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> |
1da177e4 LT |
90 | |
91 | #include <asm/uaccess.h> | |
92 | #include <asm/unistd.h> | |
93 | ||
94 | #include <net/compat.h> | |
87de87d5 | 95 | #include <net/wext.h> |
1da177e4 LT |
96 | |
97 | #include <net/sock.h> | |
98 | #include <linux/netfilter.h> | |
99 | ||
6b96018b AB |
100 | #include <linux/if_tun.h> |
101 | #include <linux/ipv6_route.h> | |
102 | #include <linux/route.h> | |
6b96018b AB |
103 | #include <linux/sockios.h> |
104 | #include <linux/atalk.h> | |
105 | ||
1da177e4 | 106 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
107 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
108 | unsigned long nr_segs, loff_t pos); | |
109 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
110 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 111 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
112 | |
113 | static int sock_close(struct inode *inode, struct file *file); | |
114 | static unsigned int sock_poll(struct file *file, | |
115 | struct poll_table_struct *wait); | |
89bddce5 | 116 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
117 | #ifdef CONFIG_COMPAT |
118 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 119 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 120 | #endif |
1da177e4 | 121 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
122 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
123 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c JA |
124 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
125 | struct pipe_inode_info *pipe, size_t len, | |
126 | unsigned int flags); | |
1da177e4 | 127 | |
1da177e4 LT |
128 | /* |
129 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
130 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
131 | */ | |
132 | ||
da7071d7 | 133 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
134 | .owner = THIS_MODULE, |
135 | .llseek = no_llseek, | |
136 | .aio_read = sock_aio_read, | |
137 | .aio_write = sock_aio_write, | |
138 | .poll = sock_poll, | |
139 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
140 | #ifdef CONFIG_COMPAT |
141 | .compat_ioctl = compat_sock_ioctl, | |
142 | #endif | |
1da177e4 LT |
143 | .mmap = sock_mmap, |
144 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
145 | .release = sock_close, | |
146 | .fasync = sock_fasync, | |
5274f052 JA |
147 | .sendpage = sock_sendpage, |
148 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 149 | .splice_read = sock_splice_read, |
1da177e4 LT |
150 | }; |
151 | ||
152 | /* | |
153 | * The protocol list. Each protocol is registered in here. | |
154 | */ | |
155 | ||
1da177e4 | 156 | static DEFINE_SPINLOCK(net_family_lock); |
f0fd27d4 | 157 | static const struct net_proto_family *net_families[NPROTO] __read_mostly; |
1da177e4 | 158 | |
1da177e4 LT |
159 | /* |
160 | * Statistics counters of the socket lists | |
161 | */ | |
162 | ||
163 | static DEFINE_PER_CPU(int, sockets_in_use) = 0; | |
164 | ||
165 | /* | |
89bddce5 SH |
166 | * Support routines. |
167 | * Move socket addresses back and forth across the kernel/user | |
168 | * divide and look after the messy bits. | |
1da177e4 LT |
169 | */ |
170 | ||
89bddce5 | 171 | #define MAX_SOCK_ADDR 128 /* 108 for Unix domain - |
1da177e4 LT |
172 | 16 for IP, 16 for IPX, |
173 | 24 for IPv6, | |
89bddce5 | 174 | about 80 for AX.25 |
1da177e4 LT |
175 | must be at least one bigger than |
176 | the AF_UNIX size (see net/unix/af_unix.c | |
89bddce5 | 177 | :unix_mkname()). |
1da177e4 | 178 | */ |
89bddce5 | 179 | |
1da177e4 LT |
180 | /** |
181 | * move_addr_to_kernel - copy a socket address into kernel space | |
182 | * @uaddr: Address in user space | |
183 | * @kaddr: Address in kernel space | |
184 | * @ulen: Length in user space | |
185 | * | |
186 | * The address is copied into kernel space. If the provided address is | |
187 | * too long an error code of -EINVAL is returned. If the copy gives | |
188 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
189 | */ | |
190 | ||
230b1839 | 191 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) |
1da177e4 | 192 | { |
230b1839 | 193 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 194 | return -EINVAL; |
89bddce5 | 195 | if (ulen == 0) |
1da177e4 | 196 | return 0; |
89bddce5 | 197 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 198 | return -EFAULT; |
3ec3b2fb | 199 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
200 | } |
201 | ||
202 | /** | |
203 | * move_addr_to_user - copy an address to user space | |
204 | * @kaddr: kernel space address | |
205 | * @klen: length of address in kernel | |
206 | * @uaddr: user space address | |
207 | * @ulen: pointer to user length field | |
208 | * | |
209 | * The value pointed to by ulen on entry is the buffer length available. | |
210 | * This is overwritten with the buffer space used. -EINVAL is returned | |
211 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
212 | * is returned if either the buffer or the length field are not | |
213 | * accessible. | |
214 | * After copying the data up to the limit the user specifies, the true | |
215 | * length of the data is written over the length limit the user | |
216 | * specified. Zero is returned for a success. | |
217 | */ | |
89bddce5 | 218 | |
230b1839 | 219 | int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, |
89bddce5 | 220 | int __user *ulen) |
1da177e4 LT |
221 | { |
222 | int err; | |
223 | int len; | |
224 | ||
89bddce5 SH |
225 | err = get_user(len, ulen); |
226 | if (err) | |
1da177e4 | 227 | return err; |
89bddce5 SH |
228 | if (len > klen) |
229 | len = klen; | |
230b1839 | 230 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 231 | return -EINVAL; |
89bddce5 | 232 | if (len) { |
d6fe3945 SG |
233 | if (audit_sockaddr(klen, kaddr)) |
234 | return -ENOMEM; | |
89bddce5 | 235 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
236 | return -EFAULT; |
237 | } | |
238 | /* | |
89bddce5 SH |
239 | * "fromlen shall refer to the value before truncation.." |
240 | * 1003.1g | |
1da177e4 LT |
241 | */ |
242 | return __put_user(klen, ulen); | |
243 | } | |
244 | ||
e18b890b | 245 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
246 | |
247 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
248 | { | |
249 | struct socket_alloc *ei; | |
89bddce5 | 250 | |
e94b1766 | 251 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
252 | if (!ei) |
253 | return NULL; | |
254 | init_waitqueue_head(&ei->socket.wait); | |
89bddce5 | 255 | |
1da177e4 LT |
256 | ei->socket.fasync_list = NULL; |
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 | { | |
268 | kmem_cache_free(sock_inode_cachep, | |
269 | container_of(inode, struct socket_alloc, vfs_inode)); | |
270 | } | |
271 | ||
51cc5068 | 272 | static void init_once(void *foo) |
1da177e4 | 273 | { |
89bddce5 | 274 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 275 | |
a35afb83 | 276 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 277 | } |
89bddce5 | 278 | |
1da177e4 LT |
279 | static int init_inodecache(void) |
280 | { | |
281 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
282 | sizeof(struct socket_alloc), |
283 | 0, | |
284 | (SLAB_HWCACHE_ALIGN | | |
285 | SLAB_RECLAIM_ACCOUNT | | |
286 | SLAB_MEM_SPREAD), | |
20c2df83 | 287 | init_once); |
1da177e4 LT |
288 | if (sock_inode_cachep == NULL) |
289 | return -ENOMEM; | |
290 | return 0; | |
291 | } | |
292 | ||
b87221de | 293 | static const struct super_operations sockfs_ops = { |
1da177e4 LT |
294 | .alloc_inode = sock_alloc_inode, |
295 | .destroy_inode =sock_destroy_inode, | |
296 | .statfs = simple_statfs, | |
297 | }; | |
298 | ||
454e2398 | 299 | static int sockfs_get_sb(struct file_system_type *fs_type, |
89bddce5 SH |
300 | int flags, const char *dev_name, void *data, |
301 | struct vfsmount *mnt) | |
1da177e4 | 302 | { |
454e2398 DH |
303 | return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC, |
304 | mnt); | |
1da177e4 LT |
305 | } |
306 | ||
ba89966c | 307 | static struct vfsmount *sock_mnt __read_mostly; |
1da177e4 LT |
308 | |
309 | static struct file_system_type sock_fs_type = { | |
310 | .name = "sockfs", | |
311 | .get_sb = sockfs_get_sb, | |
312 | .kill_sb = kill_anon_super, | |
313 | }; | |
89bddce5 | 314 | |
1da177e4 LT |
315 | static int sockfs_delete_dentry(struct dentry *dentry) |
316 | { | |
304e61e6 ED |
317 | /* |
318 | * At creation time, we pretended this dentry was hashed | |
319 | * (by clearing DCACHE_UNHASHED bit in d_flags) | |
320 | * At delete time, we restore the truth : not hashed. | |
321 | * (so that dput() can proceed correctly) | |
322 | */ | |
323 | dentry->d_flags |= DCACHE_UNHASHED; | |
324 | return 0; | |
1da177e4 | 325 | } |
c23fbb6b ED |
326 | |
327 | /* | |
328 | * sockfs_dname() is called from d_path(). | |
329 | */ | |
330 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
331 | { | |
332 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
333 | dentry->d_inode->i_ino); | |
334 | } | |
335 | ||
3ba13d17 | 336 | static const struct dentry_operations sockfs_dentry_operations = { |
89bddce5 | 337 | .d_delete = sockfs_delete_dentry, |
c23fbb6b | 338 | .d_dname = sockfs_dname, |
1da177e4 LT |
339 | }; |
340 | ||
341 | /* | |
342 | * Obtains the first available file descriptor and sets it up for use. | |
343 | * | |
39d8c1b6 DM |
344 | * These functions create file structures and maps them to fd space |
345 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
346 | * and file struct implicitly stored in sock->file. |
347 | * Note that another thread may close file descriptor before we return | |
348 | * from this function. We use the fact that now we do not refer | |
349 | * to socket after mapping. If one day we will need it, this | |
350 | * function will increment ref. count on file by 1. | |
351 | * | |
352 | * In any case returned fd MAY BE not valid! | |
353 | * This race condition is unavoidable | |
354 | * with shared fd spaces, we cannot solve it inside kernel, | |
355 | * but we take care of internal coherence yet. | |
356 | */ | |
357 | ||
a677a039 | 358 | static int sock_alloc_fd(struct file **filep, int flags) |
1da177e4 LT |
359 | { |
360 | int fd; | |
1da177e4 | 361 | |
a677a039 | 362 | fd = get_unused_fd_flags(flags); |
39d8c1b6 | 363 | if (likely(fd >= 0)) { |
1da177e4 LT |
364 | struct file *file = get_empty_filp(); |
365 | ||
39d8c1b6 DM |
366 | *filep = file; |
367 | if (unlikely(!file)) { | |
1da177e4 | 368 | put_unused_fd(fd); |
39d8c1b6 | 369 | return -ENFILE; |
1da177e4 | 370 | } |
39d8c1b6 DM |
371 | } else |
372 | *filep = NULL; | |
373 | return fd; | |
374 | } | |
1da177e4 | 375 | |
77d27200 | 376 | static int sock_attach_fd(struct socket *sock, struct file *file, int flags) |
39d8c1b6 | 377 | { |
ce8d2cdf | 378 | struct dentry *dentry; |
c23fbb6b | 379 | struct qstr name = { .name = "" }; |
39d8c1b6 | 380 | |
ce8d2cdf DH |
381 | dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); |
382 | if (unlikely(!dentry)) | |
39d8c1b6 DM |
383 | return -ENOMEM; |
384 | ||
ce8d2cdf | 385 | dentry->d_op = &sockfs_dentry_operations; |
304e61e6 ED |
386 | /* |
387 | * We dont want to push this dentry into global dentry hash table. | |
388 | * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED | |
389 | * This permits a working /proc/$pid/fd/XXX on sockets | |
390 | */ | |
ce8d2cdf DH |
391 | dentry->d_flags &= ~DCACHE_UNHASHED; |
392 | d_instantiate(dentry, SOCK_INODE(sock)); | |
39d8c1b6 DM |
393 | |
394 | sock->file = file; | |
ce8d2cdf DH |
395 | init_file(file, sock_mnt, dentry, FMODE_READ | FMODE_WRITE, |
396 | &socket_file_ops); | |
397 | SOCK_INODE(sock)->i_fop = &socket_file_ops; | |
77d27200 | 398 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
399 | file->f_pos = 0; |
400 | file->private_data = sock; | |
1da177e4 | 401 | |
39d8c1b6 DM |
402 | return 0; |
403 | } | |
404 | ||
a677a039 | 405 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
406 | { |
407 | struct file *newfile; | |
a677a039 | 408 | int fd = sock_alloc_fd(&newfile, flags); |
39d8c1b6 DM |
409 | |
410 | if (likely(fd >= 0)) { | |
77d27200 | 411 | int err = sock_attach_fd(sock, newfile, flags); |
39d8c1b6 DM |
412 | |
413 | if (unlikely(err < 0)) { | |
414 | put_filp(newfile); | |
1da177e4 | 415 | put_unused_fd(fd); |
39d8c1b6 | 416 | return err; |
1da177e4 | 417 | } |
39d8c1b6 | 418 | fd_install(fd, newfile); |
1da177e4 | 419 | } |
1da177e4 LT |
420 | return fd; |
421 | } | |
422 | ||
6cb153ca BL |
423 | static struct socket *sock_from_file(struct file *file, int *err) |
424 | { | |
6cb153ca BL |
425 | if (file->f_op == &socket_file_ops) |
426 | return file->private_data; /* set in sock_map_fd */ | |
427 | ||
23bb80d2 ED |
428 | *err = -ENOTSOCK; |
429 | return NULL; | |
6cb153ca BL |
430 | } |
431 | ||
1da177e4 LT |
432 | /** |
433 | * sockfd_lookup - Go from a file number to its socket slot | |
434 | * @fd: file handle | |
435 | * @err: pointer to an error code return | |
436 | * | |
437 | * The file handle passed in is locked and the socket it is bound | |
438 | * too is returned. If an error occurs the err pointer is overwritten | |
439 | * with a negative errno code and NULL is returned. The function checks | |
