]>
Commit | Line | Data |
---|---|---|
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> | |
7 | * Ross Biro | |
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) | |
45 | * Tigran Aivazian : Made listen(2) backlog sanity checks | |
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 | |
56 | * paradigm. | |
57 | * | |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
61 | #include <linux/mm.h> | |
62 | #include <linux/socket.h> | |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
66 | #include <linux/thread_info.h> | |
67 | #include <linux/rcupdate.h> | |
68 | #include <linux/netdevice.h> | |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
71 | #include <linux/mutex.h> | |
72 | #include <linux/wanrouter.h> | |
73 | #include <linux/if_bridge.h> | |
74 | #include <linux/if_frad.h> | |
75 | #include <linux/if_vlan.h> | |
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> | |
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> | |
86 | #include <linux/audit.h> | |
87 | #include <linux/wireless.h> | |
88 | #include <linux/nsproxy.h> | |
89 | #include <linux/magic.h> | |
90 | #include <linux/slab.h> | |
91 | #include <linux/xattr.h> | |
92 | ||
93 | #include <asm/uaccess.h> | |
94 | #include <asm/unistd.h> | |
95 | ||
96 | #include <net/compat.h> | |
97 | #include <net/wext.h> | |
98 | #include <net/cls_cgroup.h> | |
99 | ||
100 | #include <net/sock.h> | |
101 | #include <linux/netfilter.h> | |
102 | ||
103 | #include <linux/if_tun.h> | |
104 | #include <linux/ipv6_route.h> | |
105 | #include <linux/route.h> | |
106 | #include <linux/sockios.h> | |
107 | #include <linux/atalk.h> | |
108 | ||
109 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); | |
110 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, | |
111 | unsigned long nr_segs, loff_t pos); | |
112 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
113 | unsigned long nr_segs, loff_t pos); | |
114 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); | |
115 | ||
116 | static int sock_close(struct inode *inode, struct file *file); | |
117 | static unsigned int sock_poll(struct file *file, | |
118 | struct poll_table_struct *wait); | |
119 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); | |
120 | #ifdef CONFIG_COMPAT | |
121 | static long compat_sock_ioctl(struct file *file, | |
122 | unsigned int cmd, unsigned long arg); | |
123 | #endif | |
124 | static int sock_fasync(int fd, struct file *filp, int on); | |
125 | static ssize_t sock_sendpage(struct file *file, struct page *page, | |
126 | int offset, size_t size, loff_t *ppos, int more); | |
127 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, | |
128 | struct pipe_inode_info *pipe, size_t len, | |
129 | unsigned int flags); | |
130 | ||
131 | /* | |
132 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
133 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
134 | */ | |
135 | ||
136 | static const struct file_operations socket_file_ops = { | |
137 | .owner = THIS_MODULE, | |
138 | .llseek = no_llseek, | |
139 | .aio_read = sock_aio_read, | |
140 | .aio_write = sock_aio_write, | |
141 | .poll = sock_poll, | |
142 | .unlocked_ioctl = sock_ioctl, | |
143 | #ifdef CONFIG_COMPAT | |
144 | .compat_ioctl = compat_sock_ioctl, | |
145 | #endif | |
146 | .mmap = sock_mmap, | |
147 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
148 | .release = sock_close, | |
149 | .fasync = sock_fasync, | |
150 | .sendpage = sock_sendpage, | |
151 | .splice_write = generic_splice_sendpage, | |
152 | .splice_read = sock_splice_read, | |
153 | }; | |
154 | ||
155 | /* | |
156 | * The protocol list. Each protocol is registered in here. | |
157 | */ | |
158 | ||
159 | static DEFINE_SPINLOCK(net_family_lock); | |
160 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; | |
161 | ||
162 | /* | |
163 | * Statistics counters of the socket lists | |
164 | */ | |
165 | ||
166 | static DEFINE_PER_CPU(int, sockets_in_use); | |
167 | ||
168 | /* | |
169 | * Support routines. | |
170 | * Move socket addresses back and forth across the kernel/user | |
171 | * divide and look after the messy bits. | |
172 | */ | |
173 | ||
174 | /** | |
175 | * move_addr_to_kernel - copy a socket address into kernel space | |
176 | * @uaddr: Address in user space | |
177 | * @kaddr: Address in kernel space | |
178 | * @ulen: Length in user space | |
179 | * | |
180 | * The address is copied into kernel space. If the provided address is | |
181 | * too long an error code of -EINVAL is returned. If the copy gives | |
182 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
183 | */ | |
184 | ||
185 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) | |
186 | { | |
187 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) | |
188 | return -EINVAL; | |
189 | if (ulen == 0) | |
190 | return 0; | |
191 | if (copy_from_user(kaddr, uaddr, ulen)) | |
192 | return -EFAULT; | |
193 | return audit_sockaddr(ulen, kaddr); | |
194 | } | |
195 | ||
196 | /** | |
197 | * move_addr_to_user - copy an address to user space | |
198 | * @kaddr: kernel space address | |
199 | * @klen: length of address in kernel | |
200 | * @uaddr: user space address | |
201 | * @ulen: pointer to user length field | |
202 | * | |
203 | * The value pointed to by ulen on entry is the buffer length available. | |
204 | * This is overwritten with the buffer space used. -EINVAL is returned | |
205 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
206 | * is returned if either the buffer or the length field are not | |
207 | * accessible. | |
208 | * After copying the data up to the limit the user specifies, the true | |
209 | * length of the data is written over the length limit the user | |
210 | * specified. Zero is returned for a success. | |
211 | */ | |
212 | ||
213 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, | |
214 | void __user *uaddr, int __user *ulen) | |
215 | { | |
216 | int err; | |
217 | int len; | |
218 | ||
219 | err = get_user(len, ulen); | |
220 | if (err) | |
221 | return err; | |
222 | if (len > klen) | |
223 | len = klen; | |
224 | if (len < 0 || len > sizeof(struct sockaddr_storage)) | |
225 | return -EINVAL; | |
226 | if (len) { | |
227 | if (audit_sockaddr(klen, kaddr)) | |
228 | return -ENOMEM; | |
229 | if (copy_to_user(uaddr, kaddr, len)) | |
230 | return -EFAULT; | |
231 | } | |
232 | /* | |
233 | * "fromlen shall refer to the value before truncation.." | |
234 | * 1003.1g | |
235 | */ | |
236 | return __put_user(klen, ulen); | |
237 | } | |
238 | ||
239 | static struct kmem_cache *sock_inode_cachep __read_mostly; | |
240 | ||
241 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
242 | { | |
243 | struct socket_alloc *ei; | |
244 | struct socket_wq *wq; | |
245 | ||
246 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); | |
247 | if (!ei) | |
248 | return NULL; | |
249 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); | |
250 | if (!wq) { | |
251 | kmem_cache_free(sock_inode_cachep, ei); | |
252 | return NULL; | |
253 | } | |
254 | init_waitqueue_head(&wq->wait); | |
255 | wq->fasync_list = NULL; | |
256 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
257 | ||
258 | ei->socket.state = SS_UNCONNECTED; | |
259 | ei->socket.flags = 0; | |
260 | ei->socket.ops = NULL; | |
261 | ei->socket.sk = NULL; | |
262 | ei->socket.file = NULL; | |
263 | ||
264 | return &ei->vfs_inode; | |
265 | } | |
266 | ||
267 | static void sock_destroy_inode(struct inode *inode) | |
268 | { | |
269 | struct socket_alloc *ei; | |
270 | struct socket_wq *wq; | |
271 | ||
272 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
273 | wq = rcu_dereference_protected(ei->socket.wq, 1); | |
274 | kfree_rcu(wq, rcu); | |
275 | kmem_cache_free(sock_inode_cachep, ei); | |
276 | } | |
277 | ||
278 | static void init_once(void *foo) | |
279 | { | |
280 | struct socket_alloc *ei = (struct socket_alloc *)foo; | |
281 | ||
282 | inode_init_once(&ei->vfs_inode); | |
283 | } | |
284 | ||
285 | static int init_inodecache(void) | |
286 | { | |
287 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
288 | sizeof(struct socket_alloc), | |
289 | 0, | |
290 | (SLAB_HWCACHE_ALIGN | | |
291 | SLAB_RECLAIM_ACCOUNT | | |
292 | SLAB_MEM_SPREAD), | |
293 | init_once); | |
294 | if (sock_inode_cachep == NULL) | |
295 | return -ENOMEM; | |
296 | return 0; | |
297 | } | |
298 | ||
299 | static const struct super_operations sockfs_ops = { | |
300 | .alloc_inode = sock_alloc_inode, | |
301 | .destroy_inode = sock_destroy_inode, | |
302 | .statfs = simple_statfs, | |
303 | }; | |
304 | ||
305 | /* | |
306 | * sockfs_dname() is called from d_path(). | |
307 | */ | |
308 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
309 | { | |
310 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
311 | dentry->d_inode->i_ino); | |
312 | } | |
313 | ||
314 | static const struct dentry_operations sockfs_dentry_operations = { | |
315 | .d_dname = sockfs_dname, | |
316 | }; | |
317 | ||
318 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, | |
319 | int flags, const char *dev_name, void *data) | |
320 | { | |
321 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
322 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
323 | } | |
324 | ||
325 | static struct vfsmount *sock_mnt __read_mostly; | |
326 | ||
327 | static struct file_system_type sock_fs_type = { | |
328 | .name = "sockfs", | |
329 | .mount = sockfs_mount, | |
330 | .kill_sb = kill_anon_super, | |
331 | }; | |
332 | ||
333 | /* | |
334 | * Obtains the first available file descriptor and sets it up for use. | |
335 | * | |
336 | * These functions create file structures and maps them to fd space | |
337 | * of the current process. On success it returns file descriptor | |
338 | * and file struct implicitly stored in sock->file. | |
339 | * Note that another thread may close file descriptor before we return | |
340 | * from this function. We use the fact that now we do not refer | |
341 | * to socket after mapping. If one day we will need it, this | |
342 | * function will increment ref. count on file by 1. | |
343 | * | |
344 | * In any case returned fd MAY BE not valid! | |
345 | * This race condition is unavoidable | |
346 | * with shared fd spaces, we cannot solve it inside kernel, | |
347 | * but we take care of internal coherence yet. | |
348 | */ | |
349 | ||
350 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) | |
351 | { | |
352 | struct qstr name = { .name = "" }; | |
353 | struct path path; | |
354 | struct file *file; | |
355 | ||
356 | if (dname) { | |
357 | name.name = dname; | |
358 | name.len = strlen(name.name); | |
359 | } else if (sock->sk) { | |
360 | name.name = sock->sk->sk_prot_creator->name; | |
361 | name.len = strlen(name.name); | |
362 | } | |
363 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); | |
364 | if (unlikely(!path.dentry)) | |
365 | return ERR_PTR(-ENOMEM); | |
366 | path.mnt = mntget(sock_mnt); | |
367 | ||
368 | d_instantiate(path.dentry, SOCK_INODE(sock)); | |
369 | SOCK_INODE(sock)->i_fop = &socket_file_ops; | |
370 | ||
371 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, | |
372 | &socket_file_ops); | |
373 | if (unlikely(!file)) { | |
374 | /* drop dentry, keep inode */ | |
375 | ihold(path.dentry->d_inode); | |
376 | path_put(&path); | |
377 | return ERR_PTR(-ENFILE); | |
378 | } | |
379 | ||
380 | sock->file = file; | |
381 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); | |
382 | file->f_pos = 0; | |
383 | file->private_data = sock; | |
384 | return file; | |
385 | } | |
386 | EXPORT_SYMBOL(sock_alloc_file); | |
387 | ||
388 | static int sock_map_fd(struct socket *sock, int flags) | |
389 | { | |
390 | struct file *newfile; | |
391 | int fd = get_unused_fd_flags(flags); | |
392 | if (unlikely(fd < 0)) | |
393 | return fd; | |
394 | ||
395 | newfile = sock_alloc_file(sock, flags, NULL); | |
396 | if (likely(!IS_ERR(newfile))) { | |
397 | fd_install(fd, newfile); | |
398 | return fd; | |
399 | } | |
400 | ||
401 | put_unused_fd(fd); | |
402 | return PTR_ERR(newfile); | |
403 | } | |
404 | ||
405 | struct socket *sock_from_file(struct file *file, int *err) | |
406 | { | |
407 | if (file->f_op == &socket_file_ops) | |
408 | return file->private_data; /* set in sock_map_fd */ | |
409 | ||
410 | *err = -ENOTSOCK; | |
411 | return NULL; | |
412 | } | |
413 | EXPORT_SYMBOL(sock_from_file); | |
414 | ||
415 | /** | |
416 | * sockfd_lookup - Go from a file number to its socket slot | |
417 | * @fd: file handle | |
418 | * @err: pointer to an error code return | |
419 | * | |
420 | * The file handle passed in is locked and the socket it is bound | |
421 | * too is returned. If an error occurs the err pointer is overwritten | |
422 | * with a negative errno code and NULL is returned. The function checks | |
423 | * for both invalid handles and passing a handle which is not a socket. | |
424 | * | |
425 | * On a success the socket object pointer is returned. | |
426 | */ | |
427 | ||
428 | struct socket *sockfd_lookup(int fd, int *err) | |
429 | { | |
430 | struct file *file; | |
431 | struct socket *sock; | |
432 | ||
433 | file = fget(fd); | |
434 | if (!file) { | |
435 | *err = -EBADF; | |
436 | return NULL; | |
437 | } | |
438 | ||
439 | sock = sock_from_file(file, err); | |
440 | if (!sock) | |
441 | fput(file); | |
442 | return sock; | |
443 | } | |
444 | EXPORT_SYMBOL(sockfd_lookup); | |
445 | ||
446 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) | |
447 | { | |
448 | struct file *file; | |
449 | struct socket *sock; | |
450 | ||
451 | *err = -EBADF; | |
452 | file = fget_light(fd, fput_needed); | |
453 | if (file) { | |
454 | sock = sock_from_file(file, err); | |
455 | if (sock) | |
456 | return sock; | |
457 | fput_light(file, *fput_needed); | |
458 | } | |
459 | return NULL; | |
460 | } | |
461 | ||
