2 * NET An implementation of the SOCKET network access protocol.
4 * Version: @(#)socket.c 1.1.93 18/02/95
6 * Authors: Orest Zborowski, <obz@Kodak.COM>
8 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 * Anonymous : NOTSOCK/BADF cleanup. Error fix in
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
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
23 * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style)
24 * Jeff Uphoff : Made max number of sockets command-line
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
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
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)
45 * Tigran Aivazian : Made listen(2) backlog sanity checks
46 * protocol-independent
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.
55 * This module is effectively the top level interface to the BSD socket
58 * Based upon Swansea University Computer Society NET3.039
62 #include <linux/socket.h>
63 #include <linux/file.h>
64 #include <linux/net.h>
65 #include <linux/interrupt.h>
66 #include <linux/thread_info.h>
67 #include <linux/rcupdate.h>
68 #include <linux/netdevice.h>
69 #include <linux/proc_fs.h>
70 #include <linux/seq_file.h>
71 #include <linux/mutex.h>
72 #include <linux/wanrouter.h>
73 #include <linux/if_bridge.h>
74 #include <linux/if_frad.h>
75 #include <linux/if_vlan.h>
76 #include <linux/init.h>
77 #include <linux/poll.h>
78 #include <linux/cache.h>
79 #include <linux/module.h>
80 #include <linux/highmem.h>
81 #include <linux/mount.h>
82 #include <linux/security.h>
83 #include <linux/syscalls.h>
84 #include <linux/compat.h>
85 #include <linux/kmod.h>
86 #include <linux/audit.h>
87 #include <linux/wireless.h>
88 #include <linux/nsproxy.h>
89 #include <linux/magic.h>
90 #include <linux/slab.h>
92 #include <asm/uaccess.h>
93 #include <asm/unistd.h>
95 #include <net/compat.h>
97 #include <net/cls_cgroup.h>
100 #include <linux/netfilter.h>
102 #include <linux/if_tun.h>
103 #include <linux/ipv6_route.h>
104 #include <linux/route.h>
105 #include <linux/sockios.h>
106 #include <linux/atalk.h>
108 static int sock_no_open(struct inode
*irrelevant
, struct file
*dontcare
);
109 static ssize_t
sock_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
110 unsigned long nr_segs
, loff_t pos
);
111 static ssize_t
sock_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
112 unsigned long nr_segs
, loff_t pos
);
113 static int sock_mmap(struct file
*file
, struct vm_area_struct
*vma
);
115 static int sock_close(struct inode
*inode
, struct file
*file
);
116 static unsigned int sock_poll(struct file
*file
,
117 struct poll_table_struct
*wait
);
118 static long sock_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
120 static long compat_sock_ioctl(struct file
*file
,
121 unsigned int cmd
, unsigned long arg
);
123 static int sock_fasync(int fd
, struct file
*filp
, int on
);
124 static ssize_t
sock_sendpage(struct file
*file
, struct page
*page
,
125 int offset
, size_t size
, loff_t
*ppos
, int more
);
126 static ssize_t
sock_splice_read(struct file
*file
, loff_t
*ppos
,
127 struct pipe_inode_info
*pipe
, size_t len
,
131 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
132 * in the operation structures but are done directly via the socketcall() multiplexor.
135 static const struct file_operations socket_file_ops
= {
136 .owner
= THIS_MODULE
,
138 .aio_read
= sock_aio_read
,
139 .aio_write
= sock_aio_write
,
141 .unlocked_ioctl
= sock_ioctl
,
143 .compat_ioctl
= compat_sock_ioctl
,
146 .open
= sock_no_open
, /* special open code to disallow open via /proc */
147 .release
= sock_close
,
148 .fasync
= sock_fasync
,
149 .sendpage
= sock_sendpage
,
150 .splice_write
= generic_splice_sendpage
,
151 .splice_read
= sock_splice_read
,
155 * The protocol list. Each protocol is registered in here.
158 static DEFINE_SPINLOCK(net_family_lock
);
159 static const struct net_proto_family
*net_families
[NPROTO
] __read_mostly
;
162 * Statistics counters of the socket lists
165 static DEFINE_PER_CPU(int, sockets_in_use
);
169 * Move socket addresses back and forth across the kernel/user
170 * divide and look after the messy bits.
173 #define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
174 16 for IP, 16 for IPX,
177 must be at least one bigger than
178 the AF_UNIX size (see net/unix/af_unix.c
183 * move_addr_to_kernel - copy a socket address into kernel space
184 * @uaddr: Address in user space
185 * @kaddr: Address in kernel space
186 * @ulen: Length in user space
188 * The address is copied into kernel space. If the provided address is
189 * too long an error code of -EINVAL is returned. If the copy gives
190 * invalid addresses -EFAULT is returned. On a success 0 is returned.
193 int move_addr_to_kernel(void __user
*uaddr
, int ulen
, struct sockaddr
*kaddr
)
195 if (ulen
< 0 || ulen
> sizeof(struct sockaddr_storage
))
199 if (copy_from_user(kaddr
, uaddr
, ulen
))
201 return audit_sockaddr(ulen
, kaddr
);
205 * move_addr_to_user - copy an address to user space
206 * @kaddr: kernel space address
207 * @klen: length of address in kernel
208 * @uaddr: user space address
209 * @ulen: pointer to user length field
211 * The value pointed to by ulen on entry is the buffer length available.
212 * This is overwritten with the buffer space used. -EINVAL is returned
213 * if an overlong buffer is specified or a negative buffer size. -EFAULT
214 * is returned if either the buffer or the length field are not
216 * After copying the data up to the limit the user specifies, the true
217 * length of the data is written over the length limit the user
218 * specified. Zero is returned for a success.
221 int move_addr_to_user(struct sockaddr
*kaddr
, int klen
, void __user
*uaddr
,
227 err
= get_user(len
, ulen
);
232 if (len
< 0 || len
> sizeof(struct sockaddr_storage
))
235 if (audit_sockaddr(klen
, kaddr
))
237 if (copy_to_user(uaddr
, kaddr
, len
))
241 * "fromlen shall refer to the value before truncation.."
244 return __put_user(klen
, ulen
);
247 static struct kmem_cache
*sock_inode_cachep __read_mostly
;
249 static struct inode
*sock_alloc_inode(struct super_block
*sb
)
251 struct socket_alloc
*ei
;
253 ei
= kmem_cache_alloc(sock_inode_cachep
, GFP_KERNEL
);
256 ei
->socket
.wq
= kmalloc(sizeof(struct socket_wq
), GFP_KERNEL
);
257 if (!ei
->socket
.wq
) {
258 kmem_cache_free(sock_inode_cachep
, ei
);
261 init_waitqueue_head(&ei
->socket
.wq
->wait
);
262 ei
->socket
.wq
->fasync_list
= NULL
;
264 ei
->socket
.state
= SS_UNCONNECTED
;
265 ei
->socket
.flags
= 0;
266 ei
->socket
.ops
= NULL
;
267 ei
->socket
.sk
= NULL
;
268 ei
->socket
.file
= NULL
;
270 return &ei
->vfs_inode
;
274 static void wq_free_rcu(struct rcu_head
*head
)
276 struct socket_wq
*wq
= container_of(head
, struct socket_wq
, rcu
);
281 static void sock_destroy_inode(struct inode
*inode
)
283 struct socket_alloc
*ei
;
285 ei
= container_of(inode
, struct socket_alloc
, vfs_inode
);
286 call_rcu(&ei
->socket
.wq
->rcu
, wq_free_rcu
);
287 kmem_cache_free(sock_inode_cachep
, ei
);
290 static void init_once(void *foo
)
292 struct socket_alloc
*ei
= (struct socket_alloc
*)foo
;
294 inode_init_once(&ei
->vfs_inode
);
297 static int init_inodecache(void)
299 sock_inode_cachep
= kmem_cache_create("sock_inode_cache",
300 sizeof(struct socket_alloc
),
302 (SLAB_HWCACHE_ALIGN
|
303 SLAB_RECLAIM_ACCOUNT
|
306 if (sock_inode_cachep
== NULL
)
311 static const struct super_operations sockfs_ops
= {
312 .alloc_inode
= sock_alloc_inode
,
313 .destroy_inode
= sock_destroy_inode
,
314 .statfs
= simple_statfs
,
317 static int sockfs_get_sb(struct file_system_type
*fs_type
,
318 int flags
, const char *dev_name
, void *data
,
319 struct vfsmount
*mnt
)
321 return get_sb_pseudo(fs_type
, "socket:", &sockfs_ops
, SOCKFS_MAGIC
,
325 static struct vfsmount
*sock_mnt __read_mostly
;
327 static struct file_system_type sock_fs_type
= {
329 .get_sb
= sockfs_get_sb
,
330 .kill_sb
= kill_anon_super
,
334 * sockfs_dname() is called from d_path().
336 static char *sockfs_dname(struct dentry
*dentry
, char *buffer
, int buflen
)
338 return dynamic_dname(dentry
, buffer
, buflen
, "socket:[%lu]",
339 dentry
->d_inode
->i_ino
);
342 static const struct dentry_operations sockfs_dentry_operations
= {
343 .d_dname
= sockfs_dname
,
347 * Obtains the first available file descriptor and sets it up for use.
349 * These functions create file structures and maps them to fd space
350 * of the current process. On success it returns file descriptor
351 * and file struct implicitly stored in sock->file.
352 * Note that another thread may close file descriptor before we return
353 * from this function. We use the fact that now we do not refer
354 * to socket after mapping. If one day we will need it, this
355 * function will increment ref. count on file by 1.
357 * In any case returned fd MAY BE not valid!
358 * This race condition is unavoidable
359 * with shared fd spaces, we cannot solve it inside kernel,
360 * but we take care of internal coherence yet.
