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 | 72 | #include <linux/if_bridge.h> |
20380731 ACM |
73 | #include <linux/if_frad.h> |
74 | #include <linux/if_vlan.h> | |
408eccce | 75 | #include <linux/ptp_classify.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> |
600e1779 | 91 | #include <linux/xattr.h> |
1da177e4 LT |
92 | |
93 | #include <asm/uaccess.h> | |
94 | #include <asm/unistd.h> | |
95 | ||
96 | #include <net/compat.h> | |
87de87d5 | 97 | #include <net/wext.h> |
f8451725 | 98 | #include <net/cls_cgroup.h> |
1da177e4 LT |
99 | |
100 | #include <net/sock.h> | |
101 | #include <linux/netfilter.h> | |
102 | ||
6b96018b AB |
103 | #include <linux/if_tun.h> |
104 | #include <linux/ipv6_route.h> | |
105 | #include <linux/route.h> | |
6b96018b AB |
106 | #include <linux/sockios.h> |
107 | #include <linux/atalk.h> | |
076bb0c8 | 108 | #include <net/busy_poll.h> |
f24b9be5 | 109 | #include <linux/errqueue.h> |
06021292 | 110 | |
e0d1095a | 111 | #ifdef CONFIG_NET_RX_BUSY_POLL |
64b0dc51 ET |
112 | unsigned int sysctl_net_busy_read __read_mostly; |
113 | unsigned int sysctl_net_busy_poll __read_mostly; | |
06021292 | 114 | #endif |
6b96018b | 115 | |
1da177e4 | 116 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
117 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
118 | unsigned long nr_segs, loff_t pos); | |
119 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
120 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 121 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
122 | |
123 | static int sock_close(struct inode *inode, struct file *file); | |
124 | static unsigned int sock_poll(struct file *file, | |
125 | struct poll_table_struct *wait); | |
89bddce5 | 126 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
127 | #ifdef CONFIG_COMPAT |
128 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 129 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 130 | #endif |
1da177e4 | 131 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
132 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
133 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 134 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 135 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 136 | unsigned int flags); |
1da177e4 | 137 | |
1da177e4 LT |
138 | /* |
139 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
140 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
141 | */ | |
142 | ||
da7071d7 | 143 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
144 | .owner = THIS_MODULE, |
145 | .llseek = no_llseek, | |
146 | .aio_read = sock_aio_read, | |
147 | .aio_write = sock_aio_write, | |
148 | .poll = sock_poll, | |
149 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
150 | #ifdef CONFIG_COMPAT |
151 | .compat_ioctl = compat_sock_ioctl, | |
152 | #endif | |
1da177e4 LT |
153 | .mmap = sock_mmap, |
154 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
155 | .release = sock_close, | |
156 | .fasync = sock_fasync, | |
5274f052 JA |
157 | .sendpage = sock_sendpage, |
158 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 159 | .splice_read = sock_splice_read, |
1da177e4 LT |
160 | }; |
161 | ||
162 | /* | |
163 | * The protocol list. Each protocol is registered in here. | |
164 | */ | |
165 | ||
1da177e4 | 166 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 167 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 168 | |
1da177e4 LT |
169 | /* |
170 | * Statistics counters of the socket lists | |
171 | */ | |
172 | ||
c6d409cf | 173 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
174 | |
175 | /* | |
89bddce5 SH |
176 | * Support routines. |
177 | * Move socket addresses back and forth across the kernel/user | |
178 | * divide and look after the messy bits. | |
1da177e4 LT |
179 | */ |
180 | ||
1da177e4 LT |
181 | /** |
182 | * move_addr_to_kernel - copy a socket address into kernel space | |
183 | * @uaddr: Address in user space | |
184 | * @kaddr: Address in kernel space | |
185 | * @ulen: Length in user space | |
186 | * | |
187 | * The address is copied into kernel space. If the provided address is | |
188 | * too long an error code of -EINVAL is returned. If the copy gives | |
189 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
190 | */ | |
191 | ||
43db362d | 192 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 193 | { |
230b1839 | 194 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 195 | return -EINVAL; |
89bddce5 | 196 | if (ulen == 0) |
1da177e4 | 197 | return 0; |
89bddce5 | 198 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 199 | return -EFAULT; |
3ec3b2fb | 200 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
201 | } |
202 | ||
203 | /** | |
204 | * move_addr_to_user - copy an address to user space | |
205 | * @kaddr: kernel space address | |
206 | * @klen: length of address in kernel | |
207 | * @uaddr: user space address | |
208 | * @ulen: pointer to user length field | |
209 | * | |
210 | * The value pointed to by ulen on entry is the buffer length available. | |
211 | * This is overwritten with the buffer space used. -EINVAL is returned | |
212 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
213 | * is returned if either the buffer or the length field are not | |
214 | * accessible. | |
215 | * After copying the data up to the limit the user specifies, the true | |
216 | * length of the data is written over the length limit the user | |
217 | * specified. Zero is returned for a success. | |
218 | */ | |
89bddce5 | 219 | |
43db362d | 220 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 221 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
222 | { |
223 | int err; | |
224 | int len; | |
225 | ||
68c6beb3 | 226 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
89bddce5 SH |
227 | err = get_user(len, ulen); |
228 | if (err) | |
1da177e4 | 229 | return err; |
89bddce5 SH |
230 | if (len > klen) |
231 | len = klen; | |
68c6beb3 | 232 | if (len < 0) |
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; | |
eaefd110 | 252 | struct socket_wq *wq; |
89bddce5 | 253 | |
e94b1766 | 254 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
255 | if (!ei) |
256 | return NULL; | |
eaefd110 ED |
257 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
258 | if (!wq) { | |
43815482 ED |
259 | kmem_cache_free(sock_inode_cachep, ei); |
260 | return NULL; | |
261 | } | |
eaefd110 ED |
262 | init_waitqueue_head(&wq->wait); |
263 | wq->fasync_list = NULL; | |
264 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 265 | |
1da177e4 LT |
266 | ei->socket.state = SS_UNCONNECTED; |
267 | ei->socket.flags = 0; | |
268 | ei->socket.ops = NULL; | |
269 | ei->socket.sk = NULL; | |
270 | ei->socket.file = NULL; | |
1da177e4 LT |
271 | |
272 | return &ei->vfs_inode; | |
273 | } | |
274 | ||
275 | static void sock_destroy_inode(struct inode *inode) | |
276 | { | |
43815482 | 277 | struct socket_alloc *ei; |
eaefd110 | 278 | struct socket_wq *wq; |
43815482 ED |
279 | |
280 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 281 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 282 | kfree_rcu(wq, rcu); |
43815482 | 283 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
284 | } |
285 | ||
51cc5068 | 286 | static void init_once(void *foo) |
1da177e4 | 287 | { |
89bddce5 | 288 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 289 | |
a35afb83 | 290 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 291 | } |
89bddce5 | 292 | |
1da177e4 LT |
293 | static int init_inodecache(void) |
294 | { | |
295 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
296 | sizeof(struct socket_alloc), |
297 | 0, | |
298 | (SLAB_HWCACHE_ALIGN | | |
299 | SLAB_RECLAIM_ACCOUNT | | |
300 | SLAB_MEM_SPREAD), | |
20c2df83 | 301 | init_once); |
1da177e4 LT |
302 | if (sock_inode_cachep == NULL) |
303 | return -ENOMEM; | |
304 | return 0; | |
305 | } | |
306 | ||
b87221de | 307 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
308 | .alloc_inode = sock_alloc_inode, |
309 | .destroy_inode = sock_destroy_inode, | |
310 | .statfs = simple_statfs, | |
1da177e4 LT |
311 | }; |
312 | ||
c23fbb6b ED |
313 | /* |
314 | * sockfs_dname() is called from d_path(). | |
315 | */ | |
316 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
317 | { | |
318 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
319 | dentry->d_inode->i_ino); | |
320 | } | |
321 | ||
3ba13d17 | 322 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 323 | .d_dname = sockfs_dname, |
1da177e4 LT |
324 | }; |
325 | ||
c74a1cbb AV |
326 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
327 | int flags, const char *dev_name, void *data) | |
328 | { | |
329 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
330 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
331 | } | |
332 | ||
333 | static struct vfsmount *sock_mnt __read_mostly; | |
334 | ||
335 | static struct file_system_type sock_fs_type = { | |
336 | .name = "sockfs", | |
337 | .mount = sockfs_mount, | |
338 | .kill_sb = kill_anon_super, | |
339 | }; | |
340 | ||
1da177e4 LT |
341 | /* |
342 | * Obtains the first available file descriptor and sets it up for use. | |
343 | * | |
39d8c1b6 DM |
344 | * These functions create file structures and maps them to fd space |
345 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
346 | * and file struct implicitly stored in sock->file. |
347 | * Note that another thread may close file descriptor before we return | |
348 | * from this function. We use the fact that now we do not refer | |
349 | * to socket after mapping. If one day we will need it, this | |
350 | * function will increment ref. count on file by 1. | |
351 | * | |
352 | * In any case returned fd MAY BE not valid! | |
353 | * This race condition is unavoidable | |
354 | * with shared fd spaces, we cannot solve it inside kernel, | |
355 | * but we take care of internal coherence yet. | |
356 | */ | |
357 | ||
aab174f0 | 358 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 359 | { |
7cbe66b6 | 360 | struct qstr name = { .name = "" }; |
2c48b9c4 | 361 | struct path path; |
7cbe66b6 | 362 | struct file *file; |
1da177e4 | 363 | |
600e1779 MY |
364 | if (dname) { |
365 | name.name = dname; | |
366 | name.len = strlen(name.name); | |
367 | } else if (sock->sk) { | |
368 | name.name = sock->sk->sk_prot_creator->name; | |
369 | name.len = strlen(name.name); | |
370 | } | |
4b936885 | 371 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
372 | if (unlikely(!path.dentry)) |
373 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 374 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 375 | |
2c48b9c4 | 376 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 377 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 378 | |
2c48b9c4 | 379 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 380 | &socket_file_ops); |
39b65252 | 381 | if (unlikely(IS_ERR(file))) { |
cc3808f8 | 382 | /* drop dentry, keep inode */ |
7de9c6ee | 383 | ihold(path.dentry->d_inode); |
2c48b9c4 | 384 | path_put(&path); |
39b65252 | 385 | return file; |
cc3808f8 AV |
386 | } |
387 | ||
388 | sock->file = file; | |
77d27200 | 389 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 390 | file->private_data = sock; |
28407630 | 391 | return file; |
39d8c1b6 | 392 | } |
56b31d1c | 393 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 394 | |
56b31d1c | 395 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
396 | { |
397 | struct file *newfile; | |
28407630 AV |
398 | int fd = get_unused_fd_flags(flags); |
399 | if (unlikely(fd < 0)) | |
400 | return fd; | |
39d8c1b6 | 401 | |
aab174f0 | 402 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 403 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 404 | fd_install(fd, newfile); |
28407630 AV |
405 | return fd; |
406 | } | |
7cbe66b6 | 407 | |
28407630 AV |
408 | put_unused_fd(fd); |
409 | return PTR_ERR(newfile); | |
1da177e4 LT |
410 | } |
411 | ||
406a3c63 | 412 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 413 | { |
6cb153ca BL |
414 | if (file->f_op == &socket_file_ops) |
415 | return file->private_data; /* set in sock_map_fd */ | |
416 | ||
23bb80d2 ED |
417 | *err = -ENOTSOCK; |
418 | return NULL; | |
6cb153ca | 419 | } |
406a3c63 | 420 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 421 | |
1da177e4 | 422 | /** |
c6d409cf | 423 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
424 | * @fd: file handle |
425 | * @err: pointer to an error code return | |
426 | * | |
427 | * The file handle passed in is locked and the socket it is bound | |
428 | * too is returned. If an error occurs the err pointer is overwritten | |
429 | * with a negative errno code and NULL is returned. The function checks | |
430 | * for both invalid handles and passing a handle which is not a socket. | |
431 | * | |
432 | * On a success the socket object pointer is returned. | |
433 | */ | |
434 | ||
435 | struct socket *sockfd_lookup(int fd, int *err) | |
436 | { | |
437 | struct file *file; | |
1da177e4 LT |
438 | struct socket *sock; |
439 | ||
89bddce5 SH |
440 | file = fget(fd); |
441 | if (!file) { | |
1da177e4 LT |
442 | *err = -EBADF; |
443 | return NULL; | |
444 | } | |
89bddce5 | 445 | |
6cb153ca BL |
446 | sock = sock_from_file(file, err); |
447 | if (!sock) | |
1da177e4 | 448 | fput(file); |
6cb153ca BL |
449 | return sock; |
450 | } | |
c6d409cf | 451 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 452 | |
6cb153ca BL |
453 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
454 | { | |
00e188ef | 455 | struct fd f = fdget(fd); |
6cb153ca BL |
456 | struct socket *sock; |
457 | ||
3672558c | 458 | *err = -EBADF; |
00e188ef AV |
459 | if (f.file) { |
460 | sock = sock_from_file(f.file, err); | |
461 | if (likely(sock)) { | |
462 | *fput_needed = f.flags; | |
6cb153ca | 463 | return sock; |
00e188ef AV |
464 | } |
465 | fdput(f); | |
1da177e4 | 466 | } |
6cb153ca | 467 | return NULL; |
1da177e4 LT |
468 | } |
469 | ||
600e1779 MY |
470 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
471 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
472 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
473 | static ssize_t sockfs_getxattr(struct dentry *dentry, | |
474 | const char *name, void *value, size_t size) | |
475 | { | |
476 | const char *proto_name; | |
477 | size_t proto_size; | |
478 | int error; | |
479 | ||
480 | error = -ENODATA; | |
481 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { | |
482 | proto_name = dentry->d_name.name; | |
483 | proto_size = strlen(proto_name); | |
484 | ||
485 | if (value) { | |
486 | error = -ERANGE; | |
487 | if (proto_size + 1 > size) | |
488 | goto out; | |
489 | ||
490 | strncpy(value, proto_name, proto_size + 1); | |
491 | } | |
492 | error = proto_size + 1; | |
493 | } | |
494 | ||
495 | out: | |
496 | return error; | |
497 | } | |
498 | ||
499 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, | |
500 | size_t size) | |
501 | { | |
502 | ssize_t len; | |
503 | ssize_t used = 0; | |
504 | ||
505 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); | |
