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> | |
103 | #include <linux/atmdev.h> | |
104 | #include <linux/atmarp.h> | |
105 | #include <linux/atmsvc.h> | |
106 | #include <linux/atmlec.h> | |
107 | #include <linux/atmclip.h> | |
108 | #include <linux/atmmpc.h> | |
109 | #include <linux/atm_tcp.h> | |
110 | #include <linux/sonet.h> | |
111 | #include <linux/sockios.h> | |
112 | #include <linux/atalk.h> | |
113 | ||
1da177e4 | 114 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
115 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
116 | unsigned long nr_segs, loff_t pos); | |
117 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
118 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 119 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
120 | |
121 | static int sock_close(struct inode *inode, struct file *file); | |
122 | static unsigned int sock_poll(struct file *file, | |
123 | struct poll_table_struct *wait); | |
89bddce5 | 124 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
125 | #ifdef CONFIG_COMPAT |
126 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 127 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 128 | #endif |
1da177e4 | 129 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
130 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
131 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c JA |
132 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
133 | struct pipe_inode_info *pipe, size_t len, | |
134 | unsigned int flags); | |
1da177e4 | 135 | |
1da177e4 LT |
136 | /* |
137 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
138 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
139 | */ | |
140 | ||
da7071d7 | 141 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
142 | .owner = THIS_MODULE, |
143 | .llseek = no_llseek, | |
144 | .aio_read = sock_aio_read, | |
145 | .aio_write = sock_aio_write, | |
146 | .poll = sock_poll, | |
147 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
148 | #ifdef CONFIG_COMPAT |
149 | .compat_ioctl = compat_sock_ioctl, | |
150 | #endif | |
1da177e4 LT |
151 | .mmap = sock_mmap, |
152 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
153 | .release = sock_close, | |
154 | .fasync = sock_fasync, | |
5274f052 JA |
155 | .sendpage = sock_sendpage, |
156 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 157 | .splice_read = sock_splice_read, |
1da177e4 LT |
158 | }; |
159 | ||
160 | /* | |
161 | * The protocol list. Each protocol is registered in here. | |
162 | */ | |
163 | ||
1da177e4 | 164 | static DEFINE_SPINLOCK(net_family_lock); |
f0fd27d4 | 165 | static const struct net_proto_family *net_families[NPROTO] __read_mostly; |
1da177e4 | 166 | |
1da177e4 LT |
167 | /* |
168 | * Statistics counters of the socket lists | |
169 | */ | |
170 | ||
171 | static DEFINE_PER_CPU(int, sockets_in_use) = 0; | |
172 | ||
173 | /* | |
89bddce5 SH |
174 | * Support routines. |
175 | * Move socket addresses back and forth across the kernel/user | |
176 | * divide and look after the messy bits. | |
1da177e4 LT |
177 | */ |
178 | ||
89bddce5 | 179 | #define MAX_SOCK_ADDR 128 /* 108 for Unix domain - |
1da177e4 LT |
180 | 16 for IP, 16 for IPX, |
181 | 24 for IPv6, | |
89bddce5 | 182 | about 80 for AX.25 |
1da177e4 LT |
183 | must be at least one bigger than |
184 | the AF_UNIX size (see net/unix/af_unix.c | |
89bddce5 | 185 | :unix_mkname()). |
1da177e4 | 186 | */ |
89bddce5 | 187 | |
1da177e4 LT |
188 | /** |
189 | * move_addr_to_kernel - copy a socket address into kernel space | |
190 | * @uaddr: Address in user space | |
191 | * @kaddr: Address in kernel space | |
192 | * @ulen: Length in user space | |
193 | * | |
194 | * The address is copied into kernel space. If the provided address is | |
195 | * too long an error code of -EINVAL is returned. If the copy gives | |
196 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
197 | */ | |
198 | ||
230b1839 | 199 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) |
1da177e4 | 200 | { |
230b1839 | 201 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 202 | return -EINVAL; |
89bddce5 | 203 | if (ulen == 0) |
1da177e4 | 204 | return 0; |
89bddce5 | 205 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 206 | return -EFAULT; |
3ec3b2fb | 207 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
208 | } |
209 | ||
210 | /** | |
211 | * move_addr_to_user - copy an address to user space | |
212 | * @kaddr: kernel space address | |
213 | * @klen: length of address in kernel | |
214 | * @uaddr: user space address | |
215 | * @ulen: pointer to user length field | |
216 | * | |
217 | * The value pointed to by ulen on entry is the buffer length available. | |
218 | * This is overwritten with the buffer space used. -EINVAL is returned | |
219 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
220 | * is returned if either the buffer or the length field are not | |
221 | * accessible. | |
222 | * After copying the data up to the limit the user specifies, the true | |
223 | * length of the data is written over the length limit the user | |
224 | * specified. Zero is returned for a success. | |
225 | */ | |
89bddce5 | 226 | |
230b1839 | 227 | int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, |
89bddce5 | 228 | int __user *ulen) |
1da177e4 LT |
229 | { |
230 | int err; | |
231 | int len; | |
232 | ||
89bddce5 SH |
233 | err = get_user(len, ulen); |
234 | if (err) | |
1da177e4 | 235 | return err; |
89bddce5 SH |
236 | if (len > klen) |
237 | len = klen; | |
230b1839 | 238 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 239 | return -EINVAL; |
89bddce5 | 240 | if (len) { |
d6fe3945 SG |
241 | if (audit_sockaddr(klen, kaddr)) |
242 | return -ENOMEM; | |
89bddce5 | 243 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
244 | return -EFAULT; |
245 | } | |
246 | /* | |
89bddce5 SH |
247 | * "fromlen shall refer to the value before truncation.." |
248 | * 1003.1g | |
1da177e4 LT |
249 | */ |
250 | return __put_user(klen, ulen); | |
251 | } | |
252 | ||
e18b890b | 253 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
254 | |
255 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
256 | { | |
257 | struct socket_alloc *ei; | |
89bddce5 | 258 | |
e94b1766 | 259 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
260 | if (!ei) |
261 | return NULL; | |
262 | init_waitqueue_head(&ei->socket.wait); | |
89bddce5 | 263 | |
1da177e4 LT |
264 | ei->socket.fasync_list = NULL; |
265 | ei->socket.state = SS_UNCONNECTED; | |
266 | ei->socket.flags = 0; | |
267 | ei->socket.ops = NULL; | |
268 | ei->socket.sk = NULL; | |
269 | ei->socket.file = NULL; | |
1da177e4 LT |
270 | |
271 | return &ei->vfs_inode; | |
272 | } | |
273 | ||
274 | static void sock_destroy_inode(struct inode *inode) | |
275 | { | |
276 | kmem_cache_free(sock_inode_cachep, | |
277 | container_of(inode, struct socket_alloc, vfs_inode)); | |
278 | } | |
279 | ||
51cc5068 | 280 | static void init_once(void *foo) |
1da177e4 | 281 | { |
89bddce5 | 282 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 283 | |
a35afb83 | 284 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 285 | } |
89bddce5 | 286 | |
1da177e4 LT |
287 | static int init_inodecache(void) |
288 | { | |
289 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
290 | sizeof(struct socket_alloc), |
291 | 0, | |
292 | (SLAB_HWCACHE_ALIGN | | |
293 | SLAB_RECLAIM_ACCOUNT | | |
294 | SLAB_MEM_SPREAD), | |
20c2df83 | 295 | init_once); |
1da177e4 LT |
296 | if (sock_inode_cachep == NULL) |
297 | return -ENOMEM; | |
298 | return 0; | |
299 | } | |
300 | ||
b87221de | 301 | static const struct super_operations sockfs_ops = { |
1da177e4 LT |
302 | .alloc_inode = sock_alloc_inode, |
303 | .destroy_inode =sock_destroy_inode, | |
304 | .statfs = simple_statfs, | |
305 | }; | |
306 | ||
454e2398 | 307 | static int sockfs_get_sb(struct file_system_type *fs_type, |
89bddce5 SH |
308 | int flags, const char *dev_name, void *data, |
309 | struct vfsmount *mnt) | |
1da177e4 | 310 | { |
454e2398 DH |
311 | return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC, |
312 | mnt); | |
1da177e4 LT |
313 | } |
314 | ||
ba89966c | 315 | static struct vfsmount *sock_mnt __read_mostly; |
1da177e4 LT |
316 | |
317 | static struct file_system_type sock_fs_type = { | |
318 | .name = "sockfs", | |
319 | .get_sb = sockfs_get_sb, | |
320 | .kill_sb = kill_anon_super, | |
321 | }; | |
89bddce5 | 322 | |
1da177e4 LT |
323 | static int sockfs_delete_dentry(struct dentry *dentry) |
324 | { | |
304e61e6 ED |
325 | /* |
326 | * At creation time, we pretended this dentry was hashed | |
327 | * (by clearing DCACHE_UNHASHED bit in d_flags) | |
328 | * At delete time, we restore the truth : not hashed. | |
329 | * (so that dput() can proceed correctly) | |
330 | */ | |
331 | dentry->d_flags |= DCACHE_UNHASHED; | |
332 | return 0; | |
1da177e4 | 333 | } |
c23fbb6b ED |
334 | |
335 | /* | |
336 | * sockfs_dname() is called from d_path(). | |
337 | */ | |
338 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
339 | { | |
340 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
341 | dentry->d_inode->i_ino); | |
342 | } | |
343 | ||
3ba13d17 | 344 | static const struct dentry_operations sockfs_dentry_operations = { |
89bddce5 | 345 | .d_delete = sockfs_delete_dentry, |
c23fbb6b | 346 | .d_dname = sockfs_dname, |
1da177e4 LT |
347 | }; |
348 | ||
349 | /* | |
350 | * Obtains the first available file descriptor and sets it up for use. | |
351 | * | |
39d8c1b6 DM |
352 | * These functions create file structures and maps them to fd space |
353 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
354 | * and file struct implicitly stored in sock->file. |
355 | * Note that another thread may close file descriptor before we return | |
356 | * from this function. We use the fact that now we do not refer | |
357 | * to socket after mapping. If one day we will need it, this | |
358 | * function will increment ref. count on file by 1. | |
359 | * | |
360 | * In any case returned fd MAY BE not valid! | |
361 | * This race condition is unavoidable | |
362 | * with shared fd spaces, we cannot solve it inside kernel, | |
363 | * but we take care of internal coherence yet. | |
364 | */ | |
365 | ||
a677a039 | 366 | static int sock_alloc_fd(struct file **filep, int flags) |
1da177e4 LT |
367 | { |
368 | int fd; | |
1da177e4 | 369 | |
a677a039 | 370 | fd = get_unused_fd_flags(flags); |
39d8c1b6 | 371 | if (likely(fd >= 0)) { |
1da177e4 LT |
372 | struct file *file = get_empty_filp(); |
373 | ||
39d8c1b6 DM |
374 | *filep = file; |
375 | if (unlikely(!file)) { | |
1da177e4 | 376 | put_unused_fd(fd); |
39d8c1b6 | 377 | return -ENFILE; |
1da177e4 | 378 | } |
39d8c1b6 DM |
379 | } else |
380 | *filep = NULL; | |
381 | return fd; | |
382 | } | |
1da177e4 | 383 | |
77d27200 | 384 | static int sock_attach_fd(struct socket *sock, struct file *file, int flags) |
39d8c1b6 | 385 | { |
ce8d2cdf | 386 | struct dentry *dentry; |
c23fbb6b | 387 | struct qstr name = { .name = "" }; |
39d8c1b6 | 388 | |
ce8d2cdf DH |
389 | dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); |
390 | if (unlikely(!dentry)) | |
39d8c1b6 DM |
391 | return -ENOMEM; |
392 | ||
ce8d2cdf | 393 | dentry->d_op = &sockfs_dentry_operations; |
304e61e6 ED |
394 | /* |
395 | * We dont want to push this dentry into global dentry hash table. | |
396 | * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED | |
397 | * This permits a working /proc/$pid/fd/XXX on sockets | |
398 | */ | |
ce8d2cdf DH |
399 | dentry->d_flags &= ~DCACHE_UNHASHED; |
400 | d_instantiate(dentry, SOCK_INODE(sock)); | |
39d8c1b6 DM |
401 | |
402 | sock->file = file; | |
ce8d2cdf DH |
403 | init_file(file, sock_mnt, dentry, FMODE_READ | FMODE_WRITE, |
404 | &socket_file_ops); | |
405 | SOCK_INODE(sock)->i_fop = &socket_file_ops; | |
77d27200 | 406 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
407 | file->f_pos = 0; |
408 | file->private_data = sock; | |
1da177e4 | 409 | |
39d8c1b6 DM |
410 | return 0; |
411 | } | |
412 | ||
a677a039 | 413 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
414 | { |
415 | struct file *newfile; | |
a677a039 | 416 | int fd = sock_alloc_fd(&newfile, flags); |
39d8c1b6 DM |
417 | |
418 | if (likely(fd >= 0)) { | |
77d27200 | 419 | int err = sock_attach_fd(sock, newfile, flags); |
39d8c1b6 DM |
420 | |
421 | if (unlikely(err < 0)) { | |
422 | put_filp(newfile); | |
1da177e4 | 423 | put_unused_fd(fd); |
39d8c1b6 | 424 | return err; |
1da177e4 | 425 | } |
39d8c1b6 | 426 | fd_install(fd, newfile); |
1da177e4 | 427 | } |
1da177e4 LT |
428 | return fd; |
429 | } | |
430 | ||
6cb153ca BL |
431 | static struct socket *sock_from_file(struct file *file, int *err) |
432 | { | |
6cb153ca BL |
433 | if (file->f_op == &socket_file_ops) |
434 | return file->private_data; /* set in sock_map_fd */ | |
435 | ||
23bb80d2 ED |
436 | *err = -ENOTSOCK; |
437 | return NULL; | |
6cb153ca BL |
438 | } |
439 | ||
1da177e4 LT |
440 | /** |
441 | * sockfd_lookup - Go from a file number to its socket slot | |
442 | * @fd: file handle | |
443 | * @err: pointer to an error code return | |
444 | * | |
445 | * The file handle passed in is locked and the socket it is bound | |
446 | * too is returned. If an error occurs the err pointer is overwritten | |
447 | * with a negative errno code and NULL is returned. The function checks | |
448 | * for both invalid handles and passing a handle which is not a socket. | |
449 | * | |
450 | * On a success the socket object pointer is returned. | |
451 | */ | |
452 | ||
453 | struct socket *sockfd_lookup(int fd, int *err) | |
454 | { | |
455 | struct file *file; | |
1da177e4 LT |
456 | struct socket *sock; |
457 | ||
89bddce5 SH |
458 | file = fget(fd); |
459 | if (!file) { | |
1da177e4 LT |
460 | *err = -EBADF; |
461 | return NULL; | |
462 | } | |
89bddce5 | 463 | |
6cb153ca BL |
464 | sock = sock_from_file(file, err); |
465 | if (!sock) | |
1da177e4 | 466 | fput(file); |
6cb153ca BL |
467 | return sock; |
468 | } | |
1da177e4 | 469 | |
6cb153ca BL |
470 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
471 | { | |
472 | struct file *file; | |
473 | struct socket *sock; | |
474 | ||
3672558c | 475 | *err = -EBADF; |
6cb153ca BL |
476 | file = fget_light(fd, fput_needed); |
477 | if (file) { | |
478 | sock = sock_from_file(file, err); | |
479 | if (sock) | |
480 | return sock; | |
481 | fput_light(file, *fput_needed); | |
1da177e4 | 482 | } |
