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/if_bridge.h>
73 #include <linux/if_frad.h>
74 #include <linux/if_vlan.h>
75 #include <linux/init.h>
76 #include <linux/poll.h>
77 #include <linux/cache.h>
78 #include <linux/module.h>
79 #include <linux/highmem.h>
80 #include <linux/mount.h>
81 #include <linux/security.h>
82 #include <linux/syscalls.h>
83 #include <linux/compat.h>
84 #include <linux/kmod.h>
85 #include <linux/audit.h>
86 #include <linux/wireless.h>
87 #include <linux/nsproxy.h>
88 #include <linux/magic.h>
89 #include <linux/slab.h>
90 #include <linux/xattr.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 __rcu
*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_storage
*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 static int move_addr_to_user(struct sockaddr_storage
*kaddr
, int klen
,
213 void __user
*uaddr
, int __user
*ulen
)
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
;
243 struct socket_wq
*wq
;
245 ei
= kmem_cache_alloc(sock_inode_cachep
, GFP_KERNEL
);
248 wq
= kmalloc(sizeof(*wq
), GFP_KERNEL
);
250 kmem_cache_free(sock_inode_cachep
, ei
);
253 init_waitqueue_head(&wq
->wait
);
254 wq
->fasync_list
= NULL
;
255 RCU_INIT_POINTER(ei
->socket
.wq
, wq
);
257 ei
->socket
.state
= SS_UNCONNECTED
;
258 ei
->socket
.flags
= 0;
259 ei
->socket
.ops
= NULL
;
260 ei
->socket
.sk
= NULL
;
261 ei
->socket
.file
= NULL
;
263 return &ei
->vfs_inode
;
266 static void sock_destroy_inode(struct inode
*inode
)
268 struct socket_alloc
*ei
;
269 struct socket_wq
*wq
;
271 ei
= container_of(inode
, struct socket_alloc
, vfs_inode
);
272 wq
= rcu_dereference_protected(ei
->socket
.wq
, 1);
274 kmem_cache_free(sock_inode_cachep
, ei
);
277 static void init_once(void *foo
)
279 struct socket_alloc
*ei
= (struct socket_alloc
*)foo
;
281 inode_init_once(&ei
->vfs_inode
);
284 static int init_inodecache(void)
286 sock_inode_cachep
= kmem_cache_create("sock_inode_cache",
287 sizeof(struct socket_alloc
),
289 (SLAB_HWCACHE_ALIGN
|
290 SLAB_RECLAIM_ACCOUNT
|
293 if (sock_inode_cachep
== NULL
)
298 static const struct super_operations sockfs_ops
= {
299 .alloc_inode
= sock_alloc_inode
,
300 .destroy_inode
= sock_destroy_inode
,
301 .statfs
= simple_statfs
,
305 * sockfs_dname() is called from d_path().
307 static char *sockfs_dname(struct dentry
*dentry
, char *buffer
, int buflen
)
309 return dynamic_dname(dentry
, buffer
, buflen
, "socket:[%lu]",
310 dentry
->d_inode
->i_ino
);
313 static const struct dentry_operations sockfs_dentry_operations
= {
314 .d_dname
= sockfs_dname
,
317 static struct dentry
*sockfs_mount(struct file_system_type
*fs_type
,
318 int flags
, const char *dev_name
, void *data
)
320 return mount_pseudo(fs_type
, "socket:", &sockfs_ops
,
321 &sockfs_dentry_operations
, SOCKFS_MAGIC
);
324 static struct vfsmount
*sock_mnt __read_mostly
;
326 static struct file_system_type sock_fs_type
= {
328 .mount
= sockfs_mount
,
329 .kill_sb
= kill_anon_super
,
333 * Obtains the first available file descriptor and sets it up for use.
335 * These functions create file structures and maps them to fd space
336 * of the current process. On success it returns file descriptor
337 * and file struct implicitly stored in sock->file.
338 * Note that another thread may close file descriptor before we return
339 * from this function. We use the fact that now we do not refer
340 * to socket after mapping. If one day we will need it, this
341 * function will increment ref. count on file by 1.
343 * In any case returned fd MAY BE not valid!
344 * This race condition is unavoidable
345 * with shared fd spaces, we cannot solve it inside kernel,
346 * but we take care of internal coherence yet.
349 struct file
*sock_alloc_file(struct socket
*sock
, int flags
, const char *dname
)
351 struct qstr name
= { .name
= "" };
357 name
.len
= strlen(name
.name
);
358 } else if (sock
->sk
) {
359 name
.name
= sock
->sk
->sk_prot_creator
->name
;
360 name
.len
= strlen(name
.name
);
362 path
.dentry
= d_alloc_pseudo(sock_mnt
->mnt_sb
, &name
);
363 if (unlikely(!path
.dentry
))
364 return ERR_PTR(-ENOMEM
);
365 path
.mnt
= mntget(sock_mnt
);
367 d_instantiate(path
.dentry
, SOCK_INODE(sock
));
368 SOCK_INODE(sock
)->i_fop
= &socket_file_ops
;
370 file
= alloc_file(&path
, FMODE_READ
| FMODE_WRITE
,
372 if (unlikely(IS_ERR(file
))) {
373 /* drop dentry, keep inode */
374 ihold(path
.dentry
->d_inode
);
380 file
->f_flags
= O_RDWR
| (flags
& O_NONBLOCK
);
381 file
->private_data
= sock
;
384 EXPORT_SYMBOL(sock_alloc_file
);
386 static int sock_map_fd(struct socket
*sock
, int flags
)
388 struct file
*newfile
;
389 int fd
= get_unused_fd_flags(flags
);
390 if (unlikely(fd
< 0))
393 newfile
= sock_alloc_file(sock
, flags
, NULL
);
394 if (likely(!IS_ERR(newfile
))) {
395 fd_install(fd
, newfile
);
400 return PTR_ERR(newfile
);
403 struct socket
*sock_from_file(struct file
*file
, int *err
)
405 if (file
->f_op
== &socket_file_ops
)
406 return file
->private_data
; /* set in sock_map_fd */
411 EXPORT_SYMBOL(sock_from_file
);
414 * sockfd_lookup - Go from a file number to its socket slot
416 * @err: pointer to an error code return
418 * The file handle passed in is locked and the socket it is bound
419 * too is returned. If an error occurs the err pointer is overwritten
420 * with a negative errno code and NULL is returned. The function checks
421 * for both invalid handles and passing a handle which is not a socket.
423 * On a success the socket object pointer is returned.
426 struct socket
*sockfd_lookup(int fd
, int *err
)
437 sock
= sock_from_file(file
, err
);
442 EXPORT_SYMBOL(sockfd_lookup
);
444 static struct socket
*sockfd_lookup_light(int fd
, int *err
, int *fput_needed
)
450 file
= fget_light(fd
, fput_needed
);
452 sock
= sock_from_file(file
, err
);
455 fput_light(file
, *fput_needed
);
460 #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname"
461 #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX)
462 #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1)
463 static ssize_t
sockfs_getxattr(struct dentry
*dentry
,
464 const char *name
, void *value
, size_t size
)
466 const char *proto_name
;
471 if (!strncmp(name
, XATTR_NAME_SOCKPROTONAME
, XATTR_NAME_SOCKPROTONAME_LEN
)) {
472 proto_name
= dentry
->d_name
.name
;
473 proto_size
= strlen(proto_name
);
477 if (proto_size
+ 1 > size
)
480 strncpy(value
, proto_name
, proto_size
+ 1);
482 error
= proto_size
+ 1;
489 static ssize_t
sockfs_listxattr(struct dentry
*dentry
, char *buffer
,
495 len
= security_inode_listsecurity(dentry
->d_inode
, buffer
, size
);
505 len
= (XATTR_NAME_SOCKPROTONAME_LEN
+ 1);
510 memcpy(buffer
, XATTR_NAME_SOCKPROTONAME
, len
);
517 static const struct inode_operations sockfs_inode_ops
= {
518 .getxattr
= sockfs_getxattr
,
519 .listxattr
= sockfs_listxattr
,
523 * sock_alloc - allocate a socket
525 * Allocate a new inode and socket object. The two are bound together
526 * and initialised. The socket is then returned. If we are out of inodes
530 static struct socket
*sock_alloc(void)
535 inode
= new_inode_pseudo(sock_mnt
->mnt_sb
);
539 sock
= SOCKET_I(inode
);
541 kmemcheck_annotate_bitfield(sock
, type
);
542 inode
->i_ino
= get_next_ino();
543 inode
->i_mode
= S_IFSOCK
| S_IRWXUGO
;
544 inode
->i_uid
= current_fsuid();
545 inode
->i_gid
= current_fsgid();
546 inode
->i_op
= &sockfs_inode_ops
;
548 this_cpu_add(sockets_in_use
, 1);
553 * In theory you can't get an open on this inode, but /proc provides
554 * a back door. Remember to keep it shut otherwise you'll let the
555 * creepy crawlies in.
558 static int sock_no_open(struct inode
*irrelevant
, struct file
*dontcare
)
563 const struct file_operations bad_sock_fops
= {
564 .owner
= THIS_MODULE
,
565 .open
= sock_no_open
,
566 .llseek
= noop_llseek
,
570 * sock_release - close a socket
571 * @sock: socket to close
573 * The socket is released from the protocol stack if it has a release
574 * callback, and the inode is then released if the socket is bound to
575 * an inode not a file.
