpage(struct socket *sock, struct page *page, int offset,
2297 size_t size, int flags)
2298{
2299 if (sock->ops->sendpage)
2300 return sock->ops->sendpage(sock, page, offset, size, flags);
2301
2302 return sock_no_sendpage(sock, page, offset, size, flags);
2303}
2304
2305int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
2306{
2307 mm_segment_t oldfs = get_fs();
2308 int err;
2309
2310 set_fs(KERNEL_DS);
2311 err = sock->ops->ioctl(sock, cmd, arg);
2312 set_fs(oldfs);
2313
2314 return err;
2315}
2316
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317/* ABI emulation layers need these two */
2318EXPORT_SYMBOL(move_addr_to_kernel);
2319EXPORT_SYMBOL(move_addr_to_user);
2320EXPORT_SYMBOL(sock_create);
2321EXPORT_SYMBOL(sock_create_kern);
2322EXPORT_SYMBOL(sock_create_lite);
2323EXPORT_SYMBOL(sock_map_fd);
2324EXPORT_SYMBOL(sock_recvmsg);
2325EXPORT_SYMBOL(sock_register);
2326EXPORT_SYMBOL(sock_release);
2327EXPORT_SYMBOL(sock_sendmsg);
2328EXPORT_SYMBOL(sock_unregister);
2329EXPORT_SYMBOL(sock_wake_async);
2330EXPORT_SYMBOL(sockfd_lookup);
2331EXPORT_SYMBOL(kernel_sendmsg);
2332EXPORT_SYMBOL(kernel_recvmsg);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07002333EXPORT_SYMBOL(kernel_bind);
2334EXPORT_SYMBOL(kernel_listen);
2335EXPORT_SYMBOL(kernel_accept);
2336EXPORT_SYMBOL(kernel_connect);
2337EXPORT_SYMBOL(kernel_getsockname);
2338EXPORT_SYMBOL(kernel_getpeername);
2339EXPORT_SYMBOL(kernel_getsockopt);
2340EXPORT_SYMBOL(kernel_setsockopt);
2341EXPORT_SYMBOL(kernel_sendpage);
2342EXPORT_SYMBOL(kernel_sock_ioctl);