6cb153ca | 483 | return NULL; |
1da177e4 LT |
484 | } |
485 | ||
486 | /** | |
487 | * sock_alloc - allocate a socket | |
89bddce5 | 488 | * |
1da177e4 LT |
489 | * Allocate a new inode and socket object. The two are bound together |
490 | * and initialised. The socket is then returned. If we are out of inodes | |
491 | * NULL is returned. | |
492 | */ | |
493 | ||
494 | static struct socket *sock_alloc(void) | |
495 | { | |
89bddce5 SH |
496 | struct inode *inode; |
497 | struct socket *sock; | |
1da177e4 LT |
498 | |
499 | inode = new_inode(sock_mnt->mnt_sb); | |
500 | if (!inode) | |
501 | return NULL; | |
502 | ||
503 | sock = SOCKET_I(inode); | |
504 | ||
29a020d3 | 505 | kmemcheck_annotate_bitfield(sock, type); |
89bddce5 | 506 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
507 | inode->i_uid = current_fsuid(); |
508 | inode->i_gid = current_fsgid(); | |
1da177e4 | 509 | |
4e69489a | 510 | percpu_add(sockets_in_use, 1); |
1da177e4 LT |
511 | return sock; |
512 | } | |
513 | ||
514 | /* | |
515 | * In theory you can't get an open on this inode, but /proc provides | |
516 | * a back door. Remember to keep it shut otherwise you'll let the | |
517 | * creepy crawlies in. | |
518 | */ | |
89bddce5 | 519 | |
1da177e4 LT |
520 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
521 | { | |
522 | return -ENXIO; | |
523 | } | |
524 | ||
4b6f5d20 | 525 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
526 | .owner = THIS_MODULE, |
527 | .open = sock_no_open, | |
528 | }; | |
529 | ||
530 | /** | |
531 | * sock_release - close a socket | |
532 | * @sock: socket to close | |
533 | * | |
534 | * The socket is released from the protocol stack if it has a release | |
535 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 536 | * an inode not a file. |
1da177e4 | 537 | */ |
89bddce5 | 538 | |
1da177e4 LT |
539 | void sock_release(struct socket *sock) |
540 | { | |
541 | if (sock->ops) { | |
542 | struct module *owner = sock->ops->owner; | |
543 | ||
544 | sock->ops->release(sock); | |
545 | sock->ops = NULL; | |
546 | module_put(owner); | |
547 | } | |
548 | ||
549 | if (sock->fasync_list) | |
550 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); | |
551 | ||
4e69489a | 552 | percpu_sub(sockets_in_use, 1); |
1da177e4 LT |
553 | if (!sock->file) { |
554 | iput(SOCK_INODE(sock)); | |
555 | return; | |
556 | } | |
89bddce5 | 557 | sock->file = NULL; |
1da177e4 LT |
558 | } |
559 | ||
20d49473 PO |
560 | int sock_tx_timestamp(struct msghdr *msg, struct sock *sk, |
561 | union skb_shared_tx *shtx) | |
562 | { | |
563 | shtx->flags = 0; | |
564 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) | |
565 | shtx->hardware = 1; | |
566 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) | |
567 | shtx->software = 1; | |
568 | return 0; | |
569 | } | |
570 | EXPORT_SYMBOL(sock_tx_timestamp); | |
571 | ||
89bddce5 | 572 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
573 | struct msghdr *msg, size_t size) |
574 | { | |
575 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
576 | int err; | |
577 | ||
578 | si->sock = sock; | |
579 | si->scm = NULL; | |
580 | si->msg = msg; | |
581 | si->size = size; | |
582 | ||
583 | err = security_socket_sendmsg(sock, msg, size); | |
584 | if (err) | |
585 | return err; | |
586 | ||
587 | return sock->ops->sendmsg(iocb, sock, msg, size); | |
588 | } | |
589 | ||
590 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
591 | { | |
592 | struct kiocb iocb; | |
593 | struct sock_iocb siocb; | |
594 | int ret; | |
595 | ||
596 | init_sync_kiocb(&iocb, NULL); | |
597 | iocb.private = &siocb; | |
598 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
599 | if (-EIOCBQUEUED == ret) | |
600 | ret = wait_on_sync_kiocb(&iocb); | |
601 | return ret; | |
602 | } | |
603 | ||
604 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
605 | struct kvec *vec, size_t num, size_t size) | |
606 | { | |
607 | mm_segment_t oldfs = get_fs(); | |
608 | int result; | |
609 | ||
610 | set_fs(KERNEL_DS); | |
611 | /* | |
612 | * the following is safe, since for compiler definitions of kvec and | |
613 | * iovec are identical, yielding the same in-core layout and alignment | |
614 | */ | |
89bddce5 | 615 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
616 | msg->msg_iovlen = num; |
617 | result = sock_sendmsg(sock, msg, size); | |
618 | set_fs(oldfs); | |
619 | return result; | |
620 | } | |
621 | ||
20d49473 PO |
622 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
623 | { | |
624 | if (kt.tv64) { | |
625 | *ts = ktime_to_timespec(kt); | |
626 | return 1; | |
627 | } else { | |
628 | return 0; | |
629 | } | |
630 | } | |
631 | ||
92f37fd2 ED |
632 | /* |
633 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
634 | */ | |
635 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
636 | struct sk_buff *skb) | |
637 | { | |
20d49473 PO |
638 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
639 | struct timespec ts[3]; | |
640 | int empty = 1; | |
641 | struct skb_shared_hwtstamps *shhwtstamps = | |
642 | skb_hwtstamps(skb); | |
643 | ||
644 | /* Race occurred between timestamp enabling and packet | |
645 | receiving. Fill in the current time for now. */ | |
646 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
647 | __net_timestamp(skb); | |
648 | ||
649 | if (need_software_tstamp) { | |
650 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
651 | struct timeval tv; | |
652 | skb_get_timestamp(skb, &tv); | |
653 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
654 | sizeof(tv), &tv); | |
655 | } else { | |
656 | struct timespec ts; | |
657 | skb_get_timestampns(skb, &ts); | |
658 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, | |
659 | sizeof(ts), &ts); | |
660 | } | |
661 | } | |
662 | ||
663 | ||
664 | memset(ts, 0, sizeof(ts)); | |
665 | if (skb->tstamp.tv64 && | |
666 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
667 | skb_get_timestampns(skb, ts + 0); | |
668 | empty = 0; | |
669 | } | |
670 | if (shhwtstamps) { | |
671 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
672 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
673 | empty = 0; | |
674 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
675 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
676 | empty = 0; | |
92f37fd2 | 677 | } |
20d49473 PO |
678 | if (!empty) |
679 | put_cmsg(msg, SOL_SOCKET, | |
680 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 ED |
681 | } |
682 | ||
7c81fd8b ACM |
683 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
684 | ||
3b885787 NH |
685 | inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) |
686 | { | |
687 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
688 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
689 | sizeof(__u32), &skb->dropcount); | |
690 | } | |
691 | ||
692 | void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, | |
693 | struct sk_buff *skb) | |
694 | { | |
695 | sock_recv_timestamp(msg, sk, skb); | |
696 | sock_recv_drops(msg, sk, skb); | |
697 | } | |
698 | EXPORT_SYMBOL_GPL(sock_recv_ts_and_drops); | |
699 | ||
a2e27255 ACM |
700 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
701 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 702 | { |
1da177e4 LT |
703 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
704 | ||
705 | si->sock = sock; | |
706 | si->scm = NULL; | |
707 | si->msg = msg; | |
708 | si->size = size; | |
709 | si->flags = flags; | |
710 | ||
1da177e4 LT |
711 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
712 | } | |
713 | ||
a2e27255 ACM |
714 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
715 | struct msghdr *msg, size_t size, int flags) | |
716 | { | |
717 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
718 | ||
719 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
720 | } | |
721 | ||
89bddce5 | 722 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
723 | size_t size, int flags) |
724 | { | |
725 | struct kiocb iocb; | |
726 | struct sock_iocb siocb; | |
727 | int ret; | |
728 | ||
89bddce5 | 729 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
730 | iocb.private = &siocb; |
731 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
732 | if (-EIOCBQUEUED == ret) | |
733 | ret = wait_on_sync_kiocb(&iocb); | |
734 | return ret; | |
735 | } | |
736 | ||
a2e27255 ACM |
737 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
738 | size_t size, int flags) | |
739 | { | |
740 | struct kiocb iocb; | |
741 | struct sock_iocb siocb; | |
742 | int ret; | |
743 | ||
744 | init_sync_kiocb(&iocb, NULL); | |
745 | iocb.private = &siocb; | |
746 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
747 | if (-EIOCBQUEUED == ret) | |
748 | ret = wait_on_sync_kiocb(&iocb); | |
749 | return ret; | |
750 | } | |
751 | ||
89bddce5 SH |
752 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
753 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
754 | { |
755 | mm_segment_t oldfs = get_fs(); | |
756 | int result; | |
757 | ||
758 | set_fs(KERNEL_DS); | |
759 | /* | |
760 | * the following is safe, since for compiler definitions of kvec and | |
761 | * iovec are identical, yielding the same in-core layout and alignment | |
762 | */ | |
89bddce5 | 763 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
764 | result = sock_recvmsg(sock, msg, size, flags); |
765 | set_fs(oldfs); | |
766 | return result; | |
767 | } | |
768 | ||
769 | static void sock_aio_dtor(struct kiocb *iocb) | |
770 | { | |
771 | kfree(iocb->private); | |
772 | } | |
773 | ||
ce1d4d3e CH |
774 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
775 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 776 | { |
1da177e4 LT |
777 | struct socket *sock; |
778 | int flags; | |
779 | ||
ce1d4d3e CH |
780 | sock = file->private_data; |
781 | ||
782 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; | |
783 | if (more) | |
784 | flags |= MSG_MORE; | |
785 | ||
e6949583 | 786 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 787 | } |
1da177e4 | 788 | |
9c55e01c JA |
789 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
790 | struct pipe_inode_info *pipe, size_t len, | |
791 | unsigned int flags) | |
792 | { | |
793 | struct socket *sock = file->private_data; | |
794 | ||
997b37da RDC |
795 | if (unlikely(!sock->ops->splice_read)) |
796 | return -EINVAL; | |
797 | ||
9c55e01c JA |
798 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
799 | } | |
800 | ||
ce1d4d3e | 801 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 802 | struct sock_iocb *siocb) |
ce1d4d3e CH |
803 | { |
804 | if (!is_sync_kiocb(iocb)) { | |
805 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
806 | if (!siocb) | |
807 | return NULL; | |
1da177e4 LT |
808 | iocb->ki_dtor = sock_aio_dtor; |
809 | } | |
1da177e4 | 810 | |
ce1d4d3e | 811 | siocb->kiocb = iocb; |
ce1d4d3e CH |
812 | iocb->private = siocb; |
813 | return siocb; | |
1da177e4 LT |
814 | } |
815 | ||
ce1d4d3e | 816 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
817 | struct file *file, const struct iovec *iov, |
818 | unsigned long nr_segs) | |
ce1d4d3e CH |
819 | { |
820 | struct socket *sock = file->private_data; | |
821 | size_t size = 0; | |
822 | int i; | |
1da177e4 | 823 | |
89bddce5 SH |
824 | for (i = 0; i < nr_segs; i++) |
825 | size += iov[i].iov_len; | |
1da177e4 | 826 | |
ce1d4d3e CH |
827 | msg->msg_name = NULL; |
828 | msg->msg_namelen = 0; | |
829 | msg->msg_control = NULL; | |
830 | msg->msg_controllen = 0; | |
89bddce5 | 831 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
832 | msg->msg_iovlen = nr_segs; |
833 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
834 | ||
835 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
836 | } | |
837 | ||
027445c3 BP |
838 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
839 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
840 | { |
841 | struct sock_iocb siocb, *x; | |
842 | ||
1da177e4 LT |
843 | if (pos != 0) |
844 | return -ESPIPE; | |
027445c3 BP |
845 | |
846 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
847 | return 0; |
848 | ||
027445c3 BP |
849 | |
850 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
851 | if (!x) |
852 | return -ENOMEM; | |
027445c3 | 853 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
854 | } |
855 | ||
ce1d4d3e | 856 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
857 | struct file *file, const struct iovec *iov, |
858 | unsigned long nr_segs) | |
1da177e4 | 859 | { |
ce1d4d3e CH |
860 | struct socket *sock = file->private_data; |
861 | size_t size = 0; | |
862 | int i; | |
1da177e4 | 863 | |
89bddce5 SH |
864 | for (i = 0; i < nr_segs; i++) |
865 | size += iov[i].iov_len; | |
1da177e4 | 866 | |
ce1d4d3e CH |
867 | msg->msg_name = NULL; |
868 | msg->msg_namelen = 0; | |
869 | msg->msg_control = NULL; | |
870 | msg->msg_controllen = 0; | |
89bddce5 | 871 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
872 | msg->msg_iovlen = nr_segs; |
873 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
874 | if (sock->type == SOCK_SEQPACKET) | |
875 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 876 | |
ce1d4d3e | 877 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
878 | } |
879 | ||
027445c3 BP |
880 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
881 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
882 | { |
883 | struct sock_iocb siocb, *x; | |
1da177e4 | 884 | |
ce1d4d3e CH |
885 | if (pos != 0) |
886 | return -ESPIPE; | |
027445c3 | 887 | |
027445c3 | 888 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
889 | if (!x) |
890 | return -ENOMEM; | |
1da177e4 | 891 | |
027445c3 | 892 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
893 | } |
894 | ||
1da177e4 LT |
895 | /* |
896 | * Atomic setting of ioctl hooks to avoid race | |
897 | * with module unload. | |
898 | */ | |
899 | ||
4a3e2f71 | 900 | static DEFINE_MUTEX(br_ioctl_mutex); |
881d966b | 901 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL; |
1da177e4 | 902 | |
881d966b | 903 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 904 | { |
4a3e2f71 | 905 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 906 | br_ioctl_hook = hook; |
4a3e2f71 | 907 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 | 908 | } |
89bddce5 | 909 | |
1da177e4 LT |
910 | EXPORT_SYMBOL(brioctl_set); |
911 | ||
4a3e2f71 | 912 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 913 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 914 | |
