Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 | 72 | #include <linux/if_bridge.h> |
20380731 ACM |
73 | #include <linux/if_frad.h> |
74 | #include <linux/if_vlan.h> | |
408eccce | 75 | #include <linux/ptp_classify.h> |
1da177e4 LT |
76 | #include <linux/init.h> |
77 | #include <linux/poll.h> | |
78 | #include <linux/cache.h> | |
79 | #include <linux/module.h> | |
80 | #include <linux/highmem.h> | |
1da177e4 LT |
81 | #include <linux/mount.h> |
82 | #include <linux/security.h> | |
83 | #include <linux/syscalls.h> | |
84 | #include <linux/compat.h> | |
85 | #include <linux/kmod.h> | |
3ec3b2fb | 86 | #include <linux/audit.h> |
d86b5e0e | 87 | #include <linux/wireless.h> |
1b8d7ae4 | 88 | #include <linux/nsproxy.h> |
1fd7317d | 89 | #include <linux/magic.h> |
5a0e3ad6 | 90 | #include <linux/slab.h> |
600e1779 | 91 | #include <linux/xattr.h> |
1da177e4 LT |
92 | |
93 | #include <asm/uaccess.h> | |
94 | #include <asm/unistd.h> | |
95 | ||
96 | #include <net/compat.h> | |
87de87d5 | 97 | #include <net/wext.h> |
f8451725 | 98 | #include <net/cls_cgroup.h> |
1da177e4 LT |
99 | |
100 | #include <net/sock.h> | |
101 | #include <linux/netfilter.h> | |
102 | ||
6b96018b AB |
103 | #include <linux/if_tun.h> |
104 | #include <linux/ipv6_route.h> | |
105 | #include <linux/route.h> | |
6b96018b AB |
106 | #include <linux/sockios.h> |
107 | #include <linux/atalk.h> | |
076bb0c8 | 108 | #include <net/busy_poll.h> |
f24b9be5 | 109 | #include <linux/errqueue.h> |
06021292 | 110 | |
e0d1095a | 111 | #ifdef CONFIG_NET_RX_BUSY_POLL |
64b0dc51 ET |
112 | unsigned int sysctl_net_busy_read __read_mostly; |
113 | unsigned int sysctl_net_busy_poll __read_mostly; | |
06021292 | 114 | #endif |
6b96018b | 115 | |
8ae5e030 AV |
116 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to); |
117 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from); | |
89bddce5 | 118 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
119 | |
120 | static int sock_close(struct inode *inode, struct file *file); | |
121 | static unsigned int sock_poll(struct file *file, | |
122 | struct poll_table_struct *wait); | |
89bddce5 | 123 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
124 | #ifdef CONFIG_COMPAT |
125 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 126 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 127 | #endif |
1da177e4 | 128 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
129 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
130 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 131 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 132 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 133 | unsigned int flags); |
1da177e4 | 134 | |
1da177e4 LT |
135 | /* |
136 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
137 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
138 | */ | |
139 | ||
da7071d7 | 140 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
141 | .owner = THIS_MODULE, |
142 | .llseek = no_llseek, | |
8ae5e030 AV |
143 | .read = new_sync_read, |
144 | .write = new_sync_write, | |
145 | .read_iter = sock_read_iter, | |
146 | .write_iter = sock_write_iter, | |
1da177e4 LT |
147 | .poll = sock_poll, |
148 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
149 | #ifdef CONFIG_COMPAT |
150 | .compat_ioctl = compat_sock_ioctl, | |
151 | #endif | |
1da177e4 | 152 | .mmap = sock_mmap, |
1da177e4 LT |
153 | .release = sock_close, |
154 | .fasync = sock_fasync, | |
5274f052 JA |
155 | .sendpage = sock_sendpage, |
156 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 157 | .splice_read = sock_splice_read, |
1da177e4 LT |
158 | }; |
159 | ||
160 | /* | |
161 | * The protocol list. Each protocol is registered in here. | |
162 | */ | |
163 | ||
1da177e4 | 164 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 165 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 166 | |
1da177e4 LT |
167 | /* |
168 | * Statistics counters of the socket lists | |
169 | */ | |
170 | ||
c6d409cf | 171 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
172 | |
173 | /* | |
89bddce5 SH |
174 | * Support routines. |
175 | * Move socket addresses back and forth across the kernel/user | |
176 | * divide and look after the messy bits. | |
1da177e4 LT |
177 | */ |
178 | ||
1da177e4 LT |
179 | /** |
180 | * move_addr_to_kernel - copy a socket address into kernel space | |
181 | * @uaddr: Address in user space | |
182 | * @kaddr: Address in kernel space | |
183 | * @ulen: Length in user space | |
184 | * | |
185 | * The address is copied into kernel space. If the provided address is | |
186 | * too long an error code of -EINVAL is returned. If the copy gives | |
187 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
188 | */ | |
189 | ||
43db362d | 190 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 191 | { |
230b1839 | 192 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 193 | return -EINVAL; |
89bddce5 | 194 | if (ulen == 0) |
1da177e4 | 195 | return 0; |
89bddce5 | 196 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 197 | return -EFAULT; |
3ec3b2fb | 198 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
199 | } |
200 | ||
201 | /** | |
202 | * move_addr_to_user - copy an address to user space | |
203 | * @kaddr: kernel space address | |
204 | * @klen: length of address in kernel | |
205 | * @uaddr: user space address | |
206 | * @ulen: pointer to user length field | |
207 | * | |
208 | * The value pointed to by ulen on entry is the buffer length available. | |
209 | * This is overwritten with the buffer space used. -EINVAL is returned | |
210 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
211 | * is returned if either the buffer or the length field are not | |
212 | * accessible. | |
213 | * After copying the data up to the limit the user specifies, the true | |
214 | * length of the data is written over the length limit the user | |
215 | * specified. Zero is returned for a success. | |
216 | */ | |
89bddce5 | 217 | |
43db362d | 218 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 219 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
220 | { |
221 | int err; | |
222 | int len; | |
223 | ||
68c6beb3 | 224 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
89bddce5 SH |
225 | err = get_user(len, ulen); |
226 | if (err) | |
1da177e4 | 227 | return err; |
89bddce5 SH |
228 | if (len > klen) |
229 | len = klen; | |
68c6beb3 | 230 | if (len < 0) |
1da177e4 | 231 | return -EINVAL; |
89bddce5 | 232 | if (len) { |
d6fe3945 SG |
233 | if (audit_sockaddr(klen, kaddr)) |
234 | return -ENOMEM; | |
89bddce5 | 235 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
236 | return -EFAULT; |
237 | } | |
238 | /* | |
89bddce5 SH |
239 | * "fromlen shall refer to the value before truncation.." |
240 | * 1003.1g | |
1da177e4 LT |
241 | */ |
242 | return __put_user(klen, ulen); | |
243 | } | |
244 | ||
e18b890b | 245 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
246 | |
247 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
248 | { | |
249 | struct socket_alloc *ei; | |
eaefd110 | 250 | struct socket_wq *wq; |
89bddce5 | 251 | |
e94b1766 | 252 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
253 | if (!ei) |
254 | return NULL; | |
eaefd110 ED |
255 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
256 | if (!wq) { | |
43815482 ED |
257 | kmem_cache_free(sock_inode_cachep, ei); |
258 | return NULL; | |
259 | } | |
eaefd110 ED |
260 | init_waitqueue_head(&wq->wait); |
261 | wq->fasync_list = NULL; | |
262 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 263 | |
1da177e4 LT |
264 | ei->socket.state = SS_UNCONNECTED; |
265 | ei->socket.flags = 0; | |
266 | ei->socket.ops = NULL; | |
267 | ei->socket.sk = NULL; | |
268 | ei->socket.file = NULL; | |
1da177e4 LT |
269 | |
270 | return &ei->vfs_inode; | |
271 | } | |
272 | ||
273 | static void sock_destroy_inode(struct inode *inode) | |
274 | { | |
43815482 | 275 | struct socket_alloc *ei; |
eaefd110 | 276 | struct socket_wq *wq; |
43815482 ED |
277 | |
278 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 279 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 280 | kfree_rcu(wq, rcu); |
43815482 | 281 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
282 | } |
283 | ||
51cc5068 | 284 | static void init_once(void *foo) |
1da177e4 | 285 | { |
89bddce5 | 286 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 287 | |
a35afb83 | 288 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 289 | } |
89bddce5 | 290 | |
1da177e4 LT |
291 | static int init_inodecache(void) |
292 | { | |
293 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
294 | sizeof(struct socket_alloc), |
295 | 0, | |
296 | (SLAB_HWCACHE_ALIGN | | |
297 | SLAB_RECLAIM_ACCOUNT | | |
298 | SLAB_MEM_SPREAD), | |
20c2df83 | 299 | init_once); |
1da177e4 LT |
300 | if (sock_inode_cachep == NULL) |
301 | return -ENOMEM; | |
302 | return 0; | |
303 | } | |
304 | ||
b87221de | 305 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
306 | .alloc_inode = sock_alloc_inode, |
307 | .destroy_inode = sock_destroy_inode, | |
308 | .statfs = simple_statfs, | |
1da177e4 LT |
309 | }; |
310 | ||
c23fbb6b ED |
311 | /* |
312 | * sockfs_dname() is called from d_path(). | |
313 | */ | |
314 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
315 | { | |
316 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
317 | dentry->d_inode->i_ino); | |
318 | } | |
319 | ||
3ba13d17 | 320 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 321 | .d_dname = sockfs_dname, |
1da177e4 LT |
322 | }; |
323 | ||
c74a1cbb AV |
324 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
325 | int flags, const char *dev_name, void *data) | |
326 | { | |
327 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
328 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
329 | } | |
330 | ||
331 | static struct vfsmount *sock_mnt __read_mostly; | |
332 | ||
333 | static struct file_system_type sock_fs_type = { | |
334 | .name = "sockfs", | |
335 | .mount = sockfs_mount, | |
336 | .kill_sb = kill_anon_super, | |
337 | }; | |
338 | ||
1da177e4 LT |
339 | /* |
340 | * Obtains the first available file descriptor and sets it up for use. | |
341 | * | |
39d8c1b6 DM |
342 | * These functions create file structures and maps them to fd space |
343 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
344 | * and file struct implicitly stored in sock->file. |
345 | * Note that another thread may close file descriptor before we return | |
346 | * from this function. We use the fact that now we do not refer | |
347 | * to socket after mapping. If one day we will need it, this | |
348 | * function will increment ref. count on file by 1. | |
349 | * | |
350 | * In any case returned fd MAY BE not valid! | |
351 | * This race condition is unavoidable | |
352 | * with shared fd spaces, we cannot solve it inside kernel, | |
353 | * but we take care of internal coherence yet. | |
354 | */ | |
355 | ||
aab174f0 | 356 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 357 | { |
7cbe66b6 | 358 | struct qstr name = { .name = "" }; |
2c48b9c4 | 359 | struct path path; |
7cbe66b6 | 360 | struct file *file; |
1da177e4 | 361 | |
600e1779 MY |
362 | if (dname) { |
363 | name.name = dname; | |
364 | name.len = strlen(name.name); | |
365 | } else if (sock->sk) { | |
366 | name.name = sock->sk->sk_prot_creator->name; | |
367 | name.len = strlen(name.name); | |
368 | } | |
4b936885 | 369 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
370 | if (unlikely(!path.dentry)) |
371 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 372 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 373 | |
2c48b9c4 | 374 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
39d8c1b6 | 375 | |
2c48b9c4 | 376 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 377 | &socket_file_ops); |
39b65252 | 378 | if (unlikely(IS_ERR(file))) { |
cc3808f8 | 379 | /* drop dentry, keep inode */ |
7de9c6ee | 380 | ihold(path.dentry->d_inode); |
2c48b9c4 | 381 | path_put(&path); |
39b65252 | 382 | return file; |
cc3808f8 AV |
383 | } |
384 | ||
385 | sock->file = file; | |
77d27200 | 386 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 387 | file->private_data = sock; |
28407630 | 388 | return file; |
39d8c1b6 | 389 | } |
56b31d1c | 390 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 391 | |
56b31d1c | 392 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
393 | { |
394 | struct file *newfile; | |
28407630 AV |
395 | int fd = get_unused_fd_flags(flags); |
396 | if (unlikely(fd < 0)) | |
397 | return fd; | |
39d8c1b6 | 398 | |
aab174f0 | 399 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 400 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 401 | fd_install(fd, newfile); |
28407630 AV |
402 | return fd; |
403 | } | |
7cbe66b6 | 404 | |
28407630 AV |
405 | put_unused_fd(fd); |
406 | return PTR_ERR(newfile); | |
1da177e4 LT |
407 | } |
408 | ||
406a3c63 | 409 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 410 | { |
6cb153ca BL |
411 | if (file->f_op == &socket_file_ops) |
412 | return file->private_data; /* set in sock_map_fd */ | |
413 | ||
23bb80d2 ED |
414 | *err = -ENOTSOCK; |
415 | return NULL; | |
6cb153ca | 416 | } |
406a3c63 | 417 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 418 | |
1da177e4 | 419 | /** |
c6d409cf | 420 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
421 | * @fd: file handle |
422 | * @err: pointer to an error code return | |
423 | * | |
424 | * The file handle passed in is locked and the socket it is bound | |
425 | * too is returned. If an error occurs the err pointer is overwritten | |
426 | * with a negative errno code and NULL is returned. The function checks | |
427 | * for both invalid handles and passing a handle which is not a socket. | |
428 | * | |
429 | * On a success the socket object pointer is returned. | |
430 | */ | |
431 | ||
432 | struct socket *sockfd_lookup(int fd, int *err) | |
433 | { | |
434 | struct file *file; | |
1da177e4 LT |
435 | struct socket *sock; |
436 | ||
89bddce5 SH |
437 | file = fget(fd); |
438 | if (!file) { | |
1da177e4 LT |
439 | *err = -EBADF; |
440 | return NULL; | |
441 | } | |
89bddce5 | 442 | |
6cb153ca BL |
443 | sock = sock_from_file(file, err); |
444 | if (!sock) | |
1da177e4 | 445 | fput(file); |
6cb153ca BL |
446 | return sock; |
447 | } | |
c6d409cf | 448 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 449 | |
6cb153ca BL |
450 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
451 | { | |
00e188ef | 452 | struct fd f = fdget(fd); |
6cb153ca BL |
453 | struct socket *sock; |
454 | ||
3672558c | 455 | *err = -EBADF; |
00e188ef AV |
456 | if (f.file) { |
