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Commit | Line | Data |
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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 | |
bf84a010 | 613 | void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 614 | { |
2244d07b | 615 | *tx_flags = 0; |
b9f40e21 | 616 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
2244d07b | 617 | *tx_flags |= SKBTX_HW_TSTAMP; |
b9f40e21 | 618 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
2244d07b | 619 | *tx_flags |= SKBTX_SW_TSTAMP; |
e7fd2885 WB |
620 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED) |
621 | *tx_flags |= SKBTX_SCHED_TSTAMP; | |
e1c8a607 WB |
622 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK) |
623 | *tx_flags |= SKBTX_ACK_TSTAMP; | |
e7fd2885 | 624 | |
6e3e939f JB |
625 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
626 | *tx_flags |= SKBTX_WIFI_STATUS; | |
20d49473 PO |
627 | } |
628 | EXPORT_SYMBOL(sock_tx_timestamp); | |
629 | ||
228e548e AB |
630 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
631 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
632 | { |
633 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 LT |
634 | |
635 | si->sock = sock; | |
636 | si->scm = NULL; | |
637 | si->msg = msg; | |
638 | si->size = size; | |
639 | ||
1da177e4 LT |
640 | return sock->ops->sendmsg(iocb, sock, msg, size); |
641 | } | |
642 | ||
228e548e AB |
643 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
644 | struct msghdr *msg, size_t size) | |
645 | { | |
646 | int err = security_socket_sendmsg(sock, msg, size); | |
647 | ||
648 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
649 | } | |
650 | ||
1da177e4 LT |
651 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
652 | { | |
653 | struct kiocb iocb; | |
654 | struct sock_iocb siocb; | |
655 | int ret; | |
656 | ||
657 | init_sync_kiocb(&iocb, NULL); | |
658 | iocb.private = &siocb; | |
659 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
660 | if (-EIOCBQUEUED == ret) | |
661 | ret = wait_on_sync_kiocb(&iocb); | |
662 | return ret; | |
663 | } | |
c6d409cf | 664 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 665 | |
894dc24c | 666 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
667 | { |
668 | struct kiocb iocb; | |
669 | struct sock_iocb siocb; | |
670 | int ret; | |
671 | ||
672 | init_sync_kiocb(&iocb, NULL); | |
673 | iocb.private = &siocb; | |
674 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
675 | if (-EIOCBQUEUED == ret) | |
676 | ret = wait_on_sync_kiocb(&iocb); | |
677 | return ret; | |
678 | } | |
679 | ||
1da177e4 LT |
680 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
681 | struct kvec *vec, size_t num, size_t size) | |
682 | { | |
683 | mm_segment_t oldfs = get_fs(); | |
684 | int result; | |
685 | ||
686 | set_fs(KERNEL_DS); | |
687 | /* | |
688 | * the following is safe, since for compiler definitions of kvec and | |
689 | * iovec are identical, yielding the same in-core layout and alignment | |
690 | */ | |
89bddce5 | 691 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
692 | msg->msg_iovlen = num; |
693 | result = sock_sendmsg(sock, msg, size); | |
694 | set_fs(oldfs); | |
695 | return result; | |
696 | } | |
c6d409cf | 697 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 698 | |
92f37fd2 ED |
699 | /* |
700 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
701 | */ | |
702 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
703 | struct sk_buff *skb) | |
704 | { | |
20d49473 | 705 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
f24b9be5 | 706 | struct scm_timestamping tss; |
20d49473 PO |
707 | int empty = 1; |
708 | struct skb_shared_hwtstamps *shhwtstamps = | |
709 | skb_hwtstamps(skb); | |
710 | ||
711 | /* Race occurred between timestamp enabling and packet | |
712 | receiving. Fill in the current time for now. */ | |
713 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
714 | __net_timestamp(skb); | |
715 | ||
716 | if (need_software_tstamp) { | |
717 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
718 | struct timeval tv; | |
719 | skb_get_timestamp(skb, &tv); | |
720 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
721 | sizeof(tv), &tv); | |
722 | } else { | |
f24b9be5 WB |
723 | struct timespec ts; |
724 | skb_get_timestampns(skb, &ts); | |
20d49473 | 725 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
f24b9be5 | 726 | sizeof(ts), &ts); |
20d49473 PO |
727 | } |
728 | } | |
729 | ||
f24b9be5 | 730 | memset(&tss, 0, sizeof(tss)); |
b9f40e21 | 731 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE || |
f24b9be5 WB |
732 | skb_shinfo(skb)->tx_flags & SKBTX_ANY_SW_TSTAMP) && |
733 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) | |
20d49473 | 734 | empty = 0; |
4d276eb6 | 735 | if (shhwtstamps && |
b9f40e21 | 736 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
f24b9be5 | 737 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) |
4d276eb6 | 738 | empty = 0; |
20d49473 PO |
739 | if (!empty) |
740 | put_cmsg(msg, SOL_SOCKET, | |
f24b9be5 | 741 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
92f37fd2 | 742 | } |
7c81fd8b ACM |
743 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
744 | ||
6e3e939f JB |
745 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
746 | struct sk_buff *skb) | |
747 | { | |
748 | int ack; | |
749 | ||
750 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
751 | return; | |
752 | if (!skb->wifi_acked_valid) | |
753 | return; | |
754 | ||
755 | ack = skb->wifi_acked; | |
756 | ||
757 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
758 | } | |
759 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
760 | ||
11165f14 | 761 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
762 | struct sk_buff *skb) | |
3b885787 NH |
763 | { |
764 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
765 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
766 | sizeof(__u32), &skb->dropcount); | |
767 | } | |
768 | ||
767dd033 | 769 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
770 | struct sk_buff *skb) |
771 | { | |
772 | sock_recv_timestamp(msg, sk, skb); | |
773 | sock_recv_drops(msg, sk, skb); | |
774 | } | |
767dd033 | 775 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 776 | |
a2e27255 ACM |
777 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
778 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 779 | { |
1da177e4 LT |
780 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
781 | ||
782 | si->sock = sock; | |
783 | si->scm = NULL; | |
784 | si->msg = msg; | |
785 | si->size = size; | |
786 | si->flags = flags; | |
787 | ||
1da177e4 LT |
788 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
789 | } | |
790 | ||
a2e27255 ACM |
791 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
792 | struct msghdr *msg, size_t size, int flags) | |
793 | { | |
794 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
795 | ||
796 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
797 | } | |
798 | ||
89bddce5 | 799 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
800 | size_t size, int flags) |
801 | { | |
802 | struct kiocb iocb; | |
803 | struct sock_iocb siocb; | |
804 | int ret; | |
805 | ||
89bddce5 | 806 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
807 | iocb.private = &siocb; |
808 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
809 | if (-EIOCBQUEUED == ret) | |
810 | ret = wait_on_sync_kiocb(&iocb); | |
811 | return ret; | |
812 | } | |
c6d409cf | 813 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 814 | |
a2e27255 ACM |
815 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
816 | size_t size, int flags) | |
817 | { | |
818 | struct kiocb iocb; | |
819 | struct sock_iocb siocb; | |
820 | int ret; | |
821 | ||
822 | init_sync_kiocb(&iocb, NULL); | |
823 | iocb.private = &siocb; | |
824 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
825 | if (-EIOCBQUEUED == ret) | |
826 | ret = wait_on_sync_kiocb(&iocb); | |
827 | return ret; | |
828 | } | |
829 | ||
c1249c0a ML |
830 | /** |
831 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
832 | * @sock: The socket to receive the message from | |
833 | * @msg: Received message | |
834 | * @vec: Input s/g array for message data | |
835 | * @num: Size of input s/g array | |
836 | * @size: Number of bytes to read | |
837 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
838 | * | |
839 | * On return the msg structure contains the scatter/gather array passed in the | |
840 | * vec argument. The array is modified so that it consists of the unfilled | |
841 | * portion of the original array. | |
842 | * | |
843 | * The returned value is the total number of bytes received, or an error. | |
844 | */ | |
89bddce5 SH |
845 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
846 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
847 | { |
848 | mm_segment_t oldfs = get_fs(); | |
849 | int result; | |
850 | ||
851 | set_fs(KERNEL_DS); | |
852 | /* | |
853 | * the following is safe, since for compiler definitions of kvec and | |
854 | * iovec are identical, yielding the same in-core layout and alignment | |
855 | */ | |
89bddce5 | 856 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
857 | result = sock_recvmsg(sock, msg, size, flags); |
858 | set_fs(oldfs); | |
859 | return result; | |
860 | } | |
c6d409cf | 861 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 | 862 | |
ce1d4d3e CH |
863 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
864 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 865 | { |
1da177e4 LT |
866 | struct socket *sock; |
867 | int flags; | |
868 | ||
ce1d4d3e CH |
869 | sock = file->private_data; |
870 | ||
35f9c09f ED |
871 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
872 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
873 | flags |= more; | |
ce1d4d3e | 874 | |
e6949583 | 875 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 876 | } |
1da177e4 | 877 | |
9c55e01c | 878 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 879 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
880 | unsigned int flags) |
881 | { | |
882 | struct socket *sock = file->private_data; | |
883 | ||
997b37da RDC |
884 | if (unlikely(!sock->ops->splice_read)) |
885 | return -EINVAL; | |
886 | ||
9c55e01c JA |
887 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
888 | } | |
889 | ||
ce1d4d3e | 890 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 891 | struct sock_iocb *siocb) |
ce1d4d3e | 892 | { |
d29c445b KO |
893 | if (!is_sync_kiocb(iocb)) |
894 | BUG(); | |
1da177e4 | 895 | |
ce1d4d3e | 896 | siocb->kiocb = iocb; |
ce1d4d3e CH |
897 | iocb->private = siocb; |
898 | return siocb; | |
1da177e4 LT |
899 | } |
900 | ||
ce1d4d3e | 901 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
902 | struct file *file, const struct iovec *iov, |
903 | unsigned long nr_segs) | |
ce1d4d3e CH |
904 | { |
905 | struct socket *sock = file->private_data; | |
906 | size_t size = 0; | |
907 | int i; | |
1da177e4 | 908 | |
89bddce5 SH |
909 | for (i = 0; i < nr_segs; i++) |
910 | size += iov[i].iov_len; | |
1da177e4 | 911 | |
ce1d4d3e CH |
912 | msg->msg_name = NULL; |
913 | msg->msg_namelen = 0; | |
914 | msg->msg_control = NULL; | |
915 | msg->msg_controllen = 0; | |
89bddce5 | 916 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
917 | msg->msg_iovlen = nr_segs; |
918 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
919 | ||
920 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
921 | } | |
922 | ||
027445c3 BP |
923 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
924 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
925 | { |
926 | struct sock_iocb siocb, *x; | |
927 | ||
1da177e4 LT |
928 | if (pos != 0) |
929 | return -ESPIPE; | |
027445c3 | 930 | |
73a7075e | 931 | if (iocb->ki_nbytes == 0) /* Match SYS5 behaviour */ |
1da177e4 LT |
932 | return 0; |
933 | ||
027445c3 BP |
934 | |
935 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
936 | if (!x) |
937 | return -ENOMEM; | |
027445c3 | 938 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
939 | } |
940 | ||
ce1d4d3e | 941 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
942 | struct file *file, const struct iovec *iov, |
943 | unsigned long nr_segs) | |
1da177e4 | 944 | { |
ce1d4d3e CH |
945 | struct socket *sock = file->private_data; |
946 | size_t size = 0; | |
947 | int i; | |
1da177e4 | 948 | |
89bddce5 SH |
949 | for (i = 0; i < nr_segs; i++) |
950 | size += iov[i].iov_len; | |
1da177e4 | 951 | |
ce1d4d3e CH |
952 | msg->msg_name = NULL; |
953 | msg->msg_namelen = 0; | |
954 | msg->msg_control = NULL; | |
955 | msg->msg_controllen = 0; | |
89bddce5 | 956 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
957 | msg->msg_iovlen = nr_segs; |
