Commit | Line | Data |
---|---|---|
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 | 106 | #include <linux/sockios.h> |
076bb0c8 | 107 | #include <net/busy_poll.h> |
f24b9be5 | 108 | #include <linux/errqueue.h> |
06021292 | 109 | |
e0d1095a | 110 | #ifdef CONFIG_NET_RX_BUSY_POLL |
64b0dc51 ET |
111 | unsigned int sysctl_net_busy_read __read_mostly; |
112 | unsigned int sysctl_net_busy_poll __read_mostly; | |
06021292 | 113 | #endif |
6b96018b | 114 | |
8ae5e030 AV |
115 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to); |
116 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from); | |
89bddce5 | 117 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
118 | |
119 | static int sock_close(struct inode *inode, struct file *file); | |
a11e1d43 LT |
120 | static __poll_t sock_poll(struct file *file, |
121 | struct poll_table_struct *wait); | |
89bddce5 | 122 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
123 | #ifdef CONFIG_COMPAT |
124 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 125 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 126 | #endif |
1da177e4 | 127 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
128 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
129 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 130 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 131 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 132 | unsigned int flags); |
1da177e4 | 133 | |
1da177e4 LT |
134 | /* |
135 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
136 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
137 | */ | |
138 | ||
da7071d7 | 139 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
140 | .owner = THIS_MODULE, |
141 | .llseek = no_llseek, | |
8ae5e030 AV |
142 | .read_iter = sock_read_iter, |
143 | .write_iter = sock_write_iter, | |
1da177e4 LT |
144 | .poll = sock_poll, |
145 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
146 | #ifdef CONFIG_COMPAT |
147 | .compat_ioctl = compat_sock_ioctl, | |
148 | #endif | |
1da177e4 | 149 | .mmap = sock_mmap, |
1da177e4 LT |
150 | .release = sock_close, |
151 | .fasync = sock_fasync, | |
5274f052 JA |
152 | .sendpage = sock_sendpage, |
153 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 154 | .splice_read = sock_splice_read, |
1da177e4 LT |
155 | }; |
156 | ||
157 | /* | |
158 | * The protocol list. Each protocol is registered in here. | |
159 | */ | |
160 | ||
1da177e4 | 161 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 162 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 163 | |
1da177e4 | 164 | /* |
89bddce5 SH |
165 | * Support routines. |
166 | * Move socket addresses back and forth across the kernel/user | |
167 | * divide and look after the messy bits. | |
1da177e4 LT |
168 | */ |
169 | ||
1da177e4 LT |
170 | /** |
171 | * move_addr_to_kernel - copy a socket address into kernel space | |
172 | * @uaddr: Address in user space | |
173 | * @kaddr: Address in kernel space | |
174 | * @ulen: Length in user space | |
175 | * | |
176 | * The address is copied into kernel space. If the provided address is | |
177 | * too long an error code of -EINVAL is returned. If the copy gives | |
178 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
179 | */ | |
180 | ||
43db362d | 181 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
1da177e4 | 182 | { |
230b1839 | 183 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 184 | return -EINVAL; |
89bddce5 | 185 | if (ulen == 0) |
1da177e4 | 186 | return 0; |
89bddce5 | 187 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 188 | return -EFAULT; |
3ec3b2fb | 189 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
190 | } |
191 | ||
192 | /** | |
193 | * move_addr_to_user - copy an address to user space | |
194 | * @kaddr: kernel space address | |
195 | * @klen: length of address in kernel | |
196 | * @uaddr: user space address | |
197 | * @ulen: pointer to user length field | |
198 | * | |
199 | * The value pointed to by ulen on entry is the buffer length available. | |
200 | * This is overwritten with the buffer space used. -EINVAL is returned | |
201 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
202 | * is returned if either the buffer or the length field are not | |
203 | * accessible. | |
204 | * After copying the data up to the limit the user specifies, the true | |
205 | * length of the data is written over the length limit the user | |
206 | * specified. Zero is returned for a success. | |
207 | */ | |
89bddce5 | 208 | |
43db362d | 209 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
11165f14 | 210 | void __user *uaddr, int __user *ulen) |
1da177e4 LT |
211 | { |
212 | int err; | |
213 | int len; | |
214 | ||
68c6beb3 | 215 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
89bddce5 SH |
216 | err = get_user(len, ulen); |
217 | if (err) | |
1da177e4 | 218 | return err; |
89bddce5 SH |
219 | if (len > klen) |
220 | len = klen; | |
68c6beb3 | 221 | if (len < 0) |
1da177e4 | 222 | return -EINVAL; |
89bddce5 | 223 | if (len) { |
d6fe3945 SG |
224 | if (audit_sockaddr(klen, kaddr)) |
225 | return -ENOMEM; | |
89bddce5 | 226 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
227 | return -EFAULT; |
228 | } | |
229 | /* | |
89bddce5 SH |
230 | * "fromlen shall refer to the value before truncation.." |
231 | * 1003.1g | |
1da177e4 LT |
232 | */ |
233 | return __put_user(klen, ulen); | |
234 | } | |
235 | ||
08009a76 | 236 | static struct kmem_cache *sock_inode_cachep __ro_after_init; |
1da177e4 LT |
237 | |
238 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
239 | { | |
240 | struct socket_alloc *ei; | |
eaefd110 | 241 | struct socket_wq *wq; |
89bddce5 | 242 | |
e94b1766 | 243 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
244 | if (!ei) |
245 | return NULL; | |
eaefd110 ED |
246 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
247 | if (!wq) { | |
43815482 ED |
248 | kmem_cache_free(sock_inode_cachep, ei); |
249 | return NULL; | |
250 | } | |
eaefd110 ED |
251 | init_waitqueue_head(&wq->wait); |
252 | wq->fasync_list = NULL; | |
574aab1e | 253 | wq->flags = 0; |
eaefd110 | 254 | RCU_INIT_POINTER(ei->socket.wq, wq); |
89bddce5 | 255 | |
1da177e4 LT |
256 | ei->socket.state = SS_UNCONNECTED; |
257 | ei->socket.flags = 0; | |
258 | ei->socket.ops = NULL; | |
259 | ei->socket.sk = NULL; | |
260 | ei->socket.file = NULL; | |
1da177e4 LT |
261 | |
262 | return &ei->vfs_inode; | |
263 | } | |
264 | ||
265 | static void sock_destroy_inode(struct inode *inode) | |
266 | { | |
43815482 | 267 | struct socket_alloc *ei; |
eaefd110 | 268 | struct socket_wq *wq; |
43815482 ED |
269 | |
270 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 | 271 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
61845220 | 272 | kfree_rcu(wq, rcu); |
43815482 | 273 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
274 | } |
275 | ||
51cc5068 | 276 | static void init_once(void *foo) |
1da177e4 | 277 | { |
89bddce5 | 278 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 279 | |
a35afb83 | 280 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 281 | } |
89bddce5 | 282 | |
1e911632 | 283 | static void init_inodecache(void) |
1da177e4 LT |
284 | { |
285 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
286 | sizeof(struct socket_alloc), |
287 | 0, | |
288 | (SLAB_HWCACHE_ALIGN | | |
289 | SLAB_RECLAIM_ACCOUNT | | |
5d097056 | 290 | SLAB_MEM_SPREAD | SLAB_ACCOUNT), |
20c2df83 | 291 | init_once); |
1e911632 | 292 | BUG_ON(sock_inode_cachep == NULL); |
1da177e4 LT |
293 | } |
294 | ||
b87221de | 295 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
296 | .alloc_inode = sock_alloc_inode, |
297 | .destroy_inode = sock_destroy_inode, | |
298 | .statfs = simple_statfs, | |
1da177e4 LT |
299 | }; |
300 | ||
c23fbb6b ED |
301 | /* |
302 | * sockfs_dname() is called from d_path(). | |
303 | */ | |
304 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
305 | { | |
306 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
c5ef6035 | 307 | d_inode(dentry)->i_ino); |
c23fbb6b ED |
308 | } |
309 | ||
3ba13d17 | 310 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 311 | .d_dname = sockfs_dname, |
1da177e4 LT |
312 | }; |
313 | ||
bba0bd31 AG |
314 | static int sockfs_xattr_get(const struct xattr_handler *handler, |
315 | struct dentry *dentry, struct inode *inode, | |
316 | const char *suffix, void *value, size_t size) | |
317 | { | |
318 | if (value) { | |
319 | if (dentry->d_name.len + 1 > size) | |
320 | return -ERANGE; | |
321 | memcpy(value, dentry->d_name.name, dentry->d_name.len + 1); | |
322 | } | |
323 | return dentry->d_name.len + 1; | |
324 | } | |
325 | ||
326 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" | |
327 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) | |
328 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) | |
329 | ||
330 | static const struct xattr_handler sockfs_xattr_handler = { | |
331 | .name = XATTR_NAME_SOCKPROTONAME, | |
332 | .get = sockfs_xattr_get, | |
333 | }; | |
334 | ||
4a590153 AG |
335 | static int sockfs_security_xattr_set(const struct xattr_handler *handler, |
336 | struct dentry *dentry, struct inode *inode, | |
337 | const char *suffix, const void *value, | |
338 | size_t size, int flags) | |
339 | { | |
340 | /* Handled by LSM. */ | |
341 | return -EAGAIN; | |
342 | } | |
343 | ||
344 | static const struct xattr_handler sockfs_security_xattr_handler = { | |
345 | .prefix = XATTR_SECURITY_PREFIX, | |
346 | .set = sockfs_security_xattr_set, | |
347 | }; | |
348 | ||
bba0bd31 AG |
349 | static const struct xattr_handler *sockfs_xattr_handlers[] = { |
350 | &sockfs_xattr_handler, | |
4a590153 | 351 | &sockfs_security_xattr_handler, |
bba0bd31 AG |
352 | NULL |
353 | }; | |
354 | ||
c74a1cbb AV |
355 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
356 | int flags, const char *dev_name, void *data) | |
357 | { | |
bba0bd31 AG |
358 | return mount_pseudo_xattr(fs_type, "socket:", &sockfs_ops, |
359 | sockfs_xattr_handlers, | |
360 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
c74a1cbb AV |
361 | } |
362 | ||
363 | static struct vfsmount *sock_mnt __read_mostly; | |
364 | ||
365 | static struct file_system_type sock_fs_type = { | |
366 | .name = "sockfs", | |
367 | .mount = sockfs_mount, | |
368 | .kill_sb = kill_anon_super, | |
369 | }; | |
370 | ||
1da177e4 LT |
371 | /* |
372 | * Obtains the first available file descriptor and sets it up for use. | |
373 | * | |
39d8c1b6 DM |
374 | * These functions create file structures and maps them to fd space |
375 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
376 | * and file struct implicitly stored in sock->file. |
377 | * Note that another thread may close file descriptor before we return | |
378 | * from this function. We use the fact that now we do not refer | |
379 | * to socket after mapping. If one day we will need it, this | |
380 | * function will increment ref. count on file by 1. | |
381 | * | |
382 | * In any case returned fd MAY BE not valid! | |
383 | * This race condition is unavoidable | |
384 | * with shared fd spaces, we cannot solve it inside kernel, | |
385 | * but we take care of internal coherence yet. | |
386 | */ | |
387 | ||
aab174f0 | 388 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
1da177e4 | 389 | { |
7cbe66b6 | 390 | struct qstr name = { .name = "" }; |
2c48b9c4 | 391 | struct path path; |
7cbe66b6 | 392 | struct file *file; |
1da177e4 | 393 | |
600e1779 MY |
394 | if (dname) { |
395 | name.name = dname; | |
396 | name.len = strlen(name.name); | |
397 | } else if (sock->sk) { | |
398 | name.name = sock->sk->sk_prot_creator->name; | |
399 | name.len = strlen(name.name); | |
400 | } | |
4b936885 | 401 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
8e1611e2 AV |
402 | if (unlikely(!path.dentry)) { |
403 | sock_release(sock); | |
28407630 | 404 | return ERR_PTR(-ENOMEM); |
8e1611e2 | 405 | } |
2c48b9c4 | 406 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 407 | |
2c48b9c4 | 408 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
39d8c1b6 | 409 | |
2c48b9c4 | 410 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 411 | &socket_file_ops); |
b5ffe634 | 412 | if (IS_ERR(file)) { |
8e1611e2 | 413 | /* drop dentry, keep inode for a bit */ |
c5ef6035 | 414 | ihold(d_inode(path.dentry)); |
2c48b9c4 | 415 | path_put(&path); |
8e1611e2 AV |
416 | /* ... and now kill it properly */ |
417 | sock_release(sock); | |
39b65252 | 418 | return file; |
cc3808f8 AV |
419 | } |
420 | ||
421 | sock->file = file; | |
77d27200 | 422 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 | 423 | file->private_data = sock; |
28407630 | 424 | return file; |
39d8c1b6 | 425 | } |
56b31d1c | 426 | EXPORT_SYMBOL(sock_alloc_file); |
39d8c1b6 | 427 | |
56b31d1c | 428 | static int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
429 | { |
430 | struct file *newfile; | |
28407630 | 431 | int fd = get_unused_fd_flags(flags); |
ce4bb04c AV |
432 | if (unlikely(fd < 0)) { |
433 | sock_release(sock); | |
28407630 | 434 | return fd; |
ce4bb04c | 435 | } |
39d8c1b6 | 436 | |
aab174f0 | 437 | newfile = sock_alloc_file(sock, flags, NULL); |
28407630 | 438 | if (likely(!IS_ERR(newfile))) { |
39d8c1b6 | 439 | fd_install(fd, newfile); |
28407630 AV |
440 | return fd; |
441 | } | |
7cbe66b6 | 442 | |
28407630 AV |
443 | put_unused_fd(fd); |
444 | return PTR_ERR(newfile); | |
1da177e4 LT |
445 | } |
446 | ||
406a3c63 | 447 | struct socket *sock_from_file(struct file *file, int *err) |
6cb153ca | 448 | { |
6cb153ca BL |
449 | if (file->f_op == &socket_file_ops) |
450 | return file->private_data; /* set in sock_map_fd */ | |
451 | ||
23bb80d2 ED |
452 | *err = -ENOTSOCK; |
453 | return NULL; | |
6cb153ca | 454 | } |
406a3c63 | 455 | EXPORT_SYMBOL(sock_from_file); |
6cb153ca | 456 | |
1da177e4 | 457 | /** |
c6d409cf | 458 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
459 | * @fd: file handle |
460 | * @err: pointer to an error code return | |
461 | * | |
462 | * The file handle passed in is locked and the socket it is bound | |
241c4667 | 463 | * to is returned. If an error occurs the err pointer is overwritten |
1da177e4 LT |
464 | * with a negative errno code and NULL is returned. The function checks |
465 | * for both invalid handles and passing a handle which is not a socket. | |
466 | * | |
467 | * On a success the socket object pointer is returned. | |
468 | */ | |
469 | ||
470 | struct socket *sockfd_lookup(int fd, int *err) | |
471 | { | |
472 | struct file *file; | |
1da177e4 LT |
473 | struct socket *sock; |
474 | ||
89bddce5 SH |
475 | file = fget(fd); |
476 | if (!file) { | |
1da177e4 LT |
477 | *err = -EBADF; |
478 | return NULL; | |
479 | } | |
89bddce5 | 480 | |
6cb153ca BL |
481 | sock = sock_from_file(file, err); |
482 | if (!sock) | |
1da177e4 | 483 | fput(file); |
6cb153ca BL |
484 | return sock; |
485 | } | |
c6d409cf | 486 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 487 | |
6cb153ca BL |
488 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
489 | { | |
00e188ef | 490 | struct fd f = fdget(fd); |
6cb153ca BL |
491 | struct socket *sock; |
492 | ||
3672558c | 493 | *err = -EBADF; |
00e188ef AV |
494 | if (f.file) { |
495 | sock = sock_from_file(f.file, err); | |
496 | if (likely(sock)) { | |
497 | *fput_needed = f.flags; | |
6cb153ca | 498 | return sock; |
00e188ef AV |
499 | } |
500 | fdput(f); | |
1da177e4 | 501 | } |
6cb153ca | 502 | return NULL; |
1da177e4 LT |
503 | } |
504 | ||
600e1779 MY |
505 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, |
