Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 LT |
72 | #include <linux/wanrouter.h> |
73 | #include <linux/if_bridge.h> | |
20380731 ACM |
74 | #include <linux/if_frad.h> |
75 | #include <linux/if_vlan.h> | |
1da177e4 LT |
76 | #include <linux/init.h> |
77 | #include <linux/poll.h> | |
78 | #include <linux/cache.h> | |
79 | #include <linux/module.h> | |
80 | #include <linux/highmem.h> | |
1da177e4 LT |
81 | #include <linux/mount.h> |
82 | #include <linux/security.h> | |
83 | #include <linux/syscalls.h> | |
84 | #include <linux/compat.h> | |
85 | #include <linux/kmod.h> | |
3ec3b2fb | 86 | #include <linux/audit.h> |
d86b5e0e | 87 | #include <linux/wireless.h> |
1b8d7ae4 | 88 | #include <linux/nsproxy.h> |
1fd7317d | 89 | #include <linux/magic.h> |
5a0e3ad6 | 90 | #include <linux/slab.h> |
1da177e4 LT |
91 | |
92 | #include <asm/uaccess.h> | |
93 | #include <asm/unistd.h> | |
94 | ||
95 | #include <net/compat.h> | |
87de87d5 | 96 | #include <net/wext.h> |
f8451725 | 97 | #include <net/cls_cgroup.h> |
1da177e4 LT |
98 | |
99 | #include <net/sock.h> | |
100 | #include <linux/netfilter.h> | |
101 | ||
6b96018b AB |
102 | #include <linux/if_tun.h> |
103 | #include <linux/ipv6_route.h> | |
104 | #include <linux/route.h> | |
6b96018b AB |
105 | #include <linux/sockios.h> |
106 | #include <linux/atalk.h> | |
107 | ||
1da177e4 | 108 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
109 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
110 | unsigned long nr_segs, loff_t pos); | |
111 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
112 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 113 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
114 | |
115 | static int sock_close(struct inode *inode, struct file *file); | |
116 | static unsigned int sock_poll(struct file *file, | |
117 | struct poll_table_struct *wait); | |
89bddce5 | 118 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
119 | #ifdef CONFIG_COMPAT |
120 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 121 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 122 | #endif |
1da177e4 | 123 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
124 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
125 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c JA |
126 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
127 | struct pipe_inode_info *pipe, size_t len, | |
128 | unsigned int flags); | |
1da177e4 | 129 | |
1da177e4 LT |
130 | /* |
131 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
132 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
133 | */ | |
134 | ||
da7071d7 | 135 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
136 | .owner = THIS_MODULE, |
137 | .llseek = no_llseek, | |
138 | .aio_read = sock_aio_read, | |
139 | .aio_write = sock_aio_write, | |
140 | .poll = sock_poll, | |
141 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
142 | #ifdef CONFIG_COMPAT |
143 | .compat_ioctl = compat_sock_ioctl, | |
144 | #endif | |
1da177e4 LT |
145 | .mmap = sock_mmap, |
146 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
147 | .release = sock_close, | |
148 | .fasync = sock_fasync, | |
5274f052 JA |
149 | .sendpage = sock_sendpage, |
150 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 151 | .splice_read = sock_splice_read, |
1da177e4 LT |
152 | }; |
153 | ||
154 | /* | |
155 | * The protocol list. Each protocol is registered in here. | |
156 | */ | |
157 | ||
1da177e4 | 158 | static DEFINE_SPINLOCK(net_family_lock); |
f0fd27d4 | 159 | static const struct net_proto_family *net_families[NPROTO] __read_mostly; |
1da177e4 | 160 | |
1da177e4 LT |
161 | /* |
162 | * Statistics counters of the socket lists | |
163 | */ | |
164 | ||
165 | static DEFINE_PER_CPU(int, sockets_in_use) = 0; | |
166 | ||
167 | /* | |
89bddce5 SH |
168 | * Support routines. |
169 | * Move socket addresses back and forth across the kernel/user | |
170 | * divide and look after the messy bits. | |
1da177e4 LT |
171 | */ |
172 | ||
89bddce5 | 173 | #define MAX_SOCK_ADDR 128 /* 108 for Unix domain - |
1da177e4 LT |
174 | 16 for IP, 16 for IPX, |
175 | 24 for IPv6, | |
89bddce5 | 176 | about 80 for AX.25 |
1da177e4 LT |
177 | must be at least one bigger than |
178 | the AF_UNIX size (see net/unix/af_unix.c | |
89bddce5 | 179 | :unix_mkname()). |
1da177e4 | 180 | */ |
89bddce5 | 181 | |
1da177e4 LT |
182 | /** |
183 | * move_addr_to_kernel - copy a socket address into kernel space | |
184 | * @uaddr: Address in user space | |
185 | * @kaddr: Address in kernel space | |
186 | * @ulen: Length in user space | |
187 | * | |
188 | * The address is copied into kernel space. If the provided address is | |
189 | * too long an error code of -EINVAL is returned. If the copy gives | |
190 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
191 | */ | |
192 | ||
230b1839 | 193 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) |
1da177e4 | 194 | { |
230b1839 | 195 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 196 | return -EINVAL; |
89bddce5 | 197 | if (ulen == 0) |
1da177e4 | 198 | return 0; |
89bddce5 | 199 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 200 | return -EFAULT; |
3ec3b2fb | 201 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
202 | } |
203 | ||
204 | /** | |
205 | * move_addr_to_user - copy an address to user space | |
206 | * @kaddr: kernel space address | |
207 | * @klen: length of address in kernel | |
208 | * @uaddr: user space address | |
209 | * @ulen: pointer to user length field | |
210 | * | |
211 | * The value pointed to by ulen on entry is the buffer length available. | |
212 | * This is overwritten with the buffer space used. -EINVAL is returned | |
213 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
214 | * is returned if either the buffer or the length field are not | |
215 | * accessible. | |
216 | * After copying the data up to the limit the user specifies, the true | |
217 | * length of the data is written over the length limit the user | |
218 | * specified. Zero is returned for a success. | |
219 | */ | |
89bddce5 | 220 | |
230b1839 | 221 | int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, |
89bddce5 | 222 | int __user *ulen) |
1da177e4 LT |
223 | { |
224 | int err; | |
225 | int len; | |
226 | ||
89bddce5 SH |
227 | err = get_user(len, ulen); |
228 | if (err) | |
1da177e4 | 229 | return err; |
89bddce5 SH |
230 | if (len > klen) |
231 | len = klen; | |
230b1839 | 232 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 233 | return -EINVAL; |
89bddce5 | 234 | if (len) { |
d6fe3945 SG |
235 | if (audit_sockaddr(klen, kaddr)) |
236 | return -ENOMEM; | |
89bddce5 | 237 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
238 | return -EFAULT; |
239 | } | |
240 | /* | |
89bddce5 SH |
241 | * "fromlen shall refer to the value before truncation.." |
242 | * 1003.1g | |
1da177e4 LT |
243 | */ |
244 | return __put_user(klen, ulen); | |
245 | } | |
246 | ||
e18b890b | 247 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
248 | |
249 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
250 | { | |
251 | struct socket_alloc *ei; | |
89bddce5 | 252 | |
e94b1766 | 253 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
254 | if (!ei) |
255 | return NULL; | |
43815482 ED |
256 | ei->socket.wq = kmalloc(sizeof(struct socket_wq), GFP_KERNEL); |
257 | if (!ei->socket.wq) { | |
258 | kmem_cache_free(sock_inode_cachep, ei); | |
259 | return NULL; | |
260 | } | |
261 | init_waitqueue_head(&ei->socket.wq->wait); | |
262 | ei->socket.wq->fasync_list = NULL; | |
89bddce5 | 263 | |
1da177e4 LT |
264 | ei->socket.state = SS_UNCONNECTED; |
265 | ei->socket.flags = 0; | |
266 | ei->socket.ops = NULL; | |
267 | ei->socket.sk = NULL; | |
268 | ei->socket.file = NULL; | |
1da177e4 LT |
269 | |
270 | return &ei->vfs_inode; | |
271 | } | |
272 | ||
43815482 ED |
273 | |
274 | static void wq_free_rcu(struct rcu_head *head) | |
275 | { | |
276 | struct socket_wq *wq = container_of(head, struct socket_wq, rcu); | |
277 | ||
278 | kfree(wq); | |
279 | } | |
280 | ||
1da177e4 LT |
281 | static void sock_destroy_inode(struct inode *inode) |
282 | { | |
43815482 ED |
283 | struct socket_alloc *ei; |
284 | ||
285 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
286 | call_rcu(&ei->socket.wq->rcu, wq_free_rcu); | |
287 | kmem_cache_free(sock_inode_cachep, ei); | |
1da177e4 LT |
288 | } |
289 | ||
51cc5068 | 290 | static void init_once(void *foo) |
1da177e4 | 291 | { |
89bddce5 | 292 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 293 | |
a35afb83 | 294 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 295 | } |
89bddce5 | 296 | |
1da177e4 LT |
297 | static int init_inodecache(void) |
298 | { | |
299 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
300 | sizeof(struct socket_alloc), |
301 | 0, | |
302 | (SLAB_HWCACHE_ALIGN | | |
303 | SLAB_RECLAIM_ACCOUNT | | |
304 | SLAB_MEM_SPREAD), | |
20c2df83 | 305 | init_once); |
1da177e4 LT |
306 | if (sock_inode_cachep == NULL) |
307 | return -ENOMEM; | |
308 | return 0; | |
309 | } | |
310 | ||
b87221de | 311 | static const struct super_operations sockfs_ops = { |
1da177e4 LT |
312 | .alloc_inode = sock_alloc_inode, |
313 | .destroy_inode =sock_destroy_inode, | |
314 | .statfs = simple_statfs, | |
315 | }; | |
316 | ||
454e2398 | 317 | static int sockfs_get_sb(struct file_system_type *fs_type, |
89bddce5 SH |
318 | int flags, const char *dev_name, void *data, |
319 | struct vfsmount *mnt) | |
1da177e4 | 320 | { |
454e2398 DH |
321 | return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC, |
322 | mnt); | |
1da177e4 LT |
323 | } |
324 | ||
ba89966c | 325 | static struct vfsmount *sock_mnt __read_mostly; |
1da177e4 LT |
326 | |
327 | static struct file_system_type sock_fs_type = { | |
328 | .name = "sockfs", | |
329 | .get_sb = sockfs_get_sb, | |
330 | .kill_sb = kill_anon_super, | |
331 | }; | |
89bddce5 | 332 | |
c23fbb6b ED |
333 | /* |
334 | * sockfs_dname() is called from d_path(). | |
335 | */ | |
336 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
337 | { | |
338 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
339 | dentry->d_inode->i_ino); | |
340 | } | |
341 | ||
3ba13d17 | 342 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 343 | .d_dname = sockfs_dname, |
1da177e4 LT |
344 | }; |
345 | ||
346 | /* | |
347 | * Obtains the first available file descriptor and sets it up for use. | |
348 | * | |
39d8c1b6 DM |
349 | * These functions create file structures and maps them to fd space |
350 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
351 | * and file struct implicitly stored in sock->file. |
352 | * Note that another thread may close file descriptor before we return | |
353 | * from this function. We use the fact that now we do not refer | |
354 | * to socket after mapping. If one day we will need it, this | |
355 | * function will increment ref. count on file by 1. | |
356 | * | |
357 | * In any case returned fd MAY BE not valid! | |
358 | * This race condition is unavoidable | |
359 | * with shared fd spaces, we cannot solve it inside kernel, | |
360 | * but we take care of internal coherence yet. | |
361 | */ | |
362 | ||
7cbe66b6 | 363 | static int sock_alloc_file(struct socket *sock, struct file **f, int flags) |
1da177e4 | 364 | { |
7cbe66b6 | 365 | struct qstr name = { .name = "" }; |
2c48b9c4 | 366 | struct path path; |
7cbe66b6 | 367 | struct file *file; |
1da177e4 | 368 | int fd; |
1da177e4 | 369 | |
a677a039 | 370 | fd = get_unused_fd_flags(flags); |
7cbe66b6 AV |
371 | if (unlikely(fd < 0)) |
372 | return fd; | |
1da177e4 | 373 | |
2c48b9c4 AV |
374 | path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); |
375 | if (unlikely(!path.dentry)) { | |
7cbe66b6 | 376 | put_unused_fd(fd); |
39d8c1b6 | 377 | return -ENOMEM; |
7cbe66b6 | 378 | } |
2c48b9c4 | 379 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 380 | |
2c48b9c4 | 381 | path.dentry->d_op = &sockfs_dentry_operations; |
2c48b9c4 | 382 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 383 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 384 | |
2c48b9c4 | 385 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 386 | &socket_file_ops); |
cc3808f8 AV |
387 | if (unlikely(!file)) { |
388 | /* drop dentry, keep inode */ | |
389 | atomic_inc(&path.dentry->d_inode->i_count); | |
2c48b9c4 | 390 | path_put(&path); |
cc3808f8 AV |
391 | put_unused_fd(fd); |
392 | return -ENFILE; | |
393 | } | |
394 | ||
395 | sock->file = file; | |
77d27200 | 396 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
397 | file->f_pos = 0; |
398 | file->private_data = sock; | |
1da177e4 | 399 | |
7cbe66b6 AV |
400 | *f = file; |
401 | return fd; | |
39d8c1b6 DM |
402 | } |
403 | ||
a677a039 | 404 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
405 | { |
406 | struct file *newfile; | |
7cbe66b6 | 407 | int fd = sock_alloc_file(sock, &newfile, flags); |
39d8c1b6 | 408 | |
7cbe66b6 | 409 | if (likely(fd >= 0)) |
39d8c1b6 | 410 | fd_install(fd, newfile); |
7cbe66b6 | 411 | |
1da177e4 LT |
412 | return fd; |
413 | } | |
414 | ||
6cb153ca BL |
415 | static struct socket *sock_from_file(struct file *file, int *err) |
416 | { | |
6cb153ca BL |
417 | if (file->f_op == &socket_file_ops) |
418 | return file->private_data; /* set in sock_map_fd */ | |
419 | ||
23bb80d2 ED |
420 | *err = -ENOTSOCK; |
421 | return NULL; | |
6cb153ca BL |
422 | } |
423 | ||
1da177e4 LT |
424 | /** |
