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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 | 72 | #include <linux/if_bridge.h> |
20380731 ACM |
73 | #include <linux/if_frad.h> |
74 | #include <linux/if_vlan.h> | |
1da177e4 LT |
75 | #include <linux/init.h> |
76 | #include <linux/poll.h> | |
77 | #include <linux/cache.h> | |
78 | #include <linux/module.h> | |
79 | #include <linux/highmem.h> | |
1da177e4 LT |
80 | #include <linux/mount.h> |
81 | #include <linux/security.h> | |
82 | #include <linux/syscalls.h> | |
83 | #include <linux/compat.h> | |
84 | #include <linux/kmod.h> | |
3ec3b2fb | 85 | #include <linux/audit.h> |
d86b5e0e | 86 | #include <linux/wireless.h> |
1b8d7ae4 | 87 | #include <linux/nsproxy.h> |
1fd7317d | 88 | #include <linux/magic.h> |
5a0e3ad6 | 89 | #include <linux/slab.h> |
600e1779 | 90 | #include <linux/xattr.h> |
1da177e4 LT |
91 | |
92 | #include <asm/uaccess.h> | |
93 | #include <asm/unistd.h> | |
94 | ||
95 | #include <net/compat.h> | |
87de87d5 | 96 | #include <net/wext.h> |
f8451725 | 97 | #include <net/cls_cgroup.h> |
1da177e4 LT |
98 | |
99 | #include <net/sock.h> | |
100 | #include <linux/netfilter.h> | |
101 | ||
6b96018b AB |
102 | #include <linux/if_tun.h> |
103 | #include <linux/ipv6_route.h> | |
104 | #include <linux/route.h> | |
6b96018b AB |
105 | #include <linux/sockios.h> |
106 | #include <linux/atalk.h> | |
06021292 ET |
107 | #include <net/ll_poll.h> |
108 | ||
109 | #ifdef CONFIG_NET_LL_RX_POLL | |
110 | unsigned long sysctl_net_ll_poll __read_mostly; | |
111 | EXPORT_SYMBOL_GPL(sysctl_net_ll_poll); | |
112 | #endif | |
6b96018b | 113 | |
1da177e4 | 114 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
115 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
116 | unsigned long nr_segs, loff_t pos); | |
117 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
118 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 119 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
120 | |
121 | static int sock_close(struct inode *inode, struct file *file); | |
122 | static unsigned int sock_poll(struct file *file, | |
123 | struct poll_table_struct *wait); | |
89bddce5 | 124 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
125 | #ifdef CONFIG_COMPAT |
126 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 127 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 128 | #endif |
1da177e4 | 129 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
130 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
131 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 132 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 133 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 134 | unsigned int flags); |
1da177e4 | 135 | |
1da177e4 LT |
136 | /* |
137 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
138 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
139 | */ | |
140 | ||
da7071d7 | 141 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
142 | .owner = THIS_MODULE, |
143 | .llseek = no_llseek, | |
144 | .aio_read = sock_aio_read, | |
145 | .aio_write = sock_aio_write, | |
146 | .poll = sock_poll, | |
147 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
148 | #ifdef CONFIG_COMPAT |
149 | .compat_ioctl = compat_sock_ioctl, | |
150 | #endif | |
1da177e4 LT |
151 | .mmap = sock_mmap, |
152 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
153 | .release = sock_close, | |
154 | .fasync = sock_fasync, | |
5274f052 JA |
155 | .sendpage = sock_sendpage, |
156 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 157 | .splice_read = sock_splice_read, |
1da177e4 LT |
158 | }; |
159 | ||
160 | /* | |
161 | * The protocol list. Each protocol is registered in here. | |
162 | */ | |
163 | ||
1da177e4 | 164 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 165 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 166 | |
1da177e4 LT |
167 | /* |
168 | * Statistics counters of the socket lists | |
169 | */ | |
170 | ||
c6d409cf | 171 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
172 | |
173 | /* | |
89bddce5 SH |
174 | * Support routines. |
175 | * Move socket addresses back and forth across the kernel/user | |
176 | * divide and look after the messy bits. | |
1da177e4 LT |
177 | */ |
178 | ||
1da177e4 LT |
179 | /** |
180 | * move_addr_to_kernel - copy a socket address into kernel space | |
181 | * @uaddr: Address in user space | |
182 | * @kaddr: Address in kernel space | |
183 | * @ulen: Length in user space | |
184 | * | |
185 | * The address is copied into kernel space. If the provided address is | |
186 | * too long an error code of -EINVAL is returned. If the copy gives | |
187 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
188 | */ | |
189 | ||
43db362d | 190 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 191 | { |
230b1839 | 192 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 193 | return -EINVAL; |
89bddce5 | 194 | if (ulen == 0) |
1da177e4 | 195 | return 0; |
89bddce5 | 196 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 197 | return -EFAULT; |
3ec3b2fb | 198 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
199 | } |
200 | ||
201 | /** | |
202 | * move_addr_to_user - copy an address to user space | |
203 | * @kaddr: kernel space address | |
204 | * @klen: length of address in kernel | |
205 | * @uaddr: user space address | |
206 | * @ulen: pointer to user length field | |
207 | * | |
208 | * The value pointed to by ulen on entry is the buffer length available. | |
209 | * This is overwritten with the buffer space used. -EINVAL is returned | |
210 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
211 | * is returned if either the buffer or the length field are not | |
212 | * accessible. | |
213 | * After copying the data up to the limit the user specifies, the true | |
214 | * length of the data is written over the length limit the user | |
215 | * specified. Zero is returned for a success. | |
216 | */ | |
89bddce5 | 217 | |
43db362d | 218 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 219 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
220 | { |
221 | int err; | |
222 | int len; | |
223 | ||
89bddce5 SH |
224 | err = get_user(len, ulen); |
225 | if (err) | |
1da177e4 | 226 | return err; |
89bddce5 SH |
227 | if (len > klen) |
228 | len = klen; | |
230b1839 | 229 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 230 | return -EINVAL; |
89bddce5 | 231 | if (len) { |
d6fe3945 SG |
232 | if (audit_sockaddr(klen, kaddr)) |
233 | return -ENOMEM; | |
89bddce5 | 234 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
235 | return -EFAULT; |
236 | } | |
237 | /* | |
89bddce5 SH |
238 | * "fromlen shall refer to the value before truncation.." |
239 | * 1003.1g | |
1da177e4 LT |
240 | */ |
241 | return __put_user(klen, ulen); | |
242 | } | |
243 | ||
e18b890b | 244 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
245 | |
246 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
247 | { | |
248 | struct socket_alloc *ei; | |
eaefd110 | 249 | struct socket_wq *wq; |
89bddce5 | 250 | |
e94b1766 | 251 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
252 | if (!ei) |
253 | return NULL; | |
eaefd110 ED |
254 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
255 | if (!wq) { | |
43815482 ED |
256 | kmem_cache_free(sock_inode_cachep, ei); |
257 | return NULL; | |
258 | } | |
eaefd110 ED |
259 | init_waitqueue_head(&wq->wait); |
260 | wq->fasync_list = NULL; | |
261 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 262 | |
1da177e4 LT |
263 | ei->socket.state = SS_UNCONNECTED; |
264 | ei->socket.flags = 0; | |
265 | ei->socket.ops = NULL; | |
266 | ei->socket.sk = NULL; | |
267 | ei->socket.file = NULL; | |
1da177e4 LT |
268 | |
269 | return &ei->vfs_inode; | |
270 | } | |
271 | ||
272 | static void sock_destroy_inode(struct inode *inode) | |
273 | { | |
43815482 | 274 | struct socket_alloc *ei; |
eaefd110 | 275 | struct socket_wq *wq; |
43815482 ED |
276 | |
277 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 278 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 279 | kfree_rcu(wq, rcu); |
43815482 | 280 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
281 | } |
282 | ||
51cc5068 | 283 | static void init_once(void *foo) |
1da177e4 | 284 | { |
89bddce5 | 285 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 286 | |
a35afb83 | 287 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 288 | } |
89bddce5 | 289 | |
1da177e4 LT |
290 | static int init_inodecache(void) |
291 | { | |
292 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
293 | sizeof(struct socket_alloc), |
294 | 0, | |
295 | (SLAB_HWCACHE_ALIGN | | |
296 | SLAB_RECLAIM_ACCOUNT | | |
297 | SLAB_MEM_SPREAD), | |
20c2df83 | 298 | init_once); |
1da177e4 LT |
299 | if (sock_inode_cachep == NULL) |
300 | return -ENOMEM; | |
301 | return 0; | |
302 | } | |
303 | ||
b87221de | 304 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
305 | .alloc_inode = sock_alloc_inode, |
306 | .destroy_inode = sock_destroy_inode, | |
307 | .statfs = simple_statfs, | |
1da177e4 LT |
308 | }; |
309 | ||
c23fbb6b ED |
310 | /* |
311 | * sockfs_dname() is called from d_path(). | |
312 | */ | |
313 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
314 | { | |
315 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
316 | dentry->d_inode->i_ino); | |
317 | } | |
318 | ||
3ba13d17 | 319 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 320 | .d_dname = sockfs_dname, |
1da177e4 LT |
321 | }; |
322 | ||
c74a1cbb AV |
323 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
324 | int flags, const char *dev_name, void *data) | |
325 | { | |
326 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
327 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
328 | } | |
329 | ||
330 | static struct vfsmount *sock_mnt __read_mostly; | |
331 | ||
332 | static struct file_system_type sock_fs_type = { | |
333 | .name = "sockfs", | |
334 | .mount = sockfs_mount, | |
335 | .kill_sb = kill_anon_super, | |
336 | }; | |
337 | ||
1da177e4 LT |
338 | /* |
339 | * Obtains the first available file descriptor and sets it up for use. | |
340 | * | |
39d8c1b6 DM |
341 | * These functions create file structures and maps them to fd space |
342 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
343 | * and file struct implicitly stored in sock->file. |
344 | * Note that another thread may close file descriptor before we return | |
345 | * from this function. We use the fact that now we do not refer | |
346 | * to socket after mapping. If one day we will need it, this | |
347 | * function will increment ref. count on file by 1. | |
348 | * | |
349 | * In any case returned fd MAY BE not valid! | |
350 | * This race condition is unavoidable | |
351 | * with shared fd spaces, we cannot solve it inside kernel, | |
352 | * but we take care of internal coherence yet. | |
353 | */ | |
354 | ||
aab174f0 | 355 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 356 | { |
7cbe66b6 | 357 | struct qstr name = { .name = "" }; |
2c48b9c4 | 358 | struct path path; |
7cbe66b6 | 359 | struct file *file; |
1da177e4 | 360 | |
600e1779 MY |
361 | if (dname) { |
362 | name.name = dname; | |
363 | name.len = strlen(name.name); | |
364 | } else if (sock->sk) { | |
365 | name.name = sock->sk->sk_prot_creator->name; | |
366 | name.len = strlen(name.name); | |
367 | } | |
4b936885 | 368 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
369 | if (unlikely(!path.dentry)) |
370 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 371 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 372 | |
2c48b9c4 | 373 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 374 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 375 | |
2c48b9c4 | 376 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 377 | &socket_file_ops); |
39b65252 | 378 | if (unlikely(IS_ERR(file))) { |
cc3808f8 | 379 | /* drop dentry, keep inode */ |
7de9c6ee | 380 | ihold(path.dentry->d_inode); |
2c48b9c4 | 381 | path_put(&path); |
39b65252 | 382 | return file; |
cc3808f8 AV |
383 | } |
384 | ||
385 | sock->file = file; | |
77d27200 | 386 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 387 | file->private_data = sock; |
28407630 | 388 | return file; |
39d8c1b6 | 389 | } |
56b31d1c | 390 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 391 | |
56b31d1c | 392 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
393 | { |
394 | struct file *newfile; | |
28407630 AV |
395 | int fd = get_unused_fd_flags(flags); |
396 | if (unlikely(fd < 0)) | |
397 | return fd; | |
39d8c1b6 | 398 | |
aab174f0 | 399 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 400 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 401 | fd_install(fd, newfile); |
28407630 AV |
402 | return fd; |
403 | } | |
7cbe66b6 | 404 | |
28407630 AV |
405 | put_unused_fd(fd); |
406 | return PTR_ERR(newfile); | |
1da177e4 LT |
407 | } |
408 | ||
406a3c63 | 409 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 410 | { |
6cb153ca BL |
411 | if (file->f_op == &socket_file_ops) |
412 | return file->private_data; /* set in sock_map_fd */ | |
413 | ||
23bb80d2 ED |
414 | *err = -ENOTSOCK; |
415 | return NULL; | |
6cb153ca | 416 | } |
406a3c63 | 417 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 418 | |
1da177e4 | 419 | /** |
c6d409cf | 420 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
421 | * @fd: file handle |
422 | * @err: pointer to an error code return | |
423 | * | |
424 | * The file handle passed in is locked and the socket it is bound | |
425 | * too is returned. If an error occurs the err pointer is overwritten | |
426 | * with a negative errno code and NULL is returned. The function checks | |
427 | * for both invalid handles and passing a handle which is not a socket. | |
428 | * | |
429 | * On a success the socket object pointer is returned. | |
430 | */ | |
431 | ||
432 | struct socket *sockfd_lookup(int fd, int *err) | |
433 | { | |
434 | struct file *file; | |
1da177e4 LT |
435 | struct socket *sock; |
436 | ||
89bddce5 SH |
437 | file = fget(fd); |
438 | if (!file) { | |
1da177e4 LT |
439 | *err = -EBADF; |
440 | return NULL; | |
441 | } | |
89bddce5 | 442 | |
6cb153ca BL |
443 | sock = sock_from_file(file, err); |
444 | if (!sock) | |
1da177e4 | 445 | fput(file); |
6cb153ca BL |
446 | return sock; |
447 | } | |
c6d409cf | 448 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 449 | |
6cb153ca BL |
450 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
451 | { | |
452 | struct file *file; | |
453 | struct socket *sock; | |
454 | ||
3672558c | 455 | *err = -EBADF; |
6cb153ca BL |
456 | file = fget_light(fd, fput_needed); |
457 | if (file) { | |
458 | sock = sock_from_file(file, err); | |
459 | if (sock) | |
460 | return sock; | |
461 | fput_light(file, *fput_needed); | |
1da177e4 | 462 | } |
6cb153ca | 463 | return NULL; |
1da177e4 LT |
464 | } |
465 | ||
600e1779 MY |
466 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
467 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
