blob: 088fb3fd45e00f3fa5d55e3e374c8751e60d225b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Jesper Juhl02c30a82005-05-05 16:16:16 -07007 * Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * 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)
Stephen Hemminger89bddce2006-09-01 00:19:31 -070045 * Tigran Aivazian : Made listen(2) backlog sanity checks
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 * 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
Stephen Hemminger89bddce2006-09-01 00:19:31 -070056 * paradigm.
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 *
58 * Based upon Swansea University Computer Society NET3.039
59 */
60
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include <linux/socket.h>
63#include <linux/file.h>
64#include <linux/net.h>
65#include <linux/interrupt.h>
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -070066#include <linux/thread_info.h>
Stephen Hemminger55737fd2006-09-01 00:23:39 -070067#include <linux/rcupdate.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070068#include <linux/netdevice.h>
69#include <linux/proc_fs.h>
70#include <linux/seq_file.h>
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -080071#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070072#include <linux/wanrouter.h>
73#include <linux/if_bridge.h>
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030074#include <linux/if_frad.h>
75#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070076#include <linux/init.h>
77#include <linux/poll.h>
78#include <linux/cache.h>
79#include <linux/module.h>
80#include <linux/highmem.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070081#include <linux/mount.h>
82#include <linux/security.h>
83#include <linux/syscalls.h>
84#include <linux/compat.h>
85#include <linux/kmod.h>
David Woodhouse3ec3b2f2005-05-17 12:08:48 +010086#include <linux/audit.h>
Adrian Bunkd86b5e02006-01-21 00:46:55 +010087#include <linux/wireless.h>
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -070088#include <linux/nsproxy.h>
Nick Black1fd73172009-09-22 16:43:33 -070089#include <linux/magic.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090090#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92#include <asm/uaccess.h>
93#include <asm/unistd.h>
94
95#include <net/compat.h>
David S. Miller87de87d2008-06-03 09:14:03 -070096#include <net/wext.h>
Herbert Xuf8451722010-05-24 00:12:34 -070097#include <net/cls_cgroup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99#include <net/sock.h>
100#include <linux/netfilter.h>
101
Arnd Bergmann6b960182009-11-06 23:10:54 -0800102#include <linux/if_tun.h>
103#include <linux/ipv6_route.h>
104#include <linux/route.h>
Arnd Bergmann6b960182009-11-06 23:10:54 -0800105#include <linux/sockios.h>
106#include <linux/atalk.h>
107
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
Badari Pulavarty027445c2006-09-30 23:28:46 -0700109static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
110 unsigned long nr_segs, loff_t pos);
111static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
112 unsigned long nr_segs, loff_t pos);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700113static int sock_mmap(struct file *file, struct vm_area_struct *vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
115static int sock_close(struct inode *inode, struct file *file);
116static unsigned int sock_poll(struct file *file,
117 struct poll_table_struct *wait);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700118static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800119#ifdef CONFIG_COMPAT
120static long compat_sock_ioctl(struct file *file,
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700121 unsigned int cmd, unsigned long arg);
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800122#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123static int sock_fasync(int fd, struct file *filp, int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124static ssize_t sock_sendpage(struct file *file, struct page *page,
125 int offset, size_t size, loff_t *ppos, int more);
Jens Axboe9c55e012007-11-06 23:30:13 -0800126static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700127 struct pipe_inode_info *pipe, size_t len,
Jens Axboe9c55e012007-11-06 23:30:13 -0800128 unsigned int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130/*
131 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
132 * in the operation structures but are done directly via the socketcall() multiplexor.
133 */
134
Arjan van de Venda7071d2007-02-12 00:55:36 -0800135static const struct file_operations socket_file_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 .owner = THIS_MODULE,
137 .llseek = no_llseek,
138 .aio_read = sock_aio_read,
139 .aio_write = sock_aio_write,
140 .poll = sock_poll,
141 .unlocked_ioctl = sock_ioctl,
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800142#ifdef CONFIG_COMPAT
143 .compat_ioctl = compat_sock_ioctl,
144#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 .mmap = sock_mmap,
146 .open = sock_no_open, /* special open code to disallow open via /proc */
147 .release = sock_close,
148 .fasync = sock_fasync,
Jens Axboe5274f052006-03-30 15:15:30 +0200149 .sendpage = sock_sendpage,
150 .splice_write = generic_splice_sendpage,
Jens Axboe9c55e012007-11-06 23:30:13 -0800151 .splice_read = sock_splice_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152};
153
154/*
155 * The protocol list. Each protocol is registered in here.
156 */
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158static DEFINE_SPINLOCK(net_family_lock);
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -0700159static const struct net_proto_family *net_families[NPROTO] __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161/*
162 * Statistics counters of the socket lists
163 */
164
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700165static DEFINE_PER_CPU(int, sockets_in_use);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700168 * Support routines.
169 * Move socket addresses back and forth across the kernel/user
170 * divide and look after the messy bits.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 */
172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173/**
174 * move_addr_to_kernel - copy a socket address into kernel space
175 * @uaddr: Address in user space
176 * @kaddr: Address in kernel space
177 * @ulen: Length in user space
178 *
179 * The address is copied into kernel space. If the provided address is
180 * too long an error code of -EINVAL is returned. If the copy gives
181 * invalid addresses -EFAULT is returned. On a success 0 is returned.
182 */
183
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -0700184int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185{
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -0700186 if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700188 if (ulen == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 return 0;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700190 if (copy_from_user(kaddr, uaddr, ulen))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 return -EFAULT;
David Woodhouse3ec3b2f2005-05-17 12:08:48 +0100192 return audit_sockaddr(ulen, kaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193}
194
195/**
196 * move_addr_to_user - copy an address to user space
197 * @kaddr: kernel space address
198 * @klen: length of address in kernel
199 * @uaddr: user space address
200 * @ulen: pointer to user length field
201 *
202 * The value pointed to by ulen on entry is the buffer length available.
203 * This is overwritten with the buffer space used. -EINVAL is returned
204 * if an overlong buffer is specified or a negative buffer size. -EFAULT
205 * is returned if either the buffer or the length field are not
206 * accessible.
207 * After copying the data up to the limit the user specifies, the true
208 * length of the data is written over the length limit the user
209 * specified. Zero is returned for a success.
210 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700211
stephen hemminger11165f12010-10-18 14:27:29 +0000212static int move_addr_to_user(struct sockaddr *kaddr, int klen,
213 void __user *uaddr, int __user *ulen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214{
215 int err;
216 int len;
217
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700218 err = get_user(len, ulen);
219 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 return err;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700221 if (len > klen)
222 len = klen;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -0700223 if (len < 0 || len > sizeof(struct sockaddr_storage))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700225 if (len) {
Steve Grubbd6fe3942006-03-30 12:20:22 -0500226 if (audit_sockaddr(klen, kaddr))
227 return -ENOMEM;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700228 if (copy_to_user(uaddr, kaddr, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 return -EFAULT;
230 }
231 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700232 * "fromlen shall refer to the value before truncation.."
233 * 1003.1g
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 */
235 return __put_user(klen, ulen);
236}
237
Christoph Lametere18b8902006-12-06 20:33:20 -0800238static struct kmem_cache *sock_inode_cachep __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
240static struct inode *sock_alloc_inode(struct super_block *sb)
241{
242 struct socket_alloc *ei;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700243
Christoph Lametere94b1762006-12-06 20:33:17 -0800244 ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 if (!ei)
246 return NULL;
Eric Dumazet43815482010-04-29 11:01:49 +0000247 ei->socket.wq = kmalloc(sizeof(struct socket_wq), GFP_KERNEL);
248 if (!ei->socket.wq) {
249 kmem_cache_free(sock_inode_cachep, ei);
250 return NULL;
251 }
252 init_waitqueue_head(&ei->socket.wq->wait);
253 ei->socket.wq->fasync_list = NULL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 ei->socket.state = SS_UNCONNECTED;
256 ei->socket.flags = 0;
257 ei->socket.ops = NULL;
258 ei->socket.sk = NULL;
259 ei->socket.file = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
261 return &ei->vfs_inode;
262}
263
Eric Dumazet43815482010-04-29 11:01:49 +0000264
265static void wq_free_rcu(struct rcu_head *head)
266{
267 struct socket_wq *wq = container_of(head, struct socket_wq, rcu);
268
269 kfree(wq);
270}
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272static void sock_destroy_inode(struct inode *inode)
273{
Eric Dumazet43815482010-04-29 11:01:49 +0000274 struct socket_alloc *ei;
275
276 ei = container_of(inode, struct socket_alloc, vfs_inode);
277 call_rcu(&ei->socket.wq->rcu, wq_free_rcu);
278 kmem_cache_free(sock_inode_cachep, ei);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279}
280
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700281static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282{
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700283 struct socket_alloc *ei = (struct socket_alloc *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
Christoph Lametera35afb82007-05-16 22:10:57 -0700285 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286}
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700287
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288static int init_inodecache(void)
289{
290 sock_inode_cachep = kmem_cache_create("sock_inode_cache",
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700291 sizeof(struct socket_alloc),
292 0,
293 (SLAB_HWCACHE_ALIGN |
294 SLAB_RECLAIM_ACCOUNT |
295 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900296 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 if (sock_inode_cachep == NULL)
298 return -ENOMEM;
299 return 0;
300}
301
Alexey Dobriyanb87221d2009-09-21 17:01:09 -0700302static const struct super_operations sockfs_ops = {
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700303 .alloc_inode = sock_alloc_inode,
304 .destroy_inode = sock_destroy_inode,
305 .statfs = simple_statfs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306};
307
Al Viro51139ad2010-07-25 23:47:46 +0400308static struct dentry *sockfs_mount(struct file_system_type *fs_type,
309 int flags, const char *dev_name, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310{
Al Viro51139ad2010-07-25 23:47:46 +0400311 return mount_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312}
313
Eric Dumazetba899662005-08-26 12:05:31 -0700314static struct vfsmount *sock_mnt __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315
316static struct file_system_type sock_fs_type = {
317 .name = "sockfs",
Al Viro51139ad2010-07-25 23:47:46 +0400318 .mount = sockfs_mount,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 .kill_sb = kill_anon_super,
320};
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700321
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700322/*
323 * sockfs_dname() is called from d_path().
324 */
325static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen)
326{
327 return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]",
328 dentry->d_inode->i_ino);
329}
330
Al Viro3ba13d12009-02-20 06:02:22 +0000331static const struct dentry_operations sockfs_dentry_operations = {
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700332 .d_dname = sockfs_dname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333};
334
335/*
336 * Obtains the first available file descriptor and sets it up for use.
337 *
David S. Miller39d8c1b2006-03-20 17:13:49 -0800338 * These functions create file structures and maps them to fd space
339 * of the current process. On success it returns file descriptor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 * and file struct implicitly stored in sock->file.
341 * Note that another thread may close file descriptor before we return
342 * from this function. We use the fact that now we do not refer
343 * to socket after mapping. If one day we will need it, this
344 * function will increment ref. count on file by 1.
345 *
346 * In any case returned fd MAY BE not valid!
347 * This race condition is unavoidable
348 * with shared fd spaces, we cannot solve it inside kernel,
349 * but we take care of internal coherence yet.
350 */
351
Al Viro7cbe66b2009-08-05 19:59:08 +0400352static int sock_alloc_file(struct socket *sock, struct file **f, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353{
Al Viro7cbe66b2009-08-05 19:59:08 +0400354 struct qstr name = { .name = "" };
Al Viro2c48b9c2009-08-09 00:52:35 +0400355 struct path path;
Al Viro7cbe66b2009-08-05 19:59:08 +0400356 struct file *file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 int fd;
David S. Miller39d8c1b2006-03-20 17:13:49 -0800358
Ulrich Dreppera677a032008-07-23 21:29:17 -0700359 fd = get_unused_fd_flags(flags);
Al Viro7cbe66b2009-08-05 19:59:08 +0400360 if (unlikely(fd < 0))
361 return fd;
David S. Miller39d8c1b2006-03-20 17:13:49 -0800362
Al Viro2c48b9c2009-08-09 00:52:35 +0400363 path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name);
364 if (unlikely(!path.dentry)) {
Al Viro7cbe66b2009-08-05 19:59:08 +0400365 put_unused_fd(fd);
David S. Miller39d8c1b2006-03-20 17:13:49 -0800366 return -ENOMEM;
Al Viro7cbe66b2009-08-05 19:59:08 +0400367 }
Al Viro2c48b9c2009-08-09 00:52:35 +0400368 path.mnt = mntget(sock_mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
Al Viro2c48b9c2009-08-09 00:52:35 +0400370 path.dentry->d_op = &sockfs_dentry_operations;
Al Viro2c48b9c2009-08-09 00:52:35 +0400371 d_instantiate(path.dentry, SOCK_INODE(sock));
Al Virocc3808f2009-08-06 09:43:59 +0400372 SOCK_INODE(sock)->i_fop = &socket_file_ops;
373
Al Viro2c48b9c2009-08-09 00:52:35 +0400374 file = alloc_file(&path, FMODE_READ | FMODE_WRITE,
Al Virocc3808f2009-08-06 09:43:59 +0400375 &socket_file_ops);
376 if (unlikely(!file)) {
377 /* drop dentry, keep inode */
Al Viro7de9c6e2010-10-23 11:11:40 -0400378 ihold(path.dentry->d_inode);
Al Viro2c48b9c2009-08-09 00:52:35 +0400379 path_put(&path);
Al Virocc3808f2009-08-06 09:43:59 +0400380 put_unused_fd(fd);
381 return -ENFILE;
382 }
David S. Miller39d8c1b2006-03-20 17:13:49 -0800383
384 sock->file = file;
Ulrich Drepper77d27202008-07-23 21:29:35 -0700385 file->f_flags = O_RDWR | (flags & O_NONBLOCK);
David S. Miller39d8c1b2006-03-20 17:13:49 -0800386 file->f_pos = 0;
387 file->private_data = sock;
388
Al Viro7cbe66b2009-08-05 19:59:08 +0400389 *f = file;
390 return fd;
David S. Miller39d8c1b2006-03-20 17:13:49 -0800391}
392
Ulrich Dreppera677a032008-07-23 21:29:17 -0700393int sock_map_fd(struct socket *sock, int flags)
David S. Miller39d8c1b2006-03-20 17:13:49 -0800394{
395 struct file *newfile;
Al Viro7cbe66b2009-08-05 19:59:08 +0400396 int fd = sock_alloc_file(sock, &newfile, flags);
David S. Miller39d8c1b2006-03-20 17:13:49 -0800397
Al Viro7cbe66b2009-08-05 19:59:08 +0400398 if (likely(fd >= 0))
David S. Miller39d8c1b2006-03-20 17:13:49 -0800399 fd_install(fd, newfile);
Al Viro7cbe66b2009-08-05 19:59:08 +0400400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 return fd;
402}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700403EXPORT_SYMBOL(sock_map_fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800405static struct socket *sock_from_file(struct file *file, int *err)
406{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800407 if (file->f_op == &socket_file_ops)
408 return file->private_data; /* set in sock_map_fd */
409
Eric Dumazet23bb80d2007-02-08 14:59:57 -0800410 *err = -ENOTSOCK;
411 return NULL;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800412}
413
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414/**
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700415 * sockfd_lookup - Go from a file number to its socket slot
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 * @fd: file handle
417 * @err: pointer to an error code return
418 *
419 * The file handle passed in is locked and the socket it is bound
420 * too is returned. If an error occurs the err pointer is overwritten
421 * with a negative errno code and NULL is returned. The function checks
422 * for both invalid handles and passing a handle which is not a socket.
