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 LT |
72 | #include <linux/wanrouter.h> |
73 | #include <linux/if_bridge.h> | |
20380731 ACM |
74 | #include <linux/if_frad.h> |
75 | #include <linux/if_vlan.h> | |
1da177e4 LT |
76 | #include <linux/init.h> |
77 | #include <linux/poll.h> | |
78 | #include <linux/cache.h> | |
79 | #include <linux/module.h> | |
80 | #include <linux/highmem.h> | |
1da177e4 LT |
81 | #include <linux/mount.h> |
82 | #include <linux/security.h> | |
83 | #include <linux/syscalls.h> | |
84 | #include <linux/compat.h> | |
85 | #include <linux/kmod.h> | |
3ec3b2fb | 86 | #include <linux/audit.h> |
d86b5e0e | 87 | #include <linux/wireless.h> |
1b8d7ae4 | 88 | #include <linux/nsproxy.h> |
1fd7317d | 89 | #include <linux/magic.h> |
5a0e3ad6 | 90 | #include <linux/slab.h> |
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> | |
108 | ||
1da177e4 | 109 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
110 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
111 | unsigned long nr_segs, loff_t pos); | |
112 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
113 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 114 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
115 | |
116 | static int sock_close(struct inode *inode, struct file *file); | |
117 | static unsigned int sock_poll(struct file *file, | |
118 | struct poll_table_struct *wait); | |
89bddce5 | 119 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
120 | #ifdef CONFIG_COMPAT |
121 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 122 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 123 | #endif |
1da177e4 | 124 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
125 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
126 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 127 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 128 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 129 | unsigned int flags); |
1da177e4 | 130 | |
1da177e4 LT |
131 | /* |
132 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
133 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
134 | */ | |
135 | ||
da7071d7 | 136 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
137 | .owner = THIS_MODULE, |
138 | .llseek = no_llseek, | |
139 | .aio_read = sock_aio_read, | |
140 | .aio_write = sock_aio_write, | |
141 | .poll = sock_poll, | |
142 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
143 | #ifdef CONFIG_COMPAT |
144 | .compat_ioctl = compat_sock_ioctl, | |
145 | #endif | |
1da177e4 LT |
146 | .mmap = sock_mmap, |
147 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
148 | .release = sock_close, | |
149 | .fasync = sock_fasync, | |
5274f052 JA |
150 | .sendpage = sock_sendpage, |
151 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 152 | .splice_read = sock_splice_read, |
1da177e4 LT |
153 | }; |
154 | ||
155 | /* | |
156 | * The protocol list. Each protocol is registered in here. | |
157 | */ | |
158 | ||
1da177e4 | 159 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 160 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 161 | |
1da177e4 LT |
162 | /* |
163 | * Statistics counters of the socket lists | |
164 | */ | |
165 | ||
c6d409cf | 166 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
167 | |
168 | /* | |
89bddce5 SH |
169 | * Support routines. |
170 | * Move socket addresses back and forth across the kernel/user | |
171 | * divide and look after the messy bits. | |
1da177e4 LT |
172 | */ |
173 | ||
1da177e4 LT |
174 | /** |
175 | * move_addr_to_kernel - copy a socket address into kernel space | |
176 | * @uaddr: Address in user space | |
177 | * @kaddr: Address in kernel space | |
178 | * @ulen: Length in user space | |
179 | * | |
180 | * The address is copied into kernel space. If the provided address is | |
181 | * too long an error code of -EINVAL is returned. If the copy gives | |
182 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
183 | */ | |
184 | ||
43db362d | 185 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 186 | { |
230b1839 | 187 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 188 | return -EINVAL; |
89bddce5 | 189 | if (ulen == 0) |
1da177e4 | 190 | return 0; |
89bddce5 | 191 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 192 | return -EFAULT; |
3ec3b2fb | 193 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
194 | } |
195 | ||
196 | /** | |
197 | * move_addr_to_user - copy an address to user space | |
198 | * @kaddr: kernel space address | |
199 | * @klen: length of address in kernel | |
200 | * @uaddr: user space address | |
201 | * @ulen: pointer to user length field | |
202 | * | |
203 | * The value pointed to by ulen on entry is the buffer length available. | |
204 | * This is overwritten with the buffer space used. -EINVAL is returned | |
205 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
206 | * is returned if either the buffer or the length field are not | |
207 | * accessible. | |
208 | * After copying the data up to the limit the user specifies, the true | |
209 | * length of the data is written over the length limit the user | |
210 | * specified. Zero is returned for a success. | |
211 | */ | |
89bddce5 | 212 | |
43db362d | 213 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 214 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
215 | { |
216 | int err; | |
217 | int len; | |
218 | ||
89bddce5 SH |
219 | err = get_user(len, ulen); |
220 | if (err) | |
1da177e4 | 221 | return err; |
89bddce5 SH |
222 | if (len > klen) |
223 | len = klen; | |
230b1839 | 224 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 225 | return -EINVAL; |
89bddce5 | 226 | if (len) { |
d6fe3945 SG |
227 | if (audit_sockaddr(klen, kaddr)) |
228 | return -ENOMEM; | |
89bddce5 | 229 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
230 | return -EFAULT; |
231 | } | |
232 | /* | |
89bddce5 SH |
233 | * "fromlen shall refer to the value before truncation.." |
234 | * 1003.1g | |
1da177e4 LT |
235 | */ |
236 | return __put_user(klen, ulen); | |
237 | } | |
238 | ||
e18b890b | 239 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
240 | |
241 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
242 | { | |
243 | struct socket_alloc *ei; | |
eaefd110 | 244 | struct socket_wq *wq; |
89bddce5 | 245 | |
e94b1766 | 246 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
247 | if (!ei) |
248 | return NULL; | |
eaefd110 ED |
249 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
250 | if (!wq) { | |
43815482 ED |
251 | kmem_cache_free(sock_inode_cachep, ei); |
252 | return NULL; | |
253 | } | |
eaefd110 ED |
254 | init_waitqueue_head(&wq->wait); |
255 | wq->fasync_list = NULL; | |
256 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 257 | |
1da177e4 LT |
258 | ei->socket.state = SS_UNCONNECTED; |
259 | ei->socket.flags = 0; | |
260 | ei->socket.ops = NULL; | |
261 | ei->socket.sk = NULL; | |
262 | ei->socket.file = NULL; | |
1da177e4 LT |
263 | |
264 | return &ei->vfs_inode; | |
265 | } | |
266 | ||
267 | static void sock_destroy_inode(struct inode *inode) | |
268 | { | |
43815482 | 269 | struct socket_alloc *ei; |
eaefd110 | 270 | struct socket_wq *wq; |
43815482 ED |
271 | |
272 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 273 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 274 | kfree_rcu(wq, rcu); |
43815482 | 275 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
276 | } |
277 | ||
51cc5068 | 278 | static void init_once(void *foo) |
1da177e4 | 279 | { |
89bddce5 | 280 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 281 | |
a35afb83 | 282 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 283 | } |
89bddce5 | 284 | |
1da177e4 LT |
285 | static int init_inodecache(void) |
286 | { | |
287 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
288 | sizeof(struct socket_alloc), |
289 | 0, | |
290 | (SLAB_HWCACHE_ALIGN | | |
291 | SLAB_RECLAIM_ACCOUNT | | |
292 | SLAB_MEM_SPREAD), | |
20c2df83 | 293 | init_once); |
1da177e4 LT |
294 | if (sock_inode_cachep == NULL) |
295 | return -ENOMEM; | |
296 | return 0; | |
297 | } | |
298 | ||
b87221de | 299 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
300 | .alloc_inode = sock_alloc_inode, |
301 | .destroy_inode = sock_destroy_inode, | |
302 | .statfs = simple_statfs, | |
1da177e4 LT |
303 | }; |
304 | ||
c23fbb6b ED |
305 | /* |
306 | * sockfs_dname() is called from d_path(). | |
307 | */ | |
308 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
309 | { | |
310 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
311 | dentry->d_inode->i_ino); | |
312 | } | |
313 | ||
3ba13d17 | 314 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 315 | .d_dname = sockfs_dname, |
1da177e4 LT |
316 | }; |
317 | ||
c74a1cbb AV |
318 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
319 | int flags, const char *dev_name, void *data) | |
320 | { | |
321 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
322 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
323 | } | |
324 | ||
325 | static struct vfsmount *sock_mnt __read_mostly; | |
326 | ||
327 | static struct file_system_type sock_fs_type = { | |
328 | .name = "sockfs", | |
329 | .mount = sockfs_mount, | |
330 | .kill_sb = kill_anon_super, | |
331 | }; | |
332 | ||
1da177e4 LT |
333 | /* |
334 | * Obtains the first available file descriptor and sets it up for use. | |
335 | * | |
39d8c1b6 DM |
336 | * These functions create file structures and maps them to fd space |
337 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
338 | * and file struct implicitly stored in sock->file. |
339 | * Note that another thread may close file descriptor before we return | |
340 | * from this function. We use the fact that now we do not refer | |
341 | * to socket after mapping. If one day we will need it, this | |
342 | * function will increment ref. count on file by 1. | |
343 | * | |
344 | * In any case returned fd MAY BE not valid! | |
345 | * This race condition is unavoidable | |
346 | * with shared fd spaces, we cannot solve it inside kernel, | |
347 | * but we take care of internal coherence yet. | |
348 | */ | |
349 | ||
600e1779 MY |
350 | static int sock_alloc_file(struct socket *sock, struct file **f, int flags, |
351 | const char *dname) | |
1da177e4 | 352 | { |
7cbe66b6 | 353 | struct qstr name = { .name = "" }; |
2c48b9c4 | 354 | struct path path; |
7cbe66b6 | 355 | struct file *file; |
1da177e4 | 356 | int fd; |
1da177e4 | 357 | |
a677a039 | 358 | fd = get_unused_fd_flags(flags); |
7cbe66b6 AV |
359 | if (unlikely(fd < 0)) |
360 | return fd; | |
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); |
2c48b9c4 | 370 | if (unlikely(!path.dentry)) { |
7cbe66b6 | 371 | put_unused_fd(fd); |
39d8c1b6 | 372 | return -ENOMEM; |
7cbe66b6 | 373 | } |
2c48b9c4 | 374 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 375 | |
2c48b9c4 | 376 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 377 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 378 | |
2c48b9c4 | 379 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 380 | &socket_file_ops); |
cc3808f8 AV |
381 | if (unlikely(!file)) { |
382 | /* drop dentry, keep inode */ | |
7de9c6ee | 383 | ihold(path.dentry->d_inode); |
2c48b9c4 | 384 | path_put(&path); |
cc3808f8 AV |
385 | put_unused_fd(fd); |
386 | return -ENFILE; | |
387 | } | |
388 | ||
389 | sock->file = file; | |
77d27200 | 390 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
391 | file->f_pos = 0; |
392 | file->private_data = sock; | |
1da177e4 | 393 | |
7cbe66b6 AV |
394 | *f = file; |
395 | return fd; | |
39d8c1b6 DM |
396 | } |
397 | ||
a677a039 | 398 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
399 | { |
400 | struct file *newfile; | |
600e1779 | 401 | int fd = sock_alloc_file(sock, &newfile, flags, NULL); |
39d8c1b6 | 402 | |
7cbe66b6 | 403 | if (likely(fd >= 0)) |
39d8c1b6 | 404 | fd_install(fd, newfile); |
7cbe66b6 | 405 | |
1da177e4 LT |
406 | return fd; |
407 | } | |
c6d409cf | 408 | EXPORT_SYMBOL(sock_map_fd); |
1da177e4 | 409 | |
406a3c63 | 410 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 411 | { |
6cb153ca BL |
412 | if (file->f_op == &socket_file_ops) |
413 | return file->private_data; /* set in sock_map_fd */ | |
414 | ||
23bb80d2 ED |
415 | *err = -ENOTSOCK; |
416 | return NULL; | |
6cb153ca | 417 | } |
406a3c63 | 418 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 419 | |
1da177e4 | 420 | /** |
c6d409cf | 421 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
422 | * @fd: file handle |
423 | * @err: pointer to an error code return | |
424 | * | |
425 | * The file handle passed in is locked and the socket it is bound | |
426 | * too is returned. If an error occurs the err pointer is overwritten | |
427 | * with a negative errno code and NULL is returned. The function checks | |
428 | * for both invalid handles and passing a handle which is not a socket. | |
429 | * | |
430 | * On a success the socket object pointer is returned. | |
431 | */ | |
432 | ||
433 | struct socket *sockfd_lookup(int fd, int *err) | |
434 | { | |
435 | struct file *file; | |
1da177e4 LT |
436 | struct socket *sock; |
437 | ||
89bddce5 SH |
438 | file = fget(fd); |
439 | if (!file) { | |
1da177e4 LT |
440 | *err = -EBADF; |
441 | return NULL; | |
442 | } | |
89bddce5 | 443 | |
6cb153ca BL |
444 | sock = sock_from_file(file, err); |
445 | if (!sock) | |
1da177e4 | 446 | fput(file); |
6cb153ca BL |
447 | return sock; |
448 | } | |
c6d409cf | 449 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 450 | |
6cb153ca BL |
451 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
452 | { | |
453 | struct file *file; | |
454 | struct socket *sock; | |
455 | ||
3672558c | 456 | *err = -EBADF; |
6cb153ca BL |
457 | file = fget_light(fd, fput_needed); |
458 | if (file) { | |
459 | sock = sock_from_file(file, err); | |
460 | if (sock) | |
461 | return sock; | |
462 | fput_light(file, *fput_needed); | |
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 | ||
559 | /* | |
560 | * In theory you can't get an open on this inode, but /proc provides | |
561 | * a back door. Remember to keep it shut otherwise you'll let the | |
562 | * creepy crawlies in. | |
563 | */ | |
89bddce5 | 564 | |
1da177e4 LT |
565 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
566 | { | |
567 | return -ENXIO; | |
568 | } | |
569 | ||
4b6f5d20 | 570 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
571 | .owner = THIS_MODULE, |
572 | .open = sock_no_open, | |
6038f373 | 573 | .llseek = noop_llseek, |
1da177e4 LT |
