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.
174 * move_addr_to_kernel - copy a socket address into kernel space
175 * @uaddr: Address in user space
176 * @kaddr: Address in kernel space
177 * @ulen: Length in user space
179 * The address is copied into kernel space. If the provided address is
180 * too long an error code of -EINVAL is returned. If the copy gives
181 * invalid addresses -EFAULT is returned. On a success 0 is returned.
184 int move_addr_to_kernel(void __user
*uaddr
, int ulen
, struct sockaddr
*kaddr
)
186 if (ulen
< 0 || ulen
> sizeof(struct sockaddr_storage
))
190 if (copy_from_user(kaddr
, uaddr
, ulen
))
192 return audit_sockaddr(ulen
, kaddr
);
196 * move_addr_to_user - copy an address to user space
197 * @kaddr: kernel space address
198 * @klen: length of address in kernel
199 * @uaddr: user space address
200 * @ulen: pointer to user length field
202 * The value pointed to by ulen on entry is the buffer length available.
203 * This is overwritten with the buffer space used. -EINVAL is returned
204 * if an overlong buffer is specified or a negative buffer size. -EFAULT
205 * is returned if either the buffer or the length field are not
207 * After copying the data up to the limit the user specifies, the true
208 * length of the data is written over the length limit the user
209 * specified. Zero is returned for a success.
212 int move_addr_to_user(struct sockaddr
*kaddr
, int klen
, void __user
*uaddr
,
218 err
= get_user(len
, ulen
);
223 if (len
< 0 || len
> sizeof(struct sockaddr_storage
))
226 if (audit_sockaddr(klen
, kaddr
))
228 if (copy_to_user(uaddr
, kaddr
, len
))
232 * "fromlen shall refer to the value before truncation.."
235 return __put_user(klen
, ulen
);
238 static struct kmem_cache
*sock_inode_cachep __read_mostly
;
240 static struct inode
*sock_alloc_inode(struct super_block
*sb
)
242 struct socket_alloc
*ei
;
244 ei
= kmem_cache_alloc(sock_inode_cachep
, GFP_KERNEL
);
247 ei
->socket
.wq
= kmalloc(sizeof(struct socket_wq
), GFP_KERNEL
);
248 if (!ei
->socket
.wq
) {
249 kmem_cache_free(sock_inode_cachep
, ei
);
252 init_waitqueue_head(&ei
->socket
.wq
->wait
);
253 ei
->socket
.wq
->fasync_list
= NULL
;
255 ei
->socket
.state
= SS_UNCONNECTED
;
256 ei
->socket
.flags
= 0;
257 ei
->socket
.ops
= NULL
;
258 ei
->socket
.sk
= NULL
;
259 ei
->socket
.file
= NULL
;
261 return &ei
->vfs_inode
;
265 static void wq_free_rcu(struct rcu_head
*head
)
267 struct socket_wq
*wq
= container_of(head
, struct socket_wq
, rcu
);
272 static void sock_destroy_inode(struct inode
*inode
)
274 struct socket_alloc
*ei
;
276 ei
= container_of(inode
, struct socket_alloc
, vfs_inode
);
277 call_rcu(&ei
->socket
.wq
->rcu
, wq_free_rcu
);
278 kmem_cache_free(sock_inode_cachep
, ei
);
281 static void init_once(void *foo
)
283 struct socket_alloc
*ei
= (struct socket_alloc
*)foo
;
285 inode_init_once(&ei
->vfs_inode
);
288 static int init_inodecache(void)
290 sock_inode_cachep
= kmem_cache_create("sock_inode_cache",
291 sizeof(struct socket_alloc
),
293 (SLAB_HWCACHE_ALIGN
|
294 SLAB_RECLAIM_ACCOUNT
|
297 if (sock_inode_cachep
== NULL
)
302 static const struct super_operations sockfs_ops
= {
303 .alloc_inode
= sock_alloc_inode
,
304 .destroy_inode
= sock_destroy_inode
,
305 .statfs
= simple_statfs
,
308 static int sockfs_get_sb(struct file_system_type
*fs_type
,
309 int flags
, const char *dev_name
, void *data
,
310 struct vfsmount
*mnt
)
312 return get_sb_pseudo(fs_type
, "socket:", &sockfs_ops
, SOCKFS_MAGIC
,
316 static struct vfsmount
*sock_mnt __read_mostly
;
318 static struct file_system_type sock_fs_type
= {
320 .get_sb
= sockfs_get_sb
,
321 .kill_sb
= kill_anon_super
,
325 * sockfs_dname() is called from d_path().
327 static char *sockfs_dname(struct dentry
*dentry
, char *buffer
, int buflen
)
329 return dynamic_dname(dentry
, buffer
, buflen
, "socket:[%lu]",
330 dentry
->d_inode
->i_ino
);
333 static const struct dentry_operations sockfs_dentry_operations
= {
334 .d_dname
= sockfs_dname
,
338 * Obtains the first available file descriptor and sets it up for use.
340 * These functions create file structures and maps them to fd space
341 * of the current process. On success it returns file descriptor
342 * and file struct implicitly stored in sock->file.
343 * Note that another thread may close file descriptor before we return
344 * from this function. We use the fact that now we do not refer
345 * to socket after mapping. If one day we will need it, this
346 * function will increment ref. count on file by 1.
348 * In any case returned fd MAY BE not valid!
349 * This race condition is unavoidable
350 * with shared fd spaces, we cannot solve it inside kernel,
351 * but we take care of internal coherence yet.
354 static int sock_alloc_file(struct socket
*sock
, struct file
**f
, int flags
)
356 struct qstr name
= { .name
= "" };
361 fd
= get_unused_fd_flags(flags
);
362 if (unlikely(fd
< 0))
365 path
.dentry
= d_alloc(sock_mnt
->mnt_sb
->s_root
, &name
);
366 if (unlikely(!path
.dentry
)) {
370 path
.mnt
= mntget(sock_mnt
);
372 path
.dentry
->d_op
= &sockfs_dentry_operations
;
373 d_instantiate(path
.dentry
, SOCK_INODE(sock
));
374 SOCK_INODE(sock
)->i_fop
= &socket_file_ops
;
376 file
= alloc_file(&path
, FMODE_READ
| FMODE_WRITE
,
378 if (unlikely(!file
)) {
379 /* drop dentry, keep inode */
380 atomic_inc(&path
.dentry
->d_inode
->i_count
);
387 file
->f_flags
= O_RDWR
| (flags
& O_NONBLOCK
);
389 file
->private_data
= sock
;
395 int sock_map_fd(struct socket
*sock
, int flags
)
397 struct file
*newfile
;
398 int fd
= sock_alloc_file(sock
, &newfile
, flags
);
401 fd_install(fd
, newfile
);
405 EXPORT_SYMBOL(sock_map_fd
);
407 static struct socket
*sock_from_file(struct file
*file
, int *err
)
409 if (file
->f_op
== &socket_file_ops
)
410 return file
->private_data
; /* set in sock_map_fd */
417 * sockfd_lookup - Go from a file number to its socket slot
419 * @err: pointer to an error code return
421 * The file handle passed in is locked and the socket it is bound
422 * too is returned. If an error occurs the err pointer is overwritten
423 * with a negative errno code and NULL is returned. The function checks
424 * for both invalid handles and passing a handle which is not a socket.
426 * On a success the socket object pointer is returned.
429 struct socket
*sockfd_lookup(int fd
, int *err
)
440 sock
= sock_from_file(file
, err
);
445 EXPORT_SYMBOL(sockfd_lookup
);
447 static struct socket
*sockfd_lookup_light(int fd
, int *err
, int *fput_needed
)
453 file
= fget_light(fd
, fput_needed
);
455 sock
= sock_from_file(file
, err
);
458 fput_light(file
, *fput_needed
);
464 * sock_alloc - allocate a socket
466 * Allocate a new inode and socket object. The two are bound together
467 * and initialised. The socket is then returned. If we are out of inodes
471 static struct socket
*sock_alloc(void)
476 inode
= new_inode(sock_mnt
->mnt_sb
);
480 sock
= SOCKET_I(inode
);
482 kmemcheck_annotate_bitfield(sock
, type
);
483 inode
->i_mode
= S_IFSOCK
| S_IRWXUGO
;
484 inode
->i_uid
= current_fsuid();
485 inode
->i_gid
= current_fsgid();
487 percpu_add(sockets_in_use
, 1);
492 * In theory you can't get an open on this inode, but /proc provides
493 * a back door. Remember to keep it shut otherwise you'll let the
494 * creepy crawlies in.
497 static int sock_no_open(struct inode
*irrelevant
, struct file
*dontcare
)
502 const struct file_operations bad_sock_fops
= {
503 .owner
= THIS_MODULE
,
504 .open
= sock_no_open
,
508 * sock_release - close a socket
509 * @sock: socket to close
511 * The socket is released from the protocol stack if it has a release
512 * callback, and the inode is then released if the socket is bound to
513 * an inode not a file.
