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>
99 #include <linux/netfilter.h>
101 #include <linux/if_tun.h>
102 #include <linux/ipv6_route.h>
103 #include <linux/route.h>
104 #include <linux/sockios.h>
105 #include <linux/atalk.h>
107 static int sock_no_open(struct inode
*irrelevant
, struct file
*dontcare
);
108 static ssize_t
sock_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
109 unsigned long nr_segs
, loff_t pos
);
110 static ssize_t
sock_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
111 unsigned long nr_segs
, loff_t pos
);
112 static int sock_mmap(struct file
*file
, struct vm_area_struct
*vma
);
114 static int sock_close(struct inode
*inode
, struct file
*file
);
115 static unsigned int sock_poll(struct file
*file
,
116 struct poll_table_struct
*wait
);
117 static long sock_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
119 static long compat_sock_ioctl(struct file
*file
,
120 unsigned int cmd
, unsigned long arg
);
122 static int sock_fasync(int fd
, struct file
*filp
, int on
);
123 static ssize_t
sock_sendpage(struct file
*file
, struct page
*page
,
124 int offset
, size_t size
, loff_t
*ppos
, int more
);
125 static ssize_t
sock_splice_read(struct file
*file
, loff_t
*ppos
,
126 struct pipe_inode_info
*pipe
, size_t len
,
130 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
131 * in the operation structures but are done directly via the socketcall() multiplexor.
134 static const struct file_operations socket_file_ops
= {
135 .owner
= THIS_MODULE
,
137 .aio_read
= sock_aio_read
,
138 .aio_write
= sock_aio_write
,
140 .unlocked_ioctl
= sock_ioctl
,
142 .compat_ioctl
= compat_sock_ioctl
,
145 .open
= sock_no_open
, /* special open code to disallow open via /proc */
146 .release
= sock_close
,
147 .fasync
= sock_fasync
,
148 .sendpage
= sock_sendpage
,
149 .splice_write
= generic_splice_sendpage
,
150 .splice_read
= sock_splice_read
,
154 * The protocol list. Each protocol is registered in here.
157 static DEFINE_SPINLOCK(net_family_lock
);
158 static const struct net_proto_family
*net_families
[NPROTO
] __read_mostly
;
161 * Statistics counters of the socket lists
164 static DEFINE_PER_CPU(int, sockets_in_use
) = 0;
168 * Move socket addresses back and forth across the kernel/user
169 * divide and look after the messy bits.
172 #define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
173 16 for IP, 16 for IPX,
176 must be at least one bigger than
177 the AF_UNIX size (see net/unix/af_unix.c
182 * move_addr_to_kernel - copy a socket address into kernel space
183 * @uaddr: Address in user space
184 * @kaddr: Address in kernel space
185 * @ulen: Length in user space
187 * The address is copied into kernel space. If the provided address is
188 * too long an error code of -EINVAL is returned. If the copy gives
189 * invalid addresses -EFAULT is returned. On a success 0 is returned.
192 int move_addr_to_kernel(void __user
*uaddr
, int ulen
, struct sockaddr
*kaddr
)
194 if (ulen
< 0 || ulen
> sizeof(struct sockaddr_storage
))
198 if (copy_from_user(kaddr
, uaddr
, ulen
))
200 return audit_sockaddr(ulen
, kaddr
);
204 * move_addr_to_user - copy an address to user space
205 * @kaddr: kernel space address
206 * @klen: length of address in kernel
207 * @uaddr: user space address
208 * @ulen: pointer to user length field
210 * The value pointed to by ulen on entry is the buffer length available.
211 * This is overwritten with the buffer space used. -EINVAL is returned
212 * if an overlong buffer is specified or a negative buffer size. -EFAULT
213 * is returned if either the buffer or the length field are not
215 * After copying the data up to the limit the user specifies, the true
216 * length of the data is written over the length limit the user
217 * specified. Zero is returned for a success.
220 int move_addr_to_user(struct sockaddr
*kaddr
, int klen
, void __user
*uaddr
,
226 err
= get_user(len
, ulen
);
231 if (len
< 0 || len
> sizeof(struct sockaddr_storage
))
234 if (audit_sockaddr(klen
, kaddr
))
236 if (copy_to_user(uaddr
, kaddr
, len
))
240 * "fromlen shall refer to the value before truncation.."
243 return __put_user(klen
, ulen
);
246 static struct kmem_cache
*sock_inode_cachep __read_mostly
;
248 static struct inode
*sock_alloc_inode(struct super_block
*sb
)
250 struct socket_alloc
*ei
;
252 ei
= kmem_cache_alloc(sock_inode_cachep
, GFP_KERNEL
);
255 ei
->socket
.wq
= kmalloc(sizeof(struct socket_wq
), GFP_KERNEL
);
256 if (!ei
->socket
.wq
) {
257 kmem_cache_free(sock_inode_cachep
, ei
);
260 init_waitqueue_head(&ei
->socket
.wq
->wait
);
261 ei
->socket
.wq
->fasync_list
= NULL
;
263 ei
->socket
.state
= SS_UNCONNECTED
;
264 ei
->socket
.flags
= 0;
265 ei
->socket
.ops
= NULL
;
266 ei
->socket
.sk
= NULL
;
267 ei
->socket
.file
= NULL
;
269 return &ei
->vfs_inode
;
273 static void wq_free_rcu(struct rcu_head
*head
)
275 struct socket_wq
*wq
= container_of(head
, struct socket_wq
, rcu
);
280 static void sock_destroy_inode(struct inode
*inode
)
282 struct socket_alloc
*ei
;
284 ei
= container_of(inode
, struct socket_alloc
, vfs_inode
);
285 call_rcu(&ei
->socket
.wq
->rcu
, wq_free_rcu
);
286 kmem_cache_free(sock_inode_cachep
, ei
);
289 static void init_once(void *foo
)
291 struct socket_alloc
*ei
= (struct socket_alloc
*)foo
;
293 inode_init_once(&ei
->vfs_inode
);
296 static int init_inodecache(void)
298 sock_inode_cachep
= kmem_cache_create("sock_inode_cache",
299 sizeof(struct socket_alloc
),
301 (SLAB_HWCACHE_ALIGN
|
302 SLAB_RECLAIM_ACCOUNT
|
305 if (sock_inode_cachep
== NULL
)
310 static const struct super_operations sockfs_ops
= {
311 .alloc_inode
= sock_alloc_inode
,
312 .destroy_inode
=sock_destroy_inode
,
313 .statfs
= simple_statfs
,
316 static int sockfs_get_sb(struct file_system_type
*fs_type
,
317 int flags
, const char *dev_name
, void *data
,
318 struct vfsmount
*mnt
)
320 return get_sb_pseudo(fs_type
, "socket:", &sockfs_ops
, SOCKFS_MAGIC
,
324 static struct vfsmount
*sock_mnt __read_mostly
;
326 static struct file_system_type sock_fs_type
= {
328 .get_sb
= sockfs_get_sb
,
329 .kill_sb
= kill_anon_super
,
333 * sockfs_dname() is called from d_path().
335 static char *sockfs_dname(struct dentry
*dentry
, char *buffer
, int buflen
)
337 return dynamic_dname(dentry
, buffer
, buflen
, "socket:[%lu]",
338 dentry
->d_inode
->i_ino
);
341 static const struct dentry_operations sockfs_dentry_operations
= {
342 .d_dname
= sockfs_dname
,
346 * Obtains the first available file descriptor and sets it up for use.
348 * These functions create file structures and maps them to fd space
349 * of the current process. On success it returns file descriptor
350 * and file struct implicitly stored in sock->file.
351 * Note that another thread may close file descriptor before we return
352 * from this function. We use the fact that now we do not refer
353 * to socket after mapping. If one day we will need it, this
354 * function will increment ref. count on file by 1.
356 * In any case returned fd MAY BE not valid!
357 * This race condition is unavoidable
358 * with shared fd spaces, we cannot solve it inside kernel,
359 * but we take care of internal coherence yet.
362 static int sock_alloc_file(struct socket
*sock
, struct file
**f
, int flags
)
364 struct qstr name
= { .name
= "" };
369 fd
= get_unused_fd_flags(flags
);
370 if (unlikely(fd
< 0))
373 path
.dentry
= d_alloc(sock_mnt
->mnt_sb
->s_root
, &name
);
374 if (unlikely(!path
.dentry
)) {
378 path
.mnt
= mntget(sock_mnt
);
380 path
.dentry
->d_op
= &sockfs_dentry_operations
;
381 d_instantiate(path
.dentry
, SOCK_INODE(sock
));
382 SOCK_INODE(sock
)->i_fop
= &socket_file_ops
;
384 file
= alloc_file(&path
, FMODE_READ
| FMODE_WRITE
,
386 if (unlikely(!file
)) {
387 /* drop dentry, keep inode */
388 atomic_inc(&path
.dentry
->d_inode
->i_count
);
395 file
->f_flags
= O_RDWR
| (flags
& O_NONBLOCK
);
397 file
->private_data
= sock
;
403 int sock_map_fd(struct socket
*sock
, int flags
)
405 struct file
*newfile
;
406 int fd
= sock_alloc_file(sock
, &newfile
, flags
);
409 fd_install(fd
, newfile
);
414 static struct socket
*sock_from_file(struct file
*file
, int *err
)
416 if (file
->f_op
== &socket_file_ops
)
417 return file
->private_data
; /* set in sock_map_fd */
424 * sockfd_lookup - Go from a file number to its socket slot
426 * @err: pointer to an error code return
428 * The file handle passed in is locked and the socket it is bound
429 * too is returned. If an error occurs the err pointer is overwritten
430 * with a negative errno code and NULL is returned. The function checks
431 * for both invalid handles and passing a handle which is not a socket.