425 | * sockfd_lookup - Go from a file number to its socket slot | |
426 | * @fd: file handle | |
427 | * @err: pointer to an error code return | |
428 | * | |
429 | * The file handle passed in is locked and the socket it is bound | |
430 | * too is returned. If an error occurs the err pointer is overwritten | |
431 | * with a negative errno code and NULL is returned. The function checks | |
432 | * for both invalid handles and passing a handle which is not a socket. | |
433 | * | |
434 | * On a success the socket object pointer is returned. | |
435 | */ | |
436 | ||
437 | struct socket *sockfd_lookup(int fd, int *err) | |
438 | { | |
439 | struct file *file; | |
1da177e4 LT |
440 | struct socket *sock; |
441 | ||
89bddce5 SH |
442 | file = fget(fd); |
443 | if (!file) { | |
1da177e4 LT |
444 | *err = -EBADF; |
445 | return NULL; | |
446 | } | |
89bddce5 | 447 | |
6cb153ca BL |
448 | sock = sock_from_file(file, err); |
449 | if (!sock) | |
1da177e4 | 450 | fput(file); |
6cb153ca BL |
451 | return sock; |
452 | } | |
1da177e4 | 453 | |
6cb153ca BL |
454 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
455 | { | |
456 | struct file *file; | |
457 | struct socket *sock; | |
458 | ||
3672558c | 459 | *err = -EBADF; |
6cb153ca BL |
460 | file = fget_light(fd, fput_needed); |
461 | if (file) { | |
462 | sock = sock_from_file(file, err); | |
463 | if (sock) | |
464 | return sock; | |
465 | fput_light(file, *fput_needed); | |
1da177e4 | 466 | } |
6cb153ca | 467 | return NULL; |
1da177e4 LT |
468 | } |
469 | ||
470 | /** | |
471 | * sock_alloc - allocate a socket | |
89bddce5 | 472 | * |
1da177e4 LT |
473 | * Allocate a new inode and socket object. The two are bound together |
474 | * and initialised. The socket is then returned. If we are out of inodes | |
475 | * NULL is returned. | |
476 | */ | |
477 | ||
478 | static struct socket *sock_alloc(void) | |
479 | { | |
89bddce5 SH |
480 | struct inode *inode; |
481 | struct socket *sock; | |
1da177e4 LT |
482 | |
483 | inode = new_inode(sock_mnt->mnt_sb); | |
484 | if (!inode) | |
485 | return NULL; | |
486 | ||
487 | sock = SOCKET_I(inode); | |
488 | ||
29a020d3 | 489 | kmemcheck_annotate_bitfield(sock, type); |
89bddce5 | 490 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
491 | inode->i_uid = current_fsuid(); |
492 | inode->i_gid = current_fsgid(); | |
1da177e4 | 493 | |
4e69489a | 494 | percpu_add(sockets_in_use, 1); |
1da177e4 LT |
495 | return sock; |
496 | } | |
497 | ||
498 | /* | |
499 | * In theory you can't get an open on this inode, but /proc provides | |
500 | * a back door. Remember to keep it shut otherwise you'll let the | |
501 | * creepy crawlies in. | |
502 | */ | |
89bddce5 | 503 | |
1da177e4 LT |
504 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
505 | { | |
506 | return -ENXIO; | |
507 | } | |
508 | ||
4b6f5d20 | 509 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
510 | .owner = THIS_MODULE, |
511 | .open = sock_no_open, | |
512 | }; | |
513 | ||
514 | /** | |
515 | * sock_release - close a socket | |
516 | * @sock: socket to close | |
517 | * | |
518 | * The socket is released from the protocol stack if it has a release | |
519 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 520 | * an inode not a file. |
1da177e4 | 521 | */ |
89bddce5 | 522 | |
1da177e4 LT |
523 | void sock_release(struct socket *sock) |
524 | { | |
525 | if (sock->ops) { | |
526 | struct module *owner = sock->ops->owner; | |
527 | ||
528 | sock->ops->release(sock); | |
529 | sock->ops = NULL; | |
530 | module_put(owner); | |
531 | } | |
532 | ||
43815482 | 533 | if (sock->wq->fasync_list) |
1da177e4 LT |
534 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
535 | ||
4e69489a | 536 | percpu_sub(sockets_in_use, 1); |
1da177e4 LT |
537 | if (!sock->file) { |
538 | iput(SOCK_INODE(sock)); | |
539 | return; | |
540 | } | |
89bddce5 | 541 | sock->file = NULL; |
1da177e4 LT |
542 | } |
543 | ||
20d49473 PO |
544 | int sock_tx_timestamp(struct msghdr *msg, struct sock *sk, |
545 | union skb_shared_tx *shtx) | |
546 | { | |
547 | shtx->flags = 0; | |
548 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) | |
549 | shtx->hardware = 1; | |
550 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) | |
551 | shtx->software = 1; | |
552 | return 0; | |
553 | } | |
554 | EXPORT_SYMBOL(sock_tx_timestamp); | |
555 | ||
89bddce5 | 556 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
557 | struct msghdr *msg, size_t size) |
558 | { | |
559 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
560 | int err; | |
561 | ||
f8451725 HX |
562 | sock_update_classid(sock->sk); |
563 | ||
1da177e4 LT |
564 | si->sock = sock; |
565 | si->scm = NULL; | |
566 | si->msg = msg; | |
567 | si->size = size; | |
568 | ||
569 | err = security_socket_sendmsg(sock, msg, size); | |
570 | if (err) | |
571 | return err; | |
572 | ||
573 | return sock->ops->sendmsg(iocb, sock, msg, size); | |
574 | } | |
575 | ||
576 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
577 | { | |
578 | struct kiocb iocb; | |
579 | struct sock_iocb siocb; | |
580 | int ret; | |
581 | ||
582 | init_sync_kiocb(&iocb, NULL); | |
583 | iocb.private = &siocb; | |
584 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
585 | if (-EIOCBQUEUED == ret) | |
586 | ret = wait_on_sync_kiocb(&iocb); | |
587 | return ret; | |
588 | } | |
589 | ||
590 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
591 | struct kvec *vec, size_t num, size_t size) | |
592 | { | |
593 | mm_segment_t oldfs = get_fs(); | |
594 | int result; | |
595 | ||
596 | set_fs(KERNEL_DS); | |
597 | /* | |
598 | * the following is safe, since for compiler definitions of kvec and | |
599 | * iovec are identical, yielding the same in-core layout and alignment | |
600 | */ | |
89bddce5 | 601 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
602 | msg->msg_iovlen = num; |
603 | result = sock_sendmsg(sock, msg, size); | |
604 | set_fs(oldfs); | |
605 | return result; | |
606 | } | |
607 | ||
20d49473 PO |
608 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
609 | { | |
610 | if (kt.tv64) { | |
611 | *ts = ktime_to_timespec(kt); | |
612 | return 1; | |
613 | } else { | |
614 | return 0; | |
615 | } | |
616 | } | |
617 | ||
92f37fd2 ED |
618 | /* |
619 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
620 | */ | |
621 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
622 | struct sk_buff *skb) | |
623 | { | |
20d49473 PO |
624 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
625 | struct timespec ts[3]; | |
626 | int empty = 1; | |
627 | struct skb_shared_hwtstamps *shhwtstamps = | |
628 | skb_hwtstamps(skb); | |
629 | ||
630 | /* Race occurred between timestamp enabling and packet | |
631 | receiving. Fill in the current time for now. */ | |
632 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
633 | __net_timestamp(skb); | |
634 | ||
635 | if (need_software_tstamp) { | |
636 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
637 | struct timeval tv; | |
638 | skb_get_timestamp(skb, &tv); | |
639 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
640 | sizeof(tv), &tv); | |
641 | } else { | |
842509b8 | 642 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 643 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 644 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
645 | } |
646 | } | |
647 | ||
648 | ||
649 | memset(ts, 0, sizeof(ts)); | |
650 | if (skb->tstamp.tv64 && | |
651 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
652 | skb_get_timestampns(skb, ts + 0); | |
653 | empty = 0; | |
654 | } | |
655 | if (shhwtstamps) { | |
656 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
657 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
658 | empty = 0; | |
659 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
660 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
661 | empty = 0; | |
92f37fd2 | 662 | } |
20d49473 PO |
663 | if (!empty) |
664 | put_cmsg(msg, SOL_SOCKET, | |
665 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 ED |
666 | } |
667 | ||
7c81fd8b ACM |
668 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
669 | ||
3b885787 NH |
670 | inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) |
671 | { | |
672 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
673 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
674 | sizeof(__u32), &skb->dropcount); | |
675 | } | |
676 | ||
767dd033 | 677 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
678 | struct sk_buff *skb) |
679 | { | |
680 | sock_recv_timestamp(msg, sk, skb); | |
681 | sock_recv_drops(msg, sk, skb); | |
682 | } | |
767dd033 | 683 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 684 | |
a2e27255 ACM |
685 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
686 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 687 | { |
1da177e4 LT |
688 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
689 | ||
f8451725 HX |
690 | sock_update_classid(sock->sk); |
691 | ||
1da177e4 LT |
692 | si->sock = sock; |
693 | si->scm = NULL; | |
694 | si->msg = msg; | |
695 | si->size = size; | |
696 | si->flags = flags; | |
697 | ||
1da177e4 LT |
698 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
699 | } | |
700 | ||
a2e27255 ACM |
701 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
702 | struct msghdr *msg, size_t size, int flags) | |
703 | { | |
704 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
705 | ||
706 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
707 | } | |
708 | ||
89bddce5 | 709 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
710 | size_t size, int flags) |
711 | { | |
712 | struct kiocb iocb; | |
713 | struct sock_iocb siocb; | |
714 | int ret; | |
715 | ||
89bddce5 | 716 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
717 | iocb.private = &siocb; |
718 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
719 | if (-EIOCBQUEUED == ret) | |
720 | ret = wait_on_sync_kiocb(&iocb); | |
721 | return ret; | |
722 | } | |
723 | ||
a2e27255 ACM |
724 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
725 | size_t size, int flags) | |
726 | { | |
727 | struct kiocb iocb; | |
728 | struct sock_iocb siocb; | |
729 | int ret; | |
730 | ||
731 | init_sync_kiocb(&iocb, NULL); | |
732 | iocb.private = &siocb; | |
733 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
734 | if (-EIOCBQUEUED == ret) | |
735 | ret = wait_on_sync_kiocb(&iocb); | |
736 | return ret; | |
737 | } | |
738 | ||
89bddce5 SH |
739 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
740 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
741 | { |
742 | mm_segment_t oldfs = get_fs(); | |
743 | int result; | |
744 | ||
745 | set_fs(KERNEL_DS); | |
746 | /* | |
747 | * the following is safe, since for compiler definitions of kvec and | |
748 | * iovec are identical, yielding the same in-core layout and alignment | |
749 | */ | |
89bddce5 | 750 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
751 | result = sock_recvmsg(sock, msg, size, flags); |
752 | set_fs(oldfs); | |
753 | return result; | |
754 | } | |
755 | ||
756 | static void sock_aio_dtor(struct kiocb *iocb) | |
757 | { | |
758 | kfree(iocb->private); | |
759 | } | |
760 | ||
ce1d4d3e CH |
761 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
762 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 763 | { |
1da177e4 LT |
764 | struct socket *sock; |
765 | int flags; | |
766 | ||
ce1d4d3e CH |
767 | sock = file->private_data; |
768 | ||
769 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; | |
770 | if (more) | |
771 | flags |= MSG_MORE; | |
772 | ||
e6949583 | 773 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 774 | } |
1da177e4 | 775 | |
9c55e01c JA |
776 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
777 | struct pipe_inode_info *pipe, size_t len, | |
778 | unsigned int flags) | |
779 | { | |
780 | struct socket *sock = file->private_data; | |
781 | ||
997b37da RDC |
782 | if (unlikely(!sock->ops->splice_read)) |
783 | return -EINVAL; | |
784 | ||
f8451725 HX |
785 | sock_update_classid(sock->sk); |
786 | ||
9c55e01c JA |
787 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
788 | } | |
789 | ||
ce1d4d3e | 790 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 791 | struct sock_iocb *siocb) |
ce1d4d3e CH |
792 | { |
793 | if (!is_sync_kiocb(iocb)) { | |
794 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
795 | if (!siocb) | |
796 | return NULL; | |
1da177e4 LT |
797 | iocb->ki_dtor = sock_aio_dtor; |
798 | } | |
1da177e4 | 799 | |
ce1d4d3e | 800 | siocb->kiocb = iocb; |
ce1d4d3e CH |
801 | iocb->private = siocb; |
802 | return siocb; | |
1da177e4 LT |
803 | } |
804 | ||
ce1d4d3e | 805 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
806 | struct file *file, const struct iovec *iov, |
807 | unsigned long nr_segs) | |
ce1d4d3e CH |
808 | { |
809 | struct socket *sock = file->private_data; | |
810 | size_t size = 0; | |
811 | int i; | |
1da177e4 | 812 | |
89bddce5 SH |
813 | for (i = 0; i < nr_segs; i++) |
814 | size += iov[i].iov_len; | |
1da177e4 | 815 | |
ce1d4d3e CH |
816 | msg->msg_name = NULL; |
817 | msg->msg_namelen = 0; | |
818 | msg->msg_control = NULL; | |
819 | msg->msg_controllen = 0; | |
89bddce5 | 820 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
821 | msg->msg_iovlen = nr_segs; |
822 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
823 | ||
824 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
825 | } | |
826 | ||
027445c3 BP |