578 void sock_release(struct socket
*sock
)
581 struct module
*owner
= sock
->ops
->owner
;
583 sock
->ops
->release(sock
);
588 if (rcu_dereference_protected(sock
->wq
, 1)->fasync_list
)
589 printk(KERN_ERR
"sock_release: fasync list not empty!\n");
591 if (test_bit(SOCK_EXTERNALLY_ALLOCATED
, &sock
->flags
))
594 this_cpu_sub(sockets_in_use
, 1);
596 iput(SOCK_INODE(sock
));
601 EXPORT_SYMBOL(sock_release
);
603 int sock_tx_timestamp(struct sock
*sk
, __u8
*tx_flags
)
606 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_HARDWARE
))
607 *tx_flags
|= SKBTX_HW_TSTAMP
;
608 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_SOFTWARE
))
609 *tx_flags
|= SKBTX_SW_TSTAMP
;
610 if (sock_flag(sk
, SOCK_WIFI_STATUS
))
611 *tx_flags
|= SKBTX_WIFI_STATUS
;
614 EXPORT_SYMBOL(sock_tx_timestamp
);
616 static inline int __sock_sendmsg_nosec(struct kiocb
*iocb
, struct socket
*sock
,
617 struct msghdr
*msg
, size_t size
)
619 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
626 return sock
->ops
->sendmsg(iocb
, sock
, msg
, size
);
629 static inline int __sock_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
630 struct msghdr
*msg
, size_t size
)
632 int err
= security_socket_sendmsg(sock
, msg
, size
);
634 return err
?: __sock_sendmsg_nosec(iocb
, sock
, msg
, size
);
637 int sock_sendmsg(struct socket
*sock
, struct msghdr
*msg
, size_t size
)
640 struct sock_iocb siocb
;
643 init_sync_kiocb(&iocb
, NULL
);
644 iocb
.private = &siocb
;
645 ret
= __sock_sendmsg(&iocb
, sock
, msg
, size
);
646 if (-EIOCBQUEUED
== ret
)
647 ret
= wait_on_sync_kiocb(&iocb
);
650 EXPORT_SYMBOL(sock_sendmsg
);
652 static int sock_sendmsg_nosec(struct socket
*sock
, struct msghdr
*msg
, size_t size
)
655 struct sock_iocb siocb
;
658 init_sync_kiocb(&iocb
, NULL
);
659 iocb
.private = &siocb
;
660 ret
= __sock_sendmsg_nosec(&iocb
, sock
, msg
, size
);
661 if (-EIOCBQUEUED
== ret
)
662 ret
= wait_on_sync_kiocb(&iocb
);
666 int kernel_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
667 struct kvec
*vec
, size_t num
, size_t size
)
669 mm_segment_t oldfs
= get_fs();
674 * the following is safe, since for compiler definitions of kvec and
675 * iovec are identical, yielding the same in-core layout and alignment
677 msg
->msg_iov
= (struct iovec
*)vec
;
678 msg
->msg_iovlen
= num
;
679 result
= sock_sendmsg(sock
, msg
, size
);
683 EXPORT_SYMBOL(kernel_sendmsg
);
685 static int ktime2ts(ktime_t kt
, struct timespec
*ts
)
688 *ts
= ktime_to_timespec(kt
);
696 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
698 void __sock_recv_timestamp(struct msghdr
*msg
, struct sock
*sk
,
701 int need_software_tstamp
= sock_flag(sk
, SOCK_RCVTSTAMP
);
702 struct timespec ts
[3];
704 struct skb_shared_hwtstamps
*shhwtstamps
=
707 /* Race occurred between timestamp enabling and packet
708 receiving. Fill in the current time for now. */
709 if (need_software_tstamp
&& skb
->tstamp
.tv64
== 0)
710 __net_timestamp(skb
);
712 if (need_software_tstamp
) {
713 if (!sock_flag(sk
, SOCK_RCVTSTAMPNS
)) {
715 skb_get_timestamp(skb
, &tv
);
716 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMP
,
719 skb_get_timestampns(skb
, &ts
[0]);
720 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMPNS
,
721 sizeof(ts
[0]), &ts
[0]);
726 memset(ts
, 0, sizeof(ts
));
727 if (skb
->tstamp
.tv64
&&
728 sock_flag(sk
, SOCK_TIMESTAMPING_SOFTWARE
)) {
729 skb_get_timestampns(skb
, ts
+ 0);
733 if (sock_flag(sk
, SOCK_TIMESTAMPING_SYS_HARDWARE
) &&
734 ktime2ts(shhwtstamps
->syststamp
, ts
+ 1))
736 if (sock_flag(sk
, SOCK_TIMESTAMPING_RAW_HARDWARE
) &&
737 ktime2ts(shhwtstamps
->hwtstamp
, ts
+ 2))
741 put_cmsg(msg
, SOL_SOCKET
,
742 SCM_TIMESTAMPING
, sizeof(ts
), &ts
);
744 EXPORT_SYMBOL_GPL(__sock_recv_timestamp
);
746 void __sock_recv_wifi_status(struct msghdr
*msg
, struct sock
*sk
,
751 if (!sock_flag(sk
, SOCK_WIFI_STATUS
))
753 if (!skb
->wifi_acked_valid
)
756 ack
= skb
->wifi_acked
;
758 put_cmsg(msg
, SOL_SOCKET
, SCM_WIFI_STATUS
, sizeof(ack
), &ack
);
760 EXPORT_SYMBOL_GPL(__sock_recv_wifi_status
);
762 static inline void sock_recv_drops(struct msghdr
*msg
, struct sock
*sk
,
765 if (sock_flag(sk
, SOCK_RXQ_OVFL
) && skb
&& skb
->dropcount
)
766 put_cmsg(msg
, SOL_SOCKET
, SO_RXQ_OVFL
,
767 sizeof(__u32
), &skb
->dropcount
);
770 void __sock_recv_ts_and_drops(struct msghdr
*msg
, struct sock
*sk
,
773 sock_recv_timestamp(msg
, sk
, skb
);
774 sock_recv_drops(msg
, sk
, skb
);
776 EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops
);
778 static inline int __sock_recvmsg_nosec(struct kiocb
*iocb
, struct socket
*sock
,
779 struct msghdr
*msg
, size_t size
, int flags
)
781 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
789 return sock
->ops
->recvmsg(iocb
, sock
, msg
, size
, flags
);
792 static inline int __sock_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
793 struct msghdr
*msg
, size_t size
, int flags
)
795 int err
= security_socket_recvmsg(sock
, msg
, size
, flags
);
797 return err
?: __sock_recvmsg_nosec(iocb
, sock
, msg
, size
, flags
);
800 int sock_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
801 size_t size
, int flags
)
804 struct sock_iocb siocb
;
807 init_sync_kiocb(&iocb
, NULL
);
808 iocb
.private = &siocb
;
809 ret
= __sock_recvmsg(&iocb
, sock
, msg
, size
, flags
);
810 if (-EIOCBQUEUED
== ret
)
811 ret
= wait_on_sync_kiocb(&iocb
);
814 EXPORT_SYMBOL(sock_recvmsg
);
816 static int sock_recvmsg_nosec(struct socket
*sock
, struct msghdr
*msg
,
817 size_t size
, int flags
)
820 struct sock_iocb siocb
;
823 init_sync_kiocb(&iocb
, NULL
);
824 iocb
.private = &siocb
;
825 ret
= __sock_recvmsg_nosec(&iocb
, sock
, msg
, size
, flags
);
826 if (-EIOCBQUEUED
== ret
)
827 ret
= wait_on_sync_kiocb(&iocb
);
832 * kernel_recvmsg - Receive a message from a socket (kernel space)
833 * @sock: The socket to receive the message from
834 * @msg: Received message
835 * @vec: Input s/g array for message data
836 * @num: Size of input s/g array
837 * @size: Number of bytes to read
838 * @flags: Message flags (MSG_DONTWAIT, etc...)
840 * On return the msg structure contains the scatter/gather array passed in the
841 * vec argument. The array is modified so that it consists of the unfilled
842 * portion of the original array.
844 * The returned value is the total number of bytes received, or an error.
846 int kernel_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
847 struct kvec
*vec
, size_t num
, size_t size
, int flags
)
849 mm_segment_t oldfs
= get_fs();
854 * the following is safe, since for compiler definitions of kvec and
855 * iovec are identical, yielding the same in-core layout and alignment
857 msg
->msg_iov
= (struct iovec
*)vec
, msg
->msg_iovlen
= num
;
858 result
= sock_recvmsg(sock
, msg
, size
, flags
);
862 EXPORT_SYMBOL(kernel_recvmsg
);
864 static void sock_aio_dtor(struct kiocb
*iocb
)
866 kfree(iocb
->private);
869 static ssize_t
sock_sendpage(struct file
*file
, struct page
*page
,
870 int offset
, size_t size
, loff_t
*ppos
, int more
)
875 sock
= file
->private_data
;
877 flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
878 /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */
881 return kernel_sendpage(sock
, page
, offset
, size
, flags
);
884 static ssize_t
sock_splice_read(struct file
*file
, loff_t
*ppos
,
885 struct pipe_inode_info
*pipe
, size_t len
,
888 struct socket
*sock
= file
->private_data
;
890 if (unlikely(!sock
->ops
->splice_read
))
893 return sock
->ops
->splice_read(sock
, ppos
, pipe
, len
, flags
);
896 static struct sock_iocb
*alloc_sock_iocb(struct kiocb
*iocb
,
897 struct sock_iocb
*siocb
)
899 if (!is_sync_kiocb(iocb
)) {
900 siocb
= kmalloc(sizeof(*siocb
), GFP_KERNEL
);
903 iocb
->ki_dtor
= sock_aio_dtor
;
907 iocb
->private = siocb
;
911 static ssize_t
do_sock_read(struct msghdr
*msg
, struct kiocb
*iocb
,
912 struct file
*file
, const struct iovec
*iov
,
913 unsigned long nr_segs
)
915 struct socket
*sock
= file
->private_data
;
919 for (i
= 0; i
< nr_segs
; i
++)
920 size
+= iov
[i
].iov_len
;
922 msg
->msg_name
= NULL
;
923 msg
->msg_namelen
= 0;
924 msg
->msg_control
= NULL
;
925 msg
->msg_controllen
= 0;
926 msg
->msg_iov
= (struct iovec
*)iov
;
927 msg
->msg_iovlen
= nr_segs
;
928 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
930 return __sock_recvmsg(iocb
, sock
, msg
, size
, msg
->msg_flags
);
933 static ssize_t
sock_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
934 unsigned long nr_segs
, loff_t pos
)
936 struct sock_iocb siocb
, *x
;
941 if (iocb
->ki_left
== 0) /* Match SYS5 behaviour */
945 x
= alloc_sock_iocb(iocb
, &siocb
);
948 return do_sock_read(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
951 static ssize_t
do_sock_write(struct msghdr
*msg
, struct kiocb
*iocb
,
952 struct file
*file
, const struct iovec
*iov
,
953 unsigned long nr_segs
)
955 struct socket
*sock
= file
->private_data
;
959 for (i
= 0; i
< nr_segs
; i
++)
960 size
+= iov
[i
].iov_len
;
962 msg
->msg_name
= NULL
;
963 msg
->msg_namelen
= 0;
964 msg
->msg_control
= NULL
;
965 msg
->msg_controllen
= 0;
966 msg
->msg_iov
= (struct iovec
*)iov
;
967 msg
->msg_iovlen
= nr_segs
;
968 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
969 if (sock
->type
== SOCK_SEQPACKET
)
970 msg
->msg_flags
|= MSG_EOR
;
972 return __sock_sendmsg(iocb
, sock
, msg
, size
);
975 static ssize_t
sock_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
976 unsigned long nr_segs
, loff_t pos
)
978 struct sock_iocb siocb
, *x
;
983 x
= alloc_sock_iocb(iocb
, &siocb
);
987 return do_sock_write(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
991 * Atomic setting of ioctl hooks to avoid race
992 * with module unload.
