switch hostfs
[linux-2.6-block.git] / net / socket.c
CommitLineData
1da177e4
LT
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>
02c30a84 7 * Ross Biro
1da177e4
LT
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)
89bddce5 45 * Tigran Aivazian : Made listen(2) backlog sanity checks
1da177e4
LT
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
89bddce5 56 * paradigm.
1da177e4
LT
57 *
58 * Based upon Swansea University Computer Society NET3.039
59 */
60
1da177e4 61#include <linux/mm.h>
1da177e4
LT
62#include <linux/socket.h>
63#include <linux/file.h>
64#include <linux/net.h>
65#include <linux/interrupt.h>
aaca0bdc 66#include <linux/thread_info.h>
55737fda 67#include <linux/rcupdate.h>
1da177e4
LT
68#include <linux/netdevice.h>
69#include <linux/proc_fs.h>
70#include <linux/seq_file.h>
4a3e2f71 71#include <linux/mutex.h>
1da177e4
LT
72#include <linux/wanrouter.h>
73#include <linux/if_bridge.h>
20380731
ACM
74#include <linux/if_frad.h>
75#include <linux/if_vlan.h>
1da177e4
LT
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>
1da177e4
LT
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>
3ec3b2fb 86#include <linux/audit.h>
d86b5e0e 87#include <linux/wireless.h>
1b8d7ae4 88#include <linux/nsproxy.h>
1fd7317d 89#include <linux/magic.h>
5a0e3ad6 90#include <linux/slab.h>
1da177e4
LT
91
92#include <asm/uaccess.h>
93#include <asm/unistd.h>
94
95#include <net/compat.h>
87de87d5 96#include <net/wext.h>
f8451725 97#include <net/cls_cgroup.h>
1da177e4
LT
98
99#include <net/sock.h>
100#include <linux/netfilter.h>
101
6b96018b
AB
102#include <linux/if_tun.h>
103#include <linux/ipv6_route.h>
104#include <linux/route.h>
6b96018b
AB
105#include <linux/sockios.h>
106#include <linux/atalk.h>
107
1da177e4 108static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
027445c3
BP
109static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
110 unsigned long nr_segs, loff_t pos);
111static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
112 unsigned long nr_segs, loff_t pos);
89bddce5 113static int sock_mmap(struct file *file, struct vm_area_struct *vma);
1da177e4
LT
114
115static int sock_close(struct inode *inode, struct file *file);
116static unsigned int sock_poll(struct file *file,
117 struct poll_table_struct *wait);
89bddce5 118static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
89bbfc95
SP
119#ifdef CONFIG_COMPAT
120static long compat_sock_ioctl(struct file *file,
89bddce5 121 unsigned int cmd, unsigned long arg);
89bbfc95 122#endif
1da177e4 123static int sock_fasync(int fd, struct file *filp, int on);
1da177e4
LT
124static ssize_t sock_sendpage(struct file *file, struct page *page,
125 int offset, size_t size, loff_t *ppos, int more);
9c55e01c 126static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
c6d409cf 127 struct pipe_inode_info *pipe, size_t len,
9c55e01c 128 unsigned int flags);
1da177e4 129
1da177e4
LT
130/*
131 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
132 * in the operation structures but are done directly via the socketcall() multiplexor.
133 */
134
da7071d7 135static const struct file_operations socket_file_ops = {
1da177e4
LT
136 .owner = THIS_MODULE,
137 .llseek = no_llseek,
138 .aio_read = sock_aio_read,
139 .aio_write = sock_aio_write,
140 .poll = sock_poll,
141 .unlocked_ioctl = sock_ioctl,
89bbfc95
SP
142#ifdef CONFIG_COMPAT
143 .compat_ioctl = compat_sock_ioctl,
144#endif
1da177e4
LT
145 .mmap = sock_mmap,
146 .open = sock_no_open, /* special open code to disallow open via /proc */
147 .release = sock_close,
148 .fasync = sock_fasync,
5274f052
JA
149 .sendpage = sock_sendpage,
150 .splice_write = generic_splice_sendpage,
9c55e01c 151 .splice_read = sock_splice_read,
1da177e4
LT
152};
153
154/*
155 * The protocol list. Each protocol is registered in here.
156 */
157
1da177e4 158static DEFINE_SPINLOCK(net_family_lock);
190683a9 159static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly;
1da177e4 160
1da177e4
LT
161/*
162 * Statistics counters of the socket lists
163 */
164
c6d409cf 165static DEFINE_PER_CPU(int, sockets_in_use);
1da177e4
LT
166
167/*
89bddce5
SH
168 * Support routines.
169 * Move socket addresses back and forth across the kernel/user
170 * divide and look after the messy bits.
1da177e4
LT
171 */
172
1da177e4
LT
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
230b1839 184int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr)
1da177e4 185{
230b1839 186 if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))
1da177e4 187 return -EINVAL;
89bddce5 188 if (ulen == 0)
1da177e4 189 return 0;
89bddce5 190 if (copy_from_user(kaddr, uaddr, ulen))
1da177e4 191 return -EFAULT;
3ec3b2fb 192 return audit_sockaddr(ulen, kaddr);
1da177e4
LT
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 */
89bddce5 211
11165f14 212static int move_addr_to_user(struct sockaddr *kaddr, int klen,
213 void __user *uaddr, int __user *ulen)
1da177e4
LT
214{
215 int err;
216 int len;
217
89bddce5
SH
218 err = get_user(len, ulen);
219 if (err)
1da177e4 220 return err;
89bddce5
SH
221 if (len > klen)
222 len = klen;
230b1839 223 if (len < 0 || len > sizeof(struct sockaddr_storage))
1da177e4 224 return -EINVAL;
89bddce5 225 if (len) {
d6fe3945
SG
226 if (audit_sockaddr(klen, kaddr))
227 return -ENOMEM;
89bddce5 228 if (copy_to_user(uaddr, kaddr, len))
1da177e4
LT
229 return -EFAULT;
230 }
231 /*
89bddce5
SH
232 * "fromlen shall refer to the value before truncation.."
233 * 1003.1g
1da177e4
LT
234 */
235 return __put_user(klen, ulen);
236}
237
e18b890b 238static struct kmem_cache *sock_inode_cachep __read_mostly;
1da177e4
LT
239
240static struct inode *sock_alloc_inode(struct super_block *sb)
241{
242 struct socket_alloc *ei;
89bddce5 243
e94b1766 244 ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
1da177e4
LT
245 if (!ei)
246 return NULL;
43815482
ED
247 ei->socket.wq = kmalloc(sizeof(struct socket_wq), GFP_KERNEL);
248 if (!ei->socket.wq) {
249 kmem_cache_free(sock_inode_cachep, ei);
250 return NULL;
251 }
252 init_waitqueue_head(&ei->socket.wq->wait);
253 ei->socket.wq->fasync_list = NULL;
89bddce5 254
1da177e4
LT
255 ei->socket.state = SS_UNCONNECTED;
256 ei->socket.flags = 0;
257 ei->socket.ops = NULL;
258 ei->socket.sk = NULL;
259 ei->socket.file = NULL;
1da177e4
LT
260
261 return &ei->vfs_inode;
262}
263
43815482 264
ff0c7d15 265
43815482
ED
266static void wq_free_rcu(struct rcu_head *head)
267{
268 struct socket_wq *wq = container_of(head, struct socket_wq, rcu);
269
270 kfree(wq);
271}
272
1da177e4
LT
273static void sock_destroy_inode(struct inode *inode)
274{
43815482
ED
275 struct socket_alloc *ei;
276
277 ei = container_of(inode, struct socket_alloc, vfs_inode);
278 call_rcu(&ei->socket.wq->rcu, wq_free_rcu);
279 kmem_cache_free(sock_inode_cachep, ei);
1da177e4
LT
280}
281
51cc5068 282static void init_once(void *foo)
1da177e4 283{
89bddce5 284 struct socket_alloc *ei = (struct socket_alloc *)foo;
1da177e4 285
a35afb83 286 inode_init_once(&ei->vfs_inode);
1da177e4 287}
89bddce5 288
1da177e4
LT
289static int init_inodecache(void)
290{
291 sock_inode_cachep = kmem_cache_create("sock_inode_cache",
89bddce5
SH
292 sizeof(struct socket_alloc),
293 0,
294 (SLAB_HWCACHE_ALIGN |
295 SLAB_RECLAIM_ACCOUNT |
296 SLAB_MEM_SPREAD),
20c2df83 297 init_once);
1da177e4
LT
298 if (sock_inode_cachep == NULL)
299 return -ENOMEM;
300 return 0;
301}
302
b87221de 303static const struct super_operations sockfs_ops = {
c6d409cf
ED
304 .alloc_inode = sock_alloc_inode,
305 .destroy_inode = sock_destroy_inode,
306 .statfs = simple_statfs,
1da177e4
LT
307};
308
51139ada
AV
309static struct dentry *sockfs_mount(struct file_system_type *fs_type,
310 int flags, const char *dev_name, void *data)
1da177e4 311{
51139ada 312 return mount_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC);
1da177e4
LT
313}
314
ba89966c 315static struct vfsmount *sock_mnt __read_mostly;
1da177e4
LT
316
317static struct file_system_type sock_fs_type = {
318 .name = "sockfs",
51139ada 319 .mount = sockfs_mount,
1da177e4
LT
320 .kill_sb = kill_anon_super,
321};
89bddce5 322
c23fbb6b
ED
323/*
324 * sockfs_dname() is called from d_path().
325 */
326static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen)
327{
328 return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]",
329 dentry->d_inode->i_ino);
330}
331
3ba13d17 332static const struct dentry_operations sockfs_dentry_operations = {
c23fbb6b 333 .d_dname = sockfs_dname,
1da177e4
LT
334};
335
336/*
337 * Obtains the first available file descriptor and sets it up for use.
338 *
39d8c1b6
DM
339 * These functions create file structures and maps them to fd space
340 * of the current process. On success it returns file descriptor
1da177e4
LT
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
7cbe66b6 353static int sock_alloc_file(struct socket *sock, struct file **f, int flags)
1da177e4 354{
7cbe66b6 355 struct qstr name = { .name = "" };
2c48b9c4 356 struct path path;
7cbe66b6 357 struct file *file;
1da177e4 358 int fd;
1da177e4 359
a677a039 360 fd = get_unused_fd_flags(flags);
7cbe66b6
AV
361 if (unlikely(fd < 0))
362 return fd;
1da177e4 363
4b936885 364 path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name);
2c48b9c4 365 if (unlikely(!path.dentry)) {
7cbe66b6 366 put_unused_fd(fd);
39d8c1b6 367 return -ENOMEM;
7cbe66b6 368 }
2c48b9c4 369 path.mnt = mntget(sock_mnt);
39d8c1b6 370
fb045adb 371 d_set_d_op(path.dentry, &sockfs_dentry_operations);
2c48b9c4 372 d_instantiate(path.dentry, SOCK_INODE(sock));
cc3808f8 373 SOCK_INODE(sock)->i_fop = &socket_file_ops;
39d8c1b6 374
2c48b9c4 375 file = alloc_file(&path, FMODE_READ | FMODE_WRITE,
ce8d2cdf 376 &socket_file_ops);
cc3808f8
AV
377 if (unlikely(!file)) {
378 /* drop dentry, keep inode */
7de9c6ee 379 ihold(path.dentry->d_inode);
2c48b9c4 380 path_put(&path);
cc3808f8
AV
381 put_unused_fd(fd);
382 return -ENFILE;
383 }
384
385 sock->file = file;
77d27200 386 file->f_flags = O_RDWR | (flags & O_NONBLOCK);
39d8c1b6
DM
387 file->f_pos = 0;
388 file->private_data = sock;
1da177e4 389
7cbe66b6
AV
390 *f = file;
391 return fd;
39d8c1b6
DM
392}
393
a677a039 394int sock_map_fd(struct socket *sock, int flags)
39d8c1b6
DM
395{
396 struct file *newfile;
7cbe66b6 397 int fd = sock_alloc_file(sock, &newfile, flags);
39d8c1b6 398
7cbe66b6 399 if (likely(fd >= 0))
39d8c1b6 400 fd_install(fd, newfile);
7cbe66b6 401
1da177e4
LT
402 return fd;
403}
c6d409cf 404EXPORT_SYMBOL(sock_map_fd);
1da177e4 405
6cb153ca
BL
406static struct socket *sock_from_file(struct file *file, int *err)
407{
6cb153ca
BL
408 if (file->f_op == &socket_file_ops)
409 return file->private_data; /* set in sock_map_fd */
410
23bb80d2
ED
411 *err = -ENOTSOCK;
412 return NULL;
6cb153ca
BL
413}
414
1da177e4 415/**
c6d409cf 416 * sockfd_lookup - Go from a file number to its socket slot
1da177e4
LT
417 * @fd: file handle
418 * @err: pointer to an error code return
419 *
420 * The file handle passed in is locked and the socket it is bound
421 * too is returned. If an error occurs the err pointer is overwritten
422 * with a negative errno code and NULL is returned. The function checks
423 * for both invalid handles and passing a handle which is not a socket.
424 *
425 * On a success the socket object pointer is returned.
426 */
427
428struct socket *sockfd_lookup(int fd, int *err)
429{
430 struct file *file;
1da177e4
LT
431 struct socket *sock;
432
89bddce5
SH
433 file = fget(fd);
434 if (!file) {
1da177e4
LT
435 *err = -EBADF;
436 return NULL;
437 }
89bddce5 438
6cb153ca
BL
439 sock = sock_from_file(file, err);
440 if (!sock)
1da177e4 441 fput(file);
6cb153ca
BL
442 return sock;
443}
c6d409cf 444EXPORT_SYMBOL(sockfd_lookup);
1da177e4 445
6cb153ca
BL
446static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
447{
448 struct file *file;
449 struct socket *sock;
450
3672558c 451 *err = -EBADF;
6cb153ca
BL
452 file = fget_light(fd, fput_needed);
453 if (file) {
454 sock = sock_from_file(file, err);
455 if (sock)
456 return sock;
457 fput_light(file, *fput_needed);
1da177e4 458 }
6cb153ca 459 return NULL;
1da177e4
LT
460}
461
462/**
463 * sock_alloc - allocate a socket
89bddce5 464 *
1da177e4
LT
465 * Allocate a new inode and socket object. The two are bound together
466 * and initialised. The socket is then returned. If we are out of inodes
467 * NULL is returned.
