Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 LT |
72 | #include <linux/wanrouter.h> |
73 | #include <linux/if_bridge.h> | |
20380731 ACM |
74 | #include <linux/if_frad.h> |
75 | #include <linux/if_vlan.h> | |
1da177e4 LT |
76 | #include <linux/init.h> |
77 | #include <linux/poll.h> | |
78 | #include <linux/cache.h> | |
79 | #include <linux/module.h> | |
80 | #include <linux/highmem.h> | |
1da177e4 LT |
81 | #include <linux/mount.h> |
82 | #include <linux/security.h> | |
83 | #include <linux/syscalls.h> | |
84 | #include <linux/compat.h> | |
85 | #include <linux/kmod.h> | |
3ec3b2fb | 86 | #include <linux/audit.h> |
d86b5e0e | 87 | #include <linux/wireless.h> |
1b8d7ae4 | 88 | #include <linux/nsproxy.h> |
1fd7317d | 89 | #include <linux/magic.h> |
5a0e3ad6 | 90 | #include <linux/slab.h> |
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); |
f0fd27d4 | 159 | static const struct net_proto_family *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 | ||
230b1839 | 184 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *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 | |
11165f14 | 212 | static int move_addr_to_user(struct sockaddr *kaddr, int klen, |
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; | |
89bddce5 | 243 | |
e94b1766 | 244 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
245 | if (!ei) |
246 | return NULL; | |
43815482 ED |
247 | ei->socket.wq = kmalloc(sizeof(struct socket_wq), GFP_KERNEL); |
248 | if (!ei->socket.wq) { | |
249 | kmem_cache_free(sock_inode_cachep, ei); | |
250 | return NULL; | |
251 | } | |
252 | init_waitqueue_head(&ei->socket.wq->wait); | |
253 | ei->socket.wq->fasync_list = NULL; | |
89bddce5 | 254 | |
1da177e4 LT |
255 | ei->socket.state = SS_UNCONNECTED; |
256 | ei->socket.flags = 0; | |
257 | ei->socket.ops = NULL; | |
258 | ei->socket.sk = NULL; | |
259 | ei->socket.file = NULL; | |
1da177e4 LT |
260 | |
261 | return &ei->vfs_inode; | |
262 | } | |
263 | ||
43815482 ED |
264 | |
265 | static void wq_free_rcu(struct rcu_head *head) | |
266 | { | |
267 | struct socket_wq *wq = container_of(head, struct socket_wq, rcu); | |
268 | ||
269 | kfree(wq); | |
270 | } | |
271 | ||
1da177e4 LT |
272 | static void sock_destroy_inode(struct inode *inode) |
273 | { | |
43815482 ED |
274 | struct socket_alloc *ei; |
275 | ||
276 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
277 | call_rcu(&ei->socket.wq->rcu, wq_free_rcu); | |
278 | kmem_cache_free(sock_inode_cachep, ei); | |
1da177e4 LT |
279 | } |
280 | ||
51cc5068 | 281 | static void init_once(void *foo) |
1da177e4 | 282 | { |
89bddce5 | 283 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 284 | |
a35afb83 | 285 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 286 | } |
89bddce5 | 287 | |
1da177e4 LT |
288 | static int init_inodecache(void) |
289 | { | |
290 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
291 | sizeof(struct socket_alloc), |
292 | 0, | |
293 | (SLAB_HWCACHE_ALIGN | | |
294 | SLAB_RECLAIM_ACCOUNT | | |
295 | SLAB_MEM_SPREAD), | |
20c2df83 | 296 | init_once); |
1da177e4 LT |
297 | if (sock_inode_cachep == NULL) |
298 | return -ENOMEM; | |
299 | return 0; | |
300 | } | |
301 | ||
b87221de | 302 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
303 | .alloc_inode = sock_alloc_inode, |
304 | .destroy_inode = sock_destroy_inode, | |
305 | .statfs = simple_statfs, | |
1da177e4 LT |
306 | }; |
307 | ||
51139ada AV |
308 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
309 | int flags, const char *dev_name, void *data) | |
1da177e4 | 310 | { |
51139ada | 311 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC); |
1da177e4 LT |
312 | } |
313 | ||
ba89966c | 314 | static struct vfsmount *sock_mnt __read_mostly; |
1da177e4 LT |
315 | |
316 | static struct file_system_type sock_fs_type = { | |
317 | .name = "sockfs", | |
51139ada | 318 | .mount = sockfs_mount, |
1da177e4 LT |
319 | .kill_sb = kill_anon_super, |
320 | }; | |
89bddce5 | 321 | |
c23fbb6b ED |
322 | /* |
323 | * sockfs_dname() is called from d_path(). | |
324 | */ | |
325 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
326 | { | |
327 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
328 | dentry->d_inode->i_ino); | |
329 | } | |
330 | ||
3ba13d17 | 331 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 332 | .d_dname = sockfs_dname, |
1da177e4 LT |
333 | }; |
334 | ||
335 | /* | |
336 | * Obtains the first available file descriptor and sets it up for use. | |
337 | * | |
39d8c1b6 DM |
338 | * These functions create file structures and maps them to fd space |
339 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
340 | * and file struct implicitly stored in sock->file. |
341 | * Note that another thread may close file descriptor before we return | |
342 | * from this function. We use the fact that now we do not refer | |
343 | * to socket after mapping. If one day we will need it, this | |
344 | * function will increment ref. count on file by 1. | |
345 | * | |
346 | * In any case returned fd MAY BE not valid! | |
347 | * This race condition is unavoidable | |
348 | * with shared fd spaces, we cannot solve it inside kernel, | |
349 | * but we take care of internal coherence yet. | |
350 | */ | |
351 | ||
7cbe66b6 | 352 | static int sock_alloc_file(struct socket *sock, struct file **f, int flags) |
1da177e4 | 353 | { |
7cbe66b6 | 354 | struct qstr name = { .name = "" }; |
2c48b9c4 | 355 | struct path path; |
7cbe66b6 | 356 | struct file *file; |
1da177e4 | 357 | int fd; |
1da177e4 | 358 | |
a677a039 | 359 | fd = get_unused_fd_flags(flags); |
7cbe66b6 AV |
360 | if (unlikely(fd < 0)) |
361 | return fd; | |
1da177e4 | 362 | |
2c48b9c4 AV |
363 | path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); |
364 | if (unlikely(!path.dentry)) { | |
7cbe66b6 | 365 | put_unused_fd(fd); |
39d8c1b6 | 366 | return -ENOMEM; |
7cbe66b6 | 367 | } |
2c48b9c4 | 368 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 369 | |
2c48b9c4 | 370 | path.dentry->d_op = &sockfs_dentry_operations; |
2c48b9c4 | 371 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 372 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 373 | |
2c48b9c4 | 374 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 375 | &socket_file_ops); |
cc3808f8 AV |
376 | if (unlikely(!file)) { |
377 | /* drop dentry, keep inode */ | |
7de9c6ee | 378 | ihold(path.dentry->d_inode); |
2c48b9c4 | 379 | path_put(&path); |
cc3808f8 AV |
380 | put_unused_fd(fd); |
381 | return -ENFILE; | |
382 | } | |
383 | ||
384 | sock->file = file; | |
77d27200 | 385 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
386 | file->f_pos = 0; |
387 | file->private_data = sock; | |
1da177e4 | 388 | |
7cbe66b6 AV |
389 | *f = file; |
390 | return fd; | |
39d8c1b6 DM |
391 | } |
392 | ||
a677a039 | 393 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
394 | { |
395 | struct file *newfile; | |
7cbe66b6 | 396 | int fd = sock_alloc_file(sock, &newfile, flags); |
39d8c1b6 | 397 | |
7cbe66b6 | 398 | if (likely(fd >= 0)) |
39d8c1b6 | 399 | fd_install(fd, newfile); |
7cbe66b6 | 400 | |
1da177e4 LT |
401 | return fd; |
402 | } | |
c6d409cf | 403 | EXPORT_SYMBOL(sock_map_fd); |
1da177e4 | 404 | |
6cb153ca BL |
405 | static struct socket *sock_from_file(struct file *file, int *err) |
406 | { | |
6cb153ca BL |
407 | if (file->f_op == &socket_file_ops) |
408 | return file->private_data; /* set in sock_map_fd */ | |
409 | ||
23bb80d2 ED |
410 | *err = -ENOTSOCK; |
411 | return NULL; | |
6cb153ca BL |
412 | } |
413 | ||
1da177e4 | 414 | /** |
c6d409cf | 415 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
416 | * @fd: file handle |
417 | * @err: pointer to an error code return | |
418 | * | |
419 | * The file handle passed in is locked and the socket it is bound | |
420 | * too is returned. If an error occurs the err pointer is overwritten | |
421 | * with a negative errno code and NULL is returned. The function checks | |
422 | * for both invalid handles and passing a handle which is not a socket. | |
423 | * | |
424 | * On a success the socket object pointer is returned. | |
425 | */ | |
426 | ||
427 | struct socket *sockfd_lookup(int fd, int *err) | |
428 | { | |
429 | struct file *file; | |
1da177e4 LT |
430 | struct socket *sock; |
431 | ||
89bddce5 SH |
432 | file = fget(fd); |
433 | if (!file) { | |
1da177e4 LT |
434 | *err = -EBADF; |
435 | return NULL; | |
436 | } | |
89bddce5 | 437 | |
6cb153ca BL |
438 | sock = sock_from_file(file, err); |
439 | if (!sock) | |
1da177e4 | 440 | fput(file); |
6cb153ca BL |
441 | return sock; |
442 | } | |
c6d409cf | 443 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 444 | |
6cb153ca BL |
445 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
446 | { | |
447 | struct file *file; | |
448 | struct socket *sock; | |
449 | ||
3672558c | 450 | *err = -EBADF; |
6cb153ca BL |
451 | file = fget_light(fd, fput_needed); |
452 | if (file) { | |
453 | sock = sock_from_file(file, err); | |
454 | if (sock) | |
455 | return sock; | |
456 | fput_light(file, *fput_needed); | |
1da177e4 | 457 | } |
6cb153ca | 458 | return NULL; |
1da177e4 LT |
459 | } |
460 | ||
461 | /** | |
462 | * sock_alloc - allocate a socket | |
89bddce5 | 463 | * |
1da177e4 LT |
464 | * Allocate a new inode and socket object. The two are bound together |
465 | * and initialised. The socket is then returned. If we are out of inodes | |
466 | * NULL is returned. | |
467 | */ | |
468 | ||
469 | static struct socket *sock_alloc(void) | |
470 | { | |
89bddce5 SH |
471 | struct inode *inode; |
472 | struct socket *sock; | |
1da177e4 LT |
473 | |
474 | inode = new_inode(sock_mnt->mnt_sb); | |
475 | if (!inode) | |
476 | return NULL; | |
477 | ||
478 | sock = SOCKET_I(inode); | |
479 | ||
29a020d3 | 480 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 481 | inode->i_ino = get_next_ino(); |
89bddce5 | 482 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
483 | inode->i_uid = current_fsuid(); |
484 | inode->i_gid = current_fsgid(); | |
1da177e4 | 485 | |
4e69489a | 486 | percpu_add(sockets_in_use, 1); |
1da177e4 LT |
487 | return sock; |
488 | } | |
489 | ||
490 | /* | |
491 | * In theory you can't get an open on this inode, but /proc provides | |
492 | * a back door. Remember to keep it shut otherwise you'll let the | |
493 | * creepy crawlies in. | |
494 | */ | |
89bddce5 | 495 | |
1da177e4 LT |
496 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
497 | { | |
498 | return -ENXIO; | |
499 | } | |
500 | ||
4b6f5d20 | 501 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
502 | .owner = THIS_MODULE, |
503 | .open = sock_no_open, | |
6038f373 | 504 | .llseek = noop_llseek, |
1da177e4 LT |
505 | }; |
506 | ||
507 | /** | |
508 | * sock_release - close a socket | |
509 | * @sock: socket to close | |
510 | * | |
511 | * The socket is released from the protocol stack if it has a release | |
512 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 513 | * an inode not a file. |
1da177e4 | 514 | */ |
89bddce5 | 515 | |
1da177e4 LT |
516 | void sock_release(struct socket *sock) |
517 | { | |
518 | if (sock->ops) { | |
519 | struct module *owner = sock->ops->owner; | |
520 | ||
521 | sock->ops->release(sock); | |
522 | sock->ops = NULL; | |
523 | module_put(owner); | |
524 | } | |
525 | ||
43815482 | 526 | if (sock->wq->fasync_list) |
1da177e4 LT |
527 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
528 | ||
4e69489a | 529 | percpu_sub(sockets_in_use, 1); |
1da177e4 LT |
530 | if (!sock->file) { |
531 | iput(SOCK_INODE(sock)); | |
532 | return; | |
533 | } | |
89bddce5 | 534 | sock->file = NULL; |
1da177e4 | 535 | } |
c6d409cf | 536 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 537 | |
2244d07b | 538 | int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 539 | { |
2244d07b | 540 | *tx_flags = 0; |
20d49473 | 541 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 542 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 543 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 544 | *tx_flags |= SKBTX_SW_TSTAMP; |
20d49473 PO |
545 | return 0; |
546 | } | |
547 | EXPORT_SYMBOL(sock_tx_timestamp); | |
548 | ||
89bddce5 | 549 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
550 | struct msghdr *msg, size_t size) |
551 | { | |
552 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
553 | int err; | |
554 | ||
f8451725 HX |
555 | sock_update_classid(sock->sk); |
556 | ||
1da177e4 LT |
557 | si->sock = sock; |
558 | si->scm = NULL; | |
559 | si->msg = msg; | |
560 | si->size = size; | |
561 | ||
562 | err = security_socket_sendmsg(sock, msg, size); | |
563 | if (err) | |
564 | return err; | |
565 | ||
566 | return sock->ops->sendmsg(iocb, sock, msg, size); | |
567 | } | |
568 | ||
569 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
570 | { | |
571 | struct kiocb iocb; | |
572 | struct sock_iocb siocb; | |
573 | int ret; | |
574 | ||
575 | init_sync_kiocb(&iocb, NULL); | |
576 | iocb.private = &siocb; | |