506 | size_t size) | |
507 | { | |
508 | ssize_t len; | |
509 | ssize_t used = 0; | |
510 | ||
c5ef6035 | 511 | len = security_inode_listsecurity(d_inode(dentry), buffer, size); |
600e1779 MY |
512 | if (len < 0) |
513 | return len; | |
514 | used += len; | |
515 | if (buffer) { | |
516 | if (size < used) | |
517 | return -ERANGE; | |
518 | buffer += len; | |
519 | } | |
520 | ||
521 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); | |
522 | used += len; | |
523 | if (buffer) { | |
524 | if (size < used) | |
525 | return -ERANGE; | |
526 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); | |
527 | buffer += len; | |
528 | } | |
529 | ||
530 | return used; | |
531 | } | |
532 | ||
dc647ec8 | 533 | static int sockfs_setattr(struct dentry *dentry, struct iattr *iattr) |
86741ec2 LC |
534 | { |
535 | int err = simple_setattr(dentry, iattr); | |
536 | ||
e1a3a60a | 537 | if (!err && (iattr->ia_valid & ATTR_UID)) { |
86741ec2 LC |
538 | struct socket *sock = SOCKET_I(d_inode(dentry)); |
539 | ||
6d8c50dc CW |
540 | if (sock->sk) |
541 | sock->sk->sk_uid = iattr->ia_uid; | |
542 | else | |
543 | err = -ENOENT; | |
86741ec2 LC |
544 | } |
545 | ||
546 | return err; | |
547 | } | |
548 | ||
600e1779 | 549 | static const struct inode_operations sockfs_inode_ops = { |
600e1779 | 550 | .listxattr = sockfs_listxattr, |
86741ec2 | 551 | .setattr = sockfs_setattr, |
600e1779 MY |
552 | }; |
553 | ||
1da177e4 LT |
554 | /** |
555 | * sock_alloc - allocate a socket | |
89bddce5 | 556 | * |
1da177e4 LT |
557 | * Allocate a new inode and socket object. The two are bound together |
558 | * and initialised. The socket is then returned. If we are out of inodes | |
559 | * NULL is returned. | |
560 | */ | |
561 | ||
f4a00aac | 562 | struct socket *sock_alloc(void) |
1da177e4 | 563 | { |
89bddce5 SH |
564 | struct inode *inode; |
565 | struct socket *sock; | |
1da177e4 | 566 | |
a209dfc7 | 567 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
1da177e4 LT |
568 | if (!inode) |
569 | return NULL; | |
570 | ||
571 | sock = SOCKET_I(inode); | |
572 | ||
85fe4025 | 573 | inode->i_ino = get_next_ino(); |
89bddce5 | 574 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
575 | inode->i_uid = current_fsuid(); |
576 | inode->i_gid = current_fsgid(); | |
600e1779 | 577 | inode->i_op = &sockfs_inode_ops; |
1da177e4 | 578 | |
1da177e4 LT |
579 | return sock; |
580 | } | |
f4a00aac | 581 | EXPORT_SYMBOL(sock_alloc); |
1da177e4 | 582 | |
1da177e4 LT |
583 | /** |
584 | * sock_release - close a socket | |
585 | * @sock: socket to close | |
586 | * | |
587 | * The socket is released from the protocol stack if it has a release | |
588 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 589 | * an inode not a file. |
1da177e4 | 590 | */ |
89bddce5 | 591 | |
6d8c50dc | 592 | static void __sock_release(struct socket *sock, struct inode *inode) |
1da177e4 LT |
593 | { |
594 | if (sock->ops) { | |
595 | struct module *owner = sock->ops->owner; | |
596 | ||
6d8c50dc CW |
597 | if (inode) |
598 | inode_lock(inode); | |
1da177e4 | 599 | sock->ops->release(sock); |
6d8c50dc CW |
600 | if (inode) |
601 | inode_unlock(inode); | |
1da177e4 LT |
602 | sock->ops = NULL; |
603 | module_put(owner); | |
604 | } | |
605 | ||
eaefd110 | 606 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
3410f22e | 607 | pr_err("%s: fasync list not empty!\n", __func__); |
1da177e4 | 608 | |
1da177e4 LT |
609 | if (!sock->file) { |
610 | iput(SOCK_INODE(sock)); | |
611 | return; | |
612 | } | |
89bddce5 | 613 | sock->file = NULL; |
1da177e4 | 614 | } |
6d8c50dc CW |
615 | |
616 | void sock_release(struct socket *sock) | |
617 | { | |
618 | __sock_release(sock, NULL); | |
619 | } | |
c6d409cf | 620 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 621 | |
c14ac945 | 622 | void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags) |
20d49473 | 623 | { |
140c55d4 ED |
624 | u8 flags = *tx_flags; |
625 | ||
c14ac945 | 626 | if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
140c55d4 ED |
627 | flags |= SKBTX_HW_TSTAMP; |
628 | ||
c14ac945 | 629 | if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
140c55d4 ED |
630 | flags |= SKBTX_SW_TSTAMP; |
631 | ||
c14ac945 | 632 | if (tsflags & SOF_TIMESTAMPING_TX_SCHED) |
140c55d4 ED |
633 | flags |= SKBTX_SCHED_TSTAMP; |
634 | ||
140c55d4 | 635 | *tx_flags = flags; |
20d49473 | 636 | } |
67cc0d40 | 637 | EXPORT_SYMBOL(__sock_tx_timestamp); |
20d49473 | 638 | |
d8725c86 | 639 | static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg) |
1da177e4 | 640 | { |
01e97e65 | 641 | int ret = sock->ops->sendmsg(sock, msg, msg_data_left(msg)); |
d8725c86 AV |
642 | BUG_ON(ret == -EIOCBQUEUED); |
643 | return ret; | |
1da177e4 LT |
644 | } |
645 | ||
d8725c86 | 646 | int sock_sendmsg(struct socket *sock, struct msghdr *msg) |
228e548e | 647 | { |
d8725c86 | 648 | int err = security_socket_sendmsg(sock, msg, |
01e97e65 | 649 | msg_data_left(msg)); |
228e548e | 650 | |
d8725c86 | 651 | return err ?: sock_sendmsg_nosec(sock, msg); |
0cf00c6f | 652 | } |
c6d409cf | 653 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 LT |
654 | |
655 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
656 | struct kvec *vec, size_t num, size_t size) | |
657 | { | |
6aa24814 | 658 | iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size); |
d8725c86 | 659 | return sock_sendmsg(sock, msg); |
1da177e4 | 660 | } |
c6d409cf | 661 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 662 | |
306b13eb TH |
663 | int kernel_sendmsg_locked(struct sock *sk, struct msghdr *msg, |
664 | struct kvec *vec, size_t num, size_t size) | |
665 | { | |
666 | struct socket *sock = sk->sk_socket; | |
667 | ||
668 | if (!sock->ops->sendmsg_locked) | |
db5980d8 | 669 | return sock_no_sendmsg_locked(sk, msg, size); |
306b13eb TH |
670 | |
671 | iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size); | |
672 | ||
673 | return sock->ops->sendmsg_locked(sk, msg, msg_data_left(msg)); | |
674 | } | |
675 | EXPORT_SYMBOL(kernel_sendmsg_locked); | |
676 | ||
8605330a SHY |
677 | static bool skb_is_err_queue(const struct sk_buff *skb) |
678 | { | |
679 | /* pkt_type of skbs enqueued on the error queue are set to | |
680 | * PACKET_OUTGOING in skb_set_err_queue(). This is only safe to do | |
681 | * in recvmsg, since skbs received on a local socket will never | |
682 | * have a pkt_type of PACKET_OUTGOING. | |
683 | */ | |
684 | return skb->pkt_type == PACKET_OUTGOING; | |
685 | } | |
686 | ||
b50a5c70 ML |
687 | /* On transmit, software and hardware timestamps are returned independently. |
688 | * As the two skb clones share the hardware timestamp, which may be updated | |
689 | * before the software timestamp is received, a hardware TX timestamp may be | |
690 | * returned only if there is no software TX timestamp. Ignore false software | |
691 | * timestamps, which may be made in the __sock_recv_timestamp() call when the | |
692 | * option SO_TIMESTAMP(NS) is enabled on the socket, even when the skb has a | |
693 | * hardware timestamp. | |
694 | */ | |
695 | static bool skb_is_swtx_tstamp(const struct sk_buff *skb, int false_tstamp) | |
696 | { | |
697 | return skb->tstamp && !false_tstamp && skb_is_err_queue(skb); | |
698 | } | |
699 | ||
aad9c8c4 ML |
700 | static void put_ts_pktinfo(struct msghdr *msg, struct sk_buff *skb) |
701 | { | |
702 | struct scm_ts_pktinfo ts_pktinfo; | |
703 | struct net_device *orig_dev; | |
704 | ||
705 | if (!skb_mac_header_was_set(skb)) | |
706 | return; | |
707 | ||
708 | memset(&ts_pktinfo, 0, sizeof(ts_pktinfo)); | |
709 | ||
710 | rcu_read_lock(); | |
711 | orig_dev = dev_get_by_napi_id(skb_napi_id(skb)); | |
712 | if (orig_dev) | |
713 | ts_pktinfo.if_index = orig_dev->ifindex; | |
714 | rcu_read_unlock(); | |
715 | ||
716 | ts_pktinfo.pkt_length = skb->len - skb_mac_offset(skb); | |
717 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_PKTINFO, | |
718 | sizeof(ts_pktinfo), &ts_pktinfo); | |
719 | } | |
720 | ||
92f37fd2 ED |
721 | /* |
722 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
723 | */ | |
724 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
725 | struct sk_buff *skb) | |
726 | { | |
20d49473 | 727 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
f24b9be5 | 728 | struct scm_timestamping tss; |
b50a5c70 | 729 | int empty = 1, false_tstamp = 0; |
20d49473 PO |
730 | struct skb_shared_hwtstamps *shhwtstamps = |
731 | skb_hwtstamps(skb); | |
732 | ||
733 | /* Race occurred between timestamp enabling and packet | |
734 | receiving. Fill in the current time for now. */ | |
b50a5c70 | 735 | if (need_software_tstamp && skb->tstamp == 0) { |
20d49473 | 736 | __net_timestamp(skb); |
b50a5c70 ML |
737 | false_tstamp = 1; |
738 | } | |
20d49473 PO |
739 | |
740 | if (need_software_tstamp) { | |
741 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
742 | struct timeval tv; | |
743 | skb_get_timestamp(skb, &tv); | |
744 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
745 | sizeof(tv), &tv); | |
746 | } else { | |
f24b9be5 WB |
747 | struct timespec ts; |
748 | skb_get_timestampns(skb, &ts); | |
20d49473 | 749 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
f24b9be5 | 750 | sizeof(ts), &ts); |
20d49473 PO |
751 | } |
752 | } | |
753 | ||
f24b9be5 | 754 | memset(&tss, 0, sizeof(tss)); |
c199105d | 755 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
f24b9be5 | 756 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
20d49473 | 757 | empty = 0; |
4d276eb6 | 758 | if (shhwtstamps && |
b9f40e21 | 759 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
b50a5c70 | 760 | !skb_is_swtx_tstamp(skb, false_tstamp) && |
aad9c8c4 | 761 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) { |
4d276eb6 | 762 | empty = 0; |
aad9c8c4 ML |
763 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_OPT_PKTINFO) && |
764 | !skb_is_err_queue(skb)) | |
765 | put_ts_pktinfo(msg, skb); | |
766 | } | |
1c885808 | 767 | if (!empty) { |
20d49473 | 768 | put_cmsg(msg, SOL_SOCKET, |
f24b9be5 | 769 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
1c885808 | 770 | |
8605330a | 771 | if (skb_is_err_queue(skb) && skb->len && |
4ef1b286 | 772 | SKB_EXT_ERR(skb)->opt_stats) |
1c885808 FY |
773 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPING_OPT_STATS, |
774 | skb->len, skb->data); | |
775 | } | |
92f37fd2 | 776 | } |
7c81fd8b ACM |
777 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
778 | ||
6e3e939f JB |
779 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
780 | struct sk_buff *skb) | |
781 | { | |
782 | int ack; | |
783 | ||
784 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) | |
785 | return; | |
786 | if (!skb->wifi_acked_valid) | |
787 | return; | |
788 | ||
789 | ack = skb->wifi_acked; | |
790 | ||
791 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); | |
792 | } | |
793 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); | |
794 | ||
11165f14 | 795 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
796 | struct sk_buff *skb) | |
3b885787 | 797 | { |
744d5a3e | 798 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount) |
3b885787 | 799 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
744d5a3e | 800 | sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
3b885787 NH |
801 | } |
802 | ||
767dd033 | 803 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
804 | struct sk_buff *skb) |
805 | { | |
806 | sock_recv_timestamp(msg, sk, skb); | |
807 | sock_recv_drops(msg, sk, skb); | |
808 | } | |
767dd033 | 809 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 810 | |
1b784140 | 811 | static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
2da62906 | 812 | int flags) |
1da177e4 | 813 | { |
2da62906 | 814 | return sock->ops->recvmsg(sock, msg, msg_data_left(msg), flags); |
1da177e4 LT |
815 | } |
816 | ||
2da62906 | 817 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags) |
a2e27255 | 818 | { |
2da62906 | 819 | int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags); |
a2e27255 | 820 | |
2da62906 | 821 | return err ?: sock_recvmsg_nosec(sock, msg, flags); |
1da177e4 | 822 | } |
c6d409cf | 823 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 824 | |
c1249c0a ML |
825 | /** |
826 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
827 | * @sock: The socket to receive the message from | |
828 | * @msg: Received message | |
829 | * @vec: Input s/g array for message data | |
830 | * @num: Size of input s/g array | |
831 | * @size: Number of bytes to read | |
832 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
833 | * | |
834 | * On return the msg structure contains the scatter/gather array passed in the | |
835 | * vec argument. The array is modified so that it consists of the unfilled | |
836 | * portion of the original array. | |
837 | * | |
838 | * The returned value is the total number of bytes received, or an error. | |
839 | */ | |
89bddce5 SH |
840 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
841 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
842 | { |
843 | mm_segment_t oldfs = get_fs(); | |
844 | int result; | |
845 | ||
6aa24814 | 846 | iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size); |
1da177e4 | 847 | set_fs(KERNEL_DS); |
2da62906 | 848 | result = sock_recvmsg(sock, msg, flags); |
1da177e4 LT |
849 | set_fs(oldfs); |
850 | return result; | |
851 | } | |
c6d409cf | 852 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 | 853 | |
ce1d4d3e CH |
854 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
855 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 856 | { |
1da177e4 LT |
857 | struct socket *sock; |
858 | int flags; | |
859 | ||
ce1d4d3e CH |
860 | sock = file->private_data; |
861 | ||
35f9c09f ED |
862 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
863 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ | |
864 | flags |= more; | |
ce1d4d3e | 865 | |
e6949583 | 866 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 867 | } |
1da177e4 | 868 | |
9c55e01c | 869 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 870 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
871 | unsigned int flags) |
872 | { | |
873 | struct socket *sock = file->private_data; | |
874 | ||
997b37da RDC |
875 | if (unlikely(!sock->ops->splice_read)) |
876 | return -EINVAL; | |
877 | ||
9c55e01c JA |
878 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
879 | } | |
880 | ||
8ae5e030 | 881 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to) |
ce1d4d3e | 882 | { |
6d652330 AV |
883 | struct file *file = iocb->ki_filp; |
884 | struct socket *sock = file->private_data; | |
0345f931 | 885 | struct msghdr msg = {.msg_iter = *to, |
886 | .msg_iocb = iocb}; | |
8ae5e030 | 887 | ssize_t res; |
ce1d4d3e | 888 | |
8ae5e030 AV |
889 | if (file->f_flags & O_NONBLOCK) |
890 | msg.msg_flags = MSG_DONTWAIT; | |
891 | ||
892 | if (iocb->ki_pos != 0) | |
1da177e4 | 893 | return -ESPIPE; |
027445c3 | 894 | |
66ee59af | 895 | if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
1da177e4 LT |
896 | return 0; |
897 | ||
2da62906 | 898 | res = sock_recvmsg(sock, &msg, msg.msg_flags); |
8ae5e030 AV |
899 | *to = msg.msg_iter; |
900 | return res; | |
1da177e4 LT |
901 | } |
902 | ||
8ae5e030 | 903 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) |
ce1d4d3e | 904 | { |
6d652330 AV |
905 | struct file *file = iocb->ki_filp; |
906 | struct socket *sock = file->private_data; | |
0345f931 | 907 | struct msghdr msg = {.msg_iter = *from, |
908 | .msg_iocb = iocb}; | |
