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>
107 #include <net/ll_poll.h>
109 #ifdef CONFIG_NET_LL_RX_POLL
110 unsigned int sysctl_net_ll_poll __read_mostly
;
113 static int sock_no_open(struct inode
*irrelevant
, struct file
*dontcare
);
114 static ssize_t
sock_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
115 unsigned long nr_segs
, loff_t pos
);
116 static ssize_t
sock_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
117 unsigned long nr_segs
, loff_t pos
);
118 static int sock_mmap(struct file
*file
, struct vm_area_struct
*vma
);
120 static int sock_close(struct inode
*inode
, struct file
*file
);
121 static unsigned int sock_poll(struct file
*file
,
122 struct poll_table_struct
*wait
);
123 static long sock_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
);
125 static long compat_sock_ioctl(struct file
*file
,
126 unsigned int cmd
, unsigned long arg
);
128 static int sock_fasync(int fd
, struct file
*filp
, int on
);
129 static ssize_t
sock_sendpage(struct file
*file
, struct page
*page
,
130 int offset
, size_t size
, loff_t
*ppos
, int more
);
131 static ssize_t
sock_splice_read(struct file
*file
, loff_t
*ppos
,
132 struct pipe_inode_info
*pipe
, size_t len
,
136 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
137 * in the operation structures but are done directly via the socketcall() multiplexor.
140 static const struct file_operations socket_file_ops
= {
141 .owner
= THIS_MODULE
,
143 .aio_read
= sock_aio_read
,
144 .aio_write
= sock_aio_write
,
146 .unlocked_ioctl
= sock_ioctl
,
148 .compat_ioctl
= compat_sock_ioctl
,
151 .open
= sock_no_open
, /* special open code to disallow open via /proc */
152 .release
= sock_close
,
153 .fasync
= sock_fasync
,
154 .sendpage
= sock_sendpage
,
155 .splice_write
= generic_splice_sendpage
,
156 .splice_read
= sock_splice_read
,
160 * The protocol list. Each protocol is registered in here.
163 static DEFINE_SPINLOCK(net_family_lock
);
164 static const struct net_proto_family __rcu
*net_families
[NPROTO
] __read_mostly
;
167 * Statistics counters of the socket lists
170 static DEFINE_PER_CPU(int, sockets_in_use
);
174 * Move socket addresses back and forth across the kernel/user
175 * divide and look after the messy bits.
179 * move_addr_to_kernel - copy a socket address into kernel space
180 * @uaddr: Address in user space
181 * @kaddr: Address in kernel space
182 * @ulen: Length in user space
184 * The address is copied into kernel space. If the provided address is
185 * too long an error code of -EINVAL is returned. If the copy gives
186 * invalid addresses -EFAULT is returned. On a success 0 is returned.
189 int move_addr_to_kernel(void __user
*uaddr
, int ulen
, struct sockaddr_storage
*kaddr
)
191 if (ulen
< 0 || ulen
> sizeof(struct sockaddr_storage
))
195 if (copy_from_user(kaddr
, uaddr
, ulen
))
197 return audit_sockaddr(ulen
, kaddr
);
201 * move_addr_to_user - copy an address to user space
202 * @kaddr: kernel space address
203 * @klen: length of address in kernel
204 * @uaddr: user space address
205 * @ulen: pointer to user length field
207 * The value pointed to by ulen on entry is the buffer length available.
208 * This is overwritten with the buffer space used. -EINVAL is returned
209 * if an overlong buffer is specified or a negative buffer size. -EFAULT
210 * is returned if either the buffer or the length field are not
212 * After copying the data up to the limit the user specifies, the true
213 * length of the data is written over the length limit the user
214 * specified. Zero is returned for a success.
217 static int move_addr_to_user(struct sockaddr_storage
*kaddr
, int klen
,
218 void __user
*uaddr
, int __user
*ulen
)
223 err
= get_user(len
, ulen
);
228 if (len
< 0 || len
> sizeof(struct sockaddr_storage
))
231 if (audit_sockaddr(klen
, kaddr
))
233 if (copy_to_user(uaddr
, kaddr
, len
))
237 * "fromlen shall refer to the value before truncation.."
240 return __put_user(klen
, ulen
);
243 static struct kmem_cache
*sock_inode_cachep __read_mostly
;
245 static struct inode
*sock_alloc_inode(struct super_block
*sb
)
247 struct socket_alloc
*ei
;
248 struct socket_wq
*wq
;
250 ei
= kmem_cache_alloc(sock_inode_cachep
, GFP_KERNEL
);
253 wq
= kmalloc(sizeof(*wq
), GFP_KERNEL
);
255 kmem_cache_free(sock_inode_cachep
, ei
);
258 init_waitqueue_head(&wq
->wait
);
259 wq
->fasync_list
= NULL
;
260 RCU_INIT_POINTER(ei
->socket
.wq
, wq
);
262 ei
->socket
.state
= SS_UNCONNECTED
;
263 ei
->socket
.flags
= 0;
264 ei
->socket
.ops
= NULL
;
265 ei
->socket
.sk
= NULL
;
266 ei
->socket
.file
= NULL
;
268 return &ei
->vfs_inode
;
271 static void sock_destroy_inode(struct inode
*inode
)
273 struct socket_alloc
*ei
;
274 struct socket_wq
*wq
;
276 ei
= container_of(inode
, struct socket_alloc
, vfs_inode
);
277 wq
= rcu_dereference_protected(ei
->socket
.wq
, 1);
279 kmem_cache_free(sock_inode_cachep
, ei
);
282 static void init_once(void *foo
)
284 struct socket_alloc
*ei
= (struct socket_alloc
*)foo
;
286 inode_init_once(&ei
->vfs_inode
);
289 static int init_inodecache(void)
291 sock_inode_cachep
= kmem_cache_create("sock_inode_cache",
292 sizeof(struct socket_alloc
),
294 (SLAB_HWCACHE_ALIGN
|
295 SLAB_RECLAIM_ACCOUNT
|
298 if (sock_inode_cachep
== NULL
)
303 static const struct super_operations sockfs_ops
= {
304 .alloc_inode
= sock_alloc_inode
,
305 .destroy_inode
= sock_destroy_inode
,
306 .statfs
= simple_statfs
,
310 * sockfs_dname() is called from d_path().
312 static char *sockfs_dname(struct dentry
*dentry
, char *buffer
, int buflen
)
314 return dynamic_dname(dentry
, buffer
, buflen
, "socket:[%lu]",
315 dentry
->d_inode
->i_ino
);
318 static const struct dentry_operations sockfs_dentry_operations
= {
319 .d_dname
= sockfs_dname
,
322 static struct dentry
*sockfs_mount(struct file_system_type
*fs_type
,
323 int flags
, const char *dev_name
, void *data
)
325 return mount_pseudo(fs_type
, "socket:", &sockfs_ops
,
326 &sockfs_dentry_operations
, SOCKFS_MAGIC
);
329 static struct vfsmount
*sock_mnt __read_mostly
;
331 static struct file_system_type sock_fs_type
= {
333 .mount
= sockfs_mount
,
334 .kill_sb
= kill_anon_super
,
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 struct file
*sock_alloc_file(struct socket
*sock
, int flags
, const char *dname
)
356 struct qstr name
= { .name
= "" };
362 name
.len
= strlen(name
.name
);
363 } else if (sock
->sk
) {
364 name
.name
= sock
->sk
->sk_prot_creator
->name
;
365 name
.len
= strlen(name
.name
);
367 path
.dentry
= d_alloc_pseudo(sock_mnt
->mnt_sb
, &name
);
368 if (unlikely(!path
.dentry
))
369 return ERR_PTR(-ENOMEM
);
370 path
.mnt
= mntget(sock_mnt
);
372 d_instantiate(path
.dentry
, SOCK_INODE(sock
));
373 SOCK_INODE(sock
)->i_fop
= &socket_file_ops
;
375 file
= alloc_file(&path
, FMODE_READ
| FMODE_WRITE
,
377 if (unlikely(IS_ERR(file
))) {
378 /* drop dentry, keep inode */
379 ihold(path
.dentry
->d_inode
);
385 file
->f_flags
= O_RDWR
| (flags
& O_NONBLOCK
);
386 file
->private_data
= sock
;
389 EXPORT_SYMBOL(sock_alloc_file
);
391 static int sock_map_fd(struct socket
*sock
, int flags
)
393 struct file
*newfile
;
394 int fd
= get_unused_fd_flags(flags
);
395 if (unlikely(fd
< 0))
398 newfile
= sock_alloc_file(sock
, flags
, NULL
);
399 if (likely(!IS_ERR(newfile
))) {
400 fd_install(fd
, newfile
);
405 return PTR_ERR(newfile
);
408 struct socket
*sock_from_file(struct file
*file
, int *err
)
410 if (file
->f_op
== &socket_file_ops
)
411 return file
->private_data
; /* set in sock_map_fd */
416 EXPORT_SYMBOL(sock_from_file
);
419 * sockfd_lookup - Go from a file number to its socket slot
421 * @err: pointer to an error code return
423 * The file handle passed in is locked and the socket it is bound
424 * too is returned. If an error occurs the err pointer is overwritten
425 * with a negative errno code and NULL is returned. The function checks
426 * for both invalid handles and passing a handle which is not a socket.
428 * On a success the socket object pointer is returned.
431 struct socket
*sockfd_lookup(int fd
, int *err
)
442 sock
= sock_from_file(file
, err
);
447 EXPORT_SYMBOL(sockfd_lookup
);
449 static struct socket
*sockfd_lookup_light(int fd
, int *err
, int *fput_needed
)
455 file
= fget_light(fd
, fput_needed
);
457 sock
= sock_from_file(file
, err
);
460 fput_light(file
, *fput_needed
);
465 #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname"
466 #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX)
467 #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1)
468 static ssize_t
sockfs_getxattr(struct dentry
*dentry
,
469 const char *name
, void *value
, size_t size
)
471 const char *proto_name
;
476 if (!strncmp(name
, XATTR_NAME_SOCKPROTONAME
, XATTR_NAME_SOCKPROTONAME_LEN
)) {
477 proto_name
= dentry
->d_name
.name
;
478 proto_size
= strlen(proto_name
);
482 if (proto_size
+ 1 > size
)
485 strncpy(value
, proto_name
, proto_size
+ 1);
487 error
= proto_size
+ 1;
494 static ssize_t
sockfs_listxattr(struct dentry
*dentry
, char *buffer
,
500 len
= security_inode_listsecurity(dentry
->d_inode
, buffer
, size
);
510 len
= (XATTR_NAME_SOCKPROTONAME_LEN
+ 1);
515 memcpy(buffer
, XATTR_NAME_SOCKPROTONAME
, len
);
522 static const struct inode_operations sockfs_inode_ops
= {
523 .getxattr
= sockfs_getxattr
,
524 .listxattr
= sockfs_listxattr
,
528 * sock_alloc - allocate a socket
530 * Allocate a new inode and socket object. The two are bound together
531 * and initialised. The socket is then returned. If we are out of inodes
535 static struct socket
*sock_alloc(void)
540 inode
= new_inode_pseudo(sock_mnt
->mnt_sb
);
544 sock
= SOCKET_I(inode
);
546 kmemcheck_annotate_bitfield(sock
, type
);
547 inode
->i_ino
= get_next_ino();
548 inode
->i_mode
= S_IFSOCK
| S_IRWXUGO
;
549 inode
->i_uid
= current_fsuid();
550 inode
->i_gid
= current_fsgid();
551 inode
->i_op
= &sockfs_inode_ops
;
553 this_cpu_add(sockets_in_use
, 1);
558 * In theory you can't get an open on this inode, but /proc provides
559 * a back door. Remember to keep it shut otherwise you'll let the
560 * creepy crawlies in.
