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/atmdev.h>
104 #include <linux/atmarp.h>
105 #include <linux/atmsvc.h>
106 #include <linux/atmlec.h>
107 #include <linux/atmclip.h>
108 #include <linux/atmmpc.h>
109 #include <linux/atm_tcp.h>
110 #include <linux/sonet.h>
111 #include <linux/sockios.h>
112 #include <linux/atalk.h>
114 static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
115 static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
116 unsigned long nr_segs, loff_t pos);
117 static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
118 unsigned long nr_segs, loff_t pos);
119 static int sock_mmap(struct file *file, struct vm_area_struct *vma);
121 static int sock_close(struct inode *inode, struct file *file);
122 static unsigned int sock_poll(struct file *file,
123 struct poll_table_struct *wait);
124 static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
126 static long compat_sock_ioctl(struct file *file,
127 unsigned int cmd, unsigned long arg);
129 static int sock_fasync(int fd, struct file *filp, int on);
130 static ssize_t sock_sendpage(struct file *file, struct page *page,
131 int offset, size_t size, loff_t *ppos, int more);
132 static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
133 struct pipe_inode_info *pipe, size_t len,
137 * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear
138 * in the operation structures but are done directly via the socketcall() multiplexor.
141 static const struct file_operations socket_file_ops = {
142 .owner = THIS_MODULE,
144 .aio_read = sock_aio_read,
145 .aio_write = sock_aio_write,
147 .unlocked_ioctl = sock_ioctl,
149 .compat_ioctl = compat_sock_ioctl,
152 .open = sock_no_open, /* special open code to disallow open via /proc */
153 .release = sock_close,
154 .fasync = sock_fasync,
155 .sendpage = sock_sendpage,
156 .splice_write = generic_splice_sendpage,
157 .splice_read = sock_splice_read,
161 * The protocol list. Each protocol is registered in here.
164 static DEFINE_SPINLOCK(net_family_lock);
165 static const struct net_proto_family *net_families[NPROTO] __read_mostly;
168 * Statistics counters of the socket lists
171 static DEFINE_PER_CPU(int, sockets_in_use) = 0;
175 * Move socket addresses back and forth across the kernel/user
176 * divide and look after the messy bits.
179 #define MAX_SOCK_ADDR 128 /* 108 for Unix domain -
180 16 for IP, 16 for IPX,
183 must be at least one bigger than
184 the AF_UNIX size (see net/unix/af_unix.c
189 * move_addr_to_kernel - copy a socket address into kernel space
190 * @uaddr: Address in user space
191 * @kaddr: Address in kernel space
192 * @ulen: Length in user space
194 * The address is copied into kernel space. If the provided address is
195 * too long an error code of -EINVAL is returned. If the copy gives
196 * invalid addresses -EFAULT is returned. On a success 0 is returned.
199 int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr)
201 if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))
205 if (copy_from_user(kaddr, uaddr, ulen))
207 return audit_sockaddr(ulen, kaddr);
211 * move_addr_to_user - copy an address to user space
212 * @kaddr: kernel space address
213 * @klen: length of address in kernel
214 * @uaddr: user space address
215 * @ulen: pointer to user length field
217 * The value pointed to by ulen on entry is the buffer length available.
218 * This is overwritten with the buffer space used. -EINVAL is returned
219 * if an overlong buffer is specified or a negative buffer size. -EFAULT
220 * is returned if either the buffer or the length field are not
222 * After copying the data up to the limit the user specifies, the true
223 * length of the data is written over the length limit the user
224 * specified. Zero is returned for a success.
227 int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr,
233 err = get_user(len, ulen);
238 if (len < 0 || len > sizeof(struct sockaddr_storage))
241 if (audit_sockaddr(klen, kaddr))
243 if (copy_to_user(uaddr, kaddr, len))
247 * "fromlen shall refer to the value before truncation.."
250 return __put_user(klen, ulen);
253 static struct kmem_cache *sock_inode_cachep __read_mostly;
255 static struct inode *sock_alloc_inode(struct super_block *sb)
257 struct socket_alloc *ei;
259 ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
262 init_waitqueue_head(&ei->socket.wait);
264 ei->socket.fasync_list = NULL;
265 ei->socket.state = SS_UNCONNECTED;
266 ei->socket.flags = 0;
267 ei->socket.ops = NULL;
268 ei->socket.sk = NULL;
269 ei->socket.file = NULL;
271 return &ei->vfs_inode;
274 static void sock_destroy_inode(struct inode *inode)
276 kmem_cache_free(sock_inode_cachep,
277 container_of(inode, struct socket_alloc, vfs_inode));
280 static void init_once(void *foo)
282 struct socket_alloc *ei = (struct socket_alloc *)foo;
284 inode_init_once(&ei->vfs_inode);
287 static int init_inodecache(void)
289 sock_inode_cachep = kmem_cache_create("sock_inode_cache",
290 sizeof(struct socket_alloc),
292 (SLAB_HWCACHE_ALIGN |
293 SLAB_RECLAIM_ACCOUNT |
296 if (sock_inode_cachep == NULL)
301 static const struct super_operations sockfs_ops = {
302 .alloc_inode = sock_alloc_inode,
303 .destroy_inode =sock_destroy_inode,
304 .statfs = simple_statfs,
307 static int sockfs_get_sb(struct file_system_type *fs_type,
308 int flags, const char *dev_name, void *data,
309 struct vfsmount *mnt)
311 return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC,
315 static struct vfsmount *sock_mnt __read_mostly;
317 static struct file_system_type sock_fs_type = {
319 .get_sb = sockfs_get_sb,
320 .kill_sb = kill_anon_super,
323 static int sockfs_delete_dentry(struct dentry *dentry)
326 * At creation time, we pretended this dentry was hashed
327 * (by clearing DCACHE_UNHASHED bit in d_flags)
328 * At delete time, we restore the truth : not hashed.
329 * (so that dput() can proceed correctly)
331 dentry->d_flags |= DCACHE_UNHASHED;
336 * sockfs_dname() is called from d_path().
338 static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen)
340 return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]",
341 dentry->d_inode->i_ino);
344 static const struct dentry_operations sockfs_dentry_operations = {
345 .d_delete = sockfs_delete_dentry,
346 .d_dname = sockfs_dname,
350 * Obtains the first available file descriptor and sets it up for use.
352 * These functions create file structures and maps them to fd space
353 * of the current process. On success it returns file descriptor
354 * and file struct implicitly stored in sock->file.
355 * Note that another thread may close file descriptor before we return
356 * from this function. We use the fact that now we do not refer
357 * to socket after mapping. If one day we will need it, this
358 * function will increment ref. count on file by 1.
360 * In any case returned fd MAY BE not valid!