8ae5e030 | 909 | ssize_t res; |
1da177e4 | 910 | |
8ae5e030 | 911 | if (iocb->ki_pos != 0) |
ce1d4d3e | 912 | return -ESPIPE; |
027445c3 | 913 | |
8ae5e030 AV |
914 | if (file->f_flags & O_NONBLOCK) |
915 | msg.msg_flags = MSG_DONTWAIT; | |
916 | ||
6d652330 AV |
917 | if (sock->type == SOCK_SEQPACKET) |
918 | msg.msg_flags |= MSG_EOR; | |
919 | ||
d8725c86 | 920 | res = sock_sendmsg(sock, &msg); |
8ae5e030 AV |
921 | *from = msg.msg_iter; |
922 | return res; | |
1da177e4 LT |
923 | } |
924 | ||
1da177e4 LT |
925 | /* |
926 | * Atomic setting of ioctl hooks to avoid race | |
927 | * with module unload. | |
928 | */ | |
929 | ||
4a3e2f71 | 930 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 931 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 932 | |
881d966b | 933 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 934 | { |
4a3e2f71 | 935 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 936 | br_ioctl_hook = hook; |
4a3e2f71 | 937 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
938 | } |
939 | EXPORT_SYMBOL(brioctl_set); | |
940 | ||
4a3e2f71 | 941 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 942 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 943 | |
881d966b | 944 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 945 | { |
4a3e2f71 | 946 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 947 | vlan_ioctl_hook = hook; |
4a3e2f71 | 948 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
949 | } |
950 | EXPORT_SYMBOL(vlan_ioctl_set); | |
951 | ||
4a3e2f71 | 952 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 953 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 954 | |
89bddce5 | 955 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 956 | { |
4a3e2f71 | 957 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 958 | dlci_ioctl_hook = hook; |
4a3e2f71 | 959 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
960 | } |
961 | EXPORT_SYMBOL(dlci_ioctl_set); | |
962 | ||
6b96018b AB |
963 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
964 | unsigned int cmd, unsigned long arg) | |
965 | { | |
966 | int err; | |
967 | void __user *argp = (void __user *)arg; | |
968 | ||
969 | err = sock->ops->ioctl(sock, cmd, arg); | |
970 | ||
971 | /* | |
972 | * If this ioctl is unknown try to hand it down | |
973 | * to the NIC driver. | |
974 | */ | |
36fd633e AV |
975 | if (err != -ENOIOCTLCMD) |
976 | return err; | |
6b96018b | 977 | |
36fd633e AV |
978 | if (cmd == SIOCGIFCONF) { |
979 | struct ifconf ifc; | |
980 | if (copy_from_user(&ifc, argp, sizeof(struct ifconf))) | |
981 | return -EFAULT; | |
982 | rtnl_lock(); | |
983 | err = dev_ifconf(net, &ifc, sizeof(struct ifreq)); | |
984 | rtnl_unlock(); | |
985 | if (!err && copy_to_user(argp, &ifc, sizeof(struct ifconf))) | |
986 | err = -EFAULT; | |
44c02a2c AV |
987 | } else { |
988 | struct ifreq ifr; | |
989 | bool need_copyout; | |
990 | if (copy_from_user(&ifr, argp, sizeof(struct ifreq))) | |
991 | return -EFAULT; | |
992 | err = dev_ioctl(net, cmd, &ifr, &need_copyout); | |
993 | if (!err && need_copyout) | |
994 | if (copy_to_user(argp, &ifr, sizeof(struct ifreq))) | |
995 | return -EFAULT; | |
36fd633e | 996 | } |
6b96018b AB |
997 | return err; |
998 | } | |
999 | ||
1da177e4 LT |
1000 | /* |
1001 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
1002 | * what to do with it - that's up to the protocol still. | |
1003 | */ | |
1004 | ||
d8d211a2 | 1005 | struct ns_common *get_net_ns(struct ns_common *ns) |
c62cce2c AV |
1006 | { |
1007 | return &get_net(container_of(ns, struct net, ns))->ns; | |
1008 | } | |
d8d211a2 | 1009 | EXPORT_SYMBOL_GPL(get_net_ns); |
c62cce2c | 1010 | |
1da177e4 LT |
1011 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
1012 | { | |
1013 | struct socket *sock; | |
881d966b | 1014 | struct sock *sk; |
1da177e4 LT |
1015 | void __user *argp = (void __user *)arg; |
1016 | int pid, err; | |
881d966b | 1017 | struct net *net; |
1da177e4 | 1018 | |
b69aee04 | 1019 | sock = file->private_data; |
881d966b | 1020 | sk = sock->sk; |
3b1e0a65 | 1021 | net = sock_net(sk); |
44c02a2c AV |
1022 | if (unlikely(cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))) { |
1023 | struct ifreq ifr; | |
1024 | bool need_copyout; | |
1025 | if (copy_from_user(&ifr, argp, sizeof(struct ifreq))) | |
1026 | return -EFAULT; | |
1027 | err = dev_ioctl(net, cmd, &ifr, &need_copyout); | |
1028 | if (!err && need_copyout) | |
1029 | if (copy_to_user(argp, &ifr, sizeof(struct ifreq))) | |
1030 | return -EFAULT; | |
1da177e4 | 1031 | } else |
3d23e349 | 1032 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 1033 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
b1b0c245 | 1034 | err = wext_handle_ioctl(net, cmd, argp); |
1da177e4 | 1035 | } else |
3d23e349 | 1036 | #endif |
89bddce5 | 1037 | switch (cmd) { |
1da177e4 LT |
1038 | case FIOSETOWN: |
1039 | case SIOCSPGRP: | |
1040 | err = -EFAULT; | |
1041 | if (get_user(pid, (int __user *)argp)) | |
1042 | break; | |
393cc3f5 | 1043 | err = f_setown(sock->file, pid, 1); |
1da177e4 LT |
1044 | break; |
1045 | case FIOGETOWN: | |
1046 | case SIOCGPGRP: | |
609d7fa9 | 1047 | err = put_user(f_getown(sock->file), |
89bddce5 | 1048 | (int __user *)argp); |
1da177e4 LT |
1049 | break; |
1050 | case SIOCGIFBR: | |
1051 | case SIOCSIFBR: | |
1052 | case SIOCBRADDBR: | |
1053 | case SIOCBRDELBR: | |
1054 | err = -ENOPKG; | |
1055 | if (!br_ioctl_hook) | |
1056 | request_module("bridge"); | |
1057 | ||
4a3e2f71 | 1058 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1059 | if (br_ioctl_hook) |
881d966b | 1060 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1061 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1062 | break; |
1063 | case SIOCGIFVLAN: | |
1064 | case SIOCSIFVLAN: | |
1065 | err = -ENOPKG; | |
1066 | if (!vlan_ioctl_hook) | |
1067 | request_module("8021q"); | |
1068 | ||
4a3e2f71 | 1069 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1070 | if (vlan_ioctl_hook) |
881d966b | 1071 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1072 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1073 | break; |
1da177e4 LT |
1074 | case SIOCADDDLCI: |
1075 | case SIOCDELDLCI: | |
1076 | err = -ENOPKG; | |
1077 | if (!dlci_ioctl_hook) | |
1078 | request_module("dlci"); | |
1079 | ||
7512cbf6 PE |
1080 | mutex_lock(&dlci_ioctl_mutex); |
1081 | if (dlci_ioctl_hook) | |
1da177e4 | 1082 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1083 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 | 1084 | break; |
c62cce2c AV |
1085 | case SIOCGSKNS: |
1086 | err = -EPERM; | |
1087 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1088 | break; | |
1089 | ||
1090 | err = open_related_ns(&net->ns, get_net_ns); | |
1091 | break; | |
1da177e4 | 1092 | default: |
6b96018b | 1093 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1094 | break; |
89bddce5 | 1095 | } |
1da177e4 LT |
1096 | return err; |
1097 | } | |
1098 | ||
1099 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1100 | { | |
1101 | int err; | |
1102 | struct socket *sock = NULL; | |
89bddce5 | 1103 | |
1da177e4 LT |
1104 | err = security_socket_create(family, type, protocol, 1); |
1105 | if (err) | |
1106 | goto out; | |
1107 | ||
1108 | sock = sock_alloc(); | |
1109 | if (!sock) { | |
1110 | err = -ENOMEM; | |
1111 | goto out; | |
1112 | } | |
1113 | ||
1da177e4 | 1114 | sock->type = type; |
7420ed23 VY |
1115 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1116 | if (err) | |
1117 | goto out_release; | |
1118 | ||
1da177e4 LT |
1119 | out: |
1120 | *res = sock; | |
1121 | return err; | |
7420ed23 VY |
1122 | out_release: |
1123 | sock_release(sock); | |
1124 | sock = NULL; | |
1125 | goto out; | |
1da177e4 | 1126 | } |
c6d409cf | 1127 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1128 | |
1129 | /* No kernel lock held - perfect */ | |
ade994f4 | 1130 | static __poll_t sock_poll(struct file *file, poll_table *wait) |
1da177e4 | 1131 | { |
3cafb376 | 1132 | struct socket *sock = file->private_data; |
a11e1d43 | 1133 | __poll_t events = poll_requested_events(wait); |
2d48d67f | 1134 | |
e88958e6 CH |
1135 | if (!sock->ops->poll) |
1136 | return 0; | |
f641f13b CH |
1137 | |
1138 | /* poll once if requested by the syscall */ | |
1139 | if (sk_can_busy_loop(sock->sk) && (events & POLL_BUSY_LOOP)) | |
1140 | sk_busy_loop(sock->sk, 1); | |
a11e1d43 | 1141 | return sock->ops->poll(file, sock, wait) | sock_poll_busy_flag(sock); |
1da177e4 LT |
1142 | } |
1143 | ||
89bddce5 | 1144 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1145 | { |
b69aee04 | 1146 | struct socket *sock = file->private_data; |
1da177e4 LT |
1147 | |
1148 | return sock->ops->mmap(file, sock, vma); | |
1149 | } | |
1150 | ||
20380731 | 1151 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 | 1152 | { |
6d8c50dc | 1153 | __sock_release(SOCKET_I(inode), inode); |
1da177e4 LT |
1154 | return 0; |
1155 | } | |
1156 | ||
1157 | /* | |
1158 | * Update the socket async list | |
1159 | * | |
1160 | * Fasync_list locking strategy. | |
1161 | * | |
1162 | * 1. fasync_list is modified only under process context socket lock | |
1163 | * i.e. under semaphore. | |
1164 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1165 | * or under socket lock |
1da177e4 LT |
1166 | */ |
1167 | ||
1168 | static int sock_fasync(int fd, struct file *filp, int on) | |
1169 | { | |
989a2979 ED |
1170 | struct socket *sock = filp->private_data; |
1171 | struct sock *sk = sock->sk; | |
eaefd110 | 1172 | struct socket_wq *wq; |
1da177e4 | 1173 | |
989a2979 | 1174 | if (sk == NULL) |
1da177e4 | 1175 | return -EINVAL; |
1da177e4 LT |
1176 | |
1177 | lock_sock(sk); | |
1e1d04e6 | 1178 | wq = rcu_dereference_protected(sock->wq, lockdep_sock_is_held(sk)); |
eaefd110 | 1179 | fasync_helper(fd, filp, on, &wq->fasync_list); |
1da177e4 | 1180 | |
eaefd110 | 1181 | if (!wq->fasync_list) |
989a2979 ED |
1182 | sock_reset_flag(sk, SOCK_FASYNC); |
1183 | else | |
bcdce719 | 1184 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1185 | |
989a2979 | 1186 | release_sock(sk); |
1da177e4 LT |
1187 | return 0; |
1188 | } | |
1189 | ||
ceb5d58b | 1190 | /* This function may be called only under rcu_lock */ |
1da177e4 | 1191 | |
ceb5d58b | 1192 | int sock_wake_async(struct socket_wq *wq, int how, int band) |
1da177e4 | 1193 | { |
ceb5d58b | 1194 | if (!wq || !wq->fasync_list) |
1da177e4 | 1195 | return -1; |
ceb5d58b | 1196 | |
89bddce5 | 1197 | switch (how) { |
8d8ad9d7 | 1198 | case SOCK_WAKE_WAITD: |
ceb5d58b | 1199 | if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags)) |
1da177e4 LT |
1200 | break; |
1201 | goto call_kill; | |
8d8ad9d7 | 1202 | case SOCK_WAKE_SPACE: |
ceb5d58b | 1203 | if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags)) |
1da177e4 LT |
1204 | break; |
1205 | /* fall through */ | |
8d8ad9d7 | 1206 | case SOCK_WAKE_IO: |
89bddce5 | 1207 | call_kill: |
43815482 | 1208 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1209 | break; |
8d8ad9d7 | 1210 | case SOCK_WAKE_URG: |
43815482 | 1211 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1212 | } |
ceb5d58b | 1213 | |
1da177e4 LT |
1214 | return 0; |
1215 | } | |
c6d409cf | 1216 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1217 | |
721db93a | 1218 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1219 | struct socket **res, int kern) |
1da177e4 LT |
1220 | { |
1221 | int err; | |
1222 | struct socket *sock; | |
55737fda | 1223 | const struct net_proto_family *pf; |
1da177e4 LT |
1224 | |
1225 | /* | |
89bddce5 | 1226 | * Check protocol is in range |
1da177e4 LT |
1227 | */ |
1228 | if (family < 0 || family >= NPROTO) | |
1229 | return -EAFNOSUPPORT; | |
1230 | if (type < 0 || type >= SOCK_MAX) | |
1231 | return -EINVAL; | |
1232 | ||
1233 | /* Compatibility. | |
1234 | ||
1235 | This uglymoron is moved from INET layer to here to avoid | |
1236 | deadlock in module load. | |
1237 | */ | |
1238 | if (family == PF_INET && type == SOCK_PACKET) { | |
f3c98690 | 1239 | pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1240 | current->comm); | |
1da177e4 LT |
1241 | family = PF_PACKET; |
1242 | } | |
1243 | ||
1244 | err = security_socket_create(family, type, protocol, kern); | |
1245 | if (err) | |
1246 | return err; | |
89bddce5 | 1247 | |
55737fda SH |
1248 | /* |
1249 | * Allocate the socket and allow the family to set things up. if | |
1250 | * the protocol is 0, the family is instructed to select an appropriate | |
1251 | * default. | |
1252 | */ | |
1253 | sock = sock_alloc(); | |
1254 | if (!sock) { | |
e87cc472 | 1255 | net_warn_ratelimited("socket: no more sockets\n"); |
55737fda SH |
1256 | return -ENFILE; /* Not exactly a match, but its the |
1257 | closest posix thing */ | |
1258 | } | |
1259 | ||
1260 | sock->type = type; | |
1261 | ||
95a5afca | 1262 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1263 | /* Attempt to load a protocol module if the find failed. |
1264 | * | |
1265 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1266 | * requested real, full-featured networking support upon configuration. |
1267 | * Otherwise module support will break! | |
1268 | */ | |
190683a9 | 1269 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1270 | request_module("net-pf-%d", family); |
1da177e4 LT |
1271 | #endif |
1272 | ||
55737fda SH |
1273 | rcu_read_lock(); |
1274 | pf = rcu_dereference(net_families[family]); | |
1275 | err = -EAFNOSUPPORT; | |
1276 | if (!pf) | |
1277 | goto out_release; | |
1da177e4 LT |
1278 | |
1279 | /* | |
1280 | * We will call the ->create function, that possibly is in a loadable | |
1281 | * module, so we have to bump that loadable module refcnt first. | |
1282 | */ | |
55737fda | 1283 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1284 | goto out_release; |
1285 | ||
55737fda SH |
1286 | /* Now protected by module ref count */ |
1287 | rcu_read_unlock(); | |
1288 | ||
3f378b68 | 1289 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1290 | if (err < 0) |
1da177e4 | 1291 | goto out_module_put; |
a79af59e | 1292 | |
1da177e4 LT |
1293 | /* |
1294 | * Now to bump the refcnt of the [loadable] module that owns this | |
1295 | * socket at sock_release time we decrement its refcnt. | |
1296 | */ | |
55737fda SH |
1297 | if (!try_module_get(sock->ops->owner)) |
1298 | goto out_module_busy; | |
1299 | ||
1da177e4 LT |
1300 | /* |
1301 | * Now that we're done with the ->create function, the [loadable] | |
1302 | * module can have its refcnt decremented | |
1303 | */ | |
55737fda | 1304 | module_put(pf->owner); |
7420ed23 VY |
1305 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1306 | if (err) | |
3b185525 | 1307 | goto out_sock_release; |
55737fda | 1308 | *res = sock; |
1da177e4 | 1309 | |
55737fda SH |
1310 | return 0; |
1311 | ||
1312 | out_module_busy: | |
1313 | err = -EAFNOSUPPORT; | |
1da177e4 | 1314 | out_module_put: |
55737fda SH |
1315 | sock->ops = NULL; |
1316 | module_put(pf->owner); | |
1317 | out_sock_release: | |
1da177e4 | 1318 | sock_release(sock); |
55737fda SH |
1319 | return err; |
1320 | ||
1321 | out_release: | |
1322 | rcu_read_unlock(); | |
1323 | goto out_sock_release; | |
1da177e4 | 1324 | } |
721db93a | 1325 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1326 | |
1327 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1328 | { | |
1b8d7ae4 | 1329 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1330 | } |
c6d409cf | 1331 | EXPORT_SYMBOL(sock_create); |
1da177e4 | 1332 | |
eeb1bd5c | 1333 | int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res) |
