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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 | |
92 | #include <asm/uaccess.h> |
93 | #include <asm/unistd.h> |
94 | |
95 | #include <net/compat.h> |
96 | #include <net/wext.h> |
97 | |
98 | #include <net/sock.h> |
99 | #include <linux/netfilter.h> |
100 | |
101 | #include <linux/if_tun.h> |
102 | #include <linux/ipv6_route.h> |
103 | #include <linux/route.h> |
104 | #include <linux/sockios.h> |
105 | #include <linux/atalk.h> |
106 | |
107 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
108 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
109 | unsigned long nr_segs, loff_t pos); |
110 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
111 | unsigned long nr_segs, loff_t pos); |
112 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
113 | |
114 | static int sock_close(struct inode *inode, struct file *file); |
115 | static unsigned int sock_poll(struct file *file, |
116 | struct poll_table_struct *wait); |
117 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
118 | #ifdef CONFIG_COMPAT |
119 | static long compat_sock_ioctl(struct file *file, |
120 | unsigned int cmd, unsigned long arg); |
121 | #endif |
122 | static int sock_fasync(int fd, struct file *filp, int on); |
123 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
124 | int offset, size_t size, loff_t *ppos, int more); |
125 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
126 | struct pipe_inode_info *pipe, size_t len, |
127 | unsigned int flags); |
128 | |
129 | /* |
130 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear |
131 | * in the operation structures but are done directly via the socketcall() multiplexor. |
132 | */ |
133 | |
134 | static const struct file_operations socket_file_ops = { |
135 | .owner = THIS_MODULE, |
136 | .llseek = no_llseek, |
137 | .aio_read = sock_aio_read, |
138 | .aio_write = sock_aio_write, |
139 | .poll = sock_poll, |
140 | .unlocked_ioctl = sock_ioctl, |
141 | #ifdef CONFIG_COMPAT |
142 | .compat_ioctl = compat_sock_ioctl, |
143 | #endif |
144 | .mmap = sock_mmap, |
145 | .open = sock_no_open, /* special open code to disallow open via /proc */ |
146 | .release = sock_close, |
147 | .fasync = sock_fasync, |
148 | .sendpage = sock_sendpage, |
149 | .splice_write = generic_splice_sendpage, |
150 | .splice_read = sock_splice_read, |
151 | }; |
152 | |
153 | /* |
154 | * The protocol list. Each protocol is registered in here. |
155 | */ |
156 | |
157 | static DEFINE_SPINLOCK(net_family_lock); |
158 | static const struct net_proto_family *net_families[NPROTO] __read_mostly; |
159 | |
160 | /* |
161 | * Statistics counters of the socket lists |
162 | */ |
163 | |
164 | static DEFINE_PER_CPU(int, sockets_in_use) = 0; |
165 | |
166 | /* |
167 | * Support routines. |
168 | * Move socket addresses back and forth across the kernel/user |
169 | * divide and look after the messy bits. |
170 | */ |
171 | |
172 | #define MAX_SOCK_ADDR 128 /* 108 for Unix domain - |
173 | 16 for IP, 16 for IPX, |
174 | 24 for IPv6, |
175 | about 80 for AX.25 |
176 | must be at least one bigger than |
177 | the AF_UNIX size (see net/unix/af_unix.c |
178 | :unix_mkname()). |
179 | */ |
180 | |
181 | /** |
182 | * move_addr_to_kernel - copy a socket address into kernel space |
183 | * @uaddr: Address in user space |
184 | * @kaddr: Address in kernel space |
185 | * @ulen: Length in user space |
186 | * |
187 | * The address is copied into kernel space. If the provided address is |
188 | * too long an error code of -EINVAL is returned. If the copy gives |
189 | * invalid addresses -EFAULT is returned. On a success 0 is returned. |
190 | */ |
191 | |
192 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) |
193 | { |
194 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
195 | return -EINVAL; |
196 | if (ulen == 0) |
197 | return 0; |
198 | if (copy_from_user(kaddr, uaddr, ulen)) |
199 | return -EFAULT; |
200 | return audit_sockaddr(ulen, kaddr); |
201 | } |
202 | |
203 | /** |
204 | * move_addr_to_user - copy an address to user space |
205 | * @kaddr: kernel space address |
206 | * @klen: length of address in kernel |
207 | * @uaddr: user space address |
208 | * @ulen: pointer to user length field |
209 | * |
210 | * The value pointed to by ulen on entry is the buffer length available. |
211 | * This is overwritten with the buffer space used. -EINVAL is returned |
212 | * if an overlong buffer is specified or a negative buffer size. -EFAULT |
213 | * is returned if either the buffer or the length field are not |
214 | * accessible. |
215 | * After copying the data up to the limit the user specifies, the true |
216 | * length of the data is written over the length limit the user |
217 | * specified. Zero is returned for a success. |
218 | */ |
219 | |
220 | int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, |
221 | int __user *ulen) |
222 | { |
223 | int err; |
224 | int len; |
225 | |
226 | err = get_user(len, ulen); |
227 | if (err) |
228 | return err; |
229 | if (len > klen) |
230 | len = klen; |
231 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
232 | return -EINVAL; |
233 | if (len) { |
234 | if (audit_sockaddr(klen, kaddr)) |
235 | return -ENOMEM; |
236 | if (copy_to_user(uaddr, kaddr, len)) |
237 | return -EFAULT; |
238 | } |
239 | /* |
240 | * "fromlen shall refer to the value before truncation.." |
241 | * 1003.1g |
242 | */ |
243 | return __put_user(klen, ulen); |
244 | } |
245 | |
246 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
247 | |
248 | static struct inode *sock_alloc_inode(struct super_block *sb) |
249 | { |
250 | struct socket_alloc *ei; |
251 | |
252 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
253 | if (!ei) |
254 | return NULL; |
255 | init_waitqueue_head(&ei->socket.wait); |
256 | |
257 | ei->socket.fasync_list = NULL; |
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 | kmem_cache_free(sock_inode_cachep, |
270 | container_of(inode, struct socket_alloc, vfs_inode)); |
271 | } |
272 | |
273 | static void init_once(void *foo) |
274 | { |
275 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
276 | |
277 | inode_init_once(&ei->vfs_inode); |
278 | } |
279 | |
280 | static int init_inodecache(void) |
281 | { |
282 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
283 | sizeof(struct socket_alloc), |
284 | 0, |
285 | (SLAB_HWCACHE_ALIGN | |
286 | SLAB_RECLAIM_ACCOUNT | |
287 | SLAB_MEM_SPREAD), |
288 | init_once); |
289 | if (sock_inode_cachep == NULL) |
290 | return -ENOMEM; |
291 | return 0; |
292 | } |
293 | |
294 | static const struct super_operations sockfs_ops = { |
295 | .alloc_inode = sock_alloc_inode, |
296 | .destroy_inode =sock_destroy_inode, |
297 | .statfs = simple_statfs, |
298 | }; |
299 | |
300 | static int sockfs_get_sb(struct file_system_type *fs_type, |
301 | int flags, const char *dev_name, void *data, |
302 | struct vfsmount *mnt) |
303 | { |
304 | return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC, |
305 | mnt); |
306 | } |
307 | |
308 | static struct vfsmount *sock_mnt __read_mostly; |
309 | |
310 | static struct file_system_type sock_fs_type = { |
311 | .name = "sockfs", |
312 | .get_sb = sockfs_get_sb, |
313 | .kill_sb = kill_anon_super, |
314 | }; |
315 | |
316 | /* |
317 | * sockfs_dname() is called from d_path(). |
318 | */ |
319 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) |
320 | { |
321 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", |
322 | dentry->d_inode->i_ino); |
323 | } |
324 | |
325 | static const struct dentry_operations sockfs_dentry_operations = { |
326 | .d_dname = sockfs_dname, |
327 | }; |
328 | |
329 | /* |
330 | * Obtains the first available file descriptor and sets it up for use. |
331 | * |
332 | * These functions create file structures and maps them to fd space |
333 | * of the current process. On success it returns file descriptor |
334 | * and file struct implicitly stored in sock->file. |
335 | * Note that another thread may close file descriptor before we return |
336 | * from this function. We use the fact that now we do not refer |
337 | * to socket after mapping. If one day we will need it, this |
338 | * function will increment ref. count on file by 1. |
339 | * |
340 | * In any case returned fd MAY BE not valid! |
341 | * This race condition is unavoidable |
342 | * with shared fd spaces, we cannot solve it inside kernel, |
343 | * but we take care of internal coherence yet. |
344 | */ |
345 | |
346 | static int sock_alloc_file(struct socket *sock, struct file **f, int flags) |
347 | { |
348 | struct qstr name = { .name = "" }; |
349 | struct path path; |
350 | struct file *file; |
351 | int fd; |
352 | |
353 | fd = get_unused_fd_flags(flags); |
354 | if (unlikely(fd < 0)) |
355 | return fd; |
356 | |
357 | path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); |
358 | if (unlikely(!path.dentry)) { |
359 | put_unused_fd(fd); |
360 | return -ENOMEM; |
361 | } |
362 | path.mnt = mntget(sock_mnt); |
363 | |
364 | path.dentry->d_op = &sockfs_dentry_operations; |
365 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
366 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
367 | |
368 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
369 | &socket_file_ops); |
370 | if (unlikely(!file)) { |
371 | /* drop dentry, keep inode */ |
372 | atomic_inc(&path.dentry->d_inode->i_count); |
373 | path_put(&path); |
374 | put_unused_fd(fd); |
375 | return -ENFILE; |
376 | } |
377 | |
378 | sock->file = file; |
379 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
380 | file->f_pos = 0; |
381 | file->private_data = sock; |
382 | |
383 | *f = file; |
384 | return fd; |
385 | } |
386 | |
387 | int sock_map_fd(struct socket *sock, int flags) |
388 | { |
389 | struct file *newfile; |
390 | int fd = sock_alloc_file(sock, &newfile, flags); |
391 | |
392 | if (likely(fd >= 0)) |
393 | fd_install(fd, newfile); |
394 | |
395 | return fd; |
396 | } |
397 | |
398 | static struct socket *sock_from_file(struct file *file, int *err) |
399 | { |
400 | if (file->f_op == &socket_file_ops) |
401 | return file->private_data; /* set in sock_map_fd */ |
402 | |
403 | *err = -ENOTSOCK; |
404 | return NULL; |
405 | } |
406 | |
407 | /** |
408 | * sockfd_lookup - Go from a file number to its socket slot |
409 | * @fd: file handle |
410 | * @err: pointer to an error code return |
411 | * |
412 | * The file handle passed in is locked and the socket it is bound |
413 | * too is returned. If an error occurs the err pointer is overwritten |
414 | * with a negative errno code and NULL is returned. The function checks |
415 | * for both invalid handles and passing a handle which is not a socket. |
416 | * |
417 | * On a success the socket object pointer is returned. |
418 | */ |
419 | |
420 | struct socket *sockfd_lookup(int fd, int *err) |
421 | { |
422 | struct file *file; |
423 | struct socket *sock; |
424 | |
425 | file = fget(fd); |
426 | if (!file) { |
427 | *err = -EBADF; |
428 | return NULL; |
429 | } |
430 | |
431 | sock = sock_from_file(file, err); |
432 | if (!sock) |
433 | fput(file); |
434 | return sock; |
435 | } |
436 | |
437 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
438 | { |
439 | struct file *file; |
440 | struct socket *sock; |
441 | |
442 | *err = -EBADF; |
443 | file = fget_light(fd, fput_needed); |
444 | if (file) { |
445 | sock = sock_from_file(file, err); |
446 | if (sock) |
447 | return sock; |
448 | fput_light(file, *fput_needed); |
449 | } |
450 | return NULL; |
451 | } |
452 | |
453 | /** |
454 | * sock_alloc - allocate a socket |
455 | * |
456 | * Allocate a new inode and socket object. The two are bound together |