516 void sock_release(struct socket
*sock
)
519 struct module
*owner
= sock
->ops
->owner
;
521 sock
->ops
->release(sock
);
526 if (sock
->wq
->fasync_list
)
527 printk(KERN_ERR
"sock_release: fasync list not empty!\n");
529 percpu_sub(sockets_in_use
, 1);
531 iput(SOCK_INODE(sock
));
536 EXPORT_SYMBOL(sock_release
);
538 int sock_tx_timestamp(struct msghdr
*msg
, struct sock
*sk
,
539 union skb_shared_tx
*shtx
)
542 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_HARDWARE
))
544 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_SOFTWARE
))
548 EXPORT_SYMBOL(sock_tx_timestamp
);
550 static inline int __sock_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
551 struct msghdr
*msg
, size_t size
)
553 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
556 sock_update_classid(sock
->sk
);
563 err
= security_socket_sendmsg(sock
, msg
, size
);
567 return sock
->ops
->sendmsg(iocb
, sock
, msg
, size
);
570 int sock_sendmsg(struct socket
*sock
, struct msghdr
*msg
, size_t size
)
573 struct sock_iocb siocb
;
576 init_sync_kiocb(&iocb
, NULL
);
577 iocb
.private = &siocb
;
578 ret
= __sock_sendmsg(&iocb
, sock
, msg
, size
);
579 if (-EIOCBQUEUED
== ret
)
580 ret
= wait_on_sync_kiocb(&iocb
);
583 EXPORT_SYMBOL(sock_sendmsg
);
585 int kernel_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
586 struct kvec
*vec
, size_t num
, size_t size
)
588 mm_segment_t oldfs
= get_fs();
593 * the following is safe, since for compiler definitions of kvec and
594 * iovec are identical, yielding the same in-core layout and alignment
596 msg
->msg_iov
= (struct iovec
*)vec
;
597 msg
->msg_iovlen
= num
;
598 result
= sock_sendmsg(sock
, msg
, size
);
602 EXPORT_SYMBOL(kernel_sendmsg
);
604 static int ktime2ts(ktime_t kt
, struct timespec
*ts
)
607 *ts
= ktime_to_timespec(kt
);
615 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
617 void __sock_recv_timestamp(struct msghdr
*msg
, struct sock
*sk
,
620 int need_software_tstamp
= sock_flag(sk
, SOCK_RCVTSTAMP
);
621 struct timespec ts
[3];
623 struct skb_shared_hwtstamps
*shhwtstamps
=
626 /* Race occurred between timestamp enabling and packet
627 receiving. Fill in the current time for now. */
628 if (need_software_tstamp
&& skb
->tstamp
.tv64
== 0)
629 __net_timestamp(skb
);
631 if (need_software_tstamp
) {
632 if (!sock_flag(sk
, SOCK_RCVTSTAMPNS
)) {
634 skb_get_timestamp(skb
, &tv
);
635 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMP
,
638 skb_get_timestampns(skb
, &ts
[0]);
639 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMPNS
,
640 sizeof(ts
[0]), &ts
[0]);
645 memset(ts
, 0, sizeof(ts
));
646 if (skb
->tstamp
.tv64
&&
647 sock_flag(sk
, SOCK_TIMESTAMPING_SOFTWARE
)) {
648 skb_get_timestampns(skb
, ts
+ 0);
652 if (sock_flag(sk
, SOCK_TIMESTAMPING_SYS_HARDWARE
) &&
653 ktime2ts(shhwtstamps
->syststamp
, ts
+ 1))
655 if (sock_flag(sk
, SOCK_TIMESTAMPING_RAW_HARDWARE
) &&
656 ktime2ts(shhwtstamps
->hwtstamp
, ts
+ 2))
660 put_cmsg(msg
, SOL_SOCKET
,
661 SCM_TIMESTAMPING
, sizeof(ts
), &ts
);
663 EXPORT_SYMBOL_GPL(__sock_recv_timestamp
);
665 inline void sock_recv_drops(struct msghdr
*msg
, struct sock
*sk
, struct sk_buff
*skb
)
667 if (sock_flag(sk
, SOCK_RXQ_OVFL
) && skb
&& skb
->dropcount
)
668 put_cmsg(msg
, SOL_SOCKET
, SO_RXQ_OVFL
,
669 sizeof(__u32
), &skb
->dropcount
);
672 void __sock_recv_ts_and_drops(struct msghdr
*msg
, struct sock
*sk
,
675 sock_recv_timestamp(msg
, sk
, skb
);
676 sock_recv_drops(msg
, sk
, skb
);
678 EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops
);
680 static inline int __sock_recvmsg_nosec(struct kiocb
*iocb
, struct socket
*sock
,
681 struct msghdr
*msg
, size_t size
, int flags
)
683 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
685 sock_update_classid(sock
->sk
);
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
);
718 EXPORT_SYMBOL(sock_recvmsg
);
720 static int sock_recvmsg_nosec(struct socket
*sock
, struct msghdr
*msg
,
721 size_t size
, int flags
)
724 struct sock_iocb siocb
;
727 init_sync_kiocb(&iocb
, NULL
);
728 iocb
.private = &siocb
;
729 ret
= __sock_recvmsg_nosec(&iocb
, sock
, msg
, size
, flags
);
730 if (-EIOCBQUEUED
== ret
)
731 ret
= wait_on_sync_kiocb(&iocb
);
735 int kernel_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
736 struct kvec
*vec
, size_t num
, size_t size
, int flags
)
738 mm_segment_t oldfs
= get_fs();
743 * the following is safe, since for compiler definitions of kvec and
744 * iovec are identical, yielding the same in-core layout and alignment
746 msg
->msg_iov
= (struct iovec
*)vec
, msg
->msg_iovlen
= num
;
747 result
= sock_recvmsg(sock
, msg
, size
, flags
);
751 EXPORT_SYMBOL(kernel_recvmsg
);
753 static void sock_aio_dtor(struct kiocb
*iocb
)
755 kfree(iocb
->private);
758 static ssize_t
sock_sendpage(struct file
*file
, struct page
*page
,
759 int offset
, size_t size
, loff_t
*ppos
, int more
)
764 sock
= file
->private_data
;
766 flags
= !(file
->f_flags
& O_NONBLOCK
) ? 0 : MSG_DONTWAIT
;
770 return kernel_sendpage(sock
, page
, offset
, size
, flags
);
773 static ssize_t
sock_splice_read(struct file
*file
, loff_t
*ppos
,
774 struct pipe_inode_info
*pipe
, size_t len
,
777 struct socket
*sock
= file
->private_data
;
779 if (unlikely(!sock
->ops
->splice_read
))
782 sock_update_classid(sock
->sk
);
784 return sock
->ops
->splice_read(sock
, ppos
, pipe
, len
, flags
);
787 static struct sock_iocb
*alloc_sock_iocb(struct kiocb
*iocb
,
788 struct sock_iocb
*siocb
)
790 if (!is_sync_kiocb(iocb
)) {
791 siocb
= kmalloc(sizeof(*siocb
), GFP_KERNEL
);
794 iocb
->ki_dtor
= sock_aio_dtor
;
798 iocb
->private = siocb
;
802 static ssize_t
do_sock_read(struct msghdr
*msg
, struct kiocb
*iocb
,
803 struct file
*file
, const struct iovec
*iov
,
804 unsigned long nr_segs
)
806 struct socket
*sock
= file
->private_data
;
810 for (i
= 0; i
< nr_segs
; i
++)
811 size
+= iov
[i
].iov_len
;
813 msg
->msg_name
= NULL
;
814 msg
->msg_namelen
= 0;
815 msg
->msg_control
= NULL
;
816 msg
->msg_controllen
= 0;
817 msg
->msg_iov
= (struct iovec
*)iov
;
818 msg
->msg_iovlen
= nr_segs
;
819 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
821 return __sock_recvmsg(iocb
, sock
, msg
, size
, msg
->msg_flags
);
824 static ssize_t
sock_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
825 unsigned long nr_segs
, loff_t pos
)
827 struct sock_iocb siocb
, *x
;
832 if (iocb
->ki_left
== 0) /* Match SYS5 behaviour */
836 x
= alloc_sock_iocb(iocb
, &siocb
);
839 return do_sock_read(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
842 static ssize_t
do_sock_write(struct msghdr
*msg
, struct kiocb
*iocb
,
843 struct file
*file
, const struct iovec
*iov
,
844 unsigned long nr_segs
)
846 struct socket
*sock
= file
->private_data
;
850 for (i
= 0; i
< nr_segs
; i
++)
851 size
+= iov
[i
].iov_len
;
853 msg
->msg_name
= NULL
;
854 msg
->msg_namelen
= 0;
855 msg
->msg_control
= NULL
;
856 msg
->msg_controllen
= 0;
857 msg
->msg_iov
= (struct iovec
*)iov
;
858 msg
->msg_iovlen
= nr_segs
;
859 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
860 if (sock
->type
== SOCK_SEQPACKET
)
861 msg
->msg_flags
|= MSG_EOR
;
863 return __sock_sendmsg(iocb
, sock
, msg
, size
);
866 static ssize_t
sock_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
867 unsigned long nr_segs
, loff_t pos
)
869 struct sock_iocb siocb
, *x
;
874 x
= alloc_sock_iocb(iocb
, &siocb
);
878 return do_sock_write(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
882 * Atomic setting of ioctl hooks to avoid race
883 * with module unload.
