Commit | Line | Data |
---|---|---|
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 | 72 | #include <linux/if_bridge.h> |
20380731 ACM |
73 | #include <linux/if_frad.h> |
74 | #include <linux/if_vlan.h> | |
408eccce | 75 | #include <linux/ptp_classify.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> |
600e1779 | 91 | #include <linux/xattr.h> |
1da177e4 LT |
92 | |
93 | #include <asm/uaccess.h> | |
94 | #include <asm/unistd.h> | |
95 | ||
96 | #include <net/compat.h> | |
87de87d5 | 97 | #include <net/wext.h> |
f8451725 | 98 | #include <net/cls_cgroup.h> |
1da177e4 LT |
99 | |
100 | #include <net/sock.h> | |
101 | #include <linux/netfilter.h> | |
102 | ||
6b96018b AB |
103 | #include <linux/if_tun.h> |
104 | #include <linux/ipv6_route.h> | |
105 | #include <linux/route.h> | |
6b96018b AB |
106 | #include <linux/sockios.h> |
107 | #include <linux/atalk.h> | |
076bb0c8 | 108 | #include <net/busy_poll.h> |
f24b9be5 | 109 | #include <linux/errqueue.h> |
06021292 | 110 | |
e0d1095a | 111 | #ifdef CONFIG_NET_RX_BUSY_POLL |
64b0dc51 ET |
112 | unsigned int sysctl_net_busy_read __read_mostly; |
113 | unsigned int sysctl_net_busy_poll __read_mostly; | |
06021292 | 114 | #endif |
6b96018b | 115 | |
027445c3 BP |
116 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
117 | unsigned long nr_segs, loff_t pos); | |
118 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
119 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 120 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
121 | |
122 | static int sock_close(struct inode *inode, struct file *file); | |
123 | static unsigned int sock_poll(struct file *file, | |
124 | struct poll_table_struct *wait); | |
89bddce5 | 125 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
126 | #ifdef CONFIG_COMPAT |
127 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 128 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 129 | #endif |
1da177e4 | 130 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
131 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
132 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 133 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 134 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 135 | unsigned int flags); |
1da177e4 | 136 | |
1da177e4 LT |
137 | /* |
138 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
139 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
140 | */ | |
141 | ||
da7071d7 | 142 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
143 | .owner = THIS_MODULE, |
144 | .llseek = no_llseek, | |
145 | .aio_read = sock_aio_read, | |
146 | .aio_write = sock_aio_write, | |
147 | .poll = sock_poll, | |
148 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
149 | #ifdef CONFIG_COMPAT |
150 | .compat_ioctl = compat_sock_ioctl, | |
151 | #endif | |
1da177e4 | 152 | .mmap = sock_mmap, |
1da177e4 LT |
153 | .release = sock_close, |
154 | .fasync = sock_fasync, | |
5274f052 JA |
155 | .sendpage = sock_sendpage, |
156 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 157 | .splice_read = sock_splice_read, |
1da177e4 LT |
158 | }; |
159 | ||
160 | /* | |
161 | * The protocol list. Each protocol is registered in here. | |
162 | */ | |
163 | ||
1da177e4 | 164 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 165 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 166 | |
1da177e4 LT |
167 | /* |
168 | * Statistics counters of the socket lists | |
169 | */ | |
170 | ||
c6d409cf | 171 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
172 | |
173 | /* | |
89bddce5 SH |
174 | * Support routines. |
175 | * Move socket addresses back and forth across the kernel/user | |
176 | * divide and look after the messy bits. | |
1da177e4 LT |
177 | */ |
178 | ||
1da177e4 LT |
179 | /** |
180 | * move_addr_to_kernel - copy a socket address into kernel space | |
181 | * @uaddr: Address in user space | |
182 | * @kaddr: Address in kernel space | |
183 | * @ulen: Length in user space | |
184 | * | |
185 | * The address is copied into kernel space. If the provided address is | |
186 | * too long an error code of -EINVAL is returned. If the copy gives | |
187 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
188 | */ | |
189 | ||
43db362d | 190 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 191 | { |
230b1839 | 192 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 193 | return -EINVAL; |
89bddce5 | 194 | if (ulen == 0) |
1da177e4 | 195 | return 0; |
89bddce5 | 196 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 197 | return -EFAULT; |
3ec3b2fb | 198 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
199 | } |
200 | ||
201 | /** | |
202 | * move_addr_to_user - copy an address to user space | |
203 | * @kaddr: kernel space address | |
204 | * @klen: length of address in kernel | |
205 | * @uaddr: user space address | |
206 | * @ulen: pointer to user length field | |
207 | * | |
208 | * The value pointed to by ulen on entry is the buffer length available. | |
209 | * This is overwritten with the buffer space used. -EINVAL is returned | |
210 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
211 | * is returned if either the buffer or the length field are not | |
212 | * accessible. | |
213 | * After copying the data up to the limit the user specifies, the true | |
214 | * length of the data is written over the length limit the user | |
215 | * specified. Zero is returned for a success. | |
216 | */ | |
89bddce5 | 217 | |
43db362d | 218 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 219 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
220 | { |
221 | int err; | |
222 | int len; | |
223 | ||
68c6beb3 | 224 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
89bddce5 SH |
225 | err = get_user(len, ulen); |
226 | if (err) | |
1da177e4 | 227 | return err; |
89bddce5 SH |
228 | if (len > klen) |
229 | len = klen; | |
68c6beb3 | 230 | if (len < 0) |
1da177e4 | 231 | return -EINVAL; |
89bddce5 | 232 | if (len) { |
d6fe3945 SG |
233 | if (audit_sockaddr(klen, kaddr)) |
234 | return -ENOMEM; | |
89bddce5 | 235 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
236 | return -EFAULT; |
237 | } | |
238 | /* | |
89bddce5 SH |
239 | * "fromlen shall refer to the value before truncation.." |
240 | * 1003.1g | |
1da177e4 LT |
241 | */ |
242 | return __put_user(klen, ulen); | |
243 | } | |
244 | ||
e18b890b | 245 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
246 | |
247 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
248 | { | |
249 | struct socket_alloc *ei; | |
eaefd110 | 250 | struct socket_wq *wq; |
89bddce5 | 251 | |
e94b1766 | 252 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
253 | if (!ei) |
254 | return NULL; | |
eaefd110 ED |
255 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
256 | if (!wq) { | |
43815482 ED |
257 | kmem_cache_free(sock_inode_cachep, ei); |
258 | return NULL; | |
259 | } | |
eaefd110 ED |
260 | init_waitqueue_head(&wq->wait); |
261 | wq->fasync_list = NULL; | |
262 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 263 | |
1da177e4 LT |
264 | ei->socket.state = SS_UNCONNECTED; |
265 | ei->socket.flags = 0; | |
266 | ei->socket.ops = NULL; | |
267 | ei->socket.sk = NULL; | |
268 | ei->socket.file = NULL; | |
1da177e4 LT |
269 | |
270 | return &ei->vfs_inode; | |
271 | } | |
272 | ||
273 | static void sock_destroy_inode(struct inode *inode) | |
274 | { | |
43815482 | 275 | struct socket_alloc *ei; |
eaefd110 | 276 | struct socket_wq *wq; |
43815482 ED |
277 | |
278 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 279 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 280 | kfree_rcu(wq, rcu); |
43815482 | 281 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
282 | } |
283 | ||
51cc5068 | 284 | static void init_once(void *foo) |
1da177e4 | 285 | { |
89bddce5 | 286 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 287 | |
a35afb83 | 288 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 289 | } |
89bddce5 | 290 | |
1da177e4 LT |
291 | static int init_inodecache(void) |
292 | { | |
293 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
294 | sizeof(struct socket_alloc), |
295 | 0, | |
296 | (SLAB_HWCACHE_ALIGN | | |
297 | SLAB_RECLAIM_ACCOUNT | | |
298 | SLAB_MEM_SPREAD), | |
20c2df83 | 299 | init_once); |
1da177e4 LT |
300 | if (sock_inode_cachep == NULL) |
301 | return -ENOMEM; | |
302 | return 0; | |
303 | } | |
304 | ||
b87221de | 305 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
306 | .alloc_inode = sock_alloc_inode, |
307 | .destroy_inode = sock_destroy_inode, | |
308 | .statfs = simple_statfs, | |
1da177e4 LT |
309 | }; |
310 | ||
c23fbb6b ED |
311 | /* |
312 | * sockfs_dname() is called from d_path(). | |
313 | */ | |
314 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
315 | { | |
316 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
317 | dentry->d_inode->i_ino); | |
318 | } | |
319 | ||
3ba13d17 | 320 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 321 | .d_dname = sockfs_dname, |
1da177e4 LT |
322 | }; |
323 | ||
c74a1cbb AV |
324 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
325 | int flags, const char *dev_name, void *data) | |
326 | { | |
327 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
328 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
329 | } | |
330 | ||
331 | static struct vfsmount *sock_mnt __read_mostly; | |
332 | ||
333 | static struct file_system_type sock_fs_type = { | |
334 | .name = "sockfs", | |
335 | .mount = sockfs_mount, | |
336 | .kill_sb = kill_anon_super, | |
337 | }; | |
338 | ||
1da177e4 LT |
339 | /* |
340 | * Obtains the first available file descriptor and sets it up for use. | |
341 | * | |
39d8c1b6 DM |
342 | * These functions create file structures and maps them to fd space |
343 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
344 | * and file struct implicitly stored in sock->file. |
345 | * Note that another thread may close file descriptor before we return | |
346 | * from this function. We use the fact that now we do not refer | |
347 | * to socket after mapping. If one day we will need it, this | |
348 | * function will increment ref. count on file by 1. | |
349 | * | |
350 | * In any case returned fd MAY BE not valid! | |
351 | * This race condition is unavoidable | |
352 | * with shared fd spaces, we cannot solve it inside kernel, | |
353 | * but we take care of internal coherence yet. | |
354 | */ | |
355 | ||
aab174f0 | 356 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 357 | { |
7cbe66b6 | 358 | struct qstr name = { .name = "" }; |
2c48b9c4 | 359 | struct path path; |
7cbe66b6 | 360 | struct file *file; |
1da177e4 | 361 | |
600e1779 MY |
362 | if (dname) { |
363 | name.name = dname; | |
364 | name.len = strlen(name.name); | |
365 | } else if (sock->sk) { | |
366 | name.name = sock->sk->sk_prot_creator->name; | |
367 | name.len = strlen(name.name); | |
368 | } | |
4b936885 | 369 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
370 | if (unlikely(!path.dentry)) |
371 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 372 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 373 | |
2c48b9c4 | 374 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
39d8c1b6 | 375 | |
2c48b9c4 | 376 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 377 | &socket_file_ops); |
39b65252 | 378 | if (unlikely(IS_ERR(file))) { |
cc3808f8 | 379 | /* drop dentry, keep inode */ |
7de9c6ee | 380 | ihold(path.dentry->d_inode); |
2c48b9c4 | 381 | path_put(&path); |
39b65252 | 382 | return file; |
cc3808f8 AV |
383 | } |
384 | ||
385 | sock->file = file; | |
77d27200 | 386 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 387 | file->private_data = sock; |
28407630 | 388 | return file; |
39d8c1b6 | 389 | } |
56b31d1c | 390 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 391 | |
56b31d1c | 392 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
393 | { |
394 | struct file *newfile; | |
28407630 AV |
395 | int fd = get_unused_fd_flags(flags); |
396 | if (unlikely(fd < 0)) | |
397 | return fd; | |
39d8c1b6 | 398 | |
aab174f0 | 399 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 400 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 401 | fd_install(fd, newfile); |
28407630 AV |
402 | return fd; |
403 | } | |
7cbe66b6 | 404 | |
28407630 AV |
405 | put_unused_fd(fd); |
406 | return PTR_ERR(newfile); | |
1da177e4 LT |
407 | } |
408 | ||
406a3c63 | 409 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 410 | { |
6cb153ca BL |
411 | if (file->f_op == &socket_file_ops) |
412 | return file->private_data; /* set in sock_map_fd */ | |
413 | ||
23bb80d2 ED |
414 | *err = -ENOTSOCK; |
415 | return NULL; | |
6cb153ca | 416 | } |
406a3c63 | 417 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 418 | |
1da177e4 | 419 | /** |
c6d409cf | 420 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
421 | * @fd: file handle |
422 | * @err: pointer to an error code return | |
423 | * | |
424 | * The file handle passed in is locked and the socket it is bound | |
425 | * too is returned. If an error occurs the err pointer is overwritten | |
426 | * with a negative errno code and NULL is returned. The function checks | |
427 | * for both invalid handles and passing a handle which is not a socket. | |
428 | * | |
429 | * On a success the socket object pointer is returned. | |
430 | */ | |
431 | ||
432 | struct socket *sockfd_lookup(int fd, int *err) | |
433 | { | |
434 | struct file *file; | |
1da177e4 LT |
435 | struct socket *sock; |
436 | ||
89bddce5 SH |
437 | file = fget(fd); |
438 | if (!file) { | |
1da177e4 LT |
439 | *err = -EBADF; |
440 | return NULL; | |
441 | } | |
89bddce5 | 442 | |
6cb153ca BL |
443 | sock = sock_from_file(file, err); |
444 | if (!sock) | |
1da177e4 | 445 | fput(file); |
6cb153ca BL |
446 | return sock; |
447 | } | |
c6d409cf | 448 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 449 | |
6cb153ca BL |
450 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
451 | { | |
00e188ef | 452 | struct fd f = fdget(fd); |
6cb153ca BL |
453 | struct socket *sock; |
454 | ||
3672558c | 455 | *err = -EBADF; |
00e188ef AV |
456 | if (f.file) { |
457 | sock = sock_from_file(f.file, err); | |
458 | if (likely(sock)) { | |
459 | *fput_needed = f.flags; | |
6cb153ca | 460 | return sock; |
00e188ef AV |
461 | } |
462 | fdput(f); | |
1da177e4 | 463 | } |
6cb153ca | 464 | return NULL; |
1da177e4 LT |
465 | } |
466 | ||
600e1779 MY |
467 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
468 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
469 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
470 | static ssize_t sockfs_getxattr(struct dentry *dentry, | |
471 | const char *name, void *value, size_t size) | |
472 | { | |
473 | const char *proto_name; | |
474 | size_t proto_size; | |
475 | int error; | |
476 | ||
477 | error = -ENODATA; | |
478 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { | |
