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 | ||
89bddce5 SH |
218 | err = get_user(len, ulen); |
219 | if (err) | |
1da177e4 | 220 | return err; |
89bddce5 SH |
221 | if (len > klen) |
222 | len = klen; | |
230b1839 | 223 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 224 | return -EINVAL; |
89bddce5 | 225 | if (len) { |
d6fe3945 SG |
226 | if (audit_sockaddr(klen, kaddr)) |
227 | return -ENOMEM; | |
89bddce5 | 228 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
229 | return -EFAULT; |
230 | } | |
231 | /* | |
89bddce5 SH |
232 | * "fromlen shall refer to the value before truncation.." |
233 | * 1003.1g | |
1da177e4 LT |
234 | */ |
235 | return __put_user(klen, ulen); | |
236 | } | |
237 | ||
e18b890b | 238 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
239 | |
240 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
241 | { | |
242 | struct socket_alloc *ei; | |
eaefd110 | 243 | struct socket_wq *wq; |
89bddce5 | 244 | |
e94b1766 | 245 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
246 | if (!ei) |
247 | return NULL; | |
eaefd110 ED |
248 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
249 | if (!wq) { | |
43815482 ED |
250 | kmem_cache_free(sock_inode_cachep, ei); |
251 | return NULL; | |
252 | } | |
eaefd110 ED |
253 | init_waitqueue_head(&wq->wait); |
254 | wq->fasync_list = NULL; | |
255 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 256 | |
1da177e4 LT |
257 | ei->socket.state = SS_UNCONNECTED; |
258 | ei->socket.flags = 0; | |
259 | ei->socket.ops = NULL; | |
260 | ei->socket.sk = NULL; | |
261 | ei->socket.file = NULL; | |
1da177e4 LT |
262 | |
263 | return &ei->vfs_inode; | |
264 | } | |
265 | ||
266 | static void sock_destroy_inode(struct inode *inode) | |
267 | { | |
43815482 | 268 | struct socket_alloc *ei; |
eaefd110 | 269 | struct socket_wq *wq; |
43815482 ED |
270 | |
271 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 272 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 273 | kfree_rcu(wq, rcu); |
43815482 | 274 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
275 | } |
276 | ||
51cc5068 | 277 | static void init_once(void *foo) |
1da177e4 | 278 | { |
89bddce5 | 279 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 280 | |
a35afb83 | 281 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 282 | } |
89bddce5 | 283 | |
1da177e4 LT |
284 | static int init_inodecache(void) |
285 | { | |
286 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
287 | sizeof(struct socket_alloc), |
288 | 0, | |
289 | (SLAB_HWCACHE_ALIGN | | |
290 | SLAB_RECLAIM_ACCOUNT | | |
291 | SLAB_MEM_SPREAD), | |
20c2df83 | 292 | init_once); |
1da177e4 LT |
293 | if (sock_inode_cachep == NULL) |
294 | return -ENOMEM; | |
295 | return 0; | |
296 | } | |
297 | ||
b87221de | 298 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
299 | .alloc_inode = sock_alloc_inode, |
300 | .destroy_inode = sock_destroy_inode, | |
301 | .statfs = simple_statfs, | |
1da177e4 LT |
302 | }; |
303 | ||
c23fbb6b ED |
304 | /* |
305 | * sockfs_dname() is called from d_path(). | |
306 | */ | |
307 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
308 | { | |
309 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
310 | dentry->d_inode->i_ino); | |
311 | } | |
312 | ||
3ba13d17 | 313 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 314 | .d_dname = sockfs_dname, |
1da177e4 LT |
315 | }; |
316 | ||
c74a1cbb AV |
317 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
318 | int flags, const char *dev_name, void *data) | |
319 | { | |
320 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
321 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
322 | } | |
323 | ||
324 | static struct vfsmount *sock_mnt __read_mostly; | |
325 | ||
326 | static struct file_system_type sock_fs_type = { | |
327 | .name = "sockfs", | |
328 | .mount = sockfs_mount, | |
329 | .kill_sb = kill_anon_super, | |
330 | }; | |
331 | ||
1da177e4 LT |
332 | /* |
333 | * Obtains the first available file descriptor and sets it up for use. | |
334 | * | |
39d8c1b6 DM |
335 | * These functions create file structures and maps them to fd space |
336 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
337 | * and file struct implicitly stored in sock->file. |
338 | * Note that another thread may close file descriptor before we return | |
339 | * from this function. We use the fact that now we do not refer | |
340 | * to socket after mapping. If one day we will need it, this | |
341 | * function will increment ref. count on file by 1. | |
342 | * | |
343 | * In any case returned fd MAY BE not valid! | |
344 | * This race condition is unavoidable | |
345 | * with shared fd spaces, we cannot solve it inside kernel, | |
346 | * but we take care of internal coherence yet. | |
347 | */ | |
348 | ||
aab174f0 | 349 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 350 | { |
7cbe66b6 | 351 | struct qstr name = { .name = "" }; |
2c48b9c4 | 352 | struct path path; |
7cbe66b6 | 353 | struct file *file; |
1da177e4 | 354 | |
600e1779 MY |
355 | if (dname) { |
356 | name.name = dname; | |
357 | name.len = strlen(name.name); | |
358 | } else if (sock->sk) { | |
359 | name.name = sock->sk->sk_prot_creator->name; | |
360 | name.len = strlen(name.name); | |
361 | } | |
4b936885 | 362 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
363 | if (unlikely(!path.dentry)) |
364 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 365 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 366 | |
2c48b9c4 | 367 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 368 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 369 | |
2c48b9c4 | 370 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 371 | &socket_file_ops); |
39b65252 | 372 | if (unlikely(IS_ERR(file))) { |
cc3808f8 | 373 | /* drop dentry, keep inode */ |
7de9c6ee | 374 | ihold(path.dentry->d_inode); |
2c48b9c4 | 375 | path_put(&path); |
39b65252 | 376 | return file; |
cc3808f8 AV |
377 | } |
378 | ||
379 | sock->file = file; | |
77d27200 | 380 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 381 | file->private_data = sock; |
28407630 | 382 | return file; |
39d8c1b6 | 383 | } |
56b31d1c | 384 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 385 | |
56b31d1c | 386 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
387 | { |
388 | struct file *newfile; | |
28407630 AV |
389 | int fd = get_unused_fd_flags(flags); |
390 | if (unlikely(fd < 0)) | |
391 | return fd; | |
39d8c1b6 | 392 | |
aab174f0 | 393 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 394 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 395 | fd_install(fd, newfile); |
28407630 AV |
396 | return fd; |
397 | } | |
7cbe66b6 | 398 | |
28407630 AV |
399 | put_unused_fd(fd); |
400 | return PTR_ERR(newfile); | |
1da177e4 LT |
401 | } |
402 | ||
406a3c63 | 403 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 404 | { |
6cb153ca BL |
405 | if (file->f_op == &socket_file_ops) |
406 | return file->private_data; /* set in sock_map_fd */ | |
407 | ||
23bb80d2 ED |
408 | *err = -ENOTSOCK; |
409 | return NULL; | |
6cb153ca | 410 | } |
406a3c63 | 411 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 412 | |
1da177e4 | 413 | /** |
c6d409cf | 414 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
415 | * @fd: file handle |
416 | * @err: pointer to an error code return | |
417 | * | |
418 | * The file handle passed in is locked and the socket it is bound | |
419 | * too is returned. If an error occurs the err pointer is overwritten | |
420 | * with a negative errno code and NULL is returned. The function checks | |
421 | * for both invalid handles and passing a handle which is not a socket. | |
422 | * | |
423 | * On a success the socket object pointer is returned. | |
424 | */ | |
425 | ||
426 | struct socket *sockfd_lookup(int fd, int *err) | |
427 | { | |
428 | struct file *file; | |
1da177e4 LT |
429 | struct socket *sock; |
430 | ||
89bddce5 SH |
431 | file = fget(fd); |
432 | if (!file) { | |
1da177e4 LT |
433 | *err = -EBADF; |
434 | return NULL; | |
435 | } | |
89bddce5 | 436 | |
6cb153ca BL |
437 | sock = sock_from_file(file, err); |
438 | if (!sock) | |
1da177e4 | 439 | fput(file); |
6cb153ca BL |
440 | return sock; |
441 | } | |
c6d409cf | 442 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 443 | |
6cb153ca BL |
444 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
445 | { | |
446 | struct file *file; | |
447 | struct socket *sock; | |
448 | ||
3672558c | 449 | *err = -EBADF; |
6cb153ca BL |
450 | file = fget_light(fd, fput_needed); |
451 | if (file) { | |
452 | sock = sock_from_file(file, err); | |
453 | if (sock) | |
454 | return sock; | |
455 | fput_light(file, *fput_needed); | |
1da177e4 | 456 | } |
6cb153ca | 457 | return NULL; |
1da177e4 LT |
458 | } |
459 | ||
600e1779 MY |
460 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
461 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
462 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
463 | static ssize_t sockfs_getxattr(struct dentry *dentry, | |
464 | const char *name, void *value, size_t size) | |
465 | { | |
466 | const char *proto_name; | |
467 | size_t proto_size; | |
468 | int error; | |
469 | ||
470 | error = -ENODATA; | |
471 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { | |
472 | proto_name = dentry->d_name.name; | |
473 | proto_size = strlen(proto_name); | |
474 | ||
475 | if (value) { | |
476 | error = -ERANGE; | |
477 | if (proto_size + 1 > size) | |
478 | goto out; | |
479 | ||
480 | strncpy(value, proto_name, proto_size + 1); | |
481 | } | |
482 | error = proto_size + 1; | |
483 | } | |
484 | ||
485 | out: | |
486 | return error; | |
487 | } | |
488 | ||
489 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, | |
490 | size_t size) | |
491 | { | |
492 | ssize_t len; | |
493 | ssize_t used = 0; | |
494 | ||
495 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); | |
496 | if (len < 0) | |
497 | return len; | |
498 | used += len; | |
499 | if (buffer) { | |
500 | if (size < used) | |
501 | return -ERANGE; | |
502 | buffer += len; | |
503 | } | |
504 | ||
505 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
506 | used += len; | |
507 | if (buffer) { | |
508 | if (size < used) | |
509 | return -ERANGE; | |
510 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
511 | buffer += len; | |
512 | } | |
513 | ||
514 | return used; | |
515 | } | |
516 | ||
517 | static const struct inode_operations sockfs_inode_ops = { | |
518 | .getxattr = sockfs_getxattr, | |
519 | .listxattr = sockfs_listxattr, | |
520 | }; | |
521 | ||
1da177e4 LT |
522 | /** |
523 | * sock_alloc - allocate a socket | |
89bddce5 | 524 | * |
1da177e4 LT |
525 | * Allocate a new inode and socket object. The two are bound together |
526 | * and initialised. The socket is then returned. If we are out of inodes | |
527 | * NULL is returned. | |
528 | */ | |
529 | ||
530 | static struct socket *sock_alloc(void) | |
531 | { | |
89bddce5 SH |
532 | struct inode *inode; |
533 | struct socket *sock; | |
1da177e4 | 534 | |
a209dfc7 | 535 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
536 | if (!inode) |
537 | return NULL; | |
538 | ||
539 | sock = SOCKET_I(inode); | |
540 | ||
29a020d3 | 541 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 542 | inode->i_ino = get_next_ino(); |
89bddce5 | 543 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
544 | inode->i_uid = current_fsuid(); |
545 | inode->i_gid = current_fsgid(); | |
600e1779 | 546 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 547 | |
19e8d69c | 548 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
549 | return sock; |
550 | } | |
551 | ||
552 | /* | |
553 | * In theory you can't get an open on this inode, but /proc provides | |
554 | * a back door. Remember to keep it shut otherwise you'll let the | |
555 | * creepy crawlies in. | |
556 | */ | |
89bddce5 | 557 | |
1da177e4 LT |
558 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
559 | { | |
560 | return -ENXIO; | |
561 | } | |
562 | ||
4b6f5d20 | 563 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
564 | .owner = THIS_MODULE, |
565 | .open = sock_no_open, | |
6038f373 | 566 | .llseek = noop_llseek, |
1da177e4 LT |
567 | }; |
568 | ||
569 | /** | |
570 | * sock_release - close a socket | |
571 | * @sock: socket to close | |
572 | * | |
573 | * The socket is released from the protocol stack if it has a release | |
574 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 575 | * an inode not a file. |
1da177e4 | 576 | */ |
89bddce5 | 577 | |
1da177e4 LT |
578 | void sock_release(struct socket *sock) |
579 | { | |
580 | if (sock->ops) { | |
581 | struct module *owner = sock->ops->owner; | |
582 | ||
583 | sock->ops->release(sock); | |
584 | sock->ops = NULL; | |
585 | module_put(owner); | |
586 | } | |
587 | ||
eaefd110 | 588 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
1da177e4 LT |
589 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
590 | ||
b09e786b MP |
591 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
592 | return; | |
593 | ||
19e8d69c | 594 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
595 | if (!sock->file) { |
596 | iput(SOCK_INODE(sock)); | |
597 | return; | |
598 | } | |
89bddce5 | 599 | sock->file = NULL; |
1da177e4 | 600 | } |
c6d409cf | 601 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 602 | |
bf84a010 | 603 | void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 604 | { |
2244d07b | 605 | *tx_flags = 0; |
20d49473 | 606 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 607 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 608 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 609 | *tx_flags |= SKBTX_SW_TSTAMP; |
6e3e939f JB |
610 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
611 | *tx_flags |= SKBTX_WIFI_STATUS; | |
20d49473 PO |
612 | } |
613 | EXPORT_SYMBOL(sock_tx_timestamp); | |
614 | ||
228e548e AB |
615 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
616 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
617 | { |
618 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 LT |
619 | |
620 | si->sock = sock; | |
621 | si->scm = NULL; | |
622 | si->msg = msg; | |
623 | si->size = size; | |
624 | ||
1da177e4 LT |
625 | return sock->ops->sendmsg(iocb, sock, msg, size); |
626 | } | |
627 | ||
228e548e AB |
628 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