574 | }; |
575 | ||
576 | /** | |
577 | * sock_release - close a socket | |
578 | * @sock: socket to close | |
579 | * | |
580 | * The socket is released from the protocol stack if it has a release | |
581 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 582 | * an inode not a file. |
1da177e4 | 583 | */ |
89bddce5 | 584 | |
1da177e4 LT |
585 | void sock_release(struct socket *sock) |
586 | { | |
587 | if (sock->ops) { | |
588 | struct module *owner = sock->ops->owner; | |
589 | ||
590 | sock->ops->release(sock); | |
591 | sock->ops = NULL; | |
592 | module_put(owner); | |
593 | } | |
594 | ||
eaefd110 | 595 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
1da177e4 LT |
596 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
597 | ||
b09e786b MP |
598 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
599 | return; | |
600 | ||
19e8d69c | 601 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
602 | if (!sock->file) { |
603 | iput(SOCK_INODE(sock)); | |
604 | return; | |
605 | } | |
89bddce5 | 606 | sock->file = NULL; |
1da177e4 | 607 | } |
c6d409cf | 608 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 609 | |
2244d07b | 610 | int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 611 | { |
2244d07b | 612 | *tx_flags = 0; |
20d49473 | 613 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 614 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 615 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 616 | *tx_flags |= SKBTX_SW_TSTAMP; |
6e3e939f JB |
617 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
618 | *tx_flags |= SKBTX_WIFI_STATUS; | |
20d49473 PO |
619 | return 0; |
620 | } | |
621 | EXPORT_SYMBOL(sock_tx_timestamp); | |
622 | ||
228e548e AB |
623 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
624 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
625 | { |
626 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 | 627 | |
f8451725 HX |
628 | sock_update_classid(sock->sk); |
629 | ||
1da177e4 LT |
630 | si->sock = sock; |
631 | si->scm = NULL; | |
632 | si->msg = msg; | |
633 | si->size = size; | |
634 | ||
1da177e4 LT |
635 | return sock->ops->sendmsg(iocb, sock, msg, size); |
636 | } | |
637 | ||
228e548e AB |
638 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
639 | struct msghdr *msg, size_t size) | |
640 | { | |
641 | int err = security_socket_sendmsg(sock, msg, size); | |
642 | ||
643 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
644 | } | |
645 | ||
1da177e4 LT |
646 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
647 | { | |
648 | struct kiocb iocb; | |
649 | struct sock_iocb siocb; | |
650 | int ret; | |
651 | ||
652 | init_sync_kiocb(&iocb, NULL); | |
653 | iocb.private = &siocb; | |
654 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
655 | if (-EIOCBQUEUED == ret) | |
656 | ret = wait_on_sync_kiocb(&iocb); | |
657 | return ret; | |
658 | } | |
c6d409cf | 659 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 660 | |
894dc24c | 661 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
662 | { |
663 | struct kiocb iocb; | |
664 | struct sock_iocb siocb; | |
665 | int ret; | |
666 | ||
667 | init_sync_kiocb(&iocb, NULL); | |
668 | iocb.private = &siocb; | |
669 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
670 | if (-EIOCBQUEUED == ret) | |
671 | ret = wait_on_sync_kiocb(&iocb); | |
672 | return ret; | |
673 | } | |
674 | ||
1da177e4 LT |
675 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
676 | struct kvec *vec, size_t num, size_t size) | |
677 | { | |
678 | mm_segment_t oldfs = get_fs(); | |
679 | int result; | |
680 | ||
681 | set_fs(KERNEL_DS); | |
682 | /* | |
683 | * the following is safe, since for compiler definitions of kvec and | |
684 | * iovec are identical, yielding the same in-core layout and alignment | |
685 | */ | |
89bddce5 | 686 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
687 | msg->msg_iovlen = num; |
688 | result = sock_sendmsg(sock, msg, size); | |
689 | set_fs(oldfs); | |
690 | return result; | |
691 | } | |
c6d409cf | 692 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 693 | |
20d49473 PO |
694 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
695 | { | |
696 | if (kt.tv64) { | |
697 | *ts = ktime_to_timespec(kt); | |
698 | return 1; | |
699 | } else { | |
700 | return 0; | |
701 | } | |
702 | } | |
703 | ||
92f37fd2 ED |
704 | /* |
705 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
706 | */ | |
707 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
708 | struct sk_buff *skb) | |
709 | { | |
20d49473 PO |
710 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
711 | struct timespec ts[3]; | |
712 | int empty = 1; | |
713 | struct skb_shared_hwtstamps *shhwtstamps = | |
714 | skb_hwtstamps(skb); | |
715 | ||
716 | /* Race occurred between timestamp enabling and packet | |
717 | receiving. Fill in the current time for now. */ | |
718 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
719 | __net_timestamp(skb); | |
720 | ||
721 | if (need_software_tstamp) { | |
722 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
723 | struct timeval tv; | |
724 | skb_get_timestamp(skb, &tv); | |
725 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
726 | sizeof(tv), &tv); | |
727 | } else { | |
842509b8 | 728 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 729 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 730 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
731 | } |
732 | } | |
733 | ||
734 | ||
735 | memset(ts, 0, sizeof(ts)); | |
736 | if (skb->tstamp.tv64 && | |
737 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
738 | skb_get_timestampns(skb, ts + 0); | |
739 | empty = 0; | |
740 | } | |
741 | if (shhwtstamps) { | |
742 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
743 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
744 | empty = 0; | |
745 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
746 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
747 | empty = 0; | |
92f37fd2 | 748 | } |
20d49473 PO |
749 | if (!empty) |
750 | put_cmsg(msg, SOL_SOCKET, | |
751 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 752 | } |
7c81fd8b ACM |
753 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
754 | ||
6e3e939f JB |
755 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
756 | struct sk_buff *skb) | |
757 | { | |
758 | int ack; | |
759 | ||
760 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
761 | return; | |
762 | if (!skb->wifi_acked_valid) | |
763 | return; | |
764 | ||
765 | ack = skb->wifi_acked; | |
766 | ||
767 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
768 | } | |
769 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
770 | ||
11165f14 | 771 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
772 | struct sk_buff *skb) | |
3b885787 NH |
773 | { |
774 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
775 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
776 | sizeof(__u32), &skb->dropcount); | |
777 | } | |
778 | ||
767dd033 | 779 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
780 | struct sk_buff *skb) |
781 | { | |
782 | sock_recv_timestamp(msg, sk, skb); | |
783 | sock_recv_drops(msg, sk, skb); | |
784 | } | |
767dd033 | 785 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 786 | |
a2e27255 ACM |
787 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
788 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 789 | { |
1da177e4 LT |
790 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
791 | ||
f8451725 HX |
792 | sock_update_classid(sock->sk); |
793 | ||
1da177e4 LT |
794 | si->sock = sock; |
795 | si->scm = NULL; | |
796 | si->msg = msg; | |
797 | si->size = size; | |
798 | si->flags = flags; | |
799 | ||
1da177e4 LT |
800 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
801 | } | |
802 | ||
a2e27255 ACM |
803 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
804 | struct msghdr *msg, size_t size, int flags) | |
805 | { | |
806 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
807 | ||
808 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
809 | } | |
810 | ||
89bddce5 | 811 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
812 | size_t size, int flags) |
813 | { | |
814 | struct kiocb iocb; | |
815 | struct sock_iocb siocb; | |
816 | int ret; | |
817 | ||
89bddce5 | 818 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
819 | iocb.private = &siocb; |
820 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
821 | if (-EIOCBQUEUED == ret) | |
822 | ret = wait_on_sync_kiocb(&iocb); | |
823 | return ret; | |
824 | } | |
c6d409cf | 825 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 826 | |
a2e27255 ACM |
827 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
828 | size_t size, int flags) | |
829 | { | |
830 | struct kiocb iocb; | |
831 | struct sock_iocb siocb; | |
832 | int ret; | |
833 | ||
834 | init_sync_kiocb(&iocb, NULL); | |
835 | iocb.private = &siocb; | |
836 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
837 | if (-EIOCBQUEUED == ret) | |
838 | ret = wait_on_sync_kiocb(&iocb); | |
839 | return ret; | |
840 | } | |
841 | ||
c1249c0a ML |
842 | /** |
843 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
844 | * @sock: The socket to receive the message from | |
845 | * @msg: Received message | |
846 | * @vec: Input s/g array for message data | |
847 | * @num: Size of input s/g array | |
848 | * @size: Number of bytes to read | |
849 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
850 | * | |
851 | * On return the msg structure contains the scatter/gather array passed in the | |
852 | * vec argument. The array is modified so that it consists of the unfilled | |
853 | * portion of the original array. | |
854 | * | |
855 | * The returned value is the total number of bytes received, or an error. | |
856 | */ | |
89bddce5 SH |
857 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
858 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
859 | { |
860 | mm_segment_t oldfs = get_fs(); | |
861 | int result; | |
862 | ||
863 | set_fs(KERNEL_DS); | |
864 | /* | |
865 | * the following is safe, since for compiler definitions of kvec and | |
866 | * iovec are identical, yielding the same in-core layout and alignment | |
867 | */ | |
89bddce5 | 868 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
869 | result = sock_recvmsg(sock, msg, size, flags); |
870 | set_fs(oldfs); | |
871 | return result; | |
872 | } | |
c6d409cf | 873 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 LT |
874 | |
875 | static void sock_aio_dtor(struct kiocb *iocb) | |
876 | { | |
877 | kfree(iocb->private); | |
878 | } | |
879 | ||
ce1d4d3e CH |
880 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
881 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 882 | { |
1da177e4 LT |
883 | struct socket *sock; |
884 | int flags; | |
885 | ||
ce1d4d3e CH |
886 | sock = file->private_data; |
887 | ||
35f9c09f ED |
888 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
889 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
890 | flags |= more; | |
ce1d4d3e | 891 | |
e6949583 | 892 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 893 | } |
1da177e4 | 894 | |
9c55e01c | 895 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 896 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
897 | unsigned int flags) |
898 | { | |
899 | struct socket *sock = file->private_data; | |
900 | ||
997b37da RDC |
901 | if (unlikely(!sock->ops->splice_read)) |
902 | return -EINVAL; | |
903 | ||
f8451725 HX |
904 | sock_update_classid(sock->sk); |
905 | ||
9c55e01c JA |
906 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
907 | } | |
908 | ||
ce1d4d3e | 909 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 910 | struct sock_iocb *siocb) |
ce1d4d3e CH |
911 | { |
912 | if (!is_sync_kiocb(iocb)) { | |
913 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
914 | if (!siocb) | |
915 | return NULL; | |
1da177e4 LT |
916 | iocb->ki_dtor = sock_aio_dtor; |
917 | } | |
1da177e4 | 918 | |
ce1d4d3e | 919 | siocb->kiocb = iocb; |
ce1d4d3e CH |
920 | iocb->private = siocb; |
921 | return siocb; | |
1da177e4 LT |
922 | } |
923 | ||
ce1d4d3e | 924 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
925 | struct file *file, const struct iovec *iov, |
926 | unsigned long nr_segs) | |
ce1d4d3e CH |
927 | { |
928 | struct socket *sock = file->private_data; | |
929 | size_t size = 0; | |
930 | int i; | |
1da177e4 | 931 | |
89bddce5 SH |
932 | for (i = 0; i < nr_segs; i++) |
933 | size += iov[i].iov_len; | |
1da177e4 | 934 | |
ce1d4d3e CH |
935 | msg->msg_name = NULL; |
936 | msg->msg_namelen = 0; | |
937 | msg->msg_control = NULL; | |
938 | msg->msg_controllen = 0; | |
89bddce5 | 939 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
940 | msg->msg_iovlen = nr_segs; |
941 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
942 | ||
943 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
944 | } | |
945 | ||
027445c3 BP |
946 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
947 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
948 | { |
949 | struct sock_iocb siocb, *x; | |
950 | ||
1da177e4 LT |
951 | if (pos != 0) |
952 | return -ESPIPE; | |
027445c3 BP |
953 | |
954 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
955 | return 0; |
956 | ||
027445c3 BP |
957 | |
958 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
959 | if (!x) |
960 | return -ENOMEM; | |
027445c3 | 961 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
962 | } |
963 | ||
ce1d4d3e | 964 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
965 | struct file *file, const struct iovec *iov, |
966 | unsigned long nr_segs) | |
1da177e4 | 967 | { |
ce1d4d3e CH |
968 | struct socket *sock = file->private_data; |
969 | size_t size = 0; | |
970 | int i; | |
1da177e4 | 971 | |
89bddce5 SH |
972 | for (i = 0; i < nr_segs; i++) |
973 | size += iov[i].iov_len; | |
1da177e4 | 974 | |
ce1d4d3e CH |
975 | msg->msg_name = NULL; |
976 | msg->msg_namelen = 0; | |
977 | msg->msg_control = NULL; | |
978 | msg->msg_controllen = 0; | |
89bddce5 | 979 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
980 | msg->msg_iovlen = nr_segs; |
981 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
982 | if (sock->type == SOCK_SEQPACKET) | |
983 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 984 | |
ce1d4d3e | 985 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
986 | } |
987 | ||
027445c3 BP |
988 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
989 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
