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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 | 72 | #include <linux/if_bridge.h> |
20380731 ACM |
73 | #include <linux/if_frad.h> |
74 | #include <linux/if_vlan.h> | |
408eccce | 75 | #include <linux/ptp_classify.h> |
1da177e4 LT |
76 | #include <linux/init.h> |
77 | #include <linux/poll.h> | |
78 | #include <linux/cache.h> | |
79 | #include <linux/module.h> | |
80 | #include <linux/highmem.h> | |
1da177e4 LT |
81 | #include <linux/mount.h> |
82 | #include <linux/security.h> | |
83 | #include <linux/syscalls.h> | |
84 | #include <linux/compat.h> | |
85 | #include <linux/kmod.h> | |
3ec3b2fb | 86 | #include <linux/audit.h> |
d86b5e0e | 87 | #include <linux/wireless.h> |
1b8d7ae4 | 88 | #include <linux/nsproxy.h> |
1fd7317d | 89 | #include <linux/magic.h> |
5a0e3ad6 | 90 | #include <linux/slab.h> |
600e1779 | 91 | #include <linux/xattr.h> |
1da177e4 | 92 | |
7c0f6ba6 | 93 | #include <linux/uaccess.h> |
1da177e4 LT |
94 | #include <asm/unistd.h> |
95 | ||
96 | #include <net/compat.h> | |
87de87d5 | 97 | #include <net/wext.h> |
f8451725 | 98 | #include <net/cls_cgroup.h> |
1da177e4 LT |
99 | |
100 | #include <net/sock.h> | |
101 | #include <linux/netfilter.h> | |
102 | ||
6b96018b AB |
103 | #include <linux/if_tun.h> |
104 | #include <linux/ipv6_route.h> | |
105 | #include <linux/route.h> | |
6b96018b AB |
106 | #include <linux/sockios.h> |
107 | #include <linux/atalk.h> | |
076bb0c8 | 108 | #include <net/busy_poll.h> |
f24b9be5 | 109 | #include <linux/errqueue.h> |
06021292 | 110 | |
e0d1095a | 111 | #ifdef CONFIG_NET_RX_BUSY_POLL |
64b0dc51 ET |
112 | unsigned int sysctl_net_busy_read __read_mostly; |
113 | unsigned int sysctl_net_busy_poll __read_mostly; | |
06021292 | 114 | #endif |
6b96018b | 115 | |
8ae5e030 AV |
116 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to); |
117 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from); | |
89bddce5 | 118 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
119 | |
120 | static int sock_close(struct inode *inode, struct file *file); | |
121 | static unsigned int sock_poll(struct file *file, | |
122 | struct poll_table_struct *wait); | |
89bddce5 | 123 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
124 | #ifdef CONFIG_COMPAT |
125 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 126 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 127 | #endif |
1da177e4 | 128 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
129 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
130 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 131 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 132 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 133 | unsigned int flags); |
1da177e4 | 134 | |
1da177e4 LT |
135 | /* |
136 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
137 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
138 | */ | |
139 | ||
da7071d7 | 140 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
141 | .owner = THIS_MODULE, |
142 | .llseek = no_llseek, | |
8ae5e030 AV |
143 | .read_iter = sock_read_iter, |
144 | .write_iter = sock_write_iter, | |
1da177e4 LT |
145 | .poll = sock_poll, |
146 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
147 | #ifdef CONFIG_COMPAT |
148 | .compat_ioctl = compat_sock_ioctl, | |
149 | #endif | |
1da177e4 | 150 | .mmap = sock_mmap, |
1da177e4 LT |
151 | .release = sock_close, |
152 | .fasync = sock_fasync, | |
5274f052 JA |
153 | .sendpage = sock_sendpage, |
154 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 155 | .splice_read = sock_splice_read, |
1da177e4 LT |
156 | }; |
157 | ||
158 | /* | |
159 | * The protocol list. Each protocol is registered in here. | |
160 | */ | |
161 | ||
1da177e4 | 162 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 163 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 164 | |
1da177e4 LT |
165 | /* |
166 | * Statistics counters of the socket lists | |
167 | */ | |
168 | ||
c6d409cf | 169 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
170 | |
171 | /* | |
89bddce5 SH |
172 | * Support routines. |
173 | * Move socket addresses back and forth across the kernel/user | |
174 | * divide and look after the messy bits. | |
1da177e4 LT |
175 | */ |
176 | ||
1da177e4 LT |
177 | /** |
178 | * move_addr_to_kernel - copy a socket address into kernel space | |
179 | * @uaddr: Address in user space | |
180 | * @kaddr: Address in kernel space | |
181 | * @ulen: Length in user space | |
182 | * | |
183 | * The address is copied into kernel space. If the provided address is | |
184 | * too long an error code of -EINVAL is returned. If the copy gives | |
185 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
186 | */ | |
187 | ||
43db362d | 188 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 189 | { |
230b1839 | 190 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 191 | return -EINVAL; |
89bddce5 | 192 | if (ulen == 0) |
1da177e4 | 193 | return 0; |
89bddce5 | 194 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 195 | return -EFAULT; |
3ec3b2fb | 196 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
197 | } |
198 | ||
199 | /** | |
200 | * move_addr_to_user - copy an address to user space | |
201 | * @kaddr: kernel space address | |
202 | * @klen: length of address in kernel | |
203 | * @uaddr: user space address | |
204 | * @ulen: pointer to user length field | |
205 | * | |
206 | * The value pointed to by ulen on entry is the buffer length available. | |
207 | * This is overwritten with the buffer space used. -EINVAL is returned | |
208 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
209 | * is returned if either the buffer or the length field are not | |
210 | * accessible. | |
211 | * After copying the data up to the limit the user specifies, the true | |
212 | * length of the data is written over the length limit the user | |
213 | * specified. Zero is returned for a success. | |
214 | */ | |
89bddce5 | 215 | |
43db362d | 216 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 217 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
218 | { |
219 | int err; | |
220 | int len; | |
221 | ||
68c6beb3 | 222 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
89bddce5 SH |
223 | err = get_user(len, ulen); |
224 | if (err) | |
1da177e4 | 225 | return err; |
89bddce5 SH |
226 | if (len > klen) |
227 | len = klen; | |
68c6beb3 | 228 | if (len < 0) |
1da177e4 | 229 | return -EINVAL; |
89bddce5 | 230 | if (len) { |
d6fe3945 SG |
231 | if (audit_sockaddr(klen, kaddr)) |
232 | return -ENOMEM; | |
89bddce5 | 233 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
234 | return -EFAULT; |
235 | } | |
236 | /* | |
89bddce5 SH |
237 | * "fromlen shall refer to the value before truncation.." |
238 | * 1003.1g | |
1da177e4 LT |
239 | */ |
240 | return __put_user(klen, ulen); | |
241 | } | |
242 | ||
e18b890b | 243 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
244 | |
245 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
246 | { | |
247 | struct socket_alloc *ei; | |
eaefd110 | 248 | struct socket_wq *wq; |
89bddce5 | 249 | |
e94b1766 | 250 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
251 | if (!ei) |
252 | return NULL; | |
eaefd110 ED |
253 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
254 | if (!wq) { | |
43815482 ED |
255 | kmem_cache_free(sock_inode_cachep, ei); |
256 | return NULL; | |
257 | } | |
eaefd110 ED |
258 | init_waitqueue_head(&wq->wait); |
259 | wq->fasync_list = NULL; | |
574aab1e | 260 | wq->flags = 0; |
eaefd110 | 261 | RCU_INIT_POINTER(ei->socket.wq, wq); |
89bddce5 | 262 | |
1da177e4 LT |
263 | ei->socket.state = SS_UNCONNECTED; |
264 | ei->socket.flags = 0; | |
265 | ei->socket.ops = NULL; | |
266 | ei->socket.sk = NULL; | |
267 | ei->socket.file = NULL; | |
1da177e4 LT |
268 | |
269 | return &ei->vfs_inode; | |
270 | } | |
271 | ||
272 | static void sock_destroy_inode(struct inode *inode) | |
273 | { | |
43815482 | 274 | struct socket_alloc *ei; |
eaefd110 | 275 | struct socket_wq *wq; |
43815482 ED |
276 | |
277 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 278 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 279 | kfree_rcu(wq, rcu); |
43815482 | 280 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
281 | } |
282 | ||
51cc5068 | 283 | static void init_once(void *foo) |
1da177e4 | 284 | { |
89bddce5 | 285 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 286 | |
a35afb83 | 287 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 288 | } |
89bddce5 | 289 | |
1e911632 | 290 | static void init_inodecache(void) |
1da177e4 LT |
291 | { |
292 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
293 | sizeof(struct socket_alloc), |
294 | 0, | |
295 | (SLAB_HWCACHE_ALIGN | | |
296 | SLAB_RECLAIM_ACCOUNT | | |
5d097056 | 297 | SLAB_MEM_SPREAD | SLAB_ACCOUNT), |
20c2df83 | 298 | init_once); |
1e911632 | 299 | BUG_ON(sock_inode_cachep == NULL); |
1da177e4 LT |
300 | } |
301 | ||
b87221de | 302 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
303 | .alloc_inode = sock_alloc_inode, |
304 | .destroy_inode = sock_destroy_inode, | |
305 | .statfs = simple_statfs, | |
1da177e4 LT |
306 | }; |
307 | ||
c23fbb6b ED |
308 | /* |
309 | * sockfs_dname() is called from d_path(). | |
310 | */ | |
311 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
312 | { | |
313 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
c5ef6035 | 314 | d_inode(dentry)->i_ino); |
c23fbb6b ED |
315 | } |
316 | ||
3ba13d17 | 317 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 318 | .d_dname = sockfs_dname, |
1da177e4 LT |
319 | }; |
320 | ||
bba0bd31 AG |
321 | static int sockfs_xattr_get(const struct xattr_handler *handler, |
322 | struct dentry *dentry, struct inode *inode, | |
323 | const char *suffix, void *value, size_t size) | |
324 | { | |
325 | if (value) { | |
326 | if (dentry->d_name.len + 1 > size) | |
327 | return -ERANGE; | |
328 | memcpy(value, dentry->d_name.name, dentry->d_name.len + 1); | |
329 | } | |
330 | return dentry->d_name.len + 1; | |
331 | } | |
332 | ||
333 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" | |
334 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
335 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
336 | ||
337 | static const struct xattr_handler sockfs_xattr_handler = { | |
338 | .name = XATTR_NAME_SOCKPROTONAME, | |
339 | .get = sockfs_xattr_get, | |
340 | }; | |
341 | ||
4a590153 AG |
342 | static int sockfs_security_xattr_set(const struct xattr_handler *handler, |
343 | struct dentry *dentry, struct inode *inode, | |
344 | const char *suffix, const void *value, | |
345 | size_t size, int flags) | |
346 | { | |
347 | /* Handled by LSM. */ | |
348 | return -EAGAIN; | |
349 | } | |
350 | ||
351 | static const struct xattr_handler sockfs_security_xattr_handler = { | |
352 | .prefix = XATTR_SECURITY_PREFIX, | |
353 | .set = sockfs_security_xattr_set, | |
354 | }; | |
355 | ||
bba0bd31 AG |
356 | static const struct xattr_handler *sockfs_xattr_handlers[] = { |
357 | &sockfs_xattr_handler, | |
4a590153 | 358 | &sockfs_security_xattr_handler, |
bba0bd31 AG |
359 | NULL |
360 | }; | |
361 | ||
c74a1cbb AV |
362 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
363 | int flags, const char *dev_name, void *data) | |
364 | { | |
bba0bd31 AG |
365 | return mount_pseudo_xattr(fs_type, "socket:", &sockfs_ops, |
366 | sockfs_xattr_handlers, | |
367 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
c74a1cbb AV |
368 | } |
369 | ||
370 | static struct vfsmount *sock_mnt __read_mostly; | |
371 | ||
372 | static struct file_system_type sock_fs_type = { | |
373 | .name = "sockfs", | |
374 | .mount = sockfs_mount, | |
375 | .kill_sb = kill_anon_super, | |
376 | }; | |
377 | ||
1da177e4 LT |
378 | /* |
379 | * Obtains the first available file descriptor and sets it up for use. | |
380 | * | |
39d8c1b6 DM |
381 | * These functions create file structures and maps them to fd space |
382 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
383 | * and file struct implicitly stored in sock->file. |
384 | * Note that another thread may close file descriptor before we return | |
385 | * from this function. We use the fact that now we do not refer | |
386 | * to socket after mapping. If one day we will need it, this | |
387 | * function will increment ref. count on file by 1. | |
388 | * | |
389 | * In any case returned fd MAY BE not valid! | |
390 | * This race condition is unavoidable | |
391 | * with shared fd spaces, we cannot solve it inside kernel, | |
392 | * but we take care of internal coherence yet. | |
393 | */ | |
394 | ||
aab174f0 | 395 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 396 | { |
7cbe66b6 | 397 | struct qstr name = { .name = "" }; |
2c48b9c4 | 398 | struct path path; |
7cbe66b6 | 399 | struct file *file; |
1da177e4 | 400 | |
600e1779 MY |
401 | if (dname) { |
402 | name.name = dname; | |
403 | name.len = strlen(name.name); | |
404 | } else if (sock->sk) { | |
405 | name.name = sock->sk->sk_prot_creator->name; | |
406 | name.len = strlen(name.name); | |
407 | } | |
4b936885 | 408 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
28407630 AV |
409 | if (unlikely(!path.dentry)) |
410 | return ERR_PTR(-ENOMEM); | |
2c48b9c4 | 411 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 412 | |
2c48b9c4 | 413 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
39d8c1b6 | 414 | |
2c48b9c4 | 415 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 416 | &socket_file_ops); |
b5ffe634 | 417 | if (IS_ERR(file)) { |
cc3808f8 | 418 | /* drop dentry, keep inode */ |
c5ef6035 | 419 | ihold(d_inode(path.dentry)); |
2c48b9c4 | 420 | path_put(&path); |
39b65252 | 421 | return file; |
cc3808f8 AV |
422 | } |
423 | ||
424 | sock->file = file; | |
77d27200 | 425 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 426 | file->private_data = sock; |
28407630 | 427 | return file; |
39d8c1b6 | 428 | } |
56b31d1c | 429 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 430 | |
56b31d1c | 431 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
432 | { |
433 | struct file *newfile; | |
28407630 AV |
434 | int fd = get_unused_fd_flags(flags); |
435 | if (unlikely(fd < 0)) | |
436 | return fd; | |
39d8c1b6 | 437 | |
aab174f0 | 438 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 439 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 440 | fd_install(fd, newfile); |
28407630 AV |
441 | return fd; |
442 | } | |
7cbe66b6 | 443 | |
28407630 AV |
444 | put_unused_fd(fd); |
445 | return PTR_ERR(newfile); | |
1da177e4 LT |
446 | } |
447 | ||
406a3c63 | 448 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 449 | { |
6cb153ca BL |
450 | if (file->f_op == &socket_file_ops) |
451 | return file->private_data; /* set in sock_map_fd */ | |
452 | ||
23bb80d2 ED |
453 | *err = -ENOTSOCK; |
454 | return NULL; | |
6cb153ca | 455 | } |
406a3c63 | 456 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 457 | |
1da177e4 | 458 | /** |
c6d409cf | 459 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
460 | * @fd: file handle |
461 | * @err: pointer to an error code return | |
462 | * | |
463 | * The file handle passed in is locked and the socket it is bound | |
241c4667 | 464 | * to is returned. If an error occurs the err pointer is overwritten |
1da177e4 LT |
465 | * with a negative errno code and NULL is returned. The function checks |
466 | * for both invalid handles and passing a handle which is not a socket. | |
467 | * | |
468 | * On a success the socket object pointer is returned. | |
469 | */ | |