361 * This race condition is unavoidable
362 * with shared fd spaces, we cannot solve it inside kernel,
363 * but we take care of internal coherence yet.
366 static int sock_alloc_fd(struct file **filep, int flags)
370 fd = get_unused_fd_flags(flags);
371 if (likely(fd >= 0)) {
372 struct file *file = get_empty_filp();
375 if (unlikely(!file)) {
384 static int sock_attach_fd(struct socket *sock, struct file *file, int flags)
386 struct dentry *dentry;
387 struct qstr name = { .name = "" };
389 dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name);
390 if (unlikely(!dentry))
393 dentry->d_op = &sockfs_dentry_operations;
395 * We dont want to push this dentry into global dentry hash table.
396 * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED
397 * This permits a working /proc/$pid/fd/XXX on sockets
399 dentry->d_flags &= ~DCACHE_UNHASHED;
400 d_instantiate(dentry, SOCK_INODE(sock));
403 init_file(file, sock_mnt, dentry, FMODE_READ | FMODE_WRITE,
405 SOCK_INODE(sock)->i_fop = &socket_file_ops;
406 file->f_flags = O_RDWR | (flags & O_NONBLOCK);
408 file->private_data = sock;
413 int sock_map_fd(struct socket *sock, int flags)
415 struct file *newfile;
416 int fd = sock_alloc_fd(&newfile, flags);
418 if (likely(fd >= 0)) {
419 int err = sock_attach_fd(sock, newfile, flags);
421 if (unlikely(err < 0)) {
426 fd_install(fd, newfile);
431 static struct socket *sock_from_file(struct file *file, int *err)
433 if (file->f_op == &socket_file_ops)
434 return file->private_data; /* set in sock_map_fd */
441 * sockfd_lookup - Go from a file number to its socket slot
443 * @err: pointer to an error code return
445 * The file handle passed in is locked and the socket it is bound
446 * too is returned. If an error occurs the err pointer is overwritten
447 * with a negative errno code and NULL is returned. The function checks
448 * for both invalid handles and passing a handle which is not a socket.
450 * On a success the socket object pointer is returned.
453 struct socket *sockfd_lookup(int fd, int *err)
464 sock = sock_from_file(file, err);
470 static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
476 file = fget_light(fd, fput_needed);
478 sock = sock_from_file(file, err);
481 fput_light(file, *fput_needed);
487 * sock_alloc - allocate a socket
489 * Allocate a new inode and socket object. The two are bound together
490 * and initialised. The socket is then returned. If we are out of inodes
494 static struct socket *sock_alloc(void)
499 inode = new_inode(sock_mnt->mnt_sb);
503 sock = SOCKET_I(inode);
505 kmemcheck_annotate_bitfield(sock, type);
506 inode->i_mode = S_IFSOCK | S_IRWXUGO;
507 inode->i_uid = current_fsuid();
508 inode->i_gid = current_fsgid();
510 percpu_add(sockets_in_use, 1);
515 * In theory you can't get an open on this inode, but /proc provides
516 * a back door. Remember to keep it shut otherwise you'll let the
517 * creepy crawlies in.
520 static int sock_no_open(struct inode *irrelevant, struct file *dontcare)
525 const struct file_operations bad_sock_fops = {
526 .owner = THIS_MODULE,
527 .open = sock_no_open,
531 * sock_release - close a socket
532 * @sock: socket to close
534 * The socket is released from the protocol stack if it has a release
535 * callback, and the inode is then released if the socket is bound to
536 * an inode not a file.
539 void sock_release(struct socket *sock)
542 struct module *owner = sock->ops->owner;
544 sock->ops->release(sock);
549 if (sock->fasync_list)
550 printk(KERN_ERR "sock_release: fasync list not empty!\n");
552 percpu_sub(sockets_in_use, 1);
554 iput(SOCK_INODE(sock));
560 int sock_tx_timestamp(struct msghdr *msg, struct sock *sk,
561 union skb_shared_tx *shtx)
564 if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE))
566 if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE))
570 EXPORT_SYMBOL(sock_tx_timestamp);
572 static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock,
573 struct msghdr *msg, size_t size)
575 struct sock_iocb *si = kiocb_to_siocb(iocb);
583 err = security_socket_sendmsg(sock, msg, size);
587 return sock->ops->sendmsg(iocb, sock, msg, size);
590 int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
593 struct sock_iocb siocb;
596 init_sync_kiocb(&iocb, NULL);
597 iocb.private = &siocb;
598 ret = __sock_sendmsg(&iocb, sock, msg, size);
599 if (-EIOCBQUEUED == ret)
600 ret = wait_on_sync_kiocb(&iocb);
604 int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
605 struct kvec *vec, size_t num, size_t size)
607 mm_segment_t oldfs = get_fs();
612 * the following is safe, since for compiler definitions of kvec and
613 * iovec are identical, yielding the same in-core layout and alignment
615 msg->msg_iov = (struct iovec *)vec;
616 msg->msg_iovlen = num;
617 result = sock_sendmsg(sock, msg, size);
622 static int ktime2ts(ktime_t kt, struct timespec *ts)
625 *ts = ktime_to_timespec(kt);
633 * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP)
635 void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
638 int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP);
639 struct timespec ts[3];
641 struct skb_shared_hwtstamps *shhwtstamps =
644 /* Race occurred between timestamp enabling and packet
645 receiving. Fill in the current time for now. */
646 if (need_software_tstamp && skb->tstamp.tv64 == 0)
647 __net_timestamp(skb);
649 if (need_software_tstamp) {
650 if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) {
652 skb_get_timestamp(skb, &tv);
653 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP,
657 skb_get_timestampns(skb, &ts);
658 put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS,
664 memset(ts, 0, sizeof(ts));
665 if (skb->tstamp.tv64 &&
666 sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) {
667 skb_get_timestampns(skb, ts + 0);
671 if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) &&
672 ktime2ts(shhwtstamps->syststamp, ts + 1))
674 if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) &&
675 ktime2ts(shhwtstamps->hwtstamp, ts + 2))
679 put_cmsg(msg, SOL_SOCKET,
680 SCM_TIMESTAMPING, sizeof(ts), &ts);
683 EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
685 inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
687 if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount)
688 put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL,
689 sizeof(__u32), &skb->dropcount);
692 void sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk,
695 sock_recv_timestamp(msg, sk, skb);
696 sock_recv_drops(msg, sk, skb);
698 EXPORT_SYMBOL_GPL(sock_recv_ts_and_drops);
700 static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock,
701 struct msghdr *msg, size_t size, int flags)
703 struct sock_iocb *si = kiocb_to_siocb(iocb);
711 return sock->ops->recvmsg(iocb, sock, msg, size, flags);
