]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
7 | * Ross Biro | |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> | |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
45 | * Tigran Aivazian : Made listen(2) backlog sanity checks | |
46 | * protocol-independent | |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
56 | * paradigm. | |
57 | * | |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
61 | #include <linux/mm.h> | |
62 | #include <linux/socket.h> | |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
66 | #include <linux/thread_info.h> | |
67 | #include <linux/rcupdate.h> | |
68 | #include <linux/netdevice.h> | |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
71 | #include <linux/mutex.h> | |
72 | #include <linux/wanrouter.h> | |
73 | #include <linux/if_bridge.h> | |
74 | #include <linux/if_frad.h> | |
75 | #include <linux/if_vlan.h> | |
76 | #include <linux/init.h> | |
77 | #include <linux/poll.h> | |
78 | #include <linux/cache.h> | |
79 | #include <linux/module.h> | |
80 | #include <linux/highmem.h> | |
81 | #include <linux/mount.h> | |
82 | #include <linux/security.h> | |
83 | #include <linux/syscalls.h> | |
84 | #include <linux/compat.h> | |
85 | #include <linux/kmod.h> | |
86 | #include <linux/audit.h> | |
87 | #include <linux/wireless.h> | |
88 | #include <linux/nsproxy.h> | |
89 | ||
90 | #include <asm/uaccess.h> | |
91 | #include <asm/unistd.h> | |
92 | ||
93 | #include <net/compat.h> | |
94 | #include <net/wext.h> | |
95 | ||
96 | #include <net/sock.h> | |
97 | #include <linux/netfilter.h> | |
98 | ||
99 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); | |
100 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, | |
101 | unsigned long nr_segs, loff_t pos); | |
102 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
103 | unsigned long nr_segs, loff_t pos); | |
104 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); | |
105 | ||
106 | static int sock_close(struct inode *inode, struct file *file); | |
107 | static unsigned int sock_poll(struct file *file, | |
108 | struct poll_table_struct *wait); | |
109 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
110 | #ifdef CONFIG_COMPAT | |
111 | static long compat_sock_ioctl(struct file *file, | |
112 | unsigned int cmd, unsigned long arg); | |
113 | #endif | |
114 | static int sock_fasync(int fd, struct file *filp, int on); | |
115 | static ssize_t sock_sendpage(struct file *file, struct page *page, | |
116 | int offset, size_t size, loff_t *ppos, int more); | |
117 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, | |
118 | struct pipe_inode_info *pipe, size_t len, | |
119 | unsigned int flags); | |
120 | ||
121 | /* | |
122 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
123 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
124 | */ | |
125 | ||
126 | static const struct file_operations socket_file_ops = { | |
127 | .owner = THIS_MODULE, | |
128 | .llseek = no_llseek, | |
129 | .aio_read = sock_aio_read, | |
130 | .aio_write = sock_aio_write, | |
131 | .poll = sock_poll, | |
132 | .unlocked_ioctl = sock_ioctl, | |
133 | #ifdef CONFIG_COMPAT | |
134 | .compat_ioctl = compat_sock_ioctl, | |
135 | #endif | |
136 | .mmap = sock_mmap, | |
137 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
138 | .release = sock_close, | |
139 | .fasync = sock_fasync, | |
140 | .sendpage = sock_sendpage, | |
141 | .splice_write = generic_splice_sendpage, | |
142 | .splice_read = sock_splice_read, | |
143 | }; | |
144 | ||
145 | /* | |
146 | * The protocol list. Each protocol is registered in here. | |
147 | */ | |
148 | ||
149 | static DEFINE_SPINLOCK(net_family_lock); | |
150 | static const struct net_proto_family *net_families[NPROTO] __read_mostly; | |
151 | ||
152 | /* | |
153 | * Statistics counters of the socket lists | |
154 | */ | |
155 | ||
156 | static DEFINE_PER_CPU(int, sockets_in_use) = 0; | |
157 | ||
158 | /* | |
159 | * Support routines. | |
160 | * Move socket addresses back and forth across the kernel/user | |
161 | * divide and look after the messy bits. | |
162 | */ | |
163 | ||
164 | #define MAX_SOCK_ADDR 128 /* 108 for Unix domain - | |
165 | 16 for IP, 16 for IPX, | |
166 | 24 for IPv6, | |
167 | about 80 for AX.25 | |
168 | must be at least one bigger than | |
169 | the AF_UNIX size (see net/unix/af_unix.c | |
170 | :unix_mkname()). | |
171 | */ | |
172 | ||
173 | /** | |
174 | * move_addr_to_kernel - copy a socket address into kernel space | |
175 | * @uaddr: Address in user space | |
176 | * @kaddr: Address in kernel space | |
177 | * @ulen: Length in user space | |
178 | * | |
179 | * The address is copied into kernel space. If the provided address is | |
180 | * too long an error code of -EINVAL is returned. If the copy gives | |
181 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
182 | */ | |
183 | ||
184 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) | |
185 | { | |
186 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) | |
187 | return -EINVAL; | |
188 | if (ulen == 0) | |
189 | return 0; | |
190 | if (copy_from_user(kaddr, uaddr, ulen)) | |
191 | return -EFAULT; | |
192 | return audit_sockaddr(ulen, kaddr); | |
193 | } | |
194 | ||
195 | /** | |
196 | * move_addr_to_user - copy an address to user space | |
197 | * @kaddr: kernel space address | |
198 | * @klen: length of address in kernel | |
199 | * @uaddr: user space address | |
200 | * @ulen: pointer to user length field | |
201 | * | |
202 | * The value pointed to by ulen on entry is the buffer length available. | |
203 | * This is overwritten with the buffer space used. -EINVAL is returned | |
204 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
205 | * is returned if either the buffer or the length field are not | |
206 | * accessible. | |
207 | * After copying the data up to the limit the user specifies, the true | |
208 | * length of the data is written over the length limit the user | |
209 | * specified. Zero is returned for a success. | |
210 | */ | |
211 | ||
212 | int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, | |
213 | int __user *ulen) | |
214 | { | |
215 | int err; | |
216 | int len; | |
217 | ||
218 | err = get_user(len, ulen); | |
219 | if (err) | |
220 | return err; | |
221 | if (len > klen) | |
222 | len = klen; | |
223 | if (len < 0 || len > sizeof(struct sockaddr_storage)) | |
224 | return -EINVAL; | |
225 | if (len) { | |
226 | if (audit_sockaddr(klen, kaddr)) | |
227 | return -ENOMEM; | |
228 | if (copy_to_user(uaddr, kaddr, len)) | |
229 | return -EFAULT; | |
230 | } | |
231 | /* | |
232 | * "fromlen shall refer to the value before truncation.." | |
233 | * 1003.1g | |
234 | */ | |
235 | return __put_user(klen, ulen); | |
236 | } | |
237 | ||
238 | #define SOCKFS_MAGIC 0x534F434B | |
239 | ||
240 | static struct kmem_cache *sock_inode_cachep __read_mostly; | |
241 | ||
242 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
243 | { | |
244 | struct socket_alloc *ei; | |
245 | ||
246 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); | |
247 | if (!ei) | |
248 | return NULL; | |
249 | init_waitqueue_head(&ei->socket.wait); | |
250 | ||
251 | ei->socket.fasync_list = NULL; | |
252 | ei->socket.state = SS_UNCONNECTED; | |
253 | ei->socket.flags = 0; | |
254 | ei->socket.ops = NULL; | |
255 | ei->socket.sk = NULL; | |
256 | ei->socket.file = NULL; | |
257 | ||
258 | return &ei->vfs_inode; | |
259 | } | |
260 | ||
261 | static void sock_destroy_inode(struct inode *inode) | |
262 | { | |
263 | kmem_cache_free(sock_inode_cachep, | |
264 | container_of(inode, struct socket_alloc, vfs_inode)); | |
265 | } | |
266 | ||
267 | static void init_once(void *foo) | |
268 | { | |
269 | struct socket_alloc *ei = (struct socket_alloc *)foo; | |
270 | ||
271 | inode_init_once(&ei->vfs_inode); | |
272 | } | |
273 | ||
274 | static int init_inodecache(void) | |
275 | { | |
276 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
277 | sizeof(struct socket_alloc), | |
278 | 0, | |
279 | (SLAB_HWCACHE_ALIGN | | |
280 | SLAB_RECLAIM_ACCOUNT | | |
281 | SLAB_MEM_SPREAD), | |
282 | init_once); | |
283 | if (sock_inode_cachep == NULL) | |
284 | return -ENOMEM; | |
285 | return 0; | |
286 | } | |
287 | ||
288 | static struct super_operations sockfs_ops = { | |
289 | .alloc_inode = sock_alloc_inode, | |
290 | .destroy_inode =sock_destroy_inode, | |
291 | .statfs = simple_statfs, | |
292 | }; | |
293 | ||
294 | static int sockfs_get_sb(struct file_system_type *fs_type, | |
295 | int flags, const char *dev_name, void *data, | |
296 | struct vfsmount *mnt) | |
297 | { | |
298 | return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC, | |
299 | mnt); | |
300 | } | |
301 | ||
302 | static struct vfsmount *sock_mnt __read_mostly; | |
303 | ||
304 | static struct file_system_type sock_fs_type = { | |
305 | .name = "sockfs", | |
306 | .get_sb = sockfs_get_sb, | |
307 | .kill_sb = kill_anon_super, | |
308 | }; | |
309 | ||
310 | static int sockfs_delete_dentry(struct dentry *dentry) | |
311 | { | |
312 | /* | |
313 | * At creation time, we pretended this dentry was hashed | |
314 | * (by clearing DCACHE_UNHASHED bit in d_flags) | |
315 | * At delete time, we restore the truth : not hashed. | |
316 | * (so that dput() can proceed correctly) | |
317 | */ | |
318 | dentry->d_flags |= DCACHE_UNHASHED; | |
319 | return 0; | |
320 | } | |
321 | ||
322 | /* | |
323 | * sockfs_dname() is called from d_path(). | |
324 | */ | |
325 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