457 | sock = sock_from_file(f.file, err); | |
458 | if (likely(sock)) { | |
459 | *fput_needed = f.flags; | |
6cb153ca | 460 | return sock; |
00e188ef AV |
461 | } |
462 | fdput(f); | |
1da177e4 | 463 | } |
6cb153ca | 464 | return NULL; |
1da177e4 LT |
465 | } |
466 | ||
600e1779 MY |
467 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
468 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
469 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
470 | static ssize_t sockfs_getxattr(struct dentry *dentry, | |
471 | const char *name, void *value, size_t size) | |
472 | { | |
473 | const char *proto_name; | |
474 | size_t proto_size; | |
475 | int error; | |
476 | ||
477 | error = -ENODATA; | |
478 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { | |
479 | proto_name = dentry->d_name.name; | |
480 | proto_size = strlen(proto_name); | |
481 | ||
482 | if (value) { | |
483 | error = -ERANGE; | |
484 | if (proto_size + 1 > size) | |
485 | goto out; | |
486 | ||
487 | strncpy(value, proto_name, proto_size + 1); | |
488 | } | |
489 | error = proto_size + 1; | |
490 | } | |
491 | ||
492 | out: | |
493 | return error; | |
494 | } | |
495 | ||
496 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, | |
497 | size_t size) | |
498 | { | |
499 | ssize_t len; | |
500 | ssize_t used = 0; | |
501 | ||
502 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); | |
503 | if (len < 0) | |
504 | return len; | |
505 | used += len; | |
506 | if (buffer) { | |
507 | if (size < used) | |
508 | return -ERANGE; | |
509 | buffer += len; | |
510 | } | |
511 | ||
512 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
513 | used += len; | |
514 | if (buffer) { | |
515 | if (size < used) | |
516 | return -ERANGE; | |
517 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
518 | buffer += len; | |
519 | } | |
520 | ||
521 | return used; | |
522 | } | |
523 | ||
524 | static const struct inode_operations sockfs_inode_ops = { | |
525 | .getxattr = sockfs_getxattr, | |
526 | .listxattr = sockfs_listxattr, | |
527 | }; | |
528 | ||
1da177e4 LT |
529 | /** |
530 | * sock_alloc - allocate a socket | |
89bddce5 | 531 | * |
1da177e4 LT |
532 | * Allocate a new inode and socket object. The two are bound together |
533 | * and initialised. The socket is then returned. If we are out of inodes | |
534 | * NULL is returned. | |
535 | */ | |
536 | ||
537 | static struct socket *sock_alloc(void) | |
538 | { | |
89bddce5 SH |
539 | struct inode *inode; |
540 | struct socket *sock; | |
1da177e4 | 541 | |
a209dfc7 | 542 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
543 | if (!inode) |
544 | return NULL; | |
545 | ||
546 | sock = SOCKET_I(inode); | |
547 | ||
29a020d3 | 548 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 549 | inode->i_ino = get_next_ino(); |
89bddce5 | 550 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
551 | inode->i_uid = current_fsuid(); |
552 | inode->i_gid = current_fsgid(); | |
600e1779 | 553 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 554 | |
19e8d69c | 555 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
556 | return sock; |
557 | } | |
558 | ||
1da177e4 LT |
559 | /** |
560 | * sock_release - close a socket | |
561 | * @sock: socket to close | |
562 | * | |
563 | * The socket is released from the protocol stack if it has a release | |
564 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 565 | * an inode not a file. |
1da177e4 | 566 | */ |
89bddce5 | 567 | |
1da177e4 LT |
568 | void sock_release(struct socket *sock) |
569 | { | |
570 | if (sock->ops) { | |
571 | struct module *owner = sock->ops->owner; | |
572 | ||
573 | sock->ops->release(sock); | |
574 | sock->ops = NULL; | |
575 | module_put(owner); | |
576 | } | |
577 | ||
eaefd110 | 578 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
3410f22e | 579 | pr_err("%s: fasync list not empty!\n", __func__); |
1da177e4 | 580 | |
b09e786b MP |
581 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
582 | return; | |
583 | ||
19e8d69c | 584 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
585 | if (!sock->file) { |
586 | iput(SOCK_INODE(sock)); | |
587 | return; | |
588 | } | |
89bddce5 | 589 | sock->file = NULL; |
1da177e4 | 590 | } |
c6d409cf | 591 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 592 | |
67cc0d40 | 593 | void __sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags) |
20d49473 | 594 | { |
140c55d4 ED |
595 | u8 flags = *tx_flags; |
596 | ||
b9f40e21 | 597 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
140c55d4 ED |
598 | flags |= SKBTX_HW_TSTAMP; |
599 | ||
b9f40e21 | 600 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
140c55d4 ED |
601 | flags |= SKBTX_SW_TSTAMP; |
602 | ||
e7fd2885 | 603 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED) |
140c55d4 ED |
604 | flags |= SKBTX_SCHED_TSTAMP; |
605 | ||
e1c8a607 | 606 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK) |
140c55d4 | 607 | flags |= SKBTX_ACK_TSTAMP; |
e7fd2885 | 608 | |
140c55d4 | 609 | *tx_flags = flags; |
20d49473 | 610 | } |
67cc0d40 | 611 | EXPORT_SYMBOL(__sock_tx_timestamp); |
20d49473 | 612 | |
1b784140 YX |
613 | static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, |
614 | size_t size) | |
1da177e4 | 615 | { |
1b784140 | 616 | return sock->ops->sendmsg(sock, msg, size); |
1da177e4 LT |
617 | } |
618 | ||
1b784140 | 619 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
620 | { |
621 | int err = security_socket_sendmsg(sock, msg, size); | |
622 | ||
1b784140 | 623 | return err ?: sock_sendmsg_nosec(sock, msg, size); |
0cf00c6f | 624 | } |
c6d409cf | 625 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 LT |
626 | |
627 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
628 | struct kvec *vec, size_t num, size_t size) | |
629 | { | |
630 | mm_segment_t oldfs = get_fs(); | |
631 | int result; | |
632 | ||
633 | set_fs(KERNEL_DS); | |
634 | /* | |
635 | * the following is safe, since for compiler definitions of kvec and | |
636 | * iovec are identical, yielding the same in-core layout and alignment | |
637 | */ | |
c0371da6 | 638 | iov_iter_init(&msg->msg_iter, WRITE, (struct iovec *)vec, num, size); |
1da177e4 LT |
639 | result = sock_sendmsg(sock, msg, size); |
640 | set_fs(oldfs); | |
641 | return result; | |
642 | } | |
c6d409cf | 643 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 644 | |
92f37fd2 ED |
645 | /* |
646 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
647 | */ | |
648 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
649 | struct sk_buff *skb) | |
650 | { | |
20d49473 | 651 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
f24b9be5 | 652 | struct scm_timestamping tss; |
20d49473 PO |
653 | int empty = 1; |
654 | struct skb_shared_hwtstamps *shhwtstamps = | |
655 | skb_hwtstamps(skb); | |
656 | ||
657 | /* Race occurred between timestamp enabling and packet | |
658 | receiving. Fill in the current time for now. */ | |
659 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
660 | __net_timestamp(skb); | |
661 | ||
662 | if (need_software_tstamp) { | |
663 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
664 | struct timeval tv; | |
665 | skb_get_timestamp(skb, &tv); | |
666 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
667 | sizeof(tv), &tv); | |
668 | } else { | |
f24b9be5 WB |
669 | struct timespec ts; |
670 | skb_get_timestampns(skb, &ts); | |
20d49473 | 671 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
f24b9be5 | 672 | sizeof(ts), &ts); |
20d49473 PO |
673 | } |
674 | } | |
675 | ||
f24b9be5 | 676 | memset(&tss, 0, sizeof(tss)); |
c199105d | 677 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
f24b9be5 | 678 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
20d49473 | 679 | empty = 0; |
4d276eb6 | 680 | if (shhwtstamps && |
b9f40e21 | 681 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
f24b9be5 | 682 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) |
4d276eb6 | 683 | empty = 0; |
20d49473 PO |
684 | if (!empty) |
685 | put_cmsg(msg, SOL_SOCKET, | |
f24b9be5 | 686 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
92f37fd2 | 687 | } |
7c81fd8b ACM |
688 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
689 | ||
6e3e939f JB |
690 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
691 | struct sk_buff *skb) | |
692 | { | |
693 | int ack; | |
694 | ||
695 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
696 | return; | |
697 | if (!skb->wifi_acked_valid) | |
698 | return; | |
699 | ||
700 | ack = skb->wifi_acked; | |
701 | ||
702 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
703 | } | |
704 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
705 | ||
11165f14 | 706 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
707 | struct sk_buff *skb) | |
3b885787 | 708 | { |
744d5a3e | 709 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount) |
3b885787 | 710 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
744d5a3e | 711 | sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
3b885787 NH |
712 | } |
713 | ||
767dd033 | 714 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
715 | struct sk_buff *skb) |
716 | { | |
717 | sock_recv_timestamp(msg, sk, skb); | |
718 | sock_recv_drops(msg, sk, skb); | |
719 | } | |
767dd033 | 720 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 721 | |
1b784140 YX |
722 | static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
723 | size_t size, int flags) | |
1da177e4 | 724 | { |
1b784140 | 725 | return sock->ops->recvmsg(sock, msg, size, flags); |
1da177e4 LT |
726 | } |
727 | ||
1b784140 YX |
728 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
729 | int flags) | |
a2e27255 ACM |
730 | { |
731 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
732 | ||
1b784140 | 733 | return err ?: sock_recvmsg_nosec(sock, msg, size, flags); |
1da177e4 | 734 | } |
c6d409cf | 735 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 736 | |
c1249c0a ML |
737 | /** |
738 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
739 | * @sock: The socket to receive the message from | |
740 | * @msg: Received message | |
741 | * @vec: Input s/g array for message data | |
742 | * @num: Size of input s/g array | |
743 | * @size: Number of bytes to read | |
744 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
745 | * | |
746 | * On return the msg structure contains the scatter/gather array passed in the | |
747 | * vec argument. The array is modified so that it consists of the unfilled | |
748 | * portion of the original array. | |
749 | * | |
750 | * The returned value is the total number of bytes received, or an error. | |
751 | */ | |
89bddce5 SH |
752 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
753 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
754 | { |
755 | mm_segment_t oldfs = get_fs(); | |
756 | int result; | |
757 | ||
758 | set_fs(KERNEL_DS); | |
759 | /* | |
760 | * the following is safe, since for compiler definitions of kvec and | |
761 | * iovec are identical, yielding the same in-core layout and alignment | |
762 | */ | |
c0371da6 | 763 | iov_iter_init(&msg->msg_iter, READ, (struct iovec *)vec, num, size); |
1da177e4 LT |
764 | result = sock_recvmsg(sock, msg, size, flags); |
765 | set_fs(oldfs); | |
766 | return result; | |
767 | } | |
c6d409cf | 768 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 | 769 | |
ce1d4d3e CH |
770 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
771 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 772 | { |
1da177e4 LT |
773 | struct socket *sock; |
774 | int flags; | |
775 | ||
ce1d4d3e CH |
776 | sock = file->private_data; |
777 | ||
35f9c09f ED |
778 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
779 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
780 | flags |= more; | |
ce1d4d3e | 781 | |
e6949583 | 782 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 783 | } |
1da177e4 | 784 | |
9c55e01c | 785 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 786 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
787 | unsigned int flags) |
788 | { | |
789 | struct socket *sock = file->private_data; | |
790 | ||
997b37da RDC |
791 | if (unlikely(!sock->ops->splice_read)) |
792 | return -EINVAL; | |
793 | ||
9c55e01c JA |
794 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
795 | } | |
796 | ||
8ae5e030 | 797 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to) |
ce1d4d3e | 798 | { |
6d652330 AV |
799 | struct file *file = iocb->ki_filp; |
800 | struct socket *sock = file->private_data; | |
0345f931 | 801 | struct msghdr msg = {.msg_iter = *to, |
802 | .msg_iocb = iocb}; | |
8ae5e030 | 803 | ssize_t res; |
ce1d4d3e | 804 | |
8ae5e030 AV |
805 | if (file->f_flags & O_NONBLOCK) |
806 | msg.msg_flags = MSG_DONTWAIT; | |
807 | ||
808 | if (iocb->ki_pos != 0) | |
1da177e4 | 809 | return -ESPIPE; |
027445c3 | 810 | |
66ee59af | 811 | if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
1da177e4 LT |
812 | return 0; |
813 | ||
237dae88 | 814 | res = sock_recvmsg(sock, &msg, iov_iter_count(to), msg.msg_flags); |
8ae5e030 AV |
815 | *to = msg.msg_iter; |
816 | return res; | |
1da177e4 LT |
817 | } |
818 | ||
8ae5e030 | 819 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) |
ce1d4d3e | 820 | { |
6d652330 AV |
821 | struct file *file = iocb->ki_filp; |
822 | struct socket *sock = file->private_data; | |
0345f931 | 823 | struct msghdr msg = {.msg_iter = *from, |
824 | .msg_iocb = iocb}; | |
8ae5e030 | 825 | ssize_t res; |
1da177e4 | 826 | |
8ae5e030 | 827 | if (iocb->ki_pos != 0) |
ce1d4d3e | 828 | return -ESPIPE; |
027445c3 | 829 | |
8ae5e030 AV |
830 | if (file->f_flags & O_NONBLOCK) |
831 | msg.msg_flags = MSG_DONTWAIT; | |
832 | ||
6d652330 AV |
833 | if (sock->type == SOCK_SEQPACKET) |
834 | msg.msg_flags |= MSG_EOR; | |
835 | ||
237dae88 | 836 | res = sock_sendmsg(sock, &msg, iov_iter_count(from)); |
8ae5e030 AV |
837 | *from = msg.msg_iter; |
838 | return res; | |
1da177e4 LT |
839 | } |
840 | ||
1da177e4 LT |
841 | /* |
842 | * Atomic setting of ioctl hooks to avoid race | |
843 | * with module unload. | |
844 | */ | |
845 | ||
4a3e2f71 | 846 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 847 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 848 | |
881d966b | 849 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 850 | { |
4a3e2f71 | 851 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 852 | br_ioctl_hook = hook; |
4a3e2f71 | 853 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
854 | } |
855 | EXPORT_SYMBOL(brioctl_set); | |
856 | ||
4a3e2f71 | 857 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 858 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 859 | |