457 | * and initialised. The socket is then returned. If we are out of inodes |
458 | * NULL is returned. |
459 | */ |
460 | |
461 | static struct socket *sock_alloc(void) |
462 | { |
463 | struct inode *inode; |
464 | struct socket *sock; |
465 | |
466 | inode = new_inode(sock_mnt->mnt_sb); |
467 | if (!inode) |
468 | return NULL; |
469 | |
470 | sock = SOCKET_I(inode); |
471 | |
472 | kmemcheck_annotate_bitfield(sock, type); |
473 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
474 | inode->i_uid = current_fsuid(); |
475 | inode->i_gid = current_fsgid(); |
476 | |
477 | percpu_add(sockets_in_use, 1); |
478 | return sock; |
479 | } |
480 | |
481 | /* |
482 | * In theory you can't get an open on this inode, but /proc provides |
483 | * a back door. Remember to keep it shut otherwise you'll let the |
484 | * creepy crawlies in. |
485 | */ |
486 | |
487 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
488 | { |
489 | return -ENXIO; |
490 | } |
491 | |
492 | const struct file_operations bad_sock_fops = { |
493 | .owner = THIS_MODULE, |
494 | .open = sock_no_open, |
495 | }; |
496 | |
497 | /** |
498 | * sock_release - close a socket |
499 | * @sock: socket to close |
500 | * |
501 | * The socket is released from the protocol stack if it has a release |
502 | * callback, and the inode is then released if the socket is bound to |
503 | * an inode not a file. |
504 | */ |
505 | |
506 | void sock_release(struct socket *sock) |
507 | { |
508 | if (sock->ops) { |
509 | struct module *owner = sock->ops->owner; |
510 | |
511 | sock->ops->release(sock); |
512 | sock->ops = NULL; |
513 | module_put(owner); |
514 | } |
515 | |
516 | if (sock->fasync_list) |
517 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
518 | |
519 | percpu_sub(sockets_in_use, 1); |
520 | if (!sock->file) { |
521 | iput(SOCK_INODE(sock)); |
522 | return; |
523 | } |
524 | sock->file = NULL; |
525 | } |
526 | |
527 | int sock_tx_timestamp(struct msghdr *msg, struct sock *sk, |
528 | union skb_shared_tx *shtx) |
529 | { |
530 | shtx->flags = 0; |
531 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
532 | shtx->hardware = 1; |
533 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
534 | shtx->software = 1; |
535 | return 0; |
536 | } |
537 | EXPORT_SYMBOL(sock_tx_timestamp); |
538 | |
539 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
540 | struct msghdr *msg, size_t size) |
541 | { |
542 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
543 | int err; |
544 | |
545 | si->sock = sock; |
546 | si->scm = NULL; |
547 | si->msg = msg; |
548 | si->size = size; |
549 | |
550 | err = security_socket_sendmsg(sock, msg, size); |
551 | if (err) |
552 | return err; |
553 | |
554 | return sock->ops->sendmsg(iocb, sock, msg, size); |
555 | } |
556 | |
557 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
558 | { |
559 | struct kiocb iocb; |
560 | struct sock_iocb siocb; |
561 | int ret; |
562 | |
563 | init_sync_kiocb(&iocb, NULL); |
564 | iocb.private = &siocb; |
565 | ret = __sock_sendmsg(&iocb, sock, msg, size); |
566 | if (-EIOCBQUEUED == ret) |
567 | ret = wait_on_sync_kiocb(&iocb); |
568 | return ret; |
569 | } |
570 | |
571 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
572 | struct kvec *vec, size_t num, size_t size) |
573 | { |
574 | mm_segment_t oldfs = get_fs(); |
575 | int result; |
576 | |
577 | set_fs(KERNEL_DS); |
578 | /* |
579 | * the following is safe, since for compiler definitions of kvec and |
580 | * iovec are identical, yielding the same in-core layout and alignment |
581 | */ |
582 | msg->msg_iov = (struct iovec *)vec; |
583 | msg->msg_iovlen = num; |
584 | result = sock_sendmsg(sock, msg, size); |
585 | set_fs(oldfs); |
586 | return result; |
587 | } |
588 | |
589 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
590 | { |
591 | if (kt.tv64) { |
592 | *ts = ktime_to_timespec(kt); |
593 | return 1; |
594 | } else { |
595 | return 0; |
596 | } |
597 | } |
598 | |
599 | /* |
600 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
601 | */ |
602 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
603 | struct sk_buff *skb) |
604 | { |
605 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
606 | struct timespec ts[3]; |
607 | int empty = 1; |
608 | struct skb_shared_hwtstamps *shhwtstamps = |
609 | skb_hwtstamps(skb); |
610 | |
611 | /* Race occurred between timestamp enabling and packet |
612 | receiving. Fill in the current time for now. */ |
613 | if (need_software_tstamp && skb->tstamp.tv64 == 0) |
614 | __net_timestamp(skb); |
615 | |
616 | if (need_software_tstamp) { |
617 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
618 | struct timeval tv; |
619 | skb_get_timestamp(skb, &tv); |
620 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, |
621 | sizeof(tv), &tv); |
622 | } else { |
623 | struct timespec ts; |
624 | skb_get_timestampns(skb, &ts); |
625 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
626 | sizeof(ts), &ts); |
627 | } |
628 | } |
629 | |
630 | |
631 | memset(ts, 0, sizeof(ts)); |
632 | if (skb->tstamp.tv64 && |
633 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { |
634 | skb_get_timestampns(skb, ts + 0); |
635 | empty = 0; |
636 | } |
637 | if (shhwtstamps) { |
638 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && |
639 | ktime2ts(shhwtstamps->syststamp, ts + 1)) |
640 | empty = 0; |
641 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && |
642 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) |
643 | empty = 0; |
644 | } |
645 | if (!empty) |
646 | put_cmsg(msg, SOL_SOCKET, |
647 | SCM_TIMESTAMPING, sizeof(ts), &ts); |
648 | } |
649 | |
650 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
651 | |
652 | inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) |
653 | { |
654 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) |
655 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
656 | sizeof(__u32), &skb->dropcount); |
657 | } |
658 | |
659 | void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
660 | struct sk_buff *skb) |
661 | { |
662 | sock_recv_timestamp(msg, sk, skb); |
663 | sock_recv_drops(msg, sk, skb); |
664 | } |
665 | EXPORT_SYMBOL_GPL(sock_recv_ts_and_drops); |
666 | |
667 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
668 | struct msghdr *msg, size_t size, int flags) |
669 | { |
670 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
671 | |
672 | si->sock = sock; |
673 | si->scm = NULL; |
674 | si->msg = msg; |
675 | si->size = size; |
676 | si->flags = flags; |
677 | |
678 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
679 | } |
680 | |
681 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
682 | struct msghdr *msg, size_t size, int flags) |
683 | { |
684 | int err = security_socket_recvmsg(sock, msg, size, flags); |
685 | |
686 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); |
687 | } |
688 | |
689 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
690 | size_t size, int flags) |
691 | { |
692 | struct kiocb iocb; |
693 | struct sock_iocb siocb; |
694 | int ret; |
695 | |
696 | init_sync_kiocb(&iocb, NULL); |
697 | iocb.private = &siocb; |
698 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); |
699 | if (-EIOCBQUEUED == ret) |
700 | ret = wait_on_sync_kiocb(&iocb); |
701 | return ret; |
702 | } |
703 | |
704 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
705 | size_t size, int flags) |
706 | { |
707 | struct kiocb iocb; |
708 | struct sock_iocb siocb; |
709 | int ret; |
710 | |
711 | init_sync_kiocb(&iocb, NULL); |
712 | iocb.private = &siocb; |
713 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); |
714 | if (-EIOCBQUEUED == ret) |
715 | ret = wait_on_sync_kiocb(&iocb); |
716 | return ret; |
717 | } |
718 | |
719 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
720 | struct kvec *vec, size_t num, size_t size, int flags) |
721 | { |
722 | mm_segment_t oldfs = get_fs(); |
723 | int result; |
724 | |
725 | set_fs(KERNEL_DS); |
726 | /* |
727 | * the following is safe, since for compiler definitions of kvec and |
728 | * iovec are identical, yielding the same in-core layout and alignment |
729 | */ |
730 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
731 | result = sock_recvmsg(sock, msg, size, flags); |
732 | set_fs(oldfs); |
733 | return result; |
734 | } |
735 | |
736 | static void sock_aio_dtor(struct kiocb *iocb) |
737 | { |
738 | kfree(iocb->private); |
739 | } |
740 | |
741 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
742 | int offset, size_t size, loff_t *ppos, int more) |
743 | { |
744 | struct socket *sock; |
745 | int flags; |
746 | |
747 | sock = file->private_data; |
748 | |
749 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; |
750 | if (more) |
751 | flags |= MSG_MORE; |
752 | |
753 | return kernel_sendpage(sock, page, offset, size, flags); |
754 | } |
755 | |
756 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
757 | struct pipe_inode_info *pipe, size_t len, |
758 | unsigned int flags) |
759 | { |
760 | struct socket *sock = file->private_data; |
761 | |
762 | if (unlikely(!sock->ops->splice_read)) |
763 | return -EINVAL; |
764 | |
765 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
766 | } |
767 | |
768 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
769 | struct sock_iocb *siocb) |
770 | { |
771 | if (!is_sync_kiocb(iocb)) { |
772 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); |
773 | if (!siocb) |
774 | return NULL; |
775 | iocb->ki_dtor = sock_aio_dtor; |
776 | } |
777 | |
778 | siocb->kiocb = iocb; |
779 | iocb->private = siocb; |
780 | return siocb; |
781 | } |
782 | |
783 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
784 | struct file *file, const struct iovec *iov, |
785 | unsigned long nr_segs) |
786 | { |
787 | struct socket *sock = file->private_data; |
788 | size_t size = 0; |
789 | int i; |
790 | |
791 | for (i = 0; i < nr_segs; i++) |
792 | size += iov[i].iov_len; |
793 | |
794 | msg->msg_name = NULL; |
795 | msg->msg_namelen = 0; |
796 | msg->msg_control = NULL; |
797 | msg->msg_controllen = 0; |
798 | msg->msg_iov = (struct iovec *)iov; |
799 | msg->msg_iovlen = nr_segs; |
800 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
801 | |
802 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); |
803 | } |
804 | |
805 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
806 | unsigned long nr_segs, loff_t pos) |
807 | { |
808 | struct sock_iocb siocb, *x; |
809 | |
810 | if (pos != 0) |
811 | return -ESPIPE; |
812 | |
813 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ |
814 | return 0; |
815 | |
816 | |
817 | x = alloc_sock_iocb(iocb, &siocb); |
818 | if (!x) |
819 | return -ENOMEM; |
820 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
821 | } |
822 | |
823 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
824 | struct file *file, const struct iovec *iov, |
825 | unsigned long nr_segs) |
826 | { |
827 | struct socket *sock = file->private_data; |
828 | size_t size = 0; |
829 | int i; |
830 | |
831 | for (i = 0; i < nr_segs; i++) |
832 | size += iov[i].iov_len; |
833 | |
834 | msg->msg_name = NULL; |
835 | msg->msg_namelen = 0; |
836 | msg->msg_control = NULL; |
837 | msg->msg_controllen = 0; |
838 | msg->msg_iov = (struct iovec *)iov; |
839 | msg->msg_iovlen = nr_segs; |
840 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
841 | if (sock->type == SOCK_SEQPACKET) |
842 | msg->msg_flags |= MSG_EOR; |
843 | |
844 | return __sock_sendmsg(iocb, sock, msg, size); |
845 | } |
846 | |
847 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
848 | unsigned long nr_segs, loff_t pos) |
849 | { |
850 | struct sock_iocb siocb, *x; |
851 | |