958 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
959 | if (sock->type == SOCK_SEQPACKET) | |
960 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 961 | |
ce1d4d3e | 962 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
963 | } |
964 | ||
027445c3 BP |
965 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
966 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
967 | { |
968 | struct sock_iocb siocb, *x; | |
1da177e4 | 969 | |
ce1d4d3e CH |
970 | if (pos != 0) |
971 | return -ESPIPE; | |
027445c3 | 972 | |
027445c3 | 973 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
974 | if (!x) |
975 | return -ENOMEM; | |
1da177e4 | 976 | |
027445c3 | 977 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
978 | } |
979 | ||
1da177e4 LT |
980 | /* |
981 | * Atomic setting of ioctl hooks to avoid race | |
982 | * with module unload. | |
983 | */ | |
984 | ||
4a3e2f71 | 985 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 986 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 987 | |
881d966b | 988 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 989 | { |
4a3e2f71 | 990 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 991 | br_ioctl_hook = hook; |
4a3e2f71 | 992 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
993 | } |
994 | EXPORT_SYMBOL(brioctl_set); | |
995 | ||
4a3e2f71 | 996 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 997 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 998 | |
881d966b | 999 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 1000 | { |
4a3e2f71 | 1001 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1002 | vlan_ioctl_hook = hook; |
4a3e2f71 | 1003 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
1004 | } |
1005 | EXPORT_SYMBOL(vlan_ioctl_set); | |
1006 | ||
4a3e2f71 | 1007 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 1008 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 1009 | |
89bddce5 | 1010 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 1011 | { |
4a3e2f71 | 1012 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 1013 | dlci_ioctl_hook = hook; |
4a3e2f71 | 1014 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1015 | } |
1016 | EXPORT_SYMBOL(dlci_ioctl_set); | |
1017 | ||
6b96018b AB |
1018 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
1019 | unsigned int cmd, unsigned long arg) | |
1020 | { | |
1021 | int err; | |
1022 | void __user *argp = (void __user *)arg; | |
1023 | ||
1024 | err = sock->ops->ioctl(sock, cmd, arg); | |
1025 | ||
1026 | /* | |
1027 | * If this ioctl is unknown try to hand it down | |
1028 | * to the NIC driver. | |
1029 | */ | |
1030 | if (err == -ENOIOCTLCMD) | |
1031 | err = dev_ioctl(net, cmd, argp); | |
1032 | ||
1033 | return err; | |
1034 | } | |
1035 | ||
1da177e4 LT |
1036 | /* |
1037 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1038 | * what to do with it - that's up to the protocol still. | |
1039 | */ | |
1040 | ||
1041 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1042 | { | |
1043 | struct socket *sock; | |
881d966b | 1044 | struct sock *sk; |
1da177e4 LT |
1045 | void __user *argp = (void __user *)arg; |
1046 | int pid, err; | |
881d966b | 1047 | struct net *net; |
1da177e4 | 1048 | |
b69aee04 | 1049 | sock = file->private_data; |
881d966b | 1050 | sk = sock->sk; |
3b1e0a65 | 1051 | net = sock_net(sk); |
1da177e4 | 1052 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1053 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1054 | } else |
3d23e349 | 1055 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1056 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1057 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1058 | } else |
3d23e349 | 1059 | #endif |
89bddce5 | 1060 | switch (cmd) { |
1da177e4 LT |
1061 | case FIOSETOWN: |
1062 | case SIOCSPGRP: | |
1063 | err = -EFAULT; | |
1064 | if (get_user(pid, (int __user *)argp)) | |
1065 | break; | |
1066 | err = f_setown(sock->file, pid, 1); | |
1067 | break; | |
1068 | case FIOGETOWN: | |
1069 | case SIOCGPGRP: | |
609d7fa9 | 1070 | err = put_user(f_getown(sock->file), |
89bddce5 | 1071 | (int __user *)argp); |
1da177e4 LT |
1072 | break; |
1073 | case SIOCGIFBR: | |
1074 | case SIOCSIFBR: | |
1075 | case SIOCBRADDBR: | |
1076 | case SIOCBRDELBR: | |
1077 | err = -ENOPKG; | |
1078 | if (!br_ioctl_hook) | |
1079 | request_module("bridge"); | |
1080 | ||
4a3e2f71 | 1081 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1082 | if (br_ioctl_hook) |
881d966b | 1083 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1084 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1085 | break; |
1086 | case SIOCGIFVLAN: | |
1087 | case SIOCSIFVLAN: | |
1088 | err = -ENOPKG; | |
1089 | if (!vlan_ioctl_hook) | |
1090 | request_module("8021q"); | |
1091 | ||
4a3e2f71 | 1092 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1093 | if (vlan_ioctl_hook) |
881d966b | 1094 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1095 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1096 | break; |
1da177e4 LT |
1097 | case SIOCADDDLCI: |
1098 | case SIOCDELDLCI: | |
1099 | err = -ENOPKG; | |
1100 | if (!dlci_ioctl_hook) | |
1101 | request_module("dlci"); | |
1102 | ||
7512cbf6 PE |
1103 | mutex_lock(&dlci_ioctl_mutex); |
1104 | if (dlci_ioctl_hook) | |
1da177e4 | 1105 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1106 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1107 | break; |
1108 | default: | |
6b96018b | 1109 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1110 | break; |
89bddce5 | 1111 | } |
1da177e4 LT |
1112 | return err; |
1113 | } | |
1114 | ||
1115 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1116 | { | |
1117 | int err; | |
1118 | struct socket *sock = NULL; | |
89bddce5 | 1119 | |
1da177e4 LT |
1120 | err = security_socket_create(family, type, protocol, 1); |
1121 | if (err) | |
1122 | goto out; | |
1123 | ||
1124 | sock = sock_alloc(); | |
1125 | if (!sock) { | |
1126 | err = -ENOMEM; | |
1127 | goto out; | |
1128 | } | |
1129 | ||
1da177e4 | 1130 | sock->type = type; |
7420ed23 VY |
1131 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1132 | if (err) | |
1133 | goto out_release; | |
1134 | ||
1da177e4 LT |
1135 | out: |
1136 | *res = sock; | |
1137 | return err; | |
7420ed23 VY |
1138 | out_release: |
1139 | sock_release(sock); | |
1140 | sock = NULL; | |
1141 | goto out; | |
1da177e4 | 1142 | } |
c6d409cf | 1143 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1144 | |
1145 | /* No kernel lock held - perfect */ | |
89bddce5 | 1146 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 | 1147 | { |
cbf55001 | 1148 | unsigned int busy_flag = 0; |
1da177e4 LT |
1149 | struct socket *sock; |
1150 | ||
1151 | /* | |
89bddce5 | 1152 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1153 | */ |
b69aee04 | 1154 | sock = file->private_data; |
2d48d67f | 1155 | |
cbf55001 | 1156 | if (sk_can_busy_loop(sock->sk)) { |
2d48d67f | 1157 | /* this socket can poll_ll so tell the system call */ |
cbf55001 | 1158 | busy_flag = POLL_BUSY_LOOP; |
2d48d67f ET |
1159 | |
1160 | /* once, only if requested by syscall */ | |
cbf55001 ET |
1161 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
1162 | sk_busy_loop(sock->sk, 1); | |
2d48d67f ET |
1163 | } |
1164 | ||
cbf55001 | 1165 | return busy_flag | sock->ops->poll(file, sock, wait); |
1da177e4 LT |
1166 | } |
1167 | ||
89bddce5 | 1168 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1169 | { |
b69aee04 | 1170 | struct socket *sock = file->private_data; |
1da177e4 LT |
1171 | |
1172 | return sock->ops->mmap(file, sock, vma); | |
1173 | } | |
1174 | ||
20380731 | 1175 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1176 | { |
1da177e4 LT |
1177 | sock_release(SOCKET_I(inode)); |
1178 | return 0; | |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | * Update the socket async list | |
1183 | * | |
1184 | * Fasync_list locking strategy. | |
1185 | * | |
1186 | * 1. fasync_list is modified only under process context socket lock | |
1187 | * i.e. under semaphore. | |
1188 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1189 | * or under socket lock |
1da177e4 LT |
1190 | */ |
1191 | ||
1192 | static int sock_fasync(int fd, struct file *filp, int on) | |
1193 | { | |
989a2979 ED |
1194 | struct socket *sock = filp->private_data; |
1195 | struct sock *sk = sock->sk; | |
eaefd110 | 1196 | struct socket_wq *wq; |
1da177e4 | 1197 | |
989a2979 | 1198 | if (sk == NULL) |
1da177e4 | 1199 | return -EINVAL; |
1da177e4 LT |
1200 | |
1201 | lock_sock(sk); | |
eaefd110 ED |
1202 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1203 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1204 | |
eaefd110 | 1205 | if (!wq->fasync_list) |
989a2979 ED |
1206 | sock_reset_flag(sk, SOCK_FASYNC); |
1207 | else | |
bcdce719 | 1208 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1209 | |
989a2979 | 1210 | release_sock(sk); |
1da177e4 LT |
1211 | return 0; |
1212 | } | |
1213 | ||
43815482 | 1214 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1215 | |
1216 | int sock_wake_async(struct socket *sock, int how, int band) | |
1217 | { | |
43815482 ED |
1218 | struct socket_wq *wq; |
1219 | ||
1220 | if (!sock) | |
1221 | return -1; | |
1222 | rcu_read_lock(); | |
1223 | wq = rcu_dereference(sock->wq); | |
1224 | if (!wq || !wq->fasync_list) { | |
1225 | rcu_read_unlock(); | |
1da177e4 | 1226 | return -1; |
43815482 | 1227 | } |
89bddce5 | 1228 | switch (how) { |
8d8ad9d7 | 1229 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1230 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1231 | break; | |
1232 | goto call_kill; | |
8d8ad9d7 | 1233 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1234 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1235 | break; | |
1236 | /* fall through */ | |
8d8ad9d7 | 1237 | case SOCK_WAKE_IO: |
89bddce5 | 1238 | call_kill: |
43815482 | 1239 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1240 | break; |
8d8ad9d7 | 1241 | case SOCK_WAKE_URG: |
43815482 | 1242 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1243 | } |
43815482 | 1244 | rcu_read_unlock(); |
1da177e4 LT |
1245 | return 0; |
1246 | } | |
c6d409cf | 1247 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1248 | |
721db93a | 1249 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1250 | struct socket **res, int kern) |
1da177e4 LT |
1251 | { |
1252 | int err; | |
1253 | struct socket *sock; | |
55737fda | 1254 | const struct net_proto_family *pf; |
1da177e4 LT |
1255 | |
1256 | /* | |
89bddce5 | 1257 | * Check protocol is in range |
1da177e4 LT |
1258 | */ |
1259 | if (family < 0 || family >= NPROTO) | |
1260 | return -EAFNOSUPPORT; | |
1261 | if (type < 0 || type >= SOCK_MAX) | |
1262 | return -EINVAL; | |
1263 | ||
1264 | /* Compatibility. | |
1265 | ||
1266 | This uglymoron is moved from INET layer to here to avoid | |
1267 | deadlock in module load. | |
1268 | */ | |
1269 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1270 | static int warned; |
1da177e4 LT |
1271 | if (!warned) { |
1272 | warned = 1; | |
3410f22e YY |
1273 | pr_info("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1274 | current->comm); | |
1da177e4 LT |
1275 | } |
1276 | family = PF_PACKET; | |
1277 | } | |
1278 | ||
1279 | err = security_socket_create(family, type, protocol, kern); | |
1280 | if (err) | |
1281 | return err; | |
89bddce5 | 1282 | |
55737fda SH |
1283 | /* |
1284 | * Allocate the socket and allow the family to set things up. if | |
1285 | * the protocol is 0, the family is instructed to select an appropriate | |
1286 | * default. | |
1287 | */ | |
1288 | sock = sock_alloc(); | |
1289 | if (!sock) { | |
e87cc472 | 1290 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1291 | return -ENFILE; /* Not exactly a match, but its the |
1292 | closest posix thing */ | |
1293 | } | |
1294 | ||
1295 | sock->type = type; | |
1296 | ||
95a5afca | 1297 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1298 | /* Attempt to load a protocol module if the find failed. |
1299 | * | |
1300 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1301 | * requested real, full-featured networking support upon configuration. |
1302 | * Otherwise module support will break! | |
1303 | */ | |
190683a9 | 1304 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1305 | request_module("net-pf-%d", family); |
1da177e4 LT |
1306 | #endif |
1307 | ||
55737fda SH |
1308 | rcu_read_lock(); |
1309 | pf = rcu_dereference(net_families[family]); | |
1310 | err = -EAFNOSUPPORT; | |
1311 | if (!pf) | |
1312 | goto out_release; | |
1da177e4 LT |
1313 | |
1314 | /* | |
1315 | * We will call the ->create function, that possibly is in a loadable | |
1316 | * module, so we have to bump that loadable module refcnt first. | |
1317 | */ | |