470 | ||
471 | struct socket *sockfd_lookup(int fd, int *err) | |
472 | { | |
473 | struct file *file; | |
1da177e4 LT |
474 | struct socket *sock; |
475 | ||
89bddce5 SH |
476 | file = fget(fd); |
477 | if (!file) { | |
1da177e4 LT |
478 | *err = -EBADF; |
479 | return NULL; | |
480 | } | |
89bddce5 | 481 | |
6cb153ca BL |
482 | sock = sock_from_file(file, err); |
483 | if (!sock) | |
1da177e4 | 484 | fput(file); |
6cb153ca BL |
485 | return sock; |
486 | } | |
c6d409cf | 487 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 488 | |
6cb153ca BL |
489 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
490 | { | |
00e188ef | 491 | struct fd f = fdget(fd); |
6cb153ca BL |
492 | struct socket *sock; |
493 | ||
3672558c | 494 | *err = -EBADF; |
00e188ef AV |
495 | if (f.file) { |
496 | sock = sock_from_file(f.file, err); | |
497 | if (likely(sock)) { | |
498 | *fput_needed = f.flags; | |
6cb153ca | 499 | return sock; |
00e188ef AV |
500 | } |
501 | fdput(f); | |
1da177e4 | 502 | } |
6cb153ca | 503 | return NULL; |
1da177e4 LT |
504 | } |
505 | ||
600e1779 MY |
506 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, |
507 | size_t size) | |
508 | { | |
509 | ssize_t len; | |
510 | ssize_t used = 0; | |
511 | ||
c5ef6035 | 512 | len = security_inode_listsecurity(d_inode(dentry), buffer, size); |
600e1779 MY |
513 | if (len < 0) |
514 | return len; | |
515 | used += len; | |
516 | if (buffer) { | |
517 | if (size < used) | |
518 | return -ERANGE; | |
519 | buffer += len; | |
520 | } | |
521 | ||
522 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
523 | used += len; | |
524 | if (buffer) { | |
525 | if (size < used) | |
526 | return -ERANGE; | |
527 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
528 | buffer += len; | |
529 | } | |
530 | ||
531 | return used; | |
532 | } | |
533 | ||
dc647ec8 | 534 | static int sockfs_setattr(struct dentry *dentry, struct iattr *iattr) |
86741ec2 LC |
535 | { |
536 | int err = simple_setattr(dentry, iattr); | |
537 | ||
e1a3a60a | 538 | if (!err && (iattr->ia_valid & ATTR_UID)) { |
86741ec2 LC |
539 | struct socket *sock = SOCKET_I(d_inode(dentry)); |
540 | ||
541 | sock->sk->sk_uid = iattr->ia_uid; | |
542 | } | |
543 | ||
544 | return err; | |
545 | } | |
546 | ||
600e1779 | 547 | static const struct inode_operations sockfs_inode_ops = { |
600e1779 | 548 | .listxattr = sockfs_listxattr, |
86741ec2 | 549 | .setattr = sockfs_setattr, |
600e1779 MY |
550 | }; |
551 | ||
1da177e4 LT |
552 | /** |
553 | * sock_alloc - allocate a socket | |
89bddce5 | 554 | * |
1da177e4 LT |
555 | * Allocate a new inode and socket object. The two are bound together |
556 | * and initialised. The socket is then returned. If we are out of inodes | |
557 | * NULL is returned. | |
558 | */ | |
559 | ||
f4a00aac | 560 | struct socket *sock_alloc(void) |
1da177e4 | 561 | { |
89bddce5 SH |
562 | struct inode *inode; |
563 | struct socket *sock; | |
1da177e4 | 564 | |
a209dfc7 | 565 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
566 | if (!inode) |
567 | return NULL; | |
568 | ||
569 | sock = SOCKET_I(inode); | |
570 | ||
29a020d3 | 571 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 572 | inode->i_ino = get_next_ino(); |
89bddce5 | 573 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
574 | inode->i_uid = current_fsuid(); |
575 | inode->i_gid = current_fsgid(); | |
600e1779 | 576 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 577 | |
19e8d69c | 578 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
579 | return sock; |
580 | } | |
f4a00aac | 581 | EXPORT_SYMBOL(sock_alloc); |
1da177e4 | 582 | |
1da177e4 LT |
583 | /** |
584 | * sock_release - close a socket | |
585 | * @sock: socket to close | |
586 | * | |
587 | * The socket is released from the protocol stack if it has a release | |
588 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 589 | * an inode not a file. |
1da177e4 | 590 | */ |
89bddce5 | 591 | |
1da177e4 LT |
592 | void sock_release(struct socket *sock) |
593 | { | |
594 | if (sock->ops) { | |
595 | struct module *owner = sock->ops->owner; | |
596 | ||
597 | sock->ops->release(sock); | |
598 | sock->ops = NULL; | |
599 | module_put(owner); | |
600 | } | |
601 | ||
eaefd110 | 602 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
3410f22e | 603 | pr_err("%s: fasync list not empty!\n", __func__); |
1da177e4 | 604 | |
19e8d69c | 605 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
606 | if (!sock->file) { |
607 | iput(SOCK_INODE(sock)); | |
608 | return; | |
609 | } | |
89bddce5 | 610 | sock->file = NULL; |
1da177e4 | 611 | } |
c6d409cf | 612 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 613 | |
c14ac945 | 614 | void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags) |
20d49473 | 615 | { |
140c55d4 ED |
616 | u8 flags = *tx_flags; |
617 | ||
c14ac945 | 618 | if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
140c55d4 ED |
619 | flags |= SKBTX_HW_TSTAMP; |
620 | ||
c14ac945 | 621 | if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
140c55d4 ED |
622 | flags |= SKBTX_SW_TSTAMP; |
623 | ||
c14ac945 | 624 | if (tsflags & SOF_TIMESTAMPING_TX_SCHED) |
140c55d4 ED |
625 | flags |= SKBTX_SCHED_TSTAMP; |
626 | ||
140c55d4 | 627 | *tx_flags = flags; |
20d49473 | 628 | } |
67cc0d40 | 629 | EXPORT_SYMBOL(__sock_tx_timestamp); |
20d49473 | 630 | |
d8725c86 | 631 | static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg) |
1da177e4 | 632 | { |
01e97e65 | 633 | int ret = sock->ops->sendmsg(sock, msg, msg_data_left(msg)); |
d8725c86 AV |
634 | BUG_ON(ret == -EIOCBQUEUED); |
635 | return ret; | |
1da177e4 LT |
636 | } |
637 | ||
d8725c86 | 638 | int sock_sendmsg(struct socket *sock, struct msghdr *msg) |
228e548e | 639 | { |
d8725c86 | 640 | int err = security_socket_sendmsg(sock, msg, |
01e97e65 | 641 | msg_data_left(msg)); |
228e548e | 642 | |
d8725c86 | 643 | return err ?: sock_sendmsg_nosec(sock, msg); |
0cf00c6f | 644 | } |
c6d409cf | 645 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 LT |
646 | |
647 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
648 | struct kvec *vec, size_t num, size_t size) | |
649 | { | |
6aa24814 | 650 | iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size); |
d8725c86 | 651 | return sock_sendmsg(sock, msg); |
1da177e4 | 652 | } |
c6d409cf | 653 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 654 | |
306b13eb TH |
655 | int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg, |
656 | struct kvec *vec, size_t num, size_t size) | |
657 | { | |
658 | struct socket *sock = sk->sk_socket; | |
659 | ||
660 | if (!sock->ops->sendmsg_locked) | |
661 | sock_no_sendmsg_locked(sk, msg, size); | |
662 | ||
663 | iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size); | |
664 | ||
665 | return sock->ops->sendmsg_locked(sk, msg, msg_data_left(msg)); | |
666 | } | |
667 | EXPORT_SYMBOL(kernel_sendmsg_locked); | |
668 | ||
8605330a SHY |
669 | static bool skb_is_err_queue(const struct sk_buff *skb) |
670 | { | |
671 | /* pkt_type of skbs enqueued on the error queue are set to | |
672 | * PACKET_OUTGOING in skb_set_err_queue(). This is only safe to do | |
673 | * in recvmsg, since skbs received on a local socket will never | |
674 | * have a pkt_type of PACKET_OUTGOING. | |
675 | */ | |
676 | return skb->pkt_type == PACKET_OUTGOING; | |
677 | } | |
678 | ||
b50a5c70 ML |
679 | /* On transmit, software and hardware timestamps are returned independently. |
680 | * As the two skb clones share the hardware timestamp, which may be updated | |
681 | * before the software timestamp is received, a hardware TX timestamp may be | |
682 | * returned only if there is no software TX timestamp. Ignore false software | |
683 | * timestamps, which may be made in the __sock_recv_timestamp() call when the | |
684 | * option SO_TIMESTAMP(NS) is enabled on the socket, even when the skb has a | |
685 | * hardware timestamp. | |
686 | */ | |
687 | static bool skb_is_swtx_tstamp(const struct sk_buff *skb, int false_tstamp) | |
688 | { | |
689 | return skb->tstamp && !false_tstamp && skb_is_err_queue(skb); | |
690 | } | |
691 | ||
aad9c8c4 ML |
692 | static void put_ts_pktinfo(struct msghdr *msg, struct sk_buff *skb) |
693 | { | |
694 | struct scm_ts_pktinfo ts_pktinfo; | |
695 | struct net_device *orig_dev; | |
696 | ||
697 | if (!skb_mac_header_was_set(skb)) | |
698 | return; | |
699 | ||
700 | memset(&ts_pktinfo, 0, sizeof(ts_pktinfo)); | |
701 | ||
702 | rcu_read_lock(); | |
703 | orig_dev = dev_get_by_napi_id(skb_napi_id(skb)); | |
704 | if (orig_dev) | |
705 | ts_pktinfo.if_index = orig_dev->ifindex; | |
706 | rcu_read_unlock(); | |
707 | ||
708 | ts_pktinfo.pkt_length = skb->len - skb_mac_offset(skb); | |
709 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_PKTINFO, | |
710 | sizeof(ts_pktinfo), &ts_pktinfo); | |
711 | } | |
712 | ||
92f37fd2 ED |
713 | /* |
714 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
715 | */ | |
716 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
717 | struct sk_buff *skb) | |
718 | { | |
20d49473 | 719 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
f24b9be5 | 720 | struct scm_timestamping tss; |
b50a5c70 | 721 | int empty = 1, false_tstamp = 0; |
20d49473 PO |
722 | struct skb_shared_hwtstamps *shhwtstamps = |
723 | skb_hwtstamps(skb); | |
724 | ||
725 | /* Race occurred between timestamp enabling and packet | |
726 | receiving. Fill in the current time for now. */ | |
b50a5c70 | 727 | if (need_software_tstamp && skb->tstamp == 0) { |
20d49473 | 728 | __net_timestamp(skb); |
b50a5c70 ML |
729 | false_tstamp = 1; |
730 | } | |
20d49473 PO |
731 | |
732 | if (need_software_tstamp) { | |
733 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
734 | struct timeval tv; | |
735 | skb_get_timestamp(skb, &tv); | |
736 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
737 | sizeof(tv), &tv); | |
738 | } else { | |
f24b9be5 WB |
739 | struct timespec ts; |
740 | skb_get_timestampns(skb, &ts); | |
20d49473 | 741 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
f24b9be5 | 742 | sizeof(ts), &ts); |
20d49473 PO |
743 | } |
744 | } | |
745 | ||
f24b9be5 | 746 | memset(&tss, 0, sizeof(tss)); |
c199105d | 747 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
f24b9be5 | 748 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
20d49473 | 749 | empty = 0; |
4d276eb6 | 750 | if (shhwtstamps && |
b9f40e21 | 751 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
b50a5c70 | 752 | !skb_is_swtx_tstamp(skb, false_tstamp) && |
aad9c8c4 | 753 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) { |
4d276eb6 | 754 | empty = 0; |
aad9c8c4 ML |
755 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_OPT_PKTINFO) && |
756 | !skb_is_err_queue(skb)) | |
757 | put_ts_pktinfo(msg, skb); | |
758 | } | |
1c885808 | 759 | if (!empty) { |
20d49473 | 760 | put_cmsg(msg, SOL_SOCKET, |
f24b9be5 | 761 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
1c885808 | 762 | |
8605330a | 763 | if (skb_is_err_queue(skb) && skb->len && |
4ef1b286 | 764 | SKB_EXT_ERR(skb)->opt_stats) |
1c885808 FY |
765 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_OPT_STATS, |
766 | skb->len, skb->data); | |
767 | } | |
92f37fd2 | 768 | } |
7c81fd8b ACM |
769 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
770 | ||
6e3e939f JB |
771 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
772 | struct sk_buff *skb) | |
773 | { | |
774 | int ack; | |
775 | ||
776 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
777 | return; | |
778 | if (!skb->wifi_acked_valid) | |
779 | return; | |
780 | ||
781 | ack = skb->wifi_acked; | |
782 | ||
783 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
784 | } | |
785 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
786 | ||
11165f14 | 787 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
788 | struct sk_buff *skb) | |
3b885787 | 789 | { |
744d5a3e | 790 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount) |
3b885787 | 791 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
744d5a3e | 792 | sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
3b885787 NH |
793 | } |
794 | ||
767dd033 | 795 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
796 | struct sk_buff *skb) |
797 | { | |
798 | sock_recv_timestamp(msg, sk, skb); | |
799 | sock_recv_drops(msg, sk, skb); | |
800 | } | |
767dd033 | 801 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 802 | |
1b784140 | 803 | static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
2da62906 | 804 | int flags) |
1da177e4 | 805 | { |
2da62906 | 806 | return sock->ops->recvmsg(sock, msg, msg_data_left(msg), flags); |
1da177e4 LT |
807 | } |
808 | ||
2da62906 | 809 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags) |
a2e27255 | 810 | { |
2da62906 | 811 | int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags); |
a2e27255 | 812 | |
2da62906 | 813 | return err ?: sock_recvmsg_nosec(sock, msg, flags); |
1da177e4 | 814 | } |
c6d409cf | 815 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 816 | |
c1249c0a ML |
817 | /** |
818 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
819 | * @sock: The socket to receive the message from | |
820 | * @msg: Received message | |
821 | * @vec: Input s/g array for message data | |
822 | * @num: Size of input s/g array | |
823 | * @size: Number of bytes to read | |
824 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
825 | * | |
826 | * On return the msg structure contains the scatter/gather array passed in the | |
827 | * vec argument. The array is modified so that it consists of the unfilled | |
828 | * portion of the original array. | |
829 | * | |
830 | * The returned value is the total number of bytes received, or an error. | |
831 | */ | |
89bddce5 SH |
832 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
833 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
834 | { |
835 | mm_segment_t oldfs = get_fs(); | |
836 | int result; | |
837 | ||
6aa24814 | 838 | iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size); |
1da177e4 | 839 | set_fs(KERNEL_DS); |
2da62906 | 840 | result = sock_recvmsg(sock, msg, flags); |
1da177e4 LT |
841 | set_fs(oldfs); |
842 | return result; | |
843 | } | |
c6d409cf | 844 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 | 845 | |
ce1d4d3e CH |
846 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
847 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 848 | { |
1da177e4 LT |
849 | struct socket *sock; |
850 | int flags; | |
851 | ||
ce1d4d3e CH |
852 | sock = file->private_data; |
853 | ||
35f9c09f ED |
854 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
855 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
856 | flags |= more; | |
ce1d4d3e | 857 | |
e6949583 | 858 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 859 | } |
1da177e4 | 860 | |
9c55e01c | 861 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 862 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
863 | unsigned int flags) |
864 | { | |
865 | struct socket *sock = file->private_data; | |
866 | ||
997b37da RDC |
867 | if (unlikely(!sock->ops->splice_read)) |
868 | return -EINVAL; | |
869 | ||
9c55e01c JA |
870 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
871 | } | |
872 | ||
8ae5e030 | 873 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to) |
ce1d4d3e | 874 | { |
6d652330 AV |
875 | struct file *file = iocb->ki_filp; |
876 | struct socket *sock = file->private_data; | |
0345f931 | 877 | struct msghdr msg = {.msg_iter = *to, |
878 | .msg_iocb = iocb}; | |
8ae5e030 | 879 | ssize_t res; |
ce1d4d3e | 880 | |