506 | if (len < 0) | |
507 | return len; | |
508 | used += len; | |
509 | if (buffer) { | |
510 | if (size < used) | |
511 | return -ERANGE; | |
512 | buffer += len; | |
513 | } | |
514 | ||
515 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
516 | used += len; | |
517 | if (buffer) { | |
518 | if (size < used) | |
519 | return -ERANGE; | |
520 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
521 | buffer += len; | |
522 | } | |
523 | ||
524 | return used; | |
525 | } | |
526 | ||
527 | static const struct inode_operations sockfs_inode_ops = { | |
528 | .getxattr = sockfs_getxattr, | |
529 | .listxattr = sockfs_listxattr, | |
530 | }; | |
531 | ||
1da177e4 LT |
532 | /** |
533 | * sock_alloc - allocate a socket | |
89bddce5 | 534 | * |
1da177e4 LT |
535 | * Allocate a new inode and socket object. The two are bound together |
536 | * and initialised. The socket is then returned. If we are out of inodes | |
537 | * NULL is returned. | |
538 | */ | |
539 | ||
540 | static struct socket *sock_alloc(void) | |
541 | { | |
89bddce5 SH |
542 | struct inode *inode; |
543 | struct socket *sock; | |
1da177e4 | 544 | |
a209dfc7 | 545 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
546 | if (!inode) |
547 | return NULL; | |
548 | ||
549 | sock = SOCKET_I(inode); | |
550 | ||
29a020d3 | 551 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 552 | inode->i_ino = get_next_ino(); |
89bddce5 | 553 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
554 | inode->i_uid = current_fsuid(); |
555 | inode->i_gid = current_fsgid(); | |
600e1779 | 556 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 557 | |
19e8d69c | 558 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
559 | return sock; |
560 | } | |
561 | ||
562 | /* | |
563 | * In theory you can't get an open on this inode, but /proc provides | |
564 | * a back door. Remember to keep it shut otherwise you'll let the | |
565 | * creepy crawlies in. | |
566 | */ | |
89bddce5 | 567 | |
1da177e4 LT |
568 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
569 | { | |
570 | return -ENXIO; | |
571 | } | |
572 | ||
4b6f5d20 | 573 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
574 | .owner = THIS_MODULE, |
575 | .open = sock_no_open, | |
6038f373 | 576 | .llseek = noop_llseek, |
1da177e4 LT |
577 | }; |
578 | ||
579 | /** | |
580 | * sock_release - close a socket | |
581 | * @sock: socket to close | |
582 | * | |
583 | * The socket is released from the protocol stack if it has a release | |
584 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 585 | * an inode not a file. |
1da177e4 | 586 | */ |
89bddce5 | 587 | |
1da177e4 LT |
588 | void sock_release(struct socket *sock) |
589 | { | |
590 | if (sock->ops) { | |
591 | struct module *owner = sock->ops->owner; | |
592 | ||
593 | sock->ops->release(sock); | |
594 | sock->ops = NULL; | |
595 | module_put(owner); | |
596 | } | |
597 | ||
eaefd110 | 598 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
3410f22e | 599 | pr_err("%s: fasync list not empty!\n", __func__); |
1da177e4 | 600 | |
b09e786b MP |
601 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
602 | return; | |
603 | ||
19e8d69c | 604 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
605 | if (!sock->file) { |
606 | iput(SOCK_INODE(sock)); | |
607 | return; | |
608 | } | |
89bddce5 | 609 | sock->file = NULL; |
1da177e4 | 610 | } |
c6d409cf | 611 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 612 | |
67cc0d40 | 613 | void __sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags) |
20d49473 | 614 | { |
140c55d4 ED |
615 | u8 flags = *tx_flags; |
616 | ||
b9f40e21 | 617 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
140c55d4 ED |
618 | flags |= SKBTX_HW_TSTAMP; |
619 | ||
b9f40e21 | 620 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
140c55d4 ED |
621 | flags |= SKBTX_SW_TSTAMP; |
622 | ||
e7fd2885 | 623 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED) |
140c55d4 ED |
624 | flags |= SKBTX_SCHED_TSTAMP; |
625 | ||
e1c8a607 | 626 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK) |
140c55d4 | 627 | flags |= SKBTX_ACK_TSTAMP; |
e7fd2885 | 628 | |
140c55d4 | 629 | *tx_flags = flags; |
20d49473 | 630 | } |
67cc0d40 | 631 | EXPORT_SYMBOL(__sock_tx_timestamp); |
20d49473 | 632 | |
228e548e AB |
633 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
634 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
635 | { |
636 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 LT |
637 | |
638 | si->sock = sock; | |
639 | si->scm = NULL; | |
640 | si->msg = msg; | |
641 | si->size = size; | |
642 | ||
1da177e4 LT |
643 | return sock->ops->sendmsg(iocb, sock, msg, size); |
644 | } | |
645 | ||
228e548e AB |
646 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
647 | struct msghdr *msg, size_t size) | |
648 | { | |
649 | int err = security_socket_sendmsg(sock, msg, size); | |
650 | ||
651 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
652 | } | |
653 | ||
1da177e4 LT |
654 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
655 | { | |
656 | struct kiocb iocb; | |
657 | struct sock_iocb siocb; | |
658 | int ret; | |
659 | ||
660 | init_sync_kiocb(&iocb, NULL); | |
661 | iocb.private = &siocb; | |
662 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
663 | if (-EIOCBQUEUED == ret) | |
664 | ret = wait_on_sync_kiocb(&iocb); | |
665 | return ret; | |
666 | } | |
c6d409cf | 667 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 668 | |
894dc24c | 669 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
670 | { |
671 | struct kiocb iocb; | |
672 | struct sock_iocb siocb; | |
673 | int ret; | |
674 | ||
675 | init_sync_kiocb(&iocb, NULL); | |
676 | iocb.private = &siocb; | |
677 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
678 | if (-EIOCBQUEUED == ret) | |
679 | ret = wait_on_sync_kiocb(&iocb); | |
680 | return ret; | |
681 | } | |
682 | ||
1da177e4 LT |
683 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
684 | struct kvec *vec, size_t num, size_t size) | |
685 | { | |
686 | mm_segment_t oldfs = get_fs(); | |
687 | int result; | |
688 | ||
689 | set_fs(KERNEL_DS); | |
690 | /* | |
691 | * the following is safe, since for compiler definitions of kvec and | |
692 | * iovec are identical, yielding the same in-core layout and alignment | |
693 | */ | |
89bddce5 | 694 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
695 | msg->msg_iovlen = num; |
696 | result = sock_sendmsg(sock, msg, size); | |
697 | set_fs(oldfs); | |
698 | return result; | |
699 | } | |
c6d409cf | 700 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 701 | |
92f37fd2 ED |
702 | /* |
703 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
704 | */ | |
705 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
706 | struct sk_buff *skb) | |
707 | { | |
20d49473 | 708 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
f24b9be5 | 709 | struct scm_timestamping tss; |
20d49473 PO |
710 | int empty = 1; |
711 | struct skb_shared_hwtstamps *shhwtstamps = | |
712 | skb_hwtstamps(skb); | |
713 | ||
714 | /* Race occurred between timestamp enabling and packet | |
715 | receiving. Fill in the current time for now. */ | |
716 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
717 | __net_timestamp(skb); | |
718 | ||
719 | if (need_software_tstamp) { | |
720 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
721 | struct timeval tv; | |
722 | skb_get_timestamp(skb, &tv); | |
723 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
724 | sizeof(tv), &tv); | |
725 | } else { | |
f24b9be5 WB |
726 | struct timespec ts; |
727 | skb_get_timestampns(skb, &ts); | |
20d49473 | 728 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
f24b9be5 | 729 | sizeof(ts), &ts); |
20d49473 PO |
730 | } |
731 | } | |
732 | ||
f24b9be5 | 733 | memset(&tss, 0, sizeof(tss)); |
c199105d | 734 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
f24b9be5 | 735 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
20d49473 | 736 | empty = 0; |
4d276eb6 | 737 | if (shhwtstamps && |
b9f40e21 | 738 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
f24b9be5 | 739 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) |
4d276eb6 | 740 | empty = 0; |
20d49473 PO |
741 | if (!empty) |
742 | put_cmsg(msg, SOL_SOCKET, | |
f24b9be5 | 743 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
92f37fd2 | 744 | } |
7c81fd8b ACM |
745 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
746 | ||
6e3e939f JB |
747 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
748 | struct sk_buff *skb) | |
749 | { | |
750 | int ack; | |
751 | ||
752 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
753 | return; | |
754 | if (!skb->wifi_acked_valid) | |
755 | return; | |
756 | ||
757 | ack = skb->wifi_acked; | |
758 | ||
759 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
760 | } | |
761 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
762 | ||
11165f14 | 763 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
764 | struct sk_buff *skb) | |
3b885787 NH |
765 | { |
766 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
767 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
768 | sizeof(__u32), &skb->dropcount); | |
769 | } | |
770 | ||
767dd033 | 771 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
772 | struct sk_buff *skb) |
773 | { | |
774 | sock_recv_timestamp(msg, sk, skb); | |
775 | sock_recv_drops(msg, sk, skb); | |
776 | } | |
767dd033 | 777 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 778 | |
a2e27255 ACM |
779 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
780 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 781 | { |
1da177e4 LT |
782 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
783 | ||
784 | si->sock = sock; | |
785 | si->scm = NULL; | |
786 | si->msg = msg; | |
787 | si->size = size; | |
788 | si->flags = flags; | |
789 | ||
1da177e4 LT |
790 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
791 | } | |
792 | ||
a2e27255 ACM |
793 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
794 | struct msghdr *msg, size_t size, int flags) | |
795 | { | |
796 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
797 | ||
798 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
799 | } | |
800 | ||
89bddce5 | 801 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
802 | size_t size, int flags) |
803 | { | |
804 | struct kiocb iocb; | |
805 | struct sock_iocb siocb; | |
806 | int ret; | |
807 | ||
89bddce5 | 808 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
809 | iocb.private = &siocb; |
810 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
811 | if (-EIOCBQUEUED == ret) | |
812 | ret = wait_on_sync_kiocb(&iocb); | |
813 | return ret; | |
814 | } | |
c6d409cf | 815 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 816 | |
a2e27255 ACM |
817 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
818 | size_t size, int flags) | |
819 | { | |
820 | struct kiocb iocb; | |
821 | struct sock_iocb siocb; | |
822 | int ret; | |
823 | ||
824 | init_sync_kiocb(&iocb, NULL); | |
825 | iocb.private = &siocb; | |
826 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
827 | if (-EIOCBQUEUED == ret) | |
828 | ret = wait_on_sync_kiocb(&iocb); | |
829 | return ret; | |
830 | } | |
831 | ||
c1249c0a ML |
832 | /** |
833 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
834 | * @sock: The socket to receive the message from | |
835 | * @msg: Received message | |
836 | * @vec: Input s/g array for message data | |
837 | * @num: Size of input s/g array | |
838 | * @size: Number of bytes to read | |
839 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
840 | * | |
841 | * On return the msg structure contains the scatter/gather array passed in the | |
842 | * vec argument. The array is modified so that it consists of the unfilled | |
843 | * portion of the original array. | |
844 | * | |
845 | * The returned value is the total number of bytes received, or an error. | |
846 | */ | |
89bddce5 SH |
847 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
848 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
849 | { |
850 | mm_segment_t oldfs = get_fs(); | |
851 | int result; | |
852 | ||
853 | set_fs(KERNEL_DS); | |
854 | /* | |
855 | * the following is safe, since for compiler definitions of kvec and | |
856 | * iovec are identical, yielding the same in-core layout and alignment | |
857 | */ | |
89bddce5 | 858 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
859 | result = sock_recvmsg(sock, msg, size, flags); |
860 | set_fs(oldfs); | |
861 | return result; | |
862 | } | |
c6d409cf | 863 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 | 864 | |
ce1d4d3e CH |
865 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
866 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 867 | { |
1da177e4 LT |
868 | struct socket *sock; |
869 | int flags; | |
870 | ||
ce1d4d3e CH |
871 | sock = file->private_data; |
872 | ||
35f9c09f ED |
873 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
874 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
875 | flags |= more; | |
ce1d4d3e | 876 | |
e6949583 | 877 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 878 | } |
1da177e4 | 879 | |
9c55e01c | 880 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 881 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
882 | unsigned int flags) |
883 | { | |
884 | struct socket *sock = file->private_data; | |
885 | ||
997b37da RDC |
886 | if (unlikely(!sock->ops->splice_read)) |
887 | return -EINVAL; | |
888 | ||
9c55e01c JA |
889 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
890 | } | |
891 | ||
ce1d4d3e | 892 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 893 | struct sock_iocb *siocb) |
ce1d4d3e | 894 | { |
d29c445b KO |
895 | if (!is_sync_kiocb(iocb)) |
896 | BUG(); | |
1da177e4 | 897 | |
ce1d4d3e | 898 | siocb->kiocb = iocb; |
ce1d4d3e CH |
899 | iocb->private = siocb; |
900 | return siocb; | |
1da177e4 LT |
901 | } |
902 | ||
ce1d4d3e | 903 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
904 | struct file *file, const struct iovec *iov, |
905 | unsigned long nr_segs) | |
ce1d4d3e CH |
906 | { |
907 | struct socket *sock = file->private_data; | |
908 | size_t size = 0; | |
909 | int i; | |
1da177e4 | 910 | |
89bddce5 SH |
911 | for (i = 0; i < nr_segs; i++) |
912 | size += iov[i].iov_len; | |
1da177e4 | 913 | |
ce1d4d3e CH |
914 | msg->msg_name = NULL; |
915 | msg->msg_namelen = 0; | |
916 | msg->msg_control = NULL; | |
917 | msg->msg_controllen = 0; | |
89bddce5 | 918 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
919 | msg->msg_iovlen = nr_segs; |
920 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
921 | ||
922 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
923 | } | |
924 | ||
027445c3 BP |
925 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
926 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
927 | { |
928 | struct sock_iocb siocb, *x; | |
929 | ||
1da177e4 LT |
930 | if (pos != 0) |
931 | return -ESPIPE; | |
027445c3 | 932 | |
73a7075e | 933 | if (iocb->ki_nbytes == 0) /* Match SYS5 behaviour */ |