326 | { | |
327 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
328 | dentry->d_inode->i_ino); | |
329 | } | |
330 | ||
331 | static struct dentry_operations sockfs_dentry_operations = { | |
332 | .d_delete = sockfs_delete_dentry, | |
333 | .d_dname = sockfs_dname, | |
334 | }; | |
335 | ||
336 | /* | |
337 | * Obtains the first available file descriptor and sets it up for use. | |
338 | * | |
339 | * These functions create file structures and maps them to fd space | |
340 | * of the current process. On success it returns file descriptor | |
341 | * and file struct implicitly stored in sock->file. | |
342 | * Note that another thread may close file descriptor before we return | |
343 | * from this function. We use the fact that now we do not refer | |
344 | * to socket after mapping. If one day we will need it, this | |
345 | * function will increment ref. count on file by 1. | |
346 | * | |
347 | * In any case returned fd MAY BE not valid! | |
348 | * This race condition is unavoidable | |
349 | * with shared fd spaces, we cannot solve it inside kernel, | |
350 | * but we take care of internal coherence yet. | |
351 | */ | |
352 | ||
353 | static int sock_alloc_fd(struct file **filep, int flags) | |
354 | { | |
355 | int fd; | |
356 | ||
357 | fd = get_unused_fd_flags(flags); | |
358 | if (likely(fd >= 0)) { | |
359 | struct file *file = get_empty_filp(); | |
360 | ||
361 | *filep = file; | |
362 | if (unlikely(!file)) { | |
363 | put_unused_fd(fd); | |
364 | return -ENFILE; | |
365 | } | |
366 | } else | |
367 | *filep = NULL; | |
368 | return fd; | |
369 | } | |
370 | ||
371 | static int sock_attach_fd(struct socket *sock, struct file *file, int flags) | |
372 | { | |
373 | struct dentry *dentry; | |
374 | struct qstr name = { .name = "" }; | |
375 | ||
376 | dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); | |
377 | if (unlikely(!dentry)) | |
378 | return -ENOMEM; | |
379 | ||
380 | dentry->d_op = &sockfs_dentry_operations; | |
381 | /* | |
382 | * We dont want to push this dentry into global dentry hash table. | |
383 | * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED | |
384 | * This permits a working /proc/$pid/fd/XXX on sockets | |
385 | */ | |
386 | dentry->d_flags &= ~DCACHE_UNHASHED; | |
387 | d_instantiate(dentry, SOCK_INODE(sock)); | |
388 | ||
389 | sock->file = file; | |
390 | init_file(file, sock_mnt, dentry, FMODE_READ | FMODE_WRITE, | |
391 | &socket_file_ops); | |
392 | SOCK_INODE(sock)->i_fop = &socket_file_ops; | |
393 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); | |
394 | file->f_pos = 0; | |
395 | file->private_data = sock; | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | int sock_map_fd(struct socket *sock, int flags) | |
401 | { | |
402 | struct file *newfile; | |
403 | int fd = sock_alloc_fd(&newfile, flags); | |
404 | ||
405 | if (likely(fd >= 0)) { | |
406 | int err = sock_attach_fd(sock, newfile, flags); | |
407 | ||
408 | if (unlikely(err < 0)) { | |
409 | put_filp(newfile); | |
410 | put_unused_fd(fd); | |
411 | return err; | |
412 | } | |
413 | fd_install(fd, newfile); | |
414 | } | |
415 | return fd; | |
416 | } | |
417 | ||
418 | static struct socket *sock_from_file(struct file *file, int *err) | |
419 | { | |
420 | if (file->f_op == &socket_file_ops) | |
421 | return file->private_data; /* set in sock_map_fd */ | |
422 | ||
423 | *err = -ENOTSOCK; | |
424 | return NULL; | |
425 | } | |
426 | ||
427 | /** | |
428 | * sockfd_lookup - Go from a file number to its socket slot | |
429 | * @fd: file handle | |
430 | * @err: pointer to an error code return | |
431 | * | |
432 | * The file handle passed in is locked and the socket it is bound | |
433 | * too is returned. If an error occurs the err pointer is overwritten | |
434 | * with a negative errno code and NULL is returned. The function checks | |
435 | * for both invalid handles and passing a handle which is not a socket. | |
436 | * | |
437 | * On a success the socket object pointer is returned. | |
438 | */ | |
439 | ||
440 | struct socket *sockfd_lookup(int fd, int *err) | |
441 | { | |
442 | struct file *file; | |
443 | struct socket *sock; | |
444 | ||
445 | file = fget(fd); | |
446 | if (!file) { | |
447 | *err = -EBADF; | |
448 | return NULL; | |
449 | } | |
450 | ||
451 | sock = sock_from_file(file, err); | |
452 | if (!sock) | |
453 | fput(file); | |
454 | return sock; | |
455 | } | |
456 | ||
457 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) | |
458 | { | |
459 | struct file *file; | |
460 | struct socket *sock; | |
461 | ||
462 | *err = -EBADF; | |
463 | file = fget_light(fd, fput_needed); | |
464 | if (file) { | |
465 | sock = sock_from_file(file, err); | |
466 | if (sock) | |
467 | return sock; | |
468 | fput_light(file, *fput_needed); | |
469 | } | |
470 | return NULL; | |
471 | } | |
472 | ||
473 | /** | |
474 | * sock_alloc - allocate a socket | |
475 | * | |
476 | * Allocate a new inode and socket object. The two are bound together | |
477 | * and initialised. The socket is then returned. If we are out of inodes | |
478 | * NULL is returned. | |
479 | */ | |
480 | ||
481 | static struct socket *sock_alloc(void) | |
482 | { | |
483 | struct inode *inode; | |
484 | struct socket *sock; | |
485 | ||
486 | inode = new_inode(sock_mnt->mnt_sb); | |
487 | if (!inode) | |
488 | return NULL; | |
489 | ||
490 | sock = SOCKET_I(inode); | |
491 | ||
492 | inode->i_mode = S_IFSOCK | S_IRWXUGO; | |
493 | inode->i_uid = current_fsuid(); | |
494 | inode->i_gid = current_fsgid(); | |
495 | ||
496 | get_cpu_var(sockets_in_use)++; | |
497 | put_cpu_var(sockets_in_use); | |
498 | return sock; | |
499 | } | |
500 | ||
501 | /* | |
502 | * In theory you can't get an open on this inode, but /proc provides | |
503 | * a back door. Remember to keep it shut otherwise you'll let the | |
504 | * creepy crawlies in. | |
505 | */ | |
506 | ||
507 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) | |
508 | { | |
509 | return -ENXIO; | |
510 | } | |
511 | ||
512 | const struct file_operations bad_sock_fops = { | |
513 | .owner = THIS_MODULE, | |
514 | .open = sock_no_open, | |
515 | }; | |
516 | ||
517 | /** | |
518 | * sock_release - close a socket | |
519 | * @sock: socket to close | |
520 | * | |
521 | * The socket is released from the protocol stack if it has a release | |
522 | * callback, and the inode is then released if the socket is bound to | |
523 | * an inode not a file. | |
524 | */ | |
525 | ||
526 | void sock_release(struct socket *sock) | |
527 | { | |
528 | if (sock->ops) { | |
529 | struct module *owner = sock->ops->owner; | |
530 | ||
531 | sock->ops->release(sock); | |
532 | sock->ops = NULL; | |
533 | module_put(owner); | |
534 | } | |
535 | ||
536 | if (sock->fasync_list) | |
537 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); | |
538 | ||
539 | get_cpu_var(sockets_in_use)--; | |
540 | put_cpu_var(sockets_in_use); | |
541 | if (!sock->file) { | |
542 | iput(SOCK_INODE(sock)); | |
543 | return; | |
544 | } | |
545 | sock->file = NULL; | |
546 | } | |
547 | ||
548 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
549 | struct msghdr *msg, size_t size) | |
550 | { | |
551 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
552 | int err; | |
553 | ||
554 | si->sock = sock; | |
555 | si->scm = NULL; | |
556 | si->msg = msg; | |
557 | si->size = size; | |
558 | ||
559 | err = security_socket_sendmsg(sock, msg, size); | |
560 | if (err) | |
561 | return err; | |
562 | ||
563 | return sock->ops->sendmsg(iocb, sock, msg, size); | |
564 | } | |
565 | ||
566 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
567 | { | |
568 | struct kiocb iocb; | |
569 | struct sock_iocb siocb; | |
570 | int ret; | |
571 | ||
572 | init_sync_kiocb(&iocb, NULL); | |
573 | iocb.private = &siocb; | |
574 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
575 | if (-EIOCBQUEUED == ret) | |
576 | ret = wait_on_sync_kiocb(&iocb); | |
577 | return ret; | |
578 | } | |
579 | ||
580 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
581 | struct kvec *vec, size_t num, size_t size) | |
582 | { | |
583 | mm_segment_t oldfs = get_fs(); | |
584 | int result; | |
585 | ||
586 | set_fs(KERNEL_DS); | |
587 | /* | |
588 | * the following is safe, since for compiler definitions of kvec and | |
589 | * iovec are identical, yielding the same in-core layout and alignment | |
590 | */ | |
591 | msg->msg_iov = (struct iovec *)vec; | |
592 | msg->msg_iovlen = num; | |
593 | result = sock_sendmsg(sock, msg, size); | |
594 | set_fs(oldfs); | |
595 | return result; | |
596 | } | |
597 | ||
598 | /* | |
599 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
600 | */ | |
601 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
602 | struct sk_buff *skb) | |
603 | { | |
604 | ktime_t kt = skb->tstamp; | |
605 | ||
606 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
607 | struct timeval tv; | |
608 | /* Race occurred between timestamp enabling and packet | |
609 | receiving. Fill in the current time for now. */ | |
610 | if (kt.tv64 == 0) | |
611 | kt = ktime_get_real(); | |
612 | skb->tstamp = kt; | |
613 | tv = ktime_to_timeval(kt); | |
614 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, sizeof(tv), &tv); | |
615 | } else { | |
616 | struct timespec ts; | |
617 | /* Race occurred between timestamp enabling and packet | |
618 | receiving. Fill in the current time for now. */ | |
619 | if (kt.tv64 == 0) | |
620 | kt = ktime_get_real(); | |