8ae5e030 AV |
881 | if (file->f_flags & O_NONBLOCK) |
882 | msg.msg_flags = MSG_DONTWAIT; | |
883 | ||
884 | if (iocb->ki_pos != 0) | |
1da177e4 | 885 | return -ESPIPE; |
027445c3 | 886 | |
66ee59af | 887 | if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
1da177e4 LT |
888 | return 0; |
889 | ||
2da62906 | 890 | res = sock_recvmsg(sock, &msg, msg.msg_flags); |
8ae5e030 AV |
891 | *to = msg.msg_iter; |
892 | return res; | |
1da177e4 LT |
893 | } |
894 | ||
8ae5e030 | 895 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) |
ce1d4d3e | 896 | { |
6d652330 AV |
897 | struct file *file = iocb->ki_filp; |
898 | struct socket *sock = file->private_data; | |
0345f931 | 899 | struct msghdr msg = {.msg_iter = *from, |
900 | .msg_iocb = iocb}; | |
8ae5e030 | 901 | ssize_t res; |
1da177e4 | 902 | |
8ae5e030 | 903 | if (iocb->ki_pos != 0) |
ce1d4d3e | 904 | return -ESPIPE; |
027445c3 | 905 | |
8ae5e030 AV |
906 | if (file->f_flags & O_NONBLOCK) |
907 | msg.msg_flags = MSG_DONTWAIT; | |
908 | ||
6d652330 AV |
909 | if (sock->type == SOCK_SEQPACKET) |
910 | msg.msg_flags |= MSG_EOR; | |
911 | ||
d8725c86 | 912 | res = sock_sendmsg(sock, &msg); |
8ae5e030 AV |
913 | *from = msg.msg_iter; |
914 | return res; | |
1da177e4 LT |
915 | } |
916 | ||
1da177e4 LT |
917 | /* |
918 | * Atomic setting of ioctl hooks to avoid race | |
919 | * with module unload. | |
920 | */ | |
921 | ||
4a3e2f71 | 922 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 923 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 924 | |
881d966b | 925 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 926 | { |
4a3e2f71 | 927 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 928 | br_ioctl_hook = hook; |
4a3e2f71 | 929 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
930 | } |
931 | EXPORT_SYMBOL(brioctl_set); | |
932 | ||
4a3e2f71 | 933 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 934 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 935 | |
881d966b | 936 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 937 | { |
4a3e2f71 | 938 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 939 | vlan_ioctl_hook = hook; |
4a3e2f71 | 940 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
941 | } |
942 | EXPORT_SYMBOL(vlan_ioctl_set); | |
943 | ||
4a3e2f71 | 944 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 945 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 946 | |
89bddce5 | 947 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 948 | { |
4a3e2f71 | 949 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 950 | dlci_ioctl_hook = hook; |
4a3e2f71 | 951 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
952 | } |
953 | EXPORT_SYMBOL(dlci_ioctl_set); | |
954 | ||
6b96018b AB |
955 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
956 | unsigned int cmd, unsigned long arg) | |
957 | { | |
958 | int err; | |
959 | void __user *argp = (void __user *)arg; | |
960 | ||
961 | err = sock->ops->ioctl(sock, cmd, arg); | |
962 | ||
963 | /* | |
964 | * If this ioctl is unknown try to hand it down | |
965 | * to the NIC driver. | |
966 | */ | |
967 | if (err == -ENOIOCTLCMD) | |
968 | err = dev_ioctl(net, cmd, argp); | |
969 | ||
970 | return err; | |
971 | } | |
972 | ||
1da177e4 LT |
973 | /* |
974 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
975 | * what to do with it - that's up to the protocol still. | |
976 | */ | |
977 | ||
c62cce2c AV |
978 | static struct ns_common *get_net_ns(struct ns_common *ns) |
979 | { | |
980 | return &get_net(container_of(ns, struct net, ns))->ns; | |
981 | } | |
982 | ||
1da177e4 LT |
983 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
984 | { | |
985 | struct socket *sock; | |
881d966b | 986 | struct sock *sk; |
1da177e4 LT |
987 | void __user *argp = (void __user *)arg; |
988 | int pid, err; | |
881d966b | 989 | struct net *net; |
1da177e4 | 990 | |
b69aee04 | 991 | sock = file->private_data; |
881d966b | 992 | sk = sock->sk; |
3b1e0a65 | 993 | net = sock_net(sk); |
1da177e4 | 994 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 995 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 996 | } else |
3d23e349 | 997 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 998 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 999 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1000 | } else |
3d23e349 | 1001 | #endif |
89bddce5 | 1002 | switch (cmd) { |
1da177e4 LT |
1003 | case FIOSETOWN: |
1004 | case SIOCSPGRP: | |
1005 | err = -EFAULT; | |
1006 | if (get_user(pid, (int __user *)argp)) | |
1007 | break; | |
393cc3f5 | 1008 | err = f_setown(sock->file, pid, 1); |
1da177e4 LT |
1009 | break; |
1010 | case FIOGETOWN: | |
1011 | case SIOCGPGRP: | |
609d7fa9 | 1012 | err = put_user(f_getown(sock->file), |
89bddce5 | 1013 | (int __user *)argp); |
1da177e4 LT |
1014 | break; |
1015 | case SIOCGIFBR: | |
1016 | case SIOCSIFBR: | |
1017 | case SIOCBRADDBR: | |
1018 | case SIOCBRDELBR: | |
1019 | err = -ENOPKG; | |
1020 | if (!br_ioctl_hook) | |
1021 | request_module("bridge"); | |
1022 | ||
4a3e2f71 | 1023 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1024 | if (br_ioctl_hook) |
881d966b | 1025 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1026 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1027 | break; |
1028 | case SIOCGIFVLAN: | |
1029 | case SIOCSIFVLAN: | |
1030 | err = -ENOPKG; | |
1031 | if (!vlan_ioctl_hook) | |
1032 | request_module("8021q"); | |
1033 | ||
4a3e2f71 | 1034 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1035 | if (vlan_ioctl_hook) |
881d966b | 1036 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1037 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1038 | break; |
1da177e4 LT |
1039 | case SIOCADDDLCI: |
1040 | case SIOCDELDLCI: | |
1041 | err = -ENOPKG; | |
1042 | if (!dlci_ioctl_hook) | |
1043 | request_module("dlci"); | |
1044 | ||
7512cbf6 PE |
1045 | mutex_lock(&dlci_ioctl_mutex); |
1046 | if (dlci_ioctl_hook) | |
1da177e4 | 1047 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1048 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 | 1049 | break; |
c62cce2c AV |
1050 | case SIOCGSKNS: |
1051 | err = -EPERM; | |
1052 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1053 | break; | |
1054 | ||
1055 | err = open_related_ns(&net->ns, get_net_ns); | |
1056 | break; | |
1da177e4 | 1057 | default: |
6b96018b | 1058 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1059 | break; |
89bddce5 | 1060 | } |
1da177e4 LT |
1061 | return err; |
1062 | } | |
1063 | ||
1064 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1065 | { | |
1066 | int err; | |
1067 | struct socket *sock = NULL; | |
89bddce5 | 1068 | |
1da177e4 LT |
1069 | err = security_socket_create(family, type, protocol, 1); |
1070 | if (err) | |
1071 | goto out; | |
1072 | ||
1073 | sock = sock_alloc(); | |
1074 | if (!sock) { | |
1075 | err = -ENOMEM; | |
1076 | goto out; | |
1077 | } | |
1078 | ||
1da177e4 | 1079 | sock->type = type; |
7420ed23 VY |
1080 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1081 | if (err) | |
1082 | goto out_release; | |
1083 | ||
1da177e4 LT |
1084 | out: |
1085 | *res = sock; | |
1086 | return err; | |
7420ed23 VY |
1087 | out_release: |
1088 | sock_release(sock); | |
1089 | sock = NULL; | |
1090 | goto out; | |
1da177e4 | 1091 | } |
c6d409cf | 1092 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1093 | |
1094 | /* No kernel lock held - perfect */ | |
89bddce5 | 1095 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 | 1096 | { |
cbf55001 | 1097 | unsigned int busy_flag = 0; |
1da177e4 LT |
1098 | struct socket *sock; |
1099 | ||
1100 | /* | |
89bddce5 | 1101 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1102 | */ |
b69aee04 | 1103 | sock = file->private_data; |
2d48d67f | 1104 | |
cbf55001 | 1105 | if (sk_can_busy_loop(sock->sk)) { |
2d48d67f | 1106 | /* this socket can poll_ll so tell the system call */ |
cbf55001 | 1107 | busy_flag = POLL_BUSY_LOOP; |
2d48d67f ET |
1108 | |
1109 | /* once, only if requested by syscall */ | |
cbf55001 ET |
1110 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
1111 | sk_busy_loop(sock->sk, 1); | |
2d48d67f ET |
1112 | } |
1113 | ||
cbf55001 | 1114 | return busy_flag | sock->ops->poll(file, sock, wait); |
1da177e4 LT |
1115 | } |
1116 | ||
89bddce5 | 1117 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1118 | { |
b69aee04 | 1119 | struct socket *sock = file->private_data; |
1da177e4 LT |
1120 | |
1121 | return sock->ops->mmap(file, sock, vma); | |
1122 | } | |
1123 | ||
20380731 | 1124 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1125 | { |
1da177e4 LT |
1126 | sock_release(SOCKET_I(inode)); |
1127 | return 0; | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * Update the socket async list | |
1132 | * | |
1133 | * Fasync_list locking strategy. | |
1134 | * | |
1135 | * 1. fasync_list is modified only under process context socket lock | |
1136 | * i.e. under semaphore. | |
1137 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1138 | * or under socket lock |
1da177e4 LT |
1139 | */ |
1140 | ||
1141 | static int sock_fasync(int fd, struct file *filp, int on) | |
1142 | { | |
989a2979 ED |
1143 | struct socket *sock = filp->private_data; |
1144 | struct sock *sk = sock->sk; | |
eaefd110 | 1145 | struct socket_wq *wq; |
1da177e4 | 1146 | |
989a2979 | 1147 | if (sk == NULL) |
1da177e4 | 1148 | return -EINVAL; |
1da177e4 LT |
1149 | |
1150 | lock_sock(sk); | |
1e1d04e6 | 1151 | wq = rcu_dereference_protected(sock->wq, lockdep_sock_is_held(sk)); |
eaefd110 | 1152 | fasync_helper(fd, filp, on, &wq->fasync_list); |
1da177e4 | 1153 | |
eaefd110 | 1154 | if (!wq->fasync_list) |
989a2979 ED |
1155 | sock_reset_flag(sk, SOCK_FASYNC); |
1156 | else | |
bcdce719 | 1157 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1158 | |
989a2979 | 1159 | release_sock(sk); |
1da177e4 LT |
1160 | return 0; |
1161 | } | |
1162 | ||
ceb5d58b | 1163 | /* This function may be called only under rcu_lock */ |
1da177e4 | 1164 | |
ceb5d58b | 1165 | int sock_wake_async(struct socket_wq *wq, int how, int band) |
1da177e4 | 1166 | { |
ceb5d58b | 1167 | if (!wq || !wq->fasync_list) |
1da177e4 | 1168 | return -1; |
ceb5d58b | 1169 | |
89bddce5 | 1170 | switch (how) { |
8d8ad9d7 | 1171 | case SOCK_WAKE_WAITD: |
ceb5d58b | 1172 | if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags)) |
1da177e4 LT |
1173 | break; |
1174 | goto call_kill; | |
8d8ad9d7 | 1175 | case SOCK_WAKE_SPACE: |
ceb5d58b | 1176 | if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags)) |
1da177e4 LT |
1177 | break; |
1178 | /* fall through */ | |
8d8ad9d7 | 1179 | case SOCK_WAKE_IO: |
89bddce5 | 1180 | call_kill: |
43815482 | 1181 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1182 | break; |
8d8ad9d7 | 1183 | case SOCK_WAKE_URG: |
43815482 | 1184 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1185 | } |
ceb5d58b | 1186 | |
1da177e4 LT |
1187 | return 0; |
1188 | } | |
c6d409cf | 1189 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1190 | |
721db93a | 1191 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1192 | struct socket **res, int kern) |
1da177e4 LT |
1193 | { |
1194 | int err; | |
1195 | struct socket *sock; | |
55737fda | 1196 | const struct net_proto_family *pf; |
1da177e4 LT |
1197 | |
1198 | /* | |
89bddce5 | 1199 | * Check protocol is in range |
1da177e4 LT |
1200 | */ |
1201 | if (family < 0 || family >= NPROTO) | |
1202 | return -EAFNOSUPPORT; | |
1203 | if (type < 0 || type >= SOCK_MAX) | |
1204 | return -EINVAL; | |
1205 | ||
1206 | /* Compatibility. | |
1207 | ||
1208 | This uglymoron is moved from INET layer to here to avoid | |
1209 | deadlock in module load. | |
1210 | */ | |
1211 | if (family == PF_INET && type == SOCK_PACKET) { | |
f3c98690 | 1212 | pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1213 | current->comm); | |
1da177e4 LT |
1214 | family = PF_PACKET; |
1215 | } | |
1216 | ||
1217 | err = security_socket_create(family, type, protocol, kern); | |
1218 | if (err) | |
1219 | return err; | |
89bddce5 | 1220 | |
55737fda SH |
1221 | /* |
1222 | * Allocate the socket and allow the family to set things up. if | |
1223 | * the protocol is 0, the family is instructed to select an appropriate | |
1224 | * default. | |
1225 | */ | |
1226 | sock = sock_alloc(); | |
1227 | if (!sock) { | |
e87cc472 | 1228 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1229 | return -ENFILE; /* Not exactly a match, but its the |
1230 | closest posix thing */ | |
1231 | } | |
1232 | ||
1233 | sock->type = type; | |
1234 | ||
95a5afca | 1235 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1236 | /* Attempt to load a protocol module if the find failed. |
1237 | * | |
1238 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1239 | * requested real, full-featured networking support upon configuration. |
1240 | * Otherwise module support will break! | |
1241 | */ | |
190683a9 | 1242 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1243 | request_module("net-pf-%d", family); |
1da177e4 LT |
1244 | #endif |
1245 | ||
55737fda SH |
1246 | rcu_read_lock(); |
1247 | pf = rcu_dereference(net_families[family]); | |
1248 | err = -EAFNOSUPPORT; | |
1249 | if (!pf) | |
1250 | goto out_release; | |
1da177e4 LT |
1251 | |
1252 | /* | |
1253 | * We will call the ->create function, that possibly is in a loadable | |
1254 | * module, so we have to bump that loadable module refcnt first. | |
1255 | */ | |
55737fda | 1256 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1257 | goto out_release; |
1258 | ||
55737fda SH |
1259 | /* Now protected by module ref count */ |
1260 | rcu_read_unlock(); | |
1261 | ||
3f378b68 | 1262 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1263 | if (err < 0) |
1da177e4 | 1264 | goto out_module_put; |
a79af59e | 1265 | |
1da177e4 LT |
1266 | /* |
1267 | * Now to bump the refcnt of the [loadable] module that owns this | |
1268 | * socket at sock_release time we decrement its refcnt. | |
1269 | */ | |
55737fda SH |
1270 | if (!try_module_get(sock->ops->owner)) |
1271 | goto out_module_busy; | |
1272 | ||
1da177e4 LT |
1273 | /* |
1274 | * Now that we're done with the ->create function, the [loadable] | |
1275 | * module can have its refcnt decremented | |
1276 | */ | |
55737fda | 1277 | module_put(pf->owner); |
7420ed23 VY |
1278 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1279 | if (err) | |
3b185525 | 1280 | goto out_sock_release; |
55737fda | 1281 | *res = sock; |
1da177e4 | 1282 | |
55737fda SH |
1283 | return 0; |
1284 | ||
1285 | out_module_busy: | |
1286 | err = -EAFNOSUPPORT; | |
1da177e4 | 1287 | out_module_put: |
55737fda SH |
1288 | sock->ops = NULL; |
1289 | module_put(pf->owner); | |
1290 | out_sock_release: | |
1da177e4 | 1291 | sock_release(sock); |
55737fda SH |
1292 | return err; |
1293 | ||
1294 | out_release: | |
1295 | rcu_read_unlock(); | |
1296 | goto out_sock_release; | |
1da177e4 | 1297 | } |
721db93a | 1298 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1299 | |
1300 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1301 | { | |
1b8d7ae4 | 1302 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1303 | } |
c6d409cf | 1304 | EXPORT_SYMBOL(sock_create); |
1da177e4 | 1305 | |
eeb1bd5c | 1306 | int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res) |
1da177e4 | 1307 | { |
eeb1bd5c | 1308 | return __sock_create(net, family, type, protocol, res, 1); |
1da177e4 | 1309 | } |
c6d409cf | 1310 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1311 | |
3e0fa65f | 1312 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1313 | { |