423 *
424 * On a success the socket object pointer is returned.
425 */
426
427struct socket *sockfd_lookup(int fd, int *err)
428{
429 struct file *file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 struct socket *sock;
431
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700432 file = fget(fd);
433 if (!file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 *err = -EBADF;
435 return NULL;
436 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700437
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800438 sock = sock_from_file(file, err);
439 if (!sock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 fput(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 return sock;
442}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700443EXPORT_SYMBOL(sockfd_lookup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800445static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
446{
447 struct file *file;
448 struct socket *sock;
449
Hua Zhong36725582006-04-19 15:25:02 -0700450 *err = -EBADF;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800451 file = fget_light(fd, fput_needed);
452 if (file) {
453 sock = sock_from_file(file, err);
454 if (sock)
455 return sock;
456 fput_light(file, *fput_needed);
457 }
458 return NULL;
459}
460
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461/**
462 * sock_alloc - allocate a socket
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700463 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 * Allocate a new inode and socket object. The two are bound together
465 * and initialised. The socket is then returned. If we are out of inodes
466 * NULL is returned.
467 */
468
469static struct socket *sock_alloc(void)
470{
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700471 struct inode *inode;
472 struct socket *sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
474 inode = new_inode(sock_mnt->mnt_sb);
475 if (!inode)
476 return NULL;
477
478 sock = SOCKET_I(inode);
479
Eric Dumazet29a020d2009-09-15 02:39:20 -0700480 kmemcheck_annotate_bitfield(sock, type);
Christoph Hellwig85fe4022010-10-23 11:19:54 -0400481 inode->i_ino = get_next_ino();
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700482 inode->i_mode = S_IFSOCK | S_IRWXUGO;
David Howells8192b0c2008-11-14 10:39:10 +1100483 inode->i_uid = current_fsuid();
484 inode->i_gid = current_fsgid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
Eric Dumazet4e694892009-04-04 16:41:09 -0700486 percpu_add(sockets_in_use, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 return sock;
488}
489
490/*
491 * In theory you can't get an open on this inode, but /proc provides
492 * a back door. Remember to keep it shut otherwise you'll let the
493 * creepy crawlies in.
494 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
497{
498 return -ENXIO;
499}
500
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800501const struct file_operations bad_sock_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 .owner = THIS_MODULE,
503 .open = sock_no_open,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200504 .llseek = noop_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505};
506
507/**
508 * sock_release - close a socket
509 * @sock: socket to close
510 *
511 * The socket is released from the protocol stack if it has a release
512 * callback, and the inode is then released if the socket is bound to
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700513 * an inode not a file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700515
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516void sock_release(struct socket *sock)
517{
518 if (sock->ops) {
519 struct module *owner = sock->ops->owner;
520
521 sock->ops->release(sock);
522 sock->ops = NULL;
523 module_put(owner);
524 }
525
Eric Dumazet43815482010-04-29 11:01:49 +0000526 if (sock->wq->fasync_list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 printk(KERN_ERR "sock_release: fasync list not empty!\n");
528
Eric Dumazet4e694892009-04-04 16:41:09 -0700529 percpu_sub(sockets_in_use, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 if (!sock->file) {
531 iput(SOCK_INODE(sock));
532 return;
533 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700534 sock->file = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700536EXPORT_SYMBOL(sock_release);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537
Oliver Hartkopp2244d072010-08-17 08:59:14 +0000538int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags)
Patrick Ohly20d49472009-02-12 05:03:38 +0000539{
Oliver Hartkopp2244d072010-08-17 08:59:14 +0000540 *tx_flags = 0;
Patrick Ohly20d49472009-02-12 05:03:38 +0000541 if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE))
Oliver Hartkopp2244d072010-08-17 08:59:14 +0000542 *tx_flags |= SKBTX_HW_TSTAMP;
Patrick Ohly20d49472009-02-12 05:03:38 +0000543 if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE))
Oliver Hartkopp2244d072010-08-17 08:59:14 +0000544 *tx_flags |= SKBTX_SW_TSTAMP;
Patrick Ohly20d49472009-02-12 05:03:38 +0000545 return 0;
546}
547EXPORT_SYMBOL(sock_tx_timestamp);
548
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700549static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 struct msghdr *msg, size_t size)
551{
552 struct sock_iocb *si = kiocb_to_siocb(iocb);
553 int err;
554
Herbert Xuf8451722010-05-24 00:12:34 -0700555 sock_update_classid(sock->sk);
556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 si->sock = sock;
558 si->scm = NULL;
559 si->msg = msg;
560 si->size = size;
561
562 err = security_socket_sendmsg(sock, msg, size);
563 if (err)
564 return err;
565
566 return sock->ops->sendmsg(iocb, sock, msg, size);
567}
568
569int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
570{
571 struct kiocb iocb;
572 struct sock_iocb siocb;
573 int ret;
574
575 init_sync_kiocb(&iocb, NULL);
576 iocb.private = &siocb;
577 ret = __sock_sendmsg(&iocb, sock, msg, size);
578 if (-EIOCBQUEUED == ret)
579 ret = wait_on_sync_kiocb(&iocb);
580 return ret;
581}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700582EXPORT_SYMBOL(sock_sendmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
584int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
585 struct kvec *vec, size_t num, size_t size)
586{
587 mm_segment_t oldfs = get_fs();
588 int result;
589
590 set_fs(KERNEL_DS);
591 /*
592 * the following is safe, since for compiler definitions of kvec and
593 * iovec are identical, yielding the same in-core layout and alignment
594 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700595 msg->msg_iov = (struct iovec *)vec;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 msg->msg_iovlen = num;
597 result = sock_sendmsg(sock, msg, size);
598 set_fs(oldfs);
599 return result;
600}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700601EXPORT_SYMBOL(kernel_sendmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
Patrick Ohly20d49472009-02-12 05:03:38 +0000603static int ktime2ts(ktime_t kt, struct timespec *ts)
604{
605 if (kt.tv64) {
606 *ts = ktime_to_timespec(kt);
607 return 1;
608 } else {
609 return 0;
610 }
611}
612
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700613/*
614 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
615 */
616void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
617 struct sk_buff *skb)
618{
Patrick Ohly20d49472009-02-12 05:03:38 +0000619 int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP);
620 struct timespec ts[3];
621 int empty = 1;
622 struct skb_shared_hwtstamps *shhwtstamps =
623 skb_hwtstamps(skb);
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700624
Patrick Ohly20d49472009-02-12 05:03:38 +0000625 /* Race occurred between timestamp enabling and packet
626 receiving. Fill in the current time for now. */
627 if (need_software_tstamp && skb->tstamp.tv64 == 0)
628 __net_timestamp(skb);
629
630 if (need_software_tstamp) {
631 if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
632 struct timeval tv;
633 skb_get_timestamp(skb, &tv);
634 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
635 sizeof(tv), &tv);
636 } else {
Hagen Paul Pfeifer842509b2010-04-06 05:39:52 +0000637 skb_get_timestampns(skb, &ts[0]);
Patrick Ohly20d49472009-02-12 05:03:38 +0000638 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS,
Hagen Paul Pfeifer842509b2010-04-06 05:39:52 +0000639 sizeof(ts[0]), &ts[0]);
Patrick Ohly20d49472009-02-12 05:03:38 +0000640 }
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700641 }
Patrick Ohly20d49472009-02-12 05:03:38 +0000642
643
644 memset(ts, 0, sizeof(ts));
645 if (skb->tstamp.tv64 &&
646 sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) {
647 skb_get_timestampns(skb, ts + 0);
648 empty = 0;
649 }
650 if (shhwtstamps) {
651 if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) &&
652 ktime2ts(shhwtstamps->syststamp, ts + 1))
653 empty = 0;
654 if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) &&
655 ktime2ts(shhwtstamps->hwtstamp, ts + 2))
656 empty = 0;
657 }
658 if (!empty)
659 put_cmsg(msg, SOL_SOCKET,
660 SCM_TIMESTAMPING, sizeof(ts), &ts);
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700661}
Arnaldo Carvalho de Melo7c81fd82007-03-10 00:39:35 -0300662EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
663
stephen hemminger11165f12010-10-18 14:27:29 +0000664static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk,
665 struct sk_buff *skb)
Neil Horman3b885782009-10-12 13:26:31 -0700666{
667 if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount)
668 put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL,
669 sizeof(__u32), &skb->dropcount);
670}
671
Eric Dumazet767dd032010-04-28 19:14:43 +0000672void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
Neil Horman3b885782009-10-12 13:26:31 -0700673 struct sk_buff *skb)
674{
675 sock_recv_timestamp(msg, sk, skb);
676 sock_recv_drops(msg, sk, skb);
677}
Eric Dumazet767dd032010-04-28 19:14:43 +0000678EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
Neil Horman3b885782009-10-12 13:26:31 -0700679
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700680static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock,
681 struct msghdr *msg, size_t size, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683 struct sock_iocb *si = kiocb_to_siocb(iocb);
684
Herbert Xuf8451722010-05-24 00:12:34 -0700685 sock_update_classid(sock->sk);
686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 si->sock = sock;
688 si->scm = NULL;
689 si->msg = msg;
690 si->size = size;
691 si->flags = flags;
692
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 return sock->ops->recvmsg(iocb, sock, msg, size, flags);
694}
695
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700696static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
697 struct msghdr *msg, size_t size, int flags)
698{
699 int err = security_socket_recvmsg(sock, msg, size, flags);
700
701 return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags);
702}
703
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700704int sock_recvmsg(struct socket *sock, struct msghdr *msg,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 size_t size, int flags)
706{
707 struct kiocb iocb;
708 struct sock_iocb siocb;
709 int ret;
710
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700711 init_sync_kiocb(&iocb, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 iocb.private = &siocb;
713 ret = __sock_recvmsg(&iocb, sock, msg, size, flags);
714 if (-EIOCBQUEUED == ret)
715 ret = wait_on_sync_kiocb(&iocb);
716 return ret;
717}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700718EXPORT_SYMBOL(sock_recvmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700720static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
721 size_t size, int flags)
722{
723 struct kiocb iocb;
724 struct sock_iocb siocb;
725 int ret;
726
727 init_sync_kiocb(&iocb, NULL);
728 iocb.private = &siocb;
729 ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags);
730 if (-EIOCBQUEUED == ret)
731 ret = wait_on_sync_kiocb(&iocb);
732 return ret;
733}
734
Martin Lucinac1249c02010-12-10 00:04:05 +0000735/**
736 * kernel_recvmsg - Receive a message from a socket (kernel space)
737 * @sock: The socket to receive the message from
738 * @msg: Received message
739 * @vec: Input s/g array for message data
740 * @num: Size of input s/g array
741 * @size: Number of bytes to read
742 * @flags: Message flags (MSG_DONTWAIT, etc...)
743 *
744 * On return the msg structure contains the scatter/gather array passed in the
745 * vec argument. The array is modified so that it consists of the unfilled
746 * portion of the original array.
747 *
748 * The returned value is the total number of bytes received, or an error.
