blob: dd2c247c99e30a7950323c85e1ea9cb604eac218 [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/if_bridge.h>
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -030073#include <linux/if_frad.h>
74#include <linux/if_vlan.h>
Daniel Borkmann408eccc2014-04-01 16:20:23 +020075#include <linux/ptp_classify.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 Black1fd7317d2009-09-22 16:43:33 -070089#include <linux/magic.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090090#include <linux/slab.h>
Masatake YAMATO600e1772012-08-29 10:44:29 +000091#include <linux/xattr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93#include <asm/uaccess.h>
94#include <asm/unistd.h>
95
96#include <net/compat.h>
David S. Miller87de87d2008-06-03 09:14:03 -070097#include <net/wext.h>
Herbert Xuf8451722010-05-24 00:12:34 -070098#include <net/cls_cgroup.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
100#include <net/sock.h>
101#include <linux/netfilter.h>
102
Arnd Bergmann6b960182009-11-06 23:10:54 -0800103#include <linux/if_tun.h>
104#include <linux/ipv6_route.h>
105#include <linux/route.h>
Arnd Bergmann6b960182009-11-06 23:10:54 -0800106#include <linux/sockios.h>
107#include <linux/atalk.h>
Eliezer Tamir076bb0c2013-07-10 17:13:17 +0300108#include <net/busy_poll.h>
Willem de Bruijnf24b9be2014-08-04 22:11:45 -0400109#include <linux/errqueue.h>
Eliezer Tamir06021292013-06-10 11:39:50 +0300110
Cong Wange0d10952013-08-01 11:10:25 +0800111#ifdef CONFIG_NET_RX_BUSY_POLL
Eliezer Tamir64b0dc52013-07-10 17:13:36 +0300112unsigned int sysctl_net_busy_read __read_mostly;
113unsigned int sysctl_net_busy_poll __read_mostly;
Eliezer Tamir06021292013-06-10 11:39:50 +0300114#endif
Arnd Bergmann6b960182009-11-06 23:10:54 -0800115
Al Viro8ae5e032014-11-28 19:40:50 -0500116static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to);
117static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700118static int sock_mmap(struct file *file, struct vm_area_struct *vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
120static int sock_close(struct inode *inode, struct file *file);
121static unsigned int sock_poll(struct file *file,
122 struct poll_table_struct *wait);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700123static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800124#ifdef CONFIG_COMPAT
125static long compat_sock_ioctl(struct file *file,
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700126 unsigned int cmd, unsigned long arg);
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800127#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128static int sock_fasync(int fd, struct file *filp, int on);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129static ssize_t sock_sendpage(struct file *file, struct page *page,
130 int offset, size_t size, loff_t *ppos, int more);
Jens Axboe9c55e012007-11-06 23:30:13 -0800131static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700132 struct pipe_inode_info *pipe, size_t len,
Jens Axboe9c55e012007-11-06 23:30:13 -0800133 unsigned int flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135/*
136 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
137 * in the operation structures but are done directly via the socketcall() multiplexor.
138 */
139
Arjan van de Venda7071d2007-02-12 00:55:36 -0800140static const struct file_operations socket_file_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 .owner = THIS_MODULE,
142 .llseek = no_llseek,
Al Viro8ae5e032014-11-28 19:40:50 -0500143 .read_iter = sock_read_iter,
144 .write_iter = sock_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 .poll = sock_poll,
146 .unlocked_ioctl = sock_ioctl,
Shaun Pereira89bbfc92006-03-21 23:58:08 -0800147#ifdef CONFIG_COMPAT
148 .compat_ioctl = compat_sock_ioctl,
149#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 .mmap = sock_mmap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 .release = sock_close,
152 .fasync = sock_fasync,
Jens Axboe5274f052006-03-30 15:15:30 +0200153 .sendpage = sock_sendpage,
154 .splice_write = generic_splice_sendpage,
Jens Axboe9c55e012007-11-06 23:30:13 -0800155 .splice_read = sock_splice_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156};
157
158/*
159 * The protocol list. Each protocol is registered in here.
160 */
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162static DEFINE_SPINLOCK(net_family_lock);
Eric Dumazet190683a2010-11-10 10:50:44 +0000163static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165/*
166 * Statistics counters of the socket lists
167 */
168
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700169static DEFINE_PER_CPU(int, sockets_in_use);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700172 * Support routines.
173 * Move socket addresses back and forth across the kernel/user
174 * divide and look after the messy bits.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 */
176
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177/**
178 * move_addr_to_kernel - copy a socket address into kernel space
179 * @uaddr: Address in user space
180 * @kaddr: Address in kernel space
181 * @ulen: Length in user space
182 *
183 * The address is copied into kernel space. If the provided address is
184 * too long an error code of -EINVAL is returned. If the copy gives
185 * invalid addresses -EFAULT is returned. On a success 0 is returned.
186 */
187
Maciej Żenczykowski43db3622012-03-11 12:51:50 +0000188int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189{
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -0700190 if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700192 if (ulen == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 return 0;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700194 if (copy_from_user(kaddr, uaddr, ulen))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 return -EFAULT;
David Woodhouse3ec3b2f2005-05-17 12:08:48 +0100196 return audit_sockaddr(ulen, kaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197}
198
199/**
200 * move_addr_to_user - copy an address to user space
201 * @kaddr: kernel space address
202 * @klen: length of address in kernel
203 * @uaddr: user space address
204 * @ulen: pointer to user length field
205 *
206 * The value pointed to by ulen on entry is the buffer length available.
207 * This is overwritten with the buffer space used. -EINVAL is returned
208 * if an overlong buffer is specified or a negative buffer size. -EFAULT
209 * is returned if either the buffer or the length field are not
210 * accessible.
211 * After copying the data up to the limit the user specifies, the true
212 * length of the data is written over the length limit the user
213 * specified. Zero is returned for a success.
214 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700215
Maciej Żenczykowski43db3622012-03-11 12:51:50 +0000216static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen,
stephen hemminger11165f12010-10-18 14:27:29 +0000217 void __user *uaddr, int __user *ulen)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
219 int err;
220 int len;
221
Hannes Frederic Sowa68c6beb2013-11-21 03:14:34 +0100222 BUG_ON(klen > sizeof(struct sockaddr_storage));
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700223 err = get_user(len, ulen);
224 if (err)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 return err;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700226 if (len > klen)
227 len = klen;
Hannes Frederic Sowa68c6beb2013-11-21 03:14:34 +0100228 if (len < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700230 if (len) {
Steve Grubbd6fe3942006-03-30 12:20:22 -0500231 if (audit_sockaddr(klen, kaddr))
232 return -ENOMEM;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700233 if (copy_to_user(uaddr, kaddr, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 return -EFAULT;
235 }
236 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700237 * "fromlen shall refer to the value before truncation.."
238 * 1003.1g
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 */
240 return __put_user(klen, ulen);
241}
242
Christoph Lametere18b8902006-12-06 20:33:20 -0800243static struct kmem_cache *sock_inode_cachep __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
245static struct inode *sock_alloc_inode(struct super_block *sb)
246{
247 struct socket_alloc *ei;
Eric Dumazeteaefd112011-02-18 03:26:36 +0000248 struct socket_wq *wq;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700249
Christoph Lametere94b1762006-12-06 20:33:17 -0800250 ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 if (!ei)
252 return NULL;
Eric Dumazeteaefd112011-02-18 03:26:36 +0000253 wq = kmalloc(sizeof(*wq), GFP_KERNEL);
254 if (!wq) {
Eric Dumazet43815482010-04-29 11:01:49 +0000255 kmem_cache_free(sock_inode_cachep, ei);
256 return NULL;
257 }
Eric Dumazeteaefd112011-02-18 03:26:36 +0000258 init_waitqueue_head(&wq->wait);
259 wq->fasync_list = NULL;
260 RCU_INIT_POINTER(ei->socket.wq, wq);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 ei->socket.state = SS_UNCONNECTED;
263 ei->socket.flags = 0;
264 ei->socket.ops = NULL;
265 ei->socket.sk = NULL;
266 ei->socket.file = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
268 return &ei->vfs_inode;
269}
270
271static void sock_destroy_inode(struct inode *inode)
272{
Eric Dumazet43815482010-04-29 11:01:49 +0000273 struct socket_alloc *ei;
Eric Dumazeteaefd112011-02-18 03:26:36 +0000274 struct socket_wq *wq;
Eric Dumazet43815482010-04-29 11:01:49 +0000275
276 ei = container_of(inode, struct socket_alloc, vfs_inode);
Eric Dumazeteaefd112011-02-18 03:26:36 +0000277 wq = rcu_dereference_protected(ei->socket.wq, 1);
Lai Jiangshan61845222011-03-18 12:10:25 +0800278 kfree_rcu(wq, rcu);
Eric Dumazet43815482010-04-29 11:01:49 +0000279 kmem_cache_free(sock_inode_cachep, ei);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280}
281
Alexey Dobriyan51cc5062008-07-25 19:45:34 -0700282static void init_once(void *foo)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700284 struct socket_alloc *ei = (struct socket_alloc *)foo;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285
Christoph Lametera35afb82007-05-16 22:10:57 -0700286 inode_init_once(&ei->vfs_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287}
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700288
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289static int init_inodecache(void)
290{
291 sock_inode_cachep = kmem_cache_create("sock_inode_cache",
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700292 sizeof(struct socket_alloc),
293 0,
294 (SLAB_HWCACHE_ALIGN |
295 SLAB_RECLAIM_ACCOUNT |
296 SLAB_MEM_SPREAD),
Paul Mundt20c2df82007-07-20 10:11:58 +0900297 init_once);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 if (sock_inode_cachep == NULL)
299 return -ENOMEM;
300 return 0;
301}
302
Alexey Dobriyanb87221d2009-09-21 17:01:09 -0700303static const struct super_operations sockfs_ops = {
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700304 .alloc_inode = sock_alloc_inode,
305 .destroy_inode = sock_destroy_inode,
306 .statfs = simple_statfs,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307};
308
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700309/*
310 * sockfs_dname() is called from d_path().
311 */
312static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen)
313{
314 return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]",
David Howellsc5ef6032015-03-17 22:26:16 +0000315 d_inode(dentry)->i_ino);
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700316}
317
Al Viro3ba13d12009-02-20 06:02:22 +0000318static const struct dentry_operations sockfs_dentry_operations = {
Eric Dumazetc23fbb62007-05-08 00:26:18 -0700319 .d_dname = sockfs_dname,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320};
321
Al Viroc74a1cb2011-01-12 16:59:34 -0500322static struct dentry *sockfs_mount(struct file_system_type *fs_type,
323 int flags, const char *dev_name, void *data)
324{
325 return mount_pseudo(fs_type, "socket:", &sockfs_ops,
326 &sockfs_dentry_operations, SOCKFS_MAGIC);
327}
328
329static struct vfsmount *sock_mnt __read_mostly;
330
331static struct file_system_type sock_fs_type = {
332 .name = "sockfs",
333 .mount = sockfs_mount,
334 .kill_sb = kill_anon_super,
335};
336
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337/*
338 * Obtains the first available file descriptor and sets it up for use.
339 *
David S. Miller39d8c1b2006-03-20 17:13:49 -0800340 * These functions create file structures and maps them to fd space
341 * of the current process. On success it returns file descriptor
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 * and file struct implicitly stored in sock->file.
343 * Note that another thread may close file descriptor before we return
344 * from this function. We use the fact that now we do not refer
345 * to socket after mapping. If one day we will need it, this
346 * function will increment ref. count on file by 1.
347 *
348 * In any case returned fd MAY BE not valid!
349 * This race condition is unavoidable
350 * with shared fd spaces, we cannot solve it inside kernel,
351 * but we take care of internal coherence yet.
352 */
353
Linus Torvaldsaab174f2012-10-02 20:25:04 -0700354struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355{
Al Viro7cbe66b2009-08-05 19:59:08 +0400356 struct qstr name = { .name = "" };
Al Viro2c48b9c2009-08-09 00:52:35 +0400357 struct path path;
Al Viro7cbe66b2009-08-05 19:59:08 +0400358 struct file *file;
David S. Miller39d8c1b2006-03-20 17:13:49 -0800359
Masatake YAMATO600e1772012-08-29 10:44:29 +0000360 if (dname) {
361 name.name = dname;
362 name.len = strlen(name.name);
363 } else if (sock->sk) {
364 name.name = sock->sk->sk_prot_creator->name;
365 name.len = strlen(name.name);
366 }
Nick Piggin4b936882011-01-07 17:50:07 +1100367 path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name);
Al Viro28407632012-08-17 23:54:15 -0400368 if (unlikely(!path.dentry))
369 return ERR_PTR(-ENOMEM);
Al Viro2c48b9c2009-08-09 00:52:35 +0400370 path.mnt = mntget(sock_mnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
Al Viro2c48b9c2009-08-09 00:52:35 +0400372 d_instantiate(path.dentry, SOCK_INODE(sock));
Al Virocc3808f2009-08-06 09:43:59 +0400373
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);
Viresh Kumarb5ffe632015-08-12 15:59:47 +0530376 if (IS_ERR(file)) {
Al Virocc3808f2009-08-06 09:43:59 +0400377 /* drop dentry, keep inode */
David Howellsc5ef6032015-03-17 22:26:16 +0000378 ihold(d_inode(path.dentry));
Al Viro2c48b9c2009-08-09 00:52:35 +0400379 path_put(&path);
Anatol Pomozov39b65252012-09-12 20:11:55 -0700380 return file;
Al Virocc3808f2009-08-06 09:43:59 +0400381 }
David S. Miller39d8c1b2006-03-20 17:13:49 -0800382
383 sock->file = file;
Ulrich Drepper77d27202008-07-23 21:29:35 -0700384 file->f_flags = O_RDWR | (flags & O_NONBLOCK);
David S. Miller39d8c1b2006-03-20 17:13:49 -0800385 file->private_data = sock;
Al Viro28407632012-08-17 23:54:15 -0400386 return file;
David S. Miller39d8c1b2006-03-20 17:13:49 -0800387}
Al Viro56b31d12012-08-18 00:25:51 -0400388EXPORT_SYMBOL(sock_alloc_file);
David S. Miller39d8c1b2006-03-20 17:13:49 -0800389
Al Viro56b31d12012-08-18 00:25:51 -0400390static int sock_map_fd(struct socket *sock, int flags)
David S. Miller39d8c1b2006-03-20 17:13:49 -0800391{
392 struct file *newfile;
Al Viro28407632012-08-17 23:54:15 -0400393 int fd = get_unused_fd_flags(flags);
394 if (unlikely(fd < 0))
395 return fd;
David S. Miller39d8c1b2006-03-20 17:13:49 -0800396
Linus Torvaldsaab174f2012-10-02 20:25:04 -0700397 newfile = sock_alloc_file(sock, flags, NULL);
Al Viro28407632012-08-17 23:54:15 -0400398 if (likely(!IS_ERR(newfile))) {
David S. Miller39d8c1b2006-03-20 17:13:49 -0800399 fd_install(fd, newfile);
Al Viro28407632012-08-17 23:54:15 -0400400 return fd;
401 }
Al Viro7cbe66b2009-08-05 19:59:08 +0400402
Al Viro28407632012-08-17 23:54:15 -0400403 put_unused_fd(fd);
404 return PTR_ERR(newfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405}
406
John Fastabend406a3c62012-07-20 10:39:25 +0000407struct socket *sock_from_file(struct file *file, int *err)
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800408{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800409 if (file->f_op == &socket_file_ops)
410 return file->private_data; /* set in sock_map_fd */
411
Eric Dumazet23bb80d2007-02-08 14:59:57 -0800412 *err = -ENOTSOCK;
413 return NULL;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800414}
John Fastabend406a3c62012-07-20 10:39:25 +0000415EXPORT_SYMBOL(sock_from_file);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800416
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417/**
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700418 * sockfd_lookup - Go from a file number to its socket slot
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 * @fd: file handle
420 * @err: pointer to an error code return
421 *
422 * The file handle passed in is locked and the socket it is bound
423 * too is returned. If an error occurs the err pointer is overwritten
424 * with a negative errno code and NULL is returned. The function checks
425 * for both invalid handles and passing a handle which is not a socket.
426 *
427 * On a success the socket object pointer is returned.
