Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 LT |
72 | #include <linux/wanrouter.h> |
73 | #include <linux/if_bridge.h> | |
20380731 ACM |
74 | #include <linux/if_frad.h> |
75 | #include <linux/if_vlan.h> | |
1da177e4 LT |
76 | #include <linux/init.h> |
77 | #include <linux/poll.h> | |
78 | #include <linux/cache.h> | |
79 | #include <linux/module.h> | |
80 | #include <linux/highmem.h> | |
1da177e4 LT |
81 | #include <linux/mount.h> |
82 | #include <linux/security.h> | |
83 | #include <linux/syscalls.h> | |
84 | #include <linux/compat.h> | |
85 | #include <linux/kmod.h> | |
3ec3b2fb | 86 | #include <linux/audit.h> |
d86b5e0e | 87 | #include <linux/wireless.h> |
1b8d7ae4 | 88 | #include <linux/nsproxy.h> |
1fd7317d | 89 | #include <linux/magic.h> |
5a0e3ad6 | 90 | #include <linux/slab.h> |
1da177e4 LT |
91 | |
92 | #include <asm/uaccess.h> | |
93 | #include <asm/unistd.h> | |
94 | ||
95 | #include <net/compat.h> | |
87de87d5 | 96 | #include <net/wext.h> |
f8451725 | 97 | #include <net/cls_cgroup.h> |
1da177e4 LT |
98 | |
99 | #include <net/sock.h> | |
100 | #include <linux/netfilter.h> | |
101 | ||
6b96018b AB |
102 | #include <linux/if_tun.h> |
103 | #include <linux/ipv6_route.h> | |
104 | #include <linux/route.h> | |
6b96018b AB |
105 | #include <linux/sockios.h> |
106 | #include <linux/atalk.h> | |
107 | ||
1da177e4 | 108 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
109 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
110 | unsigned long nr_segs, loff_t pos); | |
111 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
112 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 113 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
114 | |
115 | static int sock_close(struct inode *inode, struct file *file); | |
116 | static unsigned int sock_poll(struct file *file, | |
117 | struct poll_table_struct *wait); | |
89bddce5 | 118 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
119 | #ifdef CONFIG_COMPAT |
120 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 121 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 122 | #endif |
1da177e4 | 123 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
124 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
125 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 126 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 127 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 128 | unsigned int flags); |
1da177e4 | 129 | |
1da177e4 LT |
130 | /* |
131 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
132 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
133 | */ | |
134 | ||
da7071d7 | 135 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
136 | .owner = THIS_MODULE, |
137 | .llseek = no_llseek, | |
138 | .aio_read = sock_aio_read, | |
139 | .aio_write = sock_aio_write, | |
140 | .poll = sock_poll, | |
141 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
142 | #ifdef CONFIG_COMPAT |
143 | .compat_ioctl = compat_sock_ioctl, | |
144 | #endif | |
1da177e4 LT |
145 | .mmap = sock_mmap, |
146 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
147 | .release = sock_close, | |
148 | .fasync = sock_fasync, | |
5274f052 JA |
149 | .sendpage = sock_sendpage, |
150 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 151 | .splice_read = sock_splice_read, |
1da177e4 LT |
152 | }; |
153 | ||
154 | /* | |
155 | * The protocol list. Each protocol is registered in here. | |
156 | */ | |
157 | ||
1da177e4 | 158 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 159 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 160 | |
1da177e4 LT |
161 | /* |
162 | * Statistics counters of the socket lists | |
163 | */ | |
164 | ||
c6d409cf | 165 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
166 | |
167 | /* | |
89bddce5 SH |
168 | * Support routines. |
169 | * Move socket addresses back and forth across the kernel/user | |
170 | * divide and look after the messy bits. | |
1da177e4 LT |
171 | */ |
172 | ||
1da177e4 LT |
173 | /** |
174 | * move_addr_to_kernel - copy a socket address into kernel space | |
175 | * @uaddr: Address in user space | |
176 | * @kaddr: Address in kernel space | |
177 | * @ulen: Length in user space | |
178 | * | |
179 | * The address is copied into kernel space. If the provided address is | |
180 | * too long an error code of -EINVAL is returned. If the copy gives | |
181 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
182 | */ | |
183 | ||
43db362d | 184 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 185 | { |
230b1839 | 186 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 187 | return -EINVAL; |
89bddce5 | 188 | if (ulen == 0) |
1da177e4 | 189 | return 0; |
89bddce5 | 190 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 191 | return -EFAULT; |
3ec3b2fb | 192 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
193 | } |
194 | ||
195 | /** | |
196 | * move_addr_to_user - copy an address to user space | |
197 | * @kaddr: kernel space address | |
198 | * @klen: length of address in kernel | |
199 | * @uaddr: user space address | |
200 | * @ulen: pointer to user length field | |
201 | * | |
202 | * The value pointed to by ulen on entry is the buffer length available. | |
203 | * This is overwritten with the buffer space used. -EINVAL is returned | |
204 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
205 | * is returned if either the buffer or the length field are not | |
206 | * accessible. | |
207 | * After copying the data up to the limit the user specifies, the true | |
208 | * length of the data is written over the length limit the user | |
209 | * specified. Zero is returned for a success. | |
210 | */ | |
89bddce5 | 211 | |
43db362d | 212 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 213 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
214 | { |
215 | int err; | |
216 | int len; | |
217 | ||
89bddce5 SH |
218 | err = get_user(len, ulen); |
219 | if (err) | |
1da177e4 | 220 | return err; |
89bddce5 SH |
221 | if (len > klen) |
222 | len = klen; | |
230b1839 | 223 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 224 | return -EINVAL; |
89bddce5 | 225 | if (len) { |
d6fe3945 SG |
226 | if (audit_sockaddr(klen, kaddr)) |
227 | return -ENOMEM; | |
89bddce5 | 228 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
229 | return -EFAULT; |
230 | } | |
231 | /* | |
89bddce5 SH |
232 | * "fromlen shall refer to the value before truncation.." |
233 | * 1003.1g | |
1da177e4 LT |
234 | */ |
235 | return __put_user(klen, ulen); | |
236 | } | |
237 | ||
e18b890b | 238 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
239 | |
240 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
241 | { | |
242 | struct socket_alloc *ei; | |
eaefd110 | 243 | struct socket_wq *wq; |
89bddce5 | 244 | |
e94b1766 | 245 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
246 | if (!ei) |
247 | return NULL; | |
eaefd110 ED |
248 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
249 | if (!wq) { | |
43815482 ED |
250 | kmem_cache_free(sock_inode_cachep, ei); |
251 | return NULL; | |
252 | } | |
eaefd110 ED |
253 | init_waitqueue_head(&wq->wait); |
254 | wq->fasync_list = NULL; | |
255 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 256 | |
1da177e4 LT |
257 | ei->socket.state = SS_UNCONNECTED; |
258 | ei->socket.flags = 0; | |
259 | ei->socket.ops = NULL; | |
260 | ei->socket.sk = NULL; | |
261 | ei->socket.file = NULL; | |
1da177e4 LT |
262 | |
263 | return &ei->vfs_inode; | |
264 | } | |
265 | ||
266 | static void sock_destroy_inode(struct inode *inode) | |
267 | { | |
43815482 | 268 | struct socket_alloc *ei; |
eaefd110 | 269 | struct socket_wq *wq; |
43815482 ED |
270 | |
271 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 272 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 273 | kfree_rcu(wq, rcu); |
43815482 | 274 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
275 | } |
276 | ||
51cc5068 | 277 | static void init_once(void *foo) |
1da177e4 | 278 | { |
89bddce5 | 279 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 280 | |
a35afb83 | 281 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 282 | } |
89bddce5 | 283 | |
1da177e4 LT |
284 | static int init_inodecache(void) |
285 | { | |
286 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
287 | sizeof(struct socket_alloc), |
288 | 0, | |
289 | (SLAB_HWCACHE_ALIGN | | |
290 | SLAB_RECLAIM_ACCOUNT | | |
291 | SLAB_MEM_SPREAD), | |
20c2df83 | 292 | init_once); |
1da177e4 LT |
293 | if (sock_inode_cachep == NULL) |
294 | return -ENOMEM; | |
295 | return 0; | |
296 | } | |
297 | ||
b87221de | 298 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
299 | .alloc_inode = sock_alloc_inode, |
300 | .destroy_inode = sock_destroy_inode, | |
301 | .statfs = simple_statfs, | |
1da177e4 LT |
302 | }; |
303 | ||
c23fbb6b ED |
304 | /* |
305 | * sockfs_dname() is called from d_path(). | |
306 | */ | |
307 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
308 | { | |
309 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
310 | dentry->d_inode->i_ino); | |
311 | } | |
312 | ||
3ba13d17 | 313 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 314 | .d_dname = sockfs_dname, |
1da177e4 LT |
315 | }; |
316 | ||
c74a1cbb AV |
317 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
318 | int flags, const char *dev_name, void *data) | |
319 | { | |
320 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
321 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
322 | } | |
323 | ||
324 | static struct vfsmount *sock_mnt __read_mostly; | |
325 | ||
326 | static struct file_system_type sock_fs_type = { | |
327 | .name = "sockfs", | |
328 | .mount = sockfs_mount, | |
329 | .kill_sb = kill_anon_super, | |
330 | }; | |
331 | ||
1da177e4 LT |
332 | /* |
333 | * Obtains the first available file descriptor and sets it up for use. | |
334 | * | |
39d8c1b6 DM |
335 | * These functions create file structures and maps them to fd space |
336 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
337 | * and file struct implicitly stored in sock->file. |
338 | * Note that another thread may close file descriptor before we return | |
339 | * from this function. We use the fact that now we do not refer | |
340 | * to socket after mapping. If one day we will need it, this | |
341 | * function will increment ref. count on file by 1. | |
342 | * | |
343 | * In any case returned fd MAY BE not valid! | |
344 | * This race condition is unavoidable | |
345 | * with shared fd spaces, we cannot solve it inside kernel, | |
346 | * but we take care of internal coherence yet. | |
347 | */ | |
348 | ||
7cbe66b6 | 349 | static int sock_alloc_file(struct socket *sock, struct file **f, int flags) |
1da177e4 | 350 | { |
7cbe66b6 | 351 | struct qstr name = { .name = "" }; |
2c48b9c4 | 352 | struct path path; |
7cbe66b6 | 353 | struct file *file; |
1da177e4 | 354 | int fd; |
1da177e4 | 355 | |
a677a039 | 356 | fd = get_unused_fd_flags(flags); |
7cbe66b6 AV |
357 | if (unlikely(fd < 0)) |
358 | return fd; | |
1da177e4 | 359 | |
4b936885 | 360 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
2c48b9c4 | 361 | if (unlikely(!path.dentry)) { |
7cbe66b6 | 362 | put_unused_fd(fd); |
39d8c1b6 | 363 | return -ENOMEM; |
7cbe66b6 | 364 | } |
2c48b9c4 | 365 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 366 | |
2c48b9c4 | 367 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 368 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 369 | |
2c48b9c4 | 370 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 371 | &socket_file_ops); |
cc3808f8 AV |
372 | if (unlikely(!file)) { |
373 | /* drop dentry, keep inode */ | |
7de9c6ee | 374 | ihold(path.dentry->d_inode); |
2c48b9c4 | 375 | path_put(&path); |
cc3808f8 AV |
376 | put_unused_fd(fd); |
377 | return -ENFILE; | |
378 | } | |
379 | ||
380 | sock->file = file; | |
77d27200 | 381 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
382 | file->f_pos = 0; |
383 | file->private_data = sock; | |
1da177e4 | 384 | |
7cbe66b6 AV |
385 | *f = file; |
386 | return fd; | |
39d8c1b6 DM |
387 | } |
388 | ||
a677a039 | 389 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
390 | { |
391 | struct file *newfile; | |
7cbe66b6 | 392 | int fd = sock_alloc_file(sock, &newfile, flags); |
39d8c1b6 | 393 | |
7cbe66b6 | 394 | if (likely(fd >= 0)) |
39d8c1b6 | 395 | fd_install(fd, newfile); |
7cbe66b6 | 396 | |
1da177e4 LT |
397 | return fd; |
398 | } | |
c6d409cf | 399 | EXPORT_SYMBOL(sock_map_fd); |
1da177e4 | 400 | |
406a3c63 | 401 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 402 | { |
6cb153ca BL |
403 | if (file->f_op == &socket_file_ops) |
404 | return file->private_data; /* set in sock_map_fd */ | |
405 | ||
23bb80d2 ED |
406 | *err = -ENOTSOCK; |
407 | return NULL; | |
6cb153ca | 408 | } |
406a3c63 | 409 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 410 | |
1da177e4 | 411 | /** |
c6d409cf | 412 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
413 | * @fd: file handle |
414 | * @err: pointer to an error code return | |
415 | * | |
416 | * The file handle passed in is locked and the socket it is bound | |
417 | * too is returned. If an error occurs the err pointer is overwritten | |
418 | * with a negative errno code and NULL is returned. The function checks | |
419 | * for both invalid handles and passing a handle which is not a socket. | |
420 | * | |
421 | * On a success the socket object pointer is returned. | |
422 | */ | |
423 | ||
424 | struct socket *sockfd_lookup(int fd, int *err) | |
425 | { | |
426 | struct file *file; | |
1da177e4 LT |
427 | struct socket *sock; |
428 | ||
89bddce5 SH |
429 | file = fget(fd); |
430 | if (!file) { | |
1da177e4 LT |
431 | *err = -EBADF; |
432 | return NULL; | |
433 | } | |
89bddce5 | 434 | |
6cb153ca BL |
435 | sock = sock_from_file(file, err); |
436 | if (!sock) | |
1da177e4 | 437 | fput(file); |
6cb153ca BL |
438 | return sock; |
439 | } | |
c6d409cf | 440 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 441 | |
6cb153ca BL |
442 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
443 | { | |
444 | struct file *file; | |
445 | struct socket *sock; | |
446 | ||
3672558c | 447 | *err = -EBADF; |
6cb153ca BL |
448 | file = fget_light(fd, fput_needed); |
449 | if (file) { | |
450 | sock = sock_from_file(file, err); | |
451 | if (sock) | |
452 | return sock; | |
453 | fput_light(file, *fput_needed); | |
1da177e4 | 454 | } |
6cb153ca | 455 | return NULL; |
1da177e4 LT |
456 | } |
457 | ||
458 | /** | |
459 | * sock_alloc - allocate a socket | |
89bddce5 | 460 | * |
1da177e4 LT |
461 | * Allocate a new inode and socket object. The two are bound together |
462 | * and initialised. The socket is then returned. If we are out of inodes | |
463 | * NULL is returned. | |