1da177e4 | 1334 | { |
eeb1bd5c | 1335 | return __sock_create(net, family, type, protocol, res, 1); |
1da177e4 | 1336 | } |
c6d409cf | 1337 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1338 | |
9d6a15c3 | 1339 | int __sys_socket(int family, int type, int protocol) |
1da177e4 LT |
1340 | { |
1341 | int retval; | |
1342 | struct socket *sock; | |
a677a039 UD |
1343 | int flags; |
1344 | ||
e38b36f3 UD |
1345 | /* Check the SOCK_* constants for consistency. */ |
1346 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1347 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1348 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1349 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1350 | ||
a677a039 | 1351 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1352 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1353 | return -EINVAL; |
1354 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1355 | |
aaca0bdc UD |
1356 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1357 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1358 | ||
1da177e4 LT |
1359 | retval = sock_create(family, type, protocol, &sock); |
1360 | if (retval < 0) | |
8e1611e2 | 1361 | return retval; |
1da177e4 | 1362 | |
8e1611e2 | 1363 | return sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1364 | } |
1365 | ||
9d6a15c3 DB |
1366 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1367 | { | |
1368 | return __sys_socket(family, type, protocol); | |
1369 | } | |
1370 | ||
1da177e4 LT |
1371 | /* |
1372 | * Create a pair of connected sockets. | |
1373 | */ | |
1374 | ||
6debc8d8 | 1375 | int __sys_socketpair(int family, int type, int protocol, int __user *usockvec) |
1da177e4 LT |
1376 | { |
1377 | struct socket *sock1, *sock2; | |
1378 | int fd1, fd2, err; | |
db349509 | 1379 | struct file *newfile1, *newfile2; |
a677a039 UD |
1380 | int flags; |
1381 | ||
1382 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1383 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1384 | return -EINVAL; |
1385 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1386 | |
aaca0bdc UD |
1387 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1388 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1389 | ||
016a266b AV |
1390 | /* |
1391 | * reserve descriptors and make sure we won't fail | |
1392 | * to return them to userland. | |
1393 | */ | |
1394 | fd1 = get_unused_fd_flags(flags); | |
1395 | if (unlikely(fd1 < 0)) | |
1396 | return fd1; | |
1397 | ||
1398 | fd2 = get_unused_fd_flags(flags); | |
1399 | if (unlikely(fd2 < 0)) { | |
1400 | put_unused_fd(fd1); | |
1401 | return fd2; | |
1402 | } | |
1403 | ||
1404 | err = put_user(fd1, &usockvec[0]); | |
1405 | if (err) | |
1406 | goto out; | |
1407 | ||
1408 | err = put_user(fd2, &usockvec[1]); | |
1409 | if (err) | |
1410 | goto out; | |
1411 | ||
1da177e4 LT |
1412 | /* |
1413 | * Obtain the first socket and check if the underlying protocol | |
1414 | * supports the socketpair call. | |
1415 | */ | |
1416 | ||
1417 | err = sock_create(family, type, protocol, &sock1); | |
016a266b | 1418 | if (unlikely(err < 0)) |
1da177e4 LT |
1419 | goto out; |
1420 | ||
1421 | err = sock_create(family, type, protocol, &sock2); | |
016a266b AV |
1422 | if (unlikely(err < 0)) { |
1423 | sock_release(sock1); | |
1424 | goto out; | |
bf3c23d1 | 1425 | } |
d73aa286 | 1426 | |
d47cd945 DH |
1427 | err = security_socket_socketpair(sock1, sock2); |
1428 | if (unlikely(err)) { | |
1429 | sock_release(sock2); | |
1430 | sock_release(sock1); | |
1431 | goto out; | |
1432 | } | |
1433 | ||
016a266b AV |
1434 | err = sock1->ops->socketpair(sock1, sock2); |
1435 | if (unlikely(err < 0)) { | |
1436 | sock_release(sock2); | |
1437 | sock_release(sock1); | |
1438 | goto out; | |
28407630 AV |
1439 | } |
1440 | ||
aab174f0 | 1441 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
b5ffe634 | 1442 | if (IS_ERR(newfile1)) { |
28407630 | 1443 | err = PTR_ERR(newfile1); |
016a266b AV |
1444 | sock_release(sock2); |
1445 | goto out; | |
28407630 AV |
1446 | } |
1447 | ||
aab174f0 | 1448 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
28407630 AV |
1449 | if (IS_ERR(newfile2)) { |
1450 | err = PTR_ERR(newfile2); | |
016a266b AV |
1451 | fput(newfile1); |
1452 | goto out; | |
db349509 AV |
1453 | } |
1454 | ||
157cf649 | 1455 | audit_fd_pair(fd1, fd2); |
d73aa286 | 1456 | |
db349509 AV |
1457 | fd_install(fd1, newfile1); |
1458 | fd_install(fd2, newfile2); | |
d73aa286 | 1459 | return 0; |
1da177e4 | 1460 | |
016a266b | 1461 | out: |
d73aa286 | 1462 | put_unused_fd(fd2); |
d73aa286 | 1463 | put_unused_fd(fd1); |
1da177e4 LT |
1464 | return err; |
1465 | } | |
1466 | ||
6debc8d8 DB |
1467 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1468 | int __user *, usockvec) | |
1469 | { | |
1470 | return __sys_socketpair(family, type, protocol, usockvec); | |
1471 | } | |
1472 | ||
1da177e4 LT |
1473 | /* |
1474 | * Bind a name to a socket. Nothing much to do here since it's | |
1475 | * the protocol's responsibility to handle the local address. | |
1476 | * | |
1477 | * We move the socket address to kernel space before we call | |
1478 | * the protocol layer (having also checked the address is ok). | |
1479 | */ | |
1480 | ||
a87d35d8 | 1481 | int __sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen) |
1da177e4 LT |
1482 | { |
1483 | struct socket *sock; | |
230b1839 | 1484 | struct sockaddr_storage address; |
6cb153ca | 1485 | int err, fput_needed; |
1da177e4 | 1486 | |
89bddce5 | 1487 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1488 | if (sock) { |
43db362d | 1489 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
89bddce5 SH |
1490 | if (err >= 0) { |
1491 | err = security_socket_bind(sock, | |
230b1839 | 1492 | (struct sockaddr *)&address, |
89bddce5 | 1493 | addrlen); |
6cb153ca BL |
1494 | if (!err) |
1495 | err = sock->ops->bind(sock, | |
89bddce5 | 1496 | (struct sockaddr *) |
230b1839 | 1497 | &address, addrlen); |
1da177e4 | 1498 | } |
6cb153ca | 1499 | fput_light(sock->file, fput_needed); |
89bddce5 | 1500 | } |
1da177e4 LT |
1501 | return err; |
1502 | } | |
1503 | ||
a87d35d8 DB |
1504 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1505 | { | |
1506 | return __sys_bind(fd, umyaddr, addrlen); | |
1507 | } | |
1508 | ||
1da177e4 LT |
1509 | /* |
1510 | * Perform a listen. Basically, we allow the protocol to do anything | |
1511 | * necessary for a listen, and if that works, we mark the socket as | |
1512 | * ready for listening. | |
1513 | */ | |
1514 | ||
25e290ee | 1515 | int __sys_listen(int fd, int backlog) |
1da177e4 LT |
1516 | { |
1517 | struct socket *sock; | |
6cb153ca | 1518 | int err, fput_needed; |
b8e1f9b5 | 1519 | int somaxconn; |
89bddce5 SH |
1520 | |
1521 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1522 | if (sock) { | |
8efa6e93 | 1523 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
95c96174 | 1524 | if ((unsigned int)backlog > somaxconn) |
b8e1f9b5 | 1525 | backlog = somaxconn; |
1da177e4 LT |
1526 | |
1527 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1528 | if (!err) |
1529 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1530 | |
6cb153ca | 1531 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1532 | } |
1533 | return err; | |
1534 | } | |
1535 | ||
25e290ee DB |
1536 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1537 | { | |
1538 | return __sys_listen(fd, backlog); | |
1539 | } | |
1540 | ||
1da177e4 LT |
1541 | /* |
1542 | * For accept, we attempt to create a new socket, set up the link | |
1543 | * with the client, wake up the client, then return the new | |
1544 | * connected fd. We collect the address of the connector in kernel | |
1545 | * space and move it to user at the very end. This is unclean because | |
1546 | * we open the socket then return an error. | |
1547 | * | |
1548 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1549 | * status to recvmsg. We need to add that support in a way thats | |
b903036a | 1550 | * clean when we restructure accept also. |
1da177e4 LT |
1551 | */ |
1552 | ||
4541e805 DB |
1553 | int __sys_accept4(int fd, struct sockaddr __user *upeer_sockaddr, |
1554 | int __user *upeer_addrlen, int flags) | |
1da177e4 LT |
1555 | { |
1556 | struct socket *sock, *newsock; | |
39d8c1b6 | 1557 | struct file *newfile; |
6cb153ca | 1558 | int err, len, newfd, fput_needed; |
230b1839 | 1559 | struct sockaddr_storage address; |
1da177e4 | 1560 | |
77d27200 | 1561 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1562 | return -EINVAL; |
1563 | ||
1564 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1565 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1566 | ||
6cb153ca | 1567 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1568 | if (!sock) |
1569 | goto out; | |
1570 | ||
1571 | err = -ENFILE; | |
c6d409cf ED |
1572 | newsock = sock_alloc(); |
1573 | if (!newsock) | |
1da177e4 LT |
1574 | goto out_put; |
1575 | ||
1576 | newsock->type = sock->type; | |
1577 | newsock->ops = sock->ops; | |
1578 | ||
1da177e4 LT |
1579 | /* |
1580 | * We don't need try_module_get here, as the listening socket (sock) | |
1581 | * has the protocol module (sock->ops->owner) held. | |
1582 | */ | |
1583 | __module_get(newsock->ops->owner); | |
1584 | ||
28407630 | 1585 | newfd = get_unused_fd_flags(flags); |
39d8c1b6 DM |
1586 | if (unlikely(newfd < 0)) { |
1587 | err = newfd; | |
9a1875e6 DM |
1588 | sock_release(newsock); |
1589 | goto out_put; | |
39d8c1b6 | 1590 | } |
aab174f0 | 1591 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
b5ffe634 | 1592 | if (IS_ERR(newfile)) { |
28407630 AV |
1593 | err = PTR_ERR(newfile); |
1594 | put_unused_fd(newfd); | |
28407630 AV |
1595 | goto out_put; |
1596 | } | |
39d8c1b6 | 1597 | |
a79af59e FF |
1598 | err = security_socket_accept(sock, newsock); |
1599 | if (err) | |
39d8c1b6 | 1600 | goto out_fd; |
a79af59e | 1601 | |
cdfbabfb | 1602 | err = sock->ops->accept(sock, newsock, sock->file->f_flags, false); |
1da177e4 | 1603 | if (err < 0) |
39d8c1b6 | 1604 | goto out_fd; |
1da177e4 LT |
1605 | |
1606 | if (upeer_sockaddr) { | |
9b2c45d4 DV |
1607 | len = newsock->ops->getname(newsock, |
1608 | (struct sockaddr *)&address, 2); | |
1609 | if (len < 0) { | |
1da177e4 | 1610 | err = -ECONNABORTED; |
39d8c1b6 | 1611 | goto out_fd; |
1da177e4 | 1612 | } |
43db362d | 1613 | err = move_addr_to_user(&address, |
230b1839 | 1614 | len, upeer_sockaddr, upeer_addrlen); |
1da177e4 | 1615 | if (err < 0) |
39d8c1b6 | 1616 | goto out_fd; |
1da177e4 LT |
1617 | } |
1618 | ||
1619 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1620 | ||
39d8c1b6 DM |
1621 | fd_install(newfd, newfile); |
1622 | err = newfd; | |
1da177e4 | 1623 | |
1da177e4 | 1624 | out_put: |
6cb153ca | 1625 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1626 | out: |
1627 | return err; | |
39d8c1b6 | 1628 | out_fd: |
9606a216 | 1629 | fput(newfile); |
39d8c1b6 | 1630 | put_unused_fd(newfd); |
1da177e4 LT |
1631 | goto out_put; |
1632 | } | |
1633 | ||
4541e805 DB |
1634 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1635 | int __user *, upeer_addrlen, int, flags) | |
1636 | { | |
1637 | return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, flags); | |
1638 | } | |
1639 | ||
20f37034 HC |
1640 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1641 | int __user *, upeer_addrlen) | |
aaca0bdc | 1642 | { |
4541e805 | 1643 | return __sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1644 | } |
1645 | ||
1da177e4 LT |
1646 | /* |
1647 | * Attempt to connect to a socket with the server address. The address | |
1648 | * is in user space so we verify it is OK and move it to kernel space. | |
1649 | * | |
1650 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1651 | * break bindings | |
1652 | * | |
1653 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1654 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1655 | * include the -EINPROGRESS status for such sockets. | |
1656 | */ | |
1657 | ||
1387c2c2 | 1658 | int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen) |
1da177e4 LT |
1659 | { |
1660 | struct socket *sock; | |
230b1839 | 1661 | struct sockaddr_storage address; |
6cb153ca | 1662 | int err, fput_needed; |
1da177e4 | 1663 | |
6cb153ca | 1664 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1665 | if (!sock) |
1666 | goto out; | |
43db362d | 1667 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
1da177e4 LT |
1668 | if (err < 0) |
1669 | goto out_put; | |
1670 | ||
89bddce5 | 1671 | err = |
230b1839 | 1672 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1673 | if (err) |
1674 | goto out_put; | |
1675 | ||
230b1839 | 1676 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1677 | sock->file->f_flags); |
1678 | out_put: | |
6cb153ca | 1679 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1680 | out: |
1681 | return err; | |
1682 | } | |
1683 | ||
1387c2c2 DB |
1684 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1685 | int, addrlen) | |
1686 | { | |
1687 | return __sys_connect(fd, uservaddr, addrlen); | |
1688 | } | |
1689 | ||
1da177e4 LT |
1690 | /* |
1691 | * Get the local address ('name') of a socket object. Move the obtained | |
1692 | * name to user space. | |
1693 | */ | |
1694 | ||
8882a107 DB |
1695 | int __sys_getsockname(int fd, struct sockaddr __user *usockaddr, |
1696 | int __user *usockaddr_len) | |
1da177e4 LT |
1697 | { |
1698 | struct socket *sock; | |
230b1839 | 1699 | struct sockaddr_storage address; |
9b2c45d4 | 1700 | int err, fput_needed; |
89bddce5 | 1701 | |
6cb153ca | 1702 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1703 | if (!sock) |
1704 | goto out; | |
1705 | ||
1706 | err = security_socket_getsockname(sock); | |
1707 | if (err) | |
1708 | goto out_put; | |
1709 | ||
9b2c45d4 DV |
1710 | err = sock->ops->getname(sock, (struct sockaddr *)&address, 0); |
1711 | if (err < 0) | |
1da177e4 | 1712 | goto out_put; |
9b2c45d4 DV |
1713 | /* "err" is actually length in this case */ |
1714 | err = move_addr_to_user(&address, err, usockaddr, usockaddr_len); | |
1da177e4 LT |
1715 | |
1716 | out_put: | |
6cb153ca | 1717 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1718 | out: |
1719 | return err; | |
1720 | } | |
1721 | ||
8882a107 DB |
1722 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1723 | int __user *, usockaddr_len) | |
1724 | { | |
1725 | return __sys_getsockname(fd, usockaddr, usockaddr_len); | |
1726 | } | |
1727 | ||
1da177e4 LT |
1728 | /* |
1729 | * Get the remote address ('name') of a socket object. Move the obtained | |
1730 | * name to user space. | |
1731 | */ | |
1732 | ||
b21c8f83 DB |
1733 | int __sys_getpeername(int fd, struct sockaddr __user *usockaddr, |
1734 | int __user *usockaddr_len) | |
1da177e4 LT |
1735 | { |
1736 | struct socket *sock; | |
230b1839 | 1737 | struct sockaddr_storage address; |
9b2c45d4 | 1738 | int err, fput_needed; |
1da177e4 | 1739 | |
89bddce5 SH |
1740 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1741 | if (sock != NULL) { | |
1da177e4 LT |
1742 | err = security_socket_getpeername(sock); |
1743 | if (err) { | |
6cb153ca | 1744 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1745 | return err; |
1746 | } | |
1747 | ||
9b2c45d4 DV |
1748 | err = sock->ops->getname(sock, (struct sockaddr *)&address, 1); |
1749 | if (err >= 0) | |
1750 | /* "err" is actually length in this case */ | |
1751 | err = move_addr_to_user(&address, err, usockaddr, | |
89bddce5 | 1752 | usockaddr_len); |