479 | proto_name = dentry->d_name.name; | |
480 | proto_size = strlen(proto_name); | |
481 | ||
482 | if (value) { | |
483 | error = -ERANGE; | |
484 | if (proto_size + 1 > size) | |
485 | goto out; | |
486 | ||
487 | strncpy(value, proto_name, proto_size + 1); | |
488 | } | |
489 | error = proto_size + 1; | |
490 | } | |
491 | ||
492 | out: | |
493 | return error; | |
494 | } | |
495 | ||
496 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, | |
497 | size_t size) | |
498 | { | |
499 | ssize_t len; | |
500 | ssize_t used = 0; | |
501 | ||
502 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); | |
503 | if (len < 0) | |
504 | return len; | |
505 | used += len; | |
506 | if (buffer) { | |
507 | if (size < used) | |
508 | return -ERANGE; | |
509 | buffer += len; | |
510 | } | |
511 | ||
512 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
513 | used += len; | |
514 | if (buffer) { | |
515 | if (size < used) | |
516 | return -ERANGE; | |
517 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
518 | buffer += len; | |
519 | } | |
520 | ||
521 | return used; | |
522 | } | |
523 | ||
524 | static const struct inode_operations sockfs_inode_ops = { | |
525 | .getxattr = sockfs_getxattr, | |
526 | .listxattr = sockfs_listxattr, | |
527 | }; | |
528 | ||
1da177e4 LT |
529 | /** |
530 | * sock_alloc - allocate a socket | |
89bddce5 | 531 | * |
1da177e4 LT |
532 | * Allocate a new inode and socket object. The two are bound together |
533 | * and initialised. The socket is then returned. If we are out of inodes | |
534 | * NULL is returned. | |
535 | */ | |
536 | ||
537 | static struct socket *sock_alloc(void) | |
538 | { | |
89bddce5 SH |
539 | struct inode *inode; |
540 | struct socket *sock; | |
1da177e4 | 541 | |
a209dfc7 | 542 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
543 | if (!inode) |
544 | return NULL; | |
545 | ||
546 | sock = SOCKET_I(inode); | |
547 | ||
29a020d3 | 548 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 549 | inode->i_ino = get_next_ino(); |
89bddce5 | 550 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
551 | inode->i_uid = current_fsuid(); |
552 | inode->i_gid = current_fsgid(); | |
600e1779 | 553 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 554 | |
19e8d69c | 555 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
556 | return sock; |
557 | } | |
558 | ||
1da177e4 LT |
559 | /** |
560 | * sock_release - close a socket | |
561 | * @sock: socket to close | |
562 | * | |
563 | * The socket is released from the protocol stack if it has a release | |
564 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 565 | * an inode not a file. |
1da177e4 | 566 | */ |
89bddce5 | 567 | |
1da177e4 LT |
568 | void sock_release(struct socket *sock) |
569 | { | |
570 | if (sock->ops) { | |
571 | struct module *owner = sock->ops->owner; | |
572 | ||
573 | sock->ops->release(sock); | |
574 | sock->ops = NULL; | |
575 | module_put(owner); | |
576 | } | |
577 | ||
eaefd110 | 578 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
3410f22e | 579 | pr_err("%s: fasync list not empty!\n", __func__); |
1da177e4 | 580 | |
b09e786b MP |
581 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
582 | return; | |
583 | ||
19e8d69c | 584 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
585 | if (!sock->file) { |
586 | iput(SOCK_INODE(sock)); | |
587 | return; | |
588 | } | |
89bddce5 | 589 | sock->file = NULL; |
1da177e4 | 590 | } |
c6d409cf | 591 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 592 | |
67cc0d40 | 593 | void __sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags) |
20d49473 | 594 | { |
140c55d4 ED |
595 | u8 flags = *tx_flags; |
596 | ||
b9f40e21 | 597 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
140c55d4 ED |
598 | flags |= SKBTX_HW_TSTAMP; |
599 | ||
b9f40e21 | 600 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
140c55d4 ED |
601 | flags |= SKBTX_SW_TSTAMP; |
602 | ||
e7fd2885 | 603 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED) |
140c55d4 ED |
604 | flags |= SKBTX_SCHED_TSTAMP; |
605 | ||
e1c8a607 | 606 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK) |
140c55d4 | 607 | flags |= SKBTX_ACK_TSTAMP; |
e7fd2885 | 608 | |
140c55d4 | 609 | *tx_flags = flags; |
20d49473 | 610 | } |
67cc0d40 | 611 | EXPORT_SYMBOL(__sock_tx_timestamp); |
20d49473 | 612 | |
228e548e AB |
613 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
614 | struct msghdr *msg, size_t size) | |
1da177e4 | 615 | { |
1da177e4 LT |
616 | return sock->ops->sendmsg(iocb, sock, msg, size); |
617 | } | |
618 | ||
228e548e AB |
619 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
620 | struct msghdr *msg, size_t size) | |
621 | { | |
622 | int err = security_socket_sendmsg(sock, msg, size); | |
623 | ||
624 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
625 | } | |
626 | ||
0cf00c6f GZ |
627 | static int do_sock_sendmsg(struct socket *sock, struct msghdr *msg, |
628 | size_t size, bool nosec) | |
1da177e4 LT |
629 | { |
630 | struct kiocb iocb; | |
1da177e4 LT |
631 | int ret; |
632 | ||
633 | init_sync_kiocb(&iocb, NULL); | |
0cf00c6f GZ |
634 | ret = nosec ? __sock_sendmsg_nosec(&iocb, sock, msg, size) : |
635 | __sock_sendmsg(&iocb, sock, msg, size); | |
1da177e4 LT |
636 | if (-EIOCBQUEUED == ret) |
637 | ret = wait_on_sync_kiocb(&iocb); | |
638 | return ret; | |
639 | } | |
0cf00c6f GZ |
640 | |
641 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
642 | { | |
643 | return do_sock_sendmsg(sock, msg, size, false); | |
644 | } | |
c6d409cf | 645 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 646 | |
894dc24c | 647 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e | 648 | { |
0cf00c6f | 649 | return do_sock_sendmsg(sock, msg, size, true); |
228e548e AB |
650 | } |
651 | ||
1da177e4 LT |
652 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
653 | struct kvec *vec, size_t num, size_t size) | |
654 | { | |
655 | mm_segment_t oldfs = get_fs(); | |
656 | int result; | |
657 | ||
658 | set_fs(KERNEL_DS); | |
659 | /* | |
660 | * the following is safe, since for compiler definitions of kvec and | |
661 | * iovec are identical, yielding the same in-core layout and alignment | |
662 | */ | |
c0371da6 | 663 | iov_iter_init(&msg->msg_iter, WRITE, (struct iovec *)vec, num, size); |
1da177e4 LT |
664 | result = sock_sendmsg(sock, msg, size); |
665 | set_fs(oldfs); | |
666 | return result; | |
667 | } | |
c6d409cf | 668 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 669 | |
92f37fd2 ED |
670 | /* |
671 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
672 | */ | |
673 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
674 | struct sk_buff *skb) | |
675 | { | |
20d49473 | 676 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
f24b9be5 | 677 | struct scm_timestamping tss; |
20d49473 PO |
678 | int empty = 1; |
679 | struct skb_shared_hwtstamps *shhwtstamps = | |
680 | skb_hwtstamps(skb); | |
681 | ||
682 | /* Race occurred between timestamp enabling and packet | |
683 | receiving. Fill in the current time for now. */ | |
684 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
685 | __net_timestamp(skb); | |
686 | ||
687 | if (need_software_tstamp) { | |
688 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
689 | struct timeval tv; | |
690 | skb_get_timestamp(skb, &tv); | |
691 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
692 | sizeof(tv), &tv); | |
693 | } else { | |
f24b9be5 WB |
694 | struct timespec ts; |
695 | skb_get_timestampns(skb, &ts); | |
20d49473 | 696 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
f24b9be5 | 697 | sizeof(ts), &ts); |
20d49473 PO |
698 | } |
699 | } | |
700 | ||
f24b9be5 | 701 | memset(&tss, 0, sizeof(tss)); |
c199105d | 702 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
f24b9be5 | 703 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
20d49473 | 704 | empty = 0; |
4d276eb6 | 705 | if (shhwtstamps && |
b9f40e21 | 706 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
f24b9be5 | 707 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) |
4d276eb6 | 708 | empty = 0; |
20d49473 PO |
709 | if (!empty) |
710 | put_cmsg(msg, SOL_SOCKET, | |
f24b9be5 | 711 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
92f37fd2 | 712 | } |
7c81fd8b ACM |
713 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
714 | ||
6e3e939f JB |
715 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
716 | struct sk_buff *skb) | |
717 | { | |
718 | int ack; | |
719 | ||
720 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
721 | return; | |
722 | if (!skb->wifi_acked_valid) | |
723 | return; | |
724 | ||
725 | ack = skb->wifi_acked; | |
726 | ||
727 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
728 | } | |
729 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
730 | ||
11165f14 | 731 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
732 | struct sk_buff *skb) | |
3b885787 NH |
733 | { |
734 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
735 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
736 | sizeof(__u32), &skb->dropcount); | |
737 | } | |
738 | ||
767dd033 | 739 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
740 | struct sk_buff *skb) |
741 | { | |
742 | sock_recv_timestamp(msg, sk, skb); | |
743 | sock_recv_drops(msg, sk, skb); | |
744 | } | |
767dd033 | 745 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 746 | |
a2e27255 ACM |
747 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
748 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 749 | { |
1da177e4 LT |
750 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
751 | } | |
752 | ||
a2e27255 ACM |
753 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
754 | struct msghdr *msg, size_t size, int flags) | |
755 | { | |
756 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
757 | ||
758 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
759 | } | |
760 | ||
89bddce5 | 761 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
762 | size_t size, int flags) |
763 | { | |
764 | struct kiocb iocb; | |
1da177e4 LT |
765 | int ret; |
766 | ||
89bddce5 | 767 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
768 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); |
769 | if (-EIOCBQUEUED == ret) | |
770 | ret = wait_on_sync_kiocb(&iocb); | |
771 | return ret; | |
772 | } | |
c6d409cf | 773 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 774 | |
a2e27255 ACM |
775 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
776 | size_t size, int flags) | |
777 | { | |
778 | struct kiocb iocb; | |
a2e27255 ACM |
779 | int ret; |
780 | ||
781 | init_sync_kiocb(&iocb, NULL); | |
a2e27255 ACM |
782 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); |
783 | if (-EIOCBQUEUED == ret) | |
784 | ret = wait_on_sync_kiocb(&iocb); | |
785 | return ret; | |
786 | } | |
787 | ||
c1249c0a ML |
788 | /** |
789 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
790 | * @sock: The socket to receive the message from | |
791 | * @msg: Received message | |
792 | * @vec: Input s/g array for message data | |
793 | * @num: Size of input s/g array | |
794 | * @size: Number of bytes to read | |
795 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
796 | * | |
797 | * On return the msg structure contains the scatter/gather array passed in the | |
798 | * vec argument. The array is modified so that it consists of the unfilled | |
799 | * portion of the original array. | |
800 | * | |
801 | * The returned value is the total number of bytes received, or an error. | |
802 | */ | |
89bddce5 SH |
803 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
804 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
805 | { |
806 | mm_segment_t oldfs = get_fs(); | |
807 | int result; | |
808 | ||
809 | set_fs(KERNEL_DS); | |
810 | /* | |
811 | * the following is safe, since for compiler definitions of kvec and | |
812 | * iovec are identical, yielding the same in-core layout and alignment | |
813 | */ | |
c0371da6 | 814 | iov_iter_init(&msg->msg_iter, READ, (struct iovec *)vec, num, size); |
1da177e4 LT |
815 | result = sock_recvmsg(sock, msg, size, flags); |
816 | set_fs(oldfs); | |
817 | return result; | |
818 | } | |
c6d409cf | 819 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 | 820 | |
ce1d4d3e CH |
821 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
822 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 823 | { |
1da177e4 LT |
824 | struct socket *sock; |
825 | int flags; | |
826 | ||
ce1d4d3e CH |
827 | sock = file->private_data; |
828 | ||
35f9c09f ED |
829 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
830 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
831 | flags |= more; | |
ce1d4d3e | 832 | |
e6949583 | 833 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 834 | } |
1da177e4 | 835 | |
9c55e01c | 836 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 837 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
838 | unsigned int flags) |
839 | { | |
840 | struct socket *sock = file->private_data; | |
841 | ||
997b37da RDC |
842 | if (unlikely(!sock->ops->splice_read)) |
843 | return -EINVAL; | |
844 | ||
9c55e01c JA |
845 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
846 | } | |
847 | ||
ce1d4d3e | 848 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
849 | struct file *file, const struct iovec *iov, |
850 | unsigned long nr_segs) | |
ce1d4d3e CH |
851 | { |
852 | struct socket *sock = file->private_data; | |
1da177e4 | 853 | |
ce1d4d3e CH |
854 | msg->msg_name = NULL; |
855 | msg->msg_namelen = 0; | |
856 | msg->msg_control = NULL; | |
857 | msg->msg_controllen = 0; | |
66c1a12c | 858 | iov_iter_init(&msg->msg_iter, READ, iov, nr_segs, iocb->ki_nbytes); |
ce1d4d3e CH |
859 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
860 | ||
66c1a12c | 861 | return __sock_recvmsg(iocb, sock, msg, iocb->ki_nbytes, msg->msg_flags); |
ce1d4d3e CH |
862 | } |
863 | ||
027445c3 BP |
864 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
865 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e | 866 | { |
7cc05662 | 867 | struct msghdr msg; |
ce1d4d3e | 868 | |
1da177e4 LT |
869 | if (pos != 0) |
870 | return -ESPIPE; | |
027445c3 | 871 | |
73a7075e | 872 | if (iocb->ki_nbytes == 0) /* Match SYS5 behaviour */ |
1da177e4 LT |
873 | return 0; |
874 | ||
7cc05662 | 875 | return do_sock_read(&msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
876 | } |
877 | ||
ce1d4d3e | 878 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
879 | struct file *file, const struct iovec *iov, |
880 | unsigned long nr_segs) | |
1da177e4 | 881 | { |
ce1d4d3e | 882 | struct socket *sock = file->private_data; |
1da177e4 | 883 | |
ce1d4d3e CH |
884 | msg->msg_name = NULL; |
885 | msg->msg_namelen = 0; | |
886 | msg->msg_control = NULL; | |
887 | msg->msg_controllen = 0; | |
66c1a12c | 888 | iov_iter_init(&msg->msg_iter, WRITE, iov, nr_segs, iocb->ki_nbytes); |
ce1d4d3e CH |