714 static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock,
715 struct msghdr *msg, size_t size, int flags)
717 int err = security_socket_recvmsg(sock, msg, size, flags);
719 return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags);
722 int sock_recvmsg(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(&iocb, sock, msg, size, flags);
732 if (-EIOCBQUEUED == ret)
733 ret = wait_on_sync_kiocb(&iocb);
737 static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg,
738 size_t size, int flags)
741 struct sock_iocb siocb;
744 init_sync_kiocb(&iocb, NULL);
745 iocb.private = &siocb;
746 ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags);
747 if (-EIOCBQUEUED == ret)
748 ret = wait_on_sync_kiocb(&iocb);
752 int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
753 struct kvec *vec, size_t num, size_t size, int flags)
755 mm_segment_t oldfs = get_fs();
760 * the following is safe, since for compiler definitions of kvec and
761 * iovec are identical, yielding the same in-core layout and alignment
763 msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num;
764 result = sock_recvmsg(sock, msg, size, flags);
769 static void sock_aio_dtor(struct kiocb *iocb)
771 kfree(iocb->private);
774 static ssize_t sock_sendpage(struct file *file, struct page *page,
775 int offset, size_t size, loff_t *ppos, int more)
780 sock = file->private_data;
782 flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT;
786 return kernel_sendpage(sock, page, offset, size, flags);
789 static ssize_t sock_splice_read(struct file *file, loff_t *ppos,
790 struct pipe_inode_info *pipe, size_t len,
793 struct socket *sock = file->private_data;
795 if (unlikely(!sock->ops->splice_read))
798 return sock->ops->splice_read(sock, ppos, pipe, len, flags);
801 static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb,
802 struct sock_iocb *siocb)
804 if (!is_sync_kiocb(iocb)) {
805 siocb = kmalloc(sizeof(*siocb), GFP_KERNEL);
808 iocb->ki_dtor = sock_aio_dtor;
812 iocb->private = siocb;
816 static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb,
817 struct file *file, const struct iovec *iov,
818 unsigned long nr_segs)
820 struct socket *sock = file->private_data;
824 for (i = 0; i < nr_segs; i++)
825 size += iov[i].iov_len;
827 msg->msg_name = NULL;
828 msg->msg_namelen = 0;
829 msg->msg_control = NULL;
830 msg->msg_controllen = 0;
831 msg->msg_iov = (struct iovec *)iov;
832 msg->msg_iovlen = nr_segs;
833 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
835 return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags);
838 static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov,
839 unsigned long nr_segs, loff_t pos)
841 struct sock_iocb siocb, *x;
846 if (iocb->ki_left == 0) /* Match SYS5 behaviour */
850 x = alloc_sock_iocb(iocb, &siocb);
853 return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
856 static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb,
857 struct file *file, const struct iovec *iov,
858 unsigned long nr_segs)
860 struct socket *sock = file->private_data;
864 for (i = 0; i < nr_segs; i++)
865 size += iov[i].iov_len;
867 msg->msg_name = NULL;
868 msg->msg_namelen = 0;
869 msg->msg_control = NULL;
870 msg->msg_controllen = 0;
871 msg->msg_iov = (struct iovec *)iov;
872 msg->msg_iovlen = nr_segs;
873 msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0;
874 if (sock->type == SOCK_SEQPACKET)
875 msg->msg_flags |= MSG_EOR;
877 return __sock_sendmsg(iocb, sock, msg, size);
880 static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov,
881 unsigned long nr_segs, loff_t pos)
883 struct sock_iocb siocb, *x;
888 x = alloc_sock_iocb(iocb, &siocb);
892 return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs);
896 * Atomic setting of ioctl hooks to avoid race
897 * with module unload.
900 static DEFINE_MUTEX(br_ioctl_mutex);
901 static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL;
903 void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *))
905 mutex_lock(&br_ioctl_mutex);
906 br_ioctl_hook = hook;
907 mutex_unlock(&br_ioctl_mutex);
910 EXPORT_SYMBOL(brioctl_set);
912 static DEFINE_MUTEX(vlan_ioctl_mutex);
913 static int (*vlan_ioctl_hook) (struct net *, void __user *arg);
915 void vlan_ioctl_set(int (*hook) (struct net *, void __user *))
917 mutex_lock(&vlan_ioctl_mutex);
918 vlan_ioctl_hook = hook;
919 mutex_unlock(&vlan_ioctl_mutex);
922 EXPORT_SYMBOL(vlan_ioctl_set);
924 static DEFINE_MUTEX(dlci_ioctl_mutex);
925 static int (*dlci_ioctl_hook) (unsigned int, void __user *);
927 void dlci_ioctl_set(int (*hook) (unsigned int, void __user *))
929 mutex_lock(&dlci_ioctl_mutex);
930 dlci_ioctl_hook = hook;
931 mutex_unlock(&dlci_ioctl_mutex);
934 EXPORT_SYMBOL(dlci_ioctl_set);
936 static long sock_do_ioctl(struct net *net, struct socket *sock,
937 unsigned int cmd, unsigned long arg)
940 void __user *argp = (void __user *)arg;
942 err = sock->ops->ioctl(sock, cmd, arg);
945 * If this ioctl is unknown try to hand it down
948 if (err == -ENOIOCTLCMD)
949 err = dev_ioctl(net, cmd, argp);
955 * With an ioctl, arg may well be a user mode pointer, but we don't know
956 * what to do with it - that's up to the protocol still.
959 static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
963 void __user *argp = (void __user *)arg;
967 sock = file->private_data;
970 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
971 err = dev_ioctl(net, cmd, argp);
973 #ifdef CONFIG_WEXT_CORE
974 if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
975 err = dev_ioctl(net, cmd, argp);
982 if (get_user(pid, (int __user *)argp))
984 err = f_setown(sock->file, pid, 1);
988 err = put_user(f_getown(sock->file),
997 request_module("bridge");
999 mutex_lock(&br_ioctl_mutex);
1001 err = br_ioctl_hook(net, cmd, argp);
1002 mutex_unlock(&br_ioctl_mutex);
1007 if (!vlan_ioctl_hook)
1008 request_module("8021q");
1010 mutex_lock(&vlan_ioctl_mutex);
1011 if (vlan_ioctl_hook)
1012 err = vlan_ioctl_hook(net, argp);
1013 mutex_unlock(&vlan_ioctl_mutex);
1018 if (!dlci_ioctl_hook)
1019 request_module("dlci");
1021 mutex_lock(&dlci_ioctl_mutex);
1022 if (dlci_ioctl_hook)
1023 err = dlci_ioctl_hook(cmd, argp);
1024 mutex_unlock(&dlci_ioctl_mutex);
1027 err = sock_do_ioctl(net, sock, cmd, arg);
1033 int sock_create_lite(int family, int type, int protocol, struct socket **res)
1036 struct socket *sock = NULL;
1038 err = security_socket_create(family, type, protocol, 1);
1042 sock = sock_alloc();
1049 err = security_socket_post_create(sock, family, type, protocol, 1);
1062 /* No kernel lock held - perfect */
1063 static unsigned int sock_poll(struct file *file, poll_table *wait)
1065 struct socket *sock;
1068 * We can't return errors to poll, so it's either yes or no.
