2 * NET An implementation of the SOCKET network access protocol.
4 * Version: @(#)socket.c 1.1.93 18/02/95
6 * Authors: Orest Zborowski, <obz@Kodak.COM>
8 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
11 * Anonymous : NOTSOCK/BADF cleanup. Error fix in
13 * Alan Cox : verify_area() fixes
14 * Alan Cox : Removed DDI
15 * Jonathan Kamens : SOCK_DGRAM reconnect bug
16 * Alan Cox : Moved a load of checks to the very
18 * Alan Cox : Move address structures to/from user
19 * mode above the protocol layers.
20 * Rob Janssen : Allow 0 length sends.
21 * Alan Cox : Asynchronous I/O support (cribbed from the
23 * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style)
24 * Jeff Uphoff : Made max number of sockets command-line
26 * Matti Aarnio : Made the number of sockets dynamic,
27 * to be allocated when needed, and mr.
28 * Uphoff's max is used as max to be
29 * allowed to allocate.
30 * Linus : Argh. removed all the socket allocation
31 * altogether: it's in the inode now.
32 * Alan Cox : Made sock_alloc()/sock_release() public
33 * for NetROM and future kernel nfsd type
35 * Alan Cox : sendmsg/recvmsg basics.
36 * Tom Dyas : Export net symbols.
37 * Marcin Dalecki : Fixed problems with CONFIG_NET="n".
38 * Alan Cox : Added thread locking to sys_* calls
39 * for sockets. May have errors at the
41 * Kevin Buhr : Fixed the dumb errors in the above.
42 * Andi Kleen : Some small cleanups, optimizations,
43 * and fixed a copy_from_user() bug.
44 * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0)
45 * Tigran Aivazian : Made listen(2) backlog sanity checks
46 * protocol-independent
49 * This program is free software; you can redistribute it and/or
50 * modify it under the terms of the GNU General Public License
51 * as published by the Free Software Foundation; either version
52 * 2 of the License, or (at your option) any later version.
55 * This module is effectively the top level interface to the BSD socket
58 * Based upon Swansea University Computer Society NET3.039
62 #include <linux/socket.h>
63 #include <linux/file.h>
64 #include <linux/net.h>
65 #include <linux/interrupt.h>
66 #include <linux/thread_info.h>
67 #include <linux/rcupdate.h>
68 #include <linux/netdevice.h>
69 #include <linux/proc_fs.h>
70 #include <linux/seq_file.h>
71 #include <linux/mutex.h>
72 #include <linux/wanrouter.h>
73 #include <linux/if_bridge.h>
74 #include <linux/if_frad.h>
75 #include <linux/if_vlan.h>
76 #include <linux/init.h>
77 #include <linux/poll.h>
78 #include <linux/cache.h>
79 #include <linux/module.h>
80 #include <linux/highmem.h>
81 #include <linux/mount.h>
82 #include <linux/security.h>
83 #include <linux/syscalls.h>
84 #include <linux/compat.h>
85 #include <linux/kmod.h>
86 #include <linux/audit.h>
87 #include <linux/wireless.h>
88 #include <linux/nsproxy.h>
89 #include <linux/magic.h>
91 #include <asm/uaccess.h>
92 #include <asm/unistd.h>
94 #include <net/compat.h>
98 #include <linux/netfilter.h>
100 #include <linux/if_tun.h>
101 #include <linux/ipv6_route.h>
102 #include <linux/route.h>
103 #include <linux/sockios.h>
104 #include <linux/atalk.h>
106 static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
107 static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
108 unsigned long nr_segs, loff_t pos);
109 static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
110 unsigned long nr_segs, loff_t pos);
111 static int sock_mmap(struct file *file, struct vm_area_struct *vma);
113 static int sock_close(struct inode *inode, struct file *file);
114 static unsigned int sock_poll(struct file *file,
115 struct poll_table_struct *wait);
116 static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
118 static long compat_sock_ioctl(struct file *file,
119 unsigned int cmd, unsigned long arg);
121 static int sock_fasync(int fd, struct file *filp, int on);
122 static ssize_t sock_sendpage(struct file *file, struct page *page,
123 int offset, size_t size, loff_t *ppos, int more);
124 static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
125 struct pipe_inode_info *pipe, size_t len,
129 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
130 * in the operation structures but are done directly via the socketcall() multiplexor.
133 static const struct file_operations socket_file_ops = {
134 .owner = THIS_MODULE,
136 .aio_read = sock_aio_read,
137 .aio_write = sock_aio_write,
139 .unlocked_ioctl = sock_ioctl,
141 .compat_ioctl = compat_sock_ioctl,
144 .open = sock_no_open, /* special open code to disallow open via /proc */
145 .release = sock_close,
146 .fasync = sock_fasync,
147 .sendpage = sock_sendpage,
148 .splice_write = generic_splice_sendpage,
149 .splice_read = sock_splice_read,
153 * The protocol list. Each protocol is registered in here.
156 static DEFINE_SPINLOCK(net_family_lock);
157 static const struct net_proto_family *net_families[NPROTO] __read_mostly;
160 * Statistics counters of the socket lists
163 static DEFINE_PER_CPU(int, sockets_in_use) = 0;
167 * Move socket addresses back and forth across the kernel/user
168 * divide and look after the messy bits.
171 #define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
172 16 for IP, 16 for IPX,
175 must be at least one bigger than
176 the AF_UNIX size (see net/unix/af_unix.c
181 * move_addr_to_kernel - copy a socket address into kernel space
182 * @uaddr: Address in user space
183 * @kaddr: Address in kernel space
184 * @ulen: Length in user space
186 * The address is copied into kernel space. If the provided address is
187 * too long an error code of -EINVAL is returned. If the copy gives
188 * invalid addresses -EFAULT is returned. On a success 0 is returned.
191 int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr)
193 if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))
197 if (copy_from_user(kaddr, uaddr, ulen))
199 return audit_sockaddr(ulen, kaddr);
203 * move_addr_to_user - copy an address to user space
204 * @kaddr: kernel space address
205 * @klen: length of address in kernel
206 * @uaddr: user space address
207 * @ulen: pointer to user length field
209 * The value pointed to by ulen on entry is the buffer length available.
210 * This is overwritten with the buffer space used. -EINVAL is returned
211 * if an overlong buffer is specified or a negative buffer size. -EFAULT
212 * is returned if either the buffer or the length field are not
214 * After copying the data up to the limit the user specifies, the true
215 * length of the data is written over the length limit the user
216 * specified. Zero is returned for a success.
219 int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr,
225 err = get_user(len, ulen);
230 if (len < 0 || len > sizeof(struct sockaddr_storage))
233 if (audit_sockaddr(klen, kaddr))
235 if (copy_to_user(uaddr, kaddr, len))
239 * "fromlen shall refer to the value before truncation.."
242 return __put_user(klen, ulen);
245 static struct kmem_cache *sock_inode_cachep __read_mostly;
247 static struct inode *sock_alloc_inode(struct super_block *sb)
249 struct socket_alloc *ei;
251 ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
254 init_waitqueue_head(&ei->socket.wait);
256 ei->socket.fasync_list = NULL;
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 kmem_cache_free(sock_inode_cachep,
269 container_of(inode, struct socket_alloc, vfs_inode));
272 static void init_once(void *foo)
274 struct socket_alloc *ei = (struct socket_alloc *)foo;
276 inode_init_once(&ei->vfs_inode);
279 static int init_inodecache(void)
281 sock_inode_cachep = kmem_cache_create("sock_inode_cache",
282 sizeof(struct socket_alloc),
284 (SLAB_HWCACHE_ALIGN |
285 SLAB_RECLAIM_ACCOUNT |
288 if (sock_inode_cachep == NULL)
293 static const struct super_operations sockfs_ops = {
294 .alloc_inode = sock_alloc_inode,
295 .destroy_inode =sock_destroy_inode,
296 .statfs = simple_statfs,
299 static int sockfs_get_sb(struct file_system_type *fs_type,
300 int flags, const char *dev_name, void *data,
301 struct vfsmount *mnt)
303 return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC,
307 static struct vfsmount *sock_mnt __read_mostly;
309 static struct file_system_type sock_fs_type = {
311 .get_sb = sockfs_get_sb,
312 .kill_sb = kill_anon_super,
315 static int sockfs_delete_dentry(struct dentry *dentry)
318 * At creation time, we pretended this dentry was hashed
319 * (by clearing DCACHE_UNHASHED bit in d_flags)
320 * At delete time, we restore the truth : not hashed.
