Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 | 72 | #include <linux/if_bridge.h> |
20380731 ACM |
73 | #include <linux/if_frad.h> |
74 | #include <linux/if_vlan.h> | |
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> | |
107 | ||
1da177e4 | 108 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
109 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
110 | unsigned long nr_segs, loff_t pos); | |
111 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
112 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 113 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
114 | |
115 | static int sock_close(struct inode *inode, struct file *file); | |
116 | static unsigned int sock_poll(struct file *file, | |
117 | struct poll_table_struct *wait); | |
89bddce5 | 118 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
119 | #ifdef CONFIG_COMPAT |
120 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 121 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 122 | #endif |
1da177e4 | 123 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
124 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
125 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 126 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 127 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 128 | unsigned int flags); |
1da177e4 | 129 | |
1da177e4 LT |
130 | /* |
131 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
132 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
133 | */ | |
134 | ||
da7071d7 | 135 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
136 | .owner = THIS_MODULE, |
137 | .llseek = no_llseek, | |
138 | .aio_read = sock_aio_read, | |
139 | .aio_write = sock_aio_write, | |
140 | .poll = sock_poll, | |
141 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
142 | #ifdef CONFIG_COMPAT |
143 | .compat_ioctl = compat_sock_ioctl, | |
144 | #endif | |
1da177e4 LT |
145 | .mmap = sock_mmap, |
146 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
147 | .release = sock_close, | |
148 | .fasync = sock_fasync, | |
5274f052 JA |
149 | .sendpage = sock_sendpage, |
150 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 151 | .splice_read = sock_splice_read, |
1da177e4 LT |
152 | }; |
153 | ||
154 | /* | |
155 | * The protocol list. Each protocol is registered in here. | |
156 | */ | |
157 | ||
1da177e4 | 158 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 159 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 160 | |
1da177e4 LT |
161 | /* |
162 | * Statistics counters of the socket lists | |
163 | */ | |
164 | ||
c6d409cf | 165 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
166 | |
167 | /* | |
89bddce5 SH |
168 | * Support routines. |
169 | * Move socket addresses back and forth across the kernel/user | |
170 | * divide and look after the messy bits. | |
1da177e4 LT |
171 | */ |
172 | ||
1da177e4 LT |
173 | /** |
174 | * move_addr_to_kernel - copy a socket address into kernel space | |
175 | * @uaddr: Address in user space | |
176 | * @kaddr: Address in kernel space | |
177 | * @ulen: Length in user space | |
178 | * | |
179 | * The address is copied into kernel space. If the provided address is | |
180 | * too long an error code of -EINVAL is returned. If the copy gives | |
181 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
182 | */ | |
183 | ||
43db362d | 184 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 185 | { |
230b1839 | 186 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 187 | return -EINVAL; |
89bddce5 | 188 | if (ulen == 0) |
1da177e4 | 189 | return 0; |
89bddce5 | 190 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 191 | return -EFAULT; |
3ec3b2fb | 192 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
193 | } |
194 | ||
195 | /** | |
196 | * move_addr_to_user - copy an address to user space | |
197 | * @kaddr: kernel space address | |
198 | * @klen: length of address in kernel | |
199 | * @uaddr: user space address | |
200 | * @ulen: pointer to user length field | |
201 | * | |
202 | * The value pointed to by ulen on entry is the buffer length available. | |
203 | * This is overwritten with the buffer space used. -EINVAL is returned | |
204 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
205 | * is returned if either the buffer or the length field are not | |
206 | * accessible. | |
207 | * After copying the data up to the limit the user specifies, the true | |
208 | * length of the data is written over the length limit the user | |
209 | * specified. Zero is returned for a success. | |
210 | */ | |
89bddce5 | 211 | |
43db362d | 212 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 213 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
214 | { |
215 | int err; | |
216 | int len; | |
217 | ||
5c586f16 | 218 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
89bddce5 SH |
219 | err = get_user(len, ulen); |
220 | if (err) | |
1da177e4 | 221 | return err; |
89bddce5 SH |
222 | if (len > klen) |
223 | len = klen; | |
5c586f16 | 224 | if (len < 0) |
1da177e4 | 225 | return -EINVAL; |
89bddce5 | 226 | if (len) { |
d6fe3945 SG |
227 | if (audit_sockaddr(klen, kaddr)) |
228 | return -ENOMEM; | |
89bddce5 | 229 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
230 | return -EFAULT; |
231 | } | |
232 | /* | |
89bddce5 SH |
233 | * "fromlen shall refer to the value before truncation.." |
234 | * 1003.1g | |
1da177e4 LT |
235 | */ |
236 | return __put_user(klen, ulen); | |
237 | } | |
238 | ||
e18b890b | 239 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
240 | |
241 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
242 | { | |
243 | struct socket_alloc *ei; | |
eaefd110 | 244 | struct socket_wq *wq; |
89bddce5 | 245 | |
e94b1766 | 246 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
247 | if (!ei) |
248 | return NULL; | |
eaefd110 ED |
249 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
250 | if (!wq) { | |
43815482 ED |
251 | kmem_cache_free(sock_inode_cachep, ei); |
252 | return NULL; | |
253 | } | |
eaefd110 ED |
254 | init_waitqueue_head(&wq->wait); |
255 | wq->fasync_list = NULL; | |
256 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 257 | |
1da177e4 LT |
258 | ei->socket.state = SS_UNCONNECTED; |
259 | ei->socket.flags = 0; | |
260 | ei->socket.ops = NULL; | |
261 | ei->socket.sk = NULL; | |
262 | ei->socket.file = NULL; | |
1da177e4 LT |
263 | |
264 | return &ei->vfs_inode; | |
265 | } | |
266 | ||
267 | static void sock_destroy_inode(struct inode *inode) | |
268 | { | |
43815482 | 269 | struct socket_alloc *ei; |
eaefd110 | 270 | struct socket_wq *wq; |
43815482 ED |
271 | |
272 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 273 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 274 | kfree_rcu(wq, rcu); |
43815482 | 275 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
276 | } |
277 | ||
51cc5068 | 278 | static void init_once(void *foo) |
1da177e4 | 279 | { |
89bddce5 | 280 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 281 | |
a35afb83 | 282 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 283 | } |
89bddce5 | 284 | |
1da177e4 LT |
285 | static int init_inodecache(void) |
286 | { | |
287 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
288 | sizeof(struct socket_alloc), |
289 | 0, | |
290 | (SLAB_HWCACHE_ALIGN | | |
291 | SLAB_RECLAIM_ACCOUNT | | |
292 | SLAB_MEM_SPREAD), | |
20c2df83 | 293 | init_once); |
1da177e4 LT |
294 | if (sock_inode_cachep == NULL) |
295 | return -ENOMEM; | |
296 | return 0; | |
297 | } | |
298 | ||
b87221de | 299 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
300 | .alloc_inode = sock_alloc_inode, |
301 | .destroy_inode = sock_destroy_inode, | |
302 | .statfs = simple_statfs, | |
1da177e4 LT |
303 | }; |
304 | ||
c23fbb6b ED |
305 | /* |
306 | * sockfs_dname() is called from d_path(). | |
307 | */ | |
308 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
309 | { | |
310 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
311 | dentry->d_inode->i_ino); | |
312 | } | |
313 | ||
3ba13d17 | 314 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 315 | .d_dname = sockfs_dname, |
1da177e4 LT |
316 | }; |
317 | ||
c74a1cbb AV |
318 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
319 | int flags, const char *dev_name, void *data) | |
320 | { | |
321 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
322 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
323 | } | |
324 | ||
325 | static struct vfsmount *sock_mnt __read_mostly; | |
326 | ||
327 | static struct file_system_type sock_fs_type = { | |
328 | .name = "sockfs", | |
329 | .mount = sockfs_mount, | |
330 | .kill_sb = kill_anon_super, | |
331 | }; | |
332 | ||
1da177e4 LT |
333 | /* |
334 | * Obtains the first available file descriptor and sets it up for use. | |
335 | * | |
39d8c1b6 DM |
336 | * These functions create file structures and maps them to fd space |
337 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
338 | * and file struct implicitly stored in sock->file. |
339 | * Note that another thread may close file descriptor before we return | |
340 | * from this function. We use the fact that now we do not refer | |
341 | * to socket after mapping. If one day we will need it, this | |
342 | * function will increment ref. count on file by 1. | |
343 | * | |
344 | * In any case returned fd MAY BE not valid! | |
345 | * This race condition is unavoidable | |
346 | * with shared fd spaces, we cannot solve it inside kernel, | |
347 | * but we take care of internal coherence yet. | |
348 | */ | |
349 | ||
aab174f0 | 350 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 351 | { |
7cbe66b6 | 352 | struct qstr name = { .name = "" }; |
2c48b9c4 | 353 | struct path path; |
7cbe66b6 | 354 | struct file *file; |
1da177e4 | 355 | |
600e1779 MY |
356 | if (dname) { |
357 | name.name = dname; | |
358 | name.len = strlen(name.name); | |
359 | } else if (sock->sk) { | |
360 | name.name = sock->sk->sk_prot_creator->name; | |
361 | name.len = strlen(name.name); | |
362 | } | |
4b936885 | 363 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
364 | if (unlikely(!path.dentry)) |
365 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 366 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 367 | |
2c48b9c4 | 368 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 369 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 370 | |
2c48b9c4 | 371 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 372 | &socket_file_ops); |
39b65252 | 373 | if (unlikely(IS_ERR(file))) { |
cc3808f8 | 374 | /* drop dentry, keep inode */ |
7de9c6ee | 375 | ihold(path.dentry->d_inode); |
2c48b9c4 | 376 | path_put(&path); |
39b65252 | 377 | return file; |
cc3808f8 AV |
378 | } |
379 | ||
380 | sock->file = file; | |
77d27200 | 381 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 382 | file->private_data = sock; |
28407630 | 383 | return file; |
39d8c1b6 | 384 | } |
56b31d1c | 385 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 386 | |
56b31d1c | 387 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
388 | { |
389 | struct file *newfile; | |
28407630 AV |
390 | int fd = get_unused_fd_flags(flags); |
391 | if (unlikely(fd < 0)) | |
392 | return fd; | |
39d8c1b6 | 393 | |
aab174f0 | 394 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 395 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 396 | fd_install(fd, newfile); |
28407630 AV |
397 | return fd; |
398 | } | |
7cbe66b6 | 399 | |
28407630 AV |
400 | put_unused_fd(fd); |
401 | return PTR_ERR(newfile); | |
1da177e4 LT |
402 | } |
403 | ||
406a3c63 | 404 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 405 | { |
6cb153ca BL |
406 | if (file->f_op == &socket_file_ops) |
407 | return file->private_data; /* set in sock_map_fd */ | |
408 | ||
23bb80d2 ED |
409 | *err = -ENOTSOCK; |
410 | return NULL; | |
6cb153ca | 411 | } |
406a3c63 | 412 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 413 | |
1da177e4 | 414 | /** |
c6d409cf | 415 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
416 | * @fd: file handle |
417 | * @err: pointer to an error code return | |
418 | * | |
419 | * The file handle passed in is locked and the socket it is bound | |
420 | * too is returned. If an error occurs the err pointer is overwritten | |
421 | * with a negative errno code and NULL is returned. The function checks | |
422 | * for both invalid handles and passing a handle which is not a socket. | |
423 | * | |
424 | * On a success the socket object pointer is returned. | |
425 | */ | |
426 | ||
427 | struct socket *sockfd_lookup(int fd, int *err) | |
428 | { | |
429 | struct file *file; | |
1da177e4 LT |
430 | struct socket *sock; |
431 | ||
89bddce5 SH |
432 | file = fget(fd); |
433 | if (!file) { | |
1da177e4 LT |
434 | *err = -EBADF; |
435 | return NULL; | |
436 | } | |
89bddce5 | 437 | |
6cb153ca BL |
438 | sock = sock_from_file(file, err); |
439 | if (!sock) | |
1da177e4 | 440 | fput(file); |
6cb153ca BL |
441 | return sock; |
442 | } | |
c6d409cf | 443 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 444 | |
6cb153ca BL |
445 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
446 | { | |
447 | struct file *file; | |
448 | struct socket *sock; | |
449 | ||
3672558c | 450 | *err = -EBADF; |
6cb153ca BL |
451 | file = fget_light(fd, fput_needed); |
452 | if (file) { | |
453 | sock = sock_from_file(file, err); | |
454 | if (sock) | |
455 | return sock; | |
456 | fput_light(file, *fput_needed); | |
1da177e4 | 457 | } |
6cb153ca | 458 | return NULL; |
1da177e4 LT |
459 | } |
460 | ||
600e1779 MY |
461 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
462 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
463 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
464 | static ssize_t sockfs_getxattr(struct dentry *dentry, | |
465 | const char *name, void *value, size_t size) | |
466 | { | |
467 | const char *proto_name; | |
468 | size_t proto_size; | |
469 | int error; | |
470 | ||
471 | error = -ENODATA; | |
472 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { | |
473 | proto_name = dentry->d_name.name; | |
474 | proto_size = strlen(proto_name); | |
475 | ||
476 | if (value) { | |
477 | error = -ERANGE; | |
478 | if (proto_size + 1 > size) | |
479 | goto out; | |
480 | ||
481 | strncpy(value, proto_name, proto_size + 1); | |
482 | } | |
483 | error = proto_size + 1; | |
484 | } | |
485 | ||
486 | out: | |
487 | return error; | |
488 | } | |
489 | ||
490 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, | |
491 | size_t size) | |
492 | { | |
493 | ssize_t len; | |
494 | ssize_t used = 0; | |
495 | ||
496 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); | |
497 | if (len < 0) | |
498 | return len; | |
499 | used += len; | |
500 | if (buffer) { | |
501 | if (size < used) | |
502 | return -ERANGE; | |
503 | buffer += len; | |
504 | } | |
505 | ||
506 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
507 | used += len; | |
508 | if (buffer) { | |
509 | if (size < used) | |
510 | return -ERANGE; | |
511 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