464 | */ | |
465 | ||
466 | static struct socket *sock_alloc(void) | |
467 | { | |
89bddce5 SH |
468 | struct inode *inode; |
469 | struct socket *sock; | |
1da177e4 | 470 | |
a209dfc7 | 471 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
472 | if (!inode) |
473 | return NULL; | |
474 | ||
475 | sock = SOCKET_I(inode); | |
476 | ||
29a020d3 | 477 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 478 | inode->i_ino = get_next_ino(); |
89bddce5 | 479 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
480 | inode->i_uid = current_fsuid(); |
481 | inode->i_gid = current_fsgid(); | |
1da177e4 | 482 | |
19e8d69c | 483 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
484 | return sock; |
485 | } | |
486 | ||
487 | /* | |
488 | * In theory you can't get an open on this inode, but /proc provides | |
489 | * a back door. Remember to keep it shut otherwise you'll let the | |
490 | * creepy crawlies in. | |
491 | */ | |
89bddce5 | 492 | |
1da177e4 LT |
493 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
494 | { | |
495 | return -ENXIO; | |
496 | } | |
497 | ||
4b6f5d20 | 498 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
499 | .owner = THIS_MODULE, |
500 | .open = sock_no_open, | |
6038f373 | 501 | .llseek = noop_llseek, |
1da177e4 LT |
502 | }; |
503 | ||
504 | /** | |
505 | * sock_release - close a socket | |
506 | * @sock: socket to close | |
507 | * | |
508 | * The socket is released from the protocol stack if it has a release | |
509 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 510 | * an inode not a file. |
1da177e4 | 511 | */ |
89bddce5 | 512 | |
1da177e4 LT |
513 | void sock_release(struct socket *sock) |
514 | { | |
515 | if (sock->ops) { | |
516 | struct module *owner = sock->ops->owner; | |
517 | ||
518 | sock->ops->release(sock); | |
519 | sock->ops = NULL; | |
520 | module_put(owner); | |
521 | } | |
522 | ||
eaefd110 | 523 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
1da177e4 LT |
524 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
525 | ||
b09e786b MP |
526 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
527 | return; | |
528 | ||
19e8d69c | 529 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
530 | if (!sock->file) { |
531 | iput(SOCK_INODE(sock)); | |
532 | return; | |
533 | } | |
89bddce5 | 534 | sock->file = NULL; |
1da177e4 | 535 | } |
c6d409cf | 536 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 537 | |
2244d07b | 538 | int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 539 | { |
2244d07b | 540 | *tx_flags = 0; |
20d49473 | 541 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 542 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 543 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 544 | *tx_flags |= SKBTX_SW_TSTAMP; |
6e3e939f JB |
545 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
546 | *tx_flags |= SKBTX_WIFI_STATUS; | |
20d49473 PO |
547 | return 0; |
548 | } | |
549 | EXPORT_SYMBOL(sock_tx_timestamp); | |
550 | ||
228e548e AB |
551 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
552 | struct msghdr *msg, size_t size) | |
1da177e4 LT |
553 | { |
554 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
1da177e4 | 555 | |
f8451725 HX |
556 | sock_update_classid(sock->sk); |
557 | ||
1da177e4 LT |
558 | si->sock = sock; |
559 | si->scm = NULL; | |
560 | si->msg = msg; | |
561 | si->size = size; | |
562 | ||
1da177e4 LT |
563 | return sock->ops->sendmsg(iocb, sock, msg, size); |
564 | } | |
565 | ||
228e548e AB |
566 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
567 | struct msghdr *msg, size_t size) | |
568 | { | |
569 | int err = security_socket_sendmsg(sock, msg, size); | |
570 | ||
571 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
572 | } | |
573 | ||
1da177e4 LT |
574 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
575 | { | |
576 | struct kiocb iocb; | |
577 | struct sock_iocb siocb; | |
578 | int ret; | |
579 | ||
580 | init_sync_kiocb(&iocb, NULL); | |
581 | iocb.private = &siocb; | |
582 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
583 | if (-EIOCBQUEUED == ret) | |
584 | ret = wait_on_sync_kiocb(&iocb); | |
585 | return ret; | |
586 | } | |
c6d409cf | 587 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 | 588 | |
894dc24c | 589 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
228e548e AB |
590 | { |
591 | struct kiocb iocb; | |
592 | struct sock_iocb siocb; | |
593 | int ret; | |
594 | ||
595 | init_sync_kiocb(&iocb, NULL); | |
596 | iocb.private = &siocb; | |
597 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
598 | if (-EIOCBQUEUED == ret) | |
599 | ret = wait_on_sync_kiocb(&iocb); | |
600 | return ret; | |
601 | } | |
602 | ||
1da177e4 LT |
603 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
604 | struct kvec *vec, size_t num, size_t size) | |
605 | { | |
606 | mm_segment_t oldfs = get_fs(); | |
607 | int result; | |
608 | ||
609 | set_fs(KERNEL_DS); | |
610 | /* | |
611 | * the following is safe, since for compiler definitions of kvec and | |
612 | * iovec are identical, yielding the same in-core layout and alignment | |
613 | */ | |
89bddce5 | 614 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
615 | msg->msg_iovlen = num; |
616 | result = sock_sendmsg(sock, msg, size); | |
617 | set_fs(oldfs); | |
618 | return result; | |
619 | } | |
c6d409cf | 620 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 621 | |
20d49473 PO |
622 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
623 | { | |
624 | if (kt.tv64) { | |
625 | *ts = ktime_to_timespec(kt); | |
626 | return 1; | |
627 | } else { | |
628 | return 0; | |
629 | } | |
630 | } | |
631 | ||
92f37fd2 ED |
632 | /* |
633 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
634 | */ | |
635 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
636 | struct sk_buff *skb) | |
637 | { | |
20d49473 PO |
638 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
639 | struct timespec ts[3]; | |
640 | int empty = 1; | |
641 | struct skb_shared_hwtstamps *shhwtstamps = | |
642 | skb_hwtstamps(skb); | |
643 | ||
644 | /* Race occurred between timestamp enabling and packet | |
645 | receiving. Fill in the current time for now. */ | |
646 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
647 | __net_timestamp(skb); | |
648 | ||
649 | if (need_software_tstamp) { | |
650 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
651 | struct timeval tv; | |
652 | skb_get_timestamp(skb, &tv); | |
653 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
654 | sizeof(tv), &tv); | |
655 | } else { | |
842509b8 | 656 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 657 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 658 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
659 | } |
660 | } | |
661 | ||
662 | ||
663 | memset(ts, 0, sizeof(ts)); | |
664 | if (skb->tstamp.tv64 && | |
665 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
666 | skb_get_timestampns(skb, ts + 0); | |
667 | empty = 0; | |
668 | } | |
669 | if (shhwtstamps) { | |
670 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
671 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
672 | empty = 0; | |
673 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
674 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
675 | empty = 0; | |
92f37fd2 | 676 | } |
20d49473 PO |
677 | if (!empty) |
678 | put_cmsg(msg, SOL_SOCKET, | |
679 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 680 | } |
7c81fd8b ACM |
681 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
682 | ||
6e3e939f JB |
683 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
684 | struct sk_buff *skb) | |
685 | { | |
686 | int ack; | |
687 | ||
688 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
689 | return; | |
690 | if (!skb->wifi_acked_valid) | |
691 | return; | |
692 | ||
693 | ack = skb->wifi_acked; | |
694 | ||
695 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
696 | } | |
697 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
698 | ||
11165f14 | 699 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
700 | struct sk_buff *skb) | |
3b885787 NH |
701 | { |
702 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
703 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
704 | sizeof(__u32), &skb->dropcount); | |
705 | } | |
706 | ||
767dd033 | 707 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
708 | struct sk_buff *skb) |
709 | { | |
710 | sock_recv_timestamp(msg, sk, skb); | |
711 | sock_recv_drops(msg, sk, skb); | |
712 | } | |
767dd033 | 713 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 714 | |
a2e27255 ACM |
715 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
716 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 717 | { |
1da177e4 LT |
718 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
719 | ||
f8451725 HX |
720 | sock_update_classid(sock->sk); |
721 | ||
1da177e4 LT |
722 | si->sock = sock; |
723 | si->scm = NULL; | |
724 | si->msg = msg; | |
725 | si->size = size; | |
726 | si->flags = flags; | |
727 | ||
1da177e4 LT |
728 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
729 | } | |
730 | ||
a2e27255 ACM |
731 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
732 | struct msghdr *msg, size_t size, int flags) | |
733 | { | |
734 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
735 | ||
736 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
737 | } | |
738 | ||
89bddce5 | 739 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
740 | size_t size, int flags) |
741 | { | |
742 | struct kiocb iocb; | |
743 | struct sock_iocb siocb; | |
744 | int ret; | |
745 | ||
89bddce5 | 746 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
747 | iocb.private = &siocb; |
748 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
749 | if (-EIOCBQUEUED == ret) | |
750 | ret = wait_on_sync_kiocb(&iocb); | |
751 | return ret; | |
752 | } | |
c6d409cf | 753 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 754 | |
a2e27255 ACM |
755 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
756 | size_t size, int flags) | |
757 | { | |
758 | struct kiocb iocb; | |
759 | struct sock_iocb siocb; | |
760 | int ret; | |
761 | ||
762 | init_sync_kiocb(&iocb, NULL); | |
763 | iocb.private = &siocb; | |
764 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
765 | if (-EIOCBQUEUED == ret) | |
766 | ret = wait_on_sync_kiocb(&iocb); | |
767 | return ret; | |
768 | } | |
769 | ||
c1249c0a ML |
770 | /** |
771 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
772 | * @sock: The socket to receive the message from | |
773 | * @msg: Received message | |
774 | * @vec: Input s/g array for message data | |
775 | * @num: Size of input s/g array | |
776 | * @size: Number of bytes to read | |
777 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
778 | * | |
779 | * On return the msg structure contains the scatter/gather array passed in the | |
780 | * vec argument. The array is modified so that it consists of the unfilled | |
781 | * portion of the original array. | |
782 | * | |
783 | * The returned value is the total number of bytes received, or an error. | |
784 | */ | |
89bddce5 SH |
785 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
786 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
787 | { |
788 | mm_segment_t oldfs = get_fs(); | |
789 | int result; | |
790 | ||
791 | set_fs(KERNEL_DS); | |
792 | /* | |
793 | * the following is safe, since for compiler definitions of kvec and | |
794 | * iovec are identical, yielding the same in-core layout and alignment | |
795 | */ | |
89bddce5 | 796 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
797 | result = sock_recvmsg(sock, msg, size, flags); |
798 | set_fs(oldfs); | |
799 | return result; | |
800 | } | |
c6d409cf | 801 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 LT |
802 | |
803 | static void sock_aio_dtor(struct kiocb *iocb) | |
804 | { | |
805 | kfree(iocb->private); | |
806 | } | |
807 | ||
ce1d4d3e CH |
808 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
809 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 810 | { |
1da177e4 LT |
811 | struct socket *sock; |
812 | int flags; | |
813 | ||
ce1d4d3e CH |
814 | sock = file->private_data; |
815 | ||
35f9c09f ED |
816 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
817 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
818 | flags |= more; | |
ce1d4d3e | 819 | |
e6949583 | 820 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 821 | } |
1da177e4 | 822 | |
9c55e01c | 823 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 824 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
825 | unsigned int flags) |
826 | { | |
827 | struct socket *sock = file->private_data; | |
828 | ||
997b37da RDC |
829 | if (unlikely(!sock->ops->splice_read)) |
830 | return -EINVAL; | |
831 | ||
f8451725 HX |
832 | sock_update_classid(sock->sk); |
833 | ||
9c55e01c JA |
834 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
835 | } | |
836 | ||
ce1d4d3e | 837 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 838 | struct sock_iocb *siocb) |
ce1d4d3e CH |
839 | { |
840 | if (!is_sync_kiocb(iocb)) { | |
841 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
842 | if (!siocb) | |
843 | return NULL; | |
1da177e4 LT |
844 | iocb->ki_dtor = sock_aio_dtor; |
845 | } | |
1da177e4 | 846 | |
ce1d4d3e | 847 | siocb->kiocb = iocb; |
ce1d4d3e CH |
848 | iocb->private = siocb; |
849 | return siocb; | |
1da177e4 LT |
850 | } |
851 | ||
ce1d4d3e | 852 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
853 | struct file *file, const struct iovec *iov, |
854 | unsigned long nr_segs) | |
ce1d4d3e CH |
855 | { |
856 | struct socket *sock = file->private_data; | |
857 | size_t size = 0; | |
858 | int i; | |
1da177e4 | 859 | |
89bddce5 SH |
860 | for (i = 0; i < nr_segs; i++) |
861 | size += iov[i].iov_len; | |
1da177e4 | 862 | |
ce1d4d3e CH |
863 | msg->msg_name = NULL; |
864 | msg->msg_namelen = 0; | |
865 | msg->msg_control = NULL; | |
866 | msg->msg_controllen = 0; | |
89bddce5 | 867 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
868 | msg->msg_iovlen = nr_segs; |
869 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
870 | ||
871 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
872 | } | |
873 | ||
027445c3 BP |
874 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
875 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
876 | { |
877 | struct sock_iocb siocb, *x; | |
878 | ||
1da177e4 LT |
879 | if (pos != 0) |
880 | return -ESPIPE; | |
027445c3 BP |
881 | |
882 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
883 | return 0; |
884 | ||
027445c3 BP |
885 | |
886 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
887 | if (!x) |
888 | return -ENOMEM; | |
