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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); |
8e1611e2 AV |
409 | if (unlikely(!path.dentry)) { |
410 | sock_release(sock); | |
28407630 | 411 | return ERR_PTR(-ENOMEM); |
8e1611e2 | 412 | } |
2c48b9c4 | 413 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 414 | |
2c48b9c4 | 415 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
39d8c1b6 | 416 | |
2c48b9c4 | 417 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 418 | &socket_file_ops); |
b5ffe634 | 419 | if (IS_ERR(file)) { |
8e1611e2 | 420 | /* drop dentry, keep inode for a bit */ |
c5ef6035 | 421 | ihold(d_inode(path.dentry)); |
2c48b9c4 | 422 | path_put(&path); |
8e1611e2 AV |
423 | /* ... and now kill it properly */ |
424 | sock_release(sock); | |
39b65252 | 425 | return file; |
cc3808f8 AV |
426 | } |
427 | ||
428 | sock->file = file; | |
77d27200 | 429 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 430 | file->private_data = sock; |
28407630 | 431 | return file; |
39d8c1b6 | 432 | } |
56b31d1c | 433 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 434 | |
56b31d1c | 435 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
436 | { |
437 | struct file *newfile; | |
28407630 | 438 | int fd = get_unused_fd_flags(flags); |
ce4bb04c AV |
439 | if (unlikely(fd < 0)) { |
440 | sock_release(sock); | |
28407630 | 441 | return fd; |
ce4bb04c | 442 | } |
39d8c1b6 | 443 | |
aab174f0 | 444 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 445 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 446 | fd_install(fd, newfile); |
28407630 AV |
447 | return fd; |
448 | } | |
7cbe66b6 | 449 | |
28407630 AV |
450 | put_unused_fd(fd); |
451 | return PTR_ERR(newfile); | |
1da177e4 LT |
452 | } |
453 | ||
406a3c63 | 454 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 455 | { |
6cb153ca BL |
456 | if (file->f_op == &socket_file_ops) |
457 | return file->private_data; /* set in sock_map_fd */ | |
458 | ||
23bb80d2 ED |
459 | *err = -ENOTSOCK; |
460 | return NULL; | |
6cb153ca | 461 | } |
406a3c63 | 462 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 463 | |
1da177e4 | 464 | /** |
c6d409cf | 465 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
466 | * @fd: file handle |
467 | * @err: pointer to an error code return | |
468 | * | |
469 | * The file handle passed in is locked and the socket it is bound | |
241c4667 | 470 | * to is returned. If an error occurs the err pointer is overwritten |
1da177e4 LT |
471 | * with a negative errno code and NULL is returned. The function checks |
472 | * for both invalid handles and passing a handle which is not a socket. | |
473 | * | |
474 | * On a success the socket object pointer is returned. | |
475 | */ | |
476 | ||
477 | struct socket *sockfd_lookup(int fd, int *err) | |
478 | { | |
479 | struct file *file; | |
1da177e4 LT |
480 | struct socket *sock; |
481 | ||
89bddce5 SH |
482 | file = fget(fd); |
483 | if (!file) { | |
1da177e4 LT |
484 | *err = -EBADF; |
485 | return NULL; | |
486 | } | |
89bddce5 | 487 | |
6cb153ca BL |
488 | sock = sock_from_file(file, err); |
489 | if (!sock) | |
1da177e4 | 490 | fput(file); |
6cb153ca BL |
491 | return sock; |
492 | } | |
c6d409cf | 493 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 494 | |
6cb153ca BL |
495 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
496 | { | |
00e188ef | 497 | struct fd f = fdget(fd); |
6cb153ca BL |
498 | struct socket *sock; |
499 | ||
3672558c | 500 | *err = -EBADF; |
00e188ef AV |
501 | if (f.file) { |
502 | sock = sock_from_file(f.file, err); | |
503 | if (likely(sock)) { | |
504 | *fput_needed = f.flags; | |
6cb153ca | 505 | return sock; |
00e188ef AV |
506 | } |
507 | fdput(f); | |
1da177e4 | 508 | } |
6cb153ca | 509 | return NULL; |
1da177e4 LT |
510 | } |
511 | ||
600e1779 MY |
512 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, |
513 | size_t size) | |
514 | { | |
515 | ssize_t len; | |
516 | ssize_t used = 0; | |
517 | ||
c5ef6035 | 518 | len = security_inode_listsecurity(d_inode(dentry), buffer, size); |
600e1779 MY |
519 | if (len < 0) |
520 | return len; | |
521 | used += len; | |
522 | if (buffer) { | |
523 | if (size < used) | |
524 | return -ERANGE; | |
525 | buffer += len; | |
526 | } | |
527 | ||
528 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
529 | used += len; | |
530 | if (buffer) { | |
531 | if (size < used) | |
532 | return -ERANGE; | |
533 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
534 | buffer += len; | |
535 | } | |
536 | ||
537 | return used; | |
538 | } | |
539 | ||
dc647ec8 | 540 | static int sockfs_setattr(struct dentry *dentry, struct iattr *iattr) |
86741ec2 LC |
541 | { |
542 | int err = simple_setattr(dentry, iattr); | |
543 | ||
e1a3a60a | 544 | if (!err && (iattr->ia_valid & ATTR_UID)) { |
86741ec2 LC |
545 | struct socket *sock = SOCKET_I(d_inode(dentry)); |
546 | ||
547 | sock->sk->sk_uid = iattr->ia_uid; | |
548 | } | |
549 | ||
550 | return err; | |
551 | } | |
552 | ||
600e1779 | 553 | static const struct inode_operations sockfs_inode_ops = { |
600e1779 | 554 | .listxattr = sockfs_listxattr, |
86741ec2 | 555 | .setattr = sockfs_setattr, |
600e1779 MY |
556 | }; |
557 | ||
1da177e4 LT |
558 | /** |
559 | * sock_alloc - allocate a socket | |
89bddce5 | 560 | * |
1da177e4 LT |
561 | * Allocate a new inode and socket object. The two are bound together |
562 | * and initialised. The socket is then returned. If we are out of inodes | |
563 | * NULL is returned. | |
564 | */ | |
565 | ||
f4a00aac | 566 | struct socket *sock_alloc(void) |
1da177e4 | 567 | { |
89bddce5 SH |
568 | struct inode *inode; |
569 | struct socket *sock; | |
1da177e4 | 570 | |
a209dfc7 | 571 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
572 | if (!inode) |
573 | return NULL; | |
574 | ||
575 | sock = SOCKET_I(inode); | |
576 | ||
85fe4025 | 577 | inode->i_ino = get_next_ino(); |
89bddce5 | 578 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
579 | inode->i_uid = current_fsuid(); |
580 | inode->i_gid = current_fsgid(); | |
600e1779 | 581 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 582 | |
19e8d69c | 583 | this_cpu_add(sockets_in_use, 1); |
1da177e4 LT |
584 | return sock; |
585 | } | |
f4a00aac | 586 | EXPORT_SYMBOL(sock_alloc); |
1da177e4 | 587 | |
1da177e4 LT |
588 | /** |
589 | * sock_release - close a socket | |
590 | * @sock: socket to close | |
591 | * | |
592 | * The socket is released from the protocol stack if it has a release | |
593 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 594 | * an inode not a file. |
1da177e4 | 595 | */ |
89bddce5 | 596 | |
1da177e4 LT |
597 | void sock_release(struct socket *sock) |
598 | { | |
599 | if (sock->ops) { | |
600 | struct module *owner = sock->ops->owner; | |
601 | ||
602 | sock->ops->release(sock); | |
603 | sock->ops = NULL; | |
604 | module_put(owner); | |
605 | } | |
606 | ||
eaefd110 | 607 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
3410f22e | 608 | pr_err("%s: fasync list not empty!\n", __func__); |
1da177e4 | 609 | |
19e8d69c | 610 | this_cpu_sub(sockets_in_use, 1); |
1da177e4 LT |
611 | if (!sock->file) { |
612 | iput(SOCK_INODE(sock)); | |
613 | return; | |
614 | } | |
89bddce5 | 615 | sock->file = NULL; |
1da177e4 | 616 | } |
c6d409cf | 617 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 618 | |
c14ac945 | 619 | void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags) |
20d49473 | 620 | { |
140c55d4 ED |
621 | u8 flags = *tx_flags; |
622 | ||
c14ac945 | 623 | if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
140c55d4 ED |
624 | flags |= SKBTX_HW_TSTAMP; |
625 | ||
c14ac945 | 626 | if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
140c55d4 ED |
627 | flags |= SKBTX_SW_TSTAMP; |
628 | ||
c14ac945 | 629 | if (tsflags & SOF_TIMESTAMPING_TX_SCHED) |
140c55d4 ED |
630 | flags |= SKBTX_SCHED_TSTAMP; |
631 | ||
140c55d4 | 632 | *tx_flags = flags; |
20d49473 | 633 | } |
67cc0d40 | 634 | EXPORT_SYMBOL(__sock_tx_timestamp); |
20d49473 | 635 | |
d8725c86 | 636 | static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg) |
1da177e4 | 637 | { |
01e97e65 | 638 | int ret = sock->ops->sendmsg(sock, msg, msg_data_left(msg)); |
d8725c86 AV |
639 | BUG_ON(ret == -EIOCBQUEUED); |
640 | return ret; | |
1da177e4 LT |
641 | } |
642 | ||
d8725c86 | 643 | int sock_sendmsg(struct socket *sock, struct msghdr *msg) |
228e548e | 644 | { |
d8725c86 | 645 | int err = security_socket_sendmsg(sock, msg, |
01e97e65 | 646 | msg_data_left(msg)); |
228e548e | 647 | |
d8725c86 | 648 | return err ?: sock_sendmsg_nosec(sock, msg); |
0cf00c6f | 649 | } |
c6d409cf | 650 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 LT |
651 | |
652 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
653 | struct kvec *vec, size_t num, size_t size) | |
654 | { | |
6aa24814 | 655 | iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size); |
d8725c86 | 656 | return sock_sendmsg(sock, msg); |
1da177e4 | 657 | } |
c6d409cf | 658 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 659 | |
306b13eb TH |
660 | int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg, |
661 | struct kvec *vec, size_t num, size_t size) | |
662 | { | |
663 | struct socket *sock = sk->sk_socket; | |
664 | ||
665 | if (!sock->ops->sendmsg_locked) | |
db5980d8 | 666 | return sock_no_sendmsg_locked(sk, msg, size); |
306b13eb TH |
667 | |
668 | iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size); | |
669 | ||
670 | return sock->ops->sendmsg_locked(sk, msg, msg_data_left(msg)); | |
671 | } | |
672 | EXPORT_SYMBOL(kernel_sendmsg_locked); | |
673 | ||
8605330a SHY |
674 | static bool skb_is_err_queue(const struct sk_buff *skb) |
675 | { | |
676 | /* pkt_type of skbs enqueued on the error queue are set to | |
677 | * PACKET_OUTGOING in skb_set_err_queue(). This is only safe to do | |
678 | * in recvmsg, since skbs received on a local socket will never | |
679 | * have a pkt_type of PACKET_OUTGOING. | |
680 | */ | |
681 | return skb->pkt_type == PACKET_OUTGOING; | |
682 | } | |
683 | ||
b50a5c70 ML |
684 | /* On transmit, software and hardware timestamps are returned independently. |
685 | * As the two skb clones share the hardware timestamp, which may be updated | |
686 | * before the software timestamp is received, a hardware TX timestamp may be | |
687 | * returned only if there is no software TX timestamp. Ignore false software | |
688 | * timestamps, which may be made in the __sock_recv_timestamp() call when the | |
689 | * option SO_TIMESTAMP(NS) is enabled on the socket, even when the skb has a | |
690 | * hardware timestamp. | |
691 | */ | |
692 | static bool skb_is_swtx_tstamp(const struct sk_buff *skb, int false_tstamp) | |
693 | { | |
694 | return skb->tstamp && !false_tstamp && skb_is_err_queue(skb); | |
695 | } | |
696 | ||
aad9c8c4 ML |
697 | static void put_ts_pktinfo(struct msghdr *msg, struct sk_buff *skb) |
698 | { | |
699 | struct scm_ts_pktinfo ts_pktinfo; | |
700 | struct net_device *orig_dev; | |
701 | ||
702 | if (!skb_mac_header_was_set(skb)) | |
703 | return; | |
704 | ||
705 | memset(&ts_pktinfo, 0, sizeof(ts_pktinfo)); | |
706 | ||
707 | rcu_read_lock(); | |
708 | orig_dev = dev_get_by_napi_id(skb_napi_id(skb)); | |
709 | if (orig_dev) | |
710 | ts_pktinfo.if_index = orig_dev->ifindex; | |
711 | rcu_read_unlock(); | |
712 | ||
713 | ts_pktinfo.pkt_length = skb->len - skb_mac_offset(skb); | |
714 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_PKTINFO, | |
715 | sizeof(ts_pktinfo), &ts_pktinfo); | |
716 | } | |
717 | ||
92f37fd2 ED |
718 | /* |
719 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
720 | */ | |
721 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
722 | struct sk_buff *skb) | |
723 | { | |
20d49473 | 724 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
f24b9be5 | 725 | struct scm_timestamping tss; |
b50a5c70 | 726 | int empty = 1, false_tstamp = 0; |
20d49473 PO |
727 | struct skb_shared_hwtstamps *shhwtstamps = |
728 | skb_hwtstamps(skb); | |
729 | ||
730 | /* Race occurred between timestamp enabling and packet | |
731 | receiving. Fill in the current time for now. */ | |
b50a5c70 | 732 | if (need_software_tstamp && skb->tstamp == 0) { |
20d49473 | 733 | __net_timestamp(skb); |
b50a5c70 ML |
734 | false_tstamp = 1; |
735 | } | |
20d49473 PO |
736 | |
737 | if (need_software_tstamp) { | |
738 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
739 | struct timeval tv; | |
740 | skb_get_timestamp(skb, &tv); | |
741 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
742 | sizeof(tv), &tv); | |
743 | } else { | |
f24b9be5 WB |
744 | struct timespec ts; |
745 | skb_get_timestampns(skb, &ts); | |
20d49473 | 746 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
f24b9be5 | 747 | sizeof(ts), &ts); |
20d49473 PO |
748 | } |
749 | } | |
750 | ||
f24b9be5 | 751 | memset(&tss, 0, sizeof(tss)); |
c199105d | 752 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
f24b9be5 | 753 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
20d49473 | 754 | empty = 0; |
4d276eb6 | 755 | if (shhwtstamps && |
b9f40e21 | 756 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
b50a5c70 | 757 | !skb_is_swtx_tstamp(skb, false_tstamp) && |
aad9c8c4 | 758 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) { |
4d276eb6 | 759 | empty = 0; |
aad9c8c4 ML |
760 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_OPT_PKTINFO) && |
761 | !skb_is_err_queue(skb)) | |
762 | put_ts_pktinfo(msg, skb); | |
763 | } | |
1c885808 | 764 | if (!empty) { |
20d49473 | 765 | put_cmsg(msg, SOL_SOCKET, |
f24b9be5 | 766 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
1c885808 | 767 | |
8605330a | 768 | if (skb_is_err_queue(skb) && skb->len && |
4ef1b286 | 769 | SKB_EXT_ERR(skb)->opt_stats) |
1c885808 FY |
770 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_OPT_STATS, |
771 | skb->len, skb->data); | |
772 | } | |
92f37fd2 | 773 | } |
7c81fd8b ACM |