321 * (so that dput() can proceed correctly)
323 dentry->d_flags |= DCACHE_UNHASHED;
328 * sockfs_dname() is called from d_path().
330 static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen)
332 return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]",
333 dentry->d_inode->i_ino);
336 static const struct dentry_operations sockfs_dentry_operations = {
337 .d_delete = sockfs_delete_dentry,
338 .d_dname = sockfs_dname,
342 * Obtains the first available file descriptor and sets it up for use.
344 * These functions create file structures and maps them to fd space
345 * of the current process. On success it returns file descriptor
346 * and file struct implicitly stored in sock->file.
347 * Note that another thread may close file descriptor before we return
348 * from this function. We use the fact that now we do not refer
349 * to socket after mapping. If one day we will need it, this
350 * function will increment ref. count on file by 1.
352 * In any case returned fd MAY BE not valid!
353 * This race condition is unavoidable
354 * with shared fd spaces, we cannot solve it inside kernel,
355 * but we take care of internal coherence yet.
358 static int sock_alloc_file(struct socket *sock, struct file **f, int flags)
360 struct qstr name = { .name = "" };
365 fd = get_unused_fd_flags(flags);
366 if (unlikely(fd < 0))
369 path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name);
370 if (unlikely(!path.dentry)) {
374 path.mnt = mntget(sock_mnt);
376 path.dentry->d_op = &sockfs_dentry_operations;
378 * We dont want to push this dentry into global dentry hash table.
379 * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED
380 * This permits a working /proc/$pid/fd/XXX on sockets
382 path.dentry->d_flags &= ~DCACHE_UNHASHED;
383 d_instantiate(path.dentry, SOCK_INODE(sock));
384 SOCK_INODE(sock)->i_fop = &socket_file_ops;
386 file = alloc_file(&path, FMODE_READ | FMODE_WRITE,
388 if (unlikely(!file)) {
389 /* drop dentry, keep inode */
390 atomic_inc(&path.dentry->d_inode->i_count);
397 file->f_flags = O_RDWR | (flags & O_NONBLOCK);
399 file->private_data = sock;
405 int sock_map_fd(struct socket *sock, int flags)
407 struct file *newfile;
408 int fd = sock_alloc_file(sock, &newfile, flags);
411 fd_install(fd, newfile);
416 static struct socket *sock_from_file(struct file *file, int *err)
418 if (file->f_op == &socket_file_ops)
419 return file->private_data; /* set in sock_map_fd */
426 * sockfd_lookup - Go from a file number to its socket slot
428 * @err: pointer to an error code return
430 * The file handle passed in is locked and the socket it is bound
431 * too is returned. If an error occurs the err pointer is overwritten
432 * with a negative errno code and NULL is returned. The function checks
433 * for both invalid handles and passing a handle which is not a socket.
435 * On a success the socket object pointer is returned.
438 struct socket *sockfd_lookup(int fd, int *err)
449 sock = sock_from_file(file, err);
455 static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
461 file = fget_light(fd, fput_needed);
463 sock = sock_from_file(file, err);
466 fput_light(file, *fput_needed);
472 * sock_alloc - allocate a socket
474 * Allocate a new inode and socket object. The two are bound together
475 * and initialised. The socket is then returned. If we are out of inodes
479 static struct socket *sock_alloc(void)
484 inode = new_inode(sock_mnt->mnt_sb);
488 sock = SOCKET_I(inode);
490 kmemcheck_annotate_bitfield(sock, type);
491 inode->i_mode = S_IFSOCK | S_IRWXUGO;
492 inode->i_uid = current_fsuid();
493 inode->i_gid = current_fsgid();
495 percpu_add(sockets_in_use, 1);
500 * In theory you can't get an open on this inode, but /proc provides
501 * a back door. Remember to keep it shut otherwise you'll let the
502 * creepy crawlies in.
505 static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
510 const struct file_operations bad_sock_fops = {
511 .owner = THIS_MODULE,
512 .open = sock_no_open,
516 * sock_release - close a socket
517 * @sock: socket to close
519 * The socket is released from the protocol stack if it has a release
520 * callback, and the inode is then released if the socket is bound to
521 * an inode not a file.
524 void sock_release(struct socket *sock)
527 struct module *owner = sock->ops->owner;
529 sock->ops->release(sock);
534 if (sock->fasync_list)
535 printk(KERN_ERR "sock_release: fasync list not empty!\n");
537 percpu_sub(sockets_in_use, 1);
539 iput(SOCK_INODE(sock));
545 int sock_tx_timestamp(struct msghdr *msg, struct sock *sk,
546 union skb_shared_tx *shtx)
549 if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE))
551 if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE))
555 EXPORT_SYMBOL(sock_tx_timestamp);
557 static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
558 struct msghdr *msg, size_t size)
560 struct sock_iocb *si = kiocb_to_siocb(iocb);
568 err = security_socket_sendmsg(sock, msg, size);
572 return sock->ops->sendmsg(iocb, sock, msg, size);
575 int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
578 struct sock_iocb siocb;
581 init_sync_kiocb(&iocb, NULL);
582 iocb.private = &siocb;
583 ret = __sock_sendmsg(&iocb, sock, msg, size);
584 if (-EIOCBQUEUED == ret)
585 ret = wait_on_sync_kiocb(&iocb);
589 int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
590 struct kvec *vec, size_t num, size_t size)
592 mm_segment_t oldfs = get_fs();
597 * the following is safe, since for compiler definitions of kvec and
598 * iovec are identical, yielding the same in-core layout and alignment
600 msg->msg_iov = (struct iovec *)vec;
601 msg->msg_iovlen = num;
602 result = sock_sendmsg(sock, msg, size);
607 static int ktime2ts(ktime_t kt, struct timespec *ts)
610 *ts = ktime_to_timespec(kt);
618 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
620 void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
623 int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP);
624 struct timespec ts[3];
626 struct skb_shared_hwtstamps *shhwtstamps =
629 /* Race occurred between timestamp enabling and packet
630 receiving. Fill in the current time for now. */
631 if (need_software_tstamp && skb->tstamp.tv64 == 0)
632 __net_timestamp(skb);
634 if (need_software_tstamp) {
635 if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
637 skb_get_timestamp(skb, &tv);
638 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
642 skb_get_timestampns(skb, &ts);
643 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS,
649 memset(ts, 0, sizeof(ts));
650 if (skb->tstamp.tv64 &&
651 sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) {
652 skb_get_timestampns(skb, ts + 0);
656 if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) &&
657 ktime2ts(shhwtstamps->syststamp, ts + 1))
659 if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) &&
660 ktime2ts(shhwtstamps->hwtstamp, ts + 2))
664 put_cmsg(msg, SOL_SOCKET,
665 SCM_TIMESTAMPING, sizeof(ts), &ts);
668 EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
670 inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
672 if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount)
673 put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL,
674 sizeof(__u32), &skb->dropcount);
677 void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
680 sock_recv_timestamp(msg, sk, skb);
681 sock_recv_drops(msg, sk, skb);
683 EXPORT_SYMBOL_GPL(sock_recv_ts_and_drops);
685 static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock,
686 struct msghdr *msg, size_t size, int flags)
688 struct sock_iocb *si = kiocb_to_siocb(iocb);
696 return sock->ops->recvmsg(iocb, sock, msg, size, flags);