468 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
469 | static ssize_t sockfs_getxattr(struct dentry *dentry, | |
470 | const char *name, void *value, size_t size) | |
471 | { | |
472 | const char *proto_name; | |
473 | size_t proto_size; | |
474 | int error; | |
475 | ||
476 | error = -ENODATA; | |
477 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { | |
478 | proto_name = dentry->d_name.name; | |
479 | proto_size = strlen(proto_name); | |
480 | ||
481 | if (value) { | |
482 | error = -ERANGE; | |
483 | if (proto_size + 1 > size) | |
484 | goto out; | |
485 | ||
486 | strncpy(value, proto_name, proto_size + 1); | |
487 | } | |
488 | error = proto_size + 1; | |
489 | } | |
490 | ||
491 | out: | |
492 | return error; | |
493 | } | |
494 | ||
495 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, | |
496 | size_t size) | |
497 | { | |
498 | ssize_t len; | |
499 | ssize_t used = 0; | |
500 | ||
501 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); | |
502 | if (len < 0) | |
503 | return len; | |
504 | used += len; | |
505 | if (buffer) { | |
506 | if (size < used) | |
507 | return -ERANGE; | |
508 | buffer += len; | |
509 | } | |
510 | ||
511 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
512 | used += len; | |
513 | if (buffer) { | |
514 | if (size < used) | |
515 | return -ERANGE; | |
516 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
517 | buffer += len; | |
518 | } | |
519 | ||
520 | return used; | |
521 | } | |
522 | ||
523 | static const struct inode_operations sockfs_inode_ops = { | |
524 | .getxattr = sockfs_getxattr, | |
525 | .listxattr = sockfs_listxattr, | |
526 | }; | |
527 | ||
1da177e4 LT |
528 | /** |
529 | * sock_alloc - allocate a socket | |
89bddce5 | 530 | * |
1da177e4 LT |
531 | * Allocate a new inode and socket object. The two are bound together |
532 | * and initialised. The socket is then returned. If we are out of inodes | |
533 | * NULL is returned. | |
534 | */ | |
535 | ||
536 | static struct socket *sock_alloc(void) | |
537 | { | |
89bddce5 SH |
538 | struct inode *inode; |
539 | struct socket *sock; | |
1da177e4 | 540 | |
a209dfc7 | 541 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
542 | if (!inode) |
543 | return NULL; | |
544 | ||
545 | sock = SOCKET_I(inode); | |
546 | ||
29a020d3 | 547 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 548 | inode->i_ino = get_next_ino(); |
89bddce5 | 549 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
550 | inode->i_uid = current_fsuid(); |
551 | inode->i_gid = current_fsgid(); | |
600e1779 | 552 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 553 | |
19e8d69c | 554 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
555 | return sock; |
556 | } | |
557 | ||
558 | /* | |
559 | * In theory you can't get an open on this inode, but /proc provides | |
560 | * a back door. Remember to keep it shut otherwise you'll let the | |
561 | * creepy crawlies in. | |
562 | */ | |
89bddce5 | 563 | |
1da177e4 LT |
564 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
565 | { | |
566 | return -ENXIO; | |
567 | } | |
568 | ||
4b6f5d20 | 569 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
570 | .owner = THIS_MODULE, |
571 | .open = sock_no_open, | |
6038f373 | 572 | .llseek = noop_llseek, |
1da177e4 LT |
573 | }; |
574 | ||
575 | /** | |
576 | * sock_release - close a socket | |
577 | * @sock: socket to close | |
578 | * | |
579 | * The socket is released from the protocol stack if it has a release | |
580 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 581 | * an inode not a file. |
1da177e4 | 582 | */ |
89bddce5 | 583 | |
1da177e4 LT |
584 | void sock_release(struct socket *sock) |
585 | { | |
586 | if (sock->ops) { | |
587 | struct module *owner = sock->ops->owner; | |
588 | ||
589 | sock->ops->release(sock); | |
590 | sock->ops = NULL; | |
591 | module_put(owner); | |
592 | } | |
593 | ||
eaefd110 | 594 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
1da177e4 LT |
595 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
596 | ||
b09e786b MP |
597 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
598 | return; | |
599 | ||
19e8d69c | 600 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
601 | if (!sock->file) { |
602 | iput(SOCK_INODE(sock)); | |
603 | return; | |
604 | } | |
89bddce5 | 605 | sock->file = NULL; |
1da177e4 | 606 | } |
c6d409cf | 607 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 608 | |
bf84a010 | 609 | void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 610 | { |
2244d07b | 611 | *tx_flags = 0; |
20d49473 | 612 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 613 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 614 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 615 | *tx_flags |= SKBTX_SW_TSTAMP; |
6e3e939f JB |
616 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
617 | *tx_flags |= SKBTX_WIFI_STATUS; | |
20d49473 PO |
618 | } |
619 | EXPORT_SYMBOL(sock_tx_timestamp); | |
620 | ||
228e548e AB |
621 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
622 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
623 | { |
624 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 LT |
625 | |
626 | si->sock = sock; | |
627 | si->scm = NULL; | |
628 | si->msg = msg; | |
629 | si->size = size; | |
630 | ||
1da177e4 LT |
631 | return sock->ops->sendmsg(iocb, sock, msg, size); |
632 | } | |
633 | ||
228e548e AB |
634 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
635 | struct msghdr *msg, size_t size) | |
636 | { | |
637 | int err = security_socket_sendmsg(sock, msg, size); | |
638 | ||
639 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
640 | } | |
641 | ||
1da177e4 LT |
642 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
643 | { | |
644 | struct kiocb iocb; | |
645 | struct sock_iocb siocb; | |
646 | int ret; | |
647 | ||
648 | init_sync_kiocb(&iocb, NULL); | |
649 | iocb.private = &siocb; | |
650 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
651 | if (-EIOCBQUEUED == ret) | |
652 | ret = wait_on_sync_kiocb(&iocb); | |
653 | return ret; | |
654 | } | |
c6d409cf | 655 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 656 | |
894dc24c | 657 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
658 | { |
659 | struct kiocb iocb; | |
660 | struct sock_iocb siocb; | |
661 | int ret; | |
662 | ||
663 | init_sync_kiocb(&iocb, NULL); | |
664 | iocb.private = &siocb; | |
665 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
666 | if (-EIOCBQUEUED == ret) | |
667 | ret = wait_on_sync_kiocb(&iocb); | |
668 | return ret; | |
669 | } | |
670 | ||
1da177e4 LT |
671 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
672 | struct kvec *vec, size_t num, size_t size) | |
673 | { | |
674 | mm_segment_t oldfs = get_fs(); | |
675 | int result; | |
676 | ||
677 | set_fs(KERNEL_DS); | |
678 | /* | |
679 | * the following is safe, since for compiler definitions of kvec and | |
680 | * iovec are identical, yielding the same in-core layout and alignment | |
681 | */ | |
89bddce5 | 682 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
683 | msg->msg_iovlen = num; |
684 | result = sock_sendmsg(sock, msg, size); | |
685 | set_fs(oldfs); | |
686 | return result; | |
687 | } | |
c6d409cf | 688 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 689 | |
92f37fd2 ED |
690 | /* |
691 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
692 | */ | |
693 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
694 | struct sk_buff *skb) | |
695 | { | |
20d49473 PO |
696 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
697 | struct timespec ts[3]; | |
698 | int empty = 1; | |
699 | struct skb_shared_hwtstamps *shhwtstamps = | |
700 | skb_hwtstamps(skb); | |
701 | ||
702 | /* Race occurred between timestamp enabling and packet | |
703 | receiving. Fill in the current time for now. */ | |
704 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
705 | __net_timestamp(skb); | |
706 | ||
707 | if (need_software_tstamp) { | |
708 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
709 | struct timeval tv; | |
710 | skb_get_timestamp(skb, &tv); | |
711 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
712 | sizeof(tv), &tv); | |
713 | } else { | |
842509b8 | 714 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 715 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 716 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
717 | } |
718 | } | |
719 | ||
720 | ||
721 | memset(ts, 0, sizeof(ts)); | |
6e94d1ef DB |
722 | if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) && |
723 | ktime_to_timespec_cond(skb->tstamp, ts + 0)) | |
20d49473 | 724 | empty = 0; |
20d49473 PO |
725 | if (shhwtstamps) { |
726 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
6e94d1ef | 727 | ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1)) |
20d49473 PO |
728 | empty = 0; |
729 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
6e94d1ef | 730 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) |
20d49473 | 731 | empty = 0; |
92f37fd2 | 732 | } |
20d49473 PO |
733 | if (!empty) |
734 | put_cmsg(msg, SOL_SOCKET, | |
735 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 736 | } |
7c81fd8b ACM |
737 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
738 | ||
6e3e939f JB |
739 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
740 | struct sk_buff *skb) | |
741 | { | |
742 | int ack; | |
743 | ||
744 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
745 | return; | |
746 | if (!skb->wifi_acked_valid) | |
747 | return; | |
748 | ||
749 | ack = skb->wifi_acked; | |
750 | ||
751 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
752 | } | |
753 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
754 | ||
11165f14 | 755 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
756 | struct sk_buff *skb) | |
3b885787 NH |
757 | { |
758 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
759 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
760 | sizeof(__u32), &skb->dropcount); | |
761 | } | |
762 | ||
767dd033 | 763 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
764 | struct sk_buff *skb) |
765 | { | |
766 | sock_recv_timestamp(msg, sk, skb); | |
767 | sock_recv_drops(msg, sk, skb); | |
768 | } | |
767dd033 | 769 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 770 | |
a2e27255 ACM |
771 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
772 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 773 | { |
1da177e4 LT |
774 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
775 | ||
776 | si->sock = sock; | |
777 | si->scm = NULL; | |
778 | si->msg = msg; | |
779 | si->size = size; | |
780 | si->flags = flags; | |
781 | ||
1da177e4 LT |
782 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
783 | } | |
784 | ||
a2e27255 ACM |
785 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
786 | struct msghdr *msg, size_t size, int flags) | |
787 | { | |
788 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
789 | ||
790 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
791 | } | |
792 | ||
89bddce5 | 793 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
794 | size_t size, int flags) |
795 | { | |
796 | struct kiocb iocb; | |
797 | struct sock_iocb siocb; | |
798 | int ret; | |
799 | ||
89bddce5 | 800 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
801 | iocb.private = &siocb; |
802 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
803 | if (-EIOCBQUEUED == ret) | |
804 | ret = wait_on_sync_kiocb(&iocb); | |
805 | return ret; | |
806 | } | |
c6d409cf | 807 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 808 | |
a2e27255 ACM |
809 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
810 | size_t size, int flags) | |
811 | { | |
812 | struct kiocb iocb; | |
813 | struct sock_iocb siocb; | |
814 | int ret; | |
815 | ||
816 | init_sync_kiocb(&iocb, NULL); | |
817 | iocb.private = &siocb; | |
818 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
819 | if (-EIOCBQUEUED == ret) | |
820 | ret = wait_on_sync_kiocb(&iocb); | |
821 | return ret; | |
822 | } | |
823 | ||
c1249c0a ML |
824 | /** |
825 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
826 | * @sock: The socket to receive the message from | |
827 | * @msg: Received message | |
828 | * @vec: Input s/g array for message data | |
829 | * @num: Size of input s/g array | |
830 | * @size: Number of bytes to read | |
831 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
832 | * | |
833 | * On return the msg structure contains the scatter/gather array passed in the | |
834 | * vec argument. The array is modified so that it consists of the unfilled | |
835 | * portion of the original array. | |
836 | * | |
837 | * The returned value is the total number of bytes received, or an error. | |
838 | */ | |
89bddce5 SH |
839 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
840 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
841 | { |
842 | mm_segment_t oldfs = get_fs(); | |
843 | int result; | |
844 | ||
845 | set_fs(KERNEL_DS); | |
846 | /* | |
847 | * the following is safe, since for compiler definitions of kvec and | |
848 | * iovec are identical, yielding the same in-core layout and alignment | |
849 | */ | |
89bddce5 | 850 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
851 | result = sock_recvmsg(sock, msg, size, flags); |
852 | set_fs(oldfs); | |
853 | return result; | |
854 | } | |
c6d409cf | 855 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 LT |
856 | |
857 | static void sock_aio_dtor(struct kiocb *iocb) | |
858 | { | |
859 | kfree(iocb->private); | |
860 | } | |
861 | ||
ce1d4d3e CH |
862 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
863 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 864 | { |
1da177e4 LT |
865 | struct socket *sock; |
866 | int flags; | |
867 | ||
ce1d4d3e CH |
868 | sock = file->private_data; |
869 | ||
35f9c09f ED |
870 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
871 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
872 | flags |= more; | |
ce1d4d3e | 873 | |
e6949583 | 874 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 875 | } |
1da177e4 | 876 | |
9c55e01c | 877 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 878 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
879 | unsigned int flags) |
880 | { | |
881 | struct socket *sock = file->private_data; | |
882 | ||
997b37da RDC |
883 | if (unlikely(!sock->ops->splice_read)) |
884 | return -EINVAL; | |
885 | ||
9c55e01c JA |
886 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
887 | } | |
888 | ||
ce1d4d3e | 889 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 890 | struct sock_iocb *siocb) |
ce1d4d3e CH |
891 | { |
892 | if (!is_sync_kiocb(iocb)) { | |
893 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
894 | if (!siocb) | |
895 | return NULL; | |
1da177e4 LT |
896 | iocb->ki_dtor = sock_aio_dtor; |
897 | } | |
1da177e4 | 898 | |
ce1d4d3e | 899 | siocb->kiocb = iocb; |
ce1d4d3e CH |
900 | iocb->private = siocb; |
901 | return siocb; | |