468 */
469
470static struct socket *sock_alloc(void)
471{
89bddce5
SH
472 struct inode *inode;
473 struct socket *sock;
1da177e4
LT
474
475 inode = new_inode(sock_mnt->mnt_sb);
476 if (!inode)
477 return NULL;
478
479 sock = SOCKET_I(inode);
480
29a020d3 481 kmemcheck_annotate_bitfield(sock, type);
85fe4025 482 inode->i_ino = get_next_ino();
89bddce5 483 inode->i_mode = S_IFSOCK | S_IRWXUGO;
8192b0c4
DH
484 inode->i_uid = current_fsuid();
485 inode->i_gid = current_fsgid();
1da177e4 486
4e69489a 487 percpu_add(sockets_in_use, 1);
1da177e4
LT
488 return sock;
489}
490
491/*
492 * In theory you can't get an open on this inode, but /proc provides
493 * a back door. Remember to keep it shut otherwise you'll let the
494 * creepy crawlies in.
495 */
89bddce5 496
1da177e4
LT
497static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
498{
499 return -ENXIO;
500}
501
4b6f5d20 502const struct file_operations bad_sock_fops = {
1da177e4
LT
503 .owner = THIS_MODULE,
504 .open = sock_no_open,
6038f373 505 .llseek = noop_llseek,
1da177e4
LT
506};
507
508/**
509 * sock_release - close a socket
510 * @sock: socket to close
511 *
512 * The socket is released from the protocol stack if it has a release
513 * callback, and the inode is then released if the socket is bound to
89bddce5 514 * an inode not a file.
1da177e4 515 */
89bddce5 516
1da177e4
LT
517void sock_release(struct socket *sock)
518{
519 if (sock->ops) {
520 struct module *owner = sock->ops->owner;
521
522 sock->ops->release(sock);
523 sock->ops = NULL;
524 module_put(owner);
525 }
526
43815482 527 if (sock->wq->fasync_list)
1da177e4
LT
528 printk(KERN_ERR "sock_release: fasync list not empty!\n");
529
4e69489a 530 percpu_sub(sockets_in_use, 1);
1da177e4
LT
531 if (!sock->file) {
532 iput(SOCK_INODE(sock));
533 return;
534 }
89bddce5 535 sock->file = NULL;
1da177e4 536}
c6d409cf 537EXPORT_SYMBOL(sock_release);
1da177e4 538
2244d07b 539int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags)
20d49473 540{
2244d07b 541 *tx_flags = 0;
20d49473 542 if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE))
2244d07b 543 *tx_flags |= SKBTX_HW_TSTAMP;
20d49473 544 if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE))
2244d07b 545 *tx_flags |= SKBTX_SW_TSTAMP;
20d49473
PO
546 return 0;
547}
548EXPORT_SYMBOL(sock_tx_timestamp);
549
89bddce5 550static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
1da177e4
LT
551 struct msghdr *msg, size_t size)
552{
553 struct sock_iocb *si = kiocb_to_siocb(iocb);
554 int err;
555
f8451725
HX
556 sock_update_classid(sock->sk);
557
1da177e4
LT
558 si->sock = sock;
559 si->scm = NULL;
560 si->msg = msg;
561 si->size = size;
562
563 err = security_socket_sendmsg(sock, msg, size);
564 if (err)
565 return err;
566
567 return sock->ops->sendmsg(iocb, sock, msg, size);
568}
569
570int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
571{
572 struct kiocb iocb;
573 struct sock_iocb siocb;
574 int ret;
575
576 init_sync_kiocb(&iocb, NULL);
577 iocb.private = &siocb;
578 ret = __sock_sendmsg(&iocb, sock, msg, size);
579 if (-EIOCBQUEUED == ret)
580 ret = wait_on_sync_kiocb(&iocb);
581 return ret;
582}
c6d409cf 583EXPORT_SYMBOL(sock_sendmsg);
1da177e4
LT
584
585int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
586 struct kvec *vec, size_t num, size_t size)
587{
588 mm_segment_t oldfs = get_fs();
589 int result;
590
591 set_fs(KERNEL_DS);
592 /*
593 * the following is safe, since for compiler definitions of kvec and
594 * iovec are identical, yielding the same in-core layout and alignment
595 */
89bddce5 596 msg->msg_iov = (struct iovec *)vec;
1da177e4
LT
597 msg->msg_iovlen = num;
598 result = sock_sendmsg(sock, msg, size);
599 set_fs(oldfs);
600 return result;
601}
c6d409cf 602EXPORT_SYMBOL(kernel_sendmsg);
1da177e4 603
20d49473
PO
604static int ktime2ts(ktime_t kt, struct timespec *ts)
605{
606 if (kt.tv64) {
607 *ts = ktime_to_timespec(kt);
608 return 1;
609 } else {
610 return 0;
611 }
612}
613
92f37fd2
ED
614/*
615 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
616 */
617void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
618 struct sk_buff *skb)
619{
20d49473
PO
620 int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP);
621 struct timespec ts[3];
622 int empty = 1;
623 struct skb_shared_hwtstamps *shhwtstamps =
624 skb_hwtstamps(skb);
625
626 /* Race occurred between timestamp enabling and packet
627 receiving. Fill in the current time for now. */
628 if (need_software_tstamp && skb->tstamp.tv64 == 0)
629 __net_timestamp(skb);
630
631 if (need_software_tstamp) {
632 if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
633 struct timeval tv;
634 skb_get_timestamp(skb, &tv);
635 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
636 sizeof(tv), &tv);
637 } else {
842509b8 638 skb_get_timestampns(skb, &ts[0]);
20d49473 639 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS,
842509b8 640 sizeof(ts[0]), &ts[0]);
20d49473
PO
641 }
642 }
643
644
645 memset(ts, 0, sizeof(ts));
646 if (skb->tstamp.tv64 &&
647 sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) {
648 skb_get_timestampns(skb, ts + 0);
649 empty = 0;
650 }
651 if (shhwtstamps) {
652 if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) &&
653 ktime2ts(shhwtstamps->syststamp, ts + 1))
654 empty = 0;
655 if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) &&
656 ktime2ts(shhwtstamps->hwtstamp, ts + 2))
657 empty = 0;
92f37fd2 658 }
20d49473
PO
659 if (!empty)
660 put_cmsg(msg, SOL_SOCKET,
661 SCM_TIMESTAMPING, sizeof(ts), &ts);
92f37fd2 662}
7c81fd8b
ACM
663EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
664
11165f14 665static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk,
666 struct sk_buff *skb)
3b885787
NH
667{
668 if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount)
669 put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL,
670 sizeof(__u32), &skb->dropcount);
671}
672
767dd033 673void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
3b885787
NH
674 struct sk_buff *skb)
675{
676 sock_recv_timestamp(msg, sk, skb);
677 sock_recv_drops(msg, sk, skb);
678}
767dd033 679EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
3b885787 680
a2e27255
ACM
681static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock,
682 struct msghdr *msg, size_t size, int flags)
1da177e4 683{
1da177e4
LT
684 struct sock_iocb *si = kiocb_to_siocb(iocb);
685
f8451725
HX
686 sock_update_classid(sock->sk);
687
1da177e4
LT
688 si->sock = sock;
689 si->scm = NULL;
690 si->msg = msg;
691 si->size = size;
692 si->flags = flags;
693
1da177e4
LT
694 return sock->ops->recvmsg(iocb, sock, msg, size, flags);
695}
696
a2e27255
ACM
697static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
698 struct msghdr *msg, size_t size, int flags)
699{
700 int err = security_socket_recvmsg(sock, msg, size, flags);
701
702 return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags);
703}
704
89bddce5 705int sock_recvmsg(struct socket *sock, struct msghdr *msg,
1da177e4
LT
706 size_t size, int flags)
707{
708 struct kiocb iocb;
709 struct sock_iocb siocb;
710 int ret;
711
89bddce5 712 init_sync_kiocb(&iocb, NULL);
1da177e4
LT
713 iocb.private = &siocb;
714 ret = __sock_recvmsg(&iocb, sock, msg, size, flags);
715 if (-EIOCBQUEUED == ret)
716 ret = wait_on_sync_kiocb(&iocb);
717 return ret;
718}
c6d409cf 719EXPORT_SYMBOL(sock_recvmsg);
1da177e4 720
a2e27255
ACM
721static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
722 size_t size, int flags)
723{
724 struct kiocb iocb;
725 struct sock_iocb siocb;
726 int ret;
727
728 init_sync_kiocb(&iocb, NULL);
729 iocb.private = &siocb;
730 ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags);
731 if (-EIOCBQUEUED == ret)
732 ret = wait_on_sync_kiocb(&iocb);
733 return ret;
734}
735
c1249c0a
ML
736/**
737 * kernel_recvmsg - Receive a message from a socket (kernel space)
738 * @sock: The socket to receive the message from
739 * @msg: Received message
740 * @vec: Input s/g array for message data
741 * @num: Size of input s/g array
742 * @size: Number of bytes to read
743 * @flags: Message flags (MSG_DONTWAIT, etc...)
744 *
745 * On return the msg structure contains the scatter/gather array passed in the
746 * vec argument. The array is modified so that it consists of the unfilled
747 * portion of the original array.
748 *
749 * The returned value is the total number of bytes received, or an error.
750 */
89bddce5
SH
751int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
752 struct kvec *vec, size_t num, size_t size, int flags)
1da177e4
LT
753{
754 mm_segment_t oldfs = get_fs();
755 int result;
756
757 set_fs(KERNEL_DS);
758 /*
759 * the following is safe, since for compiler definitions of kvec and
760 * iovec are identical, yielding the same in-core layout and alignment
761 */
89bddce5 762 msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num;
1da177e4
LT
763 result = sock_recvmsg(sock, msg, size, flags);
764 set_fs(oldfs);
765 return result;
766}
c6d409cf 767EXPORT_SYMBOL(kernel_recvmsg);
1da177e4
LT
768
769static void sock_aio_dtor(struct kiocb *iocb)
770{
771 kfree(iocb->private);
772}
773
ce1d4d3e
CH
774static ssize_t sock_sendpage(struct file *file, struct page *page,
775 int offset, size_t size, loff_t *ppos, int more)
1da177e4 776{
1da177e4
LT
777 struct socket *sock;
778 int flags;
779
ce1d4d3e
CH
780 sock = file->private_data;
781
782 flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
783 if (more)
784 flags |= MSG_MORE;
785
e6949583 786 return kernel_sendpage(sock, page, offset, size, flags);
ce1d4d3e 787}
1da177e4 788
9c55e01c 789static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
c6d409cf 790 struct pipe_inode_info *pipe, size_t len,
9c55e01c
JA
791 unsigned int flags)
792{
793 struct socket *sock = file->private_data;
794
997b37da
RDC
795 if (unlikely(!sock->ops->splice_read))
796 return -EINVAL;
797
f8451725
HX
798 sock_update_classid(sock->sk);
799
9c55e01c
JA
800 return sock->ops->splice_read(sock, ppos, pipe, len, flags);
801}
802
ce1d4d3e 803static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
89bddce5 804 struct sock_iocb *siocb)
ce1d4d3e
CH
805{
806 if (!is_sync_kiocb(iocb)) {
807 siocb = kmalloc(sizeof(*siocb), GFP_KERNEL);
808 if (!siocb)
809 return NULL;
1da177e4
LT
810 iocb->ki_dtor = sock_aio_dtor;
811 }
1da177e4 812
ce1d4d3e 813 siocb->kiocb = iocb;
ce1d4d3e
CH
814 iocb->private = siocb;
815 return siocb;
1da177e4
LT
816}
817
ce1d4d3e 818static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb,
027445c3
BP
819 struct file *file, const struct iovec *iov,
820 unsigned long nr_segs)
ce1d4d3e
CH
821{
822 struct socket *sock = file->private_data;
823 size_t size = 0;
824 int i;
1da177e4 825
89bddce5
SH
826 for (i = 0; i < nr_segs; i++)
827 size += iov[i].iov_len;
1da177e4 828
ce1d4d3e
CH
829 msg->msg_name = NULL;
830 msg->msg_namelen = 0;
831 msg->msg_control = NULL;
832 msg->msg_controllen = 0;
89bddce5 833 msg->msg_iov = (struct iovec *)iov;
ce1d4d3e
CH
834 msg->msg_iovlen = nr_segs;
835 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
836
837 return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags);
838}
839
027445c3
BP
840static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
841 unsigned long nr_segs, loff_t pos)
ce1d4d3e
CH
842{
843 struct sock_iocb siocb, *x;
844
1da177e4
LT
845 if (pos != 0)
846 return -ESPIPE;
027445c3
BP
847
848 if (iocb->ki_left == 0) /* Match SYS5 behaviour */
1da177e4
LT
849 return 0;
850
027445c3
BP
851
852 x = alloc_sock_iocb(iocb, &siocb);
ce1d4d3e
CH
853 if (!x)
854 return -ENOMEM;
027445c3 855 return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
1da177e4
LT
856}
857
ce1d4d3e 858static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb,
027445c3
BP
859 struct file *file, const struct iovec *iov,
860 unsigned long nr_segs)
1da177e4 861{
ce1d4d3e
CH
862 struct socket *sock = file->private_data;
863 size_t size = 0;
864 int i;
1da177e4 865
89bddce5
SH
866 for (i = 0; i < nr_segs; i++)
867 size += iov[i].iov_len;
1da177e4 868
ce1d4d3e
CH
869 msg->msg_name = NULL;
870 msg->msg_namelen = 0;
871 msg->msg_control = NULL;
872 msg->msg_controllen = 0;
89bddce5 873 msg->msg_iov = (struct iovec *)iov;
ce1d4d3e
CH
874 msg->msg_iovlen = nr_segs;
875 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
876 if (sock->type == SOCK_SEQPACKET)
877 msg->msg_flags |= MSG_EOR;
1da177e4 878
ce1d4d3e 879 return __sock_sendmsg(iocb, sock, msg, size);
1da177e4
LT
880}
881
027445c3
BP
882static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
883 unsigned long nr_segs, loff_t pos)
ce1d4d3e
CH
884{
885 struct sock_iocb siocb, *x;
1da177e4 886
ce1d4d3e
CH
887 if (pos != 0)
888 return -ESPIPE;
027445c3 889
027445c3 890 x = alloc_sock_iocb(iocb, &siocb);
ce1d4d3e
CH
891 if (!x)
892 return -ENOMEM;
1da177e4 893
027445c3 894 return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
1da177e4
LT
895}
896
1da177e4
LT
897/*
898 * Atomic setting of ioctl hooks to avoid race
899 * with module unload.