881d966b | 860 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 861 | { |
4a3e2f71 | 862 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 863 | vlan_ioctl_hook = hook; |
4a3e2f71 | 864 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
865 | } |
866 | EXPORT_SYMBOL(vlan_ioctl_set); | |
867 | ||
4a3e2f71 | 868 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 869 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 870 | |
89bddce5 | 871 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 872 | { |
4a3e2f71 | 873 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 874 | dlci_ioctl_hook = hook; |
4a3e2f71 | 875 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
876 | } |
877 | EXPORT_SYMBOL(dlci_ioctl_set); | |
878 | ||
6b96018b AB |
879 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
880 | unsigned int cmd, unsigned long arg) | |
881 | { | |
882 | int err; | |
883 | void __user *argp = (void __user *)arg; | |
884 | ||
885 | err = sock->ops->ioctl(sock, cmd, arg); | |
886 | ||
887 | /* | |
888 | * If this ioctl is unknown try to hand it down | |
889 | * to the NIC driver. | |
890 | */ | |
891 | if (err == -ENOIOCTLCMD) | |
892 | err = dev_ioctl(net, cmd, argp); | |
893 | ||
894 | return err; | |
895 | } | |
896 | ||
1da177e4 LT |
897 | /* |
898 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
899 | * what to do with it - that's up to the protocol still. | |
900 | */ | |
901 | ||
902 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
903 | { | |
904 | struct socket *sock; | |
881d966b | 905 | struct sock *sk; |
1da177e4 LT |
906 | void __user *argp = (void __user *)arg; |
907 | int pid, err; | |
881d966b | 908 | struct net *net; |
1da177e4 | 909 | |
b69aee04 | 910 | sock = file->private_data; |
881d966b | 911 | sk = sock->sk; |
3b1e0a65 | 912 | net = sock_net(sk); |
1da177e4 | 913 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 914 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 915 | } else |
3d23e349 | 916 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 917 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 918 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 919 | } else |
3d23e349 | 920 | #endif |
89bddce5 | 921 | switch (cmd) { |
1da177e4 LT |
922 | case FIOSETOWN: |
923 | case SIOCSPGRP: | |
924 | err = -EFAULT; | |
925 | if (get_user(pid, (int __user *)argp)) | |
926 | break; | |
e0b93edd JL |
927 | f_setown(sock->file, pid, 1); |
928 | err = 0; | |
1da177e4 LT |
929 | break; |
930 | case FIOGETOWN: | |
931 | case SIOCGPGRP: | |
609d7fa9 | 932 | err = put_user(f_getown(sock->file), |
89bddce5 | 933 | (int __user *)argp); |
1da177e4 LT |
934 | break; |
935 | case SIOCGIFBR: | |
936 | case SIOCSIFBR: | |
937 | case SIOCBRADDBR: | |
938 | case SIOCBRDELBR: | |
939 | err = -ENOPKG; | |
940 | if (!br_ioctl_hook) | |
941 | request_module("bridge"); | |
942 | ||
4a3e2f71 | 943 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 944 | if (br_ioctl_hook) |
881d966b | 945 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 946 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
947 | break; |
948 | case SIOCGIFVLAN: | |
949 | case SIOCSIFVLAN: | |
950 | err = -ENOPKG; | |
951 | if (!vlan_ioctl_hook) | |
952 | request_module("8021q"); | |
953 | ||
4a3e2f71 | 954 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 955 | if (vlan_ioctl_hook) |
881d966b | 956 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 957 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 958 | break; |
1da177e4 LT |
959 | case SIOCADDDLCI: |
960 | case SIOCDELDLCI: | |
961 | err = -ENOPKG; | |
962 | if (!dlci_ioctl_hook) | |
963 | request_module("dlci"); | |
964 | ||
7512cbf6 PE |
965 | mutex_lock(&dlci_ioctl_mutex); |
966 | if (dlci_ioctl_hook) | |
1da177e4 | 967 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 968 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
969 | break; |
970 | default: | |
6b96018b | 971 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 972 | break; |
89bddce5 | 973 | } |
1da177e4 LT |
974 | return err; |
975 | } | |
976 | ||
977 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
978 | { | |
979 | int err; | |
980 | struct socket *sock = NULL; | |
89bddce5 | 981 | |
1da177e4 LT |
982 | err = security_socket_create(family, type, protocol, 1); |
983 | if (err) | |
984 | goto out; | |
985 | ||
986 | sock = sock_alloc(); | |
987 | if (!sock) { | |
988 | err = -ENOMEM; | |
989 | goto out; | |
990 | } | |
991 | ||
1da177e4 | 992 | sock->type = type; |
7420ed23 VY |
993 | err = security_socket_post_create(sock, family, type, protocol, 1); |
994 | if (err) | |
995 | goto out_release; | |
996 | ||
1da177e4 LT |
997 | out: |
998 | *res = sock; | |
999 | return err; | |
7420ed23 VY |
1000 | out_release: |
1001 | sock_release(sock); | |
1002 | sock = NULL; | |
1003 | goto out; | |
1da177e4 | 1004 | } |
c6d409cf | 1005 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1006 | |
1007 | /* No kernel lock held - perfect */ | |
89bddce5 | 1008 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 | 1009 | { |
cbf55001 | 1010 | unsigned int busy_flag = 0; |
1da177e4 LT |
1011 | struct socket *sock; |
1012 | ||
1013 | /* | |
89bddce5 | 1014 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1015 | */ |
b69aee04 | 1016 | sock = file->private_data; |
2d48d67f | 1017 | |
cbf55001 | 1018 | if (sk_can_busy_loop(sock->sk)) { |
2d48d67f | 1019 | /* this socket can poll_ll so tell the system call */ |
cbf55001 | 1020 | busy_flag = POLL_BUSY_LOOP; |
2d48d67f ET |
1021 | |
1022 | /* once, only if requested by syscall */ | |
cbf55001 ET |
1023 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
1024 | sk_busy_loop(sock->sk, 1); | |
2d48d67f ET |
1025 | } |
1026 | ||
cbf55001 | 1027 | return busy_flag | sock->ops->poll(file, sock, wait); |
1da177e4 LT |
1028 | } |
1029 | ||
89bddce5 | 1030 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1031 | { |
b69aee04 | 1032 | struct socket *sock = file->private_data; |
1da177e4 LT |
1033 | |
1034 | return sock->ops->mmap(file, sock, vma); | |
1035 | } | |
1036 | ||
20380731 | 1037 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1038 | { |
1da177e4 LT |
1039 | sock_release(SOCKET_I(inode)); |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | /* | |
1044 | * Update the socket async list | |
1045 | * | |
1046 | * Fasync_list locking strategy. | |
1047 | * | |
1048 | * 1. fasync_list is modified only under process context socket lock | |
1049 | * i.e. under semaphore. | |
1050 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1051 | * or under socket lock |
1da177e4 LT |
1052 | */ |
1053 | ||
1054 | static int sock_fasync(int fd, struct file *filp, int on) | |
1055 | { | |
989a2979 ED |
1056 | struct socket *sock = filp->private_data; |
1057 | struct sock *sk = sock->sk; | |
eaefd110 | 1058 | struct socket_wq *wq; |
1da177e4 | 1059 | |
989a2979 | 1060 | if (sk == NULL) |
1da177e4 | 1061 | return -EINVAL; |
1da177e4 LT |
1062 | |
1063 | lock_sock(sk); | |
eaefd110 ED |
1064 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1065 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1066 | |
eaefd110 | 1067 | if (!wq->fasync_list) |
989a2979 ED |
1068 | sock_reset_flag(sk, SOCK_FASYNC); |
1069 | else | |
bcdce719 | 1070 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1071 | |
989a2979 | 1072 | release_sock(sk); |
1da177e4 LT |
1073 | return 0; |
1074 | } | |
1075 | ||
43815482 | 1076 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1077 | |
1078 | int sock_wake_async(struct socket *sock, int how, int band) | |
1079 | { | |
43815482 ED |
1080 | struct socket_wq *wq; |
1081 | ||
1082 | if (!sock) | |
1083 | return -1; | |
1084 | rcu_read_lock(); | |
1085 | wq = rcu_dereference(sock->wq); | |
1086 | if (!wq || !wq->fasync_list) { | |
1087 | rcu_read_unlock(); | |
1da177e4 | 1088 | return -1; |
43815482 | 1089 | } |
89bddce5 | 1090 | switch (how) { |
8d8ad9d7 | 1091 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1092 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1093 | break; | |
1094 | goto call_kill; | |
8d8ad9d7 | 1095 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1096 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1097 | break; | |
1098 | /* fall through */ | |
8d8ad9d7 | 1099 | case SOCK_WAKE_IO: |
89bddce5 | 1100 | call_kill: |
43815482 | 1101 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1102 | break; |
8d8ad9d7 | 1103 | case SOCK_WAKE_URG: |
43815482 | 1104 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1105 | } |
43815482 | 1106 | rcu_read_unlock(); |
1da177e4 LT |
1107 | return 0; |
1108 | } | |
c6d409cf | 1109 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1110 | |
721db93a | 1111 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1112 | struct socket **res, int kern) |
1da177e4 LT |
1113 | { |
1114 | int err; | |
1115 | struct socket *sock; | |
55737fda | 1116 | const struct net_proto_family *pf; |
1da177e4 LT |
1117 | |
1118 | /* | |
89bddce5 | 1119 | * Check protocol is in range |
1da177e4 LT |
1120 | */ |
1121 | if (family < 0 || family >= NPROTO) | |
1122 | return -EAFNOSUPPORT; | |
1123 | if (type < 0 || type >= SOCK_MAX) | |
1124 | return -EINVAL; | |
1125 | ||
1126 | /* Compatibility. | |
1127 | ||
1128 | This uglymoron is moved from INET layer to here to avoid | |
1129 | deadlock in module load. | |
1130 | */ | |
1131 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1132 | static int warned; |
1da177e4 LT |
1133 | if (!warned) { |
1134 | warned = 1; | |
3410f22e YY |
1135 | pr_info("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1136 | current->comm); | |
1da177e4 LT |
1137 | } |
1138 | family = PF_PACKET; | |
1139 | } | |
1140 | ||
1141 | err = security_socket_create(family, type, protocol, kern); | |
1142 | if (err) | |
1143 | return err; | |
89bddce5 | 1144 | |
55737fda SH |
1145 | /* |
1146 | * Allocate the socket and allow the family to set things up. if | |
1147 | * the protocol is 0, the family is instructed to select an appropriate | |
1148 | * default. | |
1149 | */ | |
1150 | sock = sock_alloc(); | |
1151 | if (!sock) { | |
e87cc472 | 1152 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1153 | return -ENFILE; /* Not exactly a match, but its the |
1154 | closest posix thing */ | |
1155 | } | |
1156 | ||
1157 | sock->type = type; | |
1158 | ||
95a5afca | 1159 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1160 | /* Attempt to load a protocol module if the find failed. |
1161 | * | |
1162 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1163 | * requested real, full-featured networking support upon configuration. |
1164 | * Otherwise module support will break! | |
1165 | */ | |
190683a9 | 1166 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1167 | request_module("net-pf-%d", family); |
1da177e4 LT |
1168 | #endif |
1169 | ||
55737fda SH |
1170 | rcu_read_lock(); |
1171 | pf = rcu_dereference(net_families[family]); | |
1172 | err = -EAFNOSUPPORT; | |
1173 | if (!pf) | |
1174 | goto out_release; | |
1da177e4 LT |
1175 | |
1176 | /* | |
1177 | * We will call the ->create function, that possibly is in a loadable | |
1178 | * module, so we have to bump that loadable module refcnt first. | |
1179 | */ | |
55737fda | 1180 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1181 | goto out_release; |
1182 | ||
55737fda SH |
1183 | /* Now protected by module ref count */ |
1184 | rcu_read_unlock(); | |
1185 | ||
3f378b68 | 1186 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1187 | if (err < 0) |
1da177e4 | 1188 | goto out_module_put; |
a79af59e | 1189 | |
1da177e4 LT |
1190 | /* |
1191 | * Now to bump the refcnt of the [loadable] module that owns this | |
1192 | * socket at sock_release time we decrement its refcnt. | |
1193 | */ | |
55737fda SH |
1194 | if (!try_module_get(sock->ops->owner)) |
1195 | goto out_module_busy; | |
1196 | ||
1da177e4 LT |
1197 | /* |
1198 | * Now that we're done with the ->create function, the [loadable] | |
1199 | * module can have its refcnt decremented | |
1200 | */ | |
55737fda | 1201 | module_put(pf->owner); |
7420ed23 VY |
1202 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1203 | if (err) | |
3b185525 | 1204 | goto out_sock_release; |
55737fda | 1205 | *res = sock; |
1da177e4 | 1206 | |
55737fda SH |
1207 | return 0; |
1208 | ||
1209 | out_module_busy: | |
1210 | err = -EAFNOSUPPORT; | |
1da177e4 | 1211 | out_module_put: |
55737fda SH |
1212 | sock->ops = NULL; |
1213 | module_put(pf->owner); | |
1214 | out_sock_release: | |
1da177e4 | 1215 | sock_release(sock); |
55737fda SH |
1216 | return err; |
1217 | ||
1218 | out_release: | |
1219 | rcu_read_unlock(); | |
1220 | goto out_sock_release; | |
1da177e4 | 1221 | } |
721db93a | 1222 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1223 | |
1224 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1225 | { | |
1b8d7ae4 | 1226 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1227 | } |
c6d409cf | 1228 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1229 | |
1230 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1231 | { | |
1b8d7ae4 | 1232 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1233 | } |
c6d409cf | 1234 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1235 | |
3e0fa65f | 1236 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1237 | { |
1238 | int retval; | |
1239 | struct socket *sock; | |
a677a039 UD |
1240 | int flags; |
1241 | ||
e38b36f3 UD |
1242 | /* Check the SOCK_* constants for consistency. */ |
1243 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1244 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1245 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1246 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1247 | ||
a677a039 | 1248 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1249 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1250 | return -EINVAL; |
1251 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1252 | |
aaca0bdc UD |
1253 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1254 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1255 | ||
1da177e4 LT |
1256 | retval = sock_create(family, type, protocol, &sock); |
1257 | if (retval < 0) | |
1258 | goto out; | |
1259 | ||
77d27200 | 1260 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1261 | if (retval < 0) |
1262 | goto out_release; | |
1263 | ||
1264 | out: | |
1265 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1266 | return retval; | |
1267 | ||
1268 | out_release: | |
1269 | sock_release(sock); | |
1270 | return retval; | |
1271 | } | |
1272 | ||
1273 | /* | |
1274 | * Create a pair of connected sockets. | |
1275 | */ | |