990 | { |
991 | struct sock_iocb siocb, *x; | |
1da177e4 | 992 | |
ce1d4d3e CH |
993 | if (pos != 0) |
994 | return -ESPIPE; | |
027445c3 | 995 | |
027445c3 | 996 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
997 | if (!x) |
998 | return -ENOMEM; | |
1da177e4 | 999 | |
027445c3 | 1000 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
1001 | } |
1002 | ||
1da177e4 LT |
1003 | /* |
1004 | * Atomic setting of ioctl hooks to avoid race | |
1005 | * with module unload. | |
1006 | */ | |
1007 | ||
4a3e2f71 | 1008 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 1009 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 1010 | |
881d966b | 1011 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 1012 | { |
4a3e2f71 | 1013 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 1014 | br_ioctl_hook = hook; |
4a3e2f71 | 1015 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1016 | } |
1017 | EXPORT_SYMBOL(brioctl_set); | |
1018 | ||
4a3e2f71 | 1019 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 1020 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 1021 | |
881d966b | 1022 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 1023 | { |
4a3e2f71 | 1024 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1025 | vlan_ioctl_hook = hook; |
4a3e2f71 | 1026 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
1027 | } |
1028 | EXPORT_SYMBOL(vlan_ioctl_set); | |
1029 | ||
4a3e2f71 | 1030 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 1031 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 1032 | |
89bddce5 | 1033 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 1034 | { |
4a3e2f71 | 1035 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 1036 | dlci_ioctl_hook = hook; |
4a3e2f71 | 1037 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1038 | } |
1039 | EXPORT_SYMBOL(dlci_ioctl_set); | |
1040 | ||
6b96018b AB |
1041 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
1042 | unsigned int cmd, unsigned long arg) | |
1043 | { | |
1044 | int err; | |
1045 | void __user *argp = (void __user *)arg; | |
1046 | ||
1047 | err = sock->ops->ioctl(sock, cmd, arg); | |
1048 | ||
1049 | /* | |
1050 | * If this ioctl is unknown try to hand it down | |
1051 | * to the NIC driver. | |
1052 | */ | |
1053 | if (err == -ENOIOCTLCMD) | |
1054 | err = dev_ioctl(net, cmd, argp); | |
1055 | ||
1056 | return err; | |
1057 | } | |
1058 | ||
1da177e4 LT |
1059 | /* |
1060 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1061 | * what to do with it - that's up to the protocol still. | |
1062 | */ | |
1063 | ||
1064 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1065 | { | |
1066 | struct socket *sock; | |
881d966b | 1067 | struct sock *sk; |
1da177e4 LT |
1068 | void __user *argp = (void __user *)arg; |
1069 | int pid, err; | |
881d966b | 1070 | struct net *net; |
1da177e4 | 1071 | |
b69aee04 | 1072 | sock = file->private_data; |
881d966b | 1073 | sk = sock->sk; |
3b1e0a65 | 1074 | net = sock_net(sk); |
1da177e4 | 1075 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1076 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1077 | } else |
3d23e349 | 1078 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1079 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1080 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1081 | } else |
3d23e349 | 1082 | #endif |
89bddce5 | 1083 | switch (cmd) { |
1da177e4 LT |
1084 | case FIOSETOWN: |
1085 | case SIOCSPGRP: | |
1086 | err = -EFAULT; | |
1087 | if (get_user(pid, (int __user *)argp)) | |
1088 | break; | |
1089 | err = f_setown(sock->file, pid, 1); | |
1090 | break; | |
1091 | case FIOGETOWN: | |
1092 | case SIOCGPGRP: | |
609d7fa9 | 1093 | err = put_user(f_getown(sock->file), |
89bddce5 | 1094 | (int __user *)argp); |
1da177e4 LT |
1095 | break; |
1096 | case SIOCGIFBR: | |
1097 | case SIOCSIFBR: | |
1098 | case SIOCBRADDBR: | |
1099 | case SIOCBRDELBR: | |
1100 | err = -ENOPKG; | |
1101 | if (!br_ioctl_hook) | |
1102 | request_module("bridge"); | |
1103 | ||
4a3e2f71 | 1104 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1105 | if (br_ioctl_hook) |
881d966b | 1106 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1107 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1108 | break; |
1109 | case SIOCGIFVLAN: | |
1110 | case SIOCSIFVLAN: | |
1111 | err = -ENOPKG; | |
1112 | if (!vlan_ioctl_hook) | |
1113 | request_module("8021q"); | |
1114 | ||
4a3e2f71 | 1115 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1116 | if (vlan_ioctl_hook) |
881d966b | 1117 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1118 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1119 | break; |
1da177e4 LT |
1120 | case SIOCADDDLCI: |
1121 | case SIOCDELDLCI: | |
1122 | err = -ENOPKG; | |
1123 | if (!dlci_ioctl_hook) | |
1124 | request_module("dlci"); | |
1125 | ||
7512cbf6 PE |
1126 | mutex_lock(&dlci_ioctl_mutex); |
1127 | if (dlci_ioctl_hook) | |
1da177e4 | 1128 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1129 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1130 | break; |
1131 | default: | |
6b96018b | 1132 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1133 | break; |
89bddce5 | 1134 | } |
1da177e4 LT |
1135 | return err; |
1136 | } | |
1137 | ||
1138 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1139 | { | |
1140 | int err; | |
1141 | struct socket *sock = NULL; | |
89bddce5 | 1142 | |
1da177e4 LT |
1143 | err = security_socket_create(family, type, protocol, 1); |
1144 | if (err) | |
1145 | goto out; | |
1146 | ||
1147 | sock = sock_alloc(); | |
1148 | if (!sock) { | |
1149 | err = -ENOMEM; | |
1150 | goto out; | |
1151 | } | |
1152 | ||
1da177e4 | 1153 | sock->type = type; |
7420ed23 VY |
1154 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1155 | if (err) | |
1156 | goto out_release; | |
1157 | ||
1da177e4 LT |
1158 | out: |
1159 | *res = sock; | |
1160 | return err; | |
7420ed23 VY |
1161 | out_release: |
1162 | sock_release(sock); | |
1163 | sock = NULL; | |
1164 | goto out; | |
1da177e4 | 1165 | } |
c6d409cf | 1166 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1167 | |
1168 | /* No kernel lock held - perfect */ | |
89bddce5 | 1169 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1170 | { |
1171 | struct socket *sock; | |
1172 | ||
1173 | /* | |
89bddce5 | 1174 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1175 | */ |
b69aee04 | 1176 | sock = file->private_data; |
1da177e4 LT |
1177 | return sock->ops->poll(file, sock, wait); |
1178 | } | |
1179 | ||
89bddce5 | 1180 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1181 | { |
b69aee04 | 1182 | struct socket *sock = file->private_data; |
1da177e4 LT |
1183 | |
1184 | return sock->ops->mmap(file, sock, vma); | |
1185 | } | |
1186 | ||
20380731 | 1187 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1188 | { |
1189 | /* | |
89bddce5 SH |
1190 | * It was possible the inode is NULL we were |
1191 | * closing an unfinished socket. | |
1da177e4 LT |
1192 | */ |
1193 | ||
89bddce5 | 1194 | if (!inode) { |
1da177e4 LT |
1195 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1196 | return 0; | |
1197 | } | |
1da177e4 LT |
1198 | sock_release(SOCKET_I(inode)); |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * Update the socket async list | |
1204 | * | |
1205 | * Fasync_list locking strategy. | |
1206 | * | |
1207 | * 1. fasync_list is modified only under process context socket lock | |
1208 | * i.e. under semaphore. | |
1209 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1210 | * or under socket lock |
1da177e4 LT |
1211 | */ |
1212 | ||
1213 | static int sock_fasync(int fd, struct file *filp, int on) | |
1214 | { | |
989a2979 ED |
1215 | struct socket *sock = filp->private_data; |
1216 | struct sock *sk = sock->sk; | |
eaefd110 | 1217 | struct socket_wq *wq; |
1da177e4 | 1218 | |
989a2979 | 1219 | if (sk == NULL) |
1da177e4 | 1220 | return -EINVAL; |
1da177e4 LT |
1221 | |
1222 | lock_sock(sk); | |
eaefd110 ED |
1223 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1224 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1225 | |
eaefd110 | 1226 | if (!wq->fasync_list) |
989a2979 ED |
1227 | sock_reset_flag(sk, SOCK_FASYNC); |
1228 | else | |
bcdce719 | 1229 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1230 | |
989a2979 | 1231 | release_sock(sk); |
1da177e4 LT |
1232 | return 0; |
1233 | } | |
1234 | ||
43815482 | 1235 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1236 | |
1237 | int sock_wake_async(struct socket *sock, int how, int band) | |
1238 | { | |
43815482 ED |
1239 | struct socket_wq *wq; |
1240 | ||
1241 | if (!sock) | |
1242 | return -1; | |
1243 | rcu_read_lock(); | |
1244 | wq = rcu_dereference(sock->wq); | |
1245 | if (!wq || !wq->fasync_list) { | |
1246 | rcu_read_unlock(); | |
1da177e4 | 1247 | return -1; |
43815482 | 1248 | } |
89bddce5 | 1249 | switch (how) { |
8d8ad9d7 | 1250 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1251 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1252 | break; | |
1253 | goto call_kill; | |
8d8ad9d7 | 1254 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1255 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1256 | break; | |
1257 | /* fall through */ | |
8d8ad9d7 | 1258 | case SOCK_WAKE_IO: |
89bddce5 | 1259 | call_kill: |
43815482 | 1260 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1261 | break; |
8d8ad9d7 | 1262 | case SOCK_WAKE_URG: |
43815482 | 1263 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1264 | } |
43815482 | 1265 | rcu_read_unlock(); |
1da177e4 LT |
1266 | return 0; |
1267 | } | |
c6d409cf | 1268 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1269 | |
721db93a | 1270 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1271 | struct socket **res, int kern) |
1da177e4 LT |
1272 | { |
1273 | int err; | |
1274 | struct socket *sock; | |
55737fda | 1275 | const struct net_proto_family *pf; |
1da177e4 LT |
1276 | |
1277 | /* | |
89bddce5 | 1278 | * Check protocol is in range |
1da177e4 LT |
1279 | */ |
1280 | if (family < 0 || family >= NPROTO) | |
1281 | return -EAFNOSUPPORT; | |
1282 | if (type < 0 || type >= SOCK_MAX) | |
1283 | return -EINVAL; | |
1284 | ||
1285 | /* Compatibility. | |
1286 | ||
1287 | This uglymoron is moved from INET layer to here to avoid | |
1288 | deadlock in module load. | |
1289 | */ | |
1290 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1291 | static int warned; |
1da177e4 LT |
1292 | if (!warned) { |
1293 | warned = 1; | |
89bddce5 SH |
1294 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1295 | current->comm); | |
1da177e4 LT |
1296 | } |
1297 | family = PF_PACKET; | |
1298 | } | |
1299 | ||
1300 | err = security_socket_create(family, type, protocol, kern); | |
1301 | if (err) | |
1302 | return err; | |
89bddce5 | 1303 | |
55737fda SH |
1304 | /* |
1305 | * Allocate the socket and allow the family to set things up. if | |
1306 | * the protocol is 0, the family is instructed to select an appropriate | |
1307 | * default. | |
1308 | */ | |
1309 | sock = sock_alloc(); | |
1310 | if (!sock) { | |
e87cc472 | 1311 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1312 | return -ENFILE; /* Not exactly a match, but its the |
1313 | closest posix thing */ | |
1314 | } | |
1315 | ||
1316 | sock->type = type; | |
1317 | ||
95a5afca | 1318 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1319 | /* Attempt to load a protocol module if the find failed. |
1320 | * | |
1321 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1322 | * requested real, full-featured networking support upon configuration. |
1323 | * Otherwise module support will break! | |
1324 | */ | |
190683a9 | 1325 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1326 | request_module("net-pf-%d", family); |
1da177e4 LT |
1327 | #endif |
1328 | ||
55737fda SH |
1329 | rcu_read_lock(); |
1330 | pf = rcu_dereference(net_families[family]); | |
1331 | err = -EAFNOSUPPORT; | |
1332 | if (!pf) | |
1333 | goto out_release; | |
1da177e4 LT |
1334 | |
1335 | /* | |
1336 | * We will call the ->create function, that possibly is in a loadable | |
1337 | * module, so we have to bump that loadable module refcnt first. | |
1338 | */ | |
55737fda | 1339 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1340 | goto out_release; |
1341 | ||
55737fda SH |
1342 | /* Now protected by module ref count */ |
1343 | rcu_read_unlock(); | |
1344 | ||
3f378b68 | 1345 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1346 | if (err < 0) |
1da177e4 | 1347 | goto out_module_put; |
a79af59e | 1348 | |
1da177e4 LT |
1349 | /* |
1350 | * Now to bump the refcnt of the [loadable] module that owns this | |
1351 | * socket at sock_release time we decrement its refcnt. | |
1352 | */ | |
55737fda SH |
1353 | if (!try_module_get(sock->ops->owner)) |
1354 | goto out_module_busy; | |
1355 | ||
1da177e4 LT |
1356 | /* |
1357 | * Now that we're done with the ->create function, the [loadable] | |
1358 | * module can have its refcnt decremented | |
1359 | */ | |
55737fda | 1360 | module_put(pf->owner); |
7420ed23 VY |
1361 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1362 | if (err) | |
3b185525 | 1363 | goto out_sock_release; |
55737fda | 1364 | *res = sock; |
1da177e4 | 1365 | |
55737fda SH |
1366 | return 0; |
1367 | ||
1368 | out_module_busy: | |
1369 | err = -EAFNOSUPPORT; | |
1da177e4 | 1370 | out_module_put: |
55737fda SH |
1371 | sock->ops = NULL; |
1372 | module_put(pf->owner); | |
1373 | out_sock_release: | |
1da177e4 | 1374 | sock_release(sock); |
55737fda SH |
1375 | return err; |
1376 | ||
1377 | out_release: | |
1378 | rcu_read_unlock(); | |
1379 | goto out_sock_release; | |
1da177e4 | 1380 | } |
721db93a | 1381 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1382 | |
1383 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1384 | { | |
1b8d7ae4 | 1385 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1386 | } |
c6d409cf | 1387 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1388 | |
1389 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1390 | { | |
1b8d7ae4 | 1391 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1392 | } |
c6d409cf | 1393 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1394 | |
3e0fa65f | 1395 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1396 | { |
1397 | int retval; | |
1398 | struct socket *sock; | |
a677a039 UD |
1399 | int flags; |
1400 | ||
e38b36f3 UD |
1401 | /* Check the SOCK_* constants for consistency. */ |