886 static DEFINE_MUTEX(br_ioctl_mutex
);
887 static int (*br_ioctl_hook
) (struct net
*, unsigned int cmd
, void __user
*arg
);
889 void brioctl_set(int (*hook
) (struct net
*, unsigned int, void __user
*))
891 mutex_lock(&br_ioctl_mutex
);
892 br_ioctl_hook
= hook
;
893 mutex_unlock(&br_ioctl_mutex
);
895 EXPORT_SYMBOL(brioctl_set
);
897 static DEFINE_MUTEX(vlan_ioctl_mutex
);
898 static int (*vlan_ioctl_hook
) (struct net
*, void __user
*arg
);
900 void vlan_ioctl_set(int (*hook
) (struct net
*, void __user
*))
902 mutex_lock(&vlan_ioctl_mutex
);
903 vlan_ioctl_hook
= hook
;
904 mutex_unlock(&vlan_ioctl_mutex
);
906 EXPORT_SYMBOL(vlan_ioctl_set
);
908 static DEFINE_MUTEX(dlci_ioctl_mutex
);
909 static int (*dlci_ioctl_hook
) (unsigned int, void __user
*);
911 void dlci_ioctl_set(int (*hook
) (unsigned int, void __user
*))
913 mutex_lock(&dlci_ioctl_mutex
);
914 dlci_ioctl_hook
= hook
;
915 mutex_unlock(&dlci_ioctl_mutex
);
917 EXPORT_SYMBOL(dlci_ioctl_set
);
919 static long sock_do_ioctl(struct net
*net
, struct socket
*sock
,
920 unsigned int cmd
, unsigned long arg
)
923 void __user
*argp
= (void __user
*)arg
;
925 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
928 * If this ioctl is unknown try to hand it down
931 if (err
== -ENOIOCTLCMD
)
932 err
= dev_ioctl(net
, cmd
, argp
);
938 * With an ioctl, arg may well be a user mode pointer, but we don't know
939 * what to do with it - that's up to the protocol still.
942 static long sock_ioctl(struct file
*file
, unsigned cmd
, unsigned long arg
)
946 void __user
*argp
= (void __user
*)arg
;
950 sock
= file
->private_data
;
953 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15)) {
954 err
= dev_ioctl(net
, cmd
, argp
);
956 #ifdef CONFIG_WEXT_CORE
957 if (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
) {
958 err
= dev_ioctl(net
, cmd
, argp
);
965 if (get_user(pid
, (int __user
*)argp
))
967 err
= f_setown(sock
->file
, pid
, 1);
971 err
= put_user(f_getown(sock
->file
),
980 request_module("bridge");
982 mutex_lock(&br_ioctl_mutex
);
984 err
= br_ioctl_hook(net
, cmd
, argp
);
985 mutex_unlock(&br_ioctl_mutex
);
990 if (!vlan_ioctl_hook
)
991 request_module("8021q");
993 mutex_lock(&vlan_ioctl_mutex
);
995 err
= vlan_ioctl_hook(net
, argp
);
996 mutex_unlock(&vlan_ioctl_mutex
);
1001 if (!dlci_ioctl_hook
)
1002 request_module("dlci");
1004 mutex_lock(&dlci_ioctl_mutex
);
1005 if (dlci_ioctl_hook
)
1006 err
= dlci_ioctl_hook(cmd
, argp
);
1007 mutex_unlock(&dlci_ioctl_mutex
);
1010 err
= sock_do_ioctl(net
, sock
, cmd
, arg
);
1016 int sock_create_lite(int family
, int type
, int protocol
, struct socket
**res
)
1019 struct socket
*sock
= NULL
;
1021 err
= security_socket_create(family
, type
, protocol
, 1);
1025 sock
= sock_alloc();
1032 err
= security_socket_post_create(sock
, family
, type
, protocol
, 1);
1044 EXPORT_SYMBOL(sock_create_lite
);
1046 /* No kernel lock held - perfect */
1047 static unsigned int sock_poll(struct file
*file
, poll_table
*wait
)
1049 struct socket
*sock
;
1052 * We can't return errors to poll, so it's either yes or no.
1054 sock
= file
->private_data
;
1055 return sock
->ops
->poll(file
, sock
, wait
);
1058 static int sock_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1060 struct socket
*sock
= file
->private_data
;
1062 return sock
->ops
->mmap(file
, sock
, vma
);
1065 static int sock_close(struct inode
*inode
, struct file
*filp
)
1068 * It was possible the inode is NULL we were
1069 * closing an unfinished socket.
1073 printk(KERN_DEBUG
"sock_close: NULL inode\n");
1076 sock_release(SOCKET_I(inode
));
1081 * Update the socket async list
1083 * Fasync_list locking strategy.
1085 * 1. fasync_list is modified only under process context socket lock
1086 * i.e. under semaphore.
1087 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
1088 * or under socket lock
1091 static int sock_fasync(int fd
, struct file
*filp
, int on
)
1093 struct socket
*sock
= filp
->private_data
;
1094 struct sock
*sk
= sock
->sk
;
1101 fasync_helper(fd
, filp
, on
, &sock
->wq
->fasync_list
);
1103 if (!sock
->wq
->fasync_list
)
1104 sock_reset_flag(sk
, SOCK_FASYNC
);
1106 sock_set_flag(sk
, SOCK_FASYNC
);
1112 /* This function may be called only under socket lock or callback_lock or rcu_lock */
1114 int sock_wake_async(struct socket
*sock
, int how
, int band
)
1116 struct socket_wq
*wq
;
1121 wq
= rcu_dereference(sock
->wq
);
1122 if (!wq
|| !wq
->fasync_list
) {
1127 case SOCK_WAKE_WAITD
:
1128 if (test_bit(SOCK_ASYNC_WAITDATA
, &sock
->flags
))
1131 case SOCK_WAKE_SPACE
:
1132 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE
, &sock
->flags
))
1137 kill_fasync(&wq
->fasync_list
, SIGIO
, band
);
1140 kill_fasync(&wq
->fasync_list
, SIGURG
, band
);
1145 EXPORT_SYMBOL(sock_wake_async
);
1147 int __sock_create(struct net
*net
, int family
, int type
, int protocol
,
1148 struct socket
**res
, int kern
)
1151 struct socket
*sock
;
1152 const struct net_proto_family
*pf
;
1155 * Check protocol is in range
1157 if (family
< 0 || family
>= NPROTO
)
1158 return -EAFNOSUPPORT
;
1159 if (type
< 0 || type
>= SOCK_MAX
)
1164 This uglymoron is moved from INET layer to here to avoid
1165 deadlock in module load.
1167 if (family
== PF_INET
&& type
== SOCK_PACKET
) {
1171 printk(KERN_INFO
"%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1177 err
= security_socket_create(family
, type
, protocol
, kern
);
1182 * Allocate the socket and allow the family to set things up. if
1183 * the protocol is 0, the family is instructed to select an appropriate
1186 sock
= sock_alloc();
1188 if (net_ratelimit())
1189 printk(KERN_WARNING
"socket: no more sockets\n");
1190 return -ENFILE
; /* Not exactly a match, but its the
1191 closest posix thing */
1196 #ifdef CONFIG_MODULES
1197 /* Attempt to load a protocol module if the find failed.
1199 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
1200 * requested real, full-featured networking support upon configuration.
1201 * Otherwise module support will break!
1203 if (net_families
[family
] == NULL
)
1204 request_module("net-pf-%d", family
);
1208 pf
= rcu_dereference(net_families
[family
]);
1209 err
= -EAFNOSUPPORT
;
1214 * We will call the ->create function, that possibly is in a loadable
1215 * module, so we have to bump that loadable module refcnt first.
1217 if (!try_module_get(pf
->owner
))
1220 /* Now protected by module ref count */
1223 err
= pf
->create(net
, sock
, protocol
, kern
);
1225 goto out_module_put
;
1228 * Now to bump the refcnt of the [loadable] module that owns this
1229 * socket at sock_release time we decrement its refcnt.
1231 if (!try_module_get(sock
->ops
->owner
))
1232 goto out_module_busy
;
1235 * Now that we're done with the ->create function, the [loadable]
1236 * module can have its refcnt decremented
1238 module_put(pf
->owner
);
1239 err
= security_socket_post_create(sock
, family
, type
, protocol
, kern
);
1241 goto out_sock_release
;
1247 err
= -EAFNOSUPPORT
;
1250 module_put(pf
->owner
);
1257 goto out_sock_release
;
1259 EXPORT_SYMBOL(__sock_create
);
1261 int sock_create(int family
, int type
, int protocol
, struct socket
**res
)
1263 return __sock_create(current
->nsproxy
->net_ns
, family
, type
, protocol
, res
, 0);
1265 EXPORT_SYMBOL(sock_create
);
1267 int sock_create_kern(int family
, int type
, int protocol
, struct socket
**res
)
1269 return __sock_create(&init_net
, family
, type
, protocol
, res
, 1);
1271 EXPORT_SYMBOL(sock_create_kern
);
1273 SYSCALL_DEFINE3(socket
, int, family
, int, type
, int, protocol
)
1276 struct socket
*sock
;
1279 /* Check the SOCK_* constants for consistency. */
1280 BUILD_BUG_ON(SOCK_CLOEXEC
!= O_CLOEXEC
);
1281 BUILD_BUG_ON((SOCK_MAX
| SOCK_TYPE_MASK
) != SOCK_TYPE_MASK
);
1282 BUILD_BUG_ON(SOCK_CLOEXEC
& SOCK_TYPE_MASK
);
1283 BUILD_BUG_ON(SOCK_NONBLOCK
& SOCK_TYPE_MASK
);
1285 flags
= type
& ~SOCK_TYPE_MASK
;
1286 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1288 type
&= SOCK_TYPE_MASK
;
1290 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1291 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1293 retval
= sock_create(family
, type
, protocol
, &sock
);
1297 retval
= sock_map_fd(sock
, flags
& (O_CLOEXEC
| O_NONBLOCK
));
1302 /* It may be already another descriptor 8) Not kernel problem. */
1311 * Create a pair of connected sockets.