563 static int sock_no_open(struct inode
*irrelevant
, struct file
*dontcare
)
568 const struct file_operations bad_sock_fops
= {
569 .owner
= THIS_MODULE
,
570 .open
= sock_no_open
,
571 .llseek
= noop_llseek
,
575 * sock_release - close a socket
576 * @sock: socket to close
578 * The socket is released from the protocol stack if it has a release
579 * callback, and the inode is then released if the socket is bound to
580 * an inode not a file.
583 void sock_release(struct socket
*sock
)
586 struct module
*owner
= sock
->ops
->owner
;
588 sock
->ops
->release(sock
);
593 if (rcu_dereference_protected(sock
->wq
, 1)->fasync_list
)
594 printk(KERN_ERR
"sock_release: fasync list not empty!\n");
596 if (test_bit(SOCK_EXTERNALLY_ALLOCATED
, &sock
->flags
))
599 this_cpu_sub(sockets_in_use
, 1);
601 iput(SOCK_INODE(sock
));
606 EXPORT_SYMBOL(sock_release
);
608 void sock_tx_timestamp(struct sock
*sk
, __u8
*tx_flags
)
611 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_HARDWARE
))
612 *tx_flags
|= SKBTX_HW_TSTAMP
;
613 if (sock_flag(sk
, SOCK_TIMESTAMPING_TX_SOFTWARE
))
614 *tx_flags
|= SKBTX_SW_TSTAMP
;
615 if (sock_flag(sk
, SOCK_WIFI_STATUS
))
616 *tx_flags
|= SKBTX_WIFI_STATUS
;
618 EXPORT_SYMBOL(sock_tx_timestamp
);
620 static inline int __sock_sendmsg_nosec(struct kiocb
*iocb
, struct socket
*sock
,
621 struct msghdr
*msg
, size_t size
)
623 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
630 return sock
->ops
->sendmsg(iocb
, sock
, msg
, size
);
633 static inline int __sock_sendmsg(struct kiocb
*iocb
, struct socket
*sock
,
634 struct msghdr
*msg
, size_t size
)
636 int err
= security_socket_sendmsg(sock
, msg
, size
);
638 return err
?: __sock_sendmsg_nosec(iocb
, sock
, msg
, size
);
641 int sock_sendmsg(struct socket
*sock
, struct msghdr
*msg
, size_t size
)
644 struct sock_iocb siocb
;
647 init_sync_kiocb(&iocb
, NULL
);
648 iocb
.private = &siocb
;
649 ret
= __sock_sendmsg(&iocb
, sock
, msg
, size
);
650 if (-EIOCBQUEUED
== ret
)
651 ret
= wait_on_sync_kiocb(&iocb
);
654 EXPORT_SYMBOL(sock_sendmsg
);
656 static int sock_sendmsg_nosec(struct socket
*sock
, struct msghdr
*msg
, size_t size
)
659 struct sock_iocb siocb
;
662 init_sync_kiocb(&iocb
, NULL
);
663 iocb
.private = &siocb
;
664 ret
= __sock_sendmsg_nosec(&iocb
, sock
, msg
, size
);
665 if (-EIOCBQUEUED
== ret
)
666 ret
= wait_on_sync_kiocb(&iocb
);
670 int kernel_sendmsg(struct socket
*sock
, struct msghdr
*msg
,
671 struct kvec
*vec
, size_t num
, size_t size
)
673 mm_segment_t oldfs
= get_fs();
678 * the following is safe, since for compiler definitions of kvec and
679 * iovec are identical, yielding the same in-core layout and alignment
681 msg
->msg_iov
= (struct iovec
*)vec
;
682 msg
->msg_iovlen
= num
;
683 result
= sock_sendmsg(sock
, msg
, size
);
687 EXPORT_SYMBOL(kernel_sendmsg
);
690 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
692 void __sock_recv_timestamp(struct msghdr
*msg
, struct sock
*sk
,
695 int need_software_tstamp
= sock_flag(sk
, SOCK_RCVTSTAMP
);
696 struct timespec ts
[3];
698 struct skb_shared_hwtstamps
*shhwtstamps
=
701 /* Race occurred between timestamp enabling and packet
702 receiving. Fill in the current time for now. */
703 if (need_software_tstamp
&& skb
->tstamp
.tv64
== 0)
704 __net_timestamp(skb
);
706 if (need_software_tstamp
) {
707 if (!sock_flag(sk
, SOCK_RCVTSTAMPNS
)) {
709 skb_get_timestamp(skb
, &tv
);
710 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMP
,
713 skb_get_timestampns(skb
, &ts
[0]);
714 put_cmsg(msg
, SOL_SOCKET
, SCM_TIMESTAMPNS
,
715 sizeof(ts
[0]), &ts
[0]);
720 memset(ts
, 0, sizeof(ts
));
721 if (sock_flag(sk
, SOCK_TIMESTAMPING_SOFTWARE
) &&
722 ktime_to_timespec_cond(skb
->tstamp
, ts
+ 0))
725 if (sock_flag(sk
, SOCK_TIMESTAMPING_SYS_HARDWARE
) &&
726 ktime_to_timespec_cond(shhwtstamps
->syststamp
, ts
+ 1))
728 if (sock_flag(sk
, SOCK_TIMESTAMPING_RAW_HARDWARE
) &&
729 ktime_to_timespec_cond(shhwtstamps
->hwtstamp
, ts
+ 2))
733 put_cmsg(msg
, SOL_SOCKET
,
734 SCM_TIMESTAMPING
, sizeof(ts
), &ts
);
736 EXPORT_SYMBOL_GPL(__sock_recv_timestamp
);
738 void __sock_recv_wifi_status(struct msghdr
*msg
, struct sock
*sk
,
743 if (!sock_flag(sk
, SOCK_WIFI_STATUS
))
745 if (!skb
->wifi_acked_valid
)
748 ack
= skb
->wifi_acked
;
750 put_cmsg(msg
, SOL_SOCKET
, SCM_WIFI_STATUS
, sizeof(ack
), &ack
);
752 EXPORT_SYMBOL_GPL(__sock_recv_wifi_status
);
754 static inline void sock_recv_drops(struct msghdr
*msg
, struct sock
*sk
,
757 if (sock_flag(sk
, SOCK_RXQ_OVFL
) && skb
&& skb
->dropcount
)
758 put_cmsg(msg
, SOL_SOCKET
, SO_RXQ_OVFL
,
759 sizeof(__u32
), &skb
->dropcount
);
762 void __sock_recv_ts_and_drops(struct msghdr
*msg
, struct sock
*sk
,
765 sock_recv_timestamp(msg
, sk
, skb
);
766 sock_recv_drops(msg
, sk
, skb
);
768 EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops
);
770 static inline int __sock_recvmsg_nosec(struct kiocb
*iocb
, struct socket
*sock
,
771 struct msghdr
*msg
, size_t size
, int flags
)
773 struct sock_iocb
*si
= kiocb_to_siocb(iocb
);
781 return sock
->ops
->recvmsg(iocb
, sock
, msg
, size
, flags
);
784 static inline int __sock_recvmsg(struct kiocb
*iocb
, struct socket
*sock
,
785 struct msghdr
*msg
, size_t size
, int flags
)
787 int err
= security_socket_recvmsg(sock
, msg
, size
, flags
);
789 return err
?: __sock_recvmsg_nosec(iocb
, sock
, msg
, size
, flags
);
792 int sock_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
793 size_t size
, int flags
)
796 struct sock_iocb siocb
;
799 init_sync_kiocb(&iocb
, NULL
);
800 iocb
.private = &siocb
;
801 ret
= __sock_recvmsg(&iocb
, sock
, msg
, size
, flags
);
802 if (-EIOCBQUEUED
== ret
)
803 ret
= wait_on_sync_kiocb(&iocb
);
806 EXPORT_SYMBOL(sock_recvmsg
);
808 static int sock_recvmsg_nosec(struct socket
*sock
, struct msghdr
*msg
,
809 size_t size
, int flags
)
812 struct sock_iocb siocb
;
815 init_sync_kiocb(&iocb
, NULL
);
816 iocb
.private = &siocb
;
817 ret
= __sock_recvmsg_nosec(&iocb
, sock
, msg
, size
, flags
);
818 if (-EIOCBQUEUED
== ret
)
819 ret
= wait_on_sync_kiocb(&iocb
);
824 * kernel_recvmsg - Receive a message from a socket (kernel space)
825 * @sock: The socket to receive the message from
826 * @msg: Received message
827 * @vec: Input s/g array for message data
828 * @num: Size of input s/g array
829 * @size: Number of bytes to read
830 * @flags: Message flags (MSG_DONTWAIT, etc...)
832 * On return the msg structure contains the scatter/gather array passed in the
833 * vec argument. The array is modified so that it consists of the unfilled
834 * portion of the original array.
836 * The returned value is the total number of bytes received, or an error.
838 int kernel_recvmsg(struct socket
*sock
, struct msghdr
*msg
,
839 struct kvec
*vec
, size_t num
, size_t size
, int flags
)
841 mm_segment_t oldfs
= get_fs();
846 * the following is safe, since for compiler definitions of kvec and
847 * iovec are identical, yielding the same in-core layout and alignment
849 msg
->msg_iov
= (struct iovec
*)vec
, msg
->msg_iovlen
= num
;
850 result
= sock_recvmsg(sock
, msg
, size
, flags
);
854 EXPORT_SYMBOL(kernel_recvmsg
);
856 static void sock_aio_dtor(struct kiocb
*iocb
)
858 kfree(iocb
->private);
861 static ssize_t
sock_sendpage(struct file
*file
, struct page
*page
,
862 int offset
, size_t size
, loff_t
*ppos
, int more
)
867 sock
= file
->private_data
;
869 flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
870 /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */
873 return kernel_sendpage(sock
, page
, offset
, size
, flags
);
876 static ssize_t
sock_splice_read(struct file
*file
, loff_t
*ppos
,
877 struct pipe_inode_info
*pipe
, size_t len
,
880 struct socket
*sock
= file
->private_data
;
882 if (unlikely(!sock
->ops
->splice_read
))
885 return sock
->ops
->splice_read(sock
, ppos
, pipe
, len
, flags
);
888 static struct sock_iocb
*alloc_sock_iocb(struct kiocb
*iocb
,
889 struct sock_iocb
*siocb
)
891 if (!is_sync_kiocb(iocb
)) {
892 siocb
= kmalloc(sizeof(*siocb
), GFP_KERNEL
);
895 iocb
->ki_dtor
= sock_aio_dtor
;
899 iocb
->private = siocb
;
903 static ssize_t
do_sock_read(struct msghdr
*msg
, struct kiocb
*iocb
,
904 struct file
*file
, const struct iovec
*iov
,
905 unsigned long nr_segs
)
907 struct socket
*sock
= file
->private_data
;
911 for (i
= 0; i
< nr_segs
; i
++)
912 size
+= iov
[i
].iov_len
;
914 msg
->msg_name
= NULL
;
915 msg
->msg_namelen
= 0;
916 msg
->msg_control
= NULL
;
917 msg
->msg_controllen
= 0;
918 msg
->msg_iov
= (struct iovec
*)iov
;
919 msg
->msg_iovlen
= nr_segs
;
920 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
922 return __sock_recvmsg(iocb
, sock
, msg
, size
, msg
->msg_flags
);
925 static ssize_t
sock_aio_read(struct kiocb
*iocb
, const struct iovec
*iov
,
926 unsigned long nr_segs
, loff_t pos
)
928 struct sock_iocb siocb
, *x
;
933 if (iocb
->ki_left
== 0) /* Match SYS5 behaviour */
937 x
= alloc_sock_iocb(iocb
, &siocb
);
940 return do_sock_read(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
943 static ssize_t
do_sock_write(struct msghdr
*msg
, struct kiocb
*iocb
,
944 struct file
*file
, const struct iovec
*iov
,
945 unsigned long nr_segs
)
947 struct socket
*sock
= file
->private_data
;
951 for (i
= 0; i
< nr_segs
; i
++)
952 size
+= iov
[i
].iov_len
;
954 msg
->msg_name
= NULL
;
955 msg
->msg_namelen
= 0;
956 msg
->msg_control
= NULL
;
957 msg
->msg_controllen
= 0;
958 msg
->msg_iov
= (struct iovec
*)iov
;
959 msg
->msg_iovlen
= nr_segs
;
960 msg
->msg_flags
= (file
->f_flags
& O_NONBLOCK
) ? MSG_DONTWAIT
: 0;
961 if (sock
->type
== SOCK_SEQPACKET
)
962 msg
->msg_flags
|= MSG_EOR
;
964 return __sock_sendmsg(iocb
, sock
, msg
, size
);
967 static ssize_t
sock_aio_write(struct kiocb
*iocb
, const struct iovec
*iov
,
968 unsigned long nr_segs
, loff_t pos
)
970 struct sock_iocb siocb
, *x
;
975 x
= alloc_sock_iocb(iocb
, &siocb
);
979 return do_sock_write(&x
->async_msg
, iocb
, iocb
->ki_filp
, iov
, nr_segs
);
983 * Atomic setting of ioctl hooks to avoid race
984 * with module unload.