027445c3 | 889 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
890 | } |
891 | ||
ce1d4d3e | 892 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
893 | struct file *file, const struct iovec *iov, |
894 | unsigned long nr_segs) | |
1da177e4 | 895 | { |
ce1d4d3e CH |
896 | struct socket *sock = file->private_data; |
897 | size_t size = 0; | |
898 | int i; | |
1da177e4 | 899 | |
89bddce5 SH |
900 | for (i = 0; i < nr_segs; i++) |
901 | size += iov[i].iov_len; | |
1da177e4 | 902 | |
ce1d4d3e CH |
903 | msg->msg_name = NULL; |
904 | msg->msg_namelen = 0; | |
905 | msg->msg_control = NULL; | |
906 | msg->msg_controllen = 0; | |
89bddce5 | 907 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
908 | msg->msg_iovlen = nr_segs; |
909 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
910 | if (sock->type == SOCK_SEQPACKET) | |
911 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 912 | |
ce1d4d3e | 913 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
914 | } |
915 | ||
027445c3 BP |
916 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
917 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
918 | { |
919 | struct sock_iocb siocb, *x; | |
1da177e4 | 920 | |
ce1d4d3e CH |
921 | if (pos != 0) |
922 | return -ESPIPE; | |
027445c3 | 923 | |
027445c3 | 924 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
925 | if (!x) |
926 | return -ENOMEM; | |
1da177e4 | 927 | |
027445c3 | 928 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
929 | } |
930 | ||
1da177e4 LT |
931 | /* |
932 | * Atomic setting of ioctl hooks to avoid race | |
933 | * with module unload. | |
934 | */ | |
935 | ||
4a3e2f71 | 936 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 937 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 938 | |
881d966b | 939 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 940 | { |
4a3e2f71 | 941 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 942 | br_ioctl_hook = hook; |
4a3e2f71 | 943 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
944 | } |
945 | EXPORT_SYMBOL(brioctl_set); | |
946 | ||
4a3e2f71 | 947 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 948 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 949 | |
881d966b | 950 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 951 | { |
4a3e2f71 | 952 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 953 | vlan_ioctl_hook = hook; |
4a3e2f71 | 954 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
955 | } |
956 | EXPORT_SYMBOL(vlan_ioctl_set); | |
957 | ||
4a3e2f71 | 958 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 959 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 960 | |
89bddce5 | 961 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 962 | { |
4a3e2f71 | 963 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 964 | dlci_ioctl_hook = hook; |
4a3e2f71 | 965 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
966 | } |
967 | EXPORT_SYMBOL(dlci_ioctl_set); | |
968 | ||
6b96018b AB |
969 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
970 | unsigned int cmd, unsigned long arg) | |
971 | { | |
972 | int err; | |
973 | void __user *argp = (void __user *)arg; | |
974 | ||
975 | err = sock->ops->ioctl(sock, cmd, arg); | |
976 | ||
977 | /* | |
978 | * If this ioctl is unknown try to hand it down | |
979 | * to the NIC driver. | |
980 | */ | |
981 | if (err == -ENOIOCTLCMD) | |
982 | err = dev_ioctl(net, cmd, argp); | |
983 | ||
984 | return err; | |
985 | } | |
986 | ||
1da177e4 LT |
987 | /* |
988 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
989 | * what to do with it - that's up to the protocol still. | |
990 | */ | |
991 | ||
992 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
993 | { | |
994 | struct socket *sock; | |
881d966b | 995 | struct sock *sk; |
1da177e4 LT |
996 | void __user *argp = (void __user *)arg; |
997 | int pid, err; | |
881d966b | 998 | struct net *net; |
1da177e4 | 999 | |
b69aee04 | 1000 | sock = file->private_data; |
881d966b | 1001 | sk = sock->sk; |
3b1e0a65 | 1002 | net = sock_net(sk); |
1da177e4 | 1003 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1004 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1005 | } else |
3d23e349 | 1006 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1007 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1008 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1009 | } else |
3d23e349 | 1010 | #endif |
89bddce5 | 1011 | switch (cmd) { |
1da177e4 LT |
1012 | case FIOSETOWN: |
1013 | case SIOCSPGRP: | |
1014 | err = -EFAULT; | |
1015 | if (get_user(pid, (int __user *)argp)) | |
1016 | break; | |
1017 | err = f_setown(sock->file, pid, 1); | |
1018 | break; | |
1019 | case FIOGETOWN: | |
1020 | case SIOCGPGRP: | |
609d7fa9 | 1021 | err = put_user(f_getown(sock->file), |
89bddce5 | 1022 | (int __user *)argp); |
1da177e4 LT |
1023 | break; |
1024 | case SIOCGIFBR: | |
1025 | case SIOCSIFBR: | |
1026 | case SIOCBRADDBR: | |
1027 | case SIOCBRDELBR: | |
1028 | err = -ENOPKG; | |
1029 | if (!br_ioctl_hook) | |
1030 | request_module("bridge"); | |
1031 | ||
4a3e2f71 | 1032 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1033 | if (br_ioctl_hook) |
881d966b | 1034 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1035 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1036 | break; |
1037 | case SIOCGIFVLAN: | |
1038 | case SIOCSIFVLAN: | |
1039 | err = -ENOPKG; | |
1040 | if (!vlan_ioctl_hook) | |
1041 | request_module("8021q"); | |
1042 | ||
4a3e2f71 | 1043 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1044 | if (vlan_ioctl_hook) |
881d966b | 1045 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1046 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1047 | break; |
1da177e4 LT |
1048 | case SIOCADDDLCI: |
1049 | case SIOCDELDLCI: | |
1050 | err = -ENOPKG; | |
1051 | if (!dlci_ioctl_hook) | |
1052 | request_module("dlci"); | |
1053 | ||
7512cbf6 PE |
1054 | mutex_lock(&dlci_ioctl_mutex); |
1055 | if (dlci_ioctl_hook) | |
1da177e4 | 1056 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1057 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1058 | break; |
1059 | default: | |
6b96018b | 1060 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1061 | break; |
89bddce5 | 1062 | } |
1da177e4 LT |
1063 | return err; |
1064 | } | |
1065 | ||
1066 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1067 | { | |
1068 | int err; | |
1069 | struct socket *sock = NULL; | |
89bddce5 | 1070 | |
1da177e4 LT |
1071 | err = security_socket_create(family, type, protocol, 1); |
1072 | if (err) | |
1073 | goto out; | |
1074 | ||
1075 | sock = sock_alloc(); | |
1076 | if (!sock) { | |
1077 | err = -ENOMEM; | |
1078 | goto out; | |
1079 | } | |
1080 | ||
1da177e4 | 1081 | sock->type = type; |
7420ed23 VY |
1082 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1083 | if (err) | |
1084 | goto out_release; | |
1085 | ||
1da177e4 LT |
1086 | out: |
1087 | *res = sock; | |
1088 | return err; | |
7420ed23 VY |
1089 | out_release: |
1090 | sock_release(sock); | |
1091 | sock = NULL; | |
1092 | goto out; | |
1da177e4 | 1093 | } |
c6d409cf | 1094 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1095 | |
1096 | /* No kernel lock held - perfect */ | |
89bddce5 | 1097 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1098 | { |
1099 | struct socket *sock; | |
1100 | ||
1101 | /* | |
89bddce5 | 1102 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1103 | */ |
b69aee04 | 1104 | sock = file->private_data; |
1da177e4 LT |
1105 | return sock->ops->poll(file, sock, wait); |
1106 | } | |
1107 | ||
89bddce5 | 1108 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1109 | { |
b69aee04 | 1110 | struct socket *sock = file->private_data; |
1da177e4 LT |
1111 | |
1112 | return sock->ops->mmap(file, sock, vma); | |
1113 | } | |
1114 | ||
20380731 | 1115 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1116 | { |
1117 | /* | |
89bddce5 SH |
1118 | * It was possible the inode is NULL we were |
1119 | * closing an unfinished socket. | |
1da177e4 LT |
1120 | */ |
1121 | ||
89bddce5 | 1122 | if (!inode) { |
1da177e4 LT |
1123 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1124 | return 0; | |
1125 | } | |
1da177e4 LT |
1126 | sock_release(SOCKET_I(inode)); |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * Update the socket async list | |
1132 | * | |
1133 | * Fasync_list locking strategy. | |
1134 | * | |
1135 | * 1. fasync_list is modified only under process context socket lock | |
1136 | * i.e. under semaphore. | |
1137 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1138 | * or under socket lock |
1da177e4 LT |
1139 | */ |
1140 | ||
1141 | static int sock_fasync(int fd, struct file *filp, int on) | |
1142 | { | |
989a2979 ED |
1143 | struct socket *sock = filp->private_data; |
1144 | struct sock *sk = sock->sk; | |
eaefd110 | 1145 | struct socket_wq *wq; |
1da177e4 | 1146 | |
989a2979 | 1147 | if (sk == NULL) |
1da177e4 | 1148 | return -EINVAL; |
1da177e4 LT |
1149 | |
1150 | lock_sock(sk); | |
eaefd110 ED |
1151 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1152 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1153 | |
eaefd110 | 1154 | if (!wq->fasync_list) |
989a2979 ED |
1155 | sock_reset_flag(sk, SOCK_FASYNC); |
1156 | else | |
bcdce719 | 1157 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1158 | |
989a2979 | 1159 | release_sock(sk); |
1da177e4 LT |
1160 | return 0; |
1161 | } | |
1162 | ||
43815482 | 1163 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1164 | |
1165 | int sock_wake_async(struct socket *sock, int how, int band) | |
1166 | { | |
43815482 ED |
1167 | struct socket_wq *wq; |
1168 | ||
1169 | if (!sock) | |
1170 | return -1; | |
1171 | rcu_read_lock(); | |
1172 | wq = rcu_dereference(sock->wq); | |
1173 | if (!wq || !wq->fasync_list) { | |
1174 | rcu_read_unlock(); | |
1da177e4 | 1175 | return -1; |
43815482 | 1176 | } |
89bddce5 | 1177 | switch (how) { |
8d8ad9d7 | 1178 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1179 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1180 | break; | |
1181 | goto call_kill; | |
8d8ad9d7 | 1182 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1183 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1184 | break; | |
1185 | /* fall through */ | |
8d8ad9d7 | 1186 | case SOCK_WAKE_IO: |
89bddce5 | 1187 | call_kill: |
43815482 | 1188 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1189 | break; |
8d8ad9d7 | 1190 | case SOCK_WAKE_URG: |
43815482 | 1191 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1192 | } |
43815482 | 1193 | rcu_read_unlock(); |
1da177e4 LT |
1194 | return 0; |
1195 | } | |
c6d409cf | 1196 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1197 | |
721db93a | 1198 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1199 | struct socket **res, int kern) |
1da177e4 LT |
1200 | { |
1201 | int err; | |
1202 | struct socket *sock; | |
55737fda | 1203 | const struct net_proto_family *pf; |
1da177e4 LT |
1204 | |
1205 | /* | |
89bddce5 | 1206 | * Check protocol is in range |
1da177e4 LT |
1207 | */ |
1208 | if (family < 0 || family >= NPROTO) | |
1209 | return -EAFNOSUPPORT; | |
1210 | if (type < 0 || type >= SOCK_MAX) | |
1211 | return -EINVAL; | |
1212 | ||
1213 | /* Compatibility. | |
1214 | ||
1215 | This uglymoron is moved from INET layer to here to avoid | |
1216 | deadlock in module load. | |
1217 | */ | |
1218 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1219 | static int warned; |
1da177e4 LT |
1220 | if (!warned) { |
1221 | warned = 1; | |
89bddce5 SH |
1222 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1223 | current->comm); | |
1da177e4 LT |
1224 | } |
1225 | family = PF_PACKET; | |
1226 | } | |
1227 | ||
1228 | err = security_socket_create(family, type, protocol, kern); | |
1229 | if (err) | |
1230 | return err; | |
89bddce5 | 1231 | |
55737fda SH |
1232 | /* |
1233 | * Allocate the socket and allow the family to set things up. if | |
1234 | * the protocol is 0, the family is instructed to select an appropriate | |
1235 | * default. | |
1236 | */ | |
1237 | sock = sock_alloc(); | |
1238 | if (!sock) { | |
e87cc472 | 1239 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1240 | return -ENFILE; /* Not exactly a match, but its the |
1241 | closest posix thing */ | |
1242 | } | |
1243 | ||
1244 | sock->type = type; | |
1245 | ||
95a5afca | 1246 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1247 | /* Attempt to load a protocol module if the find failed. |
1248 | * | |
1249 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1250 | * requested real, full-featured networking support upon configuration. |
1251 | * Otherwise module support will break! | |
1252 | */ | |
190683a9 | 1253 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1254 | request_module("net-pf-%d", family); |
1da177e4 LT |
1255 | #endif |
1256 | ||
55737fda SH |
1257 | rcu_read_lock(); |
1258 | pf = rcu_dereference(net_families[family]); | |
1259 | err = -EAFNOSUPPORT; | |
1260 | if (!pf) | |
1261 | goto out_release; | |
1da177e4 LT |
1262 | |
1263 | /* | |
1264 | * We will call the ->create function, that possibly is in a loadable | |
1265 | * module, so we have to bump that loadable module refcnt first. | |
1266 | */ | |
55737fda | 1267 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1268 | goto out_release; |
1269 | ||
55737fda SH |
1270 | /* Now protected by module ref count */ |
1271 | rcu_read_unlock(); | |
1272 | ||
3f378b68 | 1273 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1274 | if (err < 0) |
1da177e4 | 1275 | goto out_module_put; |
a79af59e | 1276 | |
1da177e4 LT |
1277 | /* |
1278 | * Now to bump the refcnt of the [loadable] module that owns this | |
1279 | * socket at sock_release time we decrement its refcnt. | |
1280 | */ | |
55737fda SH |
1281 | if (!try_module_get(sock->ops->owner)) |
1282 | goto out_module_busy; | |
1283 | ||
1da177e4 LT |
1284 | /* |
1285 | * Now that we're done with the ->create function, the [loadable] | |
1286 | * module can have its refcnt decremented | |
1287 | */ | |
55737fda | 1288 | module_put(pf->owner); |
7420ed23 VY |
1289 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1290 | if (err) | |
3b185525 | 1291 | goto out_sock_release; |
55737fda | 1292 | *res = sock; |
1da177e4 | 1293 | |
55737fda SH |
1294 | return 0; |
1295 | ||
1296 | out_module_busy: | |
1297 | err = -EAFNOSUPPORT; | |
1da177e4 | 1298 | out_module_put: |
55737fda SH |
1299 | sock->ops = NULL; |
1300 | module_put(pf->owner); | |
1301 | out_sock_release: | |
1da177e4 | 1302 | sock_release(sock); |
55737fda SH |
1303 | return err; |
1304 | ||
1305 | out_release: | |
1306 | rcu_read_unlock(); | |
1307 | goto out_sock_release; | |
1da177e4 | 1308 | } |