1da177e4 LT |
934 | return 0; |
935 | ||
027445c3 BP |
936 | |
937 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
938 | if (!x) |
939 | return -ENOMEM; | |
027445c3 | 940 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
941 | } |
942 | ||
ce1d4d3e | 943 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
944 | struct file *file, const struct iovec *iov, |
945 | unsigned long nr_segs) | |
1da177e4 | 946 | { |
ce1d4d3e CH |
947 | struct socket *sock = file->private_data; |
948 | size_t size = 0; | |
949 | int i; | |
1da177e4 | 950 | |
89bddce5 SH |
951 | for (i = 0; i < nr_segs; i++) |
952 | size += iov[i].iov_len; | |
1da177e4 | 953 | |
ce1d4d3e CH |
954 | msg->msg_name = NULL; |
955 | msg->msg_namelen = 0; | |
956 | msg->msg_control = NULL; | |
957 | msg->msg_controllen = 0; | |
89bddce5 | 958 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
959 | msg->msg_iovlen = nr_segs; |
960 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
961 | if (sock->type == SOCK_SEQPACKET) | |
962 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 963 | |
ce1d4d3e | 964 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
965 | } |
966 | ||
027445c3 BP |
967 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
968 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
969 | { |
970 | struct sock_iocb siocb, *x; | |
1da177e4 | 971 | |
ce1d4d3e CH |
972 | if (pos != 0) |
973 | return -ESPIPE; | |
027445c3 | 974 | |
027445c3 | 975 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
976 | if (!x) |
977 | return -ENOMEM; | |
1da177e4 | 978 | |
027445c3 | 979 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
980 | } |
981 | ||
1da177e4 LT |
982 | /* |
983 | * Atomic setting of ioctl hooks to avoid race | |
984 | * with module unload. | |
985 | */ | |
986 | ||
4a3e2f71 | 987 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 988 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 989 | |
881d966b | 990 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 991 | { |
4a3e2f71 | 992 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 993 | br_ioctl_hook = hook; |
4a3e2f71 | 994 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
995 | } |
996 | EXPORT_SYMBOL(brioctl_set); | |
997 | ||
4a3e2f71 | 998 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 999 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 1000 | |
881d966b | 1001 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 1002 | { |
4a3e2f71 | 1003 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1004 | vlan_ioctl_hook = hook; |
4a3e2f71 | 1005 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
1006 | } |
1007 | EXPORT_SYMBOL(vlan_ioctl_set); | |
1008 | ||
4a3e2f71 | 1009 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 1010 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 1011 | |
89bddce5 | 1012 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 1013 | { |
4a3e2f71 | 1014 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 1015 | dlci_ioctl_hook = hook; |
4a3e2f71 | 1016 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1017 | } |
1018 | EXPORT_SYMBOL(dlci_ioctl_set); | |
1019 | ||
6b96018b AB |
1020 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
1021 | unsigned int cmd, unsigned long arg) | |
1022 | { | |
1023 | int err; | |
1024 | void __user *argp = (void __user *)arg; | |
1025 | ||
1026 | err = sock->ops->ioctl(sock, cmd, arg); | |
1027 | ||
1028 | /* | |
1029 | * If this ioctl is unknown try to hand it down | |
1030 | * to the NIC driver. | |
1031 | */ | |
1032 | if (err == -ENOIOCTLCMD) | |
1033 | err = dev_ioctl(net, cmd, argp); | |
1034 | ||
1035 | return err; | |
1036 | } | |
1037 | ||
1da177e4 LT |
1038 | /* |
1039 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1040 | * what to do with it - that's up to the protocol still. | |
1041 | */ | |
1042 | ||
1043 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1044 | { | |
1045 | struct socket *sock; | |
881d966b | 1046 | struct sock *sk; |
1da177e4 LT |
1047 | void __user *argp = (void __user *)arg; |
1048 | int pid, err; | |
881d966b | 1049 | struct net *net; |
1da177e4 | 1050 | |
b69aee04 | 1051 | sock = file->private_data; |
881d966b | 1052 | sk = sock->sk; |
3b1e0a65 | 1053 | net = sock_net(sk); |
1da177e4 | 1054 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1055 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1056 | } else |
3d23e349 | 1057 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1058 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1059 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1060 | } else |
3d23e349 | 1061 | #endif |
89bddce5 | 1062 | switch (cmd) { |
1da177e4 LT |
1063 | case FIOSETOWN: |
1064 | case SIOCSPGRP: | |
1065 | err = -EFAULT; | |
1066 | if (get_user(pid, (int __user *)argp)) | |
1067 | break; | |
e0b93edd JL |
1068 | f_setown(sock->file, pid, 1); |
1069 | err = 0; | |
1da177e4 LT |
1070 | break; |
1071 | case FIOGETOWN: | |
1072 | case SIOCGPGRP: | |
609d7fa9 | 1073 | err = put_user(f_getown(sock->file), |
89bddce5 | 1074 | (int __user *)argp); |
1da177e4 LT |
1075 | break; |
1076 | case SIOCGIFBR: | |
1077 | case SIOCSIFBR: | |
1078 | case SIOCBRADDBR: | |
1079 | case SIOCBRDELBR: | |
1080 | err = -ENOPKG; | |
1081 | if (!br_ioctl_hook) | |
1082 | request_module("bridge"); | |
1083 | ||
4a3e2f71 | 1084 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1085 | if (br_ioctl_hook) |
881d966b | 1086 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1087 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1088 | break; |
1089 | case SIOCGIFVLAN: | |
1090 | case SIOCSIFVLAN: | |
1091 | err = -ENOPKG; | |
1092 | if (!vlan_ioctl_hook) | |
1093 | request_module("8021q"); | |
1094 | ||
4a3e2f71 | 1095 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1096 | if (vlan_ioctl_hook) |
881d966b | 1097 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1098 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1099 | break; |
1da177e4 LT |
1100 | case SIOCADDDLCI: |
1101 | case SIOCDELDLCI: | |
1102 | err = -ENOPKG; | |
1103 | if (!dlci_ioctl_hook) | |
1104 | request_module("dlci"); | |
1105 | ||
7512cbf6 PE |
1106 | mutex_lock(&dlci_ioctl_mutex); |
1107 | if (dlci_ioctl_hook) | |
1da177e4 | 1108 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1109 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1110 | break; |
1111 | default: | |
6b96018b | 1112 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1113 | break; |
89bddce5 | 1114 | } |
1da177e4 LT |
1115 | return err; |
1116 | } | |
1117 | ||
1118 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1119 | { | |
1120 | int err; | |
1121 | struct socket *sock = NULL; | |
89bddce5 | 1122 | |
1da177e4 LT |
1123 | err = security_socket_create(family, type, protocol, 1); |
1124 | if (err) | |
1125 | goto out; | |
1126 | ||
1127 | sock = sock_alloc(); | |
1128 | if (!sock) { | |
1129 | err = -ENOMEM; | |
1130 | goto out; | |
1131 | } | |
1132 | ||
1da177e4 | 1133 | sock->type = type; |
7420ed23 VY |
1134 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1135 | if (err) | |
1136 | goto out_release; | |
1137 | ||
1da177e4 LT |
1138 | out: |
1139 | *res = sock; | |
1140 | return err; | |
7420ed23 VY |
1141 | out_release: |
1142 | sock_release(sock); | |
1143 | sock = NULL; | |
1144 | goto out; | |
1da177e4 | 1145 | } |
c6d409cf | 1146 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1147 | |
1148 | /* No kernel lock held - perfect */ | |
89bddce5 | 1149 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 | 1150 | { |
cbf55001 | 1151 | unsigned int busy_flag = 0; |
1da177e4 LT |
1152 | struct socket *sock; |
1153 | ||
1154 | /* | |
89bddce5 | 1155 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1156 | */ |
b69aee04 | 1157 | sock = file->private_data; |
2d48d67f | 1158 | |
cbf55001 | 1159 | if (sk_can_busy_loop(sock->sk)) { |
2d48d67f | 1160 | /* this socket can poll_ll so tell the system call */ |
cbf55001 | 1161 | busy_flag = POLL_BUSY_LOOP; |
2d48d67f ET |
1162 | |
1163 | /* once, only if requested by syscall */ | |
cbf55001 ET |
1164 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
1165 | sk_busy_loop(sock->sk, 1); | |
2d48d67f ET |
1166 | } |
1167 | ||
cbf55001 | 1168 | return busy_flag | sock->ops->poll(file, sock, wait); |
1da177e4 LT |
1169 | } |
1170 | ||
89bddce5 | 1171 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1172 | { |
b69aee04 | 1173 | struct socket *sock = file->private_data; |
1da177e4 LT |
1174 | |
1175 | return sock->ops->mmap(file, sock, vma); | |
1176 | } | |
1177 | ||
20380731 | 1178 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1179 | { |
1da177e4 LT |
1180 | sock_release(SOCKET_I(inode)); |
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * Update the socket async list | |
1186 | * | |
1187 | * Fasync_list locking strategy. | |
1188 | * | |
1189 | * 1. fasync_list is modified only under process context socket lock | |
1190 | * i.e. under semaphore. | |
1191 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1192 | * or under socket lock |
1da177e4 LT |
1193 | */ |
1194 | ||
1195 | static int sock_fasync(int fd, struct file *filp, int on) | |
1196 | { | |
989a2979 ED |
1197 | struct socket *sock = filp->private_data; |
1198 | struct sock *sk = sock->sk; | |
eaefd110 | 1199 | struct socket_wq *wq; |
1da177e4 | 1200 | |
989a2979 | 1201 | if (sk == NULL) |
1da177e4 | 1202 | return -EINVAL; |
1da177e4 LT |
1203 | |
1204 | lock_sock(sk); | |
eaefd110 ED |
1205 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1206 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1207 | |
eaefd110 | 1208 | if (!wq->fasync_list) |
989a2979 ED |
1209 | sock_reset_flag(sk, SOCK_FASYNC); |
1210 | else | |
bcdce719 | 1211 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1212 | |
989a2979 | 1213 | release_sock(sk); |
1da177e4 LT |
1214 | return 0; |
1215 | } | |
1216 | ||
43815482 | 1217 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1218 | |
1219 | int sock_wake_async(struct socket *sock, int how, int band) | |
1220 | { | |
43815482 ED |
1221 | struct socket_wq *wq; |
1222 | ||
1223 | if (!sock) | |
1224 | return -1; | |
1225 | rcu_read_lock(); | |
1226 | wq = rcu_dereference(sock->wq); | |
1227 | if (!wq || !wq->fasync_list) { | |
1228 | rcu_read_unlock(); | |
1da177e4 | 1229 | return -1; |
43815482 | 1230 | } |
89bddce5 | 1231 | switch (how) { |
8d8ad9d7 | 1232 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1233 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1234 | break; | |
1235 | goto call_kill; | |
8d8ad9d7 | 1236 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1237 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1238 | break; | |
1239 | /* fall through */ | |
8d8ad9d7 | 1240 | case SOCK_WAKE_IO: |
89bddce5 | 1241 | call_kill: |
43815482 | 1242 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1243 | break; |
8d8ad9d7 | 1244 | case SOCK_WAKE_URG: |
43815482 | 1245 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1246 | } |
43815482 | 1247 | rcu_read_unlock(); |
1da177e4 LT |
1248 | return 0; |
1249 | } | |
c6d409cf | 1250 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1251 | |
721db93a | 1252 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1253 | struct socket **res, int kern) |
1da177e4 LT |
1254 | { |
1255 | int err; | |
1256 | struct socket *sock; | |
55737fda | 1257 | const struct net_proto_family *pf; |
1da177e4 LT |
1258 | |
1259 | /* | |
89bddce5 | 1260 | * Check protocol is in range |
1da177e4 LT |
1261 | */ |
1262 | if (family < 0 || family >= NPROTO) | |
1263 | return -EAFNOSUPPORT; | |
1264 | if (type < 0 || type >= SOCK_MAX) | |
1265 | return -EINVAL; | |
1266 | ||
1267 | /* Compatibility. | |
1268 | ||
1269 | This uglymoron is moved from INET layer to here to avoid | |
1270 | deadlock in module load. | |
1271 | */ | |
1272 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1273 | static int warned; |
1da177e4 LT |
1274 | if (!warned) { |
1275 | warned = 1; | |
3410f22e YY |
1276 | pr_info("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1277 | current->comm); | |
1da177e4 LT |
1278 | } |
1279 | family = PF_PACKET; | |
1280 | } | |
1281 | ||
1282 | err = security_socket_create(family, type, protocol, kern); | |
1283 | if (err) | |
1284 | return err; | |
89bddce5 | 1285 | |
55737fda SH |
1286 | /* |
1287 | * Allocate the socket and allow the family to set things up. if | |
1288 | * the protocol is 0, the family is instructed to select an appropriate | |
1289 | * default. | |
1290 | */ | |
1291 | sock = sock_alloc(); | |
1292 | if (!sock) { | |
e87cc472 | 1293 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1294 | return -ENFILE; /* Not exactly a match, but its the |
1295 | closest posix thing */ | |
1296 | } | |
1297 | ||
1298 | sock->type = type; | |
1299 | ||
95a5afca | 1300 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1301 | /* Attempt to load a protocol module if the find failed. |
1302 | * | |
1303 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1304 | * requested real, full-featured networking support upon configuration. |
1305 | * Otherwise module support will break! | |
1306 | */ | |
190683a9 | 1307 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1308 | request_module("net-pf-%d", family); |
1da177e4 LT |
1309 | #endif |
1310 | ||
55737fda SH |
1311 | rcu_read_lock(); |
1312 | pf = rcu_dereference(net_families[family]); | |
1313 | err = -EAFNOSUPPORT; | |
1314 | if (!pf) | |
1315 | goto out_release; | |
1da177e4 LT |
1316 | |
1317 | /* | |
1318 | * We will call the ->create function, that possibly is in a loadable | |
1319 | * module, so we have to bump that loadable module refcnt first. | |
1320 | */ | |
55737fda | 1321 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1322 | goto out_release; |
1323 | ||
55737fda SH |
1324 | /* Now protected by module ref count */ |
1325 | rcu_read_unlock(); | |
1326 | ||
3f378b68 | 1327 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1328 | if (err < 0) |
1da177e4 | 1329 | goto out_module_put; |
a79af59e | 1330 | |
1da177e4 LT |
1331 | /* |
1332 | * Now to bump the refcnt of the [loadable] module that owns this | |
1333 | * socket at sock_release time we decrement its refcnt. | |
1334 | */ | |
55737fda SH |
1335 | if (!try_module_get(sock->ops->owner)) |
1336 | goto out_module_busy; | |
1337 | ||
1da177e4 LT |
1338 | /* |
1339 | * Now that we're done with the ->create function, the [loadable] | |
1340 | * module can have its refcnt decremented | |
1341 | */ | |
55737fda | 1342 | module_put(pf->owner); |
7420ed23 VY |
1343 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1344 | if (err) | |
3b185525 | 1345 | goto out_sock_release; |
55737fda | 1346 | *res = sock; |
1da177e4 | 1347 | |
55737fda SH |
1348 | return 0; |
1349 | ||
1350 | out_module_busy: | |
1351 | err = -EAFNOSUPPORT; | |
1da177e4 | 1352 | out_module_put: |
55737fda SH |
1353 | sock->ops = NULL; |
1354 | module_put(pf->owner); | |
1355 | out_sock_release: | |
1da177e4 | 1356 | sock_release(sock); |
55737fda SH |
1357 | return err; |
1358 | ||