900 */
901
4a3e2f71 902static DEFINE_MUTEX(br_ioctl_mutex);
c6d409cf 903static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg);
1da177e4 904
881d966b 905void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *))
1da177e4 906{
4a3e2f71 907 mutex_lock(&br_ioctl_mutex);
1da177e4 908 br_ioctl_hook = hook;
4a3e2f71 909 mutex_unlock(&br_ioctl_mutex);
1da177e4
LT
910}
911EXPORT_SYMBOL(brioctl_set);
912
4a3e2f71 913static DEFINE_MUTEX(vlan_ioctl_mutex);
881d966b 914static int (*vlan_ioctl_hook) (struct net *, void __user *arg);
1da177e4 915
881d966b 916void vlan_ioctl_set(int (*hook) (struct net *, void __user *))
1da177e4 917{
4a3e2f71 918 mutex_lock(&vlan_ioctl_mutex);
1da177e4 919 vlan_ioctl_hook = hook;
4a3e2f71 920 mutex_unlock(&vlan_ioctl_mutex);
1da177e4
LT
921}
922EXPORT_SYMBOL(vlan_ioctl_set);
923
4a3e2f71 924static DEFINE_MUTEX(dlci_ioctl_mutex);
89bddce5 925static int (*dlci_ioctl_hook) (unsigned int, void __user *);
1da177e4 926
89bddce5 927void dlci_ioctl_set(int (*hook) (unsigned int, void __user *))
1da177e4 928{
4a3e2f71 929 mutex_lock(&dlci_ioctl_mutex);
1da177e4 930 dlci_ioctl_hook = hook;
4a3e2f71 931 mutex_unlock(&dlci_ioctl_mutex);
1da177e4
LT
932}
933EXPORT_SYMBOL(dlci_ioctl_set);
934
6b96018b
AB
935static long sock_do_ioctl(struct net *net, struct socket *sock,
936 unsigned int cmd, unsigned long arg)
937{
938 int err;
939 void __user *argp = (void __user *)arg;
940
941 err = sock->ops->ioctl(sock, cmd, arg);
942
943 /*
944 * If this ioctl is unknown try to hand it down
945 * to the NIC driver.
946 */
947 if (err == -ENOIOCTLCMD)
948 err = dev_ioctl(net, cmd, argp);
949
950 return err;
951}
952
1da177e4
LT
953/*
954 * With an ioctl, arg may well be a user mode pointer, but we don't know
955 * what to do with it - that's up to the protocol still.
956 */
957
958static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
959{
960 struct socket *sock;
881d966b 961 struct sock *sk;
1da177e4
LT
962 void __user *argp = (void __user *)arg;
963 int pid, err;
881d966b 964 struct net *net;
1da177e4 965
b69aee04 966 sock = file->private_data;
881d966b 967 sk = sock->sk;
3b1e0a65 968 net = sock_net(sk);
1da177e4 969 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
881d966b 970 err = dev_ioctl(net, cmd, argp);
1da177e4 971 } else
3d23e349 972#ifdef CONFIG_WEXT_CORE
1da177e4 973 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
881d966b 974 err = dev_ioctl(net, cmd, argp);
1da177e4 975 } else
3d23e349 976#endif
89bddce5 977 switch (cmd) {
1da177e4
LT
978 case FIOSETOWN:
979 case SIOCSPGRP:
980 err = -EFAULT;
981 if (get_user(pid, (int __user *)argp))
982 break;
983 err = f_setown(sock->file, pid, 1);
984 break;
985 case FIOGETOWN:
986 case SIOCGPGRP:
609d7fa9 987 err = put_user(f_getown(sock->file),
89bddce5 988 (int __user *)argp);
1da177e4
LT
989 break;
990 case SIOCGIFBR:
991 case SIOCSIFBR:
992 case SIOCBRADDBR:
993 case SIOCBRDELBR:
994 err = -ENOPKG;
995 if (!br_ioctl_hook)
996 request_module("bridge");
997
4a3e2f71 998 mutex_lock(&br_ioctl_mutex);
89bddce5 999 if (br_ioctl_hook)
881d966b 1000 err = br_ioctl_hook(net, cmd, argp);
4a3e2f71 1001 mutex_unlock(&br_ioctl_mutex);
1da177e4
LT
1002 break;
1003 case SIOCGIFVLAN:
1004 case SIOCSIFVLAN:
1005 err = -ENOPKG;
1006 if (!vlan_ioctl_hook)
1007 request_module("8021q");
1008
4a3e2f71 1009 mutex_lock(&vlan_ioctl_mutex);
1da177e4 1010 if (vlan_ioctl_hook)
881d966b 1011 err = vlan_ioctl_hook(net, argp);
4a3e2f71 1012 mutex_unlock(&vlan_ioctl_mutex);
1da177e4 1013 break;
1da177e4
LT
1014 case SIOCADDDLCI:
1015 case SIOCDELDLCI:
1016 err = -ENOPKG;
1017 if (!dlci_ioctl_hook)
1018 request_module("dlci");
1019
7512cbf6
PE
1020 mutex_lock(&dlci_ioctl_mutex);
1021 if (dlci_ioctl_hook)
1da177e4 1022 err = dlci_ioctl_hook(cmd, argp);
7512cbf6 1023 mutex_unlock(&dlci_ioctl_mutex);
1da177e4
LT
1024 break;
1025 default:
6b96018b 1026 err = sock_do_ioctl(net, sock, cmd, arg);
1da177e4 1027 break;
89bddce5 1028 }
1da177e4
LT
1029 return err;
1030}
1031
1032int sock_create_lite(int family, int type, int protocol, struct socket **res)
1033{
1034 int err;
1035 struct socket *sock = NULL;
89bddce5 1036
1da177e4
LT
1037 err = security_socket_create(family, type, protocol, 1);
1038 if (err)
1039 goto out;
1040
1041 sock = sock_alloc();
1042 if (!sock) {
1043 err = -ENOMEM;
1044 goto out;
1045 }
1046
1da177e4 1047 sock->type = type;
7420ed23
VY
1048 err = security_socket_post_create(sock, family, type, protocol, 1);
1049 if (err)
1050 goto out_release;
1051
1da177e4
LT
1052out:
1053 *res = sock;
1054 return err;
7420ed23
VY
1055out_release:
1056 sock_release(sock);
1057 sock = NULL;
1058 goto out;
1da177e4 1059}
c6d409cf 1060EXPORT_SYMBOL(sock_create_lite);
1da177e4
LT
1061
1062/* No kernel lock held - perfect */
89bddce5 1063static unsigned int sock_poll(struct file *file, poll_table *wait)
1da177e4
LT
1064{
1065 struct socket *sock;
1066
1067 /*
89bddce5 1068 * We can't return errors to poll, so it's either yes or no.
1da177e4 1069 */
b69aee04 1070 sock = file->private_data;
1da177e4
LT
1071 return sock->ops->poll(file, sock, wait);
1072}
1073
89bddce5 1074static int sock_mmap(struct file *file, struct vm_area_struct *vma)
1da177e4 1075{
b69aee04 1076 struct socket *sock = file->private_data;
1da177e4
LT
1077
1078 return sock->ops->mmap(file, sock, vma);
1079}
1080
20380731 1081static int sock_close(struct inode *inode, struct file *filp)
1da177e4
LT
1082{
1083 /*
89bddce5
SH
1084 * It was possible the inode is NULL we were
1085 * closing an unfinished socket.
1da177e4
LT
1086 */
1087
89bddce5 1088 if (!inode) {
1da177e4
LT
1089 printk(KERN_DEBUG "sock_close: NULL inode\n");
1090 return 0;
1091 }
1da177e4
LT
1092 sock_release(SOCKET_I(inode));
1093 return 0;
1094}
1095
1096/*
1097 * Update the socket async list
1098 *
1099 * Fasync_list locking strategy.
1100 *
1101 * 1. fasync_list is modified only under process context socket lock
1102 * i.e. under semaphore.
1103 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
989a2979 1104 * or under socket lock
1da177e4
LT
1105 */
1106
1107static int sock_fasync(int fd, struct file *filp, int on)
1108{
989a2979
ED
1109 struct socket *sock = filp->private_data;
1110 struct sock *sk = sock->sk;
1da177e4 1111
989a2979 1112 if (sk == NULL)
1da177e4 1113 return -EINVAL;
1da177e4
LT
1114
1115 lock_sock(sk);
1116
43815482 1117 fasync_helper(fd, filp, on, &sock->wq->fasync_list);
1da177e4 1118
43815482 1119 if (!sock->wq->fasync_list)
989a2979
ED
1120 sock_reset_flag(sk, SOCK_FASYNC);
1121 else
bcdce719 1122 sock_set_flag(sk, SOCK_FASYNC);
1da177e4 1123
989a2979 1124 release_sock(sk);
1da177e4
LT
1125 return 0;
1126}
1127
43815482 1128/* This function may be called only under socket lock or callback_lock or rcu_lock */
1da177e4
LT
1129
1130int sock_wake_async(struct socket *sock, int how, int band)
1131{
43815482
ED
1132 struct socket_wq *wq;
1133
1134 if (!sock)
1135 return -1;
1136 rcu_read_lock();
1137 wq = rcu_dereference(sock->wq);
1138 if (!wq || !wq->fasync_list) {
1139 rcu_read_unlock();
1da177e4 1140 return -1;
43815482 1141 }
89bddce5 1142 switch (how) {
8d8ad9d7 1143 case SOCK_WAKE_WAITD:
1da177e4
LT
1144 if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
1145 break;
1146 goto call_kill;
8d8ad9d7 1147 case SOCK_WAKE_SPACE:
1da177e4
LT
1148 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
1149 break;
1150 /* fall through */
8d8ad9d7 1151 case SOCK_WAKE_IO:
89bddce5 1152call_kill:
43815482 1153 kill_fasync(&wq->fasync_list, SIGIO, band);
1da177e4 1154 break;
8d8ad9d7 1155 case SOCK_WAKE_URG:
43815482 1156 kill_fasync(&wq->fasync_list, SIGURG, band);
1da177e4 1157 }
43815482 1158 rcu_read_unlock();
1da177e4
LT
1159 return 0;
1160}
c6d409cf 1161EXPORT_SYMBOL(sock_wake_async);
1da177e4 1162
721db93a 1163int __sock_create(struct net *net, int family, int type, int protocol,
89bddce5 1164 struct socket **res, int kern)
1da177e4
LT
1165{
1166 int err;
1167 struct socket *sock;
55737fda 1168 const struct net_proto_family *pf;
1da177e4
LT
1169
1170 /*
89bddce5 1171 * Check protocol is in range
1da177e4
LT
1172 */
1173 if (family < 0 || family >= NPROTO)
1174 return -EAFNOSUPPORT;
1175 if (type < 0 || type >= SOCK_MAX)
1176 return -EINVAL;
1177
1178 /* Compatibility.
1179
1180 This uglymoron is moved from INET layer to here to avoid
1181 deadlock in module load.
1182 */
1183 if (family == PF_INET && type == SOCK_PACKET) {
89bddce5 1184 static int warned;
1da177e4
LT
1185 if (!warned) {
1186 warned = 1;
89bddce5
SH
1187 printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1188 current->comm);
1da177e4
LT
1189 }
1190 family = PF_PACKET;
1191 }
1192
1193 err = security_socket_create(family, type, protocol, kern);
1194 if (err)
1195 return err;
89bddce5 1196
55737fda
SH
1197 /*
1198 * Allocate the socket and allow the family to set things up. if
1199 * the protocol is 0, the family is instructed to select an appropriate
1200 * default.
1201 */
1202 sock = sock_alloc();
1203 if (!sock) {
1204 if (net_ratelimit())
1205 printk(KERN_WARNING "socket: no more sockets\n");
1206 return -ENFILE; /* Not exactly a match, but its the
1207 closest posix thing */
1208 }
1209
1210 sock->type = type;
1211
95a5afca 1212#ifdef CONFIG_MODULES
89bddce5
SH
1213 /* Attempt to load a protocol module if the find failed.
1214 *
1215 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
1da177e4
LT
1216 * requested real, full-featured networking support upon configuration.
1217 * Otherwise module support will break!
1218 */
190683a9 1219 if (rcu_access_pointer(net_families[family]) == NULL)
89bddce5 1220 request_module("net-pf-%d", family);
1da177e4
LT
1221#endif
1222
55737fda
SH
1223 rcu_read_lock();
1224 pf = rcu_dereference(net_families[family]);
1225 err = -EAFNOSUPPORT;
1226 if (!pf)
1227 goto out_release;
1da177e4
LT
1228
1229 /*
1230 * We will call the ->create function, that possibly is in a loadable
1231 * module, so we have to bump that loadable module refcnt first.