363 static int sock_alloc_file(struct socket
*sock
, struct file
**f
, int flags
)
365 struct qstr name
= { .name
= "" };
370 fd
= get_unused_fd_flags(flags
);
371 if (unlikely(fd
< 0))
374 path
.dentry
= d_alloc(sock_mnt
->mnt_sb
->s_root
, &name
);
375 if (unlikely(!path
.dentry
)) {
379 path
.mnt
= mntget(sock_mnt
);
381 path
.dentry
->d_op
= &sockfs_dentry_operations
;
382 d_instantiate(path
.dentry
, SOCK_INODE(sock
));
383 SOCK_INODE(sock
)->i_fop
= &socket_file_ops
;
385 file
= alloc_file(&path
, FMODE_READ
| FMODE_WRITE
,
387 if (unlikely(!file
)) {
388 /* drop dentry, keep inode */
389 atomic_inc(&path
.dentry
->d_inode
->i_count
);
396 file
->f_flags
= O_RDWR
| (flags
& O_NONBLOCK
);
398 file
->private_data
= sock
;
404 int sock_map_fd(struct socket
*sock
, int flags
)
406 struct file
*newfile
;
407 int fd
= sock_alloc_file(sock
, &newfile
, flags
);
410 fd_install(fd
, newfile
);
414 EXPORT_SYMBOL(sock_map_fd
);
416 static struct socket
*sock_from_file(struct file
*file
, int *err
)
418 if (file
->f_op
== &socket_file_ops
)
419 return file
->private_data
; /* set in sock_map_fd */
426 * sockfd_lookup - Go from a file number to its socket slot
428 * @err: pointer to an error code return
430 * The file handle passed in is locked and the socket it is bound
431 * too is returned. If an error occurs the err pointer is overwritten
432 * with a negative errno code and NULL is returned. The function checks
433 * for both invalid handles and passing a handle which is not a socket.
435 * On a success the socket object pointer is returned.
438 struct socket
*sockfd_lookup(int fd
, int *err
)
449 sock
= sock_from_file(file
, err
);
454 EXPORT_SYMBOL(sockfd_lookup
);
456 static struct socket
*sockfd_lookup_light(int fd
, int *err
, int *fput_needed
)
462 file
= fget_light(fd
, fput_needed
);
464 sock
= sock_from_file(file
, err
);
467 fput_light(file
, *fput_needed
);
473 * sock_alloc - allocate a socket
475 * Allocate a new inode and socket object. The two are bound together
476 * and initialised. The socket is then returned. If we are out of inodes
480 static struct socket
*sock_alloc(void)
485 inode
= new_inode(sock_mnt
->mnt_sb
);
489 sock
= SOCKET_I(inode
);
491 kmemcheck_annotate_bitfield(sock
, type
);
492 inode
->i_mode
= S_IFSOCK
| S_IRWXUGO
;
493 inode
->i_uid
= current_fsuid();
494 inode
->i_gid
= current_fsgid();
496 percpu_add(sockets_in_use
, 1);
501 * In theory you can't get an open on this inode, but /proc provides
502 * a back door. Remember to keep it shut otherwise you'll let the
503 * creepy crawlies in.
506 static int sock_no_open(struct inode
*irrelevant
, struct file
*dontcare
)
511 const struct file_operations bad_sock_fops
= {
512 .owner
= THIS_MODULE
,
513 .open
= sock_no_open
,
517 * sock_release - close a socket
518 * @sock: socket to close
520 * The socket is released from the protocol stack if it has a release
521 * callback, and the inode is then released if the socket is bound to
522 * an inode not a file.
525 void sock_release(struct socket
*sock
)
528 struct module
*owner
= sock
->ops
->owner
;
530 sock
->ops
->release(sock
);
535 if (sock
->wq
->fasync_list
)
536 printk(KERN_ERR
"sock_release: fasync list not empty!\n");
538 percpu_sub(sockets_in_use
, 1);
540 iput(SOCK_INODE(sock
));
545 EXPORT_SYMBOL(sock_release
);
547 int sock_tx_timestamp(struct msghdr
*msg
, struct sock
*sk
,
548 union skb_shared_tx
*shtx
)
551 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_HARDWARE
))
553 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_SOFTWARE
))
557 EXPORT_SYMBOL(sock_tx_timestamp
);
559 static inline int __sock_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
560 struct msghdr
*msg
, size_t size
)
562 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
565 sock_update_classid(sock
->sk
);
572 err
= security_socket_sendmsg(sock
, msg
, size
);
576 return sock
->ops
->sendmsg(iocb
, sock
, msg
, size
);
579 int sock_sendmsg(struct socket
*sock
, struct msghdr
*msg
, size_t size
)
582 struct sock_iocb siocb
;
585 init_sync_kiocb(&iocb
, NULL
);
586 iocb
.private = &siocb
;
587 ret
= __sock_sendmsg(&iocb
, sock
, msg
, size
);
588 if (-EIOCBQUEUED
== ret
)
589 ret
= wait_on_sync_kiocb(&iocb
);
592 EXPORT_SYMBOL(sock_sendmsg
);
594 int kernel_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
595 struct kvec
*vec
, size_t num
, size_t size
)
597 mm_segment_t oldfs
= get_fs();
602 * the following is safe, since for compiler definitions of kvec and
603 * iovec are identical, yielding the same in-core layout and alignment
605 msg
->msg_iov
= (struct iovec
*)vec
;
606 msg
->msg_iovlen
= num
;
607 result
= sock_sendmsg(sock
, msg
, size
);
611 EXPORT_SYMBOL(kernel_sendmsg
);
613 static int ktime2ts(ktime_t kt
, struct timespec
*ts
)
616 *ts
= ktime_to_timespec(kt
);
624 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
626 void __sock_recv_timestamp(struct msghdr
*msg
, struct sock
*sk
,
629 int need_software_tstamp
= sock_flag(sk
, SOCK_RCVTSTAMP
);
630 struct timespec ts
[3];
632 struct skb_shared_hwtstamps
*shhwtstamps
=
635 /* Race occurred between timestamp enabling and packet
636 receiving. Fill in the current time for now. */
637 if (need_software_tstamp
&& skb
->tstamp
.tv64
== 0)
638 __net_timestamp(skb
);
640 if (need_software_tstamp
) {
641 if (!sock_flag(sk
, SOCK_RCVTSTAMPNS
)) {
643 skb_get_timestamp(skb
, &tv
);
644 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMP
,
647 skb_get_timestampns(skb
, &ts
[0]);
648 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMPNS
,
649 sizeof(ts
[0]), &ts
[0]);
654 memset(ts
, 0, sizeof(ts
));
655 if (skb
->tstamp
.tv64
&&
656 sock_flag(sk
, SOCK_TIMESTAMPING_SOFTWARE
)) {
657 skb_get_timestampns(skb
, ts
+ 0);
661 if (sock_flag(sk
, SOCK_TIMESTAMPING_SYS_HARDWARE
) &&
662 ktime2ts(shhwtstamps
->syststamp
, ts
+ 1))
664 if (sock_flag(sk
, SOCK_TIMESTAMPING_RAW_HARDWARE
) &&
665 ktime2ts(shhwtstamps
->hwtstamp
, ts
+ 2))
669 put_cmsg(msg
, SOL_SOCKET
,
670 SCM_TIMESTAMPING
, sizeof(ts
), &ts
);
672 EXPORT_SYMBOL_GPL(__sock_recv_timestamp
);
674 inline void sock_recv_drops(struct msghdr
*msg
, struct sock
*sk
, struct sk_buff
*skb
)
676 if (sock_flag(sk
, SOCK_RXQ_OVFL
) && skb
&& skb
->dropcount
)
677 put_cmsg(msg
, SOL_SOCKET
, SO_RXQ_OVFL
,
678 sizeof(__u32
), &skb
->dropcount
);
681 void __sock_recv_ts_and_drops(struct msghdr
*msg
, struct sock
*sk
,
684 sock_recv_timestamp(msg
, sk
, skb
);
685 sock_recv_drops(msg
, sk
, skb
);
687 EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops
);
689 static inline int __sock_recvmsg_nosec(struct kiocb
*iocb
, struct socket
*sock
,
690 struct msghdr
*msg
, size_t size
, int flags
)
692 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
694 sock_update_classid(sock
->sk
);
702 return sock
->ops
->recvmsg(iocb
, sock
, msg
, size
, flags
);
705 static inline int __sock_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
706 struct msghdr
*msg
, size_t size
, int flags
)
708 int err
= security_socket_recvmsg(sock
, msg
, size
, flags
);
710 return err
?: __sock_recvmsg_nosec(iocb
, sock
, msg
, size
, flags
);
713 int sock_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
714 size_t size
, int flags
)
717 struct sock_iocb siocb
;
720 init_sync_kiocb(&iocb
, NULL
);
721 iocb
.private = &siocb
;
722 ret
= __sock_recvmsg(&iocb
, sock
, msg
, size
, flags
);
723 if (-EIOCBQUEUED
== ret
)
724 ret
= wait_on_sync_kiocb(&iocb
);
727 EXPORT_SYMBOL(sock_recvmsg
);
729 static int sock_recvmsg_nosec(struct socket
*sock
, struct msghdr
*msg
,
730 size_t size
, int flags
)
733 struct sock_iocb siocb
;
736 init_sync_kiocb(&iocb
, NULL
);
737 iocb
.private = &siocb
;
738 ret
= __sock_recvmsg_nosec(&iocb
, sock
, msg
, size
, flags
);
739 if (-EIOCBQUEUED
== ret
)
740 ret
= wait_on_sync_kiocb(&iocb
);
744 int kernel_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
745 struct kvec
*vec
, size_t num
, size_t size
, int flags
)
747 mm_segment_t oldfs
= get_fs();
752 * the following is safe, since for compiler definitions of kvec and
753 * iovec are identical, yielding the same in-core layout and alignment
755 msg
->msg_iov
= (struct iovec
*)vec
, msg
->msg_iovlen
= num
;