774 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
775 | ||
6e3e939f JB |
776 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
777 | struct sk_buff *skb) | |
778 | { | |
779 | int ack; | |
780 | ||
781 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
782 | return; | |
783 | if (!skb->wifi_acked_valid) | |
784 | return; | |
785 | ||
786 | ack = skb->wifi_acked; | |
787 | ||
788 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
789 | } | |
790 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
791 | ||
11165f14 | 792 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
793 | struct sk_buff *skb) | |
3b885787 | 794 | { |
744d5a3e | 795 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount) |
3b885787 | 796 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
744d5a3e | 797 | sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
3b885787 NH |
798 | } |
799 | ||
767dd033 | 800 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
801 | struct sk_buff *skb) |
802 | { | |
803 | sock_recv_timestamp(msg, sk, skb); | |
804 | sock_recv_drops(msg, sk, skb); | |
805 | } | |
767dd033 | 806 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 807 | |
1b784140 | 808 | static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
2da62906 | 809 | int flags) |
1da177e4 | 810 | { |
2da62906 | 811 | return sock->ops->recvmsg(sock, msg, msg_data_left(msg), flags); |
1da177e4 LT |
812 | } |
813 | ||
2da62906 | 814 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags) |
a2e27255 | 815 | { |
2da62906 | 816 | int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags); |
a2e27255 | 817 | |
2da62906 | 818 | return err ?: sock_recvmsg_nosec(sock, msg, flags); |
1da177e4 | 819 | } |
c6d409cf | 820 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 821 | |
c1249c0a ML |
822 | /** |
823 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
824 | * @sock: The socket to receive the message from | |
825 | * @msg: Received message | |
826 | * @vec: Input s/g array for message data | |
827 | * @num: Size of input s/g array | |
828 | * @size: Number of bytes to read | |
829 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
830 | * | |
831 | * On return the msg structure contains the scatter/gather array passed in the | |
832 | * vec argument. The array is modified so that it consists of the unfilled | |
833 | * portion of the original array. | |
834 | * | |
835 | * The returned value is the total number of bytes received, or an error. | |
836 | */ | |
89bddce5 SH |
837 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
838 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
839 | { |
840 | mm_segment_t oldfs = get_fs(); | |
841 | int result; | |
842 | ||
6aa24814 | 843 | iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size); |
1da177e4 | 844 | set_fs(KERNEL_DS); |
2da62906 | 845 | result = sock_recvmsg(sock, msg, flags); |
1da177e4 LT |
846 | set_fs(oldfs); |
847 | return result; | |
848 | } | |
c6d409cf | 849 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 | 850 | |
ce1d4d3e CH |
851 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
852 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 853 | { |
1da177e4 LT |
854 | struct socket *sock; |
855 | int flags; | |
856 | ||
ce1d4d3e CH |
857 | sock = file->private_data; |
858 | ||
35f9c09f ED |
859 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
860 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
861 | flags |= more; | |
ce1d4d3e | 862 | |
e6949583 | 863 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 864 | } |
1da177e4 | 865 | |
9c55e01c | 866 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 867 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
868 | unsigned int flags) |
869 | { | |
870 | struct socket *sock = file->private_data; | |
871 | ||
997b37da RDC |
872 | if (unlikely(!sock->ops->splice_read)) |
873 | return -EINVAL; | |
874 | ||
9c55e01c JA |
875 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
876 | } | |
877 | ||
8ae5e030 | 878 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to) |
ce1d4d3e | 879 | { |
6d652330 AV |
880 | struct file *file = iocb->ki_filp; |
881 | struct socket *sock = file->private_data; | |
0345f931 | 882 | struct msghdr msg = {.msg_iter = *to, |
883 | .msg_iocb = iocb}; | |
8ae5e030 | 884 | ssize_t res; |
ce1d4d3e | 885 | |
8ae5e030 AV |
886 | if (file->f_flags & O_NONBLOCK) |
887 | msg.msg_flags = MSG_DONTWAIT; | |
888 | ||
889 | if (iocb->ki_pos != 0) | |
1da177e4 | 890 | return -ESPIPE; |
027445c3 | 891 | |
66ee59af | 892 | if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
1da177e4 LT |
893 | return 0; |
894 | ||
2da62906 | 895 | res = sock_recvmsg(sock, &msg, msg.msg_flags); |
8ae5e030 AV |
896 | *to = msg.msg_iter; |
897 | return res; | |
1da177e4 LT |
898 | } |
899 | ||
8ae5e030 | 900 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) |
ce1d4d3e | 901 | { |
6d652330 AV |
902 | struct file *file = iocb->ki_filp; |
903 | struct socket *sock = file->private_data; | |
0345f931 | 904 | struct msghdr msg = {.msg_iter = *from, |
905 | .msg_iocb = iocb}; | |
8ae5e030 | 906 | ssize_t res; |
1da177e4 | 907 | |
8ae5e030 | 908 | if (iocb->ki_pos != 0) |
ce1d4d3e | 909 | return -ESPIPE; |
027445c3 | 910 | |
8ae5e030 AV |
911 | if (file->f_flags & O_NONBLOCK) |
912 | msg.msg_flags = MSG_DONTWAIT; | |
913 | ||
6d652330 AV |
914 | if (sock->type == SOCK_SEQPACKET) |
915 | msg.msg_flags |= MSG_EOR; | |
916 | ||
d8725c86 | 917 | res = sock_sendmsg(sock, &msg); |
8ae5e030 AV |
918 | *from = msg.msg_iter; |
919 | return res; | |
1da177e4 LT |
920 | } |
921 | ||
1da177e4 LT |
922 | /* |
923 | * Atomic setting of ioctl hooks to avoid race | |
924 | * with module unload. | |
925 | */ | |
926 | ||
4a3e2f71 | 927 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 928 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 929 | |
881d966b | 930 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 931 | { |
4a3e2f71 | 932 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 933 | br_ioctl_hook = hook; |
4a3e2f71 | 934 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
935 | } |
936 | EXPORT_SYMBOL(brioctl_set); | |
937 | ||
4a3e2f71 | 938 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 939 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 940 | |
881d966b | 941 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 942 | { |
4a3e2f71 | 943 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 944 | vlan_ioctl_hook = hook; |
4a3e2f71 | 945 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
946 | } |
947 | EXPORT_SYMBOL(vlan_ioctl_set); | |
948 | ||
4a3e2f71 | 949 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 950 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 951 | |
89bddce5 | 952 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 953 | { |
4a3e2f71 | 954 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 955 | dlci_ioctl_hook = hook; |
4a3e2f71 | 956 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
957 | } |
958 | EXPORT_SYMBOL(dlci_ioctl_set); | |
959 | ||
6b96018b AB |
960 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
961 | unsigned int cmd, unsigned long arg) | |
962 | { | |
963 | int err; | |
964 | void __user *argp = (void __user *)arg; | |
965 | ||
966 | err = sock->ops->ioctl(sock, cmd, arg); | |
967 | ||
968 | /* | |
969 | * If this ioctl is unknown try to hand it down | |
970 | * to the NIC driver. | |
971 | */ | |
972 | if (err == -ENOIOCTLCMD) | |
973 | err = dev_ioctl(net, cmd, argp); | |
974 | ||
975 | return err; | |
976 | } | |
977 | ||
1da177e4 LT |
978 | /* |
979 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
980 | * what to do with it - that's up to the protocol still. | |
981 | */ | |
982 | ||
c62cce2c AV |
983 | static struct ns_common *get_net_ns(struct ns_common *ns) |
984 | { | |
985 | return &get_net(container_of(ns, struct net, ns))->ns; | |
986 | } | |
987 | ||
1da177e4 LT |
988 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
989 | { | |
990 | struct socket *sock; | |
881d966b | 991 | struct sock *sk; |
1da177e4 LT |
992 | void __user *argp = (void __user *)arg; |
993 | int pid, err; | |
881d966b | 994 | struct net *net; |
1da177e4 | 995 | |
b69aee04 | 996 | sock = file->private_data; |
881d966b | 997 | sk = sock->sk; |
3b1e0a65 | 998 | net = sock_net(sk); |
1da177e4 | 999 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 1000 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1001 | } else |
3d23e349 | 1002 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1003 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 1004 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 1005 | } else |
3d23e349 | 1006 | #endif |
89bddce5 | 1007 | switch (cmd) { |
1da177e4 LT |
1008 | case FIOSETOWN: |
1009 | case SIOCSPGRP: | |
1010 | err = -EFAULT; | |
1011 | if (get_user(pid, (int __user *)argp)) | |
1012 | break; | |
393cc3f5 | 1013 | err = f_setown(sock->file, pid, 1); |
1da177e4 LT |
1014 | break; |
1015 | case FIOGETOWN: | |
1016 | case SIOCGPGRP: | |
609d7fa9 | 1017 | err = put_user(f_getown(sock->file), |
89bddce5 | 1018 | (int __user *)argp); |
1da177e4 LT |
1019 | break; |
1020 | case SIOCGIFBR: | |
1021 | case SIOCSIFBR: | |
1022 | case SIOCBRADDBR: | |
1023 | case SIOCBRDELBR: | |
1024 | err = -ENOPKG; | |
1025 | if (!br_ioctl_hook) | |
1026 | request_module("bridge"); | |
1027 | ||
4a3e2f71 | 1028 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1029 | if (br_ioctl_hook) |
881d966b | 1030 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1031 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1032 | break; |
1033 | case SIOCGIFVLAN: | |
1034 | case SIOCSIFVLAN: | |
1035 | err = -ENOPKG; | |
1036 | if (!vlan_ioctl_hook) | |
1037 | request_module("8021q"); | |
1038 | ||
4a3e2f71 | 1039 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1040 | if (vlan_ioctl_hook) |
881d966b | 1041 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1042 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1043 | break; |
1da177e4 LT |
1044 | case SIOCADDDLCI: |
1045 | case SIOCDELDLCI: | |
1046 | err = -ENOPKG; | |
1047 | if (!dlci_ioctl_hook) | |
1048 | request_module("dlci"); | |
1049 | ||
7512cbf6 PE |
1050 | mutex_lock(&dlci_ioctl_mutex); |
1051 | if (dlci_ioctl_hook) | |
1da177e4 | 1052 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1053 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 | 1054 | break; |
c62cce2c AV |
1055 | case SIOCGSKNS: |
1056 | err = -EPERM; | |
1057 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1058 | break; | |
1059 | ||
1060 | err = open_related_ns(&net->ns, get_net_ns); | |
1061 | break; | |
1da177e4 | 1062 | default: |
6b96018b | 1063 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1064 | break; |
89bddce5 | 1065 | } |
1da177e4 LT |
1066 | return err; |
1067 | } | |
1068 | ||
1069 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1070 | { | |
1071 | int err; | |
1072 | struct socket *sock = NULL; | |
89bddce5 | 1073 | |
1da177e4 LT |
1074 | err = security_socket_create(family, type, protocol, 1); |
1075 | if (err) | |
1076 | goto out; | |
1077 | ||
1078 | sock = sock_alloc(); | |
1079 | if (!sock) { | |
1080 | err = -ENOMEM; | |
1081 | goto out; | |
1082 | } | |
1083 | ||
1da177e4 | 1084 | sock->type = type; |
7420ed23 VY |
1085 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1086 | if (err) | |
1087 | goto out_release; | |
1088 | ||
1da177e4 LT |
1089 | out: |
1090 | *res = sock; | |
1091 | return err; | |
7420ed23 VY |
1092 | out_release: |
1093 | sock_release(sock); | |
1094 | sock = NULL; | |
1095 | goto out; | |
1da177e4 | 1096 | } |
c6d409cf | 1097 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1098 | |
1099 | /* No kernel lock held - perfect */ | |
89bddce5 | 1100 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 | 1101 | { |
cbf55001 | 1102 | unsigned int busy_flag = 0; |
1da177e4 LT |
1103 | struct socket *sock; |
1104 | ||
1105 | /* | |
89bddce5 | 1106 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1107 | */ |
b69aee04 | 1108 | sock = file->private_data; |
2d48d67f | 1109 | |
cbf55001 | 1110 | if (sk_can_busy_loop(sock->sk)) { |
2d48d67f | 1111 | /* this socket can poll_ll so tell the system call */ |
cbf55001 | 1112 | busy_flag = POLL_BUSY_LOOP; |
2d48d67f ET |
1113 | |
1114 | /* once, only if requested by syscall */ | |
cbf55001 ET |
1115 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
1116 | sk_busy_loop(sock->sk, 1); | |
2d48d67f ET |
1117 | } |
1118 | ||
cbf55001 | 1119 | return busy_flag | sock->ops->poll(file, sock, wait); |
1da177e4 LT |
1120 | } |
1121 | ||
89bddce5 | 1122 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1123 | { |
b69aee04 | 1124 | struct socket *sock = file->private_data; |
1da177e4 LT |
1125 | |
1126 | return sock->ops->mmap(file, sock, vma); | |
1127 | } | |
1128 | ||
20380731 | 1129 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1130 | { |
1da177e4 LT |
1131 | sock_release(SOCKET_I(inode)); |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | /* | |
1136 | * Update the socket async list | |
1137 | * | |
1138 | * Fasync_list locking strategy. | |
1139 | * | |
1140 | * 1. fasync_list is modified only under process context socket lock | |
1141 | * i.e. under semaphore. | |
1142 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1143 | * or under socket lock |
1da177e4 LT |
1144 | */ |
1145 | ||
1146 | static int sock_fasync(int fd, struct file *filp, int on) | |
1147 | { | |
989a2979 ED |
1148 | struct socket *sock = filp->private_data; |
1149 | struct sock *sk = sock->sk; | |
eaefd110 | 1150 | struct socket_wq *wq; |
1da177e4 | 1151 | |
989a2979 | 1152 | if (sk == NULL) |
1da177e4 | 1153 | return -EINVAL; |
1da177e4 LT |
1154 | |
1155 | lock_sock(sk); | |
1e1d04e6 | 1156 | wq = rcu_dereference_protected(sock->wq, lockdep_sock_is_held(sk)); |