1276 | ||
3e0fa65f HC |
1277 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1278 | int __user *, usockvec) | |
1da177e4 LT |
1279 | { |
1280 | struct socket *sock1, *sock2; | |
1281 | int fd1, fd2, err; | |
db349509 | 1282 | struct file *newfile1, *newfile2; |
a677a039 UD |
1283 | int flags; |
1284 | ||
1285 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1286 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1287 | return -EINVAL; |
1288 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1289 | |
aaca0bdc UD |
1290 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1291 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1292 | ||
1da177e4 LT |
1293 | /* |
1294 | * Obtain the first socket and check if the underlying protocol | |
1295 | * supports the socketpair call. | |
1296 | */ | |
1297 | ||
1298 | err = sock_create(family, type, protocol, &sock1); | |
1299 | if (err < 0) | |
1300 | goto out; | |
1301 | ||
1302 | err = sock_create(family, type, protocol, &sock2); | |
1303 | if (err < 0) | |
1304 | goto out_release_1; | |
1305 | ||
1306 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1307 | if (err < 0) |
1da177e4 LT |
1308 | goto out_release_both; |
1309 | ||
28407630 | 1310 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1311 | if (unlikely(fd1 < 0)) { |
1312 | err = fd1; | |
db349509 | 1313 | goto out_release_both; |
bf3c23d1 | 1314 | } |
d73aa286 | 1315 | |
28407630 | 1316 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1317 | if (unlikely(fd2 < 0)) { |
1318 | err = fd2; | |
d73aa286 | 1319 | goto out_put_unused_1; |
28407630 AV |
1320 | } |
1321 | ||
aab174f0 | 1322 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
28407630 AV |
1323 | if (unlikely(IS_ERR(newfile1))) { |
1324 | err = PTR_ERR(newfile1); | |
d73aa286 | 1325 | goto out_put_unused_both; |
28407630 AV |
1326 | } |
1327 | ||
aab174f0 | 1328 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1329 | if (IS_ERR(newfile2)) { |
1330 | err = PTR_ERR(newfile2); | |
d73aa286 | 1331 | goto out_fput_1; |
db349509 AV |
1332 | } |
1333 | ||
d73aa286 YD |
1334 | err = put_user(fd1, &usockvec[0]); |
1335 | if (err) | |
1336 | goto out_fput_both; | |
1337 | ||
1338 | err = put_user(fd2, &usockvec[1]); | |
1339 | if (err) | |
1340 | goto out_fput_both; | |
1341 | ||
157cf649 | 1342 | audit_fd_pair(fd1, fd2); |
d73aa286 | 1343 | |
db349509 AV |
1344 | fd_install(fd1, newfile1); |
1345 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1346 | /* fd1 and fd2 may be already another descriptors. |
1347 | * Not kernel problem. | |
1348 | */ | |
1349 | ||
d73aa286 | 1350 | return 0; |
1da177e4 | 1351 | |
d73aa286 YD |
1352 | out_fput_both: |
1353 | fput(newfile2); | |
1354 | fput(newfile1); | |
1355 | put_unused_fd(fd2); | |
1356 | put_unused_fd(fd1); | |
1357 | goto out; | |
1358 | ||
1359 | out_fput_1: | |
1360 | fput(newfile1); | |
1361 | put_unused_fd(fd2); | |
1362 | put_unused_fd(fd1); | |
1363 | sock_release(sock2); | |
1364 | goto out; | |
1da177e4 | 1365 | |
d73aa286 YD |
1366 | out_put_unused_both: |
1367 | put_unused_fd(fd2); | |
1368 | out_put_unused_1: | |
1369 | put_unused_fd(fd1); | |
1da177e4 | 1370 | out_release_both: |
89bddce5 | 1371 | sock_release(sock2); |
1da177e4 | 1372 | out_release_1: |
89bddce5 | 1373 | sock_release(sock1); |
1da177e4 LT |
1374 | out: |
1375 | return err; | |
1376 | } | |
1377 | ||
1da177e4 LT |
1378 | /* |
1379 | * Bind a name to a socket. Nothing much to do here since it's | |
1380 | * the protocol's responsibility to handle the local address. | |
1381 | * | |
1382 | * We move the socket address to kernel space before we call | |
1383 | * the protocol layer (having also checked the address is ok). | |
1384 | */ | |
1385 | ||
20f37034 | 1386 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1387 | { |
1388 | struct socket *sock; | |
230b1839 | 1389 | struct sockaddr_storage address; |
6cb153ca | 1390 | int err, fput_needed; |
1da177e4 | 1391 | |
89bddce5 | 1392 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1393 | if (sock) { |
43db362d | 1394 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1395 | if (err >= 0) { |
1396 | err = security_socket_bind(sock, | |
230b1839 | 1397 | (struct sockaddr *)&address, |
89bddce5 | 1398 | addrlen); |
6cb153ca BL |
1399 | if (!err) |
1400 | err = sock->ops->bind(sock, | |
89bddce5 | 1401 | (struct sockaddr *) |
230b1839 | 1402 | &address, addrlen); |
1da177e4 | 1403 | } |
6cb153ca | 1404 | fput_light(sock->file, fput_needed); |
89bddce5 | 1405 | } |
1da177e4 LT |
1406 | return err; |
1407 | } | |
1408 | ||
1da177e4 LT |
1409 | /* |
1410 | * Perform a listen. Basically, we allow the protocol to do anything | |
1411 | * necessary for a listen, and if that works, we mark the socket as | |
1412 | * ready for listening. | |
1413 | */ | |
1414 | ||
3e0fa65f | 1415 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1416 | { |
1417 | struct socket *sock; | |
6cb153ca | 1418 | int err, fput_needed; |
b8e1f9b5 | 1419 | int somaxconn; |
89bddce5 SH |
1420 | |
1421 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1422 | if (sock) { | |
8efa6e93 | 1423 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1424 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1425 | backlog = somaxconn; |
1da177e4 LT |
1426 | |
1427 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1428 | if (!err) |
1429 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1430 | |
6cb153ca | 1431 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1432 | } |
1433 | return err; | |
1434 | } | |
1435 | ||
1da177e4 LT |
1436 | /* |
1437 | * For accept, we attempt to create a new socket, set up the link | |
1438 | * with the client, wake up the client, then return the new | |
1439 | * connected fd. We collect the address of the connector in kernel | |
1440 | * space and move it to user at the very end. This is unclean because | |
1441 | * we open the socket then return an error. | |
1442 | * | |
1443 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1444 | * status to recvmsg. We need to add that support in a way thats | |
1445 | * clean when we restucture accept also. | |
1446 | */ | |
1447 | ||
20f37034 HC |
1448 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1449 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1450 | { |
1451 | struct socket *sock, *newsock; | |
39d8c1b6 | 1452 | struct file *newfile; |
6cb153ca | 1453 | int err, len, newfd, fput_needed; |
230b1839 | 1454 | struct sockaddr_storage address; |
1da177e4 | 1455 | |
77d27200 | 1456 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1457 | return -EINVAL; |
1458 | ||
1459 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1460 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1461 | ||
6cb153ca | 1462 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1463 | if (!sock) |
1464 | goto out; | |
1465 | ||
1466 | err = -ENFILE; | |
c6d409cf ED |
1467 | newsock = sock_alloc(); |
1468 | if (!newsock) | |
1da177e4 LT |
1469 | goto out_put; |
1470 | ||
1471 | newsock->type = sock->type; | |
1472 | newsock->ops = sock->ops; | |
1473 | ||
1da177e4 LT |
1474 | /* |
1475 | * We don't need try_module_get here, as the listening socket (sock) | |
1476 | * has the protocol module (sock->ops->owner) held. | |
1477 | */ | |
1478 | __module_get(newsock->ops->owner); | |
1479 | ||
28407630 | 1480 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1481 | if (unlikely(newfd < 0)) { |
1482 | err = newfd; | |
9a1875e6 DM |
1483 | sock_release(newsock); |
1484 | goto out_put; | |
39d8c1b6 | 1485 | } |
aab174f0 | 1486 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
28407630 AV |
1487 | if (unlikely(IS_ERR(newfile))) { |
1488 | err = PTR_ERR(newfile); | |
1489 | put_unused_fd(newfd); | |
1490 | sock_release(newsock); | |
1491 | goto out_put; | |
1492 | } | |
39d8c1b6 | 1493 | |
a79af59e FF |
1494 | err = security_socket_accept(sock, newsock); |
1495 | if (err) | |
39d8c1b6 | 1496 | goto out_fd; |
a79af59e | 1497 | |
1da177e4 LT |
1498 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1499 | if (err < 0) | |
39d8c1b6 | 1500 | goto out_fd; |
1da177e4 LT |
1501 | |
1502 | if (upeer_sockaddr) { | |
230b1839 | 1503 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1504 | &len, 2) < 0) { |
1da177e4 | 1505 | err = -ECONNABORTED; |
39d8c1b6 | 1506 | goto out_fd; |
1da177e4 | 1507 | } |
43db362d | 1508 | err = move_addr_to_user(&address, |
230b1839 | 1509 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1510 | if (err < 0) |
39d8c1b6 | 1511 | goto out_fd; |
1da177e4 LT |
1512 | } |
1513 | ||
1514 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1515 | ||
39d8c1b6 DM |
1516 | fd_install(newfd, newfile); |
1517 | err = newfd; | |
1da177e4 | 1518 | |
1da177e4 | 1519 | out_put: |
6cb153ca | 1520 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1521 | out: |
1522 | return err; | |
39d8c1b6 | 1523 | out_fd: |
9606a216 | 1524 | fput(newfile); |
39d8c1b6 | 1525 | put_unused_fd(newfd); |
1da177e4 LT |
1526 | goto out_put; |
1527 | } | |
1528 | ||
20f37034 HC |
1529 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1530 | int __user *, upeer_addrlen) | |
aaca0bdc | 1531 | { |
de11defe | 1532 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1533 | } |
1534 | ||
1da177e4 LT |
1535 | /* |
1536 | * Attempt to connect to a socket with the server address. The address | |
1537 | * is in user space so we verify it is OK and move it to kernel space. | |
1538 | * | |
1539 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1540 | * break bindings | |
1541 | * | |
1542 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1543 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1544 | * include the -EINPROGRESS status for such sockets. | |
1545 | */ | |
1546 | ||
20f37034 HC |
1547 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1548 | int, addrlen) | |
1da177e4 LT |
1549 | { |
1550 | struct socket *sock; | |
230b1839 | 1551 | struct sockaddr_storage address; |
6cb153ca | 1552 | int err, fput_needed; |
1da177e4 | 1553 | |
6cb153ca | 1554 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1555 | if (!sock) |
1556 | goto out; | |
43db362d | 1557 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1558 | if (err < 0) |
1559 | goto out_put; | |
1560 | ||
89bddce5 | 1561 | err = |
230b1839 | 1562 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1563 | if (err) |
1564 | goto out_put; | |
1565 | ||
230b1839 | 1566 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1567 | sock->file->f_flags); |
1568 | out_put: | |
6cb153ca | 1569 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1570 | out: |
1571 | return err; | |
1572 | } | |
1573 | ||
1574 | /* | |
1575 | * Get the local address ('name') of a socket object. Move the obtained | |
1576 | * name to user space. | |
1577 | */ | |
1578 | ||
20f37034 HC |
1579 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1580 | int __user *, usockaddr_len) | |
1da177e4 LT |
1581 | { |
1582 | struct socket *sock; | |
230b1839 | 1583 | struct sockaddr_storage address; |
6cb153ca | 1584 | int len, err, fput_needed; |
89bddce5 | 1585 | |
6cb153ca | 1586 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1587 | if (!sock) |
1588 | goto out; | |
1589 | ||
1590 | err = security_socket_getsockname(sock); | |
1591 | if (err) | |
1592 | goto out_put; | |
1593 | ||
230b1839 | 1594 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1595 | if (err) |
1596 | goto out_put; | |
43db362d | 1597 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1598 | |
1599 | out_put: | |
6cb153ca | 1600 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1601 | out: |
1602 | return err; | |
1603 | } | |
1604 | ||
1605 | /* | |
1606 | * Get the remote address ('name') of a socket object. Move the obtained | |
1607 | * name to user space. | |
1608 | */ | |
1609 | ||
20f37034 HC |
1610 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1611 | int __user *, usockaddr_len) | |
1da177e4 LT |
1612 | { |
1613 | struct socket *sock; | |
230b1839 | 1614 | struct sockaddr_storage address; |
6cb153ca | 1615 | int len, err, fput_needed; |
1da177e4 | 1616 | |
89bddce5 SH |
1617 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1618 | if (sock != NULL) { | |
1da177e4 LT |
1619 | err = security_socket_getpeername(sock); |
1620 | if (err) { | |
6cb153ca | 1621 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1622 | return err; |
1623 | } | |
1624 | ||
89bddce5 | 1625 | err = |
230b1839 | 1626 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1627 | 1); |
1da177e4 | 1628 | if (!err) |
43db362d | 1629 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1630 | usockaddr_len); |
6cb153ca | 1631 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1632 | } |
1633 | return err; | |
1634 | } | |
1635 | ||
1636 | /* | |
1637 | * Send a datagram to a given address. We move the address into kernel | |
1638 | * space and check the user space data area is readable before invoking | |
1639 | * the protocol. | |
1640 | */ | |
1641 | ||
3e0fa65f | 1642 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1643 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1644 | int, addr_len) |
1da177e4 LT |
1645 | { |
1646 | struct socket *sock; | |
230b1839 | 1647 | struct sockaddr_storage address; |
1da177e4 LT |
1648 | int err; |
1649 | struct msghdr msg; | |
1650 | struct iovec iov; | |
6cb153ca | 1651 | int fput_needed; |
6cb153ca | 1652 | |
602bd0e9 AV |
1653 | err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter); |
1654 | if (unlikely(err)) | |
1655 | return err; | |
de0fa95c PE |
1656 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1657 | if (!sock) | |
4387ff75 | 1658 | goto out; |
6cb153ca | 1659 | |
89bddce5 | 1660 | msg.msg_name = NULL; |
89bddce5 SH |
1661 | msg.msg_control = NULL; |
1662 | msg.msg_controllen = 0; | |
1663 | msg.msg_namelen = 0; | |
6cb153ca | 1664 | if (addr) { |
43db362d | 1665 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1666 | if (err < 0) |
1667 | goto out_put; | |
230b1839 | 1668 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1669 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1670 | } |
1671 | if (sock->file->f_flags & O_NONBLOCK) | |
1672 | flags |= MSG_DONTWAIT; | |
1673 | msg.msg_flags = flags; | |
602bd0e9 | 1674 | err = sock_sendmsg(sock, &msg, iov_iter_count(&msg.msg_iter)); |
1da177e4 | 1675 | |
89bddce5 | 1676 | out_put: |
de0fa95c | 1677 | fput_light(sock->file, fput_needed); |
4387ff75 | 1678 | out: |
1da177e4 LT |
1679 | return err; |
1680 | } | |
1681 | ||
1682 | /* | |
89bddce5 | 1683 | * Send a datagram down a socket. |
1da177e4 LT |
1684 | */ |
1685 | ||