1da177e4 LT |
902 | } |
903 | ||
ce1d4d3e | 904 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
905 | struct file *file, const struct iovec *iov, |
906 | unsigned long nr_segs) | |
ce1d4d3e CH |
907 | { |
908 | struct socket *sock = file->private_data; | |
909 | size_t size = 0; | |
910 | int i; | |
1da177e4 | 911 | |
89bddce5 SH |
912 | for (i = 0; i < nr_segs; i++) |
913 | size += iov[i].iov_len; | |
1da177e4 | 914 | |
ce1d4d3e CH |
915 | msg->msg_name = NULL; |
916 | msg->msg_namelen = 0; | |
917 | msg->msg_control = NULL; | |
918 | msg->msg_controllen = 0; | |
89bddce5 | 919 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
920 | msg->msg_iovlen = nr_segs; |
921 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
922 | ||
923 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
924 | } | |
925 | ||
027445c3 BP |
926 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
927 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
928 | { |
929 | struct sock_iocb siocb, *x; | |
930 | ||
1da177e4 LT |
931 | if (pos != 0) |
932 | return -ESPIPE; | |
027445c3 BP |
933 | |
934 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
935 | return 0; |
936 | ||
027445c3 BP |
937 | |
938 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
939 | if (!x) |
940 | return -ENOMEM; | |
027445c3 | 941 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
942 | } |
943 | ||
ce1d4d3e | 944 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
945 | struct file *file, const struct iovec *iov, |
946 | unsigned long nr_segs) | |
1da177e4 | 947 | { |
ce1d4d3e CH |
948 | struct socket *sock = file->private_data; |
949 | size_t size = 0; | |
950 | int i; | |
1da177e4 | 951 | |
89bddce5 SH |
952 | for (i = 0; i < nr_segs; i++) |
953 | size += iov[i].iov_len; | |
1da177e4 | 954 | |
ce1d4d3e CH |
955 | msg->msg_name = NULL; |
956 | msg->msg_namelen = 0; | |
957 | msg->msg_control = NULL; | |
958 | msg->msg_controllen = 0; | |
89bddce5 | 959 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
960 | msg->msg_iovlen = nr_segs; |
961 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
962 | if (sock->type == SOCK_SEQPACKET) | |
963 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 964 | |
ce1d4d3e | 965 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
966 | } |
967 | ||
027445c3 BP |
968 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
969 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
970 | { |
971 | struct sock_iocb siocb, *x; | |
1da177e4 | 972 | |
ce1d4d3e CH |
973 | if (pos != 0) |
974 | return -ESPIPE; | |
027445c3 | 975 | |
027445c3 | 976 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
977 | if (!x) |
978 | return -ENOMEM; | |
1da177e4 | 979 | |
027445c3 | 980 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
981 | } |
982 | ||
1da177e4 LT |
983 | /* |
984 | * Atomic setting of ioctl hooks to avoid race | |
985 | * with module unload. | |
986 | */ | |
987 | ||
4a3e2f71 | 988 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 989 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 990 | |
881d966b | 991 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 992 | { |
4a3e2f71 | 993 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 994 | br_ioctl_hook = hook; |
4a3e2f71 | 995 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
996 | } |
997 | EXPORT_SYMBOL(brioctl_set); | |
998 | ||
4a3e2f71 | 999 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 1000 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 1001 | |
881d966b | 1002 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 1003 | { |
4a3e2f71 | 1004 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1005 | vlan_ioctl_hook = hook; |
4a3e2f71 | 1006 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
1007 | } |
1008 | EXPORT_SYMBOL(vlan_ioctl_set); | |
1009 | ||
4a3e2f71 | 1010 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 1011 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 1012 | |
89bddce5 | 1013 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 1014 | { |
4a3e2f71 | 1015 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 1016 | dlci_ioctl_hook = hook; |
4a3e2f71 | 1017 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1018 | } |
1019 | EXPORT_SYMBOL(dlci_ioctl_set); | |
1020 | ||
6b96018b AB |
1021 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
1022 | unsigned int cmd, unsigned long arg) | |
1023 | { | |
1024 | int err; | |
1025 | void __user *argp = (void __user *)arg; | |
1026 | ||
1027 | err = sock->ops->ioctl(sock, cmd, arg); | |
1028 | ||
1029 | /* | |
1030 | * If this ioctl is unknown try to hand it down | |
1031 | * to the NIC driver. | |
1032 | */ | |
1033 | if (err == -ENOIOCTLCMD) | |
1034 | err = dev_ioctl(net, cmd, argp); | |
1035 | ||
1036 | return err; | |
1037 | } | |
1038 | ||
1da177e4 LT |
1039 | /* |
1040 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1041 | * what to do with it - that's up to the protocol still. | |
1042 | */ | |
1043 | ||
1044 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1045 | { | |
1046 | struct socket *sock; | |
881d966b | 1047 | struct sock *sk; |
1da177e4 LT |
1048 | void __user *argp = (void __user *)arg; |
1049 | int pid, err; | |
881d966b | 1050 | struct net *net; |
1da177e4 | 1051 | |
b69aee04 | 1052 | sock = file->private_data; |
881d966b | 1053 | sk = sock->sk; |
3b1e0a65 | 1054 | net = sock_net(sk); |
1da177e4 | 1055 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1056 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1057 | } else |
3d23e349 | 1058 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1059 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1060 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1061 | } else |
3d23e349 | 1062 | #endif |
89bddce5 | 1063 | switch (cmd) { |
1da177e4 LT |
1064 | case FIOSETOWN: |
1065 | case SIOCSPGRP: | |
1066 | err = -EFAULT; | |
1067 | if (get_user(pid, (int __user *)argp)) | |
1068 | break; | |
1069 | err = f_setown(sock->file, pid, 1); | |
1070 | break; | |
1071 | case FIOGETOWN: | |
1072 | case SIOCGPGRP: | |
609d7fa9 | 1073 | err = put_user(f_getown(sock->file), |
89bddce5 | 1074 | (int __user *)argp); |
1da177e4 LT |
1075 | break; |
1076 | case SIOCGIFBR: | |
1077 | case SIOCSIFBR: | |
1078 | case SIOCBRADDBR: | |
1079 | case SIOCBRDELBR: | |
1080 | err = -ENOPKG; | |
1081 | if (!br_ioctl_hook) | |
1082 | request_module("bridge"); | |
1083 | ||
4a3e2f71 | 1084 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1085 | if (br_ioctl_hook) |
881d966b | 1086 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1087 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1088 | break; |
1089 | case SIOCGIFVLAN: | |
1090 | case SIOCSIFVLAN: | |
1091 | err = -ENOPKG; | |
1092 | if (!vlan_ioctl_hook) | |
1093 | request_module("8021q"); | |
1094 | ||
4a3e2f71 | 1095 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1096 | if (vlan_ioctl_hook) |
881d966b | 1097 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1098 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1099 | break; |
1da177e4 LT |
1100 | case SIOCADDDLCI: |
1101 | case SIOCDELDLCI: | |
1102 | err = -ENOPKG; | |
1103 | if (!dlci_ioctl_hook) | |
1104 | request_module("dlci"); | |
1105 | ||
7512cbf6 PE |
1106 | mutex_lock(&dlci_ioctl_mutex); |
1107 | if (dlci_ioctl_hook) | |
1da177e4 | 1108 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1109 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1110 | break; |
1111 | default: | |
6b96018b | 1112 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1113 | break; |
89bddce5 | 1114 | } |
1da177e4 LT |
1115 | return err; |
1116 | } | |
1117 | ||
1118 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1119 | { | |
1120 | int err; | |
1121 | struct socket *sock = NULL; | |
89bddce5 | 1122 | |
1da177e4 LT |
1123 | err = security_socket_create(family, type, protocol, 1); |
1124 | if (err) | |
1125 | goto out; | |
1126 | ||
1127 | sock = sock_alloc(); | |
1128 | if (!sock) { | |
1129 | err = -ENOMEM; | |
1130 | goto out; | |
1131 | } | |
1132 | ||
1da177e4 | 1133 | sock->type = type; |
7420ed23 VY |
1134 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1135 | if (err) | |
1136 | goto out_release; | |
1137 | ||
1da177e4 LT |
1138 | out: |
1139 | *res = sock; | |
1140 | return err; | |
7420ed23 VY |
1141 | out_release: |
1142 | sock_release(sock); | |
1143 | sock = NULL; | |
1144 | goto out; | |
1da177e4 | 1145 | } |
c6d409cf | 1146 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1147 | |
1148 | /* No kernel lock held - perfect */ | |
89bddce5 | 1149 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1150 | { |
1151 | struct socket *sock; | |
1152 | ||
1153 | /* | |
89bddce5 | 1154 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1155 | */ |
b69aee04 | 1156 | sock = file->private_data; |
1da177e4 LT |
1157 | return sock->ops->poll(file, sock, wait); |
1158 | } | |
1159 | ||
89bddce5 | 1160 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1161 | { |
b69aee04 | 1162 | struct socket *sock = file->private_data; |
1da177e4 LT |
1163 | |
1164 | return sock->ops->mmap(file, sock, vma); | |
1165 | } | |
1166 | ||
20380731 | 1167 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1168 | { |
1da177e4 LT |
1169 | sock_release(SOCKET_I(inode)); |
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | /* | |
1174 | * Update the socket async list | |
1175 | * | |
1176 | * Fasync_list locking strategy. | |
1177 | * | |
1178 | * 1. fasync_list is modified only under process context socket lock | |
1179 | * i.e. under semaphore. | |
1180 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1181 | * or under socket lock |
1da177e4 LT |
1182 | */ |
1183 | ||
1184 | static int sock_fasync(int fd, struct file *filp, int on) | |
1185 | { | |
989a2979 ED |
1186 | struct socket *sock = filp->private_data; |
1187 | struct sock *sk = sock->sk; | |
eaefd110 | 1188 | struct socket_wq *wq; |
1da177e4 | 1189 | |
989a2979 | 1190 | if (sk == NULL) |
1da177e4 | 1191 | return -EINVAL; |
1da177e4 LT |
1192 | |
1193 | lock_sock(sk); | |
eaefd110 ED |
1194 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1195 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1196 | |
eaefd110 | 1197 | if (!wq->fasync_list) |
989a2979 ED |
1198 | sock_reset_flag(sk, SOCK_FASYNC); |
1199 | else | |
bcdce719 | 1200 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1201 | |
989a2979 | 1202 | release_sock(sk); |
1da177e4 LT |
1203 | return 0; |
1204 | } | |
1205 | ||
43815482 | 1206 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1207 | |
1208 | int sock_wake_async(struct socket *sock, int how, int band) | |
1209 | { | |
43815482 ED |
1210 | struct socket_wq *wq; |
1211 | ||
1212 | if (!sock) | |
1213 | return -1; | |
1214 | rcu_read_lock(); | |
1215 | wq = rcu_dereference(sock->wq); | |
1216 | if (!wq || !wq->fasync_list) { | |
1217 | rcu_read_unlock(); | |
1da177e4 | 1218 | return -1; |
43815482 | 1219 | } |
89bddce5 | 1220 | switch (how) { |
8d8ad9d7 | 1221 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1222 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1223 | break; | |
1224 | goto call_kill; | |
8d8ad9d7 | 1225 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1226 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1227 | break; | |
1228 | /* fall through */ | |
8d8ad9d7 | 1229 | case SOCK_WAKE_IO: |
89bddce5 | 1230 | call_kill: |
43815482 | 1231 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1232 | break; |
8d8ad9d7 | 1233 | case SOCK_WAKE_URG: |
43815482 | 1234 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1235 | } |
43815482 | 1236 | rcu_read_unlock(); |
1da177e4 LT |
1237 | return 0; |
1238 | } | |
c6d409cf | 1239 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1240 | |
721db93a | 1241 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1242 | struct socket **res, int kern) |
1da177e4 LT |
1243 | { |
1244 | int err; | |
1245 | struct socket *sock; | |
55737fda | 1246 | const struct net_proto_family *pf; |
1da177e4 LT |
1247 | |
1248 | /* | |
89bddce5 | 1249 | * Check protocol is in range |
1da177e4 LT |
1250 | */ |
1251 | if (family < 0 || family >= NPROTO) | |
1252 | return -EAFNOSUPPORT; | |
1253 | if (type < 0 || type >= SOCK_MAX) | |
1254 | return -EINVAL; | |
1255 | ||
1256 | /* Compatibility. | |
1257 | ||
1258 | This uglymoron is moved from INET layer to here to avoid | |
1259 | deadlock in module load. | |
1260 | */ | |
1261 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1262 | static int warned; |
1da177e4 LT |
1263 | if (!warned) { |
1264 | warned = 1; | |
89bddce5 SH |
1265 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1266 | current->comm); | |
1da177e4 LT |
1267 | } |
1268 | family = PF_PACKET; | |
1269 | } | |
1270 | ||
1271 | err = security_socket_create(family, type, protocol, kern); | |
1272 | if (err) | |
1273 | return err; | |
89bddce5 | 1274 | |
55737fda SH |
1275 | /* |
1276 | * Allocate the socket and allow the family to set things up. if | |
1277 | * the protocol is 0, the family is instructed to select an appropriate | |
1278 | * default. | |
1279 | */ | |
1280 | sock = sock_alloc(); | |
1281 | if (!sock) { | |
e87cc472 | 1282 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1283 | return -ENFILE; /* Not exactly a match, but its the |
1284 | closest posix thing */ | |
1285 | } | |
1286 | ||
1287 | sock->type = type; | |
1288 | ||
95a5afca | 1289 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1290 | /* Attempt to load a protocol module if the find failed. |
1291 | * | |
1292 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1293 | * requested real, full-featured networking support upon configuration. |
1294 | * Otherwise module support will break! | |
1295 | */ | |
190683a9 | 1296 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1297 | request_module("net-pf-%d", family); |
1da177e4 LT |
1298 | #endif |
1299 | ||
55737fda SH |
1300 | rcu_read_lock(); |
1301 | pf = rcu_dereference(net_families[family]); | |
1302 | err = -EAFNOSUPPORT; | |
1303 | if (!pf) | |
1304 | goto out_release; | |
1da177e4 LT |
1305 | |
1306 | /* | |
1307 | * We will call the ->create function, that possibly is in a loadable | |
1308 | * module, so we have to bump that loadable module refcnt first. | |
1309 | */ | |
55737fda | 1310 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1311 | goto out_release; |
1312 | ||
55737fda SH |
1313 | /* Now protected by module ref count */ |
1314 | rcu_read_unlock(); | |
1315 | ||
3f378b68 | 1316 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1317 | if (err < 0) |
1da177e4 | 1318 | goto out_module_put; |
a79af59e | 1319 | |
1da177e4 LT |
1320 | /* |
1321 | * Now to bump the refcnt of the [loadable] module that owns this | |
1322 | * socket at sock_release time we decrement its refcnt. | |
1323 | */ | |
55737fda SH |
1324 | if (!try_module_get(sock->ops->owner)) |
1325 | goto out_module_busy; | |
1326 | ||
1da177e4 LT |
1327 | /* |