756 result
= sock_recvmsg(sock
, msg
, size
, flags
);
760 EXPORT_SYMBOL(kernel_recvmsg
);
762 static void sock_aio_dtor(struct kiocb
*iocb
)
764 kfree(iocb
->private);
767 static ssize_t
sock_sendpage(struct file
*file
, struct page
*page
,
768 int offset
, size_t size
, loff_t
*ppos
, int more
)
773 sock
= file
->private_data
;
775 flags
= !(file
->f_flags
& O_NONBLOCK
) ? 0 : MSG_DONTWAIT
;
779 return kernel_sendpage(sock
, page
, offset
, size
, flags
);
782 static ssize_t
sock_splice_read(struct file
*file
, loff_t
*ppos
,
783 struct pipe_inode_info
*pipe
, size_t len
,
786 struct socket
*sock
= file
->private_data
;
788 if (unlikely(!sock
->ops
->splice_read
))
791 sock_update_classid(sock
->sk
);
793 return sock
->ops
->splice_read(sock
, ppos
, pipe
, len
, flags
);
796 static struct sock_iocb
*alloc_sock_iocb(struct kiocb
*iocb
,
797 struct sock_iocb
*siocb
)
799 if (!is_sync_kiocb(iocb
)) {
800 siocb
= kmalloc(sizeof(*siocb
), GFP_KERNEL
);
803 iocb
->ki_dtor
= sock_aio_dtor
;
807 iocb
->private = siocb
;
811 static ssize_t
do_sock_read(struct msghdr
*msg
, struct kiocb
*iocb
,
812 struct file
*file
, const struct iovec
*iov
,
813 unsigned long nr_segs
)
815 struct socket
*sock
= file
->private_data
;
819 for (i
= 0; i
< nr_segs
; i
++)
820 size
+= iov
[i
].iov_len
;
822 msg
->msg_name
= NULL
;
823 msg
->msg_namelen
= 0;
824 msg
->msg_control
= NULL
;
825 msg
->msg_controllen
= 0;
826 msg
->msg_iov
= (struct iovec
*)iov
;
827 msg
->msg_iovlen
= nr_segs
;
828 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
830 return __sock_recvmsg(iocb
, sock
, msg
, size
, msg
->msg_flags
);
833 static ssize_t
sock_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
834 unsigned long nr_segs
, loff_t pos
)
836 struct sock_iocb siocb
, *x
;
841 if (iocb
->ki_left
== 0) /* Match SYS5 behaviour */
845 x
= alloc_sock_iocb(iocb
, &siocb
);
848 return do_sock_read(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
851 static ssize_t
do_sock_write(struct msghdr
*msg
, struct kiocb
*iocb
,
852 struct file
*file
, const struct iovec
*iov
,
853 unsigned long nr_segs
)
855 struct socket
*sock
= file
->private_data
;
859 for (i
= 0; i
< nr_segs
; i
++)
860 size
+= iov
[i
].iov_len
;
862 msg
->msg_name
= NULL
;
863 msg
->msg_namelen
= 0;
864 msg
->msg_control
= NULL
;
865 msg
->msg_controllen
= 0;
866 msg
->msg_iov
= (struct iovec
*)iov
;
867 msg
->msg_iovlen
= nr_segs
;
868 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
869 if (sock
->type
== SOCK_SEQPACKET
)
870 msg
->msg_flags
|= MSG_EOR
;
872 return __sock_sendmsg(iocb
, sock
, msg
, size
);
875 static ssize_t
sock_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
876 unsigned long nr_segs
, loff_t pos
)
878 struct sock_iocb siocb
, *x
;
883 x
= alloc_sock_iocb(iocb
, &siocb
);
887 return do_sock_write(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
891 * Atomic setting of ioctl hooks to avoid race
892 * with module unload.
895 static DEFINE_MUTEX(br_ioctl_mutex
);
896 static int (*br_ioctl_hook
) (struct net
*, unsigned int cmd
, void __user
*arg
);
898 void brioctl_set(int (*hook
) (struct net
*, unsigned int, void __user
*))
900 mutex_lock(&br_ioctl_mutex
);
901 br_ioctl_hook
= hook
;
902 mutex_unlock(&br_ioctl_mutex
);
904 EXPORT_SYMBOL(brioctl_set
);
906 static DEFINE_MUTEX(vlan_ioctl_mutex
);
907 static int (*vlan_ioctl_hook
) (struct net
*, void __user
*arg
);
909 void vlan_ioctl_set(int (*hook
) (struct net
*, void __user
*))
911 mutex_lock(&vlan_ioctl_mutex
);
912 vlan_ioctl_hook
= hook
;
913 mutex_unlock(&vlan_ioctl_mutex
);
915 EXPORT_SYMBOL(vlan_ioctl_set
);
917 static DEFINE_MUTEX(dlci_ioctl_mutex
);
918 static int (*dlci_ioctl_hook
) (unsigned int, void __user
*);
920 void dlci_ioctl_set(int (*hook
) (unsigned int, void __user
*))
922 mutex_lock(&dlci_ioctl_mutex
);
923 dlci_ioctl_hook
= hook
;
924 mutex_unlock(&dlci_ioctl_mutex
);
926 EXPORT_SYMBOL(dlci_ioctl_set
);
928 static long sock_do_ioctl(struct net
*net
, struct socket
*sock
,
929 unsigned int cmd
, unsigned long arg
)
932 void __user
*argp
= (void __user
*)arg
;
934 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
937 * If this ioctl is unknown try to hand it down
940 if (err
== -ENOIOCTLCMD
)
941 err
= dev_ioctl(net
, cmd
, argp
);
947 * With an ioctl, arg may well be a user mode pointer, but we don't know
948 * what to do with it - that's up to the protocol still.
951 static long sock_ioctl(struct file
*file
, unsigned cmd
, unsigned long arg
)
955 void __user
*argp
= (void __user
*)arg
;
959 sock
= file
->private_data
;
962 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15)) {
963 err
= dev_ioctl(net
, cmd
, argp
);
965 #ifdef CONFIG_WEXT_CORE
966 if (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
) {
967 err
= dev_ioctl(net
, cmd
, argp
);
974 if (get_user(pid
, (int __user
*)argp
))
976 err
= f_setown(sock
->file
, pid
, 1);
980 err
= put_user(f_getown(sock
->file
),
989 request_module("bridge");
991 mutex_lock(&br_ioctl_mutex
);
993 err
= br_ioctl_hook(net
, cmd
, argp
);
994 mutex_unlock(&br_ioctl_mutex
);
999 if (!vlan_ioctl_hook
)
1000 request_module("8021q");
1002 mutex_lock(&vlan_ioctl_mutex
);
1003 if (vlan_ioctl_hook
)
1004 err
= vlan_ioctl_hook(net
, argp
);
1005 mutex_unlock(&vlan_ioctl_mutex
);
1010 if (!dlci_ioctl_hook
)
1011 request_module("dlci");
1013 mutex_lock(&dlci_ioctl_mutex
);
1014 if (dlci_ioctl_hook
)
1015 err
= dlci_ioctl_hook(cmd
, argp
);
1016 mutex_unlock(&dlci_ioctl_mutex
);
1019 err
= sock_do_ioctl(net
, sock
, cmd
, arg
);
1025 int sock_create_lite(int family
, int type
, int protocol
, struct socket
**res
)
1028 struct socket
*sock
= NULL
;
1030 err
= security_socket_create(family
, type
, protocol
, 1);
1034 sock
= sock_alloc();
1041 err
= security_socket_post_create(sock
, family
, type
, protocol
, 1);
1053 EXPORT_SYMBOL(sock_create_lite
);
1055 /* No kernel lock held - perfect */
1056 static unsigned int sock_poll(struct file
*file
, poll_table
*wait
)
1058 struct socket
*sock
;
1061 * We can't return errors to poll, so it's either yes or no.
1063 sock
= file
->private_data
;
1064 return sock
->ops
->poll(file
, sock
, wait
);
1067 static int sock_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1069 struct socket
*sock
= file
->private_data
;
1071 return sock
->ops
->mmap(file
, sock
, vma
);
1074 static int sock_close(struct inode
*inode
, struct file
*filp
)
1077 * It was possible the inode is NULL we were
1078 * closing an unfinished socket.
1082 printk(KERN_DEBUG
"sock_close: NULL inode\n");
1085 sock_release(SOCKET_I(inode
));
1090 * Update the socket async list
1092 * Fasync_list locking strategy.
1094 * 1. fasync_list is modified only under process context socket lock
1095 * i.e. under semaphore.
1096 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
1097 * or under socket lock
1100 static int sock_fasync(int fd
, struct file
*filp
, int on
)
1102 struct socket
*sock
= filp
->private_data
;
1103 struct sock
*sk
= sock
->sk
;
1110 fasync_helper(fd
, filp
, on
, &sock
->wq
->fasync_list
);
1112 if (!sock
->wq
->fasync_list
)
1113 sock_reset_flag(sk
, SOCK_FASYNC
);
1115 sock_set_flag(sk
, SOCK_FASYNC
);
1121 /* This function may be called only under socket lock or callback_lock or rcu_lock */
1123 int sock_wake_async(struct socket
*sock
, int how
, int band
)
1125 struct socket_wq
*wq
;
1130 wq
= rcu_dereference(sock
->wq
);
1131 if (!wq
|| !wq
->fasync_list
) {
1136 case SOCK_WAKE_WAITD
:
1137 if (test_bit(SOCK_ASYNC_WAITDATA
, &sock
->flags
))
1140 case SOCK_WAKE_SPACE
:
1141 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE
, &sock
->flags
))
1146 kill_fasync(&wq
->fasync_list
, SIGIO
, band
);
1149 kill_fasync(&wq
->fasync_list
, SIGURG
, band
);
1154 EXPORT_SYMBOL(sock_wake_async
);
1156 static int __sock_create(struct net
*net
, int family
, int type
, int protocol
,
1157 struct socket
**res
, int kern
)
1160 struct socket
*sock
;
1161 const struct net_proto_family
*pf
;
1164 * Check protocol is in range
1166 if (family
< 0 || family
>= NPROTO
)
1167 return -EAFNOSUPPORT
;
1168 if (type
< 0 || type
>= SOCK_MAX
)
1173 This uglymoron is moved from INET layer to here to avoid
1174 deadlock in module load.