852 | if (pos != 0) |
853 | return -ESPIPE; |
854 | |
855 | x = alloc_sock_iocb(iocb, &siocb); |
856 | if (!x) |
857 | return -ENOMEM; |
858 | |
859 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
860 | } |
861 | |
862 | /* |
863 | * Atomic setting of ioctl hooks to avoid race |
864 | * with module unload. |
865 | */ |
866 | |
867 | static DEFINE_MUTEX(br_ioctl_mutex); |
868 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL; |
869 | |
870 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
871 | { |
872 | mutex_lock(&br_ioctl_mutex); |
873 | br_ioctl_hook = hook; |
874 | mutex_unlock(&br_ioctl_mutex); |
875 | } |
876 | |
877 | EXPORT_SYMBOL(brioctl_set); |
878 | |
879 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
880 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
881 | |
882 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
883 | { |
884 | mutex_lock(&vlan_ioctl_mutex); |
885 | vlan_ioctl_hook = hook; |
886 | mutex_unlock(&vlan_ioctl_mutex); |
887 | } |
888 | |
889 | EXPORT_SYMBOL(vlan_ioctl_set); |
890 | |
891 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
892 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
893 | |
894 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
895 | { |
896 | mutex_lock(&dlci_ioctl_mutex); |
897 | dlci_ioctl_hook = hook; |
898 | mutex_unlock(&dlci_ioctl_mutex); |
899 | } |
900 | |
901 | EXPORT_SYMBOL(dlci_ioctl_set); |
902 | |
903 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
904 | unsigned int cmd, unsigned long arg) |
905 | { |
906 | int err; |
907 | void __user *argp = (void __user *)arg; |
908 | |
909 | err = sock->ops->ioctl(sock, cmd, arg); |
910 | |
911 | /* |
912 | * If this ioctl is unknown try to hand it down |
913 | * to the NIC driver. |
914 | */ |
915 | if (err == -ENOIOCTLCMD) |
916 | err = dev_ioctl(net, cmd, argp); |
917 | |
918 | return err; |
919 | } |
920 | |
921 | /* |
922 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
923 | * what to do with it - that's up to the protocol still. |
924 | */ |
925 | |
926 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
927 | { |
928 | struct socket *sock; |
929 | struct sock *sk; |
930 | void __user *argp = (void __user *)arg; |
931 | int pid, err; |
932 | struct net *net; |
933 | |
934 | sock = file->private_data; |
935 | sk = sock->sk; |
936 | net = sock_net(sk); |
937 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
938 | err = dev_ioctl(net, cmd, argp); |
939 | } else |
940 | #ifdef CONFIG_WEXT_CORE |
941 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
942 | err = dev_ioctl(net, cmd, argp); |
943 | } else |
944 | #endif |
945 | switch (cmd) { |
946 | case FIOSETOWN: |
947 | case SIOCSPGRP: |
948 | err = -EFAULT; |
949 | if (get_user(pid, (int __user *)argp)) |
950 | break; |
951 | err = f_setown(sock->file, pid, 1); |
952 | break; |
953 | case FIOGETOWN: |
954 | case SIOCGPGRP: |
955 | err = put_user(f_getown(sock->file), |
956 | (int __user *)argp); |
957 | break; |
958 | case SIOCGIFBR: |
959 | case SIOCSIFBR: |
960 | case SIOCBRADDBR: |
961 | case SIOCBRDELBR: |
962 | err = -ENOPKG; |
963 | if (!br_ioctl_hook) |
964 | request_module("bridge"); |
965 | |
966 | mutex_lock(&br_ioctl_mutex); |
967 | if (br_ioctl_hook) |
968 | err = br_ioctl_hook(net, cmd, argp); |
969 | mutex_unlock(&br_ioctl_mutex); |
970 | break; |
971 | case SIOCGIFVLAN: |
972 | case SIOCSIFVLAN: |
973 | err = -ENOPKG; |
974 | if (!vlan_ioctl_hook) |
975 | request_module("8021q"); |
976 | |
977 | mutex_lock(&vlan_ioctl_mutex); |
978 | if (vlan_ioctl_hook) |
979 | err = vlan_ioctl_hook(net, argp); |
980 | mutex_unlock(&vlan_ioctl_mutex); |
981 | break; |
982 | case SIOCADDDLCI: |
983 | case SIOCDELDLCI: |
984 | err = -ENOPKG; |
985 | if (!dlci_ioctl_hook) |
986 | request_module("dlci"); |
987 | |
988 | mutex_lock(&dlci_ioctl_mutex); |
989 | if (dlci_ioctl_hook) |
990 | err = dlci_ioctl_hook(cmd, argp); |
991 | mutex_unlock(&dlci_ioctl_mutex); |
992 | break; |
993 | default: |
994 | err = sock_do_ioctl(net, sock, cmd, arg); |
995 | break; |
996 | } |
997 | return err; |
998 | } |
999 | |
1000 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
1001 | { |
1002 | int err; |
1003 | struct socket *sock = NULL; |
1004 | |
1005 | err = security_socket_create(family, type, protocol, 1); |
1006 | if (err) |
1007 | goto out; |
1008 | |
1009 | sock = sock_alloc(); |
1010 | if (!sock) { |
1011 | err = -ENOMEM; |
1012 | goto out; |
1013 | } |
1014 | |
1015 | sock->type = type; |
1016 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1017 | if (err) |
1018 | goto out_release; |
1019 | |
1020 | out: |
1021 | *res = sock; |
1022 | return err; |
1023 | out_release: |
1024 | sock_release(sock); |
1025 | sock = NULL; |
1026 | goto out; |
1027 | } |
1028 | |
1029 | /* No kernel lock held - perfect */ |
1030 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1031 | { |
1032 | struct socket *sock; |
1033 | |
1034 | /* |
1035 | * We can't return errors to poll, so it's either yes or no. |
1036 | */ |
1037 | sock = file->private_data; |
1038 | return sock->ops->poll(file, sock, wait); |
1039 | } |
1040 | |
1041 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1042 | { |
1043 | struct socket *sock = file->private_data; |
1044 | |
1045 | return sock->ops->mmap(file, sock, vma); |
1046 | } |
1047 | |
1048 | static int sock_close(struct inode *inode, struct file *filp) |
1049 | { |
1050 | /* |
1051 | * It was possible the inode is NULL we were |
1052 | * closing an unfinished socket. |
1053 | */ |
1054 | |
1055 | if (!inode) { |
1056 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1057 | return 0; |
1058 | } |
1059 | sock_release(SOCKET_I(inode)); |
1060 | return 0; |
1061 | } |
1062 | |
1063 | /* |
1064 | * Update the socket async list |
1065 | * |
1066 | * Fasync_list locking strategy. |
1067 | * |
1068 | * 1. fasync_list is modified only under process context socket lock |
1069 | * i.e. under semaphore. |
1070 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
1071 | * or under socket lock. |
1072 | * 3. fasync_list can be used from softirq context, so that |
1073 | * modification under socket lock have to be enhanced with |
1074 | * write_lock_bh(&sk->sk_callback_lock). |
1075 | * --ANK (990710) |
1076 | */ |
1077 | |
1078 | static int sock_fasync(int fd, struct file *filp, int on) |
1079 | { |
1080 | struct fasync_struct *fa, *fna = NULL, **prev; |
1081 | struct socket *sock; |
1082 | struct sock *sk; |
1083 | |
1084 | if (on) { |
1085 | fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL); |
1086 | if (fna == NULL) |
1087 | return -ENOMEM; |
1088 | } |
1089 | |
1090 | sock = filp->private_data; |
1091 | |
1092 | sk = sock->sk; |
1093 | if (sk == NULL) { |
1094 | kfree(fna); |
1095 | return -EINVAL; |
1096 | } |
1097 | |
1098 | lock_sock(sk); |
1099 | |
1100 | spin_lock(&filp->f_lock); |
1101 | if (on) |
1102 | filp->f_flags |= FASYNC; |
1103 | else |
1104 | filp->f_flags &= ~FASYNC; |
1105 | spin_unlock(&filp->f_lock); |
1106 | |
1107 | prev = &(sock->fasync_list); |
1108 | |
1109 | for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev) |
1110 | if (fa->fa_file == filp) |
1111 | break; |
1112 | |
1113 | if (on) { |
1114 | if (fa != NULL) { |
1115 | write_lock_bh(&sk->sk_callback_lock); |
1116 | fa->fa_fd = fd; |
1117 | write_unlock_bh(&sk->sk_callback_lock); |
1118 | |
1119 | kfree(fna); |
1120 | goto out; |
1121 | } |
1122 | fna->fa_file = filp; |
1123 | fna->fa_fd = fd; |
1124 | fna->magic = FASYNC_MAGIC; |
1125 | fna->fa_next = sock->fasync_list; |
1126 | write_lock_bh(&sk->sk_callback_lock); |
1127 | sock->fasync_list = fna; |
1128 | sock_set_flag(sk, SOCK_FASYNC); |
1129 | write_unlock_bh(&sk->sk_callback_lock); |
1130 | } else { |
1131 | if (fa != NULL) { |
1132 | write_lock_bh(&sk->sk_callback_lock); |
1133 | *prev = fa->fa_next; |
1134 | if (!sock->fasync_list) |
1135 | sock_reset_flag(sk, SOCK_FASYNC); |
1136 | write_unlock_bh(&sk->sk_callback_lock); |
1137 | kfree(fa); |
1138 | } |
1139 | } |
1140 | |
1141 | out: |
1142 | release_sock(sock->sk); |
1143 | return 0; |
1144 | } |
1145 | |
1146 | /* This function may be called only under socket lock or callback_lock */ |
1147 | |
1148 | int sock_wake_async(struct socket *sock, int how, int band) |
1149 | { |
1150 | if (!sock || !sock->fasync_list) |
1151 | return -1; |
1152 | switch (how) { |
1153 | case SOCK_WAKE_WAITD: |
1154 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1155 | break; |
1156 | goto call_kill; |
1157 | case SOCK_WAKE_SPACE: |
1158 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1159 | break; |
1160 | /* fall through */ |
1161 | case SOCK_WAKE_IO: |
1162 | call_kill: |
1163 | __kill_fasync(sock->fasync_list, SIGIO, band); |
1164 | break; |
1165 | case SOCK_WAKE_URG: |
1166 | __kill_fasync(sock->fasync_list, SIGURG, band); |
1167 | } |
1168 | return 0; |
1169 | } |
1170 | |
1171 | static int __sock_create(struct net *net, int family, int type, int protocol, |
1172 | struct socket **res, int kern) |
1173 | { |
1174 | int err; |
1175 | struct socket *sock; |
1176 | const struct net_proto_family *pf; |
1177 | |
1178 | /* |
1179 | * Check protocol is in range |
1180 | */ |
1181 | if (family < 0 || family >= NPROTO) |
1182 | return -EAFNOSUPPORT; |
1183 | if (type < 0 || type >= SOCK_MAX) |
1184 | return -EINVAL; |
1185 | |
1186 | /* Compatibility. |
1187 | |
1188 | This uglymoron is moved from INET layer to here to avoid |
1189 | deadlock in module load. |
1190 | */ |
1191 | if (family == PF_INET && type == SOCK_PACKET) { |
1192 | static int warned; |
1193 | if (!warned) { |
1194 | warned = 1; |
1195 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1196 | current->comm); |
1197 | } |
1198 | family = PF_PACKET; |
1199 | } |
1200 | |
1201 | err = security_socket_create(family, type, protocol, kern); |
1202 | if (err) |
1203 | return err; |
1204 | |
1205 | /* |
1206 | * Allocate the socket and allow the family to set things up. if |
1207 | * the protocol is 0, the family is instructed to select an appropriate |
1208 | * default. |
1209 | */ |
1210 | sock = sock_alloc(); |
1211 | if (!sock) { |
1212 | if (net_ratelimit()) |
1213 | printk(KERN_WARNING "socket: no more sockets\n"); |
1214 | return -ENFILE; /* Not exactly a match, but its the |
1215 | closest posix thing */ |
1216 | } |
1217 | |
1218 | sock->type = type; |
1219 | |
1220 | #ifdef CONFIG_MODULES |
1221 | /* Attempt to load a protocol module if the find failed. |
1222 | * |
1223 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user |
1224 | * requested real, full-featured networking support upon configuration. |
1225 | * Otherwise module support will break! |
1226 | */ |
1227 | if (net_families[family] == NULL) |
1228 | request_module("net-pf-%d", family); |
1229 | #endif |
1230 | |
1231 | rcu_read_lock(); |
1232 | pf = rcu_dereference(net_families[family]); |
1233 | err = -EAFNOSUPPORT; |
1234 | if (!pf) |
1235 | goto out_release; |
1236 | |
1237 | /* |
1238 | * We will call the ->create function, that possibly is in a loadable |
1239 | * module, so we have to bump that loadable module refcnt first. |
1240 | */ |
1241 | if (!try_module_get(pf->owner)) |
1242 | goto out_release; |
1243 | |
1244 | /* Now protected by module ref count */ |
1245 | rcu_read_unlock(); |
1246 | |
1247 | err = pf->create(net, sock, protocol, kern); |
1248 | if (err < 0) |
1249 | goto out_module_put; |
1250 | |
1251 | /* |
1252 | * Now to bump the refcnt of the [loadable] module that owns this |
1253 | * socket at sock_release time we decrement its refcnt. |
1254 | */ |
1255 | if (!try_module_get(sock->ops->owner)) |
1256 | goto out_module_busy; |
1257 | |
1258 | /* |