428 */
429
430struct socket *sockfd_lookup(int fd, int *err)
431{
432 struct file *file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 struct socket *sock;
434
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700435 file = fget(fd);
436 if (!file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 *err = -EBADF;
438 return NULL;
439 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700440
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800441 sock = sock_from_file(file, err);
442 if (!sock)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 fput(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 return sock;
445}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700446EXPORT_SYMBOL(sockfd_lookup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800448static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
449{
Al Viro00e188e2014-03-03 23:48:18 -0500450 struct fd f = fdget(fd);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800451 struct socket *sock;
452
Hua Zhong36725582006-04-19 15:25:02 -0700453 *err = -EBADF;
Al Viro00e188e2014-03-03 23:48:18 -0500454 if (f.file) {
455 sock = sock_from_file(f.file, err);
456 if (likely(sock)) {
457 *fput_needed = f.flags;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800458 return sock;
Al Viro00e188e2014-03-03 23:48:18 -0500459 }
460 fdput(f);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -0800461 }
462 return NULL;
463}
464
Masatake YAMATO600e1772012-08-29 10:44:29 +0000465#define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname"
466#define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX)
467#define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1)
468static ssize_t sockfs_getxattr(struct dentry *dentry,
469 const char *name, void *value, size_t size)
470{
471 const char *proto_name;
472 size_t proto_size;
473 int error;
474
475 error = -ENODATA;
476 if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) {
477 proto_name = dentry->d_name.name;
478 proto_size = strlen(proto_name);
479
480 if (value) {
481 error = -ERANGE;
482 if (proto_size + 1 > size)
483 goto out;
484
485 strncpy(value, proto_name, proto_size + 1);
486 }
487 error = proto_size + 1;
488 }
489
490out:
491 return error;
492}
493
494static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer,
495 size_t size)
496{
497 ssize_t len;
498 ssize_t used = 0;
499
David Howellsc5ef6032015-03-17 22:26:16 +0000500 len = security_inode_listsecurity(d_inode(dentry), buffer, size);
Masatake YAMATO600e1772012-08-29 10:44:29 +0000501 if (len < 0)
502 return len;
503 used += len;
504 if (buffer) {
505 if (size < used)
506 return -ERANGE;
507 buffer += len;
508 }
509
510 len = (XATTR_NAME_SOCKPROTONAME_LEN + 1);
511 used += len;
512 if (buffer) {
513 if (size < used)
514 return -ERANGE;
515 memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len);
516 buffer += len;
517 }
518
519 return used;
520}
521
522static const struct inode_operations sockfs_inode_ops = {
523 .getxattr = sockfs_getxattr,
524 .listxattr = sockfs_listxattr,
525};
526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527/**
528 * sock_alloc - allocate a socket
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700529 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 * Allocate a new inode and socket object. The two are bound together
531 * and initialised. The socket is then returned. If we are out of inodes
532 * NULL is returned.
533 */
534
535static struct socket *sock_alloc(void)
536{
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700537 struct inode *inode;
538 struct socket *sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539
Eric Dumazeta209dfc2011-07-26 11:36:34 +0200540 inode = new_inode_pseudo(sock_mnt->mnt_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700541 if (!inode)
542 return NULL;
543
544 sock = SOCKET_I(inode);
545
Eric Dumazet29a020d2009-09-15 02:39:20 -0700546 kmemcheck_annotate_bitfield(sock, type);
Christoph Hellwig85fe4022010-10-23 11:19:54 -0400547 inode->i_ino = get_next_ino();
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700548 inode->i_mode = S_IFSOCK | S_IRWXUGO;
David Howells8192b0c2008-11-14 10:39:10 +1100549 inode->i_uid = current_fsuid();
550 inode->i_gid = current_fsgid();
Masatake YAMATO600e1772012-08-29 10:44:29 +0000551 inode->i_op = &sockfs_inode_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Alex Shi19e8d692012-05-14 14:15:31 -0700553 this_cpu_add(sockets_in_use, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 return sock;
555}
556
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557/**
558 * sock_release - close a socket
559 * @sock: socket to close
560 *
561 * The socket is released from the protocol stack if it has a release
562 * callback, and the inode is then released if the socket is bound to
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700563 * an inode not a file.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700565
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566void sock_release(struct socket *sock)
567{
568 if (sock->ops) {
569 struct module *owner = sock->ops->owner;
570
571 sock->ops->release(sock);
572 sock->ops = NULL;
573 module_put(owner);
574 }
575
Eric Dumazeteaefd112011-02-18 03:26:36 +0000576 if (rcu_dereference_protected(sock->wq, 1)->fasync_list)
Yang Yingliang3410f222014-02-12 17:09:55 +0800577 pr_err("%s: fasync list not empty!\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
Alex Shi19e8d692012-05-14 14:15:31 -0700579 this_cpu_sub(sockets_in_use, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 if (!sock->file) {
581 iput(SOCK_INODE(sock));
582 return;
583 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700584 sock->file = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700586EXPORT_SYMBOL(sock_release);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587
Willem de Bruijn67cc0d42014-09-08 19:58:58 -0400588void __sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags)
Patrick Ohly20d49472009-02-12 05:03:38 +0000589{
Eric Dumazet140c55d2014-08-06 11:49:29 +0200590 u8 flags = *tx_flags;
591
Willem de Bruijnb9f40e22014-08-04 22:11:46 -0400592 if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_HARDWARE)
Eric Dumazet140c55d2014-08-06 11:49:29 +0200593 flags |= SKBTX_HW_TSTAMP;
594
Willem de Bruijnb9f40e22014-08-04 22:11:46 -0400595 if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SOFTWARE)
Eric Dumazet140c55d2014-08-06 11:49:29 +0200596 flags |= SKBTX_SW_TSTAMP;
597
Willem de Bruijne7fd2882014-08-04 22:11:48 -0400598 if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED)
Eric Dumazet140c55d2014-08-06 11:49:29 +0200599 flags |= SKBTX_SCHED_TSTAMP;
600
Willem de Bruijne1c8a602014-08-04 22:11:50 -0400601 if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK)
Eric Dumazet140c55d2014-08-06 11:49:29 +0200602 flags |= SKBTX_ACK_TSTAMP;
Willem de Bruijne7fd2882014-08-04 22:11:48 -0400603
Eric Dumazet140c55d2014-08-06 11:49:29 +0200604 *tx_flags = flags;
Patrick Ohly20d49472009-02-12 05:03:38 +0000605}
Willem de Bruijn67cc0d42014-09-08 19:58:58 -0400606EXPORT_SYMBOL(__sock_tx_timestamp);
Patrick Ohly20d49472009-02-12 05:03:38 +0000607
Al Virod8725c82014-12-11 00:02:50 -0500608static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609{
Al Viro01e97e62014-12-15 21:39:31 -0500610 int ret = sock->ops->sendmsg(sock, msg, msg_data_left(msg));
Al Virod8725c82014-12-11 00:02:50 -0500611 BUG_ON(ret == -EIOCBQUEUED);
612 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613}
Gu Zheng0cf00c62014-12-05 15:14:23 +0800614
Al Virod8725c82014-12-11 00:02:50 -0500615int sock_sendmsg(struct socket *sock, struct msghdr *msg)
Gu Zheng0cf00c62014-12-05 15:14:23 +0800616{
Al Virod8725c82014-12-11 00:02:50 -0500617 int err = security_socket_sendmsg(sock, msg,
Al Viro01e97e62014-12-15 21:39:31 -0500618 msg_data_left(msg));
Ying Xue1b784142015-03-02 15:37:48 +0800619
Al Virod8725c82014-12-11 00:02:50 -0500620 return err ?: sock_sendmsg_nosec(sock, msg);
Gu Zheng0cf00c62014-12-05 15:14:23 +0800621}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700622EXPORT_SYMBOL(sock_sendmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623
624int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
625 struct kvec *vec, size_t num, size_t size)
626{
Al Viro6aa24812015-03-21 19:56:16 -0400627 iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size);
Al Virod8725c82014-12-11 00:02:50 -0500628 return sock_sendmsg(sock, msg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700630EXPORT_SYMBOL(kernel_sendmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700632/*
633 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
634 */
635void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
636 struct sk_buff *skb)
637{
Patrick Ohly20d49472009-02-12 05:03:38 +0000638 int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP);
Willem de Bruijnf24b9be2014-08-04 22:11:45 -0400639 struct scm_timestamping tss;
Patrick Ohly20d49472009-02-12 05:03:38 +0000640 int empty = 1;
641 struct skb_shared_hwtstamps *shhwtstamps =
642 skb_hwtstamps(skb);
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700643
Patrick Ohly20d49472009-02-12 05:03:38 +0000644 /* Race occurred between timestamp enabling and packet
645 receiving. Fill in the current time for now. */
646 if (need_software_tstamp && skb->tstamp.tv64 == 0)
647 __net_timestamp(skb);
648
649 if (need_software_tstamp) {
650 if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
651 struct timeval tv;
652 skb_get_timestamp(skb, &tv);
653 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
654 sizeof(tv), &tv);
655 } else {
Willem de Bruijnf24b9be2014-08-04 22:11:45 -0400656 struct timespec ts;
657 skb_get_timestampns(skb, &ts);
Patrick Ohly20d49472009-02-12 05:03:38 +0000658 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS,
Willem de Bruijnf24b9be2014-08-04 22:11:45 -0400659 sizeof(ts), &ts);
Patrick Ohly20d49472009-02-12 05:03:38 +0000660 }
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700661 }
Patrick Ohly20d49472009-02-12 05:03:38 +0000662
Willem de Bruijnf24b9be2014-08-04 22:11:45 -0400663 memset(&tss, 0, sizeof(tss));
Willem de Bruijnc1991052014-09-03 12:01:18 -0400664 if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) &&
Willem de Bruijnf24b9be2014-08-04 22:11:45 -0400665 ktime_to_timespec_cond(skb->tstamp, tss.ts + 0))
Patrick Ohly20d49472009-02-12 05:03:38 +0000666 empty = 0;
Willem de Bruijn4d276eb2014-07-25 18:01:32 -0400667 if (shhwtstamps &&
Willem de Bruijnb9f40e22014-08-04 22:11:46 -0400668 (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) &&
Willem de Bruijnf24b9be2014-08-04 22:11:45 -0400669 ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2))
Willem de Bruijn4d276eb2014-07-25 18:01:32 -0400670 empty = 0;
Patrick Ohly20d49472009-02-12 05:03:38 +0000671 if (!empty)
672 put_cmsg(msg, SOL_SOCKET,
Willem de Bruijnf24b9be2014-08-04 22:11:45 -0400673 SCM_TIMESTAMPING, sizeof(tss), &tss);
Eric Dumazet92f37fd2007-03-25 22:14:49 -0700674}
Arnaldo Carvalho de Melo7c81fd82007-03-10 00:39:35 -0300675EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
676
Johannes Berg6e3e9392011-11-09 10:15:42 +0100677void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
678 struct sk_buff *skb)
679{
680 int ack;
681
682 if (!sock_flag(sk, SOCK_WIFI_STATUS))
683 return;
684 if (!skb->wifi_acked_valid)
685 return;
686
687 ack = skb->wifi_acked;
688
689 put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack);
690}
691EXPORT_SYMBOL_GPL(__sock_recv_wifi_status);
692
stephen hemminger11165f12010-10-18 14:27:29 +0000693static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk,
694 struct sk_buff *skb)
Neil Horman3b885782009-10-12 13:26:31 -0700695{
Eyal Birger744d5a32015-03-01 14:58:31 +0200696 if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount)
Neil Horman3b885782009-10-12 13:26:31 -0700697 put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL,
Eyal Birger744d5a32015-03-01 14:58:31 +0200698 sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount);
Neil Horman3b885782009-10-12 13:26:31 -0700699}
700
Eric Dumazet767dd032010-04-28 19:14:43 +0000701void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
Neil Horman3b885782009-10-12 13:26:31 -0700702 struct sk_buff *skb)
703{
704 sock_recv_timestamp(msg, sk, skb);
705 sock_recv_drops(msg, sk, skb);
706}
Eric Dumazet767dd032010-04-28 19:14:43 +0000707EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops);
Neil Horman3b885782009-10-12 13:26:31 -0700708
Ying Xue1b784142015-03-02 15:37:48 +0800709static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
710 size_t size, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711{
Ying Xue1b784142015-03-02 15:37:48 +0800712 return sock->ops->recvmsg(sock, msg, size, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713}
714
Ying Xue1b784142015-03-02 15:37:48 +0800715int sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
716 int flags)
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -0700717{
718 int err = security_socket_recvmsg(sock, msg, size, flags);
719
Ying Xue1b784142015-03-02 15:37:48 +0800720 return err ?: sock_recvmsg_nosec(sock, msg, size, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700722EXPORT_SYMBOL(sock_recvmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Martin Lucinac1249c02010-12-10 00:04:05 +0000724/**
725 * kernel_recvmsg - Receive a message from a socket (kernel space)
726 * @sock: The socket to receive the message from
727 * @msg: Received message
728 * @vec: Input s/g array for message data
729 * @num: Size of input s/g array
730 * @size: Number of bytes to read
731 * @flags: Message flags (MSG_DONTWAIT, etc...)
732 *
733 * On return the msg structure contains the scatter/gather array passed in the
734 * vec argument. The array is modified so that it consists of the unfilled
735 * portion of the original array.
736 *
737 * The returned value is the total number of bytes received, or an error.
738 */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700739int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
740 struct kvec *vec, size_t num, size_t size, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741{
742 mm_segment_t oldfs = get_fs();
743 int result;
744
Al Viro6aa24812015-03-21 19:56:16 -0400745 iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 set_fs(KERNEL_DS);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 result = sock_recvmsg(sock, msg, size, flags);
748 set_fs(oldfs);
749 return result;
750}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700751EXPORT_SYMBOL(kernel_recvmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -0300753static ssize_t sock_sendpage(struct file *file, struct page *page,
754 int offset, size_t size, loff_t *ppos, int more)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755{
756 struct socket *sock;
757 int flags;
758
Eric Dumazetb69aee02005-09-06 14:42:45 -0700759 sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760
Eric Dumazet35f9c092012-04-05 03:05:35 +0000761 flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
762 /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */
763 flags |= more;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764
Linus Torvaldse6949582009-08-13 08:28:36 -0700765 return kernel_sendpage(sock, page, offset, size, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766}
767
Jens Axboe9c55e012007-11-06 23:30:13 -0800768static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700769 struct pipe_inode_info *pipe, size_t len,
Jens Axboe9c55e012007-11-06 23:30:13 -0800770 unsigned int flags)
771{
772 struct socket *sock = file->private_data;
773
Rémi Denis-Courmont997b37d2008-02-15 02:35:45 -0800774 if (unlikely(!sock->ops->splice_read))
775 return -EINVAL;
776
Jens Axboe9c55e012007-11-06 23:30:13 -0800777 return sock->ops->splice_read(sock, ppos, pipe, len, flags);
778}
779
Al Viro8ae5e032014-11-28 19:40:50 -0500780static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800781{
Al Viro6d652332015-01-30 16:12:56 -0500782 struct file *file = iocb->ki_filp;
783 struct socket *sock = file->private_data;
tadeusz.struk@intel.com0345f932015-03-19 12:31:25 -0700784 struct msghdr msg = {.msg_iter = *to,
785 .msg_iocb = iocb};
Al Viro8ae5e032014-11-28 19:40:50 -0500786 ssize_t res;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800787
Al Viro8ae5e032014-11-28 19:40:50 -0500788 if (file->f_flags & O_NONBLOCK)
789 msg.msg_flags = MSG_DONTWAIT;
790
791 if (iocb->ki_pos != 0)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800792 return -ESPIPE;
Badari Pulavarty027445c2006-09-30 23:28:46 -0700793
Christoph Hellwig66ee59a2015-02-11 19:56:46 +0100794 if (!iov_iter_count(to)) /* Match SYS5 behaviour */
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800795 return 0;
796
Al Viro237dae82015-04-09 00:00:30 -0400797 res = sock_recvmsg(sock, &msg, iov_iter_count(to), msg.msg_flags);
Al Viro8ae5e032014-11-28 19:40:50 -0500798 *to = msg.msg_iter;
799 return res;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800800}
801
Al Viro8ae5e032014-11-28 19:40:50 -0500802static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803{
Al Viro6d652332015-01-30 16:12:56 -0500804 struct file *file = iocb->ki_filp;
805 struct socket *sock = file->private_data;
tadeusz.struk@intel.com0345f932015-03-19 12:31:25 -0700806 struct msghdr msg = {.msg_iter = *from,
807 .msg_iocb = iocb};
Al Viro8ae5e032014-11-28 19:40:50 -0500808 ssize_t res;
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800809
Al Viro8ae5e032014-11-28 19:40:50 -0500810 if (iocb->ki_pos != 0)
Christoph Hellwigce1d4d32005-12-22 21:08:46 -0800811 return -ESPIPE;
Badari Pulavarty027445c2006-09-30 23:28:46 -0700812
Al Viro8ae5e032014-11-28 19:40:50 -0500813 if (file->f_flags & O_NONBLOCK)
814 msg.msg_flags = MSG_DONTWAIT;
815
Al Viro6d652332015-01-30 16:12:56 -0500816 if (sock->type == SOCK_SEQPACKET)
817 msg.msg_flags |= MSG_EOR;
818
Al Virod8725c82014-12-11 00:02:50 -0500819 res = sock_sendmsg(sock, &msg);
Al Viro8ae5e032014-11-28 19:40:50 -0500820 *from = msg.msg_iter;
821 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822}
823
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824/*
825 * Atomic setting of ioctl hooks to avoid race
826 * with module unload.