699 static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
700 struct msghdr *msg, size_t size, int flags)
702 int err = security_socket_recvmsg(sock, msg, size, flags);
704 return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags);
707 int sock_recvmsg(struct socket *sock, struct msghdr *msg,
708 size_t size, int flags)
711 struct sock_iocb siocb;
714 init_sync_kiocb(&iocb, NULL);
715 iocb.private = &siocb;
716 ret = __sock_recvmsg(&iocb, sock, msg, size, flags);
717 if (-EIOCBQUEUED == ret)
718 ret = wait_on_sync_kiocb(&iocb);
722 static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
723 size_t size, int flags)
726 struct sock_iocb siocb;
729 init_sync_kiocb(&iocb, NULL);
730 iocb.private = &siocb;
731 ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags);
732 if (-EIOCBQUEUED == ret)
733 ret = wait_on_sync_kiocb(&iocb);
737 int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
738 struct kvec *vec, size_t num, size_t size, int flags)
740 mm_segment_t oldfs = get_fs();
745 * the following is safe, since for compiler definitions of kvec and
746 * iovec are identical, yielding the same in-core layout and alignment
748 msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num;
749 result = sock_recvmsg(sock, msg, size, flags);
754 static void sock_aio_dtor(struct kiocb *iocb)
756 kfree(iocb->private);
759 static ssize_t sock_sendpage(struct file *file, struct page *page,
760 int offset, size_t size, loff_t *ppos, int more)
765 sock = file->private_data;
767 flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
771 return kernel_sendpage(sock, page, offset, size, flags);
774 static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
775 struct pipe_inode_info *pipe, size_t len,
778 struct socket *sock = file->private_data;
780 if (unlikely(!sock->ops->splice_read))
783 return sock->ops->splice_read(sock, ppos, pipe, len, flags);
786 static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
787 struct sock_iocb *siocb)
789 if (!is_sync_kiocb(iocb)) {
790 siocb = kmalloc(sizeof(*siocb), GFP_KERNEL);
793 iocb->ki_dtor = sock_aio_dtor;
797 iocb->private = siocb;
801 static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb,
802 struct file *file, const struct iovec *iov,
803 unsigned long nr_segs)
805 struct socket *sock = file->private_data;
809 for (i = 0; i < nr_segs; i++)
810 size += iov[i].iov_len;
812 msg->msg_name = NULL;
813 msg->msg_namelen = 0;
814 msg->msg_control = NULL;
815 msg->msg_controllen = 0;
816 msg->msg_iov = (struct iovec *)iov;
817 msg->msg_iovlen = nr_segs;
818 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
820 return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags);
823 static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
824 unsigned long nr_segs, loff_t pos)
826 struct sock_iocb siocb, *x;
831 if (iocb->ki_left == 0) /* Match SYS5 behaviour */
835 x = alloc_sock_iocb(iocb, &siocb);
838 return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
841 static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb,
842 struct file *file, const struct iovec *iov,
843 unsigned long nr_segs)
845 struct socket *sock = file->private_data;
849 for (i = 0; i < nr_segs; i++)
850 size += iov[i].iov_len;
852 msg->msg_name = NULL;
853 msg->msg_namelen = 0;
854 msg->msg_control = NULL;
855 msg->msg_controllen = 0;
856 msg->msg_iov = (struct iovec *)iov;
857 msg->msg_iovlen = nr_segs;
858 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
859 if (sock->type == SOCK_SEQPACKET)
860 msg->msg_flags |= MSG_EOR;
862 return __sock_sendmsg(iocb, sock, msg, size);
865 static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
866 unsigned long nr_segs, loff_t pos)
868 struct sock_iocb siocb, *x;
873 x = alloc_sock_iocb(iocb, &siocb);
877 return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
881 * Atomic setting of ioctl hooks to avoid race
882 * with module unload.
885 static DEFINE_MUTEX(br_ioctl_mutex);
886 static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL;
888 void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *))
890 mutex_lock(&br_ioctl_mutex);
891 br_ioctl_hook = hook;
892 mutex_unlock(&br_ioctl_mutex);
895 EXPORT_SYMBOL(brioctl_set);
897 static DEFINE_MUTEX(vlan_ioctl_mutex);
898 static int (*vlan_ioctl_hook) (struct net *, void __user *arg);
900 void vlan_ioctl_set(int (*hook) (struct net *, void __user *))
902 mutex_lock(&vlan_ioctl_mutex);
903 vlan_ioctl_hook = hook;
904 mutex_unlock(&vlan_ioctl_mutex);
907 EXPORT_SYMBOL(vlan_ioctl_set);
909 static DEFINE_MUTEX(dlci_ioctl_mutex);
910 static int (*dlci_ioctl_hook) (unsigned int, void __user *);
912 void dlci_ioctl_set(int (*hook) (unsigned int, void __user *))
914 mutex_lock(&dlci_ioctl_mutex);
915 dlci_ioctl_hook = hook;
916 mutex_unlock(&dlci_ioctl_mutex);
919 EXPORT_SYMBOL(dlci_ioctl_set);
921 static long sock_do_ioctl(struct net *net, struct socket *sock,
922 unsigned int cmd, unsigned long arg)
925 void __user *argp = (void __user *)arg;
927 err = sock->ops->ioctl(sock, cmd, arg);
930 * If this ioctl is unknown try to hand it down
933 if (err == -ENOIOCTLCMD)
934 err = dev_ioctl(net, cmd, argp);
940 * With an ioctl, arg may well be a user mode pointer, but we don't know
941 * what to do with it - that's up to the protocol still.
944 static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
948 void __user *argp = (void __user *)arg;
952 sock = file->private_data;
955 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
956 err = dev_ioctl(net, cmd, argp);
958 #ifdef CONFIG_WEXT_CORE
959 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
960 err = dev_ioctl(net, cmd, argp);
967 if (get_user(pid, (int __user *)argp))
969 err = f_setown(sock->file, pid, 1);
973 err = put_user(f_getown(sock->file),
982 request_module("bridge");
984 mutex_lock(&br_ioctl_mutex);
986 err = br_ioctl_hook(net, cmd, argp);
987 mutex_unlock(&br_ioctl_mutex);
992 if (!vlan_ioctl_hook)
993 request_module("8021q");
995 mutex_lock(&vlan_ioctl_mutex);
997 err = vlan_ioctl_hook(net, argp);
998 mutex_unlock(&vlan_ioctl_mutex);
1003 if (!dlci_ioctl_hook)
1004 request_module("dlci");
1006 mutex_lock(&dlci_ioctl_mutex);
1007 if (dlci_ioctl_hook)
1008 err = dlci_ioctl_hook(cmd, argp);
1009 mutex_unlock(&dlci_ioctl_mutex);
1012 err = sock_do_ioctl(net, sock, cmd, arg);
1018 int sock_create_lite(int family, int type, int protocol, struct socket **res)
1021 struct socket *sock = NULL;
1023 err = security_socket_create(family, type, protocol, 1);
1027 sock = sock_alloc();
1034 err = security_socket_post_create(sock, family, type, protocol, 1);
1047 /* No kernel lock held - perfect */
1048 static unsigned int sock_poll(struct file *file, poll_table *wait)
1050 struct socket *sock;
1053 * We can't return errors to poll, so it's either yes or no.
1055 sock = file->private_data;
1056 return sock->ops->poll(file, sock, wait);
1059 static int sock_mmap(struct file *file, struct vm_area_struct *vma)
1061 struct socket *sock = file->private_data;
1063 return sock->ops->mmap(file, sock, vma);
1066 static int sock_close(struct inode *inode, struct file *filp)
1069 * It was possible the inode is NULL we were
1070 * closing an unfinished socket.
1074 printk(KERN_DEBUG "sock_close: NULL inode\n");
1077 sock_release(SOCKET_I(inode));
1082 * Update the socket async list
1084 * Fasync_list locking strategy.
1086 * 1. fasync_list is modified only under process context socket lock
1087 * i.e. under semaphore.
1088 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
1089 * or under socket lock.
1090 * 3. fasync_list can be used from softirq context, so that
1091 * modification under socket lock have to be enhanced with
1092 * write_lock_bh(&sk->sk_callback_lock).