827 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
828 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
829 | { |
830 | struct sock_iocb siocb, *x; | |
831 | ||
1da177e4 LT |
832 | if (pos != 0) |
833 | return -ESPIPE; | |
027445c3 BP |
834 | |
835 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
836 | return 0; |
837 | ||
027445c3 BP |
838 | |
839 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
840 | if (!x) |
841 | return -ENOMEM; | |
027445c3 | 842 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
843 | } |
844 | ||
ce1d4d3e | 845 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
846 | struct file *file, const struct iovec *iov, |
847 | unsigned long nr_segs) | |
1da177e4 | 848 | { |
ce1d4d3e CH |
849 | struct socket *sock = file->private_data; |
850 | size_t size = 0; | |
851 | int i; | |
1da177e4 | 852 | |
89bddce5 SH |
853 | for (i = 0; i < nr_segs; i++) |
854 | size += iov[i].iov_len; | |
1da177e4 | 855 | |
ce1d4d3e CH |
856 | msg->msg_name = NULL; |
857 | msg->msg_namelen = 0; | |
858 | msg->msg_control = NULL; | |
859 | msg->msg_controllen = 0; | |
89bddce5 | 860 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
861 | msg->msg_iovlen = nr_segs; |
862 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
863 | if (sock->type == SOCK_SEQPACKET) | |
864 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 865 | |
ce1d4d3e | 866 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
867 | } |
868 | ||
027445c3 BP |
869 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
870 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
871 | { |
872 | struct sock_iocb siocb, *x; | |
1da177e4 | 873 | |
ce1d4d3e CH |
874 | if (pos != 0) |
875 | return -ESPIPE; | |
027445c3 | 876 | |
027445c3 | 877 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
878 | if (!x) |
879 | return -ENOMEM; | |
1da177e4 | 880 | |
027445c3 | 881 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
882 | } |
883 | ||
1da177e4 LT |
884 | /* |
885 | * Atomic setting of ioctl hooks to avoid race | |
886 | * with module unload. | |
887 | */ | |
888 | ||
4a3e2f71 | 889 | static DEFINE_MUTEX(br_ioctl_mutex); |
881d966b | 890 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL; |
1da177e4 | 891 | |
881d966b | 892 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 893 | { |
4a3e2f71 | 894 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 895 | br_ioctl_hook = hook; |
4a3e2f71 | 896 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 | 897 | } |
89bddce5 | 898 | |
1da177e4 LT |
899 | EXPORT_SYMBOL(brioctl_set); |
900 | ||
4a3e2f71 | 901 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 902 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 903 | |
881d966b | 904 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 905 | { |
4a3e2f71 | 906 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 907 | vlan_ioctl_hook = hook; |
4a3e2f71 | 908 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 909 | } |
89bddce5 | 910 | |
1da177e4 LT |
911 | EXPORT_SYMBOL(vlan_ioctl_set); |
912 | ||
4a3e2f71 | 913 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 914 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 915 | |
89bddce5 | 916 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 917 | { |
4a3e2f71 | 918 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 919 | dlci_ioctl_hook = hook; |
4a3e2f71 | 920 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 | 921 | } |
89bddce5 | 922 | |
1da177e4 LT |
923 | EXPORT_SYMBOL(dlci_ioctl_set); |
924 | ||
6b96018b AB |
925 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
926 | unsigned int cmd, unsigned long arg) | |
927 | { | |
928 | int err; | |
929 | void __user *argp = (void __user *)arg; | |
930 | ||
931 | err = sock->ops->ioctl(sock, cmd, arg); | |
932 | ||
933 | /* | |
934 | * If this ioctl is unknown try to hand it down | |
935 | * to the NIC driver. | |
936 | */ | |
937 | if (err == -ENOIOCTLCMD) | |
938 | err = dev_ioctl(net, cmd, argp); | |
939 | ||
940 | return err; | |
941 | } | |
942 | ||
1da177e4 LT |
943 | /* |
944 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
945 | * what to do with it - that's up to the protocol still. | |
946 | */ | |
947 | ||
948 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
949 | { | |
950 | struct socket *sock; | |
881d966b | 951 | struct sock *sk; |
1da177e4 LT |
952 | void __user *argp = (void __user *)arg; |
953 | int pid, err; | |
881d966b | 954 | struct net *net; |
1da177e4 | 955 | |
b69aee04 | 956 | sock = file->private_data; |
881d966b | 957 | sk = sock->sk; |
3b1e0a65 | 958 | net = sock_net(sk); |
1da177e4 | 959 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 960 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 961 | } else |
3d23e349 | 962 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 963 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 964 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 965 | } else |
3d23e349 | 966 | #endif |
89bddce5 | 967 | switch (cmd) { |
1da177e4 LT |
968 | case FIOSETOWN: |
969 | case SIOCSPGRP: | |
970 | err = -EFAULT; | |
971 | if (get_user(pid, (int __user *)argp)) | |
972 | break; | |
973 | err = f_setown(sock->file, pid, 1); | |
974 | break; | |
975 | case FIOGETOWN: | |
976 | case SIOCGPGRP: | |
609d7fa9 | 977 | err = put_user(f_getown(sock->file), |
89bddce5 | 978 | (int __user *)argp); |
1da177e4 LT |
979 | break; |
980 | case SIOCGIFBR: | |
981 | case SIOCSIFBR: | |
982 | case SIOCBRADDBR: | |
983 | case SIOCBRDELBR: | |
984 | err = -ENOPKG; | |
985 | if (!br_ioctl_hook) | |
986 | request_module("bridge"); | |
987 | ||
4a3e2f71 | 988 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 989 | if (br_ioctl_hook) |
881d966b | 990 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 991 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
992 | break; |
993 | case SIOCGIFVLAN: | |
994 | case SIOCSIFVLAN: | |
995 | err = -ENOPKG; | |
996 | if (!vlan_ioctl_hook) | |
997 | request_module("8021q"); | |
998 | ||
4a3e2f71 | 999 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1000 | if (vlan_ioctl_hook) |
881d966b | 1001 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1002 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1003 | break; |
1da177e4 LT |
1004 | case SIOCADDDLCI: |
1005 | case SIOCDELDLCI: | |
1006 | err = -ENOPKG; | |
1007 | if (!dlci_ioctl_hook) | |
1008 | request_module("dlci"); | |
1009 | ||
7512cbf6 PE |
1010 | mutex_lock(&dlci_ioctl_mutex); |
1011 | if (dlci_ioctl_hook) | |
1da177e4 | 1012 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1013 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1014 | break; |
1015 | default: | |
6b96018b | 1016 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1017 | break; |
89bddce5 | 1018 | } |
1da177e4 LT |
1019 | return err; |
1020 | } | |
1021 | ||
1022 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1023 | { | |
1024 | int err; | |
1025 | struct socket *sock = NULL; | |
89bddce5 | 1026 | |
1da177e4 LT |
1027 | err = security_socket_create(family, type, protocol, 1); |
1028 | if (err) | |
1029 | goto out; | |
1030 | ||
1031 | sock = sock_alloc(); | |
1032 | if (!sock) { | |
1033 | err = -ENOMEM; | |
1034 | goto out; | |
1035 | } | |
1036 | ||
1da177e4 | 1037 | sock->type = type; |
7420ed23 VY |
1038 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1039 | if (err) | |
1040 | goto out_release; | |
1041 | ||
1da177e4 LT |
1042 | out: |
1043 | *res = sock; | |
1044 | return err; | |
7420ed23 VY |
1045 | out_release: |
1046 | sock_release(sock); | |
1047 | sock = NULL; | |
1048 | goto out; | |
1da177e4 LT |
1049 | } |
1050 | ||
1051 | /* No kernel lock held - perfect */ | |
89bddce5 | 1052 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1053 | { |
1054 | struct socket *sock; | |
1055 | ||
1056 | /* | |
89bddce5 | 1057 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1058 | */ |
b69aee04 | 1059 | sock = file->private_data; |
1da177e4 LT |
1060 | return sock->ops->poll(file, sock, wait); |
1061 | } | |
1062 | ||
89bddce5 | 1063 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1064 | { |
b69aee04 | 1065 | struct socket *sock = file->private_data; |
1da177e4 LT |
1066 | |
1067 | return sock->ops->mmap(file, sock, vma); | |
1068 | } | |
1069 | ||
20380731 | 1070 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1071 | { |
1072 | /* | |
89bddce5 SH |
1073 | * It was possible the inode is NULL we were |
1074 | * closing an unfinished socket. | |
1da177e4 LT |
1075 | */ |
1076 | ||
89bddce5 | 1077 | if (!inode) { |
1da177e4 LT |
1078 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1079 | return 0; | |
1080 | } | |
1da177e4 LT |
1081 | sock_release(SOCKET_I(inode)); |
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * Update the socket async list | |
1087 | * | |
1088 | * Fasync_list locking strategy. | |
1089 | * | |
1090 | * 1. fasync_list is modified only under process context socket lock | |
1091 | * i.e. under semaphore. | |
1092 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1093 | * or under socket lock |
1da177e4 LT |
1094 | */ |
1095 | ||
1096 | static int sock_fasync(int fd, struct file *filp, int on) | |
1097 | { | |
989a2979 ED |
1098 | struct socket *sock = filp->private_data; |
1099 | struct sock *sk = sock->sk; | |
1da177e4 | 1100 | |
989a2979 | 1101 | if (sk == NULL) |
1da177e4 | 1102 | return -EINVAL; |
1da177e4 LT |
1103 | |
1104 | lock_sock(sk); | |
1105 | ||
43815482 | 1106 | fasync_helper(fd, filp, on, &sock->wq->fasync_list); |
1da177e4 | 1107 | |
43815482 | 1108 | if (!sock->wq->fasync_list) |
989a2979 ED |
1109 | sock_reset_flag(sk, SOCK_FASYNC); |
1110 | else | |
bcdce719 | 1111 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1112 | |
989a2979 | 1113 | release_sock(sk); |
1da177e4 LT |
1114 | return 0; |
1115 | } | |
1116 | ||
43815482 | 1117 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1118 | |
1119 | int sock_wake_async(struct socket *sock, int how, int band) | |
1120 | { | |
43815482 ED |
1121 | struct socket_wq *wq; |
1122 | ||
1123 | if (!sock) | |
1124 | return -1; | |
1125 | rcu_read_lock(); | |
1126 | wq = rcu_dereference(sock->wq); | |
1127 | if (!wq || !wq->fasync_list) { | |
1128 | rcu_read_unlock(); | |
1da177e4 | 1129 | return -1; |
43815482 | 1130 | } |
89bddce5 | 1131 | switch (how) { |
8d8ad9d7 | 1132 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1133 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1134 | break; | |
1135 | goto call_kill; | |
8d8ad9d7 | 1136 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1137 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1138 | break; | |
1139 | /* fall through */ | |
8d8ad9d7 | 1140 | case SOCK_WAKE_IO: |
89bddce5 | 1141 | call_kill: |
43815482 | 1142 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1143 | break; |
8d8ad9d7 | 1144 | case SOCK_WAKE_URG: |
43815482 | 1145 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1146 | } |
43815482 | 1147 | rcu_read_unlock(); |
1da177e4 LT |
1148 | return 0; |
1149 | } | |
1150 | ||
1b8d7ae4 | 1151 | static int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1152 | struct socket **res, int kern) |
1da177e4 LT |
1153 | { |
1154 | int err; | |
1155 | struct socket *sock; | |
55737fda | 1156 | const struct net_proto_family *pf; |
1da177e4 LT |
1157 | |
1158 | /* | |
89bddce5 | 1159 | * Check protocol is in range |
1da177e4 LT |
1160 | */ |
1161 | if (family < 0 || family >= NPROTO) | |
1162 | return -EAFNOSUPPORT; | |
1163 | if (type < 0 || type >= SOCK_MAX) | |
1164 | return -EINVAL; | |
1165 | ||
1166 | /* Compatibility. | |
1167 | ||
1168 | This uglymoron is moved from INET layer to here to avoid | |
1169 | deadlock in module load. | |
1170 | */ | |
1171 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1172 | static int warned; |
1da177e4 LT |
1173 | if (!warned) { |
1174 | warned = 1; | |
89bddce5 SH |
1175 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1176 | current->comm); | |
1da177e4 LT |
1177 | } |
1178 | family = PF_PACKET; | |
1179 | } | |
1180 | ||
1181 | err = security_socket_create(family, type, protocol, kern); | |
1182 | if (err) | |
1183 | return err; | |
89bddce5 | 1184 | |
55737fda SH |
1185 | /* |
1186 | * Allocate the socket and allow the family to set things up. if | |
1187 | * the protocol is 0, the family is instructed to select an appropriate | |
1188 | * default. | |
1189 | */ | |
1190 | sock = sock_alloc(); | |
1191 | if (!sock) { | |
1192 | if (net_ratelimit()) | |
1193 | printk(KERN_WARNING "socket: no more sockets\n"); | |
1194 | return -ENFILE; /* Not exactly a match, but its the | |
1195 | closest posix thing */ | |
1196 | } | |
1197 | ||
1198 | sock->type = type; | |
1199 | ||
95a5afca | 1200 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1201 | /* Attempt to load a protocol module if the find failed. |
1202 | * | |
1203 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1204 | * requested real, full-featured networking support upon configuration. |
1205 | * Otherwise module support will break! | |
1206 | */ | |
55737fda | 1207 | if (net_families[family] == NULL) |
89bddce5 | 1208 | request_module("net-pf-%d", family); |
1da177e4 LT |
1209 | #endif |
1210 | ||
55737fda SH |
1211 | rcu_read_lock(); |
1212 | pf = rcu_dereference(net_families[family]); | |
1213 | err = -EAFNOSUPPORT; | |
1214 | if (!pf) | |
1215 | goto out_release; | |
1da177e4 LT |
1216 | |
1217 | /* | |