1259 | * Now that we're done with the ->create function, the [loadable] |
1260 | * module can have its refcnt decremented |
1261 | */ |
1262 | module_put(pf->owner); |
1263 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1264 | if (err) |
1265 | goto out_sock_release; |
1266 | *res = sock; |
1267 | |
1268 | return 0; |
1269 | |
1270 | out_module_busy: |
1271 | err = -EAFNOSUPPORT; |
1272 | out_module_put: |
1273 | sock->ops = NULL; |
1274 | module_put(pf->owner); |
1275 | out_sock_release: |
1276 | sock_release(sock); |
1277 | return err; |
1278 | |
1279 | out_release: |
1280 | rcu_read_unlock(); |
1281 | goto out_sock_release; |
1282 | } |
1283 | |
1284 | int sock_create(int family, int type, int protocol, struct socket **res) |
1285 | { |
1286 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1287 | } |
1288 | |
1289 | int sock_create_kern(int family, int type, int protocol, struct socket **res) |
1290 | { |
1291 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1292 | } |
1293 | |
1294 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1295 | { |
1296 | int retval; |
1297 | struct socket *sock; |
1298 | int flags; |
1299 | |
1300 | /* Check the SOCK_* constants for consistency. */ |
1301 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
1302 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
1303 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
1304 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
1305 | |
1306 | flags = type & ~SOCK_TYPE_MASK; |
1307 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
1308 | return -EINVAL; |
1309 | type &= SOCK_TYPE_MASK; |
1310 | |
1311 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1312 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
1313 | |
1314 | retval = sock_create(family, type, protocol, &sock); |
1315 | if (retval < 0) |
1316 | goto out; |
1317 | |
1318 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1319 | if (retval < 0) |
1320 | goto out_release; |
1321 | |
1322 | out: |
1323 | /* It may be already another descriptor 8) Not kernel problem. */ |
1324 | return retval; |
1325 | |
1326 | out_release: |
1327 | sock_release(sock); |
1328 | return retval; |
1329 | } |
1330 | |
1331 | /* |
1332 | * Create a pair of connected sockets. |
1333 | */ |
1334 | |
1335 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1336 | int __user *, usockvec) |
1337 | { |
1338 | struct socket *sock1, *sock2; |
1339 | int fd1, fd2, err; |
1340 | struct file *newfile1, *newfile2; |
1341 | int flags; |
1342 | |
1343 | flags = type & ~SOCK_TYPE_MASK; |
1344 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
1345 | return -EINVAL; |
1346 | type &= SOCK_TYPE_MASK; |
1347 | |
1348 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1349 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
1350 | |
1351 | /* |
1352 | * Obtain the first socket and check if the underlying protocol |
1353 | * supports the socketpair call. |
1354 | */ |
1355 | |
1356 | err = sock_create(family, type, protocol, &sock1); |
1357 | if (err < 0) |
1358 | goto out; |
1359 | |
1360 | err = sock_create(family, type, protocol, &sock2); |
1361 | if (err < 0) |
1362 | goto out_release_1; |
1363 | |
1364 | err = sock1->ops->socketpair(sock1, sock2); |
1365 | if (err < 0) |
1366 | goto out_release_both; |
1367 | |
1368 | fd1 = sock_alloc_file(sock1, &newfile1, flags); |
1369 | if (unlikely(fd1 < 0)) { |
1370 | err = fd1; |
1371 | goto out_release_both; |
1372 | } |
1373 | |
1374 | fd2 = sock_alloc_file(sock2, &newfile2, flags); |
1375 | if (unlikely(fd2 < 0)) { |
1376 | err = fd2; |
1377 | fput(newfile1); |
1378 | put_unused_fd(fd1); |
1379 | sock_release(sock2); |
1380 | goto out; |
1381 | } |
1382 | |
1383 | audit_fd_pair(fd1, fd2); |
1384 | fd_install(fd1, newfile1); |
1385 | fd_install(fd2, newfile2); |
1386 | /* fd1 and fd2 may be already another descriptors. |
1387 | * Not kernel problem. |
1388 | */ |
1389 | |
1390 | err = put_user(fd1, &usockvec[0]); |
1391 | if (!err) |
1392 | err = put_user(fd2, &usockvec[1]); |
1393 | if (!err) |
1394 | return 0; |
1395 | |
1396 | sys_close(fd2); |
1397 | sys_close(fd1); |
1398 | return err; |
1399 | |
1400 | out_release_both: |
1401 | sock_release(sock2); |
1402 | out_release_1: |
1403 | sock_release(sock1); |
1404 | out: |
1405 | return err; |
1406 | } |
1407 | |
1408 | /* |
1409 | * Bind a name to a socket. Nothing much to do here since it's |
1410 | * the protocol's responsibility to handle the local address. |
1411 | * |
1412 | * We move the socket address to kernel space before we call |
1413 | * the protocol layer (having also checked the address is ok). |
1414 | */ |
1415 | |
1416 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1417 | { |
1418 | struct socket *sock; |
1419 | struct sockaddr_storage address; |
1420 | int err, fput_needed; |
1421 | |
1422 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1423 | if (sock) { |
1424 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
1425 | if (err >= 0) { |
1426 | err = security_socket_bind(sock, |
1427 | (struct sockaddr *)&address, |
1428 | addrlen); |
1429 | if (!err) |
1430 | err = sock->ops->bind(sock, |
1431 | (struct sockaddr *) |
1432 | &address, addrlen); |
1433 | } |
1434 | fput_light(sock->file, fput_needed); |
1435 | } |
1436 | return err; |
1437 | } |
1438 | |
1439 | /* |
1440 | * Perform a listen. Basically, we allow the protocol to do anything |
1441 | * necessary for a listen, and if that works, we mark the socket as |
1442 | * ready for listening. |
1443 | */ |
1444 | |
1445 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1446 | { |
1447 | struct socket *sock; |
1448 | int err, fput_needed; |
1449 | int somaxconn; |
1450 | |
1451 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1452 | if (sock) { |
1453 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
1454 | if ((unsigned)backlog > somaxconn) |
1455 | backlog = somaxconn; |
1456 | |
1457 | err = security_socket_listen(sock, backlog); |
1458 | if (!err) |
1459 | err = sock->ops->listen(sock, backlog); |
1460 | |
1461 | fput_light(sock->file, fput_needed); |
1462 | } |
1463 | return err; |
1464 | } |
1465 | |
1466 | /* |
1467 | * For accept, we attempt to create a new socket, set up the link |
1468 | * with the client, wake up the client, then return the new |
1469 | * connected fd. We collect the address of the connector in kernel |
1470 | * space and move it to user at the very end. This is unclean because |
1471 | * we open the socket then return an error. |
1472 | * |
1473 | * 1003.1g adds the ability to recvmsg() to query connection pending |
1474 | * status to recvmsg. We need to add that support in a way thats |
1475 | * clean when we restucture accept also. |
1476 | */ |
1477 | |
1478 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1479 | int __user *, upeer_addrlen, int, flags) |
1480 | { |
1481 | struct socket *sock, *newsock; |
1482 | struct file *newfile; |
1483 | int err, len, newfd, fput_needed; |
1484 | struct sockaddr_storage address; |
1485 | |
1486 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
1487 | return -EINVAL; |
1488 | |
1489 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1490 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
1491 | |
1492 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1493 | if (!sock) |
1494 | goto out; |
1495 | |
1496 | err = -ENFILE; |
1497 | if (!(newsock = sock_alloc())) |
1498 | goto out_put; |
1499 | |
1500 | newsock->type = sock->type; |
1501 | newsock->ops = sock->ops; |
1502 | |
1503 | /* |
1504 | * We don't need try_module_get here, as the listening socket (sock) |
1505 | * has the protocol module (sock->ops->owner) held. |
1506 | */ |
1507 | __module_get(newsock->ops->owner); |
1508 | |
1509 | newfd = sock_alloc_file(newsock, &newfile, flags); |
1510 | if (unlikely(newfd < 0)) { |
1511 | err = newfd; |
1512 | sock_release(newsock); |
1513 | goto out_put; |
1514 | } |
1515 | |
1516 | err = security_socket_accept(sock, newsock); |
1517 | if (err) |
1518 | goto out_fd; |
1519 | |
1520 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1521 | if (err < 0) |
1522 | goto out_fd; |
1523 | |
1524 | if (upeer_sockaddr) { |
1525 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
1526 | &len, 2) < 0) { |
1527 | err = -ECONNABORTED; |
1528 | goto out_fd; |
1529 | } |
1530 | err = move_addr_to_user((struct sockaddr *)&address, |
1531 | len, upeer_sockaddr, upeer_addrlen); |
1532 | if (err < 0) |
1533 | goto out_fd; |
1534 | } |
1535 | |
1536 | /* File flags are not inherited via accept() unlike another OSes. */ |
1537 | |
1538 | fd_install(newfd, newfile); |
1539 | err = newfd; |
1540 | |
1541 | out_put: |
1542 | fput_light(sock->file, fput_needed); |
1543 | out: |
1544 | return err; |
1545 | out_fd: |
1546 | fput(newfile); |
1547 | put_unused_fd(newfd); |
1548 | goto out_put; |
1549 | } |
1550 | |
1551 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1552 | int __user *, upeer_addrlen) |
1553 | { |
1554 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
1555 | } |
1556 | |
1557 | /* |
1558 | * Attempt to connect to a socket with the server address. The address |
1559 | * is in user space so we verify it is OK and move it to kernel space. |
1560 | * |
1561 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
1562 | * break bindings |
1563 | * |
1564 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
1565 | * other SEQPACKET protocols that take time to connect() as it doesn't |
1566 | * include the -EINPROGRESS status for such sockets. |
1567 | */ |
1568 | |
1569 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1570 | int, addrlen) |
1571 | { |
1572 | struct socket *sock; |
1573 | struct sockaddr_storage address; |
1574 | int err, fput_needed; |
1575 | |
1576 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1577 | if (!sock) |
1578 | goto out; |
1579 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
1580 | if (err < 0) |
1581 | goto out_put; |
1582 | |
1583 | err = |
1584 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1585 | if (err) |
1586 | goto out_put; |
1587 | |
1588 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1589 | sock->file->f_flags); |
1590 | out_put: |
1591 | fput_light(sock->file, fput_needed); |
1592 | out: |
1593 | return err; |
1594 | } |
1595 | |
1596 | /* |
1597 | * Get the local address ('name') of a socket object. Move the obtained |
1598 | * name to user space. |
1599 | */ |
1600 | |
1601 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1602 | int __user *, usockaddr_len) |
1603 | { |
1604 | struct socket *sock; |
1605 | struct sockaddr_storage address; |
1606 | int len, err, fput_needed; |
1607 | |
1608 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1609 | if (!sock) |
1610 | goto out; |
1611 | |
1612 | err = security_socket_getsockname(sock); |
1613 | if (err) |
1614 | goto out_put; |
1615 | |
1616 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1617 | if (err) |
1618 | goto out_put; |
1619 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
1620 | |
1621 | out_put: |
1622 | fput_light(sock->file, fput_needed); |
1623 | out: |
1624 | return err; |
1625 | } |
1626 | |
1627 | /* |
1628 | * Get the remote address ('name') of a socket object. Move the obtained |
1629 | * name to user space. |
1630 | */ |
1631 | |
1632 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1633 | int __user *, usockaddr_len) |
1634 | { |
1635 | struct socket *sock; |
1636 | struct sockaddr_storage address; |
1637 | int len, err, fput_needed; |
1638 | |
1639 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1640 | if (sock != NULL) { |