1096 static int sock_fasync(int fd, struct file *filp, int on)
1098 struct fasync_struct *fa, *fna = NULL, **prev;
1099 struct socket *sock;
1103 fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL);
1108 sock = filp->private_data;
1118 spin_lock(&filp->f_lock);
1120 filp->f_flags |= FASYNC;
1122 filp->f_flags &= ~FASYNC;
1123 spin_unlock(&filp->f_lock);
1125 prev = &(sock->fasync_list);
1127 for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev)
1128 if (fa->fa_file == filp)
1133 write_lock_bh(&sk->sk_callback_lock);
1135 write_unlock_bh(&sk->sk_callback_lock);
1140 fna->fa_file = filp;
1142 fna->magic = FASYNC_MAGIC;
1143 fna->fa_next = sock->fasync_list;
1144 write_lock_bh(&sk->sk_callback_lock);
1145 sock->fasync_list = fna;
1146 sock_set_flag(sk, SOCK_FASYNC);
1147 write_unlock_bh(&sk->sk_callback_lock);
1150 write_lock_bh(&sk->sk_callback_lock);
1151 *prev = fa->fa_next;
1152 if (!sock->fasync_list)
1153 sock_reset_flag(sk, SOCK_FASYNC);
1154 write_unlock_bh(&sk->sk_callback_lock);
1160 release_sock(sock->sk);
1164 /* This function may be called only under socket lock or callback_lock */
1166 int sock_wake_async(struct socket *sock, int how, int band)
1168 if (!sock || !sock->fasync_list)
1171 case SOCK_WAKE_WAITD:
1172 if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
1175 case SOCK_WAKE_SPACE:
1176 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
1181 __kill_fasync(sock->fasync_list, SIGIO, band);
1184 __kill_fasync(sock->fasync_list, SIGURG, band);
1189 static int __sock_create(struct net *net, int family, int type, int protocol,
1190 struct socket **res, int kern)
1193 struct socket *sock;
1194 const struct net_proto_family *pf;
1197 * Check protocol is in range
1199 if (family < 0 || family >= NPROTO)
1200 return -EAFNOSUPPORT;
1201 if (type < 0 || type >= SOCK_MAX)
1206 This uglymoron is moved from INET layer to here to avoid
1207 deadlock in module load.
1209 if (family == PF_INET && type == SOCK_PACKET) {
1213 printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1219 err = security_socket_create(family, type, protocol, kern);
1224 * Allocate the socket and allow the family to set things up. if
1225 * the protocol is 0, the family is instructed to select an appropriate
1228 sock = sock_alloc();
1230 if (net_ratelimit())
1231 printk(KERN_WARNING "socket: no more sockets\n");
1232 return -ENFILE; /* Not exactly a match, but its the
1233 closest posix thing */
1238 #ifdef CONFIG_MODULES
1239 /* Attempt to load a protocol module if the find failed.
1241 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
1242 * requested real, full-featured networking support upon configuration.
1243 * Otherwise module support will break!
1245 if (net_families[family] == NULL)
1246 request_module("net-pf-%d", family);
1250 pf = rcu_dereference(net_families[family]);
1251 err = -EAFNOSUPPORT;
1256 * We will call the ->create function, that possibly is in a loadable
1257 * module, so we have to bump that loadable module refcnt first.
1259 if (!try_module_get(pf->owner))
1262 /* Now protected by module ref count */
1265 err = pf->create(net, sock, protocol, kern);
1267 goto out_module_put;
1270 * Now to bump the refcnt of the [loadable] module that owns this
1271 * socket at sock_release time we decrement its refcnt.
1273 if (!try_module_get(sock->ops->owner))
1274 goto out_module_busy;
1277 * Now that we're done with the ->create function, the [loadable]
1278 * module can have its refcnt decremented
1280 module_put(pf->owner);
1281 err = security_socket_post_create(sock, family, type, protocol, kern);
1283 goto out_sock_release;
1289 err = -EAFNOSUPPORT;
1292 module_put(pf->owner);
1299 goto out_sock_release;
1302 int sock_create(int family, int type, int protocol, struct socket **res)
1304 return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0);
1307 int sock_create_kern(int family, int type, int protocol, struct socket **res)
1309 return __sock_create(&init_net, family, type, protocol, res, 1);
1312 SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol)
1315 struct socket *sock;
1318 /* Check the SOCK_* constants for consistency. */
1319 BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC);
1320 BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK);
1321 BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK);
1322 BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK);
1324 flags = type & ~SOCK_TYPE_MASK;
1325 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1327 type &= SOCK_TYPE_MASK;
1329 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1330 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1332 retval = sock_create(family, type, protocol, &sock);
1336 retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK));
1341 /* It may be already another descriptor 8) Not kernel problem. */
1350 * Create a pair of connected sockets.
1353 SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
1354 int __user *, usockvec)
1356 struct socket *sock1, *sock2;
1358 struct file *newfile1, *newfile2;
1361 flags = type & ~SOCK_TYPE_MASK;
1362 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1364 type &= SOCK_TYPE_MASK;
1366 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1367 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1370 * Obtain the first socket and check if the underlying protocol
1371 * supports the socketpair call.
1374 err = sock_create(family, type, protocol, &sock1);
1378 err = sock_create(family, type, protocol, &sock2);
1382 err = sock1->ops->socketpair(sock1, sock2);
1384 goto out_release_both;
1386 fd1 = sock_alloc_file(sock1, &newfile1, flags);
1387 if (unlikely(fd1 < 0)) {
1389 goto out_release_both;
1392 fd2 = sock_alloc_file(sock2, &newfile2, flags);
1393 if (unlikely(fd2 < 0)) {
1397 sock_release(sock2);
1401 audit_fd_pair(fd1, fd2);
1402 fd_install(fd1, newfile1);
1403 fd_install(fd2, newfile2);
1404 /* fd1 and fd2 may be already another descriptors.
1405 * Not kernel problem.
1408 err = put_user(fd1, &usockvec[0]);
1410 err = put_user(fd2, &usockvec[1]);
1419 sock_release(sock2);
1421 sock_release(sock1);
1427 * Bind a name to a socket. Nothing much to do here since it's
1428 * the protocol's responsibility to handle the local address.
1430 * We move the socket address to kernel space before we call
1431 * the protocol layer (having also checked the address is ok).
1434 SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen)
1436 struct socket *sock;
1437 struct sockaddr_storage address;
1438 int err, fput_needed;
1440 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1442 err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address);
1444 err = security_socket_bind(sock,
1445 (struct sockaddr *)&address,
1448 err = sock->ops->bind(sock,
1452 fput_light(sock->file, fput_needed);
1458 * Perform a listen. Basically, we allow the protocol to do anything
1459 * necessary for a listen, and if that works, we mark the socket as
1460 * ready for listening.
1463 SYSCALL_DEFINE2(listen, int, fd, int, backlog)
1465 struct socket *sock;
1466 int err, fput_needed;
1469 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1471 somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn;
1472 if ((unsigned)backlog > somaxconn)
1473 backlog = somaxconn;
1475 err = security_socket_listen(sock, backlog);
1477 err = sock->ops->listen(sock, backlog);
1479 fput_light(sock->file, fput_needed);
1485 * For accept, we attempt to create a new socket, set up the link
1486 * with the client, wake up the client, then return the new
1487 * connected fd. We collect the address of the connector in kernel
1488 * space and move it to user at the very end. This is unclean because
1489 * we open the socket then return an error.
1491 * 1003.1g adds the ability to recvmsg() to query connection pending
1492 * status to recvmsg. We need to add that support in a way thats
1493 * clean when we restucture accept also.
1496 SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
1497 int __user *, upeer_addrlen, int, flags)
1499 struct socket *sock, *newsock;
1500 struct file *newfile;
1501 int err, len, newfd, fput_needed;
1502 struct sockaddr_storage address;
1504 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1507 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1508 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1510 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1515 if (!(newsock = sock_alloc()))
1518 newsock->type = sock->type;
1519 newsock->ops = sock->ops;
1522 * We don't need try_module_get here, as the listening socket (sock)
1523 * has the protocol module (sock->ops->owner) held.