1232 */
55737fda 1233 if (!try_module_get(pf->owner))
1da177e4
LT
1234 goto out_release;
1235
55737fda
SH
1236 /* Now protected by module ref count */
1237 rcu_read_unlock();
1238
3f378b68 1239 err = pf->create(net, sock, protocol, kern);
55737fda 1240 if (err < 0)
1da177e4 1241 goto out_module_put;
a79af59e 1242
1da177e4
LT
1243 /*
1244 * Now to bump the refcnt of the [loadable] module that owns this
1245 * socket at sock_release time we decrement its refcnt.
1246 */
55737fda
SH
1247 if (!try_module_get(sock->ops->owner))
1248 goto out_module_busy;
1249
1da177e4
LT
1250 /*
1251 * Now that we're done with the ->create function, the [loadable]
1252 * module can have its refcnt decremented
1253 */
55737fda 1254 module_put(pf->owner);
7420ed23
VY
1255 err = security_socket_post_create(sock, family, type, protocol, kern);
1256 if (err)
3b185525 1257 goto out_sock_release;
55737fda 1258 *res = sock;
1da177e4 1259
55737fda
SH
1260 return 0;
1261
1262out_module_busy:
1263 err = -EAFNOSUPPORT;
1da177e4 1264out_module_put:
55737fda
SH
1265 sock->ops = NULL;
1266 module_put(pf->owner);
1267out_sock_release:
1da177e4 1268 sock_release(sock);
55737fda
SH
1269 return err;
1270
1271out_release:
1272 rcu_read_unlock();
1273 goto out_sock_release;
1da177e4 1274}
721db93a 1275EXPORT_SYMBOL(__sock_create);
1da177e4
LT
1276
1277int sock_create(int family, int type, int protocol, struct socket **res)
1278{
1b8d7ae4 1279 return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0);
1da177e4 1280}
c6d409cf 1281EXPORT_SYMBOL(sock_create);
1da177e4
LT
1282
1283int sock_create_kern(int family, int type, int protocol, struct socket **res)
1284{
1b8d7ae4 1285 return __sock_create(&init_net, family, type, protocol, res, 1);
1da177e4 1286}
c6d409cf 1287EXPORT_SYMBOL(sock_create_kern);
1da177e4 1288
3e0fa65f 1289SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol)
1da177e4
LT
1290{
1291 int retval;
1292 struct socket *sock;
a677a039
UD
1293 int flags;
1294
e38b36f3
UD
1295 /* Check the SOCK_* constants for consistency. */
1296 BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC);
1297 BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK);
1298 BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK);
1299 BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK);
1300
a677a039 1301 flags = type & ~SOCK_TYPE_MASK;
77d27200 1302 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
a677a039
UD
1303 return -EINVAL;
1304 type &= SOCK_TYPE_MASK;
1da177e4 1305
aaca0bdc
UD
1306 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1307 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1308
1da177e4
LT
1309 retval = sock_create(family, type, protocol, &sock);
1310 if (retval < 0)
1311 goto out;
1312
77d27200 1313 retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK));
1da177e4
LT
1314 if (retval < 0)
1315 goto out_release;
1316
1317out:
1318 /* It may be already another descriptor 8) Not kernel problem. */
1319 return retval;
1320
1321out_release:
1322 sock_release(sock);
1323 return retval;
1324}
1325
1326/*
1327 * Create a pair of connected sockets.
1328 */
1329
3e0fa65f
HC
1330SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
1331 int __user *, usockvec)
1da177e4
LT
1332{
1333 struct socket *sock1, *sock2;
1334 int fd1, fd2, err;
db349509 1335 struct file *newfile1, *newfile2;
a677a039
UD
1336 int flags;
1337
1338 flags = type & ~SOCK_TYPE_MASK;
77d27200 1339 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
a677a039
UD
1340 return -EINVAL;
1341 type &= SOCK_TYPE_MASK;
1da177e4 1342
aaca0bdc
UD
1343 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1344 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1345
1da177e4
LT
1346 /*
1347 * Obtain the first socket and check if the underlying protocol
1348 * supports the socketpair call.
1349 */
1350
1351 err = sock_create(family, type, protocol, &sock1);
1352 if (err < 0)
1353 goto out;
1354
1355 err = sock_create(family, type, protocol, &sock2);
1356 if (err < 0)
1357 goto out_release_1;
1358
1359 err = sock1->ops->socketpair(sock1, sock2);
89bddce5 1360 if (err < 0)
1da177e4
LT
1361 goto out_release_both;
1362
7cbe66b6 1363 fd1 = sock_alloc_file(sock1, &newfile1, flags);
bf3c23d1
DM
1364 if (unlikely(fd1 < 0)) {
1365 err = fd1;
db349509 1366 goto out_release_both;
bf3c23d1 1367 }
1da177e4 1368
7cbe66b6 1369 fd2 = sock_alloc_file(sock2, &newfile2, flags);
198de4d7
AV
1370 if (unlikely(fd2 < 0)) {
1371 err = fd2;
1372 fput(newfile1);
1373 put_unused_fd(fd1);
1374 sock_release(sock2);
1375 goto out;
db349509
AV
1376 }
1377
157cf649 1378 audit_fd_pair(fd1, fd2);
db349509
AV
1379 fd_install(fd1, newfile1);
1380 fd_install(fd2, newfile2);
1da177e4
LT
1381 /* fd1 and fd2 may be already another descriptors.
1382 * Not kernel problem.
1383 */
1384
89bddce5 1385 err = put_user(fd1, &usockvec[0]);
1da177e4
LT
1386 if (!err)
1387 err = put_user(fd2, &usockvec[1]);
1388 if (!err)
1389 return 0;
1390
1391 sys_close(fd2);
1392 sys_close(fd1);
1393 return err;
1394
1da177e4 1395out_release_both:
89bddce5 1396 sock_release(sock2);
1da177e4 1397out_release_1:
89bddce5 1398 sock_release(sock1);
1da177e4
LT
1399out:
1400 return err;
1401}
1402
1da177e4
LT
1403/*
1404 * Bind a name to a socket. Nothing much to do here since it's
1405 * the protocol's responsibility to handle the local address.
1406 *
1407 * We move the socket address to kernel space before we call
1408 * the protocol layer (having also checked the address is ok).
1409 */
1410
20f37034 1411SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen)
1da177e4
LT
1412{
1413 struct socket *sock;
230b1839 1414 struct sockaddr_storage address;
6cb153ca 1415 int err, fput_needed;
1da177e4 1416
89bddce5 1417 sock = sockfd_lookup_light(fd, &err, &fput_needed);
e71a4783 1418 if (sock) {
230b1839 1419 err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address);
89bddce5
SH
1420 if (err >= 0) {
1421 err = security_socket_bind(sock,
230b1839 1422 (struct sockaddr *)&address,
89bddce5 1423 addrlen);
6cb153ca
BL
1424 if (!err)
1425 err = sock->ops->bind(sock,
89bddce5 1426 (struct sockaddr *)
230b1839 1427 &address, addrlen);
1da177e4 1428 }
6cb153ca 1429 fput_light(sock->file, fput_needed);
89bddce5 1430 }
1da177e4
LT
1431 return err;
1432}
1433
1da177e4
LT
1434/*
1435 * Perform a listen. Basically, we allow the protocol to do anything
1436 * necessary for a listen, and if that works, we mark the socket as
1437 * ready for listening.
1438 */
1439
3e0fa65f 1440SYSCALL_DEFINE2(listen, int, fd, int, backlog)
1da177e4
LT
1441{
1442 struct socket *sock;
6cb153ca 1443 int err, fput_needed;
b8e1f9b5 1444 int somaxconn;
89bddce5
SH
1445
1446 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1447 if (sock) {
8efa6e93 1448 somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn;
b8e1f9b5
PE
1449 if ((unsigned)backlog > somaxconn)
1450 backlog = somaxconn;
1da177e4
LT
1451
1452 err = security_socket_listen(sock, backlog);
6cb153ca
BL
1453 if (!err)
1454 err = sock->ops->listen(sock, backlog);
1da177e4 1455
6cb153ca 1456 fput_light(sock->file, fput_needed);
1da177e4
LT
1457 }
1458 return err;
1459}
1460
1da177e4
LT
1461/*
1462 * For accept, we attempt to create a new socket, set up the link
1463 * with the client, wake up the client, then return the new
1464 * connected fd. We collect the address of the connector in kernel
1465 * space and move it to user at the very end. This is unclean because
1466 * we open the socket then return an error.
1467 *
1468 * 1003.1g adds the ability to recvmsg() to query connection pending
1469 * status to recvmsg. We need to add that support in a way thats
1470 * clean when we restucture accept also.
1471 */
1472
20f37034
HC
1473SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
1474 int __user *, upeer_addrlen, int, flags)
1da177e4
LT
1475{
1476 struct socket *sock, *newsock;
39d8c1b6 1477 struct file *newfile;
6cb153ca 1478 int err, len, newfd, fput_needed;
230b1839 1479 struct sockaddr_storage address;
1da177e4 1480
77d27200 1481 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
aaca0bdc
UD
1482 return -EINVAL;
1483
1484 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1485 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1486
6cb153ca 1487 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1da177e4
LT
1488 if (!sock)
1489 goto out;
1490
1491 err = -ENFILE;
c6d409cf
ED
1492 newsock = sock_alloc();
1493 if (!newsock)
1da177e4
LT
1494 goto out_put;
1495
1496 newsock->type = sock->type;
1497 newsock->ops = sock->ops;
1498
1da177e4
LT
1499 /*
1500 * We don't need try_module_get here, as the listening socket (sock)
1501 * has the protocol module (sock->ops->owner) held.
1502 */
1503 __module_get(newsock->ops->owner);
1504
7cbe66b6 1505 newfd = sock_alloc_file(newsock, &newfile, flags);
39d8c1b6
DM
1506 if (unlikely(newfd < 0)) {
1507 err = newfd;
9a1875e6
DM
1508 sock_release(newsock);
1509 goto out_put;
39d8c1b6
DM
1510 }
1511
a79af59e
FF
1512 err = security_socket_accept(sock, newsock);
1513 if (err)
39d8c1b6 1514 goto out_fd;
a79af59e 1515
1da177e4
LT
1516 err = sock->ops->accept(sock, newsock, sock->file->f_flags);
1517 if (err < 0)
39d8c1b6 1518 goto out_fd;
1da177e4
LT
1519
1520 if (upeer_sockaddr) {
230b1839 1521 if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
89bddce5 1522 &len, 2) < 0) {
1da177e4 1523 err = -ECONNABORTED;
39d8c1b6 1524 goto out_fd;
1da177e4 1525 }
230b1839
YH
1526 err = move_addr_to_user((struct sockaddr *)&address,
1527 len, upeer_sockaddr, upeer_addrlen);
1da177e4 1528 if (err < 0)
39d8c1b6 1529 goto out_fd;
1da177e4
LT
1530 }
1531
1532 /* File flags are not inherited via accept() unlike another OSes. */
1533
39d8c1b6
DM
1534 fd_install(newfd, newfile);
1535 err = newfd;
1da177e4 1536
1da177e4 1537out_put:
6cb153ca 1538 fput_light(sock->file, fput_needed);
1da177e4
LT
1539out:
1540 return err;
39d8c1b6 1541out_fd:
9606a216 1542 fput(newfile);
39d8c1b6 1543 put_unused_fd(newfd);
1da177e4
LT
1544 goto out_put;
1545}
1546
20f37034
HC
1547SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr,
1548 int __user *, upeer_addrlen)
aaca0bdc 1549{
de11defe 1550 return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0);
aaca0bdc
UD
1551}
1552
1da177e4
LT
1553/*
1554 * Attempt to connect to a socket with the server address. The address
1555 * is in user space so we verify it is OK and move it to kernel space.
1556 *
1557 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1558 * break bindings
1559 *
1560 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1561 * other SEQPACKET protocols that take time to connect() as it doesn't
1562 * include the -EINPROGRESS status for such sockets.
1563 */
1564
20f37034
HC
1565SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
1566 int, addrlen)
1da177e4
LT
1567{
1568 struct socket *sock;
230b1839 1569 struct sockaddr_storage address;
6cb153ca 1570 int err, fput_needed;
1da177e4 1571
6cb153ca 1572 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1da177e4
LT
1573 if (!sock)
1574 goto out;
230b1839 1575 err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address);
1da177e4
LT
1576 if (err < 0)
1577 goto out_put;
1578
89bddce5 1579 err =
230b1839 1580 security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
1da177e4
LT
1581 if (err)
1582 goto out_put;
1583
230b1839 1584 err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
1da177e4
LT
1585 sock->file->f_flags);
1586out_put:
6cb153ca 1587 fput_light(sock->file, fput_needed);
1da177e4
LT
1588out:
1589 return err;
1590}
1591
1592/*
1593 * Get the local address ('name') of a socket object. Move the obtained
1594 * name to user space.
1595 */
1596
20f37034
HC
1597SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
1598 int __user *, usockaddr_len)
1da177e4
LT
1599{
1600 struct socket *sock;
230b1839 1601 struct sockaddr_storage address;
6cb153ca 1602 int len, err, fput_needed;
89bddce5 1603
6cb153ca 1604 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1da177e4
LT
1605 if (!sock)
1606 goto out;
1607
1608 err = security_socket_getsockname(sock);
1609 if (err)
1610 goto out_put;
1611
230b1839 1612 err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0);
1da177e4
LT
1613 if (err)
1614 goto out_put;
230b1839 1615 err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len);
1da177e4
LT
1616
1617out_put:
6cb153ca 1618 fput_light(sock->file, fput_needed);
1da177e4
LT
1619out:
1620 return err;
1621}
1622
1623/*
1624 * Get the remote address ('name') of a socket object. Move the obtained
1625 * name to user space.