462 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" | |
463 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
464 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
465 | static ssize_t sockfs_getxattr(struct dentry *dentry, | |
466 | const char *name, void *value, size_t size) | |
467 | { | |
468 | const char *proto_name; | |
469 | size_t proto_size; | |
470 | int error; | |
471 | ||
472 | error = -ENODATA; | |
473 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { | |
474 | proto_name = dentry->d_name.name; | |
475 | proto_size = strlen(proto_name); | |
476 | ||
477 | if (value) { | |
478 | error = -ERANGE; | |
479 | if (proto_size + 1 > size) | |
480 | goto out; | |
481 | ||
482 | strncpy(value, proto_name, proto_size + 1); | |
483 | } | |
484 | error = proto_size + 1; | |
485 | } | |
486 | ||
487 | out: | |
488 | return error; | |
489 | } | |
490 | ||
491 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, | |
492 | size_t size) | |
493 | { | |
494 | ssize_t len; | |
495 | ssize_t used = 0; | |
496 | ||
497 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); | |
498 | if (len < 0) | |
499 | return len; | |
500 | used += len; | |
501 | if (buffer) { | |
502 | if (size < used) | |
503 | return -ERANGE; | |
504 | buffer += len; | |
505 | } | |
506 | ||
507 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
508 | used += len; | |
509 | if (buffer) { | |
510 | if (size < used) | |
511 | return -ERANGE; | |
512 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
513 | buffer += len; | |
514 | } | |
515 | ||
516 | return used; | |
517 | } | |
518 | ||
519 | static const struct inode_operations sockfs_inode_ops = { | |
520 | .getxattr = sockfs_getxattr, | |
521 | .listxattr = sockfs_listxattr, | |
522 | }; | |
523 | ||
524 | /** | |
525 | * sock_alloc - allocate a socket | |
526 | * | |
527 | * Allocate a new inode and socket object. The two are bound together | |
528 | * and initialised. The socket is then returned. If we are out of inodes | |
529 | * NULL is returned. | |
530 | */ | |
531 | ||
532 | static struct socket *sock_alloc(void) | |
533 | { | |
534 | struct inode *inode; | |
535 | struct socket *sock; | |
536 | ||
537 | inode = new_inode_pseudo(sock_mnt->mnt_sb); | |
538 | if (!inode) | |
539 | return NULL; | |
540 | ||
541 | sock = SOCKET_I(inode); | |
542 | ||
543 | kmemcheck_annotate_bitfield(sock, type); | |
544 | inode->i_ino = get_next_ino(); | |
545 | inode->i_mode = S_IFSOCK | S_IRWXUGO; | |
546 | inode->i_uid = current_fsuid(); | |
547 | inode->i_gid = current_fsgid(); | |
548 | inode->i_op = &sockfs_inode_ops; | |
549 | ||
550 | this_cpu_add(sockets_in_use, 1); | |
551 | return sock; | |
552 | } | |
553 | ||
554 | /* | |
555 | * In theory you can't get an open on this inode, but /proc provides | |
556 | * a back door. Remember to keep it shut otherwise you'll let the | |
557 | * creepy crawlies in. | |
558 | */ | |
559 | ||
560 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) | |
561 | { | |
562 | return -ENXIO; | |
563 | } | |
564 | ||
565 | const struct file_operations bad_sock_fops = { | |
566 | .owner = THIS_MODULE, | |
567 | .open = sock_no_open, | |
568 | .llseek = noop_llseek, | |
569 | }; | |
570 | ||
571 | /** | |
572 | * sock_release - close a socket | |
573 | * @sock: socket to close | |
574 | * | |
575 | * The socket is released from the protocol stack if it has a release | |
576 | * callback, and the inode is then released if the socket is bound to | |
577 | * an inode not a file. | |
578 | */ | |
579 | ||
580 | void sock_release(struct socket *sock) | |
581 | { | |
582 | if (sock->ops) { | |
583 | struct module *owner = sock->ops->owner; | |
584 | ||
585 | sock->ops->release(sock); | |
586 | sock->ops = NULL; | |
587 | module_put(owner); | |
588 | } | |
589 | ||
590 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) | |
591 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); | |
592 | ||
593 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) | |
594 | return; | |
595 | ||
596 | this_cpu_sub(sockets_in_use, 1); | |
597 | if (!sock->file) { | |
598 | iput(SOCK_INODE(sock)); | |
599 | return; | |
600 | } | |
601 | sock->file = NULL; | |
602 | } | |
603 | EXPORT_SYMBOL(sock_release); | |
604 | ||
605 | int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) | |
606 | { | |
607 | *tx_flags = 0; | |
608 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) | |
609 | *tx_flags |= SKBTX_HW_TSTAMP; | |
610 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) | |
611 | *tx_flags |= SKBTX_SW_TSTAMP; | |
612 | if (sock_flag(sk, SOCK_WIFI_STATUS)) | |
613 | *tx_flags |= SKBTX_WIFI_STATUS; | |
614 | return 0; | |
615 | } | |
616 | EXPORT_SYMBOL(sock_tx_timestamp); | |
617 | ||
618 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, | |
619 | struct msghdr *msg, size_t size) | |
620 | { | |
621 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
622 | ||
623 | si->sock = sock; | |
624 | si->scm = NULL; | |
625 | si->msg = msg; | |
626 | si->size = size; | |
627 | ||
628 | return sock->ops->sendmsg(iocb, sock, msg, size); | |
629 | } | |
630 | ||
631 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, | |
632 | struct msghdr *msg, size_t size) | |
633 | { | |
634 | int err = security_socket_sendmsg(sock, msg, size); | |
635 | ||
636 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); | |
637 | } | |
638 | ||
639 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
640 | { | |
641 | struct kiocb iocb; | |
642 | struct sock_iocb siocb; | |
643 | int ret; | |
644 | ||
645 | init_sync_kiocb(&iocb, NULL); | |
646 | iocb.private = &siocb; | |
647 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
648 | if (-EIOCBQUEUED == ret) | |
649 | ret = wait_on_sync_kiocb(&iocb); | |
650 | return ret; | |
651 | } | |
652 | EXPORT_SYMBOL(sock_sendmsg); | |
653 | ||
654 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) | |
655 | { | |
656 | struct kiocb iocb; | |
657 | struct sock_iocb siocb; | |
658 | int ret; | |
659 | ||
660 | init_sync_kiocb(&iocb, NULL); | |
661 | iocb.private = &siocb; | |
662 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); | |
663 | if (-EIOCBQUEUED == ret) | |
664 | ret = wait_on_sync_kiocb(&iocb); | |
665 | return ret; | |
666 | } | |
667 | ||
668 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
669 | struct kvec *vec, size_t num, size_t size) | |
670 | { | |
671 | mm_segment_t oldfs = get_fs(); | |
672 | int result; | |
673 | ||
674 | set_fs(KERNEL_DS); | |
675 | /* | |
676 | * the following is safe, since for compiler definitions of kvec and | |
677 | * iovec are identical, yielding the same in-core layout and alignment | |
678 | */ | |
679 | msg->msg_iov = (struct iovec *)vec; | |
680 | msg->msg_iovlen = num; | |
681 | result = sock_sendmsg(sock, msg, size); | |
682 | set_fs(oldfs); | |
683 | return result; | |
684 | } | |
685 | EXPORT_SYMBOL(kernel_sendmsg); | |
686 | ||
687 | static int ktime2ts(ktime_t kt, struct timespec *ts) | |
688 | { | |
689 | if (kt.tv64) { | |
690 | *ts = ktime_to_timespec(kt); | |
691 | return 1; | |
692 | } else { | |
693 | return 0; | |
694 | } | |
695 | } | |
696 | ||
697 | /* | |
698 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
699 | */ | |
700 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
701 | struct sk_buff *skb) | |
702 | { | |
703 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); | |
704 | struct timespec ts[3]; | |
705 | int empty = 1; | |
706 | struct skb_shared_hwtstamps *shhwtstamps = | |
707 | skb_hwtstamps(skb); | |
708 | ||
709 | /* Race occurred between timestamp enabling and packet | |
710 | receiving. Fill in the current time for now. */ | |
711 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
712 | __net_timestamp(skb); | |
713 | ||
714 | if (need_software_tstamp) { | |
715 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
716 | struct timeval tv; | |
717 | skb_get_timestamp(skb, &tv); | |
718 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
719 | sizeof(tv), &tv); | |
720 | } else { | |
721 | skb_get_timestampns(skb, &ts[0]); | |
722 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, | |
723 | sizeof(ts[0]), &ts[0]); | |
724 | } | |
725 | } | |
726 | ||
727 | ||
728 | memset(ts, 0, sizeof(ts)); | |
729 | if (skb->tstamp.tv64 && | |
730 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
731 | skb_get_timestampns(skb, ts + 0); | |
732 | empty = 0; | |
733 | } | |
734 | if (shhwtstamps) { | |
735 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
736 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
737 | empty = 0; | |
738 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
739 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
740 | empty = 0; | |
741 | } | |
742 | if (!empty) | |
743 | put_cmsg(msg, SOL_SOCKET, | |
744 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
745 | } | |
746 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); | |
747 | ||
748 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, | |
749 | struct sk_buff *skb) | |
750 | { | |
751 | int ack; | |
752 | ||
753 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
754 | return; | |
755 | if (!skb->wifi_acked_valid) | |
756 | return; | |
757 | ||
758 | ack = skb->wifi_acked; | |
759 | ||
760 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
761 | } | |
762 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
763 | ||
764 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, | |
765 | struct sk_buff *skb) | |
766 | { | |
767 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
768 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
769 | sizeof(__u32), &skb->dropcount); | |
770 | } | |
771 | ||
772 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, | |
773 | struct sk_buff *skb) | |
774 | { | |
775 | sock_recv_timestamp(msg, sk, skb); | |
776 | sock_recv_drops(msg, sk, skb); | |
777 | } | |
778 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); | |
779 | ||
780 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, | |
781 | struct msghdr *msg, size_t size, int flags) | |
782 | { | |
783 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
784 | ||
785 | si->sock = sock; | |
786 | si->scm = NULL; | |
787 | si->msg = msg; | |
788 | si->size = size; | |
789 | si->flags = flags; | |
790 | ||
791 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); | |
792 | } | |
793 | ||
794 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, | |
795 | struct msghdr *msg, size_t size, int flags) | |
796 | { | |
797 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
798 | ||
799 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
800 | } | |
801 | ||
802 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, | |
803 | size_t size, int flags) | |
804 | { | |
805 | struct kiocb iocb; | |
806 | struct sock_iocb siocb; | |
807 | int ret; | |
808 | ||
809 | init_sync_kiocb(&iocb, NULL); | |
810 | iocb.private = &siocb; | |
811 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
812 | if (-EIOCBQUEUED == ret) | |
813 | ret = wait_on_sync_kiocb(&iocb); | |
814 | return ret; | |
815 | } | |
816 | EXPORT_SYMBOL(sock_recvmsg); | |
817 | ||
818 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, | |
819 | size_t size, int flags) | |
820 | { | |
821 | struct kiocb iocb; | |
822 | struct sock_iocb siocb; | |
823 | int ret; | |
824 | ||
825 | init_sync_kiocb(&iocb, NULL); | |
826 | iocb.private = &siocb; | |
827 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
828 | if (-EIOCBQUEUED == ret) | |
829 | ret = wait_on_sync_kiocb(&iocb); | |
830 | return ret; | |
831 | } | |
832 | ||
833 | /** | |
834 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
835 | * @sock: The socket to receive the message from | |
836 | * @msg: Received message | |
837 | * @vec: Input s/g array for message data | |
838 | * @num: Size of input s/g array | |
839 | * @size: Number of bytes to read | |
840 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
841 | * | |
842 | * On return the msg structure contains the scatter/gather array passed in the | |
843 | * vec argument. The array is modified so that it consists of the unfilled | |
844 | * portion of the original array. | |
845 | * | |
846 | * The returned value is the total number of bytes received, or an error. | |
847 | */ | |
848 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, | |
849 | struct kvec *vec, size_t num, size_t size, int flags) | |
850 | { | |
851 | mm_segment_t oldfs = get_fs(); | |
852 | int result; | |
853 | ||
854 | set_fs(KERNEL_DS); | |
855 | /* | |
856 | * the following is safe, since for compiler definitions of kvec and | |
857 | * iovec are identical, yielding the same in-core layout and alignment | |
858 | */ | |
859 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; | |
860 | result = sock_recvmsg(sock, msg, size, flags); | |
861 | set_fs(oldfs); | |
862 | return result; | |
863 | } | |
864 | EXPORT_SYMBOL(kernel_recvmsg); | |
865 | ||
866 | static void sock_aio_dtor(struct kiocb *iocb) | |
867 | { | |
868 | kfree(iocb->private); | |
869 | } | |
870 | ||
871 | static ssize_t sock_sendpage(struct file *file, struct page *page, | |
872 | int offset, size_t size, loff_t *ppos, int more) | |
873 | { | |
874 | struct socket *sock; | |
875 | int flags; | |
876 | ||
877 | sock = file->private_data; | |
878 | ||
879 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
880 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
881 | flags |= more; | |
882 | ||
883 | return kernel_sendpage(sock, page, offset, size, flags); | |
884 | } | |
885 | ||
886 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, | |
887 | struct pipe_inode_info *pipe, size_t len, | |
888 | unsigned int flags) | |
889 | { | |
890 | struct socket *sock = file->private_data; | |
891 | ||
892 | if (unlikely(!sock->ops->splice_read)) | |