512 | buffer += len; | |
513 | } | |
514 | ||
515 | return used; | |
516 | } | |
517 | ||
518 | static const struct inode_operations sockfs_inode_ops = { | |
519 | .getxattr = sockfs_getxattr, | |
520 | .listxattr = sockfs_listxattr, | |
521 | }; | |
522 | ||
1da177e4 LT |
523 | /** |
524 | * sock_alloc - allocate a socket | |
89bddce5 | 525 | * |
1da177e4 LT |
526 | * Allocate a new inode and socket object. The two are bound together |
527 | * and initialised. The socket is then returned. If we are out of inodes | |
528 | * NULL is returned. | |
529 | */ | |
530 | ||
531 | static struct socket *sock_alloc(void) | |
532 | { | |
89bddce5 SH |
533 | struct inode *inode; |
534 | struct socket *sock; | |
1da177e4 | 535 | |
a209dfc7 | 536 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
537 | if (!inode) |
538 | return NULL; | |
539 | ||
540 | sock = SOCKET_I(inode); | |
541 | ||
29a020d3 | 542 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 543 | inode->i_ino = get_next_ino(); |
89bddce5 | 544 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
545 | inode->i_uid = current_fsuid(); |
546 | inode->i_gid = current_fsgid(); | |
600e1779 | 547 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 548 | |
19e8d69c | 549 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
550 | return sock; |
551 | } | |
552 | ||
553 | /* | |
554 | * In theory you can't get an open on this inode, but /proc provides | |
555 | * a back door. Remember to keep it shut otherwise you'll let the | |
556 | * creepy crawlies in. | |
557 | */ | |
89bddce5 | 558 | |
1da177e4 LT |
559 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
560 | { | |
561 | return -ENXIO; | |
562 | } | |
563 | ||
4b6f5d20 | 564 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
565 | .owner = THIS_MODULE, |
566 | .open = sock_no_open, | |
6038f373 | 567 | .llseek = noop_llseek, |
1da177e4 LT |
568 | }; |
569 | ||
570 | /** | |
571 | * sock_release - close a socket | |
572 | * @sock: socket to close | |
573 | * | |
574 | * The socket is released from the protocol stack if it has a release | |
575 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 576 | * an inode not a file. |
1da177e4 | 577 | */ |
89bddce5 | 578 | |
1da177e4 LT |
579 | void sock_release(struct socket *sock) |
580 | { | |
581 | if (sock->ops) { | |
582 | struct module *owner = sock->ops->owner; | |
583 | ||
584 | sock->ops->release(sock); | |
585 | sock->ops = NULL; | |
586 | module_put(owner); | |
587 | } | |
588 | ||
eaefd110 | 589 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
1da177e4 LT |
590 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
591 | ||
b09e786b MP |
592 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
593 | return; | |
594 | ||
19e8d69c | 595 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
596 | if (!sock->file) { |
597 | iput(SOCK_INODE(sock)); | |
598 | return; | |
599 | } | |
89bddce5 | 600 | sock->file = NULL; |
1da177e4 | 601 | } |
c6d409cf | 602 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 603 | |
bf84a010 | 604 | void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 605 | { |
2244d07b | 606 | *tx_flags = 0; |
20d49473 | 607 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 608 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 609 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 610 | *tx_flags |= SKBTX_SW_TSTAMP; |
6e3e939f JB |
611 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
612 | *tx_flags |= SKBTX_WIFI_STATUS; | |
20d49473 PO |
613 | } |
614 | EXPORT_SYMBOL(sock_tx_timestamp); | |
615 | ||
228e548e AB |
616 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
617 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
618 | { |
619 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 LT |
620 | |
621 | si->sock = sock; | |
622 | si->scm = NULL; | |
623 | si->msg = msg; | |
624 | si->size = size; | |
625 | ||
1da177e4 LT |
626 | return sock->ops->sendmsg(iocb, sock, msg, size); |
627 | } | |
628 | ||
228e548e AB |
629 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
630 | struct msghdr *msg, size_t size) | |
631 | { | |
632 | int err = security_socket_sendmsg(sock, msg, size); | |
633 | ||
634 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
635 | } | |
636 | ||
1da177e4 LT |
637 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
638 | { | |
639 | struct kiocb iocb; | |
640 | struct sock_iocb siocb; | |
641 | int ret; | |
642 | ||
643 | init_sync_kiocb(&iocb, NULL); | |
644 | iocb.private = &siocb; | |
645 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
646 | if (-EIOCBQUEUED == ret) | |
647 | ret = wait_on_sync_kiocb(&iocb); | |
648 | return ret; | |
649 | } | |
c6d409cf | 650 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 651 | |
894dc24c | 652 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
653 | { |
654 | struct kiocb iocb; | |
655 | struct sock_iocb siocb; | |
656 | int ret; | |
657 | ||
658 | init_sync_kiocb(&iocb, NULL); | |
659 | iocb.private = &siocb; | |
660 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
661 | if (-EIOCBQUEUED == ret) | |
662 | ret = wait_on_sync_kiocb(&iocb); | |
663 | return ret; | |
664 | } | |
665 | ||
1da177e4 LT |
666 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
667 | struct kvec *vec, size_t num, size_t size) | |
668 | { | |
669 | mm_segment_t oldfs = get_fs(); | |
670 | int result; | |
671 | ||
672 | set_fs(KERNEL_DS); | |
673 | /* | |
674 | * the following is safe, since for compiler definitions of kvec and | |
675 | * iovec are identical, yielding the same in-core layout and alignment | |
676 | */ | |
89bddce5 | 677 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
678 | msg->msg_iovlen = num; |
679 | result = sock_sendmsg(sock, msg, size); | |
680 | set_fs(oldfs); | |
681 | return result; | |
682 | } | |
c6d409cf | 683 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 684 | |
92f37fd2 ED |
685 | /* |
686 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
687 | */ | |
688 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
689 | struct sk_buff *skb) | |
690 | { | |
20d49473 PO |
691 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
692 | struct timespec ts[3]; | |
693 | int empty = 1; | |
694 | struct skb_shared_hwtstamps *shhwtstamps = | |
695 | skb_hwtstamps(skb); | |
696 | ||
697 | /* Race occurred between timestamp enabling and packet | |
698 | receiving. Fill in the current time for now. */ | |
699 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
700 | __net_timestamp(skb); | |
701 | ||
702 | if (need_software_tstamp) { | |
703 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
704 | struct timeval tv; | |
705 | skb_get_timestamp(skb, &tv); | |
706 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
707 | sizeof(tv), &tv); | |
708 | } else { | |
842509b8 | 709 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 710 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 711 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
712 | } |
713 | } | |
714 | ||
715 | ||
716 | memset(ts, 0, sizeof(ts)); | |
6e94d1ef DB |
717 | if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) && |
718 | ktime_to_timespec_cond(skb->tstamp, ts + 0)) | |
20d49473 | 719 | empty = 0; |
20d49473 PO |
720 | if (shhwtstamps) { |
721 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
6e94d1ef | 722 | ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1)) |
20d49473 PO |
723 | empty = 0; |
724 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
6e94d1ef | 725 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) |
20d49473 | 726 | empty = 0; |
92f37fd2 | 727 | } |
20d49473 PO |
728 | if (!empty) |
729 | put_cmsg(msg, SOL_SOCKET, | |
730 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 731 | } |
7c81fd8b ACM |
732 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
733 | ||
6e3e939f JB |
734 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
735 | struct sk_buff *skb) | |
736 | { | |
737 | int ack; | |
738 | ||
739 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
740 | return; | |
741 | if (!skb->wifi_acked_valid) | |
742 | return; | |
743 | ||
744 | ack = skb->wifi_acked; | |
745 | ||
746 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
747 | } | |
748 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
749 | ||
11165f14 | 750 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
751 | struct sk_buff *skb) | |
3b885787 NH |
752 | { |
753 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
754 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
755 | sizeof(__u32), &skb->dropcount); | |
756 | } | |
757 | ||
767dd033 | 758 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
759 | struct sk_buff *skb) |
760 | { | |
761 | sock_recv_timestamp(msg, sk, skb); | |
762 | sock_recv_drops(msg, sk, skb); | |
763 | } | |
767dd033 | 764 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 765 | |
a2e27255 ACM |
766 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
767 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 768 | { |
1da177e4 LT |
769 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
770 | ||
771 | si->sock = sock; | |
772 | si->scm = NULL; | |
773 | si->msg = msg; | |
774 | si->size = size; | |
775 | si->flags = flags; | |
776 | ||
1da177e4 LT |
777 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
778 | } | |
779 | ||
a2e27255 ACM |
780 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
781 | struct msghdr *msg, size_t size, int flags) | |
782 | { | |
783 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
784 | ||
785 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
786 | } | |
787 | ||
89bddce5 | 788 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
789 | size_t size, int flags) |
790 | { | |
791 | struct kiocb iocb; | |
792 | struct sock_iocb siocb; | |
793 | int ret; | |
794 | ||
89bddce5 | 795 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
796 | iocb.private = &siocb; |
797 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
798 | if (-EIOCBQUEUED == ret) | |
799 | ret = wait_on_sync_kiocb(&iocb); | |
800 | return ret; | |
801 | } | |
c6d409cf | 802 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 803 | |
a2e27255 ACM |
804 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
805 | size_t size, int flags) | |
806 | { | |
807 | struct kiocb iocb; | |
808 | struct sock_iocb siocb; | |
809 | int ret; | |
810 | ||
811 | init_sync_kiocb(&iocb, NULL); | |
812 | iocb.private = &siocb; | |
813 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
814 | if (-EIOCBQUEUED == ret) | |
815 | ret = wait_on_sync_kiocb(&iocb); | |
816 | return ret; | |
817 | } | |
818 | ||
c1249c0a ML |
819 | /** |
820 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
821 | * @sock: The socket to receive the message from | |
822 | * @msg: Received message | |
823 | * @vec: Input s/g array for message data | |
824 | * @num: Size of input s/g array | |
825 | * @size: Number of bytes to read | |
826 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
827 | * | |
828 | * On return the msg structure contains the scatter/gather array passed in the | |
829 | * vec argument. The array is modified so that it consists of the unfilled | |
830 | * portion of the original array. | |
831 | * | |
832 | * The returned value is the total number of bytes received, or an error. | |
833 | */ | |
89bddce5 SH |
834 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
835 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
836 | { |
837 | mm_segment_t oldfs = get_fs(); | |
838 | int result; | |
839 | ||
840 | set_fs(KERNEL_DS); | |
841 | /* | |
842 | * the following is safe, since for compiler definitions of kvec and | |
843 | * iovec are identical, yielding the same in-core layout and alignment | |
844 | */ | |
89bddce5 | 845 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
846 | result = sock_recvmsg(sock, msg, size, flags); |
847 | set_fs(oldfs); | |
848 | return result; | |
849 | } | |
c6d409cf | 850 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 LT |
851 | |
852 | static void sock_aio_dtor(struct kiocb *iocb) | |
853 | { | |
854 | kfree(iocb->private); | |
855 | } | |
856 | ||
ce1d4d3e CH |
857 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
858 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 859 | { |
1da177e4 LT |
860 | struct socket *sock; |
861 | int flags; | |
862 | ||
ce1d4d3e CH |
863 | sock = file->private_data; |
864 | ||
35f9c09f ED |
865 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
866 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
867 | flags |= more; | |
ce1d4d3e | 868 | |
e6949583 | 869 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 870 | } |
1da177e4 | 871 | |
9c55e01c | 872 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 873 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
874 | unsigned int flags) |
875 | { | |
876 | struct socket *sock = file->private_data; | |
877 | ||
997b37da RDC |
878 | if (unlikely(!sock->ops->splice_read)) |
879 | return -EINVAL; | |
880 | ||
9c55e01c JA |
881 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
882 | } | |
883 | ||
ce1d4d3e | 884 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 885 | struct sock_iocb *siocb) |
ce1d4d3e CH |
886 | { |
887 | if (!is_sync_kiocb(iocb)) { | |
888 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
889 | if (!siocb) | |
890 | return NULL; | |
1da177e4 LT |
891 | iocb->ki_dtor = sock_aio_dtor; |
892 | } | |
1da177e4 | 893 | |
ce1d4d3e | 894 | siocb->kiocb = iocb; |
ce1d4d3e CH |
895 | iocb->private = siocb; |
896 | return siocb; | |
1da177e4 LT |
897 | } |
898 | ||
ce1d4d3e | 899 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
900 | struct file *file, const struct iovec *iov, |
901 | unsigned long nr_segs) | |
ce1d4d3e CH |
902 | { |
903 | struct socket *sock = file->private_data; | |
904 | size_t size = 0; | |
905 | int i; | |
1da177e4 | 906 | |
89bddce5 SH |
907 | for (i = 0; i < nr_segs; i++) |
908 | size += iov[i].iov_len; | |
1da177e4 | 909 | |
ce1d4d3e CH |
910 | msg->msg_name = NULL; |
911 | msg->msg_namelen = 0; | |
912 | msg->msg_control = NULL; | |
913 | msg->msg_controllen = 0; | |
89bddce5 | 914 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
915 | msg->msg_iovlen = nr_segs; |
916 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
917 | ||
918 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
919 | } | |
920 | ||
027445c3 BP |
921 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
922 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
923 | { |
924 | struct sock_iocb siocb, *x; | |
925 | ||
1da177e4 LT |
926 | if (pos != 0) |
927 | return -ESPIPE; | |
027445c3 BP |
928 | |
929 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
930 | return 0; |
931 | ||
027445c3 BP |
932 | |
933 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
934 | if (!x) |
935 | return -ENOMEM; | |
027445c3 | 936 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
937 | } |
938 | ||
ce1d4d3e | 939 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