577 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
578 | if (-EIOCBQUEUED == ret) | |
579 | ret = wait_on_sync_kiocb(&iocb); | |
580 | return ret; | |
581 | } | |
c6d409cf | 582 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 LT |
583 | |
584 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
585 | struct kvec *vec, size_t num, size_t size) | |
586 | { | |
587 | mm_segment_t oldfs = get_fs(); | |
588 | int result; | |
589 | ||
590 | set_fs(KERNEL_DS); | |
591 | /* | |
592 | * the following is safe, since for compiler definitions of kvec and | |
593 | * iovec are identical, yielding the same in-core layout and alignment | |
594 | */ | |
89bddce5 | 595 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
596 | msg->msg_iovlen = num; |
597 | result = sock_sendmsg(sock, msg, size); | |
598 | set_fs(oldfs); | |
599 | return result; | |
600 | } | |
c6d409cf | 601 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 602 | |
20d49473 PO |
603 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
604 | { | |
605 | if (kt.tv64) { | |
606 | *ts = ktime_to_timespec(kt); | |
607 | return 1; | |
608 | } else { | |
609 | return 0; | |
610 | } | |
611 | } | |
612 | ||
92f37fd2 ED |
613 | /* |
614 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
615 | */ | |
616 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
617 | struct sk_buff *skb) | |
618 | { | |
20d49473 PO |
619 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
620 | struct timespec ts[3]; | |
621 | int empty = 1; | |
622 | struct skb_shared_hwtstamps *shhwtstamps = | |
623 | skb_hwtstamps(skb); | |
624 | ||
625 | /* Race occurred between timestamp enabling and packet | |
626 | receiving. Fill in the current time for now. */ | |
627 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
628 | __net_timestamp(skb); | |
629 | ||
630 | if (need_software_tstamp) { | |
631 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
632 | struct timeval tv; | |
633 | skb_get_timestamp(skb, &tv); | |
634 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
635 | sizeof(tv), &tv); | |
636 | } else { | |
842509b8 | 637 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 638 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 639 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
640 | } |
641 | } | |
642 | ||
643 | ||
644 | memset(ts, 0, sizeof(ts)); | |
645 | if (skb->tstamp.tv64 && | |
646 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
647 | skb_get_timestampns(skb, ts + 0); | |
648 | empty = 0; | |
649 | } | |
650 | if (shhwtstamps) { | |
651 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
652 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
653 | empty = 0; | |
654 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
655 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
656 | empty = 0; | |
92f37fd2 | 657 | } |
20d49473 PO |
658 | if (!empty) |
659 | put_cmsg(msg, SOL_SOCKET, | |
660 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 661 | } |
7c81fd8b ACM |
662 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
663 | ||
11165f14 | 664 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
665 | struct sk_buff *skb) | |
3b885787 NH |
666 | { |
667 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
668 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
669 | sizeof(__u32), &skb->dropcount); | |
670 | } | |
671 | ||
767dd033 | 672 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
673 | struct sk_buff *skb) |
674 | { | |
675 | sock_recv_timestamp(msg, sk, skb); | |
676 | sock_recv_drops(msg, sk, skb); | |
677 | } | |
767dd033 | 678 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 679 | |
a2e27255 ACM |
680 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
681 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 682 | { |
1da177e4 LT |
683 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
684 | ||
f8451725 HX |
685 | sock_update_classid(sock->sk); |
686 | ||
1da177e4 LT |
687 | si->sock = sock; |
688 | si->scm = NULL; | |
689 | si->msg = msg; | |
690 | si->size = size; | |
691 | si->flags = flags; | |
692 | ||
1da177e4 LT |
693 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
694 | } | |
695 | ||
a2e27255 ACM |
696 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
697 | struct msghdr *msg, size_t size, int flags) | |
698 | { | |
699 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
700 | ||
701 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
702 | } | |
703 | ||
89bddce5 | 704 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
705 | size_t size, int flags) |
706 | { | |
707 | struct kiocb iocb; | |
708 | struct sock_iocb siocb; | |
709 | int ret; | |
710 | ||
89bddce5 | 711 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
712 | iocb.private = &siocb; |
713 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
714 | if (-EIOCBQUEUED == ret) | |
715 | ret = wait_on_sync_kiocb(&iocb); | |
716 | return ret; | |
717 | } | |
c6d409cf | 718 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 719 | |
a2e27255 ACM |
720 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
721 | size_t size, int flags) | |
722 | { | |
723 | struct kiocb iocb; | |
724 | struct sock_iocb siocb; | |
725 | int ret; | |
726 | ||
727 | init_sync_kiocb(&iocb, NULL); | |
728 | iocb.private = &siocb; | |
729 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
730 | if (-EIOCBQUEUED == ret) | |
731 | ret = wait_on_sync_kiocb(&iocb); | |
732 | return ret; | |
733 | } | |
734 | ||
c1249c0a ML |
735 | /** |
736 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
737 | * @sock: The socket to receive the message from | |
738 | * @msg: Received message | |
739 | * @vec: Input s/g array for message data | |
740 | * @num: Size of input s/g array | |
741 | * @size: Number of bytes to read | |
742 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
743 | * | |
744 | * On return the msg structure contains the scatter/gather array passed in the | |
745 | * vec argument. The array is modified so that it consists of the unfilled | |
746 | * portion of the original array. | |
747 | * | |
748 | * The returned value is the total number of bytes received, or an error. | |
749 | */ | |
89bddce5 SH |
750 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
751 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
752 | { |
753 | mm_segment_t oldfs = get_fs(); | |
754 | int result; | |
755 | ||
756 | set_fs(KERNEL_DS); | |
757 | /* | |
758 | * the following is safe, since for compiler definitions of kvec and | |
759 | * iovec are identical, yielding the same in-core layout and alignment | |
760 | */ | |
89bddce5 | 761 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
762 | result = sock_recvmsg(sock, msg, size, flags); |
763 | set_fs(oldfs); | |
764 | return result; | |
765 | } | |
c6d409cf | 766 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 LT |
767 | |
768 | static void sock_aio_dtor(struct kiocb *iocb) | |
769 | { | |
770 | kfree(iocb->private); | |
771 | } | |
772 | ||
ce1d4d3e CH |
773 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
774 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 775 | { |
1da177e4 LT |
776 | struct socket *sock; |
777 | int flags; | |
778 | ||
ce1d4d3e CH |
779 | sock = file->private_data; |
780 | ||
781 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; | |
782 | if (more) | |
783 | flags |= MSG_MORE; | |
784 | ||
e6949583 | 785 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 786 | } |
1da177e4 | 787 | |
9c55e01c | 788 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 789 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
790 | unsigned int flags) |
791 | { | |
792 | struct socket *sock = file->private_data; | |
793 | ||
997b37da RDC |
794 | if (unlikely(!sock->ops->splice_read)) |
795 | return -EINVAL; | |
796 | ||
f8451725 HX |
797 | sock_update_classid(sock->sk); |
798 | ||
9c55e01c JA |
799 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
800 | } | |
801 | ||
ce1d4d3e | 802 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 803 | struct sock_iocb *siocb) |
ce1d4d3e CH |
804 | { |
805 | if (!is_sync_kiocb(iocb)) { | |
806 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
807 | if (!siocb) | |
808 | return NULL; | |
1da177e4 LT |
809 | iocb->ki_dtor = sock_aio_dtor; |
810 | } | |
1da177e4 | 811 | |
ce1d4d3e | 812 | siocb->kiocb = iocb; |
ce1d4d3e CH |
813 | iocb->private = siocb; |
814 | return siocb; | |
1da177e4 LT |
815 | } |
816 | ||
ce1d4d3e | 817 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
818 | struct file *file, const struct iovec *iov, |
819 | unsigned long nr_segs) | |
ce1d4d3e CH |
820 | { |
821 | struct socket *sock = file->private_data; | |
822 | size_t size = 0; | |
823 | int i; | |
1da177e4 | 824 | |
89bddce5 SH |
825 | for (i = 0; i < nr_segs; i++) |
826 | size += iov[i].iov_len; | |
1da177e4 | 827 | |
ce1d4d3e CH |
828 | msg->msg_name = NULL; |
829 | msg->msg_namelen = 0; | |
830 | msg->msg_control = NULL; | |
831 | msg->msg_controllen = 0; | |
89bddce5 | 832 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
833 | msg->msg_iovlen = nr_segs; |
834 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
835 | ||
836 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
837 | } | |
838 | ||
027445c3 BP |
839 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
840 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
841 | { |
842 | struct sock_iocb siocb, *x; | |
843 | ||
1da177e4 LT |
844 | if (pos != 0) |
845 | return -ESPIPE; | |
027445c3 BP |
846 | |
847 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
848 | return 0; |
849 | ||
027445c3 BP |
850 | |
851 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
852 | if (!x) |
853 | return -ENOMEM; | |
027445c3 | 854 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
855 | } |
856 | ||
ce1d4d3e | 857 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
858 | struct file *file, const struct iovec *iov, |
859 | unsigned long nr_segs) | |
1da177e4 | 860 | { |
ce1d4d3e CH |
861 | struct socket *sock = file->private_data; |
862 | size_t size = 0; | |
863 | int i; | |
1da177e4 | 864 | |
89bddce5 SH |
865 | for (i = 0; i < nr_segs; i++) |
866 | size += iov[i].iov_len; | |
1da177e4 | 867 | |
ce1d4d3e CH |
868 | msg->msg_name = NULL; |
869 | msg->msg_namelen = 0; | |
870 | msg->msg_control = NULL; | |
871 | msg->msg_controllen = 0; | |
89bddce5 | 872 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
873 | msg->msg_iovlen = nr_segs; |
874 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
875 | if (sock->type == SOCK_SEQPACKET) | |
876 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 877 | |
ce1d4d3e | 878 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
879 | } |
880 | ||
027445c3 BP |
881 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
882 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
883 | { |
884 | struct sock_iocb siocb, *x; | |
1da177e4 | 885 | |
ce1d4d3e CH |
886 | if (pos != 0) |
887 | return -ESPIPE; | |
027445c3 | 888 | |
027445c3 | 889 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
890 | if (!x) |
891 | return -ENOMEM; | |
1da177e4 | 892 | |
027445c3 | 893 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
894 | } |
895 | ||
1da177e4 LT |
896 | /* |
897 | * Atomic setting of ioctl hooks to avoid race | |
898 | * with module unload. | |
899 | */ | |
900 | ||
4a3e2f71 | 901 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 902 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 903 | |
881d966b | 904 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 905 | { |
4a3e2f71 | 906 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 907 | br_ioctl_hook = hook; |
4a3e2f71 | 908 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
909 | } |
910 | EXPORT_SYMBOL(brioctl_set); | |
911 | ||
4a3e2f71 | 912 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 913 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 914 | |
881d966b | 915 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 916 | { |
4a3e2f71 | 917 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 918 | vlan_ioctl_hook = hook; |
4a3e2f71 | 919 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
920 | } |
921 | EXPORT_SYMBOL(vlan_ioctl_set); | |
922 | ||
4a3e2f71 | 923 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 924 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 925 | |
89bddce5 | 926 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 927 | { |
4a3e2f71 | 928 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 929 | dlci_ioctl_hook = hook; |
4a3e2f71 | 930 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
931 | } |
932 | EXPORT_SYMBOL(dlci_ioctl_set); | |
933 | ||
6b96018b AB |
934 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
935 | unsigned int cmd, unsigned long arg) | |
936 | { | |
937 | int err; | |
938 | void __user *argp = (void __user *)arg; | |
939 | ||