1402 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1403 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1404 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1405 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1406 | ||
a677a039 | 1407 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1408 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1409 | return -EINVAL; |
1410 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1411 | |
aaca0bdc UD |
1412 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1413 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1414 | ||
1da177e4 LT |
1415 | retval = sock_create(family, type, protocol, &sock); |
1416 | if (retval < 0) | |
1417 | goto out; | |
1418 | ||
77d27200 | 1419 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1420 | if (retval < 0) |
1421 | goto out_release; | |
1422 | ||
1423 | out: | |
1424 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1425 | return retval; | |
1426 | ||
1427 | out_release: | |
1428 | sock_release(sock); | |
1429 | return retval; | |
1430 | } | |
1431 | ||
1432 | /* | |
1433 | * Create a pair of connected sockets. | |
1434 | */ | |
1435 | ||
3e0fa65f HC |
1436 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1437 | int __user *, usockvec) | |
1da177e4 LT |
1438 | { |
1439 | struct socket *sock1, *sock2; | |
1440 | int fd1, fd2, err; | |
db349509 | 1441 | struct file *newfile1, *newfile2; |
a677a039 UD |
1442 | int flags; |
1443 | ||
1444 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1445 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1446 | return -EINVAL; |
1447 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1448 | |
aaca0bdc UD |
1449 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1450 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1451 | ||
1da177e4 LT |
1452 | /* |
1453 | * Obtain the first socket and check if the underlying protocol | |
1454 | * supports the socketpair call. | |
1455 | */ | |
1456 | ||
1457 | err = sock_create(family, type, protocol, &sock1); | |
1458 | if (err < 0) | |
1459 | goto out; | |
1460 | ||
1461 | err = sock_create(family, type, protocol, &sock2); | |
1462 | if (err < 0) | |
1463 | goto out_release_1; | |
1464 | ||
1465 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1466 | if (err < 0) |
1da177e4 LT |
1467 | goto out_release_both; |
1468 | ||
600e1779 | 1469 | fd1 = sock_alloc_file(sock1, &newfile1, flags, NULL); |
bf3c23d1 DM |
1470 | if (unlikely(fd1 < 0)) { |
1471 | err = fd1; | |
db349509 | 1472 | goto out_release_both; |
bf3c23d1 | 1473 | } |
1da177e4 | 1474 | |
600e1779 | 1475 | fd2 = sock_alloc_file(sock2, &newfile2, flags, NULL); |
198de4d7 AV |
1476 | if (unlikely(fd2 < 0)) { |
1477 | err = fd2; | |
1478 | fput(newfile1); | |
1479 | put_unused_fd(fd1); | |
1480 | sock_release(sock2); | |
1481 | goto out; | |
db349509 AV |
1482 | } |
1483 | ||
157cf649 | 1484 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1485 | fd_install(fd1, newfile1); |
1486 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1487 | /* fd1 and fd2 may be already another descriptors. |
1488 | * Not kernel problem. | |
1489 | */ | |
1490 | ||
89bddce5 | 1491 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1492 | if (!err) |
1493 | err = put_user(fd2, &usockvec[1]); | |
1494 | if (!err) | |
1495 | return 0; | |
1496 | ||
1497 | sys_close(fd2); | |
1498 | sys_close(fd1); | |
1499 | return err; | |
1500 | ||
1da177e4 | 1501 | out_release_both: |
89bddce5 | 1502 | sock_release(sock2); |
1da177e4 | 1503 | out_release_1: |
89bddce5 | 1504 | sock_release(sock1); |
1da177e4 LT |
1505 | out: |
1506 | return err; | |
1507 | } | |
1508 | ||
1da177e4 LT |
1509 | /* |
1510 | * Bind a name to a socket. Nothing much to do here since it's | |
1511 | * the protocol's responsibility to handle the local address. | |
1512 | * | |
1513 | * We move the socket address to kernel space before we call | |
1514 | * the protocol layer (having also checked the address is ok). | |
1515 | */ | |
1516 | ||
20f37034 | 1517 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1518 | { |
1519 | struct socket *sock; | |
230b1839 | 1520 | struct sockaddr_storage address; |
6cb153ca | 1521 | int err, fput_needed; |
1da177e4 | 1522 | |
89bddce5 | 1523 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1524 | if (sock) { |
43db362d | 1525 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1526 | if (err >= 0) { |
1527 | err = security_socket_bind(sock, | |
230b1839 | 1528 | (struct sockaddr *)&address, |
89bddce5 | 1529 | addrlen); |
6cb153ca BL |
1530 | if (!err) |
1531 | err = sock->ops->bind(sock, | |
89bddce5 | 1532 | (struct sockaddr *) |
230b1839 | 1533 | &address, addrlen); |
1da177e4 | 1534 | } |
6cb153ca | 1535 | fput_light(sock->file, fput_needed); |
89bddce5 | 1536 | } |
1da177e4 LT |
1537 | return err; |
1538 | } | |
1539 | ||
1da177e4 LT |
1540 | /* |
1541 | * Perform a listen. Basically, we allow the protocol to do anything | |
1542 | * necessary for a listen, and if that works, we mark the socket as | |
1543 | * ready for listening. | |
1544 | */ | |
1545 | ||
3e0fa65f | 1546 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1547 | { |
1548 | struct socket *sock; | |
6cb153ca | 1549 | int err, fput_needed; |
b8e1f9b5 | 1550 | int somaxconn; |
89bddce5 SH |
1551 | |
1552 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1553 | if (sock) { | |
8efa6e93 | 1554 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1555 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1556 | backlog = somaxconn; |
1da177e4 LT |
1557 | |
1558 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1559 | if (!err) |
1560 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1561 | |
6cb153ca | 1562 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1563 | } |
1564 | return err; | |
1565 | } | |
1566 | ||
1da177e4 LT |
1567 | /* |
1568 | * For accept, we attempt to create a new socket, set up the link | |
1569 | * with the client, wake up the client, then return the new | |
1570 | * connected fd. We collect the address of the connector in kernel | |
1571 | * space and move it to user at the very end. This is unclean because | |
1572 | * we open the socket then return an error. | |
1573 | * | |
1574 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1575 | * status to recvmsg. We need to add that support in a way thats | |
1576 | * clean when we restucture accept also. | |
1577 | */ | |
1578 | ||
20f37034 HC |
1579 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1580 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1581 | { |
1582 | struct socket *sock, *newsock; | |
39d8c1b6 | 1583 | struct file *newfile; |
6cb153ca | 1584 | int err, len, newfd, fput_needed; |
230b1839 | 1585 | struct sockaddr_storage address; |
1da177e4 | 1586 | |
77d27200 | 1587 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1588 | return -EINVAL; |
1589 | ||
1590 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1591 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1592 | ||
6cb153ca | 1593 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1594 | if (!sock) |
1595 | goto out; | |
1596 | ||
1597 | err = -ENFILE; | |
c6d409cf ED |
1598 | newsock = sock_alloc(); |
1599 | if (!newsock) | |
1da177e4 LT |
1600 | goto out_put; |
1601 | ||
1602 | newsock->type = sock->type; | |
1603 | newsock->ops = sock->ops; | |
1604 | ||
1da177e4 LT |
1605 | /* |
1606 | * We don't need try_module_get here, as the listening socket (sock) | |
1607 | * has the protocol module (sock->ops->owner) held. | |
1608 | */ | |
1609 | __module_get(newsock->ops->owner); | |
1610 | ||
600e1779 MY |
1611 | newfd = sock_alloc_file(newsock, &newfile, flags, |
1612 | sock->sk->sk_prot_creator->name); | |
39d8c1b6 DM |
1613 | if (unlikely(newfd < 0)) { |
1614 | err = newfd; | |
9a1875e6 DM |
1615 | sock_release(newsock); |
1616 | goto out_put; | |
39d8c1b6 DM |
1617 | } |
1618 | ||
a79af59e FF |
1619 | err = security_socket_accept(sock, newsock); |
1620 | if (err) | |
39d8c1b6 | 1621 | goto out_fd; |
a79af59e | 1622 | |
1da177e4 LT |
1623 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1624 | if (err < 0) | |
39d8c1b6 | 1625 | goto out_fd; |
1da177e4 LT |
1626 | |
1627 | if (upeer_sockaddr) { | |
230b1839 | 1628 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1629 | &len, 2) < 0) { |
1da177e4 | 1630 | err = -ECONNABORTED; |
39d8c1b6 | 1631 | goto out_fd; |
1da177e4 | 1632 | } |
43db362d | 1633 | err = move_addr_to_user(&address, |
230b1839 | 1634 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1635 | if (err < 0) |
39d8c1b6 | 1636 | goto out_fd; |
1da177e4 LT |
1637 | } |
1638 | ||
1639 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1640 | ||
39d8c1b6 DM |
1641 | fd_install(newfd, newfile); |
1642 | err = newfd; | |
1da177e4 | 1643 | |
1da177e4 | 1644 | out_put: |
6cb153ca | 1645 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1646 | out: |
1647 | return err; | |
39d8c1b6 | 1648 | out_fd: |
9606a216 | 1649 | fput(newfile); |
39d8c1b6 | 1650 | put_unused_fd(newfd); |
1da177e4 LT |
1651 | goto out_put; |
1652 | } | |
1653 | ||
20f37034 HC |
1654 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1655 | int __user *, upeer_addrlen) | |
aaca0bdc | 1656 | { |
de11defe | 1657 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1658 | } |
1659 | ||
1da177e4 LT |
1660 | /* |
1661 | * Attempt to connect to a socket with the server address. The address | |
1662 | * is in user space so we verify it is OK and move it to kernel space. | |
1663 | * | |
1664 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1665 | * break bindings | |
1666 | * | |
1667 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1668 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1669 | * include the -EINPROGRESS status for such sockets. | |
1670 | */ | |
1671 | ||
20f37034 HC |
1672 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1673 | int, addrlen) | |
1da177e4 LT |
1674 | { |
1675 | struct socket *sock; | |
230b1839 | 1676 | struct sockaddr_storage address; |
6cb153ca | 1677 | int err, fput_needed; |
1da177e4 | 1678 | |
6cb153ca | 1679 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1680 | if (!sock) |
1681 | goto out; | |
43db362d | 1682 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1683 | if (err < 0) |
1684 | goto out_put; | |
1685 | ||
89bddce5 | 1686 | err = |
230b1839 | 1687 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1688 | if (err) |
1689 | goto out_put; | |
1690 | ||
230b1839 | 1691 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1692 | sock->file->f_flags); |
1693 | out_put: | |
6cb153ca | 1694 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1695 | out: |
1696 | return err; | |
1697 | } | |
1698 | ||
1699 | /* | |
1700 | * Get the local address ('name') of a socket object. Move the obtained | |
1701 | * name to user space. | |
1702 | */ | |
1703 | ||
20f37034 HC |
1704 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1705 | int __user *, usockaddr_len) | |
1da177e4 LT |
1706 | { |
1707 | struct socket *sock; | |
230b1839 | 1708 | struct sockaddr_storage address; |
6cb153ca | 1709 | int len, err, fput_needed; |
89bddce5 | 1710 | |
6cb153ca | 1711 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1712 | if (!sock) |
1713 | goto out; | |
1714 | ||
1715 | err = security_socket_getsockname(sock); | |
1716 | if (err) | |
1717 | goto out_put; | |
1718 | ||
230b1839 | 1719 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1720 | if (err) |
1721 | goto out_put; | |
43db362d | 1722 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1723 | |
1724 | out_put: | |
6cb153ca | 1725 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1726 | out: |
1727 | return err; | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * Get the remote address ('name') of a socket object. Move the obtained | |
1732 | * name to user space. | |
1733 | */ | |
1734 | ||
20f37034 HC |
1735 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1736 | int __user *, usockaddr_len) | |
1da177e4 LT |
1737 | { |
1738 | struct socket *sock; | |
230b1839 | 1739 | struct sockaddr_storage address; |
6cb153ca | 1740 | int len, err, fput_needed; |
1da177e4 | 1741 | |
89bddce5 SH |
1742 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1743 | if (sock != NULL) { | |
1da177e4 LT |
1744 | err = security_socket_getpeername(sock); |
1745 | if (err) { | |
6cb153ca | 1746 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1747 | return err; |
1748 | } | |
1749 | ||
89bddce5 | 1750 | err = |
230b1839 | 1751 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1752 | 1); |
1da177e4 | 1753 | if (!err) |
43db362d | 1754 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1755 | usockaddr_len); |
6cb153ca | 1756 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1757 | } |
1758 | return err; | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * Send a datagram to a given address. We move the address into kernel | |
1763 | * space and check the user space data area is readable before invoking | |
1764 | * the protocol. | |
1765 | */ | |
1766 | ||
3e0fa65f | 1767 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1768 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1769 | int, addr_len) |
1da177e4 LT |
1770 | { |
1771 | struct socket *sock; | |
230b1839 | 1772 | struct sockaddr_storage address; |
1da177e4 LT |
1773 | int err; |
1774 | struct msghdr msg; | |
1775 | struct iovec iov; | |
6cb153ca | 1776 | int fput_needed; |
6cb153ca | 1777 | |
253eacc0 LT |
1778 | if (len > INT_MAX) |
1779 | len = INT_MAX; | |
de0fa95c PE |
1780 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1781 | if (!sock) | |
4387ff75 | 1782 | goto out; |
6cb153ca | 1783 | |
89bddce5 SH |
1784 | iov.iov_base = buff; |
1785 | iov.iov_len = len; | |
1786 | msg.msg_name = NULL; | |
1787 | msg.msg_iov = &iov; | |
1788 | msg.msg_iovlen = 1; | |
1789 | msg.msg_control = NULL; | |
1790 | msg.msg_controllen = 0; | |
1791 | msg.msg_namelen = 0; | |
6cb153ca | 1792 | if (addr) { |
43db362d | 1793 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1794 | if (err < 0) |
1795 | goto out_put; | |
230b1839 | 1796 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1797 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1798 | } |
1799 | if (sock->file->f_flags & O_NONBLOCK) | |
1800 | flags |= MSG_DONTWAIT; | |
1801 | msg.msg_flags = flags; | |
1802 | err = sock_sendmsg(sock, &msg, len); | |
1803 | ||
89bddce5 | 1804 | out_put: |
de0fa95c | 1805 | fput_light(sock->file, fput_needed); |
4387ff75 | 1806 | out: |
1da177e4 LT |