629 | struct msghdr *msg, size_t size) | |
630 | { | |
631 | int err = security_socket_sendmsg(sock, msg, size); | |
632 | ||
633 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
634 | } | |
635 | ||
1da177e4 LT |
636 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
637 | { | |
638 | struct kiocb iocb; | |
639 | struct sock_iocb siocb; | |
640 | int ret; | |
641 | ||
642 | init_sync_kiocb(&iocb, NULL); | |
643 | iocb.private = &siocb; | |
644 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
645 | if (-EIOCBQUEUED == ret) | |
646 | ret = wait_on_sync_kiocb(&iocb); | |
647 | return ret; | |
648 | } | |
c6d409cf | 649 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 650 | |
894dc24c | 651 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
652 | { |
653 | struct kiocb iocb; | |
654 | struct sock_iocb siocb; | |
655 | int ret; | |
656 | ||
657 | init_sync_kiocb(&iocb, NULL); | |
658 | iocb.private = &siocb; | |
659 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
660 | if (-EIOCBQUEUED == ret) | |
661 | ret = wait_on_sync_kiocb(&iocb); | |
662 | return ret; | |
663 | } | |
664 | ||
1da177e4 LT |
665 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
666 | struct kvec *vec, size_t num, size_t size) | |
667 | { | |
668 | mm_segment_t oldfs = get_fs(); | |
669 | int result; | |
670 | ||
671 | set_fs(KERNEL_DS); | |
672 | /* | |
673 | * the following is safe, since for compiler definitions of kvec and | |
674 | * iovec are identical, yielding the same in-core layout and alignment | |
675 | */ | |
89bddce5 | 676 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
677 | msg->msg_iovlen = num; |
678 | result = sock_sendmsg(sock, msg, size); | |
679 | set_fs(oldfs); | |
680 | return result; | |
681 | } | |
c6d409cf | 682 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 683 | |
92f37fd2 ED |
684 | /* |
685 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
686 | */ | |
687 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
688 | struct sk_buff *skb) | |
689 | { | |
20d49473 PO |
690 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
691 | struct timespec ts[3]; | |
692 | int empty = 1; | |
693 | struct skb_shared_hwtstamps *shhwtstamps = | |
694 | skb_hwtstamps(skb); | |
695 | ||
696 | /* Race occurred between timestamp enabling and packet | |
697 | receiving. Fill in the current time for now. */ | |
698 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
699 | __net_timestamp(skb); | |
700 | ||
701 | if (need_software_tstamp) { | |
702 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
703 | struct timeval tv; | |
704 | skb_get_timestamp(skb, &tv); | |
705 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
706 | sizeof(tv), &tv); | |
707 | } else { | |
842509b8 | 708 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 709 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 710 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
711 | } |
712 | } | |
713 | ||
714 | ||
715 | memset(ts, 0, sizeof(ts)); | |
6e94d1ef DB |
716 | if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) && |
717 | ktime_to_timespec_cond(skb->tstamp, ts + 0)) | |
20d49473 | 718 | empty = 0; |
20d49473 PO |
719 | if (shhwtstamps) { |
720 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
6e94d1ef | 721 | ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1)) |
20d49473 PO |
722 | empty = 0; |
723 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
6e94d1ef | 724 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) |
20d49473 | 725 | empty = 0; |
92f37fd2 | 726 | } |
20d49473 PO |
727 | if (!empty) |
728 | put_cmsg(msg, SOL_SOCKET, | |
729 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 730 | } |
7c81fd8b ACM |
731 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
732 | ||
6e3e939f JB |
733 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
734 | struct sk_buff *skb) | |
735 | { | |
736 | int ack; | |
737 | ||
738 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
739 | return; | |
740 | if (!skb->wifi_acked_valid) | |
741 | return; | |
742 | ||
743 | ack = skb->wifi_acked; | |
744 | ||
745 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
746 | } | |
747 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
748 | ||
11165f14 | 749 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
750 | struct sk_buff *skb) | |
3b885787 NH |
751 | { |
752 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
753 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
754 | sizeof(__u32), &skb->dropcount); | |
755 | } | |
756 | ||
767dd033 | 757 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
758 | struct sk_buff *skb) |
759 | { | |
760 | sock_recv_timestamp(msg, sk, skb); | |
761 | sock_recv_drops(msg, sk, skb); | |
762 | } | |
767dd033 | 763 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 764 | |
a2e27255 ACM |
765 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
766 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 767 | { |
1da177e4 LT |
768 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
769 | ||
770 | si->sock = sock; | |
771 | si->scm = NULL; | |
772 | si->msg = msg; | |
773 | si->size = size; | |
774 | si->flags = flags; | |
775 | ||
1da177e4 LT |
776 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
777 | } | |
778 | ||
a2e27255 ACM |
779 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
780 | struct msghdr *msg, size_t size, int flags) | |
781 | { | |
782 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
783 | ||
784 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
785 | } | |
786 | ||
89bddce5 | 787 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
788 | size_t size, int flags) |
789 | { | |
790 | struct kiocb iocb; | |
791 | struct sock_iocb siocb; | |
792 | int ret; | |
793 | ||
89bddce5 | 794 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
795 | iocb.private = &siocb; |
796 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
797 | if (-EIOCBQUEUED == ret) | |
798 | ret = wait_on_sync_kiocb(&iocb); | |
799 | return ret; | |
800 | } | |
c6d409cf | 801 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 802 | |
a2e27255 ACM |
803 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
804 | size_t size, int flags) | |
805 | { | |
806 | struct kiocb iocb; | |
807 | struct sock_iocb siocb; | |
808 | int ret; | |
809 | ||
810 | init_sync_kiocb(&iocb, NULL); | |
811 | iocb.private = &siocb; | |
812 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
813 | if (-EIOCBQUEUED == ret) | |
814 | ret = wait_on_sync_kiocb(&iocb); | |
815 | return ret; | |
816 | } | |
817 | ||
c1249c0a ML |
818 | /** |
819 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
820 | * @sock: The socket to receive the message from | |
821 | * @msg: Received message | |
822 | * @vec: Input s/g array for message data | |
823 | * @num: Size of input s/g array | |
824 | * @size: Number of bytes to read | |
825 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
826 | * | |
827 | * On return the msg structure contains the scatter/gather array passed in the | |
828 | * vec argument. The array is modified so that it consists of the unfilled | |
829 | * portion of the original array. | |
830 | * | |
831 | * The returned value is the total number of bytes received, or an error. | |
832 | */ | |
89bddce5 SH |
833 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
834 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
835 | { |
836 | mm_segment_t oldfs = get_fs(); | |
837 | int result; | |
838 | ||
839 | set_fs(KERNEL_DS); | |
840 | /* | |
841 | * the following is safe, since for compiler definitions of kvec and | |
842 | * iovec are identical, yielding the same in-core layout and alignment | |
843 | */ | |
89bddce5 | 844 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
845 | result = sock_recvmsg(sock, msg, size, flags); |
846 | set_fs(oldfs); | |
847 | return result; | |
848 | } | |
c6d409cf | 849 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 LT |
850 | |
851 | static void sock_aio_dtor(struct kiocb *iocb) | |
852 | { | |
853 | kfree(iocb->private); | |
854 | } | |
855 | ||
ce1d4d3e CH |
856 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
857 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 858 | { |
1da177e4 LT |
859 | struct socket *sock; |
860 | int flags; | |
861 | ||
ce1d4d3e CH |
862 | sock = file->private_data; |
863 | ||
35f9c09f ED |
864 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
865 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
866 | flags |= more; | |
ce1d4d3e | 867 | |
e6949583 | 868 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 869 | } |
1da177e4 | 870 | |
9c55e01c | 871 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 872 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
873 | unsigned int flags) |
874 | { | |
875 | struct socket *sock = file->private_data; | |
876 | ||
997b37da RDC |
877 | if (unlikely(!sock->ops->splice_read)) |
878 | return -EINVAL; | |
879 | ||
9c55e01c JA |
880 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
881 | } | |
882 | ||
ce1d4d3e | 883 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 884 | struct sock_iocb *siocb) |
ce1d4d3e CH |
885 | { |
886 | if (!is_sync_kiocb(iocb)) { | |
887 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
888 | if (!siocb) | |
889 | return NULL; | |
1da177e4 LT |
890 | iocb->ki_dtor = sock_aio_dtor; |
891 | } | |
1da177e4 | 892 | |
ce1d4d3e | 893 | siocb->kiocb = iocb; |
ce1d4d3e CH |
894 | iocb->private = siocb; |
895 | return siocb; | |
1da177e4 LT |
896 | } |
897 | ||
ce1d4d3e | 898 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
899 | struct file *file, const struct iovec *iov, |
900 | unsigned long nr_segs) | |
ce1d4d3e CH |
901 | { |
902 | struct socket *sock = file->private_data; | |
903 | size_t size = 0; | |
904 | int i; | |
1da177e4 | 905 | |
89bddce5 SH |
906 | for (i = 0; i < nr_segs; i++) |
907 | size += iov[i].iov_len; | |
1da177e4 | 908 | |
ce1d4d3e CH |
909 | msg->msg_name = NULL; |
910 | msg->msg_namelen = 0; | |
911 | msg->msg_control = NULL; | |
912 | msg->msg_controllen = 0; | |
89bddce5 | 913 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
914 | msg->msg_iovlen = nr_segs; |
915 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
916 | ||
917 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
918 | } | |
919 | ||
027445c3 BP |
920 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
921 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
922 | { |
923 | struct sock_iocb siocb, *x; | |
924 | ||
1da177e4 LT |
925 | if (pos != 0) |
926 | return -ESPIPE; | |
027445c3 BP |
927 | |
928 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
929 | return 0; |
930 | ||
027445c3 BP |
931 | |
932 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
933 | if (!x) |
934 | return -ENOMEM; | |
027445c3 | 935 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
936 | } |
937 | ||
ce1d4d3e | 938 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
939 | struct file *file, const struct iovec *iov, |
940 | unsigned long nr_segs) | |
1da177e4 | 941 | { |
ce1d4d3e CH |
942 | struct socket *sock = file->private_data; |
943 | size_t size = 0; | |
944 | int i; | |
1da177e4 | 945 | |
89bddce5 SH |
946 | for (i = 0; i < nr_segs; i++) |
947 | size += iov[i].iov_len; | |
1da177e4 | 948 | |
ce1d4d3e CH |
949 | msg->msg_name = NULL; |
950 | msg->msg_namelen = 0; | |
951 | msg->msg_control = NULL; | |
952 | msg->msg_controllen = 0; | |
89bddce5 | 953 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
954 | msg->msg_iovlen = nr_segs; |
955 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
956 | if (sock->type == SOCK_SEQPACKET) | |
957 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 958 | |
ce1d4d3e | 959 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
960 | } |
961 | ||
027445c3 BP |
962 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
963 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
964 | { |
965 | struct sock_iocb siocb, *x; | |
1da177e4 | 966 | |
ce1d4d3e CH |
967 | if (pos != 0) |
968 | return -ESPIPE; | |
027445c3 | 969 | |
027445c3 | 970 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
971 | if (!x) |
972 | return -ENOMEM; | |
1da177e4 | 973 | |
027445c3 | 974 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
975 | } |
976 | ||
1da177e4 LT |
977 | /* |
978 | * Atomic setting of ioctl hooks to avoid race | |
979 | * with module unload. | |
980 | */ | |
981 | ||
4a3e2f71 | 982 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 983 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 984 | |
881d966b | 985 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 986 | { |
4a3e2f71 | 987 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 988 | br_ioctl_hook = hook; |
4a3e2f71 | 989 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
990 | } |
991 | EXPORT_SYMBOL(brioctl_set); | |
992 | ||
4a3e2f71 | 993 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 994 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 995 | |
881d966b | 996 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 997 | { |
4a3e2f71 | 998 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 999 | vlan_ioctl_hook = hook; |
4a3e2f71 | 1000 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
1001 | } |
1002 | EXPORT_SYMBOL(vlan_ioctl_set); | |
1003 | ||
4a3e2f71 | 1004 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 1005 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 1006 | |
89bddce5 | 1007 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 1008 | { |
4a3e2f71 | 1009 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 1010 | dlci_ioctl_hook = hook; |
4a3e2f71 | 1011 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1012 | } |
1013 | EXPORT_SYMBOL(dlci_ioctl_set); | |
1014 | ||
6b96018b AB |
1015 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
1016 | unsigned int cmd, unsigned long arg) | |
1017 | { | |
1018 | int err; | |
1019 | void __user *argp = (void __user *)arg; | |
1020 | ||
1021 | err = sock->ops->ioctl(sock, cmd, arg); | |
1022 | ||
1023 | /* | |
1024 | * If this ioctl is unknown try to hand it down | |
1025 | * to the NIC driver. | |
1026 | */ | |
1027 | if (err == -ENOIOCTLCMD) | |
1028 | err = dev_ioctl(net, cmd, argp); | |
1029 | ||
1030 | return err; | |
1031 | } | |
1032 | ||
1da177e4 LT |
