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); |
190683a9 | 159 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 160 | |
1da177e4 LT |
161 | /* |
162 | * Statistics counters of the socket lists | |
163 | */ | |
164 | ||
c6d409cf | 165 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
166 | |
167 | /* | |
89bddce5 SH |
168 | * Support routines. |
169 | * Move socket addresses back and forth across the kernel/user | |
170 | * divide and look after the messy bits. | |
1da177e4 LT |
171 | */ |
172 | ||
1da177e4 LT |
173 | /** |
174 | * move_addr_to_kernel - copy a socket address into kernel space | |
175 | * @uaddr: Address in user space | |
176 | * @kaddr: Address in kernel space | |
177 | * @ulen: Length in user space | |
178 | * | |
179 | * The address is copied into kernel space. If the provided address is | |
180 | * too long an error code of -EINVAL is returned. If the copy gives | |
181 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
182 | */ | |
183 | ||
43db362d | 184 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 185 | { |
230b1839 | 186 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 187 | return -EINVAL; |
89bddce5 | 188 | if (ulen == 0) |
1da177e4 | 189 | return 0; |
89bddce5 | 190 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 191 | return -EFAULT; |
3ec3b2fb | 192 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
193 | } |
194 | ||
195 | /** | |
196 | * move_addr_to_user - copy an address to user space | |
197 | * @kaddr: kernel space address | |
198 | * @klen: length of address in kernel | |
199 | * @uaddr: user space address | |
200 | * @ulen: pointer to user length field | |
201 | * | |
202 | * The value pointed to by ulen on entry is the buffer length available. | |
203 | * This is overwritten with the buffer space used. -EINVAL is returned | |
204 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
205 | * is returned if either the buffer or the length field are not | |
206 | * accessible. | |
207 | * After copying the data up to the limit the user specifies, the true | |
208 | * length of the data is written over the length limit the user | |
209 | * specified. Zero is returned for a success. | |
210 | */ | |
89bddce5 | 211 | |
43db362d | 212 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 213 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
214 | { |
215 | int err; | |
216 | int len; | |
217 | ||
89bddce5 SH |
218 | err = get_user(len, ulen); |
219 | if (err) | |
1da177e4 | 220 | return err; |
89bddce5 SH |
221 | if (len > klen) |
222 | len = klen; | |
230b1839 | 223 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 224 | return -EINVAL; |
89bddce5 | 225 | if (len) { |
d6fe3945 SG |
226 | if (audit_sockaddr(klen, kaddr)) |
227 | return -ENOMEM; | |
89bddce5 | 228 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
229 | return -EFAULT; |
230 | } | |
231 | /* | |
89bddce5 SH |
232 | * "fromlen shall refer to the value before truncation.." |
233 | * 1003.1g | |
1da177e4 LT |
234 | */ |
235 | return __put_user(klen, ulen); | |
236 | } | |
237 | ||
e18b890b | 238 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
239 | |
240 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
241 | { | |
242 | struct socket_alloc *ei; | |
eaefd110 | 243 | struct socket_wq *wq; |
89bddce5 | 244 | |
e94b1766 | 245 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
246 | if (!ei) |
247 | return NULL; | |
eaefd110 ED |
248 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
249 | if (!wq) { | |
43815482 ED |
250 | kmem_cache_free(sock_inode_cachep, ei); |
251 | return NULL; | |
252 | } | |
eaefd110 ED |
253 | init_waitqueue_head(&wq->wait); |
254 | wq->fasync_list = NULL; | |
255 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 256 | |
1da177e4 LT |
257 | ei->socket.state = SS_UNCONNECTED; |
258 | ei->socket.flags = 0; | |
259 | ei->socket.ops = NULL; | |
260 | ei->socket.sk = NULL; | |
261 | ei->socket.file = NULL; | |
1da177e4 LT |
262 | |
263 | return &ei->vfs_inode; | |
264 | } | |
265 | ||
266 | static void sock_destroy_inode(struct inode *inode) | |
267 | { | |
43815482 | 268 | struct socket_alloc *ei; |
eaefd110 | 269 | struct socket_wq *wq; |
43815482 ED |
270 | |
271 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 272 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 273 | kfree_rcu(wq, rcu); |
43815482 | 274 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
275 | } |
276 | ||
51cc5068 | 277 | static void init_once(void *foo) |
1da177e4 | 278 | { |
89bddce5 | 279 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 280 | |
a35afb83 | 281 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 282 | } |
89bddce5 | 283 | |
1da177e4 LT |
284 | static int init_inodecache(void) |
285 | { | |
286 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
287 | sizeof(struct socket_alloc), |
288 | 0, | |
289 | (SLAB_HWCACHE_ALIGN | | |
290 | SLAB_RECLAIM_ACCOUNT | | |
291 | SLAB_MEM_SPREAD), | |
20c2df83 | 292 | init_once); |
1da177e4 LT |
293 | if (sock_inode_cachep == NULL) |
294 | return -ENOMEM; | |
295 | return 0; | |
296 | } | |
297 | ||
b87221de | 298 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
299 | .alloc_inode = sock_alloc_inode, |
300 | .destroy_inode = sock_destroy_inode, | |
301 | .statfs = simple_statfs, | |
1da177e4 LT |
302 | }; |
303 | ||
c23fbb6b ED |
304 | /* |
305 | * sockfs_dname() is called from d_path(). | |
306 | */ | |
307 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
308 | { | |
309 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
310 | dentry->d_inode->i_ino); | |
311 | } | |
312 | ||
3ba13d17 | 313 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 314 | .d_dname = sockfs_dname, |
1da177e4 LT |
315 | }; |
316 | ||
c74a1cbb AV |
317 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
318 | int flags, const char *dev_name, void *data) | |
319 | { | |
320 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
321 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
322 | } | |
323 | ||
324 | static struct vfsmount *sock_mnt __read_mostly; | |
325 | ||
326 | static struct file_system_type sock_fs_type = { | |
327 | .name = "sockfs", | |
328 | .mount = sockfs_mount, | |
329 | .kill_sb = kill_anon_super, | |
330 | }; | |
331 | ||
1da177e4 LT |
332 | /* |
333 | * Obtains the first available file descriptor and sets it up for use. | |
334 | * | |
39d8c1b6 DM |
335 | * These functions create file structures and maps them to fd space |
336 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
337 | * and file struct implicitly stored in sock->file. |
338 | * Note that another thread may close file descriptor before we return | |
339 | * from this function. We use the fact that now we do not refer | |
340 | * to socket after mapping. If one day we will need it, this | |
341 | * function will increment ref. count on file by 1. | |
342 | * | |
343 | * In any case returned fd MAY BE not valid! | |
344 | * This race condition is unavoidable | |
345 | * with shared fd spaces, we cannot solve it inside kernel, | |
346 | * but we take care of internal coherence yet. | |
347 | */ | |
348 | ||
28407630 | 349 | static struct file *sock_alloc_file(struct socket *sock, int flags) |
1da177e4 | 350 | { |
7cbe66b6 | 351 | struct qstr name = { .name = "" }; |
2c48b9c4 | 352 | struct path path; |
7cbe66b6 | 353 | struct file *file; |
1da177e4 | 354 | |
4b936885 | 355 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
356 | if (unlikely(!path.dentry)) |
357 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 358 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 359 | |
2c48b9c4 | 360 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 361 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 362 | |
2c48b9c4 | 363 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 364 | &socket_file_ops); |
cc3808f8 AV |
365 | if (unlikely(!file)) { |
366 | /* drop dentry, keep inode */ | |
7de9c6ee | 367 | ihold(path.dentry->d_inode); |
2c48b9c4 | 368 | path_put(&path); |
28407630 | 369 | return ERR_PTR(-ENFILE); |
cc3808f8 AV |
370 | } |
371 | ||
372 | sock->file = file; | |
77d27200 | 373 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
374 | file->f_pos = 0; |
375 | file->private_data = sock; | |
28407630 | 376 | return file; |
39d8c1b6 DM |
377 | } |
378 | ||
a677a039 | 379 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
380 | { |
381 | struct file *newfile; | |
28407630 AV |
382 | int fd = get_unused_fd_flags(flags); |
383 | if (unlikely(fd < 0)) | |
384 | return fd; | |
39d8c1b6 | 385 | |
28407630 AV |
386 | newfile = sock_alloc_file(sock, flags); |
387 | if (likely(!IS_ERR(newfile))) { | |
39d8c1b6 | 388 | fd_install(fd, newfile); |
28407630 AV |
389 | return fd; |
390 | } | |
7cbe66b6 | 391 | |
28407630 AV |
392 | put_unused_fd(fd); |
393 | return PTR_ERR(newfile); | |
1da177e4 | 394 | } |
c6d409cf | 395 | EXPORT_SYMBOL(sock_map_fd); |
1da177e4 | 396 | |
406a3c63 | 397 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 398 | { |
6cb153ca BL |
399 | if (file->f_op == &socket_file_ops) |
400 | return file->private_data; /* set in sock_map_fd */ | |
401 | ||
23bb80d2 ED |
402 | *err = -ENOTSOCK; |
403 | return NULL; | |
6cb153ca | 404 | } |
406a3c63 | 405 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 406 | |
1da177e4 | 407 | /** |
c6d409cf | 408 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
409 | * @fd: file handle |
410 | * @err: pointer to an error code return | |
411 | * | |
412 | * The file handle passed in is locked and the socket it is bound | |
413 | * too is returned. If an error occurs the err pointer is overwritten | |
414 | * with a negative errno code and NULL is returned. The function checks | |
415 | * for both invalid handles and passing a handle which is not a socket. | |
416 | * | |
417 | * On a success the socket object pointer is returned. | |
418 | */ | |
419 | ||
420 | struct socket *sockfd_lookup(int fd, int *err) | |
421 | { | |
422 | struct file *file; | |
1da177e4 LT |
423 | struct socket *sock; |
424 | ||
89bddce5 SH |
425 | file = fget(fd); |
426 | if (!file) { | |
1da177e4 LT |
427 | *err = -EBADF; |
428 | return NULL; | |
429 | } | |
89bddce5 | 430 | |
6cb153ca BL |
431 | sock = sock_from_file(file, err); |
432 | if (!sock) | |
1da177e4 | 433 | fput(file); |
6cb153ca BL |
434 | return sock; |
435 | } | |
c6d409cf | 436 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 437 | |
6cb153ca BL |
438 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
439 | { | |
440 | struct file *file; | |
441 | struct socket *sock; | |
442 | ||
3672558c | 443 | *err = -EBADF; |
6cb153ca BL |
444 | file = fget_light(fd, fput_needed); |
445 | if (file) { | |
446 | sock = sock_from_file(file, err); | |
447 | if (sock) | |
448 | return sock; | |
449 | fput_light(file, *fput_needed); | |
1da177e4 | 450 | } |
6cb153ca | 451 | return NULL; |
1da177e4 LT |
452 | } |
453 | ||
454 | /** | |
455 | * sock_alloc - allocate a socket | |
89bddce5 | 456 | * |
1da177e4 LT |
457 | * Allocate a new inode and socket object. The two are bound together |
458 | * and initialised. The socket is then returned. If we are out of inodes | |
459 | * NULL is returned. | |
460 | */ | |
461 | ||
462 | static struct socket *sock_alloc(void) | |
463 | { | |
89bddce5 SH |
464 | struct inode *inode; |
465 | struct socket *sock; | |
1da177e4 | 466 | |
a209dfc7 | 467 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
468 | if (!inode) |
469 | return NULL; | |
470 | ||
471 | sock = SOCKET_I(inode); | |
472 | ||
29a020d3 | 473 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 474 | inode->i_ino = get_next_ino(); |
89bddce5 | 475 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
476 | inode->i_uid = current_fsuid(); |
477 | inode->i_gid = current_fsgid(); | |
1da177e4 | 478 | |
19e8d69c | 479 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
480 | return sock; |
481 | } | |
482 | ||
483 | /* | |
484 | * In theory you can't get an open on this inode, but /proc provides | |
485 | * a back door. Remember to keep it shut otherwise you'll let the | |
486 | * creepy crawlies in. | |
487 | */ | |
89bddce5 | 488 | |
1da177e4 LT |
489 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
490 | { | |
491 | return -ENXIO; | |
492 | } | |
493 | ||
4b6f5d20 | 494 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
495 | .owner = THIS_MODULE, |
496 | .open = sock_no_open, | |
6038f373 | 497 | .llseek = noop_llseek, |
1da177e4 LT |
498 | }; |
499 | ||
500 | /** | |
501 | * sock_release - close a socket | |
502 | * @sock: socket to close | |
503 | * | |
504 | * The socket is released from the protocol stack if it has a release | |
505 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 506 | * an inode not a file. |
1da177e4 | 507 | */ |
89bddce5 | 508 | |
1da177e4 LT |
509 | void sock_release(struct socket *sock) |
510 | { | |
511 | if (sock->ops) { | |
512 | struct module *owner = sock->ops->owner; | |
513 | ||
514 | sock->ops->release(sock); | |
515 | sock->ops = NULL; | |
516 | module_put(owner); | |
517 | } | |
518 | ||
eaefd110 | 519 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
1da177e4 LT |
520 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
521 | ||
b09e786b MP |
522 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
523 | return; | |
524 | ||
19e8d69c | 525 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
526 | if (!sock->file) { |
527 | iput(SOCK_INODE(sock)); | |
528 | return; | |
529 | } | |
89bddce5 | 530 | sock->file = NULL; |
1da177e4 | 531 | } |
c6d409cf | 532 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 533 | |
2244d07b | 534 | int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 535 | { |
2244d07b | 536 | *tx_flags = 0; |
20d49473 | 537 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 538 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 539 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 540 | *tx_flags |= SKBTX_SW_TSTAMP; |
6e3e939f JB |
541 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
542 | *tx_flags |= SKBTX_WIFI_STATUS; | |
20d49473 PO |
543 | return 0; |
544 | } | |
545 | EXPORT_SYMBOL(sock_tx_timestamp); | |
546 | ||
228e548e AB |
547 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
548 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
549 | { |