6cb153ca | 1753 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1754 | } |
1755 | return err; | |
1756 | } | |
1757 | ||
b21c8f83 DB |
1758 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1759 | int __user *, usockaddr_len) | |
1760 | { | |
1761 | return __sys_getpeername(fd, usockaddr, usockaddr_len); | |
1762 | } | |
1763 | ||
1da177e4 LT |
1764 | /* |
1765 | * Send a datagram to a given address. We move the address into kernel | |
1766 | * space and check the user space data area is readable before invoking | |
1767 | * the protocol. | |
1768 | */ | |
211b634b DB |
1769 | int __sys_sendto(int fd, void __user *buff, size_t len, unsigned int flags, |
1770 | struct sockaddr __user *addr, int addr_len) | |
1da177e4 LT |
1771 | { |
1772 | struct socket *sock; | |
230b1839 | 1773 | struct sockaddr_storage address; |
1da177e4 LT |
1774 | int err; |
1775 | struct msghdr msg; | |
1776 | struct iovec iov; | |
6cb153ca | 1777 | int fput_needed; |
6cb153ca | 1778 | |
602bd0e9 AV |
1779 | err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter); |
1780 | if (unlikely(err)) | |
1781 | return err; | |
de0fa95c PE |
1782 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1783 | if (!sock) | |
4387ff75 | 1784 | goto out; |
6cb153ca | 1785 | |
89bddce5 | 1786 | msg.msg_name = NULL; |
89bddce5 SH |
1787 | msg.msg_control = NULL; |
1788 | msg.msg_controllen = 0; | |
1789 | msg.msg_namelen = 0; | |
6cb153ca | 1790 | if (addr) { |
43db362d | 1791 | err = move_addr_to_kernel(addr, addr_len, &address); |
1da177e4 LT |
1792 | if (err < 0) |
1793 | goto out_put; | |
230b1839 | 1794 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1795 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1796 | } |
1797 | if (sock->file->f_flags & O_NONBLOCK) | |
1798 | flags |= MSG_DONTWAIT; | |
1799 | msg.msg_flags = flags; | |
d8725c86 | 1800 | err = sock_sendmsg(sock, &msg); |
1da177e4 | 1801 | |
89bddce5 | 1802 | out_put: |
de0fa95c | 1803 | fput_light(sock->file, fput_needed); |
4387ff75 | 1804 | out: |
1da177e4 LT |
1805 | return err; |
1806 | } | |
1807 | ||
211b634b DB |
1808 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
1809 | unsigned int, flags, struct sockaddr __user *, addr, | |
1810 | int, addr_len) | |
1811 | { | |
1812 | return __sys_sendto(fd, buff, len, flags, addr, addr_len); | |
1813 | } | |
1814 | ||
1da177e4 | 1815 | /* |
89bddce5 | 1816 | * Send a datagram down a socket. |
1da177e4 LT |
1817 | */ |
1818 | ||
3e0fa65f | 1819 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
95c96174 | 1820 | unsigned int, flags) |
1da177e4 | 1821 | { |
211b634b | 1822 | return __sys_sendto(fd, buff, len, flags, NULL, 0); |
1da177e4 LT |
1823 | } |
1824 | ||
1825 | /* | |
89bddce5 | 1826 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1827 | * sender. We verify the buffers are writable and if needed move the |
1828 | * sender address from kernel to user space. | |
1829 | */ | |
7a09e1eb DB |
1830 | int __sys_recvfrom(int fd, void __user *ubuf, size_t size, unsigned int flags, |
1831 | struct sockaddr __user *addr, int __user *addr_len) | |
1da177e4 LT |
1832 | { |
1833 | struct socket *sock; | |
1834 | struct iovec iov; | |
1835 | struct msghdr msg; | |
230b1839 | 1836 | struct sockaddr_storage address; |
89bddce5 | 1837 | int err, err2; |
6cb153ca BL |
1838 | int fput_needed; |
1839 | ||
602bd0e9 AV |
1840 | err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter); |
1841 | if (unlikely(err)) | |
1842 | return err; | |
de0fa95c | 1843 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1844 | if (!sock) |
de0fa95c | 1845 | goto out; |
1da177e4 | 1846 | |
89bddce5 SH |
1847 | msg.msg_control = NULL; |
1848 | msg.msg_controllen = 0; | |
f3d33426 HFS |
1849 | /* Save some cycles and don't copy the address if not needed */ |
1850 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; | |
1851 | /* We assume all kernel code knows the size of sockaddr_storage */ | |
1852 | msg.msg_namelen = 0; | |
130ed5d1 | 1853 | msg.msg_iocb = NULL; |
9f138fa6 | 1854 | msg.msg_flags = 0; |
1da177e4 LT |
1855 | if (sock->file->f_flags & O_NONBLOCK) |
1856 | flags |= MSG_DONTWAIT; | |
2da62906 | 1857 | err = sock_recvmsg(sock, &msg, flags); |
1da177e4 | 1858 | |
89bddce5 | 1859 | if (err >= 0 && addr != NULL) { |
43db362d | 1860 | err2 = move_addr_to_user(&address, |
230b1839 | 1861 | msg.msg_namelen, addr, addr_len); |
89bddce5 SH |
1862 | if (err2 < 0) |
1863 | err = err2; | |
1da177e4 | 1864 | } |
de0fa95c PE |
1865 | |
1866 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1867 | out: |
1da177e4 LT |
1868 | return err; |
1869 | } | |
1870 | ||
7a09e1eb DB |
1871 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
1872 | unsigned int, flags, struct sockaddr __user *, addr, | |
1873 | int __user *, addr_len) | |
1874 | { | |
1875 | return __sys_recvfrom(fd, ubuf, size, flags, addr, addr_len); | |
1876 | } | |
1877 | ||
1da177e4 | 1878 | /* |
89bddce5 | 1879 | * Receive a datagram from a socket. |
1da177e4 LT |
1880 | */ |
1881 | ||
b7c0ddf5 JG |
1882 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
1883 | unsigned int, flags) | |
1da177e4 | 1884 | { |
7a09e1eb | 1885 | return __sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
1da177e4 LT |
1886 | } |
1887 | ||
1888 | /* | |
1889 | * Set a socket option. Because we don't know the option lengths we have | |
1890 | * to pass the user mode parameter for the protocols to sort out. | |
1891 | */ | |
1892 | ||
cc36dca0 DB |
1893 | static int __sys_setsockopt(int fd, int level, int optname, |
1894 | char __user *optval, int optlen) | |
1da177e4 | 1895 | { |
6cb153ca | 1896 | int err, fput_needed; |
1da177e4 LT |
1897 | struct socket *sock; |
1898 | ||
1899 | if (optlen < 0) | |
1900 | return -EINVAL; | |
89bddce5 SH |
1901 | |
1902 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1903 | if (sock != NULL) { | |
1904 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1905 | if (err) |
1906 | goto out_put; | |
1da177e4 LT |
1907 | |
1908 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1909 | err = |
1910 | sock_setsockopt(sock, level, optname, optval, | |
1911 | optlen); | |
1da177e4 | 1912 | else |
89bddce5 SH |
1913 | err = |
1914 | sock->ops->setsockopt(sock, level, optname, optval, | |
1915 | optlen); | |
6cb153ca BL |
1916 | out_put: |
1917 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1918 | } |
1919 | return err; | |
1920 | } | |
1921 | ||
cc36dca0 DB |
1922 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1923 | char __user *, optval, int, optlen) | |
1924 | { | |
1925 | return __sys_setsockopt(fd, level, optname, optval, optlen); | |
1926 | } | |
1927 | ||
1da177e4 LT |
1928 | /* |
1929 | * Get a socket option. Because we don't know the option lengths we have | |
1930 | * to pass a user mode parameter for the protocols to sort out. | |
1931 | */ | |
1932 | ||
13a2d70e DB |
1933 | static int __sys_getsockopt(int fd, int level, int optname, |
1934 | char __user *optval, int __user *optlen) | |
1da177e4 | 1935 | { |
6cb153ca | 1936 | int err, fput_needed; |
1da177e4 LT |
1937 | struct socket *sock; |
1938 | ||
89bddce5 SH |
1939 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1940 | if (sock != NULL) { | |
6cb153ca BL |
1941 | err = security_socket_getsockopt(sock, level, optname); |
1942 | if (err) | |
1943 | goto out_put; | |
1da177e4 LT |
1944 | |
1945 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1946 | err = |
1947 | sock_getsockopt(sock, level, optname, optval, | |
1948 | optlen); | |
1da177e4 | 1949 | else |
89bddce5 SH |
1950 | err = |
1951 | sock->ops->getsockopt(sock, level, optname, optval, | |
1952 | optlen); | |
6cb153ca BL |
1953 | out_put: |
1954 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1955 | } |
1956 | return err; | |
1957 | } | |
1958 | ||
13a2d70e DB |
1959 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1960 | char __user *, optval, int __user *, optlen) | |
1961 | { | |
1962 | return __sys_getsockopt(fd, level, optname, optval, optlen); | |
1963 | } | |
1964 | ||
1da177e4 LT |
1965 | /* |
1966 | * Shutdown a socket. | |
1967 | */ | |
1968 | ||
005a1aea | 1969 | int __sys_shutdown(int fd, int how) |
1da177e4 | 1970 | { |
6cb153ca | 1971 | int err, fput_needed; |
1da177e4 LT |
1972 | struct socket *sock; |
1973 | ||
89bddce5 SH |
1974 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1975 | if (sock != NULL) { | |
1da177e4 | 1976 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1977 | if (!err) |
1978 | err = sock->ops->shutdown(sock, how); | |
1979 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1980 | } |
1981 | return err; | |
1982 | } | |
1983 | ||
005a1aea DB |
1984 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1985 | { | |
1986 | return __sys_shutdown(fd, how); | |
1987 | } | |
1988 | ||
89bddce5 | 1989 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1990 | * fields which are the same type (int / unsigned) on our platforms. |
1991 | */ | |
1992 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1993 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1994 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1995 | ||
c71d8ebe TH |
1996 | struct used_address { |
1997 | struct sockaddr_storage name; | |
1998 | unsigned int name_len; | |
1999 | }; | |
2000 | ||
da184284 AV |
2001 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
2002 | struct user_msghdr __user *umsg, | |
2003 | struct sockaddr __user **save_addr, | |
2004 | struct iovec **iov) | |
1661bf36 | 2005 | { |
ffb07550 | 2006 | struct user_msghdr msg; |
08adb7da AV |
2007 | ssize_t err; |
2008 | ||
ffb07550 | 2009 | if (copy_from_user(&msg, umsg, sizeof(*umsg))) |
1661bf36 | 2010 | return -EFAULT; |
dbb490b9 | 2011 | |
864d9664 | 2012 | kmsg->msg_control = (void __force *)msg.msg_control; |
ffb07550 AV |
2013 | kmsg->msg_controllen = msg.msg_controllen; |
2014 | kmsg->msg_flags = msg.msg_flags; | |
2015 | ||
2016 | kmsg->msg_namelen = msg.msg_namelen; | |
2017 | if (!msg.msg_name) | |
6a2a2b3a AS |
2018 | kmsg->msg_namelen = 0; |
2019 | ||
dbb490b9 ML |
2020 | if (kmsg->msg_namelen < 0) |
2021 | return -EINVAL; | |
2022 | ||
1661bf36 | 2023 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
db31c55a | 2024 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
08adb7da AV |
2025 | |
2026 | if (save_addr) | |
ffb07550 | 2027 | *save_addr = msg.msg_name; |
08adb7da | 2028 | |
ffb07550 | 2029 | if (msg.msg_name && kmsg->msg_namelen) { |
08adb7da | 2030 | if (!save_addr) { |
864d9664 PA |
2031 | err = move_addr_to_kernel(msg.msg_name, |
2032 | kmsg->msg_namelen, | |
08adb7da AV |
2033 | kmsg->msg_name); |
2034 | if (err < 0) | |
2035 | return err; | |
2036 | } | |
2037 | } else { | |
2038 | kmsg->msg_name = NULL; | |
2039 | kmsg->msg_namelen = 0; | |
2040 | } | |
2041 | ||
ffb07550 | 2042 | if (msg.msg_iovlen > UIO_MAXIOV) |
08adb7da AV |
2043 | return -EMSGSIZE; |
2044 | ||
0345f931 | 2045 | kmsg->msg_iocb = NULL; |
2046 | ||
ffb07550 AV |
2047 | return import_iovec(save_addr ? READ : WRITE, |
2048 | msg.msg_iov, msg.msg_iovlen, | |
da184284 | 2049 | UIO_FASTIOV, iov, &kmsg->msg_iter); |
1661bf36 DC |
2050 | } |
2051 | ||
666547ff | 2052 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 2053 | struct msghdr *msg_sys, unsigned int flags, |
28a94d8f TH |
2054 | struct used_address *used_address, |
2055 | unsigned int allowed_msghdr_flags) | |
1da177e4 | 2056 | { |
89bddce5 SH |
2057 | struct compat_msghdr __user *msg_compat = |
2058 | (struct compat_msghdr __user *)msg; | |
230b1839 | 2059 | struct sockaddr_storage address; |
1da177e4 | 2060 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 2061 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
846cc123 | 2062 | __aligned(sizeof(__kernel_size_t)); |
89bddce5 | 2063 | /* 20 is size of ipv6_pktinfo */ |
1da177e4 | 2064 | unsigned char *ctl_buf = ctl; |
d8725c86 | 2065 | int ctl_len; |
08adb7da | 2066 | ssize_t err; |
89bddce5 | 2067 | |
08adb7da | 2068 | msg_sys->msg_name = &address; |
1da177e4 | 2069 | |
08449320 | 2070 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 2071 | err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov); |
08449320 | 2072 | else |
08adb7da | 2073 | err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov); |
89bddce5 | 2074 | if (err < 0) |
da184284 | 2075 | return err; |
1da177e4 LT |
2076 | |
2077 | err = -ENOBUFS; | |
2078 | ||
228e548e | 2079 | if (msg_sys->msg_controllen > INT_MAX) |
1da177e4 | 2080 | goto out_freeiov; |
28a94d8f | 2081 | flags |= (msg_sys->msg_flags & allowed_msghdr_flags); |
228e548e | 2082 | ctl_len = msg_sys->msg_controllen; |
1da177e4 | 2083 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 | 2084 | err = |
228e548e | 2085 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
89bddce5 | 2086 | sizeof(ctl)); |
1da177e4 LT |
2087 | if (err) |
2088 | goto out_freeiov; | |
228e548e AB |
2089 | ctl_buf = msg_sys->msg_control; |
2090 | ctl_len = msg_sys->msg_controllen; | |
1da177e4 | 2091 | } else if (ctl_len) { |
ac4340fc DM |
2092 | BUILD_BUG_ON(sizeof(struct cmsghdr) != |
2093 | CMSG_ALIGN(sizeof(struct cmsghdr))); | |
89bddce5 | 2094 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 2095 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 2096 | if (ctl_buf == NULL) |
1da177e4 LT |
2097 | goto out_freeiov; |
2098 | } | |
2099 | err = -EFAULT; | |
2100 | /* | |
228e548e | 2101 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
1da177e4 LT |
2102 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
2103 | * checking falls down on this. | |
2104 | */ | |
fb8621bb | 2105 | if (copy_from_user(ctl_buf, |
228e548e | 2106 | (void __user __force *)msg_sys->msg_control, |
89bddce5 | 2107 | ctl_len)) |
1da177e4 | 2108 | goto out_freectl; |
228e548e | 2109 | msg_sys->msg_control = ctl_buf; |
1da177e4 | 2110 | } |
228e548e | 2111 | msg_sys->msg_flags = flags; |
1da177e4 LT |
2112 | |
2113 | if (sock->file->f_flags & O_NONBLOCK) | |
228e548e | 2114 | msg_sys->msg_flags |= MSG_DONTWAIT; |
c71d8ebe TH |
2115 | /* |
2116 | * If this is sendmmsg() and current destination address is same as | |
2117 | * previously succeeded address, omit asking LSM's decision. | |
2118 | * used_address->name_len is initialized to UINT_MAX so that the first | |
2119 | * destination address never matches. | |
2120 | */ | |
bc909d9d MD |
2121 | if (used_address && msg_sys->msg_name && |
2122 | used_address->name_len == msg_sys->msg_namelen && | |
2123 | !memcmp(&used_address->name, msg_sys->msg_name, | |
c71d8ebe | 2124 | used_address->name_len)) { |
d8725c86 | 2125 | err = sock_sendmsg_nosec(sock, msg_sys); |
c71d8ebe TH |
2126 | goto out_freectl; |
2127 | } | |
d8725c86 | 2128 | err = sock_sendmsg(sock, msg_sys); |
c71d8ebe TH |
2129 | /* |
2130 | * If this is sendmmsg() and sending to current destination address was | |
2131 | * successful, remember it. | |
2132 | */ | |
2133 | if (used_address && err >= 0) { | |
2134 | used_address->name_len = msg_sys->msg_namelen; | |
bc909d9d MD |
2135 | if (msg_sys->msg_name) |
2136 | memcpy(&used_address->name, msg_sys->msg_name, | |
2137 | used_address->name_len); | |
c71d8ebe | 2138 | } |
1da177e4 LT |
2139 | |
2140 | out_freectl: | |
89bddce5 | 2141 | if (ctl_buf != ctl) |
1da177e4 LT |
2142 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
2143 | out_freeiov: | |
da184284 | 2144 | kfree(iov); |
228e548e AB |
2145 | return err; |
2146 | } | |
2147 | ||
2148 | /* | |
2149 | * BSD sendmsg interface | |
2150 | */ | |
2151 | ||
e1834a32 DB |
2152 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, |