827 */
828
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800829static DEFINE_MUTEX(br_ioctl_mutex);
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700830static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
Eric W. Biederman881d9662007-09-17 11:56:21 -0700832void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800834 mutex_lock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 br_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800836 mutex_unlock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837}
838EXPORT_SYMBOL(brioctl_set);
839
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800840static DEFINE_MUTEX(vlan_ioctl_mutex);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700841static int (*vlan_ioctl_hook) (struct net *, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842
Eric W. Biederman881d9662007-09-17 11:56:21 -0700843void vlan_ioctl_set(int (*hook) (struct net *, void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800845 mutex_lock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 vlan_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800847 mutex_unlock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848}
849EXPORT_SYMBOL(vlan_ioctl_set);
850
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800851static DEFINE_MUTEX(dlci_ioctl_mutex);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700852static int (*dlci_ioctl_hook) (unsigned int, void __user *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700854void dlci_ioctl_set(int (*hook) (unsigned int, void __user *))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855{
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800856 mutex_lock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 dlci_ioctl_hook = hook;
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800858 mutex_unlock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859}
860EXPORT_SYMBOL(dlci_ioctl_set);
861
Arnd Bergmann6b960182009-11-06 23:10:54 -0800862static long sock_do_ioctl(struct net *net, struct socket *sock,
863 unsigned int cmd, unsigned long arg)
864{
865 int err;
866 void __user *argp = (void __user *)arg;
867
868 err = sock->ops->ioctl(sock, cmd, arg);
869
870 /*
871 * If this ioctl is unknown try to hand it down
872 * to the NIC driver.
873 */
874 if (err == -ENOIOCTLCMD)
875 err = dev_ioctl(net, cmd, argp);
876
877 return err;
878}
879
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880/*
881 * With an ioctl, arg may well be a user mode pointer, but we don't know
882 * what to do with it - that's up to the protocol still.
883 */
884
885static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
886{
887 struct socket *sock;
Eric W. Biederman881d9662007-09-17 11:56:21 -0700888 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 void __user *argp = (void __user *)arg;
890 int pid, err;
Eric W. Biederman881d9662007-09-17 11:56:21 -0700891 struct net *net;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892
Eric Dumazetb69aee02005-09-06 14:42:45 -0700893 sock = file->private_data;
Eric W. Biederman881d9662007-09-17 11:56:21 -0700894 sk = sock->sk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900895 net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
Eric W. Biederman881d9662007-09-17 11:56:21 -0700897 err = dev_ioctl(net, cmd, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898 } else
Johannes Berg3d23e342009-09-29 23:27:28 +0200899#ifdef CONFIG_WEXT_CORE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
Eric W. Biederman881d9662007-09-17 11:56:21 -0700901 err = dev_ioctl(net, cmd, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 } else
Johannes Berg3d23e342009-09-29 23:27:28 +0200903#endif
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700904 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 case FIOSETOWN:
906 case SIOCSPGRP:
907 err = -EFAULT;
908 if (get_user(pid, (int __user *)argp))
909 break;
Jeff Laytone0b93ed2014-08-22 11:27:32 -0400910 f_setown(sock->file, pid, 1);
911 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912 break;
913 case FIOGETOWN:
914 case SIOCGPGRP:
Eric W. Biederman609d7fa2006-10-02 02:17:15 -0700915 err = put_user(f_getown(sock->file),
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700916 (int __user *)argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 break;
918 case SIOCGIFBR:
919 case SIOCSIFBR:
920 case SIOCBRADDBR:
921 case SIOCBRDELBR:
922 err = -ENOPKG;
923 if (!br_ioctl_hook)
924 request_module("bridge");
925
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800926 mutex_lock(&br_ioctl_mutex);
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700927 if (br_ioctl_hook)
Eric W. Biederman881d9662007-09-17 11:56:21 -0700928 err = br_ioctl_hook(net, cmd, argp);
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800929 mutex_unlock(&br_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930 break;
931 case SIOCGIFVLAN:
932 case SIOCSIFVLAN:
933 err = -ENOPKG;
934 if (!vlan_ioctl_hook)
935 request_module("8021q");
936
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800937 mutex_lock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 if (vlan_ioctl_hook)
Eric W. Biederman881d9662007-09-17 11:56:21 -0700939 err = vlan_ioctl_hook(net, argp);
Arjan van de Ven4a3e2f72006-03-20 22:33:17 -0800940 mutex_unlock(&vlan_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 case SIOCADDDLCI:
943 case SIOCDELDLCI:
944 err = -ENOPKG;
945 if (!dlci_ioctl_hook)
946 request_module("dlci");
947
Pavel Emelyanov7512cbf2008-03-21 15:58:52 -0700948 mutex_lock(&dlci_ioctl_mutex);
949 if (dlci_ioctl_hook)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 err = dlci_ioctl_hook(cmd, argp);
Pavel Emelyanov7512cbf2008-03-21 15:58:52 -0700951 mutex_unlock(&dlci_ioctl_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 break;
953 default:
Arnd Bergmann6b960182009-11-06 23:10:54 -0800954 err = sock_do_ioctl(net, sock, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955 break;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700956 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 return err;
958}
959
960int sock_create_lite(int family, int type, int protocol, struct socket **res)
961{
962 int err;
963 struct socket *sock = NULL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700964
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965 err = security_socket_create(family, type, protocol, 1);
966 if (err)
967 goto out;
968
969 sock = sock_alloc();
970 if (!sock) {
971 err = -ENOMEM;
972 goto out;
973 }
974
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975 sock->type = type;
Venkat Yekkirala7420ed22006-08-04 23:17:57 -0700976 err = security_socket_post_create(sock, family, type, protocol, 1);
977 if (err)
978 goto out_release;
979
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980out:
981 *res = sock;
982 return err;
Venkat Yekkirala7420ed22006-08-04 23:17:57 -0700983out_release:
984 sock_release(sock);
985 sock = NULL;
986 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987}
Eric Dumazetc6d409c2010-06-03 20:03:40 -0700988EXPORT_SYMBOL(sock_create_lite);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
990/* No kernel lock held - perfect */
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700991static unsigned int sock_poll(struct file *file, poll_table *wait)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992{
Eliezer Tamircbf55002013-07-08 16:20:34 +0300993 unsigned int busy_flag = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 struct socket *sock;
995
996 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -0700997 * We can't return errors to poll, so it's either yes or no.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998 */
Eric Dumazetb69aee02005-09-06 14:42:45 -0700999 sock = file->private_data;
Eliezer Tamir2d48d672013-06-24 10:28:03 +03001000
Eliezer Tamircbf55002013-07-08 16:20:34 +03001001 if (sk_can_busy_loop(sock->sk)) {
Eliezer Tamir2d48d672013-06-24 10:28:03 +03001002 /* this socket can poll_ll so tell the system call */
Eliezer Tamircbf55002013-07-08 16:20:34 +03001003 busy_flag = POLL_BUSY_LOOP;
Eliezer Tamir2d48d672013-06-24 10:28:03 +03001004
1005 /* once, only if requested by syscall */
Eliezer Tamircbf55002013-07-08 16:20:34 +03001006 if (wait && (wait->_key & POLL_BUSY_LOOP))
1007 sk_busy_loop(sock->sk, 1);
Eliezer Tamir2d48d672013-06-24 10:28:03 +03001008 }
1009
Eliezer Tamircbf55002013-07-08 16:20:34 +03001010 return busy_flag | sock->ops->poll(file, sock, wait);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011}
1012
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001013static int sock_mmap(struct file *file, struct vm_area_struct *vma)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001014{
Eric Dumazetb69aee02005-09-06 14:42:45 -07001015 struct socket *sock = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016
1017 return sock->ops->mmap(file, sock, vma);
1018}
1019
Arnaldo Carvalho de Melo20380732005-08-16 02:18:02 -03001020static int sock_close(struct inode *inode, struct file *filp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021{
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 sock_release(SOCKET_I(inode));
1023 return 0;
1024}
1025
1026/*
1027 * Update the socket async list
1028 *
1029 * Fasync_list locking strategy.
1030 *
1031 * 1. fasync_list is modified only under process context socket lock
1032 * i.e. under semaphore.
1033 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
Eric Dumazet989a2972010-04-14 09:55:35 +00001034 * or under socket lock
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 */
1036
1037static int sock_fasync(int fd, struct file *filp, int on)
1038{
Eric Dumazet989a2972010-04-14 09:55:35 +00001039 struct socket *sock = filp->private_data;
1040 struct sock *sk = sock->sk;
Eric Dumazeteaefd112011-02-18 03:26:36 +00001041 struct socket_wq *wq;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042
Eric Dumazet989a2972010-04-14 09:55:35 +00001043 if (sk == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045
1046 lock_sock(sk);
Eric Dumazeteaefd112011-02-18 03:26:36 +00001047 wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk));
1048 fasync_helper(fd, filp, on, &wq->fasync_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
Eric Dumazeteaefd112011-02-18 03:26:36 +00001050 if (!wq->fasync_list)
Eric Dumazet989a2972010-04-14 09:55:35 +00001051 sock_reset_flag(sk, SOCK_FASYNC);
Jonathan Corbet76398422009-02-01 14:26:59 -07001052 else
Eric Dumazetbcdce712009-10-06 17:28:29 -07001053 sock_set_flag(sk, SOCK_FASYNC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054
Eric Dumazet989a2972010-04-14 09:55:35 +00001055 release_sock(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 return 0;
1057}
1058
Eric Dumazet43815482010-04-29 11:01:49 +00001059/* This function may be called only under socket lock or callback_lock or rcu_lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060
1061int sock_wake_async(struct socket *sock, int how, int band)
1062{
Eric Dumazet43815482010-04-29 11:01:49 +00001063 struct socket_wq *wq;
1064
1065 if (!sock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 return -1;
Eric Dumazet43815482010-04-29 11:01:49 +00001067 rcu_read_lock();
1068 wq = rcu_dereference(sock->wq);
1069 if (!wq || !wq->fasync_list) {
1070 rcu_read_unlock();
1071 return -1;
1072 }
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001073 switch (how) {
Pavel Emelyanov8d8ad9d2007-11-26 20:10:50 +08001074 case SOCK_WAKE_WAITD:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
1076 break;
1077 goto call_kill;
Pavel Emelyanov8d8ad9d2007-11-26 20:10:50 +08001078 case SOCK_WAKE_SPACE:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
1080 break;
1081 /* fall through */
Pavel Emelyanov8d8ad9d2007-11-26 20:10:50 +08001082 case SOCK_WAKE_IO:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001083call_kill:
Eric Dumazet43815482010-04-29 11:01:49 +00001084 kill_fasync(&wq->fasync_list, SIGIO, band);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 break;
Pavel Emelyanov8d8ad9d2007-11-26 20:10:50 +08001086 case SOCK_WAKE_URG:
Eric Dumazet43815482010-04-29 11:01:49 +00001087 kill_fasync(&wq->fasync_list, SIGURG, band);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 }
Eric Dumazet43815482010-04-29 11:01:49 +00001089 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 return 0;
1091}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001092EXPORT_SYMBOL(sock_wake_async);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093
Pavel Emelyanov721db932010-09-29 16:06:32 +04001094int __sock_create(struct net *net, int family, int type, int protocol,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001095 struct socket **res, int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096{
1097 int err;
1098 struct socket *sock;
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001099 const struct net_proto_family *pf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100
1101 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001102 * Check protocol is in range
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 */
1104 if (family < 0 || family >= NPROTO)
1105 return -EAFNOSUPPORT;
1106 if (type < 0 || type >= SOCK_MAX)
1107 return -EINVAL;
1108
1109 /* Compatibility.
1110
1111 This uglymoron is moved from INET layer to here to avoid
1112 deadlock in module load.
1113 */
1114 if (family == PF_INET && type == SOCK_PACKET) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001115 static int warned;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 if (!warned) {
1117 warned = 1;
Yang Yingliang3410f222014-02-12 17:09:55 +08001118 pr_info("%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1119 current->comm);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 }
1121 family = PF_PACKET;
1122 }
1123
1124 err = security_socket_create(family, type, protocol, kern);
1125 if (err)
1126 return err;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001127
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001128 /*
1129 * Allocate the socket and allow the family to set things up. if
1130 * the protocol is 0, the family is instructed to select an appropriate
1131 * default.
1132 */
1133 sock = sock_alloc();
1134 if (!sock) {
Joe Perchese87cc472012-05-13 21:56:26 +00001135 net_warn_ratelimited("socket: no more sockets\n");
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001136 return -ENFILE; /* Not exactly a match, but its the
1137 closest posix thing */
1138 }
1139
1140 sock->type = type;
1141
Johannes Berg95a5afc2008-10-16 15:24:51 -07001142#ifdef CONFIG_MODULES
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001143 /* Attempt to load a protocol module if the find failed.
1144 *
1145 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 * requested real, full-featured networking support upon configuration.
1147 * Otherwise module support will break!
1148 */
Eric Dumazet190683a2010-11-10 10:50:44 +00001149 if (rcu_access_pointer(net_families[family]) == NULL)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001150 request_module("net-pf-%d", family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151#endif
1152
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001153 rcu_read_lock();
1154 pf = rcu_dereference(net_families[family]);
1155 err = -EAFNOSUPPORT;
1156 if (!pf)
1157 goto out_release;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001158
1159 /*
1160 * We will call the ->create function, that possibly is in a loadable
1161 * module, so we have to bump that loadable module refcnt first.
1162 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001163 if (!try_module_get(pf->owner))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 goto out_release;
1165
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001166 /* Now protected by module ref count */
1167 rcu_read_unlock();
1168
Eric Paris3f378b62009-11-05 22:18:14 -08001169 err = pf->create(net, sock, protocol, kern);
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001170 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 goto out_module_put;
Frank Filza79af592005-09-27 15:23:38 -07001172
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173 /*
1174 * Now to bump the refcnt of the [loadable] module that owns this
1175 * socket at sock_release time we decrement its refcnt.
1176 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001177 if (!try_module_get(sock->ops->owner))
1178 goto out_module_busy;
1179
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180 /*
1181 * Now that we're done with the ->create function, the [loadable]
1182 * module can have its refcnt decremented
1183 */
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001184 module_put(pf->owner);
Venkat Yekkirala7420ed22006-08-04 23:17:57 -07001185 err = security_socket_post_create(sock, family, type, protocol, kern);
1186 if (err)
Herbert Xu3b185522007-08-15 14:46:02 -07001187 goto out_sock_release;
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001188 *res = sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001189
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001190 return 0;
1191
1192out_module_busy:
1193 err = -EAFNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194out_module_put:
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001195 sock->ops = NULL;
1196 module_put(pf->owner);
1197out_sock_release:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 sock_release(sock);
Stephen Hemminger55737fd2006-09-01 00:23:39 -07001199 return err;
1200
1201out_release:
1202 rcu_read_unlock();
1203 goto out_sock_release;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204}
Pavel Emelyanov721db932010-09-29 16:06:32 +04001205EXPORT_SYMBOL(__sock_create);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206
1207int sock_create(int family, int type, int protocol, struct socket **res)
1208{
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -07001209 return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001211EXPORT_SYMBOL(sock_create);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212
Eric W. Biedermaneeb1bd52015-05-08 21:08:05 -05001213int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214{
Eric W. Biedermaneeb1bd52015-05-08 21:08:05 -05001215 return __sock_create(net, family, type, protocol, res, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001217EXPORT_SYMBOL(sock_create_kern);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001219SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001220{
1221 int retval;
1222 struct socket *sock;
Ulrich Dreppera677a032008-07-23 21:29:17 -07001223 int flags;
1224
Ulrich Dreppere38b36f2008-07-23 21:29:42 -07001225 /* Check the SOCK_* constants for consistency. */
1226 BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC);
1227 BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK);
1228 BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK);
1229 BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK);
1230
Ulrich Dreppera677a032008-07-23 21:29:17 -07001231 flags = type & ~SOCK_TYPE_MASK;
Ulrich Drepper77d27202008-07-23 21:29:35 -07001232 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
Ulrich Dreppera677a032008-07-23 21:29:17 -07001233 return -EINVAL;
1234 type &= SOCK_TYPE_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001236 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1237 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1238
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 retval = sock_create(family, type, protocol, &sock);
1240 if (retval < 0)
1241 goto out;
1242
Ulrich Drepper77d27202008-07-23 21:29:35 -07001243 retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 if (retval < 0)
1245 goto out_release;
1246
1247out:
1248 /* It may be already another descriptor 8) Not kernel problem. */
1249 return retval;
1250
1251out_release:
1252 sock_release(sock);
1253 return retval;
1254}
1255
1256/*
1257 * Create a pair of connected sockets.