940 | err = sock->ops->ioctl(sock, cmd, arg); | |
941 | ||
942 | /* | |
943 | * If this ioctl is unknown try to hand it down | |
944 | * to the NIC driver. | |
945 | */ | |
946 | if (err == -ENOIOCTLCMD) | |
947 | err = dev_ioctl(net, cmd, argp); | |
948 | ||
949 | return err; | |
950 | } | |
951 | ||
1da177e4 LT |
952 | /* |
953 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
954 | * what to do with it - that's up to the protocol still. | |
955 | */ | |
956 | ||
957 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
958 | { | |
959 | struct socket *sock; | |
881d966b | 960 | struct sock *sk; |
1da177e4 LT |
961 | void __user *argp = (void __user *)arg; |
962 | int pid, err; | |
881d966b | 963 | struct net *net; |
1da177e4 | 964 | |
b69aee04 | 965 | sock = file->private_data; |
881d966b | 966 | sk = sock->sk; |
3b1e0a65 | 967 | net = sock_net(sk); |
1da177e4 | 968 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 969 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 970 | } else |
3d23e349 | 971 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 972 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 973 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 974 | } else |
3d23e349 | 975 | #endif |
89bddce5 | 976 | switch (cmd) { |
1da177e4 LT |
977 | case FIOSETOWN: |
978 | case SIOCSPGRP: | |
979 | err = -EFAULT; | |
980 | if (get_user(pid, (int __user *)argp)) | |
981 | break; | |
982 | err = f_setown(sock->file, pid, 1); | |
983 | break; | |
984 | case FIOGETOWN: | |
985 | case SIOCGPGRP: | |
609d7fa9 | 986 | err = put_user(f_getown(sock->file), |
89bddce5 | 987 | (int __user *)argp); |
1da177e4 LT |
988 | break; |
989 | case SIOCGIFBR: | |
990 | case SIOCSIFBR: | |
991 | case SIOCBRADDBR: | |
992 | case SIOCBRDELBR: | |
993 | err = -ENOPKG; | |
994 | if (!br_ioctl_hook) | |
995 | request_module("bridge"); | |
996 | ||
4a3e2f71 | 997 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 998 | if (br_ioctl_hook) |
881d966b | 999 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1000 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1001 | break; |
1002 | case SIOCGIFVLAN: | |
1003 | case SIOCSIFVLAN: | |
1004 | err = -ENOPKG; | |
1005 | if (!vlan_ioctl_hook) | |
1006 | request_module("8021q"); | |
1007 | ||
4a3e2f71 | 1008 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1009 | if (vlan_ioctl_hook) |
881d966b | 1010 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1011 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1012 | break; |
1da177e4 LT |
1013 | case SIOCADDDLCI: |
1014 | case SIOCDELDLCI: | |
1015 | err = -ENOPKG; | |
1016 | if (!dlci_ioctl_hook) | |
1017 | request_module("dlci"); | |
1018 | ||
7512cbf6 PE |
1019 | mutex_lock(&dlci_ioctl_mutex); |
1020 | if (dlci_ioctl_hook) | |
1da177e4 | 1021 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1022 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1023 | break; |
1024 | default: | |
6b96018b | 1025 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1026 | break; |
89bddce5 | 1027 | } |
1da177e4 LT |
1028 | return err; |
1029 | } | |
1030 | ||
1031 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1032 | { | |
1033 | int err; | |
1034 | struct socket *sock = NULL; | |
89bddce5 | 1035 | |
1da177e4 LT |
1036 | err = security_socket_create(family, type, protocol, 1); |
1037 | if (err) | |
1038 | goto out; | |
1039 | ||
1040 | sock = sock_alloc(); | |
1041 | if (!sock) { | |
1042 | err = -ENOMEM; | |
1043 | goto out; | |
1044 | } | |
1045 | ||
1da177e4 | 1046 | sock->type = type; |
7420ed23 VY |
1047 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1048 | if (err) | |
1049 | goto out_release; | |
1050 | ||
1da177e4 LT |
1051 | out: |
1052 | *res = sock; | |
1053 | return err; | |
7420ed23 VY |
1054 | out_release: |
1055 | sock_release(sock); | |
1056 | sock = NULL; | |
1057 | goto out; | |
1da177e4 | 1058 | } |
c6d409cf | 1059 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1060 | |
1061 | /* No kernel lock held - perfect */ | |
89bddce5 | 1062 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1063 | { |
1064 | struct socket *sock; | |
1065 | ||
1066 | /* | |
89bddce5 | 1067 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1068 | */ |
b69aee04 | 1069 | sock = file->private_data; |
1da177e4 LT |
1070 | return sock->ops->poll(file, sock, wait); |
1071 | } | |
1072 | ||
89bddce5 | 1073 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1074 | { |
b69aee04 | 1075 | struct socket *sock = file->private_data; |
1da177e4 LT |
1076 | |
1077 | return sock->ops->mmap(file, sock, vma); | |
1078 | } | |
1079 | ||
20380731 | 1080 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1081 | { |
1082 | /* | |
89bddce5 SH |
1083 | * It was possible the inode is NULL we were |
1084 | * closing an unfinished socket. | |
1da177e4 LT |
1085 | */ |
1086 | ||
89bddce5 | 1087 | if (!inode) { |
1da177e4 LT |
1088 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1089 | return 0; | |
1090 | } | |
1da177e4 LT |
1091 | sock_release(SOCKET_I(inode)); |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | /* | |
1096 | * Update the socket async list | |
1097 | * | |
1098 | * Fasync_list locking strategy. | |
1099 | * | |
1100 | * 1. fasync_list is modified only under process context socket lock | |
1101 | * i.e. under semaphore. | |
1102 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1103 | * or under socket lock |
1da177e4 LT |
1104 | */ |
1105 | ||
1106 | static int sock_fasync(int fd, struct file *filp, int on) | |
1107 | { | |
989a2979 ED |
1108 | struct socket *sock = filp->private_data; |
1109 | struct sock *sk = sock->sk; | |
1da177e4 | 1110 | |
989a2979 | 1111 | if (sk == NULL) |
1da177e4 | 1112 | return -EINVAL; |
1da177e4 LT |
1113 | |
1114 | lock_sock(sk); | |
1115 | ||
43815482 | 1116 | fasync_helper(fd, filp, on, &sock->wq->fasync_list); |
1da177e4 | 1117 | |
43815482 | 1118 | if (!sock->wq->fasync_list) |
989a2979 ED |
1119 | sock_reset_flag(sk, SOCK_FASYNC); |
1120 | else | |
bcdce719 | 1121 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1122 | |
989a2979 | 1123 | release_sock(sk); |
1da177e4 LT |
1124 | return 0; |
1125 | } | |
1126 | ||
43815482 | 1127 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1128 | |
1129 | int sock_wake_async(struct socket *sock, int how, int band) | |
1130 | { | |
43815482 ED |
1131 | struct socket_wq *wq; |
1132 | ||
1133 | if (!sock) | |
1134 | return -1; | |
1135 | rcu_read_lock(); | |
1136 | wq = rcu_dereference(sock->wq); | |
1137 | if (!wq || !wq->fasync_list) { | |
1138 | rcu_read_unlock(); | |
1da177e4 | 1139 | return -1; |
43815482 | 1140 | } |
89bddce5 | 1141 | switch (how) { |
8d8ad9d7 | 1142 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1143 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1144 | break; | |
1145 | goto call_kill; | |
8d8ad9d7 | 1146 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1147 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1148 | break; | |
1149 | /* fall through */ | |
8d8ad9d7 | 1150 | case SOCK_WAKE_IO: |
89bddce5 | 1151 | call_kill: |
43815482 | 1152 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1153 | break; |
8d8ad9d7 | 1154 | case SOCK_WAKE_URG: |
43815482 | 1155 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1156 | } |
43815482 | 1157 | rcu_read_unlock(); |
1da177e4 LT |
1158 | return 0; |
1159 | } | |
c6d409cf | 1160 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1161 | |
721db93a | 1162 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1163 | struct socket **res, int kern) |
1da177e4 LT |
1164 | { |
1165 | int err; | |
1166 | struct socket *sock; | |
55737fda | 1167 | const struct net_proto_family *pf; |
1da177e4 LT |
1168 | |
1169 | /* | |
89bddce5 | 1170 | * Check protocol is in range |
1da177e4 LT |
1171 | */ |
1172 | if (family < 0 || family >= NPROTO) | |
1173 | return -EAFNOSUPPORT; | |
1174 | if (type < 0 || type >= SOCK_MAX) | |
1175 | return -EINVAL; | |
1176 | ||
1177 | /* Compatibility. | |
1178 | ||
1179 | This uglymoron is moved from INET layer to here to avoid | |
1180 | deadlock in module load. | |
1181 | */ | |
1182 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1183 | static int warned; |
1da177e4 LT |
1184 | if (!warned) { |
1185 | warned = 1; | |
89bddce5 SH |
1186 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1187 | current->comm); | |
1da177e4 LT |
1188 | } |
1189 | family = PF_PACKET; | |
1190 | } | |
1191 | ||
1192 | err = security_socket_create(family, type, protocol, kern); | |
1193 | if (err) | |
1194 | return err; | |
89bddce5 | 1195 | |
55737fda SH |
1196 | /* |
1197 | * Allocate the socket and allow the family to set things up. if | |
1198 | * the protocol is 0, the family is instructed to select an appropriate | |
1199 | * default. | |
1200 | */ | |
1201 | sock = sock_alloc(); | |
1202 | if (!sock) { | |
1203 | if (net_ratelimit()) | |
1204 | printk(KERN_WARNING "socket: no more sockets\n"); | |
1205 | return -ENFILE; /* Not exactly a match, but its the | |
1206 | closest posix thing */ | |
1207 | } | |
1208 | ||
1209 | sock->type = type; | |
1210 | ||
95a5afca | 1211 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1212 | /* Attempt to load a protocol module if the find failed. |
1213 | * | |
1214 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1215 | * requested real, full-featured networking support upon configuration. |
1216 | * Otherwise module support will break! | |
1217 | */ | |
55737fda | 1218 | if (net_families[family] == NULL) |
89bddce5 | 1219 | request_module("net-pf-%d", family); |
1da177e4 LT |
1220 | #endif |
1221 | ||
55737fda SH |
1222 | rcu_read_lock(); |
1223 | pf = rcu_dereference(net_families[family]); | |
1224 | err = -EAFNOSUPPORT; | |
1225 | if (!pf) | |
1226 | goto out_release; | |
1da177e4 LT |
1227 | |
1228 | /* | |
1229 | * We will call the ->create function, that possibly is in a loadable | |
1230 | * module, so we have to bump that loadable module refcnt first. | |
1231 | */ | |
55737fda | 1232 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1233 | goto out_release; |
1234 | ||
55737fda SH |
1235 | /* Now protected by module ref count */ |
1236 | rcu_read_unlock(); | |
1237 | ||
3f378b68 | 1238 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1239 | if (err < 0) |
1da177e4 | 1240 | goto out_module_put; |
a79af59e | 1241 | |
1da177e4 LT |
1242 | /* |
1243 | * Now to bump the refcnt of the [loadable] module that owns this | |
1244 | * socket at sock_release time we decrement its refcnt. | |
1245 | */ | |
55737fda SH |
1246 | if (!try_module_get(sock->ops->owner)) |
1247 | goto out_module_busy; | |
1248 | ||
1da177e4 LT |
1249 | /* |
1250 | * Now that we're done with the ->create function, the [loadable] | |
1251 | * module can have its refcnt decremented | |
1252 | */ | |
55737fda | 1253 | module_put(pf->owner); |
7420ed23 VY |
1254 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1255 | if (err) | |
3b185525 | 1256 | goto out_sock_release; |
55737fda | 1257 | *res = sock; |
1da177e4 | 1258 | |
55737fda SH |
1259 | return 0; |
1260 | ||
1261 | out_module_busy: | |
1262 | err = -EAFNOSUPPORT; | |
1da177e4 | 1263 | out_module_put: |
55737fda SH |
1264 | sock->ops = NULL; |
1265 | module_put(pf->owner); | |
1266 | out_sock_release: | |
1da177e4 | 1267 | sock_release(sock); |
55737fda SH |
1268 | return err; |
1269 | ||
1270 | out_release: | |
1271 | rcu_read_unlock(); | |
1272 | goto out_sock_release; | |
1da177e4 | 1273 | } |
721db93a | 1274 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1275 | |
1276 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1277 | { | |
1b8d7ae4 | 1278 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1279 | } |
c6d409cf | 1280 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1281 | |
1282 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1283 | { | |
1b8d7ae4 | 1284 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1285 | } |
c6d409cf | 1286 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1287 | |
3e0fa65f | 1288 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1289 | { |
1290 | int retval; | |
1291 | struct socket *sock; | |
a677a039 UD |
1292 | int flags; |
1293 | ||
e38b36f3 UD |
1294 | /* Check the SOCK_* constants for consistency. */ |
1295 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1296 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1297 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1298 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1299 | ||
a677a039 | 1300 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1301 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1302 | return -EINVAL; |
1303 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1304 | |
aaca0bdc UD |
1305 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1306 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1307 | ||
1da177e4 LT |
1308 | retval = sock_create(family, type, protocol, &sock); |