749 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700750int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
751 struct kvec *vec, size_t num, size_t size, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752{
753 mm_segment_t oldfs = get_fs();
754 int result;
755
756 set_fs(KERNEL_DS);
757 /*
758 * the following is safe, since for compiler definitions of kvec and
759 * iovec are identical, yielding the same in-core layout and alignment
760 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700761 msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 result = sock_recvmsg(sock, msg, size, flags);
763 set_fs(oldfs);
764 return result;
765}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700766EXPORT_SYMBOL(kernel_recvmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767
768static void sock_aio_dtor(struct kiocb *iocb)
769{
770 kfree(iocb->private);
771}
772
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300773static ssize_t sock_sendpage(struct file *file, struct page *page,
774 int offset, size_t size, loff_t *ppos, int more)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775{
776 struct socket *sock;
777 int flags;
778
Eric Dumazetb69aee02005-09-06 14:42:45 -0700779 sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780
781 flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
782 if (more)
783 flags |= MSG_MORE;
784
Linus Torvaldse6949582009-08-13 08:28:36 -0700785 return kernel_sendpage(sock, page, offset, size, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786}
787
Jens Axboe9c55e012007-11-06 23:30:13 -0800788static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700789 struct pipe_inode_info *pipe, size_t len,
Jens Axboe9c55e012007-11-06 23:30:13 -0800790 unsigned int flags)
791{
792 struct socket *sock = file->private_data;
793
Rémi Denis-Courmont997b37d2008-02-15 02:35:45 -0800794 if (unlikely(!sock->ops->splice_read))
795 return -EINVAL;
796
Herbert Xuf8451722010-05-24 00:12:34 -0700797 sock_update_classid(sock->sk);
798
Jens Axboe9c55e012007-11-06 23:30:13 -0800799 return sock->ops->splice_read(sock, ppos, pipe, len, flags);
800}
801
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800802static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700803 struct sock_iocb *siocb)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800804{
805 if (!is_sync_kiocb(iocb)) {
806 siocb = kmalloc(sizeof(*siocb), GFP_KERNEL);
807 if (!siocb)
808 return NULL;
809 iocb->ki_dtor = sock_aio_dtor;
810 }
811
812 siocb->kiocb = iocb;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800813 iocb->private = siocb;
814 return siocb;
815}
816
817static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb,
Badari Pulavarty027445c2006-09-30 23:28:46 -0700818 struct file *file, const struct iovec *iov,
819 unsigned long nr_segs)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800820{
821 struct socket *sock = file->private_data;
822 size_t size = 0;
823 int i;
824
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700825 for (i = 0; i < nr_segs; i++)
826 size += iov[i].iov_len;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800827
828 msg->msg_name = NULL;
829 msg->msg_namelen = 0;
830 msg->msg_control = NULL;
831 msg->msg_controllen = 0;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700832 msg->msg_iov = (struct iovec *)iov;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800833 msg->msg_iovlen = nr_segs;
834 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
835
836 return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags);
837}
838
Badari Pulavarty027445c2006-09-30 23:28:46 -0700839static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
840 unsigned long nr_segs, loff_t pos)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800841{
842 struct sock_iocb siocb, *x;
843
844 if (pos != 0)
845 return -ESPIPE;
Badari Pulavarty027445c2006-09-30 23:28:46 -0700846
847 if (iocb->ki_left == 0) /* Match SYS5 behaviour */
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800848 return 0;
849
Badari Pulavarty027445c2006-09-30 23:28:46 -0700850
851 x = alloc_sock_iocb(iocb, &siocb);
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800852 if (!x)
853 return -ENOMEM;
Badari Pulavarty027445c2006-09-30 23:28:46 -0700854 return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800855}
856
857static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb,
Badari Pulavarty027445c2006-09-30 23:28:46 -0700858 struct file *file, const struct iovec *iov,
859 unsigned long nr_segs)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800860{
861 struct socket *sock = file->private_data;
862 size_t size = 0;
863 int i;
864
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700865 for (i = 0; i < nr_segs; i++)
866 size += iov[i].iov_len;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800867
868 msg->msg_name = NULL;
869 msg->msg_namelen = 0;
870 msg->msg_control = NULL;
871 msg->msg_controllen = 0;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700872 msg->msg_iov = (struct iovec *)iov;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800873 msg->msg_iovlen = nr_segs;
874 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
875 if (sock->type == SOCK_SEQPACKET)
876 msg->msg_flags |= MSG_EOR;
877
878 return __sock_sendmsg(iocb, sock, msg, size);
879}
880
Badari Pulavarty027445c2006-09-30 23:28:46 -0700881static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
882 unsigned long nr_segs, loff_t pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883{
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800884 struct sock_iocb siocb, *x;
885
886 if (pos != 0)
887 return -ESPIPE;
Badari Pulavarty027445c2006-09-30 23:28:46 -0700888
Badari Pulavarty027445c2006-09-30 23:28:46 -0700889 x = alloc_sock_iocb(iocb, &siocb);
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800890 if (!x)
891 return -ENOMEM;
892
Badari Pulavarty027445c2006-09-30 23:28:46 -0700893 return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894}
895
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896/*
897 * Atomic setting of ioctl hooks to avoid race
898 * with module unload.
899 */
900
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800901static DEFINE_MUTEX(br_ioctl_mutex);
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700902static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903
Eric W. Biederman881d9662007-09-17 11:56:21 -0700904void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800906 mutex_lock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 br_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800908 mutex_unlock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909}
910EXPORT_SYMBOL(brioctl_set);
911
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800912static DEFINE_MUTEX(vlan_ioctl_mutex);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700913static int (*vlan_ioctl_hook) (struct net *, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914
Eric W. Biederman881d9662007-09-17 11:56:21 -0700915void vlan_ioctl_set(int (*hook) (struct net *, void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800917 mutex_lock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 vlan_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800919 mutex_unlock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920}
921EXPORT_SYMBOL(vlan_ioctl_set);
922
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800923static DEFINE_MUTEX(dlci_ioctl_mutex);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700924static int (*dlci_ioctl_hook) (unsigned int, void __user *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700926void dlci_ioctl_set(int (*hook) (unsigned int, void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800928 mutex_lock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 dlci_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800930 mutex_unlock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931}
932EXPORT_SYMBOL(dlci_ioctl_set);
933
Arnd Bergmann6b960182009-11-06 23:10:54 -0800934static long sock_do_ioctl(struct net *net, struct socket *sock,
935 unsigned int cmd, unsigned long arg)
936{
937 int err;
938 void __user *argp = (void __user *)arg;
939
940 err = sock->ops->ioctl(sock, cmd, arg);
941
942 /*
943 * If this ioctl is unknown try to hand it down
944 * to the NIC driver.
945 */
946 if (err == -ENOIOCTLCMD)
947 err = dev_ioctl(net, cmd, argp);
948
949 return err;
950}
951
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952/*
953 * With an ioctl, arg may well be a user mode pointer, but we don't know
954 * what to do with it - that's up to the protocol still.
955 */
956
957static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
958{
959 struct socket *sock;
Eric W. Biederman881d9662007-09-17 11:56:21 -0700960 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700961 void __user *argp = (void __user *)arg;
962 int pid, err;
Eric W. Biederman881d9662007-09-17 11:56:21 -0700963 struct net *net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964
Eric Dumazetb69aee02005-09-06 14:42:45 -0700965 sock = file->private_data;
Eric W. Biederman881d9662007-09-17 11:56:21 -0700966 sk = sock->sk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900967 net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
Eric W. Biederman881d9662007-09-17 11:56:21 -0700969 err = dev_ioctl(net, cmd, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970 } else
Johannes Berg3d23e342009-09-29 23:27:28 +0200971#ifdef CONFIG_WEXT_CORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700972 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
Eric W. Biederman881d9662007-09-17 11:56:21 -0700973 err = dev_ioctl(net, cmd, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974 } else
Johannes Berg3d23e342009-09-29 23:27:28 +0200975#endif
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700976 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 case FIOSETOWN:
978 case SIOCSPGRP:
979 err = -EFAULT;
980 if (get_user(pid, (int __user *)argp))
981 break;
982 err = f_setown(sock->file, pid, 1);
983 break;
984 case FIOGETOWN:
985 case SIOCGPGRP:
Eric W. Biederman609d7fa2006-10-02 02:17:15 -0700986 err = put_user(f_getown(sock->file),
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700987 (int __user *)argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 break;
989 case SIOCGIFBR:
990 case SIOCSIFBR:
991 case SIOCBRADDBR:
992 case SIOCBRDELBR:
993 err = -ENOPKG;
994 if (!br_ioctl_hook)
995 request_module("bridge");
996
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800997 mutex_lock(&br_ioctl_mutex);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700998 if (br_ioctl_hook)
Eric W. Biederman881d9662007-09-17 11:56:21 -0700999 err = br_ioctl_hook(net, cmd, argp);
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -08001000 mutex_unlock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 break;
1002 case SIOCGIFVLAN:
1003 case SIOCSIFVLAN:
1004 err = -ENOPKG;
1005 if (!vlan_ioctl_hook)
1006 request_module("8021q");
1007
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -08001008 mutex_lock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009 if (vlan_ioctl_hook)
Eric W. Biederman881d9662007-09-17 11:56:21 -07001010 err = vlan_ioctl_hook(net, argp);
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -08001011 mutex_unlock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 case SIOCADDDLCI:
1014 case SIOCDELDLCI:
1015 err = -ENOPKG;
1016 if (!dlci_ioctl_hook)
1017 request_module("dlci");
1018
Pavel Emelyanov7512cbf2008-03-21 15:58:52 -07001019 mutex_lock(&dlci_ioctl_mutex);
1020 if (dlci_ioctl_hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 err = dlci_ioctl_hook(cmd, argp);
Pavel Emelyanov7512cbf2008-03-21 15:58:52 -07001022 mutex_unlock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023 break;
1024 default:
Arnd Bergmann6b960182009-11-06 23:10:54 -08001025 err = sock_do_ioctl(net, sock, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 break;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001027 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 return err;
1029}
1030
1031int sock_create_lite(int family, int type, int protocol, struct socket **res)
1032{
1033 int err;
1034 struct socket *sock = NULL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001035
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 err = security_socket_create(family, type, protocol, 1);
1037 if (err)
1038 goto out;
1039
1040 sock = sock_alloc();
1041 if (!sock) {
1042 err = -ENOMEM;
1043 goto out;
1044 }
1045
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 sock->type = type;
Venkat Yekkirala7420ed22006-08-04 23:17:57 -07001047 err = security_socket_post_create(sock, family, type, protocol, 1);
1048 if (err)
1049 goto out_release;
1050
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051out:
1052 *res = sock;
1053 return err;
Venkat Yekkirala7420ed22006-08-04 23:17:57 -07001054out_release:
1055 sock_release(sock);
1056 sock = NULL;
1057 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001059EXPORT_SYMBOL(sock_create_lite);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060
1061/* No kernel lock held - perfect */
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001062static unsigned int sock_poll(struct file *file, poll_table *wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063{
1064 struct socket *sock;
1065
1066 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001067 * We can't return errors to poll, so it's either yes or no.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 */
Eric Dumazetb69aee02005-09-06 14:42:45 -07001069 sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 return sock->ops->poll(file, sock, wait);
1071}
1072
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001073static int sock_mmap(struct file *file, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074{
Eric Dumazetb69aee02005-09-06 14:42:45 -07001075 struct socket *sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076
1077 return sock->ops->mmap(file, sock, vma);
1078}
1079
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001080static int sock_close(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081{
1082 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001083 * It was possible the inode is NULL we were
1084 * closing an unfinished socket.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 */
1086
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001087 if (!inode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 printk(KERN_DEBUG "sock_close: NULL inode\n");
1089 return 0;
1090 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 sock_release(SOCKET_I(inode));
1092 return 0;
1093}
1094
1095/*
1096 * Update the socket async list
1097 *
1098 * Fasync_list locking strategy.
1099 *
1100 * 1. fasync_list is modified only under process context socket lock
1101 * i.e. under semaphore.
1102 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
Eric Dumazet989a2972010-04-14 09:55:35 +00001103 * or under socket lock
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104 */
1105
1106static int sock_fasync(int fd, struct file *filp, int on)
1107{
Eric Dumazet989a2972010-04-14 09:55:35 +00001108 struct socket *sock = filp->private_data;
1109 struct sock *sk = sock->sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
Eric Dumazet989a2972010-04-14 09:55:35 +00001111 if (sk == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113
1114 lock_sock(sk);
1115
Eric Dumazet43815482010-04-29 11:01:49 +00001116 fasync_helper(fd, filp, on, &sock->wq->fasync_list);
Eric Dumazet989a2972010-04-14 09:55:35 +00001117
Eric Dumazet43815482010-04-29 11:01:49 +00001118 if (!sock->wq->fasync_list)
Eric Dumazet989a2972010-04-14 09:55:35 +00001119 sock_reset_flag(sk, SOCK_FASYNC);
Jonathan Corbet76398422009-02-01 14:26:59 -07001120 else
Eric Dumazetbcdce712009-10-06 17:28:29 -07001121 sock_set_flag(sk, SOCK_FASYNC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001122
Eric Dumazet989a2972010-04-14 09:55:35 +00001123 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 return 0;
1125}
1126
Eric Dumazet43815482010-04-29 11:01:49 +00001127/* This function may be called only under socket lock or callback_lock or rcu_lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128
1129int sock_wake_async(struct socket *sock, int how, int band)
1130{
Eric Dumazet43815482010-04-29 11:01:49 +00001131 struct socket_wq *wq;
1132
1133 if (!sock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 return -1;
Eric Dumazet43815482010-04-29 11:01:49 +00001135 rcu_read_lock();
1136 wq = rcu_dereference(sock->wq);
1137 if (!wq || !wq->fasync_list) {
1138 rcu_read_unlock();
1139 return -1;
1140 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001141 switch (how) {
Pavel Emelyanov8d8ad9d2007-11-26 20:10:50 +08001142 case SOCK_WAKE_WAITD:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
1144 break;
1145 goto call_kill;
Pavel Emelyanov8d8ad9d2007-11-26 20:10:50 +08001146 case SOCK_WAKE_SPACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
1148 break;
1149 /* fall through */
Pavel Emelyanov8d8ad9d2007-11-26 20:10:50 +08001150 case SOCK_WAKE_IO:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001151call_kill:
Eric Dumazet43815482010-04-29 11:01:49 +00001152 kill_fasync(&wq->fasync_list, SIGIO, band);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 break;
Pavel Emelyanov8d8ad9d2007-11-26 20:10:50 +08001154 case SOCK_WAKE_URG:
Eric Dumazet43815482010-04-29 11:01:49 +00001155 kill_fasync(&wq->fasync_list, SIGURG, band);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 }
Eric Dumazet43815482010-04-29 11:01:49 +00001157 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158 return 0;
1159}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001160EXPORT_SYMBOL(sock_wake_async);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001161
Pavel Emelyanov721db932010-09-29 16:06:32 +04001162int __sock_create(struct net *net, int family, int type, int protocol,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001163 struct socket **res, int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164{
1165 int err;
1166 struct socket *sock;
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001167 const struct net_proto_family *pf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168
1169 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001170 * Check protocol is in range
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 */
1172 if (family < 0 || family >= NPROTO)
1173 return -EAFNOSUPPORT;
1174 if (type < 0 || type >= SOCK_MAX)
1175 return -EINVAL;
1176
1177 /* Compatibility.