1359 | out_release: | |
1360 | rcu_read_unlock(); | |
1361 | goto out_sock_release; | |
1da177e4 | 1362 | } |
721db93a | 1363 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1364 | |
1365 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1366 | { | |
1b8d7ae4 | 1367 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1368 | } |
c6d409cf | 1369 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1370 | |
1371 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1372 | { | |
1b8d7ae4 | 1373 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1374 | } |
c6d409cf | 1375 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1376 | |
3e0fa65f | 1377 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1378 | { |
1379 | int retval; | |
1380 | struct socket *sock; | |
a677a039 UD |
1381 | int flags; |
1382 | ||
e38b36f3 UD |
1383 | /* Check the SOCK_* constants for consistency. */ |
1384 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1385 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1386 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1387 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1388 | ||
a677a039 | 1389 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1390 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1391 | return -EINVAL; |
1392 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1393 | |
aaca0bdc UD |
1394 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1395 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1396 | ||
1da177e4 LT |
1397 | retval = sock_create(family, type, protocol, &sock); |
1398 | if (retval < 0) | |
1399 | goto out; | |
1400 | ||
77d27200 | 1401 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1402 | if (retval < 0) |
1403 | goto out_release; | |
1404 | ||
1405 | out: | |
1406 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1407 | return retval; | |
1408 | ||
1409 | out_release: | |
1410 | sock_release(sock); | |
1411 | return retval; | |
1412 | } | |
1413 | ||
1414 | /* | |
1415 | * Create a pair of connected sockets. | |
1416 | */ | |
1417 | ||
3e0fa65f HC |
1418 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1419 | int __user *, usockvec) | |
1da177e4 LT |
1420 | { |
1421 | struct socket *sock1, *sock2; | |
1422 | int fd1, fd2, err; | |
db349509 | 1423 | struct file *newfile1, *newfile2; |
a677a039 UD |
1424 | int flags; |
1425 | ||
1426 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1427 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1428 | return -EINVAL; |
1429 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1430 | |
aaca0bdc UD |
1431 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1432 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1433 | ||
1da177e4 LT |
1434 | /* |
1435 | * Obtain the first socket and check if the underlying protocol | |
1436 | * supports the socketpair call. | |
1437 | */ | |
1438 | ||
1439 | err = sock_create(family, type, protocol, &sock1); | |
1440 | if (err < 0) | |
1441 | goto out; | |
1442 | ||
1443 | err = sock_create(family, type, protocol, &sock2); | |
1444 | if (err < 0) | |
1445 | goto out_release_1; | |
1446 | ||
1447 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1448 | if (err < 0) |
1da177e4 LT |
1449 | goto out_release_both; |
1450 | ||
28407630 | 1451 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1452 | if (unlikely(fd1 < 0)) { |
1453 | err = fd1; | |
db349509 | 1454 | goto out_release_both; |
bf3c23d1 | 1455 | } |
d73aa286 | 1456 | |
28407630 | 1457 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1458 | if (unlikely(fd2 < 0)) { |
1459 | err = fd2; | |
d73aa286 | 1460 | goto out_put_unused_1; |
28407630 AV |
1461 | } |
1462 | ||
aab174f0 | 1463 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
28407630 AV |
1464 | if (unlikely(IS_ERR(newfile1))) { |
1465 | err = PTR_ERR(newfile1); | |
d73aa286 | 1466 | goto out_put_unused_both; |
28407630 AV |
1467 | } |
1468 | ||
aab174f0 | 1469 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1470 | if (IS_ERR(newfile2)) { |
1471 | err = PTR_ERR(newfile2); | |
d73aa286 | 1472 | goto out_fput_1; |
db349509 AV |
1473 | } |
1474 | ||
d73aa286 YD |
1475 | err = put_user(fd1, &usockvec[0]); |
1476 | if (err) | |
1477 | goto out_fput_both; | |
1478 | ||
1479 | err = put_user(fd2, &usockvec[1]); | |
1480 | if (err) | |
1481 | goto out_fput_both; | |
1482 | ||
157cf649 | 1483 | audit_fd_pair(fd1, fd2); |
d73aa286 | 1484 | |
db349509 AV |
1485 | fd_install(fd1, newfile1); |
1486 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1487 | /* fd1 and fd2 may be already another descriptors. |
1488 | * Not kernel problem. | |
1489 | */ | |
1490 | ||
d73aa286 | 1491 | return 0; |
1da177e4 | 1492 | |
d73aa286 YD |
1493 | out_fput_both: |
1494 | fput(newfile2); | |
1495 | fput(newfile1); | |
1496 | put_unused_fd(fd2); | |
1497 | put_unused_fd(fd1); | |
1498 | goto out; | |
1499 | ||
1500 | out_fput_1: | |
1501 | fput(newfile1); | |
1502 | put_unused_fd(fd2); | |
1503 | put_unused_fd(fd1); | |
1504 | sock_release(sock2); | |
1505 | goto out; | |
1da177e4 | 1506 | |
d73aa286 YD |
1507 | out_put_unused_both: |
1508 | put_unused_fd(fd2); | |
1509 | out_put_unused_1: | |
1510 | put_unused_fd(fd1); | |
1da177e4 | 1511 | out_release_both: |
89bddce5 | 1512 | sock_release(sock2); |
1da177e4 | 1513 | out_release_1: |
89bddce5 | 1514 | sock_release(sock1); |
1da177e4 LT |
1515 | out: |
1516 | return err; | |
1517 | } | |
1518 | ||
1da177e4 LT |
1519 | /* |
1520 | * Bind a name to a socket. Nothing much to do here since it's | |
1521 | * the protocol's responsibility to handle the local address. | |
1522 | * | |
1523 | * We move the socket address to kernel space before we call | |
1524 | * the protocol layer (having also checked the address is ok). | |
1525 | */ | |
1526 | ||
20f37034 | 1527 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1528 | { |
1529 | struct socket *sock; | |
230b1839 | 1530 | struct sockaddr_storage address; |
6cb153ca | 1531 | int err, fput_needed; |
1da177e4 | 1532 | |
89bddce5 | 1533 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1534 | if (sock) { |
43db362d | 1535 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1536 | if (err >= 0) { |
1537 | err = security_socket_bind(sock, | |
230b1839 | 1538 | (struct sockaddr *)&address, |
89bddce5 | 1539 | addrlen); |
6cb153ca BL |
1540 | if (!err) |
1541 | err = sock->ops->bind(sock, | |
89bddce5 | 1542 | (struct sockaddr *) |
230b1839 | 1543 | &address, addrlen); |
1da177e4 | 1544 | } |
6cb153ca | 1545 | fput_light(sock->file, fput_needed); |
89bddce5 | 1546 | } |
1da177e4 LT |
1547 | return err; |
1548 | } | |
1549 | ||
1da177e4 LT |
1550 | /* |
1551 | * Perform a listen. Basically, we allow the protocol to do anything | |
1552 | * necessary for a listen, and if that works, we mark the socket as | |
1553 | * ready for listening. | |
1554 | */ | |
1555 | ||
3e0fa65f | 1556 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1557 | { |
1558 | struct socket *sock; | |
6cb153ca | 1559 | int err, fput_needed; |
b8e1f9b5 | 1560 | int somaxconn; |
89bddce5 SH |
1561 | |
1562 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1563 | if (sock) { | |
8efa6e93 | 1564 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1565 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1566 | backlog = somaxconn; |
1da177e4 LT |
1567 | |
1568 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1569 | if (!err) |
1570 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1571 | |
6cb153ca | 1572 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1573 | } |
1574 | return err; | |
1575 | } | |
1576 | ||
1da177e4 LT |
1577 | /* |
1578 | * For accept, we attempt to create a new socket, set up the link | |
1579 | * with the client, wake up the client, then return the new | |
1580 | * connected fd. We collect the address of the connector in kernel | |
1581 | * space and move it to user at the very end. This is unclean because | |
1582 | * we open the socket then return an error. | |
1583 | * | |
1584 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1585 | * status to recvmsg. We need to add that support in a way thats | |
1586 | * clean when we restucture accept also. | |
1587 | */ | |
1588 | ||
20f37034 HC |
1589 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1590 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1591 | { |
1592 | struct socket *sock, *newsock; | |
39d8c1b6 | 1593 | struct file *newfile; |
6cb153ca | 1594 | int err, len, newfd, fput_needed; |
230b1839 | 1595 | struct sockaddr_storage address; |
1da177e4 | 1596 | |
77d27200 | 1597 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1598 | return -EINVAL; |
1599 | ||
1600 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1601 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1602 | ||
6cb153ca | 1603 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1604 | if (!sock) |
1605 | goto out; | |
1606 | ||
1607 | err = -ENFILE; | |
c6d409cf ED |
1608 | newsock = sock_alloc(); |
1609 | if (!newsock) | |
1da177e4 LT |
1610 | goto out_put; |
1611 | ||
1612 | newsock->type = sock->type; | |
1613 | newsock->ops = sock->ops; | |
1614 | ||
1da177e4 LT |
1615 | /* |
1616 | * We don't need try_module_get here, as the listening socket (sock) | |
1617 | * has the protocol module (sock->ops->owner) held. | |
1618 | */ | |
1619 | __module_get(newsock->ops->owner); | |
1620 | ||
28407630 | 1621 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1622 | if (unlikely(newfd < 0)) { |
1623 | err = newfd; | |
9a1875e6 DM |
1624 | sock_release(newsock); |
1625 | goto out_put; | |
39d8c1b6 | 1626 | } |
aab174f0 | 1627 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
28407630 AV |
1628 | if (unlikely(IS_ERR(newfile))) { |
1629 | err = PTR_ERR(newfile); | |
1630 | put_unused_fd(newfd); | |
1631 | sock_release(newsock); | |
1632 | goto out_put; | |
1633 | } | |
39d8c1b6 | 1634 | |
a79af59e FF |
1635 | err = security_socket_accept(sock, newsock); |
1636 | if (err) | |
39d8c1b6 | 1637 | goto out_fd; |
a79af59e | 1638 | |
1da177e4 LT |
1639 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1640 | if (err < 0) | |
39d8c1b6 | 1641 | goto out_fd; |
1da177e4 LT |
1642 | |
1643 | if (upeer_sockaddr) { | |
230b1839 | 1644 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1645 | &len, 2) < 0) { |
1da177e4 | 1646 | err = -ECONNABORTED; |
39d8c1b6 | 1647 | goto out_fd; |
1da177e4 | 1648 | } |
43db362d | 1649 | err = move_addr_to_user(&address, |
230b1839 | 1650 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1651 | if (err < 0) |
39d8c1b6 | 1652 | goto out_fd; |
1da177e4 LT |
1653 | } |
1654 | ||
1655 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1656 | ||
39d8c1b6 DM |
1657 | fd_install(newfd, newfile); |
1658 | err = newfd; | |
1da177e4 | 1659 | |
1da177e4 | 1660 | out_put: |
6cb153ca | 1661 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1662 | out: |
1663 | return err; | |
39d8c1b6 | 1664 | out_fd: |
9606a216 | 1665 | fput(newfile); |
39d8c1b6 | 1666 | put_unused_fd(newfd); |
1da177e4 LT |
1667 | goto out_put; |
1668 | } | |
1669 | ||
20f37034 HC |
1670 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1671 | int __user *, upeer_addrlen) | |
aaca0bdc | 1672 | { |
de11defe | 1673 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1674 | } |
1675 | ||
1da177e4 LT |
1676 | /* |
1677 | * Attempt to connect to a socket with the server address. The address | |
1678 | * is in user space so we verify it is OK and move it to kernel space. | |
1679 | * | |
1680 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1681 | * break bindings | |
1682 | * | |
1683 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1684 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1685 | * include the -EINPROGRESS status for such sockets. | |
1686 | */ | |
1687 | ||
20f37034 HC |
1688 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1689 | int, addrlen) | |
1da177e4 LT |
1690 | { |
1691 | struct socket *sock; | |
230b1839 | 1692 | struct sockaddr_storage address; |
6cb153ca | 1693 | int err, fput_needed; |
1da177e4 | 1694 | |
6cb153ca | 1695 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1696 | if (!sock) |
1697 | goto out; | |
43db362d | 1698 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1699 | if (err < 0) |
1700 | goto out_put; | |
1701 | ||
89bddce5 | 1702 | err = |
230b1839 | 1703 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1704 | if (err) |
1705 | goto out_put; | |
1706 | ||
230b1839 | 1707 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1708 | sock->file->f_flags); |
1709 | out_put: | |
6cb153ca | 1710 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1711 | out: |
1712 | return err; | |
1713 | } | |
1714 | ||
1715 | /* | |
1716 | * Get the local address ('name') of a socket object. Move the obtained | |
1717 | * name to user space. | |
1718 | */ | |
1719 | ||
20f37034 HC |
1720 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1721 | int __user *, usockaddr_len) | |
1da177e4 LT |
1722 | { |
1723 | struct socket *sock; | |
230b1839 | 1724 | struct sockaddr_storage address; |
6cb153ca | 1725 | int len, err, fput_needed; |
89bddce5 | 1726 | |
6cb153ca | 1727 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1728 | if (!sock) |
1729 | goto out; | |
1730 | ||
1731 | err = security_socket_getsockname(sock); | |
1732 | if (err) | |
1733 | goto out_put; | |
1734 | ||
230b1839 | 1735 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1736 | if (err) |
1737 | goto out_put; | |
43db362d | 1738 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1739 | |
1740 | out_put: | |
6cb153ca | 1741 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1742 | out: |
1743 | return err; | |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * Get the remote address ('name') of a socket object. Move the obtained | |
1748 | * name to user space. | |
1749 | */ | |
1750 | ||
20f37034 HC |
1751 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1752 | int __user *, usockaddr_len) | |
1da177e4 LT |
1753 | { |
1754 | struct socket *sock; | |
230b1839 | 1755 | struct sockaddr_storage address; |
6cb153ca | 1756 | int len, err, fput_needed; |
1da177e4 | 1757 | |
89bddce5 SH |
1758 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1759 | if (sock != NULL) { | |
1da177e4 LT |
1760 | err = security_socket_getpeername(sock); |
1761 | if (err) { | |
6cb153ca | 1762 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1763 | return err; |
1764 | } | |
1765 | ||
89bddce5 | 1766 | err = |
230b1839 | 1767 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1768 | 1); |
1da177e4 | 1769 | if (!err) |
43db362d | 1770 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1771 | usockaddr_len); |
6cb153ca | 1772 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1773 | } |
1774 | return err; | |
1775 | } | |
1776 | ||
1777 | /* | |
1778 | * Send a datagram to a given address. We move the address into kernel | |
1779 | * space and check the user space data area is readable before invoking | |
1780 | * the protocol. | |
1781 | */ | |
1782 | ||