987 static DEFINE_MUTEX(br_ioctl_mutex
);
988 static int (*br_ioctl_hook
) (struct net
*, unsigned int cmd
, void __user
*arg
);
990 void brioctl_set(int (*hook
) (struct net
*, unsigned int, void __user
*))
992 mutex_lock(&br_ioctl_mutex
);
993 br_ioctl_hook
= hook
;
994 mutex_unlock(&br_ioctl_mutex
);
996 EXPORT_SYMBOL(brioctl_set
);
998 static DEFINE_MUTEX(vlan_ioctl_mutex
);
999 static int (*vlan_ioctl_hook
) (struct net
*, void __user
*arg
);
1001 void vlan_ioctl_set(int (*hook
) (struct net
*, void __user
*))
1003 mutex_lock(&vlan_ioctl_mutex
);
1004 vlan_ioctl_hook
= hook
;
1005 mutex_unlock(&vlan_ioctl_mutex
);
1007 EXPORT_SYMBOL(vlan_ioctl_set
);
1009 static DEFINE_MUTEX(dlci_ioctl_mutex
);
1010 static int (*dlci_ioctl_hook
) (unsigned int, void __user
*);
1012 void dlci_ioctl_set(int (*hook
) (unsigned int, void __user
*))
1014 mutex_lock(&dlci_ioctl_mutex
);
1015 dlci_ioctl_hook
= hook
;
1016 mutex_unlock(&dlci_ioctl_mutex
);
1018 EXPORT_SYMBOL(dlci_ioctl_set
);
1020 static long sock_do_ioctl(struct net
*net
, struct socket
*sock
,
1021 unsigned int cmd
, unsigned long arg
)
1024 void __user
*argp
= (void __user
*)arg
;
1026 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
1029 * If this ioctl is unknown try to hand it down
1030 * to the NIC driver.
1032 if (err
== -ENOIOCTLCMD
)
1033 err
= dev_ioctl(net
, cmd
, argp
);
1039 * With an ioctl, arg may well be a user mode pointer, but we don't know
1040 * what to do with it - that's up to the protocol still.
1043 static long sock_ioctl(struct file
*file
, unsigned cmd
, unsigned long arg
)
1045 struct socket
*sock
;
1047 void __user
*argp
= (void __user
*)arg
;
1051 sock
= file
->private_data
;
1054 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15)) {
1055 err
= dev_ioctl(net
, cmd
, argp
);
1057 #ifdef CONFIG_WEXT_CORE
1058 if (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
) {
1059 err
= dev_ioctl(net
, cmd
, argp
);
1066 if (get_user(pid
, (int __user
*)argp
))
1068 err
= f_setown(sock
->file
, pid
, 1);
1072 err
= put_user(f_getown(sock
->file
),
1073 (int __user
*)argp
);
1081 request_module("bridge");
1083 mutex_lock(&br_ioctl_mutex
);
1085 err
= br_ioctl_hook(net
, cmd
, argp
);
1086 mutex_unlock(&br_ioctl_mutex
);
1091 if (!vlan_ioctl_hook
)
1092 request_module("8021q");
1094 mutex_lock(&vlan_ioctl_mutex
);
1095 if (vlan_ioctl_hook
)
1096 err
= vlan_ioctl_hook(net
, argp
);
1097 mutex_unlock(&vlan_ioctl_mutex
);
1102 if (!dlci_ioctl_hook
)
1103 request_module("dlci");
1105 mutex_lock(&dlci_ioctl_mutex
);
1106 if (dlci_ioctl_hook
)
1107 err
= dlci_ioctl_hook(cmd
, argp
);
1108 mutex_unlock(&dlci_ioctl_mutex
);
1111 err
= sock_do_ioctl(net
, sock
, cmd
, arg
);
1117 int sock_create_lite(int family
, int type
, int protocol
, struct socket
**res
)
1120 struct socket
*sock
= NULL
;
1122 err
= security_socket_create(family
, type
, protocol
, 1);
1126 sock
= sock_alloc();
1133 err
= security_socket_post_create(sock
, family
, type
, protocol
, 1);
1145 EXPORT_SYMBOL(sock_create_lite
);
1147 /* No kernel lock held - perfect */
1148 static unsigned int sock_poll(struct file
*file
, poll_table
*wait
)
1150 struct socket
*sock
;
1153 * We can't return errors to poll, so it's either yes or no.
1155 sock
= file
->private_data
;
1156 return sock
->ops
->poll(file
, sock
, wait
);
1159 static int sock_mmap(struct file
*file
, struct vm_area_struct
*vma
)
1161 struct socket
*sock
= file
->private_data
;
1163 return sock
->ops
->mmap(file
, sock
, vma
);
1166 static int sock_close(struct inode
*inode
, struct file
*filp
)
1168 sock_release(SOCKET_I(inode
));
1173 * Update the socket async list
1175 * Fasync_list locking strategy.
1177 * 1. fasync_list is modified only under process context socket lock
1178 * i.e. under semaphore.
1179 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
1180 * or under socket lock
1183 static int sock_fasync(int fd
, struct file
*filp
, int on
)
1185 struct socket
*sock
= filp
->private_data
;
1186 struct sock
*sk
= sock
->sk
;
1187 struct socket_wq
*wq
;
1193 wq
= rcu_dereference_protected(sock
->wq
, sock_owned_by_user(sk
));
1194 fasync_helper(fd
, filp
, on
, &wq
->fasync_list
);
1196 if (!wq
->fasync_list
)
1197 sock_reset_flag(sk
, SOCK_FASYNC
);
1199 sock_set_flag(sk
, SOCK_FASYNC
);
1205 /* This function may be called only under socket lock or callback_lock or rcu_lock */
1207 int sock_wake_async(struct socket
*sock
, int how
, int band
)
1209 struct socket_wq
*wq
;
1214 wq
= rcu_dereference(sock
->wq
);
1215 if (!wq
|| !wq
->fasync_list
) {
1220 case SOCK_WAKE_WAITD
:
1221 if (test_bit(SOCK_ASYNC_WAITDATA
, &sock
->flags
))
1224 case SOCK_WAKE_SPACE
:
1225 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE
, &sock
->flags
))
1230 kill_fasync(&wq
->fasync_list
, SIGIO
, band
);
1233 kill_fasync(&wq
->fasync_list
, SIGURG
, band
);
1238 EXPORT_SYMBOL(sock_wake_async
);
1240 int __sock_create(struct net
*net
, int family
, int type
, int protocol
,
1241 struct socket
**res
, int kern
)
1244 struct socket
*sock
;
1245 const struct net_proto_family
*pf
;
1248 * Check protocol is in range
1250 if (family
< 0 || family
>= NPROTO
)
1251 return -EAFNOSUPPORT
;
1252 if (type
< 0 || type
>= SOCK_MAX
)
1257 This uglymoron is moved from INET layer to here to avoid
1258 deadlock in module load.
1260 if (family
== PF_INET
&& type
== SOCK_PACKET
) {
1264 printk(KERN_INFO
"%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1270 err
= security_socket_create(family
, type
, protocol
, kern
);
1275 * Allocate the socket and allow the family to set things up. if
1276 * the protocol is 0, the family is instructed to select an appropriate
1279 sock
= sock_alloc();
1281 net_warn_ratelimited("socket: no more sockets\n");
1282 return -ENFILE
; /* Not exactly a match, but its the
1283 closest posix thing */
1288 #ifdef CONFIG_MODULES
1289 /* Attempt to load a protocol module if the find failed.
1291 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
1292 * requested real, full-featured networking support upon configuration.
1293 * Otherwise module support will break!
1295 if (rcu_access_pointer(net_families
[family
]) == NULL
)
1296 request_module("net-pf-%d", family
);
1300 pf
= rcu_dereference(net_families
[family
]);
1301 err
= -EAFNOSUPPORT
;
1306 * We will call the ->create function, that possibly is in a loadable
1307 * module, so we have to bump that loadable module refcnt first.
1309 if (!try_module_get(pf
->owner
))
1312 /* Now protected by module ref count */
1315 err
= pf
->create(net
, sock
, protocol
, kern
);
1317 goto out_module_put
;
1320 * Now to bump the refcnt of the [loadable] module that owns this
1321 * socket at sock_release time we decrement its refcnt.
1323 if (!try_module_get(sock
->ops
->owner
))
1324 goto out_module_busy
;
1327 * Now that we're done with the ->create function, the [loadable]
1328 * module can have its refcnt decremented
1330 module_put(pf
->owner
);
1331 err
= security_socket_post_create(sock
, family
, type
, protocol
, kern
);
1333 goto out_sock_release
;
1339 err
= -EAFNOSUPPORT
;
1342 module_put(pf
->owner
);
1349 goto out_sock_release
;
1351 EXPORT_SYMBOL(__sock_create
);
1353 int sock_create(int family
, int type
, int protocol
, struct socket
**res
)
1355 return __sock_create(current
->nsproxy
->net_ns
, family
, type
, protocol
, res
, 0);
1357 EXPORT_SYMBOL(sock_create
);
1359 int sock_create_kern(int family
, int type
, int protocol
, struct socket
**res
)
1361 return __sock_create(&init_net
, family
, type
, protocol
, res
, 1);
1363 EXPORT_SYMBOL(sock_create_kern
);
1365 SYSCALL_DEFINE3(socket
, int, family
, int, type
, int, protocol
)
1368 struct socket
*sock
;
1371 /* Check the SOCK_* constants for consistency. */
1372 BUILD_BUG_ON(SOCK_CLOEXEC
!= O_CLOEXEC
);
1373 BUILD_BUG_ON((SOCK_MAX
| SOCK_TYPE_MASK
) != SOCK_TYPE_MASK
);
1374 BUILD_BUG_ON(SOCK_CLOEXEC
& SOCK_TYPE_MASK
);
1375 BUILD_BUG_ON(SOCK_NONBLOCK
& SOCK_TYPE_MASK
);
1377 flags
= type
& ~SOCK_TYPE_MASK
;
1378 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1380 type
&= SOCK_TYPE_MASK
;
1382 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1383 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1385 retval
= sock_create(family
, type
, protocol
, &sock
);
1389 retval
= sock_map_fd(sock
, flags
& (O_CLOEXEC
| O_NONBLOCK
));
1394 /* It may be already another descriptor 8) Not kernel problem. */
1403 * Create a pair of connected sockets.