3e0fa65f | 1686 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1687 | unsigned int, flags) |
1da177e4 LT |
1688 | { |
1689 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1690 | } | |
1691 | ||
1692 | /* | |
89bddce5 | 1693 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1694 | * sender. We verify the buffers are writable and if needed move the |
1695 | * sender address from kernel to user space. | |
1696 | */ | |
1697 | ||
3e0fa65f | 1698 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1699 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1700 | int __user *, addr_len) |
1da177e4 LT |
1701 | { |
1702 | struct socket *sock; | |
1703 | struct iovec iov; | |
1704 | struct msghdr msg; | |
230b1839 | 1705 | struct sockaddr_storage address; |
89bddce5 | 1706 | int err, err2; |
6cb153ca BL |
1707 | int fput_needed; |
1708 | ||
602bd0e9 AV |
1709 | err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter); |
1710 | if (unlikely(err)) | |
1711 | return err; | |
de0fa95c | 1712 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1713 | if (!sock) |
de0fa95c | 1714 | goto out; |
1da177e4 | 1715 | |
89bddce5 SH |
1716 | msg.msg_control = NULL; |
1717 | msg.msg_controllen = 0; | |
f3d33426 HFS |
1718 | /* Save some cycles and don't copy the address if not needed */ |
1719 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1720 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1721 | msg.msg_namelen = 0; | |
1da177e4 LT |
1722 | if (sock->file->f_flags & O_NONBLOCK) |
1723 | flags |= MSG_DONTWAIT; | |
602bd0e9 | 1724 | err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags); |
1da177e4 | 1725 | |
89bddce5 | 1726 | if (err >= 0 && addr != NULL) { |
43db362d | 1727 | err2 = move_addr_to_user(&address, |
230b1839 | 1728 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1729 | if (err2 < 0) |
1730 | err = err2; | |
1da177e4 | 1731 | } |
de0fa95c PE |
1732 | |
1733 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1734 | out: |
1da177e4 LT |
1735 | return err; |
1736 | } | |
1737 | ||
1738 | /* | |
89bddce5 | 1739 | * Receive a datagram from a socket. |
1da177e4 LT |
1740 | */ |
1741 | ||
b7c0ddf5 JG |
1742 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
1743 | unsigned int, flags) | |
1da177e4 LT |
1744 | { |
1745 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1746 | } | |
1747 | ||
1748 | /* | |
1749 | * Set a socket option. Because we don't know the option lengths we have | |
1750 | * to pass the user mode parameter for the protocols to sort out. | |
1751 | */ | |
1752 | ||
20f37034 HC |
1753 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1754 | char __user *, optval, int, optlen) | |
1da177e4 | 1755 | { |
6cb153ca | 1756 | int err, fput_needed; |
1da177e4 LT |
1757 | struct socket *sock; |
1758 | ||
1759 | if (optlen < 0) | |
1760 | return -EINVAL; | |
89bddce5 SH |
1761 | |
1762 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1763 | if (sock != NULL) { | |
1764 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1765 | if (err) |
1766 | goto out_put; | |
1da177e4 LT |
1767 | |
1768 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1769 | err = |
1770 | sock_setsockopt(sock, level, optname, optval, | |
1771 | optlen); | |
1da177e4 | 1772 | else |
89bddce5 SH |
1773 | err = |
1774 | sock->ops->setsockopt(sock, level, optname, optval, | |
1775 | optlen); | |
6cb153ca BL |
1776 | out_put: |
1777 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1778 | } |
1779 | return err; | |
1780 | } | |
1781 | ||
1782 | /* | |
1783 | * Get a socket option. Because we don't know the option lengths we have | |
1784 | * to pass a user mode parameter for the protocols to sort out. | |
1785 | */ | |
1786 | ||
20f37034 HC |
1787 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1788 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1789 | { |
6cb153ca | 1790 | int err, fput_needed; |
1da177e4 LT |
1791 | struct socket *sock; |
1792 | ||
89bddce5 SH |
1793 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1794 | if (sock != NULL) { | |
6cb153ca BL |
1795 | err = security_socket_getsockopt(sock, level, optname); |
1796 | if (err) | |
1797 | goto out_put; | |
1da177e4 LT |
1798 | |
1799 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1800 | err = |
1801 | sock_getsockopt(sock, level, optname, optval, | |
1802 | optlen); | |
1da177e4 | 1803 | else |
89bddce5 SH |
1804 | err = |
1805 | sock->ops->getsockopt(sock, level, optname, optval, | |
1806 | optlen); | |
6cb153ca BL |
1807 | out_put: |
1808 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1809 | } |
1810 | return err; | |
1811 | } | |
1812 | ||
1da177e4 LT |
1813 | /* |
1814 | * Shutdown a socket. | |
1815 | */ | |
1816 | ||
754fe8d2 | 1817 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1818 | { |
6cb153ca | 1819 | int err, fput_needed; |
1da177e4 LT |
1820 | struct socket *sock; |
1821 | ||
89bddce5 SH |
1822 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1823 | if (sock != NULL) { | |
1da177e4 | 1824 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1825 | if (!err) |
1826 | err = sock->ops->shutdown(sock, how); | |
1827 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1828 | } |
1829 | return err; | |
1830 | } | |
1831 | ||
89bddce5 | 1832 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1833 | * fields which are the same type (int / unsigned) on our platforms. |
1834 | */ | |
1835 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1836 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1837 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1838 | ||
c71d8ebe TH |
1839 | struct used_address { |
1840 | struct sockaddr_storage name; | |
1841 | unsigned int name_len; | |
1842 | }; | |
1843 | ||
da184284 AV |
1844 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
1845 | struct user_msghdr __user *umsg, | |
1846 | struct sockaddr __user **save_addr, | |
1847 | struct iovec **iov) | |
1661bf36 | 1848 | { |
08adb7da AV |
1849 | struct sockaddr __user *uaddr; |
1850 | struct iovec __user *uiov; | |
c0371da6 | 1851 | size_t nr_segs; |
08adb7da AV |
1852 | ssize_t err; |
1853 | ||
1854 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || | |
1855 | __get_user(uaddr, &umsg->msg_name) || | |
1856 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || | |
1857 | __get_user(uiov, &umsg->msg_iov) || | |
c0371da6 | 1858 | __get_user(nr_segs, &umsg->msg_iovlen) || |
08adb7da AV |
1859 | __get_user(kmsg->msg_control, &umsg->msg_control) || |
1860 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || | |
1861 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) | |
1661bf36 | 1862 | return -EFAULT; |
dbb490b9 | 1863 | |
08adb7da | 1864 | if (!uaddr) |
6a2a2b3a AS |
1865 | kmsg->msg_namelen = 0; |
1866 | ||
dbb490b9 ML |
1867 | if (kmsg->msg_namelen < 0) |
1868 | return -EINVAL; | |
1869 | ||
1661bf36 | 1870 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 1871 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
08adb7da AV |
1872 | |
1873 | if (save_addr) | |
1874 | *save_addr = uaddr; | |
1875 | ||
1876 | if (uaddr && kmsg->msg_namelen) { | |
1877 | if (!save_addr) { | |
1878 | err = move_addr_to_kernel(uaddr, kmsg->msg_namelen, | |
1879 | kmsg->msg_name); | |
1880 | if (err < 0) | |
1881 | return err; | |
1882 | } | |
1883 | } else { | |
1884 | kmsg->msg_name = NULL; | |
1885 | kmsg->msg_namelen = 0; | |
1886 | } | |
1887 | ||
c0371da6 | 1888 | if (nr_segs > UIO_MAXIOV) |
08adb7da AV |
1889 | return -EMSGSIZE; |
1890 | ||
0345f931 | 1891 | kmsg->msg_iocb = NULL; |
1892 | ||
da184284 AV |
1893 | return import_iovec(save_addr ? READ : WRITE, uiov, nr_segs, |
1894 | UIO_FASTIOV, iov, &kmsg->msg_iter); | |
1661bf36 DC |
1895 | } |
1896 | ||
666547ff | 1897 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 1898 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1899 | struct used_address *used_address) |
1da177e4 | 1900 | { |
89bddce5 SH |
1901 | struct compat_msghdr __user *msg_compat = |
1902 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1903 | struct sockaddr_storage address; |
1da177e4 | 1904 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1905 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1906 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1907 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 1908 | unsigned char *ctl_buf = ctl; |
08adb7da AV |
1909 | int ctl_len, total_len; |
1910 | ssize_t err; | |
89bddce5 | 1911 | |
08adb7da | 1912 | msg_sys->msg_name = &address; |
1da177e4 | 1913 | |
08449320 | 1914 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 1915 | err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov); |
08449320 | 1916 | else |
08adb7da | 1917 | err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov); |
89bddce5 | 1918 | if (err < 0) |
da184284 AV |
1919 | return err; |
1920 | total_len = iov_iter_count(&msg_sys->msg_iter); | |
1da177e4 LT |
1921 | |
1922 | err = -ENOBUFS; | |
1923 | ||
228e548e | 1924 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 1925 | goto out_freeiov; |
228e548e | 1926 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 1927 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 1928 | err = |
228e548e | 1929 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 1930 | sizeof(ctl)); |
1da177e4 LT |
1931 | if (err) |
1932 | goto out_freeiov; | |
228e548e AB |
1933 | ctl_buf = msg_sys->msg_control; |
1934 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 1935 | } else if (ctl_len) { |
89bddce5 | 1936 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1937 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1938 | if (ctl_buf == NULL) |
1da177e4 LT |
1939 | goto out_freeiov; |
1940 | } | |
1941 | err = -EFAULT; | |
1942 | /* | |
228e548e | 1943 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
1944 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
1945 | * checking falls down on this. | |
1946 | */ | |
fb8621bb | 1947 | if (copy_from_user(ctl_buf, |
228e548e | 1948 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 1949 | ctl_len)) |
1da177e4 | 1950 | goto out_freectl; |
228e548e | 1951 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 1952 | } |
228e548e | 1953 | msg_sys->msg_flags = flags; |
1da177e4 LT |
1954 | |
1955 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 1956 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
1957 | /* |
1958 | * If this is sendmmsg() and current destination address is same as | |
1959 | * previously succeeded address, omit asking LSM's decision. | |
1960 | * used_address->name_len is initialized to UINT_MAX so that the first | |
1961 | * destination address never matches. | |
1962 | */ | |
bc909d9d MD |
1963 | if (used_address && msg_sys->msg_name && |
1964 | used_address->name_len == msg_sys->msg_namelen && | |
1965 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
1966 | used_address->name_len)) { |
1967 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
1968 | goto out_freectl; | |
1969 | } | |
1970 | err = sock_sendmsg(sock, msg_sys, total_len); | |
1971 | /* | |
1972 | * If this is sendmmsg() and sending to current destination address was | |
1973 | * successful, remember it. | |
1974 | */ | |
1975 | if (used_address && err >= 0) { | |
1976 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
1977 | if (msg_sys->msg_name) |
1978 | memcpy(&used_address->name, msg_sys->msg_name, | |
1979 | used_address->name_len); | |
c71d8ebe | 1980 | } |
1da177e4 LT |
1981 | |
1982 | out_freectl: | |
89bddce5 | 1983 | if (ctl_buf != ctl) |
1da177e4 LT |
1984 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
1985 | out_freeiov: | |
da184284 | 1986 | kfree(iov); |
228e548e AB |
1987 | return err; |
1988 | } | |
1989 | ||
1990 | /* | |
1991 | * BSD sendmsg interface | |
1992 | */ | |
1993 | ||
666547ff | 1994 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
228e548e AB |
1995 | { |
1996 | int fput_needed, err; | |
1997 | struct msghdr msg_sys; | |
1be374a0 AL |
1998 | struct socket *sock; |
1999 | ||
1be374a0 | 2000 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2001 | if (!sock) |
2002 | goto out; | |
2003 | ||
a7526eb5 | 2004 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2005 | |
6cb153ca | 2006 | fput_light(sock->file, fput_needed); |
89bddce5 | 2007 | out: |
1da177e4 LT |
2008 | return err; |
2009 | } | |
2010 | ||
666547ff | 2011 | SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
a7526eb5 AL |
2012 | { |
2013 | if (flags & MSG_CMSG_COMPAT) | |
2014 | return -EINVAL; | |
2015 | return __sys_sendmsg(fd, msg, flags); | |
2016 | } | |
2017 | ||
228e548e AB |
2018 | /* |
2019 | * Linux sendmmsg interface | |
2020 | */ | |
2021 | ||
2022 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2023 | unsigned int flags) | |
2024 | { | |
2025 | int fput_needed, err, datagrams; | |
2026 | struct socket *sock; | |
2027 | struct mmsghdr __user *entry; | |
2028 | struct compat_mmsghdr __user *compat_entry; | |
2029 | struct msghdr msg_sys; | |
c71d8ebe | 2030 | struct used_address used_address; |
228e548e | 2031 | |
98382f41 AB |
2032 | if (vlen > UIO_MAXIOV) |
2033 | vlen = UIO_MAXIOV; | |
228e548e AB |
2034 | |
2035 | datagrams = 0; | |
2036 | ||
2037 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2038 | if (!sock) | |
2039 | return err; | |
2040 | ||
c71d8ebe | 2041 | used_address.name_len = UINT_MAX; |
228e548e AB |
2042 | entry = mmsg; |
2043 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2044 | err = 0; |
228e548e AB |
2045 | |
2046 | while (datagrams < vlen) { | |
228e548e | 2047 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2048 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5 | 2049 | &msg_sys, flags, &used_address); |
228e548e AB |
2050 | if (err < 0) |
2051 | break; | |
2052 | err = __put_user(err, &compat_entry->msg_len); | |
2053 | ++compat_entry; | |
2054 | } else { | |
a7526eb5 | 2055 | err = ___sys_sendmsg(sock, |
666547ff | 2056 | (struct user_msghdr __user *)entry, |
a7526eb5 | 2057 | &msg_sys, flags, &used_address); |
228e548e AB |
2058 | if (err < 0) |
2059 | break; | |
2060 | err = put_user(err, &entry->msg_len); | |
2061 | ++entry; | |
2062 | } | |
2063 | ||
2064 | if (err) | |
2065 | break; | |
2066 | ++datagrams; | |
2067 | } | |
2068 | ||
228e548e AB |
2069 | fput_light(sock->file, fput_needed); |
2070 | ||
728ffb86 AB |
2071 | /* We only return an error if no datagrams were able to be sent */ |
2072 | if (datagrams != 0) | |
228e548e AB |
2073 | return datagrams; |
2074 | ||
228e548e AB |
2075 | return err; |
2076 | } | |
2077 | ||
2078 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2079 | unsigned int, vlen, unsigned int, flags) | |