1033 | /* |
1034 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1035 | * what to do with it - that's up to the protocol still. | |
1036 | */ | |
1037 | ||
1038 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1039 | { | |
1040 | struct socket *sock; | |
881d966b | 1041 | struct sock *sk; |
1da177e4 LT |
1042 | void __user *argp = (void __user *)arg; |
1043 | int pid, err; | |
881d966b | 1044 | struct net *net; |
1da177e4 | 1045 | |
b69aee04 | 1046 | sock = file->private_data; |
881d966b | 1047 | sk = sock->sk; |
3b1e0a65 | 1048 | net = sock_net(sk); |
1da177e4 | 1049 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1050 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1051 | } else |
3d23e349 | 1052 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1053 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1054 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1055 | } else |
3d23e349 | 1056 | #endif |
89bddce5 | 1057 | switch (cmd) { |
1da177e4 LT |
1058 | case FIOSETOWN: |
1059 | case SIOCSPGRP: | |
1060 | err = -EFAULT; | |
1061 | if (get_user(pid, (int __user *)argp)) | |
1062 | break; | |
1063 | err = f_setown(sock->file, pid, 1); | |
1064 | break; | |
1065 | case FIOGETOWN: | |
1066 | case SIOCGPGRP: | |
609d7fa9 | 1067 | err = put_user(f_getown(sock->file), |
89bddce5 | 1068 | (int __user *)argp); |
1da177e4 LT |
1069 | break; |
1070 | case SIOCGIFBR: | |
1071 | case SIOCSIFBR: | |
1072 | case SIOCBRADDBR: | |
1073 | case SIOCBRDELBR: | |
1074 | err = -ENOPKG; | |
1075 | if (!br_ioctl_hook) | |
1076 | request_module("bridge"); | |
1077 | ||
4a3e2f71 | 1078 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1079 | if (br_ioctl_hook) |
881d966b | 1080 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1081 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1082 | break; |
1083 | case SIOCGIFVLAN: | |
1084 | case SIOCSIFVLAN: | |
1085 | err = -ENOPKG; | |
1086 | if (!vlan_ioctl_hook) | |
1087 | request_module("8021q"); | |
1088 | ||
4a3e2f71 | 1089 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1090 | if (vlan_ioctl_hook) |
881d966b | 1091 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1092 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1093 | break; |
1da177e4 LT |
1094 | case SIOCADDDLCI: |
1095 | case SIOCDELDLCI: | |
1096 | err = -ENOPKG; | |
1097 | if (!dlci_ioctl_hook) | |
1098 | request_module("dlci"); | |
1099 | ||
7512cbf6 PE |
1100 | mutex_lock(&dlci_ioctl_mutex); |
1101 | if (dlci_ioctl_hook) | |
1da177e4 | 1102 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1103 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1104 | break; |
1105 | default: | |
6b96018b | 1106 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1107 | break; |
89bddce5 | 1108 | } |
1da177e4 LT |
1109 | return err; |
1110 | } | |
1111 | ||
1112 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1113 | { | |
1114 | int err; | |
1115 | struct socket *sock = NULL; | |
89bddce5 | 1116 | |
1da177e4 LT |
1117 | err = security_socket_create(family, type, protocol, 1); |
1118 | if (err) | |
1119 | goto out; | |
1120 | ||
1121 | sock = sock_alloc(); | |
1122 | if (!sock) { | |
1123 | err = -ENOMEM; | |
1124 | goto out; | |
1125 | } | |
1126 | ||
1da177e4 | 1127 | sock->type = type; |
7420ed23 VY |
1128 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1129 | if (err) | |
1130 | goto out_release; | |
1131 | ||
1da177e4 LT |
1132 | out: |
1133 | *res = sock; | |
1134 | return err; | |
7420ed23 VY |
1135 | out_release: |
1136 | sock_release(sock); | |
1137 | sock = NULL; | |
1138 | goto out; | |
1da177e4 | 1139 | } |
c6d409cf | 1140 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1141 | |
1142 | /* No kernel lock held - perfect */ | |
89bddce5 | 1143 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1144 | { |
1145 | struct socket *sock; | |
1146 | ||
1147 | /* | |
89bddce5 | 1148 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1149 | */ |
b69aee04 | 1150 | sock = file->private_data; |
1da177e4 LT |
1151 | return sock->ops->poll(file, sock, wait); |
1152 | } | |
1153 | ||
89bddce5 | 1154 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1155 | { |
b69aee04 | 1156 | struct socket *sock = file->private_data; |
1da177e4 LT |
1157 | |
1158 | return sock->ops->mmap(file, sock, vma); | |
1159 | } | |
1160 | ||
20380731 | 1161 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1162 | { |
1da177e4 LT |
1163 | sock_release(SOCKET_I(inode)); |
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * Update the socket async list | |
1169 | * | |
1170 | * Fasync_list locking strategy. | |
1171 | * | |
1172 | * 1. fasync_list is modified only under process context socket lock | |
1173 | * i.e. under semaphore. | |
1174 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1175 | * or under socket lock |
1da177e4 LT |
1176 | */ |
1177 | ||
1178 | static int sock_fasync(int fd, struct file *filp, int on) | |
1179 | { | |
989a2979 ED |
1180 | struct socket *sock = filp->private_data; |
1181 | struct sock *sk = sock->sk; | |
eaefd110 | 1182 | struct socket_wq *wq; |
1da177e4 | 1183 | |
989a2979 | 1184 | if (sk == NULL) |
1da177e4 | 1185 | return -EINVAL; |
1da177e4 LT |
1186 | |
1187 | lock_sock(sk); | |
eaefd110 ED |
1188 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1189 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1190 | |
eaefd110 | 1191 | if (!wq->fasync_list) |
989a2979 ED |
1192 | sock_reset_flag(sk, SOCK_FASYNC); |
1193 | else | |
bcdce719 | 1194 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1195 | |
989a2979 | 1196 | release_sock(sk); |
1da177e4 LT |
1197 | return 0; |
1198 | } | |
1199 | ||
43815482 | 1200 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1201 | |
1202 | int sock_wake_async(struct socket *sock, int how, int band) | |
1203 | { | |
43815482 ED |
1204 | struct socket_wq *wq; |
1205 | ||
1206 | if (!sock) | |
1207 | return -1; | |
1208 | rcu_read_lock(); | |
1209 | wq = rcu_dereference(sock->wq); | |
1210 | if (!wq || !wq->fasync_list) { | |
1211 | rcu_read_unlock(); | |
1da177e4 | 1212 | return -1; |
43815482 | 1213 | } |
89bddce5 | 1214 | switch (how) { |
8d8ad9d7 | 1215 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1216 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1217 | break; | |
1218 | goto call_kill; | |
8d8ad9d7 | 1219 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1220 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1221 | break; | |
1222 | /* fall through */ | |
8d8ad9d7 | 1223 | case SOCK_WAKE_IO: |
89bddce5 | 1224 | call_kill: |
43815482 | 1225 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1226 | break; |
8d8ad9d7 | 1227 | case SOCK_WAKE_URG: |
43815482 | 1228 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1229 | } |
43815482 | 1230 | rcu_read_unlock(); |
1da177e4 LT |
1231 | return 0; |
1232 | } | |
c6d409cf | 1233 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1234 | |
721db93a | 1235 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1236 | struct socket **res, int kern) |
1da177e4 LT |
1237 | { |
1238 | int err; | |
1239 | struct socket *sock; | |
55737fda | 1240 | const struct net_proto_family *pf; |
1da177e4 LT |
1241 | |
1242 | /* | |
89bddce5 | 1243 | * Check protocol is in range |
1da177e4 LT |
1244 | */ |
1245 | if (family < 0 || family >= NPROTO) | |
1246 | return -EAFNOSUPPORT; | |
1247 | if (type < 0 || type >= SOCK_MAX) | |
1248 | return -EINVAL; | |
1249 | ||
1250 | /* Compatibility. | |
1251 | ||
1252 | This uglymoron is moved from INET layer to here to avoid | |
1253 | deadlock in module load. | |
1254 | */ | |
1255 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1256 | static int warned; |
1da177e4 LT |
1257 | if (!warned) { |
1258 | warned = 1; | |
89bddce5 SH |
1259 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1260 | current->comm); | |
1da177e4 LT |
1261 | } |
1262 | family = PF_PACKET; | |
1263 | } | |
1264 | ||
1265 | err = security_socket_create(family, type, protocol, kern); | |
1266 | if (err) | |
1267 | return err; | |
89bddce5 | 1268 | |
55737fda SH |
1269 | /* |
1270 | * Allocate the socket and allow the family to set things up. if | |
1271 | * the protocol is 0, the family is instructed to select an appropriate | |
1272 | * default. | |
1273 | */ | |
1274 | sock = sock_alloc(); | |
1275 | if (!sock) { | |
e87cc472 | 1276 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1277 | return -ENFILE; /* Not exactly a match, but its the |
1278 | closest posix thing */ | |
1279 | } | |
1280 | ||
1281 | sock->type = type; | |
1282 | ||
95a5afca | 1283 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1284 | /* Attempt to load a protocol module if the find failed. |
1285 | * | |
1286 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1287 | * requested real, full-featured networking support upon configuration. |
1288 | * Otherwise module support will break! | |
1289 | */ | |
190683a9 | 1290 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1291 | request_module("net-pf-%d", family); |
1da177e4 LT |
1292 | #endif |
1293 | ||
55737fda SH |
1294 | rcu_read_lock(); |
1295 | pf = rcu_dereference(net_families[family]); | |
1296 | err = -EAFNOSUPPORT; | |
1297 | if (!pf) | |
1298 | goto out_release; | |
1da177e4 LT |
1299 | |
1300 | /* | |
1301 | * We will call the ->create function, that possibly is in a loadable | |
1302 | * module, so we have to bump that loadable module refcnt first. | |
1303 | */ | |
55737fda | 1304 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1305 | goto out_release; |
1306 | ||
55737fda SH |
1307 | /* Now protected by module ref count */ |
1308 | rcu_read_unlock(); | |
1309 | ||
3f378b68 | 1310 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1311 | if (err < 0) |
1da177e4 | 1312 | goto out_module_put; |
a79af59e | 1313 | |
1da177e4 LT |
1314 | /* |
1315 | * Now to bump the refcnt of the [loadable] module that owns this | |
1316 | * socket at sock_release time we decrement its refcnt. | |
1317 | */ | |
55737fda SH |
1318 | if (!try_module_get(sock->ops->owner)) |
1319 | goto out_module_busy; | |
1320 | ||
1da177e4 LT |
1321 | /* |
1322 | * Now that we're done with the ->create function, the [loadable] | |
1323 | * module can have its refcnt decremented | |
1324 | */ | |
55737fda | 1325 | module_put(pf->owner); |
7420ed23 VY |
1326 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1327 | if (err) | |
3b185525 | 1328 | goto out_sock_release; |
55737fda | 1329 | *res = sock; |
1da177e4 | 1330 | |
55737fda SH |
1331 | return 0; |
1332 | ||
1333 | out_module_busy: | |
1334 | err = -EAFNOSUPPORT; | |
1da177e4 | 1335 | out_module_put: |
55737fda SH |
1336 | sock->ops = NULL; |
1337 | module_put(pf->owner); | |
1338 | out_sock_release: | |
1da177e4 | 1339 | sock_release(sock); |
55737fda SH |
1340 | return err; |
1341 | ||
1342 | out_release: | |
1343 | rcu_read_unlock(); | |
1344 | goto out_sock_release; | |
1da177e4 | 1345 | } |
721db93a | 1346 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1347 | |
1348 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1349 | { | |
1b8d7ae4 | 1350 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1351 | } |
c6d409cf | 1352 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1353 | |
1354 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1355 | { | |
1b8d7ae4 | 1356 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1357 | } |
c6d409cf | 1358 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1359 | |
3e0fa65f | 1360 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1361 | { |
1362 | int retval; | |
1363 | struct socket *sock; | |
a677a039 UD |
1364 | int flags; |
1365 | ||
e38b36f3 UD |
1366 | /* Check the SOCK_* constants for consistency. */ |
1367 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1368 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1369 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1370 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1371 | ||
a677a039 | 1372 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1373 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1374 | return -EINVAL; |
1375 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1376 | |
aaca0bdc UD |
1377 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1378 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1379 | ||
1da177e4 LT |
1380 | retval = sock_create(family, type, protocol, &sock); |
1381 | if (retval < 0) | |
1382 | goto out; | |
1383 | ||
77d27200 | 1384 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1385 | if (retval < 0) |
1386 | goto out_release; | |
1387 | ||
1388 | out: | |
1389 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1390 | return retval; | |
1391 | ||
1392 | out_release: | |
1393 | sock_release(sock); | |
1394 | return retval; | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * Create a pair of connected sockets. | |
1399 | */ | |
1400 | ||
3e0fa65f HC |
1401 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1402 | int __user *, usockvec) | |
1da177e4 LT |
1403 | { |
1404 | struct socket *sock1, *sock2; | |
1405 | int fd1, fd2, err; | |
db349509 | 1406 | struct file *newfile1, *newfile2; |
a677a039 UD |
1407 | int flags; |
1408 | ||
1409 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1410 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1411 | return -EINVAL; |
1412 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1413 | |
aaca0bdc UD |
1414 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1415 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1416 | ||
1da177e4 LT |
1417 | /* |
1418 | * Obtain the first socket and check if the underlying protocol | |
1419 | * supports the socketpair call. | |
1420 | */ | |
1421 | ||
1422 | err = sock_create(family, type, protocol, &sock1); | |
1423 | if (err < 0) | |
1424 | goto out; | |
1425 | ||
1426 | err = sock_create(family, type, protocol, &sock2); | |
1427 | if (err < 0) | |
1428 | goto out_release_1; | |
1429 | ||
1430 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1431 | if (err < 0) |
1da177e4 LT |
1432 | goto out_release_both; |
1433 | ||
28407630 | 1434 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1435 | if (unlikely(fd1 < 0)) { |
1436 | err = fd1; | |
db349509 | 1437 | goto out_release_both; |
bf3c23d1 | 1438 | } |
28407630 | 1439 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1440 | if (unlikely(fd2 < 0)) { |