1178
1179 This uglymoron is moved from INET layer to here to avoid
1180 deadlock in module load.
1181 */
1182 if (family == PF_INET && type == SOCK_PACKET) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001183 static int warned;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 if (!warned) {
1185 warned = 1;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001186 printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1187 current->comm);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 }
1189 family = PF_PACKET;
1190 }
1191
1192 err = security_socket_create(family, type, protocol, kern);
1193 if (err)
1194 return err;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001195
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001196 /*
1197 * Allocate the socket and allow the family to set things up. if
1198 * the protocol is 0, the family is instructed to select an appropriate
1199 * default.
1200 */
1201 sock = sock_alloc();
1202 if (!sock) {
1203 if (net_ratelimit())
1204 printk(KERN_WARNING "socket: no more sockets\n");
1205 return -ENFILE; /* Not exactly a match, but its the
1206 closest posix thing */
1207 }
1208
1209 sock->type = type;
1210
Johannes Berg95a5afc2008-10-16 15:24:51 -07001211#ifdef CONFIG_MODULES
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001212 /* Attempt to load a protocol module if the find failed.
1213 *
1214 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 * requested real, full-featured networking support upon configuration.
1216 * Otherwise module support will break!
1217 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001218 if (net_families[family] == NULL)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001219 request_module("net-pf-%d", family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220#endif
1221
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001222 rcu_read_lock();
1223 pf = rcu_dereference(net_families[family]);
1224 err = -EAFNOSUPPORT;
1225 if (!pf)
1226 goto out_release;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001227
1228 /*
1229 * We will call the ->create function, that possibly is in a loadable
1230 * module, so we have to bump that loadable module refcnt first.
1231 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001232 if (!try_module_get(pf->owner))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001233 goto out_release;
1234
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001235 /* Now protected by module ref count */
1236 rcu_read_unlock();
1237
Eric Paris3f378b62009-11-05 22:18:14 -08001238 err = pf->create(net, sock, protocol, kern);
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001239 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 goto out_module_put;
Frank Filza79af592005-09-27 15:23:38 -07001241
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 /*
1243 * Now to bump the refcnt of the [loadable] module that owns this
1244 * socket at sock_release time we decrement its refcnt.
1245 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001246 if (!try_module_get(sock->ops->owner))
1247 goto out_module_busy;
1248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 /*
1250 * Now that we're done with the ->create function, the [loadable]
1251 * module can have its refcnt decremented
1252 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001253 module_put(pf->owner);
Venkat Yekkirala7420ed22006-08-04 23:17:57 -07001254 err = security_socket_post_create(sock, family, type, protocol, kern);
1255 if (err)
Herbert Xu3b185522007-08-15 14:46:02 -07001256 goto out_sock_release;
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001257 *res = sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001259 return 0;
1260
1261out_module_busy:
1262 err = -EAFNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001263out_module_put:
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001264 sock->ops = NULL;
1265 module_put(pf->owner);
1266out_sock_release:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267 sock_release(sock);
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001268 return err;
1269
1270out_release:
1271 rcu_read_unlock();
1272 goto out_sock_release;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001273}
Pavel Emelyanov721db932010-09-29 16:06:32 +04001274EXPORT_SYMBOL(__sock_create);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
1276int sock_create(int family, int type, int protocol, struct socket **res)
1277{
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -07001278 return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001280EXPORT_SYMBOL(sock_create);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281
1282int sock_create_kern(int family, int type, int protocol, struct socket **res)
1283{
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -07001284 return __sock_create(&init_net, family, type, protocol, res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001286EXPORT_SYMBOL(sock_create_kern);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001288SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289{
1290 int retval;
1291 struct socket *sock;
Ulrich Dreppera677a032008-07-23 21:29:17 -07001292 int flags;
1293
Ulrich Dreppere38b36f2008-07-23 21:29:42 -07001294 /* Check the SOCK_* constants for consistency. */
1295 BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC);
1296 BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK);
1297 BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK);
1298 BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK);
1299
Ulrich Dreppera677a032008-07-23 21:29:17 -07001300 flags = type & ~SOCK_TYPE_MASK;
Ulrich Drepper77d27202008-07-23 21:29:35 -07001301 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
Ulrich Dreppera677a032008-07-23 21:29:17 -07001302 return -EINVAL;
1303 type &= SOCK_TYPE_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001305 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1306 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1307
Linus Torvalds1da177e2005-04-16 15:20:36 -07001308 retval = sock_create(family, type, protocol, &sock);
1309 if (retval < 0)
1310 goto out;
1311
Ulrich Drepper77d27202008-07-23 21:29:35 -07001312 retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 if (retval < 0)
1314 goto out_release;
1315
1316out:
1317 /* It may be already another descriptor 8) Not kernel problem. */
1318 return retval;
1319
1320out_release:
1321 sock_release(sock);
1322 return retval;
1323}
1324
1325/*
1326 * Create a pair of connected sockets.
1327 */
1328
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001329SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
1330 int __user *, usockvec)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331{
1332 struct socket *sock1, *sock2;
1333 int fd1, fd2, err;
Al Virodb349502007-02-07 01:48:00 -05001334 struct file *newfile1, *newfile2;
Ulrich Dreppera677a032008-07-23 21:29:17 -07001335 int flags;
1336
1337 flags = type & ~SOCK_TYPE_MASK;
Ulrich Drepper77d27202008-07-23 21:29:35 -07001338 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
Ulrich Dreppera677a032008-07-23 21:29:17 -07001339 return -EINVAL;
1340 type &= SOCK_TYPE_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001342 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1343 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1344
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 /*
1346 * Obtain the first socket and check if the underlying protocol
1347 * supports the socketpair call.
1348 */
1349
1350 err = sock_create(family, type, protocol, &sock1);
1351 if (err < 0)
1352 goto out;
1353
1354 err = sock_create(family, type, protocol, &sock2);
1355 if (err < 0)
1356 goto out_release_1;
1357
1358 err = sock1->ops->socketpair(sock1, sock2);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001359 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 goto out_release_both;
1361
Al Viro7cbe66b2009-08-05 19:59:08 +04001362 fd1 = sock_alloc_file(sock1, &newfile1, flags);
David S. Millerbf3c23d2007-10-29 21:54:02 -07001363 if (unlikely(fd1 < 0)) {
1364 err = fd1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 goto out_release_both;
David S. Millerbf3c23d2007-10-29 21:54:02 -07001366 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001367
Al Viro7cbe66b2009-08-05 19:59:08 +04001368 fd2 = sock_alloc_file(sock2, &newfile2, flags);
Al Viro198de4d2009-08-05 19:29:23 +04001369 if (unlikely(fd2 < 0)) {
1370 err = fd2;
1371 fput(newfile1);
1372 put_unused_fd(fd1);
1373 sock_release(sock2);
1374 goto out;
Al Virodb349502007-02-07 01:48:00 -05001375 }
1376
Al Viro157cf642008-12-14 04:57:47 -05001377 audit_fd_pair(fd1, fd2);
Al Virodb349502007-02-07 01:48:00 -05001378 fd_install(fd1, newfile1);
1379 fd_install(fd2, newfile2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 /* fd1 and fd2 may be already another descriptors.
1381 * Not kernel problem.
1382 */
1383
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001384 err = put_user(fd1, &usockvec[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385 if (!err)
1386 err = put_user(fd2, &usockvec[1]);
1387 if (!err)
1388 return 0;
1389
1390 sys_close(fd2);
1391 sys_close(fd1);
1392 return err;
1393
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394out_release_both:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001395 sock_release(sock2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001396out_release_1:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001397 sock_release(sock1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398out:
1399 return err;
1400}
1401
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402/*
1403 * Bind a name to a socket. Nothing much to do here since it's
1404 * the protocol's responsibility to handle the local address.
1405 *
1406 * We move the socket address to kernel space before we call
1407 * the protocol layer (having also checked the address is ok).
1408 */
1409
Heiko Carstens20f37032009-01-14 14:14:23 +01001410SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411{
1412 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001413 struct sockaddr_storage address;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001414 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001416 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Stephen Hemmingere71a4782007-04-10 20:10:33 -07001417 if (sock) {
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001418 err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001419 if (err >= 0) {
1420 err = security_socket_bind(sock,
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001421 (struct sockaddr *)&address,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001422 addrlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001423 if (!err)
1424 err = sock->ops->bind(sock,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001425 (struct sockaddr *)
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001426 &address, addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001427 }
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001428 fput_light(sock->file, fput_needed);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001429 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 return err;
1431}
1432
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433/*
1434 * Perform a listen. Basically, we allow the protocol to do anything
1435 * necessary for a listen, and if that works, we mark the socket as
1436 * ready for listening.
1437 */
1438
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001439SYSCALL_DEFINE2(listen, int, fd, int, backlog)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001440{
1441 struct socket *sock;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001442 int err, fput_needed;
Pavel Emelyanovb8e1f9b2007-12-08 00:12:33 -08001443 int somaxconn;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001444
1445 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1446 if (sock) {
Pavel Emelyanov8efa6e92008-03-31 19:41:14 -07001447 somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn;
Pavel Emelyanovb8e1f9b2007-12-08 00:12:33 -08001448 if ((unsigned)backlog > somaxconn)
1449 backlog = somaxconn;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001450
1451 err = security_socket_listen(sock, backlog);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001452 if (!err)
1453 err = sock->ops->listen(sock, backlog);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001454
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001455 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001456 }
1457 return err;
1458}
1459
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460/*
1461 * For accept, we attempt to create a new socket, set up the link
1462 * with the client, wake up the client, then return the new
1463 * connected fd. We collect the address of the connector in kernel
1464 * space and move it to user at the very end. This is unclean because
1465 * we open the socket then return an error.
1466 *
1467 * 1003.1g adds the ability to recvmsg() to query connection pending
1468 * status to recvmsg. We need to add that support in a way thats
1469 * clean when we restucture accept also.
1470 */
1471
Heiko Carstens20f37032009-01-14 14:14:23 +01001472SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
1473 int __user *, upeer_addrlen, int, flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001474{
1475 struct socket *sock, *newsock;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001476 struct file *newfile;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001477 int err, len, newfd, fput_needed;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001478 struct sockaddr_storage address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001479
Ulrich Drepper77d27202008-07-23 21:29:35 -07001480 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001481 return -EINVAL;
1482
1483 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1484 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1485
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001486 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001487 if (!sock)
1488 goto out;
1489
1490 err = -ENFILE;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001491 newsock = sock_alloc();
1492 if (!newsock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 goto out_put;
1494
1495 newsock->type = sock->type;
1496 newsock->ops = sock->ops;
1497
Linus Torvalds1da177e2005-04-16 15:20:36 -07001498 /*
1499 * We don't need try_module_get here, as the listening socket (sock)
1500 * has the protocol module (sock->ops->owner) held.
1501 */
1502 __module_get(newsock->ops->owner);
1503
Al Viro7cbe66b2009-08-05 19:59:08 +04001504 newfd = sock_alloc_file(newsock, &newfile, flags);
David S. Miller39d8c1b2006-03-20 17:13:49 -08001505 if (unlikely(newfd < 0)) {
1506 err = newfd;
David S. Miller9a1875e2006-04-01 12:48:36 -08001507 sock_release(newsock);
1508 goto out_put;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001509 }
1510
Frank Filza79af592005-09-27 15:23:38 -07001511 err = security_socket_accept(sock, newsock);
1512 if (err)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001513 goto out_fd;
Frank Filza79af592005-09-27 15:23:38 -07001514
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 err = sock->ops->accept(sock, newsock, sock->file->f_flags);
1516 if (err < 0)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001517 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518
1519 if (upeer_sockaddr) {
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001520 if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001521 &len, 2) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 err = -ECONNABORTED;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001523 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524 }
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001525 err = move_addr_to_user((struct sockaddr *)&address,
1526 len, upeer_sockaddr, upeer_addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001527 if (err < 0)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001528 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529 }
1530
1531 /* File flags are not inherited via accept() unlike another OSes. */
1532
David S. Miller39d8c1b2006-03-20 17:13:49 -08001533 fd_install(newfd, newfile);
1534 err = newfd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001537 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538out:
1539 return err;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001540out_fd:
David S. Miller9606a212006-04-01 01:00:14 -08001541 fput(newfile);
David S. Miller39d8c1b2006-03-20 17:13:49 -08001542 put_unused_fd(newfd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 goto out_put;
1544}
1545
Heiko Carstens20f37032009-01-14 14:14:23 +01001546SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr,
1547 int __user *, upeer_addrlen)
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001548{
Ulrich Drepperde11def2008-11-19 15:36:14 -08001549 return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0);
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001550}
1551
Linus Torvalds1da177e2005-04-16 15:20:36 -07001552/*
1553 * Attempt to connect to a socket with the server address. The address
1554 * is in user space so we verify it is OK and move it to kernel space.
1555 *
1556 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1557 * break bindings
1558 *
1559 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1560 * other SEQPACKET protocols that take time to connect() as it doesn't
1561 * include the -EINPROGRESS status for such sockets.
1562 */
1563
Heiko Carstens20f37032009-01-14 14:14:23 +01001564SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
1565 int, addrlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566{
1567 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001568 struct sockaddr_storage address;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001569 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001571 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001572 if (!sock)
1573 goto out;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001574 err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001575 if (err < 0)
1576 goto out_put;
1577
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001578 err =
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001579 security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001580 if (err)
1581 goto out_put;
1582
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001583 err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584 sock->file->f_flags);
1585out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001586 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587out:
1588 return err;
1589}
1590
1591/*
1592 * Get the local address ('name') of a socket object. Move the obtained
1593 * name to user space.