2080 | { | |
1be374a0 AL |
2081 | if (flags & MSG_CMSG_COMPAT) |
2082 | return -EINVAL; | |
228e548e AB |
2083 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2084 | } | |
2085 | ||
666547ff | 2086 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 2087 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2088 | { |
89bddce5 SH |
2089 | struct compat_msghdr __user *msg_compat = |
2090 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2091 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2092 | struct iovec *iov = iovstack; |
1da177e4 | 2093 | unsigned long cmsg_ptr; |
08adb7da AV |
2094 | int total_len, len; |
2095 | ssize_t err; | |
1da177e4 LT |
2096 | |
2097 | /* kernel mode address */ | |
230b1839 | 2098 | struct sockaddr_storage addr; |
1da177e4 LT |
2099 | |
2100 | /* user mode address pointers */ | |
2101 | struct sockaddr __user *uaddr; | |
08adb7da | 2102 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
89bddce5 | 2103 | |
08adb7da | 2104 | msg_sys->msg_name = &addr; |
1da177e4 | 2105 | |
f3d33426 | 2106 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 2107 | err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov); |
f3d33426 | 2108 | else |
08adb7da | 2109 | err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov); |
1da177e4 | 2110 | if (err < 0) |
da184284 AV |
2111 | return err; |
2112 | total_len = iov_iter_count(&msg_sys->msg_iter); | |
1da177e4 | 2113 | |
a2e27255 ACM |
2114 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2115 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2116 | |
f3d33426 HFS |
2117 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2118 | msg_sys->msg_namelen = 0; | |
2119 | ||
1da177e4 LT |
2120 | if (sock->file->f_flags & O_NONBLOCK) |
2121 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2122 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2123 | total_len, flags); | |
1da177e4 LT |
2124 | if (err < 0) |
2125 | goto out_freeiov; | |
2126 | len = err; | |
2127 | ||
2128 | if (uaddr != NULL) { | |
43db362d | 2129 | err = move_addr_to_user(&addr, |
a2e27255 | 2130 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2131 | uaddr_len); |
1da177e4 LT |
2132 | if (err < 0) |
2133 | goto out_freeiov; | |
2134 | } | |
a2e27255 | 2135 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2136 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2137 | if (err) |
2138 | goto out_freeiov; | |
2139 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2140 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2141 | &msg_compat->msg_controllen); |
2142 | else | |
a2e27255 | 2143 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2144 | &msg->msg_controllen); |
2145 | if (err) | |
2146 | goto out_freeiov; | |
2147 | err = len; | |
2148 | ||
2149 | out_freeiov: | |
da184284 | 2150 | kfree(iov); |
a2e27255 ACM |
2151 | return err; |
2152 | } | |
2153 | ||
2154 | /* | |
2155 | * BSD recvmsg interface | |
2156 | */ | |
2157 | ||
666547ff | 2158 | long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2159 | { |
2160 | int fput_needed, err; | |
2161 | struct msghdr msg_sys; | |
1be374a0 AL |
2162 | struct socket *sock; |
2163 | ||
1be374a0 | 2164 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2165 | if (!sock) |
2166 | goto out; | |
2167 | ||
a7526eb5 | 2168 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2169 | |
6cb153ca | 2170 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2171 | out: |
2172 | return err; | |
2173 | } | |
2174 | ||
666547ff | 2175 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
a7526eb5 AL |
2176 | unsigned int, flags) |
2177 | { | |
2178 | if (flags & MSG_CMSG_COMPAT) | |
2179 | return -EINVAL; | |
2180 | return __sys_recvmsg(fd, msg, flags); | |
2181 | } | |
2182 | ||
a2e27255 ACM |
2183 | /* |
2184 | * Linux recvmmsg interface | |
2185 | */ | |
2186 | ||
2187 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2188 | unsigned int flags, struct timespec *timeout) | |
2189 | { | |
2190 | int fput_needed, err, datagrams; | |
2191 | struct socket *sock; | |
2192 | struct mmsghdr __user *entry; | |
d7256d0e | 2193 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2194 | struct msghdr msg_sys; |
2195 | struct timespec end_time; | |
2196 | ||
2197 | if (timeout && | |
2198 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2199 | timeout->tv_nsec)) | |
2200 | return -EINVAL; | |
2201 | ||
2202 | datagrams = 0; | |
2203 | ||
2204 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2205 | if (!sock) | |
2206 | return err; | |
2207 | ||
2208 | err = sock_error(sock->sk); | |
2209 | if (err) | |
2210 | goto out_put; | |
2211 | ||
2212 | entry = mmsg; | |
d7256d0e | 2213 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2214 | |
2215 | while (datagrams < vlen) { | |
2216 | /* | |
2217 | * No need to ask LSM for more than the first datagram. | |
2218 | */ | |
d7256d0e | 2219 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2220 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5 AL |
2221 | &msg_sys, flags & ~MSG_WAITFORONE, |
2222 | datagrams); | |
d7256d0e JMG |
2223 | if (err < 0) |
2224 | break; | |
2225 | err = __put_user(err, &compat_entry->msg_len); | |
2226 | ++compat_entry; | |
2227 | } else { | |
a7526eb5 | 2228 | err = ___sys_recvmsg(sock, |
666547ff | 2229 | (struct user_msghdr __user *)entry, |
a7526eb5 AL |
2230 | &msg_sys, flags & ~MSG_WAITFORONE, |
2231 | datagrams); | |
d7256d0e JMG |
2232 | if (err < 0) |
2233 | break; | |
2234 | err = put_user(err, &entry->msg_len); | |
2235 | ++entry; | |
2236 | } | |
2237 | ||
a2e27255 ACM |
2238 | if (err) |
2239 | break; | |
a2e27255 ACM |
2240 | ++datagrams; |
2241 | ||
71c5c159 BB |
2242 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2243 | if (flags & MSG_WAITFORONE) | |
2244 | flags |= MSG_DONTWAIT; | |
2245 | ||
a2e27255 ACM |
2246 | if (timeout) { |
2247 | ktime_get_ts(timeout); | |
2248 | *timeout = timespec_sub(end_time, *timeout); | |
2249 | if (timeout->tv_sec < 0) { | |
2250 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2251 | break; | |
2252 | } | |
2253 | ||
2254 | /* Timeout, return less than vlen datagrams */ | |
2255 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2256 | break; | |
2257 | } | |
2258 | ||
2259 | /* Out of band data, return right away */ | |
2260 | if (msg_sys.msg_flags & MSG_OOB) | |
2261 | break; | |
2262 | } | |
2263 | ||
2264 | out_put: | |
2265 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2266 | |
a2e27255 ACM |
2267 | if (err == 0) |
2268 | return datagrams; | |
2269 | ||
2270 | if (datagrams != 0) { | |
2271 | /* | |
2272 | * We may return less entries than requested (vlen) if the | |
2273 | * sock is non block and there aren't enough datagrams... | |
2274 | */ | |
2275 | if (err != -EAGAIN) { | |
2276 | /* | |
2277 | * ... or if recvmsg returns an error after we | |
2278 | * received some datagrams, where we record the | |
2279 | * error to return on the next call or if the | |
2280 | * app asks about it using getsockopt(SO_ERROR). | |
2281 | */ | |
2282 | sock->sk->sk_err = -err; | |
2283 | } | |
2284 | ||
2285 | return datagrams; | |
2286 | } | |
2287 | ||
2288 | return err; | |
2289 | } | |
2290 | ||
2291 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2292 | unsigned int, vlen, unsigned int, flags, | |
2293 | struct timespec __user *, timeout) | |
2294 | { | |
2295 | int datagrams; | |
2296 | struct timespec timeout_sys; | |
2297 | ||
1be374a0 AL |
2298 | if (flags & MSG_CMSG_COMPAT) |
2299 | return -EINVAL; | |
2300 | ||
a2e27255 ACM |
2301 | if (!timeout) |
2302 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2303 | ||
2304 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2305 | return -EFAULT; | |
2306 | ||
2307 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2308 | ||
2309 | if (datagrams > 0 && | |
2310 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2311 | datagrams = -EFAULT; | |
2312 | ||
2313 | return datagrams; | |
2314 | } | |
2315 | ||
2316 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2317 | /* Argument list sizes for sys_socketcall */ |
2318 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2319 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2320 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2321 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2322 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2323 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2324 | }; |
2325 | ||
1da177e4 LT |
2326 | #undef AL |
2327 | ||
2328 | /* | |
89bddce5 | 2329 | * System call vectors. |
1da177e4 LT |
2330 | * |
2331 | * Argument checking cleaned up. Saved 20% in size. | |
2332 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2333 | * it is set by the callees. |
1da177e4 LT |
2334 | */ |
2335 | ||
3e0fa65f | 2336 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2337 | { |
2950fa9d | 2338 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2339 | unsigned long a0, a1; |
1da177e4 | 2340 | int err; |
47379052 | 2341 | unsigned int len; |
1da177e4 | 2342 | |
228e548e | 2343 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2344 | return -EINVAL; |
2345 | ||
47379052 AV |
2346 | len = nargs[call]; |
2347 | if (len > sizeof(a)) | |
2348 | return -EINVAL; | |
2349 | ||
1da177e4 | 2350 | /* copy_from_user should be SMP safe. */ |
47379052 | 2351 | if (copy_from_user(a, args, len)) |
1da177e4 | 2352 | return -EFAULT; |
3ec3b2fb | 2353 | |
2950fa9d CG |
2354 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2355 | if (err) | |
2356 | return err; | |
3ec3b2fb | 2357 | |
89bddce5 SH |
2358 | a0 = a[0]; |
2359 | a1 = a[1]; | |
2360 | ||
2361 | switch (call) { | |
2362 | case SYS_SOCKET: | |
2363 | err = sys_socket(a0, a1, a[2]); | |
2364 | break; | |
2365 | case SYS_BIND: | |
2366 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2367 | break; | |
2368 | case SYS_CONNECT: | |
2369 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2370 | break; | |
2371 | case SYS_LISTEN: | |
2372 | err = sys_listen(a0, a1); | |
2373 | break; | |
2374 | case SYS_ACCEPT: | |
de11defe UD |
2375 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2376 | (int __user *)a[2], 0); | |
89bddce5 SH |
2377 | break; |
2378 | case SYS_GETSOCKNAME: | |
2379 | err = | |
2380 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2381 | (int __user *)a[2]); | |
2382 | break; | |
2383 | case SYS_GETPEERNAME: | |
2384 | err = | |
2385 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2386 | (int __user *)a[2]); | |
2387 | break; | |
2388 | case SYS_SOCKETPAIR: | |
2389 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2390 | break; | |
2391 | case SYS_SEND: | |
2392 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2393 | break; | |
2394 | case SYS_SENDTO: | |
2395 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2396 | (struct sockaddr __user *)a[4], a[5]); | |
2397 | break; | |
2398 | case SYS_RECV: | |
2399 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2400 | break; | |
2401 | case SYS_RECVFROM: | |
2402 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2403 | (struct sockaddr __user *)a[4], | |
2404 | (int __user *)a[5]); | |
2405 | break; | |
2406 | case SYS_SHUTDOWN: | |
2407 | err = sys_shutdown(a0, a1); | |
2408 | break; | |
2409 | case SYS_SETSOCKOPT: | |
2410 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2411 | break; | |
2412 | case SYS_GETSOCKOPT: | |
2413 | err = | |
2414 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2415 | (int __user *)a[4]); | |
2416 | break; | |
2417 | case SYS_SENDMSG: | |
666547ff | 2418 | err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce5 | 2419 | break; |
228e548e AB |
2420 | case SYS_SENDMMSG: |
2421 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2422 | break; | |
89bddce5 | 2423 | case SYS_RECVMSG: |
666547ff | 2424 | err = sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce5 | 2425 | break; |
a2e27255 ACM |
2426 | case SYS_RECVMMSG: |
2427 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2428 | (struct timespec __user *)a[4]); | |
2429 | break; | |
de11defe UD |
2430 | case SYS_ACCEPT4: |
2431 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2432 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2433 | break; |
89bddce5 SH |
2434 | default: |
2435 | err = -EINVAL; | |
2436 | break; | |
1da177e4 LT |
2437 | } |
2438 | return err; | |
2439 | } | |
2440 | ||
89bddce5 | 2441 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2442 | |
55737fda SH |
2443 | /** |
2444 | * sock_register - add a socket protocol handler | |
2445 | * @ops: description of protocol | |
2446 | * | |
1da177e4 LT |
2447 | * This function is called by a protocol handler that wants to |
2448 | * advertise its address family, and have it linked into the | |
e793c0f7 | 2449 | * socket interface. The value ops->family corresponds to the |
55737fda | 2450 | * socket system call protocol family. |
1da177e4 | 2451 | */ |
f0fd27d4 | 2452 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2453 | { |
2454 | int err; | |
2455 | ||
2456 | if (ops->family >= NPROTO) { | |
3410f22e | 2457 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
1da177e4 LT |
2458 | return -ENOBUFS; |
2459 | } | |
55737fda SH |
2460 | |
2461 | spin_lock(&net_family_lock); | |
190683a9 ED |
2462 | if (rcu_dereference_protected(net_families[ops->family], |
2463 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2464 | err = -EEXIST; |
2465 | else { | |
cf778b00 | 2466 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2467 | err = 0; |
2468 | } | |
55737fda SH |
2469 | spin_unlock(&net_family_lock); |
2470 | ||
3410f22e | 2471 | pr_info("NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2472 | return err; |
2473 | } | |
c6d409cf | 2474 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2475 | |
55737fda SH |
2476 | /** |
2477 | * sock_unregister - remove a protocol handler | |
2478 | * @family: protocol family to remove | |
2479 | * | |
1da177e4 LT |
2480 | * This function is called by a protocol handler that wants to |
2481 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2482 | * new socket creation. |
2483 | * | |
2484 | * If protocol handler is a module, then it can use module reference | |
2485 | * counts to protect against new references. If protocol handler is not | |
2486 | * a module then it needs to provide its own protection in | |
2487 | * the ops->create routine. | |
1da177e4 | 2488 | */ |
f0fd27d4 | 2489 | void sock_unregister(int family) |
1da177e4 | 2490 | { |
f0fd27d4 | 2491 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2492 | |
55737fda | 2493 | spin_lock(&net_family_lock); |