433 * On a success the socket object pointer is returned.
436 struct socket
*sockfd_lookup(int fd
, int *err
)
447 sock
= sock_from_file(file
, err
);
453 static struct socket
*sockfd_lookup_light(int fd
, int *err
, int *fput_needed
)
459 file
= fget_light(fd
, fput_needed
);
461 sock
= sock_from_file(file
, err
);
464 fput_light(file
, *fput_needed
);
470 * sock_alloc - allocate a socket
472 * Allocate a new inode and socket object. The two are bound together
473 * and initialised. The socket is then returned. If we are out of inodes
477 static struct socket
*sock_alloc(void)
482 inode
= new_inode(sock_mnt
->mnt_sb
);
486 sock
= SOCKET_I(inode
);
488 kmemcheck_annotate_bitfield(sock
, type
);
489 inode
->i_mode
= S_IFSOCK
| S_IRWXUGO
;
490 inode
->i_uid
= current_fsuid();
491 inode
->i_gid
= current_fsgid();
493 percpu_add(sockets_in_use
, 1);
498 * In theory you can't get an open on this inode, but /proc provides
499 * a back door. Remember to keep it shut otherwise you'll let the
500 * creepy crawlies in.
503 static int sock_no_open(struct inode
*irrelevant
, struct file
*dontcare
)
508 const struct file_operations bad_sock_fops
= {
509 .owner
= THIS_MODULE
,
510 .open
= sock_no_open
,
514 * sock_release - close a socket
515 * @sock: socket to close
517 * The socket is released from the protocol stack if it has a release
518 * callback, and the inode is then released if the socket is bound to
519 * an inode not a file.
522 void sock_release(struct socket
*sock
)
525 struct module
*owner
= sock
->ops
->owner
;
527 sock
->ops
->release(sock
);
532 if (sock
->wq
->fasync_list
)
533 printk(KERN_ERR
"sock_release: fasync list not empty!\n");
535 percpu_sub(sockets_in_use
, 1);
537 iput(SOCK_INODE(sock
));
543 int sock_tx_timestamp(struct msghdr
*msg
, struct sock
*sk
,
544 union skb_shared_tx
*shtx
)
547 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_HARDWARE
))
549 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_SOFTWARE
))
553 EXPORT_SYMBOL(sock_tx_timestamp
);
555 static inline int __sock_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
556 struct msghdr
*msg
, size_t size
)
558 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
566 err
= security_socket_sendmsg(sock
, msg
, size
);
570 return sock
->ops
->sendmsg(iocb
, sock
, msg
, size
);
573 int sock_sendmsg(struct socket
*sock
, struct msghdr
*msg
, size_t size
)
576 struct sock_iocb siocb
;
579 init_sync_kiocb(&iocb
, NULL
);
580 iocb
.private = &siocb
;
581 ret
= __sock_sendmsg(&iocb
, sock
, msg
, size
);
582 if (-EIOCBQUEUED
== ret
)
583 ret
= wait_on_sync_kiocb(&iocb
);
587 int kernel_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
588 struct kvec
*vec
, size_t num
, size_t size
)
590 mm_segment_t oldfs
= get_fs();
595 * the following is safe, since for compiler definitions of kvec and
596 * iovec are identical, yielding the same in-core layout and alignment
598 msg
->msg_iov
= (struct iovec
*)vec
;
599 msg
->msg_iovlen
= num
;
600 result
= sock_sendmsg(sock
, msg
, size
);
605 static int ktime2ts(ktime_t kt
, struct timespec
*ts
)
608 *ts
= ktime_to_timespec(kt
);
616 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
618 void __sock_recv_timestamp(struct msghdr
*msg
, struct sock
*sk
,
621 int need_software_tstamp
= sock_flag(sk
, SOCK_RCVTSTAMP
);
622 struct timespec ts
[3];
624 struct skb_shared_hwtstamps
*shhwtstamps
=
627 /* Race occurred between timestamp enabling and packet
628 receiving. Fill in the current time for now. */
629 if (need_software_tstamp
&& skb
->tstamp
.tv64
== 0)
630 __net_timestamp(skb
);
632 if (need_software_tstamp
) {
633 if (!sock_flag(sk
, SOCK_RCVTSTAMPNS
)) {
635 skb_get_timestamp(skb
, &tv
);
636 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMP
,
639 skb_get_timestampns(skb
, &ts
[0]);
640 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMPNS
,
641 sizeof(ts
[0]), &ts
[0]);
646 memset(ts
, 0, sizeof(ts
));
647 if (skb
->tstamp
.tv64
&&
648 sock_flag(sk
, SOCK_TIMESTAMPING_SOFTWARE
)) {
649 skb_get_timestampns(skb
, ts
+ 0);
653 if (sock_flag(sk
, SOCK_TIMESTAMPING_SYS_HARDWARE
) &&
654 ktime2ts(shhwtstamps
->syststamp
, ts
+ 1))
656 if (sock_flag(sk
, SOCK_TIMESTAMPING_RAW_HARDWARE
) &&
657 ktime2ts(shhwtstamps
->hwtstamp
, ts
+ 2))
661 put_cmsg(msg
, SOL_SOCKET
,
662 SCM_TIMESTAMPING
, sizeof(ts
), &ts
);
665 EXPORT_SYMBOL_GPL(__sock_recv_timestamp
);
667 inline void sock_recv_drops(struct msghdr
*msg
, struct sock
*sk
, struct sk_buff
*skb
)
669 if (sock_flag(sk
, SOCK_RXQ_OVFL
) && skb
&& skb
->dropcount
)
670 put_cmsg(msg
, SOL_SOCKET
, SO_RXQ_OVFL
,
671 sizeof(__u32
), &skb
->dropcount
);
674 void __sock_recv_ts_and_drops(struct msghdr
*msg
, struct sock
*sk
,
677 sock_recv_timestamp(msg
, sk
, skb
);
678 sock_recv_drops(msg
, sk
, skb
);
680 EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops
);
682 static inline int __sock_recvmsg_nosec(struct kiocb
*iocb
, struct socket
*sock
,
683 struct msghdr
*msg
, size_t size
, int flags
)
685 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
693 return sock
->ops
->recvmsg(iocb
, sock
, msg
, size
, flags
);
696 static inline int __sock_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
697 struct msghdr
*msg
, size_t size
, int flags
)
699 int err
= security_socket_recvmsg(sock
, msg
, size
, flags
);
701 return err
?: __sock_recvmsg_nosec(iocb
, sock
, msg
, size
, flags
);
704 int sock_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
705 size_t size
, int flags
)
708 struct sock_iocb siocb
;
711 init_sync_kiocb(&iocb
, NULL
);
712 iocb
.private = &siocb
;
713 ret
= __sock_recvmsg(&iocb
, sock
, msg
, size
, flags
);
714 if (-EIOCBQUEUED
== ret
)
715 ret
= wait_on_sync_kiocb(&iocb
);
719 static int sock_recvmsg_nosec(struct socket
*sock
, struct msghdr
*msg
,
720 size_t size
, int flags
)
723 struct sock_iocb siocb
;
726 init_sync_kiocb(&iocb
, NULL
);
727 iocb
.private = &siocb
;
728 ret
= __sock_recvmsg_nosec(&iocb
, sock
, msg
, size
, flags
);
729 if (-EIOCBQUEUED
== ret
)
730 ret
= wait_on_sync_kiocb(&iocb
);
734 int kernel_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
735 struct kvec
*vec
, size_t num
, size_t size
, int flags
)
737 mm_segment_t oldfs
= get_fs();
742 * the following is safe, since for compiler definitions of kvec and
743 * iovec are identical, yielding the same in-core layout and alignment
745 msg
->msg_iov
= (struct iovec
*)vec
, msg
->msg_iovlen
= num
;
746 result
= sock_recvmsg(sock
, msg
, size
, flags
);
751 static void sock_aio_dtor(struct kiocb
*iocb
)
753 kfree(iocb
->private);
756 static ssize_t
sock_sendpage(struct file
*file
, struct page
*page
,
757 int offset
, size_t size
, loff_t
*ppos
, int more
)
762 sock
= file
->private_data
;
764 flags
= !(file
->f_flags
& O_NONBLOCK
) ? 0 : MSG_DONTWAIT
;
768 return kernel_sendpage(sock
, page
, offset
, size
, flags
);
771 static ssize_t
sock_splice_read(struct file
*file
, loff_t
*ppos
,
772 struct pipe_inode_info
*pipe
, size_t len
,
775 struct socket
*sock
= file
->private_data
;
777 if (unlikely(!sock
->ops
->splice_read
))
780 return sock
->ops
->splice_read(sock
, ppos
, pipe
, len
, flags
);
783 static struct sock_iocb
*alloc_sock_iocb(struct kiocb
*iocb
,
784 struct sock_iocb
*siocb
)
786 if (!is_sync_kiocb(iocb
)) {
787 siocb
= kmalloc(sizeof(*siocb
), GFP_KERNEL
);
790 iocb
->ki_dtor
= sock_aio_dtor
;
794 iocb
->private = siocb
;
798 static ssize_t
do_sock_read(struct msghdr
*msg
, struct kiocb
*iocb
,
799 struct file
*file
, const struct iovec
*iov
,
800 unsigned long nr_segs
)
802 struct socket
*sock
= file
->private_data
;
806 for (i
= 0; i
< nr_segs
; i
++)
807 size
+= iov
[i
].iov_len
;
809 msg
->msg_name
= NULL
;
810 msg
->msg_namelen
= 0;
811 msg
->msg_control
= NULL
;
812 msg
->msg_controllen
= 0;
813 msg
->msg_iov
= (struct iovec
*)iov
;
814 msg
->msg_iovlen
= nr_segs
;
815 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
817 return __sock_recvmsg(iocb
, sock
, msg
, size
, msg
->msg_flags
);
820 static ssize_t
sock_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
821 unsigned long nr_segs
, loff_t pos
)
823 struct sock_iocb siocb
, *x
;
828 if (iocb
->ki_left
== 0) /* Match SYS5 behaviour */
832 x
= alloc_sock_iocb(iocb
, &siocb
);
835 return do_sock_read(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
838 static ssize_t
do_sock_write(struct msghdr
*msg
, struct kiocb
*iocb
,
839 struct file
*file
, const struct iovec
*iov
,
840 unsigned long nr_segs
)
842 struct socket
*sock
= file
->private_data
;
846 for (i
= 0; i
< nr_segs
; i
++)
847 size
+= iov
[i
].iov_len
;
849 msg
->msg_name
= NULL
;
850 msg
->msg_namelen
= 0;
851 msg
->msg_control
= NULL
;
852 msg
->msg_controllen
= 0;
853 msg
->msg_iov
= (struct iovec
*)iov
;
854 msg
->msg_iovlen
= nr_segs
;
855 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
856 if (sock
->type
== SOCK_SEQPACKET
)
857 msg
->msg_flags
|= MSG_EOR
;
859 return __sock_sendmsg(iocb
, sock
, msg
, size
);
862 static ssize_t
sock_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
863 unsigned long nr_segs
, loff_t pos
)
865 struct sock_iocb siocb
, *x
;
870 x
= alloc_sock_iocb(iocb
, &siocb
);
874 return do_sock_write(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
878 * Atomic setting of ioctl hooks to avoid race
879 * with module unload.