440 | * for both invalid handles and passing a handle which is not a socket. | |
441 | * | |
442 | * On a success the socket object pointer is returned. | |
443 | */ | |
444 | ||
445 | struct socket *sockfd_lookup(int fd, int *err) | |
446 | { | |
447 | struct file *file; | |
1da177e4 LT |
448 | struct socket *sock; |
449 | ||
89bddce5 SH |
450 | file = fget(fd); |
451 | if (!file) { | |
1da177e4 LT |
452 | *err = -EBADF; |
453 | return NULL; | |
454 | } | |
89bddce5 | 455 | |
6cb153ca BL |
456 | sock = sock_from_file(file, err); |
457 | if (!sock) | |
1da177e4 | 458 | fput(file); |
6cb153ca BL |
459 | return sock; |
460 | } | |
1da177e4 | 461 | |
6cb153ca BL |
462 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
463 | { | |
464 | struct file *file; | |
465 | struct socket *sock; | |
466 | ||
3672558c | 467 | *err = -EBADF; |
6cb153ca BL |
468 | file = fget_light(fd, fput_needed); |
469 | if (file) { | |
470 | sock = sock_from_file(file, err); | |
471 | if (sock) | |
472 | return sock; | |
473 | fput_light(file, *fput_needed); | |
1da177e4 | 474 | } |
6cb153ca | 475 | return NULL; |
1da177e4 LT |
476 | } |
477 | ||
478 | /** | |
479 | * sock_alloc - allocate a socket | |
89bddce5 | 480 | * |
1da177e4 LT |
481 | * Allocate a new inode and socket object. The two are bound together |
482 | * and initialised. The socket is then returned. If we are out of inodes | |
483 | * NULL is returned. | |
484 | */ | |
485 | ||
486 | static struct socket *sock_alloc(void) | |
487 | { | |
89bddce5 SH |
488 | struct inode *inode; |
489 | struct socket *sock; | |
1da177e4 LT |
490 | |
491 | inode = new_inode(sock_mnt->mnt_sb); | |
492 | if (!inode) | |
493 | return NULL; | |
494 | ||
495 | sock = SOCKET_I(inode); | |
496 | ||
29a020d3 | 497 | kmemcheck_annotate_bitfield(sock, type); |
89bddce5 | 498 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
499 | inode->i_uid = current_fsuid(); |
500 | inode->i_gid = current_fsgid(); | |
1da177e4 | 501 | |
4e69489a | 502 | percpu_add(sockets_in_use, 1); |
1da177e4 LT |
503 | return sock; |
504 | } | |
505 | ||
506 | /* | |
507 | * In theory you can't get an open on this inode, but /proc provides | |
508 | * a back door. Remember to keep it shut otherwise you'll let the | |
509 | * creepy crawlies in. | |
510 | */ | |
89bddce5 | 511 | |
1da177e4 LT |
512 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
513 | { | |
514 | return -ENXIO; | |
515 | } | |
516 | ||
4b6f5d20 | 517 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
518 | .owner = THIS_MODULE, |
519 | .open = sock_no_open, | |
520 | }; | |
521 | ||
522 | /** | |
523 | * sock_release - close a socket | |
524 | * @sock: socket to close | |
525 | * | |
526 | * The socket is released from the protocol stack if it has a release | |
527 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 528 | * an inode not a file. |
1da177e4 | 529 | */ |
89bddce5 | 530 | |
1da177e4 LT |
531 | void sock_release(struct socket *sock) |
532 | { | |
533 | if (sock->ops) { | |
534 | struct module *owner = sock->ops->owner; | |
535 | ||
536 | sock->ops->release(sock); | |
537 | sock->ops = NULL; | |
538 | module_put(owner); | |
539 | } | |
540 | ||
541 | if (sock->fasync_list) | |
542 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); | |
543 | ||
4e69489a | 544 | percpu_sub(sockets_in_use, 1); |
1da177e4 LT |
545 | if (!sock->file) { |
546 | iput(SOCK_INODE(sock)); | |
547 | return; | |
548 | } | |
89bddce5 | 549 | sock->file = NULL; |
1da177e4 LT |
550 | } |
551 | ||
20d49473 PO |
552 | int sock_tx_timestamp(struct msghdr *msg, struct sock *sk, |
553 | union skb_shared_tx *shtx) | |
554 | { | |
555 | shtx->flags = 0; | |
556 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) | |
557 | shtx->hardware = 1; | |
558 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) | |
559 | shtx->software = 1; | |
560 | return 0; | |
561 | } | |
562 | EXPORT_SYMBOL(sock_tx_timestamp); | |
563 | ||
89bddce5 | 564 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
565 | struct msghdr *msg, size_t size) |
566 | { | |
567 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
568 | int err; | |
569 | ||
570 | si->sock = sock; | |
571 | si->scm = NULL; | |
572 | si->msg = msg; | |
573 | si->size = size; | |
574 | ||
575 | err = security_socket_sendmsg(sock, msg, size); | |
576 | if (err) | |
577 | return err; | |
578 | ||
579 | return sock->ops->sendmsg(iocb, sock, msg, size); | |
580 | } | |
581 | ||
582 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
583 | { | |
584 | struct kiocb iocb; | |
585 | struct sock_iocb siocb; | |
586 | int ret; | |
587 | ||
588 | init_sync_kiocb(&iocb, NULL); | |
589 | iocb.private = &siocb; | |
590 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
591 | if (-EIOCBQUEUED == ret) | |
592 | ret = wait_on_sync_kiocb(&iocb); | |
593 | return ret; | |
594 | } | |
595 | ||
596 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
597 | struct kvec *vec, size_t num, size_t size) | |
598 | { | |
599 | mm_segment_t oldfs = get_fs(); | |
600 | int result; | |
601 | ||
602 | set_fs(KERNEL_DS); | |
603 | /* | |
604 | * the following is safe, since for compiler definitions of kvec and | |
605 | * iovec are identical, yielding the same in-core layout and alignment | |
606 | */ | |
89bddce5 | 607 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
608 | msg->msg_iovlen = num; |
609 | result = sock_sendmsg(sock, msg, size); | |
610 | set_fs(oldfs); | |
611 | return result; | |
612 | } | |
613 | ||
20d49473 PO |
614 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
615 | { | |
616 | if (kt.tv64) { | |
617 | *ts = ktime_to_timespec(kt); | |
618 | return 1; | |
619 | } else { | |
620 | return 0; | |
621 | } | |
622 | } | |
623 | ||
92f37fd2 ED |
624 | /* |
625 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
626 | */ | |
627 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
628 | struct sk_buff *skb) | |
629 | { | |
20d49473 PO |
630 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
631 | struct timespec ts[3]; | |
632 | int empty = 1; | |
633 | struct skb_shared_hwtstamps *shhwtstamps = | |
634 | skb_hwtstamps(skb); | |
635 | ||
636 | /* Race occurred between timestamp enabling and packet | |
637 | receiving. Fill in the current time for now. */ | |
638 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
639 | __net_timestamp(skb); | |
640 | ||
641 | if (need_software_tstamp) { | |
642 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
643 | struct timeval tv; | |
644 | skb_get_timestamp(skb, &tv); | |
645 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
646 | sizeof(tv), &tv); | |
647 | } else { | |
648 | struct timespec ts; | |
649 | skb_get_timestampns(skb, &ts); | |
650 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, | |
651 | sizeof(ts), &ts); | |
652 | } | |
653 | } | |
654 | ||
655 | ||
656 | memset(ts, 0, sizeof(ts)); | |
657 | if (skb->tstamp.tv64 && | |
658 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
659 | skb_get_timestampns(skb, ts + 0); | |
660 | empty = 0; | |
661 | } | |
662 | if (shhwtstamps) { | |
663 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
664 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
665 | empty = 0; | |
666 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
667 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
668 | empty = 0; | |
92f37fd2 | 669 | } |
20d49473 PO |
670 | if (!empty) |
671 | put_cmsg(msg, SOL_SOCKET, | |
672 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 ED |
673 | } |
674 | ||
7c81fd8b ACM |
675 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
676 | ||
3b885787 NH |
677 | inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) |
678 | { | |
679 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
680 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
681 | sizeof(__u32), &skb->dropcount); | |
682 | } | |
683 | ||
684 | void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, | |
685 | struct sk_buff *skb) | |
686 | { | |
687 | sock_recv_timestamp(msg, sk, skb); | |
688 | sock_recv_drops(msg, sk, skb); | |
689 | } | |
690 | EXPORT_SYMBOL_GPL(sock_recv_ts_and_drops); | |
691 | ||
a2e27255 ACM |
692 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
693 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 694 | { |
1da177e4 LT |
695 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
696 | ||
697 | si->sock = sock; | |
698 | si->scm = NULL; | |
699 | si->msg = msg; | |
700 | si->size = size; | |
701 | si->flags = flags; | |
702 | ||
1da177e4 LT |
703 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
704 | } | |
705 | ||
a2e27255 ACM |
706 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
707 | struct msghdr *msg, size_t size, int flags) | |
708 | { | |
709 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
710 | ||
711 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
712 | } | |
713 | ||
89bddce5 | 714 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
715 | size_t size, int flags) |
716 | { | |
717 | struct kiocb iocb; | |
718 | struct sock_iocb siocb; | |
719 | int ret; | |
720 | ||
89bddce5 | 721 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
722 | iocb.private = &siocb; |
723 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
724 | if (-EIOCBQUEUED == ret) | |
725 | ret = wait_on_sync_kiocb(&iocb); | |
726 | return ret; | |
727 | } | |
728 | ||
a2e27255 ACM |
729 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
730 | size_t size, int flags) | |
731 | { | |
732 | struct kiocb iocb; | |
733 | struct sock_iocb siocb; | |
734 | int ret; | |
735 | ||
736 | init_sync_kiocb(&iocb, NULL); | |
737 | iocb.private = &siocb; | |
738 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
739 | if (-EIOCBQUEUED == ret) | |
740 | ret = wait_on_sync_kiocb(&iocb); | |
741 | return ret; | |
742 | } | |
743 | ||
89bddce5 SH |
744 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
745 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
746 | { |
747 | mm_segment_t oldfs = get_fs(); | |
748 | int result; | |
749 | ||
750 | set_fs(KERNEL_DS); | |
751 | /* | |
752 | * the following is safe, since for compiler definitions of kvec and | |
753 | * iovec are identical, yielding the same in-core layout and alignment | |
754 | */ | |
89bddce5 | 755 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
756 | result = sock_recvmsg(sock, msg, size, flags); |
757 | set_fs(oldfs); | |
758 | return result; | |
759 | } | |
760 | ||
761 | static void sock_aio_dtor(struct kiocb *iocb) | |
762 | { | |
763 | kfree(iocb->private); | |
764 | } | |
765 | ||
ce1d4d3e CH |
766 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
767 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 768 | { |
1da177e4 LT |
769 | struct socket *sock; |
770 | int flags; | |
771 | ||
ce1d4d3e CH |
772 | sock = file->private_data; |
773 | ||
774 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; | |
775 | if (more) | |
776 | flags |= MSG_MORE; | |
777 | ||
e6949583 | 778 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 779 | } |
1da177e4 | 780 | |
9c55e01c JA |
781 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
782 | struct pipe_inode_info *pipe, size_t len, | |
783 | unsigned int flags) | |
784 | { | |
785 | struct socket *sock = file->private_data; | |
786 | ||
997b37da RDC |
787 | if (unlikely(!sock->ops->splice_read)) |
788 | return -EINVAL; | |
789 | ||
9c55e01c JA |
790 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
791 | } | |
792 | ||
ce1d4d3e | 793 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 794 | struct sock_iocb *siocb) |
ce1d4d3e CH |
795 | { |
796 | if (!is_sync_kiocb(iocb)) { | |
797 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
798 | if (!siocb) | |
799 | return NULL; | |
1da177e4 LT |
800 | iocb->ki_dtor = sock_aio_dtor; |
801 | } | |
1da177e4 | 802 | |
ce1d4d3e | 803 | siocb->kiocb = iocb; |
ce1d4d3e CH |
804 | iocb->private = siocb; |
805 | return siocb; | |
1da177e4 LT |
806 | } |
807 | ||
ce1d4d3e | 808 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
809 | struct file *file, const struct iovec *iov, |
810 | unsigned long nr_segs) | |
ce1d4d3e CH |
811 | { |
812 | struct socket *sock = file->private_data; | |
813 | size_t size = 0; | |
814 | int i; | |
1da177e4 | 815 | |
89bddce5 SH |
816 | for (i = 0; i < nr_segs; i++) |
817 | size += iov[i].iov_len; | |
1da177e4 | 818 | |
ce1d4d3e CH |
819 | msg->msg_name = NULL; |
820 | msg->msg_namelen = 0; | |
821 | msg->msg_control = NULL; | |
822 | msg->msg_controllen = 0; | |
89bddce5 | 823 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
824 | msg->msg_iovlen = nr_segs; |
825 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
826 | ||
827 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
828 | } | |
829 | ||
027445c3 BP |
830 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
831 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
832 | { |
833 | struct sock_iocb siocb, *x; | |
834 | ||
1da177e4 LT |
835 | if (pos != 0) |
836 | return -ESPIPE; | |
027445c3 BP |
837 | |
838 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
839 | return 0; |
840 | ||
027445c3 BP |
841 | |
842 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
843 | if (!x) |
844 | return -ENOMEM; | |