1309 | if (retval < 0) | |
1310 | goto out; | |
1311 | ||
77d27200 | 1312 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1313 | if (retval < 0) |
1314 | goto out_release; | |
1315 | ||
1316 | out: | |
1317 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1318 | return retval; | |
1319 | ||
1320 | out_release: | |
1321 | sock_release(sock); | |
1322 | return retval; | |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | * Create a pair of connected sockets. | |
1327 | */ | |
1328 | ||
3e0fa65f HC |
1329 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1330 | int __user *, usockvec) | |
1da177e4 LT |
1331 | { |
1332 | struct socket *sock1, *sock2; | |
1333 | int fd1, fd2, err; | |
db349509 | 1334 | struct file *newfile1, *newfile2; |
a677a039 UD |
1335 | int flags; |
1336 | ||
1337 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1338 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1339 | return -EINVAL; |
1340 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1341 | |
aaca0bdc UD |
1342 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1343 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1344 | ||
1da177e4 LT |
1345 | /* |
1346 | * Obtain the first socket and check if the underlying protocol | |
1347 | * supports the socketpair call. | |
1348 | */ | |
1349 | ||
1350 | err = sock_create(family, type, protocol, &sock1); | |
1351 | if (err < 0) | |
1352 | goto out; | |
1353 | ||
1354 | err = sock_create(family, type, protocol, &sock2); | |
1355 | if (err < 0) | |
1356 | goto out_release_1; | |
1357 | ||
1358 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1359 | if (err < 0) |
1da177e4 LT |
1360 | goto out_release_both; |
1361 | ||
7cbe66b6 | 1362 | fd1 = sock_alloc_file(sock1, &newfile1, flags); |
bf3c23d1 DM |
1363 | if (unlikely(fd1 < 0)) { |
1364 | err = fd1; | |
db349509 | 1365 | goto out_release_both; |
bf3c23d1 | 1366 | } |
1da177e4 | 1367 | |
7cbe66b6 | 1368 | fd2 = sock_alloc_file(sock2, &newfile2, flags); |
198de4d7 AV |
1369 | if (unlikely(fd2 < 0)) { |
1370 | err = fd2; | |
1371 | fput(newfile1); | |
1372 | put_unused_fd(fd1); | |
1373 | sock_release(sock2); | |
1374 | goto out; | |
db349509 AV |
1375 | } |
1376 | ||
157cf649 | 1377 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1378 | fd_install(fd1, newfile1); |
1379 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1380 | /* fd1 and fd2 may be already another descriptors. |
1381 | * Not kernel problem. | |
1382 | */ | |
1383 | ||
89bddce5 | 1384 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1385 | if (!err) |
1386 | err = put_user(fd2, &usockvec[1]); | |
1387 | if (!err) | |
1388 | return 0; | |
1389 | ||
1390 | sys_close(fd2); | |
1391 | sys_close(fd1); | |
1392 | return err; | |
1393 | ||
1da177e4 | 1394 | out_release_both: |
89bddce5 | 1395 | sock_release(sock2); |
1da177e4 | 1396 | out_release_1: |
89bddce5 | 1397 | sock_release(sock1); |
1da177e4 LT |
1398 | out: |
1399 | return err; | |
1400 | } | |
1401 | ||
1da177e4 LT |
1402 | /* |
1403 | * Bind a name to a socket. Nothing much to do here since it's | |
1404 | * the protocol's responsibility to handle the local address. | |
1405 | * | |
1406 | * We move the socket address to kernel space before we call | |
1407 | * the protocol layer (having also checked the address is ok). | |
1408 | */ | |
1409 | ||
20f37034 | 1410 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1411 | { |
1412 | struct socket *sock; | |
230b1839 | 1413 | struct sockaddr_storage address; |
6cb153ca | 1414 | int err, fput_needed; |
1da177e4 | 1415 | |
89bddce5 | 1416 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1417 | if (sock) { |
230b1839 | 1418 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
89bddce5 SH |
1419 | if (err >= 0) { |
1420 | err = security_socket_bind(sock, | |
230b1839 | 1421 | (struct sockaddr *)&address, |
89bddce5 | 1422 | addrlen); |
6cb153ca BL |
1423 | if (!err) |
1424 | err = sock->ops->bind(sock, | |
89bddce5 | 1425 | (struct sockaddr *) |
230b1839 | 1426 | &address, addrlen); |
1da177e4 | 1427 | } |
6cb153ca | 1428 | fput_light(sock->file, fput_needed); |
89bddce5 | 1429 | } |
1da177e4 LT |
1430 | return err; |
1431 | } | |
1432 | ||
1da177e4 LT |
1433 | /* |
1434 | * Perform a listen. Basically, we allow the protocol to do anything | |
1435 | * necessary for a listen, and if that works, we mark the socket as | |
1436 | * ready for listening. | |
1437 | */ | |
1438 | ||
3e0fa65f | 1439 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1440 | { |
1441 | struct socket *sock; | |
6cb153ca | 1442 | int err, fput_needed; |
b8e1f9b5 | 1443 | int somaxconn; |
89bddce5 SH |
1444 | |
1445 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1446 | if (sock) { | |
8efa6e93 | 1447 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
b8e1f9b5 PE |
1448 | if ((unsigned)backlog > somaxconn) |
1449 | backlog = somaxconn; | |
1da177e4 LT |
1450 | |
1451 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1452 | if (!err) |
1453 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1454 | |
6cb153ca | 1455 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1456 | } |
1457 | return err; | |
1458 | } | |
1459 | ||
1da177e4 LT |
1460 | /* |
1461 | * For accept, we attempt to create a new socket, set up the link | |
1462 | * with the client, wake up the client, then return the new | |
1463 | * connected fd. We collect the address of the connector in kernel | |
1464 | * space and move it to user at the very end. This is unclean because | |
1465 | * we open the socket then return an error. | |
1466 | * | |
1467 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1468 | * status to recvmsg. We need to add that support in a way thats | |
1469 | * clean when we restucture accept also. | |
1470 | */ | |
1471 | ||
20f37034 HC |
1472 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1473 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1474 | { |
1475 | struct socket *sock, *newsock; | |
39d8c1b6 | 1476 | struct file *newfile; |
6cb153ca | 1477 | int err, len, newfd, fput_needed; |
230b1839 | 1478 | struct sockaddr_storage address; |
1da177e4 | 1479 | |
77d27200 | 1480 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1481 | return -EINVAL; |
1482 | ||
1483 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1484 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1485 | ||
6cb153ca | 1486 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1487 | if (!sock) |
1488 | goto out; | |
1489 | ||
1490 | err = -ENFILE; | |
c6d409cf ED |
1491 | newsock = sock_alloc(); |
1492 | if (!newsock) | |
1da177e4 LT |
1493 | goto out_put; |
1494 | ||
1495 | newsock->type = sock->type; | |
1496 | newsock->ops = sock->ops; | |
1497 | ||
1da177e4 LT |
1498 | /* |
1499 | * We don't need try_module_get here, as the listening socket (sock) | |
1500 | * has the protocol module (sock->ops->owner) held. | |
1501 | */ | |
1502 | __module_get(newsock->ops->owner); | |
1503 | ||
7cbe66b6 | 1504 | newfd = sock_alloc_file(newsock, &newfile, flags); |
39d8c1b6 DM |
1505 | if (unlikely(newfd < 0)) { |
1506 | err = newfd; | |
9a1875e6 DM |
1507 | sock_release(newsock); |
1508 | goto out_put; | |
39d8c1b6 DM |
1509 | } |
1510 | ||
a79af59e FF |
1511 | err = security_socket_accept(sock, newsock); |
1512 | if (err) | |
39d8c1b6 | 1513 | goto out_fd; |
a79af59e | 1514 | |
1da177e4 LT |
1515 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1516 | if (err < 0) | |
39d8c1b6 | 1517 | goto out_fd; |
1da177e4 LT |
1518 | |
1519 | if (upeer_sockaddr) { | |
230b1839 | 1520 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1521 | &len, 2) < 0) { |
1da177e4 | 1522 | err = -ECONNABORTED; |
39d8c1b6 | 1523 | goto out_fd; |
1da177e4 | 1524 | } |
230b1839 YH |
1525 | err = move_addr_to_user((struct sockaddr *)&address, |
1526 | len, upeer_sockaddr, upeer_addrlen); | |
1da177e4 | 1527 | if (err < 0) |
39d8c1b6 | 1528 | goto out_fd; |
1da177e4 LT |
1529 | } |
1530 | ||
1531 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1532 | ||
39d8c1b6 DM |
1533 | fd_install(newfd, newfile); |
1534 | err = newfd; | |
1da177e4 | 1535 | |
1da177e4 | 1536 | out_put: |
6cb153ca | 1537 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1538 | out: |
1539 | return err; | |
39d8c1b6 | 1540 | out_fd: |
9606a216 | 1541 | fput(newfile); |
39d8c1b6 | 1542 | put_unused_fd(newfd); |
1da177e4 LT |
1543 | goto out_put; |
1544 | } | |
1545 | ||
20f37034 HC |
1546 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1547 | int __user *, upeer_addrlen) | |
aaca0bdc | 1548 | { |
de11defe | 1549 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1550 | } |
1551 | ||
1da177e4 LT |
1552 | /* |
1553 | * Attempt to connect to a socket with the server address. The address | |
1554 | * is in user space so we verify it is OK and move it to kernel space. | |
1555 | * | |
1556 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1557 | * break bindings | |
1558 | * | |
1559 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1560 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1561 | * include the -EINPROGRESS status for such sockets. | |
1562 | */ | |
1563 | ||
20f37034 HC |
1564 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1565 | int, addrlen) | |
1da177e4 LT |
1566 | { |
1567 | struct socket *sock; | |
230b1839 | 1568 | struct sockaddr_storage address; |
6cb153ca | 1569 | int err, fput_needed; |
1da177e4 | 1570 | |
6cb153ca | 1571 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1572 | if (!sock) |
1573 | goto out; | |
230b1839 | 1574 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
1da177e4 LT |
1575 | if (err < 0) |
1576 | goto out_put; | |
1577 | ||
89bddce5 | 1578 | err = |
230b1839 | 1579 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1580 | if (err) |
1581 | goto out_put; | |
1582 | ||
230b1839 | 1583 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1584 | sock->file->f_flags); |
1585 | out_put: | |
6cb153ca | 1586 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1587 | out: |
1588 | return err; | |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * Get the local address ('name') of a socket object. Move the obtained | |
1593 | * name to user space. | |
1594 | */ | |
1595 | ||
20f37034 HC |
1596 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1597 | int __user *, usockaddr_len) | |
1da177e4 LT |
1598 | { |
1599 | struct socket *sock; | |
230b1839 | 1600 | struct sockaddr_storage address; |
6cb153ca | 1601 | int len, err, fput_needed; |
89bddce5 | 1602 | |
6cb153ca | 1603 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1604 | if (!sock) |
1605 | goto out; | |
1606 | ||
1607 | err = security_socket_getsockname(sock); | |
1608 | if (err) | |
1609 | goto out_put; | |
1610 | ||
230b1839 | 1611 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1612 | if (err) |
1613 | goto out_put; | |
230b1839 | 1614 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1615 | |
1616 | out_put: | |
6cb153ca | 1617 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1618 | out: |
1619 | return err; | |
1620 | } | |
1621 | ||
1622 | /* | |
1623 | * Get the remote address ('name') of a socket object. Move the obtained | |
1624 | * name to user space. | |
1625 | */ | |
1626 | ||
20f37034 HC |
1627 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1628 | int __user *, usockaddr_len) | |
1da177e4 LT |
1629 | { |
1630 | struct socket *sock; | |
230b1839 | 1631 | struct sockaddr_storage address; |
6cb153ca | 1632 | int len, err, fput_needed; |
1da177e4 | 1633 | |
89bddce5 SH |
1634 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1635 | if (sock != NULL) { | |
1da177e4 LT |
1636 | err = security_socket_getpeername(sock); |
1637 | if (err) { | |
6cb153ca | 1638 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1639 | return err; |
1640 | } | |
1641 | ||
89bddce5 | 1642 | err = |
230b1839 | 1643 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1644 | 1); |
1da177e4 | 1645 | if (!err) |
230b1839 | 1646 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
89bddce5 | 1647 | usockaddr_len); |
6cb153ca | 1648 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1649 | } |
1650 | return err; | |
1651 | } | |
1652 | ||
1653 | /* | |
1654 | * Send a datagram to a given address. We move the address into kernel | |
1655 | * space and check the user space data area is readable before invoking | |
1656 | * the protocol. | |
1657 | */ | |
1658 | ||
3e0fa65f HC |
1659 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
1660 | unsigned, flags, struct sockaddr __user *, addr, | |
1661 | int, addr_len) | |
1da177e4 LT |
1662 | { |
1663 | struct socket *sock; | |
230b1839 | 1664 | struct sockaddr_storage address; |
1da177e4 LT |
1665 | int err; |
1666 | struct msghdr msg; | |
1667 | struct iovec iov; | |
6cb153ca | 1668 | int fput_needed; |
6cb153ca | 1669 | |
253eacc0 LT |
1670 | if (len > INT_MAX) |
1671 | len = INT_MAX; | |
de0fa95c PE |