1406 SYSCALL_DEFINE4(socketpair
, int, family
, int, type
, int, protocol
,
1407 int __user
*, usockvec
)
1409 struct socket
*sock1
, *sock2
;
1411 struct file
*newfile1
, *newfile2
;
1414 flags
= type
& ~SOCK_TYPE_MASK
;
1415 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1417 type
&= SOCK_TYPE_MASK
;
1419 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1420 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1423 * Obtain the first socket and check if the underlying protocol
1424 * supports the socketpair call.
1427 err
= sock_create(family
, type
, protocol
, &sock1
);
1431 err
= sock_create(family
, type
, protocol
, &sock2
);
1435 err
= sock1
->ops
->socketpair(sock1
, sock2
);
1437 goto out_release_both
;
1439 fd1
= get_unused_fd_flags(flags
);
1440 if (unlikely(fd1
< 0)) {
1442 goto out_release_both
;
1444 fd2
= get_unused_fd_flags(flags
);
1445 if (unlikely(fd2
< 0)) {
1448 goto out_release_both
;
1451 newfile1
= sock_alloc_file(sock1
, flags
, NULL
);
1452 if (unlikely(IS_ERR(newfile1
))) {
1453 err
= PTR_ERR(newfile1
);
1456 goto out_release_both
;
1459 newfile2
= sock_alloc_file(sock2
, flags
, NULL
);
1460 if (IS_ERR(newfile2
)) {
1461 err
= PTR_ERR(newfile2
);
1465 sock_release(sock2
);
1469 audit_fd_pair(fd1
, fd2
);
1470 fd_install(fd1
, newfile1
);
1471 fd_install(fd2
, newfile2
);
1472 /* fd1 and fd2 may be already another descriptors.
1473 * Not kernel problem.
1476 err
= put_user(fd1
, &usockvec
[0]);
1478 err
= put_user(fd2
, &usockvec
[1]);
1487 sock_release(sock2
);
1489 sock_release(sock1
);
1495 * Bind a name to a socket. Nothing much to do here since it's
1496 * the protocol's responsibility to handle the local address.
1498 * We move the socket address to kernel space before we call
1499 * the protocol layer (having also checked the address is ok).
1502 SYSCALL_DEFINE3(bind
, int, fd
, struct sockaddr __user
*, umyaddr
, int, addrlen
)
1504 struct socket
*sock
;
1505 struct sockaddr_storage address
;
1506 int err
, fput_needed
;
1508 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1510 err
= move_addr_to_kernel(umyaddr
, addrlen
, &address
);
1512 err
= security_socket_bind(sock
,
1513 (struct sockaddr
*)&address
,
1516 err
= sock
->ops
->bind(sock
,
1520 fput_light(sock
->file
, fput_needed
);
1526 * Perform a listen. Basically, we allow the protocol to do anything
1527 * necessary for a listen, and if that works, we mark the socket as
1528 * ready for listening.
1531 SYSCALL_DEFINE2(listen
, int, fd
, int, backlog
)
1533 struct socket
*sock
;
1534 int err
, fput_needed
;
1537 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1539 somaxconn
= sock_net(sock
->sk
)->core
.sysctl_somaxconn
;
1540 if ((unsigned int)backlog
> somaxconn
)
1541 backlog
= somaxconn
;
1543 err
= security_socket_listen(sock
, backlog
);
1545 err
= sock
->ops
->listen(sock
, backlog
);
1547 fput_light(sock
->file
, fput_needed
);
1553 * For accept, we attempt to create a new socket, set up the link
1554 * with the client, wake up the client, then return the new
1555 * connected fd. We collect the address of the connector in kernel
1556 * space and move it to user at the very end. This is unclean because
1557 * we open the socket then return an error.
1559 * 1003.1g adds the ability to recvmsg() to query connection pending
1560 * status to recvmsg. We need to add that support in a way thats
1561 * clean when we restucture accept also.
1564 SYSCALL_DEFINE4(accept4
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1565 int __user
*, upeer_addrlen
, int, flags
)
1567 struct socket
*sock
, *newsock
;
1568 struct file
*newfile
;
1569 int err
, len
, newfd
, fput_needed
;
1570 struct sockaddr_storage address
;
1572 if (flags
& ~(SOCK_CLOEXEC
| SOCK_NONBLOCK
))
1575 if (SOCK_NONBLOCK
!= O_NONBLOCK
&& (flags
& SOCK_NONBLOCK
))
1576 flags
= (flags
& ~SOCK_NONBLOCK
) | O_NONBLOCK
;
1578 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1583 newsock
= sock_alloc();
1587 newsock
->type
= sock
->type
;
1588 newsock
->ops
= sock
->ops
;
1591 * We don't need try_module_get here, as the listening socket (sock)
1592 * has the protocol module (sock->ops->owner) held.
1594 __module_get(newsock
->ops
->owner
);
1596 newfd
= get_unused_fd_flags(flags
);
1597 if (unlikely(newfd
< 0)) {
1599 sock_release(newsock
);
1602 newfile
= sock_alloc_file(newsock
, flags
, sock
->sk
->sk_prot_creator
->name
);
1603 if (unlikely(IS_ERR(newfile
))) {
1604 err
= PTR_ERR(newfile
);
1605 put_unused_fd(newfd
);
1606 sock_release(newsock
);
1610 err
= security_socket_accept(sock
, newsock
);
1614 err
= sock
->ops
->accept(sock
, newsock
, sock
->file
->f_flags
);
1618 if (upeer_sockaddr
) {
1619 if (newsock
->ops
->getname(newsock
, (struct sockaddr
*)&address
,
1621 err
= -ECONNABORTED
;
1624 err
= move_addr_to_user(&address
,
1625 len
, upeer_sockaddr
, upeer_addrlen
);
1630 /* File flags are not inherited via accept() unlike another OSes. */
1632 fd_install(newfd
, newfile
);
1636 fput_light(sock
->file
, fput_needed
);
1641 put_unused_fd(newfd
);
1645 SYSCALL_DEFINE3(accept
, int, fd
, struct sockaddr __user
*, upeer_sockaddr
,
1646 int __user
*, upeer_addrlen
)
1648 return sys_accept4(fd
, upeer_sockaddr
, upeer_addrlen
, 0);
1652 * Attempt to connect to a socket with the server address. The address
1653 * is in user space so we verify it is OK and move it to kernel space.
1655 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1658 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1659 * other SEQPACKET protocols that take time to connect() as it doesn't
1660 * include the -EINPROGRESS status for such sockets.
1663 SYSCALL_DEFINE3(connect
, int, fd
, struct sockaddr __user
*, uservaddr
,
1666 struct socket
*sock
;
1667 struct sockaddr_storage address
;
1668 int err
, fput_needed
;
1670 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1673 err
= move_addr_to_kernel(uservaddr
, addrlen
, &address
);
1678 security_socket_connect(sock
, (struct sockaddr
*)&address
, addrlen
);
1682 err
= sock
->ops
->connect(sock
, (struct sockaddr
*)&address
, addrlen
,
1683 sock
->file
->f_flags
);
1685 fput_light(sock
->file
, fput_needed
);
1691 * Get the local address ('name') of a socket object. Move the obtained
1692 * name to user space.
1695 SYSCALL_DEFINE3(getsockname
, int, fd
, struct sockaddr __user
*, usockaddr
,
1696 int __user
*, usockaddr_len
)
1698 struct socket
*sock
;
1699 struct sockaddr_storage address
;
1700 int len
, err
, fput_needed
;
1702 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1706 err
= security_socket_getsockname(sock
);
1710 err
= sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
, 0);
1713 err
= move_addr_to_user(&address
, len
, usockaddr
, usockaddr_len
);
1716 fput_light(sock
->file
, fput_needed
);
1722 * Get the remote address ('name') of a socket object. Move the obtained
1723 * name to user space.
1726 SYSCALL_DEFINE3(getpeername
, int, fd
, struct sockaddr __user
*, usockaddr
,
1727 int __user
*, usockaddr_len
)
1729 struct socket
*sock
;
1730 struct sockaddr_storage address
;
1731 int len
, err
, fput_needed
;
1733 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1735 err
= security_socket_getpeername(sock
);
1737 fput_light(sock
->file
, fput_needed
);
1742 sock
->ops
->getname(sock
, (struct sockaddr
*)&address
, &len
,
1745 err
= move_addr_to_user(&address
, len
, usockaddr
,
1747 fput_light(sock
->file
, fput_needed
);
1753 * Send a datagram to a given address. We move the address into kernel
1754 * space and check the user space data area is readable before invoking
1758 SYSCALL_DEFINE6(sendto
, int, fd
, void __user
*, buff
, size_t, len
,
1759 unsigned int, flags
, struct sockaddr __user
*, addr
,
1762 struct socket
*sock
;
1763 struct sockaddr_storage address
;
1771 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1775 iov
.iov_base
= buff
;
1777 msg
.msg_name
= NULL
;
1780 msg
.msg_control
= NULL
;
1781 msg
.msg_controllen
= 0;
1782 msg
.msg_namelen
= 0;
1784 err
= move_addr_to_kernel(addr
, addr_len
, &address
);
1787 msg
.msg_name
= (struct sockaddr
*)&address
;
1788 msg
.msg_namelen
= addr_len
;
1790 if (sock
->file
->f_flags
& O_NONBLOCK
)
1791 flags
|= MSG_DONTWAIT
;
1792 msg
.msg_flags
= flags
;
1793 err
= sock_sendmsg(sock
, &msg
, len
);
1796 fput_light(sock
->file
, fput_needed
);
1802 * Send a datagram down a socket.
1805 SYSCALL_DEFINE4(send
, int, fd
, void __user
*, buff
, size_t, len
,
1806 unsigned int, flags
)
1808 return sys_sendto(fd
, buff
, len
, flags
, NULL
, 0);
1812 * Receive a frame from the socket and optionally record the address of the
1813 * sender. We verify the buffers are writable and if needed move the
1814 * sender address from kernel to user space.