55737fda | 1318 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1319 | goto out_release; |
1320 | ||
55737fda SH |
1321 | /* Now protected by module ref count */ |
1322 | rcu_read_unlock(); | |
1323 | ||
3f378b68 | 1324 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1325 | if (err < 0) |
1da177e4 | 1326 | goto out_module_put; |
a79af59e | 1327 | |
1da177e4 LT |
1328 | /* |
1329 | * Now to bump the refcnt of the [loadable] module that owns this | |
1330 | * socket at sock_release time we decrement its refcnt. | |
1331 | */ | |
55737fda SH |
1332 | if (!try_module_get(sock->ops->owner)) |
1333 | goto out_module_busy; | |
1334 | ||
1da177e4 LT |
1335 | /* |
1336 | * Now that we're done with the ->create function, the [loadable] | |
1337 | * module can have its refcnt decremented | |
1338 | */ | |
55737fda | 1339 | module_put(pf->owner); |
7420ed23 VY |
1340 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1341 | if (err) | |
3b185525 | 1342 | goto out_sock_release; |
55737fda | 1343 | *res = sock; |
1da177e4 | 1344 | |
55737fda SH |
1345 | return 0; |
1346 | ||
1347 | out_module_busy: | |
1348 | err = -EAFNOSUPPORT; | |
1da177e4 | 1349 | out_module_put: |
55737fda SH |
1350 | sock->ops = NULL; |
1351 | module_put(pf->owner); | |
1352 | out_sock_release: | |
1da177e4 | 1353 | sock_release(sock); |
55737fda SH |
1354 | return err; |
1355 | ||
1356 | out_release: | |
1357 | rcu_read_unlock(); | |
1358 | goto out_sock_release; | |
1da177e4 | 1359 | } |
721db93a | 1360 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1361 | |
1362 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1363 | { | |
1b8d7ae4 | 1364 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1365 | } |
c6d409cf | 1366 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1367 | |
1368 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1369 | { | |
1b8d7ae4 | 1370 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1371 | } |
c6d409cf | 1372 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1373 | |
3e0fa65f | 1374 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1375 | { |
1376 | int retval; | |
1377 | struct socket *sock; | |
a677a039 UD |
1378 | int flags; |
1379 | ||
e38b36f3 UD |
1380 | /* Check the SOCK_* constants for consistency. */ |
1381 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1382 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1383 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1384 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1385 | ||
a677a039 | 1386 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1387 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1388 | return -EINVAL; |
1389 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1390 | |
aaca0bdc UD |
1391 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1392 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1393 | ||
1da177e4 LT |
1394 | retval = sock_create(family, type, protocol, &sock); |
1395 | if (retval < 0) | |
1396 | goto out; | |
1397 | ||
77d27200 | 1398 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1399 | if (retval < 0) |
1400 | goto out_release; | |
1401 | ||
1402 | out: | |
1403 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1404 | return retval; | |
1405 | ||
1406 | out_release: | |
1407 | sock_release(sock); | |
1408 | return retval; | |
1409 | } | |
1410 | ||
1411 | /* | |
1412 | * Create a pair of connected sockets. | |
1413 | */ | |
1414 | ||
3e0fa65f HC |
1415 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1416 | int __user *, usockvec) | |
1da177e4 LT |
1417 | { |
1418 | struct socket *sock1, *sock2; | |
1419 | int fd1, fd2, err; | |
db349509 | 1420 | struct file *newfile1, *newfile2; |
a677a039 UD |
1421 | int flags; |
1422 | ||
1423 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1424 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1425 | return -EINVAL; |
1426 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1427 | |
aaca0bdc UD |
1428 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1429 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1430 | ||
1da177e4 LT |
1431 | /* |
1432 | * Obtain the first socket and check if the underlying protocol | |
1433 | * supports the socketpair call. | |
1434 | */ | |
1435 | ||
1436 | err = sock_create(family, type, protocol, &sock1); | |
1437 | if (err < 0) | |
1438 | goto out; | |
1439 | ||
1440 | err = sock_create(family, type, protocol, &sock2); | |
1441 | if (err < 0) | |
1442 | goto out_release_1; | |
1443 | ||
1444 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1445 | if (err < 0) |
1da177e4 LT |
1446 | goto out_release_both; |
1447 | ||
28407630 | 1448 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1449 | if (unlikely(fd1 < 0)) { |
1450 | err = fd1; | |
db349509 | 1451 | goto out_release_both; |
bf3c23d1 | 1452 | } |
d73aa286 | 1453 | |
28407630 | 1454 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1455 | if (unlikely(fd2 < 0)) { |
1456 | err = fd2; | |
d73aa286 | 1457 | goto out_put_unused_1; |
28407630 AV |
1458 | } |
1459 | ||
aab174f0 | 1460 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
28407630 AV |
1461 | if (unlikely(IS_ERR(newfile1))) { |
1462 | err = PTR_ERR(newfile1); | |
d73aa286 | 1463 | goto out_put_unused_both; |
28407630 AV |
1464 | } |
1465 | ||
aab174f0 | 1466 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1467 | if (IS_ERR(newfile2)) { |
1468 | err = PTR_ERR(newfile2); | |
d73aa286 | 1469 | goto out_fput_1; |
db349509 AV |
1470 | } |
1471 | ||
d73aa286 YD |
1472 | err = put_user(fd1, &usockvec[0]); |
1473 | if (err) | |
1474 | goto out_fput_both; | |
1475 | ||
1476 | err = put_user(fd2, &usockvec[1]); | |
1477 | if (err) | |
1478 | goto out_fput_both; | |
1479 | ||
157cf649 | 1480 | audit_fd_pair(fd1, fd2); |
d73aa286 | 1481 | |
db349509 AV |
1482 | fd_install(fd1, newfile1); |
1483 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1484 | /* fd1 and fd2 may be already another descriptors. |
1485 | * Not kernel problem. | |
1486 | */ | |
1487 | ||
d73aa286 | 1488 | return 0; |
1da177e4 | 1489 | |
d73aa286 YD |
1490 | out_fput_both: |
1491 | fput(newfile2); | |
1492 | fput(newfile1); | |
1493 | put_unused_fd(fd2); | |
1494 | put_unused_fd(fd1); | |
1495 | goto out; | |
1496 | ||
1497 | out_fput_1: | |
1498 | fput(newfile1); | |
1499 | put_unused_fd(fd2); | |
1500 | put_unused_fd(fd1); | |
1501 | sock_release(sock2); | |
1502 | goto out; | |
1da177e4 | 1503 | |
d73aa286 YD |
1504 | out_put_unused_both: |
1505 | put_unused_fd(fd2); | |
1506 | out_put_unused_1: | |
1507 | put_unused_fd(fd1); | |
1da177e4 | 1508 | out_release_both: |
89bddce5 | 1509 | sock_release(sock2); |
1da177e4 | 1510 | out_release_1: |
89bddce5 | 1511 | sock_release(sock1); |
1da177e4 LT |
1512 | out: |
1513 | return err; | |
1514 | } | |
1515 | ||
1da177e4 LT |
1516 | /* |
1517 | * Bind a name to a socket. Nothing much to do here since it's | |
1518 | * the protocol's responsibility to handle the local address. | |
1519 | * | |
1520 | * We move the socket address to kernel space before we call | |
1521 | * the protocol layer (having also checked the address is ok). | |
1522 | */ | |
1523 | ||
20f37034 | 1524 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1525 | { |
1526 | struct socket *sock; | |
230b1839 | 1527 | struct sockaddr_storage address; |
6cb153ca | 1528 | int err, fput_needed; |
1da177e4 | 1529 | |
89bddce5 | 1530 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1531 | if (sock) { |
43db362d | 1532 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1533 | if (err >= 0) { |
1534 | err = security_socket_bind(sock, | |
230b1839 | 1535 | (struct sockaddr *)&address, |
89bddce5 | 1536 | addrlen); |
6cb153ca BL |
1537 | if (!err) |
1538 | err = sock->ops->bind(sock, | |
89bddce5 | 1539 | (struct sockaddr *) |
230b1839 | 1540 | &address, addrlen); |
1da177e4 | 1541 | } |
6cb153ca | 1542 | fput_light(sock->file, fput_needed); |
89bddce5 | 1543 | } |
1da177e4 LT |
1544 | return err; |
1545 | } | |
1546 | ||
1da177e4 LT |
1547 | /* |
1548 | * Perform a listen. Basically, we allow the protocol to do anything | |
1549 | * necessary for a listen, and if that works, we mark the socket as | |
1550 | * ready for listening. | |
1551 | */ | |
1552 | ||
3e0fa65f | 1553 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1554 | { |
1555 | struct socket *sock; | |
6cb153ca | 1556 | int err, fput_needed; |
b8e1f9b5 | 1557 | int somaxconn; |
89bddce5 SH |
1558 | |
1559 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1560 | if (sock) { | |
8efa6e93 | 1561 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1562 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1563 | backlog = somaxconn; |
1da177e4 LT |
1564 | |
1565 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1566 | if (!err) |
1567 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1568 | |
6cb153ca | 1569 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1570 | } |
1571 | return err; | |
1572 | } | |
1573 | ||
1da177e4 LT |
1574 | /* |
1575 | * For accept, we attempt to create a new socket, set up the link | |
1576 | * with the client, wake up the client, then return the new | |
1577 | * connected fd. We collect the address of the connector in kernel | |
1578 | * space and move it to user at the very end. This is unclean because | |
1579 | * we open the socket then return an error. | |
1580 | * | |
1581 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1582 | * status to recvmsg. We need to add that support in a way thats | |
1583 | * clean when we restucture accept also. | |
1584 | */ | |
1585 | ||
20f37034 HC |
1586 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1587 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1588 | { |
1589 | struct socket *sock, *newsock; | |
39d8c1b6 | 1590 | struct file *newfile; |
6cb153ca | 1591 | int err, len, newfd, fput_needed; |
230b1839 | 1592 | struct sockaddr_storage address; |
1da177e4 | 1593 | |
77d27200 | 1594 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1595 | return -EINVAL; |
1596 | ||
1597 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1598 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1599 | ||
6cb153ca | 1600 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1601 | if (!sock) |
1602 | goto out; | |
1603 | ||
1604 | err = -ENFILE; | |
c6d409cf ED |
1605 | newsock = sock_alloc(); |
1606 | if (!newsock) | |
1da177e4 LT |
1607 | goto out_put; |
1608 | ||
1609 | newsock->type = sock->type; | |
1610 | newsock->ops = sock->ops; | |
1611 | ||
1da177e4 LT |
1612 | /* |
1613 | * We don't need try_module_get here, as the listening socket (sock) | |
1614 | * has the protocol module (sock->ops->owner) held. | |
1615 | */ | |
1616 | __module_get(newsock->ops->owner); | |
1617 | ||
28407630 | 1618 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1619 | if (unlikely(newfd < 0)) { |
1620 | err = newfd; | |
9a1875e6 DM |
1621 | sock_release(newsock); |
1622 | goto out_put; | |
39d8c1b6 | 1623 | } |
aab174f0 | 1624 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
28407630 AV |
1625 | if (unlikely(IS_ERR(newfile))) { |
1626 | err = PTR_ERR(newfile); | |
1627 | put_unused_fd(newfd); | |
1628 | sock_release(newsock); | |
1629 | goto out_put; | |
1630 | } | |
39d8c1b6 | 1631 | |
a79af59e FF |
1632 | err = security_socket_accept(sock, newsock); |
1633 | if (err) | |
39d8c1b6 | 1634 | goto out_fd; |
a79af59e | 1635 | |
1da177e4 LT |
1636 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1637 | if (err < 0) | |
39d8c1b6 | 1638 | goto out_fd; |
1da177e4 LT |
1639 | |
1640 | if (upeer_sockaddr) { | |
230b1839 | 1641 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1642 | &len, 2) < 0) { |
1da177e4 | 1643 | err = -ECONNABORTED; |
39d8c1b6 | 1644 | goto out_fd; |
1da177e4 | 1645 | } |
43db362d | 1646 | err = move_addr_to_user(&address, |
230b1839 | 1647 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1648 | if (err < 0) |
39d8c1b6 | 1649 | goto out_fd; |
1da177e4 LT |
1650 | } |
1651 | ||
1652 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1653 | ||
39d8c1b6 DM |
1654 | fd_install(newfd, newfile); |
1655 | err = newfd; | |
1da177e4 | 1656 | |
1da177e4 | 1657 | out_put: |
6cb153ca | 1658 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1659 | out: |
1660 | return err; | |
39d8c1b6 | 1661 | out_fd: |
9606a216 | 1662 | fput(newfile); |
39d8c1b6 | 1663 | put_unused_fd(newfd); |
1da177e4 LT |
1664 | goto out_put; |
1665 | } | |
1666 | ||
20f37034 HC |
1667 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1668 | int __user *, upeer_addrlen) | |
aaca0bdc | 1669 | { |
de11defe | 1670 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1671 | } |
1672 | ||
1da177e4 LT |
1673 | /* |
1674 | * Attempt to connect to a socket with the server address. The address | |