881d966b | 915 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 916 | { |
4a3e2f71 | 917 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 918 | vlan_ioctl_hook = hook; |
4a3e2f71 | 919 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 920 | } |
89bddce5 | 921 | |
1da177e4 LT |
922 | EXPORT_SYMBOL(vlan_ioctl_set); |
923 | ||
4a3e2f71 | 924 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 925 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 926 | |
89bddce5 | 927 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 928 | { |
4a3e2f71 | 929 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 930 | dlci_ioctl_hook = hook; |
4a3e2f71 | 931 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 | 932 | } |
89bddce5 | 933 | |
1da177e4 LT |
934 | EXPORT_SYMBOL(dlci_ioctl_set); |
935 | ||
6b96018b AB |
936 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
937 | unsigned int cmd, unsigned long arg) | |
938 | { | |
939 | int err; | |
940 | void __user *argp = (void __user *)arg; | |
941 | ||
942 | err = sock->ops->ioctl(sock, cmd, arg); | |
943 | ||
944 | /* | |
945 | * If this ioctl is unknown try to hand it down | |
946 | * to the NIC driver. | |
947 | */ | |
948 | if (err == -ENOIOCTLCMD) | |
949 | err = dev_ioctl(net, cmd, argp); | |
950 | ||
951 | return err; | |
952 | } | |
953 | ||
1da177e4 LT |
954 | /* |
955 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
956 | * what to do with it - that's up to the protocol still. | |
957 | */ | |
958 | ||
959 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
960 | { | |
961 | struct socket *sock; | |
881d966b | 962 | struct sock *sk; |
1da177e4 LT |
963 | void __user *argp = (void __user *)arg; |
964 | int pid, err; | |
881d966b | 965 | struct net *net; |
1da177e4 | 966 | |
b69aee04 | 967 | sock = file->private_data; |
881d966b | 968 | sk = sock->sk; |
3b1e0a65 | 969 | net = sock_net(sk); |
1da177e4 | 970 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 971 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 972 | } else |
3d23e349 | 973 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 974 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 975 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 976 | } else |
3d23e349 | 977 | #endif |
89bddce5 | 978 | switch (cmd) { |
1da177e4 LT |
979 | case FIOSETOWN: |
980 | case SIOCSPGRP: | |
981 | err = -EFAULT; | |
982 | if (get_user(pid, (int __user *)argp)) | |
983 | break; | |
984 | err = f_setown(sock->file, pid, 1); | |
985 | break; | |
986 | case FIOGETOWN: | |
987 | case SIOCGPGRP: | |
609d7fa9 | 988 | err = put_user(f_getown(sock->file), |
89bddce5 | 989 | (int __user *)argp); |
1da177e4 LT |
990 | break; |
991 | case SIOCGIFBR: | |
992 | case SIOCSIFBR: | |
993 | case SIOCBRADDBR: | |
994 | case SIOCBRDELBR: | |
995 | err = -ENOPKG; | |
996 | if (!br_ioctl_hook) | |
997 | request_module("bridge"); | |
998 | ||
4a3e2f71 | 999 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1000 | if (br_ioctl_hook) |
881d966b | 1001 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1002 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1003 | break; |
1004 | case SIOCGIFVLAN: | |
1005 | case SIOCSIFVLAN: | |
1006 | err = -ENOPKG; | |
1007 | if (!vlan_ioctl_hook) | |
1008 | request_module("8021q"); | |
1009 | ||
4a3e2f71 | 1010 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1011 | if (vlan_ioctl_hook) |
881d966b | 1012 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1013 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1014 | break; |
1da177e4 LT |
1015 | case SIOCADDDLCI: |
1016 | case SIOCDELDLCI: | |
1017 | err = -ENOPKG; | |
1018 | if (!dlci_ioctl_hook) | |
1019 | request_module("dlci"); | |
1020 | ||
7512cbf6 PE |
1021 | mutex_lock(&dlci_ioctl_mutex); |
1022 | if (dlci_ioctl_hook) | |
1da177e4 | 1023 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1024 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1025 | break; |
1026 | default: | |
6b96018b | 1027 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1028 | break; |
89bddce5 | 1029 | } |
1da177e4 LT |
1030 | return err; |
1031 | } | |
1032 | ||
1033 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1034 | { | |
1035 | int err; | |
1036 | struct socket *sock = NULL; | |
89bddce5 | 1037 | |
1da177e4 LT |
1038 | err = security_socket_create(family, type, protocol, 1); |
1039 | if (err) | |
1040 | goto out; | |
1041 | ||
1042 | sock = sock_alloc(); | |
1043 | if (!sock) { | |
1044 | err = -ENOMEM; | |
1045 | goto out; | |
1046 | } | |
1047 | ||
1da177e4 | 1048 | sock->type = type; |
7420ed23 VY |
1049 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1050 | if (err) | |
1051 | goto out_release; | |
1052 | ||
1da177e4 LT |
1053 | out: |
1054 | *res = sock; | |
1055 | return err; | |
7420ed23 VY |
1056 | out_release: |
1057 | sock_release(sock); | |
1058 | sock = NULL; | |
1059 | goto out; | |
1da177e4 LT |
1060 | } |
1061 | ||
1062 | /* No kernel lock held - perfect */ | |
89bddce5 | 1063 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1064 | { |
1065 | struct socket *sock; | |
1066 | ||
1067 | /* | |
89bddce5 | 1068 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1069 | */ |
b69aee04 | 1070 | sock = file->private_data; |
1da177e4 LT |
1071 | return sock->ops->poll(file, sock, wait); |
1072 | } | |
1073 | ||
89bddce5 | 1074 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1075 | { |
b69aee04 | 1076 | struct socket *sock = file->private_data; |
1da177e4 LT |
1077 | |
1078 | return sock->ops->mmap(file, sock, vma); | |
1079 | } | |
1080 | ||
20380731 | 1081 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1082 | { |
1083 | /* | |
89bddce5 SH |
1084 | * It was possible the inode is NULL we were |
1085 | * closing an unfinished socket. | |
1da177e4 LT |
1086 | */ |
1087 | ||
89bddce5 | 1088 | if (!inode) { |
1da177e4 LT |
1089 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1090 | return 0; | |
1091 | } | |
1da177e4 LT |
1092 | sock_release(SOCKET_I(inode)); |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Update the socket async list | |
1098 | * | |
1099 | * Fasync_list locking strategy. | |
1100 | * | |
1101 | * 1. fasync_list is modified only under process context socket lock | |
1102 | * i.e. under semaphore. | |
1103 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
1104 | * or under socket lock. | |
1105 | * 3. fasync_list can be used from softirq context, so that | |
1106 | * modification under socket lock have to be enhanced with | |
1107 | * write_lock_bh(&sk->sk_callback_lock). | |
1108 | * --ANK (990710) | |
1109 | */ | |
1110 | ||
1111 | static int sock_fasync(int fd, struct file *filp, int on) | |
1112 | { | |
89bddce5 | 1113 | struct fasync_struct *fa, *fna = NULL, **prev; |
1da177e4 LT |
1114 | struct socket *sock; |
1115 | struct sock *sk; | |
1116 | ||
89bddce5 | 1117 | if (on) { |
8b3a7005 | 1118 | fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL); |
89bddce5 | 1119 | if (fna == NULL) |
1da177e4 LT |
1120 | return -ENOMEM; |
1121 | } | |
1122 | ||
b69aee04 | 1123 | sock = filp->private_data; |
1da177e4 | 1124 | |
89bddce5 SH |
1125 | sk = sock->sk; |
1126 | if (sk == NULL) { | |
1da177e4 LT |
1127 | kfree(fna); |
1128 | return -EINVAL; | |
1129 | } | |
1130 | ||
1131 | lock_sock(sk); | |
1132 | ||
76398425 JC |
1133 | spin_lock(&filp->f_lock); |
1134 | if (on) | |
1135 | filp->f_flags |= FASYNC; | |
1136 | else | |
1137 | filp->f_flags &= ~FASYNC; | |
1138 | spin_unlock(&filp->f_lock); | |
1139 | ||
89bddce5 | 1140 | prev = &(sock->fasync_list); |
1da177e4 | 1141 | |
89bddce5 SH |
1142 | for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev) |
1143 | if (fa->fa_file == filp) | |
1da177e4 LT |
1144 | break; |
1145 | ||
89bddce5 SH |
1146 | if (on) { |
1147 | if (fa != NULL) { | |
1da177e4 | 1148 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1149 | fa->fa_fd = fd; |
1da177e4 LT |
1150 | write_unlock_bh(&sk->sk_callback_lock); |
1151 | ||
1152 | kfree(fna); | |
1153 | goto out; | |
1154 | } | |
89bddce5 SH |
1155 | fna->fa_file = filp; |
1156 | fna->fa_fd = fd; | |
1157 | fna->magic = FASYNC_MAGIC; | |
1158 | fna->fa_next = sock->fasync_list; | |
1da177e4 | 1159 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1160 | sock->fasync_list = fna; |
bcdce719 | 1161 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1162 | write_unlock_bh(&sk->sk_callback_lock); |
89bddce5 SH |
1163 | } else { |
1164 | if (fa != NULL) { | |
1da177e4 | 1165 | write_lock_bh(&sk->sk_callback_lock); |
89bddce5 | 1166 | *prev = fa->fa_next; |
bcdce719 ED |
1167 | if (!sock->fasync_list) |
1168 | sock_reset_flag(sk, SOCK_FASYNC); | |
1da177e4 LT |
1169 | write_unlock_bh(&sk->sk_callback_lock); |
1170 | kfree(fa); | |
1171 | } | |
1172 | } | |
1173 | ||
1174 | out: | |
1175 | release_sock(sock->sk); | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | /* This function may be called only under socket lock or callback_lock */ | |
1180 | ||
1181 | int sock_wake_async(struct socket *sock, int how, int band) | |
1182 | { | |
1183 | if (!sock || !sock->fasync_list) | |
1184 | return -1; | |
89bddce5 | 1185 | switch (how) { |
8d8ad9d7 | 1186 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1187 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1188 | break; | |
1189 | goto call_kill; | |
8d8ad9d7 | 1190 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1191 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1192 | break; | |
1193 | /* fall through */ | |
8d8ad9d7 | 1194 | case SOCK_WAKE_IO: |
89bddce5 | 1195 | call_kill: |
1da177e4 LT |
1196 | __kill_fasync(sock->fasync_list, SIGIO, band); |
1197 | break; | |
8d8ad9d7 | 1198 | case SOCK_WAKE_URG: |
1da177e4 LT |
1199 | __kill_fasync(sock->fasync_list, SIGURG, band); |
1200 | } | |
1201 | return 0; | |
1202 | } | |
1203 | ||
1b8d7ae4 | 1204 | static int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1205 | struct socket **res, int kern) |
1da177e4 LT |
1206 | { |
1207 | int err; | |
1208 | struct socket *sock; | |
55737fda | 1209 | const struct net_proto_family *pf; |
1da177e4 LT |
1210 | |
1211 | /* | |
89bddce5 | 1212 | * Check protocol is in range |
1da177e4 LT |
1213 | */ |
1214 | if (family < 0 || family >= NPROTO) | |
1215 | return -EAFNOSUPPORT; | |
1216 | if (type < 0 || type >= SOCK_MAX) | |
1217 | return -EINVAL; | |
1218 | ||
1219 | /* Compatibility. | |
1220 | ||
1221 | This uglymoron is moved from INET layer to here to avoid | |
1222 | deadlock in module load. | |
1223 | */ | |
1224 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1225 | static int warned; |
1da177e4 LT |
1226 | if (!warned) { |
1227 | warned = 1; | |
89bddce5 SH |
1228 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1229 | current->comm); | |
1da177e4 LT |
1230 | } |
1231 | family = PF_PACKET; | |
1232 | } | |
1233 | ||
1234 | err = security_socket_create(family, type, protocol, kern); | |
1235 | if (err) | |
1236 | return err; | |
89bddce5 | 1237 | |
55737fda SH |
1238 | /* |
1239 | * Allocate the socket and allow the family to set things up. if | |
1240 | * the protocol is 0, the family is instructed to select an appropriate | |
1241 | * default. | |
1242 | */ | |
1243 | sock = sock_alloc(); | |
1244 | if (!sock) { | |
1245 | if (net_ratelimit()) | |
1246 | printk(KERN_WARNING "socket: no more sockets\n"); | |
1247 | return -ENFILE; /* Not exactly a match, but its the | |
1248 | closest posix thing */ | |
1249 | } | |
1250 | ||
1251 | sock->type = type; | |
1252 | ||
95a5afca | 1253 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1254 | /* Attempt to load a protocol module if the find failed. |
1255 | * | |
1256 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1257 | * requested real, full-featured networking support upon configuration. |
1258 | * Otherwise module support will break! | |
1259 | */ | |
55737fda | 1260 | if (net_families[family] == NULL) |
89bddce5 | 1261 | request_module("net-pf-%d", family); |
1da177e4 LT |
1262 | #endif |
1263 | ||
55737fda SH |
1264 | rcu_read_lock(); |
1265 | pf = rcu_dereference(net_families[family]); | |
1266 | err = -EAFNOSUPPORT; | |
1267 | if (!pf) | |
1268 | goto out_release; | |
1da177e4 LT |
1269 | |
1270 | /* | |
1271 | * We will call the ->create function, that possibly is in a loadable | |
1272 | * module, so we have to bump that loadable module refcnt first. | |
1273 | */ | |
55737fda | 1274 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1275 | goto out_release; |
1276 | ||
55737fda SH |
1277 | /* Now protected by module ref count */ |
1278 | rcu_read_unlock(); | |
1279 | ||
3f378b68 | 1280 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1281 | if (err < 0) |
1da177e4 | 1282 | goto out_module_put; |
a79af59e | 1283 | |
1da177e4 LT |
1284 | /* |
1285 | * Now to bump the refcnt of the [loadable] module that owns this | |
1286 | * socket at sock_release time we decrement its refcnt. | |
1287 | */ | |
55737fda SH |
1288 | if (!try_module_get(sock->ops->owner)) |
1289 | goto out_module_busy; | |
1290 | ||
1da177e4 LT |
1291 | /* |
1292 | * Now that we're done with the ->create function, the [loadable] | |
1293 | * module can have its refcnt decremented | |
1294 | */ | |
55737fda | 1295 | module_put(pf->owner); |
7420ed23 VY |
1296 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1297 | if (err) | |
3b185525 | 1298 | goto out_sock_release; |
55737fda | 1299 | *res = sock; |
1da177e4 | 1300 | |
55737fda SH |
1301 | return 0; |
1302 | ||
1303 | out_module_busy: | |
1304 | err = -EAFNOSUPPORT; | |
1da177e4 | 1305 | out_module_put: |
55737fda SH |
1306 | sock->ops = NULL; |
1307 | module_put(pf->owner); | |
1308 | out_sock_release: | |
1da177e4 | 1309 | sock_release(sock); |
55737fda SH |
1310 | return err; |
1311 | ||
1312 | out_release: | |
1313 | rcu_read_unlock(); | |
1314 | goto out_sock_release; | |
1da177e4 LT |
1315 | } |
1316 | ||
1317 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1318 | { | |
1b8d7ae4 | 1319 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1323 | { | |
1b8d7ae4 | 1324 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 LT |
1325 | } |
1326 | ||
3e0fa65f | 1327 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1328 | { |
1329 | int retval; | |
1330 | struct socket *sock; | |
a677a039 UD |
1331 | int flags; |
1332 | ||
e38b36f3 UD |
1333 | /* Check the SOCK_* constants for consistency. */ |