721db93a | 1309 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1310 | |
1311 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1312 | { | |
1b8d7ae4 | 1313 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1314 | } |
c6d409cf | 1315 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1316 | |
1317 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1318 | { | |
1b8d7ae4 | 1319 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1320 | } |
c6d409cf | 1321 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1322 | |
3e0fa65f | 1323 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1324 | { |
1325 | int retval; | |
1326 | struct socket *sock; | |
a677a039 UD |
1327 | int flags; |
1328 | ||
e38b36f3 UD |
1329 | /* Check the SOCK_* constants for consistency. */ |
1330 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1331 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1332 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1333 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1334 | ||
a677a039 | 1335 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1336 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1337 | return -EINVAL; |
1338 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1339 | |
aaca0bdc UD |
1340 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1341 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1342 | ||
1da177e4 LT |
1343 | retval = sock_create(family, type, protocol, &sock); |
1344 | if (retval < 0) | |
1345 | goto out; | |
1346 | ||
77d27200 | 1347 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1348 | if (retval < 0) |
1349 | goto out_release; | |
1350 | ||
1351 | out: | |
1352 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1353 | return retval; | |
1354 | ||
1355 | out_release: | |
1356 | sock_release(sock); | |
1357 | return retval; | |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | * Create a pair of connected sockets. | |
1362 | */ | |
1363 | ||
3e0fa65f HC |
1364 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1365 | int __user *, usockvec) | |
1da177e4 LT |
1366 | { |
1367 | struct socket *sock1, *sock2; | |
1368 | int fd1, fd2, err; | |
db349509 | 1369 | struct file *newfile1, *newfile2; |
a677a039 UD |
1370 | int flags; |
1371 | ||
1372 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1373 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1374 | return -EINVAL; |
1375 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1376 | |
aaca0bdc UD |
1377 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1378 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1379 | ||
1da177e4 LT |
1380 | /* |
1381 | * Obtain the first socket and check if the underlying protocol | |
1382 | * supports the socketpair call. | |
1383 | */ | |
1384 | ||
1385 | err = sock_create(family, type, protocol, &sock1); | |
1386 | if (err < 0) | |
1387 | goto out; | |
1388 | ||
1389 | err = sock_create(family, type, protocol, &sock2); | |
1390 | if (err < 0) | |
1391 | goto out_release_1; | |
1392 | ||
1393 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1394 | if (err < 0) |
1da177e4 LT |
1395 | goto out_release_both; |
1396 | ||
7cbe66b6 | 1397 | fd1 = sock_alloc_file(sock1, &newfile1, flags); |
bf3c23d1 DM |
1398 | if (unlikely(fd1 < 0)) { |
1399 | err = fd1; | |
db349509 | 1400 | goto out_release_both; |
bf3c23d1 | 1401 | } |
1da177e4 | 1402 | |
7cbe66b6 | 1403 | fd2 = sock_alloc_file(sock2, &newfile2, flags); |
198de4d7 AV |
1404 | if (unlikely(fd2 < 0)) { |
1405 | err = fd2; | |
1406 | fput(newfile1); | |
1407 | put_unused_fd(fd1); | |
1408 | sock_release(sock2); | |
1409 | goto out; | |
db349509 AV |
1410 | } |
1411 | ||
157cf649 | 1412 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1413 | fd_install(fd1, newfile1); |
1414 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1415 | /* fd1 and fd2 may be already another descriptors. |
1416 | * Not kernel problem. | |
1417 | */ | |
1418 | ||
89bddce5 | 1419 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1420 | if (!err) |
1421 | err = put_user(fd2, &usockvec[1]); | |
1422 | if (!err) | |
1423 | return 0; | |
1424 | ||
1425 | sys_close(fd2); | |
1426 | sys_close(fd1); | |
1427 | return err; | |
1428 | ||
1da177e4 | 1429 | out_release_both: |
89bddce5 | 1430 | sock_release(sock2); |
1da177e4 | 1431 | out_release_1: |
89bddce5 | 1432 | sock_release(sock1); |
1da177e4 LT |
1433 | out: |
1434 | return err; | |
1435 | } | |
1436 | ||
1da177e4 LT |
1437 | /* |
1438 | * Bind a name to a socket. Nothing much to do here since it's | |
1439 | * the protocol's responsibility to handle the local address. | |
1440 | * | |
1441 | * We move the socket address to kernel space before we call | |
1442 | * the protocol layer (having also checked the address is ok). | |
1443 | */ | |
1444 | ||
20f37034 | 1445 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1446 | { |
1447 | struct socket *sock; | |
230b1839 | 1448 | struct sockaddr_storage address; |
6cb153ca | 1449 | int err, fput_needed; |
1da177e4 | 1450 | |
89bddce5 | 1451 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1452 | if (sock) { |
43db362d | 1453 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1454 | if (err >= 0) { |
1455 | err = security_socket_bind(sock, | |
230b1839 | 1456 | (struct sockaddr *)&address, |
89bddce5 | 1457 | addrlen); |
6cb153ca BL |
1458 | if (!err) |
1459 | err = sock->ops->bind(sock, | |
89bddce5 | 1460 | (struct sockaddr *) |
230b1839 | 1461 | &address, addrlen); |
1da177e4 | 1462 | } |
6cb153ca | 1463 | fput_light(sock->file, fput_needed); |
89bddce5 | 1464 | } |
1da177e4 LT |
1465 | return err; |
1466 | } | |
1467 | ||
1da177e4 LT |
1468 | /* |
1469 | * Perform a listen. Basically, we allow the protocol to do anything | |
1470 | * necessary for a listen, and if that works, we mark the socket as | |
1471 | * ready for listening. | |
1472 | */ | |
1473 | ||
3e0fa65f | 1474 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1475 | { |
1476 | struct socket *sock; | |
6cb153ca | 1477 | int err, fput_needed; |
b8e1f9b5 | 1478 | int somaxconn; |
89bddce5 SH |
1479 | |
1480 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1481 | if (sock) { | |
8efa6e93 | 1482 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1483 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1484 | backlog = somaxconn; |
1da177e4 LT |
1485 | |
1486 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1487 | if (!err) |
1488 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1489 | |
6cb153ca | 1490 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1491 | } |
1492 | return err; | |
1493 | } | |
1494 | ||
1da177e4 LT |
1495 | /* |
1496 | * For accept, we attempt to create a new socket, set up the link | |
1497 | * with the client, wake up the client, then return the new | |
1498 | * connected fd. We collect the address of the connector in kernel | |
1499 | * space and move it to user at the very end. This is unclean because | |
1500 | * we open the socket then return an error. | |
1501 | * | |
1502 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1503 | * status to recvmsg. We need to add that support in a way thats | |
1504 | * clean when we restucture accept also. | |
1505 | */ | |
1506 | ||
20f37034 HC |
1507 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1508 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1509 | { |
1510 | struct socket *sock, *newsock; | |
39d8c1b6 | 1511 | struct file *newfile; |
6cb153ca | 1512 | int err, len, newfd, fput_needed; |
230b1839 | 1513 | struct sockaddr_storage address; |
1da177e4 | 1514 | |
77d27200 | 1515 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1516 | return -EINVAL; |
1517 | ||
1518 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1519 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1520 | ||
6cb153ca | 1521 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1522 | if (!sock) |
1523 | goto out; | |
1524 | ||
1525 | err = -ENFILE; | |
c6d409cf ED |
1526 | newsock = sock_alloc(); |
1527 | if (!newsock) | |
1da177e4 LT |
1528 | goto out_put; |
1529 | ||
1530 | newsock->type = sock->type; | |
1531 | newsock->ops = sock->ops; | |
1532 | ||
1da177e4 LT |
1533 | /* |
1534 | * We don't need try_module_get here, as the listening socket (sock) | |
1535 | * has the protocol module (sock->ops->owner) held. | |
1536 | */ | |
1537 | __module_get(newsock->ops->owner); | |
1538 | ||
7cbe66b6 | 1539 | newfd = sock_alloc_file(newsock, &newfile, flags); |
39d8c1b6 DM |
1540 | if (unlikely(newfd < 0)) { |
1541 | err = newfd; | |
9a1875e6 DM |
1542 | sock_release(newsock); |
1543 | goto out_put; | |
39d8c1b6 DM |
1544 | } |
1545 | ||
a79af59e FF |
1546 | err = security_socket_accept(sock, newsock); |
1547 | if (err) | |
39d8c1b6 | 1548 | goto out_fd; |
a79af59e | 1549 | |
1da177e4 LT |
1550 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1551 | if (err < 0) | |
39d8c1b6 | 1552 | goto out_fd; |
1da177e4 LT |
1553 | |
1554 | if (upeer_sockaddr) { | |
230b1839 | 1555 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1556 | &len, 2) < 0) { |
1da177e4 | 1557 | err = -ECONNABORTED; |
39d8c1b6 | 1558 | goto out_fd; |
1da177e4 | 1559 | } |
43db362d | 1560 | err = move_addr_to_user(&address, |
230b1839 | 1561 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1562 | if (err < 0) |
39d8c1b6 | 1563 | goto out_fd; |
1da177e4 LT |
1564 | } |
1565 | ||
1566 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1567 | ||
39d8c1b6 DM |
1568 | fd_install(newfd, newfile); |
1569 | err = newfd; | |
1da177e4 | 1570 | |
1da177e4 | 1571 | out_put: |
6cb153ca | 1572 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1573 | out: |
1574 | return err; | |
39d8c1b6 | 1575 | out_fd: |
9606a216 | 1576 | fput(newfile); |
39d8c1b6 | 1577 | put_unused_fd(newfd); |
1da177e4 LT |
1578 | goto out_put; |
1579 | } | |
1580 | ||
20f37034 HC |
1581 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1582 | int __user *, upeer_addrlen) | |
aaca0bdc | 1583 | { |
de11defe | 1584 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1585 | } |
1586 | ||
1da177e4 LT |
1587 | /* |
1588 | * Attempt to connect to a socket with the server address. The address | |
1589 | * is in user space so we verify it is OK and move it to kernel space. | |
1590 | * | |
1591 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1592 | * break bindings | |
1593 | * | |
1594 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1595 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1596 | * include the -EINPROGRESS status for such sockets. | |
1597 | */ | |
1598 | ||
20f37034 HC |
1599 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1600 | int, addrlen) | |
1da177e4 LT |
1601 | { |
1602 | struct socket *sock; | |
230b1839 | 1603 | struct sockaddr_storage address; |
6cb153ca | 1604 | int err, fput_needed; |
1da177e4 | 1605 | |
6cb153ca | 1606 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1607 | if (!sock) |
1608 | goto out; | |
43db362d | 1609 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1610 | if (err < 0) |
1611 | goto out_put; | |
1612 | ||
89bddce5 | 1613 | err = |
230b1839 | 1614 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1615 | if (err) |
1616 | goto out_put; | |
1617 | ||
230b1839 | 1618 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1619 | sock->file->f_flags); |
1620 | out_put: | |
6cb153ca | 1621 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1622 | out: |
1623 | return err; | |
1624 | } | |
1625 | ||
1626 | /* | |
1627 | * Get the local address ('name') of a socket object. Move the obtained | |
1628 | * name to user space. | |
1629 | */ | |
1630 | ||
20f37034 HC |
1631 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1632 | int __user *, usockaddr_len) | |
1da177e4 LT |
1633 | { |
1634 | struct socket *sock; | |
230b1839 | 1635 | struct sockaddr_storage address; |
6cb153ca | 1636 | int len, err, fput_needed; |
89bddce5 | 1637 | |
6cb153ca | 1638 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1639 | if (!sock) |
1640 | goto out; | |
1641 | ||
1642 | err = security_socket_getsockname(sock); | |
1643 | if (err) | |
1644 | goto out_put; | |
1645 | ||
230b1839 | 1646 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1647 | if (err) |
1648 | goto out_put; | |
43db362d | 1649 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1650 | |
1651 | out_put: | |
6cb153ca | 1652 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1653 | out: |
1654 | return err; | |
1655 | } | |
1656 | ||
1657 | /* | |
1658 | * Get the remote address ('name') of a socket object. Move the obtained | |
1659 | * name to user space. | |
1660 | */ | |
1661 | ||
20f37034 HC |
1662 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1663 | int __user *, usockaddr_len) | |
1da177e4 LT |
1664 | { |
1665 | struct socket *sock; | |
230b1839 | 1666 | struct sockaddr_storage address; |
6cb153ca | 1667 | int len, err, fput_needed; |
1da177e4 | 1668 | |
89bddce5 SH |
1669 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1670 | if (sock != NULL) { | |
1da177e4 LT |
1671 | err = security_socket_getpeername(sock); |
1672 | if (err) { | |
6cb153ca | 1673 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1674 | return err; |
1675 | } | |
1676 | ||
89bddce5 | 1677 | err = |
230b1839 | 1678 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1679 | 1); |
1da177e4 | 1680 | if (!err) |
43db362d | 1681 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1682 | usockaddr_len); |
6cb153ca | 1683 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1684 | } |
1685 | return err; | |
1686 | } | |
1687 | ||
1688 | /* | |
1689 | * Send a datagram to a given address. We move the address into kernel | |
1690 | * space and check the user space data area is readable before invoking | |
1691 | * the protocol. | |
1692 | */ | |
1693 | ||
3e0fa65f | 1694 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1695 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1696 | int, addr_len) |
1da177e4 LT |
1697 | { |
1698 | struct socket *sock; | |
230b1839 | 1699 | struct sockaddr_storage address; |
1da177e4 LT |
1700 | int err; |
1701 | struct msghdr msg; | |
1702 | struct iovec iov; | |
6cb153ca | 1703 | int fput_needed; |
6cb153ca | 1704 | |
253eacc0 LT |
1705 | if (len > INT_MAX) |
1706 | len = INT_MAX; | |
de0fa95c PE |
1707 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1708 | if (!sock) | |
4387ff75 | 1709 | goto out; |
6cb153ca | 1710 | |
89bddce5 SH |
1711 | iov.iov_base = buff; |
1712 | iov.iov_len = len; | |
1713 | msg.msg_name = NULL; | |
1714 | msg.msg_iov = &iov; | |
1715 | msg.msg_iovlen = 1; | |
1716 | msg.msg_control = NULL; | |
1717 | msg.msg_controllen = 0; | |
1718 | msg.msg_namelen = 0; | |
6cb153ca | 1719 | if (addr) { |