893 | return -EINVAL; | |
894 | ||
895 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); | |
896 | } | |
897 | ||
898 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, | |
899 | struct sock_iocb *siocb) | |
900 | { | |
901 | if (!is_sync_kiocb(iocb)) { | |
902 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
903 | if (!siocb) | |
904 | return NULL; | |
905 | iocb->ki_dtor = sock_aio_dtor; | |
906 | } | |
907 | ||
908 | siocb->kiocb = iocb; | |
909 | iocb->private = siocb; | |
910 | return siocb; | |
911 | } | |
912 | ||
913 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, | |
914 | struct file *file, const struct iovec *iov, | |
915 | unsigned long nr_segs) | |
916 | { | |
917 | struct socket *sock = file->private_data; | |
918 | size_t size = 0; | |
919 | int i; | |
920 | ||
921 | for (i = 0; i < nr_segs; i++) | |
922 | size += iov[i].iov_len; | |
923 | ||
924 | msg->msg_name = NULL; | |
925 | msg->msg_namelen = 0; | |
926 | msg->msg_control = NULL; | |
927 | msg->msg_controllen = 0; | |
928 | msg->msg_iov = (struct iovec *)iov; | |
929 | msg->msg_iovlen = nr_segs; | |
930 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
931 | ||
932 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
933 | } | |
934 | ||
935 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, | |
936 | unsigned long nr_segs, loff_t pos) | |
937 | { | |
938 | struct sock_iocb siocb, *x; | |
939 | ||
940 | if (pos != 0) | |
941 | return -ESPIPE; | |
942 | ||
943 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
944 | return 0; | |
945 | ||
946 | ||
947 | x = alloc_sock_iocb(iocb, &siocb); | |
948 | if (!x) | |
949 | return -ENOMEM; | |
950 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); | |
951 | } | |
952 | ||
953 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, | |
954 | struct file *file, const struct iovec *iov, | |
955 | unsigned long nr_segs) | |
956 | { | |
957 | struct socket *sock = file->private_data; | |
958 | size_t size = 0; | |
959 | int i; | |
960 | ||
961 | for (i = 0; i < nr_segs; i++) | |
962 | size += iov[i].iov_len; | |
963 | ||
964 | msg->msg_name = NULL; | |
965 | msg->msg_namelen = 0; | |
966 | msg->msg_control = NULL; | |
967 | msg->msg_controllen = 0; | |
968 | msg->msg_iov = (struct iovec *)iov; | |
969 | msg->msg_iovlen = nr_segs; | |
970 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
971 | if (sock->type == SOCK_SEQPACKET) | |
972 | msg->msg_flags |= MSG_EOR; | |
973 | ||
974 | return __sock_sendmsg(iocb, sock, msg, size); | |
975 | } | |
976 | ||
977 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
978 | unsigned long nr_segs, loff_t pos) | |
979 | { | |
980 | struct sock_iocb siocb, *x; | |
981 | ||
982 | if (pos != 0) | |
983 | return -ESPIPE; | |
984 | ||
985 | x = alloc_sock_iocb(iocb, &siocb); | |
986 | if (!x) | |
987 | return -ENOMEM; | |
988 | ||
989 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); | |
990 | } | |
991 | ||
992 | /* | |
993 | * Atomic setting of ioctl hooks to avoid race | |
994 | * with module unload. | |
995 | */ | |
996 | ||
997 | static DEFINE_MUTEX(br_ioctl_mutex); | |
998 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); | |
999 | ||
1000 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) | |
1001 | { | |
1002 | mutex_lock(&br_ioctl_mutex); | |
1003 | br_ioctl_hook = hook; | |
1004 | mutex_unlock(&br_ioctl_mutex); | |
1005 | } | |
1006 | EXPORT_SYMBOL(brioctl_set); | |
1007 | ||
1008 | static DEFINE_MUTEX(vlan_ioctl_mutex); | |
1009 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); | |
1010 | ||
1011 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) | |
1012 | { | |
1013 | mutex_lock(&vlan_ioctl_mutex); | |
1014 | vlan_ioctl_hook = hook; | |
1015 | mutex_unlock(&vlan_ioctl_mutex); | |
1016 | } | |
1017 | EXPORT_SYMBOL(vlan_ioctl_set); | |
1018 | ||
1019 | static DEFINE_MUTEX(dlci_ioctl_mutex); | |
1020 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); | |
1021 | ||
1022 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) | |
1023 | { | |
1024 | mutex_lock(&dlci_ioctl_mutex); | |
1025 | dlci_ioctl_hook = hook; | |
1026 | mutex_unlock(&dlci_ioctl_mutex); | |
1027 | } | |
1028 | EXPORT_SYMBOL(dlci_ioctl_set); | |
1029 | ||
1030 | static long sock_do_ioctl(struct net *net, struct socket *sock, | |
1031 | unsigned int cmd, unsigned long arg) | |
1032 | { | |
1033 | int err; | |
1034 | void __user *argp = (void __user *)arg; | |
1035 | ||
1036 | err = sock->ops->ioctl(sock, cmd, arg); | |
1037 | ||
1038 | /* | |
1039 | * If this ioctl is unknown try to hand it down | |
1040 | * to the NIC driver. | |
1041 | */ | |
1042 | if (err == -ENOIOCTLCMD) | |
1043 | err = dev_ioctl(net, cmd, argp); | |
1044 | ||
1045 | return err; | |
1046 | } | |
1047 | ||
1048 | /* | |
1049 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1050 | * what to do with it - that's up to the protocol still. | |
1051 | */ | |
1052 | ||
1053 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1054 | { | |
1055 | struct socket *sock; | |
1056 | struct sock *sk; | |
1057 | void __user *argp = (void __user *)arg; | |
1058 | int pid, err; | |
1059 | struct net *net; | |
1060 | ||
1061 | sock = file->private_data; | |
1062 | sk = sock->sk; | |
1063 | net = sock_net(sk); | |
1064 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { | |
1065 | err = dev_ioctl(net, cmd, argp); | |
1066 | } else | |
1067 | #ifdef CONFIG_WEXT_CORE | |
1068 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { | |
1069 | err = dev_ioctl(net, cmd, argp); | |
1070 | } else | |
1071 | #endif | |
1072 | switch (cmd) { | |
1073 | case FIOSETOWN: | |
1074 | case SIOCSPGRP: | |
1075 | err = -EFAULT; | |
1076 | if (get_user(pid, (int __user *)argp)) | |
1077 | break; | |
1078 | err = f_setown(sock->file, pid, 1); | |
1079 | break; | |
1080 | case FIOGETOWN: | |
1081 | case SIOCGPGRP: | |
1082 | err = put_user(f_getown(sock->file), | |
1083 | (int __user *)argp); | |
1084 | break; | |
1085 | case SIOCGIFBR: | |
1086 | case SIOCSIFBR: | |
1087 | case SIOCBRADDBR: | |
1088 | case SIOCBRDELBR: | |
1089 | err = -ENOPKG; | |
1090 | if (!br_ioctl_hook) | |
1091 | request_module("bridge"); | |
1092 | ||
1093 | mutex_lock(&br_ioctl_mutex); | |
1094 | if (br_ioctl_hook) | |
1095 | err = br_ioctl_hook(net, cmd, argp); | |
1096 | mutex_unlock(&br_ioctl_mutex); | |
1097 | break; | |
1098 | case SIOCGIFVLAN: | |
1099 | case SIOCSIFVLAN: | |
1100 | err = -ENOPKG; | |
1101 | if (!vlan_ioctl_hook) | |
1102 | request_module("8021q"); | |
1103 | ||
1104 | mutex_lock(&vlan_ioctl_mutex); | |
1105 | if (vlan_ioctl_hook) | |
1106 | err = vlan_ioctl_hook(net, argp); | |
1107 | mutex_unlock(&vlan_ioctl_mutex); | |
1108 | break; | |
1109 | case SIOCADDDLCI: | |
1110 | case SIOCDELDLCI: | |
1111 | err = -ENOPKG; | |
1112 | if (!dlci_ioctl_hook) | |
1113 | request_module("dlci"); | |
1114 | ||
1115 | mutex_lock(&dlci_ioctl_mutex); | |
1116 | if (dlci_ioctl_hook) | |
1117 | err = dlci_ioctl_hook(cmd, argp); | |
1118 | mutex_unlock(&dlci_ioctl_mutex); | |
1119 | break; | |
1120 | default: | |
1121 | err = sock_do_ioctl(net, sock, cmd, arg); | |
1122 | break; | |
1123 | } | |
1124 | return err; | |
1125 | } | |
1126 | ||
1127 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1128 | { | |
1129 | int err; | |
1130 | struct socket *sock = NULL; | |
1131 | ||
1132 | err = security_socket_create(family, type, protocol, 1); | |
1133 | if (err) | |
1134 | goto out; | |
1135 | ||
1136 | sock = sock_alloc(); | |
1137 | if (!sock) { | |
1138 | err = -ENOMEM; | |
1139 | goto out; | |
1140 | } | |
1141 | ||
1142 | sock->type = type; | |
1143 | err = security_socket_post_create(sock, family, type, protocol, 1); | |
1144 | if (err) | |
1145 | goto out_release; | |
1146 | ||
1147 | out: | |
1148 | *res = sock; | |
1149 | return err; | |
1150 | out_release: | |
1151 | sock_release(sock); | |
1152 | sock = NULL; | |
1153 | goto out; | |
1154 | } | |
1155 | EXPORT_SYMBOL(sock_create_lite); | |
1156 | ||
1157 | /* No kernel lock held - perfect */ | |
1158 | static unsigned int sock_poll(struct file *file, poll_table *wait) | |
1159 | { | |
1160 | struct socket *sock; | |
1161 | ||
1162 | /* | |
1163 | * We can't return errors to poll, so it's either yes or no. | |
1164 | */ | |
1165 | sock = file->private_data; | |
1166 | return sock->ops->poll(file, sock, wait); | |
1167 | } | |
1168 | ||
1169 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) | |
1170 | { | |
1171 | struct socket *sock = file->private_data; | |
1172 | ||
1173 | return sock->ops->mmap(file, sock, vma); | |
1174 | } | |
1175 | ||
1176 | static int sock_close(struct inode *inode, struct file *filp) | |
1177 | { | |
1178 | /* | |
1179 | * It was possible the inode is NULL we were | |
1180 | * closing an unfinished socket. | |
1181 | */ | |
1182 | ||
1183 | if (!inode) { | |
1184 | printk(KERN_DEBUG "sock_close: NULL inode\n"); | |
1185 | return 0; | |
1186 | } | |
1187 | sock_release(SOCKET_I(inode)); | |
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | /* | |
1192 | * Update the socket async list | |
1193 | * | |
1194 | * Fasync_list locking strategy. | |
1195 | * | |
1196 | * 1. fasync_list is modified only under process context socket lock | |
1197 | * i.e. under semaphore. | |
1198 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
1199 | * or under socket lock | |
1200 | */ | |
1201 | ||
1202 | static int sock_fasync(int fd, struct file *filp, int on) | |
1203 | { | |
1204 | struct socket *sock = filp->private_data; | |
1205 | struct sock *sk = sock->sk; | |
1206 | struct socket_wq *wq; | |
1207 | ||
1208 | if (sk == NULL) | |
1209 | return -EINVAL; | |
1210 | ||
1211 | lock_sock(sk); | |
1212 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); | |
1213 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1214 | ||
1215 | if (!wq->fasync_list) | |
1216 | sock_reset_flag(sk, SOCK_FASYNC); | |
1217 | else | |
1218 | sock_set_flag(sk, SOCK_FASYNC); | |
1219 | ||
1220 | release_sock(sk); | |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ | |
1225 | ||
1226 | int sock_wake_async(struct socket *sock, int how, int band) | |
1227 | { | |
1228 | struct socket_wq *wq; | |
1229 | ||
1230 | if (!sock) | |
1231 | return -1; | |
1232 | rcu_read_lock(); | |
1233 | wq = rcu_dereference(sock->wq); | |
1234 | if (!wq || !wq->fasync_list) { | |
1235 | rcu_read_unlock(); | |
1236 | return -1; | |
1237 | } | |
1238 | switch (how) { | |
1239 | case SOCK_WAKE_WAITD: | |
1240 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) | |
1241 | break; | |
1242 | goto call_kill; | |
1243 | case SOCK_WAKE_SPACE: | |
1244 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) | |
1245 | break; | |
1246 | /* fall through */ | |
1247 | case SOCK_WAKE_IO: | |
1248 | call_kill: | |
1249 | kill_fasync(&wq->fasync_list, SIGIO, band); | |
1250 | break; | |
1251 | case SOCK_WAKE_URG: | |
1252 | kill_fasync(&wq->fasync_list, SIGURG, band); | |
1253 | } | |
1254 | rcu_read_unlock(); | |
1255 | return 0; | |
1256 | } | |
1257 | EXPORT_SYMBOL(sock_wake_async); | |
1258 | ||
1259 | int __sock_create(struct net *net, int family, int type, int protocol, | |
1260 | struct socket **res, int kern) | |
1261 | { | |
1262 | int err; | |
1263 | struct socket *sock; | |
1264 | const struct net_proto_family *pf; | |
1265 | ||
1266 | /* | |
1267 | * Check protocol is in range | |
1268 | */ | |
1269 | if (family < 0 || family >= NPROTO) | |
1270 | return -EAFNOSUPPORT; | |
1271 | if (type < 0 || type >= SOCK_MAX) | |
1272 | return -EINVAL; | |
1273 | ||
1274 | /* Compatibility. | |
1275 | ||
1276 | This uglymoron is moved from INET layer to here to avoid | |
1277 | deadlock in module load. | |
1278 | */ | |
1279 | if (family == PF_INET && type == SOCK_PACKET) { | |
1280 | static int warned; | |
1281 | if (!warned) { | |
1282 | warned = 1; | |
1283 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", | |
1284 | current->comm); | |
1285 | } | |
1286 | family = PF_PACKET; | |
1287 | } | |
1288 | ||
1289 | err = security_socket_create(family, type, protocol, kern); | |
1290 | if (err) | |
1291 | return err; | |
1292 | ||
1293 | /* | |
1294 | * Allocate the socket and allow the family to set things up. if | |
1295 | * the protocol is 0, the family is instructed to select an appropriate | |
1296 | * default. | |
1297 | */ | |
1298 | sock = sock_alloc(); | |
1299 | if (!sock) { | |
1300 | net_warn_ratelimited("socket: no more sockets\n"); | |
1301 | return -ENFILE; /* Not exactly a match, but its the | |
1302 | closest posix thing */ | |
1303 | } | |
1304 | ||
1305 | sock->type = type; | |
1306 | ||
1307 | #ifdef CONFIG_MODULES | |
1308 | /* Attempt to load a protocol module if the find failed. | |
1309 | * | |
1310 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1311 | * requested real, full-featured networking support upon configuration. | |
1312 | * Otherwise module support will break! | |
1313 | */ | |
1314 | if (rcu_access_pointer(net_families[family]) == NULL) | |
1315 | request_module("net-pf-%d", family); | |
1316 | #endif | |
1317 | ||
1318 | rcu_read_lock(); | |
1319 | pf = rcu_dereference(net_families[family]); | |
1320 | err = -EAFNOSUPPORT; | |
1321 | if (!pf) | |
1322 | goto out_release; | |
1323 | ||
1324 | /* | |
1325 | * We will call the ->create function, that possibly is in a loadable | |
1326 | * module, so we have to bump that loadable module refcnt first. | |
1327 | */ | |
1328 | if (!try_module_get(pf->owner)) | |
1329 | goto out_release; | |
1330 | ||
1331 | /* Now protected by module ref count */ | |
1332 | rcu_read_unlock(); | |
1333 | ||
1334 | err = pf->create(net, sock, protocol, kern); | |
1335 | if (err < 0) | |
1336 | goto out_module_put; | |
1337 | ||
1338 | /* | |
1339 | * Now to bump the refcnt of the [loadable] module that owns this | |
