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 | |
c23fbb6b ED |
315 | /* |
316 | * sockfs_dname() is called from d_path(). | |
317 | */ | |
318 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
319 | { | |
320 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
321 | dentry->d_inode->i_ino); | |
322 | } | |
323 | ||
3ba13d17 | 324 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 325 | .d_dname = sockfs_dname, |
1da177e4 LT |
326 | }; |
327 | ||
328 | /* | |
329 | * Obtains the first available file descriptor and sets it up for use. | |
330 | * | |
39d8c1b6 DM |
331 | * These functions create file structures and maps them to fd space |
332 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
333 | * and file struct implicitly stored in sock->file. |
334 | * Note that another thread may close file descriptor before we return | |
335 | * from this function. We use the fact that now we do not refer | |
336 | * to socket after mapping. If one day we will need it, this | |
337 | * function will increment ref. count on file by 1. | |
338 | * | |
339 | * In any case returned fd MAY BE not valid! | |
340 | * This race condition is unavoidable | |
341 | * with shared fd spaces, we cannot solve it inside kernel, | |
342 | * but we take care of internal coherence yet. | |
343 | */ | |
344 | ||
7cbe66b6 | 345 | static int sock_alloc_file(struct socket *sock, struct file **f, int flags) |
1da177e4 | 346 | { |
7cbe66b6 | 347 | struct qstr name = { .name = "" }; |
2c48b9c4 | 348 | struct path path; |
7cbe66b6 | 349 | struct file *file; |
1da177e4 | 350 | int fd; |
1da177e4 | 351 | |
a677a039 | 352 | fd = get_unused_fd_flags(flags); |
7cbe66b6 AV |
353 | if (unlikely(fd < 0)) |
354 | return fd; | |
1da177e4 | 355 | |
2c48b9c4 AV |
356 | path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); |
357 | if (unlikely(!path.dentry)) { | |
7cbe66b6 | 358 | put_unused_fd(fd); |
39d8c1b6 | 359 | return -ENOMEM; |
7cbe66b6 | 360 | } |
2c48b9c4 | 361 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 362 | |
2c48b9c4 | 363 | path.dentry->d_op = &sockfs_dentry_operations; |
2c48b9c4 | 364 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 365 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 366 | |
2c48b9c4 | 367 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 368 | &socket_file_ops); |
cc3808f8 AV |
369 | if (unlikely(!file)) { |
370 | /* drop dentry, keep inode */ | |
371 | atomic_inc(&path.dentry->d_inode->i_count); | |
2c48b9c4 | 372 | path_put(&path); |
cc3808f8 AV |
373 | put_unused_fd(fd); |
374 | return -ENFILE; | |
375 | } | |
376 | ||
377 | sock->file = file; | |
77d27200 | 378 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
379 | file->f_pos = 0; |
380 | file->private_data = sock; | |
1da177e4 | 381 | |
7cbe66b6 AV |
382 | *f = file; |
383 | return fd; | |
39d8c1b6 DM |
384 | } |
385 | ||
a677a039 | 386 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
387 | { |
388 | struct file *newfile; | |
7cbe66b6 | 389 | int fd = sock_alloc_file(sock, &newfile, flags); |
39d8c1b6 | 390 | |
7cbe66b6 | 391 | if (likely(fd >= 0)) |
39d8c1b6 | 392 | fd_install(fd, newfile); |
7cbe66b6 | 393 | |
1da177e4 LT |
394 | return fd; |
395 | } | |
396 | ||
6cb153ca BL |
397 | static struct socket *sock_from_file(struct file *file, int *err) |
398 | { | |
6cb153ca BL |
399 | if (file->f_op == &socket_file_ops) |
400 | return file->private_data; /* set in sock_map_fd */ | |
401 | ||
23bb80d2 ED |
402 | *err = -ENOTSOCK; |
403 | return NULL; | |
6cb153ca BL |
404 | } |
405 | ||
1da177e4 LT |
406 | /** |
407 | * sockfd_lookup - Go from a file number to its socket slot | |
408 | * @fd: file handle | |
409 | * @err: pointer to an error code return | |
410 | * | |
411 | * The file handle passed in is locked and the socket it is bound | |
412 | * too is returned. If an error occurs the err pointer is overwritten | |
413 | * with a negative errno code and NULL is returned. The function checks | |
414 | * for both invalid handles and passing a handle which is not a socket. | |
415 | * | |
416 | * On a success the socket object pointer is returned. | |
417 | */ | |
418 | ||
419 | struct socket *sockfd_lookup(int fd, int *err) | |
420 | { | |
421 | struct file *file; | |
1da177e4 LT |
422 | struct socket *sock; |
423 | ||
89bddce5 SH |
424 | file = fget(fd); |
425 | if (!file) { | |
1da177e4 LT |
426 | *err = -EBADF; |
427 | return NULL; | |
428 | } | |
89bddce5 | 429 | |
6cb153ca BL |
430 | sock = sock_from_file(file, err); |
431 | if (!sock) | |
1da177e4 | 432 | fput(file); |
6cb153ca BL |
433 | return sock; |
434 | } | |
1da177e4 | 435 | |
6cb153ca BL |
436 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
437 | { | |
438 | struct file *file; | |
439 | struct socket *sock; | |
440 | ||
3672558c | 441 | *err = -EBADF; |
6cb153ca BL |
442 | file = fget_light(fd, fput_needed); |
443 | if (file) { | |
444 | sock = sock_from_file(file, err); | |
445 | if (sock) | |
446 | return sock; | |
447 | fput_light(file, *fput_needed); | |
1da177e4 | 448 | } |
6cb153ca | 449 | return NULL; |
1da177e4 LT |
450 | } |
451 | ||
452 | /** | |
453 | * sock_alloc - allocate a socket | |
89bddce5 | 454 | * |
1da177e4 LT |
455 | * Allocate a new inode and socket object. The two are bound together |
456 | * and initialised. The socket is then returned. If we are out of inodes | |
457 | * NULL is returned. | |
458 | */ | |
459 | ||
460 | static struct socket *sock_alloc(void) | |
461 | { | |
89bddce5 SH |
462 | struct inode *inode; |
463 | struct socket *sock; | |
1da177e4 LT |
464 | |
465 | inode = new_inode(sock_mnt->mnt_sb); | |
466 | if (!inode) | |
467 | return NULL; | |
468 | ||
469 | sock = SOCKET_I(inode); | |
470 | ||
29a020d3 | 471 | kmemcheck_annotate_bitfield(sock, type); |
89bddce5 | 472 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
473 | inode->i_uid = current_fsuid(); |
474 | inode->i_gid = current_fsgid(); | |
1da177e4 | 475 | |
4e69489a | 476 | percpu_add(sockets_in_use, 1); |
1da177e4 LT |
477 | return sock; |
478 | } | |
479 | ||
480 | /* | |
481 | * In theory you can't get an open on this inode, but /proc provides | |
482 | * a back door. Remember to keep it shut otherwise you'll let the | |
483 | * creepy crawlies in. | |
484 | */ | |
89bddce5 | 485 | |
1da177e4 LT |
486 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
487 | { | |
488 | return -ENXIO; | |
489 | } | |
490 | ||
4b6f5d20 | 491 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
492 | .owner = THIS_MODULE, |
493 | .open = sock_no_open, | |
494 | }; | |
495 | ||
496 | /** | |
497 | * sock_release - close a socket | |
498 | * @sock: socket to close | |
499 | * | |
500 | * The socket is released from the protocol stack if it has a release | |
501 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 502 | * an inode not a file. |
1da177e4 | 503 | */ |
89bddce5 | 504 | |
1da177e4 LT |
505 | void sock_release(struct socket *sock) |
506 | { | |
507 | if (sock->ops) { | |
508 | struct module *owner = sock->ops->owner; | |
509 | ||
510 | sock->ops->release(sock); | |
511 | sock->ops = NULL; | |
512 | module_put(owner); | |
513 | } | |
514 | ||
515 | if (sock->fasync_list) | |
516 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); | |
517 | ||
4e69489a | 518 | percpu_sub(sockets_in_use, 1); |
1da177e4 LT |
519 | if (!sock->file) { |
520 | iput(SOCK_INODE(sock)); | |
521 | return; | |
522 | } | |
89bddce5 | 523 | sock->file = NULL; |
1da177e4 LT |
524 | } |
525 | ||
20d49473 PO |
526 | int sock_tx_timestamp(struct msghdr *msg, struct sock *sk, |
527 | union skb_shared_tx *shtx) | |
528 | { | |
529 | shtx->flags = 0; | |
530 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) | |
531 | shtx->hardware = 1; | |
532 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) | |
533 | shtx->software = 1; | |
534 | return 0; | |
535 | } | |
536 | EXPORT_SYMBOL(sock_tx_timestamp); | |
537 | ||
89bddce5 | 538 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
539 | struct msghdr *msg, size_t size) |
540 | { | |
541 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
542 | int err; | |
543 | ||
544 | si->sock = sock; | |
545 | si->scm = NULL; | |
546 | si->msg = msg; | |
547 | si->size = size; | |
548 | ||
549 | err = security_socket_sendmsg(sock, msg, size); | |
550 | if (err) | |
551 | return err; | |
552 | ||
553 | return sock->ops->sendmsg(iocb, sock, msg, size); | |
554 | } | |
555 | ||
556 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
557 | { | |
558 | struct kiocb iocb; | |
559 | struct sock_iocb siocb; | |
560 | int ret; | |
561 | ||
562 | init_sync_kiocb(&iocb, NULL); | |
563 | iocb.private = &siocb; | |
564 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
565 | if (-EIOCBQUEUED == ret) | |
566 | ret = wait_on_sync_kiocb(&iocb); | |
567 | return ret; | |
568 | } | |
569 | ||
570 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
571 | struct kvec *vec, size_t num, size_t size) | |
572 | { | |
573 | mm_segment_t oldfs = get_fs(); | |
574 | int result; | |
575 | ||
576 | set_fs(KERNEL_DS); | |
577 | /* | |
578 | * the following is safe, since for compiler definitions of kvec and | |
579 | * iovec are identical, yielding the same in-core layout and alignment | |
580 | */ | |
89bddce5 | 581 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
582 | msg->msg_iovlen = num; |
583 | result = sock_sendmsg(sock, msg, size); | |
584 | set_fs(oldfs); | |
585 | return result; | |
586 | } | |
587 | ||
20d49473 PO |
588 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
589 | { | |
590 | if (kt.tv64) { | |
591 | *ts = ktime_to_timespec(kt); | |
592 | return 1; | |
593 | } else { | |
594 | return 0; | |
595 | } | |
596 | } | |
597 | ||
92f37fd2 ED |
598 | /* |
599 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
600 | */ | |
601 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
602 | struct sk_buff *skb) | |
603 | { | |
20d49473 PO |
604 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
605 | struct timespec ts[3]; | |
606 | int empty = 1; | |
607 | struct skb_shared_hwtstamps *shhwtstamps = | |
608 | skb_hwtstamps(skb); | |
609 | ||
610 | /* Race occurred between timestamp enabling and packet | |
611 | receiving. Fill in the current time for now. */ | |
612 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
613 | __net_timestamp(skb); | |
614 | ||
615 | if (need_software_tstamp) { | |
616 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
617 | struct timeval tv; | |
618 | skb_get_timestamp(skb, &tv); | |
619 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
620 | sizeof(tv), &tv); | |
621 | } else { | |
622 | struct timespec ts; | |
623 | skb_get_timestampns(skb, &ts); | |
624 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, | |
625 | sizeof(ts), &ts); | |
626 | } | |
627 | } | |
628 | ||
629 | ||
630 | memset(ts, 0, sizeof(ts)); | |
631 | if (skb->tstamp.tv64 && | |
632 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
633 | skb_get_timestampns(skb, ts + 0); | |
634 | empty = 0; | |
635 | } | |
636 | if (shhwtstamps) { | |
637 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
638 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
639 | empty = 0; | |
640 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
641 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
642 | empty = 0; | |
92f37fd2 | 643 | } |
20d49473 PO |
644 | if (!empty) |
645 | put_cmsg(msg, SOL_SOCKET, | |
646 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 ED |
647 | } |
648 | ||
7c81fd8b ACM |
649 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
650 | ||
3b885787 NH |
651 | inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) |
652 | { | |
653 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
654 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
655 | sizeof(__u32), &skb->dropcount); | |
656 | } | |
657 | ||
658 | void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, | |
659 | struct sk_buff *skb) | |
660 | { | |
661 | sock_recv_timestamp(msg, sk, skb); | |
662 | sock_recv_drops(msg, sk, skb); | |
663 | } | |
664 | EXPORT_SYMBOL_GPL(sock_recv_ts_and_drops); | |
665 | ||
a2e27255 ACM |
666 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
667 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 668 | { |
1da177e4 LT |
669 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
670 | ||