882 static DEFINE_MUTEX(br_ioctl_mutex
);
883 static int (*br_ioctl_hook
) (struct net
*, unsigned int cmd
, void __user
*arg
) = NULL
;
885 void brioctl_set(int (*hook
) (struct net
*, unsigned int, void __user
*))
887 mutex_lock(&br_ioctl_mutex
);
888 br_ioctl_hook
= hook
;
889 mutex_unlock(&br_ioctl_mutex
);
892 EXPORT_SYMBOL(brioctl_set
);
894 static DEFINE_MUTEX(vlan_ioctl_mutex
);
895 static int (*vlan_ioctl_hook
) (struct net
*, void __user
*arg
);
897 void vlan_ioctl_set(int (*hook
) (struct net
*, void __user
*))
899 mutex_lock(&vlan_ioctl_mutex
);
900 vlan_ioctl_hook
= hook
;
901 mutex_unlock(&vlan_ioctl_mutex
);
904 EXPORT_SYMBOL(vlan_ioctl_set
);
906 static DEFINE_MUTEX(dlci_ioctl_mutex
);
907 static int (*dlci_ioctl_hook
) (unsigned int, void __user
*);
909 void dlci_ioctl_set(int (*hook
) (unsigned int, void __user
*))
911 mutex_lock(&dlci_ioctl_mutex
);
912 dlci_ioctl_hook
= hook
;
913 mutex_unlock(&dlci_ioctl_mutex
);
916 EXPORT_SYMBOL(dlci_ioctl_set
);
918 static long sock_do_ioctl(struct net
*net
, struct socket
*sock
,
919 unsigned int cmd
, unsigned long arg
)
922 void __user
*argp
= (void __user
*)arg
;
924 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
927 * If this ioctl is unknown try to hand it down
930 if (err
== -ENOIOCTLCMD
)
931 err
= dev_ioctl(net
, cmd
, argp
);
937 * With an ioctl, arg may well be a user mode pointer, but we don't know
938 * what to do with it - that's up to the protocol still.
941 static long sock_ioctl(struct file
*file
, unsigned cmd
, unsigned long arg
)
945 void __user
*argp
= (void __user
*)arg
;
949 sock
= file
->private_data
;
952 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15)) {
953 err
= dev_ioctl(net
, cmd
, argp
);
955 #ifdef CONFIG_WEXT_CORE
956 if (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
) {
957 err
= dev_ioctl(net
, cmd
, argp
);
964 if (get_user(pid
, (int __user
*)argp
))
966 err
= f_setown(sock
->file
, pid
, 1);
970 err
= put_user(f_getown(sock
->file
),
979 request_module("bridge");
981 mutex_lock(&br_ioctl_mutex
);
983 err
= br_ioctl_hook(net
, cmd
, argp
);
984 mutex_unlock(&br_ioctl_mutex
);
989 if (!vlan_ioctl_hook
)
990 request_module("8021q");
992 mutex_lock(&vlan_ioctl_mutex
);
994 err
= vlan_ioctl_hook(net
, argp
);
995 mutex_unlock(&vlan_ioctl_mutex
);
1000 if (!dlci_ioctl_hook
)
1001 request_module("dlci");
1003 mutex_lock(&dlci_ioctl_mutex
);
1004 if (dlci_ioctl_hook
)
1005 err
= dlci_ioctl_hook(cmd
, argp
);
1006 mutex_unlock(&dlci_ioctl_mutex
);
1009 err
= sock_do_ioctl(net
, sock
, cmd
, arg
);
1015 int sock_create_lite(int family
, int type
, int protocol
, struct socket
**res
)
1018 struct socket
*sock
= NULL
;
1020 err
= security_socket_create(family
, type
, protocol
, 1);
1024 sock
= sock_alloc();
1031 err
= security_socket_post_create(sock
, family
, type
, protocol
, 1);
1044 /* No kernel lock held - perfect */
1045 static unsigned int sock_poll(struct file
*file
, poll_table
*wait
)
1047 struct socket
*sock
;
1050 * We can't return errors to poll, so it's either yes or no.
1052 sock
= file
->private_data
;
1053 return sock
->ops
->poll(file
, sock
, wait
);
1056 static int sock_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1058 struct socket
*sock
= file
->private_data
;
1060 return sock
->ops
->mmap(file
, sock
, vma
);
1063 static int sock_close(struct inode
*inode
, struct file
*filp
)
1066 * It was possible the inode is NULL we were
1067 * closing an unfinished socket.
1071 printk(KERN_DEBUG
"sock_close: NULL inode\n");
1074 sock_release(SOCKET_I(inode
));
1079 * Update the socket async list
1081 * Fasync_list locking strategy.
1083 * 1. fasync_list is modified only under process context socket lock
1084 * i.e. under semaphore.
1085 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
1086 * or under socket lock
1089 static int sock_fasync(int fd
, struct file
*filp
, int on
)
1091 struct socket
*sock
= filp
->private_data
;
1092 struct sock
*sk
= sock
->sk
;
1099 fasync_helper(fd
, filp
, on
, &sock
->wq
->fasync_list
);
1101 if (!sock
->wq
->fasync_list
)
1102 sock_reset_flag(sk
, SOCK_FASYNC
);
1104 sock_set_flag(sk
, SOCK_FASYNC
);
1110 /* This function may be called only under socket lock or callback_lock or rcu_lock */
1112 int sock_wake_async(struct socket
*sock
, int how
, int band
)
1114 struct socket_wq
*wq
;
1119 wq
= rcu_dereference(sock
->wq
);
1120 if (!wq
|| !wq
->fasync_list
) {
1125 case SOCK_WAKE_WAITD
:
1126 if (test_bit(SOCK_ASYNC_WAITDATA
, &sock
->flags
))
1129 case SOCK_WAKE_SPACE
:
1130 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE
, &sock
->flags
))
1135 kill_fasync(&wq
->fasync_list
, SIGIO
, band
);
1138 kill_fasync(&wq
->fasync_list
, SIGURG
, band
);
1144 static int __sock_create(struct net
*net
, int family
, int type
, int protocol
,
1145 struct socket
**res
, int kern
)
1148 struct socket
*sock
;
1149 const struct net_proto_family
*pf
;
1152 * Check protocol is in range
1154 if (family
< 0 || family
>= NPROTO
)
1155 return -EAFNOSUPPORT
;
1156 if (type
< 0 || type
>= SOCK_MAX
)
1161 This uglymoron is moved from INET layer to here to avoid
1162 deadlock in module load.
1164 if (family
== PF_INET
&& type
== SOCK_PACKET
) {
1168 printk(KERN_INFO
"%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1174 err
= security_socket_create(family
, type
, protocol
, kern
);
1179 * Allocate the socket and allow the family to set things up. if
1180 * the protocol is 0, the family is instructed to select an appropriate
1183 sock
= sock_alloc();
1185 if (net_ratelimit())
1186 printk(KERN_WARNING
"socket: no more sockets\n");
1187 return -ENFILE
; /* Not exactly a match, but its the
1188 closest posix thing */
1193 #ifdef CONFIG_MODULES
1194 /* Attempt to load a protocol module if the find failed.
1196 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
1197 * requested real, full-featured networking support upon configuration.
1198 * Otherwise module support will break!
1200 if (net_families
[family
] == NULL
)
1201 request_module("net-pf-%d", family
);
1205 pf
= rcu_dereference(net_families
[family
]);
1206 err
= -EAFNOSUPPORT
;
1211 * We will call the ->create function, that possibly is in a loadable
1212 * module, so we have to bump that loadable module refcnt first.
1214 if (!try_module_get(pf
->owner
))
1217 /* Now protected by module ref count */
1220 err
= pf
->create(net
, sock
, protocol
, kern
);
1222 goto out_module_put
;
1225 * Now to bump the refcnt of the [loadable] module that owns this
1226 * socket at sock_release time we decrement its refcnt.