940 | struct file *file, const struct iovec *iov, |
941 | unsigned long nr_segs) | |
1da177e4 | 942 | { |
ce1d4d3e CH |
943 | struct socket *sock = file->private_data; |
944 | size_t size = 0; | |
945 | int i; | |
1da177e4 | 946 | |
89bddce5 SH |
947 | for (i = 0; i < nr_segs; i++) |
948 | size += iov[i].iov_len; | |
1da177e4 | 949 | |
ce1d4d3e CH |
950 | msg->msg_name = NULL; |
951 | msg->msg_namelen = 0; | |
952 | msg->msg_control = NULL; | |
953 | msg->msg_controllen = 0; | |
89bddce5 | 954 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
955 | msg->msg_iovlen = nr_segs; |
956 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
957 | if (sock->type == SOCK_SEQPACKET) | |
958 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 959 | |
ce1d4d3e | 960 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
961 | } |
962 | ||
027445c3 BP |
963 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
964 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
965 | { |
966 | struct sock_iocb siocb, *x; | |
1da177e4 | 967 | |
ce1d4d3e CH |
968 | if (pos != 0) |
969 | return -ESPIPE; | |
027445c3 | 970 | |
027445c3 | 971 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
972 | if (!x) |
973 | return -ENOMEM; | |
1da177e4 | 974 | |
027445c3 | 975 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
976 | } |
977 | ||
1da177e4 LT |
978 | /* |
979 | * Atomic setting of ioctl hooks to avoid race | |
980 | * with module unload. | |
981 | */ | |
982 | ||
4a3e2f71 | 983 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 984 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 985 | |
881d966b | 986 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 987 | { |
4a3e2f71 | 988 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 989 | br_ioctl_hook = hook; |
4a3e2f71 | 990 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
991 | } |
992 | EXPORT_SYMBOL(brioctl_set); | |
993 | ||
4a3e2f71 | 994 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 995 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 996 | |
881d966b | 997 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 998 | { |
4a3e2f71 | 999 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1000 | vlan_ioctl_hook = hook; |
4a3e2f71 | 1001 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
1002 | } |
1003 | EXPORT_SYMBOL(vlan_ioctl_set); | |
1004 | ||
4a3e2f71 | 1005 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 1006 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 1007 | |
89bddce5 | 1008 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 1009 | { |
4a3e2f71 | 1010 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 1011 | dlci_ioctl_hook = hook; |
4a3e2f71 | 1012 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1013 | } |
1014 | EXPORT_SYMBOL(dlci_ioctl_set); | |
1015 | ||
6b96018b AB |
1016 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
1017 | unsigned int cmd, unsigned long arg) | |
1018 | { | |
1019 | int err; | |
1020 | void __user *argp = (void __user *)arg; | |
1021 | ||
1022 | err = sock->ops->ioctl(sock, cmd, arg); | |
1023 | ||
1024 | /* | |
1025 | * If this ioctl is unknown try to hand it down | |
1026 | * to the NIC driver. | |
1027 | */ | |
1028 | if (err == -ENOIOCTLCMD) | |
1029 | err = dev_ioctl(net, cmd, argp); | |
1030 | ||
1031 | return err; | |
1032 | } | |
1033 | ||
1da177e4 LT |
1034 | /* |
1035 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1036 | * what to do with it - that's up to the protocol still. | |
1037 | */ | |
1038 | ||
1039 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1040 | { | |
1041 | struct socket *sock; | |
881d966b | 1042 | struct sock *sk; |
1da177e4 LT |
1043 | void __user *argp = (void __user *)arg; |
1044 | int pid, err; | |
881d966b | 1045 | struct net *net; |
1da177e4 | 1046 | |
b69aee04 | 1047 | sock = file->private_data; |
881d966b | 1048 | sk = sock->sk; |
3b1e0a65 | 1049 | net = sock_net(sk); |
1da177e4 | 1050 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1051 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1052 | } else |
3d23e349 | 1053 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1054 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1055 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1056 | } else |
3d23e349 | 1057 | #endif |
89bddce5 | 1058 | switch (cmd) { |
1da177e4 LT |
1059 | case FIOSETOWN: |
1060 | case SIOCSPGRP: | |
1061 | err = -EFAULT; | |
1062 | if (get_user(pid, (int __user *)argp)) | |
1063 | break; | |
1064 | err = f_setown(sock->file, pid, 1); | |
1065 | break; | |
1066 | case FIOGETOWN: | |
1067 | case SIOCGPGRP: | |
609d7fa9 | 1068 | err = put_user(f_getown(sock->file), |
89bddce5 | 1069 | (int __user *)argp); |
1da177e4 LT |
1070 | break; |
1071 | case SIOCGIFBR: | |
1072 | case SIOCSIFBR: | |
1073 | case SIOCBRADDBR: | |
1074 | case SIOCBRDELBR: | |
1075 | err = -ENOPKG; | |
1076 | if (!br_ioctl_hook) | |
1077 | request_module("bridge"); | |
1078 | ||
4a3e2f71 | 1079 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1080 | if (br_ioctl_hook) |
881d966b | 1081 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1082 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1083 | break; |
1084 | case SIOCGIFVLAN: | |
1085 | case SIOCSIFVLAN: | |
1086 | err = -ENOPKG; | |
1087 | if (!vlan_ioctl_hook) | |
1088 | request_module("8021q"); | |
1089 | ||
4a3e2f71 | 1090 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1091 | if (vlan_ioctl_hook) |
881d966b | 1092 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1093 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1094 | break; |
1da177e4 LT |
1095 | case SIOCADDDLCI: |
1096 | case SIOCDELDLCI: | |
1097 | err = -ENOPKG; | |
1098 | if (!dlci_ioctl_hook) | |
1099 | request_module("dlci"); | |
1100 | ||
7512cbf6 PE |
1101 | mutex_lock(&dlci_ioctl_mutex); |
1102 | if (dlci_ioctl_hook) | |
1da177e4 | 1103 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1104 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1105 | break; |
1106 | default: | |
6b96018b | 1107 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1108 | break; |
89bddce5 | 1109 | } |
1da177e4 LT |
1110 | return err; |
1111 | } | |
1112 | ||
1113 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1114 | { | |
1115 | int err; | |
1116 | struct socket *sock = NULL; | |
89bddce5 | 1117 | |
1da177e4 LT |
1118 | err = security_socket_create(family, type, protocol, 1); |
1119 | if (err) | |
1120 | goto out; | |
1121 | ||
1122 | sock = sock_alloc(); | |
1123 | if (!sock) { | |
1124 | err = -ENOMEM; | |
1125 | goto out; | |
1126 | } | |
1127 | ||
1da177e4 | 1128 | sock->type = type; |
7420ed23 VY |
1129 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1130 | if (err) | |
1131 | goto out_release; | |
1132 | ||
1da177e4 LT |
1133 | out: |
1134 | *res = sock; | |
1135 | return err; | |
7420ed23 VY |
1136 | out_release: |
1137 | sock_release(sock); | |
1138 | sock = NULL; | |
1139 | goto out; | |
1da177e4 | 1140 | } |
c6d409cf | 1141 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1142 | |
1143 | /* No kernel lock held - perfect */ | |
89bddce5 | 1144 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1145 | { |
1146 | struct socket *sock; | |
1147 | ||
1148 | /* | |
89bddce5 | 1149 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1150 | */ |
b69aee04 | 1151 | sock = file->private_data; |
1da177e4 LT |
1152 | return sock->ops->poll(file, sock, wait); |
1153 | } | |
1154 | ||
89bddce5 | 1155 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1156 | { |
b69aee04 | 1157 | struct socket *sock = file->private_data; |
1da177e4 LT |
1158 | |
1159 | return sock->ops->mmap(file, sock, vma); | |
1160 | } | |
1161 | ||
20380731 | 1162 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1163 | { |
1da177e4 LT |
1164 | sock_release(SOCKET_I(inode)); |
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | /* | |
1169 | * Update the socket async list | |
1170 | * | |
1171 | * Fasync_list locking strategy. | |
1172 | * | |
1173 | * 1. fasync_list is modified only under process context socket lock | |
1174 | * i.e. under semaphore. | |
1175 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1176 | * or under socket lock |
1da177e4 LT |
1177 | */ |
1178 | ||
1179 | static int sock_fasync(int fd, struct file *filp, int on) | |
1180 | { | |
989a2979 ED |
1181 | struct socket *sock = filp->private_data; |
1182 | struct sock *sk = sock->sk; | |
eaefd110 | 1183 | struct socket_wq *wq; |
1da177e4 | 1184 | |
989a2979 | 1185 | if (sk == NULL) |
1da177e4 | 1186 | return -EINVAL; |
1da177e4 LT |
1187 | |
1188 | lock_sock(sk); | |
eaefd110 ED |
1189 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1190 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1191 | |
eaefd110 | 1192 | if (!wq->fasync_list) |
989a2979 ED |
1193 | sock_reset_flag(sk, SOCK_FASYNC); |
1194 | else | |
bcdce719 | 1195 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1196 | |
989a2979 | 1197 | release_sock(sk); |
1da177e4 LT |
1198 | return 0; |
1199 | } | |
1200 | ||
43815482 | 1201 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1202 | |
1203 | int sock_wake_async(struct socket *sock, int how, int band) | |
1204 | { | |
43815482 ED |
1205 | struct socket_wq *wq; |
1206 | ||
1207 | if (!sock) | |
1208 | return -1; | |
1209 | rcu_read_lock(); | |
1210 | wq = rcu_dereference(sock->wq); | |
1211 | if (!wq || !wq->fasync_list) { | |
1212 | rcu_read_unlock(); | |
1da177e4 | 1213 | return -1; |
43815482 | 1214 | } |
89bddce5 | 1215 | switch (how) { |
8d8ad9d7 | 1216 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1217 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1218 | break; | |
1219 | goto call_kill; | |
8d8ad9d7 | 1220 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1221 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1222 | break; | |
1223 | /* fall through */ | |
8d8ad9d7 | 1224 | case SOCK_WAKE_IO: |
89bddce5 | 1225 | call_kill: |
43815482 | 1226 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1227 | break; |
8d8ad9d7 | 1228 | case SOCK_WAKE_URG: |
43815482 | 1229 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1230 | } |
43815482 | 1231 | rcu_read_unlock(); |
1da177e4 LT |
1232 | return 0; |
1233 | } | |
c6d409cf | 1234 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1235 | |
721db93a | 1236 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1237 | struct socket **res, int kern) |
1da177e4 LT |
1238 | { |
1239 | int err; | |
1240 | struct socket *sock; | |
55737fda | 1241 | const struct net_proto_family *pf; |
1da177e4 LT |
1242 | |
1243 | /* | |
89bddce5 | 1244 | * Check protocol is in range |
1da177e4 LT |
1245 | */ |
1246 | if (family < 0 || family >= NPROTO) | |
1247 | return -EAFNOSUPPORT; | |
1248 | if (type < 0 || type >= SOCK_MAX) | |
1249 | return -EINVAL; | |
1250 | ||
1251 | /* Compatibility. | |
1252 | ||
1253 | This uglymoron is moved from INET layer to here to avoid | |
1254 | deadlock in module load. | |
1255 | */ | |
1256 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1257 | static int warned; |
1da177e4 LT |
1258 | if (!warned) { |
1259 | warned = 1; | |
89bddce5 SH |
1260 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1261 | current->comm); | |
1da177e4 LT |
1262 | } |
1263 | family = PF_PACKET; | |
1264 | } | |
1265 | ||
1266 | err = security_socket_create(family, type, protocol, kern); | |
1267 | if (err) | |
1268 | return err; | |
89bddce5 | 1269 | |
55737fda SH |
1270 | /* |
1271 | * Allocate the socket and allow the family to set things up. if | |
1272 | * the protocol is 0, the family is instructed to select an appropriate | |
1273 | * default. | |
1274 | */ | |
1275 | sock = sock_alloc(); | |
1276 | if (!sock) { | |
e87cc472 | 1277 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1278 | return -ENFILE; /* Not exactly a match, but its the |
1279 | closest posix thing */ | |
1280 | } | |
1281 | ||
1282 | sock->type = type; | |
1283 | ||
95a5afca | 1284 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1285 | /* Attempt to load a protocol module if the find failed. |
1286 | * | |
1287 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1288 | * requested real, full-featured networking support upon configuration. |
1289 | * Otherwise module support will break! | |
1290 | */ | |
190683a9 | 1291 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1292 | request_module("net-pf-%d", family); |
1da177e4 LT |
1293 | #endif |
1294 | ||
55737fda SH |
1295 | rcu_read_lock(); |
1296 | pf = rcu_dereference(net_families[family]); | |
1297 | err = -EAFNOSUPPORT; | |
1298 | if (!pf) | |
1299 | goto out_release; | |
1da177e4 LT |
1300 | |
1301 | /* | |
1302 | * We will call the ->create function, that possibly is in a loadable | |
1303 | * module, so we have to bump that loadable module refcnt first. | |
1304 | */ | |
55737fda | 1305 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1306 | goto out_release; |
1307 | ||
55737fda SH |
1308 | /* Now protected by module ref count */ |
1309 | rcu_read_unlock(); | |
1310 | ||
3f378b68 | 1311 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1312 | if (err < 0) |
1da177e4 | 1313 | goto out_module_put; |
a79af59e | 1314 | |
1da177e4 LT |
1315 | /* |
1316 | * Now to bump the refcnt of the [loadable] module that owns this | |
1317 | * socket at sock_release time we decrement its refcnt. | |
1318 | */ | |
55737fda SH |
1319 | if (!try_module_get(sock->ops->owner)) |
1320 | goto out_module_busy; | |
1321 | ||
1da177e4 LT |
1322 | /* |
1323 | * Now that we're done with the ->create function, the [loadable] | |
1324 | * module can have its refcnt decremented | |
1325 | */ | |
55737fda | 1326 | module_put(pf->owner); |
7420ed23 VY |
1327 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1328 | if (err) | |
3b185525 | 1329 | goto out_sock_release; |
55737fda | 1330 | *res = sock; |
1da177e4 | 1331 | |
55737fda SH |
1332 | return 0; |
1333 | ||
1334 | out_module_busy: | |
1335 | err = -EAFNOSUPPORT; | |
1da177e4 | 1336 | out_module_put: |
55737fda SH |
1337 | sock->ops = NULL; |
1338 | module_put(pf->owner); | |
1339 | out_sock_release: | |
1da177e4 | 1340 | sock_release(sock); |
55737fda SH |
1341 | return err; |
1342 | ||
1343 | out_release: | |
1344 | rcu_read_unlock(); | |
1345 | goto out_sock_release; | |
1da177e4 | 1346 | } |
721db93a | 1347 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1348 | |
1349 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1350 | { | |
1b8d7ae4 | 1351 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1352 | } |
c6d409cf | 1353 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1354 | |
1355 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1356 | { | |
1b8d7ae4 | 1357 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1358 | } |
c6d409cf | 1359 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1360 | |
3e0fa65f | 1361 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1362 | { |
1363 | int retval; | |
1364 | struct socket *sock; | |
a677a039 UD |
1365 | int flags; |
1366 | ||
e38b36f3 UD |