550 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 | 551 | |
f8451725 HX |
552 | sock_update_classid(sock->sk); |
553 | ||
1da177e4 LT |
554 | si->sock = sock; |
555 | si->scm = NULL; | |
556 | si->msg = msg; | |
557 | si->size = size; | |
558 | ||
1da177e4 LT |
559 | return sock->ops->sendmsg(iocb, sock, msg, size); |
560 | } | |
561 | ||
228e548e AB |
562 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
563 | struct msghdr *msg, size_t size) | |
564 | { | |
565 | int err = security_socket_sendmsg(sock, msg, size); | |
566 | ||
567 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
568 | } | |
569 | ||
1da177e4 LT |
570 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
571 | { | |
572 | struct kiocb iocb; | |
573 | struct sock_iocb siocb; | |
574 | int ret; | |
575 | ||
576 | init_sync_kiocb(&iocb, NULL); | |
577 | iocb.private = &siocb; | |
578 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
579 | if (-EIOCBQUEUED == ret) | |
580 | ret = wait_on_sync_kiocb(&iocb); | |
581 | return ret; | |
582 | } | |
c6d409cf | 583 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 584 | |
894dc24c | 585 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
586 | { |
587 | struct kiocb iocb; | |
588 | struct sock_iocb siocb; | |
589 | int ret; | |
590 | ||
591 | init_sync_kiocb(&iocb, NULL); | |
592 | iocb.private = &siocb; | |
593 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
594 | if (-EIOCBQUEUED == ret) | |
595 | ret = wait_on_sync_kiocb(&iocb); | |
596 | return ret; | |
597 | } | |
598 | ||
1da177e4 LT |
599 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
600 | struct kvec *vec, size_t num, size_t size) | |
601 | { | |
602 | mm_segment_t oldfs = get_fs(); | |
603 | int result; | |
604 | ||
605 | set_fs(KERNEL_DS); | |
606 | /* | |
607 | * the following is safe, since for compiler definitions of kvec and | |
608 | * iovec are identical, yielding the same in-core layout and alignment | |
609 | */ | |
89bddce5 | 610 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
611 | msg->msg_iovlen = num; |
612 | result = sock_sendmsg(sock, msg, size); | |
613 | set_fs(oldfs); | |
614 | return result; | |
615 | } | |
c6d409cf | 616 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 617 | |
20d49473 PO |
618 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
619 | { | |
620 | if (kt.tv64) { | |
621 | *ts = ktime_to_timespec(kt); | |
622 | return 1; | |
623 | } else { | |
624 | return 0; | |
625 | } | |
626 | } | |
627 | ||
92f37fd2 ED |
628 | /* |
629 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
630 | */ | |
631 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
632 | struct sk_buff *skb) | |
633 | { | |
20d49473 PO |
634 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
635 | struct timespec ts[3]; | |
636 | int empty = 1; | |
637 | struct skb_shared_hwtstamps *shhwtstamps = | |
638 | skb_hwtstamps(skb); | |
639 | ||
640 | /* Race occurred between timestamp enabling and packet | |
641 | receiving. Fill in the current time for now. */ | |
642 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
643 | __net_timestamp(skb); | |
644 | ||
645 | if (need_software_tstamp) { | |
646 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
647 | struct timeval tv; | |
648 | skb_get_timestamp(skb, &tv); | |
649 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
650 | sizeof(tv), &tv); | |
651 | } else { | |
842509b8 | 652 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 653 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 654 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
655 | } |
656 | } | |
657 | ||
658 | ||
659 | memset(ts, 0, sizeof(ts)); | |
660 | if (skb->tstamp.tv64 && | |
661 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
662 | skb_get_timestampns(skb, ts + 0); | |
663 | empty = 0; | |
664 | } | |
665 | if (shhwtstamps) { | |
666 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
667 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
668 | empty = 0; | |
669 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
670 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
671 | empty = 0; | |
92f37fd2 | 672 | } |
20d49473 PO |
673 | if (!empty) |
674 | put_cmsg(msg, SOL_SOCKET, | |
675 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 676 | } |
7c81fd8b ACM |
677 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
678 | ||
6e3e939f JB |
679 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
680 | struct sk_buff *skb) | |
681 | { | |
682 | int ack; | |
683 | ||
684 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
685 | return; | |
686 | if (!skb->wifi_acked_valid) | |
687 | return; | |
688 | ||
689 | ack = skb->wifi_acked; | |
690 | ||
691 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
692 | } | |
693 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
694 | ||
11165f14 | 695 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
696 | struct sk_buff *skb) | |
3b885787 NH |
697 | { |
698 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
699 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
700 | sizeof(__u32), &skb->dropcount); | |
701 | } | |
702 | ||
767dd033 | 703 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
704 | struct sk_buff *skb) |
705 | { | |
706 | sock_recv_timestamp(msg, sk, skb); | |
707 | sock_recv_drops(msg, sk, skb); | |
708 | } | |
767dd033 | 709 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 710 | |
a2e27255 ACM |
711 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
712 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 713 | { |
1da177e4 LT |
714 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
715 | ||
f8451725 HX |
716 | sock_update_classid(sock->sk); |
717 | ||
1da177e4 LT |
718 | si->sock = sock; |
719 | si->scm = NULL; | |
720 | si->msg = msg; | |
721 | si->size = size; | |
722 | si->flags = flags; | |
723 | ||
1da177e4 LT |
724 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
725 | } | |
726 | ||
a2e27255 ACM |
727 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
728 | struct msghdr *msg, size_t size, int flags) | |
729 | { | |
730 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
731 | ||
732 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
733 | } | |
734 | ||
89bddce5 | 735 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
736 | size_t size, int flags) |
737 | { | |
738 | struct kiocb iocb; | |
739 | struct sock_iocb siocb; | |
740 | int ret; | |
741 | ||
89bddce5 | 742 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
743 | iocb.private = &siocb; |
744 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
745 | if (-EIOCBQUEUED == ret) | |
746 | ret = wait_on_sync_kiocb(&iocb); | |
747 | return ret; | |
748 | } | |
c6d409cf | 749 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 750 | |
a2e27255 ACM |
751 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
752 | size_t size, int flags) | |
753 | { | |
754 | struct kiocb iocb; | |
755 | struct sock_iocb siocb; | |
756 | int ret; | |
757 | ||
758 | init_sync_kiocb(&iocb, NULL); | |
759 | iocb.private = &siocb; | |
760 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
761 | if (-EIOCBQUEUED == ret) | |
762 | ret = wait_on_sync_kiocb(&iocb); | |
763 | return ret; | |
764 | } | |
765 | ||
c1249c0a ML |
766 | /** |
767 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
768 | * @sock: The socket to receive the message from | |
769 | * @msg: Received message | |
770 | * @vec: Input s/g array for message data | |
771 | * @num: Size of input s/g array | |
772 | * @size: Number of bytes to read | |
773 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
774 | * | |
775 | * On return the msg structure contains the scatter/gather array passed in the | |
776 | * vec argument. The array is modified so that it consists of the unfilled | |
777 | * portion of the original array. | |
778 | * | |
779 | * The returned value is the total number of bytes received, or an error. | |
780 | */ | |
89bddce5 SH |
781 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
782 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
783 | { |
784 | mm_segment_t oldfs = get_fs(); | |
785 | int result; | |
786 | ||
787 | set_fs(KERNEL_DS); | |
788 | /* | |
789 | * the following is safe, since for compiler definitions of kvec and | |
790 | * iovec are identical, yielding the same in-core layout and alignment | |
791 | */ | |
89bddce5 | 792 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
793 | result = sock_recvmsg(sock, msg, size, flags); |
794 | set_fs(oldfs); | |
795 | return result; | |
796 | } | |
c6d409cf | 797 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 LT |
798 | |
799 | static void sock_aio_dtor(struct kiocb *iocb) | |
800 | { | |
801 | kfree(iocb->private); | |
802 | } | |
803 | ||
ce1d4d3e CH |
804 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
805 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 806 | { |
1da177e4 LT |
807 | struct socket *sock; |
808 | int flags; | |
809 | ||
ce1d4d3e CH |
810 | sock = file->private_data; |
811 | ||
35f9c09f ED |
812 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
813 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
814 | flags |= more; | |
ce1d4d3e | 815 | |
e6949583 | 816 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 817 | } |
1da177e4 | 818 | |
9c55e01c | 819 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 820 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
821 | unsigned int flags) |
822 | { | |
823 | struct socket *sock = file->private_data; | |
824 | ||
997b37da RDC |
825 | if (unlikely(!sock->ops->splice_read)) |
826 | return -EINVAL; | |
827 | ||
f8451725 HX |
828 | sock_update_classid(sock->sk); |
829 | ||
9c55e01c JA |
830 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
831 | } | |
832 | ||
ce1d4d3e | 833 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 834 | struct sock_iocb *siocb) |
ce1d4d3e CH |
835 | { |
836 | if (!is_sync_kiocb(iocb)) { | |
837 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
838 | if (!siocb) | |
839 | return NULL; | |
1da177e4 LT |
840 | iocb->ki_dtor = sock_aio_dtor; |
841 | } | |
1da177e4 | 842 | |
ce1d4d3e | 843 | siocb->kiocb = iocb; |
ce1d4d3e CH |
844 | iocb->private = siocb; |
845 | return siocb; | |
1da177e4 LT |
846 | } |
847 | ||
ce1d4d3e | 848 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
849 | struct file *file, const struct iovec *iov, |
850 | unsigned long nr_segs) | |
ce1d4d3e CH |
851 | { |
852 | struct socket *sock = file->private_data; | |
853 | size_t size = 0; | |
854 | int i; | |
1da177e4 | 855 | |
89bddce5 SH |
856 | for (i = 0; i < nr_segs; i++) |
857 | size += iov[i].iov_len; | |
1da177e4 | 858 | |
ce1d4d3e CH |
859 | msg->msg_name = NULL; |
860 | msg->msg_namelen = 0; | |
861 | msg->msg_control = NULL; | |
862 | msg->msg_controllen = 0; | |
89bddce5 | 863 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
864 | msg->msg_iovlen = nr_segs; |
865 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
866 | ||
867 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
868 | } | |
869 | ||
027445c3 BP |
870 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
871 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
872 | { |
873 | struct sock_iocb siocb, *x; | |
874 | ||
1da177e4 LT |
875 | if (pos != 0) |
876 | return -ESPIPE; | |
027445c3 BP |
877 | |
878 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
879 | return 0; |
880 | ||
027445c3 BP |
881 | |
882 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
883 | if (!x) |
884 | return -ENOMEM; | |
027445c3 | 885 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
886 | } |
887 | ||
ce1d4d3e | 888 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
889 | struct file *file, const struct iovec *iov, |
890 | unsigned long nr_segs) | |
1da177e4 | 891 | { |
ce1d4d3e CH |
892 | struct socket *sock = file->private_data; |
893 | size_t size = 0; | |
894 | int i; | |
1da177e4 | 895 | |
89bddce5 SH |
896 | for (i = 0; i < nr_segs; i++) |
897 | size += iov[i].iov_len; | |
1da177e4 | 898 | |
ce1d4d3e CH |
899 | msg->msg_name = NULL; |
900 | msg->msg_namelen = 0; | |
901 | msg->msg_control = NULL; | |
902 | msg->msg_controllen = 0; | |
89bddce5 | 903 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
904 | msg->msg_iovlen = nr_segs; |
905 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
906 | if (sock->type == SOCK_SEQPACKET) | |
907 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 908 | |
ce1d4d3e | 909 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
910 | } |
911 | ||
027445c3 BP |
912 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
913 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
914 | { |
915 | struct sock_iocb siocb, *x; | |
1da177e4 | 916 | |
ce1d4d3e CH |
917 | if (pos != 0) |
918 | return -ESPIPE; | |
027445c3 | 919 | |
027445c3 | 920 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
921 | if (!x) |
922 | return -ENOMEM; | |
1da177e4 | 923 | |
027445c3 | 924 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
925 | } |
926 | ||
1da177e4 LT |
927 | /* |
928 | * Atomic setting of ioctl hooks to avoid race | |
929 | * with module unload. | |
930 | */ | |
931 | ||
4a3e2f71 | 932 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 933 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 934 | |
881d966b | 935 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 936 | { |
4a3e2f71 | 937 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 938 | br_ioctl_hook = hook; |
4a3e2f71 | 939 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
940 | } |
941 | EXPORT_SYMBOL(brioctl_set); | |
942 | ||
4a3e2f71 | 943 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 944 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 945 | |
881d966b | 946 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 947 | { |
4a3e2f71 | 948 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 949 | vlan_ioctl_hook = hook; |
4a3e2f71 | 950 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
951 | } |
952 | EXPORT_SYMBOL(vlan_ioctl_set); | |
953 | ||
4a3e2f71 | 954 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 955 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 956 | |
89bddce5 | 957 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 958 | { |
4a3e2f71 | 959 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 960 | dlci_ioctl_hook = hook; |