1675 | * is in user space so we verify it is OK and move it to kernel space. | |
1676 | * | |
1677 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1678 | * break bindings | |
1679 | * | |
1680 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1681 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1682 | * include the -EINPROGRESS status for such sockets. | |
1683 | */ | |
1684 | ||
20f37034 HC |
1685 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1686 | int, addrlen) | |
1da177e4 LT |
1687 | { |
1688 | struct socket *sock; | |
230b1839 | 1689 | struct sockaddr_storage address; |
6cb153ca | 1690 | int err, fput_needed; |
1da177e4 | 1691 | |
6cb153ca | 1692 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1693 | if (!sock) |
1694 | goto out; | |
43db362d | 1695 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1696 | if (err < 0) |
1697 | goto out_put; | |
1698 | ||
89bddce5 | 1699 | err = |
230b1839 | 1700 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1701 | if (err) |
1702 | goto out_put; | |
1703 | ||
230b1839 | 1704 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1705 | sock->file->f_flags); |
1706 | out_put: | |
6cb153ca | 1707 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1708 | out: |
1709 | return err; | |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * Get the local address ('name') of a socket object. Move the obtained | |
1714 | * name to user space. | |
1715 | */ | |
1716 | ||
20f37034 HC |
1717 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1718 | int __user *, usockaddr_len) | |
1da177e4 LT |
1719 | { |
1720 | struct socket *sock; | |
230b1839 | 1721 | struct sockaddr_storage address; |
6cb153ca | 1722 | int len, err, fput_needed; |
89bddce5 | 1723 | |
6cb153ca | 1724 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1725 | if (!sock) |
1726 | goto out; | |
1727 | ||
1728 | err = security_socket_getsockname(sock); | |
1729 | if (err) | |
1730 | goto out_put; | |
1731 | ||
230b1839 | 1732 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1733 | if (err) |
1734 | goto out_put; | |
43db362d | 1735 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1736 | |
1737 | out_put: | |
6cb153ca | 1738 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1739 | out: |
1740 | return err; | |
1741 | } | |
1742 | ||
1743 | /* | |
1744 | * Get the remote address ('name') of a socket object. Move the obtained | |
1745 | * name to user space. | |
1746 | */ | |
1747 | ||
20f37034 HC |
1748 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1749 | int __user *, usockaddr_len) | |
1da177e4 LT |
1750 | { |
1751 | struct socket *sock; | |
230b1839 | 1752 | struct sockaddr_storage address; |
6cb153ca | 1753 | int len, err, fput_needed; |
1da177e4 | 1754 | |
89bddce5 SH |
1755 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1756 | if (sock != NULL) { | |
1da177e4 LT |
1757 | err = security_socket_getpeername(sock); |
1758 | if (err) { | |
6cb153ca | 1759 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1760 | return err; |
1761 | } | |
1762 | ||
89bddce5 | 1763 | err = |
230b1839 | 1764 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1765 | 1); |
1da177e4 | 1766 | if (!err) |
43db362d | 1767 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1768 | usockaddr_len); |
6cb153ca | 1769 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1770 | } |
1771 | return err; | |
1772 | } | |
1773 | ||
1774 | /* | |
1775 | * Send a datagram to a given address. We move the address into kernel | |
1776 | * space and check the user space data area is readable before invoking | |
1777 | * the protocol. | |
1778 | */ | |
1779 | ||
3e0fa65f | 1780 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1781 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1782 | int, addr_len) |
1da177e4 LT |
1783 | { |
1784 | struct socket *sock; | |
230b1839 | 1785 | struct sockaddr_storage address; |
1da177e4 LT |
1786 | int err; |
1787 | struct msghdr msg; | |
1788 | struct iovec iov; | |
6cb153ca | 1789 | int fput_needed; |
6cb153ca | 1790 | |
253eacc0 LT |
1791 | if (len > INT_MAX) |
1792 | len = INT_MAX; | |
de0fa95c PE |
1793 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1794 | if (!sock) | |
4387ff75 | 1795 | goto out; |
6cb153ca | 1796 | |
89bddce5 SH |
1797 | iov.iov_base = buff; |
1798 | iov.iov_len = len; | |
1799 | msg.msg_name = NULL; | |
1800 | msg.msg_iov = &iov; | |
1801 | msg.msg_iovlen = 1; | |
1802 | msg.msg_control = NULL; | |
1803 | msg.msg_controllen = 0; | |
1804 | msg.msg_namelen = 0; | |
6cb153ca | 1805 | if (addr) { |
43db362d | 1806 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1807 | if (err < 0) |
1808 | goto out_put; | |
230b1839 | 1809 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1810 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1811 | } |
1812 | if (sock->file->f_flags & O_NONBLOCK) | |
1813 | flags |= MSG_DONTWAIT; | |
1814 | msg.msg_flags = flags; | |
1815 | err = sock_sendmsg(sock, &msg, len); | |
1816 | ||
89bddce5 | 1817 | out_put: |
de0fa95c | 1818 | fput_light(sock->file, fput_needed); |
4387ff75 | 1819 | out: |
1da177e4 LT |
1820 | return err; |
1821 | } | |
1822 | ||
1823 | /* | |
89bddce5 | 1824 | * Send a datagram down a socket. |
1da177e4 LT |
1825 | */ |
1826 | ||
3e0fa65f | 1827 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1828 | unsigned int, flags) |
1da177e4 LT |
1829 | { |
1830 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1831 | } | |
1832 | ||
1833 | /* | |
89bddce5 | 1834 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1835 | * sender. We verify the buffers are writable and if needed move the |
1836 | * sender address from kernel to user space. | |
1837 | */ | |
1838 | ||
3e0fa65f | 1839 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1840 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1841 | int __user *, addr_len) |
1da177e4 LT |
1842 | { |
1843 | struct socket *sock; | |
1844 | struct iovec iov; | |
1845 | struct msghdr msg; | |
230b1839 | 1846 | struct sockaddr_storage address; |
89bddce5 | 1847 | int err, err2; |
6cb153ca BL |
1848 | int fput_needed; |
1849 | ||
253eacc0 LT |
1850 | if (size > INT_MAX) |
1851 | size = INT_MAX; | |
de0fa95c | 1852 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1853 | if (!sock) |
de0fa95c | 1854 | goto out; |
1da177e4 | 1855 | |
89bddce5 SH |
1856 | msg.msg_control = NULL; |
1857 | msg.msg_controllen = 0; | |
1858 | msg.msg_iovlen = 1; | |
1859 | msg.msg_iov = &iov; | |
1860 | iov.iov_len = size; | |
1861 | iov.iov_base = ubuf; | |
f3d33426 HFS |
1862 | /* Save some cycles and don't copy the address if not needed */ |
1863 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1864 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1865 | msg.msg_namelen = 0; | |
1da177e4 LT |
1866 | if (sock->file->f_flags & O_NONBLOCK) |
1867 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1868 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1869 | |
89bddce5 | 1870 | if (err >= 0 && addr != NULL) { |
43db362d | 1871 | err2 = move_addr_to_user(&address, |
230b1839 | 1872 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1873 | if (err2 < 0) |
1874 | err = err2; | |
1da177e4 | 1875 | } |
de0fa95c PE |
1876 | |
1877 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1878 | out: |
1da177e4 LT |
1879 | return err; |
1880 | } | |
1881 | ||
1882 | /* | |
89bddce5 | 1883 | * Receive a datagram from a socket. |
1da177e4 LT |
1884 | */ |
1885 | ||
b7c0ddf5 JG |
1886 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
1887 | unsigned int, flags) | |
1da177e4 LT |
1888 | { |
1889 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1890 | } | |
1891 | ||
1892 | /* | |
1893 | * Set a socket option. Because we don't know the option lengths we have | |
1894 | * to pass the user mode parameter for the protocols to sort out. | |
1895 | */ | |
1896 | ||
20f37034 HC |
1897 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1898 | char __user *, optval, int, optlen) | |
1da177e4 | 1899 | { |
6cb153ca | 1900 | int err, fput_needed; |
1da177e4 LT |
1901 | struct socket *sock; |
1902 | ||
1903 | if (optlen < 0) | |
1904 | return -EINVAL; | |
89bddce5 SH |
1905 | |
1906 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1907 | if (sock != NULL) { | |
1908 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1909 | if (err) |
1910 | goto out_put; | |
1da177e4 LT |
1911 | |
1912 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1913 | err = |
1914 | sock_setsockopt(sock, level, optname, optval, | |
1915 | optlen); | |
1da177e4 | 1916 | else |
89bddce5 SH |
1917 | err = |
1918 | sock->ops->setsockopt(sock, level, optname, optval, | |
1919 | optlen); | |
6cb153ca BL |
1920 | out_put: |
1921 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1922 | } |
1923 | return err; | |
1924 | } | |
1925 | ||
1926 | /* | |
1927 | * Get a socket option. Because we don't know the option lengths we have | |
1928 | * to pass a user mode parameter for the protocols to sort out. | |
1929 | */ | |
1930 | ||
20f37034 HC |
1931 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1932 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1933 | { |
6cb153ca | 1934 | int err, fput_needed; |
1da177e4 LT |
1935 | struct socket *sock; |
1936 | ||
89bddce5 SH |
1937 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1938 | if (sock != NULL) { | |
6cb153ca BL |
1939 | err = security_socket_getsockopt(sock, level, optname); |
1940 | if (err) | |
1941 | goto out_put; | |
1da177e4 LT |
1942 | |
1943 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1944 | err = |
1945 | sock_getsockopt(sock, level, optname, optval, | |
1946 | optlen); | |
1da177e4 | 1947 | else |
89bddce5 SH |
1948 | err = |
1949 | sock->ops->getsockopt(sock, level, optname, optval, | |
1950 | optlen); | |
6cb153ca BL |
1951 | out_put: |
1952 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1953 | } |
1954 | return err; | |
1955 | } | |
1956 | ||
1da177e4 LT |
1957 | /* |
1958 | * Shutdown a socket. | |
1959 | */ | |
1960 | ||
754fe8d2 | 1961 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1962 | { |
6cb153ca | 1963 | int err, fput_needed; |
1da177e4 LT |
1964 | struct socket *sock; |
1965 | ||
89bddce5 SH |
1966 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1967 | if (sock != NULL) { | |
1da177e4 | 1968 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1969 | if (!err) |
1970 | err = sock->ops->shutdown(sock, how); | |
1971 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1972 | } |
1973 | return err; | |
1974 | } | |
1975 | ||
89bddce5 | 1976 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1977 | * fields which are the same type (int / unsigned) on our platforms. |
1978 | */ | |
1979 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1980 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1981 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1982 | ||
c71d8ebe TH |
1983 | struct used_address { |
1984 | struct sockaddr_storage name; | |
1985 | unsigned int name_len; | |
1986 | }; | |
1987 | ||
1661bf36 DC |
1988 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
1989 | struct msghdr __user *umsg) | |
1990 | { | |
1991 | if (copy_from_user(kmsg, umsg, sizeof(struct msghdr))) | |
1992 | return -EFAULT; | |
dbb490b9 ML |
1993 | |
1994 | if (kmsg->msg_namelen < 0) | |
1995 | return -EINVAL; | |
1996 | ||
1661bf36 | 1997 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 1998 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
1661bf36 DC |
1999 | return 0; |
2000 | } | |
2001 | ||
a7526eb5 | 2002 | static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2003 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 2004 | struct used_address *used_address) |
1da177e4 | 2005 | { |
89bddce5 SH |
2006 | struct compat_msghdr __user *msg_compat = |
2007 | (struct compat_msghdr __user *)msg; | |
230b1839 | 2008 | struct sockaddr_storage address; |
1da177e4 | 2009 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 2010 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
2011 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
2012 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 2013 | unsigned char *ctl_buf = ctl; |
a74e9106 | 2014 | int err, ctl_len, total_len; |
89bddce5 | 2015 | |
1da177e4 LT |
2016 | err = -EFAULT; |
2017 | if (MSG_CMSG_COMPAT & flags) { | |
228e548e | 2018 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2019 | return -EFAULT; |
1661bf36 DC |
2020 | } else { |
2021 | err = copy_msghdr_from_user(msg_sys, msg); | |
2022 | if (err) | |
2023 | return err; | |
2024 | } | |
1da177e4 | 2025 | |
228e548e | 2026 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2027 | err = -EMSGSIZE; |