1314 | int retval; | |
1315 | struct socket *sock; | |
a677a039 UD |
1316 | int flags; |
1317 | ||
e38b36f3 UD |
1318 | /* Check the SOCK_* constants for consistency. */ |
1319 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1320 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1321 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1322 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1323 | ||
a677a039 | 1324 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1325 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1326 | return -EINVAL; |
1327 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1328 | |
aaca0bdc UD |
1329 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1330 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1331 | ||
1da177e4 LT |
1332 | retval = sock_create(family, type, protocol, &sock); |
1333 | if (retval < 0) | |
1334 | goto out; | |
1335 | ||
77d27200 | 1336 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1337 | if (retval < 0) |
1338 | goto out_release; | |
1339 | ||
1340 | out: | |
1341 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1342 | return retval; | |
1343 | ||
1344 | out_release: | |
1345 | sock_release(sock); | |
1346 | return retval; | |
1347 | } | |
1348 | ||
1349 | /* | |
1350 | * Create a pair of connected sockets. | |
1351 | */ | |
1352 | ||
3e0fa65f HC |
1353 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1354 | int __user *, usockvec) | |
1da177e4 LT |
1355 | { |
1356 | struct socket *sock1, *sock2; | |
1357 | int fd1, fd2, err; | |
db349509 | 1358 | struct file *newfile1, *newfile2; |
a677a039 UD |
1359 | int flags; |
1360 | ||
1361 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1362 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1363 | return -EINVAL; |
1364 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1365 | |
aaca0bdc UD |
1366 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1367 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1368 | ||
1da177e4 LT |
1369 | /* |
1370 | * Obtain the first socket and check if the underlying protocol | |
1371 | * supports the socketpair call. | |
1372 | */ | |
1373 | ||
1374 | err = sock_create(family, type, protocol, &sock1); | |
1375 | if (err < 0) | |
1376 | goto out; | |
1377 | ||
1378 | err = sock_create(family, type, protocol, &sock2); | |
1379 | if (err < 0) | |
1380 | goto out_release_1; | |
1381 | ||
1382 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1383 | if (err < 0) |
1da177e4 LT |
1384 | goto out_release_both; |
1385 | ||
28407630 | 1386 | fd1 = get_unused_fd_flags(flags); |
bf3c23d1 DM |
1387 | if (unlikely(fd1 < 0)) { |
1388 | err = fd1; | |
db349509 | 1389 | goto out_release_both; |
bf3c23d1 | 1390 | } |
d73aa286 | 1391 | |
28407630 | 1392 | fd2 = get_unused_fd_flags(flags); |
198de4d7 AV |
1393 | if (unlikely(fd2 < 0)) { |
1394 | err = fd2; | |
d73aa286 | 1395 | goto out_put_unused_1; |
28407630 AV |
1396 | } |
1397 | ||
aab174f0 | 1398 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
b5ffe634 | 1399 | if (IS_ERR(newfile1)) { |
28407630 | 1400 | err = PTR_ERR(newfile1); |
d73aa286 | 1401 | goto out_put_unused_both; |
28407630 AV |
1402 | } |
1403 | ||
aab174f0 | 1404 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1405 | if (IS_ERR(newfile2)) { |
1406 | err = PTR_ERR(newfile2); | |
d73aa286 | 1407 | goto out_fput_1; |
db349509 AV |
1408 | } |
1409 | ||
d73aa286 YD |
1410 | err = put_user(fd1, &usockvec[0]); |
1411 | if (err) | |
1412 | goto out_fput_both; | |
1413 | ||
1414 | err = put_user(fd2, &usockvec[1]); | |
1415 | if (err) | |
1416 | goto out_fput_both; | |
1417 | ||
157cf649 | 1418 | audit_fd_pair(fd1, fd2); |
d73aa286 | 1419 | |
db349509 AV |
1420 | fd_install(fd1, newfile1); |
1421 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1422 | /* fd1 and fd2 may be already another descriptors. |
1423 | * Not kernel problem. | |
1424 | */ | |
1425 | ||
d73aa286 | 1426 | return 0; |
1da177e4 | 1427 | |
d73aa286 YD |
1428 | out_fput_both: |
1429 | fput(newfile2); | |
1430 | fput(newfile1); | |
1431 | put_unused_fd(fd2); | |
1432 | put_unused_fd(fd1); | |
1433 | goto out; | |
1434 | ||
1435 | out_fput_1: | |
1436 | fput(newfile1); | |
1437 | put_unused_fd(fd2); | |
1438 | put_unused_fd(fd1); | |
1439 | sock_release(sock2); | |
1440 | goto out; | |
1da177e4 | 1441 | |
d73aa286 YD |
1442 | out_put_unused_both: |
1443 | put_unused_fd(fd2); | |
1444 | out_put_unused_1: | |
1445 | put_unused_fd(fd1); | |
1da177e4 | 1446 | out_release_both: |
89bddce5 | 1447 | sock_release(sock2); |
1da177e4 | 1448 | out_release_1: |
89bddce5 | 1449 | sock_release(sock1); |
1da177e4 LT |
1450 | out: |
1451 | return err; | |
1452 | } | |
1453 | ||
1da177e4 LT |
1454 | /* |
1455 | * Bind a name to a socket. Nothing much to do here since it's | |
1456 | * the protocol's responsibility to handle the local address. | |
1457 | * | |
1458 | * We move the socket address to kernel space before we call | |
1459 | * the protocol layer (having also checked the address is ok). | |
1460 | */ | |
1461 | ||
20f37034 | 1462 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1463 | { |
1464 | struct socket *sock; | |
230b1839 | 1465 | struct sockaddr_storage address; |
6cb153ca | 1466 | int err, fput_needed; |
1da177e4 | 1467 | |
89bddce5 | 1468 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1469 | if (sock) { |
43db362d | 1470 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1471 | if (err >= 0) { |
1472 | err = security_socket_bind(sock, | |
230b1839 | 1473 | (struct sockaddr *)&address, |
89bddce5 | 1474 | addrlen); |
6cb153ca BL |
1475 | if (!err) |
1476 | err = sock->ops->bind(sock, | |
89bddce5 | 1477 | (struct sockaddr *) |
230b1839 | 1478 | &address, addrlen); |
1da177e4 | 1479 | } |
6cb153ca | 1480 | fput_light(sock->file, fput_needed); |
89bddce5 | 1481 | } |
1da177e4 LT |
1482 | return err; |
1483 | } | |
1484 | ||
1da177e4 LT |
1485 | /* |
1486 | * Perform a listen. Basically, we allow the protocol to do anything | |
1487 | * necessary for a listen, and if that works, we mark the socket as | |
1488 | * ready for listening. | |
1489 | */ | |
1490 | ||
3e0fa65f | 1491 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1492 | { |
1493 | struct socket *sock; | |
6cb153ca | 1494 | int err, fput_needed; |
b8e1f9b5 | 1495 | int somaxconn; |
89bddce5 SH |
1496 | |
1497 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1498 | if (sock) { | |
8efa6e93 | 1499 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1500 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1501 | backlog = somaxconn; |
1da177e4 LT |
1502 | |
1503 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1504 | if (!err) |
1505 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1506 | |
6cb153ca | 1507 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1508 | } |
1509 | return err; | |
1510 | } | |
1511 | ||
1da177e4 LT |
1512 | /* |
1513 | * For accept, we attempt to create a new socket, set up the link | |
1514 | * with the client, wake up the client, then return the new | |
1515 | * connected fd. We collect the address of the connector in kernel | |
1516 | * space and move it to user at the very end. This is unclean because | |
1517 | * we open the socket then return an error. | |
1518 | * | |
1519 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1520 | * status to recvmsg. We need to add that support in a way thats | |
1521 | * clean when we restucture accept also. | |
1522 | */ | |
1523 | ||
20f37034 HC |
1524 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1525 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1526 | { |
1527 | struct socket *sock, *newsock; | |
39d8c1b6 | 1528 | struct file *newfile; |
6cb153ca | 1529 | int err, len, newfd, fput_needed; |
230b1839 | 1530 | struct sockaddr_storage address; |
1da177e4 | 1531 | |
77d27200 | 1532 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1533 | return -EINVAL; |
1534 | ||
1535 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1536 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1537 | ||
6cb153ca | 1538 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1539 | if (!sock) |
1540 | goto out; | |
1541 | ||
1542 | err = -ENFILE; | |
c6d409cf ED |
1543 | newsock = sock_alloc(); |
1544 | if (!newsock) | |
1da177e4 LT |
1545 | goto out_put; |
1546 | ||
1547 | newsock->type = sock->type; | |
1548 | newsock->ops = sock->ops; | |
1549 | ||
1da177e4 LT |
1550 | /* |
1551 | * We don't need try_module_get here, as the listening socket (sock) | |
1552 | * has the protocol module (sock->ops->owner) held. | |
1553 | */ | |
1554 | __module_get(newsock->ops->owner); | |
1555 | ||
28407630 | 1556 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1557 | if (unlikely(newfd < 0)) { |
1558 | err = newfd; | |
9a1875e6 DM |
1559 | sock_release(newsock); |
1560 | goto out_put; | |
39d8c1b6 | 1561 | } |
aab174f0 | 1562 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
b5ffe634 | 1563 | if (IS_ERR(newfile)) { |
28407630 AV |
1564 | err = PTR_ERR(newfile); |
1565 | put_unused_fd(newfd); | |
1566 | sock_release(newsock); | |
1567 | goto out_put; | |
1568 | } | |
39d8c1b6 | 1569 | |
a79af59e FF |
1570 | err = security_socket_accept(sock, newsock); |
1571 | if (err) | |
39d8c1b6 | 1572 | goto out_fd; |
a79af59e | 1573 | |
cdfbabfb | 1574 | err = sock->ops->accept(sock, newsock, sock->file->f_flags, false); |
1da177e4 | 1575 | if (err < 0) |
39d8c1b6 | 1576 | goto out_fd; |
1da177e4 LT |
1577 | |
1578 | if (upeer_sockaddr) { | |
230b1839 | 1579 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1580 | &len, 2) < 0) { |
1da177e4 | 1581 | err = -ECONNABORTED; |
39d8c1b6 | 1582 | goto out_fd; |
1da177e4 | 1583 | } |
43db362d | 1584 | err = move_addr_to_user(&address, |
230b1839 | 1585 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1586 | if (err < 0) |
39d8c1b6 | 1587 | goto out_fd; |
1da177e4 LT |
1588 | } |
1589 | ||
1590 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1591 | ||
39d8c1b6 DM |
1592 | fd_install(newfd, newfile); |
1593 | err = newfd; | |
1da177e4 | 1594 | |
1da177e4 | 1595 | out_put: |
6cb153ca | 1596 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1597 | out: |
1598 | return err; | |
39d8c1b6 | 1599 | out_fd: |
9606a216 | 1600 | fput(newfile); |
39d8c1b6 | 1601 | put_unused_fd(newfd); |
1da177e4 LT |
1602 | goto out_put; |
1603 | } | |
1604 | ||
20f37034 HC |
1605 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1606 | int __user *, upeer_addrlen) | |
aaca0bdc | 1607 | { |
de11defe | 1608 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1609 | } |
1610 | ||
1da177e4 LT |
1611 | /* |
1612 | * Attempt to connect to a socket with the server address. The address | |
1613 | * is in user space so we verify it is OK and move it to kernel space. | |
1614 | * | |
1615 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1616 | * break bindings | |
1617 | * | |
1618 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1619 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1620 | * include the -EINPROGRESS status for such sockets. | |
1621 | */ | |
1622 | ||
20f37034 HC |
1623 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1624 | int, addrlen) | |
1da177e4 LT |
1625 | { |
1626 | struct socket *sock; | |
230b1839 | 1627 | struct sockaddr_storage address; |
6cb153ca | 1628 | int err, fput_needed; |
1da177e4 | 1629 | |
6cb153ca | 1630 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1631 | if (!sock) |
1632 | goto out; | |
43db362d | 1633 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1634 | if (err < 0) |
1635 | goto out_put; | |
1636 | ||
89bddce5 | 1637 | err = |
230b1839 | 1638 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1639 | if (err) |
1640 | goto out_put; | |
1641 | ||
230b1839 | 1642 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1643 | sock->file->f_flags); |
1644 | out_put: | |
6cb153ca | 1645 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1646 | out: |
1647 | return err; | |
1648 | } | |
1649 | ||
1650 | /* | |
1651 | * Get the local address ('name') of a socket object. Move the obtained | |
1652 | * name to user space. | |
1653 | */ | |
1654 | ||
20f37034 HC |
1655 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1656 | int __user *, usockaddr_len) | |
1da177e4 LT |
1657 | { |
1658 | struct socket *sock; | |
230b1839 | 1659 | struct sockaddr_storage address; |
6cb153ca | 1660 | int len, err, fput_needed; |
89bddce5 | 1661 | |
6cb153ca | 1662 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1663 | if (!sock) |
1664 | goto out; | |
1665 | ||
1666 | err = security_socket_getsockname(sock); | |
1667 | if (err) | |
1668 | goto out_put; | |
1669 | ||
230b1839 | 1670 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1671 | if (err) |
1672 | goto out_put; | |
43db362d | 1673 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1674 | |
1675 | out_put: | |
6cb153ca | 1676 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1677 | out: |
1678 | return err; | |
1679 | } | |
1680 | ||
1681 | /* | |
1682 | * Get the remote address ('name') of a socket object. Move the obtained | |
1683 | * name to user space. | |
1684 | */ | |
1685 | ||
20f37034 HC |
1686 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1687 | int __user *, usockaddr_len) | |
1da177e4 LT |
1688 | { |
1689 | struct socket *sock; | |
230b1839 | 1690 | struct sockaddr_storage address; |
6cb153ca | 1691 | int len, err, fput_needed; |
1da177e4 | 1692 | |
89bddce5 SH |
1693 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1694 | if (sock != NULL) { | |
1da177e4 LT |
1695 | err = security_socket_getpeername(sock); |
1696 | if (err) { | |
6cb153ca | 1697 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1698 | return err; |
1699 | } | |
1700 | ||
89bddce5 | 1701 | err = |
230b1839 | 1702 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1703 | 1); |
1da177e4 | 1704 | if (!err) |
43db362d | 1705 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1706 | usockaddr_len); |
6cb153ca | 1707 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1708 | } |
1709 | return err; | |
1710 | } | |
1711 | ||
1712 | /* | |
1713 | * Send a datagram to a given address. We move the address into kernel | |
1714 | * space and check the user space data area is readable before invoking | |
1715 | * the protocol. | |
1716 | */ | |
1717 | ||
3e0fa65f | 1718 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1719 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1720 | int, addr_len) |
1da177e4 LT |
1721 | { |
1722 | struct socket *sock; | |
230b1839 | 1723 | struct sockaddr_storage address; |
1da177e4 LT |
1724 | int err; |
1725 | struct msghdr msg; | |
1726 | struct iovec iov; | |
6cb153ca | 1727 | int fput_needed; |
6cb153ca | 1728 | |
602bd0e9 AV |
1729 | err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter); |
1730 | if (unlikely(err)) | |
1731 | return err; | |
de0fa95c PE |
1732 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1733 | if (!sock) | |
4387ff75 | 1734 | goto out; |
6cb153ca | 1735 | |
89bddce5 | 1736 | msg.msg_name = NULL; |
89bddce5 SH |
1737 | msg.msg_control = NULL; |
1738 | msg.msg_controllen = 0; | |
1739 | msg.msg_namelen = 0; | |
6cb153ca | 1740 | if (addr) { |
43db362d | 1741 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1742 | if (err < 0) |
1743 | goto out_put; | |
230b1839 | 1744 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1745 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1746 | } |
1747 | if (sock->file->f_flags & O_NONBLOCK) | |