1626 */
1627
20f37034
HC
1628SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr,
1629 int __user *, usockaddr_len)
1da177e4
LT
1630{
1631 struct socket *sock;
230b1839 1632 struct sockaddr_storage address;
6cb153ca 1633 int len, err, fput_needed;
1da177e4 1634
89bddce5
SH
1635 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1636 if (sock != NULL) {
1da177e4
LT
1637 err = security_socket_getpeername(sock);
1638 if (err) {
6cb153ca 1639 fput_light(sock->file, fput_needed);
1da177e4
LT
1640 return err;
1641 }
1642
89bddce5 1643 err =
230b1839 1644 sock->ops->getname(sock, (struct sockaddr *)&address, &len,
89bddce5 1645 1);
1da177e4 1646 if (!err)
230b1839 1647 err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr,
89bddce5 1648 usockaddr_len);
6cb153ca 1649 fput_light(sock->file, fput_needed);
1da177e4
LT
1650 }
1651 return err;
1652}
1653
1654/*
1655 * Send a datagram to a given address. We move the address into kernel
1656 * space and check the user space data area is readable before invoking
1657 * the protocol.
1658 */
1659
3e0fa65f
HC
1660SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
1661 unsigned, flags, struct sockaddr __user *, addr,
1662 int, addr_len)
1da177e4
LT
1663{
1664 struct socket *sock;
230b1839 1665 struct sockaddr_storage address;
1da177e4
LT
1666 int err;
1667 struct msghdr msg;
1668 struct iovec iov;
6cb153ca 1669 int fput_needed;
6cb153ca 1670
253eacc0
LT
1671 if (len > INT_MAX)
1672 len = INT_MAX;
de0fa95c
PE
1673 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1674 if (!sock)
4387ff75 1675 goto out;
6cb153ca 1676
89bddce5
SH
1677 iov.iov_base = buff;
1678 iov.iov_len = len;
1679 msg.msg_name = NULL;
1680 msg.msg_iov = &iov;
1681 msg.msg_iovlen = 1;
1682 msg.msg_control = NULL;
1683 msg.msg_controllen = 0;
1684 msg.msg_namelen = 0;
6cb153ca 1685 if (addr) {
230b1839 1686 err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address);
1da177e4
LT
1687 if (err < 0)
1688 goto out_put;
230b1839 1689 msg.msg_name = (struct sockaddr *)&address;
89bddce5 1690 msg.msg_namelen = addr_len;
1da177e4
LT
1691 }
1692 if (sock->file->f_flags & O_NONBLOCK)
1693 flags |= MSG_DONTWAIT;
1694 msg.msg_flags = flags;
1695 err = sock_sendmsg(sock, &msg, len);
1696
89bddce5 1697out_put:
de0fa95c 1698 fput_light(sock->file, fput_needed);
4387ff75 1699out:
1da177e4
LT
1700 return err;
1701}
1702
1703/*
89bddce5 1704 * Send a datagram down a socket.
1da177e4
LT
1705 */
1706
3e0fa65f
HC
1707SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len,
1708 unsigned, flags)
1da177e4
LT
1709{
1710 return sys_sendto(fd, buff, len, flags, NULL, 0);
1711}
1712
1713/*
89bddce5 1714 * Receive a frame from the socket and optionally record the address of the
1da177e4
LT
1715 * sender. We verify the buffers are writable and if needed move the
1716 * sender address from kernel to user space.
1717 */
1718
3e0fa65f
HC
1719SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
1720 unsigned, flags, struct sockaddr __user *, addr,
1721 int __user *, addr_len)
1da177e4
LT
1722{
1723 struct socket *sock;
1724 struct iovec iov;
1725 struct msghdr msg;
230b1839 1726 struct sockaddr_storage address;
89bddce5 1727 int err, err2;
6cb153ca
BL
1728 int fput_needed;
1729
253eacc0
LT
1730 if (size > INT_MAX)
1731 size = INT_MAX;
de0fa95c 1732 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1da177e4 1733 if (!sock)
de0fa95c 1734 goto out;
1da177e4 1735
89bddce5
SH
1736 msg.msg_control = NULL;
1737 msg.msg_controllen = 0;
1738 msg.msg_iovlen = 1;
1739 msg.msg_iov = &iov;
1740 iov.iov_len = size;
1741 iov.iov_base = ubuf;
230b1839
YH
1742 msg.msg_name = (struct sockaddr *)&address;
1743 msg.msg_namelen = sizeof(address);
1da177e4
LT
1744 if (sock->file->f_flags & O_NONBLOCK)
1745 flags |= MSG_DONTWAIT;
89bddce5 1746 err = sock_recvmsg(sock, &msg, size, flags);
1da177e4 1747
89bddce5 1748 if (err >= 0 && addr != NULL) {
230b1839
YH
1749 err2 = move_addr_to_user((struct sockaddr *)&address,
1750 msg.msg_namelen, addr, addr_len);
89bddce5
SH
1751 if (err2 < 0)
1752 err = err2;
1da177e4 1753 }
de0fa95c
PE
1754
1755 fput_light(sock->file, fput_needed);
4387ff75 1756out:
1da177e4
LT
1757 return err;
1758}
1759
1760/*
89bddce5 1761 * Receive a datagram from a socket.
1da177e4
LT
1762 */
1763
89bddce5
SH
1764asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size,
1765 unsigned flags)
1da177e4
LT
1766{
1767 return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
1768}
1769
1770/*
1771 * Set a socket option. Because we don't know the option lengths we have
1772 * to pass the user mode parameter for the protocols to sort out.
1773 */
1774
20f37034
HC
1775SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
1776 char __user *, optval, int, optlen)
1da177e4 1777{
6cb153ca 1778 int err, fput_needed;
1da177e4
LT
1779 struct socket *sock;
1780
1781 if (optlen < 0)
1782 return -EINVAL;
89bddce5
SH
1783
1784 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1785 if (sock != NULL) {
1786 err = security_socket_setsockopt(sock, level, optname);
6cb153ca
BL
1787 if (err)
1788 goto out_put;
1da177e4
LT
1789
1790 if (level == SOL_SOCKET)
89bddce5
SH
1791 err =
1792 sock_setsockopt(sock, level, optname, optval,
1793 optlen);
1da177e4 1794 else
89bddce5
SH
1795 err =
1796 sock->ops->setsockopt(sock, level, optname, optval,
1797 optlen);
6cb153ca
BL
1798out_put:
1799 fput_light(sock->file, fput_needed);
1da177e4
LT
1800 }
1801 return err;
1802}
1803
1804/*
1805 * Get a socket option. Because we don't know the option lengths we have
1806 * to pass a user mode parameter for the protocols to sort out.
1807 */
1808
20f37034
HC
1809SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
1810 char __user *, optval, int __user *, optlen)
1da177e4 1811{
6cb153ca 1812 int err, fput_needed;
1da177e4
LT
1813 struct socket *sock;
1814
89bddce5
SH
1815 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1816 if (sock != NULL) {
6cb153ca
BL
1817 err = security_socket_getsockopt(sock, level, optname);
1818 if (err)
1819 goto out_put;
1da177e4
LT
1820
1821 if (level == SOL_SOCKET)
89bddce5
SH
1822 err =
1823 sock_getsockopt(sock, level, optname, optval,
1824 optlen);
1da177e4 1825 else
89bddce5
SH
1826 err =
1827 sock->ops->getsockopt(sock, level, optname, optval,
1828 optlen);
6cb153ca
BL
1829out_put:
1830 fput_light(sock->file, fput_needed);
1da177e4
LT
1831 }
1832 return err;
1833}
1834
1da177e4
LT
1835/*
1836 * Shutdown a socket.
1837 */
1838
754fe8d2 1839SYSCALL_DEFINE2(shutdown, int, fd, int, how)
1da177e4 1840{
6cb153ca 1841 int err, fput_needed;
1da177e4
LT
1842 struct socket *sock;
1843
89bddce5
SH
1844 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1845 if (sock != NULL) {
1da177e4 1846 err = security_socket_shutdown(sock, how);
6cb153ca
BL
1847 if (!err)
1848 err = sock->ops->shutdown(sock, how);
1849 fput_light(sock->file, fput_needed);
1da177e4
LT
1850 }
1851 return err;
1852}
1853
89bddce5 1854/* A couple of helpful macros for getting the address of the 32/64 bit
1da177e4
LT
1855 * fields which are the same type (int / unsigned) on our platforms.
1856 */
1857#define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1858#define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1859#define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1860
1da177e4
LT
1861/*
1862 * BSD sendmsg interface
1863 */
1864
3e0fa65f 1865SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
1da177e4 1866{
89bddce5
SH
1867 struct compat_msghdr __user *msg_compat =
1868 (struct compat_msghdr __user *)msg;
1da177e4 1869 struct socket *sock;
230b1839 1870 struct sockaddr_storage address;
1da177e4 1871 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
b9d717a7 1872 unsigned char ctl[sizeof(struct cmsghdr) + 20]
89bddce5
SH
1873 __attribute__ ((aligned(sizeof(__kernel_size_t))));
1874 /* 20 is size of ipv6_pktinfo */
1da177e4
LT
1875 unsigned char *ctl_buf = ctl;
1876 struct msghdr msg_sys;
1877 int err, ctl_len, iov_size, total_len;
6cb153ca 1878 int fput_needed;
89bddce5 1879
1da177e4
LT
1880 err = -EFAULT;
1881 if (MSG_CMSG_COMPAT & flags) {
1882 if (get_compat_msghdr(&msg_sys, msg_compat))
1883 return -EFAULT;
c6d409cf 1884 } else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
1da177e4
LT
1885 return -EFAULT;
1886
6cb153ca 1887 sock = sockfd_lookup_light(fd, &err, &fput_needed);
89bddce5 1888 if (!sock)
1da177e4
LT
1889 goto out;
1890
1891 /* do not move before msg_sys is valid */
1892 err = -EMSGSIZE;
1893 if (msg_sys.msg_iovlen > UIO_MAXIOV)
1894 goto out_put;
1895
89bddce5 1896 /* Check whether to allocate the iovec area */
1da177e4
LT
1897 err = -ENOMEM;
1898 iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
1899 if (msg_sys.msg_iovlen > UIO_FASTIOV) {
1900 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
1901 if (!iov)
1902 goto out_put;
1903 }
1904
1905 /* This will also move the address data into kernel space */
1906 if (MSG_CMSG_COMPAT & flags) {
230b1839
YH
1907 err = verify_compat_iovec(&msg_sys, iov,
1908 (struct sockaddr *)&address,
1909 VERIFY_READ);
1da177e4 1910 } else
230b1839
YH
1911 err = verify_iovec(&msg_sys, iov,
1912 (struct sockaddr *)&address,
1913 VERIFY_READ);
89bddce5 1914 if (err < 0)
1da177e4
LT
1915 goto out_freeiov;
1916 total_len = err;
1917
1918 err = -ENOBUFS;
1919
1920 if (msg_sys.msg_controllen > INT_MAX)
1921 goto out_freeiov;
89bddce5 1922 ctl_len = msg_sys.msg_controllen;
1da177e4 1923 if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
89bddce5
SH
1924 err =
1925 cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl,
1926 sizeof(ctl));
1da177e4
LT
1927 if (err)
1928 goto out_freeiov;
1929 ctl_buf = msg_sys.msg_control;
8920e8f9 1930 ctl_len = msg_sys.msg_controllen;
1da177e4 1931 } else if (ctl_len) {
89bddce5 1932 if (ctl_len > sizeof(ctl)) {
1da177e4 1933 ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
89bddce5 1934 if (ctl_buf == NULL)
1da177e4
LT
1935 goto out_freeiov;
1936 }
1937 err = -EFAULT;
1938 /*
1939 * Careful! Before this, msg_sys.msg_control contains a user pointer.
1940 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
1941 * checking falls down on this.