1314 SYSCALL_DEFINE4(socketpair
, int, family
, int, type
, int, protocol
,
1315 int __user
*, usockvec
)
1317 struct socket
*sock1
, *sock2
;
1319 struct file
*newfile1
, *newfile2
;
1322 flags
= type
& ~SOCK_TYPE_MASK
;
1323 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1325 type
&= SOCK_TYPE_MASK
;
1327 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1328 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1331 * Obtain the first socket and check if the underlying protocol
1332 * supports the socketpair call.
1335 err
= sock_create(family
, type
, protocol
, &sock1
);
1339 err
= sock_create(family
, type
, protocol
, &sock2
);
1343 err
= sock1
->ops
->socketpair(sock1
, sock2
);
1345 goto out_release_both
;
1347 fd1
= sock_alloc_file(sock1
, &newfile1
, flags
);
1348 if (unlikely(fd1
< 0)) {
1350 goto out_release_both
;
1353 fd2
= sock_alloc_file(sock2
, &newfile2
, flags
);
1354 if (unlikely(fd2
< 0)) {
1358 sock_release(sock2
);
1362 audit_fd_pair(fd1
, fd2
);
1363 fd_install(fd1
, newfile1
);
1364 fd_install(fd2
, newfile2
);
1365 /* fd1 and fd2 may be already another descriptors.
1366 * Not kernel problem.
1369 err
= put_user(fd1
, &usockvec
[0]);
1371 err
= put_user(fd2
, &usockvec
[1]);
1380 sock_release(sock2
);
1382 sock_release(sock1
);
1388 * Bind a name to a socket. Nothing much to do here since it's
1389 * the protocol's responsibility to handle the local address.
1391 * We move the socket address to kernel space before we call
1392 * the protocol layer (having also checked the address is ok).
1395 SYSCALL_DEFINE3(bind
, int, fd
, struct sockaddr __user
*, umyaddr
, int, addrlen
)
1397 struct socket
*sock
;
1398 struct sockaddr_storage address
;
1399 int err
, fput_needed
;
1401 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1403 err
= move_addr_to_kernel(umyaddr
, addrlen
, (struct sockaddr
*)&address
);
1405 err
= security_socket_bind(sock
,
1406 (struct sockaddr
*)&address
,
1409 err
= sock
->ops
->bind(sock
,
1413 fput_light(sock
->file
, fput_needed
);
1419 * Perform a listen. Basically, we allow the protocol to do anything
1420 * necessary for a listen, and if that works, we mark the socket as
1421 * ready for listening.
1424 SYSCALL_DEFINE2(listen
, int, fd
, int, backlog
)
1426 struct socket
*sock
;
1427 int err
, fput_needed
;
1430 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1432 somaxconn
= sock_net(sock
->sk
)->core
.sysctl_somaxconn
;
1433 if ((unsigned)backlog
> somaxconn
)
1434 backlog
= somaxconn
;
1436 err
= security_socket_listen(sock
, backlog
);
1438 err
= sock
->ops
->listen(sock
, backlog
);
1440 fput_light(sock
->file
, fput_needed
);
1446 * For accept, we attempt to create a new socket, set up the link
1447 * with the client, wake up the client, then return the new
1448 * connected fd. We collect the address of the connector in kernel
1449 * space and move it to user at the very end. This is unclean because
1450 * we open the socket then return an error.
1452 * 1003.1g adds the ability to recvmsg() to query connection pending
1453 * status to recvmsg. We need to add that support in a way thats
1454 * clean when we restucture accept also.
1457 SYSCALL_DEFINE4(accept4
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1458 int __user
*, upeer_addrlen
, int, flags
)
1460 struct socket
*sock
, *newsock
;
1461 struct file
*newfile
;
1462 int err
, len
, newfd
, fput_needed
;
1463 struct sockaddr_storage address
;
1465 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1468 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1469 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1471 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1476 newsock
= sock_alloc();
1480 newsock
->type
= sock
->type
;
1481 newsock
->ops
= sock
->ops
;
1484 * We don't need try_module_get here, as the listening socket (sock)
1485 * has the protocol module (sock->ops->owner) held.
1487 __module_get(newsock
->ops
->owner
);
1489 newfd
= sock_alloc_file(newsock
, &newfile
, flags
);
1490 if (unlikely(newfd
< 0)) {
1492 sock_release(newsock
);
1496 err
= security_socket_accept(sock
, newsock
);
1500 err
= sock
->ops
->accept(sock
, newsock
, sock
->file
->f_flags
);
1504 if (upeer_sockaddr
) {
1505 if (newsock
->ops
->getname(newsock
, (struct sockaddr
*)&address
,
1507 err
= -ECONNABORTED
;
1510 err
= move_addr_to_user((struct sockaddr
*)&address
,
1511 len
, upeer_sockaddr
, upeer_addrlen
);
1516 /* File flags are not inherited via accept() unlike another OSes. */
1518 fd_install(newfd
, newfile
);
1522 fput_light(sock
->file
, fput_needed
);
1527 put_unused_fd(newfd
);
1531 SYSCALL_DEFINE3(accept
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1532 int __user
*, upeer_addrlen
)
1534 return sys_accept4(fd
, upeer_sockaddr
, upeer_addrlen
, 0);
1538 * Attempt to connect to a socket with the server address. The address
1539 * is in user space so we verify it is OK and move it to kernel space.
1541 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1544 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1545 * other SEQPACKET protocols that take time to connect() as it doesn't
1546 * include the -EINPROGRESS status for such sockets.
1549 SYSCALL_DEFINE3(connect
, int, fd
, struct sockaddr __user
*, uservaddr
,
1552 struct socket
*sock
;
1553 struct sockaddr_storage address
;
1554 int err
, fput_needed
;
1556 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1559 err
= move_addr_to_kernel(uservaddr
, addrlen
, (struct sockaddr
*)&address
);
1564 security_socket_connect(sock
, (struct sockaddr
*)&address
, addrlen
);
1568 err
= sock
->ops
->connect(sock
, (struct sockaddr
*)&address
, addrlen
,
1569 sock
->file
->f_flags
);
1571 fput_light(sock
->file
, fput_needed
);
1577 * Get the local address ('name') of a socket object. Move the obtained
1578 * name to user space.
1581 SYSCALL_DEFINE3(getsockname
, int, fd
, struct sockaddr __user
*, usockaddr
,
1582 int __user
*, usockaddr_len
)
1584 struct socket
*sock
;
1585 struct sockaddr_storage address
;
1586 int len
, err
, fput_needed
;
1588 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1592 err
= security_socket_getsockname(sock
);
1596 err
= sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
, 0);
1599 err
= move_addr_to_user((struct sockaddr
*)&address
, len
, usockaddr
, usockaddr_len
);
1602 fput_light(sock
->file
, fput_needed
);
1608 * Get the remote address ('name') of a socket object. Move the obtained
1609 * name to user space.
1612 SYSCALL_DEFINE3(getpeername
, int, fd
, struct sockaddr __user
*, usockaddr
,
1613 int __user
*, usockaddr_len
)
1615 struct socket
*sock
;
1616 struct sockaddr_storage address
;
1617 int len
, err
, fput_needed
;
1619 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1621 err
= security_socket_getpeername(sock
);
1623 fput_light(sock
->file
, fput_needed
);
1628 sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
,
1631 err
= move_addr_to_user((struct sockaddr
*)&address
, len
, usockaddr
,
1633 fput_light(sock
->file
, fput_needed
);
1639 * Send a datagram to a given address. We move the address into kernel
1640 * space and check the user space data area is readable before invoking
1644 SYSCALL_DEFINE6(sendto
, int, fd
, void __user
*, buff
, size_t, len
,
1645 unsigned, flags
, struct sockaddr __user
*, addr
,
1648 struct socket
*sock
;
1649 struct sockaddr_storage address
;
1655 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1659 iov
.iov_base
= buff
;
1661 msg
.msg_name
= NULL
;
1664 msg
.msg_control
= NULL
;
1665 msg
.msg_controllen
= 0;
1666 msg
.msg_namelen
= 0;
1668 err
= move_addr_to_kernel(addr
, addr_len
, (struct sockaddr
*)&address
);
1671 msg
.msg_name
= (struct sockaddr
*)&address
;
1672 msg
.msg_namelen
= addr_len
;
1674 if (sock
->file
->f_flags
& O_NONBLOCK
)
1675 flags
|= MSG_DONTWAIT
;
1676 msg
.msg_flags
= flags
;
1677 err
= sock_sendmsg(sock
, &msg
, len
);
1680 fput_light(sock
->file
, fput_needed
);
1686 * Send a datagram down a socket.
1689 SYSCALL_DEFINE4(send
, int, fd
, void __user
*, buff
, size_t, len
,
1692 return sys_sendto(fd
, buff
, len
, flags
, NULL
, 0);
1696 * Receive a frame from the socket and optionally record the address of the
1697 * sender. We verify the buffers are writable and if needed move the
1698 * sender address from kernel to user space.