1218 | * We will call the ->create function, that possibly is in a loadable | |
1219 | * module, so we have to bump that loadable module refcnt first. | |
1220 | */ | |
55737fda | 1221 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1222 | goto out_release; |
1223 | ||
55737fda SH |
1224 | /* Now protected by module ref count */ |
1225 | rcu_read_unlock(); | |
1226 | ||
3f378b68 | 1227 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1228 | if (err < 0) |
1da177e4 | 1229 | goto out_module_put; |
a79af59e | 1230 | |
1da177e4 LT |
1231 | /* |
1232 | * Now to bump the refcnt of the [loadable] module that owns this | |
1233 | * socket at sock_release time we decrement its refcnt. | |
1234 | */ | |
55737fda SH |
1235 | if (!try_module_get(sock->ops->owner)) |
1236 | goto out_module_busy; | |
1237 | ||
1da177e4 LT |
1238 | /* |
1239 | * Now that we're done with the ->create function, the [loadable] | |
1240 | * module can have its refcnt decremented | |
1241 | */ | |
55737fda | 1242 | module_put(pf->owner); |
7420ed23 VY |
1243 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1244 | if (err) | |
3b185525 | 1245 | goto out_sock_release; |
55737fda | 1246 | *res = sock; |
1da177e4 | 1247 | |
55737fda SH |
1248 | return 0; |
1249 | ||
1250 | out_module_busy: | |
1251 | err = -EAFNOSUPPORT; | |
1da177e4 | 1252 | out_module_put: |
55737fda SH |
1253 | sock->ops = NULL; |
1254 | module_put(pf->owner); | |
1255 | out_sock_release: | |
1da177e4 | 1256 | sock_release(sock); |
55737fda SH |
1257 | return err; |
1258 | ||
1259 | out_release: | |
1260 | rcu_read_unlock(); | |
1261 | goto out_sock_release; | |
1da177e4 LT |
1262 | } |
1263 | ||
1264 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1265 | { | |
1b8d7ae4 | 1266 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1270 | { | |
1b8d7ae4 | 1271 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 LT |
1272 | } |
1273 | ||
3e0fa65f | 1274 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1275 | { |
1276 | int retval; | |
1277 | struct socket *sock; | |
a677a039 UD |
1278 | int flags; |
1279 | ||
e38b36f3 UD |
1280 | /* Check the SOCK_* constants for consistency. */ |
1281 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1282 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1283 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1284 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1285 | ||
a677a039 | 1286 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1287 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1288 | return -EINVAL; |
1289 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1290 | |
aaca0bdc UD |
1291 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1292 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1293 | ||
1da177e4 LT |
1294 | retval = sock_create(family, type, protocol, &sock); |
1295 | if (retval < 0) | |
1296 | goto out; | |
1297 | ||
77d27200 | 1298 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1299 | if (retval < 0) |
1300 | goto out_release; | |
1301 | ||
1302 | out: | |
1303 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1304 | return retval; | |
1305 | ||
1306 | out_release: | |
1307 | sock_release(sock); | |
1308 | return retval; | |
1309 | } | |
1310 | ||
1311 | /* | |
1312 | * Create a pair of connected sockets. | |
1313 | */ | |
1314 | ||
3e0fa65f HC |
1315 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1316 | int __user *, usockvec) | |
1da177e4 LT |
1317 | { |
1318 | struct socket *sock1, *sock2; | |
1319 | int fd1, fd2, err; | |
db349509 | 1320 | struct file *newfile1, *newfile2; |
a677a039 UD |
1321 | int flags; |
1322 | ||
1323 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1324 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1325 | return -EINVAL; |
1326 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1327 | |
aaca0bdc UD |
1328 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1329 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1330 | ||
1da177e4 LT |
1331 | /* |
1332 | * Obtain the first socket and check if the underlying protocol | |
1333 | * supports the socketpair call. | |
1334 | */ | |
1335 | ||
1336 | err = sock_create(family, type, protocol, &sock1); | |
1337 | if (err < 0) | |
1338 | goto out; | |
1339 | ||
1340 | err = sock_create(family, type, protocol, &sock2); | |
1341 | if (err < 0) | |
1342 | goto out_release_1; | |
1343 | ||
1344 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1345 | if (err < 0) |
1da177e4 LT |
1346 | goto out_release_both; |
1347 | ||
7cbe66b6 | 1348 | fd1 = sock_alloc_file(sock1, &newfile1, flags); |
bf3c23d1 DM |
1349 | if (unlikely(fd1 < 0)) { |
1350 | err = fd1; | |
db349509 | 1351 | goto out_release_both; |
bf3c23d1 | 1352 | } |
1da177e4 | 1353 | |
7cbe66b6 | 1354 | fd2 = sock_alloc_file(sock2, &newfile2, flags); |
198de4d7 AV |
1355 | if (unlikely(fd2 < 0)) { |
1356 | err = fd2; | |
1357 | fput(newfile1); | |
1358 | put_unused_fd(fd1); | |
1359 | sock_release(sock2); | |
1360 | goto out; | |
db349509 AV |
1361 | } |
1362 | ||
157cf649 | 1363 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1364 | fd_install(fd1, newfile1); |
1365 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1366 | /* fd1 and fd2 may be already another descriptors. |
1367 | * Not kernel problem. | |
1368 | */ | |
1369 | ||
89bddce5 | 1370 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1371 | if (!err) |
1372 | err = put_user(fd2, &usockvec[1]); | |
1373 | if (!err) | |
1374 | return 0; | |
1375 | ||
1376 | sys_close(fd2); | |
1377 | sys_close(fd1); | |
1378 | return err; | |
1379 | ||
1da177e4 | 1380 | out_release_both: |
89bddce5 | 1381 | sock_release(sock2); |
1da177e4 | 1382 | out_release_1: |
89bddce5 | 1383 | sock_release(sock1); |
1da177e4 LT |
1384 | out: |
1385 | return err; | |
1386 | } | |
1387 | ||
1da177e4 LT |
1388 | /* |
1389 | * Bind a name to a socket. Nothing much to do here since it's | |
1390 | * the protocol's responsibility to handle the local address. | |
1391 | * | |
1392 | * We move the socket address to kernel space before we call | |
1393 | * the protocol layer (having also checked the address is ok). | |
1394 | */ | |
1395 | ||
20f37034 | 1396 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1397 | { |
1398 | struct socket *sock; | |
230b1839 | 1399 | struct sockaddr_storage address; |
6cb153ca | 1400 | int err, fput_needed; |
1da177e4 | 1401 | |
89bddce5 | 1402 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1403 | if (sock) { |
230b1839 | 1404 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
89bddce5 SH |
1405 | if (err >= 0) { |
1406 | err = security_socket_bind(sock, | |
230b1839 | 1407 | (struct sockaddr *)&address, |
89bddce5 | 1408 | addrlen); |
6cb153ca BL |
1409 | if (!err) |
1410 | err = sock->ops->bind(sock, | |
89bddce5 | 1411 | (struct sockaddr *) |
230b1839 | 1412 | &address, addrlen); |
1da177e4 | 1413 | } |
6cb153ca | 1414 | fput_light(sock->file, fput_needed); |
89bddce5 | 1415 | } |
1da177e4 LT |
1416 | return err; |
1417 | } | |
1418 | ||
1da177e4 LT |
1419 | /* |
1420 | * Perform a listen. Basically, we allow the protocol to do anything | |
1421 | * necessary for a listen, and if that works, we mark the socket as | |
1422 | * ready for listening. | |
1423 | */ | |
1424 | ||
3e0fa65f | 1425 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1426 | { |
1427 | struct socket *sock; | |
6cb153ca | 1428 | int err, fput_needed; |
b8e1f9b5 | 1429 | int somaxconn; |
89bddce5 SH |
1430 | |
1431 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1432 | if (sock) { | |
8efa6e93 | 1433 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
b8e1f9b5 PE |
1434 | if ((unsigned)backlog > somaxconn) |
1435 | backlog = somaxconn; | |
1da177e4 LT |
1436 | |
1437 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1438 | if (!err) |
1439 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1440 | |
6cb153ca | 1441 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1442 | } |
1443 | return err; | |
1444 | } | |
1445 | ||
1da177e4 LT |
1446 | /* |
1447 | * For accept, we attempt to create a new socket, set up the link | |
1448 | * with the client, wake up the client, then return the new | |
1449 | * connected fd. We collect the address of the connector in kernel | |
1450 | * space and move it to user at the very end. This is unclean because | |
1451 | * we open the socket then return an error. | |
1452 | * | |
1453 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1454 | * status to recvmsg. We need to add that support in a way thats | |
1455 | * clean when we restucture accept also. | |
1456 | */ | |
1457 | ||
20f37034 HC |
1458 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1459 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1460 | { |
1461 | struct socket *sock, *newsock; | |
39d8c1b6 | 1462 | struct file *newfile; |
6cb153ca | 1463 | int err, len, newfd, fput_needed; |
230b1839 | 1464 | struct sockaddr_storage address; |
1da177e4 | 1465 | |
77d27200 | 1466 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1467 | return -EINVAL; |
1468 | ||
1469 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1470 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1471 | ||
6cb153ca | 1472 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1473 | if (!sock) |
1474 | goto out; | |
1475 | ||
1476 | err = -ENFILE; | |
89bddce5 | 1477 | if (!(newsock = sock_alloc())) |
1da177e4 LT |
1478 | goto out_put; |
1479 | ||
1480 | newsock->type = sock->type; | |
1481 | newsock->ops = sock->ops; | |
1482 | ||
1da177e4 LT |
1483 | /* |
1484 | * We don't need try_module_get here, as the listening socket (sock) | |
1485 | * has the protocol module (sock->ops->owner) held. | |
1486 | */ | |
1487 | __module_get(newsock->ops->owner); | |
1488 | ||
7cbe66b6 | 1489 | newfd = sock_alloc_file(newsock, &newfile, flags); |
39d8c1b6 DM |
1490 | if (unlikely(newfd < 0)) { |
1491 | err = newfd; | |
9a1875e6 DM |
1492 | sock_release(newsock); |
1493 | goto out_put; | |
39d8c1b6 DM |
1494 | } |
1495 | ||
a79af59e FF |
1496 | err = security_socket_accept(sock, newsock); |
1497 | if (err) | |
39d8c1b6 | 1498 | goto out_fd; |
a79af59e | 1499 | |
1da177e4 LT |
1500 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1501 | if (err < 0) | |
39d8c1b6 | 1502 | goto out_fd; |
1da177e4 LT |
1503 | |
1504 | if (upeer_sockaddr) { | |
230b1839 | 1505 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1506 | &len, 2) < 0) { |
1da177e4 | 1507 | err = -ECONNABORTED; |
39d8c1b6 | 1508 | goto out_fd; |
1da177e4 | 1509 | } |
230b1839 YH |
1510 | err = move_addr_to_user((struct sockaddr *)&address, |
1511 | len, upeer_sockaddr, upeer_addrlen); | |
1da177e4 | 1512 | if (err < 0) |
39d8c1b6 | 1513 | goto out_fd; |
1da177e4 LT |
1514 | } |
1515 | ||
1516 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1517 | ||
39d8c1b6 DM |
1518 | fd_install(newfd, newfile); |
1519 | err = newfd; | |
1da177e4 | 1520 | |
1da177e4 | 1521 | out_put: |
6cb153ca | 1522 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1523 | out: |
1524 | return err; | |
39d8c1b6 | 1525 | out_fd: |
9606a216 | 1526 | fput(newfile); |
39d8c1b6 | 1527 | put_unused_fd(newfd); |
1da177e4 LT |
1528 | goto out_put; |
1529 | } | |
1530 | ||
20f37034 HC |
1531 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1532 | int __user *, upeer_addrlen) | |
aaca0bdc | 1533 | { |
de11defe | 1534 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1535 | } |
1536 | ||
1da177e4 LT |
1537 | /* |
1538 | * Attempt to connect to a socket with the server address. The address | |
1539 | * is in user space so we verify it is OK and move it to kernel space. | |
1540 | * | |
1541 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1542 | * break bindings | |
1543 | * | |
1544 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1545 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1546 | * include the -EINPROGRESS status for such sockets. | |
1547 | */ | |
1548 | ||
20f37034 HC |
1549 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1550 | int, addrlen) | |
1da177e4 LT |
1551 | { |
1552 | struct socket *sock; | |
230b1839 | 1553 | struct sockaddr_storage address; |
6cb153ca | 1554 | int err, fput_needed; |
1da177e4 | 1555 | |
6cb153ca | 1556 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1557 | if (!sock) |
1558 | goto out; | |
230b1839 | 1559 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
1da177e4 LT |
1560 | if (err < 0) |
1561 | goto out_put; | |
1562 | ||
89bddce5 | 1563 | err = |
230b1839 | 1564 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1565 | if (err) |
1566 | goto out_put; | |
1567 | ||
230b1839 | 1568 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1569 | sock->file->f_flags); |
1570 | out_put: | |
6cb153ca | 1571 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1572 | out: |
1573 | return err; | |
1574 | } | |
1575 | ||
1576 | /* | |
1577 | * Get the local address ('name') of a socket object. Move the obtained | |
1578 | * name to user space. | |
1579 | */ | |
1580 | ||
20f37034 HC |
1581 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1582 | int __user *, usockaddr_len) | |
1da177e4 LT |
1583 | { |
1584 | struct socket *sock; | |
230b1839 | 1585 | struct sockaddr_storage address; |
6cb153ca | 1586 | int len, err, fput_needed; |
89bddce5 | 1587 | |
6cb153ca | 1588 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1589 | if (!sock) |
1590 | goto out; | |
1591 | ||
1592 | err = security_socket_getsockname(sock); | |