2028 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2029 | goto out; | |
2030 | err = -ENOMEM; | |
2031 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2032 | GFP_KERNEL); | |
1da177e4 | 2033 | if (!iov) |
228e548e | 2034 | goto out; |
1da177e4 LT |
2035 | } |
2036 | ||
2037 | /* This will also move the address data into kernel space */ | |
2038 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2039 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 2040 | } else |
43db362d | 2041 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 2042 | if (err < 0) |
1da177e4 LT |
2043 | goto out_freeiov; |
2044 | total_len = err; | |
2045 | ||
2046 | err = -ENOBUFS; | |
2047 | ||
228e548e | 2048 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2049 | goto out_freeiov; |
228e548e | 2050 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2051 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2052 | err = |
228e548e | 2053 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2054 | sizeof(ctl)); |
1da177e4 LT |
2055 | if (err) |
2056 | goto out_freeiov; | |
228e548e AB |
2057 | ctl_buf = msg_sys->msg_control; |
2058 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2059 | } else if (ctl_len) { |
89bddce5 | 2060 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2061 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2062 | if (ctl_buf == NULL) |
1da177e4 LT |
2063 | goto out_freeiov; |
2064 | } | |
2065 | err = -EFAULT; | |
2066 | /* | |
228e548e | 2067 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2068 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2069 | * checking falls down on this. | |
2070 | */ | |
fb8621bb | 2071 | if (copy_from_user(ctl_buf, |
228e548e | 2072 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2073 | ctl_len)) |
1da177e4 | 2074 | goto out_freectl; |
228e548e | 2075 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2076 | } |
228e548e | 2077 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2078 | |
2079 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2080 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2081 | /* |
2082 | * If this is sendmmsg() and current destination address is same as | |
2083 | * previously succeeded address, omit asking LSM's decision. | |
2084 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2085 | * destination address never matches. | |
2086 | */ | |
bc909d9d MD |
2087 | if (used_address && msg_sys->msg_name && |
2088 | used_address->name_len == msg_sys->msg_namelen && | |
2089 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
2090 | used_address->name_len)) { |
2091 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2092 | goto out_freectl; | |
2093 | } | |
2094 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2095 | /* | |
2096 | * If this is sendmmsg() and sending to current destination address was | |
2097 | * successful, remember it. | |
2098 | */ | |
2099 | if (used_address && err >= 0) { | |
2100 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2101 | if (msg_sys->msg_name) |
2102 | memcpy(&used_address->name, msg_sys->msg_name, | |
2103 | used_address->name_len); | |
c71d8ebe | 2104 | } |
1da177e4 LT |
2105 | |
2106 | out_freectl: | |
89bddce5 | 2107 | if (ctl_buf != ctl) |
1da177e4 LT |
2108 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2109 | out_freeiov: | |
2110 | if (iov != iovstack) | |
a74e9106 | 2111 | kfree(iov); |
228e548e AB |
2112 | out: |
2113 | return err; | |
2114 | } | |
2115 | ||
2116 | /* | |
2117 | * BSD sendmsg interface | |
2118 | */ | |
2119 | ||
a7526eb5 | 2120 | long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
228e548e AB |
2121 | { |
2122 | int fput_needed, err; | |
2123 | struct msghdr msg_sys; | |
1be374a0 AL |
2124 | struct socket *sock; |
2125 | ||
1be374a0 | 2126 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2127 | if (!sock) |
2128 | goto out; | |
2129 | ||
a7526eb5 | 2130 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2131 | |
6cb153ca | 2132 | fput_light(sock->file, fput_needed); |
89bddce5 | 2133 | out: |
1da177e4 LT |
2134 | return err; |
2135 | } | |
2136 | ||
a7526eb5 AL |
2137 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
2138 | { | |
2139 | if (flags & MSG_CMSG_COMPAT) | |
2140 | return -EINVAL; | |
2141 | return __sys_sendmsg(fd, msg, flags); | |
2142 | } | |
2143 | ||
228e548e AB |
2144 | /* |
2145 | * Linux sendmmsg interface | |
2146 | */ | |
2147 | ||
2148 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2149 | unsigned int flags) | |
2150 | { | |
2151 | int fput_needed, err, datagrams; | |
2152 | struct socket *sock; | |
2153 | struct mmsghdr __user *entry; | |
2154 | struct compat_mmsghdr __user *compat_entry; | |
2155 | struct msghdr msg_sys; | |
c71d8ebe | 2156 | struct used_address used_address; |
228e548e | 2157 | |
98382f41 AB |
2158 | if (vlen > UIO_MAXIOV) |
2159 | vlen = UIO_MAXIOV; | |
228e548e AB |
2160 | |
2161 | datagrams = 0; | |
2162 | ||
2163 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2164 | if (!sock) | |
2165 | return err; | |
2166 | ||
c71d8ebe | 2167 | used_address.name_len = UINT_MAX; |
228e548e AB |
2168 | entry = mmsg; |
2169 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2170 | err = 0; |
228e548e AB |
2171 | |
2172 | while (datagrams < vlen) { | |
228e548e | 2173 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2174 | err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
2175 | &msg_sys, flags, &used_address); | |
228e548e AB |
2176 | if (err < 0) |
2177 | break; | |
2178 | err = __put_user(err, &compat_entry->msg_len); | |
2179 | ++compat_entry; | |
2180 | } else { | |
a7526eb5 AL |
2181 | err = ___sys_sendmsg(sock, |
2182 | (struct msghdr __user *)entry, | |
2183 | &msg_sys, flags, &used_address); | |
228e548e AB |
2184 | if (err < 0) |
2185 | break; | |
2186 | err = put_user(err, &entry->msg_len); | |
2187 | ++entry; | |
2188 | } | |
2189 | ||
2190 | if (err) | |
2191 | break; | |
2192 | ++datagrams; | |
2193 | } | |
2194 | ||
228e548e AB |
2195 | fput_light(sock->file, fput_needed); |
2196 | ||
728ffb86 AB |
2197 | /* We only return an error if no datagrams were able to be sent */ |
2198 | if (datagrams != 0) | |
228e548e AB |
2199 | return datagrams; |
2200 | ||
228e548e AB |
2201 | return err; |
2202 | } | |
2203 | ||
2204 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2205 | unsigned int, vlen, unsigned int, flags) | |
2206 | { | |
1be374a0 AL |
2207 | if (flags & MSG_CMSG_COMPAT) |
2208 | return -EINVAL; | |
228e548e AB |
2209 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2210 | } | |
2211 | ||
a7526eb5 | 2212 | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2213 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2214 | { |
89bddce5 SH |
2215 | struct compat_msghdr __user *msg_compat = |
2216 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2217 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2218 | struct iovec *iov = iovstack; |
1da177e4 | 2219 | unsigned long cmsg_ptr; |
a74e9106 | 2220 | int err, total_len, len; |
1da177e4 LT |
2221 | |
2222 | /* kernel mode address */ | |
230b1839 | 2223 | struct sockaddr_storage addr; |
1da177e4 LT |
2224 | |
2225 | /* user mode address pointers */ | |
2226 | struct sockaddr __user *uaddr; | |
2227 | int __user *uaddr_len; | |
89bddce5 | 2228 | |
1da177e4 | 2229 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2230 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2231 | return -EFAULT; |
1661bf36 DC |
2232 | } else { |
2233 | err = copy_msghdr_from_user(msg_sys, msg); | |
2234 | if (err) | |
2235 | return err; | |
2236 | } | |
1da177e4 | 2237 | |
a2e27255 | 2238 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2239 | err = -EMSGSIZE; |
2240 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2241 | goto out; | |
2242 | err = -ENOMEM; | |
2243 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2244 | GFP_KERNEL); | |
1da177e4 | 2245 | if (!iov) |
a2e27255 | 2246 | goto out; |
1da177e4 LT |
2247 | } |
2248 | ||
f3d33426 HFS |
2249 | /* Save the user-mode address (verify_iovec will change the |
2250 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2251 | */ |
a2e27255 | 2252 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 | 2253 | uaddr_len = COMPAT_NAMELEN(msg); |
f3d33426 | 2254 | if (MSG_CMSG_COMPAT & flags) |
43db362d | 2255 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
f3d33426 | 2256 | else |
43db362d | 2257 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2258 | if (err < 0) |
2259 | goto out_freeiov; | |
89bddce5 | 2260 | total_len = err; |
1da177e4 | 2261 | |
a2e27255 ACM |
2262 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2263 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2264 | |
f3d33426 HFS |
2265 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2266 | msg_sys->msg_namelen = 0; | |
2267 | ||
1da177e4 LT |
2268 | if (sock->file->f_flags & O_NONBLOCK) |
2269 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2270 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2271 | total_len, flags); | |
1da177e4 LT |
2272 | if (err < 0) |
2273 | goto out_freeiov; | |
2274 | len = err; | |
2275 | ||
2276 | if (uaddr != NULL) { | |
43db362d | 2277 | err = move_addr_to_user(&addr, |
a2e27255 | 2278 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2279 | uaddr_len); |
1da177e4 LT |
2280 | if (err < 0) |
2281 | goto out_freeiov; | |
2282 | } | |
a2e27255 | 2283 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2284 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2285 | if (err) |
2286 | goto out_freeiov; | |
2287 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2288 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2289 | &msg_compat->msg_controllen); |
2290 | else | |
a2e27255 | 2291 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2292 | &msg->msg_controllen); |
2293 | if (err) | |
2294 | goto out_freeiov; | |
2295 | err = len; | |
2296 | ||
2297 | out_freeiov: | |
2298 | if (iov != iovstack) | |
a74e9106 | 2299 | kfree(iov); |
a2e27255 ACM |
2300 | out: |
2301 | return err; | |
2302 | } | |
2303 | ||
2304 | /* | |
2305 | * BSD recvmsg interface | |
2306 | */ | |
2307 | ||
a7526eb5 | 2308 | long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2309 | { |
2310 | int fput_needed, err; | |
2311 | struct msghdr msg_sys; | |
1be374a0 AL |
2312 | struct socket *sock; |
2313 | ||
1be374a0 | 2314 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2315 | if (!sock) |
2316 | goto out; | |
2317 | ||
a7526eb5 | 2318 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2319 | |
6cb153ca | 2320 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2321 | out: |
2322 | return err; | |
2323 | } | |
2324 | ||
a7526eb5 AL |
2325 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
2326 | unsigned int, flags) | |
2327 | { | |
2328 | if (flags & MSG_CMSG_COMPAT) | |
2329 | return -EINVAL; | |
2330 | return __sys_recvmsg(fd, msg, flags); | |
2331 | } | |
2332 | ||
a2e27255 ACM |
2333 | /* |
2334 | * Linux recvmmsg interface | |
2335 | */ | |
2336 | ||
2337 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2338 | unsigned int flags, struct timespec *timeout) | |
2339 | { | |
2340 | int fput_needed, err, datagrams; | |
2341 | struct socket *sock; | |
2342 | struct mmsghdr __user *entry; | |
d7256d0e | 2343 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2344 | struct msghdr msg_sys; |
2345 | struct timespec end_time; | |
2346 | ||
2347 | if (timeout && | |
2348 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2349 | timeout->tv_nsec)) | |
2350 | return -EINVAL; | |
2351 | ||
2352 | datagrams = 0; | |
2353 | ||
2354 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2355 | if (!sock) | |
2356 | return err; | |
2357 | ||
2358 | err = sock_error(sock->sk); | |
2359 | if (err) | |
2360 | goto out_put; | |
2361 | ||
2362 | entry = mmsg; | |
d7256d0e | 2363 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2364 | |
2365 | while (datagrams < vlen) { | |
2366 | /* | |
2367 | * No need to ask LSM for more than the first datagram. | |
2368 | */ | |
d7256d0e | 2369 | if (MSG_CMSG_COMPAT & flags) { |
a7526eb5 AL |
2370 | err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
2371 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2372 | datagrams); | |
d7256d0e JMG |
2373 | if (err < 0) |
2374 | break; | |
2375 | err = __put_user(err, &compat_entry->msg_len); | |
2376 | ++compat_entry; | |
2377 | } else { | |
a7526eb5 AL |
2378 | err = ___sys_recvmsg(sock, |
2379 | (struct msghdr __user *)entry, | |
2380 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2381 | datagrams); | |
d7256d0e JMG |
2382 | if (err < 0) |
2383 | break; | |
2384 | err = put_user(err, &entry->msg_len); | |
2385 | ++entry; | |
2386 | } | |
2387 | ||
a2e27255 ACM |
2388 | if (err) |