eaefd110 | 1157 | fasync_helper(fd, filp, on, &wq->fasync_list); |
1da177e4 | 1158 | |
eaefd110 | 1159 | if (!wq->fasync_list) |
989a2979 ED |
1160 | sock_reset_flag(sk, SOCK_FASYNC); |
1161 | else | |
bcdce719 | 1162 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1163 | |
989a2979 | 1164 | release_sock(sk); |
1da177e4 LT |
1165 | return 0; |
1166 | } | |
1167 | ||
ceb5d58b | 1168 | /* This function may be called only under rcu_lock */ |
1da177e4 | 1169 | |
ceb5d58b | 1170 | int sock_wake_async(struct socket_wq *wq, int how, int band) |
1da177e4 | 1171 | { |
ceb5d58b | 1172 | if (!wq || !wq->fasync_list) |
1da177e4 | 1173 | return -1; |
ceb5d58b | 1174 | |
89bddce5 | 1175 | switch (how) { |
8d8ad9d7 | 1176 | case SOCK_WAKE_WAITD: |
ceb5d58b | 1177 | if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags)) |
1da177e4 LT |
1178 | break; |
1179 | goto call_kill; | |
8d8ad9d7 | 1180 | case SOCK_WAKE_SPACE: |
ceb5d58b | 1181 | if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags)) |
1da177e4 LT |
1182 | break; |
1183 | /* fall through */ | |
8d8ad9d7 | 1184 | case SOCK_WAKE_IO: |
89bddce5 | 1185 | call_kill: |
43815482 | 1186 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1187 | break; |
8d8ad9d7 | 1188 | case SOCK_WAKE_URG: |
43815482 | 1189 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1190 | } |
ceb5d58b | 1191 | |
1da177e4 LT |
1192 | return 0; |
1193 | } | |
c6d409cf | 1194 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1195 | |
721db93a | 1196 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1197 | struct socket **res, int kern) |
1da177e4 LT |
1198 | { |
1199 | int err; | |
1200 | struct socket *sock; | |
55737fda | 1201 | const struct net_proto_family *pf; |
1da177e4 LT |
1202 | |
1203 | /* | |
89bddce5 | 1204 | * Check protocol is in range |
1da177e4 LT |
1205 | */ |
1206 | if (family < 0 || family >= NPROTO) | |
1207 | return -EAFNOSUPPORT; | |
1208 | if (type < 0 || type >= SOCK_MAX) | |
1209 | return -EINVAL; | |
1210 | ||
1211 | /* Compatibility. | |
1212 | ||
1213 | This uglymoron is moved from INET layer to here to avoid | |
1214 | deadlock in module load. | |
1215 | */ | |
1216 | if (family == PF_INET && type == SOCK_PACKET) { | |
f3c98690 | 1217 | pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1218 | current->comm); | |
1da177e4 LT |
1219 | family = PF_PACKET; |
1220 | } | |
1221 | ||
1222 | err = security_socket_create(family, type, protocol, kern); | |
1223 | if (err) | |
1224 | return err; | |
89bddce5 | 1225 | |
55737fda SH |
1226 | /* |
1227 | * Allocate the socket and allow the family to set things up. if | |
1228 | * the protocol is 0, the family is instructed to select an appropriate | |
1229 | * default. | |
1230 | */ | |
1231 | sock = sock_alloc(); | |
1232 | if (!sock) { | |
e87cc472 | 1233 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1234 | return -ENFILE; /* Not exactly a match, but its the |
1235 | closest posix thing */ | |
1236 | } | |
1237 | ||
1238 | sock->type = type; | |
1239 | ||
95a5afca | 1240 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1241 | /* Attempt to load a protocol module if the find failed. |
1242 | * | |
1243 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1244 | * requested real, full-featured networking support upon configuration. |
1245 | * Otherwise module support will break! | |
1246 | */ | |
190683a9 | 1247 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1248 | request_module("net-pf-%d", family); |
1da177e4 LT |
1249 | #endif |
1250 | ||
55737fda SH |
1251 | rcu_read_lock(); |
1252 | pf = rcu_dereference(net_families[family]); | |
1253 | err = -EAFNOSUPPORT; | |
1254 | if (!pf) | |
1255 | goto out_release; | |
1da177e4 LT |
1256 | |
1257 | /* | |
1258 | * We will call the ->create function, that possibly is in a loadable | |
1259 | * module, so we have to bump that loadable module refcnt first. | |
1260 | */ | |
55737fda | 1261 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1262 | goto out_release; |
1263 | ||
55737fda SH |
1264 | /* Now protected by module ref count */ |
1265 | rcu_read_unlock(); | |
1266 | ||
3f378b68 | 1267 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1268 | if (err < 0) |
1da177e4 | 1269 | goto out_module_put; |
a79af59e | 1270 | |
1da177e4 LT |
1271 | /* |
1272 | * Now to bump the refcnt of the [loadable] module that owns this | |
1273 | * socket at sock_release time we decrement its refcnt. | |
1274 | */ | |
55737fda SH |
1275 | if (!try_module_get(sock->ops->owner)) |
1276 | goto out_module_busy; | |
1277 | ||
1da177e4 LT |
1278 | /* |
1279 | * Now that we're done with the ->create function, the [loadable] | |
1280 | * module can have its refcnt decremented | |
1281 | */ | |
55737fda | 1282 | module_put(pf->owner); |
7420ed23 VY |
1283 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1284 | if (err) | |
3b185525 | 1285 | goto out_sock_release; |
55737fda | 1286 | *res = sock; |
1da177e4 | 1287 | |
55737fda SH |
1288 | return 0; |
1289 | ||
1290 | out_module_busy: | |
1291 | err = -EAFNOSUPPORT; | |
1da177e4 | 1292 | out_module_put: |
55737fda SH |
1293 | sock->ops = NULL; |
1294 | module_put(pf->owner); | |
1295 | out_sock_release: | |
1da177e4 | 1296 | sock_release(sock); |
55737fda SH |
1297 | return err; |
1298 | ||
1299 | out_release: | |
1300 | rcu_read_unlock(); | |
1301 | goto out_sock_release; | |
1da177e4 | 1302 | } |
721db93a | 1303 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1304 | |
1305 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1306 | { | |
1b8d7ae4 | 1307 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1308 | } |
c6d409cf | 1309 | EXPORT_SYMBOL(sock_create); |
1da177e4 | 1310 | |
eeb1bd5c | 1311 | int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res) |
1da177e4 | 1312 | { |
eeb1bd5c | 1313 | return __sock_create(net, family, type, protocol, res, 1); |
1da177e4 | 1314 | } |
c6d409cf | 1315 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1316 | |
3e0fa65f | 1317 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1318 | { |
1319 | int retval; | |
1320 | struct socket *sock; | |
a677a039 UD |
1321 | int flags; |
1322 | ||
e38b36f3 UD |
1323 | /* Check the SOCK_* constants for consistency. */ |
1324 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1325 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1326 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1327 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1328 | ||
a677a039 | 1329 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1330 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1331 | return -EINVAL; |
1332 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1333 | |
aaca0bdc UD |
1334 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1335 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1336 | ||
1da177e4 LT |
1337 | retval = sock_create(family, type, protocol, &sock); |
1338 | if (retval < 0) | |
8e1611e2 | 1339 | return retval; |
1da177e4 | 1340 | |
8e1611e2 | 1341 | return sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1342 | } |
1343 | ||
1344 | /* | |
1345 | * Create a pair of connected sockets. | |
1346 | */ | |
1347 | ||
3e0fa65f HC |
1348 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1349 | int __user *, usockvec) | |
1da177e4 LT |
1350 | { |
1351 | struct socket *sock1, *sock2; | |
1352 | int fd1, fd2, err; | |
db349509 | 1353 | struct file *newfile1, *newfile2; |
a677a039 UD |
1354 | int flags; |
1355 | ||
1356 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1357 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1358 | return -EINVAL; |
1359 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1360 | |
aaca0bdc UD |
1361 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1362 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1363 | ||
016a266b AV |
1364 | /* |
1365 | * reserve descriptors and make sure we won't fail | |
1366 | * to return them to userland. | |
1367 | */ | |
1368 | fd1 = get_unused_fd_flags(flags); | |
1369 | if (unlikely(fd1 < 0)) | |
1370 | return fd1; | |
1371 | ||
1372 | fd2 = get_unused_fd_flags(flags); | |
1373 | if (unlikely(fd2 < 0)) { | |
1374 | put_unused_fd(fd1); | |
1375 | return fd2; | |
1376 | } | |
1377 | ||
1378 | err = put_user(fd1, &usockvec[0]); | |
1379 | if (err) | |
1380 | goto out; | |
1381 | ||
1382 | err = put_user(fd2, &usockvec[1]); | |
1383 | if (err) | |
1384 | goto out; | |
1385 | ||
1da177e4 LT |
1386 | /* |
1387 | * Obtain the first socket and check if the underlying protocol | |
1388 | * supports the socketpair call. | |
1389 | */ | |
1390 | ||
1391 | err = sock_create(family, type, protocol, &sock1); | |
016a266b | 1392 | if (unlikely(err < 0)) |
1da177e4 LT |
1393 | goto out; |
1394 | ||
1395 | err = sock_create(family, type, protocol, &sock2); | |
016a266b AV |
1396 | if (unlikely(err < 0)) { |
1397 | sock_release(sock1); | |
1398 | goto out; | |
bf3c23d1 | 1399 | } |
d73aa286 | 1400 | |
016a266b AV |
1401 | err = sock1->ops->socketpair(sock1, sock2); |
1402 | if (unlikely(err < 0)) { | |
1403 | sock_release(sock2); | |
1404 | sock_release(sock1); | |
1405 | goto out; | |
28407630 AV |
1406 | } |
1407 | ||
aab174f0 | 1408 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
b5ffe634 | 1409 | if (IS_ERR(newfile1)) { |
28407630 | 1410 | err = PTR_ERR(newfile1); |
016a266b AV |
1411 | sock_release(sock2); |
1412 | goto out; | |
28407630 AV |
1413 | } |
1414 | ||
aab174f0 | 1415 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1416 | if (IS_ERR(newfile2)) { |
1417 | err = PTR_ERR(newfile2); | |
016a266b AV |
1418 | fput(newfile1); |
1419 | goto out; | |
db349509 AV |
1420 | } |
1421 | ||
157cf649 | 1422 | audit_fd_pair(fd1, fd2); |
d73aa286 | 1423 | |
db349509 AV |
1424 | fd_install(fd1, newfile1); |
1425 | fd_install(fd2, newfile2); | |
d73aa286 | 1426 | return 0; |
1da177e4 | 1427 | |
016a266b | 1428 | out: |
d73aa286 | 1429 | put_unused_fd(fd2); |
d73aa286 | 1430 | put_unused_fd(fd1); |
1da177e4 LT |
1431 | return err; |
1432 | } | |
1433 | ||
1da177e4 LT |
1434 | /* |
1435 | * Bind a name to a socket. Nothing much to do here since it's | |
1436 | * the protocol's responsibility to handle the local address. | |
1437 | * | |
1438 | * We move the socket address to kernel space before we call | |
1439 | * the protocol layer (having also checked the address is ok). | |
1440 | */ | |
1441 | ||
20f37034 | 1442 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1443 | { |
1444 | struct socket *sock; | |
230b1839 | 1445 | struct sockaddr_storage address; |
6cb153ca | 1446 | int err, fput_needed; |
1da177e4 | 1447 | |
89bddce5 | 1448 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1449 | if (sock) { |
43db362d | 1450 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1451 | if (err >= 0) { |
1452 | err = security_socket_bind(sock, | |
230b1839 | 1453 | (struct sockaddr *)&address, |
89bddce5 | 1454 | addrlen); |
6cb153ca BL |
1455 | if (!err) |
1456 | err = sock->ops->bind(sock, | |
89bddce5 | 1457 | (struct sockaddr *) |
230b1839 | 1458 | &address, addrlen); |
1da177e4 | 1459 | } |
6cb153ca | 1460 | fput_light(sock->file, fput_needed); |
89bddce5 | 1461 | } |
1da177e4 LT |
1462 | return err; |
1463 | } | |
1464 | ||
1da177e4 LT |
1465 | /* |
1466 | * Perform a listen. Basically, we allow the protocol to do anything | |
1467 | * necessary for a listen, and if that works, we mark the socket as | |
1468 | * ready for listening. | |
1469 | */ | |
1470 | ||
3e0fa65f | 1471 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1472 | { |
1473 | struct socket *sock; | |
6cb153ca | 1474 | int err, fput_needed; |
b8e1f9b5 | 1475 | int somaxconn; |
89bddce5 SH |
1476 | |
1477 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1478 | if (sock) { | |
8efa6e93 | 1479 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1480 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1481 | backlog = somaxconn; |
1da177e4 LT |
1482 | |
1483 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1484 | if (!err) |
1485 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1486 | |
6cb153ca | 1487 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1488 | } |
1489 | return err; | |
1490 | } | |
1491 | ||
1da177e4 LT |
1492 | /* |
1493 | * For accept, we attempt to create a new socket, set up the link | |
1494 | * with the client, wake up the client, then return the new | |
1495 | * connected fd. We collect the address of the connector in kernel | |
1496 | * space and move it to user at the very end. This is unclean because | |
1497 | * we open the socket then return an error. | |
1498 | * | |
1499 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1500 | * status to recvmsg. We need to add that support in a way thats | |
1501 | * clean when we restucture accept also. | |
1502 | */ | |
1503 | ||
20f37034 HC |
1504 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1505 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1506 | { |
1507 | struct socket *sock, *newsock; | |
39d8c1b6 | 1508 | struct file *newfile; |
6cb153ca | 1509 | int err, len, newfd, fput_needed; |
230b1839 | 1510 | struct sockaddr_storage address; |
1da177e4 | 1511 | |
77d27200 | 1512 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1513 | return -EINVAL; |
1514 | ||
1515 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1516 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1517 | ||
6cb153ca | 1518 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1519 | if (!sock) |
1520 | goto out; | |
1521 | ||
1522 | err = -ENFILE; | |
c6d409cf ED |
1523 | newsock = sock_alloc(); |
1524 | if (!newsock) | |
1da177e4 LT |
1525 | goto out_put; |
1526 | ||
1527 | newsock->type = sock->type; | |
1528 | newsock->ops = sock->ops; | |
1529 | ||
1da177e4 LT |
1530 | /* |
1531 | * We don't need try_module_get here, as the listening socket (sock) | |
1532 | * has the protocol module (sock->ops->owner) held. | |