1701 SYSCALL_DEFINE6(recvfrom
, int, fd
, void __user
*, ubuf
, size_t, size
,
1702 unsigned, flags
, struct sockaddr __user
*, addr
,
1703 int __user
*, addr_len
)
1705 struct socket
*sock
;
1708 struct sockaddr_storage address
;
1712 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1716 msg
.msg_control
= NULL
;
1717 msg
.msg_controllen
= 0;
1721 iov
.iov_base
= ubuf
;
1722 msg
.msg_name
= (struct sockaddr
*)&address
;
1723 msg
.msg_namelen
= sizeof(address
);
1724 if (sock
->file
->f_flags
& O_NONBLOCK
)
1725 flags
|= MSG_DONTWAIT
;
1726 err
= sock_recvmsg(sock
, &msg
, size
, flags
);
1728 if (err
>= 0 && addr
!= NULL
) {
1729 err2
= move_addr_to_user((struct sockaddr
*)&address
,
1730 msg
.msg_namelen
, addr
, addr_len
);
1735 fput_light(sock
->file
, fput_needed
);
1741 * Receive a datagram from a socket.
1744 asmlinkage
long sys_recv(int fd
, void __user
*ubuf
, size_t size
,
1747 return sys_recvfrom(fd
, ubuf
, size
, flags
, NULL
, NULL
);
1751 * Set a socket option. Because we don't know the option lengths we have
1752 * to pass the user mode parameter for the protocols to sort out.
1755 SYSCALL_DEFINE5(setsockopt
, int, fd
, int, level
, int, optname
,
1756 char __user
*, optval
, int, optlen
)
1758 int err
, fput_needed
;
1759 struct socket
*sock
;
1764 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1766 err
= security_socket_setsockopt(sock
, level
, optname
);
1770 if (level
== SOL_SOCKET
)
1772 sock_setsockopt(sock
, level
, optname
, optval
,
1776 sock
->ops
->setsockopt(sock
, level
, optname
, optval
,
1779 fput_light(sock
->file
, fput_needed
);
1785 * Get a socket option. Because we don't know the option lengths we have
1786 * to pass a user mode parameter for the protocols to sort out.
1789 SYSCALL_DEFINE5(getsockopt
, int, fd
, int, level
, int, optname
,
1790 char __user
*, optval
, int __user
*, optlen
)
1792 int err
, fput_needed
;
1793 struct socket
*sock
;
1795 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1797 err
= security_socket_getsockopt(sock
, level
, optname
);
1801 if (level
== SOL_SOCKET
)
1803 sock_getsockopt(sock
, level
, optname
, optval
,
1807 sock
->ops
->getsockopt(sock
, level
, optname
, optval
,
1810 fput_light(sock
->file
, fput_needed
);
1816 * Shutdown a socket.
1819 SYSCALL_DEFINE2(shutdown
, int, fd
, int, how
)
1821 int err
, fput_needed
;
1822 struct socket
*sock
;
1824 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1826 err
= security_socket_shutdown(sock
, how
);
1828 err
= sock
->ops
->shutdown(sock
, how
);
1829 fput_light(sock
->file
, fput_needed
);
1834 /* A couple of helpful macros for getting the address of the 32/64 bit
1835 * fields which are the same type (int / unsigned) on our platforms.
1837 #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1838 #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1839 #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1842 * BSD sendmsg interface
1845 SYSCALL_DEFINE3(sendmsg
, int, fd
, struct msghdr __user
*, msg
, unsigned, flags
)
1847 struct compat_msghdr __user
*msg_compat
=
1848 (struct compat_msghdr __user
*)msg
;
1849 struct socket
*sock
;
1850 struct sockaddr_storage address
;
1851 struct iovec iovstack
[UIO_FASTIOV
], *iov
= iovstack
;
1852 unsigned char ctl
[sizeof(struct cmsghdr
) + 20]
1853 __attribute__ ((aligned(sizeof(__kernel_size_t
))));
1854 /* 20 is size of ipv6_pktinfo */
1855 unsigned char *ctl_buf
= ctl
;
1856 struct msghdr msg_sys
;
1857 int err
, ctl_len
, iov_size
, total_len
;
1861 if (MSG_CMSG_COMPAT
& flags
) {
1862 if (get_compat_msghdr(&msg_sys
, msg_compat
))
1864 } else if (copy_from_user(&msg_sys
, msg
, sizeof(struct msghdr
)))
1867 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1871 /* do not move before msg_sys is valid */
1873 if (msg_sys
.msg_iovlen
> UIO_MAXIOV
)
1876 /* Check whether to allocate the iovec area */
1878 iov_size
= msg_sys
.msg_iovlen
* sizeof(struct iovec
);
1879 if (msg_sys
.msg_iovlen
> UIO_FASTIOV
) {
1880 iov
= sock_kmalloc(sock
->sk
, iov_size
, GFP_KERNEL
);
1885 /* This will also move the address data into kernel space */
1886 if (MSG_CMSG_COMPAT
& flags
) {
1887 err
= verify_compat_iovec(&msg_sys
, iov
,
1888 (struct sockaddr
*)&address
,
1891 err
= verify_iovec(&msg_sys
, iov
,
1892 (struct sockaddr
*)&address
,
1900 if (msg_sys
.msg_controllen
> INT_MAX
)
1902 ctl_len
= msg_sys
.msg_controllen
;
1903 if ((MSG_CMSG_COMPAT
& flags
) && ctl_len
) {
1905 cmsghdr_from_user_compat_to_kern(&msg_sys
, sock
->sk
, ctl
,
1909 ctl_buf
= msg_sys
.msg_control
;
1910 ctl_len
= msg_sys
.msg_controllen
;
1911 } else if (ctl_len
) {
1912 if (ctl_len
> sizeof(ctl
)) {
1913 ctl_buf
= sock_kmalloc(sock
->sk
, ctl_len
, GFP_KERNEL
);
1914 if (ctl_buf
== NULL
)
1919 * Careful! Before this, msg_sys.msg_control contains a user pointer.
1920 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
1921 * checking falls down on this.
1923 if (copy_from_user(ctl_buf
, (void __user
*)msg_sys
.msg_control
,
1926 msg_sys
.msg_control
= ctl_buf
;
1928 msg_sys
.msg_flags
= flags
;
1930 if (sock
->file
->f_flags
& O_NONBLOCK
)
1931 msg_sys
.msg_flags
|= MSG_DONTWAIT
;
1932 err
= sock_sendmsg(sock
, &msg_sys
, total_len
);
1936 sock_kfree_s(sock
->sk
, ctl_buf
, ctl_len
);
1938 if (iov
!= iovstack
)
1939 sock_kfree_s(sock
->sk
, iov
, iov_size
);
1941 fput_light(sock
->file
, fput_needed
);
1946 static int __sys_recvmsg(struct socket
*sock
, struct msghdr __user
*msg
,
1947 struct msghdr
*msg_sys
, unsigned flags
, int nosec
)
1949 struct compat_msghdr __user
*msg_compat
=
1950 (struct compat_msghdr __user
*)msg
;
1951 struct iovec iovstack
[UIO_FASTIOV
];
1952 struct iovec
*iov
= iovstack
;
1953 unsigned long cmsg_ptr
;
1954 int err
, iov_size
, total_len
, len
;
1956 /* kernel mode address */
1957 struct sockaddr_storage addr
;
1959 /* user mode address pointers */
1960 struct sockaddr __user
*uaddr
;
1961 int __user
*uaddr_len
;
1963 if (MSG_CMSG_COMPAT
& flags
) {
1964 if (get_compat_msghdr(msg_sys
, msg_compat
))
1966 } else if (copy_from_user(msg_sys
, msg
, sizeof(struct msghdr
)))
1970 if (msg_sys
->msg_iovlen
> UIO_MAXIOV
)
1973 /* Check whether to allocate the iovec area */
1975 iov_size
= msg_sys
->msg_iovlen
* sizeof(struct iovec
);
1976 if (msg_sys
->msg_iovlen
> UIO_FASTIOV
) {
1977 iov
= sock_kmalloc(sock
->sk
, iov_size
, GFP_KERNEL
);
1983 * Save the user-mode address (verify_iovec will change the
1984 * kernel msghdr to use the kernel address space)
1987 uaddr
= (__force
void __user
*)msg_sys
->msg_name
;
1988 uaddr_len
= COMPAT_NAMELEN(msg
);
1989 if (MSG_CMSG_COMPAT
& flags
) {
1990 err
= verify_compat_iovec(msg_sys
, iov
,
1991 (struct sockaddr
*)&addr
,
1994 err
= verify_iovec(msg_sys
, iov
,
1995 (struct sockaddr
*)&addr
,
2001 cmsg_ptr
= (unsigned long)msg_sys
->msg_control
;
2002 msg_sys
->msg_flags
= flags
& (MSG_CMSG_CLOEXEC
|MSG_CMSG_COMPAT
);
2004 if (sock
->file
->f_flags
& O_NONBLOCK
)
2005 flags
|= MSG_DONTWAIT
;
2006 err
= (nosec
? sock_recvmsg_nosec
: sock_recvmsg
)(sock
, msg_sys
,
2012 if (uaddr
!= NULL
) {
2013 err
= move_addr_to_user((struct sockaddr
*)&addr
,
2014 msg_sys
->msg_namelen
, uaddr
,
2019 err
= __put_user((msg_sys
->msg_flags
& ~MSG_CMSG_COMPAT
),
2023 if (MSG_CMSG_COMPAT
& flags
)
2024 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2025 &msg_compat
->msg_controllen
);
2027 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2028 &msg
->msg_controllen
);
2034 if (iov
!= iovstack
)
2035 sock_kfree_s(sock
->sk
, iov
, iov_size
);
2041 * BSD recvmsg interface
2044 SYSCALL_DEFINE3(recvmsg
, int, fd
, struct msghdr __user
*, msg
,
2045 unsigned int, flags
)
2047 int fput_needed
, err
;
2048 struct msghdr msg_sys
;
2049 struct socket
*sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2054 err
= __sys_recvmsg(sock
, msg
, &msg_sys
, flags
, 0);
2056 fput_light(sock
->file
, fput_needed
);
2062 * Linux recvmmsg interface
2065 int __sys_recvmmsg(int fd
, struct mmsghdr __user
*mmsg
, unsigned int vlen
,
2066 unsigned int flags
, struct timespec
*timeout
)
2068 int fput_needed
, err
, datagrams
;
2069 struct socket
*sock
;
2070 struct mmsghdr __user
*entry
;
2071 struct compat_mmsghdr __user
*compat_entry
;
2072 struct msghdr msg_sys
;
2073 struct timespec end_time
;
2076 poll_select_set_timeout(&end_time
, timeout
->tv_sec
,
2082 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2086 err
= sock_error(sock
->sk
);
2091 compat_entry
= (struct compat_mmsghdr __user
*)mmsg
;
2093 while (datagrams
< vlen
) {
2095 * No need to ask LSM for more than the first datagram.