1441 | err = fd2; | |
28407630 AV |
1442 | put_unused_fd(fd1); |
1443 | goto out_release_both; | |
1444 | } | |
1445 | ||
aab174f0 | 1446 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
28407630 AV |
1447 | if (unlikely(IS_ERR(newfile1))) { |
1448 | err = PTR_ERR(newfile1); | |
1449 | put_unused_fd(fd1); | |
1450 | put_unused_fd(fd2); | |
1451 | goto out_release_both; | |
1452 | } | |
1453 | ||
aab174f0 | 1454 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1455 | if (IS_ERR(newfile2)) { |
1456 | err = PTR_ERR(newfile2); | |
198de4d7 AV |
1457 | fput(newfile1); |
1458 | put_unused_fd(fd1); | |
28407630 | 1459 | put_unused_fd(fd2); |
198de4d7 AV |
1460 | sock_release(sock2); |
1461 | goto out; | |
db349509 AV |
1462 | } |
1463 | ||
157cf649 | 1464 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1465 | fd_install(fd1, newfile1); |
1466 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1467 | /* fd1 and fd2 may be already another descriptors. |
1468 | * Not kernel problem. | |
1469 | */ | |
1470 | ||
89bddce5 | 1471 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1472 | if (!err) |
1473 | err = put_user(fd2, &usockvec[1]); | |
1474 | if (!err) | |
1475 | return 0; | |
1476 | ||
1477 | sys_close(fd2); | |
1478 | sys_close(fd1); | |
1479 | return err; | |
1480 | ||
1da177e4 | 1481 | out_release_both: |
89bddce5 | 1482 | sock_release(sock2); |
1da177e4 | 1483 | out_release_1: |
89bddce5 | 1484 | sock_release(sock1); |
1da177e4 LT |
1485 | out: |
1486 | return err; | |
1487 | } | |
1488 | ||
1da177e4 LT |
1489 | /* |
1490 | * Bind a name to a socket. Nothing much to do here since it's | |
1491 | * the protocol's responsibility to handle the local address. | |
1492 | * | |
1493 | * We move the socket address to kernel space before we call | |
1494 | * the protocol layer (having also checked the address is ok). | |
1495 | */ | |
1496 | ||
20f37034 | 1497 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1498 | { |
1499 | struct socket *sock; | |
230b1839 | 1500 | struct sockaddr_storage address; |
6cb153ca | 1501 | int err, fput_needed; |
1da177e4 | 1502 | |
89bddce5 | 1503 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1504 | if (sock) { |
43db362d | 1505 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1506 | if (err >= 0) { |
1507 | err = security_socket_bind(sock, | |
230b1839 | 1508 | (struct sockaddr *)&address, |
89bddce5 | 1509 | addrlen); |
6cb153ca BL |
1510 | if (!err) |
1511 | err = sock->ops->bind(sock, | |
89bddce5 | 1512 | (struct sockaddr *) |
230b1839 | 1513 | &address, addrlen); |
1da177e4 | 1514 | } |
6cb153ca | 1515 | fput_light(sock->file, fput_needed); |
89bddce5 | 1516 | } |
1da177e4 LT |
1517 | return err; |
1518 | } | |
1519 | ||
1da177e4 LT |
1520 | /* |
1521 | * Perform a listen. Basically, we allow the protocol to do anything | |
1522 | * necessary for a listen, and if that works, we mark the socket as | |
1523 | * ready for listening. | |
1524 | */ | |
1525 | ||
3e0fa65f | 1526 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1527 | { |
1528 | struct socket *sock; | |
6cb153ca | 1529 | int err, fput_needed; |
b8e1f9b5 | 1530 | int somaxconn; |
89bddce5 SH |
1531 | |
1532 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1533 | if (sock) { | |
8efa6e93 | 1534 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1535 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1536 | backlog = somaxconn; |
1da177e4 LT |
1537 | |
1538 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1539 | if (!err) |
1540 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1541 | |
6cb153ca | 1542 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1543 | } |
1544 | return err; | |
1545 | } | |
1546 | ||
1da177e4 LT |
1547 | /* |
1548 | * For accept, we attempt to create a new socket, set up the link | |
1549 | * with the client, wake up the client, then return the new | |
1550 | * connected fd. We collect the address of the connector in kernel | |
1551 | * space and move it to user at the very end. This is unclean because | |
1552 | * we open the socket then return an error. | |
1553 | * | |
1554 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1555 | * status to recvmsg. We need to add that support in a way thats | |
1556 | * clean when we restucture accept also. | |
1557 | */ | |
1558 | ||
20f37034 HC |
1559 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1560 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1561 | { |
1562 | struct socket *sock, *newsock; | |
39d8c1b6 | 1563 | struct file *newfile; |
6cb153ca | 1564 | int err, len, newfd, fput_needed; |
230b1839 | 1565 | struct sockaddr_storage address; |
1da177e4 | 1566 | |
77d27200 | 1567 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1568 | return -EINVAL; |
1569 | ||
1570 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1571 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1572 | ||
6cb153ca | 1573 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1574 | if (!sock) |
1575 | goto out; | |
1576 | ||
1577 | err = -ENFILE; | |
c6d409cf ED |
1578 | newsock = sock_alloc(); |
1579 | if (!newsock) | |
1da177e4 LT |
1580 | goto out_put; |
1581 | ||
1582 | newsock->type = sock->type; | |
1583 | newsock->ops = sock->ops; | |
1584 | ||
1da177e4 LT |
1585 | /* |
1586 | * We don't need try_module_get here, as the listening socket (sock) | |
1587 | * has the protocol module (sock->ops->owner) held. | |
1588 | */ | |
1589 | __module_get(newsock->ops->owner); | |
1590 | ||
28407630 | 1591 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1592 | if (unlikely(newfd < 0)) { |
1593 | err = newfd; | |
9a1875e6 DM |
1594 | sock_release(newsock); |
1595 | goto out_put; | |
39d8c1b6 | 1596 | } |
aab174f0 | 1597 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
28407630 AV |
1598 | if (unlikely(IS_ERR(newfile))) { |
1599 | err = PTR_ERR(newfile); | |
1600 | put_unused_fd(newfd); | |
1601 | sock_release(newsock); | |
1602 | goto out_put; | |
1603 | } | |
39d8c1b6 | 1604 | |
a79af59e FF |
1605 | err = security_socket_accept(sock, newsock); |
1606 | if (err) | |
39d8c1b6 | 1607 | goto out_fd; |
a79af59e | 1608 | |
1da177e4 LT |
1609 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1610 | if (err < 0) | |
39d8c1b6 | 1611 | goto out_fd; |
1da177e4 LT |
1612 | |
1613 | if (upeer_sockaddr) { | |
230b1839 | 1614 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1615 | &len, 2) < 0) { |
1da177e4 | 1616 | err = -ECONNABORTED; |
39d8c1b6 | 1617 | goto out_fd; |
1da177e4 | 1618 | } |
43db362d | 1619 | err = move_addr_to_user(&address, |
230b1839 | 1620 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1621 | if (err < 0) |
39d8c1b6 | 1622 | goto out_fd; |
1da177e4 LT |
1623 | } |
1624 | ||
1625 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1626 | ||
39d8c1b6 DM |
1627 | fd_install(newfd, newfile); |
1628 | err = newfd; | |
1da177e4 | 1629 | |
1da177e4 | 1630 | out_put: |
6cb153ca | 1631 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1632 | out: |
1633 | return err; | |
39d8c1b6 | 1634 | out_fd: |
9606a216 | 1635 | fput(newfile); |
39d8c1b6 | 1636 | put_unused_fd(newfd); |
1da177e4 LT |
1637 | goto out_put; |
1638 | } | |
1639 | ||
20f37034 HC |
1640 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1641 | int __user *, upeer_addrlen) | |
aaca0bdc | 1642 | { |
de11defe | 1643 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1644 | } |
1645 | ||
1da177e4 LT |
1646 | /* |
1647 | * Attempt to connect to a socket with the server address. The address | |
1648 | * is in user space so we verify it is OK and move it to kernel space. | |
1649 | * | |
1650 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1651 | * break bindings | |
1652 | * | |
1653 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1654 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1655 | * include the -EINPROGRESS status for such sockets. | |
1656 | */ | |
1657 | ||
20f37034 HC |
1658 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1659 | int, addrlen) | |
1da177e4 LT |
1660 | { |
1661 | struct socket *sock; | |
230b1839 | 1662 | struct sockaddr_storage address; |
6cb153ca | 1663 | int err, fput_needed; |
1da177e4 | 1664 | |
6cb153ca | 1665 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1666 | if (!sock) |
1667 | goto out; | |
43db362d | 1668 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1669 | if (err < 0) |
1670 | goto out_put; | |
1671 | ||
89bddce5 | 1672 | err = |
230b1839 | 1673 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1674 | if (err) |
1675 | goto out_put; | |
1676 | ||
230b1839 | 1677 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1678 | sock->file->f_flags); |
1679 | out_put: | |
6cb153ca | 1680 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1681 | out: |
1682 | return err; | |
1683 | } | |
1684 | ||
1685 | /* | |
1686 | * Get the local address ('name') of a socket object. Move the obtained | |
1687 | * name to user space. | |
1688 | */ | |
1689 | ||
20f37034 HC |
1690 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1691 | int __user *, usockaddr_len) | |
1da177e4 LT |
1692 | { |
1693 | struct socket *sock; | |
230b1839 | 1694 | struct sockaddr_storage address; |
6cb153ca | 1695 | int len, err, fput_needed; |
89bddce5 | 1696 | |
6cb153ca | 1697 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1698 | if (!sock) |
1699 | goto out; | |
1700 | ||
1701 | err = security_socket_getsockname(sock); | |
1702 | if (err) | |
1703 | goto out_put; | |
1704 | ||
230b1839 | 1705 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1706 | if (err) |
1707 | goto out_put; | |
43db362d | 1708 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1709 | |
1710 | out_put: | |
6cb153ca | 1711 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1712 | out: |
1713 | return err; | |
1714 | } | |
1715 | ||
1716 | /* | |
1717 | * Get the remote address ('name') of a socket object. Move the obtained | |
1718 | * name to user space. | |
1719 | */ | |
1720 | ||
20f37034 HC |
1721 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1722 | int __user *, usockaddr_len) | |
1da177e4 LT |
1723 | { |
1724 | struct socket *sock; | |
230b1839 | 1725 | struct sockaddr_storage address; |
6cb153ca | 1726 | int len, err, fput_needed; |
1da177e4 | 1727 | |
89bddce5 SH |
1728 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1729 | if (sock != NULL) { | |
1da177e4 LT |
1730 | err = security_socket_getpeername(sock); |
1731 | if (err) { | |
6cb153ca | 1732 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1733 | return err; |
1734 | } | |
1735 | ||
89bddce5 | 1736 | err = |
230b1839 | 1737 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1738 | 1); |
1da177e4 | 1739 | if (!err) |
43db362d | 1740 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1741 | usockaddr_len); |
6cb153ca | 1742 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1743 | } |
1744 | return err; | |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | * Send a datagram to a given address. We move the address into kernel | |
1749 | * space and check the user space data area is readable before invoking | |
1750 | * the protocol. | |
1751 | */ | |
1752 | ||
3e0fa65f | 1753 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1754 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1755 | int, addr_len) |
1da177e4 LT |
1756 | { |
1757 | struct socket *sock; | |
230b1839 | 1758 | struct sockaddr_storage address; |
1da177e4 LT |
1759 | int err; |
1760 | struct msghdr msg; | |
1761 | struct iovec iov; | |
6cb153ca | 1762 | int fput_needed; |
6cb153ca | 1763 | |
253eacc0 LT |
1764 | if (len > INT_MAX) |
1765 | len = INT_MAX; | |
de0fa95c PE |
1766 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1767 | if (!sock) | |
4387ff75 | 1768 | goto out; |
6cb153ca | 1769 | |
89bddce5 SH |
1770 | iov.iov_base = buff; |
1771 | iov.iov_len = len; | |
1772 | msg.msg_name = NULL; | |
1773 | msg.msg_iov = &iov; | |
1774 | msg.msg_iovlen = 1; | |
1775 | msg.msg_control = NULL; | |
1776 | msg.msg_controllen = 0; | |
1777 | msg.msg_namelen = 0; | |
6cb153ca | 1778 | if (addr) { |
43db362d | 1779 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1780 | if (err < 0) |
1781 | goto out_put; | |
230b1839 | 1782 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1783 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1784 | } |
1785 | if (sock->file->f_flags & O_NONBLOCK) | |
1786 | flags |= MSG_DONTWAIT; | |
1787 | msg.msg_flags = flags; | |
1788 | err = sock_sendmsg(sock, &msg, len); | |
1789 | ||
89bddce5 | 1790 | out_put: |
de0fa95c | 1791 | fput_light(sock->file, fput_needed); |
4387ff75 | 1792 | out: |
1da177e4 LT |
1793 | return err; |
1794 | } | |
1795 | ||
1796 | /* | |
89bddce5 | 1797 | * Send a datagram down a socket. |
1da177e4 LT |
1798 | */ |
1799 | ||
3e0fa65f | 1800 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1801 | unsigned int, flags) |
1da177e4 LT |
1802 | { |
1803 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1804 | } | |
1805 | ||
1806 | /* | |
89bddce5 | 1807 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1808 | * sender. We verify the buffers are writable and if needed move the |
1809 | * sender address from kernel to user space. | |
1810 | */ | |
1811 | ||
3e0fa65f | 1812 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1813 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1814 | int __user *, addr_len) |
1da177e4 LT |
1815 | { |
1816 | struct socket *sock; | |
1817 | struct iovec iov; | |
1818 | struct msghdr msg; | |
230b1839 | 1819 | struct sockaddr_storage address; |
89bddce5 | 1820 | int err, err2; |
6cb153ca BL |
1821 | int fput_needed; |
1822 | ||
253eacc0 LT |
1823 | if (size > INT_MAX) |
1824 | size = INT_MAX; | |
de0fa95c | 1825 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1826 | if (!sock) |
de0fa95c | 1827 | goto out; |
1da177e4 | 1828 | |
89bddce5 SH |
1829 | msg.msg_control = NULL; |
1830 | msg.msg_controllen = 0; | |
1831 | msg.msg_iovlen = 1; | |
1832 | msg.msg_iov = &iov; | |
1833 | iov.iov_len = size; | |
1834 | iov.iov_base = ubuf; | |
230b1839 YH |
1835 | msg.msg_name = (struct sockaddr *)&address; |
1836 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1837 | if (sock->file->f_flags & O_NONBLOCK) |
1838 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1839 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1840 | |