1070 sock = file->private_data;
1071 return sock->ops->poll(file, sock, wait);
1074 static int sock_mmap(struct file *file, struct vm_area_struct *vma)
1076 struct socket *sock = file->private_data;
1078 return sock->ops->mmap(file, sock, vma);
1081 static int sock_close(struct inode *inode, struct file *filp)
1084 * It was possible the inode is NULL we were
1085 * closing an unfinished socket.
1089 printk(KERN_DEBUG "sock_close: NULL inode\n");
1092 sock_release(SOCKET_I(inode));
1097 * Update the socket async list
1099 * Fasync_list locking strategy.
1101 * 1. fasync_list is modified only under process context socket lock
1102 * i.e. under semaphore.
1103 * 2. fasync_list is used under read_lock(&sk->sk_callback_lock)
1104 * or under socket lock.
1105 * 3. fasync_list can be used from softirq context, so that
1106 * modification under socket lock have to be enhanced with
1107 * write_lock_bh(&sk->sk_callback_lock).
1111 static int sock_fasync(int fd, struct file *filp, int on)
1113 struct fasync_struct *fa, *fna = NULL, **prev;
1114 struct socket *sock;
1118 fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL);
1123 sock = filp->private_data;
1133 spin_lock(&filp->f_lock);
1135 filp->f_flags |= FASYNC;
1137 filp->f_flags &= ~FASYNC;
1138 spin_unlock(&filp->f_lock);
1140 prev = &(sock->fasync_list);
1142 for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev)
1143 if (fa->fa_file == filp)
1148 write_lock_bh(&sk->sk_callback_lock);
1150 write_unlock_bh(&sk->sk_callback_lock);
1155 fna->fa_file = filp;
1157 fna->magic = FASYNC_MAGIC;
1158 fna->fa_next = sock->fasync_list;
1159 write_lock_bh(&sk->sk_callback_lock);
1160 sock->fasync_list = fna;
1161 sock_set_flag(sk, SOCK_FASYNC);
1162 write_unlock_bh(&sk->sk_callback_lock);
1165 write_lock_bh(&sk->sk_callback_lock);
1166 *prev = fa->fa_next;
1167 if (!sock->fasync_list)
1168 sock_reset_flag(sk, SOCK_FASYNC);
1169 write_unlock_bh(&sk->sk_callback_lock);
1175 release_sock(sock->sk);
1179 /* This function may be called only under socket lock or callback_lock */
1181 int sock_wake_async(struct socket *sock, int how, int band)
1183 if (!sock || !sock->fasync_list)
1186 case SOCK_WAKE_WAITD:
1187 if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags))
1190 case SOCK_WAKE_SPACE:
1191 if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags))
1196 __kill_fasync(sock->fasync_list, SIGIO, band);
1199 __kill_fasync(sock->fasync_list, SIGURG, band);
1204 static int __sock_create(struct net *net, int family, int type, int protocol,
1205 struct socket **res, int kern)
1208 struct socket *sock;
1209 const struct net_proto_family *pf;
1212 * Check protocol is in range
1214 if (family < 0 || family >= NPROTO)
1215 return -EAFNOSUPPORT;
1216 if (type < 0 || type >= SOCK_MAX)
1221 This uglymoron is moved from INET layer to here to avoid
1222 deadlock in module load.
1224 if (family == PF_INET && type == SOCK_PACKET) {
1228 printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n",
1234 err = security_socket_create(family, type, protocol, kern);
1239 * Allocate the socket and allow the family to set things up. if
1240 * the protocol is 0, the family is instructed to select an appropriate
1243 sock = sock_alloc();
1245 if (net_ratelimit())
1246 printk(KERN_WARNING "socket: no more sockets\n");
1247 return -ENFILE; /* Not exactly a match, but its the
1248 closest posix thing */
1253 #ifdef CONFIG_MODULES
1254 /* Attempt to load a protocol module if the find failed.
1256 * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user
1257 * requested real, full-featured networking support upon configuration.
1258 * Otherwise module support will break!
1260 if (net_families[family] == NULL)
1261 request_module("net-pf-%d", family);
1265 pf = rcu_dereference(net_families[family]);
1266 err = -EAFNOSUPPORT;
1271 * We will call the ->create function, that possibly is in a loadable
1272 * module, so we have to bump that loadable module refcnt first.
1274 if (!try_module_get(pf->owner))
1277 /* Now protected by module ref count */
1280 err = pf->create(net, sock, protocol, kern);
1282 goto out_module_put;
1285 * Now to bump the refcnt of the [loadable] module that owns this
1286 * socket at sock_release time we decrement its refcnt.
1288 if (!try_module_get(sock->ops->owner))
1289 goto out_module_busy;
1292 * Now that we're done with the ->create function, the [loadable]
1293 * module can have its refcnt decremented
1295 module_put(pf->owner);
1296 err = security_socket_post_create(sock, family, type, protocol, kern);
1298 goto out_sock_release;
1304 err = -EAFNOSUPPORT;
1307 module_put(pf->owner);
1314 goto out_sock_release;
1317 int sock_create(int family, int type, int protocol, struct socket **res)
1319 return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0);
1322 int sock_create_kern(int family, int type, int protocol, struct socket **res)
1324 return __sock_create(&init_net, family, type, protocol, res, 1);
1327 SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol)
1330 struct socket *sock;
1333 /* Check the SOCK_* constants for consistency. */
1334 BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC);
1335 BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK);
1336 BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK);
1337 BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK);
1339 flags = type & ~SOCK_TYPE_MASK;
1340 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1342 type &= SOCK_TYPE_MASK;
1344 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1345 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1347 retval = sock_create(family, type, protocol, &sock);
1351 retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK));
1356 /* It may be already another descriptor 8) Not kernel problem. */
1365 * Create a pair of connected sockets.
1368 SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
1369 int __user *, usockvec)
1371 struct socket *sock1, *sock2;
1373 struct file *newfile1, *newfile2;
1376 flags = type & ~SOCK_TYPE_MASK;
1377 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1379 type &= SOCK_TYPE_MASK;
1381 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1382 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1385 * Obtain the first socket and check if the underlying protocol
1386 * supports the socketpair call.