1334 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1335 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1336 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1337 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1338 | ||
a677a039 | 1339 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1340 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1341 | return -EINVAL; |
1342 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1343 | |
aaca0bdc UD |
1344 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1345 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1346 | ||
1da177e4 LT |
1347 | retval = sock_create(family, type, protocol, &sock); |
1348 | if (retval < 0) | |
1349 | goto out; | |
1350 | ||
77d27200 | 1351 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1352 | if (retval < 0) |
1353 | goto out_release; | |
1354 | ||
1355 | out: | |
1356 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1357 | return retval; | |
1358 | ||
1359 | out_release: | |
1360 | sock_release(sock); | |
1361 | return retval; | |
1362 | } | |
1363 | ||
1364 | /* | |
1365 | * Create a pair of connected sockets. | |
1366 | */ | |
1367 | ||
3e0fa65f HC |
1368 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1369 | int __user *, usockvec) | |
1da177e4 LT |
1370 | { |
1371 | struct socket *sock1, *sock2; | |
1372 | int fd1, fd2, err; | |
db349509 | 1373 | struct file *newfile1, *newfile2; |
a677a039 UD |
1374 | int flags; |
1375 | ||
1376 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1377 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1378 | return -EINVAL; |
1379 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1380 | |
aaca0bdc UD |
1381 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1382 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1383 | ||
1da177e4 LT |
1384 | /* |
1385 | * Obtain the first socket and check if the underlying protocol | |
1386 | * supports the socketpair call. | |
1387 | */ | |
1388 | ||
1389 | err = sock_create(family, type, protocol, &sock1); | |
1390 | if (err < 0) | |
1391 | goto out; | |
1392 | ||
1393 | err = sock_create(family, type, protocol, &sock2); | |
1394 | if (err < 0) | |
1395 | goto out_release_1; | |
1396 | ||
1397 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1398 | if (err < 0) |
1da177e4 LT |
1399 | goto out_release_both; |
1400 | ||
a677a039 | 1401 | fd1 = sock_alloc_fd(&newfile1, flags & O_CLOEXEC); |
bf3c23d1 DM |
1402 | if (unlikely(fd1 < 0)) { |
1403 | err = fd1; | |
db349509 | 1404 | goto out_release_both; |
bf3c23d1 | 1405 | } |
1da177e4 | 1406 | |
a677a039 | 1407 | fd2 = sock_alloc_fd(&newfile2, flags & O_CLOEXEC); |
db349509 | 1408 | if (unlikely(fd2 < 0)) { |
bf3c23d1 | 1409 | err = fd2; |
db349509 AV |
1410 | put_filp(newfile1); |
1411 | put_unused_fd(fd1); | |
1da177e4 | 1412 | goto out_release_both; |
db349509 | 1413 | } |
1da177e4 | 1414 | |
77d27200 | 1415 | err = sock_attach_fd(sock1, newfile1, flags & O_NONBLOCK); |
db349509 AV |
1416 | if (unlikely(err < 0)) { |
1417 | goto out_fd2; | |
1418 | } | |
1419 | ||
77d27200 | 1420 | err = sock_attach_fd(sock2, newfile2, flags & O_NONBLOCK); |
db349509 AV |
1421 | if (unlikely(err < 0)) { |
1422 | fput(newfile1); | |
1423 | goto out_fd1; | |
1424 | } | |
1425 | ||
157cf649 | 1426 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1427 | fd_install(fd1, newfile1); |
1428 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1429 | /* fd1 and fd2 may be already another descriptors. |
1430 | * Not kernel problem. | |
1431 | */ | |
1432 | ||
89bddce5 | 1433 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1434 | if (!err) |
1435 | err = put_user(fd2, &usockvec[1]); | |
1436 | if (!err) | |
1437 | return 0; | |
1438 | ||
1439 | sys_close(fd2); | |
1440 | sys_close(fd1); | |
1441 | return err; | |
1442 | ||
1da177e4 | 1443 | out_release_both: |
89bddce5 | 1444 | sock_release(sock2); |
1da177e4 | 1445 | out_release_1: |
89bddce5 | 1446 | sock_release(sock1); |
1da177e4 LT |
1447 | out: |
1448 | return err; | |
db349509 AV |
1449 | |
1450 | out_fd2: | |
1451 | put_filp(newfile1); | |
1452 | sock_release(sock1); | |
1453 | out_fd1: | |
1454 | put_filp(newfile2); | |
1455 | sock_release(sock2); | |
db349509 AV |
1456 | put_unused_fd(fd1); |
1457 | put_unused_fd(fd2); | |
1458 | goto out; | |
1da177e4 LT |
1459 | } |
1460 | ||
1da177e4 LT |
1461 | /* |
1462 | * Bind a name to a socket. Nothing much to do here since it's | |
1463 | * the protocol's responsibility to handle the local address. | |
1464 | * | |
1465 | * We move the socket address to kernel space before we call | |
1466 | * the protocol layer (having also checked the address is ok). | |
1467 | */ | |
1468 | ||
20f37034 | 1469 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1470 | { |
1471 | struct socket *sock; | |
230b1839 | 1472 | struct sockaddr_storage address; |
6cb153ca | 1473 | int err, fput_needed; |
1da177e4 | 1474 | |
89bddce5 | 1475 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1476 | if (sock) { |
230b1839 | 1477 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
89bddce5 SH |
1478 | if (err >= 0) { |
1479 | err = security_socket_bind(sock, | |
230b1839 | 1480 | (struct sockaddr *)&address, |
89bddce5 | 1481 | addrlen); |
6cb153ca BL |
1482 | if (!err) |
1483 | err = sock->ops->bind(sock, | |
89bddce5 | 1484 | (struct sockaddr *) |
230b1839 | 1485 | &address, addrlen); |
1da177e4 | 1486 | } |
6cb153ca | 1487 | fput_light(sock->file, fput_needed); |
89bddce5 | 1488 | } |
1da177e4 LT |
1489 | return err; |
1490 | } | |
1491 | ||
1da177e4 LT |
1492 | /* |
1493 | * Perform a listen. Basically, we allow the protocol to do anything | |
1494 | * necessary for a listen, and if that works, we mark the socket as | |
1495 | * ready for listening. | |
1496 | */ | |
1497 | ||
3e0fa65f | 1498 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1499 | { |
1500 | struct socket *sock; | |
6cb153ca | 1501 | int err, fput_needed; |
b8e1f9b5 | 1502 | int somaxconn; |
89bddce5 SH |
1503 | |
1504 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1505 | if (sock) { | |
8efa6e93 | 1506 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
b8e1f9b5 PE |
1507 | if ((unsigned)backlog > somaxconn) |
1508 | backlog = somaxconn; | |
1da177e4 LT |
1509 | |
1510 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1511 | if (!err) |
1512 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1513 | |
6cb153ca | 1514 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1515 | } |
1516 | return err; | |
1517 | } | |
1518 | ||
1da177e4 LT |
1519 | /* |
1520 | * For accept, we attempt to create a new socket, set up the link | |
1521 | * with the client, wake up the client, then return the new | |
1522 | * connected fd. We collect the address of the connector in kernel | |
1523 | * space and move it to user at the very end. This is unclean because | |
1524 | * we open the socket then return an error. | |
1525 | * | |
1526 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1527 | * status to recvmsg. We need to add that support in a way thats | |
1528 | * clean when we restucture accept also. | |
1529 | */ | |
1530 | ||
20f37034 HC |
1531 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1532 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1533 | { |
1534 | struct socket *sock, *newsock; | |
39d8c1b6 | 1535 | struct file *newfile; |
6cb153ca | 1536 | int err, len, newfd, fput_needed; |
230b1839 | 1537 | struct sockaddr_storage address; |
1da177e4 | 1538 | |
77d27200 | 1539 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1540 | return -EINVAL; |
1541 | ||
1542 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1543 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1544 | ||
6cb153ca | 1545 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1546 | if (!sock) |
1547 | goto out; | |
1548 | ||
1549 | err = -ENFILE; | |
89bddce5 | 1550 | if (!(newsock = sock_alloc())) |
1da177e4 LT |
1551 | goto out_put; |
1552 | ||
1553 | newsock->type = sock->type; | |
1554 | newsock->ops = sock->ops; | |
1555 | ||
1da177e4 LT |
1556 | /* |
1557 | * We don't need try_module_get here, as the listening socket (sock) | |
1558 | * has the protocol module (sock->ops->owner) held. | |
1559 | */ | |
1560 | __module_get(newsock->ops->owner); | |
1561 | ||
aaca0bdc | 1562 | newfd = sock_alloc_fd(&newfile, flags & O_CLOEXEC); |
39d8c1b6 DM |
1563 | if (unlikely(newfd < 0)) { |
1564 | err = newfd; | |
9a1875e6 DM |
1565 | sock_release(newsock); |
1566 | goto out_put; | |
39d8c1b6 DM |
1567 | } |
1568 | ||
77d27200 | 1569 | err = sock_attach_fd(newsock, newfile, flags & O_NONBLOCK); |
39d8c1b6 | 1570 | if (err < 0) |
79f4f642 | 1571 | goto out_fd_simple; |
39d8c1b6 | 1572 | |
a79af59e FF |
1573 | err = security_socket_accept(sock, newsock); |
1574 | if (err) | |
39d8c1b6 | 1575 | goto out_fd; |
a79af59e | 1576 | |
1da177e4 LT |
1577 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1578 | if (err < 0) | |
39d8c1b6 | 1579 | goto out_fd; |
1da177e4 LT |
1580 | |
1581 | if (upeer_sockaddr) { | |
230b1839 | 1582 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1583 | &len, 2) < 0) { |
1da177e4 | 1584 | err = -ECONNABORTED; |
39d8c1b6 | 1585 | goto out_fd; |
1da177e4 | 1586 | } |
230b1839 YH |
1587 | err = move_addr_to_user((struct sockaddr *)&address, |
1588 | len, upeer_sockaddr, upeer_addrlen); | |
1da177e4 | 1589 | if (err < 0) |
39d8c1b6 | 1590 | goto out_fd; |
1da177e4 LT |
1591 | } |
1592 | ||
1593 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1594 | ||
39d8c1b6 DM |
1595 | fd_install(newfd, newfile); |
1596 | err = newfd; | |
1da177e4 | 1597 | |
1da177e4 | 1598 | out_put: |
6cb153ca | 1599 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1600 | out: |
1601 | return err; | |
79f4f642 AD |
1602 | out_fd_simple: |
1603 | sock_release(newsock); | |
1604 | put_filp(newfile); | |
1605 | put_unused_fd(newfd); | |
1606 | goto out_put; | |
39d8c1b6 | 1607 | out_fd: |
9606a216 | 1608 | fput(newfile); |
39d8c1b6 | 1609 | put_unused_fd(newfd); |
1da177e4 LT |
1610 | goto out_put; |
1611 | } | |
1612 | ||
20f37034 HC |
1613 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1614 | int __user *, upeer_addrlen) | |
aaca0bdc | 1615 | { |
de11defe | 1616 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1617 | } |
1618 | ||
1da177e4 LT |
1619 | /* |
1620 | * Attempt to connect to a socket with the server address. The address | |
1621 | * is in user space so we verify it is OK and move it to kernel space. | |
1622 | * | |
1623 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1624 | * break bindings | |
1625 | * | |
1626 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1627 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1628 | * include the -EINPROGRESS status for such sockets. | |
1629 | */ | |
1630 | ||
20f37034 HC |
1631 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1632 | int, addrlen) | |
1da177e4 LT |
1633 | { |
1634 | struct socket *sock; | |
230b1839 | 1635 | struct sockaddr_storage address; |
6cb153ca | 1636 | int err, fput_needed; |
1da177e4 | 1637 | |
6cb153ca | 1638 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1639 | if (!sock) |
1640 | goto out; | |
230b1839 | 1641 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
1da177e4 LT |
1642 | if (err < 0) |
1643 | goto out_put; | |
1644 | ||
89bddce5 | 1645 | err = |
230b1839 | 1646 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1647 | if (err) |
1648 | goto out_put; | |
1649 | ||
230b1839 | 1650 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1651 | sock->file->f_flags); |
1652 | out_put: | |
6cb153ca | 1653 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1654 | out: |
1655 | return err; | |
1656 | } | |
1657 | ||
1658 | /* | |
1659 | * Get the local address ('name') of a socket object. Move the obtained | |
1660 | * name to user space. | |
1661 | */ | |
1662 | ||
20f37034 HC |
1663 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1664 | int __user *, usockaddr_len) | |
1da177e4 LT |
1665 | { |
1666 | struct socket *sock; | |
230b1839 | 1667 | struct sockaddr_storage address; |
6cb153ca | 1668 | int len, err, fput_needed; |
89bddce5 | 1669 | |
6cb153ca | 1670 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1671 | if (!sock) |
1672 | goto out; | |
1673 | ||
1674 | err = security_socket_getsockname(sock); | |
1675 | if (err) | |
1676 | goto out_put; | |
1677 | ||
230b1839 | 1678 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1679 | if (err) |
1680 | goto out_put; | |
230b1839 | 1681 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1682 | |
1683 | out_put: | |
6cb153ca | 1684 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1685 | out: |
1686 | return err; | |
1687 | } | |
1688 | ||
1689 | /* | |
1690 | * Get the remote address ('name') of a socket object. Move the obtained | |
1691 | * name to user space. | |
1692 | */ | |
1693 | ||
20f37034 HC |
1694 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1695 | int __user *, usockaddr_len) | |
1da177e4 LT |
1696 | { |
1697 | struct socket *sock; | |
230b1839 | 1698 | struct sockaddr_storage address; |
6cb153ca | 1699 | int len, err, fput_needed; |
1da177e4 | 1700 | |
89bddce5 SH |
1701 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1702 | if (sock != NULL) { | |
1da177e4 LT |
1703 | err = security_socket_getpeername(sock); |
1704 | if (err) { | |
6cb153ca | 1705 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1706 | return err; |
1707 | } | |
1708 | ||
89bddce5 | 1709 | err = |
230b1839 | 1710 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1711 | 1); |
1da177e4 | 1712 | if (!err) |
230b1839 | 1713 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
89bddce5 | 1714 | usockaddr_len); |
6cb153ca | 1715 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1716 | } |
1717 | return err; | |
1718 | } | |
1719 | ||
1720 | /* | |
1721 | * Send a datagram to a given address. We move the address into kernel | |
1722 | * space and check the user space data area is readable before invoking | |
1723 | * the protocol. | |
1724 | */ | |
1725 | ||
3e0fa65f HC |
1726 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
1727 | unsigned, flags, struct sockaddr __user *, addr, | |
1728 | int, addr_len) | |
1da177e4 LT |
1729 | { |
1730 | struct socket *sock; | |
230b1839 | 1731 | struct sockaddr_storage address; |
1da177e4 LT |
1732 | int err; |
1733 | struct msghdr msg; | |
1734 | struct iovec iov; | |
6cb153ca | 1735 | int fput_needed; |