1533 | */ | |
1534 | __module_get(newsock->ops->owner); | |
1535 | ||
28407630 | 1536 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1537 | if (unlikely(newfd < 0)) { |
1538 | err = newfd; | |
9a1875e6 DM |
1539 | sock_release(newsock); |
1540 | goto out_put; | |
39d8c1b6 | 1541 | } |
aab174f0 | 1542 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
b5ffe634 | 1543 | if (IS_ERR(newfile)) { |
28407630 AV |
1544 | err = PTR_ERR(newfile); |
1545 | put_unused_fd(newfd); | |
28407630 AV |
1546 | goto out_put; |
1547 | } | |
39d8c1b6 | 1548 | |
a79af59e FF |
1549 | err = security_socket_accept(sock, newsock); |
1550 | if (err) | |
39d8c1b6 | 1551 | goto out_fd; |
a79af59e | 1552 | |
cdfbabfb | 1553 | err = sock->ops->accept(sock, newsock, sock->file->f_flags, false); |
1da177e4 | 1554 | if (err < 0) |
39d8c1b6 | 1555 | goto out_fd; |
1da177e4 LT |
1556 | |
1557 | if (upeer_sockaddr) { | |
230b1839 | 1558 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1559 | &len, 2) < 0) { |
1da177e4 | 1560 | err = -ECONNABORTED; |
39d8c1b6 | 1561 | goto out_fd; |
1da177e4 | 1562 | } |
43db362d | 1563 | err = move_addr_to_user(&address, |
230b1839 | 1564 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1565 | if (err < 0) |
39d8c1b6 | 1566 | goto out_fd; |
1da177e4 LT |
1567 | } |
1568 | ||
1569 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1570 | ||
39d8c1b6 DM |
1571 | fd_install(newfd, newfile); |
1572 | err = newfd; | |
1da177e4 | 1573 | |
1da177e4 | 1574 | out_put: |
6cb153ca | 1575 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1576 | out: |
1577 | return err; | |
39d8c1b6 | 1578 | out_fd: |
9606a216 | 1579 | fput(newfile); |
39d8c1b6 | 1580 | put_unused_fd(newfd); |
1da177e4 LT |
1581 | goto out_put; |
1582 | } | |
1583 | ||
20f37034 HC |
1584 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1585 | int __user *, upeer_addrlen) | |
aaca0bdc | 1586 | { |
de11defe | 1587 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1588 | } |
1589 | ||
1da177e4 LT |
1590 | /* |
1591 | * Attempt to connect to a socket with the server address. The address | |
1592 | * is in user space so we verify it is OK and move it to kernel space. | |
1593 | * | |
1594 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1595 | * break bindings | |
1596 | * | |
1597 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1598 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1599 | * include the -EINPROGRESS status for such sockets. | |
1600 | */ | |
1601 | ||
20f37034 HC |
1602 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1603 | int, addrlen) | |
1da177e4 LT |
1604 | { |
1605 | struct socket *sock; | |
230b1839 | 1606 | struct sockaddr_storage address; |
6cb153ca | 1607 | int err, fput_needed; |
1da177e4 | 1608 | |
6cb153ca | 1609 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1610 | if (!sock) |
1611 | goto out; | |
43db362d | 1612 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1613 | if (err < 0) |
1614 | goto out_put; | |
1615 | ||
89bddce5 | 1616 | err = |
230b1839 | 1617 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1618 | if (err) |
1619 | goto out_put; | |
1620 | ||
230b1839 | 1621 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1622 | sock->file->f_flags); |
1623 | out_put: | |
6cb153ca | 1624 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1625 | out: |
1626 | return err; | |
1627 | } | |
1628 | ||
1629 | /* | |
1630 | * Get the local address ('name') of a socket object. Move the obtained | |
1631 | * name to user space. | |
1632 | */ | |
1633 | ||
20f37034 HC |
1634 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1635 | int __user *, usockaddr_len) | |
1da177e4 LT |
1636 | { |
1637 | struct socket *sock; | |
230b1839 | 1638 | struct sockaddr_storage address; |
6cb153ca | 1639 | int len, err, fput_needed; |
89bddce5 | 1640 | |
6cb153ca | 1641 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1642 | if (!sock) |
1643 | goto out; | |
1644 | ||
1645 | err = security_socket_getsockname(sock); | |
1646 | if (err) | |
1647 | goto out_put; | |
1648 | ||
230b1839 | 1649 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1650 | if (err) |
1651 | goto out_put; | |
43db362d | 1652 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1653 | |
1654 | out_put: | |
6cb153ca | 1655 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1656 | out: |
1657 | return err; | |
1658 | } | |
1659 | ||
1660 | /* | |
1661 | * Get the remote address ('name') of a socket object. Move the obtained | |
1662 | * name to user space. | |
1663 | */ | |
1664 | ||
20f37034 HC |
1665 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1666 | int __user *, usockaddr_len) | |
1da177e4 LT |
1667 | { |
1668 | struct socket *sock; | |
230b1839 | 1669 | struct sockaddr_storage address; |
6cb153ca | 1670 | int len, err, fput_needed; |
1da177e4 | 1671 | |
89bddce5 SH |
1672 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1673 | if (sock != NULL) { | |
1da177e4 LT |
1674 | err = security_socket_getpeername(sock); |
1675 | if (err) { | |
6cb153ca | 1676 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1677 | return err; |
1678 | } | |
1679 | ||
89bddce5 | 1680 | err = |
230b1839 | 1681 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1682 | 1); |
1da177e4 | 1683 | if (!err) |
43db362d | 1684 | err = move_addr_to_user(&address, len, usockaddr, |
89bddce5 | 1685 | usockaddr_len); |
6cb153ca | 1686 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1687 | } |
1688 | return err; | |
1689 | } | |
1690 | ||
1691 | /* | |
1692 | * Send a datagram to a given address. We move the address into kernel | |
1693 | * space and check the user space data area is readable before invoking | |
1694 | * the protocol. | |
1695 | */ | |
1696 | ||
3e0fa65f | 1697 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1698 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1699 | int, addr_len) |
1da177e4 LT |
1700 | { |
1701 | struct socket *sock; | |
230b1839 | 1702 | struct sockaddr_storage address; |
1da177e4 LT |
1703 | int err; |
1704 | struct msghdr msg; | |
1705 | struct iovec iov; | |
6cb153ca | 1706 | int fput_needed; |
6cb153ca | 1707 | |
602bd0e9 AV |
1708 | err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter); |
1709 | if (unlikely(err)) | |
1710 | return err; | |
de0fa95c PE |
1711 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1712 | if (!sock) | |
4387ff75 | 1713 | goto out; |
6cb153ca | 1714 | |
89bddce5 | 1715 | msg.msg_name = NULL; |
89bddce5 SH |
1716 | msg.msg_control = NULL; |
1717 | msg.msg_controllen = 0; | |
1718 | msg.msg_namelen = 0; | |
6cb153ca | 1719 | if (addr) { |
43db362d | 1720 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1721 | if (err < 0) |
1722 | goto out_put; | |
230b1839 | 1723 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1724 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1725 | } |
1726 | if (sock->file->f_flags & O_NONBLOCK) | |
1727 | flags |= MSG_DONTWAIT; | |
1728 | msg.msg_flags = flags; | |
d8725c86 | 1729 | err = sock_sendmsg(sock, &msg); |
1da177e4 | 1730 | |
89bddce5 | 1731 | out_put: |
de0fa95c | 1732 | fput_light(sock->file, fput_needed); |
4387ff75 | 1733 | out: |
1da177e4 LT |
1734 | return err; |
1735 | } | |
1736 | ||
1737 | /* | |
89bddce5 | 1738 | * Send a datagram down a socket. |
1da177e4 LT |
1739 | */ |
1740 | ||
3e0fa65f | 1741 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1742 | unsigned int, flags) |
1da177e4 LT |
1743 | { |
1744 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1745 | } | |
1746 | ||
1747 | /* | |
89bddce5 | 1748 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1749 | * sender. We verify the buffers are writable and if needed move the |
1750 | * sender address from kernel to user space. | |
1751 | */ | |
1752 | ||
3e0fa65f | 1753 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
95c96174 | 1754 | unsigned int, flags, struct sockaddr __user *, addr, |
3e0fa65f | 1755 | int __user *, addr_len) |
1da177e4 LT |
1756 | { |
1757 | struct socket *sock; | |
1758 | struct iovec iov; | |
1759 | struct msghdr msg; | |
230b1839 | 1760 | struct sockaddr_storage address; |
89bddce5 | 1761 | int err, err2; |
6cb153ca BL |
1762 | int fput_needed; |
1763 | ||
602bd0e9 AV |
1764 | err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter); |
1765 | if (unlikely(err)) | |
1766 | return err; | |
de0fa95c | 1767 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1768 | if (!sock) |
de0fa95c | 1769 | goto out; |
1da177e4 | 1770 | |
89bddce5 SH |
1771 | msg.msg_control = NULL; |
1772 | msg.msg_controllen = 0; | |
f3d33426 HFS |
1773 | /* Save some cycles and don't copy the address if not needed */ |
1774 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1775 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1776 | msg.msg_namelen = 0; | |
130ed5d1 | 1777 | msg.msg_iocb = NULL; |
9f138fa6 | 1778 | msg.msg_flags = 0; |
1da177e4 LT |
1779 | if (sock->file->f_flags & O_NONBLOCK) |
1780 | flags |= MSG_DONTWAIT; | |
2da62906 | 1781 | err = sock_recvmsg(sock, &msg, flags); |
1da177e4 | 1782 | |
89bddce5 | 1783 | if (err >= 0 && addr != NULL) { |
43db362d | 1784 | err2 = move_addr_to_user(&address, |
230b1839 | 1785 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1786 | if (err2 < 0) |
1787 | err = err2; | |
1da177e4 | 1788 | } |
de0fa95c PE |
1789 | |
1790 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1791 | out: |
1da177e4 LT |
1792 | return err; |
1793 | } | |
1794 | ||
1795 | /* | |
89bddce5 | 1796 | * Receive a datagram from a socket. |
1da177e4 LT |
1797 | */ |
1798 | ||
b7c0ddf5 JG |
1799 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
1800 | unsigned int, flags) | |
1da177e4 LT |
1801 | { |
1802 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1803 | } | |
1804 | ||
1805 | /* | |
1806 | * Set a socket option. Because we don't know the option lengths we have | |
1807 | * to pass the user mode parameter for the protocols to sort out. | |
1808 | */ | |
1809 | ||
20f37034 HC |
1810 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1811 | char __user *, optval, int, optlen) | |
1da177e4 | 1812 | { |
6cb153ca | 1813 | int err, fput_needed; |
1da177e4 LT |
1814 | struct socket *sock; |
1815 | ||
1816 | if (optlen < 0) | |
1817 | return -EINVAL; | |
89bddce5 SH |
1818 | |
1819 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1820 | if (sock != NULL) { | |
1821 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1822 | if (err) |
1823 | goto out_put; | |
1da177e4 LT |
1824 | |
1825 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1826 | err = |
1827 | sock_setsockopt(sock, level, optname, optval, | |
1828 | optlen); | |
1da177e4 | 1829 | else |
89bddce5 SH |
1830 | err = |
1831 | sock->ops->setsockopt(sock, level, optname, optval, | |
1832 | optlen); | |
6cb153ca BL |
1833 | out_put: |
1834 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1835 | } |
1836 | return err; | |
1837 | } | |
1838 | ||
1839 | /* | |
1840 | * Get a socket option. Because we don't know the option lengths we have | |
1841 | * to pass a user mode parameter for the protocols to sort out. | |
1842 | */ | |
1843 | ||
20f37034 HC |
1844 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1845 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1846 | { |
6cb153ca | 1847 | int err, fput_needed; |
1da177e4 LT |
1848 | struct socket *sock; |
1849 | ||
89bddce5 SH |
1850 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1851 | if (sock != NULL) { | |
6cb153ca BL |
1852 | err = security_socket_getsockopt(sock, level, optname); |
1853 | if (err) | |
1854 | goto out_put; | |
1da177e4 LT |
1855 | |
1856 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1857 | err = |
1858 | sock_getsockopt(sock, level, optname, optval, | |
1859 | optlen); | |
1da177e4 | 1860 | else |
89bddce5 SH |
1861 | err = |
1862 | sock->ops->getsockopt(sock, level, optname, optval, | |
1863 | optlen); | |
6cb153ca BL |
1864 | out_put: |
1865 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1866 | } |
1867 | return err; | |
1868 | } | |
1869 | ||
1da177e4 LT |
1870 | /* |
1871 | * Shutdown a socket. | |
1872 | */ | |
1873 | ||
754fe8d2 | 1874 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1875 | { |
6cb153ca | 1876 | int err, fput_needed; |
1da177e4 LT |
1877 | struct socket *sock; |
1878 | ||
89bddce5 SH |
1879 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1880 | if (sock != NULL) { | |
1da177e4 | 1881 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1882 | if (!err) |
1883 | err = sock->ops->shutdown(sock, how); | |
1884 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1885 | } |
1886 | return err; | |
1887 | } | |
1888 | ||
89bddce5 | 1889 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1890 | * fields which are the same type (int / unsigned) on our platforms. |
1891 | */ | |
1892 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1893 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1894 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1895 | ||
c71d8ebe TH |
1896 | struct used_address { |
1897 | struct sockaddr_storage name; | |
1898 | unsigned int name_len; | |
1899 | }; | |
1900 | ||
da184284 AV |
1901 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
1902 | struct user_msghdr __user *umsg, | |
1903 | struct sockaddr __user **save_addr, | |
1904 | struct iovec **iov) | |
1661bf36 | 1905 | { |
ffb07550 | 1906 | struct user_msghdr msg; |
08adb7da AV |
1907 | ssize_t err; |
1908 | ||
ffb07550 | 1909 | if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
1661bf36 | 1910 | return -EFAULT; |
dbb490b9 | 1911 | |
864d9664 | 1912 | kmsg->msg_control = (void __force *)msg.msg_control; |
ffb07550 AV |
1913 | kmsg->msg_controllen = msg.msg_controllen; |
1914 | kmsg->msg_flags = msg.msg_flags; | |
1915 | ||
1916 | kmsg->msg_namelen = msg.msg_namelen; | |
1917 | if (!msg.msg_name) | |