4a3e2f71 | 961 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
962 | } |
963 | EXPORT_SYMBOL(dlci_ioctl_set); | |
964 | ||
6b96018b AB |
965 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
966 | unsigned int cmd, unsigned long arg) | |
967 | { | |
968 | int err; | |
969 | void __user *argp = (void __user *)arg; | |
970 | ||
971 | err = sock->ops->ioctl(sock, cmd, arg); | |
972 | ||
973 | /* | |
974 | * If this ioctl is unknown try to hand it down | |
975 | * to the NIC driver. | |
976 | */ | |
977 | if (err == -ENOIOCTLCMD) | |
978 | err = dev_ioctl(net, cmd, argp); | |
979 | ||
980 | return err; | |
981 | } | |
982 | ||
1da177e4 LT |
983 | /* |
984 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
985 | * what to do with it - that's up to the protocol still. | |
986 | */ | |
987 | ||
988 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
989 | { | |
990 | struct socket *sock; | |
881d966b | 991 | struct sock *sk; |
1da177e4 LT |
992 | void __user *argp = (void __user *)arg; |
993 | int pid, err; | |
881d966b | 994 | struct net *net; |
1da177e4 | 995 | |
b69aee04 | 996 | sock = file->private_data; |
881d966b | 997 | sk = sock->sk; |
3b1e0a65 | 998 | net = sock_net(sk); |
1da177e4 | 999 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1000 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1001 | } else |
3d23e349 | 1002 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1003 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1004 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1005 | } else |
3d23e349 | 1006 | #endif |
89bddce5 | 1007 | switch (cmd) { |
1da177e4 LT |
1008 | case FIOSETOWN: |
1009 | case SIOCSPGRP: | |
1010 | err = -EFAULT; | |
1011 | if (get_user(pid, (int __user *)argp)) | |
1012 | break; | |
1013 | err = f_setown(sock->file, pid, 1); | |
1014 | break; | |
1015 | case FIOGETOWN: | |
1016 | case SIOCGPGRP: | |
609d7fa9 | 1017 | err = put_user(f_getown(sock->file), |
89bddce5 | 1018 | (int __user *)argp); |
1da177e4 LT |
1019 | break; |
1020 | case SIOCGIFBR: | |
1021 | case SIOCSIFBR: | |
1022 | case SIOCBRADDBR: | |
1023 | case SIOCBRDELBR: | |
1024 | err = -ENOPKG; | |
1025 | if (!br_ioctl_hook) | |
1026 | request_module("bridge"); | |
1027 | ||
4a3e2f71 | 1028 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1029 | if (br_ioctl_hook) |
881d966b | 1030 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1031 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1032 | break; |
1033 | case SIOCGIFVLAN: | |
1034 | case SIOCSIFVLAN: | |
1035 | err = -ENOPKG; | |
1036 | if (!vlan_ioctl_hook) | |
1037 | request_module("8021q"); | |
1038 | ||
4a3e2f71 | 1039 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1040 | if (vlan_ioctl_hook) |
881d966b | 1041 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1042 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1043 | break; |
1da177e4 LT |
1044 | case SIOCADDDLCI: |
1045 | case SIOCDELDLCI: | |
1046 | err = -ENOPKG; | |
1047 | if (!dlci_ioctl_hook) | |
1048 | request_module("dlci"); | |
1049 | ||
7512cbf6 PE |
1050 | mutex_lock(&dlci_ioctl_mutex); |
1051 | if (dlci_ioctl_hook) | |
1da177e4 | 1052 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1053 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1054 | break; |
1055 | default: | |
6b96018b | 1056 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1057 | break; |
89bddce5 | 1058 | } |
1da177e4 LT |
1059 | return err; |
1060 | } | |
1061 | ||
1062 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1063 | { | |
1064 | int err; | |
1065 | struct socket *sock = NULL; | |
89bddce5 | 1066 | |
1da177e4 LT |
1067 | err = security_socket_create(family, type, protocol, 1); |
1068 | if (err) | |
1069 | goto out; | |
1070 | ||
1071 | sock = sock_alloc(); | |
1072 | if (!sock) { | |
1073 | err = -ENOMEM; | |
1074 | goto out; | |
1075 | } | |
1076 | ||
1da177e4 | 1077 | sock->type = type; |
7420ed23 VY |
1078 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1079 | if (err) | |
1080 | goto out_release; | |
1081 | ||
1da177e4 LT |
1082 | out: |
1083 | *res = sock; | |
1084 | return err; | |
7420ed23 VY |
1085 | out_release: |
1086 | sock_release(sock); | |
1087 | sock = NULL; | |
1088 | goto out; | |
1da177e4 | 1089 | } |
c6d409cf | 1090 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1091 | |
1092 | /* No kernel lock held - perfect */ | |
89bddce5 | 1093 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1094 | { |
1095 | struct socket *sock; | |
1096 | ||
1097 | /* | |
89bddce5 | 1098 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1099 | */ |
b69aee04 | 1100 | sock = file->private_data; |
1da177e4 LT |
1101 | return sock->ops->poll(file, sock, wait); |
1102 | } | |
1103 | ||
89bddce5 | 1104 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1105 | { |
b69aee04 | 1106 | struct socket *sock = file->private_data; |
1da177e4 LT |
1107 | |
1108 | return sock->ops->mmap(file, sock, vma); | |
1109 | } | |
1110 | ||
20380731 | 1111 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1112 | { |
1113 | /* | |
89bddce5 SH |
1114 | * It was possible the inode is NULL we were |
1115 | * closing an unfinished socket. | |
1da177e4 LT |
1116 | */ |
1117 | ||
89bddce5 | 1118 | if (!inode) { |
1da177e4 LT |
1119 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1120 | return 0; | |
1121 | } | |
1da177e4 LT |
1122 | sock_release(SOCKET_I(inode)); |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * Update the socket async list | |
1128 | * | |
1129 | * Fasync_list locking strategy. | |
1130 | * | |
1131 | * 1. fasync_list is modified only under process context socket lock | |
1132 | * i.e. under semaphore. | |
1133 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1134 | * or under socket lock |
1da177e4 LT |
1135 | */ |
1136 | ||
1137 | static int sock_fasync(int fd, struct file *filp, int on) | |
1138 | { | |
989a2979 ED |
1139 | struct socket *sock = filp->private_data; |
1140 | struct sock *sk = sock->sk; | |
eaefd110 | 1141 | struct socket_wq *wq; |
1da177e4 | 1142 | |
989a2979 | 1143 | if (sk == NULL) |
1da177e4 | 1144 | return -EINVAL; |
1da177e4 LT |
1145 | |
1146 | lock_sock(sk); | |
eaefd110 ED |
1147 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1148 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1149 | |
eaefd110 | 1150 | if (!wq->fasync_list) |
989a2979 ED |
1151 | sock_reset_flag(sk, SOCK_FASYNC); |
1152 | else | |
bcdce719 | 1153 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1154 | |
989a2979 | 1155 | release_sock(sk); |
1da177e4 LT |
1156 | return 0; |
1157 | } | |
1158 | ||
43815482 | 1159 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1160 | |
1161 | int sock_wake_async(struct socket *sock, int how, int band) | |
1162 | { | |
43815482 ED |
1163 | struct socket_wq *wq; |
1164 | ||
1165 | if (!sock) | |
1166 | return -1; | |
1167 | rcu_read_lock(); | |
1168 | wq = rcu_dereference(sock->wq); | |
1169 | if (!wq || !wq->fasync_list) { | |
1170 | rcu_read_unlock(); | |
1da177e4 | 1171 | return -1; |
43815482 | 1172 | } |
89bddce5 | 1173 | switch (how) { |
8d8ad9d7 | 1174 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1175 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1176 | break; | |
1177 | goto call_kill; | |
8d8ad9d7 | 1178 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1179 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1180 | break; | |
1181 | /* fall through */ | |
8d8ad9d7 | 1182 | case SOCK_WAKE_IO: |
89bddce5 | 1183 | call_kill: |
43815482 | 1184 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1185 | break; |
8d8ad9d7 | 1186 | case SOCK_WAKE_URG: |
43815482 | 1187 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1188 | } |
43815482 | 1189 | rcu_read_unlock(); |
1da177e4 LT |
1190 | return 0; |
1191 | } | |
c6d409cf | 1192 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1193 | |
721db93a | 1194 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1195 | struct socket **res, int kern) |
1da177e4 LT |
1196 | { |
1197 | int err; | |
1198 | struct socket *sock; | |
55737fda | 1199 | const struct net_proto_family *pf; |
1da177e4 LT |
1200 | |
1201 | /* | |
89bddce5 | 1202 | * Check protocol is in range |
1da177e4 LT |
1203 | */ |
1204 | if (family < 0 || family >= NPROTO) | |
1205 | return -EAFNOSUPPORT; | |
1206 | if (type < 0 || type >= SOCK_MAX) | |
1207 | return -EINVAL; | |
1208 | ||
1209 | /* Compatibility. | |
1210 | ||
1211 | This uglymoron is moved from INET layer to here to avoid | |
1212 | deadlock in module load. | |
1213 | */ | |
1214 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1215 | static int warned; |
1da177e4 LT |
1216 | if (!warned) { |
1217 | warned = 1; | |
89bddce5 SH |
1218 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1219 | current->comm); | |
1da177e4 LT |
1220 | } |
1221 | family = PF_PACKET; | |
1222 | } | |
1223 | ||
1224 | err = security_socket_create(family, type, protocol, kern); | |
1225 | if (err) | |
1226 | return err; | |
89bddce5 | 1227 | |
55737fda SH |
1228 | /* |
1229 | * Allocate the socket and allow the family to set things up. if | |
1230 | * the protocol is 0, the family is instructed to select an appropriate | |
1231 | * default. | |
1232 | */ | |
1233 | sock = sock_alloc(); | |
1234 | if (!sock) { | |
e87cc472 | 1235 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1236 | return -ENFILE; /* Not exactly a match, but its the |
1237 | closest posix thing */ | |
1238 | } | |
1239 | ||
1240 | sock->type = type; | |
1241 | ||
95a5afca | 1242 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1243 | /* Attempt to load a protocol module if the find failed. |
1244 | * | |
1245 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1246 | * requested real, full-featured networking support upon configuration. |
1247 | * Otherwise module support will break! | |
1248 | */ | |
190683a9 | 1249 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1250 | request_module("net-pf-%d", family); |
1da177e4 LT |
1251 | #endif |
1252 | ||
55737fda SH |
1253 | rcu_read_lock(); |
1254 | pf = rcu_dereference(net_families[family]); | |
1255 | err = -EAFNOSUPPORT; | |
1256 | if (!pf) | |
1257 | goto out_release; | |
1da177e4 LT |
1258 | |
1259 | /* | |
1260 | * We will call the ->create function, that possibly is in a loadable | |
1261 | * module, so we have to bump that loadable module refcnt first. | |
1262 | */ | |
55737fda | 1263 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1264 | goto out_release; |
1265 | ||
55737fda SH |
1266 | /* Now protected by module ref count */ |
1267 | rcu_read_unlock(); | |
1268 | ||
3f378b68 | 1269 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1270 | if (err < 0) |
1da177e4 | 1271 | goto out_module_put; |
a79af59e | 1272 | |
1da177e4 LT |
1273 | /* |
1274 | * Now to bump the refcnt of the [loadable] module that owns this | |
1275 | * socket at sock_release time we decrement its refcnt. | |
1276 | */ | |
55737fda SH |
1277 | if (!try_module_get(sock->ops->owner)) |
1278 | goto out_module_busy; | |
1279 | ||
1da177e4 LT |
1280 | /* |
1281 | * Now that we're done with the ->create function, the [loadable] | |
1282 | * module can have its refcnt decremented | |
1283 | */ | |
55737fda | 1284 | module_put(pf->owner); |
7420ed23 VY |
1285 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1286 | if (err) | |
3b185525 | 1287 | goto out_sock_release; |
55737fda | 1288 | *res = sock; |
1da177e4 | 1289 | |
55737fda SH |
1290 | return 0; |
1291 | ||
1292 | out_module_busy: | |
1293 | err = -EAFNOSUPPORT; | |
1da177e4 | 1294 | out_module_put: |
55737fda SH |
1295 | sock->ops = NULL; |
1296 | module_put(pf->owner); | |
1297 | out_sock_release: | |
1da177e4 | 1298 | sock_release(sock); |
55737fda SH |
1299 | return err; |
1300 | ||
1301 | out_release: | |
1302 | rcu_read_unlock(); | |
1303 | goto out_sock_release; | |
1da177e4 | 1304 | } |
721db93a | 1305 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1306 | |
1307 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1308 | { | |
1b8d7ae4 | 1309 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1310 | } |
c6d409cf | 1311 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1312 | |
1313 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1314 | { | |
1b8d7ae4 | 1315 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1316 | } |
c6d409cf | 1317 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1318 | |
3e0fa65f | 1319 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1320 | { |
1321 | int retval; | |
1322 | struct socket *sock; | |
a677a039 UD |
1323 | int flags; |
1324 | ||
e38b36f3 UD |
1325 | /* Check the SOCK_* constants for consistency. */ |
1326 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1327 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1328 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1329 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1330 | ||
a677a039 | 1331 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1332 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1333 | return -EINVAL; |
1334 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1335 | |
aaca0bdc UD |
1336 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1337 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1338 | ||
1da177e4 LT |
1339 | retval = sock_create(family, type, protocol, &sock); |
1340 | if (retval < 0) | |
1341 | goto out; | |
1342 | ||
77d27200 | 1343 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1344 | if (retval < 0) |
1345 | goto out_release; | |
1346 | ||
1347 | out: | |
1348 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1349 | return retval; | |
1350 | ||
1351 | out_release: | |
1352 | sock_release(sock); | |
1353 | return retval; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * Create a pair of connected sockets. | |
1358 | */ | |
1359 | ||
3e0fa65f HC |
1360 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1361 | int __user *, usockvec) | |
1da177e4 LT |
1362 | { |
1363 | struct socket *sock1, *sock2; | |
1364 | int fd1, fd2, err; | |
db349509 | 1365 | struct file *newfile1, *newfile2; |
a677a039 UD |
1366 | int flags; |
1367 | ||
1368 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1369 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1370 | return -EINVAL; |
1371 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1372 | |