1258 */
1259
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001260SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
1261 int __user *, usockvec)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262{
1263 struct socket *sock1, *sock2;
1264 int fd1, fd2, err;
Al Virodb349502007-02-07 01:48:00 -05001265 struct file *newfile1, *newfile2;
Ulrich Dreppera677a032008-07-23 21:29:17 -07001266 int flags;
1267
1268 flags = type & ~SOCK_TYPE_MASK;
Ulrich Drepper77d27202008-07-23 21:29:35 -07001269 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
Ulrich Dreppera677a032008-07-23 21:29:17 -07001270 return -EINVAL;
1271 type &= SOCK_TYPE_MASK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001273 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1274 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1275
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 /*
1277 * Obtain the first socket and check if the underlying protocol
1278 * supports the socketpair call.
1279 */
1280
1281 err = sock_create(family, type, protocol, &sock1);
1282 if (err < 0)
1283 goto out;
1284
1285 err = sock_create(family, type, protocol, &sock2);
1286 if (err < 0)
1287 goto out_release_1;
1288
1289 err = sock1->ops->socketpair(sock1, sock2);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001290 if (err < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 goto out_release_both;
1292
Al Viro28407632012-08-17 23:54:15 -04001293 fd1 = get_unused_fd_flags(flags);
David S. Millerbf3c23d2007-10-29 21:54:02 -07001294 if (unlikely(fd1 < 0)) {
1295 err = fd1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001296 goto out_release_both;
David S. Millerbf3c23d2007-10-29 21:54:02 -07001297 }
Yann Droneaudd73aa282013-12-09 22:42:20 +01001298
Al Viro28407632012-08-17 23:54:15 -04001299 fd2 = get_unused_fd_flags(flags);
Al Viro198de4d2009-08-05 19:29:23 +04001300 if (unlikely(fd2 < 0)) {
1301 err = fd2;
Yann Droneaudd73aa282013-12-09 22:42:20 +01001302 goto out_put_unused_1;
Al Viro28407632012-08-17 23:54:15 -04001303 }
1304
Linus Torvaldsaab174f2012-10-02 20:25:04 -07001305 newfile1 = sock_alloc_file(sock1, flags, NULL);
Viresh Kumarb5ffe632015-08-12 15:59:47 +05301306 if (IS_ERR(newfile1)) {
Al Viro28407632012-08-17 23:54:15 -04001307 err = PTR_ERR(newfile1);
Yann Droneaudd73aa282013-12-09 22:42:20 +01001308 goto out_put_unused_both;
Al Viro28407632012-08-17 23:54:15 -04001309 }
1310
Linus Torvaldsaab174f2012-10-02 20:25:04 -07001311 newfile2 = sock_alloc_file(sock2, flags, NULL);
Al Viro28407632012-08-17 23:54:15 -04001312 if (IS_ERR(newfile2)) {
1313 err = PTR_ERR(newfile2);
Yann Droneaudd73aa282013-12-09 22:42:20 +01001314 goto out_fput_1;
Al Virodb349502007-02-07 01:48:00 -05001315 }
1316
Yann Droneaudd73aa282013-12-09 22:42:20 +01001317 err = put_user(fd1, &usockvec[0]);
1318 if (err)
1319 goto out_fput_both;
1320
1321 err = put_user(fd2, &usockvec[1]);
1322 if (err)
1323 goto out_fput_both;
1324
Al Viro157cf642008-12-14 04:57:47 -05001325 audit_fd_pair(fd1, fd2);
Yann Droneaudd73aa282013-12-09 22:42:20 +01001326
Al Virodb349502007-02-07 01:48:00 -05001327 fd_install(fd1, newfile1);
1328 fd_install(fd2, newfile2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 /* fd1 and fd2 may be already another descriptors.
1330 * Not kernel problem.
1331 */
1332
Yann Droneaudd73aa282013-12-09 22:42:20 +01001333 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334
Yann Droneaudd73aa282013-12-09 22:42:20 +01001335out_fput_both:
1336 fput(newfile2);
1337 fput(newfile1);
1338 put_unused_fd(fd2);
1339 put_unused_fd(fd1);
1340 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341
Yann Droneaudd73aa282013-12-09 22:42:20 +01001342out_fput_1:
1343 fput(newfile1);
1344 put_unused_fd(fd2);
1345 put_unused_fd(fd1);
1346 sock_release(sock2);
1347 goto out;
1348
1349out_put_unused_both:
1350 put_unused_fd(fd2);
1351out_put_unused_1:
1352 put_unused_fd(fd1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353out_release_both:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001354 sock_release(sock2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001355out_release_1:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001356 sock_release(sock1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357out:
1358 return err;
1359}
1360
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361/*
1362 * Bind a name to a socket. Nothing much to do here since it's
1363 * the protocol's responsibility to handle the local address.
1364 *
1365 * We move the socket address to kernel space before we call
1366 * the protocol layer (having also checked the address is ok).
1367 */
1368
Heiko Carstens20f37032009-01-14 14:14:23 +01001369SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370{
1371 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001372 struct sockaddr_storage address;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001373 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001375 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Stephen Hemmingere71a4782007-04-10 20:10:33 -07001376 if (sock) {
Maciej Żenczykowski43db3622012-03-11 12:51:50 +00001377 err = move_addr_to_kernel(umyaddr, addrlen, &address);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001378 if (err >= 0) {
1379 err = security_socket_bind(sock,
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001380 (struct sockaddr *)&address,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001381 addrlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001382 if (!err)
1383 err = sock->ops->bind(sock,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001384 (struct sockaddr *)
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001385 &address, addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386 }
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001387 fput_light(sock->file, fput_needed);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001388 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389 return err;
1390}
1391
Linus Torvalds1da177e2005-04-16 15:20:36 -07001392/*
1393 * Perform a listen. Basically, we allow the protocol to do anything
1394 * necessary for a listen, and if that works, we mark the socket as
1395 * ready for listening.
1396 */
1397
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001398SYSCALL_DEFINE2(listen, int, fd, int, backlog)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399{
1400 struct socket *sock;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001401 int err, fput_needed;
Pavel Emelyanovb8e1f9b2007-12-08 00:12:33 -08001402 int somaxconn;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001403
1404 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1405 if (sock) {
Pavel Emelyanov8efa6e92008-03-31 19:41:14 -07001406 somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn;
Eric Dumazet95c96172012-04-15 05:58:06 +00001407 if ((unsigned int)backlog > somaxconn)
Pavel Emelyanovb8e1f9b2007-12-08 00:12:33 -08001408 backlog = somaxconn;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409
1410 err = security_socket_listen(sock, backlog);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001411 if (!err)
1412 err = sock->ops->listen(sock, backlog);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001414 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415 }
1416 return err;
1417}
1418
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419/*
1420 * For accept, we attempt to create a new socket, set up the link
1421 * with the client, wake up the client, then return the new
1422 * connected fd. We collect the address of the connector in kernel
1423 * space and move it to user at the very end. This is unclean because
1424 * we open the socket then return an error.
1425 *
1426 * 1003.1g adds the ability to recvmsg() to query connection pending
1427 * status to recvmsg. We need to add that support in a way thats
1428 * clean when we restucture accept also.
1429 */
1430
Heiko Carstens20f37032009-01-14 14:14:23 +01001431SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
1432 int __user *, upeer_addrlen, int, flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433{
1434 struct socket *sock, *newsock;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001435 struct file *newfile;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001436 int err, len, newfd, fput_needed;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001437 struct sockaddr_storage address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438
Ulrich Drepper77d27202008-07-23 21:29:35 -07001439 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001440 return -EINVAL;
1441
1442 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1443 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1444
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001445 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 if (!sock)
1447 goto out;
1448
1449 err = -ENFILE;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07001450 newsock = sock_alloc();
1451 if (!newsock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001452 goto out_put;
1453
1454 newsock->type = sock->type;
1455 newsock->ops = sock->ops;
1456
Linus Torvalds1da177e2005-04-16 15:20:36 -07001457 /*
1458 * We don't need try_module_get here, as the listening socket (sock)
1459 * has the protocol module (sock->ops->owner) held.
1460 */
1461 __module_get(newsock->ops->owner);
1462
Al Viro28407632012-08-17 23:54:15 -04001463 newfd = get_unused_fd_flags(flags);
David S. Miller39d8c1b2006-03-20 17:13:49 -08001464 if (unlikely(newfd < 0)) {
1465 err = newfd;
David S. Miller9a1875e2006-04-01 12:48:36 -08001466 sock_release(newsock);
1467 goto out_put;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001468 }
Linus Torvaldsaab174f2012-10-02 20:25:04 -07001469 newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name);
Viresh Kumarb5ffe632015-08-12 15:59:47 +05301470 if (IS_ERR(newfile)) {
Al Viro28407632012-08-17 23:54:15 -04001471 err = PTR_ERR(newfile);
1472 put_unused_fd(newfd);
1473 sock_release(newsock);
1474 goto out_put;
1475 }
David S. Miller39d8c1b2006-03-20 17:13:49 -08001476
Frank Filza79af592005-09-27 15:23:38 -07001477 err = security_socket_accept(sock, newsock);
1478 if (err)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001479 goto out_fd;
Frank Filza79af592005-09-27 15:23:38 -07001480
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481 err = sock->ops->accept(sock, newsock, sock->file->f_flags);
1482 if (err < 0)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001483 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484
1485 if (upeer_sockaddr) {
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001486 if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001487 &len, 2) < 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001488 err = -ECONNABORTED;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001489 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001490 }
Maciej Żenczykowski43db3622012-03-11 12:51:50 +00001491 err = move_addr_to_user(&address,
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001492 len, upeer_sockaddr, upeer_addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493 if (err < 0)
David S. Miller39d8c1b2006-03-20 17:13:49 -08001494 goto out_fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001495 }
1496
1497 /* File flags are not inherited via accept() unlike another OSes. */
1498
David S. Miller39d8c1b2006-03-20 17:13:49 -08001499 fd_install(newfd, newfile);
1500 err = newfd;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501
Linus Torvalds1da177e2005-04-16 15:20:36 -07001502out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001503 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001504out:
1505 return err;
David S. Miller39d8c1b2006-03-20 17:13:49 -08001506out_fd:
David S. Miller9606a212006-04-01 01:00:14 -08001507 fput(newfile);
David S. Miller39d8c1b2006-03-20 17:13:49 -08001508 put_unused_fd(newfd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509 goto out_put;
1510}
1511
Heiko Carstens20f37032009-01-14 14:14:23 +01001512SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr,
1513 int __user *, upeer_addrlen)
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001514{
Ulrich Drepperde11def2008-11-19 15:36:14 -08001515 return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0);
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07001516}
1517
Linus Torvalds1da177e2005-04-16 15:20:36 -07001518/*
1519 * Attempt to connect to a socket with the server address. The address
1520 * is in user space so we verify it is OK and move it to kernel space.
1521 *
1522 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1523 * break bindings
1524 *
1525 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1526 * other SEQPACKET protocols that take time to connect() as it doesn't
1527 * include the -EINPROGRESS status for such sockets.
1528 */
1529
Heiko Carstens20f37032009-01-14 14:14:23 +01001530SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
1531 int, addrlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532{
1533 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001534 struct sockaddr_storage address;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001535 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001536
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001537 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 if (!sock)
1539 goto out;
Maciej Żenczykowski43db3622012-03-11 12:51:50 +00001540 err = move_addr_to_kernel(uservaddr, addrlen, &address);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001541 if (err < 0)
1542 goto out_put;
1543
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001544 err =
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001545 security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546 if (err)
1547 goto out_put;
1548
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001549 err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550 sock->file->f_flags);
1551out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001552 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553out:
1554 return err;
1555}
1556
1557/*
1558 * Get the local address ('name') of a socket object. Move the obtained
1559 * name to user space.
1560 */
1561
Heiko Carstens20f37032009-01-14 14:14:23 +01001562SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
1563 int __user *, usockaddr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001564{
1565 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001566 struct sockaddr_storage address;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001567 int len, err, fput_needed;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001568
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001569 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 if (!sock)
1571 goto out;
1572
1573 err = security_socket_getsockname(sock);
1574 if (err)
1575 goto out_put;
1576
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001577 err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578 if (err)
1579 goto out_put;
Maciej Żenczykowski43db3622012-03-11 12:51:50 +00001580 err = move_addr_to_user(&address, len, usockaddr, usockaddr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581
1582out_put:
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001583 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584out:
1585 return err;
1586}
1587
1588/*
1589 * Get the remote address ('name') of a socket object. Move the obtained
1590 * name to user space.
1591 */
1592
Heiko Carstens20f37032009-01-14 14:14:23 +01001593SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr,
1594 int __user *, usockaddr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595{
1596 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001597 struct sockaddr_storage address;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001598 int len, err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001599
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001600 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1601 if (sock != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001602 err = security_socket_getpeername(sock);
1603 if (err) {
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001604 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001605 return err;
1606 }
1607
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001608 err =
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001609 sock->ops->getname(sock, (struct sockaddr *)&address, &len,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001610 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001611 if (!err)
Maciej Żenczykowski43db3622012-03-11 12:51:50 +00001612 err = move_addr_to_user(&address, len, usockaddr,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001613 usockaddr_len);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001614 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 }
1616 return err;
1617}
1618
1619/*
1620 * Send a datagram to a given address. We move the address into kernel
1621 * space and check the user space data area is readable before invoking
1622 * the protocol.
1623 */
1624
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001625SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
Eric Dumazet95c96172012-04-15 05:58:06 +00001626 unsigned int, flags, struct sockaddr __user *, addr,
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001627 int, addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628{
1629 struct socket *sock;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001630 struct sockaddr_storage address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001631 int err;
1632 struct msghdr msg;
1633 struct iovec iov;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001634 int fput_needed;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001635
Al Viro602bd0e2015-03-21 19:12:32 -04001636 err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter);
1637 if (unlikely(err))
1638 return err;
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001639 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1640 if (!sock)
David S. Miller4387ff72007-02-08 15:06:08 -08001641 goto out;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001642
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001643 msg.msg_name = NULL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001644 msg.msg_control = NULL;
1645 msg.msg_controllen = 0;
1646 msg.msg_namelen = 0;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001647 if (addr) {
Maciej Żenczykowski43db3622012-03-11 12:51:50 +00001648 err = move_addr_to_kernel(addr, addr_len, &address);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 if (err < 0)
1650 goto out_put;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001651 msg.msg_name = (struct sockaddr *)&address;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001652 msg.msg_namelen = addr_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 }
1654 if (sock->file->f_flags & O_NONBLOCK)
1655 flags |= MSG_DONTWAIT;
1656 msg.msg_flags = flags;
Al Virod8725c82014-12-11 00:02:50 -05001657 err = sock_sendmsg(sock, &msg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001658
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001659out_put:
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001660 fput_light(sock->file, fput_needed);
David S. Miller4387ff72007-02-08 15:06:08 -08001661out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001662 return err;
1663}
1664
1665/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001666 * Send a datagram down a socket.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 */
1668
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001669SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len,
Eric Dumazet95c96172012-04-15 05:58:06 +00001670 unsigned int, flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671{
1672 return sys_sendto(fd, buff, len, flags, NULL, 0);
1673}
1674
1675/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001676 * Receive a frame from the socket and optionally record the address of the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001677 * sender. We verify the buffers are writable and if needed move the
1678 * sender address from kernel to user space.
1679 */
1680
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001681SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
Eric Dumazet95c96172012-04-15 05:58:06 +00001682 unsigned int, flags, struct sockaddr __user *, addr,
Heiko Carstens3e0fa652009-01-14 14:14:24 +01001683 int __user *, addr_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684{
1685 struct socket *sock;
1686 struct iovec iov;
1687 struct msghdr msg;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001688 struct sockaddr_storage address;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001689 int err, err2;
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001690 int fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691
Al Viro602bd0e2015-03-21 19:12:32 -04001692 err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter);
1693 if (unlikely(err))
1694 return err;
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001695 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696 if (!sock)
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001697 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001698
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001699 msg.msg_control = NULL;
1700 msg.msg_controllen = 0;
Hannes Frederic Sowaf3d33422013-11-21 03:14:22 +01001701 /* Save some cycles and don't copy the address if not needed */
1702 msg.msg_name = addr ? (struct sockaddr *)&address : NULL;
1703 /* We assume all kernel code knows the size of sockaddr_storage */
1704 msg.msg_namelen = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001705 if (sock->file->f_flags & O_NONBLOCK)
1706 flags |= MSG_DONTWAIT;
Al Viro602bd0e2015-03-21 19:12:32 -04001707 err = sock_recvmsg(sock, &msg, iov_iter_count(&msg.msg_iter), flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001708
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001709 if (err >= 0 && addr != NULL) {
Maciej Żenczykowski43db3622012-03-11 12:51:50 +00001710 err2 = move_addr_to_user(&address,
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001711 msg.msg_namelen, addr, addr_len);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001712 if (err2 < 0)
1713 err = err2;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714 }
Pavel Emelyanovde0fa952007-11-14 16:01:43 -08001715
1716 fput_light(sock->file, fput_needed);
David S. Miller4387ff72007-02-08 15:06:08 -08001717out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001718 return err;
1719}
1720
1721/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001722 * Receive a datagram from a socket.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001723 */
1724
Jan Glauberb7c0ddf2014-04-16 09:32:48 +02001725SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size,
1726 unsigned int, flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727{
1728 return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
1729}
1730
1731/*
1732 * Set a socket option. Because we don't know the option lengths we have
1733 * to pass the user mode parameter for the protocols to sort out.