1641 | err = security_socket_getpeername(sock); |
1642 | if (err) { |
1643 | fput_light(sock->file, fput_needed); |
1644 | return err; |
1645 | } |
1646 | |
1647 | err = |
1648 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
1649 | 1); |
1650 | if (!err) |
1651 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
1652 | usockaddr_len); |
1653 | fput_light(sock->file, fput_needed); |
1654 | } |
1655 | return err; |
1656 | } |
1657 | |
1658 | /* |
1659 | * Send a datagram to a given address. We move the address into kernel |
1660 | * space and check the user space data area is readable before invoking |
1661 | * the protocol. |
1662 | */ |
1663 | |
1664 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
1665 | unsigned, flags, struct sockaddr __user *, addr, |
1666 | int, addr_len) |
1667 | { |
1668 | struct socket *sock; |
1669 | struct sockaddr_storage address; |
1670 | int err; |
1671 | struct msghdr msg; |
1672 | struct iovec iov; |
1673 | int fput_needed; |
1674 | |
1675 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1676 | if (!sock) |
1677 | goto out; |
1678 | |
1679 | iov.iov_base = buff; |
1680 | iov.iov_len = len; |
1681 | msg.msg_name = NULL; |
1682 | msg.msg_iov = &iov; |
1683 | msg.msg_iovlen = 1; |
1684 | msg.msg_control = NULL; |
1685 | msg.msg_controllen = 0; |
1686 | msg.msg_namelen = 0; |
1687 | if (addr) { |
1688 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
1689 | if (err < 0) |
1690 | goto out_put; |
1691 | msg.msg_name = (struct sockaddr *)&address; |
1692 | msg.msg_namelen = addr_len; |
1693 | } |
1694 | if (sock->file->f_flags & O_NONBLOCK) |
1695 | flags |= MSG_DONTWAIT; |
1696 | msg.msg_flags = flags; |
1697 | err = sock_sendmsg(sock, &msg, len); |
1698 | |
1699 | out_put: |
1700 | fput_light(sock->file, fput_needed); |
1701 | out: |
1702 | return err; |
1703 | } |
1704 | |
1705 | /* |
1706 | * Send a datagram down a socket. |
1707 | */ |
1708 | |
1709 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
1710 | unsigned, flags) |
1711 | { |
1712 | return sys_sendto(fd, buff, len, flags, NULL, 0); |
1713 | } |
1714 | |
1715 | /* |
1716 | * Receive a frame from the socket and optionally record the address of the |
1717 | * sender. We verify the buffers are writable and if needed move the |
1718 | * sender address from kernel to user space. |
1719 | */ |
1720 | |
1721 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
1722 | unsigned, flags, struct sockaddr __user *, addr, |
1723 | int __user *, addr_len) |
1724 | { |
1725 | struct socket *sock; |
1726 | struct iovec iov; |
1727 | struct msghdr msg; |
1728 | struct sockaddr_storage address; |
1729 | int err, err2; |
1730 | int fput_needed; |
1731 | |
1732 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1733 | if (!sock) |
1734 | goto out; |
1735 | |
1736 | msg.msg_control = NULL; |
1737 | msg.msg_controllen = 0; |
1738 | msg.msg_iovlen = 1; |
1739 | msg.msg_iov = &iov; |
1740 | iov.iov_len = size; |
1741 | iov.iov_base = ubuf; |
1742 | msg.msg_name = (struct sockaddr *)&address; |
1743 | msg.msg_namelen = sizeof(address); |
1744 | if (sock->file->f_flags & O_NONBLOCK) |
1745 | flags |= MSG_DONTWAIT; |
1746 | err = sock_recvmsg(sock, &msg, size, flags); |
1747 | |
1748 | if (err >= 0 && addr != NULL) { |
1749 | err2 = move_addr_to_user((struct sockaddr *)&address, |
1750 | msg.msg_namelen, addr, addr_len); |
1751 | if (err2 < 0) |
1752 | err = err2; |
1753 | } |
1754 | |
1755 | fput_light(sock->file, fput_needed); |
1756 | out: |
1757 | return err; |
1758 | } |
1759 | |
1760 | /* |
1761 | * Receive a datagram from a socket. |
1762 | */ |
1763 | |
1764 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
1765 | unsigned flags) |
1766 | { |
1767 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
1768 | } |
1769 | |
1770 | /* |
1771 | * Set a socket option. Because we don't know the option lengths we have |
1772 | * to pass the user mode parameter for the protocols to sort out. |
1773 | */ |
1774 | |
1775 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1776 | char __user *, optval, int, optlen) |
1777 | { |
1778 | int err, fput_needed; |
1779 | struct socket *sock; |
1780 | |
1781 | if (optlen < 0) |
1782 | return -EINVAL; |
1783 | |
1784 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1785 | if (sock != NULL) { |
1786 | err = security_socket_setsockopt(sock, level, optname); |
1787 | if (err) |
1788 | goto out_put; |
1789 | |
1790 | if (level == SOL_SOCKET) |
1791 | err = |
1792 | sock_setsockopt(sock, level, optname, optval, |
1793 | optlen); |
1794 | else |
1795 | err = |
1796 | sock->ops->setsockopt(sock, level, optname, optval, |
1797 | optlen); |
1798 | out_put: |
1799 | fput_light(sock->file, fput_needed); |
1800 | } |
1801 | return err; |
1802 | } |
1803 | |
1804 | /* |
1805 | * Get a socket option. Because we don't know the option lengths we have |
1806 | * to pass a user mode parameter for the protocols to sort out. |
1807 | */ |
1808 | |
1809 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1810 | char __user *, optval, int __user *, optlen) |
1811 | { |
1812 | int err, fput_needed; |
1813 | struct socket *sock; |
1814 | |
1815 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1816 | if (sock != NULL) { |
1817 | err = security_socket_getsockopt(sock, level, optname); |
1818 | if (err) |
1819 | goto out_put; |
1820 | |
1821 | if (level == SOL_SOCKET) |
1822 | err = |
1823 | sock_getsockopt(sock, level, optname, optval, |
1824 | optlen); |
1825 | else |
1826 | err = |
1827 | sock->ops->getsockopt(sock, level, optname, optval, |
1828 | optlen); |
1829 | out_put: |
1830 | fput_light(sock->file, fput_needed); |
1831 | } |
1832 | return err; |
1833 | } |
1834 | |
1835 | /* |
1836 | * Shutdown a socket. |
1837 | */ |
1838 | |
1839 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1840 | { |
1841 | int err, fput_needed; |
1842 | struct socket *sock; |
1843 | |
1844 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1845 | if (sock != NULL) { |
1846 | err = security_socket_shutdown(sock, how); |
1847 | if (!err) |
1848 | err = sock->ops->shutdown(sock, how); |
1849 | fput_light(sock->file, fput_needed); |
1850 | } |
1851 | return err; |
1852 | } |
1853 | |
1854 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1855 | * fields which are the same type (int / unsigned) on our platforms. |
1856 | */ |
1857 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
1858 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
1859 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
1860 | |
1861 | /* |
1862 | * BSD sendmsg interface |
1863 | */ |
1864 | |
1865 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
1866 | { |
1867 | struct compat_msghdr __user *msg_compat = |
1868 | (struct compat_msghdr __user *)msg; |
1869 | struct socket *sock; |
1870 | struct sockaddr_storage address; |
1871 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
1872 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
1873 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1874 | /* 20 is size of ipv6_pktinfo */ |
1875 | unsigned char *ctl_buf = ctl; |
1876 | struct msghdr msg_sys; |
1877 | int err, ctl_len, iov_size, total_len; |
1878 | int fput_needed; |
1879 | |
1880 | err = -EFAULT; |
1881 | if (MSG_CMSG_COMPAT & flags) { |
1882 | if (get_compat_msghdr(&msg_sys, msg_compat)) |
1883 | return -EFAULT; |
1884 | } |
1885 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) |
1886 | return -EFAULT; |
1887 | |
1888 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1889 | if (!sock) |
1890 | goto out; |
1891 | |
1892 | /* do not move before msg_sys is valid */ |
1893 | err = -EMSGSIZE; |
1894 | if (msg_sys.msg_iovlen > UIO_MAXIOV) |
1895 | goto out_put; |
1896 | |
1897 | /* Check whether to allocate the iovec area */ |
1898 | err = -ENOMEM; |
1899 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); |
1900 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { |
1901 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
1902 | if (!iov) |
1903 | goto out_put; |
1904 | } |
1905 | |
1906 | /* This will also move the address data into kernel space */ |
1907 | if (MSG_CMSG_COMPAT & flags) { |
1908 | err = verify_compat_iovec(&msg_sys, iov, |
1909 | (struct sockaddr *)&address, |
1910 | VERIFY_READ); |
1911 | } else |
1912 | err = verify_iovec(&msg_sys, iov, |
1913 | (struct sockaddr *)&address, |
1914 | VERIFY_READ); |
1915 | if (err < 0) |
1916 | goto out_freeiov; |
1917 | total_len = err; |
1918 | |
1919 | err = -ENOBUFS; |
1920 | |
1921 | if (msg_sys.msg_controllen > INT_MAX) |
1922 | goto out_freeiov; |
1923 | ctl_len = msg_sys.msg_controllen; |
1924 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
1925 | err = |
1926 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, |
1927 | sizeof(ctl)); |
1928 | if (err) |
1929 | goto out_freeiov; |
1930 | ctl_buf = msg_sys.msg_control; |
1931 | ctl_len = msg_sys.msg_controllen; |
1932 | } else if (ctl_len) { |
1933 | if (ctl_len > sizeof(ctl)) { |
1934 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
1935 | if (ctl_buf == NULL) |
1936 | goto out_freeiov; |
1937 | } |
1938 | err = -EFAULT; |
1939 | /* |
1940 | * Careful! Before this, msg_sys.msg_control contains a user pointer. |
1941 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
1942 | * checking falls down on this. |
1943 | */ |
1944 | if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, |
1945 | ctl_len)) |
1946 | goto out_freectl; |
1947 | msg_sys.msg_control = ctl_buf; |
1948 | } |
1949 | msg_sys.msg_flags = flags; |
1950 | |
1951 | if (sock->file->f_flags & O_NONBLOCK) |
1952 | msg_sys.msg_flags |= MSG_DONTWAIT; |
1953 | err = sock_sendmsg(sock, &msg_sys, total_len); |
1954 | |
1955 | out_freectl: |
1956 | if (ctl_buf != ctl) |
1957 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
1958 | out_freeiov: |
1959 | if (iov != iovstack) |
1960 | sock_kfree_s(sock->sk, iov, iov_size); |
1961 | out_put: |
1962 | fput_light(sock->file, fput_needed); |
1963 | out: |
1964 | return err; |
1965 | } |
1966 | |
1967 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
1968 | struct msghdr *msg_sys, unsigned flags, int nosec) |
1969 | { |
1970 | struct compat_msghdr __user *msg_compat = |
1971 | (struct compat_msghdr __user *)msg; |
1972 | struct iovec iovstack[UIO_FASTIOV]; |
1973 | struct iovec *iov = iovstack; |
1974 | unsigned long cmsg_ptr; |
1975 | int err, iov_size, total_len, len; |
1976 | |
1977 | /* kernel mode address */ |
1978 | struct sockaddr_storage addr; |
1979 | |
1980 | /* user mode address pointers */ |
1981 | struct sockaddr __user *uaddr; |
1982 | int __user *uaddr_len; |
1983 | |
1984 | if (MSG_CMSG_COMPAT & flags) { |
1985 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1986 | return -EFAULT; |
1987 | } |
1988 | else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
1989 | return -EFAULT; |
1990 | |
1991 | err = -EMSGSIZE; |
1992 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
1993 | goto out; |
1994 | |
1995 | /* Check whether to allocate the iovec area */ |
1996 | err = -ENOMEM; |
1997 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
1998 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
1999 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
2000 | if (!iov) |
2001 | goto out; |
2002 | } |
2003 | |
2004 | /* |
2005 | * Save the user-mode address (verify_iovec will change the |
2006 | * kernel msghdr to use the kernel address space) |
2007 | */ |
2008 | |
2009 | uaddr = (__force void __user *)msg_sys->msg_name; |
2010 | uaddr_len = COMPAT_NAMELEN(msg); |
2011 | if (MSG_CMSG_COMPAT & flags) { |
2012 | err = verify_compat_iovec(msg_sys, iov, |
2013 | (struct sockaddr *)&addr, |