aaca0bdc UD |
1373 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1374 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1375 | ||
1da177e4 LT |
1376 | /* |
1377 | * Obtain the first socket and check if the underlying protocol | |
1378 | * supports the socketpair call. | |
1379 | */ | |
1380 | ||
1381 | err = sock_create(family, type, protocol, &sock1); | |
1382 | if (err < 0) | |
1383 | goto out; | |
1384 | ||
1385 | err = sock_create(family, type, protocol, &sock2); | |
1386 | if (err < 0) | |
1387 | goto out_release_1; | |
1388 | ||
1389 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1390 | if (err < 0) |
1da177e4 LT |
1391 | goto out_release_both; |
1392 | ||
28407630 | 1393 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1394 | if (unlikely(fd1 < 0)) { |
1395 | err = fd1; | |
db349509 | 1396 | goto out_release_both; |
bf3c23d1 | 1397 | } |
28407630 | 1398 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1399 | if (unlikely(fd2 < 0)) { |
1400 | err = fd2; | |
28407630 AV |
1401 | put_unused_fd(fd1); |
1402 | goto out_release_both; | |
1403 | } | |
1404 | ||
1405 | newfile1 = sock_alloc_file(sock1, flags); | |
1406 | if (unlikely(IS_ERR(newfile1))) { | |
1407 | err = PTR_ERR(newfile1); | |
1408 | put_unused_fd(fd1); | |
1409 | put_unused_fd(fd2); | |
1410 | goto out_release_both; | |
1411 | } | |
1412 | ||
1413 | newfile2 = sock_alloc_file(sock2, flags); | |
1414 | if (IS_ERR(newfile2)) { | |
1415 | err = PTR_ERR(newfile2); | |
198de4d7 AV |
1416 | fput(newfile1); |
1417 | put_unused_fd(fd1); | |
28407630 | 1418 | put_unused_fd(fd2); |
198de4d7 AV |
1419 | sock_release(sock2); |
1420 | goto out; | |
db349509 AV |
1421 | } |
1422 | ||
157cf649 | 1423 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1424 | fd_install(fd1, newfile1); |
1425 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1426 | /* fd1 and fd2 may be already another descriptors. |
1427 | * Not kernel problem. | |
1428 | */ | |
1429 | ||
89bddce5 | 1430 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1431 | if (!err) |
1432 | err = put_user(fd2, &usockvec[1]); | |
1433 | if (!err) | |
1434 | return 0; | |
1435 | ||
1436 | sys_close(fd2); | |
1437 | sys_close(fd1); | |
1438 | return err; | |
1439 | ||
1da177e4 | 1440 | out_release_both: |
89bddce5 | 1441 | sock_release(sock2); |
1da177e4 | 1442 | out_release_1: |
89bddce5 | 1443 | sock_release(sock1); |
1da177e4 LT |
1444 | out: |
1445 | return err; | |
1446 | } | |
1447 | ||
1da177e4 LT |
1448 | /* |
1449 | * Bind a name to a socket. Nothing much to do here since it's | |
1450 | * the protocol's responsibility to handle the local address. | |
1451 | * | |
1452 | * We move the socket address to kernel space before we call | |
1453 | * the protocol layer (having also checked the address is ok). | |
1454 | */ | |
1455 | ||
20f37034 | 1456 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1457 | { |
1458 | struct socket *sock; | |
230b1839 | 1459 | struct sockaddr_storage address; |
6cb153ca | 1460 | int err, fput_needed; |
1da177e4 | 1461 | |
89bddce5 | 1462 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1463 | if (sock) { |
43db362d | 1464 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1465 | if (err >= 0) { |
1466 | err = security_socket_bind(sock, | |
230b1839 | 1467 | (struct sockaddr *)&address, |
89bddce5 | 1468 | addrlen); |
6cb153ca BL |
1469 | if (!err) |
1470 | err = sock->ops->bind(sock, | |
89bddce5 | 1471 | (struct sockaddr *) |
230b1839 | 1472 | &address, addrlen); |
1da177e4 | 1473 | } |
6cb153ca | 1474 | fput_light(sock->file, fput_needed); |
89bddce5 | 1475 | } |
1da177e4 LT |
1476 | return err; |
1477 | } | |
1478 | ||
1da177e4 LT |
1479 | /* |
1480 | * Perform a listen. Basically, we allow the protocol to do anything | |
1481 | * necessary for a listen, and if that works, we mark the socket as | |
1482 | * ready for listening. | |
1483 | */ | |
1484 | ||
3e0fa65f | 1485 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1486 | { |
1487 | struct socket *sock; | |
6cb153ca | 1488 | int err, fput_needed; |
b8e1f9b5 | 1489 | int somaxconn; |
89bddce5 SH |
1490 | |
1491 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1492 | if (sock) { | |
8efa6e93 | 1493 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1494 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1495 | backlog = somaxconn; |
1da177e4 LT |
1496 | |
1497 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1498 | if (!err) |
1499 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1500 | |
6cb153ca | 1501 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1502 | } |
1503 | return err; | |
1504 | } | |
1505 | ||
1da177e4 LT |
1506 | /* |
1507 | * For accept, we attempt to create a new socket, set up the link | |
1508 | * with the client, wake up the client, then return the new | |
1509 | * connected fd. We collect the address of the connector in kernel | |
1510 | * space and move it to user at the very end. This is unclean because | |
1511 | * we open the socket then return an error. | |
1512 | * | |
1513 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1514 | * status to recvmsg. We need to add that support in a way thats | |
1515 | * clean when we restucture accept also. | |
1516 | */ | |
1517 | ||
20f37034 HC |
1518 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1519 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1520 | { |
1521 | struct socket *sock, *newsock; | |
39d8c1b6 | 1522 | struct file *newfile; |
6cb153ca | 1523 | int err, len, newfd, fput_needed; |
230b1839 | 1524 | struct sockaddr_storage address; |
1da177e4 | 1525 | |
77d27200 | 1526 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1527 | return -EINVAL; |
1528 | ||
1529 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1530 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1531 | ||
6cb153ca | 1532 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1533 | if (!sock) |
1534 | goto out; | |
1535 | ||
1536 | err = -ENFILE; | |
c6d409cf ED |
1537 | newsock = sock_alloc(); |
1538 | if (!newsock) | |
1da177e4 LT |
1539 | goto out_put; |
1540 | ||
1541 | newsock->type = sock->type; | |
1542 | newsock->ops = sock->ops; | |
1543 | ||
1da177e4 LT |
1544 | /* |
1545 | * We don't need try_module_get here, as the listening socket (sock) | |
1546 | * has the protocol module (sock->ops->owner) held. | |
1547 | */ | |
1548 | __module_get(newsock->ops->owner); | |
1549 | ||
28407630 | 1550 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1551 | if (unlikely(newfd < 0)) { |
1552 | err = newfd; | |
9a1875e6 DM |
1553 | sock_release(newsock); |
1554 | goto out_put; | |
39d8c1b6 | 1555 | } |
28407630 AV |
1556 | newfile = sock_alloc_file(newsock, flags); |
1557 | if (unlikely(IS_ERR(newfile))) { | |
1558 | err = PTR_ERR(newfile); | |
1559 | put_unused_fd(newfd); | |
1560 | sock_release(newsock); | |
1561 | goto out_put; | |
1562 | } | |
39d8c1b6 | 1563 | |
a79af59e FF |
1564 | err = security_socket_accept(sock, newsock); |
1565 | if (err) | |
39d8c1b6 | 1566 | goto out_fd; |
a79af59e | 1567 | |
1da177e4 LT |
1568 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1569 | if (err < 0) | |
39d8c1b6 | 1570 | goto out_fd; |
1da177e4 LT |
1571 | |
1572 | if (upeer_sockaddr) { | |
230b1839 | 1573 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1574 | &len, 2) < 0) { |
1da177e4 | 1575 | err = -ECONNABORTED; |
39d8c1b6 | 1576 | goto out_fd; |
1da177e4 | 1577 | } |
43db362d | 1578 | err = move_addr_to_user(&address, |
230b1839 | 1579 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1580 | if (err < 0) |
39d8c1b6 | 1581 | goto out_fd; |
1da177e4 LT |
1582 | } |
1583 | ||
1584 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1585 | ||
39d8c1b6 DM |
1586 | fd_install(newfd, newfile); |
1587 | err = newfd; | |
1da177e4 | 1588 | |
1da177e4 | 1589 | out_put: |
6cb153ca | 1590 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1591 | out: |
1592 | return err; | |
39d8c1b6 | 1593 | out_fd: |
9606a216 | 1594 | fput(newfile); |
39d8c1b6 | 1595 | put_unused_fd(newfd); |
1da177e4 LT |
1596 | goto out_put; |
1597 | } | |
1598 | ||
20f37034 HC |
1599 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1600 | int __user *, upeer_addrlen) | |
aaca0bdc | 1601 | { |
de11defe | 1602 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1603 | } |
1604 | ||
1da177e4 LT |
1605 | /* |
1606 | * Attempt to connect to a socket with the server address. The address | |
1607 | * is in user space so we verify it is OK and move it to kernel space. | |
1608 | * | |
1609 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1610 | * break bindings | |
1611 | * | |
1612 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1613 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1614 | * include the -EINPROGRESS status for such sockets. | |
1615 | */ | |
1616 | ||
20f37034 HC |
1617 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1618 | int, addrlen) | |
1da177e4 LT |
1619 | { |
1620 | struct socket *sock; | |
230b1839 | 1621 | struct sockaddr_storage address; |
6cb153ca | 1622 | int err, fput_needed; |
1da177e4 | 1623 | |
6cb153ca | 1624 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1625 | if (!sock) |
1626 | goto out; | |
43db362d | 1627 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1628 | if (err < 0) |
1629 | goto out_put; | |
1630 | ||
89bddce5 | 1631 | err = |
230b1839 | 1632 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1633 | if (err) |
1634 | goto out_put; | |
1635 | ||
230b1839 | 1636 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1637 | sock->file->f_flags); |
1638 | out_put: | |
6cb153ca | 1639 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1640 | out: |
1641 | return err; | |
1642 | } | |
1643 | ||
1644 | /* | |
1645 | * Get the local address ('name') of a socket object. Move the obtained | |
1646 | * name to user space. | |
1647 | */ | |
1648 | ||
20f37034 HC |
1649 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1650 | int __user *, usockaddr_len) | |
1da177e4 LT |
1651 | { |
1652 | struct socket *sock; | |
230b1839 | 1653 | struct sockaddr_storage address; |
6cb153ca | 1654 | int len, err, fput_needed; |
89bddce5 | 1655 | |
6cb153ca | 1656 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1657 | if (!sock) |
1658 | goto out; | |
1659 | ||
1660 | err = security_socket_getsockname(sock); | |
1661 | if (err) | |
1662 | goto out_put; | |
1663 | ||
230b1839 | 1664 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1665 | if (err) |
1666 | goto out_put; | |
43db362d | 1667 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1668 | |
1669 | out_put: | |
6cb153ca | 1670 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1671 | out: |
1672 | return err; | |
1673 | } | |
1674 | ||
1675 | /* | |
1676 | * Get the remote address ('name') of a socket object. Move the obtained | |
1677 | * name to user space. | |
1678 | */ | |
1679 | ||
20f37034 HC |
1680 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1681 | int __user *, usockaddr_len) | |
1da177e4 LT |
1682 | { |
1683 | struct socket *sock; | |
230b1839 | 1684 | struct sockaddr_storage address; |
6cb153ca | 1685 | int len, err, fput_needed; |
1da177e4 | 1686 | |
89bddce5 SH |
1687 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1688 | if (sock != NULL) { | |
1da177e4 LT |
1689 | err = security_socket_getpeername(sock); |
1690 | if (err) { | |
6cb153ca | 1691 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1692 | return err; |
1693 | } | |
1694 | ||
89bddce5 | 1695 | err = |
230b1839 | 1696 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1697 | 1); |
1da177e4 | 1698 | if (!err) |
43db362d | 1699 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1700 | usockaddr_len); |
6cb153ca | 1701 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1702 | } |
1703 | return err; | |
1704 | } | |
1705 | ||
1706 | /* | |
1707 | * Send a datagram to a given address. We move the address into kernel | |
1708 | * space and check the user space data area is readable before invoking | |
1709 | * the protocol. | |
1710 | */ | |
1711 | ||
3e0fa65f | 1712 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1713 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1714 | int, addr_len) |
1da177e4 LT |
1715 | { |
1716 | struct socket *sock; | |
230b1839 | 1717 | struct sockaddr_storage address; |
1da177e4 LT |
1718 | int err; |
1719 | struct msghdr msg; | |
1720 | struct iovec iov; | |
6cb153ca | 1721 | int fput_needed; |
6cb153ca | 1722 | |
253eacc0 LT |
1723 | if (len > INT_MAX) |
1724 | len = INT_MAX; | |
de0fa95c PE |
1725 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1726 | if (!sock) | |
4387ff75 | 1727 | goto out; |
6cb153ca | 1728 | |
89bddce5 SH |
1729 | iov.iov_base = buff; |
1730 | iov.iov_len = len; | |
1731 | msg.msg_name = NULL; | |
1732 | msg.msg_iov = &iov; | |
1733 | msg.msg_iovlen = 1; | |
1734 | msg.msg_control = NULL; | |
1735 | msg.msg_controllen = 0; | |
1736 | msg.msg_namelen = 0; | |
6cb153ca | 1737 | if (addr) { |
43db362d | 1738 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1739 | if (err < 0) |
1740 | goto out_put; | |
230b1839 | 1741 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1742 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1743 | } |
1744 | if (sock->file->f_flags & O_NONBLOCK) | |
1745 | flags |= MSG_DONTWAIT; | |
1746 | msg.msg_flags = flags; | |
1747 | err = sock_sendmsg(sock, &msg, len); | |
1748 | ||
89bddce5 | 1749 | out_put: |
de0fa95c | 1750 | fput_light(sock->file, fput_needed); |
4387ff75 | 1751 | out: |
1da177e4 LT |
1752 | return err; |
1753 | } | |
1754 | ||
1755 | /* | |
89bddce5 | 1756 | * Send a datagram down a socket. |
1da177e4 LT |
1757 | */ |
1758 | ||
3e0fa65f | 1759 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1760 | unsigned int, flags) |
1da177e4 LT |
1761 | { |
1762 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1763 | } | |
1764 | ||
1765 | /* | |
89bddce5 | 1766 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1767 | * sender. We verify the buffers are writable and if needed move the |
1768 | * sender address from kernel to user space. | |
1769 | */ | |
1770 | ||
3e0fa65f | 1771 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1772 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1773 | int __user *, addr_len) |
1da177e4 LT |
1774 | { |
1775 | struct socket *sock; | |