1672 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1673 | if (!sock) | |
4387ff75 | 1674 | goto out; |
6cb153ca | 1675 | |
89bddce5 SH |
1676 | iov.iov_base = buff; |
1677 | iov.iov_len = len; | |
1678 | msg.msg_name = NULL; | |
1679 | msg.msg_iov = &iov; | |
1680 | msg.msg_iovlen = 1; | |
1681 | msg.msg_control = NULL; | |
1682 | msg.msg_controllen = 0; | |
1683 | msg.msg_namelen = 0; | |
6cb153ca | 1684 | if (addr) { |
230b1839 | 1685 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
1da177e4 LT |
1686 | if (err < 0) |
1687 | goto out_put; | |
230b1839 | 1688 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1689 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1690 | } |
1691 | if (sock->file->f_flags & O_NONBLOCK) | |
1692 | flags |= MSG_DONTWAIT; | |
1693 | msg.msg_flags = flags; | |
1694 | err = sock_sendmsg(sock, &msg, len); | |
1695 | ||
89bddce5 | 1696 | out_put: |
de0fa95c | 1697 | fput_light(sock->file, fput_needed); |
4387ff75 | 1698 | out: |
1da177e4 LT |
1699 | return err; |
1700 | } | |
1701 | ||
1702 | /* | |
89bddce5 | 1703 | * Send a datagram down a socket. |
1da177e4 LT |
1704 | */ |
1705 | ||
3e0fa65f HC |
1706 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
1707 | unsigned, flags) | |
1da177e4 LT |
1708 | { |
1709 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1710 | } | |
1711 | ||
1712 | /* | |
89bddce5 | 1713 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1714 | * sender. We verify the buffers are writable and if needed move the |
1715 | * sender address from kernel to user space. | |
1716 | */ | |
1717 | ||
3e0fa65f HC |
1718 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
1719 | unsigned, flags, struct sockaddr __user *, addr, | |
1720 | int __user *, addr_len) | |
1da177e4 LT |
1721 | { |
1722 | struct socket *sock; | |
1723 | struct iovec iov; | |
1724 | struct msghdr msg; | |
230b1839 | 1725 | struct sockaddr_storage address; |
89bddce5 | 1726 | int err, err2; |
6cb153ca BL |
1727 | int fput_needed; |
1728 | ||
253eacc0 LT |
1729 | if (size > INT_MAX) |
1730 | size = INT_MAX; | |
de0fa95c | 1731 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1732 | if (!sock) |
de0fa95c | 1733 | goto out; |
1da177e4 | 1734 | |
89bddce5 SH |
1735 | msg.msg_control = NULL; |
1736 | msg.msg_controllen = 0; | |
1737 | msg.msg_iovlen = 1; | |
1738 | msg.msg_iov = &iov; | |
1739 | iov.iov_len = size; | |
1740 | iov.iov_base = ubuf; | |
230b1839 YH |
1741 | msg.msg_name = (struct sockaddr *)&address; |
1742 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1743 | if (sock->file->f_flags & O_NONBLOCK) |
1744 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1745 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1746 | |
89bddce5 | 1747 | if (err >= 0 && addr != NULL) { |
230b1839 YH |
1748 | err2 = move_addr_to_user((struct sockaddr *)&address, |
1749 | msg.msg_namelen, addr, addr_len); | |
89bddce5 SH |
1750 | if (err2 < 0) |
1751 | err = err2; | |
1da177e4 | 1752 | } |
de0fa95c PE |
1753 | |
1754 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1755 | out: |
1da177e4 LT |
1756 | return err; |
1757 | } | |
1758 | ||
1759 | /* | |
89bddce5 | 1760 | * Receive a datagram from a socket. |
1da177e4 LT |
1761 | */ |
1762 | ||
89bddce5 SH |
1763 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
1764 | unsigned flags) | |
1da177e4 LT |
1765 | { |
1766 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Set a socket option. Because we don't know the option lengths we have | |
1771 | * to pass the user mode parameter for the protocols to sort out. | |
1772 | */ | |
1773 | ||
20f37034 HC |
1774 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1775 | char __user *, optval, int, optlen) | |
1da177e4 | 1776 | { |
6cb153ca | 1777 | int err, fput_needed; |
1da177e4 LT |
1778 | struct socket *sock; |
1779 | ||
1780 | if (optlen < 0) | |
1781 | return -EINVAL; | |
89bddce5 SH |
1782 | |
1783 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1784 | if (sock != NULL) { | |
1785 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1786 | if (err) |
1787 | goto out_put; | |
1da177e4 LT |
1788 | |
1789 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1790 | err = |
1791 | sock_setsockopt(sock, level, optname, optval, | |
1792 | optlen); | |
1da177e4 | 1793 | else |
89bddce5 SH |
1794 | err = |
1795 | sock->ops->setsockopt(sock, level, optname, optval, | |
1796 | optlen); | |
6cb153ca BL |
1797 | out_put: |
1798 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1799 | } |
1800 | return err; | |
1801 | } | |
1802 | ||
1803 | /* | |
1804 | * Get a socket option. Because we don't know the option lengths we have | |
1805 | * to pass a user mode parameter for the protocols to sort out. | |
1806 | */ | |
1807 | ||
20f37034 HC |
1808 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1809 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1810 | { |
6cb153ca | 1811 | int err, fput_needed; |
1da177e4 LT |
1812 | struct socket *sock; |
1813 | ||
89bddce5 SH |
1814 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1815 | if (sock != NULL) { | |
6cb153ca BL |
1816 | err = security_socket_getsockopt(sock, level, optname); |
1817 | if (err) | |
1818 | goto out_put; | |
1da177e4 LT |
1819 | |
1820 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1821 | err = |
1822 | sock_getsockopt(sock, level, optname, optval, | |
1823 | optlen); | |
1da177e4 | 1824 | else |
89bddce5 SH |
1825 | err = |
1826 | sock->ops->getsockopt(sock, level, optname, optval, | |
1827 | optlen); | |
6cb153ca BL |
1828 | out_put: |
1829 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1830 | } |
1831 | return err; | |
1832 | } | |
1833 | ||
1da177e4 LT |
1834 | /* |
1835 | * Shutdown a socket. | |
1836 | */ | |
1837 | ||
754fe8d2 | 1838 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1839 | { |
6cb153ca | 1840 | int err, fput_needed; |
1da177e4 LT |
1841 | struct socket *sock; |
1842 | ||
89bddce5 SH |
1843 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1844 | if (sock != NULL) { | |
1da177e4 | 1845 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1846 | if (!err) |
1847 | err = sock->ops->shutdown(sock, how); | |
1848 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1849 | } |
1850 | return err; | |
1851 | } | |
1852 | ||
89bddce5 | 1853 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1854 | * fields which are the same type (int / unsigned) on our platforms. |
1855 | */ | |
1856 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1857 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1858 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1859 | ||
1da177e4 LT |
1860 | /* |
1861 | * BSD sendmsg interface | |
1862 | */ | |
1863 | ||
3e0fa65f | 1864 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
1da177e4 | 1865 | { |
89bddce5 SH |
1866 | struct compat_msghdr __user *msg_compat = |
1867 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1868 | struct socket *sock; |
230b1839 | 1869 | struct sockaddr_storage address; |
1da177e4 | 1870 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1871 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1872 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1873 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 LT |
1874 | unsigned char *ctl_buf = ctl; |
1875 | struct msghdr msg_sys; | |
1876 | int err, ctl_len, iov_size, total_len; | |
6cb153ca | 1877 | int fput_needed; |
89bddce5 | 1878 | |
1da177e4 LT |
1879 | err = -EFAULT; |
1880 | if (MSG_CMSG_COMPAT & flags) { | |
1881 | if (get_compat_msghdr(&msg_sys, msg_compat)) | |
1882 | return -EFAULT; | |
c6d409cf | 1883 | } else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) |
1da177e4 LT |
1884 | return -EFAULT; |
1885 | ||
6cb153ca | 1886 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
89bddce5 | 1887 | if (!sock) |
1da177e4 LT |
1888 | goto out; |
1889 | ||
1890 | /* do not move before msg_sys is valid */ | |
1891 | err = -EMSGSIZE; | |
1892 | if (msg_sys.msg_iovlen > UIO_MAXIOV) | |
1893 | goto out_put; | |
1894 | ||
89bddce5 | 1895 | /* Check whether to allocate the iovec area */ |
1da177e4 LT |
1896 | err = -ENOMEM; |
1897 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); | |
1898 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { | |
1899 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); | |
1900 | if (!iov) | |
1901 | goto out_put; | |
1902 | } | |
1903 | ||
1904 | /* This will also move the address data into kernel space */ | |
1905 | if (MSG_CMSG_COMPAT & flags) { | |
230b1839 YH |
1906 | err = verify_compat_iovec(&msg_sys, iov, |
1907 | (struct sockaddr *)&address, | |
1908 | VERIFY_READ); | |
1da177e4 | 1909 | } else |
230b1839 YH |
1910 | err = verify_iovec(&msg_sys, iov, |
1911 | (struct sockaddr *)&address, | |
1912 | VERIFY_READ); | |
89bddce5 | 1913 | if (err < 0) |
1da177e4 LT |
1914 | goto out_freeiov; |
1915 | total_len = err; | |
1916 | ||
1917 | err = -ENOBUFS; | |
1918 | ||
1919 | if (msg_sys.msg_controllen > INT_MAX) | |
1920 | goto out_freeiov; | |
89bddce5 | 1921 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1922 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 SH |
1923 | err = |
1924 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, | |
1925 | sizeof(ctl)); | |
1da177e4 LT |
1926 | if (err) |
1927 | goto out_freeiov; | |
1928 | ctl_buf = msg_sys.msg_control; | |
8920e8f9 | 1929 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1930 | } else if (ctl_len) { |
89bddce5 | 1931 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1932 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1933 | if (ctl_buf == NULL) |
1da177e4 LT |
1934 | goto out_freeiov; |
1935 | } | |
1936 | err = -EFAULT; | |
1937 | /* | |
1938 | * Careful! Before this, msg_sys.msg_control contains a user pointer. | |
1939 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted | |
1940 | * checking falls down on this. | |
1941 | */ | |
fb8621bb NK |
1942 | if (copy_from_user(ctl_buf, |
1943 | (void __user __force *)msg_sys.msg_control, | |
89bddce5 | 1944 | ctl_len)) |
1da177e4 LT |
1945 | goto out_freectl; |
1946 | msg_sys.msg_control = ctl_buf; | |
1947 | } | |
1948 | msg_sys.msg_flags = flags; | |
1949 | ||
1950 | if (sock->file->f_flags & O_NONBLOCK) | |
1951 | msg_sys.msg_flags |= MSG_DONTWAIT; | |
1952 | err = sock_sendmsg(sock, &msg_sys, total_len); | |
1953 | ||
1954 | out_freectl: | |
89bddce5 | 1955 | if (ctl_buf != ctl) |
1da177e4 LT |
1956 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
1957 | out_freeiov: | |
1958 | if (iov != iovstack) | |
1959 | sock_kfree_s(sock->sk, iov, iov_size); | |
1960 | out_put: | |
6cb153ca | 1961 | fput_light(sock->file, fput_needed); |
89bddce5 | 1962 | out: |
1da177e4 LT |
1963 | return err; |
1964 | } | |
1965 | ||
a2e27255 ACM |
1966 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
1967 | struct msghdr *msg_sys, unsigned flags, int nosec) | |
1da177e4 | 1968 | { |
89bddce5 SH |
1969 | struct compat_msghdr __user *msg_compat = |
1970 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1971 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 1972 | struct iovec *iov = iovstack; |
1da177e4 LT |
1973 | unsigned long cmsg_ptr; |
1974 | int err, iov_size, total_len, len; | |
1975 | ||
1976 | /* kernel mode address */ | |
230b1839 | 1977 | struct sockaddr_storage addr; |
1da177e4 LT |
1978 | |
1979 | /* user mode address pointers */ | |
1980 | struct sockaddr __user *uaddr; | |
1981 | int __user *uaddr_len; | |
89bddce5 | 1982 | |
1da177e4 | 1983 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 1984 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1985 | return -EFAULT; |
c6d409cf | 1986 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 1987 | return -EFAULT; |
1da177e4 | 1988 | |
1da177e4 | 1989 | err = -EMSGSIZE; |
a2e27255 ACM |
1990 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
1991 | goto out; | |
89bddce5 SH |
1992 | |
1993 | /* Check whether to allocate the iovec area */ | |
1da177e4 | 1994 | err = -ENOMEM; |
a2e27255 ACM |
1995 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
1996 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { | |
1da177e4 LT |
1997 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
1998 | if (!iov) | |
a2e27255 | 1999 | goto out; |
1da177e4 LT |
2000 | } |
2001 | ||
2002 | /* | |
89bddce5 SH |
2003 | * Save the user-mode address (verify_iovec will change the |
2004 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2005 | */ |
89bddce5 | 2006 | |
a2e27255 | 2007 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2008 | uaddr_len = COMPAT_NAMELEN(msg); |
2009 | if (MSG_CMSG_COMPAT & flags) { | |
a2e27255 | 2010 | err = verify_compat_iovec(msg_sys, iov, |
230b1839 YH |
2011 | (struct sockaddr *)&addr, |
2012 | VERIFY_WRITE); | |
1da177e4 | 2013 | } else |
a2e27255 | 2014 | err = verify_iovec(msg_sys, iov, |
230b1839 YH |
2015 | (struct sockaddr *)&addr, |
2016 | VERIFY_WRITE); | |