6a2a2b3a AS |
1918 | kmsg->msg_namelen = 0; |
1919 | ||
dbb490b9 ML |
1920 | if (kmsg->msg_namelen < 0) |
1921 | return -EINVAL; | |
1922 | ||
1661bf36 | 1923 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 1924 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
08adb7da AV |
1925 | |
1926 | if (save_addr) | |
ffb07550 | 1927 | *save_addr = msg.msg_name; |
08adb7da | 1928 | |
ffb07550 | 1929 | if (msg.msg_name && kmsg->msg_namelen) { |
08adb7da | 1930 | if (!save_addr) { |
864d9664 PA |
1931 | err = move_addr_to_kernel(msg.msg_name, |
1932 | kmsg->msg_namelen, | |
08adb7da AV |
1933 | kmsg->msg_name); |
1934 | if (err < 0) | |
1935 | return err; | |
1936 | } | |
1937 | } else { | |
1938 | kmsg->msg_name = NULL; | |
1939 | kmsg->msg_namelen = 0; | |
1940 | } | |
1941 | ||
ffb07550 | 1942 | if (msg.msg_iovlen > UIO_MAXIOV) |
08adb7da AV |
1943 | return -EMSGSIZE; |
1944 | ||
0345f931 | 1945 | kmsg->msg_iocb = NULL; |
1946 | ||
ffb07550 AV |
1947 | return import_iovec(save_addr ? READ : WRITE, |
1948 | msg.msg_iov, msg.msg_iovlen, | |
da184284 | 1949 | UIO_FASTIOV, iov, &kmsg->msg_iter); |
1661bf36 DC |
1950 | } |
1951 | ||
666547ff | 1952 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 1953 | struct msghdr *msg_sys, unsigned int flags, |
28a94d8f TH |
1954 | struct used_address *used_address, |
1955 | unsigned int allowed_msghdr_flags) | |
1da177e4 | 1956 | { |
89bddce5 SH |
1957 | struct compat_msghdr __user *msg_compat = |
1958 | (struct compat_msghdr __user *)msg; | |
230b1839 | 1959 | struct sockaddr_storage address; |
1da177e4 | 1960 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1961 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
846cc123 | 1962 | __aligned(sizeof(__kernel_size_t)); |
89bddce5 | 1963 | /* 20 is size of ipv6_pktinfo */ |
1da177e4 | 1964 | unsigned char *ctl_buf = ctl; |
d8725c86 | 1965 | int ctl_len; |
08adb7da | 1966 | ssize_t err; |
89bddce5 | 1967 | |
08adb7da | 1968 | msg_sys->msg_name = &address; |
1da177e4 | 1969 | |
08449320 | 1970 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 1971 | err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov); |
08449320 | 1972 | else |
08adb7da | 1973 | err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov); |
89bddce5 | 1974 | if (err < 0) |
da184284 | 1975 | return err; |
1da177e4 LT |
1976 | |
1977 | err = -ENOBUFS; | |
1978 | ||
228e548e | 1979 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 1980 | goto out_freeiov; |
28a94d8f | 1981 | flags |= (msg_sys->msg_flags & allowed_msghdr_flags); |
228e548e | 1982 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 1983 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 1984 | err = |
228e548e | 1985 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 1986 | sizeof(ctl)); |
1da177e4 LT |
1987 | if (err) |
1988 | goto out_freeiov; | |
228e548e AB |
1989 | ctl_buf = msg_sys->msg_control; |
1990 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 1991 | } else if (ctl_len) { |
ac4340fc DM |
1992 | BUILD_BUG_ON(sizeof(struct cmsghdr) != |
1993 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
89bddce5 | 1994 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1995 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1996 | if (ctl_buf == NULL) |
1da177e4 LT |
1997 | goto out_freeiov; |
1998 | } | |
1999 | err = -EFAULT; | |
2000 | /* | |
228e548e | 2001 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2002 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2003 | * checking falls down on this. | |
2004 | */ | |
fb8621bb | 2005 | if (copy_from_user(ctl_buf, |
228e548e | 2006 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2007 | ctl_len)) |
1da177e4 | 2008 | goto out_freectl; |
228e548e | 2009 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2010 | } |
228e548e | 2011 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2012 | |
2013 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2014 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2015 | /* |
2016 | * If this is sendmmsg() and current destination address is same as | |
2017 | * previously succeeded address, omit asking LSM's decision. | |
2018 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2019 | * destination address never matches. | |
2020 | */ | |
bc909d9d MD |
2021 | if (used_address && msg_sys->msg_name && |
2022 | used_address->name_len == msg_sys->msg_namelen && | |
2023 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe | 2024 | used_address->name_len)) { |
d8725c86 | 2025 | err = sock_sendmsg_nosec(sock, msg_sys); |
c71d8ebe TH |
2026 | goto out_freectl; |
2027 | } | |
d8725c86 | 2028 | err = sock_sendmsg(sock, msg_sys); |
c71d8ebe TH |
2029 | /* |
2030 | * If this is sendmmsg() and sending to current destination address was | |
2031 | * successful, remember it. | |
2032 | */ | |
2033 | if (used_address && err >= 0) { | |
2034 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2035 | if (msg_sys->msg_name) |
2036 | memcpy(&used_address->name, msg_sys->msg_name, | |
2037 | used_address->name_len); | |
c71d8ebe | 2038 | } |
1da177e4 LT |
2039 | |
2040 | out_freectl: | |
89bddce5 | 2041 | if (ctl_buf != ctl) |
1da177e4 LT |
2042 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2043 | out_freeiov: | |
da184284 | 2044 | kfree(iov); |
228e548e AB |
2045 | return err; |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * BSD sendmsg interface | |
2050 | */ | |
2051 | ||
666547ff | 2052 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
228e548e AB |
2053 | { |
2054 | int fput_needed, err; | |
2055 | struct msghdr msg_sys; | |
1be374a0 AL |
2056 | struct socket *sock; |
2057 | ||
1be374a0 | 2058 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2059 | if (!sock) |
2060 | goto out; | |
2061 | ||
28a94d8f | 2062 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0); |
228e548e | 2063 | |
6cb153ca | 2064 | fput_light(sock->file, fput_needed); |
89bddce5 | 2065 | out: |
1da177e4 LT |
2066 | return err; |
2067 | } | |
2068 | ||
666547ff | 2069 | SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
a7526eb5 AL |
2070 | { |
2071 | if (flags & MSG_CMSG_COMPAT) | |
2072 | return -EINVAL; | |
2073 | return __sys_sendmsg(fd, msg, flags); | |
2074 | } | |
2075 | ||
228e548e AB |
2076 | /* |
2077 | * Linux sendmmsg interface | |
2078 | */ | |
2079 | ||
2080 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2081 | unsigned int flags) | |
2082 | { | |
2083 | int fput_needed, err, datagrams; | |
2084 | struct socket *sock; | |
2085 | struct mmsghdr __user *entry; | |
2086 | struct compat_mmsghdr __user *compat_entry; | |
2087 | struct msghdr msg_sys; | |
c71d8ebe | 2088 | struct used_address used_address; |
f092276d | 2089 | unsigned int oflags = flags; |
228e548e | 2090 | |
98382f41 AB |
2091 | if (vlen > UIO_MAXIOV) |
2092 | vlen = UIO_MAXIOV; | |
228e548e AB |
2093 | |
2094 | datagrams = 0; | |
2095 | ||
2096 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2097 | if (!sock) | |
2098 | return err; | |
2099 | ||
c71d8ebe | 2100 | used_address.name_len = UINT_MAX; |
228e548e AB |
2101 | entry = mmsg; |
2102 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2103 | err = 0; |
f092276d | 2104 | flags |= MSG_BATCH; |
228e548e AB |
2105 | |
2106 | while (datagrams < vlen) { | |
f092276d TH |
2107 | if (datagrams == vlen - 1) |
2108 | flags = oflags; | |
2109 | ||
228e548e | 2110 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2111 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
28a94d8f | 2112 | &msg_sys, flags, &used_address, MSG_EOR); |
228e548e AB |
2113 | if (err < 0) |
2114 | break; | |
2115 | err = __put_user(err, &compat_entry->msg_len); | |
2116 | ++compat_entry; | |
2117 | } else { | |
a7526eb5 | 2118 | err = ___sys_sendmsg(sock, |
666547ff | 2119 | (struct user_msghdr __user *)entry, |
28a94d8f | 2120 | &msg_sys, flags, &used_address, MSG_EOR); |
228e548e AB |
2121 | if (err < 0) |
2122 | break; | |
2123 | err = put_user(err, &entry->msg_len); | |
2124 | ++entry; | |
2125 | } | |
2126 | ||
2127 | if (err) | |
2128 | break; | |
2129 | ++datagrams; | |
3023898b SHY |
2130 | if (msg_data_left(&msg_sys)) |
2131 | break; | |
a78cb84c | 2132 | cond_resched(); |
228e548e AB |
2133 | } |
2134 | ||
228e548e AB |
2135 | fput_light(sock->file, fput_needed); |
2136 | ||
728ffb86 AB |
2137 | /* We only return an error if no datagrams were able to be sent */ |
2138 | if (datagrams != 0) | |
228e548e AB |
2139 | return datagrams; |
2140 | ||
228e548e AB |
2141 | return err; |
2142 | } | |
2143 | ||
2144 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2145 | unsigned int, vlen, unsigned int, flags) | |
2146 | { | |
1be374a0 AL |
2147 | if (flags & MSG_CMSG_COMPAT) |
2148 | return -EINVAL; | |
228e548e AB |
2149 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
2150 | } | |
2151 | ||
666547ff | 2152 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 2153 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2154 | { |
89bddce5 SH |
2155 | struct compat_msghdr __user *msg_compat = |
2156 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2157 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2158 | struct iovec *iov = iovstack; |
1da177e4 | 2159 | unsigned long cmsg_ptr; |
2da62906 | 2160 | int len; |
08adb7da | 2161 | ssize_t err; |
1da177e4 LT |
2162 | |
2163 | /* kernel mode address */ | |
230b1839 | 2164 | struct sockaddr_storage addr; |
1da177e4 LT |
2165 | |
2166 | /* user mode address pointers */ | |
2167 | struct sockaddr __user *uaddr; | |
08adb7da | 2168 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
89bddce5 | 2169 | |
08adb7da | 2170 | msg_sys->msg_name = &addr; |
1da177e4 | 2171 | |
f3d33426 | 2172 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 2173 | err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov); |
f3d33426 | 2174 | else |
08adb7da | 2175 | err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov); |
1da177e4 | 2176 | if (err < 0) |
da184284 | 2177 | return err; |
1da177e4 | 2178 | |
a2e27255 ACM |
2179 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2180 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2181 | |
f3d33426 HFS |
2182 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2183 | msg_sys->msg_namelen = 0; | |
2184 | ||
1da177e4 LT |
2185 | if (sock->file->f_flags & O_NONBLOCK) |
2186 | flags |= MSG_DONTWAIT; | |
2da62906 | 2187 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, flags); |
1da177e4 LT |
2188 | if (err < 0) |
2189 | goto out_freeiov; | |
2190 | len = err; | |
2191 | ||
2192 | if (uaddr != NULL) { | |
43db362d | 2193 | err = move_addr_to_user(&addr, |
a2e27255 | 2194 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2195 | uaddr_len); |
1da177e4 LT |
2196 | if (err < 0) |
2197 | goto out_freeiov; | |
2198 | } | |
a2e27255 | 2199 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2200 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2201 | if (err) |
2202 | goto out_freeiov; | |
2203 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2204 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2205 | &msg_compat->msg_controllen); |
2206 | else | |
a2e27255 | 2207 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2208 | &msg->msg_controllen); |
2209 | if (err) | |
2210 | goto out_freeiov; | |
2211 | err = len; | |
2212 | ||
2213 | out_freeiov: | |
da184284 | 2214 | kfree(iov); |
a2e27255 ACM |
2215 | return err; |
2216 | } | |
2217 | ||
2218 | /* | |
2219 | * BSD recvmsg interface | |
2220 | */ | |
2221 | ||
666547ff | 2222 | long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
a2e27255 ACM |
2223 | { |
2224 | int fput_needed, err; | |
2225 | struct msghdr msg_sys; | |
1be374a0 AL |
2226 | struct socket *sock; |
2227 | ||
1be374a0 | 2228 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2229 | if (!sock) |
2230 | goto out; | |
2231 | ||
a7526eb5 | 2232 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2233 | |
6cb153ca | 2234 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2235 | out: |
2236 | return err; | |
2237 | } | |
2238 | ||
666547ff | 2239 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
a7526eb5 AL |
2240 | unsigned int, flags) |
2241 | { | |
2242 | if (flags & MSG_CMSG_COMPAT) | |
2243 | return -EINVAL; | |
2244 | return __sys_recvmsg(fd, msg, flags); | |
2245 | } | |
2246 | ||
a2e27255 ACM |
2247 | /* |
2248 | * Linux recvmmsg interface | |
2249 | */ | |
2250 | ||
2251 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2252 | unsigned int flags, struct timespec *timeout) | |
2253 | { | |
2254 | int fput_needed, err, datagrams; | |
2255 | struct socket *sock; | |
2256 | struct mmsghdr __user *entry; | |
d7256d0e | 2257 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 | 2258 | struct msghdr msg_sys; |
766b9f92 DD |
2259 | struct timespec64 end_time; |
2260 | struct timespec64 timeout64; | |
a2e27255 ACM |
2261 | |
2262 | if (timeout && | |
2263 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2264 | timeout->tv_nsec)) | |
2265 | return -EINVAL; | |
2266 | ||
2267 | datagrams = 0; | |
2268 | ||
2269 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2270 | if (!sock) | |
2271 | return err; | |
2272 | ||
2273 | err = sock_error(sock->sk); | |
e623a9e9 MJ |
2274 | if (err) { |
2275 | datagrams = err; | |
a2e27255 | 2276 | goto out_put; |
e623a9e9 | 2277 | } |
a2e27255 ACM |
2278 | |
2279 | entry = mmsg; | |
d7256d0e | 2280 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2281 | |
2282 | while (datagrams < vlen) { | |
2283 | /* | |
2284 | * No need to ask LSM for more than the first datagram. | |
2285 | */ | |
d7256d0e | 2286 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2287 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5 AL |
2288 | &msg_sys, flags & ~MSG_WAITFORONE, |
2289 | datagrams); | |
d7256d0e JMG |
2290 | if (err < 0) |
2291 | break; | |
2292 | err = __put_user(err, &compat_entry->msg_len); | |