889 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
890 | if (sock->type == SOCK_SEQPACKET) | |
891 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 892 | |
66c1a12c | 893 | return __sock_sendmsg(iocb, sock, msg, iocb->ki_nbytes); |
1da177e4 LT |
894 | } |
895 | ||
027445c3 BP |
896 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
897 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e | 898 | { |
7cc05662 | 899 | struct msghdr msg; |
1da177e4 | 900 | |
ce1d4d3e CH |
901 | if (pos != 0) |
902 | return -ESPIPE; | |
027445c3 | 903 | |
7cc05662 | 904 | return do_sock_write(&msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
905 | } |
906 | ||
1da177e4 LT |
907 | /* |
908 | * Atomic setting of ioctl hooks to avoid race | |
909 | * with module unload. | |
910 | */ | |
911 | ||
4a3e2f71 | 912 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 913 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 914 | |
881d966b | 915 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 916 | { |
4a3e2f71 | 917 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 918 | br_ioctl_hook = hook; |
4a3e2f71 | 919 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
920 | } |
921 | EXPORT_SYMBOL(brioctl_set); | |
922 | ||
4a3e2f71 | 923 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 924 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 925 | |
881d966b | 926 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 927 | { |
4a3e2f71 | 928 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 929 | vlan_ioctl_hook = hook; |
4a3e2f71 | 930 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
931 | } |
932 | EXPORT_SYMBOL(vlan_ioctl_set); | |
933 | ||
4a3e2f71 | 934 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 935 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 936 | |
89bddce5 | 937 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 938 | { |
4a3e2f71 | 939 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 940 | dlci_ioctl_hook = hook; |
4a3e2f71 | 941 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
942 | } |
943 | EXPORT_SYMBOL(dlci_ioctl_set); | |
944 | ||
6b96018b AB |
945 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
946 | unsigned int cmd, unsigned long arg) | |
947 | { | |
948 | int err; | |
949 | void __user *argp = (void __user *)arg; | |
950 | ||
951 | err = sock->ops->ioctl(sock, cmd, arg); | |
952 | ||
953 | /* | |
954 | * If this ioctl is unknown try to hand it down | |
955 | * to the NIC driver. | |
956 | */ | |
957 | if (err == -ENOIOCTLCMD) | |
958 | err = dev_ioctl(net, cmd, argp); | |
959 | ||
960 | return err; | |
961 | } | |
962 | ||
1da177e4 LT |
963 | /* |
964 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
965 | * what to do with it - that's up to the protocol still. | |
966 | */ | |
967 | ||
968 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
969 | { | |
970 | struct socket *sock; | |
881d966b | 971 | struct sock *sk; |
1da177e4 LT |
972 | void __user *argp = (void __user *)arg; |
973 | int pid, err; | |
881d966b | 974 | struct net *net; |
1da177e4 | 975 | |
b69aee04 | 976 | sock = file->private_data; |
881d966b | 977 | sk = sock->sk; |
3b1e0a65 | 978 | net = sock_net(sk); |
1da177e4 | 979 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 980 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 981 | } else |
3d23e349 | 982 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 983 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 984 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 985 | } else |
3d23e349 | 986 | #endif |
89bddce5 | 987 | switch (cmd) { |
1da177e4 LT |
988 | case FIOSETOWN: |
989 | case SIOCSPGRP: | |
990 | err = -EFAULT; | |
991 | if (get_user(pid, (int __user *)argp)) | |
992 | break; | |
e0b93edd JL |
993 | f_setown(sock->file, pid, 1); |
994 | err = 0; | |
1da177e4 LT |
995 | break; |
996 | case FIOGETOWN: | |
997 | case SIOCGPGRP: | |
609d7fa9 | 998 | err = put_user(f_getown(sock->file), |
89bddce5 | 999 | (int __user *)argp); |
1da177e4 LT |
1000 | break; |
1001 | case SIOCGIFBR: | |
1002 | case SIOCSIFBR: | |
1003 | case SIOCBRADDBR: | |
1004 | case SIOCBRDELBR: | |
1005 | err = -ENOPKG; | |
1006 | if (!br_ioctl_hook) | |
1007 | request_module("bridge"); | |
1008 | ||
4a3e2f71 | 1009 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1010 | if (br_ioctl_hook) |
881d966b | 1011 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1012 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1013 | break; |
1014 | case SIOCGIFVLAN: | |
1015 | case SIOCSIFVLAN: | |
1016 | err = -ENOPKG; | |
1017 | if (!vlan_ioctl_hook) | |
1018 | request_module("8021q"); | |
1019 | ||
4a3e2f71 | 1020 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1021 | if (vlan_ioctl_hook) |
881d966b | 1022 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1023 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1024 | break; |
1da177e4 LT |
1025 | case SIOCADDDLCI: |
1026 | case SIOCDELDLCI: | |
1027 | err = -ENOPKG; | |
1028 | if (!dlci_ioctl_hook) | |
1029 | request_module("dlci"); | |
1030 | ||
7512cbf6 PE |
1031 | mutex_lock(&dlci_ioctl_mutex); |
1032 | if (dlci_ioctl_hook) | |
1da177e4 | 1033 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1034 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1035 | break; |
1036 | default: | |
6b96018b | 1037 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1038 | break; |
89bddce5 | 1039 | } |
1da177e4 LT |
1040 | return err; |
1041 | } | |
1042 | ||
1043 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1044 | { | |
1045 | int err; | |
1046 | struct socket *sock = NULL; | |
89bddce5 | 1047 | |
1da177e4 LT |
1048 | err = security_socket_create(family, type, protocol, 1); |
1049 | if (err) | |
1050 | goto out; | |
1051 | ||
1052 | sock = sock_alloc(); | |
1053 | if (!sock) { | |
1054 | err = -ENOMEM; | |
1055 | goto out; | |
1056 | } | |
1057 | ||
1da177e4 | 1058 | sock->type = type; |
7420ed23 VY |
1059 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1060 | if (err) | |
1061 | goto out_release; | |
1062 | ||
1da177e4 LT |
1063 | out: |
1064 | *res = sock; | |
1065 | return err; | |
7420ed23 VY |
1066 | out_release: |
1067 | sock_release(sock); | |
1068 | sock = NULL; | |
1069 | goto out; | |
1da177e4 | 1070 | } |
c6d409cf | 1071 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1072 | |
1073 | /* No kernel lock held - perfect */ | |
89bddce5 | 1074 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 | 1075 | { |
cbf55001 | 1076 | unsigned int busy_flag = 0; |
1da177e4 LT |
1077 | struct socket *sock; |
1078 | ||
1079 | /* | |
89bddce5 | 1080 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1081 | */ |
b69aee04 | 1082 | sock = file->private_data; |
2d48d67f | 1083 | |
cbf55001 | 1084 | if (sk_can_busy_loop(sock->sk)) { |
2d48d67f | 1085 | /* this socket can poll_ll so tell the system call */ |
cbf55001 | 1086 | busy_flag = POLL_BUSY_LOOP; |
2d48d67f ET |
1087 | |
1088 | /* once, only if requested by syscall */ | |
cbf55001 ET |
1089 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
1090 | sk_busy_loop(sock->sk, 1); | |
2d48d67f ET |
1091 | } |
1092 | ||
cbf55001 | 1093 | return busy_flag | sock->ops->poll(file, sock, wait); |
1da177e4 LT |
1094 | } |
1095 | ||
89bddce5 | 1096 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1097 | { |
b69aee04 | 1098 | struct socket *sock = file->private_data; |
1da177e4 LT |
1099 | |
1100 | return sock->ops->mmap(file, sock, vma); | |
1101 | } | |
1102 | ||
20380731 | 1103 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1104 | { |
1da177e4 LT |
1105 | sock_release(SOCKET_I(inode)); |
1106 | return 0; | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | * Update the socket async list | |
1111 | * | |
1112 | * Fasync_list locking strategy. | |
1113 | * | |
1114 | * 1. fasync_list is modified only under process context socket lock | |
1115 | * i.e. under semaphore. | |
1116 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1117 | * or under socket lock |
1da177e4 LT |
1118 | */ |
1119 | ||
1120 | static int sock_fasync(int fd, struct file *filp, int on) | |
1121 | { | |
989a2979 ED |
1122 | struct socket *sock = filp->private_data; |
1123 | struct sock *sk = sock->sk; | |
eaefd110 | 1124 | struct socket_wq *wq; |
1da177e4 | 1125 | |
989a2979 | 1126 | if (sk == NULL) |
1da177e4 | 1127 | return -EINVAL; |
1da177e4 LT |
1128 | |
1129 | lock_sock(sk); | |
eaefd110 ED |
1130 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1131 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1132 | |
eaefd110 | 1133 | if (!wq->fasync_list) |
989a2979 ED |
1134 | sock_reset_flag(sk, SOCK_FASYNC); |
1135 | else | |
bcdce719 | 1136 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1137 | |
989a2979 | 1138 | release_sock(sk); |
1da177e4 LT |
1139 | return 0; |
1140 | } | |
1141 | ||
43815482 | 1142 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1143 | |
1144 | int sock_wake_async(struct socket *sock, int how, int band) | |
1145 | { | |
43815482 ED |
1146 | struct socket_wq *wq; |
1147 | ||
1148 | if (!sock) | |
1149 | return -1; | |
1150 | rcu_read_lock(); | |
1151 | wq = rcu_dereference(sock->wq); | |
1152 | if (!wq || !wq->fasync_list) { | |
1153 | rcu_read_unlock(); | |
1da177e4 | 1154 | return -1; |
43815482 | 1155 | } |
89bddce5 | 1156 | switch (how) { |
8d8ad9d7 | 1157 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1158 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1159 | break; | |
1160 | goto call_kill; | |
8d8ad9d7 | 1161 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1162 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1163 | break; | |
1164 | /* fall through */ | |
8d8ad9d7 | 1165 | case SOCK_WAKE_IO: |
89bddce5 | 1166 | call_kill: |
43815482 | 1167 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1168 | break; |
8d8ad9d7 | 1169 | case SOCK_WAKE_URG: |
43815482 | 1170 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1171 | } |
43815482 | 1172 | rcu_read_unlock(); |
1da177e4 LT |
1173 | return 0; |
1174 | } | |
c6d409cf | 1175 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1176 | |
721db93a | 1177 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1178 | struct socket **res, int kern) |
1da177e4 LT |
1179 | { |
1180 | int err; | |
1181 | struct socket *sock; | |
55737fda | 1182 | const struct net_proto_family *pf; |
1da177e4 LT |
1183 | |
1184 | /* | |
89bddce5 | 1185 | * Check protocol is in range |
1da177e4 LT |
1186 | */ |
1187 | if (family < 0 || family >= NPROTO) | |
1188 | return -EAFNOSUPPORT; | |
1189 | if (type < 0 || type >= SOCK_MAX) | |
1190 | return -EINVAL; | |
1191 | ||
1192 | /* Compatibility. | |
1193 | ||
1194 | This uglymoron is moved from INET layer to here to avoid | |
1195 | deadlock in module load. | |
1196 | */ | |
1197 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1198 | static int warned; |
1da177e4 LT |
1199 | if (!warned) { |
1200 | warned = 1; | |
3410f22e YY |
1201 | pr_info("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1202 | current->comm); | |
1da177e4 LT |
1203 | } |
1204 | family = PF_PACKET; | |
1205 | } | |
1206 | ||
1207 | err = security_socket_create(family, type, protocol, kern); | |
1208 | if (err) | |
1209 | return err; | |
89bddce5 | 1210 | |
55737fda SH |
1211 | /* |
1212 | * Allocate the socket and allow the family to set things up. if | |
1213 | * the protocol is 0, the family is instructed to select an appropriate | |
1214 | * default. | |
1215 | */ | |
1216 | sock = sock_alloc(); | |
1217 | if (!sock) { | |
e87cc472 | 1218 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1219 | return -ENFILE; /* Not exactly a match, but its the |
1220 | closest posix thing */ | |
1221 | } | |
1222 | ||
1223 | sock->type = type; | |
1224 | ||
95a5afca | 1225 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1226 | /* Attempt to load a protocol module if the find failed. |
1227 | * | |
1228 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1229 | * requested real, full-featured networking support upon configuration. |
1230 | * Otherwise module support will break! | |
1231 | */ | |
190683a9 | 1232 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1233 | request_module("net-pf-%d", family); |
1da177e4 LT |
1234 | #endif |
1235 | ||
55737fda SH |
1236 | rcu_read_lock(); |
1237 | pf = rcu_dereference(net_families[family]); | |
1238 | err = -EAFNOSUPPORT; | |
1239 | if (!pf) | |
1240 | goto out_release; | |
1da177e4 LT |
1241 | |
1242 | /* | |
1243 | * We will call the ->create function, that possibly is in a loadable | |
1244 | * module, so we have to bump that loadable module refcnt first. | |
1245 | */ | |
55737fda | 1246 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1247 | goto out_release; |
1248 | ||
55737fda SH |
1249 | /* Now protected by module ref count */ |
1250 | rcu_read_unlock(); | |
1251 | ||
3f378b68 | 1252 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1253 | if (err < 0) |
1da177e4 | 1254 | goto out_module_put; |
a79af59e | 1255 | |
1da177e4 LT |
1256 | /* |
1257 | * Now to bump the refcnt of the [loadable] module that owns this | |
1258 | * socket at sock_release time we decrement its refcnt. | |
1259 | */ | |
55737fda SH |
1260 | if (!try_module_get(sock->ops->owner)) |
1261 | goto out_module_busy; | |
1262 | ||
1da177e4 LT |
1263 | /* |
1264 | * Now that we're done with the ->create function, the [loadable] | |
1265 | * module can have its refcnt decremented | |
1266 | */ | |
55737fda | 1267 | module_put(pf->owner); |
7420ed23 VY |
1268 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1269 | if (err) | |
3b185525 | 1270 | goto out_sock_release; |
55737fda | 1271 | *res = sock; |
1da177e4 | 1272 | |
55737fda SH |
1273 | return 0; |
1274 | ||
1275 | out_module_busy: | |
1276 | err = -EAFNOSUPPORT; | |
1da177e4 | 1277 | out_module_put: |
55737fda SH |
1278 | sock->ops = NULL; |
1279 | module_put(pf->owner); | |
1280 | out_sock_release: | |
1da177e4 | 1281 | sock_release(sock); |
55737fda SH |
1282 | return err; |
1283 | ||
1284 | out_release: | |
1285 | rcu_read_unlock(); | |
1286 | goto out_sock_release; | |
1da177e4 | 1287 | } |
721db93a | 1288 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1289 | |
1290 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1291 | { | |
1b8d7ae4 | 1292 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1293 | } |
c6d409cf | 1294 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1295 | |
1296 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1297 | { | |
1b8d7ae4 | 1298 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1299 | } |
c6d409cf | 1300 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1301 | |
3e0fa65f | 1302 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1303 | { |
1304 | int retval; | |
1305 | struct socket *sock; | |
a677a039 UD |
1306 | int flags; |
1307 | ||
e38b36f3 UD |
1308 | /* Check the SOCK_* constants for consistency. */ |