1594 */
1595
Heiko Carstens20f37032009-01-14 14:14:23 +01001596SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
1597 int __user *, usockaddr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598{
1599 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001600 struct sockaddr_storage address;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001601 int len, err, fput_needed;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001602
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001603 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001604 if (!sock)
1605 goto out;
1606
1607 err = security_socket_getsockname(sock);
1608 if (err)
1609 goto out_put;
1610
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001611 err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612 if (err)
1613 goto out_put;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001614 err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615
1616out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001617 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001618out:
1619 return err;
1620}
1621
1622/*
1623 * Get the remote address ('name') of a socket object. Move the obtained
1624 * name to user space.
1625 */
1626
Heiko Carstens20f37032009-01-14 14:14:23 +01001627SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr,
1628 int __user *, usockaddr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629{
1630 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001631 struct sockaddr_storage address;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001632 int len, err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001633
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001634 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1635 if (sock != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001636 err = security_socket_getpeername(sock);
1637 if (err) {
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001638 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 return err;
1640 }
1641
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001642 err =
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001643 sock->ops->getname(sock, (struct sockaddr *)&address, &len,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001644 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 if (!err)
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001646 err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001647 usockaddr_len);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001648 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 }
1650 return err;
1651}
1652
1653/*
1654 * Send a datagram to a given address. We move the address into kernel
1655 * space and check the user space data area is readable before invoking
1656 * the protocol.
1657 */
1658
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001659SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
1660 unsigned, flags, struct sockaddr __user *, addr,
1661 int, addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662{
1663 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001664 struct sockaddr_storage address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001665 int err;
1666 struct msghdr msg;
1667 struct iovec iov;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001668 int fput_needed;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001669
Linus Torvalds253eacc2010-10-30 16:43:10 -07001670 if (len > INT_MAX)
1671 len = INT_MAX;
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001672 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1673 if (!sock)
David S. Miller4387ff72007-02-08 15:06:08 -08001674 goto out;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001675
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001676 iov.iov_base = buff;
1677 iov.iov_len = len;
1678 msg.msg_name = NULL;
1679 msg.msg_iov = &iov;
1680 msg.msg_iovlen = 1;
1681 msg.msg_control = NULL;
1682 msg.msg_controllen = 0;
1683 msg.msg_namelen = 0;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001684 if (addr) {
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001685 err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001686 if (err < 0)
1687 goto out_put;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001688 msg.msg_name = (struct sockaddr *)&address;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001689 msg.msg_namelen = addr_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690 }
1691 if (sock->file->f_flags & O_NONBLOCK)
1692 flags |= MSG_DONTWAIT;
1693 msg.msg_flags = flags;
1694 err = sock_sendmsg(sock, &msg, len);
1695
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001696out_put:
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001697 fput_light(sock->file, fput_needed);
David S. Miller4387ff72007-02-08 15:06:08 -08001698out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001699 return err;
1700}
1701
1702/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001703 * Send a datagram down a socket.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704 */
1705
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001706SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len,
1707 unsigned, flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708{
1709 return sys_sendto(fd, buff, len, flags, NULL, 0);
1710}
1711
1712/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001713 * Receive a frame from the socket and optionally record the address of the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 * sender. We verify the buffers are writable and if needed move the
1715 * sender address from kernel to user space.
1716 */
1717
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001718SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
1719 unsigned, flags, struct sockaddr __user *, addr,
1720 int __user *, addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721{
1722 struct socket *sock;
1723 struct iovec iov;
1724 struct msghdr msg;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001725 struct sockaddr_storage address;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001726 int err, err2;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001727 int fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001728
Linus Torvalds253eacc2010-10-30 16:43:10 -07001729 if (size > INT_MAX)
1730 size = INT_MAX;
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001731 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001732 if (!sock)
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001733 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001734
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001735 msg.msg_control = NULL;
1736 msg.msg_controllen = 0;
1737 msg.msg_iovlen = 1;
1738 msg.msg_iov = &iov;
1739 iov.iov_len = size;
1740 iov.iov_base = ubuf;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001741 msg.msg_name = (struct sockaddr *)&address;
1742 msg.msg_namelen = sizeof(address);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001743 if (sock->file->f_flags & O_NONBLOCK)
1744 flags |= MSG_DONTWAIT;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001745 err = sock_recvmsg(sock, &msg, size, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001747 if (err >= 0 && addr != NULL) {
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001748 err2 = move_addr_to_user((struct sockaddr *)&address,
1749 msg.msg_namelen, addr, addr_len);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001750 if (err2 < 0)
1751 err = err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001752 }
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001753
1754 fput_light(sock->file, fput_needed);
David S. Miller4387ff72007-02-08 15:06:08 -08001755out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 return err;
1757}
1758
1759/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001760 * Receive a datagram from a socket.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 */
1762
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001763asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size,
1764 unsigned flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001765{
1766 return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
1767}
1768
1769/*
1770 * Set a socket option. Because we don't know the option lengths we have
1771 * to pass the user mode parameter for the protocols to sort out.
1772 */
1773
Heiko Carstens20f37032009-01-14 14:14:23 +01001774SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
1775 char __user *, optval, int, optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001776{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001777 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778 struct socket *sock;
1779
1780 if (optlen < 0)
1781 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001782
1783 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1784 if (sock != NULL) {
1785 err = security_socket_setsockopt(sock, level, optname);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001786 if (err)
1787 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001788
1789 if (level == SOL_SOCKET)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001790 err =
1791 sock_setsockopt(sock, level, optname, optval,
1792 optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 else
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001794 err =
1795 sock->ops->setsockopt(sock, level, optname, optval,
1796 optlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001797out_put:
1798 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799 }
1800 return err;
1801}
1802
1803/*
1804 * Get a socket option. Because we don't know the option lengths we have
1805 * to pass a user mode parameter for the protocols to sort out.
1806 */
1807
Heiko Carstens20f37032009-01-14 14:14:23 +01001808SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
1809 char __user *, optval, int __user *, optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001811 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001812 struct socket *sock;
1813
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001814 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1815 if (sock != NULL) {
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001816 err = security_socket_getsockopt(sock, level, optname);
1817 if (err)
1818 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819
1820 if (level == SOL_SOCKET)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001821 err =
1822 sock_getsockopt(sock, level, optname, optval,
1823 optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001824 else
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001825 err =
1826 sock->ops->getsockopt(sock, level, optname, optval,
1827 optlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001828out_put:
1829 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001830 }
1831 return err;
1832}
1833
Linus Torvalds1da177e2005-04-16 15:20:36 -07001834/*
1835 * Shutdown a socket.
1836 */
1837
Heiko Carstens754fe8d2009-01-14 14:14:09 +01001838SYSCALL_DEFINE2(shutdown, int, fd, int, how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001840 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841 struct socket *sock;
1842
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001843 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1844 if (sock != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 err = security_socket_shutdown(sock, how);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001846 if (!err)
1847 err = sock->ops->shutdown(sock, how);
1848 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001849 }
1850 return err;
1851}
1852
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001853/* A couple of helpful macros for getting the address of the 32/64 bit
Linus Torvalds1da177e2005-04-16 15:20:36 -07001854 * fields which are the same type (int / unsigned) on our platforms.
1855 */
1856#define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1857#define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1858#define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1859
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860/*
1861 * BSD sendmsg interface
1862 */
1863
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001864SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001865{
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001866 struct compat_msghdr __user *msg_compat =
1867 (struct compat_msghdr __user *)msg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001869 struct sockaddr_storage address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001870 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
Alex Williamsonb9d717a2005-09-26 14:28:02 -07001871 unsigned char ctl[sizeof(struct cmsghdr) + 20]
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001872 __attribute__ ((aligned(sizeof(__kernel_size_t))));
1873 /* 20 is size of ipv6_pktinfo */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001874 unsigned char *ctl_buf = ctl;
1875 struct msghdr msg_sys;
1876 int err, ctl_len, iov_size, total_len;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001877 int fput_needed;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001878
Linus Torvalds1da177e2005-04-16 15:20:36 -07001879 err = -EFAULT;
1880 if (MSG_CMSG_COMPAT & flags) {
1881 if (get_compat_msghdr(&msg_sys, msg_compat))
1882 return -EFAULT;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001883 } else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884 return -EFAULT;
1885
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001886 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001887 if (!sock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001888 goto out;
1889
1890 /* do not move before msg_sys is valid */
1891 err = -EMSGSIZE;
1892 if (msg_sys.msg_iovlen > UIO_MAXIOV)
1893 goto out_put;
1894
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001895 /* Check whether to allocate the iovec area */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896 err = -ENOMEM;
1897 iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
1898 if (msg_sys.msg_iovlen > UIO_FASTIOV) {
1899 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
1900 if (!iov)
1901 goto out_put;
1902 }
1903
1904 /* This will also move the address data into kernel space */
1905 if (MSG_CMSG_COMPAT & flags) {
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001906 err = verify_compat_iovec(&msg_sys, iov,
1907 (struct sockaddr *)&address,
1908 VERIFY_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 } else
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001910 err = verify_iovec(&msg_sys, iov,
1911 (struct sockaddr *)&address,
1912 VERIFY_READ);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001913 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001914 goto out_freeiov;
1915 total_len = err;
1916
1917 err = -ENOBUFS;
1918
1919 if (msg_sys.msg_controllen > INT_MAX)
1920 goto out_freeiov;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001921 ctl_len = msg_sys.msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001922 if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001923 err =
1924 cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl,
1925 sizeof(ctl));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926 if (err)
1927 goto out_freeiov;
1928 ctl_buf = msg_sys.msg_control;
Al Viro8920e8f2005-09-07 18:28:51 -07001929 ctl_len = msg_sys.msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001930 } else if (ctl_len) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001931 if (ctl_len > sizeof(ctl)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001933 if (ctl_buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 goto out_freeiov;
1935 }
1936 err = -EFAULT;
1937 /*
1938 * Careful! Before this, msg_sys.msg_control contains a user pointer.
1939 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
1940 * checking falls down on this.
1941 */
Namhyung Kimfb8621b2010-09-07 03:55:00 +00001942 if (copy_from_user(ctl_buf,
1943 (void __user __force *)msg_sys.msg_control,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001944 ctl_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001945 goto out_freectl;
1946 msg_sys.msg_control = ctl_buf;
1947 }
1948 msg_sys.msg_flags = flags;
1949
1950 if (sock->file->f_flags & O_NONBLOCK)
1951 msg_sys.msg_flags |= MSG_DONTWAIT;
1952 err = sock_sendmsg(sock, &msg_sys, total_len);
1953
1954out_freectl:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001955 if (ctl_buf != ctl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001956 sock_kfree_s(sock->sk, ctl_buf, ctl_len);
1957out_freeiov:
1958 if (iov != iovstack)
1959 sock_kfree_s(sock->sk, iov, iov_size);
1960out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001961 fput_light(sock->file, fput_needed);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001962out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963 return err;
1964}
1965
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07001966static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
1967 struct msghdr *msg_sys, unsigned flags, int nosec)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968{
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001969 struct compat_msghdr __user *msg_compat =
1970 (struct compat_msghdr __user *)msg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001971 struct iovec iovstack[UIO_FASTIOV];
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001972 struct iovec *iov = iovstack;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 unsigned long cmsg_ptr;
1974 int err, iov_size, total_len, len;
1975
1976 /* kernel mode address */
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001977 struct sockaddr_storage addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001978
1979 /* user mode address pointers */
1980 struct sockaddr __user *uaddr;
1981 int __user *uaddr_len;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001982
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983 if (MSG_CMSG_COMPAT & flags) {
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07001984 if (get_compat_msghdr(msg_sys, msg_compat))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001985 return -EFAULT;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001986 } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr)))
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001987 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001988
Linus Torvalds1da177e2005-04-16 15:20:36 -07001989 err = -EMSGSIZE;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07001990 if (msg_sys->msg_iovlen > UIO_MAXIOV)
1991 goto out;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001992
1993 /* Check whether to allocate the iovec area */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001994 err = -ENOMEM;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07001995 iov_size = msg_sys->msg_iovlen * sizeof(struct iovec);
1996 if (msg_sys->msg_iovlen > UIO_FASTIOV) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
1998 if (!iov)
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07001999 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002000 }
2001
2002 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002003 * Save the user-mode address (verify_iovec will change the
2004 * kernel msghdr to use the kernel address space)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002005 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002006
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002007 uaddr = (__force void __user *)msg_sys->msg_name;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002008 uaddr_len = COMPAT_NAMELEN(msg);
2009 if (MSG_CMSG_COMPAT & flags) {
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002010 err = verify_compat_iovec(msg_sys, iov,
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07002011 (struct sockaddr *)&addr,
2012 VERIFY_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002013 } else
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002014 err = verify_iovec(msg_sys, iov,
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07002015 (struct sockaddr *)&addr,
2016 VERIFY_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002017 if (err < 0)
2018 goto out_freeiov;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002019 total_len = err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002020
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002021 cmsg_ptr = (unsigned long)msg_sys->msg_control;
2022 msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002023
Linus Torvalds1da177e2005-04-16 15:20:36 -07002024 if (sock->file->f_flags & O_NONBLOCK)
2025 flags |= MSG_DONTWAIT;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002026 err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
2027 total_len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002028 if (err < 0)
2029 goto out_freeiov;
2030 len = err;
2031
2032 if (uaddr != NULL) {
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07002033 err = move_addr_to_user((struct sockaddr *)&addr,
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002034 msg_sys->msg_namelen, uaddr,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002035 uaddr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002036 if (err < 0)
2037 goto out_freeiov;
2038 }
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002039 err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
David S. Miller37f7f422005-09-16 16:51:01 -07002040 COMPAT_FLAGS(msg));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002041 if (err)
2042 goto out_freeiov;
2043 if (MSG_CMSG_COMPAT & flags)
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002044 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002045 &msg_compat->msg_controllen);
2046 else
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002047 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002048 &msg->msg_controllen);
2049 if (err)
2050 goto out_freeiov;
2051 err = len;
2052
2053out_freeiov:
2054 if (iov != iovstack)
2055 sock_kfree_s(sock->sk, iov, iov_size);
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002056out:
2057 return err;
2058}
2059
2060/*
2061 * BSD recvmsg interface
2062 */
2063
2064SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
2065 unsigned int, flags)
2066{
2067 int fput_needed, err;
2068 struct msghdr msg_sys;
2069 struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed);
2070
2071 if (!sock)
2072 goto out;
2073
2074 err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0);
2075
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08002076 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002077out:
2078 return err;
2079}
2080
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002081/*
2082 * Linux recvmmsg interface
2083 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002085int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
2086 unsigned int flags, struct timespec *timeout)
2087{
2088 int fput_needed, err, datagrams;
2089 struct socket *sock;
2090 struct mmsghdr __user *entry;
Jean-Mickael Guerind7256d02009-12-01 08:47:26 +00002091 struct compat_mmsghdr __user *compat_entry;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002092 struct msghdr msg_sys;
2093 struct timespec end_time;
2094
2095 if (timeout &&
2096 poll_select_set_timeout(&end_time, timeout->tv_sec,
2097 timeout->tv_nsec))
2098 return -EINVAL;
2099
2100 datagrams = 0;
2101
2102 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2103 if (!sock)
2104 return err;
2105
2106 err = sock_error(sock->sk);
2107 if (err)
2108 goto out_put;
2109
2110 entry = mmsg;
Jean-Mickael Guerind7256d02009-12-01 08:47:26 +00002111 compat_entry = (struct compat_mmsghdr __user *)mmsg;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002112
2113 while (datagrams < vlen) {
2114 /*
2115 * No need to ask LSM for more than the first datagram.