027445c3 | 845 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
846 | } |
847 | ||
ce1d4d3e | 848 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
849 | struct file *file, const struct iovec *iov, |
850 | unsigned long nr_segs) | |
1da177e4 | 851 | { |
ce1d4d3e CH |
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 | if (sock->type == SOCK_SEQPACKET) | |
867 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 868 | |
ce1d4d3e | 869 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
870 | } |
871 | ||
027445c3 BP |
872 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
873 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
874 | { |
875 | struct sock_iocb siocb, *x; | |
1da177e4 | 876 | |
ce1d4d3e CH |
877 | if (pos != 0) |
878 | return -ESPIPE; | |
027445c3 | 879 | |
027445c3 | 880 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
881 | if (!x) |
882 | return -ENOMEM; | |
1da177e4 | 883 | |
027445c3 | 884 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
885 | } |
886 | ||
1da177e4 LT |
887 | /* |
888 | * Atomic setting of ioctl hooks to avoid race | |
889 | * with module unload. | |
890 | */ | |
891 | ||
4a3e2f71 | 892 | static DEFINE_MUTEX(br_ioctl_mutex); |
881d966b | 893 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL; |
1da177e4 | 894 | |
881d966b | 895 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 896 | { |
4a3e2f71 | 897 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 898 | br_ioctl_hook = hook; |
4a3e2f71 | 899 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 | 900 | } |
89bddce5 | 901 | |
1da177e4 LT |
902 | EXPORT_SYMBOL(brioctl_set); |
903 | ||
4a3e2f71 | 904 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 905 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 906 | |
881d966b | 907 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 908 | { |
4a3e2f71 | 909 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 910 | vlan_ioctl_hook = hook; |
4a3e2f71 | 911 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 912 | } |
89bddce5 | 913 | |
1da177e4 LT |
914 | EXPORT_SYMBOL(vlan_ioctl_set); |
915 | ||
4a3e2f71 | 916 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 917 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 918 | |
89bddce5 | 919 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 920 | { |
4a3e2f71 | 921 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 922 | dlci_ioctl_hook = hook; |
4a3e2f71 | 923 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 | 924 | } |
89bddce5 | 925 | |
1da177e4 LT |
926 | EXPORT_SYMBOL(dlci_ioctl_set); |
927 | ||
6b96018b AB |
928 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
929 | unsigned int cmd, unsigned long arg) | |
930 | { | |
931 | int err; | |
932 | void __user *argp = (void __user *)arg; | |
933 | ||
934 | err = sock->ops->ioctl(sock, cmd, arg); | |
935 | ||
936 | /* | |
937 | * If this ioctl is unknown try to hand it down | |
938 | * to the NIC driver. | |
939 | */ | |
940 | if (err == -ENOIOCTLCMD) | |
941 | err = dev_ioctl(net, cmd, argp); | |
942 | ||
943 | return err; | |
944 | } | |
945 | ||
1da177e4 LT |
946 | /* |
947 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
948 | * what to do with it - that's up to the protocol still. | |
949 | */ | |
950 | ||
951 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
952 | { | |
953 | struct socket *sock; | |
881d966b | 954 | struct sock *sk; |
1da177e4 LT |
955 | void __user *argp = (void __user *)arg; |
956 | int pid, err; | |
881d966b | 957 | struct net *net; |
1da177e4 | 958 | |
b69aee04 | 959 | sock = file->private_data; |
881d966b | 960 | sk = sock->sk; |
3b1e0a65 | 961 | net = sock_net(sk); |
1da177e4 | 962 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 963 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 964 | } else |
3d23e349 | 965 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 966 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 967 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 968 | } else |
3d23e349 | 969 | #endif |
89bddce5 | 970 | switch (cmd) { |
1da177e4 LT |
971 | case FIOSETOWN: |
972 | case SIOCSPGRP: | |
973 | err = -EFAULT; | |
974 | if (get_user(pid, (int __user *)argp)) | |
975 | break; | |
976 | err = f_setown(sock->file, pid, 1); | |
977 | break; | |
978 | case FIOGETOWN: | |
979 | case SIOCGPGRP: | |
609d7fa9 | 980 | err = put_user(f_getown(sock->file), |
89bddce5 | 981 | (int __user *)argp); |
1da177e4 LT |
982 | break; |
983 | case SIOCGIFBR: | |
984 | case SIOCSIFBR: | |
985 | case SIOCBRADDBR: | |
986 | case SIOCBRDELBR: | |
987 | err = -ENOPKG; | |
988 | if (!br_ioctl_hook) | |
989 | request_module("bridge"); | |
990 | ||
4a3e2f71 | 991 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 992 | if (br_ioctl_hook) |
881d966b | 993 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 994 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
995 | break; |
996 | case SIOCGIFVLAN: | |
997 | case SIOCSIFVLAN: | |
998 | err = -ENOPKG; | |
999 | if (!vlan_ioctl_hook) | |
1000 | request_module("8021q"); | |
1001 | ||
4a3e2f71 | 1002 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1003 | if (vlan_ioctl_hook) |
881d966b | 1004 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1005 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1006 | break; |
1da177e4 LT |
1007 | case SIOCADDDLCI: |
1008 | case SIOCDELDLCI: | |
1009 | err = -ENOPKG; | |
1010 | if (!dlci_ioctl_hook) | |
1011 | request_module("dlci"); | |
1012 | ||
7512cbf6 PE |
1013 | mutex_lock(&dlci_ioctl_mutex); |
1014 | if (dlci_ioctl_hook) | |
1da177e4 | 1015 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1016 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1017 | break; |
1018 | default: | |
6b96018b | 1019 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1020 | break; |
89bddce5 | 1021 | } |
1da177e4 LT |
1022 | return err; |
1023 | } | |
1024 | ||
1025 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1026 | { | |
1027 | int err; | |
1028 | struct socket *sock = NULL; | |
89bddce5 | 1029 | |
1da177e4 LT |
1030 | err = security_socket_create(family, type, protocol, 1); |
1031 | if (err) | |
1032 | goto out; | |
1033 | ||
1034 | sock = sock_alloc(); | |
1035 | if (!sock) { | |
1036 | err = -ENOMEM; | |
1037 | goto out; | |
1038 | } | |
1039 | ||
1da177e4 | 1040 | sock->type = type; |
7420ed23 VY |
1041 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1042 | if (err) | |
1043 | goto out_release; | |
1044 | ||
1da177e4 LT |
1045 | out: |
1046 | *res = sock; | |
1047 | return err; | |
7420ed23 VY |
1048 | out_release: |
1049 | sock_release(sock); | |
1050 | sock = NULL; | |
1051 | goto out; | |
1da177e4 LT |
1052 | } |
1053 | ||
1054 | /* No kernel lock held - perfect */ | |
89bddce5 | 1055 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1056 | { |
1057 | struct socket *sock; | |
1058 | ||
1059 | /* | |
89bddce5 | 1060 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1061 | */ |
b69aee04 | 1062 | sock = file->private_data; |
1da177e4 LT |
1063 | return sock->ops->poll(file, sock, wait); |
1064 | } | |
1065 | ||
89bddce5 | 1066 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1067 | { |
b69aee04 | 1068 | struct socket *sock = file->private_data; |
1da177e4 LT |
1069 | |
1070 | return sock->ops->mmap(file, sock, vma); | |
1071 | } | |
1072 | ||
20380731 | 1073 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1074 | { |
1075 | /* | |
89bddce5 SH |
1076 | * It was possible the inode is NULL we were |
1077 | * closing an unfinished socket. | |
1da177e4 LT |
1078 | */ |
1079 | ||
89bddce5 | 1080 | if (!inode) { |
1da177e4 LT |
1081 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1082 | return 0; | |
1083 | } | |
1da177e4 LT |
1084 | sock_release(SOCKET_I(inode)); |
1085 | return 0; | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * Update the socket async list | |
1090 | * | |
1091 | * Fasync_list locking strategy. | |
1092 | * | |
1093 | * 1. fasync_list is modified only under process context socket lock | |
1094 | * i.e. under semaphore. | |
1095 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
1096 | * or under socket lock. | |
1097 | * 3. fasync_list can be used from softirq context, so that | |
1098 | * modification under socket lock have to be enhanced with | |
1099 | * write_lock_bh(&sk->sk_callback_lock). | |
1100 | * --ANK (990710) | |
1101 | */ | |
1102 | ||
1103 | static int sock_fasync(int fd, struct file *filp, int on) | |
1104 | { | |
89bddce5 | 1105 | struct fasync_struct *fa, *fna = NULL, **prev; |
1da177e4 LT |
1106 | struct socket *sock; |
1107 | struct sock *sk; | |
1108 | ||
89bddce5 | 1109 | if (on) { |
8b3a7005 | 1110 | fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL); |
89bddce5 | 1111 | if (fna == NULL) |
1da177e4 LT |
1112 | return -ENOMEM; |
1113 | } | |
1114 | ||
b69aee04 | 1115 | sock = filp->private_data; |
1da177e4 | 1116 | |
89bddce5 SH |
1117 | sk = sock->sk; |
1118 | if (sk == NULL) { | |
1da177e4 LT |
1119 | kfree(fna); |
1120 | return -EINVAL; | |
1121 | } | |
1122 | ||
1123 | lock_sock(sk); | |
1124 | ||
76398425 JC |
1125 | spin_lock(&filp->f_lock); |
1126 | if (on) | |
1127 | filp->f_flags |= FASYNC; | |
1128 | else | |
1129 | filp->f_flags &= ~FASYNC; | |
1130 | spin_unlock(&filp->f_lock); | |
1131 | ||
89bddce5 | 1132 | prev = &(sock->fasync_list); |
1da177e4 | 1133 | |
89bddce5 SH |
1134 | for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev) |
1135 | if (fa->fa_file == filp) | |
1da177e4 LT |
1136 | break; |
1137 | ||
89bddce5 SH |
1138 | if (on) { |
1139 | if (fa != NULL) { | |
1da177e4 | 1140 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1141 | fa->fa_fd = fd; |
1da177e4 LT |
1142 | write_unlock_bh(&sk->sk_callback_lock); |
1143 | ||
1144 | kfree(fna); | |
1145 | goto out; | |
1146 | } | |
89bddce5 SH |
1147 | fna->fa_file = filp; |
1148 | fna->fa_fd = fd; | |
1149 | fna->magic = FASYNC_MAGIC; | |
1150 | fna->fa_next = sock->fasync_list; | |
1da177e4 | 1151 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1152 | sock->fasync_list = fna; |
bcdce719 | 1153 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1154 | write_unlock_bh(&sk->sk_callback_lock); |
89bddce5 SH |
1155 | } else { |
1156 | if (fa != NULL) { | |
1da177e4 | 1157 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1158 | *prev = fa->fa_next; |
bcdce719 ED |
1159 | if (!sock->fasync_list) |
1160 | sock_reset_flag(sk, SOCK_FASYNC); | |
1da177e4 LT |
1161 | write_unlock_bh(&sk->sk_callback_lock); |
1162 | kfree(fa); | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | out: | |
1167 | release_sock(sock->sk); | |
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | /* This function may be called only under socket lock or callback_lock */ | |
1172 | ||
1173 | int sock_wake_async(struct socket *sock, int how, int band) | |
1174 | { | |
1175 | if (!sock || !sock->fasync_list) | |
1176 | return -1; | |
89bddce5 | 1177 | switch (how) { |
8d8ad9d7 | 1178 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1179 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1180 | break; | |
1181 | goto call_kill; | |
8d8ad9d7 | 1182 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1183 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1184 | break; | |
1185 | /* fall through */ | |
8d8ad9d7 | 1186 | case SOCK_WAKE_IO: |
89bddce5 | 1187 | call_kill: |
1da177e4 LT |
1188 | __kill_fasync(sock->fasync_list, SIGIO, band); |
1189 | break; | |
8d8ad9d7 | 1190 | case SOCK_WAKE_URG: |
1da177e4 LT |
1191 | __kill_fasync(sock->fasync_list, SIGURG, band); |
1192 | } | |
1193 | return 0; | |
1194 | } | |
1195 | ||
1b8d7ae4 | 1196 | static int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1197 | struct socket **res, int kern) |
1da177e4 LT |
1198 | { |
1199 | int err; | |
1200 | struct socket *sock; | |
55737fda | 1201 | const struct net_proto_family *pf; |
1da177e4 LT |
1202 | |
1203 | /* | |
89bddce5 | 1204 | * Check protocol is in range |
1da177e4 LT |
1205 | */ |
1206 | if (family < 0 || family >= NPROTO) | |
1207 | return -EAFNOSUPPORT; | |
1208 | if (type < 0 || type >= SOCK_MAX) | |
1209 | return -EINVAL; | |
1210 | ||
1211 | /* Compatibility. | |
1212 | ||
1213 | This uglymoron is moved from INET layer to here to avoid | |
1214 | deadlock in module load. | |
1215 | */ | |
1216 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1217 | static int warned; |
1da177e4 LT |
1218 | if (!warned) { |
1219 | warned = 1; | |
89bddce5 SH |
1220 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1221 | current->comm); | |
1da177e4 LT |
1222 | } |
1223 | family = PF_PACKET; | |
1224 | } | |
1225 | ||
1226 | err = security_socket_create(family, type, protocol, kern); | |
1227 | if (err) | |
1228 | return err; | |
89bddce5 | 1229 | |
55737fda SH |
1230 | /* |
1231 | * Allocate the socket and allow the family to set things up. if | |
1232 | * the protocol is 0, the family is instructed to select an appropriate | |
1233 | * default. | |
1234 | */ | |
1235 | sock = sock_alloc(); | |
1236 | if (!sock) { | |
1237 | if (net_ratelimit()) | |
1238 | printk(KERN_WARNING "socket: no more sockets\n"); | |
1239 | return -ENFILE; /* Not exactly a match, but its the | |
1240 | closest posix thing */ | |
1241 | } | |
1242 | ||
