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