1367 | /* Check the SOCK_* constants for consistency. */ |
1368 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1369 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1370 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1371 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1372 | ||
a677a039 | 1373 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1374 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1375 | return -EINVAL; |
1376 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1377 | |
aaca0bdc UD |
1378 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1379 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1380 | ||
1da177e4 LT |
1381 | retval = sock_create(family, type, protocol, &sock); |
1382 | if (retval < 0) | |
1383 | goto out; | |
1384 | ||
77d27200 | 1385 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1386 | if (retval < 0) |
1387 | goto out_release; | |
1388 | ||
1389 | out: | |
1390 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1391 | return retval; | |
1392 | ||
1393 | out_release: | |
1394 | sock_release(sock); | |
1395 | return retval; | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Create a pair of connected sockets. | |
1400 | */ | |
1401 | ||
3e0fa65f HC |
1402 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1403 | int __user *, usockvec) | |
1da177e4 LT |
1404 | { |
1405 | struct socket *sock1, *sock2; | |
1406 | int fd1, fd2, err; | |
db349509 | 1407 | struct file *newfile1, *newfile2; |
a677a039 UD |
1408 | int flags; |
1409 | ||
1410 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1411 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1412 | return -EINVAL; |
1413 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1414 | |
aaca0bdc UD |
1415 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1416 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1417 | ||
1da177e4 LT |
1418 | /* |
1419 | * Obtain the first socket and check if the underlying protocol | |
1420 | * supports the socketpair call. | |
1421 | */ | |
1422 | ||
1423 | err = sock_create(family, type, protocol, &sock1); | |
1424 | if (err < 0) | |
1425 | goto out; | |
1426 | ||
1427 | err = sock_create(family, type, protocol, &sock2); | |
1428 | if (err < 0) | |
1429 | goto out_release_1; | |
1430 | ||
1431 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1432 | if (err < 0) |
1da177e4 LT |
1433 | goto out_release_both; |
1434 | ||
28407630 | 1435 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1436 | if (unlikely(fd1 < 0)) { |
1437 | err = fd1; | |
db349509 | 1438 | goto out_release_both; |
bf3c23d1 | 1439 | } |
28407630 | 1440 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1441 | if (unlikely(fd2 < 0)) { |
1442 | err = fd2; | |
28407630 AV |
1443 | put_unused_fd(fd1); |
1444 | goto out_release_both; | |
1445 | } | |
1446 | ||
aab174f0 | 1447 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
28407630 AV |
1448 | if (unlikely(IS_ERR(newfile1))) { |
1449 | err = PTR_ERR(newfile1); | |
1450 | put_unused_fd(fd1); | |
1451 | put_unused_fd(fd2); | |
1452 | goto out_release_both; | |
1453 | } | |
1454 | ||
aab174f0 | 1455 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1456 | if (IS_ERR(newfile2)) { |
1457 | err = PTR_ERR(newfile2); | |
198de4d7 AV |
1458 | fput(newfile1); |
1459 | put_unused_fd(fd1); | |
28407630 | 1460 | put_unused_fd(fd2); |
198de4d7 AV |
1461 | sock_release(sock2); |
1462 | goto out; | |
db349509 AV |
1463 | } |
1464 | ||
157cf649 | 1465 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1466 | fd_install(fd1, newfile1); |
1467 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1468 | /* fd1 and fd2 may be already another descriptors. |
1469 | * Not kernel problem. | |
1470 | */ | |
1471 | ||
89bddce5 | 1472 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1473 | if (!err) |
1474 | err = put_user(fd2, &usockvec[1]); | |
1475 | if (!err) | |
1476 | return 0; | |
1477 | ||
1478 | sys_close(fd2); | |
1479 | sys_close(fd1); | |
1480 | return err; | |
1481 | ||
1da177e4 | 1482 | out_release_both: |
89bddce5 | 1483 | sock_release(sock2); |
1da177e4 | 1484 | out_release_1: |
89bddce5 | 1485 | sock_release(sock1); |
1da177e4 LT |
1486 | out: |
1487 | return err; | |
1488 | } | |
1489 | ||
1da177e4 LT |
1490 | /* |
1491 | * Bind a name to a socket. Nothing much to do here since it's | |
1492 | * the protocol's responsibility to handle the local address. | |
1493 | * | |
1494 | * We move the socket address to kernel space before we call | |
1495 | * the protocol layer (having also checked the address is ok). | |
1496 | */ | |
1497 | ||
20f37034 | 1498 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1499 | { |
1500 | struct socket *sock; | |
230b1839 | 1501 | struct sockaddr_storage address; |
6cb153ca | 1502 | int err, fput_needed; |
1da177e4 | 1503 | |
89bddce5 | 1504 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1505 | if (sock) { |
43db362d | 1506 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1507 | if (err >= 0) { |
1508 | err = security_socket_bind(sock, | |
230b1839 | 1509 | (struct sockaddr *)&address, |
89bddce5 | 1510 | addrlen); |
6cb153ca BL |
1511 | if (!err) |
1512 | err = sock->ops->bind(sock, | |
89bddce5 | 1513 | (struct sockaddr *) |
230b1839 | 1514 | &address, addrlen); |
1da177e4 | 1515 | } |
6cb153ca | 1516 | fput_light(sock->file, fput_needed); |
89bddce5 | 1517 | } |
1da177e4 LT |
1518 | return err; |
1519 | } | |
1520 | ||
1da177e4 LT |
1521 | /* |
1522 | * Perform a listen. Basically, we allow the protocol to do anything | |
1523 | * necessary for a listen, and if that works, we mark the socket as | |
1524 | * ready for listening. | |
1525 | */ | |
1526 | ||
3e0fa65f | 1527 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1528 | { |
1529 | struct socket *sock; | |
6cb153ca | 1530 | int err, fput_needed; |
b8e1f9b5 | 1531 | int somaxconn; |
89bddce5 SH |
1532 | |
1533 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1534 | if (sock) { | |
8efa6e93 | 1535 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1536 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1537 | backlog = somaxconn; |
1da177e4 LT |
1538 | |
1539 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1540 | if (!err) |
1541 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1542 | |
6cb153ca | 1543 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1544 | } |
1545 | return err; | |
1546 | } | |
1547 | ||
1da177e4 LT |
1548 | /* |
1549 | * For accept, we attempt to create a new socket, set up the link | |
1550 | * with the client, wake up the client, then return the new | |
1551 | * connected fd. We collect the address of the connector in kernel | |
1552 | * space and move it to user at the very end. This is unclean because | |
1553 | * we open the socket then return an error. | |
1554 | * | |
1555 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1556 | * status to recvmsg. We need to add that support in a way thats | |
1557 | * clean when we restucture accept also. | |
1558 | */ | |
1559 | ||
20f37034 HC |
1560 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1561 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1562 | { |
1563 | struct socket *sock, *newsock; | |
39d8c1b6 | 1564 | struct file *newfile; |
6cb153ca | 1565 | int err, len, newfd, fput_needed; |
230b1839 | 1566 | struct sockaddr_storage address; |
1da177e4 | 1567 | |
77d27200 | 1568 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1569 | return -EINVAL; |
1570 | ||
1571 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1572 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1573 | ||
6cb153ca | 1574 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1575 | if (!sock) |
1576 | goto out; | |
1577 | ||
1578 | err = -ENFILE; | |
c6d409cf ED |
1579 | newsock = sock_alloc(); |
1580 | if (!newsock) | |
1da177e4 LT |
1581 | goto out_put; |
1582 | ||
1583 | newsock->type = sock->type; | |
1584 | newsock->ops = sock->ops; | |
1585 | ||
1da177e4 LT |
1586 | /* |
1587 | * We don't need try_module_get here, as the listening socket (sock) | |
1588 | * has the protocol module (sock->ops->owner) held. | |
1589 | */ | |
1590 | __module_get(newsock->ops->owner); | |
1591 | ||
28407630 | 1592 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1593 | if (unlikely(newfd < 0)) { |
1594 | err = newfd; | |
9a1875e6 DM |
1595 | sock_release(newsock); |
1596 | goto out_put; | |
39d8c1b6 | 1597 | } |
aab174f0 | 1598 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
28407630 AV |
1599 | if (unlikely(IS_ERR(newfile))) { |
1600 | err = PTR_ERR(newfile); | |
1601 | put_unused_fd(newfd); | |
1602 | sock_release(newsock); | |
1603 | goto out_put; | |
1604 | } | |
39d8c1b6 | 1605 | |
a79af59e FF |
1606 | err = security_socket_accept(sock, newsock); |
1607 | if (err) | |
39d8c1b6 | 1608 | goto out_fd; |
a79af59e | 1609 | |
1da177e4 LT |
1610 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1611 | if (err < 0) | |
39d8c1b6 | 1612 | goto out_fd; |
1da177e4 LT |
1613 | |
1614 | if (upeer_sockaddr) { | |
230b1839 | 1615 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1616 | &len, 2) < 0) { |
1da177e4 | 1617 | err = -ECONNABORTED; |
39d8c1b6 | 1618 | goto out_fd; |
1da177e4 | 1619 | } |
43db362d | 1620 | err = move_addr_to_user(&address, |
230b1839 | 1621 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1622 | if (err < 0) |
39d8c1b6 | 1623 | goto out_fd; |
1da177e4 LT |
1624 | } |
1625 | ||
1626 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1627 | ||
39d8c1b6 DM |
1628 | fd_install(newfd, newfile); |
1629 | err = newfd; | |
1da177e4 | 1630 | |
1da177e4 | 1631 | out_put: |
6cb153ca | 1632 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1633 | out: |
1634 | return err; | |
39d8c1b6 | 1635 | out_fd: |
9606a216 | 1636 | fput(newfile); |
39d8c1b6 | 1637 | put_unused_fd(newfd); |
1da177e4 LT |
1638 | goto out_put; |
1639 | } | |
1640 | ||
20f37034 HC |
1641 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1642 | int __user *, upeer_addrlen) | |
aaca0bdc | 1643 | { |
de11defe | 1644 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1645 | } |
1646 | ||
1da177e4 LT |
1647 | /* |
1648 | * Attempt to connect to a socket with the server address. The address | |
1649 | * is in user space so we verify it is OK and move it to kernel space. | |
1650 | * | |
1651 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1652 | * break bindings | |
1653 | * | |
1654 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1655 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1656 | * include the -EINPROGRESS status for such sockets. | |
1657 | */ | |
1658 | ||
20f37034 HC |
1659 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1660 | int, addrlen) | |
1da177e4 LT |
1661 | { |
1662 | struct socket *sock; | |
230b1839 | 1663 | struct sockaddr_storage address; |
6cb153ca | 1664 | int err, fput_needed; |
1da177e4 | 1665 | |
6cb153ca | 1666 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1667 | if (!sock) |
1668 | goto out; | |
43db362d | 1669 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1670 | if (err < 0) |
1671 | goto out_put; | |
1672 | ||
89bddce5 | 1673 | err = |
230b1839 | 1674 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1675 | if (err) |
1676 | goto out_put; | |
1677 | ||
230b1839 | 1678 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1679 | sock->file->f_flags); |
1680 | out_put: | |
6cb153ca | 1681 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1682 | out: |
1683 | return err; | |
1684 | } | |
1685 | ||
1686 | /* | |
1687 | * Get the local address ('name') of a socket object. Move the obtained | |
1688 | * name to user space. | |
1689 | */ | |
1690 | ||
20f37034 HC |
1691 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1692 | int __user *, usockaddr_len) | |
1da177e4 LT |
1693 | { |
1694 | struct socket *sock; | |
230b1839 | 1695 | struct sockaddr_storage address; |
6cb153ca | 1696 | int len, err, fput_needed; |
89bddce5 | 1697 | |
6cb153ca | 1698 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1699 | if (!sock) |
1700 | goto out; | |
1701 | ||
1702 | err = security_socket_getsockname(sock); | |
1703 | if (err) | |
1704 | goto out_put; | |
1705 | ||
230b1839 | 1706 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1707 | if (err) |
1708 | goto out_put; | |
43db362d | 1709 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1710 | |
1711 | out_put: | |
6cb153ca | 1712 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1713 | out: |
1714 | return err; | |
1715 | } | |
1716 | ||
1717 | /* | |
1718 | * Get the remote address ('name') of a socket object. Move the obtained | |
1719 | * name to user space. | |
1720 | */ | |
1721 | ||
20f37034 HC |
1722 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1723 | int __user *, usockaddr_len) | |
1da177e4 LT |
1724 | { |
1725 | struct socket *sock; | |
230b1839 | 1726 | struct sockaddr_storage address; |
6cb153ca | 1727 | int len, err, fput_needed; |
1da177e4 | 1728 | |
89bddce5 SH |
1729 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1730 | if (sock != NULL) { | |
1da177e4 LT |
1731 | err = security_socket_getpeername(sock); |
1732 | if (err) { | |
6cb153ca | 1733 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1734 | return err; |
1735 | } | |
1736 | ||
89bddce5 | 1737 | err = |
230b1839 | 1738 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1739 | 1); |
1da177e4 | 1740 | if (!err) |
43db362d | 1741 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1742 | usockaddr_len); |
6cb153ca | 1743 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1744 | } |
1745 | return err; | |
1746 | } | |
1747 | ||
1748 | /* | |
1749 | * Send a datagram to a given address. We move the address into kernel | |
1750 | * space and check the user space data area is readable before invoking | |
1751 | * the protocol. | |
1752 | */ | |
1753 | ||
3e0fa65f | 1754 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1755 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1756 | int, addr_len) |
1da177e4 LT |
1757 | { |
1758 | struct socket *sock; | |
230b1839 | 1759 | struct sockaddr_storage address; |
1da177e4 LT |
1760 | int err; |
1761 | struct msghdr msg; | |
1762 | struct iovec iov; | |
6cb153ca | 1763 | int fput_needed; |
6cb153ca | 1764 | |
253eacc0 LT |
1765 | if (len > INT_MAX) |
1766 | len = INT_MAX; | |
de0fa95c PE |
1767 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1768 | if (!sock) | |
4387ff75 | 1769 | goto out; |
6cb153ca | 1770 | |
89bddce5 SH |
1771 | iov.iov_base = buff; |
1772 | iov.iov_len = len; | |
1773 | msg.msg_name = NULL; | |
1774 | msg.msg_iov = &iov; | |
1775 | msg.msg_iovlen = 1; | |
1776 | msg.msg_control = NULL; | |
1777 | msg.msg_controllen = 0; | |
1778 | msg.msg_namelen = 0; | |
6cb153ca | 1779 | if (addr) { |
43db362d | 1780 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1781 | if (err < 0) |
1782 | goto out_put; | |
230b1839 | 1783 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1784 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1785 | } |
1786 | if (sock->file->f_flags & O_NONBLOCK) | |