671 | si->sock = sock; | |
672 | si->scm = NULL; | |
673 | si->msg = msg; | |
674 | si->size = size; | |
675 | si->flags = flags; | |
676 | ||
1da177e4 LT |
677 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
678 | } | |
679 | ||
a2e27255 ACM |
680 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
681 | struct msghdr *msg, size_t size, int flags) | |
682 | { | |
683 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
684 | ||
685 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
686 | } | |
687 | ||
89bddce5 | 688 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
689 | size_t size, int flags) |
690 | { | |
691 | struct kiocb iocb; | |
692 | struct sock_iocb siocb; | |
693 | int ret; | |
694 | ||
89bddce5 | 695 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
696 | iocb.private = &siocb; |
697 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
698 | if (-EIOCBQUEUED == ret) | |
699 | ret = wait_on_sync_kiocb(&iocb); | |
700 | return ret; | |
701 | } | |
702 | ||
a2e27255 ACM |
703 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
704 | size_t size, int flags) | |
705 | { | |
706 | struct kiocb iocb; | |
707 | struct sock_iocb siocb; | |
708 | int ret; | |
709 | ||
710 | init_sync_kiocb(&iocb, NULL); | |
711 | iocb.private = &siocb; | |
712 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
713 | if (-EIOCBQUEUED == ret) | |
714 | ret = wait_on_sync_kiocb(&iocb); | |
715 | return ret; | |
716 | } | |
717 | ||
89bddce5 SH |
718 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
719 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
720 | { |
721 | mm_segment_t oldfs = get_fs(); | |
722 | int result; | |
723 | ||
724 | set_fs(KERNEL_DS); | |
725 | /* | |
726 | * the following is safe, since for compiler definitions of kvec and | |
727 | * iovec are identical, yielding the same in-core layout and alignment | |
728 | */ | |
89bddce5 | 729 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
730 | result = sock_recvmsg(sock, msg, size, flags); |
731 | set_fs(oldfs); | |
732 | return result; | |
733 | } | |
734 | ||
735 | static void sock_aio_dtor(struct kiocb *iocb) | |
736 | { | |
737 | kfree(iocb->private); | |
738 | } | |
739 | ||
ce1d4d3e CH |
740 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
741 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 742 | { |
1da177e4 LT |
743 | struct socket *sock; |
744 | int flags; | |
745 | ||
ce1d4d3e CH |
746 | sock = file->private_data; |
747 | ||
748 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; | |
749 | if (more) | |
750 | flags |= MSG_MORE; | |
751 | ||
e6949583 | 752 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 753 | } |
1da177e4 | 754 | |
9c55e01c JA |
755 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
756 | struct pipe_inode_info *pipe, size_t len, | |
757 | unsigned int flags) | |
758 | { | |
759 | struct socket *sock = file->private_data; | |
760 | ||
997b37da RDC |
761 | if (unlikely(!sock->ops->splice_read)) |
762 | return -EINVAL; | |
763 | ||
9c55e01c JA |
764 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
765 | } | |
766 | ||
ce1d4d3e | 767 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 768 | struct sock_iocb *siocb) |
ce1d4d3e CH |
769 | { |
770 | if (!is_sync_kiocb(iocb)) { | |
771 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
772 | if (!siocb) | |
773 | return NULL; | |
1da177e4 LT |
774 | iocb->ki_dtor = sock_aio_dtor; |
775 | } | |
1da177e4 | 776 | |
ce1d4d3e | 777 | siocb->kiocb = iocb; |
ce1d4d3e CH |
778 | iocb->private = siocb; |
779 | return siocb; | |
1da177e4 LT |
780 | } |
781 | ||
ce1d4d3e | 782 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
783 | struct file *file, const struct iovec *iov, |
784 | unsigned long nr_segs) | |
ce1d4d3e CH |
785 | { |
786 | struct socket *sock = file->private_data; | |
787 | size_t size = 0; | |
788 | int i; | |
1da177e4 | 789 | |
89bddce5 SH |
790 | for (i = 0; i < nr_segs; i++) |
791 | size += iov[i].iov_len; | |
1da177e4 | 792 | |
ce1d4d3e CH |
793 | msg->msg_name = NULL; |
794 | msg->msg_namelen = 0; | |
795 | msg->msg_control = NULL; | |
796 | msg->msg_controllen = 0; | |
89bddce5 | 797 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
798 | msg->msg_iovlen = nr_segs; |
799 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
800 | ||
801 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
802 | } | |
803 | ||
027445c3 BP |
804 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
805 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
806 | { |
807 | struct sock_iocb siocb, *x; | |
808 | ||
1da177e4 LT |
809 | if (pos != 0) |
810 | return -ESPIPE; | |
027445c3 BP |
811 | |
812 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
813 | return 0; |
814 | ||
027445c3 BP |
815 | |
816 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
817 | if (!x) |
818 | return -ENOMEM; | |
027445c3 | 819 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
820 | } |
821 | ||
ce1d4d3e | 822 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
823 | struct file *file, const struct iovec *iov, |
824 | unsigned long nr_segs) | |
1da177e4 | 825 | { |
ce1d4d3e CH |
826 | struct socket *sock = file->private_data; |
827 | size_t size = 0; | |
828 | int i; | |
1da177e4 | 829 | |
89bddce5 SH |
830 | for (i = 0; i < nr_segs; i++) |
831 | size += iov[i].iov_len; | |
1da177e4 | 832 | |
ce1d4d3e CH |
833 | msg->msg_name = NULL; |
834 | msg->msg_namelen = 0; | |
835 | msg->msg_control = NULL; | |
836 | msg->msg_controllen = 0; | |
89bddce5 | 837 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
838 | msg->msg_iovlen = nr_segs; |
839 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
840 | if (sock->type == SOCK_SEQPACKET) | |
841 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 842 | |
ce1d4d3e | 843 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
844 | } |
845 | ||
027445c3 BP |
846 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
847 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
848 | { |
849 | struct sock_iocb siocb, *x; | |
1da177e4 | 850 | |
ce1d4d3e CH |
851 | if (pos != 0) |
852 | return -ESPIPE; | |
027445c3 | 853 | |
027445c3 | 854 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
855 | if (!x) |
856 | return -ENOMEM; | |
1da177e4 | 857 | |
027445c3 | 858 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
859 | } |
860 | ||
1da177e4 LT |
861 | /* |
862 | * Atomic setting of ioctl hooks to avoid race | |
863 | * with module unload. | |
864 | */ | |
865 | ||
4a3e2f71 | 866 | static DEFINE_MUTEX(br_ioctl_mutex); |
881d966b | 867 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL; |
1da177e4 | 868 | |
881d966b | 869 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 870 | { |
4a3e2f71 | 871 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 872 | br_ioctl_hook = hook; |
4a3e2f71 | 873 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 | 874 | } |
89bddce5 | 875 | |
1da177e4 LT |
876 | EXPORT_SYMBOL(brioctl_set); |
877 | ||
4a3e2f71 | 878 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 879 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 880 | |
881d966b | 881 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 882 | { |
4a3e2f71 | 883 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 884 | vlan_ioctl_hook = hook; |
4a3e2f71 | 885 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 886 | } |
89bddce5 | 887 | |
1da177e4 LT |
888 | EXPORT_SYMBOL(vlan_ioctl_set); |
889 | ||
4a3e2f71 | 890 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 891 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 892 | |
89bddce5 | 893 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 894 | { |
4a3e2f71 | 895 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 896 | dlci_ioctl_hook = hook; |
4a3e2f71 | 897 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 | 898 | } |
89bddce5 | 899 | |
1da177e4 LT |
900 | EXPORT_SYMBOL(dlci_ioctl_set); |
901 | ||
6b96018b AB |
902 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
903 | unsigned int cmd, unsigned long arg) | |
904 | { | |
905 | int err; | |
906 | void __user *argp = (void __user *)arg; | |
907 | ||
908 | err = sock->ops->ioctl(sock, cmd, arg); | |
909 | ||
910 | /* | |
911 | * If this ioctl is unknown try to hand it down | |
912 | * to the NIC driver. | |
913 | */ | |
914 | if (err == -ENOIOCTLCMD) | |
915 | err = dev_ioctl(net, cmd, argp); | |
916 | ||
917 | return err; | |
918 | } | |
919 | ||
1da177e4 LT |
920 | /* |
921 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
922 | * what to do with it - that's up to the protocol still. | |
923 | */ | |
924 | ||
925 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
926 | { | |
927 | struct socket *sock; | |
881d966b | 928 | struct sock *sk; |
1da177e4 LT |
929 | void __user *argp = (void __user *)arg; |
930 | int pid, err; | |
881d966b | 931 | struct net *net; |
1da177e4 | 932 | |
b69aee04 | 933 | sock = file->private_data; |
881d966b | 934 | sk = sock->sk; |
3b1e0a65 | 935 | net = sock_net(sk); |
1da177e4 | 936 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 937 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 938 | } else |
3d23e349 | 939 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 940 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 941 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 942 | } else |
3d23e349 | 943 | #endif |
89bddce5 | 944 | switch (cmd) { |
1da177e4 LT |
945 | case FIOSETOWN: |
946 | case SIOCSPGRP: | |
947 | err = -EFAULT; | |
948 | if (get_user(pid, (int __user *)argp)) | |
949 | break; | |
950 | err = f_setown(sock->file, pid, 1); | |
951 | break; | |
952 | case FIOGETOWN: | |
953 | case SIOCGPGRP: | |
609d7fa9 | 954 | err = put_user(f_getown(sock->file), |
89bddce5 | 955 | (int __user *)argp); |
1da177e4 LT |
956 | break; |
957 | case SIOCGIFBR: | |
958 | case SIOCSIFBR: | |
959 | case SIOCBRADDBR: | |
960 | case SIOCBRDELBR: | |
961 | err = -ENOPKG; | |
962 | if (!br_ioctl_hook) | |
963 | request_module("bridge"); | |
964 | ||
4a3e2f71 | 965 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 966 | if (br_ioctl_hook) |
881d966b | 967 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 968 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
969 | break; |
970 | case SIOCGIFVLAN: | |
971 | case SIOCSIFVLAN: | |
972 | err = -ENOPKG; | |
973 | if (!vlan_ioctl_hook) | |
974 | request_module("8021q"); | |
975 | ||
4a3e2f71 | 976 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 977 | if (vlan_ioctl_hook) |
881d966b | 978 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 979 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 980 | break; |
1da177e4 LT |
981 | case SIOCADDDLCI: |
982 | case SIOCDELDLCI: | |
983 | err = -ENOPKG; | |
984 | if (!dlci_ioctl_hook) | |
985 | request_module("dlci"); | |
986 | ||
7512cbf6 PE |
987 | mutex_lock(&dlci_ioctl_mutex); |
988 | if (dlci_ioctl_hook) | |
1da177e4 | 989 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 990 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
991 | break; |
992 | default: | |
6b96018b | 993 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 994 | break; |
89bddce5 | 995 | } |
1da177e4 LT |
996 | return err; |
997 | } | |
998 | ||
999 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1000 | { | |
1001 | int err; | |
1002 | struct socket *sock = NULL; | |
89bddce5 | 1003 | |
1da177e4 LT |
1004 | err = security_socket_create(family, type, protocol, 1); |
1005 | if (err) | |
1006 | goto out; | |
1007 | ||
1008 | sock = sock_alloc(); | |
1009 | if (!sock) { | |
1010 | err = -ENOMEM; | |
1011 | goto out; | |
1012 | } | |
1013 | ||
1da177e4 | 1014 | sock->type = type; |
7420ed23 VY |
1015 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1016 | if (err) | |
1017 | goto out_release; | |
1018 | ||
1da177e4 LT |
1019 | out: |
1020 | *res = sock; | |
1021 | return err; | |
7420ed23 VY |
1022 | out_release: |
1023 | sock_release(sock); | |
1024 | sock = NULL; | |
1025 | goto out; | |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | /* No kernel lock held - perfect */ | |
89bddce5 | 1029 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1030 | { |
1031 | struct socket *sock; | |
1032 | ||
1033 | /* | |
89bddce5 | 1034 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1035 | */ |
b69aee04 | 1036 | sock = file->private_data; |
1da177e4 LT |