1309 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1310 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1311 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1312 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1313 | ||
a677a039 | 1314 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1315 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1316 | return -EINVAL; |
1317 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1318 | |
aaca0bdc UD |
1319 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1320 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1321 | ||
1da177e4 LT |
1322 | retval = sock_create(family, type, protocol, &sock); |
1323 | if (retval < 0) | |
1324 | goto out; | |
1325 | ||
77d27200 | 1326 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1327 | if (retval < 0) |
1328 | goto out_release; | |
1329 | ||
1330 | out: | |
1331 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1332 | return retval; | |
1333 | ||
1334 | out_release: | |
1335 | sock_release(sock); | |
1336 | return retval; | |
1337 | } | |
1338 | ||
1339 | /* | |
1340 | * Create a pair of connected sockets. | |
1341 | */ | |
1342 | ||
3e0fa65f HC |
1343 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1344 | int __user *, usockvec) | |
1da177e4 LT |
1345 | { |
1346 | struct socket *sock1, *sock2; | |
1347 | int fd1, fd2, err; | |
db349509 | 1348 | struct file *newfile1, *newfile2; |
a677a039 UD |
1349 | int flags; |
1350 | ||
1351 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1352 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1353 | return -EINVAL; |
1354 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1355 | |
aaca0bdc UD |
1356 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1357 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1358 | ||
1da177e4 LT |
1359 | /* |
1360 | * Obtain the first socket and check if the underlying protocol | |
1361 | * supports the socketpair call. | |
1362 | */ | |
1363 | ||
1364 | err = sock_create(family, type, protocol, &sock1); | |
1365 | if (err < 0) | |
1366 | goto out; | |
1367 | ||
1368 | err = sock_create(family, type, protocol, &sock2); | |
1369 | if (err < 0) | |
1370 | goto out_release_1; | |
1371 | ||
1372 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1373 | if (err < 0) |
1da177e4 LT |
1374 | goto out_release_both; |
1375 | ||
28407630 | 1376 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1377 | if (unlikely(fd1 < 0)) { |
1378 | err = fd1; | |
db349509 | 1379 | goto out_release_both; |
bf3c23d1 | 1380 | } |
d73aa286 | 1381 | |
28407630 | 1382 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1383 | if (unlikely(fd2 < 0)) { |
1384 | err = fd2; | |
d73aa286 | 1385 | goto out_put_unused_1; |
28407630 AV |
1386 | } |
1387 | ||
aab174f0 | 1388 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
28407630 AV |
1389 | if (unlikely(IS_ERR(newfile1))) { |
1390 | err = PTR_ERR(newfile1); | |
d73aa286 | 1391 | goto out_put_unused_both; |
28407630 AV |
1392 | } |
1393 | ||
aab174f0 | 1394 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1395 | if (IS_ERR(newfile2)) { |
1396 | err = PTR_ERR(newfile2); | |
d73aa286 | 1397 | goto out_fput_1; |
db349509 AV |
1398 | } |
1399 | ||
d73aa286 YD |
1400 | err = put_user(fd1, &usockvec[0]); |
1401 | if (err) | |
1402 | goto out_fput_both; | |
1403 | ||
1404 | err = put_user(fd2, &usockvec[1]); | |
1405 | if (err) | |
1406 | goto out_fput_both; | |
1407 | ||
157cf649 | 1408 | audit_fd_pair(fd1, fd2); |
d73aa286 | 1409 | |
db349509 AV |
1410 | fd_install(fd1, newfile1); |
1411 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1412 | /* fd1 and fd2 may be already another descriptors. |
1413 | * Not kernel problem. | |
1414 | */ | |
1415 | ||
d73aa286 | 1416 | return 0; |
1da177e4 | 1417 | |
d73aa286 YD |
1418 | out_fput_both: |
1419 | fput(newfile2); | |
1420 | fput(newfile1); | |
1421 | put_unused_fd(fd2); | |
1422 | put_unused_fd(fd1); | |
1423 | goto out; | |
1424 | ||
1425 | out_fput_1: | |
1426 | fput(newfile1); | |
1427 | put_unused_fd(fd2); | |
1428 | put_unused_fd(fd1); | |
1429 | sock_release(sock2); | |
1430 | goto out; | |
1da177e4 | 1431 | |
d73aa286 YD |
1432 | out_put_unused_both: |
1433 | put_unused_fd(fd2); | |
1434 | out_put_unused_1: | |
1435 | put_unused_fd(fd1); | |
1da177e4 | 1436 | out_release_both: |
89bddce5 | 1437 | sock_release(sock2); |
1da177e4 | 1438 | out_release_1: |
89bddce5 | 1439 | sock_release(sock1); |
1da177e4 LT |
1440 | out: |
1441 | return err; | |
1442 | } | |
1443 | ||
1da177e4 LT |
1444 | /* |
1445 | * Bind a name to a socket. Nothing much to do here since it's | |
1446 | * the protocol's responsibility to handle the local address. | |
1447 | * | |
1448 | * We move the socket address to kernel space before we call | |
1449 | * the protocol layer (having also checked the address is ok). | |
1450 | */ | |
1451 | ||
20f37034 | 1452 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1453 | { |
1454 | struct socket *sock; | |
230b1839 | 1455 | struct sockaddr_storage address; |
6cb153ca | 1456 | int err, fput_needed; |
1da177e4 | 1457 | |
89bddce5 | 1458 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1459 | if (sock) { |
43db362d | 1460 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1461 | if (err >= 0) { |
1462 | err = security_socket_bind(sock, | |
230b1839 | 1463 | (struct sockaddr *)&address, |
89bddce5 | 1464 | addrlen); |
6cb153ca BL |
1465 | if (!err) |
1466 | err = sock->ops->bind(sock, | |
89bddce5 | 1467 | (struct sockaddr *) |
230b1839 | 1468 | &address, addrlen); |
1da177e4 | 1469 | } |
6cb153ca | 1470 | fput_light(sock->file, fput_needed); |
89bddce5 | 1471 | } |
1da177e4 LT |
1472 | return err; |
1473 | } | |
1474 | ||
1da177e4 LT |
1475 | /* |
1476 | * Perform a listen. Basically, we allow the protocol to do anything | |
1477 | * necessary for a listen, and if that works, we mark the socket as | |
1478 | * ready for listening. | |
1479 | */ | |
1480 | ||
3e0fa65f | 1481 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1482 | { |
1483 | struct socket *sock; | |
6cb153ca | 1484 | int err, fput_needed; |
b8e1f9b5 | 1485 | int somaxconn; |
89bddce5 SH |
1486 | |
1487 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1488 | if (sock) { | |
8efa6e93 | 1489 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1490 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1491 | backlog = somaxconn; |
1da177e4 LT |
1492 | |
1493 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1494 | if (!err) |
1495 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1496 | |
6cb153ca | 1497 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1498 | } |
1499 | return err; | |
1500 | } | |
1501 | ||
1da177e4 LT |
1502 | /* |
1503 | * For accept, we attempt to create a new socket, set up the link | |
1504 | * with the client, wake up the client, then return the new | |
1505 | * connected fd. We collect the address of the connector in kernel | |
1506 | * space and move it to user at the very end. This is unclean because | |
1507 | * we open the socket then return an error. | |
1508 | * | |
1509 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1510 | * status to recvmsg. We need to add that support in a way thats | |
1511 | * clean when we restucture accept also. | |
1512 | */ | |
1513 | ||
20f37034 HC |
1514 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1515 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1516 | { |
1517 | struct socket *sock, *newsock; | |
39d8c1b6 | 1518 | struct file *newfile; |
6cb153ca | 1519 | int err, len, newfd, fput_needed; |
230b1839 | 1520 | struct sockaddr_storage address; |
1da177e4 | 1521 | |
77d27200 | 1522 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1523 | return -EINVAL; |
1524 | ||
1525 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1526 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1527 | ||
6cb153ca | 1528 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1529 | if (!sock) |
1530 | goto out; | |
1531 | ||
1532 | err = -ENFILE; | |
c6d409cf ED |
1533 | newsock = sock_alloc(); |
1534 | if (!newsock) | |
1da177e4 LT |
1535 | goto out_put; |
1536 | ||
1537 | newsock->type = sock->type; | |
1538 | newsock->ops = sock->ops; | |
1539 | ||
1da177e4 LT |
1540 | /* |
1541 | * We don't need try_module_get here, as the listening socket (sock) | |
1542 | * has the protocol module (sock->ops->owner) held. | |
1543 | */ | |
1544 | __module_get(newsock->ops->owner); | |
1545 | ||
28407630 | 1546 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1547 | if (unlikely(newfd < 0)) { |
1548 | err = newfd; | |
9a1875e6 DM |
1549 | sock_release(newsock); |
1550 | goto out_put; | |
39d8c1b6 | 1551 | } |
aab174f0 | 1552 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
28407630 AV |
1553 | if (unlikely(IS_ERR(newfile))) { |
1554 | err = PTR_ERR(newfile); | |
1555 | put_unused_fd(newfd); | |
1556 | sock_release(newsock); | |
1557 | goto out_put; | |
1558 | } | |
39d8c1b6 | 1559 | |
a79af59e FF |
1560 | err = security_socket_accept(sock, newsock); |
1561 | if (err) | |
39d8c1b6 | 1562 | goto out_fd; |
a79af59e | 1563 | |
1da177e4 LT |
1564 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1565 | if (err < 0) | |
39d8c1b6 | 1566 | goto out_fd; |
1da177e4 LT |
1567 | |
1568 | if (upeer_sockaddr) { | |
230b1839 | 1569 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1570 | &len, 2) < 0) { |
1da177e4 | 1571 | err = -ECONNABORTED; |
39d8c1b6 | 1572 | goto out_fd; |
1da177e4 | 1573 | } |
43db362d | 1574 | err = move_addr_to_user(&address, |
230b1839 | 1575 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1576 | if (err < 0) |
39d8c1b6 | 1577 | goto out_fd; |
1da177e4 LT |
1578 | } |
1579 | ||
1580 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1581 | ||
39d8c1b6 DM |
1582 | fd_install(newfd, newfile); |
1583 | err = newfd; | |
1da177e4 | 1584 | |
1da177e4 | 1585 | out_put: |
6cb153ca | 1586 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1587 | out: |
1588 | return err; | |
39d8c1b6 | 1589 | out_fd: |
9606a216 | 1590 | fput(newfile); |
39d8c1b6 | 1591 | put_unused_fd(newfd); |
1da177e4 LT |
1592 | goto out_put; |
1593 | } | |
1594 | ||
20f37034 HC |
1595 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1596 | int __user *, upeer_addrlen) | |
aaca0bdc | 1597 | { |
de11defe | 1598 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1599 | } |
1600 | ||
1da177e4 LT |
1601 | /* |
1602 | * Attempt to connect to a socket with the server address. The address | |
1603 | * is in user space so we verify it is OK and move it to kernel space. | |
1604 | * | |
1605 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1606 | * break bindings | |
1607 | * | |
1608 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1609 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1610 | * include the -EINPROGRESS status for such sockets. | |
1611 | */ | |
1612 | ||
20f37034 HC |
1613 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1614 | int, addrlen) | |
1da177e4 LT |
1615 | { |
1616 | struct socket *sock; | |
230b1839 | 1617 | struct sockaddr_storage address; |
6cb153ca | 1618 | int err, fput_needed; |
1da177e4 | 1619 | |
6cb153ca | 1620 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1621 | if (!sock) |
1622 | goto out; | |
43db362d | 1623 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1624 | if (err < 0) |
1625 | goto out_put; | |
1626 | ||
89bddce5 | 1627 | err = |
230b1839 | 1628 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1629 | if (err) |
1630 | goto out_put; | |
1631 | ||
230b1839 | 1632 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1633 | sock->file->f_flags); |
1634 | out_put: | |
6cb153ca | 1635 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1636 | out: |
1637 | return err; | |
1638 | } | |
1639 | ||
1640 | /* | |
1641 | * Get the local address ('name') of a socket object. Move the obtained | |
1642 | * name to user space. | |
1643 | */ | |
1644 | ||
20f37034 HC |
1645 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1646 | int __user *, usockaddr_len) | |
1da177e4 LT |
1647 | { |
1648 | struct socket *sock; | |
230b1839 | 1649 | struct sockaddr_storage address; |
6cb153ca | 1650 | int len, err, fput_needed; |
89bddce5 | 1651 | |
6cb153ca | 1652 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1653 | if (!sock) |
1654 | goto out; | |
1655 | ||
1656 | err = security_socket_getsockname(sock); | |
1657 | if (err) | |
1658 | goto out_put; | |
1659 | ||
230b1839 | 1660 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1661 | if (err) |
1662 | goto out_put; | |
43db362d | 1663 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1664 | |
1665 | out_put: | |
6cb153ca | 1666 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1667 | out: |
1668 | return err; | |
1669 | } | |
1670 | ||
1671 | /* | |
1672 | * Get the remote address ('name') of a socket object. Move the obtained | |
1673 | * name to user space. | |
1674 | */ | |
1675 | ||
20f37034 HC |
1676 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1677 | int __user *, usockaddr_len) | |
1da177e4 LT |
1678 | { |
1679 | struct socket *sock; | |
230b1839 | 1680 | struct sockaddr_storage address; |
6cb153ca | 1681 | int len, err, fput_needed; |
1da177e4 | 1682 | |
89bddce5 SH |
1683 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1684 | if (sock != NULL) { | |
1da177e4 LT |
1685 | err = security_socket_getpeername(sock); |
1686 | if (err) { | |
6cb153ca | 1687 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1688 | return err; |
1689 | } | |
1690 | ||
89bddce5 | 1691 | err = |
230b1839 | 1692 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1693 | 1); |
1da177e4 | 1694 | if (!err) |
43db362d | 1695 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1696 | usockaddr_len); |
6cb153ca | 1697 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1698 | } |
1699 | return err; | |
1700 | } | |
1701 | ||
1702 | /* | |
1703 | * Send a datagram to a given address. We move the address into kernel | |
1704 | * space and check the user space data area is readable before invoking | |
1705 | * the protocol. | |
1706 | */ | |
1707 | ||
3e0fa65f | 1708 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1709 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1710 | int, addr_len) |
1da177e4 LT |
1711 | { |
1712 | struct socket *sock; | |
230b1839 | 1713 | struct sockaddr_storage address; |
1da177e4 LT |
1714 | int err; |
1715 | struct msghdr msg; | |
1716 | struct iovec iov; | |
6cb153ca | 1717 | int fput_needed; |
6cb153ca | 1718 | |
253eacc0 LT |
1719 | if (len > INT_MAX) |
1720 | len = INT_MAX; | |
de0fa95c PE |
1721 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1722 | if (!sock) | |
4387ff75 | 1723 | goto out; |
6cb153ca | 1724 | |
89bddce5 SH |
1725 | iov.iov_base = buff; |
1726 | iov.iov_len = len; | |
1727 | msg.msg_name = NULL; | |
c0371da6 | 1728 | iov_iter_init(&msg.msg_iter, WRITE, &iov, 1, len); |