1328 | * Now that we're done with the ->create function, the [loadable] | |
1329 | * module can have its refcnt decremented | |
1330 | */ | |
55737fda | 1331 | module_put(pf->owner); |
7420ed23 VY |
1332 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1333 | if (err) | |
3b185525 | 1334 | goto out_sock_release; |
55737fda | 1335 | *res = sock; |
1da177e4 | 1336 | |
55737fda SH |
1337 | return 0; |
1338 | ||
1339 | out_module_busy: | |
1340 | err = -EAFNOSUPPORT; | |
1da177e4 | 1341 | out_module_put: |
55737fda SH |
1342 | sock->ops = NULL; |
1343 | module_put(pf->owner); | |
1344 | out_sock_release: | |
1da177e4 | 1345 | sock_release(sock); |
55737fda SH |
1346 | return err; |
1347 | ||
1348 | out_release: | |
1349 | rcu_read_unlock(); | |
1350 | goto out_sock_release; | |
1da177e4 | 1351 | } |
721db93a | 1352 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1353 | |
1354 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1355 | { | |
1b8d7ae4 | 1356 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1357 | } |
c6d409cf | 1358 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1359 | |
1360 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1361 | { | |
1b8d7ae4 | 1362 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1363 | } |
c6d409cf | 1364 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1365 | |
3e0fa65f | 1366 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1367 | { |
1368 | int retval; | |
1369 | struct socket *sock; | |
a677a039 UD |
1370 | int flags; |
1371 | ||
e38b36f3 UD |
1372 | /* Check the SOCK_* constants for consistency. */ |
1373 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1374 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1375 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1376 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1377 | ||
a677a039 | 1378 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1379 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1380 | return -EINVAL; |
1381 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1382 | |
aaca0bdc UD |
1383 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1384 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1385 | ||
1da177e4 LT |
1386 | retval = sock_create(family, type, protocol, &sock); |
1387 | if (retval < 0) | |
1388 | goto out; | |
1389 | ||
77d27200 | 1390 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1391 | if (retval < 0) |
1392 | goto out_release; | |
1393 | ||
1394 | out: | |
1395 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1396 | return retval; | |
1397 | ||
1398 | out_release: | |
1399 | sock_release(sock); | |
1400 | return retval; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * Create a pair of connected sockets. | |
1405 | */ | |
1406 | ||
3e0fa65f HC |
1407 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1408 | int __user *, usockvec) | |
1da177e4 LT |
1409 | { |
1410 | struct socket *sock1, *sock2; | |
1411 | int fd1, fd2, err; | |
db349509 | 1412 | struct file *newfile1, *newfile2; |
a677a039 UD |
1413 | int flags; |
1414 | ||
1415 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1416 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1417 | return -EINVAL; |
1418 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1419 | |
aaca0bdc UD |
1420 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1421 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1422 | ||
1da177e4 LT |
1423 | /* |
1424 | * Obtain the first socket and check if the underlying protocol | |
1425 | * supports the socketpair call. | |
1426 | */ | |
1427 | ||
1428 | err = sock_create(family, type, protocol, &sock1); | |
1429 | if (err < 0) | |
1430 | goto out; | |
1431 | ||
1432 | err = sock_create(family, type, protocol, &sock2); | |
1433 | if (err < 0) | |
1434 | goto out_release_1; | |
1435 | ||
1436 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1437 | if (err < 0) |
1da177e4 LT |
1438 | goto out_release_both; |
1439 | ||
28407630 | 1440 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1441 | if (unlikely(fd1 < 0)) { |
1442 | err = fd1; | |
db349509 | 1443 | goto out_release_both; |
bf3c23d1 | 1444 | } |
28407630 | 1445 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1446 | if (unlikely(fd2 < 0)) { |
1447 | err = fd2; | |
28407630 AV |
1448 | put_unused_fd(fd1); |
1449 | goto out_release_both; | |
1450 | } | |
1451 | ||
aab174f0 | 1452 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
28407630 AV |
1453 | if (unlikely(IS_ERR(newfile1))) { |
1454 | err = PTR_ERR(newfile1); | |
1455 | put_unused_fd(fd1); | |
1456 | put_unused_fd(fd2); | |
1457 | goto out_release_both; | |
1458 | } | |
1459 | ||
aab174f0 | 1460 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1461 | if (IS_ERR(newfile2)) { |
1462 | err = PTR_ERR(newfile2); | |
198de4d7 AV |
1463 | fput(newfile1); |
1464 | put_unused_fd(fd1); | |
28407630 | 1465 | put_unused_fd(fd2); |
198de4d7 AV |
1466 | sock_release(sock2); |
1467 | goto out; | |
db349509 AV |
1468 | } |
1469 | ||
157cf649 | 1470 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1471 | fd_install(fd1, newfile1); |
1472 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1473 | /* fd1 and fd2 may be already another descriptors. |
1474 | * Not kernel problem. | |
1475 | */ | |
1476 | ||
89bddce5 | 1477 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1478 | if (!err) |
1479 | err = put_user(fd2, &usockvec[1]); | |
1480 | if (!err) | |
1481 | return 0; | |
1482 | ||
1483 | sys_close(fd2); | |
1484 | sys_close(fd1); | |
1485 | return err; | |
1486 | ||
1da177e4 | 1487 | out_release_both: |
89bddce5 | 1488 | sock_release(sock2); |
1da177e4 | 1489 | out_release_1: |
89bddce5 | 1490 | sock_release(sock1); |
1da177e4 LT |
1491 | out: |
1492 | return err; | |
1493 | } | |
1494 | ||
1da177e4 LT |
1495 | /* |
1496 | * Bind a name to a socket. Nothing much to do here since it's | |
1497 | * the protocol's responsibility to handle the local address. | |
1498 | * | |
1499 | * We move the socket address to kernel space before we call | |
1500 | * the protocol layer (having also checked the address is ok). | |
1501 | */ | |
1502 | ||
20f37034 | 1503 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1504 | { |
1505 | struct socket *sock; | |
230b1839 | 1506 | struct sockaddr_storage address; |
6cb153ca | 1507 | int err, fput_needed; |
1da177e4 | 1508 | |
89bddce5 | 1509 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1510 | if (sock) { |
43db362d | 1511 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1512 | if (err >= 0) { |
1513 | err = security_socket_bind(sock, | |
230b1839 | 1514 | (struct sockaddr *)&address, |
89bddce5 | 1515 | addrlen); |
6cb153ca BL |
1516 | if (!err) |
1517 | err = sock->ops->bind(sock, | |
89bddce5 | 1518 | (struct sockaddr *) |
230b1839 | 1519 | &address, addrlen); |
1da177e4 | 1520 | } |
6cb153ca | 1521 | fput_light(sock->file, fput_needed); |
89bddce5 | 1522 | } |
1da177e4 LT |
1523 | return err; |
1524 | } | |
1525 | ||
1da177e4 LT |
1526 | /* |
1527 | * Perform a listen. Basically, we allow the protocol to do anything | |
1528 | * necessary for a listen, and if that works, we mark the socket as | |
1529 | * ready for listening. | |
1530 | */ | |
1531 | ||
3e0fa65f | 1532 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1533 | { |
1534 | struct socket *sock; | |
6cb153ca | 1535 | int err, fput_needed; |
b8e1f9b5 | 1536 | int somaxconn; |
89bddce5 SH |
1537 | |
1538 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1539 | if (sock) { | |
8efa6e93 | 1540 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1541 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1542 | backlog = somaxconn; |
1da177e4 LT |
1543 | |
1544 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1545 | if (!err) |
1546 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1547 | |
6cb153ca | 1548 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1549 | } |
1550 | return err; | |
1551 | } | |
1552 | ||
1da177e4 LT |
1553 | /* |
1554 | * For accept, we attempt to create a new socket, set up the link | |
1555 | * with the client, wake up the client, then return the new | |
1556 | * connected fd. We collect the address of the connector in kernel | |
1557 | * space and move it to user at the very end. This is unclean because | |
1558 | * we open the socket then return an error. | |
1559 | * | |
1560 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1561 | * status to recvmsg. We need to add that support in a way thats | |
1562 | * clean when we restucture accept also. | |
1563 | */ | |
1564 | ||
20f37034 HC |
1565 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1566 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1567 | { |
1568 | struct socket *sock, *newsock; | |
39d8c1b6 | 1569 | struct file *newfile; |
6cb153ca | 1570 | int err, len, newfd, fput_needed; |
230b1839 | 1571 | struct sockaddr_storage address; |
1da177e4 | 1572 | |
77d27200 | 1573 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1574 | return -EINVAL; |
1575 | ||
1576 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1577 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1578 | ||
6cb153ca | 1579 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1580 | if (!sock) |
1581 | goto out; | |
1582 | ||
1583 | err = -ENFILE; | |
c6d409cf ED |
1584 | newsock = sock_alloc(); |
1585 | if (!newsock) | |
1da177e4 LT |
1586 | goto out_put; |
1587 | ||
1588 | newsock->type = sock->type; | |
1589 | newsock->ops = sock->ops; | |
1590 | ||
1da177e4 LT |
1591 | /* |
1592 | * We don't need try_module_get here, as the listening socket (sock) | |
1593 | * has the protocol module (sock->ops->owner) held. | |
1594 | */ | |
1595 | __module_get(newsock->ops->owner); | |
1596 | ||
28407630 | 1597 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1598 | if (unlikely(newfd < 0)) { |
1599 | err = newfd; | |
9a1875e6 DM |
1600 | sock_release(newsock); |
1601 | goto out_put; | |
39d8c1b6 | 1602 | } |
aab174f0 | 1603 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
28407630 AV |
1604 | if (unlikely(IS_ERR(newfile))) { |
1605 | err = PTR_ERR(newfile); | |
1606 | put_unused_fd(newfd); | |
1607 | sock_release(newsock); | |
1608 | goto out_put; | |
1609 | } | |
39d8c1b6 | 1610 | |
a79af59e FF |
1611 | err = security_socket_accept(sock, newsock); |
1612 | if (err) | |
39d8c1b6 | 1613 | goto out_fd; |
a79af59e | 1614 | |
1da177e4 LT |
1615 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1616 | if (err < 0) | |
39d8c1b6 | 1617 | goto out_fd; |
1da177e4 LT |
1618 | |
1619 | if (upeer_sockaddr) { | |
230b1839 | 1620 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1621 | &len, 2) < 0) { |
1da177e4 | 1622 | err = -ECONNABORTED; |
39d8c1b6 | 1623 | goto out_fd; |
1da177e4 | 1624 | } |
43db362d | 1625 | err = move_addr_to_user(&address, |
230b1839 | 1626 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1627 | if (err < 0) |
39d8c1b6 | 1628 | goto out_fd; |
1da177e4 LT |
1629 | } |
1630 | ||
1631 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1632 | ||
39d8c1b6 DM |
1633 | fd_install(newfd, newfile); |
1634 | err = newfd; | |
1da177e4 | 1635 | |
1da177e4 | 1636 | out_put: |
6cb153ca | 1637 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1638 | out: |
1639 | return err; | |
39d8c1b6 | 1640 | out_fd: |
9606a216 | 1641 | fput(newfile); |
39d8c1b6 | 1642 | put_unused_fd(newfd); |
1da177e4 LT |
1643 | goto out_put; |
1644 | } | |
1645 | ||
20f37034 HC |
1646 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1647 | int __user *, upeer_addrlen) | |
aaca0bdc | 1648 | { |
de11defe | 1649 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1650 | } |
1651 | ||
1da177e4 LT |
1652 | /* |
1653 | * Attempt to connect to a socket with the server address. The address | |
1654 | * is in user space so we verify it is OK and move it to kernel space. | |
1655 | * | |
1656 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1657 | * break bindings | |
1658 | * | |
1659 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1660 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1661 | * include the -EINPROGRESS status for such sockets. | |
1662 | */ | |
1663 | ||
20f37034 HC |
1664 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1665 | int, addrlen) | |
1da177e4 LT |
1666 | { |
1667 | struct socket *sock; | |
230b1839 | 1668 | struct sockaddr_storage address; |
6cb153ca | 1669 | int err, fput_needed; |
1da177e4 | 1670 | |
6cb153ca | 1671 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1672 | if (!sock) |
1673 | goto out; | |
43db362d | 1674 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1675 | if (err < 0) |
1676 | goto out_put; | |
1677 | ||
89bddce5 | 1678 | err = |
230b1839 | 1679 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1680 | if (err) |
1681 | goto out_put; | |
1682 | ||
230b1839 | 1683 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1684 | sock->file->f_flags); |
1685 | out_put: | |
6cb153ca | 1686 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1687 | out: |
1688 | return err; | |
1689 | } | |
1690 | ||
1691 | /* | |
1692 | * Get the local address ('name') of a socket object. Move the obtained | |
1693 | * name to user space. | |
1694 | */ | |
1695 | ||
20f37034 HC |
1696 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1697 | int __user *, usockaddr_len) | |
1da177e4 LT |
1698 | { |
1699 | struct socket *sock; | |
230b1839 | 1700 | struct sockaddr_storage address; |
6cb153ca | 1701 | int len, err, fput_needed; |
89bddce5 | 1702 | |
6cb153ca | 1703 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1704 | if (!sock) |
1705 | goto out; | |
1706 | ||
1707 | err = security_socket_getsockname(sock); | |
1708 | if (err) | |
1709 | goto out_put; | |
1710 | ||
230b1839 | 1711 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1712 | if (err) |
1713 | goto out_put; | |
43db362d | 1714 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1715 | |
1716 | out_put: | |
6cb153ca | 1717 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1718 | out: |
1719 | return err; | |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | * Get the remote address ('name') of a socket object. Move the obtained | |
1724 | * name to user space. | |
1725 | */ | |
1726 | ||
20f37034 HC |
1727 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1728 | int __user *, usockaddr_len) | |
1da177e4 LT |
1729 | { |
1730 | struct socket *sock; | |
230b1839 | 1731 | struct sockaddr_storage address; |
6cb153ca | 1732 | int len, err, fput_needed; |
1da177e4 | 1733 | |
89bddce5 SH |
1734 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1735 | if (sock != NULL) { | |
1da177e4 LT |
1736 | err = security_socket_getpeername(sock); |
1737 | if (err) { | |
6cb153ca | 1738 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1739 | return err; |
1740 | } | |
1741 | ||
89bddce5 | 1742 | err = |
230b1839 | 1743 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1744 | 1); |
1da177e4 | 1745 | if (!err) |