995 static DEFINE_MUTEX(br_ioctl_mutex
);
996 static int (*br_ioctl_hook
) (struct net
*, unsigned int cmd
, void __user
*arg
);
998 void brioctl_set(int (*hook
) (struct net
*, unsigned int, void __user
*))
1000 mutex_lock(&br_ioctl_mutex
);
1001 br_ioctl_hook
= hook
;
1002 mutex_unlock(&br_ioctl_mutex
);
1004 EXPORT_SYMBOL(brioctl_set
);
1006 static DEFINE_MUTEX(vlan_ioctl_mutex
);
1007 static int (*vlan_ioctl_hook
) (struct net
*, void __user
*arg
);
1009 void vlan_ioctl_set(int (*hook
) (struct net
*, void __user
*))
1011 mutex_lock(&vlan_ioctl_mutex
);
1012 vlan_ioctl_hook
= hook
;
1013 mutex_unlock(&vlan_ioctl_mutex
);
1015 EXPORT_SYMBOL(vlan_ioctl_set
);
1017 static DEFINE_MUTEX(dlci_ioctl_mutex
);
1018 static int (*dlci_ioctl_hook
) (unsigned int, void __user
*);
1020 void dlci_ioctl_set(int (*hook
) (unsigned int, void __user
*))
1022 mutex_lock(&dlci_ioctl_mutex
);
1023 dlci_ioctl_hook
= hook
;
1024 mutex_unlock(&dlci_ioctl_mutex
);
1026 EXPORT_SYMBOL(dlci_ioctl_set
);
1028 static long sock_do_ioctl(struct net
*net
, struct socket
*sock
,
1029 unsigned int cmd
, unsigned long arg
)
1032 void __user
*argp
= (void __user
*)arg
;
1034 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
1037 * If this ioctl is unknown try to hand it down
1038 * to the NIC driver.
1040 if (err
== -ENOIOCTLCMD
)
1041 err
= dev_ioctl(net
, cmd
, argp
);
1047 * With an ioctl, arg may well be a user mode pointer, but we don't know
1048 * what to do with it - that's up to the protocol still.
1051 static long sock_ioctl(struct file
*file
, unsigned cmd
, unsigned long arg
)
1053 struct socket
*sock
;
1055 void __user
*argp
= (void __user
*)arg
;
1059 sock
= file
->private_data
;
1062 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15)) {
1063 err
= dev_ioctl(net
, cmd
, argp
);
1065 #ifdef CONFIG_WEXT_CORE
1066 if (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
) {
1067 err
= dev_ioctl(net
, cmd
, argp
);
1074 if (get_user(pid
, (int __user
*)argp
))
1076 err
= f_setown(sock
->file
, pid
, 1);
1080 err
= put_user(f_getown(sock
->file
),
1081 (int __user
*)argp
);
1089 request_module("bridge");
1091 mutex_lock(&br_ioctl_mutex
);
1093 err
= br_ioctl_hook(net
, cmd
, argp
);
1094 mutex_unlock(&br_ioctl_mutex
);
1099 if (!vlan_ioctl_hook
)
1100 request_module("8021q");
1102 mutex_lock(&vlan_ioctl_mutex
);
1103 if (vlan_ioctl_hook
)
1104 err
= vlan_ioctl_hook(net
, argp
);
1105 mutex_unlock(&vlan_ioctl_mutex
);
1110 if (!dlci_ioctl_hook
)
1111 request_module("dlci");
1113 mutex_lock(&dlci_ioctl_mutex
);
1114 if (dlci_ioctl_hook
)
1115 err
= dlci_ioctl_hook(cmd
, argp
);
1116 mutex_unlock(&dlci_ioctl_mutex
);
1119 err
= sock_do_ioctl(net
, sock
, cmd
, arg
);
1125 int sock_create_lite(int family
, int type
, int protocol
, struct socket
**res
)
1128 struct socket
*sock
= NULL
;
1130 err
= security_socket_create(family
, type
, protocol
, 1);
1134 sock
= sock_alloc();
1141 err
= security_socket_post_create(sock
, family
, type
, protocol
, 1);
1153 EXPORT_SYMBOL(sock_create_lite
);
1155 /* No kernel lock held - perfect */
1156 static unsigned int sock_poll(struct file
*file
, poll_table
*wait
)
1158 struct socket
*sock
;
1161 * We can't return errors to poll, so it's either yes or no.
1163 sock
= file
->private_data
;
1164 return sock
->ops
->poll(file
, sock
, wait
);
1167 static int sock_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1169 struct socket
*sock
= file
->private_data
;
1171 return sock
->ops
->mmap(file
, sock
, vma
);
1174 static int sock_close(struct inode
*inode
, struct file
*filp
)
1176 sock_release(SOCKET_I(inode
));
1181 * Update the socket async list
1183 * Fasync_list locking strategy.
1185 * 1. fasync_list is modified only under process context socket lock
1186 * i.e. under semaphore.
1187 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
1188 * or under socket lock
1191 static int sock_fasync(int fd
, struct file
*filp
, int on
)
1193 struct socket
*sock
= filp
->private_data
;
1194 struct sock
*sk
= sock
->sk
;
1195 struct socket_wq
*wq
;
1201 wq
= rcu_dereference_protected(sock
->wq
, sock_owned_by_user(sk
));
1202 fasync_helper(fd
, filp
, on
, &wq
->fasync_list
);
1204 if (!wq
->fasync_list
)
1205 sock_reset_flag(sk
, SOCK_FASYNC
);
1207 sock_set_flag(sk
, SOCK_FASYNC
);
1213 /* This function may be called only under socket lock or callback_lock or rcu_lock */
1215 int sock_wake_async(struct socket
*sock
, int how
, int band
)
1217 struct socket_wq
*wq
;
1222 wq
= rcu_dereference(sock
->wq
);
1223 if (!wq
|| !wq
->fasync_list
) {
1228 case SOCK_WAKE_WAITD
:
1229 if (test_bit(SOCK_ASYNC_WAITDATA
, &sock
->flags
))
1232 case SOCK_WAKE_SPACE
:
1233 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE
, &sock
->flags
))
1238 kill_fasync(&wq
->fasync_list
, SIGIO
, band
);
1241 kill_fasync(&wq
->fasync_list
, SIGURG
, band
);
1246 EXPORT_SYMBOL(sock_wake_async
);
1248 int __sock_create(struct net
*net
, int family
, int type
, int protocol
,
1249 struct socket
**res
, int kern
)
1252 struct socket
*sock
;
1253 const struct net_proto_family
*pf
;
1256 * Check protocol is in range
1258 if (family
< 0 || family
>= NPROTO
)
1259 return -EAFNOSUPPORT
;
1260 if (type
< 0 || type
>= SOCK_MAX
)
1265 This uglymoron is moved from INET layer to here to avoid
1266 deadlock in module load.
1268 if (family
== PF_INET
&& type
== SOCK_PACKET
) {
1272 printk(KERN_INFO
"%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1278 err
= security_socket_create(family
, type
, protocol
, kern
);
1283 * Allocate the socket and allow the family to set things up. if
1284 * the protocol is 0, the family is instructed to select an appropriate
1287 sock
= sock_alloc();
1289 net_warn_ratelimited("socket: no more sockets\n");
1290 return -ENFILE
; /* Not exactly a match, but its the
1291 closest posix thing */
1296 #ifdef CONFIG_MODULES
1297 /* Attempt to load a protocol module if the find failed.
1299 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
1300 * requested real, full-featured networking support upon configuration.
1301 * Otherwise module support will break!
1303 if (rcu_access_pointer(net_families
[family
]) == NULL
)
1304 request_module("net-pf-%d", family
);
1308 pf
= rcu_dereference(net_families
[family
]);
1309 err
= -EAFNOSUPPORT
;
1314 * We will call the ->create function, that possibly is in a loadable
1315 * module, so we have to bump that loadable module refcnt first.
1317 if (!try_module_get(pf
->owner
))
1320 /* Now protected by module ref count */
1323 err
= pf
->create(net
, sock
, protocol
, kern
);
1325 goto out_module_put
;
1328 * Now to bump the refcnt of the [loadable] module that owns this
1329 * socket at sock_release time we decrement its refcnt.
1331 if (!try_module_get(sock
->ops
->owner
))
1332 goto out_module_busy
;
1335 * Now that we're done with the ->create function, the [loadable]
1336 * module can have its refcnt decremented
1338 module_put(pf
->owner
);
1339 err
= security_socket_post_create(sock
, family
, type
, protocol
, kern
);
1341 goto out_sock_release
;
1347 err
= -EAFNOSUPPORT
;
1350 module_put(pf
->owner
);
1357 goto out_sock_release
;
1359 EXPORT_SYMBOL(__sock_create
);
1361 int sock_create(int family
, int type
, int protocol
, struct socket
**res
)
1363 return __sock_create(current
->nsproxy
->net_ns
, family
, type
, protocol
, res
, 0);
1365 EXPORT_SYMBOL(sock_create
);
1367 int sock_create_kern(int family
, int type
, int protocol
, struct socket
**res
)
1369 return __sock_create(&init_net
, family
, type
, protocol
, res
, 1);
1371 EXPORT_SYMBOL(sock_create_kern
);
1373 SYSCALL_DEFINE3(socket
, int, family
, int, type
, int, protocol
)
1376 struct socket
*sock
;
1379 /* Check the SOCK_* constants for consistency. */
1380 BUILD_BUG_ON(SOCK_CLOEXEC
!= O_CLOEXEC
);
1381 BUILD_BUG_ON((SOCK_MAX
| SOCK_TYPE_MASK
) != SOCK_TYPE_MASK
);
1382 BUILD_BUG_ON(SOCK_CLOEXEC
& SOCK_TYPE_MASK
);
1383 BUILD_BUG_ON(SOCK_NONBLOCK
& SOCK_TYPE_MASK
);
1385 flags
= type
& ~SOCK_TYPE_MASK
;
1386 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1388 type
&= SOCK_TYPE_MASK
;
1390 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1391 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1393 retval
= sock_create(family
, type
, protocol
, &sock
);
1397 retval
= sock_map_fd(sock
, flags
& (O_CLOEXEC
| O_NONBLOCK
));
1402 /* It may be already another descriptor 8) Not kernel problem. */
1411 * Create a pair of connected sockets.
1414 SYSCALL_DEFINE4(socketpair
, int, family
, int, type
, int, protocol
,
1415 int __user
*, usockvec
)
1417 struct socket
*sock1
, *sock2
;
1419 struct file
*newfile1
, *newfile2
;
1422 flags
= type
& ~SOCK_TYPE_MASK
;
1423 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1425 type
&= SOCK_TYPE_MASK
;
1427 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1428 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1431 * Obtain the first socket and check if the underlying protocol
1432 * supports the socketpair call.