621 | skb->tstamp = kt; | |
622 | ts = ktime_to_timespec(kt); | |
623 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, sizeof(ts), &ts); | |
624 | } | |
625 | } | |
626 | ||
627 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); | |
628 | ||
629 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
630 | struct msghdr *msg, size_t size, int flags) | |
631 | { | |
632 | int err; | |
633 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
634 | ||
635 | si->sock = sock; | |
636 | si->scm = NULL; | |
637 | si->msg = msg; | |
638 | si->size = size; | |
639 | si->flags = flags; | |
640 | ||
641 | err = security_socket_recvmsg(sock, msg, size, flags); | |
642 | if (err) | |
643 | return err; | |
644 | ||
645 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); | |
646 | } | |
647 | ||
648 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, | |
649 | size_t size, int flags) | |
650 | { | |
651 | struct kiocb iocb; | |
652 | struct sock_iocb siocb; | |
653 | int ret; | |
654 | ||
655 | init_sync_kiocb(&iocb, NULL); | |
656 | iocb.private = &siocb; | |
657 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
658 | if (-EIOCBQUEUED == ret) | |
659 | ret = wait_on_sync_kiocb(&iocb); | |
660 | return ret; | |
661 | } | |
662 | ||
663 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, | |
664 | struct kvec *vec, size_t num, size_t size, int flags) | |
665 | { | |
666 | mm_segment_t oldfs = get_fs(); | |
667 | int result; | |
668 | ||
669 | set_fs(KERNEL_DS); | |
670 | /* | |
671 | * the following is safe, since for compiler definitions of kvec and | |
672 | * iovec are identical, yielding the same in-core layout and alignment | |
673 | */ | |
674 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; | |
675 | result = sock_recvmsg(sock, msg, size, flags); | |
676 | set_fs(oldfs); | |
677 | return result; | |
678 | } | |
679 | ||
680 | static void sock_aio_dtor(struct kiocb *iocb) | |
681 | { | |
682 | kfree(iocb->private); | |
683 | } | |
684 | ||
685 | static ssize_t sock_sendpage(struct file *file, struct page *page, | |
686 | int offset, size_t size, loff_t *ppos, int more) | |
687 | { | |
688 | struct socket *sock; | |
689 | int flags; | |
690 | ||
691 | sock = file->private_data; | |
692 | ||
693 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; | |
694 | if (more) | |
695 | flags |= MSG_MORE; | |
696 | ||
697 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
698 | } | |
699 | ||
700 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, | |
701 | struct pipe_inode_info *pipe, size_t len, | |
702 | unsigned int flags) | |
703 | { | |
704 | struct socket *sock = file->private_data; | |
705 | ||
706 | if (unlikely(!sock->ops->splice_read)) | |
707 | return -EINVAL; | |
708 | ||
709 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); | |
710 | } | |
711 | ||
712 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, | |
713 | struct sock_iocb *siocb) | |
714 | { | |
715 | if (!is_sync_kiocb(iocb)) { | |
716 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
717 | if (!siocb) | |
718 | return NULL; | |
719 | iocb->ki_dtor = sock_aio_dtor; | |
720 | } | |
721 | ||
722 | siocb->kiocb = iocb; | |
723 | iocb->private = siocb; | |
724 | return siocb; | |
725 | } | |
726 | ||
727 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, | |
728 | struct file *file, const struct iovec *iov, | |
729 | unsigned long nr_segs) | |
730 | { | |
731 | struct socket *sock = file->private_data; | |
732 | size_t size = 0; | |
733 | int i; | |
734 | ||
735 | for (i = 0; i < nr_segs; i++) | |
736 | size += iov[i].iov_len; | |
737 | ||
738 | msg->msg_name = NULL; | |
739 | msg->msg_namelen = 0; | |
740 | msg->msg_control = NULL; | |
741 | msg->msg_controllen = 0; | |
742 | msg->msg_iov = (struct iovec *)iov; | |
743 | msg->msg_iovlen = nr_segs; | |
744 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
745 | ||
746 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
747 | } | |
748 | ||
749 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, | |
750 | unsigned long nr_segs, loff_t pos) | |
751 | { | |
752 | struct sock_iocb siocb, *x; | |
753 | ||
754 | if (pos != 0) | |
755 | return -ESPIPE; | |
756 | ||
757 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
758 | return 0; | |
759 | ||
760 | ||
761 | x = alloc_sock_iocb(iocb, &siocb); | |
762 | if (!x) | |
763 | return -ENOMEM; | |
764 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); | |
765 | } | |
766 | ||
767 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, | |
768 | struct file *file, const struct iovec *iov, | |
769 | unsigned long nr_segs) | |
770 | { | |
771 | struct socket *sock = file->private_data; | |
772 | size_t size = 0; | |
773 | int i; | |
774 | ||
775 | for (i = 0; i < nr_segs; i++) | |
776 | size += iov[i].iov_len; | |
777 | ||
778 | msg->msg_name = NULL; | |
779 | msg->msg_namelen = 0; | |
780 | msg->msg_control = NULL; | |
781 | msg->msg_controllen = 0; | |
782 | msg->msg_iov = (struct iovec *)iov; | |
783 | msg->msg_iovlen = nr_segs; | |
784 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
785 | if (sock->type == SOCK_SEQPACKET) | |
786 | msg->msg_flags |= MSG_EOR; | |
787 | ||
788 | return __sock_sendmsg(iocb, sock, msg, size); | |
789 | } | |
790 | ||
791 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
792 | unsigned long nr_segs, loff_t pos) | |
793 | { | |
794 | struct sock_iocb siocb, *x; | |
795 | ||
796 | if (pos != 0) | |
797 | return -ESPIPE; | |
798 | ||
799 | x = alloc_sock_iocb(iocb, &siocb); | |
800 | if (!x) | |
801 | return -ENOMEM; | |
802 | ||
803 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); | |
804 | } | |
805 | ||
806 | /* | |
807 | * Atomic setting of ioctl hooks to avoid race | |
808 | * with module unload. | |
809 | */ | |
810 | ||
811 | static DEFINE_MUTEX(br_ioctl_mutex); | |
812 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL; | |
813 | ||
814 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) | |
815 | { | |
816 | mutex_lock(&br_ioctl_mutex); | |
817 | br_ioctl_hook = hook; | |
818 | mutex_unlock(&br_ioctl_mutex); | |
819 | } | |
820 | ||
821 | EXPORT_SYMBOL(brioctl_set); | |
822 | ||
823 | static DEFINE_MUTEX(vlan_ioctl_mutex); | |
824 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); | |
825 | ||
826 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) | |
827 | { | |
828 | mutex_lock(&vlan_ioctl_mutex); | |
829 | vlan_ioctl_hook = hook; | |
830 | mutex_unlock(&vlan_ioctl_mutex); | |
831 | } | |
832 | ||
833 | EXPORT_SYMBOL(vlan_ioctl_set); | |
834 | ||
835 | static DEFINE_MUTEX(dlci_ioctl_mutex); | |
836 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); | |
837 | ||
838 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) | |
839 | { | |
840 | mutex_lock(&dlci_ioctl_mutex); | |
841 | dlci_ioctl_hook = hook; | |
842 | mutex_unlock(&dlci_ioctl_mutex); | |
843 | } | |
844 | ||
845 | EXPORT_SYMBOL(dlci_ioctl_set); | |
846 | ||
847 | /* | |
848 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
849 | * what to do with it - that's up to the protocol still. | |
850 | */ | |
851 | ||
852 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
853 | { | |
854 | struct socket *sock; | |
855 | struct sock *sk; | |
856 | void __user *argp = (void __user *)arg; | |
857 | int pid, err; | |
858 | struct net *net; | |
859 | ||
860 | sock = file->private_data; | |
861 | sk = sock->sk; | |
862 | net = sock_net(sk); | |
863 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { | |
864 | err = dev_ioctl(net, cmd, argp); | |
865 | } else | |
866 | #ifdef CONFIG_WIRELESS_EXT | |
867 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { | |
868 | err = dev_ioctl(net, cmd, argp); | |
869 | } else | |
870 | #endif /* CONFIG_WIRELESS_EXT */ | |
871 | switch (cmd) { | |
872 | case FIOSETOWN: | |
873 | case SIOCSPGRP: | |
874 | err = -EFAULT; | |
875 | if (get_user(pid, (int __user *)argp)) | |
876 | break; | |
877 | err = f_setown(sock->file, pid, 1); | |
878 | break; | |
879 | case FIOGETOWN: | |
880 | case SIOCGPGRP: | |
881 | err = put_user(f_getown(sock->file), | |
882 | (int __user *)argp); | |
883 | break; | |
884 | case SIOCGIFBR: | |
885 | case SIOCSIFBR: | |
886 | case SIOCBRADDBR: | |
887 | case SIOCBRDELBR: | |
888 | err = -ENOPKG; | |
889 | if (!br_ioctl_hook) | |
890 | request_module("bridge"); | |
891 | ||
892 | mutex_lock(&br_ioctl_mutex); | |
893 | if (br_ioctl_hook) | |
894 | err = br_ioctl_hook(net, cmd, argp); | |
895 | mutex_unlock(&br_ioctl_mutex); | |
896 | break; | |
897 | case SIOCGIFVLAN: | |
898 | case SIOCSIFVLAN: | |
899 | err = -ENOPKG; | |
900 | if (!vlan_ioctl_hook) | |
901 | request_module("8021q"); | |
902 | ||
903 | mutex_lock(&vlan_ioctl_mutex); | |
904 | if (vlan_ioctl_hook) | |
905 | err = vlan_ioctl_hook(net, argp); | |
906 | mutex_unlock(&vlan_ioctl_mutex); | |
907 | break; | |
908 | case SIOCADDDLCI: | |
909 | case SIOCDELDLCI: | |
910 | err = -ENOPKG; | |
911 | if (!dlci_ioctl_hook) | |
912 | request_module("dlci"); | |
913 | ||
914 | mutex_lock(&dlci_ioctl_mutex); | |
915 | if (dlci_ioctl_hook) | |
916 | err = dlci_ioctl_hook(cmd, argp); | |
917 | mutex_unlock(&dlci_ioctl_mutex); | |
918 | break; | |
919 | default: | |
920 | err = sock->ops->ioctl(sock, cmd, arg); | |
921 | ||
922 | /* | |
923 | * If this ioctl is unknown try to hand it down | |
924 | * to the NIC driver. | |
925 | */ | |
926 | if (err == -ENOIOCTLCMD) | |
927 | err = dev_ioctl(net, cmd, argp); | |