43db362d | 1746 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1747 | usockaddr_len); |
6cb153ca | 1748 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1749 | } |
1750 | return err; | |
1751 | } | |
1752 | ||
1753 | /* | |
1754 | * Send a datagram to a given address. We move the address into kernel | |
1755 | * space and check the user space data area is readable before invoking | |
1756 | * the protocol. | |
1757 | */ | |
1758 | ||
3e0fa65f | 1759 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1760 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1761 | int, addr_len) |
1da177e4 LT |
1762 | { |
1763 | struct socket *sock; | |
230b1839 | 1764 | struct sockaddr_storage address; |
1da177e4 LT |
1765 | int err; |
1766 | struct msghdr msg; | |
1767 | struct iovec iov; | |
6cb153ca | 1768 | int fput_needed; |
6cb153ca | 1769 | |
253eacc0 LT |
1770 | if (len > INT_MAX) |
1771 | len = INT_MAX; | |
de0fa95c PE |
1772 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1773 | if (!sock) | |
4387ff75 | 1774 | goto out; |
6cb153ca | 1775 | |
89bddce5 SH |
1776 | iov.iov_base = buff; |
1777 | iov.iov_len = len; | |
1778 | msg.msg_name = NULL; | |
1779 | msg.msg_iov = &iov; | |
1780 | msg.msg_iovlen = 1; | |
1781 | msg.msg_control = NULL; | |
1782 | msg.msg_controllen = 0; | |
1783 | msg.msg_namelen = 0; | |
6cb153ca | 1784 | if (addr) { |
43db362d | 1785 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1786 | if (err < 0) |
1787 | goto out_put; | |
230b1839 | 1788 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1789 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1790 | } |
1791 | if (sock->file->f_flags & O_NONBLOCK) | |
1792 | flags |= MSG_DONTWAIT; | |
1793 | msg.msg_flags = flags; | |
1794 | err = sock_sendmsg(sock, &msg, len); | |
1795 | ||
89bddce5 | 1796 | out_put: |
de0fa95c | 1797 | fput_light(sock->file, fput_needed); |
4387ff75 | 1798 | out: |
1da177e4 LT |
1799 | return err; |
1800 | } | |
1801 | ||
1802 | /* | |
89bddce5 | 1803 | * Send a datagram down a socket. |
1da177e4 LT |
1804 | */ |
1805 | ||
3e0fa65f | 1806 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1807 | unsigned int, flags) |
1da177e4 LT |
1808 | { |
1809 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1810 | } | |
1811 | ||
1812 | /* | |
89bddce5 | 1813 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1814 | * sender. We verify the buffers are writable and if needed move the |
1815 | * sender address from kernel to user space. | |
1816 | */ | |
1817 | ||
3e0fa65f | 1818 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1819 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1820 | int __user *, addr_len) |
1da177e4 LT |
1821 | { |
1822 | struct socket *sock; | |
1823 | struct iovec iov; | |
1824 | struct msghdr msg; | |
230b1839 | 1825 | struct sockaddr_storage address; |
89bddce5 | 1826 | int err, err2; |
6cb153ca BL |
1827 | int fput_needed; |
1828 | ||
253eacc0 LT |
1829 | if (size > INT_MAX) |
1830 | size = INT_MAX; | |
de0fa95c | 1831 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1832 | if (!sock) |
de0fa95c | 1833 | goto out; |
1da177e4 | 1834 | |
89bddce5 SH |
1835 | msg.msg_control = NULL; |
1836 | msg.msg_controllen = 0; | |
1837 | msg.msg_iovlen = 1; | |
1838 | msg.msg_iov = &iov; | |
1839 | iov.iov_len = size; | |
1840 | iov.iov_base = ubuf; | |
230b1839 YH |
1841 | msg.msg_name = (struct sockaddr *)&address; |
1842 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1843 | if (sock->file->f_flags & O_NONBLOCK) |
1844 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1845 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1846 | |
89bddce5 | 1847 | if (err >= 0 && addr != NULL) { |
43db362d | 1848 | err2 = move_addr_to_user(&address, |
230b1839 | 1849 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1850 | if (err2 < 0) |
1851 | err = err2; | |
1da177e4 | 1852 | } |
de0fa95c PE |
1853 | |
1854 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1855 | out: |
1da177e4 LT |
1856 | return err; |
1857 | } | |
1858 | ||
1859 | /* | |
89bddce5 | 1860 | * Receive a datagram from a socket. |
1da177e4 LT |
1861 | */ |
1862 | ||
89bddce5 | 1863 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
95c96174 | 1864 | unsigned int flags) |
1da177e4 LT |
1865 | { |
1866 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1867 | } | |
1868 | ||
1869 | /* | |
1870 | * Set a socket option. Because we don't know the option lengths we have | |
1871 | * to pass the user mode parameter for the protocols to sort out. | |
1872 | */ | |
1873 | ||
20f37034 HC |
1874 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1875 | char __user *, optval, int, optlen) | |
1da177e4 | 1876 | { |
6cb153ca | 1877 | int err, fput_needed; |
1da177e4 LT |
1878 | struct socket *sock; |
1879 | ||
1880 | if (optlen < 0) | |
1881 | return -EINVAL; | |
89bddce5 SH |
1882 | |
1883 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1884 | if (sock != NULL) { | |
1885 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1886 | if (err) |
1887 | goto out_put; | |
1da177e4 LT |
1888 | |
1889 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1890 | err = |
1891 | sock_setsockopt(sock, level, optname, optval, | |
1892 | optlen); | |
1da177e4 | 1893 | else |
89bddce5 SH |
1894 | err = |
1895 | sock->ops->setsockopt(sock, level, optname, optval, | |
1896 | optlen); | |
6cb153ca BL |
1897 | out_put: |
1898 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1899 | } |
1900 | return err; | |
1901 | } | |
1902 | ||
1903 | /* | |
1904 | * Get a socket option. Because we don't know the option lengths we have | |
1905 | * to pass a user mode parameter for the protocols to sort out. | |
1906 | */ | |
1907 | ||
20f37034 HC |
1908 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1909 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1910 | { |
6cb153ca | 1911 | int err, fput_needed; |
1da177e4 LT |
1912 | struct socket *sock; |
1913 | ||
89bddce5 SH |
1914 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1915 | if (sock != NULL) { | |
6cb153ca BL |
1916 | err = security_socket_getsockopt(sock, level, optname); |
1917 | if (err) | |
1918 | goto out_put; | |
1da177e4 LT |
1919 | |
1920 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1921 | err = |
1922 | sock_getsockopt(sock, level, optname, optval, | |
1923 | optlen); | |
1da177e4 | 1924 | else |
89bddce5 SH |
1925 | err = |
1926 | sock->ops->getsockopt(sock, level, optname, optval, | |
1927 | optlen); | |
6cb153ca BL |
1928 | out_put: |
1929 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1930 | } |
1931 | return err; | |
1932 | } | |
1933 | ||
1da177e4 LT |
1934 | /* |
1935 | * Shutdown a socket. | |
1936 | */ | |
1937 | ||
754fe8d2 | 1938 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1939 | { |
6cb153ca | 1940 | int err, fput_needed; |
1da177e4 LT |
1941 | struct socket *sock; |
1942 | ||
89bddce5 SH |
1943 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1944 | if (sock != NULL) { | |
1da177e4 | 1945 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1946 | if (!err) |
1947 | err = sock->ops->shutdown(sock, how); | |
1948 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1949 | } |
1950 | return err; | |
1951 | } | |
1952 | ||
89bddce5 | 1953 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1954 | * fields which are the same type (int / unsigned) on our platforms. |
1955 | */ | |
1956 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1957 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1958 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1959 | ||
c71d8ebe TH |
1960 | struct used_address { |
1961 | struct sockaddr_storage name; | |
1962 | unsigned int name_len; | |
1963 | }; | |
1964 | ||
a7526eb5 | 1965 | static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 1966 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1967 | struct used_address *used_address) |
1da177e4 | 1968 | { |
89bddce5 SH |
1969 | struct compat_msghdr __user *msg_compat = |
1970 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1971 | struct sockaddr_storage address; |
1da177e4 | 1972 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1973 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1974 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1975 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 1976 | unsigned char *ctl_buf = ctl; |
a74e9106 | 1977 | int err, ctl_len, total_len; |
89bddce5 | 1978 | |
1da177e4 LT |
1979 | err = -EFAULT; |
1980 | if (MSG_CMSG_COMPAT & flags) { | |
228e548e | 1981 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1982 | return -EFAULT; |
228e548e | 1983 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
1da177e4 LT |
1984 | return -EFAULT; |
1985 | ||
228e548e | 1986 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
1987 | err = -EMSGSIZE; |
1988 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
1989 | goto out; | |
1990 | err = -ENOMEM; | |
1991 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
1992 | GFP_KERNEL); | |
1da177e4 | 1993 | if (!iov) |
228e548e | 1994 | goto out; |
1da177e4 LT |
1995 | } |
1996 | ||
1997 | /* This will also move the address data into kernel space */ | |
1998 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 1999 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 2000 | } else |
43db362d | 2001 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 2002 | if (err < 0) |
1da177e4 LT |
2003 | goto out_freeiov; |
2004 | total_len = err; | |
2005 | ||
2006 | err = -ENOBUFS; | |
2007 | ||
228e548e | 2008 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2009 | goto out_freeiov; |
228e548e | 2010 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2011 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2012 | err = |
228e548e | 2013 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2014 | sizeof(ctl)); |
1da177e4 LT |
2015 | if (err) |
2016 | goto out_freeiov; | |
228e548e AB |
2017 | ctl_buf = msg_sys->msg_control; |
2018 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2019 | } else if (ctl_len) { |
89bddce5 | 2020 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2021 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2022 | if (ctl_buf == NULL) |
1da177e4 LT |
2023 | goto out_freeiov; |
2024 | } | |
2025 | err = -EFAULT; | |
2026 | /* | |
228e548e | 2027 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2028 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2029 | * checking falls down on this. | |
2030 | */ | |
fb8621bb | 2031 | if (copy_from_user(ctl_buf, |
228e548e | 2032 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2033 | ctl_len)) |
1da177e4 | 2034 | goto out_freectl; |
228e548e | 2035 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2036 | } |
228e548e | 2037 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2038 | |
2039 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2040 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2041 | /* |
2042 | * If this is sendmmsg() and current destination address is same as | |
2043 | * previously succeeded address, omit asking LSM's decision. | |
2044 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2045 | * destination address never matches. | |
2046 | */ | |
bc909d9d MD |
2047 | if (used_address && msg_sys->msg_name && |
2048 | used_address->name_len == msg_sys->msg_namelen && | |
2049 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2050 | used_address->name_len)) { |
2051 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2052 | goto out_freectl; | |
2053 | } | |
2054 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2055 | /* | |
2056 | * If this is sendmmsg() and sending to current destination address was | |
2057 | * successful, remember it. | |
2058 | */ | |
2059 | if (used_address && err >= 0) { | |
2060 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2061 | if (msg_sys->msg_name) |
2062 | memcpy(&used_address->name, msg_sys->msg_name, | |
2063 | used_address->name_len); | |
c71d8ebe | 2064 | } |
1da177e4 LT |
2065 | |
2066 | out_freectl: | |
89bddce5 | 2067 | if (ctl_buf != ctl) |
1da177e4 LT |
2068 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2069 | out_freeiov: | |
2070 | if (iov != iovstack) | |
a74e9106 | 2071 | kfree(iov); |
228e548e AB |
2072 | out: |
2073 | return err; | |
2074 | } | |
2075 | ||
2076 | /* | |
2077 | * BSD sendmsg interface | |
2078 | */ | |
2079 | ||
a7526eb5 | 2080 | long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
228e548e AB |
2081 | { |
2082 | int fput_needed, err; | |
2083 | struct msghdr msg_sys; | |
1be374a0 AL |
2084 | struct socket *sock; |
2085 | ||
1be374a0 | 2086 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2087 | if (!sock) |
2088 | goto out; | |
2089 | ||
a7526eb5 | 2090 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2091 | |
6cb153ca | 2092 | fput_light(sock->file, fput_needed); |
89bddce5 | 2093 | out: |
1da177e4 LT |
2094 | return err; |
2095 | } | |
2096 | ||
a7526eb5 AL |
2097 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
2098 | { | |
2099 | if (flags & MSG_CMSG_COMPAT) | |
2100 | return -EINVAL; | |
2101 | return __sys_sendmsg(fd, msg, flags); | |
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 | 2133 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2134 | err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
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 { | |
a7526eb5 AL |
2141 | err = ___sys_sendmsg(sock, |
2142 | (struct msghdr __user *)entry, | |
2143 | &msg_sys, flags, &used_address); | |
228e548e AB |
2144 | if (err < 0) |
2145 | break; | |
2146 | err = put_user(err, &entry->msg_len); | |
2147 | ++entry; | |
2148 | } | |
2149 | ||
2150 | if (err) | |
2151 | break; | |
2152 | ++datagrams; | |
2153 | } | |
2154 | ||
228e548e AB |
2155 | fput_light(sock->file, fput_needed); |
2156 | ||
728ffb86 AB |
2157 | /* We only return an error if no datagrams were able to be sent */ |
2158 | if (datagrams != 0) | |
228e548e AB |
2159 | return datagrams; |
2160 | ||
228e548e AB |
2161 | return err; |
2162 | } | |
2163 | ||
2164 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2165 | unsigned int, vlen, unsigned int, flags) | |
2166 | { | |
1be374a0 AL |
2167 | if (flags & MSG_CMSG_COMPAT) |
2168 | return -EINVAL; | |
228e548e AB |
2169 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2170 | } | |
2171 | ||
a7526eb5 | 2172 | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2173 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2174 | { |
89bddce5 SH |
2175 | struct compat_msghdr __user *msg_compat = |
2176 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2177 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2178 | struct iovec *iov = iovstack; |
1da177e4 | 2179 | unsigned long cmsg_ptr; |
a74e9106 | 2180 | int err, total_len, len; |
1da177e4 LT |
2181 | |
2182 | /* kernel mode address */ | |
230b1839 | 2183 | struct sockaddr_storage addr; |
1da177e4 LT |
2184 | |
2185 | /* user mode address pointers */ | |