2097 if (MSG_CMSG_COMPAT
& flags
) {
2098 err
= __sys_recvmsg(sock
, (struct msghdr __user
*)compat_entry
,
2099 &msg_sys
, flags
, datagrams
);
2102 err
= __put_user(err
, &compat_entry
->msg_len
);
2105 err
= __sys_recvmsg(sock
, (struct msghdr __user
*)entry
,
2106 &msg_sys
, flags
, datagrams
);
2109 err
= put_user(err
, &entry
->msg_len
);
2117 /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
2118 if (flags
& MSG_WAITFORONE
)
2119 flags
|= MSG_DONTWAIT
;
2122 ktime_get_ts(timeout
);
2123 *timeout
= timespec_sub(end_time
, *timeout
);
2124 if (timeout
->tv_sec
< 0) {
2125 timeout
->tv_sec
= timeout
->tv_nsec
= 0;
2129 /* Timeout, return less than vlen datagrams */
2130 if (timeout
->tv_nsec
== 0 && timeout
->tv_sec
== 0)
2134 /* Out of band data, return right away */
2135 if (msg_sys
.msg_flags
& MSG_OOB
)
2140 fput_light(sock
->file
, fput_needed
);
2145 if (datagrams
!= 0) {
2147 * We may return less entries than requested (vlen) if the
2148 * sock is non block and there aren't enough datagrams...
2150 if (err
!= -EAGAIN
) {
2152 * ... or if recvmsg returns an error after we
2153 * received some datagrams, where we record the
2154 * error to return on the next call or if the
2155 * app asks about it using getsockopt(SO_ERROR).
2157 sock
->sk
->sk_err
= -err
;
2166 SYSCALL_DEFINE5(recvmmsg
, int, fd
, struct mmsghdr __user
*, mmsg
,
2167 unsigned int, vlen
, unsigned int, flags
,
2168 struct timespec __user
*, timeout
)
2171 struct timespec timeout_sys
;
2174 return __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, NULL
);
2176 if (copy_from_user(&timeout_sys
, timeout
, sizeof(timeout_sys
)))
2179 datagrams
= __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, &timeout_sys
);
2181 if (datagrams
> 0 &&
2182 copy_to_user(timeout
, &timeout_sys
, sizeof(timeout_sys
)))
2183 datagrams
= -EFAULT
;
2188 #ifdef __ARCH_WANT_SYS_SOCKETCALL
2189 /* Argument list sizes for sys_socketcall */
2190 #define AL(x) ((x) * sizeof(unsigned long))
2191 static const unsigned char nargs
[20] = {
2192 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
2193 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
2194 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
2201 * System call vectors.
2203 * Argument checking cleaned up. Saved 20% in size.
2204 * This function doesn't need to set the kernel lock because
2205 * it is set by the callees.
2208 SYSCALL_DEFINE2(socketcall
, int, call
, unsigned long __user
*, args
)
2211 unsigned long a0
, a1
;
2215 if (call
< 1 || call
> SYS_RECVMMSG
)
2219 if (len
> sizeof(a
))
2222 /* copy_from_user should be SMP safe. */
2223 if (copy_from_user(a
, args
, len
))
2226 audit_socketcall(nargs
[call
] / sizeof(unsigned long), a
);
2233 err
= sys_socket(a0
, a1
, a
[2]);
2236 err
= sys_bind(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2239 err
= sys_connect(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2242 err
= sys_listen(a0
, a1
);
2245 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2246 (int __user
*)a
[2], 0);
2248 case SYS_GETSOCKNAME
:
2250 sys_getsockname(a0
, (struct sockaddr __user
*)a1
,
2251 (int __user
*)a
[2]);
2253 case SYS_GETPEERNAME
:
2255 sys_getpeername(a0
, (struct sockaddr __user
*)a1
,
2256 (int __user
*)a
[2]);
2258 case SYS_SOCKETPAIR
:
2259 err
= sys_socketpair(a0
, a1
, a
[2], (int __user
*)a
[3]);
2262 err
= sys_send(a0
, (void __user
*)a1
, a
[2], a
[3]);
2265 err
= sys_sendto(a0
, (void __user
*)a1
, a
[2], a
[3],
2266 (struct sockaddr __user
*)a
[4], a
[5]);
2269 err
= sys_recv(a0
, (void __user
*)a1
, a
[2], a
[3]);
2272 err
= sys_recvfrom(a0
, (void __user
*)a1
, a
[2], a
[3],
2273 (struct sockaddr __user
*)a
[4],
2274 (int __user
*)a
[5]);
2277 err
= sys_shutdown(a0
, a1
);
2279 case SYS_SETSOCKOPT
:
2280 err
= sys_setsockopt(a0
, a1
, a
[2], (char __user
*)a
[3], a
[4]);
2282 case SYS_GETSOCKOPT
:
2284 sys_getsockopt(a0
, a1
, a
[2], (char __user
*)a
[3],
2285 (int __user
*)a
[4]);
2288 err
= sys_sendmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2291 err
= sys_recvmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2294 err
= sys_recvmmsg(a0
, (struct mmsghdr __user
*)a1
, a
[2], a
[3],
2295 (struct timespec __user
*)a
[4]);
2298 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2299 (int __user
*)a
[2], a
[3]);
2308 #endif /* __ARCH_WANT_SYS_SOCKETCALL */
2311 * sock_register - add a socket protocol handler
2312 * @ops: description of protocol
2314 * This function is called by a protocol handler that wants to
2315 * advertise its address family, and have it linked into the
2316 * socket interface. The value ops->family coresponds to the
2317 * socket system call protocol family.
2319 int sock_register(const struct net_proto_family
*ops
)
2323 if (ops
->family
>= NPROTO
) {
2324 printk(KERN_CRIT
"protocol %d >= NPROTO(%d)\n", ops
->family
,
2329 spin_lock(&net_family_lock
);
2330 if (net_families
[ops
->family
])
2333 net_families
[ops
->family
] = ops
;
2336 spin_unlock(&net_family_lock
);
2338 printk(KERN_INFO
"NET: Registered protocol family %d\n", ops
->family
);
2341 EXPORT_SYMBOL(sock_register
);
2344 * sock_unregister - remove a protocol handler
2345 * @family: protocol family to remove
2347 * This function is called by a protocol handler that wants to
2348 * remove its address family, and have it unlinked from the
2349 * new socket creation.
2351 * If protocol handler is a module, then it can use module reference
2352 * counts to protect against new references. If protocol handler is not
2353 * a module then it needs to provide its own protection in
2354 * the ops->create routine.
2356 void sock_unregister(int family
)
2358 BUG_ON(family
< 0 || family
>= NPROTO
);
2360 spin_lock(&net_family_lock
);
2361 net_families
[family
] = NULL
;
2362 spin_unlock(&net_family_lock
);
2366 printk(KERN_INFO
"NET: Unregistered protocol family %d\n", family
);
2368 EXPORT_SYMBOL(sock_unregister
);
2370 static int __init
sock_init(void)
2373 * Initialize sock SLAB cache.
2379 * Initialize skbuff SLAB cache
2384 * Initialize the protocols module.
2388 register_filesystem(&sock_fs_type
);
2389 sock_mnt
= kern_mount(&sock_fs_type
);
2391 /* The real protocol initialization is performed in later initcalls.