1748 | flags |= MSG_DONTWAIT; | |
1749 | msg.msg_flags = flags; | |
d8725c86 | 1750 | err = sock_sendmsg(sock, &msg); |
1da177e4 | 1751 | |
89bddce5 | 1752 | out_put: |
de0fa95c | 1753 | fput_light(sock->file, fput_needed); |
4387ff75 | 1754 | out: |
1da177e4 LT |
1755 | return err; |
1756 | } | |
1757 | ||
1758 | /* | |
89bddce5 | 1759 | * Send a datagram down a socket. |
1da177e4 LT |
1760 | */ |
1761 | ||
3e0fa65f | 1762 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1763 | unsigned int, flags) |
1da177e4 LT |
1764 | { |
1765 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1766 | } | |
1767 | ||
1768 | /* | |
89bddce5 | 1769 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1770 | * sender. We verify the buffers are writable and if needed move the |
1771 | * sender address from kernel to user space. | |
1772 | */ | |
1773 | ||
3e0fa65f | 1774 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1775 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1776 | int __user *, addr_len) |
1da177e4 LT |
1777 | { |
1778 | struct socket *sock; | |
1779 | struct iovec iov; | |
1780 | struct msghdr msg; | |
230b1839 | 1781 | struct sockaddr_storage address; |
89bddce5 | 1782 | int err, err2; |
6cb153ca BL |
1783 | int fput_needed; |
1784 | ||
602bd0e9 AV |
1785 | err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter); |
1786 | if (unlikely(err)) | |
1787 | return err; | |
de0fa95c | 1788 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1789 | if (!sock) |
de0fa95c | 1790 | goto out; |
1da177e4 | 1791 | |
89bddce5 SH |
1792 | msg.msg_control = NULL; |
1793 | msg.msg_controllen = 0; | |
f3d33426 HFS |
1794 | /* Save some cycles and don't copy the address if not needed */ |
1795 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1796 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1797 | msg.msg_namelen = 0; | |
130ed5d1 | 1798 | msg.msg_iocb = NULL; |
9f138fa6 | 1799 | msg.msg_flags = 0; |
1da177e4 LT |
1800 | if (sock->file->f_flags & O_NONBLOCK) |
1801 | flags |= MSG_DONTWAIT; | |
2da62906 | 1802 | err = sock_recvmsg(sock, &msg, flags); |
1da177e4 | 1803 | |
89bddce5 | 1804 | if (err >= 0 && addr != NULL) { |
43db362d | 1805 | err2 = move_addr_to_user(&address, |
230b1839 | 1806 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1807 | if (err2 < 0) |
1808 | err = err2; | |
1da177e4 | 1809 | } |
de0fa95c PE |
1810 | |
1811 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1812 | out: |
1da177e4 LT |
1813 | return err; |
1814 | } | |
1815 | ||
1816 | /* | |
89bddce5 | 1817 | * Receive a datagram from a socket. |
1da177e4 LT |
1818 | */ |
1819 | ||
b7c0ddf5 JG |
1820 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
1821 | unsigned int, flags) | |
1da177e4 LT |
1822 | { |
1823 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1824 | } | |
1825 | ||
1826 | /* | |
1827 | * Set a socket option. Because we don't know the option lengths we have | |
1828 | * to pass the user mode parameter for the protocols to sort out. | |
1829 | */ | |
1830 | ||
20f37034 HC |
1831 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1832 | char __user *, optval, int, optlen) | |
1da177e4 | 1833 | { |
6cb153ca | 1834 | int err, fput_needed; |
1da177e4 LT |
1835 | struct socket *sock; |
1836 | ||
1837 | if (optlen < 0) | |
1838 | return -EINVAL; | |
89bddce5 SH |
1839 | |
1840 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1841 | if (sock != NULL) { | |
1842 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1843 | if (err) |
1844 | goto out_put; | |
1da177e4 LT |
1845 | |
1846 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1847 | err = |
1848 | sock_setsockopt(sock, level, optname, optval, | |
1849 | optlen); | |
1da177e4 | 1850 | else |
89bddce5 SH |
1851 | err = |
1852 | sock->ops->setsockopt(sock, level, optname, optval, | |
1853 | optlen); | |
6cb153ca BL |
1854 | out_put: |
1855 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1856 | } |
1857 | return err; | |
1858 | } | |
1859 | ||
1860 | /* | |
1861 | * Get a socket option. Because we don't know the option lengths we have | |
1862 | * to pass a user mode parameter for the protocols to sort out. | |
1863 | */ | |
1864 | ||
20f37034 HC |
1865 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1866 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1867 | { |
6cb153ca | 1868 | int err, fput_needed; |
1da177e4 LT |
1869 | struct socket *sock; |
1870 | ||
89bddce5 SH |
1871 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1872 | if (sock != NULL) { | |
6cb153ca BL |
1873 | err = security_socket_getsockopt(sock, level, optname); |
1874 | if (err) | |
1875 | goto out_put; | |
1da177e4 LT |
1876 | |
1877 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1878 | err = |
1879 | sock_getsockopt(sock, level, optname, optval, | |
1880 | optlen); | |
1da177e4 | 1881 | else |
89bddce5 SH |
1882 | err = |
1883 | sock->ops->getsockopt(sock, level, optname, optval, | |
1884 | optlen); | |
6cb153ca BL |
1885 | out_put: |
1886 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1887 | } |
1888 | return err; | |
1889 | } | |
1890 | ||
1da177e4 LT |
1891 | /* |
1892 | * Shutdown a socket. | |
1893 | */ | |
1894 | ||
754fe8d2 | 1895 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1896 | { |
6cb153ca | 1897 | int err, fput_needed; |
1da177e4 LT |
1898 | struct socket *sock; |
1899 | ||
89bddce5 SH |
1900 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1901 | if (sock != NULL) { | |
1da177e4 | 1902 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1903 | if (!err) |
1904 | err = sock->ops->shutdown(sock, how); | |
1905 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1906 | } |
1907 | return err; | |
1908 | } | |
1909 | ||
89bddce5 | 1910 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1911 | * fields which are the same type (int / unsigned) on our platforms. |
1912 | */ | |
1913 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1914 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1915 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1916 | ||
c71d8ebe TH |
1917 | struct used_address { |
1918 | struct sockaddr_storage name; | |
1919 | unsigned int name_len; | |
1920 | }; | |
1921 | ||
da184284 AV |
1922 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
1923 | struct user_msghdr __user *umsg, | |
1924 | struct sockaddr __user **save_addr, | |
1925 | struct iovec **iov) | |
1661bf36 | 1926 | { |
ffb07550 | 1927 | struct user_msghdr msg; |
08adb7da AV |
1928 | ssize_t err; |
1929 | ||
ffb07550 | 1930 | if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
1661bf36 | 1931 | return -EFAULT; |
dbb490b9 | 1932 | |
864d9664 | 1933 | kmsg->msg_control = (void __force *)msg.msg_control; |
ffb07550 AV |
1934 | kmsg->msg_controllen = msg.msg_controllen; |
1935 | kmsg->msg_flags = msg.msg_flags; | |
1936 | ||
1937 | kmsg->msg_namelen = msg.msg_namelen; | |
1938 | if (!msg.msg_name) | |
6a2a2b3a AS |
1939 | kmsg->msg_namelen = 0; |
1940 | ||
dbb490b9 ML |
1941 | if (kmsg->msg_namelen < 0) |
1942 | return -EINVAL; | |
1943 | ||
1661bf36 | 1944 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 1945 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
08adb7da AV |
1946 | |
1947 | if (save_addr) | |
ffb07550 | 1948 | *save_addr = msg.msg_name; |
08adb7da | 1949 | |
ffb07550 | 1950 | if (msg.msg_name && kmsg->msg_namelen) { |
08adb7da | 1951 | if (!save_addr) { |
864d9664 PA |
1952 | err = move_addr_to_kernel(msg.msg_name, |
1953 | kmsg->msg_namelen, | |
08adb7da AV |
1954 | kmsg->msg_name); |
1955 | if (err < 0) | |
1956 | return err; | |
1957 | } | |
1958 | } else { | |
1959 | kmsg->msg_name = NULL; | |
1960 | kmsg->msg_namelen = 0; | |
1961 | } | |
1962 | ||
ffb07550 | 1963 | if (msg.msg_iovlen > UIO_MAXIOV) |
08adb7da AV |
1964 | return -EMSGSIZE; |
1965 | ||
0345f931 | 1966 | kmsg->msg_iocb = NULL; |
1967 | ||
ffb07550 AV |
1968 | return import_iovec(save_addr ? READ : WRITE, |
1969 | msg.msg_iov, msg.msg_iovlen, | |
da184284 | 1970 | UIO_FASTIOV, iov, &kmsg->msg_iter); |
1661bf36 DC |
1971 | } |
1972 | ||
666547ff | 1973 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 1974 | struct msghdr *msg_sys, unsigned int flags, |
28a94d8f TH |
1975 | struct used_address *used_address, |
1976 | unsigned int allowed_msghdr_flags) | |
1da177e4 | 1977 | { |
89bddce5 SH |
1978 | struct compat_msghdr __user *msg_compat = |
1979 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1980 | struct sockaddr_storage address; |
1da177e4 | 1981 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1982 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
846cc123 | 1983 | __aligned(sizeof(__kernel_size_t)); |
89bddce5 | 1984 | /* 20 is size of ipv6_pktinfo */ |
1da177e4 | 1985 | unsigned char *ctl_buf = ctl; |
d8725c86 | 1986 | int ctl_len; |
08adb7da | 1987 | ssize_t err; |
89bddce5 | 1988 | |
08adb7da | 1989 | msg_sys->msg_name = &address; |
1da177e4 | 1990 | |
08449320 | 1991 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 1992 | err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov); |
08449320 | 1993 | else |
08adb7da | 1994 | err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov); |
89bddce5 | 1995 | if (err < 0) |
da184284 | 1996 | return err; |
1da177e4 LT |
1997 | |
1998 | err = -ENOBUFS; | |
1999 | ||
228e548e | 2000 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2001 | goto out_freeiov; |
28a94d8f | 2002 | flags |= (msg_sys->msg_flags & allowed_msghdr_flags); |
228e548e | 2003 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2004 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2005 | err = |
228e548e | 2006 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2007 | sizeof(ctl)); |
1da177e4 LT |
2008 | if (err) |
2009 | goto out_freeiov; | |
228e548e AB |
2010 | ctl_buf = msg_sys->msg_control; |
2011 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2012 | } else if (ctl_len) { |
ac4340fc DM |
2013 | BUILD_BUG_ON(sizeof(struct cmsghdr) != |
2014 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
89bddce5 | 2015 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2016 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2017 | if (ctl_buf == NULL) |
1da177e4 LT |
2018 | goto out_freeiov; |
2019 | } | |
2020 | err = -EFAULT; | |
2021 | /* | |
228e548e | 2022 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2023 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2024 | * checking falls down on this. | |
2025 | */ | |
fb8621bb | 2026 | if (copy_from_user(ctl_buf, |
228e548e | 2027 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2028 | ctl_len)) |
1da177e4 | 2029 | goto out_freectl; |
228e548e | 2030 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2031 | } |
228e548e | 2032 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2033 | |
2034 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2035 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2036 | /* |
2037 | * If this is sendmmsg() and current destination address is same as | |
2038 | * previously succeeded address, omit asking LSM's decision. | |
2039 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2040 | * destination address never matches. | |
2041 | */ | |
bc909d9d MD |
2042 | if (used_address && msg_sys->msg_name && |
2043 | used_address->name_len == msg_sys->msg_namelen && | |
2044 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe | 2045 | used_address->name_len)) { |
d8725c86 | 2046 | err = sock_sendmsg_nosec(sock, msg_sys); |
c71d8ebe TH |
2047 | goto out_freectl; |
2048 | } | |
d8725c86 | 2049 | err = sock_sendmsg(sock, msg_sys); |
c71d8ebe TH |
2050 | /* |
2051 | * If this is sendmmsg() and sending to current destination address was | |
2052 | * successful, remember it. | |
2053 | */ | |
2054 | if (used_address && err >= 0) { | |
2055 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2056 | if (msg_sys->msg_name) |
2057 | memcpy(&used_address->name, msg_sys->msg_name, | |
2058 | used_address->name_len); | |
c71d8ebe | 2059 | } |
1da177e4 LT |
2060 | |
2061 | out_freectl: | |
89bddce5 | 2062 | if (ctl_buf != ctl) |
1da177e4 LT |
2063 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2064 | out_freeiov: | |
da184284 | 2065 | kfree(iov); |
228e548e AB |
2066 | return err; |
2067 | } | |
2068 | ||
2069 | /* | |
2070 | * BSD sendmsg interface | |
2071 | */ | |
2072 | ||
666547ff | 2073 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
228e548e AB |
2074 | { |
2075 | int fput_needed, err; | |
2076 | struct msghdr msg_sys; | |
1be374a0 AL |
2077 | struct socket *sock; |
2078 | ||
1be374a0 | 2079 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2080 | if (!sock) |
2081 | goto out; | |
2082 | ||
28a94d8f | 2083 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0); |
228e548e | 2084 | |
6cb153ca | 2085 | fput_light(sock->file, fput_needed); |
89bddce5 | 2086 | out: |
1da177e4 LT |
2087 | return err; |
2088 | } | |
2089 | ||
666547ff | 2090 | SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
a7526eb5 AL |
2091 | { |
2092 | if (flags & MSG_CMSG_COMPAT) | |
2093 | return -EINVAL; | |
2094 | return __sys_sendmsg(fd, msg, flags); | |
2095 | } | |
2096 | ||
228e548e AB |
2097 | /* |
2098 | * Linux sendmmsg interface | |
2099 | */ | |
2100 | ||
2101 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2102 | unsigned int flags) | |
2103 | { | |
2104 | int fput_needed, err, datagrams; | |
2105 | struct socket *sock; | |
2106 | struct mmsghdr __user *entry; | |
2107 | struct compat_mmsghdr __user *compat_entry; | |
2108 | struct msghdr msg_sys; | |
c71d8ebe | 2109 | struct used_address used_address; |
f092276d | 2110 | unsigned int oflags = flags; |
228e548e | 2111 | |
98382f41 AB |
2112 | if (vlen > UIO_MAXIOV) |
2113 | vlen = UIO_MAXIOV; | |
228e548e AB |
2114 | |
2115 | datagrams = 0; | |
2116 | ||
2117 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2118 | if (!sock) | |
2119 | return err; | |
2120 | ||
c71d8ebe | 2121 | used_address.name_len = UINT_MAX; |
228e548e AB |
2122 | entry = mmsg; |
2123 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2124 | err = 0; |
f092276d | 2125 | flags |= MSG_BATCH; |
228e548e AB |
2126 | |
2127 | while (datagrams < vlen) { | |
f092276d TH |
2128 | if (datagrams == vlen - 1) |
2129 | flags = oflags; | |
2130 | ||
228e548e | 2131 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2132 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
28a94d8f | 2133 | &msg_sys, flags, &used_address, MSG_EOR); |
228e548e AB |
2134 | if (err < 0) |
2135 | break; | |
2136 | err = __put_user(err, &compat_entry->msg_len); | |
2137 | ++compat_entry; | |
2138 | } else { | |
a7526eb5 | 2139 | err = ___sys_sendmsg(sock, |
666547ff | 2140 | (struct user_msghdr __user *)entry, |
28a94d8f | 2141 | &msg_sys, flags, &used_address, MSG_EOR); |
228e548e AB |
2142 | if (err < 0) |
2143 | break; | |
2144 | err = put_user(err, &entry->msg_len); | |
2145 | ++entry; | |
2146 | } | |
2147 | ||
2148 | if (err) | |
2149 | break; | |
2150 | ++datagrams; | |
3023898b SHY |
2151 | if (msg_data_left(&msg_sys)) |
2152 | break; | |
a78cb84c | 2153 | cond_resched(); |
228e548e AB |
2154 | } |
2155 | ||
228e548e AB |
2156 | fput_light(sock->file, fput_needed); |
2157 | ||
728ffb86 AB |
2158 | /* We only return an error if no datagrams were able to be sent */ |
2159 | if (datagrams != 0) | |
228e548e AB |
2160 | return datagrams; |
2161 | ||
228e548e AB |
2162 | return err; |
2163 | } | |
2164 | ||
2165 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2166 | unsigned int, vlen, unsigned int, flags) | |