1da177e4 LT |
2017 | if (err < 0) |
2018 | goto out_freeiov; | |
89bddce5 | 2019 | total_len = err; |
1da177e4 | 2020 | |
a2e27255 ACM |
2021 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2022 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2023 | |
1da177e4 LT |
2024 | if (sock->file->f_flags & O_NONBLOCK) |
2025 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2026 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2027 | total_len, flags); | |
1da177e4 LT |
2028 | if (err < 0) |
2029 | goto out_freeiov; | |
2030 | len = err; | |
2031 | ||
2032 | if (uaddr != NULL) { | |
230b1839 | 2033 | err = move_addr_to_user((struct sockaddr *)&addr, |
a2e27255 | 2034 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2035 | uaddr_len); |
1da177e4 LT |
2036 | if (err < 0) |
2037 | goto out_freeiov; | |
2038 | } | |
a2e27255 | 2039 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2040 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2041 | if (err) |
2042 | goto out_freeiov; | |
2043 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2044 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2045 | &msg_compat->msg_controllen); |
2046 | else | |
a2e27255 | 2047 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2048 | &msg->msg_controllen); |
2049 | if (err) | |
2050 | goto out_freeiov; | |
2051 | err = len; | |
2052 | ||
2053 | out_freeiov: | |
2054 | if (iov != iovstack) | |
2055 | sock_kfree_s(sock->sk, iov, iov_size); | |
a2e27255 ACM |
2056 | out: |
2057 | return err; | |
2058 | } | |
2059 | ||
2060 | /* | |
2061 | * BSD recvmsg interface | |
2062 | */ | |
2063 | ||
2064 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2065 | unsigned int, flags) | |
2066 | { | |
2067 | int fput_needed, err; | |
2068 | struct msghdr msg_sys; | |
2069 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2070 | ||
2071 | if (!sock) | |
2072 | goto out; | |
2073 | ||
2074 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2075 | ||
6cb153ca | 2076 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2077 | out: |
2078 | return err; | |
2079 | } | |
2080 | ||
a2e27255 ACM |
2081 | /* |
2082 | * Linux recvmmsg interface | |
2083 | */ | |
2084 | ||
2085 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2086 | unsigned int flags, struct timespec *timeout) | |
2087 | { | |
2088 | int fput_needed, err, datagrams; | |
2089 | struct socket *sock; | |
2090 | struct mmsghdr __user *entry; | |
d7256d0e | 2091 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2092 | struct msghdr msg_sys; |
2093 | struct timespec end_time; | |
2094 | ||
2095 | if (timeout && | |
2096 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2097 | timeout->tv_nsec)) | |
2098 | return -EINVAL; | |
2099 | ||
2100 | datagrams = 0; | |
2101 | ||
2102 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2103 | if (!sock) | |
2104 | return err; | |
2105 | ||
2106 | err = sock_error(sock->sk); | |
2107 | if (err) | |
2108 | goto out_put; | |
2109 | ||
2110 | entry = mmsg; | |
d7256d0e | 2111 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2112 | |
2113 | while (datagrams < vlen) { | |
2114 | /* | |
2115 | * No need to ask LSM for more than the first datagram. | |
2116 | */ | |
d7256d0e JMG |
2117 | if (MSG_CMSG_COMPAT & flags) { |
2118 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
2119 | &msg_sys, flags, datagrams); | |
2120 | if (err < 0) | |
2121 | break; | |
2122 | err = __put_user(err, &compat_entry->msg_len); | |
2123 | ++compat_entry; | |
2124 | } else { | |
2125 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
2126 | &msg_sys, flags, datagrams); | |
2127 | if (err < 0) | |
2128 | break; | |
2129 | err = put_user(err, &entry->msg_len); | |
2130 | ++entry; | |
2131 | } | |
2132 | ||
a2e27255 ACM |
2133 | if (err) |
2134 | break; | |
a2e27255 ACM |
2135 | ++datagrams; |
2136 | ||
71c5c159 BB |
2137 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2138 | if (flags & MSG_WAITFORONE) | |
2139 | flags |= MSG_DONTWAIT; | |
2140 | ||
a2e27255 ACM |
2141 | if (timeout) { |
2142 | ktime_get_ts(timeout); | |
2143 | *timeout = timespec_sub(end_time, *timeout); | |
2144 | if (timeout->tv_sec < 0) { | |
2145 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2146 | break; | |
2147 | } | |
2148 | ||
2149 | /* Timeout, return less than vlen datagrams */ | |
2150 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2151 | break; | |
2152 | } | |
2153 | ||
2154 | /* Out of band data, return right away */ | |
2155 | if (msg_sys.msg_flags & MSG_OOB) | |
2156 | break; | |
2157 | } | |
2158 | ||
2159 | out_put: | |
2160 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2161 | |
a2e27255 ACM |
2162 | if (err == 0) |
2163 | return datagrams; | |
2164 | ||
2165 | if (datagrams != 0) { | |
2166 | /* | |
2167 | * We may return less entries than requested (vlen) if the | |
2168 | * sock is non block and there aren't enough datagrams... | |
2169 | */ | |
2170 | if (err != -EAGAIN) { | |
2171 | /* | |
2172 | * ... or if recvmsg returns an error after we | |
2173 | * received some datagrams, where we record the | |
2174 | * error to return on the next call or if the | |
2175 | * app asks about it using getsockopt(SO_ERROR). | |
2176 | */ | |
2177 | sock->sk->sk_err = -err; | |
2178 | } | |
2179 | ||
2180 | return datagrams; | |
2181 | } | |
2182 | ||
2183 | return err; | |
2184 | } | |
2185 | ||
2186 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2187 | unsigned int, vlen, unsigned int, flags, | |
2188 | struct timespec __user *, timeout) | |
2189 | { | |
2190 | int datagrams; | |
2191 | struct timespec timeout_sys; | |
2192 | ||
2193 | if (!timeout) | |
2194 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2195 | ||
2196 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2197 | return -EFAULT; | |
2198 | ||
2199 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2200 | ||
2201 | if (datagrams > 0 && | |
2202 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2203 | datagrams = -EFAULT; | |
2204 | ||
2205 | return datagrams; | |
2206 | } | |
2207 | ||
2208 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2209 | /* Argument list sizes for sys_socketcall */ |
2210 | #define AL(x) ((x) * sizeof(unsigned long)) | |
a2e27255 | 2211 | static const unsigned char nargs[20] = { |
c6d409cf ED |
2212 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2213 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2214 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
2215 | AL(4), AL(5) | |
89bddce5 SH |
2216 | }; |
2217 | ||
1da177e4 LT |
2218 | #undef AL |
2219 | ||
2220 | /* | |
89bddce5 | 2221 | * System call vectors. |
1da177e4 LT |
2222 | * |
2223 | * Argument checking cleaned up. Saved 20% in size. | |
2224 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2225 | * it is set by the callees. |
1da177e4 LT |
2226 | */ |
2227 | ||
3e0fa65f | 2228 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2229 | { |
2230 | unsigned long a[6]; | |
89bddce5 | 2231 | unsigned long a0, a1; |
1da177e4 | 2232 | int err; |
47379052 | 2233 | unsigned int len; |
1da177e4 | 2234 | |
a2e27255 | 2235 | if (call < 1 || call > SYS_RECVMMSG) |
1da177e4 LT |
2236 | return -EINVAL; |
2237 | ||
47379052 AV |
2238 | len = nargs[call]; |
2239 | if (len > sizeof(a)) | |
2240 | return -EINVAL; | |
2241 | ||
1da177e4 | 2242 | /* copy_from_user should be SMP safe. */ |
47379052 | 2243 | if (copy_from_user(a, args, len)) |
1da177e4 | 2244 | return -EFAULT; |
3ec3b2fb | 2245 | |
f3298dc4 | 2246 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2247 | |
89bddce5 SH |
2248 | a0 = a[0]; |
2249 | a1 = a[1]; | |
2250 | ||
2251 | switch (call) { | |
2252 | case SYS_SOCKET: | |
2253 | err = sys_socket(a0, a1, a[2]); | |
2254 | break; | |
2255 | case SYS_BIND: | |
2256 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2257 | break; | |
2258 | case SYS_CONNECT: | |
2259 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2260 | break; | |
2261 | case SYS_LISTEN: | |
2262 | err = sys_listen(a0, a1); | |
2263 | break; | |
2264 | case SYS_ACCEPT: | |
de11defe UD |
2265 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2266 | (int __user *)a[2], 0); | |
89bddce5 SH |
2267 | break; |
2268 | case SYS_GETSOCKNAME: | |
2269 | err = | |
2270 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2271 | (int __user *)a[2]); | |
2272 | break; | |
2273 | case SYS_GETPEERNAME: | |
2274 | err = | |
2275 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2276 | (int __user *)a[2]); | |
2277 | break; | |
2278 | case SYS_SOCKETPAIR: | |
2279 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2280 | break; | |
2281 | case SYS_SEND: | |
2282 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2283 | break; | |
2284 | case SYS_SENDTO: | |
2285 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2286 | (struct sockaddr __user *)a[4], a[5]); | |
2287 | break; | |
2288 | case SYS_RECV: | |
2289 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2290 | break; | |
2291 | case SYS_RECVFROM: | |
2292 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2293 | (struct sockaddr __user *)a[4], | |
2294 | (int __user *)a[5]); | |
2295 | break; | |
2296 | case SYS_SHUTDOWN: | |
2297 | err = sys_shutdown(a0, a1); | |
2298 | break; | |
2299 | case SYS_SETSOCKOPT: | |
2300 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2301 | break; | |
2302 | case SYS_GETSOCKOPT: | |
2303 | err = | |
2304 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2305 | (int __user *)a[4]); | |
2306 | break; | |
2307 | case SYS_SENDMSG: | |
2308 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2309 | break; | |
2310 | case SYS_RECVMSG: | |
2311 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2312 | break; | |
a2e27255 ACM |
2313 | case SYS_RECVMMSG: |
2314 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2315 | (struct timespec __user *)a[4]); | |
2316 | break; | |
de11defe UD |
2317 | case SYS_ACCEPT4: |
2318 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2319 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2320 | break; |
89bddce5 SH |
2321 | default: |
2322 | err = -EINVAL; | |
2323 | break; | |
1da177e4 LT |
2324 | } |
2325 | return err; | |
2326 | } | |
2327 | ||
89bddce5 | 2328 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2329 | |
55737fda SH |
2330 | /** |
2331 | * sock_register - add a socket protocol handler | |
2332 | * @ops: description of protocol | |
2333 | * | |
1da177e4 LT |
2334 | * This function is called by a protocol handler that wants to |
2335 | * advertise its address family, and have it linked into the | |
55737fda SH |
2336 | * socket interface. The value ops->family coresponds to the |
2337 | * socket system call protocol family. | |
1da177e4 | 2338 | */ |
f0fd27d4 | 2339 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2340 | { |
2341 | int err; | |
2342 | ||
2343 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2344 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2345 | NPROTO); | |
1da177e4 LT |
2346 | return -ENOBUFS; |
2347 | } | |
55737fda SH |
2348 | |
2349 | spin_lock(&net_family_lock); | |
2350 | if (net_families[ops->family]) | |
2351 | err = -EEXIST; | |
2352 | else { | |
89bddce5 | 2353 | net_families[ops->family] = ops; |
1da177e4 LT |
2354 | err = 0; |
2355 | } | |
55737fda SH |
2356 | spin_unlock(&net_family_lock); |
2357 | ||
89bddce5 | 2358 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2359 | return err; |
2360 | } | |
c6d409cf | 2361 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2362 | |
55737fda SH |
2363 | /** |
2364 | * sock_unregister - remove a protocol handler | |
2365 | * @family: protocol family to remove | |
2366 | * | |
1da177e4 LT |
2367 | * This function is called by a protocol handler that wants to |
2368 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2369 | * new socket creation. |
2370 | * | |
2371 | * If protocol handler is a module, then it can use module reference | |
2372 | * counts to protect against new references. If protocol handler is not | |
2373 | * a module then it needs to provide its own protection in | |
2374 | * the ops->create routine. | |
1da177e4 | 2375 | */ |
f0fd27d4 | 2376 | void sock_unregister(int family) |
1da177e4 | 2377 | { |
f0fd27d4 | 2378 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2379 | |
55737fda | 2380 | spin_lock(&net_family_lock); |
89bddce5 | 2381 | net_families[family] = NULL; |
55737fda SH |
2382 | spin_unlock(&net_family_lock); |
2383 | ||
2384 | synchronize_rcu(); | |
2385 | ||
89bddce5 | 2386 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2387 | } |
c6d409cf | 2388 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2389 | |
77d76ea3 | 2390 | static int __init sock_init(void) |
1da177e4 LT |
2391 | { |
2392 | /* | |
89bddce5 | 2393 | * Initialize sock SLAB cache. |
1da177e4 | 2394 | */ |
89bddce5 | 2395 | |
1da177e4 LT |
2396 | sk_init(); |
2397 | ||
1da177e4 | 2398 | /* |