1340 | * socket at sock_release time we decrement its refcnt. | |
1341 | */ | |
1342 | if (!try_module_get(sock->ops->owner)) | |
1343 | goto out_module_busy; | |
1344 | ||
1345 | /* | |
1346 | * Now that we're done with the ->create function, the [loadable] | |
1347 | * module can have its refcnt decremented | |
1348 | */ | |
1349 | module_put(pf->owner); | |
1350 | err = security_socket_post_create(sock, family, type, protocol, kern); | |
1351 | if (err) | |
1352 | goto out_sock_release; | |
1353 | *res = sock; | |
1354 | ||
1355 | return 0; | |
1356 | ||
1357 | out_module_busy: | |
1358 | err = -EAFNOSUPPORT; | |
1359 | out_module_put: | |
1360 | sock->ops = NULL; | |
1361 | module_put(pf->owner); | |
1362 | out_sock_release: | |
1363 | sock_release(sock); | |
1364 | return err; | |
1365 | ||
1366 | out_release: | |
1367 | rcu_read_unlock(); | |
1368 | goto out_sock_release; | |
1369 | } | |
1370 | EXPORT_SYMBOL(__sock_create); | |
1371 | ||
1372 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1373 | { | |
1374 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); | |
1375 | } | |
1376 | EXPORT_SYMBOL(sock_create); | |
1377 | ||
1378 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1379 | { | |
1380 | return __sock_create(&init_net, family, type, protocol, res, 1); | |
1381 | } | |
1382 | EXPORT_SYMBOL(sock_create_kern); | |
1383 | ||
1384 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) | |
1385 | { | |
1386 | int retval; | |
1387 | struct socket *sock; | |
1388 | int flags; | |
1389 | ||
1390 | /* Check the SOCK_* constants for consistency. */ | |
1391 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1392 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1393 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1394 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1395 | ||
1396 | flags = type & ~SOCK_TYPE_MASK; | |
1397 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1398 | return -EINVAL; | |
1399 | type &= SOCK_TYPE_MASK; | |
1400 | ||
1401 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1402 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1403 | ||
1404 | retval = sock_create(family, type, protocol, &sock); | |
1405 | if (retval < 0) | |
1406 | goto out; | |
1407 | ||
1408 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); | |
1409 | if (retval < 0) | |
1410 | goto out_release; | |
1411 | ||
1412 | out: | |
1413 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1414 | return retval; | |
1415 | ||
1416 | out_release: | |
1417 | sock_release(sock); | |
1418 | return retval; | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * Create a pair of connected sockets. | |
1423 | */ | |
1424 | ||
1425 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, | |
1426 | int __user *, usockvec) | |
1427 | { | |
1428 | struct socket *sock1, *sock2; | |
1429 | int fd1, fd2, err; | |
1430 | struct file *newfile1, *newfile2; | |
1431 | int flags; | |
1432 | ||
1433 | flags = type & ~SOCK_TYPE_MASK; | |
1434 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1435 | return -EINVAL; | |
1436 | type &= SOCK_TYPE_MASK; | |
1437 | ||
1438 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1439 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1440 | ||
1441 | /* | |
1442 | * Obtain the first socket and check if the underlying protocol | |
1443 | * supports the socketpair call. | |
1444 | */ | |
1445 | ||
1446 | err = sock_create(family, type, protocol, &sock1); | |
1447 | if (err < 0) | |
1448 | goto out; | |
1449 | ||
1450 | err = sock_create(family, type, protocol, &sock2); | |
1451 | if (err < 0) | |
1452 | goto out_release_1; | |
1453 | ||
1454 | err = sock1->ops->socketpair(sock1, sock2); | |
1455 | if (err < 0) | |
1456 | goto out_release_both; | |
1457 | ||
1458 | fd1 = get_unused_fd_flags(flags); | |
1459 | if (unlikely(fd1 < 0)) { | |
1460 | err = fd1; | |
1461 | goto out_release_both; | |
1462 | } | |
1463 | fd2 = get_unused_fd_flags(flags); | |
1464 | if (unlikely(fd2 < 0)) { | |
1465 | err = fd2; | |
1466 | put_unused_fd(fd1); | |
1467 | goto out_release_both; | |
1468 | } | |
1469 | ||
1470 | newfile1 = sock_alloc_file(sock1, flags, NULL); | |
1471 | if (unlikely(IS_ERR(newfile1))) { | |
1472 | err = PTR_ERR(newfile1); | |
1473 | put_unused_fd(fd1); | |
1474 | put_unused_fd(fd2); | |
1475 | goto out_release_both; | |
1476 | } | |
1477 | ||
1478 | newfile2 = sock_alloc_file(sock2, flags, NULL); | |
1479 | if (IS_ERR(newfile2)) { | |
1480 | err = PTR_ERR(newfile2); | |
1481 | fput(newfile1); | |
1482 | put_unused_fd(fd1); | |
1483 | put_unused_fd(fd2); | |
1484 | sock_release(sock2); | |
1485 | goto out; | |
1486 | } | |
1487 | ||
1488 | audit_fd_pair(fd1, fd2); | |
1489 | fd_install(fd1, newfile1); | |
1490 | fd_install(fd2, newfile2); | |
1491 | /* fd1 and fd2 may be already another descriptors. | |
1492 | * Not kernel problem. | |
1493 | */ | |
1494 | ||
1495 | err = put_user(fd1, &usockvec[0]); | |
1496 | if (!err) | |
1497 | err = put_user(fd2, &usockvec[1]); | |
1498 | if (!err) | |
1499 | return 0; | |
1500 | ||
1501 | sys_close(fd2); | |
1502 | sys_close(fd1); | |
1503 | return err; | |
1504 | ||
1505 | out_release_both: | |
1506 | sock_release(sock2); | |
1507 | out_release_1: | |
1508 | sock_release(sock1); | |
1509 | out: | |
1510 | return err; | |
1511 | } | |
1512 | ||
1513 | /* | |
1514 | * Bind a name to a socket. Nothing much to do here since it's | |
1515 | * the protocol's responsibility to handle the local address. | |
1516 | * | |
1517 | * We move the socket address to kernel space before we call | |
1518 | * the protocol layer (having also checked the address is ok). | |
1519 | */ | |
1520 | ||
1521 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) | |
1522 | { | |
1523 | struct socket *sock; | |
1524 | struct sockaddr_storage address; | |
1525 | int err, fput_needed; | |
1526 | ||
1527 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1528 | if (sock) { | |
1529 | err = move_addr_to_kernel(umyaddr, addrlen, &address); | |
1530 | if (err >= 0) { | |
1531 | err = security_socket_bind(sock, | |
1532 | (struct sockaddr *)&address, | |
1533 | addrlen); | |
1534 | if (!err) | |
1535 | err = sock->ops->bind(sock, | |
1536 | (struct sockaddr *) | |
1537 | &address, addrlen); | |
1538 | } | |
1539 | fput_light(sock->file, fput_needed); | |
1540 | } | |
1541 | return err; | |
1542 | } | |
1543 | ||
1544 | /* | |
1545 | * Perform a listen. Basically, we allow the protocol to do anything | |
1546 | * necessary for a listen, and if that works, we mark the socket as | |
1547 | * ready for listening. | |
1548 | */ | |
1549 | ||
1550 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) | |
1551 | { | |
1552 | struct socket *sock; | |
1553 | int err, fput_needed; | |
1554 | int somaxconn; | |
1555 | ||
1556 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1557 | if (sock) { | |
1558 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; | |
1559 | if ((unsigned int)backlog > somaxconn) | |
1560 | backlog = somaxconn; | |
1561 | ||
1562 | err = security_socket_listen(sock, backlog); | |
1563 | if (!err) | |
1564 | err = sock->ops->listen(sock, backlog); | |
1565 | ||
1566 | fput_light(sock->file, fput_needed); | |
1567 | } | |
1568 | return err; | |
1569 | } | |
1570 | ||
1571 | /* | |
1572 | * For accept, we attempt to create a new socket, set up the link | |
1573 | * with the client, wake up the client, then return the new | |
1574 | * connected fd. We collect the address of the connector in kernel | |
1575 | * space and move it to user at the very end. This is unclean because | |
1576 | * we open the socket then return an error. | |
1577 | * | |
1578 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1579 | * status to recvmsg. We need to add that support in a way thats | |
1580 | * clean when we restucture accept also. | |
1581 | */ | |
1582 | ||
1583 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, | |
1584 | int __user *, upeer_addrlen, int, flags) | |
1585 | { | |
1586 | struct socket *sock, *newsock; | |
1587 | struct file *newfile; | |
1588 | int err, len, newfd, fput_needed; | |
1589 | struct sockaddr_storage address; | |
1590 | ||
1591 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) | |
1592 | return -EINVAL; | |
1593 | ||
1594 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1595 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1596 | ||
1597 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1598 | if (!sock) | |
1599 | goto out; | |
1600 | ||
1601 | err = -ENFILE; | |
1602 | newsock = sock_alloc(); | |
1603 | if (!newsock) | |
1604 | goto out_put; | |
1605 | ||
1606 | newsock->type = sock->type; | |
1607 | newsock->ops = sock->ops; | |
1608 | ||
1609 | /* | |
1610 | * We don't need try_module_get here, as the listening socket (sock) | |
1611 | * has the protocol module (sock->ops->owner) held. | |
1612 | */ | |
1613 | __module_get(newsock->ops->owner); | |
1614 | ||
1615 | newfd = get_unused_fd_flags(flags); | |
1616 | if (unlikely(newfd < 0)) { | |
1617 | err = newfd; | |
1618 | sock_release(newsock); | |
1619 | goto out_put; | |
1620 | } | |
1621 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); | |
1622 | if (unlikely(IS_ERR(newfile))) { | |
1623 | err = PTR_ERR(newfile); | |
1624 | put_unused_fd(newfd); | |
1625 | sock_release(newsock); | |
1626 | goto out_put; | |
1627 | } | |
1628 | ||
1629 | err = security_socket_accept(sock, newsock); | |
1630 | if (err) | |
1631 | goto out_fd; | |
1632 | ||
1633 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); | |
1634 | if (err < 0) | |
1635 | goto out_fd; | |
1636 | ||
1637 | if (upeer_sockaddr) { | |
1638 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, | |
1639 | &len, 2) < 0) { | |
1640 | err = -ECONNABORTED; | |
1641 | goto out_fd; | |
1642 | } | |
1643 | err = move_addr_to_user(&address, | |
1644 | len, upeer_sockaddr, upeer_addrlen); | |
1645 | if (err < 0) | |
1646 | goto out_fd; | |
1647 | } | |
1648 | ||
1649 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1650 | ||
1651 | fd_install(newfd, newfile); | |
1652 | err = newfd; | |
1653 | ||
1654 | out_put: | |
1655 | fput_light(sock->file, fput_needed); | |
1656 | out: | |
1657 | return err; | |
1658 | out_fd: | |
1659 | fput(newfile); | |
1660 | put_unused_fd(newfd); | |
1661 | goto out_put; | |
1662 | } | |
1663 | ||
1664 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, | |
1665 | int __user *, upeer_addrlen) | |
1666 | { | |
1667 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); | |
1668 | } | |
1669 | ||
1670 | /* | |
1671 | * Attempt to connect to a socket with the server address. The address | |
1672 | * is in user space so we verify it is OK and move it to kernel space. | |
1673 | * | |
1674 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1675 | * break bindings | |
1676 | * | |
1677 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1678 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1679 | * include the -EINPROGRESS status for such sockets. | |
1680 | */ | |
1681 | ||
1682 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, | |
1683 | int, addrlen) | |
1684 | { | |
1685 | struct socket *sock; | |
1686 | struct sockaddr_storage address; | |
1687 | int err, fput_needed; | |
1688 | ||
1689 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1690 | if (!sock) | |
1691 | goto out; | |
1692 | err = move_addr_to_kernel(uservaddr, addrlen, &address); | |
1693 | if (err < 0) | |
1694 | goto out_put; | |
1695 | ||
1696 | err = | |
1697 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); | |
1698 | if (err) | |
1699 | goto out_put; | |
1700 | ||
1701 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, | |
1702 | sock->file->f_flags); | |
1703 | out_put: | |
1704 | fput_light(sock->file, fput_needed); | |
1705 | out: | |
1706 | return err; | |
1707 | } | |
1708 | ||
1709 | /* | |
1710 | * Get the local address ('name') of a socket object. Move the obtained | |
1711 | * name to user space. | |
1712 | */ | |
1713 | ||
1714 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, | |
1715 | int __user *, usockaddr_len) | |
1716 | { | |
1717 | struct socket *sock; | |
1718 | struct sockaddr_storage address; | |
1719 | int len, err, fput_needed; | |
1720 | ||
1721 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1722 | if (!sock) | |
1723 | goto out; | |
1724 | ||
1725 | err = security_socket_getsockname(sock); | |
1726 | if (err) | |
1727 | goto out_put; | |
1728 | ||
1729 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); | |
1730 | if (err) | |
1731 | goto out_put; | |
1732 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); | |
1733 | ||
1734 | out_put: | |
1735 | fput_light(sock->file, fput_needed); | |
1736 | out: | |
1737 | return err; | |
1738 | } | |
1739 | ||
1740 | /* | |
1741 | * Get the remote address ('name') of a socket object. Move the obtained | |
1742 | * name to user space. | |
1743 | */ | |
1744 | ||
1745 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, | |
1746 | int __user *, usockaddr_len) | |
1747 | { | |
1748 | struct socket *sock; | |
1749 | struct sockaddr_storage address; | |
1750 | int len, err, fput_needed; | |
1751 | ||
1752 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1753 | if (sock != NULL) { | |
1754 | err = security_socket_getpeername(sock); | |
1755 | if (err) { | |
1756 | fput_light(sock->file, fput_needed); | |
1757 | return err; | |
1758 | } | |
1759 | ||
1760 | err = | |
1761 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, | |
1762 | 1); | |
1763 | if (!err) | |
1764 | err = move_addr_to_user(&address, len, usockaddr, | |
1765 | usockaddr_len); | |
1766 | fput_light(sock->file, fput_needed); | |
1767 | } | |
1768 | return err; | |
1769 | } | |
1770 | ||
1771 | /* | |