2167 | { | |
1be374a0 AL |
2168 | if (flags & MSG_CMSG_COMPAT) |
2169 | return -EINVAL; | |
228e548e AB |
2170 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2171 | } | |
2172 | ||
666547ff | 2173 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 2174 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2175 | { |
89bddce5 SH |
2176 | struct compat_msghdr __user *msg_compat = |
2177 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2178 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2179 | struct iovec *iov = iovstack; |
1da177e4 | 2180 | unsigned long cmsg_ptr; |
2da62906 | 2181 | int len; |
08adb7da | 2182 | ssize_t err; |
1da177e4 LT |
2183 | |
2184 | /* kernel mode address */ | |
230b1839 | 2185 | struct sockaddr_storage addr; |
1da177e4 LT |
2186 | |
2187 | /* user mode address pointers */ | |
2188 | struct sockaddr __user *uaddr; | |
08adb7da | 2189 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
89bddce5 | 2190 | |
08adb7da | 2191 | msg_sys->msg_name = &addr; |
1da177e4 | 2192 | |
f3d33426 | 2193 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 2194 | err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov); |
f3d33426 | 2195 | else |
08adb7da | 2196 | err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov); |
1da177e4 | 2197 | if (err < 0) |
da184284 | 2198 | return err; |
1da177e4 | 2199 | |
a2e27255 ACM |
2200 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2201 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2202 | |
f3d33426 HFS |
2203 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2204 | msg_sys->msg_namelen = 0; | |
2205 | ||
1da177e4 LT |
2206 | if (sock->file->f_flags & O_NONBLOCK) |
2207 | flags |= MSG_DONTWAIT; | |
2da62906 | 2208 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, flags); |
1da177e4 LT |
2209 | if (err < 0) |
2210 | goto out_freeiov; | |
2211 | len = err; | |
2212 | ||
2213 | if (uaddr != NULL) { | |
43db362d | 2214 | err = move_addr_to_user(&addr, |
a2e27255 | 2215 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2216 | uaddr_len); |
1da177e4 LT |
2217 | if (err < 0) |
2218 | goto out_freeiov; | |
2219 | } | |
a2e27255 | 2220 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2221 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2222 | if (err) |
2223 | goto out_freeiov; | |
2224 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2225 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2226 | &msg_compat->msg_controllen); |
2227 | else | |
a2e27255 | 2228 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2229 | &msg->msg_controllen); |
2230 | if (err) | |
2231 | goto out_freeiov; | |
2232 | err = len; | |
2233 | ||
2234 | out_freeiov: | |
da184284 | 2235 | kfree(iov); |
a2e27255 ACM |
2236 | return err; |
2237 | } | |
2238 | ||
2239 | /* | |
2240 | * BSD recvmsg interface | |
2241 | */ | |
2242 | ||
666547ff | 2243 | long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2244 | { |
2245 | int fput_needed, err; | |
2246 | struct msghdr msg_sys; | |
1be374a0 AL |
2247 | struct socket *sock; |
2248 | ||
1be374a0 | 2249 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2250 | if (!sock) |
2251 | goto out; | |
2252 | ||
a7526eb5 | 2253 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2254 | |
6cb153ca | 2255 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2256 | out: |
2257 | return err; | |
2258 | } | |
2259 | ||
666547ff | 2260 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
a7526eb5 AL |
2261 | unsigned int, flags) |
2262 | { | |
2263 | if (flags & MSG_CMSG_COMPAT) | |
2264 | return -EINVAL; | |
2265 | return __sys_recvmsg(fd, msg, flags); | |
2266 | } | |
2267 | ||
a2e27255 ACM |
2268 | /* |
2269 | * Linux recvmmsg interface | |
2270 | */ | |
2271 | ||
2272 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2273 | unsigned int flags, struct timespec *timeout) | |
2274 | { | |
2275 | int fput_needed, err, datagrams; | |
2276 | struct socket *sock; | |
2277 | struct mmsghdr __user *entry; | |
d7256d0e | 2278 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 | 2279 | struct msghdr msg_sys; |
766b9f92 DD |
2280 | struct timespec64 end_time; |
2281 | struct timespec64 timeout64; | |
a2e27255 ACM |
2282 | |
2283 | if (timeout && | |
2284 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2285 | timeout->tv_nsec)) | |
2286 | return -EINVAL; | |
2287 | ||
2288 | datagrams = 0; | |
2289 | ||
2290 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2291 | if (!sock) | |
2292 | return err; | |
2293 | ||
2294 | err = sock_error(sock->sk); | |
e623a9e9 MJ |
2295 | if (err) { |
2296 | datagrams = err; | |
a2e27255 | 2297 | goto out_put; |
e623a9e9 | 2298 | } |
a2e27255 ACM |
2299 | |
2300 | entry = mmsg; | |
d7256d0e | 2301 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2302 | |
2303 | while (datagrams < vlen) { | |
2304 | /* | |
2305 | * No need to ask LSM for more than the first datagram. | |
2306 | */ | |
d7256d0e | 2307 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2308 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5 AL |
2309 | &msg_sys, flags & ~MSG_WAITFORONE, |
2310 | datagrams); | |
d7256d0e JMG |
2311 | if (err < 0) |
2312 | break; | |
2313 | err = __put_user(err, &compat_entry->msg_len); | |
2314 | ++compat_entry; | |
2315 | } else { | |
a7526eb5 | 2316 | err = ___sys_recvmsg(sock, |
666547ff | 2317 | (struct user_msghdr __user *)entry, |
a7526eb5 AL |
2318 | &msg_sys, flags & ~MSG_WAITFORONE, |
2319 | datagrams); | |
d7256d0e JMG |
2320 | if (err < 0) |
2321 | break; | |
2322 | err = put_user(err, &entry->msg_len); | |
2323 | ++entry; | |
2324 | } | |
2325 | ||
a2e27255 ACM |
2326 | if (err) |
2327 | break; | |
a2e27255 ACM |
2328 | ++datagrams; |
2329 | ||
71c5c159 BB |
2330 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2331 | if (flags & MSG_WAITFORONE) | |
2332 | flags |= MSG_DONTWAIT; | |
2333 | ||
a2e27255 | 2334 | if (timeout) { |
766b9f92 DD |
2335 | ktime_get_ts64(&timeout64); |
2336 | *timeout = timespec64_to_timespec( | |
2337 | timespec64_sub(end_time, timeout64)); | |
a2e27255 ACM |
2338 | if (timeout->tv_sec < 0) { |
2339 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2340 | break; | |
2341 | } | |
2342 | ||
2343 | /* Timeout, return less than vlen datagrams */ | |
2344 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2345 | break; | |
2346 | } | |
2347 | ||
2348 | /* Out of band data, return right away */ | |
2349 | if (msg_sys.msg_flags & MSG_OOB) | |
2350 | break; | |
a78cb84c | 2351 | cond_resched(); |
a2e27255 ACM |
2352 | } |
2353 | ||
a2e27255 | 2354 | if (err == 0) |
34b88a68 ACM |
2355 | goto out_put; |
2356 | ||
2357 | if (datagrams == 0) { | |
2358 | datagrams = err; | |
2359 | goto out_put; | |
2360 | } | |
a2e27255 | 2361 | |
34b88a68 ACM |
2362 | /* |
2363 | * We may return less entries than requested (vlen) if the | |
2364 | * sock is non block and there aren't enough datagrams... | |
2365 | */ | |
2366 | if (err != -EAGAIN) { | |
a2e27255 | 2367 | /* |
34b88a68 ACM |
2368 | * ... or if recvmsg returns an error after we |
2369 | * received some datagrams, where we record the | |
2370 | * error to return on the next call or if the | |
2371 | * app asks about it using getsockopt(SO_ERROR). | |
a2e27255 | 2372 | */ |
34b88a68 | 2373 | sock->sk->sk_err = -err; |
a2e27255 | 2374 | } |
34b88a68 ACM |
2375 | out_put: |
2376 | fput_light(sock->file, fput_needed); | |
a2e27255 | 2377 | |
34b88a68 | 2378 | return datagrams; |
a2e27255 ACM |
2379 | } |
2380 | ||
2381 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2382 | unsigned int, vlen, unsigned int, flags, | |
2383 | struct timespec __user *, timeout) | |
2384 | { | |
2385 | int datagrams; | |
2386 | struct timespec timeout_sys; | |
2387 | ||
1be374a0 AL |
2388 | if (flags & MSG_CMSG_COMPAT) |
2389 | return -EINVAL; | |
2390 | ||
a2e27255 ACM |
2391 | if (!timeout) |
2392 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2393 | ||
2394 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2395 | return -EFAULT; | |
2396 | ||
2397 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2398 | ||
2399 | if (datagrams > 0 && | |
2400 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2401 | datagrams = -EFAULT; | |
2402 | ||
2403 | return datagrams; | |
2404 | } | |
2405 | ||
2406 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2407 | /* Argument list sizes for sys_socketcall */ |
2408 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2409 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2410 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2411 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2412 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2413 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2414 | }; |
2415 | ||
1da177e4 LT |
2416 | #undef AL |
2417 | ||
2418 | /* | |
89bddce5 | 2419 | * System call vectors. |
1da177e4 LT |
2420 | * |
2421 | * Argument checking cleaned up. Saved 20% in size. | |
2422 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2423 | * it is set by the callees. |
1da177e4 LT |
2424 | */ |
2425 | ||
3e0fa65f | 2426 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2427 | { |
2950fa9d | 2428 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2429 | unsigned long a0, a1; |
1da177e4 | 2430 | int err; |
47379052 | 2431 | unsigned int len; |
1da177e4 | 2432 | |
228e548e | 2433 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2434 | return -EINVAL; |
2435 | ||
47379052 AV |
2436 | len = nargs[call]; |
2437 | if (len > sizeof(a)) | |
2438 | return -EINVAL; | |
2439 | ||
1da177e4 | 2440 | /* copy_from_user should be SMP safe. */ |
47379052 | 2441 | if (copy_from_user(a, args, len)) |
1da177e4 | 2442 | return -EFAULT; |
3ec3b2fb | 2443 | |
2950fa9d CG |
2444 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2445 | if (err) | |
2446 | return err; | |
3ec3b2fb | 2447 | |
89bddce5 SH |
2448 | a0 = a[0]; |
2449 | a1 = a[1]; | |
2450 | ||
2451 | switch (call) { | |
2452 | case SYS_SOCKET: | |
2453 | err = sys_socket(a0, a1, a[2]); | |
2454 | break; | |
2455 | case SYS_BIND: | |
2456 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2457 | break; | |
2458 | case SYS_CONNECT: | |
2459 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2460 | break; | |
2461 | case SYS_LISTEN: | |
2462 | err = sys_listen(a0, a1); | |
2463 | break; | |
2464 | case SYS_ACCEPT: | |
de11defe UD |
2465 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2466 | (int __user *)a[2], 0); | |
89bddce5 SH |
2467 | break; |
2468 | case SYS_GETSOCKNAME: | |
2469 | err = | |
2470 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2471 | (int __user *)a[2]); | |
2472 | break; | |
2473 | case SYS_GETPEERNAME: | |
2474 | err = | |
2475 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2476 | (int __user *)a[2]); | |
2477 | break; | |
2478 | case SYS_SOCKETPAIR: | |
2479 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2480 | break; | |
2481 | case SYS_SEND: | |
2482 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2483 | break; | |
2484 | case SYS_SENDTO: | |
2485 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2486 | (struct sockaddr __user *)a[4], a[5]); | |
2487 | break; | |
2488 | case SYS_RECV: | |
2489 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2490 | break; | |
2491 | case SYS_RECVFROM: | |
2492 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2493 | (struct sockaddr __user *)a[4], | |
2494 | (int __user *)a[5]); | |
2495 | break; | |
2496 | case SYS_SHUTDOWN: | |
2497 | err = sys_shutdown(a0, a1); | |
2498 | break; | |
2499 | case SYS_SETSOCKOPT: | |
2500 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2501 | break; | |
2502 | case SYS_GETSOCKOPT: | |
2503 | err = | |
2504 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2505 | (int __user *)a[4]); | |
2506 | break; | |
2507 | case SYS_SENDMSG: | |
666547ff | 2508 | err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce5 | 2509 | break; |
228e548e AB |
2510 | case SYS_SENDMMSG: |
2511 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2512 | break; | |
89bddce5 | 2513 | case SYS_RECVMSG: |
666547ff | 2514 | err = sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce5 | 2515 | break; |
a2e27255 ACM |
2516 | case SYS_RECVMMSG: |
2517 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2518 | (struct timespec __user *)a[4]); | |
2519 | break; | |
de11defe UD |
2520 | case SYS_ACCEPT4: |
2521 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2522 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2523 | break; |
89bddce5 SH |
2524 | default: |
2525 | err = -EINVAL; | |
2526 | break; | |
1da177e4 LT |
2527 | } |
2528 | return err; | |
2529 | } | |
2530 | ||
89bddce5 | 2531 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2532 | |
55737fda SH |
2533 | /** |
2534 | * sock_register - add a socket protocol handler | |
2535 | * @ops: description of protocol | |
2536 | * | |
1da177e4 LT |
2537 | * This function is called by a protocol handler that wants to |
2538 | * advertise its address family, and have it linked into the | |
e793c0f7 | 2539 | * socket interface. The value ops->family corresponds to the |
55737fda | 2540 | * socket system call protocol family. |
1da177e4 | 2541 | */ |
f0fd27d4 | 2542 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2543 | { |
2544 | int err; | |
2545 | ||
2546 | if (ops->family >= NPROTO) { | |
3410f22e | 2547 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
1da177e4 LT |
2548 | return -ENOBUFS; |
2549 | } | |
55737fda SH |
2550 | |
2551 | spin_lock(&net_family_lock); | |
190683a9 ED |
2552 | if (rcu_dereference_protected(net_families[ops->family], |
2553 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2554 | err = -EEXIST; |
2555 | else { | |
cf778b00 | 2556 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2557 | err = 0; |
2558 | } | |
55737fda SH |
2559 | spin_unlock(&net_family_lock); |
2560 | ||
3410f22e | 2561 | pr_info("NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2562 | return err; |
2563 | } | |
c6d409cf | 2564 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2565 | |
55737fda SH |
2566 | /** |
2567 | * sock_unregister - remove a protocol handler | |
2568 | * @family: protocol family to remove | |
2569 | * | |
1da177e4 LT |
2570 | * This function is called by a protocol handler that wants to |
2571 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2572 | * new socket creation. |
2573 | * | |
2574 | * If protocol handler is a module, then it can use module reference | |
2575 | * counts to protect against new references. If protocol handler is not | |
2576 | * a module then it needs to provide its own protection in | |
2577 | * the ops->create routine. | |
1da177e4 | 2578 | */ |
f0fd27d4 | 2579 | void sock_unregister(int family) |
1da177e4 | 2580 | { |
f0fd27d4 | 2581 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2582 | |
55737fda | 2583 | spin_lock(&net_family_lock); |
a9b3cd7f | 2584 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2585 | spin_unlock(&net_family_lock); |
2586 | ||
2587 | synchronize_rcu(); | |
2588 | ||
3410f22e | 2589 | pr_info("NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2590 | } |
c6d409cf | 2591 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2592 | |
77d76ea3 | 2593 | static int __init sock_init(void) |
1da177e4 | 2594 | { |
b3e19d92 | 2595 | int err; |
2ca794e5 EB |
2596 | /* |
2597 | * Initialize the network sysctl infrastructure. | |
2598 | */ | |
2599 | err = net_sysctl_init(); | |
2600 | if (err) | |