1435 err
= sock_create(family
, type
, protocol
, &sock1
);
1439 err
= sock_create(family
, type
, protocol
, &sock2
);
1443 err
= sock1
->ops
->socketpair(sock1
, sock2
);
1445 goto out_release_both
;
1447 fd1
= get_unused_fd_flags(flags
);
1448 if (unlikely(fd1
< 0)) {
1450 goto out_release_both
;
1452 fd2
= get_unused_fd_flags(flags
);
1453 if (unlikely(fd2
< 0)) {
1456 goto out_release_both
;
1459 newfile1
= sock_alloc_file(sock1
, flags
, NULL
);
1460 if (unlikely(IS_ERR(newfile1
))) {
1461 err
= PTR_ERR(newfile1
);
1464 goto out_release_both
;
1467 newfile2
= sock_alloc_file(sock2
, flags
, NULL
);
1468 if (IS_ERR(newfile2
)) {
1469 err
= PTR_ERR(newfile2
);
1473 sock_release(sock2
);
1477 audit_fd_pair(fd1
, fd2
);
1478 fd_install(fd1
, newfile1
);
1479 fd_install(fd2
, newfile2
);
1480 /* fd1 and fd2 may be already another descriptors.
1481 * Not kernel problem.
1484 err
= put_user(fd1
, &usockvec
[0]);
1486 err
= put_user(fd2
, &usockvec
[1]);
1495 sock_release(sock2
);
1497 sock_release(sock1
);
1503 * Bind a name to a socket. Nothing much to do here since it's
1504 * the protocol's responsibility to handle the local address.
1506 * We move the socket address to kernel space before we call
1507 * the protocol layer (having also checked the address is ok).
1510 SYSCALL_DEFINE3(bind
, int, fd
, struct sockaddr __user
*, umyaddr
, int, addrlen
)
1512 struct socket
*sock
;
1513 struct sockaddr_storage address
;
1514 int err
, fput_needed
;
1516 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1518 err
= move_addr_to_kernel(umyaddr
, addrlen
, &address
);
1520 err
= security_socket_bind(sock
,
1521 (struct sockaddr
*)&address
,
1524 err
= sock
->ops
->bind(sock
,
1528 fput_light(sock
->file
, fput_needed
);
1534 * Perform a listen. Basically, we allow the protocol to do anything
1535 * necessary for a listen, and if that works, we mark the socket as
1536 * ready for listening.
1539 SYSCALL_DEFINE2(listen
, int, fd
, int, backlog
)
1541 struct socket
*sock
;
1542 int err
, fput_needed
;
1545 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1547 somaxconn
= sock_net(sock
->sk
)->core
.sysctl_somaxconn
;
1548 if ((unsigned int)backlog
> somaxconn
)
1549 backlog
= somaxconn
;
1551 err
= security_socket_listen(sock
, backlog
);
1553 err
= sock
->ops
->listen(sock
, backlog
);
1555 fput_light(sock
->file
, fput_needed
);
1561 * For accept, we attempt to create a new socket, set up the link
1562 * with the client, wake up the client, then return the new
1563 * connected fd. We collect the address of the connector in kernel
1564 * space and move it to user at the very end. This is unclean because
1565 * we open the socket then return an error.
1567 * 1003.1g adds the ability to recvmsg() to query connection pending
1568 * status to recvmsg. We need to add that support in a way thats
1569 * clean when we restucture accept also.
1572 SYSCALL_DEFINE4(accept4
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1573 int __user
*, upeer_addrlen
, int, flags
)
1575 struct socket
*sock
, *newsock
;
1576 struct file
*newfile
;
1577 int err
, len
, newfd
, fput_needed
;
1578 struct sockaddr_storage address
;
1580 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1583 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1584 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1586 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1591 newsock
= sock_alloc();
1595 newsock
->type
= sock
->type
;
1596 newsock
->ops
= sock
->ops
;
1599 * We don't need try_module_get here, as the listening socket (sock)
1600 * has the protocol module (sock->ops->owner) held.
1602 __module_get(newsock
->ops
->owner
);
1604 newfd
= get_unused_fd_flags(flags
);
1605 if (unlikely(newfd
< 0)) {
1607 sock_release(newsock
);
1610 newfile
= sock_alloc_file(newsock
, flags
, sock
->sk
->sk_prot_creator
->name
);
1611 if (unlikely(IS_ERR(newfile
))) {
1612 err
= PTR_ERR(newfile
);
1613 put_unused_fd(newfd
);
1614 sock_release(newsock
);
1618 err
= security_socket_accept(sock
, newsock
);
1622 err
= sock
->ops
->accept(sock
, newsock
, sock
->file
->f_flags
);
1626 if (upeer_sockaddr
) {
1627 if (newsock
->ops
->getname(newsock
, (struct sockaddr
*)&address
,
1629 err
= -ECONNABORTED
;
1632 err
= move_addr_to_user(&address
,
1633 len
, upeer_sockaddr
, upeer_addrlen
);
1638 /* File flags are not inherited via accept() unlike another OSes. */
1640 fd_install(newfd
, newfile
);
1644 fput_light(sock
->file
, fput_needed
);
1649 put_unused_fd(newfd
);
1653 SYSCALL_DEFINE3(accept
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1654 int __user
*, upeer_addrlen
)
1656 return sys_accept4(fd
, upeer_sockaddr
, upeer_addrlen
, 0);
1660 * Attempt to connect to a socket with the server address. The address
1661 * is in user space so we verify it is OK and move it to kernel space.
1663 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1666 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1667 * other SEQPACKET protocols that take time to connect() as it doesn't
1668 * include the -EINPROGRESS status for such sockets.
1671 SYSCALL_DEFINE3(connect
, int, fd
, struct sockaddr __user
*, uservaddr
,
1674 struct socket
*sock
;
1675 struct sockaddr_storage address
;
1676 int err
, fput_needed
;
1678 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1681 err
= move_addr_to_kernel(uservaddr
, addrlen
, &address
);
1686 security_socket_connect(sock
, (struct sockaddr
*)&address
, addrlen
);
1690 err
= sock
->ops
->connect(sock
, (struct sockaddr
*)&address
, addrlen
,
1691 sock
->file
->f_flags
);
1693 fput_light(sock
->file
, fput_needed
);
1699 * Get the local address ('name') of a socket object. Move the obtained
1700 * name to user space.
1703 SYSCALL_DEFINE3(getsockname
, int, fd
, struct sockaddr __user
*, usockaddr
,
1704 int __user
*, usockaddr_len
)
1706 struct socket
*sock
;
1707 struct sockaddr_storage address
;
1708 int len
, err
, fput_needed
;
1710 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1714 err
= security_socket_getsockname(sock
);
1718 err
= sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
, 0);
1721 err
= move_addr_to_user(&address
, len
, usockaddr
, usockaddr_len
);
1724 fput_light(sock
->file
, fput_needed
);
1730 * Get the remote address ('name') of a socket object. Move the obtained
1731 * name to user space.
1734 SYSCALL_DEFINE3(getpeername
, int, fd
, struct sockaddr __user
*, usockaddr
,
1735 int __user
*, usockaddr_len
)
1737 struct socket
*sock
;
1738 struct sockaddr_storage address
;
1739 int len
, err
, fput_needed
;
1741 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1743 err
= security_socket_getpeername(sock
);
1745 fput_light(sock
->file
, fput_needed
);
1750 sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
,
1753 err
= move_addr_to_user(&address
, len
, usockaddr
,
1755 fput_light(sock
->file
, fput_needed
);
1761 * Send a datagram to a given address. We move the address into kernel
1762 * space and check the user space data area is readable before invoking
1766 SYSCALL_DEFINE6(sendto
, int, fd
, void __user
*, buff
, size_t, len
,
1767 unsigned int, flags
, struct sockaddr __user
*, addr
,
1770 struct socket
*sock
;
1771 struct sockaddr_storage address
;
1779 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1783 iov
.iov_base
= buff
;
1785 msg
.msg_name
= NULL
;
1788 msg
.msg_control
= NULL
;
1789 msg
.msg_controllen
= 0;
1790 msg
.msg_namelen
= 0;
1792 err
= move_addr_to_kernel(addr
, addr_len
, &address
);
1795 msg
.msg_name
= (struct sockaddr
*)&address
;
1796 msg
.msg_namelen
= addr_len
;
1798 if (sock
->file
->f_flags
& O_NONBLOCK
)
1799 flags
|= MSG_DONTWAIT
;
1800 msg
.msg_flags
= flags
;
1801 err
= sock_sendmsg(sock
, &msg
, len
);
1804 fput_light(sock
->file
, fput_needed
);
1810 * Send a datagram down a socket.
1813 SYSCALL_DEFINE4(send
, int, fd
, void __user
*, buff
, size_t, len
,
1814 unsigned int, flags
)
1816 return sys_sendto(fd
, buff
, len
, flags
, NULL
, 0);
1820 * Receive a frame from the socket and optionally record the address of the
1821 * sender. We verify the buffers are writable and if needed move the
1822 * sender address from kernel to user space.
1825 SYSCALL_DEFINE6(recvfrom
, int, fd
, void __user
*, ubuf
, size_t, size
,
1826 unsigned int, flags
, struct sockaddr __user
*, addr
,
1827 int __user
*, addr_len
)
1829 struct socket
*sock
;
1832 struct sockaddr_storage address
;
1838 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1842 msg
.msg_control
= NULL
;
1843 msg
.msg_controllen
= 0;
1847 iov
.iov_base
= ubuf
;
1848 msg
.msg_name
= (struct sockaddr
*)&address
;
1849 msg
.msg_namelen
= sizeof(address
);
1850 if (sock
->file
->f_flags
& O_NONBLOCK
)
1851 flags
|= MSG_DONTWAIT
;
1852 err
= sock_recvmsg(sock
, &msg
, size
, flags
);
1854 if (err
>= 0 && addr
!= NULL
) {
1855 err2
= move_addr_to_user(&address
,
1856 msg
.msg_namelen
, addr
, addr_len
);
1861 fput_light(sock
->file
, fput_needed
);
1867 * Receive a datagram from a socket.
1870 asmlinkage
long sys_recv(int fd
, void __user
*ubuf
, size_t size
,
1873 return sys_recvfrom(fd
, ubuf
, size
, flags
, NULL
, NULL
);
1877 * Set a socket option. Because we don't know the option lengths we have
1878 * to pass the user mode parameter for the protocols to sort out.