89bddce5 SH |
1729 | msg.msg_control = NULL; |
1730 | msg.msg_controllen = 0; | |
1731 | msg.msg_namelen = 0; | |
6cb153ca | 1732 | if (addr) { |
43db362d | 1733 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1734 | if (err < 0) |
1735 | goto out_put; | |
230b1839 | 1736 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1737 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1738 | } |
1739 | if (sock->file->f_flags & O_NONBLOCK) | |
1740 | flags |= MSG_DONTWAIT; | |
1741 | msg.msg_flags = flags; | |
1742 | err = sock_sendmsg(sock, &msg, len); | |
1743 | ||
89bddce5 | 1744 | out_put: |
de0fa95c | 1745 | fput_light(sock->file, fput_needed); |
4387ff75 | 1746 | out: |
1da177e4 LT |
1747 | return err; |
1748 | } | |
1749 | ||
1750 | /* | |
89bddce5 | 1751 | * Send a datagram down a socket. |
1da177e4 LT |
1752 | */ |
1753 | ||
3e0fa65f | 1754 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1755 | unsigned int, flags) |
1da177e4 LT |
1756 | { |
1757 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1758 | } | |
1759 | ||
1760 | /* | |
89bddce5 | 1761 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1762 | * sender. We verify the buffers are writable and if needed move the |
1763 | * sender address from kernel to user space. | |
1764 | */ | |
1765 | ||
3e0fa65f | 1766 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1767 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1768 | int __user *, addr_len) |
1da177e4 LT |
1769 | { |
1770 | struct socket *sock; | |
1771 | struct iovec iov; | |
1772 | struct msghdr msg; | |
230b1839 | 1773 | struct sockaddr_storage address; |
89bddce5 | 1774 | int err, err2; |
6cb153ca BL |
1775 | int fput_needed; |
1776 | ||
253eacc0 LT |
1777 | if (size > INT_MAX) |
1778 | size = INT_MAX; | |
de0fa95c | 1779 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1780 | if (!sock) |
de0fa95c | 1781 | goto out; |
1da177e4 | 1782 | |
89bddce5 SH |
1783 | msg.msg_control = NULL; |
1784 | msg.msg_controllen = 0; | |
89bddce5 SH |
1785 | iov.iov_len = size; |
1786 | iov.iov_base = ubuf; | |
c0371da6 | 1787 | iov_iter_init(&msg.msg_iter, READ, &iov, 1, size); |
f3d33426 HFS |
1788 | /* Save some cycles and don't copy the address if not needed */ |
1789 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1790 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1791 | msg.msg_namelen = 0; | |
1da177e4 LT |
1792 | if (sock->file->f_flags & O_NONBLOCK) |
1793 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1794 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1795 | |
89bddce5 | 1796 | if (err >= 0 && addr != NULL) { |
43db362d | 1797 | err2 = move_addr_to_user(&address, |
230b1839 | 1798 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1799 | if (err2 < 0) |
1800 | err = err2; | |
1da177e4 | 1801 | } |
de0fa95c PE |
1802 | |
1803 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1804 | out: |
1da177e4 LT |
1805 | return err; |
1806 | } | |
1807 | ||
1808 | /* | |
89bddce5 | 1809 | * Receive a datagram from a socket. |
1da177e4 LT |
1810 | */ |
1811 | ||
b7c0ddf5 JG |
1812 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
1813 | unsigned int, flags) | |
1da177e4 LT |
1814 | { |
1815 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1816 | } | |
1817 | ||
1818 | /* | |
1819 | * Set a socket option. Because we don't know the option lengths we have | |
1820 | * to pass the user mode parameter for the protocols to sort out. | |
1821 | */ | |
1822 | ||
20f37034 HC |
1823 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1824 | char __user *, optval, int, optlen) | |
1da177e4 | 1825 | { |
6cb153ca | 1826 | int err, fput_needed; |
1da177e4 LT |
1827 | struct socket *sock; |
1828 | ||
1829 | if (optlen < 0) | |
1830 | return -EINVAL; | |
89bddce5 SH |
1831 | |
1832 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1833 | if (sock != NULL) { | |
1834 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1835 | if (err) |
1836 | goto out_put; | |
1da177e4 LT |
1837 | |
1838 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1839 | err = |
1840 | sock_setsockopt(sock, level, optname, optval, | |
1841 | optlen); | |
1da177e4 | 1842 | else |
89bddce5 SH |
1843 | err = |
1844 | sock->ops->setsockopt(sock, level, optname, optval, | |
1845 | optlen); | |
6cb153ca BL |
1846 | out_put: |
1847 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1848 | } |
1849 | return err; | |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | * Get a socket option. Because we don't know the option lengths we have | |
1854 | * to pass a user mode parameter for the protocols to sort out. | |
1855 | */ | |
1856 | ||
20f37034 HC |
1857 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1858 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1859 | { |
6cb153ca | 1860 | int err, fput_needed; |
1da177e4 LT |
1861 | struct socket *sock; |
1862 | ||
89bddce5 SH |
1863 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1864 | if (sock != NULL) { | |
6cb153ca BL |
1865 | err = security_socket_getsockopt(sock, level, optname); |
1866 | if (err) | |
1867 | goto out_put; | |
1da177e4 LT |
1868 | |
1869 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1870 | err = |
1871 | sock_getsockopt(sock, level, optname, optval, | |
1872 | optlen); | |
1da177e4 | 1873 | else |
89bddce5 SH |
1874 | err = |
1875 | sock->ops->getsockopt(sock, level, optname, optval, | |
1876 | optlen); | |
6cb153ca BL |
1877 | out_put: |
1878 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1879 | } |
1880 | return err; | |
1881 | } | |
1882 | ||
1da177e4 LT |
1883 | /* |
1884 | * Shutdown a socket. | |
1885 | */ | |
1886 | ||
754fe8d2 | 1887 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1888 | { |
6cb153ca | 1889 | int err, fput_needed; |
1da177e4 LT |
1890 | struct socket *sock; |
1891 | ||
89bddce5 SH |
1892 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1893 | if (sock != NULL) { | |
1da177e4 | 1894 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1895 | if (!err) |
1896 | err = sock->ops->shutdown(sock, how); | |
1897 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1898 | } |
1899 | return err; | |
1900 | } | |
1901 | ||
89bddce5 | 1902 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1903 | * fields which are the same type (int / unsigned) on our platforms. |
1904 | */ | |
1905 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1906 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1907 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1908 | ||
c71d8ebe TH |
1909 | struct used_address { |
1910 | struct sockaddr_storage name; | |
1911 | unsigned int name_len; | |
1912 | }; | |
1913 | ||
08adb7da AV |
1914 | static ssize_t copy_msghdr_from_user(struct msghdr *kmsg, |
1915 | struct user_msghdr __user *umsg, | |
1916 | struct sockaddr __user **save_addr, | |
1917 | struct iovec **iov) | |
1661bf36 | 1918 | { |
08adb7da AV |
1919 | struct sockaddr __user *uaddr; |
1920 | struct iovec __user *uiov; | |
c0371da6 | 1921 | size_t nr_segs; |
08adb7da AV |
1922 | ssize_t err; |
1923 | ||
1924 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || | |
1925 | __get_user(uaddr, &umsg->msg_name) || | |
1926 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || | |
1927 | __get_user(uiov, &umsg->msg_iov) || | |
c0371da6 | 1928 | __get_user(nr_segs, &umsg->msg_iovlen) || |
08adb7da AV |
1929 | __get_user(kmsg->msg_control, &umsg->msg_control) || |
1930 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || | |
1931 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) | |
1661bf36 | 1932 | return -EFAULT; |
dbb490b9 | 1933 | |
08adb7da | 1934 | if (!uaddr) |
6a2a2b3a AS |
1935 | kmsg->msg_namelen = 0; |
1936 | ||
dbb490b9 ML |
1937 | if (kmsg->msg_namelen < 0) |
1938 | return -EINVAL; | |
1939 | ||
1661bf36 | 1940 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 1941 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
08adb7da AV |
1942 | |
1943 | if (save_addr) | |
1944 | *save_addr = uaddr; | |
1945 | ||
1946 | if (uaddr && kmsg->msg_namelen) { | |
1947 | if (!save_addr) { | |
1948 | err = move_addr_to_kernel(uaddr, kmsg->msg_namelen, | |
1949 | kmsg->msg_name); | |
1950 | if (err < 0) | |
1951 | return err; | |
1952 | } | |
1953 | } else { | |
1954 | kmsg->msg_name = NULL; | |
1955 | kmsg->msg_namelen = 0; | |
1956 | } | |
1957 | ||
c0371da6 | 1958 | if (nr_segs > UIO_MAXIOV) |
08adb7da AV |
1959 | return -EMSGSIZE; |
1960 | ||
1961 | err = rw_copy_check_uvector(save_addr ? READ : WRITE, | |
c0371da6 | 1962 | uiov, nr_segs, |
08adb7da AV |
1963 | UIO_FASTIOV, *iov, iov); |
1964 | if (err >= 0) | |
c0371da6 AV |
1965 | iov_iter_init(&kmsg->msg_iter, save_addr ? READ : WRITE, |
1966 | *iov, nr_segs, err); | |
08adb7da | 1967 | return err; |
1661bf36 DC |
1968 | } |
1969 | ||
666547ff | 1970 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 1971 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1972 | struct used_address *used_address) |
1da177e4 | 1973 | { |
89bddce5 SH |
1974 | struct compat_msghdr __user *msg_compat = |
1975 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1976 | struct sockaddr_storage address; |
1da177e4 | 1977 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1978 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1979 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1980 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 1981 | unsigned char *ctl_buf = ctl; |
08adb7da AV |
1982 | int ctl_len, total_len; |
1983 | ssize_t err; | |
89bddce5 | 1984 | |
08adb7da | 1985 | msg_sys->msg_name = &address; |
1da177e4 | 1986 | |
08449320 | 1987 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 1988 | err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov); |
08449320 | 1989 | else |
08adb7da | 1990 | err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov); |
89bddce5 | 1991 | if (err < 0) |
1da177e4 LT |
1992 | goto out_freeiov; |
1993 | total_len = err; | |
1994 | ||
1995 | err = -ENOBUFS; | |
1996 | ||
228e548e | 1997 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 1998 | goto out_freeiov; |
228e548e | 1999 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2000 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2001 | err = |
228e548e | 2002 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2003 | sizeof(ctl)); |
1da177e4 LT |
2004 | if (err) |
2005 | goto out_freeiov; | |
228e548e AB |
2006 | ctl_buf = msg_sys->msg_control; |
2007 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2008 | } else if (ctl_len) { |
89bddce5 | 2009 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2010 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2011 | if (ctl_buf == NULL) |
1da177e4 LT |
2012 | goto out_freeiov; |
2013 | } | |
2014 | err = -EFAULT; | |
2015 | /* | |
228e548e | 2016 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2017 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2018 | * checking falls down on this. | |
2019 | */ | |
fb8621bb | 2020 | if (copy_from_user(ctl_buf, |
228e548e | 2021 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2022 | ctl_len)) |
1da177e4 | 2023 | goto out_freectl; |
228e548e | 2024 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2025 | } |
228e548e | 2026 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2027 | |
2028 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2029 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2030 | /* |
2031 | * If this is sendmmsg() and current destination address is same as | |
2032 | * previously succeeded address, omit asking LSM's decision. | |
2033 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2034 | * destination address never matches. | |
2035 | */ | |
bc909d9d MD |
2036 | if (used_address && msg_sys->msg_name && |
2037 | used_address->name_len == msg_sys->msg_namelen && | |
2038 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2039 | used_address->name_len)) { |
2040 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2041 | goto out_freectl; | |
2042 | } | |
2043 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2044 | /* | |
2045 | * If this is sendmmsg() and sending to current destination address was | |
2046 | * successful, remember it. | |
2047 | */ | |
2048 | if (used_address && err >= 0) { | |
2049 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2050 | if (msg_sys->msg_name) |
2051 | memcpy(&used_address->name, msg_sys->msg_name, | |
2052 | used_address->name_len); | |
c71d8ebe | 2053 | } |
1da177e4 LT |
2054 | |
2055 | out_freectl: | |
89bddce5 | 2056 | if (ctl_buf != ctl) |
1da177e4 LT |
2057 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2058 | out_freeiov: | |
2059 | if (iov != iovstack) | |
a74e9106 | 2060 | kfree(iov); |
228e548e AB |
2061 | return err; |
2062 | } | |
2063 | ||
2064 | /* | |
2065 | * BSD sendmsg interface | |
2066 | */ | |
2067 | ||
666547ff | 2068 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
228e548e AB |
2069 | { |
2070 | int fput_needed, err; | |
2071 | struct msghdr msg_sys; | |
1be374a0 AL |
2072 | struct socket *sock; |
2073 | ||
1be374a0 | 2074 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2075 | if (!sock) |
2076 | goto out; | |
2077 | ||
a7526eb5 | 2078 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2079 | |
6cb153ca | 2080 | fput_light(sock->file, fput_needed); |
89bddce5 | 2081 | out: |
1da177e4 LT |
2082 | return err; |
2083 | } | |
2084 | ||
666547ff | 2085 | SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
a7526eb5 AL |
2086 | { |
2087 | if (flags & MSG_CMSG_COMPAT) | |
2088 | return -EINVAL; | |
2089 | return __sys_sendmsg(fd, msg, flags); | |
2090 | } | |
2091 | ||
228e548e AB |
2092 | /* |
2093 | * Linux sendmmsg interface | |
2094 | */ | |
2095 | ||
2096 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2097 | unsigned int flags) | |
2098 | { | |
2099 | int fput_needed, err, datagrams; | |
2100 | struct socket *sock; | |
2101 | struct mmsghdr __user *entry; | |
2102 | struct compat_mmsghdr __user *compat_entry; | |
2103 | struct msghdr msg_sys; | |
c71d8ebe | 2104 | struct used_address used_address; |
228e548e | 2105 | |
98382f41 AB |
2106 | if (vlen > UIO_MAXIOV) |
2107 | vlen = UIO_MAXIOV; | |
228e548e AB |
2108 | |
2109 | datagrams = 0; | |
2110 | ||
2111 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2112 | if (!sock) | |
2113 | return err; | |
2114 | ||
c71d8ebe | 2115 | used_address.name_len = UINT_MAX; |
228e548e AB |
2116 | entry = mmsg; |
2117 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2118 | err = 0; |
228e548e AB |
2119 | |
2120 | while (datagrams < vlen) { | |
228e548e | 2121 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2122 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5 | 2123 | &msg_sys, flags, &used_address); |
228e548e AB |
2124 | if (err < 0) |
2125 | break; | |
2126 | err = __put_user(err, &compat_entry->msg_len); | |
2127 | ++compat_entry; | |