1942 */
fb8621bb
NK
1943 if (copy_from_user(ctl_buf,
1944 (void __user __force *)msg_sys.msg_control,
89bddce5 1945 ctl_len))
1da177e4
LT
1946 goto out_freectl;
1947 msg_sys.msg_control = ctl_buf;
1948 }
1949 msg_sys.msg_flags = flags;
1950
1951 if (sock->file->f_flags & O_NONBLOCK)
1952 msg_sys.msg_flags |= MSG_DONTWAIT;
1953 err = sock_sendmsg(sock, &msg_sys, total_len);
1954
1955out_freectl:
89bddce5 1956 if (ctl_buf != ctl)
1da177e4
LT
1957 sock_kfree_s(sock->sk, ctl_buf, ctl_len);
1958out_freeiov:
1959 if (iov != iovstack)
1960 sock_kfree_s(sock->sk, iov, iov_size);
1961out_put:
6cb153ca 1962 fput_light(sock->file, fput_needed);
89bddce5 1963out:
1da177e4
LT
1964 return err;
1965}
1966
a2e27255
ACM
1967static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
1968 struct msghdr *msg_sys, unsigned flags, int nosec)
1da177e4 1969{
89bddce5
SH
1970 struct compat_msghdr __user *msg_compat =
1971 (struct compat_msghdr __user *)msg;
1da177e4 1972 struct iovec iovstack[UIO_FASTIOV];
89bddce5 1973 struct iovec *iov = iovstack;
1da177e4
LT
1974 unsigned long cmsg_ptr;
1975 int err, iov_size, total_len, len;
1976
1977 /* kernel mode address */
230b1839 1978 struct sockaddr_storage addr;
1da177e4
LT
1979
1980 /* user mode address pointers */
1981 struct sockaddr __user *uaddr;
1982 int __user *uaddr_len;
89bddce5 1983
1da177e4 1984 if (MSG_CMSG_COMPAT & flags) {
a2e27255 1985 if (get_compat_msghdr(msg_sys, msg_compat))
1da177e4 1986 return -EFAULT;
c6d409cf 1987 } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr)))
89bddce5 1988 return -EFAULT;
1da177e4 1989
1da177e4 1990 err = -EMSGSIZE;
a2e27255
ACM
1991 if (msg_sys->msg_iovlen > UIO_MAXIOV)
1992 goto out;
89bddce5
SH
1993
1994 /* Check whether to allocate the iovec area */
1da177e4 1995 err = -ENOMEM;
a2e27255
ACM
1996 iov_size = msg_sys->msg_iovlen * sizeof(struct iovec);
1997 if (msg_sys->msg_iovlen > UIO_FASTIOV) {
1da177e4
LT
1998 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
1999 if (!iov)
a2e27255 2000 goto out;
1da177e4
LT
2001 }
2002
2003 /*
89bddce5
SH
2004 * Save the user-mode address (verify_iovec will change the
2005 * kernel msghdr to use the kernel address space)
1da177e4 2006 */
89bddce5 2007
a2e27255 2008 uaddr = (__force void __user *)msg_sys->msg_name;
1da177e4
LT
2009 uaddr_len = COMPAT_NAMELEN(msg);
2010 if (MSG_CMSG_COMPAT & flags) {
a2e27255 2011 err = verify_compat_iovec(msg_sys, iov,
230b1839
YH
2012 (struct sockaddr *)&addr,
2013 VERIFY_WRITE);
1da177e4 2014 } else
a2e27255 2015 err = verify_iovec(msg_sys, iov,
230b1839
YH
2016 (struct sockaddr *)&addr,
2017 VERIFY_WRITE);
1da177e4
LT
2018 if (err < 0)
2019 goto out_freeiov;
89bddce5 2020 total_len = err;
1da177e4 2021
a2e27255
ACM
2022 cmsg_ptr = (unsigned long)msg_sys->msg_control;
2023 msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
89bddce5 2024
1da177e4
LT
2025 if (sock->file->f_flags & O_NONBLOCK)
2026 flags |= MSG_DONTWAIT;
a2e27255
ACM
2027 err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
2028 total_len, flags);
1da177e4
LT
2029 if (err < 0)
2030 goto out_freeiov;
2031 len = err;
2032
2033 if (uaddr != NULL) {
230b1839 2034 err = move_addr_to_user((struct sockaddr *)&addr,
a2e27255 2035 msg_sys->msg_namelen, uaddr,
89bddce5 2036 uaddr_len);
1da177e4
LT
2037 if (err < 0)
2038 goto out_freeiov;
2039 }
a2e27255 2040 err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
37f7f421 2041 COMPAT_FLAGS(msg));
1da177e4
LT
2042 if (err)
2043 goto out_freeiov;
2044 if (MSG_CMSG_COMPAT & flags)
a2e27255 2045 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
1da177e4
LT
2046 &msg_compat->msg_controllen);
2047 else
a2e27255 2048 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
1da177e4
LT
2049 &msg->msg_controllen);
2050 if (err)
2051 goto out_freeiov;
2052 err = len;
2053
2054out_freeiov:
2055 if (iov != iovstack)
2056 sock_kfree_s(sock->sk, iov, iov_size);
a2e27255
ACM
2057out:
2058 return err;
2059}
2060
2061/*
2062 * BSD recvmsg interface
2063 */
2064
2065SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
2066 unsigned int, flags)
2067{
2068 int fput_needed, err;
2069 struct msghdr msg_sys;
2070 struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed);
2071
2072 if (!sock)
2073 goto out;
2074
2075 err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0);
2076
6cb153ca 2077 fput_light(sock->file, fput_needed);
1da177e4
LT
2078out:
2079 return err;
2080}
2081
a2e27255
ACM
2082/*
2083 * Linux recvmmsg interface
2084 */
2085
2086int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
2087 unsigned int flags, struct timespec *timeout)
2088{
2089 int fput_needed, err, datagrams;
2090 struct socket *sock;
2091 struct mmsghdr __user *entry;
d7256d0e 2092 struct compat_mmsghdr __user *compat_entry;
a2e27255
ACM
2093 struct msghdr msg_sys;
2094 struct timespec end_time;
2095
2096 if (timeout &&
2097 poll_select_set_timeout(&end_time, timeout->tv_sec,
2098 timeout->tv_nsec))
2099 return -EINVAL;
2100
2101 datagrams = 0;
2102
2103 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2104 if (!sock)
2105 return err;
2106
2107 err = sock_error(sock->sk);
2108 if (err)
2109 goto out_put;
2110
2111 entry = mmsg;
d7256d0e 2112 compat_entry = (struct compat_mmsghdr __user *)mmsg;
a2e27255
ACM
2113
2114 while (datagrams < vlen) {
2115 /*
2116 * No need to ask LSM for more than the first datagram.
2117 */
d7256d0e
JMG
2118 if (MSG_CMSG_COMPAT & flags) {
2119 err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry,
2120 &msg_sys, flags, datagrams);
2121 if (err < 0)
2122 break;
2123 err = __put_user(err, &compat_entry->msg_len);
2124 ++compat_entry;
2125 } else {
2126 err = __sys_recvmsg(sock, (struct msghdr __user *)entry,
2127 &msg_sys, flags, datagrams);
2128 if (err < 0)
2129 break;
2130 err = put_user(err, &entry->msg_len);
2131 ++entry;
2132 }
2133
a2e27255
ACM
2134 if (err)
2135 break;
a2e27255
ACM
2136 ++datagrams;
2137
71c5c159
BB
2138 /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
2139 if (flags & MSG_WAITFORONE)
2140 flags |= MSG_DONTWAIT;
2141
a2e27255
ACM
2142 if (timeout) {
2143 ktime_get_ts(timeout);
2144 *timeout = timespec_sub(end_time, *timeout);
2145 if (timeout->tv_sec < 0) {
2146 timeout->tv_sec = timeout->tv_nsec = 0;
2147 break;
2148 }
2149
2150 /* Timeout, return less than vlen datagrams */
2151 if (timeout->tv_nsec == 0 && timeout->tv_sec == 0)
2152 break;
2153 }
2154
2155 /* Out of band data, return right away */
2156 if (msg_sys.msg_flags & MSG_OOB)
2157 break;
2158 }
2159
2160out_put:
2161 fput_light(sock->file, fput_needed);
1da177e4 2162
a2e27255
ACM
2163 if (err == 0)
2164 return datagrams;
2165
2166 if (datagrams != 0) {
2167 /*
2168 * We may return less entries than requested (vlen) if the
2169 * sock is non block and there aren't enough datagrams...
2170 */
2171 if (err != -EAGAIN) {
2172 /*
2173 * ... or if recvmsg returns an error after we
2174 * received some datagrams, where we record the
2175 * error to return on the next call or if the
2176 * app asks about it using getsockopt(SO_ERROR).
2177 */
2178 sock->sk->sk_err = -err;
2179 }
2180
2181 return datagrams;
2182 }
2183
2184 return err;
2185}
2186
2187SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,
2188 unsigned int, vlen, unsigned int, flags,
2189 struct timespec __user *, timeout)
2190{
2191 int datagrams;
2192 struct timespec timeout_sys;
2193
2194 if (!timeout)
2195 return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL);
2196
2197 if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys)))
2198 return -EFAULT;
2199
2200 datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys);
2201
2202 if (datagrams > 0 &&
2203 copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys)))
2204 datagrams = -EFAULT;
2205
2206 return datagrams;
2207}
2208
2209#ifdef __ARCH_WANT_SYS_SOCKETCALL
1da177e4
LT
2210/* Argument list sizes for sys_socketcall */
2211#define AL(x) ((x) * sizeof(unsigned long))
a2e27255 2212static const unsigned char nargs[20] = {
c6d409cf
ED
2213 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
2214 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
2215 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
2216 AL(4), AL(5)
89bddce5
SH
2217};
2218
1da177e4
LT
2219#undef AL
2220
2221/*
89bddce5 2222 * System call vectors.
1da177e4
LT
2223 *
2224 * Argument checking cleaned up. Saved 20% in size.
2225 * This function doesn't need to set the kernel lock because
89bddce5 2226 * it is set by the callees.
1da177e4
LT
2227 */
2228
3e0fa65f 2229SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
1da177e4
LT
2230{
2231 unsigned long a[6];
89bddce5 2232 unsigned long a0, a1;
1da177e4 2233 int err;
47379052 2234 unsigned int len;
1da177e4 2235
a2e27255 2236 if (call < 1 || call > SYS_RECVMMSG)
1da177e4
LT
2237 return -EINVAL;
2238
47379052
AV
2239 len = nargs[call];
2240 if (len > sizeof(a))
2241 return -EINVAL;
2242
1da177e4 2243 /* copy_from_user should be SMP safe. */
47379052 2244 if (copy_from_user(a, args, len))
1da177e4 2245 return -EFAULT;
3ec3b2fb 2246
f3298dc4 2247 audit_socketcall(nargs[call] / sizeof(unsigned long), a);
3ec3b2fb 2248
89bddce5
SH
2249 a0 = a[0];
2250 a1 = a[1];
2251
2252 switch (call) {
2253 case SYS_SOCKET:
2254 err = sys_socket(a0, a1, a[2]);
2255 break;
2256 case SYS_BIND:
2257 err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
2258 break;
2259 case SYS_CONNECT:
2260 err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]);
2261 break;
2262 case SYS_LISTEN:
2263 err = sys_listen(a0, a1);
2264 break;
2265 case SYS_ACCEPT:
de11defe
UD
2266 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2267 (int __user *)a[2], 0);
89bddce5
SH
2268 break;
2269 case SYS_GETSOCKNAME:
2270 err =
2271 sys_getsockname(a0, (struct sockaddr __user *)a1,
2272 (int __user *)a[2]);
2273 break;
2274 case SYS_GETPEERNAME:
2275 err =
2276 sys_getpeername(a0, (struct sockaddr __user *)a1,
2277 (int __user *)a[2]);
2278 break;
2279 case SYS_SOCKETPAIR:
2280 err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]);
2281 break;
2282 case SYS_SEND:
2283 err = sys_send(a0, (void __user *)a1, a[2], a[3]);
2284 break;
2285 case SYS_SENDTO:
2286 err = sys_sendto(a0, (void __user *)a1, a[2], a[3],
2287 (struct sockaddr __user *)a[4], a[5]);
2288 break;
2289 case SYS_RECV:
2290 err = sys_recv(a0, (void __user *)a1, a[2], a[3]);
2291 break;
2292 case SYS_RECVFROM:
2293 err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
2294 (struct sockaddr __user *)a[4],
2295 (int __user *)a[5]);
2296 break;
2297 case SYS_SHUTDOWN:
2298 err = sys_shutdown(a0, a1);
2299 break;
2300 case SYS_SETSOCKOPT:
2301 err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]);
2302 break;
2303 case SYS_GETSOCKOPT:
2304 err =
2305 sys_getsockopt(a0, a1, a[2], (char __user *)a[3],
2306 (int __user *)a[4]);
2307 break;
2308 case SYS_SENDMSG:
2309 err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]);
2310 break;
2311 case SYS_RECVMSG:
2312 err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]);
2313 break;
a2e27255
ACM
2314 case SYS_RECVMMSG:
2315 err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3],
2316 (struct timespec __user *)a[4]);
2317 break;
de11defe
UD
2318 case SYS_ACCEPT4:
2319 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2320 (int __user *)a[2], a[3]);
aaca0bdc 2321 break;
89bddce5
SH
2322 default:
2323 err = -EINVAL;
2324 break;
1da177e4
LT
2325 }
2326 return err;
2327}
2328
89bddce5 2329#endif /* __ARCH_WANT_SYS_SOCKETCALL */
1da177e4 2330
55737fda
SH
2331/**
2332 * sock_register - add a socket protocol handler
2333 * @ops: description of protocol
2334 *
1da177e4
LT
2335 * This function is called by a protocol handler that wants to
2336 * advertise its address family, and have it linked into the
55737fda
SH
2337 * socket interface. The value ops->family coresponds to the
2338 * socket system call protocol family.
1da177e4 2339 */
f0fd27d4 2340int sock_register(const struct net_proto_family *ops)
1da177e4
LT
2341{
2342 int err;
2343
2344 if (ops->family >= NPROTO) {
89bddce5
SH
2345 printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family,
2346 NPROTO);
1da177e4
LT
2347 return -ENOBUFS;
2348 }
55737fda
SH
2349
2350 spin_lock(&net_family_lock);
190683a9
ED
2351 if (rcu_dereference_protected(net_families[ops->family],
2352 lockdep_is_held(&net_family_lock)))
55737fda
SH
2353 err = -EEXIST;
2354 else {
190683a9 2355 rcu_assign_pointer(net_families[ops->family], ops);
1da177e4
LT
2356 err = 0;
2357 }
55737fda
SH
2358 spin_unlock(&net_family_lock);
2359
89bddce5 2360 printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family);
1da177e4
LT
2361 return err;
2362}
c6d409cf 2363EXPORT_SYMBOL(sock_register);
1da177e4 2364
55737fda
SH
2365/**
2366 * sock_unregister - remove a protocol handler
2367 * @family: protocol family to remove
2368 *
1da177e4
LT
2369 * This function is called by a protocol handler that wants to
2370 * remove its address family, and have it unlinked from the
55737fda
SH
2371 * new socket creation.
2372 *
2373 * If protocol handler is a module, then it can use module reference
2374 * counts to protect against new references. If protocol handler is not
2375 * a module then it needs to provide its own protection in
2376 * the ops->create routine.
1da177e4 2377 */
f0fd27d4 2378void sock_unregister(int family)
1da177e4 2379{
f0fd27d4 2380 BUG_ON(family < 0 || family >= NPROTO);
1da177e4 2381
55737fda 2382 spin_lock(&net_family_lock);
190683a9 2383 rcu_assign_pointer(net_families[family], NULL);
55737fda
SH
2384 spin_unlock(&net_family_lock);
2385
2386 synchronize_rcu();
2387
89bddce5 2388 printk(KERN_INFO "NET: Unregistered protocol family %d\n", family);
1da177e4 2389}
c6d409cf 2390EXPORT_SYMBOL(sock_unregister);
1da177e4 2391
77d76ea3 2392static int __init sock_init(void)
1da177e4 2393{
b3e19d92
NP
2394 int err;
2395
1da177e4 2396 /*
89bddce5 2397 * Initialize sock SLAB cache.
1da177e4 2398 */
89bddce5 2399
1da177e4
LT
2400 sk_init();
2401
1da177e4 2402 /*
89bddce5 2403 * Initialize skbuff SLAB cache
1da177e4
LT
2404 */
2405 skb_init();
1da177e4
LT
2406
2407 /*
89bddce5 2408 * Initialize the protocols module.