3e0fa65f | 1783 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1784 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1785 | int, addr_len) |
1da177e4 LT |
1786 | { |
1787 | struct socket *sock; | |
230b1839 | 1788 | struct sockaddr_storage address; |
1da177e4 LT |
1789 | int err; |
1790 | struct msghdr msg; | |
1791 | struct iovec iov; | |
6cb153ca | 1792 | int fput_needed; |
6cb153ca | 1793 | |
253eacc0 LT |
1794 | if (len > INT_MAX) |
1795 | len = INT_MAX; | |
de0fa95c PE |
1796 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1797 | if (!sock) | |
4387ff75 | 1798 | goto out; |
6cb153ca | 1799 | |
89bddce5 SH |
1800 | iov.iov_base = buff; |
1801 | iov.iov_len = len; | |
1802 | msg.msg_name = NULL; | |
1803 | msg.msg_iov = &iov; | |
1804 | msg.msg_iovlen = 1; | |
1805 | msg.msg_control = NULL; | |
1806 | msg.msg_controllen = 0; | |
1807 | msg.msg_namelen = 0; | |
6cb153ca | 1808 | if (addr) { |
43db362d | 1809 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1810 | if (err < 0) |
1811 | goto out_put; | |
230b1839 | 1812 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1813 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1814 | } |
1815 | if (sock->file->f_flags & O_NONBLOCK) | |
1816 | flags |= MSG_DONTWAIT; | |
1817 | msg.msg_flags = flags; | |
1818 | err = sock_sendmsg(sock, &msg, len); | |
1819 | ||
89bddce5 | 1820 | out_put: |
de0fa95c | 1821 | fput_light(sock->file, fput_needed); |
4387ff75 | 1822 | out: |
1da177e4 LT |
1823 | return err; |
1824 | } | |
1825 | ||
1826 | /* | |
89bddce5 | 1827 | * Send a datagram down a socket. |
1da177e4 LT |
1828 | */ |
1829 | ||
3e0fa65f | 1830 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1831 | unsigned int, flags) |
1da177e4 LT |
1832 | { |
1833 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1834 | } | |
1835 | ||
1836 | /* | |
89bddce5 | 1837 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1838 | * sender. We verify the buffers are writable and if needed move the |
1839 | * sender address from kernel to user space. | |
1840 | */ | |
1841 | ||
3e0fa65f | 1842 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1843 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1844 | int __user *, addr_len) |
1da177e4 LT |
1845 | { |
1846 | struct socket *sock; | |
1847 | struct iovec iov; | |
1848 | struct msghdr msg; | |
230b1839 | 1849 | struct sockaddr_storage address; |
89bddce5 | 1850 | int err, err2; |
6cb153ca BL |
1851 | int fput_needed; |
1852 | ||
253eacc0 LT |
1853 | if (size > INT_MAX) |
1854 | size = INT_MAX; | |
de0fa95c | 1855 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1856 | if (!sock) |
de0fa95c | 1857 | goto out; |
1da177e4 | 1858 | |
89bddce5 SH |
1859 | msg.msg_control = NULL; |
1860 | msg.msg_controllen = 0; | |
1861 | msg.msg_iovlen = 1; | |
1862 | msg.msg_iov = &iov; | |
1863 | iov.iov_len = size; | |
1864 | iov.iov_base = ubuf; | |
f3d33426 HFS |
1865 | /* Save some cycles and don't copy the address if not needed */ |
1866 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1867 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1868 | msg.msg_namelen = 0; | |
1da177e4 LT |
1869 | if (sock->file->f_flags & O_NONBLOCK) |
1870 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1871 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1872 | |
89bddce5 | 1873 | if (err >= 0 && addr != NULL) { |
43db362d | 1874 | err2 = move_addr_to_user(&address, |
230b1839 | 1875 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1876 | if (err2 < 0) |
1877 | err = err2; | |
1da177e4 | 1878 | } |
de0fa95c PE |
1879 | |
1880 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1881 | out: |
1da177e4 LT |
1882 | return err; |
1883 | } | |
1884 | ||
1885 | /* | |
89bddce5 | 1886 | * Receive a datagram from a socket. |
1da177e4 LT |
1887 | */ |
1888 | ||
b7c0ddf5 JG |
1889 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
1890 | unsigned int, flags) | |
1da177e4 LT |
1891 | { |
1892 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1893 | } | |
1894 | ||
1895 | /* | |
1896 | * Set a socket option. Because we don't know the option lengths we have | |
1897 | * to pass the user mode parameter for the protocols to sort out. | |
1898 | */ | |
1899 | ||
20f37034 HC |
1900 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1901 | char __user *, optval, int, optlen) | |
1da177e4 | 1902 | { |
6cb153ca | 1903 | int err, fput_needed; |
1da177e4 LT |
1904 | struct socket *sock; |
1905 | ||
1906 | if (optlen < 0) | |
1907 | return -EINVAL; | |
89bddce5 SH |
1908 | |
1909 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1910 | if (sock != NULL) { | |
1911 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1912 | if (err) |
1913 | goto out_put; | |
1da177e4 LT |
1914 | |
1915 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1916 | err = |
1917 | sock_setsockopt(sock, level, optname, optval, | |
1918 | optlen); | |
1da177e4 | 1919 | else |
89bddce5 SH |
1920 | err = |
1921 | sock->ops->setsockopt(sock, level, optname, optval, | |
1922 | optlen); | |
6cb153ca BL |
1923 | out_put: |
1924 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1925 | } |
1926 | return err; | |
1927 | } | |
1928 | ||
1929 | /* | |
1930 | * Get a socket option. Because we don't know the option lengths we have | |
1931 | * to pass a user mode parameter for the protocols to sort out. | |
1932 | */ | |
1933 | ||
20f37034 HC |
1934 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1935 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1936 | { |
6cb153ca | 1937 | int err, fput_needed; |
1da177e4 LT |
1938 | struct socket *sock; |
1939 | ||
89bddce5 SH |
1940 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1941 | if (sock != NULL) { | |
6cb153ca BL |
1942 | err = security_socket_getsockopt(sock, level, optname); |
1943 | if (err) | |
1944 | goto out_put; | |
1da177e4 LT |
1945 | |
1946 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1947 | err = |
1948 | sock_getsockopt(sock, level, optname, optval, | |
1949 | optlen); | |
1da177e4 | 1950 | else |
89bddce5 SH |
1951 | err = |
1952 | sock->ops->getsockopt(sock, level, optname, optval, | |
1953 | optlen); | |
6cb153ca BL |
1954 | out_put: |
1955 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1956 | } |
1957 | return err; | |
1958 | } | |
1959 | ||
1da177e4 LT |
1960 | /* |
1961 | * Shutdown a socket. | |
1962 | */ | |
1963 | ||
754fe8d2 | 1964 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1965 | { |
6cb153ca | 1966 | int err, fput_needed; |
1da177e4 LT |
1967 | struct socket *sock; |
1968 | ||
89bddce5 SH |
1969 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1970 | if (sock != NULL) { | |
1da177e4 | 1971 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1972 | if (!err) |
1973 | err = sock->ops->shutdown(sock, how); | |
1974 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1975 | } |
1976 | return err; | |
1977 | } | |
1978 | ||
89bddce5 | 1979 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1980 | * fields which are the same type (int / unsigned) on our platforms. |
1981 | */ | |
1982 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1983 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1984 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1985 | ||
c71d8ebe TH |
1986 | struct used_address { |
1987 | struct sockaddr_storage name; | |
1988 | unsigned int name_len; | |
1989 | }; | |
1990 | ||
1661bf36 DC |
1991 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
1992 | struct msghdr __user *umsg) | |
1993 | { | |
1994 | if (copy_from_user(kmsg, umsg, sizeof(struct msghdr))) | |
1995 | return -EFAULT; | |
dbb490b9 | 1996 | |
6a2a2b3a AS |
1997 | if (kmsg->msg_name == NULL) |
1998 | kmsg->msg_namelen = 0; | |
1999 | ||
dbb490b9 ML |
2000 | if (kmsg->msg_namelen < 0) |
2001 | return -EINVAL; | |
2002 | ||
1661bf36 | 2003 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 2004 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
1661bf36 DC |
2005 | return 0; |
2006 | } | |
2007 | ||
a7526eb5 | 2008 | static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2009 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 2010 | struct used_address *used_address) |
1da177e4 | 2011 | { |
89bddce5 SH |
2012 | struct compat_msghdr __user *msg_compat = |
2013 | (struct compat_msghdr __user *)msg; | |
230b1839 | 2014 | struct sockaddr_storage address; |
1da177e4 | 2015 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 2016 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
2017 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
2018 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 2019 | unsigned char *ctl_buf = ctl; |
a74e9106 | 2020 | int err, ctl_len, total_len; |
89bddce5 | 2021 | |
1da177e4 LT |
2022 | err = -EFAULT; |
2023 | if (MSG_CMSG_COMPAT & flags) { | |
228e548e | 2024 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2025 | return -EFAULT; |
1661bf36 DC |
2026 | } else { |
2027 | err = copy_msghdr_from_user(msg_sys, msg); | |
2028 | if (err) | |
2029 | return err; | |
2030 | } | |
1da177e4 | 2031 | |
228e548e | 2032 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2033 | err = -EMSGSIZE; |
2034 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2035 | goto out; | |
2036 | err = -ENOMEM; | |
2037 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2038 | GFP_KERNEL); | |
1da177e4 | 2039 | if (!iov) |
228e548e | 2040 | goto out; |
1da177e4 LT |
2041 | } |
2042 | ||
2043 | /* This will also move the address data into kernel space */ | |
2044 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2045 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 2046 | } else |
43db362d | 2047 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 2048 | if (err < 0) |
1da177e4 LT |
2049 | goto out_freeiov; |
2050 | total_len = err; | |
2051 | ||
2052 | err = -ENOBUFS; | |
2053 | ||
228e548e | 2054 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2055 | goto out_freeiov; |
228e548e | 2056 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2057 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2058 | err = |
228e548e | 2059 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2060 | sizeof(ctl)); |
1da177e4 LT |
2061 | if (err) |
2062 | goto out_freeiov; | |
228e548e AB |
2063 | ctl_buf = msg_sys->msg_control; |
2064 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2065 | } else if (ctl_len) { |
89bddce5 | 2066 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2067 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2068 | if (ctl_buf == NULL) |
1da177e4 LT |
2069 | goto out_freeiov; |
2070 | } | |
2071 | err = -EFAULT; | |
2072 | /* | |
228e548e | 2073 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2074 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2075 | * checking falls down on this. | |
2076 | */ | |
fb8621bb | 2077 | if (copy_from_user(ctl_buf, |
228e548e | 2078 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2079 | ctl_len)) |
1da177e4 | 2080 | goto out_freectl; |
228e548e | 2081 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2082 | } |
228e548e | 2083 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2084 | |
2085 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2086 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2087 | /* |
2088 | * If this is sendmmsg() and current destination address is same as | |
2089 | * previously succeeded address, omit asking LSM's decision. | |
2090 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2091 | * destination address never matches. | |
2092 | */ | |
bc909d9d MD |
2093 | if (used_address && msg_sys->msg_name && |
2094 | used_address->name_len == msg_sys->msg_namelen && | |
2095 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2096 | used_address->name_len)) { |
2097 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2098 | goto out_freectl; | |
2099 | } | |
2100 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2101 | /* | |
2102 | * If this is sendmmsg() and sending to current destination address was | |
2103 | * successful, remember it. | |
2104 | */ | |
2105 | if (used_address && err >= 0) { | |
2106 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2107 | if (msg_sys->msg_name) |
2108 | memcpy(&used_address->name, msg_sys->msg_name, | |
2109 | used_address->name_len); | |
c71d8ebe | 2110 | } |
1da177e4 LT |
2111 | |
2112 | out_freectl: | |
89bddce5 | 2113 | if (ctl_buf != ctl) |
1da177e4 LT |
2114 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2115 | out_freeiov: | |
2116 | if (iov != iovstack) | |
a74e9106 | 2117 | kfree(iov); |
228e548e AB |
2118 | out: |
2119 | return err; | |
2120 | } | |
2121 | ||
2122 | /* | |
2123 | * BSD sendmsg interface | |
2124 | */ | |
2125 | ||
a7526eb5 | 2126 | long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
228e548e AB |
2127 | { |
2128 | int fput_needed, err; | |
2129 | struct msghdr msg_sys; | |
1be374a0 AL |
2130 | struct socket *sock; |
2131 | ||
1be374a0 | 2132 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2133 | if (!sock) |
2134 | goto out; | |
2135 | ||
a7526eb5 | 2136 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2137 | |
6cb153ca | 2138 | fput_light(sock->file, fput_needed); |
89bddce5 | 2139 | out: |
1da177e4 LT |
2140 | return err; |
2141 | } | |
2142 | ||
a7526eb5 AL |
2143 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
2144 | { | |
2145 | if (flags & MSG_CMSG_COMPAT) | |
2146 | return -EINVAL; | |
2147 | return __sys_sendmsg(fd, msg, flags); | |
2148 | } | |
2149 | ||
228e548e AB |
2150 | /* |
2151 | * Linux sendmmsg interface | |
2152 | */ | |
2153 | ||
2154 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2155 | unsigned int flags) | |
2156 | { | |
2157 | int fput_needed, err, datagrams; | |
2158 | struct socket *sock; | |
2159 | struct mmsghdr __user *entry; | |
2160 | struct compat_mmsghdr __user *compat_entry; | |
2161 | struct msghdr msg_sys; | |
c71d8ebe | 2162 | struct used_address used_address; |
228e548e | 2163 | |
98382f41 AB |
2164 | if (vlen > UIO_MAXIOV) |
2165 | vlen = UIO_MAXIOV; | |
228e548e AB |
2166 | |
2167 | datagrams = 0; | |
2168 | ||
2169 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2170 | if (!sock) | |
2171 | return err; | |
2172 | ||
c71d8ebe | 2173 | used_address.name_len = UINT_MAX; |
228e548e AB |
2174 | entry = mmsg; |
2175 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2176 | err = 0; |
228e548e AB |
2177 | |
2178 | while (datagrams < vlen) { | |
228e548e | 2179 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2180 | err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
2181 | &msg_sys, flags, &used_address); | |
228e548e AB |
2182 | if (err < 0) |
2183 | break; | |
2184 | err = __put_user(err, &compat_entry->msg_len); | |
2185 | ++compat_entry; | |
2186 | } else { | |
a7526eb5 AL |
2187 | err = ___sys_sendmsg(sock, |
2188 | (struct msghdr __user *)entry, | |
2189 | &msg_sys, flags, &used_address); | |
228e548e AB |
2190 | if (err < 0) |
2191 | break; | |
2192 | err = put_user(err, &entry->msg_len); | |
2193 | ++entry; | |
2194 | } | |
2195 | ||