2394 #ifdef CONFIG_NETFILTER
2398 #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
2399 skb_timestamping_init();
2405 core_initcall(sock_init
); /* early initcall */
2407 #ifdef CONFIG_PROC_FS
2408 void socket_seq_show(struct seq_file
*seq
)
2413 for_each_possible_cpu(cpu
)
2414 counter
+= per_cpu(sockets_in_use
, cpu
);
2416 /* It can be negative, by the way. 8) */
2420 seq_printf(seq
, "sockets: used %d\n", counter
);
2422 #endif /* CONFIG_PROC_FS */
2424 #ifdef CONFIG_COMPAT
2425 static int do_siocgstamp(struct net
*net
, struct socket
*sock
,
2426 unsigned int cmd
, struct compat_timeval __user
*up
)
2428 mm_segment_t old_fs
= get_fs();
2433 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&ktv
);
2436 err
= put_user(ktv
.tv_sec
, &up
->tv_sec
);
2437 err
|= __put_user(ktv
.tv_usec
, &up
->tv_usec
);
2442 static int do_siocgstampns(struct net
*net
, struct socket
*sock
,
2443 unsigned int cmd
, struct compat_timespec __user
*up
)
2445 mm_segment_t old_fs
= get_fs();
2446 struct timespec kts
;
2450 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&kts
);
2453 err
= put_user(kts
.tv_sec
, &up
->tv_sec
);
2454 err
|= __put_user(kts
.tv_nsec
, &up
->tv_nsec
);
2459 static int dev_ifname32(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2461 struct ifreq __user
*uifr
;
2464 uifr
= compat_alloc_user_space(sizeof(struct ifreq
));
2465 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2468 err
= dev_ioctl(net
, SIOCGIFNAME
, uifr
);
2472 if (copy_in_user(uifr32
, uifr
, sizeof(struct compat_ifreq
)))
2478 static int dev_ifconf(struct net
*net
, struct compat_ifconf __user
*uifc32
)
2480 struct compat_ifconf ifc32
;
2482 struct ifconf __user
*uifc
;
2483 struct compat_ifreq __user
*ifr32
;
2484 struct ifreq __user
*ifr
;
2488 if (copy_from_user(&ifc32
, uifc32
, sizeof(struct compat_ifconf
)))
2491 if (ifc32
.ifcbuf
== 0) {
2495 uifc
= compat_alloc_user_space(sizeof(struct ifconf
));
2497 size_t len
= ((ifc32
.ifc_len
/ sizeof(struct compat_ifreq
)) + 1) *
2498 sizeof(struct ifreq
);
2499 uifc
= compat_alloc_user_space(sizeof(struct ifconf
) + len
);
2501 ifr
= ifc
.ifc_req
= (void __user
*)(uifc
+ 1);
2502 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2503 for (i
= 0; i
< ifc32
.ifc_len
; i
+= sizeof(struct compat_ifreq
)) {
2504 if (copy_in_user(ifr
, ifr32
, sizeof(struct compat_ifreq
)))
2510 if (copy_to_user(uifc
, &ifc
, sizeof(struct ifconf
)))
2513 err
= dev_ioctl(net
, SIOCGIFCONF
, uifc
);
2517 if (copy_from_user(&ifc
, uifc
, sizeof(struct ifconf
)))
2521 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2523 i
+ sizeof(struct compat_ifreq
) <= ifc32
.ifc_len
&& j
< ifc
.ifc_len
;
2524 i
+= sizeof(struct compat_ifreq
), j
+= sizeof(struct ifreq
)) {
2525 if (copy_in_user(ifr32
, ifr
, sizeof(struct compat_ifreq
)))
2531 if (ifc32
.ifcbuf
== 0) {
2532 /* Translate from 64-bit structure multiple to
2536 i
= ((i
/ sizeof(struct ifreq
)) * sizeof(struct compat_ifreq
));
2541 if (copy_to_user(uifc32
, &ifc32
, sizeof(struct compat_ifconf
)))
2547 static int ethtool_ioctl(struct net
*net
, struct compat_ifreq __user
*ifr32
)
2549 struct ifreq __user
*ifr
;
2553 ifr
= compat_alloc_user_space(sizeof(*ifr
));
2555 if (copy_in_user(&ifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2558 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2561 datap
= compat_ptr(data
);
2562 if (put_user(datap
, &ifr
->ifr_ifru
.ifru_data
))
2565 return dev_ioctl(net
, SIOCETHTOOL
, ifr
);
2568 static int compat_siocwandev(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2571 compat_uptr_t uptr32
;
2572 struct ifreq __user
*uifr
;
2574 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2575 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2578 if (get_user(uptr32
, &uifr32
->ifr_settings
.ifs_ifsu
))
2581 uptr
= compat_ptr(uptr32
);
2583 if (put_user(uptr
, &uifr
->ifr_settings
.ifs_ifsu
.raw_hdlc
))
2586 return dev_ioctl(net
, SIOCWANDEV
, uifr
);
2589 static int bond_ioctl(struct net
*net
, unsigned int cmd
,
2590 struct compat_ifreq __user
*ifr32
)
2593 struct ifreq __user
*uifr
;
2594 mm_segment_t old_fs
;
2600 case SIOCBONDENSLAVE
:
2601 case SIOCBONDRELEASE
:
2602 case SIOCBONDSETHWADDR
:
2603 case SIOCBONDCHANGEACTIVE
:
2604 if (copy_from_user(&kifr
, ifr32
, sizeof(struct compat_ifreq
)))
2609 err
= dev_ioctl(net
, cmd
, &kifr
);
2613 case SIOCBONDSLAVEINFOQUERY
:
2614 case SIOCBONDINFOQUERY
:
2615 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2616 if (copy_in_user(&uifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2619 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2622 datap
= compat_ptr(data
);
2623 if (put_user(datap
, &uifr
->ifr_ifru
.ifru_data
))
2626 return dev_ioctl(net
, cmd
, uifr
);
2632 static int siocdevprivate_ioctl(struct net
*net
, unsigned int cmd
,
2633 struct compat_ifreq __user
*u_ifreq32
)
2635 struct ifreq __user
*u_ifreq64
;
2636 char tmp_buf
[IFNAMSIZ
];
2637 void __user
*data64
;
2640 if (copy_from_user(&tmp_buf
[0], &(u_ifreq32
->ifr_ifrn
.ifrn_name
[0]),
2643 if (__get_user(data32
, &u_ifreq32
->ifr_ifru
.ifru_data
))
2645 data64
= compat_ptr(data32
);
2647 u_ifreq64
= compat_alloc_user_space(sizeof(*u_ifreq64
));
2649 /* Don't check these user accesses, just let that get trapped
2650 * in the ioctl handler instead.
2652 if (copy_to_user(&u_ifreq64
->ifr_ifrn
.ifrn_name
[0], &tmp_buf
[0],
2655 if (__put_user(data64
, &u_ifreq64
->ifr_ifru
.ifru_data
))
2658 return dev_ioctl(net
, cmd
, u_ifreq64
);
2661 static int dev_ifsioc(struct net
*net
, struct socket
*sock
,
2662 unsigned int cmd
, struct compat_ifreq __user
*uifr32
)
2664 struct ifreq __user
*uifr
;
2667 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2668 if (copy_in_user(uifr
, uifr32
, sizeof(*uifr32
)))
2671 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)uifr
);
2682 case SIOCGIFBRDADDR
:
2683 case SIOCGIFDSTADDR
:
2684 case SIOCGIFNETMASK
:
2689 if (copy_in_user(uifr32
, uifr
, sizeof(*uifr32
)))
2697 static int compat_sioc_ifmap(struct net
*net
, unsigned int cmd
,
2698 struct compat_ifreq __user
*uifr32
)
2701 struct compat_ifmap __user
*uifmap32
;
2702 mm_segment_t old_fs
;
2705 uifmap32
= &uifr32
->ifr_ifru
.ifru_map
;
2706 err
= copy_from_user(&ifr
, uifr32
, sizeof(ifr
.ifr_name
));
2707 err
|= __get_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
2708 err
|= __get_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
2709 err
|= __get_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
2710 err
|= __get_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
2711 err
|= __get_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
2712 err
|= __get_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
2718 err
= dev_ioctl(net
, cmd
, (void __user
*)&ifr
);
2721 if (cmd
== SIOCGIFMAP
&& !err
) {
2722 err
= copy_to_user(uifr32
, &ifr
, sizeof(ifr
.ifr_name
));
2723 err
|= __put_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
2724 err
|= __put_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
2725 err
|= __put_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
2726 err
|= __put_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
2727 err
|= __put_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
2728 err
|= __put_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
2735 static int compat_siocshwtstamp(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2738 compat_uptr_t uptr32
;
2739 struct ifreq __user
*uifr
;