6cb153ca | 1736 | |
de0fa95c PE |
1737 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1738 | if (!sock) | |
4387ff75 | 1739 | goto out; |
6cb153ca | 1740 | |
89bddce5 SH |
1741 | iov.iov_base = buff; |
1742 | iov.iov_len = len; | |
1743 | msg.msg_name = NULL; | |
1744 | msg.msg_iov = &iov; | |
1745 | msg.msg_iovlen = 1; | |
1746 | msg.msg_control = NULL; | |
1747 | msg.msg_controllen = 0; | |
1748 | msg.msg_namelen = 0; | |
6cb153ca | 1749 | if (addr) { |
230b1839 | 1750 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
1da177e4 LT |
1751 | if (err < 0) |
1752 | goto out_put; | |
230b1839 | 1753 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1754 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1755 | } |
1756 | if (sock->file->f_flags & O_NONBLOCK) | |
1757 | flags |= MSG_DONTWAIT; | |
1758 | msg.msg_flags = flags; | |
1759 | err = sock_sendmsg(sock, &msg, len); | |
1760 | ||
89bddce5 | 1761 | out_put: |
de0fa95c | 1762 | fput_light(sock->file, fput_needed); |
4387ff75 | 1763 | out: |
1da177e4 LT |
1764 | return err; |
1765 | } | |
1766 | ||
1767 | /* | |
89bddce5 | 1768 | * Send a datagram down a socket. |
1da177e4 LT |
1769 | */ |
1770 | ||
3e0fa65f HC |
1771 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
1772 | unsigned, flags) | |
1da177e4 LT |
1773 | { |
1774 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1775 | } | |
1776 | ||
1777 | /* | |
89bddce5 | 1778 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1779 | * sender. We verify the buffers are writable and if needed move the |
1780 | * sender address from kernel to user space. | |
1781 | */ | |
1782 | ||
3e0fa65f HC |
1783 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
1784 | unsigned, flags, struct sockaddr __user *, addr, | |
1785 | int __user *, addr_len) | |
1da177e4 LT |
1786 | { |
1787 | struct socket *sock; | |
1788 | struct iovec iov; | |
1789 | struct msghdr msg; | |
230b1839 | 1790 | struct sockaddr_storage address; |
89bddce5 | 1791 | int err, err2; |
6cb153ca BL |
1792 | int fput_needed; |
1793 | ||
de0fa95c | 1794 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1795 | if (!sock) |
de0fa95c | 1796 | goto out; |
1da177e4 | 1797 | |
89bddce5 SH |
1798 | msg.msg_control = NULL; |
1799 | msg.msg_controllen = 0; | |
1800 | msg.msg_iovlen = 1; | |
1801 | msg.msg_iov = &iov; | |
1802 | iov.iov_len = size; | |
1803 | iov.iov_base = ubuf; | |
230b1839 YH |
1804 | msg.msg_name = (struct sockaddr *)&address; |
1805 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1806 | if (sock->file->f_flags & O_NONBLOCK) |
1807 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1808 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1809 | |
89bddce5 | 1810 | if (err >= 0 && addr != NULL) { |
230b1839 YH |
1811 | err2 = move_addr_to_user((struct sockaddr *)&address, |
1812 | msg.msg_namelen, addr, addr_len); | |
89bddce5 SH |
1813 | if (err2 < 0) |
1814 | err = err2; | |
1da177e4 | 1815 | } |
de0fa95c PE |
1816 | |
1817 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1818 | out: |
1da177e4 LT |
1819 | return err; |
1820 | } | |
1821 | ||
1822 | /* | |
89bddce5 | 1823 | * Receive a datagram from a socket. |
1da177e4 LT |
1824 | */ |
1825 | ||
89bddce5 SH |
1826 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
1827 | unsigned flags) | |
1da177e4 LT |
1828 | { |
1829 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1830 | } | |
1831 | ||
1832 | /* | |
1833 | * Set a socket option. Because we don't know the option lengths we have | |
1834 | * to pass the user mode parameter for the protocols to sort out. | |
1835 | */ | |
1836 | ||
20f37034 HC |
1837 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1838 | char __user *, optval, int, optlen) | |
1da177e4 | 1839 | { |
6cb153ca | 1840 | int err, fput_needed; |
1da177e4 LT |
1841 | struct socket *sock; |
1842 | ||
1843 | if (optlen < 0) | |
1844 | return -EINVAL; | |
89bddce5 SH |
1845 | |
1846 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1847 | if (sock != NULL) { | |
1848 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1849 | if (err) |
1850 | goto out_put; | |
1da177e4 LT |
1851 | |
1852 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1853 | err = |
1854 | sock_setsockopt(sock, level, optname, optval, | |
1855 | optlen); | |
1da177e4 | 1856 | else |
89bddce5 SH |
1857 | err = |
1858 | sock->ops->setsockopt(sock, level, optname, optval, | |
1859 | optlen); | |
6cb153ca BL |
1860 | out_put: |
1861 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1862 | } |
1863 | return err; | |
1864 | } | |
1865 | ||
1866 | /* | |
1867 | * Get a socket option. Because we don't know the option lengths we have | |
1868 | * to pass a user mode parameter for the protocols to sort out. | |
1869 | */ | |
1870 | ||
20f37034 HC |
1871 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1872 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1873 | { |
6cb153ca | 1874 | int err, fput_needed; |
1da177e4 LT |
1875 | struct socket *sock; |
1876 | ||
89bddce5 SH |
1877 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1878 | if (sock != NULL) { | |
6cb153ca BL |
1879 | err = security_socket_getsockopt(sock, level, optname); |
1880 | if (err) | |
1881 | goto out_put; | |
1da177e4 LT |
1882 | |
1883 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1884 | err = |
1885 | sock_getsockopt(sock, level, optname, optval, | |
1886 | optlen); | |
1da177e4 | 1887 | else |
89bddce5 SH |
1888 | err = |
1889 | sock->ops->getsockopt(sock, level, optname, optval, | |
1890 | optlen); | |
6cb153ca BL |
1891 | out_put: |
1892 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1893 | } |
1894 | return err; | |
1895 | } | |
1896 | ||
1da177e4 LT |
1897 | /* |
1898 | * Shutdown a socket. | |
1899 | */ | |
1900 | ||
754fe8d2 | 1901 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1902 | { |
6cb153ca | 1903 | int err, fput_needed; |
1da177e4 LT |
1904 | struct socket *sock; |
1905 | ||
89bddce5 SH |
1906 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1907 | if (sock != NULL) { | |
1da177e4 | 1908 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1909 | if (!err) |
1910 | err = sock->ops->shutdown(sock, how); | |
1911 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1912 | } |
1913 | return err; | |
1914 | } | |
1915 | ||
89bddce5 | 1916 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1917 | * fields which are the same type (int / unsigned) on our platforms. |
1918 | */ | |
1919 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1920 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1921 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1922 | ||
1da177e4 LT |
1923 | /* |
1924 | * BSD sendmsg interface | |
1925 | */ | |
1926 | ||
3e0fa65f | 1927 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
1da177e4 | 1928 | { |
89bddce5 SH |
1929 | struct compat_msghdr __user *msg_compat = |
1930 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1931 | struct socket *sock; |
230b1839 | 1932 | struct sockaddr_storage address; |
1da177e4 | 1933 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1934 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1935 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1936 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 LT |
1937 | unsigned char *ctl_buf = ctl; |
1938 | struct msghdr msg_sys; | |
1939 | int err, ctl_len, iov_size, total_len; | |
6cb153ca | 1940 | int fput_needed; |
89bddce5 | 1941 | |
1da177e4 LT |
1942 | err = -EFAULT; |
1943 | if (MSG_CMSG_COMPAT & flags) { | |
1944 | if (get_compat_msghdr(&msg_sys, msg_compat)) | |
1945 | return -EFAULT; | |
89bddce5 SH |
1946 | } |
1947 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) | |
1da177e4 LT |
1948 | return -EFAULT; |
1949 | ||
6cb153ca | 1950 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
89bddce5 | 1951 | if (!sock) |
1da177e4 LT |
1952 | goto out; |
1953 | ||
1954 | /* do not move before msg_sys is valid */ | |
1955 | err = -EMSGSIZE; | |
1956 | if (msg_sys.msg_iovlen > UIO_MAXIOV) | |
1957 | goto out_put; | |
1958 | ||
89bddce5 | 1959 | /* Check whether to allocate the iovec area */ |
1da177e4 LT |
1960 | err = -ENOMEM; |
1961 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); | |
1962 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { | |
1963 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); | |
1964 | if (!iov) | |
1965 | goto out_put; | |
1966 | } | |
1967 | ||
1968 | /* This will also move the address data into kernel space */ | |
1969 | if (MSG_CMSG_COMPAT & flags) { | |
230b1839 YH |
1970 | err = verify_compat_iovec(&msg_sys, iov, |
1971 | (struct sockaddr *)&address, | |
1972 | VERIFY_READ); | |
1da177e4 | 1973 | } else |
230b1839 YH |
1974 | err = verify_iovec(&msg_sys, iov, |
1975 | (struct sockaddr *)&address, | |
1976 | VERIFY_READ); | |
89bddce5 | 1977 | if (err < 0) |
1da177e4 LT |
1978 | goto out_freeiov; |
1979 | total_len = err; | |
1980 | ||
1981 | err = -ENOBUFS; | |
1982 | ||
1983 | if (msg_sys.msg_controllen > INT_MAX) | |
1984 | goto out_freeiov; | |
89bddce5 | 1985 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1986 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 SH |
1987 | err = |
1988 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, | |
1989 | sizeof(ctl)); | |
1da177e4 LT |
1990 | if (err) |
1991 | goto out_freeiov; | |
1992 | ctl_buf = msg_sys.msg_control; | |
8920e8f9 | 1993 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1994 | } else if (ctl_len) { |
89bddce5 | 1995 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1996 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1997 | if (ctl_buf == NULL) |
1da177e4 LT |
1998 | goto out_freeiov; |
1999 | } | |
2000 | err = -EFAULT; | |
2001 | /* | |
2002 | * Careful! Before this, msg_sys.msg_control contains a user pointer. | |
2003 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted | |
2004 | * checking falls down on this. | |
2005 | */ | |
89bddce5 SH |
2006 | if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, |
2007 | ctl_len)) | |
1da177e4 LT |
2008 | goto out_freectl; |
2009 | msg_sys.msg_control = ctl_buf; | |
2010 | } | |
2011 | msg_sys.msg_flags = flags; | |
2012 | ||
2013 | if (sock->file->f_flags & O_NONBLOCK) | |
2014 | msg_sys.msg_flags |= MSG_DONTWAIT; | |
2015 | err = sock_sendmsg(sock, &msg_sys, total_len); | |
2016 | ||
2017 | out_freectl: | |
89bddce5 | 2018 | if (ctl_buf != ctl) |
1da177e4 LT |
2019 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2020 | out_freeiov: | |
2021 | if (iov != iovstack) | |
2022 | sock_kfree_s(sock->sk, iov, iov_size); | |
2023 | out_put: | |
6cb153ca | 2024 | fput_light(sock->file, fput_needed); |
89bddce5 | 2025 | out: |
1da177e4 LT |
2026 | return err; |
2027 | } | |
2028 | ||
a2e27255 ACM |
2029 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
2030 | struct msghdr *msg_sys, unsigned flags, int nosec) | |
1da177e4 | 2031 | { |
89bddce5 SH |
2032 | struct compat_msghdr __user *msg_compat = |
2033 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2034 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2035 | struct iovec *iov = iovstack; |
1da177e4 LT |
2036 | unsigned long cmsg_ptr; |
2037 | int err, iov_size, total_len, len; | |
2038 | ||
2039 | /* kernel mode address */ | |
230b1839 | 2040 | struct sockaddr_storage addr; |
1da177e4 LT |
2041 | |
2042 | /* user mode address pointers */ | |
2043 | struct sockaddr __user *uaddr; | |
2044 | int __user *uaddr_len; | |
89bddce5 | 2045 | |
1da177e4 | 2046 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2047 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2048 | return -EFAULT; |
89bddce5 | 2049 | } |
a2e27255 | 2050 | else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 2051 | return -EFAULT; |
1da177e4 | 2052 | |
1da177e4 | 2053 | err = -EMSGSIZE; |
a2e27255 ACM |
2054 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
2055 | goto out; | |
89bddce5 SH |
2056 | |
2057 | /* Check whether to allocate the iovec area */ | |
1da177e4 | 2058 | err = -ENOMEM; |
a2e27255 ACM |
2059 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
2060 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { | |
1da177e4 LT |
2061 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
2062 | if (!iov) | |
a2e27255 | 2063 | goto out; |
1da177e4 LT |
2064 | } |
2065 | ||
2066 | /* | |
89bddce5 SH |
2067 | * Save the user-mode address (verify_iovec will change the |
2068 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2069 | */ |
89bddce5 | 2070 | |
a2e27255 | 2071 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2072 | uaddr_len = COMPAT_NAMELEN(msg); |
2073 | if (MSG_CMSG_COMPAT & flags) { | |
a2e27255 | 2074 | err = verify_compat_iovec(msg_sys, iov, |
230b1839 YH |
2075 | (struct sockaddr *)&addr, |
2076 | VERIFY_WRITE); | |
1da177e4 | 2077 | } else |
a2e27255 | 2078 | err = verify_iovec(msg_sys, iov, |
230b1839 YH |
2079 | (struct sockaddr *)&addr, |
2080 | VERIFY_WRITE); | |
1da177e4 LT |
2081 | if (err < 0) |
2082 | goto out_freeiov; | |
89bddce5 | 2083 | total_len = err; |
1da177e4 | 2084 | |
a2e27255 ACM |
2085 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2086 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2087 | |
1da177e4 LT |
2088 | if (sock->file->f_flags & O_NONBLOCK) |
2089 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2090 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2091 | total_len, flags); | |
1da177e4 LT |
2092 | if (err < 0) |
2093 | goto out_freeiov; | |
2094 | len = err; | |
2095 | ||
2096 | if (uaddr != NULL) { | |
230b1839 | 2097 | err = move_addr_to_user((struct sockaddr *)&addr, |
a2e27255 | 2098 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2099 | uaddr_len); |
1da177e4 LT |
2100 | if (err < 0) |
2101 | goto out_freeiov; | |
2102 | } | |
a2e27255 | 2103 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2104 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2105 | if (err) |
2106 | goto out_freeiov; | |
2107 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2108 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2109 | &msg_compat->msg_controllen); |
2110 | else | |
a2e27255 | 2111 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2112 | &msg->msg_controllen); |
2113 | if (err) | |
2114 | goto out_freeiov; | |
2115 | err = len; | |
2116 | ||
2117 | out_freeiov: | |
2118 | if (iov != iovstack) | |
2119 | sock_kfree_s(sock->sk, iov, iov_size); | |
a2e27255 ACM |