1228 if (!try_module_get(sock
->ops
->owner
))
1229 goto out_module_busy
;
1232 * Now that we're done with the ->create function, the [loadable]
1233 * module can have its refcnt decremented
1235 module_put(pf
->owner
);
1236 err
= security_socket_post_create(sock
, family
, type
, protocol
, kern
);
1238 goto out_sock_release
;
1244 err
= -EAFNOSUPPORT
;
1247 module_put(pf
->owner
);
1254 goto out_sock_release
;
1257 int sock_create(int family
, int type
, int protocol
, struct socket
**res
)
1259 return __sock_create(current
->nsproxy
->net_ns
, family
, type
, protocol
, res
, 0);
1262 int sock_create_kern(int family
, int type
, int protocol
, struct socket
**res
)
1264 return __sock_create(&init_net
, family
, type
, protocol
, res
, 1);
1267 SYSCALL_DEFINE3(socket
, int, family
, int, type
, int, protocol
)
1270 struct socket
*sock
;
1273 /* Check the SOCK_* constants for consistency. */
1274 BUILD_BUG_ON(SOCK_CLOEXEC
!= O_CLOEXEC
);
1275 BUILD_BUG_ON((SOCK_MAX
| SOCK_TYPE_MASK
) != SOCK_TYPE_MASK
);
1276 BUILD_BUG_ON(SOCK_CLOEXEC
& SOCK_TYPE_MASK
);
1277 BUILD_BUG_ON(SOCK_NONBLOCK
& SOCK_TYPE_MASK
);
1279 flags
= type
& ~SOCK_TYPE_MASK
;
1280 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1282 type
&= SOCK_TYPE_MASK
;
1284 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1285 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1287 retval
= sock_create(family
, type
, protocol
, &sock
);
1291 retval
= sock_map_fd(sock
, flags
& (O_CLOEXEC
| O_NONBLOCK
));
1296 /* It may be already another descriptor 8) Not kernel problem. */
1305 * Create a pair of connected sockets.
1308 SYSCALL_DEFINE4(socketpair
, int, family
, int, type
, int, protocol
,
1309 int __user
*, usockvec
)
1311 struct socket
*sock1
, *sock2
;
1313 struct file
*newfile1
, *newfile2
;
1316 flags
= type
& ~SOCK_TYPE_MASK
;
1317 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1319 type
&= SOCK_TYPE_MASK
;
1321 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1322 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1325 * Obtain the first socket and check if the underlying protocol
1326 * supports the socketpair call.
1329 err
= sock_create(family
, type
, protocol
, &sock1
);
1333 err
= sock_create(family
, type
, protocol
, &sock2
);
1337 err
= sock1
->ops
->socketpair(sock1
, sock2
);
1339 goto out_release_both
;
1341 fd1
= sock_alloc_file(sock1
, &newfile1
, flags
);
1342 if (unlikely(fd1
< 0)) {
1344 goto out_release_both
;
1347 fd2
= sock_alloc_file(sock2
, &newfile2
, flags
);
1348 if (unlikely(fd2
< 0)) {
1352 sock_release(sock2
);
1356 audit_fd_pair(fd1
, fd2
);
1357 fd_install(fd1
, newfile1
);
1358 fd_install(fd2
, newfile2
);
1359 /* fd1 and fd2 may be already another descriptors.
1360 * Not kernel problem.
1363 err
= put_user(fd1
, &usockvec
[0]);
1365 err
= put_user(fd2
, &usockvec
[1]);
1374 sock_release(sock2
);
1376 sock_release(sock1
);
1382 * Bind a name to a socket. Nothing much to do here since it's
1383 * the protocol's responsibility to handle the local address.
1385 * We move the socket address to kernel space before we call
1386 * the protocol layer (having also checked the address is ok).
1389 SYSCALL_DEFINE3(bind
, int, fd
, struct sockaddr __user
*, umyaddr
, int, addrlen
)
1391 struct socket
*sock
;
1392 struct sockaddr_storage address
;
1393 int err
, fput_needed
;
1395 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1397 err
= move_addr_to_kernel(umyaddr
, addrlen
, (struct sockaddr
*)&address
);
1399 err
= security_socket_bind(sock
,
1400 (struct sockaddr
*)&address
,
1403 err
= sock
->ops
->bind(sock
,
1407 fput_light(sock
->file
, fput_needed
);
1413 * Perform a listen. Basically, we allow the protocol to do anything
1414 * necessary for a listen, and if that works, we mark the socket as
1415 * ready for listening.
1418 SYSCALL_DEFINE2(listen
, int, fd
, int, backlog
)
1420 struct socket
*sock
;
1421 int err
, fput_needed
;
1424 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1426 somaxconn
= sock_net(sock
->sk
)->core
.sysctl_somaxconn
;
1427 if ((unsigned)backlog
> somaxconn
)
1428 backlog
= somaxconn
;
1430 err
= security_socket_listen(sock
, backlog
);
1432 err
= sock
->ops
->listen(sock
, backlog
);
1434 fput_light(sock
->file
, fput_needed
);
1440 * For accept, we attempt to create a new socket, set up the link
1441 * with the client, wake up the client, then return the new
1442 * connected fd. We collect the address of the connector in kernel
1443 * space and move it to user at the very end. This is unclean because
1444 * we open the socket then return an error.
1446 * 1003.1g adds the ability to recvmsg() to query connection pending
1447 * status to recvmsg. We need to add that support in a way thats
1448 * clean when we restucture accept also.
1451 SYSCALL_DEFINE4(accept4
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1452 int __user
*, upeer_addrlen
, int, flags
)
1454 struct socket
*sock
, *newsock
;
1455 struct file
*newfile
;
1456 int err
, len
, newfd
, fput_needed
;
1457 struct sockaddr_storage address
;
1459 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1462 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1463 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1465 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1470 if (!(newsock
= sock_alloc()))
1473 newsock
->type
= sock
->type
;
1474 newsock
->ops
= sock
->ops
;
1477 * We don't need try_module_get here, as the listening socket (sock)
1478 * has the protocol module (sock->ops->owner) held.
1480 __module_get(newsock
->ops
->owner
);
1482 newfd
= sock_alloc_file(newsock
, &newfile
, flags
);
1483 if (unlikely(newfd
< 0)) {
1485 sock_release(newsock
);
1489 err
= security_socket_accept(sock
, newsock
);
1493 err
= sock
->ops
->accept(sock
, newsock
, sock
->file
->f_flags
);
1497 if (upeer_sockaddr
) {
1498 if (newsock
->ops
->getname(newsock
, (struct sockaddr
*)&address
,
1500 err
= -ECONNABORTED
;
1503 err
= move_addr_to_user((struct sockaddr
*)&address
,
1504 len
, upeer_sockaddr
, upeer_addrlen
);
1509 /* File flags are not inherited via accept() unlike another OSes. */
1511 fd_install(newfd
, newfile
);
1515 fput_light(sock
->file
, fput_needed
);
1520 put_unused_fd(newfd
);
1524 SYSCALL_DEFINE3(accept
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1525 int __user
*, upeer_addrlen
)
1527 return sys_accept4(fd
, upeer_sockaddr
, upeer_addrlen
, 0);
1531 * Attempt to connect to a socket with the server address. The address
1532 * is in user space so we verify it is OK and move it to kernel space.
1534 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1537 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1538 * other SEQPACKET protocols that take time to connect() as it doesn't
1539 * include the -EINPROGRESS status for such sockets.
1542 SYSCALL_DEFINE3(connect
, int, fd
, struct sockaddr __user
*, uservaddr
,
1545 struct socket
*sock
;
1546 struct sockaddr_storage address
;
1547 int err
, fput_needed
;
1549 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1552 err
= move_addr_to_kernel(uservaddr
, addrlen
, (struct sockaddr
*)&address
);
1557 security_socket_connect(sock
, (struct sockaddr
*)&address
, addrlen
);
1561 err
= sock
->ops
->connect(sock
, (struct sockaddr
*)&address
, addrlen
,
1562 sock
->file
->f_flags
);
1564 fput_light(sock
->file
, fput_needed
);
1570 * Get the local address ('name') of a socket object. Move the obtained
1571 * name to user space.
1574 SYSCALL_DEFINE3(getsockname
, int, fd
, struct sockaddr __user
*, usockaddr
,
1575 int __user
*, usockaddr_len
)
1577 struct socket
*sock
;
1578 struct sockaddr_storage address
;
1579 int len
, err
, fput_needed
;
1581 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1585 err
= security_socket_getsockname(sock
);
1589 err
= sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
, 0);
1592 err
= move_addr_to_user((struct sockaddr
*)&address
, len
, usockaddr
, usockaddr_len
);
1595 fput_light(sock
->file
, fput_needed
);
1601 * Get the remote address ('name') of a socket object. Move the obtained
1602 * name to user space.
1605 SYSCALL_DEFINE3(getpeername
, int, fd
, struct sockaddr __user
*, usockaddr
,
1606 int __user
*, usockaddr_len
)
1608 struct socket
*sock
;
1609 struct sockaddr_storage address
;
1610 int len
, err
, fput_needed
;
1612 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1614 err
= security_socket_getpeername(sock
);
1616 fput_light(sock
->file
, fput_needed
);
1621 sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
,
1624 err
= move_addr_to_user((struct sockaddr
*)&address
, len
, usockaddr
,
1626 fput_light(sock
->file
, fput_needed
);
1632 * Send a datagram to a given address. We move the address into kernel
1633 * space and check the user space data area is readable before invoking
1637 SYSCALL_DEFINE6(sendto
, int, fd
, void __user
*, buff
, size_t, len
,
1638 unsigned, flags
, struct sockaddr __user
*, addr
,
1641 struct socket
*sock
;
1642 struct sockaddr_storage address
;
1648 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1652 iov
.iov_base
= buff
;
1654 msg
.msg_name
= NULL
;
1657 msg
.msg_control
= NULL
;
1658 msg
.msg_controllen
= 0;
1659 msg
.msg_namelen
= 0;
1661 err
= move_addr_to_kernel(addr
, addr_len
, (struct sockaddr
*)&address
);
1664 msg
.msg_name
= (struct sockaddr
*)&address
;
1665 msg
.msg_namelen
= addr_len
;
1667 if (sock
->file
->f_flags
& O_NONBLOCK
)
1668 flags
|= MSG_DONTWAIT
;
1669 msg
.msg_flags
= flags
;
1670 err
= sock_sendmsg(sock
, &msg
, len
);
1673 fput_light(sock
->file
, fput_needed
);
1679 * Send a datagram down a socket.