928 | break; | |
929 | } | |
930 | return err; | |
931 | } | |
932 | ||
933 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
934 | { | |
935 | int err; | |
936 | struct socket *sock = NULL; | |
937 | ||
938 | err = security_socket_create(family, type, protocol, 1); | |
939 | if (err) | |
940 | goto out; | |
941 | ||
942 | sock = sock_alloc(); | |
943 | if (!sock) { | |
944 | err = -ENOMEM; | |
945 | goto out; | |
946 | } | |
947 | ||
948 | sock->type = type; | |
949 | err = security_socket_post_create(sock, family, type, protocol, 1); | |
950 | if (err) | |
951 | goto out_release; | |
952 | ||
953 | out: | |
954 | *res = sock; | |
955 | return err; | |
956 | out_release: | |
957 | sock_release(sock); | |
958 | sock = NULL; | |
959 | goto out; | |
960 | } | |
961 | ||
962 | /* No kernel lock held - perfect */ | |
963 | static unsigned int sock_poll(struct file *file, poll_table *wait) | |
964 | { | |
965 | struct socket *sock; | |
966 | ||
967 | /* | |
968 | * We can't return errors to poll, so it's either yes or no. | |
969 | */ | |
970 | sock = file->private_data; | |
971 | return sock->ops->poll(file, sock, wait); | |
972 | } | |
973 | ||
974 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) | |
975 | { | |
976 | struct socket *sock = file->private_data; | |
977 | ||
978 | return sock->ops->mmap(file, sock, vma); | |
979 | } | |
980 | ||
981 | static int sock_close(struct inode *inode, struct file *filp) | |
982 | { | |
983 | /* | |
984 | * It was possible the inode is NULL we were | |
985 | * closing an unfinished socket. | |
986 | */ | |
987 | ||
988 | if (!inode) { | |
989 | printk(KERN_DEBUG "sock_close: NULL inode\n"); | |
990 | return 0; | |
991 | } | |
992 | sock_release(SOCKET_I(inode)); | |
993 | return 0; | |
994 | } | |
995 | ||
996 | /* | |
997 | * Update the socket async list | |
998 | * | |
999 | * Fasync_list locking strategy. | |
1000 | * | |
1001 | * 1. fasync_list is modified only under process context socket lock | |
1002 | * i.e. under semaphore. | |
1003 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
1004 | * or under socket lock. | |
1005 | * 3. fasync_list can be used from softirq context, so that | |
1006 | * modification under socket lock have to be enhanced with | |
1007 | * write_lock_bh(&sk->sk_callback_lock). | |
1008 | * --ANK (990710) | |
1009 | */ | |
1010 | ||
1011 | static int sock_fasync(int fd, struct file *filp, int on) | |
1012 | { | |
1013 | struct fasync_struct *fa, *fna = NULL, **prev; | |
1014 | struct socket *sock; | |
1015 | struct sock *sk; | |
1016 | ||
1017 | if (on) { | |
1018 | fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL); | |
1019 | if (fna == NULL) | |
1020 | return -ENOMEM; | |
1021 | } | |
1022 | ||
1023 | sock = filp->private_data; | |
1024 | ||
1025 | sk = sock->sk; | |
1026 | if (sk == NULL) { | |
1027 | kfree(fna); | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | ||
1031 | lock_sock(sk); | |
1032 | ||
1033 | prev = &(sock->fasync_list); | |
1034 | ||
1035 | for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev) | |
1036 | if (fa->fa_file == filp) | |
1037 | break; | |
1038 | ||
1039 | if (on) { | |
1040 | if (fa != NULL) { | |
1041 | write_lock_bh(&sk->sk_callback_lock); | |
1042 | fa->fa_fd = fd; | |
1043 | write_unlock_bh(&sk->sk_callback_lock); | |
1044 | ||
1045 | kfree(fna); | |
1046 | goto out; | |
1047 | } | |
1048 | fna->fa_file = filp; | |
1049 | fna->fa_fd = fd; | |
1050 | fna->magic = FASYNC_MAGIC; | |
1051 | fna->fa_next = sock->fasync_list; | |
1052 | write_lock_bh(&sk->sk_callback_lock); | |
1053 | sock->fasync_list = fna; | |
1054 | write_unlock_bh(&sk->sk_callback_lock); | |
1055 | } else { | |
1056 | if (fa != NULL) { | |
1057 | write_lock_bh(&sk->sk_callback_lock); | |
1058 | *prev = fa->fa_next; | |
1059 | write_unlock_bh(&sk->sk_callback_lock); | |
1060 | kfree(fa); | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | out: | |
1065 | release_sock(sock->sk); | |
1066 | return 0; | |
1067 | } | |
1068 | ||
1069 | /* This function may be called only under socket lock or callback_lock */ | |
1070 | ||
1071 | int sock_wake_async(struct socket *sock, int how, int band) | |
1072 | { | |
1073 | if (!sock || !sock->fasync_list) | |
1074 | return -1; | |
1075 | switch (how) { | |
1076 | case SOCK_WAKE_WAITD: | |
1077 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) | |
1078 | break; | |
1079 | goto call_kill; | |
1080 | case SOCK_WAKE_SPACE: | |
1081 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) | |
1082 | break; | |
1083 | /* fall through */ | |
1084 | case SOCK_WAKE_IO: | |
1085 | call_kill: | |
1086 | __kill_fasync(sock->fasync_list, SIGIO, band); | |
1087 | break; | |
1088 | case SOCK_WAKE_URG: | |
1089 | __kill_fasync(sock->fasync_list, SIGURG, band); | |
1090 | } | |
1091 | return 0; | |
1092 | } | |
1093 | ||
1094 | static int __sock_create(struct net *net, int family, int type, int protocol, | |
1095 | struct socket **res, int kern) | |
1096 | { | |
1097 | int err; | |
1098 | struct socket *sock; | |
1099 | const struct net_proto_family *pf; | |
1100 | ||
1101 | /* | |
1102 | * Check protocol is in range | |
1103 | */ | |
1104 | if (family < 0 || family >= NPROTO) | |
1105 | return -EAFNOSUPPORT; | |
1106 | if (type < 0 || type >= SOCK_MAX) | |
1107 | return -EINVAL; | |
1108 | ||
1109 | /* Compatibility. | |
1110 | ||
1111 | This uglymoron is moved from INET layer to here to avoid | |
1112 | deadlock in module load. | |
1113 | */ | |
1114 | if (family == PF_INET && type == SOCK_PACKET) { | |
1115 | static int warned; | |
1116 | if (!warned) { | |
1117 | warned = 1; | |
1118 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", | |
1119 | current->comm); | |
1120 | } | |
1121 | family = PF_PACKET; | |
1122 | } | |
1123 | ||
1124 | err = security_socket_create(family, type, protocol, kern); | |
1125 | if (err) | |
1126 | return err; | |
1127 | ||
1128 | /* | |
1129 | * Allocate the socket and allow the family to set things up. if | |
1130 | * the protocol is 0, the family is instructed to select an appropriate | |
1131 | * default. | |
1132 | */ | |
1133 | sock = sock_alloc(); | |
1134 | if (!sock) { | |
1135 | if (net_ratelimit()) | |
1136 | printk(KERN_WARNING "socket: no more sockets\n"); | |
1137 | return -ENFILE; /* Not exactly a match, but its the | |
1138 | closest posix thing */ | |
1139 | } | |
1140 | ||
1141 | sock->type = type; | |
1142 | ||
1143 | #ifdef CONFIG_MODULES | |
1144 | /* Attempt to load a protocol module if the find failed. | |
1145 | * | |
1146 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1147 | * requested real, full-featured networking support upon configuration. | |
1148 | * Otherwise module support will break! | |
1149 | */ | |
1150 | if (net_families[family] == NULL) | |
1151 | request_module("net-pf-%d", family); | |
1152 | #endif | |
1153 | ||
1154 | rcu_read_lock(); | |
1155 | pf = rcu_dereference(net_families[family]); | |
1156 | err = -EAFNOSUPPORT; | |
1157 | if (!pf) | |
1158 | goto out_release; | |
1159 | ||
1160 | /* | |
1161 | * We will call the ->create function, that possibly is in a loadable | |
1162 | * module, so we have to bump that loadable module refcnt first. | |
1163 | */ | |
1164 | if (!try_module_get(pf->owner)) | |
1165 | goto out_release; | |
1166 | ||
1167 | /* Now protected by module ref count */ | |
1168 | rcu_read_unlock(); | |
1169 | ||
1170 | err = pf->create(net, sock, protocol); | |
1171 | if (err < 0) | |
1172 | goto out_module_put; | |
1173 | ||
1174 | /* | |
1175 | * Now to bump the refcnt of the [loadable] module that owns this | |
1176 | * socket at sock_release time we decrement its refcnt. | |
1177 | */ | |
1178 | if (!try_module_get(sock->ops->owner)) | |
1179 | goto out_module_busy; | |
1180 | ||
1181 | /* | |
1182 | * Now that we're done with the ->create function, the [loadable] | |
1183 | * module can have its refcnt decremented | |
1184 | */ | |
1185 | module_put(pf->owner); | |
1186 | err = security_socket_post_create(sock, family, type, protocol, kern); | |
1187 | if (err) | |
1188 | goto out_sock_release; | |
1189 | *res = sock; | |
1190 | ||
1191 | return 0; | |
1192 | ||
1193 | out_module_busy: | |
1194 | err = -EAFNOSUPPORT; | |
1195 | out_module_put: | |
1196 | sock->ops = NULL; | |
1197 | module_put(pf->owner); | |
1198 | out_sock_release: | |
1199 | sock_release(sock); | |
1200 | return err; | |
1201 | ||
1202 | out_release: | |
1203 | rcu_read_unlock(); | |
1204 | goto out_sock_release; | |
1205 | } | |
1206 | ||
1207 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1208 | { | |
1209 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); | |
1210 | } | |
1211 | ||
1212 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1213 | { | |
1214 | return __sock_create(&init_net, family, type, protocol, res, 1); | |
1215 | } | |
1216 | ||
1217 | asmlinkage long sys_socket(int family, int type, int protocol) | |
1218 | { | |
1219 | int retval; | |
1220 | struct socket *sock; | |
1221 | int flags; | |
1222 | ||
1223 | /* Check the SOCK_* constants for consistency. */ | |
1224 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1225 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1226 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1227 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1228 | ||
1229 | flags = type & ~SOCK_TYPE_MASK; | |
1230 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1231 | return -EINVAL; | |
1232 | type &= SOCK_TYPE_MASK; | |