2120 | out: |
2121 | return err; | |
2122 | } | |
2123 | ||
2124 | /* | |
2125 | * BSD recvmsg interface | |
2126 | */ | |
2127 | ||
2128 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2129 | unsigned int, flags) | |
2130 | { | |
2131 | int fput_needed, err; | |
2132 | struct msghdr msg_sys; | |
2133 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2134 | ||
2135 | if (!sock) | |
2136 | goto out; | |
2137 | ||
2138 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2139 | ||
6cb153ca | 2140 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2141 | out: |
2142 | return err; | |
2143 | } | |
2144 | ||
a2e27255 ACM |
2145 | /* |
2146 | * Linux recvmmsg interface | |
2147 | */ | |
2148 | ||
2149 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2150 | unsigned int flags, struct timespec *timeout) | |
2151 | { | |
2152 | int fput_needed, err, datagrams; | |
2153 | struct socket *sock; | |
2154 | struct mmsghdr __user *entry; | |
2155 | struct msghdr msg_sys; | |
2156 | struct timespec end_time; | |
2157 | ||
2158 | if (timeout && | |
2159 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2160 | timeout->tv_nsec)) | |
2161 | return -EINVAL; | |
2162 | ||
2163 | datagrams = 0; | |
2164 | ||
2165 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2166 | if (!sock) | |
2167 | return err; | |
2168 | ||
2169 | err = sock_error(sock->sk); | |
2170 | if (err) | |
2171 | goto out_put; | |
2172 | ||
2173 | entry = mmsg; | |
2174 | ||
2175 | while (datagrams < vlen) { | |
2176 | /* | |
2177 | * No need to ask LSM for more than the first datagram. | |
2178 | */ | |
2179 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
2180 | &msg_sys, flags, datagrams); | |
2181 | if (err < 0) | |
2182 | break; | |
2183 | err = put_user(err, &entry->msg_len); | |
2184 | if (err) | |
2185 | break; | |
2186 | ++entry; | |
2187 | ++datagrams; | |
2188 | ||
2189 | if (timeout) { | |
2190 | ktime_get_ts(timeout); | |
2191 | *timeout = timespec_sub(end_time, *timeout); | |
2192 | if (timeout->tv_sec < 0) { | |
2193 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2194 | break; | |
2195 | } | |
2196 | ||
2197 | /* Timeout, return less than vlen datagrams */ | |
2198 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2199 | break; | |
2200 | } | |
2201 | ||
2202 | /* Out of band data, return right away */ | |
2203 | if (msg_sys.msg_flags & MSG_OOB) | |
2204 | break; | |
2205 | } | |
2206 | ||
2207 | out_put: | |
2208 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2209 | |
a2e27255 ACM |
2210 | if (err == 0) |
2211 | return datagrams; | |
2212 | ||
2213 | if (datagrams != 0) { | |
2214 | /* | |
2215 | * We may return less entries than requested (vlen) if the | |
2216 | * sock is non block and there aren't enough datagrams... | |
2217 | */ | |
2218 | if (err != -EAGAIN) { | |
2219 | /* | |
2220 | * ... or if recvmsg returns an error after we | |
2221 | * received some datagrams, where we record the | |
2222 | * error to return on the next call or if the | |
2223 | * app asks about it using getsockopt(SO_ERROR). | |
2224 | */ | |
2225 | sock->sk->sk_err = -err; | |
2226 | } | |
2227 | ||
2228 | return datagrams; | |
2229 | } | |
2230 | ||
2231 | return err; | |
2232 | } | |
2233 | ||
2234 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2235 | unsigned int, vlen, unsigned int, flags, | |
2236 | struct timespec __user *, timeout) | |
2237 | { | |
2238 | int datagrams; | |
2239 | struct timespec timeout_sys; | |
2240 | ||
2241 | if (!timeout) | |
2242 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2243 | ||
2244 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2245 | return -EFAULT; | |
2246 | ||
2247 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2248 | ||
2249 | if (datagrams > 0 && | |
2250 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2251 | datagrams = -EFAULT; | |
2252 | ||
2253 | return datagrams; | |
2254 | } | |
2255 | ||
2256 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2257 | /* Argument list sizes for sys_socketcall */ |
2258 | #define AL(x) ((x) * sizeof(unsigned long)) | |
a2e27255 | 2259 | static const unsigned char nargs[20] = { |
89bddce5 SH |
2260 | AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
2261 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), | |
aaca0bdc | 2262 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
a2e27255 | 2263 | AL(4),AL(5) |
89bddce5 SH |
2264 | }; |
2265 | ||
1da177e4 LT |
2266 | #undef AL |
2267 | ||
2268 | /* | |
89bddce5 | 2269 | * System call vectors. |
1da177e4 LT |
2270 | * |
2271 | * Argument checking cleaned up. Saved 20% in size. | |
2272 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2273 | * it is set by the callees. |
1da177e4 LT |
2274 | */ |
2275 | ||
3e0fa65f | 2276 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2277 | { |
2278 | unsigned long a[6]; | |
89bddce5 | 2279 | unsigned long a0, a1; |
1da177e4 | 2280 | int err; |
47379052 | 2281 | unsigned int len; |
1da177e4 | 2282 | |
a2e27255 | 2283 | if (call < 1 || call > SYS_RECVMMSG) |
1da177e4 LT |
2284 | return -EINVAL; |
2285 | ||
47379052 AV |
2286 | len = nargs[call]; |
2287 | if (len > sizeof(a)) | |
2288 | return -EINVAL; | |
2289 | ||
1da177e4 | 2290 | /* copy_from_user should be SMP safe. */ |
47379052 | 2291 | if (copy_from_user(a, args, len)) |
1da177e4 | 2292 | return -EFAULT; |
3ec3b2fb | 2293 | |
f3298dc4 | 2294 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2295 | |
89bddce5 SH |
2296 | a0 = a[0]; |
2297 | a1 = a[1]; | |
2298 | ||
2299 | switch (call) { | |
2300 | case SYS_SOCKET: | |
2301 | err = sys_socket(a0, a1, a[2]); | |
2302 | break; | |
2303 | case SYS_BIND: | |
2304 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2305 | break; | |
2306 | case SYS_CONNECT: | |
2307 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2308 | break; | |
2309 | case SYS_LISTEN: | |
2310 | err = sys_listen(a0, a1); | |
2311 | break; | |
2312 | case SYS_ACCEPT: | |
de11defe UD |
2313 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2314 | (int __user *)a[2], 0); | |
89bddce5 SH |
2315 | break; |
2316 | case SYS_GETSOCKNAME: | |
2317 | err = | |
2318 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2319 | (int __user *)a[2]); | |
2320 | break; | |
2321 | case SYS_GETPEERNAME: | |
2322 | err = | |
2323 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2324 | (int __user *)a[2]); | |
2325 | break; | |
2326 | case SYS_SOCKETPAIR: | |
2327 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2328 | break; | |
2329 | case SYS_SEND: | |
2330 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2331 | break; | |
2332 | case SYS_SENDTO: | |
2333 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2334 | (struct sockaddr __user *)a[4], a[5]); | |
2335 | break; | |
2336 | case SYS_RECV: | |
2337 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2338 | break; | |
2339 | case SYS_RECVFROM: | |
2340 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2341 | (struct sockaddr __user *)a[4], | |
2342 | (int __user *)a[5]); | |
2343 | break; | |
2344 | case SYS_SHUTDOWN: | |
2345 | err = sys_shutdown(a0, a1); | |
2346 | break; | |
2347 | case SYS_SETSOCKOPT: | |
2348 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2349 | break; | |
2350 | case SYS_GETSOCKOPT: | |
2351 | err = | |
2352 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2353 | (int __user *)a[4]); | |
2354 | break; | |
2355 | case SYS_SENDMSG: | |
2356 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2357 | break; | |
2358 | case SYS_RECVMSG: | |
2359 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2360 | break; | |
a2e27255 ACM |
2361 | case SYS_RECVMMSG: |
2362 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2363 | (struct timespec __user *)a[4]); | |
2364 | break; | |
de11defe UD |
2365 | case SYS_ACCEPT4: |
2366 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2367 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2368 | break; |
89bddce5 SH |
2369 | default: |
2370 | err = -EINVAL; | |
2371 | break; | |
1da177e4 LT |
2372 | } |
2373 | return err; | |
2374 | } | |
2375 | ||
89bddce5 | 2376 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2377 | |
55737fda SH |
2378 | /** |
2379 | * sock_register - add a socket protocol handler | |
2380 | * @ops: description of protocol | |
2381 | * | |
1da177e4 LT |
2382 | * This function is called by a protocol handler that wants to |
2383 | * advertise its address family, and have it linked into the | |
55737fda SH |
2384 | * socket interface. The value ops->family coresponds to the |
2385 | * socket system call protocol family. | |
1da177e4 | 2386 | */ |
f0fd27d4 | 2387 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2388 | { |
2389 | int err; | |
2390 | ||
2391 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2392 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2393 | NPROTO); | |
1da177e4 LT |
2394 | return -ENOBUFS; |
2395 | } | |
55737fda SH |
2396 | |
2397 | spin_lock(&net_family_lock); | |
2398 | if (net_families[ops->family]) | |
2399 | err = -EEXIST; | |
2400 | else { | |
89bddce5 | 2401 | net_families[ops->family] = ops; |
1da177e4 LT |
2402 | err = 0; |
2403 | } | |
55737fda SH |
2404 | spin_unlock(&net_family_lock); |
2405 | ||
89bddce5 | 2406 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2407 | return err; |
2408 | } | |
2409 | ||
55737fda SH |
2410 | /** |
2411 | * sock_unregister - remove a protocol handler | |
2412 | * @family: protocol family to remove | |
2413 | * | |
1da177e4 LT |
2414 | * This function is called by a protocol handler that wants to |
2415 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2416 | * new socket creation. |
2417 | * | |
2418 | * If protocol handler is a module, then it can use module reference | |
2419 | * counts to protect against new references. If protocol handler is not | |
2420 | * a module then it needs to provide its own protection in | |
2421 | * the ops->create routine. | |
1da177e4 | 2422 | */ |
f0fd27d4 | 2423 | void sock_unregister(int family) |
1da177e4 | 2424 | { |
f0fd27d4 | 2425 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2426 | |
55737fda | 2427 | spin_lock(&net_family_lock); |
89bddce5 | 2428 | net_families[family] = NULL; |
55737fda SH |
2429 | spin_unlock(&net_family_lock); |
2430 | ||
2431 | synchronize_rcu(); | |
2432 | ||
89bddce5 | 2433 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 LT |
2434 | } |
2435 | ||
77d76ea3 | 2436 | static int __init sock_init(void) |
1da177e4 LT |
2437 | { |
2438 | /* | |
89bddce5 | 2439 | * Initialize sock SLAB cache. |
1da177e4 | 2440 | */ |
89bddce5 | 2441 | |
1da177e4 LT |
2442 | sk_init(); |
2443 | ||
1da177e4 | 2444 | /* |
89bddce5 | 2445 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2446 | */ |
2447 | skb_init(); | |
1da177e4 LT |
2448 | |
2449 | /* | |
89bddce5 | 2450 | * Initialize the protocols module. |
1da177e4 LT |
2451 | */ |
2452 | ||
2453 | init_inodecache(); | |
2454 | register_filesystem(&sock_fs_type); | |
2455 | sock_mnt = kern_mount(&sock_fs_type); | |
77d76ea3 AK |
2456 | |
2457 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2458 | */ |
2459 | ||
2460 | #ifdef CONFIG_NETFILTER | |
2461 | netfilter_init(); | |
2462 | #endif | |
cbeb321a DM |
2463 | |
2464 | return 0; | |
1da177e4 LT |
2465 | } |
2466 | ||
77d76ea3 AK |
2467 | core_initcall(sock_init); /* early initcall */ |
2468 | ||
1da177e4 LT |
2469 | #ifdef CONFIG_PROC_FS |
2470 | void socket_seq_show(struct seq_file *seq) | |
2471 | { | |
2472 | int cpu; | |
2473 | int counter = 0; | |
2474 | ||
6f912042 | 2475 | for_each_possible_cpu(cpu) |
89bddce5 | 2476 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2477 | |
2478 | /* It can be negative, by the way. 8) */ | |
2479 | if (counter < 0) | |
2480 | counter = 0; | |
2481 | ||
2482 | seq_printf(seq, "sockets: used %d\n", counter); | |
2483 | } | |
89bddce5 | 2484 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2485 | |
89bbfc95 | 2486 | #ifdef CONFIG_COMPAT |
6b96018b AB |
2487 | static int do_siocgstamp(struct net *net, struct socket *sock, |
2488 | unsigned int cmd, struct compat_timeval __user *up) | |
7a229387 | 2489 | { |
7a229387 AB |
2490 | mm_segment_t old_fs = get_fs(); |
2491 | struct timeval ktv; | |
2492 | int err; | |
2493 | ||
2494 | set_fs(KERNEL_DS); | |
6b96018b | 2495 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 AB |
2496 | set_fs(old_fs); |
2497 | if (!err) { | |
2498 | err = put_user(ktv.tv_sec, &up->tv_sec); | |
2499 | err |= __put_user(ktv.tv_usec, &up->tv_usec); | |
2500 | } | |
2501 | return err; | |
2502 | } | |
2503 | ||
6b96018b AB |
2504 | static int do_siocgstampns(struct net *net, struct socket *sock, |
2505 | unsigned int cmd, struct compat_timespec __user *up) | |
7a229387 | 2506 | { |
7a229387 AB |
2507 | mm_segment_t old_fs = get_fs(); |
2508 | struct timespec kts; | |
2509 | int err; | |
2510 | ||
2511 | set_fs(KERNEL_DS); | |
6b96018b | 2512 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 AB |
2513 | set_fs(old_fs); |
2514 | if (!err) { | |
2515 | err = put_user(kts.tv_sec, &up->tv_sec); | |
2516 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); | |
2517 | } | |
2518 | return err; | |
2519 | } | |
2520 | ||
6b96018b | 2521 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2522 | { |
2523 | struct ifreq __user *uifr; | |
2524 | int err; | |
2525 | ||
2526 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2527 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2528 | return -EFAULT; |
2529 | ||
6b96018b | 2530 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2531 | if (err) |
2532 | return err; | |
2533 | ||
6b96018b | 2534 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2535 | return -EFAULT; |
2536 | ||
2537 | return 0; | |
2538 | } | |
2539 | ||
6b96018b | 2540 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2541 | { |
6b96018b | 2542 | struct compat_ifconf ifc32; |
7a229387 AB |
2543 | struct ifconf ifc; |
2544 | struct ifconf __user *uifc; | |
6b96018b | 2545 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2546 | struct ifreq __user *ifr; |
2547 | unsigned int i, j; | |
2548 | int err; | |
2549 | ||
6b96018b | 2550 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2551 | return -EFAULT; |
2552 | ||
2553 | if (ifc32.ifcbuf == 0) { | |
2554 | ifc32.ifc_len = 0; | |
2555 | ifc.ifc_len = 0; | |
2556 | ifc.ifc_req = NULL; | |
2557 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2558 | } else { | |