2293 | ++compat_entry; | |
2294 | } else { | |
a7526eb5 | 2295 | err = ___sys_recvmsg(sock, |
666547ff | 2296 | (struct user_msghdr __user *)entry, |
a7526eb5 AL |
2297 | &msg_sys, flags & ~MSG_WAITFORONE, |
2298 | datagrams); | |
d7256d0e JMG |
2299 | if (err < 0) |
2300 | break; | |
2301 | err = put_user(err, &entry->msg_len); | |
2302 | ++entry; | |
2303 | } | |
2304 | ||
a2e27255 ACM |
2305 | if (err) |
2306 | break; | |
a2e27255 ACM |
2307 | ++datagrams; |
2308 | ||
71c5c159 BB |
2309 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2310 | if (flags & MSG_WAITFORONE) | |
2311 | flags |= MSG_DONTWAIT; | |
2312 | ||
a2e27255 | 2313 | if (timeout) { |
766b9f92 DD |
2314 | ktime_get_ts64(&timeout64); |
2315 | *timeout = timespec64_to_timespec( | |
2316 | timespec64_sub(end_time, timeout64)); | |
a2e27255 ACM |
2317 | if (timeout->tv_sec < 0) { |
2318 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2319 | break; | |
2320 | } | |
2321 | ||
2322 | /* Timeout, return less than vlen datagrams */ | |
2323 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2324 | break; | |
2325 | } | |
2326 | ||
2327 | /* Out of band data, return right away */ | |
2328 | if (msg_sys.msg_flags & MSG_OOB) | |
2329 | break; | |
a78cb84c | 2330 | cond_resched(); |
a2e27255 ACM |
2331 | } |
2332 | ||
a2e27255 | 2333 | if (err == 0) |
34b88a68 ACM |
2334 | goto out_put; |
2335 | ||
2336 | if (datagrams == 0) { | |
2337 | datagrams = err; | |
2338 | goto out_put; | |
2339 | } | |
a2e27255 | 2340 | |
34b88a68 ACM |
2341 | /* |
2342 | * We may return less entries than requested (vlen) if the | |
2343 | * sock is non block and there aren't enough datagrams... | |
2344 | */ | |
2345 | if (err != -EAGAIN) { | |
a2e27255 | 2346 | /* |
34b88a68 ACM |
2347 | * ... or if recvmsg returns an error after we |
2348 | * received some datagrams, where we record the | |
2349 | * error to return on the next call or if the | |
2350 | * app asks about it using getsockopt(SO_ERROR). | |
a2e27255 | 2351 | */ |
34b88a68 | 2352 | sock->sk->sk_err = -err; |
a2e27255 | 2353 | } |
34b88a68 ACM |
2354 | out_put: |
2355 | fput_light(sock->file, fput_needed); | |
a2e27255 | 2356 | |
34b88a68 | 2357 | return datagrams; |
a2e27255 ACM |
2358 | } |
2359 | ||
2360 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2361 | unsigned int, vlen, unsigned int, flags, | |
2362 | struct timespec __user *, timeout) | |
2363 | { | |
2364 | int datagrams; | |
2365 | struct timespec timeout_sys; | |
2366 | ||
1be374a0 AL |
2367 | if (flags & MSG_CMSG_COMPAT) |
2368 | return -EINVAL; | |
2369 | ||
a2e27255 ACM |
2370 | if (!timeout) |
2371 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2372 | ||
2373 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2374 | return -EFAULT; | |
2375 | ||
2376 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2377 | ||
2378 | if (datagrams > 0 && | |
2379 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2380 | datagrams = -EFAULT; | |
2381 | ||
2382 | return datagrams; | |
2383 | } | |
2384 | ||
2385 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2386 | /* Argument list sizes for sys_socketcall */ |
2387 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2388 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2389 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2390 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2391 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2392 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2393 | }; |
2394 | ||
1da177e4 LT |
2395 | #undef AL |
2396 | ||
2397 | /* | |
89bddce5 | 2398 | * System call vectors. |
1da177e4 LT |
2399 | * |
2400 | * Argument checking cleaned up. Saved 20% in size. | |
2401 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2402 | * it is set by the callees. |
1da177e4 LT |
2403 | */ |
2404 | ||
3e0fa65f | 2405 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2406 | { |
2950fa9d | 2407 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2408 | unsigned long a0, a1; |
1da177e4 | 2409 | int err; |
47379052 | 2410 | unsigned int len; |
1da177e4 | 2411 | |
228e548e | 2412 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2413 | return -EINVAL; |
2414 | ||
47379052 AV |
2415 | len = nargs[call]; |
2416 | if (len > sizeof(a)) | |
2417 | return -EINVAL; | |
2418 | ||
1da177e4 | 2419 | /* copy_from_user should be SMP safe. */ |
47379052 | 2420 | if (copy_from_user(a, args, len)) |
1da177e4 | 2421 | return -EFAULT; |
3ec3b2fb | 2422 | |
2950fa9d CG |
2423 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2424 | if (err) | |
2425 | return err; | |
3ec3b2fb | 2426 | |
89bddce5 SH |
2427 | a0 = a[0]; |
2428 | a1 = a[1]; | |
2429 | ||
2430 | switch (call) { | |
2431 | case SYS_SOCKET: | |
2432 | err = sys_socket(a0, a1, a[2]); | |
2433 | break; | |
2434 | case SYS_BIND: | |
2435 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2436 | break; | |
2437 | case SYS_CONNECT: | |
2438 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2439 | break; | |
2440 | case SYS_LISTEN: | |
2441 | err = sys_listen(a0, a1); | |
2442 | break; | |
2443 | case SYS_ACCEPT: | |
de11defe UD |
2444 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2445 | (int __user *)a[2], 0); | |
89bddce5 SH |
2446 | break; |
2447 | case SYS_GETSOCKNAME: | |
2448 | err = | |
2449 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2450 | (int __user *)a[2]); | |
2451 | break; | |
2452 | case SYS_GETPEERNAME: | |
2453 | err = | |
2454 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2455 | (int __user *)a[2]); | |
2456 | break; | |
2457 | case SYS_SOCKETPAIR: | |
2458 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2459 | break; | |
2460 | case SYS_SEND: | |
2461 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2462 | break; | |
2463 | case SYS_SENDTO: | |
2464 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2465 | (struct sockaddr __user *)a[4], a[5]); | |
2466 | break; | |
2467 | case SYS_RECV: | |
2468 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2469 | break; | |
2470 | case SYS_RECVFROM: | |
2471 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2472 | (struct sockaddr __user *)a[4], | |
2473 | (int __user *)a[5]); | |
2474 | break; | |
2475 | case SYS_SHUTDOWN: | |
2476 | err = sys_shutdown(a0, a1); | |
2477 | break; | |
2478 | case SYS_SETSOCKOPT: | |
2479 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2480 | break; | |
2481 | case SYS_GETSOCKOPT: | |
2482 | err = | |
2483 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2484 | (int __user *)a[4]); | |
2485 | break; | |
2486 | case SYS_SENDMSG: | |
666547ff | 2487 | err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce5 | 2488 | break; |
228e548e AB |
2489 | case SYS_SENDMMSG: |
2490 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); | |
2491 | break; | |
89bddce5 | 2492 | case SYS_RECVMSG: |
666547ff | 2493 | err = sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
89bddce5 | 2494 | break; |
a2e27255 ACM |
2495 | case SYS_RECVMMSG: |
2496 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2497 | (struct timespec __user *)a[4]); | |
2498 | break; | |
de11defe UD |
2499 | case SYS_ACCEPT4: |
2500 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2501 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2502 | break; |
89bddce5 SH |
2503 | default: |
2504 | err = -EINVAL; | |
2505 | break; | |
1da177e4 LT |
2506 | } |
2507 | return err; | |
2508 | } | |
2509 | ||
89bddce5 | 2510 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2511 | |
55737fda SH |
2512 | /** |
2513 | * sock_register - add a socket protocol handler | |
2514 | * @ops: description of protocol | |
2515 | * | |
1da177e4 LT |
2516 | * This function is called by a protocol handler that wants to |
2517 | * advertise its address family, and have it linked into the | |
e793c0f7 | 2518 | * socket interface. The value ops->family corresponds to the |
55737fda | 2519 | * socket system call protocol family. |
1da177e4 | 2520 | */ |
f0fd27d4 | 2521 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2522 | { |
2523 | int err; | |
2524 | ||
2525 | if (ops->family >= NPROTO) { | |
3410f22e | 2526 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
1da177e4 LT |
2527 | return -ENOBUFS; |
2528 | } | |
55737fda SH |
2529 | |
2530 | spin_lock(&net_family_lock); | |
190683a9 ED |
2531 | if (rcu_dereference_protected(net_families[ops->family], |
2532 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2533 | err = -EEXIST; |
2534 | else { | |
cf778b00 | 2535 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2536 | err = 0; |
2537 | } | |
55737fda SH |
2538 | spin_unlock(&net_family_lock); |
2539 | ||
3410f22e | 2540 | pr_info("NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2541 | return err; |
2542 | } | |
c6d409cf | 2543 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2544 | |
55737fda SH |
2545 | /** |
2546 | * sock_unregister - remove a protocol handler | |
2547 | * @family: protocol family to remove | |
2548 | * | |
1da177e4 LT |
2549 | * This function is called by a protocol handler that wants to |
2550 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2551 | * new socket creation. |
2552 | * | |
2553 | * If protocol handler is a module, then it can use module reference | |
2554 | * counts to protect against new references. If protocol handler is not | |
2555 | * a module then it needs to provide its own protection in | |
2556 | * the ops->create routine. | |
1da177e4 | 2557 | */ |
f0fd27d4 | 2558 | void sock_unregister(int family) |
1da177e4 | 2559 | { |
f0fd27d4 | 2560 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2561 | |
55737fda | 2562 | spin_lock(&net_family_lock); |
a9b3cd7f | 2563 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2564 | spin_unlock(&net_family_lock); |
2565 | ||
2566 | synchronize_rcu(); | |
2567 | ||
3410f22e | 2568 | pr_info("NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2569 | } |
c6d409cf | 2570 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2571 | |
77d76ea3 | 2572 | static int __init sock_init(void) |
1da177e4 | 2573 | { |
b3e19d92 | 2574 | int err; |
2ca794e5 EB |
2575 | /* |
2576 | * Initialize the network sysctl infrastructure. | |
2577 | */ | |
2578 | err = net_sysctl_init(); | |
2579 | if (err) | |
2580 | goto out; | |
b3e19d92 | 2581 | |
1da177e4 | 2582 | /* |
89bddce5 | 2583 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2584 | */ |
2585 | skb_init(); | |
1da177e4 LT |
2586 | |
2587 | /* | |
89bddce5 | 2588 | * Initialize the protocols module. |
1da177e4 LT |
2589 | */ |
2590 | ||
2591 | init_inodecache(); | |
b3e19d92 NP |
2592 | |
2593 | err = register_filesystem(&sock_fs_type); | |
2594 | if (err) | |
2595 | goto out_fs; | |
1da177e4 | 2596 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2597 | if (IS_ERR(sock_mnt)) { |
2598 | err = PTR_ERR(sock_mnt); | |
2599 | goto out_mount; | |
2600 | } | |
77d76ea3 AK |
2601 | |
2602 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2603 | */ |
2604 | ||
2605 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2606 | err = netfilter_init(); |
2607 | if (err) | |
2608 | goto out; | |
1da177e4 | 2609 | #endif |
cbeb321a | 2610 | |
408eccce | 2611 | ptp_classifier_init(); |
c1f19b51 | 2612 | |
b3e19d92 NP |
2613 | out: |
2614 | return err; | |
2615 | ||
2616 | out_mount: | |
2617 | unregister_filesystem(&sock_fs_type); | |
2618 | out_fs: | |
2619 | goto out; | |
1da177e4 LT |
2620 | } |
2621 | ||
77d76ea3 AK |
2622 | core_initcall(sock_init); /* early initcall */ |
2623 | ||
290af866 AS |
2624 | static int __init jit_init(void) |
2625 | { | |
2626 | #ifdef CONFIG_BPF_JIT_ALWAYS_ON | |
2627 | bpf_jit_enable = 1; | |
2628 | #endif | |
2629 | return 0; | |
2630 | } | |
2631 | pure_initcall(jit_init); | |
2632 | ||
1da177e4 LT |
2633 | #ifdef CONFIG_PROC_FS |
2634 | void socket_seq_show(struct seq_file *seq) | |
2635 | { | |
2636 | int cpu; | |
2637 | int counter = 0; | |
2638 | ||
6f912042 | 2639 | for_each_possible_cpu(cpu) |
89bddce5 | 2640 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2641 | |
2642 | /* It can be negative, by the way. 8) */ | |
2643 | if (counter < 0) | |
2644 | counter = 0; | |
2645 | ||
2646 | seq_printf(seq, "sockets: used %d\n", counter); | |
2647 | } | |
89bddce5 | 2648 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2649 | |
89bbfc95 | 2650 | #ifdef CONFIG_COMPAT |
6b96018b | 2651 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2652 | unsigned int cmd, void __user *up) |
7a229387 | 2653 | { |
7a229387 AB |
2654 | mm_segment_t old_fs = get_fs(); |
2655 | struct timeval ktv; | |
2656 | int err; | |
2657 | ||
2658 | set_fs(KERNEL_DS); | |
6b96018b | 2659 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2660 | set_fs(old_fs); |
644595f8 | 2661 | if (!err) |
ed6fe9d6 | 2662 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2663 | |
7a229387 AB |
2664 | return err; |
2665 | } | |
2666 | ||
6b96018b | 2667 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2668 | unsigned int cmd, void __user *up) |
7a229387 | 2669 | { |
7a229387 AB |
2670 | mm_segment_t old_fs = get_fs(); |
2671 | struct timespec kts; | |
2672 | int err; | |
2673 | ||
2674 | set_fs(KERNEL_DS); | |
6b96018b | 2675 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2676 | set_fs(old_fs); |
644595f8 | 2677 | if (!err) |
ed6fe9d6 | 2678 | err = compat_put_timespec(&kts, up); |
644595f8 | 2679 | |
7a229387 AB |
2680 | return err; |
2681 | } | |
2682 | ||
6b96018b | 2683 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2684 | { |
2685 | struct ifreq __user *uifr; | |
2686 | int err; | |
2687 | ||
2688 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2689 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2690 | return -EFAULT; |
2691 | ||
6b96018b | 2692 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2693 | if (err) |
2694 | return err; | |
2695 | ||