1da177e4
LT
2409 */
2410
2411 init_inodecache();
b3e19d92
NP
2412
2413 err = register_filesystem(&sock_fs_type);
2414 if (err)
2415 goto out_fs;
1da177e4 2416 sock_mnt = kern_mount(&sock_fs_type);
b3e19d92
NP
2417 if (IS_ERR(sock_mnt)) {
2418 err = PTR_ERR(sock_mnt);
2419 goto out_mount;
2420 }
77d76ea3
AK
2421
2422 /* The real protocol initialization is performed in later initcalls.
1da177e4
LT
2423 */
2424
2425#ifdef CONFIG_NETFILTER
2426 netfilter_init();
2427#endif
cbeb321a 2428
c1f19b51
RC
2429#ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
2430 skb_timestamping_init();
2431#endif
2432
b3e19d92
NP
2433out:
2434 return err;
2435
2436out_mount:
2437 unregister_filesystem(&sock_fs_type);
2438out_fs:
2439 goto out;
1da177e4
LT
2440}
2441
77d76ea3
AK
2442core_initcall(sock_init); /* early initcall */
2443
1da177e4
LT
2444#ifdef CONFIG_PROC_FS
2445void socket_seq_show(struct seq_file *seq)
2446{
2447 int cpu;
2448 int counter = 0;
2449
6f912042 2450 for_each_possible_cpu(cpu)
89bddce5 2451 counter += per_cpu(sockets_in_use, cpu);
1da177e4
LT
2452
2453 /* It can be negative, by the way. 8) */
2454 if (counter < 0)
2455 counter = 0;
2456
2457 seq_printf(seq, "sockets: used %d\n", counter);
2458}
89bddce5 2459#endif /* CONFIG_PROC_FS */
1da177e4 2460
89bbfc95 2461#ifdef CONFIG_COMPAT
6b96018b
AB
2462static int do_siocgstamp(struct net *net, struct socket *sock,
2463 unsigned int cmd, struct compat_timeval __user *up)
7a229387 2464{
7a229387
AB
2465 mm_segment_t old_fs = get_fs();
2466 struct timeval ktv;
2467 int err;
2468
2469 set_fs(KERNEL_DS);
6b96018b 2470 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv);
7a229387
AB
2471 set_fs(old_fs);
2472 if (!err) {
2473 err = put_user(ktv.tv_sec, &up->tv_sec);
2474 err |= __put_user(ktv.tv_usec, &up->tv_usec);
2475 }
2476 return err;
2477}
2478
6b96018b
AB
2479static int do_siocgstampns(struct net *net, struct socket *sock,
2480 unsigned int cmd, struct compat_timespec __user *up)
7a229387 2481{
7a229387
AB
2482 mm_segment_t old_fs = get_fs();
2483 struct timespec kts;
2484 int err;
2485
2486 set_fs(KERNEL_DS);
6b96018b 2487 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts);
7a229387
AB
2488 set_fs(old_fs);
2489 if (!err) {
2490 err = put_user(kts.tv_sec, &up->tv_sec);
2491 err |= __put_user(kts.tv_nsec, &up->tv_nsec);
2492 }
2493 return err;
2494}
2495
6b96018b 2496static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32)
7a229387
AB
2497{
2498 struct ifreq __user *uifr;
2499 int err;
2500
2501 uifr = compat_alloc_user_space(sizeof(struct ifreq));
6b96018b 2502 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
7a229387
AB
2503 return -EFAULT;
2504
6b96018b 2505 err = dev_ioctl(net, SIOCGIFNAME, uifr);
7a229387
AB
2506 if (err)
2507 return err;
2508
6b96018b 2509 if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq)))
7a229387
AB
2510 return -EFAULT;
2511
2512 return 0;
2513}
2514
6b96018b 2515static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
7a229387 2516{
6b96018b 2517 struct compat_ifconf ifc32;
7a229387
AB
2518 struct ifconf ifc;
2519 struct ifconf __user *uifc;
6b96018b 2520 struct compat_ifreq __user *ifr32;
7a229387
AB
2521 struct ifreq __user *ifr;
2522 unsigned int i, j;
2523 int err;
2524
6b96018b 2525 if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
7a229387
AB
2526 return -EFAULT;
2527
2528 if (ifc32.ifcbuf == 0) {
2529 ifc32.ifc_len = 0;
2530 ifc.ifc_len = 0;
2531 ifc.ifc_req = NULL;
2532 uifc = compat_alloc_user_space(sizeof(struct ifconf));
2533 } else {
c6d409cf
ED
2534 size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) *
2535 sizeof(struct ifreq);
7a229387
AB
2536 uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
2537 ifc.ifc_len = len;
2538 ifr = ifc.ifc_req = (void __user *)(uifc + 1);
2539 ifr32 = compat_ptr(ifc32.ifcbuf);
c6d409cf 2540 for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) {
6b96018b 2541 if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq)))
7a229387
AB
2542 return -EFAULT;
2543 ifr++;
2544 ifr32++;
2545 }
2546 }
2547 if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
2548 return -EFAULT;
2549
6b96018b 2550 err = dev_ioctl(net, SIOCGIFCONF, uifc);
7a229387
AB
2551 if (err)
2552 return err;
2553
2554 if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
2555 return -EFAULT;
2556
2557 ifr = ifc.ifc_req;
2558 ifr32 = compat_ptr(ifc32.ifcbuf);
2559 for (i = 0, j = 0;
c6d409cf
ED
2560 i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len;
2561 i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) {
2562 if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq)))
7a229387
AB
2563 return -EFAULT;
2564 ifr32++;
2565 ifr++;
2566 }
2567
2568 if (ifc32.ifcbuf == 0) {
2569 /* Translate from 64-bit structure multiple to
2570 * a 32-bit one.
2571 */
2572 i = ifc.ifc_len;
6b96018b 2573 i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq));
7a229387
AB
2574 ifc32.ifc_len = i;
2575 } else {
2576 ifc32.ifc_len = i;
2577 }
6b96018b 2578 if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
7a229387
AB
2579 return -EFAULT;
2580
2581 return 0;
2582}
2583
6b96018b 2584static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
7a229387
AB
2585{
2586 struct ifreq __user *ifr;
7a229387
AB
2587 u32 data;
2588 void __user *datap;
2589
2590 ifr = compat_alloc_user_space(sizeof(*ifr));
7a229387
AB
2591
2592 if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2593 return -EFAULT;
2594
2595 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2596 return -EFAULT;
2597
2598 datap = compat_ptr(data);
2599 if (put_user(datap, &ifr->ifr_ifru.ifru_data))
2600 return -EFAULT;
2601
6b96018b 2602 return dev_ioctl(net, SIOCETHTOOL, ifr);
7a229387
AB
2603}
2604
7a50a240
AB
2605static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
2606{
2607 void __user *uptr;
2608 compat_uptr_t uptr32;
2609 struct ifreq __user *uifr;
2610
c6d409cf 2611 uifr = compat_alloc_user_space(sizeof(*uifr));
7a50a240
AB
2612 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2613 return -EFAULT;
2614
2615 if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
2616 return -EFAULT;
2617
2618 uptr = compat_ptr(uptr32);
2619
2620 if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc))
2621 return -EFAULT;
2622
2623 return dev_ioctl(net, SIOCWANDEV, uifr);
2624}
2625
6b96018b
AB
2626static int bond_ioctl(struct net *net, unsigned int cmd,
2627 struct compat_ifreq __user *ifr32)
7a229387
AB
2628{
2629 struct ifreq kifr;
2630 struct ifreq __user *uifr;
7a229387
AB
2631 mm_segment_t old_fs;
2632 int err;
2633 u32 data;
2634 void __user *datap;
2635
2636 switch (cmd) {
2637 case SIOCBONDENSLAVE:
2638 case SIOCBONDRELEASE:
2639 case SIOCBONDSETHWADDR:
2640 case SIOCBONDCHANGEACTIVE:
6b96018b 2641 if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq)))
7a229387
AB
2642 return -EFAULT;
2643
2644 old_fs = get_fs();
c6d409cf 2645 set_fs(KERNEL_DS);
6b96018b 2646 err = dev_ioctl(net, cmd, &kifr);
c6d409cf 2647 set_fs(old_fs);
7a229387
AB
2648
2649 return err;
2650 case SIOCBONDSLAVEINFOQUERY:
2651 case SIOCBONDINFOQUERY:
2652 uifr = compat_alloc_user_space(sizeof(*uifr));
2653 if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2654 return -EFAULT;
2655
2656 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2657 return -EFAULT;
2658
2659 datap = compat_ptr(data);
2660 if (put_user(datap, &uifr->ifr_ifru.ifru_data))
2661 return -EFAULT;
2662
6b96018b 2663 return dev_ioctl(net, cmd, uifr);
7a229387
AB
2664 default:
2665 return -EINVAL;
ccbd6a5a 2666 }
7a229387
AB
2667}
2668
6b96018b
AB
2669static int siocdevprivate_ioctl(struct net *net, unsigned int cmd,
2670 struct compat_ifreq __user *u_ifreq32)
7a229387
AB
2671{
2672 struct ifreq __user *u_ifreq64;
7a229387
AB
2673 char tmp_buf[IFNAMSIZ];
2674 void __user *data64;
2675 u32 data32;
2676
2677 if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
2678 IFNAMSIZ))
2679 return -EFAULT;
2680 if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
2681 return -EFAULT;
2682 data64 = compat_ptr(data32);
2683
2684 u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
2685
2686 /* Don't check these user accesses, just let that get trapped
2687 * in the ioctl handler instead.
2688 */
2689 if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
2690 IFNAMSIZ))
2691 return -EFAULT;
2692 if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
2693 return -EFAULT;
2694
6b96018b 2695 return dev_ioctl(net, cmd, u_ifreq64);
7a229387
AB
2696}
2697
6b96018b
AB
2698static int dev_ifsioc(struct net *net, struct socket *sock,
2699 unsigned int cmd, struct compat_ifreq __user *uifr32)
7a229387 2700{
a2116ed2 2701 struct ifreq __user *uifr;
7a229387
AB
2702 int err;
2703
a2116ed2
AB
2704 uifr = compat_alloc_user_space(sizeof(*uifr));
2705 if (copy_in_user(uifr, uifr32, sizeof(*uifr32)))
2706 return -EFAULT;
2707
2708 err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr);
2709
7a229387
AB
2710 if (!err) {
2711 switch (cmd) {
2712 case SIOCGIFFLAGS:
2713 case SIOCGIFMETRIC:
2714 case SIOCGIFMTU:
2715 case SIOCGIFMEM:
2716 case SIOCGIFHWADDR:
2717 case SIOCGIFINDEX:
2718 case SIOCGIFADDR:
2719 case SIOCGIFBRDADDR:
2720 case SIOCGIFDSTADDR:
2721 case SIOCGIFNETMASK:
fab2532b 2722 case SIOCGIFPFLAGS:
7a229387 2723 case SIOCGIFTXQLEN:
fab2532b
AB
2724 case SIOCGMIIPHY:
2725 case SIOCGMIIREG:
a2116ed2 2726 if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
7a229387
AB
2727 err = -EFAULT;
2728 break;
2729 }
2730 }
2731 return err;
2732}
2733
a2116ed2
AB
2734static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
2735 struct compat_ifreq __user *uifr32)
2736{
2737 struct ifreq ifr;
2738 struct compat_ifmap __user *uifmap32;
2739 mm_segment_t old_fs;
2740 int err;
2741
2742 uifmap32 = &uifr32->ifr_ifru.ifru_map;
2743 err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name));
2744 err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2745 err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2746 err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2747 err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq);
2748 err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma);
2749 err |= __get_user(ifr.ifr_map.port, &uifmap32->port);
2750 if (err)
2751 return -EFAULT;
2752
2753 old_fs = get_fs();
c6d409cf 2754 set_fs(KERNEL_DS);
a2116ed2 2755 err = dev_ioctl(net, cmd, (void __user *)&ifr);
c6d409cf 2756 set_fs(old_fs);
a2116ed2
AB
2757
2758 if (cmd == SIOCGIFMAP && !err) {
2759 err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
2760 err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2761 err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2762 err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2763 err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq);
2764 err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma);
2765 err |= __put_user(ifr.ifr_map.port, &uifmap32->port);
2766 if (err)
2767 err = -EFAULT;
2768 }
2769 return err;
2770}
2771
2772static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32)
2773{
2774 void __user *uptr;
2775 compat_uptr_t uptr32;
2776 struct ifreq __user *uifr;
2777
c6d409cf 2778 uifr = compat_alloc_user_space(sizeof(*uifr));
a2116ed2
AB
2779 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2780 return -EFAULT;
2781
2782 if (get_user(uptr32, &uifr32->ifr_data))
2783 return -EFAULT;
2784
2785 uptr = compat_ptr(uptr32);
2786
2787 if (put_user(uptr, &uifr->ifr_data))
2788 return -EFAULT;
2789