1881 SYSCALL_DEFINE5(setsockopt
, int, fd
, int, level
, int, optname
,
1882 char __user
*, optval
, int, optlen
)
1884 int err
, fput_needed
;
1885 struct socket
*sock
;
1890 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1892 err
= security_socket_setsockopt(sock
, level
, optname
);
1896 if (level
== SOL_SOCKET
)
1898 sock_setsockopt(sock
, level
, optname
, optval
,
1902 sock
->ops
->setsockopt(sock
, level
, optname
, optval
,
1905 fput_light(sock
->file
, fput_needed
);
1911 * Get a socket option. Because we don't know the option lengths we have
1912 * to pass a user mode parameter for the protocols to sort out.
1915 SYSCALL_DEFINE5(getsockopt
, int, fd
, int, level
, int, optname
,
1916 char __user
*, optval
, int __user
*, optlen
)
1918 int err
, fput_needed
;
1919 struct socket
*sock
;
1921 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1923 err
= security_socket_getsockopt(sock
, level
, optname
);
1927 if (level
== SOL_SOCKET
)
1929 sock_getsockopt(sock
, level
, optname
, optval
,
1933 sock
->ops
->getsockopt(sock
, level
, optname
, optval
,
1936 fput_light(sock
->file
, fput_needed
);
1942 * Shutdown a socket.
1945 SYSCALL_DEFINE2(shutdown
, int, fd
, int, how
)
1947 int err
, fput_needed
;
1948 struct socket
*sock
;
1950 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1952 err
= security_socket_shutdown(sock
, how
);
1954 err
= sock
->ops
->shutdown(sock
, how
);
1955 fput_light(sock
->file
, fput_needed
);
1960 /* A couple of helpful macros for getting the address of the 32/64 bit
1961 * fields which are the same type (int / unsigned) on our platforms.
1963 #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1964 #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1965 #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1967 struct used_address
{
1968 struct sockaddr_storage name
;
1969 unsigned int name_len
;
1972 static int __sys_sendmsg(struct socket
*sock
, struct msghdr __user
*msg
,
1973 struct msghdr
*msg_sys
, unsigned int flags
,
1974 struct used_address
*used_address
)
1976 struct compat_msghdr __user
*msg_compat
=
1977 (struct compat_msghdr __user
*)msg
;
1978 struct sockaddr_storage address
;
1979 struct iovec iovstack
[UIO_FASTIOV
], *iov
= iovstack
;
1980 unsigned char ctl
[sizeof(struct cmsghdr
) + 20]
1981 __attribute__ ((aligned(sizeof(__kernel_size_t
))));
1982 /* 20 is size of ipv6_pktinfo */
1983 unsigned char *ctl_buf
= ctl
;
1984 int err
, ctl_len
, total_len
;
1987 if (MSG_CMSG_COMPAT
& flags
) {
1988 if (get_compat_msghdr(msg_sys
, msg_compat
))
1990 } else if (copy_from_user(msg_sys
, msg
, sizeof(struct msghdr
)))
1993 if (msg_sys
->msg_iovlen
> UIO_FASTIOV
) {
1995 if (msg_sys
->msg_iovlen
> UIO_MAXIOV
)
1998 iov
= kmalloc(msg_sys
->msg_iovlen
* sizeof(struct iovec
),
2004 /* This will also move the address data into kernel space */
2005 if (MSG_CMSG_COMPAT
& flags
) {
2006 err
= verify_compat_iovec(msg_sys
, iov
, &address
, VERIFY_READ
);
2008 err
= verify_iovec(msg_sys
, iov
, &address
, VERIFY_READ
);
2015 if (msg_sys
->msg_controllen
> INT_MAX
)
2017 ctl_len
= msg_sys
->msg_controllen
;
2018 if ((MSG_CMSG_COMPAT
& flags
) && ctl_len
) {
2020 cmsghdr_from_user_compat_to_kern(msg_sys
, sock
->sk
, ctl
,
2024 ctl_buf
= msg_sys
->msg_control
;
2025 ctl_len
= msg_sys
->msg_controllen
;
2026 } else if (ctl_len
) {
2027 if (ctl_len
> sizeof(ctl
)) {
2028 ctl_buf
= sock_kmalloc(sock
->sk
, ctl_len
, GFP_KERNEL
);
2029 if (ctl_buf
== NULL
)
2034 * Careful! Before this, msg_sys->msg_control contains a user pointer.
2035 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
2036 * checking falls down on this.
2038 if (copy_from_user(ctl_buf
,
2039 (void __user __force
*)msg_sys
->msg_control
,
2042 msg_sys
->msg_control
= ctl_buf
;
2044 msg_sys
->msg_flags
= flags
;
2046 if (sock
->file
->f_flags
& O_NONBLOCK
)
2047 msg_sys
->msg_flags
|= MSG_DONTWAIT
;
2049 * If this is sendmmsg() and current destination address is same as
2050 * previously succeeded address, omit asking LSM's decision.
2051 * used_address->name_len is initialized to UINT_MAX so that the first
2052 * destination address never matches.
2054 if (used_address
&& msg_sys
->msg_name
&&
2055 used_address
->name_len
== msg_sys
->msg_namelen
&&
2056 !memcmp(&used_address
->name
, msg_sys
->msg_name
,
2057 used_address
->name_len
)) {
2058 err
= sock_sendmsg_nosec(sock
, msg_sys
, total_len
);
2061 err
= sock_sendmsg(sock
, msg_sys
, total_len
);
2063 * If this is sendmmsg() and sending to current destination address was
2064 * successful, remember it.
2066 if (used_address
&& err
>= 0) {
2067 used_address
->name_len
= msg_sys
->msg_namelen
;
2068 if (msg_sys
->msg_name
)
2069 memcpy(&used_address
->name
, msg_sys
->msg_name
,
2070 used_address
->name_len
);
2075 sock_kfree_s(sock
->sk
, ctl_buf
, ctl_len
);
2077 if (iov
!= iovstack
)
2084 * BSD sendmsg interface
2087 SYSCALL_DEFINE3(sendmsg
, int, fd
, struct msghdr __user
*, msg
, unsigned int, flags
)
2089 int fput_needed
, err
;
2090 struct msghdr msg_sys
;
2091 struct socket
*sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2096 err
= __sys_sendmsg(sock
, msg
, &msg_sys
, flags
, NULL
);
2098 fput_light(sock
->file
, fput_needed
);
2104 * Linux sendmmsg interface
2107 int __sys_sendmmsg(int fd
, struct mmsghdr __user
*mmsg
, unsigned int vlen
,
2110 int fput_needed
, err
, datagrams
;
2111 struct socket
*sock
;
2112 struct mmsghdr __user
*entry
;
2113 struct compat_mmsghdr __user
*compat_entry
;
2114 struct msghdr msg_sys
;
2115 struct used_address used_address
;
2117 if (vlen
> UIO_MAXIOV
)
2122 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2126 used_address
.name_len
= UINT_MAX
;
2128 compat_entry
= (struct compat_mmsghdr __user
*)mmsg
;
2131 while (datagrams
< vlen
) {
2132 if (MSG_CMSG_COMPAT
& flags
) {
2133 err
= __sys_sendmsg(sock
, (struct msghdr __user
*)compat_entry
,
2134 &msg_sys
, flags
, &used_address
);
2137 err
= __put_user(err
, &compat_entry
->msg_len
);
2140 err
= __sys_sendmsg(sock
, (struct msghdr __user
*)entry
,
2141 &msg_sys
, flags
, &used_address
);
2144 err
= put_user(err
, &entry
->msg_len
);
2153 fput_light(sock
->file
, fput_needed
);
2155 /* We only return an error if no datagrams were able to be sent */
2162 SYSCALL_DEFINE4(sendmmsg
, int, fd
, struct mmsghdr __user
*, mmsg
,
2163 unsigned int, vlen
, unsigned int, flags
)
2165 return __sys_sendmmsg(fd
, mmsg
, vlen
, flags
);
2168 static int __sys_recvmsg(struct socket
*sock
, struct msghdr __user
*msg
,
2169 struct msghdr
*msg_sys
, unsigned int flags
, int nosec
)
2171 struct compat_msghdr __user
*msg_compat
=
2172 (struct compat_msghdr __user
*)msg
;
2173 struct iovec iovstack
[UIO_FASTIOV
];
2174 struct iovec
*iov
= iovstack
;
2175 unsigned long cmsg_ptr
;
2176 int err
, total_len
, len
;
2178 /* kernel mode address */
2179 struct sockaddr_storage addr
;
2181 /* user mode address pointers */
2182 struct sockaddr __user
*uaddr
;
2183 int __user
*uaddr_len
;
2185 if (MSG_CMSG_COMPAT
& flags
) {
2186 if (get_compat_msghdr(msg_sys
, msg_compat
))
2188 } else if (copy_from_user(msg_sys
, msg
, sizeof(struct msghdr
)))
2191 if (msg_sys
->msg_iovlen
> UIO_FASTIOV
) {
2193 if (msg_sys
->msg_iovlen
> UIO_MAXIOV
)
2196 iov
= kmalloc(msg_sys
->msg_iovlen
* sizeof(struct iovec
),
2203 * Save the user-mode address (verify_iovec will change the
2204 * kernel msghdr to use the kernel address space)
2207 uaddr
= (__force
void __user
*)msg_sys
->msg_name
;
2208 uaddr_len
= COMPAT_NAMELEN(msg
);
2209 if (MSG_CMSG_COMPAT
& flags
) {
2210 err
= verify_compat_iovec(msg_sys
, iov
, &addr
, VERIFY_WRITE
);
2212 err
= verify_iovec(msg_sys
, iov
, &addr
, VERIFY_WRITE
);
2217 cmsg_ptr
= (unsigned long)msg_sys
->msg_control
;
2218 msg_sys
->msg_flags
= flags
& (MSG_CMSG_CLOEXEC
|MSG_CMSG_COMPAT
);
2220 if (sock
->file
->f_flags
& O_NONBLOCK
)
2221 flags
|= MSG_DONTWAIT
;
2222 err
= (nosec
? sock_recvmsg_nosec
: sock_recvmsg
)(sock
, msg_sys
,
2228 if (uaddr
!= NULL
) {
2229 err
= move_addr_to_user(&addr
,
2230 msg_sys
->msg_namelen
, uaddr
,
2235 err
= __put_user((msg_sys
->msg_flags
& ~MSG_CMSG_COMPAT
),
2239 if (MSG_CMSG_COMPAT
& flags
)
2240 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2241 &msg_compat
->msg_controllen
);
2243 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2244 &msg
->msg_controllen
);
2250 if (iov
!= iovstack
)
2257 * BSD recvmsg interface
2260 SYSCALL_DEFINE3(recvmsg
, int, fd
, struct msghdr __user
*, msg
,
2261 unsigned int, flags
)
2263 int fput_needed
, err
;
2264 struct msghdr msg_sys
;
2265 struct socket
*sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2270 err
= __sys_recvmsg(sock
, msg
, &msg_sys
, flags
, 0);
2272 fput_light(sock
->file
, fput_needed
);
2278 * Linux recvmmsg interface
2281 int __sys_recvmmsg(int fd
, struct mmsghdr __user
*mmsg
, unsigned int vlen
,
2282 unsigned int flags
, struct timespec
*timeout
)
2284 int fput_needed
, err
, datagrams
;
2285 struct socket
*sock
;
2286 struct mmsghdr __user
*entry
;
2287 struct compat_mmsghdr __user
*compat_entry
;
2288 struct msghdr msg_sys
;
2289 struct timespec end_time
;
2292 poll_select_set_timeout(&end_time
, timeout
->tv_sec
,
2298 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2302 err
= sock_error(sock
->sk
);
2307 compat_entry
= (struct compat_mmsghdr __user
*)mmsg
;
2309 while (datagrams
< vlen
) {
2311 * No need to ask LSM for more than the first datagram.