1176 if (family
== PF_INET
&& type
== SOCK_PACKET
) {
1180 printk(KERN_INFO
"%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1186 err
= security_socket_create(family
, type
, protocol
, kern
);
1191 * Allocate the socket and allow the family to set things up. if
1192 * the protocol is 0, the family is instructed to select an appropriate
1195 sock
= sock_alloc();
1197 if (net_ratelimit())
1198 printk(KERN_WARNING
"socket: no more sockets\n");
1199 return -ENFILE
; /* Not exactly a match, but its the
1200 closest posix thing */
1205 #ifdef CONFIG_MODULES
1206 /* Attempt to load a protocol module if the find failed.
1208 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
1209 * requested real, full-featured networking support upon configuration.
1210 * Otherwise module support will break!
1212 if (net_families
[family
] == NULL
)
1213 request_module("net-pf-%d", family
);
1217 pf
= rcu_dereference(net_families
[family
]);
1218 err
= -EAFNOSUPPORT
;
1223 * We will call the ->create function, that possibly is in a loadable
1224 * module, so we have to bump that loadable module refcnt first.
1226 if (!try_module_get(pf
->owner
))
1229 /* Now protected by module ref count */
1232 err
= pf
->create(net
, sock
, protocol
, kern
);
1234 goto out_module_put
;
1237 * Now to bump the refcnt of the [loadable] module that owns this
1238 * socket at sock_release time we decrement its refcnt.
1240 if (!try_module_get(sock
->ops
->owner
))
1241 goto out_module_busy
;
1244 * Now that we're done with the ->create function, the [loadable]
1245 * module can have its refcnt decremented
1247 module_put(pf
->owner
);
1248 err
= security_socket_post_create(sock
, family
, type
, protocol
, kern
);
1250 goto out_sock_release
;
1256 err
= -EAFNOSUPPORT
;
1259 module_put(pf
->owner
);
1266 goto out_sock_release
;
1269 int sock_create(int family
, int type
, int protocol
, struct socket
**res
)
1271 return __sock_create(current
->nsproxy
->net_ns
, family
, type
, protocol
, res
, 0);
1273 EXPORT_SYMBOL(sock_create
);
1275 int sock_create_kern(int family
, int type
, int protocol
, struct socket
**res
)
1277 return __sock_create(&init_net
, family
, type
, protocol
, res
, 1);
1279 EXPORT_SYMBOL(sock_create_kern
);
1281 SYSCALL_DEFINE3(socket
, int, family
, int, type
, int, protocol
)
1284 struct socket
*sock
;
1287 /* Check the SOCK_* constants for consistency. */
1288 BUILD_BUG_ON(SOCK_CLOEXEC
!= O_CLOEXEC
);
1289 BUILD_BUG_ON((SOCK_MAX
| SOCK_TYPE_MASK
) != SOCK_TYPE_MASK
);
1290 BUILD_BUG_ON(SOCK_CLOEXEC
& SOCK_TYPE_MASK
);
1291 BUILD_BUG_ON(SOCK_NONBLOCK
& SOCK_TYPE_MASK
);
1293 flags
= type
& ~SOCK_TYPE_MASK
;
1294 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1296 type
&= SOCK_TYPE_MASK
;
1298 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1299 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1301 retval
= sock_create(family
, type
, protocol
, &sock
);
1305 retval
= sock_map_fd(sock
, flags
& (O_CLOEXEC
| O_NONBLOCK
));
1310 /* It may be already another descriptor 8) Not kernel problem. */
1319 * Create a pair of connected sockets.
1322 SYSCALL_DEFINE4(socketpair
, int, family
, int, type
, int, protocol
,
1323 int __user
*, usockvec
)
1325 struct socket
*sock1
, *sock2
;
1327 struct file
*newfile1
, *newfile2
;
1330 flags
= type
& ~SOCK_TYPE_MASK
;
1331 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1333 type
&= SOCK_TYPE_MASK
;
1335 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1336 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1339 * Obtain the first socket and check if the underlying protocol
1340 * supports the socketpair call.
1343 err
= sock_create(family
, type
, protocol
, &sock1
);
1347 err
= sock_create(family
, type
, protocol
, &sock2
);
1351 err
= sock1
->ops
->socketpair(sock1
, sock2
);
1353 goto out_release_both
;
1355 fd1
= sock_alloc_file(sock1
, &newfile1
, flags
);
1356 if (unlikely(fd1
< 0)) {
1358 goto out_release_both
;
1361 fd2
= sock_alloc_file(sock2
, &newfile2
, flags
);
1362 if (unlikely(fd2
< 0)) {
1366 sock_release(sock2
);
1370 audit_fd_pair(fd1
, fd2
);
1371 fd_install(fd1
, newfile1
);
1372 fd_install(fd2
, newfile2
);
1373 /* fd1 and fd2 may be already another descriptors.
1374 * Not kernel problem.
1377 err
= put_user(fd1
, &usockvec
[0]);
1379 err
= put_user(fd2
, &usockvec
[1]);
1388 sock_release(sock2
);
1390 sock_release(sock1
);
1396 * Bind a name to a socket. Nothing much to do here since it's
1397 * the protocol's responsibility to handle the local address.
1399 * We move the socket address to kernel space before we call
1400 * the protocol layer (having also checked the address is ok).
1403 SYSCALL_DEFINE3(bind
, int, fd
, struct sockaddr __user
*, umyaddr
, int, addrlen
)
1405 struct socket
*sock
;
1406 struct sockaddr_storage address
;
1407 int err
, fput_needed
;
1409 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1411 err
= move_addr_to_kernel(umyaddr
, addrlen
, (struct sockaddr
*)&address
);
1413 err
= security_socket_bind(sock
,
1414 (struct sockaddr
*)&address
,
1417 err
= sock
->ops
->bind(sock
,
1421 fput_light(sock
->file
, fput_needed
);
1427 * Perform a listen. Basically, we allow the protocol to do anything
1428 * necessary for a listen, and if that works, we mark the socket as
1429 * ready for listening.
1432 SYSCALL_DEFINE2(listen
, int, fd
, int, backlog
)
1434 struct socket
*sock
;
1435 int err
, fput_needed
;
1438 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1440 somaxconn
= sock_net(sock
->sk
)->core
.sysctl_somaxconn
;
1441 if ((unsigned)backlog
> somaxconn
)
1442 backlog
= somaxconn
;
1444 err
= security_socket_listen(sock
, backlog
);
1446 err
= sock
->ops
->listen(sock
, backlog
);
1448 fput_light(sock
->file
, fput_needed
);
1454 * For accept, we attempt to create a new socket, set up the link
1455 * with the client, wake up the client, then return the new
1456 * connected fd. We collect the address of the connector in kernel
1457 * space and move it to user at the very end. This is unclean because
1458 * we open the socket then return an error.
1460 * 1003.1g adds the ability to recvmsg() to query connection pending
1461 * status to recvmsg. We need to add that support in a way thats
1462 * clean when we restucture accept also.
1465 SYSCALL_DEFINE4(accept4
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1466 int __user
*, upeer_addrlen
, int, flags
)
1468 struct socket
*sock
, *newsock
;
1469 struct file
*newfile
;
1470 int err
, len
, newfd
, fput_needed
;
1471 struct sockaddr_storage address
;
1473 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1476 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1477 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1479 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1484 newsock
= sock_alloc();
1488 newsock
->type
= sock
->type
;
1489 newsock
->ops
= sock
->ops
;
1492 * We don't need try_module_get here, as the listening socket (sock)
1493 * has the protocol module (sock->ops->owner) held.
1495 __module_get(newsock
->ops
->owner
);
1497 newfd
= sock_alloc_file(newsock
, &newfile
, flags
);
1498 if (unlikely(newfd
< 0)) {
1500 sock_release(newsock
);
1504 err
= security_socket_accept(sock
, newsock
);
1508 err
= sock
->ops
->accept(sock
, newsock
, sock
->file
->f_flags
);
1512 if (upeer_sockaddr
) {
1513 if (newsock
->ops
->getname(newsock
, (struct sockaddr
*)&address
,
1515 err
= -ECONNABORTED
;
1518 err
= move_addr_to_user((struct sockaddr
*)&address
,
1519 len
, upeer_sockaddr
, upeer_addrlen
);
1524 /* File flags are not inherited via accept() unlike another OSes. */
1526 fd_install(newfd
, newfile
);
1530 fput_light(sock
->file
, fput_needed
);
1535 put_unused_fd(newfd
);
1539 SYSCALL_DEFINE3(accept
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1540 int __user
*, upeer_addrlen
)
1542 return sys_accept4(fd
, upeer_sockaddr
, upeer_addrlen
, 0);
1546 * Attempt to connect to a socket with the server address. The address
1547 * is in user space so we verify it is OK and move it to kernel space.
1549 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1552 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1553 * other SEQPACKET protocols that take time to connect() as it doesn't
1554 * include the -EINPROGRESS status for such sockets.
1557 SYSCALL_DEFINE3(connect
, int, fd
, struct sockaddr __user
*, uservaddr
,
1560 struct socket
*sock
;
1561 struct sockaddr_storage address
;
1562 int err
, fput_needed
;
1564 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1567 err
= move_addr_to_kernel(uservaddr
, addrlen
, (struct sockaddr
*)&address
);
1572 security_socket_connect(sock
, (struct sockaddr
*)&address
, addrlen
);
1576 err
= sock
->ops
->connect(sock
, (struct sockaddr
*)&address
, addrlen
,
1577 sock
->file
->f_flags
);
1579 fput_light(sock
->file
, fput_needed
);
1585 * Get the local address ('name') of a socket object. Move the obtained
1586 * name to user space.