1787 | flags |= MSG_DONTWAIT; | |
1788 | msg.msg_flags = flags; | |
1789 | err = sock_sendmsg(sock, &msg, len); | |
1790 | ||
89bddce5 | 1791 | out_put: |
de0fa95c | 1792 | fput_light(sock->file, fput_needed); |
4387ff75 | 1793 | out: |
1da177e4 LT |
1794 | return err; |
1795 | } | |
1796 | ||
1797 | /* | |
89bddce5 | 1798 | * Send a datagram down a socket. |
1da177e4 LT |
1799 | */ |
1800 | ||
3e0fa65f | 1801 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1802 | unsigned int, flags) |
1da177e4 LT |
1803 | { |
1804 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1805 | } | |
1806 | ||
1807 | /* | |
89bddce5 | 1808 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1809 | * sender. We verify the buffers are writable and if needed move the |
1810 | * sender address from kernel to user space. | |
1811 | */ | |
1812 | ||
3e0fa65f | 1813 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1814 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1815 | int __user *, addr_len) |
1da177e4 LT |
1816 | { |
1817 | struct socket *sock; | |
1818 | struct iovec iov; | |
1819 | struct msghdr msg; | |
230b1839 | 1820 | struct sockaddr_storage address; |
89bddce5 | 1821 | int err, err2; |
6cb153ca BL |
1822 | int fput_needed; |
1823 | ||
253eacc0 LT |
1824 | if (size > INT_MAX) |
1825 | size = INT_MAX; | |
de0fa95c | 1826 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1827 | if (!sock) |
de0fa95c | 1828 | goto out; |
1da177e4 | 1829 | |
89bddce5 SH |
1830 | msg.msg_control = NULL; |
1831 | msg.msg_controllen = 0; | |
1832 | msg.msg_iovlen = 1; | |
1833 | msg.msg_iov = &iov; | |
1834 | iov.iov_len = size; | |
1835 | iov.iov_base = ubuf; | |
2f73d7fd HFS |
1836 | /* Save some cycles and don't copy the address if not needed */ |
1837 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1838 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1839 | msg.msg_namelen = 0; | |
1da177e4 LT |
1840 | if (sock->file->f_flags & O_NONBLOCK) |
1841 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1842 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1843 | |
89bddce5 | 1844 | if (err >= 0 && addr != NULL) { |
43db362d | 1845 | err2 = move_addr_to_user(&address, |
230b1839 | 1846 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1847 | if (err2 < 0) |
1848 | err = err2; | |
1da177e4 | 1849 | } |
de0fa95c PE |
1850 | |
1851 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1852 | out: |
1da177e4 LT |
1853 | return err; |
1854 | } | |
1855 | ||
1856 | /* | |
89bddce5 | 1857 | * Receive a datagram from a socket. |
1da177e4 LT |
1858 | */ |
1859 | ||
89bddce5 | 1860 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
95c96174 | 1861 | unsigned int flags) |
1da177e4 LT |
1862 | { |
1863 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1864 | } | |
1865 | ||
1866 | /* | |
1867 | * Set a socket option. Because we don't know the option lengths we have | |
1868 | * to pass the user mode parameter for the protocols to sort out. | |
1869 | */ | |
1870 | ||
20f37034 HC |
1871 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1872 | char __user *, optval, int, optlen) | |
1da177e4 | 1873 | { |
6cb153ca | 1874 | int err, fput_needed; |
1da177e4 LT |
1875 | struct socket *sock; |
1876 | ||
1877 | if (optlen < 0) | |
1878 | return -EINVAL; | |
89bddce5 SH |
1879 | |
1880 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1881 | if (sock != NULL) { | |
1882 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1883 | if (err) |
1884 | goto out_put; | |
1da177e4 LT |
1885 | |
1886 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1887 | err = |
1888 | sock_setsockopt(sock, level, optname, optval, | |
1889 | optlen); | |
1da177e4 | 1890 | else |
89bddce5 SH |
1891 | err = |
1892 | sock->ops->setsockopt(sock, level, optname, optval, | |
1893 | optlen); | |
6cb153ca BL |
1894 | out_put: |
1895 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1896 | } |
1897 | return err; | |
1898 | } | |
1899 | ||
1900 | /* | |
1901 | * Get a socket option. Because we don't know the option lengths we have | |
1902 | * to pass a user mode parameter for the protocols to sort out. | |
1903 | */ | |
1904 | ||
20f37034 HC |
1905 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1906 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1907 | { |
6cb153ca | 1908 | int err, fput_needed; |
1da177e4 LT |
1909 | struct socket *sock; |
1910 | ||
89bddce5 SH |
1911 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1912 | if (sock != NULL) { | |
6cb153ca BL |
1913 | err = security_socket_getsockopt(sock, level, optname); |
1914 | if (err) | |
1915 | goto out_put; | |
1da177e4 LT |
1916 | |
1917 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1918 | err = |
1919 | sock_getsockopt(sock, level, optname, optval, | |
1920 | optlen); | |
1da177e4 | 1921 | else |
89bddce5 SH |
1922 | err = |
1923 | sock->ops->getsockopt(sock, level, optname, optval, | |
1924 | optlen); | |
6cb153ca BL |
1925 | out_put: |
1926 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1927 | } |
1928 | return err; | |
1929 | } | |
1930 | ||
1da177e4 LT |
1931 | /* |
1932 | * Shutdown a socket. | |
1933 | */ | |
1934 | ||
754fe8d2 | 1935 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1936 | { |
6cb153ca | 1937 | int err, fput_needed; |
1da177e4 LT |
1938 | struct socket *sock; |
1939 | ||
89bddce5 SH |
1940 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1941 | if (sock != NULL) { | |
1da177e4 | 1942 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1943 | if (!err) |
1944 | err = sock->ops->shutdown(sock, how); | |
1945 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1946 | } |
1947 | return err; | |
1948 | } | |
1949 | ||
89bddce5 | 1950 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1951 | * fields which are the same type (int / unsigned) on our platforms. |
1952 | */ | |
1953 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1954 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1955 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1956 | ||
c71d8ebe TH |
1957 | struct used_address { |
1958 | struct sockaddr_storage name; | |
1959 | unsigned int name_len; | |
1960 | }; | |
1961 | ||
2e8d97ab DC |
1962 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
1963 | struct msghdr __user *umsg) | |
1964 | { | |
1965 | if (copy_from_user(kmsg, umsg, sizeof(struct msghdr))) | |
1966 | return -EFAULT; | |
29a322f4 ML |
1967 | |
1968 | if (kmsg->msg_namelen < 0) | |
1969 | return -EINVAL; | |
1970 | ||
2e8d97ab | 1971 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
ed47bba2 | 1972 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
2e8d97ab DC |
1973 | return 0; |
1974 | } | |
1975 | ||
a7526eb5 | 1976 | static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 1977 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1978 | struct used_address *used_address) |
1da177e4 | 1979 | { |
89bddce5 SH |
1980 | struct compat_msghdr __user *msg_compat = |
1981 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1982 | struct sockaddr_storage address; |
1da177e4 | 1983 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1984 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1985 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1986 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 1987 | unsigned char *ctl_buf = ctl; |
a74e9106 | 1988 | int err, ctl_len, total_len; |
89bddce5 | 1989 | |
1da177e4 | 1990 | err = -EFAULT; |
521c4dd4 JZ |
1991 | if (MSG_CMSG_COMPAT & flags) |
1992 | err = get_compat_msghdr(msg_sys, msg_compat); | |
1993 | else | |
2e8d97ab | 1994 | err = copy_msghdr_from_user(msg_sys, msg); |
521c4dd4 JZ |
1995 | if (err) |
1996 | return err; | |
1da177e4 | 1997 | |
228e548e | 1998 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
1999 | err = -EMSGSIZE; |
2000 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2001 | goto out; | |
2002 | err = -ENOMEM; | |
2003 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2004 | GFP_KERNEL); | |
1da177e4 | 2005 | if (!iov) |
228e548e | 2006 | goto out; |
1da177e4 LT |
2007 | } |
2008 | ||
2009 | /* This will also move the address data into kernel space */ | |
2010 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2011 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 2012 | } else |
43db362d | 2013 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 2014 | if (err < 0) |
1da177e4 LT |
2015 | goto out_freeiov; |
2016 | total_len = err; | |
2017 | ||
2018 | err = -ENOBUFS; | |
2019 | ||
228e548e | 2020 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2021 | goto out_freeiov; |
228e548e | 2022 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2023 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2024 | err = |
228e548e | 2025 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2026 | sizeof(ctl)); |
1da177e4 LT |
2027 | if (err) |
2028 | goto out_freeiov; | |
228e548e AB |
2029 | ctl_buf = msg_sys->msg_control; |
2030 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2031 | } else if (ctl_len) { |
89bddce5 | 2032 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2033 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2034 | if (ctl_buf == NULL) |
1da177e4 LT |
2035 | goto out_freeiov; |
2036 | } | |
2037 | err = -EFAULT; | |
2038 | /* | |
228e548e | 2039 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2040 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2041 | * checking falls down on this. | |
2042 | */ | |
fb8621bb | 2043 | if (copy_from_user(ctl_buf, |
228e548e | 2044 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2045 | ctl_len)) |
1da177e4 | 2046 | goto out_freectl; |
228e548e | 2047 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2048 | } |
228e548e | 2049 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2050 | |
2051 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2052 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2053 | /* |
2054 | * If this is sendmmsg() and current destination address is same as | |
2055 | * previously succeeded address, omit asking LSM's decision. | |
2056 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2057 | * destination address never matches. | |
2058 | */ | |
bc909d9d MD |
2059 | if (used_address && msg_sys->msg_name && |
2060 | used_address->name_len == msg_sys->msg_namelen && | |
2061 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2062 | used_address->name_len)) { |
2063 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2064 | goto out_freectl; | |
2065 | } | |
2066 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2067 | /* | |
2068 | * If this is sendmmsg() and sending to current destination address was | |
2069 | * successful, remember it. | |
2070 | */ | |
2071 | if (used_address && err >= 0) { | |
2072 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2073 | if (msg_sys->msg_name) |
2074 | memcpy(&used_address->name, msg_sys->msg_name, | |
2075 | used_address->name_len); | |
c71d8ebe | 2076 | } |
1da177e4 LT |
2077 | |
2078 | out_freectl: | |
89bddce5 | 2079 | if (ctl_buf != ctl) |
1da177e4 LT |
2080 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2081 | out_freeiov: | |
2082 | if (iov != iovstack) | |
a74e9106 | 2083 | kfree(iov); |
228e548e AB |
2084 | out: |
2085 | return err; | |
2086 | } | |
2087 | ||
2088 | /* | |
2089 | * BSD sendmsg interface | |
2090 | */ | |
2091 | ||
a7526eb5 | 2092 | long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
228e548e AB |
2093 | { |
2094 | int fput_needed, err; | |
2095 | struct msghdr msg_sys; | |
1be374a0 AL |
2096 | struct socket *sock; |
2097 | ||
1be374a0 | 2098 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2099 | if (!sock) |
2100 | goto out; | |
2101 | ||
a7526eb5 | 2102 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2103 | |
6cb153ca | 2104 | fput_light(sock->file, fput_needed); |
89bddce5 | 2105 | out: |
1da177e4 LT |
2106 | return err; |
2107 | } | |
2108 | ||
a7526eb5 AL |
2109 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
2110 | { | |
2111 | if (flags & MSG_CMSG_COMPAT) | |
2112 | return -EINVAL; | |
2113 | return __sys_sendmsg(fd, msg, flags); | |
2114 | } | |
2115 | ||
228e548e AB |
2116 | /* |
2117 | * Linux sendmmsg interface | |
2118 | */ | |
2119 | ||
2120 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2121 | unsigned int flags) | |
2122 | { | |
2123 | int fput_needed, err, datagrams; | |
2124 | struct socket *sock; | |
2125 | struct mmsghdr __user *entry; | |
2126 | struct compat_mmsghdr __user *compat_entry; | |
2127 | struct msghdr msg_sys; | |
c71d8ebe | 2128 | struct used_address used_address; |
228e548e | 2129 | |
98382f41 AB |
2130 | if (vlen > UIO_MAXIOV) |
2131 | vlen = UIO_MAXIOV; | |
228e548e AB |
2132 | |
2133 | datagrams = 0; | |
2134 | ||
2135 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2136 | if (!sock) | |
2137 | return err; | |
2138 | ||
c71d8ebe | 2139 | used_address.name_len = UINT_MAX; |
228e548e AB |
2140 | entry = mmsg; |
2141 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2142 | err = 0; |
228e548e AB |
2143 | |
2144 | while (datagrams < vlen) { | |
228e548e | 2145 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2146 | err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
2147 | &msg_sys, flags, &used_address); | |
228e548e AB |
2148 | if (err < 0) |
2149 | break; | |
2150 | err = __put_user(err, &compat_entry->msg_len); | |
2151 | ++compat_entry; | |
2152 | } else { | |
a7526eb5 AL |
2153 | err = ___sys_sendmsg(sock, |
2154 | (struct msghdr __user *)entry, | |
2155 | &msg_sys, flags, &used_address); | |
228e548e AB |
2156 | if (err < 0) |
2157 | break; | |
2158 | err = put_user(err, &entry->msg_len); | |
2159 | ++entry; | |
2160 | } | |
2161 | ||
2162 | if (err) | |
2163 | break; | |
2164 | ++datagrams; | |
2165 | } | |
2166 | ||
228e548e AB |
2167 | fput_light(sock->file, fput_needed); |
2168 | ||
728ffb86 AB |
2169 | /* We only return an error if no datagrams were able to be sent */ |
2170 | if (datagrams != 0) | |
228e548e AB |
2171 | return datagrams; |
2172 | ||
228e548e AB |
2173 | return err; |
2174 | } | |
2175 | ||
2176 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2177 | unsigned int, vlen, unsigned int, flags) | |
2178 | { | |
1be374a0 AL |
2179 | if (flags & MSG_CMSG_COMPAT) |
2180 | return -EINVAL; | |
228e548e AB |
2181 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2182 | } | |
2183 | ||
a7526eb5 | 2184 | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2185 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2186 | { |
89bddce5 SH |
2187 | struct compat_msghdr __user *msg_compat = |
2188 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2189 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2190 | struct iovec *iov = iovstack; |
1da177e4 | 2191 | unsigned long cmsg_ptr; |
a74e9106 | 2192 | int err, total_len, len; |
1da177e4 LT |
2193 | |
2194 | /* kernel mode address */ | |
230b1839 | 2195 | struct sockaddr_storage addr; |
1da177e4 LT |
2196 | |
2197 | /* user mode address pointers */ | |
2198 | struct sockaddr __user *uaddr; | |