1593 | if (err) | |
1594 | goto out_put; | |
1595 | ||
230b1839 | 1596 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1597 | if (err) |
1598 | goto out_put; | |
230b1839 | 1599 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1600 | |
1601 | out_put: | |
6cb153ca | 1602 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1603 | out: |
1604 | return err; | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * Get the remote address ('name') of a socket object. Move the obtained | |
1609 | * name to user space. | |
1610 | */ | |
1611 | ||
20f37034 HC |
1612 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1613 | int __user *, usockaddr_len) | |
1da177e4 LT |
1614 | { |
1615 | struct socket *sock; | |
230b1839 | 1616 | struct sockaddr_storage address; |
6cb153ca | 1617 | int len, err, fput_needed; |
1da177e4 | 1618 | |
89bddce5 SH |
1619 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1620 | if (sock != NULL) { | |
1da177e4 LT |
1621 | err = security_socket_getpeername(sock); |
1622 | if (err) { | |
6cb153ca | 1623 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1624 | return err; |
1625 | } | |
1626 | ||
89bddce5 | 1627 | err = |
230b1839 | 1628 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1629 | 1); |
1da177e4 | 1630 | if (!err) |
230b1839 | 1631 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
89bddce5 | 1632 | usockaddr_len); |
6cb153ca | 1633 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1634 | } |
1635 | return err; | |
1636 | } | |
1637 | ||
1638 | /* | |
1639 | * Send a datagram to a given address. We move the address into kernel | |
1640 | * space and check the user space data area is readable before invoking | |
1641 | * the protocol. | |
1642 | */ | |
1643 | ||
3e0fa65f HC |
1644 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
1645 | unsigned, flags, struct sockaddr __user *, addr, | |
1646 | int, addr_len) | |
1da177e4 LT |
1647 | { |
1648 | struct socket *sock; | |
230b1839 | 1649 | struct sockaddr_storage address; |
1da177e4 LT |
1650 | int err; |
1651 | struct msghdr msg; | |
1652 | struct iovec iov; | |
6cb153ca | 1653 | int fput_needed; |
6cb153ca | 1654 | |
de0fa95c PE |
1655 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1656 | if (!sock) | |
4387ff75 | 1657 | goto out; |
6cb153ca | 1658 | |
89bddce5 SH |
1659 | iov.iov_base = buff; |
1660 | iov.iov_len = len; | |
1661 | msg.msg_name = NULL; | |
1662 | msg.msg_iov = &iov; | |
1663 | msg.msg_iovlen = 1; | |
1664 | msg.msg_control = NULL; | |
1665 | msg.msg_controllen = 0; | |
1666 | msg.msg_namelen = 0; | |
6cb153ca | 1667 | if (addr) { |
230b1839 | 1668 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
1da177e4 LT |
1669 | if (err < 0) |
1670 | goto out_put; | |
230b1839 | 1671 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1672 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1673 | } |
1674 | if (sock->file->f_flags & O_NONBLOCK) | |
1675 | flags |= MSG_DONTWAIT; | |
1676 | msg.msg_flags = flags; | |
1677 | err = sock_sendmsg(sock, &msg, len); | |
1678 | ||
89bddce5 | 1679 | out_put: |
de0fa95c | 1680 | fput_light(sock->file, fput_needed); |
4387ff75 | 1681 | out: |
1da177e4 LT |
1682 | return err; |
1683 | } | |
1684 | ||
1685 | /* | |
89bddce5 | 1686 | * Send a datagram down a socket. |
1da177e4 LT |
1687 | */ |
1688 | ||
3e0fa65f HC |
1689 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
1690 | unsigned, flags) | |
1da177e4 LT |
1691 | { |
1692 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1693 | } | |
1694 | ||
1695 | /* | |
89bddce5 | 1696 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1697 | * sender. We verify the buffers are writable and if needed move the |
1698 | * sender address from kernel to user space. | |
1699 | */ | |
1700 | ||
3e0fa65f HC |
1701 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
1702 | unsigned, flags, struct sockaddr __user *, addr, | |
1703 | int __user *, addr_len) | |
1da177e4 LT |
1704 | { |
1705 | struct socket *sock; | |
1706 | struct iovec iov; | |
1707 | struct msghdr msg; | |
230b1839 | 1708 | struct sockaddr_storage address; |
89bddce5 | 1709 | int err, err2; |
6cb153ca BL |
1710 | int fput_needed; |
1711 | ||
de0fa95c | 1712 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1713 | if (!sock) |
de0fa95c | 1714 | goto out; |
1da177e4 | 1715 | |
89bddce5 SH |
1716 | msg.msg_control = NULL; |
1717 | msg.msg_controllen = 0; | |
1718 | msg.msg_iovlen = 1; | |
1719 | msg.msg_iov = &iov; | |
1720 | iov.iov_len = size; | |
1721 | iov.iov_base = ubuf; | |
230b1839 YH |
1722 | msg.msg_name = (struct sockaddr *)&address; |
1723 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1724 | if (sock->file->f_flags & O_NONBLOCK) |
1725 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1726 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1727 | |
89bddce5 | 1728 | if (err >= 0 && addr != NULL) { |
230b1839 YH |
1729 | err2 = move_addr_to_user((struct sockaddr *)&address, |
1730 | msg.msg_namelen, addr, addr_len); | |
89bddce5 SH |
1731 | if (err2 < 0) |
1732 | err = err2; | |
1da177e4 | 1733 | } |
de0fa95c PE |
1734 | |
1735 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1736 | out: |
1da177e4 LT |
1737 | return err; |
1738 | } | |
1739 | ||
1740 | /* | |
89bddce5 | 1741 | * Receive a datagram from a socket. |
1da177e4 LT |
1742 | */ |
1743 | ||
89bddce5 SH |
1744 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
1745 | unsigned flags) | |
1da177e4 LT |
1746 | { |
1747 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1748 | } | |
1749 | ||
1750 | /* | |
1751 | * Set a socket option. Because we don't know the option lengths we have | |
1752 | * to pass the user mode parameter for the protocols to sort out. | |
1753 | */ | |
1754 | ||
20f37034 HC |
1755 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1756 | char __user *, optval, int, optlen) | |
1da177e4 | 1757 | { |
6cb153ca | 1758 | int err, fput_needed; |
1da177e4 LT |
1759 | struct socket *sock; |
1760 | ||
1761 | if (optlen < 0) | |
1762 | return -EINVAL; | |
89bddce5 SH |
1763 | |
1764 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1765 | if (sock != NULL) { | |
1766 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1767 | if (err) |
1768 | goto out_put; | |
1da177e4 LT |
1769 | |
1770 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1771 | err = |
1772 | sock_setsockopt(sock, level, optname, optval, | |
1773 | optlen); | |
1da177e4 | 1774 | else |
89bddce5 SH |
1775 | err = |
1776 | sock->ops->setsockopt(sock, level, optname, optval, | |
1777 | optlen); | |
6cb153ca BL |
1778 | out_put: |
1779 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1780 | } |
1781 | return err; | |
1782 | } | |
1783 | ||
1784 | /* | |
1785 | * Get a socket option. Because we don't know the option lengths we have | |
1786 | * to pass a user mode parameter for the protocols to sort out. | |
1787 | */ | |
1788 | ||
20f37034 HC |
1789 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1790 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1791 | { |
6cb153ca | 1792 | int err, fput_needed; |
1da177e4 LT |
1793 | struct socket *sock; |
1794 | ||
89bddce5 SH |
1795 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1796 | if (sock != NULL) { | |
6cb153ca BL |
1797 | err = security_socket_getsockopt(sock, level, optname); |
1798 | if (err) | |
1799 | goto out_put; | |
1da177e4 LT |
1800 | |
1801 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1802 | err = |
1803 | sock_getsockopt(sock, level, optname, optval, | |
1804 | optlen); | |
1da177e4 | 1805 | else |
89bddce5 SH |
1806 | err = |
1807 | sock->ops->getsockopt(sock, level, optname, optval, | |
1808 | optlen); | |
6cb153ca BL |
1809 | out_put: |
1810 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1811 | } |
1812 | return err; | |
1813 | } | |
1814 | ||
1da177e4 LT |
1815 | /* |
1816 | * Shutdown a socket. | |
1817 | */ | |
1818 | ||
754fe8d2 | 1819 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1820 | { |
6cb153ca | 1821 | int err, fput_needed; |
1da177e4 LT |
1822 | struct socket *sock; |
1823 | ||
89bddce5 SH |
1824 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1825 | if (sock != NULL) { | |
1da177e4 | 1826 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1827 | if (!err) |
1828 | err = sock->ops->shutdown(sock, how); | |
1829 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1830 | } |
1831 | return err; | |
1832 | } | |
1833 | ||
89bddce5 | 1834 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1835 | * fields which are the same type (int / unsigned) on our platforms. |
1836 | */ | |
1837 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1838 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1839 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1840 | ||
1da177e4 LT |
1841 | /* |
1842 | * BSD sendmsg interface | |
1843 | */ | |
1844 | ||
3e0fa65f | 1845 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
1da177e4 | 1846 | { |
89bddce5 SH |
1847 | struct compat_msghdr __user *msg_compat = |
1848 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1849 | struct socket *sock; |
230b1839 | 1850 | struct sockaddr_storage address; |
1da177e4 | 1851 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1852 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1853 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1854 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 LT |
1855 | unsigned char *ctl_buf = ctl; |
1856 | struct msghdr msg_sys; | |
1857 | int err, ctl_len, iov_size, total_len; | |
6cb153ca | 1858 | int fput_needed; |
89bddce5 | 1859 | |
1da177e4 LT |
1860 | err = -EFAULT; |
1861 | if (MSG_CMSG_COMPAT & flags) { | |
1862 | if (get_compat_msghdr(&msg_sys, msg_compat)) | |
1863 | return -EFAULT; | |
89bddce5 SH |
1864 | } |
1865 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) | |
1da177e4 LT |
1866 | return -EFAULT; |
1867 | ||
6cb153ca | 1868 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
89bddce5 | 1869 | if (!sock) |
1da177e4 LT |
1870 | goto out; |
1871 | ||
1872 | /* do not move before msg_sys is valid */ | |
1873 | err = -EMSGSIZE; | |
1874 | if (msg_sys.msg_iovlen > UIO_MAXIOV) | |
1875 | goto out_put; | |
1876 | ||
89bddce5 | 1877 | /* Check whether to allocate the iovec area */ |
1da177e4 LT |
1878 | err = -ENOMEM; |
1879 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); | |
1880 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { | |
1881 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); | |
1882 | if (!iov) | |
1883 | goto out_put; | |
1884 | } | |
1885 | ||
1886 | /* This will also move the address data into kernel space */ | |
1887 | if (MSG_CMSG_COMPAT & flags) { | |
230b1839 YH |
1888 | err = verify_compat_iovec(&msg_sys, iov, |
1889 | (struct sockaddr *)&address, | |
1890 | VERIFY_READ); | |
1da177e4 | 1891 | } else |
230b1839 YH |
1892 | err = verify_iovec(&msg_sys, iov, |
1893 | (struct sockaddr *)&address, | |
1894 | VERIFY_READ); | |
89bddce5 | 1895 | if (err < 0) |
1da177e4 LT |
1896 | goto out_freeiov; |
1897 | total_len = err; | |
1898 | ||
1899 | err = -ENOBUFS; | |
1900 | ||
1901 | if (msg_sys.msg_controllen > INT_MAX) | |
1902 | goto out_freeiov; | |
89bddce5 | 1903 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1904 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 SH |
1905 | err = |
1906 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, | |
1907 | sizeof(ctl)); | |
1da177e4 LT |
1908 | if (err) |
1909 | goto out_freeiov; | |
1910 | ctl_buf = msg_sys.msg_control; | |
8920e8f9 | 1911 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1912 | } else if (ctl_len) { |
89bddce5 | 1913 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1914 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1915 | if (ctl_buf == NULL) |
1da177e4 LT |
1916 | goto out_freeiov; |
1917 | } | |
1918 | err = -EFAULT; | |
1919 | /* | |
1920 | * Careful! Before this, msg_sys.msg_control contains a user pointer. | |
1921 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted | |
1922 | * checking falls down on this. | |
1923 | */ | |
89bddce5 SH |
1924 | if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, |
1925 | ctl_len)) | |
1da177e4 LT |
1926 | goto out_freectl; |
1927 | msg_sys.msg_control = ctl_buf; | |
1928 | } | |
1929 | msg_sys.msg_flags = flags; | |
1930 | ||
1931 | if (sock->file->f_flags & O_NONBLOCK) | |
1932 | msg_sys.msg_flags |= MSG_DONTWAIT; | |
1933 | err = sock_sendmsg(sock, &msg_sys, total_len); | |
1934 | ||
1935 | out_freectl: | |
89bddce5 | 1936 | if (ctl_buf != ctl) |
1da177e4 LT |
1937 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
1938 | out_freeiov: | |
1939 | if (iov != iovstack) | |
1940 | sock_kfree_s(sock->sk, iov, iov_size); | |
1941 | out_put: | |
6cb153ca | 1942 | fput_light(sock->file, fput_needed); |
89bddce5 | 1943 | out: |
1da177e4 LT |
1944 | return err; |
1945 | } | |
1946 | ||
a2e27255 ACM |
1947 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
1948 | struct msghdr *msg_sys, unsigned flags, int nosec) | |
1da177e4 | 1949 | { |
89bddce5 SH |
1950 | struct compat_msghdr __user *msg_compat = |
1951 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1952 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 1953 | struct iovec *iov = iovstack; |
1da177e4 LT |
1954 | unsigned long cmsg_ptr; |
1955 | int err, iov_size, total_len, len; | |
1956 | ||
1957 | /* kernel mode address */ | |