1734 */
1735
Heiko Carstens20f37032009-01-14 14:14:23 +01001736SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
1737 char __user *, optval, int, optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001738{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001739 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 struct socket *sock;
1741
1742 if (optlen < 0)
1743 return -EINVAL;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001744
1745 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1746 if (sock != NULL) {
1747 err = security_socket_setsockopt(sock, level, optname);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001748 if (err)
1749 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750
1751 if (level == SOL_SOCKET)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001752 err =
1753 sock_setsockopt(sock, level, optname, optval,
1754 optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001755 else
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001756 err =
1757 sock->ops->setsockopt(sock, level, optname, optval,
1758 optlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001759out_put:
1760 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761 }
1762 return err;
1763}
1764
1765/*
1766 * Get a socket option. Because we don't know the option lengths we have
1767 * to pass a user mode parameter for the protocols to sort out.
1768 */
1769
Heiko Carstens20f37032009-01-14 14:14:23 +01001770SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
1771 char __user *, optval, int __user *, optlen)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001772{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001773 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001774 struct socket *sock;
1775
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001776 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1777 if (sock != NULL) {
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001778 err = security_socket_getsockopt(sock, level, optname);
1779 if (err)
1780 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001781
1782 if (level == SOL_SOCKET)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001783 err =
1784 sock_getsockopt(sock, level, optname, optval,
1785 optlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786 else
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001787 err =
1788 sock->ops->getsockopt(sock, level, optname, optval,
1789 optlen);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001790out_put:
1791 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792 }
1793 return err;
1794}
1795
Linus Torvalds1da177e2005-04-16 15:20:36 -07001796/*
1797 * Shutdown a socket.
1798 */
1799
Heiko Carstens754fe8d2009-01-14 14:14:09 +01001800SYSCALL_DEFINE2(shutdown, int, fd, int, how)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001801{
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001802 int err, fput_needed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803 struct socket *sock;
1804
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001805 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1806 if (sock != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807 err = security_socket_shutdown(sock, how);
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001808 if (!err)
1809 err = sock->ops->shutdown(sock, how);
1810 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811 }
1812 return err;
1813}
1814
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001815/* A couple of helpful macros for getting the address of the 32/64 bit
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816 * fields which are the same type (int / unsigned) on our platforms.
1817 */
1818#define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1819#define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1820#define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1821
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00001822struct used_address {
1823 struct sockaddr_storage name;
1824 unsigned int name_len;
1825};
1826
Al Viroda184282015-03-21 19:29:06 -04001827static int copy_msghdr_from_user(struct msghdr *kmsg,
1828 struct user_msghdr __user *umsg,
1829 struct sockaddr __user **save_addr,
1830 struct iovec **iov)
Dan Carpenter1661bf32013-10-03 00:27:20 +03001831{
Al Viro08adb7d2014-11-10 20:23:13 -05001832 struct sockaddr __user *uaddr;
1833 struct iovec __user *uiov;
Al Viroc0371da2014-11-24 10:42:55 -05001834 size_t nr_segs;
Al Viro08adb7d2014-11-10 20:23:13 -05001835 ssize_t err;
1836
1837 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
1838 __get_user(uaddr, &umsg->msg_name) ||
1839 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
1840 __get_user(uiov, &umsg->msg_iov) ||
Al Viroc0371da2014-11-24 10:42:55 -05001841 __get_user(nr_segs, &umsg->msg_iovlen) ||
Al Viro08adb7d2014-11-10 20:23:13 -05001842 __get_user(kmsg->msg_control, &umsg->msg_control) ||
1843 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
1844 __get_user(kmsg->msg_flags, &umsg->msg_flags))
Dan Carpenter1661bf32013-10-03 00:27:20 +03001845 return -EFAULT;
Matthew Leachdbb490b2014-03-11 11:58:27 +00001846
Al Viro08adb7d2014-11-10 20:23:13 -05001847 if (!uaddr)
Ani Sinha6a2a2b32014-09-08 14:49:59 -07001848 kmsg->msg_namelen = 0;
1849
Matthew Leachdbb490b2014-03-11 11:58:27 +00001850 if (kmsg->msg_namelen < 0)
1851 return -EINVAL;
1852
Dan Carpenter1661bf32013-10-03 00:27:20 +03001853 if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
Dan Carpenterdb31c552013-11-27 15:40:21 +03001854 kmsg->msg_namelen = sizeof(struct sockaddr_storage);
Al Viro08adb7d2014-11-10 20:23:13 -05001855
1856 if (save_addr)
1857 *save_addr = uaddr;
1858
1859 if (uaddr && kmsg->msg_namelen) {
1860 if (!save_addr) {
1861 err = move_addr_to_kernel(uaddr, kmsg->msg_namelen,
1862 kmsg->msg_name);
1863 if (err < 0)
1864 return err;
1865 }
1866 } else {
1867 kmsg->msg_name = NULL;
1868 kmsg->msg_namelen = 0;
1869 }
1870
Al Viroc0371da2014-11-24 10:42:55 -05001871 if (nr_segs > UIO_MAXIOV)
Al Viro08adb7d2014-11-10 20:23:13 -05001872 return -EMSGSIZE;
1873
tadeusz.struk@intel.com0345f932015-03-19 12:31:25 -07001874 kmsg->msg_iocb = NULL;
1875
Al Viroda184282015-03-21 19:29:06 -04001876 return import_iovec(save_addr ? READ : WRITE, uiov, nr_segs,
1877 UIO_FASTIOV, iov, &kmsg->msg_iter);
Dan Carpenter1661bf32013-10-03 00:27:20 +03001878}
1879
Al Viro666547f2014-04-06 14:03:05 -04001880static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg,
Eric Dumazet95c96172012-04-15 05:58:06 +00001881 struct msghdr *msg_sys, unsigned int flags,
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00001882 struct used_address *used_address)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883{
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001884 struct compat_msghdr __user *msg_compat =
1885 (struct compat_msghdr __user *)msg;
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07001886 struct sockaddr_storage address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
Alex Williamsonb9d717a2005-09-26 14:28:02 -07001888 unsigned char ctl[sizeof(struct cmsghdr) + 20]
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001889 __attribute__ ((aligned(sizeof(__kernel_size_t))));
1890 /* 20 is size of ipv6_pktinfo */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001891 unsigned char *ctl_buf = ctl;
Al Virod8725c82014-12-11 00:02:50 -05001892 int ctl_len;
Al Viro08adb7d2014-11-10 20:23:13 -05001893 ssize_t err;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001894
Al Viro08adb7d2014-11-10 20:23:13 -05001895 msg_sys->msg_name = &address;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896
Al Viro08449322014-11-09 22:33:45 -05001897 if (MSG_CMSG_COMPAT & flags)
Al Viro08adb7d2014-11-10 20:23:13 -05001898 err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov);
Al Viro08449322014-11-09 22:33:45 -05001899 else
Al Viro08adb7d2014-11-10 20:23:13 -05001900 err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001901 if (err < 0)
Al Viroda184282015-03-21 19:29:06 -04001902 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001903
1904 err = -ENOBUFS;
1905
Anton Blanchard228e5482011-05-02 20:21:35 +00001906 if (msg_sys->msg_controllen > INT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001907 goto out_freeiov;
Anton Blanchard228e5482011-05-02 20:21:35 +00001908 ctl_len = msg_sys->msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909 if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001910 err =
Anton Blanchard228e5482011-05-02 20:21:35 +00001911 cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001912 sizeof(ctl));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001913 if (err)
1914 goto out_freeiov;
Anton Blanchard228e5482011-05-02 20:21:35 +00001915 ctl_buf = msg_sys->msg_control;
1916 ctl_len = msg_sys->msg_controllen;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001917 } else if (ctl_len) {
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001918 if (ctl_len > sizeof(ctl)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001919 ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001920 if (ctl_buf == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001921 goto out_freeiov;
1922 }
1923 err = -EFAULT;
1924 /*
Anton Blanchard228e5482011-05-02 20:21:35 +00001925 * Careful! Before this, msg_sys->msg_control contains a user pointer.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001926 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
1927 * checking falls down on this.
1928 */
Namhyung Kimfb8621b2010-09-07 03:55:00 +00001929 if (copy_from_user(ctl_buf,
Anton Blanchard228e5482011-05-02 20:21:35 +00001930 (void __user __force *)msg_sys->msg_control,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001931 ctl_len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001932 goto out_freectl;
Anton Blanchard228e5482011-05-02 20:21:35 +00001933 msg_sys->msg_control = ctl_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 }
Anton Blanchard228e5482011-05-02 20:21:35 +00001935 msg_sys->msg_flags = flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936
1937 if (sock->file->f_flags & O_NONBLOCK)
Anton Blanchard228e5482011-05-02 20:21:35 +00001938 msg_sys->msg_flags |= MSG_DONTWAIT;
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00001939 /*
1940 * If this is sendmmsg() and current destination address is same as
1941 * previously succeeded address, omit asking LSM's decision.
1942 * used_address->name_len is initialized to UINT_MAX so that the first
1943 * destination address never matches.
1944 */
Mathieu Desnoyersbc909d92011-08-24 19:45:03 -07001945 if (used_address && msg_sys->msg_name &&
1946 used_address->name_len == msg_sys->msg_namelen &&
1947 !memcmp(&used_address->name, msg_sys->msg_name,
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00001948 used_address->name_len)) {
Al Virod8725c82014-12-11 00:02:50 -05001949 err = sock_sendmsg_nosec(sock, msg_sys);
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00001950 goto out_freectl;
1951 }
Al Virod8725c82014-12-11 00:02:50 -05001952 err = sock_sendmsg(sock, msg_sys);
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00001953 /*
1954 * If this is sendmmsg() and sending to current destination address was
1955 * successful, remember it.
1956 */
1957 if (used_address && err >= 0) {
1958 used_address->name_len = msg_sys->msg_namelen;
Mathieu Desnoyersbc909d92011-08-24 19:45:03 -07001959 if (msg_sys->msg_name)
1960 memcpy(&used_address->name, msg_sys->msg_name,
1961 used_address->name_len);
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00001962 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001963
1964out_freectl:
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001965 if (ctl_buf != ctl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001966 sock_kfree_s(sock->sk, ctl_buf, ctl_len);
1967out_freeiov:
Al Viroda184282015-03-21 19:29:06 -04001968 kfree(iov);
Anton Blanchard228e5482011-05-02 20:21:35 +00001969 return err;
1970}
1971
1972/*
1973 * BSD sendmsg interface
1974 */
1975
Al Viro666547f2014-04-06 14:03:05 -04001976long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags)
Anton Blanchard228e5482011-05-02 20:21:35 +00001977{
1978 int fput_needed, err;
1979 struct msghdr msg_sys;
Andy Lutomirski1be374a2013-05-22 14:07:44 -07001980 struct socket *sock;
Anton Blanchard228e5482011-05-02 20:21:35 +00001981
Andy Lutomirski1be374a2013-05-22 14:07:44 -07001982 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Anton Blanchard228e5482011-05-02 20:21:35 +00001983 if (!sock)
1984 goto out;
1985
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00001986 err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL);
Anton Blanchard228e5482011-05-02 20:21:35 +00001987
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08001988 fput_light(sock->file, fput_needed);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07001989out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 return err;
1991}
1992
Al Viro666547f2014-04-06 14:03:05 -04001993SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags)
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00001994{
1995 if (flags & MSG_CMSG_COMPAT)
1996 return -EINVAL;
1997 return __sys_sendmsg(fd, msg, flags);
1998}
1999
Anton Blanchard228e5482011-05-02 20:21:35 +00002000/*
2001 * Linux sendmmsg interface
2002 */
2003
2004int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
2005 unsigned int flags)
2006{
2007 int fput_needed, err, datagrams;
2008 struct socket *sock;
2009 struct mmsghdr __user *entry;
2010 struct compat_mmsghdr __user *compat_entry;
2011 struct msghdr msg_sys;
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00002012 struct used_address used_address;
Anton Blanchard228e5482011-05-02 20:21:35 +00002013
Anton Blanchard98382f42011-08-04 14:07:39 +00002014 if (vlen > UIO_MAXIOV)
2015 vlen = UIO_MAXIOV;
Anton Blanchard228e5482011-05-02 20:21:35 +00002016
2017 datagrams = 0;
2018
2019 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2020 if (!sock)
2021 return err;
2022
Tetsuo Handac71d8eb2011-08-04 14:07:40 +00002023 used_address.name_len = UINT_MAX;
Anton Blanchard228e5482011-05-02 20:21:35 +00002024 entry = mmsg;
2025 compat_entry = (struct compat_mmsghdr __user *)mmsg;
Anton Blanchard728ffb82011-08-04 14:07:38 +00002026 err = 0;
Anton Blanchard228e5482011-05-02 20:21:35 +00002027
2028 while (datagrams < vlen) {
Anton Blanchard228e5482011-05-02 20:21:35 +00002029 if (MSG_CMSG_COMPAT & flags) {
Al Viro666547f2014-04-06 14:03:05 -04002030 err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry,
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00002031 &msg_sys, flags, &used_address);
Anton Blanchard228e5482011-05-02 20:21:35 +00002032 if (err < 0)
2033 break;
2034 err = __put_user(err, &compat_entry->msg_len);
2035 ++compat_entry;
2036 } else {
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00002037 err = ___sys_sendmsg(sock,
Al Viro666547f2014-04-06 14:03:05 -04002038 (struct user_msghdr __user *)entry,
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00002039 &msg_sys, flags, &used_address);
Anton Blanchard228e5482011-05-02 20:21:35 +00002040 if (err < 0)
2041 break;
2042 err = put_user(err, &entry->msg_len);
2043 ++entry;
2044 }
2045
2046 if (err)
2047 break;
2048 ++datagrams;
2049 }
2050
Anton Blanchard228e5482011-05-02 20:21:35 +00002051 fput_light(sock->file, fput_needed);
2052
Anton Blanchard728ffb82011-08-04 14:07:38 +00002053 /* We only return an error if no datagrams were able to be sent */
2054 if (datagrams != 0)
Anton Blanchard228e5482011-05-02 20:21:35 +00002055 return datagrams;
2056
Anton Blanchard228e5482011-05-02 20:21:35 +00002057 return err;
2058}
2059
2060SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg,
2061 unsigned int, vlen, unsigned int, flags)
2062{
Andy Lutomirski1be374a2013-05-22 14:07:44 -07002063 if (flags & MSG_CMSG_COMPAT)
2064 return -EINVAL;
Anton Blanchard228e5482011-05-02 20:21:35 +00002065 return __sys_sendmmsg(fd, mmsg, vlen, flags);
2066}
2067
Al Viro666547f2014-04-06 14:03:05 -04002068static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg,
Eric Dumazet95c96172012-04-15 05:58:06 +00002069 struct msghdr *msg_sys, unsigned int flags, int nosec)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002070{
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002071 struct compat_msghdr __user *msg_compat =
2072 (struct compat_msghdr __user *)msg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002073 struct iovec iovstack[UIO_FASTIOV];
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002074 struct iovec *iov = iovstack;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075 unsigned long cmsg_ptr;
Al Viro08adb7d2014-11-10 20:23:13 -05002076 int total_len, len;
2077 ssize_t err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002078
2079 /* kernel mode address */
YOSHIFUJI Hideaki230b1832008-07-19 22:35:47 -07002080 struct sockaddr_storage addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002081
2082 /* user mode address pointers */
2083 struct sockaddr __user *uaddr;
Al Viro08adb7d2014-11-10 20:23:13 -05002084 int __user *uaddr_len = COMPAT_NAMELEN(msg);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002085
Al Viro08adb7d2014-11-10 20:23:13 -05002086 msg_sys->msg_name = &addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002087
Hannes Frederic Sowaf3d33422013-11-21 03:14:22 +01002088 if (MSG_CMSG_COMPAT & flags)
Al Viro08adb7d2014-11-10 20:23:13 -05002089 err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov);
Hannes Frederic Sowaf3d33422013-11-21 03:14:22 +01002090 else
Al Viro08adb7d2014-11-10 20:23:13 -05002091 err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002092 if (err < 0)
Al Viroda184282015-03-21 19:29:06 -04002093 return err;
2094 total_len = iov_iter_count(&msg_sys->msg_iter);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002095
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002096 cmsg_ptr = (unsigned long)msg_sys->msg_control;
2097 msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002098
Hannes Frederic Sowaf3d33422013-11-21 03:14:22 +01002099 /* We assume all kernel code knows the size of sockaddr_storage */
2100 msg_sys->msg_namelen = 0;
2101
Linus Torvalds1da177e2005-04-16 15:20:36 -07002102 if (sock->file->f_flags & O_NONBLOCK)
2103 flags |= MSG_DONTWAIT;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002104 err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
2105 total_len, flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002106 if (err < 0)
2107 goto out_freeiov;
2108 len = err;
2109
2110 if (uaddr != NULL) {
Maciej Żenczykowski43db3622012-03-11 12:51:50 +00002111 err = move_addr_to_user(&addr,
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002112 msg_sys->msg_namelen, uaddr,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002113 uaddr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002114 if (err < 0)
2115 goto out_freeiov;
2116 }
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002117 err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
David S. Miller37f7f422005-09-16 16:51:01 -07002118 COMPAT_FLAGS(msg));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119 if (err)
2120 goto out_freeiov;
2121 if (MSG_CMSG_COMPAT & flags)
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002122 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002123 &msg_compat->msg_controllen);
2124 else
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002125 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07002126 &msg->msg_controllen);
2127 if (err)
2128 goto out_freeiov;
2129 err = len;
2130
2131out_freeiov:
Al Viroda184282015-03-21 19:29:06 -04002132 kfree(iov);
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002133 return err;
2134}
2135
2136/*
2137 * BSD recvmsg interface
2138 */
2139
Al Viro666547f2014-04-06 14:03:05 -04002140long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags)
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002141{
2142 int fput_needed, err;
2143 struct msghdr msg_sys;
Andy Lutomirski1be374a2013-05-22 14:07:44 -07002144 struct socket *sock;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002145
Andy Lutomirski1be374a2013-05-22 14:07:44 -07002146 sock = sockfd_lookup_light(fd, &err, &fput_needed);
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002147 if (!sock)
2148 goto out;
2149
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00002150 err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0);
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002151
Benjamin LaHaise6cb153c2006-03-20 22:27:12 -08002152 fput_light(sock->file, fput_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002153out:
2154 return err;
2155}
2156
Al Viro666547f2014-04-06 14:03:05 -04002157SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg,
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00002158 unsigned int, flags)
2159{
2160 if (flags & MSG_CMSG_COMPAT)
2161 return -EINVAL;
2162 return __sys_recvmsg(fd, msg, flags);
2163}
2164
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002165/*
2166 * Linux recvmmsg interface
2167 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002169int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
2170 unsigned int flags, struct timespec *timeout)
2171{
2172 int fput_needed, err, datagrams;
2173 struct socket *sock;
2174 struct mmsghdr __user *entry;
Jean-Mickael Guerind7256d02009-12-01 08:47:26 +00002175 struct compat_mmsghdr __user *compat_entry;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002176 struct msghdr msg_sys;
2177 struct timespec end_time;
2178
2179 if (timeout &&
2180 poll_select_set_timeout(&end_time, timeout->tv_sec,
2181 timeout->tv_nsec))
2182 return -EINVAL;
2183
2184 datagrams = 0;
2185
2186 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2187 if (!sock)
2188 return err;
2189
2190 err = sock_error(sock->sk);
2191 if (err)
2192 goto out_put;
2193
2194 entry = mmsg;
Jean-Mickael Guerind7256d02009-12-01 08:47:26 +00002195 compat_entry = (struct compat_mmsghdr __user *)mmsg;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002196
2197 while (datagrams < vlen) {
2198 /*
2199 * No need to ask LSM for more than the first datagram.