2153 | bool forbid_cmsg_compat) | |
228e548e AB |
2154 | { |
2155 | int fput_needed, err; | |
2156 | struct msghdr msg_sys; | |
1be374a0 AL |
2157 | struct socket *sock; |
2158 | ||
e1834a32 DB |
2159 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
2160 | return -EINVAL; | |
2161 | ||
1be374a0 | 2162 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
228e548e AB |
2163 | if (!sock) |
2164 | goto out; | |
2165 | ||
28a94d8f | 2166 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0); |
228e548e | 2167 | |
6cb153ca | 2168 | fput_light(sock->file, fput_needed); |
89bddce5 | 2169 | out: |
1da177e4 LT |
2170 | return err; |
2171 | } | |
2172 | ||
666547ff | 2173 | SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
a7526eb5 | 2174 | { |
e1834a32 | 2175 | return __sys_sendmsg(fd, msg, flags, true); |
a7526eb5 AL |
2176 | } |
2177 | ||
228e548e AB |
2178 | /* |
2179 | * Linux sendmmsg interface | |
2180 | */ | |
2181 | ||
2182 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
e1834a32 | 2183 | unsigned int flags, bool forbid_cmsg_compat) |
228e548e AB |
2184 | { |
2185 | int fput_needed, err, datagrams; | |
2186 | struct socket *sock; | |
2187 | struct mmsghdr __user *entry; | |
2188 | struct compat_mmsghdr __user *compat_entry; | |
2189 | struct msghdr msg_sys; | |
c71d8ebe | 2190 | struct used_address used_address; |
f092276d | 2191 | unsigned int oflags = flags; |
228e548e | 2192 | |
e1834a32 DB |
2193 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
2194 | return -EINVAL; | |
2195 | ||
98382f41 AB |
2196 | if (vlen > UIO_MAXIOV) |
2197 | vlen = UIO_MAXIOV; | |
228e548e AB |
2198 | |
2199 | datagrams = 0; | |
2200 | ||
2201 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2202 | if (!sock) | |
2203 | return err; | |
2204 | ||
c71d8ebe | 2205 | used_address.name_len = UINT_MAX; |
228e548e AB |
2206 | entry = mmsg; |
2207 | compat_entry = (struct compat_mmsghdr __user *)mmsg; | |
728ffb86 | 2208 | err = 0; |
f092276d | 2209 | flags |= MSG_BATCH; |
228e548e AB |
2210 | |
2211 | while (datagrams < vlen) { | |
f092276d TH |
2212 | if (datagrams == vlen - 1) |
2213 | flags = oflags; | |
2214 | ||
228e548e | 2215 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2216 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
28a94d8f | 2217 | &msg_sys, flags, &used_address, MSG_EOR); |
228e548e AB |
2218 | if (err < 0) |
2219 | break; | |
2220 | err = __put_user(err, &compat_entry->msg_len); | |
2221 | ++compat_entry; | |
2222 | } else { | |
a7526eb5 | 2223 | err = ___sys_sendmsg(sock, |
666547ff | 2224 | (struct user_msghdr __user *)entry, |
28a94d8f | 2225 | &msg_sys, flags, &used_address, MSG_EOR); |
228e548e AB |
2226 | if (err < 0) |
2227 | break; | |
2228 | err = put_user(err, &entry->msg_len); | |
2229 | ++entry; | |
2230 | } | |
2231 | ||
2232 | if (err) | |
2233 | break; | |
2234 | ++datagrams; | |
3023898b SHY |
2235 | if (msg_data_left(&msg_sys)) |
2236 | break; | |
a78cb84c | 2237 | cond_resched(); |
228e548e AB |
2238 | } |
2239 | ||
228e548e AB |
2240 | fput_light(sock->file, fput_needed); |
2241 | ||
728ffb86 AB |
2242 | /* We only return an error if no datagrams were able to be sent */ |
2243 | if (datagrams != 0) | |
228e548e AB |
2244 | return datagrams; |
2245 | ||
228e548e AB |
2246 | return err; |
2247 | } | |
2248 | ||
2249 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2250 | unsigned int, vlen, unsigned int, flags) | |
2251 | { | |
e1834a32 | 2252 | return __sys_sendmmsg(fd, mmsg, vlen, flags, true); |
228e548e AB |
2253 | } |
2254 | ||
666547ff | 2255 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
95c96174 | 2256 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
1da177e4 | 2257 | { |
89bddce5 SH |
2258 | struct compat_msghdr __user *msg_compat = |
2259 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 2260 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 2261 | struct iovec *iov = iovstack; |
1da177e4 | 2262 | unsigned long cmsg_ptr; |
2da62906 | 2263 | int len; |
08adb7da | 2264 | ssize_t err; |
1da177e4 LT |
2265 | |
2266 | /* kernel mode address */ | |
230b1839 | 2267 | struct sockaddr_storage addr; |
1da177e4 LT |
2268 | |
2269 | /* user mode address pointers */ | |
2270 | struct sockaddr __user *uaddr; | |
08adb7da | 2271 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
89bddce5 | 2272 | |
08adb7da | 2273 | msg_sys->msg_name = &addr; |
1da177e4 | 2274 | |
f3d33426 | 2275 | if (MSG_CMSG_COMPAT & flags) |
08adb7da | 2276 | err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov); |
f3d33426 | 2277 | else |
08adb7da | 2278 | err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov); |
1da177e4 | 2279 | if (err < 0) |
da184284 | 2280 | return err; |
1da177e4 | 2281 | |
a2e27255 ACM |
2282 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2283 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2284 | |
f3d33426 HFS |
2285 | /* We assume all kernel code knows the size of sockaddr_storage */ |
2286 | msg_sys->msg_namelen = 0; | |
2287 | ||
1da177e4 LT |
2288 | if (sock->file->f_flags & O_NONBLOCK) |
2289 | flags |= MSG_DONTWAIT; | |
2da62906 | 2290 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, flags); |
1da177e4 LT |
2291 | if (err < 0) |
2292 | goto out_freeiov; | |
2293 | len = err; | |
2294 | ||
2295 | if (uaddr != NULL) { | |
43db362d | 2296 | err = move_addr_to_user(&addr, |
a2e27255 | 2297 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2298 | uaddr_len); |
1da177e4 LT |
2299 | if (err < 0) |
2300 | goto out_freeiov; | |
2301 | } | |
a2e27255 | 2302 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2303 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2304 | if (err) |
2305 | goto out_freeiov; | |
2306 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2307 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2308 | &msg_compat->msg_controllen); |
2309 | else | |
a2e27255 | 2310 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2311 | &msg->msg_controllen); |
2312 | if (err) | |
2313 | goto out_freeiov; | |
2314 | err = len; | |
2315 | ||
2316 | out_freeiov: | |
da184284 | 2317 | kfree(iov); |
a2e27255 ACM |
2318 | return err; |
2319 | } | |
2320 | ||
2321 | /* | |
2322 | * BSD recvmsg interface | |
2323 | */ | |
2324 | ||
e1834a32 DB |
2325 | long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned int flags, |
2326 | bool forbid_cmsg_compat) | |
a2e27255 ACM |
2327 | { |
2328 | int fput_needed, err; | |
2329 | struct msghdr msg_sys; | |
1be374a0 AL |
2330 | struct socket *sock; |
2331 | ||
e1834a32 DB |
2332 | if (forbid_cmsg_compat && (flags & MSG_CMSG_COMPAT)) |
2333 | return -EINVAL; | |
2334 | ||
1be374a0 | 2335 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
a2e27255 ACM |
2336 | if (!sock) |
2337 | goto out; | |
2338 | ||
a7526eb5 | 2339 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
a2e27255 | 2340 | |
6cb153ca | 2341 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2342 | out: |
2343 | return err; | |
2344 | } | |
2345 | ||
666547ff | 2346 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
a7526eb5 AL |
2347 | unsigned int, flags) |
2348 | { | |
e1834a32 | 2349 | return __sys_recvmsg(fd, msg, flags, true); |
a7526eb5 AL |
2350 | } |
2351 | ||
a2e27255 ACM |
2352 | /* |
2353 | * Linux recvmmsg interface | |
2354 | */ | |
2355 | ||
2356 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2357 | unsigned int flags, struct timespec *timeout) | |
2358 | { | |
2359 | int fput_needed, err, datagrams; | |
2360 | struct socket *sock; | |
2361 | struct mmsghdr __user *entry; | |
d7256d0e | 2362 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 | 2363 | struct msghdr msg_sys; |
766b9f92 DD |
2364 | struct timespec64 end_time; |
2365 | struct timespec64 timeout64; | |
a2e27255 ACM |
2366 | |
2367 | if (timeout && | |
2368 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2369 | timeout->tv_nsec)) | |
2370 | return -EINVAL; | |
2371 | ||
2372 | datagrams = 0; | |
2373 | ||
2374 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2375 | if (!sock) | |
2376 | return err; | |
2377 | ||
7797dc41 SHY |
2378 | if (likely(!(flags & MSG_ERRQUEUE))) { |
2379 | err = sock_error(sock->sk); | |
2380 | if (err) { | |
2381 | datagrams = err; | |
2382 | goto out_put; | |
2383 | } | |
e623a9e9 | 2384 | } |
a2e27255 ACM |
2385 | |
2386 | entry = mmsg; | |
d7256d0e | 2387 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2388 | |
2389 | while (datagrams < vlen) { | |
2390 | /* | |
2391 | * No need to ask LSM for more than the first datagram. | |
2392 | */ | |
d7256d0e | 2393 | if (MSG_CMSG_COMPAT & flags) { |
666547ff | 2394 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
a7526eb5 AL |
2395 | &msg_sys, flags & ~MSG_WAITFORONE, |
2396 | datagrams); | |
d7256d0e JMG |
2397 | if (err < 0) |
2398 | break; | |
2399 | err = __put_user(err, &compat_entry->msg_len); | |
2400 | ++compat_entry; | |
2401 | } else { | |
a7526eb5 | 2402 | err = ___sys_recvmsg(sock, |
666547ff | 2403 | (struct user_msghdr __user *)entry, |
a7526eb5 AL |
2404 | &msg_sys, flags & ~MSG_WAITFORONE, |
2405 | datagrams); | |
d7256d0e JMG |
2406 | if (err < 0) |
2407 | break; | |
2408 | err = put_user(err, &entry->msg_len); | |
2409 | ++entry; | |
2410 | } | |
2411 | ||
a2e27255 ACM |
2412 | if (err) |
2413 | break; | |
a2e27255 ACM |
2414 | ++datagrams; |
2415 | ||
71c5c159 BB |
2416 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2417 | if (flags & MSG_WAITFORONE) | |
2418 | flags |= MSG_DONTWAIT; | |
2419 | ||
a2e27255 | 2420 | if (timeout) { |
766b9f92 DD |
2421 | ktime_get_ts64(&timeout64); |
2422 | *timeout = timespec64_to_timespec( | |
2423 | timespec64_sub(end_time, timeout64)); | |
a2e27255 ACM |
2424 | if (timeout->tv_sec < 0) { |
2425 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2426 | break; | |
2427 | } | |
2428 | ||
2429 | /* Timeout, return less than vlen datagrams */ | |
2430 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2431 | break; | |
2432 | } | |
2433 | ||
2434 | /* Out of band data, return right away */ | |
2435 | if (msg_sys.msg_flags & MSG_OOB) | |
2436 | break; | |
a78cb84c | 2437 | cond_resched(); |
a2e27255 ACM |
2438 | } |
2439 | ||
a2e27255 | 2440 | if (err == 0) |
34b88a68 ACM |
2441 | goto out_put; |
2442 | ||
2443 | if (datagrams == 0) { | |
2444 | datagrams = err; | |
2445 | goto out_put; | |
2446 | } | |
a2e27255 | 2447 | |
34b88a68 ACM |
2448 | /* |
2449 | * We may return less entries than requested (vlen) if the | |
2450 | * sock is non block and there aren't enough datagrams... | |
2451 | */ | |
2452 | if (err != -EAGAIN) { | |
a2e27255 | 2453 | /* |
34b88a68 ACM |
2454 | * ... or if recvmsg returns an error after we |
2455 | * received some datagrams, where we record the | |
2456 | * error to return on the next call or if the | |
2457 | * app asks about it using getsockopt(SO_ERROR). | |
a2e27255 | 2458 | */ |
34b88a68 | 2459 | sock->sk->sk_err = -err; |
a2e27255 | 2460 | } |
34b88a68 ACM |
2461 | out_put: |
2462 | fput_light(sock->file, fput_needed); | |
a2e27255 | 2463 | |
34b88a68 | 2464 | return datagrams; |
a2e27255 ACM |
2465 | } |
2466 | ||
1255e269 DB |
2467 | static int do_sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, |
2468 | unsigned int vlen, unsigned int flags, | |
2469 | struct timespec __user *timeout) | |
a2e27255 ACM |
2470 | { |
2471 | int datagrams; | |
2472 | struct timespec timeout_sys; | |
2473 | ||
1be374a0 AL |
2474 | if (flags & MSG_CMSG_COMPAT) |
2475 | return -EINVAL; | |
2476 | ||
a2e27255 ACM |
2477 | if (!timeout) |
2478 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2479 | ||
2480 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2481 | return -EFAULT; | |
2482 | ||
2483 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2484 | ||
2485 | if (datagrams > 0 && | |
2486 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2487 | datagrams = -EFAULT; | |
2488 | ||
2489 | return datagrams; | |
2490 | } | |
2491 | ||
1255e269 DB |
2492 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
2493 | unsigned int, vlen, unsigned int, flags, | |
2494 | struct timespec __user *, timeout) | |
2495 | { | |
2496 | return do_sys_recvmmsg(fd, mmsg, vlen, flags, timeout); | |
2497 | } | |
2498 | ||
a2e27255 | 2499 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
1da177e4 LT |
2500 | /* Argument list sizes for sys_socketcall */ |
2501 | #define AL(x) ((x) * sizeof(unsigned long)) | |
228e548e | 2502 | static const unsigned char nargs[21] = { |
c6d409cf ED |
2503 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2504 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2505 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
228e548e | 2506 | AL(4), AL(5), AL(4) |
89bddce5 SH |
2507 | }; |
2508 | ||
1da177e4 LT |
2509 | #undef AL |
2510 | ||
2511 | /* | |
89bddce5 | 2512 | * System call vectors. |
1da177e4 LT |
2513 | * |
2514 | * Argument checking cleaned up. Saved 20% in size. | |
2515 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2516 | * it is set by the callees. |
1da177e4 LT |
2517 | */ |
2518 | ||
3e0fa65f | 2519 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 | 2520 | { |
2950fa9d | 2521 | unsigned long a[AUDITSC_ARGS]; |
89bddce5 | 2522 | unsigned long a0, a1; |
1da177e4 | 2523 | int err; |
47379052 | 2524 | unsigned int len; |
1da177e4 | 2525 | |
228e548e | 2526 | if (call < 1 || call > SYS_SENDMMSG) |
1da177e4 LT |
2527 | return -EINVAL; |
2528 | ||
47379052 AV |
2529 | len = nargs[call]; |
2530 | if (len > sizeof(a)) | |
2531 | return -EINVAL; | |
2532 | ||
1da177e4 | 2533 | /* copy_from_user should be SMP safe. */ |
47379052 | 2534 | if (copy_from_user(a, args, len)) |
1da177e4 | 2535 | return -EFAULT; |
3ec3b2fb | 2536 | |
2950fa9d CG |
2537 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
2538 | if (err) | |
2539 | return err; | |
3ec3b2fb | 2540 | |
89bddce5 SH |
2541 | a0 = a[0]; |
2542 | a1 = a[1]; | |
2543 | ||
2544 | switch (call) { | |
2545 | case SYS_SOCKET: | |
9d6a15c3 | 2546 | err = __sys_socket(a0, a1, a[2]); |
89bddce5 SH |
2547 | break; |
2548 | case SYS_BIND: | |
a87d35d8 | 2549 | err = __sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
89bddce5 SH |
2550 | break; |
2551 | case SYS_CONNECT: | |
1387c2c2 | 2552 | err = __sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
89bddce5 SH |
2553 | break; |
2554 | case SYS_LISTEN: | |
25e290ee | 2555 | err = __sys_listen(a0, a1); |
89bddce5 SH |
2556 | break; |
2557 | case SYS_ACCEPT: | |
4541e805 DB |
2558 | err = __sys_accept4(a0, (struct sockaddr __user *)a1, |
2559 | (int __user *)a[2], 0); | |
89bddce5 SH |
2560 | break; |
2561 | case SYS_GETSOCKNAME: | |
2562 | err = | |
8882a107 DB |
2563 | __sys_getsockname(a0, (struct sockaddr __user *)a1, |
2564 | (int __user *)a[2]); | |
89bddce5 SH |
2565 | break; |
2566 | case SYS_GETPEERNAME: | |
2567 | err = | |
b21c8f83 DB |
2568 | __sys_getpeername(a0, (struct sockaddr __user *)a1, |
2569 | (int __user *)a[2]); | |
89bddce5 SH |
2570 | break; |
2571 | case SYS_SOCKETPAIR: | |
6debc8d8 | 2572 | err = __sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
89bddce5 SH |
2573 | break; |
2574 | case SYS_SEND: | |
f3bf896b DB |
2575 | err = __sys_sendto(a0, (void __user *)a1, a[2], a[3], |
2576 | NULL, 0); | |
89bddce5 SH |
2577 | break; |
2578 | case SYS_SENDTO: | |
211b634b DB |
2579 | err = __sys_sendto(a0, (void __user *)a1, a[2], a[3], |
2580 | (struct sockaddr __user *)a[4], a[5]); | |
89bddce5 SH |
2581 | break; |
2582 | case SYS_RECV: | |