1682 SYSCALL_DEFINE4(send
, int, fd
, void __user
*, buff
, size_t, len
,
1685 return sys_sendto(fd
, buff
, len
, flags
, NULL
, 0);
1689 * Receive a frame from the socket and optionally record the address of the
1690 * sender. We verify the buffers are writable and if needed move the
1691 * sender address from kernel to user space.
1694 SYSCALL_DEFINE6(recvfrom
, int, fd
, void __user
*, ubuf
, size_t, size
,
1695 unsigned, flags
, struct sockaddr __user
*, addr
,
1696 int __user
*, addr_len
)
1698 struct socket
*sock
;
1701 struct sockaddr_storage address
;
1705 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1709 msg
.msg_control
= NULL
;
1710 msg
.msg_controllen
= 0;
1714 iov
.iov_base
= ubuf
;
1715 msg
.msg_name
= (struct sockaddr
*)&address
;
1716 msg
.msg_namelen
= sizeof(address
);
1717 if (sock
->file
->f_flags
& O_NONBLOCK
)
1718 flags
|= MSG_DONTWAIT
;
1719 err
= sock_recvmsg(sock
, &msg
, size
, flags
);
1721 if (err
>= 0 && addr
!= NULL
) {
1722 err2
= move_addr_to_user((struct sockaddr
*)&address
,
1723 msg
.msg_namelen
, addr
, addr_len
);
1728 fput_light(sock
->file
, fput_needed
);
1734 * Receive a datagram from a socket.
1737 asmlinkage
long sys_recv(int fd
, void __user
*ubuf
, size_t size
,
1740 return sys_recvfrom(fd
, ubuf
, size
, flags
, NULL
, NULL
);
1744 * Set a socket option. Because we don't know the option lengths we have
1745 * to pass the user mode parameter for the protocols to sort out.
1748 SYSCALL_DEFINE5(setsockopt
, int, fd
, int, level
, int, optname
,
1749 char __user
*, optval
, int, optlen
)
1751 int err
, fput_needed
;
1752 struct socket
*sock
;
1757 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1759 err
= security_socket_setsockopt(sock
, level
, optname
);
1763 if (level
== SOL_SOCKET
)
1765 sock_setsockopt(sock
, level
, optname
, optval
,
1769 sock
->ops
->setsockopt(sock
, level
, optname
, optval
,
1772 fput_light(sock
->file
, fput_needed
);
1778 * Get a socket option. Because we don't know the option lengths we have
1779 * to pass a user mode parameter for the protocols to sort out.
1782 SYSCALL_DEFINE5(getsockopt
, int, fd
, int, level
, int, optname
,
1783 char __user
*, optval
, int __user
*, optlen
)
1785 int err
, fput_needed
;
1786 struct socket
*sock
;
1788 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1790 err
= security_socket_getsockopt(sock
, level
, optname
);
1794 if (level
== SOL_SOCKET
)
1796 sock_getsockopt(sock
, level
, optname
, optval
,
1800 sock
->ops
->getsockopt(sock
, level
, optname
, optval
,
1803 fput_light(sock
->file
, fput_needed
);
1809 * Shutdown a socket.
1812 SYSCALL_DEFINE2(shutdown
, int, fd
, int, how
)
1814 int err
, fput_needed
;
1815 struct socket
*sock
;
1817 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1819 err
= security_socket_shutdown(sock
, how
);
1821 err
= sock
->ops
->shutdown(sock
, how
);
1822 fput_light(sock
->file
, fput_needed
);
1827 /* A couple of helpful macros for getting the address of the 32/64 bit
1828 * fields which are the same type (int / unsigned) on our platforms.
1830 #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1831 #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1832 #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1835 * BSD sendmsg interface
1838 SYSCALL_DEFINE3(sendmsg
, int, fd
, struct msghdr __user
*, msg
, unsigned, flags
)
1840 struct compat_msghdr __user
*msg_compat
=
1841 (struct compat_msghdr __user
*)msg
;
1842 struct socket
*sock
;
1843 struct sockaddr_storage address
;
1844 struct iovec iovstack
[UIO_FASTIOV
], *iov
= iovstack
;
1845 unsigned char ctl
[sizeof(struct cmsghdr
) + 20]
1846 __attribute__ ((aligned(sizeof(__kernel_size_t
))));
1847 /* 20 is size of ipv6_pktinfo */
1848 unsigned char *ctl_buf
= ctl
;
1849 struct msghdr msg_sys
;
1850 int err
, ctl_len
, iov_size
, total_len
;
1854 if (MSG_CMSG_COMPAT
& flags
) {
1855 if (get_compat_msghdr(&msg_sys
, msg_compat
))
1858 else if (copy_from_user(&msg_sys
, msg
, sizeof(struct msghdr
)))
1861 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1865 /* do not move before msg_sys is valid */
1867 if (msg_sys
.msg_iovlen
> UIO_MAXIOV
)
1870 /* Check whether to allocate the iovec area */
1872 iov_size
= msg_sys
.msg_iovlen
* sizeof(struct iovec
);
1873 if (msg_sys
.msg_iovlen
> UIO_FASTIOV
) {
1874 iov
= sock_kmalloc(sock
->sk
, iov_size
, GFP_KERNEL
);
1879 /* This will also move the address data into kernel space */
1880 if (MSG_CMSG_COMPAT
& flags
) {
1881 err
= verify_compat_iovec(&msg_sys
, iov
,
1882 (struct sockaddr
*)&address
,
1885 err
= verify_iovec(&msg_sys
, iov
,
1886 (struct sockaddr
*)&address
,
1894 if (msg_sys
.msg_controllen
> INT_MAX
)
1896 ctl_len
= msg_sys
.msg_controllen
;
1897 if ((MSG_CMSG_COMPAT
& flags
) && ctl_len
) {
1899 cmsghdr_from_user_compat_to_kern(&msg_sys
, sock
->sk
, ctl
,
1903 ctl_buf
= msg_sys
.msg_control
;
1904 ctl_len
= msg_sys
.msg_controllen
;
1905 } else if (ctl_len
) {
1906 if (ctl_len
> sizeof(ctl
)) {
1907 ctl_buf
= sock_kmalloc(sock
->sk
, ctl_len
, GFP_KERNEL
);
1908 if (ctl_buf
== NULL
)
1913 * Careful! Before this, msg_sys.msg_control contains a user pointer.
1914 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
1915 * checking falls down on this.
1917 if (copy_from_user(ctl_buf
, (void __user
*)msg_sys
.msg_control
,
1920 msg_sys
.msg_control
= ctl_buf
;
1922 msg_sys
.msg_flags
= flags
;
1924 if (sock
->file
->f_flags
& O_NONBLOCK
)
1925 msg_sys
.msg_flags
|= MSG_DONTWAIT
;
1926 err
= sock_sendmsg(sock
, &msg_sys
, total_len
);
1930 sock_kfree_s(sock
->sk
, ctl_buf
, ctl_len
);
1932 if (iov
!= iovstack
)
1933 sock_kfree_s(sock
->sk
, iov
, iov_size
);
1935 fput_light(sock
->file
, fput_needed
);
1940 static int __sys_recvmsg(struct socket
*sock
, struct msghdr __user
*msg
,
1941 struct msghdr
*msg_sys
, unsigned flags
, int nosec
)
1943 struct compat_msghdr __user
*msg_compat
=
1944 (struct compat_msghdr __user
*)msg
;
1945 struct iovec iovstack
[UIO_FASTIOV
];
1946 struct iovec
*iov
= iovstack
;
1947 unsigned long cmsg_ptr
;
1948 int err
, iov_size
, total_len
, len
;
1950 /* kernel mode address */
1951 struct sockaddr_storage addr
;
1953 /* user mode address pointers */
1954 struct sockaddr __user
*uaddr
;
1955 int __user
*uaddr_len
;
1957 if (MSG_CMSG_COMPAT
& flags
) {
1958 if (get_compat_msghdr(msg_sys
, msg_compat
))
1961 else if (copy_from_user(msg_sys
, msg
, sizeof(struct msghdr
)))
1965 if (msg_sys
->msg_iovlen
> UIO_MAXIOV
)
1968 /* Check whether to allocate the iovec area */
1970 iov_size
= msg_sys
->msg_iovlen
* sizeof(struct iovec
);
1971 if (msg_sys
->msg_iovlen
> UIO_FASTIOV
) {
1972 iov
= sock_kmalloc(sock
->sk
, iov_size
, GFP_KERNEL
);
1978 * Save the user-mode address (verify_iovec will change the
1979 * kernel msghdr to use the kernel address space)
1982 uaddr
= (__force
void __user
*)msg_sys
->msg_name
;
1983 uaddr_len
= COMPAT_NAMELEN(msg
);
1984 if (MSG_CMSG_COMPAT
& flags
) {
1985 err
= verify_compat_iovec(msg_sys
, iov
,
1986 (struct sockaddr
*)&addr
,
1989 err
= verify_iovec(msg_sys
, iov
,
1990 (struct sockaddr
*)&addr
,
1996 cmsg_ptr
= (unsigned long)msg_sys
->msg_control
;
1997 msg_sys
->msg_flags
= flags
& (MSG_CMSG_CLOEXEC
|MSG_CMSG_COMPAT
);
1999 if (sock
->file
->f_flags
& O_NONBLOCK
)
2000 flags
|= MSG_DONTWAIT
;
2001 err
= (nosec
? sock_recvmsg_nosec
: sock_recvmsg
)(sock
, msg_sys
,
2007 if (uaddr
!= NULL
) {
2008 err
= move_addr_to_user((struct sockaddr
*)&addr
,
2009 msg_sys
->msg_namelen
, uaddr
,
2014 err
= __put_user((msg_sys
->msg_flags
& ~MSG_CMSG_COMPAT
),
2018 if (MSG_CMSG_COMPAT
& flags
)
2019 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2020 &msg_compat
->msg_controllen
);
2022 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2023 &msg
->msg_controllen
);
2029 if (iov
!= iovstack
)
2030 sock_kfree_s(sock
->sk
, iov
, iov_size
);
2036 * BSD recvmsg interface
2039 SYSCALL_DEFINE3(recvmsg
, int, fd
, struct msghdr __user
*, msg
,
2040 unsigned int, flags
)
2042 int fput_needed
, err
;
2043 struct msghdr msg_sys
;
2044 struct socket
*sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2049 err
= __sys_recvmsg(sock
, msg
, &msg_sys
, flags
, 0);
2051 fput_light(sock
->file
, fput_needed
);
2057 * Linux recvmmsg interface
2060 int __sys_recvmmsg(int fd
, struct mmsghdr __user
*mmsg
, unsigned int vlen
,
2061 unsigned int flags
, struct timespec
*timeout
)
2063 int fput_needed
, err
, datagrams
;
2064 struct socket
*sock
;
2065 struct mmsghdr __user
*entry
;
2066 struct compat_mmsghdr __user
*compat_entry
;
2067 struct msghdr msg_sys
;
2068 struct timespec end_time
;
2071 poll_select_set_timeout(&end_time
, timeout
->tv_sec
,
2077 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2081 err
= sock_error(sock
->sk
);
2086 compat_entry
= (struct compat_mmsghdr __user
*)mmsg
;
2088 while (datagrams
< vlen
) {
2090 * No need to ask LSM for more than the first datagram.