1037 | return sock->ops->poll(file, sock, wait); |
1038 | } | |
1039 | ||
89bddce5 | 1040 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1041 | { |
b69aee04 | 1042 | struct socket *sock = file->private_data; |
1da177e4 LT |
1043 | |
1044 | return sock->ops->mmap(file, sock, vma); | |
1045 | } | |
1046 | ||
20380731 | 1047 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1048 | { |
1049 | /* | |
89bddce5 SH |
1050 | * It was possible the inode is NULL we were |
1051 | * closing an unfinished socket. | |
1da177e4 LT |
1052 | */ |
1053 | ||
89bddce5 | 1054 | if (!inode) { |
1da177e4 LT |
1055 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1056 | return 0; | |
1057 | } | |
1da177e4 LT |
1058 | sock_release(SOCKET_I(inode)); |
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | /* | |
1063 | * Update the socket async list | |
1064 | * | |
1065 | * Fasync_list locking strategy. | |
1066 | * | |
1067 | * 1. fasync_list is modified only under process context socket lock | |
1068 | * i.e. under semaphore. | |
1069 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
1070 | * or under socket lock. | |
1071 | * 3. fasync_list can be used from softirq context, so that | |
1072 | * modification under socket lock have to be enhanced with | |
1073 | * write_lock_bh(&sk->sk_callback_lock). | |
1074 | * --ANK (990710) | |
1075 | */ | |
1076 | ||
1077 | static int sock_fasync(int fd, struct file *filp, int on) | |
1078 | { | |
89bddce5 | 1079 | struct fasync_struct *fa, *fna = NULL, **prev; |
1da177e4 LT |
1080 | struct socket *sock; |
1081 | struct sock *sk; | |
1082 | ||
89bddce5 | 1083 | if (on) { |
8b3a7005 | 1084 | fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL); |
89bddce5 | 1085 | if (fna == NULL) |
1da177e4 LT |
1086 | return -ENOMEM; |
1087 | } | |
1088 | ||
b69aee04 | 1089 | sock = filp->private_data; |
1da177e4 | 1090 | |
89bddce5 SH |
1091 | sk = sock->sk; |
1092 | if (sk == NULL) { | |
1da177e4 LT |
1093 | kfree(fna); |
1094 | return -EINVAL; | |
1095 | } | |
1096 | ||
1097 | lock_sock(sk); | |
1098 | ||
76398425 JC |
1099 | spin_lock(&filp->f_lock); |
1100 | if (on) | |
1101 | filp->f_flags |= FASYNC; | |
1102 | else | |
1103 | filp->f_flags &= ~FASYNC; | |
1104 | spin_unlock(&filp->f_lock); | |
1105 | ||
89bddce5 | 1106 | prev = &(sock->fasync_list); |
1da177e4 | 1107 | |
89bddce5 SH |
1108 | for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev) |
1109 | if (fa->fa_file == filp) | |
1da177e4 LT |
1110 | break; |
1111 | ||
89bddce5 SH |
1112 | if (on) { |
1113 | if (fa != NULL) { | |
1da177e4 | 1114 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1115 | fa->fa_fd = fd; |
1da177e4 LT |
1116 | write_unlock_bh(&sk->sk_callback_lock); |
1117 | ||
1118 | kfree(fna); | |
1119 | goto out; | |
1120 | } | |
89bddce5 SH |
1121 | fna->fa_file = filp; |
1122 | fna->fa_fd = fd; | |
1123 | fna->magic = FASYNC_MAGIC; | |
1124 | fna->fa_next = sock->fasync_list; | |
1da177e4 | 1125 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1126 | sock->fasync_list = fna; |
bcdce719 | 1127 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1128 | write_unlock_bh(&sk->sk_callback_lock); |
89bddce5 SH |
1129 | } else { |
1130 | if (fa != NULL) { | |
1da177e4 | 1131 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1132 | *prev = fa->fa_next; |
bcdce719 ED |
1133 | if (!sock->fasync_list) |
1134 | sock_reset_flag(sk, SOCK_FASYNC); | |
1da177e4 LT |
1135 | write_unlock_bh(&sk->sk_callback_lock); |
1136 | kfree(fa); | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | out: | |
1141 | release_sock(sock->sk); | |
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | /* This function may be called only under socket lock or callback_lock */ | |
1146 | ||
1147 | int sock_wake_async(struct socket *sock, int how, int band) | |
1148 | { | |
1149 | if (!sock || !sock->fasync_list) | |
1150 | return -1; | |
89bddce5 | 1151 | switch (how) { |
8d8ad9d7 | 1152 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1153 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1154 | break; | |
1155 | goto call_kill; | |
8d8ad9d7 | 1156 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1157 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1158 | break; | |
1159 | /* fall through */ | |
8d8ad9d7 | 1160 | case SOCK_WAKE_IO: |
89bddce5 | 1161 | call_kill: |
1da177e4 LT |
1162 | __kill_fasync(sock->fasync_list, SIGIO, band); |
1163 | break; | |
8d8ad9d7 | 1164 | case SOCK_WAKE_URG: |
1da177e4 LT |
1165 | __kill_fasync(sock->fasync_list, SIGURG, band); |
1166 | } | |
1167 | return 0; | |
1168 | } | |
1169 | ||
1b8d7ae4 | 1170 | static int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1171 | struct socket **res, int kern) |
1da177e4 LT |
1172 | { |
1173 | int err; | |
1174 | struct socket *sock; | |
55737fda | 1175 | const struct net_proto_family *pf; |
1da177e4 LT |
1176 | |
1177 | /* | |
89bddce5 | 1178 | * Check protocol is in range |
1da177e4 LT |
1179 | */ |
1180 | if (family < 0 || family >= NPROTO) | |
1181 | return -EAFNOSUPPORT; | |
1182 | if (type < 0 || type >= SOCK_MAX) | |
1183 | return -EINVAL; | |
1184 | ||
1185 | /* Compatibility. | |
1186 | ||
1187 | This uglymoron is moved from INET layer to here to avoid | |
1188 | deadlock in module load. | |
1189 | */ | |
1190 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1191 | static int warned; |
1da177e4 LT |
1192 | if (!warned) { |
1193 | warned = 1; | |
89bddce5 SH |
1194 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1195 | current->comm); | |
1da177e4 LT |
1196 | } |
1197 | family = PF_PACKET; | |
1198 | } | |
1199 | ||
1200 | err = security_socket_create(family, type, protocol, kern); | |
1201 | if (err) | |
1202 | return err; | |
89bddce5 | 1203 | |
55737fda SH |
1204 | /* |
1205 | * Allocate the socket and allow the family to set things up. if | |
1206 | * the protocol is 0, the family is instructed to select an appropriate | |
1207 | * default. | |
1208 | */ | |
1209 | sock = sock_alloc(); | |
1210 | if (!sock) { | |
1211 | if (net_ratelimit()) | |
1212 | printk(KERN_WARNING "socket: no more sockets\n"); | |
1213 | return -ENFILE; /* Not exactly a match, but its the | |
1214 | closest posix thing */ | |
1215 | } | |
1216 | ||
1217 | sock->type = type; | |
1218 | ||
95a5afca | 1219 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1220 | /* Attempt to load a protocol module if the find failed. |
1221 | * | |
1222 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1223 | * requested real, full-featured networking support upon configuration. |
1224 | * Otherwise module support will break! | |
1225 | */ | |
55737fda | 1226 | if (net_families[family] == NULL) |
89bddce5 | 1227 | request_module("net-pf-%d", family); |
1da177e4 LT |
1228 | #endif |
1229 | ||
55737fda SH |
1230 | rcu_read_lock(); |
1231 | pf = rcu_dereference(net_families[family]); | |
1232 | err = -EAFNOSUPPORT; | |
1233 | if (!pf) | |
1234 | goto out_release; | |
1da177e4 LT |
1235 | |
1236 | /* | |
1237 | * We will call the ->create function, that possibly is in a loadable | |
1238 | * module, so we have to bump that loadable module refcnt first. | |
1239 | */ | |
55737fda | 1240 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1241 | goto out_release; |
1242 | ||
55737fda SH |
1243 | /* Now protected by module ref count */ |
1244 | rcu_read_unlock(); | |
1245 | ||
3f378b68 | 1246 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1247 | if (err < 0) |
1da177e4 | 1248 | goto out_module_put; |
a79af59e | 1249 | |
1da177e4 LT |
1250 | /* |
1251 | * Now to bump the refcnt of the [loadable] module that owns this | |
1252 | * socket at sock_release time we decrement its refcnt. | |
1253 | */ | |
55737fda SH |
1254 | if (!try_module_get(sock->ops->owner)) |
1255 | goto out_module_busy; | |
1256 | ||
1da177e4 LT |
1257 | /* |
1258 | * Now that we're done with the ->create function, the [loadable] | |
1259 | * module can have its refcnt decremented | |
1260 | */ | |
55737fda | 1261 | module_put(pf->owner); |
7420ed23 VY |
1262 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1263 | if (err) | |
3b185525 | 1264 | goto out_sock_release; |
55737fda | 1265 | *res = sock; |
1da177e4 | 1266 | |
55737fda SH |
1267 | return 0; |
1268 | ||
1269 | out_module_busy: | |
1270 | err = -EAFNOSUPPORT; | |
1da177e4 | 1271 | out_module_put: |
55737fda SH |
1272 | sock->ops = NULL; |
1273 | module_put(pf->owner); | |
1274 | out_sock_release: | |
1da177e4 | 1275 | sock_release(sock); |
55737fda SH |
1276 | return err; |
1277 | ||
1278 | out_release: | |
1279 | rcu_read_unlock(); | |
1280 | goto out_sock_release; | |
1da177e4 LT |
1281 | } |
1282 | ||
1283 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1284 | { | |
1b8d7ae4 | 1285 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 LT |
1286 | } |
1287 | ||
1288 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1289 | { | |
1b8d7ae4 | 1290 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 LT |
1291 | } |
1292 | ||
3e0fa65f | 1293 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1294 | { |
1295 | int retval; | |
1296 | struct socket *sock; | |
a677a039 UD |
1297 | int flags; |
1298 | ||
e38b36f3 UD |
1299 | /* Check the SOCK_* constants for consistency. */ |
1300 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1301 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1302 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1303 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1304 | ||
a677a039 | 1305 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1306 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1307 | return -EINVAL; |
1308 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1309 | |
aaca0bdc UD |
1310 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1311 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1312 | ||
1da177e4 LT |
1313 | retval = sock_create(family, type, protocol, &sock); |
1314 | if (retval < 0) | |
1315 | goto out; | |
1316 | ||
77d27200 | 1317 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1318 | if (retval < 0) |
1319 | goto out_release; | |
1320 | ||
1321 | out: | |
1322 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1323 | return retval; | |
1324 | ||
1325 | out_release: | |
1326 | sock_release(sock); | |
1327 | return retval; | |
1328 | } | |
1329 | ||
1330 | /* | |
1331 | * Create a pair of connected sockets. | |
1332 | */ | |
1333 | ||
3e0fa65f HC |
1334 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1335 | int __user *, usockvec) | |
1da177e4 LT |
1336 | { |
1337 | struct socket *sock1, *sock2; | |
1338 | int fd1, fd2, err; | |
db349509 | 1339 | struct file *newfile1, *newfile2; |
a677a039 UD |
1340 | int flags; |
1341 | ||
1342 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1343 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1344 | return -EINVAL; |
1345 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1346 | |
aaca0bdc UD |
1347 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1348 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1349 | ||
1da177e4 LT |
1350 | /* |
1351 | * Obtain the first socket and check if the underlying protocol | |
1352 | * supports the socketpair call. | |
1353 | */ | |
1354 | ||
1355 | err = sock_create(family, type, protocol, &sock1); | |
1356 | if (err < 0) | |
1357 | goto out; | |
1358 | ||
1359 | err = sock_create(family, type, protocol, &sock2); | |
1360 | if (err < 0) | |
1361 | goto out_release_1; | |
1362 | ||
1363 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1364 | if (err < 0) |
1da177e4 LT |
1365 | goto out_release_both; |
1366 | ||
7cbe66b6 | 1367 | fd1 = sock_alloc_file(sock1, &newfile1, flags); |
bf3c23d1 DM |
1368 | if (unlikely(fd1 < 0)) { |
1369 | err = fd1; | |
db349509 | 1370 | goto out_release_both; |
bf3c23d1 | 1371 | } |
1da177e4 | 1372 | |
7cbe66b6 | 1373 | fd2 = sock_alloc_file(sock2, &newfile2, flags); |
198de4d7 AV |
1374 | if (unlikely(fd2 < 0)) { |
1375 | err = fd2; | |
1376 | fput(newfile1); | |
1377 | put_unused_fd(fd1); | |
1378 | sock_release(sock2); | |
1379 | goto out; | |
db349509 AV |
1380 | } |
1381 | ||
157cf649 | 1382 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1383 | fd_install(fd1, newfile1); |
1384 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1385 | /* fd1 and fd2 may be already another descriptors. |
1386 | * Not kernel problem. | |