6b96018b | 2559 | size_t len =((ifc32.ifc_len / sizeof (struct compat_ifreq)) + 1) * |
7a229387 AB |
2560 | sizeof (struct ifreq); |
2561 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); | |
2562 | ifc.ifc_len = len; | |
2563 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2564 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
6b96018b AB |
2565 | for (i = 0; i < ifc32.ifc_len; i += sizeof (struct compat_ifreq)) { |
2566 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2567 | return -EFAULT; |
2568 | ifr++; | |
2569 | ifr32++; | |
2570 | } | |
2571 | } | |
2572 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2573 | return -EFAULT; | |
2574 | ||
6b96018b | 2575 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2576 | if (err) |
2577 | return err; | |
2578 | ||
2579 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2580 | return -EFAULT; | |
2581 | ||
2582 | ifr = ifc.ifc_req; | |
2583 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2584 | for (i = 0, j = 0; | |
6b96018b AB |
2585 | i + sizeof (struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2586 | i += sizeof (struct compat_ifreq), j += sizeof (struct ifreq)) { | |
2587 | if (copy_in_user(ifr32, ifr, sizeof (struct compat_ifreq))) | |
7a229387 AB |
2588 | return -EFAULT; |
2589 | ifr32++; | |
2590 | ifr++; | |
2591 | } | |
2592 | ||
2593 | if (ifc32.ifcbuf == 0) { | |
2594 | /* Translate from 64-bit structure multiple to | |
2595 | * a 32-bit one. | |
2596 | */ | |
2597 | i = ifc.ifc_len; | |
6b96018b | 2598 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2599 | ifc32.ifc_len = i; |
2600 | } else { | |
2601 | ifc32.ifc_len = i; | |
2602 | } | |
6b96018b | 2603 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2604 | return -EFAULT; |
2605 | ||
2606 | return 0; | |
2607 | } | |
2608 | ||
6b96018b | 2609 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 AB |
2610 | { |
2611 | struct ifreq __user *ifr; | |
7a229387 AB |
2612 | u32 data; |
2613 | void __user *datap; | |
2614 | ||
2615 | ifr = compat_alloc_user_space(sizeof(*ifr)); | |
7a229387 AB |
2616 | |
2617 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2618 | return -EFAULT; | |
2619 | ||
2620 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2621 | return -EFAULT; | |
2622 | ||
2623 | datap = compat_ptr(data); | |
2624 | if (put_user(datap, &ifr->ifr_ifru.ifru_data)) | |
2625 | return -EFAULT; | |
2626 | ||
6b96018b | 2627 | return dev_ioctl(net, SIOCETHTOOL, ifr); |
7a229387 AB |
2628 | } |
2629 | ||
7a50a240 AB |
2630 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2631 | { | |
2632 | void __user *uptr; | |
2633 | compat_uptr_t uptr32; | |
2634 | struct ifreq __user *uifr; | |
2635 | ||
2636 | uifr = compat_alloc_user_space(sizeof (*uifr)); | |
2637 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2638 | return -EFAULT; | |
2639 | ||
2640 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2641 | return -EFAULT; | |
2642 | ||
2643 | uptr = compat_ptr(uptr32); | |
2644 | ||
2645 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2646 | return -EFAULT; | |
2647 | ||
2648 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2649 | } | |
2650 | ||
6b96018b AB |
2651 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2652 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2653 | { |
2654 | struct ifreq kifr; | |
2655 | struct ifreq __user *uifr; | |
7a229387 AB |
2656 | mm_segment_t old_fs; |
2657 | int err; | |
2658 | u32 data; | |
2659 | void __user *datap; | |
2660 | ||
2661 | switch (cmd) { | |
2662 | case SIOCBONDENSLAVE: | |
2663 | case SIOCBONDRELEASE: | |
2664 | case SIOCBONDSETHWADDR: | |
2665 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2666 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2667 | return -EFAULT; |
2668 | ||
2669 | old_fs = get_fs(); | |
2670 | set_fs (KERNEL_DS); | |
6b96018b | 2671 | err = dev_ioctl(net, cmd, &kifr); |
7a229387 AB |
2672 | set_fs (old_fs); |
2673 | ||
2674 | return err; | |
2675 | case SIOCBONDSLAVEINFOQUERY: | |
2676 | case SIOCBONDINFOQUERY: | |
2677 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2678 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2679 | return -EFAULT; | |
2680 | ||
2681 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2682 | return -EFAULT; | |
2683 | ||
2684 | datap = compat_ptr(data); | |
2685 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2686 | return -EFAULT; | |
2687 | ||
6b96018b | 2688 | return dev_ioctl(net, cmd, uifr); |
7a229387 AB |
2689 | default: |
2690 | return -EINVAL; | |
2691 | }; | |
2692 | } | |
2693 | ||
6b96018b AB |
2694 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2695 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2696 | { |
2697 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2698 | char tmp_buf[IFNAMSIZ]; |
2699 | void __user *data64; | |
2700 | u32 data32; | |
2701 | ||
2702 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2703 | IFNAMSIZ)) | |
2704 | return -EFAULT; | |
2705 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2706 | return -EFAULT; | |
2707 | data64 = compat_ptr(data32); | |
2708 | ||
2709 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2710 | ||
2711 | /* Don't check these user accesses, just let that get trapped | |
2712 | * in the ioctl handler instead. | |
2713 | */ | |
2714 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2715 | IFNAMSIZ)) | |
2716 | return -EFAULT; | |
2717 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2718 | return -EFAULT; | |
2719 | ||
6b96018b | 2720 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2721 | } |
2722 | ||
6b96018b AB |
2723 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2724 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 AB |
2725 | { |
2726 | struct ifreq ifr; | |
6b96018b | 2727 | struct compat_ifmap __user *uifmap32; |
7a229387 AB |
2728 | mm_segment_t old_fs; |
2729 | int err; | |
2730 | ||
7a229387 AB |
2731 | uifmap32 = &uifr32->ifr_ifru.ifru_map; |
2732 | switch (cmd) { | |
2733 | case SIOCSIFMAP: | |
2734 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
2735 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2736 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2737 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2738 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2739 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2740 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
2741 | if (err) | |
2742 | return -EFAULT; | |
2743 | break; | |
2744 | case SIOCSHWTSTAMP: | |
2745 | if (copy_from_user(&ifr, uifr32, sizeof(*uifr32))) | |
2746 | return -EFAULT; | |
2747 | ifr.ifr_data = compat_ptr(uifr32->ifr_ifru.ifru_data); | |
2748 | break; | |
2749 | default: | |
2750 | if (copy_from_user(&ifr, uifr32, sizeof(*uifr32))) | |
2751 | return -EFAULT; | |
2752 | break; | |
2753 | } | |
2754 | old_fs = get_fs(); | |
2755 | set_fs (KERNEL_DS); | |
6b96018b | 2756 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ifr); |
7a229387 AB |
2757 | set_fs (old_fs); |
2758 | if (!err) { | |
2759 | switch (cmd) { | |
2760 | case SIOCGIFFLAGS: | |
2761 | case SIOCGIFMETRIC: | |
2762 | case SIOCGIFMTU: | |
2763 | case SIOCGIFMEM: | |
2764 | case SIOCGIFHWADDR: | |
2765 | case SIOCGIFINDEX: | |
2766 | case SIOCGIFADDR: | |
2767 | case SIOCGIFBRDADDR: | |
2768 | case SIOCGIFDSTADDR: | |
2769 | case SIOCGIFNETMASK: | |
fab2532b | 2770 | case SIOCGIFPFLAGS: |
7a229387 | 2771 | case SIOCGIFTXQLEN: |
fab2532b AB |
2772 | case SIOCGMIIPHY: |
2773 | case SIOCGMIIREG: | |
7a229387 AB |
2774 | if (copy_to_user(uifr32, &ifr, sizeof(*uifr32))) |
2775 | return -EFAULT; | |
2776 | break; | |
2777 | case SIOCGIFMAP: | |
2778 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
2779 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2780 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2781 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2782 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2783 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2784 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
2785 | if (err) | |
2786 | err = -EFAULT; | |
2787 | break; | |
2788 | } | |
2789 | } | |
2790 | return err; | |
2791 | } | |
2792 | ||
2793 | struct rtentry32 { | |
2794 | u32 rt_pad1; | |
2795 | struct sockaddr rt_dst; /* target address */ | |
2796 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
2797 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
2798 | unsigned short rt_flags; | |
2799 | short rt_pad2; | |
2800 | u32 rt_pad3; | |
2801 | unsigned char rt_tos; | |
2802 | unsigned char rt_class; | |
2803 | short rt_pad4; | |
2804 | short rt_metric; /* +1 for binary compatibility! */ | |
2805 | /* char * */ u32 rt_dev; /* forcing the device at add */ | |
2806 | u32 rt_mtu; /* per route MTU/Window */ | |
2807 | u32 rt_window; /* Window clamping */ | |
2808 | unsigned short rt_irtt; /* Initial RTT */ | |
2809 | }; | |
2810 | ||
2811 | struct in6_rtmsg32 { | |
2812 | struct in6_addr rtmsg_dst; | |
2813 | struct in6_addr rtmsg_src; | |
2814 | struct in6_addr rtmsg_gateway; | |
2815 | u32 rtmsg_type; | |
2816 | u16 rtmsg_dst_len; | |
2817 | u16 rtmsg_src_len; | |
2818 | u32 rtmsg_metric; | |
2819 | u32 rtmsg_info; | |
2820 | u32 rtmsg_flags; | |
2821 | s32 rtmsg_ifindex; | |
2822 | }; | |
2823 | ||
6b96018b AB |
2824 | static int routing_ioctl(struct net *net, struct socket *sock, |
2825 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
2826 | { |
2827 | int ret; | |
2828 | void *r = NULL; | |
2829 | struct in6_rtmsg r6; | |
2830 | struct rtentry r4; | |
2831 | char devname[16]; | |
2832 | u32 rtdev; | |
2833 | mm_segment_t old_fs = get_fs(); | |
2834 | ||
6b96018b AB |
2835 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
2836 | struct in6_rtmsg32 __user *ur6 = argp; | |
7a229387 AB |
2837 | ret = copy_from_user (&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
2838 | 3 * sizeof(struct in6_addr)); | |
2839 | ret |= __get_user (r6.rtmsg_type, &(ur6->rtmsg_type)); | |
2840 | ret |= __get_user (r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
2841 | ret |= __get_user (r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
2842 | ret |= __get_user (r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
2843 | ret |= __get_user (r6.rtmsg_info, &(ur6->rtmsg_info)); | |
2844 | ret |= __get_user (r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
2845 | ret |= __get_user (r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
2846 | ||
2847 | r = (void *) &r6; | |
2848 | } else { /* ipv4 */ | |
6b96018b | 2849 | struct rtentry32 __user *ur4 = argp; |
7a229387 AB |
2850 | ret = copy_from_user (&r4.rt_dst, &(ur4->rt_dst), |
2851 | 3 * sizeof(struct sockaddr)); | |
2852 | ret |= __get_user (r4.rt_flags, &(ur4->rt_flags)); | |
2853 | ret |= __get_user (r4.rt_metric, &(ur4->rt_metric)); | |
2854 | ret |= __get_user (r4.rt_mtu, &(ur4->rt_mtu)); | |
2855 | ret |= __get_user (r4.rt_window, &(ur4->rt_window)); | |
2856 | ret |= __get_user (r4.rt_irtt, &(ur4->rt_irtt)); | |
2857 | ret |= __get_user (rtdev, &(ur4->rt_dev)); | |
2858 | if (rtdev) { | |
2859 | ret |= copy_from_user (devname, compat_ptr(rtdev), 15); | |
2860 | r4.rt_dev = devname; devname[15] = 0; | |
2861 | } else | |
2862 | r4.rt_dev = NULL; | |
2863 | ||
2864 | r = (void *) &r4; | |
2865 | } | |
2866 | ||
2867 | if (ret) { | |
2868 | ret = -EFAULT; | |
2869 | goto out; | |
2870 | } | |
2871 | ||
2872 | set_fs (KERNEL_DS); | |
6b96018b | 2873 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
7a229387 AB |
2874 | set_fs (old_fs); |
2875 | ||
2876 | out: | |
7a229387 AB |
2877 | return ret; |
2878 | } | |
2879 | ||
2880 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
2881 | * for some operations; this forces use of the newer bridge-utils that | |
2882 | * use compatiable ioctls | |
2883 | */ | |
6b96018b | 2884 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 2885 | { |
6b96018b | 2886 | compat_ulong_t tmp; |
7a229387 | 2887 | |
6b96018b | 2888 | if (get_user(tmp, argp)) |
7a229387 AB |
2889 | return -EFAULT; |
2890 | if (tmp == BRCTL_GET_VERSION) | |
2891 | return BRCTL_VERSION + 1; | |
2892 | return -EINVAL; | |
2893 | } | |
2894 | ||
2895 | struct atmif_sioc32 { | |
2896 | compat_int_t number; | |
2897 | compat_int_t length; | |
2898 | compat_caddr_t arg; | |
2899 | }; | |
2900 | ||
2901 | struct atm_iobuf32 { | |
2902 | compat_int_t length; | |
2903 | compat_caddr_t buffer; | |
2904 | }; | |
2905 | ||
2906 | #define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct atmif_sioc32) | |
2907 | #define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct atm_iobuf32) | |
2908 | #define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct atmif_sioc32) | |
2909 | #define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct atmif_sioc32) | |
2910 | #define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct atmif_sioc32) | |
2911 | #define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct atmif_sioc32) | |
2912 | #define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct atmif_sioc32) | |
2913 | #define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct atmif_sioc32) | |
2914 | #define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct atmif_sioc32) | |
2915 | #define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct atmif_sioc32) | |
2916 | #define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct atmif_sioc32) | |
2917 | #define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct atmif_sioc32) | |
2918 | #define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct atmif_sioc32) | |
2919 | #define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct atmif_sioc32) | |
2920 | #define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct atmif_sioc32) | |
2921 | #define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct atmif_sioc32) | |
2922 | #define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct atmif_sioc32) | |
2923 | ||
2924 | static struct { | |
2925 | unsigned int cmd32; | |
2926 | unsigned int cmd; | |
2927 | } atm_ioctl_map[] = { | |
2928 | { ATM_GETLINKRATE32, ATM_GETLINKRATE }, | |
2929 | { ATM_GETNAMES32, ATM_GETNAMES }, | |
2930 | { ATM_GETTYPE32, ATM_GETTYPE }, | |
2931 | { ATM_GETESI32, ATM_GETESI }, | |
2932 | { ATM_GETADDR32, ATM_GETADDR }, | |
2933 | { ATM_RSTADDR32, ATM_RSTADDR }, | |
2934 | { ATM_ADDADDR32, ATM_ADDADDR }, | |