2092 if (MSG_CMSG_COMPAT
& flags
) {
2093 err
= __sys_recvmsg(sock
, (struct msghdr __user
*)compat_entry
,
2094 &msg_sys
, flags
, datagrams
);
2097 err
= __put_user(err
, &compat_entry
->msg_len
);
2100 err
= __sys_recvmsg(sock
, (struct msghdr __user
*)entry
,
2101 &msg_sys
, flags
, datagrams
);
2104 err
= put_user(err
, &entry
->msg_len
);
2112 /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
2113 if (flags
& MSG_WAITFORONE
)
2114 flags
|= MSG_DONTWAIT
;
2117 ktime_get_ts(timeout
);
2118 *timeout
= timespec_sub(end_time
, *timeout
);
2119 if (timeout
->tv_sec
< 0) {
2120 timeout
->tv_sec
= timeout
->tv_nsec
= 0;
2124 /* Timeout, return less than vlen datagrams */
2125 if (timeout
->tv_nsec
== 0 && timeout
->tv_sec
== 0)
2129 /* Out of band data, return right away */
2130 if (msg_sys
.msg_flags
& MSG_OOB
)
2135 fput_light(sock
->file
, fput_needed
);
2140 if (datagrams
!= 0) {
2142 * We may return less entries than requested (vlen) if the
2143 * sock is non block and there aren't enough datagrams...
2145 if (err
!= -EAGAIN
) {
2147 * ... or if recvmsg returns an error after we
2148 * received some datagrams, where we record the
2149 * error to return on the next call or if the
2150 * app asks about it using getsockopt(SO_ERROR).
2152 sock
->sk
->sk_err
= -err
;
2161 SYSCALL_DEFINE5(recvmmsg
, int, fd
, struct mmsghdr __user
*, mmsg
,
2162 unsigned int, vlen
, unsigned int, flags
,
2163 struct timespec __user
*, timeout
)
2166 struct timespec timeout_sys
;
2169 return __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, NULL
);
2171 if (copy_from_user(&timeout_sys
, timeout
, sizeof(timeout_sys
)))
2174 datagrams
= __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, &timeout_sys
);
2176 if (datagrams
> 0 &&
2177 copy_to_user(timeout
, &timeout_sys
, sizeof(timeout_sys
)))
2178 datagrams
= -EFAULT
;
2183 #ifdef __ARCH_WANT_SYS_SOCKETCALL
2184 /* Argument list sizes for sys_socketcall */
2185 #define AL(x) ((x) * sizeof(unsigned long))
2186 static const unsigned char nargs
[20] = {
2187 AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
2188 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
2189 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3),
2196 * System call vectors.
2198 * Argument checking cleaned up. Saved 20% in size.
2199 * This function doesn't need to set the kernel lock because
2200 * it is set by the callees.
2203 SYSCALL_DEFINE2(socketcall
, int, call
, unsigned long __user
*, args
)
2206 unsigned long a0
, a1
;
2210 if (call
< 1 || call
> SYS_RECVMMSG
)
2214 if (len
> sizeof(a
))
2217 /* copy_from_user should be SMP safe. */
2218 if (copy_from_user(a
, args
, len
))
2221 audit_socketcall(nargs
[call
] / sizeof(unsigned long), a
);
2228 err
= sys_socket(a0
, a1
, a
[2]);
2231 err
= sys_bind(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2234 err
= sys_connect(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2237 err
= sys_listen(a0
, a1
);
2240 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2241 (int __user
*)a
[2], 0);
2243 case SYS_GETSOCKNAME
:
2245 sys_getsockname(a0
, (struct sockaddr __user
*)a1
,
2246 (int __user
*)a
[2]);
2248 case SYS_GETPEERNAME
:
2250 sys_getpeername(a0
, (struct sockaddr __user
*)a1
,
2251 (int __user
*)a
[2]);
2253 case SYS_SOCKETPAIR
:
2254 err
= sys_socketpair(a0
, a1
, a
[2], (int __user
*)a
[3]);
2257 err
= sys_send(a0
, (void __user
*)a1
, a
[2], a
[3]);
2260 err
= sys_sendto(a0
, (void __user
*)a1
, a
[2], a
[3],
2261 (struct sockaddr __user
*)a
[4], a
[5]);
2264 err
= sys_recv(a0
, (void __user
*)a1
, a
[2], a
[3]);
2267 err
= sys_recvfrom(a0
, (void __user
*)a1
, a
[2], a
[3],
2268 (struct sockaddr __user
*)a
[4],
2269 (int __user
*)a
[5]);
2272 err
= sys_shutdown(a0
, a1
);
2274 case SYS_SETSOCKOPT
:
2275 err
= sys_setsockopt(a0
, a1
, a
[2], (char __user
*)a
[3], a
[4]);
2277 case SYS_GETSOCKOPT
:
2279 sys_getsockopt(a0
, a1
, a
[2], (char __user
*)a
[3],
2280 (int __user
*)a
[4]);
2283 err
= sys_sendmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2286 err
= sys_recvmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2289 err
= sys_recvmmsg(a0
, (struct mmsghdr __user
*)a1
, a
[2], a
[3],
2290 (struct timespec __user
*)a
[4]);
2293 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2294 (int __user
*)a
[2], a
[3]);
2303 #endif /* __ARCH_WANT_SYS_SOCKETCALL */
2306 * sock_register - add a socket protocol handler
2307 * @ops: description of protocol
2309 * This function is called by a protocol handler that wants to
2310 * advertise its address family, and have it linked into the
2311 * socket interface. The value ops->family coresponds to the
2312 * socket system call protocol family.
2314 int sock_register(const struct net_proto_family
*ops
)
2318 if (ops
->family
>= NPROTO
) {
2319 printk(KERN_CRIT
"protocol %d >= NPROTO(%d)\n", ops
->family
,
2324 spin_lock(&net_family_lock
);
2325 if (net_families
[ops
->family
])
2328 net_families
[ops
->family
] = ops
;
2331 spin_unlock(&net_family_lock
);
2333 printk(KERN_INFO
"NET: Registered protocol family %d\n", ops
->family
);
2338 * sock_unregister - remove a protocol handler
2339 * @family: protocol family to remove
2341 * This function is called by a protocol handler that wants to
2342 * remove its address family, and have it unlinked from the
2343 * new socket creation.
2345 * If protocol handler is a module, then it can use module reference
2346 * counts to protect against new references. If protocol handler is not
2347 * a module then it needs to provide its own protection in
2348 * the ops->create routine.
2350 void sock_unregister(int family
)
2352 BUG_ON(family
< 0 || family
>= NPROTO
);
2354 spin_lock(&net_family_lock
);
2355 net_families
[family
] = NULL
;
2356 spin_unlock(&net_family_lock
);
2360 printk(KERN_INFO
"NET: Unregistered protocol family %d\n", family
);
2363 static int __init
sock_init(void)
2366 * Initialize sock SLAB cache.
2372 * Initialize skbuff SLAB cache
2377 * Initialize the protocols module.
2381 register_filesystem(&sock_fs_type
);
2382 sock_mnt
= kern_mount(&sock_fs_type
);
2384 /* The real protocol initialization is performed in later initcalls.