1589 SYSCALL_DEFINE3(getsockname
, int, fd
, struct sockaddr __user
*, usockaddr
,
1590 int __user
*, usockaddr_len
)
1592 struct socket
*sock
;
1593 struct sockaddr_storage address
;
1594 int len
, err
, fput_needed
;
1596 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1600 err
= security_socket_getsockname(sock
);
1604 err
= sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
, 0);
1607 err
= move_addr_to_user((struct sockaddr
*)&address
, len
, usockaddr
, usockaddr_len
);
1610 fput_light(sock
->file
, fput_needed
);
1616 * Get the remote address ('name') of a socket object. Move the obtained
1617 * name to user space.
1620 SYSCALL_DEFINE3(getpeername
, int, fd
, struct sockaddr __user
*, usockaddr
,
1621 int __user
*, usockaddr_len
)
1623 struct socket
*sock
;
1624 struct sockaddr_storage address
;
1625 int len
, err
, fput_needed
;
1627 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1629 err
= security_socket_getpeername(sock
);
1631 fput_light(sock
->file
, fput_needed
);
1636 sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
,
1639 err
= move_addr_to_user((struct sockaddr
*)&address
, len
, usockaddr
,
1641 fput_light(sock
->file
, fput_needed
);
1647 * Send a datagram to a given address. We move the address into kernel
1648 * space and check the user space data area is readable before invoking
1652 SYSCALL_DEFINE6(sendto
, int, fd
, void __user
*, buff
, size_t, len
,
1653 unsigned, flags
, struct sockaddr __user
*, addr
,
1656 struct socket
*sock
;
1657 struct sockaddr_storage address
;
1663 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1667 iov
.iov_base
= buff
;
1669 msg
.msg_name
= NULL
;
1672 msg
.msg_control
= NULL
;
1673 msg
.msg_controllen
= 0;
1674 msg
.msg_namelen
= 0;
1676 err
= move_addr_to_kernel(addr
, addr_len
, (struct sockaddr
*)&address
);
1679 msg
.msg_name
= (struct sockaddr
*)&address
;
1680 msg
.msg_namelen
= addr_len
;
1682 if (sock
->file
->f_flags
& O_NONBLOCK
)
1683 flags
|= MSG_DONTWAIT
;
1684 msg
.msg_flags
= flags
;
1685 err
= sock_sendmsg(sock
, &msg
, len
);
1688 fput_light(sock
->file
, fput_needed
);
1694 * Send a datagram down a socket.
1697 SYSCALL_DEFINE4(send
, int, fd
, void __user
*, buff
, size_t, len
,
1700 return sys_sendto(fd
, buff
, len
, flags
, NULL
, 0);
1704 * Receive a frame from the socket and optionally record the address of the
1705 * sender. We verify the buffers are writable and if needed move the
1706 * sender address from kernel to user space.
1709 SYSCALL_DEFINE6(recvfrom
, int, fd
, void __user
*, ubuf
, size_t, size
,
1710 unsigned, flags
, struct sockaddr __user
*, addr
,
1711 int __user
*, addr_len
)
1713 struct socket
*sock
;
1716 struct sockaddr_storage address
;
1720 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1724 msg
.msg_control
= NULL
;
1725 msg
.msg_controllen
= 0;
1729 iov
.iov_base
= ubuf
;
1730 msg
.msg_name
= (struct sockaddr
*)&address
;
1731 msg
.msg_namelen
= sizeof(address
);
1732 if (sock
->file
->f_flags
& O_NONBLOCK
)
1733 flags
|= MSG_DONTWAIT
;
1734 err
= sock_recvmsg(sock
, &msg
, size
, flags
);
1736 if (err
>= 0 && addr
!= NULL
) {
1737 err2
= move_addr_to_user((struct sockaddr
*)&address
,
1738 msg
.msg_namelen
, addr
, addr_len
);
1743 fput_light(sock
->file
, fput_needed
);
1749 * Receive a datagram from a socket.
1752 asmlinkage
long sys_recv(int fd
, void __user
*ubuf
, size_t size
,
1755 return sys_recvfrom(fd
, ubuf
, size
, flags
, NULL
, NULL
);
1759 * Set a socket option. Because we don't know the option lengths we have
1760 * to pass the user mode parameter for the protocols to sort out.
1763 SYSCALL_DEFINE5(setsockopt
, int, fd
, int, level
, int, optname
,
1764 char __user
*, optval
, int, optlen
)
1766 int err
, fput_needed
;
1767 struct socket
*sock
;
1772 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1774 err
= security_socket_setsockopt(sock
, level
, optname
);
1778 if (level
== SOL_SOCKET
)
1780 sock_setsockopt(sock
, level
, optname
, optval
,
1784 sock
->ops
->setsockopt(sock
, level
, optname
, optval
,
1787 fput_light(sock
->file
, fput_needed
);
1793 * Get a socket option. Because we don't know the option lengths we have
1794 * to pass a user mode parameter for the protocols to sort out.
1797 SYSCALL_DEFINE5(getsockopt
, int, fd
, int, level
, int, optname
,
1798 char __user
*, optval
, int __user
*, optlen
)
1800 int err
, fput_needed
;
1801 struct socket
*sock
;
1803 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1805 err
= security_socket_getsockopt(sock
, level
, optname
);
1809 if (level
== SOL_SOCKET
)
1811 sock_getsockopt(sock
, level
, optname
, optval
,
1815 sock
->ops
->getsockopt(sock
, level
, optname
, optval
,
1818 fput_light(sock
->file
, fput_needed
);
1824 * Shutdown a socket.
1827 SYSCALL_DEFINE2(shutdown
, int, fd
, int, how
)
1829 int err
, fput_needed
;
1830 struct socket
*sock
;
1832 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1834 err
= security_socket_shutdown(sock
, how
);
1836 err
= sock
->ops
->shutdown(sock
, how
);
1837 fput_light(sock
->file
, fput_needed
);
1842 /* A couple of helpful macros for getting the address of the 32/64 bit
1843 * fields which are the same type (int / unsigned) on our platforms.
1845 #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1846 #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1847 #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1850 * BSD sendmsg interface
1853 SYSCALL_DEFINE3(sendmsg
, int, fd
, struct msghdr __user
*, msg
, unsigned, flags
)
1855 struct compat_msghdr __user
*msg_compat
=
1856 (struct compat_msghdr __user
*)msg
;
1857 struct socket
*sock
;
1858 struct sockaddr_storage address
;
1859 struct iovec iovstack
[UIO_FASTIOV
], *iov
= iovstack
;
1860 unsigned char ctl
[sizeof(struct cmsghdr
) + 20]
1861 __attribute__ ((aligned(sizeof(__kernel_size_t
))));
1862 /* 20 is size of ipv6_pktinfo */
1863 unsigned char *ctl_buf
= ctl
;
1864 struct msghdr msg_sys
;
1865 int err
, ctl_len
, iov_size
, total_len
;
1869 if (MSG_CMSG_COMPAT
& flags
) {
1870 if (get_compat_msghdr(&msg_sys
, msg_compat
))
1872 } else if (copy_from_user(&msg_sys
, msg
, sizeof(struct msghdr
)))
1875 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1879 /* do not move before msg_sys is valid */
1881 if (msg_sys
.msg_iovlen
> UIO_MAXIOV
)
1884 /* Check whether to allocate the iovec area */
1886 iov_size
= msg_sys
.msg_iovlen
* sizeof(struct iovec
);
1887 if (msg_sys
.msg_iovlen
> UIO_FASTIOV
) {
1888 iov
= sock_kmalloc(sock
->sk
, iov_size
, GFP_KERNEL
);
1893 /* This will also move the address data into kernel space */
1894 if (MSG_CMSG_COMPAT
& flags
) {
1895 err
= verify_compat_iovec(&msg_sys
, iov
,
1896 (struct sockaddr
*)&address
,
1899 err
= verify_iovec(&msg_sys
, iov
,
1900 (struct sockaddr
*)&address
,
1908 if (msg_sys
.msg_controllen
> INT_MAX
)
1910 ctl_len
= msg_sys
.msg_controllen
;
1911 if ((MSG_CMSG_COMPAT
& flags
) && ctl_len
) {
1913 cmsghdr_from_user_compat_to_kern(&msg_sys
, sock
->sk
, ctl
,
1917 ctl_buf
= msg_sys
.msg_control
;
1918 ctl_len
= msg_sys
.msg_controllen
;
1919 } else if (ctl_len
) {
1920 if (ctl_len
> sizeof(ctl
)) {
1921 ctl_buf
= sock_kmalloc(sock
->sk
, ctl_len
, GFP_KERNEL
);
1922 if (ctl_buf
== NULL
)
1927 * Careful! Before this, msg_sys.msg_control contains a user pointer.
1928 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
1929 * checking falls down on this.