1772 | * Send a datagram to a given address. We move the address into kernel | |
1773 | * space and check the user space data area is readable before invoking | |
1774 | * the protocol. | |
1775 | */ | |
1776 | ||
1777 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, | |
1778 | unsigned int, flags, struct sockaddr __user *, addr, | |
1779 | int, addr_len) | |
1780 | { | |
1781 | struct socket *sock; | |
1782 | struct sockaddr_storage address; | |
1783 | int err; | |
1784 | struct msghdr msg; | |
1785 | struct iovec iov; | |
1786 | int fput_needed; | |
1787 | ||
1788 | if (len > INT_MAX) | |
1789 | len = INT_MAX; | |
1790 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1791 | if (!sock) | |
1792 | goto out; | |
1793 | ||
1794 | iov.iov_base = buff; | |
1795 | iov.iov_len = len; | |
1796 | msg.msg_name = NULL; | |
1797 | msg.msg_iov = &iov; | |
1798 | msg.msg_iovlen = 1; | |
1799 | msg.msg_control = NULL; | |
1800 | msg.msg_controllen = 0; | |
1801 | msg.msg_namelen = 0; | |
1802 | if (addr) { | |
1803 | err = move_addr_to_kernel(addr, addr_len, &address); | |
1804 | if (err < 0) | |
1805 | goto out_put; | |
1806 | msg.msg_name = (struct sockaddr *)&address; | |
1807 | msg.msg_namelen = addr_len; | |
1808 | } | |
1809 | if (sock->file->f_flags & O_NONBLOCK) | |
1810 | flags |= MSG_DONTWAIT; | |
1811 | msg.msg_flags = flags; | |
1812 | err = sock_sendmsg(sock, &msg, len); | |
1813 | ||
1814 | out_put: | |
1815 | fput_light(sock->file, fput_needed); | |
1816 | out: | |
1817 | return err; | |
1818 | } | |
1819 | ||
1820 | /* | |
1821 | * Send a datagram down a socket. | |
1822 | */ | |
1823 | ||
1824 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, | |
1825 | unsigned int, flags) | |
1826 | { | |
1827 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1828 | } | |
1829 | ||
1830 | /* | |
1831 | * Receive a frame from the socket and optionally record the address of the | |
1832 | * sender. We verify the buffers are writable and if needed move the | |
1833 | * sender address from kernel to user space. | |
1834 | */ | |
1835 | ||
1836 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, | |
1837 | unsigned int, flags, struct sockaddr __user *, addr, | |
1838 | int __user *, addr_len) | |
1839 | { | |
1840 | struct socket *sock; | |
1841 | struct iovec iov; | |
1842 | struct msghdr msg; | |
1843 | struct sockaddr_storage address; | |
1844 | int err, err2; | |
1845 | int fput_needed; | |
1846 | ||
1847 | if (size > INT_MAX) | |
1848 | size = INT_MAX; | |
1849 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1850 | if (!sock) | |
1851 | goto out; | |
1852 | ||
1853 | msg.msg_control = NULL; | |
1854 | msg.msg_controllen = 0; | |
1855 | msg.msg_iovlen = 1; | |
1856 | msg.msg_iov = &iov; | |
1857 | iov.iov_len = size; | |
1858 | iov.iov_base = ubuf; | |
1859 | msg.msg_name = (struct sockaddr *)&address; | |
1860 | msg.msg_namelen = sizeof(address); | |
1861 | if (sock->file->f_flags & O_NONBLOCK) | |
1862 | flags |= MSG_DONTWAIT; | |
1863 | err = sock_recvmsg(sock, &msg, size, flags); | |
1864 | ||
1865 | if (err >= 0 && addr != NULL) { | |
1866 | err2 = move_addr_to_user(&address, | |
1867 | msg.msg_namelen, addr, addr_len); | |
1868 | if (err2 < 0) | |
1869 | err = err2; | |
1870 | } | |
1871 | ||
1872 | fput_light(sock->file, fput_needed); | |
1873 | out: | |
1874 | return err; | |
1875 | } | |
1876 | ||
1877 | /* | |
1878 | * Receive a datagram from a socket. | |
1879 | */ | |
1880 | ||
1881 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, | |
1882 | unsigned int flags) | |
1883 | { | |
1884 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1885 | } | |
1886 | ||
1887 | /* | |
1888 | * Set a socket option. Because we don't know the option lengths we have | |
1889 | * to pass the user mode parameter for the protocols to sort out. | |
1890 | */ | |
1891 | ||
1892 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, | |
1893 | char __user *, optval, int, optlen) | |
1894 | { | |
1895 | int err, fput_needed; | |
1896 | struct socket *sock; | |
1897 | ||
1898 | if (optlen < 0) | |
1899 | return -EINVAL; | |
1900 | ||
1901 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1902 | if (sock != NULL) { | |
1903 | err = security_socket_setsockopt(sock, level, optname); | |
1904 | if (err) | |
1905 | goto out_put; | |
1906 | ||
1907 | if (level == SOL_SOCKET) | |
1908 | err = | |
1909 | sock_setsockopt(sock, level, optname, optval, | |
1910 | optlen); | |
1911 | else | |
1912 | err = | |
1913 | sock->ops->setsockopt(sock, level, optname, optval, | |
1914 | optlen); | |
1915 | out_put: | |
1916 | fput_light(sock->file, fput_needed); | |
1917 | } | |
1918 | return err; | |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * Get a socket option. Because we don't know the option lengths we have | |
1923 | * to pass a user mode parameter for the protocols to sort out. | |
1924 | */ | |
1925 | ||
1926 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, | |
1927 | char __user *, optval, int __user *, optlen) | |
1928 | { | |
1929 | int err, fput_needed; | |
1930 | struct socket *sock; | |
1931 | ||
1932 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1933 | if (sock != NULL) { | |
1934 | err = security_socket_getsockopt(sock, level, optname); | |
1935 | if (err) | |
1936 | goto out_put; | |
1937 | ||
1938 | if (level == SOL_SOCKET) | |
1939 | err = | |
1940 | sock_getsockopt(sock, level, optname, optval, | |
1941 | optlen); | |
1942 | else | |
1943 | err = | |
1944 | sock->ops->getsockopt(sock, level, optname, optval, | |
1945 | optlen); | |
1946 | out_put: | |
1947 | fput_light(sock->file, fput_needed); | |
1948 | } | |
1949 | return err; | |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * Shutdown a socket. | |
1954 | */ | |
1955 | ||
1956 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) | |
1957 | { | |
1958 | int err, fput_needed; | |
1959 | struct socket *sock; | |
1960 | ||
1961 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1962 | if (sock != NULL) { | |
1963 | err = security_socket_shutdown(sock, how); | |
1964 | if (!err) | |
1965 | err = sock->ops->shutdown(sock, how); | |
1966 | fput_light(sock->file, fput_needed); | |
1967 | } | |
1968 | return err; | |
1969 | } | |
1970 | ||
1971 | /* A couple of helpful macros for getting the address of the 32/64 bit | |
1972 | * fields which are the same type (int / unsigned) on our platforms. | |
1973 | */ | |
1974 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1975 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1976 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1977 | ||
1978 | struct used_address { | |
1979 | struct sockaddr_storage name; | |
1980 | unsigned int name_len; | |
1981 | }; | |
1982 | ||
1983 | static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg, | |
1984 | struct msghdr *msg_sys, unsigned int flags, | |
1985 | struct used_address *used_address) | |
1986 | { | |
1987 | struct compat_msghdr __user *msg_compat = | |
1988 | (struct compat_msghdr __user *)msg; | |
1989 | struct sockaddr_storage address; | |
1990 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; | |
1991 | unsigned char ctl[sizeof(struct cmsghdr) + 20] | |
1992 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); | |
1993 | /* 20 is size of ipv6_pktinfo */ | |
1994 | unsigned char *ctl_buf = ctl; | |
1995 | int err, ctl_len, total_len; | |
1996 | ||
1997 | err = -EFAULT; | |
1998 | if (MSG_CMSG_COMPAT & flags) { | |
1999 | if (get_compat_msghdr(msg_sys, msg_compat)) | |
2000 | return -EFAULT; | |
2001 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) | |
2002 | return -EFAULT; | |
2003 | ||
2004 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { | |
2005 | err = -EMSGSIZE; | |
2006 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2007 | goto out; | |
2008 | err = -ENOMEM; | |
2009 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2010 | GFP_KERNEL); | |
2011 | if (!iov) | |
2012 | goto out; | |
2013 | } | |
2014 | ||
2015 | /* This will also move the address data into kernel space */ | |
2016 | if (MSG_CMSG_COMPAT & flags) { | |
2017 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); | |
2018 | } else | |
2019 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); | |
2020 | if (err < 0) | |
2021 | goto out_freeiov; | |
2022 | total_len = err; | |
2023 | ||
2024 | err = -ENOBUFS; | |
2025 | ||
2026 | if (msg_sys->msg_controllen > INT_MAX) | |
2027 | goto out_freeiov; | |
2028 | ctl_len = msg_sys->msg_controllen; | |
2029 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { | |
2030 | err = | |
2031 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, | |
2032 | sizeof(ctl)); | |
2033 | if (err) | |
2034 | goto out_freeiov; | |
2035 | ctl_buf = msg_sys->msg_control; | |
2036 | ctl_len = msg_sys->msg_controllen; | |
2037 | } else if (ctl_len) { | |
2038 | if (ctl_len > sizeof(ctl)) { | |
2039 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); | |
2040 | if (ctl_buf == NULL) | |
2041 | goto out_freeiov; | |
2042 | } | |
2043 | err = -EFAULT; | |
2044 | /* | |
2045 | * Careful! Before this, msg_sys->msg_control contains a user pointer. | |
2046 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted | |
2047 | * checking falls down on this. | |
2048 | */ | |
2049 | if (copy_from_user(ctl_buf, | |
2050 | (void __user __force *)msg_sys->msg_control, | |
2051 | ctl_len)) | |
2052 | goto out_freectl; | |
2053 | msg_sys->msg_control = ctl_buf; | |
2054 | } | |
2055 | msg_sys->msg_flags = flags; | |
2056 | ||
2057 | if (sock->file->f_flags & O_NONBLOCK) | |
2058 | msg_sys->msg_flags |= MSG_DONTWAIT; | |
2059 | /* | |
2060 | * If this is sendmmsg() and current destination address is same as | |
2061 | * previously succeeded address, omit asking LSM's decision. | |
2062 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2063 | * destination address never matches. | |
2064 | */ | |
2065 | if (used_address && msg_sys->msg_name && | |
2066 | used_address->name_len == msg_sys->msg_namelen && | |
2067 | !memcmp(&used_address->name, msg_sys->msg_name, | |
2068 | used_address->name_len)) { | |
2069 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); | |
2070 | goto out_freectl; | |
2071 | } | |
2072 | err = sock_sendmsg(sock, msg_sys, total_len); | |
2073 | /* | |
2074 | * If this is sendmmsg() and sending to current destination address was | |
2075 | * successful, remember it. | |
2076 | */ | |
2077 | if (used_address && err >= 0) { | |
2078 | used_address->name_len = msg_sys->msg_namelen; | |
2079 | if (msg_sys->msg_name) | |
2080 | memcpy(&used_address->name, msg_sys->msg_name, | |
2081 | used_address->name_len); | |
2082 | } | |
2083 | ||
2084 | out_freectl: | |
2085 | if (ctl_buf != ctl) | |
2086 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); | |
2087 | out_freeiov: | |
2088 | if (iov != iovstack) | |
2089 | kfree(iov); | |
2090 | out: | |
2091 | return err; | |
2092 | } | |
2093 | ||
2094 | /* | |
2095 | * BSD sendmsg interface | |
2096 | */ | |
2097 | ||
2098 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) | |
2099 | { | |
2100 | int fput_needed, err; | |
2101 | struct msghdr msg_sys; | |
2102 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2103 | ||
2104 | if (!sock) | |
2105 | goto out; | |
2106 | ||
2107 | err = __sys_sendmsg(sock, msg, &msg_sys, flags, NULL); | |
2108 | ||
2109 | fput_light(sock->file, fput_needed); | |
2110 | out: | |
2111 | return err; | |
2112 | } | |
2113 | ||
2114 | /* | |
2115 | * Linux sendmmsg interface | |
2116 | */ | |
2117 | ||
2118 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2119 | unsigned int flags) | |
2120 | { | |
2121 | int fput_needed, err, datagrams; | |
2122 | struct socket *sock; | |
2123 | struct mmsghdr __user *entry; | |
2124 | struct compat_mmsghdr __user *compat_entry; | |
2125 | struct msghdr msg_sys; | |
2126 | struct used_address used_address; | |
2127 | ||
2128 | if (vlen > UIO_MAXIOV) | |
2129 | vlen = UIO_MAXIOV; | |
2130 | ||
2131 | datagrams = 0; | |
2132 | ||
2133 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2134 | if (!sock) | |
2135 | return err; | |
2136 | ||
2137 | used_address.name_len = UINT_MAX; | |
2138 | entry = mmsg; | |
2139 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
2140 | err = 0; | |
2141 | ||
2142 | while (datagrams < vlen) { | |
2143 | if (MSG_CMSG_COMPAT & flags) { | |
2144 | err = __sys_sendmsg(sock, (struct msghdr __user *)compat_entry, | |
2145 | &msg_sys, flags, &used_address); | |
2146 | if (err < 0) | |
2147 | break; | |
2148 | err = __put_user(err, &compat_entry->msg_len); | |
2149 | ++compat_entry; | |
2150 | } else { | |
2151 | err = __sys_sendmsg(sock, (struct msghdr __user *)entry, | |
2152 | &msg_sys, flags, &used_address); | |
2153 | if (err < 0) | |
2154 | break; | |
2155 | err = put_user(err, &entry->msg_len); | |
2156 | ++entry; | |
2157 | } | |
2158 | ||
2159 | if (err) | |
2160 | break; | |
2161 | ++datagrams; | |
2162 | } | |
2163 | ||
2164 | fput_light(sock->file, fput_needed); | |
2165 | ||
2166 | /* We only return an error if no datagrams were able to be sent */ | |
2167 | if (datagrams != 0) | |
2168 | return datagrams; | |
2169 | ||
2170 | return err; | |
2171 | } | |
2172 | ||
2173 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2174 | unsigned int, vlen, unsigned int, flags) | |
2175 | { | |
2176 | return __sys_sendmmsg(fd, mmsg, vlen, flags); | |
2177 | } | |
2178 | ||
2179 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, | |
2180 | struct msghdr *msg_sys, unsigned int flags, int nosec) | |
2181 | { | |
2182 | struct compat_msghdr __user *msg_compat = | |
2183 | (struct compat_msghdr __user *)msg; | |
2184 | struct iovec iovstack[UIO_FASTIOV]; | |
2185 | struct iovec *iov = iovstack; | |
2186 | unsigned long cmsg_ptr; | |
2187 | int err, total_len, len; | |
2188 | ||