1243 | sock->type = type; | |
1244 | ||
95a5afca | 1245 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1246 | /* Attempt to load a protocol module if the find failed. |
1247 | * | |
1248 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1249 | * requested real, full-featured networking support upon configuration. |
1250 | * Otherwise module support will break! | |
1251 | */ | |
55737fda | 1252 | if (net_families[family] == NULL) |
89bddce5 | 1253 | request_module("net-pf-%d", family); |
1da177e4 LT |
1254 | #endif |
1255 | ||
55737fda SH |
1256 | rcu_read_lock(); |
1257 | pf = rcu_dereference(net_families[family]); | |
1258 | err = -EAFNOSUPPORT; | |
1259 | if (!pf) | |
1260 | goto out_release; | |
1da177e4 LT |
1261 | |
1262 | /* | |
1263 | * We will call the ->create function, that possibly is in a loadable | |
1264 | * module, so we have to bump that loadable module refcnt first. | |
1265 | */ | |
55737fda | 1266 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1267 | goto out_release; |
1268 | ||
55737fda SH |
1269 | /* Now protected by module ref count */ |
1270 | rcu_read_unlock(); | |
1271 | ||
3f378b68 | 1272 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1273 | if (err < 0) |
1da177e4 | 1274 | goto out_module_put; |
a79af59e | 1275 | |
1da177e4 LT |
1276 | /* |
1277 | * Now to bump the refcnt of the [loadable] module that owns this | |
1278 | * socket at sock_release time we decrement its refcnt. | |
1279 | */ | |
55737fda SH |
1280 | if (!try_module_get(sock->ops->owner)) |
1281 | goto out_module_busy; | |
1282 | ||
1da177e4 LT |
1283 | /* |
1284 | * Now that we're done with the ->create function, the [loadable] | |
1285 | * module can have its refcnt decremented | |
1286 | */ | |
55737fda | 1287 | module_put(pf->owner); |
7420ed23 VY |
1288 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1289 | if (err) | |
3b185525 | 1290 | goto out_sock_release; |
55737fda | 1291 | *res = sock; |
1da177e4 | 1292 | |
55737fda SH |
1293 | return 0; |
1294 | ||
1295 | out_module_busy: | |
1296 | err = -EAFNOSUPPORT; | |
1da177e4 | 1297 | out_module_put: |
55737fda SH |
1298 | sock->ops = NULL; |
1299 | module_put(pf->owner); | |
1300 | out_sock_release: | |
1da177e4 | 1301 | sock_release(sock); |
55737fda SH |
1302 | return err; |
1303 | ||
1304 | out_release: | |
1305 | rcu_read_unlock(); | |
1306 | goto out_sock_release; | |
1da177e4 LT |
1307 | } |
1308 | ||
1309 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1310 | { | |
1b8d7ae4 | 1311 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 LT |
1312 | } |
1313 | ||
1314 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1315 | { | |
1b8d7ae4 | 1316 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 LT |
1317 | } |
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 | ||
a677a039 | 1393 | fd1 = sock_alloc_fd(&newfile1, flags & O_CLOEXEC); |
bf3c23d1 DM |
1394 | if (unlikely(fd1 < 0)) { |
1395 | err = fd1; | |
db349509 | 1396 | goto out_release_both; |
bf3c23d1 | 1397 | } |
1da177e4 | 1398 | |
198de4d7 AV |
1399 | err = sock_attach_fd(sock1, newfile1, flags & O_NONBLOCK); |
1400 | if (unlikely(err < 0)) { | |
db349509 AV |
1401 | put_filp(newfile1); |
1402 | put_unused_fd(fd1); | |
1da177e4 | 1403 | goto out_release_both; |
db349509 | 1404 | } |
1da177e4 | 1405 | |
198de4d7 AV |
1406 | fd2 = sock_alloc_fd(&newfile2, flags & O_CLOEXEC); |
1407 | if (unlikely(fd2 < 0)) { | |
1408 | err = fd2; | |
1409 | fput(newfile1); | |
1410 | put_unused_fd(fd1); | |
1411 | sock_release(sock2); | |
1412 | goto out; | |
db349509 AV |
1413 | } |
1414 | ||
77d27200 | 1415 | err = sock_attach_fd(sock2, newfile2, flags & O_NONBLOCK); |
db349509 | 1416 | if (unlikely(err < 0)) { |
198de4d7 AV |
1417 | put_filp(newfile2); |
1418 | put_unused_fd(fd2); | |
db349509 | 1419 | fput(newfile1); |
198de4d7 AV |
1420 | put_unused_fd(fd1); |
1421 | sock_release(sock2); | |
1422 | goto out; | |
db349509 AV |
1423 | } |
1424 | ||
157cf649 | 1425 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1426 | fd_install(fd1, newfile1); |
1427 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1428 | /* fd1 and fd2 may be already another descriptors. |
1429 | * Not kernel problem. | |
1430 | */ | |
1431 | ||
89bddce5 | 1432 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1433 | if (!err) |
1434 | err = put_user(fd2, &usockvec[1]); | |
1435 | if (!err) | |
1436 | return 0; | |
1437 | ||
1438 | sys_close(fd2); | |
1439 | sys_close(fd1); | |
1440 | return err; | |
1441 | ||
1da177e4 | 1442 | out_release_both: |
89bddce5 | 1443 | sock_release(sock2); |
1da177e4 | 1444 | out_release_1: |
89bddce5 | 1445 | sock_release(sock1); |
1da177e4 LT |
1446 | out: |
1447 | return err; | |
1448 | } | |
1449 | ||
1da177e4 LT |
1450 | /* |
1451 | * Bind a name to a socket. Nothing much to do here since it's | |
1452 | * the protocol's responsibility to handle the local address. | |
1453 | * | |
1454 | * We move the socket address to kernel space before we call | |
1455 | * the protocol layer (having also checked the address is ok). | |
1456 | */ | |
1457 | ||
20f37034 | 1458 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1459 | { |
1460 | struct socket *sock; | |
230b1839 | 1461 | struct sockaddr_storage address; |
6cb153ca | 1462 | int err, fput_needed; |
1da177e4 | 1463 | |
89bddce5 | 1464 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1465 | if (sock) { |
230b1839 | 1466 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
89bddce5 SH |
1467 | if (err >= 0) { |
1468 | err = security_socket_bind(sock, | |
230b1839 | 1469 | (struct sockaddr *)&address, |
89bddce5 | 1470 | addrlen); |
6cb153ca BL |
1471 | if (!err) |
1472 | err = sock->ops->bind(sock, | |
89bddce5 | 1473 | (struct sockaddr *) |
230b1839 | 1474 | &address, addrlen); |
1da177e4 | 1475 | } |
6cb153ca | 1476 | fput_light(sock->file, fput_needed); |
89bddce5 | 1477 | } |
1da177e4 LT |
1478 | return err; |
1479 | } | |
1480 | ||
1da177e4 LT |
1481 | /* |
1482 | * Perform a listen. Basically, we allow the protocol to do anything | |
1483 | * necessary for a listen, and if that works, we mark the socket as | |
1484 | * ready for listening. | |
1485 | */ | |
1486 | ||
3e0fa65f | 1487 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1488 | { |
1489 | struct socket *sock; | |
6cb153ca | 1490 | int err, fput_needed; |
b8e1f9b5 | 1491 | int somaxconn; |
89bddce5 SH |
1492 | |
1493 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1494 | if (sock) { | |
8efa6e93 | 1495 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
b8e1f9b5 PE |
1496 | if ((unsigned)backlog > somaxconn) |
1497 | backlog = somaxconn; | |
1da177e4 LT |
1498 | |
1499 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1500 | if (!err) |
1501 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1502 | |
6cb153ca | 1503 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1504 | } |
1505 | return err; | |
1506 | } | |
1507 | ||
1da177e4 LT |
1508 | /* |
1509 | * For accept, we attempt to create a new socket, set up the link | |
1510 | * with the client, wake up the client, then return the new | |
1511 | * connected fd. We collect the address of the connector in kernel | |
1512 | * space and move it to user at the very end. This is unclean because | |
1513 | * we open the socket then return an error. | |
1514 | * | |
1515 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1516 | * status to recvmsg. We need to add that support in a way thats | |
1517 | * clean when we restucture accept also. | |
1518 | */ | |
1519 | ||
20f37034 HC |
1520 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1521 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1522 | { |
1523 | struct socket *sock, *newsock; | |
39d8c1b6 | 1524 | struct file *newfile; |
6cb153ca | 1525 | int err, len, newfd, fput_needed; |
230b1839 | 1526 | struct sockaddr_storage address; |
1da177e4 | 1527 | |
77d27200 | 1528 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1529 | return -EINVAL; |
1530 | ||
1531 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1532 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1533 | ||
6cb153ca | 1534 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1535 | if (!sock) |
1536 | goto out; | |
1537 | ||
1538 | err = -ENFILE; | |
89bddce5 | 1539 | if (!(newsock = sock_alloc())) |
1da177e4 LT |
1540 | goto out_put; |
1541 | ||
1542 | newsock->type = sock->type; | |
1543 | newsock->ops = sock->ops; | |
1544 | ||
1da177e4 LT |
1545 | /* |
1546 | * We don't need try_module_get here, as the listening socket (sock) | |
1547 | * has the protocol module (sock->ops->owner) held. | |
1548 | */ | |
1549 | __module_get(newsock->ops->owner); | |
1550 | ||
aaca0bdc | 1551 | newfd = sock_alloc_fd(&newfile, flags & O_CLOEXEC); |
39d8c1b6 DM |
1552 | if (unlikely(newfd < 0)) { |
1553 | err = newfd; | |
9a1875e6 DM |
1554 | sock_release(newsock); |
1555 | goto out_put; | |
39d8c1b6 DM |
1556 | } |
1557 | ||
77d27200 | 1558 | err = sock_attach_fd(newsock, newfile, flags & O_NONBLOCK); |
39d8c1b6 | 1559 | if (err < 0) |
79f4f642 | 1560 | goto out_fd_simple; |
39d8c1b6 | 1561 | |
a79af59e FF |
1562 | err = security_socket_accept(sock, newsock); |
1563 | if (err) | |
39d8c1b6 | 1564 | goto out_fd; |
a79af59e | 1565 | |
1da177e4 LT |
1566 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1567 | if (err < 0) | |
39d8c1b6 | 1568 | goto out_fd; |
1da177e4 LT |
1569 | |
1570 | if (upeer_sockaddr) { | |
230b1839 | 1571 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1572 | &len, 2) < 0) { |
1da177e4 | 1573 | err = -ECONNABORTED; |
39d8c1b6 | 1574 | goto out_fd; |
1da177e4 | 1575 | } |
230b1839 YH |
1576 | err = move_addr_to_user((struct sockaddr *)&address, |
1577 | len, upeer_sockaddr, upeer_addrlen); | |
1da177e4 | 1578 | if (err < 0) |
39d8c1b6 | 1579 | goto out_fd; |
1da177e4 LT |
1580 | } |
1581 | ||
1582 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1583 | ||
39d8c1b6 DM |
1584 | fd_install(newfd, newfile); |
1585 | err = newfd; | |
1da177e4 | 1586 | |
1da177e4 | 1587 | out_put: |
6cb153ca | 1588 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1589 | out: |
1590 | return err; | |
79f4f642 AD |
1591 | out_fd_simple: |
1592 | sock_release(newsock); | |
1593 | put_filp(newfile); | |
1594 | put_unused_fd(newfd); | |
1595 | goto out_put; | |
39d8c1b6 | 1596 | out_fd: |
9606a216 | 1597 | fput(newfile); |
39d8c1b6 | 1598 | put_unused_fd(newfd); |
1da177e4 LT |
1599 | goto out_put; |
1600 | } | |
1601 | ||
20f37034 HC |
1602 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1603 | int __user *, upeer_addrlen) | |
aaca0bdc | 1604 | { |
de11defe | 1605 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1606 | } |
1607 | ||
1da177e4 LT |
1608 | /* |
1609 | * Attempt to connect to a socket with the server address. The address | |
1610 | * is in user space so we verify it is OK and move it to kernel space. | |
1611 | * | |
1612 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1613 | * break bindings | |
1614 | * | |
1615 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1616 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1617 | * include the -EINPROGRESS status for such sockets. | |
1618 | */ | |
1619 | ||
20f37034 HC |
1620 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1621 | int, addrlen) | |
1da177e4 LT |
1622 | { |
1623 | struct socket *sock; | |
230b1839 | 1624 | struct sockaddr_storage address; |
6cb153ca | 1625 | int err, fput_needed; |
1da177e4 | 1626 | |
6cb153ca | 1627 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1628 | if (!sock) |
1629 | goto out; | |
230b1839 | 1630 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
1da177e4 LT |
1631 | if (err < 0) |
1632 | goto out_put; | |
1633 | ||
89bddce5 | 1634 | err = |
230b1839 | 1635 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1636 | if (err) |
1637 | goto out_put; | |
1638 | ||
230b1839 | 1639 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1640 | sock->file->f_flags); |
1641 | out_put: | |
6cb153ca | 1642 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1643 | out: |
1644 | return err; | |
1645 | } | |
1646 | ||
1647 | /* | |
1648 | * Get the local address ('name') of a socket object. Move the obtained | |
1649 | * name to user space. | |
1650 | */ | |
1651 | ||
20f37034 HC |
1652 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1653 | int __user *, usockaddr_len) | |
1da177e4 LT |
1654 | { |
1655 | struct socket *sock; | |
230b1839 | 1656 | struct sockaddr_storage address; |
6cb153ca | 1657 | int len, err, fput_needed; |
89bddce5 | 1658 | |
6cb153ca | 1659 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1660 | if (!sock) |
1661 | goto out; | |
1662 | ||
1663 | err = security_socket_getsockname(sock); | |
1664 | if (err) | |
1665 | goto out_put; | |
1666 | ||
230b1839 | 1667 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1668 | if (err) |
1669 | goto out_put; | |
230b1839 | 1670 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1671 | |
1672 | out_put: | |
6cb153ca | 1673 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1674 | out: |
1675 | return err; | |
1676 | } | |
1677 | ||
1678 | /* | |
1679 | * Get the remote address ('name') of a socket object. Move the obtained | |