d27e9afc DB |
2583 | err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
2584 | NULL, NULL); | |
89bddce5 SH |
2585 | break; |
2586 | case SYS_RECVFROM: | |
7a09e1eb DB |
2587 | err = __sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
2588 | (struct sockaddr __user *)a[4], | |
2589 | (int __user *)a[5]); | |
89bddce5 SH |
2590 | break; |
2591 | case SYS_SHUTDOWN: | |
005a1aea | 2592 | err = __sys_shutdown(a0, a1); |
89bddce5 SH |
2593 | break; |
2594 | case SYS_SETSOCKOPT: | |
cc36dca0 DB |
2595 | err = __sys_setsockopt(a0, a1, a[2], (char __user *)a[3], |
2596 | a[4]); | |
89bddce5 SH |
2597 | break; |
2598 | case SYS_GETSOCKOPT: | |
2599 | err = | |
13a2d70e DB |
2600 | __sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
2601 | (int __user *)a[4]); | |
89bddce5 SH |
2602 | break; |
2603 | case SYS_SENDMSG: | |
e1834a32 DB |
2604 | err = __sys_sendmsg(a0, (struct user_msghdr __user *)a1, |
2605 | a[2], true); | |
89bddce5 | 2606 | break; |
228e548e | 2607 | case SYS_SENDMMSG: |
e1834a32 DB |
2608 | err = __sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], |
2609 | a[3], true); | |
228e548e | 2610 | break; |
89bddce5 | 2611 | case SYS_RECVMSG: |
e1834a32 DB |
2612 | err = __sys_recvmsg(a0, (struct user_msghdr __user *)a1, |
2613 | a[2], true); | |
89bddce5 | 2614 | break; |
a2e27255 | 2615 | case SYS_RECVMMSG: |
1255e269 DB |
2616 | err = do_sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], |
2617 | a[3], (struct timespec __user *)a[4]); | |
a2e27255 | 2618 | break; |
de11defe | 2619 | case SYS_ACCEPT4: |
4541e805 DB |
2620 | err = __sys_accept4(a0, (struct sockaddr __user *)a1, |
2621 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2622 | break; |
89bddce5 SH |
2623 | default: |
2624 | err = -EINVAL; | |
2625 | break; | |
1da177e4 LT |
2626 | } |
2627 | return err; | |
2628 | } | |
2629 | ||
89bddce5 | 2630 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2631 | |
55737fda SH |
2632 | /** |
2633 | * sock_register - add a socket protocol handler | |
2634 | * @ops: description of protocol | |
2635 | * | |
1da177e4 LT |
2636 | * This function is called by a protocol handler that wants to |
2637 | * advertise its address family, and have it linked into the | |
e793c0f7 | 2638 | * socket interface. The value ops->family corresponds to the |
55737fda | 2639 | * socket system call protocol family. |
1da177e4 | 2640 | */ |
f0fd27d4 | 2641 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2642 | { |
2643 | int err; | |
2644 | ||
2645 | if (ops->family >= NPROTO) { | |
3410f22e | 2646 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
1da177e4 LT |
2647 | return -ENOBUFS; |
2648 | } | |
55737fda SH |
2649 | |
2650 | spin_lock(&net_family_lock); | |
190683a9 ED |
2651 | if (rcu_dereference_protected(net_families[ops->family], |
2652 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2653 | err = -EEXIST; |
2654 | else { | |
cf778b00 | 2655 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2656 | err = 0; |
2657 | } | |
55737fda SH |
2658 | spin_unlock(&net_family_lock); |
2659 | ||
3410f22e | 2660 | pr_info("NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2661 | return err; |
2662 | } | |
c6d409cf | 2663 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2664 | |
55737fda SH |
2665 | /** |
2666 | * sock_unregister - remove a protocol handler | |
2667 | * @family: protocol family to remove | |
2668 | * | |
1da177e4 LT |
2669 | * This function is called by a protocol handler that wants to |
2670 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2671 | * new socket creation. |
2672 | * | |
2673 | * If protocol handler is a module, then it can use module reference | |
2674 | * counts to protect against new references. If protocol handler is not | |
2675 | * a module then it needs to provide its own protection in | |
2676 | * the ops->create routine. | |
1da177e4 | 2677 | */ |
f0fd27d4 | 2678 | void sock_unregister(int family) |
1da177e4 | 2679 | { |
f0fd27d4 | 2680 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2681 | |
55737fda | 2682 | spin_lock(&net_family_lock); |
a9b3cd7f | 2683 | RCU_INIT_POINTER(net_families[family], NULL); |
55737fda SH |
2684 | spin_unlock(&net_family_lock); |
2685 | ||
2686 | synchronize_rcu(); | |
2687 | ||
3410f22e | 2688 | pr_info("NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2689 | } |
c6d409cf | 2690 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2691 | |
bf2ae2e4 XL |
2692 | bool sock_is_registered(int family) |
2693 | { | |
2694 | return family < NPROTO && rcu_access_pointer(net_families[family]); | |
2695 | } | |
2696 | ||
77d76ea3 | 2697 | static int __init sock_init(void) |
1da177e4 | 2698 | { |
b3e19d92 | 2699 | int err; |
2ca794e5 EB |
2700 | /* |
2701 | * Initialize the network sysctl infrastructure. | |
2702 | */ | |
2703 | err = net_sysctl_init(); | |
2704 | if (err) | |
2705 | goto out; | |
b3e19d92 | 2706 | |
1da177e4 | 2707 | /* |
89bddce5 | 2708 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2709 | */ |
2710 | skb_init(); | |
1da177e4 LT |
2711 | |
2712 | /* | |
89bddce5 | 2713 | * Initialize the protocols module. |
1da177e4 LT |
2714 | */ |
2715 | ||
2716 | init_inodecache(); | |
b3e19d92 NP |
2717 | |
2718 | err = register_filesystem(&sock_fs_type); | |
2719 | if (err) | |
2720 | goto out_fs; | |
1da177e4 | 2721 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2722 | if (IS_ERR(sock_mnt)) { |
2723 | err = PTR_ERR(sock_mnt); | |
2724 | goto out_mount; | |
2725 | } | |
77d76ea3 AK |
2726 | |
2727 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2728 | */ |
2729 | ||
2730 | #ifdef CONFIG_NETFILTER | |
6d11cfdb PNA |
2731 | err = netfilter_init(); |
2732 | if (err) | |
2733 | goto out; | |
1da177e4 | 2734 | #endif |
cbeb321a | 2735 | |
408eccce | 2736 | ptp_classifier_init(); |
c1f19b51 | 2737 | |
b3e19d92 NP |
2738 | out: |
2739 | return err; | |
2740 | ||
2741 | out_mount: | |
2742 | unregister_filesystem(&sock_fs_type); | |
2743 | out_fs: | |
2744 | goto out; | |
1da177e4 LT |
2745 | } |
2746 | ||
77d76ea3 AK |
2747 | core_initcall(sock_init); /* early initcall */ |
2748 | ||
1da177e4 LT |
2749 | #ifdef CONFIG_PROC_FS |
2750 | void socket_seq_show(struct seq_file *seq) | |
2751 | { | |
648845ab TZ |
2752 | seq_printf(seq, "sockets: used %d\n", |
2753 | sock_inuse_get(seq->private)); | |
1da177e4 | 2754 | } |
89bddce5 | 2755 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2756 | |
89bbfc95 | 2757 | #ifdef CONFIG_COMPAT |
6b96018b | 2758 | static int do_siocgstamp(struct net *net, struct socket *sock, |
644595f8 | 2759 | unsigned int cmd, void __user *up) |
7a229387 | 2760 | { |
7a229387 AB |
2761 | mm_segment_t old_fs = get_fs(); |
2762 | struct timeval ktv; | |
2763 | int err; | |
2764 | ||
2765 | set_fs(KERNEL_DS); | |
6b96018b | 2766 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 | 2767 | set_fs(old_fs); |
644595f8 | 2768 | if (!err) |
ed6fe9d6 | 2769 | err = compat_put_timeval(&ktv, up); |
644595f8 | 2770 | |
7a229387 AB |
2771 | return err; |
2772 | } | |
2773 | ||
6b96018b | 2774 | static int do_siocgstampns(struct net *net, struct socket *sock, |
644595f8 | 2775 | unsigned int cmd, void __user *up) |
7a229387 | 2776 | { |
7a229387 AB |
2777 | mm_segment_t old_fs = get_fs(); |
2778 | struct timespec kts; | |
2779 | int err; | |
2780 | ||
2781 | set_fs(KERNEL_DS); | |
6b96018b | 2782 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 | 2783 | set_fs(old_fs); |
644595f8 | 2784 | if (!err) |
ed6fe9d6 | 2785 | err = compat_put_timespec(&kts, up); |
644595f8 | 2786 | |
7a229387 AB |
2787 | return err; |
2788 | } | |
2789 | ||
36fd633e | 2790 | static int compat_dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2791 | { |
6b96018b | 2792 | struct compat_ifconf ifc32; |
7a229387 | 2793 | struct ifconf ifc; |
7a229387 AB |
2794 | int err; |
2795 | ||
6b96018b | 2796 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2797 | return -EFAULT; |
2798 | ||
36fd633e AV |
2799 | ifc.ifc_len = ifc32.ifc_len; |
2800 | ifc.ifc_req = compat_ptr(ifc32.ifcbuf); | |
7a229387 | 2801 | |
36fd633e AV |
2802 | rtnl_lock(); |
2803 | err = dev_ifconf(net, &ifc, sizeof(struct compat_ifreq)); | |
2804 | rtnl_unlock(); | |
7a229387 AB |
2805 | if (err) |
2806 | return err; | |
2807 | ||
36fd633e | 2808 | ifc32.ifc_len = ifc.ifc_len; |
6b96018b | 2809 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2810 | return -EFAULT; |
2811 | ||
2812 | return 0; | |
2813 | } | |
2814 | ||
6b96018b | 2815 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 | 2816 | { |
3a7da39d BH |
2817 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
2818 | bool convert_in = false, convert_out = false; | |
44c02a2c AV |
2819 | size_t buf_size = 0; |
2820 | struct ethtool_rxnfc __user *rxnfc = NULL; | |
2821 | struct ifreq ifr; | |
3a7da39d BH |
2822 | u32 rule_cnt = 0, actual_rule_cnt; |
2823 | u32 ethcmd; | |
7a229387 | 2824 | u32 data; |
3a7da39d | 2825 | int ret; |
7a229387 | 2826 | |
3a7da39d BH |
2827 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
2828 | return -EFAULT; | |
7a229387 | 2829 | |
3a7da39d BH |
2830 | compat_rxnfc = compat_ptr(data); |
2831 | ||
2832 | if (get_user(ethcmd, &compat_rxnfc->cmd)) | |
7a229387 AB |
2833 | return -EFAULT; |
2834 | ||
3a7da39d BH |
2835 | /* Most ethtool structures are defined without padding. |
2836 | * Unfortunately struct ethtool_rxnfc is an exception. | |
2837 | */ | |
2838 | switch (ethcmd) { | |
2839 | default: | |
2840 | break; | |
2841 | case ETHTOOL_GRXCLSRLALL: | |
2842 | /* Buffer size is variable */ | |
2843 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) | |
2844 | return -EFAULT; | |
2845 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) | |
2846 | return -ENOMEM; | |
2847 | buf_size += rule_cnt * sizeof(u32); | |
2848 | /* fall through */ | |
2849 | case ETHTOOL_GRXRINGS: | |
2850 | case ETHTOOL_GRXCLSRLCNT: | |
2851 | case ETHTOOL_GRXCLSRULE: | |
55664f32 | 2852 | case ETHTOOL_SRXCLSRLINS: |
3a7da39d BH |
2853 | convert_out = true; |
2854 | /* fall through */ | |
2855 | case ETHTOOL_SRXCLSRLDEL: | |
3a7da39d BH |
2856 | buf_size += sizeof(struct ethtool_rxnfc); |
2857 | convert_in = true; | |
44c02a2c | 2858 | rxnfc = compat_alloc_user_space(buf_size); |
3a7da39d BH |
2859 | break; |
2860 | } | |
2861 | ||
44c02a2c | 2862 | if (copy_from_user(&ifr.ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
7a229387 AB |
2863 | return -EFAULT; |
2864 | ||
44c02a2c | 2865 | ifr.ifr_data = convert_in ? rxnfc : (void __user *)compat_rxnfc; |
7a229387 | 2866 | |
3a7da39d | 2867 | if (convert_in) { |
127fe533 | 2868 | /* We expect there to be holes between fs.m_ext and |
3a7da39d BH |
2869 | * fs.ring_cookie and at the end of fs, but nowhere else. |
2870 | */ | |
127fe533 AD |
2871 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
2872 | sizeof(compat_rxnfc->fs.m_ext) != | |
2873 | offsetof(struct ethtool_rxnfc, fs.m_ext) + | |
2874 | sizeof(rxnfc->fs.m_ext)); | |
3a7da39d BH |
2875 | BUILD_BUG_ON( |
2876 | offsetof(struct compat_ethtool_rxnfc, fs.location) - | |
2877 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != | |
2878 | offsetof(struct ethtool_rxnfc, fs.location) - | |
2879 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); | |
2880 | ||
2881 | if (copy_in_user(rxnfc, compat_rxnfc, | |
954b1244 SH |
2882 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
2883 | (void __user *)rxnfc) || | |
3a7da39d BH |
2884 | copy_in_user(&rxnfc->fs.ring_cookie, |
2885 | &compat_rxnfc->fs.ring_cookie, | |
954b1244 SH |
2886 | (void __user *)(&rxnfc->fs.location + 1) - |
2887 | (void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2888 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
2889 | sizeof(rxnfc->rule_cnt))) | |
2890 | return -EFAULT; | |
2891 | } | |
2892 | ||
44c02a2c | 2893 | ret = dev_ioctl(net, SIOCETHTOOL, &ifr, NULL); |
3a7da39d BH |
2894 | if (ret) |
2895 | return ret; | |
2896 | ||
2897 | if (convert_out) { | |
2898 | if (copy_in_user(compat_rxnfc, rxnfc, | |
954b1244 SH |
2899 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
2900 | (const void __user *)rxnfc) || | |
3a7da39d BH |
2901 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
2902 | &rxnfc->fs.ring_cookie, | |
954b1244 SH |
2903 | (const void __user *)(&rxnfc->fs.location + 1) - |
2904 | (const void __user *)&rxnfc->fs.ring_cookie) || | |
3a7da39d BH |
2905 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
2906 | sizeof(rxnfc->rule_cnt))) | |
2907 | return -EFAULT; | |
2908 | ||
2909 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { | |
2910 | /* As an optimisation, we only copy the actual | |
2911 | * number of rules that the underlying | |
2912 | * function returned. Since Mallory might | |
2913 | * change the rule count in user memory, we | |
2914 | * check that it is less than the rule count | |
2915 | * originally given (as the user buffer size), | |
2916 | * which has been range-checked. | |
2917 | */ | |
2918 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) | |
2919 | return -EFAULT; | |
2920 | if (actual_rule_cnt < rule_cnt) | |
2921 | rule_cnt = actual_rule_cnt; | |
2922 | if (copy_in_user(&compat_rxnfc->rule_locs[0], | |
2923 | &rxnfc->rule_locs[0], | |
2924 | rule_cnt * sizeof(u32))) | |
2925 | return -EFAULT; | |
2926 | } | |
2927 | } | |
2928 | ||
2929 | return 0; | |
7a229387 AB |
2930 | } |
2931 | ||
7a50a240 AB |
2932 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2933 | { | |
7a50a240 | 2934 | compat_uptr_t uptr32; |
44c02a2c AV |
2935 | struct ifreq ifr; |
2936 | void __user *saved; | |
2937 | int err; | |
7a50a240 | 2938 | |
44c02a2c | 2939 | if (copy_from_user(&ifr, uifr32, sizeof(struct compat_ifreq))) |
7a50a240 AB |
2940 | return -EFAULT; |
2941 | ||
2942 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2943 | return -EFAULT; | |
2944 | ||
44c02a2c AV |
2945 | saved = ifr.ifr_settings.ifs_ifsu.raw_hdlc; |
2946 | ifr.ifr_settings.ifs_ifsu.raw_hdlc = compat_ptr(uptr32); | |
7a229387 | 2947 | |
44c02a2c AV |
2948 | err = dev_ioctl(net, SIOCWANDEV, &ifr, NULL); |
2949 | if (!err) { | |
2950 | ifr.ifr_settings.ifs_ifsu.raw_hdlc = saved; | |
2951 | if (copy_to_user(uifr32, &ifr, sizeof(struct compat_ifreq))) | |
2952 | err = -EFAULT; | |
ccbd6a5a | 2953 | } |
44c02a2c | 2954 | return err; |
7a229387 AB |
2955 | } |
2956 | ||
590d4693 BH |
2957 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
2958 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, | |
6b96018b | 2959 | struct compat_ifreq __user *u_ifreq32) |
7a229387 | 2960 | { |
44c02a2c | 2961 | struct ifreq ifreq; |
7a229387 AB |
2962 | u32 data32; |
2963 | ||
44c02a2c | 2964 | if (copy_from_user(ifreq.ifr_name, u_ifreq32->ifr_name, IFNAMSIZ)) |
7a229387 | 2965 | return -EFAULT; |
44c02a2c | 2966 | if (get_user(data32, &u_ifreq32->ifr_data)) |
7a229387 | 2967 | return -EFAULT; |
44c02a2c | 2968 | ifreq.ifr_data = compat_ptr(data32); |
7a229387 | 2969 | |
44c02a2c | 2970 | return dev_ioctl(net, cmd, &ifreq, NULL); |
7a229387 AB |
2971 | } |
2972 | ||
a2116ed2 AB |
2973 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2974 | struct compat_ifreq __user *uifr32) | |
2975 | { | |
2976 | struct ifreq ifr; | |
2977 | struct compat_ifmap __user *uifmap32; | |
a2116ed2 AB |
2978 | int err; |
2979 | ||
2980 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2981 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
2982 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