2186 | struct sockaddr __user *uaddr; | |
2187 | int __user *uaddr_len; | |
89bddce5 | 2188 | |
1da177e4 | 2189 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2190 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2191 | return -EFAULT; |
c6d409cf | 2192 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 2193 | return -EFAULT; |
1da177e4 | 2194 | |
a2e27255 | 2195 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2196 | err = -EMSGSIZE; |
2197 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2198 | goto out; | |
2199 | err = -ENOMEM; | |
2200 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2201 | GFP_KERNEL); | |
1da177e4 | 2202 | if (!iov) |
a2e27255 | 2203 | goto out; |
1da177e4 LT |
2204 | } |
2205 | ||
2206 | /* | |
89bddce5 SH |
2207 | * Save the user-mode address (verify_iovec will change the |
2208 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2209 | */ |
89bddce5 | 2210 | |
a2e27255 | 2211 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2212 | uaddr_len = COMPAT_NAMELEN(msg); |
2213 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2214 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 | 2215 | } else |
43db362d | 2216 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2217 | if (err < 0) |
2218 | goto out_freeiov; | |
89bddce5 | 2219 | total_len = err; |
1da177e4 | 2220 | |
a2e27255 ACM |
2221 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2222 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2223 | |
1da177e4 LT |
2224 | if (sock->file->f_flags & O_NONBLOCK) |
2225 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2226 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2227 | total_len, flags); | |
1da177e4 LT |
2228 | if (err < 0) |
2229 | goto out_freeiov; | |
2230 | len = err; | |
2231 | ||
2232 | if (uaddr != NULL) { | |
43db362d | 2233 | err = move_addr_to_user(&addr, |
a2e27255 | 2234 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2235 | uaddr_len); |
1da177e4 LT |
2236 | if (err < 0) |
2237 | goto out_freeiov; | |
2238 | } | |
a2e27255 | 2239 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2240 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2241 | if (err) |
2242 | goto out_freeiov; | |
2243 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2244 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2245 | &msg_compat->msg_controllen); |
2246 | else | |
a2e27255 | 2247 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2248 | &msg->msg_controllen); |
2249 | if (err) | |
2250 | goto out_freeiov; | |
2251 | err = len; | |
2252 | ||
2253 | out_freeiov: | |
2254 | if (iov != iovstack) | |
a74e9106 | 2255 | kfree(iov); |
a2e27255 ACM |
2256 | out: |
2257 | return err; | |
2258 | } | |
2259 | ||
2260 | /* | |
2261 | * BSD recvmsg interface | |
2262 | */ | |
2263 | ||
a7526eb5 | 2264 | long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2265 | { |
2266 | int fput_needed, err; | |
2267 | struct msghdr msg_sys; | |
1be374a0 AL |
2268 | struct socket *sock; |
2269 | ||
1be374a0 | 2270 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2271 | if (!sock) |
2272 | goto out; | |
2273 | ||
a7526eb5 | 2274 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2275 | |
6cb153ca | 2276 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2277 | out: |
2278 | return err; | |
2279 | } | |
2280 | ||
a7526eb5 AL |
2281 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
2282 | unsigned int, flags) | |
2283 | { | |
2284 | if (flags & MSG_CMSG_COMPAT) | |
2285 | return -EINVAL; | |
2286 | return __sys_recvmsg(fd, msg, flags); | |
2287 | } | |
2288 | ||
a2e27255 ACM |
2289 | /* |
2290 | * Linux recvmmsg interface | |
2291 | */ | |
2292 | ||
2293 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2294 | unsigned int flags, struct timespec *timeout) | |
2295 | { | |
2296 | int fput_needed, err, datagrams; | |
2297 | struct socket *sock; | |
2298 | struct mmsghdr __user *entry; | |
d7256d0e | 2299 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2300 | struct msghdr msg_sys; |
2301 | struct timespec end_time; | |
2302 | ||
2303 | if (timeout && | |
2304 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2305 | timeout->tv_nsec)) | |
2306 | return -EINVAL; | |
2307 | ||
2308 | datagrams = 0; | |
2309 | ||
2310 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2311 | if (!sock) | |
2312 | return err; | |
2313 | ||
2314 | err = sock_error(sock->sk); | |
2315 | if (err) | |
2316 | goto out_put; | |
2317 | ||
2318 | entry = mmsg; | |
d7256d0e | 2319 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2320 | |
2321 | while (datagrams < vlen) { | |
2322 | /* | |
2323 | * No need to ask LSM for more than the first datagram. | |
2324 | */ | |
d7256d0e | 2325 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2326 | err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
2327 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2328 | datagrams); | |
d7256d0e JMG |
2329 | if (err < 0) |
2330 | break; | |
2331 | err = __put_user(err, &compat_entry->msg_len); | |
2332 | ++compat_entry; | |
2333 | } else { | |
a7526eb5 AL |
2334 | err = ___sys_recvmsg(sock, |
2335 | (struct msghdr __user *)entry, | |
2336 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2337 | datagrams); | |
d7256d0e JMG |
2338 | if (err < 0) |
2339 | break; | |
2340 | err = put_user(err, &entry->msg_len); | |
2341 | ++entry; | |
2342 | } | |
2343 | ||
a2e27255 ACM |
2344 | if (err) |
2345 | break; | |
a2e27255 ACM |
2346 | ++datagrams; |
2347 | ||
71c5c159 BB |
2348 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2349 | if (flags & MSG_WAITFORONE) | |
2350 | flags |= MSG_DONTWAIT; | |
2351 | ||
a2e27255 ACM |
2352 | if (timeout) { |
2353 | ktime_get_ts(timeout); | |
2354 | *timeout = timespec_sub(end_time, *timeout); | |
2355 | if (timeout->tv_sec < 0) { | |
2356 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2357 | break; | |
2358 | } | |
2359 | ||
2360 | /* Timeout, return less than vlen datagrams */ | |
2361 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2362 | break; | |
2363 | } | |
2364 | ||
2365 | /* Out of band data, return right away */ | |
2366 | if (msg_sys.msg_flags & MSG_OOB) | |
2367 | break; | |
2368 | } | |
2369 | ||
2370 | out_put: | |
2371 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2372 | |
a2e27255 ACM |
2373 | if (err == 0) |
2374 | return datagrams; | |
2375 | ||
2376 | if (datagrams != 0) { | |
2377 | /* | |
2378 | * We may return less entries than requested (vlen) if the | |
2379 | * sock is non block and there aren't enough datagrams... | |
2380 | */ | |
2381 | if (err != -EAGAIN) { | |
2382 | /* | |
2383 | * ... or if recvmsg returns an error after we | |
2384 | * received some datagrams, where we record the | |
2385 | * error to return on the next call or if the | |
2386 | * app asks about it using getsockopt(SO_ERROR). | |
2387 | */ | |
2388 | sock->sk->sk_err = -err; | |
2389 | } | |
2390 | ||
2391 | return datagrams; | |
2392 | } | |
2393 | ||
2394 | return err; | |
2395 | } | |
2396 | ||
2397 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2398 | unsigned int, vlen, unsigned int, flags, | |
2399 | struct timespec __user *, timeout) | |
2400 | { | |
2401 | int datagrams; | |
2402 | struct timespec timeout_sys; | |
2403 | ||
1be374a0 AL |
2404 | if (flags & MSG_CMSG_COMPAT) |
2405 | return -EINVAL; | |
2406 | ||
a2e27255 ACM |
2407 | if (!timeout) |
2408 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2409 | ||
2410 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2411 | return -EFAULT; | |
2412 | ||
2413 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2414 | ||
2415 | if (datagrams > 0 && | |
2416 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2417 | datagrams = -EFAULT; | |
2418 | ||
2419 | return datagrams; | |
2420 | } | |
2421 | ||
2422 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2423 | /* Argument list sizes for sys_socketcall */ |
2424 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2425 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2426 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2427 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2428 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2429 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2430 | }; |
2431 | ||
1da177e4 LT |
2432 | #undef AL |
2433 | ||
2434 | /* | |
89bddce5 | 2435 | * System call vectors. |
1da177e4 LT |
2436 | * |
2437 | * Argument checking cleaned up. Saved 20% in size. | |
2438 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2439 | * it is set by the callees. |
1da177e4 LT |
2440 | */ |
2441 | ||
3e0fa65f | 2442 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2443 | { |
2950fa9d | 2444 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2445 | unsigned long a0, a1; |
1da177e4 | 2446 | int err; |
47379052 | 2447 | unsigned int len; |
1da177e4 | 2448 | |
228e548e | 2449 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2450 | return -EINVAL; |
2451 | ||
47379052 AV |
2452 | len = nargs[call]; |
2453 | if (len > sizeof(a)) | |
2454 | return -EINVAL; | |
2455 | ||
1da177e4 | 2456 | /* copy_from_user should be SMP safe. */ |
47379052 | 2457 | if (copy_from_user(a, args, len)) |
1da177e4 | 2458 | return -EFAULT; |
3ec3b2fb | 2459 | |
2950fa9d CG |
2460 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2461 | if (err) | |
2462 | return err; | |
3ec3b2fb | 2463 | |
89bddce5 SH |
2464 | a0 = a[0]; |
2465 | a1 = a[1]; | |
2466 | ||
2467 | switch (call) { | |
2468 | case SYS_SOCKET: | |
2469 | err = sys_socket(a0, a1, a[2]); | |
2470 | break; | |
2471 | case SYS_BIND: | |
2472 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2473 | break; | |
2474 | case SYS_CONNECT: | |
2475 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2476 | break; | |
2477 | case SYS_LISTEN: | |
2478 | err = sys_listen(a0, a1); | |
2479 | break; | |
2480 | case SYS_ACCEPT: | |
de11defe UD |
2481 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2482 | (int __user *)a[2], 0); | |
89bddce5 SH |
2483 | break; |
2484 | case SYS_GETSOCKNAME: | |
2485 | err = | |
2486 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2487 | (int __user *)a[2]); | |
2488 | break; | |
2489 | case SYS_GETPEERNAME: | |
2490 | err = | |
2491 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2492 | (int __user *)a[2]); | |
2493 | break; | |
2494 | case SYS_SOCKETPAIR: | |
2495 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2496 | break; | |
2497 | case SYS_SEND: | |
2498 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2499 | break; | |
2500 | case SYS_SENDTO: | |
2501 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2502 | (struct sockaddr __user *)a[4], a[5]); | |
2503 | break; | |
2504 | case SYS_RECV: | |
2505 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2506 | break; | |
2507 | case SYS_RECVFROM: | |
2508 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2509 | (struct sockaddr __user *)a[4], | |
2510 | (int __user *)a[5]); | |
2511 | break; | |
2512 | case SYS_SHUTDOWN: | |
2513 | err = sys_shutdown(a0, a1); | |
2514 | break; | |
2515 | case SYS_SETSOCKOPT: | |
2516 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2517 | break; | |
2518 | case SYS_GETSOCKOPT: | |
2519 | err = | |
2520 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2521 | (int __user *)a[4]); | |
2522 | break; | |
2523 | case SYS_SENDMSG: | |
2524 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2525 | break; | |
228e548e AB |
2526 | case SYS_SENDMMSG: |
2527 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2528 | break; | |
89bddce5 SH |
2529 | case SYS_RECVMSG: |
2530 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2531 | break; | |
a2e27255 ACM |
2532 | case SYS_RECVMMSG: |
2533 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2534 | (struct timespec __user *)a[4]); | |
2535 | break; | |
de11defe UD |
2536 | case SYS_ACCEPT4: |
2537 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2538 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2539 | break; |
89bddce5 SH |
2540 | default: |
2541 | err = -EINVAL; | |
2542 | break; | |
1da177e4 LT |
2543 | } |
2544 | return err; | |
2545 | } | |
2546 | ||
89bddce5 | 2547 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2548 | |
55737fda SH |
2549 | /** |
2550 | * sock_register - add a socket protocol handler | |
2551 | * @ops: description of protocol | |
2552 | * | |
1da177e4 LT |
2553 | * This function is called by a protocol handler that wants to |
2554 | * advertise its address family, and have it linked into the | |
55737fda SH |
2555 | * socket interface. The value ops->family coresponds to the |
2556 | * socket system call protocol family. | |
1da177e4 | 2557 | */ |
f0fd27d4 | 2558 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2559 | { |
2560 | int err; | |
2561 | ||
2562 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2563 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2564 | NPROTO); | |
1da177e4 LT |
2565 | return -ENOBUFS; |
2566 | } | |
55737fda SH |
2567 | |
2568 | spin_lock(&net_family_lock); | |
190683a9 ED |
2569 | if (rcu_dereference_protected(net_families[ops->family], |
2570 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2571 | err = -EEXIST; |
2572 | else { | |
cf778b00 | 2573 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2574 | err = 0; |
2575 | } | |
55737fda SH |
2576 | spin_unlock(&net_family_lock); |
2577 | ||
89bddce5 | 2578 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2579 | return err; |
2580 | } | |
c6d409cf | 2581 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2582 | |
55737fda SH |
2583 | /** |
2584 | * sock_unregister - remove a protocol handler | |
2585 | * @family: protocol family to remove | |
2586 | * | |
1da177e4 LT |
2587 | * This function is called by a protocol handler that wants to |
2588 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2589 | * new socket creation. |
2590 | * | |
2591 | * If protocol handler is a module, then it can use module reference | |
2592 | * counts to protect against new references. If protocol handler is not | |
2593 | * a module then it needs to provide its own protection in | |
2594 | * the ops->create routine. | |
1da177e4 | 2595 | */ |
f0fd27d4 | 2596 | void sock_unregister(int family) |
1da177e4 | 2597 | { |
f0fd27d4 | 2598 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2599 | |
55737fda | 2600 | spin_lock(&net_family_lock); |
a9b3cd7f | 2601 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2602 | spin_unlock(&net_family_lock); |
2603 | ||
2604 | synchronize_rcu(); | |
2605 | ||
89bddce5 | 2606 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2607 | } |
c6d409cf | 2608 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2609 | |
77d76ea3 | 2610 | static int __init sock_init(void) |
1da177e4 | 2611 | { |
b3e19d92 | 2612 | int err; |
2ca794e5 EB |
2613 | /* |
2614 | * Initialize the network sysctl infrastructure. | |
2615 | */ | |
2616 | err = net_sysctl_init(); | |
2617 | if (err) | |