a9b3cd7f | 2494 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2495 | spin_unlock(&net_family_lock); |
2496 | ||
2497 | synchronize_rcu(); | |
2498 | ||
3410f22e | 2499 | pr_info("NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2500 | } |
c6d409cf | 2501 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2502 | |
77d76ea3 | 2503 | static int __init sock_init(void) |
1da177e4 | 2504 | { |
b3e19d92 | 2505 | int err; |
2ca794e5 EB |
2506 | /* |
2507 | * Initialize the network sysctl infrastructure. | |
2508 | */ | |
2509 | err = net_sysctl_init(); | |
2510 | if (err) | |
2511 | goto out; | |
b3e19d92 | 2512 | |
1da177e4 | 2513 | /* |
89bddce5 | 2514 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2515 | */ |
2516 | skb_init(); | |
1da177e4 LT |
2517 | |
2518 | /* | |
89bddce5 | 2519 | * Initialize the protocols module. |
1da177e4 LT |
2520 | */ |
2521 | ||
2522 | init_inodecache(); | |
b3e19d92 NP |
2523 | |
2524 | err = register_filesystem(&sock_fs_type); | |
2525 | if (err) | |
2526 | goto out_fs; | |
1da177e4 | 2527 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2528 | if (IS_ERR(sock_mnt)) { |
2529 | err = PTR_ERR(sock_mnt); | |
2530 | goto out_mount; | |
2531 | } | |
77d76ea3 AK |
2532 | |
2533 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2534 | */ |
2535 | ||
2536 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2537 | err = netfilter_init(); |
2538 | if (err) | |
2539 | goto out; | |
1da177e4 | 2540 | #endif |
cbeb321a | 2541 | |
408eccce | 2542 | ptp_classifier_init(); |
c1f19b51 | 2543 | |
b3e19d92 NP |
2544 | out: |
2545 | return err; | |
2546 | ||
2547 | out_mount: | |
2548 | unregister_filesystem(&sock_fs_type); | |
2549 | out_fs: | |
2550 | goto out; | |
1da177e4 LT |
2551 | } |
2552 | ||
77d76ea3 AK |
2553 | core_initcall(sock_init); /* early initcall */ |
2554 | ||
1da177e4 LT |
2555 | #ifdef CONFIG_PROC_FS |
2556 | void socket_seq_show(struct seq_file *seq) | |
2557 | { | |
2558 | int cpu; | |
2559 | int counter = 0; | |
2560 | ||
6f912042 | 2561 | for_each_possible_cpu(cpu) |
89bddce5 | 2562 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2563 | |
2564 | /* It can be negative, by the way. 8) */ | |
2565 | if (counter < 0) | |
2566 | counter = 0; | |
2567 | ||
2568 | seq_printf(seq, "sockets: used %d\n", counter); | |
2569 | } | |
89bddce5 | 2570 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2571 | |
89bbfc95 | 2572 | #ifdef CONFIG_COMPAT |
6b96018b | 2573 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2574 | unsigned int cmd, void __user *up) |
7a229387 | 2575 | { |
7a229387 AB |
2576 | mm_segment_t old_fs = get_fs(); |
2577 | struct timeval ktv; | |
2578 | int err; | |
2579 | ||
2580 | set_fs(KERNEL_DS); | |
6b96018b | 2581 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2582 | set_fs(old_fs); |
644595f8 | 2583 | if (!err) |
ed6fe9d6 | 2584 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2585 | |
7a229387 AB |
2586 | return err; |
2587 | } | |
2588 | ||
6b96018b | 2589 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2590 | unsigned int cmd, void __user *up) |
7a229387 | 2591 | { |
7a229387 AB |
2592 | mm_segment_t old_fs = get_fs(); |
2593 | struct timespec kts; | |
2594 | int err; | |
2595 | ||
2596 | set_fs(KERNEL_DS); | |
6b96018b | 2597 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2598 | set_fs(old_fs); |
644595f8 | 2599 | if (!err) |
ed6fe9d6 | 2600 | err = compat_put_timespec(&kts, up); |
644595f8 | 2601 | |
7a229387 AB |
2602 | return err; |
2603 | } | |
2604 | ||
6b96018b | 2605 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2606 | { |
2607 | struct ifreq __user *uifr; | |
2608 | int err; | |
2609 | ||
2610 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2611 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2612 | return -EFAULT; |
2613 | ||
6b96018b | 2614 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2615 | if (err) |
2616 | return err; | |
2617 | ||
6b96018b | 2618 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2619 | return -EFAULT; |
2620 | ||
2621 | return 0; | |
2622 | } | |
2623 | ||
6b96018b | 2624 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2625 | { |
6b96018b | 2626 | struct compat_ifconf ifc32; |
7a229387 AB |
2627 | struct ifconf ifc; |
2628 | struct ifconf __user *uifc; | |
6b96018b | 2629 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2630 | struct ifreq __user *ifr; |
2631 | unsigned int i, j; | |
2632 | int err; | |
2633 | ||
6b96018b | 2634 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2635 | return -EFAULT; |
2636 | ||
43da5f2e | 2637 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2638 | if (ifc32.ifcbuf == 0) { |
2639 | ifc32.ifc_len = 0; | |
2640 | ifc.ifc_len = 0; | |
2641 | ifc.ifc_req = NULL; | |
2642 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2643 | } else { | |
c6d409cf ED |
2644 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2645 | sizeof(struct ifreq); | |
7a229387 AB |
2646 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2647 | ifc.ifc_len = len; | |
2648 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2649 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2650 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2651 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2652 | return -EFAULT; |
2653 | ifr++; | |
2654 | ifr32++; | |
2655 | } | |
2656 | } | |
2657 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2658 | return -EFAULT; | |
2659 | ||
6b96018b | 2660 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2661 | if (err) |
2662 | return err; | |
2663 | ||
2664 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2665 | return -EFAULT; | |
2666 | ||
2667 | ifr = ifc.ifc_req; | |
2668 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2669 | for (i = 0, j = 0; | |
c6d409cf ED |
2670 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2671 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2672 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2673 | return -EFAULT; |
2674 | ifr32++; | |
2675 | ifr++; | |
2676 | } | |
2677 | ||
2678 | if (ifc32.ifcbuf == 0) { | |
2679 | /* Translate from 64-bit structure multiple to | |
2680 | * a 32-bit one. | |
2681 | */ | |
2682 | i = ifc.ifc_len; | |
6b96018b | 2683 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2684 | ifc32.ifc_len = i; |
2685 | } else { | |
2686 | ifc32.ifc_len = i; | |
2687 | } | |
6b96018b | 2688 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2689 | return -EFAULT; |
2690 | ||
2691 | return 0; | |
2692 | } | |
2693 | ||
6b96018b | 2694 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2695 | { |
3a7da39d BH |
2696 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2697 | bool convert_in = false, convert_out = false; | |
2698 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2699 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2700 | struct ifreq __user *ifr; |
3a7da39d BH |
2701 | u32 rule_cnt = 0, actual_rule_cnt; |
2702 | u32 ethcmd; | |
7a229387 | 2703 | u32 data; |
3a7da39d | 2704 | int ret; |
7a229387 | 2705 | |
3a7da39d BH |
2706 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2707 | return -EFAULT; | |
7a229387 | 2708 | |
3a7da39d BH |
2709 | compat_rxnfc = compat_ptr(data); |
2710 | ||
2711 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2712 | return -EFAULT; |
2713 | ||
3a7da39d BH |
2714 | /* Most ethtool structures are defined without padding. |
2715 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2716 | */ | |
2717 | switch (ethcmd) { | |
2718 | default: | |
2719 | break; | |
2720 | case ETHTOOL_GRXCLSRLALL: | |
2721 | /* Buffer size is variable */ | |
2722 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2723 | return -EFAULT; | |
2724 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2725 | return -ENOMEM; | |
2726 | buf_size += rule_cnt * sizeof(u32); | |
2727 | /* fall through */ | |
2728 | case ETHTOOL_GRXRINGS: | |
2729 | case ETHTOOL_GRXCLSRLCNT: | |
2730 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2731 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2732 | convert_out = true; |
2733 | /* fall through */ | |
2734 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2735 | buf_size += sizeof(struct ethtool_rxnfc); |
2736 | convert_in = true; | |
2737 | break; | |
2738 | } | |
2739 | ||
2740 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2741 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2742 | |
2743 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2744 | return -EFAULT; |
2745 | ||
3a7da39d BH |
2746 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2747 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2748 | return -EFAULT; |
2749 | ||
3a7da39d | 2750 | if (convert_in) { |
127fe533 | 2751 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2752 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2753 | */ | |
127fe533 AD |
2754 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2755 | sizeof(compat_rxnfc->fs.m_ext) != | |
2756 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2757 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2758 | BUILD_BUG_ON( |
2759 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2760 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2761 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2762 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2763 | ||
2764 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2765 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2766 | (void __user *)rxnfc) || | |
3a7da39d BH |
2767 | copy_in_user(&rxnfc->fs.ring_cookie, |
2768 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2769 | (void __user *)(&rxnfc->fs.location + 1) - |
2770 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2771 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2772 | sizeof(rxnfc->rule_cnt))) | |
2773 | return -EFAULT; | |
2774 | } | |
2775 | ||
2776 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2777 | if (ret) | |
2778 | return ret; | |
2779 | ||
2780 | if (convert_out) { | |
2781 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2782 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2783 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2784 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2785 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2786 | (const void __user *)(&rxnfc->fs.location + 1) - |
2787 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2788 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2789 | sizeof(rxnfc->rule_cnt))) | |
2790 | return -EFAULT; | |
2791 | ||
2792 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2793 | /* As an optimisation, we only copy the actual | |
2794 | * number of rules that the underlying | |
2795 | * function returned. Since Mallory might | |
2796 | * change the rule count in user memory, we | |
2797 | * check that it is less than the rule count | |
2798 | * originally given (as the user buffer size), | |
2799 | * which has been range-checked. | |
2800 | */ | |
2801 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2802 | return -EFAULT; | |
2803 | if (actual_rule_cnt < rule_cnt) | |
2804 | rule_cnt = actual_rule_cnt; | |
2805 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2806 | &rxnfc->rule_locs[0], | |
2807 | rule_cnt * sizeof(u32))) | |
2808 | return -EFAULT; | |
2809 | } | |
2810 | } | |
2811 | ||
2812 | return 0; | |
7a229387 AB |
2813 | } |
2814 | ||
7a50a240 AB |
2815 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2816 | { | |
2817 | void __user *uptr; | |
2818 | compat_uptr_t uptr32; | |
2819 | struct ifreq __user *uifr; | |
2820 | ||
c6d409cf | 2821 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2822 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2823 | return -EFAULT; | |
2824 | ||
2825 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2826 | return -EFAULT; | |
2827 | ||
2828 | uptr = compat_ptr(uptr32); | |
2829 | ||
2830 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2831 | return -EFAULT; | |
2832 | ||
2833 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2834 | } | |
2835 | ||
6b96018b AB |
2836 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2837 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2838 | { |
2839 | struct ifreq kifr; | |
7a229387 AB |
2840 | mm_segment_t old_fs; |
2841 | int err; | |
7a229387 AB |
2842 | |
2843 | switch (cmd) { | |
2844 | case SIOCBONDENSLAVE: | |
2845 | case SIOCBONDRELEASE: | |
2846 | case SIOCBONDSETHWADDR: | |
2847 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2848 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2849 | return -EFAULT; |
2850 | ||
2851 | old_fs = get_fs(); | |
c6d409cf | 2852 | set_fs(KERNEL_DS); |
c3f52ae6 | 2853 | err = dev_ioctl(net, cmd, |
2854 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2855 | set_fs(old_fs); |
7a229387 AB |
2856 | |
2857 | return err; | |
7a229387 | 2858 | default: |
07d106d0 | 2859 | return -ENOIOCTLCMD; |
ccbd6a5a | 2860 | } |
7a229387 AB |
2861 | } |
2862 | ||
590d4693 BH |
2863 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
2864 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, | |
6b96018b | 2865 | struct compat_ifreq __user *u_ifreq32) |
7a229387 AB |
2866 | { |
2867 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2868 | char tmp_buf[IFNAMSIZ]; |
2869 | void __user *data64; | |
2870 | u32 data32; | |
2871 | ||
2872 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2873 | IFNAMSIZ)) | |
2874 | return -EFAULT; | |
417c3522 | 2875 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
7a229387 AB |
2876 | return -EFAULT; |
2877 | data64 = compat_ptr(data32); | |
2878 | ||
2879 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2880 | ||
7a229387 AB |
2881 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
2882 | IFNAMSIZ)) | |
2883 | return -EFAULT; | |
417c3522 | 2884 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
7a229387 AB |
2885 | return -EFAULT; |
2886 | ||
6b96018b | 2887 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2888 | } |
2889 | ||
6b96018b AB |
2890 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2891 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2892 | { |
a2116ed2 | 2893 | struct ifreq __user *uifr; |
7a229387 AB |
2894 | int err; |
2895 | ||
a2116ed2 AB |
2896 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2897 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2898 | return -EFAULT; | |
2899 | ||
2900 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2901 | ||
7a229387 AB |
2902 | if (!err) { |
2903 | switch (cmd) { | |
2904 | case SIOCGIFFLAGS: | |
2905 | case SIOCGIFMETRIC: | |
2906 | case SIOCGIFMTU: | |
2907 | case SIOCGIFMEM: | |