2116 */
Jean-Mickael Guerind7256d02009-12-01 08:47:26 +00002117 if (MSG_CMSG_COMPAT & flags) {
2118 err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry,
2119 &msg_sys, flags, datagrams);
2120 if (err < 0)
2121 break;
2122 err = __put_user(err, &compat_entry->msg_len);
2123 ++compat_entry;
2124 } else {
2125 err = __sys_recvmsg(sock, (struct msghdr __user *)entry,
2126 &msg_sys, flags, datagrams);
2127 if (err < 0)
2128 break;
2129 err = put_user(err, &entry->msg_len);
2130 ++entry;
2131 }
2132
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002133 if (err)
2134 break;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002135 ++datagrams;
2136
Brandon L Black71c5c152010-03-26 16:18:03 +00002137 /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
2138 if (flags & MSG_WAITFORONE)
2139 flags |= MSG_DONTWAIT;
2140
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002141 if (timeout) {
2142 ktime_get_ts(timeout);
2143 *timeout = timespec_sub(end_time, *timeout);
2144 if (timeout->tv_sec < 0) {
2145 timeout->tv_sec = timeout->tv_nsec = 0;
2146 break;
2147 }
2148
2149 /* Timeout, return less than vlen datagrams */
2150 if (timeout->tv_nsec == 0 && timeout->tv_sec == 0)
2151 break;
2152 }
2153
2154 /* Out of band data, return right away */
2155 if (msg_sys.msg_flags & MSG_OOB)
2156 break;
2157 }
2158
2159out_put:
2160 fput_light(sock->file, fput_needed);
2161
2162 if (err == 0)
2163 return datagrams;
2164
2165 if (datagrams != 0) {
2166 /*
2167 * We may return less entries than requested (vlen) if the
2168 * sock is non block and there aren't enough datagrams...
2169 */
2170 if (err != -EAGAIN) {
2171 /*
2172 * ... or if recvmsg returns an error after we
2173 * received some datagrams, where we record the
2174 * error to return on the next call or if the
2175 * app asks about it using getsockopt(SO_ERROR).
2176 */
2177 sock->sk->sk_err = -err;
2178 }
2179
2180 return datagrams;
2181 }
2182
2183 return err;
2184}
2185
2186SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,
2187 unsigned int, vlen, unsigned int, flags,
2188 struct timespec __user *, timeout)
2189{
2190 int datagrams;
2191 struct timespec timeout_sys;
2192
2193 if (!timeout)
2194 return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL);
2195
2196 if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys)))
2197 return -EFAULT;
2198
2199 datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys);
2200
2201 if (datagrams > 0 &&
2202 copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys)))
2203 datagrams = -EFAULT;
2204
2205 return datagrams;
2206}
2207
2208#ifdef __ARCH_WANT_SYS_SOCKETCALL
Linus Torvalds1da177e2005-04-16 15:20:36 -07002209/* Argument list sizes for sys_socketcall */
2210#define AL(x) ((x) * sizeof(unsigned long))
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002211static const unsigned char nargs[20] = {
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002212 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
2213 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
2214 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
2215 AL(4), AL(5)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002216};
2217
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218#undef AL
2219
2220/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002221 * System call vectors.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222 *
2223 * Argument checking cleaned up. Saved 20% in size.
2224 * This function doesn't need to set the kernel lock because
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002225 * it is set by the callees.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002226 */
2227
Heiko Carstens3e0fa652009-01-14 14:14:24 +01002228SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229{
2230 unsigned long a[6];
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002231 unsigned long a0, a1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002232 int err;
Arjan van de Ven47379052009-09-28 12:57:44 -07002233 unsigned int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002235 if (call < 1 || call > SYS_RECVMMSG)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002236 return -EINVAL;
2237
Arjan van de Ven47379052009-09-28 12:57:44 -07002238 len = nargs[call];
2239 if (len > sizeof(a))
2240 return -EINVAL;
2241
Linus Torvalds1da177e2005-04-16 15:20:36 -07002242 /* copy_from_user should be SMP safe. */
Arjan van de Ven47379052009-09-28 12:57:44 -07002243 if (copy_from_user(a, args, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002244 return -EFAULT;
David Woodhouse3ec3b2f2005-05-17 12:08:48 +01002245
Al Virof3298dc2008-12-10 03:16:51 -05002246 audit_socketcall(nargs[call] / sizeof(unsigned long), a);
David Woodhouse3ec3b2f2005-05-17 12:08:48 +01002247
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002248 a0 = a[0];
2249 a1 = a[1];
2250
2251 switch (call) {
2252 case SYS_SOCKET:
2253 err = sys_socket(a0, a1, a[2]);
2254 break;
2255 case SYS_BIND:
2256 err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
2257 break;
2258 case SYS_CONNECT:
2259 err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]);
2260 break;
2261 case SYS_LISTEN:
2262 err = sys_listen(a0, a1);
2263 break;
2264 case SYS_ACCEPT:
Ulrich Drepperde11def2008-11-19 15:36:14 -08002265 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2266 (int __user *)a[2], 0);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002267 break;
2268 case SYS_GETSOCKNAME:
2269 err =
2270 sys_getsockname(a0, (struct sockaddr __user *)a1,
2271 (int __user *)a[2]);
2272 break;
2273 case SYS_GETPEERNAME:
2274 err =
2275 sys_getpeername(a0, (struct sockaddr __user *)a1,
2276 (int __user *)a[2]);
2277 break;
2278 case SYS_SOCKETPAIR:
2279 err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]);
2280 break;
2281 case SYS_SEND:
2282 err = sys_send(a0, (void __user *)a1, a[2], a[3]);
2283 break;
2284 case SYS_SENDTO:
2285 err = sys_sendto(a0, (void __user *)a1, a[2], a[3],
2286 (struct sockaddr __user *)a[4], a[5]);
2287 break;
2288 case SYS_RECV:
2289 err = sys_recv(a0, (void __user *)a1, a[2], a[3]);
2290 break;
2291 case SYS_RECVFROM:
2292 err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
2293 (struct sockaddr __user *)a[4],
2294 (int __user *)a[5]);
2295 break;
2296 case SYS_SHUTDOWN:
2297 err = sys_shutdown(a0, a1);
2298 break;
2299 case SYS_SETSOCKOPT:
2300 err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]);
2301 break;
2302 case SYS_GETSOCKOPT:
2303 err =
2304 sys_getsockopt(a0, a1, a[2], (char __user *)a[3],
2305 (int __user *)a[4]);
2306 break;
2307 case SYS_SENDMSG:
2308 err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]);
2309 break;
2310 case SYS_RECVMSG:
2311 err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]);
2312 break;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002313 case SYS_RECVMMSG:
2314 err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3],
2315 (struct timespec __user *)a[4]);
2316 break;
Ulrich Drepperde11def2008-11-19 15:36:14 -08002317 case SYS_ACCEPT4:
2318 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2319 (int __user *)a[2], a[3]);
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07002320 break;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002321 default:
2322 err = -EINVAL;
2323 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324 }
2325 return err;
2326}
2327
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002328#endif /* __ARCH_WANT_SYS_SOCKETCALL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002330/**
2331 * sock_register - add a socket protocol handler
2332 * @ops: description of protocol
2333 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334 * This function is called by a protocol handler that wants to
2335 * advertise its address family, and have it linked into the
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002336 * socket interface. The value ops->family coresponds to the
2337 * socket system call protocol family.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002338 */
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002339int sock_register(const struct net_proto_family *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002340{
2341 int err;
2342
2343 if (ops->family >= NPROTO) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002344 printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family,
2345 NPROTO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002346 return -ENOBUFS;
2347 }
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002348
2349 spin_lock(&net_family_lock);
2350 if (net_families[ops->family])
2351 err = -EEXIST;
2352 else {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002353 net_families[ops->family] = ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002354 err = 0;
2355 }
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002356 spin_unlock(&net_family_lock);
2357
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002358 printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002359 return err;
2360}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002361EXPORT_SYMBOL(sock_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002362
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002363/**
2364 * sock_unregister - remove a protocol handler
2365 * @family: protocol family to remove
2366 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367 * This function is called by a protocol handler that wants to
2368 * remove its address family, and have it unlinked from the
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002369 * new socket creation.
2370 *
2371 * If protocol handler is a module, then it can use module reference
2372 * counts to protect against new references. If protocol handler is not
2373 * a module then it needs to provide its own protection in
2374 * the ops->create routine.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002375 */
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002376void sock_unregister(int family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002377{
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002378 BUG_ON(family < 0 || family >= NPROTO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002380 spin_lock(&net_family_lock);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002381 net_families[family] = NULL;
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002382 spin_unlock(&net_family_lock);
2383
2384 synchronize_rcu();
2385
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002386 printk(KERN_INFO "NET: Unregistered protocol family %d\n", family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002387}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002388EXPORT_SYMBOL(sock_unregister);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389
Andi Kleen77d76ea2005-12-22 12:43:42 -08002390static int __init sock_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002391{
2392 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002393 * Initialize sock SLAB cache.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002394 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002395
Linus Torvalds1da177e2005-04-16 15:20:36 -07002396 sk_init();
2397
Linus Torvalds1da177e2005-04-16 15:20:36 -07002398 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002399 * Initialize skbuff SLAB cache
Linus Torvalds1da177e2005-04-16 15:20:36 -07002400 */
2401 skb_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402
2403 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002404 * Initialize the protocols module.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002405 */
2406
2407 init_inodecache();
2408 register_filesystem(&sock_fs_type);
2409 sock_mnt = kern_mount(&sock_fs_type);
Andi Kleen77d76ea2005-12-22 12:43:42 -08002410
2411 /* The real protocol initialization is performed in later initcalls.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002412 */
2413
2414#ifdef CONFIG_NETFILTER
2415 netfilter_init();
2416#endif
David S. Millercbeb3212005-12-22 12:58:55 -08002417
Richard Cochranc1f19b52010-07-17 08:49:36 +00002418#ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
2419 skb_timestamping_init();
2420#endif
2421
David S. Millercbeb3212005-12-22 12:58:55 -08002422 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002423}
2424
Andi Kleen77d76ea2005-12-22 12:43:42 -08002425core_initcall(sock_init); /* early initcall */
2426
Linus Torvalds1da177e2005-04-16 15:20:36 -07002427#ifdef CONFIG_PROC_FS
2428void socket_seq_show(struct seq_file *seq)
2429{
2430 int cpu;
2431 int counter = 0;
2432
KAMEZAWA Hiroyuki6f912042006-04-10 22:52:50 -07002433 for_each_possible_cpu(cpu)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002434 counter += per_cpu(sockets_in_use, cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435
2436 /* It can be negative, by the way. 8) */
2437 if (counter < 0)
2438 counter = 0;
2439
2440 seq_printf(seq, "sockets: used %d\n", counter);
2441}
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002442#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002443
Shaun Pereira89bbfc92006-03-21 23:58:08 -08002444#ifdef CONFIG_COMPAT
Arnd Bergmann6b960182009-11-06 23:10:54 -08002445static int do_siocgstamp(struct net *net, struct socket *sock,
2446 unsigned int cmd, struct compat_timeval __user *up)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002447{
Arnd Bergmann7a229382009-11-06 23:00:29 -08002448 mm_segment_t old_fs = get_fs();
2449 struct timeval ktv;
2450 int err;
2451
2452 set_fs(KERNEL_DS);
Arnd Bergmann6b960182009-11-06 23:10:54 -08002453 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002454 set_fs(old_fs);
2455 if (!err) {
2456 err = put_user(ktv.tv_sec, &up->tv_sec);
2457 err |= __put_user(ktv.tv_usec, &up->tv_usec);
2458 }
2459 return err;
2460}
2461
Arnd Bergmann6b960182009-11-06 23:10:54 -08002462static int do_siocgstampns(struct net *net, struct socket *sock,
2463 unsigned int cmd, struct compat_timespec __user *up)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002464{
Arnd Bergmann7a229382009-11-06 23:00:29 -08002465 mm_segment_t old_fs = get_fs();
2466 struct timespec kts;
2467 int err;
2468
2469 set_fs(KERNEL_DS);
Arnd Bergmann6b960182009-11-06 23:10:54 -08002470 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002471 set_fs(old_fs);
2472 if (!err) {
2473 err = put_user(kts.tv_sec, &up->tv_sec);
2474 err |= __put_user(kts.tv_nsec, &up->tv_nsec);
2475 }
2476 return err;
2477}
2478
Arnd Bergmann6b960182009-11-06 23:10:54 -08002479static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002480{
2481 struct ifreq __user *uifr;
2482 int err;
2483
2484 uifr = compat_alloc_user_space(sizeof(struct ifreq));
Arnd Bergmann6b960182009-11-06 23:10:54 -08002485 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002486 return -EFAULT;
2487
Arnd Bergmann6b960182009-11-06 23:10:54 -08002488 err = dev_ioctl(net, SIOCGIFNAME, uifr);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002489 if (err)
2490 return err;
2491
Arnd Bergmann6b960182009-11-06 23:10:54 -08002492 if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq)))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002493 return -EFAULT;
2494
2495 return 0;
2496}
2497
Arnd Bergmann6b960182009-11-06 23:10:54 -08002498static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002499{
Arnd Bergmann6b960182009-11-06 23:10:54 -08002500 struct compat_ifconf ifc32;
Arnd Bergmann7a229382009-11-06 23:00:29 -08002501 struct ifconf ifc;
2502 struct ifconf __user *uifc;
Arnd Bergmann6b960182009-11-06 23:10:54 -08002503 struct compat_ifreq __user *ifr32;
Arnd Bergmann7a229382009-11-06 23:00:29 -08002504 struct ifreq __user *ifr;
2505 unsigned int i, j;
2506 int err;
2507
Arnd Bergmann6b960182009-11-06 23:10:54 -08002508 if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002509 return -EFAULT;
2510
2511 if (ifc32.ifcbuf == 0) {
2512 ifc32.ifc_len = 0;
2513 ifc.ifc_len = 0;
2514 ifc.ifc_req = NULL;
2515 uifc = compat_alloc_user_space(sizeof(struct ifconf));
2516 } else {
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002517 size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) *
2518 sizeof(struct ifreq);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002519 uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
2520 ifc.ifc_len = len;
2521 ifr = ifc.ifc_req = (void __user *)(uifc + 1);
2522 ifr32 = compat_ptr(ifc32.ifcbuf);
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002523 for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) {
Arnd Bergmann6b960182009-11-06 23:10:54 -08002524 if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq)))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002525 return -EFAULT;
2526 ifr++;
2527 ifr32++;
2528 }
2529 }
2530 if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
2531 return -EFAULT;
2532
Arnd Bergmann6b960182009-11-06 23:10:54 -08002533 err = dev_ioctl(net, SIOCGIFCONF, uifc);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002534 if (err)
2535 return err;
2536
2537 if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
2538 return -EFAULT;
2539
2540 ifr = ifc.ifc_req;
2541 ifr32 = compat_ptr(ifc32.ifcbuf);
2542 for (i = 0, j = 0;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002543 i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len;
2544 i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) {
2545 if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq)))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002546 return -EFAULT;
2547 ifr32++;
2548 ifr++;
2549 }
2550
2551 if (ifc32.ifcbuf == 0) {
2552 /* Translate from 64-bit structure multiple to
2553 * a 32-bit one.