89bddce5 | 1841 | if (err >= 0 && addr != NULL) { |
43db362d | 1842 | err2 = move_addr_to_user(&address, |
230b1839 | 1843 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1844 | if (err2 < 0) |
1845 | err = err2; | |
1da177e4 | 1846 | } |
de0fa95c PE |
1847 | |
1848 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1849 | out: |
1da177e4 LT |
1850 | return err; |
1851 | } | |
1852 | ||
1853 | /* | |
89bddce5 | 1854 | * Receive a datagram from a socket. |
1da177e4 LT |
1855 | */ |
1856 | ||
89bddce5 | 1857 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
95c96174 | 1858 | unsigned int flags) |
1da177e4 LT |
1859 | { |
1860 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1861 | } | |
1862 | ||
1863 | /* | |
1864 | * Set a socket option. Because we don't know the option lengths we have | |
1865 | * to pass the user mode parameter for the protocols to sort out. | |
1866 | */ | |
1867 | ||
20f37034 HC |
1868 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1869 | char __user *, optval, int, optlen) | |
1da177e4 | 1870 | { |
6cb153ca | 1871 | int err, fput_needed; |
1da177e4 LT |
1872 | struct socket *sock; |
1873 | ||
1874 | if (optlen < 0) | |
1875 | return -EINVAL; | |
89bddce5 SH |
1876 | |
1877 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1878 | if (sock != NULL) { | |
1879 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1880 | if (err) |
1881 | goto out_put; | |
1da177e4 LT |
1882 | |
1883 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1884 | err = |
1885 | sock_setsockopt(sock, level, optname, optval, | |
1886 | optlen); | |
1da177e4 | 1887 | else |
89bddce5 SH |
1888 | err = |
1889 | sock->ops->setsockopt(sock, level, optname, optval, | |
1890 | optlen); | |
6cb153ca BL |
1891 | out_put: |
1892 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1893 | } |
1894 | return err; | |
1895 | } | |
1896 | ||
1897 | /* | |
1898 | * Get a socket option. Because we don't know the option lengths we have | |
1899 | * to pass a user mode parameter for the protocols to sort out. | |
1900 | */ | |
1901 | ||
20f37034 HC |
1902 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1903 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1904 | { |
6cb153ca | 1905 | int err, fput_needed; |
1da177e4 LT |
1906 | struct socket *sock; |
1907 | ||
89bddce5 SH |
1908 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1909 | if (sock != NULL) { | |
6cb153ca BL |
1910 | err = security_socket_getsockopt(sock, level, optname); |
1911 | if (err) | |
1912 | goto out_put; | |
1da177e4 LT |
1913 | |
1914 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1915 | err = |
1916 | sock_getsockopt(sock, level, optname, optval, | |
1917 | optlen); | |
1da177e4 | 1918 | else |
89bddce5 SH |
1919 | err = |
1920 | sock->ops->getsockopt(sock, level, optname, optval, | |
1921 | optlen); | |
6cb153ca BL |
1922 | out_put: |
1923 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1924 | } |
1925 | return err; | |
1926 | } | |
1927 | ||
1da177e4 LT |
1928 | /* |
1929 | * Shutdown a socket. | |
1930 | */ | |
1931 | ||
754fe8d2 | 1932 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1933 | { |
6cb153ca | 1934 | int err, fput_needed; |
1da177e4 LT |
1935 | struct socket *sock; |
1936 | ||
89bddce5 SH |
1937 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1938 | if (sock != NULL) { | |
1da177e4 | 1939 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1940 | if (!err) |
1941 | err = sock->ops->shutdown(sock, how); | |
1942 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1943 | } |
1944 | return err; | |
1945 | } | |
1946 | ||
89bddce5 | 1947 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1948 | * fields which are the same type (int / unsigned) on our platforms. |
1949 | */ | |
1950 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1951 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1952 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1953 | ||
c71d8ebe TH |
1954 | struct used_address { |
1955 | struct sockaddr_storage name; | |
1956 | unsigned int name_len; | |
1957 | }; | |
1958 | ||
a7526eb5 | 1959 | static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 1960 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1961 | struct used_address *used_address) |
1da177e4 | 1962 | { |
89bddce5 SH |
1963 | struct compat_msghdr __user *msg_compat = |
1964 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1965 | struct sockaddr_storage address; |
1da177e4 | 1966 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1967 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1968 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1969 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 1970 | unsigned char *ctl_buf = ctl; |
a74e9106 | 1971 | int err, ctl_len, total_len; |
89bddce5 | 1972 | |
1da177e4 LT |
1973 | err = -EFAULT; |
1974 | if (MSG_CMSG_COMPAT & flags) { | |
228e548e | 1975 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1976 | return -EFAULT; |
228e548e | 1977 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
1da177e4 LT |
1978 | return -EFAULT; |
1979 | ||
228e548e | 1980 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
1981 | err = -EMSGSIZE; |
1982 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
1983 | goto out; | |
1984 | err = -ENOMEM; | |
1985 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
1986 | GFP_KERNEL); | |
1da177e4 | 1987 | if (!iov) |
228e548e | 1988 | goto out; |
1da177e4 LT |
1989 | } |
1990 | ||
1991 | /* This will also move the address data into kernel space */ | |
1992 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 1993 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 1994 | } else |
43db362d | 1995 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 1996 | if (err < 0) |
1da177e4 LT |
1997 | goto out_freeiov; |
1998 | total_len = err; | |
1999 | ||
2000 | err = -ENOBUFS; | |
2001 | ||
228e548e | 2002 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2003 | goto out_freeiov; |
228e548e | 2004 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2005 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2006 | err = |
228e548e | 2007 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2008 | sizeof(ctl)); |
1da177e4 LT |
2009 | if (err) |
2010 | goto out_freeiov; | |
228e548e AB |
2011 | ctl_buf = msg_sys->msg_control; |
2012 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2013 | } else if (ctl_len) { |
89bddce5 | 2014 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2015 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2016 | if (ctl_buf == NULL) |
1da177e4 LT |
2017 | goto out_freeiov; |
2018 | } | |
2019 | err = -EFAULT; | |
2020 | /* | |
228e548e | 2021 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2022 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2023 | * checking falls down on this. | |
2024 | */ | |
fb8621bb | 2025 | if (copy_from_user(ctl_buf, |
228e548e | 2026 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2027 | ctl_len)) |
1da177e4 | 2028 | goto out_freectl; |
228e548e | 2029 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2030 | } |
228e548e | 2031 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2032 | |
2033 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2034 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2035 | /* |
2036 | * If this is sendmmsg() and current destination address is same as | |
2037 | * previously succeeded address, omit asking LSM's decision. | |
2038 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2039 | * destination address never matches. | |
2040 | */ | |
bc909d9d MD |
2041 | if (used_address && msg_sys->msg_name && |
2042 | used_address->name_len == msg_sys->msg_namelen && | |
2043 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2044 | used_address->name_len)) { |
2045 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2046 | goto out_freectl; | |
2047 | } | |
2048 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2049 | /* | |
2050 | * If this is sendmmsg() and sending to current destination address was | |
2051 | * successful, remember it. | |
2052 | */ | |
2053 | if (used_address && err >= 0) { | |
2054 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2055 | if (msg_sys->msg_name) |
2056 | memcpy(&used_address->name, msg_sys->msg_name, | |
2057 | used_address->name_len); | |
c71d8ebe | 2058 | } |
1da177e4 LT |
2059 | |
2060 | out_freectl: | |
89bddce5 | 2061 | if (ctl_buf != ctl) |
1da177e4 LT |
2062 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2063 | out_freeiov: | |
2064 | if (iov != iovstack) | |
a74e9106 | 2065 | kfree(iov); |
228e548e AB |
2066 | out: |
2067 | return err; | |
2068 | } | |
2069 | ||
2070 | /* | |
2071 | * BSD sendmsg interface | |
2072 | */ | |
2073 | ||
a7526eb5 | 2074 | long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
228e548e AB |
2075 | { |
2076 | int fput_needed, err; | |
2077 | struct msghdr msg_sys; | |
1be374a0 AL |
2078 | struct socket *sock; |
2079 | ||
1be374a0 | 2080 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2081 | if (!sock) |
2082 | goto out; | |
2083 | ||
a7526eb5 | 2084 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2085 | |
6cb153ca | 2086 | fput_light(sock->file, fput_needed); |
89bddce5 | 2087 | out: |
1da177e4 LT |
2088 | return err; |
2089 | } | |
2090 | ||
a7526eb5 AL |
2091 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
2092 | { | |
2093 | if (flags & MSG_CMSG_COMPAT) | |
2094 | return -EINVAL; | |
2095 | return __sys_sendmsg(fd, msg, flags); | |
2096 | } | |
2097 | ||
228e548e AB |
2098 | /* |
2099 | * Linux sendmmsg interface | |
2100 | */ | |
2101 | ||
2102 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2103 | unsigned int flags) | |
2104 | { | |
2105 | int fput_needed, err, datagrams; | |
2106 | struct socket *sock; | |
2107 | struct mmsghdr __user *entry; | |
2108 | struct compat_mmsghdr __user *compat_entry; | |
2109 | struct msghdr msg_sys; | |
c71d8ebe | 2110 | struct used_address used_address; |
228e548e | 2111 | |
98382f41 AB |
2112 | if (vlen > UIO_MAXIOV) |
2113 | vlen = UIO_MAXIOV; | |
228e548e AB |
2114 | |
2115 | datagrams = 0; | |
2116 | ||
2117 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2118 | if (!sock) | |
2119 | return err; | |
2120 | ||
c71d8ebe | 2121 | used_address.name_len = UINT_MAX; |
228e548e AB |
2122 | entry = mmsg; |
2123 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2124 | err = 0; |
228e548e AB |
2125 | |
2126 | while (datagrams < vlen) { | |
228e548e | 2127 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2128 | err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
2129 | &msg_sys, flags, &used_address); | |
228e548e AB |
2130 | if (err < 0) |
2131 | break; | |
2132 | err = __put_user(err, &compat_entry->msg_len); | |
2133 | ++compat_entry; | |
2134 | } else { | |
a7526eb5 AL |
2135 | err = ___sys_sendmsg(sock, |
2136 | (struct msghdr __user *)entry, | |
2137 | &msg_sys, flags, &used_address); | |
228e548e AB |
2138 | if (err < 0) |
2139 | break; | |
2140 | err = put_user(err, &entry->msg_len); | |
2141 | ++entry; | |
2142 | } | |
2143 | ||
2144 | if (err) | |
2145 | break; | |
2146 | ++datagrams; | |
2147 | } | |
2148 | ||
228e548e AB |
2149 | fput_light(sock->file, fput_needed); |
2150 | ||
728ffb86 AB |
2151 | /* We only return an error if no datagrams were able to be sent */ |
2152 | if (datagrams != 0) | |
228e548e AB |
2153 | return datagrams; |
2154 | ||
228e548e AB |
2155 | return err; |
2156 | } | |
2157 | ||
2158 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2159 | unsigned int, vlen, unsigned int, flags) | |
2160 | { | |
1be374a0 AL |
2161 | if (flags & MSG_CMSG_COMPAT) |
2162 | return -EINVAL; | |
228e548e AB |
2163 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2164 | } | |
2165 | ||
a7526eb5 | 2166 | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2167 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2168 | { |
89bddce5 SH |
2169 | struct compat_msghdr __user *msg_compat = |
2170 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2171 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2172 | struct iovec *iov = iovstack; |
1da177e4 | 2173 | unsigned long cmsg_ptr; |
a74e9106 | 2174 | int err, total_len, len; |
1da177e4 LT |
2175 | |
2176 | /* kernel mode address */ | |
230b1839 | 2177 | struct sockaddr_storage addr; |
1da177e4 LT |
2178 | |
2179 | /* user mode address pointers */ | |
2180 | struct sockaddr __user *uaddr; | |
2181 | int __user *uaddr_len; | |
89bddce5 | 2182 | |
1da177e4 | 2183 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2184 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2185 | return -EFAULT; |
c6d409cf | 2186 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 2187 | return -EFAULT; |
1da177e4 | 2188 | |
a2e27255 | 2189 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2190 | err = -EMSGSIZE; |
2191 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2192 | goto out; | |
2193 | err = -ENOMEM; | |
2194 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2195 | GFP_KERNEL); | |
1da177e4 | 2196 | if (!iov) |
a2e27255 | 2197 | goto out; |
1da177e4 LT |
2198 | } |
2199 | ||
2200 | /* | |
89bddce5 SH |
2201 | * Save the user-mode address (verify_iovec will change the |
2202 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2203 | */ |
89bddce5 | 2204 | |
a2e27255 | 2205 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2206 | uaddr_len = COMPAT_NAMELEN(msg); |
2207 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2208 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 | 2209 | } else |
43db362d | 2210 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2211 | if (err < 0) |
2212 | goto out_freeiov; | |
89bddce5 | 2213 | total_len = err; |
1da177e4 | 2214 | |
a2e27255 ACM |
2215 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2216 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2217 | |
1da177e4 LT |
2218 | if (sock->file->f_flags & O_NONBLOCK) |
2219 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2220 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2221 | total_len, flags); | |
1da177e4 LT |
2222 | if (err < 0) |
2223 | goto out_freeiov; | |
2224 | len = err; | |
2225 | ||
2226 | if (uaddr != NULL) { | |
43db362d | 2227 | err = move_addr_to_user(&addr, |