2014 | VERIFY_WRITE); |
2015 | } else |
2016 | err = verify_iovec(msg_sys, iov, |
2017 | (struct sockaddr *)&addr, |
2018 | VERIFY_WRITE); |
2019 | if (err < 0) |
2020 | goto out_freeiov; |
2021 | total_len = err; |
2022 | |
2023 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2024 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
2025 | |
2026 | if (sock->file->f_flags & O_NONBLOCK) |
2027 | flags |= MSG_DONTWAIT; |
2028 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2029 | total_len, flags); |
2030 | if (err < 0) |
2031 | goto out_freeiov; |
2032 | len = err; |
2033 | |
2034 | if (uaddr != NULL) { |
2035 | err = move_addr_to_user((struct sockaddr *)&addr, |
2036 | msg_sys->msg_namelen, uaddr, |
2037 | uaddr_len); |
2038 | if (err < 0) |
2039 | goto out_freeiov; |
2040 | } |
2041 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
2042 | COMPAT_FLAGS(msg)); |
2043 | if (err) |
2044 | goto out_freeiov; |
2045 | if (MSG_CMSG_COMPAT & flags) |
2046 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
2047 | &msg_compat->msg_controllen); |
2048 | else |
2049 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
2050 | &msg->msg_controllen); |
2051 | if (err) |
2052 | goto out_freeiov; |
2053 | err = len; |
2054 | |
2055 | out_freeiov: |
2056 | if (iov != iovstack) |
2057 | sock_kfree_s(sock->sk, iov, iov_size); |
2058 | out: |
2059 | return err; |
2060 | } |
2061 | |
2062 | /* |
2063 | * BSD recvmsg interface |
2064 | */ |
2065 | |
2066 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
2067 | unsigned int, flags) |
2068 | { |
2069 | int fput_needed, err; |
2070 | struct msghdr msg_sys; |
2071 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); |
2072 | |
2073 | if (!sock) |
2074 | goto out; |
2075 | |
2076 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
2077 | |
2078 | fput_light(sock->file, fput_needed); |
2079 | out: |
2080 | return err; |
2081 | } |
2082 | |
2083 | /* |
2084 | * Linux recvmmsg interface |
2085 | */ |
2086 | |
2087 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
2088 | unsigned int flags, struct timespec *timeout) |
2089 | { |
2090 | int fput_needed, err, datagrams; |
2091 | struct socket *sock; |
2092 | struct mmsghdr __user *entry; |
2093 | struct compat_mmsghdr __user *compat_entry; |
2094 | struct msghdr msg_sys; |
2095 | struct timespec end_time; |
2096 | |
2097 | if (timeout && |
2098 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
2099 | timeout->tv_nsec)) |
2100 | return -EINVAL; |
2101 | |
2102 | datagrams = 0; |
2103 | |
2104 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
2105 | if (!sock) |
2106 | return err; |
2107 | |
2108 | err = sock_error(sock->sk); |
2109 | if (err) |
2110 | goto out_put; |
2111 | |
2112 | entry = mmsg; |
2113 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
2114 | |
2115 | while (datagrams < vlen) { |
2116 | /* |
2117 | * No need to ask LSM for more than the first datagram. |
2118 | */ |
2119 | if (MSG_CMSG_COMPAT & flags) { |
2120 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
2121 | &msg_sys, flags, datagrams); |
2122 | if (err < 0) |
2123 | break; |
2124 | err = __put_user(err, &compat_entry->msg_len); |
2125 | ++compat_entry; |
2126 | } else { |
2127 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, |
2128 | &msg_sys, flags, datagrams); |
2129 | if (err < 0) |
2130 | break; |
2131 | err = put_user(err, &entry->msg_len); |
2132 | ++entry; |
2133 | } |
2134 | |
2135 | if (err) |
2136 | break; |
2137 | ++datagrams; |
2138 | |
2139 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2140 | if (flags & MSG_WAITFORONE) |
2141 | flags |= MSG_DONTWAIT; |
2142 | |
2143 | if (timeout) { |
2144 | ktime_get_ts(timeout); |
2145 | *timeout = timespec_sub(end_time, *timeout); |
2146 | if (timeout->tv_sec < 0) { |
2147 | timeout->tv_sec = timeout->tv_nsec = 0; |
2148 | break; |
2149 | } |
2150 | |
2151 | /* Timeout, return less than vlen datagrams */ |
2152 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
2153 | break; |
2154 | } |
2155 | |
2156 | /* Out of band data, return right away */ |
2157 | if (msg_sys.msg_flags & MSG_OOB) |
2158 | break; |
2159 | } |
2160 | |
2161 | out_put: |
2162 | fput_light(sock->file, fput_needed); |
2163 | |
2164 | if (err == 0) |
2165 | return datagrams; |
2166 | |
2167 | if (datagrams != 0) { |
2168 | /* |
2169 | * We may return less entries than requested (vlen) if the |
2170 | * sock is non block and there aren't enough datagrams... |
2171 | */ |
2172 | if (err != -EAGAIN) { |
2173 | /* |
2174 | * ... or if recvmsg returns an error after we |
2175 | * received some datagrams, where we record the |
2176 | * error to return on the next call or if the |
2177 | * app asks about it using getsockopt(SO_ERROR). |
2178 | */ |
2179 | sock->sk->sk_err = -err; |
2180 | } |
2181 | |
2182 | return datagrams; |
2183 | } |
2184 | |
2185 | return err; |
2186 | } |
2187 | |
2188 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
2189 | unsigned int, vlen, unsigned int, flags, |
2190 | struct timespec __user *, timeout) |
2191 | { |
2192 | int datagrams; |
2193 | struct timespec timeout_sys; |
2194 | |
2195 | if (!timeout) |
2196 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); |
2197 | |
2198 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) |
2199 | return -EFAULT; |
2200 | |
2201 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
2202 | |
2203 | if (datagrams > 0 && |
2204 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) |
2205 | datagrams = -EFAULT; |
2206 | |
2207 | return datagrams; |
2208 | } |
2209 | |
2210 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
2211 | /* Argument list sizes for sys_socketcall */ |
2212 | #define AL(x) ((x) * sizeof(unsigned long)) |
2213 | static const unsigned char nargs[20] = { |
2214 | AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
2215 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), |
2216 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
2217 | AL(4),AL(5) |
2218 | }; |
2219 | |
2220 | #undef AL |
2221 | |
2222 | /* |
2223 | * System call vectors. |
2224 | * |
2225 | * Argument checking cleaned up. Saved 20% in size. |
2226 | * This function doesn't need to set the kernel lock because |
2227 | * it is set by the callees. |
2228 | */ |
2229 | |
2230 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
2231 | { |
2232 | unsigned long a[6]; |
2233 | unsigned long a0, a1; |
2234 | int err; |
2235 | unsigned int len; |
2236 | |
2237 | if (call < 1 || call > SYS_RECVMMSG) |
2238 | return -EINVAL; |
2239 | |
2240 | len = nargs[call]; |
2241 | if (len > sizeof(a)) |
2242 | return -EINVAL; |
2243 | |
2244 | /* copy_from_user should be SMP safe. */ |
2245 | if (copy_from_user(a, args, len)) |
2246 | return -EFAULT; |
2247 | |
2248 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2249 | |
2250 | a0 = a[0]; |
2251 | a1 = a[1]; |
2252 | |
2253 | switch (call) { |
2254 | case SYS_SOCKET: |
2255 | err = sys_socket(a0, a1, a[2]); |
2256 | break; |
2257 | case SYS_BIND: |
2258 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
2259 | break; |
2260 | case SYS_CONNECT: |
2261 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
2262 | break; |
2263 | case SYS_LISTEN: |
2264 | err = sys_listen(a0, a1); |
2265 | break; |
2266 | case SYS_ACCEPT: |
2267 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2268 | (int __user *)a[2], 0); |
2269 | break; |
2270 | case SYS_GETSOCKNAME: |
2271 | err = |
2272 | sys_getsockname(a0, (struct sockaddr __user *)a1, |
2273 | (int __user *)a[2]); |
2274 | break; |
2275 | case SYS_GETPEERNAME: |
2276 | err = |
2277 | sys_getpeername(a0, (struct sockaddr __user *)a1, |
2278 | (int __user *)a[2]); |
2279 | break; |
2280 | case SYS_SOCKETPAIR: |
2281 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
2282 | break; |
2283 | case SYS_SEND: |
2284 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); |
2285 | break; |
2286 | case SYS_SENDTO: |
2287 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], |
2288 | (struct sockaddr __user *)a[4], a[5]); |
2289 | break; |
2290 | case SYS_RECV: |
2291 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); |
2292 | break; |
2293 | case SYS_RECVFROM: |
2294 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
2295 | (struct sockaddr __user *)a[4], |
2296 | (int __user *)a[5]); |
2297 | break; |
2298 | case SYS_SHUTDOWN: |
2299 | err = sys_shutdown(a0, a1); |
2300 | break; |
2301 | case SYS_SETSOCKOPT: |
2302 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
2303 | break; |
2304 | case SYS_GETSOCKOPT: |
2305 | err = |
2306 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
2307 | (int __user *)a[4]); |
2308 | break; |
2309 | case SYS_SENDMSG: |
2310 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); |
2311 | break; |
2312 | case SYS_RECVMSG: |
2313 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); |
2314 | break; |
2315 | case SYS_RECVMMSG: |
2316 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], |
2317 | (struct timespec __user *)a[4]); |
2318 | break; |
2319 | case SYS_ACCEPT4: |
2320 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2321 | (int __user *)a[2], a[3]); |
2322 | break; |
2323 | default: |
2324 | err = -EINVAL; |
2325 | break; |
2326 | } |
2327 | return err; |
2328 | } |
2329 | |
2330 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
2331 | |
2332 | /** |
2333 | * sock_register - add a socket protocol handler |
2334 | * @ops: description of protocol |
2335 | * |
2336 | * This function is called by a protocol handler that wants to |
2337 | * advertise its address family, and have it linked into the |
2338 | * socket interface. The value ops->family coresponds to the |
2339 | * socket system call protocol family. |
2340 | */ |
2341 | int sock_register(const struct net_proto_family *ops) |
2342 | { |
2343 | int err; |
2344 | |
2345 | if (ops->family >= NPROTO) { |
2346 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2347 | NPROTO); |
2348 | return -ENOBUFS; |
2349 | } |
2350 | |
2351 | spin_lock(&net_family_lock); |
2352 | if (net_families[ops->family]) |
2353 | err = -EEXIST; |
2354 | else { |
2355 | net_families[ops->family] = ops; |
2356 | err = 0; |
2357 | } |
2358 | spin_unlock(&net_family_lock); |
2359 | |
2360 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
2361 | return err; |
2362 | } |
2363 | |
2364 | /** |
2365 | * sock_unregister - remove a protocol handler |
2366 | * @family: protocol family to remove |
2367 | * |
2368 | * This function is called by a protocol handler that wants to |
2369 | * remove its address family, and have it unlinked from the |
2370 | * new socket creation. |
2371 | * |
2372 | * If protocol handler is a module, then it can use module reference |
2373 | * counts to protect against new references. If protocol handler is not |
2374 | * a module then it needs to provide its own protection in |
2375 | * the ops->create routine. |
2376 | */ |
2377 | void sock_unregister(int family) |
2378 | { |
2379 | BUG_ON(family < 0 || family >= NPROTO); |
2380 | |
2381 | spin_lock(&net_family_lock); |
2382 | net_families[family] = NULL; |
2383 | spin_unlock(&net_family_lock); |
2384 | |
2385 | synchronize_rcu(); |
2386 | |
2387 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
2388 | } |
2389 | |
2390 | static int __init sock_init(void) |
2391 | { |
2392 | /* |
2393 | * Initialize sock SLAB cache. |
2394 | */ |
2395 | |
2396 | sk_init(); |
2397 | |
2398 | /* |
2399 | * Initialize skbuff SLAB cache |
2400 | */ |
2401 | skb_init(); |
2402 | |
2403 | /* |
2404 | * Initialize the protocols module. |
2405 | */ |
2406 | |
2407 | init_inodecache(); |