1807 | return err; |
1808 | } | |
1809 | ||
1810 | /* | |
89bddce5 | 1811 | * Send a datagram down a socket. |
1da177e4 LT |
1812 | */ |
1813 | ||
3e0fa65f | 1814 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1815 | unsigned int, flags) |
1da177e4 LT |
1816 | { |
1817 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1818 | } | |
1819 | ||
1820 | /* | |
89bddce5 | 1821 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1822 | * sender. We verify the buffers are writable and if needed move the |
1823 | * sender address from kernel to user space. | |
1824 | */ | |
1825 | ||
3e0fa65f | 1826 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1827 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1828 | int __user *, addr_len) |
1da177e4 LT |
1829 | { |
1830 | struct socket *sock; | |
1831 | struct iovec iov; | |
1832 | struct msghdr msg; | |
230b1839 | 1833 | struct sockaddr_storage address; |
89bddce5 | 1834 | int err, err2; |
6cb153ca BL |
1835 | int fput_needed; |
1836 | ||
253eacc0 LT |
1837 | if (size > INT_MAX) |
1838 | size = INT_MAX; | |
de0fa95c | 1839 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1840 | if (!sock) |
de0fa95c | 1841 | goto out; |
1da177e4 | 1842 | |
89bddce5 SH |
1843 | msg.msg_control = NULL; |
1844 | msg.msg_controllen = 0; | |
1845 | msg.msg_iovlen = 1; | |
1846 | msg.msg_iov = &iov; | |
1847 | iov.iov_len = size; | |
1848 | iov.iov_base = ubuf; | |
230b1839 YH |
1849 | msg.msg_name = (struct sockaddr *)&address; |
1850 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1851 | if (sock->file->f_flags & O_NONBLOCK) |
1852 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1853 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1854 | |
89bddce5 | 1855 | if (err >= 0 && addr != NULL) { |
43db362d | 1856 | err2 = move_addr_to_user(&address, |
230b1839 | 1857 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1858 | if (err2 < 0) |
1859 | err = err2; | |
1da177e4 | 1860 | } |
de0fa95c PE |
1861 | |
1862 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1863 | out: |
1da177e4 LT |
1864 | return err; |
1865 | } | |
1866 | ||
1867 | /* | |
89bddce5 | 1868 | * Receive a datagram from a socket. |
1da177e4 LT |
1869 | */ |
1870 | ||
89bddce5 | 1871 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
95c96174 | 1872 | unsigned int flags) |
1da177e4 LT |
1873 | { |
1874 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1875 | } | |
1876 | ||
1877 | /* | |
1878 | * Set a socket option. Because we don't know the option lengths we have | |
1879 | * to pass the user mode parameter for the protocols to sort out. | |
1880 | */ | |
1881 | ||
20f37034 HC |
1882 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1883 | char __user *, optval, int, optlen) | |
1da177e4 | 1884 | { |
6cb153ca | 1885 | int err, fput_needed; |
1da177e4 LT |
1886 | struct socket *sock; |
1887 | ||
1888 | if (optlen < 0) | |
1889 | return -EINVAL; | |
89bddce5 SH |
1890 | |
1891 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1892 | if (sock != NULL) { | |
1893 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1894 | if (err) |
1895 | goto out_put; | |
1da177e4 LT |
1896 | |
1897 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1898 | err = |
1899 | sock_setsockopt(sock, level, optname, optval, | |
1900 | optlen); | |
1da177e4 | 1901 | else |
89bddce5 SH |
1902 | err = |
1903 | sock->ops->setsockopt(sock, level, optname, optval, | |
1904 | optlen); | |
6cb153ca BL |
1905 | out_put: |
1906 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1907 | } |
1908 | return err; | |
1909 | } | |
1910 | ||
1911 | /* | |
1912 | * Get a socket option. Because we don't know the option lengths we have | |
1913 | * to pass a user mode parameter for the protocols to sort out. | |
1914 | */ | |
1915 | ||
20f37034 HC |
1916 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1917 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1918 | { |
6cb153ca | 1919 | int err, fput_needed; |
1da177e4 LT |
1920 | struct socket *sock; |
1921 | ||
89bddce5 SH |
1922 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1923 | if (sock != NULL) { | |
6cb153ca BL |
1924 | err = security_socket_getsockopt(sock, level, optname); |
1925 | if (err) | |
1926 | goto out_put; | |
1da177e4 LT |
1927 | |
1928 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1929 | err = |
1930 | sock_getsockopt(sock, level, optname, optval, | |
1931 | optlen); | |
1da177e4 | 1932 | else |
89bddce5 SH |
1933 | err = |
1934 | sock->ops->getsockopt(sock, level, optname, optval, | |
1935 | optlen); | |
6cb153ca BL |
1936 | out_put: |
1937 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1938 | } |
1939 | return err; | |
1940 | } | |
1941 | ||
1da177e4 LT |
1942 | /* |
1943 | * Shutdown a socket. | |
1944 | */ | |
1945 | ||
754fe8d2 | 1946 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1947 | { |
6cb153ca | 1948 | int err, fput_needed; |
1da177e4 LT |
1949 | struct socket *sock; |
1950 | ||
89bddce5 SH |
1951 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1952 | if (sock != NULL) { | |
1da177e4 | 1953 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1954 | if (!err) |
1955 | err = sock->ops->shutdown(sock, how); | |
1956 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1957 | } |
1958 | return err; | |
1959 | } | |
1960 | ||
89bddce5 | 1961 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1962 | * fields which are the same type (int / unsigned) on our platforms. |
1963 | */ | |
1964 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1965 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1966 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1967 | ||
c71d8ebe TH |
1968 | struct used_address { |
1969 | struct sockaddr_storage name; | |
1970 | unsigned int name_len; | |
1971 | }; | |
1972 | ||
228e548e | 1973 | static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 1974 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1975 | struct used_address *used_address) |
1da177e4 | 1976 | { |
89bddce5 SH |
1977 | struct compat_msghdr __user *msg_compat = |
1978 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1979 | struct sockaddr_storage address; |
1da177e4 | 1980 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1981 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1982 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1983 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 1984 | unsigned char *ctl_buf = ctl; |
a74e9106 | 1985 | int err, ctl_len, total_len; |
89bddce5 | 1986 | |
1da177e4 LT |
1987 | err = -EFAULT; |
1988 | if (MSG_CMSG_COMPAT & flags) { | |
228e548e | 1989 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1990 | return -EFAULT; |
228e548e | 1991 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
1da177e4 LT |
1992 | return -EFAULT; |
1993 | ||
228e548e | 1994 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
1995 | err = -EMSGSIZE; |
1996 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
1997 | goto out; | |
1998 | err = -ENOMEM; | |
1999 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2000 | GFP_KERNEL); | |
1da177e4 | 2001 | if (!iov) |
228e548e | 2002 | goto out; |
1da177e4 LT |
2003 | } |
2004 | ||
2005 | /* This will also move the address data into kernel space */ | |
2006 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2007 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 2008 | } else |
43db362d | 2009 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 2010 | if (err < 0) |
1da177e4 LT |
2011 | goto out_freeiov; |
2012 | total_len = err; | |
2013 | ||
2014 | err = -ENOBUFS; | |
2015 | ||
228e548e | 2016 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2017 | goto out_freeiov; |
228e548e | 2018 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2019 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2020 | err = |
228e548e | 2021 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2022 | sizeof(ctl)); |
1da177e4 LT |
2023 | if (err) |
2024 | goto out_freeiov; | |
228e548e AB |
2025 | ctl_buf = msg_sys->msg_control; |
2026 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2027 | } else if (ctl_len) { |
89bddce5 | 2028 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2029 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2030 | if (ctl_buf == NULL) |
1da177e4 LT |
2031 | goto out_freeiov; |
2032 | } | |
2033 | err = -EFAULT; | |
2034 | /* | |
228e548e | 2035 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2036 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2037 | * checking falls down on this. | |
2038 | */ | |
fb8621bb | 2039 | if (copy_from_user(ctl_buf, |
228e548e | 2040 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2041 | ctl_len)) |
1da177e4 | 2042 | goto out_freectl; |
228e548e | 2043 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2044 | } |
228e548e | 2045 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2046 | |
2047 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2048 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2049 | /* |
2050 | * If this is sendmmsg() and current destination address is same as | |
2051 | * previously succeeded address, omit asking LSM's decision. | |
2052 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2053 | * destination address never matches. | |
2054 | */ | |
bc909d9d MD |
2055 | if (used_address && msg_sys->msg_name && |
2056 | used_address->name_len == msg_sys->msg_namelen && | |
2057 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2058 | used_address->name_len)) { |
2059 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2060 | goto out_freectl; | |
2061 | } | |
2062 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2063 | /* | |
2064 | * If this is sendmmsg() and sending to current destination address was | |
2065 | * successful, remember it. | |
2066 | */ | |
2067 | if (used_address && err >= 0) { | |
2068 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2069 | if (msg_sys->msg_name) |
2070 | memcpy(&used_address->name, msg_sys->msg_name, | |
2071 | used_address->name_len); | |
c71d8ebe | 2072 | } |
1da177e4 LT |
2073 | |
2074 | out_freectl: | |
89bddce5 | 2075 | if (ctl_buf != ctl) |
1da177e4 LT |
2076 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2077 | out_freeiov: | |
2078 | if (iov != iovstack) | |
a74e9106 | 2079 | kfree(iov); |
228e548e AB |
2080 | out: |
2081 | return err; | |
2082 | } | |
2083 | ||
2084 | /* | |
2085 | * BSD sendmsg interface | |
2086 | */ | |
2087 | ||
95c96174 | 2088 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
228e548e AB |
2089 | { |
2090 | int fput_needed, err; | |
2091 | struct msghdr msg_sys; | |
2092 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2093 | ||
2094 | if (!sock) | |
2095 | goto out; | |
2096 | ||
c71d8ebe | 2097 | err = __sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2098 | |
6cb153ca | 2099 | fput_light(sock->file, fput_needed); |
89bddce5 | 2100 | out: |
1da177e4 LT |
2101 | return err; |
2102 | } | |
2103 | ||
228e548e AB |
2104 | /* |
2105 | * Linux sendmmsg interface | |
2106 | */ | |
2107 | ||
2108 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2109 | unsigned int flags) | |
2110 | { | |
2111 | int fput_needed, err, datagrams; | |
2112 | struct socket *sock; | |
2113 | struct mmsghdr __user *entry; | |
2114 | struct compat_mmsghdr __user *compat_entry; | |
2115 | struct msghdr msg_sys; | |
c71d8ebe | 2116 | struct used_address used_address; |
228e548e | 2117 | |
98382f41 AB |
2118 | if (vlen > UIO_MAXIOV) |
2119 | vlen = UIO_MAXIOV; | |
228e548e AB |
2120 | |
2121 | datagrams = 0; | |
2122 | ||
2123 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2124 | if (!sock) | |
2125 | return err; | |
2126 | ||
c71d8ebe | 2127 | used_address.name_len = UINT_MAX; |
228e548e AB |
2128 | entry = mmsg; |
2129 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2130 | err = 0; |
228e548e AB |
2131 | |
2132 | while (datagrams < vlen) { | |
228e548e AB |
2133 | if (MSG_CMSG_COMPAT & flags) { |
2134 | err = __sys_sendmsg(sock, (struct msghdr __user *)compat_entry, | |
c71d8ebe | 2135 | &msg_sys, flags, &used_address); |
228e548e AB |
2136 | if (err < 0) |
2137 | break; | |
2138 | err = __put_user(err, &compat_entry->msg_len); | |
2139 | ++compat_entry; | |
2140 | } else { | |
2141 | err = __sys_sendmsg(sock, (struct msghdr __user *)entry, | |
c71d8ebe | 2142 | &msg_sys, flags, &used_address); |
228e548e AB |
2143 | if (err < 0) |
2144 | break; | |
2145 | err = put_user(err, &entry->msg_len); | |
2146 | ++entry; | |
2147 | } | |
2148 | ||
2149 | if (err) | |
2150 | break; | |
2151 | ++datagrams; | |
2152 | } | |
2153 | ||
228e548e AB |
2154 | fput_light(sock->file, fput_needed); |
2155 | ||
728ffb86 AB |
2156 | /* We only return an error if no datagrams were able to be sent */ |
2157 | if (datagrams != 0) | |
228e548e AB |
2158 | return datagrams; |
2159 | ||
228e548e AB |
2160 | return err; |
2161 | } | |
2162 | ||
2163 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2164 | unsigned int, vlen, unsigned int, flags) | |
2165 | { | |
2166 | return __sys_sendmmsg(fd, mmsg, vlen, flags); | |
2167 | } | |
2168 | ||
a2e27255 | 2169 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2170 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2171 | { |
89bddce5 SH |
2172 | struct compat_msghdr __user *msg_compat = |
2173 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2174 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2175 | struct iovec *iov = iovstack; |
1da177e4 | 2176 | unsigned long cmsg_ptr; |
a74e9106 | 2177 | int err, total_len, len; |
1da177e4 LT |
2178 | |
2179 | /* kernel mode address */ | |
230b1839 | 2180 | struct sockaddr_storage addr; |
1da177e4 LT |
2181 | |
2182 | /* user mode address pointers */ | |
2183 | struct sockaddr __user *uaddr; | |
2184 | int __user *uaddr_len; | |
89bddce5 | 2185 | |
1da177e4 | 2186 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2187 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2188 | return -EFAULT; |
c6d409cf | 2189 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 2190 | return -EFAULT; |
1da177e4 | 2191 | |
a2e27255 | 2192 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2193 | err = -EMSGSIZE; |
2194 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2195 | goto out; | |
2196 | err = -ENOMEM; | |
2197 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2198 | GFP_KERNEL); | |
1da177e4 | 2199 | if (!iov) |
a2e27255 | 2200 | goto out; |
1da177e4 LT |
2201 | } |
2202 | ||
2203 | /* | |
89bddce5 SH |