1233 | ||
1234 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1235 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1236 | ||
1237 | retval = sock_create(family, type, protocol, &sock); | |
1238 | if (retval < 0) | |
1239 | goto out; | |
1240 | ||
1241 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); | |
1242 | if (retval < 0) | |
1243 | goto out_release; | |
1244 | ||
1245 | out: | |
1246 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1247 | return retval; | |
1248 | ||
1249 | out_release: | |
1250 | sock_release(sock); | |
1251 | return retval; | |
1252 | } | |
1253 | ||
1254 | /* | |
1255 | * Create a pair of connected sockets. | |
1256 | */ | |
1257 | ||
1258 | asmlinkage long sys_socketpair(int family, int type, int protocol, | |
1259 | int __user *usockvec) | |
1260 | { | |
1261 | struct socket *sock1, *sock2; | |
1262 | int fd1, fd2, err; | |
1263 | struct file *newfile1, *newfile2; | |
1264 | int flags; | |
1265 | ||
1266 | flags = type & ~SOCK_TYPE_MASK; | |
1267 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1268 | return -EINVAL; | |
1269 | type &= SOCK_TYPE_MASK; | |
1270 | ||
1271 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1272 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1273 | ||
1274 | /* | |
1275 | * Obtain the first socket and check if the underlying protocol | |
1276 | * supports the socketpair call. | |
1277 | */ | |
1278 | ||
1279 | err = sock_create(family, type, protocol, &sock1); | |
1280 | if (err < 0) | |
1281 | goto out; | |
1282 | ||
1283 | err = sock_create(family, type, protocol, &sock2); | |
1284 | if (err < 0) | |
1285 | goto out_release_1; | |
1286 | ||
1287 | err = sock1->ops->socketpair(sock1, sock2); | |
1288 | if (err < 0) | |
1289 | goto out_release_both; | |
1290 | ||
1291 | fd1 = sock_alloc_fd(&newfile1, flags & O_CLOEXEC); | |
1292 | if (unlikely(fd1 < 0)) { | |
1293 | err = fd1; | |
1294 | goto out_release_both; | |
1295 | } | |
1296 | ||
1297 | fd2 = sock_alloc_fd(&newfile2, flags & O_CLOEXEC); | |
1298 | if (unlikely(fd2 < 0)) { | |
1299 | err = fd2; | |
1300 | put_filp(newfile1); | |
1301 | put_unused_fd(fd1); | |
1302 | goto out_release_both; | |
1303 | } | |
1304 | ||
1305 | err = sock_attach_fd(sock1, newfile1, flags & O_NONBLOCK); | |
1306 | if (unlikely(err < 0)) { | |
1307 | goto out_fd2; | |
1308 | } | |
1309 | ||
1310 | err = sock_attach_fd(sock2, newfile2, flags & O_NONBLOCK); | |
1311 | if (unlikely(err < 0)) { | |
1312 | fput(newfile1); | |
1313 | goto out_fd1; | |
1314 | } | |
1315 | ||
1316 | audit_fd_pair(fd1, fd2); | |
1317 | fd_install(fd1, newfile1); | |
1318 | fd_install(fd2, newfile2); | |
1319 | /* fd1 and fd2 may be already another descriptors. | |
1320 | * Not kernel problem. | |
1321 | */ | |
1322 | ||
1323 | err = put_user(fd1, &usockvec[0]); | |
1324 | if (!err) | |
1325 | err = put_user(fd2, &usockvec[1]); | |
1326 | if (!err) | |
1327 | return 0; | |
1328 | ||
1329 | sys_close(fd2); | |
1330 | sys_close(fd1); | |
1331 | return err; | |
1332 | ||
1333 | out_release_both: | |
1334 | sock_release(sock2); | |
1335 | out_release_1: | |
1336 | sock_release(sock1); | |
1337 | out: | |
1338 | return err; | |
1339 | ||
1340 | out_fd2: | |
1341 | put_filp(newfile1); | |
1342 | sock_release(sock1); | |
1343 | out_fd1: | |
1344 | put_filp(newfile2); | |
1345 | sock_release(sock2); | |
1346 | put_unused_fd(fd1); | |
1347 | put_unused_fd(fd2); | |
1348 | goto out; | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * Bind a name to a socket. Nothing much to do here since it's | |
1353 | * the protocol's responsibility to handle the local address. | |
1354 | * | |
1355 | * We move the socket address to kernel space before we call | |
1356 | * the protocol layer (having also checked the address is ok). | |
1357 | */ | |
1358 | ||
1359 | asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen) | |
1360 | { | |
1361 | struct socket *sock; | |
1362 | struct sockaddr_storage address; | |
1363 | int err, fput_needed; | |
1364 | ||
1365 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1366 | if (sock) { | |
1367 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); | |
1368 | if (err >= 0) { | |
1369 | err = security_socket_bind(sock, | |
1370 | (struct sockaddr *)&address, | |
1371 | addrlen); | |
1372 | if (!err) | |
1373 | err = sock->ops->bind(sock, | |
1374 | (struct sockaddr *) | |
1375 | &address, addrlen); | |
1376 | } | |
1377 | fput_light(sock->file, fput_needed); | |
1378 | } | |
1379 | return err; | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * Perform a listen. Basically, we allow the protocol to do anything | |
1384 | * necessary for a listen, and if that works, we mark the socket as | |
1385 | * ready for listening. | |
1386 | */ | |
1387 | ||
1388 | asmlinkage long sys_listen(int fd, int backlog) | |
1389 | { | |
1390 | struct socket *sock; | |
1391 | int err, fput_needed; | |
1392 | int somaxconn; | |
1393 | ||
1394 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1395 | if (sock) { | |
1396 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; | |
1397 | if ((unsigned)backlog > somaxconn) | |
1398 | backlog = somaxconn; | |
1399 | ||
1400 | err = security_socket_listen(sock, backlog); | |
1401 | if (!err) | |
1402 | err = sock->ops->listen(sock, backlog); | |
1403 | ||
1404 | fput_light(sock->file, fput_needed); | |
1405 | } | |
1406 | return err; | |
1407 | } | |
1408 | ||
1409 | /* | |
1410 | * For accept, we attempt to create a new socket, set up the link | |
1411 | * with the client, wake up the client, then return the new | |
1412 | * connected fd. We collect the address of the connector in kernel | |
1413 | * space and move it to user at the very end. This is unclean because | |
1414 | * we open the socket then return an error. | |
1415 | * | |
1416 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1417 | * status to recvmsg. We need to add that support in a way thats | |
1418 | * clean when we restucture accept also. | |
1419 | */ | |
1420 | ||
1421 | asmlinkage long sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, | |
1422 | int __user *upeer_addrlen, int flags) | |
1423 | { | |
1424 | struct socket *sock, *newsock; | |
1425 | struct file *newfile; | |
1426 | int err, len, newfd, fput_needed; | |
1427 | struct sockaddr_storage address; | |
1428 | ||
1429 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1430 | return -EINVAL; | |
1431 | ||
1432 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1433 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1434 | ||
1435 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1436 | if (!sock) | |
1437 | goto out; | |
1438 | ||
1439 | err = -ENFILE; | |
1440 | if (!(newsock = sock_alloc())) | |
1441 | goto out_put; | |
1442 | ||
1443 | newsock->type = sock->type; | |
1444 | newsock->ops = sock->ops; | |
1445 | ||
1446 | /* | |
1447 | * We don't need try_module_get here, as the listening socket (sock) | |
1448 | * has the protocol module (sock->ops->owner) held. | |
1449 | */ | |
1450 | __module_get(newsock->ops->owner); | |
1451 | ||
1452 | newfd = sock_alloc_fd(&newfile, flags & O_CLOEXEC); | |
1453 | if (unlikely(newfd < 0)) { | |
1454 | err = newfd; | |
1455 | sock_release(newsock); | |
1456 | goto out_put; | |
1457 | } | |
1458 | ||
1459 | err = sock_attach_fd(newsock, newfile, flags & O_NONBLOCK); | |
1460 | if (err < 0) | |
1461 | goto out_fd_simple; | |
1462 | ||
1463 | err = security_socket_accept(sock, newsock); | |
1464 | if (err) | |
1465 | goto out_fd; | |
1466 | ||
1467 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); | |
1468 | if (err < 0) | |
1469 | goto out_fd; | |
1470 | ||
1471 | if (upeer_sockaddr) { | |
1472 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, | |
1473 | &len, 2) < 0) { | |
1474 | err = -ECONNABORTED; | |
1475 | goto out_fd; | |
1476 | } | |
1477 | err = move_addr_to_user((struct sockaddr *)&address, | |
1478 | len, upeer_sockaddr, upeer_addrlen); | |
1479 | if (err < 0) | |
1480 | goto out_fd; | |
1481 | } | |
1482 | ||
1483 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1484 | ||
1485 | fd_install(newfd, newfile); | |
1486 | err = newfd; | |
1487 | ||
1488 | security_socket_post_accept(sock, newsock); | |
1489 | ||
1490 | out_put: | |
1491 | fput_light(sock->file, fput_needed); | |
1492 | out: | |
1493 | return err; | |
1494 | out_fd_simple: | |
1495 | sock_release(newsock); | |
1496 | put_filp(newfile); | |
1497 | put_unused_fd(newfd); | |
1498 | goto out_put; | |
1499 | out_fd: | |
1500 | fput(newfile); | |
1501 | put_unused_fd(newfd); | |
1502 | goto out_put; | |
1503 | } | |
1504 | ||
1505 | asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, | |
1506 | int __user *upeer_addrlen) | |
1507 | { | |
1508 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); | |
1509 | } | |
1510 | ||
1511 | /* | |
1512 | * Attempt to connect to a socket with the server address. The address | |
1513 | * is in user space so we verify it is OK and move it to kernel space. | |
1514 | * | |
1515 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1516 | * break bindings | |
1517 | * | |
1518 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1519 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1520 | * include the -EINPROGRESS status for such sockets. | |
1521 | */ | |
1522 | ||
1523 | asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr, | |
1524 | int addrlen) | |
1525 | { | |
1526 | struct socket *sock; | |