1680 | * name to user space. | |
1681 | */ | |
1682 | ||
20f37034 HC |
1683 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1684 | int __user *, usockaddr_len) | |
1da177e4 LT |
1685 | { |
1686 | struct socket *sock; | |
230b1839 | 1687 | struct sockaddr_storage address; |
6cb153ca | 1688 | int len, err, fput_needed; |
1da177e4 | 1689 | |
89bddce5 SH |
1690 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1691 | if (sock != NULL) { | |
1da177e4 LT |
1692 | err = security_socket_getpeername(sock); |
1693 | if (err) { | |
6cb153ca | 1694 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1695 | return err; |
1696 | } | |
1697 | ||
89bddce5 | 1698 | err = |
230b1839 | 1699 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1700 | 1); |
1da177e4 | 1701 | if (!err) |
230b1839 | 1702 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
89bddce5 | 1703 | usockaddr_len); |
6cb153ca | 1704 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1705 | } |
1706 | return err; | |
1707 | } | |
1708 | ||
1709 | /* | |
1710 | * Send a datagram to a given address. We move the address into kernel | |
1711 | * space and check the user space data area is readable before invoking | |
1712 | * the protocol. | |
1713 | */ | |
1714 | ||
3e0fa65f HC |
1715 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
1716 | unsigned, flags, struct sockaddr __user *, addr, | |
1717 | int, addr_len) | |
1da177e4 LT |
1718 | { |
1719 | struct socket *sock; | |
230b1839 | 1720 | struct sockaddr_storage address; |
1da177e4 LT |
1721 | int err; |
1722 | struct msghdr msg; | |
1723 | struct iovec iov; | |
6cb153ca | 1724 | int fput_needed; |
6cb153ca | 1725 | |
de0fa95c PE |
1726 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1727 | if (!sock) | |
4387ff75 | 1728 | goto out; |
6cb153ca | 1729 | |
89bddce5 SH |
1730 | iov.iov_base = buff; |
1731 | iov.iov_len = len; | |
1732 | msg.msg_name = NULL; | |
1733 | msg.msg_iov = &iov; | |
1734 | msg.msg_iovlen = 1; | |
1735 | msg.msg_control = NULL; | |
1736 | msg.msg_controllen = 0; | |
1737 | msg.msg_namelen = 0; | |
6cb153ca | 1738 | if (addr) { |
230b1839 | 1739 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
1da177e4 LT |
1740 | if (err < 0) |
1741 | goto out_put; | |
230b1839 | 1742 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1743 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1744 | } |
1745 | if (sock->file->f_flags & O_NONBLOCK) | |
1746 | flags |= MSG_DONTWAIT; | |
1747 | msg.msg_flags = flags; | |
1748 | err = sock_sendmsg(sock, &msg, len); | |
1749 | ||
89bddce5 | 1750 | out_put: |
de0fa95c | 1751 | fput_light(sock->file, fput_needed); |
4387ff75 | 1752 | out: |
1da177e4 LT |
1753 | return err; |
1754 | } | |
1755 | ||
1756 | /* | |
89bddce5 | 1757 | * Send a datagram down a socket. |
1da177e4 LT |
1758 | */ |
1759 | ||
3e0fa65f HC |
1760 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
1761 | unsigned, flags) | |
1da177e4 LT |
1762 | { |
1763 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1764 | } | |
1765 | ||
1766 | /* | |
89bddce5 | 1767 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1768 | * sender. We verify the buffers are writable and if needed move the |
1769 | * sender address from kernel to user space. | |
1770 | */ | |
1771 | ||
3e0fa65f HC |
1772 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
1773 | unsigned, flags, struct sockaddr __user *, addr, | |
1774 | int __user *, addr_len) | |
1da177e4 LT |
1775 | { |
1776 | struct socket *sock; | |
1777 | struct iovec iov; | |
1778 | struct msghdr msg; | |
230b1839 | 1779 | struct sockaddr_storage address; |
89bddce5 | 1780 | int err, err2; |
6cb153ca BL |
1781 | int fput_needed; |
1782 | ||
de0fa95c | 1783 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1784 | if (!sock) |
de0fa95c | 1785 | goto out; |
1da177e4 | 1786 | |
89bddce5 SH |
1787 | msg.msg_control = NULL; |
1788 | msg.msg_controllen = 0; | |
1789 | msg.msg_iovlen = 1; | |
1790 | msg.msg_iov = &iov; | |
1791 | iov.iov_len = size; | |
1792 | iov.iov_base = ubuf; | |
230b1839 YH |
1793 | msg.msg_name = (struct sockaddr *)&address; |
1794 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1795 | if (sock->file->f_flags & O_NONBLOCK) |
1796 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1797 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1798 | |
89bddce5 | 1799 | if (err >= 0 && addr != NULL) { |
230b1839 YH |
1800 | err2 = move_addr_to_user((struct sockaddr *)&address, |
1801 | msg.msg_namelen, addr, addr_len); | |
89bddce5 SH |
1802 | if (err2 < 0) |
1803 | err = err2; | |
1da177e4 | 1804 | } |
de0fa95c PE |
1805 | |
1806 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1807 | out: |
1da177e4 LT |
1808 | return err; |
1809 | } | |
1810 | ||
1811 | /* | |
89bddce5 | 1812 | * Receive a datagram from a socket. |
1da177e4 LT |
1813 | */ |
1814 | ||
89bddce5 SH |
1815 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
1816 | unsigned flags) | |
1da177e4 LT |
1817 | { |
1818 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1819 | } | |
1820 | ||
1821 | /* | |
1822 | * Set a socket option. Because we don't know the option lengths we have | |
1823 | * to pass the user mode parameter for the protocols to sort out. | |
1824 | */ | |
1825 | ||
20f37034 HC |
1826 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1827 | char __user *, optval, int, optlen) | |
1da177e4 | 1828 | { |
6cb153ca | 1829 | int err, fput_needed; |
1da177e4 LT |
1830 | struct socket *sock; |
1831 | ||
1832 | if (optlen < 0) | |
1833 | return -EINVAL; | |
89bddce5 SH |
1834 | |
1835 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1836 | if (sock != NULL) { | |
1837 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1838 | if (err) |
1839 | goto out_put; | |
1da177e4 LT |
1840 | |
1841 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1842 | err = |
1843 | sock_setsockopt(sock, level, optname, optval, | |
1844 | optlen); | |
1da177e4 | 1845 | else |
89bddce5 SH |
1846 | err = |
1847 | sock->ops->setsockopt(sock, level, optname, optval, | |
1848 | optlen); | |
6cb153ca BL |
1849 | out_put: |
1850 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1851 | } |
1852 | return err; | |
1853 | } | |
1854 | ||
1855 | /* | |
1856 | * Get a socket option. Because we don't know the option lengths we have | |
1857 | * to pass a user mode parameter for the protocols to sort out. | |
1858 | */ | |
1859 | ||
20f37034 HC |
1860 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1861 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1862 | { |
6cb153ca | 1863 | int err, fput_needed; |
1da177e4 LT |
1864 | struct socket *sock; |
1865 | ||
89bddce5 SH |
1866 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1867 | if (sock != NULL) { | |
6cb153ca BL |
1868 | err = security_socket_getsockopt(sock, level, optname); |
1869 | if (err) | |
1870 | goto out_put; | |
1da177e4 LT |
1871 | |
1872 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1873 | err = |
1874 | sock_getsockopt(sock, level, optname, optval, | |
1875 | optlen); | |
1da177e4 | 1876 | else |
89bddce5 SH |
1877 | err = |
1878 | sock->ops->getsockopt(sock, level, optname, optval, | |
1879 | optlen); | |
6cb153ca BL |
1880 | out_put: |
1881 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1882 | } |
1883 | return err; | |
1884 | } | |
1885 | ||
1da177e4 LT |
1886 | /* |
1887 | * Shutdown a socket. | |
1888 | */ | |
1889 | ||
754fe8d2 | 1890 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1891 | { |
6cb153ca | 1892 | int err, fput_needed; |
1da177e4 LT |
1893 | struct socket *sock; |
1894 | ||
89bddce5 SH |
1895 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1896 | if (sock != NULL) { | |
1da177e4 | 1897 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1898 | if (!err) |
1899 | err = sock->ops->shutdown(sock, how); | |
1900 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1901 | } |
1902 | return err; | |
1903 | } | |
1904 | ||
89bddce5 | 1905 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1906 | * fields which are the same type (int / unsigned) on our platforms. |
1907 | */ | |
1908 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1909 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1910 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1911 | ||
1da177e4 LT |
1912 | /* |
1913 | * BSD sendmsg interface | |
1914 | */ | |
1915 | ||
3e0fa65f | 1916 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
1da177e4 | 1917 | { |
89bddce5 SH |
1918 | struct compat_msghdr __user *msg_compat = |
1919 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1920 | struct socket *sock; |
230b1839 | 1921 | struct sockaddr_storage address; |
1da177e4 | 1922 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1923 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1924 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1925 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 LT |
1926 | unsigned char *ctl_buf = ctl; |
1927 | struct msghdr msg_sys; | |
1928 | int err, ctl_len, iov_size, total_len; | |
6cb153ca | 1929 | int fput_needed; |
89bddce5 | 1930 | |
1da177e4 LT |
1931 | err = -EFAULT; |
1932 | if (MSG_CMSG_COMPAT & flags) { | |
1933 | if (get_compat_msghdr(&msg_sys, msg_compat)) | |
1934 | return -EFAULT; | |
89bddce5 SH |
1935 | } |
1936 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) | |
1da177e4 LT |
1937 | return -EFAULT; |
1938 | ||
6cb153ca | 1939 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
89bddce5 | 1940 | if (!sock) |
1da177e4 LT |
1941 | goto out; |
1942 | ||
1943 | /* do not move before msg_sys is valid */ | |
1944 | err = -EMSGSIZE; | |
1945 | if (msg_sys.msg_iovlen > UIO_MAXIOV) | |
1946 | goto out_put; | |
1947 | ||
89bddce5 | 1948 | /* Check whether to allocate the iovec area */ |
1da177e4 LT |
1949 | err = -ENOMEM; |
1950 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); | |
1951 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { | |
1952 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); | |
1953 | if (!iov) | |
1954 | goto out_put; | |
1955 | } | |
1956 | ||
1957 | /* This will also move the address data into kernel space */ | |
1958 | if (MSG_CMSG_COMPAT & flags) { | |
230b1839 YH |
1959 | err = verify_compat_iovec(&msg_sys, iov, |
1960 | (struct sockaddr *)&address, | |
1961 | VERIFY_READ); | |
1da177e4 | 1962 | } else |
230b1839 YH |
1963 | err = verify_iovec(&msg_sys, iov, |
1964 | (struct sockaddr *)&address, | |
1965 | VERIFY_READ); | |
89bddce5 | 1966 | if (err < 0) |
1da177e4 LT |
1967 | goto out_freeiov; |
1968 | total_len = err; | |
1969 | ||
1970 | err = -ENOBUFS; | |
1971 | ||
1972 | if (msg_sys.msg_controllen > INT_MAX) | |
1973 | goto out_freeiov; | |
89bddce5 | 1974 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1975 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 SH |
1976 | err = |
1977 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, | |
1978 | sizeof(ctl)); | |
1da177e4 LT |
1979 | if (err) |
1980 | goto out_freeiov; | |
1981 | ctl_buf = msg_sys.msg_control; | |
8920e8f9 | 1982 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1983 | } else if (ctl_len) { |
89bddce5 | 1984 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1985 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1986 | if (ctl_buf == NULL) |
1da177e4 LT |
1987 | goto out_freeiov; |
1988 | } | |
1989 | err = -EFAULT; | |
1990 | /* | |
1991 | * Careful! Before this, msg_sys.msg_control contains a user pointer. | |
1992 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted | |
1993 | * checking falls down on this. | |
1994 | */ | |
89bddce5 SH |
1995 | if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, |
1996 | ctl_len)) | |
1da177e4 LT |
1997 | goto out_freectl; |
1998 | msg_sys.msg_control = ctl_buf; | |
1999 | } | |
2000 | msg_sys.msg_flags = flags; | |
2001 | ||
2002 | if (sock->file->f_flags & O_NONBLOCK) | |
2003 | msg_sys.msg_flags |= MSG_DONTWAIT; | |
2004 | err = sock_sendmsg(sock, &msg_sys, total_len); | |
2005 | ||
2006 | out_freectl: | |
89bddce5 | 2007 | if (ctl_buf != ctl) |
1da177e4 LT |
2008 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2009 | out_freeiov: | |
2010 | if (iov != iovstack) | |
2011 | sock_kfree_s(sock->sk, iov, iov_size); | |
2012 | out_put: | |
6cb153ca | 2013 | fput_light(sock->file, fput_needed); |
89bddce5 | 2014 | out: |
1da177e4 LT |
2015 | return err; |
2016 | } | |
2017 | ||
a2e27255 ACM |
2018 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
2019 | struct msghdr *msg_sys, unsigned flags, int nosec) | |
1da177e4 | 2020 | { |
89bddce5 SH |
2021 | struct compat_msghdr __user *msg_compat = |
2022 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2023 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2024 | struct iovec *iov = iovstack; |
1da177e4 LT |
2025 | unsigned long cmsg_ptr; |
2026 | int err, iov_size, total_len, len; | |
2027 | ||
2028 | /* kernel mode address */ | |
230b1839 | 2029 | struct sockaddr_storage addr; |
1da177e4 LT |
2030 | |
2031 | /* user mode address pointers */ | |
2032 | struct sockaddr __user *uaddr; | |
2033 | int __user *uaddr_len; | |
89bddce5 | 2034 | |
1da177e4 | 2035 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2036 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2037 | return -EFAULT; |