2554 */
2555 i = ifc.ifc_len;
Arnd Bergmann6b960182009-11-06 23:10:54 -08002556 i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq));
Arnd Bergmann7a229382009-11-06 23:00:29 -08002557 ifc32.ifc_len = i;
2558 } else {
2559 ifc32.ifc_len = i;
2560 }
Arnd Bergmann6b960182009-11-06 23:10:54 -08002561 if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002562 return -EFAULT;
2563
2564 return 0;
2565}
2566
Arnd Bergmann6b960182009-11-06 23:10:54 -08002567static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002568{
2569 struct ifreq __user *ifr;
Arnd Bergmann7a229382009-11-06 23:00:29 -08002570 u32 data;
2571 void __user *datap;
2572
2573 ifr = compat_alloc_user_space(sizeof(*ifr));
Arnd Bergmann7a229382009-11-06 23:00:29 -08002574
2575 if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2576 return -EFAULT;
2577
2578 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2579 return -EFAULT;
2580
2581 datap = compat_ptr(data);
2582 if (put_user(datap, &ifr->ifr_ifru.ifru_data))
2583 return -EFAULT;
2584
Arnd Bergmann6b960182009-11-06 23:10:54 -08002585 return dev_ioctl(net, SIOCETHTOOL, ifr);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002586}
2587
Arnd Bergmann7a50a242009-11-08 20:57:03 -08002588static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
2589{
2590 void __user *uptr;
2591 compat_uptr_t uptr32;
2592 struct ifreq __user *uifr;
2593
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002594 uifr = compat_alloc_user_space(sizeof(*uifr));
Arnd Bergmann7a50a242009-11-08 20:57:03 -08002595 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2596 return -EFAULT;
2597
2598 if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
2599 return -EFAULT;
2600
2601 uptr = compat_ptr(uptr32);
2602
2603 if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc))
2604 return -EFAULT;
2605
2606 return dev_ioctl(net, SIOCWANDEV, uifr);
2607}
2608
Arnd Bergmann6b960182009-11-06 23:10:54 -08002609static int bond_ioctl(struct net *net, unsigned int cmd,
2610 struct compat_ifreq __user *ifr32)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002611{
2612 struct ifreq kifr;
2613 struct ifreq __user *uifr;
Arnd Bergmann7a229382009-11-06 23:00:29 -08002614 mm_segment_t old_fs;
2615 int err;
2616 u32 data;
2617 void __user *datap;
2618
2619 switch (cmd) {
2620 case SIOCBONDENSLAVE:
2621 case SIOCBONDRELEASE:
2622 case SIOCBONDSETHWADDR:
2623 case SIOCBONDCHANGEACTIVE:
Arnd Bergmann6b960182009-11-06 23:10:54 -08002624 if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq)))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002625 return -EFAULT;
2626
2627 old_fs = get_fs();
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002628 set_fs(KERNEL_DS);
Arnd Bergmann6b960182009-11-06 23:10:54 -08002629 err = dev_ioctl(net, cmd, &kifr);
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002630 set_fs(old_fs);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002631
2632 return err;
2633 case SIOCBONDSLAVEINFOQUERY:
2634 case SIOCBONDINFOQUERY:
2635 uifr = compat_alloc_user_space(sizeof(*uifr));
2636 if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2637 return -EFAULT;
2638
2639 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2640 return -EFAULT;
2641
2642 datap = compat_ptr(data);
2643 if (put_user(datap, &uifr->ifr_ifru.ifru_data))
2644 return -EFAULT;
2645
Arnd Bergmann6b960182009-11-06 23:10:54 -08002646 return dev_ioctl(net, cmd, uifr);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002647 default:
2648 return -EINVAL;
Joe Perchesccbd6a52010-05-14 10:58:26 +00002649 }
Arnd Bergmann7a229382009-11-06 23:00:29 -08002650}
2651
Arnd Bergmann6b960182009-11-06 23:10:54 -08002652static int siocdevprivate_ioctl(struct net *net, unsigned int cmd,
2653 struct compat_ifreq __user *u_ifreq32)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002654{
2655 struct ifreq __user *u_ifreq64;
Arnd Bergmann7a229382009-11-06 23:00:29 -08002656 char tmp_buf[IFNAMSIZ];
2657 void __user *data64;
2658 u32 data32;
2659
2660 if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
2661 IFNAMSIZ))
2662 return -EFAULT;
2663 if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
2664 return -EFAULT;
2665 data64 = compat_ptr(data32);
2666
2667 u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
2668
2669 /* Don't check these user accesses, just let that get trapped
2670 * in the ioctl handler instead.
2671 */
2672 if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
2673 IFNAMSIZ))
2674 return -EFAULT;
2675 if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
2676 return -EFAULT;
2677
Arnd Bergmann6b960182009-11-06 23:10:54 -08002678 return dev_ioctl(net, cmd, u_ifreq64);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002679}
2680
Arnd Bergmann6b960182009-11-06 23:10:54 -08002681static int dev_ifsioc(struct net *net, struct socket *sock,
2682 unsigned int cmd, struct compat_ifreq __user *uifr32)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002683{
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002684 struct ifreq __user *uifr;
Arnd Bergmann7a229382009-11-06 23:00:29 -08002685 int err;
2686
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002687 uifr = compat_alloc_user_space(sizeof(*uifr));
2688 if (copy_in_user(uifr, uifr32, sizeof(*uifr32)))
2689 return -EFAULT;
2690
2691 err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr);
2692
Arnd Bergmann7a229382009-11-06 23:00:29 -08002693 if (!err) {
2694 switch (cmd) {
2695 case SIOCGIFFLAGS:
2696 case SIOCGIFMETRIC:
2697 case SIOCGIFMTU:
2698 case SIOCGIFMEM:
2699 case SIOCGIFHWADDR:
2700 case SIOCGIFINDEX:
2701 case SIOCGIFADDR:
2702 case SIOCGIFBRDADDR:
2703 case SIOCGIFDSTADDR:
2704 case SIOCGIFNETMASK:
Arnd Bergmannfab25322009-11-08 20:56:21 -08002705 case SIOCGIFPFLAGS:
Arnd Bergmann7a229382009-11-06 23:00:29 -08002706 case SIOCGIFTXQLEN:
Arnd Bergmannfab25322009-11-08 20:56:21 -08002707 case SIOCGMIIPHY:
2708 case SIOCGMIIREG:
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002709 if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002710 err = -EFAULT;
2711 break;
2712 }
2713 }
2714 return err;
2715}
2716
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002717static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
2718 struct compat_ifreq __user *uifr32)
2719{
2720 struct ifreq ifr;
2721 struct compat_ifmap __user *uifmap32;
2722 mm_segment_t old_fs;
2723 int err;
2724
2725 uifmap32 = &uifr32->ifr_ifru.ifru_map;
2726 err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name));
2727 err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2728 err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2729 err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2730 err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq);
2731 err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma);
2732 err |= __get_user(ifr.ifr_map.port, &uifmap32->port);
2733 if (err)
2734 return -EFAULT;
2735
2736 old_fs = get_fs();
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002737 set_fs(KERNEL_DS);
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002738 err = dev_ioctl(net, cmd, (void __user *)&ifr);
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002739 set_fs(old_fs);
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002740
2741 if (cmd == SIOCGIFMAP && !err) {
2742 err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
2743 err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2744 err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2745 err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2746 err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq);
2747 err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma);
2748 err |= __put_user(ifr.ifr_map.port, &uifmap32->port);
2749 if (err)
2750 err = -EFAULT;
2751 }
2752 return err;
2753}
2754
2755static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32)
2756{
2757 void __user *uptr;
2758 compat_uptr_t uptr32;
2759 struct ifreq __user *uifr;
2760
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002761 uifr = compat_alloc_user_space(sizeof(*uifr));
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002762 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2763 return -EFAULT;
2764
2765 if (get_user(uptr32, &uifr32->ifr_data))
2766 return -EFAULT;
2767
2768 uptr = compat_ptr(uptr32);
2769
2770 if (put_user(uptr, &uifr->ifr_data))
2771 return -EFAULT;
2772
2773 return dev_ioctl(net, SIOCSHWTSTAMP, uifr);
2774}
2775
Arnd Bergmann7a229382009-11-06 23:00:29 -08002776struct rtentry32 {
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002777 u32 rt_pad1;
Arnd Bergmann7a229382009-11-06 23:00:29 -08002778 struct sockaddr rt_dst; /* target address */
2779 struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */
2780 struct sockaddr rt_genmask; /* target network mask (IP) */
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002781 unsigned short rt_flags;
2782 short rt_pad2;
2783 u32 rt_pad3;
2784 unsigned char rt_tos;
2785 unsigned char rt_class;
2786 short rt_pad4;
2787 short rt_metric; /* +1 for binary compatibility! */
Arnd Bergmann7a229382009-11-06 23:00:29 -08002788 /* char * */ u32 rt_dev; /* forcing the device at add */
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002789 u32 rt_mtu; /* per route MTU/Window */
2790 u32 rt_window; /* Window clamping */
Arnd Bergmann7a229382009-11-06 23:00:29 -08002791 unsigned short rt_irtt; /* Initial RTT */
2792};
2793
2794struct in6_rtmsg32 {
2795 struct in6_addr rtmsg_dst;
2796 struct in6_addr rtmsg_src;
2797 struct in6_addr rtmsg_gateway;
2798 u32 rtmsg_type;
2799 u16 rtmsg_dst_len;
2800 u16 rtmsg_src_len;
2801 u32 rtmsg_metric;
2802 u32 rtmsg_info;
2803 u32 rtmsg_flags;
2804 s32 rtmsg_ifindex;
2805};
2806
Arnd Bergmann6b960182009-11-06 23:10:54 -08002807static int routing_ioctl(struct net *net, struct socket *sock,
2808 unsigned int cmd, void __user *argp)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002809{
2810 int ret;
2811 void *r = NULL;
2812 struct in6_rtmsg r6;
2813 struct rtentry r4;
2814 char devname[16];
2815 u32 rtdev;
2816 mm_segment_t old_fs = get_fs();
2817
Arnd Bergmann6b960182009-11-06 23:10:54 -08002818 if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */
2819 struct in6_rtmsg32 __user *ur6 = argp;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002820 ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst),
Arnd Bergmann7a229382009-11-06 23:00:29 -08002821 3 * sizeof(struct in6_addr));
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002822 ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type));
2823 ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len));
2824 ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len));
2825 ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric));
2826 ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info));
2827 ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags));
2828 ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex));
Arnd Bergmann7a229382009-11-06 23:00:29 -08002829
2830 r = (void *) &r6;
2831 } else { /* ipv4 */
Arnd Bergmann6b960182009-11-06 23:10:54 -08002832 struct rtentry32 __user *ur4 = argp;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002833 ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst),
Arnd Bergmann7a229382009-11-06 23:00:29 -08002834 3 * sizeof(struct sockaddr));
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002835 ret |= __get_user(r4.rt_flags, &(ur4->rt_flags));
2836 ret |= __get_user(r4.rt_metric, &(ur4->rt_metric));
2837 ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu));
2838 ret |= __get_user(r4.rt_window, &(ur4->rt_window));
2839 ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt));
2840 ret |= __get_user(rtdev, &(ur4->rt_dev));
Arnd Bergmann7a229382009-11-06 23:00:29 -08002841 if (rtdev) {
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002842 ret |= copy_from_user(devname, compat_ptr(rtdev), 15);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002843 r4.rt_dev = devname; devname[15] = 0;
2844 } else
2845 r4.rt_dev = NULL;
2846
2847 r = (void *) &r4;
2848 }
2849
2850 if (ret) {
2851 ret = -EFAULT;