2204 | * Save the user-mode address (verify_iovec will change the |
2205 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2206 | */ |
89bddce5 | 2207 | |
a2e27255 | 2208 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2209 | uaddr_len = COMPAT_NAMELEN(msg); |
2210 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2211 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 | 2212 | } else |
43db362d | 2213 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2214 | if (err < 0) |
2215 | goto out_freeiov; | |
89bddce5 | 2216 | total_len = err; |
1da177e4 | 2217 | |
a2e27255 ACM |
2218 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2219 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2220 | |
1da177e4 LT |
2221 | if (sock->file->f_flags & O_NONBLOCK) |
2222 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2223 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2224 | total_len, flags); | |
1da177e4 LT |
2225 | if (err < 0) |
2226 | goto out_freeiov; | |
2227 | len = err; | |
2228 | ||
2229 | if (uaddr != NULL) { | |
43db362d | 2230 | err = move_addr_to_user(&addr, |
a2e27255 | 2231 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2232 | uaddr_len); |
1da177e4 LT |
2233 | if (err < 0) |
2234 | goto out_freeiov; | |
2235 | } | |
a2e27255 | 2236 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2237 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2238 | if (err) |
2239 | goto out_freeiov; | |
2240 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2241 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2242 | &msg_compat->msg_controllen); |
2243 | else | |
a2e27255 | 2244 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2245 | &msg->msg_controllen); |
2246 | if (err) | |
2247 | goto out_freeiov; | |
2248 | err = len; | |
2249 | ||
2250 | out_freeiov: | |
2251 | if (iov != iovstack) | |
a74e9106 | 2252 | kfree(iov); |
a2e27255 ACM |
2253 | out: |
2254 | return err; | |
2255 | } | |
2256 | ||
2257 | /* | |
2258 | * BSD recvmsg interface | |
2259 | */ | |
2260 | ||
2261 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2262 | unsigned int, flags) | |
2263 | { | |
2264 | int fput_needed, err; | |
2265 | struct msghdr msg_sys; | |
2266 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2267 | ||
2268 | if (!sock) | |
2269 | goto out; | |
2270 | ||
2271 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2272 | ||
6cb153ca | 2273 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2274 | out: |
2275 | return err; | |
2276 | } | |
2277 | ||
a2e27255 ACM |
2278 | /* |
2279 | * Linux recvmmsg interface | |
2280 | */ | |
2281 | ||
2282 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2283 | unsigned int flags, struct timespec *timeout) | |
2284 | { | |
2285 | int fput_needed, err, datagrams; | |
2286 | struct socket *sock; | |
2287 | struct mmsghdr __user *entry; | |
d7256d0e | 2288 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2289 | struct msghdr msg_sys; |
2290 | struct timespec end_time; | |
2291 | ||
2292 | if (timeout && | |
2293 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2294 | timeout->tv_nsec)) | |
2295 | return -EINVAL; | |
2296 | ||
2297 | datagrams = 0; | |
2298 | ||
2299 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2300 | if (!sock) | |
2301 | return err; | |
2302 | ||
2303 | err = sock_error(sock->sk); | |
2304 | if (err) | |
2305 | goto out_put; | |
2306 | ||
2307 | entry = mmsg; | |
d7256d0e | 2308 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2309 | |
2310 | while (datagrams < vlen) { | |
2311 | /* | |
2312 | * No need to ask LSM for more than the first datagram. | |
2313 | */ | |
d7256d0e JMG |
2314 | if (MSG_CMSG_COMPAT & flags) { |
2315 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
b9eb8b87 AB |
2316 | &msg_sys, flags & ~MSG_WAITFORONE, |
2317 | datagrams); | |
d7256d0e JMG |
2318 | if (err < 0) |
2319 | break; | |
2320 | err = __put_user(err, &compat_entry->msg_len); | |
2321 | ++compat_entry; | |
2322 | } else { | |
2323 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
b9eb8b87 AB |
2324 | &msg_sys, flags & ~MSG_WAITFORONE, |
2325 | datagrams); | |
d7256d0e JMG |
2326 | if (err < 0) |
2327 | break; | |
2328 | err = put_user(err, &entry->msg_len); | |
2329 | ++entry; | |
2330 | } | |
2331 | ||
a2e27255 ACM |
2332 | if (err) |
2333 | break; | |
a2e27255 ACM |
2334 | ++datagrams; |
2335 | ||
71c5c159 BB |
2336 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2337 | if (flags & MSG_WAITFORONE) | |
2338 | flags |= MSG_DONTWAIT; | |
2339 | ||
a2e27255 ACM |
2340 | if (timeout) { |
2341 | ktime_get_ts(timeout); | |
2342 | *timeout = timespec_sub(end_time, *timeout); | |
2343 | if (timeout->tv_sec < 0) { | |
2344 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2345 | break; | |
2346 | } | |
2347 | ||
2348 | /* Timeout, return less than vlen datagrams */ | |
2349 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2350 | break; | |
2351 | } | |
2352 | ||
2353 | /* Out of band data, return right away */ | |
2354 | if (msg_sys.msg_flags & MSG_OOB) | |
2355 | break; | |
2356 | } | |
2357 | ||
2358 | out_put: | |
2359 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2360 | |
a2e27255 ACM |
2361 | if (err == 0) |
2362 | return datagrams; | |
2363 | ||
2364 | if (datagrams != 0) { | |
2365 | /* | |
2366 | * We may return less entries than requested (vlen) if the | |
2367 | * sock is non block and there aren't enough datagrams... | |
2368 | */ | |
2369 | if (err != -EAGAIN) { | |
2370 | /* | |
2371 | * ... or if recvmsg returns an error after we | |
2372 | * received some datagrams, where we record the | |
2373 | * error to return on the next call or if the | |
2374 | * app asks about it using getsockopt(SO_ERROR). | |
2375 | */ | |
2376 | sock->sk->sk_err = -err; | |
2377 | } | |
2378 | ||
2379 | return datagrams; | |
2380 | } | |
2381 | ||
2382 | return err; | |
2383 | } | |
2384 | ||
2385 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2386 | unsigned int, vlen, unsigned int, flags, | |
2387 | struct timespec __user *, timeout) | |
2388 | { | |
2389 | int datagrams; | |
2390 | struct timespec timeout_sys; | |
2391 | ||
2392 | if (!timeout) | |
2393 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2394 | ||
2395 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2396 | return -EFAULT; | |
2397 | ||
2398 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2399 | ||
2400 | if (datagrams > 0 && | |
2401 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2402 | datagrams = -EFAULT; | |
2403 | ||
2404 | return datagrams; | |
2405 | } | |
2406 | ||
2407 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2408 | /* Argument list sizes for sys_socketcall */ |
2409 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2410 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2411 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2412 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2413 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2414 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2415 | }; |
2416 | ||
1da177e4 LT |
2417 | #undef AL |
2418 | ||
2419 | /* | |
89bddce5 | 2420 | * System call vectors. |
1da177e4 LT |
2421 | * |
2422 | * Argument checking cleaned up. Saved 20% in size. | |
2423 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2424 | * it is set by the callees. |
1da177e4 LT |
2425 | */ |
2426 | ||
3e0fa65f | 2427 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2428 | { |
2429 | unsigned long a[6]; | |
89bddce5 | 2430 | unsigned long a0, a1; |
1da177e4 | 2431 | int err; |
47379052 | 2432 | unsigned int len; |
1da177e4 | 2433 | |
228e548e | 2434 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2435 | return -EINVAL; |
2436 | ||
47379052 AV |
2437 | len = nargs[call]; |
2438 | if (len > sizeof(a)) | |
2439 | return -EINVAL; | |
2440 | ||
1da177e4 | 2441 | /* copy_from_user should be SMP safe. */ |
47379052 | 2442 | if (copy_from_user(a, args, len)) |
1da177e4 | 2443 | return -EFAULT; |
3ec3b2fb | 2444 | |
f3298dc4 | 2445 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2446 | |
89bddce5 SH |
2447 | a0 = a[0]; |
2448 | a1 = a[1]; | |
2449 | ||
2450 | switch (call) { | |
2451 | case SYS_SOCKET: | |
2452 | err = sys_socket(a0, a1, a[2]); | |
2453 | break; | |
2454 | case SYS_BIND: | |
2455 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2456 | break; | |
2457 | case SYS_CONNECT: | |
2458 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2459 | break; | |
2460 | case SYS_LISTEN: | |
2461 | err = sys_listen(a0, a1); | |
2462 | break; | |
2463 | case SYS_ACCEPT: | |
de11defe UD |
2464 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2465 | (int __user *)a[2], 0); | |
89bddce5 SH |
2466 | break; |
2467 | case SYS_GETSOCKNAME: | |
2468 | err = | |
2469 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2470 | (int __user *)a[2]); | |
2471 | break; | |
2472 | case SYS_GETPEERNAME: | |
2473 | err = | |
2474 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2475 | (int __user *)a[2]); | |
2476 | break; | |
2477 | case SYS_SOCKETPAIR: | |
2478 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2479 | break; | |
2480 | case SYS_SEND: | |
2481 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2482 | break; | |
2483 | case SYS_SENDTO: | |
2484 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2485 | (struct sockaddr __user *)a[4], a[5]); | |
2486 | break; | |
2487 | case SYS_RECV: | |
2488 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2489 | break; | |
2490 | case SYS_RECVFROM: | |
2491 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2492 | (struct sockaddr __user *)a[4], | |
2493 | (int __user *)a[5]); | |
2494 | break; | |
2495 | case SYS_SHUTDOWN: | |
2496 | err = sys_shutdown(a0, a1); | |
2497 | break; | |
2498 | case SYS_SETSOCKOPT: | |
2499 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2500 | break; | |
2501 | case SYS_GETSOCKOPT: | |
2502 | err = | |
2503 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2504 | (int __user *)a[4]); | |
2505 | break; | |
2506 | case SYS_SENDMSG: | |
2507 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2508 | break; | |
228e548e AB |
2509 | case SYS_SENDMMSG: |
2510 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2511 | break; | |
89bddce5 SH |
2512 | case SYS_RECVMSG: |
2513 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2514 | break; | |
a2e27255 ACM |
2515 | case SYS_RECVMMSG: |
2516 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2517 | (struct timespec __user *)a[4]); | |
2518 | break; | |
de11defe UD |
2519 | case SYS_ACCEPT4: |
2520 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2521 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2522 | break; |
89bddce5 SH |
2523 | default: |
2524 | err = -EINVAL; | |
2525 | break; | |
1da177e4 LT |
2526 | } |
2527 | return err; | |
2528 | } | |
2529 | ||
89bddce5 | 2530 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2531 | |
55737fda SH |
2532 | /** |
2533 | * sock_register - add a socket protocol handler | |
2534 | * @ops: description of protocol | |
2535 | * | |
1da177e4 LT |
2536 | * This function is called by a protocol handler that wants to |
2537 | * advertise its address family, and have it linked into the | |
55737fda SH |
2538 | * socket interface. The value ops->family coresponds to the |
2539 | * socket system call protocol family. | |
1da177e4 | 2540 | */ |
f0fd27d4 | 2541 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2542 | { |
2543 | int err; | |
2544 | ||
2545 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2546 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2547 | NPROTO); | |
1da177e4 LT |
2548 | return -ENOBUFS; |
2549 | } | |
55737fda SH |
2550 | |
2551 | spin_lock(&net_family_lock); | |
190683a9 ED |
2552 | if (rcu_dereference_protected(net_families[ops->family], |
2553 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2554 | err = -EEXIST; |
2555 | else { | |
cf778b00 | 2556 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2557 | err = 0; |
2558 | } | |
55737fda SH |
2559 | spin_unlock(&net_family_lock); |
2560 | ||
89bddce5 | 2561 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2562 | return err; |
2563 | } | |
c6d409cf | 2564 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2565 | |
55737fda SH |
2566 | /** |
2567 | * sock_unregister - remove a protocol handler | |
2568 | * @family: protocol family to remove | |
2569 | * | |
1da177e4 LT |
2570 | * This function is called by a protocol handler that wants to |
2571 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2572 | * new socket creation. |
2573 | * | |
2574 | * If protocol handler is a module, then it can use module reference | |
2575 | * counts to protect against new references. If protocol handler is not | |
2576 | * a module then it needs to provide its own protection in | |
2577 | * the ops->create routine. | |
1da177e4 | 2578 | */ |
f0fd27d4 | 2579 | void sock_unregister(int family) |
1da177e4 | 2580 | { |
f0fd27d4 | 2581 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2582 | |
55737fda | 2583 | spin_lock(&net_family_lock); |
a9b3cd7f | 2584 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2585 | spin_unlock(&net_family_lock); |
2586 | ||
2587 | synchronize_rcu(); | |
2588 | ||
89bddce5 | 2589 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2590 | } |
c6d409cf | 2591 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2592 | |
77d76ea3 | 2593 | static int __init sock_init(void) |
1da177e4 | 2594 | { |
b3e19d92 | 2595 | int err; |
2ca794e5 EB |
2596 | /* |
2597 | * Initialize the network sysctl infrastructure. | |
2598 | */ | |
2599 | err = net_sysctl_init(); | |
2600 | if (err) | |
2601 | goto out; | |
b3e19d92 | 2602 | |
1da177e4 | 2603 | /* |
89bddce5 | 2604 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2605 | */ |
2606 | skb_init(); | |
1da177e4 LT |
2607 | |
2608 | /* | |
89bddce5 | 2609 | * Initialize the protocols module. |
1da177e4 LT |
2610 | */ |
2611 | ||
2612 | init_inodecache(); | |
b3e19d92 NP |
2613 | |
2614 | err = register_filesystem(&sock_fs_type); | |
2615 | if (err) | |
2616 | goto out_fs; | |
1da177e4 | 2617 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2618 | if (IS_ERR(sock_mnt)) { |
2619 | err = PTR_ERR(sock_mnt); | |
2620 | goto out_mount; | |
2621 | } | |
77d76ea3 AK |
2622 | |
2623 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2624 | */ |
2625 | ||
2626 | #ifdef CONFIG_NETFILTER | |
2627 | netfilter_init(); | |
2628 | #endif | |
cbeb321a | 2629 | |