43db362d | 1720 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1721 | if (err < 0) |
1722 | goto out_put; | |
230b1839 | 1723 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1724 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1725 | } |
1726 | if (sock->file->f_flags & O_NONBLOCK) | |
1727 | flags |= MSG_DONTWAIT; | |
1728 | msg.msg_flags = flags; | |
1729 | err = sock_sendmsg(sock, &msg, len); | |
1730 | ||
89bddce5 | 1731 | out_put: |
de0fa95c | 1732 | fput_light(sock->file, fput_needed); |
4387ff75 | 1733 | out: |
1da177e4 LT |
1734 | return err; |
1735 | } | |
1736 | ||
1737 | /* | |
89bddce5 | 1738 | * Send a datagram down a socket. |
1da177e4 LT |
1739 | */ |
1740 | ||
3e0fa65f | 1741 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1742 | unsigned int, flags) |
1da177e4 LT |
1743 | { |
1744 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1745 | } | |
1746 | ||
1747 | /* | |
89bddce5 | 1748 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1749 | * sender. We verify the buffers are writable and if needed move the |
1750 | * sender address from kernel to user space. | |
1751 | */ | |
1752 | ||
3e0fa65f | 1753 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1754 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1755 | int __user *, addr_len) |
1da177e4 LT |
1756 | { |
1757 | struct socket *sock; | |
1758 | struct iovec iov; | |
1759 | struct msghdr msg; | |
230b1839 | 1760 | struct sockaddr_storage address; |
89bddce5 | 1761 | int err, err2; |
6cb153ca BL |
1762 | int fput_needed; |
1763 | ||
253eacc0 LT |
1764 | if (size > INT_MAX) |
1765 | size = INT_MAX; | |
de0fa95c | 1766 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1767 | if (!sock) |
de0fa95c | 1768 | goto out; |
1da177e4 | 1769 | |
89bddce5 SH |
1770 | msg.msg_control = NULL; |
1771 | msg.msg_controllen = 0; | |
1772 | msg.msg_iovlen = 1; | |
1773 | msg.msg_iov = &iov; | |
1774 | iov.iov_len = size; | |
1775 | iov.iov_base = ubuf; | |
230b1839 YH |
1776 | msg.msg_name = (struct sockaddr *)&address; |
1777 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1778 | if (sock->file->f_flags & O_NONBLOCK) |
1779 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1780 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1781 | |
89bddce5 | 1782 | if (err >= 0 && addr != NULL) { |
43db362d | 1783 | err2 = move_addr_to_user(&address, |
230b1839 | 1784 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1785 | if (err2 < 0) |
1786 | err = err2; | |
1da177e4 | 1787 | } |
de0fa95c PE |
1788 | |
1789 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1790 | out: |
1da177e4 LT |
1791 | return err; |
1792 | } | |
1793 | ||
1794 | /* | |
89bddce5 | 1795 | * Receive a datagram from a socket. |
1da177e4 LT |
1796 | */ |
1797 | ||
89bddce5 | 1798 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
95c96174 | 1799 | unsigned int flags) |
1da177e4 LT |
1800 | { |
1801 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1802 | } | |
1803 | ||
1804 | /* | |
1805 | * Set a socket option. Because we don't know the option lengths we have | |
1806 | * to pass the user mode parameter for the protocols to sort out. | |
1807 | */ | |
1808 | ||
20f37034 HC |
1809 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1810 | char __user *, optval, int, optlen) | |
1da177e4 | 1811 | { |
6cb153ca | 1812 | int err, fput_needed; |
1da177e4 LT |
1813 | struct socket *sock; |
1814 | ||
1815 | if (optlen < 0) | |
1816 | return -EINVAL; | |
89bddce5 SH |
1817 | |
1818 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1819 | if (sock != NULL) { | |
1820 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1821 | if (err) |
1822 | goto out_put; | |
1da177e4 LT |
1823 | |
1824 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1825 | err = |
1826 | sock_setsockopt(sock, level, optname, optval, | |
1827 | optlen); | |
1da177e4 | 1828 | else |
89bddce5 SH |
1829 | err = |
1830 | sock->ops->setsockopt(sock, level, optname, optval, | |
1831 | optlen); | |
6cb153ca BL |
1832 | out_put: |
1833 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1834 | } |
1835 | return err; | |
1836 | } | |
1837 | ||
1838 | /* | |
1839 | * Get a socket option. Because we don't know the option lengths we have | |
1840 | * to pass a user mode parameter for the protocols to sort out. | |
1841 | */ | |
1842 | ||
20f37034 HC |
1843 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1844 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1845 | { |
6cb153ca | 1846 | int err, fput_needed; |
1da177e4 LT |
1847 | struct socket *sock; |
1848 | ||
89bddce5 SH |
1849 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1850 | if (sock != NULL) { | |
6cb153ca BL |
1851 | err = security_socket_getsockopt(sock, level, optname); |
1852 | if (err) | |
1853 | goto out_put; | |
1da177e4 LT |
1854 | |
1855 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1856 | err = |
1857 | sock_getsockopt(sock, level, optname, optval, | |
1858 | optlen); | |
1da177e4 | 1859 | else |
89bddce5 SH |
1860 | err = |
1861 | sock->ops->getsockopt(sock, level, optname, optval, | |
1862 | optlen); | |
6cb153ca BL |
1863 | out_put: |
1864 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1865 | } |
1866 | return err; | |
1867 | } | |
1868 | ||
1da177e4 LT |
1869 | /* |
1870 | * Shutdown a socket. | |
1871 | */ | |
1872 | ||
754fe8d2 | 1873 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1874 | { |
6cb153ca | 1875 | int err, fput_needed; |
1da177e4 LT |
1876 | struct socket *sock; |
1877 | ||
89bddce5 SH |
1878 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1879 | if (sock != NULL) { | |
1da177e4 | 1880 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1881 | if (!err) |
1882 | err = sock->ops->shutdown(sock, how); | |
1883 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1884 | } |
1885 | return err; | |
1886 | } | |
1887 | ||
89bddce5 | 1888 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1889 | * fields which are the same type (int / unsigned) on our platforms. |
1890 | */ | |
1891 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1892 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1893 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1894 | ||
c71d8ebe TH |
1895 | struct used_address { |
1896 | struct sockaddr_storage name; | |
1897 | unsigned int name_len; | |
1898 | }; | |
1899 | ||
228e548e | 1900 | static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 1901 | struct msghdr *msg_sys, unsigned int flags, |
c71d8ebe | 1902 | struct used_address *used_address) |
1da177e4 | 1903 | { |
89bddce5 SH |
1904 | struct compat_msghdr __user *msg_compat = |
1905 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1906 | struct sockaddr_storage address; |
1da177e4 | 1907 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1908 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1909 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1910 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 | 1911 | unsigned char *ctl_buf = ctl; |
a74e9106 | 1912 | int err, ctl_len, total_len; |
89bddce5 | 1913 | |
1da177e4 LT |
1914 | err = -EFAULT; |
1915 | if (MSG_CMSG_COMPAT & flags) { | |
228e548e | 1916 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1917 | return -EFAULT; |
228e548e | 1918 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
1da177e4 LT |
1919 | return -EFAULT; |
1920 | ||
228e548e | 1921 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
1922 | err = -EMSGSIZE; |
1923 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
1924 | goto out; | |
1925 | err = -ENOMEM; | |
1926 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
1927 | GFP_KERNEL); | |
1da177e4 | 1928 | if (!iov) |
228e548e | 1929 | goto out; |
1da177e4 LT |
1930 | } |
1931 | ||
1932 | /* This will also move the address data into kernel space */ | |
1933 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 1934 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
1da177e4 | 1935 | } else |
43db362d | 1936 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
89bddce5 | 1937 | if (err < 0) |
1da177e4 LT |
1938 | goto out_freeiov; |
1939 | total_len = err; | |
1940 | ||
1941 | err = -ENOBUFS; | |
1942 | ||
228e548e | 1943 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 1944 | goto out_freeiov; |
228e548e | 1945 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 1946 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 1947 | err = |
228e548e | 1948 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 1949 | sizeof(ctl)); |
1da177e4 LT |
1950 | if (err) |
1951 | goto out_freeiov; | |
228e548e AB |
1952 | ctl_buf = msg_sys->msg_control; |
1953 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 1954 | } else if (ctl_len) { |
89bddce5 | 1955 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1956 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1957 | if (ctl_buf == NULL) |
1da177e4 LT |
1958 | goto out_freeiov; |
1959 | } | |
1960 | err = -EFAULT; | |
1961 | /* | |
228e548e | 1962 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
1963 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
1964 | * checking falls down on this. | |
1965 | */ | |
fb8621bb | 1966 | if (copy_from_user(ctl_buf, |
228e548e | 1967 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 1968 | ctl_len)) |
1da177e4 | 1969 | goto out_freectl; |
228e548e | 1970 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 1971 | } |
228e548e | 1972 | msg_sys->msg_flags = flags; |
1da177e4 LT |
1973 | |
1974 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 1975 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
1976 | /* |
1977 | * If this is sendmmsg() and current destination address is same as | |
1978 | * previously succeeded address, omit asking LSM's decision. | |
1979 | * used_address->name_len is initialized to UINT_MAX so that the first | |
1980 | * destination address never matches. | |
1981 | */ | |
bc909d9d MD |
1982 | if (used_address && msg_sys->msg_name && |
1983 | used_address->name_len == msg_sys->msg_namelen && | |
1984 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe TH |
1985 | used_address->name_len)) { |
1986 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
1987 | goto out_freectl; | |
1988 | } | |
1989 | err = sock_sendmsg(sock, msg_sys, total_len); | |
1990 | /* | |
1991 | * If this is sendmmsg() and sending to current destination address was | |
1992 | * successful, remember it. | |
1993 | */ | |
1994 | if (used_address && err >= 0) { | |
1995 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
1996 | if (msg_sys->msg_name) |
1997 | memcpy(&used_address->name, msg_sys->msg_name, | |
1998 | used_address->name_len); | |
c71d8ebe | 1999 | } |
1da177e4 LT |
2000 | |
2001 | out_freectl: | |
89bddce5 | 2002 | if (ctl_buf != ctl) |
1da177e4 LT |
2003 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2004 | out_freeiov: | |
2005 | if (iov != iovstack) | |
a74e9106 | 2006 | kfree(iov); |
228e548e AB |
2007 | out: |
2008 | return err; | |
2009 | } | |
2010 | ||
2011 | /* | |
2012 | * BSD sendmsg interface | |
2013 | */ | |
2014 | ||
95c96174 | 2015 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
228e548e AB |
2016 | { |
2017 | int fput_needed, err; | |
2018 | struct msghdr msg_sys; | |
2019 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2020 | ||
2021 | if (!sock) | |
2022 | goto out; | |
2023 | ||
c71d8ebe | 2024 | err = __sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
228e548e | 2025 | |
6cb153ca | 2026 | fput_light(sock->file, fput_needed); |
89bddce5 | 2027 | out: |
1da177e4 LT |
2028 | return err; |
2029 | } | |
2030 | ||
228e548e AB |
2031 | /* |
2032 | * Linux sendmmsg interface | |
2033 | */ | |
2034 | ||
2035 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2036 | unsigned int flags) | |
2037 | { | |
2038 | int fput_needed, err, datagrams; | |
2039 | struct socket *sock; | |
2040 | struct mmsghdr __user *entry; | |
2041 | struct compat_mmsghdr __user *compat_entry; | |
2042 | struct msghdr msg_sys; | |
c71d8ebe | 2043 | struct used_address used_address; |
228e548e | 2044 | |
98382f41 AB |
2045 | if (vlen > UIO_MAXIOV) |
2046 | vlen = UIO_MAXIOV; | |
228e548e AB |
2047 | |
2048 | datagrams = 0; | |
2049 | ||
2050 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2051 | if (!sock) | |
2052 | return err; | |
2053 | ||
c71d8ebe | 2054 | used_address.name_len = UINT_MAX; |
228e548e AB |
2055 | entry = mmsg; |
2056 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2057 | err = 0; |
228e548e AB |
2058 | |
2059 | while (datagrams < vlen) { | |
228e548e AB |
2060 | if (MSG_CMSG_COMPAT & flags) { |
2061 | err = __sys_sendmsg(sock, (struct msghdr __user *)compat_entry, | |
c71d8ebe | 2062 | &msg_sys, flags, &used_address); |
228e548e AB |
2063 | if (err < 0) |
2064 | break; | |
2065 | err = __put_user(err, &compat_entry->msg_len); | |
2066 | ++compat_entry; | |
2067 | } else { | |
2068 | err = __sys_sendmsg(sock, (struct msghdr __user *)entry, | |
c71d8ebe | 2069 | &msg_sys, flags, &used_address); |
228e548e AB |
2070 | if (err < 0) |
2071 | break; | |
2072 | err = put_user(err, &entry->msg_len); | |
2073 | ++entry; | |
2074 | } | |
2075 | ||
2076 | if (err) | |
2077 | break; | |
2078 | ++datagrams; | |
2079 | } | |
2080 | ||
228e548e AB |
2081 | fput_light(sock->file, fput_needed); |
2082 | ||
728ffb86 AB |
2083 | /* We only return an error if no datagrams were able to be sent */ |
2084 | if (datagrams != 0) | |
228e548e AB |
2085 | return datagrams; |
2086 | ||
228e548e AB |
2087 | return err; |
2088 | } | |
2089 | ||
2090 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2091 | unsigned int, vlen, unsigned int, flags) | |
2092 | { | |
2093 | return __sys_sendmmsg(fd, mmsg, vlen, flags); | |
2094 | } | |
2095 | ||
a2e27255 | 2096 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
95c96174 | 2097 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2098 | { |
89bddce5 SH |
2099 | struct compat_msghdr __user *msg_compat = |
2100 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2101 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2102 | struct iovec *iov = iovstack; |
1da177e4 | 2103 | unsigned long cmsg_ptr; |
a74e9106 | 2104 | int err, total_len, len; |
1da177e4 LT |
2105 | |
2106 | /* kernel mode address */ | |
230b1839 | 2107 | struct sockaddr_storage addr; |
1da177e4 LT |
2108 | |
2109 | /* user mode address pointers */ | |
2110 | struct sockaddr __user *uaddr; | |
2111 | int __user *uaddr_len; | |
89bddce5 | 2112 | |
1da177e4 | 2113 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 2114 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 2115 | return -EFAULT; |
c6d409cf | 2116 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 2117 | return -EFAULT; |