2618 | goto out; | |
b3e19d92 | 2619 | |
1da177e4 | 2620 | /* |
89bddce5 | 2621 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2622 | */ |
2623 | skb_init(); | |
1da177e4 LT |
2624 | |
2625 | /* | |
89bddce5 | 2626 | * Initialize the protocols module. |
1da177e4 LT |
2627 | */ |
2628 | ||
2629 | init_inodecache(); | |
b3e19d92 NP |
2630 | |
2631 | err = register_filesystem(&sock_fs_type); | |
2632 | if (err) | |
2633 | goto out_fs; | |
1da177e4 | 2634 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2635 | if (IS_ERR(sock_mnt)) { |
2636 | err = PTR_ERR(sock_mnt); | |
2637 | goto out_mount; | |
2638 | } | |
77d76ea3 AK |
2639 | |
2640 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2641 | */ |
2642 | ||
2643 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2644 | err = netfilter_init(); |
2645 | if (err) | |
2646 | goto out; | |
1da177e4 | 2647 | #endif |
cbeb321a | 2648 | |
c1f19b51 RC |
2649 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2650 | skb_timestamping_init(); | |
2651 | #endif | |
2652 | ||
b3e19d92 NP |
2653 | out: |
2654 | return err; | |
2655 | ||
2656 | out_mount: | |
2657 | unregister_filesystem(&sock_fs_type); | |
2658 | out_fs: | |
2659 | goto out; | |
1da177e4 LT |
2660 | } |
2661 | ||
77d76ea3 AK |
2662 | core_initcall(sock_init); /* early initcall */ |
2663 | ||
1da177e4 LT |
2664 | #ifdef CONFIG_PROC_FS |
2665 | void socket_seq_show(struct seq_file *seq) | |
2666 | { | |
2667 | int cpu; | |
2668 | int counter = 0; | |
2669 | ||
6f912042 | 2670 | for_each_possible_cpu(cpu) |
89bddce5 | 2671 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2672 | |
2673 | /* It can be negative, by the way. 8) */ | |
2674 | if (counter < 0) | |
2675 | counter = 0; | |
2676 | ||
2677 | seq_printf(seq, "sockets: used %d\n", counter); | |
2678 | } | |
89bddce5 | 2679 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2680 | |
89bbfc95 | 2681 | #ifdef CONFIG_COMPAT |
6b96018b | 2682 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2683 | unsigned int cmd, void __user *up) |
7a229387 | 2684 | { |
7a229387 AB |
2685 | mm_segment_t old_fs = get_fs(); |
2686 | struct timeval ktv; | |
2687 | int err; | |
2688 | ||
2689 | set_fs(KERNEL_DS); | |
6b96018b | 2690 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2691 | set_fs(old_fs); |
644595f8 | 2692 | if (!err) |
ed6fe9d6 | 2693 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2694 | |
7a229387 AB |
2695 | return err; |
2696 | } | |
2697 | ||
6b96018b | 2698 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2699 | unsigned int cmd, void __user *up) |
7a229387 | 2700 | { |
7a229387 AB |
2701 | mm_segment_t old_fs = get_fs(); |
2702 | struct timespec kts; | |
2703 | int err; | |
2704 | ||
2705 | set_fs(KERNEL_DS); | |
6b96018b | 2706 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2707 | set_fs(old_fs); |
644595f8 | 2708 | if (!err) |
ed6fe9d6 | 2709 | err = compat_put_timespec(&kts, up); |
644595f8 | 2710 | |
7a229387 AB |
2711 | return err; |
2712 | } | |
2713 | ||
6b96018b | 2714 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2715 | { |
2716 | struct ifreq __user *uifr; | |
2717 | int err; | |
2718 | ||
2719 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2720 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2721 | return -EFAULT; |
2722 | ||
6b96018b | 2723 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2724 | if (err) |
2725 | return err; | |
2726 | ||
6b96018b | 2727 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2728 | return -EFAULT; |
2729 | ||
2730 | return 0; | |
2731 | } | |
2732 | ||
6b96018b | 2733 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2734 | { |
6b96018b | 2735 | struct compat_ifconf ifc32; |
7a229387 AB |
2736 | struct ifconf ifc; |
2737 | struct ifconf __user *uifc; | |
6b96018b | 2738 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2739 | struct ifreq __user *ifr; |
2740 | unsigned int i, j; | |
2741 | int err; | |
2742 | ||
6b96018b | 2743 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2744 | return -EFAULT; |
2745 | ||
43da5f2e | 2746 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2747 | if (ifc32.ifcbuf == 0) { |
2748 | ifc32.ifc_len = 0; | |
2749 | ifc.ifc_len = 0; | |
2750 | ifc.ifc_req = NULL; | |
2751 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2752 | } else { | |
c6d409cf ED |
2753 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2754 | sizeof(struct ifreq); | |
7a229387 AB |
2755 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2756 | ifc.ifc_len = len; | |
2757 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2758 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2759 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2760 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2761 | return -EFAULT; |
2762 | ifr++; | |
2763 | ifr32++; | |
2764 | } | |
2765 | } | |
2766 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2767 | return -EFAULT; | |
2768 | ||
6b96018b | 2769 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2770 | if (err) |
2771 | return err; | |
2772 | ||
2773 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2774 | return -EFAULT; | |
2775 | ||
2776 | ifr = ifc.ifc_req; | |
2777 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2778 | for (i = 0, j = 0; | |
c6d409cf ED |
2779 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2780 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2781 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2782 | return -EFAULT; |
2783 | ifr32++; | |
2784 | ifr++; | |
2785 | } | |
2786 | ||
2787 | if (ifc32.ifcbuf == 0) { | |
2788 | /* Translate from 64-bit structure multiple to | |
2789 | * a 32-bit one. | |
2790 | */ | |
2791 | i = ifc.ifc_len; | |
6b96018b | 2792 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2793 | ifc32.ifc_len = i; |
2794 | } else { | |
2795 | ifc32.ifc_len = i; | |
2796 | } | |
6b96018b | 2797 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2798 | return -EFAULT; |
2799 | ||
2800 | return 0; | |
2801 | } | |
2802 | ||
6b96018b | 2803 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2804 | { |
3a7da39d BH |
2805 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2806 | bool convert_in = false, convert_out = false; | |
2807 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2808 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2809 | struct ifreq __user *ifr; |
3a7da39d BH |
2810 | u32 rule_cnt = 0, actual_rule_cnt; |
2811 | u32 ethcmd; | |
7a229387 | 2812 | u32 data; |
3a7da39d | 2813 | int ret; |
7a229387 | 2814 | |
3a7da39d BH |
2815 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2816 | return -EFAULT; | |
7a229387 | 2817 | |
3a7da39d BH |
2818 | compat_rxnfc = compat_ptr(data); |
2819 | ||
2820 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2821 | return -EFAULT; |
2822 | ||
3a7da39d BH |
2823 | /* Most ethtool structures are defined without padding. |
2824 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2825 | */ | |
2826 | switch (ethcmd) { | |
2827 | default: | |
2828 | break; | |
2829 | case ETHTOOL_GRXCLSRLALL: | |
2830 | /* Buffer size is variable */ | |
2831 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2832 | return -EFAULT; | |
2833 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2834 | return -ENOMEM; | |
2835 | buf_size += rule_cnt * sizeof(u32); | |
2836 | /* fall through */ | |
2837 | case ETHTOOL_GRXRINGS: | |
2838 | case ETHTOOL_GRXCLSRLCNT: | |
2839 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2840 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2841 | convert_out = true; |
2842 | /* fall through */ | |
2843 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2844 | buf_size += sizeof(struct ethtool_rxnfc); |
2845 | convert_in = true; | |
2846 | break; | |
2847 | } | |
2848 | ||
2849 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2850 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2851 | |
2852 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2853 | return -EFAULT; |
2854 | ||
3a7da39d BH |
2855 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2856 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2857 | return -EFAULT; |
2858 | ||
3a7da39d | 2859 | if (convert_in) { |
127fe533 | 2860 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2861 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2862 | */ | |
127fe533 AD |
2863 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2864 | sizeof(compat_rxnfc->fs.m_ext) != | |
2865 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2866 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2867 | BUILD_BUG_ON( |
2868 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2869 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2870 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2871 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2872 | ||
2873 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2874 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2875 | (void __user *)rxnfc) || | |
3a7da39d BH |
2876 | copy_in_user(&rxnfc->fs.ring_cookie, |
2877 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2878 | (void __user *)(&rxnfc->fs.location + 1) - |
2879 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2880 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2881 | sizeof(rxnfc->rule_cnt))) | |
2882 | return -EFAULT; | |
2883 | } | |
2884 | ||
2885 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2886 | if (ret) | |
2887 | return ret; | |
2888 | ||
2889 | if (convert_out) { | |
2890 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2891 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2892 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2893 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2894 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2895 | (const void __user *)(&rxnfc->fs.location + 1) - |
2896 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2897 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2898 | sizeof(rxnfc->rule_cnt))) | |
2899 | return -EFAULT; | |
2900 | ||
2901 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2902 | /* As an optimisation, we only copy the actual | |
2903 | * number of rules that the underlying | |
2904 | * function returned. Since Mallory might | |
2905 | * change the rule count in user memory, we | |
2906 | * check that it is less than the rule count | |
2907 | * originally given (as the user buffer size), | |
2908 | * which has been range-checked. | |
2909 | */ | |
2910 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2911 | return -EFAULT; | |
2912 | if (actual_rule_cnt < rule_cnt) | |
2913 | rule_cnt = actual_rule_cnt; | |
2914 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2915 | &rxnfc->rule_locs[0], | |
2916 | rule_cnt * sizeof(u32))) | |
2917 | return -EFAULT; | |
2918 | } | |
2919 | } | |
2920 | ||
2921 | return 0; | |
7a229387 AB |
2922 | } |
2923 | ||
7a50a240 AB |
2924 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2925 | { | |
2926 | void __user *uptr; | |
2927 | compat_uptr_t uptr32; | |
2928 | struct ifreq __user *uifr; | |
2929 | ||
c6d409cf | 2930 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2931 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2932 | return -EFAULT; | |
2933 | ||
2934 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2935 | return -EFAULT; | |
2936 | ||
2937 | uptr = compat_ptr(uptr32); | |
2938 | ||
2939 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2940 | return -EFAULT; | |
2941 | ||
2942 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2943 | } | |
2944 | ||
6b96018b AB |
2945 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2946 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2947 | { |
2948 | struct ifreq kifr; | |
2949 | struct ifreq __user *uifr; | |
7a229387 AB |
2950 | mm_segment_t old_fs; |
2951 | int err; | |
2952 | u32 data; | |
2953 | void __user *datap; | |
2954 | ||
2955 | switch (cmd) { | |
2956 | case SIOCBONDENSLAVE: | |
2957 | case SIOCBONDRELEASE: | |
2958 | case SIOCBONDSETHWADDR: | |
2959 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2960 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2961 | return -EFAULT; |
2962 | ||
2963 | old_fs = get_fs(); | |
c6d409cf | 2964 | set_fs(KERNEL_DS); |
c3f52ae6 | 2965 | err = dev_ioctl(net, cmd, |
2966 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2967 | set_fs(old_fs); |
7a229387 AB |
2968 | |
2969 | return err; | |
2970 | case SIOCBONDSLAVEINFOQUERY: | |
2971 | case SIOCBONDINFOQUERY: | |
2972 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2973 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2974 | return -EFAULT; | |
2975 | ||
2976 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2977 | return -EFAULT; | |
2978 | ||
2979 | datap = compat_ptr(data); | |
2980 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2981 | return -EFAULT; | |
2982 | ||
6b96018b | 2983 | return dev_ioctl(net, cmd, uifr); |
7a229387 | 2984 | default: |
07d106d0 | 2985 | return -ENOIOCTLCMD; |
ccbd6a5a | 2986 | } |
7a229387 AB |
2987 | } |
2988 | ||
6b96018b AB |
2989 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2990 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2991 | { |
2992 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2993 | char tmp_buf[IFNAMSIZ]; |
2994 | void __user *data64; | |
2995 | u32 data32; | |
2996 | ||
2997 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2998 | IFNAMSIZ)) | |
2999 | return -EFAULT; | |
3000 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
3001 | return -EFAULT; | |
3002 | data64 = compat_ptr(data32); | |
3003 | ||
3004 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
3005 | ||
3006 | /* Don't check these user accesses, just let that get trapped | |
3007 | * in the ioctl handler instead. | |
3008 | */ | |
3009 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
3010 | IFNAMSIZ)) | |
3011 | return -EFAULT; | |
3012 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
3013 | return -EFAULT; | |
3014 | ||
6b96018b | 3015 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
3016 | } |
3017 | ||
6b96018b AB |
3018 | static int dev_ifsioc(struct net *net, struct socket *sock, |
3019 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 3020 | { |
a2116ed2 | 3021 | struct ifreq __user *uifr; |
7a229387 AB |
3022 | int err; |
3023 | ||
a2116ed2 AB |
3024 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
3025 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
3026 | return -EFAULT; | |
3027 | ||
3028 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
3029 | ||
7a229387 AB |
3030 | if (!err) { |
3031 | switch (cmd) { | |
3032 | case SIOCGIFFLAGS: | |
3033 | case SIOCGIFMETRIC: | |
3034 | case SIOCGIFMTU: | |
3035 | case SIOCGIFMEM: | |
3036 | case SIOCGIFHWADDR: | |
3037 | case SIOCGIFINDEX: | |
3038 | case SIOCGIFADDR: | |
3039 | case SIOCGIFBRDADDR: | |
3040 | case SIOCGIFDSTADDR: | |
3041 | case SIOCGIFNETMASK: | |
fab2532b | 3042 | case SIOCGIFPFLAGS: |