89bddce5 | 2399 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2400 | */ |
2401 | skb_init(); | |
1da177e4 LT |
2402 | |
2403 | /* | |
89bddce5 | 2404 | * Initialize the protocols module. |
1da177e4 LT |
2405 | */ |
2406 | ||
2407 | init_inodecache(); | |
2408 | register_filesystem(&sock_fs_type); | |
2409 | sock_mnt = kern_mount(&sock_fs_type); | |
77d76ea3 AK |
2410 | |
2411 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2412 | */ |
2413 | ||
2414 | #ifdef CONFIG_NETFILTER | |
2415 | netfilter_init(); | |
2416 | #endif | |
cbeb321a | 2417 | |
c1f19b51 RC |
2418 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2419 | skb_timestamping_init(); | |
2420 | #endif | |
2421 | ||
cbeb321a | 2422 | return 0; |
1da177e4 LT |
2423 | } |
2424 | ||
77d76ea3 AK |
2425 | core_initcall(sock_init); /* early initcall */ |
2426 | ||
1da177e4 LT |
2427 | #ifdef CONFIG_PROC_FS |
2428 | void socket_seq_show(struct seq_file *seq) | |
2429 | { | |
2430 | int cpu; | |
2431 | int counter = 0; | |
2432 | ||
6f912042 | 2433 | for_each_possible_cpu(cpu) |
89bddce5 | 2434 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2435 | |
2436 | /* It can be negative, by the way. 8) */ | |
2437 | if (counter < 0) | |
2438 | counter = 0; | |
2439 | ||
2440 | seq_printf(seq, "sockets: used %d\n", counter); | |
2441 | } | |
89bddce5 | 2442 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2443 | |
89bbfc95 | 2444 | #ifdef CONFIG_COMPAT |
6b96018b AB |
2445 | static int do_siocgstamp(struct net *net, struct socket *sock, |
2446 | unsigned int cmd, struct compat_timeval __user *up) | |
7a229387 | 2447 | { |
7a229387 AB |
2448 | mm_segment_t old_fs = get_fs(); |
2449 | struct timeval ktv; | |
2450 | int err; | |
2451 | ||
2452 | set_fs(KERNEL_DS); | |
6b96018b | 2453 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 AB |
2454 | set_fs(old_fs); |
2455 | if (!err) { | |
2456 | err = put_user(ktv.tv_sec, &up->tv_sec); | |
2457 | err |= __put_user(ktv.tv_usec, &up->tv_usec); | |
2458 | } | |
2459 | return err; | |
2460 | } | |
2461 | ||
6b96018b AB |
2462 | static int do_siocgstampns(struct net *net, struct socket *sock, |
2463 | unsigned int cmd, struct compat_timespec __user *up) | |
7a229387 | 2464 | { |
7a229387 AB |
2465 | mm_segment_t old_fs = get_fs(); |
2466 | struct timespec kts; | |
2467 | int err; | |
2468 | ||
2469 | set_fs(KERNEL_DS); | |
6b96018b | 2470 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 AB |
2471 | set_fs(old_fs); |
2472 | if (!err) { | |
2473 | err = put_user(kts.tv_sec, &up->tv_sec); | |
2474 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); | |
2475 | } | |
2476 | return err; | |
2477 | } | |
2478 | ||
6b96018b | 2479 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2480 | { |
2481 | struct ifreq __user *uifr; | |
2482 | int err; | |
2483 | ||
2484 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2485 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2486 | return -EFAULT; |
2487 | ||
6b96018b | 2488 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2489 | if (err) |
2490 | return err; | |
2491 | ||
6b96018b | 2492 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2493 | return -EFAULT; |
2494 | ||
2495 | return 0; | |
2496 | } | |
2497 | ||
6b96018b | 2498 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2499 | { |
6b96018b | 2500 | struct compat_ifconf ifc32; |
7a229387 AB |
2501 | struct ifconf ifc; |
2502 | struct ifconf __user *uifc; | |
6b96018b | 2503 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2504 | struct ifreq __user *ifr; |
2505 | unsigned int i, j; | |
2506 | int err; | |
2507 | ||
6b96018b | 2508 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2509 | return -EFAULT; |
2510 | ||
2511 | if (ifc32.ifcbuf == 0) { | |
2512 | ifc32.ifc_len = 0; | |
2513 | ifc.ifc_len = 0; | |
2514 | ifc.ifc_req = NULL; | |
2515 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2516 | } else { | |
c6d409cf ED |
2517 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2518 | sizeof(struct ifreq); | |
7a229387 AB |
2519 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2520 | ifc.ifc_len = len; | |
2521 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2522 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2523 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2524 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2525 | return -EFAULT; |
2526 | ifr++; | |
2527 | ifr32++; | |
2528 | } | |
2529 | } | |
2530 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2531 | return -EFAULT; | |
2532 | ||
6b96018b | 2533 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2534 | if (err) |
2535 | return err; | |
2536 | ||
2537 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2538 | return -EFAULT; | |
2539 | ||
2540 | ifr = ifc.ifc_req; | |
2541 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2542 | for (i = 0, j = 0; | |
c6d409cf ED |
2543 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2544 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2545 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2546 | return -EFAULT; |
2547 | ifr32++; | |
2548 | ifr++; | |
2549 | } | |
2550 | ||
2551 | if (ifc32.ifcbuf == 0) { | |
2552 | /* Translate from 64-bit structure multiple to | |
2553 | * a 32-bit one. | |
2554 | */ | |
2555 | i = ifc.ifc_len; | |
6b96018b | 2556 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2557 | ifc32.ifc_len = i; |
2558 | } else { | |
2559 | ifc32.ifc_len = i; | |
2560 | } | |
6b96018b | 2561 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2562 | return -EFAULT; |
2563 | ||
2564 | return 0; | |
2565 | } | |
2566 | ||
6b96018b | 2567 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 AB |
2568 | { |
2569 | struct ifreq __user *ifr; | |
7a229387 AB |
2570 | u32 data; |
2571 | void __user *datap; | |
2572 | ||
2573 | ifr = compat_alloc_user_space(sizeof(*ifr)); | |
7a229387 AB |
2574 | |
2575 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2576 | return -EFAULT; | |
2577 | ||
2578 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2579 | return -EFAULT; | |
2580 | ||
2581 | datap = compat_ptr(data); | |
2582 | if (put_user(datap, &ifr->ifr_ifru.ifru_data)) | |
2583 | return -EFAULT; | |
2584 | ||
6b96018b | 2585 | return dev_ioctl(net, SIOCETHTOOL, ifr); |
7a229387 AB |
2586 | } |
2587 | ||
7a50a240 AB |
2588 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2589 | { | |
2590 | void __user *uptr; | |
2591 | compat_uptr_t uptr32; | |
2592 | struct ifreq __user *uifr; | |
2593 | ||
c6d409cf | 2594 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2595 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2596 | return -EFAULT; | |
2597 | ||
2598 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2599 | return -EFAULT; | |
2600 | ||
2601 | uptr = compat_ptr(uptr32); | |
2602 | ||
2603 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2604 | return -EFAULT; | |
2605 | ||
2606 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2607 | } | |
2608 | ||
6b96018b AB |
2609 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2610 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2611 | { |
2612 | struct ifreq kifr; | |
2613 | struct ifreq __user *uifr; | |
7a229387 AB |
2614 | mm_segment_t old_fs; |
2615 | int err; | |
2616 | u32 data; | |
2617 | void __user *datap; | |
2618 | ||
2619 | switch (cmd) { | |
2620 | case SIOCBONDENSLAVE: | |
2621 | case SIOCBONDRELEASE: | |
2622 | case SIOCBONDSETHWADDR: | |
2623 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2624 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2625 | return -EFAULT; |
2626 | ||
2627 | old_fs = get_fs(); | |
c6d409cf | 2628 | set_fs(KERNEL_DS); |
6b96018b | 2629 | err = dev_ioctl(net, cmd, &kifr); |
c6d409cf | 2630 | set_fs(old_fs); |
7a229387 AB |
2631 | |
2632 | return err; | |
2633 | case SIOCBONDSLAVEINFOQUERY: | |
2634 | case SIOCBONDINFOQUERY: | |
2635 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2636 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2637 | return -EFAULT; | |
2638 | ||
2639 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2640 | return -EFAULT; | |
2641 | ||
2642 | datap = compat_ptr(data); | |
2643 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2644 | return -EFAULT; | |
2645 | ||
6b96018b | 2646 | return dev_ioctl(net, cmd, uifr); |
7a229387 AB |
2647 | default: |
2648 | return -EINVAL; | |
ccbd6a5a | 2649 | } |
7a229387 AB |
2650 | } |
2651 | ||
6b96018b AB |
2652 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2653 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2654 | { |
2655 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2656 | char tmp_buf[IFNAMSIZ]; |
2657 | void __user *data64; | |
2658 | u32 data32; | |
2659 | ||
2660 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2661 | IFNAMSIZ)) | |
2662 | return -EFAULT; | |
2663 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2664 | return -EFAULT; | |
2665 | data64 = compat_ptr(data32); | |
2666 | ||
2667 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2668 | ||
2669 | /* Don't check these user accesses, just let that get trapped | |
2670 | * in the ioctl handler instead. | |
2671 | */ | |
2672 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2673 | IFNAMSIZ)) | |
2674 | return -EFAULT; | |
2675 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2676 | return -EFAULT; | |
2677 | ||
6b96018b | 2678 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2679 | } |
2680 | ||
6b96018b AB |
2681 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2682 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2683 | { |
a2116ed2 | 2684 | struct ifreq __user *uifr; |
7a229387 AB |
2685 | int err; |
2686 | ||
a2116ed2 AB |
2687 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2688 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2689 | return -EFAULT; | |
2690 | ||
2691 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2692 | ||
7a229387 AB |
2693 | if (!err) { |
2694 | switch (cmd) { | |
2695 | case SIOCGIFFLAGS: | |
2696 | case SIOCGIFMETRIC: | |
2697 | case SIOCGIFMTU: | |
2698 | case SIOCGIFMEM: | |
2699 | case SIOCGIFHWADDR: | |
2700 | case SIOCGIFINDEX: | |
2701 | case SIOCGIFADDR: | |
2702 | case SIOCGIFBRDADDR: | |
2703 | case SIOCGIFDSTADDR: | |
2704 | case SIOCGIFNETMASK: | |
fab2532b | 2705 | case SIOCGIFPFLAGS: |
7a229387 | 2706 | case SIOCGIFTXQLEN: |
fab2532b AB |
2707 | case SIOCGMIIPHY: |
2708 | case SIOCGMIIREG: | |
a2116ed2 | 2709 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2710 | err = -EFAULT; |
2711 | break; | |
2712 | } | |
2713 | } | |
2714 | return err; | |
2715 | } | |
2716 | ||
a2116ed2 AB |
2717 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2718 | struct compat_ifreq __user *uifr32) | |
2719 | { | |
2720 | struct ifreq ifr; | |
2721 | struct compat_ifmap __user *uifmap32; | |
2722 | mm_segment_t old_fs; | |
2723 | int err; | |
2724 | ||
2725 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2726 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
2727 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2728 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2729 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2730 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2731 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2732 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
2733 | if (err) | |
2734 | return -EFAULT; | |
2735 | ||
2736 | old_fs = get_fs(); | |
c6d409cf | 2737 | set_fs(KERNEL_DS); |
a2116ed2 | 2738 | err = dev_ioctl(net, cmd, (void __user *)&ifr); |
c6d409cf | 2739 | set_fs(old_fs); |
a2116ed2 AB |
2740 | |
2741 | if (cmd == SIOCGIFMAP && !err) { | |
2742 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
2743 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2744 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2745 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2746 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2747 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2748 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
2749 | if (err) | |
2750 | err = -EFAULT; | |
2751 | } | |
2752 | return err; | |
2753 | } | |
2754 | ||
2755 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
2756 | { | |
2757 | void __user *uptr; | |
2758 | compat_uptr_t uptr32; | |
2759 | struct ifreq __user *uifr; | |
2760 | ||
c6d409cf | 2761 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
a2116ed2 AB |
2762 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2763 | return -EFAULT; | |
2764 | ||
2765 | if (get_user(uptr32, &uifr32->ifr_data)) | |
2766 | return -EFAULT; | |
2767 | ||
2768 | uptr = compat_ptr(uptr32); | |
2769 | ||
2770 | if (put_user(uptr, &uifr->ifr_data)) | |
2771 | return -EFAULT; | |
2772 | ||
2773 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
2774 | } | |
2775 | ||
7a229387 | 2776 | struct rtentry32 { |
c6d409cf | 2777 | u32 rt_pad1; |
7a229387 AB |