1389 err = sock_create(family, type, protocol, &sock1);
1393 err = sock_create(family, type, protocol, &sock2);
1397 err = sock1->ops->socketpair(sock1, sock2);
1399 goto out_release_both;
1401 fd1 = sock_alloc_fd(&newfile1, flags & O_CLOEXEC);
1402 if (unlikely(fd1 < 0)) {
1404 goto out_release_both;
1407 fd2 = sock_alloc_fd(&newfile2, flags & O_CLOEXEC);
1408 if (unlikely(fd2 < 0)) {
1412 goto out_release_both;
1415 err = sock_attach_fd(sock1, newfile1, flags & O_NONBLOCK);
1416 if (unlikely(err < 0)) {
1420 err = sock_attach_fd(sock2, newfile2, flags & O_NONBLOCK);
1421 if (unlikely(err < 0)) {
1426 audit_fd_pair(fd1, fd2);
1427 fd_install(fd1, newfile1);
1428 fd_install(fd2, newfile2);
1429 /* fd1 and fd2 may be already another descriptors.
1430 * Not kernel problem.
1433 err = put_user(fd1, &usockvec[0]);
1435 err = put_user(fd2, &usockvec[1]);
1444 sock_release(sock2);
1446 sock_release(sock1);
1452 sock_release(sock1);
1455 sock_release(sock2);
1462 * Bind a name to a socket. Nothing much to do here since it's
1463 * the protocol's responsibility to handle the local address.
1465 * We move the socket address to kernel space before we call
1466 * the protocol layer (having also checked the address is ok).
1469 SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen)
1471 struct socket *sock;
1472 struct sockaddr_storage address;
1473 int err, fput_needed;
1475 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1477 err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address);
1479 err = security_socket_bind(sock,
1480 (struct sockaddr *)&address,
1483 err = sock->ops->bind(sock,
1487 fput_light(sock->file, fput_needed);
1493 * Perform a listen. Basically, we allow the protocol to do anything
1494 * necessary for a listen, and if that works, we mark the socket as
1495 * ready for listening.
1498 SYSCALL_DEFINE2(listen, int, fd, int, backlog)
1500 struct socket *sock;
1501 int err, fput_needed;
1504 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1506 somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn;
1507 if ((unsigned)backlog > somaxconn)
1508 backlog = somaxconn;
1510 err = security_socket_listen(sock, backlog);
1512 err = sock->ops->listen(sock, backlog);
1514 fput_light(sock->file, fput_needed);
1520 * For accept, we attempt to create a new socket, set up the link
1521 * with the client, wake up the client, then return the new
1522 * connected fd. We collect the address of the connector in kernel
1523 * space and move it to user at the very end. This is unclean because
1524 * we open the socket then return an error.
1526 * 1003.1g adds the ability to recvmsg() to query connection pending
1527 * status to recvmsg. We need to add that support in a way thats
1528 * clean when we restucture accept also.
1531 SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
1532 int __user *, upeer_addrlen, int, flags)
1534 struct socket *sock, *newsock;
1535 struct file *newfile;
1536 int err, len, newfd, fput_needed;
1537 struct sockaddr_storage address;
1539 if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK))
1542 if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK))
1543 flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK;
1545 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1550 if (!(newsock = sock_alloc()))
1553 newsock->type = sock->type;
1554 newsock->ops = sock->ops;
1557 * We don't need try_module_get here, as the listening socket (sock)
1558 * has the protocol module (sock->ops->owner) held.
1560 __module_get(newsock->ops->owner);
1562 newfd = sock_alloc_fd(&newfile, flags & O_CLOEXEC);
1563 if (unlikely(newfd < 0)) {
1565 sock_release(newsock);
1569 err = sock_attach_fd(newsock, newfile, flags & O_NONBLOCK);
1573 err = security_socket_accept(sock, newsock);
1577 err = sock->ops->accept(sock, newsock, sock->file->f_flags);
1581 if (upeer_sockaddr) {
1582 if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
1584 err = -ECONNABORTED;
1587 err = move_addr_to_user((struct sockaddr *)&address,
1588 len, upeer_sockaddr, upeer_addrlen);
1593 /* File flags are not inherited via accept() unlike another OSes. */
1595 fd_install(newfd, newfile);
1599 fput_light(sock->file, fput_needed);
1603 sock_release(newsock);
1605 put_unused_fd(newfd);
1609 put_unused_fd(newfd);
1613 SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr,
1614 int __user *, upeer_addrlen)
1616 return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0);
1620 * Attempt to connect to a socket with the server address. The address
1621 * is in user space so we verify it is OK and move it to kernel space.
1623 * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to
1626 * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and
1627 * other SEQPACKET protocols that take time to connect() as it doesn't
1628 * include the -EINPROGRESS status for such sockets.
1631 SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr,
1634 struct socket *sock;
1635 struct sockaddr_storage address;
1636 int err, fput_needed;
1638 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1641 err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address);
1646 security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
1650 err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
1651 sock->file->f_flags);
1653 fput_light(sock->file, fput_needed);
1659 * Get the local address ('name') of a socket object. Move the obtained
1660 * name to user space.
1663 SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr,
1664 int __user *, usockaddr_len)
1666 struct socket *sock;
1667 struct sockaddr_storage address;
1668 int len, err, fput_needed;
1670 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1674 err = security_socket_getsockname(sock);
1678 err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0);
1681 err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len);
1684 fput_light(sock->file, fput_needed);
1690 * Get the remote address ('name') of a socket object. Move the obtained
1691 * name to user space.
1694 SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr,
1695 int __user *, usockaddr_len)
1697 struct socket *sock;
1698 struct sockaddr_storage address;
1699 int len, err, fput_needed;
1701 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1703 err = security_socket_getpeername(sock);
1705 fput_light(sock->file, fput_needed);
1710 sock->ops->getname(sock, (struct sockaddr *)&address, &len,
1713 err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr,
1715 fput_light(sock->file, fput_needed);
1721 * Send a datagram to a given address. We move the address into kernel
1722 * space and check the user space data area is readable before invoking
1726 SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len,
1727 unsigned, flags, struct sockaddr __user *, addr,
1730 struct socket *sock;
1731 struct sockaddr_storage address;
1737 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1741 iov.iov_base = buff;
1743 msg.msg_name = NULL;
1746 msg.msg_control = NULL;
1747 msg.msg_controllen = 0;
1748 msg.msg_namelen = 0;
1750 err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address);
1753 msg.msg_name = (struct sockaddr *)&address;
1754 msg.msg_namelen = addr_len;
1756 if (sock->file->f_flags & O_NONBLOCK)
1757 flags |= MSG_DONTWAIT;
1758 msg.msg_flags = flags;
1759 err = sock_sendmsg(sock, &msg, len);
1762 fput_light(sock->file, fput_needed);
1768 * Send a datagram down a socket.