1931 if (copy_from_user(ctl_buf
, (void __user
*)msg_sys
.msg_control
,
1934 msg_sys
.msg_control
= ctl_buf
;
1936 msg_sys
.msg_flags
= flags
;
1938 if (sock
->file
->f_flags
& O_NONBLOCK
)
1939 msg_sys
.msg_flags
|= MSG_DONTWAIT
;
1940 err
= sock_sendmsg(sock
, &msg_sys
, total_len
);
1944 sock_kfree_s(sock
->sk
, ctl_buf
, ctl_len
);
1946 if (iov
!= iovstack
)
1947 sock_kfree_s(sock
->sk
, iov
, iov_size
);
1949 fput_light(sock
->file
, fput_needed
);
1954 static int __sys_recvmsg(struct socket
*sock
, struct msghdr __user
*msg
,
1955 struct msghdr
*msg_sys
, unsigned flags
, int nosec
)
1957 struct compat_msghdr __user
*msg_compat
=
1958 (struct compat_msghdr __user
*)msg
;
1959 struct iovec iovstack
[UIO_FASTIOV
];
1960 struct iovec
*iov
= iovstack
;
1961 unsigned long cmsg_ptr
;
1962 int err
, iov_size
, total_len
, len
;
1964 /* kernel mode address */
1965 struct sockaddr_storage addr
;
1967 /* user mode address pointers */
1968 struct sockaddr __user
*uaddr
;
1969 int __user
*uaddr_len
;
1971 if (MSG_CMSG_COMPAT
& flags
) {
1972 if (get_compat_msghdr(msg_sys
, msg_compat
))
1974 } else if (copy_from_user(msg_sys
, msg
, sizeof(struct msghdr
)))
1978 if (msg_sys
->msg_iovlen
> UIO_MAXIOV
)
1981 /* Check whether to allocate the iovec area */
1983 iov_size
= msg_sys
->msg_iovlen
* sizeof(struct iovec
);
1984 if (msg_sys
->msg_iovlen
> UIO_FASTIOV
) {
1985 iov
= sock_kmalloc(sock
->sk
, iov_size
, GFP_KERNEL
);
1991 * Save the user-mode address (verify_iovec will change the
1992 * kernel msghdr to use the kernel address space)
1995 uaddr
= (__force
void __user
*)msg_sys
->msg_name
;
1996 uaddr_len
= COMPAT_NAMELEN(msg
);
1997 if (MSG_CMSG_COMPAT
& flags
) {
1998 err
= verify_compat_iovec(msg_sys
, iov
,
1999 (struct sockaddr
*)&addr
,
2002 err
= verify_iovec(msg_sys
, iov
,
2003 (struct sockaddr
*)&addr
,
2009 cmsg_ptr
= (unsigned long)msg_sys
->msg_control
;
2010 msg_sys
->msg_flags
= flags
& (MSG_CMSG_CLOEXEC
|MSG_CMSG_COMPAT
);
2012 if (sock
->file
->f_flags
& O_NONBLOCK
)
2013 flags
|= MSG_DONTWAIT
;
2014 err
= (nosec
? sock_recvmsg_nosec
: sock_recvmsg
)(sock
, msg_sys
,
2020 if (uaddr
!= NULL
) {
2021 err
= move_addr_to_user((struct sockaddr
*)&addr
,
2022 msg_sys
->msg_namelen
, uaddr
,
2027 err
= __put_user((msg_sys
->msg_flags
& ~MSG_CMSG_COMPAT
),
2031 if (MSG_CMSG_COMPAT
& flags
)
2032 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2033 &msg_compat
->msg_controllen
);
2035 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2036 &msg
->msg_controllen
);
2042 if (iov
!= iovstack
)
2043 sock_kfree_s(sock
->sk
, iov
, iov_size
);
2049 * BSD recvmsg interface
2052 SYSCALL_DEFINE3(recvmsg
, int, fd
, struct msghdr __user
*, msg
,
2053 unsigned int, flags
)
2055 int fput_needed
, err
;
2056 struct msghdr msg_sys
;
2057 struct socket
*sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2062 err
= __sys_recvmsg(sock
, msg
, &msg_sys
, flags
, 0);
2064 fput_light(sock
->file
, fput_needed
);
2070 * Linux recvmmsg interface
2073 int __sys_recvmmsg(int fd
, struct mmsghdr __user
*mmsg
, unsigned int vlen
,
2074 unsigned int flags
, struct timespec
*timeout
)
2076 int fput_needed
, err
, datagrams
;
2077 struct socket
*sock
;
2078 struct mmsghdr __user
*entry
;
2079 struct compat_mmsghdr __user
*compat_entry
;
2080 struct msghdr msg_sys
;
2081 struct timespec end_time
;
2084 poll_select_set_timeout(&end_time
, timeout
->tv_sec
,
2090 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2094 err
= sock_error(sock
->sk
);
2099 compat_entry
= (struct compat_mmsghdr __user
*)mmsg
;
2101 while (datagrams
< vlen
) {
2103 * No need to ask LSM for more than the first datagram.
2105 if (MSG_CMSG_COMPAT
& flags
) {
2106 err
= __sys_recvmsg(sock
, (struct msghdr __user
*)compat_entry
,
2107 &msg_sys
, flags
, datagrams
);
2110 err
= __put_user(err
, &compat_entry
->msg_len
);
2113 err
= __sys_recvmsg(sock
, (struct msghdr __user
*)entry
,
2114 &msg_sys
, flags
, datagrams
);
2117 err
= put_user(err
, &entry
->msg_len
);
2125 /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
2126 if (flags
& MSG_WAITFORONE
)
2127 flags
|= MSG_DONTWAIT
;
2130 ktime_get_ts(timeout
);
2131 *timeout
= timespec_sub(end_time
, *timeout
);
2132 if (timeout
->tv_sec
< 0) {
2133 timeout
->tv_sec
= timeout
->tv_nsec
= 0;
2137 /* Timeout, return less than vlen datagrams */
2138 if (timeout
->tv_nsec
== 0 && timeout
->tv_sec
== 0)
2142 /* Out of band data, return right away */
2143 if (msg_sys
.msg_flags
& MSG_OOB
)
2148 fput_light(sock
->file
, fput_needed
);
2153 if (datagrams
!= 0) {
2155 * We may return less entries than requested (vlen) if the
2156 * sock is non block and there aren't enough datagrams...
2158 if (err
!= -EAGAIN
) {
2160 * ... or if recvmsg returns an error after we
2161 * received some datagrams, where we record the
2162 * error to return on the next call or if the
2163 * app asks about it using getsockopt(SO_ERROR).
2165 sock
->sk
->sk_err
= -err
;
2174 SYSCALL_DEFINE5(recvmmsg
, int, fd
, struct mmsghdr __user
*, mmsg
,
2175 unsigned int, vlen
, unsigned int, flags
,
2176 struct timespec __user
*, timeout
)
2179 struct timespec timeout_sys
;
2182 return __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, NULL
);
2184 if (copy_from_user(&timeout_sys
, timeout
, sizeof(timeout_sys
)))
2187 datagrams
= __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, &timeout_sys
);
2189 if (datagrams
> 0 &&
2190 copy_to_user(timeout
, &timeout_sys
, sizeof(timeout_sys
)))
2191 datagrams
= -EFAULT
;
2196 #ifdef __ARCH_WANT_SYS_SOCKETCALL
2197 /* Argument list sizes for sys_socketcall */
2198 #define AL(x) ((x) * sizeof(unsigned long))
2199 static const unsigned char nargs
[20] = {
2200 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
2201 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
2202 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
2209 * System call vectors.
2211 * Argument checking cleaned up. Saved 20% in size.
2212 * This function doesn't need to set the kernel lock because
2213 * it is set by the callees.
2216 SYSCALL_DEFINE2(socketcall
, int, call
, unsigned long __user
*, args
)
2219 unsigned long a0
, a1
;
2223 if (call
< 1 || call
> SYS_RECVMMSG
)
2227 if (len
> sizeof(a
))
2230 /* copy_from_user should be SMP safe. */
2231 if (copy_from_user(a
, args
, len
))
2234 audit_socketcall(nargs
[call
] / sizeof(unsigned long), a
);
2241 err
= sys_socket(a0
, a1
, a
[2]);
2244 err
= sys_bind(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2247 err
= sys_connect(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2250 err
= sys_listen(a0
, a1
);
2253 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2254 (int __user
*)a
[2], 0);
2256 case SYS_GETSOCKNAME
:
2258 sys_getsockname(a0
, (struct sockaddr __user
*)a1
,
2259 (int __user
*)a
[2]);
2261 case SYS_GETPEERNAME
:
2263 sys_getpeername(a0
, (struct sockaddr __user
*)a1
,
2264 (int __user
*)a
[2]);
2266 case SYS_SOCKETPAIR
:
2267 err
= sys_socketpair(a0
, a1
, a
[2], (int __user
*)a
[3]);
2270 err
= sys_send(a0
, (void __user
*)a1
, a
[2], a
[3]);
2273 err
= sys_sendto(a0
, (void __user
*)a1
, a
[2], a
[3],
2274 (struct sockaddr __user
*)a
[4], a
[5]);
2277 err
= sys_recv(a0
, (void __user
*)a1
, a
[2], a
[3]);
2280 err
= sys_recvfrom(a0
, (void __user
*)a1
, a
[2], a
[3],
2281 (struct sockaddr __user
*)a
[4],
2282 (int __user
*)a
[5]);
2285 err
= sys_shutdown(a0
, a1
);
2287 case SYS_SETSOCKOPT
:
2288 err
= sys_setsockopt(a0
, a1
, a
[2], (char __user
*)a
[3], a
[4]);
2290 case SYS_GETSOCKOPT
:
2292 sys_getsockopt(a0
, a1
, a
[2], (char __user
*)a
[3],
2293 (int __user
*)a
[4]);
2296 err
= sys_sendmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2299 err
= sys_recvmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2302 err
= sys_recvmmsg(a0
, (struct mmsghdr __user
*)a1
, a
[2], a
[3],
2303 (struct timespec __user
*)a
[4]);
2306 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2307 (int __user
*)a
[2], a
[3]);
2316 #endif /* __ARCH_WANT_SYS_SOCKETCALL */
2319 * sock_register - add a socket protocol handler
2320 * @ops: description of protocol
2322 * This function is called by a protocol handler that wants to
2323 * advertise its address family, and have it linked into the
2324 * socket interface. The value ops->family coresponds to the
2325 * socket system call protocol family.
2327 int sock_register(const struct net_proto_family
*ops
)
2331 if (ops
->family
>= NPROTO
) {
2332 printk(KERN_CRIT
"protocol %d >= NPROTO(%d)\n", ops
->family
,
2337 spin_lock(&net_family_lock
);
2338 if (net_families
[ops
->family
])
2341 net_families
[ops
->family
] = ops
;
2344 spin_unlock(&net_family_lock
);
2346 printk(KERN_INFO
"NET: Registered protocol family %d\n", ops
->family
);
2349 EXPORT_SYMBOL(sock_register
);
2352 * sock_unregister - remove a protocol handler
2353 * @family: protocol family to remove
2355 * This function is called by a protocol handler that wants to
2356 * remove its address family, and have it unlinked from the
2357 * new socket creation.