2189 | /* kernel mode address */ | |
2190 | struct sockaddr_storage addr; | |
2191 | ||
2192 | /* user mode address pointers */ | |
2193 | struct sockaddr __user *uaddr; | |
2194 | int __user *uaddr_len; | |
2195 | ||
2196 | if (MSG_CMSG_COMPAT & flags) { | |
2197 | if (get_compat_msghdr(msg_sys, msg_compat)) | |
2198 | return -EFAULT; | |
2199 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) | |
2200 | return -EFAULT; | |
2201 | ||
2202 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { | |
2203 | err = -EMSGSIZE; | |
2204 | if (msg_sys->msg_iovlen > UIO_MAXIOV) | |
2205 | goto out; | |
2206 | err = -ENOMEM; | |
2207 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), | |
2208 | GFP_KERNEL); | |
2209 | if (!iov) | |
2210 | goto out; | |
2211 | } | |
2212 | ||
2213 | /* | |
2214 | * Save the user-mode address (verify_iovec will change the | |
2215 | * kernel msghdr to use the kernel address space) | |
2216 | */ | |
2217 | ||
2218 | uaddr = (__force void __user *)msg_sys->msg_name; | |
2219 | uaddr_len = COMPAT_NAMELEN(msg); | |
2220 | if (MSG_CMSG_COMPAT & flags) { | |
2221 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); | |
2222 | } else | |
2223 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); | |
2224 | if (err < 0) | |
2225 | goto out_freeiov; | |
2226 | total_len = err; | |
2227 | ||
2228 | cmsg_ptr = (unsigned long)msg_sys->msg_control; | |
2229 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
2230 | ||
2231 | if (sock->file->f_flags & O_NONBLOCK) | |
2232 | flags |= MSG_DONTWAIT; | |
2233 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, | |
2234 | total_len, flags); | |
2235 | if (err < 0) | |
2236 | goto out_freeiov; | |
2237 | len = err; | |
2238 | ||
2239 | if (uaddr != NULL) { | |
2240 | err = move_addr_to_user(&addr, | |
2241 | msg_sys->msg_namelen, uaddr, | |
2242 | uaddr_len); | |
2243 | if (err < 0) | |
2244 | goto out_freeiov; | |
2245 | } | |
2246 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), | |
2247 | COMPAT_FLAGS(msg)); | |
2248 | if (err) | |
2249 | goto out_freeiov; | |
2250 | if (MSG_CMSG_COMPAT & flags) | |
2251 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, | |
2252 | &msg_compat->msg_controllen); | |
2253 | else | |
2254 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, | |
2255 | &msg->msg_controllen); | |
2256 | if (err) | |
2257 | goto out_freeiov; | |
2258 | err = len; | |
2259 | ||
2260 | out_freeiov: | |
2261 | if (iov != iovstack) | |
2262 | kfree(iov); | |
2263 | out: | |
2264 | return err; | |
2265 | } | |
2266 | ||
2267 | /* | |
2268 | * BSD recvmsg interface | |
2269 | */ | |
2270 | ||
2271 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2272 | unsigned int, flags) | |
2273 | { | |
2274 | int fput_needed, err; | |
2275 | struct msghdr msg_sys; | |
2276 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2277 | ||
2278 | if (!sock) | |
2279 | goto out; | |
2280 | ||
2281 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2282 | ||
2283 | fput_light(sock->file, fput_needed); | |
2284 | out: | |
2285 | return err; | |
2286 | } | |
2287 | ||
2288 | /* | |
2289 | * Linux recvmmsg interface | |
2290 | */ | |
2291 | ||
2292 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2293 | unsigned int flags, struct timespec *timeout) | |
2294 | { | |
2295 | int fput_needed, err, datagrams; | |
2296 | struct socket *sock; | |
2297 | struct mmsghdr __user *entry; | |
2298 | struct compat_mmsghdr __user *compat_entry; | |
2299 | struct msghdr msg_sys; | |
2300 | struct timespec end_time; | |
2301 | ||
2302 | if (timeout && | |
2303 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2304 | timeout->tv_nsec)) | |
2305 | return -EINVAL; | |
2306 | ||
2307 | datagrams = 0; | |
2308 | ||
2309 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2310 | if (!sock) | |
2311 | return err; | |
2312 | ||
2313 | err = sock_error(sock->sk); | |
2314 | if (err) | |
2315 | goto out_put; | |
2316 | ||
2317 | entry = mmsg; | |
2318 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
2319 | ||
2320 | while (datagrams < vlen) { | |
2321 | /* | |
2322 | * No need to ask LSM for more than the first datagram. | |
2323 | */ | |
2324 | if (MSG_CMSG_COMPAT & flags) { | |
2325 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
2326 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2327 | datagrams); | |
2328 | if (err < 0) | |
2329 | break; | |
2330 | err = __put_user(err, &compat_entry->msg_len); | |
2331 | ++compat_entry; | |
2332 | } else { | |
2333 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
2334 | &msg_sys, flags & ~MSG_WAITFORONE, | |
2335 | datagrams); | |
2336 | if (err < 0) | |
2337 | break; | |
2338 | err = put_user(err, &entry->msg_len); | |
2339 | ++entry; | |
2340 | } | |
2341 | ||
2342 | if (err) | |
2343 | break; | |
2344 | ++datagrams; | |
2345 | ||
2346 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ | |
2347 | if (flags & MSG_WAITFORONE) | |
2348 | flags |= MSG_DONTWAIT; | |
2349 | ||
2350 | if (timeout) { | |
2351 | ktime_get_ts(timeout); | |
2352 | *timeout = timespec_sub(end_time, *timeout); | |
2353 | if (timeout->tv_sec < 0) { | |
2354 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2355 | break; | |
2356 | } | |
2357 | ||
2358 | /* Timeout, return less than vlen datagrams */ | |
2359 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2360 | break; | |
2361 | } | |
2362 | ||
2363 | /* Out of band data, return right away */ | |
2364 | if (msg_sys.msg_flags & MSG_OOB) | |
2365 | break; | |
2366 | } | |
2367 | ||
2368 | out_put: | |
2369 | fput_light(sock->file, fput_needed); | |
2370 | ||
2371 | if (err == 0) | |
2372 | return datagrams; | |
2373 | ||
2374 | if (datagrams != 0) { | |
2375 | /* | |
2376 | * We may return less entries than requested (vlen) if the | |
2377 | * sock is non block and there aren't enough datagrams... | |
2378 | */ | |
2379 | if (err != -EAGAIN) { | |
2380 | /* | |
2381 | * ... or if recvmsg returns an error after we | |
2382 | * received some datagrams, where we record the | |
2383 | * error to return on the next call or if the | |
2384 | * app asks about it using getsockopt(SO_ERROR). | |
2385 | */ | |
2386 | sock->sk->sk_err = -err; | |
2387 | } | |
2388 | ||
2389 | return datagrams; | |
2390 | } | |
2391 | ||
2392 | return err; | |
2393 | } | |
2394 | ||
2395 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2396 | unsigned int, vlen, unsigned int, flags, | |
2397 | struct timespec __user *, timeout) | |
2398 | { | |
2399 | int datagrams; | |
2400 | struct timespec timeout_sys; | |
2401 | ||
2402 | if (!timeout) | |
2403 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2404 | ||
2405 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2406 | return -EFAULT; | |
2407 | ||
2408 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2409 | ||
2410 | if (datagrams > 0 && | |
2411 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2412 | datagrams = -EFAULT; | |
2413 | ||
2414 | return datagrams; | |
2415 | } | |
2416 | ||
2417 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
2418 | /* Argument list sizes for sys_socketcall */ | |
2419 | #define AL(x) ((x) * sizeof(unsigned long)) | |
2420 | static const unsigned char nargs[21] = { | |
2421 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), | |
2422 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2423 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
2424 | AL(4), AL(5), AL(4) | |
2425 | }; | |
2426 | ||
2427 | #undef AL | |
2428 | ||
2429 | /* | |
2430 | * System call vectors. | |
2431 | * | |
2432 | * Argument checking cleaned up. Saved 20% in size. | |
2433 | * This function doesn't need to set the kernel lock because | |
2434 | * it is set by the callees. | |
2435 | */ | |
2436 | ||
2437 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) | |
2438 | { | |
2439 | unsigned long a[6]; | |
2440 | unsigned long a0, a1; | |
2441 | int err; | |
2442 | unsigned int len; | |
2443 | ||
2444 | if (call < 1 || call > SYS_SENDMMSG) | |
2445 | return -EINVAL; | |
2446 | ||
2447 | len = nargs[call]; | |
2448 | if (len > sizeof(a)) | |
2449 | return -EINVAL; | |
2450 | ||
2451 | /* copy_from_user should be SMP safe. */ | |
2452 | if (copy_from_user(a, args, len)) | |
2453 | return -EFAULT; | |
2454 | ||
2455 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); | |
2456 | ||
2457 | a0 = a[0]; | |
2458 | a1 = a[1]; | |
2459 | ||
2460 | switch (call) { | |
2461 | case SYS_SOCKET: | |
2462 | err = sys_socket(a0, a1, a[2]); | |
2463 | break; | |
2464 | case SYS_BIND: | |
2465 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2466 | break; | |
2467 | case SYS_CONNECT: | |
2468 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2469 | break; | |
2470 | case SYS_LISTEN: | |
2471 | err = sys_listen(a0, a1); | |
2472 | break; | |
2473 | case SYS_ACCEPT: | |
2474 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2475 | (int __user *)a[2], 0); | |
2476 | break; | |
2477 | case SYS_GETSOCKNAME: | |
2478 | err = | |
2479 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2480 | (int __user *)a[2]); | |
2481 | break; | |
2482 | case SYS_GETPEERNAME: | |
2483 | err = | |
2484 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2485 | (int __user *)a[2]); | |
2486 | break; | |
2487 | case SYS_SOCKETPAIR: | |
2488 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2489 | break; | |
2490 | case SYS_SEND: | |
2491 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2492 | break; | |
2493 | case SYS_SENDTO: | |
2494 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2495 | (struct sockaddr __user *)a[4], a[5]); | |
2496 | break; | |
2497 | case SYS_RECV: | |
2498 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2499 | break; | |
2500 | case SYS_RECVFROM: | |
2501 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2502 | (struct sockaddr __user *)a[4], | |
2503 | (int __user *)a[5]); | |
2504 | break; | |
2505 | case SYS_SHUTDOWN: | |
2506 | err = sys_shutdown(a0, a1); | |
2507 | break; | |
2508 | case SYS_SETSOCKOPT: | |
2509 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2510 | break; | |
2511 | case SYS_GETSOCKOPT: | |
2512 | err = | |
2513 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2514 | (int __user *)a[4]); | |
2515 | break; | |
2516 | case SYS_SENDMSG: | |
2517 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2518 | break; | |
2519 | case SYS_SENDMMSG: | |
2520 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2521 | break; | |
2522 | case SYS_RECVMSG: | |
2523 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2524 | break; | |
2525 | case SYS_RECVMMSG: | |
2526 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2527 | (struct timespec __user *)a[4]); | |
2528 | break; | |
2529 | case SYS_ACCEPT4: | |
2530 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2531 | (int __user *)a[2], a[3]); | |
2532 | break; | |
2533 | default: | |
2534 | err = -EINVAL; | |
2535 | break; | |
2536 | } | |
2537 | return err; | |
2538 | } | |
2539 | ||
2540 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ | |
2541 | ||
2542 | /** | |
2543 | * sock_register - add a socket protocol handler | |
2544 | * @ops: description of protocol | |
2545 | * | |
2546 | * This function is called by a protocol handler that wants to | |
2547 | * advertise its address family, and have it linked into the | |
2548 | * socket interface. The value ops->family coresponds to the | |
2549 | * socket system call protocol family. | |
2550 | */ | |
2551 | int sock_register(const struct net_proto_family *ops) | |
2552 | { | |
2553 | int err; | |
2554 | ||
2555 | if (ops->family >= NPROTO) { | |
2556 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, | |
2557 | NPROTO); | |
2558 | return -ENOBUFS; | |
2559 | } | |
2560 | ||
2561 | spin_lock(&net_family_lock); | |
2562 | if (rcu_dereference_protected(net_families[ops->family], | |
2563 | lockdep_is_held(&net_family_lock))) | |
2564 | err = -EEXIST; | |
2565 | else { | |
2566 | rcu_assign_pointer(net_families[ops->family], ops); | |
2567 | err = 0; | |
2568 | } | |
2569 | spin_unlock(&net_family_lock); | |
2570 | ||
2571 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); | |
2572 | return err; | |
2573 | } | |
2574 | EXPORT_SYMBOL(sock_register); | |
2575 | ||
2576 | /** | |
2577 | * sock_unregister - remove a protocol handler | |
2578 | * @family: protocol family to remove | |
2579 | * | |
2580 | * This function is called by a protocol handler that wants to | |
2581 | * remove its address family, and have it unlinked from the | |
2582 | * new socket creation. | |
2583 | * | |
2584 | * If protocol handler is a module, then it can use module reference | |
2585 | * counts to protect against new references. If protocol handler is not | |
2586 | * a module then it needs to provide its own protection in | |
2587 | * the ops->create routine. | |
2588 | */ | |
2589 | void sock_unregister(int family) | |
2590 | { | |
2591 | BUG_ON(family < 0 || family >= NPROTO); | |
2592 | ||
2593 | spin_lock(&net_family_lock); | |
2594 | RCU_INIT_POINTER(net_families[family], NULL); | |
2595 | spin_unlock(&net_family_lock); | |
2596 | ||
2597 | synchronize_rcu(); | |
2598 | ||
2599 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); | |
2600 | } | |
2601 | EXPORT_SYMBOL(sock_unregister); | |
2602 | ||
2603 | static int __init sock_init(void) | |
2604 | { | |
2605 | int err; | |
2606 | /* | |
2607 | * Initialize the network sysctl infrastructure. | |
2608 | */ | |
2609 | err = net_sysctl_init(); | |
2610 | if (err) | |
2611 | goto out; | |
2612 | ||
2613 | /* | |
2614 | * Initialize skbuff SLAB cache | |
2615 | */ | |
2616 | skb_init(); | |
2617 | ||
2618 | /* | |
2619 | * Initialize the protocols module. | |
2620 | */ | |
2621 | ||
2622 | init_inodecache(); | |
2623 | ||