1771 SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len,
1774 return sys_sendto(fd, buff, len, flags, NULL, 0);
1778 * Receive a frame from the socket and optionally record the address of the
1779 * sender. We verify the buffers are writable and if needed move the
1780 * sender address from kernel to user space.
1783 SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
1784 unsigned, flags, struct sockaddr __user *, addr,
1785 int __user *, addr_len)
1787 struct socket *sock;
1790 struct sockaddr_storage address;
1794 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1798 msg.msg_control = NULL;
1799 msg.msg_controllen = 0;
1803 iov.iov_base = ubuf;
1804 msg.msg_name = (struct sockaddr *)&address;
1805 msg.msg_namelen = sizeof(address);
1806 if (sock->file->f_flags & O_NONBLOCK)
1807 flags |= MSG_DONTWAIT;
1808 err = sock_recvmsg(sock, &msg, size, flags);
1810 if (err >= 0 && addr != NULL) {
1811 err2 = move_addr_to_user((struct sockaddr *)&address,
1812 msg.msg_namelen, addr, addr_len);
1817 fput_light(sock->file, fput_needed);
1823 * Receive a datagram from a socket.
1826 asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size,
1829 return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL);
1833 * Set a socket option. Because we don't know the option lengths we have
1834 * to pass the user mode parameter for the protocols to sort out.
1837 SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname,
1838 char __user *, optval, int, optlen)
1840 int err, fput_needed;
1841 struct socket *sock;
1846 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1848 err = security_socket_setsockopt(sock, level, optname);
1852 if (level == SOL_SOCKET)
1854 sock_setsockopt(sock, level, optname, optval,
1858 sock->ops->setsockopt(sock, level, optname, optval,
1861 fput_light(sock->file, fput_needed);
1867 * Get a socket option. Because we don't know the option lengths we have
1868 * to pass a user mode parameter for the protocols to sort out.
1871 SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname,
1872 char __user *, optval, int __user *, optlen)
1874 int err, fput_needed;
1875 struct socket *sock;
1877 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1879 err = security_socket_getsockopt(sock, level, optname);
1883 if (level == SOL_SOCKET)
1885 sock_getsockopt(sock, level, optname, optval,
1889 sock->ops->getsockopt(sock, level, optname, optval,
1892 fput_light(sock->file, fput_needed);
1898 * Shutdown a socket.
1901 SYSCALL_DEFINE2(shutdown, int, fd, int, how)
1903 int err, fput_needed;
1904 struct socket *sock;
1906 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1908 err = security_socket_shutdown(sock, how);
1910 err = sock->ops->shutdown(sock, how);
1911 fput_light(sock->file, fput_needed);
1916 /* A couple of helpful macros for getting the address of the 32/64 bit
1917 * fields which are the same type (int / unsigned) on our platforms.
1919 #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member)
1920 #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen)
1921 #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags)
1924 * BSD sendmsg interface
1927 SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
1929 struct compat_msghdr __user *msg_compat =
1930 (struct compat_msghdr __user *)msg;
1931 struct socket *sock;
1932 struct sockaddr_storage address;
1933 struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
1934 unsigned char ctl[sizeof(struct cmsghdr) + 20]
1935 __attribute__ ((aligned(sizeof(__kernel_size_t))));
1936 /* 20 is size of ipv6_pktinfo */
1937 unsigned char *ctl_buf = ctl;
1938 struct msghdr msg_sys;
1939 int err, ctl_len, iov_size, total_len;
1943 if (MSG_CMSG_COMPAT & flags) {
1944 if (get_compat_msghdr(&msg_sys, msg_compat))
1947 else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
1950 sock = sockfd_lookup_light(fd, &err, &fput_needed);
1954 /* do not move before msg_sys is valid */
1956 if (msg_sys.msg_iovlen > UIO_MAXIOV)
1959 /* Check whether to allocate the iovec area */
1961 iov_size = msg_sys.msg_iovlen * sizeof(struct iovec);
1962 if (msg_sys.msg_iovlen > UIO_FASTIOV) {
1963 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
1968 /* This will also move the address data into kernel space */
1969 if (MSG_CMSG_COMPAT & flags) {
1970 err = verify_compat_iovec(&msg_sys, iov,
1971 (struct sockaddr *)&address,
1974 err = verify_iovec(&msg_sys, iov,
1975 (struct sockaddr *)&address,
1983 if (msg_sys.msg_controllen > INT_MAX)
1985 ctl_len = msg_sys.msg_controllen;
1986 if ((MSG_CMSG_COMPAT & flags) && ctl_len) {
1988 cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl,
1992 ctl_buf = msg_sys.msg_control;
1993 ctl_len = msg_sys.msg_controllen;
1994 } else if (ctl_len) {
1995 if (ctl_len > sizeof(ctl)) {
1996 ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL);
1997 if (ctl_buf == NULL)
2002 * Careful! Before this, msg_sys.msg_control contains a user pointer.
2003 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
2004 * checking falls down on this.