1525 __module_get(newsock->ops->owner);
1527 newfd = sock_alloc_file(newsock, &newfile, flags);
1528 if (unlikely(newfd < 0)) {
1530 sock_release(newsock);
1534 err = security_socket_accept(sock, newsock);
1538 err = sock->ops->accept(sock, newsock, sock->file->f_flags);
1542 if (upeer_sockaddr) {
1543 if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
1545 err = -ECONNABORTED;
1548 err = move_addr_to_user((struct sockaddr *)&address,
1549 len, upeer_sockaddr, upeer_addrlen);
1554 /* File flags are not inherited via accept() unlike another OSes. */
1556 fd_install(newfd, newfile);
1560 fput_light(sock->file, fput_needed);
1565 put_unused_fd(newfd);
1569 SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr,
1570 int __user *, upeer_addrlen)
1572 return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0);
1576 * Attempt to connect to a socket with the server address. The address
1577 * is in user space so we verify it is OK and move it to kernel space.
1579 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1582 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1583 * other SEQPACKET protocols that take time to connect() as it doesn't
1584 * include the -EINPROGRESS status for such sockets.
1587 SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
1590 struct socket *sock;
1591 struct sockaddr_storage address;
1592 int err, fput_needed;
1594 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1597 err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address);
1602 security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
1606 err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
1607 sock->file->f_flags);
1609 fput_light(sock->file, fput_needed);
1615 * Get the local address ('name') of a socket object. Move the obtained
1616 * name to user space.
1619 SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
1620 int __user *, usockaddr_len)
1622 struct socket *sock;
1623 struct sockaddr_storage address;
1624 int len, err, fput_needed;
1626 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1630 err = security_socket_getsockname(sock);
1634 err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0);
1637 err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len);
1640 fput_light(sock->file, fput_needed);
1646 * Get the remote address ('name') of a socket object. Move the obtained
1647 * name to user space.
1650 SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr,
1651 int __user *, usockaddr_len)
1653 struct socket *sock;
1654 struct sockaddr_storage address;
1655 int len, err, fput_needed;
1657 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1659 err = security_socket_getpeername(sock);
1661 fput_light(sock->file, fput_needed);
1666 sock->ops->getname(sock, (struct sockaddr *)&address, &len,
1669 err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr,
1671 fput_light(sock->file, fput_needed);
1677 * Send a datagram to a given address. We move the address into kernel
1678 * space and check the user space data area is readable before invoking
1682 SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
1683 unsigned, flags, struct sockaddr __user *, addr,
1686 struct socket *sock;
1687 struct sockaddr_storage address;
1693 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1697 iov.iov_base = buff;
1699 msg.msg_name = NULL;
1702 msg.msg_control = NULL;
1703 msg.msg_controllen = 0;
1704 msg.msg_namelen = 0;
1706 err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address);
1709 msg.msg_name = (struct sockaddr *)&address;
1710 msg.msg_namelen = addr_len;
1712 if (sock->file->f_flags & O_NONBLOCK)
1713 flags |= MSG_DONTWAIT;
1714 msg.msg_flags = flags;
1715 err = sock_sendmsg(sock, &msg, len);
1718 fput_light(sock->file, fput_needed);
1724 * Send a datagram down a socket.
1727 SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len,
1730 return sys_sendto(fd, buff, len, flags, NULL, 0);
1734 * Receive a frame from the socket and optionally record the address of the
1735 * sender. We verify the buffers are writable and if needed move the
1736 * sender address from kernel to user space.
1739 SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
1740 unsigned, flags, struct sockaddr __user *, addr,
1741 int __user *, addr_len)
1743 struct socket *sock;
1746 struct sockaddr_storage address;
1750 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1754 msg.msg_control = NULL;
1755 msg.msg_controllen = 0;
1759 iov.iov_base = ubuf;
1760 msg.msg_name = (struct sockaddr *)&address;
1761 msg.msg_namelen = sizeof(address);
1762 if (sock->file->f_flags & O_NONBLOCK)
1763 flags |= MSG_DONTWAIT;
1764 err = sock_recvmsg(sock, &msg, size, flags);
1766 if (err >= 0 && addr != NULL) {
1767 err2 = move_addr_to_user((struct sockaddr *)&address,
1768 msg.msg_namelen, addr, addr_len);
1773 fput_light(sock->file, fput_needed);
1779 * Receive a datagram from a socket.
1782 asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size,
1785 return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
1789 * Set a socket option. Because we don't know the option lengths we have
1790 * to pass the user mode parameter for the protocols to sort out.
1793 SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
1794 char __user *, optval, int, optlen)
1796 int err, fput_needed;
1797 struct socket *sock;
1802 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1804 err = security_socket_setsockopt(sock, level, optname);
1808 if (level == SOL_SOCKET)
1810 sock_setsockopt(sock, level, optname, optval,
1814 sock->ops->setsockopt(sock, level, optname, optval,
1817 fput_light(sock->file, fput_needed);
1823 * Get a socket option. Because we don't know the option lengths we have
1824 * to pass a user mode parameter for the protocols to sort out.
1827 SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
1828 char __user *, optval, int __user *, optlen)
1830 int err, fput_needed;
1831 struct socket *sock;
1833 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1835 err = security_socket_getsockopt(sock, level, optname);
1839 if (level == SOL_SOCKET)
1841 sock_getsockopt(sock, level, optname, optval,
1845 sock->ops->getsockopt(sock, level, optname, optval,
1848 fput_light(sock->file, fput_needed);
1854 * Shutdown a socket.
1857 SYSCALL_DEFINE2(shutdown, int, fd, int, how)
1859 int err, fput_needed;
1860 struct socket *sock;
1862 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1864 err = security_socket_shutdown(sock, how);
1866 err = sock->ops->shutdown(sock, how);
1867 fput_light(sock->file, fput_needed);
1872 /* A couple of helpful macros for getting the address of the 32/64 bit
1873 * fields which are the same type (int / unsigned) on our platforms.
1875 #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1876 #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1877 #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1880 * BSD sendmsg interface
1883 SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
1885 struct compat_msghdr __user *msg_compat =
1886 (struct compat_msghdr __user *)msg;
1887 struct socket *sock;
1888 struct sockaddr_storage address;
1889 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
1890 unsigned char ctl[sizeof(struct cmsghdr) + 20]
1891 __attribute__ ((aligned(sizeof(__kernel_size_t))));
1892 /* 20 is size of ipv6_pktinfo */
1893 unsigned char *ctl_buf = ctl;
1894 struct msghdr msg_sys;
1895 int err, ctl_len, iov_size, total_len;
1899 if (MSG_CMSG_COMPAT & flags) {
1900 if (get_compat_msghdr(&msg_sys, msg_compat))
1903 else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
1906 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1910 /* do not move before msg_sys is valid */
1912 if (msg_sys.msg_iovlen > UIO_MAXIOV)
1915 /* Check whether to allocate the iovec area */
1917 iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
1918 if (msg_sys.msg_iovlen > UIO_FASTIOV) {
1919 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
1924 /* This will also move the address data into kernel space */
1925 if (MSG_CMSG_COMPAT & flags) {
1926 err = verify_compat_iovec(&msg_sys, iov,
1927 (struct sockaddr *)&address,
1930 err = verify_iovec(&msg_sys, iov,
1931 (struct sockaddr *)&address,
1939 if (msg_sys.msg_controllen > INT_MAX)
1941 ctl_len = msg_sys.msg_controllen;
1942 if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
1944 cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl,
1948 ctl_buf = msg_sys.msg_control;
1949 ctl_len = msg_sys.msg_controllen;
1950 } else if (ctl_len) {
1951 if (ctl_len > sizeof(ctl)) {
1952 ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
1953 if (ctl_buf == NULL)
1958 * Careful! Before this, msg_sys.msg_control contains a user pointer.
1959 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
1960 * checking falls down on this.