a2e27255 | 2228 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2229 | uaddr_len); |
1da177e4 LT |
2230 | if (err < 0) |
2231 | goto out_freeiov; | |
2232 | } | |
a2e27255 | 2233 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2234 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2235 | if (err) |
2236 | goto out_freeiov; | |
2237 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2238 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2239 | &msg_compat->msg_controllen); |
2240 | else | |
a2e27255 | 2241 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2242 | &msg->msg_controllen); |
2243 | if (err) | |
2244 | goto out_freeiov; | |
2245 | err = len; | |
2246 | ||
2247 | out_freeiov: | |
2248 | if (iov != iovstack) | |
a74e9106 | 2249 | kfree(iov); |
a2e27255 ACM |
2250 | out: |
2251 | return err; | |
2252 | } | |
2253 | ||
2254 | /* | |
2255 | * BSD recvmsg interface | |
2256 | */ | |
2257 | ||
a7526eb5 | 2258 | long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2259 | { |
2260 | int fput_needed, err; | |
2261 | struct msghdr msg_sys; | |
1be374a0 AL |
2262 | struct socket *sock; |
2263 | ||
1be374a0 | 2264 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2265 | if (!sock) |
2266 | goto out; | |
2267 | ||
a7526eb5 | 2268 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2269 | |
6cb153ca | 2270 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2271 | out: |
2272 | return err; | |
2273 | } | |
2274 | ||
a7526eb5 AL |
2275 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
2276 | unsigned int, flags) | |
2277 | { | |
2278 | if (flags & MSG_CMSG_COMPAT) | |
2279 | return -EINVAL; | |
2280 | return __sys_recvmsg(fd, msg, flags); | |
2281 | } | |
2282 | ||
a2e27255 ACM |
2283 | /* |
2284 | * Linux recvmmsg interface | |
2285 | */ | |
2286 | ||
2287 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2288 | unsigned int flags, struct timespec *timeout) | |
2289 | { | |
2290 | int fput_needed, err, datagrams; | |
2291 | struct socket *sock; | |
2292 | struct mmsghdr __user *entry; | |
d7256d0e | 2293 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2294 | struct msghdr msg_sys; |
2295 | struct timespec end_time; | |
2296 | ||
2297 | if (timeout && | |
2298 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2299 | timeout->tv_nsec)) | |
2300 | return -EINVAL; | |
2301 | ||
2302 | datagrams = 0; | |
2303 | ||
2304 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2305 | if (!sock) | |
2306 | return err; | |
2307 | ||
2308 | err = sock_error(sock->sk); | |
2309 | if (err) | |
2310 | goto out_put; | |
2311 | ||
2312 | entry = mmsg; | |
d7256d0e | 2313 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2314 | |
2315 | while (datagrams < vlen) { | |
2316 | /* | |
2317 | * No need to ask LSM for more than the first datagram. | |
2318 | */ | |
d7256d0e | 2319 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2320 | err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
2321 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2322 | datagrams); | |
d7256d0e JMG |
2323 | if (err < 0) |
2324 | break; | |
2325 | err = __put_user(err, &compat_entry->msg_len); | |
2326 | ++compat_entry; | |
2327 | } else { | |
a7526eb5 AL |
2328 | err = ___sys_recvmsg(sock, |
2329 | (struct msghdr __user *)entry, | |
2330 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2331 | datagrams); | |
d7256d0e JMG |
2332 | if (err < 0) |
2333 | break; | |
2334 | err = put_user(err, &entry->msg_len); | |
2335 | ++entry; | |
2336 | } | |
2337 | ||
a2e27255 ACM |
2338 | if (err) |
2339 | break; | |
a2e27255 ACM |
2340 | ++datagrams; |
2341 | ||
71c5c159 BB |
2342 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2343 | if (flags & MSG_WAITFORONE) | |
2344 | flags |= MSG_DONTWAIT; | |
2345 | ||
a2e27255 ACM |
2346 | if (timeout) { |
2347 | ktime_get_ts(timeout); | |
2348 | *timeout = timespec_sub(end_time, *timeout); | |
2349 | if (timeout->tv_sec < 0) { | |
2350 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2351 | break; | |
2352 | } | |
2353 | ||
2354 | /* Timeout, return less than vlen datagrams */ | |
2355 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2356 | break; | |
2357 | } | |
2358 | ||
2359 | /* Out of band data, return right away */ | |
2360 | if (msg_sys.msg_flags & MSG_OOB) | |
2361 | break; | |
2362 | } | |
2363 | ||
2364 | out_put: | |
2365 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2366 | |
a2e27255 ACM |
2367 | if (err == 0) |
2368 | return datagrams; | |
2369 | ||
2370 | if (datagrams != 0) { | |
2371 | /* | |
2372 | * We may return less entries than requested (vlen) if the | |
2373 | * sock is non block and there aren't enough datagrams... | |
2374 | */ | |
2375 | if (err != -EAGAIN) { | |
2376 | /* | |
2377 | * ... or if recvmsg returns an error after we | |
2378 | * received some datagrams, where we record the | |
2379 | * error to return on the next call or if the | |
2380 | * app asks about it using getsockopt(SO_ERROR). | |
2381 | */ | |
2382 | sock->sk->sk_err = -err; | |
2383 | } | |
2384 | ||
2385 | return datagrams; | |
2386 | } | |
2387 | ||
2388 | return err; | |
2389 | } | |
2390 | ||
2391 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2392 | unsigned int, vlen, unsigned int, flags, | |
2393 | struct timespec __user *, timeout) | |
2394 | { | |
2395 | int datagrams; | |
2396 | struct timespec timeout_sys; | |
2397 | ||
1be374a0 AL |
2398 | if (flags & MSG_CMSG_COMPAT) |
2399 | return -EINVAL; | |
2400 | ||
a2e27255 ACM |
2401 | if (!timeout) |
2402 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2403 | ||
2404 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2405 | return -EFAULT; | |
2406 | ||
2407 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2408 | ||
2409 | if (datagrams > 0 && | |
2410 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2411 | datagrams = -EFAULT; | |
2412 | ||
2413 | return datagrams; | |
2414 | } | |
2415 | ||
2416 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2417 | /* Argument list sizes for sys_socketcall */ |
2418 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2419 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2420 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2421 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2422 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2423 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2424 | }; |
2425 | ||
1da177e4 LT |
2426 | #undef AL |
2427 | ||
2428 | /* | |
89bddce5 | 2429 | * System call vectors. |
1da177e4 LT |
2430 | * |
2431 | * Argument checking cleaned up. Saved 20% in size. | |
2432 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2433 | * it is set by the callees. |
1da177e4 LT |
2434 | */ |
2435 | ||
3e0fa65f | 2436 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2437 | { |
2950fa9d | 2438 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2439 | unsigned long a0, a1; |
1da177e4 | 2440 | int err; |
47379052 | 2441 | unsigned int len; |
1da177e4 | 2442 | |
228e548e | 2443 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2444 | return -EINVAL; |
2445 | ||
47379052 AV |
2446 | len = nargs[call]; |
2447 | if (len > sizeof(a)) | |
2448 | return -EINVAL; | |
2449 | ||
1da177e4 | 2450 | /* copy_from_user should be SMP safe. */ |
47379052 | 2451 | if (copy_from_user(a, args, len)) |
1da177e4 | 2452 | return -EFAULT; |
3ec3b2fb | 2453 | |
2950fa9d CG |
2454 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2455 | if (err) | |
2456 | return err; | |
3ec3b2fb | 2457 | |
89bddce5 SH |
2458 | a0 = a[0]; |
2459 | a1 = a[1]; | |
2460 | ||
2461 | switch (call) { | |
2462 | case SYS_SOCKET: | |
2463 | err = sys_socket(a0, a1, a[2]); | |
2464 | break; | |
2465 | case SYS_BIND: | |
2466 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2467 | break; | |
2468 | case SYS_CONNECT: | |
2469 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2470 | break; | |
2471 | case SYS_LISTEN: | |
2472 | err = sys_listen(a0, a1); | |
2473 | break; | |
2474 | case SYS_ACCEPT: | |
de11defe UD |
2475 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2476 | (int __user *)a[2], 0); | |
89bddce5 SH |
2477 | break; |
2478 | case SYS_GETSOCKNAME: | |
2479 | err = | |
2480 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2481 | (int __user *)a[2]); | |
2482 | break; | |
2483 | case SYS_GETPEERNAME: | |
2484 | err = | |
2485 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2486 | (int __user *)a[2]); | |
2487 | break; | |
2488 | case SYS_SOCKETPAIR: | |
2489 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2490 | break; | |
2491 | case SYS_SEND: | |
2492 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2493 | break; | |
2494 | case SYS_SENDTO: | |
2495 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2496 | (struct sockaddr __user *)a[4], a[5]); | |
2497 | break; | |
2498 | case SYS_RECV: | |
2499 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2500 | break; | |
2501 | case SYS_RECVFROM: | |
2502 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2503 | (struct sockaddr __user *)a[4], | |
2504 | (int __user *)a[5]); | |
2505 | break; | |
2506 | case SYS_SHUTDOWN: | |
2507 | err = sys_shutdown(a0, a1); | |
2508 | break; | |
2509 | case SYS_SETSOCKOPT: | |
2510 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2511 | break; | |
2512 | case SYS_GETSOCKOPT: | |
2513 | err = | |
2514 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2515 | (int __user *)a[4]); | |
2516 | break; | |
2517 | case SYS_SENDMSG: | |
2518 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2519 | break; | |
228e548e AB |
2520 | case SYS_SENDMMSG: |
2521 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2522 | break; | |
89bddce5 SH |
2523 | case SYS_RECVMSG: |
2524 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2525 | break; | |
a2e27255 ACM |
2526 | case SYS_RECVMMSG: |
2527 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2528 | (struct timespec __user *)a[4]); | |
2529 | break; | |
de11defe UD |
2530 | case SYS_ACCEPT4: |
2531 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2532 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2533 | break; |
89bddce5 SH |
2534 | default: |
2535 | err = -EINVAL; | |
2536 | break; | |
1da177e4 LT |
2537 | } |
2538 | return err; | |
2539 | } | |
2540 | ||
89bddce5 | 2541 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2542 | |
55737fda SH |
2543 | /** |
2544 | * sock_register - add a socket protocol handler | |
2545 | * @ops: description of protocol | |
2546 | * | |
1da177e4 LT |
2547 | * This function is called by a protocol handler that wants to |
2548 | * advertise its address family, and have it linked into the | |
55737fda SH |
2549 | * socket interface. The value ops->family coresponds to the |
2550 | * socket system call protocol family. | |
1da177e4 | 2551 | */ |
f0fd27d4 | 2552 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2553 | { |
2554 | int err; | |
2555 | ||
2556 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2557 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2558 | NPROTO); | |
1da177e4 LT |
2559 | return -ENOBUFS; |
2560 | } | |
55737fda SH |
2561 | |
2562 | spin_lock(&net_family_lock); | |
190683a9 ED |
2563 | if (rcu_dereference_protected(net_families[ops->family], |
2564 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2565 | err = -EEXIST; |
2566 | else { | |
cf778b00 | 2567 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2568 | err = 0; |
2569 | } | |
55737fda SH |
2570 | spin_unlock(&net_family_lock); |
2571 | ||
89bddce5 | 2572 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2573 | return err; |
2574 | } | |
c6d409cf | 2575 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2576 | |
55737fda SH |
2577 | /** |
2578 | * sock_unregister - remove a protocol handler | |
2579 | * @family: protocol family to remove | |
2580 | * | |
1da177e4 LT |
2581 | * This function is called by a protocol handler that wants to |
2582 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2583 | * new socket creation. |
2584 | * | |
2585 | * If protocol handler is a module, then it can use module reference | |
2586 | * counts to protect against new references. If protocol handler is not | |
2587 | * a module then it needs to provide its own protection in | |
2588 | * the ops->create routine. | |
1da177e4 | 2589 | */ |
f0fd27d4 | 2590 | void sock_unregister(int family) |
1da177e4 | 2591 | { |
f0fd27d4 | 2592 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2593 | |
55737fda | 2594 | spin_lock(&net_family_lock); |
a9b3cd7f | 2595 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2596 | spin_unlock(&net_family_lock); |
2597 | ||
2598 | synchronize_rcu(); | |
2599 | ||
89bddce5 | 2600 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2601 | } |
c6d409cf | 2602 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2603 | |
77d76ea3 | 2604 | static int __init sock_init(void) |
1da177e4 | 2605 | { |
b3e19d92 | 2606 | int err; |
2ca794e5 EB |
2607 | /* |
2608 | * Initialize the network sysctl infrastructure. | |
2609 | */ | |
2610 | err = net_sysctl_init(); | |
2611 | if (err) | |
2612 | goto out; | |
b3e19d92 | 2613 | |
1da177e4 | 2614 | /* |
89bddce5 | 2615 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2616 | */ |
2617 | skb_init(); | |
1da177e4 LT |
2618 | |
2619 | /* | |
89bddce5 | 2620 | * Initialize the protocols module. |
1da177e4 LT |
2621 | */ |
2622 | ||
2623 | init_inodecache(); | |
b3e19d92 NP |
2624 | |
2625 | err = register_filesystem(&sock_fs_type); | |
2626 | if (err) | |
2627 | goto out_fs; | |
1da177e4 | 2628 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2629 | if (IS_ERR(sock_mnt)) { |
2630 | err = PTR_ERR(sock_mnt); | |
2631 | goto out_mount; | |
2632 | } | |
77d76ea3 AK |
2633 | |
2634 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2635 | */ |
2636 | ||
2637 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2638 | err = netfilter_init(); |
2639 | if (err) | |
2640 | goto out; | |
1da177e4 | 2641 | #endif |
cbeb321a | 2642 | |
c1f19b51 RC |
2643 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2644 | skb_timestamping_init(); | |
2645 | #endif | |
2646 | ||
b3e19d92 NP |
2647 | out: |
2648 | return err; | |
2649 | ||
2650 | out_mount: | |
2651 | unregister_filesystem(&sock_fs_type); | |
2652 | out_fs: | |
2653 | goto out; | |
1da177e4 LT |
2654 | } |
2655 | ||