6b96018b | 2696 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2697 | return -EFAULT; |
2698 | ||
2699 | return 0; | |
2700 | } | |
2701 | ||
6b96018b | 2702 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2703 | { |
6b96018b | 2704 | struct compat_ifconf ifc32; |
7a229387 AB |
2705 | struct ifconf ifc; |
2706 | struct ifconf __user *uifc; | |
6b96018b | 2707 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2708 | struct ifreq __user *ifr; |
2709 | unsigned int i, j; | |
2710 | int err; | |
2711 | ||
6b96018b | 2712 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2713 | return -EFAULT; |
2714 | ||
43da5f2e | 2715 | memset(&ifc, 0, sizeof(ifc)); |
7a229387 AB |
2716 | if (ifc32.ifcbuf == 0) { |
2717 | ifc32.ifc_len = 0; | |
2718 | ifc.ifc_len = 0; | |
2719 | ifc.ifc_req = NULL; | |
2720 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2721 | } else { | |
c6d409cf ED |
2722 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2723 | sizeof(struct ifreq); | |
7a229387 AB |
2724 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2725 | ifc.ifc_len = len; | |
2726 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2727 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2728 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2729 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2730 | return -EFAULT; |
2731 | ifr++; | |
2732 | ifr32++; | |
2733 | } | |
2734 | } | |
2735 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2736 | return -EFAULT; | |
2737 | ||
6b96018b | 2738 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2739 | if (err) |
2740 | return err; | |
2741 | ||
2742 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2743 | return -EFAULT; | |
2744 | ||
2745 | ifr = ifc.ifc_req; | |
2746 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2747 | for (i = 0, j = 0; | |
c6d409cf ED |
2748 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2749 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2750 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2751 | return -EFAULT; |
2752 | ifr32++; | |
2753 | ifr++; | |
2754 | } | |
2755 | ||
2756 | if (ifc32.ifcbuf == 0) { | |
2757 | /* Translate from 64-bit structure multiple to | |
2758 | * a 32-bit one. | |
2759 | */ | |
2760 | i = ifc.ifc_len; | |
6b96018b | 2761 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2762 | ifc32.ifc_len = i; |
2763 | } else { | |
2764 | ifc32.ifc_len = i; | |
2765 | } | |
6b96018b | 2766 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2767 | return -EFAULT; |
2768 | ||
2769 | return 0; | |
2770 | } | |
2771 | ||
6b96018b | 2772 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2773 | { |
3a7da39d BH |
2774 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2775 | bool convert_in = false, convert_out = false; | |
2776 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); | |
2777 | struct ethtool_rxnfc __user *rxnfc; | |
7a229387 | 2778 | struct ifreq __user *ifr; |
3a7da39d BH |
2779 | u32 rule_cnt = 0, actual_rule_cnt; |
2780 | u32 ethcmd; | |
7a229387 | 2781 | u32 data; |
3a7da39d | 2782 | int ret; |
7a229387 | 2783 | |
3a7da39d BH |
2784 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2785 | return -EFAULT; | |
7a229387 | 2786 | |
3a7da39d BH |
2787 | compat_rxnfc = compat_ptr(data); |
2788 | ||
2789 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2790 | return -EFAULT; |
2791 | ||
3a7da39d BH |
2792 | /* Most ethtool structures are defined without padding. |
2793 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2794 | */ | |
2795 | switch (ethcmd) { | |
2796 | default: | |
2797 | break; | |
2798 | case ETHTOOL_GRXCLSRLALL: | |
2799 | /* Buffer size is variable */ | |
2800 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2801 | return -EFAULT; | |
2802 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2803 | return -ENOMEM; | |
2804 | buf_size += rule_cnt * sizeof(u32); | |
2805 | /* fall through */ | |
2806 | case ETHTOOL_GRXRINGS: | |
2807 | case ETHTOOL_GRXCLSRLCNT: | |
2808 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2809 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2810 | convert_out = true; |
2811 | /* fall through */ | |
2812 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2813 | buf_size += sizeof(struct ethtool_rxnfc); |
2814 | convert_in = true; | |
2815 | break; | |
2816 | } | |
2817 | ||
2818 | ifr = compat_alloc_user_space(buf_size); | |
954b1244 | 2819 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
3a7da39d BH |
2820 | |
2821 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
7a229387 AB |
2822 | return -EFAULT; |
2823 | ||
3a7da39d BH |
2824 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
2825 | &ifr->ifr_ifru.ifru_data)) | |
7a229387 AB |
2826 | return -EFAULT; |
2827 | ||
3a7da39d | 2828 | if (convert_in) { |
127fe533 | 2829 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2830 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2831 | */ | |
127fe533 AD |
2832 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2833 | sizeof(compat_rxnfc->fs.m_ext) != | |
2834 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2835 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2836 | BUILD_BUG_ON( |
2837 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2838 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2839 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2840 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2841 | ||
2842 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2843 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2844 | (void __user *)rxnfc) || | |
3a7da39d BH |
2845 | copy_in_user(&rxnfc->fs.ring_cookie, |
2846 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2847 | (void __user *)(&rxnfc->fs.location + 1) - |
2848 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2849 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2850 | sizeof(rxnfc->rule_cnt))) | |
2851 | return -EFAULT; | |
2852 | } | |
2853 | ||
2854 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); | |
2855 | if (ret) | |
2856 | return ret; | |
2857 | ||
2858 | if (convert_out) { | |
2859 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2860 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2861 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2862 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2863 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2864 | (const void __user *)(&rxnfc->fs.location + 1) - |
2865 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2866 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2867 | sizeof(rxnfc->rule_cnt))) | |
2868 | return -EFAULT; | |
2869 | ||
2870 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2871 | /* As an optimisation, we only copy the actual | |
2872 | * number of rules that the underlying | |
2873 | * function returned. Since Mallory might | |
2874 | * change the rule count in user memory, we | |
2875 | * check that it is less than the rule count | |
2876 | * originally given (as the user buffer size), | |
2877 | * which has been range-checked. | |
2878 | */ | |
2879 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2880 | return -EFAULT; | |
2881 | if (actual_rule_cnt < rule_cnt) | |
2882 | rule_cnt = actual_rule_cnt; | |
2883 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2884 | &rxnfc->rule_locs[0], | |
2885 | rule_cnt * sizeof(u32))) | |
2886 | return -EFAULT; | |
2887 | } | |
2888 | } | |
2889 | ||
2890 | return 0; | |
7a229387 AB |
2891 | } |
2892 | ||
7a50a240 AB |
2893 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2894 | { | |
2895 | void __user *uptr; | |
2896 | compat_uptr_t uptr32; | |
2897 | struct ifreq __user *uifr; | |
2898 | ||
c6d409cf | 2899 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2900 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2901 | return -EFAULT; | |
2902 | ||
2903 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2904 | return -EFAULT; | |
2905 | ||
2906 | uptr = compat_ptr(uptr32); | |
2907 | ||
2908 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2909 | return -EFAULT; | |
2910 | ||
2911 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2912 | } | |
2913 | ||
6b96018b AB |
2914 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2915 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2916 | { |
2917 | struct ifreq kifr; | |
7a229387 AB |
2918 | mm_segment_t old_fs; |
2919 | int err; | |
7a229387 AB |
2920 | |
2921 | switch (cmd) { | |
2922 | case SIOCBONDENSLAVE: | |
2923 | case SIOCBONDRELEASE: | |
2924 | case SIOCBONDSETHWADDR: | |
2925 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2926 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2927 | return -EFAULT; |
2928 | ||
2929 | old_fs = get_fs(); | |
c6d409cf | 2930 | set_fs(KERNEL_DS); |
c3f52ae6 | 2931 | err = dev_ioctl(net, cmd, |
2932 | (struct ifreq __user __force *) &kifr); | |
c6d409cf | 2933 | set_fs(old_fs); |
7a229387 AB |
2934 | |
2935 | return err; | |
7a229387 | 2936 | default: |
07d106d0 | 2937 | return -ENOIOCTLCMD; |
ccbd6a5a | 2938 | } |
7a229387 AB |
2939 | } |
2940 | ||
590d4693 BH |
2941 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
2942 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, | |
6b96018b | 2943 | struct compat_ifreq __user *u_ifreq32) |
7a229387 AB |
2944 | { |
2945 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2946 | char tmp_buf[IFNAMSIZ]; |
2947 | void __user *data64; | |
2948 | u32 data32; | |
2949 | ||
2950 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2951 | IFNAMSIZ)) | |
2952 | return -EFAULT; | |
417c3522 | 2953 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
7a229387 AB |
2954 | return -EFAULT; |
2955 | data64 = compat_ptr(data32); | |
2956 | ||
2957 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2958 | ||
7a229387 AB |
2959 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
2960 | IFNAMSIZ)) | |
2961 | return -EFAULT; | |
417c3522 | 2962 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
7a229387 AB |
2963 | return -EFAULT; |
2964 | ||
6b96018b | 2965 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2966 | } |
2967 | ||
6b96018b AB |
2968 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2969 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2970 | { |
a2116ed2 | 2971 | struct ifreq __user *uifr; |
7a229387 AB |
2972 | int err; |
2973 | ||
a2116ed2 AB |
2974 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2975 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2976 | return -EFAULT; | |
2977 | ||
2978 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2979 | ||
7a229387 AB |
2980 | if (!err) { |
2981 | switch (cmd) { | |
2982 | case SIOCGIFFLAGS: | |
2983 | case SIOCGIFMETRIC: | |
2984 | case SIOCGIFMTU: | |
2985 | case SIOCGIFMEM: | |
2986 | case SIOCGIFHWADDR: | |
2987 | case SIOCGIFINDEX: | |
2988 | case SIOCGIFADDR: | |
2989 | case SIOCGIFBRDADDR: | |
2990 | case SIOCGIFDSTADDR: | |
2991 | case SIOCGIFNETMASK: | |
fab2532b | 2992 | case SIOCGIFPFLAGS: |
7a229387 | 2993 | case SIOCGIFTXQLEN: |
fab2532b AB |
2994 | case SIOCGMIIPHY: |
2995 | case SIOCGMIIREG: | |
a2116ed2 | 2996 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2997 | err = -EFAULT; |
2998 | break; | |
2999 | } | |
3000 | } | |
3001 | return err; | |
3002 | } | |
3003 | ||
a2116ed2 AB |
3004 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
3005 | struct compat_ifreq __user *uifr32) | |
3006 | { | |
3007 | struct ifreq ifr; | |
3008 | struct compat_ifmap __user *uifmap32; | |
3009 | mm_segment_t old_fs; | |
3010 | int err; | |
3011 | ||
3012 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
3013 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3014 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3015 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3016 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3017 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3018 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3019 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3020 | if (err) |
3021 | return -EFAULT; | |
3022 | ||
3023 | old_fs = get_fs(); | |
c6d409cf | 3024 | set_fs(KERNEL_DS); |
c3f52ae6 | 3025 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
c6d409cf | 3026 | set_fs(old_fs); |
a2116ed2 AB |
3027 | |
3028 | if (cmd == SIOCGIFMAP && !err) { | |
3029 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
3030 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
3031 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
3032 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
3033 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
3034 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3035 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3036 | if (err) |
3037 | err = -EFAULT; | |
3038 | } | |
3039 | return err; | |
3040 | } | |
3041 | ||
7a229387 | 3042 | struct rtentry32 { |
c6d409cf | 3043 | u32 rt_pad1; |
7a229387 AB |
3044 | struct sockaddr rt_dst; /* target address */ |
3045 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3046 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3047 | unsigned short rt_flags; |
3048 | short rt_pad2; | |
3049 | u32 rt_pad3; | |
3050 | unsigned char rt_tos; | |
3051 | unsigned char rt_class; | |
3052 | short rt_pad4; | |
3053 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3054 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3055 | u32 rt_mtu; /* per route MTU/Window */ |
3056 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3057 | unsigned short rt_irtt; /* Initial RTT */ |
3058 | }; | |
3059 | ||
3060 | struct in6_rtmsg32 { | |
3061 | struct in6_addr rtmsg_dst; | |
3062 | struct in6_addr rtmsg_src; | |
3063 | struct in6_addr rtmsg_gateway; | |
3064 | u32 rtmsg_type; | |
3065 | u16 rtmsg_dst_len; | |
3066 | u16 rtmsg_src_len; | |
3067 | u32 rtmsg_metric; | |
3068 | u32 rtmsg_info; | |