2601 | goto out; | |
b3e19d92 | 2602 | |
1da177e4 | 2603 | /* |
89bddce5 | 2604 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2605 | */ |
2606 | skb_init(); | |
1da177e4 LT |
2607 | |
2608 | /* | |
89bddce5 | 2609 | * Initialize the protocols module. |
1da177e4 LT |
2610 | */ |
2611 | ||
2612 | init_inodecache(); | |
b3e19d92 NP |
2613 | |
2614 | err = register_filesystem(&sock_fs_type); | |
2615 | if (err) | |
2616 | goto out_fs; | |
1da177e4 | 2617 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2618 | if (IS_ERR(sock_mnt)) { |
2619 | err = PTR_ERR(sock_mnt); | |
2620 | goto out_mount; | |
2621 | } | |
77d76ea3 AK |
2622 | |
2623 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2624 | */ |
2625 | ||
2626 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2627 | err = netfilter_init(); |
2628 | if (err) | |
2629 | goto out; | |
1da177e4 | 2630 | #endif |
cbeb321a | 2631 | |
408eccce | 2632 | ptp_classifier_init(); |
c1f19b51 | 2633 | |
b3e19d92 NP |
2634 | out: |
2635 | return err; | |
2636 | ||
2637 | out_mount: | |
2638 | unregister_filesystem(&sock_fs_type); | |
2639 | out_fs: | |
2640 | goto out; | |
1da177e4 LT |
2641 | } |
2642 | ||
77d76ea3 AK |
2643 | core_initcall(sock_init); /* early initcall */ |
2644 | ||
1da177e4 LT |
2645 | #ifdef CONFIG_PROC_FS |
2646 | void socket_seq_show(struct seq_file *seq) | |
2647 | { | |
2648 | int cpu; | |
2649 | int counter = 0; | |
2650 | ||
6f912042 | 2651 | for_each_possible_cpu(cpu) |
89bddce5 | 2652 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2653 | |
2654 | /* It can be negative, by the way. 8) */ | |
2655 | if (counter < 0) | |
2656 | counter = 0; | |
2657 | ||
2658 | seq_printf(seq, "sockets: used %d\n", counter); | |
2659 | } | |
89bddce5 | 2660 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2661 | |
89bbfc95 | 2662 | #ifdef CONFIG_COMPAT |
6b96018b | 2663 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2664 | unsigned int cmd, void __user *up) |
7a229387 | 2665 | { |
7a229387 AB |
2666 | mm_segment_t old_fs = get_fs(); |
2667 | struct timeval ktv; | |
2668 | int err; | |
2669 | ||
2670 | set_fs(KERNEL_DS); | |
6b96018b | 2671 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2672 | set_fs(old_fs); |
644595f8 | 2673 | if (!err) |
ed6fe9d6 | 2674 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2675 | |
7a229387 AB |
2676 | return err; |
2677 | } | |
2678 | ||
6b96018b | 2679 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2680 | unsigned int cmd, void __user *up) |
7a229387 | 2681 | { |
7a229387 AB |
2682 | mm_segment_t old_fs = get_fs(); |
2683 | struct timespec kts; | |
2684 | int err; | |
2685 | ||
2686 | set_fs(KERNEL_DS); | |
6b96018b | 2687 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2688 | set_fs(old_fs); |
644595f8 | 2689 | if (!err) |
ed6fe9d6 | 2690 | err = compat_put_timespec(&kts, up); |
644595f8 | 2691 | |
7a229387 AB |
2692 | return err; |
2693 | } | |
2694 | ||
6b96018b | 2695 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2696 | { |
2697 | struct ifreq __user *uifr; | |
2698 | int err; | |
2699 | ||
2700 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2701 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2702 | return -EFAULT; |
2703 | ||
6b96018b | 2704 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2705 | if (err) |
2706 | return err; | |
2707 | ||
6b96018b | 2708 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2709 | return -EFAULT; |
2710 | ||
2711 | return 0; | |
2712 | } | |
2713 | ||
6b96018b | 2714 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2715 | { |
6b96018b | 2716 | struct compat_ifconf ifc32; |
7a229387 AB |
2717 | struct ifconf ifc; |
2718 | struct ifconf __user *uifc; | |
6b96018b | 2719 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2720 | struct ifreq __user *ifr; |
2721 | unsigned int i, j; | |
2722 | int err; | |
2723 | ||
6b96018b | 2724 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2725 | return -EFAULT; |
2726 | ||
43da5f2e | 2727 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2728 | if (ifc32.ifcbuf == 0) { |
2729 | ifc32.ifc_len = 0; | |
2730 | ifc.ifc_len = 0; | |
2731 | ifc.ifc_req = NULL; | |
2732 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2733 | } else { | |
c6d409cf ED |
2734 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2735 | sizeof(struct ifreq); | |
7a229387 AB |
2736 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2737 | ifc.ifc_len = len; | |
2738 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2739 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2740 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2741 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2742 | return -EFAULT; |
2743 | ifr++; | |
2744 | ifr32++; | |
2745 | } | |
2746 | } | |
2747 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2748 | return -EFAULT; | |
2749 | ||
6b96018b | 2750 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2751 | if (err) |
2752 | return err; | |
2753 | ||
2754 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2755 | return -EFAULT; | |
2756 | ||
2757 | ifr = ifc.ifc_req; | |
2758 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2759 | for (i = 0, j = 0; | |
c6d409cf ED |
2760 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2761 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2762 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2763 | return -EFAULT; |
2764 | ifr32++; | |
2765 | ifr++; | |
2766 | } | |
2767 | ||
2768 | if (ifc32.ifcbuf == 0) { | |
2769 | /* Translate from 64-bit structure multiple to | |
2770 | * a 32-bit one. | |
2771 | */ | |
2772 | i = ifc.ifc_len; | |
6b96018b | 2773 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2774 | ifc32.ifc_len = i; |
2775 | } else { | |
2776 | ifc32.ifc_len = i; | |
2777 | } | |
6b96018b | 2778 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2779 | return -EFAULT; |
2780 | ||
2781 | return 0; | |
2782 | } | |
2783 | ||
6b96018b | 2784 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2785 | { |
3a7da39d BH |
2786 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2787 | bool convert_in = false, convert_out = false; | |
2788 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2789 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2790 | struct ifreq __user *ifr; |
3a7da39d BH |
2791 | u32 rule_cnt = 0, actual_rule_cnt; |
2792 | u32 ethcmd; | |
7a229387 | 2793 | u32 data; |
3a7da39d | 2794 | int ret; |
7a229387 | 2795 | |
3a7da39d BH |
2796 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2797 | return -EFAULT; | |
7a229387 | 2798 | |
3a7da39d BH |
2799 | compat_rxnfc = compat_ptr(data); |
2800 | ||
2801 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2802 | return -EFAULT; |
2803 | ||
3a7da39d BH |
2804 | /* Most ethtool structures are defined without padding. |
2805 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2806 | */ | |
2807 | switch (ethcmd) { | |
2808 | default: | |
2809 | break; | |
2810 | case ETHTOOL_GRXCLSRLALL: | |
2811 | /* Buffer size is variable */ | |
2812 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2813 | return -EFAULT; | |
2814 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2815 | return -ENOMEM; | |
2816 | buf_size += rule_cnt * sizeof(u32); | |
2817 | /* fall through */ | |
2818 | case ETHTOOL_GRXRINGS: | |
2819 | case ETHTOOL_GRXCLSRLCNT: | |
2820 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2821 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2822 | convert_out = true; |
2823 | /* fall through */ | |
2824 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2825 | buf_size += sizeof(struct ethtool_rxnfc); |
2826 | convert_in = true; | |
2827 | break; | |
2828 | } | |
2829 | ||
2830 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2831 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2832 | |
2833 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2834 | return -EFAULT; |
2835 | ||
3a7da39d BH |
2836 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2837 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2838 | return -EFAULT; |
2839 | ||
3a7da39d | 2840 | if (convert_in) { |
127fe533 | 2841 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2842 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2843 | */ | |
127fe533 AD |
2844 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2845 | sizeof(compat_rxnfc->fs.m_ext) != | |
2846 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2847 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2848 | BUILD_BUG_ON( |
2849 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2850 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2851 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2852 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2853 | ||
2854 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2855 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2856 | (void __user *)rxnfc) || | |
3a7da39d BH |
2857 | copy_in_user(&rxnfc->fs.ring_cookie, |
2858 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2859 | (void __user *)(&rxnfc->fs.location + 1) - |
2860 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2861 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2862 | sizeof(rxnfc->rule_cnt))) | |
2863 | return -EFAULT; | |
2864 | } | |
2865 | ||
2866 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2867 | if (ret) | |
2868 | return ret; | |
2869 | ||
2870 | if (convert_out) { | |
2871 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2872 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2873 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2874 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2875 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2876 | (const void __user *)(&rxnfc->fs.location + 1) - |
2877 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2878 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2879 | sizeof(rxnfc->rule_cnt))) | |
2880 | return -EFAULT; | |
2881 | ||
2882 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2883 | /* As an optimisation, we only copy the actual | |
2884 | * number of rules that the underlying | |
2885 | * function returned. Since Mallory might | |
2886 | * change the rule count in user memory, we | |
2887 | * check that it is less than the rule count | |
2888 | * originally given (as the user buffer size), | |
2889 | * which has been range-checked. | |
2890 | */ | |
2891 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2892 | return -EFAULT; | |
2893 | if (actual_rule_cnt < rule_cnt) | |
2894 | rule_cnt = actual_rule_cnt; | |
2895 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2896 | &rxnfc->rule_locs[0], | |
2897 | rule_cnt * sizeof(u32))) | |
2898 | return -EFAULT; | |
2899 | } | |
2900 | } | |
2901 | ||
2902 | return 0; | |
7a229387 AB |
2903 | } |
2904 | ||
7a50a240 AB |
2905 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2906 | { | |
2907 | void __user *uptr; | |
2908 | compat_uptr_t uptr32; | |
2909 | struct ifreq __user *uifr; | |
2910 | ||
c6d409cf | 2911 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2912 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2913 | return -EFAULT; | |
2914 | ||
2915 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2916 | return -EFAULT; | |
2917 | ||
2918 | uptr = compat_ptr(uptr32); | |
2919 | ||
2920 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2921 | return -EFAULT; | |
2922 | ||
2923 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2924 | } | |
2925 | ||
6b96018b AB |
2926 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2927 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2928 | { |
2929 | struct ifreq kifr; | |
7a229387 AB |
2930 | mm_segment_t old_fs; |
2931 | int err; | |
7a229387 AB |
2932 | |
2933 | switch (cmd) { | |
2934 | case SIOCBONDENSLAVE: | |
2935 | case SIOCBONDRELEASE: | |
2936 | case SIOCBONDSETHWADDR: | |
2937 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2938 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2939 | return -EFAULT; |
2940 | ||
2941 | old_fs = get_fs(); | |
c6d409cf | 2942 | set_fs(KERNEL_DS); |
c3f52ae6 | 2943 | err = dev_ioctl(net, cmd, |
2944 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2945 | set_fs(old_fs); |
7a229387 AB |
2946 | |
2947 | return err; | |
7a229387 | 2948 | default: |
07d106d0 | 2949 | return -ENOIOCTLCMD; |
ccbd6a5a | 2950 | } |
7a229387 AB |
2951 | } |
2952 | ||
590d4693 BH |
2953 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
2954 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, | |
6b96018b | 2955 | struct compat_ifreq __user *u_ifreq32) |
7a229387 AB |
2956 | { |
2957 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2958 | char tmp_buf[IFNAMSIZ]; |
2959 | void __user *data64; | |
2960 | u32 data32; | |
2961 | ||
2962 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2963 | IFNAMSIZ)) | |
2964 | return -EFAULT; | |
417c3522 | 2965 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
7a229387 AB |
2966 | return -EFAULT; |
2967 | data64 = compat_ptr(data32); | |
2968 | ||
2969 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2970 | ||
7a229387 AB |
2971 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
2972 | IFNAMSIZ)) | |
2973 | return -EFAULT; | |
417c3522 | 2974 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
7a229387 AB |
2975 | return -EFAULT; |
2976 | ||
6b96018b | 2977 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2978 | } |
2979 | ||
6b96018b AB |
2980 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2981 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2982 | { |
a2116ed2 | 2983 | struct ifreq __user *uifr; |
7a229387 AB |
2984 | int err; |
2985 | ||
a2116ed2 AB |
2986 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2987 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2988 | return -EFAULT; | |
2989 | ||
2990 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2991 | ||
7a229387 AB |
2992 | if (!err) { |
2993 | switch (cmd) { | |
2994 | case SIOCGIFFLAGS: | |
2995 | case SIOCGIFMETRIC: | |
2996 | case SIOCGIFMTU: | |
2997 | case SIOCGIFMEM: | |
2998 | case SIOCGIFHWADDR: | |
2999 | case SIOCGIFINDEX: | |
3000 | case SIOCGIFADDR: | |
3001 | case SIOCGIFBRDADDR: | |
3002 | case SIOCGIFDSTADDR: | |
3003 | case SIOCGIFNETMASK: | |
fab2532b | 3004 | case SIOCGIFPFLAGS: |
7a229387 | 3005 | case SIOCGIFTXQLEN: |
fab2532b AB |
3006 | case SIOCGMIIPHY: |
3007 | case SIOCGMIIREG: | |
a2116ed2 | 3008 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
3009 | err = -EFAULT; |
3010 | break; | |
3011 | } | |
3012 | } | |
3013 | return err; | |
3014 | } | |
3015 | ||
a2116ed2 AB |
3016 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3017 | struct compat_ifreq __user *uifr32) | |
3018 | { | |
3019 | struct ifreq ifr; | |
3020 | struct compat_ifmap __user *uifmap32; | |
3021 | mm_segment_t old_fs; | |
3022 | int err; | |
3023 | ||
3024 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3025 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3026 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3027 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3028 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3029 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3030 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3031 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3032 | if (err) |
3033 | return -EFAULT; | |
3034 | ||
3035 | old_fs = get_fs(); | |
c6d409cf | 3036 | set_fs(KERNEL_DS); |
c3f52ae6 | 3037 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3038 | set_fs(old_fs); |