89bddce5 | 2038 | } |
a2e27255 | 2039 | else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 2040 | return -EFAULT; |
1da177e4 | 2041 | |
1da177e4 | 2042 | err = -EMSGSIZE; |
a2e27255 ACM |
2043 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
2044 | goto out; | |
89bddce5 SH |
2045 | |
2046 | /* Check whether to allocate the iovec area */ | |
1da177e4 | 2047 | err = -ENOMEM; |
a2e27255 ACM |
2048 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
2049 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { | |
1da177e4 LT |
2050 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
2051 | if (!iov) | |
a2e27255 | 2052 | goto out; |
1da177e4 LT |
2053 | } |
2054 | ||
2055 | /* | |
89bddce5 SH |
2056 | * Save the user-mode address (verify_iovec will change the |
2057 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2058 | */ |
89bddce5 | 2059 | |
a2e27255 | 2060 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2061 | uaddr_len = COMPAT_NAMELEN(msg); |
2062 | if (MSG_CMSG_COMPAT & flags) { | |
a2e27255 | 2063 | err = verify_compat_iovec(msg_sys, iov, |
230b1839 YH |
2064 | (struct sockaddr *)&addr, |
2065 | VERIFY_WRITE); | |
1da177e4 | 2066 | } else |
a2e27255 | 2067 | err = verify_iovec(msg_sys, iov, |
230b1839 YH |
2068 | (struct sockaddr *)&addr, |
2069 | VERIFY_WRITE); | |
1da177e4 LT |
2070 | if (err < 0) |
2071 | goto out_freeiov; | |
89bddce5 | 2072 | total_len = err; |
1da177e4 | 2073 | |
a2e27255 ACM |
2074 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2075 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2076 | |
1da177e4 LT |
2077 | if (sock->file->f_flags & O_NONBLOCK) |
2078 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2079 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2080 | total_len, flags); | |
1da177e4 LT |
2081 | if (err < 0) |
2082 | goto out_freeiov; | |
2083 | len = err; | |
2084 | ||
2085 | if (uaddr != NULL) { | |
230b1839 | 2086 | err = move_addr_to_user((struct sockaddr *)&addr, |
a2e27255 | 2087 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2088 | uaddr_len); |
1da177e4 LT |
2089 | if (err < 0) |
2090 | goto out_freeiov; | |
2091 | } | |
a2e27255 | 2092 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2093 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2094 | if (err) |
2095 | goto out_freeiov; | |
2096 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2097 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2098 | &msg_compat->msg_controllen); |
2099 | else | |
a2e27255 | 2100 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2101 | &msg->msg_controllen); |
2102 | if (err) | |
2103 | goto out_freeiov; | |
2104 | err = len; | |
2105 | ||
2106 | out_freeiov: | |
2107 | if (iov != iovstack) | |
2108 | sock_kfree_s(sock->sk, iov, iov_size); | |
a2e27255 ACM |
2109 | out: |
2110 | return err; | |
2111 | } | |
2112 | ||
2113 | /* | |
2114 | * BSD recvmsg interface | |
2115 | */ | |
2116 | ||
2117 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2118 | unsigned int, flags) | |
2119 | { | |
2120 | int fput_needed, err; | |
2121 | struct msghdr msg_sys; | |
2122 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2123 | ||
2124 | if (!sock) | |
2125 | goto out; | |
2126 | ||
2127 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2128 | ||
6cb153ca | 2129 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2130 | out: |
2131 | return err; | |
2132 | } | |
2133 | ||
a2e27255 ACM |
2134 | /* |
2135 | * Linux recvmmsg interface | |
2136 | */ | |
2137 | ||
2138 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2139 | unsigned int flags, struct timespec *timeout) | |
2140 | { | |
2141 | int fput_needed, err, datagrams; | |
2142 | struct socket *sock; | |
2143 | struct mmsghdr __user *entry; | |
d7256d0e | 2144 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2145 | struct msghdr msg_sys; |
2146 | struct timespec end_time; | |
2147 | ||
2148 | if (timeout && | |
2149 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2150 | timeout->tv_nsec)) | |
2151 | return -EINVAL; | |
2152 | ||
2153 | datagrams = 0; | |
2154 | ||
2155 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2156 | if (!sock) | |
2157 | return err; | |
2158 | ||
2159 | err = sock_error(sock->sk); | |
2160 | if (err) | |
2161 | goto out_put; | |
2162 | ||
2163 | entry = mmsg; | |
d7256d0e | 2164 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2165 | |
2166 | while (datagrams < vlen) { | |
2167 | /* | |
2168 | * No need to ask LSM for more than the first datagram. | |
2169 | */ | |
d7256d0e JMG |
2170 | if (MSG_CMSG_COMPAT & flags) { |
2171 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
2172 | &msg_sys, flags, datagrams); | |
2173 | if (err < 0) | |
2174 | break; | |
2175 | err = __put_user(err, &compat_entry->msg_len); | |
2176 | ++compat_entry; | |
2177 | } else { | |
2178 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
2179 | &msg_sys, flags, datagrams); | |
2180 | if (err < 0) | |
2181 | break; | |
2182 | err = put_user(err, &entry->msg_len); | |
2183 | ++entry; | |
2184 | } | |
2185 | ||
a2e27255 ACM |
2186 | if (err) |
2187 | break; | |
a2e27255 ACM |
2188 | ++datagrams; |
2189 | ||
2190 | if (timeout) { | |
2191 | ktime_get_ts(timeout); | |
2192 | *timeout = timespec_sub(end_time, *timeout); | |
2193 | if (timeout->tv_sec < 0) { | |
2194 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2195 | break; | |
2196 | } | |
2197 | ||
2198 | /* Timeout, return less than vlen datagrams */ | |
2199 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2200 | break; | |
2201 | } | |
2202 | ||
2203 | /* Out of band data, return right away */ | |
2204 | if (msg_sys.msg_flags & MSG_OOB) | |
2205 | break; | |
2206 | } | |
2207 | ||
2208 | out_put: | |
2209 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2210 | |
a2e27255 ACM |
2211 | if (err == 0) |
2212 | return datagrams; | |
2213 | ||
2214 | if (datagrams != 0) { | |
2215 | /* | |
2216 | * We may return less entries than requested (vlen) if the | |
2217 | * sock is non block and there aren't enough datagrams... | |
2218 | */ | |
2219 | if (err != -EAGAIN) { | |
2220 | /* | |
2221 | * ... or if recvmsg returns an error after we | |
2222 | * received some datagrams, where we record the | |
2223 | * error to return on the next call or if the | |
2224 | * app asks about it using getsockopt(SO_ERROR). | |
2225 | */ | |
2226 | sock->sk->sk_err = -err; | |
2227 | } | |
2228 | ||
2229 | return datagrams; | |
2230 | } | |
2231 | ||
2232 | return err; | |
2233 | } | |
2234 | ||
2235 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2236 | unsigned int, vlen, unsigned int, flags, | |
2237 | struct timespec __user *, timeout) | |
2238 | { | |
2239 | int datagrams; | |
2240 | struct timespec timeout_sys; | |
2241 | ||
2242 | if (!timeout) | |
2243 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2244 | ||
2245 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2246 | return -EFAULT; | |
2247 | ||
2248 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2249 | ||
2250 | if (datagrams > 0 && | |
2251 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2252 | datagrams = -EFAULT; | |
2253 | ||
2254 | return datagrams; | |
2255 | } | |
2256 | ||
2257 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2258 | /* Argument list sizes for sys_socketcall */ |
2259 | #define AL(x) ((x) * sizeof(unsigned long)) | |
a2e27255 | 2260 | static const unsigned char nargs[20] = { |
89bddce5 SH |
2261 | AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
2262 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), | |
aaca0bdc | 2263 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
a2e27255 | 2264 | AL(4),AL(5) |
89bddce5 SH |
2265 | }; |
2266 | ||
1da177e4 LT |
2267 | #undef AL |
2268 | ||
2269 | /* | |
89bddce5 | 2270 | * System call vectors. |
1da177e4 LT |
2271 | * |
2272 | * Argument checking cleaned up. Saved 20% in size. | |
2273 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2274 | * it is set by the callees. |
1da177e4 LT |
2275 | */ |
2276 | ||
3e0fa65f | 2277 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2278 | { |
2279 | unsigned long a[6]; | |
89bddce5 | 2280 | unsigned long a0, a1; |
1da177e4 | 2281 | int err; |
47379052 | 2282 | unsigned int len; |
1da177e4 | 2283 | |
a2e27255 | 2284 | if (call < 1 || call > SYS_RECVMMSG) |
1da177e4 LT |
2285 | return -EINVAL; |
2286 | ||
47379052 AV |
2287 | len = nargs[call]; |
2288 | if (len > sizeof(a)) | |
2289 | return -EINVAL; | |
2290 | ||
1da177e4 | 2291 | /* copy_from_user should be SMP safe. */ |
47379052 | 2292 | if (copy_from_user(a, args, len)) |
1da177e4 | 2293 | return -EFAULT; |
3ec3b2fb | 2294 | |
f3298dc4 | 2295 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2296 | |
89bddce5 SH |
2297 | a0 = a[0]; |
2298 | a1 = a[1]; | |
2299 | ||
2300 | switch (call) { | |
2301 | case SYS_SOCKET: | |
2302 | err = sys_socket(a0, a1, a[2]); | |
2303 | break; | |
2304 | case SYS_BIND: | |
2305 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2306 | break; | |
2307 | case SYS_CONNECT: | |
2308 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2309 | break; | |
2310 | case SYS_LISTEN: | |
2311 | err = sys_listen(a0, a1); | |
2312 | break; | |
2313 | case SYS_ACCEPT: | |
de11defe UD |
2314 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2315 | (int __user *)a[2], 0); | |
89bddce5 SH |
2316 | break; |
2317 | case SYS_GETSOCKNAME: | |
2318 | err = | |
2319 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2320 | (int __user *)a[2]); | |
2321 | break; | |
2322 | case SYS_GETPEERNAME: | |
2323 | err = | |
2324 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2325 | (int __user *)a[2]); | |
2326 | break; | |
2327 | case SYS_SOCKETPAIR: | |
2328 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2329 | break; | |
2330 | case SYS_SEND: | |
2331 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2332 | break; | |
2333 | case SYS_SENDTO: | |
2334 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2335 | (struct sockaddr __user *)a[4], a[5]); | |
2336 | break; | |
2337 | case SYS_RECV: | |
2338 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2339 | break; | |
2340 | case SYS_RECVFROM: | |
2341 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2342 | (struct sockaddr __user *)a[4], | |
2343 | (int __user *)a[5]); | |
2344 | break; | |
2345 | case SYS_SHUTDOWN: | |
2346 | err = sys_shutdown(a0, a1); | |
2347 | break; | |
2348 | case SYS_SETSOCKOPT: | |
2349 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2350 | break; | |
2351 | case SYS_GETSOCKOPT: | |
2352 | err = | |
2353 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2354 | (int __user *)a[4]); | |
2355 | break; | |
2356 | case SYS_SENDMSG: | |
2357 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2358 | break; | |
2359 | case SYS_RECVMSG: | |
2360 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2361 | break; | |
a2e27255 ACM |
2362 | case SYS_RECVMMSG: |
2363 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2364 | (struct timespec __user *)a[4]); | |
2365 | break; | |
de11defe UD |
2366 | case SYS_ACCEPT4: |
2367 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2368 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2369 | break; |
89bddce5 SH |
2370 | default: |
2371 | err = -EINVAL; | |
2372 | break; | |
1da177e4 LT |
2373 | } |
2374 | return err; | |
2375 | } | |
2376 | ||
89bddce5 | 2377 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2378 | |
55737fda SH |
2379 | /** |
2380 | * sock_register - add a socket protocol handler | |
2381 | * @ops: description of protocol | |
2382 | * | |
1da177e4 LT |
2383 | * This function is called by a protocol handler that wants to |
2384 | * advertise its address family, and have it linked into the | |
55737fda SH |
2385 | * socket interface. The value ops->family coresponds to the |
2386 | * socket system call protocol family. | |
1da177e4 | 2387 | */ |
f0fd27d4 | 2388 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2389 | { |
2390 | int err; | |
2391 | ||
2392 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2393 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2394 | NPROTO); | |
1da177e4 LT |
2395 | return -ENOBUFS; |
2396 | } | |
55737fda SH |
2397 | |
2398 | spin_lock(&net_family_lock); | |
2399 | if (net_families[ops->family]) | |
2400 | err = -EEXIST; | |
2401 | else { | |
89bddce5 | 2402 | net_families[ops->family] = ops; |
1da177e4 LT |
2403 | err = 0; |
2404 | } | |
55737fda SH |
2405 | spin_unlock(&net_family_lock); |
2406 | ||
89bddce5 | 2407 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2408 | return err; |
2409 | } | |
2410 | ||
55737fda SH |
2411 | /** |
2412 | * sock_unregister - remove a protocol handler | |
2413 | * @family: protocol family to remove | |
2414 | * | |
1da177e4 LT |
2415 | * This function is called by a protocol handler that wants to |
2416 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2417 | * new socket creation. |
2418 | * | |
2419 | * If protocol handler is a module, then it can use module reference | |
2420 | * counts to protect against new references. If protocol handler is not | |
2421 | * a module then it needs to provide its own protection in | |