2196 | if (err) | |
2197 | break; | |
2198 | ++datagrams; | |
2199 | } | |
2200 | ||
228e548e AB |
2201 | fput_light(sock->file, fput_needed); |
2202 | ||
728ffb86 AB |
2203 | /* We only return an error if no datagrams were able to be sent */ |
2204 | if (datagrams != 0) | |
228e548e AB |
2205 | return datagrams; |
2206 | ||
228e548e AB |
2207 | return err; |
2208 | } | |
2209 | ||
2210 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2211 | unsigned int, vlen, unsigned int, flags) | |
2212 | { | |
1be374a0 AL |
2213 | if (flags & MSG_CMSG_COMPAT) |
2214 | return -EINVAL; | |
228e548e AB |
2215 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2216 | } | |
2217 | ||
a7526eb5 | 2218 | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2219 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2220 | { |
89bddce5 SH |
2221 | struct compat_msghdr __user *msg_compat = |
2222 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2223 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2224 | struct iovec *iov = iovstack; |
1da177e4 | 2225 | unsigned long cmsg_ptr; |
a74e9106 | 2226 | int err, total_len, len; |
1da177e4 LT |
2227 | |
2228 | /* kernel mode address */ | |
230b1839 | 2229 | struct sockaddr_storage addr; |
1da177e4 LT |
2230 | |
2231 | /* user mode address pointers */ | |
2232 | struct sockaddr __user *uaddr; | |
2233 | int __user *uaddr_len; | |
89bddce5 | 2234 | |
1da177e4 | 2235 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2236 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2237 | return -EFAULT; |
1661bf36 DC |
2238 | } else { |
2239 | err = copy_msghdr_from_user(msg_sys, msg); | |
2240 | if (err) | |
2241 | return err; | |
2242 | } | |
1da177e4 | 2243 | |
a2e27255 | 2244 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2245 | err = -EMSGSIZE; |
2246 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2247 | goto out; | |
2248 | err = -ENOMEM; | |
2249 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2250 | GFP_KERNEL); | |
1da177e4 | 2251 | if (!iov) |
a2e27255 | 2252 | goto out; |
1da177e4 LT |
2253 | } |
2254 | ||
f3d33426 HFS |
2255 | /* Save the user-mode address (verify_iovec will change the |
2256 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2257 | */ |
a2e27255 | 2258 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 | 2259 | uaddr_len = COMPAT_NAMELEN(msg); |
f3d33426 | 2260 | if (MSG_CMSG_COMPAT & flags) |
43db362d | 2261 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
f3d33426 | 2262 | else |
43db362d | 2263 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2264 | if (err < 0) |
2265 | goto out_freeiov; | |
89bddce5 | 2266 | total_len = err; |
1da177e4 | 2267 | |
a2e27255 ACM |
2268 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2269 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2270 | |
f3d33426 HFS |
2271 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2272 | msg_sys->msg_namelen = 0; | |
2273 | ||
1da177e4 LT |
2274 | if (sock->file->f_flags & O_NONBLOCK) |
2275 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2276 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2277 | total_len, flags); | |
1da177e4 LT |
2278 | if (err < 0) |
2279 | goto out_freeiov; | |
2280 | len = err; | |
2281 | ||
2282 | if (uaddr != NULL) { | |
43db362d | 2283 | err = move_addr_to_user(&addr, |
a2e27255 | 2284 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2285 | uaddr_len); |
1da177e4 LT |
2286 | if (err < 0) |
2287 | goto out_freeiov; | |
2288 | } | |
a2e27255 | 2289 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2290 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2291 | if (err) |
2292 | goto out_freeiov; | |
2293 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2294 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2295 | &msg_compat->msg_controllen); |
2296 | else | |
a2e27255 | 2297 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2298 | &msg->msg_controllen); |
2299 | if (err) | |
2300 | goto out_freeiov; | |
2301 | err = len; | |
2302 | ||
2303 | out_freeiov: | |
2304 | if (iov != iovstack) | |
a74e9106 | 2305 | kfree(iov); |
a2e27255 ACM |
2306 | out: |
2307 | return err; | |
2308 | } | |
2309 | ||
2310 | /* | |
2311 | * BSD recvmsg interface | |
2312 | */ | |
2313 | ||
a7526eb5 | 2314 | long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2315 | { |
2316 | int fput_needed, err; | |
2317 | struct msghdr msg_sys; | |
1be374a0 AL |
2318 | struct socket *sock; |
2319 | ||
1be374a0 | 2320 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2321 | if (!sock) |
2322 | goto out; | |
2323 | ||
a7526eb5 | 2324 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2325 | |
6cb153ca | 2326 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2327 | out: |
2328 | return err; | |
2329 | } | |
2330 | ||
a7526eb5 AL |
2331 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
2332 | unsigned int, flags) | |
2333 | { | |
2334 | if (flags & MSG_CMSG_COMPAT) | |
2335 | return -EINVAL; | |
2336 | return __sys_recvmsg(fd, msg, flags); | |
2337 | } | |
2338 | ||
a2e27255 ACM |
2339 | /* |
2340 | * Linux recvmmsg interface | |
2341 | */ | |
2342 | ||
2343 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2344 | unsigned int flags, struct timespec *timeout) | |
2345 | { | |
2346 | int fput_needed, err, datagrams; | |
2347 | struct socket *sock; | |
2348 | struct mmsghdr __user *entry; | |
d7256d0e | 2349 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2350 | struct msghdr msg_sys; |
2351 | struct timespec end_time; | |
2352 | ||
2353 | if (timeout && | |
2354 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2355 | timeout->tv_nsec)) | |
2356 | return -EINVAL; | |
2357 | ||
2358 | datagrams = 0; | |
2359 | ||
2360 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2361 | if (!sock) | |
2362 | return err; | |
2363 | ||
2364 | err = sock_error(sock->sk); | |
2365 | if (err) | |
2366 | goto out_put; | |
2367 | ||
2368 | entry = mmsg; | |
d7256d0e | 2369 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2370 | |
2371 | while (datagrams < vlen) { | |
2372 | /* | |
2373 | * No need to ask LSM for more than the first datagram. | |
2374 | */ | |
d7256d0e | 2375 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2376 | err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
2377 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2378 | datagrams); | |
d7256d0e JMG |
2379 | if (err < 0) |
2380 | break; | |
2381 | err = __put_user(err, &compat_entry->msg_len); | |
2382 | ++compat_entry; | |
2383 | } else { | |
a7526eb5 AL |
2384 | err = ___sys_recvmsg(sock, |
2385 | (struct msghdr __user *)entry, | |
2386 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2387 | datagrams); | |
d7256d0e JMG |
2388 | if (err < 0) |
2389 | break; | |
2390 | err = put_user(err, &entry->msg_len); | |
2391 | ++entry; | |
2392 | } | |
2393 | ||
a2e27255 ACM |
2394 | if (err) |
2395 | break; | |
a2e27255 ACM |
2396 | ++datagrams; |
2397 | ||
71c5c159 BB |
2398 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2399 | if (flags & MSG_WAITFORONE) | |
2400 | flags |= MSG_DONTWAIT; | |
2401 | ||
a2e27255 ACM |
2402 | if (timeout) { |
2403 | ktime_get_ts(timeout); | |
2404 | *timeout = timespec_sub(end_time, *timeout); | |
2405 | if (timeout->tv_sec < 0) { | |
2406 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2407 | break; | |
2408 | } | |
2409 | ||
2410 | /* Timeout, return less than vlen datagrams */ | |
2411 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2412 | break; | |
2413 | } | |
2414 | ||
2415 | /* Out of band data, return right away */ | |
2416 | if (msg_sys.msg_flags & MSG_OOB) | |
2417 | break; | |
2418 | } | |
2419 | ||
2420 | out_put: | |
2421 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2422 | |
a2e27255 ACM |
2423 | if (err == 0) |
2424 | return datagrams; | |
2425 | ||
2426 | if (datagrams != 0) { | |
2427 | /* | |
2428 | * We may return less entries than requested (vlen) if the | |
2429 | * sock is non block and there aren't enough datagrams... | |
2430 | */ | |
2431 | if (err != -EAGAIN) { | |
2432 | /* | |
2433 | * ... or if recvmsg returns an error after we | |
2434 | * received some datagrams, where we record the | |
2435 | * error to return on the next call or if the | |
2436 | * app asks about it using getsockopt(SO_ERROR). | |
2437 | */ | |
2438 | sock->sk->sk_err = -err; | |
2439 | } | |
2440 | ||
2441 | return datagrams; | |
2442 | } | |
2443 | ||
2444 | return err; | |
2445 | } | |
2446 | ||
2447 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2448 | unsigned int, vlen, unsigned int, flags, | |
2449 | struct timespec __user *, timeout) | |
2450 | { | |
2451 | int datagrams; | |
2452 | struct timespec timeout_sys; | |
2453 | ||
1be374a0 AL |
2454 | if (flags & MSG_CMSG_COMPAT) |
2455 | return -EINVAL; | |
2456 | ||
a2e27255 ACM |
2457 | if (!timeout) |
2458 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2459 | ||
2460 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2461 | return -EFAULT; | |
2462 | ||
2463 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2464 | ||
2465 | if (datagrams > 0 && | |
2466 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2467 | datagrams = -EFAULT; | |
2468 | ||
2469 | return datagrams; | |
2470 | } | |
2471 | ||
2472 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2473 | /* Argument list sizes for sys_socketcall */ |
2474 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2475 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2476 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2477 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2478 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2479 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2480 | }; |
2481 | ||
1da177e4 LT |
2482 | #undef AL |
2483 | ||
2484 | /* | |
89bddce5 | 2485 | * System call vectors. |
1da177e4 LT |
2486 | * |
2487 | * Argument checking cleaned up. Saved 20% in size. | |
2488 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2489 | * it is set by the callees. |
1da177e4 LT |
2490 | */ |
2491 | ||
3e0fa65f | 2492 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2493 | { |
2950fa9d | 2494 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2495 | unsigned long a0, a1; |
1da177e4 | 2496 | int err; |
47379052 | 2497 | unsigned int len; |
1da177e4 | 2498 | |
228e548e | 2499 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2500 | return -EINVAL; |
2501 | ||
47379052 AV |
2502 | len = nargs[call]; |
2503 | if (len > sizeof(a)) | |
2504 | return -EINVAL; | |
2505 | ||
1da177e4 | 2506 | /* copy_from_user should be SMP safe. */ |
47379052 | 2507 | if (copy_from_user(a, args, len)) |
1da177e4 | 2508 | return -EFAULT; |
3ec3b2fb | 2509 | |
2950fa9d CG |
2510 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2511 | if (err) | |
2512 | return err; | |
3ec3b2fb | 2513 | |
89bddce5 SH |
2514 | a0 = a[0]; |
2515 | a1 = a[1]; | |
2516 | ||
2517 | switch (call) { | |
2518 | case SYS_SOCKET: | |
2519 | err = sys_socket(a0, a1, a[2]); | |
2520 | break; | |
2521 | case SYS_BIND: | |
2522 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2523 | break; | |
2524 | case SYS_CONNECT: | |
2525 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2526 | break; | |
2527 | case SYS_LISTEN: | |
2528 | err = sys_listen(a0, a1); | |
2529 | break; | |
2530 | case SYS_ACCEPT: | |
de11defe UD |
2531 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2532 | (int __user *)a[2], 0); | |
89bddce5 SH |
2533 | break; |
2534 | case SYS_GETSOCKNAME: | |
2535 | err = | |
2536 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2537 | (int __user *)a[2]); | |
2538 | break; | |
2539 | case SYS_GETPEERNAME: | |
2540 | err = | |
2541 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2542 | (int __user *)a[2]); | |
2543 | break; | |
2544 | case SYS_SOCKETPAIR: | |
2545 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2546 | break; | |
2547 | case SYS_SEND: | |
2548 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2549 | break; | |
2550 | case SYS_SENDTO: | |
2551 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2552 | (struct sockaddr __user *)a[4], a[5]); | |
2553 | break; | |
2554 | case SYS_RECV: | |
2555 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2556 | break; | |
2557 | case SYS_RECVFROM: | |
2558 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2559 | (struct sockaddr __user *)a[4], | |
2560 | (int __user *)a[5]); | |
2561 | break; | |
2562 | case SYS_SHUTDOWN: | |
2563 | err = sys_shutdown(a0, a1); | |
2564 | break; | |
2565 | case SYS_SETSOCKOPT: | |
2566 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2567 | break; | |
2568 | case SYS_GETSOCKOPT: | |
2569 | err = | |
2570 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2571 | (int __user *)a[4]); | |
2572 | break; | |
2573 | case SYS_SENDMSG: | |
2574 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2575 | break; | |
228e548e AB |
2576 | case SYS_SENDMMSG: |
2577 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2578 | break; | |
89bddce5 SH |
2579 | case SYS_RECVMSG: |
2580 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2581 | break; | |
a2e27255 ACM |
2582 | case SYS_RECVMMSG: |
2583 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2584 | (struct timespec __user *)a[4]); | |
2585 | break; | |
de11defe UD |
2586 | case SYS_ACCEPT4: |
2587 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2588 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2589 | break; |
89bddce5 SH |
2590 | default: |
2591 | err = -EINVAL; | |
2592 | break; | |
1da177e4 LT |
2593 | } |
2594 | return err; | |
2595 | } | |
2596 | ||
89bddce5 | 2597 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2598 | |
55737fda SH |
2599 | /** |
2600 | * sock_register - add a socket protocol handler | |
2601 | * @ops: description of protocol | |
2602 | * | |
1da177e4 LT |
2603 | * This function is called by a protocol handler that wants to |
2604 | * advertise its address family, and have it linked into the | |
e793c0f7 | 2605 | * socket interface. The value ops->family corresponds to the |
55737fda | 2606 | * socket system call protocol family. |
1da177e4 | 2607 | */ |
f0fd27d4 | 2608 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2609 | { |
2610 | int err; | |
2611 | ||
2612 | if (ops->family >= NPROTO) { | |
3410f22e | 2613 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
1da177e4 LT |
2614 | return -ENOBUFS; |
2615 | } | |
55737fda SH |
2616 | |
2617 | spin_lock(&net_family_lock); | |
190683a9 ED |
2618 | if (rcu_dereference_protected(net_families[ops->family], |
2619 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2620 | err = -EEXIST; |
2621 | else { | |
cf778b00 | 2622 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2623 | err = 0; |
2624 | } | |
55737fda SH |
2625 | spin_unlock(&net_family_lock); |
2626 | ||
3410f22e | 2627 | pr_info("NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2628 | return err; |
2629 | } | |
c6d409cf | 2630 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2631 | |
55737fda SH |
2632 | /** |