2983 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2984 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2985 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2986 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2987 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
2988 | if (err) |
2989 | return -EFAULT; | |
2990 | ||
44c02a2c | 2991 | err = dev_ioctl(net, cmd, &ifr, NULL); |
a2116ed2 AB |
2992 | |
2993 | if (cmd == SIOCGIFMAP && !err) { | |
2994 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
3ddc5b46 MD |
2995 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
2996 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2997 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2998 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2999 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
3000 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); | |
a2116ed2 AB |
3001 | if (err) |
3002 | err = -EFAULT; | |
3003 | } | |
3004 | return err; | |
3005 | } | |
3006 | ||
7a229387 | 3007 | struct rtentry32 { |
c6d409cf | 3008 | u32 rt_pad1; |
7a229387 AB |
3009 | struct sockaddr rt_dst; /* target address */ |
3010 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
3011 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
3012 | unsigned short rt_flags; |
3013 | short rt_pad2; | |
3014 | u32 rt_pad3; | |
3015 | unsigned char rt_tos; | |
3016 | unsigned char rt_class; | |
3017 | short rt_pad4; | |
3018 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 3019 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
3020 | u32 rt_mtu; /* per route MTU/Window */ |
3021 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
3022 | unsigned short rt_irtt; /* Initial RTT */ |
3023 | }; | |
3024 | ||
3025 | struct in6_rtmsg32 { | |
3026 | struct in6_addr rtmsg_dst; | |
3027 | struct in6_addr rtmsg_src; | |
3028 | struct in6_addr rtmsg_gateway; | |
3029 | u32 rtmsg_type; | |
3030 | u16 rtmsg_dst_len; | |
3031 | u16 rtmsg_src_len; | |
3032 | u32 rtmsg_metric; | |
3033 | u32 rtmsg_info; | |
3034 | u32 rtmsg_flags; | |
3035 | s32 rtmsg_ifindex; | |
3036 | }; | |
3037 | ||
6b96018b AB |
3038 | static int routing_ioctl(struct net *net, struct socket *sock, |
3039 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
3040 | { |
3041 | int ret; | |
3042 | void *r = NULL; | |
3043 | struct in6_rtmsg r6; | |
3044 | struct rtentry r4; | |
3045 | char devname[16]; | |
3046 | u32 rtdev; | |
3047 | mm_segment_t old_fs = get_fs(); | |
3048 | ||
6b96018b AB |
3049 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
3050 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 3051 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 3052 | 3 * sizeof(struct in6_addr)); |
3ddc5b46 MD |
3053 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
3054 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
3055 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
3056 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
3057 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
3058 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
3059 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
3060 | |
3061 | r = (void *) &r6; | |
3062 | } else { /* ipv4 */ | |
6b96018b | 3063 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 3064 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 3065 | 3 * sizeof(struct sockaddr)); |
3ddc5b46 MD |
3066 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
3067 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); | |
3068 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
3069 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); | |
3070 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
3071 | ret |= get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 3072 | if (rtdev) { |
c6d409cf | 3073 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
c3f52ae6 | 3074 | r4.rt_dev = (char __user __force *)devname; |
3075 | devname[15] = 0; | |
7a229387 AB |
3076 | } else |
3077 | r4.rt_dev = NULL; | |
3078 | ||
3079 | r = (void *) &r4; | |
3080 | } | |
3081 | ||
3082 | if (ret) { | |
3083 | ret = -EFAULT; | |
3084 | goto out; | |
3085 | } | |
3086 | ||
c6d409cf | 3087 | set_fs(KERNEL_DS); |
6b96018b | 3088 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 3089 | set_fs(old_fs); |
7a229387 AB |
3090 | |
3091 | out: | |
7a229387 AB |
3092 | return ret; |
3093 | } | |
3094 | ||
3095 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
3096 | * for some operations; this forces use of the newer bridge-utils that | |
25985edc | 3097 | * use compatible ioctls |
7a229387 | 3098 | */ |
6b96018b | 3099 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 3100 | { |
6b96018b | 3101 | compat_ulong_t tmp; |
7a229387 | 3102 | |
6b96018b | 3103 | if (get_user(tmp, argp)) |
7a229387 AB |
3104 | return -EFAULT; |
3105 | if (tmp == BRCTL_GET_VERSION) | |
3106 | return BRCTL_VERSION + 1; | |
3107 | return -EINVAL; | |
3108 | } | |
3109 | ||
6b96018b AB |
3110 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
3111 | unsigned int cmd, unsigned long arg) | |
3112 | { | |
3113 | void __user *argp = compat_ptr(arg); | |
3114 | struct sock *sk = sock->sk; | |
3115 | struct net *net = sock_net(sk); | |
7a229387 | 3116 | |
6b96018b | 3117 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
590d4693 | 3118 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3119 | |
3120 | switch (cmd) { | |
3121 | case SIOCSIFBR: | |
3122 | case SIOCGIFBR: | |
3123 | return old_bridge_ioctl(argp); | |
6b96018b | 3124 | case SIOCGIFCONF: |
36fd633e | 3125 | return compat_dev_ifconf(net, argp); |
6b96018b AB |
3126 | case SIOCETHTOOL: |
3127 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
3128 | case SIOCWANDEV: |
3129 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
3130 | case SIOCGIFMAP: |
3131 | case SIOCSIFMAP: | |
3132 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
3133 | case SIOCADDRT: |
3134 | case SIOCDELRT: | |
3135 | return routing_ioctl(net, sock, cmd, argp); | |
3136 | case SIOCGSTAMP: | |
3137 | return do_siocgstamp(net, sock, cmd, argp); | |
3138 | case SIOCGSTAMPNS: | |
3139 | return do_siocgstampns(net, sock, cmd, argp); | |
590d4693 BH |
3140 | case SIOCBONDSLAVEINFOQUERY: |
3141 | case SIOCBONDINFOQUERY: | |
a2116ed2 | 3142 | case SIOCSHWTSTAMP: |
fd468c74 | 3143 | case SIOCGHWTSTAMP: |
590d4693 | 3144 | return compat_ifr_data_ioctl(net, cmd, argp); |
6b96018b AB |
3145 | |
3146 | case FIOSETOWN: | |
3147 | case SIOCSPGRP: | |
3148 | case FIOGETOWN: | |
3149 | case SIOCGPGRP: | |
3150 | case SIOCBRADDBR: | |
3151 | case SIOCBRDELBR: | |
3152 | case SIOCGIFVLAN: | |
3153 | case SIOCSIFVLAN: | |
3154 | case SIOCADDDLCI: | |
3155 | case SIOCDELDLCI: | |
c62cce2c | 3156 | case SIOCGSKNS: |
6b96018b AB |
3157 | return sock_ioctl(file, cmd, arg); |
3158 | ||
3159 | case SIOCGIFFLAGS: | |
3160 | case SIOCSIFFLAGS: | |
3161 | case SIOCGIFMETRIC: | |
3162 | case SIOCSIFMETRIC: | |
3163 | case SIOCGIFMTU: | |
3164 | case SIOCSIFMTU: | |
3165 | case SIOCGIFMEM: | |
3166 | case SIOCSIFMEM: | |
3167 | case SIOCGIFHWADDR: | |
3168 | case SIOCSIFHWADDR: | |
3169 | case SIOCADDMULTI: | |
3170 | case SIOCDELMULTI: | |
3171 | case SIOCGIFINDEX: | |
6b96018b AB |
3172 | case SIOCGIFADDR: |
3173 | case SIOCSIFADDR: | |
3174 | case SIOCSIFHWBROADCAST: | |
6b96018b | 3175 | case SIOCDIFADDR: |
6b96018b AB |
3176 | case SIOCGIFBRDADDR: |
3177 | case SIOCSIFBRDADDR: | |
3178 | case SIOCGIFDSTADDR: | |
3179 | case SIOCSIFDSTADDR: | |
3180 | case SIOCGIFNETMASK: | |
3181 | case SIOCSIFNETMASK: | |
3182 | case SIOCSIFPFLAGS: | |
3183 | case SIOCGIFPFLAGS: | |
3184 | case SIOCGIFTXQLEN: | |
3185 | case SIOCSIFTXQLEN: | |
3186 | case SIOCBRADDIF: | |
3187 | case SIOCBRDELIF: | |
9177efd3 AB |
3188 | case SIOCSIFNAME: |
3189 | case SIOCGMIIPHY: | |
3190 | case SIOCGMIIREG: | |
3191 | case SIOCSMIIREG: | |
6b96018b AB |
3192 | case SIOCSARP: |
3193 | case SIOCGARP: | |
3194 | case SIOCDARP: | |
6b96018b | 3195 | case SIOCATMARK: |
f92d4fc9 AV |
3196 | case SIOCBONDENSLAVE: |
3197 | case SIOCBONDRELEASE: | |
3198 | case SIOCBONDSETHWADDR: | |
3199 | case SIOCBONDCHANGEACTIVE: | |
4cf808e7 | 3200 | case SIOCGIFNAME: |
9177efd3 AB |
3201 | return sock_do_ioctl(net, sock, cmd, arg); |
3202 | } | |
3203 | ||
6b96018b AB |
3204 | return -ENOIOCTLCMD; |
3205 | } | |
7a229387 | 3206 | |
95c96174 | 3207 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
89bddce5 | 3208 | unsigned long arg) |
89bbfc95 SP |
3209 | { |
3210 | struct socket *sock = file->private_data; | |
3211 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3212 | struct sock *sk; |
3213 | struct net *net; | |
3214 | ||
3215 | sk = sock->sk; | |
3216 | net = sock_net(sk); | |
89bbfc95 SP |
3217 | |
3218 | if (sock->ops->compat_ioctl) | |
3219 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3220 | ||
87de87d5 DM |
3221 | if (ret == -ENOIOCTLCMD && |
3222 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3223 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3224 | ||
6b96018b AB |
3225 | if (ret == -ENOIOCTLCMD) |
3226 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3227 | ||
89bbfc95 SP |
3228 | return ret; |
3229 | } | |
3230 | #endif | |
3231 | ||
ac5a488e SS |
3232 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3233 | { | |
3234 | return sock->ops->bind(sock, addr, addrlen); | |
3235 | } | |
c6d409cf | 3236 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3237 | |
3238 | int kernel_listen(struct socket *sock, int backlog) | |
3239 | { | |
3240 | return sock->ops->listen(sock, backlog); | |
3241 | } | |
c6d409cf | 3242 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3243 | |
3244 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3245 | { | |
3246 | struct sock *sk = sock->sk; | |
3247 | int err; | |
3248 | ||
3249 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3250 | newsock); | |
3251 | if (err < 0) | |
3252 | goto done; | |
3253 | ||
cdfbabfb | 3254 | err = sock->ops->accept(sock, *newsock, flags, true); |
ac5a488e SS |
3255 | if (err < 0) { |
3256 | sock_release(*newsock); | |
fa8705b0 | 3257 | *newsock = NULL; |
ac5a488e SS |
3258 | goto done; |
3259 | } | |
3260 | ||
3261 | (*newsock)->ops = sock->ops; | |
1b08534e | 3262 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3263 | |
3264 | done: | |
3265 | return err; | |
3266 | } | |
c6d409cf | 3267 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3268 | |
3269 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3270 | int flags) |
ac5a488e SS |
3271 | { |
3272 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3273 | } | |
c6d409cf | 3274 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e | 3275 | |
9b2c45d4 | 3276 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr) |
ac5a488e | 3277 | { |
9b2c45d4 | 3278 | return sock->ops->getname(sock, addr, 0); |
ac5a488e | 3279 | } |
c6d409cf | 3280 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e | 3281 | |
9b2c45d4 | 3282 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr) |
ac5a488e | 3283 | { |
9b2c45d4 | 3284 | return sock->ops->getname(sock, addr, 1); |
ac5a488e | 3285 | } |
c6d409cf | 3286 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3287 | |
3288 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3289 | char *optval, int *optlen) | |
3290 | { | |
3291 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3292 | char __user *uoptval; |
3293 | int __user *uoptlen; | |
ac5a488e SS |
3294 | int err; |
3295 | ||
fb8621bb NK |
3296 | uoptval = (char __user __force *) optval; |
3297 | uoptlen = (int __user __force *) optlen; | |
3298 | ||
ac5a488e SS |
3299 | set_fs(KERNEL_DS); |
3300 | if (level == SOL_SOCKET) | |
fb8621bb | 3301 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3302 | else |
fb8621bb NK |
3303 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3304 | uoptlen); | |
ac5a488e SS |
3305 | set_fs(oldfs); |
3306 | return err; | |
3307 | } | |
c6d409cf | 3308 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3309 | |
3310 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3311 | char *optval, unsigned int optlen) |
ac5a488e SS |
3312 | { |
3313 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3314 | char __user *uoptval; |
ac5a488e SS |
3315 | int err; |
3316 | ||
fb8621bb NK |
3317 | uoptval = (char __user __force *) optval; |
3318 | ||
ac5a488e SS |
3319 | set_fs(KERNEL_DS); |
3320 | if (level == SOL_SOCKET) | |
fb8621bb | 3321 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3322 | else |
fb8621bb | 3323 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3324 | optlen); |
3325 | set_fs(oldfs); | |
3326 | return err; | |
3327 | } | |
c6d409cf | 3328 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3329 | |
3330 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3331 | size_t size, int flags) | |
3332 | { | |
3333 | if (sock->ops->sendpage) | |
3334 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3335 | ||
3336 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3337 | } | |
c6d409cf | 3338 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e | 3339 | |
306b13eb TH |
3340 | int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset, |
3341 | size_t size, int flags) | |
3342 | { | |
3343 | struct socket *sock = sk->sk_socket; | |
3344 | ||
3345 | if (sock->ops->sendpage_locked) | |
3346 | return sock->ops->sendpage_locked(sk, page, offset, size, | |
3347 | flags); | |
3348 | ||
3349 | return sock_no_sendpage_locked(sk, page, offset, size, flags); | |
3350 | } | |
3351 | EXPORT_SYMBOL(kernel_sendpage_locked); | |
3352 | ||
91cf45f0 TM |
3353 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3354 | { | |
3355 | return sock->ops->shutdown(sock, how); | |
3356 | } | |
91cf45f0 | 3357 | EXPORT_SYMBOL(kernel_sock_shutdown); |
113c3075 P |
3358 | |
3359 | /* This routine returns the IP overhead imposed by a socket i.e. | |
3360 | * the length of the underlying IP header, depending on whether | |
3361 | * this is an IPv4 or IPv6 socket and the length from IP options turned | |
57240d00 | 3362 | * on at the socket. Assumes that the caller has a lock on the socket. |
113c3075 P |
3363 | */ |
3364 | u32 kernel_sock_ip_overhead(struct sock *sk) | |
3365 | { | |
3366 | struct inet_sock *inet; | |
3367 | struct ip_options_rcu *opt; | |
3368 | u32 overhead = 0; | |
113c3075 P |
3369 | #if IS_ENABLED(CONFIG_IPV6) |
3370 | struct ipv6_pinfo *np; | |
3371 | struct ipv6_txoptions *optv6 = NULL; | |
3372 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
3373 | ||
3374 | if (!sk) | |
3375 | return overhead; | |
3376 | ||
113c3075 P |
3377 | switch (sk->sk_family) { |
3378 | case AF_INET: | |
3379 | inet = inet_sk(sk); | |
3380 | overhead += sizeof(struct iphdr); | |
3381 | opt = rcu_dereference_protected(inet->inet_opt, | |
614d79c0 | 3382 | sock_owned_by_user(sk)); |
113c3075 P |
3383 | if (opt) |
3384 | overhead += opt->opt.optlen; | |
3385 | return overhead; | |
3386 | #if IS_ENABLED(CONFIG_IPV6) | |
3387 | case AF_INET6: | |
3388 | np = inet6_sk(sk); | |
3389 | overhead += sizeof(struct ipv6hdr); | |
3390 | if (np) | |
3391 | optv6 = rcu_dereference_protected(np->opt, | |
614d79c0 | 3392 | sock_owned_by_user(sk)); |
113c3075 P |
3393 | if (optv6) |
3394 | overhead += (optv6->opt_flen + optv6->opt_nflen); | |
3395 | return overhead; | |
3396 | #endif /* IS_ENABLED(CONFIG_IPV6) */ | |
3397 | default: /* Returns 0 overhead if the socket is not ipv4 or ipv6 */ | |
3398 | return overhead; | |
3399 | } | |
3400 | } | |
3401 | EXPORT_SYMBOL(kernel_sock_ip_overhead); |