2006 if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control,
2009 msg_sys.msg_control = ctl_buf;
2011 msg_sys.msg_flags = flags;
2013 if (sock->file->f_flags & O_NONBLOCK)
2014 msg_sys.msg_flags |= MSG_DONTWAIT;
2015 err = sock_sendmsg(sock, &msg_sys, total_len);
2019 sock_kfree_s(sock->sk, ctl_buf, ctl_len);
2021 if (iov != iovstack)
2022 sock_kfree_s(sock->sk, iov, iov_size);
2024 fput_light(sock->file, fput_needed);
2029 static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
2030 struct msghdr *msg_sys, unsigned flags, int nosec)
2032 struct compat_msghdr __user *msg_compat =
2033 (struct compat_msghdr __user *)msg;
2034 struct iovec iovstack[UIO_FASTIOV];
2035 struct iovec *iov = iovstack;
2036 unsigned long cmsg_ptr;
2037 int err, iov_size, total_len, len;
2039 /* kernel mode address */
2040 struct sockaddr_storage addr;
2042 /* user mode address pointers */
2043 struct sockaddr __user *uaddr;
2044 int __user *uaddr_len;
2046 if (MSG_CMSG_COMPAT & flags) {
2047 if (get_compat_msghdr(msg_sys, msg_compat))
2050 else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr)))
2054 if (msg_sys->msg_iovlen > UIO_MAXIOV)
2057 /* Check whether to allocate the iovec area */
2059 iov_size = msg_sys->msg_iovlen * sizeof(struct iovec);
2060 if (msg_sys->msg_iovlen > UIO_FASTIOV) {
2061 iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL);
2067 * Save the user-mode address (verify_iovec will change the
2068 * kernel msghdr to use the kernel address space)
2071 uaddr = (__force void __user *)msg_sys->msg_name;
2072 uaddr_len = COMPAT_NAMELEN(msg);
2073 if (MSG_CMSG_COMPAT & flags) {
2074 err = verify_compat_iovec(msg_sys, iov,
2075 (struct sockaddr *)&addr,
2078 err = verify_iovec(msg_sys, iov,
2079 (struct sockaddr *)&addr,
2085 cmsg_ptr = (unsigned long)msg_sys->msg_control;
2086 msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
2088 if (sock->file->f_flags & O_NONBLOCK)
2089 flags |= MSG_DONTWAIT;
2090 err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
2096 if (uaddr != NULL) {
2097 err = move_addr_to_user((struct sockaddr *)&addr,
2098 msg_sys->msg_namelen, uaddr,
2103 err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
2107 if (MSG_CMSG_COMPAT & flags)
2108 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
2109 &msg_compat->msg_controllen);
2111 err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
2112 &msg->msg_controllen);
2118 if (iov != iovstack)
2119 sock_kfree_s(sock->sk, iov, iov_size);
2125 * BSD recvmsg interface
2128 SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg,
2129 unsigned int, flags)
2131 int fput_needed, err;
2132 struct msghdr msg_sys;
2133 struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed);
2138 err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0);
2140 fput_light(sock->file, fput_needed);
2146 * Linux recvmmsg interface
2149 int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
2150 unsigned int flags, struct timespec *timeout)
2152 int fput_needed, err, datagrams;
2153 struct socket *sock;
2154 struct mmsghdr __user *entry;
2155 struct msghdr msg_sys;
2156 struct timespec end_time;
2159 poll_select_set_timeout(&end_time, timeout->tv_sec,
2165 sock = sockfd_lookup_light(fd, &err, &fput_needed);
2169 err = sock_error(sock->sk);
2175 while (datagrams < vlen) {
2177 * No need to ask LSM for more than the first datagram.
2179 err = __sys_recvmsg(sock, (struct msghdr __user *)entry,
2180 &msg_sys, flags, datagrams);
2183 err = put_user(err, &entry->msg_len);
2190 ktime_get_ts(timeout);
2191 *timeout = timespec_sub(end_time, *timeout);
2192 if (timeout->tv_sec < 0) {
2193 timeout->tv_sec = timeout->tv_nsec = 0;
2197 /* Timeout, return less than vlen datagrams */
2198 if (timeout->tv_nsec == 0 && timeout->tv_sec == 0)
2202 /* Out of band data, return right away */
2203 if (msg_sys.msg_flags & MSG_OOB)
2208 fput_light(sock->file, fput_needed);
2213 if (datagrams != 0) {
2215 * We may return less entries than requested (vlen) if the
2216 * sock is non block and there aren't enough datagrams...
2218 if (err != -EAGAIN) {
2220 * ... or if recvmsg returns an error after we
2221 * received some datagrams, where we record the
2222 * error to return on the next call or if the
2223 * app asks about it using getsockopt(SO_ERROR).
2225 sock->sk->sk_err = -err;
2234 SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg,
2235 unsigned int, vlen, unsigned int, flags,
2236 struct timespec __user *, timeout)
2239 struct timespec timeout_sys;
2242 return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL);
2244 if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys)))
2247 datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys);
2249 if (datagrams > 0 &&
2250 copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys)))
2251 datagrams = -EFAULT;
2256 #ifdef __ARCH_WANT_SYS_SOCKETCALL
2257 /* Argument list sizes for sys_socketcall */
2258 #define AL(x) ((x) * sizeof(unsigned long))
2259 static const unsigned char nargs[20] = {
2260 AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
2261 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
2262 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3),
2269 * System call vectors.
2271 * Argument checking cleaned up. Saved 20% in size.
2272 * This function doesn't need to set the kernel lock because
2273 * it is set by the callees.
2276 SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args)
2279 unsigned long a0, a1;
2283 if (call < 1 || call > SYS_RECVMMSG)
2287 if (len > sizeof(a))
2290 /* copy_from_user should be SMP safe. */
2291 if (copy_from_user(a, args, len))
2294 audit_socketcall(nargs[call] / sizeof(unsigned long), a);
2301 err = sys_socket(a0, a1, a[2]);
2304 err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]);
2307 err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]);
2310 err = sys_listen(a0, a1);
2313 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2314 (int __user *)a[2], 0);
2316 case SYS_GETSOCKNAME:
2318 sys_getsockname(a0, (struct sockaddr __user *)a1,
2319 (int __user *)a[2]);
2321 case SYS_GETPEERNAME:
2323 sys_getpeername(a0, (struct sockaddr __user *)a1,
2324 (int __user *)a[2]);
2326 case SYS_SOCKETPAIR:
2327 err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]);
2330 err = sys_send(a0, (void __user *)a1, a[2], a[3]);
2333 err = sys_sendto(a0, (void __user *)a1, a[2], a[3],
2334 (struct sockaddr __user *)a[4], a[5]);
2337 err = sys_recv(a0, (void __user *)a1, a[2], a[3]);
2340 err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3],
2341 (struct sockaddr __user *)a[4],
2342 (int __user *)a[5]);
2345 err = sys_shutdown(a0, a1);
2347 case SYS_SETSOCKOPT:
2348 err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]);
2350 case SYS_GETSOCKOPT:
2352 sys_getsockopt(a0, a1, a[2], (char __user *)a[3],
2353 (int __user *)a[4]);
2356 err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]);
2359 err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]);
2362 err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3],
2363 (struct timespec __user *)a[4]);
2366 err = sys_accept4(a0, (struct sockaddr __user *)a1,
2367 (int __user *)a[2], a[3]);
2376 #endif /* __ARCH_WANT_SYS_SOCKETCALL */
2379 * sock_register - add a socket protocol handler
2380 * @ops: description of protocol
2382 * This function is called by a protocol handler that wants to
2383 * advertise its address family, and have it linked into the
2384 * socket interface. The value ops->family coresponds to the
2385 * socket system call protocol family.
2387 int sock_register(const struct net_proto_family *ops)
2391 if (ops->family >= NPROTO) {
2392 printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family,
2397 spin_lock(&net_family_lock);
2398 if (net_families[ops->family])
2401 net_families[ops->family] = ops;
2404 spin_unlock(&net_family_lock);
2406 printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family);
2411 * sock_unregister - remove a protocol handler
2412 * @family: protocol family to remove
2414 * This function is called by a protocol handler that wants to
2415 * remove its address family, and have it unlinked from the
2416 * new socket creation.
2418 * If protocol handler is a module, then it can use module reference
2419 * counts to protect against new references. If protocol handler is not
2420 * a module then it needs to provide its own protection in
2421 * the ops->create routine.