2408 | register_filesystem(&sock_fs_type); |
2409 | sock_mnt = kern_mount(&sock_fs_type); |
2410 | |
2411 | /* The real protocol initialization is performed in later initcalls. |
2412 | */ |
2413 | |
2414 | #ifdef CONFIG_NETFILTER |
2415 | netfilter_init(); |
2416 | #endif |
2417 | |
2418 | return 0; |
2419 | } |
2420 | |
2421 | core_initcall(sock_init); /* early initcall */ |
2422 | |
2423 | #ifdef CONFIG_PROC_FS |
2424 | void socket_seq_show(struct seq_file *seq) |
2425 | { |
2426 | int cpu; |
2427 | int counter = 0; |
2428 | |
2429 | for_each_possible_cpu(cpu) |
2430 | counter += per_cpu(sockets_in_use, cpu); |
2431 | |
2432 | /* It can be negative, by the way. 8) */ |
2433 | if (counter < 0) |
2434 | counter = 0; |
2435 | |
2436 | seq_printf(seq, "sockets: used %d\n", counter); |
2437 | } |
2438 | #endif /* CONFIG_PROC_FS */ |
2439 | |
2440 | #ifdef CONFIG_COMPAT |
2441 | static int do_siocgstamp(struct net *net, struct socket *sock, |
2442 | unsigned int cmd, struct compat_timeval __user *up) |
2443 | { |
2444 | mm_segment_t old_fs = get_fs(); |
2445 | struct timeval ktv; |
2446 | int err; |
2447 | |
2448 | set_fs(KERNEL_DS); |
2449 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
2450 | set_fs(old_fs); |
2451 | if (!err) { |
2452 | err = put_user(ktv.tv_sec, &up->tv_sec); |
2453 | err |= __put_user(ktv.tv_usec, &up->tv_usec); |
2454 | } |
2455 | return err; |
2456 | } |
2457 | |
2458 | static int do_siocgstampns(struct net *net, struct socket *sock, |
2459 | unsigned int cmd, struct compat_timespec __user *up) |
2460 | { |
2461 | mm_segment_t old_fs = get_fs(); |
2462 | struct timespec kts; |
2463 | int err; |
2464 | |
2465 | set_fs(KERNEL_DS); |
2466 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
2467 | set_fs(old_fs); |
2468 | if (!err) { |
2469 | err = put_user(kts.tv_sec, &up->tv_sec); |
2470 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); |
2471 | } |
2472 | return err; |
2473 | } |
2474 | |
2475 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
2476 | { |
2477 | struct ifreq __user *uifr; |
2478 | int err; |
2479 | |
2480 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); |
2481 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2482 | return -EFAULT; |
2483 | |
2484 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
2485 | if (err) |
2486 | return err; |
2487 | |
2488 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
2489 | return -EFAULT; |
2490 | |
2491 | return 0; |
2492 | } |
2493 | |
2494 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
2495 | { |
2496 | struct compat_ifconf ifc32; |
2497 | struct ifconf ifc; |
2498 | struct ifconf __user *uifc; |
2499 | struct compat_ifreq __user *ifr32; |
2500 | struct ifreq __user *ifr; |
2501 | unsigned int i, j; |
2502 | int err; |
2503 | |
2504 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
2505 | return -EFAULT; |
2506 | |
2507 | if (ifc32.ifcbuf == 0) { |
2508 | ifc32.ifc_len = 0; |
2509 | ifc.ifc_len = 0; |
2510 | ifc.ifc_req = NULL; |
2511 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); |
2512 | } else { |
2513 | size_t len =((ifc32.ifc_len / sizeof (struct compat_ifreq)) + 1) * |
2514 | sizeof (struct ifreq); |
2515 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2516 | ifc.ifc_len = len; |
2517 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); |
2518 | ifr32 = compat_ptr(ifc32.ifcbuf); |
2519 | for (i = 0; i < ifc32.ifc_len; i += sizeof (struct compat_ifreq)) { |
2520 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
2521 | return -EFAULT; |
2522 | ifr++; |
2523 | ifr32++; |
2524 | } |
2525 | } |
2526 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) |
2527 | return -EFAULT; |
2528 | |
2529 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
2530 | if (err) |
2531 | return err; |
2532 | |
2533 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) |
2534 | return -EFAULT; |
2535 | |
2536 | ifr = ifc.ifc_req; |
2537 | ifr32 = compat_ptr(ifc32.ifcbuf); |
2538 | for (i = 0, j = 0; |
2539 | i + sizeof (struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2540 | i += sizeof (struct compat_ifreq), j += sizeof (struct ifreq)) { |
2541 | if (copy_in_user(ifr32, ifr, sizeof (struct compat_ifreq))) |
2542 | return -EFAULT; |
2543 | ifr32++; |
2544 | ifr++; |
2545 | } |
2546 | |
2547 | if (ifc32.ifcbuf == 0) { |
2548 | /* Translate from 64-bit structure multiple to |
2549 | * a 32-bit one. |
2550 | */ |
2551 | i = ifc.ifc_len; |
2552 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
2553 | ifc32.ifc_len = i; |
2554 | } else { |
2555 | ifc32.ifc_len = i; |
2556 | } |
2557 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
2558 | return -EFAULT; |
2559 | |
2560 | return 0; |
2561 | } |
2562 | |
2563 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
2564 | { |
2565 | struct ifreq __user *ifr; |
2566 | u32 data; |
2567 | void __user *datap; |
2568 | |
2569 | ifr = compat_alloc_user_space(sizeof(*ifr)); |
2570 | |
2571 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
2572 | return -EFAULT; |
2573 | |
2574 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2575 | return -EFAULT; |
2576 | |
2577 | datap = compat_ptr(data); |
2578 | if (put_user(datap, &ifr->ifr_ifru.ifru_data)) |
2579 | return -EFAULT; |
2580 | |
2581 | return dev_ioctl(net, SIOCETHTOOL, ifr); |
2582 | } |
2583 | |
2584 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2585 | { |
2586 | void __user *uptr; |
2587 | compat_uptr_t uptr32; |
2588 | struct ifreq __user *uifr; |
2589 | |
2590 | uifr = compat_alloc_user_space(sizeof (*uifr)); |
2591 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2592 | return -EFAULT; |
2593 | |
2594 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
2595 | return -EFAULT; |
2596 | |
2597 | uptr = compat_ptr(uptr32); |
2598 | |
2599 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) |
2600 | return -EFAULT; |
2601 | |
2602 | return dev_ioctl(net, SIOCWANDEV, uifr); |
2603 | } |
2604 | |
2605 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2606 | struct compat_ifreq __user *ifr32) |
2607 | { |
2608 | struct ifreq kifr; |
2609 | struct ifreq __user *uifr; |
2610 | mm_segment_t old_fs; |
2611 | int err; |
2612 | u32 data; |
2613 | void __user *datap; |
2614 | |
2615 | switch (cmd) { |
2616 | case SIOCBONDENSLAVE: |
2617 | case SIOCBONDRELEASE: |
2618 | case SIOCBONDSETHWADDR: |
2619 | case SIOCBONDCHANGEACTIVE: |
2620 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
2621 | return -EFAULT; |
2622 | |
2623 | old_fs = get_fs(); |
2624 | set_fs (KERNEL_DS); |
2625 | err = dev_ioctl(net, cmd, &kifr); |
2626 | set_fs (old_fs); |
2627 | |
2628 | return err; |
2629 | case SIOCBONDSLAVEINFOQUERY: |
2630 | case SIOCBONDINFOQUERY: |
2631 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2632 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
2633 | return -EFAULT; |
2634 | |
2635 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2636 | return -EFAULT; |
2637 | |
2638 | datap = compat_ptr(data); |
2639 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) |
2640 | return -EFAULT; |
2641 | |
2642 | return dev_ioctl(net, cmd, uifr); |
2643 | default: |
2644 | return -EINVAL; |
2645 | }; |
2646 | } |
2647 | |
2648 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2649 | struct compat_ifreq __user *u_ifreq32) |
2650 | { |
2651 | struct ifreq __user *u_ifreq64; |
2652 | char tmp_buf[IFNAMSIZ]; |
2653 | void __user *data64; |
2654 | u32 data32; |
2655 | |
2656 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), |
2657 | IFNAMSIZ)) |
2658 | return -EFAULT; |
2659 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
2660 | return -EFAULT; |
2661 | data64 = compat_ptr(data32); |
2662 | |
2663 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); |
2664 | |
2665 | /* Don't check these user accesses, just let that get trapped |
2666 | * in the ioctl handler instead. |
2667 | */ |
2668 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
2669 | IFNAMSIZ)) |
2670 | return -EFAULT; |
2671 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
2672 | return -EFAULT; |
2673 | |
2674 | return dev_ioctl(net, cmd, u_ifreq64); |
2675 | } |
2676 | |
2677 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2678 | unsigned int cmd, struct compat_ifreq __user *uifr32) |
2679 | { |
2680 | struct ifreq __user *uifr; |
2681 | int err; |
2682 | |
2683 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2684 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) |
2685 | return -EFAULT; |
2686 | |
2687 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); |
2688 | |
2689 | if (!err) { |
2690 | switch (cmd) { |
2691 | case SIOCGIFFLAGS: |
2692 | case SIOCGIFMETRIC: |
2693 | case SIOCGIFMTU: |
2694 | case SIOCGIFMEM: |
2695 | case SIOCGIFHWADDR: |
2696 | case SIOCGIFINDEX: |
2697 | case SIOCGIFADDR: |
2698 | case SIOCGIFBRDADDR: |
2699 | case SIOCGIFDSTADDR: |
2700 | case SIOCGIFNETMASK: |
2701 | case SIOCGIFPFLAGS: |
2702 | case SIOCGIFTXQLEN: |
2703 | case SIOCGMIIPHY: |
2704 | case SIOCGMIIREG: |
2705 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
2706 | err = -EFAULT; |
2707 | break; |
2708 | } |
2709 | } |
2710 | return err; |
2711 | } |
2712 | |
2713 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2714 | struct compat_ifreq __user *uifr32) |
2715 | { |
2716 | struct ifreq ifr; |
2717 | struct compat_ifmap __user *uifmap32; |
2718 | mm_segment_t old_fs; |
2719 | int err; |
2720 | |
2721 | uifmap32 = &uifr32->ifr_ifru.ifru_map; |
2722 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); |
2723 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
2724 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
2725 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
2726 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); |
2727 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); |
2728 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); |
2729 | if (err) |
2730 | return -EFAULT; |
2731 | |
2732 | old_fs = get_fs(); |
2733 | set_fs (KERNEL_DS); |
2734 | err = dev_ioctl(net, cmd, (void __user *)&ifr); |
2735 | set_fs (old_fs); |
2736 | |
2737 | if (cmd == SIOCGIFMAP && !err) { |
2738 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); |
2739 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
2740 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
2741 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
2742 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); |
2743 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); |
2744 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); |
2745 | if (err) |
2746 | err = -EFAULT; |
2747 | } |
2748 | return err; |
2749 | } |
2750 | |
2751 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) |
2752 | { |
2753 | void __user *uptr; |
2754 | compat_uptr_t uptr32; |
2755 | struct ifreq __user *uifr; |
2756 | |
2757 | uifr = compat_alloc_user_space(sizeof (*uifr)); |
2758 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2759 | return -EFAULT; |
2760 | |
2761 | if (get_user(uptr32, &uifr32->ifr_data)) |
2762 | return -EFAULT; |
2763 | |
2764 | uptr = compat_ptr(uptr32); |
2765 | |
2766 | if (put_user(uptr, &uifr->ifr_data)) |
2767 | return -EFAULT; |
2768 | |
2769 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); |
2770 | } |
2771 | |
2772 | struct rtentry32 { |
2773 | u32 rt_pad1; |
2774 | struct sockaddr rt_dst; /* target address */ |
2775 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ |
2776 | struct sockaddr rt_genmask; /* target network mask (IP) */ |
2777 | unsigned short rt_flags; |
2778 | short rt_pad2; |
2779 | u32 rt_pad3; |
2780 | unsigned char rt_tos; |
2781 | unsigned char rt_class; |