2790 return dev_ioctl(net, SIOCSHWTSTAMP, uifr);
2791}
2792
7a229387 2793struct rtentry32 {
c6d409cf 2794 u32 rt_pad1;
7a229387
AB
2795 struct sockaddr rt_dst; /* target address */
2796 struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */
2797 struct sockaddr rt_genmask; /* target network mask (IP) */
c6d409cf
ED
2798 unsigned short rt_flags;
2799 short rt_pad2;
2800 u32 rt_pad3;
2801 unsigned char rt_tos;
2802 unsigned char rt_class;
2803 short rt_pad4;
2804 short rt_metric; /* +1 for binary compatibility! */
7a229387 2805 /* char * */ u32 rt_dev; /* forcing the device at add */
c6d409cf
ED
2806 u32 rt_mtu; /* per route MTU/Window */
2807 u32 rt_window; /* Window clamping */
7a229387
AB
2808 unsigned short rt_irtt; /* Initial RTT */
2809};
2810
2811struct in6_rtmsg32 {
2812 struct in6_addr rtmsg_dst;
2813 struct in6_addr rtmsg_src;
2814 struct in6_addr rtmsg_gateway;
2815 u32 rtmsg_type;
2816 u16 rtmsg_dst_len;
2817 u16 rtmsg_src_len;
2818 u32 rtmsg_metric;
2819 u32 rtmsg_info;
2820 u32 rtmsg_flags;
2821 s32 rtmsg_ifindex;
2822};
2823
6b96018b
AB
2824static int routing_ioctl(struct net *net, struct socket *sock,
2825 unsigned int cmd, void __user *argp)
7a229387
AB
2826{
2827 int ret;
2828 void *r = NULL;
2829 struct in6_rtmsg r6;
2830 struct rtentry r4;
2831 char devname[16];
2832 u32 rtdev;
2833 mm_segment_t old_fs = get_fs();
2834
6b96018b
AB
2835 if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */
2836 struct in6_rtmsg32 __user *ur6 = argp;
c6d409cf 2837 ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst),
7a229387 2838 3 * sizeof(struct in6_addr));
c6d409cf
ED
2839 ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type));
2840 ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len));
2841 ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len));
2842 ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric));
2843 ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info));
2844 ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags));
2845 ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex));
7a229387
AB
2846
2847 r = (void *) &r6;
2848 } else { /* ipv4 */
6b96018b 2849 struct rtentry32 __user *ur4 = argp;
c6d409cf 2850 ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst),
7a229387 2851 3 * sizeof(struct sockaddr));
c6d409cf
ED
2852 ret |= __get_user(r4.rt_flags, &(ur4->rt_flags));
2853 ret |= __get_user(r4.rt_metric, &(ur4->rt_metric));
2854 ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu));
2855 ret |= __get_user(r4.rt_window, &(ur4->rt_window));
2856 ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt));
2857 ret |= __get_user(rtdev, &(ur4->rt_dev));
7a229387 2858 if (rtdev) {
c6d409cf 2859 ret |= copy_from_user(devname, compat_ptr(rtdev), 15);
7a229387
AB
2860 r4.rt_dev = devname; devname[15] = 0;
2861 } else
2862 r4.rt_dev = NULL;
2863
2864 r = (void *) &r4;
2865 }
2866
2867 if (ret) {
2868 ret = -EFAULT;
2869 goto out;
2870 }
2871
c6d409cf 2872 set_fs(KERNEL_DS);
6b96018b 2873 ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r);
c6d409cf 2874 set_fs(old_fs);
7a229387
AB
2875
2876out:
7a229387
AB
2877 return ret;
2878}
2879
2880/* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
2881 * for some operations; this forces use of the newer bridge-utils that
2882 * use compatiable ioctls
2883 */
6b96018b 2884static int old_bridge_ioctl(compat_ulong_t __user *argp)
7a229387 2885{
6b96018b 2886 compat_ulong_t tmp;
7a229387 2887
6b96018b 2888 if (get_user(tmp, argp))
7a229387
AB
2889 return -EFAULT;
2890 if (tmp == BRCTL_GET_VERSION)
2891 return BRCTL_VERSION + 1;
2892 return -EINVAL;
2893}
2894
6b96018b
AB
2895static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
2896 unsigned int cmd, unsigned long arg)
2897{
2898 void __user *argp = compat_ptr(arg);
2899 struct sock *sk = sock->sk;
2900 struct net *net = sock_net(sk);
7a229387 2901
6b96018b
AB
2902 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
2903 return siocdevprivate_ioctl(net, cmd, argp);
2904
2905 switch (cmd) {
2906 case SIOCSIFBR:
2907 case SIOCGIFBR:
2908 return old_bridge_ioctl(argp);
2909 case SIOCGIFNAME:
2910 return dev_ifname32(net, argp);
2911 case SIOCGIFCONF:
2912 return dev_ifconf(net, argp);
2913 case SIOCETHTOOL:
2914 return ethtool_ioctl(net, argp);
7a50a240
AB
2915 case SIOCWANDEV:
2916 return compat_siocwandev(net, argp);
a2116ed2
AB
2917 case SIOCGIFMAP:
2918 case SIOCSIFMAP:
2919 return compat_sioc_ifmap(net, cmd, argp);
6b96018b
AB
2920 case SIOCBONDENSLAVE:
2921 case SIOCBONDRELEASE:
2922 case SIOCBONDSETHWADDR:
2923 case SIOCBONDSLAVEINFOQUERY:
2924 case SIOCBONDINFOQUERY:
2925 case SIOCBONDCHANGEACTIVE:
2926 return bond_ioctl(net, cmd, argp);
2927 case SIOCADDRT:
2928 case SIOCDELRT:
2929 return routing_ioctl(net, sock, cmd, argp);
2930 case SIOCGSTAMP:
2931 return do_siocgstamp(net, sock, cmd, argp);
2932 case SIOCGSTAMPNS:
2933 return do_siocgstampns(net, sock, cmd, argp);
a2116ed2
AB
2934 case SIOCSHWTSTAMP:
2935 return compat_siocshwtstamp(net, argp);
6b96018b
AB
2936
2937 case FIOSETOWN:
2938 case SIOCSPGRP:
2939 case FIOGETOWN:
2940 case SIOCGPGRP:
2941 case SIOCBRADDBR:
2942 case SIOCBRDELBR:
2943 case SIOCGIFVLAN:
2944 case SIOCSIFVLAN:
2945 case SIOCADDDLCI:
2946 case SIOCDELDLCI:
2947 return sock_ioctl(file, cmd, arg);
2948
2949 case SIOCGIFFLAGS:
2950 case SIOCSIFFLAGS:
2951 case SIOCGIFMETRIC:
2952 case SIOCSIFMETRIC:
2953 case SIOCGIFMTU:
2954 case SIOCSIFMTU:
2955 case SIOCGIFMEM:
2956 case SIOCSIFMEM:
2957 case SIOCGIFHWADDR:
2958 case SIOCSIFHWADDR:
2959 case SIOCADDMULTI:
2960 case SIOCDELMULTI:
2961 case SIOCGIFINDEX:
6b96018b
AB
2962 case SIOCGIFADDR:
2963 case SIOCSIFADDR:
2964 case SIOCSIFHWBROADCAST:
6b96018b 2965 case SIOCDIFADDR:
6b96018b
AB
2966 case SIOCGIFBRDADDR:
2967 case SIOCSIFBRDADDR:
2968 case SIOCGIFDSTADDR:
2969 case SIOCSIFDSTADDR:
2970 case SIOCGIFNETMASK:
2971 case SIOCSIFNETMASK:
2972 case SIOCSIFPFLAGS:
2973 case SIOCGIFPFLAGS:
2974 case SIOCGIFTXQLEN:
2975 case SIOCSIFTXQLEN:
2976 case SIOCBRADDIF:
2977 case SIOCBRDELIF:
9177efd3
AB
2978 case SIOCSIFNAME:
2979 case SIOCGMIIPHY:
2980 case SIOCGMIIREG:
2981 case SIOCSMIIREG:
6b96018b 2982 return dev_ifsioc(net, sock, cmd, argp);
9177efd3 2983
6b96018b
AB
2984 case SIOCSARP:
2985 case SIOCGARP:
2986 case SIOCDARP:
6b96018b 2987 case SIOCATMARK:
9177efd3
AB
2988 return sock_do_ioctl(net, sock, cmd, arg);
2989 }
2990
2991 /* Prevent warning from compat_sys_ioctl, these always
2992 * result in -EINVAL in the native case anyway. */
2993 switch (cmd) {
2994 case SIOCRTMSG:
2995 case SIOCGIFCOUNT:
6b96018b
AB
2996 case SIOCSRARP:
2997 case SIOCGRARP:
2998 case SIOCDRARP:
9177efd3
AB
2999 case SIOCSIFLINK:
3000 case SIOCGIFSLAVE:
3001 case SIOCSIFSLAVE:
3002 return -EINVAL;
6b96018b
AB
3003 }
3004
3005 return -ENOIOCTLCMD;
3006}
7a229387 3007
89bbfc95 3008static long compat_sock_ioctl(struct file *file, unsigned cmd,
89bddce5 3009 unsigned long arg)
89bbfc95
SP
3010{
3011 struct socket *sock = file->private_data;
3012 int ret = -ENOIOCTLCMD;
87de87d5
DM
3013 struct sock *sk;
3014 struct net *net;
3015
3016 sk = sock->sk;
3017 net = sock_net(sk);
89bbfc95
SP
3018
3019 if (sock->ops->compat_ioctl)
3020 ret = sock->ops->compat_ioctl(sock, cmd, arg);
3021
87de87d5
DM
3022 if (ret == -ENOIOCTLCMD &&
3023 (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST))
3024 ret = compat_wext_handle_ioctl(net, cmd, arg);
3025
6b96018b
AB
3026 if (ret == -ENOIOCTLCMD)
3027 ret = compat_sock_ioctl_trans(file, sock, cmd, arg);
3028
89bbfc95
SP
3029 return ret;
3030}
3031#endif
3032
ac5a488e
SS
3033int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
3034{
3035 return sock->ops->bind(sock, addr, addrlen);
3036}
c6d409cf 3037EXPORT_SYMBOL(kernel_bind);
ac5a488e
SS
3038
3039int kernel_listen(struct socket *sock, int backlog)
3040{
3041 return sock->ops->listen(sock, backlog);
3042}
c6d409cf 3043EXPORT_SYMBOL(kernel_listen);
ac5a488e
SS
3044
3045int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
3046{
3047 struct sock *sk = sock->sk;
3048 int err;
3049
3050 err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol,
3051 newsock);
3052 if (err < 0)
3053 goto done;
3054
3055 err = sock->ops->accept(sock, *newsock, flags);
3056 if (err < 0) {
3057 sock_release(*newsock);
fa8705b0 3058 *newsock = NULL;
ac5a488e
SS
3059 goto done;
3060 }
3061
3062 (*newsock)->ops = sock->ops;
1b08534e 3063 __module_get((*newsock)->ops->owner);
ac5a488e
SS
3064
3065done:
3066 return err;
3067}
c6d409cf 3068EXPORT_SYMBOL(kernel_accept);
ac5a488e
SS
3069
3070int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
4768fbcb 3071 int flags)
ac5a488e
SS
3072{
3073 return sock->ops->connect(sock, addr, addrlen, flags);
3074}
c6d409cf 3075EXPORT_SYMBOL(kernel_connect);
ac5a488e
SS
3076
3077int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
3078 int *addrlen)
3079{
3080 return sock->ops->getname(sock, addr, addrlen, 0);
3081}
c6d409cf 3082EXPORT_SYMBOL(kernel_getsockname);
ac5a488e
SS
3083
3084int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
3085 int *addrlen)
3086{
3087 return sock->ops->getname(sock, addr, addrlen, 1);
3088}
c6d409cf 3089EXPORT_SYMBOL(kernel_getpeername);
ac5a488e
SS
3090
3091int kernel_getsockopt(struct socket *sock, int level, int optname,
3092 char *optval, int *optlen)
3093{
3094 mm_segment_t oldfs = get_fs();
fb8621bb
NK
3095 char __user *uoptval;
3096 int __user *uoptlen;
ac5a488e
SS
3097 int err;
3098
fb8621bb
NK
3099 uoptval = (char __user __force *) optval;
3100 uoptlen = (int __user __force *) optlen;
3101
ac5a488e
SS
3102 set_fs(KERNEL_DS);
3103 if (level == SOL_SOCKET)
fb8621bb 3104 err = sock_getsockopt(sock, level, optname, uoptval, uoptlen);
ac5a488e 3105 else
fb8621bb
NK
3106 err = sock->ops->getsockopt(sock, level, optname, uoptval,
3107 uoptlen);
ac5a488e
SS
3108 set_fs(oldfs);
3109 return err;
3110}
c6d409cf 3111EXPORT_SYMBOL(kernel_getsockopt);
ac5a488e
SS
3112
3113int kernel_setsockopt(struct socket *sock, int level, int optname,
b7058842 3114 char *optval, unsigned int optlen)
ac5a488e
SS
3115{
3116 mm_segment_t oldfs = get_fs();
fb8621bb 3117 char __user *uoptval;
ac5a488e
SS
3118 int err;
3119
fb8621bb
NK
3120 uoptval = (char __user __force *) optval;
3121
ac5a488e
SS
3122 set_fs(KERNEL_DS);
3123 if (level == SOL_SOCKET)
fb8621bb 3124 err = sock_setsockopt(sock, level, optname, uoptval, optlen);
ac5a488e 3125 else
fb8621bb 3126 err = sock->ops->setsockopt(sock, level, optname, uoptval,
ac5a488e
SS
3127 optlen);
3128 set_fs(oldfs);
3129 return err;
3130}
c6d409cf 3131EXPORT_SYMBOL(kernel_setsockopt);
ac5a488e
SS
3132
3133int kernel_sendpage(struct socket *sock, struct page *page, int offset,
3134 size_t size, int flags)
3135{
f8451725
HX
3136 sock_update_classid(sock->sk);
3137
ac5a488e
SS
3138 if (sock->ops->sendpage)
3139 return sock->ops->sendpage(sock, page, offset, size, flags);
3140
3141 return sock_no_sendpage(sock, page, offset, size, flags);
3142}
c6d409cf 3143EXPORT_SYMBOL(kernel_sendpage);
ac5a488e
SS
3144
3145int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
3146{
3147 mm_segment_t oldfs = get_fs();
3148 int err;
3149
3150 set_fs(KERNEL_DS);
3151 err = sock->ops->ioctl(sock, cmd, arg);
3152 set_fs(oldfs);
3153
3154 return err;
3155}
c6d409cf 3156EXPORT_SYMBOL(kernel_sock_ioctl);
ac5a488e 3157
91cf45f0
TM
3158int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
3159{
3160 return sock->ops->shutdown(sock, how);
3161}
91cf45f0 3162EXPORT_SYMBOL(kernel_sock_shutdown);