1962 if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control,
1965 msg_sys.msg_control = ctl_buf;
1967 msg_sys.msg_flags = flags;
1969 if (sock->file->f_flags & O_NONBLOCK)
1970 msg_sys.msg_flags |= MSG_DONTWAIT;
1971 err = sock_sendmsg(sock, &msg_sys, total_len);
1975 sock_kfree_s(sock->sk, ctl_buf, ctl_len);
1977 if (iov != iovstack)
1978 sock_kfree_s(sock->sk, iov, iov_size);
1980 fput_light(sock->file, fput_needed);
1985 static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
1986 struct msghdr *msg_sys, unsigned flags, int nosec)
1988 struct compat_msghdr __user *msg_compat =
1989 (struct compat_msghdr __user *)msg;
1990 struct iovec iovstack[UIO_FASTIOV];
1991 struct iovec *iov = iovstack;
1992 unsigned long cmsg_ptr;
1993 int err, iov_size, total_len, len;
1995 /* kernel mode address */
1996 struct sockaddr_storage addr;
1998 /* user mode address pointers */
1999 struct sockaddr __user *uaddr;
2000 int __user *uaddr_len;
2002 if (MSG_CMSG_COMPAT & flags) {
2003 if (get_compat_msghdr(msg_sys, msg_compat))
2006 else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr)))
2010 if (msg_sys->msg_iovlen > UIO_MAXIOV)
2013 /* Check whether to allocate the iovec area */
2015 iov_size = msg_sys->msg_iovlen * sizeof(struct iovec);
2016 if (msg_sys->msg_iovlen > UIO_FASTIOV) {
2017 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
2023 * Save the user-mode address (verify_iovec will change the
2024 * kernel msghdr to use the kernel address space)
2027 uaddr = (__force void __user *)msg_sys->msg_name;
2028 uaddr_len = COMPAT_NAMELEN(msg);
2029 if (MSG_CMSG_COMPAT & flags) {
2030 err = verify_compat_iovec(msg_sys, iov,
2031 (struct sockaddr *)&addr,
2034 err = verify_iovec(msg_sys, iov,
2035 (struct sockaddr *)&addr,
2041 cmsg_ptr = (unsigned long)msg_sys->msg_control;
2042 msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
2044 if (sock->file->f_flags & O_NONBLOCK)
2045 flags |= MSG_DONTWAIT;
2046 err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
2052 if (uaddr != NULL) {
2053 err = move_addr_to_user((struct sockaddr *)&addr,
2054 msg_sys->msg_namelen, uaddr,
2059 err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
2063 if (MSG_CMSG_COMPAT & flags)
2064 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
2065 &msg_compat->msg_controllen);
2067 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
2068 &msg->msg_controllen);
2074 if (iov != iovstack)
2075 sock_kfree_s(sock->sk, iov, iov_size);
2081 * BSD recvmsg interface
2084 SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
2085 unsigned int, flags)
2087 int fput_needed, err;
2088 struct msghdr msg_sys;
2089 struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed);
2094 err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0);
2096 fput_light(sock->file, fput_needed);
2102 * Linux recvmmsg interface
2105 int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
2106 unsigned int flags, struct timespec *timeout)
2108 int fput_needed, err, datagrams;
2109 struct socket *sock;
2110 struct mmsghdr __user *entry;
2111 struct compat_mmsghdr __user *compat_entry;
2112 struct msghdr msg_sys;
2113 struct timespec end_time;
2116 poll_select_set_timeout(&end_time, timeout->tv_sec,
2122 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2126 err = sock_error(sock->sk);
2131 compat_entry = (struct compat_mmsghdr __user *)mmsg;
2133 while (datagrams < vlen) {
2135 * No need to ask LSM for more than the first datagram.
2137 if (MSG_CMSG_COMPAT & flags) {
2138 err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry,
2139 &msg_sys, flags, datagrams);
2142 err = __put_user(err, &compat_entry->msg_len);
2145 err = __sys_recvmsg(sock, (struct msghdr __user *)entry,
2146 &msg_sys, flags, datagrams);
2149 err = put_user(err, &entry->msg_len);
2158 ktime_get_ts(timeout);
2159 *timeout = timespec_sub(end_time, *timeout);
2160 if (timeout->tv_sec < 0) {
2161 timeout->tv_sec = timeout->tv_nsec = 0;
2165 /* Timeout, return less than vlen datagrams */
2166 if (timeout->tv_nsec == 0 && timeout->tv_sec == 0)
2170 /* Out of band data, return right away */
2171 if (msg_sys.msg_flags & MSG_OOB)
2176 fput_light(sock->file, fput_needed);
2181 if (datagrams != 0) {
2183 * We may return less entries than requested (vlen) if the
2184 * sock is non block and there aren't enough datagrams...
2186 if (err != -EAGAIN) {
2188 * ... or if recvmsg returns an error after we
2189 * received some datagrams, where we record the
2190 * error to return on the next call or if the
2191 * app asks about it using getsockopt(SO_ERROR).
2193 sock->sk->sk_err = -err;
2202 SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,
2203 unsigned int, vlen, unsigned int, flags,
2204 struct timespec __user *, timeout)
2207 struct timespec timeout_sys;
2210 return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL);
2212 if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys)))
2215 datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys);
2217 if (datagrams > 0 &&
2218 copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys)))
2219 datagrams = -EFAULT;
2224 #ifdef __ARCH_WANT_SYS_SOCKETCALL
2225 /* Argument list sizes for sys_socketcall */
2226 #define AL(x) ((x) * sizeof(unsigned long))
2227 static const unsigned char nargs[20] = {
2228 AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
2229 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
2230 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3),
2237 * System call vectors.
2239 * Argument checking cleaned up. Saved 20% in size.
2240 * This function doesn't need to set the kernel lock because
2241 * it is set by the callees.
2244 SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
2247 unsigned long a0, a1;
2251 if (call < 1 || call > SYS_RECVMMSG)
2255 if (len > sizeof(a))
2258 /* copy_from_user should be SMP safe. */
2259 if (copy_from_user(a, args, len))
2262 audit_socketcall(nargs[call] / sizeof(unsigned long), a);
2269 err = sys_socket(a0, a1, a[2]);
2272 err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
2275 err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]);
2278 err = sys_listen(a0, a1);
2281 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2282 (int __user *)a[2], 0);
2284 case SYS_GETSOCKNAME:
2286 sys_getsockname(a0, (struct sockaddr __user *)a1,
2287 (int __user *)a[2]);
2289 case SYS_GETPEERNAME:
2291 sys_getpeername(a0, (struct sockaddr __user *)a1,
2292 (int __user *)a[2]);
2294 case SYS_SOCKETPAIR:
2295 err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]);
2298 err = sys_send(a0, (void __user *)a1, a[2], a[3]);
2301 err = sys_sendto(a0, (void __user *)a1, a[2], a[3],
2302 (struct sockaddr __user *)a[4], a[5]);
2305 err = sys_recv(a0, (void __user *)a1, a[2], a[3]);
2308 err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
2309 (struct sockaddr __user *)a[4],
2310 (int __user *)a[5]);
2313 err = sys_shutdown(a0, a1);
2315 case SYS_SETSOCKOPT:
2316 err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]);
2318 case SYS_GETSOCKOPT:
2320 sys_getsockopt(a0, a1, a[2], (char __user *)a[3],
2321 (int __user *)a[4]);
2324 err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]);
2327 err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]);
2330 err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3],
2331 (struct timespec __user *)a[4]);
2334 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2335 (int __user *)a[2], a[3]);
2344 #endif /* __ARCH_WANT_SYS_SOCKETCALL */
2347 * sock_register - add a socket protocol handler
2348 * @ops: description of protocol
2350 * This function is called by a protocol handler that wants to
2351 * advertise its address family, and have it linked into the
2352 * socket interface. The value ops->family coresponds to the
2353 * socket system call protocol family.
2355 int sock_register(const struct net_proto_family *ops)
2359 if (ops->family >= NPROTO) {
2360 printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family,
2365 spin_lock(&net_family_lock);
2366 if (net_families[ops->family])
2369 net_families[ops->family] = ops;
2372 spin_unlock(&net_family_lock);
2374 printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family);
2379 * sock_unregister - remove a protocol handler
2380 * @family: protocol family to remove
2382 * This function is called by a protocol handler that wants to
2383 * remove its address family, and have it unlinked from the
2384 * new socket creation.
2386 * If protocol handler is a module, then it can use module reference
2387 * counts to protect against new references. If protocol handler is not
2388 * a module then it needs to provide its own protection in
2389 * the ops->create routine.