2128 | } else { | |
a7526eb5 | 2129 | err = ___sys_sendmsg(sock, |
666547ff | 2130 | (struct user_msghdr __user *)entry, |
a7526eb5 | 2131 | &msg_sys, flags, &used_address); |
228e548e AB |
2132 | if (err < 0) |
2133 | break; | |
2134 | err = put_user(err, &entry->msg_len); | |
2135 | ++entry; | |
2136 | } | |
2137 | ||
2138 | if (err) | |
2139 | break; | |
2140 | ++datagrams; | |
2141 | } | |
2142 | ||
228e548e AB |
2143 | fput_light(sock->file, fput_needed); |
2144 | ||
728ffb86 AB |
2145 | /* We only return an error if no datagrams were able to be sent */ |
2146 | if (datagrams != 0) | |
228e548e AB |
2147 | return datagrams; |
2148 | ||
228e548e AB |
2149 | return err; |
2150 | } | |
2151 | ||
2152 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2153 | unsigned int, vlen, unsigned int, flags) | |
2154 | { | |
1be374a0 AL |
2155 | if (flags & MSG_CMSG_COMPAT) |
2156 | return -EINVAL; | |
228e548e AB |
2157 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2158 | } | |
2159 | ||
666547ff | 2160 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 2161 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2162 | { |
89bddce5 SH |
2163 | struct compat_msghdr __user *msg_compat = |
2164 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2165 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2166 | struct iovec *iov = iovstack; |
1da177e4 | 2167 | unsigned long cmsg_ptr; |
08adb7da AV |
2168 | int total_len, len; |
2169 | ssize_t err; | |
1da177e4 LT |
2170 | |
2171 | /* kernel mode address */ | |
230b1839 | 2172 | struct sockaddr_storage addr; |
1da177e4 LT |
2173 | |
2174 | /* user mode address pointers */ | |
2175 | struct sockaddr __user *uaddr; | |
08adb7da | 2176 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
89bddce5 | 2177 | |
08adb7da | 2178 | msg_sys->msg_name = &addr; |
1da177e4 | 2179 | |
f3d33426 | 2180 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 2181 | err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov); |
f3d33426 | 2182 | else |
08adb7da | 2183 | err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov); |
1da177e4 LT |
2184 | if (err < 0) |
2185 | goto out_freeiov; | |
89bddce5 | 2186 | total_len = err; |
1da177e4 | 2187 | |
a2e27255 ACM |
2188 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2189 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2190 | |
f3d33426 HFS |
2191 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2192 | msg_sys->msg_namelen = 0; | |
2193 | ||
1da177e4 LT |
2194 | if (sock->file->f_flags & O_NONBLOCK) |
2195 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2196 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2197 | total_len, flags); | |
1da177e4 LT |
2198 | if (err < 0) |
2199 | goto out_freeiov; | |
2200 | len = err; | |
2201 | ||
2202 | if (uaddr != NULL) { | |
43db362d | 2203 | err = move_addr_to_user(&addr, |
a2e27255 | 2204 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2205 | uaddr_len); |
1da177e4 LT |
2206 | if (err < 0) |
2207 | goto out_freeiov; | |
2208 | } | |
a2e27255 | 2209 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2210 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2211 | if (err) |
2212 | goto out_freeiov; | |
2213 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2214 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2215 | &msg_compat->msg_controllen); |
2216 | else | |
a2e27255 | 2217 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2218 | &msg->msg_controllen); |
2219 | if (err) | |
2220 | goto out_freeiov; | |
2221 | err = len; | |
2222 | ||
2223 | out_freeiov: | |
2224 | if (iov != iovstack) | |
a74e9106 | 2225 | kfree(iov); |
a2e27255 ACM |
2226 | return err; |
2227 | } | |
2228 | ||
2229 | /* | |
2230 | * BSD recvmsg interface | |
2231 | */ | |
2232 | ||
666547ff | 2233 | long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2234 | { |
2235 | int fput_needed, err; | |
2236 | struct msghdr msg_sys; | |
1be374a0 AL |
2237 | struct socket *sock; |
2238 | ||
1be374a0 | 2239 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2240 | if (!sock) |
2241 | goto out; | |
2242 | ||
a7526eb5 | 2243 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2244 | |
6cb153ca | 2245 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2246 | out: |
2247 | return err; | |
2248 | } | |
2249 | ||
666547ff | 2250 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
a7526eb5 AL |
2251 | unsigned int, flags) |
2252 | { | |
2253 | if (flags & MSG_CMSG_COMPAT) | |
2254 | return -EINVAL; | |
2255 | return __sys_recvmsg(fd, msg, flags); | |
2256 | } | |
2257 | ||
a2e27255 ACM |
2258 | /* |
2259 | * Linux recvmmsg interface | |
2260 | */ | |
2261 | ||
2262 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2263 | unsigned int flags, struct timespec *timeout) | |
2264 | { | |
2265 | int fput_needed, err, datagrams; | |
2266 | struct socket *sock; | |
2267 | struct mmsghdr __user *entry; | |
d7256d0e | 2268 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2269 | struct msghdr msg_sys; |
2270 | struct timespec end_time; | |
2271 | ||
2272 | if (timeout && | |
2273 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2274 | timeout->tv_nsec)) | |
2275 | return -EINVAL; | |
2276 | ||
2277 | datagrams = 0; | |
2278 | ||
2279 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2280 | if (!sock) | |
2281 | return err; | |
2282 | ||
2283 | err = sock_error(sock->sk); | |
2284 | if (err) | |
2285 | goto out_put; | |
2286 | ||
2287 | entry = mmsg; | |
d7256d0e | 2288 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2289 | |
2290 | while (datagrams < vlen) { | |
2291 | /* | |
2292 | * No need to ask LSM for more than the first datagram. | |
2293 | */ | |
d7256d0e | 2294 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2295 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5 AL |
2296 | &msg_sys, flags & ~MSG_WAITFORONE, |
2297 | datagrams); | |
d7256d0e JMG |
2298 | if (err < 0) |
2299 | break; | |
2300 | err = __put_user(err, &compat_entry->msg_len); | |
2301 | ++compat_entry; | |
2302 | } else { | |
a7526eb5 | 2303 | err = ___sys_recvmsg(sock, |
666547ff | 2304 | (struct user_msghdr __user *)entry, |
a7526eb5 AL |
2305 | &msg_sys, flags & ~MSG_WAITFORONE, |
2306 | datagrams); | |
d7256d0e JMG |
2307 | if (err < 0) |
2308 | break; | |
2309 | err = put_user(err, &entry->msg_len); | |
2310 | ++entry; | |
2311 | } | |
2312 | ||
a2e27255 ACM |
2313 | if (err) |
2314 | break; | |
a2e27255 ACM |
2315 | ++datagrams; |
2316 | ||
71c5c159 BB |
2317 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2318 | if (flags & MSG_WAITFORONE) | |
2319 | flags |= MSG_DONTWAIT; | |
2320 | ||
a2e27255 ACM |
2321 | if (timeout) { |
2322 | ktime_get_ts(timeout); | |
2323 | *timeout = timespec_sub(end_time, *timeout); | |
2324 | if (timeout->tv_sec < 0) { | |
2325 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2326 | break; | |
2327 | } | |
2328 | ||
2329 | /* Timeout, return less than vlen datagrams */ | |
2330 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2331 | break; | |
2332 | } | |
2333 | ||
2334 | /* Out of band data, return right away */ | |
2335 | if (msg_sys.msg_flags & MSG_OOB) | |
2336 | break; | |
2337 | } | |
2338 | ||
2339 | out_put: | |
2340 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2341 | |
a2e27255 ACM |
2342 | if (err == 0) |
2343 | return datagrams; | |
2344 | ||
2345 | if (datagrams != 0) { | |
2346 | /* | |
2347 | * We may return less entries than requested (vlen) if the | |
2348 | * sock is non block and there aren't enough datagrams... | |
2349 | */ | |
2350 | if (err != -EAGAIN) { | |
2351 | /* | |
2352 | * ... or if recvmsg returns an error after we | |
2353 | * received some datagrams, where we record the | |
2354 | * error to return on the next call or if the | |
2355 | * app asks about it using getsockopt(SO_ERROR). | |
2356 | */ | |
2357 | sock->sk->sk_err = -err; | |
2358 | } | |
2359 | ||
2360 | return datagrams; | |
2361 | } | |
2362 | ||
2363 | return err; | |
2364 | } | |
2365 | ||
2366 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2367 | unsigned int, vlen, unsigned int, flags, | |
2368 | struct timespec __user *, timeout) | |
2369 | { | |
2370 | int datagrams; | |
2371 | struct timespec timeout_sys; | |
2372 | ||
1be374a0 AL |
2373 | if (flags & MSG_CMSG_COMPAT) |
2374 | return -EINVAL; | |
2375 | ||
a2e27255 ACM |
2376 | if (!timeout) |
2377 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2378 | ||
2379 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2380 | return -EFAULT; | |
2381 | ||
2382 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2383 | ||
2384 | if (datagrams > 0 && | |
2385 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2386 | datagrams = -EFAULT; | |
2387 | ||
2388 | return datagrams; | |
2389 | } | |
2390 | ||
2391 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2392 | /* Argument list sizes for sys_socketcall */ |
2393 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2394 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2395 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2396 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2397 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2398 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2399 | }; |
2400 | ||
1da177e4 LT |
2401 | #undef AL |
2402 | ||
2403 | /* | |
89bddce5 | 2404 | * System call vectors. |
1da177e4 LT |
2405 | * |
2406 | * Argument checking cleaned up. Saved 20% in size. | |
2407 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2408 | * it is set by the callees. |
1da177e4 LT |
2409 | */ |
2410 | ||
3e0fa65f | 2411 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2412 | { |
2950fa9d | 2413 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2414 | unsigned long a0, a1; |
1da177e4 | 2415 | int err; |
47379052 | 2416 | unsigned int len; |
1da177e4 | 2417 | |
228e548e | 2418 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2419 | return -EINVAL; |
2420 | ||
47379052 AV |
2421 | len = nargs[call]; |
2422 | if (len > sizeof(a)) | |
2423 | return -EINVAL; | |
2424 | ||
1da177e4 | 2425 | /* copy_from_user should be SMP safe. */ |
47379052 | 2426 | if (copy_from_user(a, args, len)) |
1da177e4 | 2427 | return -EFAULT; |
3ec3b2fb | 2428 | |
2950fa9d CG |
2429 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2430 | if (err) | |
2431 | return err; | |
3ec3b2fb | 2432 | |
89bddce5 SH |
2433 | a0 = a[0]; |
2434 | a1 = a[1]; | |
2435 | ||
2436 | switch (call) { | |
2437 | case SYS_SOCKET: | |
2438 | err = sys_socket(a0, a1, a[2]); | |
2439 | break; | |
2440 | case SYS_BIND: | |
2441 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2442 | break; | |
2443 | case SYS_CONNECT: | |
2444 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2445 | break; | |
2446 | case SYS_LISTEN: | |
2447 | err = sys_listen(a0, a1); | |
2448 | break; | |
2449 | case SYS_ACCEPT: | |
de11defe UD |
2450 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2451 | (int __user *)a[2], 0); | |
89bddce5 SH |
2452 | break; |
2453 | case SYS_GETSOCKNAME: | |
2454 | err = | |
2455 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2456 | (int __user *)a[2]); | |
2457 | break; | |
2458 | case SYS_GETPEERNAME: | |
2459 | err = | |
2460 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2461 | (int __user *)a[2]); | |
2462 | break; | |
2463 | case SYS_SOCKETPAIR: | |
2464 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2465 | break; | |
2466 | case SYS_SEND: | |
2467 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2468 | break; | |
2469 | case SYS_SENDTO: | |
2470 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2471 | (struct sockaddr __user *)a[4], a[5]); | |
2472 | break; | |
2473 | case SYS_RECV: | |
2474 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2475 | break; | |
2476 | case SYS_RECVFROM: | |
2477 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2478 | (struct sockaddr __user *)a[4], | |
2479 | (int __user *)a[5]); | |
2480 | break; | |
2481 | case SYS_SHUTDOWN: | |
2482 | err = sys_shutdown(a0, a1); | |
2483 | break; | |
2484 | case SYS_SETSOCKOPT: | |
2485 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2486 | break; | |
2487 | case SYS_GETSOCKOPT: | |
2488 | err = | |
2489 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2490 | (int __user *)a[4]); | |
2491 | break; | |
2492 | case SYS_SENDMSG: | |
666547ff | 2493 | err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce5 | 2494 | break; |
228e548e AB |
2495 | case SYS_SENDMMSG: |
2496 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2497 | break; | |
89bddce5 | 2498 | case SYS_RECVMSG: |
666547ff | 2499 | err = sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce5 | 2500 | break; |
a2e27255 ACM |
2501 | case SYS_RECVMMSG: |
2502 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2503 | (struct timespec __user *)a[4]); | |
2504 | break; | |
de11defe UD |
2505 | case SYS_ACCEPT4: |
2506 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2507 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2508 | break; |
89bddce5 SH |
2509 | default: |
2510 | err = -EINVAL; | |
2511 | break; | |
1da177e4 LT |
2512 | } |
2513 | return err; | |
2514 | } | |
2515 | ||
89bddce5 | 2516 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2517 | |
55737fda SH |
2518 | /** |
2519 | * sock_register - add a socket protocol handler | |
2520 | * @ops: description of protocol | |
2521 | * | |
1da177e4 LT |
2522 | * This function is called by a protocol handler that wants to |
2523 | * advertise its address family, and have it linked into the | |
e793c0f7 | 2524 | * socket interface. The value ops->family corresponds to the |
55737fda | 2525 | * socket system call protocol family. |
1da177e4 | 2526 | */ |
f0fd27d4 | 2527 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2528 | { |
2529 | int err; | |
2530 | ||
2531 | if (ops->family >= NPROTO) { | |
3410f22e | 2532 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
1da177e4 LT |
2533 | return -ENOBUFS; |
2534 | } | |
55737fda SH |
2535 | |
2536 | spin_lock(&net_family_lock); | |
190683a9 ED |
2537 | if (rcu_dereference_protected(net_families[ops->family], |
2538 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2539 | err = -EEXIST; |
2540 | else { | |
cf778b00 | 2541 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2542 | err = 0; |
2543 | } | |
55737fda SH |
2544 | spin_unlock(&net_family_lock); |
2545 | ||
3410f22e | 2546 | pr_info("NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2547 | return err; |
2548 | } | |
c6d409cf | 2549 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2550 | |
55737fda SH |
2551 | /** |
2552 | * sock_unregister - remove a protocol handler | |
2553 | * @family: protocol family to remove | |
2554 | * | |
1da177e4 LT |
2555 | * This function is called by a protocol handler that wants to |
2556 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2557 | * new socket creation. |