2908 | case SIOCGIFHWADDR: | |
2909 | case SIOCGIFINDEX: | |
2910 | case SIOCGIFADDR: | |
2911 | case SIOCGIFBRDADDR: | |
2912 | case SIOCGIFDSTADDR: | |
2913 | case SIOCGIFNETMASK: | |
fab2532b | 2914 | case SIOCGIFPFLAGS: |
7a229387 | 2915 | case SIOCGIFTXQLEN: |
fab2532b AB |
2916 | case SIOCGMIIPHY: |
2917 | case SIOCGMIIREG: | |
a2116ed2 | 2918 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2919 | err = -EFAULT; |
2920 | break; | |
2921 | } | |
2922 | } | |
2923 | return err; | |
2924 | } | |
2925 | ||
a2116ed2 AB |
2926 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2927 | struct compat_ifreq __user *uifr32) | |
2928 | { | |
2929 | struct ifreq ifr; | |
2930 | struct compat_ifmap __user *uifmap32; | |
2931 | mm_segment_t old_fs; | |
2932 | int err; | |
2933 | ||
2934 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2935 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
2936 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
2937 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2938 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2939 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2940 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2941 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
2942 | if (err) |
2943 | return -EFAULT; | |
2944 | ||
2945 | old_fs = get_fs(); | |
c6d409cf | 2946 | set_fs(KERNEL_DS); |
c3f52ae6 | 2947 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 2948 | set_fs(old_fs); |
a2116ed2 AB |
2949 | |
2950 | if (cmd == SIOCGIFMAP && !err) { | |
2951 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
2952 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
2953 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2954 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2955 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2956 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2957 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
2958 | if (err) |
2959 | err = -EFAULT; | |
2960 | } | |
2961 | return err; | |
2962 | } | |
2963 | ||
7a229387 | 2964 | struct rtentry32 { |
c6d409cf | 2965 | u32 rt_pad1; |
7a229387 AB |
2966 | struct sockaddr rt_dst; /* target address */ |
2967 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
2968 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
2969 | unsigned short rt_flags; |
2970 | short rt_pad2; | |
2971 | u32 rt_pad3; | |
2972 | unsigned char rt_tos; | |
2973 | unsigned char rt_class; | |
2974 | short rt_pad4; | |
2975 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 2976 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
2977 | u32 rt_mtu; /* per route MTU/Window */ |
2978 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
2979 | unsigned short rt_irtt; /* Initial RTT */ |
2980 | }; | |
2981 | ||
2982 | struct in6_rtmsg32 { | |
2983 | struct in6_addr rtmsg_dst; | |
2984 | struct in6_addr rtmsg_src; | |
2985 | struct in6_addr rtmsg_gateway; | |
2986 | u32 rtmsg_type; | |
2987 | u16 rtmsg_dst_len; | |
2988 | u16 rtmsg_src_len; | |
2989 | u32 rtmsg_metric; | |
2990 | u32 rtmsg_info; | |
2991 | u32 rtmsg_flags; | |
2992 | s32 rtmsg_ifindex; | |
2993 | }; | |
2994 | ||
6b96018b AB |
2995 | static int routing_ioctl(struct net *net, struct socket *sock, |
2996 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
2997 | { |
2998 | int ret; | |
2999 | void *r = NULL; | |
3000 | struct in6_rtmsg r6; | |
3001 | struct rtentry r4; | |
3002 | char devname[16]; | |
3003 | u32 rtdev; | |
3004 | mm_segment_t old_fs = get_fs(); | |
3005 | ||
6b96018b AB |
3006 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3007 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3008 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3009 | 3 * sizeof(struct in6_addr)); |
3ddc5b46 MD |
3010 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3011 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3012 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3013 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3014 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3015 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3016 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3017 | |
3018 | r = (void *) &r6; | |
3019 | } else { /* ipv4 */ | |
6b96018b | 3020 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3021 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3022 | 3 * sizeof(struct sockaddr)); |
3ddc5b46 MD |
3023 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
3024 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3025 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3026 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); | |
3027 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3028 | ret |= get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3029 | if (rtdev) { |
c6d409cf | 3030 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3031 | r4.rt_dev = (char __user __force *)devname; |
3032 | devname[15] = 0; | |
7a229387 AB |
3033 | } else |
3034 | r4.rt_dev = NULL; | |
3035 | ||
3036 | r = (void *) &r4; | |
3037 | } | |
3038 | ||
3039 | if (ret) { | |
3040 | ret = -EFAULT; | |
3041 | goto out; | |
3042 | } | |
3043 | ||
c6d409cf | 3044 | set_fs(KERNEL_DS); |
6b96018b | 3045 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3046 | set_fs(old_fs); |
7a229387 AB |
3047 | |
3048 | out: | |
7a229387 AB |
3049 | return ret; |
3050 | } | |
3051 | ||
3052 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3053 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3054 | * use compatible ioctls |
7a229387 | 3055 | */ |
6b96018b | 3056 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3057 | { |
6b96018b | 3058 | compat_ulong_t tmp; |
7a229387 | 3059 | |
6b96018b | 3060 | if (get_user(tmp, argp)) |
7a229387 AB |
3061 | return -EFAULT; |
3062 | if (tmp == BRCTL_GET_VERSION) | |
3063 | return BRCTL_VERSION + 1; | |
3064 | return -EINVAL; | |
3065 | } | |
3066 | ||
6b96018b AB |
3067 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3068 | unsigned int cmd, unsigned long arg) | |
3069 | { | |
3070 | void __user *argp = compat_ptr(arg); | |
3071 | struct sock *sk = sock->sk; | |
3072 | struct net *net = sock_net(sk); | |
7a229387 | 3073 | |
6b96018b | 3074 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693 | 3075 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3076 | |
3077 | switch (cmd) { | |
3078 | case SIOCSIFBR: | |
3079 | case SIOCGIFBR: | |
3080 | return old_bridge_ioctl(argp); | |
3081 | case SIOCGIFNAME: | |
3082 | return dev_ifname32(net, argp); | |
3083 | case SIOCGIFCONF: | |
3084 | return dev_ifconf(net, argp); | |
3085 | case SIOCETHTOOL: | |
3086 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3087 | case SIOCWANDEV: |
3088 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3089 | case SIOCGIFMAP: |
3090 | case SIOCSIFMAP: | |
3091 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3092 | case SIOCBONDENSLAVE: |
3093 | case SIOCBONDRELEASE: | |
3094 | case SIOCBONDSETHWADDR: | |
6b96018b AB |
3095 | case SIOCBONDCHANGEACTIVE: |
3096 | return bond_ioctl(net, cmd, argp); | |
3097 | case SIOCADDRT: | |
3098 | case SIOCDELRT: | |
3099 | return routing_ioctl(net, sock, cmd, argp); | |
3100 | case SIOCGSTAMP: | |
3101 | return do_siocgstamp(net, sock, cmd, argp); | |
3102 | case SIOCGSTAMPNS: | |
3103 | return do_siocgstampns(net, sock, cmd, argp); | |
590d4693 BH |
3104 | case SIOCBONDSLAVEINFOQUERY: |
3105 | case SIOCBONDINFOQUERY: | |
a2116ed2 | 3106 | case SIOCSHWTSTAMP: |
fd468c74 | 3107 | case SIOCGHWTSTAMP: |
590d4693 | 3108 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3109 | |
3110 | case FIOSETOWN: | |
3111 | case SIOCSPGRP: | |
3112 | case FIOGETOWN: | |
3113 | case SIOCGPGRP: | |
3114 | case SIOCBRADDBR: | |
3115 | case SIOCBRDELBR: | |
3116 | case SIOCGIFVLAN: | |
3117 | case SIOCSIFVLAN: | |
3118 | case SIOCADDDLCI: | |
3119 | case SIOCDELDLCI: | |
3120 | return sock_ioctl(file, cmd, arg); | |
3121 | ||
3122 | case SIOCGIFFLAGS: | |
3123 | case SIOCSIFFLAGS: | |
3124 | case SIOCGIFMETRIC: | |
3125 | case SIOCSIFMETRIC: | |
3126 | case SIOCGIFMTU: | |
3127 | case SIOCSIFMTU: | |
3128 | case SIOCGIFMEM: | |
3129 | case SIOCSIFMEM: | |
3130 | case SIOCGIFHWADDR: | |
3131 | case SIOCSIFHWADDR: | |
3132 | case SIOCADDMULTI: | |
3133 | case SIOCDELMULTI: | |
3134 | case SIOCGIFINDEX: | |
6b96018b AB |
3135 | case SIOCGIFADDR: |
3136 | case SIOCSIFADDR: | |
3137 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3138 | case SIOCDIFADDR: |
6b96018b AB |
3139 | case SIOCGIFBRDADDR: |
3140 | case SIOCSIFBRDADDR: | |
3141 | case SIOCGIFDSTADDR: | |
3142 | case SIOCSIFDSTADDR: | |
3143 | case SIOCGIFNETMASK: | |
3144 | case SIOCSIFNETMASK: | |
3145 | case SIOCSIFPFLAGS: | |
3146 | case SIOCGIFPFLAGS: | |
3147 | case SIOCGIFTXQLEN: | |
3148 | case SIOCSIFTXQLEN: | |
3149 | case SIOCBRADDIF: | |
3150 | case SIOCBRDELIF: | |
9177efd3 AB |
3151 | case SIOCSIFNAME: |
3152 | case SIOCGMIIPHY: | |
3153 | case SIOCGMIIREG: | |
3154 | case SIOCSMIIREG: | |
6b96018b | 3155 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3156 | |
6b96018b AB |
3157 | case SIOCSARP: |
3158 | case SIOCGARP: | |
3159 | case SIOCDARP: | |
6b96018b | 3160 | case SIOCATMARK: |
9177efd3 AB |
3161 | return sock_do_ioctl(net, sock, cmd, arg); |
3162 | } | |
3163 | ||
6b96018b AB |
3164 | return -ENOIOCTLCMD; |
3165 | } | |
7a229387 | 3166 | |
95c96174 | 3167 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3168 | unsigned long arg) |
89bbfc95 SP |
3169 | { |
3170 | struct socket *sock = file->private_data; | |
3171 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3172 | struct sock *sk; |
3173 | struct net *net; | |
3174 | ||
3175 | sk = sock->sk; | |
3176 | net = sock_net(sk); | |
89bbfc95 SP |
3177 | |
3178 | if (sock->ops->compat_ioctl) | |
3179 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3180 | ||
87de87d5 DM |
3181 | if (ret == -ENOIOCTLCMD && |
3182 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3183 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3184 | ||
6b96018b AB |
3185 | if (ret == -ENOIOCTLCMD) |
3186 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3187 | ||
89bbfc95 SP |
3188 | return ret; |
3189 | } | |
3190 | #endif | |
3191 | ||
ac5a488e SS |
3192 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3193 | { | |
3194 | return sock->ops->bind(sock, addr, addrlen); | |
3195 | } | |
c6d409cf | 3196 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3197 | |
3198 | int kernel_listen(struct socket *sock, int backlog) | |
3199 | { | |
3200 | return sock->ops->listen(sock, backlog); | |
3201 | } | |
c6d409cf | 3202 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3203 | |
3204 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3205 | { | |
3206 | struct sock *sk = sock->sk; | |
3207 | int err; | |
3208 | ||
3209 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3210 | newsock); | |
3211 | if (err < 0) | |
3212 | goto done; | |
3213 | ||
3214 | err = sock->ops->accept(sock, *newsock, flags); | |
3215 | if (err < 0) { | |
3216 | sock_release(*newsock); | |
fa8705b0 | 3217 | *newsock = NULL; |
ac5a488e SS |
3218 | goto done; |
3219 | } | |
3220 | ||
3221 | (*newsock)->ops = sock->ops; | |
1b08534e | 3222 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3223 | |
3224 | done: | |
3225 | return err; | |
3226 | } | |
c6d409cf | 3227 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3228 | |
3229 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3230 | int flags) |
ac5a488e SS |
3231 | { |
3232 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3233 | } | |
c6d409cf | 3234 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3235 | |
3236 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3237 | int *addrlen) | |
3238 | { | |
3239 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3240 | } | |
c6d409cf | 3241 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3242 | |
3243 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3244 | int *addrlen) | |
3245 | { | |
3246 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3247 | } | |
c6d409cf | 3248 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3249 | |
3250 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3251 | char *optval, int *optlen) | |
3252 | { | |
3253 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3254 | char __user *uoptval; |
3255 | int __user *uoptlen; | |
ac5a488e SS |
3256 | int err; |
3257 | ||
fb8621bb NK |
3258 | uoptval = (char __user __force *) optval; |
3259 | uoptlen = (int __user __force *) optlen; | |
3260 | ||
ac5a488e SS |
3261 | set_fs(KERNEL_DS); |
3262 | if (level == SOL_SOCKET) | |
fb8621bb | 3263 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3264 | else |
fb8621bb NK |
3265 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3266 | uoptlen); | |
ac5a488e SS |
3267 | set_fs(oldfs); |
3268 | return err; | |
3269 | } | |
c6d409cf | 3270 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3271 | |
3272 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3273 | char *optval, unsigned int optlen) |
ac5a488e SS |
3274 | { |
3275 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3276 | char __user *uoptval; |
ac5a488e SS |
3277 | int err; |
3278 | ||
fb8621bb NK |
3279 | uoptval = (char __user __force *) optval; |
3280 | ||
ac5a488e SS |
3281 | set_fs(KERNEL_DS); |
3282 | if (level == SOL_SOCKET) | |
fb8621bb | 3283 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3284 | else |
fb8621bb | 3285 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3286 | optlen); |
3287 | set_fs(oldfs); | |
3288 | return err; | |
3289 | } | |
c6d409cf | 3290 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3291 | |
3292 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3293 | size_t size, int flags) | |
3294 | { | |
3295 | if (sock->ops->sendpage) | |
3296 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3297 | ||
3298 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3299 | } | |
c6d409cf | 3300 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3301 | |
3302 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3303 | { | |
3304 | mm_segment_t oldfs = get_fs(); | |
3305 | int err; | |
3306 | ||
3307 | set_fs(KERNEL_DS); | |
3308 | err = sock->ops->ioctl(sock, cmd, arg); | |
3309 | set_fs(oldfs); | |
3310 | ||
3311 | return err; | |
3312 | } | |
c6d409cf | 3313 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3314 | |
91cf45f0 TM |
3315 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3316 | { | |
3317 | return sock->ops->shutdown(sock, how); | |
3318 | } | |
91cf45f0 | 3319 | EXPORT_SYMBOL(kernel_sock_shutdown); |