2359 * If protocol handler is a module, then it can use module reference
2360 * counts to protect against new references. If protocol handler is not
2361 * a module then it needs to provide its own protection in
2362 * the ops->create routine.
2364 void sock_unregister(int family
)
2366 BUG_ON(family
< 0 || family
>= NPROTO
);
2368 spin_lock(&net_family_lock
);
2369 net_families
[family
] = NULL
;
2370 spin_unlock(&net_family_lock
);
2374 printk(KERN_INFO
"NET: Unregistered protocol family %d\n", family
);
2376 EXPORT_SYMBOL(sock_unregister
);
2378 static int __init
sock_init(void)
2381 * Initialize sock SLAB cache.
2387 * Initialize skbuff SLAB cache
2392 * Initialize the protocols module.
2396 register_filesystem(&sock_fs_type
);
2397 sock_mnt
= kern_mount(&sock_fs_type
);
2399 /* The real protocol initialization is performed in later initcalls.
2402 #ifdef CONFIG_NETFILTER
2409 core_initcall(sock_init
); /* early initcall */
2411 #ifdef CONFIG_PROC_FS
2412 void socket_seq_show(struct seq_file
*seq
)
2417 for_each_possible_cpu(cpu
)
2418 counter
+= per_cpu(sockets_in_use
, cpu
);
2420 /* It can be negative, by the way. 8) */
2424 seq_printf(seq
, "sockets: used %d\n", counter
);
2426 #endif /* CONFIG_PROC_FS */
2428 #ifdef CONFIG_COMPAT
2429 static int do_siocgstamp(struct net
*net
, struct socket
*sock
,
2430 unsigned int cmd
, struct compat_timeval __user
*up
)
2432 mm_segment_t old_fs
= get_fs();
2437 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&ktv
);
2440 err
= put_user(ktv
.tv_sec
, &up
->tv_sec
);
2441 err
|= __put_user(ktv
.tv_usec
, &up
->tv_usec
);
2446 static int do_siocgstampns(struct net
*net
, struct socket
*sock
,
2447 unsigned int cmd
, struct compat_timespec __user
*up
)
2449 mm_segment_t old_fs
= get_fs();
2450 struct timespec kts
;
2454 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&kts
);
2457 err
= put_user(kts
.tv_sec
, &up
->tv_sec
);
2458 err
|= __put_user(kts
.tv_nsec
, &up
->tv_nsec
);
2463 static int dev_ifname32(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2465 struct ifreq __user
*uifr
;
2468 uifr
= compat_alloc_user_space(sizeof(struct ifreq
));
2469 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2472 err
= dev_ioctl(net
, SIOCGIFNAME
, uifr
);
2476 if (copy_in_user(uifr32
, uifr
, sizeof(struct compat_ifreq
)))
2482 static int dev_ifconf(struct net
*net
, struct compat_ifconf __user
*uifc32
)
2484 struct compat_ifconf ifc32
;
2486 struct ifconf __user
*uifc
;
2487 struct compat_ifreq __user
*ifr32
;
2488 struct ifreq __user
*ifr
;
2492 if (copy_from_user(&ifc32
, uifc32
, sizeof(struct compat_ifconf
)))
2495 if (ifc32
.ifcbuf
== 0) {
2499 uifc
= compat_alloc_user_space(sizeof(struct ifconf
));
2501 size_t len
= ((ifc32
.ifc_len
/ sizeof(struct compat_ifreq
)) + 1) *
2502 sizeof(struct ifreq
);
2503 uifc
= compat_alloc_user_space(sizeof(struct ifconf
) + len
);
2505 ifr
= ifc
.ifc_req
= (void __user
*)(uifc
+ 1);
2506 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2507 for (i
= 0; i
< ifc32
.ifc_len
; i
+= sizeof(struct compat_ifreq
)) {
2508 if (copy_in_user(ifr
, ifr32
, sizeof(struct compat_ifreq
)))
2514 if (copy_to_user(uifc
, &ifc
, sizeof(struct ifconf
)))
2517 err
= dev_ioctl(net
, SIOCGIFCONF
, uifc
);
2521 if (copy_from_user(&ifc
, uifc
, sizeof(struct ifconf
)))
2525 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2527 i
+ sizeof(struct compat_ifreq
) <= ifc32
.ifc_len
&& j
< ifc
.ifc_len
;
2528 i
+= sizeof(struct compat_ifreq
), j
+= sizeof(struct ifreq
)) {
2529 if (copy_in_user(ifr32
, ifr
, sizeof(struct compat_ifreq
)))
2535 if (ifc32
.ifcbuf
== 0) {
2536 /* Translate from 64-bit structure multiple to
2540 i
= ((i
/ sizeof(struct ifreq
)) * sizeof(struct compat_ifreq
));
2545 if (copy_to_user(uifc32
, &ifc32
, sizeof(struct compat_ifconf
)))
2551 static int ethtool_ioctl(struct net
*net
, struct compat_ifreq __user
*ifr32
)
2553 struct ifreq __user
*ifr
;
2557 ifr
= compat_alloc_user_space(sizeof(*ifr
));
2559 if (copy_in_user(&ifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2562 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2565 datap
= compat_ptr(data
);
2566 if (put_user(datap
, &ifr
->ifr_ifru
.ifru_data
))
2569 return dev_ioctl(net
, SIOCETHTOOL
, ifr
);
2572 static int compat_siocwandev(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2575 compat_uptr_t uptr32
;
2576 struct ifreq __user
*uifr
;
2578 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2579 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2582 if (get_user(uptr32
, &uifr32
->ifr_settings
.ifs_ifsu
))
2585 uptr
= compat_ptr(uptr32
);
2587 if (put_user(uptr
, &uifr
->ifr_settings
.ifs_ifsu
.raw_hdlc
))
2590 return dev_ioctl(net
, SIOCWANDEV
, uifr
);
2593 static int bond_ioctl(struct net
*net
, unsigned int cmd
,
2594 struct compat_ifreq __user
*ifr32
)
2597 struct ifreq __user
*uifr
;
2598 mm_segment_t old_fs
;
2604 case SIOCBONDENSLAVE
:
2605 case SIOCBONDRELEASE
:
2606 case SIOCBONDSETHWADDR
:
2607 case SIOCBONDCHANGEACTIVE
:
2608 if (copy_from_user(&kifr
, ifr32
, sizeof(struct compat_ifreq
)))
2613 err
= dev_ioctl(net
, cmd
, &kifr
);
2617 case SIOCBONDSLAVEINFOQUERY
:
2618 case SIOCBONDINFOQUERY
:
2619 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2620 if (copy_in_user(&uifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2623 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2626 datap
= compat_ptr(data
);
2627 if (put_user(datap
, &uifr
->ifr_ifru
.ifru_data
))
2630 return dev_ioctl(net
, cmd
, uifr
);
2636 static int siocdevprivate_ioctl(struct net
*net
, unsigned int cmd
,
2637 struct compat_ifreq __user
*u_ifreq32
)
2639 struct ifreq __user
*u_ifreq64
;
2640 char tmp_buf
[IFNAMSIZ
];
2641 void __user
*data64
;
2644 if (copy_from_user(&tmp_buf
[0], &(u_ifreq32
->ifr_ifrn
.ifrn_name
[0]),
2647 if (__get_user(data32
, &u_ifreq32
->ifr_ifru
.ifru_data
))
2649 data64
= compat_ptr(data32
);
2651 u_ifreq64
= compat_alloc_user_space(sizeof(*u_ifreq64
));
2653 /* Don't check these user accesses, just let that get trapped
2654 * in the ioctl handler instead.