1527 | struct sockaddr_storage address; | |
1528 | int err, fput_needed; | |
1529 | ||
1530 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1531 | if (!sock) | |
1532 | goto out; | |
1533 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); | |
1534 | if (err < 0) | |
1535 | goto out_put; | |
1536 | ||
1537 | err = | |
1538 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); | |
1539 | if (err) | |
1540 | goto out_put; | |
1541 | ||
1542 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, | |
1543 | sock->file->f_flags); | |
1544 | out_put: | |
1545 | fput_light(sock->file, fput_needed); | |
1546 | out: | |
1547 | return err; | |
1548 | } | |
1549 | ||
1550 | /* | |
1551 | * Get the local address ('name') of a socket object. Move the obtained | |
1552 | * name to user space. | |
1553 | */ | |
1554 | ||
1555 | asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr, | |
1556 | int __user *usockaddr_len) | |
1557 | { | |
1558 | struct socket *sock; | |
1559 | struct sockaddr_storage address; | |
1560 | int len, err, fput_needed; | |
1561 | ||
1562 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1563 | if (!sock) | |
1564 | goto out; | |
1565 | ||
1566 | err = security_socket_getsockname(sock); | |
1567 | if (err) | |
1568 | goto out_put; | |
1569 | ||
1570 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); | |
1571 | if (err) | |
1572 | goto out_put; | |
1573 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); | |
1574 | ||
1575 | out_put: | |
1576 | fput_light(sock->file, fput_needed); | |
1577 | out: | |
1578 | return err; | |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * Get the remote address ('name') of a socket object. Move the obtained | |
1583 | * name to user space. | |
1584 | */ | |
1585 | ||
1586 | asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr, | |
1587 | int __user *usockaddr_len) | |
1588 | { | |
1589 | struct socket *sock; | |
1590 | struct sockaddr_storage address; | |
1591 | int len, err, fput_needed; | |
1592 | ||
1593 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1594 | if (sock != NULL) { | |
1595 | err = security_socket_getpeername(sock); | |
1596 | if (err) { | |
1597 | fput_light(sock->file, fput_needed); | |
1598 | return err; | |
1599 | } | |
1600 | ||
1601 | err = | |
1602 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, | |
1603 | 1); | |
1604 | if (!err) | |
1605 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, | |
1606 | usockaddr_len); | |
1607 | fput_light(sock->file, fput_needed); | |
1608 | } | |
1609 | return err; | |
1610 | } | |
1611 | ||
1612 | /* | |
1613 | * Send a datagram to a given address. We move the address into kernel | |
1614 | * space and check the user space data area is readable before invoking | |
1615 | * the protocol. | |
1616 | */ | |
1617 | ||
1618 | asmlinkage long sys_sendto(int fd, void __user *buff, size_t len, | |
1619 | unsigned flags, struct sockaddr __user *addr, | |
1620 | int addr_len) | |
1621 | { | |
1622 | struct socket *sock; | |
1623 | struct sockaddr_storage address; | |
1624 | int err; | |
1625 | struct msghdr msg; | |
1626 | struct iovec iov; | |
1627 | int fput_needed; | |
1628 | ||
1629 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1630 | if (!sock) | |
1631 | goto out; | |
1632 | ||
1633 | iov.iov_base = buff; | |
1634 | iov.iov_len = len; | |
1635 | msg.msg_name = NULL; | |
1636 | msg.msg_iov = &iov; | |
1637 | msg.msg_iovlen = 1; | |
1638 | msg.msg_control = NULL; | |
1639 | msg.msg_controllen = 0; | |
1640 | msg.msg_namelen = 0; | |
1641 | if (addr) { | |
1642 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); | |
1643 | if (err < 0) | |
1644 | goto out_put; | |
1645 | msg.msg_name = (struct sockaddr *)&address; | |
1646 | msg.msg_namelen = addr_len; | |
1647 | } | |
1648 | if (sock->file->f_flags & O_NONBLOCK) | |
1649 | flags |= MSG_DONTWAIT; | |
1650 | msg.msg_flags = flags; | |
1651 | err = sock_sendmsg(sock, &msg, len); | |
1652 | ||
1653 | out_put: | |
1654 | fput_light(sock->file, fput_needed); | |
1655 | out: | |
1656 | return err; | |
1657 | } | |
1658 | ||
1659 | /* | |
1660 | * Send a datagram down a socket. | |
1661 | */ | |
1662 | ||
1663 | asmlinkage long sys_send(int fd, void __user *buff, size_t len, unsigned flags) | |
1664 | { | |
1665 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1666 | } | |
1667 | ||
1668 | /* | |
1669 | * Receive a frame from the socket and optionally record the address of the | |
1670 | * sender. We verify the buffers are writable and if needed move the | |
1671 | * sender address from kernel to user space. | |
1672 | */ | |
1673 | ||
1674 | asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size, | |
1675 | unsigned flags, struct sockaddr __user *addr, | |
1676 | int __user *addr_len) | |
1677 | { | |
1678 | struct socket *sock; | |
1679 | struct iovec iov; | |
1680 | struct msghdr msg; | |
1681 | struct sockaddr_storage address; | |
1682 | int err, err2; | |
1683 | int fput_needed; | |
1684 | ||
1685 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1686 | if (!sock) | |
1687 | goto out; | |
1688 | ||
1689 | msg.msg_control = NULL; | |
1690 | msg.msg_controllen = 0; | |
1691 | msg.msg_iovlen = 1; | |
1692 | msg.msg_iov = &iov; | |
1693 | iov.iov_len = size; | |
1694 | iov.iov_base = ubuf; | |
1695 | msg.msg_name = (struct sockaddr *)&address; | |
1696 | msg.msg_namelen = sizeof(address); | |
1697 | if (sock->file->f_flags & O_NONBLOCK) | |
1698 | flags |= MSG_DONTWAIT; | |
1699 | err = sock_recvmsg(sock, &msg, size, flags); | |
1700 | ||
1701 | if (err >= 0 && addr != NULL) { | |
1702 | err2 = move_addr_to_user((struct sockaddr *)&address, | |
1703 | msg.msg_namelen, addr, addr_len); | |
1704 | if (err2 < 0) | |
1705 | err = err2; | |
1706 | } | |
1707 | ||
1708 | fput_light(sock->file, fput_needed); | |
1709 | out: | |
1710 | return err; | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * Receive a datagram from a socket. | |
1715 | */ | |
1716 | ||
1717 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, | |
1718 | unsigned flags) | |
1719 | { | |
1720 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1721 | } | |
1722 | ||
1723 | /* | |
1724 | * Set a socket option. Because we don't know the option lengths we have | |
1725 | * to pass the user mode parameter for the protocols to sort out. | |
1726 | */ | |
1727 | ||
1728 | asmlinkage long sys_setsockopt(int fd, int level, int optname, | |
1729 | char __user *optval, int optlen) | |
1730 | { | |
1731 | int err, fput_needed; | |
1732 | struct socket *sock; | |
1733 | ||
1734 | if (optlen < 0) | |
1735 | return -EINVAL; | |
1736 | ||
1737 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1738 | if (sock != NULL) { | |
1739 | err = security_socket_setsockopt(sock, level, optname); | |
1740 | if (err) | |
1741 | goto out_put; | |
1742 | ||
1743 | if (level == SOL_SOCKET) | |
1744 | err = | |
1745 | sock_setsockopt(sock, level, optname, optval, | |
1746 | optlen); | |
1747 | else | |
1748 | err = | |
1749 | sock->ops->setsockopt(sock, level, optname, optval, | |
1750 | optlen); | |
1751 | out_put: | |
1752 | fput_light(sock->file, fput_needed); | |
1753 | } | |
1754 | return err; | |
1755 | } | |
1756 | ||
1757 | /* | |
1758 | * Get a socket option. Because we don't know the option lengths we have | |
1759 | * to pass a user mode parameter for the protocols to sort out. | |
1760 | */ | |
1761 | ||
1762 | asmlinkage long sys_getsockopt(int fd, int level, int optname, | |
1763 | char __user *optval, int __user *optlen) | |
1764 | { | |
1765 | int err, fput_needed; | |
1766 | struct socket *sock; | |
1767 | ||
1768 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1769 | if (sock != NULL) { | |
1770 | err = security_socket_getsockopt(sock, level, optname); | |
1771 | if (err) | |
1772 | goto out_put; | |
1773 | ||
1774 | if (level == SOL_SOCKET) | |
1775 | err = | |
1776 | sock_getsockopt(sock, level, optname, optval, | |
1777 | optlen); | |
1778 | else | |
1779 | err = | |
1780 | sock->ops->getsockopt(sock, level, optname, optval, | |
1781 | optlen); | |
1782 | out_put: | |
1783 | fput_light(sock->file, fput_needed); | |
1784 | } | |
1785 | return err; | |
1786 | } | |
1787 | ||
1788 | /* | |
1789 | * Shutdown a socket. | |
1790 | */ | |
1791 | ||
1792 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) | |
1793 | { | |
1794 | int err, fput_needed; | |
1795 | struct socket *sock; | |
1796 | ||
1797 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1798 | if (sock != NULL) { | |
1799 | err = security_socket_shutdown(sock, how); | |
1800 | if (!err) | |
1801 | err = sock->ops->shutdown(sock, how); | |
1802 | fput_light(sock->file, fput_needed); | |
1803 | } | |
1804 | return err; | |
1805 | } | |
1806 | ||
1807 | /* A couple of helpful macros for getting the address of the 32/64 bit | |
1808 | * fields which are the same type (int / unsigned) on our platforms. | |
1809 | */ | |
1810 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1811 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1812 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1813 | ||
1814 | /* | |
1815 | * BSD sendmsg interface | |
1816 | */ | |
1817 | ||
1818 | asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) | |
1819 | { | |
1820 | struct compat_msghdr __user *msg_compat = | |
1821 | (struct compat_msghdr __user *)msg; | |
1822 | struct socket *sock; | |
1823 | struct sockaddr_storage address; | |
1824 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; | |
