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