77d76ea3 AK |
2656 | core_initcall(sock_init); /* early initcall */ |
2657 | ||
1da177e4 LT |
2658 | #ifdef CONFIG_PROC_FS |
2659 | void socket_seq_show(struct seq_file *seq) | |
2660 | { | |
2661 | int cpu; | |
2662 | int counter = 0; | |
2663 | ||
6f912042 | 2664 | for_each_possible_cpu(cpu) |
89bddce5 | 2665 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2666 | |
2667 | /* It can be negative, by the way. 8) */ | |
2668 | if (counter < 0) | |
2669 | counter = 0; | |
2670 | ||
2671 | seq_printf(seq, "sockets: used %d\n", counter); | |
2672 | } | |
89bddce5 | 2673 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2674 | |
89bbfc95 | 2675 | #ifdef CONFIG_COMPAT |
6b96018b | 2676 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2677 | unsigned int cmd, void __user *up) |
7a229387 | 2678 | { |
7a229387 AB |
2679 | mm_segment_t old_fs = get_fs(); |
2680 | struct timeval ktv; | |
2681 | int err; | |
2682 | ||
2683 | set_fs(KERNEL_DS); | |
6b96018b | 2684 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2685 | set_fs(old_fs); |
644595f8 | 2686 | if (!err) |
ed6fe9d6 | 2687 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2688 | |
7a229387 AB |
2689 | return err; |
2690 | } | |
2691 | ||
6b96018b | 2692 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2693 | unsigned int cmd, void __user *up) |
7a229387 | 2694 | { |
7a229387 AB |
2695 | mm_segment_t old_fs = get_fs(); |
2696 | struct timespec kts; | |
2697 | int err; | |
2698 | ||
2699 | set_fs(KERNEL_DS); | |
6b96018b | 2700 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2701 | set_fs(old_fs); |
644595f8 | 2702 | if (!err) |
ed6fe9d6 | 2703 | err = compat_put_timespec(&kts, up); |
644595f8 | 2704 | |
7a229387 AB |
2705 | return err; |
2706 | } | |
2707 | ||
6b96018b | 2708 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2709 | { |
2710 | struct ifreq __user *uifr; | |
2711 | int err; | |
2712 | ||
2713 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2714 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2715 | return -EFAULT; |
2716 | ||
6b96018b | 2717 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2718 | if (err) |
2719 | return err; | |
2720 | ||
6b96018b | 2721 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2722 | return -EFAULT; |
2723 | ||
2724 | return 0; | |
2725 | } | |
2726 | ||
6b96018b | 2727 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2728 | { |
6b96018b | 2729 | struct compat_ifconf ifc32; |
7a229387 AB |
2730 | struct ifconf ifc; |
2731 | struct ifconf __user *uifc; | |
6b96018b | 2732 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2733 | struct ifreq __user *ifr; |
2734 | unsigned int i, j; | |
2735 | int err; | |
2736 | ||
6b96018b | 2737 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2738 | return -EFAULT; |
2739 | ||
43da5f2e | 2740 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2741 | if (ifc32.ifcbuf == 0) { |
2742 | ifc32.ifc_len = 0; | |
2743 | ifc.ifc_len = 0; | |
2744 | ifc.ifc_req = NULL; | |
2745 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2746 | } else { | |
c6d409cf ED |
2747 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2748 | sizeof(struct ifreq); | |
7a229387 AB |
2749 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2750 | ifc.ifc_len = len; | |
2751 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2752 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2753 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2754 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2755 | return -EFAULT; |
2756 | ifr++; | |
2757 | ifr32++; | |
2758 | } | |
2759 | } | |
2760 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2761 | return -EFAULT; | |
2762 | ||
6b96018b | 2763 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2764 | if (err) |
2765 | return err; | |
2766 | ||
2767 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2768 | return -EFAULT; | |
2769 | ||
2770 | ifr = ifc.ifc_req; | |
2771 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2772 | for (i = 0, j = 0; | |
c6d409cf ED |
2773 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2774 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2775 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2776 | return -EFAULT; |
2777 | ifr32++; | |
2778 | ifr++; | |
2779 | } | |
2780 | ||
2781 | if (ifc32.ifcbuf == 0) { | |
2782 | /* Translate from 64-bit structure multiple to | |
2783 | * a 32-bit one. | |
2784 | */ | |
2785 | i = ifc.ifc_len; | |
6b96018b | 2786 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2787 | ifc32.ifc_len = i; |
2788 | } else { | |
2789 | ifc32.ifc_len = i; | |
2790 | } | |
6b96018b | 2791 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2792 | return -EFAULT; |
2793 | ||
2794 | return 0; | |
2795 | } | |
2796 | ||
6b96018b | 2797 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2798 | { |
3a7da39d BH |
2799 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2800 | bool convert_in = false, convert_out = false; | |
2801 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2802 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2803 | struct ifreq __user *ifr; |
3a7da39d BH |
2804 | u32 rule_cnt = 0, actual_rule_cnt; |
2805 | u32 ethcmd; | |
7a229387 | 2806 | u32 data; |
3a7da39d | 2807 | int ret; |
7a229387 | 2808 | |
3a7da39d BH |
2809 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2810 | return -EFAULT; | |
7a229387 | 2811 | |
3a7da39d BH |
2812 | compat_rxnfc = compat_ptr(data); |
2813 | ||
2814 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2815 | return -EFAULT; |
2816 | ||
3a7da39d BH |
2817 | /* Most ethtool structures are defined without padding. |
2818 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2819 | */ | |
2820 | switch (ethcmd) { | |
2821 | default: | |
2822 | break; | |
2823 | case ETHTOOL_GRXCLSRLALL: | |
2824 | /* Buffer size is variable */ | |
2825 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2826 | return -EFAULT; | |
2827 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2828 | return -ENOMEM; | |
2829 | buf_size += rule_cnt * sizeof(u32); | |
2830 | /* fall through */ | |
2831 | case ETHTOOL_GRXRINGS: | |
2832 | case ETHTOOL_GRXCLSRLCNT: | |
2833 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2834 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2835 | convert_out = true; |
2836 | /* fall through */ | |
2837 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2838 | buf_size += sizeof(struct ethtool_rxnfc); |
2839 | convert_in = true; | |
2840 | break; | |
2841 | } | |
2842 | ||
2843 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2844 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2845 | |
2846 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2847 | return -EFAULT; |
2848 | ||
3a7da39d BH |
2849 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2850 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2851 | return -EFAULT; |
2852 | ||
3a7da39d | 2853 | if (convert_in) { |
127fe533 | 2854 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2855 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2856 | */ | |
127fe533 AD |
2857 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2858 | sizeof(compat_rxnfc->fs.m_ext) != | |
2859 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2860 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2861 | BUILD_BUG_ON( |
2862 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2863 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2864 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2865 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2866 | ||
2867 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2868 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2869 | (void __user *)rxnfc) || | |
3a7da39d BH |
2870 | copy_in_user(&rxnfc->fs.ring_cookie, |
2871 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2872 | (void __user *)(&rxnfc->fs.location + 1) - |
2873 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2874 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2875 | sizeof(rxnfc->rule_cnt))) | |
2876 | return -EFAULT; | |
2877 | } | |
2878 | ||
2879 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2880 | if (ret) | |
2881 | return ret; | |
2882 | ||
2883 | if (convert_out) { | |
2884 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2885 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2886 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2887 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2888 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2889 | (const void __user *)(&rxnfc->fs.location + 1) - |
2890 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2891 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2892 | sizeof(rxnfc->rule_cnt))) | |
2893 | return -EFAULT; | |
2894 | ||
2895 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2896 | /* As an optimisation, we only copy the actual | |
2897 | * number of rules that the underlying | |
2898 | * function returned. Since Mallory might | |
2899 | * change the rule count in user memory, we | |
2900 | * check that it is less than the rule count | |
2901 | * originally given (as the user buffer size), | |
2902 | * which has been range-checked. | |
2903 | */ | |
2904 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2905 | return -EFAULT; | |
2906 | if (actual_rule_cnt < rule_cnt) | |
2907 | rule_cnt = actual_rule_cnt; | |
2908 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2909 | &rxnfc->rule_locs[0], | |
2910 | rule_cnt * sizeof(u32))) | |
2911 | return -EFAULT; | |
2912 | } | |
2913 | } | |
2914 | ||
2915 | return 0; | |
7a229387 AB |
2916 | } |
2917 | ||
7a50a240 AB |
2918 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2919 | { | |
2920 | void __user *uptr; | |
2921 | compat_uptr_t uptr32; | |
2922 | struct ifreq __user *uifr; | |
2923 | ||
c6d409cf | 2924 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2925 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2926 | return -EFAULT; | |
2927 | ||
2928 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2929 | return -EFAULT; | |
2930 | ||
2931 | uptr = compat_ptr(uptr32); | |
2932 | ||
2933 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2934 | return -EFAULT; | |
2935 | ||
2936 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2937 | } | |
2938 | ||
6b96018b AB |
2939 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2940 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2941 | { |
2942 | struct ifreq kifr; | |
2943 | struct ifreq __user *uifr; | |
7a229387 AB |
2944 | mm_segment_t old_fs; |
2945 | int err; | |
2946 | u32 data; | |
2947 | void __user *datap; | |
2948 | ||
2949 | switch (cmd) { | |
2950 | case SIOCBONDENSLAVE: | |
2951 | case SIOCBONDRELEASE: | |
2952 | case SIOCBONDSETHWADDR: | |
2953 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2954 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2955 | return -EFAULT; |
2956 | ||
2957 | old_fs = get_fs(); | |
c6d409cf | 2958 | set_fs(KERNEL_DS); |
c3f52ae6 | 2959 | err = dev_ioctl(net, cmd, |
2960 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2961 | set_fs(old_fs); |
7a229387 AB |
2962 | |
2963 | return err; | |
2964 | case SIOCBONDSLAVEINFOQUERY: | |
2965 | case SIOCBONDINFOQUERY: | |
2966 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2967 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2968 | return -EFAULT; | |
2969 | ||
2970 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2971 | return -EFAULT; | |
2972 | ||
2973 | datap = compat_ptr(data); | |
2974 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2975 | return -EFAULT; | |
2976 | ||
6b96018b | 2977 | return dev_ioctl(net, cmd, uifr); |
7a229387 | 2978 | default: |
07d106d0 | 2979 | return -ENOIOCTLCMD; |
ccbd6a5a | 2980 | } |
7a229387 AB |
2981 | } |
2982 | ||
6b96018b AB |
2983 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2984 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2985 | { |
2986 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2987 | char tmp_buf[IFNAMSIZ]; |
2988 | void __user *data64; | |
2989 | u32 data32; | |
2990 | ||
2991 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2992 | IFNAMSIZ)) | |
2993 | return -EFAULT; | |
2994 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2995 | return -EFAULT; | |
2996 | data64 = compat_ptr(data32); | |
2997 | ||
2998 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2999 | ||
3000 | /* Don't check these user accesses, just let that get trapped | |
3001 | * in the ioctl handler instead. | |
3002 | */ | |
3003 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
3004 | IFNAMSIZ)) | |
3005 | return -EFAULT; | |
3006 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
3007 | return -EFAULT; | |
3008 | ||
6b96018b | 3009 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
3010 | } |
3011 | ||
6b96018b AB |
3012 | static int dev_ifsioc(struct net *net, struct socket *sock, |
3013 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 3014 | { |
a2116ed2 | 3015 | struct ifreq __user *uifr; |
7a229387 AB |
3016 | int err; |
3017 | ||
a2116ed2 AB |
3018 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
3019 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
3020 | return -EFAULT; | |
3021 | ||
3022 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
3023 | ||
7a229387 AB |
3024 | if (!err) { |
3025 | switch (cmd) { | |
3026 | case SIOCGIFFLAGS: | |
3027 | case SIOCGIFMETRIC: | |
3028 | case SIOCGIFMTU: | |
3029 | case SIOCGIFMEM: | |
3030 | case SIOCGIFHWADDR: | |
3031 | case SIOCGIFINDEX: | |
3032 | case SIOCGIFADDR: | |
3033 | case SIOCGIFBRDADDR: | |
3034 | case SIOCGIFDSTADDR: | |
3035 | case SIOCGIFNETMASK: | |
fab2532b | 3036 | case SIOCGIFPFLAGS: |
7a229387 | 3037 | case SIOCGIFTXQLEN: |
fab2532b AB |
3038 | case SIOCGMIIPHY: |
3039 | case SIOCGMIIREG: | |
a2116ed2 | 3040 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
3041 | err = -EFAULT; |
3042 | break; | |
3043 | } | |
3044 | } | |
3045 | return err; | |
3046 | } | |
3047 | ||
a2116ed2 AB |
3048 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3049 | struct compat_ifreq __user *uifr32) | |
3050 | { | |
3051 | struct ifreq ifr; | |
3052 | struct compat_ifmap __user *uifmap32; | |
3053 | mm_segment_t old_fs; | |
3054 | int err; | |
3055 | ||