1da177e4 | 2118 | |
a2e27255 | 2119 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
a74e9106 ED |
2120 | err = -EMSGSIZE; |
2121 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2122 | goto out; | |
2123 | err = -ENOMEM; | |
2124 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2125 | GFP_KERNEL); | |
1da177e4 | 2126 | if (!iov) |
a2e27255 | 2127 | goto out; |
1da177e4 LT |
2128 | } |
2129 | ||
2130 | /* | |
89bddce5 SH |
2131 | * Save the user-mode address (verify_iovec will change the |
2132 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2133 | */ |
89bddce5 | 2134 | |
a2e27255 | 2135 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2136 | uaddr_len = COMPAT_NAMELEN(msg); |
2137 | if (MSG_CMSG_COMPAT & flags) { | |
43db362d | 2138 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 | 2139 | } else |
43db362d | 2140 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
1da177e4 LT |
2141 | if (err < 0) |
2142 | goto out_freeiov; | |
89bddce5 | 2143 | total_len = err; |
1da177e4 | 2144 | |
a2e27255 ACM |
2145 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2146 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2147 | |
1da177e4 LT |
2148 | if (sock->file->f_flags & O_NONBLOCK) |
2149 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2150 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2151 | total_len, flags); | |
1da177e4 LT |
2152 | if (err < 0) |
2153 | goto out_freeiov; | |
2154 | len = err; | |
2155 | ||
2156 | if (uaddr != NULL) { | |
43db362d | 2157 | err = move_addr_to_user(&addr, |
a2e27255 | 2158 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2159 | uaddr_len); |
1da177e4 LT |
2160 | if (err < 0) |
2161 | goto out_freeiov; | |
2162 | } | |
a2e27255 | 2163 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2164 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2165 | if (err) |
2166 | goto out_freeiov; | |
2167 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2168 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2169 | &msg_compat->msg_controllen); |
2170 | else | |
a2e27255 | 2171 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2172 | &msg->msg_controllen); |
2173 | if (err) | |
2174 | goto out_freeiov; | |
2175 | err = len; | |
2176 | ||
2177 | out_freeiov: | |
2178 | if (iov != iovstack) | |
a74e9106 | 2179 | kfree(iov); |
a2e27255 ACM |
2180 | out: |
2181 | return err; | |
2182 | } | |
2183 | ||
2184 | /* | |
2185 | * BSD recvmsg interface | |
2186 | */ | |
2187 | ||
2188 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2189 | unsigned int, flags) | |
2190 | { | |
2191 | int fput_needed, err; | |
2192 | struct msghdr msg_sys; | |
2193 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2194 | ||
2195 | if (!sock) | |
2196 | goto out; | |
2197 | ||
2198 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2199 | ||
6cb153ca | 2200 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2201 | out: |
2202 | return err; | |
2203 | } | |
2204 | ||
a2e27255 ACM |
2205 | /* |
2206 | * Linux recvmmsg interface | |
2207 | */ | |
2208 | ||
2209 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2210 | unsigned int flags, struct timespec *timeout) | |
2211 | { | |
2212 | int fput_needed, err, datagrams; | |
2213 | struct socket *sock; | |
2214 | struct mmsghdr __user *entry; | |
d7256d0e | 2215 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2216 | struct msghdr msg_sys; |
2217 | struct timespec end_time; | |
2218 | ||
2219 | if (timeout && | |
2220 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2221 | timeout->tv_nsec)) | |
2222 | return -EINVAL; | |
2223 | ||
2224 | datagrams = 0; | |
2225 | ||
2226 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2227 | if (!sock) | |
2228 | return err; | |
2229 | ||
2230 | err = sock_error(sock->sk); | |
2231 | if (err) | |
2232 | goto out_put; | |
2233 | ||
2234 | entry = mmsg; | |
d7256d0e | 2235 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2236 | |
2237 | while (datagrams < vlen) { | |
2238 | /* | |
2239 | * No need to ask LSM for more than the first datagram. | |
2240 | */ | |
d7256d0e JMG |
2241 | if (MSG_CMSG_COMPAT & flags) { |
2242 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
b9eb8b87 AB |
2243 | &msg_sys, flags & ~MSG_WAITFORONE, |
2244 | datagrams); | |
d7256d0e JMG |
2245 | if (err < 0) |
2246 | break; | |
2247 | err = __put_user(err, &compat_entry->msg_len); | |
2248 | ++compat_entry; | |
2249 | } else { | |
2250 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
b9eb8b87 AB |
2251 | &msg_sys, flags & ~MSG_WAITFORONE, |
2252 | datagrams); | |
d7256d0e JMG |
2253 | if (err < 0) |
2254 | break; | |
2255 | err = put_user(err, &entry->msg_len); | |
2256 | ++entry; | |
2257 | } | |
2258 | ||
a2e27255 ACM |
2259 | if (err) |
2260 | break; | |
a2e27255 ACM |
2261 | ++datagrams; |
2262 | ||
71c5c159 BB |
2263 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2264 | if (flags & MSG_WAITFORONE) | |
2265 | flags |= MSG_DONTWAIT; | |
2266 | ||
a2e27255 ACM |
2267 | if (timeout) { |
2268 | ktime_get_ts(timeout); | |
2269 | *timeout = timespec_sub(end_time, *timeout); | |
2270 | if (timeout->tv_sec < 0) { | |
2271 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2272 | break; | |
2273 | } | |
2274 | ||
2275 | /* Timeout, return less than vlen datagrams */ | |
2276 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2277 | break; | |
2278 | } | |
2279 | ||
2280 | /* Out of band data, return right away */ | |
2281 | if (msg_sys.msg_flags & MSG_OOB) | |
2282 | break; | |
2283 | } | |
2284 | ||
2285 | out_put: | |
2286 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2287 | |
a2e27255 ACM |
2288 | if (err == 0) |
2289 | return datagrams; | |
2290 | ||
2291 | if (datagrams != 0) { | |
2292 | /* | |
2293 | * We may return less entries than requested (vlen) if the | |
2294 | * sock is non block and there aren't enough datagrams... | |
2295 | */ | |
2296 | if (err != -EAGAIN) { | |
2297 | /* | |
2298 | * ... or if recvmsg returns an error after we | |
2299 | * received some datagrams, where we record the | |
2300 | * error to return on the next call or if the | |
2301 | * app asks about it using getsockopt(SO_ERROR). | |
2302 | */ | |
2303 | sock->sk->sk_err = -err; | |
2304 | } | |
2305 | ||
2306 | return datagrams; | |
2307 | } | |
2308 | ||
2309 | return err; | |
2310 | } | |
2311 | ||
2312 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2313 | unsigned int, vlen, unsigned int, flags, | |
2314 | struct timespec __user *, timeout) | |
2315 | { | |
2316 | int datagrams; | |
2317 | struct timespec timeout_sys; | |
2318 | ||
2319 | if (!timeout) | |
2320 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2321 | ||
2322 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2323 | return -EFAULT; | |
2324 | ||
2325 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2326 | ||
2327 | if (datagrams > 0 && | |
2328 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2329 | datagrams = -EFAULT; | |
2330 | ||
2331 | return datagrams; | |
2332 | } | |
2333 | ||
2334 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2335 | /* Argument list sizes for sys_socketcall */ |
2336 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2337 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2338 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2339 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2340 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2341 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2342 | }; |
2343 | ||
1da177e4 LT |
2344 | #undef AL |
2345 | ||
2346 | /* | |
89bddce5 | 2347 | * System call vectors. |
1da177e4 LT |
2348 | * |
2349 | * Argument checking cleaned up. Saved 20% in size. | |
2350 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2351 | * it is set by the callees. |
1da177e4 LT |
2352 | */ |
2353 | ||
3e0fa65f | 2354 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2355 | { |
2356 | unsigned long a[6]; | |
89bddce5 | 2357 | unsigned long a0, a1; |
1da177e4 | 2358 | int err; |
47379052 | 2359 | unsigned int len; |
1da177e4 | 2360 | |
228e548e | 2361 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2362 | return -EINVAL; |
2363 | ||
47379052 AV |
2364 | len = nargs[call]; |
2365 | if (len > sizeof(a)) | |
2366 | return -EINVAL; | |
2367 | ||
1da177e4 | 2368 | /* copy_from_user should be SMP safe. */ |
47379052 | 2369 | if (copy_from_user(a, args, len)) |
1da177e4 | 2370 | return -EFAULT; |
3ec3b2fb | 2371 | |
f3298dc4 | 2372 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2373 | |
89bddce5 SH |
2374 | a0 = a[0]; |
2375 | a1 = a[1]; | |
2376 | ||
2377 | switch (call) { | |
2378 | case SYS_SOCKET: | |
2379 | err = sys_socket(a0, a1, a[2]); | |
2380 | break; | |
2381 | case SYS_BIND: | |
2382 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2383 | break; | |
2384 | case SYS_CONNECT: | |
2385 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2386 | break; | |
2387 | case SYS_LISTEN: | |
2388 | err = sys_listen(a0, a1); | |
2389 | break; | |
2390 | case SYS_ACCEPT: | |
de11defe UD |
2391 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2392 | (int __user *)a[2], 0); | |
89bddce5 SH |
2393 | break; |
2394 | case SYS_GETSOCKNAME: | |
2395 | err = | |
2396 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2397 | (int __user *)a[2]); | |
2398 | break; | |
2399 | case SYS_GETPEERNAME: | |
2400 | err = | |
2401 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2402 | (int __user *)a[2]); | |
2403 | break; | |
2404 | case SYS_SOCKETPAIR: | |
2405 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2406 | break; | |
2407 | case SYS_SEND: | |
2408 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2409 | break; | |
2410 | case SYS_SENDTO: | |
2411 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2412 | (struct sockaddr __user *)a[4], a[5]); | |
2413 | break; | |
2414 | case SYS_RECV: | |
2415 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2416 | break; | |
2417 | case SYS_RECVFROM: | |
2418 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2419 | (struct sockaddr __user *)a[4], | |
2420 | (int __user *)a[5]); | |
2421 | break; | |
2422 | case SYS_SHUTDOWN: | |
2423 | err = sys_shutdown(a0, a1); | |
2424 | break; | |
2425 | case SYS_SETSOCKOPT: | |
2426 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2427 | break; | |
2428 | case SYS_GETSOCKOPT: | |
2429 | err = | |
2430 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2431 | (int __user *)a[4]); | |
2432 | break; | |
2433 | case SYS_SENDMSG: | |
2434 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2435 | break; | |
228e548e AB |
2436 | case SYS_SENDMMSG: |
2437 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2438 | break; | |
89bddce5 SH |
2439 | case SYS_RECVMSG: |
2440 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2441 | break; | |
a2e27255 ACM |
2442 | case SYS_RECVMMSG: |
2443 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2444 | (struct timespec __user *)a[4]); | |
2445 | break; | |
de11defe UD |
2446 | case SYS_ACCEPT4: |
2447 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2448 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2449 | break; |
89bddce5 SH |
2450 | default: |
2451 | err = -EINVAL; | |
2452 | break; | |
1da177e4 LT |
2453 | } |
2454 | return err; | |
2455 | } | |
2456 | ||
89bddce5 | 2457 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2458 | |
55737fda SH |
2459 | /** |
2460 | * sock_register - add a socket protocol handler | |
2461 | * @ops: description of protocol | |
2462 | * | |
1da177e4 LT |
2463 | * This function is called by a protocol handler that wants to |
2464 | * advertise its address family, and have it linked into the | |
55737fda SH |
2465 | * socket interface. The value ops->family coresponds to the |
2466 | * socket system call protocol family. | |
1da177e4 | 2467 | */ |
f0fd27d4 | 2468 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2469 | { |
2470 | int err; | |
2471 | ||
2472 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2473 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2474 | NPROTO); | |
1da177e4 LT |
2475 | return -ENOBUFS; |
2476 | } | |
55737fda SH |
2477 | |
2478 | spin_lock(&net_family_lock); | |
190683a9 ED |
2479 | if (rcu_dereference_protected(net_families[ops->family], |
2480 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2481 | err = -EEXIST; |
2482 | else { | |
cf778b00 | 2483 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2484 | err = 0; |
2485 | } | |
55737fda SH |
2486 | spin_unlock(&net_family_lock); |
2487 | ||
89bddce5 | 2488 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2489 | return err; |
2490 | } | |
c6d409cf | 2491 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2492 | |
55737fda SH |
2493 | /** |
2494 | * sock_unregister - remove a protocol handler | |
2495 | * @family: protocol family to remove | |
2496 | * | |
1da177e4 LT |
2497 | * This function is called by a protocol handler that wants to |
2498 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2499 | * new socket creation. |
2500 | * | |
2501 | * If protocol handler is a module, then it can use module reference | |
2502 | * counts to protect against new references. If protocol handler is not | |
2503 | * a module then it needs to provide its own protection in | |
2504 | * the ops->create routine. | |
1da177e4 | 2505 | */ |
f0fd27d4 | 2506 | void sock_unregister(int family) |
1da177e4 | 2507 | { |
f0fd27d4 | 2508 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2509 | |
55737fda | 2510 | spin_lock(&net_family_lock); |
a9b3cd7f | 2511 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2512 | spin_unlock(&net_family_lock); |
2513 | ||
2514 | synchronize_rcu(); | |
2515 | ||
89bddce5 | 2516 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2517 | } |
c6d409cf | 2518 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2519 | |
77d76ea3 | 2520 | static int __init sock_init(void) |
1da177e4 | 2521 | { |
b3e19d92 | 2522 | int err; |
2ca794e5 EB |
2523 | /* |
2524 | * Initialize the network sysctl infrastructure. | |
2525 | */ | |
2526 | err = net_sysctl_init(); | |
2527 | if (err) | |
2528 | goto out; | |
b3e19d92 | 2529 | |
1da177e4 | 2530 | /* |
89bddce5 | 2531 | * Initialize sock SLAB cache. |
1da177e4 | 2532 | */ |
89bddce5 | 2533 | |
1da177e4 LT |
2534 | sk_init(); |
2535 | ||
1da177e4 | 2536 | /* |
89bddce5 | 2537 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2538 | */ |
2539 | skb_init(); | |
1da177e4 LT |
2540 | |
2541 | /* | |
89bddce5 | 2542 | * Initialize the protocols module. |
1da177e4 LT |
2543 | */ |
2544 | ||
2545 | init_inodecache(); | |
b3e19d92 NP |
2546 | |
2547 | err = register_filesystem(&sock_fs_type); | |