2852 goto out;
2853 }
2854
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002855 set_fs(KERNEL_DS);
Arnd Bergmann6b960182009-11-06 23:10:54 -08002856 ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r);
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002857 set_fs(old_fs);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002858
2859out:
Arnd Bergmann7a229382009-11-06 23:00:29 -08002860 return ret;
2861}
2862
2863/* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
2864 * for some operations; this forces use of the newer bridge-utils that
2865 * use compatiable ioctls
2866 */
Arnd Bergmann6b960182009-11-06 23:10:54 -08002867static int old_bridge_ioctl(compat_ulong_t __user *argp)
Arnd Bergmann7a229382009-11-06 23:00:29 -08002868{
Arnd Bergmann6b960182009-11-06 23:10:54 -08002869 compat_ulong_t tmp;
Arnd Bergmann7a229382009-11-06 23:00:29 -08002870
Arnd Bergmann6b960182009-11-06 23:10:54 -08002871 if (get_user(tmp, argp))
Arnd Bergmann7a229382009-11-06 23:00:29 -08002872 return -EFAULT;
2873 if (tmp == BRCTL_GET_VERSION)
2874 return BRCTL_VERSION + 1;
2875 return -EINVAL;
2876}
2877
Arnd Bergmann6b960182009-11-06 23:10:54 -08002878static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
2879 unsigned int cmd, unsigned long arg)
2880{
2881 void __user *argp = compat_ptr(arg);
2882 struct sock *sk = sock->sk;
2883 struct net *net = sock_net(sk);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002884
Arnd Bergmann6b960182009-11-06 23:10:54 -08002885 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
2886 return siocdevprivate_ioctl(net, cmd, argp);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002887
Arnd Bergmann6b960182009-11-06 23:10:54 -08002888 switch (cmd) {
2889 case SIOCSIFBR:
2890 case SIOCGIFBR:
2891 return old_bridge_ioctl(argp);
2892 case SIOCGIFNAME:
2893 return dev_ifname32(net, argp);
2894 case SIOCGIFCONF:
2895 return dev_ifconf(net, argp);
2896 case SIOCETHTOOL:
2897 return ethtool_ioctl(net, argp);
Arnd Bergmann7a50a242009-11-08 20:57:03 -08002898 case SIOCWANDEV:
2899 return compat_siocwandev(net, argp);
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002900 case SIOCGIFMAP:
2901 case SIOCSIFMAP:
2902 return compat_sioc_ifmap(net, cmd, argp);
Arnd Bergmann6b960182009-11-06 23:10:54 -08002903 case SIOCBONDENSLAVE:
2904 case SIOCBONDRELEASE:
2905 case SIOCBONDSETHWADDR:
2906 case SIOCBONDSLAVEINFOQUERY:
2907 case SIOCBONDINFOQUERY:
2908 case SIOCBONDCHANGEACTIVE:
2909 return bond_ioctl(net, cmd, argp);
2910 case SIOCADDRT:
2911 case SIOCDELRT:
2912 return routing_ioctl(net, sock, cmd, argp);
2913 case SIOCGSTAMP:
2914 return do_siocgstamp(net, sock, cmd, argp);
2915 case SIOCGSTAMPNS:
2916 return do_siocgstampns(net, sock, cmd, argp);
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002917 case SIOCSHWTSTAMP:
2918 return compat_siocshwtstamp(net, argp);
Arnd Bergmann7a229382009-11-06 23:00:29 -08002919
Arnd Bergmann6b960182009-11-06 23:10:54 -08002920 case FIOSETOWN:
2921 case SIOCSPGRP:
2922 case FIOGETOWN:
2923 case SIOCGPGRP:
2924 case SIOCBRADDBR:
2925 case SIOCBRDELBR:
2926 case SIOCGIFVLAN:
2927 case SIOCSIFVLAN:
2928 case SIOCADDDLCI:
2929 case SIOCDELDLCI:
2930 return sock_ioctl(file, cmd, arg);
2931
2932 case SIOCGIFFLAGS:
2933 case SIOCSIFFLAGS:
2934 case SIOCGIFMETRIC:
2935 case SIOCSIFMETRIC:
2936 case SIOCGIFMTU:
2937 case SIOCSIFMTU:
2938 case SIOCGIFMEM:
2939 case SIOCSIFMEM:
2940 case SIOCGIFHWADDR:
2941 case SIOCSIFHWADDR:
2942 case SIOCADDMULTI:
2943 case SIOCDELMULTI:
2944 case SIOCGIFINDEX:
Arnd Bergmann6b960182009-11-06 23:10:54 -08002945 case SIOCGIFADDR:
2946 case SIOCSIFADDR:
2947 case SIOCSIFHWBROADCAST:
Arnd Bergmann6b960182009-11-06 23:10:54 -08002948 case SIOCDIFADDR:
Arnd Bergmann6b960182009-11-06 23:10:54 -08002949 case SIOCGIFBRDADDR:
2950 case SIOCSIFBRDADDR:
2951 case SIOCGIFDSTADDR:
2952 case SIOCSIFDSTADDR:
2953 case SIOCGIFNETMASK:
2954 case SIOCSIFNETMASK:
2955 case SIOCSIFPFLAGS:
2956 case SIOCGIFPFLAGS:
2957 case SIOCGIFTXQLEN:
2958 case SIOCSIFTXQLEN:
2959 case SIOCBRADDIF:
2960 case SIOCBRDELIF:
Arnd Bergmann9177efd2009-11-06 08:09:09 +00002961 case SIOCSIFNAME:
2962 case SIOCGMIIPHY:
2963 case SIOCGMIIREG:
2964 case SIOCSMIIREG:
Arnd Bergmann6b960182009-11-06 23:10:54 -08002965 return dev_ifsioc(net, sock, cmd, argp);
Arnd Bergmann9177efd2009-11-06 08:09:09 +00002966
Arnd Bergmann6b960182009-11-06 23:10:54 -08002967 case SIOCSARP:
2968 case SIOCGARP:
2969 case SIOCDARP:
Arnd Bergmann6b960182009-11-06 23:10:54 -08002970 case SIOCATMARK:
Arnd Bergmann9177efd2009-11-06 08:09:09 +00002971 return sock_do_ioctl(net, sock, cmd, arg);
2972 }
2973
2974 /* Prevent warning from compat_sys_ioctl, these always
2975 * result in -EINVAL in the native case anyway. */
2976 switch (cmd) {
2977 case SIOCRTMSG:
2978 case SIOCGIFCOUNT:
Arnd Bergmann6b960182009-11-06 23:10:54 -08002979 case SIOCSRARP:
2980 case SIOCGRARP:
2981 case SIOCDRARP:
Arnd Bergmann9177efd2009-11-06 08:09:09 +00002982 case SIOCSIFLINK:
2983 case SIOCGIFSLAVE:
2984 case SIOCSIFSLAVE:
2985 return -EINVAL;
Arnd Bergmann6b960182009-11-06 23:10:54 -08002986 }
2987
2988 return -ENOIOCTLCMD;
2989}
Arnd Bergmann7a229382009-11-06 23:00:29 -08002990
Shaun Pereira89bbfc92006-03-21 23:58:08 -08002991static long compat_sock_ioctl(struct file *file, unsigned cmd,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002992 unsigned long arg)
Shaun Pereira89bbfc92006-03-21 23:58:08 -08002993{
2994 struct socket *sock = file->private_data;
2995 int ret = -ENOIOCTLCMD;
David S. Miller87de87d2008-06-03 09:14:03 -07002996 struct sock *sk;
2997 struct net *net;
2998
2999 sk = sock->sk;
3000 net = sock_net(sk);
Shaun Pereira89bbfc92006-03-21 23:58:08 -08003001
3002 if (sock->ops->compat_ioctl)
3003 ret = sock->ops->compat_ioctl(sock, cmd, arg);
3004
David S. Miller87de87d2008-06-03 09:14:03 -07003005 if (ret == -ENOIOCTLCMD &&
3006 (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST))
3007 ret = compat_wext_handle_ioctl(net, cmd, arg);
3008
Arnd Bergmann6b960182009-11-06 23:10:54 -08003009 if (ret == -ENOIOCTLCMD)
3010 ret = compat_sock_ioctl_trans(file, sock, cmd, arg);
3011
Shaun Pereira89bbfc92006-03-21 23:58:08 -08003012 return ret;
3013}
3014#endif
3015
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003016int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
3017{
3018 return sock->ops->bind(sock, addr, addrlen);
3019}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003020EXPORT_SYMBOL(kernel_bind);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003021
3022int kernel_listen(struct socket *sock, int backlog)
3023{
3024 return sock->ops->listen(sock, backlog);
3025}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003026EXPORT_SYMBOL(kernel_listen);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003027
3028int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
3029{
3030 struct sock *sk = sock->sk;
3031 int err;
3032
3033 err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol,
3034 newsock);
3035 if (err < 0)
3036 goto done;
3037
3038 err = sock->ops->accept(sock, *newsock, flags);
3039 if (err < 0) {
3040 sock_release(*newsock);
Tony Battersbyfa8705b2007-10-10 21:09:04 -07003041 *newsock = NULL;
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003042 goto done;
3043 }
3044
3045 (*newsock)->ops = sock->ops;
Wei Yongjun1b085342008-12-18 19:35:10 -08003046 __module_get((*newsock)->ops->owner);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003047
3048done:
3049 return err;
3050}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003051EXPORT_SYMBOL(kernel_accept);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003052
3053int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +09003054 int flags)
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003055{
3056 return sock->ops->connect(sock, addr, addrlen, flags);
3057}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003058EXPORT_SYMBOL(kernel_connect);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003059
3060int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
3061 int *addrlen)
3062{
3063 return sock->ops->getname(sock, addr, addrlen, 0);
3064}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003065EXPORT_SYMBOL(kernel_getsockname);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003066
3067int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
3068 int *addrlen)
3069{
3070 return sock->ops->getname(sock, addr, addrlen, 1);
3071}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003072EXPORT_SYMBOL(kernel_getpeername);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003073
3074int kernel_getsockopt(struct socket *sock, int level, int optname,
3075 char *optval, int *optlen)
3076{
3077 mm_segment_t oldfs = get_fs();
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003078 char __user *uoptval;
3079 int __user *uoptlen;
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003080 int err;
3081
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003082 uoptval = (char __user __force *) optval;
3083 uoptlen = (int __user __force *) optlen;
3084
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003085 set_fs(KERNEL_DS);
3086 if (level == SOL_SOCKET)
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003087 err = sock_getsockopt(sock, level, optname, uoptval, uoptlen);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003088 else
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003089 err = sock->ops->getsockopt(sock, level, optname, uoptval,
3090 uoptlen);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003091 set_fs(oldfs);
3092 return err;
3093}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003094EXPORT_SYMBOL(kernel_getsockopt);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003095
3096int kernel_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07003097 char *optval, unsigned int optlen)
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003098{
3099 mm_segment_t oldfs = get_fs();
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003100 char __user *uoptval;
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003101 int err;
3102
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003103 uoptval = (char __user __force *) optval;
3104
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003105 set_fs(KERNEL_DS);
3106 if (level == SOL_SOCKET)
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003107 err = sock_setsockopt(sock, level, optname, uoptval, optlen);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003108 else
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003109 err = sock->ops->setsockopt(sock, level, optname, uoptval,
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003110 optlen);
3111 set_fs(oldfs);
3112 return err;
3113}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003114EXPORT_SYMBOL(kernel_setsockopt);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003115
3116int kernel_sendpage(struct socket *sock, struct page *page, int offset,
3117 size_t size, int flags)
3118{
Herbert Xuf8451722010-05-24 00:12:34 -07003119 sock_update_classid(sock->sk);
3120
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003121 if (sock->ops->sendpage)
3122 return sock->ops->sendpage(sock, page, offset, size, flags);
3123
3124 return sock_no_sendpage(sock, page, offset, size, flags);
3125}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003126EXPORT_SYMBOL(kernel_sendpage);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003127
3128int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
3129{
3130 mm_segment_t oldfs = get_fs();
3131 int err;
3132
3133 set_fs(KERNEL_DS);
3134 err = sock->ops->ioctl(sock, cmd, arg);
3135 set_fs(oldfs);
3136
3137 return err;
3138}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003139EXPORT_SYMBOL(kernel_sock_ioctl);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003140
Trond Myklebust91cf45f2007-11-12 18:10:39 -08003141int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
3142{
3143 return sock->ops->shutdown(sock, how);
3144}
Trond Myklebust91cf45f2007-11-12 18:10:39 -08003145EXPORT_SYMBOL(kernel_sock_shutdown);