a2116ed2 AB |
3039 | |
3040 | if (cmd == SIOCGIFMAP && !err) { | |
3041 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3042 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3043 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3044 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3045 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3046 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3047 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3048 | if (err) |
3049 | err = -EFAULT; | |
3050 | } | |
3051 | return err; | |
3052 | } | |
3053 | ||
7a229387 | 3054 | struct rtentry32 { |
c6d409cf | 3055 | u32 rt_pad1; |
7a229387 AB |
3056 | struct sockaddr rt_dst; /* target address */ |
3057 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3058 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3059 | unsigned short rt_flags; |
3060 | short rt_pad2; | |
3061 | u32 rt_pad3; | |
3062 | unsigned char rt_tos; | |
3063 | unsigned char rt_class; | |
3064 | short rt_pad4; | |
3065 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3066 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3067 | u32 rt_mtu; /* per route MTU/Window */ |
3068 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3069 | unsigned short rt_irtt; /* Initial RTT */ |
3070 | }; | |
3071 | ||
3072 | struct in6_rtmsg32 { | |
3073 | struct in6_addr rtmsg_dst; | |
3074 | struct in6_addr rtmsg_src; | |
3075 | struct in6_addr rtmsg_gateway; | |
3076 | u32 rtmsg_type; | |
3077 | u16 rtmsg_dst_len; | |
3078 | u16 rtmsg_src_len; | |
3079 | u32 rtmsg_metric; | |
3080 | u32 rtmsg_info; | |
3081 | u32 rtmsg_flags; | |
3082 | s32 rtmsg_ifindex; | |
3083 | }; | |
3084 | ||
6b96018b AB |
3085 | static int routing_ioctl(struct net *net, struct socket *sock, |
3086 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3087 | { |
3088 | int ret; | |
3089 | void *r = NULL; | |
3090 | struct in6_rtmsg r6; | |
3091 | struct rtentry r4; | |
3092 | char devname[16]; | |
3093 | u32 rtdev; | |
3094 | mm_segment_t old_fs = get_fs(); | |
3095 | ||
6b96018b AB |
3096 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3097 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3098 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3099 | 3 * sizeof(struct in6_addr)); |
3ddc5b46 MD |
3100 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3101 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3102 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3103 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3104 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3105 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3106 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3107 | |
3108 | r = (void *) &r6; | |
3109 | } else { /* ipv4 */ | |
6b96018b | 3110 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3111 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3112 | 3 * sizeof(struct sockaddr)); |
3ddc5b46 MD |
3113 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
3114 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3115 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3116 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); | |
3117 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3118 | ret |= get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3119 | if (rtdev) { |
c6d409cf | 3120 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3121 | r4.rt_dev = (char __user __force *)devname; |
3122 | devname[15] = 0; | |
7a229387 AB |
3123 | } else |
3124 | r4.rt_dev = NULL; | |
3125 | ||
3126 | r = (void *) &r4; | |
3127 | } | |
3128 | ||
3129 | if (ret) { | |
3130 | ret = -EFAULT; | |
3131 | goto out; | |
3132 | } | |
3133 | ||
c6d409cf | 3134 | set_fs(KERNEL_DS); |
6b96018b | 3135 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3136 | set_fs(old_fs); |
7a229387 AB |
3137 | |
3138 | out: | |
7a229387 AB |
3139 | return ret; |
3140 | } | |
3141 | ||
3142 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3143 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3144 | * use compatible ioctls |
7a229387 | 3145 | */ |
6b96018b | 3146 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3147 | { |
6b96018b | 3148 | compat_ulong_t tmp; |
7a229387 | 3149 | |
6b96018b | 3150 | if (get_user(tmp, argp)) |
7a229387 AB |
3151 | return -EFAULT; |
3152 | if (tmp == BRCTL_GET_VERSION) | |
3153 | return BRCTL_VERSION + 1; | |
3154 | return -EINVAL; | |
3155 | } | |
3156 | ||
6b96018b AB |
3157 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3158 | unsigned int cmd, unsigned long arg) | |
3159 | { | |
3160 | void __user *argp = compat_ptr(arg); | |
3161 | struct sock *sk = sock->sk; | |
3162 | struct net *net = sock_net(sk); | |
7a229387 | 3163 | |
6b96018b | 3164 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693 | 3165 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3166 | |
3167 | switch (cmd) { | |
3168 | case SIOCSIFBR: | |
3169 | case SIOCGIFBR: | |
3170 | return old_bridge_ioctl(argp); | |
3171 | case SIOCGIFNAME: | |
3172 | return dev_ifname32(net, argp); | |
3173 | case SIOCGIFCONF: | |
3174 | return dev_ifconf(net, argp); | |
3175 | case SIOCETHTOOL: | |
3176 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3177 | case SIOCWANDEV: |
3178 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3179 | case SIOCGIFMAP: |
3180 | case SIOCSIFMAP: | |
3181 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3182 | case SIOCBONDENSLAVE: |
3183 | case SIOCBONDRELEASE: | |
3184 | case SIOCBONDSETHWADDR: | |
6b96018b AB |
3185 | case SIOCBONDCHANGEACTIVE: |
3186 | return bond_ioctl(net, cmd, argp); | |
3187 | case SIOCADDRT: | |
3188 | case SIOCDELRT: | |
3189 | return routing_ioctl(net, sock, cmd, argp); | |
3190 | case SIOCGSTAMP: | |
3191 | return do_siocgstamp(net, sock, cmd, argp); | |
3192 | case SIOCGSTAMPNS: | |
3193 | return do_siocgstampns(net, sock, cmd, argp); | |
590d4693 BH |
3194 | case SIOCBONDSLAVEINFOQUERY: |
3195 | case SIOCBONDINFOQUERY: | |
a2116ed2 | 3196 | case SIOCSHWTSTAMP: |
fd468c74 | 3197 | case SIOCGHWTSTAMP: |
590d4693 | 3198 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3199 | |
3200 | case FIOSETOWN: | |
3201 | case SIOCSPGRP: | |
3202 | case FIOGETOWN: | |
3203 | case SIOCGPGRP: | |
3204 | case SIOCBRADDBR: | |
3205 | case SIOCBRDELBR: | |
3206 | case SIOCGIFVLAN: | |
3207 | case SIOCSIFVLAN: | |
3208 | case SIOCADDDLCI: | |
3209 | case SIOCDELDLCI: | |
c62cce2c | 3210 | case SIOCGSKNS: |
6b96018b AB |
3211 | return sock_ioctl(file, cmd, arg); |
3212 | ||
3213 | case SIOCGIFFLAGS: | |
3214 | case SIOCSIFFLAGS: | |
3215 | case SIOCGIFMETRIC: | |
3216 | case SIOCSIFMETRIC: | |
3217 | case SIOCGIFMTU: | |
3218 | case SIOCSIFMTU: | |
3219 | case SIOCGIFMEM: | |
3220 | case SIOCSIFMEM: | |
3221 | case SIOCGIFHWADDR: | |
3222 | case SIOCSIFHWADDR: | |
3223 | case SIOCADDMULTI: | |
3224 | case SIOCDELMULTI: | |
3225 | case SIOCGIFINDEX: | |
6b96018b AB |
3226 | case SIOCGIFADDR: |
3227 | case SIOCSIFADDR: | |
3228 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3229 | case SIOCDIFADDR: |
6b96018b AB |
3230 | case SIOCGIFBRDADDR: |
3231 | case SIOCSIFBRDADDR: | |
3232 | case SIOCGIFDSTADDR: | |
3233 | case SIOCSIFDSTADDR: | |
3234 | case SIOCGIFNETMASK: | |
3235 | case SIOCSIFNETMASK: | |
3236 | case SIOCSIFPFLAGS: | |
3237 | case SIOCGIFPFLAGS: | |
3238 | case SIOCGIFTXQLEN: | |
3239 | case SIOCSIFTXQLEN: | |
3240 | case SIOCBRADDIF: | |
3241 | case SIOCBRDELIF: | |
9177efd3 AB |
3242 | case SIOCSIFNAME: |
3243 | case SIOCGMIIPHY: | |
3244 | case SIOCGMIIREG: | |
3245 | case SIOCSMIIREG: | |
6b96018b | 3246 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3247 | |
6b96018b AB |
3248 | case SIOCSARP: |
3249 | case SIOCGARP: | |
3250 | case SIOCDARP: | |
6b96018b | 3251 | case SIOCATMARK: |
9177efd3 AB |
3252 | return sock_do_ioctl(net, sock, cmd, arg); |
3253 | } | |
3254 | ||
6b96018b AB |
3255 | return -ENOIOCTLCMD; |
3256 | } | |
7a229387 | 3257 | |
95c96174 | 3258 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3259 | unsigned long arg) |
89bbfc95 SP |
3260 | { |
3261 | struct socket *sock = file->private_data; | |
3262 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3263 | struct sock *sk; |
3264 | struct net *net; | |
3265 | ||
3266 | sk = sock->sk; | |
3267 | net = sock_net(sk); | |
89bbfc95 SP |
3268 | |
3269 | if (sock->ops->compat_ioctl) | |
3270 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3271 | ||
87de87d5 DM |
3272 | if (ret == -ENOIOCTLCMD && |
3273 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3274 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3275 | ||
6b96018b AB |
3276 | if (ret == -ENOIOCTLCMD) |
3277 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3278 | ||
89bbfc95 SP |
3279 | return ret; |
3280 | } | |
3281 | #endif | |
3282 | ||
ac5a488e SS |
3283 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3284 | { | |
3285 | return sock->ops->bind(sock, addr, addrlen); | |
3286 | } | |
c6d409cf | 3287 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3288 | |
3289 | int kernel_listen(struct socket *sock, int backlog) | |
3290 | { | |
3291 | return sock->ops->listen(sock, backlog); | |
3292 | } | |
c6d409cf | 3293 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3294 | |
3295 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3296 | { | |
3297 | struct sock *sk = sock->sk; | |
3298 | int err; | |
3299 | ||
3300 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3301 | newsock); | |
3302 | if (err < 0) | |
3303 | goto done; | |
3304 | ||
cdfbabfb | 3305 | err = sock->ops->accept(sock, *newsock, flags, true); |
ac5a488e SS |
3306 | if (err < 0) { |
3307 | sock_release(*newsock); | |
fa8705b0 | 3308 | *newsock = NULL; |
ac5a488e SS |
3309 | goto done; |
3310 | } | |
3311 | ||
3312 | (*newsock)->ops = sock->ops; | |
1b08534e | 3313 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3314 | |
3315 | done: | |
3316 | return err; | |
3317 | } | |
c6d409cf | 3318 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3319 | |
3320 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3321 | int flags) |
ac5a488e SS |
3322 | { |
3323 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3324 | } | |
c6d409cf | 3325 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3326 | |
3327 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3328 | int *addrlen) | |
3329 | { | |
3330 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3331 | } | |
c6d409cf | 3332 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3333 | |
3334 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3335 | int *addrlen) | |
3336 | { | |
3337 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3338 | } | |
c6d409cf | 3339 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3340 | |
3341 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3342 | char *optval, int *optlen) | |
3343 | { | |
3344 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3345 | char __user *uoptval; |
3346 | int __user *uoptlen; | |
ac5a488e SS |
3347 | int err; |
3348 | ||
fb8621bb NK |
3349 | uoptval = (char __user __force *) optval; |
3350 | uoptlen = (int __user __force *) optlen; | |
3351 | ||
ac5a488e SS |
3352 | set_fs(KERNEL_DS); |
3353 | if (level == SOL_SOCKET) | |
fb8621bb | 3354 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3355 | else |
fb8621bb NK |
3356 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3357 | uoptlen); | |
ac5a488e SS |
3358 | set_fs(oldfs); |
3359 | return err; | |
3360 | } | |
c6d409cf | 3361 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3362 | |
3363 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3364 | char *optval, unsigned int optlen) |
ac5a488e SS |
3365 | { |
3366 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3367 | char __user *uoptval; |
ac5a488e SS |
3368 | int err; |
3369 | ||
fb8621bb NK |
3370 | uoptval = (char __user __force *) optval; |
3371 | ||
ac5a488e SS |
3372 | set_fs(KERNEL_DS); |
3373 | if (level == SOL_SOCKET) | |
fb8621bb | 3374 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3375 | else |
fb8621bb | 3376 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3377 | optlen); |
3378 | set_fs(oldfs); | |
3379 | return err; | |
3380 | } | |
c6d409cf | 3381 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3382 | |
3383 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3384 | size_t size, int flags) | |
3385 | { | |
3386 | if (sock->ops->sendpage) | |
3387 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3388 | ||
3389 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3390 | } | |
c6d409cf | 3391 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e | 3392 | |
306b13eb TH |
3393 | int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset, |
3394 | size_t size, int flags) | |
3395 | { | |
3396 | struct socket *sock = sk->sk_socket; | |
3397 | ||
3398 | if (sock->ops->sendpage_locked) | |
3399 | return sock->ops->sendpage_locked(sk, page, offset, size, | |
3400 | flags); | |
3401 | ||
3402 | return sock_no_sendpage_locked(sk, page, offset, size, flags); | |
3403 | } | |
3404 | EXPORT_SYMBOL(kernel_sendpage_locked); | |
3405 | ||
ac5a488e SS |
3406 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
3407 | { | |
3408 | mm_segment_t oldfs = get_fs(); | |
3409 | int err; | |
3410 | ||
3411 | set_fs(KERNEL_DS); | |
3412 | err = sock->ops->ioctl(sock, cmd, arg); | |
3413 | set_fs(oldfs); | |
3414 | ||
3415 | return err; | |
3416 | } | |
c6d409cf | 3417 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3418 | |
91cf45f0 TM |
3419 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3420 | { | |
3421 | return sock->ops->shutdown(sock, how); | |
3422 | } | |
91cf45f0 | 3423 | EXPORT_SYMBOL(kernel_sock_shutdown); |
113c3075 P |
3424 | |
3425 | /* This routine returns the IP overhead imposed by a socket i.e. | |
3426 | * the length of the underlying IP header, depending on whether | |
3427 | * this is an IPv4 or IPv6 socket and the length from IP options turned | |
57240d00 | 3428 | * on at the socket. Assumes that the caller has a lock on the socket. |
113c3075 P |
3429 | */ |
3430 | u32 kernel_sock_ip_overhead(struct sock *sk) | |
3431 | { | |
3432 | struct inet_sock *inet; | |
3433 | struct ip_options_rcu *opt; | |
3434 | u32 overhead = 0; | |
113c3075 P |
3435 | #if IS_ENABLED(CONFIG_IPV6) |
3436 | struct ipv6_pinfo *np; | |
3437 | struct ipv6_txoptions *optv6 = NULL; | |
3438 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
3439 | ||
3440 | if (!sk) | |
3441 | return overhead; | |
3442 | ||
113c3075 P |
3443 | switch (sk->sk_family) { |
3444 | case AF_INET: | |
3445 | inet = inet_sk(sk); | |
3446 | overhead += sizeof(struct iphdr); | |
3447 | opt = rcu_dereference_protected(inet->inet_opt, | |
614d79c0 | 3448 | sock_owned_by_user(sk)); |
113c3075 P |
3449 | if (opt) |
3450 | overhead += opt->opt.optlen; | |
3451 | return overhead; | |
3452 | #if IS_ENABLED(CONFIG_IPV6) | |
3453 | case AF_INET6: | |
3454 | np = inet6_sk(sk); | |
3455 | overhead += sizeof(struct ipv6hdr); | |
3456 | if (np) | |
3457 | optv6 = rcu_dereference_protected(np->opt, | |
614d79c0 | 3458 | sock_owned_by_user(sk)); |
113c3075 P |
3459 | if (optv6) |
3460 | overhead += (optv6->opt_flen + optv6->opt_nflen); | |
3461 | return overhead; | |
3462 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
3463 | default: /* Returns 0 overhead if the socket is not ipv4 or ipv6 */ | |
3464 | return overhead; | |
3465 | } | |
3466 | } | |
3467 | EXPORT_SYMBOL(kernel_sock_ip_overhead); |