1817 SYSCALL_DEFINE6(recvfrom
, int, fd
, void __user
*, ubuf
, size_t, size
,
1818 unsigned int, flags
, struct sockaddr __user
*, addr
,
1819 int __user
*, addr_len
)
1821 struct socket
*sock
;
1824 struct sockaddr_storage address
;
1830 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1834 msg
.msg_control
= NULL
;
1835 msg
.msg_controllen
= 0;
1839 iov
.iov_base
= ubuf
;
1840 msg
.msg_name
= (struct sockaddr
*)&address
;
1841 msg
.msg_namelen
= sizeof(address
);
1842 if (sock
->file
->f_flags
& O_NONBLOCK
)
1843 flags
|= MSG_DONTWAIT
;
1844 err
= sock_recvmsg(sock
, &msg
, size
, flags
);
1846 if (err
>= 0 && addr
!= NULL
) {
1847 err2
= move_addr_to_user(&address
,
1848 msg
.msg_namelen
, addr
, addr_len
);
1853 fput_light(sock
->file
, fput_needed
);
1859 * Receive a datagram from a socket.
1862 asmlinkage
long sys_recv(int fd
, void __user
*ubuf
, size_t size
,
1865 return sys_recvfrom(fd
, ubuf
, size
, flags
, NULL
, NULL
);
1869 * Set a socket option. Because we don't know the option lengths we have
1870 * to pass the user mode parameter for the protocols to sort out.
1873 SYSCALL_DEFINE5(setsockopt
, int, fd
, int, level
, int, optname
,
1874 char __user
*, optval
, int, optlen
)
1876 int err
, fput_needed
;
1877 struct socket
*sock
;
1882 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1884 err
= security_socket_setsockopt(sock
, level
, optname
);
1888 if (level
== SOL_SOCKET
)
1890 sock_setsockopt(sock
, level
, optname
, optval
,
1894 sock
->ops
->setsockopt(sock
, level
, optname
, optval
,
1897 fput_light(sock
->file
, fput_needed
);
1903 * Get a socket option. Because we don't know the option lengths we have
1904 * to pass a user mode parameter for the protocols to sort out.
1907 SYSCALL_DEFINE5(getsockopt
, int, fd
, int, level
, int, optname
,
1908 char __user
*, optval
, int __user
*, optlen
)
1910 int err
, fput_needed
;
1911 struct socket
*sock
;
1913 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1915 err
= security_socket_getsockopt(sock
, level
, optname
);
1919 if (level
== SOL_SOCKET
)
1921 sock_getsockopt(sock
, level
, optname
, optval
,
1925 sock
->ops
->getsockopt(sock
, level
, optname
, optval
,
1928 fput_light(sock
->file
, fput_needed
);
1934 * Shutdown a socket.
1937 SYSCALL_DEFINE2(shutdown
, int, fd
, int, how
)
1939 int err
, fput_needed
;
1940 struct socket
*sock
;
1942 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
1944 err
= security_socket_shutdown(sock
, how
);
1946 err
= sock
->ops
->shutdown(sock
, how
);
1947 fput_light(sock
->file
, fput_needed
);
1952 /* A couple of helpful macros for getting the address of the 32/64 bit
1953 * fields which are the same type (int / unsigned) on our platforms.
1955 #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1956 #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1957 #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1959 struct used_address
{
1960 struct sockaddr_storage name
;
1961 unsigned int name_len
;
1964 static int ___sys_sendmsg(struct socket
*sock
, struct msghdr __user
*msg
,
1965 struct msghdr
*msg_sys
, unsigned int flags
,
1966 struct used_address
*used_address
)
1968 struct compat_msghdr __user
*msg_compat
=
1969 (struct compat_msghdr __user
*)msg
;
1970 struct sockaddr_storage address
;
1971 struct iovec iovstack
[UIO_FASTIOV
], *iov
= iovstack
;
1972 unsigned char ctl
[sizeof(struct cmsghdr
) + 20]
1973 __attribute__ ((aligned(sizeof(__kernel_size_t
))));
1974 /* 20 is size of ipv6_pktinfo */
1975 unsigned char *ctl_buf
= ctl
;
1976 int err
, ctl_len
, total_len
;
1979 if (MSG_CMSG_COMPAT
& flags
) {
1980 if (get_compat_msghdr(msg_sys
, msg_compat
))
1982 } else if (copy_from_user(msg_sys
, msg
, sizeof(struct msghdr
)))
1985 if (msg_sys
->msg_iovlen
> UIO_FASTIOV
) {
1987 if (msg_sys
->msg_iovlen
> UIO_MAXIOV
)
1990 iov
= kmalloc(msg_sys
->msg_iovlen
* sizeof(struct iovec
),
1996 /* This will also move the address data into kernel space */
1997 if (MSG_CMSG_COMPAT
& flags
) {
1998 err
= verify_compat_iovec(msg_sys
, iov
, &address
, VERIFY_READ
);
2000 err
= verify_iovec(msg_sys
, iov
, &address
, VERIFY_READ
);
2007 if (msg_sys
->msg_controllen
> INT_MAX
)
2009 ctl_len
= msg_sys
->msg_controllen
;
2010 if ((MSG_CMSG_COMPAT
& flags
) && ctl_len
) {
2012 cmsghdr_from_user_compat_to_kern(msg_sys
, sock
->sk
, ctl
,
2016 ctl_buf
= msg_sys
->msg_control
;
2017 ctl_len
= msg_sys
->msg_controllen
;
2018 } else if (ctl_len
) {
2019 if (ctl_len
> sizeof(ctl
)) {
2020 ctl_buf
= sock_kmalloc(sock
->sk
, ctl_len
, GFP_KERNEL
);
2021 if (ctl_buf
== NULL
)
2026 * Careful! Before this, msg_sys->msg_control contains a user pointer.
2027 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
2028 * checking falls down on this.
2030 if (copy_from_user(ctl_buf
,
2031 (void __user __force
*)msg_sys
->msg_control
,
2034 msg_sys
->msg_control
= ctl_buf
;
2036 msg_sys
->msg_flags
= flags
;
2038 if (sock
->file
->f_flags
& O_NONBLOCK
)
2039 msg_sys
->msg_flags
|= MSG_DONTWAIT
;
2041 * If this is sendmmsg() and current destination address is same as
2042 * previously succeeded address, omit asking LSM's decision.
2043 * used_address->name_len is initialized to UINT_MAX so that the first
2044 * destination address never matches.
2046 if (used_address
&& msg_sys
->msg_name
&&
2047 used_address
->name_len
== msg_sys
->msg_namelen
&&
2048 !memcmp(&used_address
->name
, msg_sys
->msg_name
,
2049 used_address
->name_len
)) {
2050 err
= sock_sendmsg_nosec(sock
, msg_sys
, total_len
);
2053 err
= sock_sendmsg(sock
, msg_sys
, total_len
);
2055 * If this is sendmmsg() and sending to current destination address was
2056 * successful, remember it.
2058 if (used_address
&& err
>= 0) {
2059 used_address
->name_len
= msg_sys
->msg_namelen
;
2060 if (msg_sys
->msg_name
)
2061 memcpy(&used_address
->name
, msg_sys
->msg_name
,
2062 used_address
->name_len
);
2067 sock_kfree_s(sock
->sk
, ctl_buf
, ctl_len
);
2069 if (iov
!= iovstack
)
2076 * BSD sendmsg interface
2079 long __sys_sendmsg(int fd
, struct msghdr __user
*msg
, unsigned flags
)
2081 int fput_needed
, err
;
2082 struct msghdr msg_sys
;
2083 struct socket
*sock
;
2085 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2089 err
= ___sys_sendmsg(sock
, msg
, &msg_sys
, flags
, NULL
);
2091 fput_light(sock
->file
, fput_needed
);
2096 SYSCALL_DEFINE3(sendmsg
, int, fd
, struct msghdr __user
*, msg
, unsigned int, flags
)
2098 if (flags
& MSG_CMSG_COMPAT
)
2100 return __sys_sendmsg(fd
, msg
, flags
);
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
,
2141 (struct msghdr __user
*)entry
,
2142 &msg_sys
, flags
, &used_address
);
2145 err
= put_user(err
, &entry
->msg_len
);
2154 fput_light(sock
->file
, fput_needed
);
2156 /* We only return an error if no datagrams were able to be sent */
2163 SYSCALL_DEFINE4(sendmmsg
, int, fd
, struct mmsghdr __user
*, mmsg
,
2164 unsigned int, vlen
, unsigned int, flags
)
2166 if (flags
& MSG_CMSG_COMPAT
)
2168 return __sys_sendmmsg(fd
, mmsg
, vlen
, flags
);
2171 static int ___sys_recvmsg(struct socket
*sock
, struct msghdr __user
*msg
,
2172 struct msghdr
*msg_sys
, unsigned int flags
, int nosec
)
2174 struct compat_msghdr __user
*msg_compat
=
2175 (struct compat_msghdr __user
*)msg
;
2176 struct iovec iovstack
[UIO_FASTIOV
];
2177 struct iovec
*iov
= iovstack
;
2178 unsigned long cmsg_ptr
;
2179 int err
, total_len
, len
;
2181 /* kernel mode address */
2182 struct sockaddr_storage addr
;
2184 /* user mode address pointers */
2185 struct sockaddr __user
*uaddr
;
2186 int __user
*uaddr_len
;
2188 if (MSG_CMSG_COMPAT
& flags
) {
2189 if (get_compat_msghdr(msg_sys
, msg_compat
))
2191 } else if (copy_from_user(msg_sys
, msg
, sizeof(struct msghdr
)))
2194 if (msg_sys
->msg_iovlen
> UIO_FASTIOV
) {
2196 if (msg_sys
->msg_iovlen
> UIO_MAXIOV
)
2199 iov
= kmalloc(msg_sys
->msg_iovlen
* sizeof(struct iovec
),
2206 * Save the user-mode address (verify_iovec will change the
2207 * kernel msghdr to use the kernel address space)
2210 uaddr
= (__force
void __user
*)msg_sys
->msg_name
;
2211 uaddr_len
= COMPAT_NAMELEN(msg
);
2212 if (MSG_CMSG_COMPAT
& flags
) {
2213 err
= verify_compat_iovec(msg_sys
, iov
, &addr
, VERIFY_WRITE
);
2215 err
= verify_iovec(msg_sys
, iov
, &addr
, VERIFY_WRITE
);
2220 cmsg_ptr
= (unsigned long)msg_sys
->msg_control
;
2221 msg_sys
->msg_flags
= flags
& (MSG_CMSG_CLOEXEC
|MSG_CMSG_COMPAT
);
2223 if (sock
->file
->f_flags
& O_NONBLOCK
)
2224 flags
|= MSG_DONTWAIT
;
2225 err
= (nosec
? sock_recvmsg_nosec
: sock_recvmsg
)(sock
, msg_sys
,
2231 if (uaddr
!= NULL
) {
2232 err
= move_addr_to_user(&addr
,
2233 msg_sys
->msg_namelen
, uaddr
,
2238 err
= __put_user((msg_sys
->msg_flags
& ~MSG_CMSG_COMPAT
),
2242 if (MSG_CMSG_COMPAT
& flags
)
2243 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2244 &msg_compat
->msg_controllen
);
2246 err
= __put_user((unsigned long)msg_sys
->msg_control
- cmsg_ptr
,
2247 &msg
->msg_controllen
);
2253 if (iov
!= iovstack
)
2260 * BSD recvmsg interface
2263 long __sys_recvmsg(int fd
, struct msghdr __user
*msg
, unsigned flags
)
2265 int fput_needed
, err
;
2266 struct msghdr msg_sys
;
2267 struct socket
*sock
;
2269 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2273 err
= ___sys_recvmsg(sock
, msg
, &msg_sys
, flags
, 0);
2275 fput_light(sock
->file
, fput_needed
);
2280 SYSCALL_DEFINE3(recvmsg
, int, fd
, struct msghdr __user
*, msg
,
2281 unsigned int, flags
)
2283 if (flags
& MSG_CMSG_COMPAT
)
2285 return __sys_recvmsg(fd
, msg
, flags
);
2289 * Linux recvmmsg interface
2292 int __sys_recvmmsg(int fd
, struct mmsghdr __user
*mmsg
, unsigned int vlen
,
2293 unsigned int flags
, struct timespec
*timeout
)
2295 int fput_needed
, err
, datagrams
;
2296 struct socket
*sock
;
2297 struct mmsghdr __user
*entry
;
2298 struct compat_mmsghdr __user
*compat_entry
;
2299 struct msghdr msg_sys
;
2300 struct timespec end_time
;
2303 poll_select_set_timeout(&end_time
, timeout
->tv_sec
,
2309 sock
= sockfd_lookup_light(fd
, &err
, &fput_needed
);
2313 err
= sock_error(sock
->sk
);
2318 compat_entry
= (struct compat_mmsghdr __user
*)mmsg
;
2320 while (datagrams
< vlen
) {
2322 * No need to ask LSM for more than the first datagram.