230b1839 | 1958 | struct sockaddr_storage addr; |
1da177e4 LT |
1959 | |
1960 | /* user mode address pointers */ | |
1961 | struct sockaddr __user *uaddr; | |
1962 | int __user *uaddr_len; | |
89bddce5 | 1963 | |
1da177e4 | 1964 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 1965 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1966 | return -EFAULT; |
89bddce5 | 1967 | } |
a2e27255 | 1968 | else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 1969 | return -EFAULT; |
1da177e4 | 1970 | |
1da177e4 | 1971 | err = -EMSGSIZE; |
a2e27255 ACM |
1972 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
1973 | goto out; | |
89bddce5 SH |
1974 | |
1975 | /* Check whether to allocate the iovec area */ | |
1da177e4 | 1976 | err = -ENOMEM; |
a2e27255 ACM |
1977 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
1978 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { | |
1da177e4 LT |
1979 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
1980 | if (!iov) | |
a2e27255 | 1981 | goto out; |
1da177e4 LT |
1982 | } |
1983 | ||
1984 | /* | |
89bddce5 SH |
1985 | * Save the user-mode address (verify_iovec will change the |
1986 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 1987 | */ |
89bddce5 | 1988 | |
a2e27255 | 1989 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
1990 | uaddr_len = COMPAT_NAMELEN(msg); |
1991 | if (MSG_CMSG_COMPAT & flags) { | |
a2e27255 | 1992 | err = verify_compat_iovec(msg_sys, iov, |
230b1839 YH |
1993 | (struct sockaddr *)&addr, |
1994 | VERIFY_WRITE); | |
1da177e4 | 1995 | } else |
a2e27255 | 1996 | err = verify_iovec(msg_sys, iov, |
230b1839 YH |
1997 | (struct sockaddr *)&addr, |
1998 | VERIFY_WRITE); | |
1da177e4 LT |
1999 | if (err < 0) |
2000 | goto out_freeiov; | |
89bddce5 | 2001 | total_len = err; |
1da177e4 | 2002 | |
a2e27255 ACM |
2003 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2004 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2005 | |
1da177e4 LT |
2006 | if (sock->file->f_flags & O_NONBLOCK) |
2007 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2008 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2009 | total_len, flags); | |
1da177e4 LT |
2010 | if (err < 0) |
2011 | goto out_freeiov; | |
2012 | len = err; | |
2013 | ||
2014 | if (uaddr != NULL) { | |
230b1839 | 2015 | err = move_addr_to_user((struct sockaddr *)&addr, |
a2e27255 | 2016 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2017 | uaddr_len); |
1da177e4 LT |
2018 | if (err < 0) |
2019 | goto out_freeiov; | |
2020 | } | |
a2e27255 | 2021 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2022 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2023 | if (err) |
2024 | goto out_freeiov; | |
2025 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2026 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2027 | &msg_compat->msg_controllen); |
2028 | else | |
a2e27255 | 2029 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2030 | &msg->msg_controllen); |
2031 | if (err) | |
2032 | goto out_freeiov; | |
2033 | err = len; | |
2034 | ||
2035 | out_freeiov: | |
2036 | if (iov != iovstack) | |
2037 | sock_kfree_s(sock->sk, iov, iov_size); | |
a2e27255 ACM |
2038 | out: |
2039 | return err; | |
2040 | } | |
2041 | ||
2042 | /* | |
2043 | * BSD recvmsg interface | |
2044 | */ | |
2045 | ||
2046 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2047 | unsigned int, flags) | |
2048 | { | |
2049 | int fput_needed, err; | |
2050 | struct msghdr msg_sys; | |
2051 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2052 | ||
2053 | if (!sock) | |
2054 | goto out; | |
2055 | ||
2056 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2057 | ||
6cb153ca | 2058 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2059 | out: |
2060 | return err; | |
2061 | } | |
2062 | ||
a2e27255 ACM |
2063 | /* |
2064 | * Linux recvmmsg interface | |
2065 | */ | |
2066 | ||
2067 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2068 | unsigned int flags, struct timespec *timeout) | |
2069 | { | |
2070 | int fput_needed, err, datagrams; | |
2071 | struct socket *sock; | |
2072 | struct mmsghdr __user *entry; | |
d7256d0e | 2073 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2074 | struct msghdr msg_sys; |
2075 | struct timespec end_time; | |
2076 | ||
2077 | if (timeout && | |
2078 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2079 | timeout->tv_nsec)) | |
2080 | return -EINVAL; | |
2081 | ||
2082 | datagrams = 0; | |
2083 | ||
2084 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2085 | if (!sock) | |
2086 | return err; | |
2087 | ||
2088 | err = sock_error(sock->sk); | |
2089 | if (err) | |
2090 | goto out_put; | |
2091 | ||
2092 | entry = mmsg; | |
d7256d0e | 2093 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2094 | |
2095 | while (datagrams < vlen) { | |
2096 | /* | |
2097 | * No need to ask LSM for more than the first datagram. | |
2098 | */ | |
d7256d0e JMG |
2099 | if (MSG_CMSG_COMPAT & flags) { |
2100 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
2101 | &msg_sys, flags, datagrams); | |
2102 | if (err < 0) | |
2103 | break; | |
2104 | err = __put_user(err, &compat_entry->msg_len); | |
2105 | ++compat_entry; | |
2106 | } else { | |
2107 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
2108 | &msg_sys, flags, datagrams); | |
2109 | if (err < 0) | |
2110 | break; | |
2111 | err = put_user(err, &entry->msg_len); | |
2112 | ++entry; | |
2113 | } | |
2114 | ||
a2e27255 ACM |
2115 | if (err) |
2116 | break; | |
a2e27255 ACM |
2117 | ++datagrams; |
2118 | ||
71c5c159 BB |
2119 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2120 | if (flags & MSG_WAITFORONE) | |
2121 | flags |= MSG_DONTWAIT; | |
2122 | ||
a2e27255 ACM |
2123 | if (timeout) { |
2124 | ktime_get_ts(timeout); | |
2125 | *timeout = timespec_sub(end_time, *timeout); | |
2126 | if (timeout->tv_sec < 0) { | |
2127 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2128 | break; | |
2129 | } | |
2130 | ||
2131 | /* Timeout, return less than vlen datagrams */ | |
2132 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2133 | break; | |
2134 | } | |
2135 | ||
2136 | /* Out of band data, return right away */ | |
2137 | if (msg_sys.msg_flags & MSG_OOB) | |
2138 | break; | |
2139 | } | |
2140 | ||
2141 | out_put: | |
2142 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2143 | |
a2e27255 ACM |
2144 | if (err == 0) |
2145 | return datagrams; | |
2146 | ||
2147 | if (datagrams != 0) { | |
2148 | /* | |
2149 | * We may return less entries than requested (vlen) if the | |
2150 | * sock is non block and there aren't enough datagrams... | |
2151 | */ | |
2152 | if (err != -EAGAIN) { | |
2153 | /* | |
2154 | * ... or if recvmsg returns an error after we | |
2155 | * received some datagrams, where we record the | |
2156 | * error to return on the next call or if the | |
2157 | * app asks about it using getsockopt(SO_ERROR). | |
2158 | */ | |
2159 | sock->sk->sk_err = -err; | |
2160 | } | |
2161 | ||
2162 | return datagrams; | |
2163 | } | |
2164 | ||
2165 | return err; | |
2166 | } | |
2167 | ||
2168 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2169 | unsigned int, vlen, unsigned int, flags, | |
2170 | struct timespec __user *, timeout) | |
2171 | { | |
2172 | int datagrams; | |
2173 | struct timespec timeout_sys; | |
2174 | ||
2175 | if (!timeout) | |
2176 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2177 | ||
2178 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2179 | return -EFAULT; | |
2180 | ||
2181 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2182 | ||
2183 | if (datagrams > 0 && | |
2184 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2185 | datagrams = -EFAULT; | |
2186 | ||
2187 | return datagrams; | |
2188 | } | |
2189 | ||
2190 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2191 | /* Argument list sizes for sys_socketcall */ |
2192 | #define AL(x) ((x) * sizeof(unsigned long)) | |
a2e27255 | 2193 | static const unsigned char nargs[20] = { |
89bddce5 SH |
2194 | AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
2195 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), | |
aaca0bdc | 2196 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
a2e27255 | 2197 | AL(4),AL(5) |
89bddce5 SH |
2198 | }; |
2199 | ||
1da177e4 LT |
2200 | #undef AL |
2201 | ||
2202 | /* | |
89bddce5 | 2203 | * System call vectors. |
1da177e4 LT |
2204 | * |
2205 | * Argument checking cleaned up. Saved 20% in size. | |
2206 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2207 | * it is set by the callees. |
1da177e4 LT |
2208 | */ |
2209 | ||
3e0fa65f | 2210 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2211 | { |
2212 | unsigned long a[6]; | |
89bddce5 | 2213 | unsigned long a0, a1; |
1da177e4 | 2214 | int err; |
47379052 | 2215 | unsigned int len; |
1da177e4 | 2216 | |
a2e27255 | 2217 | if (call < 1 || call > SYS_RECVMMSG) |
1da177e4 LT |
2218 | return -EINVAL; |
2219 | ||
47379052 AV |
2220 | len = nargs[call]; |
2221 | if (len > sizeof(a)) | |
2222 | return -EINVAL; | |
2223 | ||
1da177e4 | 2224 | /* copy_from_user should be SMP safe. */ |
47379052 | 2225 | if (copy_from_user(a, args, len)) |
1da177e4 | 2226 | return -EFAULT; |
3ec3b2fb | 2227 | |
f3298dc4 | 2228 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2229 | |
89bddce5 SH |
2230 | a0 = a[0]; |
2231 | a1 = a[1]; | |
2232 | ||
2233 | switch (call) { | |
2234 | case SYS_SOCKET: | |
2235 | err = sys_socket(a0, a1, a[2]); | |
2236 | break; | |
2237 | case SYS_BIND: | |
2238 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2239 | break; | |
2240 | case SYS_CONNECT: | |
2241 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2242 | break; | |
2243 | case SYS_LISTEN: | |
2244 | err = sys_listen(a0, a1); | |
2245 | break; | |
2246 | case SYS_ACCEPT: | |
de11defe UD |
2247 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2248 | (int __user *)a[2], 0); | |
89bddce5 SH |
2249 | break; |
2250 | case SYS_GETSOCKNAME: | |
2251 | err = | |
2252 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2253 | (int __user *)a[2]); | |
2254 | break; | |
2255 | case SYS_GETPEERNAME: | |
2256 | err = | |
2257 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2258 | (int __user *)a[2]); | |
2259 | break; | |
2260 | case SYS_SOCKETPAIR: | |
2261 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2262 | break; | |
2263 | case SYS_SEND: | |
2264 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2265 | break; | |
2266 | case SYS_SENDTO: | |
2267 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2268 | (struct sockaddr __user *)a[4], a[5]); | |
2269 | break; | |
2270 | case SYS_RECV: | |
2271 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2272 | break; | |
2273 | case SYS_RECVFROM: | |
2274 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2275 | (struct sockaddr __user *)a[4], | |
2276 | (int __user *)a[5]); | |
2277 | break; | |
2278 | case SYS_SHUTDOWN: | |
2279 | err = sys_shutdown(a0, a1); | |
2280 | break; | |
2281 | case SYS_SETSOCKOPT: | |
2282 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2283 | break; | |
2284 | case SYS_GETSOCKOPT: | |
2285 | err = | |
2286 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2287 | (int __user *)a[4]); | |
2288 | break; | |
2289 | case SYS_SENDMSG: | |
2290 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2291 | break; | |
2292 | case SYS_RECVMSG: | |
2293 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2294 | break; | |
a2e27255 ACM |
2295 | case SYS_RECVMMSG: |
2296 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2297 | (struct timespec __user *)a[4]); | |
2298 | break; | |
de11defe UD |
2299 | case SYS_ACCEPT4: |
2300 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2301 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2302 | break; |
89bddce5 SH |
2303 | default: |
2304 | err = -EINVAL; | |
2305 | break; | |
1da177e4 LT |
2306 | } |
2307 | return err; | |
2308 | } | |
2309 | ||
89bddce5 | 2310 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2311 | |
55737fda SH |
2312 | /** |
2313 | * sock_register - add a socket protocol handler | |
2314 | * @ops: description of protocol | |
2315 | * | |
1da177e4 LT |
2316 | * This function is called by a protocol handler that wants to |
2317 | * advertise its address family, and have it linked into the | |
55737fda SH |
2318 | * socket interface. The value ops->family coresponds to the |
2319 | * socket system call protocol family. | |
1da177e4 | 2320 | */ |
f0fd27d4 | 2321 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2322 | { |
2323 | int err; | |
2324 | ||
2325 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2326 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2327 | NPROTO); | |
1da177e4 LT |
2328 | return -ENOBUFS; |
2329 | } | |
55737fda SH |
2330 | |
2331 | spin_lock(&net_family_lock); | |
2332 | if (net_families[ops->family]) | |
2333 | err = -EEXIST; | |
2334 | else { | |
89bddce5 | 2335 | net_families[ops->family] = ops; |
1da177e4 LT |
2336 | err = 0; |
2337 | } | |
55737fda SH |
2338 | spin_unlock(&net_family_lock); |
2339 | ||
89bddce5 | 2340 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2341 | return err; |
2342 | } | |
2343 | ||
55737fda SH |
2344 | /** |
2345 | * sock_unregister - remove a protocol handler | |
2346 | * @family: protocol family to remove | |
2347 | * | |
1da177e4 LT |
2348 | * This function is called by a protocol handler that wants to |