1387 | */ | |
1388 | ||
89bddce5 | 1389 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1390 | if (!err) |
1391 | err = put_user(fd2, &usockvec[1]); | |
1392 | if (!err) | |
1393 | return 0; | |
1394 | ||
1395 | sys_close(fd2); | |
1396 | sys_close(fd1); | |
1397 | return err; | |
1398 | ||
1da177e4 | 1399 | out_release_both: |
89bddce5 | 1400 | sock_release(sock2); |
1da177e4 | 1401 | out_release_1: |
89bddce5 | 1402 | sock_release(sock1); |
1da177e4 LT |
1403 | out: |
1404 | return err; | |
1405 | } | |
1406 | ||
1da177e4 LT |
1407 | /* |
1408 | * Bind a name to a socket. Nothing much to do here since it's | |
1409 | * the protocol's responsibility to handle the local address. | |
1410 | * | |
1411 | * We move the socket address to kernel space before we call | |
1412 | * the protocol layer (having also checked the address is ok). | |
1413 | */ | |
1414 | ||
20f37034 | 1415 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1416 | { |
1417 | struct socket *sock; | |
230b1839 | 1418 | struct sockaddr_storage address; |
6cb153ca | 1419 | int err, fput_needed; |
1da177e4 | 1420 | |
89bddce5 | 1421 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1422 | if (sock) { |
230b1839 | 1423 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
89bddce5 SH |
1424 | if (err >= 0) { |
1425 | err = security_socket_bind(sock, | |
230b1839 | 1426 | (struct sockaddr *)&address, |
89bddce5 | 1427 | addrlen); |
6cb153ca BL |
1428 | if (!err) |
1429 | err = sock->ops->bind(sock, | |
89bddce5 | 1430 | (struct sockaddr *) |
230b1839 | 1431 | &address, addrlen); |
1da177e4 | 1432 | } |
6cb153ca | 1433 | fput_light(sock->file, fput_needed); |
89bddce5 | 1434 | } |
1da177e4 LT |
1435 | return err; |
1436 | } | |
1437 | ||
1da177e4 LT |
1438 | /* |
1439 | * Perform a listen. Basically, we allow the protocol to do anything | |
1440 | * necessary for a listen, and if that works, we mark the socket as | |
1441 | * ready for listening. | |
1442 | */ | |
1443 | ||
3e0fa65f | 1444 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1445 | { |
1446 | struct socket *sock; | |
6cb153ca | 1447 | int err, fput_needed; |
b8e1f9b5 | 1448 | int somaxconn; |
89bddce5 SH |
1449 | |
1450 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1451 | if (sock) { | |
8efa6e93 | 1452 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
b8e1f9b5 PE |
1453 | if ((unsigned)backlog > somaxconn) |
1454 | backlog = somaxconn; | |
1da177e4 LT |
1455 | |
1456 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1457 | if (!err) |
1458 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1459 | |
6cb153ca | 1460 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1461 | } |
1462 | return err; | |
1463 | } | |
1464 | ||
1da177e4 LT |
1465 | /* |
1466 | * For accept, we attempt to create a new socket, set up the link | |
1467 | * with the client, wake up the client, then return the new | |
1468 | * connected fd. We collect the address of the connector in kernel | |
1469 | * space and move it to user at the very end. This is unclean because | |
1470 | * we open the socket then return an error. | |
1471 | * | |
1472 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1473 | * status to recvmsg. We need to add that support in a way thats | |
1474 | * clean when we restucture accept also. | |
1475 | */ | |
1476 | ||
20f37034 HC |
1477 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1478 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1479 | { |
1480 | struct socket *sock, *newsock; | |
39d8c1b6 | 1481 | struct file *newfile; |
6cb153ca | 1482 | int err, len, newfd, fput_needed; |
230b1839 | 1483 | struct sockaddr_storage address; |
1da177e4 | 1484 | |
77d27200 | 1485 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1486 | return -EINVAL; |
1487 | ||
1488 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1489 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1490 | ||
6cb153ca | 1491 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1492 | if (!sock) |
1493 | goto out; | |
1494 | ||
1495 | err = -ENFILE; | |
89bddce5 | 1496 | if (!(newsock = sock_alloc())) |
1da177e4 LT |
1497 | goto out_put; |
1498 | ||
1499 | newsock->type = sock->type; | |
1500 | newsock->ops = sock->ops; | |
1501 | ||
1da177e4 LT |
1502 | /* |
1503 | * We don't need try_module_get here, as the listening socket (sock) | |
1504 | * has the protocol module (sock->ops->owner) held. | |
1505 | */ | |
1506 | __module_get(newsock->ops->owner); | |
1507 | ||
7cbe66b6 | 1508 | newfd = sock_alloc_file(newsock, &newfile, flags); |
39d8c1b6 DM |
1509 | if (unlikely(newfd < 0)) { |
1510 | err = newfd; | |
9a1875e6 DM |
1511 | sock_release(newsock); |
1512 | goto out_put; | |
39d8c1b6 DM |
1513 | } |
1514 | ||
a79af59e FF |
1515 | err = security_socket_accept(sock, newsock); |
1516 | if (err) | |
39d8c1b6 | 1517 | goto out_fd; |
a79af59e | 1518 | |
1da177e4 LT |
1519 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1520 | if (err < 0) | |
39d8c1b6 | 1521 | goto out_fd; |
1da177e4 LT |
1522 | |
1523 | if (upeer_sockaddr) { | |
230b1839 | 1524 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1525 | &len, 2) < 0) { |
1da177e4 | 1526 | err = -ECONNABORTED; |
39d8c1b6 | 1527 | goto out_fd; |
1da177e4 | 1528 | } |
230b1839 YH |
1529 | err = move_addr_to_user((struct sockaddr *)&address, |
1530 | len, upeer_sockaddr, upeer_addrlen); | |
1da177e4 | 1531 | if (err < 0) |
39d8c1b6 | 1532 | goto out_fd; |
1da177e4 LT |
1533 | } |
1534 | ||
1535 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1536 | ||
39d8c1b6 DM |
1537 | fd_install(newfd, newfile); |
1538 | err = newfd; | |
1da177e4 | 1539 | |
1da177e4 | 1540 | out_put: |
6cb153ca | 1541 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1542 | out: |
1543 | return err; | |
39d8c1b6 | 1544 | out_fd: |
9606a216 | 1545 | fput(newfile); |
39d8c1b6 | 1546 | put_unused_fd(newfd); |
1da177e4 LT |
1547 | goto out_put; |
1548 | } | |
1549 | ||
20f37034 HC |
1550 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1551 | int __user *, upeer_addrlen) | |
aaca0bdc | 1552 | { |
de11defe | 1553 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1554 | } |
1555 | ||
1da177e4 LT |
1556 | /* |
1557 | * Attempt to connect to a socket with the server address. The address | |
1558 | * is in user space so we verify it is OK and move it to kernel space. | |
1559 | * | |
1560 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1561 | * break bindings | |
1562 | * | |
1563 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1564 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1565 | * include the -EINPROGRESS status for such sockets. | |
1566 | */ | |
1567 | ||
20f37034 HC |
1568 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1569 | int, addrlen) | |
1da177e4 LT |
1570 | { |
1571 | struct socket *sock; | |
230b1839 | 1572 | struct sockaddr_storage address; |
6cb153ca | 1573 | int err, fput_needed; |
1da177e4 | 1574 | |
6cb153ca | 1575 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1576 | if (!sock) |
1577 | goto out; | |
230b1839 | 1578 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
1da177e4 LT |
1579 | if (err < 0) |
1580 | goto out_put; | |
1581 | ||
89bddce5 | 1582 | err = |
230b1839 | 1583 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1584 | if (err) |
1585 | goto out_put; | |
1586 | ||
230b1839 | 1587 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1588 | sock->file->f_flags); |
1589 | out_put: | |
6cb153ca | 1590 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1591 | out: |
1592 | return err; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * Get the local address ('name') of a socket object. Move the obtained | |
1597 | * name to user space. | |
1598 | */ | |
1599 | ||
20f37034 HC |
1600 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1601 | int __user *, usockaddr_len) | |
1da177e4 LT |
1602 | { |
1603 | struct socket *sock; | |
230b1839 | 1604 | struct sockaddr_storage address; |
6cb153ca | 1605 | int len, err, fput_needed; |
89bddce5 | 1606 | |
6cb153ca | 1607 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1608 | if (!sock) |
1609 | goto out; | |
1610 | ||
1611 | err = security_socket_getsockname(sock); | |
1612 | if (err) | |
1613 | goto out_put; | |
1614 | ||
230b1839 | 1615 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1616 | if (err) |
1617 | goto out_put; | |
230b1839 | 1618 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1619 | |
1620 | out_put: | |
6cb153ca | 1621 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1622 | out: |
1623 | return err; | |
1624 | } | |
1625 | ||
1626 | /* | |
1627 | * Get the remote address ('name') of a socket object. Move the obtained | |
1628 | * name to user space. | |
1629 | */ | |
1630 | ||
20f37034 HC |
1631 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1632 | int __user *, usockaddr_len) | |
1da177e4 LT |
1633 | { |
1634 | struct socket *sock; | |
230b1839 | 1635 | struct sockaddr_storage address; |
6cb153ca | 1636 | int len, err, fput_needed; |
1da177e4 | 1637 | |
89bddce5 SH |
1638 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1639 | if (sock != NULL) { | |
1da177e4 LT |
1640 | err = security_socket_getpeername(sock); |
1641 | if (err) { | |
6cb153ca | 1642 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1643 | return err; |
1644 | } | |
1645 | ||
89bddce5 | 1646 | err = |
230b1839 | 1647 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1648 | 1); |
1da177e4 | 1649 | if (!err) |
230b1839 | 1650 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
89bddce5 | 1651 | usockaddr_len); |
6cb153ca | 1652 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1653 | } |
1654 | return err; | |
1655 | } | |
1656 | ||
1657 | /* | |
1658 | * Send a datagram to a given address. We move the address into kernel | |
1659 | * space and check the user space data area is readable before invoking | |
1660 | * the protocol. | |
1661 | */ | |
1662 | ||
3e0fa65f HC |
1663 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
1664 | unsigned, flags, struct sockaddr __user *, addr, | |
1665 | int, addr_len) | |
1da177e4 LT |
1666 | { |
1667 | struct socket *sock; | |
230b1839 | 1668 | struct sockaddr_storage address; |
1da177e4 LT |
1669 | int err; |
1670 | struct msghdr msg; | |
1671 | struct iovec iov; | |
6cb153ca | 1672 | int fput_needed; |
6cb153ca | 1673 | |
de0fa95c PE |
1674 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1675 | if (!sock) | |
4387ff75 | 1676 | goto out; |
6cb153ca | 1677 | |
89bddce5 SH |
1678 | iov.iov_base = buff; |
1679 | iov.iov_len = len; | |
1680 | msg.msg_name = NULL; | |
1681 | msg.msg_iov = &iov; | |
1682 | msg.msg_iovlen = 1; | |
1683 | msg.msg_control = NULL; | |
1684 | msg.msg_controllen = 0; | |
1685 | msg.msg_namelen = 0; | |
6cb153ca | 1686 | if (addr) { |
230b1839 | 1687 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
1da177e4 LT |
1688 | if (err < 0) |
1689 | goto out_put; | |
230b1839 | 1690 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1691 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1692 | } |
1693 | if (sock->file->f_flags & O_NONBLOCK) | |
1694 | flags |= MSG_DONTWAIT; | |
1695 | msg.msg_flags = flags; | |
1696 | err = sock_sendmsg(sock, &msg, len); | |
1697 | ||
89bddce5 | 1698 | out_put: |
de0fa95c | 1699 | fput_light(sock->file, fput_needed); |
4387ff75 | 1700 | out: |
1da177e4 LT |
1701 | return err; |
1702 | } | |
1703 | ||
1704 | /* | |
89bddce5 | 1705 | * Send a datagram down a socket. |
1da177e4 LT |
1706 | */ |
1707 | ||
3e0fa65f HC |
1708 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
1709 | unsigned, flags) | |
1da177e4 LT |
1710 | { |
1711 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1712 | } | |
1713 | ||
1714 | /* | |
89bddce5 | 1715 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1716 | * sender. We verify the buffers are writable and if needed move the |
1717 | * sender address from kernel to user space. | |
1718 | */ | |
1719 | ||
3e0fa65f HC |
1720 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
1721 | unsigned, flags, struct sockaddr __user *, addr, | |
1722 | int __user *, addr_len) | |
1da177e4 LT |
1723 | { |
1724 | struct socket *sock; | |
1725 | struct iovec iov; | |
1726 | struct msghdr msg; | |
230b1839 | 1727 | struct sockaddr_storage address; |
89bddce5 | 1728 | int err, err2; |
6cb153ca BL |