2313 if (MSG_CMSG_COMPAT
& flags
) {
2314 err
= __sys_recvmsg(sock
, (struct msghdr __user
*)compat_entry
,
2315 &msg_sys
, flags
& ~MSG_WAITFORONE
,
2319 err
= __put_user(err
, &compat_entry
->msg_len
);
2322 err
= __sys_recvmsg(sock
, (struct msghdr __user
*)entry
,
2323 &msg_sys
, flags
& ~MSG_WAITFORONE
,
2327 err
= put_user(err
, &entry
->msg_len
);
2335 /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
2336 if (flags
& MSG_WAITFORONE
)
2337 flags
|= MSG_DONTWAIT
;
2340 ktime_get_ts(timeout
);
2341 *timeout
= timespec_sub(end_time
, *timeout
);
2342 if (timeout
->tv_sec
< 0) {
2343 timeout
->tv_sec
= timeout
->tv_nsec
= 0;
2347 /* Timeout, return less than vlen datagrams */
2348 if (timeout
->tv_nsec
== 0 && timeout
->tv_sec
== 0)
2352 /* Out of band data, return right away */
2353 if (msg_sys
.msg_flags
& MSG_OOB
)
2358 fput_light(sock
->file
, fput_needed
);
2363 if (datagrams
!= 0) {
2365 * We may return less entries than requested (vlen) if the
2366 * sock is non block and there aren't enough datagrams...
2368 if (err
!= -EAGAIN
) {
2370 * ... or if recvmsg returns an error after we
2371 * received some datagrams, where we record the
2372 * error to return on the next call or if the
2373 * app asks about it using getsockopt(SO_ERROR).
2375 sock
->sk
->sk_err
= -err
;
2384 SYSCALL_DEFINE5(recvmmsg
, int, fd
, struct mmsghdr __user
*, mmsg
,
2385 unsigned int, vlen
, unsigned int, flags
,
2386 struct timespec __user
*, timeout
)
2389 struct timespec timeout_sys
;
2392 return __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, NULL
);
2394 if (copy_from_user(&timeout_sys
, timeout
, sizeof(timeout_sys
)))
2397 datagrams
= __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, &timeout_sys
);
2399 if (datagrams
> 0 &&
2400 copy_to_user(timeout
, &timeout_sys
, sizeof(timeout_sys
)))
2401 datagrams
= -EFAULT
;
2406 #ifdef __ARCH_WANT_SYS_SOCKETCALL
2407 /* Argument list sizes for sys_socketcall */
2408 #define AL(x) ((x) * sizeof(unsigned long))
2409 static const unsigned char nargs
[21] = {
2410 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
2411 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
2412 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
2419 * System call vectors.
2421 * Argument checking cleaned up. Saved 20% in size.
2422 * This function doesn't need to set the kernel lock because
2423 * it is set by the callees.
2426 SYSCALL_DEFINE2(socketcall
, int, call
, unsigned long __user
*, args
)
2429 unsigned long a0
, a1
;
2433 if (call
< 1 || call
> SYS_SENDMMSG
)
2437 if (len
> sizeof(a
))
2440 /* copy_from_user should be SMP safe. */
2441 if (copy_from_user(a
, args
, len
))
2444 audit_socketcall(nargs
[call
] / sizeof(unsigned long), a
);
2451 err
= sys_socket(a0
, a1
, a
[2]);
2454 err
= sys_bind(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2457 err
= sys_connect(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2460 err
= sys_listen(a0
, a1
);
2463 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2464 (int __user
*)a
[2], 0);
2466 case SYS_GETSOCKNAME
:
2468 sys_getsockname(a0
, (struct sockaddr __user
*)a1
,
2469 (int __user
*)a
[2]);
2471 case SYS_GETPEERNAME
:
2473 sys_getpeername(a0
, (struct sockaddr __user
*)a1
,
2474 (int __user
*)a
[2]);
2476 case SYS_SOCKETPAIR
:
2477 err
= sys_socketpair(a0
, a1
, a
[2], (int __user
*)a
[3]);
2480 err
= sys_send(a0
, (void __user
*)a1
, a
[2], a
[3]);
2483 err
= sys_sendto(a0
, (void __user
*)a1
, a
[2], a
[3],
2484 (struct sockaddr __user
*)a
[4], a
[5]);
2487 err
= sys_recv(a0
, (void __user
*)a1
, a
[2], a
[3]);
2490 err
= sys_recvfrom(a0
, (void __user
*)a1
, a
[2], a
[3],
2491 (struct sockaddr __user
*)a
[4],
2492 (int __user
*)a
[5]);
2495 err
= sys_shutdown(a0
, a1
);
2497 case SYS_SETSOCKOPT
:
2498 err
= sys_setsockopt(a0
, a1
, a
[2], (char __user
*)a
[3], a
[4]);
2500 case SYS_GETSOCKOPT
:
2502 sys_getsockopt(a0
, a1
, a
[2], (char __user
*)a
[3],
2503 (int __user
*)a
[4]);
2506 err
= sys_sendmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2509 err
= sys_sendmmsg(a0
, (struct mmsghdr __user
*)a1
, a
[2], a
[3]);
2512 err
= sys_recvmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2515 err
= sys_recvmmsg(a0
, (struct mmsghdr __user
*)a1
, a
[2], a
[3],
2516 (struct timespec __user
*)a
[4]);
2519 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2520 (int __user
*)a
[2], a
[3]);
2529 #endif /* __ARCH_WANT_SYS_SOCKETCALL */
2532 * sock_register - add a socket protocol handler
2533 * @ops: description of protocol
2535 * This function is called by a protocol handler that wants to
2536 * advertise its address family, and have it linked into the
2537 * socket interface. The value ops->family coresponds to the
2538 * socket system call protocol family.
2540 int sock_register(const struct net_proto_family
*ops
)
2544 if (ops
->family
>= NPROTO
) {
2545 printk(KERN_CRIT
"protocol %d >= NPROTO(%d)\n", ops
->family
,
2550 spin_lock(&net_family_lock
);
2551 if (rcu_dereference_protected(net_families
[ops
->family
],
2552 lockdep_is_held(&net_family_lock
)))
2555 rcu_assign_pointer(net_families
[ops
->family
], ops
);
2558 spin_unlock(&net_family_lock
);
2560 printk(KERN_INFO
"NET: Registered protocol family %d\n", ops
->family
);
2563 EXPORT_SYMBOL(sock_register
);
2566 * sock_unregister - remove a protocol handler
2567 * @family: protocol family to remove
2569 * This function is called by a protocol handler that wants to
2570 * remove its address family, and have it unlinked from the
2571 * new socket creation.
2573 * If protocol handler is a module, then it can use module reference
2574 * counts to protect against new references. If protocol handler is not
2575 * a module then it needs to provide its own protection in
2576 * the ops->create routine.
2578 void sock_unregister(int family
)
2580 BUG_ON(family
< 0 || family
>= NPROTO
);
2582 spin_lock(&net_family_lock
);
2583 RCU_INIT_POINTER(net_families
[family
], NULL
);
2584 spin_unlock(&net_family_lock
);
2588 printk(KERN_INFO
"NET: Unregistered protocol family %d\n", family
);
2590 EXPORT_SYMBOL(sock_unregister
);
2592 static int __init
sock_init(void)
2596 * Initialize the network sysctl infrastructure.
2598 err
= net_sysctl_init();
2603 * Initialize skbuff SLAB cache
2608 * Initialize the protocols module.
2613 err
= register_filesystem(&sock_fs_type
);
2616 sock_mnt
= kern_mount(&sock_fs_type
);
2617 if (IS_ERR(sock_mnt
)) {
2618 err
= PTR_ERR(sock_mnt
);
2622 /* The real protocol initialization is performed in later initcalls.