2349 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2350 | * new socket creation. |
2351 | * | |
2352 | * If protocol handler is a module, then it can use module reference | |
2353 | * counts to protect against new references. If protocol handler is not | |
2354 | * a module then it needs to provide its own protection in | |
2355 | * the ops->create routine. | |
1da177e4 | 2356 | */ |
f0fd27d4 | 2357 | void sock_unregister(int family) |
1da177e4 | 2358 | { |
f0fd27d4 | 2359 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2360 | |
55737fda | 2361 | spin_lock(&net_family_lock); |
89bddce5 | 2362 | net_families[family] = NULL; |
55737fda SH |
2363 | spin_unlock(&net_family_lock); |
2364 | ||
2365 | synchronize_rcu(); | |
2366 | ||
89bddce5 | 2367 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 LT |
2368 | } |
2369 | ||
77d76ea3 | 2370 | static int __init sock_init(void) |
1da177e4 LT |
2371 | { |
2372 | /* | |
89bddce5 | 2373 | * Initialize sock SLAB cache. |
1da177e4 | 2374 | */ |
89bddce5 | 2375 | |
1da177e4 LT |
2376 | sk_init(); |
2377 | ||
1da177e4 | 2378 | /* |
89bddce5 | 2379 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2380 | */ |
2381 | skb_init(); | |
1da177e4 LT |
2382 | |
2383 | /* | |
89bddce5 | 2384 | * Initialize the protocols module. |
1da177e4 LT |
2385 | */ |
2386 | ||
2387 | init_inodecache(); | |
2388 | register_filesystem(&sock_fs_type); | |
2389 | sock_mnt = kern_mount(&sock_fs_type); | |
77d76ea3 AK |
2390 | |
2391 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2392 | */ |
2393 | ||
2394 | #ifdef CONFIG_NETFILTER | |
2395 | netfilter_init(); | |
2396 | #endif | |
cbeb321a DM |
2397 | |
2398 | return 0; | |
1da177e4 LT |
2399 | } |
2400 | ||
77d76ea3 AK |
2401 | core_initcall(sock_init); /* early initcall */ |
2402 | ||
1da177e4 LT |
2403 | #ifdef CONFIG_PROC_FS |
2404 | void socket_seq_show(struct seq_file *seq) | |
2405 | { | |
2406 | int cpu; | |
2407 | int counter = 0; | |
2408 | ||
6f912042 | 2409 | for_each_possible_cpu(cpu) |
89bddce5 | 2410 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2411 | |
2412 | /* It can be negative, by the way. 8) */ | |
2413 | if (counter < 0) | |
2414 | counter = 0; | |
2415 | ||
2416 | seq_printf(seq, "sockets: used %d\n", counter); | |
2417 | } | |
89bddce5 | 2418 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2419 | |
89bbfc95 | 2420 | #ifdef CONFIG_COMPAT |
6b96018b AB |
2421 | static int do_siocgstamp(struct net *net, struct socket *sock, |
2422 | unsigned int cmd, struct compat_timeval __user *up) | |
7a229387 | 2423 | { |
7a229387 AB |
2424 | mm_segment_t old_fs = get_fs(); |
2425 | struct timeval ktv; | |
2426 | int err; | |
2427 | ||
2428 | set_fs(KERNEL_DS); | |
6b96018b | 2429 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 AB |
2430 | set_fs(old_fs); |
2431 | if (!err) { | |
2432 | err = put_user(ktv.tv_sec, &up->tv_sec); | |
2433 | err |= __put_user(ktv.tv_usec, &up->tv_usec); | |
2434 | } | |
2435 | return err; | |
2436 | } | |
2437 | ||
6b96018b AB |
2438 | static int do_siocgstampns(struct net *net, struct socket *sock, |
2439 | unsigned int cmd, struct compat_timespec __user *up) | |
7a229387 | 2440 | { |
7a229387 AB |
2441 | mm_segment_t old_fs = get_fs(); |
2442 | struct timespec kts; | |
2443 | int err; | |
2444 | ||
2445 | set_fs(KERNEL_DS); | |
6b96018b | 2446 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 AB |
2447 | set_fs(old_fs); |
2448 | if (!err) { | |
2449 | err = put_user(kts.tv_sec, &up->tv_sec); | |
2450 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); | |
2451 | } | |
2452 | return err; | |
2453 | } | |
2454 | ||
6b96018b | 2455 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2456 | { |
2457 | struct ifreq __user *uifr; | |
2458 | int err; | |
2459 | ||
2460 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2461 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2462 | return -EFAULT; |
2463 | ||
6b96018b | 2464 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2465 | if (err) |
2466 | return err; | |
2467 | ||
6b96018b | 2468 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2469 | return -EFAULT; |
2470 | ||
2471 | return 0; | |
2472 | } | |
2473 | ||
6b96018b | 2474 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2475 | { |
6b96018b | 2476 | struct compat_ifconf ifc32; |
7a229387 AB |
2477 | struct ifconf ifc; |
2478 | struct ifconf __user *uifc; | |
6b96018b | 2479 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2480 | struct ifreq __user *ifr; |
2481 | unsigned int i, j; | |
2482 | int err; | |
2483 | ||
6b96018b | 2484 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2485 | return -EFAULT; |
2486 | ||
2487 | if (ifc32.ifcbuf == 0) { | |
2488 | ifc32.ifc_len = 0; | |
2489 | ifc.ifc_len = 0; | |
2490 | ifc.ifc_req = NULL; | |
2491 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2492 | } else { | |
6b96018b | 2493 | size_t len =((ifc32.ifc_len / sizeof (struct compat_ifreq)) + 1) * |
7a229387 AB |
2494 | sizeof (struct ifreq); |
2495 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); | |
2496 | ifc.ifc_len = len; | |
2497 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2498 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
6b96018b AB |
2499 | for (i = 0; i < ifc32.ifc_len; i += sizeof (struct compat_ifreq)) { |
2500 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2501 | return -EFAULT; |
2502 | ifr++; | |
2503 | ifr32++; | |
2504 | } | |
2505 | } | |
2506 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2507 | return -EFAULT; | |
2508 | ||
6b96018b | 2509 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2510 | if (err) |
2511 | return err; | |
2512 | ||
2513 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2514 | return -EFAULT; | |
2515 | ||
2516 | ifr = ifc.ifc_req; | |
2517 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2518 | for (i = 0, j = 0; | |
6b96018b AB |
2519 | i + sizeof (struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2520 | i += sizeof (struct compat_ifreq), j += sizeof (struct ifreq)) { | |
2521 | if (copy_in_user(ifr32, ifr, sizeof (struct compat_ifreq))) | |
7a229387 AB |
2522 | return -EFAULT; |
2523 | ifr32++; | |
2524 | ifr++; | |
2525 | } | |
2526 | ||
2527 | if (ifc32.ifcbuf == 0) { | |
2528 | /* Translate from 64-bit structure multiple to | |
2529 | * a 32-bit one. | |
2530 | */ | |
2531 | i = ifc.ifc_len; | |
6b96018b | 2532 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2533 | ifc32.ifc_len = i; |
2534 | } else { | |
2535 | ifc32.ifc_len = i; | |
2536 | } | |
6b96018b | 2537 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2538 | return -EFAULT; |
2539 | ||
2540 | return 0; | |
2541 | } | |
2542 | ||
6b96018b | 2543 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 AB |
2544 | { |
2545 | struct ifreq __user *ifr; | |
7a229387 AB |
2546 | u32 data; |
2547 | void __user *datap; | |
2548 | ||
2549 | ifr = compat_alloc_user_space(sizeof(*ifr)); | |
7a229387 AB |
2550 | |
2551 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2552 | return -EFAULT; | |
2553 | ||
2554 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2555 | return -EFAULT; | |
2556 | ||
2557 | datap = compat_ptr(data); | |
2558 | if (put_user(datap, &ifr->ifr_ifru.ifru_data)) | |
2559 | return -EFAULT; | |
2560 | ||
6b96018b | 2561 | return dev_ioctl(net, SIOCETHTOOL, ifr); |
7a229387 AB |
2562 | } |
2563 | ||
7a50a240 AB |
2564 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2565 | { | |
2566 | void __user *uptr; | |
2567 | compat_uptr_t uptr32; | |
2568 | struct ifreq __user *uifr; | |
2569 | ||
2570 | uifr = compat_alloc_user_space(sizeof (*uifr)); | |
2571 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2572 | return -EFAULT; | |
2573 | ||
2574 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2575 | return -EFAULT; | |
2576 | ||
2577 | uptr = compat_ptr(uptr32); | |
2578 | ||
2579 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2580 | return -EFAULT; | |
2581 | ||
2582 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2583 | } | |
2584 | ||
6b96018b AB |
2585 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2586 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2587 | { |
2588 | struct ifreq kifr; | |
2589 | struct ifreq __user *uifr; | |
7a229387 AB |
2590 | mm_segment_t old_fs; |
2591 | int err; | |
2592 | u32 data; | |
2593 | void __user *datap; | |
2594 | ||
2595 | switch (cmd) { | |
2596 | case SIOCBONDENSLAVE: | |
2597 | case SIOCBONDRELEASE: | |
2598 | case SIOCBONDSETHWADDR: | |
2599 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2600 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2601 | return -EFAULT; |
2602 | ||
2603 | old_fs = get_fs(); | |
2604 | set_fs (KERNEL_DS); | |
6b96018b | 2605 | err = dev_ioctl(net, cmd, &kifr); |
7a229387 AB |
2606 | set_fs (old_fs); |
2607 | ||
2608 | return err; | |
2609 | case SIOCBONDSLAVEINFOQUERY: | |
2610 | case SIOCBONDINFOQUERY: | |
2611 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2612 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2613 | return -EFAULT; | |
2614 | ||
2615 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2616 | return -EFAULT; | |
2617 | ||
2618 | datap = compat_ptr(data); | |
2619 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2620 | return -EFAULT; | |
2621 | ||
6b96018b | 2622 | return dev_ioctl(net, cmd, uifr); |
7a229387 AB |
2623 | default: |
2624 | return -EINVAL; | |
ccbd6a5a | 2625 | } |
7a229387 AB |
2626 | } |
2627 | ||
6b96018b AB |
2628 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2629 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2630 | { |
2631 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2632 | char tmp_buf[IFNAMSIZ]; |
2633 | void __user *data64; | |
2634 | u32 data32; | |
2635 | ||
2636 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2637 | IFNAMSIZ)) | |
2638 | return -EFAULT; | |
2639 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2640 | return -EFAULT; | |
2641 | data64 = compat_ptr(data32); | |
2642 | ||
2643 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2644 | ||
2645 | /* Don't check these user accesses, just let that get trapped | |
2646 | * in the ioctl handler instead. | |
2647 | */ | |
2648 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2649 | IFNAMSIZ)) | |
2650 | return -EFAULT; | |
2651 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2652 | return -EFAULT; | |
2653 | ||
6b96018b | 2654 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2655 | } |
2656 | ||
6b96018b AB |
2657 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2658 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2659 | { |
a2116ed2 | 2660 | struct ifreq __user *uifr; |
7a229387 AB |
2661 | int err; |
2662 | ||
a2116ed2 AB |
2663 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2664 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2665 | return -EFAULT; | |
2666 | ||
2667 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2668 | ||
7a229387 AB |
2669 | if (!err) { |
2670 | switch (cmd) { | |
2671 | case SIOCGIFFLAGS: | |
2672 | case SIOCGIFMETRIC: | |
2673 | case SIOCGIFMTU: | |
2674 | case SIOCGIFMEM: | |
2675 | case SIOCGIFHWADDR: | |
2676 | case SIOCGIFINDEX: | |
2677 | case SIOCGIFADDR: | |
2678 | case SIOCGIFBRDADDR: | |
2679 | case SIOCGIFDSTADDR: | |
2680 | case SIOCGIFNETMASK: | |
fab2532b | 2681 | case SIOCGIFPFLAGS: |
7a229387 | 2682 | case SIOCGIFTXQLEN: |
fab2532b AB |
2683 | case SIOCGMIIPHY: |
2684 | case SIOCGMIIREG: | |
a2116ed2 | 2685 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2686 | err = -EFAULT; |
2687 | break; | |
2688 | } | |
2689 | } | |
2690 | return err; | |
2691 | } | |
2692 | ||
a2116ed2 AB |
2693 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2694 | struct compat_ifreq __user *uifr32) | |
2695 | { | |
2696 | struct ifreq ifr; | |
2697 | struct compat_ifmap __user *uifmap32; | |
2698 | mm_segment_t old_fs; | |
2699 | int err; | |
2700 | ||
2701 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2702 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
2703 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2704 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2705 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2706 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2707 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2708 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
2709 | if (err) | |
2710 | return -EFAULT; | |
2711 | ||
2712 | old_fs = get_fs(); | |
2713 | set_fs (KERNEL_DS); | |
2714 | err = dev_ioctl(net, cmd, (void __user *)&ifr); | |
2715 | set_fs (old_fs); | |
2716 | ||
2717 | if (cmd == SIOCGIFMAP && !err) { | |
2718 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
2719 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2720 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2721 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2722 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2723 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2724 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
2725 | if (err) | |
2726 | err = -EFAULT; | |
2727 | } | |
2728 | return err; | |
2729 | } | |
2730 | ||
2731 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
2732 | { | |
2733 | void __user *uptr; | |
2734 | compat_uptr_t uptr32; | |
2735 | struct ifreq __user *uifr; | |
2736 | ||
2737 | uifr = compat_alloc_user_space(sizeof (*uifr)); | |
2738 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2739 | return -EFAULT; | |