1729 | int fput_needed; |
1730 | ||
de0fa95c | 1731 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1732 | if (!sock) |
de0fa95c | 1733 | goto out; |
1da177e4 | 1734 | |
89bddce5 SH |
1735 | msg.msg_control = NULL; |
1736 | msg.msg_controllen = 0; | |
1737 | msg.msg_iovlen = 1; | |
1738 | msg.msg_iov = &iov; | |
1739 | iov.iov_len = size; | |
1740 | iov.iov_base = ubuf; | |
230b1839 YH |
1741 | msg.msg_name = (struct sockaddr *)&address; |
1742 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1743 | if (sock->file->f_flags & O_NONBLOCK) |
1744 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1745 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1746 | |
89bddce5 | 1747 | if (err >= 0 && addr != NULL) { |
230b1839 YH |
1748 | err2 = move_addr_to_user((struct sockaddr *)&address, |
1749 | msg.msg_namelen, addr, addr_len); | |
89bddce5 SH |
1750 | if (err2 < 0) |
1751 | err = err2; | |
1da177e4 | 1752 | } |
de0fa95c PE |
1753 | |
1754 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1755 | out: |
1da177e4 LT |
1756 | return err; |
1757 | } | |
1758 | ||
1759 | /* | |
89bddce5 | 1760 | * Receive a datagram from a socket. |
1da177e4 LT |
1761 | */ |
1762 | ||
89bddce5 SH |
1763 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
1764 | unsigned flags) | |
1da177e4 LT |
1765 | { |
1766 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Set a socket option. Because we don't know the option lengths we have | |
1771 | * to pass the user mode parameter for the protocols to sort out. | |
1772 | */ | |
1773 | ||
20f37034 HC |
1774 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1775 | char __user *, optval, int, optlen) | |
1da177e4 | 1776 | { |
6cb153ca | 1777 | int err, fput_needed; |
1da177e4 LT |
1778 | struct socket *sock; |
1779 | ||
1780 | if (optlen < 0) | |
1781 | return -EINVAL; | |
89bddce5 SH |
1782 | |
1783 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1784 | if (sock != NULL) { | |
1785 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1786 | if (err) |
1787 | goto out_put; | |
1da177e4 LT |
1788 | |
1789 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1790 | err = |
1791 | sock_setsockopt(sock, level, optname, optval, | |
1792 | optlen); | |
1da177e4 | 1793 | else |
89bddce5 SH |
1794 | err = |
1795 | sock->ops->setsockopt(sock, level, optname, optval, | |
1796 | optlen); | |
6cb153ca BL |
1797 | out_put: |
1798 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1799 | } |
1800 | return err; | |
1801 | } | |
1802 | ||
1803 | /* | |
1804 | * Get a socket option. Because we don't know the option lengths we have | |
1805 | * to pass a user mode parameter for the protocols to sort out. | |
1806 | */ | |
1807 | ||
20f37034 HC |
1808 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1809 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1810 | { |
6cb153ca | 1811 | int err, fput_needed; |
1da177e4 LT |
1812 | struct socket *sock; |
1813 | ||
89bddce5 SH |
1814 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1815 | if (sock != NULL) { | |
6cb153ca BL |
1816 | err = security_socket_getsockopt(sock, level, optname); |
1817 | if (err) | |
1818 | goto out_put; | |
1da177e4 LT |
1819 | |
1820 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1821 | err = |
1822 | sock_getsockopt(sock, level, optname, optval, | |
1823 | optlen); | |
1da177e4 | 1824 | else |
89bddce5 SH |
1825 | err = |
1826 | sock->ops->getsockopt(sock, level, optname, optval, | |
1827 | optlen); | |
6cb153ca BL |
1828 | out_put: |
1829 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1830 | } |
1831 | return err; | |
1832 | } | |
1833 | ||
1da177e4 LT |
1834 | /* |
1835 | * Shutdown a socket. | |
1836 | */ | |
1837 | ||
754fe8d2 | 1838 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1839 | { |
6cb153ca | 1840 | int err, fput_needed; |
1da177e4 LT |
1841 | struct socket *sock; |
1842 | ||
89bddce5 SH |
1843 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1844 | if (sock != NULL) { | |
1da177e4 | 1845 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1846 | if (!err) |
1847 | err = sock->ops->shutdown(sock, how); | |
1848 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1849 | } |
1850 | return err; | |
1851 | } | |
1852 | ||
89bddce5 | 1853 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1854 | * fields which are the same type (int / unsigned) on our platforms. |
1855 | */ | |
1856 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1857 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1858 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1859 | ||
1da177e4 LT |
1860 | /* |
1861 | * BSD sendmsg interface | |
1862 | */ | |
1863 | ||
3e0fa65f | 1864 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
1da177e4 | 1865 | { |
89bddce5 SH |
1866 | struct compat_msghdr __user *msg_compat = |
1867 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1868 | struct socket *sock; |
230b1839 | 1869 | struct sockaddr_storage address; |
1da177e4 | 1870 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1871 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1872 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1873 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 LT |
1874 | unsigned char *ctl_buf = ctl; |
1875 | struct msghdr msg_sys; | |
1876 | int err, ctl_len, iov_size, total_len; | |
6cb153ca | 1877 | int fput_needed; |
89bddce5 | 1878 | |
1da177e4 LT |
1879 | err = -EFAULT; |
1880 | if (MSG_CMSG_COMPAT & flags) { | |
1881 | if (get_compat_msghdr(&msg_sys, msg_compat)) | |
1882 | return -EFAULT; | |
89bddce5 SH |
1883 | } |
1884 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) | |
1da177e4 LT |
1885 | return -EFAULT; |
1886 | ||
6cb153ca | 1887 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
89bddce5 | 1888 | if (!sock) |
1da177e4 LT |
1889 | goto out; |
1890 | ||
1891 | /* do not move before msg_sys is valid */ | |
1892 | err = -EMSGSIZE; | |
1893 | if (msg_sys.msg_iovlen > UIO_MAXIOV) | |
1894 | goto out_put; | |
1895 | ||
89bddce5 | 1896 | /* Check whether to allocate the iovec area */ |
1da177e4 LT |
1897 | err = -ENOMEM; |
1898 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); | |
1899 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { | |
1900 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); | |
1901 | if (!iov) | |
1902 | goto out_put; | |
1903 | } | |
1904 | ||
1905 | /* This will also move the address data into kernel space */ | |
1906 | if (MSG_CMSG_COMPAT & flags) { | |
230b1839 YH |
1907 | err = verify_compat_iovec(&msg_sys, iov, |
1908 | (struct sockaddr *)&address, | |
1909 | VERIFY_READ); | |
1da177e4 | 1910 | } else |
230b1839 YH |
1911 | err = verify_iovec(&msg_sys, iov, |
1912 | (struct sockaddr *)&address, | |
1913 | VERIFY_READ); | |
89bddce5 | 1914 | if (err < 0) |
1da177e4 LT |
1915 | goto out_freeiov; |
1916 | total_len = err; | |
1917 | ||
1918 | err = -ENOBUFS; | |
1919 | ||
1920 | if (msg_sys.msg_controllen > INT_MAX) | |
1921 | goto out_freeiov; | |
89bddce5 | 1922 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1923 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 SH |
1924 | err = |
1925 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, | |
1926 | sizeof(ctl)); | |
1da177e4 LT |
1927 | if (err) |
1928 | goto out_freeiov; | |
1929 | ctl_buf = msg_sys.msg_control; | |
8920e8f9 | 1930 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1931 | } else if (ctl_len) { |
89bddce5 | 1932 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1933 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1934 | if (ctl_buf == NULL) |
1da177e4 LT |
1935 | goto out_freeiov; |
1936 | } | |
1937 | err = -EFAULT; | |
1938 | /* | |
1939 | * Careful! Before this, msg_sys.msg_control contains a user pointer. | |
1940 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted | |
1941 | * checking falls down on this. | |
1942 | */ | |
89bddce5 SH |
1943 | if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, |
1944 | ctl_len)) | |
1da177e4 LT |
1945 | goto out_freectl; |
1946 | msg_sys.msg_control = ctl_buf; | |
1947 | } | |
1948 | msg_sys.msg_flags = flags; | |
1949 | ||
1950 | if (sock->file->f_flags & O_NONBLOCK) | |
1951 | msg_sys.msg_flags |= MSG_DONTWAIT; | |
1952 | err = sock_sendmsg(sock, &msg_sys, total_len); | |
1953 | ||
1954 | out_freectl: | |
89bddce5 | 1955 | if (ctl_buf != ctl) |
1da177e4 LT |
1956 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
1957 | out_freeiov: | |
1958 | if (iov != iovstack) | |
1959 | sock_kfree_s(sock->sk, iov, iov_size); | |
1960 | out_put: | |
6cb153ca | 1961 | fput_light(sock->file, fput_needed); |
89bddce5 | 1962 | out: |
1da177e4 LT |
1963 | return err; |
1964 | } | |
1965 | ||
a2e27255 ACM |
1966 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
1967 | struct msghdr *msg_sys, unsigned flags, int nosec) | |
1da177e4 | 1968 | { |
89bddce5 SH |
1969 | struct compat_msghdr __user *msg_compat = |
1970 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1971 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 1972 | struct iovec *iov = iovstack; |
1da177e4 LT |
1973 | unsigned long cmsg_ptr; |
1974 | int err, iov_size, total_len, len; | |
1975 | ||
1976 | /* kernel mode address */ | |
230b1839 | 1977 | struct sockaddr_storage addr; |
1da177e4 LT |
1978 | |
1979 | /* user mode address pointers */ | |
1980 | struct sockaddr __user *uaddr; | |
1981 | int __user *uaddr_len; | |
89bddce5 | 1982 | |
1da177e4 | 1983 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 1984 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1985 | return -EFAULT; |
89bddce5 | 1986 | } |
a2e27255 | 1987 | else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 1988 | return -EFAULT; |
1da177e4 | 1989 | |
1da177e4 | 1990 | err = -EMSGSIZE; |
a2e27255 ACM |
1991 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
1992 | goto out; | |
89bddce5 SH |
1993 | |
1994 | /* Check whether to allocate the iovec area */ | |
1da177e4 | 1995 | err = -ENOMEM; |
a2e27255 ACM |
1996 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
1997 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { | |
1da177e4 LT |
1998 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
1999 | if (!iov) | |
a2e27255 | 2000 | goto out; |
1da177e4 LT |
2001 | } |
2002 | ||
2003 | /* | |
89bddce5 SH |
2004 | * Save the user-mode address (verify_iovec will change the |
2005 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2006 | */ |
89bddce5 | 2007 | |
a2e27255 | 2008 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2009 | uaddr_len = COMPAT_NAMELEN(msg); |
2010 | if (MSG_CMSG_COMPAT & flags) { | |
a2e27255 | 2011 | err = verify_compat_iovec(msg_sys, iov, |
230b1839 YH |
2012 | (struct sockaddr *)&addr, |
2013 | VERIFY_WRITE); | |
1da177e4 | 2014 | } else |
a2e27255 | 2015 | err = verify_iovec(msg_sys, iov, |
230b1839 YH |
2016 | (struct sockaddr *)&addr, |
2017 | VERIFY_WRITE); | |
1da177e4 LT |
2018 | if (err < 0) |
2019 | goto out_freeiov; | |
89bddce5 | 2020 | total_len = err; |
1da177e4 | 2021 | |
a2e27255 ACM |
2022 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2023 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2024 | |
1da177e4 LT |
2025 | if (sock->file->f_flags & O_NONBLOCK) |
2026 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2027 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2028 | total_len, flags); | |
1da177e4 LT |
2029 | if (err < 0) |
2030 | goto out_freeiov; | |
2031 | len = err; | |
2032 | ||
2033 | if (uaddr != NULL) { | |
230b1839 | 2034 | err = move_addr_to_user((struct sockaddr *)&addr, |
a2e27255 | 2035 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2036 | uaddr_len); |
1da177e4 LT |
2037 | if (err < 0) |
2038 | goto out_freeiov; | |
2039 | } | |
a2e27255 | 2040 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2041 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2042 | if (err) |
2043 | goto out_freeiov; | |
2044 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2045 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2046 | &msg_compat->msg_controllen); |
2047 | else | |
a2e27255 | 2048 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2049 | &msg->msg_controllen); |
2050 | if (err) | |
2051 | goto out_freeiov; | |
2052 | err = len; | |
2053 | ||
2054 | out_freeiov: | |
2055 | if (iov != iovstack) | |
2056 | sock_kfree_s(sock->sk, iov, iov_size); | |