2741 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2742 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2745 if (get_user(uptr32
, &uifr32
->ifr_data
))
2748 uptr
= compat_ptr(uptr32
);
2750 if (put_user(uptr
, &uifr
->ifr_data
))
2753 return dev_ioctl(net
, SIOCSHWTSTAMP
, uifr
);
2758 struct sockaddr rt_dst
; /* target address */
2759 struct sockaddr rt_gateway
; /* gateway addr (RTF_GATEWAY) */
2760 struct sockaddr rt_genmask
; /* target network mask (IP) */
2761 unsigned short rt_flags
;
2764 unsigned char rt_tos
;
2765 unsigned char rt_class
;
2767 short rt_metric
; /* +1 for binary compatibility! */
2768 /* char * */ u32 rt_dev
; /* forcing the device at add */
2769 u32 rt_mtu
; /* per route MTU/Window */
2770 u32 rt_window
; /* Window clamping */
2771 unsigned short rt_irtt
; /* Initial RTT */
2774 struct in6_rtmsg32
{
2775 struct in6_addr rtmsg_dst
;
2776 struct in6_addr rtmsg_src
;
2777 struct in6_addr rtmsg_gateway
;
2787 static int routing_ioctl(struct net
*net
, struct socket
*sock
,
2788 unsigned int cmd
, void __user
*argp
)
2792 struct in6_rtmsg r6
;
2796 mm_segment_t old_fs
= get_fs();
2798 if (sock
&& sock
->sk
&& sock
->sk
->sk_family
== AF_INET6
) { /* ipv6 */
2799 struct in6_rtmsg32 __user
*ur6
= argp
;
2800 ret
= copy_from_user(&r6
.rtmsg_dst
, &(ur6
->rtmsg_dst
),
2801 3 * sizeof(struct in6_addr
));
2802 ret
|= __get_user(r6
.rtmsg_type
, &(ur6
->rtmsg_type
));
2803 ret
|= __get_user(r6
.rtmsg_dst_len
, &(ur6
->rtmsg_dst_len
));
2804 ret
|= __get_user(r6
.rtmsg_src_len
, &(ur6
->rtmsg_src_len
));
2805 ret
|= __get_user(r6
.rtmsg_metric
, &(ur6
->rtmsg_metric
));
2806 ret
|= __get_user(r6
.rtmsg_info
, &(ur6
->rtmsg_info
));
2807 ret
|= __get_user(r6
.rtmsg_flags
, &(ur6
->rtmsg_flags
));
2808 ret
|= __get_user(r6
.rtmsg_ifindex
, &(ur6
->rtmsg_ifindex
));
2812 struct rtentry32 __user
*ur4
= argp
;
2813 ret
= copy_from_user(&r4
.rt_dst
, &(ur4
->rt_dst
),
2814 3 * sizeof(struct sockaddr
));
2815 ret
|= __get_user(r4
.rt_flags
, &(ur4
->rt_flags
));
2816 ret
|= __get_user(r4
.rt_metric
, &(ur4
->rt_metric
));
2817 ret
|= __get_user(r4
.rt_mtu
, &(ur4
->rt_mtu
));
2818 ret
|= __get_user(r4
.rt_window
, &(ur4
->rt_window
));
2819 ret
|= __get_user(r4
.rt_irtt
, &(ur4
->rt_irtt
));
2820 ret
|= __get_user(rtdev
, &(ur4
->rt_dev
));
2822 ret
|= copy_from_user(devname
, compat_ptr(rtdev
), 15);
2823 r4
.rt_dev
= devname
; devname
[15] = 0;
2836 ret
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long) r
);
2843 /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
2844 * for some operations; this forces use of the newer bridge-utils that
2845 * use compatiable ioctls
2847 static int old_bridge_ioctl(compat_ulong_t __user
*argp
)
2851 if (get_user(tmp
, argp
))
2853 if (tmp
== BRCTL_GET_VERSION
)
2854 return BRCTL_VERSION
+ 1;
2858 static int compat_sock_ioctl_trans(struct file
*file
, struct socket
*sock
,
2859 unsigned int cmd
, unsigned long arg
)
2861 void __user
*argp
= compat_ptr(arg
);
2862 struct sock
*sk
= sock
->sk
;
2863 struct net
*net
= sock_net(sk
);
2865 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15))
2866 return siocdevprivate_ioctl(net
, cmd
, argp
);
2871 return old_bridge_ioctl(argp
);
2873 return dev_ifname32(net
, argp
);
2875 return dev_ifconf(net
, argp
);
2877 return ethtool_ioctl(net
, argp
);
2879 return compat_siocwandev(net
, argp
);
2882 return compat_sioc_ifmap(net
, cmd
, argp
);
2883 case SIOCBONDENSLAVE
:
2884 case SIOCBONDRELEASE
:
2885 case SIOCBONDSETHWADDR
:
2886 case SIOCBONDSLAVEINFOQUERY
:
2887 case SIOCBONDINFOQUERY
:
2888 case SIOCBONDCHANGEACTIVE
:
2889 return bond_ioctl(net
, cmd
, argp
);
2892 return routing_ioctl(net
, sock
, cmd
, argp
);
2894 return do_siocgstamp(net
, sock
, cmd
, argp
);
2896 return do_siocgstampns(net
, sock
, cmd
, argp
);
2898 return compat_siocshwtstamp(net
, argp
);
2910 return sock_ioctl(file
, cmd
, arg
);
2927 case SIOCSIFHWBROADCAST
:
2929 case SIOCGIFBRDADDR
:
2930 case SIOCSIFBRDADDR
:
2931 case SIOCGIFDSTADDR
:
2932 case SIOCSIFDSTADDR
:
2933 case SIOCGIFNETMASK
:
2934 case SIOCSIFNETMASK
:
2945 return dev_ifsioc(net
, sock
, cmd
, argp
);
2951 return sock_do_ioctl(net
, sock
, cmd
, arg
);
2954 /* Prevent warning from compat_sys_ioctl, these always
2955 * result in -EINVAL in the native case anyway. */
2968 return -ENOIOCTLCMD
;
2971 static long compat_sock_ioctl(struct file
*file
, unsigned cmd
,
2974 struct socket
*sock
= file
->private_data
;
2975 int ret
= -ENOIOCTLCMD
;
2982 if (sock
->ops
->compat_ioctl
)
2983 ret
= sock
->ops
->compat_ioctl(sock
, cmd
, arg
);
2985 if (ret
== -ENOIOCTLCMD
&&
2986 (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
))
2987 ret
= compat_wext_handle_ioctl(net
, cmd
, arg
);
2989 if (ret
== -ENOIOCTLCMD
)
2990 ret
= compat_sock_ioctl_trans(file
, sock
, cmd
, arg
);
2996 int kernel_bind(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
)
2998 return sock
->ops
->bind(sock
, addr
, addrlen
);
3000 EXPORT_SYMBOL(kernel_bind
);
3002 int kernel_listen(struct socket
*sock
, int backlog
)
3004 return sock
->ops
->listen(sock
, backlog
);
3006 EXPORT_SYMBOL(kernel_listen
);
3008 int kernel_accept(struct socket
*sock
, struct socket
**newsock
, int flags
)
3010 struct sock
*sk
= sock
->sk
;
3013 err
= sock_create_lite(sk
->sk_family
, sk
->sk_type
, sk
->sk_protocol
,
3018 err
= sock
->ops
->accept(sock
, *newsock
, flags
);
3020 sock_release(*newsock
);
3025 (*newsock
)->ops
= sock
->ops
;
3026 __module_get((*newsock
)->ops
->owner
);
3031 EXPORT_SYMBOL(kernel_accept
);
3033 int kernel_connect(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
,
3036 return sock
->ops
->connect(sock
, addr
, addrlen
, flags
);
3038 EXPORT_SYMBOL(kernel_connect
);
3040 int kernel_getsockname(struct socket
*sock
, struct sockaddr
*addr
,
3043 return sock
->ops
->getname(sock
, addr
, addrlen
, 0);
3045 EXPORT_SYMBOL(kernel_getsockname
);
3047 int kernel_getpeername(struct socket
*sock
, struct sockaddr
*addr
,
3050 return sock
->ops
->getname(sock
, addr
, addrlen
, 1);
3052 EXPORT_SYMBOL(kernel_getpeername
);
3054 int kernel_getsockopt(struct socket
*sock
, int level
, int optname
,
3055 char *optval
, int *optlen
)
3057 mm_segment_t oldfs
= get_fs();
3061 if (level
== SOL_SOCKET
)
3062 err
= sock_getsockopt(sock
, level
, optname
, optval
, optlen
);
3064 err
= sock
->ops
->getsockopt(sock
, level
, optname
, optval
,
3069 EXPORT_SYMBOL(kernel_getsockopt
);
3071 int kernel_setsockopt(struct socket
*sock
, int level
, int optname
,
3072 char *optval
, unsigned int optlen
)
3074 mm_segment_t oldfs
= get_fs();
3078 if (level
== SOL_SOCKET
)
3079 err
= sock_setsockopt(sock
, level
, optname
, optval
, optlen
);
3081 err
= sock
->ops
->setsockopt(sock
, level
, optname
, optval
,
3086 EXPORT_SYMBOL(kernel_setsockopt
);
3088 int kernel_sendpage(struct socket
*sock
, struct page
*page
, int offset
,
3089 size_t size
, int flags
)
3091 sock_update_classid(sock
->sk
);
3093 if (sock
->ops
->sendpage
)
3094 return sock
->ops
->sendpage(sock
, page
, offset
, size
, flags
);
3096 return sock_no_sendpage(sock
, page
, offset
, size
, flags
);
3098 EXPORT_SYMBOL(kernel_sendpage
);
3100 int kernel_sock_ioctl(struct socket
*sock
, int cmd
, unsigned long arg
)
3102 mm_segment_t oldfs
= get_fs();
3106 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
3111 EXPORT_SYMBOL(kernel_sock_ioctl
);
3113 int kernel_sock_shutdown(struct socket
*sock
, enum sock_shutdown_cmd how
)
3115 return sock
->ops
->shutdown(sock
, how
);
3117 EXPORT_SYMBOL(kernel_sock_shutdown
);