c1f19b51 RC |
2630 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2631 | skb_timestamping_init(); | |
2632 | #endif | |
2633 | ||
b3e19d92 NP |
2634 | out: |
2635 | return err; | |
2636 | ||
2637 | out_mount: | |
2638 | unregister_filesystem(&sock_fs_type); | |
2639 | out_fs: | |
2640 | goto out; | |
1da177e4 LT |
2641 | } |
2642 | ||
77d76ea3 AK |
2643 | core_initcall(sock_init); /* early initcall */ |
2644 | ||
1da177e4 LT |
2645 | #ifdef CONFIG_PROC_FS |
2646 | void socket_seq_show(struct seq_file *seq) | |
2647 | { | |
2648 | int cpu; | |
2649 | int counter = 0; | |
2650 | ||
6f912042 | 2651 | for_each_possible_cpu(cpu) |
89bddce5 | 2652 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2653 | |
2654 | /* It can be negative, by the way. 8) */ | |
2655 | if (counter < 0) | |
2656 | counter = 0; | |
2657 | ||
2658 | seq_printf(seq, "sockets: used %d\n", counter); | |
2659 | } | |
89bddce5 | 2660 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2661 | |
89bbfc95 | 2662 | #ifdef CONFIG_COMPAT |
6b96018b | 2663 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2664 | unsigned int cmd, void __user *up) |
7a229387 | 2665 | { |
7a229387 AB |
2666 | mm_segment_t old_fs = get_fs(); |
2667 | struct timeval ktv; | |
2668 | int err; | |
2669 | ||
2670 | set_fs(KERNEL_DS); | |
6b96018b | 2671 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2672 | set_fs(old_fs); |
644595f8 | 2673 | if (!err) |
ed6fe9d6 | 2674 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2675 | |
7a229387 AB |
2676 | return err; |
2677 | } | |
2678 | ||
6b96018b | 2679 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2680 | unsigned int cmd, void __user *up) |
7a229387 | 2681 | { |
7a229387 AB |
2682 | mm_segment_t old_fs = get_fs(); |
2683 | struct timespec kts; | |
2684 | int err; | |
2685 | ||
2686 | set_fs(KERNEL_DS); | |
6b96018b | 2687 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2688 | set_fs(old_fs); |
644595f8 | 2689 | if (!err) |
ed6fe9d6 | 2690 | err = compat_put_timespec(&kts, up); |
644595f8 | 2691 | |
7a229387 AB |
2692 | return err; |
2693 | } | |
2694 | ||
6b96018b | 2695 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2696 | { |
2697 | struct ifreq __user *uifr; | |
2698 | int err; | |
2699 | ||
2700 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2701 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2702 | return -EFAULT; |
2703 | ||
6b96018b | 2704 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2705 | if (err) |
2706 | return err; | |
2707 | ||
6b96018b | 2708 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2709 | return -EFAULT; |
2710 | ||
2711 | return 0; | |
2712 | } | |
2713 | ||
6b96018b | 2714 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2715 | { |
6b96018b | 2716 | struct compat_ifconf ifc32; |
7a229387 AB |
2717 | struct ifconf ifc; |
2718 | struct ifconf __user *uifc; | |
6b96018b | 2719 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2720 | struct ifreq __user *ifr; |
2721 | unsigned int i, j; | |
2722 | int err; | |
2723 | ||
6b96018b | 2724 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2725 | return -EFAULT; |
2726 | ||
43da5f2e | 2727 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2728 | if (ifc32.ifcbuf == 0) { |
2729 | ifc32.ifc_len = 0; | |
2730 | ifc.ifc_len = 0; | |
2731 | ifc.ifc_req = NULL; | |
2732 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2733 | } else { | |
c6d409cf ED |
2734 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2735 | sizeof(struct ifreq); | |
7a229387 AB |
2736 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2737 | ifc.ifc_len = len; | |
2738 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2739 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2740 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2741 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2742 | return -EFAULT; |
2743 | ifr++; | |
2744 | ifr32++; | |
2745 | } | |
2746 | } | |
2747 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2748 | return -EFAULT; | |
2749 | ||
6b96018b | 2750 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2751 | if (err) |
2752 | return err; | |
2753 | ||
2754 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2755 | return -EFAULT; | |
2756 | ||
2757 | ifr = ifc.ifc_req; | |
2758 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2759 | for (i = 0, j = 0; | |
c6d409cf ED |
2760 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2761 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2762 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2763 | return -EFAULT; |
2764 | ifr32++; | |
2765 | ifr++; | |
2766 | } | |
2767 | ||
2768 | if (ifc32.ifcbuf == 0) { | |
2769 | /* Translate from 64-bit structure multiple to | |
2770 | * a 32-bit one. | |
2771 | */ | |
2772 | i = ifc.ifc_len; | |
6b96018b | 2773 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2774 | ifc32.ifc_len = i; |
2775 | } else { | |
2776 | ifc32.ifc_len = i; | |
2777 | } | |
6b96018b | 2778 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2779 | return -EFAULT; |
2780 | ||
2781 | return 0; | |
2782 | } | |
2783 | ||
6b96018b | 2784 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2785 | { |
3a7da39d BH |
2786 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2787 | bool convert_in = false, convert_out = false; | |
2788 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2789 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2790 | struct ifreq __user *ifr; |
3a7da39d BH |
2791 | u32 rule_cnt = 0, actual_rule_cnt; |
2792 | u32 ethcmd; | |
7a229387 | 2793 | u32 data; |
3a7da39d | 2794 | int ret; |
7a229387 | 2795 | |
3a7da39d BH |
2796 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2797 | return -EFAULT; | |
7a229387 | 2798 | |
3a7da39d BH |
2799 | compat_rxnfc = compat_ptr(data); |
2800 | ||
2801 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2802 | return -EFAULT; |
2803 | ||
3a7da39d BH |
2804 | /* Most ethtool structures are defined without padding. |
2805 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2806 | */ | |
2807 | switch (ethcmd) { | |
2808 | default: | |
2809 | break; | |
2810 | case ETHTOOL_GRXCLSRLALL: | |
2811 | /* Buffer size is variable */ | |
2812 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2813 | return -EFAULT; | |
2814 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2815 | return -ENOMEM; | |
2816 | buf_size += rule_cnt * sizeof(u32); | |
2817 | /* fall through */ | |
2818 | case ETHTOOL_GRXRINGS: | |
2819 | case ETHTOOL_GRXCLSRLCNT: | |
2820 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2821 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2822 | convert_out = true; |
2823 | /* fall through */ | |
2824 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2825 | buf_size += sizeof(struct ethtool_rxnfc); |
2826 | convert_in = true; | |
2827 | break; | |
2828 | } | |
2829 | ||
2830 | ifr = compat_alloc_user_space(buf_size); | |
2831 | rxnfc = (void *)ifr + ALIGN(sizeof(struct ifreq), 8); | |
2832 | ||
2833 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2834 | return -EFAULT; |
2835 | ||
3a7da39d BH |
2836 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2837 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2838 | return -EFAULT; |
2839 | ||
3a7da39d | 2840 | if (convert_in) { |
127fe533 | 2841 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2842 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2843 | */ | |
127fe533 AD |
2844 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2845 | sizeof(compat_rxnfc->fs.m_ext) != | |
2846 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2847 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2848 | BUILD_BUG_ON( |
2849 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2850 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2851 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2852 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2853 | ||
2854 | if (copy_in_user(rxnfc, compat_rxnfc, | |
127fe533 | 2855 | (void *)(&rxnfc->fs.m_ext + 1) - |
3a7da39d BH |
2856 | (void *)rxnfc) || |
2857 | copy_in_user(&rxnfc->fs.ring_cookie, | |
2858 | &compat_rxnfc->fs.ring_cookie, | |
2859 | (void *)(&rxnfc->fs.location + 1) - | |
2860 | (void *)&rxnfc->fs.ring_cookie) || | |
2861 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, | |
2862 | sizeof(rxnfc->rule_cnt))) | |
2863 | return -EFAULT; | |
2864 | } | |
2865 | ||
2866 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2867 | if (ret) | |
2868 | return ret; | |
2869 | ||
2870 | if (convert_out) { | |
2871 | if (copy_in_user(compat_rxnfc, rxnfc, | |
127fe533 | 2872 | (const void *)(&rxnfc->fs.m_ext + 1) - |
3a7da39d BH |
2873 | (const void *)rxnfc) || |
2874 | copy_in_user(&compat_rxnfc->fs.ring_cookie, | |
2875 | &rxnfc->fs.ring_cookie, | |
2876 | (const void *)(&rxnfc->fs.location + 1) - | |
2877 | (const void *)&rxnfc->fs.ring_cookie) || | |
2878 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, | |
2879 | sizeof(rxnfc->rule_cnt))) | |
2880 | return -EFAULT; | |
2881 | ||
2882 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2883 | /* As an optimisation, we only copy the actual | |
2884 | * number of rules that the underlying | |
2885 | * function returned. Since Mallory might | |
2886 | * change the rule count in user memory, we | |
2887 | * check that it is less than the rule count | |
2888 | * originally given (as the user buffer size), | |
2889 | * which has been range-checked. | |
2890 | */ | |
2891 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2892 | return -EFAULT; | |
2893 | if (actual_rule_cnt < rule_cnt) | |
2894 | rule_cnt = actual_rule_cnt; | |
2895 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2896 | &rxnfc->rule_locs[0], | |
2897 | rule_cnt * sizeof(u32))) | |
2898 | return -EFAULT; | |
2899 | } | |
2900 | } | |
2901 | ||
2902 | return 0; | |
7a229387 AB |
2903 | } |
2904 | ||
7a50a240 AB |
2905 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2906 | { | |
2907 | void __user *uptr; | |
2908 | compat_uptr_t uptr32; | |
2909 | struct ifreq __user *uifr; | |
2910 | ||
c6d409cf | 2911 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2912 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2913 | return -EFAULT; | |
2914 | ||
2915 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2916 | return -EFAULT; | |
2917 | ||
2918 | uptr = compat_ptr(uptr32); | |
2919 | ||
2920 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2921 | return -EFAULT; | |
2922 | ||
2923 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2924 | } | |
2925 | ||
6b96018b AB |
2926 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2927 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2928 | { |
2929 | struct ifreq kifr; | |
2930 | struct ifreq __user *uifr; | |
7a229387 AB |
2931 | mm_segment_t old_fs; |
2932 | int err; | |
2933 | u32 data; | |
2934 | void __user *datap; | |
2935 | ||
2936 | switch (cmd) { | |
2937 | case SIOCBONDENSLAVE: | |
2938 | case SIOCBONDRELEASE: | |
2939 | case SIOCBONDSETHWADDR: | |
2940 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2941 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2942 | return -EFAULT; |
2943 | ||
2944 | old_fs = get_fs(); | |
c6d409cf | 2945 | set_fs(KERNEL_DS); |
c3f52ae6 | 2946 | err = dev_ioctl(net, cmd, |
2947 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2948 | set_fs(old_fs); |
7a229387 AB |
2949 | |
2950 | return err; | |
2951 | case SIOCBONDSLAVEINFOQUERY: | |
2952 | case SIOCBONDINFOQUERY: | |
2953 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2954 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2955 | return -EFAULT; | |
2956 | ||
2957 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2958 | return -EFAULT; | |
2959 | ||
2960 | datap = compat_ptr(data); | |
2961 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2962 | return -EFAULT; | |
2963 | ||
6b96018b | 2964 | return dev_ioctl(net, cmd, uifr); |
7a229387 | 2965 | default: |
07d106d0 | 2966 | return -ENOIOCTLCMD; |
ccbd6a5a | 2967 | } |
7a229387 AB |
2968 | } |
2969 | ||
6b96018b AB |
2970 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2971 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2972 | { |
2973 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2974 | char tmp_buf[IFNAMSIZ]; |
2975 | void __user *data64; | |
2976 | u32 data32; | |
2977 | ||
2978 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2979 | IFNAMSIZ)) | |
2980 | return -EFAULT; | |
2981 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2982 | return -EFAULT; | |
2983 | data64 = compat_ptr(data32); | |
2984 | ||
2985 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2986 | ||
2987 | /* Don't check these user accesses, just let that get trapped | |
2988 | * in the ioctl handler instead. | |
2989 | */ | |
2990 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2991 | IFNAMSIZ)) | |
2992 | return -EFAULT; | |
2993 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2994 | return -EFAULT; | |
2995 | ||
6b96018b | 2996 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2997 | } |
2998 | ||
6b96018b AB |
2999 | static int dev_ifsioc(struct net *net, struct socket *sock, |
3000 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 3001 | { |
a2116ed2 | 3002 | struct ifreq __user *uifr; |
7a229387 AB |
3003 | int err; |
3004 | ||
a2116ed2 AB |
3005 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
3006 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
3007 | return -EFAULT; | |
3008 | ||
3009 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
3010 | ||
7a229387 AB |
3011 | if (!err) { |
3012 | switch (cmd) { | |
3013 | case SIOCGIFFLAGS: | |
3014 | case SIOCGIFMETRIC: | |
3015 | case SIOCGIFMTU: | |
3016 | case SIOCGIFMEM: | |
3017 | case SIOCGIFHWADDR: | |
3018 | case SIOCGIFINDEX: | |
3019 | case SIOCGIFADDR: | |
3020 | case SIOCGIFBRDADDR: | |
3021 | case SIOCGIFDSTADDR: | |
3022 | case SIOCGIFNETMASK: | |
fab2532b | 3023 | case SIOCGIFPFLAGS: |
7a229387 | 3024 | case SIOCGIFTXQLEN: |
fab2532b AB |
3025 | case SIOCGMIIPHY: |
3026 | case SIOCGMIIREG: | |
a2116ed2 | 3027 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
3028 | err = -EFAULT; |
3029 | break; | |
3030 | } | |
3031 | } | |
3032 | return err; | |
3033 | } | |
3034 | ||
a2116ed2 AB |
3035 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3036 | struct compat_ifreq __user *uifr32) | |
3037 | { | |
3038 | struct ifreq ifr; | |
3039 | struct compat_ifmap __user *uifmap32; | |
3040 | mm_segment_t old_fs; | |