2200 */
Jean-Mickael Guerind7256d02009-12-01 08:47:26 +00002201 if (MSG_CMSG_COMPAT & flags) {
Al Viro666547f2014-04-06 14:03:05 -04002202 err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry,
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00002203 &msg_sys, flags & ~MSG_WAITFORONE,
2204 datagrams);
Jean-Mickael Guerind7256d02009-12-01 08:47:26 +00002205 if (err < 0)
2206 break;
2207 err = __put_user(err, &compat_entry->msg_len);
2208 ++compat_entry;
2209 } else {
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00002210 err = ___sys_recvmsg(sock,
Al Viro666547f2014-04-06 14:03:05 -04002211 (struct user_msghdr __user *)entry,
Andy Lutomirskia7526eb2013-06-05 19:38:26 +00002212 &msg_sys, flags & ~MSG_WAITFORONE,
2213 datagrams);
Jean-Mickael Guerind7256d02009-12-01 08:47:26 +00002214 if (err < 0)
2215 break;
2216 err = put_user(err, &entry->msg_len);
2217 ++entry;
2218 }
2219
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002220 if (err)
2221 break;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002222 ++datagrams;
2223
Brandon L Black71c5c152010-03-26 16:18:03 +00002224 /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
2225 if (flags & MSG_WAITFORONE)
2226 flags |= MSG_DONTWAIT;
2227
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002228 if (timeout) {
2229 ktime_get_ts(timeout);
2230 *timeout = timespec_sub(end_time, *timeout);
2231 if (timeout->tv_sec < 0) {
2232 timeout->tv_sec = timeout->tv_nsec = 0;
2233 break;
2234 }
2235
2236 /* Timeout, return less than vlen datagrams */
2237 if (timeout->tv_nsec == 0 && timeout->tv_sec == 0)
2238 break;
2239 }
2240
2241 /* Out of band data, return right away */
2242 if (msg_sys.msg_flags & MSG_OOB)
2243 break;
2244 }
2245
2246out_put:
2247 fput_light(sock->file, fput_needed);
2248
2249 if (err == 0)
2250 return datagrams;
2251
2252 if (datagrams != 0) {
2253 /*
2254 * We may return less entries than requested (vlen) if the
2255 * sock is non block and there aren't enough datagrams...
2256 */
2257 if (err != -EAGAIN) {
2258 /*
2259 * ... or if recvmsg returns an error after we
2260 * received some datagrams, where we record the
2261 * error to return on the next call or if the
2262 * app asks about it using getsockopt(SO_ERROR).
2263 */
2264 sock->sk->sk_err = -err;
2265 }
2266
2267 return datagrams;
2268 }
2269
2270 return err;
2271}
2272
2273SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,
2274 unsigned int, vlen, unsigned int, flags,
2275 struct timespec __user *, timeout)
2276{
2277 int datagrams;
2278 struct timespec timeout_sys;
2279
Andy Lutomirski1be374a2013-05-22 14:07:44 -07002280 if (flags & MSG_CMSG_COMPAT)
2281 return -EINVAL;
2282
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002283 if (!timeout)
2284 return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL);
2285
2286 if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys)))
2287 return -EFAULT;
2288
2289 datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys);
2290
2291 if (datagrams > 0 &&
2292 copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys)))
2293 datagrams = -EFAULT;
2294
2295 return datagrams;
2296}
2297
2298#ifdef __ARCH_WANT_SYS_SOCKETCALL
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299/* Argument list sizes for sys_socketcall */
2300#define AL(x) ((x) * sizeof(unsigned long))
Anton Blanchard228e5482011-05-02 20:21:35 +00002301static const unsigned char nargs[21] = {
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002302 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
2303 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
2304 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
Anton Blanchard228e5482011-05-02 20:21:35 +00002305 AL(4), AL(5), AL(4)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002306};
2307
Linus Torvalds1da177e2005-04-16 15:20:36 -07002308#undef AL
2309
2310/*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002311 * System call vectors.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002312 *
2313 * Argument checking cleaned up. Saved 20% in size.
2314 * This function doesn't need to set the kernel lock because
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002315 * it is set by the callees.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002316 */
2317
Heiko Carstens3e0fa652009-01-14 14:14:24 +01002318SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002319{
Chen Gang2950fa92013-04-07 16:55:23 +08002320 unsigned long a[AUDITSC_ARGS];
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002321 unsigned long a0, a1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002322 int err;
Arjan van de Ven47379052009-09-28 12:57:44 -07002323 unsigned int len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324
Anton Blanchard228e5482011-05-02 20:21:35 +00002325 if (call < 1 || call > SYS_SENDMMSG)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 return -EINVAL;
2327
Arjan van de Ven47379052009-09-28 12:57:44 -07002328 len = nargs[call];
2329 if (len > sizeof(a))
2330 return -EINVAL;
2331
Linus Torvalds1da177e2005-04-16 15:20:36 -07002332 /* copy_from_user should be SMP safe. */
Arjan van de Ven47379052009-09-28 12:57:44 -07002333 if (copy_from_user(a, args, len))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334 return -EFAULT;
David Woodhouse3ec3b2f2005-05-17 12:08:48 +01002335
Chen Gang2950fa92013-04-07 16:55:23 +08002336 err = audit_socketcall(nargs[call] / sizeof(unsigned long), a);
2337 if (err)
2338 return err;
David Woodhouse3ec3b2f2005-05-17 12:08:48 +01002339
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002340 a0 = a[0];
2341 a1 = a[1];
2342
2343 switch (call) {
2344 case SYS_SOCKET:
2345 err = sys_socket(a0, a1, a[2]);
2346 break;
2347 case SYS_BIND:
2348 err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
2349 break;
2350 case SYS_CONNECT:
2351 err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]);
2352 break;
2353 case SYS_LISTEN:
2354 err = sys_listen(a0, a1);
2355 break;
2356 case SYS_ACCEPT:
Ulrich Drepperde11def2008-11-19 15:36:14 -08002357 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2358 (int __user *)a[2], 0);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002359 break;
2360 case SYS_GETSOCKNAME:
2361 err =
2362 sys_getsockname(a0, (struct sockaddr __user *)a1,
2363 (int __user *)a[2]);
2364 break;
2365 case SYS_GETPEERNAME:
2366 err =
2367 sys_getpeername(a0, (struct sockaddr __user *)a1,
2368 (int __user *)a[2]);
2369 break;
2370 case SYS_SOCKETPAIR:
2371 err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]);
2372 break;
2373 case SYS_SEND:
2374 err = sys_send(a0, (void __user *)a1, a[2], a[3]);
2375 break;
2376 case SYS_SENDTO:
2377 err = sys_sendto(a0, (void __user *)a1, a[2], a[3],
2378 (struct sockaddr __user *)a[4], a[5]);
2379 break;
2380 case SYS_RECV:
2381 err = sys_recv(a0, (void __user *)a1, a[2], a[3]);
2382 break;
2383 case SYS_RECVFROM:
2384 err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
2385 (struct sockaddr __user *)a[4],
2386 (int __user *)a[5]);
2387 break;
2388 case SYS_SHUTDOWN:
2389 err = sys_shutdown(a0, a1);
2390 break;
2391 case SYS_SETSOCKOPT:
2392 err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]);
2393 break;
2394 case SYS_GETSOCKOPT:
2395 err =
2396 sys_getsockopt(a0, a1, a[2], (char __user *)a[3],
2397 (int __user *)a[4]);
2398 break;
2399 case SYS_SENDMSG:
Al Viro666547f2014-04-06 14:03:05 -04002400 err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002401 break;
Anton Blanchard228e5482011-05-02 20:21:35 +00002402 case SYS_SENDMMSG:
2403 err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]);
2404 break;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002405 case SYS_RECVMSG:
Al Viro666547f2014-04-06 14:03:05 -04002406 err = sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2]);
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002407 break;
Arnaldo Carvalho de Meloa2e27252009-10-12 23:40:10 -07002408 case SYS_RECVMMSG:
2409 err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3],
2410 (struct timespec __user *)a[4]);
2411 break;
Ulrich Drepperde11def2008-11-19 15:36:14 -08002412 case SYS_ACCEPT4:
2413 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2414 (int __user *)a[2], a[3]);
Ulrich Drepperaaca0bd2008-07-23 21:29:20 -07002415 break;
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002416 default:
2417 err = -EINVAL;
2418 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419 }
2420 return err;
2421}
2422
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002423#endif /* __ARCH_WANT_SYS_SOCKETCALL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002424
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002425/**
2426 * sock_register - add a socket protocol handler
2427 * @ops: description of protocol
2428 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002429 * This function is called by a protocol handler that wants to
2430 * advertise its address family, and have it linked into the
Masanari Iidae793c0f2014-09-04 23:44:36 +09002431 * socket interface. The value ops->family corresponds to the
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002432 * socket system call protocol family.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002433 */
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002434int sock_register(const struct net_proto_family *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002435{
2436 int err;
2437
2438 if (ops->family >= NPROTO) {
Yang Yingliang3410f222014-02-12 17:09:55 +08002439 pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002440 return -ENOBUFS;
2441 }
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002442
2443 spin_lock(&net_family_lock);
Eric Dumazet190683a2010-11-10 10:50:44 +00002444 if (rcu_dereference_protected(net_families[ops->family],
2445 lockdep_is_held(&net_family_lock)))
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002446 err = -EEXIST;
2447 else {
Eric Dumazetcf778b02012-01-12 04:41:32 +00002448 rcu_assign_pointer(net_families[ops->family], ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002449 err = 0;
2450 }
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002451 spin_unlock(&net_family_lock);
2452
Yang Yingliang3410f222014-02-12 17:09:55 +08002453 pr_info("NET: Registered protocol family %d\n", ops->family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002454 return err;
2455}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002456EXPORT_SYMBOL(sock_register);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002457
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002458/**
2459 * sock_unregister - remove a protocol handler
2460 * @family: protocol family to remove
2461 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07002462 * This function is called by a protocol handler that wants to
2463 * remove its address family, and have it unlinked from the
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002464 * new socket creation.
2465 *
2466 * If protocol handler is a module, then it can use module reference
2467 * counts to protect against new references. If protocol handler is not
2468 * a module then it needs to provide its own protection in
2469 * the ops->create routine.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002470 */
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002471void sock_unregister(int family)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002472{
Stephen Hemmingerf0fd27d2006-08-09 21:03:17 -07002473 BUG_ON(family < 0 || family >= NPROTO);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002474
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002475 spin_lock(&net_family_lock);
Stephen Hemmingera9b3cd72011-08-01 16:19:00 +00002476 RCU_INIT_POINTER(net_families[family], NULL);
Stephen Hemminger55737fd2006-09-01 00:23:39 -07002477 spin_unlock(&net_family_lock);
2478
2479 synchronize_rcu();
2480
Yang Yingliang3410f222014-02-12 17:09:55 +08002481 pr_info("NET: Unregistered protocol family %d\n", family);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002482}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002483EXPORT_SYMBOL(sock_unregister);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002484
Andi Kleen77d76ea2005-12-22 12:43:42 -08002485static int __init sock_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002486{
Nick Pigginb3e19d92011-01-07 17:50:11 +11002487 int err;
Eric W. Biederman2ca794e2012-04-19 13:20:32 +00002488 /*
2489 * Initialize the network sysctl infrastructure.