2199 | int __user *uaddr_len; | |
89bddce5 | 2200 | |
521c4dd4 JZ |
2201 | if (MSG_CMSG_COMPAT & flags) |
2202 | err = get_compat_msghdr(msg_sys, msg_compat); | |
2203 | else | |
2e8d97ab | 2204 | err = copy_msghdr_from_user(msg_sys, msg); |
521c4dd4 JZ |
2205 | if (err) |
2206 | return err; | |
1da177e4 | 2207 | |
a2e27255 | 2208 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2209 | err = -EMSGSIZE; |
2210 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2211 | goto out; | |
2212 | err = -ENOMEM; | |
2213 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2214 | GFP_KERNEL); | |
1da177e4 | 2215 | if (!iov) |
a2e27255 | 2216 | goto out; |
1da177e4 LT |
2217 | } |
2218 | ||
2f73d7fd HFS |
2219 | /* Save the user-mode address (verify_iovec will change the |
2220 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2221 | */ |
a2e27255 | 2222 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 | 2223 | uaddr_len = COMPAT_NAMELEN(msg); |
2f73d7fd | 2224 | if (MSG_CMSG_COMPAT & flags) |
43db362d | 2225 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
2f73d7fd | 2226 | else |
43db362d | 2227 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2228 | if (err < 0) |
2229 | goto out_freeiov; | |
89bddce5 | 2230 | total_len = err; |
1da177e4 | 2231 | |
a2e27255 ACM |
2232 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2233 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2234 | |
2f73d7fd HFS |
2235 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2236 | msg_sys->msg_namelen = 0; | |
2237 | ||
1da177e4 LT |
2238 | if (sock->file->f_flags & O_NONBLOCK) |
2239 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2240 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2241 | total_len, flags); | |
1da177e4 LT |
2242 | if (err < 0) |
2243 | goto out_freeiov; | |
2244 | len = err; | |
2245 | ||
2246 | if (uaddr != NULL) { | |
43db362d | 2247 | err = move_addr_to_user(&addr, |
a2e27255 | 2248 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2249 | uaddr_len); |
1da177e4 LT |
2250 | if (err < 0) |
2251 | goto out_freeiov; | |
2252 | } | |
a2e27255 | 2253 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2254 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2255 | if (err) |
2256 | goto out_freeiov; | |
2257 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2258 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2259 | &msg_compat->msg_controllen); |
2260 | else | |
a2e27255 | 2261 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2262 | &msg->msg_controllen); |
2263 | if (err) | |
2264 | goto out_freeiov; | |
2265 | err = len; | |
2266 | ||
2267 | out_freeiov: | |
2268 | if (iov != iovstack) | |
a74e9106 | 2269 | kfree(iov); |
a2e27255 ACM |
2270 | out: |
2271 | return err; | |
2272 | } | |
2273 | ||
2274 | /* | |
2275 | * BSD recvmsg interface | |
2276 | */ | |
2277 | ||
a7526eb5 | 2278 | long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2279 | { |
2280 | int fput_needed, err; | |
2281 | struct msghdr msg_sys; | |
1be374a0 AL |
2282 | struct socket *sock; |
2283 | ||
1be374a0 | 2284 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2285 | if (!sock) |
2286 | goto out; | |
2287 | ||
a7526eb5 | 2288 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2289 | |
6cb153ca | 2290 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2291 | out: |
2292 | return err; | |
2293 | } | |
2294 | ||
a7526eb5 AL |
2295 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
2296 | unsigned int, flags) | |
2297 | { | |
2298 | if (flags & MSG_CMSG_COMPAT) | |
2299 | return -EINVAL; | |
2300 | return __sys_recvmsg(fd, msg, flags); | |
2301 | } | |
2302 | ||
a2e27255 ACM |
2303 | /* |
2304 | * Linux recvmmsg interface | |
2305 | */ | |
2306 | ||
2307 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2308 | unsigned int flags, struct timespec *timeout) | |
2309 | { | |
2310 | int fput_needed, err, datagrams; | |
2311 | struct socket *sock; | |
2312 | struct mmsghdr __user *entry; | |
d7256d0e | 2313 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2314 | struct msghdr msg_sys; |
2315 | struct timespec end_time; | |
2316 | ||
2317 | if (timeout && | |
2318 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2319 | timeout->tv_nsec)) | |
2320 | return -EINVAL; | |
2321 | ||
2322 | datagrams = 0; | |
2323 | ||
2324 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2325 | if (!sock) | |
2326 | return err; | |
2327 | ||
2328 | err = sock_error(sock->sk); | |
0b5240c4 MJ |
2329 | if (err) { |
2330 | datagrams = err; | |
a2e27255 | 2331 | goto out_put; |
0b5240c4 | 2332 | } |
a2e27255 ACM |
2333 | |
2334 | entry = mmsg; | |
d7256d0e | 2335 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2336 | |
2337 | while (datagrams < vlen) { | |
2338 | /* | |
2339 | * No need to ask LSM for more than the first datagram. | |
2340 | */ | |
d7256d0e | 2341 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2342 | err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
2343 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2344 | datagrams); | |
d7256d0e JMG |
2345 | if (err < 0) |
2346 | break; | |
2347 | err = __put_user(err, &compat_entry->msg_len); | |
2348 | ++compat_entry; | |
2349 | } else { | |
a7526eb5 AL |
2350 | err = ___sys_recvmsg(sock, |
2351 | (struct msghdr __user *)entry, | |
2352 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2353 | datagrams); | |
d7256d0e JMG |
2354 | if (err < 0) |
2355 | break; | |
2356 | err = put_user(err, &entry->msg_len); | |
2357 | ++entry; | |
2358 | } | |
2359 | ||
a2e27255 ACM |
2360 | if (err) |
2361 | break; | |
a2e27255 ACM |
2362 | ++datagrams; |
2363 | ||
71c5c159 BB |
2364 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2365 | if (flags & MSG_WAITFORONE) | |
2366 | flags |= MSG_DONTWAIT; | |
2367 | ||
a2e27255 ACM |
2368 | if (timeout) { |
2369 | ktime_get_ts(timeout); | |
2370 | *timeout = timespec_sub(end_time, *timeout); | |
2371 | if (timeout->tv_sec < 0) { | |
2372 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2373 | break; | |
2374 | } | |
2375 | ||
2376 | /* Timeout, return less than vlen datagrams */ | |
2377 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2378 | break; | |
2379 | } | |
2380 | ||
2381 | /* Out of band data, return right away */ | |
2382 | if (msg_sys.msg_flags & MSG_OOB) | |
2383 | break; | |
2384 | } | |
2385 | ||
a2e27255 | 2386 | if (err == 0) |
8ba9ba1a ACM |
2387 | goto out_put; |
2388 | ||
2389 | if (datagrams == 0) { | |
2390 | datagrams = err; | |
2391 | goto out_put; | |
2392 | } | |
a2e27255 | 2393 | |
8ba9ba1a ACM |
2394 | /* |
2395 | * We may return less entries than requested (vlen) if the | |
2396 | * sock is non block and there aren't enough datagrams... | |
2397 | */ | |
2398 | if (err != -EAGAIN) { | |
a2e27255 | 2399 | /* |
8ba9ba1a ACM |
2400 | * ... or if recvmsg returns an error after we |
2401 | * received some datagrams, where we record the | |
2402 | * error to return on the next call or if the | |
2403 | * app asks about it using getsockopt(SO_ERROR). | |
a2e27255 | 2404 | */ |
8ba9ba1a | 2405 | sock->sk->sk_err = -err; |
a2e27255 | 2406 | } |
8ba9ba1a ACM |
2407 | out_put: |
2408 | fput_light(sock->file, fput_needed); | |
a2e27255 | 2409 | |
8ba9ba1a | 2410 | return datagrams; |
a2e27255 ACM |
2411 | } |
2412 | ||
2413 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2414 | unsigned int, vlen, unsigned int, flags, | |
2415 | struct timespec __user *, timeout) | |
2416 | { | |
2417 | int datagrams; | |
2418 | struct timespec timeout_sys; | |
2419 | ||
1be374a0 AL |
2420 | if (flags & MSG_CMSG_COMPAT) |
2421 | return -EINVAL; | |
2422 | ||
a2e27255 ACM |
2423 | if (!timeout) |
2424 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2425 | ||
2426 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2427 | return -EFAULT; | |
2428 | ||
2429 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2430 | ||
2431 | if (datagrams > 0 && | |
2432 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2433 | datagrams = -EFAULT; | |
2434 | ||
2435 | return datagrams; | |
2436 | } | |
2437 | ||
2438 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2439 | /* Argument list sizes for sys_socketcall */ |
2440 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2441 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2442 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2443 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2444 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2445 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2446 | }; |
2447 | ||
1da177e4 LT |
2448 | #undef AL |
2449 | ||
2450 | /* | |
89bddce5 | 2451 | * System call vectors. |
1da177e4 LT |
2452 | * |
2453 | * Argument checking cleaned up. Saved 20% in size. | |
2454 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2455 | * it is set by the callees. |
1da177e4 LT |
2456 | */ |
2457 | ||
3e0fa65f | 2458 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2459 | { |
2950fa9d | 2460 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2461 | unsigned long a0, a1; |
1da177e4 | 2462 | int err; |
47379052 | 2463 | unsigned int len; |
1da177e4 | 2464 | |
228e548e | 2465 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2466 | return -EINVAL; |
2467 | ||
47379052 AV |
2468 | len = nargs[call]; |
2469 | if (len > sizeof(a)) | |
2470 | return -EINVAL; | |
2471 | ||
1da177e4 | 2472 | /* copy_from_user should be SMP safe. */ |
47379052 | 2473 | if (copy_from_user(a, args, len)) |
1da177e4 | 2474 | return -EFAULT; |
3ec3b2fb | 2475 | |
2950fa9d CG |
2476 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2477 | if (err) | |
2478 | return err; | |
3ec3b2fb | 2479 | |
89bddce5 SH |
2480 | a0 = a[0]; |
2481 | a1 = a[1]; | |
2482 | ||
2483 | switch (call) { | |
2484 | case SYS_SOCKET: | |
2485 | err = sys_socket(a0, a1, a[2]); | |
2486 | break; | |
2487 | case SYS_BIND: | |
2488 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2489 | break; | |
2490 | case SYS_CONNECT: | |
2491 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2492 | break; | |
2493 | case SYS_LISTEN: | |
2494 | err = sys_listen(a0, a1); | |
2495 | break; | |
2496 | case SYS_ACCEPT: | |
de11defe UD |
2497 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2498 | (int __user *)a[2], 0); | |
89bddce5 SH |
2499 | break; |
2500 | case SYS_GETSOCKNAME: | |
2501 | err = | |
2502 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2503 | (int __user *)a[2]); | |
2504 | break; | |
2505 | case SYS_GETPEERNAME: | |
2506 | err = | |
2507 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2508 | (int __user *)a[2]); | |
2509 | break; | |
2510 | case SYS_SOCKETPAIR: | |
2511 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2512 | break; | |
2513 | case SYS_SEND: | |
2514 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2515 | break; | |
2516 | case SYS_SENDTO: | |
2517 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2518 | (struct sockaddr __user *)a[4], a[5]); | |
2519 | break; | |
2520 | case SYS_RECV: | |
2521 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2522 | break; | |
2523 | case SYS_RECVFROM: | |
2524 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2525 | (struct sockaddr __user *)a[4], | |
2526 | (int __user *)a[5]); | |
2527 | break; | |
2528 | case SYS_SHUTDOWN: | |
2529 | err = sys_shutdown(a0, a1); | |
2530 | break; | |
2531 | case SYS_SETSOCKOPT: | |
2532 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2533 | break; | |
2534 | case SYS_GETSOCKOPT: | |
2535 | err = | |
2536 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2537 | (int __user *)a[4]); | |
2538 | break; | |
2539 | case SYS_SENDMSG: | |
2540 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2541 | break; | |
228e548e AB |
2542 | case SYS_SENDMMSG: |
2543 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2544 | break; | |
89bddce5 SH |
2545 | case SYS_RECVMSG: |
2546 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2547 | break; | |
a2e27255 ACM |
2548 | case SYS_RECVMMSG: |
2549 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2550 | (struct timespec __user *)a[4]); | |
2551 | break; | |
de11defe UD |
2552 | case SYS_ACCEPT4: |
2553 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2554 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2555 | break; |
89bddce5 SH |
2556 | default: |
2557 | err = -EINVAL; | |
2558 | break; | |
1da177e4 LT |
2559 | } |
2560 | return err; | |
2561 | } | |
2562 | ||
89bddce5 | 2563 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2564 | |
55737fda SH |
2565 | /** |
2566 | * sock_register - add a socket protocol handler | |
2567 | * @ops: description of protocol | |
2568 | * | |
1da177e4 LT |
2569 | * This function is called by a protocol handler that wants to |
2570 | * advertise its address family, and have it linked into the | |
55737fda SH |
2571 | * socket interface. The value ops->family coresponds to the |
2572 | * socket system call protocol family. | |
1da177e4 | 2573 | */ |
f0fd27d4 | 2574 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2575 | { |
2576 | int err; | |
2577 | ||
2578 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2579 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2580 | NPROTO); | |
1da177e4 LT |
2581 | return -ENOBUFS; |
2582 | } | |
55737fda SH |
2583 | |
2584 | spin_lock(&net_family_lock); | |
190683a9 ED |
2585 | if (rcu_dereference_protected(net_families[ops->family], |
2586 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2587 | err = -EEXIST; |
2588 | else { | |
cf778b00 | 2589 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2590 | err = 0; |
2591 | } | |
55737fda SH |
2592 | spin_unlock(&net_family_lock); |
2593 | ||
89bddce5 | 2594 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2595 | return err; |
2596 | } | |
c6d409cf | 2597 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2598 | |
55737fda SH |
2599 | /** |
2600 | * sock_unregister - remove a protocol handler | |
2601 | * @family: protocol family to remove | |
2602 | * | |
1da177e4 LT |
2603 | * This function is called by a protocol handler that wants to |
2604 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2605 | * new socket creation. |
2606 | * | |
2607 | * If protocol handler is a module, then it can use module reference | |
2608 | * counts to protect against new references. If protocol handler is not | |
2609 | * a module then it needs to provide its own protection in | |
2610 | * the ops->create routine. | |
1da177e4 | 2611 | */ |
f0fd27d4 | 2612 | void sock_unregister(int family) |
1da177e4 | 2613 | { |
f0fd27d4 | 2614 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2615 | |
55737fda | 2616 | spin_lock(&net_family_lock); |
a9b3cd7f | 2617 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2618 | spin_unlock(&net_family_lock); |
2619 | ||
2620 | synchronize_rcu(); | |
2621 | ||
89bddce5 | 2622 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2623 | } |
c6d409cf | 2624 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2625 | |
77d76ea3 | 2626 | static int __init sock_init(void) |