2391 void sock_unregister(int family)
2393 BUG_ON(family < 0 || family >= NPROTO);
2395 spin_lock(&net_family_lock);
2396 net_families[family] = NULL;
2397 spin_unlock(&net_family_lock);
2401 printk(KERN_INFO "NET: Unregistered protocol family %d\n", family);
2404 static int __init sock_init(void)
2407 * Initialize sock SLAB cache.
2413 * Initialize skbuff SLAB cache
2418 * Initialize the protocols module.
2422 register_filesystem(&sock_fs_type);
2423 sock_mnt = kern_mount(&sock_fs_type);
2425 /* The real protocol initialization is performed in later initcalls.
2428 #ifdef CONFIG_NETFILTER
2435 core_initcall(sock_init); /* early initcall */
2437 #ifdef CONFIG_PROC_FS
2438 void socket_seq_show(struct seq_file *seq)
2443 for_each_possible_cpu(cpu)
2444 counter += per_cpu(sockets_in_use, cpu);
2446 /* It can be negative, by the way. 8) */
2450 seq_printf(seq, "sockets: used %d\n", counter);
2452 #endif /* CONFIG_PROC_FS */
2454 #ifdef CONFIG_COMPAT
2455 static int do_siocgstamp(struct net *net, struct socket *sock,
2456 unsigned int cmd, struct compat_timeval __user *up)
2458 mm_segment_t old_fs = get_fs();
2463 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv);
2466 err = put_user(ktv.tv_sec, &up->tv_sec);
2467 err |= __put_user(ktv.tv_usec, &up->tv_usec);
2472 static int do_siocgstampns(struct net *net, struct socket *sock,
2473 unsigned int cmd, struct compat_timespec __user *up)
2475 mm_segment_t old_fs = get_fs();
2476 struct timespec kts;
2480 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts);
2483 err = put_user(kts.tv_sec, &up->tv_sec);
2484 err |= __put_user(kts.tv_nsec, &up->tv_nsec);
2489 static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32)
2491 struct ifreq __user *uifr;
2494 uifr = compat_alloc_user_space(sizeof(struct ifreq));
2495 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2498 err = dev_ioctl(net, SIOCGIFNAME, uifr);
2502 if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq)))
2508 static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
2510 struct compat_ifconf ifc32;
2512 struct ifconf __user *uifc;
2513 struct compat_ifreq __user *ifr32;
2514 struct ifreq __user *ifr;
2518 if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
2521 if (ifc32.ifcbuf == 0) {
2525 uifc = compat_alloc_user_space(sizeof(struct ifconf));
2527 size_t len =((ifc32.ifc_len / sizeof (struct compat_ifreq)) + 1) *
2528 sizeof (struct ifreq);
2529 uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
2531 ifr = ifc.ifc_req = (void __user *)(uifc + 1);
2532 ifr32 = compat_ptr(ifc32.ifcbuf);
2533 for (i = 0; i < ifc32.ifc_len; i += sizeof (struct compat_ifreq)) {
2534 if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq)))
2540 if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
2543 err = dev_ioctl(net, SIOCGIFCONF, uifc);
2547 if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
2551 ifr32 = compat_ptr(ifc32.ifcbuf);
2553 i + sizeof (struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len;
2554 i += sizeof (struct compat_ifreq), j += sizeof (struct ifreq)) {
2555 if (copy_in_user(ifr32, ifr, sizeof (struct compat_ifreq)))
2561 if (ifc32.ifcbuf == 0) {
2562 /* Translate from 64-bit structure multiple to
2566 i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq));
2571 if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
2577 static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
2579 struct ifreq __user *ifr;
2583 ifr = compat_alloc_user_space(sizeof(*ifr));
2585 if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2588 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2591 datap = compat_ptr(data);
2592 if (put_user(datap, &ifr->ifr_ifru.ifru_data))
2595 return dev_ioctl(net, SIOCETHTOOL, ifr);
2598 static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
2601 compat_uptr_t uptr32;
2602 struct ifreq __user *uifr;
2604 uifr = compat_alloc_user_space(sizeof (*uifr));
2605 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2608 if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
2611 uptr = compat_ptr(uptr32);
2613 if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc))
2616 return dev_ioctl(net, SIOCWANDEV, uifr);
2619 static int bond_ioctl(struct net *net, unsigned int cmd,
2620 struct compat_ifreq __user *ifr32)
2623 struct ifreq __user *uifr;
2624 mm_segment_t old_fs;
2630 case SIOCBONDENSLAVE:
2631 case SIOCBONDRELEASE:
2632 case SIOCBONDSETHWADDR:
2633 case SIOCBONDCHANGEACTIVE:
2634 if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq)))
2639 err = dev_ioctl(net, cmd, &kifr);
2643 case SIOCBONDSLAVEINFOQUERY:
2644 case SIOCBONDINFOQUERY:
2645 uifr = compat_alloc_user_space(sizeof(*uifr));
2646 if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2649 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2652 datap = compat_ptr(data);
2653 if (put_user(datap, &uifr->ifr_ifru.ifru_data))
2656 return dev_ioctl(net, cmd, uifr);
2662 static int siocdevprivate_ioctl(struct net *net, unsigned int cmd,
2663 struct compat_ifreq __user *u_ifreq32)
2665 struct ifreq __user *u_ifreq64;
2666 char tmp_buf[IFNAMSIZ];
2667 void __user *data64;
2670 if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
2673 if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
2675 data64 = compat_ptr(data32);
2677 u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
2679 /* Don't check these user accesses, just let that get trapped
2680 * in the ioctl handler instead.
2682 if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
2685 if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
2688 return dev_ioctl(net, cmd, u_ifreq64);
2691 static int dev_ifsioc(struct net *net, struct socket *sock,
2692 unsigned int cmd, struct compat_ifreq __user *uifr32)
2694 struct ifreq __user *uifr;
2697 uifr = compat_alloc_user_space(sizeof(*uifr));
2698 if (copy_in_user(uifr, uifr32, sizeof(*uifr32)))
2701 err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr);
2712 case SIOCGIFBRDADDR:
2713 case SIOCGIFDSTADDR:
2714 case SIOCGIFNETMASK:
2719 if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
2727 static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
2728 struct compat_ifreq __user *uifr32)
2731 struct compat_ifmap __user *uifmap32;
2732 mm_segment_t old_fs;
2735 uifmap32 = &uifr32->ifr_ifru.ifru_map;
2736 err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name));
2737 err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2738 err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2739 err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2740 err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq);
2741 err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma);
2742 err |= __get_user(ifr.ifr_map.port, &uifmap32->port);
2748 err = dev_ioctl(net, cmd, (void __user *)&ifr);
2751 if (cmd == SIOCGIFMAP && !err) {
2752 err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
2753 err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2754 err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2755 err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2756 err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq);
2757 err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma);
2758 err |= __put_user(ifr.ifr_map.port, &uifmap32->port);
2765 static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32)
2768 compat_uptr_t uptr32;
2769 struct ifreq __user *uifr;
2771 uifr = compat_alloc_user_space(sizeof (*uifr));