2935 | { ATM_DELADDR32, ATM_DELADDR }, | |
2936 | { ATM_GETCIRANGE32, ATM_GETCIRANGE }, | |
2937 | { ATM_SETCIRANGE32, ATM_SETCIRANGE }, | |
2938 | { ATM_SETESI32, ATM_SETESI }, | |
2939 | { ATM_SETESIF32, ATM_SETESIF }, | |
2940 | { ATM_GETSTAT32, ATM_GETSTAT }, | |
2941 | { ATM_GETSTATZ32, ATM_GETSTATZ }, | |
2942 | { ATM_GETLOOP32, ATM_GETLOOP }, | |
2943 | { ATM_SETLOOP32, ATM_SETLOOP }, | |
2944 | { ATM_QUERYLOOP32, ATM_QUERYLOOP } | |
2945 | }; | |
2946 | ||
2947 | #define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map) | |
2948 | ||
6b96018b AB |
2949 | static int do_atm_iobuf(struct net *net, struct socket *sock, |
2950 | unsigned int cmd, unsigned long arg) | |
7a229387 AB |
2951 | { |
2952 | struct atm_iobuf __user *iobuf; | |
2953 | struct atm_iobuf32 __user *iobuf32; | |
2954 | u32 data; | |
2955 | void __user *datap; | |
2956 | int len, err; | |
2957 | ||
2958 | iobuf = compat_alloc_user_space(sizeof(*iobuf)); | |
2959 | iobuf32 = compat_ptr(arg); | |
2960 | ||
2961 | if (get_user(len, &iobuf32->length) || | |
2962 | get_user(data, &iobuf32->buffer)) | |
2963 | return -EFAULT; | |
2964 | datap = compat_ptr(data); | |
2965 | if (put_user(len, &iobuf->length) || | |
2966 | put_user(datap, &iobuf->buffer)) | |
2967 | return -EFAULT; | |
2968 | ||
6b96018b | 2969 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)iobuf); |
7a229387 AB |
2970 | |
2971 | if (!err) { | |
2972 | if (copy_in_user(&iobuf32->length, &iobuf->length, | |
2973 | sizeof(int))) | |
2974 | err = -EFAULT; | |
2975 | } | |
2976 | ||
2977 | return err; | |
2978 | } | |
2979 | ||
6b96018b AB |
2980 | static int do_atmif_sioc(struct net *net, struct socket *sock, |
2981 | unsigned int cmd, unsigned long arg) | |
7a229387 AB |
2982 | { |
2983 | struct atmif_sioc __user *sioc; | |
2984 | struct atmif_sioc32 __user *sioc32; | |
2985 | u32 data; | |
2986 | void __user *datap; | |
2987 | int err; | |
2988 | ||
2989 | sioc = compat_alloc_user_space(sizeof(*sioc)); | |
2990 | sioc32 = compat_ptr(arg); | |
2991 | ||
2992 | if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int)) || | |
2993 | get_user(data, &sioc32->arg)) | |
2994 | return -EFAULT; | |
2995 | datap = compat_ptr(data); | |
2996 | if (put_user(datap, &sioc->arg)) | |
2997 | return -EFAULT; | |
2998 | ||
6b96018b | 2999 | err = sock_do_ioctl(net, sock, cmd, (unsigned long) sioc); |
7a229387 AB |
3000 | |
3001 | if (!err) { | |
3002 | if (copy_in_user(&sioc32->length, &sioc->length, | |
3003 | sizeof(int))) | |
3004 | err = -EFAULT; | |
3005 | } | |
3006 | return err; | |
3007 | } | |
3008 | ||
6b96018b AB |
3009 | static int do_atm_ioctl(struct net *net, struct socket *sock, |
3010 | unsigned int cmd32, unsigned long arg) | |
7a229387 AB |
3011 | { |
3012 | int i; | |
3013 | unsigned int cmd = 0; | |
3014 | ||
3015 | switch (cmd32) { | |
3016 | case SONET_GETSTAT: | |
3017 | case SONET_GETSTATZ: | |
3018 | case SONET_GETDIAG: | |
3019 | case SONET_SETDIAG: | |
3020 | case SONET_CLRDIAG: | |
3021 | case SONET_SETFRAMING: | |
3022 | case SONET_GETFRAMING: | |
3023 | case SONET_GETFRSENSE: | |
6b96018b | 3024 | return do_atmif_sioc(net, sock, cmd32, arg); |
7a229387 AB |
3025 | } |
3026 | ||
3027 | for (i = 0; i < NR_ATM_IOCTL; i++) { | |
3028 | if (cmd32 == atm_ioctl_map[i].cmd32) { | |
3029 | cmd = atm_ioctl_map[i].cmd; | |
3030 | break; | |
3031 | } | |
3032 | } | |
3033 | if (i == NR_ATM_IOCTL) | |
3034 | return -EINVAL; | |
3035 | ||
3036 | switch (cmd) { | |
3037 | case ATM_GETNAMES: | |
6b96018b | 3038 | return do_atm_iobuf(net, sock, cmd, arg); |
7a229387 AB |
3039 | |
3040 | case ATM_GETLINKRATE: | |
3041 | case ATM_GETTYPE: | |
3042 | case ATM_GETESI: | |
3043 | case ATM_GETADDR: | |
3044 | case ATM_RSTADDR: | |
3045 | case ATM_ADDADDR: | |
3046 | case ATM_DELADDR: | |
3047 | case ATM_GETCIRANGE: | |
3048 | case ATM_SETCIRANGE: | |
3049 | case ATM_SETESI: | |
3050 | case ATM_SETESIF: | |
3051 | case ATM_GETSTAT: | |
3052 | case ATM_GETSTATZ: | |
3053 | case ATM_GETLOOP: | |
3054 | case ATM_SETLOOP: | |
3055 | case ATM_QUERYLOOP: | |
6b96018b | 3056 | return do_atmif_sioc(net, sock, cmd, arg); |
7a229387 AB |
3057 | } |
3058 | ||
3059 | return -EINVAL; | |
3060 | } | |
3061 | ||
6b96018b AB |
3062 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3063 | unsigned int cmd, unsigned long arg) | |
3064 | { | |
3065 | void __user *argp = compat_ptr(arg); | |
3066 | struct sock *sk = sock->sk; | |
3067 | struct net *net = sock_net(sk); | |
7a229387 | 3068 | |
6b96018b AB |
3069 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
3070 | return siocdevprivate_ioctl(net, cmd, argp); | |
3071 | ||
3072 | switch (cmd) { | |
3073 | case SIOCSIFBR: | |
3074 | case SIOCGIFBR: | |
3075 | return old_bridge_ioctl(argp); | |
3076 | case SIOCGIFNAME: | |
3077 | return dev_ifname32(net, argp); | |
3078 | case SIOCGIFCONF: | |
3079 | return dev_ifconf(net, argp); | |
3080 | case SIOCETHTOOL: | |
3081 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3082 | case SIOCWANDEV: |
3083 | return compat_siocwandev(net, argp); | |
6b96018b AB |
3084 | case SIOCBONDENSLAVE: |
3085 | case SIOCBONDRELEASE: | |
3086 | case SIOCBONDSETHWADDR: | |
3087 | case SIOCBONDSLAVEINFOQUERY: | |
3088 | case SIOCBONDINFOQUERY: | |
3089 | case SIOCBONDCHANGEACTIVE: | |
3090 | return bond_ioctl(net, cmd, argp); | |
3091 | case SIOCADDRT: | |
3092 | case SIOCDELRT: | |
3093 | return routing_ioctl(net, sock, cmd, argp); | |
3094 | case SIOCGSTAMP: | |
3095 | return do_siocgstamp(net, sock, cmd, argp); | |
3096 | case SIOCGSTAMPNS: | |
3097 | return do_siocgstampns(net, sock, cmd, argp); | |
6b96018b AB |
3098 | |
3099 | case FIOSETOWN: | |
3100 | case SIOCSPGRP: | |
3101 | case FIOGETOWN: | |
3102 | case SIOCGPGRP: | |
3103 | case SIOCBRADDBR: | |
3104 | case SIOCBRDELBR: | |
3105 | case SIOCGIFVLAN: | |
3106 | case SIOCSIFVLAN: | |
3107 | case SIOCADDDLCI: | |
3108 | case SIOCDELDLCI: | |
3109 | return sock_ioctl(file, cmd, arg); | |
3110 | ||
3111 | case SIOCGIFFLAGS: | |
3112 | case SIOCSIFFLAGS: | |
3113 | case SIOCGIFMETRIC: | |
3114 | case SIOCSIFMETRIC: | |
3115 | case SIOCGIFMTU: | |
3116 | case SIOCSIFMTU: | |
3117 | case SIOCGIFMEM: | |
3118 | case SIOCSIFMEM: | |
3119 | case SIOCGIFHWADDR: | |
3120 | case SIOCSIFHWADDR: | |
3121 | case SIOCADDMULTI: | |
3122 | case SIOCDELMULTI: | |
3123 | case SIOCGIFINDEX: | |
3124 | case SIOCGIFMAP: | |
3125 | case SIOCSIFMAP: | |
3126 | case SIOCGIFADDR: | |
3127 | case SIOCSIFADDR: | |
3128 | case SIOCSIFHWBROADCAST: | |
3129 | case SIOCSHWTSTAMP: | |
3130 | case SIOCDIFADDR: | |
6b96018b AB |
3131 | case SIOCGIFBRDADDR: |
3132 | case SIOCSIFBRDADDR: | |
3133 | case SIOCGIFDSTADDR: | |
3134 | case SIOCSIFDSTADDR: | |
3135 | case SIOCGIFNETMASK: | |
3136 | case SIOCSIFNETMASK: | |
3137 | case SIOCSIFPFLAGS: | |
3138 | case SIOCGIFPFLAGS: | |
3139 | case SIOCGIFTXQLEN: | |
3140 | case SIOCSIFTXQLEN: | |
3141 | case SIOCBRADDIF: | |
3142 | case SIOCBRDELIF: | |
9177efd3 AB |
3143 | case SIOCSIFNAME: |
3144 | case SIOCGMIIPHY: | |
3145 | case SIOCGMIIREG: | |
3146 | case SIOCSMIIREG: | |
6b96018b | 3147 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3148 | |
6b96018b AB |
3149 | case ATM_GETLINKRATE32: |
3150 | case ATM_GETNAMES32: | |
3151 | case ATM_GETTYPE32: | |
3152 | case ATM_GETESI32: | |
3153 | case ATM_GETADDR32: | |
3154 | case ATM_RSTADDR32: | |
3155 | case ATM_ADDADDR32: | |
3156 | case ATM_DELADDR32: | |
3157 | case ATM_GETCIRANGE32: | |
3158 | case ATM_SETCIRANGE32: | |
3159 | case ATM_SETESI32: | |
3160 | case ATM_SETESIF32: | |
3161 | case ATM_GETSTAT32: | |
3162 | case ATM_GETSTATZ32: | |
3163 | case ATM_GETLOOP32: | |
3164 | case ATM_SETLOOP32: | |
3165 | case ATM_QUERYLOOP32: | |
3166 | case SONET_GETSTAT: | |
3167 | case SONET_GETSTATZ: | |
3168 | case SONET_GETDIAG: | |
3169 | case SONET_SETDIAG: | |
3170 | case SONET_CLRDIAG: | |
3171 | case SONET_SETFRAMING: | |
3172 | case SONET_GETFRAMING: | |
3173 | case SONET_GETFRSENSE: | |
3174 | return do_atm_ioctl(net, sock, cmd, arg); | |
3175 | ||
3176 | case ATMSIGD_CTRL: | |
3177 | case ATMARPD_CTRL: | |
3178 | case ATMLEC_CTRL: | |
3179 | case ATMLEC_MCAST: | |
3180 | case ATMLEC_DATA: | |
3181 | case ATM_SETSC: | |
3182 | case SIOCSIFATMTCP: | |
3183 | case SIOCMKCLIP: | |
3184 | case ATMARP_MKIP: | |
3185 | case ATMARP_SETENTRY: | |
3186 | case ATMARP_ENCAP: | |
3187 | case ATMTCP_CREATE: | |
3188 | case ATMTCP_REMOVE: | |
3189 | case ATMMPC_CTRL: | |
3190 | case ATMMPC_DATA: | |
3191 | ||
3192 | case SIOCSARP: | |
3193 | case SIOCGARP: | |
3194 | case SIOCDARP: | |
6b96018b | 3195 | case SIOCATMARK: |
9177efd3 AB |
3196 | return sock_do_ioctl(net, sock, cmd, arg); |
3197 | } | |
3198 | ||
3199 | /* Prevent warning from compat_sys_ioctl, these always | |
3200 | * result in -EINVAL in the native case anyway. */ | |
3201 | switch (cmd) { | |
3202 | case SIOCRTMSG: | |
3203 | case SIOCGIFCOUNT: | |
6b96018b AB |
3204 | case SIOCSRARP: |
3205 | case SIOCGRARP: | |
3206 | case SIOCDRARP: | |
9177efd3 AB |
3207 | case SIOCSIFLINK: |
3208 | case SIOCGIFSLAVE: | |
3209 | case SIOCSIFSLAVE: | |
3210 | return -EINVAL; | |
6b96018b AB |
3211 | } |
3212 | ||
3213 | return -ENOIOCTLCMD; | |
3214 | } | |
7a229387 | 3215 | |
89bbfc95 | 3216 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
89bddce5 | 3217 | unsigned long arg) |
89bbfc95 SP |
3218 | { |
3219 | struct socket *sock = file->private_data; | |
3220 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3221 | struct sock *sk; |
3222 | struct net *net; | |
3223 | ||
3224 | sk = sock->sk; | |
3225 | net = sock_net(sk); | |
89bbfc95 SP |
3226 | |
3227 | if (sock->ops->compat_ioctl) | |
3228 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3229 | ||
87de87d5 DM |
3230 | if (ret == -ENOIOCTLCMD && |
3231 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3232 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3233 | ||
6b96018b AB |
3234 | if (ret == -ENOIOCTLCMD) |
3235 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3236 | ||
89bbfc95 SP |
3237 | return ret; |
3238 | } | |
3239 | #endif | |
3240 | ||
ac5a488e SS |
3241 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3242 | { | |
3243 | return sock->ops->bind(sock, addr, addrlen); | |
3244 | } | |
3245 | ||
3246 | int kernel_listen(struct socket *sock, int backlog) | |
3247 | { | |
3248 | return sock->ops->listen(sock, backlog); | |
3249 | } | |
3250 | ||
3251 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3252 | { | |
3253 | struct sock *sk = sock->sk; | |
3254 | int err; | |
3255 | ||
3256 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3257 | newsock); | |
3258 | if (err < 0) | |
3259 | goto done; | |
3260 | ||
3261 | err = sock->ops->accept(sock, *newsock, flags); | |
3262 | if (err < 0) { | |
3263 | sock_release(*newsock); | |
fa8705b0 | 3264 | *newsock = NULL; |
ac5a488e SS |
3265 | goto done; |
3266 | } | |
3267 | ||
3268 | (*newsock)->ops = sock->ops; | |
1b08534e | 3269 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3270 | |
3271 | done: | |
3272 | return err; | |
3273 | } | |
3274 | ||
3275 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3276 | int flags) |
ac5a488e SS |
3277 | { |
3278 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3279 | } | |
3280 | ||
3281 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3282 | int *addrlen) | |
3283 | { | |
3284 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3285 | } | |
3286 | ||
3287 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3288 | int *addrlen) | |
3289 | { | |
3290 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3291 | } | |
3292 | ||
3293 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3294 | char *optval, int *optlen) | |
3295 | { | |
3296 | mm_segment_t oldfs = get_fs(); | |
3297 | int err; | |
3298 | ||
3299 | set_fs(KERNEL_DS); | |
3300 | if (level == SOL_SOCKET) | |
3301 | err = sock_getsockopt(sock, level, optname, optval, optlen); | |
3302 | else | |
3303 | err = sock->ops->getsockopt(sock, level, optname, optval, | |
3304 | optlen); | |
3305 | set_fs(oldfs); | |
3306 | return err; | |
3307 | } | |
3308 | ||
3309 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3310 | char *optval, unsigned int optlen) |
ac5a488e SS |
3311 | { |
3312 | mm_segment_t oldfs = get_fs(); | |
3313 | int err; | |
3314 | ||
3315 | set_fs(KERNEL_DS); | |
3316 | if (level == SOL_SOCKET) | |
3317 | err = sock_setsockopt(sock, level, optname, optval, optlen); | |
3318 | else | |
3319 | err = sock->ops->setsockopt(sock, level, optname, optval, | |
3320 | optlen); | |
3321 | set_fs(oldfs); | |
3322 | return err; | |
3323 | } | |
3324 | ||
3325 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3326 | size_t size, int flags) | |
3327 | { | |
3328 | if (sock->ops->sendpage) | |
3329 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3330 | ||
3331 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3332 | } | |
3333 | ||
3334 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3335 | { | |
3336 | mm_segment_t oldfs = get_fs(); | |
3337 | int err; | |
3338 | ||
3339 | set_fs(KERNEL_DS); | |
3340 | err = sock->ops->ioctl(sock, cmd, arg); | |
3341 | set_fs(oldfs); | |
3342 | ||
3343 | return err; | |
3344 | } | |
3345 | ||
91cf45f0 TM |
3346 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3347 | { | |
3348 | return sock->ops->shutdown(sock, how); | |
3349 | } | |
3350 | ||
1da177e4 LT |
3351 | EXPORT_SYMBOL(sock_create); |
3352 | EXPORT_SYMBOL(sock_create_kern); | |
3353 | EXPORT_SYMBOL(sock_create_lite); | |
3354 | EXPORT_SYMBOL(sock_map_fd); | |
3355 | EXPORT_SYMBOL(sock_recvmsg); | |
3356 | EXPORT_SYMBOL(sock_register); | |
3357 | EXPORT_SYMBOL(sock_release); | |
3358 | EXPORT_SYMBOL(sock_sendmsg); | |
3359 | EXPORT_SYMBOL(sock_unregister); | |
3360 | EXPORT_SYMBOL(sock_wake_async); | |
3361 | EXPORT_SYMBOL(sockfd_lookup); | |
3362 | EXPORT_SYMBOL(kernel_sendmsg); | |
3363 | EXPORT_SYMBOL(kernel_recvmsg); | |
ac5a488e SS |
3364 | EXPORT_SYMBOL(kernel_bind); |
3365 | EXPORT_SYMBOL(kernel_listen); | |
3366 | EXPORT_SYMBOL(kernel_accept); | |
3367 | EXPORT_SYMBOL(kernel_connect); | |
3368 | EXPORT_SYMBOL(kernel_getsockname); | |
3369 | EXPORT_SYMBOL(kernel_getpeername); | |
3370 | EXPORT_SYMBOL(kernel_getsockopt); | |
3371 | EXPORT_SYMBOL(kernel_setsockopt); | |
3372 | EXPORT_SYMBOL(kernel_sendpage); | |
3373 | EXPORT_SYMBOL(kernel_sock_ioctl); | |
91cf45f0 | 3374 | EXPORT_SYMBOL(kernel_sock_shutdown); |