1776 | struct iovec iov; | |
1777 | struct msghdr msg; | |
230b1839 | 1778 | struct sockaddr_storage address; |
89bddce5 | 1779 | int err, err2; |
6cb153ca BL |
1780 | int fput_needed; |
1781 | ||
253eacc0 LT |
1782 | if (size > INT_MAX) |
1783 | size = INT_MAX; | |
de0fa95c | 1784 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1785 | if (!sock) |
de0fa95c | 1786 | goto out; |
1da177e4 | 1787 | |
89bddce5 SH |
1788 | msg.msg_control = NULL; |
1789 | msg.msg_controllen = 0; | |
1790 | msg.msg_iovlen = 1; | |
1791 | msg.msg_iov = &iov; | |
1792 | iov.iov_len = size; | |
1793 | iov.iov_base = ubuf; | |
230b1839 YH |
1794 | msg.msg_name = (struct sockaddr *)&address; |
1795 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1796 | if (sock->file->f_flags & O_NONBLOCK) |
1797 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1798 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1799 | |
89bddce5 | 1800 | if (err >= 0 && addr != NULL) { |
43db362d | 1801 | err2 = move_addr_to_user(&address, |
230b1839 | 1802 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1803 | if (err2 < 0) |
1804 | err = err2; | |
1da177e4 | 1805 | } |
de0fa95c PE |
1806 | |
1807 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1808 | out: |
1da177e4 LT |
1809 | return err; |
1810 | } | |
1811 | ||
1812 | /* | |
89bddce5 | 1813 | * Receive a datagram from a socket. |
1da177e4 LT |
1814 | */ |
1815 | ||
89bddce5 | 1816 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
95c96174 | 1817 | unsigned int flags) |
1da177e4 LT |
1818 | { |
1819 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1820 | } | |
1821 | ||
1822 | /* | |
1823 | * Set a socket option. Because we don't know the option lengths we have | |
1824 | * to pass the user mode parameter for the protocols to sort out. | |
1825 | */ | |
1826 | ||
20f37034 HC |
1827 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1828 | char __user *, optval, int, optlen) | |
1da177e4 | 1829 | { |
6cb153ca | 1830 | int err, fput_needed; |
1da177e4 LT |
1831 | struct socket *sock; |
1832 | ||
1833 | if (optlen < 0) | |
1834 | return -EINVAL; | |
89bddce5 SH |
1835 | |
1836 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1837 | if (sock != NULL) { | |
1838 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1839 | if (err) |
1840 | goto out_put; | |
1da177e4 LT |
1841 | |
1842 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1843 | err = |
1844 | sock_setsockopt(sock, level, optname, optval, | |
1845 | optlen); | |
1da177e4 | 1846 | else |
89bddce5 SH |
1847 | err = |
1848 | sock->ops->setsockopt(sock, level, optname, optval, | |
1849 | optlen); | |
6cb153ca BL |
1850 | out_put: |
1851 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1852 | } |
1853 | return err; | |
1854 | } | |
1855 | ||
1856 | /* | |
1857 | * Get a socket option. Because we don't know the option lengths we have | |
1858 | * to pass a user mode parameter for the protocols to sort out. | |
1859 | */ | |
1860 | ||
20f37034 HC |
1861 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1862 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1863 | { |
6cb153ca | 1864 | int err, fput_needed; |
1da177e4 LT |
1865 | struct socket *sock; |
1866 | ||
89bddce5 SH |
1867 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1868 | if (sock != NULL) { | |
6cb153ca BL |
1869 | err = security_socket_getsockopt(sock, level, optname); |
1870 | if (err) | |
1871 | goto out_put; | |
1da177e4 LT |
1872 | |
1873 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1874 | err = |
1875 | sock_getsockopt(sock, level, optname, optval, | |
1876 | optlen); | |
1da177e4 | 1877 | else |
89bddce5 SH |
1878 | err = |
1879 | sock->ops->getsockopt(sock, level, optname, optval, | |
1880 | optlen); | |
6cb153ca BL |
1881 | out_put: |
1882 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1883 | } |
1884 | return err; | |
1885 | } | |
1886 | ||
1da177e4 LT |
1887 | /* |
1888 | * Shutdown a socket. | |
1889 | */ | |
1890 | ||
754fe8d2 | 1891 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1892 | { |
6cb153ca | 1893 | int err, fput_needed; |
1da177e4 LT |
1894 | struct socket *sock; |
1895 | ||
89bddce5 SH |
1896 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1897 | if (sock != NULL) { | |
1da177e4 | 1898 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1899 | if (!err) |
1900 | err = sock->ops->shutdown(sock, how); | |
1901 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1902 | } |
1903 | return err; | |
1904 | } | |
1905 | ||
89bddce5 | 1906 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1907 | * fields which are the same type (int / unsigned) on our platforms. |
1908 | */ | |
1909 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1910 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1911 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1912 | ||
c71d8ebe TH |
1913 | struct used_address { |
1914 | struct sockaddr_storage name; | |
1915 | unsigned int name_len; | |
1916 | }; | |
1917 | ||
228e548e | 1918 | static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 1919 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1920 | struct used_address *used_address) |
1da177e4 | 1921 | { |
89bddce5 SH |
1922 | struct compat_msghdr __user *msg_compat = |
1923 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1924 | struct sockaddr_storage address; |
1da177e4 | 1925 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1926 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1927 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1928 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 1929 | unsigned char *ctl_buf = ctl; |
a74e9106 | 1930 | int err, ctl_len, total_len; |
89bddce5 | 1931 | |
1da177e4 LT |
1932 | err = -EFAULT; |
1933 | if (MSG_CMSG_COMPAT & flags) { | |
228e548e | 1934 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1935 | return -EFAULT; |
228e548e | 1936 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
1da177e4 LT |
1937 | return -EFAULT; |
1938 | ||
228e548e | 1939 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
1940 | err = -EMSGSIZE; |
1941 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
1942 | goto out; | |
1943 | err = -ENOMEM; | |
1944 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
1945 | GFP_KERNEL); | |
1da177e4 | 1946 | if (!iov) |
228e548e | 1947 | goto out; |
1da177e4 LT |
1948 | } |
1949 | ||
1950 | /* This will also move the address data into kernel space */ | |
1951 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 1952 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 1953 | } else |
43db362d | 1954 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 1955 | if (err < 0) |
1da177e4 LT |
1956 | goto out_freeiov; |
1957 | total_len = err; | |
1958 | ||
1959 | err = -ENOBUFS; | |
1960 | ||
228e548e | 1961 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 1962 | goto out_freeiov; |
228e548e | 1963 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 1964 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 1965 | err = |
228e548e | 1966 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 1967 | sizeof(ctl)); |
1da177e4 LT |
1968 | if (err) |
1969 | goto out_freeiov; | |
228e548e AB |
1970 | ctl_buf = msg_sys->msg_control; |
1971 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 1972 | } else if (ctl_len) { |
89bddce5 | 1973 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1974 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1975 | if (ctl_buf == NULL) |
1da177e4 LT |
1976 | goto out_freeiov; |
1977 | } | |
1978 | err = -EFAULT; | |
1979 | /* | |
228e548e | 1980 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
1981 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
1982 | * checking falls down on this. | |
1983 | */ | |
fb8621bb | 1984 | if (copy_from_user(ctl_buf, |
228e548e | 1985 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 1986 | ctl_len)) |
1da177e4 | 1987 | goto out_freectl; |
228e548e | 1988 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 1989 | } |
228e548e | 1990 | msg_sys->msg_flags = flags; |
1da177e4 LT |
1991 | |
1992 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 1993 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
1994 | /* |
1995 | * If this is sendmmsg() and current destination address is same as | |
1996 | * previously succeeded address, omit asking LSM's decision. | |
1997 | * used_address->name_len is initialized to UINT_MAX so that the first | |
1998 | * destination address never matches. | |
1999 | */ | |
bc909d9d MD |
2000 | if (used_address && msg_sys->msg_name && |
2001 | used_address->name_len == msg_sys->msg_namelen && | |
2002 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2003 | used_address->name_len)) { |
2004 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2005 | goto out_freectl; | |
2006 | } | |
2007 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2008 | /* | |
2009 | * If this is sendmmsg() and sending to current destination address was | |
2010 | * successful, remember it. | |
2011 | */ | |
2012 | if (used_address && err >= 0) { | |
2013 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2014 | if (msg_sys->msg_name) |
2015 | memcpy(&used_address->name, msg_sys->msg_name, | |
2016 | used_address->name_len); | |
c71d8ebe | 2017 | } |
1da177e4 LT |
2018 | |
2019 | out_freectl: | |
89bddce5 | 2020 | if (ctl_buf != ctl) |
1da177e4 LT |
2021 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2022 | out_freeiov: | |
2023 | if (iov != iovstack) | |
a74e9106 | 2024 | kfree(iov); |
228e548e AB |
2025 | out: |
2026 | return err; | |
2027 | } | |
2028 | ||
2029 | /* | |
2030 | * BSD sendmsg interface | |
2031 | */ | |
2032 | ||
95c96174 | 2033 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
228e548e AB |
2034 | { |
2035 | int fput_needed, err; | |
2036 | struct msghdr msg_sys; | |
2037 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2038 | ||
2039 | if (!sock) | |
2040 | goto out; | |
2041 | ||
c71d8ebe | 2042 | err = __sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2043 | |
6cb153ca | 2044 | fput_light(sock->file, fput_needed); |
89bddce5 | 2045 | out: |
1da177e4 LT |
2046 | return err; |
2047 | } | |
2048 | ||
228e548e AB |
2049 | /* |
2050 | * Linux sendmmsg interface | |
2051 | */ | |
2052 | ||
2053 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2054 | unsigned int flags) | |
2055 | { | |
2056 | int fput_needed, err, datagrams; | |
2057 | struct socket *sock; | |
2058 | struct mmsghdr __user *entry; | |
2059 | struct compat_mmsghdr __user *compat_entry; | |
2060 | struct msghdr msg_sys; | |
c71d8ebe | 2061 | struct used_address used_address; |
228e548e | 2062 | |
98382f41 AB |
2063 | if (vlen > UIO_MAXIOV) |
2064 | vlen = UIO_MAXIOV; | |
228e548e AB |
2065 | |
2066 | datagrams = 0; | |
2067 | ||
2068 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2069 | if (!sock) | |
2070 | return err; | |
2071 | ||
c71d8ebe | 2072 | used_address.name_len = UINT_MAX; |
228e548e AB |
2073 | entry = mmsg; |
2074 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2075 | err = 0; |
228e548e AB |
2076 | |
2077 | while (datagrams < vlen) { | |
228e548e AB |
2078 | if (MSG_CMSG_COMPAT & flags) { |
2079 | err = __sys_sendmsg(sock, (struct msghdr __user *)compat_entry, | |
c71d8ebe | 2080 | &msg_sys, flags, &used_address); |
228e548e AB |
2081 | if (err < 0) |
2082 | break; | |
2083 | err = __put_user(err, &compat_entry->msg_len); | |
2084 | ++compat_entry; | |
2085 | } else { | |
2086 | err = __sys_sendmsg(sock, (struct msghdr __user *)entry, | |
c71d8ebe | 2087 | &msg_sys, flags, &used_address); |
228e548e AB |
2088 | if (err < 0) |
2089 | break; | |
2090 | err = put_user(err, &entry->msg_len); | |
2091 | ++entry; | |
2092 | } | |
2093 | ||
2094 | if (err) | |
2095 | break; | |
2096 | ++datagrams; | |
2097 | } | |
2098 | ||
228e548e AB |
2099 | fput_light(sock->file, fput_needed); |
2100 | ||
728ffb86 AB |
2101 | /* We only return an error if no datagrams were able to be sent */ |
2102 | if (datagrams != 0) | |
228e548e AB |
2103 | return datagrams; |
2104 | ||
228e548e AB |
2105 | return err; |
2106 | } | |
2107 | ||
2108 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2109 | unsigned int, vlen, unsigned int, flags) | |
2110 | { | |
2111 | return __sys_sendmmsg(fd, mmsg, vlen, flags); | |
2112 | } | |
2113 | ||
a2e27255 | 2114 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2115 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2116 | { |
89bddce5 SH |
2117 | struct compat_msghdr __user *msg_compat = |
2118 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2119 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2120 | struct iovec *iov = iovstack; |
1da177e4 | 2121 | unsigned long cmsg_ptr; |
a74e9106 | 2122 | int err, total_len, len; |
1da177e4 LT |
2123 | |
2124 | /* kernel mode address */ | |
230b1839 | 2125 | struct sockaddr_storage addr; |
1da177e4 LT |
2126 | |
2127 | /* user mode address pointers */ | |
2128 | struct sockaddr __user *uaddr; | |
2129 | int __user *uaddr_len; | |
89bddce5 | 2130 | |
1da177e4 | 2131 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2132 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2133 | return -EFAULT; |
c6d409cf | 2134 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 2135 | return -EFAULT; |
1da177e4 | 2136 | |
a2e27255 | 2137 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2138 | err = -EMSGSIZE; |
2139 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2140 | goto out; | |
2141 | err = -ENOMEM; | |
2142 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2143 | GFP_KERNEL); | |
1da177e4 | 2144 | if (!iov) |
a2e27255 | 2145 | goto out; |
1da177e4 LT |
2146 | } |
2147 | ||
2148 | /* | |
89bddce5 SH |
2149 | * Save the user-mode address (verify_iovec will change the |
2150 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2151 | */ |
89bddce5 | 2152 | |
a2e27255 | 2153 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2154 | uaddr_len = COMPAT_NAMELEN(msg); |
2155 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2156 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 | 2157 | } else |
43db362d | 2158 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2159 | if (err < 0) |
2160 | goto out_freeiov; | |
89bddce5 | 2161 | total_len = err; |
1da177e4 | 2162 | |
a2e27255 ACM |