2387 #ifdef CONFIG_NETFILTER
2394 core_initcall(sock_init
); /* early initcall */
2396 #ifdef CONFIG_PROC_FS
2397 void socket_seq_show(struct seq_file
*seq
)
2402 for_each_possible_cpu(cpu
)
2403 counter
+= per_cpu(sockets_in_use
, cpu
);
2405 /* It can be negative, by the way. 8) */
2409 seq_printf(seq
, "sockets: used %d\n", counter
);
2411 #endif /* CONFIG_PROC_FS */
2413 #ifdef CONFIG_COMPAT
2414 static int do_siocgstamp(struct net
*net
, struct socket
*sock
,
2415 unsigned int cmd
, struct compat_timeval __user
*up
)
2417 mm_segment_t old_fs
= get_fs();
2422 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&ktv
);
2425 err
= put_user(ktv
.tv_sec
, &up
->tv_sec
);
2426 err
|= __put_user(ktv
.tv_usec
, &up
->tv_usec
);
2431 static int do_siocgstampns(struct net
*net
, struct socket
*sock
,
2432 unsigned int cmd
, struct compat_timespec __user
*up
)
2434 mm_segment_t old_fs
= get_fs();
2435 struct timespec kts
;
2439 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&kts
);
2442 err
= put_user(kts
.tv_sec
, &up
->tv_sec
);
2443 err
|= __put_user(kts
.tv_nsec
, &up
->tv_nsec
);
2448 static int dev_ifname32(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2450 struct ifreq __user
*uifr
;
2453 uifr
= compat_alloc_user_space(sizeof(struct ifreq
));
2454 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2457 err
= dev_ioctl(net
, SIOCGIFNAME
, uifr
);
2461 if (copy_in_user(uifr32
, uifr
, sizeof(struct compat_ifreq
)))
2467 static int dev_ifconf(struct net
*net
, struct compat_ifconf __user
*uifc32
)
2469 struct compat_ifconf ifc32
;
2471 struct ifconf __user
*uifc
;
2472 struct compat_ifreq __user
*ifr32
;
2473 struct ifreq __user
*ifr
;
2477 if (copy_from_user(&ifc32
, uifc32
, sizeof(struct compat_ifconf
)))
2480 if (ifc32
.ifcbuf
== 0) {
2484 uifc
= compat_alloc_user_space(sizeof(struct ifconf
));
2486 size_t len
=((ifc32
.ifc_len
/ sizeof (struct compat_ifreq
)) + 1) *
2487 sizeof (struct ifreq
);
2488 uifc
= compat_alloc_user_space(sizeof(struct ifconf
) + len
);
2490 ifr
= ifc
.ifc_req
= (void __user
*)(uifc
+ 1);
2491 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2492 for (i
= 0; i
< ifc32
.ifc_len
; i
+= sizeof (struct compat_ifreq
)) {
2493 if (copy_in_user(ifr
, ifr32
, sizeof(struct compat_ifreq
)))
2499 if (copy_to_user(uifc
, &ifc
, sizeof(struct ifconf
)))
2502 err
= dev_ioctl(net
, SIOCGIFCONF
, uifc
);
2506 if (copy_from_user(&ifc
, uifc
, sizeof(struct ifconf
)))
2510 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2512 i
+ sizeof (struct compat_ifreq
) <= ifc32
.ifc_len
&& j
< ifc
.ifc_len
;
2513 i
+= sizeof (struct compat_ifreq
), j
+= sizeof (struct ifreq
)) {
2514 if (copy_in_user(ifr32
, ifr
, sizeof (struct compat_ifreq
)))
2520 if (ifc32
.ifcbuf
== 0) {
2521 /* Translate from 64-bit structure multiple to
2525 i
= ((i
/ sizeof(struct ifreq
)) * sizeof(struct compat_ifreq
));
2530 if (copy_to_user(uifc32
, &ifc32
, sizeof(struct compat_ifconf
)))
2536 static int ethtool_ioctl(struct net
*net
, struct compat_ifreq __user
*ifr32
)
2538 struct ifreq __user
*ifr
;
2542 ifr
= compat_alloc_user_space(sizeof(*ifr
));
2544 if (copy_in_user(&ifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2547 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2550 datap
= compat_ptr(data
);
2551 if (put_user(datap
, &ifr
->ifr_ifru
.ifru_data
))
2554 return dev_ioctl(net
, SIOCETHTOOL
, ifr
);
2557 static int compat_siocwandev(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2560 compat_uptr_t uptr32
;
2561 struct ifreq __user
*uifr
;
2563 uifr
= compat_alloc_user_space(sizeof (*uifr
));
2564 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2567 if (get_user(uptr32
, &uifr32
->ifr_settings
.ifs_ifsu
))
2570 uptr
= compat_ptr(uptr32
);
2572 if (put_user(uptr
, &uifr
->ifr_settings
.ifs_ifsu
.raw_hdlc
))
2575 return dev_ioctl(net
, SIOCWANDEV
, uifr
);
2578 static int bond_ioctl(struct net
*net
, unsigned int cmd
,
2579 struct compat_ifreq __user
*ifr32
)
2582 struct ifreq __user
*uifr
;
2583 mm_segment_t old_fs
;
2589 case SIOCBONDENSLAVE
:
2590 case SIOCBONDRELEASE
:
2591 case SIOCBONDSETHWADDR
:
2592 case SIOCBONDCHANGEACTIVE
:
2593 if (copy_from_user(&kifr
, ifr32
, sizeof(struct compat_ifreq
)))
2598 err
= dev_ioctl(net
, cmd
, &kifr
);
2602 case SIOCBONDSLAVEINFOQUERY
:
2603 case SIOCBONDINFOQUERY
:
2604 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2605 if (copy_in_user(&uifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2608 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2611 datap
= compat_ptr(data
);
2612 if (put_user(datap
, &uifr
->ifr_ifru
.ifru_data
))
2615 return dev_ioctl(net
, cmd
, uifr
);
2621 static int siocdevprivate_ioctl(struct net
*net
, unsigned int cmd
,
2622 struct compat_ifreq __user
*u_ifreq32
)
2624 struct ifreq __user
*u_ifreq64
;
2625 char tmp_buf
[IFNAMSIZ
];
2626 void __user
*data64
;
2629 if (copy_from_user(&tmp_buf
[0], &(u_ifreq32
->ifr_ifrn
.ifrn_name
[0]),
2632 if (__get_user(data32
, &u_ifreq32
->ifr_ifru
.ifru_data
))
2634 data64
= compat_ptr(data32
);
2636 u_ifreq64
= compat_alloc_user_space(sizeof(*u_ifreq64
));
2638 /* Don't check these user accesses, just let that get trapped
2639 * in the ioctl handler instead.
2641 if (copy_to_user(&u_ifreq64
->ifr_ifrn
.ifrn_name
[0], &tmp_buf
[0],
2644 if (__put_user(data64
, &u_ifreq64
->ifr_ifru
.ifru_data
))
2647 return dev_ioctl(net
, cmd
, u_ifreq64
);
2650 static int dev_ifsioc(struct net
*net
, struct socket
*sock
,
2651 unsigned int cmd
, struct compat_ifreq __user
*uifr32
)
2653 struct ifreq __user
*uifr
;
2656 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2657 if (copy_in_user(uifr
, uifr32
, sizeof(*uifr32
)))
2660 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)uifr
);
2671 case SIOCGIFBRDADDR
:
2672 case SIOCGIFDSTADDR
:
2673 case SIOCGIFNETMASK
:
2678 if (copy_in_user(uifr32
, uifr
, sizeof(*uifr32
)))
2686 static int compat_sioc_ifmap(struct net
*net
, unsigned int cmd
,
2687 struct compat_ifreq __user
*uifr32
)
2690 struct compat_ifmap __user
*uifmap32
;
2691 mm_segment_t old_fs
;
2694 uifmap32
= &uifr32
->ifr_ifru
.ifru_map
;
2695 err
= copy_from_user(&ifr
, uifr32
, sizeof(ifr
.ifr_name
));
2696 err
|= __get_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
2697 err
|= __get_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
2698 err
|= __get_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
2699 err
|= __get_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
2700 err
|= __get_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
2701 err
|= __get_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
2707 err
= dev_ioctl(net
, cmd
, (void __user
*)&ifr
);
2710 if (cmd
== SIOCGIFMAP
&& !err
) {
2711 err
= copy_to_user(uifr32
, &ifr
, sizeof(ifr
.ifr_name
));
2712 err
|= __put_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
2713 err
|= __put_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
2714 err
|= __put_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
2715 err
|= __put_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
2716 err
|= __put_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
2717 err
|= __put_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
2724 static int compat_siocshwtstamp(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2727 compat_uptr_t uptr32
;
2728 struct ifreq __user
*uifr
;
2730 uifr
= compat_alloc_user_space(sizeof (*uifr
));
2731 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2734 if (get_user(uptr32
, &uifr32
->ifr_data
))
2737 uptr
= compat_ptr(uptr32
);
2739 if (put_user(uptr
, &uifr
->ifr_data
))
2742 return dev_ioctl(net
, SIOCSHWTSTAMP
, uifr
);
2747 struct sockaddr rt_dst