2324 if (MSG_CMSG_COMPAT
& flags
) {
2325 err
= ___sys_recvmsg(sock
, (struct msghdr __user
*)compat_entry
,
2326 &msg_sys
, flags
& ~MSG_WAITFORONE
,
2330 err
= __put_user(err
, &compat_entry
->msg_len
);
2333 err
= ___sys_recvmsg(sock
,
2334 (struct msghdr __user
*)entry
,
2335 &msg_sys
, flags
& ~MSG_WAITFORONE
,
2339 err
= put_user(err
, &entry
->msg_len
);
2347 /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */
2348 if (flags
& MSG_WAITFORONE
)
2349 flags
|= MSG_DONTWAIT
;
2352 ktime_get_ts(timeout
);
2353 *timeout
= timespec_sub(end_time
, *timeout
);
2354 if (timeout
->tv_sec
< 0) {
2355 timeout
->tv_sec
= timeout
->tv_nsec
= 0;
2359 /* Timeout, return less than vlen datagrams */
2360 if (timeout
->tv_nsec
== 0 && timeout
->tv_sec
== 0)
2364 /* Out of band data, return right away */
2365 if (msg_sys
.msg_flags
& MSG_OOB
)
2370 fput_light(sock
->file
, fput_needed
);
2375 if (datagrams
!= 0) {
2377 * We may return less entries than requested (vlen) if the
2378 * sock is non block and there aren't enough datagrams...
2380 if (err
!= -EAGAIN
) {
2382 * ... or if recvmsg returns an error after we
2383 * received some datagrams, where we record the
2384 * error to return on the next call or if the
2385 * app asks about it using getsockopt(SO_ERROR).
2387 sock
->sk
->sk_err
= -err
;
2396 SYSCALL_DEFINE5(recvmmsg
, int, fd
, struct mmsghdr __user
*, mmsg
,
2397 unsigned int, vlen
, unsigned int, flags
,
2398 struct timespec __user
*, timeout
)
2401 struct timespec timeout_sys
;
2403 if (flags
& MSG_CMSG_COMPAT
)
2407 return __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, NULL
);
2409 if (copy_from_user(&timeout_sys
, timeout
, sizeof(timeout_sys
)))
2412 datagrams
= __sys_recvmmsg(fd
, mmsg
, vlen
, flags
, &timeout_sys
);
2414 if (datagrams
> 0 &&
2415 copy_to_user(timeout
, &timeout_sys
, sizeof(timeout_sys
)))
2416 datagrams
= -EFAULT
;
2421 #ifdef __ARCH_WANT_SYS_SOCKETCALL
2422 /* Argument list sizes for sys_socketcall */
2423 #define AL(x) ((x) * sizeof(unsigned long))
2424 static const unsigned char nargs
[21] = {
2425 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
2426 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
2427 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
2434 * System call vectors.
2436 * Argument checking cleaned up. Saved 20% in size.
2437 * This function doesn't need to set the kernel lock because
2438 * it is set by the callees.
2441 SYSCALL_DEFINE2(socketcall
, int, call
, unsigned long __user
*, args
)
2443 unsigned long a
[AUDITSC_ARGS
];
2444 unsigned long a0
, a1
;
2448 if (call
< 1 || call
> SYS_SENDMMSG
)
2452 if (len
> sizeof(a
))
2455 /* copy_from_user should be SMP safe. */
2456 if (copy_from_user(a
, args
, len
))
2459 err
= audit_socketcall(nargs
[call
] / sizeof(unsigned long), a
);
2468 err
= sys_socket(a0
, a1
, a
[2]);
2471 err
= sys_bind(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2474 err
= sys_connect(a0
, (struct sockaddr __user
*)a1
, a
[2]);
2477 err
= sys_listen(a0
, a1
);
2480 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2481 (int __user
*)a
[2], 0);
2483 case SYS_GETSOCKNAME
:
2485 sys_getsockname(a0
, (struct sockaddr __user
*)a1
,
2486 (int __user
*)a
[2]);
2488 case SYS_GETPEERNAME
:
2490 sys_getpeername(a0
, (struct sockaddr __user
*)a1
,
2491 (int __user
*)a
[2]);
2493 case SYS_SOCKETPAIR
:
2494 err
= sys_socketpair(a0
, a1
, a
[2], (int __user
*)a
[3]);
2497 err
= sys_send(a0
, (void __user
*)a1
, a
[2], a
[3]);
2500 err
= sys_sendto(a0
, (void __user
*)a1
, a
[2], a
[3],
2501 (struct sockaddr __user
*)a
[4], a
[5]);
2504 err
= sys_recv(a0
, (void __user
*)a1
, a
[2], a
[3]);
2507 err
= sys_recvfrom(a0
, (void __user
*)a1
, a
[2], a
[3],
2508 (struct sockaddr __user
*)a
[4],
2509 (int __user
*)a
[5]);
2512 err
= sys_shutdown(a0
, a1
);
2514 case SYS_SETSOCKOPT
:
2515 err
= sys_setsockopt(a0
, a1
, a
[2], (char __user
*)a
[3], a
[4]);
2517 case SYS_GETSOCKOPT
:
2519 sys_getsockopt(a0
, a1
, a
[2], (char __user
*)a
[3],
2520 (int __user
*)a
[4]);
2523 err
= sys_sendmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2526 err
= sys_sendmmsg(a0
, (struct mmsghdr __user
*)a1
, a
[2], a
[3]);
2529 err
= sys_recvmsg(a0
, (struct msghdr __user
*)a1
, a
[2]);
2532 err
= sys_recvmmsg(a0
, (struct mmsghdr __user
*)a1
, a
[2], a
[3],
2533 (struct timespec __user
*)a
[4]);
2536 err
= sys_accept4(a0
, (struct sockaddr __user
*)a1
,
2537 (int __user
*)a
[2], a
[3]);
2546 #endif /* __ARCH_WANT_SYS_SOCKETCALL */
2549 * sock_register - add a socket protocol handler
2550 * @ops: description of protocol
2552 * This function is called by a protocol handler that wants to
2553 * advertise its address family, and have it linked into the
2554 * socket interface. The value ops->family coresponds to the
2555 * socket system call protocol family.
2557 int sock_register(const struct net_proto_family
*ops
)
2561 if (ops
->family
>= NPROTO
) {
2562 printk(KERN_CRIT
"protocol %d >= NPROTO(%d)\n", ops
->family
,
2567 spin_lock(&net_family_lock
);
2568 if (rcu_dereference_protected(net_families
[ops
->family
],
2569 lockdep_is_held(&net_family_lock
)))
2572 rcu_assign_pointer(net_families
[ops
->family
], ops
);
2575 spin_unlock(&net_family_lock
);
2577 printk(KERN_INFO
"NET: Registered protocol family %d\n", ops
->family
);
2580 EXPORT_SYMBOL(sock_register
);
2583 * sock_unregister - remove a protocol handler
2584 * @family: protocol family to remove
2586 * This function is called by a protocol handler that wants to
2587 * remove its address family, and have it unlinked from the
2588 * new socket creation.
2590 * If protocol handler is a module, then it can use module reference
2591 * counts to protect against new references. If protocol handler is not
2592 * a module then it needs to provide its own protection in
2593 * the ops->create routine.
2595 void sock_unregister(int family
)
2597 BUG_ON(family
< 0 || family
>= NPROTO
);
2599 spin_lock(&net_family_lock
);
2600 RCU_INIT_POINTER(net_families
[family
], NULL
);
2601 spin_unlock(&net_family_lock
);
2605 printk(KERN_INFO
"NET: Unregistered protocol family %d\n", family
);
2607 EXPORT_SYMBOL(sock_unregister
);
2609 static int __init
sock_init(void)
2613 * Initialize the network sysctl infrastructure.
2615 err
= net_sysctl_init();
2620 * Initialize skbuff SLAB cache
2625 * Initialize the protocols module.
2630 err
= register_filesystem(&sock_fs_type
);
2633 sock_mnt
= kern_mount(&sock_fs_type
);
2634 if (IS_ERR(sock_mnt
)) {
2635 err
= PTR_ERR(sock_mnt
);
2639 /* The real protocol initialization is performed in later initcalls.