1da177e4 | 2627 | { |
b3e19d92 | 2628 | int err; |
2ca794e5 EB |
2629 | /* |
2630 | * Initialize the network sysctl infrastructure. | |
2631 | */ | |
2632 | err = net_sysctl_init(); | |
2633 | if (err) | |
2634 | goto out; | |
b3e19d92 | 2635 | |
1da177e4 | 2636 | /* |
89bddce5 | 2637 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2638 | */ |
2639 | skb_init(); | |
1da177e4 LT |
2640 | |
2641 | /* | |
89bddce5 | 2642 | * Initialize the protocols module. |
1da177e4 LT |
2643 | */ |
2644 | ||
2645 | init_inodecache(); | |
b3e19d92 NP |
2646 | |
2647 | err = register_filesystem(&sock_fs_type); | |
2648 | if (err) | |
2649 | goto out_fs; | |
1da177e4 | 2650 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2651 | if (IS_ERR(sock_mnt)) { |
2652 | err = PTR_ERR(sock_mnt); | |
2653 | goto out_mount; | |
2654 | } | |
77d76ea3 AK |
2655 | |
2656 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2657 | */ |
2658 | ||
2659 | #ifdef CONFIG_NETFILTER | |
2660 | netfilter_init(); | |
2661 | #endif | |
cbeb321a | 2662 | |
c1f19b51 RC |
2663 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2664 | skb_timestamping_init(); | |
2665 | #endif | |
2666 | ||
b3e19d92 NP |
2667 | out: |
2668 | return err; | |
2669 | ||
2670 | out_mount: | |
2671 | unregister_filesystem(&sock_fs_type); | |
2672 | out_fs: | |
2673 | goto out; | |
1da177e4 LT |
2674 | } |
2675 | ||
77d76ea3 AK |
2676 | core_initcall(sock_init); /* early initcall */ |
2677 | ||
1da177e4 LT |
2678 | #ifdef CONFIG_PROC_FS |
2679 | void socket_seq_show(struct seq_file *seq) | |
2680 | { | |
2681 | int cpu; | |
2682 | int counter = 0; | |
2683 | ||
6f912042 | 2684 | for_each_possible_cpu(cpu) |
89bddce5 | 2685 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2686 | |
2687 | /* It can be negative, by the way. 8) */ | |
2688 | if (counter < 0) | |
2689 | counter = 0; | |
2690 | ||
2691 | seq_printf(seq, "sockets: used %d\n", counter); | |
2692 | } | |
89bddce5 | 2693 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2694 | |
89bbfc95 | 2695 | #ifdef CONFIG_COMPAT |
6b96018b | 2696 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2697 | unsigned int cmd, void __user *up) |
7a229387 | 2698 | { |
7a229387 AB |
2699 | mm_segment_t old_fs = get_fs(); |
2700 | struct timeval ktv; | |
2701 | int err; | |
2702 | ||
2703 | set_fs(KERNEL_DS); | |
6b96018b | 2704 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2705 | set_fs(old_fs); |
644595f8 | 2706 | if (!err) |
ed6fe9d6 | 2707 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2708 | |
7a229387 AB |
2709 | return err; |
2710 | } | |
2711 | ||
6b96018b | 2712 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2713 | unsigned int cmd, void __user *up) |
7a229387 | 2714 | { |
7a229387 AB |
2715 | mm_segment_t old_fs = get_fs(); |
2716 | struct timespec kts; | |
2717 | int err; | |
2718 | ||
2719 | set_fs(KERNEL_DS); | |
6b96018b | 2720 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2721 | set_fs(old_fs); |
644595f8 | 2722 | if (!err) |
ed6fe9d6 | 2723 | err = compat_put_timespec(&kts, up); |
644595f8 | 2724 | |
7a229387 AB |
2725 | return err; |
2726 | } | |
2727 | ||
6b96018b | 2728 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2729 | { |
2730 | struct ifreq __user *uifr; | |
2731 | int err; | |
2732 | ||
2733 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2734 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2735 | return -EFAULT; |
2736 | ||
6b96018b | 2737 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2738 | if (err) |
2739 | return err; | |
2740 | ||
6b96018b | 2741 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2742 | return -EFAULT; |
2743 | ||
2744 | return 0; | |
2745 | } | |
2746 | ||
6b96018b | 2747 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2748 | { |
6b96018b | 2749 | struct compat_ifconf ifc32; |
7a229387 AB |
2750 | struct ifconf ifc; |
2751 | struct ifconf __user *uifc; | |
6b96018b | 2752 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2753 | struct ifreq __user *ifr; |
2754 | unsigned int i, j; | |
2755 | int err; | |
2756 | ||
6b96018b | 2757 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2758 | return -EFAULT; |
2759 | ||
43da5f2e | 2760 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2761 | if (ifc32.ifcbuf == 0) { |
2762 | ifc32.ifc_len = 0; | |
2763 | ifc.ifc_len = 0; | |
2764 | ifc.ifc_req = NULL; | |
2765 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2766 | } else { | |
c6d409cf ED |
2767 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2768 | sizeof(struct ifreq); | |
7a229387 AB |
2769 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2770 | ifc.ifc_len = len; | |
2771 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2772 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2773 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2774 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2775 | return -EFAULT; |
2776 | ifr++; | |
2777 | ifr32++; | |
2778 | } | |
2779 | } | |
2780 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2781 | return -EFAULT; | |
2782 | ||
6b96018b | 2783 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2784 | if (err) |
2785 | return err; | |
2786 | ||
2787 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2788 | return -EFAULT; | |
2789 | ||
2790 | ifr = ifc.ifc_req; | |
2791 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2792 | for (i = 0, j = 0; | |
c6d409cf ED |
2793 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2794 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2795 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2796 | return -EFAULT; |
2797 | ifr32++; | |
2798 | ifr++; | |
2799 | } | |
2800 | ||
2801 | if (ifc32.ifcbuf == 0) { | |
2802 | /* Translate from 64-bit structure multiple to | |
2803 | * a 32-bit one. | |
2804 | */ | |
2805 | i = ifc.ifc_len; | |
6b96018b | 2806 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2807 | ifc32.ifc_len = i; |
2808 | } else { | |
2809 | ifc32.ifc_len = i; | |
2810 | } | |
6b96018b | 2811 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2812 | return -EFAULT; |
2813 | ||
2814 | return 0; | |
2815 | } | |
2816 | ||
6b96018b | 2817 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2818 | { |
3a7da39d BH |
2819 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2820 | bool convert_in = false, convert_out = false; | |
2821 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2822 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2823 | struct ifreq __user *ifr; |
3a7da39d BH |
2824 | u32 rule_cnt = 0, actual_rule_cnt; |
2825 | u32 ethcmd; | |
7a229387 | 2826 | u32 data; |
3a7da39d | 2827 | int ret; |
7a229387 | 2828 | |
3a7da39d BH |
2829 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2830 | return -EFAULT; | |
7a229387 | 2831 | |
3a7da39d BH |
2832 | compat_rxnfc = compat_ptr(data); |
2833 | ||
2834 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2835 | return -EFAULT; |
2836 | ||
3a7da39d BH |
2837 | /* Most ethtool structures are defined without padding. |
2838 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2839 | */ | |
2840 | switch (ethcmd) { | |
2841 | default: | |
2842 | break; | |
2843 | case ETHTOOL_GRXCLSRLALL: | |
2844 | /* Buffer size is variable */ | |
2845 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2846 | return -EFAULT; | |
2847 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2848 | return -ENOMEM; | |
2849 | buf_size += rule_cnt * sizeof(u32); | |
2850 | /* fall through */ | |
2851 | case ETHTOOL_GRXRINGS: | |
2852 | case ETHTOOL_GRXCLSRLCNT: | |
2853 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2854 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2855 | convert_out = true; |
2856 | /* fall through */ | |
2857 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2858 | buf_size += sizeof(struct ethtool_rxnfc); |
2859 | convert_in = true; | |
2860 | break; | |
2861 | } | |
2862 | ||
2863 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2864 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2865 | |
2866 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2867 | return -EFAULT; |
2868 | ||
3a7da39d BH |
2869 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2870 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2871 | return -EFAULT; |
2872 | ||
3a7da39d | 2873 | if (convert_in) { |
127fe533 | 2874 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2875 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2876 | */ | |
127fe533 AD |
2877 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2878 | sizeof(compat_rxnfc->fs.m_ext) != | |
2879 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2880 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2881 | BUILD_BUG_ON( |
2882 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2883 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2884 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2885 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2886 | ||
2887 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2888 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2889 | (void __user *)rxnfc) || | |
3a7da39d BH |
2890 | copy_in_user(&rxnfc->fs.ring_cookie, |
2891 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2892 | (void __user *)(&rxnfc->fs.location + 1) - |
2893 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2894 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2895 | sizeof(rxnfc->rule_cnt))) | |
2896 | return -EFAULT; | |
2897 | } | |
2898 | ||
2899 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2900 | if (ret) | |
2901 | return ret; | |
2902 | ||
2903 | if (convert_out) { | |
2904 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2905 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2906 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2907 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2908 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2909 | (const void __user *)(&rxnfc->fs.location + 1) - |
2910 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2911 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2912 | sizeof(rxnfc->rule_cnt))) | |
2913 | return -EFAULT; | |
2914 | ||
2915 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2916 | /* As an optimisation, we only copy the actual | |
2917 | * number of rules that the underlying | |
2918 | * function returned. Since Mallory might | |
2919 | * change the rule count in user memory, we | |
2920 | * check that it is less than the rule count | |
2921 | * originally given (as the user buffer size), | |
2922 | * which has been range-checked. | |
2923 | */ | |
2924 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2925 | return -EFAULT; | |
2926 | if (actual_rule_cnt < rule_cnt) | |
2927 | rule_cnt = actual_rule_cnt; | |
2928 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2929 | &rxnfc->rule_locs[0], | |
2930 | rule_cnt * sizeof(u32))) | |
2931 | return -EFAULT; | |
2932 | } | |
2933 | } | |
2934 | ||
2935 | return 0; | |
7a229387 AB |
2936 | } |
2937 | ||
7a50a240 AB |
2938 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2939 | { | |
2940 | void __user *uptr; | |
2941 | compat_uptr_t uptr32; | |
2942 | struct ifreq __user *uifr; | |
2943 | ||
c6d409cf | 2944 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2945 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2946 | return -EFAULT; | |
2947 | ||
2948 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2949 | return -EFAULT; | |
2950 | ||
2951 | uptr = compat_ptr(uptr32); | |
2952 | ||
2953 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2954 | return -EFAULT; | |
2955 | ||
2956 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2957 | } | |
2958 | ||
6b96018b AB |
2959 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2960 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2961 | { |
2962 | struct ifreq kifr; | |
2963 | struct ifreq __user *uifr; | |
7a229387 AB |
2964 | mm_segment_t old_fs; |
2965 | int err; | |
2966 | u32 data; | |
2967 | void __user *datap; | |
2968 | ||
2969 | switch (cmd) { | |
2970 | case SIOCBONDENSLAVE: | |
2971 | case SIOCBONDRELEASE: | |
2972 | case SIOCBONDSETHWADDR: | |
2973 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2974 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2975 | return -EFAULT; |
2976 | ||
2977 | old_fs = get_fs(); | |
c6d409cf | 2978 | set_fs(KERNEL_DS); |
c3f52ae6 | 2979 | err = dev_ioctl(net, cmd, |
2980 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2981 | set_fs(old_fs); |
7a229387 AB |
2982 | |
2983 | return err; | |
2984 | case SIOCBONDSLAVEINFOQUERY: | |
2985 | case SIOCBONDINFOQUERY: | |
2986 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2987 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2988 | return -EFAULT; | |
2989 | ||
2990 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2991 | return -EFAULT; | |
2992 | ||
2993 | datap = compat_ptr(data); | |
2994 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2995 | return -EFAULT; | |
2996 | ||
6b96018b | 2997 | return dev_ioctl(net, cmd, uifr); |
7a229387 | 2998 | default: |
07d106d0 | 2999 | return -ENOIOCTLCMD; |
ccbd6a5a | 3000 | } |
7a229387 AB |
3001 | } |
3002 | ||
6b96018b AB |
3003 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
3004 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
3005 | { |
3006 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
3007 | char tmp_buf[IFNAMSIZ]; |
3008 | void __user *data64; | |
3009 | u32 data32; | |
3010 | ||
3011 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
3012 | IFNAMSIZ)) | |
3013 | return -EFAULT; | |
3014 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
3015 | return -EFAULT; | |
3016 | data64 = compat_ptr(data32); | |
3017 | ||
3018 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
3019 | ||
3020 | /* Don't check these user accesses, just let that get trapped | |
3021 | * in the ioctl handler instead. | |
3022 | */ | |
3023 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
3024 | IFNAMSIZ)) | |
3025 | return -EFAULT; | |
3026 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
3027 | return -EFAULT; | |
3028 | ||
6b96018b | 3029 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
3030 | } |
3031 | ||
6b96018b AB |
3032 | static int dev_ifsioc(struct net *net, struct socket *sock, |
3033 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 3034 | { |
a2116ed2 | 3035 | struct ifreq __user *uifr; |
7a229387 AB |
3036 | int err; |
3037 | ||
a2116ed2 AB |
3038 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
3039 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
3040 | return -EFAULT; | |
3041 | ||
3042 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
3043 | ||
7a229387 AB |
3044 | if (!err) { |
3045 | switch (cmd) { | |
3046 | case SIOCGIFFLAGS: | |
3047 | case SIOCGIFMETRIC: | |
3048 | case SIOCGIFMTU: | |
3049 | case SIOCGIFMEM: | |
3050 | case SIOCGIFHWADDR: | |
3051 | case SIOCGIFINDEX: | |
3052 | case SIOCGIFADDR: | |
3053 | case SIOCGIFBRDADDR: | |