2389 | break; | |
a2e27255 ACM |
2390 | ++datagrams; |
2391 | ||
71c5c159 BB |
2392 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2393 | if (flags & MSG_WAITFORONE) | |
2394 | flags |= MSG_DONTWAIT; | |
2395 | ||
a2e27255 ACM |
2396 | if (timeout) { |
2397 | ktime_get_ts(timeout); | |
2398 | *timeout = timespec_sub(end_time, *timeout); | |
2399 | if (timeout->tv_sec < 0) { | |
2400 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2401 | break; | |
2402 | } | |
2403 | ||
2404 | /* Timeout, return less than vlen datagrams */ | |
2405 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2406 | break; | |
2407 | } | |
2408 | ||
2409 | /* Out of band data, return right away */ | |
2410 | if (msg_sys.msg_flags & MSG_OOB) | |
2411 | break; | |
2412 | } | |
2413 | ||
2414 | out_put: | |
2415 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2416 | |
a2e27255 ACM |
2417 | if (err == 0) |
2418 | return datagrams; | |
2419 | ||
2420 | if (datagrams != 0) { | |
2421 | /* | |
2422 | * We may return less entries than requested (vlen) if the | |
2423 | * sock is non block and there aren't enough datagrams... | |
2424 | */ | |
2425 | if (err != -EAGAIN) { | |
2426 | /* | |
2427 | * ... or if recvmsg returns an error after we | |
2428 | * received some datagrams, where we record the | |
2429 | * error to return on the next call or if the | |
2430 | * app asks about it using getsockopt(SO_ERROR). | |
2431 | */ | |
2432 | sock->sk->sk_err = -err; | |
2433 | } | |
2434 | ||
2435 | return datagrams; | |
2436 | } | |
2437 | ||
2438 | return err; | |
2439 | } | |
2440 | ||
2441 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2442 | unsigned int, vlen, unsigned int, flags, | |
2443 | struct timespec __user *, timeout) | |
2444 | { | |
2445 | int datagrams; | |
2446 | struct timespec timeout_sys; | |
2447 | ||
1be374a0 AL |
2448 | if (flags & MSG_CMSG_COMPAT) |
2449 | return -EINVAL; | |
2450 | ||
a2e27255 ACM |
2451 | if (!timeout) |
2452 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2453 | ||
2454 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2455 | return -EFAULT; | |
2456 | ||
2457 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2458 | ||
2459 | if (datagrams > 0 && | |
2460 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2461 | datagrams = -EFAULT; | |
2462 | ||
2463 | return datagrams; | |
2464 | } | |
2465 | ||
2466 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2467 | /* Argument list sizes for sys_socketcall */ |
2468 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2469 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2470 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2471 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2472 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2473 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2474 | }; |
2475 | ||
1da177e4 LT |
2476 | #undef AL |
2477 | ||
2478 | /* | |
89bddce5 | 2479 | * System call vectors. |
1da177e4 LT |
2480 | * |
2481 | * Argument checking cleaned up. Saved 20% in size. | |
2482 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2483 | * it is set by the callees. |
1da177e4 LT |
2484 | */ |
2485 | ||
3e0fa65f | 2486 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2487 | { |
2950fa9d | 2488 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2489 | unsigned long a0, a1; |
1da177e4 | 2490 | int err; |
47379052 | 2491 | unsigned int len; |
1da177e4 | 2492 | |
228e548e | 2493 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2494 | return -EINVAL; |
2495 | ||
47379052 AV |
2496 | len = nargs[call]; |
2497 | if (len > sizeof(a)) | |
2498 | return -EINVAL; | |
2499 | ||
1da177e4 | 2500 | /* copy_from_user should be SMP safe. */ |
47379052 | 2501 | if (copy_from_user(a, args, len)) |
1da177e4 | 2502 | return -EFAULT; |
3ec3b2fb | 2503 | |
2950fa9d CG |
2504 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2505 | if (err) | |
2506 | return err; | |
3ec3b2fb | 2507 | |
89bddce5 SH |
2508 | a0 = a[0]; |
2509 | a1 = a[1]; | |
2510 | ||
2511 | switch (call) { | |
2512 | case SYS_SOCKET: | |
2513 | err = sys_socket(a0, a1, a[2]); | |
2514 | break; | |
2515 | case SYS_BIND: | |
2516 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2517 | break; | |
2518 | case SYS_CONNECT: | |
2519 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2520 | break; | |
2521 | case SYS_LISTEN: | |
2522 | err = sys_listen(a0, a1); | |
2523 | break; | |
2524 | case SYS_ACCEPT: | |
de11defe UD |
2525 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2526 | (int __user *)a[2], 0); | |
89bddce5 SH |
2527 | break; |
2528 | case SYS_GETSOCKNAME: | |
2529 | err = | |
2530 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2531 | (int __user *)a[2]); | |
2532 | break; | |
2533 | case SYS_GETPEERNAME: | |
2534 | err = | |
2535 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2536 | (int __user *)a[2]); | |
2537 | break; | |
2538 | case SYS_SOCKETPAIR: | |
2539 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2540 | break; | |
2541 | case SYS_SEND: | |
2542 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2543 | break; | |
2544 | case SYS_SENDTO: | |
2545 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2546 | (struct sockaddr __user *)a[4], a[5]); | |
2547 | break; | |
2548 | case SYS_RECV: | |
2549 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2550 | break; | |
2551 | case SYS_RECVFROM: | |
2552 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2553 | (struct sockaddr __user *)a[4], | |
2554 | (int __user *)a[5]); | |
2555 | break; | |
2556 | case SYS_SHUTDOWN: | |
2557 | err = sys_shutdown(a0, a1); | |
2558 | break; | |
2559 | case SYS_SETSOCKOPT: | |
2560 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2561 | break; | |
2562 | case SYS_GETSOCKOPT: | |
2563 | err = | |
2564 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2565 | (int __user *)a[4]); | |
2566 | break; | |
2567 | case SYS_SENDMSG: | |
2568 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2569 | break; | |
228e548e AB |
2570 | case SYS_SENDMMSG: |
2571 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2572 | break; | |
89bddce5 SH |
2573 | case SYS_RECVMSG: |
2574 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2575 | break; | |
a2e27255 ACM |
2576 | case SYS_RECVMMSG: |
2577 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2578 | (struct timespec __user *)a[4]); | |
2579 | break; | |
de11defe UD |
2580 | case SYS_ACCEPT4: |
2581 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2582 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2583 | break; |
89bddce5 SH |
2584 | default: |
2585 | err = -EINVAL; | |
2586 | break; | |
1da177e4 LT |
2587 | } |
2588 | return err; | |
2589 | } | |
2590 | ||
89bddce5 | 2591 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2592 | |
55737fda SH |
2593 | /** |
2594 | * sock_register - add a socket protocol handler | |
2595 | * @ops: description of protocol | |
2596 | * | |
1da177e4 LT |
2597 | * This function is called by a protocol handler that wants to |
2598 | * advertise its address family, and have it linked into the | |
55737fda SH |
2599 | * socket interface. The value ops->family coresponds to the |
2600 | * socket system call protocol family. | |
1da177e4 | 2601 | */ |
f0fd27d4 | 2602 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2603 | { |
2604 | int err; | |
2605 | ||
2606 | if (ops->family >= NPROTO) { | |
3410f22e | 2607 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
1da177e4 LT |
2608 | return -ENOBUFS; |
2609 | } | |
55737fda SH |
2610 | |
2611 | spin_lock(&net_family_lock); | |
190683a9 ED |
2612 | if (rcu_dereference_protected(net_families[ops->family], |
2613 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2614 | err = -EEXIST; |
2615 | else { | |
cf778b00 | 2616 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2617 | err = 0; |
2618 | } | |
55737fda SH |
2619 | spin_unlock(&net_family_lock); |
2620 | ||
3410f22e | 2621 | pr_info("NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2622 | return err; |
2623 | } | |
c6d409cf | 2624 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2625 | |
55737fda SH |
2626 | /** |
2627 | * sock_unregister - remove a protocol handler | |
2628 | * @family: protocol family to remove | |
2629 | * | |
1da177e4 LT |
2630 | * This function is called by a protocol handler that wants to |
2631 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2632 | * new socket creation. |
2633 | * | |
2634 | * If protocol handler is a module, then it can use module reference | |
2635 | * counts to protect against new references. If protocol handler is not | |
2636 | * a module then it needs to provide its own protection in | |
2637 | * the ops->create routine. | |
1da177e4 | 2638 | */ |
f0fd27d4 | 2639 | void sock_unregister(int family) |
1da177e4 | 2640 | { |
f0fd27d4 | 2641 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2642 | |
55737fda | 2643 | spin_lock(&net_family_lock); |
a9b3cd7f | 2644 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2645 | spin_unlock(&net_family_lock); |
2646 | ||
2647 | synchronize_rcu(); | |
2648 | ||
3410f22e | 2649 | pr_info("NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2650 | } |
c6d409cf | 2651 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2652 | |
77d76ea3 | 2653 | static int __init sock_init(void) |
1da177e4 | 2654 | { |
b3e19d92 | 2655 | int err; |
2ca794e5 EB |
2656 | /* |
2657 | * Initialize the network sysctl infrastructure. | |
2658 | */ | |
2659 | err = net_sysctl_init(); | |
2660 | if (err) | |
2661 | goto out; | |
b3e19d92 | 2662 | |
1da177e4 | 2663 | /* |
89bddce5 | 2664 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2665 | */ |
2666 | skb_init(); | |
1da177e4 LT |
2667 | |
2668 | /* | |
89bddce5 | 2669 | * Initialize the protocols module. |
1da177e4 LT |
2670 | */ |
2671 | ||
2672 | init_inodecache(); | |
b3e19d92 NP |
2673 | |
2674 | err = register_filesystem(&sock_fs_type); | |
2675 | if (err) | |
2676 | goto out_fs; | |
1da177e4 | 2677 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2678 | if (IS_ERR(sock_mnt)) { |
2679 | err = PTR_ERR(sock_mnt); | |
2680 | goto out_mount; | |
2681 | } | |
77d76ea3 AK |
2682 | |
2683 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2684 | */ |
2685 | ||
2686 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2687 | err = netfilter_init(); |
2688 | if (err) | |
2689 | goto out; | |
1da177e4 | 2690 | #endif |
cbeb321a | 2691 | |
408eccce | 2692 | ptp_classifier_init(); |
c1f19b51 | 2693 | |
b3e19d92 NP |
2694 | out: |
2695 | return err; | |
2696 | ||
2697 | out_mount: | |
2698 | unregister_filesystem(&sock_fs_type); | |
2699 | out_fs: | |
2700 | goto out; | |
1da177e4 LT |
2701 | } |
2702 | ||
77d76ea3 AK |
2703 | core_initcall(sock_init); /* early initcall */ |
2704 | ||
1da177e4 LT |
2705 | #ifdef CONFIG_PROC_FS |
2706 | void socket_seq_show(struct seq_file *seq) | |
2707 | { | |
2708 | int cpu; | |
2709 | int counter = 0; | |
2710 | ||
6f912042 | 2711 | for_each_possible_cpu(cpu) |
89bddce5 | 2712 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2713 | |
2714 | /* It can be negative, by the way. 8) */ | |
2715 | if (counter < 0) | |
2716 | counter = 0; | |
2717 | ||
2718 | seq_printf(seq, "sockets: used %d\n", counter); | |
2719 | } | |
89bddce5 | 2720 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2721 | |
89bbfc95 | 2722 | #ifdef CONFIG_COMPAT |
6b96018b | 2723 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2724 | unsigned int cmd, void __user *up) |
7a229387 | 2725 | { |
7a229387 AB |
2726 | mm_segment_t old_fs = get_fs(); |
2727 | struct timeval ktv; | |
2728 | int err; | |
2729 | ||
2730 | set_fs(KERNEL_DS); | |
6b96018b | 2731 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2732 | set_fs(old_fs); |
644595f8 | 2733 | if (!err) |
ed6fe9d6 | 2734 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2735 | |
7a229387 AB |
2736 | return err; |
2737 | } | |
2738 | ||
6b96018b | 2739 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2740 | unsigned int cmd, void __user *up) |
7a229387 | 2741 | { |
7a229387 AB |
2742 | mm_segment_t old_fs = get_fs(); |
2743 | struct timespec kts; | |
2744 | int err; | |
2745 | ||
2746 | set_fs(KERNEL_DS); | |
6b96018b | 2747 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2748 | set_fs(old_fs); |
644595f8 | 2749 | if (!err) |
ed6fe9d6 | 2750 | err = compat_put_timespec(&kts, up); |
644595f8 | 2751 | |
7a229387 AB |
2752 | return err; |
2753 | } | |
2754 | ||
6b96018b | 2755 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2756 | { |
2757 | struct ifreq __user *uifr; | |
2758 | int err; | |
2759 | ||
2760 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2761 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2762 | return -EFAULT; |