2642 #ifdef CONFIG_NETFILTER
2643 err
= netfilter_init();
2648 #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING
2649 skb_timestamping_init();
2656 unregister_filesystem(&sock_fs_type
);
2661 core_initcall(sock_init
); /* early initcall */
2663 #ifdef CONFIG_PROC_FS
2664 void socket_seq_show(struct seq_file
*seq
)
2669 for_each_possible_cpu(cpu
)
2670 counter
+= per_cpu(sockets_in_use
, cpu
);
2672 /* It can be negative, by the way. 8) */
2676 seq_printf(seq
, "sockets: used %d\n", counter
);
2678 #endif /* CONFIG_PROC_FS */
2680 #ifdef CONFIG_COMPAT
2681 static int do_siocgstamp(struct net
*net
, struct socket
*sock
,
2682 unsigned int cmd
, void __user
*up
)
2684 mm_segment_t old_fs
= get_fs();
2689 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&ktv
);
2692 err
= compat_put_timeval(&ktv
, up
);
2697 static int do_siocgstampns(struct net
*net
, struct socket
*sock
,
2698 unsigned int cmd
, void __user
*up
)
2700 mm_segment_t old_fs
= get_fs();
2701 struct timespec kts
;
2705 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)&kts
);
2708 err
= compat_put_timespec(&kts
, up
);
2713 static int dev_ifname32(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2715 struct ifreq __user
*uifr
;
2718 uifr
= compat_alloc_user_space(sizeof(struct ifreq
));
2719 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2722 err
= dev_ioctl(net
, SIOCGIFNAME
, uifr
);
2726 if (copy_in_user(uifr32
, uifr
, sizeof(struct compat_ifreq
)))
2732 static int dev_ifconf(struct net
*net
, struct compat_ifconf __user
*uifc32
)
2734 struct compat_ifconf ifc32
;
2736 struct ifconf __user
*uifc
;
2737 struct compat_ifreq __user
*ifr32
;
2738 struct ifreq __user
*ifr
;
2742 if (copy_from_user(&ifc32
, uifc32
, sizeof(struct compat_ifconf
)))
2745 memset(&ifc
, 0, sizeof(ifc
));
2746 if (ifc32
.ifcbuf
== 0) {
2750 uifc
= compat_alloc_user_space(sizeof(struct ifconf
));
2752 size_t len
= ((ifc32
.ifc_len
/ sizeof(struct compat_ifreq
)) + 1) *
2753 sizeof(struct ifreq
);
2754 uifc
= compat_alloc_user_space(sizeof(struct ifconf
) + len
);
2756 ifr
= ifc
.ifc_req
= (void __user
*)(uifc
+ 1);
2757 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2758 for (i
= 0; i
< ifc32
.ifc_len
; i
+= sizeof(struct compat_ifreq
)) {
2759 if (copy_in_user(ifr
, ifr32
, sizeof(struct compat_ifreq
)))
2765 if (copy_to_user(uifc
, &ifc
, sizeof(struct ifconf
)))
2768 err
= dev_ioctl(net
, SIOCGIFCONF
, uifc
);
2772 if (copy_from_user(&ifc
, uifc
, sizeof(struct ifconf
)))
2776 ifr32
= compat_ptr(ifc32
.ifcbuf
);
2778 i
+ sizeof(struct compat_ifreq
) <= ifc32
.ifc_len
&& j
< ifc
.ifc_len
;
2779 i
+= sizeof(struct compat_ifreq
), j
+= sizeof(struct ifreq
)) {
2780 if (copy_in_user(ifr32
, ifr
, sizeof(struct compat_ifreq
)))
2786 if (ifc32
.ifcbuf
== 0) {
2787 /* Translate from 64-bit structure multiple to
2791 i
= ((i
/ sizeof(struct ifreq
)) * sizeof(struct compat_ifreq
));
2796 if (copy_to_user(uifc32
, &ifc32
, sizeof(struct compat_ifconf
)))
2802 static int ethtool_ioctl(struct net
*net
, struct compat_ifreq __user
*ifr32
)
2804 struct compat_ethtool_rxnfc __user
*compat_rxnfc
;
2805 bool convert_in
= false, convert_out
= false;
2806 size_t buf_size
= ALIGN(sizeof(struct ifreq
), 8);
2807 struct ethtool_rxnfc __user
*rxnfc
;
2808 struct ifreq __user
*ifr
;
2809 u32 rule_cnt
= 0, actual_rule_cnt
;
2814 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2817 compat_rxnfc
= compat_ptr(data
);
2819 if (get_user(ethcmd
, &compat_rxnfc
->cmd
))
2822 /* Most ethtool structures are defined without padding.
2823 * Unfortunately struct ethtool_rxnfc is an exception.
2828 case ETHTOOL_GRXCLSRLALL
:
2829 /* Buffer size is variable */
2830 if (get_user(rule_cnt
, &compat_rxnfc
->rule_cnt
))
2832 if (rule_cnt
> KMALLOC_MAX_SIZE
/ sizeof(u32
))
2834 buf_size
+= rule_cnt
* sizeof(u32
);
2836 case ETHTOOL_GRXRINGS
:
2837 case ETHTOOL_GRXCLSRLCNT
:
2838 case ETHTOOL_GRXCLSRULE
:
2839 case ETHTOOL_SRXCLSRLINS
:
2842 case ETHTOOL_SRXCLSRLDEL
:
2843 buf_size
+= sizeof(struct ethtool_rxnfc
);
2848 ifr
= compat_alloc_user_space(buf_size
);
2849 rxnfc
= (void __user
*)ifr
+ ALIGN(sizeof(struct ifreq
), 8);
2851 if (copy_in_user(&ifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2854 if (put_user(convert_in
? rxnfc
: compat_ptr(data
),
2855 &ifr
->ifr_ifru
.ifru_data
))
2859 /* We expect there to be holes between fs.m_ext and
2860 * fs.ring_cookie and at the end of fs, but nowhere else.
2862 BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc
, fs
.m_ext
) +
2863 sizeof(compat_rxnfc
->fs
.m_ext
) !=
2864 offsetof(struct ethtool_rxnfc
, fs
.m_ext
) +
2865 sizeof(rxnfc
->fs
.m_ext
));
2867 offsetof(struct compat_ethtool_rxnfc
, fs
.location
) -
2868 offsetof(struct compat_ethtool_rxnfc
, fs
.ring_cookie
) !=
2869 offsetof(struct ethtool_rxnfc
, fs
.location
) -
2870 offsetof(struct ethtool_rxnfc
, fs
.ring_cookie
));
2872 if (copy_in_user(rxnfc
, compat_rxnfc
,
2873 (void __user
*)(&rxnfc
->fs
.m_ext
+ 1) -
2874 (void __user
*)rxnfc
) ||
2875 copy_in_user(&rxnfc
->fs
.ring_cookie
,
2876 &compat_rxnfc
->fs
.ring_cookie
,
2877 (void __user
*)(&rxnfc
->fs
.location
+ 1) -
2878 (void __user
*)&rxnfc
->fs
.ring_cookie
) ||
2879 copy_in_user(&rxnfc
->rule_cnt
, &compat_rxnfc
->rule_cnt
,
2880 sizeof(rxnfc
->rule_cnt
)))
2884 ret
= dev_ioctl(net
, SIOCETHTOOL
, ifr
);
2889 if (copy_in_user(compat_rxnfc
, rxnfc
,
2890 (const void __user
*)(&rxnfc
->fs
.m_ext
+ 1) -
2891 (const void __user
*)rxnfc
) ||
2892 copy_in_user(&compat_rxnfc
->fs
.ring_cookie
,
2893 &rxnfc
->fs
.ring_cookie
,
2894 (const void __user
*)(&rxnfc
->fs
.location
+ 1) -
2895 (const void __user
*)&rxnfc
->fs
.ring_cookie
) ||
2896 copy_in_user(&compat_rxnfc
->rule_cnt
, &rxnfc
->rule_cnt
,
2897 sizeof(rxnfc
->rule_cnt
)))
2900 if (ethcmd
== ETHTOOL_GRXCLSRLALL
) {
2901 /* As an optimisation, we only copy the actual
2902 * number of rules that the underlying
2903 * function returned. Since Mallory might
2904 * change the rule count in user memory, we
2905 * check that it is less than the rule count
2906 * originally given (as the user buffer size),
2907 * which has been range-checked.
2909 if (get_user(actual_rule_cnt
, &rxnfc
->rule_cnt
))
2911 if (actual_rule_cnt
< rule_cnt
)
2912 rule_cnt
= actual_rule_cnt
;
2913 if (copy_in_user(&compat_rxnfc
->rule_locs
[0],
2914 &rxnfc
->rule_locs
[0],
2915 rule_cnt
* sizeof(u32
)))
2923 static int compat_siocwandev(struct net
*net
, struct compat_ifreq __user
*uifr32
)
2926 compat_uptr_t uptr32
;
2927 struct ifreq __user
*uifr
;
2929 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2930 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
2933 if (get_user(uptr32
, &uifr32
->ifr_settings
.ifs_ifsu
))
2936 uptr
= compat_ptr(uptr32
);
2938 if (put_user(uptr
, &uifr
->ifr_settings
.ifs_ifsu
.raw_hdlc
))
2941 return dev_ioctl(net
, SIOCWANDEV
, uifr
);
2944 static int bond_ioctl(struct net
*net
, unsigned int cmd
,
2945 struct compat_ifreq __user
*ifr32
)
2948 struct ifreq __user
*uifr
;
2949 mm_segment_t old_fs
;
2955 case SIOCBONDENSLAVE
:
2956 case SIOCBONDRELEASE
:
2957 case SIOCBONDSETHWADDR
:
2958 case SIOCBONDCHANGEACTIVE
:
2959 if (copy_from_user(&kifr
, ifr32
, sizeof(struct compat_ifreq
)))
2964 err
= dev_ioctl(net
, cmd
,
2965 (struct ifreq __user __force
*) &kifr
);
2969 case SIOCBONDSLAVEINFOQUERY
:
2970 case SIOCBONDINFOQUERY
:
2971 uifr
= compat_alloc_user_space(sizeof(*uifr
));
2972 if (copy_in_user(&uifr
->ifr_name
, &ifr32
->ifr_name
, IFNAMSIZ
))
2975 if (get_user(data
, &ifr32
->ifr_ifru
.ifru_data
))
2978 datap
= compat_ptr(data
);
2979 if (put_user(datap
, &uifr
->ifr_ifru
.ifru_data
))
2982 return dev_ioctl(net
, cmd
, uifr
);
2984 return -ENOIOCTLCMD
;
2988 static int siocdevprivate_ioctl(struct net
*net
, unsigned int cmd
,
2989 struct compat_ifreq __user
*u_ifreq32
)
2991 struct ifreq __user
*u_ifreq64
;
2992 char tmp_buf
[IFNAMSIZ
];
2993 void __user
*data64
;
2996 if (copy_from_user(&tmp_buf
[0], &(u_ifreq32
->ifr_ifrn
.ifrn_name
[0]),
2999 if (__get_user(data32
, &u_ifreq32
->ifr_ifru
.ifru_data
))
3001 data64
= compat_ptr(data32
);
3003 u_ifreq64
= compat_alloc_user_space(sizeof(*u_ifreq64
));
3005 /* Don't check these user accesses, just let that get trapped
3006 * in the ioctl handler instead.