2163 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2164 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2165 | |
1da177e4 LT |
2166 | if (sock->file->f_flags & O_NONBLOCK) |
2167 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2168 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2169 | total_len, flags); | |
1da177e4 LT |
2170 | if (err < 0) |
2171 | goto out_freeiov; | |
2172 | len = err; | |
2173 | ||
2174 | if (uaddr != NULL) { | |
43db362d | 2175 | err = move_addr_to_user(&addr, |
a2e27255 | 2176 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2177 | uaddr_len); |
1da177e4 LT |
2178 | if (err < 0) |
2179 | goto out_freeiov; | |
2180 | } | |
a2e27255 | 2181 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2182 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2183 | if (err) |
2184 | goto out_freeiov; | |
2185 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2186 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2187 | &msg_compat->msg_controllen); |
2188 | else | |
a2e27255 | 2189 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2190 | &msg->msg_controllen); |
2191 | if (err) | |
2192 | goto out_freeiov; | |
2193 | err = len; | |
2194 | ||
2195 | out_freeiov: | |
2196 | if (iov != iovstack) | |
a74e9106 | 2197 | kfree(iov); |
a2e27255 ACM |
2198 | out: |
2199 | return err; | |
2200 | } | |
2201 | ||
2202 | /* | |
2203 | * BSD recvmsg interface | |
2204 | */ | |
2205 | ||
2206 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2207 | unsigned int, flags) | |
2208 | { | |
2209 | int fput_needed, err; | |
2210 | struct msghdr msg_sys; | |
2211 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2212 | ||
2213 | if (!sock) | |
2214 | goto out; | |
2215 | ||
2216 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2217 | ||
6cb153ca | 2218 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2219 | out: |
2220 | return err; | |
2221 | } | |
2222 | ||
a2e27255 ACM |
2223 | /* |
2224 | * Linux recvmmsg interface | |
2225 | */ | |
2226 | ||
2227 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2228 | unsigned int flags, struct timespec *timeout) | |
2229 | { | |
2230 | int fput_needed, err, datagrams; | |
2231 | struct socket *sock; | |
2232 | struct mmsghdr __user *entry; | |
d7256d0e | 2233 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2234 | struct msghdr msg_sys; |
2235 | struct timespec end_time; | |
2236 | ||
2237 | if (timeout && | |
2238 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2239 | timeout->tv_nsec)) | |
2240 | return -EINVAL; | |
2241 | ||
2242 | datagrams = 0; | |
2243 | ||
2244 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2245 | if (!sock) | |
2246 | return err; | |
2247 | ||
2248 | err = sock_error(sock->sk); | |
2249 | if (err) | |
2250 | goto out_put; | |
2251 | ||
2252 | entry = mmsg; | |
d7256d0e | 2253 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2254 | |
2255 | while (datagrams < vlen) { | |
2256 | /* | |
2257 | * No need to ask LSM for more than the first datagram. | |
2258 | */ | |
d7256d0e JMG |
2259 | if (MSG_CMSG_COMPAT & flags) { |
2260 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
b9eb8b87 AB |
2261 | &msg_sys, flags & ~MSG_WAITFORONE, |
2262 | datagrams); | |
d7256d0e JMG |
2263 | if (err < 0) |
2264 | break; | |
2265 | err = __put_user(err, &compat_entry->msg_len); | |
2266 | ++compat_entry; | |
2267 | } else { | |
2268 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
b9eb8b87 AB |
2269 | &msg_sys, flags & ~MSG_WAITFORONE, |
2270 | datagrams); | |
d7256d0e JMG |
2271 | if (err < 0) |
2272 | break; | |
2273 | err = put_user(err, &entry->msg_len); | |
2274 | ++entry; | |
2275 | } | |
2276 | ||
a2e27255 ACM |
2277 | if (err) |
2278 | break; | |
a2e27255 ACM |
2279 | ++datagrams; |
2280 | ||
71c5c159 BB |
2281 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2282 | if (flags & MSG_WAITFORONE) | |
2283 | flags |= MSG_DONTWAIT; | |
2284 | ||
a2e27255 ACM |
2285 | if (timeout) { |
2286 | ktime_get_ts(timeout); | |
2287 | *timeout = timespec_sub(end_time, *timeout); | |
2288 | if (timeout->tv_sec < 0) { | |
2289 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2290 | break; | |
2291 | } | |
2292 | ||
2293 | /* Timeout, return less than vlen datagrams */ | |
2294 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2295 | break; | |
2296 | } | |
2297 | ||
2298 | /* Out of band data, return right away */ | |
2299 | if (msg_sys.msg_flags & MSG_OOB) | |
2300 | break; | |
2301 | } | |
2302 | ||
2303 | out_put: | |
2304 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2305 | |
a2e27255 ACM |
2306 | if (err == 0) |
2307 | return datagrams; | |
2308 | ||
2309 | if (datagrams != 0) { | |
2310 | /* | |
2311 | * We may return less entries than requested (vlen) if the | |
2312 | * sock is non block and there aren't enough datagrams... | |
2313 | */ | |
2314 | if (err != -EAGAIN) { | |
2315 | /* | |
2316 | * ... or if recvmsg returns an error after we | |
2317 | * received some datagrams, where we record the | |
2318 | * error to return on the next call or if the | |
2319 | * app asks about it using getsockopt(SO_ERROR). | |
2320 | */ | |
2321 | sock->sk->sk_err = -err; | |
2322 | } | |
2323 | ||
2324 | return datagrams; | |
2325 | } | |
2326 | ||
2327 | return err; | |
2328 | } | |
2329 | ||
2330 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2331 | unsigned int, vlen, unsigned int, flags, | |
2332 | struct timespec __user *, timeout) | |
2333 | { | |
2334 | int datagrams; | |
2335 | struct timespec timeout_sys; | |
2336 | ||
2337 | if (!timeout) | |
2338 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2339 | ||
2340 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2341 | return -EFAULT; | |
2342 | ||
2343 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2344 | ||
2345 | if (datagrams > 0 && | |
2346 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2347 | datagrams = -EFAULT; | |
2348 | ||
2349 | return datagrams; | |
2350 | } | |
2351 | ||
2352 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2353 | /* Argument list sizes for sys_socketcall */ |
2354 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2355 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2356 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2357 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2358 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2359 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2360 | }; |
2361 | ||
1da177e4 LT |
2362 | #undef AL |
2363 | ||
2364 | /* | |
89bddce5 | 2365 | * System call vectors. |
1da177e4 LT |
2366 | * |
2367 | * Argument checking cleaned up. Saved 20% in size. | |
2368 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2369 | * it is set by the callees. |
1da177e4 LT |
2370 | */ |
2371 | ||
3e0fa65f | 2372 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2373 | { |
2374 | unsigned long a[6]; | |
89bddce5 | 2375 | unsigned long a0, a1; |
1da177e4 | 2376 | int err; |
47379052 | 2377 | unsigned int len; |
1da177e4 | 2378 | |
228e548e | 2379 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2380 | return -EINVAL; |
2381 | ||
47379052 AV |
2382 | len = nargs[call]; |
2383 | if (len > sizeof(a)) | |
2384 | return -EINVAL; | |
2385 | ||
1da177e4 | 2386 | /* copy_from_user should be SMP safe. */ |
47379052 | 2387 | if (copy_from_user(a, args, len)) |
1da177e4 | 2388 | return -EFAULT; |
3ec3b2fb | 2389 | |
f3298dc4 | 2390 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2391 | |
89bddce5 SH |
2392 | a0 = a[0]; |
2393 | a1 = a[1]; | |
2394 | ||
2395 | switch (call) { | |
2396 | case SYS_SOCKET: | |
2397 | err = sys_socket(a0, a1, a[2]); | |
2398 | break; | |
2399 | case SYS_BIND: | |
2400 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2401 | break; | |
2402 | case SYS_CONNECT: | |
2403 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2404 | break; | |
2405 | case SYS_LISTEN: | |
2406 | err = sys_listen(a0, a1); | |
2407 | break; | |
2408 | case SYS_ACCEPT: | |
de11defe UD |
2409 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2410 | (int __user *)a[2], 0); | |
89bddce5 SH |
2411 | break; |
2412 | case SYS_GETSOCKNAME: | |
2413 | err = | |
2414 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2415 | (int __user *)a[2]); | |
2416 | break; | |
2417 | case SYS_GETPEERNAME: | |
2418 | err = | |
2419 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2420 | (int __user *)a[2]); | |
2421 | break; | |
2422 | case SYS_SOCKETPAIR: | |
2423 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2424 | break; | |
2425 | case SYS_SEND: | |
2426 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2427 | break; | |
2428 | case SYS_SENDTO: | |
2429 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2430 | (struct sockaddr __user *)a[4], a[5]); | |
2431 | break; | |
2432 | case SYS_RECV: | |
2433 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2434 | break; | |
2435 | case SYS_RECVFROM: | |
2436 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2437 | (struct sockaddr __user *)a[4], | |
2438 | (int __user *)a[5]); | |
2439 | break; | |
2440 | case SYS_SHUTDOWN: | |
2441 | err = sys_shutdown(a0, a1); | |
2442 | break; | |
2443 | case SYS_SETSOCKOPT: | |
2444 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2445 | break; | |
2446 | case SYS_GETSOCKOPT: | |
2447 | err = | |
2448 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2449 | (int __user *)a[4]); | |
2450 | break; | |
2451 | case SYS_SENDMSG: | |
2452 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2453 | break; | |
228e548e AB |
2454 | case SYS_SENDMMSG: |
2455 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2456 | break; | |
89bddce5 SH |
2457 | case SYS_RECVMSG: |
2458 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2459 | break; | |
a2e27255 ACM |
2460 | case SYS_RECVMMSG: |
2461 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2462 | (struct timespec __user *)a[4]); | |
2463 | break; | |
de11defe UD |
2464 | case SYS_ACCEPT4: |
2465 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2466 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2467 | break; |
89bddce5 SH |
2468 | default: |
2469 | err = -EINVAL; | |
2470 | break; | |
1da177e4 LT |
2471 | } |
2472 | return err; | |
2473 | } | |
2474 | ||
89bddce5 | 2475 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2476 | |
55737fda SH |
2477 | /** |
2478 | * sock_register - add a socket protocol handler | |
2479 | * @ops: description of protocol | |
2480 | * | |
1da177e4 LT |
2481 | * This function is called by a protocol handler that wants to |
2482 | * advertise its address family, and have it linked into the | |
55737fda SH |
2483 | * socket interface. The value ops->family coresponds to the |
2484 | * socket system call protocol family. | |
1da177e4 | 2485 | */ |
f0fd27d4 | 2486 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2487 | { |
2488 | int err; | |
2489 | ||
2490 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2491 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2492 | NPROTO); | |
1da177e4 LT |
2493 | return -ENOBUFS; |
2494 | } | |
55737fda SH |
2495 | |
2496 | spin_lock(&net_family_lock); | |
190683a9 ED |
2497 | if (rcu_dereference_protected(net_families[ops->family], |
2498 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2499 | err = -EEXIST; |
2500 | else { | |
cf778b00 | 2501 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2502 | err = 0; |
2503 | } | |
55737fda SH |
2504 | spin_unlock(&net_family_lock); |
2505 | ||
89bddce5 | 2506 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2507 | return err; |
2508 | } | |
c6d409cf | 2509 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2510 | |
55737fda SH |
2511 | /** |
2512 | * sock_unregister - remove a protocol handler | |
2513 | * @family: protocol family to remove | |
2514 | * | |
1da177e4 LT |
2515 | * This function is called by a protocol handler that wants to |
2516 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2517 | * new socket creation. |
2518 | * | |
2519 | * If protocol handler is a module, then it can use module reference | |
2520 | * counts to protect against new references. If protocol handler is not | |
2521 | * a module then it needs to provide its own protection in | |
2522 | * the ops->create routine. | |
1da177e4 | 2523 | */ |
f0fd27d4 | 2524 | void sock_unregister(int family) |
1da177e4 | 2525 | { |
f0fd27d4 | 2526 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2527 | |
55737fda | 2528 | spin_lock(&net_family_lock); |
a9b3cd7f | 2529 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2530 | spin_unlock(&net_family_lock); |
2531 | ||
2532 | synchronize_rcu(); | |
2533 | ||
89bddce5 | 2534 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2535 | } |
c6d409cf | 2536 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2537 | |
77d76ea3 | 2538 | static int __init sock_init(void) |
1da177e4 | 2539 | { |
b3e19d92 | 2540 | int err; |
2ca794e5 EB |
2541 | /* |
2542 | * Initialize the network sysctl infrastructure. | |
2543 | */ | |
2544 | err = net_sysctl_init(); | |
2545 | if (err) | |
2546 | goto out; | |
b3e19d92 | 2547 | |
1da177e4 | 2548 | /* |
89bddce5 | 2549 | * Initialize sock SLAB cache. |
1da177e4 | 2550 | */ |
89bddce5 | 2551 | |
1da177e4 LT |
2552 | sk_init(); |
2553 | ||
1da177e4 | 2554 | /* |
89bddce5 | 2555 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2556 | */ |
2557 | skb_init(); | |
1da177e4 LT |
2558 | |
2559 | /* | |
89bddce5 | 2560 | * Initialize the protocols module. |
1da177e4 LT |
2561 | */ |
2562 | ||
2563 | init_inodecache(); | |
b3e19d92 NP |
2564 | |
2565 | err = register_filesystem(&sock_fs_type); | |
2566 | if (err) | |
2567 | goto out_fs; | |
1da177e4 | 2568 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2569 | if (IS_ERR(sock_mnt)) { |
2570 | err = PTR_ERR(sock_mnt); | |
2571 | goto out_mount; | |
2572 | } | |
77d76ea3 AK |
2573 | |
2574 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2575 | */ |
2576 | ||
2577 | #ifdef CONFIG_NETFILTER | |
2578 | netfilter_init(); | |
2579 | #endif | |
cbeb321a | 2580 | |
c1f19b51 RC |
2581 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2582 | skb_timestamping_init(); | |
2583 | #endif | |
2584 | ||
b3e19d92 NP |
2585 | out: |
2586 | return err; | |
2587 | ||
2588 | out_mount: | |
2589 | unregister_filesystem(&sock_fs_type); | |
2590 | out_fs: | |
2591 | goto out; | |