2763 | ||
6b96018b | 2764 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2765 | if (err) |
2766 | return err; | |
2767 | ||
6b96018b | 2768 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2769 | return -EFAULT; |
2770 | ||
2771 | return 0; | |
2772 | } | |
2773 | ||
6b96018b | 2774 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2775 | { |
6b96018b | 2776 | struct compat_ifconf ifc32; |
7a229387 AB |
2777 | struct ifconf ifc; |
2778 | struct ifconf __user *uifc; | |
6b96018b | 2779 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2780 | struct ifreq __user *ifr; |
2781 | unsigned int i, j; | |
2782 | int err; | |
2783 | ||
6b96018b | 2784 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2785 | return -EFAULT; |
2786 | ||
43da5f2e | 2787 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2788 | if (ifc32.ifcbuf == 0) { |
2789 | ifc32.ifc_len = 0; | |
2790 | ifc.ifc_len = 0; | |
2791 | ifc.ifc_req = NULL; | |
2792 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2793 | } else { | |
c6d409cf ED |
2794 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2795 | sizeof(struct ifreq); | |
7a229387 AB |
2796 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2797 | ifc.ifc_len = len; | |
2798 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2799 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2800 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2801 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2802 | return -EFAULT; |
2803 | ifr++; | |
2804 | ifr32++; | |
2805 | } | |
2806 | } | |
2807 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2808 | return -EFAULT; | |
2809 | ||
6b96018b | 2810 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2811 | if (err) |
2812 | return err; | |
2813 | ||
2814 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2815 | return -EFAULT; | |
2816 | ||
2817 | ifr = ifc.ifc_req; | |
2818 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2819 | for (i = 0, j = 0; | |
c6d409cf ED |
2820 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2821 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2822 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2823 | return -EFAULT; |
2824 | ifr32++; | |
2825 | ifr++; | |
2826 | } | |
2827 | ||
2828 | if (ifc32.ifcbuf == 0) { | |
2829 | /* Translate from 64-bit structure multiple to | |
2830 | * a 32-bit one. | |
2831 | */ | |
2832 | i = ifc.ifc_len; | |
6b96018b | 2833 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2834 | ifc32.ifc_len = i; |
2835 | } else { | |
2836 | ifc32.ifc_len = i; | |
2837 | } | |
6b96018b | 2838 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2839 | return -EFAULT; |
2840 | ||
2841 | return 0; | |
2842 | } | |
2843 | ||
6b96018b | 2844 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2845 | { |
3a7da39d BH |
2846 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2847 | bool convert_in = false, convert_out = false; | |
2848 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2849 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2850 | struct ifreq __user *ifr; |
3a7da39d BH |
2851 | u32 rule_cnt = 0, actual_rule_cnt; |
2852 | u32 ethcmd; | |
7a229387 | 2853 | u32 data; |
3a7da39d | 2854 | int ret; |
7a229387 | 2855 | |
3a7da39d BH |
2856 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2857 | return -EFAULT; | |
7a229387 | 2858 | |
3a7da39d BH |
2859 | compat_rxnfc = compat_ptr(data); |
2860 | ||
2861 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2862 | return -EFAULT; |
2863 | ||
3a7da39d BH |
2864 | /* Most ethtool structures are defined without padding. |
2865 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2866 | */ | |
2867 | switch (ethcmd) { | |
2868 | default: | |
2869 | break; | |
2870 | case ETHTOOL_GRXCLSRLALL: | |
2871 | /* Buffer size is variable */ | |
2872 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2873 | return -EFAULT; | |
2874 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2875 | return -ENOMEM; | |
2876 | buf_size += rule_cnt * sizeof(u32); | |
2877 | /* fall through */ | |
2878 | case ETHTOOL_GRXRINGS: | |
2879 | case ETHTOOL_GRXCLSRLCNT: | |
2880 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2881 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2882 | convert_out = true; |
2883 | /* fall through */ | |
2884 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2885 | buf_size += sizeof(struct ethtool_rxnfc); |
2886 | convert_in = true; | |
2887 | break; | |
2888 | } | |
2889 | ||
2890 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2891 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2892 | |
2893 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2894 | return -EFAULT; |
2895 | ||
3a7da39d BH |
2896 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2897 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2898 | return -EFAULT; |
2899 | ||
3a7da39d | 2900 | if (convert_in) { |
127fe533 | 2901 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2902 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2903 | */ | |
127fe533 AD |
2904 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2905 | sizeof(compat_rxnfc->fs.m_ext) != | |
2906 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2907 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2908 | BUILD_BUG_ON( |
2909 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2910 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2911 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2912 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2913 | ||
2914 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2915 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2916 | (void __user *)rxnfc) || | |
3a7da39d BH |
2917 | copy_in_user(&rxnfc->fs.ring_cookie, |
2918 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2919 | (void __user *)(&rxnfc->fs.location + 1) - |
2920 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2921 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2922 | sizeof(rxnfc->rule_cnt))) | |
2923 | return -EFAULT; | |
2924 | } | |
2925 | ||
2926 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2927 | if (ret) | |
2928 | return ret; | |
2929 | ||
2930 | if (convert_out) { | |
2931 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2932 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2933 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2934 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2935 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2936 | (const void __user *)(&rxnfc->fs.location + 1) - |
2937 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2938 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2939 | sizeof(rxnfc->rule_cnt))) | |
2940 | return -EFAULT; | |
2941 | ||
2942 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2943 | /* As an optimisation, we only copy the actual | |
2944 | * number of rules that the underlying | |
2945 | * function returned. Since Mallory might | |
2946 | * change the rule count in user memory, we | |
2947 | * check that it is less than the rule count | |
2948 | * originally given (as the user buffer size), | |
2949 | * which has been range-checked. | |
2950 | */ | |
2951 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2952 | return -EFAULT; | |
2953 | if (actual_rule_cnt < rule_cnt) | |
2954 | rule_cnt = actual_rule_cnt; | |
2955 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2956 | &rxnfc->rule_locs[0], | |
2957 | rule_cnt * sizeof(u32))) | |
2958 | return -EFAULT; | |
2959 | } | |
2960 | } | |
2961 | ||
2962 | return 0; | |
7a229387 AB |
2963 | } |
2964 | ||
7a50a240 AB |
2965 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2966 | { | |
2967 | void __user *uptr; | |
2968 | compat_uptr_t uptr32; | |
2969 | struct ifreq __user *uifr; | |
2970 | ||
c6d409cf | 2971 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2972 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2973 | return -EFAULT; | |
2974 | ||
2975 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2976 | return -EFAULT; | |
2977 | ||
2978 | uptr = compat_ptr(uptr32); | |
2979 | ||
2980 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2981 | return -EFAULT; | |
2982 | ||
2983 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2984 | } | |
2985 | ||
6b96018b AB |
2986 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2987 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2988 | { |
2989 | struct ifreq kifr; | |
7a229387 AB |
2990 | mm_segment_t old_fs; |
2991 | int err; | |
7a229387 AB |
2992 | |
2993 | switch (cmd) { | |
2994 | case SIOCBONDENSLAVE: | |
2995 | case SIOCBONDRELEASE: | |
2996 | case SIOCBONDSETHWADDR: | |
2997 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2998 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2999 | return -EFAULT; |
3000 | ||
3001 | old_fs = get_fs(); | |
c6d409cf | 3002 | set_fs(KERNEL_DS); |
c3f52ae6 | 3003 | err = dev_ioctl(net, cmd, |
3004 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 3005 | set_fs(old_fs); |
7a229387 AB |
3006 | |
3007 | return err; | |
7a229387 | 3008 | default: |
07d106d0 | 3009 | return -ENOIOCTLCMD; |
ccbd6a5a | 3010 | } |
7a229387 AB |
3011 | } |
3012 | ||
590d4693 BH |
3013 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
3014 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, | |
6b96018b | 3015 | struct compat_ifreq __user *u_ifreq32) |
7a229387 AB |
3016 | { |
3017 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
3018 | char tmp_buf[IFNAMSIZ]; |
3019 | void __user *data64; | |
3020 | u32 data32; | |
3021 | ||
3022 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
3023 | IFNAMSIZ)) | |
3024 | return -EFAULT; | |
417c3522 | 3025 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
7a229387 AB |
3026 | return -EFAULT; |
3027 | data64 = compat_ptr(data32); | |
3028 | ||
3029 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
3030 | ||
7a229387 AB |
3031 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
3032 | IFNAMSIZ)) | |
3033 | return -EFAULT; | |
417c3522 | 3034 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
7a229387 AB |
3035 | return -EFAULT; |
3036 | ||
6b96018b | 3037 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
3038 | } |
3039 | ||
6b96018b AB |
3040 | static int dev_ifsioc(struct net *net, struct socket *sock, |
3041 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 3042 | { |
a2116ed2 | 3043 | struct ifreq __user *uifr; |
7a229387 AB |
3044 | int err; |
3045 | ||
a2116ed2 AB |
3046 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
3047 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
3048 | return -EFAULT; | |
3049 | ||
3050 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
3051 | ||
7a229387 AB |
3052 | if (!err) { |
3053 | switch (cmd) { | |
3054 | case SIOCGIFFLAGS: | |
3055 | case SIOCGIFMETRIC: | |
3056 | case SIOCGIFMTU: | |
3057 | case SIOCGIFMEM: | |
3058 | case SIOCGIFHWADDR: | |
3059 | case SIOCGIFINDEX: | |
3060 | case SIOCGIFADDR: | |
3061 | case SIOCGIFBRDADDR: | |
3062 | case SIOCGIFDSTADDR: | |
3063 | case SIOCGIFNETMASK: | |
fab2532b | 3064 | case SIOCGIFPFLAGS: |
7a229387 | 3065 | case SIOCGIFTXQLEN: |
fab2532b AB |
3066 | case SIOCGMIIPHY: |
3067 | case SIOCGMIIREG: | |
a2116ed2 | 3068 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
3069 | err = -EFAULT; |
3070 | break; | |
3071 | } | |
3072 | } | |
3073 | return err; | |
3074 | } | |
3075 | ||
a2116ed2 AB |
3076 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3077 | struct compat_ifreq __user *uifr32) | |
3078 | { | |
3079 | struct ifreq ifr; | |
3080 | struct compat_ifmap __user *uifmap32; | |
3081 | mm_segment_t old_fs; | |
3082 | int err; | |
3083 | ||
3084 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3085 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3086 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3087 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3088 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3089 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3090 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3091 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3092 | if (err) |
3093 | return -EFAULT; | |
3094 | ||
3095 | old_fs = get_fs(); | |
c6d409cf | 3096 | set_fs(KERNEL_DS); |
c3f52ae6 | 3097 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3098 | set_fs(old_fs); |
a2116ed2 AB |
3099 | |
3100 | if (cmd == SIOCGIFMAP && !err) { | |
3101 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3102 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3103 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3104 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3105 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3106 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3107 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3108 | if (err) |