2782 | short rt_pad4; |
2783 | short rt_metric; /* +1 for binary compatibility! */ |
2784 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
2785 | u32 rt_mtu; /* per route MTU/Window */ |
2786 | u32 rt_window; /* Window clamping */ |
2787 | unsigned short rt_irtt; /* Initial RTT */ |
2788 | }; |
2789 | |
2790 | struct in6_rtmsg32 { |
2791 | struct in6_addr rtmsg_dst; |
2792 | struct in6_addr rtmsg_src; |
2793 | struct in6_addr rtmsg_gateway; |
2794 | u32 rtmsg_type; |
2795 | u16 rtmsg_dst_len; |
2796 | u16 rtmsg_src_len; |
2797 | u32 rtmsg_metric; |
2798 | u32 rtmsg_info; |
2799 | u32 rtmsg_flags; |
2800 | s32 rtmsg_ifindex; |
2801 | }; |
2802 | |
2803 | static int routing_ioctl(struct net *net, struct socket *sock, |
2804 | unsigned int cmd, void __user *argp) |
2805 | { |
2806 | int ret; |
2807 | void *r = NULL; |
2808 | struct in6_rtmsg r6; |
2809 | struct rtentry r4; |
2810 | char devname[16]; |
2811 | u32 rtdev; |
2812 | mm_segment_t old_fs = get_fs(); |
2813 | |
2814 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
2815 | struct in6_rtmsg32 __user *ur6 = argp; |
2816 | ret = copy_from_user (&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
2817 | 3 * sizeof(struct in6_addr)); |
2818 | ret |= __get_user (r6.rtmsg_type, &(ur6->rtmsg_type)); |
2819 | ret |= __get_user (r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); |
2820 | ret |= __get_user (r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); |
2821 | ret |= __get_user (r6.rtmsg_metric, &(ur6->rtmsg_metric)); |
2822 | ret |= __get_user (r6.rtmsg_info, &(ur6->rtmsg_info)); |
2823 | ret |= __get_user (r6.rtmsg_flags, &(ur6->rtmsg_flags)); |
2824 | ret |= __get_user (r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); |
2825 | |
2826 | r = (void *) &r6; |
2827 | } else { /* ipv4 */ |
2828 | struct rtentry32 __user *ur4 = argp; |
2829 | ret = copy_from_user (&r4.rt_dst, &(ur4->rt_dst), |
2830 | 3 * sizeof(struct sockaddr)); |
2831 | ret |= __get_user (r4.rt_flags, &(ur4->rt_flags)); |
2832 | ret |= __get_user (r4.rt_metric, &(ur4->rt_metric)); |
2833 | ret |= __get_user (r4.rt_mtu, &(ur4->rt_mtu)); |
2834 | ret |= __get_user (r4.rt_window, &(ur4->rt_window)); |
2835 | ret |= __get_user (r4.rt_irtt, &(ur4->rt_irtt)); |
2836 | ret |= __get_user (rtdev, &(ur4->rt_dev)); |
2837 | if (rtdev) { |
2838 | ret |= copy_from_user (devname, compat_ptr(rtdev), 15); |
2839 | r4.rt_dev = devname; devname[15] = 0; |
2840 | } else |
2841 | r4.rt_dev = NULL; |
2842 | |
2843 | r = (void *) &r4; |
2844 | } |
2845 | |
2846 | if (ret) { |
2847 | ret = -EFAULT; |
2848 | goto out; |
2849 | } |
2850 | |
2851 | set_fs (KERNEL_DS); |
2852 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
2853 | set_fs (old_fs); |
2854 | |
2855 | out: |
2856 | return ret; |
2857 | } |
2858 | |
2859 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE |
2860 | * for some operations; this forces use of the newer bridge-utils that |
2861 | * use compatiable ioctls |
2862 | */ |
2863 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
2864 | { |
2865 | compat_ulong_t tmp; |
2866 | |
2867 | if (get_user(tmp, argp)) |
2868 | return -EFAULT; |
2869 | if (tmp == BRCTL_GET_VERSION) |
2870 | return BRCTL_VERSION + 1; |
2871 | return -EINVAL; |
2872 | } |
2873 | |
2874 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
2875 | unsigned int cmd, unsigned long arg) |
2876 | { |
2877 | void __user *argp = compat_ptr(arg); |
2878 | struct sock *sk = sock->sk; |
2879 | struct net *net = sock_net(sk); |
2880 | |
2881 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
2882 | return siocdevprivate_ioctl(net, cmd, argp); |
2883 | |
2884 | switch (cmd) { |
2885 | case SIOCSIFBR: |
2886 | case SIOCGIFBR: |
2887 | return old_bridge_ioctl(argp); |
2888 | case SIOCGIFNAME: |
2889 | return dev_ifname32(net, argp); |
2890 | case SIOCGIFCONF: |
2891 | return dev_ifconf(net, argp); |
2892 | case SIOCETHTOOL: |
2893 | return ethtool_ioctl(net, argp); |
2894 | case SIOCWANDEV: |
2895 | return compat_siocwandev(net, argp); |
2896 | case SIOCGIFMAP: |
2897 | case SIOCSIFMAP: |
2898 | return compat_sioc_ifmap(net, cmd, argp); |
2899 | case SIOCBONDENSLAVE: |
2900 | case SIOCBONDRELEASE: |
2901 | case SIOCBONDSETHWADDR: |
2902 | case SIOCBONDSLAVEINFOQUERY: |
2903 | case SIOCBONDINFOQUERY: |
2904 | case SIOCBONDCHANGEACTIVE: |
2905 | return bond_ioctl(net, cmd, argp); |
2906 | case SIOCADDRT: |
2907 | case SIOCDELRT: |
2908 | return routing_ioctl(net, sock, cmd, argp); |
2909 | case SIOCGSTAMP: |
2910 | return do_siocgstamp(net, sock, cmd, argp); |
2911 | case SIOCGSTAMPNS: |
2912 | return do_siocgstampns(net, sock, cmd, argp); |
2913 | case SIOCSHWTSTAMP: |
2914 | return compat_siocshwtstamp(net, argp); |
2915 | |
2916 | case FIOSETOWN: |
2917 | case SIOCSPGRP: |
2918 | case FIOGETOWN: |
2919 | case SIOCGPGRP: |
2920 | case SIOCBRADDBR: |
2921 | case SIOCBRDELBR: |
2922 | case SIOCGIFVLAN: |
2923 | case SIOCSIFVLAN: |
2924 | case SIOCADDDLCI: |
2925 | case SIOCDELDLCI: |
2926 | return sock_ioctl(file, cmd, arg); |
2927 | |
2928 | case SIOCGIFFLAGS: |
2929 | case SIOCSIFFLAGS: |
2930 | case SIOCGIFMETRIC: |
2931 | case SIOCSIFMETRIC: |
2932 | case SIOCGIFMTU: |
2933 | case SIOCSIFMTU: |
2934 | case SIOCGIFMEM: |
2935 | case SIOCSIFMEM: |
2936 | case SIOCGIFHWADDR: |
2937 | case SIOCSIFHWADDR: |
2938 | case SIOCADDMULTI: |
2939 | case SIOCDELMULTI: |
2940 | case SIOCGIFINDEX: |
2941 | case SIOCGIFADDR: |
2942 | case SIOCSIFADDR: |
2943 | case SIOCSIFHWBROADCAST: |
2944 | case SIOCDIFADDR: |
2945 | case SIOCGIFBRDADDR: |
2946 | case SIOCSIFBRDADDR: |
2947 | case SIOCGIFDSTADDR: |
2948 | case SIOCSIFDSTADDR: |
2949 | case SIOCGIFNETMASK: |
2950 | case SIOCSIFNETMASK: |
2951 | case SIOCSIFPFLAGS: |
2952 | case SIOCGIFPFLAGS: |
2953 | case SIOCGIFTXQLEN: |
2954 | case SIOCSIFTXQLEN: |
2955 | case SIOCBRADDIF: |
2956 | case SIOCBRDELIF: |
2957 | case SIOCSIFNAME: |
2958 | case SIOCGMIIPHY: |
2959 | case SIOCGMIIREG: |
2960 | case SIOCSMIIREG: |
2961 | return dev_ifsioc(net, sock, cmd, argp); |
2962 | |
2963 | case SIOCSARP: |
2964 | case SIOCGARP: |
2965 | case SIOCDARP: |
2966 | case SIOCATMARK: |
2967 | return sock_do_ioctl(net, sock, cmd, arg); |
2968 | } |
2969 | |
2970 | /* Prevent warning from compat_sys_ioctl, these always |
2971 | * result in -EINVAL in the native case anyway. */ |
2972 | switch (cmd) { |
2973 | case SIOCRTMSG: |
2974 | case SIOCGIFCOUNT: |
2975 | case SIOCSRARP: |
2976 | case SIOCGRARP: |
2977 | case SIOCDRARP: |
2978 | case SIOCSIFLINK: |
2979 | case SIOCGIFSLAVE: |
2980 | case SIOCSIFSLAVE: |
2981 | return -EINVAL; |
2982 | } |
2983 | |
2984 | return -ENOIOCTLCMD; |
2985 | } |
2986 | |
2987 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
2988 | unsigned long arg) |
2989 | { |
2990 | struct socket *sock = file->private_data; |
2991 | int ret = -ENOIOCTLCMD; |
2992 | struct sock *sk; |
2993 | struct net *net; |
2994 | |
2995 | sk = sock->sk; |
2996 | net = sock_net(sk); |
2997 | |
2998 | if (sock->ops->compat_ioctl) |
2999 | ret = sock->ops->compat_ioctl(sock, cmd, arg); |
3000 | |
3001 | if (ret == -ENOIOCTLCMD && |
3002 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
3003 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
3004 | |
3005 | if (ret == -ENOIOCTLCMD) |
3006 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
3007 | |
3008 | return ret; |
3009 | } |
3010 | #endif |
3011 | |
3012 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3013 | { |
3014 | return sock->ops->bind(sock, addr, addrlen); |
3015 | } |
3016 | |
3017 | int kernel_listen(struct socket *sock, int backlog) |
3018 | { |
3019 | return sock->ops->listen(sock, backlog); |
3020 | } |
3021 | |
3022 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
3023 | { |
3024 | struct sock *sk = sock->sk; |
3025 | int err; |
3026 | |
3027 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
3028 | newsock); |
3029 | if (err < 0) |
3030 | goto done; |
3031 | |
3032 | err = sock->ops->accept(sock, *newsock, flags); |
3033 | if (err < 0) { |
3034 | sock_release(*newsock); |
3035 | *newsock = NULL; |
3036 | goto done; |
3037 | } |
3038 | |
3039 | (*newsock)->ops = sock->ops; |
3040 | __module_get((*newsock)->ops->owner); |
3041 | |
3042 | done: |
3043 | return err; |
3044 | } |
3045 | |
3046 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
3047 | int flags) |
3048 | { |
3049 | return sock->ops->connect(sock, addr, addrlen, flags); |
3050 | } |
3051 | |
3052 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
3053 | int *addrlen) |
3054 | { |
3055 | return sock->ops->getname(sock, addr, addrlen, 0); |
3056 | } |
3057 | |
3058 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
3059 | int *addrlen) |
3060 | { |
3061 | return sock->ops->getname(sock, addr, addrlen, 1); |
3062 | } |
3063 | |
3064 | int kernel_getsockopt(struct socket *sock, int level, int optname, |
3065 | char *optval, int *optlen) |
3066 | { |
3067 | mm_segment_t oldfs = get_fs(); |
3068 | int err; |
3069 | |
3070 | set_fs(KERNEL_DS); |
3071 | if (level == SOL_SOCKET) |
3072 | err = sock_getsockopt(sock, level, optname, optval, optlen); |
3073 | else |
3074 | err = sock->ops->getsockopt(sock, level, optname, optval, |
3075 | optlen); |
3076 | set_fs(oldfs); |
3077 | return err; |
3078 | } |
3079 | |
3080 | int kernel_setsockopt(struct socket *sock, int level, int optname, |
3081 | char *optval, unsigned int optlen) |
3082 | { |
3083 | mm_segment_t oldfs = get_fs(); |
3084 | int err; |
3085 | |
3086 | set_fs(KERNEL_DS); |
3087 | if (level == SOL_SOCKET) |
3088 | err = sock_setsockopt(sock, level, optname, optval, optlen); |
3089 | else |
3090 | err = sock->ops->setsockopt(sock, level, optname, optval, |
3091 | optlen); |
3092 | set_fs(oldfs); |
3093 | return err; |
3094 | } |
3095 | |
3096 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
3097 | size_t size, int flags) |
3098 | { |
3099 | if (sock->ops->sendpage) |
3100 | return sock->ops->sendpage(sock, page, offset, size, flags); |
3101 | |
3102 | return sock_no_sendpage(sock, page, offset, size, flags); |
3103 | } |
3104 | |
3105 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
3106 | { |
3107 | mm_segment_t oldfs = get_fs(); |
3108 | int err; |
3109 | |
3110 | set_fs(KERNEL_DS); |
3111 | err = sock->ops->ioctl(sock, cmd, arg); |
3112 | set_fs(oldfs); |
3113 | |
3114 | return err; |
3115 | } |
3116 | |
3117 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3118 | { |
3119 | return sock->ops->shutdown(sock, how); |
3120 | } |
3121 | |
3122 | EXPORT_SYMBOL(sock_create); |
3123 | EXPORT_SYMBOL(sock_create_kern); |
3124 | EXPORT_SYMBOL(sock_create_lite); |
3125 | EXPORT_SYMBOL(sock_map_fd); |
3126 | EXPORT_SYMBOL(sock_recvmsg); |
3127 | EXPORT_SYMBOL(sock_register); |
3128 | EXPORT_SYMBOL(sock_release); |
3129 | EXPORT_SYMBOL(sock_sendmsg); |
3130 | EXPORT_SYMBOL(sock_unregister); |
3131 | EXPORT_SYMBOL(sock_wake_async); |
3132 | EXPORT_SYMBOL(sockfd_lookup); |
3133 | EXPORT_SYMBOL(kernel_sendmsg); |
3134 | EXPORT_SYMBOL(kernel_recvmsg); |
3135 | EXPORT_SYMBOL(kernel_bind); |
3136 | EXPORT_SYMBOL(kernel_listen); |
3137 | EXPORT_SYMBOL(kernel_accept); |
3138 | EXPORT_SYMBOL(kernel_connect); |
3139 | EXPORT_SYMBOL(kernel_getsockname); |
3140 | EXPORT_SYMBOL(kernel_getpeername); |
3141 | EXPORT_SYMBOL(kernel_getsockopt); |
3142 | EXPORT_SYMBOL(kernel_setsockopt); |
3143 | EXPORT_SYMBOL(kernel_sendpage); |
3144 | EXPORT_SYMBOL(kernel_sock_ioctl); |
3145 | EXPORT_SYMBOL(kernel_sock_shutdown); |
3146 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
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jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9