3069 | u32 rtmsg_flags; | |
3070 | s32 rtmsg_ifindex; | |
3071 | }; | |
3072 | ||
6b96018b AB |
3073 | static int routing_ioctl(struct net *net, struct socket *sock, |
3074 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3075 | { |
3076 | int ret; | |
3077 | void *r = NULL; | |
3078 | struct in6_rtmsg r6; | |
3079 | struct rtentry r4; | |
3080 | char devname[16]; | |
3081 | u32 rtdev; | |
3082 | mm_segment_t old_fs = get_fs(); | |
3083 | ||
6b96018b AB |
3084 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3085 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3086 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3087 | 3 * sizeof(struct in6_addr)); |
3ddc5b46 MD |
3088 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3089 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3090 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3091 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3092 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3093 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3094 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3095 | |
3096 | r = (void *) &r6; | |
3097 | } else { /* ipv4 */ | |
6b96018b | 3098 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3099 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3100 | 3 * sizeof(struct sockaddr)); |
3ddc5b46 MD |
3101 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
3102 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3103 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3104 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); | |
3105 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3106 | ret |= get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3107 | if (rtdev) { |
c6d409cf | 3108 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3109 | r4.rt_dev = (char __user __force *)devname; |
3110 | devname[15] = 0; | |
7a229387 AB |
3111 | } else |
3112 | r4.rt_dev = NULL; | |
3113 | ||
3114 | r = (void *) &r4; | |
3115 | } | |
3116 | ||
3117 | if (ret) { | |
3118 | ret = -EFAULT; | |
3119 | goto out; | |
3120 | } | |
3121 | ||
c6d409cf | 3122 | set_fs(KERNEL_DS); |
6b96018b | 3123 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3124 | set_fs(old_fs); |
7a229387 AB |
3125 | |
3126 | out: | |
7a229387 AB |
3127 | return ret; |
3128 | } | |
3129 | ||
3130 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3131 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3132 | * use compatible ioctls |
7a229387 | 3133 | */ |
6b96018b | 3134 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3135 | { |
6b96018b | 3136 | compat_ulong_t tmp; |
7a229387 | 3137 | |
6b96018b | 3138 | if (get_user(tmp, argp)) |
7a229387 AB |
3139 | return -EFAULT; |
3140 | if (tmp == BRCTL_GET_VERSION) | |
3141 | return BRCTL_VERSION + 1; | |
3142 | return -EINVAL; | |
3143 | } | |
3144 | ||
6b96018b AB |
3145 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3146 | unsigned int cmd, unsigned long arg) | |
3147 | { | |
3148 | void __user *argp = compat_ptr(arg); | |
3149 | struct sock *sk = sock->sk; | |
3150 | struct net *net = sock_net(sk); | |
7a229387 | 3151 | |
6b96018b | 3152 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693 | 3153 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3154 | |
3155 | switch (cmd) { | |
3156 | case SIOCSIFBR: | |
3157 | case SIOCGIFBR: | |
3158 | return old_bridge_ioctl(argp); | |
3159 | case SIOCGIFNAME: | |
3160 | return dev_ifname32(net, argp); | |
3161 | case SIOCGIFCONF: | |
3162 | return dev_ifconf(net, argp); | |
3163 | case SIOCETHTOOL: | |
3164 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3165 | case SIOCWANDEV: |
3166 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3167 | case SIOCGIFMAP: |
3168 | case SIOCSIFMAP: | |
3169 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3170 | case SIOCBONDENSLAVE: |
3171 | case SIOCBONDRELEASE: | |
3172 | case SIOCBONDSETHWADDR: | |
6b96018b AB |
3173 | case SIOCBONDCHANGEACTIVE: |
3174 | return bond_ioctl(net, cmd, argp); | |
3175 | case SIOCADDRT: | |
3176 | case SIOCDELRT: | |
3177 | return routing_ioctl(net, sock, cmd, argp); | |
3178 | case SIOCGSTAMP: | |
3179 | return do_siocgstamp(net, sock, cmd, argp); | |
3180 | case SIOCGSTAMPNS: | |
3181 | return do_siocgstampns(net, sock, cmd, argp); | |
590d4693 BH |
3182 | case SIOCBONDSLAVEINFOQUERY: |
3183 | case SIOCBONDINFOQUERY: | |
a2116ed2 | 3184 | case SIOCSHWTSTAMP: |
fd468c74 | 3185 | case SIOCGHWTSTAMP: |
590d4693 | 3186 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3187 | |
3188 | case FIOSETOWN: | |
3189 | case SIOCSPGRP: | |
3190 | case FIOGETOWN: | |
3191 | case SIOCGPGRP: | |
3192 | case SIOCBRADDBR: | |
3193 | case SIOCBRDELBR: | |
3194 | case SIOCGIFVLAN: | |
3195 | case SIOCSIFVLAN: | |
3196 | case SIOCADDDLCI: | |
3197 | case SIOCDELDLCI: | |
c62cce2c | 3198 | case SIOCGSKNS: |
6b96018b AB |
3199 | return sock_ioctl(file, cmd, arg); |
3200 | ||
3201 | case SIOCGIFFLAGS: | |
3202 | case SIOCSIFFLAGS: | |
3203 | case SIOCGIFMETRIC: | |
3204 | case SIOCSIFMETRIC: | |
3205 | case SIOCGIFMTU: | |
3206 | case SIOCSIFMTU: | |
3207 | case SIOCGIFMEM: | |
3208 | case SIOCSIFMEM: | |
3209 | case SIOCGIFHWADDR: | |
3210 | case SIOCSIFHWADDR: | |
3211 | case SIOCADDMULTI: | |
3212 | case SIOCDELMULTI: | |
3213 | case SIOCGIFINDEX: | |
6b96018b AB |
3214 | case SIOCGIFADDR: |
3215 | case SIOCSIFADDR: | |
3216 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3217 | case SIOCDIFADDR: |
6b96018b AB |
3218 | case SIOCGIFBRDADDR: |
3219 | case SIOCSIFBRDADDR: | |
3220 | case SIOCGIFDSTADDR: | |
3221 | case SIOCSIFDSTADDR: | |
3222 | case SIOCGIFNETMASK: | |
3223 | case SIOCSIFNETMASK: | |
3224 | case SIOCSIFPFLAGS: | |
3225 | case SIOCGIFPFLAGS: | |
3226 | case SIOCGIFTXQLEN: | |
3227 | case SIOCSIFTXQLEN: | |
3228 | case SIOCBRADDIF: | |
3229 | case SIOCBRDELIF: | |
9177efd3 AB |
3230 | case SIOCSIFNAME: |
3231 | case SIOCGMIIPHY: | |
3232 | case SIOCGMIIREG: | |
3233 | case SIOCSMIIREG: | |
6b96018b | 3234 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 3235 | |
6b96018b AB |
3236 | case SIOCSARP: |
3237 | case SIOCGARP: | |
3238 | case SIOCDARP: | |
6b96018b | 3239 | case SIOCATMARK: |
9177efd3 AB |
3240 | return sock_do_ioctl(net, sock, cmd, arg); |
3241 | } | |
3242 | ||
6b96018b AB |
3243 | return -ENOIOCTLCMD; |
3244 | } | |
7a229387 | 3245 | |
95c96174 | 3246 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3247 | unsigned long arg) |
89bbfc95 SP |
3248 | { |
3249 | struct socket *sock = file->private_data; | |
3250 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3251 | struct sock *sk; |
3252 | struct net *net; | |
3253 | ||
3254 | sk = sock->sk; | |
3255 | net = sock_net(sk); | |
89bbfc95 SP |
3256 | |
3257 | if (sock->ops->compat_ioctl) | |
3258 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3259 | ||
87de87d5 DM |
3260 | if (ret == -ENOIOCTLCMD && |
3261 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3262 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3263 | ||
6b96018b AB |
3264 | if (ret == -ENOIOCTLCMD) |
3265 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3266 | ||
89bbfc95 SP |
3267 | return ret; |
3268 | } | |
3269 | #endif | |
3270 | ||
ac5a488e SS |
3271 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3272 | { | |
3273 | return sock->ops->bind(sock, addr, addrlen); | |
3274 | } | |
c6d409cf | 3275 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3276 | |
3277 | int kernel_listen(struct socket *sock, int backlog) | |
3278 | { | |
3279 | return sock->ops->listen(sock, backlog); | |
3280 | } | |
c6d409cf | 3281 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3282 | |
3283 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3284 | { | |
3285 | struct sock *sk = sock->sk; | |
3286 | int err; | |
3287 | ||
3288 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3289 | newsock); | |
3290 | if (err < 0) | |
3291 | goto done; | |
3292 | ||
cdfbabfb | 3293 | err = sock->ops->accept(sock, *newsock, flags, true); |
ac5a488e SS |
3294 | if (err < 0) { |
3295 | sock_release(*newsock); | |
fa8705b0 | 3296 | *newsock = NULL; |
ac5a488e SS |
3297 | goto done; |
3298 | } | |
3299 | ||
3300 | (*newsock)->ops = sock->ops; | |
1b08534e | 3301 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3302 | |
3303 | done: | |
3304 | return err; | |
3305 | } | |
c6d409cf | 3306 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3307 | |
3308 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3309 | int flags) |
ac5a488e SS |
3310 | { |
3311 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3312 | } | |
c6d409cf | 3313 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3314 | |
3315 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3316 | int *addrlen) | |
3317 | { | |
3318 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3319 | } | |
c6d409cf | 3320 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3321 | |
3322 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3323 | int *addrlen) | |
3324 | { | |
3325 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3326 | } | |
c6d409cf | 3327 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3328 | |
3329 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3330 | char *optval, int *optlen) | |
3331 | { | |
3332 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3333 | char __user *uoptval; |
3334 | int __user *uoptlen; | |
ac5a488e SS |
3335 | int err; |
3336 | ||
fb8621bb NK |
3337 | uoptval = (char __user __force *) optval; |
3338 | uoptlen = (int __user __force *) optlen; | |
3339 | ||
ac5a488e SS |
3340 | set_fs(KERNEL_DS); |
3341 | if (level == SOL_SOCKET) | |
fb8621bb | 3342 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3343 | else |
fb8621bb NK |
3344 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3345 | uoptlen); | |
ac5a488e SS |
3346 | set_fs(oldfs); |
3347 | return err; | |
3348 | } | |
c6d409cf | 3349 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3350 | |
3351 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3352 | char *optval, unsigned int optlen) |
ac5a488e SS |
3353 | { |
3354 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3355 | char __user *uoptval; |
ac5a488e SS |
3356 | int err; |
3357 | ||
fb8621bb NK |
3358 | uoptval = (char __user __force *) optval; |
3359 | ||
ac5a488e SS |
3360 | set_fs(KERNEL_DS); |
3361 | if (level == SOL_SOCKET) | |
fb8621bb | 3362 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3363 | else |
fb8621bb | 3364 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3365 | optlen); |
3366 | set_fs(oldfs); | |
3367 | return err; | |
3368 | } | |
c6d409cf | 3369 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3370 | |
3371 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3372 | size_t size, int flags) | |
3373 | { | |
3374 | if (sock->ops->sendpage) | |
3375 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3376 | ||
3377 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3378 | } | |
c6d409cf | 3379 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e | 3380 | |
306b13eb TH |
3381 | int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset, |
3382 | size_t size, int flags) | |
3383 | { | |
3384 | struct socket *sock = sk->sk_socket; | |
3385 | ||
3386 | if (sock->ops->sendpage_locked) | |
3387 | return sock->ops->sendpage_locked(sk, page, offset, size, | |
3388 | flags); | |
3389 | ||
3390 | return sock_no_sendpage_locked(sk, page, offset, size, flags); | |
3391 | } | |
3392 | EXPORT_SYMBOL(kernel_sendpage_locked); | |
3393 | ||
ac5a488e SS |
3394 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
3395 | { | |
3396 | mm_segment_t oldfs = get_fs(); | |
3397 | int err; | |
3398 | ||
3399 | set_fs(KERNEL_DS); | |
3400 | err = sock->ops->ioctl(sock, cmd, arg); | |
3401 | set_fs(oldfs); | |
3402 | ||
3403 | return err; | |
3404 | } | |
c6d409cf | 3405 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3406 | |
91cf45f0 TM |
3407 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3408 | { | |
3409 | return sock->ops->shutdown(sock, how); | |
3410 | } | |
91cf45f0 | 3411 | EXPORT_SYMBOL(kernel_sock_shutdown); |
113c3075 P |
3412 | |
3413 | /* This routine returns the IP overhead imposed by a socket i.e. | |
3414 | * the length of the underlying IP header, depending on whether | |
3415 | * this is an IPv4 or IPv6 socket and the length from IP options turned | |
57240d00 | 3416 | * on at the socket. Assumes that the caller has a lock on the socket. |
113c3075 P |
3417 | */ |
3418 | u32 kernel_sock_ip_overhead(struct sock *sk) | |
3419 | { | |
3420 | struct inet_sock *inet; | |
3421 | struct ip_options_rcu *opt; | |
3422 | u32 overhead = 0; | |
113c3075 P |
3423 | #if IS_ENABLED(CONFIG_IPV6) |
3424 | struct ipv6_pinfo *np; | |
3425 | struct ipv6_txoptions *optv6 = NULL; | |
3426 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
3427 | ||
3428 | if (!sk) | |
3429 | return overhead; | |
3430 | ||
113c3075 P |
3431 | switch (sk->sk_family) { |
3432 | case AF_INET: | |
3433 | inet = inet_sk(sk); | |
3434 | overhead += sizeof(struct iphdr); | |
3435 | opt = rcu_dereference_protected(inet->inet_opt, | |
614d79c0 | 3436 | sock_owned_by_user(sk)); |
113c3075 P |
3437 | if (opt) |
3438 | overhead += opt->opt.optlen; | |
3439 | return overhead; | |
3440 | #if IS_ENABLED(CONFIG_IPV6) | |
3441 | case AF_INET6: | |
3442 | np = inet6_sk(sk); | |
3443 | overhead += sizeof(struct ipv6hdr); | |
3444 | if (np) | |
3445 | optv6 = rcu_dereference_protected(np->opt, | |
614d79c0 | 3446 | sock_owned_by_user(sk)); |
113c3075 P |
3447 | if (optv6) |
3448 | overhead += (optv6->opt_flen + optv6->opt_nflen); | |
3449 | return overhead; | |
3450 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
3451 | default: /* Returns 0 overhead if the socket is not ipv4 or ipv6 */ | |
3452 | return overhead; | |
3453 | } | |
3454 | } | |
3455 | EXPORT_SYMBOL(kernel_sock_ip_overhead); |