2422 | * the ops->create routine. | |
1da177e4 | 2423 | */ |
f0fd27d4 | 2424 | void sock_unregister(int family) |
1da177e4 | 2425 | { |
f0fd27d4 | 2426 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2427 | |
55737fda | 2428 | spin_lock(&net_family_lock); |
89bddce5 | 2429 | net_families[family] = NULL; |
55737fda SH |
2430 | spin_unlock(&net_family_lock); |
2431 | ||
2432 | synchronize_rcu(); | |
2433 | ||
89bddce5 | 2434 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 LT |
2435 | } |
2436 | ||
77d76ea3 | 2437 | static int __init sock_init(void) |
1da177e4 LT |
2438 | { |
2439 | /* | |
89bddce5 | 2440 | * Initialize sock SLAB cache. |
1da177e4 | 2441 | */ |
89bddce5 | 2442 | |
1da177e4 LT |
2443 | sk_init(); |
2444 | ||
1da177e4 | 2445 | /* |
89bddce5 | 2446 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2447 | */ |
2448 | skb_init(); | |
1da177e4 LT |
2449 | |
2450 | /* | |
89bddce5 | 2451 | * Initialize the protocols module. |
1da177e4 LT |
2452 | */ |
2453 | ||
2454 | init_inodecache(); | |
2455 | register_filesystem(&sock_fs_type); | |
2456 | sock_mnt = kern_mount(&sock_fs_type); | |
77d76ea3 AK |
2457 | |
2458 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2459 | */ |
2460 | ||
2461 | #ifdef CONFIG_NETFILTER | |
2462 | netfilter_init(); | |
2463 | #endif | |
cbeb321a DM |
2464 | |
2465 | return 0; | |
1da177e4 LT |
2466 | } |
2467 | ||
77d76ea3 AK |
2468 | core_initcall(sock_init); /* early initcall */ |
2469 | ||
1da177e4 LT |
2470 | #ifdef CONFIG_PROC_FS |
2471 | void socket_seq_show(struct seq_file *seq) | |
2472 | { | |
2473 | int cpu; | |
2474 | int counter = 0; | |
2475 | ||
6f912042 | 2476 | for_each_possible_cpu(cpu) |
89bddce5 | 2477 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2478 | |
2479 | /* It can be negative, by the way. 8) */ | |
2480 | if (counter < 0) | |
2481 | counter = 0; | |
2482 | ||
2483 | seq_printf(seq, "sockets: used %d\n", counter); | |
2484 | } | |
89bddce5 | 2485 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2486 | |
89bbfc95 | 2487 | #ifdef CONFIG_COMPAT |
6b96018b AB |
2488 | static int do_siocgstamp(struct net *net, struct socket *sock, |
2489 | unsigned int cmd, struct compat_timeval __user *up) | |
7a229387 | 2490 | { |
7a229387 AB |
2491 | mm_segment_t old_fs = get_fs(); |
2492 | struct timeval ktv; | |
2493 | int err; | |
2494 | ||
2495 | set_fs(KERNEL_DS); | |
6b96018b | 2496 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 AB |
2497 | set_fs(old_fs); |
2498 | if (!err) { | |
2499 | err = put_user(ktv.tv_sec, &up->tv_sec); | |
2500 | err |= __put_user(ktv.tv_usec, &up->tv_usec); | |
2501 | } | |
2502 | return err; | |
2503 | } | |
2504 | ||
6b96018b AB |
2505 | static int do_siocgstampns(struct net *net, struct socket *sock, |
2506 | unsigned int cmd, struct compat_timespec __user *up) | |
7a229387 | 2507 | { |
7a229387 AB |
2508 | mm_segment_t old_fs = get_fs(); |
2509 | struct timespec kts; | |
2510 | int err; | |
2511 | ||
2512 | set_fs(KERNEL_DS); | |
6b96018b | 2513 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 AB |
2514 | set_fs(old_fs); |
2515 | if (!err) { | |
2516 | err = put_user(kts.tv_sec, &up->tv_sec); | |
2517 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); | |
2518 | } | |
2519 | return err; | |
2520 | } | |
2521 | ||
6b96018b | 2522 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2523 | { |
2524 | struct ifreq __user *uifr; | |
2525 | int err; | |
2526 | ||
2527 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2528 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2529 | return -EFAULT; |
2530 | ||
6b96018b | 2531 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2532 | if (err) |
2533 | return err; | |
2534 | ||
6b96018b | 2535 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2536 | return -EFAULT; |
2537 | ||
2538 | return 0; | |
2539 | } | |
2540 | ||
6b96018b | 2541 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2542 | { |
6b96018b | 2543 | struct compat_ifconf ifc32; |
7a229387 AB |
2544 | struct ifconf ifc; |
2545 | struct ifconf __user *uifc; | |
6b96018b | 2546 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2547 | struct ifreq __user *ifr; |
2548 | unsigned int i, j; | |
2549 | int err; | |
2550 | ||
6b96018b | 2551 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2552 | return -EFAULT; |
2553 | ||
2554 | if (ifc32.ifcbuf == 0) { | |
2555 | ifc32.ifc_len = 0; | |
2556 | ifc.ifc_len = 0; | |
2557 | ifc.ifc_req = NULL; | |
2558 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2559 | } else { | |
6b96018b | 2560 | size_t len =((ifc32.ifc_len / sizeof (struct compat_ifreq)) + 1) * |
7a229387 AB |
2561 | sizeof (struct ifreq); |
2562 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); | |
2563 | ifc.ifc_len = len; | |
2564 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2565 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
6b96018b AB |
2566 | for (i = 0; i < ifc32.ifc_len; i += sizeof (struct compat_ifreq)) { |
2567 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2568 | return -EFAULT; |
2569 | ifr++; | |
2570 | ifr32++; | |
2571 | } | |
2572 | } | |
2573 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2574 | return -EFAULT; | |
2575 | ||
6b96018b | 2576 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2577 | if (err) |
2578 | return err; | |
2579 | ||
2580 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2581 | return -EFAULT; | |
2582 | ||
2583 | ifr = ifc.ifc_req; | |
2584 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2585 | for (i = 0, j = 0; | |
6b96018b AB |
2586 | i + sizeof (struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2587 | i += sizeof (struct compat_ifreq), j += sizeof (struct ifreq)) { | |
2588 | if (copy_in_user(ifr32, ifr, sizeof (struct compat_ifreq))) | |
7a229387 AB |
2589 | return -EFAULT; |
2590 | ifr32++; | |
2591 | ifr++; | |
2592 | } | |
2593 | ||
2594 | if (ifc32.ifcbuf == 0) { | |
2595 | /* Translate from 64-bit structure multiple to | |
2596 | * a 32-bit one. | |
2597 | */ | |
2598 | i = ifc.ifc_len; | |
6b96018b | 2599 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2600 | ifc32.ifc_len = i; |
2601 | } else { | |
2602 | ifc32.ifc_len = i; | |
2603 | } | |
6b96018b | 2604 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2605 | return -EFAULT; |
2606 | ||
2607 | return 0; | |
2608 | } | |
2609 | ||
6b96018b | 2610 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 AB |
2611 | { |
2612 | struct ifreq __user *ifr; | |
7a229387 AB |
2613 | u32 data; |
2614 | void __user *datap; | |
2615 | ||
2616 | ifr = compat_alloc_user_space(sizeof(*ifr)); | |
7a229387 AB |
2617 | |
2618 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2619 | return -EFAULT; | |
2620 | ||
2621 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2622 | return -EFAULT; | |
2623 | ||
2624 | datap = compat_ptr(data); | |
2625 | if (put_user(datap, &ifr->ifr_ifru.ifru_data)) | |
2626 | return -EFAULT; | |
2627 | ||
6b96018b | 2628 | return dev_ioctl(net, SIOCETHTOOL, ifr); |
7a229387 AB |
2629 | } |
2630 | ||
7a50a240 AB |
2631 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2632 | { | |
2633 | void __user *uptr; | |
2634 | compat_uptr_t uptr32; | |
2635 | struct ifreq __user *uifr; | |
2636 | ||
2637 | uifr = compat_alloc_user_space(sizeof (*uifr)); | |
2638 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2639 | return -EFAULT; | |
2640 | ||
2641 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2642 | return -EFAULT; | |
2643 | ||
2644 | uptr = compat_ptr(uptr32); | |
2645 | ||
2646 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2647 | return -EFAULT; | |
2648 | ||
2649 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2650 | } | |
2651 | ||
6b96018b AB |
2652 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2653 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2654 | { |
2655 | struct ifreq kifr; | |
2656 | struct ifreq __user *uifr; | |
7a229387 AB |
2657 | mm_segment_t old_fs; |
2658 | int err; | |
2659 | u32 data; | |
2660 | void __user *datap; | |
2661 | ||
2662 | switch (cmd) { | |
2663 | case SIOCBONDENSLAVE: | |
2664 | case SIOCBONDRELEASE: | |
2665 | case SIOCBONDSETHWADDR: | |
2666 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2667 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2668 | return -EFAULT; |
2669 | ||
2670 | old_fs = get_fs(); | |
2671 | set_fs (KERNEL_DS); | |
6b96018b | 2672 | err = dev_ioctl(net, cmd, &kifr); |
7a229387 AB |
2673 | set_fs (old_fs); |
2674 | ||
2675 | return err; | |
2676 | case SIOCBONDSLAVEINFOQUERY: | |
2677 | case SIOCBONDINFOQUERY: | |
2678 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2679 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2680 | return -EFAULT; | |
2681 | ||
2682 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2683 | return -EFAULT; | |
2684 | ||
2685 | datap = compat_ptr(data); | |
2686 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2687 | return -EFAULT; | |
2688 | ||
6b96018b | 2689 | return dev_ioctl(net, cmd, uifr); |
7a229387 AB |
2690 | default: |
2691 | return -EINVAL; | |
2692 | }; | |
2693 | } | |
2694 | ||
6b96018b AB |
2695 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2696 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2697 | { |
2698 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2699 | char tmp_buf[IFNAMSIZ]; |
2700 | void __user *data64; | |
2701 | u32 data32; | |
2702 | ||
2703 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2704 | IFNAMSIZ)) | |
2705 | return -EFAULT; | |
2706 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2707 | return -EFAULT; | |
2708 | data64 = compat_ptr(data32); | |
2709 | ||
2710 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2711 | ||
2712 | /* Don't check these user accesses, just let that get trapped | |
2713 | * in the ioctl handler instead. | |
2714 | */ | |
2715 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2716 | IFNAMSIZ)) | |
2717 | return -EFAULT; | |
2718 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2719 | return -EFAULT; | |
2720 | ||
6b96018b | 2721 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2722 | } |
2723 | ||
6b96018b AB |
2724 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2725 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2726 | { |
a2116ed2 | 2727 | struct ifreq __user *uifr; |
7a229387 AB |
2728 | int err; |
2729 | ||
a2116ed2 AB |
2730 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2731 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2732 | return -EFAULT; | |
2733 | ||
2734 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2735 | ||
7a229387 AB |
2736 | if (!err) { |
2737 | switch (cmd) { | |
2738 | case SIOCGIFFLAGS: | |
2739 | case SIOCGIFMETRIC: | |
2740 | case SIOCGIFMTU: | |
2741 | case SIOCGIFMEM: | |
2742 | case SIOCGIFHWADDR: | |
2743 | case SIOCGIFINDEX: | |
2744 | case SIOCGIFADDR: | |
2745 | case SIOCGIFBRDADDR: | |
2746 | case SIOCGIFDSTADDR: | |
2747 | case SIOCGIFNETMASK: | |
fab2532b | 2748 | case SIOCGIFPFLAGS: |
7a229387 | 2749 | case SIOCGIFTXQLEN: |
fab2532b AB |
2750 | case SIOCGMIIPHY: |
2751 | case SIOCGMIIREG: | |
a2116ed2 | 2752 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2753 | err = -EFAULT; |
2754 | break; | |
2755 | } | |
2756 | } | |
2757 | return err; | |
2758 | } | |
2759 | ||
a2116ed2 AB |
2760 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2761 | struct compat_ifreq __user *uifr32) | |
2762 | { | |
2763 | struct ifreq ifr; | |
2764 | struct compat_ifmap __user *uifmap32; | |
2765 | mm_segment_t old_fs; | |
2766 | int err; | |
2767 | ||
2768 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2769 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
2770 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2771 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2772 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2773 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2774 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2775 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
2776 | if (err) | |
2777 | return -EFAULT; | |
2778 | ||
2779 | old_fs = get_fs(); | |
2780 | set_fs (KERNEL_DS); | |
2781 | err = dev_ioctl(net, cmd, (void __user *)&ifr); | |
2782 | set_fs (old_fs); | |
2783 | ||
2784 | if (cmd == SIOCGIFMAP && !err) { | |
2785 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
2786 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2787 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2788 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2789 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2790 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2791 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
2792 | if (err) | |
2793 | err = -EFAULT; | |
2794 | } | |
2795 | return err; | |
2796 | } | |
2797 | ||
2798 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
2799 | { | |
2800 | void __user *uptr; | |
2801 | compat_uptr_t uptr32; | |
2802 | struct ifreq __user *uifr; | |
2803 | ||
2804 | uifr = compat_alloc_user_space(sizeof (*uifr)); | |
2805 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2806 | return -EFAULT; | |
2807 | ||
2808 | if (get_user(uptr32, &uifr32->ifr_data)) | |
2809 | return -EFAULT; | |