2558 | * | |
2559 | * If protocol handler is a module, then it can use module reference | |
2560 | * counts to protect against new references. If protocol handler is not | |
2561 | * a module then it needs to provide its own protection in | |
2562 | * the ops->create routine. | |
1da177e4 | 2563 | */ |
f0fd27d4 | 2564 | void sock_unregister(int family) |
1da177e4 | 2565 | { |
f0fd27d4 | 2566 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2567 | |
55737fda | 2568 | spin_lock(&net_family_lock); |
a9b3cd7f | 2569 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2570 | spin_unlock(&net_family_lock); |
2571 | ||
2572 | synchronize_rcu(); | |
2573 | ||
3410f22e | 2574 | pr_info("NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2575 | } |
c6d409cf | 2576 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2577 | |
77d76ea3 | 2578 | static int __init sock_init(void) |
1da177e4 | 2579 | { |
b3e19d92 | 2580 | int err; |
2ca794e5 EB |
2581 | /* |
2582 | * Initialize the network sysctl infrastructure. | |
2583 | */ | |
2584 | err = net_sysctl_init(); | |
2585 | if (err) | |
2586 | goto out; | |
b3e19d92 | 2587 | |
1da177e4 | 2588 | /* |
89bddce5 | 2589 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2590 | */ |
2591 | skb_init(); | |
1da177e4 LT |
2592 | |
2593 | /* | |
89bddce5 | 2594 | * Initialize the protocols module. |
1da177e4 LT |
2595 | */ |
2596 | ||
2597 | init_inodecache(); | |
b3e19d92 NP |
2598 | |
2599 | err = register_filesystem(&sock_fs_type); | |
2600 | if (err) | |
2601 | goto out_fs; | |
1da177e4 | 2602 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2603 | if (IS_ERR(sock_mnt)) { |
2604 | err = PTR_ERR(sock_mnt); | |
2605 | goto out_mount; | |
2606 | } | |
77d76ea3 AK |
2607 | |
2608 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2609 | */ |
2610 | ||
2611 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2612 | err = netfilter_init(); |
2613 | if (err) | |
2614 | goto out; | |
1da177e4 | 2615 | #endif |
cbeb321a | 2616 | |
408eccce | 2617 | ptp_classifier_init(); |
c1f19b51 | 2618 | |
b3e19d92 NP |
2619 | out: |
2620 | return err; | |
2621 | ||
2622 | out_mount: | |
2623 | unregister_filesystem(&sock_fs_type); | |
2624 | out_fs: | |
2625 | goto out; | |
1da177e4 LT |
2626 | } |
2627 | ||
77d76ea3 AK |
2628 | core_initcall(sock_init); /* early initcall */ |
2629 | ||
1da177e4 LT |
2630 | #ifdef CONFIG_PROC_FS |
2631 | void socket_seq_show(struct seq_file *seq) | |
2632 | { | |
2633 | int cpu; | |
2634 | int counter = 0; | |
2635 | ||
6f912042 | 2636 | for_each_possible_cpu(cpu) |
89bddce5 | 2637 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2638 | |
2639 | /* It can be negative, by the way. 8) */ | |
2640 | if (counter < 0) | |
2641 | counter = 0; | |
2642 | ||
2643 | seq_printf(seq, "sockets: used %d\n", counter); | |
2644 | } | |
89bddce5 | 2645 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2646 | |
89bbfc95 | 2647 | #ifdef CONFIG_COMPAT |
6b96018b | 2648 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2649 | unsigned int cmd, void __user *up) |
7a229387 | 2650 | { |
7a229387 AB |
2651 | mm_segment_t old_fs = get_fs(); |
2652 | struct timeval ktv; | |
2653 | int err; | |
2654 | ||
2655 | set_fs(KERNEL_DS); | |
6b96018b | 2656 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2657 | set_fs(old_fs); |
644595f8 | 2658 | if (!err) |
ed6fe9d6 | 2659 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2660 | |
7a229387 AB |
2661 | return err; |
2662 | } | |
2663 | ||
6b96018b | 2664 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2665 | unsigned int cmd, void __user *up) |
7a229387 | 2666 | { |
7a229387 AB |
2667 | mm_segment_t old_fs = get_fs(); |
2668 | struct timespec kts; | |
2669 | int err; | |
2670 | ||
2671 | set_fs(KERNEL_DS); | |
6b96018b | 2672 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2673 | set_fs(old_fs); |
644595f8 | 2674 | if (!err) |
ed6fe9d6 | 2675 | err = compat_put_timespec(&kts, up); |
644595f8 | 2676 | |
7a229387 AB |
2677 | return err; |
2678 | } | |
2679 | ||
6b96018b | 2680 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2681 | { |
2682 | struct ifreq __user *uifr; | |
2683 | int err; | |
2684 | ||
2685 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2686 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2687 | return -EFAULT; |
2688 | ||
6b96018b | 2689 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2690 | if (err) |
2691 | return err; | |
2692 | ||
6b96018b | 2693 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2694 | return -EFAULT; |
2695 | ||
2696 | return 0; | |
2697 | } | |
2698 | ||
6b96018b | 2699 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2700 | { |
6b96018b | 2701 | struct compat_ifconf ifc32; |
7a229387 AB |
2702 | struct ifconf ifc; |
2703 | struct ifconf __user *uifc; | |
6b96018b | 2704 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2705 | struct ifreq __user *ifr; |
2706 | unsigned int i, j; | |
2707 | int err; | |
2708 | ||
6b96018b | 2709 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2710 | return -EFAULT; |
2711 | ||
43da5f2e | 2712 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2713 | if (ifc32.ifcbuf == 0) { |
2714 | ifc32.ifc_len = 0; | |
2715 | ifc.ifc_len = 0; | |
2716 | ifc.ifc_req = NULL; | |
2717 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2718 | } else { | |
c6d409cf ED |
2719 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2720 | sizeof(struct ifreq); | |
7a229387 AB |
2721 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2722 | ifc.ifc_len = len; | |
2723 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2724 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2725 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2726 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2727 | return -EFAULT; |
2728 | ifr++; | |
2729 | ifr32++; | |
2730 | } | |
2731 | } | |
2732 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2733 | return -EFAULT; | |
2734 | ||
6b96018b | 2735 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2736 | if (err) |
2737 | return err; | |
2738 | ||
2739 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2740 | return -EFAULT; | |
2741 | ||
2742 | ifr = ifc.ifc_req; | |
2743 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2744 | for (i = 0, j = 0; | |
c6d409cf ED |
2745 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2746 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2747 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2748 | return -EFAULT; |
2749 | ifr32++; | |
2750 | ifr++; | |
2751 | } | |
2752 | ||
2753 | if (ifc32.ifcbuf == 0) { | |
2754 | /* Translate from 64-bit structure multiple to | |
2755 | * a 32-bit one. | |
2756 | */ | |
2757 | i = ifc.ifc_len; | |
6b96018b | 2758 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2759 | ifc32.ifc_len = i; |
2760 | } else { | |
2761 | ifc32.ifc_len = i; | |
2762 | } | |
6b96018b | 2763 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2764 | return -EFAULT; |
2765 | ||
2766 | return 0; | |
2767 | } | |
2768 | ||
6b96018b | 2769 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2770 | { |
3a7da39d BH |
2771 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2772 | bool convert_in = false, convert_out = false; | |
2773 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2774 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2775 | struct ifreq __user *ifr; |
3a7da39d BH |
2776 | u32 rule_cnt = 0, actual_rule_cnt; |
2777 | u32 ethcmd; | |
7a229387 | 2778 | u32 data; |
3a7da39d | 2779 | int ret; |
7a229387 | 2780 | |
3a7da39d BH |
2781 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2782 | return -EFAULT; | |
7a229387 | 2783 | |
3a7da39d BH |
2784 | compat_rxnfc = compat_ptr(data); |
2785 | ||
2786 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2787 | return -EFAULT; |
2788 | ||
3a7da39d BH |
2789 | /* Most ethtool structures are defined without padding. |
2790 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2791 | */ | |
2792 | switch (ethcmd) { | |
2793 | default: | |
2794 | break; | |
2795 | case ETHTOOL_GRXCLSRLALL: | |
2796 | /* Buffer size is variable */ | |
2797 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2798 | return -EFAULT; | |
2799 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2800 | return -ENOMEM; | |
2801 | buf_size += rule_cnt * sizeof(u32); | |
2802 | /* fall through */ | |
2803 | case ETHTOOL_GRXRINGS: | |
2804 | case ETHTOOL_GRXCLSRLCNT: | |
2805 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2806 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2807 | convert_out = true; |
2808 | /* fall through */ | |
2809 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2810 | buf_size += sizeof(struct ethtool_rxnfc); |
2811 | convert_in = true; | |
2812 | break; | |
2813 | } | |
2814 | ||
2815 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2816 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2817 | |
2818 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2819 | return -EFAULT; |
2820 | ||
3a7da39d BH |
2821 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2822 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2823 | return -EFAULT; |
2824 | ||
3a7da39d | 2825 | if (convert_in) { |
127fe533 | 2826 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2827 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2828 | */ | |
127fe533 AD |
2829 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2830 | sizeof(compat_rxnfc->fs.m_ext) != | |
2831 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2832 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2833 | BUILD_BUG_ON( |
2834 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2835 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2836 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2837 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2838 | ||
2839 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2840 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2841 | (void __user *)rxnfc) || | |
3a7da39d BH |
2842 | copy_in_user(&rxnfc->fs.ring_cookie, |
2843 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2844 | (void __user *)(&rxnfc->fs.location + 1) - |
2845 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2846 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2847 | sizeof(rxnfc->rule_cnt))) | |
2848 | return -EFAULT; | |
2849 | } | |
2850 | ||
2851 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2852 | if (ret) | |
2853 | return ret; | |
2854 | ||
2855 | if (convert_out) { | |
2856 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2857 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2858 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2859 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2860 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2861 | (const void __user *)(&rxnfc->fs.location + 1) - |
2862 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2863 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2864 | sizeof(rxnfc->rule_cnt))) | |
2865 | return -EFAULT; | |
2866 | ||
2867 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2868 | /* As an optimisation, we only copy the actual | |
2869 | * number of rules that the underlying | |
2870 | * function returned. Since Mallory might | |
2871 | * change the rule count in user memory, we | |
2872 | * check that it is less than the rule count | |
2873 | * originally given (as the user buffer size), | |
2874 | * which has been range-checked. | |
2875 | */ | |
2876 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2877 | return -EFAULT; | |
2878 | if (actual_rule_cnt < rule_cnt) | |
2879 | rule_cnt = actual_rule_cnt; | |
2880 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2881 | &rxnfc->rule_locs[0], | |
2882 | rule_cnt * sizeof(u32))) | |
2883 | return -EFAULT; | |
2884 | } | |
2885 | } | |
2886 | ||
2887 | return 0; | |
7a229387 AB |
2888 | } |
2889 | ||
7a50a240 AB |
2890 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2891 | { | |
2892 | void __user *uptr; | |
2893 | compat_uptr_t uptr32; | |
2894 | struct ifreq __user *uifr; | |
2895 | ||
c6d409cf | 2896 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2897 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2898 | return -EFAULT; | |
2899 | ||
2900 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2901 | return -EFAULT; | |
2902 | ||
2903 | uptr = compat_ptr(uptr32); | |
2904 | ||
2905 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2906 | return -EFAULT; | |
2907 | ||
2908 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2909 | } | |
2910 | ||
6b96018b AB |
2911 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2912 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2913 | { |
2914 | struct ifreq kifr; | |
7a229387 AB |
2915 | mm_segment_t old_fs; |
2916 | int err; | |
7a229387 AB |
2917 | |
2918 | switch (cmd) { | |
2919 | case SIOCBONDENSLAVE: | |
2920 | case SIOCBONDRELEASE: | |
2921 | case SIOCBONDSETHWADDR: | |
2922 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2923 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2924 | return -EFAULT; |
2925 | ||
2926 | old_fs = get_fs(); | |
c6d409cf | 2927 | set_fs(KERNEL_DS); |
c3f52ae6 | 2928 | err = dev_ioctl(net, cmd, |
2929 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2930 | set_fs(old_fs); |
7a229387 AB |
2931 | |
2932 | return err; | |
7a229387 | 2933 | default: |
07d106d0 | 2934 | return -ENOIOCTLCMD; |
ccbd6a5a | 2935 | } |
7a229387 AB |
2936 | } |
2937 | ||
590d4693 BH |
2938 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
2939 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, | |
6b96018b | 2940 | struct compat_ifreq __user *u_ifreq32) |
7a229387 AB |
2941 | { |
2942 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2943 | char tmp_buf[IFNAMSIZ]; |
2944 | void __user *data64; | |
2945 | u32 data32; | |
2946 | ||
2947 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2948 | IFNAMSIZ)) | |
2949 | return -EFAULT; | |
417c3522 | 2950 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
7a229387 AB |
2951 | return -EFAULT; |
2952 | data64 = compat_ptr(data32); | |
2953 | ||
2954 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2955 | ||
7a229387 AB |
2956 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
2957 | IFNAMSIZ)) | |
2958 | return -EFAULT; | |
417c3522 | 2959 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
7a229387 AB |
2960 | return -EFAULT; |
2961 | ||
6b96018b | 2962 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2963 | } |
2964 | ||
6b96018b AB |
2965 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2966 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2967 | { |
a2116ed2 | 2968 | struct ifreq __user *uifr; |
7a229387 AB |
2969 | int err; |
2970 | ||
a2116ed2 AB |
2971 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2972 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2973 | return -EFAULT; | |