2624 | err = register_filesystem(&sock_fs_type); | |
2625 | if (err) | |
2626 | goto out_fs; | |
2627 | sock_mnt = kern_mount(&sock_fs_type); | |
2628 | if (IS_ERR(sock_mnt)) { | |
2629 | err = PTR_ERR(sock_mnt); | |
2630 | goto out_mount; | |
2631 | } | |
2632 | ||
2633 | /* The real protocol initialization is performed in later initcalls. | |
2634 | */ | |
2635 | ||
2636 | #ifdef CONFIG_NETFILTER | |
2637 | netfilter_init(); | |
2638 | #endif | |
2639 | ||
2640 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING | |
2641 | skb_timestamping_init(); | |
2642 | #endif | |
2643 | ||
2644 | out: | |
2645 | return err; | |
2646 | ||
2647 | out_mount: | |
2648 | unregister_filesystem(&sock_fs_type); | |
2649 | out_fs: | |
2650 | goto out; | |
2651 | } | |
2652 | ||
2653 | core_initcall(sock_init); /* early initcall */ | |
2654 | ||
2655 | #ifdef CONFIG_PROC_FS | |
2656 | void socket_seq_show(struct seq_file *seq) | |
2657 | { | |
2658 | int cpu; | |
2659 | int counter = 0; | |
2660 | ||
2661 | for_each_possible_cpu(cpu) | |
2662 | counter += per_cpu(sockets_in_use, cpu); | |
2663 | ||
2664 | /* It can be negative, by the way. 8) */ | |
2665 | if (counter < 0) | |
2666 | counter = 0; | |
2667 | ||
2668 | seq_printf(seq, "sockets: used %d\n", counter); | |
2669 | } | |
2670 | #endif /* CONFIG_PROC_FS */ | |
2671 | ||
2672 | #ifdef CONFIG_COMPAT | |
2673 | static int do_siocgstamp(struct net *net, struct socket *sock, | |
2674 | unsigned int cmd, void __user *up) | |
2675 | { | |
2676 | mm_segment_t old_fs = get_fs(); | |
2677 | struct timeval ktv; | |
2678 | int err; | |
2679 | ||
2680 | set_fs(KERNEL_DS); | |
2681 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); | |
2682 | set_fs(old_fs); | |
2683 | if (!err) | |
2684 | err = compat_put_timeval(&ktv, up); | |
2685 | ||
2686 | return err; | |
2687 | } | |
2688 | ||
2689 | static int do_siocgstampns(struct net *net, struct socket *sock, | |
2690 | unsigned int cmd, void __user *up) | |
2691 | { | |
2692 | mm_segment_t old_fs = get_fs(); | |
2693 | struct timespec kts; | |
2694 | int err; | |
2695 | ||
2696 | set_fs(KERNEL_DS); | |
2697 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); | |
2698 | set_fs(old_fs); | |
2699 | if (!err) | |
2700 | err = compat_put_timespec(&kts, up); | |
2701 | ||
2702 | return err; | |
2703 | } | |
2704 | ||
2705 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) | |
2706 | { | |
2707 | struct ifreq __user *uifr; | |
2708 | int err; | |
2709 | ||
2710 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
2711 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2712 | return -EFAULT; | |
2713 | ||
2714 | err = dev_ioctl(net, SIOCGIFNAME, uifr); | |
2715 | if (err) | |
2716 | return err; | |
2717 | ||
2718 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) | |
2719 | return -EFAULT; | |
2720 | ||
2721 | return 0; | |
2722 | } | |
2723 | ||
2724 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) | |
2725 | { | |
2726 | struct compat_ifconf ifc32; | |
2727 | struct ifconf ifc; | |
2728 | struct ifconf __user *uifc; | |
2729 | struct compat_ifreq __user *ifr32; | |
2730 | struct ifreq __user *ifr; | |
2731 | unsigned int i, j; | |
2732 | int err; | |
2733 | ||
2734 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) | |
2735 | return -EFAULT; | |
2736 | ||
2737 | memset(&ifc, 0, sizeof(ifc)); | |
2738 | if (ifc32.ifcbuf == 0) { | |
2739 | ifc32.ifc_len = 0; | |
2740 | ifc.ifc_len = 0; | |
2741 | ifc.ifc_req = NULL; | |
2742 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2743 | } else { | |
2744 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * | |
2745 | sizeof(struct ifreq); | |
2746 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); | |
2747 | ifc.ifc_len = len; | |
2748 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2749 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2750 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { | |
2751 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) | |
2752 | return -EFAULT; | |
2753 | ifr++; | |
2754 | ifr32++; | |
2755 | } | |
2756 | } | |
2757 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2758 | return -EFAULT; | |
2759 | ||
2760 | err = dev_ioctl(net, SIOCGIFCONF, uifc); | |
2761 | if (err) | |
2762 | return err; | |
2763 | ||
2764 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2765 | return -EFAULT; | |
2766 | ||
2767 | ifr = ifc.ifc_req; | |
2768 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2769 | for (i = 0, j = 0; | |
2770 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; | |
2771 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2772 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
2773 | return -EFAULT; | |
2774 | ifr32++; | |
2775 | ifr++; | |
2776 | } | |
2777 | ||
2778 | if (ifc32.ifcbuf == 0) { | |
2779 | /* Translate from 64-bit structure multiple to | |
2780 | * a 32-bit one. | |
2781 | */ | |
2782 | i = ifc.ifc_len; | |
2783 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); | |
2784 | ifc32.ifc_len = i; | |
2785 | } else { | |
2786 | ifc32.ifc_len = i; | |
2787 | } | |
2788 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) | |
2789 | return -EFAULT; | |
2790 | ||
2791 | return 0; | |
2792 | } | |
2793 | ||
2794 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) | |
2795 | { | |
2796 | struct compat_ethtool_rxnfc __user *compat_rxnfc; | |
2797 | bool convert_in = false, convert_out = false; | |
2798 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2799 | struct ethtool_rxnfc __user *rxnfc; | |
2800 | struct ifreq __user *ifr; | |
2801 | u32 rule_cnt = 0, actual_rule_cnt; | |
2802 | u32 ethcmd; | |
2803 | u32 data; | |
2804 | int ret; | |
2805 | ||
2806 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2807 | return -EFAULT; | |
2808 | ||
2809 | compat_rxnfc = compat_ptr(data); | |
2810 | ||
2811 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
2812 | return -EFAULT; | |
2813 | ||
2814 | /* Most ethtool structures are defined without padding. | |
2815 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2816 | */ | |
2817 | switch (ethcmd) { | |
2818 | default: | |
2819 | break; | |
2820 | case ETHTOOL_GRXCLSRLALL: | |
2821 | /* Buffer size is variable */ | |
2822 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2823 | return -EFAULT; | |
2824 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2825 | return -ENOMEM; | |
2826 | buf_size += rule_cnt * sizeof(u32); | |
2827 | /* fall through */ | |
2828 | case ETHTOOL_GRXRINGS: | |
2829 | case ETHTOOL_GRXCLSRLCNT: | |
2830 | case ETHTOOL_GRXCLSRULE: | |
2831 | case ETHTOOL_SRXCLSRLINS: | |
2832 | convert_out = true; | |
2833 | /* fall through */ | |
2834 | case ETHTOOL_SRXCLSRLDEL: | |
2835 | buf_size += sizeof(struct ethtool_rxnfc); | |
2836 | convert_in = true; | |
2837 | break; | |
2838 | } | |
2839 | ||
2840 | ifr = compat_alloc_user_space(buf_size); | |
2841 | rxnfc = (void *)ifr + ALIGN(sizeof(struct ifreq), 8); | |
2842 | ||
2843 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2844 | return -EFAULT; | |
2845 | ||
2846 | if (put_user(convert_in ? rxnfc : compat_ptr(data), | |
2847 | &ifr->ifr_ifru.ifru_data)) | |
2848 | return -EFAULT; | |
2849 | ||
2850 | if (convert_in) { | |
2851 | /* We expect there to be holes between fs.m_ext and | |
2852 | * fs.ring_cookie and at the end of fs, but nowhere else. | |
2853 | */ | |
2854 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + | |
2855 | sizeof(compat_rxnfc->fs.m_ext) != | |
2856 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2857 | sizeof(rxnfc->fs.m_ext)); | |
2858 | BUILD_BUG_ON( | |
2859 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2860 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2861 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2862 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2863 | ||
2864 | if (copy_in_user(rxnfc, compat_rxnfc, | |
2865 | (void *)(&rxnfc->fs.m_ext + 1) - | |
2866 | (void *)rxnfc) || | |
2867 | copy_in_user(&rxnfc->fs.ring_cookie, | |
2868 | &compat_rxnfc->fs.ring_cookie, | |
2869 | (void *)(&rxnfc->fs.location + 1) - | |
2870 | (void *)&rxnfc->fs.ring_cookie) || | |
2871 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, | |
2872 | sizeof(rxnfc->rule_cnt))) | |
2873 | return -EFAULT; | |
2874 | } | |
2875 | ||
2876 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2877 | if (ret) | |
2878 | return ret; | |
2879 | ||
2880 | if (convert_out) { | |
2881 | if (copy_in_user(compat_rxnfc, rxnfc, | |
2882 | (const void *)(&rxnfc->fs.m_ext + 1) - | |
2883 | (const void *)rxnfc) || | |
2884 | copy_in_user(&compat_rxnfc->fs.ring_cookie, | |
2885 | &rxnfc->fs.ring_cookie, | |
2886 | (const void *)(&rxnfc->fs.location + 1) - | |
2887 | (const void *)&rxnfc->fs.ring_cookie) || | |
2888 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, | |
2889 | sizeof(rxnfc->rule_cnt))) | |
2890 | return -EFAULT; | |
2891 | ||
2892 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2893 | /* As an optimisation, we only copy the actual | |
2894 | * number of rules that the underlying | |
2895 | * function returned. Since Mallory might | |
2896 | * change the rule count in user memory, we | |
2897 | * check that it is less than the rule count | |
2898 | * originally given (as the user buffer size), | |
2899 | * which has been range-checked. | |
2900 | */ | |
2901 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2902 | return -EFAULT; | |
2903 | if (actual_rule_cnt < rule_cnt) | |
2904 | rule_cnt = actual_rule_cnt; | |
2905 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2906 | &rxnfc->rule_locs[0], | |
2907 | rule_cnt * sizeof(u32))) | |
2908 | return -EFAULT; | |
2909 | } | |
2910 | } | |
2911 | ||
2912 | return 0; | |
2913 | } | |
2914 | ||
2915 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) | |
2916 | { | |
2917 | void __user *uptr; | |
2918 | compat_uptr_t uptr32; | |
2919 | struct ifreq __user *uifr; | |
2920 | ||
2921 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2922 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
2923 | return -EFAULT; | |
2924 | ||
2925 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2926 | return -EFAULT; | |
2927 | ||
2928 | uptr = compat_ptr(uptr32); | |
2929 | ||
2930 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2931 | return -EFAULT; | |
2932 | ||
2933 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2934 | } | |
2935 | ||
2936 | static int bond_ioctl(struct net *net, unsigned int cmd, | |
2937 | struct compat_ifreq __user *ifr32) | |
2938 | { | |
2939 | struct ifreq kifr; | |
2940 | struct ifreq __user *uifr; | |
2941 | mm_segment_t old_fs; | |
2942 | int err; | |
2943 | u32 data; | |
2944 | void __user *datap; | |
2945 | ||
2946 | switch (cmd) { | |
2947 | case SIOCBONDENSLAVE: | |
2948 | case SIOCBONDRELEASE: | |
2949 | case SIOCBONDSETHWADDR: | |
2950 | case SIOCBONDCHANGEACTIVE: | |
2951 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) | |
2952 | return -EFAULT; | |
2953 | ||
2954 | old_fs = get_fs(); | |
2955 | set_fs(KERNEL_DS); | |
2956 | err = dev_ioctl(net, cmd, | |
2957 | (struct ifreq __user __force *) &kifr); | |
2958 | set_fs(old_fs); | |
2959 | ||
2960 | return err; | |
2961 | case SIOCBONDSLAVEINFOQUERY: | |
2962 | case SIOCBONDINFOQUERY: | |
2963 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2964 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2965 | return -EFAULT; | |
2966 | ||
2967 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2968 | return -EFAULT; | |
2969 | ||
2970 | datap = compat_ptr(data); | |
2971 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2972 | return -EFAULT; | |
2973 | ||
2974 | return dev_ioctl(net, cmd, uifr); | |
2975 | default: | |
2976 | return -ENOIOCTLCMD; | |
2977 | } | |
2978 | } | |
2979 | ||
2980 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, | |
2981 | struct compat_ifreq __user *u_ifreq32) | |
2982 | { | |
2983 | struct ifreq __user *u_ifreq64; | |
2984 | char tmp_buf[IFNAMSIZ]; | |
2985 | void __user *data64; | |
2986 | u32 data32; | |
2987 | ||
2988 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2989 | IFNAMSIZ)) | |
2990 | return -EFAULT; | |
2991 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2992 | return -EFAULT; | |
2993 | data64 = compat_ptr(data32); | |
2994 | ||
2995 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2996 | ||
2997 | /* Don't check these user accesses, just let that get trapped | |
2998 | * in the ioctl handler instead. | |
2999 | */ | |
3000 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
3001 | IFNAMSIZ)) | |
3002 | return -EFAULT; | |
3003 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
3004 | return -EFAULT; | |
3005 | ||
3006 | return dev_ioctl(net, cmd, u_ifreq64); | |
3007 | } | |
3008 | ||
3009 | static int dev_ifsioc(struct net *net, struct socket *sock, | |
3010 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
3011 | { | |
3012 | struct ifreq __user *uifr; | |
3013 | int err; | |
3014 | ||
3015 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
3016 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
3017 | return -EFAULT; | |
3018 | ||
3019 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
3020 | ||
3021 | if (!err) { | |
3022 | switch (cmd) { | |
3023 | case SIOCGIFFLAGS: | |
3024 | case SIOCGIFMETRIC: | |
3025 | case SIOCGIFMTU: | |
3026 | case SIOCGIFMEM: | |
3027 | case SIOCGIFHWADDR: | |
3028 | case SIOCGIFINDEX: | |
3029 | case SIOCGIFADDR: | |
3030 | case SIOCGIFBRDADDR: | |
3031 | case SIOCGIFDSTADDR: | |
3032 | case SIOCGIFNETMASK: | |
3033 | case SIOCGIFPFLAGS: | |
3034 | case SIOCGIFTXQLEN: | |
3035 | case SIOCGMIIPHY: | |
3036 | case SIOCGMIIREG: | |
3037 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) | |
3038 | err = -EFAULT; | |
3039 | break; | |
3040 | } | |
3041 | } | |
3042 | return err; | |