a2e27255 ACM |
2057 | out: |
2058 | return err; | |
2059 | } | |
2060 | ||
2061 | /* | |
2062 | * BSD recvmsg interface | |
2063 | */ | |
2064 | ||
2065 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2066 | unsigned int, flags) | |
2067 | { | |
2068 | int fput_needed, err; | |
2069 | struct msghdr msg_sys; | |
2070 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2071 | ||
2072 | if (!sock) | |
2073 | goto out; | |
2074 | ||
2075 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2076 | ||
6cb153ca | 2077 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2078 | out: |
2079 | return err; | |
2080 | } | |
2081 | ||
a2e27255 ACM |
2082 | /* |
2083 | * Linux recvmmsg interface | |
2084 | */ | |
2085 | ||
2086 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2087 | unsigned int flags, struct timespec *timeout) | |
2088 | { | |
2089 | int fput_needed, err, datagrams; | |
2090 | struct socket *sock; | |
2091 | struct mmsghdr __user *entry; | |
d7256d0e | 2092 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2093 | struct msghdr msg_sys; |
2094 | struct timespec end_time; | |
2095 | ||
2096 | if (timeout && | |
2097 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2098 | timeout->tv_nsec)) | |
2099 | return -EINVAL; | |
2100 | ||
2101 | datagrams = 0; | |
2102 | ||
2103 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2104 | if (!sock) | |
2105 | return err; | |
2106 | ||
2107 | err = sock_error(sock->sk); | |
2108 | if (err) | |
2109 | goto out_put; | |
2110 | ||
2111 | entry = mmsg; | |
d7256d0e | 2112 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2113 | |
2114 | while (datagrams < vlen) { | |
2115 | /* | |
2116 | * No need to ask LSM for more than the first datagram. | |
2117 | */ | |
d7256d0e JMG |
2118 | if (MSG_CMSG_COMPAT & flags) { |
2119 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
2120 | &msg_sys, flags, datagrams); | |
2121 | if (err < 0) | |
2122 | break; | |
2123 | err = __put_user(err, &compat_entry->msg_len); | |
2124 | ++compat_entry; | |
2125 | } else { | |
2126 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
2127 | &msg_sys, flags, datagrams); | |
2128 | if (err < 0) | |
2129 | break; | |
2130 | err = put_user(err, &entry->msg_len); | |
2131 | ++entry; | |
2132 | } | |
2133 | ||
a2e27255 ACM |
2134 | if (err) |
2135 | break; | |
a2e27255 ACM |
2136 | ++datagrams; |
2137 | ||
71c5c159 BB |
2138 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2139 | if (flags & MSG_WAITFORONE) | |
2140 | flags |= MSG_DONTWAIT; | |
2141 | ||
a2e27255 ACM |
2142 | if (timeout) { |
2143 | ktime_get_ts(timeout); | |
2144 | *timeout = timespec_sub(end_time, *timeout); | |
2145 | if (timeout->tv_sec < 0) { | |
2146 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2147 | break; | |
2148 | } | |
2149 | ||
2150 | /* Timeout, return less than vlen datagrams */ | |
2151 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2152 | break; | |
2153 | } | |
2154 | ||
2155 | /* Out of band data, return right away */ | |
2156 | if (msg_sys.msg_flags & MSG_OOB) | |
2157 | break; | |
2158 | } | |
2159 | ||
2160 | out_put: | |
2161 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2162 | |
a2e27255 ACM |
2163 | if (err == 0) |
2164 | return datagrams; | |
2165 | ||
2166 | if (datagrams != 0) { | |
2167 | /* | |
2168 | * We may return less entries than requested (vlen) if the | |
2169 | * sock is non block and there aren't enough datagrams... | |
2170 | */ | |
2171 | if (err != -EAGAIN) { | |
2172 | /* | |
2173 | * ... or if recvmsg returns an error after we | |
2174 | * received some datagrams, where we record the | |
2175 | * error to return on the next call or if the | |
2176 | * app asks about it using getsockopt(SO_ERROR). | |
2177 | */ | |
2178 | sock->sk->sk_err = -err; | |
2179 | } | |
2180 | ||
2181 | return datagrams; | |
2182 | } | |
2183 | ||
2184 | return err; | |
2185 | } | |
2186 | ||
2187 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2188 | unsigned int, vlen, unsigned int, flags, | |
2189 | struct timespec __user *, timeout) | |
2190 | { | |
2191 | int datagrams; | |
2192 | struct timespec timeout_sys; | |
2193 | ||
2194 | if (!timeout) | |
2195 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2196 | ||
2197 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2198 | return -EFAULT; | |
2199 | ||
2200 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2201 | ||
2202 | if (datagrams > 0 && | |
2203 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2204 | datagrams = -EFAULT; | |
2205 | ||
2206 | return datagrams; | |
2207 | } | |
2208 | ||
2209 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2210 | /* Argument list sizes for sys_socketcall */ |
2211 | #define AL(x) ((x) * sizeof(unsigned long)) | |
a2e27255 | 2212 | static const unsigned char nargs[20] = { |
89bddce5 SH |
2213 | AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
2214 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), | |
aaca0bdc | 2215 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
a2e27255 | 2216 | AL(4),AL(5) |
89bddce5 SH |
2217 | }; |
2218 | ||
1da177e4 LT |
2219 | #undef AL |
2220 | ||
2221 | /* | |
89bddce5 | 2222 | * System call vectors. |
1da177e4 LT |
2223 | * |
2224 | * Argument checking cleaned up. Saved 20% in size. | |
2225 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2226 | * it is set by the callees. |
1da177e4 LT |
2227 | */ |
2228 | ||
3e0fa65f | 2229 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2230 | { |
2231 | unsigned long a[6]; | |
89bddce5 | 2232 | unsigned long a0, a1; |
1da177e4 | 2233 | int err; |
47379052 | 2234 | unsigned int len; |
1da177e4 | 2235 | |
a2e27255 | 2236 | if (call < 1 || call > SYS_RECVMMSG) |
1da177e4 LT |
2237 | return -EINVAL; |
2238 | ||
47379052 AV |
2239 | len = nargs[call]; |
2240 | if (len > sizeof(a)) | |
2241 | return -EINVAL; | |
2242 | ||
1da177e4 | 2243 | /* copy_from_user should be SMP safe. */ |
47379052 | 2244 | if (copy_from_user(a, args, len)) |
1da177e4 | 2245 | return -EFAULT; |
3ec3b2fb | 2246 | |
f3298dc4 | 2247 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2248 | |
89bddce5 SH |
2249 | a0 = a[0]; |
2250 | a1 = a[1]; | |
2251 | ||
2252 | switch (call) { | |
2253 | case SYS_SOCKET: | |
2254 | err = sys_socket(a0, a1, a[2]); | |
2255 | break; | |
2256 | case SYS_BIND: | |
2257 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2258 | break; | |
2259 | case SYS_CONNECT: | |
2260 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2261 | break; | |
2262 | case SYS_LISTEN: | |
2263 | err = sys_listen(a0, a1); | |
2264 | break; | |
2265 | case SYS_ACCEPT: | |
de11defe UD |
2266 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2267 | (int __user *)a[2], 0); | |
89bddce5 SH |
2268 | break; |
2269 | case SYS_GETSOCKNAME: | |
2270 | err = | |
2271 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2272 | (int __user *)a[2]); | |
2273 | break; | |
2274 | case SYS_GETPEERNAME: | |
2275 | err = | |
2276 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2277 | (int __user *)a[2]); | |
2278 | break; | |
2279 | case SYS_SOCKETPAIR: | |
2280 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2281 | break; | |
2282 | case SYS_SEND: | |
2283 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2284 | break; | |
2285 | case SYS_SENDTO: | |
2286 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2287 | (struct sockaddr __user *)a[4], a[5]); | |
2288 | break; | |
2289 | case SYS_RECV: | |
2290 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2291 | break; | |
2292 | case SYS_RECVFROM: | |
2293 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2294 | (struct sockaddr __user *)a[4], | |
2295 | (int __user *)a[5]); | |
2296 | break; | |
2297 | case SYS_SHUTDOWN: | |
2298 | err = sys_shutdown(a0, a1); | |
2299 | break; | |
2300 | case SYS_SETSOCKOPT: | |
2301 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2302 | break; | |
2303 | case SYS_GETSOCKOPT: | |
2304 | err = | |
2305 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2306 | (int __user *)a[4]); | |
2307 | break; | |
2308 | case SYS_SENDMSG: | |
2309 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2310 | break; | |
2311 | case SYS_RECVMSG: | |
2312 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2313 | break; | |
a2e27255 ACM |
2314 | case SYS_RECVMMSG: |
2315 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2316 | (struct timespec __user *)a[4]); | |
2317 | break; | |
de11defe UD |
2318 | case SYS_ACCEPT4: |
2319 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2320 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2321 | break; |
89bddce5 SH |
2322 | default: |
2323 | err = -EINVAL; | |
2324 | break; | |
1da177e4 LT |
2325 | } |
2326 | return err; | |
2327 | } | |
2328 | ||
89bddce5 | 2329 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2330 | |
55737fda SH |
2331 | /** |
2332 | * sock_register - add a socket protocol handler | |
2333 | * @ops: description of protocol | |
2334 | * | |
1da177e4 LT |
2335 | * This function is called by a protocol handler that wants to |
2336 | * advertise its address family, and have it linked into the | |
55737fda SH |
2337 | * socket interface. The value ops->family coresponds to the |
2338 | * socket system call protocol family. | |
1da177e4 | 2339 | */ |
f0fd27d4 | 2340 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2341 | { |
2342 | int err; | |
2343 | ||
2344 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2345 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2346 | NPROTO); | |
1da177e4 LT |
2347 | return -ENOBUFS; |
2348 | } | |
55737fda SH |
2349 | |
2350 | spin_lock(&net_family_lock); | |
2351 | if (net_families[ops->family]) | |
2352 | err = -EEXIST; | |
2353 | else { | |
89bddce5 | 2354 | net_families[ops->family] = ops; |
1da177e4 LT |
2355 | err = 0; |
2356 | } | |
55737fda SH |
2357 | spin_unlock(&net_family_lock); |
2358 | ||
89bddce5 | 2359 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2360 | return err; |
2361 | } | |
2362 | ||
55737fda SH |
2363 | /** |
2364 | * sock_unregister - remove a protocol handler | |
2365 | * @family: protocol family to remove | |
2366 | * | |
1da177e4 LT |
2367 | * This function is called by a protocol handler that wants to |
2368 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2369 | * new socket creation. |
2370 | * | |
2371 | * If protocol handler is a module, then it can use module reference | |
2372 | * counts to protect against new references. If protocol handler is not | |
2373 | * a module then it needs to provide its own protection in | |
2374 | * the ops->create routine. | |
1da177e4 | 2375 | */ |
f0fd27d4 | 2376 | void sock_unregister(int family) |
1da177e4 | 2377 | { |
f0fd27d4 | 2378 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2379 | |
55737fda | 2380 | spin_lock(&net_family_lock); |
89bddce5 | 2381 | net_families[family] = NULL; |
55737fda SH |
2382 | spin_unlock(&net_family_lock); |
2383 | ||
2384 | synchronize_rcu(); | |
2385 | ||
89bddce5 | 2386 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 LT |
2387 | } |
2388 | ||
77d76ea3 | 2389 | static int __init sock_init(void) |
1da177e4 LT |
2390 | { |
2391 | /* | |
89bddce5 | 2392 | * Initialize sock SLAB cache. |
1da177e4 | 2393 | */ |
89bddce5 | 2394 | |
1da177e4 LT |
2395 | sk_init(); |
2396 | ||
1da177e4 | 2397 | /* |
89bddce5 | 2398 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2399 | */ |
2400 | skb_init(); | |
1da177e4 LT |
2401 | |
2402 | /* | |
89bddce5 | 2403 | * Initialize the protocols module. |
1da177e4 LT |
2404 | */ |
2405 | ||
2406 | init_inodecache(); | |
2407 | register_filesystem(&sock_fs_type); | |
2408 | sock_mnt = kern_mount(&sock_fs_type); | |
77d76ea3 AK |
2409 | |
2410 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2411 | */ |
2412 | ||
2413 | #ifdef CONFIG_NETFILTER | |
2414 | netfilter_init(); | |
2415 | #endif | |
cbeb321a DM |
2416 | |
2417 | return 0; | |
1da177e4 LT |
2418 | } |
2419 | ||
77d76ea3 AK |
2420 | core_initcall(sock_init); /* early initcall */ |
2421 | ||
1da177e4 LT |
2422 | #ifdef CONFIG_PROC_FS |
2423 | void socket_seq_show(struct seq_file *seq) | |
2424 | { | |
2425 | int cpu; | |
2426 | int counter = 0; | |
2427 | ||
6f912042 | 2428 | for_each_possible_cpu(cpu) |
89bddce5 | 2429 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2430 | |