2974 | ||
2975 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2976 | ||
7a229387 AB |
2977 | if (!err) { |
2978 | switch (cmd) { | |
2979 | case SIOCGIFFLAGS: | |
2980 | case SIOCGIFMETRIC: | |
2981 | case SIOCGIFMTU: | |
2982 | case SIOCGIFMEM: | |
2983 | case SIOCGIFHWADDR: | |
2984 | case SIOCGIFINDEX: | |
2985 | case SIOCGIFADDR: | |
2986 | case SIOCGIFBRDADDR: | |
2987 | case SIOCGIFDSTADDR: | |
2988 | case SIOCGIFNETMASK: | |
fab2532b | 2989 | case SIOCGIFPFLAGS: |
7a229387 | 2990 | case SIOCGIFTXQLEN: |
fab2532b AB |
2991 | case SIOCGMIIPHY: |
2992 | case SIOCGMIIREG: | |
a2116ed2 | 2993 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2994 | err = -EFAULT; |
2995 | break; | |
2996 | } | |
2997 | } | |
2998 | return err; | |
2999 | } | |
3000 | ||
a2116ed2 AB |
3001 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3002 | struct compat_ifreq __user *uifr32) | |
3003 | { | |
3004 | struct ifreq ifr; | |
3005 | struct compat_ifmap __user *uifmap32; | |
3006 | mm_segment_t old_fs; | |
3007 | int err; | |
3008 | ||
3009 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3010 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3011 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3012 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3013 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3014 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3015 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3016 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3017 | if (err) |
3018 | return -EFAULT; | |
3019 | ||
3020 | old_fs = get_fs(); | |
c6d409cf | 3021 | set_fs(KERNEL_DS); |
c3f52ae6 | 3022 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3023 | set_fs(old_fs); |
a2116ed2 AB |
3024 | |
3025 | if (cmd == SIOCGIFMAP && !err) { | |
3026 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3027 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3028 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3029 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3030 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3031 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3032 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3033 | if (err) |
3034 | err = -EFAULT; | |
3035 | } | |
3036 | return err; | |
3037 | } | |
3038 | ||
7a229387 | 3039 | struct rtentry32 { |
c6d409cf | 3040 | u32 rt_pad1; |
7a229387 AB |
3041 | struct sockaddr rt_dst; /* target address */ |
3042 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3043 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3044 | unsigned short rt_flags; |
3045 | short rt_pad2; | |
3046 | u32 rt_pad3; | |
3047 | unsigned char rt_tos; | |
3048 | unsigned char rt_class; | |
3049 | short rt_pad4; | |
3050 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3051 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3052 | u32 rt_mtu; /* per route MTU/Window */ |
3053 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3054 | unsigned short rt_irtt; /* Initial RTT */ |
3055 | }; | |
3056 | ||
3057 | struct in6_rtmsg32 { | |
3058 | struct in6_addr rtmsg_dst; | |
3059 | struct in6_addr rtmsg_src; | |
3060 | struct in6_addr rtmsg_gateway; | |
3061 | u32 rtmsg_type; | |
3062 | u16 rtmsg_dst_len; | |
3063 | u16 rtmsg_src_len; | |
3064 | u32 rtmsg_metric; | |
3065 | u32 rtmsg_info; | |
3066 | u32 rtmsg_flags; | |
3067 | s32 rtmsg_ifindex; | |
3068 | }; | |
3069 | ||
6b96018b AB |
3070 | static int routing_ioctl(struct net *net, struct socket *sock, |
3071 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3072 | { |
3073 | int ret; | |
3074 | void *r = NULL; | |
3075 | struct in6_rtmsg r6; | |
3076 | struct rtentry r4; | |
3077 | char devname[16]; | |
3078 | u32 rtdev; | |
3079 | mm_segment_t old_fs = get_fs(); | |
3080 | ||
6b96018b AB |
3081 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3082 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3083 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3084 | 3 * sizeof(struct in6_addr)); |
3ddc5b46 MD |
3085 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3086 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3087 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3088 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3089 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3090 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3091 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3092 | |
3093 | r = (void *) &r6; | |
3094 | } else { /* ipv4 */ | |
6b96018b | 3095 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3096 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3097 | 3 * sizeof(struct sockaddr)); |
3ddc5b46 MD |
3098 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
3099 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3100 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3101 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); | |
3102 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3103 | ret |= get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3104 | if (rtdev) { |
c6d409cf | 3105 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3106 | r4.rt_dev = (char __user __force *)devname; |
3107 | devname[15] = 0; | |
7a229387 AB |
3108 | } else |
3109 | r4.rt_dev = NULL; | |
3110 | ||
3111 | r = (void *) &r4; | |
3112 | } | |
3113 | ||
3114 | if (ret) { | |
3115 | ret = -EFAULT; | |
3116 | goto out; | |
3117 | } | |
3118 | ||
c6d409cf | 3119 | set_fs(KERNEL_DS); |
6b96018b | 3120 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3121 | set_fs(old_fs); |
7a229387 AB |
3122 | |
3123 | out: | |
7a229387 AB |
3124 | return ret; |
3125 | } | |
3126 | ||
3127 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3128 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3129 | * use compatible ioctls |
7a229387 | 3130 | */ |
6b96018b | 3131 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3132 | { |
6b96018b | 3133 | compat_ulong_t tmp; |
7a229387 | 3134 | |
6b96018b | 3135 | if (get_user(tmp, argp)) |
7a229387 AB |
3136 | return -EFAULT; |
3137 | if (tmp == BRCTL_GET_VERSION) | |
3138 | return BRCTL_VERSION + 1; | |
3139 | return -EINVAL; | |
3140 | } | |
3141 | ||
6b96018b AB |
3142 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3143 | unsigned int cmd, unsigned long arg) | |
3144 | { | |
3145 | void __user *argp = compat_ptr(arg); | |
3146 | struct sock *sk = sock->sk; | |
3147 | struct net *net = sock_net(sk); | |
7a229387 | 3148 | |
6b96018b | 3149 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693 | 3150 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3151 | |
3152 | switch (cmd) { | |
3153 | case SIOCSIFBR: | |
3154 | case SIOCGIFBR: | |
3155 | return old_bridge_ioctl(argp); | |
3156 | case SIOCGIFNAME: | |
3157 | return dev_ifname32(net, argp); | |
3158 | case SIOCGIFCONF: | |
3159 | return dev_ifconf(net, argp); | |
3160 | case SIOCETHTOOL: | |
3161 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3162 | case SIOCWANDEV: |
3163 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3164 | case SIOCGIFMAP: |
3165 | case SIOCSIFMAP: | |
3166 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3167 | case SIOCBONDENSLAVE: |
3168 | case SIOCBONDRELEASE: | |
3169 | case SIOCBONDSETHWADDR: | |
6b96018b AB |
3170 | case SIOCBONDCHANGEACTIVE: |
3171 | return bond_ioctl(net, cmd, argp); | |
3172 | case SIOCADDRT: | |
3173 | case SIOCDELRT: | |
3174 | return routing_ioctl(net, sock, cmd, argp); | |
3175 | case SIOCGSTAMP: | |
3176 | return do_siocgstamp(net, sock, cmd, argp); | |
3177 | case SIOCGSTAMPNS: | |
3178 | return do_siocgstampns(net, sock, cmd, argp); | |
590d4693 BH |
3179 | case SIOCBONDSLAVEINFOQUERY: |
3180 | case SIOCBONDINFOQUERY: | |
a2116ed2 | 3181 | case SIOCSHWTSTAMP: |
fd468c74 | 3182 | case SIOCGHWTSTAMP: |
590d4693 | 3183 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3184 | |
3185 | case FIOSETOWN: | |
3186 | case SIOCSPGRP: | |
3187 | case FIOGETOWN: | |
3188 | case SIOCGPGRP: | |
3189 | case SIOCBRADDBR: | |
3190 | case SIOCBRDELBR: | |
3191 | case SIOCGIFVLAN: | |
3192 | case SIOCSIFVLAN: | |
3193 | case SIOCADDDLCI: | |
3194 | case SIOCDELDLCI: | |
3195 | return sock_ioctl(file, cmd, arg); | |
3196 | ||
3197 | case SIOCGIFFLAGS: | |
3198 | case SIOCSIFFLAGS: | |
3199 | case SIOCGIFMETRIC: | |
3200 | case SIOCSIFMETRIC: | |
3201 | case SIOCGIFMTU: | |
3202 | case SIOCSIFMTU: | |
3203 | case SIOCGIFMEM: | |
3204 | case SIOCSIFMEM: | |
3205 | case SIOCGIFHWADDR: | |
3206 | case SIOCSIFHWADDR: | |
3207 | case SIOCADDMULTI: | |
3208 | case SIOCDELMULTI: | |
3209 | case SIOCGIFINDEX: | |
6b96018b AB |
3210 | case SIOCGIFADDR: |
3211 | case SIOCSIFADDR: | |
3212 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3213 | case SIOCDIFADDR: |
6b96018b AB |
3214 | case SIOCGIFBRDADDR: |
3215 | case SIOCSIFBRDADDR: | |
3216 | case SIOCGIFDSTADDR: | |
3217 | case SIOCSIFDSTADDR: | |
3218 | case SIOCGIFNETMASK: | |
3219 | case SIOCSIFNETMASK: | |
3220 | case SIOCSIFPFLAGS: | |
3221 | case SIOCGIFPFLAGS: | |
3222 | case SIOCGIFTXQLEN: | |
3223 | case SIOCSIFTXQLEN: | |
3224 | case SIOCBRADDIF: | |
3225 | case SIOCBRDELIF: | |
9177efd3 AB |
3226 | case SIOCSIFNAME: |
3227 | case SIOCGMIIPHY: | |
3228 | case SIOCGMIIREG: | |
3229 | case SIOCSMIIREG: | |
6b96018b | 3230 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3231 | |
6b96018b AB |
3232 | case SIOCSARP: |
3233 | case SIOCGARP: | |
3234 | case SIOCDARP: | |
6b96018b | 3235 | case SIOCATMARK: |
9177efd3 AB |
3236 | return sock_do_ioctl(net, sock, cmd, arg); |
3237 | } | |
3238 | ||
6b96018b AB |
3239 | return -ENOIOCTLCMD; |
3240 | } | |
7a229387 | 3241 | |
95c96174 | 3242 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3243 | unsigned long arg) |
89bbfc95 SP |
3244 | { |
3245 | struct socket *sock = file->private_data; | |
3246 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3247 | struct sock *sk; |
3248 | struct net *net; | |
3249 | ||
3250 | sk = sock->sk; | |
3251 | net = sock_net(sk); | |
89bbfc95 SP |
3252 | |
3253 | if (sock->ops->compat_ioctl) | |
3254 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3255 | ||
87de87d5 DM |
3256 | if (ret == -ENOIOCTLCMD && |
3257 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3258 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3259 | ||
6b96018b AB |
3260 | if (ret == -ENOIOCTLCMD) |
3261 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3262 | ||
89bbfc95 SP |
3263 | return ret; |
3264 | } | |
3265 | #endif | |
3266 | ||
ac5a488e SS |
3267 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3268 | { | |
3269 | return sock->ops->bind(sock, addr, addrlen); | |
3270 | } | |
c6d409cf | 3271 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3272 | |
3273 | int kernel_listen(struct socket *sock, int backlog) | |
3274 | { | |
3275 | return sock->ops->listen(sock, backlog); | |
3276 | } | |
c6d409cf | 3277 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3278 | |
3279 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3280 | { | |
3281 | struct sock *sk = sock->sk; | |
3282 | int err; | |
3283 | ||
3284 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3285 | newsock); | |
3286 | if (err < 0) | |
3287 | goto done; | |
3288 | ||
3289 | err = sock->ops->accept(sock, *newsock, flags); | |
3290 | if (err < 0) { | |
3291 | sock_release(*newsock); | |
fa8705b0 | 3292 | *newsock = NULL; |
ac5a488e SS |
3293 | goto done; |
3294 | } | |
3295 | ||
3296 | (*newsock)->ops = sock->ops; | |
1b08534e | 3297 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3298 | |
3299 | done: | |
3300 | return err; | |
3301 | } | |
c6d409cf | 3302 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3303 | |
3304 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3305 | int flags) |
ac5a488e SS |
3306 | { |
3307 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3308 | } | |
c6d409cf | 3309 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3310 | |
3311 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3312 | int *addrlen) | |
3313 | { | |
3314 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3315 | } | |
c6d409cf | 3316 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3317 | |
3318 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3319 | int *addrlen) | |
3320 | { | |
3321 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3322 | } | |
c6d409cf | 3323 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3324 | |
3325 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3326 | char *optval, int *optlen) | |
3327 | { | |
3328 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3329 | char __user *uoptval; |
3330 | int __user *uoptlen; | |
ac5a488e SS |
3331 | int err; |
3332 | ||
fb8621bb NK |
3333 | uoptval = (char __user __force *) optval; |
3334 | uoptlen = (int __user __force *) optlen; | |
3335 | ||
ac5a488e SS |
3336 | set_fs(KERNEL_DS); |
3337 | if (level == SOL_SOCKET) | |
fb8621bb | 3338 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3339 | else |
fb8621bb NK |
3340 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3341 | uoptlen); | |
ac5a488e SS |
3342 | set_fs(oldfs); |
3343 | return err; | |
3344 | } | |
c6d409cf | 3345 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3346 | |
3347 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3348 | char *optval, unsigned int optlen) |
ac5a488e SS |
3349 | { |
3350 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3351 | char __user *uoptval; |
ac5a488e SS |
3352 | int err; |
3353 | ||
fb8621bb NK |
3354 | uoptval = (char __user __force *) optval; |
3355 | ||
ac5a488e SS |
3356 | set_fs(KERNEL_DS); |
3357 | if (level == SOL_SOCKET) | |
fb8621bb | 3358 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3359 | else |
fb8621bb | 3360 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3361 | optlen); |
3362 | set_fs(oldfs); | |
3363 | return err; | |
3364 | } | |
c6d409cf | 3365 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3366 | |
3367 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3368 | size_t size, int flags) | |
3369 | { | |
3370 | if (sock->ops->sendpage) | |
3371 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3372 | ||
3373 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3374 | } | |
c6d409cf | 3375 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3376 | |
3377 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3378 | { | |
3379 | mm_segment_t oldfs = get_fs(); | |
3380 | int err; | |
3381 | ||
3382 | set_fs(KERNEL_DS); | |
3383 | err = sock->ops->ioctl(sock, cmd, arg); | |
3384 | set_fs(oldfs); | |
3385 | ||
3386 | return err; | |
3387 | } | |
c6d409cf | 3388 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3389 | |
91cf45f0 TM |
3390 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3391 | { | |
3392 | return sock->ops->shutdown(sock, how); | |
3393 | } | |
91cf45f0 | 3394 | EXPORT_SYMBOL(kernel_sock_shutdown); |