3056 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3057 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3058 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3059 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3060 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3061 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3062 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3063 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
3064 | if (err) | |
3065 | return -EFAULT; | |
3066 | ||
3067 | old_fs = get_fs(); | |
c6d409cf | 3068 | set_fs(KERNEL_DS); |
c3f52ae6 | 3069 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3070 | set_fs(old_fs); |
a2116ed2 AB |
3071 | |
3072 | if (cmd == SIOCGIFMAP && !err) { | |
3073 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3074 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3075 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3076 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3077 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3078 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3079 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
3080 | if (err) | |
3081 | err = -EFAULT; | |
3082 | } | |
3083 | return err; | |
3084 | } | |
3085 | ||
3086 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
3087 | { | |
3088 | void __user *uptr; | |
3089 | compat_uptr_t uptr32; | |
3090 | struct ifreq __user *uifr; | |
3091 | ||
c6d409cf | 3092 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
a2116ed2 AB |
3093 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
3094 | return -EFAULT; | |
3095 | ||
3096 | if (get_user(uptr32, &uifr32->ifr_data)) | |
3097 | return -EFAULT; | |
3098 | ||
3099 | uptr = compat_ptr(uptr32); | |
3100 | ||
3101 | if (put_user(uptr, &uifr->ifr_data)) | |
3102 | return -EFAULT; | |
3103 | ||
3104 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
3105 | } | |
3106 | ||
7a229387 | 3107 | struct rtentry32 { |
c6d409cf | 3108 | u32 rt_pad1; |
7a229387 AB |
3109 | struct sockaddr rt_dst; /* target address */ |
3110 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3111 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3112 | unsigned short rt_flags; |
3113 | short rt_pad2; | |
3114 | u32 rt_pad3; | |
3115 | unsigned char rt_tos; | |
3116 | unsigned char rt_class; | |
3117 | short rt_pad4; | |
3118 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3119 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3120 | u32 rt_mtu; /* per route MTU/Window */ |
3121 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3122 | unsigned short rt_irtt; /* Initial RTT */ |
3123 | }; | |
3124 | ||
3125 | struct in6_rtmsg32 { | |
3126 | struct in6_addr rtmsg_dst; | |
3127 | struct in6_addr rtmsg_src; | |
3128 | struct in6_addr rtmsg_gateway; | |
3129 | u32 rtmsg_type; | |
3130 | u16 rtmsg_dst_len; | |
3131 | u16 rtmsg_src_len; | |
3132 | u32 rtmsg_metric; | |
3133 | u32 rtmsg_info; | |
3134 | u32 rtmsg_flags; | |
3135 | s32 rtmsg_ifindex; | |
3136 | }; | |
3137 | ||
6b96018b AB |
3138 | static int routing_ioctl(struct net *net, struct socket *sock, |
3139 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3140 | { |
3141 | int ret; | |
3142 | void *r = NULL; | |
3143 | struct in6_rtmsg r6; | |
3144 | struct rtentry r4; | |
3145 | char devname[16]; | |
3146 | u32 rtdev; | |
3147 | mm_segment_t old_fs = get_fs(); | |
3148 | ||
6b96018b AB |
3149 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3150 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3151 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3152 | 3 * sizeof(struct in6_addr)); |
c6d409cf ED |
3153 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3154 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3155 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3156 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3157 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3158 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3159 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3160 | |
3161 | r = (void *) &r6; | |
3162 | } else { /* ipv4 */ | |
6b96018b | 3163 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3164 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3165 | 3 * sizeof(struct sockaddr)); |
c6d409cf ED |
3166 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
3167 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3168 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3169 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
3170 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3171 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3172 | if (rtdev) { |
c6d409cf | 3173 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3174 | r4.rt_dev = (char __user __force *)devname; |
3175 | devname[15] = 0; | |
7a229387 AB |
3176 | } else |
3177 | r4.rt_dev = NULL; | |
3178 | ||
3179 | r = (void *) &r4; | |
3180 | } | |
3181 | ||
3182 | if (ret) { | |
3183 | ret = -EFAULT; | |
3184 | goto out; | |
3185 | } | |
3186 | ||
c6d409cf | 3187 | set_fs(KERNEL_DS); |
6b96018b | 3188 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3189 | set_fs(old_fs); |
7a229387 AB |
3190 | |
3191 | out: | |
7a229387 AB |
3192 | return ret; |
3193 | } | |
3194 | ||
3195 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3196 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3197 | * use compatible ioctls |
7a229387 | 3198 | */ |
6b96018b | 3199 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3200 | { |
6b96018b | 3201 | compat_ulong_t tmp; |
7a229387 | 3202 | |
6b96018b | 3203 | if (get_user(tmp, argp)) |
7a229387 AB |
3204 | return -EFAULT; |
3205 | if (tmp == BRCTL_GET_VERSION) | |
3206 | return BRCTL_VERSION + 1; | |
3207 | return -EINVAL; | |
3208 | } | |
3209 | ||
6b96018b AB |
3210 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3211 | unsigned int cmd, unsigned long arg) | |
3212 | { | |
3213 | void __user *argp = compat_ptr(arg); | |
3214 | struct sock *sk = sock->sk; | |
3215 | struct net *net = sock_net(sk); | |
7a229387 | 3216 | |
6b96018b AB |
3217 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
3218 | return siocdevprivate_ioctl(net, cmd, argp); | |
3219 | ||
3220 | switch (cmd) { | |
3221 | case SIOCSIFBR: | |
3222 | case SIOCGIFBR: | |
3223 | return old_bridge_ioctl(argp); | |
3224 | case SIOCGIFNAME: | |
3225 | return dev_ifname32(net, argp); | |
3226 | case SIOCGIFCONF: | |
3227 | return dev_ifconf(net, argp); | |
3228 | case SIOCETHTOOL: | |
3229 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3230 | case SIOCWANDEV: |
3231 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3232 | case SIOCGIFMAP: |
3233 | case SIOCSIFMAP: | |
3234 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3235 | case SIOCBONDENSLAVE: |
3236 | case SIOCBONDRELEASE: | |
3237 | case SIOCBONDSETHWADDR: | |
3238 | case SIOCBONDSLAVEINFOQUERY: | |
3239 | case SIOCBONDINFOQUERY: | |
3240 | case SIOCBONDCHANGEACTIVE: | |
3241 | return bond_ioctl(net, cmd, argp); | |
3242 | case SIOCADDRT: | |
3243 | case SIOCDELRT: | |
3244 | return routing_ioctl(net, sock, cmd, argp); | |
3245 | case SIOCGSTAMP: | |
3246 | return do_siocgstamp(net, sock, cmd, argp); | |
3247 | case SIOCGSTAMPNS: | |
3248 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
3249 | case SIOCSHWTSTAMP: |
3250 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
3251 | |
3252 | case FIOSETOWN: | |
3253 | case SIOCSPGRP: | |
3254 | case FIOGETOWN: | |
3255 | case SIOCGPGRP: | |
3256 | case SIOCBRADDBR: | |
3257 | case SIOCBRDELBR: | |
3258 | case SIOCGIFVLAN: | |
3259 | case SIOCSIFVLAN: | |
3260 | case SIOCADDDLCI: | |
3261 | case SIOCDELDLCI: | |
3262 | return sock_ioctl(file, cmd, arg); | |
3263 | ||
3264 | case SIOCGIFFLAGS: | |
3265 | case SIOCSIFFLAGS: | |
3266 | case SIOCGIFMETRIC: | |
3267 | case SIOCSIFMETRIC: | |
3268 | case SIOCGIFMTU: | |
3269 | case SIOCSIFMTU: | |
3270 | case SIOCGIFMEM: | |
3271 | case SIOCSIFMEM: | |
3272 | case SIOCGIFHWADDR: | |
3273 | case SIOCSIFHWADDR: | |
3274 | case SIOCADDMULTI: | |
3275 | case SIOCDELMULTI: | |
3276 | case SIOCGIFINDEX: | |
6b96018b AB |
3277 | case SIOCGIFADDR: |
3278 | case SIOCSIFADDR: | |
3279 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3280 | case SIOCDIFADDR: |
6b96018b AB |
3281 | case SIOCGIFBRDADDR: |
3282 | case SIOCSIFBRDADDR: | |
3283 | case SIOCGIFDSTADDR: | |
3284 | case SIOCSIFDSTADDR: | |
3285 | case SIOCGIFNETMASK: | |
3286 | case SIOCSIFNETMASK: | |
3287 | case SIOCSIFPFLAGS: | |
3288 | case SIOCGIFPFLAGS: | |
3289 | case SIOCGIFTXQLEN: | |
3290 | case SIOCSIFTXQLEN: | |
3291 | case SIOCBRADDIF: | |
3292 | case SIOCBRDELIF: | |
9177efd3 AB |
3293 | case SIOCSIFNAME: |
3294 | case SIOCGMIIPHY: | |
3295 | case SIOCGMIIREG: | |
3296 | case SIOCSMIIREG: | |
6b96018b | 3297 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3298 | |
6b96018b AB |
3299 | case SIOCSARP: |
3300 | case SIOCGARP: | |
3301 | case SIOCDARP: | |
6b96018b | 3302 | case SIOCATMARK: |
9177efd3 AB |
3303 | return sock_do_ioctl(net, sock, cmd, arg); |
3304 | } | |
3305 | ||
6b96018b AB |
3306 | return -ENOIOCTLCMD; |
3307 | } | |
7a229387 | 3308 | |
95c96174 | 3309 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3310 | unsigned long arg) |
89bbfc95 SP |
3311 | { |
3312 | struct socket *sock = file->private_data; | |
3313 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3314 | struct sock *sk; |
3315 | struct net *net; | |
3316 | ||
3317 | sk = sock->sk; | |
3318 | net = sock_net(sk); | |
89bbfc95 SP |
3319 | |
3320 | if (sock->ops->compat_ioctl) | |
3321 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3322 | ||
87de87d5 DM |
3323 | if (ret == -ENOIOCTLCMD && |
3324 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3325 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3326 | ||
6b96018b AB |
3327 | if (ret == -ENOIOCTLCMD) |
3328 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3329 | ||
89bbfc95 SP |
3330 | return ret; |
3331 | } | |
3332 | #endif | |
3333 | ||
ac5a488e SS |
3334 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3335 | { | |
3336 | return sock->ops->bind(sock, addr, addrlen); | |
3337 | } | |
c6d409cf | 3338 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3339 | |
3340 | int kernel_listen(struct socket *sock, int backlog) | |
3341 | { | |
3342 | return sock->ops->listen(sock, backlog); | |
3343 | } | |
c6d409cf | 3344 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3345 | |
3346 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3347 | { | |
3348 | struct sock *sk = sock->sk; | |
3349 | int err; | |
3350 | ||
3351 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3352 | newsock); | |
3353 | if (err < 0) | |
3354 | goto done; | |
3355 | ||
3356 | err = sock->ops->accept(sock, *newsock, flags); | |
3357 | if (err < 0) { | |
3358 | sock_release(*newsock); | |
fa8705b0 | 3359 | *newsock = NULL; |
ac5a488e SS |
3360 | goto done; |
3361 | } | |
3362 | ||
3363 | (*newsock)->ops = sock->ops; | |
1b08534e | 3364 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3365 | |
3366 | done: | |
3367 | return err; | |
3368 | } | |
c6d409cf | 3369 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3370 | |
3371 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3372 | int flags) |
ac5a488e SS |
3373 | { |
3374 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3375 | } | |
c6d409cf | 3376 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3377 | |
3378 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3379 | int *addrlen) | |
3380 | { | |
3381 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3382 | } | |
c6d409cf | 3383 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3384 | |
3385 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3386 | int *addrlen) | |
3387 | { | |
3388 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3389 | } | |
c6d409cf | 3390 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3391 | |
3392 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3393 | char *optval, int *optlen) | |
3394 | { | |
3395 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3396 | char __user *uoptval; |
3397 | int __user *uoptlen; | |
ac5a488e SS |
3398 | int err; |
3399 | ||
fb8621bb NK |
3400 | uoptval = (char __user __force *) optval; |
3401 | uoptlen = (int __user __force *) optlen; | |
3402 | ||
ac5a488e SS |
3403 | set_fs(KERNEL_DS); |
3404 | if (level == SOL_SOCKET) | |
fb8621bb | 3405 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3406 | else |
fb8621bb NK |
3407 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3408 | uoptlen); | |
ac5a488e SS |
3409 | set_fs(oldfs); |
3410 | return err; | |
3411 | } | |
c6d409cf | 3412 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3413 | |
3414 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3415 | char *optval, unsigned int optlen) |
ac5a488e SS |
3416 | { |
3417 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3418 | char __user *uoptval; |
ac5a488e SS |
3419 | int err; |
3420 | ||
fb8621bb NK |
3421 | uoptval = (char __user __force *) optval; |
3422 | ||
ac5a488e SS |
3423 | set_fs(KERNEL_DS); |
3424 | if (level == SOL_SOCKET) | |
fb8621bb | 3425 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3426 | else |
fb8621bb | 3427 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3428 | optlen); |
3429 | set_fs(oldfs); | |
3430 | return err; | |
3431 | } | |
c6d409cf | 3432 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3433 | |
3434 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3435 | size_t size, int flags) | |
3436 | { | |
3437 | if (sock->ops->sendpage) | |
3438 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3439 | ||
3440 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3441 | } | |
c6d409cf | 3442 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3443 | |
3444 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3445 | { | |
3446 | mm_segment_t oldfs = get_fs(); | |
3447 | int err; | |
3448 | ||
3449 | set_fs(KERNEL_DS); | |
3450 | err = sock->ops->ioctl(sock, cmd, arg); | |
3451 | set_fs(oldfs); | |
3452 | ||
3453 | return err; | |
3454 | } | |
c6d409cf | 3455 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3456 | |
91cf45f0 TM |
3457 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3458 | { | |
3459 | return sock->ops->shutdown(sock, how); | |
3460 | } | |
91cf45f0 | 3461 | EXPORT_SYMBOL(kernel_sock_shutdown); |