3041 | int err; | |
3042 | ||
3043 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3044 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3045 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3046 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3047 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3048 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3049 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3050 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
3051 | if (err) | |
3052 | return -EFAULT; | |
3053 | ||
3054 | old_fs = get_fs(); | |
c6d409cf | 3055 | set_fs(KERNEL_DS); |
c3f52ae6 | 3056 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3057 | set_fs(old_fs); |
a2116ed2 AB |
3058 | |
3059 | if (cmd == SIOCGIFMAP && !err) { | |
3060 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3061 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3062 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3063 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3064 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3065 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3066 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
3067 | if (err) | |
3068 | err = -EFAULT; | |
3069 | } | |
3070 | return err; | |
3071 | } | |
3072 | ||
3073 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
3074 | { | |
3075 | void __user *uptr; | |
3076 | compat_uptr_t uptr32; | |
3077 | struct ifreq __user *uifr; | |
3078 | ||
c6d409cf | 3079 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
a2116ed2 AB |
3080 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
3081 | return -EFAULT; | |
3082 | ||
3083 | if (get_user(uptr32, &uifr32->ifr_data)) | |
3084 | return -EFAULT; | |
3085 | ||
3086 | uptr = compat_ptr(uptr32); | |
3087 | ||
3088 | if (put_user(uptr, &uifr->ifr_data)) | |
3089 | return -EFAULT; | |
3090 | ||
3091 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
3092 | } | |
3093 | ||
7a229387 | 3094 | struct rtentry32 { |
c6d409cf | 3095 | u32 rt_pad1; |
7a229387 AB |
3096 | struct sockaddr rt_dst; /* target address */ |
3097 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3098 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3099 | unsigned short rt_flags; |
3100 | short rt_pad2; | |
3101 | u32 rt_pad3; | |
3102 | unsigned char rt_tos; | |
3103 | unsigned char rt_class; | |
3104 | short rt_pad4; | |
3105 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3106 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3107 | u32 rt_mtu; /* per route MTU/Window */ |
3108 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3109 | unsigned short rt_irtt; /* Initial RTT */ |
3110 | }; | |
3111 | ||
3112 | struct in6_rtmsg32 { | |
3113 | struct in6_addr rtmsg_dst; | |
3114 | struct in6_addr rtmsg_src; | |
3115 | struct in6_addr rtmsg_gateway; | |
3116 | u32 rtmsg_type; | |
3117 | u16 rtmsg_dst_len; | |
3118 | u16 rtmsg_src_len; | |
3119 | u32 rtmsg_metric; | |
3120 | u32 rtmsg_info; | |
3121 | u32 rtmsg_flags; | |
3122 | s32 rtmsg_ifindex; | |
3123 | }; | |
3124 | ||
6b96018b AB |
3125 | static int routing_ioctl(struct net *net, struct socket *sock, |
3126 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3127 | { |
3128 | int ret; | |
3129 | void *r = NULL; | |
3130 | struct in6_rtmsg r6; | |
3131 | struct rtentry r4; | |
3132 | char devname[16]; | |
3133 | u32 rtdev; | |
3134 | mm_segment_t old_fs = get_fs(); | |
3135 | ||
6b96018b AB |
3136 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3137 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3138 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3139 | 3 * sizeof(struct in6_addr)); |
c6d409cf ED |
3140 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3141 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3142 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3143 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3144 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3145 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3146 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3147 | |
3148 | r = (void *) &r6; | |
3149 | } else { /* ipv4 */ | |
6b96018b | 3150 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3151 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3152 | 3 * sizeof(struct sockaddr)); |
c6d409cf ED |
3153 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
3154 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3155 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3156 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
3157 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3158 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3159 | if (rtdev) { |
c6d409cf | 3160 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3161 | r4.rt_dev = (char __user __force *)devname; |
3162 | devname[15] = 0; | |
7a229387 AB |
3163 | } else |
3164 | r4.rt_dev = NULL; | |
3165 | ||
3166 | r = (void *) &r4; | |
3167 | } | |
3168 | ||
3169 | if (ret) { | |
3170 | ret = -EFAULT; | |
3171 | goto out; | |
3172 | } | |
3173 | ||
c6d409cf | 3174 | set_fs(KERNEL_DS); |
6b96018b | 3175 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3176 | set_fs(old_fs); |
7a229387 AB |
3177 | |
3178 | out: | |
7a229387 AB |
3179 | return ret; |
3180 | } | |
3181 | ||
3182 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3183 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3184 | * use compatible ioctls |
7a229387 | 3185 | */ |
6b96018b | 3186 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3187 | { |
6b96018b | 3188 | compat_ulong_t tmp; |
7a229387 | 3189 | |
6b96018b | 3190 | if (get_user(tmp, argp)) |
7a229387 AB |
3191 | return -EFAULT; |
3192 | if (tmp == BRCTL_GET_VERSION) | |
3193 | return BRCTL_VERSION + 1; | |
3194 | return -EINVAL; | |
3195 | } | |
3196 | ||
6b96018b AB |
3197 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3198 | unsigned int cmd, unsigned long arg) | |
3199 | { | |
3200 | void __user *argp = compat_ptr(arg); | |
3201 | struct sock *sk = sock->sk; | |
3202 | struct net *net = sock_net(sk); | |
7a229387 | 3203 | |
6b96018b AB |
3204 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
3205 | return siocdevprivate_ioctl(net, cmd, argp); | |
3206 | ||
3207 | switch (cmd) { | |
3208 | case SIOCSIFBR: | |
3209 | case SIOCGIFBR: | |
3210 | return old_bridge_ioctl(argp); | |
3211 | case SIOCGIFNAME: | |
3212 | return dev_ifname32(net, argp); | |
3213 | case SIOCGIFCONF: | |
3214 | return dev_ifconf(net, argp); | |
3215 | case SIOCETHTOOL: | |
3216 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3217 | case SIOCWANDEV: |
3218 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3219 | case SIOCGIFMAP: |
3220 | case SIOCSIFMAP: | |
3221 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3222 | case SIOCBONDENSLAVE: |
3223 | case SIOCBONDRELEASE: | |
3224 | case SIOCBONDSETHWADDR: | |
3225 | case SIOCBONDSLAVEINFOQUERY: | |
3226 | case SIOCBONDINFOQUERY: | |
3227 | case SIOCBONDCHANGEACTIVE: | |
3228 | return bond_ioctl(net, cmd, argp); | |
3229 | case SIOCADDRT: | |
3230 | case SIOCDELRT: | |
3231 | return routing_ioctl(net, sock, cmd, argp); | |
3232 | case SIOCGSTAMP: | |
3233 | return do_siocgstamp(net, sock, cmd, argp); | |
3234 | case SIOCGSTAMPNS: | |
3235 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
3236 | case SIOCSHWTSTAMP: |
3237 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
3238 | |
3239 | case FIOSETOWN: | |
3240 | case SIOCSPGRP: | |
3241 | case FIOGETOWN: | |
3242 | case SIOCGPGRP: | |
3243 | case SIOCBRADDBR: | |
3244 | case SIOCBRDELBR: | |
3245 | case SIOCGIFVLAN: | |
3246 | case SIOCSIFVLAN: | |
3247 | case SIOCADDDLCI: | |
3248 | case SIOCDELDLCI: | |
3249 | return sock_ioctl(file, cmd, arg); | |
3250 | ||
3251 | case SIOCGIFFLAGS: | |
3252 | case SIOCSIFFLAGS: | |
3253 | case SIOCGIFMETRIC: | |
3254 | case SIOCSIFMETRIC: | |
3255 | case SIOCGIFMTU: | |
3256 | case SIOCSIFMTU: | |
3257 | case SIOCGIFMEM: | |
3258 | case SIOCSIFMEM: | |
3259 | case SIOCGIFHWADDR: | |
3260 | case SIOCSIFHWADDR: | |
3261 | case SIOCADDMULTI: | |
3262 | case SIOCDELMULTI: | |
3263 | case SIOCGIFINDEX: | |
6b96018b AB |
3264 | case SIOCGIFADDR: |
3265 | case SIOCSIFADDR: | |
3266 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3267 | case SIOCDIFADDR: |
6b96018b AB |
3268 | case SIOCGIFBRDADDR: |
3269 | case SIOCSIFBRDADDR: | |
3270 | case SIOCGIFDSTADDR: | |
3271 | case SIOCSIFDSTADDR: | |
3272 | case SIOCGIFNETMASK: | |
3273 | case SIOCSIFNETMASK: | |
3274 | case SIOCSIFPFLAGS: | |
3275 | case SIOCGIFPFLAGS: | |
3276 | case SIOCGIFTXQLEN: | |
3277 | case SIOCSIFTXQLEN: | |
3278 | case SIOCBRADDIF: | |
3279 | case SIOCBRDELIF: | |
9177efd3 AB |
3280 | case SIOCSIFNAME: |
3281 | case SIOCGMIIPHY: | |
3282 | case SIOCGMIIREG: | |
3283 | case SIOCSMIIREG: | |
6b96018b | 3284 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3285 | |
6b96018b AB |
3286 | case SIOCSARP: |
3287 | case SIOCGARP: | |
3288 | case SIOCDARP: | |
6b96018b | 3289 | case SIOCATMARK: |
9177efd3 AB |
3290 | return sock_do_ioctl(net, sock, cmd, arg); |
3291 | } | |
3292 | ||
6b96018b AB |
3293 | return -ENOIOCTLCMD; |
3294 | } | |
7a229387 | 3295 | |
95c96174 | 3296 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3297 | unsigned long arg) |
89bbfc95 SP |
3298 | { |
3299 | struct socket *sock = file->private_data; | |
3300 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3301 | struct sock *sk; |
3302 | struct net *net; | |
3303 | ||
3304 | sk = sock->sk; | |
3305 | net = sock_net(sk); | |
89bbfc95 SP |
3306 | |
3307 | if (sock->ops->compat_ioctl) | |
3308 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3309 | ||
87de87d5 DM |
3310 | if (ret == -ENOIOCTLCMD && |
3311 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3312 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3313 | ||
6b96018b AB |
3314 | if (ret == -ENOIOCTLCMD) |
3315 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3316 | ||
89bbfc95 SP |
3317 | return ret; |
3318 | } | |
3319 | #endif | |
3320 | ||
ac5a488e SS |
3321 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3322 | { | |
3323 | return sock->ops->bind(sock, addr, addrlen); | |
3324 | } | |
c6d409cf | 3325 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3326 | |
3327 | int kernel_listen(struct socket *sock, int backlog) | |
3328 | { | |
3329 | return sock->ops->listen(sock, backlog); | |
3330 | } | |
c6d409cf | 3331 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3332 | |
3333 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3334 | { | |
3335 | struct sock *sk = sock->sk; | |
3336 | int err; | |
3337 | ||
3338 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3339 | newsock); | |
3340 | if (err < 0) | |
3341 | goto done; | |
3342 | ||
3343 | err = sock->ops->accept(sock, *newsock, flags); | |
3344 | if (err < 0) { | |
3345 | sock_release(*newsock); | |
fa8705b0 | 3346 | *newsock = NULL; |
ac5a488e SS |
3347 | goto done; |
3348 | } | |
3349 | ||
3350 | (*newsock)->ops = sock->ops; | |
1b08534e | 3351 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3352 | |
3353 | done: | |
3354 | return err; | |
3355 | } | |
c6d409cf | 3356 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3357 | |
3358 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3359 | int flags) |
ac5a488e SS |
3360 | { |
3361 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3362 | } | |
c6d409cf | 3363 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3364 | |
3365 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3366 | int *addrlen) | |
3367 | { | |
3368 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3369 | } | |
c6d409cf | 3370 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3371 | |
3372 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3373 | int *addrlen) | |
3374 | { | |
3375 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3376 | } | |
c6d409cf | 3377 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3378 | |
3379 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3380 | char *optval, int *optlen) | |
3381 | { | |
3382 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3383 | char __user *uoptval; |
3384 | int __user *uoptlen; | |
ac5a488e SS |
3385 | int err; |
3386 | ||
fb8621bb NK |
3387 | uoptval = (char __user __force *) optval; |
3388 | uoptlen = (int __user __force *) optlen; | |
3389 | ||
ac5a488e SS |
3390 | set_fs(KERNEL_DS); |
3391 | if (level == SOL_SOCKET) | |
fb8621bb | 3392 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3393 | else |
fb8621bb NK |
3394 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3395 | uoptlen); | |
ac5a488e SS |
3396 | set_fs(oldfs); |
3397 | return err; | |
3398 | } | |
c6d409cf | 3399 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3400 | |
3401 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3402 | char *optval, unsigned int optlen) |
ac5a488e SS |
3403 | { |
3404 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3405 | char __user *uoptval; |
ac5a488e SS |
3406 | int err; |
3407 | ||
fb8621bb NK |
3408 | uoptval = (char __user __force *) optval; |
3409 | ||
ac5a488e SS |
3410 | set_fs(KERNEL_DS); |
3411 | if (level == SOL_SOCKET) | |
fb8621bb | 3412 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3413 | else |
fb8621bb | 3414 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3415 | optlen); |
3416 | set_fs(oldfs); | |
3417 | return err; | |
3418 | } | |
c6d409cf | 3419 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3420 | |
3421 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3422 | size_t size, int flags) | |
3423 | { | |
f8451725 HX |
3424 | sock_update_classid(sock->sk); |
3425 | ||
ac5a488e SS |
3426 | if (sock->ops->sendpage) |
3427 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3428 | ||
3429 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3430 | } | |
c6d409cf | 3431 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3432 | |
3433 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3434 | { | |
3435 | mm_segment_t oldfs = get_fs(); | |
3436 | int err; | |
3437 | ||
3438 | set_fs(KERNEL_DS); | |
3439 | err = sock->ops->ioctl(sock, cmd, arg); | |
3440 | set_fs(oldfs); | |
3441 | ||
3442 | return err; | |
3443 | } | |
c6d409cf | 3444 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3445 | |
91cf45f0 TM |
3446 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3447 | { | |
3448 | return sock->ops->shutdown(sock, how); | |
3449 | } | |
91cf45f0 | 3450 | EXPORT_SYMBOL(kernel_sock_shutdown); |