2772 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2775 if (get_user(uptr32, &uifr32->ifr_data))
2778 uptr = compat_ptr(uptr32);
2780 if (put_user(uptr, &uifr->ifr_data))
2783 return dev_ioctl(net, SIOCSHWTSTAMP, uifr);
2788 struct sockaddr rt_dst; /* target address */
2789 struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */
2790 struct sockaddr rt_genmask; /* target network mask (IP) */
2791 unsigned short rt_flags;
2794 unsigned char rt_tos;
2795 unsigned char rt_class;
2797 short rt_metric; /* +1 for binary compatibility! */
2798 /* char * */ u32 rt_dev; /* forcing the device at add */
2799 u32 rt_mtu; /* per route MTU/Window */
2800 u32 rt_window; /* Window clamping */
2801 unsigned short rt_irtt; /* Initial RTT */
2804 struct in6_rtmsg32 {
2805 struct in6_addr rtmsg_dst;
2806 struct in6_addr rtmsg_src;
2807 struct in6_addr rtmsg_gateway;
2817 static int routing_ioctl(struct net *net, struct socket *sock,
2818 unsigned int cmd, void __user *argp)
2822 struct in6_rtmsg r6;
2826 mm_segment_t old_fs = get_fs();
2828 if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */
2829 struct in6_rtmsg32 __user *ur6 = argp;
2830 ret = copy_from_user (&r6.rtmsg_dst, &(ur6->rtmsg_dst),
2831 3 * sizeof(struct in6_addr));
2832 ret |= __get_user (r6.rtmsg_type, &(ur6->rtmsg_type));
2833 ret |= __get_user (r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len));
2834 ret |= __get_user (r6.rtmsg_src_len, &(ur6->rtmsg_src_len));
2835 ret |= __get_user (r6.rtmsg_metric, &(ur6->rtmsg_metric));
2836 ret |= __get_user (r6.rtmsg_info, &(ur6->rtmsg_info));
2837 ret |= __get_user (r6.rtmsg_flags, &(ur6->rtmsg_flags));
2838 ret |= __get_user (r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex));
2842 struct rtentry32 __user *ur4 = argp;
2843 ret = copy_from_user (&r4.rt_dst, &(ur4->rt_dst),
2844 3 * sizeof(struct sockaddr));
2845 ret |= __get_user (r4.rt_flags, &(ur4->rt_flags));
2846 ret |= __get_user (r4.rt_metric, &(ur4->rt_metric));
2847 ret |= __get_user (r4.rt_mtu, &(ur4->rt_mtu));
2848 ret |= __get_user (r4.rt_window, &(ur4->rt_window));
2849 ret |= __get_user (r4.rt_irtt, &(ur4->rt_irtt));
2850 ret |= __get_user (rtdev, &(ur4->rt_dev));
2852 ret |= copy_from_user (devname, compat_ptr(rtdev), 15);
2853 r4.rt_dev = devname; devname[15] = 0;
2866 ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r);
2873 /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
2874 * for some operations; this forces use of the newer bridge-utils that
2875 * use compatiable ioctls
2877 static int old_bridge_ioctl(compat_ulong_t __user *argp)
2881 if (get_user(tmp, argp))
2883 if (tmp == BRCTL_GET_VERSION)
2884 return BRCTL_VERSION + 1;
2888 static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
2889 unsigned int cmd, unsigned long arg)
2891 void __user *argp = compat_ptr(arg);
2892 struct sock *sk = sock->sk;
2893 struct net *net = sock_net(sk);
2895 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
2896 return siocdevprivate_ioctl(net, cmd, argp);
2901 return old_bridge_ioctl(argp);
2903 return dev_ifname32(net, argp);
2905 return dev_ifconf(net, argp);
2907 return ethtool_ioctl(net, argp);
2909 return compat_siocwandev(net, argp);
2912 return compat_sioc_ifmap(net, cmd, argp);
2913 case SIOCBONDENSLAVE:
2914 case SIOCBONDRELEASE:
2915 case SIOCBONDSETHWADDR:
2916 case SIOCBONDSLAVEINFOQUERY:
2917 case SIOCBONDINFOQUERY:
2918 case SIOCBONDCHANGEACTIVE:
2919 return bond_ioctl(net, cmd, argp);
2922 return routing_ioctl(net, sock, cmd, argp);
2924 return do_siocgstamp(net, sock, cmd, argp);
2926 return do_siocgstampns(net, sock, cmd, argp);
2928 return compat_siocshwtstamp(net, argp);
2940 return sock_ioctl(file, cmd, arg);
2957 case SIOCSIFHWBROADCAST:
2959 case SIOCGIFBRDADDR:
2960 case SIOCSIFBRDADDR:
2961 case SIOCGIFDSTADDR:
2962 case SIOCSIFDSTADDR:
2963 case SIOCGIFNETMASK:
2964 case SIOCSIFNETMASK:
2975 return dev_ifsioc(net, sock, cmd, argp);
2981 return sock_do_ioctl(net, sock, cmd, arg);
2984 /* Prevent warning from compat_sys_ioctl, these always
2985 * result in -EINVAL in the native case anyway. */
2998 return -ENOIOCTLCMD;
3001 static long compat_sock_ioctl(struct file *file, unsigned cmd,
3004 struct socket *sock = file->private_data;
3005 int ret = -ENOIOCTLCMD;
3012 if (sock->ops->compat_ioctl)
3013 ret = sock->ops->compat_ioctl(sock, cmd, arg);
3015 if (ret == -ENOIOCTLCMD &&
3016 (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST))
3017 ret = compat_wext_handle_ioctl(net, cmd, arg);
3019 if (ret == -ENOIOCTLCMD)
3020 ret = compat_sock_ioctl_trans(file, sock, cmd, arg);
3026 int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
3028 return sock->ops->bind(sock, addr, addrlen);
3031 int kernel_listen(struct socket *sock, int backlog)
3033 return sock->ops->listen(sock, backlog);
3036 int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
3038 struct sock *sk = sock->sk;
3041 err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol,
3046 err = sock->ops->accept(sock, *newsock, flags);
3048 sock_release(*newsock);
3053 (*newsock)->ops = sock->ops;
3054 __module_get((*newsock)->ops->owner);
3060 int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
3063 return sock->ops->connect(sock, addr, addrlen, flags);
3066 int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
3069 return sock->ops->getname(sock, addr, addrlen, 0);
3072 int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
3075 return sock->ops->getname(sock, addr, addrlen, 1);
3078 int kernel_getsockopt(struct socket *sock, int level, int optname,
3079 char *optval, int *optlen)
3081 mm_segment_t oldfs = get_fs();
3085 if (level == SOL_SOCKET)
3086 err = sock_getsockopt(sock, level, optname, optval, optlen);
3088 err = sock->ops->getsockopt(sock, level, optname, optval,
3094 int kernel_setsockopt(struct socket *sock, int level, int optname,
3095 char *optval, unsigned int optlen)
3097 mm_segment_t oldfs = get_fs();
3101 if (level == SOL_SOCKET)
3102 err = sock_setsockopt(sock, level, optname, optval, optlen);
3104 err = sock->ops->setsockopt(sock, level, optname, optval,
3110 int kernel_sendpage(struct socket *sock, struct page *page, int offset,
3111 size_t size, int flags)
3113 if (sock->ops->sendpage)
3114 return sock->ops->sendpage(sock, page, offset, size, flags);
3116 return sock_no_sendpage(sock, page, offset, size, flags);
3119 int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
3121 mm_segment_t oldfs = get_fs();
3125 err = sock->ops->ioctl(sock, cmd, arg);
3131 int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
3133 return sock->ops->shutdown(sock, how);
3136 EXPORT_SYMBOL(sock_create);
3137 EXPORT_SYMBOL(sock_create_kern);
3138 EXPORT_SYMBOL(sock_create_lite);
3139 EXPORT_SYMBOL(sock_map_fd);
3140 EXPORT_SYMBOL(sock_recvmsg);
3141 EXPORT_SYMBOL(sock_register);
3142 EXPORT_SYMBOL(sock_release);
3143 EXPORT_SYMBOL(sock_sendmsg);
3144 EXPORT_SYMBOL(sock_unregister);
3145 EXPORT_SYMBOL(sock_wake_async);
3146 EXPORT_SYMBOL(sockfd_lookup);
3147 EXPORT_SYMBOL(kernel_sendmsg);
3148 EXPORT_SYMBOL(kernel_recvmsg);
3149 EXPORT_SYMBOL(kernel_bind);
3150 EXPORT_SYMBOL(kernel_listen);
3151 EXPORT_SYMBOL(kernel_accept);
3152 EXPORT_SYMBOL(kernel_connect);
3153 EXPORT_SYMBOL(kernel_getsockname);
3154 EXPORT_SYMBOL(kernel_getpeername);
3155 EXPORT_SYMBOL(kernel_getsockopt);
3156 EXPORT_SYMBOL(kernel_setsockopt);
3157 EXPORT_SYMBOL(kernel_sendpage);
3158 EXPORT_SYMBOL(kernel_sock_ioctl);
3159 EXPORT_SYMBOL(kernel_sock_shutdown);