2810 | ||
2811 | uptr = compat_ptr(uptr32); | |
2812 | ||
2813 | if (put_user(uptr, &uifr->ifr_data)) | |
2814 | return -EFAULT; | |
2815 | ||
2816 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
2817 | } | |
2818 | ||
7a229387 AB |
2819 | struct rtentry32 { |
2820 | u32 rt_pad1; | |
2821 | struct sockaddr rt_dst; /* target address */ | |
2822 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
2823 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
2824 | unsigned short rt_flags; | |
2825 | short rt_pad2; | |
2826 | u32 rt_pad3; | |
2827 | unsigned char rt_tos; | |
2828 | unsigned char rt_class; | |
2829 | short rt_pad4; | |
2830 | short rt_metric; /* +1 for binary compatibility! */ | |
2831 | /* char * */ u32 rt_dev; /* forcing the device at add */ | |
2832 | u32 rt_mtu; /* per route MTU/Window */ | |
2833 | u32 rt_window; /* Window clamping */ | |
2834 | unsigned short rt_irtt; /* Initial RTT */ | |
2835 | }; | |
2836 | ||
2837 | struct in6_rtmsg32 { | |
2838 | struct in6_addr rtmsg_dst; | |
2839 | struct in6_addr rtmsg_src; | |
2840 | struct in6_addr rtmsg_gateway; | |
2841 | u32 rtmsg_type; | |
2842 | u16 rtmsg_dst_len; | |
2843 | u16 rtmsg_src_len; | |
2844 | u32 rtmsg_metric; | |
2845 | u32 rtmsg_info; | |
2846 | u32 rtmsg_flags; | |
2847 | s32 rtmsg_ifindex; | |
2848 | }; | |
2849 | ||
6b96018b AB |
2850 | static int routing_ioctl(struct net *net, struct socket *sock, |
2851 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
2852 | { |
2853 | int ret; | |
2854 | void *r = NULL; | |
2855 | struct in6_rtmsg r6; | |
2856 | struct rtentry r4; | |
2857 | char devname[16]; | |
2858 | u32 rtdev; | |
2859 | mm_segment_t old_fs = get_fs(); | |
2860 | ||
6b96018b AB |
2861 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
2862 | struct in6_rtmsg32 __user *ur6 = argp; | |
7a229387 AB |
2863 | ret = copy_from_user (&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
2864 | 3 * sizeof(struct in6_addr)); | |
2865 | ret |= __get_user (r6.rtmsg_type, &(ur6->rtmsg_type)); | |
2866 | ret |= __get_user (r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
2867 | ret |= __get_user (r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
2868 | ret |= __get_user (r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
2869 | ret |= __get_user (r6.rtmsg_info, &(ur6->rtmsg_info)); | |
2870 | ret |= __get_user (r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
2871 | ret |= __get_user (r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
2872 | ||
2873 | r = (void *) &r6; | |
2874 | } else { /* ipv4 */ | |
6b96018b | 2875 | struct rtentry32 __user *ur4 = argp; |
7a229387 AB |
2876 | ret = copy_from_user (&r4.rt_dst, &(ur4->rt_dst), |
2877 | 3 * sizeof(struct sockaddr)); | |
2878 | ret |= __get_user (r4.rt_flags, &(ur4->rt_flags)); | |
2879 | ret |= __get_user (r4.rt_metric, &(ur4->rt_metric)); | |
2880 | ret |= __get_user (r4.rt_mtu, &(ur4->rt_mtu)); | |
2881 | ret |= __get_user (r4.rt_window, &(ur4->rt_window)); | |
2882 | ret |= __get_user (r4.rt_irtt, &(ur4->rt_irtt)); | |
2883 | ret |= __get_user (rtdev, &(ur4->rt_dev)); | |
2884 | if (rtdev) { | |
2885 | ret |= copy_from_user (devname, compat_ptr(rtdev), 15); | |
2886 | r4.rt_dev = devname; devname[15] = 0; | |
2887 | } else | |
2888 | r4.rt_dev = NULL; | |
2889 | ||
2890 | r = (void *) &r4; | |
2891 | } | |
2892 | ||
2893 | if (ret) { | |
2894 | ret = -EFAULT; | |
2895 | goto out; | |
2896 | } | |
2897 | ||
2898 | set_fs (KERNEL_DS); | |
6b96018b | 2899 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
7a229387 AB |
2900 | set_fs (old_fs); |
2901 | ||
2902 | out: | |
7a229387 AB |
2903 | return ret; |
2904 | } | |
2905 | ||
2906 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
2907 | * for some operations; this forces use of the newer bridge-utils that | |
2908 | * use compatiable ioctls | |
2909 | */ | |
6b96018b | 2910 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 2911 | { |
6b96018b | 2912 | compat_ulong_t tmp; |
7a229387 | 2913 | |
6b96018b | 2914 | if (get_user(tmp, argp)) |
7a229387 AB |
2915 | return -EFAULT; |
2916 | if (tmp == BRCTL_GET_VERSION) | |
2917 | return BRCTL_VERSION + 1; | |
2918 | return -EINVAL; | |
2919 | } | |
2920 | ||
6b96018b AB |
2921 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
2922 | unsigned int cmd, unsigned long arg) | |
2923 | { | |
2924 | void __user *argp = compat_ptr(arg); | |
2925 | struct sock *sk = sock->sk; | |
2926 | struct net *net = sock_net(sk); | |
7a229387 | 2927 | |
6b96018b AB |
2928 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
2929 | return siocdevprivate_ioctl(net, cmd, argp); | |
2930 | ||
2931 | switch (cmd) { | |
2932 | case SIOCSIFBR: | |
2933 | case SIOCGIFBR: | |
2934 | return old_bridge_ioctl(argp); | |
2935 | case SIOCGIFNAME: | |
2936 | return dev_ifname32(net, argp); | |
2937 | case SIOCGIFCONF: | |
2938 | return dev_ifconf(net, argp); | |
2939 | case SIOCETHTOOL: | |
2940 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
2941 | case SIOCWANDEV: |
2942 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
2943 | case SIOCGIFMAP: |
2944 | case SIOCSIFMAP: | |
2945 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
2946 | case SIOCBONDENSLAVE: |
2947 | case SIOCBONDRELEASE: | |
2948 | case SIOCBONDSETHWADDR: | |
2949 | case SIOCBONDSLAVEINFOQUERY: | |
2950 | case SIOCBONDINFOQUERY: | |
2951 | case SIOCBONDCHANGEACTIVE: | |
2952 | return bond_ioctl(net, cmd, argp); | |
2953 | case SIOCADDRT: | |
2954 | case SIOCDELRT: | |
2955 | return routing_ioctl(net, sock, cmd, argp); | |
2956 | case SIOCGSTAMP: | |
2957 | return do_siocgstamp(net, sock, cmd, argp); | |
2958 | case SIOCGSTAMPNS: | |
2959 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
2960 | case SIOCSHWTSTAMP: |
2961 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
2962 | |
2963 | case FIOSETOWN: | |
2964 | case SIOCSPGRP: | |
2965 | case FIOGETOWN: | |
2966 | case SIOCGPGRP: | |
2967 | case SIOCBRADDBR: | |
2968 | case SIOCBRDELBR: | |
2969 | case SIOCGIFVLAN: | |
2970 | case SIOCSIFVLAN: | |
2971 | case SIOCADDDLCI: | |
2972 | case SIOCDELDLCI: | |
2973 | return sock_ioctl(file, cmd, arg); | |
2974 | ||
2975 | case SIOCGIFFLAGS: | |
2976 | case SIOCSIFFLAGS: | |
2977 | case SIOCGIFMETRIC: | |
2978 | case SIOCSIFMETRIC: | |
2979 | case SIOCGIFMTU: | |
2980 | case SIOCSIFMTU: | |
2981 | case SIOCGIFMEM: | |
2982 | case SIOCSIFMEM: | |
2983 | case SIOCGIFHWADDR: | |
2984 | case SIOCSIFHWADDR: | |
2985 | case SIOCADDMULTI: | |
2986 | case SIOCDELMULTI: | |
2987 | case SIOCGIFINDEX: | |
6b96018b AB |
2988 | case SIOCGIFADDR: |
2989 | case SIOCSIFADDR: | |
2990 | case SIOCSIFHWBROADCAST: | |
6b96018b | 2991 | case SIOCDIFADDR: |
6b96018b AB |
2992 | case SIOCGIFBRDADDR: |
2993 | case SIOCSIFBRDADDR: | |
2994 | case SIOCGIFDSTADDR: | |
2995 | case SIOCSIFDSTADDR: | |
2996 | case SIOCGIFNETMASK: | |
2997 | case SIOCSIFNETMASK: | |
2998 | case SIOCSIFPFLAGS: | |
2999 | case SIOCGIFPFLAGS: | |
3000 | case SIOCGIFTXQLEN: | |
3001 | case SIOCSIFTXQLEN: | |
3002 | case SIOCBRADDIF: | |
3003 | case SIOCBRDELIF: | |
9177efd3 AB |
3004 | case SIOCSIFNAME: |
3005 | case SIOCGMIIPHY: | |
3006 | case SIOCGMIIREG: | |
3007 | case SIOCSMIIREG: | |
6b96018b | 3008 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3009 | |
6b96018b AB |
3010 | case SIOCSARP: |
3011 | case SIOCGARP: | |
3012 | case SIOCDARP: | |
6b96018b | 3013 | case SIOCATMARK: |
9177efd3 AB |
3014 | return sock_do_ioctl(net, sock, cmd, arg); |
3015 | } | |
3016 | ||
3017 | /* Prevent warning from compat_sys_ioctl, these always | |
3018 | * result in -EINVAL in the native case anyway. */ | |
3019 | switch (cmd) { | |
3020 | case SIOCRTMSG: | |
3021 | case SIOCGIFCOUNT: | |
6b96018b AB |
3022 | case SIOCSRARP: |
3023 | case SIOCGRARP: | |
3024 | case SIOCDRARP: | |
9177efd3 AB |
3025 | case SIOCSIFLINK: |
3026 | case SIOCGIFSLAVE: | |
3027 | case SIOCSIFSLAVE: | |
3028 | return -EINVAL; | |
6b96018b AB |
3029 | } |
3030 | ||
3031 | return -ENOIOCTLCMD; | |
3032 | } | |
7a229387 | 3033 | |
89bbfc95 | 3034 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
89bddce5 | 3035 | unsigned long arg) |
89bbfc95 SP |
3036 | { |
3037 | struct socket *sock = file->private_data; | |
3038 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3039 | struct sock *sk; |
3040 | struct net *net; | |
3041 | ||
3042 | sk = sock->sk; | |
3043 | net = sock_net(sk); | |
89bbfc95 SP |
3044 | |
3045 | if (sock->ops->compat_ioctl) | |
3046 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3047 | ||
87de87d5 DM |
3048 | if (ret == -ENOIOCTLCMD && |
3049 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3050 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3051 | ||
6b96018b AB |
3052 | if (ret == -ENOIOCTLCMD) |
3053 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3054 | ||
89bbfc95 SP |
3055 | return ret; |
3056 | } | |
3057 | #endif | |
3058 | ||
ac5a488e SS |
3059 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3060 | { | |
3061 | return sock->ops->bind(sock, addr, addrlen); | |
3062 | } | |
3063 | ||
3064 | int kernel_listen(struct socket *sock, int backlog) | |
3065 | { | |
3066 | return sock->ops->listen(sock, backlog); | |
3067 | } | |
3068 | ||
3069 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3070 | { | |
3071 | struct sock *sk = sock->sk; | |
3072 | int err; | |
3073 | ||
3074 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3075 | newsock); | |
3076 | if (err < 0) | |
3077 | goto done; | |
3078 | ||
3079 | err = sock->ops->accept(sock, *newsock, flags); | |
3080 | if (err < 0) { | |
3081 | sock_release(*newsock); | |
fa8705b0 | 3082 | *newsock = NULL; |
ac5a488e SS |
3083 | goto done; |
3084 | } | |
3085 | ||
3086 | (*newsock)->ops = sock->ops; | |
1b08534e | 3087 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3088 | |
3089 | done: | |
3090 | return err; | |
3091 | } | |
3092 | ||
3093 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3094 | int flags) |
ac5a488e SS |
3095 | { |
3096 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3097 | } | |
3098 | ||
3099 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3100 | int *addrlen) | |
3101 | { | |
3102 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3103 | } | |
3104 | ||
3105 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3106 | int *addrlen) | |
3107 | { | |
3108 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3109 | } | |
3110 | ||
3111 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3112 | char *optval, int *optlen) | |
3113 | { | |
3114 | mm_segment_t oldfs = get_fs(); | |
3115 | int err; | |
3116 | ||
3117 | set_fs(KERNEL_DS); | |
3118 | if (level == SOL_SOCKET) | |
3119 | err = sock_getsockopt(sock, level, optname, optval, optlen); | |
3120 | else | |
3121 | err = sock->ops->getsockopt(sock, level, optname, optval, | |
3122 | optlen); | |
3123 | set_fs(oldfs); | |
3124 | return err; | |
3125 | } | |
3126 | ||
3127 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3128 | char *optval, unsigned int optlen) |
ac5a488e SS |
3129 | { |
3130 | mm_segment_t oldfs = get_fs(); | |
3131 | int err; | |
3132 | ||
3133 | set_fs(KERNEL_DS); | |
3134 | if (level == SOL_SOCKET) | |
3135 | err = sock_setsockopt(sock, level, optname, optval, optlen); | |
3136 | else | |
3137 | err = sock->ops->setsockopt(sock, level, optname, optval, | |
3138 | optlen); | |
3139 | set_fs(oldfs); | |
3140 | return err; | |
3141 | } | |
3142 | ||
3143 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3144 | size_t size, int flags) | |
3145 | { | |
3146 | if (sock->ops->sendpage) | |
3147 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3148 | ||
3149 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3150 | } | |
3151 | ||
3152 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3153 | { | |
3154 | mm_segment_t oldfs = get_fs(); | |
3155 | int err; | |
3156 | ||
3157 | set_fs(KERNEL_DS); | |
3158 | err = sock->ops->ioctl(sock, cmd, arg); | |
3159 | set_fs(oldfs); | |
3160 | ||
3161 | return err; | |
3162 | } | |
3163 | ||
91cf45f0 TM |
3164 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3165 | { | |
3166 | return sock->ops->shutdown(sock, how); | |
3167 | } | |
3168 | ||
1da177e4 LT |
3169 | EXPORT_SYMBOL(sock_create); |
3170 | EXPORT_SYMBOL(sock_create_kern); | |
3171 | EXPORT_SYMBOL(sock_create_lite); | |
3172 | EXPORT_SYMBOL(sock_map_fd); | |
3173 | EXPORT_SYMBOL(sock_recvmsg); | |
3174 | EXPORT_SYMBOL(sock_register); | |
3175 | EXPORT_SYMBOL(sock_release); | |
3176 | EXPORT_SYMBOL(sock_sendmsg); | |
3177 | EXPORT_SYMBOL(sock_unregister); | |
3178 | EXPORT_SYMBOL(sock_wake_async); | |
3179 | EXPORT_SYMBOL(sockfd_lookup); | |
3180 | EXPORT_SYMBOL(kernel_sendmsg); | |
3181 | EXPORT_SYMBOL(kernel_recvmsg); | |
ac5a488e SS |
3182 | EXPORT_SYMBOL(kernel_bind); |
3183 | EXPORT_SYMBOL(kernel_listen); | |
3184 | EXPORT_SYMBOL(kernel_accept); | |
3185 | EXPORT_SYMBOL(kernel_connect); | |
3186 | EXPORT_SYMBOL(kernel_getsockname); | |
3187 | EXPORT_SYMBOL(kernel_getpeername); | |
3188 | EXPORT_SYMBOL(kernel_getsockopt); | |
3189 | EXPORT_SYMBOL(kernel_setsockopt); | |
3190 | EXPORT_SYMBOL(kernel_sendpage); | |
3191 | EXPORT_SYMBOL(kernel_sock_ioctl); | |
91cf45f0 | 3192 | EXPORT_SYMBOL(kernel_sock_shutdown); |