2740 | ||
2741 | if (get_user(uptr32, &uifr32->ifr_data)) | |
2742 | return -EFAULT; | |
2743 | ||
2744 | uptr = compat_ptr(uptr32); | |
2745 | ||
2746 | if (put_user(uptr, &uifr->ifr_data)) | |
2747 | return -EFAULT; | |
2748 | ||
2749 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
2750 | } | |
2751 | ||
7a229387 AB |
2752 | struct rtentry32 { |
2753 | u32 rt_pad1; | |
2754 | struct sockaddr rt_dst; /* target address */ | |
2755 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
2756 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
2757 | unsigned short rt_flags; | |
2758 | short rt_pad2; | |
2759 | u32 rt_pad3; | |
2760 | unsigned char rt_tos; | |
2761 | unsigned char rt_class; | |
2762 | short rt_pad4; | |
2763 | short rt_metric; /* +1 for binary compatibility! */ | |
2764 | /* char * */ u32 rt_dev; /* forcing the device at add */ | |
2765 | u32 rt_mtu; /* per route MTU/Window */ | |
2766 | u32 rt_window; /* Window clamping */ | |
2767 | unsigned short rt_irtt; /* Initial RTT */ | |
2768 | }; | |
2769 | ||
2770 | struct in6_rtmsg32 { | |
2771 | struct in6_addr rtmsg_dst; | |
2772 | struct in6_addr rtmsg_src; | |
2773 | struct in6_addr rtmsg_gateway; | |
2774 | u32 rtmsg_type; | |
2775 | u16 rtmsg_dst_len; | |
2776 | u16 rtmsg_src_len; | |
2777 | u32 rtmsg_metric; | |
2778 | u32 rtmsg_info; | |
2779 | u32 rtmsg_flags; | |
2780 | s32 rtmsg_ifindex; | |
2781 | }; | |
2782 | ||
6b96018b AB |
2783 | static int routing_ioctl(struct net *net, struct socket *sock, |
2784 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
2785 | { |
2786 | int ret; | |
2787 | void *r = NULL; | |
2788 | struct in6_rtmsg r6; | |
2789 | struct rtentry r4; | |
2790 | char devname[16]; | |
2791 | u32 rtdev; | |
2792 | mm_segment_t old_fs = get_fs(); | |
2793 | ||
6b96018b AB |
2794 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
2795 | struct in6_rtmsg32 __user *ur6 = argp; | |
7a229387 AB |
2796 | ret = copy_from_user (&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
2797 | 3 * sizeof(struct in6_addr)); | |
2798 | ret |= __get_user (r6.rtmsg_type, &(ur6->rtmsg_type)); | |
2799 | ret |= __get_user (r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
2800 | ret |= __get_user (r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
2801 | ret |= __get_user (r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
2802 | ret |= __get_user (r6.rtmsg_info, &(ur6->rtmsg_info)); | |
2803 | ret |= __get_user (r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
2804 | ret |= __get_user (r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
2805 | ||
2806 | r = (void *) &r6; | |
2807 | } else { /* ipv4 */ | |
6b96018b | 2808 | struct rtentry32 __user *ur4 = argp; |
7a229387 AB |
2809 | ret = copy_from_user (&r4.rt_dst, &(ur4->rt_dst), |
2810 | 3 * sizeof(struct sockaddr)); | |
2811 | ret |= __get_user (r4.rt_flags, &(ur4->rt_flags)); | |
2812 | ret |= __get_user (r4.rt_metric, &(ur4->rt_metric)); | |
2813 | ret |= __get_user (r4.rt_mtu, &(ur4->rt_mtu)); | |
2814 | ret |= __get_user (r4.rt_window, &(ur4->rt_window)); | |
2815 | ret |= __get_user (r4.rt_irtt, &(ur4->rt_irtt)); | |
2816 | ret |= __get_user (rtdev, &(ur4->rt_dev)); | |
2817 | if (rtdev) { | |
2818 | ret |= copy_from_user (devname, compat_ptr(rtdev), 15); | |
2819 | r4.rt_dev = devname; devname[15] = 0; | |
2820 | } else | |
2821 | r4.rt_dev = NULL; | |
2822 | ||
2823 | r = (void *) &r4; | |
2824 | } | |
2825 | ||
2826 | if (ret) { | |
2827 | ret = -EFAULT; | |
2828 | goto out; | |
2829 | } | |
2830 | ||
2831 | set_fs (KERNEL_DS); | |
6b96018b | 2832 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
7a229387 AB |
2833 | set_fs (old_fs); |
2834 | ||
2835 | out: | |
7a229387 AB |
2836 | return ret; |
2837 | } | |
2838 | ||
2839 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
2840 | * for some operations; this forces use of the newer bridge-utils that | |
2841 | * use compatiable ioctls | |
2842 | */ | |
6b96018b | 2843 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 2844 | { |
6b96018b | 2845 | compat_ulong_t tmp; |
7a229387 | 2846 | |
6b96018b | 2847 | if (get_user(tmp, argp)) |
7a229387 AB |
2848 | return -EFAULT; |
2849 | if (tmp == BRCTL_GET_VERSION) | |
2850 | return BRCTL_VERSION + 1; | |
2851 | return -EINVAL; | |
2852 | } | |
2853 | ||
6b96018b AB |
2854 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
2855 | unsigned int cmd, unsigned long arg) | |
2856 | { | |
2857 | void __user *argp = compat_ptr(arg); | |
2858 | struct sock *sk = sock->sk; | |
2859 | struct net *net = sock_net(sk); | |
7a229387 | 2860 | |
6b96018b AB |
2861 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
2862 | return siocdevprivate_ioctl(net, cmd, argp); | |
2863 | ||
2864 | switch (cmd) { | |
2865 | case SIOCSIFBR: | |
2866 | case SIOCGIFBR: | |
2867 | return old_bridge_ioctl(argp); | |
2868 | case SIOCGIFNAME: | |
2869 | return dev_ifname32(net, argp); | |
2870 | case SIOCGIFCONF: | |
2871 | return dev_ifconf(net, argp); | |
2872 | case SIOCETHTOOL: | |
2873 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
2874 | case SIOCWANDEV: |
2875 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
2876 | case SIOCGIFMAP: |
2877 | case SIOCSIFMAP: | |
2878 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
2879 | case SIOCBONDENSLAVE: |
2880 | case SIOCBONDRELEASE: | |
2881 | case SIOCBONDSETHWADDR: | |
2882 | case SIOCBONDSLAVEINFOQUERY: | |
2883 | case SIOCBONDINFOQUERY: | |
2884 | case SIOCBONDCHANGEACTIVE: | |
2885 | return bond_ioctl(net, cmd, argp); | |
2886 | case SIOCADDRT: | |
2887 | case SIOCDELRT: | |
2888 | return routing_ioctl(net, sock, cmd, argp); | |
2889 | case SIOCGSTAMP: | |
2890 | return do_siocgstamp(net, sock, cmd, argp); | |
2891 | case SIOCGSTAMPNS: | |
2892 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
2893 | case SIOCSHWTSTAMP: |
2894 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
2895 | |
2896 | case FIOSETOWN: | |
2897 | case SIOCSPGRP: | |
2898 | case FIOGETOWN: | |
2899 | case SIOCGPGRP: | |
2900 | case SIOCBRADDBR: | |
2901 | case SIOCBRDELBR: | |
2902 | case SIOCGIFVLAN: | |
2903 | case SIOCSIFVLAN: | |
2904 | case SIOCADDDLCI: | |
2905 | case SIOCDELDLCI: | |
2906 | return sock_ioctl(file, cmd, arg); | |
2907 | ||
2908 | case SIOCGIFFLAGS: | |
2909 | case SIOCSIFFLAGS: | |
2910 | case SIOCGIFMETRIC: | |
2911 | case SIOCSIFMETRIC: | |
2912 | case SIOCGIFMTU: | |
2913 | case SIOCSIFMTU: | |
2914 | case SIOCGIFMEM: | |
2915 | case SIOCSIFMEM: | |
2916 | case SIOCGIFHWADDR: | |
2917 | case SIOCSIFHWADDR: | |
2918 | case SIOCADDMULTI: | |
2919 | case SIOCDELMULTI: | |
2920 | case SIOCGIFINDEX: | |
6b96018b AB |
2921 | case SIOCGIFADDR: |
2922 | case SIOCSIFADDR: | |
2923 | case SIOCSIFHWBROADCAST: | |
6b96018b | 2924 | case SIOCDIFADDR: |
6b96018b AB |
2925 | case SIOCGIFBRDADDR: |
2926 | case SIOCSIFBRDADDR: | |
2927 | case SIOCGIFDSTADDR: | |
2928 | case SIOCSIFDSTADDR: | |
2929 | case SIOCGIFNETMASK: | |
2930 | case SIOCSIFNETMASK: | |
2931 | case SIOCSIFPFLAGS: | |
2932 | case SIOCGIFPFLAGS: | |
2933 | case SIOCGIFTXQLEN: | |
2934 | case SIOCSIFTXQLEN: | |
2935 | case SIOCBRADDIF: | |
2936 | case SIOCBRDELIF: | |
9177efd3 AB |
2937 | case SIOCSIFNAME: |
2938 | case SIOCGMIIPHY: | |
2939 | case SIOCGMIIREG: | |
2940 | case SIOCSMIIREG: | |
6b96018b | 2941 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 2942 | |
6b96018b AB |
2943 | case SIOCSARP: |
2944 | case SIOCGARP: | |
2945 | case SIOCDARP: | |
6b96018b | 2946 | case SIOCATMARK: |
9177efd3 AB |
2947 | return sock_do_ioctl(net, sock, cmd, arg); |
2948 | } | |
2949 | ||
2950 | /* Prevent warning from compat_sys_ioctl, these always | |
2951 | * result in -EINVAL in the native case anyway. */ | |
2952 | switch (cmd) { | |
2953 | case SIOCRTMSG: | |
2954 | case SIOCGIFCOUNT: | |
6b96018b AB |
2955 | case SIOCSRARP: |
2956 | case SIOCGRARP: | |
2957 | case SIOCDRARP: | |
9177efd3 AB |
2958 | case SIOCSIFLINK: |
2959 | case SIOCGIFSLAVE: | |
2960 | case SIOCSIFSLAVE: | |
2961 | return -EINVAL; | |
6b96018b AB |
2962 | } |
2963 | ||
2964 | return -ENOIOCTLCMD; | |
2965 | } | |
7a229387 | 2966 | |
89bbfc95 | 2967 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
89bddce5 | 2968 | unsigned long arg) |
89bbfc95 SP |
2969 | { |
2970 | struct socket *sock = file->private_data; | |
2971 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
2972 | struct sock *sk; |
2973 | struct net *net; | |
2974 | ||
2975 | sk = sock->sk; | |
2976 | net = sock_net(sk); | |
89bbfc95 SP |
2977 | |
2978 | if (sock->ops->compat_ioctl) | |
2979 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
2980 | ||
87de87d5 DM |
2981 | if (ret == -ENOIOCTLCMD && |
2982 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
2983 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
2984 | ||
6b96018b AB |
2985 | if (ret == -ENOIOCTLCMD) |
2986 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
2987 | ||
89bbfc95 SP |
2988 | return ret; |
2989 | } | |
2990 | #endif | |
2991 | ||
ac5a488e SS |
2992 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
2993 | { | |
2994 | return sock->ops->bind(sock, addr, addrlen); | |
2995 | } | |
2996 | ||
2997 | int kernel_listen(struct socket *sock, int backlog) | |
2998 | { | |
2999 | return sock->ops->listen(sock, backlog); | |
3000 | } | |
3001 | ||
3002 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3003 | { | |
3004 | struct sock *sk = sock->sk; | |
3005 | int err; | |
3006 | ||
3007 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3008 | newsock); | |
3009 | if (err < 0) | |
3010 | goto done; | |
3011 | ||
3012 | err = sock->ops->accept(sock, *newsock, flags); | |
3013 | if (err < 0) { | |
3014 | sock_release(*newsock); | |
fa8705b0 | 3015 | *newsock = NULL; |
ac5a488e SS |
3016 | goto done; |
3017 | } | |
3018 | ||
3019 | (*newsock)->ops = sock->ops; | |
1b08534e | 3020 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3021 | |
3022 | done: | |
3023 | return err; | |
3024 | } | |
3025 | ||
3026 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3027 | int flags) |
ac5a488e SS |
3028 | { |
3029 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3030 | } | |
3031 | ||
3032 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3033 | int *addrlen) | |
3034 | { | |
3035 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3036 | } | |
3037 | ||
3038 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3039 | int *addrlen) | |
3040 | { | |
3041 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3042 | } | |
3043 | ||
3044 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3045 | char *optval, int *optlen) | |
3046 | { | |
3047 | mm_segment_t oldfs = get_fs(); | |
3048 | int err; | |
3049 | ||
3050 | set_fs(KERNEL_DS); | |
3051 | if (level == SOL_SOCKET) | |
3052 | err = sock_getsockopt(sock, level, optname, optval, optlen); | |
3053 | else | |
3054 | err = sock->ops->getsockopt(sock, level, optname, optval, | |
3055 | optlen); | |
3056 | set_fs(oldfs); | |
3057 | return err; | |
3058 | } | |
3059 | ||
3060 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3061 | char *optval, unsigned int optlen) |
ac5a488e SS |
3062 | { |
3063 | mm_segment_t oldfs = get_fs(); | |
3064 | int err; | |
3065 | ||
3066 | set_fs(KERNEL_DS); | |
3067 | if (level == SOL_SOCKET) | |
3068 | err = sock_setsockopt(sock, level, optname, optval, optlen); | |
3069 | else | |
3070 | err = sock->ops->setsockopt(sock, level, optname, optval, | |
3071 | optlen); | |
3072 | set_fs(oldfs); | |
3073 | return err; | |
3074 | } | |
3075 | ||
3076 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3077 | size_t size, int flags) | |
3078 | { | |
f8451725 HX |
3079 | sock_update_classid(sock->sk); |
3080 | ||
ac5a488e SS |
3081 | if (sock->ops->sendpage) |
3082 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3083 | ||
3084 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3085 | } | |
3086 | ||
3087 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3088 | { | |
3089 | mm_segment_t oldfs = get_fs(); | |
3090 | int err; | |
3091 | ||
3092 | set_fs(KERNEL_DS); | |
3093 | err = sock->ops->ioctl(sock, cmd, arg); | |
3094 | set_fs(oldfs); | |
3095 | ||
3096 | return err; | |
3097 | } | |
3098 | ||
91cf45f0 TM |
3099 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3100 | { | |
3101 | return sock->ops->shutdown(sock, how); | |
3102 | } | |
3103 | ||
1da177e4 LT |
3104 | EXPORT_SYMBOL(sock_create); |
3105 | EXPORT_SYMBOL(sock_create_kern); | |
3106 | EXPORT_SYMBOL(sock_create_lite); | |
3107 | EXPORT_SYMBOL(sock_map_fd); | |
3108 | EXPORT_SYMBOL(sock_recvmsg); | |
3109 | EXPORT_SYMBOL(sock_register); | |
3110 | EXPORT_SYMBOL(sock_release); | |
3111 | EXPORT_SYMBOL(sock_sendmsg); | |
3112 | EXPORT_SYMBOL(sock_unregister); | |
3113 | EXPORT_SYMBOL(sock_wake_async); | |
3114 | EXPORT_SYMBOL(sockfd_lookup); | |
3115 | EXPORT_SYMBOL(kernel_sendmsg); | |
3116 | EXPORT_SYMBOL(kernel_recvmsg); | |
ac5a488e SS |
3117 | EXPORT_SYMBOL(kernel_bind); |
3118 | EXPORT_SYMBOL(kernel_listen); | |
3119 | EXPORT_SYMBOL(kernel_accept); | |
3120 | EXPORT_SYMBOL(kernel_connect); | |
3121 | EXPORT_SYMBOL(kernel_getsockname); | |
3122 | EXPORT_SYMBOL(kernel_getpeername); | |
3123 | EXPORT_SYMBOL(kernel_getsockopt); | |
3124 | EXPORT_SYMBOL(kernel_setsockopt); | |
3125 | EXPORT_SYMBOL(kernel_sendpage); | |
3126 | EXPORT_SYMBOL(kernel_sock_ioctl); | |
91cf45f0 | 3127 | EXPORT_SYMBOL(kernel_sock_shutdown); |