3008 if (copy_to_user(&u_ifreq64
->ifr_ifrn
.ifrn_name
[0], &tmp_buf
[0],
3011 if (__put_user(data64
, &u_ifreq64
->ifr_ifru
.ifru_data
))
3014 return dev_ioctl(net
, cmd
, u_ifreq64
);
3017 static int dev_ifsioc(struct net
*net
, struct socket
*sock
,
3018 unsigned int cmd
, struct compat_ifreq __user
*uifr32
)
3020 struct ifreq __user
*uifr
;
3023 uifr
= compat_alloc_user_space(sizeof(*uifr
));
3024 if (copy_in_user(uifr
, uifr32
, sizeof(*uifr32
)))
3027 err
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long)uifr
);
3038 case SIOCGIFBRDADDR
:
3039 case SIOCGIFDSTADDR
:
3040 case SIOCGIFNETMASK
:
3045 if (copy_in_user(uifr32
, uifr
, sizeof(*uifr32
)))
3053 static int compat_sioc_ifmap(struct net
*net
, unsigned int cmd
,
3054 struct compat_ifreq __user
*uifr32
)
3057 struct compat_ifmap __user
*uifmap32
;
3058 mm_segment_t old_fs
;
3061 uifmap32
= &uifr32
->ifr_ifru
.ifru_map
;
3062 err
= copy_from_user(&ifr
, uifr32
, sizeof(ifr
.ifr_name
));
3063 err
|= __get_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
3064 err
|= __get_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
3065 err
|= __get_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
3066 err
|= __get_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
3067 err
|= __get_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
3068 err
|= __get_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
3074 err
= dev_ioctl(net
, cmd
, (void __user __force
*)&ifr
);
3077 if (cmd
== SIOCGIFMAP
&& !err
) {
3078 err
= copy_to_user(uifr32
, &ifr
, sizeof(ifr
.ifr_name
));
3079 err
|= __put_user(ifr
.ifr_map
.mem_start
, &uifmap32
->mem_start
);
3080 err
|= __put_user(ifr
.ifr_map
.mem_end
, &uifmap32
->mem_end
);
3081 err
|= __put_user(ifr
.ifr_map
.base_addr
, &uifmap32
->base_addr
);
3082 err
|= __put_user(ifr
.ifr_map
.irq
, &uifmap32
->irq
);
3083 err
|= __put_user(ifr
.ifr_map
.dma
, &uifmap32
->dma
);
3084 err
|= __put_user(ifr
.ifr_map
.port
, &uifmap32
->port
);
3091 static int compat_siocshwtstamp(struct net
*net
, struct compat_ifreq __user
*uifr32
)
3094 compat_uptr_t uptr32
;
3095 struct ifreq __user
*uifr
;
3097 uifr
= compat_alloc_user_space(sizeof(*uifr
));
3098 if (copy_in_user(uifr
, uifr32
, sizeof(struct compat_ifreq
)))
3101 if (get_user(uptr32
, &uifr32
->ifr_data
))
3104 uptr
= compat_ptr(uptr32
);
3106 if (put_user(uptr
, &uifr
->ifr_data
))
3109 return dev_ioctl(net
, SIOCSHWTSTAMP
, uifr
);
3114 struct sockaddr rt_dst
; /* target address */
3115 struct sockaddr rt_gateway
; /* gateway addr (RTF_GATEWAY) */
3116 struct sockaddr rt_genmask
; /* target network mask (IP) */
3117 unsigned short rt_flags
;
3120 unsigned char rt_tos
;
3121 unsigned char rt_class
;
3123 short rt_metric
; /* +1 for binary compatibility! */
3124 /* char * */ u32 rt_dev
; /* forcing the device at add */
3125 u32 rt_mtu
; /* per route MTU/Window */
3126 u32 rt_window
; /* Window clamping */
3127 unsigned short rt_irtt
; /* Initial RTT */
3130 struct in6_rtmsg32
{
3131 struct in6_addr rtmsg_dst
;
3132 struct in6_addr rtmsg_src
;
3133 struct in6_addr rtmsg_gateway
;
3143 static int routing_ioctl(struct net
*net
, struct socket
*sock
,
3144 unsigned int cmd
, void __user
*argp
)
3148 struct in6_rtmsg r6
;
3152 mm_segment_t old_fs
= get_fs();
3154 if (sock
&& sock
->sk
&& sock
->sk
->sk_family
== AF_INET6
) { /* ipv6 */
3155 struct in6_rtmsg32 __user
*ur6
= argp
;
3156 ret
= copy_from_user(&r6
.rtmsg_dst
, &(ur6
->rtmsg_dst
),
3157 3 * sizeof(struct in6_addr
));
3158 ret
|= __get_user(r6
.rtmsg_type
, &(ur6
->rtmsg_type
));
3159 ret
|= __get_user(r6
.rtmsg_dst_len
, &(ur6
->rtmsg_dst_len
));
3160 ret
|= __get_user(r6
.rtmsg_src_len
, &(ur6
->rtmsg_src_len
));
3161 ret
|= __get_user(r6
.rtmsg_metric
, &(ur6
->rtmsg_metric
));
3162 ret
|= __get_user(r6
.rtmsg_info
, &(ur6
->rtmsg_info
));
3163 ret
|= __get_user(r6
.rtmsg_flags
, &(ur6
->rtmsg_flags
));
3164 ret
|= __get_user(r6
.rtmsg_ifindex
, &(ur6
->rtmsg_ifindex
));
3168 struct rtentry32 __user
*ur4
= argp
;
3169 ret
= copy_from_user(&r4
.rt_dst
, &(ur4
->rt_dst
),
3170 3 * sizeof(struct sockaddr
));
3171 ret
|= __get_user(r4
.rt_flags
, &(ur4
->rt_flags
));
3172 ret
|= __get_user(r4
.rt_metric
, &(ur4
->rt_metric
));
3173 ret
|= __get_user(r4
.rt_mtu
, &(ur4
->rt_mtu
));
3174 ret
|= __get_user(r4
.rt_window
, &(ur4
->rt_window
));
3175 ret
|= __get_user(r4
.rt_irtt
, &(ur4
->rt_irtt
));
3176 ret
|= __get_user(rtdev
, &(ur4
->rt_dev
));
3178 ret
|= copy_from_user(devname
, compat_ptr(rtdev
), 15);
3179 r4
.rt_dev
= (char __user __force
*)devname
;
3193 ret
= sock_do_ioctl(net
, sock
, cmd
, (unsigned long) r
);
3200 /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
3201 * for some operations; this forces use of the newer bridge-utils that
3202 * use compatible ioctls
3204 static int old_bridge_ioctl(compat_ulong_t __user
*argp
)
3208 if (get_user(tmp
, argp
))
3210 if (tmp
== BRCTL_GET_VERSION
)
3211 return BRCTL_VERSION
+ 1;
3215 static int compat_sock_ioctl_trans(struct file
*file
, struct socket
*sock
,
3216 unsigned int cmd
, unsigned long arg
)
3218 void __user
*argp
= compat_ptr(arg
);
3219 struct sock
*sk
= sock
->sk
;
3220 struct net
*net
= sock_net(sk
);
3222 if (cmd
>= SIOCDEVPRIVATE
&& cmd
<= (SIOCDEVPRIVATE
+ 15))
3223 return siocdevprivate_ioctl(net
, cmd
, argp
);
3228 return old_bridge_ioctl(argp
);
3230 return dev_ifname32(net
, argp
);
3232 return dev_ifconf(net
, argp
);
3234 return ethtool_ioctl(net
, argp
);
3236 return compat_siocwandev(net
, argp
);
3239 return compat_sioc_ifmap(net
, cmd
, argp
);
3240 case SIOCBONDENSLAVE
:
3241 case SIOCBONDRELEASE
:
3242 case SIOCBONDSETHWADDR
:
3243 case SIOCBONDSLAVEINFOQUERY
:
3244 case SIOCBONDINFOQUERY
:
3245 case SIOCBONDCHANGEACTIVE
:
3246 return bond_ioctl(net
, cmd
, argp
);
3249 return routing_ioctl(net
, sock
, cmd
, argp
);
3251 return do_siocgstamp(net
, sock
, cmd
, argp
);
3253 return do_siocgstampns(net
, sock
, cmd
, argp
);
3255 return compat_siocshwtstamp(net
, argp
);
3267 return sock_ioctl(file
, cmd
, arg
);
3284 case SIOCSIFHWBROADCAST
:
3286 case SIOCGIFBRDADDR
:
3287 case SIOCSIFBRDADDR
:
3288 case SIOCGIFDSTADDR
:
3289 case SIOCSIFDSTADDR
:
3290 case SIOCGIFNETMASK
:
3291 case SIOCSIFNETMASK
:
3302 return dev_ifsioc(net
, sock
, cmd
, argp
);
3308 return sock_do_ioctl(net
, sock
, cmd
, arg
);
3311 return -ENOIOCTLCMD
;
3314 static long compat_sock_ioctl(struct file
*file
, unsigned int cmd
,
3317 struct socket
*sock
= file
->private_data
;
3318 int ret
= -ENOIOCTLCMD
;
3325 if (sock
->ops
->compat_ioctl
)
3326 ret
= sock
->ops
->compat_ioctl(sock
, cmd
, arg
);
3328 if (ret
== -ENOIOCTLCMD
&&
3329 (cmd
>= SIOCIWFIRST
&& cmd
<= SIOCIWLAST
))
3330 ret
= compat_wext_handle_ioctl(net
, cmd
, arg
);
3332 if (ret
== -ENOIOCTLCMD
)
3333 ret
= compat_sock_ioctl_trans(file
, sock
, cmd
, arg
);
3339 int kernel_bind(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
)
3341 return sock
->ops
->bind(sock
, addr
, addrlen
);
3343 EXPORT_SYMBOL(kernel_bind
);
3345 int kernel_listen(struct socket
*sock
, int backlog
)
3347 return sock
->ops
->listen(sock
, backlog
);
3349 EXPORT_SYMBOL(kernel_listen
);
3351 int kernel_accept(struct socket
*sock
, struct socket
**newsock
, int flags
)
3353 struct sock
*sk
= sock
->sk
;
3356 err
= sock_create_lite(sk
->sk_family
, sk
->sk_type
, sk
->sk_protocol
,
3361 err
= sock
->ops
->accept(sock
, *newsock
, flags
);
3363 sock_release(*newsock
);
3368 (*newsock
)->ops
= sock
->ops
;
3369 __module_get((*newsock
)->ops
->owner
);
3374 EXPORT_SYMBOL(kernel_accept
);
3376 int kernel_connect(struct socket
*sock
, struct sockaddr
*addr
, int addrlen
,
3379 return sock
->ops
->connect(sock
, addr
, addrlen
, flags
);
3381 EXPORT_SYMBOL(kernel_connect
);
3383 int kernel_getsockname(struct socket
*sock
, struct sockaddr
*addr
,
3386 return sock
->ops
->getname(sock
, addr
, addrlen
, 0);
3388 EXPORT_SYMBOL(kernel_getsockname
);
3390 int kernel_getpeername(struct socket
*sock
, struct sockaddr
*addr
,
3393 return sock
->ops
->getname(sock
, addr
, addrlen
, 1);
3395 EXPORT_SYMBOL(kernel_getpeername
);
3397 int kernel_getsockopt(struct socket
*sock
, int level
, int optname
,
3398 char *optval
, int *optlen
)
3400 mm_segment_t oldfs
= get_fs();
3401 char __user
*uoptval
;
3402 int __user
*uoptlen
;
3405 uoptval
= (char __user __force
*) optval
;
3406 uoptlen
= (int __user __force
*) optlen
;
3409 if (level
== SOL_SOCKET
)
3410 err
= sock_getsockopt(sock
, level
, optname
, uoptval
, uoptlen
);
3412 err
= sock
->ops
->getsockopt(sock
, level
, optname
, uoptval
,
3417 EXPORT_SYMBOL(kernel_getsockopt
);
3419 int kernel_setsockopt(struct socket
*sock
, int level
, int optname
,
3420 char *optval
, unsigned int optlen
)
3422 mm_segment_t oldfs
= get_fs();
3423 char __user
*uoptval
;
3426 uoptval
= (char __user __force
*) optval
;
3429 if (level
== SOL_SOCKET
)
3430 err
= sock_setsockopt(sock
, level
, optname
, uoptval
, optlen
);
3432 err
= sock
->ops
->setsockopt(sock
, level
, optname
, uoptval
,
3437 EXPORT_SYMBOL(kernel_setsockopt
);
3439 int kernel_sendpage(struct socket
*sock
, struct page
*page
, int offset
,
3440 size_t size
, int flags
)
3442 if (sock
->ops
->sendpage
)
3443 return sock
->ops
->sendpage(sock
, page
, offset
, size
, flags
);
3445 return sock_no_sendpage(sock
, page
, offset
, size
, flags
);
3447 EXPORT_SYMBOL(kernel_sendpage
);
3449 int kernel_sock_ioctl(struct socket
*sock
, int cmd
, unsigned long arg
)
3451 mm_segment_t oldfs
= get_fs();
3455 err
= sock
->ops
->ioctl(sock
, cmd
, arg
);
3460 EXPORT_SYMBOL(kernel_sock_ioctl
);
3462 int kernel_sock_shutdown(struct socket
*sock
, enum sock_shutdown_cmd how
)
3464 return sock
->ops
->shutdown(sock
, how
);
3466 EXPORT_SYMBOL(kernel_sock_shutdown
);