1da177e4 LT |
2592 | } |
2593 | ||
77d76ea3 AK |
2594 | core_initcall(sock_init); /* early initcall */ |
2595 | ||
1da177e4 LT |
2596 | #ifdef CONFIG_PROC_FS |
2597 | void socket_seq_show(struct seq_file *seq) | |
2598 | { | |
2599 | int cpu; | |
2600 | int counter = 0; | |
2601 | ||
6f912042 | 2602 | for_each_possible_cpu(cpu) |
89bddce5 | 2603 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2604 | |
2605 | /* It can be negative, by the way. 8) */ | |
2606 | if (counter < 0) | |
2607 | counter = 0; | |
2608 | ||
2609 | seq_printf(seq, "sockets: used %d\n", counter); | |
2610 | } | |
89bddce5 | 2611 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2612 | |
89bbfc95 | 2613 | #ifdef CONFIG_COMPAT |
6b96018b | 2614 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2615 | unsigned int cmd, void __user *up) |
7a229387 | 2616 | { |
7a229387 AB |
2617 | mm_segment_t old_fs = get_fs(); |
2618 | struct timeval ktv; | |
2619 | int err; | |
2620 | ||
2621 | set_fs(KERNEL_DS); | |
6b96018b | 2622 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2623 | set_fs(old_fs); |
644595f8 | 2624 | if (!err) |
ed6fe9d6 | 2625 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2626 | |
7a229387 AB |
2627 | return err; |
2628 | } | |
2629 | ||
6b96018b | 2630 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2631 | unsigned int cmd, void __user *up) |
7a229387 | 2632 | { |
7a229387 AB |
2633 | mm_segment_t old_fs = get_fs(); |
2634 | struct timespec kts; | |
2635 | int err; | |
2636 | ||
2637 | set_fs(KERNEL_DS); | |
6b96018b | 2638 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2639 | set_fs(old_fs); |
644595f8 | 2640 | if (!err) |
ed6fe9d6 | 2641 | err = compat_put_timespec(&kts, up); |
644595f8 | 2642 | |
7a229387 AB |
2643 | return err; |
2644 | } | |
2645 | ||
6b96018b | 2646 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2647 | { |
2648 | struct ifreq __user *uifr; | |
2649 | int err; | |
2650 | ||
2651 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2652 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2653 | return -EFAULT; |
2654 | ||
6b96018b | 2655 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2656 | if (err) |
2657 | return err; | |
2658 | ||
6b96018b | 2659 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2660 | return -EFAULT; |
2661 | ||
2662 | return 0; | |
2663 | } | |
2664 | ||
6b96018b | 2665 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2666 | { |
6b96018b | 2667 | struct compat_ifconf ifc32; |
7a229387 AB |
2668 | struct ifconf ifc; |
2669 | struct ifconf __user *uifc; | |
6b96018b | 2670 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2671 | struct ifreq __user *ifr; |
2672 | unsigned int i, j; | |
2673 | int err; | |
2674 | ||
6b96018b | 2675 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2676 | return -EFAULT; |
2677 | ||
43da5f2e | 2678 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2679 | if (ifc32.ifcbuf == 0) { |
2680 | ifc32.ifc_len = 0; | |
2681 | ifc.ifc_len = 0; | |
2682 | ifc.ifc_req = NULL; | |
2683 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2684 | } else { | |
c6d409cf ED |
2685 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2686 | sizeof(struct ifreq); | |
7a229387 AB |
2687 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2688 | ifc.ifc_len = len; | |
2689 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2690 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2691 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2692 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2693 | return -EFAULT; |
2694 | ifr++; | |
2695 | ifr32++; | |
2696 | } | |
2697 | } | |
2698 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2699 | return -EFAULT; | |
2700 | ||
6b96018b | 2701 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2702 | if (err) |
2703 | return err; | |
2704 | ||
2705 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2706 | return -EFAULT; | |
2707 | ||
2708 | ifr = ifc.ifc_req; | |
2709 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2710 | for (i = 0, j = 0; | |
c6d409cf ED |
2711 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2712 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2713 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2714 | return -EFAULT; |
2715 | ifr32++; | |
2716 | ifr++; | |
2717 | } | |
2718 | ||
2719 | if (ifc32.ifcbuf == 0) { | |
2720 | /* Translate from 64-bit structure multiple to | |
2721 | * a 32-bit one. | |
2722 | */ | |
2723 | i = ifc.ifc_len; | |
6b96018b | 2724 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2725 | ifc32.ifc_len = i; |
2726 | } else { | |
2727 | ifc32.ifc_len = i; | |
2728 | } | |
6b96018b | 2729 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2730 | return -EFAULT; |
2731 | ||
2732 | return 0; | |
2733 | } | |
2734 | ||
6b96018b | 2735 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2736 | { |
3a7da39d BH |
2737 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2738 | bool convert_in = false, convert_out = false; | |
2739 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2740 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2741 | struct ifreq __user *ifr; |
3a7da39d BH |
2742 | u32 rule_cnt = 0, actual_rule_cnt; |
2743 | u32 ethcmd; | |
7a229387 | 2744 | u32 data; |
3a7da39d | 2745 | int ret; |
7a229387 | 2746 | |
3a7da39d BH |
2747 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2748 | return -EFAULT; | |
7a229387 | 2749 | |
3a7da39d BH |
2750 | compat_rxnfc = compat_ptr(data); |
2751 | ||
2752 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2753 | return -EFAULT; |
2754 | ||
3a7da39d BH |
2755 | /* Most ethtool structures are defined without padding. |
2756 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2757 | */ | |
2758 | switch (ethcmd) { | |
2759 | default: | |
2760 | break; | |
2761 | case ETHTOOL_GRXCLSRLALL: | |
2762 | /* Buffer size is variable */ | |
2763 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2764 | return -EFAULT; | |
2765 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2766 | return -ENOMEM; | |
2767 | buf_size += rule_cnt * sizeof(u32); | |
2768 | /* fall through */ | |
2769 | case ETHTOOL_GRXRINGS: | |
2770 | case ETHTOOL_GRXCLSRLCNT: | |
2771 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2772 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2773 | convert_out = true; |
2774 | /* fall through */ | |
2775 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2776 | buf_size += sizeof(struct ethtool_rxnfc); |
2777 | convert_in = true; | |
2778 | break; | |
2779 | } | |
2780 | ||
2781 | ifr = compat_alloc_user_space(buf_size); | |
2782 | rxnfc = (void *)ifr + ALIGN(sizeof(struct ifreq), 8); | |
2783 | ||
2784 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2785 | return -EFAULT; |
2786 | ||
3a7da39d BH |
2787 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2788 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2789 | return -EFAULT; |
2790 | ||
3a7da39d | 2791 | if (convert_in) { |
127fe533 | 2792 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2793 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2794 | */ | |
127fe533 AD |
2795 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2796 | sizeof(compat_rxnfc->fs.m_ext) != | |
2797 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2798 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2799 | BUILD_BUG_ON( |
2800 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2801 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2802 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2803 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2804 | ||
2805 | if (copy_in_user(rxnfc, compat_rxnfc, | |
127fe533 | 2806 | (void *)(&rxnfc->fs.m_ext + 1) - |
3a7da39d BH |
2807 | (void *)rxnfc) || |
2808 | copy_in_user(&rxnfc->fs.ring_cookie, | |
2809 | &compat_rxnfc->fs.ring_cookie, | |
2810 | (void *)(&rxnfc->fs.location + 1) - | |
2811 | (void *)&rxnfc->fs.ring_cookie) || | |
2812 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, | |
2813 | sizeof(rxnfc->rule_cnt))) | |
2814 | return -EFAULT; | |
2815 | } | |
2816 | ||
2817 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2818 | if (ret) | |
2819 | return ret; | |
2820 | ||
2821 | if (convert_out) { | |
2822 | if (copy_in_user(compat_rxnfc, rxnfc, | |
127fe533 | 2823 | (const void *)(&rxnfc->fs.m_ext + 1) - |
3a7da39d BH |
2824 | (const void *)rxnfc) || |
2825 | copy_in_user(&compat_rxnfc->fs.ring_cookie, | |
2826 | &rxnfc->fs.ring_cookie, | |
2827 | (const void *)(&rxnfc->fs.location + 1) - | |
2828 | (const void *)&rxnfc->fs.ring_cookie) || | |
2829 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, | |
2830 | sizeof(rxnfc->rule_cnt))) | |
2831 | return -EFAULT; | |
2832 | ||
2833 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2834 | /* As an optimisation, we only copy the actual | |
2835 | * number of rules that the underlying | |
2836 | * function returned. Since Mallory might | |
2837 | * change the rule count in user memory, we | |
2838 | * check that it is less than the rule count | |
2839 | * originally given (as the user buffer size), | |
2840 | * which has been range-checked. | |
2841 | */ | |
2842 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2843 | return -EFAULT; | |
2844 | if (actual_rule_cnt < rule_cnt) | |
2845 | rule_cnt = actual_rule_cnt; | |
2846 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2847 | &rxnfc->rule_locs[0], | |
2848 | rule_cnt * sizeof(u32))) | |
2849 | return -EFAULT; | |
2850 | } | |
2851 | } | |
2852 | ||
2853 | return 0; | |
7a229387 AB |
2854 | } |
2855 | ||
7a50a240 AB |
2856 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2857 | { | |
2858 | void __user *uptr; | |
2859 | compat_uptr_t uptr32; | |
2860 | struct ifreq __user *uifr; | |
2861 | ||
c6d409cf | 2862 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2863 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2864 | return -EFAULT; | |
2865 | ||
2866 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2867 | return -EFAULT; | |
2868 | ||
2869 | uptr = compat_ptr(uptr32); | |
2870 | ||
2871 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2872 | return -EFAULT; | |
2873 | ||
2874 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2875 | } | |
2876 | ||
6b96018b AB |
2877 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2878 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2879 | { |
2880 | struct ifreq kifr; | |
2881 | struct ifreq __user *uifr; | |
7a229387 AB |
2882 | mm_segment_t old_fs; |
2883 | int err; | |
2884 | u32 data; | |
2885 | void __user *datap; | |
2886 | ||
2887 | switch (cmd) { | |
2888 | case SIOCBONDENSLAVE: | |
2889 | case SIOCBONDRELEASE: | |
2890 | case SIOCBONDSETHWADDR: | |
2891 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2892 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2893 | return -EFAULT; |
2894 | ||
2895 | old_fs = get_fs(); | |
c6d409cf | 2896 | set_fs(KERNEL_DS); |
c3f52ae6 | 2897 | err = dev_ioctl(net, cmd, |
2898 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2899 | set_fs(old_fs); |
7a229387 AB |
2900 | |
2901 | return err; | |
2902 | case SIOCBONDSLAVEINFOQUERY: | |
2903 | case SIOCBONDINFOQUERY: | |
2904 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2905 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2906 | return -EFAULT; | |
2907 | ||
2908 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2909 | return -EFAULT; | |
2910 | ||
2911 | datap = compat_ptr(data); | |
2912 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2913 | return -EFAULT; | |
2914 | ||
6b96018b | 2915 | return dev_ioctl(net, cmd, uifr); |
7a229387 | 2916 | default: |
07d106d0 | 2917 | return -ENOIOCTLCMD; |
ccbd6a5a | 2918 | } |
7a229387 AB |
2919 | } |
2920 | ||
6b96018b AB |
2921 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2922 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2923 | { |
2924 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2925 | char tmp_buf[IFNAMSIZ]; |
2926 | void __user *data64; | |
2927 | u32 data32; | |
2928 | ||
2929 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2930 | IFNAMSIZ)) | |
2931 | return -EFAULT; | |
2932 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2933 | return -EFAULT; | |
2934 | data64 = compat_ptr(data32); | |
2935 | ||
2936 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2937 | ||
2938 | /* Don't check these user accesses, just let that get trapped | |
2939 | * in the ioctl handler instead. | |
2940 | */ | |
2941 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2942 | IFNAMSIZ)) | |
2943 | return -EFAULT; | |
2944 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2945 | return -EFAULT; | |
2946 | ||
6b96018b | 2947 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2948 | } |
2949 | ||
6b96018b AB |
2950 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2951 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2952 | { |
a2116ed2 | 2953 | struct ifreq __user *uifr; |
7a229387 AB |
2954 | int err; |
2955 | ||
a2116ed2 AB |
2956 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2957 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2958 | return -EFAULT; | |
2959 | ||
2960 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2961 | ||
7a229387 AB |
2962 | if (!err) { |
2963 | switch (cmd) { | |
2964 | case SIOCGIFFLAGS: | |
2965 | case SIOCGIFMETRIC: | |
2966 | case SIOCGIFMTU: | |
2967 | case SIOCGIFMEM: | |
2968 | case SIOCGIFHWADDR: | |
2969 | case SIOCGIFINDEX: | |
2970 | case SIOCGIFADDR: | |
2971 | case SIOCGIFBRDADDR: | |
2972 | case SIOCGIFDSTADDR: | |
2973 | case SIOCGIFNETMASK: | |
fab2532b | 2974 | case SIOCGIFPFLAGS: |
7a229387 | 2975 | case SIOCGIFTXQLEN: |
fab2532b AB |
2976 | case SIOCGMIIPHY: |
2977 | case SIOCGMIIREG: | |
a2116ed2 | 2978 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2979 | err = -EFAULT; |
2980 | break; | |
2981 | } | |
2982 | } | |
2983 | return err; | |
2984 | } | |
2985 | ||
a2116ed2 AB |
2986 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2987 | struct compat_ifreq __user *uifr32) | |
2988 | { | |
2989 | struct ifreq ifr; | |
2990 | struct compat_ifmap __user *uifmap32; | |
2991 | mm_segment_t old_fs; | |
2992 | int err; | |
2993 | ||
2994 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2995 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