2548 | if (err) | |
2549 | goto out_fs; | |
1da177e4 | 2550 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2551 | if (IS_ERR(sock_mnt)) { |
2552 | err = PTR_ERR(sock_mnt); | |
2553 | goto out_mount; | |
2554 | } | |
77d76ea3 AK |
2555 | |
2556 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2557 | */ |
2558 | ||
2559 | #ifdef CONFIG_NETFILTER | |
2560 | netfilter_init(); | |
2561 | #endif | |
cbeb321a | 2562 | |
c1f19b51 RC |
2563 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2564 | skb_timestamping_init(); | |
2565 | #endif | |
2566 | ||
b3e19d92 NP |
2567 | out: |
2568 | return err; | |
2569 | ||
2570 | out_mount: | |
2571 | unregister_filesystem(&sock_fs_type); | |
2572 | out_fs: | |
2573 | goto out; | |
1da177e4 LT |
2574 | } |
2575 | ||
77d76ea3 AK |
2576 | core_initcall(sock_init); /* early initcall */ |
2577 | ||
1da177e4 LT |
2578 | #ifdef CONFIG_PROC_FS |
2579 | void socket_seq_show(struct seq_file *seq) | |
2580 | { | |
2581 | int cpu; | |
2582 | int counter = 0; | |
2583 | ||
6f912042 | 2584 | for_each_possible_cpu(cpu) |
89bddce5 | 2585 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2586 | |
2587 | /* It can be negative, by the way. 8) */ | |
2588 | if (counter < 0) | |
2589 | counter = 0; | |
2590 | ||
2591 | seq_printf(seq, "sockets: used %d\n", counter); | |
2592 | } | |
89bddce5 | 2593 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2594 | |
89bbfc95 | 2595 | #ifdef CONFIG_COMPAT |
6b96018b | 2596 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2597 | unsigned int cmd, void __user *up) |
7a229387 | 2598 | { |
7a229387 AB |
2599 | mm_segment_t old_fs = get_fs(); |
2600 | struct timeval ktv; | |
2601 | int err; | |
2602 | ||
2603 | set_fs(KERNEL_DS); | |
6b96018b | 2604 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2605 | set_fs(old_fs); |
644595f8 | 2606 | if (!err) |
ed6fe9d6 | 2607 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2608 | |
7a229387 AB |
2609 | return err; |
2610 | } | |
2611 | ||
6b96018b | 2612 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2613 | unsigned int cmd, void __user *up) |
7a229387 | 2614 | { |
7a229387 AB |
2615 | mm_segment_t old_fs = get_fs(); |
2616 | struct timespec kts; | |
2617 | int err; | |
2618 | ||
2619 | set_fs(KERNEL_DS); | |
6b96018b | 2620 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2621 | set_fs(old_fs); |
644595f8 | 2622 | if (!err) |
ed6fe9d6 | 2623 | err = compat_put_timespec(&kts, up); |
644595f8 | 2624 | |
7a229387 AB |
2625 | return err; |
2626 | } | |
2627 | ||
6b96018b | 2628 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2629 | { |
2630 | struct ifreq __user *uifr; | |
2631 | int err; | |
2632 | ||
2633 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2634 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2635 | return -EFAULT; |
2636 | ||
6b96018b | 2637 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2638 | if (err) |
2639 | return err; | |
2640 | ||
6b96018b | 2641 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2642 | return -EFAULT; |
2643 | ||
2644 | return 0; | |
2645 | } | |
2646 | ||
6b96018b | 2647 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2648 | { |
6b96018b | 2649 | struct compat_ifconf ifc32; |
7a229387 AB |
2650 | struct ifconf ifc; |
2651 | struct ifconf __user *uifc; | |
6b96018b | 2652 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2653 | struct ifreq __user *ifr; |
2654 | unsigned int i, j; | |
2655 | int err; | |
2656 | ||
6b96018b | 2657 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2658 | return -EFAULT; |
2659 | ||
43da5f2e | 2660 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2661 | if (ifc32.ifcbuf == 0) { |
2662 | ifc32.ifc_len = 0; | |
2663 | ifc.ifc_len = 0; | |
2664 | ifc.ifc_req = NULL; | |
2665 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2666 | } else { | |
c6d409cf ED |
2667 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2668 | sizeof(struct ifreq); | |
7a229387 AB |
2669 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2670 | ifc.ifc_len = len; | |
2671 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2672 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2673 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2674 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2675 | return -EFAULT; |
2676 | ifr++; | |
2677 | ifr32++; | |
2678 | } | |
2679 | } | |
2680 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2681 | return -EFAULT; | |
2682 | ||
6b96018b | 2683 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2684 | if (err) |
2685 | return err; | |
2686 | ||
2687 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2688 | return -EFAULT; | |
2689 | ||
2690 | ifr = ifc.ifc_req; | |
2691 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2692 | for (i = 0, j = 0; | |
c6d409cf ED |
2693 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2694 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2695 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2696 | return -EFAULT; |
2697 | ifr32++; | |
2698 | ifr++; | |
2699 | } | |
2700 | ||
2701 | if (ifc32.ifcbuf == 0) { | |
2702 | /* Translate from 64-bit structure multiple to | |
2703 | * a 32-bit one. | |
2704 | */ | |
2705 | i = ifc.ifc_len; | |
6b96018b | 2706 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2707 | ifc32.ifc_len = i; |
2708 | } else { | |
2709 | ifc32.ifc_len = i; | |
2710 | } | |
6b96018b | 2711 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2712 | return -EFAULT; |
2713 | ||
2714 | return 0; | |
2715 | } | |
2716 | ||
6b96018b | 2717 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2718 | { |
3a7da39d BH |
2719 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2720 | bool convert_in = false, convert_out = false; | |
2721 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2722 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2723 | struct ifreq __user *ifr; |
3a7da39d BH |
2724 | u32 rule_cnt = 0, actual_rule_cnt; |
2725 | u32 ethcmd; | |
7a229387 | 2726 | u32 data; |
3a7da39d | 2727 | int ret; |
7a229387 | 2728 | |
3a7da39d BH |
2729 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2730 | return -EFAULT; | |
7a229387 | 2731 | |
3a7da39d BH |
2732 | compat_rxnfc = compat_ptr(data); |
2733 | ||
2734 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2735 | return -EFAULT; |
2736 | ||
3a7da39d BH |
2737 | /* Most ethtool structures are defined without padding. |
2738 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2739 | */ | |
2740 | switch (ethcmd) { | |
2741 | default: | |
2742 | break; | |
2743 | case ETHTOOL_GRXCLSRLALL: | |
2744 | /* Buffer size is variable */ | |
2745 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2746 | return -EFAULT; | |
2747 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2748 | return -ENOMEM; | |
2749 | buf_size += rule_cnt * sizeof(u32); | |
2750 | /* fall through */ | |
2751 | case ETHTOOL_GRXRINGS: | |
2752 | case ETHTOOL_GRXCLSRLCNT: | |
2753 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2754 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2755 | convert_out = true; |
2756 | /* fall through */ | |
2757 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2758 | buf_size += sizeof(struct ethtool_rxnfc); |
2759 | convert_in = true; | |
2760 | break; | |
2761 | } | |
2762 | ||
2763 | ifr = compat_alloc_user_space(buf_size); | |
2764 | rxnfc = (void *)ifr + ALIGN(sizeof(struct ifreq), 8); | |
2765 | ||
2766 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2767 | return -EFAULT; |
2768 | ||
3a7da39d BH |
2769 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2770 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2771 | return -EFAULT; |
2772 | ||
3a7da39d | 2773 | if (convert_in) { |
127fe533 | 2774 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2775 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2776 | */ | |
127fe533 AD |
2777 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2778 | sizeof(compat_rxnfc->fs.m_ext) != | |
2779 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2780 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2781 | BUILD_BUG_ON( |
2782 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2783 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2784 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2785 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2786 | ||
2787 | if (copy_in_user(rxnfc, compat_rxnfc, | |
127fe533 | 2788 | (void *)(&rxnfc->fs.m_ext + 1) - |
3a7da39d BH |
2789 | (void *)rxnfc) || |
2790 | copy_in_user(&rxnfc->fs.ring_cookie, | |
2791 | &compat_rxnfc->fs.ring_cookie, | |
2792 | (void *)(&rxnfc->fs.location + 1) - | |
2793 | (void *)&rxnfc->fs.ring_cookie) || | |
2794 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, | |
2795 | sizeof(rxnfc->rule_cnt))) | |
2796 | return -EFAULT; | |
2797 | } | |
2798 | ||
2799 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2800 | if (ret) | |
2801 | return ret; | |
2802 | ||
2803 | if (convert_out) { | |
2804 | if (copy_in_user(compat_rxnfc, rxnfc, | |
127fe533 | 2805 | (const void *)(&rxnfc->fs.m_ext + 1) - |
3a7da39d BH |
2806 | (const void *)rxnfc) || |
2807 | copy_in_user(&compat_rxnfc->fs.ring_cookie, | |
2808 | &rxnfc->fs.ring_cookie, | |
2809 | (const void *)(&rxnfc->fs.location + 1) - | |
2810 | (const void *)&rxnfc->fs.ring_cookie) || | |
2811 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, | |
2812 | sizeof(rxnfc->rule_cnt))) | |
2813 | return -EFAULT; | |
2814 | ||
2815 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2816 | /* As an optimisation, we only copy the actual | |
2817 | * number of rules that the underlying | |
2818 | * function returned. Since Mallory might | |
2819 | * change the rule count in user memory, we | |
2820 | * check that it is less than the rule count | |
2821 | * originally given (as the user buffer size), | |
2822 | * which has been range-checked. | |
2823 | */ | |
2824 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2825 | return -EFAULT; | |
2826 | if (actual_rule_cnt < rule_cnt) | |
2827 | rule_cnt = actual_rule_cnt; | |
2828 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2829 | &rxnfc->rule_locs[0], | |
2830 | rule_cnt * sizeof(u32))) | |
2831 | return -EFAULT; | |
2832 | } | |
2833 | } | |
2834 | ||
2835 | return 0; | |
7a229387 AB |
2836 | } |
2837 | ||
7a50a240 AB |
2838 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2839 | { | |
2840 | void __user *uptr; | |
2841 | compat_uptr_t uptr32; | |
2842 | struct ifreq __user *uifr; | |
2843 | ||
c6d409cf | 2844 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2845 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2846 | return -EFAULT; | |
2847 | ||
2848 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2849 | return -EFAULT; | |
2850 | ||
2851 | uptr = compat_ptr(uptr32); | |
2852 | ||
2853 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2854 | return -EFAULT; | |
2855 | ||
2856 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2857 | } | |
2858 | ||
6b96018b AB |
2859 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2860 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2861 | { |
2862 | struct ifreq kifr; | |
2863 | struct ifreq __user *uifr; | |
7a229387 AB |
2864 | mm_segment_t old_fs; |
2865 | int err; | |
2866 | u32 data; | |
2867 | void __user *datap; | |
2868 | ||
2869 | switch (cmd) { | |
2870 | case SIOCBONDENSLAVE: | |
2871 | case SIOCBONDRELEASE: | |
2872 | case SIOCBONDSETHWADDR: | |
2873 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2874 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2875 | return -EFAULT; |
2876 | ||
2877 | old_fs = get_fs(); | |
c6d409cf | 2878 | set_fs(KERNEL_DS); |
c3f52ae6 | 2879 | err = dev_ioctl(net, cmd, |
2880 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2881 | set_fs(old_fs); |
7a229387 AB |
2882 | |
2883 | return err; | |
2884 | case SIOCBONDSLAVEINFOQUERY: | |
2885 | case SIOCBONDINFOQUERY: | |
2886 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2887 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2888 | return -EFAULT; | |
2889 | ||
2890 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2891 | return -EFAULT; | |
2892 | ||
2893 | datap = compat_ptr(data); | |
2894 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2895 | return -EFAULT; | |
2896 | ||
6b96018b | 2897 | return dev_ioctl(net, cmd, uifr); |
7a229387 | 2898 | default: |
07d106d0 | 2899 | return -ENOIOCTLCMD; |
ccbd6a5a | 2900 | } |
7a229387 AB |
2901 | } |
2902 | ||
6b96018b AB |
2903 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2904 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2905 | { |
2906 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2907 | char tmp_buf[IFNAMSIZ]; |
2908 | void __user *data64; | |
2909 | u32 data32; | |
2910 | ||
2911 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2912 | IFNAMSIZ)) | |
2913 | return -EFAULT; | |
2914 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2915 | return -EFAULT; | |
2916 | data64 = compat_ptr(data32); | |
2917 | ||
2918 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2919 | ||
2920 | /* Don't check these user accesses, just let that get trapped | |
2921 | * in the ioctl handler instead. | |
2922 | */ | |
2923 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2924 | IFNAMSIZ)) | |
2925 | return -EFAULT; | |
2926 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2927 | return -EFAULT; | |
2928 | ||
6b96018b | 2929 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2930 | } |
2931 | ||
6b96018b AB |
2932 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2933 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2934 | { |
a2116ed2 | 2935 | struct ifreq __user *uifr; |
7a229387 AB |
2936 | int err; |
2937 | ||
a2116ed2 AB |
2938 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2939 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2940 | return -EFAULT; | |
2941 | ||
2942 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2943 | ||
7a229387 AB |
2944 | if (!err) { |
2945 | switch (cmd) { | |
2946 | case SIOCGIFFLAGS: | |
2947 | case SIOCGIFMETRIC: | |
2948 | case SIOCGIFMTU: | |
2949 | case SIOCGIFMEM: | |
2950 | case SIOCGIFHWADDR: | |
2951 | case SIOCGIFINDEX: | |
2952 | case SIOCGIFADDR: | |
2953 | case SIOCGIFBRDADDR: | |
2954 | case SIOCGIFDSTADDR: | |
2955 | case SIOCGIFNETMASK: | |
fab2532b | 2956 | case SIOCGIFPFLAGS: |
7a229387 | 2957 | case SIOCGIFTXQLEN: |
fab2532b AB |
2958 | case SIOCGMIIPHY: |
2959 | case SIOCGMIIREG: | |
a2116ed2 | 2960 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2961 | err = -EFAULT; |
2962 | break; | |
2963 | } | |
2964 | } | |
2965 | return err; | |
2966 | } | |
2967 | ||
a2116ed2 AB |