2490 */
2491 err = net_sysctl_init();
2492 if (err)
2493 goto out;
Nick Pigginb3e19d92011-01-07 17:50:11 +11002494
Linus Torvalds1da177e2005-04-16 15:20:36 -07002495 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002496 * Initialize skbuff SLAB cache
Linus Torvalds1da177e2005-04-16 15:20:36 -07002497 */
2498 skb_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07002499
2500 /*
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002501 * Initialize the protocols module.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002502 */
2503
2504 init_inodecache();
Nick Pigginb3e19d92011-01-07 17:50:11 +11002505
2506 err = register_filesystem(&sock_fs_type);
2507 if (err)
2508 goto out_fs;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509 sock_mnt = kern_mount(&sock_fs_type);
Nick Pigginb3e19d92011-01-07 17:50:11 +11002510 if (IS_ERR(sock_mnt)) {
2511 err = PTR_ERR(sock_mnt);
2512 goto out_mount;
2513 }
Andi Kleen77d76ea2005-12-22 12:43:42 -08002514
2515 /* The real protocol initialization is performed in later initcalls.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002516 */
2517
2518#ifdef CONFIG_NETFILTER
Pablo Neira Ayuso6d11cfd2013-05-22 22:42:36 +00002519 err = netfilter_init();
2520 if (err)
2521 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002522#endif
David S. Millercbeb3212005-12-22 12:58:55 -08002523
Daniel Borkmann408eccc2014-04-01 16:20:23 +02002524 ptp_classifier_init();
Richard Cochranc1f19b52010-07-17 08:49:36 +00002525
Nick Pigginb3e19d92011-01-07 17:50:11 +11002526out:
2527 return err;
2528
2529out_mount:
2530 unregister_filesystem(&sock_fs_type);
2531out_fs:
2532 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002533}
2534
Andi Kleen77d76ea2005-12-22 12:43:42 -08002535core_initcall(sock_init); /* early initcall */
2536
Linus Torvalds1da177e2005-04-16 15:20:36 -07002537#ifdef CONFIG_PROC_FS
2538void socket_seq_show(struct seq_file *seq)
2539{
2540 int cpu;
2541 int counter = 0;
2542
KAMEZAWA Hiroyuki6f912042006-04-10 22:52:50 -07002543 for_each_possible_cpu(cpu)
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002544 counter += per_cpu(sockets_in_use, cpu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002545
2546 /* It can be negative, by the way. 8) */
2547 if (counter < 0)
2548 counter = 0;
2549
2550 seq_printf(seq, "sockets: used %d\n", counter);
2551}
Stephen Hemminger89bddce2006-09-01 00:19:31 -07002552#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07002553
Shaun Pereira89bbfc92006-03-21 23:58:08 -08002554#ifdef CONFIG_COMPAT
Arnd Bergmann6b960182009-11-06 23:10:54 -08002555static int do_siocgstamp(struct net *net, struct socket *sock,
H. Peter Anvin644595f2012-02-19 17:51:59 -08002556 unsigned int cmd, void __user *up)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002557{
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002558 mm_segment_t old_fs = get_fs();
2559 struct timeval ktv;
2560 int err;
2561
2562 set_fs(KERNEL_DS);
Arnd Bergmann6b960182009-11-06 23:10:54 -08002563 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002564 set_fs(old_fs);
H. Peter Anvin644595f2012-02-19 17:51:59 -08002565 if (!err)
Mikulas Patockaed6fe9d2012-09-01 12:34:07 -04002566 err = compat_put_timeval(&ktv, up);
H. Peter Anvin644595f2012-02-19 17:51:59 -08002567
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002568 return err;
2569}
2570
Arnd Bergmann6b960182009-11-06 23:10:54 -08002571static int do_siocgstampns(struct net *net, struct socket *sock,
H. Peter Anvin644595f2012-02-19 17:51:59 -08002572 unsigned int cmd, void __user *up)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002573{
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002574 mm_segment_t old_fs = get_fs();
2575 struct timespec kts;
2576 int err;
2577
2578 set_fs(KERNEL_DS);
Arnd Bergmann6b960182009-11-06 23:10:54 -08002579 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002580 set_fs(old_fs);
H. Peter Anvin644595f2012-02-19 17:51:59 -08002581 if (!err)
Mikulas Patockaed6fe9d2012-09-01 12:34:07 -04002582 err = compat_put_timespec(&kts, up);
H. Peter Anvin644595f2012-02-19 17:51:59 -08002583
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002584 return err;
2585}
2586
Arnd Bergmann6b960182009-11-06 23:10:54 -08002587static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002588{
2589 struct ifreq __user *uifr;
2590 int err;
2591
2592 uifr = compat_alloc_user_space(sizeof(struct ifreq));
Arnd Bergmann6b960182009-11-06 23:10:54 -08002593 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002594 return -EFAULT;
2595
Arnd Bergmann6b960182009-11-06 23:10:54 -08002596 err = dev_ioctl(net, SIOCGIFNAME, uifr);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002597 if (err)
2598 return err;
2599
Arnd Bergmann6b960182009-11-06 23:10:54 -08002600 if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq)))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002601 return -EFAULT;
2602
2603 return 0;
2604}
2605
Arnd Bergmann6b960182009-11-06 23:10:54 -08002606static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002607{
Arnd Bergmann6b960182009-11-06 23:10:54 -08002608 struct compat_ifconf ifc32;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002609 struct ifconf ifc;
2610 struct ifconf __user *uifc;
Arnd Bergmann6b960182009-11-06 23:10:54 -08002611 struct compat_ifreq __user *ifr32;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002612 struct ifreq __user *ifr;
2613 unsigned int i, j;
2614 int err;
2615
Arnd Bergmann6b960182009-11-06 23:10:54 -08002616 if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002617 return -EFAULT;
2618
Mathias Krause43da5f22012-08-15 11:31:57 +00002619 memset(&ifc, 0, sizeof(ifc));
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002620 if (ifc32.ifcbuf == 0) {
2621 ifc32.ifc_len = 0;
2622 ifc.ifc_len = 0;
2623 ifc.ifc_req = NULL;
2624 uifc = compat_alloc_user_space(sizeof(struct ifconf));
2625 } else {
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002626 size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) *
2627 sizeof(struct ifreq);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002628 uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
2629 ifc.ifc_len = len;
2630 ifr = ifc.ifc_req = (void __user *)(uifc + 1);
2631 ifr32 = compat_ptr(ifc32.ifcbuf);
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002632 for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) {
Arnd Bergmann6b960182009-11-06 23:10:54 -08002633 if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq)))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002634 return -EFAULT;
2635 ifr++;
2636 ifr32++;
2637 }
2638 }
2639 if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
2640 return -EFAULT;
2641
Arnd Bergmann6b960182009-11-06 23:10:54 -08002642 err = dev_ioctl(net, SIOCGIFCONF, uifc);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002643 if (err)
2644 return err;
2645
2646 if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
2647 return -EFAULT;
2648
2649 ifr = ifc.ifc_req;
2650 ifr32 = compat_ptr(ifc32.ifcbuf);
2651 for (i = 0, j = 0;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002652 i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len;
2653 i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) {
2654 if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq)))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002655 return -EFAULT;
2656 ifr32++;
2657 ifr++;
2658 }
2659
2660 if (ifc32.ifcbuf == 0) {
2661 /* Translate from 64-bit structure multiple to
2662 * a 32-bit one.
2663 */
2664 i = ifc.ifc_len;
Arnd Bergmann6b960182009-11-06 23:10:54 -08002665 i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq));
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002666 ifc32.ifc_len = i;
2667 } else {
2668 ifc32.ifc_len = i;
2669 }
Arnd Bergmann6b960182009-11-06 23:10:54 -08002670 if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002671 return -EFAULT;
2672
2673 return 0;
2674}
2675
Arnd Bergmann6b960182009-11-06 23:10:54 -08002676static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002677{
Ben Hutchings3a7da392011-03-17 07:34:32 +00002678 struct compat_ethtool_rxnfc __user *compat_rxnfc;
2679 bool convert_in = false, convert_out = false;
2680 size_t buf_size = ALIGN(sizeof(struct ifreq), 8);
2681 struct ethtool_rxnfc __user *rxnfc;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002682 struct ifreq __user *ifr;
Ben Hutchings3a7da392011-03-17 07:34:32 +00002683 u32 rule_cnt = 0, actual_rule_cnt;
2684 u32 ethcmd;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002685 u32 data;
Ben Hutchings3a7da392011-03-17 07:34:32 +00002686 int ret;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002687
2688 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2689 return -EFAULT;
2690
Ben Hutchings3a7da392011-03-17 07:34:32 +00002691 compat_rxnfc = compat_ptr(data);
2692
2693 if (get_user(ethcmd, &compat_rxnfc->cmd))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002694 return -EFAULT;
2695
Ben Hutchings3a7da392011-03-17 07:34:32 +00002696 /* Most ethtool structures are defined without padding.
2697 * Unfortunately struct ethtool_rxnfc is an exception.
2698 */
2699 switch (ethcmd) {
2700 default:
2701 break;
2702 case ETHTOOL_GRXCLSRLALL:
2703 /* Buffer size is variable */
2704 if (get_user(rule_cnt, &compat_rxnfc->rule_cnt))
2705 return -EFAULT;
2706 if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32))
2707 return -ENOMEM;
2708 buf_size += rule_cnt * sizeof(u32);
2709 /* fall through */
2710 case ETHTOOL_GRXRINGS:
2711 case ETHTOOL_GRXCLSRLCNT:
2712 case ETHTOOL_GRXCLSRULE:
Ben Hutchings55664f32012-01-03 12:04:51 +00002713 case ETHTOOL_SRXCLSRLINS:
Ben Hutchings3a7da392011-03-17 07:34:32 +00002714 convert_out = true;
2715 /* fall through */
2716 case ETHTOOL_SRXCLSRLDEL:
Ben Hutchings3a7da392011-03-17 07:34:32 +00002717 buf_size += sizeof(struct ethtool_rxnfc);
2718 convert_in = true;
2719 break;
2720 }
2721
2722 ifr = compat_alloc_user_space(buf_size);
Stephen Hemminger954b1242013-02-11 06:22:28 +00002723 rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8);
Ben Hutchings3a7da392011-03-17 07:34:32 +00002724
2725 if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2726 return -EFAULT;
2727
2728 if (put_user(convert_in ? rxnfc : compat_ptr(data),
2729 &ifr->ifr_ifru.ifru_data))
2730 return -EFAULT;
2731
2732 if (convert_in) {
Alexander Duyck127fe532011-04-08 18:01:59 +00002733 /* We expect there to be holes between fs.m_ext and
Ben Hutchings3a7da392011-03-17 07:34:32 +00002734 * fs.ring_cookie and at the end of fs, but nowhere else.
2735 */
Alexander Duyck127fe532011-04-08 18:01:59 +00002736 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) +
2737 sizeof(compat_rxnfc->fs.m_ext) !=
2738 offsetof(struct ethtool_rxnfc, fs.m_ext) +
2739 sizeof(rxnfc->fs.m_ext));
Ben Hutchings3a7da392011-03-17 07:34:32 +00002740 BUILD_BUG_ON(
2741 offsetof(struct compat_ethtool_rxnfc, fs.location) -
2742 offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) !=
2743 offsetof(struct ethtool_rxnfc, fs.location) -
2744 offsetof(struct ethtool_rxnfc, fs.ring_cookie));
2745
2746 if (copy_in_user(rxnfc, compat_rxnfc,
Stephen Hemminger954b1242013-02-11 06:22:28 +00002747 (void __user *)(&rxnfc->fs.m_ext + 1) -
2748 (void __user *)rxnfc) ||
Ben Hutchings3a7da392011-03-17 07:34:32 +00002749 copy_in_user(&rxnfc->fs.ring_cookie,
2750 &compat_rxnfc->fs.ring_cookie,
Stephen Hemminger954b1242013-02-11 06:22:28 +00002751 (void __user *)(&rxnfc->fs.location + 1) -
2752 (void __user *)&rxnfc->fs.ring_cookie) ||
Ben Hutchings3a7da392011-03-17 07:34:32 +00002753 copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt,
2754 sizeof(rxnfc->rule_cnt)))
2755 return -EFAULT;
2756 }
2757
2758 ret = dev_ioctl(net, SIOCETHTOOL, ifr);
2759 if (ret)
2760 return ret;
2761
2762 if (convert_out) {
2763 if (copy_in_user(compat_rxnfc, rxnfc,
Stephen Hemminger954b1242013-02-11 06:22:28 +00002764 (const void __user *)(&rxnfc->fs.m_ext + 1) -
2765 (const void __user *)rxnfc) ||
Ben Hutchings3a7da392011-03-17 07:34:32 +00002766 copy_in_user(&compat_rxnfc->fs.ring_cookie,
2767 &rxnfc->fs.ring_cookie,
Stephen Hemminger954b1242013-02-11 06:22:28 +00002768 (const void __user *)(&rxnfc->fs.location + 1) -
2769 (const void __user *)&rxnfc->fs.ring_cookie) ||
Ben Hutchings3a7da392011-03-17 07:34:32 +00002770 copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt,
2771 sizeof(rxnfc->rule_cnt)))
2772 return -EFAULT;
2773
2774 if (ethcmd == ETHTOOL_GRXCLSRLALL) {
2775 /* As an optimisation, we only copy the actual
2776 * number of rules that the underlying
2777 * function returned. Since Mallory might
2778 * change the rule count in user memory, we
2779 * check that it is less than the rule count
2780 * originally given (as the user buffer size),
2781 * which has been range-checked.
2782 */
2783 if (get_user(actual_rule_cnt, &rxnfc->rule_cnt))
2784 return -EFAULT;
2785 if (actual_rule_cnt < rule_cnt)
2786 rule_cnt = actual_rule_cnt;
2787 if (copy_in_user(&compat_rxnfc->rule_locs[0],
2788 &rxnfc->rule_locs[0],
2789 rule_cnt * sizeof(u32)))
2790 return -EFAULT;
2791 }
2792 }
2793
2794 return 0;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002795}
2796
Arnd Bergmann7a50a242009-11-08 20:57:03 -08002797static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
2798{
2799 void __user *uptr;
2800 compat_uptr_t uptr32;
2801 struct ifreq __user *uifr;
2802
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002803 uifr = compat_alloc_user_space(sizeof(*uifr));
Arnd Bergmann7a50a242009-11-08 20:57:03 -08002804 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2805 return -EFAULT;
2806
2807 if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
2808 return -EFAULT;
2809
2810 uptr = compat_ptr(uptr32);
2811
2812 if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc))
2813 return -EFAULT;
2814
2815 return dev_ioctl(net, SIOCWANDEV, uifr);
2816}
2817
Arnd Bergmann6b960182009-11-06 23:10:54 -08002818static int bond_ioctl(struct net *net, unsigned int cmd,
2819 struct compat_ifreq __user *ifr32)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002820{
2821 struct ifreq kifr;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002822 mm_segment_t old_fs;
2823 int err;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002824
2825 switch (cmd) {
2826 case SIOCBONDENSLAVE:
2827 case SIOCBONDRELEASE:
2828 case SIOCBONDSETHWADDR:
2829 case SIOCBONDCHANGEACTIVE:
Arnd Bergmann6b960182009-11-06 23:10:54 -08002830 if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq)))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002831 return -EFAULT;
2832
2833 old_fs = get_fs();
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002834 set_fs(KERNEL_DS);
stephen hemmingerc3f52ae2011-02-23 09:06:48 +00002835 err = dev_ioctl(net, cmd,
2836 (struct ifreq __user __force *) &kifr);
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002837 set_fs(old_fs);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002838
2839 return err;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002840 default:
Linus Torvalds07d106d2012-01-05 15:40:12 -08002841 return -ENOIOCTLCMD;
Joe Perchesccbd6a52010-05-14 10:58:26 +00002842 }
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002843}
2844
Ben Hutchings590d4692013-11-18 17:04:13 +00002845/* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */
2846static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd,
Arnd Bergmann6b960182009-11-06 23:10:54 -08002847 struct compat_ifreq __user *u_ifreq32)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002848{
2849 struct ifreq __user *u_ifreq64;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002850 char tmp_buf[IFNAMSIZ];
2851 void __user *data64;
2852 u32 data32;
2853
2854 if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
2855 IFNAMSIZ))
2856 return -EFAULT;
Ben Hutchings417c3522013-11-18 17:04:58 +00002857 if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002858 return -EFAULT;
2859 data64 = compat_ptr(data32);
2860
2861 u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
2862
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002863 if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
2864 IFNAMSIZ))
2865 return -EFAULT;
Ben Hutchings417c3522013-11-18 17:04:58 +00002866 if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002867 return -EFAULT;
2868
Arnd Bergmann6b960182009-11-06 23:10:54 -08002869 return dev_ioctl(net, cmd, u_ifreq64);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002870}
2871
Arnd Bergmann6b960182009-11-06 23:10:54 -08002872static int dev_ifsioc(struct net *net, struct socket *sock,
2873 unsigned int cmd, struct compat_ifreq __user *uifr32)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002874{
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002875 struct ifreq __user *uifr;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002876 int err;
2877
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002878 uifr = compat_alloc_user_space(sizeof(*uifr));
2879 if (copy_in_user(uifr, uifr32, sizeof(*uifr32)))
2880 return -EFAULT;
2881
2882 err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr);
2883
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002884 if (!err) {
2885 switch (cmd) {
2886 case SIOCGIFFLAGS:
2887 case SIOCGIFMETRIC:
2888 case SIOCGIFMTU:
2889 case SIOCGIFMEM:
2890 case SIOCGIFHWADDR:
2891 case SIOCGIFINDEX:
2892 case SIOCGIFADDR:
2893 case SIOCGIFBRDADDR:
2894 case SIOCGIFDSTADDR:
2895 case SIOCGIFNETMASK:
Arnd Bergmannfab25322009-11-08 20:56:21 -08002896 case SIOCGIFPFLAGS:
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002897 case SIOCGIFTXQLEN:
Arnd Bergmannfab25322009-11-08 20:56:21 -08002898 case SIOCGMIIPHY:
2899 case SIOCGMIIREG:
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002900 if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002901 err = -EFAULT;
2902 break;
2903 }
2904 }
2905 return err;
2906}
2907
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002908static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
2909 struct compat_ifreq __user *uifr32)
2910{
2911 struct ifreq ifr;
2912 struct compat_ifmap __user *uifmap32;
2913 mm_segment_t old_fs;
2914 int err;
2915
2916 uifmap32 = &uifr32->ifr_ifru.ifru_map;
2917 err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name));
Mathieu Desnoyers3ddc5b42013-09-11 14:23:18 -07002918 err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2919 err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2920 err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2921 err |= get_user(ifr.ifr_map.irq, &uifmap32->irq);
2922 err |= get_user(ifr.ifr_map.dma, &uifmap32->dma);
2923 err |= get_user(ifr.ifr_map.port, &uifmap32->port);
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002924 if (err)
2925 return -EFAULT;
2926
2927 old_fs = get_fs();
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002928 set_fs(KERNEL_DS);
stephen hemmingerc3f52ae2011-02-23 09:06:48 +00002929 err = dev_ioctl(net, cmd, (void __user __force *)&ifr);
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002930 set_fs(old_fs);
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002931
2932 if (cmd == SIOCGIFMAP && !err) {
2933 err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
Mathieu Desnoyers3ddc5b42013-09-11 14:23:18 -07002934 err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2935 err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2936 err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2937 err |= put_user(ifr.ifr_map.irq, &uifmap32->irq);
2938 err |= put_user(ifr.ifr_map.dma, &uifmap32->dma);
2939 err |= put_user(ifr.ifr_map.port, &uifmap32->port);
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00002940 if (err)
2941 err = -EFAULT;
2942 }
2943 return err;
2944}
2945
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002946struct rtentry32 {
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002947 u32 rt_pad1;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002948 struct sockaddr rt_dst; /* target address */
2949 struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */
2950 struct sockaddr rt_genmask; /* target network mask (IP) */
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002951 unsigned short rt_flags;
2952 short rt_pad2;
2953 u32 rt_pad3;
2954 unsigned char rt_tos;
2955 unsigned char rt_class;
2956 short rt_pad4;
2957 short rt_metric; /* +1 for binary compatibility! */
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002958 /* char * */ u32 rt_dev; /* forcing the device at add */
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002959 u32 rt_mtu; /* per route MTU/Window */
2960 u32 rt_window; /* Window clamping */
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002961 unsigned short rt_irtt; /* Initial RTT */
2962};
2963
2964struct in6_rtmsg32 {
2965 struct in6_addr rtmsg_dst;
2966 struct in6_addr rtmsg_src;
2967 struct in6_addr rtmsg_gateway;
2968 u32 rtmsg_type;
2969 u16 rtmsg_dst_len;
2970 u16 rtmsg_src_len;
2971 u32 rtmsg_metric;
2972 u32 rtmsg_info;
2973 u32 rtmsg_flags;
2974 s32 rtmsg_ifindex;
2975};
2976
Arnd Bergmann6b960182009-11-06 23:10:54 -08002977static int routing_ioctl(struct net *net, struct socket *sock,
2978 unsigned int cmd, void __user *argp)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002979{
2980 int ret;
2981 void *r = NULL;
2982 struct in6_rtmsg r6;
2983 struct rtentry r4;
2984 char devname[16];
2985 u32 rtdev;
2986 mm_segment_t old_fs = get_fs();
2987
Arnd Bergmann6b960182009-11-06 23:10:54 -08002988 if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */
2989 struct in6_rtmsg32 __user *ur6 = argp;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07002990 ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst),
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002991 3 * sizeof(struct in6_addr));
Mathieu Desnoyers3ddc5b42013-09-11 14:23:18 -07002992 ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type));
2993 ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len));
2994 ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len));
2995 ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric));
2996 ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info));
2997 ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags));
2998 ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex));
Arnd Bergmann7a2293872009-11-06 23:00:29 -08002999
3000 r = (void *) &r6;
3001 } else { /* ipv4 */
Arnd Bergmann6b960182009-11-06 23:10:54 -08003002 struct rtentry32 __user *ur4 = argp;
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003003 ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst),
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003004 3 * sizeof(struct sockaddr));
Mathieu Desnoyers3ddc5b42013-09-11 14:23:18 -07003005 ret |= get_user(r4.rt_flags, &(ur4->rt_flags));
3006 ret |= get_user(r4.rt_metric, &(ur4->rt_metric));
3007 ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu));
3008 ret |= get_user(r4.rt_window, &(ur4->rt_window));
3009 ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt));
3010 ret |= get_user(rtdev, &(ur4->rt_dev));
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003011 if (rtdev) {
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003012 ret |= copy_from_user(devname, compat_ptr(rtdev), 15);
stephen hemmingerc3f52ae2011-02-23 09:06:48 +00003013 r4.rt_dev = (char __user __force *)devname;
3014 devname[15] = 0;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003015 } else
3016 r4.rt_dev = NULL;
3017
3018 r = (void *) &r4;
3019 }
3020
3021 if (ret) {
3022 ret = -EFAULT;
3023 goto out;
3024 }
3025
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003026 set_fs(KERNEL_DS);
Arnd Bergmann6b960182009-11-06 23:10:54 -08003027 ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r);
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003028 set_fs(old_fs);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003029
3030out:
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003031 return ret;
3032}
3033
3034/* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
3035 * for some operations; this forces use of the newer bridge-utils that
Lucas De Marchi25985ed2011-03-30 22:57:33 -03003036 * use compatible ioctls
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003037 */
Arnd Bergmann6b960182009-11-06 23:10:54 -08003038static int old_bridge_ioctl(compat_ulong_t __user *argp)
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003039{
Arnd Bergmann6b960182009-11-06 23:10:54 -08003040 compat_ulong_t tmp;
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003041
Arnd Bergmann6b960182009-11-06 23:10:54 -08003042 if (get_user(tmp, argp))
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003043 return -EFAULT;
3044 if (tmp == BRCTL_GET_VERSION)
3045 return BRCTL_VERSION + 1;
3046 return -EINVAL;
3047}
3048
Arnd Bergmann6b960182009-11-06 23:10:54 -08003049static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
3050 unsigned int cmd, unsigned long arg)
3051{
3052 void __user *argp = compat_ptr(arg);
3053 struct sock *sk = sock->sk;
3054 struct net *net = sock_net(sk);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003055
Arnd Bergmann6b960182009-11-06 23:10:54 -08003056 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
Ben Hutchings590d4692013-11-18 17:04:13 +00003057 return compat_ifr_data_ioctl(net, cmd, argp);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003058
Arnd Bergmann6b960182009-11-06 23:10:54 -08003059 switch (cmd) {
3060 case SIOCSIFBR:
3061 case SIOCGIFBR:
3062 return old_bridge_ioctl(argp);
3063 case SIOCGIFNAME:
3064 return dev_ifname32(net, argp);
3065 case SIOCGIFCONF:
3066 return dev_ifconf(net, argp);
3067 case SIOCETHTOOL:
3068 return ethtool_ioctl(net, argp);
Arnd Bergmann7a50a242009-11-08 20:57:03 -08003069 case SIOCWANDEV:
3070 return compat_siocwandev(net, argp);
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00003071 case SIOCGIFMAP:
3072 case SIOCSIFMAP:
3073 return compat_sioc_ifmap(net, cmd, argp);
Arnd Bergmann6b960182009-11-06 23:10:54 -08003074 case SIOCBONDENSLAVE:
3075 case SIOCBONDRELEASE:
3076 case SIOCBONDSETHWADDR:
Arnd Bergmann6b960182009-11-06 23:10:54 -08003077 case SIOCBONDCHANGEACTIVE:
3078 return bond_ioctl(net, cmd, argp);
3079 case SIOCADDRT:
3080 case SIOCDELRT:
3081 return routing_ioctl(net, sock, cmd, argp);
3082 case SIOCGSTAMP:
3083 return do_siocgstamp(net, sock, cmd, argp);
3084 case SIOCGSTAMPNS:
3085 return do_siocgstampns(net, sock, cmd, argp);
Ben Hutchings590d4692013-11-18 17:04:13 +00003086 case SIOCBONDSLAVEINFOQUERY:
3087 case SIOCBONDINFOQUERY:
Arnd Bergmanna2116ed2009-11-11 03:39:40 +00003088 case SIOCSHWTSTAMP:
Ben Hutchingsfd468c72013-11-14 01:19:29 +00003089 case SIOCGHWTSTAMP:
Ben Hutchings590d4692013-11-18 17:04:13 +00003090 return compat_ifr_data_ioctl(net, cmd, argp);
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003091
Arnd Bergmann6b960182009-11-06 23:10:54 -08003092 case FIOSETOWN:
3093 case SIOCSPGRP:
3094 case FIOGETOWN:
3095 case SIOCGPGRP:
3096 case SIOCBRADDBR:
3097 case SIOCBRDELBR:
3098 case SIOCGIFVLAN:
3099 case SIOCSIFVLAN:
3100 case SIOCADDDLCI:
3101 case SIOCDELDLCI:
3102 return sock_ioctl(file, cmd, arg);
3103
3104 case SIOCGIFFLAGS:
3105 case SIOCSIFFLAGS:
3106 case SIOCGIFMETRIC:
3107 case SIOCSIFMETRIC:
3108 case SIOCGIFMTU:
3109 case SIOCSIFMTU:
3110 case SIOCGIFMEM:
3111 case SIOCSIFMEM:
3112 case SIOCGIFHWADDR:
3113 case SIOCSIFHWADDR:
3114 case SIOCADDMULTI:
3115 case SIOCDELMULTI:
3116 case SIOCGIFINDEX:
Arnd Bergmann6b960182009-11-06 23:10:54 -08003117 case SIOCGIFADDR:
3118 case SIOCSIFADDR:
3119 case SIOCSIFHWBROADCAST:
Arnd Bergmann6b960182009-11-06 23:10:54 -08003120 case SIOCDIFADDR:
Arnd Bergmann6b960182009-11-06 23:10:54 -08003121 case SIOCGIFBRDADDR:
3122 case SIOCSIFBRDADDR:
3123 case SIOCGIFDSTADDR:
3124 case SIOCSIFDSTADDR:
3125 case SIOCGIFNETMASK:
3126 case SIOCSIFNETMASK:
3127 case SIOCSIFPFLAGS:
3128 case SIOCGIFPFLAGS:
3129 case SIOCGIFTXQLEN:
3130 case SIOCSIFTXQLEN:
3131 case SIOCBRADDIF:
3132 case SIOCBRDELIF:
Arnd Bergmann9177efd2009-11-06 08:09:09 +00003133 case SIOCSIFNAME:
3134 case SIOCGMIIPHY:
3135 case SIOCGMIIREG:
3136 case SIOCSMIIREG:
Arnd Bergmann6b960182009-11-06 23:10:54 -08003137 return dev_ifsioc(net, sock, cmd, argp);
Arnd Bergmann9177efd2009-11-06 08:09:09 +00003138
Arnd Bergmann6b960182009-11-06 23:10:54 -08003139 case SIOCSARP:
3140 case SIOCGARP:
3141 case SIOCDARP:
Arnd Bergmann6b960182009-11-06 23:10:54 -08003142 case SIOCATMARK:
Arnd Bergmann9177efd2009-11-06 08:09:09 +00003143 return sock_do_ioctl(net, sock, cmd, arg);
3144 }
3145
Arnd Bergmann6b960182009-11-06 23:10:54 -08003146 return -ENOIOCTLCMD;
3147}
Arnd Bergmann7a2293872009-11-06 23:00:29 -08003148
Eric Dumazet95c96172012-04-15 05:58:06 +00003149static long compat_sock_ioctl(struct file *file, unsigned int cmd,
Stephen Hemminger89bddce2006-09-01 00:19:31 -07003150 unsigned long arg)
Shaun Pereira89bbfc92006-03-21 23:58:08 -08003151{
3152 struct socket *sock = file->private_data;
3153 int ret = -ENOIOCTLCMD;
David S. Miller87de87d2008-06-03 09:14:03 -07003154 struct sock *sk;
3155 struct net *net;
3156
3157 sk = sock->sk;
3158 net = sock_net(sk);
Shaun Pereira89bbfc92006-03-21 23:58:08 -08003159
3160 if (sock->ops->compat_ioctl)
3161 ret = sock->ops->compat_ioctl(sock, cmd, arg);
3162
David S. Miller87de87d2008-06-03 09:14:03 -07003163 if (ret == -ENOIOCTLCMD &&
3164 (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST))
3165 ret = compat_wext_handle_ioctl(net, cmd, arg);
3166
Arnd Bergmann6b960182009-11-06 23:10:54 -08003167 if (ret == -ENOIOCTLCMD)
3168 ret = compat_sock_ioctl_trans(file, sock, cmd, arg);
3169
Shaun Pereira89bbfc92006-03-21 23:58:08 -08003170 return ret;
3171}
3172#endif
3173
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003174int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
3175{
3176 return sock->ops->bind(sock, addr, addrlen);
3177}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003178EXPORT_SYMBOL(kernel_bind);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003179
3180int kernel_listen(struct socket *sock, int backlog)
3181{
3182 return sock->ops->listen(sock, backlog);
3183}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003184EXPORT_SYMBOL(kernel_listen);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003185
3186int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
3187{
3188 struct sock *sk = sock->sk;
3189 int err;
3190
3191 err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol,
3192 newsock);
3193 if (err < 0)
3194 goto done;
3195
3196 err = sock->ops->accept(sock, *newsock, flags);
3197 if (err < 0) {
3198 sock_release(*newsock);
Tony Battersbyfa8705b2007-10-10 21:09:04 -07003199 *newsock = NULL;
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003200 goto done;
3201 }
3202
3203 (*newsock)->ops = sock->ops;
Wei Yongjun1b085342008-12-18 19:35:10 -08003204 __module_get((*newsock)->ops->owner);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003205
3206done:
3207 return err;
3208}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003209EXPORT_SYMBOL(kernel_accept);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003210
3211int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
YOSHIFUJI Hideaki4768fbc2007-02-09 23:25:31 +09003212 int flags)
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003213{
3214 return sock->ops->connect(sock, addr, addrlen, flags);
3215}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003216EXPORT_SYMBOL(kernel_connect);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003217
3218int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
3219 int *addrlen)
3220{
3221 return sock->ops->getname(sock, addr, addrlen, 0);
3222}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003223EXPORT_SYMBOL(kernel_getsockname);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003224
3225int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
3226 int *addrlen)
3227{
3228 return sock->ops->getname(sock, addr, addrlen, 1);
3229}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003230EXPORT_SYMBOL(kernel_getpeername);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003231
3232int kernel_getsockopt(struct socket *sock, int level, int optname,
3233 char *optval, int *optlen)
3234{
3235 mm_segment_t oldfs = get_fs();
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003236 char __user *uoptval;
3237 int __user *uoptlen;
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003238 int err;
3239
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003240 uoptval = (char __user __force *) optval;
3241 uoptlen = (int __user __force *) optlen;
3242
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003243 set_fs(KERNEL_DS);
3244 if (level == SOL_SOCKET)
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003245 err = sock_getsockopt(sock, level, optname, uoptval, uoptlen);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003246 else
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003247 err = sock->ops->getsockopt(sock, level, optname, uoptval,
3248 uoptlen);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003249 set_fs(oldfs);
3250 return err;
3251}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003252EXPORT_SYMBOL(kernel_getsockopt);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003253
3254int kernel_setsockopt(struct socket *sock, int level, int optname,
David S. Millerb7058842009-09-30 16:12:20 -07003255 char *optval, unsigned int optlen)
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003256{
3257 mm_segment_t oldfs = get_fs();
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003258 char __user *uoptval;
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003259 int err;
3260
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003261 uoptval = (char __user __force *) optval;
3262
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003263 set_fs(KERNEL_DS);
3264 if (level == SOL_SOCKET)
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003265 err = sock_setsockopt(sock, level, optname, uoptval, optlen);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003266 else
Namhyung Kimfb8621b2010-09-07 03:55:00 +00003267 err = sock->ops->setsockopt(sock, level, optname, uoptval,
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003268 optlen);
3269 set_fs(oldfs);
3270 return err;
3271}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003272EXPORT_SYMBOL(kernel_setsockopt);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003273
3274int kernel_sendpage(struct socket *sock, struct page *page, int offset,
3275 size_t size, int flags)
3276{
3277 if (sock->ops->sendpage)
3278 return sock->ops->sendpage(sock, page, offset, size, flags);
3279
3280 return sock_no_sendpage(sock, page, offset, size, flags);
3281}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003282EXPORT_SYMBOL(kernel_sendpage);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003283
3284int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
3285{
3286 mm_segment_t oldfs = get_fs();
3287 int err;
3288
3289 set_fs(KERNEL_DS);
3290 err = sock->ops->ioctl(sock, cmd, arg);
3291 set_fs(oldfs);
3292
3293 return err;
3294}
Eric Dumazetc6d409c2010-06-03 20:03:40 -07003295EXPORT_SYMBOL(kernel_sock_ioctl);
Sridhar Samudralaac5a4882006-08-07 20:57:31 -07003296
Trond Myklebust91cf45f2007-11-12 18:10:39 -08003297int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
3298{
3299 return sock->ops->shutdown(sock, how);
3300}
Trond Myklebust91cf45f2007-11-12 18:10:39 -08003301EXPORT_SYMBOL(kernel_sock_shutdown);