2633 | * sock_unregister - remove a protocol handler | |
2634 | * @family: protocol family to remove | |
2635 | * | |
1da177e4 LT |
2636 | * This function is called by a protocol handler that wants to |
2637 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2638 | * new socket creation. |
2639 | * | |
2640 | * If protocol handler is a module, then it can use module reference | |
2641 | * counts to protect against new references. If protocol handler is not | |
2642 | * a module then it needs to provide its own protection in | |
2643 | * the ops->create routine. | |
1da177e4 | 2644 | */ |
f0fd27d4 | 2645 | void sock_unregister(int family) |
1da177e4 | 2646 | { |
f0fd27d4 | 2647 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2648 | |
55737fda | 2649 | spin_lock(&net_family_lock); |
a9b3cd7f | 2650 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2651 | spin_unlock(&net_family_lock); |
2652 | ||
2653 | synchronize_rcu(); | |
2654 | ||
3410f22e | 2655 | pr_info("NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2656 | } |
c6d409cf | 2657 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2658 | |
77d76ea3 | 2659 | static int __init sock_init(void) |
1da177e4 | 2660 | { |
b3e19d92 | 2661 | int err; |
2ca794e5 EB |
2662 | /* |
2663 | * Initialize the network sysctl infrastructure. | |
2664 | */ | |
2665 | err = net_sysctl_init(); | |
2666 | if (err) | |
2667 | goto out; | |
b3e19d92 | 2668 | |
1da177e4 | 2669 | /* |
89bddce5 | 2670 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2671 | */ |
2672 | skb_init(); | |
1da177e4 LT |
2673 | |
2674 | /* | |
89bddce5 | 2675 | * Initialize the protocols module. |
1da177e4 LT |
2676 | */ |
2677 | ||
2678 | init_inodecache(); | |
b3e19d92 NP |
2679 | |
2680 | err = register_filesystem(&sock_fs_type); | |
2681 | if (err) | |
2682 | goto out_fs; | |
1da177e4 | 2683 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2684 | if (IS_ERR(sock_mnt)) { |
2685 | err = PTR_ERR(sock_mnt); | |
2686 | goto out_mount; | |
2687 | } | |
77d76ea3 AK |
2688 | |
2689 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2690 | */ |
2691 | ||
2692 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2693 | err = netfilter_init(); |
2694 | if (err) | |
2695 | goto out; | |
1da177e4 | 2696 | #endif |
cbeb321a | 2697 | |
408eccce | 2698 | ptp_classifier_init(); |
c1f19b51 | 2699 | |
b3e19d92 NP |
2700 | out: |
2701 | return err; | |
2702 | ||
2703 | out_mount: | |
2704 | unregister_filesystem(&sock_fs_type); | |
2705 | out_fs: | |
2706 | goto out; | |
1da177e4 LT |
2707 | } |
2708 | ||
77d76ea3 AK |
2709 | core_initcall(sock_init); /* early initcall */ |
2710 | ||
1da177e4 LT |
2711 | #ifdef CONFIG_PROC_FS |
2712 | void socket_seq_show(struct seq_file *seq) | |
2713 | { | |
2714 | int cpu; | |
2715 | int counter = 0; | |
2716 | ||
6f912042 | 2717 | for_each_possible_cpu(cpu) |
89bddce5 | 2718 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2719 | |
2720 | /* It can be negative, by the way. 8) */ | |
2721 | if (counter < 0) | |
2722 | counter = 0; | |
2723 | ||
2724 | seq_printf(seq, "sockets: used %d\n", counter); | |
2725 | } | |
89bddce5 | 2726 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2727 | |
89bbfc95 | 2728 | #ifdef CONFIG_COMPAT |
6b96018b | 2729 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2730 | unsigned int cmd, void __user *up) |
7a229387 | 2731 | { |
7a229387 AB |
2732 | mm_segment_t old_fs = get_fs(); |
2733 | struct timeval ktv; | |
2734 | int err; | |
2735 | ||
2736 | set_fs(KERNEL_DS); | |
6b96018b | 2737 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2738 | set_fs(old_fs); |
644595f8 | 2739 | if (!err) |
ed6fe9d6 | 2740 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2741 | |
7a229387 AB |
2742 | return err; |
2743 | } | |
2744 | ||
6b96018b | 2745 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2746 | unsigned int cmd, void __user *up) |
7a229387 | 2747 | { |
7a229387 AB |
2748 | mm_segment_t old_fs = get_fs(); |
2749 | struct timespec kts; | |
2750 | int err; | |
2751 | ||
2752 | set_fs(KERNEL_DS); | |
6b96018b | 2753 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2754 | set_fs(old_fs); |
644595f8 | 2755 | if (!err) |
ed6fe9d6 | 2756 | err = compat_put_timespec(&kts, up); |
644595f8 | 2757 | |
7a229387 AB |
2758 | return err; |
2759 | } | |
2760 | ||
6b96018b | 2761 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2762 | { |
2763 | struct ifreq __user *uifr; | |
2764 | int err; | |
2765 | ||
2766 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2767 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2768 | return -EFAULT; |
2769 | ||
6b96018b | 2770 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2771 | if (err) |
2772 | return err; | |
2773 | ||
6b96018b | 2774 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2775 | return -EFAULT; |
2776 | ||
2777 | return 0; | |
2778 | } | |
2779 | ||
6b96018b | 2780 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2781 | { |
6b96018b | 2782 | struct compat_ifconf ifc32; |
7a229387 AB |
2783 | struct ifconf ifc; |
2784 | struct ifconf __user *uifc; | |
6b96018b | 2785 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2786 | struct ifreq __user *ifr; |
2787 | unsigned int i, j; | |
2788 | int err; | |
2789 | ||
6b96018b | 2790 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2791 | return -EFAULT; |
2792 | ||
43da5f2e | 2793 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2794 | if (ifc32.ifcbuf == 0) { |
2795 | ifc32.ifc_len = 0; | |
2796 | ifc.ifc_len = 0; | |
2797 | ifc.ifc_req = NULL; | |
2798 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2799 | } else { | |
c6d409cf ED |
2800 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2801 | sizeof(struct ifreq); | |
7a229387 AB |
2802 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2803 | ifc.ifc_len = len; | |
2804 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2805 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2806 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2807 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2808 | return -EFAULT; |
2809 | ifr++; | |
2810 | ifr32++; | |
2811 | } | |
2812 | } | |
2813 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2814 | return -EFAULT; | |
2815 | ||
6b96018b | 2816 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2817 | if (err) |
2818 | return err; | |
2819 | ||
2820 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2821 | return -EFAULT; | |
2822 | ||
2823 | ifr = ifc.ifc_req; | |
2824 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2825 | for (i = 0, j = 0; | |
c6d409cf ED |
2826 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2827 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2828 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2829 | return -EFAULT; |
2830 | ifr32++; | |
2831 | ifr++; | |
2832 | } | |
2833 | ||
2834 | if (ifc32.ifcbuf == 0) { | |
2835 | /* Translate from 64-bit structure multiple to | |
2836 | * a 32-bit one. | |
2837 | */ | |
2838 | i = ifc.ifc_len; | |
6b96018b | 2839 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2840 | ifc32.ifc_len = i; |
2841 | } else { | |
2842 | ifc32.ifc_len = i; | |
2843 | } | |
6b96018b | 2844 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2845 | return -EFAULT; |
2846 | ||
2847 | return 0; | |
2848 | } | |
2849 | ||
6b96018b | 2850 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2851 | { |
3a7da39d BH |
2852 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2853 | bool convert_in = false, convert_out = false; | |
2854 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2855 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2856 | struct ifreq __user *ifr; |
3a7da39d BH |
2857 | u32 rule_cnt = 0, actual_rule_cnt; |
2858 | u32 ethcmd; | |
7a229387 | 2859 | u32 data; |
3a7da39d | 2860 | int ret; |
7a229387 | 2861 | |
3a7da39d BH |
2862 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2863 | return -EFAULT; | |
7a229387 | 2864 | |
3a7da39d BH |
2865 | compat_rxnfc = compat_ptr(data); |
2866 | ||
2867 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2868 | return -EFAULT; |
2869 | ||
3a7da39d BH |
2870 | /* Most ethtool structures are defined without padding. |
2871 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2872 | */ | |
2873 | switch (ethcmd) { | |
2874 | default: | |
2875 | break; | |
2876 | case ETHTOOL_GRXCLSRLALL: | |
2877 | /* Buffer size is variable */ | |
2878 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2879 | return -EFAULT; | |
2880 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2881 | return -ENOMEM; | |
2882 | buf_size += rule_cnt * sizeof(u32); | |
2883 | /* fall through */ | |
2884 | case ETHTOOL_GRXRINGS: | |
2885 | case ETHTOOL_GRXCLSRLCNT: | |
2886 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2887 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2888 | convert_out = true; |
2889 | /* fall through */ | |
2890 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2891 | buf_size += sizeof(struct ethtool_rxnfc); |
2892 | convert_in = true; | |
2893 | break; | |
2894 | } | |
2895 | ||
2896 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2897 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2898 | |
2899 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2900 | return -EFAULT; |
2901 | ||
3a7da39d BH |
2902 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2903 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2904 | return -EFAULT; |
2905 | ||
3a7da39d | 2906 | if (convert_in) { |
127fe533 | 2907 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2908 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2909 | */ | |
127fe533 AD |
2910 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2911 | sizeof(compat_rxnfc->fs.m_ext) != | |
2912 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2913 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2914 | BUILD_BUG_ON( |
2915 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2916 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2917 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2918 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2919 | ||
2920 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2921 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2922 | (void __user *)rxnfc) || | |
3a7da39d BH |
2923 | copy_in_user(&rxnfc->fs.ring_cookie, |
2924 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2925 | (void __user *)(&rxnfc->fs.location + 1) - |
2926 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2927 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2928 | sizeof(rxnfc->rule_cnt))) | |
2929 | return -EFAULT; | |
2930 | } | |
2931 | ||
2932 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2933 | if (ret) | |
2934 | return ret; | |
2935 | ||
2936 | if (convert_out) { | |
2937 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2938 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2939 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2940 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2941 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2942 | (const void __user *)(&rxnfc->fs.location + 1) - |
2943 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2944 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2945 | sizeof(rxnfc->rule_cnt))) | |
2946 | return -EFAULT; | |
2947 | ||
2948 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2949 | /* As an optimisation, we only copy the actual | |
2950 | * number of rules that the underlying | |
2951 | * function returned. Since Mallory might | |
2952 | * change the rule count in user memory, we | |
2953 | * check that it is less than the rule count | |
2954 | * originally given (as the user buffer size), | |
2955 | * which has been range-checked. | |
2956 | */ | |
2957 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2958 | return -EFAULT; | |
2959 | if (actual_rule_cnt < rule_cnt) | |
2960 | rule_cnt = actual_rule_cnt; | |
2961 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2962 | &rxnfc->rule_locs[0], | |
2963 | rule_cnt * sizeof(u32))) | |
2964 | return -EFAULT; | |
2965 | } | |
2966 | } | |
2967 | ||
2968 | return 0; | |
7a229387 AB |
2969 | } |
2970 | ||
7a50a240 AB |
2971 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2972 | { | |
2973 | void __user *uptr; | |
2974 | compat_uptr_t uptr32; | |
2975 | struct ifreq __user *uifr; | |
2976 | ||
c6d409cf | 2977 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2978 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2979 | return -EFAULT; | |
2980 | ||
2981 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2982 | return -EFAULT; | |
2983 | ||
2984 | uptr = compat_ptr(uptr32); | |
2985 | ||
2986 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2987 | return -EFAULT; | |
2988 | ||
2989 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2990 | } | |
2991 | ||
6b96018b AB |
2992 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2993 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2994 | { |
2995 | struct ifreq kifr; | |
7a229387 AB |
2996 | mm_segment_t old_fs; |
2997 | int err; | |
7a229387 AB |
2998 | |
2999 | switch (cmd) { | |
3000 | case SIOCBONDENSLAVE: | |
3001 | case SIOCBONDRELEASE: | |
3002 | case SIOCBONDSETHWADDR: | |
3003 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 3004 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
3005 | return -EFAULT; |
3006 | ||
3007 | old_fs = get_fs(); | |
c6d409cf | 3008 | set_fs(KERNEL_DS); |
c3f52ae6 | 3009 | err = dev_ioctl(net, cmd, |
3010 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 3011 | set_fs(old_fs); |
7a229387 AB |
3012 | |
3013 | return err; | |
7a229387 | 3014 | default: |
07d106d0 | 3015 | return -ENOIOCTLCMD; |
ccbd6a5a | 3016 | } |
7a229387 AB |
3017 | } |
3018 | ||
590d4693 BH |
3019 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
3020 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, | |
6b96018b | 3021 | struct compat_ifreq __user *u_ifreq32) |
7a229387 AB |
3022 | { |
3023 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
3024 | char tmp_buf[IFNAMSIZ]; |
3025 | void __user *data64; | |
3026 | u32 data32; | |
3027 | ||
3028 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
3029 | IFNAMSIZ)) | |
3030 | return -EFAULT; | |
417c3522 | 3031 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
7a229387 AB |
3032 | return -EFAULT; |
3033 | data64 = compat_ptr(data32); | |
3034 | ||
3035 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
3036 | ||
7a229387 AB |
3037 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
3038 | IFNAMSIZ)) | |
3039 | return -EFAULT; | |
417c3522 | 3040 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
7a229387 AB |
3041 | return -EFAULT; |
3042 | ||
6b96018b | 3043 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
3044 | } |
3045 | ||
6b96018b AB |
3046 | static int dev_ifsioc(struct net *net, struct socket *sock, |
3047 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 3048 | { |
a2116ed2 | 3049 | struct ifreq __user *uifr; |
7a229387 AB |