2625 #ifdef CONFIG_NETFILTER
2629 #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
2630 skb_timestamping_init();
2637 unregister_filesystem(&sock_fs_type
);
2642 core_initcall(sock_init
); /* early initcall */
2644 #ifdef CONFIG_PROC_FS
2645 void socket_seq_show(struct seq_file
*seq
)
2650 for_each_possible_cpu(cpu
)
2651 counter
+= per_cpu(sockets_in_use
, cpu
);
2653 /* It can be negative, by the way. 8) */
2657 seq_printf(seq
, "sockets: used %d\n", counter
);
2659 #endif /* CONFIG_PROC_FS */
2661 #ifdef CONFIG_COMPAT
2662 static int do_siocgstamp(struct net
*net
, struct socket
*sock
,
2663 unsigned int cmd
, void __user
*up
)
2665 mm_segment_t old_fs
= get_fs();
2670 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&ktv
);
2673 err
= compat_put_timeval(&ktv
, up
);
2678 static int do_siocgstampns(struct net
*net
, struct socket
*sock
,
2679 unsigned int cmd
, void __user
*up
)
2681 mm_segment_t old_fs
= get_fs();
2682 struct timespec kts
;
2686 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&kts
);
2689 err
= compat_put_timespec(&kts
, up
);
2694 static int dev_ifname32(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2696 struct ifreq __user
*uifr
;
2699 uifr
= compat_alloc_user_space(sizeof(struct ifreq
));
2700 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2703 err
= dev_ioctl(net
, SIOCGIFNAME
, uifr
);
2707 if (copy_in_user(uifr32
, uifr
, sizeof(struct compat_ifreq
)))
2713 static int dev_ifconf(struct net
*net
, struct compat_ifconf __user
*uifc32
)
2715 struct compat_ifconf ifc32
;
2717 struct ifconf __user
*uifc
;
2718 struct compat_ifreq __user
*ifr32
;
2719 struct ifreq __user
*ifr
;
2723 if (copy_from_user(&ifc32
, uifc32
, sizeof(struct compat_ifconf
)))
2726 memset(&ifc
, 0, sizeof(ifc
));
2727 if (ifc32
.ifcbuf
== 0) {
2731 uifc
= compat_alloc_user_space(sizeof(struct ifconf
));
2733 size_t len
= ((ifc32
.ifc_len
/ sizeof(struct compat_ifreq
)) + 1) *
2734 sizeof(struct ifreq
);
2735 uifc
= compat_alloc_user_space(sizeof(struct ifconf
) + len
);
2737 ifr
= ifc
.ifc_req
= (void __user
*)(uifc
+ 1);
2738 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2739 for (i
= 0; i
< ifc32
.ifc_len
; i
+= sizeof(struct compat_ifreq
)) {
2740 if (copy_in_user(ifr
, ifr32
, sizeof(struct compat_ifreq
)))
2746 if (copy_to_user(uifc
, &ifc
, sizeof(struct ifconf
)))
2749 err
= dev_ioctl(net
, SIOCGIFCONF
, uifc
);
2753 if (copy_from_user(&ifc
, uifc
, sizeof(struct ifconf
)))
2757 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2759 i
+ sizeof(struct compat_ifreq
) <= ifc32
.ifc_len
&& j
< ifc
.ifc_len
;
2760 i
+= sizeof(struct compat_ifreq
), j
+= sizeof(struct ifreq
)) {
2761 if (copy_in_user(ifr32
, ifr
, sizeof(struct compat_ifreq
)))
2767 if (ifc32
.ifcbuf
== 0) {
2768 /* Translate from 64-bit structure multiple to
2772 i
= ((i
/ sizeof(struct ifreq
)) * sizeof(struct compat_ifreq
));
2777 if (copy_to_user(uifc32
, &ifc32
, sizeof(struct compat_ifconf
)))
2783 static int ethtool_ioctl(struct net
*net
, struct compat_ifreq __user
*ifr32
)
2785 struct compat_ethtool_rxnfc __user
*compat_rxnfc
;
2786 bool convert_in
= false, convert_out
= false;
2787 size_t buf_size
= ALIGN(sizeof(struct ifreq
), 8);
2788 struct ethtool_rxnfc __user
*rxnfc
;
2789 struct ifreq __user
*ifr
;
2790 u32 rule_cnt
= 0, actual_rule_cnt
;
2795 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2798 compat_rxnfc
= compat_ptr(data
);
2800 if (get_user(ethcmd
, &compat_rxnfc
->cmd
))
2803 /* Most ethtool structures are defined without padding.
2804 * Unfortunately struct ethtool_rxnfc is an exception.
2809 case ETHTOOL_GRXCLSRLALL
:
2810 /* Buffer size is variable */
2811 if (get_user(rule_cnt
, &compat_rxnfc
->rule_cnt
))
2813 if (rule_cnt
> KMALLOC_MAX_SIZE
/ sizeof(u32
))
2815 buf_size
+= rule_cnt
* sizeof(u32
);
2817 case ETHTOOL_GRXRINGS
:
2818 case ETHTOOL_GRXCLSRLCNT
:
2819 case ETHTOOL_GRXCLSRULE
:
2820 case ETHTOOL_SRXCLSRLINS
:
2823 case ETHTOOL_SRXCLSRLDEL
:
2824 buf_size
+= sizeof(struct ethtool_rxnfc
);
2829 ifr
= compat_alloc_user_space(buf_size
);
2830 rxnfc
= (void __user
*)ifr
+ ALIGN(sizeof(struct ifreq
), 8);
2832 if (copy_in_user(&ifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2835 if (put_user(convert_in
? rxnfc
: compat_ptr(data
),
2836 &ifr
->ifr_ifru
.ifru_data
))
2840 /* We expect there to be holes between fs.m_ext and
2841 * fs.ring_cookie and at the end of fs, but nowhere else.
2843 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc
, fs
.m_ext
) +
2844 sizeof(compat_rxnfc
->fs
.m_ext
) !=
2845 offsetof(struct ethtool_rxnfc
, fs
.m_ext
) +
2846 sizeof(rxnfc
->fs
.m_ext
));
2848 offsetof(struct compat_ethtool_rxnfc
, fs
.location
) -
2849 offsetof(struct compat_ethtool_rxnfc
, fs
.ring_cookie
) !=
2850 offsetof(struct ethtool_rxnfc
, fs
.location
) -
2851 offsetof(struct ethtool_rxnfc
, fs
.ring_cookie
));
2853 if (copy_in_user(rxnfc
, compat_rxnfc
,
2854 (void __user
*)(&rxnfc
->fs
.m_ext
+ 1) -
2855 (void __user
*)rxnfc
) ||
2856 copy_in_user(&rxnfc
->fs
.ring_cookie
,
2857 &compat_rxnfc
->fs
.ring_cookie
,
2858 (void __user
*)(&rxnfc
->fs
.location
+ 1) -
2859 (void __user
*)&rxnfc
->fs
.ring_cookie
) ||
2860 copy_in_user(&rxnfc
->rule_cnt
, &compat_rxnfc
->rule_cnt
,
2861 sizeof(rxnfc
->rule_cnt
)))
2865 ret
= dev_ioctl(net
, SIOCETHTOOL
, ifr
);
2870 if (copy_in_user(compat_rxnfc
, rxnfc
,
2871 (const void __user
*)(&rxnfc
->fs
.m_ext
+ 1) -
2872 (const void __user
*)rxnfc
) ||
2873 copy_in_user(&compat_rxnfc
->fs
.ring_cookie
,
2874 &rxnfc
->fs
.ring_cookie
,
2875 (const void __user
*)(&rxnfc
->fs
.location
+ 1) -
2876 (const void __user
*)&rxnfc
->fs
.ring_cookie
) ||
2877 copy_in_user(&compat_rxnfc
->rule_cnt
, &rxnfc
->rule_cnt
,
2878 sizeof(rxnfc
->rule_cnt
)))
2881 if (ethcmd
== ETHTOOL_GRXCLSRLALL
) {
2882 /* As an optimisation, we only copy the actual
2883 * number of rules that the underlying
2884 * function returned. Since Mallory might
2885 * change the rule count in user memory, we
2886 * check that it is less than the rule count
2887 * originally given (as the user buffer size),
2888 * which has been range-checked.
2890 if (get_user(actual_rule_cnt
, &rxnfc
->rule_cnt
))
2892 if (actual_rule_cnt
< rule_cnt
)
2893 rule_cnt
= actual_rule_cnt
;
2894 if (copy_in_user(&compat_rxnfc
->rule_locs
[0],
2895 &rxnfc
->rule_locs
[0],
2896 rule_cnt
* sizeof(u32
)))
2904 static int compat_siocwandev(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2907 compat_uptr_t uptr32
;
2908 struct ifreq __user
*uifr
;
2910 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2911 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2914 if (get_user(uptr32
, &uifr32
->ifr_settings
.ifs_ifsu
))
2917 uptr
= compat_ptr(uptr32
);
2919 if (put_user(uptr
, &uifr
->ifr_settings
.ifs_ifsu
.raw_hdlc
))
2922 return dev_ioctl(net
, SIOCWANDEV
, uifr
);
2925 static int bond_ioctl(struct net
*net
, unsigned int cmd
,
2926 struct compat_ifreq __user
*ifr32
)
2929 struct ifreq __user
*uifr
;
2930 mm_segment_t old_fs
;
2936 case SIOCBONDENSLAVE
:
2937 case SIOCBONDRELEASE
:
2938 case SIOCBONDSETHWADDR
:
2939 case SIOCBONDCHANGEACTIVE
:
2940 if (copy_from_user(&kifr
, ifr32
, sizeof(struct compat_ifreq
)))
2945 err
= dev_ioctl(net
, cmd
,
2946 (struct ifreq __user __force
*) &kifr
);
2950 case SIOCBONDSLAVEINFOQUERY
:
2951 case SIOCBONDINFOQUERY
:
2952 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2953 if (copy_in_user(&uifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2956 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2959 datap
= compat_ptr(data
);
2960 if (put_user(datap
, &uifr
->ifr_ifru
.ifru_data
))
2963 return dev_ioctl(net
, cmd
, uifr
);
2965 return -ENOIOCTLCMD
;
2969 static int siocdevprivate_ioctl(struct net
*net
, unsigned int cmd
,
2970 struct compat_ifreq __user
*u_ifreq32
)
2972 struct ifreq __user
*u_ifreq64
;
2973 char tmp_buf
[IFNAMSIZ
];
2974 void __user
*data64
;
2977 if (copy_from_user(&tmp_buf
[0], &(u_ifreq32
->ifr_ifrn
.ifrn_name
[0]),
2980 if (__get_user(data32
, &u_ifreq32
->ifr_ifru
.ifru_data
))
2982 data64
= compat_ptr(data32
);
2984 u_ifreq64
= compat_alloc_user_space(sizeof(*u_ifreq64
));
2986 /* Don't check these user accesses, just let that get trapped
2987 * in the ioctl handler instead.