1825 | unsigned char ctl[sizeof(struct cmsghdr) + 20] | |
1826 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); | |
1827 | /* 20 is size of ipv6_pktinfo */ | |
1828 | unsigned char *ctl_buf = ctl; | |
1829 | struct msghdr msg_sys; | |
1830 | int err, ctl_len, iov_size, total_len; | |
1831 | int fput_needed; | |
1832 | ||
1833 | err = -EFAULT; | |
1834 | if (MSG_CMSG_COMPAT & flags) { | |
1835 | if (get_compat_msghdr(&msg_sys, msg_compat)) | |
1836 | return -EFAULT; | |
1837 | } | |
1838 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) | |
1839 | return -EFAULT; | |
1840 | ||
1841 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1842 | if (!sock) | |
1843 | goto out; | |
1844 | ||
1845 | /* do not move before msg_sys is valid */ | |
1846 | err = -EMSGSIZE; | |
1847 | if (msg_sys.msg_iovlen > UIO_MAXIOV) | |
1848 | goto out_put; | |
1849 | ||
1850 | /* Check whether to allocate the iovec area */ | |
1851 | err = -ENOMEM; | |
1852 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); | |
1853 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { | |
1854 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); | |
1855 | if (!iov) | |
1856 | goto out_put; | |
1857 | } | |
1858 | ||
1859 | /* This will also move the address data into kernel space */ | |
1860 | if (MSG_CMSG_COMPAT & flags) { | |
1861 | err = verify_compat_iovec(&msg_sys, iov, | |
1862 | (struct sockaddr *)&address, | |
1863 | VERIFY_READ); | |
1864 | } else | |
1865 | err = verify_iovec(&msg_sys, iov, | |
1866 | (struct sockaddr *)&address, | |
1867 | VERIFY_READ); | |
1868 | if (err < 0) | |
1869 | goto out_freeiov; | |
1870 | total_len = err; | |
1871 | ||
1872 | err = -ENOBUFS; | |
1873 | ||
1874 | if (msg_sys.msg_controllen > INT_MAX) | |
1875 | goto out_freeiov; | |
1876 | ctl_len = msg_sys.msg_controllen; | |
1877 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { | |
1878 | err = | |
1879 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, | |
1880 | sizeof(ctl)); | |
1881 | if (err) | |
1882 | goto out_freeiov; | |
1883 | ctl_buf = msg_sys.msg_control; | |
1884 | ctl_len = msg_sys.msg_controllen; | |
1885 | } else if (ctl_len) { | |
1886 | if (ctl_len > sizeof(ctl)) { | |
1887 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); | |
1888 | if (ctl_buf == NULL) | |
1889 | goto out_freeiov; | |
1890 | } | |
1891 | err = -EFAULT; | |
1892 | /* | |
1893 | * Careful! Before this, msg_sys.msg_control contains a user pointer. | |
1894 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted | |
1895 | * checking falls down on this. | |
1896 | */ | |
1897 | if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, | |
1898 | ctl_len)) | |
1899 | goto out_freectl; | |
1900 | msg_sys.msg_control = ctl_buf; | |
1901 | } | |
1902 | msg_sys.msg_flags = flags; | |
1903 | ||
1904 | if (sock->file->f_flags & O_NONBLOCK) | |
1905 | msg_sys.msg_flags |= MSG_DONTWAIT; | |
1906 | err = sock_sendmsg(sock, &msg_sys, total_len); | |
1907 | ||
1908 | out_freectl: | |
1909 | if (ctl_buf != ctl) | |
1910 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); | |
1911 | out_freeiov: | |
1912 | if (iov != iovstack) | |
1913 | sock_kfree_s(sock->sk, iov, iov_size); | |
1914 | out_put: | |
1915 | fput_light(sock->file, fput_needed); | |
1916 | out: | |
1917 | return err; | |
1918 | } | |
1919 | ||
1920 | /* | |
1921 | * BSD recvmsg interface | |
1922 | */ | |
1923 | ||
1924 | asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, | |
1925 | unsigned int flags) | |
1926 | { | |
1927 | struct compat_msghdr __user *msg_compat = | |
1928 | (struct compat_msghdr __user *)msg; | |
1929 | struct socket *sock; | |
1930 | struct iovec iovstack[UIO_FASTIOV]; | |
1931 | struct iovec *iov = iovstack; | |
1932 | struct msghdr msg_sys; | |
1933 | unsigned long cmsg_ptr; | |
1934 | int err, iov_size, total_len, len; | |
1935 | int fput_needed; | |
1936 | ||
1937 | /* kernel mode address */ | |
1938 | struct sockaddr_storage addr; | |
1939 | ||
1940 | /* user mode address pointers */ | |
1941 | struct sockaddr __user *uaddr; | |
1942 | int __user *uaddr_len; | |
1943 | ||
1944 | if (MSG_CMSG_COMPAT & flags) { | |
1945 | if (get_compat_msghdr(&msg_sys, msg_compat)) | |
1946 | return -EFAULT; | |
1947 | } | |
1948 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) | |
1949 | return -EFAULT; | |
1950 | ||
1951 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1952 | if (!sock) | |
1953 | goto out; | |
1954 | ||
1955 | err = -EMSGSIZE; | |
1956 | if (msg_sys.msg_iovlen > UIO_MAXIOV) | |
1957 | goto out_put; | |
1958 | ||
1959 | /* Check whether to allocate the iovec area */ | |
1960 | err = -ENOMEM; | |
1961 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); | |
1962 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { | |
1963 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); | |
1964 | if (!iov) | |
1965 | goto out_put; | |
1966 | } | |
1967 | ||
1968 | /* | |
1969 | * Save the user-mode address (verify_iovec will change the | |
1970 | * kernel msghdr to use the kernel address space) | |
1971 | */ | |
1972 | ||
1973 | uaddr = (__force void __user *)msg_sys.msg_name; | |
1974 | uaddr_len = COMPAT_NAMELEN(msg); | |
1975 | if (MSG_CMSG_COMPAT & flags) { | |
1976 | err = verify_compat_iovec(&msg_sys, iov, | |
1977 | (struct sockaddr *)&addr, | |
1978 | VERIFY_WRITE); | |
1979 | } else | |
1980 | err = verify_iovec(&msg_sys, iov, | |
1981 | (struct sockaddr *)&addr, | |
1982 | VERIFY_WRITE); | |
1983 | if (err < 0) | |
1984 | goto out_freeiov; | |
1985 | total_len = err; | |
1986 | ||
1987 | cmsg_ptr = (unsigned long)msg_sys.msg_control; | |
1988 | msg_sys.msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
1989 | ||
1990 | if (sock->file->f_flags & O_NONBLOCK) | |
1991 | flags |= MSG_DONTWAIT; | |
1992 | err = sock_recvmsg(sock, &msg_sys, total_len, flags); | |
1993 | if (err < 0) | |
1994 | goto out_freeiov; | |
1995 | len = err; | |
1996 | ||
1997 | if (uaddr != NULL) { | |
1998 | err = move_addr_to_user((struct sockaddr *)&addr, | |
1999 | msg_sys.msg_namelen, uaddr, | |
2000 | uaddr_len); | |
2001 | if (err < 0) | |
2002 | goto out_freeiov; | |
2003 | } | |
2004 | err = __put_user((msg_sys.msg_flags & ~MSG_CMSG_COMPAT), | |
2005 | COMPAT_FLAGS(msg)); | |
2006 | if (err) | |
2007 | goto out_freeiov; | |
2008 | if (MSG_CMSG_COMPAT & flags) | |
2009 | err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr, | |
2010 | &msg_compat->msg_controllen); | |
2011 | else | |
2012 | err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr, | |
2013 | &msg->msg_controllen); | |
2014 | if (err) | |
2015 | goto out_freeiov; | |
2016 | err = len; | |
2017 | ||
2018 | out_freeiov: | |
2019 | if (iov != iovstack) | |
2020 | sock_kfree_s(sock->sk, iov, iov_size); | |
2021 | out_put: | |
2022 | fput_light(sock->file, fput_needed); | |
2023 | out: | |
2024 | return err; | |
2025 | } | |
2026 | ||
2027 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
2028 | ||
2029 | /* Argument list sizes for sys_socketcall */ | |
2030 | #define AL(x) ((x) * sizeof(unsigned long)) | |
2031 | static const unsigned char nargs[19]={ | |
2032 | AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), | |
2033 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), | |
2034 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), | |
2035 | AL(4) | |
2036 | }; | |
2037 | ||
2038 | #undef AL | |
2039 | ||
2040 | /* | |
2041 | * System call vectors. | |
2042 | * | |
2043 | * Argument checking cleaned up. Saved 20% in size. | |
2044 | * This function doesn't need to set the kernel lock because | |
2045 | * it is set by the callees. | |
2046 | */ | |
2047 | ||
2048 | asmlinkage long sys_socketcall(int call, unsigned long __user *args) | |
2049 | { | |
2050 | unsigned long a[6]; | |
2051 | unsigned long a0, a1; | |
2052 | int err; | |
2053 | ||
2054 | if (call < 1 || call > SYS_ACCEPT4) | |
2055 | return -EINVAL; | |
2056 | ||
2057 | /* copy_from_user should be SMP safe. */ | |
2058 | if (copy_from_user(a, args, nargs[call])) | |
2059 | return -EFAULT; | |
2060 | ||
2061 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); | |
2062 | ||
2063 | a0 = a[0]; | |
2064 | a1 = a[1]; | |
2065 | ||
2066 | switch (call) { | |
2067 | case SYS_SOCKET: | |
2068 | err = sys_socket(a0, a1, a[2]); | |
2069 | break; | |
2070 | case SYS_BIND: | |
2071 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2072 | break; | |
2073 | case SYS_CONNECT: | |
2074 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2075 | break; | |
2076 | case SYS_LISTEN: | |
2077 | err = sys_listen(a0, a1); | |
2078 | break; | |
2079 | case SYS_ACCEPT: | |
2080 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2081 | (int __user *)a[2], 0); | |
2082 | break; | |
2083 | case SYS_GETSOCKNAME: | |
2084 | err = | |
2085 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2086 | (int __user *)a[2]); | |
2087 | break; | |
2088 | case SYS_GETPEERNAME: | |
2089 | err = | |
2090 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2091 | (int __user *)a[2]); | |
2092 | break; | |
2093 | case SYS_SOCKETPAIR: | |
2094 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2095 | break; | |
2096 | case SYS_SEND: | |
2097 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2098 | break; | |
2099 | case SYS_SENDTO: | |
2100 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2101 | (struct sockaddr __user *)a[4], a[5]); | |
2102 | break; | |
2103 | case SYS_RECV: | |