; /* target address */
2748 struct sockaddr rt_gateway
; /* gateway addr (RTF_GATEWAY) */
2749 struct sockaddr rt_genmask
; /* target network mask (IP) */
2750 unsigned short rt_flags
;
2753 unsigned char rt_tos
;
2754 unsigned char rt_class
;
2756 short rt_metric
; /* +1 for binary compatibility! */
2757 /* char * */ u32 rt_dev
; /* forcing the device at add */
2758 u32 rt_mtu
; /* per route MTU/Window */
2759 u32 rt_window
; /* Window clamping */
2760 unsigned short rt_irtt
; /* Initial RTT */
2763 struct in6_rtmsg32
{
2764 struct in6_addr rtmsg_dst
;
2765 struct in6_addr rtmsg_src
;
2766 struct in6_addr rtmsg_gateway
;
2776 static int routing_ioctl(struct net
*net
, struct socket
*sock
,
2777 unsigned int cmd
, void __user
*argp
)
2781 struct in6_rtmsg r6
;
2785 mm_segment_t old_fs
= get_fs();
2787 if (sock
&& sock
->sk
&& sock
->sk
->sk_family
== AF_INET6
) { /* ipv6 */
2788 struct in6_rtmsg32 __user
*ur6
= argp
;
2789 ret
= copy_from_user (&r6
.rtmsg_dst
, &(ur6
->rtmsg_dst
),
2790 3 * sizeof(struct in6_addr
));
2791 ret
|= __get_user (r6
.rtmsg_type
, &(ur6
->rtmsg_type
));
2792 ret
|= __get_user (r6
.rtmsg_dst_len
, &(ur6
->rtmsg_dst_len
));
2793 ret
|= __get_user (r6
.rtmsg_src_len
, &(ur6
->rtmsg_src_len
));
2794 ret
|= __get_user (r6
.rtmsg_metric
, &(ur6
->rtmsg_metric
));
2795 ret
|= __get_user (r6
.rtmsg_info
, &(ur6
->rtmsg_info
));
2796 ret
|= __get_user (r6
.rtmsg_flags
, &(ur6
->rtmsg_flags
));
2797 ret
|= __get_user (r6
.rtmsg_ifindex
, &(ur6
->rtmsg_ifindex
));
2801 struct rtentry32 __user
*ur4
= argp
;
2802 ret
= copy_from_user (&r4
.rt_dst
, &(ur4
->rt_dst
),
2803 3 * sizeof(struct sockaddr
));
2804 ret
|= __get_user (r4
.rt_flags
, &(ur4
->rt_flags
));
2805 ret
|= __get_user (r4
.rt_metric
, &(ur4
->rt_metric
));
2806 ret
|= __get_user (r4
.rt_mtu
, &(ur4
->rt_mtu
));
2807 ret
|= __get_user (r4
.rt_window
, &(ur4
->rt_window
));
2808 ret
|= __get_user (r4
.rt_irtt
, &(ur4
->rt_irtt
));
2809 ret
|= __get_user (rtdev
, &(ur4
->rt_dev
));
2811 ret
|= copy_from_user (devname
, compat_ptr(rtdev
), 15);
2812 r4
.rt_dev
= devname
; devname
[15] = 0;
2825 ret
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long) r
);
2832 /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
2833 * for some operations; this forces use of the newer bridge-utils that
2834 * use compatiable ioctls
2836 static int old_bridge_ioctl(compat_ulong_t __user
*argp
)
2840 if (get_user(tmp
, argp
))
2842 if (tmp
== BRCTL_GET_VERSION
)
2843 return BRCTL_VERSION
+ 1;
2847 static int compat_sock_ioctl_trans(struct file
*file
, struct socket
*sock
,
2848 unsigned int cmd
, unsigned long arg
)
2850 void __user
*argp
= compat_ptr(arg
);
2851 struct sock
*sk
= sock
->sk
;
2852 struct net
*net
= sock_net(sk
);
2854 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15))
2855 return siocdevprivate_ioctl(net
, cmd
, argp
);
2860 return old_bridge_ioctl(argp
);
2862 return dev_ifname32(net
, argp
);
2864 return dev_ifconf(net
, argp
);
2866 return ethtool_ioctl(net
, argp
);
2868 return compat_siocwandev(net
, argp
);
2871 return compat_sioc_ifmap(net
, cmd
, argp
);
2872 case SIOCBONDENSLAVE
:
2873 case SIOCBONDRELEASE
:
2874 case SIOCBONDSETHWADDR
:
2875 case SIOCBONDSLAVEINFOQUERY
:
2876 case SIOCBONDINFOQUERY
:
2877 case SIOCBONDCHANGEACTIVE
:
2878 return bond_ioctl(net
, cmd
, argp
);
2881 return routing_ioctl(net
, sock
, cmd
, argp
);
2883 return do_siocgstamp(net
, sock
, cmd
, argp
);
2885 return do_siocgstampns(net
, sock
, cmd
, argp
);
2887 return compat_siocshwtstamp(net
, argp
);
2899 return sock_ioctl(file
, cmd
, arg
);
2916 case SIOCSIFHWBROADCAST
:
2918 case SIOCGIFBRDADDR
:
2919 case SIOCSIFBRDADDR
:
2920 case SIOCGIFDSTADDR
:
2921 case SIOCSIFDSTADDR
:
2922 case SIOCGIFNETMASK
:
2923 case SIOCSIFNETMASK
:
2934 return dev_ifsioc(net
, sock
, cmd
, argp
);
2940 return sock_do_ioctl(net
, sock
, cmd
, arg
);
2943 /* Prevent warning from compat_sys_ioctl, these always
2944 * result in -EINVAL in the native case anyway. */
2957 return -ENOIOCTLCMD
;
2960 static long compat_sock_ioctl(struct file
*file
, unsigned cmd
,
2963 struct socket
*sock
= file
->private_data
;
2964 int ret
= -ENOIOCTLCMD
;
2971 if (sock
->ops
->compat_ioctl
)
2972 ret
= sock
->ops
->compat_ioctl(sock
, cmd
, arg
);
2974 if (ret
== -ENOIOCTLCMD
&&
2975 (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
))
2976 ret
= compat_wext_handle_ioctl(net
, cmd
, arg
);
2978 if (ret
== -ENOIOCTLCMD
)
2979 ret
= compat_sock_ioctl_trans(file
, sock
, cmd
, arg
);
2985 int kernel_bind(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
)
2987 return sock
->ops
->bind(sock
, addr
, addrlen
);
2990 int kernel_listen(struct socket
*sock
, int backlog
)
2992 return sock
->ops
->listen(sock
, backlog
);
2995 int kernel_accept(struct socket
*sock
, struct socket
**newsock
, int flags
)
2997 struct sock
*sk
= sock
->sk
;
3000 err
= sock_create_lite(sk
->sk_family
, sk
->sk_type
, sk
->sk_protocol
,
3005 err
= sock
->ops
->accept(sock
, *newsock
, flags
);
3007 sock_release(*newsock
);
3012 (*newsock
)->ops
= sock
->ops
;
3013 __module_get((*newsock
)->ops
->owner
);
3019 int kernel_connect(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
,
3022 return sock
->ops
->connect(sock
, addr
, addrlen
, flags
);
3025 int kernel_getsockname(struct socket
*sock
, struct sockaddr
*addr
,
3028 return sock
->ops
->getname(sock
, addr
, addrlen
, 0);
3031 int kernel_getpeername(struct socket
*sock
, struct sockaddr
*addr
,
3034 return sock
->ops
->getname(sock
, addr
, addrlen
, 1);
3037 int kernel_getsockopt(struct socket
*sock
, int level
, int optname
,
3038 char *optval
, int *optlen
)
3040 mm_segment_t oldfs
= get_fs();
3044 if (level
== SOL_SOCKET
)
3045 err
= sock_getsockopt(sock
, level
, optname
, optval
, optlen
);
3047 err
= sock
->ops
->getsockopt(sock
, level
, optname
, optval
,
3053 int kernel_setsockopt(struct socket
*sock
, int level
, int optname
,
3054 char *optval
, unsigned int optlen
)
3056 mm_segment_t oldfs
= get_fs();
3060 if (level
== SOL_SOCKET
)
3061 err
= sock_setsockopt(sock
, level
, optname
, optval
, optlen
);
3063 err
= sock
->ops
->setsockopt(sock
, level
, optname
, optval
,
3069 int kernel_sendpage(struct socket
*sock
, struct page
*page
, int offset
,
3070 size_t size
, int flags
)
3072 if (sock
->ops
->sendpage
)
3073 return sock
->ops
->sendpage(sock
, page
, offset
, size
, flags
);
3075 return sock_no_sendpage(sock
, page
, offset
, size
, flags
);
3078 int kernel_sock_ioctl(struct socket
*sock
, int cmd
, unsigned long arg
)
3080 mm_segment_t oldfs
= get_fs();
3084 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
3090 int kernel_sock_shutdown(struct socket
*sock
, enum sock_shutdown_cmd how
)
3092 return sock
->ops
->shutdown(sock
, how
);
3095 EXPORT_SYMBOL(sock_create
);
3096 EXPORT_SYMBOL(sock_create_kern
);
3097 EXPORT_SYMBOL(sock_create_lite
);
3098 EXPORT_SYMBOL(sock_map_fd
);
3099 EXPORT_SYMBOL(sock_recvmsg
);
3100 EXPORT_SYMBOL(sock_register
);
3101 EXPORT_SYMBOL(sock_release
);
3102 EXPORT_SYMBOL(sock_sendmsg
);
3103 EXPORT_SYMBOL(sock_unregister
);
3104 EXPORT_SYMBOL(sock_wake_async
);
3105 EXPORT_SYMBOL(sockfd_lookup
);
3106 EXPORT_SYMBOL(kernel_sendmsg
);
3107 EXPORT_SYMBOL(kernel_recvmsg
);
3108 EXPORT_SYMBOL(kernel_bind
);
3109 EXPORT_SYMBOL(kernel_listen
);
3110 EXPORT_SYMBOL(kernel_accept
);
3111 EXPORT_SYMBOL(kernel_connect
);
3112 EXPORT_SYMBOL(kernel_getsockname
);
3113 EXPORT_SYMBOL(kernel_getpeername
);
3114 EXPORT_SYMBOL(kernel_getsockopt
);
3115 EXPORT_SYMBOL(kernel_setsockopt
);
3116 EXPORT_SYMBOL(kernel_sendpage
);
3117 EXPORT_SYMBOL(kernel_sock_ioctl
);
3118 EXPORT_SYMBOL(kernel_sock_shutdown
);