2656 if (copy_to_user(&u_ifreq64
->ifr_ifrn
.ifrn_name
[0], &tmp_buf
[0],
2659 if (__put_user(data64
, &u_ifreq64
->ifr_ifru
.ifru_data
))
2662 return dev_ioctl(net
, cmd
, u_ifreq64
);
2665 static int dev_ifsioc(struct net
*net
, struct socket
*sock
,
2666 unsigned int cmd
, struct compat_ifreq __user
*uifr32
)
2668 struct ifreq __user
*uifr
;
2671 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2672 if (copy_in_user(uifr
, uifr32
, sizeof(*uifr32
)))
2675 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)uifr
);
2686 case SIOCGIFBRDADDR
:
2687 case SIOCGIFDSTADDR
:
2688 case SIOCGIFNETMASK
:
2693 if (copy_in_user(uifr32
, uifr
, sizeof(*uifr32
)))
2701 static int compat_sioc_ifmap(struct net
*net
, unsigned int cmd
,
2702 struct compat_ifreq __user
*uifr32
)
2705 struct compat_ifmap __user
*uifmap32
;
2706 mm_segment_t old_fs
;
2709 uifmap32
= &uifr32
->ifr_ifru
.ifru_map
;
2710 err
= copy_from_user(&ifr
, uifr32
, sizeof(ifr
.ifr_name
));
2711 err
|= __get_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
2712 err
|= __get_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
2713 err
|= __get_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
2714 err
|= __get_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
2715 err
|= __get_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
2716 err
|= __get_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
2722 err
= dev_ioctl(net
, cmd
, (void __user
*)&ifr
);
2725 if (cmd
== SIOCGIFMAP
&& !err
) {
2726 err
= copy_to_user(uifr32
, &ifr
, sizeof(ifr
.ifr_name
));
2727 err
|= __put_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
2728 err
|= __put_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
2729 err
|= __put_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
2730 err
|= __put_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
2731 err
|= __put_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
2732 err
|= __put_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
2739 static int compat_siocshwtstamp(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2742 compat_uptr_t uptr32
;
2743 struct ifreq __user
*uifr
;
2745 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2746 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2749 if (get_user(uptr32
, &uifr32
->ifr_data
))
2752 uptr
= compat_ptr(uptr32
);
2754 if (put_user(uptr
, &uifr
->ifr_data
))
2757 return dev_ioctl(net
, SIOCSHWTSTAMP
, uifr
);
2762 struct sockaddr rt_dst
; /* target address */
2763 struct sockaddr rt_gateway
; /* gateway addr (RTF_GATEWAY) */
2764 struct sockaddr rt_genmask
; /* target network mask (IP) */
2765 unsigned short rt_flags
;
2768 unsigned char rt_tos
;
2769 unsigned char rt_class
;
2771 short rt_metric
; /* +1 for binary compatibility! */
2772 /* char * */ u32 rt_dev
; /* forcing the device at add */
2773 u32 rt_mtu
; /* per route MTU/Window */
2774 u32 rt_window
; /* Window clamping */
2775 unsigned short rt_irtt
; /* Initial RTT */
2778 struct in6_rtmsg32
{
2779 struct in6_addr rtmsg_dst
;
2780 struct in6_addr rtmsg_src
;
2781 struct in6_addr rtmsg_gateway
;
2791 static int routing_ioctl(struct net
*net
, struct socket
*sock
,
2792 unsigned int cmd
, void __user
*argp
)
2796 struct in6_rtmsg r6
;
2800 mm_segment_t old_fs
= get_fs();
2802 if (sock
&& sock
->sk
&& sock
->sk
->sk_family
== AF_INET6
) { /* ipv6 */
2803 struct in6_rtmsg32 __user
*ur6
= argp
;
2804 ret
= copy_from_user(&r6
.rtmsg_dst
, &(ur6
->rtmsg_dst
),
2805 3 * sizeof(struct in6_addr
));
2806 ret
|= __get_user(r6
.rtmsg_type
, &(ur6
->rtmsg_type
));
2807 ret
|= __get_user(r6
.rtmsg_dst_len
, &(ur6
->rtmsg_dst_len
));
2808 ret
|= __get_user(r6
.rtmsg_src_len
, &(ur6
->rtmsg_src_len
));
2809 ret
|= __get_user(r6
.rtmsg_metric
, &(ur6
->rtmsg_metric
));
2810 ret
|= __get_user(r6
.rtmsg_info
, &(ur6
->rtmsg_info
));
2811 ret
|= __get_user(r6
.rtmsg_flags
, &(ur6
->rtmsg_flags
));
2812 ret
|= __get_user(r6
.rtmsg_ifindex
, &(ur6
->rtmsg_ifindex
));
2816 struct rtentry32 __user
*ur4
= argp
;
2817 ret
= copy_from_user(&r4
.rt_dst
, &(ur4
->rt_dst
),
2818 3 * sizeof(struct sockaddr
));
2819 ret
|= __get_user(r4
.rt_flags
, &(ur4
->rt_flags
));
2820 ret
|= __get_user(r4
.rt_metric
, &(ur4
->rt_metric
));
2821 ret
|= __get_user(r4
.rt_mtu
, &(ur4
->rt_mtu
));
2822 ret
|= __get_user(r4
.rt_window
, &(ur4
->rt_window
));
2823 ret
|= __get_user(r4
.rt_irtt
, &(ur4
->rt_irtt
));
2824 ret
|= __get_user(rtdev
, &(ur4
->rt_dev
));
2826 ret
|= copy_from_user(devname
, compat_ptr(rtdev
), 15);
2827 r4
.rt_dev
= devname
; devname
[15] = 0;
2840 ret
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long) r
);
2847 /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
2848 * for some operations; this forces use of the newer bridge-utils that
2849 * use compatiable ioctls
2851 static int old_bridge_ioctl(compat_ulong_t __user
*argp
)
2855 if (get_user(tmp
, argp
))
2857 if (tmp
== BRCTL_GET_VERSION
)
2858 return BRCTL_VERSION
+ 1;
2862 static int compat_sock_ioctl_trans(struct file
*file
, struct socket
*sock
,
2863 unsigned int cmd
, unsigned long arg
)
2865 void __user
*argp
= compat_ptr(arg
);
2866 struct sock
*sk
= sock
->sk
;
2867 struct net
*net
= sock_net(sk
);
2869 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15))
2870 return siocdevprivate_ioctl(net
, cmd
, argp
);
2875 return old_bridge_ioctl(argp
);
2877 return dev_ifname32(net
, argp
);
2879 return dev_ifconf(net
, argp
);
2881 return ethtool_ioctl(net
, argp
);
2883 return compat_siocwandev(net
, argp
);
2886 return compat_sioc_ifmap(net
, cmd
, argp
);
2887 case SIOCBONDENSLAVE
:
2888 case SIOCBONDRELEASE
:
2889 case SIOCBONDSETHWADDR
:
2890 case SIOCBONDSLAVEINFOQUERY
:
2891 case SIOCBONDINFOQUERY
:
2892 case SIOCBONDCHANGEACTIVE
:
2893 return bond_ioctl(net
, cmd
, argp
);
2896 return routing_ioctl(net
, sock
, cmd
, argp
);
2898 return do_siocgstamp(net
, sock
, cmd
, argp
);
2900 return do_siocgstampns(net
, sock
, cmd
, argp
);
2902 return compat_siocshwtstamp(net
, argp
);
2914 return sock_ioctl(file
, cmd
, arg
);
2931 case SIOCSIFHWBROADCAST
:
2933 case SIOCGIFBRDADDR
:
2934 case SIOCSIFBRDADDR
:
2935 case SIOCGIFDSTADDR
:
2936 case SIOCSIFDSTADDR
:
2937 case SIOCGIFNETMASK
:
2938 case SIOCSIFNETMASK
:
2949 return dev_ifsioc(net
, sock
, cmd
, argp
);
2955 return sock_do_ioctl(net
, sock
, cmd
, arg
);
2958 /* Prevent warning from compat_sys_ioctl, these always
2959 * result in -EINVAL in the native case anyway. */
2972 return -ENOIOCTLCMD
;
2975 static long compat_sock_ioctl(struct file
*file
, unsigned cmd
,
2978 struct socket
*sock
= file
->private_data
;
2979 int ret
= -ENOIOCTLCMD
;
2986 if (sock
->ops
->compat_ioctl
)
2987 ret
= sock
->ops
->compat_ioctl(sock
, cmd
, arg
);
2989 if (ret
== -ENOIOCTLCMD
&&
2990 (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
))
2991 ret
= compat_wext_handle_ioctl(net
, cmd
, arg
);
2993 if (ret
== -ENOIOCTLCMD
)
2994 ret
= compat_sock_ioctl_trans(file
, sock
, cmd
, arg
);
3000 int kernel_bind(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
)
3002 return sock
->ops
->bind(sock
, addr
, addrlen
);
3004 EXPORT_SYMBOL(kernel_bind
);
3006 int kernel_listen(struct socket
*sock
, int backlog
)
3008 return sock
->ops
->listen(sock
, backlog
);
3010 EXPORT_SYMBOL(kernel_listen
);
3012 int kernel_accept(struct socket
*sock
, struct socket
**newsock
, int flags
)
3014 struct sock
*sk
= sock
->sk
;
3017 err
= sock_create_lite(sk
->sk_family
, sk
->sk_type
, sk
->sk_protocol
,
3022 err
= sock
->ops
->accept(sock
, *newsock
, flags
);
3024 sock_release(*newsock
);
3029 (*newsock
)->ops
= sock
->ops
;
3030 __module_get((*newsock
)->ops
->owner
);
3035 EXPORT_SYMBOL(kernel_accept
);
3037 int kernel_connect(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
,
3040 return sock
->ops
->connect(sock
, addr
, addrlen
, flags
);
3042 EXPORT_SYMBOL(kernel_connect
);
3044 int kernel_getsockname(struct socket
*sock
, struct sockaddr
*addr
,
3047 return sock
->ops
->getname(sock
, addr
, addrlen
, 0);
3049 EXPORT_SYMBOL(kernel_getsockname
);
3051 int kernel_getpeername(struct socket
*sock
, struct sockaddr
*addr
,
3054 return sock
->ops
->getname(sock
, addr
, addrlen
, 1);
3056 EXPORT_SYMBOL(kernel_getpeername
);
3058 int kernel_getsockopt(struct socket
*sock
, int level
, int optname
,
3059 char *optval
, int *optlen
)
3061 mm_segment_t oldfs
= get_fs();
3065 if (level
== SOL_SOCKET
)
3066 err
= sock_getsockopt(sock
, level
, optname
, optval
, optlen
);
3068 err
= sock
->ops
->getsockopt(sock
, level
, optname
, optval
,
3073 EXPORT_SYMBOL(kernel_getsockopt
);
3075 int kernel_setsockopt(struct socket
*sock
, int level
, int optname
,
3076 char *optval
, unsigned int optlen
)
3078 mm_segment_t oldfs
= get_fs();
3082 if (level
== SOL_SOCKET
)
3083 err
= sock_setsockopt(sock
, level
, optname
, optval
, optlen
);
3085 err
= sock
->ops
->setsockopt(sock
, level
, optname
, optval
,
3090 EXPORT_SYMBOL(kernel_setsockopt
);
3092 int kernel_sendpage(struct socket
*sock
, struct page
*page
, int offset
,
3093 size_t size
, int flags
)
3095 sock_update_classid(sock
->sk
);
3097 if (sock
->ops
->sendpage
)
3098 return sock
->ops
->sendpage(sock
, page
, offset
, size
, flags
);
3100 return sock_no_sendpage(sock
, page
, offset
, size
, flags
);
3102 EXPORT_SYMBOL(kernel_sendpage
);
3104 int kernel_sock_ioctl(struct socket
*sock
, int cmd
, unsigned long arg
)
3106 mm_segment_t oldfs
= get_fs();
3110 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
3115 EXPORT_SYMBOL(kernel_sock_ioctl
);
3117 int kernel_sock_shutdown(struct socket
*sock
, enum sock_shutdown_cmd how
)
3119 return sock
->ops
->shutdown(sock
, how
);
3121 EXPORT_SYMBOL(kernel_sock_shutdown
);