2104 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2105 | break; | |
2106 | case SYS_RECVFROM: | |
2107 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2108 | (struct sockaddr __user *)a[4], | |
2109 | (int __user *)a[5]); | |
2110 | break; | |
2111 | case SYS_SHUTDOWN: | |
2112 | err = sys_shutdown(a0, a1); | |
2113 | break; | |
2114 | case SYS_SETSOCKOPT: | |
2115 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2116 | break; | |
2117 | case SYS_GETSOCKOPT: | |
2118 | err = | |
2119 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2120 | (int __user *)a[4]); | |
2121 | break; | |
2122 | case SYS_SENDMSG: | |
2123 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2124 | break; | |
2125 | case SYS_RECVMSG: | |
2126 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2127 | break; | |
2128 | case SYS_ACCEPT4: | |
2129 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2130 | (int __user *)a[2], a[3]); | |
2131 | break; | |
2132 | default: | |
2133 | err = -EINVAL; | |
2134 | break; | |
2135 | } | |
2136 | return err; | |
2137 | } | |
2138 | ||
2139 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ | |
2140 | ||
2141 | /** | |
2142 | * sock_register - add a socket protocol handler | |
2143 | * @ops: description of protocol | |
2144 | * | |
2145 | * This function is called by a protocol handler that wants to | |
2146 | * advertise its address family, and have it linked into the | |
2147 | * socket interface. The value ops->family coresponds to the | |
2148 | * socket system call protocol family. | |
2149 | */ | |
2150 | int sock_register(const struct net_proto_family *ops) | |
2151 | { | |
2152 | int err; | |
2153 | ||
2154 | if (ops->family >= NPROTO) { | |
2155 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, | |
2156 | NPROTO); | |
2157 | return -ENOBUFS; | |
2158 | } | |
2159 | ||
2160 | spin_lock(&net_family_lock); | |
2161 | if (net_families[ops->family]) | |
2162 | err = -EEXIST; | |
2163 | else { | |
2164 | net_families[ops->family] = ops; | |
2165 | err = 0; | |
2166 | } | |
2167 | spin_unlock(&net_family_lock); | |
2168 | ||
2169 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); | |
2170 | return err; | |
2171 | } | |
2172 | ||
2173 | /** | |
2174 | * sock_unregister - remove a protocol handler | |
2175 | * @family: protocol family to remove | |
2176 | * | |
2177 | * This function is called by a protocol handler that wants to | |
2178 | * remove its address family, and have it unlinked from the | |
2179 | * new socket creation. | |
2180 | * | |
2181 | * If protocol handler is a module, then it can use module reference | |
2182 | * counts to protect against new references. If protocol handler is not | |
2183 | * a module then it needs to provide its own protection in | |
2184 | * the ops->create routine. | |
2185 | */ | |
2186 | void sock_unregister(int family) | |
2187 | { | |
2188 | BUG_ON(family < 0 || family >= NPROTO); | |
2189 | ||
2190 | spin_lock(&net_family_lock); | |
2191 | net_families[family] = NULL; | |
2192 | spin_unlock(&net_family_lock); | |
2193 | ||
2194 | synchronize_rcu(); | |
2195 | ||
2196 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); | |
2197 | } | |
2198 | ||
2199 | static int __init sock_init(void) | |
2200 | { | |
2201 | /* | |
2202 | * Initialize sock SLAB cache. | |
2203 | */ | |
2204 | ||
2205 | sk_init(); | |
2206 | ||
2207 | /* | |
2208 | * Initialize skbuff SLAB cache | |
2209 | */ | |
2210 | skb_init(); | |
2211 | ||
2212 | /* | |
2213 | * Initialize the protocols module. | |
2214 | */ | |
2215 | ||
2216 | init_inodecache(); | |
2217 | register_filesystem(&sock_fs_type); | |
2218 | sock_mnt = kern_mount(&sock_fs_type); | |
2219 | ||
2220 | /* The real protocol initialization is performed in later initcalls. | |
2221 | */ | |
2222 | ||
2223 | #ifdef CONFIG_NETFILTER | |
2224 | netfilter_init(); | |
2225 | #endif | |
2226 | ||
2227 | return 0; | |
2228 | } | |
2229 | ||
2230 | core_initcall(sock_init); /* early initcall */ | |
2231 | ||
2232 | #ifdef CONFIG_PROC_FS | |
2233 | void socket_seq_show(struct seq_file *seq) | |
2234 | { | |
2235 | int cpu; | |
2236 | int counter = 0; | |
2237 | ||
2238 | for_each_possible_cpu(cpu) | |
2239 | counter += per_cpu(sockets_in_use, cpu); | |
2240 | ||
2241 | /* It can be negative, by the way. 8) */ | |
2242 | if (counter < 0) | |
2243 | counter = 0; | |
2244 | ||
2245 | seq_printf(seq, "sockets: used %d\n", counter); | |
2246 | } | |
2247 | #endif /* CONFIG_PROC_FS */ | |
2248 | ||
2249 | #ifdef CONFIG_COMPAT | |
2250 | static long compat_sock_ioctl(struct file *file, unsigned cmd, | |
2251 | unsigned long arg) | |
2252 | { | |
2253 | struct socket *sock = file->private_data; | |
2254 | int ret = -ENOIOCTLCMD; | |
2255 | struct sock *sk; | |
2256 | struct net *net; | |
2257 | ||
2258 | sk = sock->sk; | |
2259 | net = sock_net(sk); | |
2260 | ||
2261 | if (sock->ops->compat_ioctl) | |
2262 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
2263 | ||
2264 | if (ret == -ENOIOCTLCMD && | |
2265 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
2266 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
2267 | ||
2268 | return ret; | |
2269 | } | |
2270 | #endif | |
2271 | ||
2272 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) | |
2273 | { | |
2274 | return sock->ops->bind(sock, addr, addrlen); | |
2275 | } | |
2276 | ||
2277 | int kernel_listen(struct socket *sock, int backlog) | |
2278 | { | |
2279 | return sock->ops->listen(sock, backlog); | |
2280 | } | |
2281 | ||
2282 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
2283 | { | |
2284 | struct sock *sk = sock->sk; | |
2285 | int err; | |
2286 | ||
2287 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
2288 | newsock); | |
2289 | if (err < 0) | |
2290 | goto done; | |
2291 | ||
2292 | err = sock->ops->accept(sock, *newsock, flags); | |
2293 | if (err < 0) { | |
2294 | sock_release(*newsock); | |
2295 | *newsock = NULL; | |
2296 | goto done; | |
2297 | } | |
2298 | ||
2299 | (*newsock)->ops = sock->ops; | |
2300 | __module_get((*newsock)->ops->owner); | |
2301 | ||
2302 | done: | |
2303 | return err; | |
2304 | } | |
2305 | ||
2306 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
2307 | int flags) | |
2308 | { | |
2309 | return sock->ops->connect(sock, addr, addrlen, flags); | |
2310 | } | |
2311 | ||
2312 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
2313 | int *addrlen) | |
2314 | { | |
2315 | return sock->ops->getname(sock, addr, addrlen, 0); | |
2316 | } | |
2317 | ||
2318 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
2319 | int *addrlen) | |
2320 | { | |
2321 | return sock->ops->getname(sock, addr, addrlen, 1); | |
2322 | } | |
2323 | ||
2324 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
2325 | char *optval, int *optlen) | |
2326 | { | |
2327 | mm_segment_t oldfs = get_fs(); | |
2328 | int err; | |
2329 | ||
2330 | set_fs(KERNEL_DS); | |
2331 | if (level == SOL_SOCKET) | |
2332 | err = sock_getsockopt(sock, level, optname, optval, optlen); | |
2333 | else | |
2334 | err = sock->ops->getsockopt(sock, level, optname, optval, | |
2335 | optlen); | |
2336 | set_fs(oldfs); | |
2337 | return err; | |
2338 | } | |
2339 | ||
2340 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
2341 | char *optval, int optlen) | |
2342 | { | |
2343 | mm_segment_t oldfs = get_fs(); | |
2344 | int err; | |
2345 | ||
2346 | set_fs(KERNEL_DS); | |
2347 | if (level == SOL_SOCKET) | |
2348 | err = sock_setsockopt(sock, level, optname, optval, optlen); | |
2349 | else | |
2350 | err = sock->ops->setsockopt(sock, level, optname, optval, | |
2351 | optlen); | |
2352 | set_fs(oldfs); | |
2353 | return err; | |
2354 | } | |
2355 | ||
2356 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
2357 | size_t size, int flags) | |
2358 | { | |
2359 | if (sock->ops->sendpage) | |
2360 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
2361 | ||
2362 | return sock_no_sendpage(sock, page, offset, size, flags); | |
2363 | } | |
2364 | ||
2365 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
2366 | { | |
2367 | mm_segment_t oldfs = get_fs(); | |
2368 | int err; | |
2369 | ||
2370 | set_fs(KERNEL_DS); | |
2371 | err = sock->ops->ioctl(sock, cmd, arg); | |
2372 | set_fs(oldfs); | |
2373 | ||
2374 | return err; | |
2375 | } | |
2376 | ||
2377 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) | |
2378 | { | |
2379 | return sock->ops->shutdown(sock, how); | |
2380 | } | |
2381 | ||
2382 | EXPORT_SYMBOL(sock_create); | |
2383 | EXPORT_SYMBOL(sock_create_kern); | |
2384 | EXPORT_SYMBOL(sock_create_lite); | |
2385 | EXPORT_SYMBOL(sock_map_fd); | |
2386 | EXPORT_SYMBOL(sock_recvmsg); | |
2387 | EXPORT_SYMBOL(sock_register); | |
2388 | EXPORT_SYMBOL(sock_release); | |
2389 | EXPORT_SYMBOL(sock_sendmsg); | |
2390 | EXPORT_SYMBOL(sock_unregister); | |
2391 | EXPORT_SYMBOL(sock_wake_async); | |
2392 | EXPORT_SYMBOL(sockfd_lookup); | |
2393 | EXPORT_SYMBOL(kernel_sendmsg); | |
2394 | EXPORT_SYMBOL(kernel_recvmsg); | |
2395 | EXPORT_SYMBOL(kernel_bind); | |
2396 | EXPORT_SYMBOL(kernel_listen); | |
2397 | EXPORT_SYMBOL(kernel_accept); | |
2398 | EXPORT_SYMBOL(kernel_connect); | |
2399 | EXPORT_SYMBOL(kernel_getsockname); | |
2400 | EXPORT_SYMBOL(kernel_getpeername); | |
2401 | EXPORT_SYMBOL(kernel_getsockopt); | |
2402 | EXPORT_SYMBOL(kernel_setsockopt); | |
2403 | EXPORT_SYMBOL(kernel_sendpage); | |
2404 | EXPORT_SYMBOL(kernel_sock_ioctl); | |
2405 | EXPORT_SYMBOL(kernel_sock_shutdown); |