2431 | /* It can be negative, by the way. 8) */ | |
2432 | if (counter < 0) | |
2433 | counter = 0; | |
2434 | ||
2435 | seq_printf(seq, "sockets: used %d\n", counter); | |
2436 | } | |
89bddce5 | 2437 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2438 | |
89bbfc95 | 2439 | #ifdef CONFIG_COMPAT |
6b96018b AB |
2440 | static int do_siocgstamp(struct net *net, struct socket *sock, |
2441 | unsigned int cmd, struct compat_timeval __user *up) | |
7a229387 | 2442 | { |
7a229387 AB |
2443 | mm_segment_t old_fs = get_fs(); |
2444 | struct timeval ktv; | |
2445 | int err; | |
2446 | ||
2447 | set_fs(KERNEL_DS); | |
6b96018b | 2448 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 AB |
2449 | set_fs(old_fs); |
2450 | if (!err) { | |
2451 | err = put_user(ktv.tv_sec, &up->tv_sec); | |
2452 | err |= __put_user(ktv.tv_usec, &up->tv_usec); | |
2453 | } | |
2454 | return err; | |
2455 | } | |
2456 | ||
6b96018b AB |
2457 | static int do_siocgstampns(struct net *net, struct socket *sock, |
2458 | unsigned int cmd, struct compat_timespec __user *up) | |
7a229387 | 2459 | { |
7a229387 AB |
2460 | mm_segment_t old_fs = get_fs(); |
2461 | struct timespec kts; | |
2462 | int err; | |
2463 | ||
2464 | set_fs(KERNEL_DS); | |
6b96018b | 2465 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 AB |
2466 | set_fs(old_fs); |
2467 | if (!err) { | |
2468 | err = put_user(kts.tv_sec, &up->tv_sec); | |
2469 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); | |
2470 | } | |
2471 | return err; | |
2472 | } | |
2473 | ||
6b96018b | 2474 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2475 | { |
2476 | struct ifreq __user *uifr; | |
2477 | int err; | |
2478 | ||
2479 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2480 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2481 | return -EFAULT; |
2482 | ||
6b96018b | 2483 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2484 | if (err) |
2485 | return err; | |
2486 | ||
6b96018b | 2487 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2488 | return -EFAULT; |
2489 | ||
2490 | return 0; | |
2491 | } | |
2492 | ||
6b96018b | 2493 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2494 | { |
6b96018b | 2495 | struct compat_ifconf ifc32; |
7a229387 AB |
2496 | struct ifconf ifc; |
2497 | struct ifconf __user *uifc; | |
6b96018b | 2498 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2499 | struct ifreq __user *ifr; |
2500 | unsigned int i, j; | |
2501 | int err; | |
2502 | ||
6b96018b | 2503 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2504 | return -EFAULT; |
2505 | ||
2506 | if (ifc32.ifcbuf == 0) { | |
2507 | ifc32.ifc_len = 0; | |
2508 | ifc.ifc_len = 0; | |
2509 | ifc.ifc_req = NULL; | |
2510 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2511 | } else { | |
6b96018b | 2512 | size_t len =((ifc32.ifc_len / sizeof (struct compat_ifreq)) + 1) * |
7a229387 AB |
2513 | sizeof (struct ifreq); |
2514 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); | |
2515 | ifc.ifc_len = len; | |
2516 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2517 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
6b96018b AB |
2518 | for (i = 0; i < ifc32.ifc_len; i += sizeof (struct compat_ifreq)) { |
2519 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2520 | return -EFAULT; |
2521 | ifr++; | |
2522 | ifr32++; | |
2523 | } | |
2524 | } | |
2525 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2526 | return -EFAULT; | |
2527 | ||
6b96018b | 2528 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2529 | if (err) |
2530 | return err; | |
2531 | ||
2532 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2533 | return -EFAULT; | |
2534 | ||
2535 | ifr = ifc.ifc_req; | |
2536 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2537 | for (i = 0, j = 0; | |
6b96018b AB |
2538 | i + sizeof (struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2539 | i += sizeof (struct compat_ifreq), j += sizeof (struct ifreq)) { | |
2540 | if (copy_in_user(ifr32, ifr, sizeof (struct compat_ifreq))) | |
7a229387 AB |
2541 | return -EFAULT; |
2542 | ifr32++; | |
2543 | ifr++; | |
2544 | } | |
2545 | ||
2546 | if (ifc32.ifcbuf == 0) { | |
2547 | /* Translate from 64-bit structure multiple to | |
2548 | * a 32-bit one. | |
2549 | */ | |
2550 | i = ifc.ifc_len; | |
6b96018b | 2551 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2552 | ifc32.ifc_len = i; |
2553 | } else { | |
2554 | ifc32.ifc_len = i; | |
2555 | } | |
6b96018b | 2556 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2557 | return -EFAULT; |
2558 | ||
2559 | return 0; | |
2560 | } | |
2561 | ||
6b96018b | 2562 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 AB |
2563 | { |
2564 | struct ifreq __user *ifr; | |
7a229387 AB |
2565 | u32 data; |
2566 | void __user *datap; | |
2567 | ||
2568 | ifr = compat_alloc_user_space(sizeof(*ifr)); | |
7a229387 AB |
2569 | |
2570 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2571 | return -EFAULT; | |
2572 | ||
2573 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2574 | return -EFAULT; | |
2575 | ||
2576 | datap = compat_ptr(data); | |
2577 | if (put_user(datap, &ifr->ifr_ifru.ifru_data)) | |
2578 | return -EFAULT; | |
2579 | ||
6b96018b | 2580 | return dev_ioctl(net, SIOCETHTOOL, ifr); |
7a229387 AB |
2581 | } |
2582 | ||
7a50a240 AB |
2583 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2584 | { | |
2585 | void __user *uptr; | |
2586 | compat_uptr_t uptr32; | |
2587 | struct ifreq __user *uifr; | |
2588 | ||
2589 | uifr = compat_alloc_user_space(sizeof (*uifr)); | |
2590 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2591 | return -EFAULT; | |
2592 | ||
2593 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2594 | return -EFAULT; | |
2595 | ||
2596 | uptr = compat_ptr(uptr32); | |
2597 | ||
2598 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2599 | return -EFAULT; | |
2600 | ||
2601 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2602 | } | |
2603 | ||
6b96018b AB |
2604 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2605 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2606 | { |
2607 | struct ifreq kifr; | |
2608 | struct ifreq __user *uifr; | |
7a229387 AB |
2609 | mm_segment_t old_fs; |
2610 | int err; | |
2611 | u32 data; | |
2612 | void __user *datap; | |
2613 | ||
2614 | switch (cmd) { | |
2615 | case SIOCBONDENSLAVE: | |
2616 | case SIOCBONDRELEASE: | |
2617 | case SIOCBONDSETHWADDR: | |
2618 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2619 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2620 | return -EFAULT; |
2621 | ||
2622 | old_fs = get_fs(); | |
2623 | set_fs (KERNEL_DS); | |
6b96018b | 2624 | err = dev_ioctl(net, cmd, &kifr); |
7a229387 AB |
2625 | set_fs (old_fs); |
2626 | ||
2627 | return err; | |
2628 | case SIOCBONDSLAVEINFOQUERY: | |
2629 | case SIOCBONDINFOQUERY: | |
2630 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2631 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2632 | return -EFAULT; | |
2633 | ||
2634 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2635 | return -EFAULT; | |
2636 | ||
2637 | datap = compat_ptr(data); | |
2638 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2639 | return -EFAULT; | |
2640 | ||
6b96018b | 2641 | return dev_ioctl(net, cmd, uifr); |
7a229387 AB |
2642 | default: |
2643 | return -EINVAL; | |
2644 | }; | |
2645 | } | |
2646 | ||
6b96018b AB |
2647 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2648 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2649 | { |
2650 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2651 | char tmp_buf[IFNAMSIZ]; |
2652 | void __user *data64; | |
2653 | u32 data32; | |
2654 | ||
2655 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2656 | IFNAMSIZ)) | |
2657 | return -EFAULT; | |
2658 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2659 | return -EFAULT; | |
2660 | data64 = compat_ptr(data32); | |
2661 | ||
2662 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2663 | ||
2664 | /* Don't check these user accesses, just let that get trapped | |
2665 | * in the ioctl handler instead. | |
2666 | */ | |
2667 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2668 | IFNAMSIZ)) | |
2669 | return -EFAULT; | |
2670 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2671 | return -EFAULT; | |
2672 | ||
6b96018b | 2673 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2674 | } |
2675 | ||
6b96018b AB |
2676 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2677 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2678 | { |
a2116ed2 | 2679 | struct ifreq __user *uifr; |
7a229387 AB |
2680 | int err; |
2681 | ||
a2116ed2 AB |
2682 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2683 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2684 | return -EFAULT; | |
2685 | ||
2686 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2687 | ||
7a229387 AB |
2688 | if (!err) { |
2689 | switch (cmd) { | |
2690 | case SIOCGIFFLAGS: | |
2691 | case SIOCGIFMETRIC: | |
2692 | case SIOCGIFMTU: | |
2693 | case SIOCGIFMEM: | |
2694 | case SIOCGIFHWADDR: | |
2695 | case SIOCGIFINDEX: | |
2696 | case SIOCGIFADDR: | |
2697 | case SIOCGIFBRDADDR: | |
2698 | case SIOCGIFDSTADDR: | |
2699 | case SIOCGIFNETMASK: | |
fab2532b | 2700 | case SIOCGIFPFLAGS: |
7a229387 | 2701 | case SIOCGIFTXQLEN: |
fab2532b AB |
2702 | case SIOCGMIIPHY: |
2703 | case SIOCGMIIREG: | |
a2116ed2 | 2704 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2705 | err = -EFAULT; |
2706 | break; | |
2707 | } | |
2708 | } | |
2709 | return err; | |
2710 | } | |
2711 | ||
a2116ed2 AB |
2712 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2713 | struct compat_ifreq __user *uifr32) | |
2714 | { | |
2715 | struct ifreq ifr; | |
2716 | struct compat_ifmap __user *uifmap32; | |
2717 | mm_segment_t old_fs; | |
2718 | int err; | |
2719 | ||
2720 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2721 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
2722 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2723 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2724 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2725 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2726 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2727 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
2728 | if (err) | |
2729 | return -EFAULT; | |
2730 | ||
2731 | old_fs = get_fs(); | |
2732 | set_fs (KERNEL_DS); | |
2733 | err = dev_ioctl(net, cmd, (void __user *)&ifr); | |
2734 | set_fs (old_fs); | |
2735 | ||
2736 | if (cmd == SIOCGIFMAP && !err) { | |
2737 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
2738 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2739 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2740 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2741 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2742 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2743 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
2744 | if (err) | |
2745 | err = -EFAULT; | |
2746 | } | |
2747 | return err; | |
2748 | } | |
2749 | ||
2750 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
2751 | { | |
2752 | void __user *uptr; | |
2753 | compat_uptr_t uptr32; | |
2754 | struct ifreq __user *uifr; | |
2755 | ||
2756 | uifr = compat_alloc_user_space(sizeof (*uifr)); | |
2757 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2758 | return -EFAULT; | |
2759 | ||
2760 | if (get_user(uptr32, &uifr32->ifr_data)) | |
2761 | return -EFAULT; | |
2762 | ||
2763 | uptr = compat_ptr(uptr32); | |
2764 | ||
2765 | if (put_user(uptr, &uifr->ifr_data)) | |
2766 | return -EFAULT; | |
2767 | ||
2768 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
2769 | } | |
2770 | ||
7a229387 AB |
2771 | struct rtentry32 { |
2772 | u32 rt_pad1; | |
2773 | struct sockaddr rt_dst; /* target address */ | |
2774 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
2775 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
2776 | unsigned short rt_flags; | |
2777 | short rt_pad2; | |
2778 | u32 rt_pad3; | |
2779 | unsigned char rt_tos; | |
2780 | unsigned char rt_class; | |
2781 | short rt_pad4; | |
2782 | short rt_metric; /* +1 for binary compatibility! */ | |
2783 | /* char * */ u32 rt_dev; /* forcing the device at add */ | |
2784 | u32 rt_mtu; /* per route MTU/Window */ | |
2785 | u32 rt_window; /* Window clamping */ | |