3050 | int err; |
3051 | ||
a2116ed2 AB |
3052 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
3053 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
3054 | return -EFAULT; | |
3055 | ||
3056 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
3057 | ||
7a229387 AB |
3058 | if (!err) { |
3059 | switch (cmd) { | |
3060 | case SIOCGIFFLAGS: | |
3061 | case SIOCGIFMETRIC: | |
3062 | case SIOCGIFMTU: | |
3063 | case SIOCGIFMEM: | |
3064 | case SIOCGIFHWADDR: | |
3065 | case SIOCGIFINDEX: | |
3066 | case SIOCGIFADDR: | |
3067 | case SIOCGIFBRDADDR: | |
3068 | case SIOCGIFDSTADDR: | |
3069 | case SIOCGIFNETMASK: | |
fab2532b | 3070 | case SIOCGIFPFLAGS: |
7a229387 | 3071 | case SIOCGIFTXQLEN: |
fab2532b AB |
3072 | case SIOCGMIIPHY: |
3073 | case SIOCGMIIREG: | |
a2116ed2 | 3074 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
3075 | err = -EFAULT; |
3076 | break; | |
3077 | } | |
3078 | } | |
3079 | return err; | |
3080 | } | |
3081 | ||
a2116ed2 AB |
3082 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3083 | struct compat_ifreq __user *uifr32) | |
3084 | { | |
3085 | struct ifreq ifr; | |
3086 | struct compat_ifmap __user *uifmap32; | |
3087 | mm_segment_t old_fs; | |
3088 | int err; | |
3089 | ||
3090 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3091 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3092 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3093 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3094 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3095 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3096 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3097 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3098 | if (err) |
3099 | return -EFAULT; | |
3100 | ||
3101 | old_fs = get_fs(); | |
c6d409cf | 3102 | set_fs(KERNEL_DS); |
c3f52ae6 | 3103 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3104 | set_fs(old_fs); |
a2116ed2 AB |
3105 | |
3106 | if (cmd == SIOCGIFMAP && !err) { | |
3107 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3108 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3109 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3110 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3111 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3112 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3113 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3114 | if (err) |
3115 | err = -EFAULT; | |
3116 | } | |
3117 | return err; | |
3118 | } | |
3119 | ||
7a229387 | 3120 | struct rtentry32 { |
c6d409cf | 3121 | u32 rt_pad1; |
7a229387 AB |
3122 | struct sockaddr rt_dst; /* target address */ |
3123 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3124 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3125 | unsigned short rt_flags; |
3126 | short rt_pad2; | |
3127 | u32 rt_pad3; | |
3128 | unsigned char rt_tos; | |
3129 | unsigned char rt_class; | |
3130 | short rt_pad4; | |
3131 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3132 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3133 | u32 rt_mtu; /* per route MTU/Window */ |
3134 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3135 | unsigned short rt_irtt; /* Initial RTT */ |
3136 | }; | |
3137 | ||
3138 | struct in6_rtmsg32 { | |
3139 | struct in6_addr rtmsg_dst; | |
3140 | struct in6_addr rtmsg_src; | |
3141 | struct in6_addr rtmsg_gateway; | |
3142 | u32 rtmsg_type; | |
3143 | u16 rtmsg_dst_len; | |
3144 | u16 rtmsg_src_len; | |
3145 | u32 rtmsg_metric; | |
3146 | u32 rtmsg_info; | |
3147 | u32 rtmsg_flags; | |
3148 | s32 rtmsg_ifindex; | |
3149 | }; | |
3150 | ||
6b96018b AB |
3151 | static int routing_ioctl(struct net *net, struct socket *sock, |
3152 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3153 | { |
3154 | int ret; | |
3155 | void *r = NULL; | |
3156 | struct in6_rtmsg r6; | |
3157 | struct rtentry r4; | |
3158 | char devname[16]; | |
3159 | u32 rtdev; | |
3160 | mm_segment_t old_fs = get_fs(); | |
3161 | ||
6b96018b AB |
3162 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3163 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3164 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3165 | 3 * sizeof(struct in6_addr)); |
3ddc5b46 MD |
3166 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3167 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3168 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3169 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3170 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3171 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3172 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3173 | |
3174 | r = (void *) &r6; | |
3175 | } else { /* ipv4 */ | |
6b96018b | 3176 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3177 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3178 | 3 * sizeof(struct sockaddr)); |
3ddc5b46 MD |
3179 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
3180 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3181 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3182 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); | |
3183 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3184 | ret |= get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3185 | if (rtdev) { |
c6d409cf | 3186 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3187 | r4.rt_dev = (char __user __force *)devname; |
3188 | devname[15] = 0; | |
7a229387 AB |
3189 | } else |
3190 | r4.rt_dev = NULL; | |
3191 | ||
3192 | r = (void *) &r4; | |
3193 | } | |
3194 | ||
3195 | if (ret) { | |
3196 | ret = -EFAULT; | |
3197 | goto out; | |
3198 | } | |
3199 | ||
c6d409cf | 3200 | set_fs(KERNEL_DS); |
6b96018b | 3201 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3202 | set_fs(old_fs); |
7a229387 AB |
3203 | |
3204 | out: | |
7a229387 AB |
3205 | return ret; |
3206 | } | |
3207 | ||
3208 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3209 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3210 | * use compatible ioctls |
7a229387 | 3211 | */ |
6b96018b | 3212 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3213 | { |
6b96018b | 3214 | compat_ulong_t tmp; |
7a229387 | 3215 | |
6b96018b | 3216 | if (get_user(tmp, argp)) |
7a229387 AB |
3217 | return -EFAULT; |
3218 | if (tmp == BRCTL_GET_VERSION) | |
3219 | return BRCTL_VERSION + 1; | |
3220 | return -EINVAL; | |
3221 | } | |
3222 | ||
6b96018b AB |
3223 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3224 | unsigned int cmd, unsigned long arg) | |
3225 | { | |
3226 | void __user *argp = compat_ptr(arg); | |
3227 | struct sock *sk = sock->sk; | |
3228 | struct net *net = sock_net(sk); | |
7a229387 | 3229 | |
6b96018b | 3230 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693 | 3231 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3232 | |
3233 | switch (cmd) { | |
3234 | case SIOCSIFBR: | |
3235 | case SIOCGIFBR: | |
3236 | return old_bridge_ioctl(argp); | |
3237 | case SIOCGIFNAME: | |
3238 | return dev_ifname32(net, argp); | |
3239 | case SIOCGIFCONF: | |
3240 | return dev_ifconf(net, argp); | |
3241 | case SIOCETHTOOL: | |
3242 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3243 | case SIOCWANDEV: |
3244 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3245 | case SIOCGIFMAP: |
3246 | case SIOCSIFMAP: | |
3247 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3248 | case SIOCBONDENSLAVE: |
3249 | case SIOCBONDRELEASE: | |
3250 | case SIOCBONDSETHWADDR: | |
6b96018b AB |
3251 | case SIOCBONDCHANGEACTIVE: |
3252 | return bond_ioctl(net, cmd, argp); | |
3253 | case SIOCADDRT: | |
3254 | case SIOCDELRT: | |
3255 | return routing_ioctl(net, sock, cmd, argp); | |
3256 | case SIOCGSTAMP: | |
3257 | return do_siocgstamp(net, sock, cmd, argp); | |
3258 | case SIOCGSTAMPNS: | |
3259 | return do_siocgstampns(net, sock, cmd, argp); | |
590d4693 BH |
3260 | case SIOCBONDSLAVEINFOQUERY: |
3261 | case SIOCBONDINFOQUERY: | |
a2116ed2 | 3262 | case SIOCSHWTSTAMP: |
fd468c74 | 3263 | case SIOCGHWTSTAMP: |
590d4693 | 3264 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3265 | |
3266 | case FIOSETOWN: | |
3267 | case SIOCSPGRP: | |
3268 | case FIOGETOWN: | |
3269 | case SIOCGPGRP: | |
3270 | case SIOCBRADDBR: | |
3271 | case SIOCBRDELBR: | |
3272 | case SIOCGIFVLAN: | |
3273 | case SIOCSIFVLAN: | |
3274 | case SIOCADDDLCI: | |
3275 | case SIOCDELDLCI: | |
3276 | return sock_ioctl(file, cmd, arg); | |
3277 | ||
3278 | case SIOCGIFFLAGS: | |
3279 | case SIOCSIFFLAGS: | |
3280 | case SIOCGIFMETRIC: | |
3281 | case SIOCSIFMETRIC: | |
3282 | case SIOCGIFMTU: | |
3283 | case SIOCSIFMTU: | |
3284 | case SIOCGIFMEM: | |
3285 | case SIOCSIFMEM: | |
3286 | case SIOCGIFHWADDR: | |
3287 | case SIOCSIFHWADDR: | |
3288 | case SIOCADDMULTI: | |
3289 | case SIOCDELMULTI: | |
3290 | case SIOCGIFINDEX: | |
6b96018b AB |
3291 | case SIOCGIFADDR: |
3292 | case SIOCSIFADDR: | |
3293 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3294 | case SIOCDIFADDR: |
6b96018b AB |
3295 | case SIOCGIFBRDADDR: |
3296 | case SIOCSIFBRDADDR: | |
3297 | case SIOCGIFDSTADDR: | |
3298 | case SIOCSIFDSTADDR: | |
3299 | case SIOCGIFNETMASK: | |
3300 | case SIOCSIFNETMASK: | |
3301 | case SIOCSIFPFLAGS: | |
3302 | case SIOCGIFPFLAGS: | |
3303 | case SIOCGIFTXQLEN: | |
3304 | case SIOCSIFTXQLEN: | |
3305 | case SIOCBRADDIF: | |
3306 | case SIOCBRDELIF: | |
9177efd3 AB |
3307 | case SIOCSIFNAME: |
3308 | case SIOCGMIIPHY: | |
3309 | case SIOCGMIIREG: | |
3310 | case SIOCSMIIREG: | |
6b96018b | 3311 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3312 | |
6b96018b AB |
3313 | case SIOCSARP: |
3314 | case SIOCGARP: | |
3315 | case SIOCDARP: | |
6b96018b | 3316 | case SIOCATMARK: |
9177efd3 AB |
3317 | return sock_do_ioctl(net, sock, cmd, arg); |
3318 | } | |
3319 | ||
6b96018b AB |
3320 | return -ENOIOCTLCMD; |
3321 | } | |
7a229387 | 3322 | |
95c96174 | 3323 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3324 | unsigned long arg) |
89bbfc95 SP |
3325 | { |
3326 | struct socket *sock = file->private_data; | |
3327 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3328 | struct sock *sk; |
3329 | struct net *net; | |
3330 | ||
3331 | sk = sock->sk; | |
3332 | net = sock_net(sk); | |
89bbfc95 SP |
3333 | |
3334 | if (sock->ops->compat_ioctl) | |
3335 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3336 | ||
87de87d5 DM |
3337 | if (ret == -ENOIOCTLCMD && |
3338 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3339 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3340 | ||
6b96018b AB |
3341 | if (ret == -ENOIOCTLCMD) |
3342 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3343 | ||
89bbfc95 SP |
3344 | return ret; |
3345 | } | |
3346 | #endif | |
3347 | ||
ac5a488e SS |
3348 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3349 | { | |
3350 | return sock->ops->bind(sock, addr, addrlen); | |
3351 | } | |
c6d409cf | 3352 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3353 | |
3354 | int kernel_listen(struct socket *sock, int backlog) | |
3355 | { | |
3356 | return sock->ops->listen(sock, backlog); | |
3357 | } | |
c6d409cf | 3358 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3359 | |
3360 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3361 | { | |
3362 | struct sock *sk = sock->sk; | |
3363 | int err; | |
3364 | ||
3365 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3366 | newsock); | |
3367 | if (err < 0) | |
3368 | goto done; | |
3369 | ||
3370 | err = sock->ops->accept(sock, *newsock, flags); | |
3371 | if (err < 0) { | |
3372 | sock_release(*newsock); | |
fa8705b0 | 3373 | *newsock = NULL; |
ac5a488e SS |
3374 | goto done; |
3375 | } | |
3376 | ||
3377 | (*newsock)->ops = sock->ops; | |
1b08534e | 3378 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3379 | |
3380 | done: | |
3381 | return err; | |
3382 | } | |
c6d409cf | 3383 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3384 | |
3385 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3386 | int flags) |
ac5a488e SS |
3387 | { |
3388 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3389 | } | |
c6d409cf | 3390 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3391 | |
3392 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3393 | int *addrlen) | |
3394 | { | |
3395 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3396 | } | |
c6d409cf | 3397 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3398 | |
3399 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3400 | int *addrlen) | |
3401 | { | |
3402 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3403 | } | |
c6d409cf | 3404 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3405 | |
3406 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3407 | char *optval, int *optlen) | |
3408 | { | |
3409 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3410 | char __user *uoptval; |
3411 | int __user *uoptlen; | |
ac5a488e SS |
3412 | int err; |
3413 | ||
fb8621bb NK |
3414 | uoptval = (char __user __force *) optval; |
3415 | uoptlen = (int __user __force *) optlen; | |
3416 | ||
ac5a488e SS |
3417 | set_fs(KERNEL_DS); |
3418 | if (level == SOL_SOCKET) | |
fb8621bb | 3419 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3420 | else |
fb8621bb NK |
3421 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3422 | uoptlen); | |
ac5a488e SS |
3423 | set_fs(oldfs); |
3424 | return err; | |
3425 | } | |
c6d409cf | 3426 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3427 | |
3428 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3429 | char *optval, unsigned int optlen) |
ac5a488e SS |
3430 | { |
3431 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3432 | char __user *uoptval; |
ac5a488e SS |
3433 | int err; |
3434 | ||
fb8621bb NK |
3435 | uoptval = (char __user __force *) optval; |
3436 | ||
ac5a488e SS |
3437 | set_fs(KERNEL_DS); |
3438 | if (level == SOL_SOCKET) | |
fb8621bb | 3439 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3440 | else |
fb8621bb | 3441 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3442 | optlen); |
3443 | set_fs(oldfs); | |
3444 | return err; | |
3445 | } | |
c6d409cf | 3446 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3447 | |
3448 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3449 | size_t size, int flags) | |
3450 | { | |
3451 | if (sock->ops->sendpage) | |
3452 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3453 | ||
3454 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3455 | } | |
c6d409cf | 3456 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3457 | |
3458 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3459 | { | |
3460 | mm_segment_t oldfs = get_fs(); | |
3461 | int err; | |
3462 | ||
3463 | set_fs(KERNEL_DS); | |
3464 | err = sock->ops->ioctl(sock, cmd, arg); | |
3465 | set_fs(oldfs); | |
3466 | ||
3467 | return err; | |
3468 | } | |
c6d409cf | 3469 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3470 | |
91cf45f0 TM |
3471 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3472 | { | |
3473 | return sock->ops->shutdown(sock, how); | |
3474 | } | |
91cf45f0 | 3475 | EXPORT_SYMBOL(kernel_sock_shutdown); |