2778 | struct sockaddr rt_dst; /* target address */ |
2779 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
2780 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
2781 | unsigned short rt_flags; |
2782 | short rt_pad2; | |
2783 | u32 rt_pad3; | |
2784 | unsigned char rt_tos; | |
2785 | unsigned char rt_class; | |
2786 | short rt_pad4; | |
2787 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 2788 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
2789 | u32 rt_mtu; /* per route MTU/Window */ |
2790 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
2791 | unsigned short rt_irtt; /* Initial RTT */ |
2792 | }; | |
2793 | ||
2794 | struct in6_rtmsg32 { | |
2795 | struct in6_addr rtmsg_dst; | |
2796 | struct in6_addr rtmsg_src; | |
2797 | struct in6_addr rtmsg_gateway; | |
2798 | u32 rtmsg_type; | |
2799 | u16 rtmsg_dst_len; | |
2800 | u16 rtmsg_src_len; | |
2801 | u32 rtmsg_metric; | |
2802 | u32 rtmsg_info; | |
2803 | u32 rtmsg_flags; | |
2804 | s32 rtmsg_ifindex; | |
2805 | }; | |
2806 | ||
6b96018b AB |
2807 | static int routing_ioctl(struct net *net, struct socket *sock, |
2808 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
2809 | { |
2810 | int ret; | |
2811 | void *r = NULL; | |
2812 | struct in6_rtmsg r6; | |
2813 | struct rtentry r4; | |
2814 | char devname[16]; | |
2815 | u32 rtdev; | |
2816 | mm_segment_t old_fs = get_fs(); | |
2817 | ||
6b96018b AB |
2818 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
2819 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 2820 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 2821 | 3 * sizeof(struct in6_addr)); |
c6d409cf ED |
2822 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
2823 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
2824 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
2825 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
2826 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
2827 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
2828 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
2829 | |
2830 | r = (void *) &r6; | |
2831 | } else { /* ipv4 */ | |
6b96018b | 2832 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 2833 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 2834 | 3 * sizeof(struct sockaddr)); |
c6d409cf ED |
2835 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
2836 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
2837 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
2838 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
2839 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
2840 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 2841 | if (rtdev) { |
c6d409cf | 2842 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
7a229387 AB |
2843 | r4.rt_dev = devname; devname[15] = 0; |
2844 | } else | |
2845 | r4.rt_dev = NULL; | |
2846 | ||
2847 | r = (void *) &r4; | |
2848 | } | |
2849 | ||
2850 | if (ret) { | |
2851 | ret = -EFAULT; | |
2852 | goto out; | |
2853 | } | |
2854 | ||
c6d409cf | 2855 | set_fs(KERNEL_DS); |
6b96018b | 2856 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 2857 | set_fs(old_fs); |
7a229387 AB |
2858 | |
2859 | out: | |
7a229387 AB |
2860 | return ret; |
2861 | } | |
2862 | ||
2863 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
2864 | * for some operations; this forces use of the newer bridge-utils that | |
2865 | * use compatiable ioctls | |
2866 | */ | |
6b96018b | 2867 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 2868 | { |
6b96018b | 2869 | compat_ulong_t tmp; |
7a229387 | 2870 | |
6b96018b | 2871 | if (get_user(tmp, argp)) |
7a229387 AB |
2872 | return -EFAULT; |
2873 | if (tmp == BRCTL_GET_VERSION) | |
2874 | return BRCTL_VERSION + 1; | |
2875 | return -EINVAL; | |
2876 | } | |
2877 | ||
6b96018b AB |
2878 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
2879 | unsigned int cmd, unsigned long arg) | |
2880 | { | |
2881 | void __user *argp = compat_ptr(arg); | |
2882 | struct sock *sk = sock->sk; | |
2883 | struct net *net = sock_net(sk); | |
7a229387 | 2884 | |
6b96018b AB |
2885 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
2886 | return siocdevprivate_ioctl(net, cmd, argp); | |
2887 | ||
2888 | switch (cmd) { | |
2889 | case SIOCSIFBR: | |
2890 | case SIOCGIFBR: | |
2891 | return old_bridge_ioctl(argp); | |
2892 | case SIOCGIFNAME: | |
2893 | return dev_ifname32(net, argp); | |
2894 | case SIOCGIFCONF: | |
2895 | return dev_ifconf(net, argp); | |
2896 | case SIOCETHTOOL: | |
2897 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
2898 | case SIOCWANDEV: |
2899 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
2900 | case SIOCGIFMAP: |
2901 | case SIOCSIFMAP: | |
2902 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
2903 | case SIOCBONDENSLAVE: |
2904 | case SIOCBONDRELEASE: | |
2905 | case SIOCBONDSETHWADDR: | |
2906 | case SIOCBONDSLAVEINFOQUERY: | |
2907 | case SIOCBONDINFOQUERY: | |
2908 | case SIOCBONDCHANGEACTIVE: | |
2909 | return bond_ioctl(net, cmd, argp); | |
2910 | case SIOCADDRT: | |
2911 | case SIOCDELRT: | |
2912 | return routing_ioctl(net, sock, cmd, argp); | |
2913 | case SIOCGSTAMP: | |
2914 | return do_siocgstamp(net, sock, cmd, argp); | |
2915 | case SIOCGSTAMPNS: | |
2916 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
2917 | case SIOCSHWTSTAMP: |
2918 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
2919 | |
2920 | case FIOSETOWN: | |
2921 | case SIOCSPGRP: | |
2922 | case FIOGETOWN: | |
2923 | case SIOCGPGRP: | |
2924 | case SIOCBRADDBR: | |
2925 | case SIOCBRDELBR: | |
2926 | case SIOCGIFVLAN: | |
2927 | case SIOCSIFVLAN: | |
2928 | case SIOCADDDLCI: | |
2929 | case SIOCDELDLCI: | |
2930 | return sock_ioctl(file, cmd, arg); | |
2931 | ||
2932 | case SIOCGIFFLAGS: | |
2933 | case SIOCSIFFLAGS: | |
2934 | case SIOCGIFMETRIC: | |
2935 | case SIOCSIFMETRIC: | |
2936 | case SIOCGIFMTU: | |
2937 | case SIOCSIFMTU: | |
2938 | case SIOCGIFMEM: | |
2939 | case SIOCSIFMEM: | |
2940 | case SIOCGIFHWADDR: | |
2941 | case SIOCSIFHWADDR: | |
2942 | case SIOCADDMULTI: | |
2943 | case SIOCDELMULTI: | |
2944 | case SIOCGIFINDEX: | |
6b96018b AB |
2945 | case SIOCGIFADDR: |
2946 | case SIOCSIFADDR: | |
2947 | case SIOCSIFHWBROADCAST: | |
6b96018b | 2948 | case SIOCDIFADDR: |
6b96018b AB |
2949 | case SIOCGIFBRDADDR: |
2950 | case SIOCSIFBRDADDR: | |
2951 | case SIOCGIFDSTADDR: | |
2952 | case SIOCSIFDSTADDR: | |
2953 | case SIOCGIFNETMASK: | |
2954 | case SIOCSIFNETMASK: | |
2955 | case SIOCSIFPFLAGS: | |
2956 | case SIOCGIFPFLAGS: | |
2957 | case SIOCGIFTXQLEN: | |
2958 | case SIOCSIFTXQLEN: | |
2959 | case SIOCBRADDIF: | |
2960 | case SIOCBRDELIF: | |
9177efd3 AB |
2961 | case SIOCSIFNAME: |
2962 | case SIOCGMIIPHY: | |
2963 | case SIOCGMIIREG: | |
2964 | case SIOCSMIIREG: | |
6b96018b | 2965 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 2966 | |
6b96018b AB |
2967 | case SIOCSARP: |
2968 | case SIOCGARP: | |
2969 | case SIOCDARP: | |
6b96018b | 2970 | case SIOCATMARK: |
9177efd3 AB |
2971 | return sock_do_ioctl(net, sock, cmd, arg); |
2972 | } | |
2973 | ||
2974 | /* Prevent warning from compat_sys_ioctl, these always | |
2975 | * result in -EINVAL in the native case anyway. */ | |
2976 | switch (cmd) { | |
2977 | case SIOCRTMSG: | |
2978 | case SIOCGIFCOUNT: | |
6b96018b AB |
2979 | case SIOCSRARP: |
2980 | case SIOCGRARP: | |
2981 | case SIOCDRARP: | |
9177efd3 AB |
2982 | case SIOCSIFLINK: |
2983 | case SIOCGIFSLAVE: | |
2984 | case SIOCSIFSLAVE: | |
2985 | return -EINVAL; | |
6b96018b AB |
2986 | } |
2987 | ||
2988 | return -ENOIOCTLCMD; | |
2989 | } | |
7a229387 | 2990 | |
89bbfc95 | 2991 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
89bddce5 | 2992 | unsigned long arg) |
89bbfc95 SP |
2993 | { |
2994 | struct socket *sock = file->private_data; | |
2995 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
2996 | struct sock *sk; |
2997 | struct net *net; | |
2998 | ||
2999 | sk = sock->sk; | |
3000 | net = sock_net(sk); | |
89bbfc95 SP |
3001 | |
3002 | if (sock->ops->compat_ioctl) | |
3003 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3004 | ||
87de87d5 DM |
3005 | if (ret == -ENOIOCTLCMD && |
3006 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3007 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3008 | ||
6b96018b AB |
3009 | if (ret == -ENOIOCTLCMD) |
3010 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3011 | ||
89bbfc95 SP |
3012 | return ret; |
3013 | } | |
3014 | #endif | |
3015 | ||
ac5a488e SS |
3016 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3017 | { | |
3018 | return sock->ops->bind(sock, addr, addrlen); | |
3019 | } | |
c6d409cf | 3020 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3021 | |
3022 | int kernel_listen(struct socket *sock, int backlog) | |
3023 | { | |
3024 | return sock->ops->listen(sock, backlog); | |
3025 | } | |
c6d409cf | 3026 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3027 | |
3028 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3029 | { | |
3030 | struct sock *sk = sock->sk; | |
3031 | int err; | |
3032 | ||
3033 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3034 | newsock); | |
3035 | if (err < 0) | |
3036 | goto done; | |
3037 | ||
3038 | err = sock->ops->accept(sock, *newsock, flags); | |
3039 | if (err < 0) { | |
3040 | sock_release(*newsock); | |
fa8705b0 | 3041 | *newsock = NULL; |
ac5a488e SS |
3042 | goto done; |
3043 | } | |
3044 | ||
3045 | (*newsock)->ops = sock->ops; | |
1b08534e | 3046 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3047 | |
3048 | done: | |
3049 | return err; | |
3050 | } | |
c6d409cf | 3051 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3052 | |
3053 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3054 | int flags) |
ac5a488e SS |
3055 | { |
3056 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3057 | } | |
c6d409cf | 3058 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3059 | |
3060 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3061 | int *addrlen) | |
3062 | { | |
3063 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3064 | } | |
c6d409cf | 3065 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3066 | |
3067 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3068 | int *addrlen) | |
3069 | { | |
3070 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3071 | } | |
c6d409cf | 3072 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3073 | |
3074 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3075 | char *optval, int *optlen) | |
3076 | { | |
3077 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3078 | char __user *uoptval; |
3079 | int __user *uoptlen; | |
ac5a488e SS |
3080 | int err; |
3081 | ||
fb8621bb NK |
3082 | uoptval = (char __user __force *) optval; |
3083 | uoptlen = (int __user __force *) optlen; | |
3084 | ||
ac5a488e SS |
3085 | set_fs(KERNEL_DS); |
3086 | if (level == SOL_SOCKET) | |
fb8621bb | 3087 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3088 | else |
fb8621bb NK |
3089 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3090 | uoptlen); | |
ac5a488e SS |
3091 | set_fs(oldfs); |
3092 | return err; | |
3093 | } | |
c6d409cf | 3094 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3095 | |
3096 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3097 | char *optval, unsigned int optlen) |
ac5a488e SS |
3098 | { |
3099 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3100 | char __user *uoptval; |
ac5a488e SS |
3101 | int err; |
3102 | ||
fb8621bb NK |
3103 | uoptval = (char __user __force *) optval; |
3104 | ||
ac5a488e SS |
3105 | set_fs(KERNEL_DS); |
3106 | if (level == SOL_SOCKET) | |
fb8621bb | 3107 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3108 | else |
fb8621bb | 3109 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3110 | optlen); |
3111 | set_fs(oldfs); | |
3112 | return err; | |
3113 | } | |
c6d409cf | 3114 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3115 | |
3116 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3117 | size_t size, int flags) | |
3118 | { | |
f8451725 HX |
3119 | sock_update_classid(sock->sk); |
3120 | ||
ac5a488e SS |
3121 | if (sock->ops->sendpage) |
3122 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3123 | ||
3124 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3125 | } | |
c6d409cf | 3126 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3127 | |
3128 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3129 | { | |
3130 | mm_segment_t oldfs = get_fs(); | |
3131 | int err; | |
3132 | ||
3133 | set_fs(KERNEL_DS); | |
3134 | err = sock->ops->ioctl(sock, cmd, arg); | |
3135 | set_fs(oldfs); | |
3136 | ||
3137 | return err; | |
3138 | } | |
c6d409cf | 3139 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3140 | |
91cf45f0 TM |
3141 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3142 | { | |
3143 | return sock->ops->shutdown(sock, how); | |
3144 | } | |
91cf45f0 | 3145 | EXPORT_SYMBOL(kernel_sock_shutdown); |