3109 | err = -EFAULT; | |
3110 | } | |
3111 | return err; | |
3112 | } | |
3113 | ||
7a229387 | 3114 | struct rtentry32 { |
c6d409cf | 3115 | u32 rt_pad1; |
7a229387 AB |
3116 | struct sockaddr rt_dst; /* target address */ |
3117 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3118 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3119 | unsigned short rt_flags; |
3120 | short rt_pad2; | |
3121 | u32 rt_pad3; | |
3122 | unsigned char rt_tos; | |
3123 | unsigned char rt_class; | |
3124 | short rt_pad4; | |
3125 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3126 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3127 | u32 rt_mtu; /* per route MTU/Window */ |
3128 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3129 | unsigned short rt_irtt; /* Initial RTT */ |
3130 | }; | |
3131 | ||
3132 | struct in6_rtmsg32 { | |
3133 | struct in6_addr rtmsg_dst; | |
3134 | struct in6_addr rtmsg_src; | |
3135 | struct in6_addr rtmsg_gateway; | |
3136 | u32 rtmsg_type; | |
3137 | u16 rtmsg_dst_len; | |
3138 | u16 rtmsg_src_len; | |
3139 | u32 rtmsg_metric; | |
3140 | u32 rtmsg_info; | |
3141 | u32 rtmsg_flags; | |
3142 | s32 rtmsg_ifindex; | |
3143 | }; | |
3144 | ||
6b96018b AB |
3145 | static int routing_ioctl(struct net *net, struct socket *sock, |
3146 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3147 | { |
3148 | int ret; | |
3149 | void *r = NULL; | |
3150 | struct in6_rtmsg r6; | |
3151 | struct rtentry r4; | |
3152 | char devname[16]; | |
3153 | u32 rtdev; | |
3154 | mm_segment_t old_fs = get_fs(); | |
3155 | ||
6b96018b AB |
3156 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3157 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3158 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3159 | 3 * sizeof(struct in6_addr)); |
3ddc5b46 MD |
3160 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3161 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3162 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3163 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3164 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3165 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3166 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3167 | |
3168 | r = (void *) &r6; | |
3169 | } else { /* ipv4 */ | |
6b96018b | 3170 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3171 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3172 | 3 * sizeof(struct sockaddr)); |
3ddc5b46 MD |
3173 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
3174 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3175 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3176 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); | |
3177 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3178 | ret |= get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3179 | if (rtdev) { |
c6d409cf | 3180 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3181 | r4.rt_dev = (char __user __force *)devname; |
3182 | devname[15] = 0; | |
7a229387 AB |
3183 | } else |
3184 | r4.rt_dev = NULL; | |
3185 | ||
3186 | r = (void *) &r4; | |
3187 | } | |
3188 | ||
3189 | if (ret) { | |
3190 | ret = -EFAULT; | |
3191 | goto out; | |
3192 | } | |
3193 | ||
c6d409cf | 3194 | set_fs(KERNEL_DS); |
6b96018b | 3195 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3196 | set_fs(old_fs); |
7a229387 AB |
3197 | |
3198 | out: | |
7a229387 AB |
3199 | return ret; |
3200 | } | |
3201 | ||
3202 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3203 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3204 | * use compatible ioctls |
7a229387 | 3205 | */ |
6b96018b | 3206 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3207 | { |
6b96018b | 3208 | compat_ulong_t tmp; |
7a229387 | 3209 | |
6b96018b | 3210 | if (get_user(tmp, argp)) |
7a229387 AB |
3211 | return -EFAULT; |
3212 | if (tmp == BRCTL_GET_VERSION) | |
3213 | return BRCTL_VERSION + 1; | |
3214 | return -EINVAL; | |
3215 | } | |
3216 | ||
6b96018b AB |
3217 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3218 | unsigned int cmd, unsigned long arg) | |
3219 | { | |
3220 | void __user *argp = compat_ptr(arg); | |
3221 | struct sock *sk = sock->sk; | |
3222 | struct net *net = sock_net(sk); | |
7a229387 | 3223 | |
6b96018b | 3224 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693 | 3225 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3226 | |
3227 | switch (cmd) { | |
3228 | case SIOCSIFBR: | |
3229 | case SIOCGIFBR: | |
3230 | return old_bridge_ioctl(argp); | |
3231 | case SIOCGIFNAME: | |
3232 | return dev_ifname32(net, argp); | |
3233 | case SIOCGIFCONF: | |
3234 | return dev_ifconf(net, argp); | |
3235 | case SIOCETHTOOL: | |
3236 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3237 | case SIOCWANDEV: |
3238 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3239 | case SIOCGIFMAP: |
3240 | case SIOCSIFMAP: | |
3241 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3242 | case SIOCBONDENSLAVE: |
3243 | case SIOCBONDRELEASE: | |
3244 | case SIOCBONDSETHWADDR: | |
6b96018b AB |
3245 | case SIOCBONDCHANGEACTIVE: |
3246 | return bond_ioctl(net, cmd, argp); | |
3247 | case SIOCADDRT: | |
3248 | case SIOCDELRT: | |
3249 | return routing_ioctl(net, sock, cmd, argp); | |
3250 | case SIOCGSTAMP: | |
3251 | return do_siocgstamp(net, sock, cmd, argp); | |
3252 | case SIOCGSTAMPNS: | |
3253 | return do_siocgstampns(net, sock, cmd, argp); | |
590d4693 BH |
3254 | case SIOCBONDSLAVEINFOQUERY: |
3255 | case SIOCBONDINFOQUERY: | |
a2116ed2 | 3256 | case SIOCSHWTSTAMP: |
fd468c74 | 3257 | case SIOCGHWTSTAMP: |
590d4693 | 3258 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3259 | |
3260 | case FIOSETOWN: | |
3261 | case SIOCSPGRP: | |
3262 | case FIOGETOWN: | |
3263 | case SIOCGPGRP: | |
3264 | case SIOCBRADDBR: | |
3265 | case SIOCBRDELBR: | |
3266 | case SIOCGIFVLAN: | |
3267 | case SIOCSIFVLAN: | |
3268 | case SIOCADDDLCI: | |
3269 | case SIOCDELDLCI: | |
3270 | return sock_ioctl(file, cmd, arg); | |
3271 | ||
3272 | case SIOCGIFFLAGS: | |
3273 | case SIOCSIFFLAGS: | |
3274 | case SIOCGIFMETRIC: | |
3275 | case SIOCSIFMETRIC: | |
3276 | case SIOCGIFMTU: | |
3277 | case SIOCSIFMTU: | |
3278 | case SIOCGIFMEM: | |
3279 | case SIOCSIFMEM: | |
3280 | case SIOCGIFHWADDR: | |
3281 | case SIOCSIFHWADDR: | |
3282 | case SIOCADDMULTI: | |
3283 | case SIOCDELMULTI: | |
3284 | case SIOCGIFINDEX: | |
6b96018b AB |
3285 | case SIOCGIFADDR: |
3286 | case SIOCSIFADDR: | |
3287 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3288 | case SIOCDIFADDR: |
6b96018b AB |
3289 | case SIOCGIFBRDADDR: |
3290 | case SIOCSIFBRDADDR: | |
3291 | case SIOCGIFDSTADDR: | |
3292 | case SIOCSIFDSTADDR: | |
3293 | case SIOCGIFNETMASK: | |
3294 | case SIOCSIFNETMASK: | |
3295 | case SIOCSIFPFLAGS: | |
3296 | case SIOCGIFPFLAGS: | |
3297 | case SIOCGIFTXQLEN: | |
3298 | case SIOCSIFTXQLEN: | |
3299 | case SIOCBRADDIF: | |
3300 | case SIOCBRDELIF: | |
9177efd3 AB |
3301 | case SIOCSIFNAME: |
3302 | case SIOCGMIIPHY: | |
3303 | case SIOCGMIIREG: | |
3304 | case SIOCSMIIREG: | |
6b96018b | 3305 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3306 | |
6b96018b AB |
3307 | case SIOCSARP: |
3308 | case SIOCGARP: | |
3309 | case SIOCDARP: | |
6b96018b | 3310 | case SIOCATMARK: |
9177efd3 AB |
3311 | return sock_do_ioctl(net, sock, cmd, arg); |
3312 | } | |
3313 | ||
6b96018b AB |
3314 | return -ENOIOCTLCMD; |
3315 | } | |
7a229387 | 3316 | |
95c96174 | 3317 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3318 | unsigned long arg) |
89bbfc95 SP |
3319 | { |
3320 | struct socket *sock = file->private_data; | |
3321 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3322 | struct sock *sk; |
3323 | struct net *net; | |
3324 | ||
3325 | sk = sock->sk; | |
3326 | net = sock_net(sk); | |
89bbfc95 SP |
3327 | |
3328 | if (sock->ops->compat_ioctl) | |
3329 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3330 | ||
87de87d5 DM |
3331 | if (ret == -ENOIOCTLCMD && |
3332 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3333 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3334 | ||
6b96018b AB |
3335 | if (ret == -ENOIOCTLCMD) |
3336 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3337 | ||
89bbfc95 SP |
3338 | return ret; |
3339 | } | |
3340 | #endif | |
3341 | ||
ac5a488e SS |
3342 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3343 | { | |
3344 | return sock->ops->bind(sock, addr, addrlen); | |
3345 | } | |
c6d409cf | 3346 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3347 | |
3348 | int kernel_listen(struct socket *sock, int backlog) | |
3349 | { | |
3350 | return sock->ops->listen(sock, backlog); | |
3351 | } | |
c6d409cf | 3352 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3353 | |
3354 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3355 | { | |
3356 | struct sock *sk = sock->sk; | |
3357 | int err; | |
3358 | ||
3359 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3360 | newsock); | |
3361 | if (err < 0) | |
3362 | goto done; | |
3363 | ||
3364 | err = sock->ops->accept(sock, *newsock, flags); | |
3365 | if (err < 0) { | |
3366 | sock_release(*newsock); | |
fa8705b0 | 3367 | *newsock = NULL; |
ac5a488e SS |
3368 | goto done; |
3369 | } | |
3370 | ||
3371 | (*newsock)->ops = sock->ops; | |
1b08534e | 3372 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3373 | |
3374 | done: | |
3375 | return err; | |
3376 | } | |
c6d409cf | 3377 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3378 | |
3379 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3380 | int flags) |
ac5a488e SS |
3381 | { |
3382 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3383 | } | |
c6d409cf | 3384 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3385 | |
3386 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3387 | int *addrlen) | |
3388 | { | |
3389 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3390 | } | |
c6d409cf | 3391 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3392 | |
3393 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3394 | int *addrlen) | |
3395 | { | |
3396 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3397 | } | |
c6d409cf | 3398 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3399 | |
3400 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3401 | char *optval, int *optlen) | |
3402 | { | |
3403 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3404 | char __user *uoptval; |
3405 | int __user *uoptlen; | |
ac5a488e SS |
3406 | int err; |
3407 | ||
fb8621bb NK |
3408 | uoptval = (char __user __force *) optval; |
3409 | uoptlen = (int __user __force *) optlen; | |
3410 | ||
ac5a488e SS |
3411 | set_fs(KERNEL_DS); |
3412 | if (level == SOL_SOCKET) | |
fb8621bb | 3413 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3414 | else |
fb8621bb NK |
3415 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3416 | uoptlen); | |
ac5a488e SS |
3417 | set_fs(oldfs); |
3418 | return err; | |
3419 | } | |
c6d409cf | 3420 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3421 | |
3422 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3423 | char *optval, unsigned int optlen) |
ac5a488e SS |
3424 | { |
3425 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3426 | char __user *uoptval; |
ac5a488e SS |
3427 | int err; |
3428 | ||
fb8621bb NK |
3429 | uoptval = (char __user __force *) optval; |
3430 | ||
ac5a488e SS |
3431 | set_fs(KERNEL_DS); |
3432 | if (level == SOL_SOCKET) | |
fb8621bb | 3433 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3434 | else |
fb8621bb | 3435 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3436 | optlen); |
3437 | set_fs(oldfs); | |
3438 | return err; | |
3439 | } | |
c6d409cf | 3440 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3441 | |
3442 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3443 | size_t size, int flags) | |
3444 | { | |
3445 | if (sock->ops->sendpage) | |
3446 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3447 | ||
3448 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3449 | } | |
c6d409cf | 3450 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3451 | |
3452 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3453 | { | |
3454 | mm_segment_t oldfs = get_fs(); | |
3455 | int err; | |
3456 | ||
3457 | set_fs(KERNEL_DS); | |
3458 | err = sock->ops->ioctl(sock, cmd, arg); | |
3459 | set_fs(oldfs); | |
3460 | ||
3461 | return err; | |
3462 | } | |
c6d409cf | 3463 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3464 | |
91cf45f0 TM |
3465 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3466 | { | |
3467 | return sock->ops->shutdown(sock, how); | |
3468 | } | |
91cf45f0 | 3469 | EXPORT_SYMBOL(kernel_sock_shutdown); |