2996 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2997 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2998 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2999 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3000 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3001 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
3002 | if (err) | |
3003 | return -EFAULT; | |
3004 | ||
3005 | old_fs = get_fs(); | |
c6d409cf | 3006 | set_fs(KERNEL_DS); |
c3f52ae6 | 3007 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3008 | set_fs(old_fs); |
a2116ed2 AB |
3009 | |
3010 | if (cmd == SIOCGIFMAP && !err) { | |
3011 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3012 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3013 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3014 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3015 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3016 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3017 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
3018 | if (err) | |
3019 | err = -EFAULT; | |
3020 | } | |
3021 | return err; | |
3022 | } | |
3023 | ||
3024 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
3025 | { | |
3026 | void __user *uptr; | |
3027 | compat_uptr_t uptr32; | |
3028 | struct ifreq __user *uifr; | |
3029 | ||
c6d409cf | 3030 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
a2116ed2 AB |
3031 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
3032 | return -EFAULT; | |
3033 | ||
3034 | if (get_user(uptr32, &uifr32->ifr_data)) | |
3035 | return -EFAULT; | |
3036 | ||
3037 | uptr = compat_ptr(uptr32); | |
3038 | ||
3039 | if (put_user(uptr, &uifr->ifr_data)) | |
3040 | return -EFAULT; | |
3041 | ||
3042 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
3043 | } | |
3044 | ||
7a229387 | 3045 | struct rtentry32 { |
c6d409cf | 3046 | u32 rt_pad1; |
7a229387 AB |
3047 | struct sockaddr rt_dst; /* target address */ |
3048 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3049 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3050 | unsigned short rt_flags; |
3051 | short rt_pad2; | |
3052 | u32 rt_pad3; | |
3053 | unsigned char rt_tos; | |
3054 | unsigned char rt_class; | |
3055 | short rt_pad4; | |
3056 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3057 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3058 | u32 rt_mtu; /* per route MTU/Window */ |
3059 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3060 | unsigned short rt_irtt; /* Initial RTT */ |
3061 | }; | |
3062 | ||
3063 | struct in6_rtmsg32 { | |
3064 | struct in6_addr rtmsg_dst; | |
3065 | struct in6_addr rtmsg_src; | |
3066 | struct in6_addr rtmsg_gateway; | |
3067 | u32 rtmsg_type; | |
3068 | u16 rtmsg_dst_len; | |
3069 | u16 rtmsg_src_len; | |
3070 | u32 rtmsg_metric; | |
3071 | u32 rtmsg_info; | |
3072 | u32 rtmsg_flags; | |
3073 | s32 rtmsg_ifindex; | |
3074 | }; | |
3075 | ||
6b96018b AB |
3076 | static int routing_ioctl(struct net *net, struct socket *sock, |
3077 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3078 | { |
3079 | int ret; | |
3080 | void *r = NULL; | |
3081 | struct in6_rtmsg r6; | |
3082 | struct rtentry r4; | |
3083 | char devname[16]; | |
3084 | u32 rtdev; | |
3085 | mm_segment_t old_fs = get_fs(); | |
3086 | ||
6b96018b AB |
3087 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3088 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3089 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3090 | 3 * sizeof(struct in6_addr)); |
c6d409cf ED |
3091 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3092 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3093 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3094 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3095 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3096 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3097 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3098 | |
3099 | r = (void *) &r6; | |
3100 | } else { /* ipv4 */ | |
6b96018b | 3101 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3102 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3103 | 3 * sizeof(struct sockaddr)); |
c6d409cf ED |
3104 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
3105 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3106 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3107 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
3108 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3109 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3110 | if (rtdev) { |
c6d409cf | 3111 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3112 | r4.rt_dev = (char __user __force *)devname; |
3113 | devname[15] = 0; | |
7a229387 AB |
3114 | } else |
3115 | r4.rt_dev = NULL; | |
3116 | ||
3117 | r = (void *) &r4; | |
3118 | } | |
3119 | ||
3120 | if (ret) { | |
3121 | ret = -EFAULT; | |
3122 | goto out; | |
3123 | } | |
3124 | ||
c6d409cf | 3125 | set_fs(KERNEL_DS); |
6b96018b | 3126 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3127 | set_fs(old_fs); |
7a229387 AB |
3128 | |
3129 | out: | |
7a229387 AB |
3130 | return ret; |
3131 | } | |
3132 | ||
3133 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3134 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3135 | * use compatible ioctls |
7a229387 | 3136 | */ |
6b96018b | 3137 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3138 | { |
6b96018b | 3139 | compat_ulong_t tmp; |
7a229387 | 3140 | |
6b96018b | 3141 | if (get_user(tmp, argp)) |
7a229387 AB |
3142 | return -EFAULT; |
3143 | if (tmp == BRCTL_GET_VERSION) | |
3144 | return BRCTL_VERSION + 1; | |
3145 | return -EINVAL; | |
3146 | } | |
3147 | ||
6b96018b AB |
3148 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3149 | unsigned int cmd, unsigned long arg) | |
3150 | { | |
3151 | void __user *argp = compat_ptr(arg); | |
3152 | struct sock *sk = sock->sk; | |
3153 | struct net *net = sock_net(sk); | |
7a229387 | 3154 | |
6b96018b AB |
3155 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
3156 | return siocdevprivate_ioctl(net, cmd, argp); | |
3157 | ||
3158 | switch (cmd) { | |
3159 | case SIOCSIFBR: | |
3160 | case SIOCGIFBR: | |
3161 | return old_bridge_ioctl(argp); | |
3162 | case SIOCGIFNAME: | |
3163 | return dev_ifname32(net, argp); | |
3164 | case SIOCGIFCONF: | |
3165 | return dev_ifconf(net, argp); | |
3166 | case SIOCETHTOOL: | |
3167 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3168 | case SIOCWANDEV: |
3169 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3170 | case SIOCGIFMAP: |
3171 | case SIOCSIFMAP: | |
3172 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3173 | case SIOCBONDENSLAVE: |
3174 | case SIOCBONDRELEASE: | |
3175 | case SIOCBONDSETHWADDR: | |
3176 | case SIOCBONDSLAVEINFOQUERY: | |
3177 | case SIOCBONDINFOQUERY: | |
3178 | case SIOCBONDCHANGEACTIVE: | |
3179 | return bond_ioctl(net, cmd, argp); | |
3180 | case SIOCADDRT: | |
3181 | case SIOCDELRT: | |
3182 | return routing_ioctl(net, sock, cmd, argp); | |
3183 | case SIOCGSTAMP: | |
3184 | return do_siocgstamp(net, sock, cmd, argp); | |
3185 | case SIOCGSTAMPNS: | |
3186 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
3187 | case SIOCSHWTSTAMP: |
3188 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
3189 | |
3190 | case FIOSETOWN: | |
3191 | case SIOCSPGRP: | |
3192 | case FIOGETOWN: | |
3193 | case SIOCGPGRP: | |
3194 | case SIOCBRADDBR: | |
3195 | case SIOCBRDELBR: | |
3196 | case SIOCGIFVLAN: | |
3197 | case SIOCSIFVLAN: | |
3198 | case SIOCADDDLCI: | |
3199 | case SIOCDELDLCI: | |
3200 | return sock_ioctl(file, cmd, arg); | |
3201 | ||
3202 | case SIOCGIFFLAGS: | |
3203 | case SIOCSIFFLAGS: | |
3204 | case SIOCGIFMETRIC: | |
3205 | case SIOCSIFMETRIC: | |
3206 | case SIOCGIFMTU: | |
3207 | case SIOCSIFMTU: | |
3208 | case SIOCGIFMEM: | |
3209 | case SIOCSIFMEM: | |
3210 | case SIOCGIFHWADDR: | |
3211 | case SIOCSIFHWADDR: | |
3212 | case SIOCADDMULTI: | |
3213 | case SIOCDELMULTI: | |
3214 | case SIOCGIFINDEX: | |
6b96018b AB |
3215 | case SIOCGIFADDR: |
3216 | case SIOCSIFADDR: | |
3217 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3218 | case SIOCDIFADDR: |
6b96018b AB |
3219 | case SIOCGIFBRDADDR: |
3220 | case SIOCSIFBRDADDR: | |
3221 | case SIOCGIFDSTADDR: | |
3222 | case SIOCSIFDSTADDR: | |
3223 | case SIOCGIFNETMASK: | |
3224 | case SIOCSIFNETMASK: | |
3225 | case SIOCSIFPFLAGS: | |
3226 | case SIOCGIFPFLAGS: | |
3227 | case SIOCGIFTXQLEN: | |
3228 | case SIOCSIFTXQLEN: | |
3229 | case SIOCBRADDIF: | |
3230 | case SIOCBRDELIF: | |
9177efd3 AB |
3231 | case SIOCSIFNAME: |
3232 | case SIOCGMIIPHY: | |
3233 | case SIOCGMIIREG: | |
3234 | case SIOCSMIIREG: | |
6b96018b | 3235 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3236 | |
6b96018b AB |
3237 | case SIOCSARP: |
3238 | case SIOCGARP: | |
3239 | case SIOCDARP: | |
6b96018b | 3240 | case SIOCATMARK: |
9177efd3 AB |
3241 | return sock_do_ioctl(net, sock, cmd, arg); |
3242 | } | |
3243 | ||
6b96018b AB |
3244 | return -ENOIOCTLCMD; |
3245 | } | |
7a229387 | 3246 | |
95c96174 | 3247 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3248 | unsigned long arg) |
89bbfc95 SP |
3249 | { |
3250 | struct socket *sock = file->private_data; | |
3251 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3252 | struct sock *sk; |
3253 | struct net *net; | |
3254 | ||
3255 | sk = sock->sk; | |
3256 | net = sock_net(sk); | |
89bbfc95 SP |
3257 | |
3258 | if (sock->ops->compat_ioctl) | |
3259 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3260 | ||
87de87d5 DM |
3261 | if (ret == -ENOIOCTLCMD && |
3262 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3263 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3264 | ||
6b96018b AB |
3265 | if (ret == -ENOIOCTLCMD) |
3266 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3267 | ||
89bbfc95 SP |
3268 | return ret; |
3269 | } | |
3270 | #endif | |
3271 | ||
ac5a488e SS |
3272 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3273 | { | |
3274 | return sock->ops->bind(sock, addr, addrlen); | |
3275 | } | |
c6d409cf | 3276 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3277 | |
3278 | int kernel_listen(struct socket *sock, int backlog) | |
3279 | { | |
3280 | return sock->ops->listen(sock, backlog); | |
3281 | } | |
c6d409cf | 3282 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3283 | |
3284 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3285 | { | |
3286 | struct sock *sk = sock->sk; | |
3287 | int err; | |
3288 | ||
3289 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3290 | newsock); | |
3291 | if (err < 0) | |
3292 | goto done; | |
3293 | ||
3294 | err = sock->ops->accept(sock, *newsock, flags); | |
3295 | if (err < 0) { | |
3296 | sock_release(*newsock); | |
fa8705b0 | 3297 | *newsock = NULL; |
ac5a488e SS |
3298 | goto done; |
3299 | } | |
3300 | ||
3301 | (*newsock)->ops = sock->ops; | |
1b08534e | 3302 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3303 | |
3304 | done: | |
3305 | return err; | |
3306 | } | |
c6d409cf | 3307 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3308 | |
3309 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3310 | int flags) |
ac5a488e SS |
3311 | { |
3312 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3313 | } | |
c6d409cf | 3314 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3315 | |
3316 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3317 | int *addrlen) | |
3318 | { | |
3319 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3320 | } | |
c6d409cf | 3321 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3322 | |
3323 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3324 | int *addrlen) | |
3325 | { | |
3326 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3327 | } | |
c6d409cf | 3328 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3329 | |
3330 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3331 | char *optval, int *optlen) | |
3332 | { | |
3333 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3334 | char __user *uoptval; |
3335 | int __user *uoptlen; | |
ac5a488e SS |
3336 | int err; |
3337 | ||
fb8621bb NK |
3338 | uoptval = (char __user __force *) optval; |
3339 | uoptlen = (int __user __force *) optlen; | |
3340 | ||
ac5a488e SS |
3341 | set_fs(KERNEL_DS); |
3342 | if (level == SOL_SOCKET) | |
fb8621bb | 3343 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3344 | else |
fb8621bb NK |
3345 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3346 | uoptlen); | |
ac5a488e SS |
3347 | set_fs(oldfs); |
3348 | return err; | |
3349 | } | |
c6d409cf | 3350 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3351 | |
3352 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3353 | char *optval, unsigned int optlen) |
ac5a488e SS |
3354 | { |
3355 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3356 | char __user *uoptval; |
ac5a488e SS |
3357 | int err; |
3358 | ||
fb8621bb NK |
3359 | uoptval = (char __user __force *) optval; |
3360 | ||
ac5a488e SS |
3361 | set_fs(KERNEL_DS); |
3362 | if (level == SOL_SOCKET) | |
fb8621bb | 3363 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3364 | else |
fb8621bb | 3365 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3366 | optlen); |
3367 | set_fs(oldfs); | |
3368 | return err; | |
3369 | } | |
c6d409cf | 3370 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3371 | |
3372 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3373 | size_t size, int flags) | |
3374 | { | |
f8451725 HX |
3375 | sock_update_classid(sock->sk); |
3376 | ||
ac5a488e SS |
3377 | if (sock->ops->sendpage) |
3378 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3379 | ||
3380 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3381 | } | |
c6d409cf | 3382 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3383 | |
3384 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3385 | { | |
3386 | mm_segment_t oldfs = get_fs(); | |
3387 | int err; | |
3388 | ||
3389 | set_fs(KERNEL_DS); | |
3390 | err = sock->ops->ioctl(sock, cmd, arg); | |
3391 | set_fs(oldfs); | |
3392 | ||
3393 | return err; | |
3394 | } | |
c6d409cf | 3395 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3396 | |
91cf45f0 TM |
3397 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3398 | { | |
3399 | return sock->ops->shutdown(sock, how); | |
3400 | } | |
91cf45f0 | 3401 | EXPORT_SYMBOL(kernel_sock_shutdown); |