2786 | unsigned short rt_irtt; /* Initial RTT */ | |
2787 | }; | |
2788 | ||
2789 | struct in6_rtmsg32 { | |
2790 | struct in6_addr rtmsg_dst; | |
2791 | struct in6_addr rtmsg_src; | |
2792 | struct in6_addr rtmsg_gateway; | |
2793 | u32 rtmsg_type; | |
2794 | u16 rtmsg_dst_len; | |
2795 | u16 rtmsg_src_len; | |
2796 | u32 rtmsg_metric; | |
2797 | u32 rtmsg_info; | |
2798 | u32 rtmsg_flags; | |
2799 | s32 rtmsg_ifindex; | |
2800 | }; | |
2801 | ||
6b96018b AB |
2802 | static int routing_ioctl(struct net *net, struct socket *sock, |
2803 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
2804 | { |
2805 | int ret; | |
2806 | void *r = NULL; | |
2807 | struct in6_rtmsg r6; | |
2808 | struct rtentry r4; | |
2809 | char devname[16]; | |
2810 | u32 rtdev; | |
2811 | mm_segment_t old_fs = get_fs(); | |
2812 | ||
6b96018b AB |
2813 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
2814 | struct in6_rtmsg32 __user *ur6 = argp; | |
7a229387 AB |
2815 | ret = copy_from_user (&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
2816 | 3 * sizeof(struct in6_addr)); | |
2817 | ret |= __get_user (r6.rtmsg_type, &(ur6->rtmsg_type)); | |
2818 | ret |= __get_user (r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
2819 | ret |= __get_user (r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
2820 | ret |= __get_user (r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
2821 | ret |= __get_user (r6.rtmsg_info, &(ur6->rtmsg_info)); | |
2822 | ret |= __get_user (r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
2823 | ret |= __get_user (r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
2824 | ||
2825 | r = (void *) &r6; | |
2826 | } else { /* ipv4 */ | |
6b96018b | 2827 | struct rtentry32 __user *ur4 = argp; |
7a229387 AB |
2828 | ret = copy_from_user (&r4.rt_dst, &(ur4->rt_dst), |
2829 | 3 * sizeof(struct sockaddr)); | |
2830 | ret |= __get_user (r4.rt_flags, &(ur4->rt_flags)); | |
2831 | ret |= __get_user (r4.rt_metric, &(ur4->rt_metric)); | |
2832 | ret |= __get_user (r4.rt_mtu, &(ur4->rt_mtu)); | |
2833 | ret |= __get_user (r4.rt_window, &(ur4->rt_window)); | |
2834 | ret |= __get_user (r4.rt_irtt, &(ur4->rt_irtt)); | |
2835 | ret |= __get_user (rtdev, &(ur4->rt_dev)); | |
2836 | if (rtdev) { | |
2837 | ret |= copy_from_user (devname, compat_ptr(rtdev), 15); | |
2838 | r4.rt_dev = devname; devname[15] = 0; | |
2839 | } else | |
2840 | r4.rt_dev = NULL; | |
2841 | ||
2842 | r = (void *) &r4; | |
2843 | } | |
2844 | ||
2845 | if (ret) { | |
2846 | ret = -EFAULT; | |
2847 | goto out; | |
2848 | } | |
2849 | ||
2850 | set_fs (KERNEL_DS); | |
6b96018b | 2851 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
7a229387 AB |
2852 | set_fs (old_fs); |
2853 | ||
2854 | out: | |
7a229387 AB |
2855 | return ret; |
2856 | } | |
2857 | ||
2858 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
2859 | * for some operations; this forces use of the newer bridge-utils that | |
2860 | * use compatiable ioctls | |
2861 | */ | |
6b96018b | 2862 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 2863 | { |
6b96018b | 2864 | compat_ulong_t tmp; |
7a229387 | 2865 | |
6b96018b | 2866 | if (get_user(tmp, argp)) |
7a229387 AB |
2867 | return -EFAULT; |
2868 | if (tmp == BRCTL_GET_VERSION) | |
2869 | return BRCTL_VERSION + 1; | |
2870 | return -EINVAL; | |
2871 | } | |
2872 | ||
6b96018b AB |
2873 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
2874 | unsigned int cmd, unsigned long arg) | |
2875 | { | |
2876 | void __user *argp = compat_ptr(arg); | |
2877 | struct sock *sk = sock->sk; | |
2878 | struct net *net = sock_net(sk); | |
7a229387 | 2879 | |
6b96018b AB |
2880 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
2881 | return siocdevprivate_ioctl(net, cmd, argp); | |
2882 | ||
2883 | switch (cmd) { | |
2884 | case SIOCSIFBR: | |
2885 | case SIOCGIFBR: | |
2886 | return old_bridge_ioctl(argp); | |
2887 | case SIOCGIFNAME: | |
2888 | return dev_ifname32(net, argp); | |
2889 | case SIOCGIFCONF: | |
2890 | return dev_ifconf(net, argp); | |
2891 | case SIOCETHTOOL: | |
2892 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
2893 | case SIOCWANDEV: |
2894 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
2895 | case SIOCGIFMAP: |
2896 | case SIOCSIFMAP: | |
2897 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
2898 | case SIOCBONDENSLAVE: |
2899 | case SIOCBONDRELEASE: | |
2900 | case SIOCBONDSETHWADDR: | |
2901 | case SIOCBONDSLAVEINFOQUERY: | |
2902 | case SIOCBONDINFOQUERY: | |
2903 | case SIOCBONDCHANGEACTIVE: | |
2904 | return bond_ioctl(net, cmd, argp); | |
2905 | case SIOCADDRT: | |
2906 | case SIOCDELRT: | |
2907 | return routing_ioctl(net, sock, cmd, argp); | |
2908 | case SIOCGSTAMP: | |
2909 | return do_siocgstamp(net, sock, cmd, argp); | |
2910 | case SIOCGSTAMPNS: | |
2911 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
2912 | case SIOCSHWTSTAMP: |
2913 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
2914 | |
2915 | case FIOSETOWN: | |
2916 | case SIOCSPGRP: | |
2917 | case FIOGETOWN: | |
2918 | case SIOCGPGRP: | |
2919 | case SIOCBRADDBR: | |
2920 | case SIOCBRDELBR: | |
2921 | case SIOCGIFVLAN: | |
2922 | case SIOCSIFVLAN: | |
2923 | case SIOCADDDLCI: | |
2924 | case SIOCDELDLCI: | |
2925 | return sock_ioctl(file, cmd, arg); | |
2926 | ||
2927 | case SIOCGIFFLAGS: | |
2928 | case SIOCSIFFLAGS: | |
2929 | case SIOCGIFMETRIC: | |
2930 | case SIOCSIFMETRIC: | |
2931 | case SIOCGIFMTU: | |
2932 | case SIOCSIFMTU: | |
2933 | case SIOCGIFMEM: | |
2934 | case SIOCSIFMEM: | |
2935 | case SIOCGIFHWADDR: | |
2936 | case SIOCSIFHWADDR: | |
2937 | case SIOCADDMULTI: | |
2938 | case SIOCDELMULTI: | |
2939 | case SIOCGIFINDEX: | |
6b96018b AB |
2940 | case SIOCGIFADDR: |
2941 | case SIOCSIFADDR: | |
2942 | case SIOCSIFHWBROADCAST: | |
6b96018b | 2943 | case SIOCDIFADDR: |
6b96018b AB |
2944 | case SIOCGIFBRDADDR: |
2945 | case SIOCSIFBRDADDR: | |
2946 | case SIOCGIFDSTADDR: | |
2947 | case SIOCSIFDSTADDR: | |
2948 | case SIOCGIFNETMASK: | |
2949 | case SIOCSIFNETMASK: | |
2950 | case SIOCSIFPFLAGS: | |
2951 | case SIOCGIFPFLAGS: | |
2952 | case SIOCGIFTXQLEN: | |
2953 | case SIOCSIFTXQLEN: | |
2954 | case SIOCBRADDIF: | |
2955 | case SIOCBRDELIF: | |
9177efd3 AB |
2956 | case SIOCSIFNAME: |
2957 | case SIOCGMIIPHY: | |
2958 | case SIOCGMIIREG: | |
2959 | case SIOCSMIIREG: | |
6b96018b | 2960 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 2961 | |
6b96018b AB |
2962 | case SIOCSARP: |
2963 | case SIOCGARP: | |
2964 | case SIOCDARP: | |
6b96018b | 2965 | case SIOCATMARK: |
9177efd3 AB |
2966 | return sock_do_ioctl(net, sock, cmd, arg); |
2967 | } | |
2968 | ||
2969 | /* Prevent warning from compat_sys_ioctl, these always | |
2970 | * result in -EINVAL in the native case anyway. */ | |
2971 | switch (cmd) { | |
2972 | case SIOCRTMSG: | |
2973 | case SIOCGIFCOUNT: | |
6b96018b AB |
2974 | case SIOCSRARP: |
2975 | case SIOCGRARP: | |
2976 | case SIOCDRARP: | |
9177efd3 AB |
2977 | case SIOCSIFLINK: |
2978 | case SIOCGIFSLAVE: | |
2979 | case SIOCSIFSLAVE: | |
2980 | return -EINVAL; | |
6b96018b AB |
2981 | } |
2982 | ||
2983 | return -ENOIOCTLCMD; | |
2984 | } | |
7a229387 | 2985 | |
89bbfc95 | 2986 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
89bddce5 | 2987 | unsigned long arg) |
89bbfc95 SP |
2988 | { |
2989 | struct socket *sock = file->private_data; | |
2990 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
2991 | struct sock *sk; |
2992 | struct net *net; | |
2993 | ||
2994 | sk = sock->sk; | |
2995 | net = sock_net(sk); | |
89bbfc95 SP |
2996 | |
2997 | if (sock->ops->compat_ioctl) | |
2998 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
2999 | ||
87de87d5 DM |
3000 | if (ret == -ENOIOCTLCMD && |
3001 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3002 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3003 | ||
6b96018b AB |
3004 | if (ret == -ENOIOCTLCMD) |
3005 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3006 | ||
89bbfc95 SP |
3007 | return ret; |
3008 | } | |
3009 | #endif | |
3010 | ||
ac5a488e SS |
3011 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3012 | { | |
3013 | return sock->ops->bind(sock, addr, addrlen); | |
3014 | } | |
3015 | ||
3016 | int kernel_listen(struct socket *sock, int backlog) | |
3017 | { | |
3018 | return sock->ops->listen(sock, backlog); | |
3019 | } | |
3020 | ||
3021 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3022 | { | |
3023 | struct sock *sk = sock->sk; | |
3024 | int err; | |
3025 | ||
3026 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3027 | newsock); | |
3028 | if (err < 0) | |
3029 | goto done; | |
3030 | ||
3031 | err = sock->ops->accept(sock, *newsock, flags); | |
3032 | if (err < 0) { | |
3033 | sock_release(*newsock); | |
fa8705b0 | 3034 | *newsock = NULL; |
ac5a488e SS |
3035 | goto done; |
3036 | } | |
3037 | ||
3038 | (*newsock)->ops = sock->ops; | |
1b08534e | 3039 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3040 | |
3041 | done: | |
3042 | return err; | |
3043 | } | |
3044 | ||
3045 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3046 | int flags) |
ac5a488e SS |
3047 | { |
3048 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3049 | } | |
3050 | ||
3051 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3052 | int *addrlen) | |
3053 | { | |
3054 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3055 | } | |
3056 | ||
3057 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3058 | int *addrlen) | |
3059 | { | |
3060 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3061 | } | |
3062 | ||
3063 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3064 | char *optval, int *optlen) | |
3065 | { | |
3066 | mm_segment_t oldfs = get_fs(); | |
3067 | int err; | |
3068 | ||
3069 | set_fs(KERNEL_DS); | |
3070 | if (level == SOL_SOCKET) | |
3071 | err = sock_getsockopt(sock, level, optname, optval, optlen); | |
3072 | else | |
3073 | err = sock->ops->getsockopt(sock, level, optname, optval, | |
3074 | optlen); | |
3075 | set_fs(oldfs); | |
3076 | return err; | |
3077 | } | |
3078 | ||
3079 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3080 | char *optval, unsigned int optlen) |
ac5a488e SS |
3081 | { |
3082 | mm_segment_t oldfs = get_fs(); | |
3083 | int err; | |
3084 | ||
3085 | set_fs(KERNEL_DS); | |
3086 | if (level == SOL_SOCKET) | |
3087 | err = sock_setsockopt(sock, level, optname, optval, optlen); | |
3088 | else | |
3089 | err = sock->ops->setsockopt(sock, level, optname, optval, | |
3090 | optlen); | |
3091 | set_fs(oldfs); | |
3092 | return err; | |
3093 | } | |
3094 | ||
3095 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3096 | size_t size, int flags) | |
3097 | { | |
3098 | if (sock->ops->sendpage) | |
3099 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3100 | ||
3101 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3102 | } | |
3103 | ||
3104 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3105 | { | |
3106 | mm_segment_t oldfs = get_fs(); | |
3107 | int err; | |
3108 | ||
3109 | set_fs(KERNEL_DS); | |
3110 | err = sock->ops->ioctl(sock, cmd, arg); | |
3111 | set_fs(oldfs); | |
3112 | ||
3113 | return err; | |
3114 | } | |
3115 | ||
91cf45f0 TM |
3116 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3117 | { | |
3118 | return sock->ops->shutdown(sock, how); | |
3119 | } | |
3120 | ||
1da177e4 LT |
3121 | EXPORT_SYMBOL(sock_create); |
3122 | EXPORT_SYMBOL(sock_create_kern); | |
3123 | EXPORT_SYMBOL(sock_create_lite); | |
3124 | EXPORT_SYMBOL(sock_map_fd); | |
3125 | EXPORT_SYMBOL(sock_recvmsg); | |
3126 | EXPORT_SYMBOL(sock_register); | |
3127 | EXPORT_SYMBOL(sock_release); | |
3128 | EXPORT_SYMBOL(sock_sendmsg); | |
3129 | EXPORT_SYMBOL(sock_unregister); | |
3130 | EXPORT_SYMBOL(sock_wake_async); | |
3131 | EXPORT_SYMBOL(sockfd_lookup); | |
3132 | EXPORT_SYMBOL(kernel_sendmsg); | |
3133 | EXPORT_SYMBOL(kernel_recvmsg); | |
ac5a488e SS |
3134 | EXPORT_SYMBOL(kernel_bind); |
3135 | EXPORT_SYMBOL(kernel_listen); | |
3136 | EXPORT_SYMBOL(kernel_accept); | |
3137 | EXPORT_SYMBOL(kernel_connect); | |
3138 | EXPORT_SYMBOL(kernel_getsockname); | |
3139 | EXPORT_SYMBOL(kernel_getpeername); | |
3140 | EXPORT_SYMBOL(kernel_getsockopt); | |
3141 | EXPORT_SYMBOL(kernel_setsockopt); | |
3142 | EXPORT_SYMBOL(kernel_sendpage); | |
3143 | EXPORT_SYMBOL(kernel_sock_ioctl); | |
91cf45f0 | 3144 | EXPORT_SYMBOL(kernel_sock_shutdown); |