2968 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2969 | struct compat_ifreq __user *uifr32) | |
2970 | { | |
2971 | struct ifreq ifr; | |
2972 | struct compat_ifmap __user *uifmap32; | |
2973 | mm_segment_t old_fs; | |
2974 | int err; | |
2975 | ||
2976 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2977 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
2978 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2979 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2980 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2981 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2982 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2983 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
2984 | if (err) | |
2985 | return -EFAULT; | |
2986 | ||
2987 | old_fs = get_fs(); | |
c6d409cf | 2988 | set_fs(KERNEL_DS); |
c3f52ae6 | 2989 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 2990 | set_fs(old_fs); |
a2116ed2 AB |
2991 | |
2992 | if (cmd == SIOCGIFMAP && !err) { | |
2993 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
2994 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2995 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2996 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2997 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2998 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2999 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
3000 | if (err) | |
3001 | err = -EFAULT; | |
3002 | } | |
3003 | return err; | |
3004 | } | |
3005 | ||
3006 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
3007 | { | |
3008 | void __user *uptr; | |
3009 | compat_uptr_t uptr32; | |
3010 | struct ifreq __user *uifr; | |
3011 | ||
c6d409cf | 3012 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
a2116ed2 AB |
3013 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
3014 | return -EFAULT; | |
3015 | ||
3016 | if (get_user(uptr32, &uifr32->ifr_data)) | |
3017 | return -EFAULT; | |
3018 | ||
3019 | uptr = compat_ptr(uptr32); | |
3020 | ||
3021 | if (put_user(uptr, &uifr->ifr_data)) | |
3022 | return -EFAULT; | |
3023 | ||
3024 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
3025 | } | |
3026 | ||
7a229387 | 3027 | struct rtentry32 { |
c6d409cf | 3028 | u32 rt_pad1; |
7a229387 AB |
3029 | struct sockaddr rt_dst; /* target address */ |
3030 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3031 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3032 | unsigned short rt_flags; |
3033 | short rt_pad2; | |
3034 | u32 rt_pad3; | |
3035 | unsigned char rt_tos; | |
3036 | unsigned char rt_class; | |
3037 | short rt_pad4; | |
3038 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3039 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3040 | u32 rt_mtu; /* per route MTU/Window */ |
3041 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3042 | unsigned short rt_irtt; /* Initial RTT */ |
3043 | }; | |
3044 | ||
3045 | struct in6_rtmsg32 { | |
3046 | struct in6_addr rtmsg_dst; | |
3047 | struct in6_addr rtmsg_src; | |
3048 | struct in6_addr rtmsg_gateway; | |
3049 | u32 rtmsg_type; | |
3050 | u16 rtmsg_dst_len; | |
3051 | u16 rtmsg_src_len; | |
3052 | u32 rtmsg_metric; | |
3053 | u32 rtmsg_info; | |
3054 | u32 rtmsg_flags; | |
3055 | s32 rtmsg_ifindex; | |
3056 | }; | |
3057 | ||
6b96018b AB |
3058 | static int routing_ioctl(struct net *net, struct socket *sock, |
3059 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3060 | { |
3061 | int ret; | |
3062 | void *r = NULL; | |
3063 | struct in6_rtmsg r6; | |
3064 | struct rtentry r4; | |
3065 | char devname[16]; | |
3066 | u32 rtdev; | |
3067 | mm_segment_t old_fs = get_fs(); | |
3068 | ||
6b96018b AB |
3069 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3070 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3071 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3072 | 3 * sizeof(struct in6_addr)); |
c6d409cf ED |
3073 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3074 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3075 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3076 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3077 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3078 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3079 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3080 | |
3081 | r = (void *) &r6; | |
3082 | } else { /* ipv4 */ | |
6b96018b | 3083 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3084 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3085 | 3 * sizeof(struct sockaddr)); |
c6d409cf ED |
3086 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
3087 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3088 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3089 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
3090 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3091 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3092 | if (rtdev) { |
c6d409cf | 3093 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3094 | r4.rt_dev = (char __user __force *)devname; |
3095 | devname[15] = 0; | |
7a229387 AB |
3096 | } else |
3097 | r4.rt_dev = NULL; | |
3098 | ||
3099 | r = (void *) &r4; | |
3100 | } | |
3101 | ||
3102 | if (ret) { | |
3103 | ret = -EFAULT; | |
3104 | goto out; | |
3105 | } | |
3106 | ||
c6d409cf | 3107 | set_fs(KERNEL_DS); |
6b96018b | 3108 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3109 | set_fs(old_fs); |
7a229387 AB |
3110 | |
3111 | out: | |
7a229387 AB |
3112 | return ret; |
3113 | } | |
3114 | ||
3115 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3116 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3117 | * use compatible ioctls |
7a229387 | 3118 | */ |
6b96018b | 3119 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3120 | { |
6b96018b | 3121 | compat_ulong_t tmp; |
7a229387 | 3122 | |
6b96018b | 3123 | if (get_user(tmp, argp)) |
7a229387 AB |
3124 | return -EFAULT; |
3125 | if (tmp == BRCTL_GET_VERSION) | |
3126 | return BRCTL_VERSION + 1; | |
3127 | return -EINVAL; | |
3128 | } | |
3129 | ||
6b96018b AB |
3130 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3131 | unsigned int cmd, unsigned long arg) | |
3132 | { | |
3133 | void __user *argp = compat_ptr(arg); | |
3134 | struct sock *sk = sock->sk; | |
3135 | struct net *net = sock_net(sk); | |
7a229387 | 3136 | |
6b96018b AB |
3137 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
3138 | return siocdevprivate_ioctl(net, cmd, argp); | |
3139 | ||
3140 | switch (cmd) { | |
3141 | case SIOCSIFBR: | |
3142 | case SIOCGIFBR: | |
3143 | return old_bridge_ioctl(argp); | |
3144 | case SIOCGIFNAME: | |
3145 | return dev_ifname32(net, argp); | |
3146 | case SIOCGIFCONF: | |
3147 | return dev_ifconf(net, argp); | |
3148 | case SIOCETHTOOL: | |
3149 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3150 | case SIOCWANDEV: |
3151 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3152 | case SIOCGIFMAP: |
3153 | case SIOCSIFMAP: | |
3154 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3155 | case SIOCBONDENSLAVE: |
3156 | case SIOCBONDRELEASE: | |
3157 | case SIOCBONDSETHWADDR: | |
3158 | case SIOCBONDSLAVEINFOQUERY: | |
3159 | case SIOCBONDINFOQUERY: | |
3160 | case SIOCBONDCHANGEACTIVE: | |
3161 | return bond_ioctl(net, cmd, argp); | |
3162 | case SIOCADDRT: | |
3163 | case SIOCDELRT: | |
3164 | return routing_ioctl(net, sock, cmd, argp); | |
3165 | case SIOCGSTAMP: | |
3166 | return do_siocgstamp(net, sock, cmd, argp); | |
3167 | case SIOCGSTAMPNS: | |
3168 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
3169 | case SIOCSHWTSTAMP: |
3170 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
3171 | |
3172 | case FIOSETOWN: | |
3173 | case SIOCSPGRP: | |
3174 | case FIOGETOWN: | |
3175 | case SIOCGPGRP: | |
3176 | case SIOCBRADDBR: | |
3177 | case SIOCBRDELBR: | |
3178 | case SIOCGIFVLAN: | |
3179 | case SIOCSIFVLAN: | |
3180 | case SIOCADDDLCI: | |
3181 | case SIOCDELDLCI: | |
3182 | return sock_ioctl(file, cmd, arg); | |
3183 | ||
3184 | case SIOCGIFFLAGS: | |
3185 | case SIOCSIFFLAGS: | |
3186 | case SIOCGIFMETRIC: | |
3187 | case SIOCSIFMETRIC: | |
3188 | case SIOCGIFMTU: | |
3189 | case SIOCSIFMTU: | |
3190 | case SIOCGIFMEM: | |
3191 | case SIOCSIFMEM: | |
3192 | case SIOCGIFHWADDR: | |
3193 | case SIOCSIFHWADDR: | |
3194 | case SIOCADDMULTI: | |
3195 | case SIOCDELMULTI: | |
3196 | case SIOCGIFINDEX: | |
6b96018b AB |
3197 | case SIOCGIFADDR: |
3198 | case SIOCSIFADDR: | |
3199 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3200 | case SIOCDIFADDR: |
6b96018b AB |
3201 | case SIOCGIFBRDADDR: |
3202 | case SIOCSIFBRDADDR: | |
3203 | case SIOCGIFDSTADDR: | |
3204 | case SIOCSIFDSTADDR: | |
3205 | case SIOCGIFNETMASK: | |
3206 | case SIOCSIFNETMASK: | |
3207 | case SIOCSIFPFLAGS: | |
3208 | case SIOCGIFPFLAGS: | |
3209 | case SIOCGIFTXQLEN: | |
3210 | case SIOCSIFTXQLEN: | |
3211 | case SIOCBRADDIF: | |
3212 | case SIOCBRDELIF: | |
9177efd3 AB |
3213 | case SIOCSIFNAME: |
3214 | case SIOCGMIIPHY: | |
3215 | case SIOCGMIIREG: | |
3216 | case SIOCSMIIREG: | |
6b96018b | 3217 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3218 | |
6b96018b AB |
3219 | case SIOCSARP: |
3220 | case SIOCGARP: | |
3221 | case SIOCDARP: | |
6b96018b | 3222 | case SIOCATMARK: |
9177efd3 AB |
3223 | return sock_do_ioctl(net, sock, cmd, arg); |
3224 | } | |
3225 | ||
6b96018b AB |
3226 | return -ENOIOCTLCMD; |
3227 | } | |
7a229387 | 3228 | |
95c96174 | 3229 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3230 | unsigned long arg) |
89bbfc95 SP |
3231 | { |
3232 | struct socket *sock = file->private_data; | |
3233 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3234 | struct sock *sk; |
3235 | struct net *net; | |
3236 | ||
3237 | sk = sock->sk; | |
3238 | net = sock_net(sk); | |
89bbfc95 SP |
3239 | |
3240 | if (sock->ops->compat_ioctl) | |
3241 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3242 | ||
87de87d5 DM |
3243 | if (ret == -ENOIOCTLCMD && |
3244 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3245 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3246 | ||
6b96018b AB |
3247 | if (ret == -ENOIOCTLCMD) |
3248 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3249 | ||
89bbfc95 SP |
3250 | return ret; |
3251 | } | |
3252 | #endif | |
3253 | ||
ac5a488e SS |
3254 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3255 | { | |
3256 | return sock->ops->bind(sock, addr, addrlen); | |
3257 | } | |
c6d409cf | 3258 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3259 | |
3260 | int kernel_listen(struct socket *sock, int backlog) | |
3261 | { | |
3262 | return sock->ops->listen(sock, backlog); | |
3263 | } | |
c6d409cf | 3264 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3265 | |
3266 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3267 | { | |
3268 | struct sock *sk = sock->sk; | |
3269 | int err; | |
3270 | ||
3271 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3272 | newsock); | |
3273 | if (err < 0) | |
3274 | goto done; | |
3275 | ||
3276 | err = sock->ops->accept(sock, *newsock, flags); | |
3277 | if (err < 0) { | |
3278 | sock_release(*newsock); | |
fa8705b0 | 3279 | *newsock = NULL; |
ac5a488e SS |
3280 | goto done; |
3281 | } | |
3282 | ||
3283 | (*newsock)->ops = sock->ops; | |
1b08534e | 3284 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3285 | |
3286 | done: | |
3287 | return err; | |
3288 | } | |
c6d409cf | 3289 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3290 | |
3291 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3292 | int flags) |
ac5a488e SS |
3293 | { |
3294 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3295 | } | |
c6d409cf | 3296 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3297 | |
3298 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3299 | int *addrlen) | |
3300 | { | |
3301 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3302 | } | |
c6d409cf | 3303 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3304 | |
3305 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3306 | int *addrlen) | |
3307 | { | |
3308 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3309 | } | |
c6d409cf | 3310 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3311 | |
3312 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3313 | char *optval, int *optlen) | |
3314 | { | |
3315 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3316 | char __user *uoptval; |
3317 | int __user *uoptlen; | |
ac5a488e SS |
3318 | int err; |
3319 | ||
fb8621bb NK |
3320 | uoptval = (char __user __force *) optval; |
3321 | uoptlen = (int __user __force *) optlen; | |
3322 | ||
ac5a488e SS |
3323 | set_fs(KERNEL_DS); |
3324 | if (level == SOL_SOCKET) | |
fb8621bb | 3325 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3326 | else |
fb8621bb NK |
3327 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3328 | uoptlen); | |
ac5a488e SS |
3329 | set_fs(oldfs); |
3330 | return err; | |
3331 | } | |
c6d409cf | 3332 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3333 | |
3334 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3335 | char *optval, unsigned int optlen) |
ac5a488e SS |
3336 | { |
3337 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3338 | char __user *uoptval; |
ac5a488e SS |
3339 | int err; |
3340 | ||
fb8621bb NK |
3341 | uoptval = (char __user __force *) optval; |
3342 | ||
ac5a488e SS |
3343 | set_fs(KERNEL_DS); |
3344 | if (level == SOL_SOCKET) | |
fb8621bb | 3345 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3346 | else |
fb8621bb | 3347 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3348 | optlen); |
3349 | set_fs(oldfs); | |
3350 | return err; | |
3351 | } | |
c6d409cf | 3352 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3353 | |
3354 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3355 | size_t size, int flags) | |
3356 | { | |
f8451725 HX |
3357 | sock_update_classid(sock->sk); |
3358 | ||
ac5a488e SS |
3359 | if (sock->ops->sendpage) |
3360 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3361 | ||
3362 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3363 | } | |
c6d409cf | 3364 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3365 | |
3366 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3367 | { | |
3368 | mm_segment_t oldfs = get_fs(); | |
3369 | int err; | |
3370 | ||
3371 | set_fs(KERNEL_DS); | |
3372 | err = sock->ops->ioctl(sock, cmd, arg); | |
3373 | set_fs(oldfs); | |
3374 | ||
3375 | return err; | |
3376 | } | |
c6d409cf | 3377 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3378 | |
91cf45f0 TM |
3379 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3380 | { | |
3381 | return sock->ops->shutdown(sock, how); | |
3382 | } | |
91cf45f0 | 3383 | EXPORT_SYMBOL(kernel_sock_shutdown); |