2989 if (copy_to_user(&u_ifreq64
->ifr_ifrn
.ifrn_name
[0], &tmp_buf
[0],
2992 if (__put_user(data64
, &u_ifreq64
->ifr_ifru
.ifru_data
))
2995 return dev_ioctl(net
, cmd
, u_ifreq64
);
2998 static int dev_ifsioc(struct net
*net
, struct socket
*sock
,
2999 unsigned int cmd
, struct compat_ifreq __user
*uifr32
)
3001 struct ifreq __user
*uifr
;
3004 uifr
= compat_alloc_user_space(sizeof(*uifr
));
3005 if (copy_in_user(uifr
, uifr32
, sizeof(*uifr32
)))
3008 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)uifr
);
3019 case SIOCGIFBRDADDR
:
3020 case SIOCGIFDSTADDR
:
3021 case SIOCGIFNETMASK
:
3026 if (copy_in_user(uifr32
, uifr
, sizeof(*uifr32
)))
3034 static int compat_sioc_ifmap(struct net
*net
, unsigned int cmd
,
3035 struct compat_ifreq __user
*uifr32
)
3038 struct compat_ifmap __user
*uifmap32
;
3039 mm_segment_t old_fs
;
3042 uifmap32
= &uifr32
->ifr_ifru
.ifru_map
;
3043 err
= copy_from_user(&ifr
, uifr32
, sizeof(ifr
.ifr_name
));
3044 err
|= __get_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
3045 err
|= __get_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
3046 err
|= __get_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
3047 err
|= __get_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
3048 err
|= __get_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
3049 err
|= __get_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
3055 err
= dev_ioctl(net
, cmd
, (void __user __force
*)&ifr
);
3058 if (cmd
== SIOCGIFMAP
&& !err
) {
3059 err
= copy_to_user(uifr32
, &ifr
, sizeof(ifr
.ifr_name
));
3060 err
|= __put_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
3061 err
|= __put_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
3062 err
|= __put_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
3063 err
|= __put_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
3064 err
|= __put_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
3065 err
|= __put_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
3072 static int compat_siocshwtstamp(struct net
*net
, struct compat_ifreq __user
*uifr32
)
3075 compat_uptr_t uptr32
;
3076 struct ifreq __user
*uifr
;
3078 uifr
= compat_alloc_user_space(sizeof(*uifr
));
3079 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
3082 if (get_user(uptr32
, &uifr32
->ifr_data
))
3085 uptr
= compat_ptr(uptr32
);
3087 if (put_user(uptr
, &uifr
->ifr_data
))
3090 return dev_ioctl(net
, SIOCSHWTSTAMP
, uifr
);
3095 struct sockaddr rt_dst
; /* target address */
3096 struct sockaddr rt_gateway
; /* gateway addr (RTF_GATEWAY) */
3097 struct sockaddr rt_genmask
; /* target network mask (IP) */
3098 unsigned short rt_flags
;
3101 unsigned char rt_tos
;
3102 unsigned char rt_class
;
3104 short rt_metric
; /* +1 for binary compatibility! */
3105 /* char * */ u32 rt_dev
; /* forcing the device at add */
3106 u32 rt_mtu
; /* per route MTU/Window */
3107 u32 rt_window
; /* Window clamping */
3108 unsigned short rt_irtt
; /* Initial RTT */
3111 struct in6_rtmsg32
{
3112 struct in6_addr rtmsg_dst
;
3113 struct in6_addr rtmsg_src
;
3114 struct in6_addr rtmsg_gateway
;
3124 static int routing_ioctl(struct net
*net
, struct socket
*sock
,
3125 unsigned int cmd
, void __user
*argp
)
3129 struct in6_rtmsg r6
;
3133 mm_segment_t old_fs
= get_fs();
3135 if (sock
&& sock
->sk
&& sock
->sk
->sk_family
== AF_INET6
) { /* ipv6 */
3136 struct in6_rtmsg32 __user
*ur6
= argp
;
3137 ret
= copy_from_user(&r6
.rtmsg_dst
, &(ur6
->rtmsg_dst
),
3138 3 * sizeof(struct in6_addr
));
3139 ret
|= __get_user(r6
.rtmsg_type
, &(ur6
->rtmsg_type
));
3140 ret
|= __get_user(r6
.rtmsg_dst_len
, &(ur6
->rtmsg_dst_len
));
3141 ret
|= __get_user(r6
.rtmsg_src_len
, &(ur6
->rtmsg_src_len
));
3142 ret
|= __get_user(r6
.rtmsg_metric
, &(ur6
->rtmsg_metric
));
3143 ret
|= __get_user(r6
.rtmsg_info
, &(ur6
->rtmsg_info
));
3144 ret
|= __get_user(r6
.rtmsg_flags
, &(ur6
->rtmsg_flags
));
3145 ret
|= __get_user(r6
.rtmsg_ifindex
, &(ur6
->rtmsg_ifindex
));
3149 struct rtentry32 __user
*ur4
= argp
;
3150 ret
= copy_from_user(&r4
.rt_dst
, &(ur4
->rt_dst
),
3151 3 * sizeof(struct sockaddr
));
3152 ret
|= __get_user(r4
.rt_flags
, &(ur4
->rt_flags
));
3153 ret
|= __get_user(r4
.rt_metric
, &(ur4
->rt_metric
));
3154 ret
|= __get_user(r4
.rt_mtu
, &(ur4
->rt_mtu
));
3155 ret
|= __get_user(r4
.rt_window
, &(ur4
->rt_window
));
3156 ret
|= __get_user(r4
.rt_irtt
, &(ur4
->rt_irtt
));
3157 ret
|= __get_user(rtdev
, &(ur4
->rt_dev
));
3159 ret
|= copy_from_user(devname
, compat_ptr(rtdev
), 15);
3160 r4
.rt_dev
= (char __user __force
*)devname
;
3174 ret
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long) r
);
3181 /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
3182 * for some operations; this forces use of the newer bridge-utils that
3183 * use compatible ioctls
3185 static int old_bridge_ioctl(compat_ulong_t __user
*argp
)
3189 if (get_user(tmp
, argp
))
3191 if (tmp
== BRCTL_GET_VERSION
)
3192 return BRCTL_VERSION
+ 1;
3196 static int compat_sock_ioctl_trans(struct file
*file
, struct socket
*sock
,
3197 unsigned int cmd
, unsigned long arg
)
3199 void __user
*argp
= compat_ptr(arg
);
3200 struct sock
*sk
= sock
->sk
;
3201 struct net
*net
= sock_net(sk
);
3203 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15))
3204 return siocdevprivate_ioctl(net
, cmd
, argp
);
3209 return old_bridge_ioctl(argp
);
3211 return dev_ifname32(net
, argp
);
3213 return dev_ifconf(net
, argp
);
3215 return ethtool_ioctl(net
, argp
);
3217 return compat_siocwandev(net
, argp
);
3220 return compat_sioc_ifmap(net
, cmd
, argp
);
3221 case SIOCBONDENSLAVE
:
3222 case SIOCBONDRELEASE
:
3223 case SIOCBONDSETHWADDR
:
3224 case SIOCBONDSLAVEINFOQUERY
:
3225 case SIOCBONDINFOQUERY
:
3226 case SIOCBONDCHANGEACTIVE
:
3227 return bond_ioctl(net
, cmd
, argp
);
3230 return routing_ioctl(net
, sock
, cmd
, argp
);
3232 return do_siocgstamp(net
, sock
, cmd
, argp
);
3234 return do_siocgstampns(net
, sock
, cmd
, argp
);
3236 return compat_siocshwtstamp(net
, argp
);
3248 return sock_ioctl(file
, cmd
, arg
);
3265 case SIOCSIFHWBROADCAST
:
3267 case SIOCGIFBRDADDR
:
3268 case SIOCSIFBRDADDR
:
3269 case SIOCGIFDSTADDR
:
3270 case SIOCSIFDSTADDR
:
3271 case SIOCGIFNETMASK
:
3272 case SIOCSIFNETMASK
:
3283 return dev_ifsioc(net
, sock
, cmd
, argp
);
3289 return sock_do_ioctl(net
, sock
, cmd
, arg
);
3292 return -ENOIOCTLCMD
;
3295 static long compat_sock_ioctl(struct file
*file
, unsigned int cmd
,
3298 struct socket
*sock
= file
->private_data
;
3299 int ret
= -ENOIOCTLCMD
;
3306 if (sock
->ops
->compat_ioctl
)
3307 ret
= sock
->ops
->compat_ioctl(sock
, cmd
, arg
);
3309 if (ret
== -ENOIOCTLCMD
&&
3310 (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
))
3311 ret
= compat_wext_handle_ioctl(net
, cmd
, arg
);
3313 if (ret
== -ENOIOCTLCMD
)
3314 ret
= compat_sock_ioctl_trans(file
, sock
, cmd
, arg
);
3320 int kernel_bind(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
)
3322 return sock
->ops
->bind(sock
, addr
, addrlen
);
3324 EXPORT_SYMBOL(kernel_bind
);
3326 int kernel_listen(struct socket
*sock
, int backlog
)
3328 return sock
->ops
->listen(sock
, backlog
);
3330 EXPORT_SYMBOL(kernel_listen
);
3332 int kernel_accept(struct socket
*sock
, struct socket
**newsock
, int flags
)
3334 struct sock
*sk
= sock
->sk
;
3337 err
= sock_create_lite(sk
->sk_family
, sk
->sk_type
, sk
->sk_protocol
,
3342 err
= sock
->ops
->accept(sock
, *newsock
, flags
);
3344 sock_release(*newsock
);
3349 (*newsock
)->ops
= sock
->ops
;
3350 __module_get((*newsock
)->ops
->owner
);
3355 EXPORT_SYMBOL(kernel_accept
);
3357 int kernel_connect(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
,
3360 return sock
->ops
->connect(sock
, addr
, addrlen
, flags
);
3362 EXPORT_SYMBOL(kernel_connect
);
3364 int kernel_getsockname(struct socket
*sock
, struct sockaddr
*addr
,
3367 return sock
->ops
->getname(sock
, addr
, addrlen
, 0);
3369 EXPORT_SYMBOL(kernel_getsockname
);
3371 int kernel_getpeername(struct socket
*sock
, struct sockaddr
*addr
,
3374 return sock
->ops
->getname(sock
, addr
, addrlen
, 1);
3376 EXPORT_SYMBOL(kernel_getpeername
);
3378 int kernel_getsockopt(struct socket
*sock
, int level
, int optname
,
3379 char *optval
, int *optlen
)
3381 mm_segment_t oldfs
= get_fs();
3382 char __user
*uoptval
;
3383 int __user
*uoptlen
;
3386 uoptval
= (char __user __force
*) optval
;
3387 uoptlen
= (int __user __force
*) optlen
;
3390 if (level
== SOL_SOCKET
)
3391 err
= sock_getsockopt(sock
, level
, optname
, uoptval
, uoptlen
);
3393 err
= sock
->ops
->getsockopt(sock
, level
, optname
, uoptval
,
3398 EXPORT_SYMBOL(kernel_getsockopt
);
3400 int kernel_setsockopt(struct socket
*sock
, int level
, int optname
,
3401 char *optval
, unsigned int optlen
)
3403 mm_segment_t oldfs
= get_fs();
3404 char __user
*uoptval
;
3407 uoptval
= (char __user __force
*) optval
;
3410 if (level
== SOL_SOCKET
)
3411 err
= sock_setsockopt(sock
, level
, optname
, uoptval
, optlen
);
3413 err
= sock
->ops
->setsockopt(sock
, level
, optname
, uoptval
,
3418 EXPORT_SYMBOL(kernel_setsockopt
);
3420 int kernel_sendpage(struct socket
*sock
, struct page
*page
, int offset
,
3421 size_t size
, int flags
)
3423 if (sock
->ops
->sendpage
)
3424 return sock
->ops
->sendpage(sock
, page
, offset
, size
, flags
);
3426 return sock_no_sendpage(sock
, page
, offset
, size
, flags
);
3428 EXPORT_SYMBOL(kernel_sendpage
);
3430 int kernel_sock_ioctl(struct socket
*sock
, int cmd
, unsigned long arg
)
3432 mm_segment_t oldfs
= get_fs();
3436 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
3441 EXPORT_SYMBOL(kernel_sock_ioctl
);
3443 int kernel_sock_shutdown(struct socket
*sock
, enum sock_shutdown_cmd how
)
3445 return sock
->ops
->shutdown(sock
, how
);
3447 EXPORT_SYMBOL(kernel_sock_shutdown
);