7a229387 | 3043 | case SIOCGIFTXQLEN: |
fab2532b AB |
3044 | case SIOCGMIIPHY: |
3045 | case SIOCGMIIREG: | |
a2116ed2 | 3046 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
3047 | err = -EFAULT; |
3048 | break; | |
3049 | } | |
3050 | } | |
3051 | return err; | |
3052 | } | |
3053 | ||
a2116ed2 AB |
3054 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3055 | struct compat_ifreq __user *uifr32) | |
3056 | { | |
3057 | struct ifreq ifr; | |
3058 | struct compat_ifmap __user *uifmap32; | |
3059 | mm_segment_t old_fs; | |
3060 | int err; | |
3061 | ||
3062 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3063 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3064 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3065 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3066 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3067 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3068 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3069 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
3070 | if (err) | |
3071 | return -EFAULT; | |
3072 | ||
3073 | old_fs = get_fs(); | |
c6d409cf | 3074 | set_fs(KERNEL_DS); |
c3f52ae6 | 3075 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3076 | set_fs(old_fs); |
a2116ed2 AB |
3077 | |
3078 | if (cmd == SIOCGIFMAP && !err) { | |
3079 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3080 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3081 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3082 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3083 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3084 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3085 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
3086 | if (err) | |
3087 | err = -EFAULT; | |
3088 | } | |
3089 | return err; | |
3090 | } | |
3091 | ||
3092 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
3093 | { | |
3094 | void __user *uptr; | |
3095 | compat_uptr_t uptr32; | |
3096 | struct ifreq __user *uifr; | |
3097 | ||
c6d409cf | 3098 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
a2116ed2 AB |
3099 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
3100 | return -EFAULT; | |
3101 | ||
3102 | if (get_user(uptr32, &uifr32->ifr_data)) | |
3103 | return -EFAULT; | |
3104 | ||
3105 | uptr = compat_ptr(uptr32); | |
3106 | ||
3107 | if (put_user(uptr, &uifr->ifr_data)) | |
3108 | return -EFAULT; | |
3109 | ||
3110 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
3111 | } | |
3112 | ||
7a229387 | 3113 | struct rtentry32 { |
c6d409cf | 3114 | u32 rt_pad1; |
7a229387 AB |
3115 | struct sockaddr rt_dst; /* target address */ |
3116 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3117 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3118 | unsigned short rt_flags; |
3119 | short rt_pad2; | |
3120 | u32 rt_pad3; | |
3121 | unsigned char rt_tos; | |
3122 | unsigned char rt_class; | |
3123 | short rt_pad4; | |
3124 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3125 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3126 | u32 rt_mtu; /* per route MTU/Window */ |
3127 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3128 | unsigned short rt_irtt; /* Initial RTT */ |
3129 | }; | |
3130 | ||
3131 | struct in6_rtmsg32 { | |
3132 | struct in6_addr rtmsg_dst; | |
3133 | struct in6_addr rtmsg_src; | |
3134 | struct in6_addr rtmsg_gateway; | |
3135 | u32 rtmsg_type; | |
3136 | u16 rtmsg_dst_len; | |
3137 | u16 rtmsg_src_len; | |
3138 | u32 rtmsg_metric; | |
3139 | u32 rtmsg_info; | |
3140 | u32 rtmsg_flags; | |
3141 | s32 rtmsg_ifindex; | |
3142 | }; | |
3143 | ||
6b96018b AB |
3144 | static int routing_ioctl(struct net *net, struct socket *sock, |
3145 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3146 | { |
3147 | int ret; | |
3148 | void *r = NULL; | |
3149 | struct in6_rtmsg r6; | |
3150 | struct rtentry r4; | |
3151 | char devname[16]; | |
3152 | u32 rtdev; | |
3153 | mm_segment_t old_fs = get_fs(); | |
3154 | ||
6b96018b AB |
3155 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3156 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3157 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3158 | 3 * sizeof(struct in6_addr)); |
c6d409cf ED |
3159 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3160 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3161 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3162 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3163 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3164 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3165 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3166 | |
3167 | r = (void *) &r6; | |
3168 | } else { /* ipv4 */ | |
6b96018b | 3169 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3170 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3171 | 3 * sizeof(struct sockaddr)); |
c6d409cf ED |
3172 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
3173 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3174 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3175 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
3176 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3177 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3178 | if (rtdev) { |
c6d409cf | 3179 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3180 | r4.rt_dev = (char __user __force *)devname; |
3181 | devname[15] = 0; | |
7a229387 AB |
3182 | } else |
3183 | r4.rt_dev = NULL; | |
3184 | ||
3185 | r = (void *) &r4; | |
3186 | } | |
3187 | ||
3188 | if (ret) { | |
3189 | ret = -EFAULT; | |
3190 | goto out; | |
3191 | } | |
3192 | ||
c6d409cf | 3193 | set_fs(KERNEL_DS); |
6b96018b | 3194 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3195 | set_fs(old_fs); |
7a229387 AB |
3196 | |
3197 | out: | |
7a229387 AB |
3198 | return ret; |
3199 | } | |
3200 | ||
3201 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3202 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3203 | * use compatible ioctls |
7a229387 | 3204 | */ |
6b96018b | 3205 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3206 | { |
6b96018b | 3207 | compat_ulong_t tmp; |
7a229387 | 3208 | |
6b96018b | 3209 | if (get_user(tmp, argp)) |
7a229387 AB |
3210 | return -EFAULT; |
3211 | if (tmp == BRCTL_GET_VERSION) | |
3212 | return BRCTL_VERSION + 1; | |
3213 | return -EINVAL; | |
3214 | } | |
3215 | ||
6b96018b AB |
3216 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3217 | unsigned int cmd, unsigned long arg) | |
3218 | { | |
3219 | void __user *argp = compat_ptr(arg); | |
3220 | struct sock *sk = sock->sk; | |
3221 | struct net *net = sock_net(sk); | |
7a229387 | 3222 | |
6b96018b AB |
3223 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
3224 | return siocdevprivate_ioctl(net, cmd, argp); | |
3225 | ||
3226 | switch (cmd) { | |
3227 | case SIOCSIFBR: | |
3228 | case SIOCGIFBR: | |
3229 | return old_bridge_ioctl(argp); | |
3230 | case SIOCGIFNAME: | |
3231 | return dev_ifname32(net, argp); | |
3232 | case SIOCGIFCONF: | |
3233 | return dev_ifconf(net, argp); | |
3234 | case SIOCETHTOOL: | |
3235 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3236 | case SIOCWANDEV: |
3237 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3238 | case SIOCGIFMAP: |
3239 | case SIOCSIFMAP: | |
3240 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3241 | case SIOCBONDENSLAVE: |
3242 | case SIOCBONDRELEASE: | |
3243 | case SIOCBONDSETHWADDR: | |
3244 | case SIOCBONDSLAVEINFOQUERY: | |
3245 | case SIOCBONDINFOQUERY: | |
3246 | case SIOCBONDCHANGEACTIVE: | |
3247 | return bond_ioctl(net, cmd, argp); | |
3248 | case SIOCADDRT: | |
3249 | case SIOCDELRT: | |
3250 | return routing_ioctl(net, sock, cmd, argp); | |
3251 | case SIOCGSTAMP: | |
3252 | return do_siocgstamp(net, sock, cmd, argp); | |
3253 | case SIOCGSTAMPNS: | |
3254 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
3255 | case SIOCSHWTSTAMP: |
3256 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
3257 | |
3258 | case FIOSETOWN: | |
3259 | case SIOCSPGRP: | |
3260 | case FIOGETOWN: | |
3261 | case SIOCGPGRP: | |
3262 | case SIOCBRADDBR: | |
3263 | case SIOCBRDELBR: | |
3264 | case SIOCGIFVLAN: | |
3265 | case SIOCSIFVLAN: | |
3266 | case SIOCADDDLCI: | |
3267 | case SIOCDELDLCI: | |
3268 | return sock_ioctl(file, cmd, arg); | |
3269 | ||
3270 | case SIOCGIFFLAGS: | |
3271 | case SIOCSIFFLAGS: | |
3272 | case SIOCGIFMETRIC: | |
3273 | case SIOCSIFMETRIC: | |
3274 | case SIOCGIFMTU: | |
3275 | case SIOCSIFMTU: | |
3276 | case SIOCGIFMEM: | |
3277 | case SIOCSIFMEM: | |
3278 | case SIOCGIFHWADDR: | |
3279 | case SIOCSIFHWADDR: | |
3280 | case SIOCADDMULTI: | |
3281 | case SIOCDELMULTI: | |
3282 | case SIOCGIFINDEX: | |
6b96018b AB |
3283 | case SIOCGIFADDR: |
3284 | case SIOCSIFADDR: | |
3285 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3286 | case SIOCDIFADDR: |
6b96018b AB |
3287 | case SIOCGIFBRDADDR: |
3288 | case SIOCSIFBRDADDR: | |
3289 | case SIOCGIFDSTADDR: | |
3290 | case SIOCSIFDSTADDR: | |
3291 | case SIOCGIFNETMASK: | |
3292 | case SIOCSIFNETMASK: | |
3293 | case SIOCSIFPFLAGS: | |
3294 | case SIOCGIFPFLAGS: | |
3295 | case SIOCGIFTXQLEN: | |
3296 | case SIOCSIFTXQLEN: | |
3297 | case SIOCBRADDIF: | |
3298 | case SIOCBRDELIF: | |
9177efd3 AB |
3299 | case SIOCSIFNAME: |
3300 | case SIOCGMIIPHY: | |
3301 | case SIOCGMIIREG: | |
3302 | case SIOCSMIIREG: | |
6b96018b | 3303 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3304 | |
6b96018b AB |
3305 | case SIOCSARP: |
3306 | case SIOCGARP: | |
3307 | case SIOCDARP: | |
6b96018b | 3308 | case SIOCATMARK: |
9177efd3 AB |
3309 | return sock_do_ioctl(net, sock, cmd, arg); |
3310 | } | |
3311 | ||
6b96018b AB |
3312 | return -ENOIOCTLCMD; |
3313 | } | |
7a229387 | 3314 | |
95c96174 | 3315 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3316 | unsigned long arg) |
89bbfc95 SP |
3317 | { |
3318 | struct socket *sock = file->private_data; | |
3319 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3320 | struct sock *sk; |
3321 | struct net *net; | |
3322 | ||
3323 | sk = sock->sk; | |
3324 | net = sock_net(sk); | |
89bbfc95 SP |
3325 | |
3326 | if (sock->ops->compat_ioctl) | |
3327 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3328 | ||
87de87d5 DM |
3329 | if (ret == -ENOIOCTLCMD && |
3330 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3331 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3332 | ||
6b96018b AB |
3333 | if (ret == -ENOIOCTLCMD) |
3334 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3335 | ||
89bbfc95 SP |
3336 | return ret; |
3337 | } | |
3338 | #endif | |
3339 | ||
ac5a488e SS |
3340 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3341 | { | |
3342 | return sock->ops->bind(sock, addr, addrlen); | |
3343 | } | |
c6d409cf | 3344 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3345 | |
3346 | int kernel_listen(struct socket *sock, int backlog) | |
3347 | { | |
3348 | return sock->ops->listen(sock, backlog); | |
3349 | } | |
c6d409cf | 3350 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3351 | |
3352 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3353 | { | |
3354 | struct sock *sk = sock->sk; | |
3355 | int err; | |
3356 | ||
3357 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3358 | newsock); | |
3359 | if (err < 0) | |
3360 | goto done; | |
3361 | ||
3362 | err = sock->ops->accept(sock, *newsock, flags); | |
3363 | if (err < 0) { | |
3364 | sock_release(*newsock); | |
fa8705b0 | 3365 | *newsock = NULL; |
ac5a488e SS |
3366 | goto done; |
3367 | } | |
3368 | ||
3369 | (*newsock)->ops = sock->ops; | |
1b08534e | 3370 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3371 | |
3372 | done: | |
3373 | return err; | |
3374 | } | |
c6d409cf | 3375 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3376 | |
3377 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3378 | int flags) |
ac5a488e SS |
3379 | { |
3380 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3381 | } | |
c6d409cf | 3382 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3383 | |
3384 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3385 | int *addrlen) | |
3386 | { | |
3387 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3388 | } | |
c6d409cf | 3389 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3390 | |
3391 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3392 | int *addrlen) | |
3393 | { | |
3394 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3395 | } | |
c6d409cf | 3396 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3397 | |
3398 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3399 | char *optval, int *optlen) | |
3400 | { | |
3401 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3402 | char __user *uoptval; |
3403 | int __user *uoptlen; | |
ac5a488e SS |
3404 | int err; |
3405 | ||
fb8621bb NK |
3406 | uoptval = (char __user __force *) optval; |
3407 | uoptlen = (int __user __force *) optlen; | |
3408 | ||
ac5a488e SS |
3409 | set_fs(KERNEL_DS); |
3410 | if (level == SOL_SOCKET) | |
fb8621bb | 3411 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3412 | else |
fb8621bb NK |
3413 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3414 | uoptlen); | |
ac5a488e SS |
3415 | set_fs(oldfs); |
3416 | return err; | |
3417 | } | |
c6d409cf | 3418 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3419 | |
3420 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3421 | char *optval, unsigned int optlen) |
ac5a488e SS |
3422 | { |
3423 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3424 | char __user *uoptval; |
ac5a488e SS |
3425 | int err; |
3426 | ||
fb8621bb NK |
3427 | uoptval = (char __user __force *) optval; |
3428 | ||
ac5a488e SS |
3429 | set_fs(KERNEL_DS); |
3430 | if (level == SOL_SOCKET) | |
fb8621bb | 3431 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3432 | else |
fb8621bb | 3433 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3434 | optlen); |
3435 | set_fs(oldfs); | |
3436 | return err; | |
3437 | } | |
c6d409cf | 3438 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3439 | |
3440 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3441 | size_t size, int flags) | |
3442 | { | |
3443 | if (sock->ops->sendpage) | |
3444 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3445 | ||
3446 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3447 | } | |
c6d409cf | 3448 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3449 | |
3450 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3451 | { | |
3452 | mm_segment_t oldfs = get_fs(); | |
3453 | int err; | |
3454 | ||
3455 | set_fs(KERNEL_DS); | |
3456 | err = sock->ops->ioctl(sock, cmd, arg); | |
3457 | set_fs(oldfs); | |
3458 | ||
3459 | return err; | |
3460 | } | |
c6d409cf | 3461 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3462 | |
91cf45f0 TM |
3463 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3464 | { | |
3465 | return sock->ops->shutdown(sock, how); | |
3466 | } | |
91cf45f0 | 3467 | EXPORT_SYMBOL(kernel_sock_shutdown); |