3043 | } | |
3044 | ||
3045 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, | |
3046 | struct compat_ifreq __user *uifr32) | |
3047 | { | |
3048 | struct ifreq ifr; | |
3049 | struct compat_ifmap __user *uifmap32; | |
3050 | mm_segment_t old_fs; | |
3051 | int err; | |
3052 | ||
3053 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3054 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3055 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3056 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3057 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3058 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3059 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3060 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
3061 | if (err) | |
3062 | return -EFAULT; | |
3063 | ||
3064 | old_fs = get_fs(); | |
3065 | set_fs(KERNEL_DS); | |
3066 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); | |
3067 | set_fs(old_fs); | |
3068 | ||
3069 | if (cmd == SIOCGIFMAP && !err) { | |
3070 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3071 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
3072 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3073 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3074 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3075 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3076 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
3077 | if (err) | |
3078 | err = -EFAULT; | |
3079 | } | |
3080 | return err; | |
3081 | } | |
3082 | ||
3083 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
3084 | { | |
3085 | void __user *uptr; | |
3086 | compat_uptr_t uptr32; | |
3087 | struct ifreq __user *uifr; | |
3088 | ||
3089 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
3090 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) | |
3091 | return -EFAULT; | |
3092 | ||
3093 | if (get_user(uptr32, &uifr32->ifr_data)) | |
3094 | return -EFAULT; | |
3095 | ||
3096 | uptr = compat_ptr(uptr32); | |
3097 | ||
3098 | if (put_user(uptr, &uifr->ifr_data)) | |
3099 | return -EFAULT; | |
3100 | ||
3101 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
3102 | } | |
3103 | ||
3104 | struct rtentry32 { | |
3105 | u32 rt_pad1; | |
3106 | struct sockaddr rt_dst; /* target address */ | |
3107 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3108 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
3109 | unsigned short rt_flags; | |
3110 | short rt_pad2; | |
3111 | u32 rt_pad3; | |
3112 | unsigned char rt_tos; | |
3113 | unsigned char rt_class; | |
3114 | short rt_pad4; | |
3115 | short rt_metric; /* +1 for binary compatibility! */ | |
3116 | /* char * */ u32 rt_dev; /* forcing the device at add */ | |
3117 | u32 rt_mtu; /* per route MTU/Window */ | |
3118 | u32 rt_window; /* Window clamping */ | |
3119 | unsigned short rt_irtt; /* Initial RTT */ | |
3120 | }; | |
3121 | ||
3122 | struct in6_rtmsg32 { | |
3123 | struct in6_addr rtmsg_dst; | |
3124 | struct in6_addr rtmsg_src; | |
3125 | struct in6_addr rtmsg_gateway; | |
3126 | u32 rtmsg_type; | |
3127 | u16 rtmsg_dst_len; | |
3128 | u16 rtmsg_src_len; | |
3129 | u32 rtmsg_metric; | |
3130 | u32 rtmsg_info; | |
3131 | u32 rtmsg_flags; | |
3132 | s32 rtmsg_ifindex; | |
3133 | }; | |
3134 | ||
3135 | static int routing_ioctl(struct net *net, struct socket *sock, | |
3136 | unsigned int cmd, void __user *argp) | |
3137 | { | |
3138 | int ret; | |
3139 | void *r = NULL; | |
3140 | struct in6_rtmsg r6; | |
3141 | struct rtentry r4; | |
3142 | char devname[16]; | |
3143 | u32 rtdev; | |
3144 | mm_segment_t old_fs = get_fs(); | |
3145 | ||
3146 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ | |
3147 | struct in6_rtmsg32 __user *ur6 = argp; | |
3148 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), | |
3149 | 3 * sizeof(struct in6_addr)); | |
3150 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); | |
3151 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3152 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3153 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3154 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3155 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3156 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
3157 | ||
3158 | r = (void *) &r6; | |
3159 | } else { /* ipv4 */ | |
3160 | struct rtentry32 __user *ur4 = argp; | |
3161 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), | |
3162 | 3 * sizeof(struct sockaddr)); | |
3163 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); | |
3164 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3165 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3166 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
3167 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3168 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
3169 | if (rtdev) { | |
3170 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); | |
3171 | r4.rt_dev = (char __user __force *)devname; | |
3172 | devname[15] = 0; | |
3173 | } else | |
3174 | r4.rt_dev = NULL; | |
3175 | ||
3176 | r = (void *) &r4; | |
3177 | } | |
3178 | ||
3179 | if (ret) { | |
3180 | ret = -EFAULT; | |
3181 | goto out; | |
3182 | } | |
3183 | ||
3184 | set_fs(KERNEL_DS); | |
3185 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); | |
3186 | set_fs(old_fs); | |
3187 | ||
3188 | out: | |
3189 | return ret; | |
3190 | } | |
3191 | ||
3192 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3193 | * for some operations; this forces use of the newer bridge-utils that | |
3194 | * use compatible ioctls | |
3195 | */ | |
3196 | static int old_bridge_ioctl(compat_ulong_t __user *argp) | |
3197 | { | |
3198 | compat_ulong_t tmp; | |
3199 | ||
3200 | if (get_user(tmp, argp)) | |
3201 | return -EFAULT; | |
3202 | if (tmp == BRCTL_GET_VERSION) | |
3203 | return BRCTL_VERSION + 1; | |
3204 | return -EINVAL; | |
3205 | } | |
3206 | ||
3207 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, | |
3208 | unsigned int cmd, unsigned long arg) | |
3209 | { | |
3210 | void __user *argp = compat_ptr(arg); | |
3211 | struct sock *sk = sock->sk; | |
3212 | struct net *net = sock_net(sk); | |
3213 | ||
3214 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) | |
3215 | return siocdevprivate_ioctl(net, cmd, argp); | |
3216 | ||
3217 | switch (cmd) { | |
3218 | case SIOCSIFBR: | |
3219 | case SIOCGIFBR: | |
3220 | return old_bridge_ioctl(argp); | |
3221 | case SIOCGIFNAME: | |
3222 | return dev_ifname32(net, argp); | |
3223 | case SIOCGIFCONF: | |
3224 | return dev_ifconf(net, argp); | |
3225 | case SIOCETHTOOL: | |
3226 | return ethtool_ioctl(net, argp); | |
3227 | case SIOCWANDEV: | |
3228 | return compat_siocwandev(net, argp); | |
3229 | case SIOCGIFMAP: | |
3230 | case SIOCSIFMAP: | |
3231 | return compat_sioc_ifmap(net, cmd, argp); | |
3232 | case SIOCBONDENSLAVE: | |
3233 | case SIOCBONDRELEASE: | |
3234 | case SIOCBONDSETHWADDR: | |
3235 | case SIOCBONDSLAVEINFOQUERY: | |
3236 | case SIOCBONDINFOQUERY: | |
3237 | case SIOCBONDCHANGEACTIVE: | |
3238 | return bond_ioctl(net, cmd, argp); | |
3239 | case SIOCADDRT: | |
3240 | case SIOCDELRT: | |
3241 | return routing_ioctl(net, sock, cmd, argp); | |
3242 | case SIOCGSTAMP: | |
3243 | return do_siocgstamp(net, sock, cmd, argp); | |
3244 | case SIOCGSTAMPNS: | |
3245 | return do_siocgstampns(net, sock, cmd, argp); | |
3246 | case SIOCSHWTSTAMP: | |
3247 | return compat_siocshwtstamp(net, argp); | |
3248 | ||
3249 | case FIOSETOWN: | |
3250 | case SIOCSPGRP: | |
3251 | case FIOGETOWN: | |
3252 | case SIOCGPGRP: | |
3253 | case SIOCBRADDBR: | |
3254 | case SIOCBRDELBR: | |
3255 | case SIOCGIFVLAN: | |
3256 | case SIOCSIFVLAN: | |
3257 | case SIOCADDDLCI: | |
3258 | case SIOCDELDLCI: | |
3259 | return sock_ioctl(file, cmd, arg); | |
3260 | ||
3261 | case SIOCGIFFLAGS: | |
3262 | case SIOCSIFFLAGS: | |
3263 | case SIOCGIFMETRIC: | |
3264 | case SIOCSIFMETRIC: | |
3265 | case SIOCGIFMTU: | |
3266 | case SIOCSIFMTU: | |
3267 | case SIOCGIFMEM: | |
3268 | case SIOCSIFMEM: | |
3269 | case SIOCGIFHWADDR: | |
3270 | case SIOCSIFHWADDR: | |
3271 | case SIOCADDMULTI: | |
3272 | case SIOCDELMULTI: | |
3273 | case SIOCGIFINDEX: | |
3274 | case SIOCGIFADDR: | |
3275 | case SIOCSIFADDR: | |
3276 | case SIOCSIFHWBROADCAST: | |
3277 | case SIOCDIFADDR: | |
3278 | case SIOCGIFBRDADDR: | |
3279 | case SIOCSIFBRDADDR: | |
3280 | case SIOCGIFDSTADDR: | |
3281 | case SIOCSIFDSTADDR: | |
3282 | case SIOCGIFNETMASK: | |
3283 | case SIOCSIFNETMASK: | |
3284 | case SIOCSIFPFLAGS: | |
3285 | case SIOCGIFPFLAGS: | |
3286 | case SIOCGIFTXQLEN: | |
3287 | case SIOCSIFTXQLEN: | |
3288 | case SIOCBRADDIF: | |
3289 | case SIOCBRDELIF: | |
3290 | case SIOCSIFNAME: | |
3291 | case SIOCGMIIPHY: | |
3292 | case SIOCGMIIREG: | |
3293 | case SIOCSMIIREG: | |
3294 | return dev_ifsioc(net, sock, cmd, argp); | |
3295 | ||
3296 | case SIOCSARP: | |
3297 | case SIOCGARP: | |
3298 | case SIOCDARP: | |
3299 | case SIOCATMARK: | |
3300 | return sock_do_ioctl(net, sock, cmd, arg); | |
3301 | } | |
3302 | ||
3303 | return -ENOIOCTLCMD; | |
3304 | } | |
3305 | ||
3306 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, | |
3307 | unsigned long arg) | |
3308 | { | |
3309 | struct socket *sock = file->private_data; | |
3310 | int ret = -ENOIOCTLCMD; | |
3311 | struct sock *sk; | |
3312 | struct net *net; | |
3313 | ||
3314 | sk = sock->sk; | |
3315 | net = sock_net(sk); | |
3316 | ||
3317 | if (sock->ops->compat_ioctl) | |
3318 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3319 | ||
3320 | if (ret == -ENOIOCTLCMD && | |
3321 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3322 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3323 | ||
3324 | if (ret == -ENOIOCTLCMD) | |
3325 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3326 | ||
3327 | return ret; | |
3328 | } | |
3329 | #endif | |
3330 | ||
3331 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) | |
3332 | { | |
3333 | return sock->ops->bind(sock, addr, addrlen); | |
3334 | } | |
3335 | EXPORT_SYMBOL(kernel_bind); | |
3336 | ||
3337 | int kernel_listen(struct socket *sock, int backlog) | |
3338 | { | |
3339 | return sock->ops->listen(sock, backlog); | |
3340 | } | |
3341 | EXPORT_SYMBOL(kernel_listen); | |
3342 | ||
3343 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3344 | { | |
3345 | struct sock *sk = sock->sk; | |
3346 | int err; | |
3347 | ||
3348 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3349 | newsock); | |
3350 | if (err < 0) | |
3351 | goto done; | |
3352 | ||
3353 | err = sock->ops->accept(sock, *newsock, flags); | |
3354 | if (err < 0) { | |
3355 | sock_release(*newsock); | |
3356 | *newsock = NULL; | |
3357 | goto done; | |
3358 | } | |
3359 | ||
3360 | (*newsock)->ops = sock->ops; | |
3361 | __module_get((*newsock)->ops->owner); | |
3362 | ||
3363 | done: | |
3364 | return err; | |
3365 | } | |
3366 | EXPORT_SYMBOL(kernel_accept); | |
3367 | ||
3368 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
3369 | int flags) | |
3370 | { | |
3371 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3372 | } | |
3373 | EXPORT_SYMBOL(kernel_connect); | |
3374 | ||
3375 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3376 | int *addrlen) | |
3377 | { | |
3378 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3379 | } | |
3380 | EXPORT_SYMBOL(kernel_getsockname); | |
3381 | ||
3382 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3383 | int *addrlen) | |
3384 | { | |
3385 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3386 | } | |
3387 | EXPORT_SYMBOL(kernel_getpeername); | |
3388 | ||
3389 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3390 | char *optval, int *optlen) | |
3391 | { | |
3392 | mm_segment_t oldfs = get_fs(); | |
3393 | char __user *uoptval; | |
3394 | int __user *uoptlen; | |
3395 | int err; | |
3396 | ||
3397 | uoptval = (char __user __force *) optval; | |
3398 | uoptlen = (int __user __force *) optlen; | |
3399 | ||
3400 | set_fs(KERNEL_DS); | |
3401 | if (level == SOL_SOCKET) | |
3402 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); | |
3403 | else | |
3404 | err = sock->ops->getsockopt(sock, level, optname, uoptval, | |
3405 | uoptlen); | |
3406 | set_fs(oldfs); | |
3407 | return err; | |
3408 | } | |
3409 | EXPORT_SYMBOL(kernel_getsockopt); | |
3410 | ||
3411 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
3412 | char *optval, unsigned int optlen) | |
3413 | { | |
3414 | mm_segment_t oldfs = get_fs(); | |
3415 | char __user *uoptval; | |
3416 | int err; | |
3417 | ||
3418 | uoptval = (char __user __force *) optval; | |
3419 | ||
3420 | set_fs(KERNEL_DS); | |
3421 | if (level == SOL_SOCKET) | |
3422 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); | |
3423 | else | |
3424 | err = sock->ops->setsockopt(sock, level, optname, uoptval, | |
3425 | optlen); | |
3426 | set_fs(oldfs); | |
3427 | return err; | |
3428 | } | |
3429 | EXPORT_SYMBOL(kernel_setsockopt); | |
3430 | ||
3431 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3432 | size_t size, int flags) | |
3433 | { | |
3434 | if (sock->ops->sendpage) | |
3435 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3436 | ||
3437 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3438 | } | |
3439 | EXPORT_SYMBOL(kernel_sendpage); | |
3440 | ||
3441 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3442 | { | |
3443 | mm_segment_t oldfs = get_fs(); | |
3444 | int err; | |
3445 | ||
3446 | set_fs(KERNEL_DS); | |
3447 | err = sock->ops->ioctl(sock, cmd, arg); | |
3448 | set_fs(oldfs); | |
3449 | ||
3450 | return err; | |
3451 | } | |
3452 | EXPORT_SYMBOL(kernel_sock_ioctl); | |
3453 | ||
3454 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) | |
3455 | { | |
3456 | return sock->ops->shutdown(sock, how); | |
3457 | } | |
3458 | EXPORT_SYMBOL(kernel_sock_shutdown); |