3054 | case SIOCGIFDSTADDR: | |
3055 | case SIOCGIFNETMASK: | |
fab2532b | 3056 | case SIOCGIFPFLAGS: |
7a229387 | 3057 | case SIOCGIFTXQLEN: |
fab2532b AB |
3058 | case SIOCGMIIPHY: |
3059 | case SIOCGMIIREG: | |
a2116ed2 | 3060 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
3061 | err = -EFAULT; |
3062 | break; | |
3063 | } | |
3064 | } | |
3065 | return err; | |
3066 | } | |
3067 | ||
a2116ed2 AB |
3068 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3069 | struct compat_ifreq __user *uifr32) | |
3070 | { | |
3071 | struct ifreq ifr; | |
3072 | struct compat_ifmap __user *uifmap32; | |
3073 | mm_segment_t old_fs; | |
3074 | int err; | |
3075 | ||
3076 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3077 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3078 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3079 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3080 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3081 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3082 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3083 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
3084 | if (err) | |
3085 | return -EFAULT; | |
3086 | ||
3087 | old_fs = get_fs(); | |
c6d409cf | 3088 | set_fs(KERNEL_DS); |
c3f52ae6 | 3089 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3090 | set_fs(old_fs); |
a2116ed2 AB |
3091 | |
3092 | if (cmd == SIOCGIFMAP && !err) { | |
3093 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3094 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3095 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3096 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3097 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3098 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3099 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
3100 | if (err) | |
3101 | err = -EFAULT; | |
3102 | } | |
3103 | return err; | |
3104 | } | |
3105 | ||
3106 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
3107 | { | |
3108 | void __user *uptr; | |
3109 | compat_uptr_t uptr32; | |
3110 | struct ifreq __user *uifr; | |
3111 | ||
c6d409cf | 3112 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
a2116ed2 AB |
3113 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
3114 | return -EFAULT; | |
3115 | ||
3116 | if (get_user(uptr32, &uifr32->ifr_data)) | |
3117 | return -EFAULT; | |
3118 | ||
3119 | uptr = compat_ptr(uptr32); | |
3120 | ||
3121 | if (put_user(uptr, &uifr->ifr_data)) | |
3122 | return -EFAULT; | |
3123 | ||
3124 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
3125 | } | |
3126 | ||
7a229387 | 3127 | struct rtentry32 { |
c6d409cf | 3128 | u32 rt_pad1; |
7a229387 AB |
3129 | struct sockaddr rt_dst; /* target address */ |
3130 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3131 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3132 | unsigned short rt_flags; |
3133 | short rt_pad2; | |
3134 | u32 rt_pad3; | |
3135 | unsigned char rt_tos; | |
3136 | unsigned char rt_class; | |
3137 | short rt_pad4; | |
3138 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3139 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3140 | u32 rt_mtu; /* per route MTU/Window */ |
3141 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3142 | unsigned short rt_irtt; /* Initial RTT */ |
3143 | }; | |
3144 | ||
3145 | struct in6_rtmsg32 { | |
3146 | struct in6_addr rtmsg_dst; | |
3147 | struct in6_addr rtmsg_src; | |
3148 | struct in6_addr rtmsg_gateway; | |
3149 | u32 rtmsg_type; | |
3150 | u16 rtmsg_dst_len; | |
3151 | u16 rtmsg_src_len; | |
3152 | u32 rtmsg_metric; | |
3153 | u32 rtmsg_info; | |
3154 | u32 rtmsg_flags; | |
3155 | s32 rtmsg_ifindex; | |
3156 | }; | |
3157 | ||
6b96018b AB |
3158 | static int routing_ioctl(struct net *net, struct socket *sock, |
3159 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3160 | { |
3161 | int ret; | |
3162 | void *r = NULL; | |
3163 | struct in6_rtmsg r6; | |
3164 | struct rtentry r4; | |
3165 | char devname[16]; | |
3166 | u32 rtdev; | |
3167 | mm_segment_t old_fs = get_fs(); | |
3168 | ||
6b96018b AB |
3169 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3170 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3171 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3172 | 3 * sizeof(struct in6_addr)); |
c6d409cf ED |
3173 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3174 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3175 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3176 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3177 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3178 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3179 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3180 | |
3181 | r = (void *) &r6; | |
3182 | } else { /* ipv4 */ | |
6b96018b | 3183 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3184 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3185 | 3 * sizeof(struct sockaddr)); |
c6d409cf ED |
3186 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
3187 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3188 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3189 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
3190 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3191 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3192 | if (rtdev) { |
c6d409cf | 3193 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3194 | r4.rt_dev = (char __user __force *)devname; |
3195 | devname[15] = 0; | |
7a229387 AB |
3196 | } else |
3197 | r4.rt_dev = NULL; | |
3198 | ||
3199 | r = (void *) &r4; | |
3200 | } | |
3201 | ||
3202 | if (ret) { | |
3203 | ret = -EFAULT; | |
3204 | goto out; | |
3205 | } | |
3206 | ||
c6d409cf | 3207 | set_fs(KERNEL_DS); |
6b96018b | 3208 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3209 | set_fs(old_fs); |
7a229387 AB |
3210 | |
3211 | out: | |
7a229387 AB |
3212 | return ret; |
3213 | } | |
3214 | ||
3215 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3216 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3217 | * use compatible ioctls |
7a229387 | 3218 | */ |
6b96018b | 3219 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3220 | { |
6b96018b | 3221 | compat_ulong_t tmp; |
7a229387 | 3222 | |
6b96018b | 3223 | if (get_user(tmp, argp)) |
7a229387 AB |
3224 | return -EFAULT; |
3225 | if (tmp == BRCTL_GET_VERSION) | |
3226 | return BRCTL_VERSION + 1; | |
3227 | return -EINVAL; | |
3228 | } | |
3229 | ||
6b96018b AB |
3230 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3231 | unsigned int cmd, unsigned long arg) | |
3232 | { | |
3233 | void __user *argp = compat_ptr(arg); | |
3234 | struct sock *sk = sock->sk; | |
3235 | struct net *net = sock_net(sk); | |
7a229387 | 3236 | |
6b96018b AB |
3237 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
3238 | return siocdevprivate_ioctl(net, cmd, argp); | |
3239 | ||
3240 | switch (cmd) { | |
3241 | case SIOCSIFBR: | |
3242 | case SIOCGIFBR: | |
3243 | return old_bridge_ioctl(argp); | |
3244 | case SIOCGIFNAME: | |
3245 | return dev_ifname32(net, argp); | |
3246 | case SIOCGIFCONF: | |
3247 | return dev_ifconf(net, argp); | |
3248 | case SIOCETHTOOL: | |
3249 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3250 | case SIOCWANDEV: |
3251 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3252 | case SIOCGIFMAP: |
3253 | case SIOCSIFMAP: | |
3254 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3255 | case SIOCBONDENSLAVE: |
3256 | case SIOCBONDRELEASE: | |
3257 | case SIOCBONDSETHWADDR: | |
3258 | case SIOCBONDSLAVEINFOQUERY: | |
3259 | case SIOCBONDINFOQUERY: | |
3260 | case SIOCBONDCHANGEACTIVE: | |
3261 | return bond_ioctl(net, cmd, argp); | |
3262 | case SIOCADDRT: | |
3263 | case SIOCDELRT: | |
3264 | return routing_ioctl(net, sock, cmd, argp); | |
3265 | case SIOCGSTAMP: | |
3266 | return do_siocgstamp(net, sock, cmd, argp); | |
3267 | case SIOCGSTAMPNS: | |
3268 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
3269 | case SIOCSHWTSTAMP: |
3270 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
3271 | |
3272 | case FIOSETOWN: | |
3273 | case SIOCSPGRP: | |
3274 | case FIOGETOWN: | |
3275 | case SIOCGPGRP: | |
3276 | case SIOCBRADDBR: | |
3277 | case SIOCBRDELBR: | |
3278 | case SIOCGIFVLAN: | |
3279 | case SIOCSIFVLAN: | |
3280 | case SIOCADDDLCI: | |
3281 | case SIOCDELDLCI: | |
3282 | return sock_ioctl(file, cmd, arg); | |
3283 | ||
3284 | case SIOCGIFFLAGS: | |
3285 | case SIOCSIFFLAGS: | |
3286 | case SIOCGIFMETRIC: | |
3287 | case SIOCSIFMETRIC: | |
3288 | case SIOCGIFMTU: | |
3289 | case SIOCSIFMTU: | |
3290 | case SIOCGIFMEM: | |
3291 | case SIOCSIFMEM: | |
3292 | case SIOCGIFHWADDR: | |
3293 | case SIOCSIFHWADDR: | |
3294 | case SIOCADDMULTI: | |
3295 | case SIOCDELMULTI: | |
3296 | case SIOCGIFINDEX: | |
6b96018b AB |
3297 | case SIOCGIFADDR: |
3298 | case SIOCSIFADDR: | |
3299 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3300 | case SIOCDIFADDR: |
6b96018b AB |
3301 | case SIOCGIFBRDADDR: |
3302 | case SIOCSIFBRDADDR: | |
3303 | case SIOCGIFDSTADDR: | |
3304 | case SIOCSIFDSTADDR: | |
3305 | case SIOCGIFNETMASK: | |
3306 | case SIOCSIFNETMASK: | |
3307 | case SIOCSIFPFLAGS: | |
3308 | case SIOCGIFPFLAGS: | |
3309 | case SIOCGIFTXQLEN: | |
3310 | case SIOCSIFTXQLEN: | |
3311 | case SIOCBRADDIF: | |
3312 | case SIOCBRDELIF: | |
9177efd3 AB |
3313 | case SIOCSIFNAME: |
3314 | case SIOCGMIIPHY: | |
3315 | case SIOCGMIIREG: | |
3316 | case SIOCSMIIREG: | |
6b96018b | 3317 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3318 | |
6b96018b AB |
3319 | case SIOCSARP: |
3320 | case SIOCGARP: | |
3321 | case SIOCDARP: | |
6b96018b | 3322 | case SIOCATMARK: |
9177efd3 AB |
3323 | return sock_do_ioctl(net, sock, cmd, arg); |
3324 | } | |
3325 | ||
6b96018b AB |
3326 | return -ENOIOCTLCMD; |
3327 | } | |
7a229387 | 3328 | |
95c96174 | 3329 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3330 | unsigned long arg) |
89bbfc95 SP |
3331 | { |
3332 | struct socket *sock = file->private_data; | |
3333 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3334 | struct sock *sk; |
3335 | struct net *net; | |
3336 | ||
3337 | sk = sock->sk; | |
3338 | net = sock_net(sk); | |
89bbfc95 SP |
3339 | |
3340 | if (sock->ops->compat_ioctl) | |
3341 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3342 | ||
87de87d5 DM |
3343 | if (ret == -ENOIOCTLCMD && |
3344 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3345 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3346 | ||
6b96018b AB |
3347 | if (ret == -ENOIOCTLCMD) |
3348 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3349 | ||
89bbfc95 SP |
3350 | return ret; |
3351 | } | |
3352 | #endif | |
3353 | ||
ac5a488e SS |
3354 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3355 | { | |
3356 | return sock->ops->bind(sock, addr, addrlen); | |
3357 | } | |
c6d409cf | 3358 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3359 | |
3360 | int kernel_listen(struct socket *sock, int backlog) | |
3361 | { | |
3362 | return sock->ops->listen(sock, backlog); | |
3363 | } | |
c6d409cf | 3364 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3365 | |
3366 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3367 | { | |
3368 | struct sock *sk = sock->sk; | |
3369 | int err; | |
3370 | ||
3371 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3372 | newsock); | |
3373 | if (err < 0) | |
3374 | goto done; | |
3375 | ||
3376 | err = sock->ops->accept(sock, *newsock, flags); | |
3377 | if (err < 0) { | |
3378 | sock_release(*newsock); | |
fa8705b0 | 3379 | *newsock = NULL; |
ac5a488e SS |
3380 | goto done; |
3381 | } | |
3382 | ||
3383 | (*newsock)->ops = sock->ops; | |
1b08534e | 3384 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3385 | |
3386 | done: | |
3387 | return err; | |
3388 | } | |
c6d409cf | 3389 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3390 | |
3391 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3392 | int flags) |
ac5a488e SS |
3393 | { |
3394 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3395 | } | |
c6d409cf | 3396 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3397 | |
3398 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3399 | int *addrlen) | |
3400 | { | |
3401 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3402 | } | |
c6d409cf | 3403 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3404 | |
3405 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3406 | int *addrlen) | |
3407 | { | |
3408 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3409 | } | |
c6d409cf | 3410 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3411 | |
3412 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3413 | char *optval, int *optlen) | |
3414 | { | |
3415 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3416 | char __user *uoptval; |
3417 | int __user *uoptlen; | |
ac5a488e SS |
3418 | int err; |
3419 | ||
fb8621bb NK |
3420 | uoptval = (char __user __force *) optval; |
3421 | uoptlen = (int __user __force *) optlen; | |
3422 | ||
ac5a488e SS |
3423 | set_fs(KERNEL_DS); |
3424 | if (level == SOL_SOCKET) | |
fb8621bb | 3425 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3426 | else |
fb8621bb NK |
3427 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3428 | uoptlen); | |
ac5a488e SS |
3429 | set_fs(oldfs); |
3430 | return err; | |
3431 | } | |
c6d409cf | 3432 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3433 | |
3434 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3435 | char *optval, unsigned int optlen) |
ac5a488e SS |
3436 | { |
3437 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3438 | char __user *uoptval; |
ac5a488e SS |
3439 | int err; |
3440 | ||
fb8621bb NK |
3441 | uoptval = (char __user __force *) optval; |
3442 | ||
ac5a488e SS |
3443 | set_fs(KERNEL_DS); |
3444 | if (level == SOL_SOCKET) | |
fb8621bb | 3445 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3446 | else |
fb8621bb | 3447 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3448 | optlen); |
3449 | set_fs(oldfs); | |
3450 | return err; | |
3451 | } | |
c6d409cf | 3452 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3453 | |
3454 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3455 | size_t size, int flags) | |
3456 | { | |
3457 | if (sock->ops->sendpage) | |
3458 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3459 | ||
3460 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3461 | } | |
c6d409cf | 3462 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3463 | |
3464 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3465 | { | |
3466 | mm_segment_t oldfs = get_fs(); | |
3467 | int err; | |
3468 | ||
3469 | set_fs(KERNEL_DS); | |
3470 | err = sock->ops->ioctl(sock, cmd, arg); | |
3471 | set_fs(oldfs); | |
3472 | ||
3473 | return err; | |
3474 | } | |
c6d409cf | 3475 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3476 | |
91cf45f0 TM |
3477 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3478 | { | |
3479 | return sock->ops->shutdown(sock, how); | |
3480 | } | |
91cf45f0 | 3481 | EXPORT_SYMBOL(kernel_sock_shutdown); |