2423 void sock_unregister(int family)
2425 BUG_ON(family < 0 || family >= NPROTO);
2427 spin_lock(&net_family_lock);
2428 net_families[family] = NULL;
2429 spin_unlock(&net_family_lock);
2433 printk(KERN_INFO "NET: Unregistered protocol family %d\n", family);
2436 static int __init sock_init(void)
2439 * Initialize sock SLAB cache.
2445 * Initialize skbuff SLAB cache
2450 * Initialize the protocols module.
2454 register_filesystem(&sock_fs_type);
2455 sock_mnt = kern_mount(&sock_fs_type);
2457 /* The real protocol initialization is performed in later initcalls.
2460 #ifdef CONFIG_NETFILTER
2467 core_initcall(sock_init); /* early initcall */
2469 #ifdef CONFIG_PROC_FS
2470 void socket_seq_show(struct seq_file *seq)
2475 for_each_possible_cpu(cpu)
2476 counter += per_cpu(sockets_in_use, cpu);
2478 /* It can be negative, by the way. 8) */
2482 seq_printf(seq, "sockets: used %d\n", counter);
2484 #endif /* CONFIG_PROC_FS */
2486 #ifdef CONFIG_COMPAT
2487 static int do_siocgstamp(struct net *net, struct socket *sock,
2488 unsigned int cmd, struct compat_timeval __user *up)
2490 mm_segment_t old_fs = get_fs();
2495 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv);
2498 err = put_user(ktv.tv_sec, &up->tv_sec);
2499 err |= __put_user(ktv.tv_usec, &up->tv_usec);
2504 static int do_siocgstampns(struct net *net, struct socket *sock,
2505 unsigned int cmd, struct compat_timespec __user *up)
2507 mm_segment_t old_fs = get_fs();
2508 struct timespec kts;
2512 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts);
2515 err = put_user(kts.tv_sec, &up->tv_sec);
2516 err |= __put_user(kts.tv_nsec, &up->tv_nsec);
2521 static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32)
2523 struct ifreq __user *uifr;
2526 uifr = compat_alloc_user_space(sizeof(struct ifreq));
2527 if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
2530 err = dev_ioctl(net, SIOCGIFNAME, uifr);
2534 if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq)))
2540 static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
2542 struct compat_ifconf ifc32;
2544 struct ifconf __user *uifc;
2545 struct compat_ifreq __user *ifr32;
2546 struct ifreq __user *ifr;
2550 if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
2553 if (ifc32.ifcbuf == 0) {
2557 uifc = compat_alloc_user_space(sizeof(struct ifconf));
2559 size_t len =((ifc32.ifc_len / sizeof (struct compat_ifreq)) + 1) *
2560 sizeof (struct ifreq);
2561 uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
2563 ifr = ifc.ifc_req = (void __user *)(uifc + 1);
2564 ifr32 = compat_ptr(ifc32.ifcbuf);
2565 for (i = 0; i < ifc32.ifc_len; i += sizeof (struct compat_ifreq)) {
2566 if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq)))
2572 if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
2575 err = dev_ioctl(net, SIOCGIFCONF, uifc);
2579 if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
2583 ifr32 = compat_ptr(ifc32.ifcbuf);
2585 i + sizeof (struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len;
2586 i += sizeof (struct compat_ifreq), j += sizeof (struct ifreq)) {
2587 if (copy_in_user(ifr32, ifr, sizeof (struct compat_ifreq)))
2593 if (ifc32.ifcbuf == 0) {
2594 /* Translate from 64-bit structure multiple to
2598 i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq));
2603 if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
2609 static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
2611 struct ifreq __user *ifr;
2615 ifr = compat_alloc_user_space(sizeof(*ifr));
2617 if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2620 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2623 datap = compat_ptr(data);
2624 if (put_user(datap, &ifr->ifr_ifru.ifru_data))
2627 return dev_ioctl(net, SIOCETHTOOL, ifr);
2630 static int bond_ioctl(struct net *net, unsigned int cmd,
2631 struct compat_ifreq __user *ifr32)
2634 struct ifreq __user *uifr;
2635 mm_segment_t old_fs;
2641 case SIOCBONDENSLAVE:
2642 case SIOCBONDRELEASE:
2643 case SIOCBONDSETHWADDR:
2644 case SIOCBONDCHANGEACTIVE:
2645 if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq)))
2650 err = dev_ioctl(net, cmd, &kifr);
2654 case SIOCBONDSLAVEINFOQUERY:
2655 case SIOCBONDINFOQUERY:
2656 uifr = compat_alloc_user_space(sizeof(*uifr));
2657 if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
2660 if (get_user(data, &ifr32->ifr_ifru.ifru_data))
2663 datap = compat_ptr(data);
2664 if (put_user(datap, &uifr->ifr_ifru.ifru_data))
2667 return dev_ioctl(net, cmd, uifr);
2673 static int siocdevprivate_ioctl(struct net *net, unsigned int cmd,
2674 struct compat_ifreq __user *u_ifreq32)
2676 struct ifreq __user *u_ifreq64;
2677 char tmp_buf[IFNAMSIZ];
2678 void __user *data64;
2681 if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
2684 if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
2686 data64 = compat_ptr(data32);
2688 u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
2690 /* Don't check these user accesses, just let that get trapped
2691 * in the ioctl handler instead.
2693 if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
2696 if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
2699 return dev_ioctl(net, cmd, u_ifreq64);
2702 static int dev_ifsioc(struct net *net, struct socket *sock,
2703 unsigned int cmd, struct compat_ifreq __user *uifr32)
2706 struct compat_ifmap __user *uifmap32;
2707 mm_segment_t old_fs;
2710 uifmap32 = &uifr32->ifr_ifru.ifru_map;
2713 err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name));
2714 err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2715 err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2716 err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2717 err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq);
2718 err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma);
2719 err |= __get_user(ifr.ifr_map.port, &uifmap32->port);
2724 if (copy_from_user(&ifr, uifr32, sizeof(*uifr32)))
2726 ifr.ifr_data = compat_ptr(uifr32->ifr_ifru.ifru_data);
2729 if (copy_from_user(&ifr, uifr32, sizeof(*uifr32)))
2735 err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ifr);
2746 case SIOCGIFBRDADDR:
2747 case SIOCGIFDSTADDR:
2748 case SIOCGIFNETMASK:
2750 if (copy_to_user(uifr32, &ifr, sizeof(*uifr32)))
2754 err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
2755 err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start);
2756 err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end);
2757 err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr);
2758 err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq);
2759 err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma);
2760 err |= __put_user(ifr.ifr_map.port, &uifmap32->port);
2771 struct sockaddr rt_dst; /* target address */
2772 struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */
2773 struct sockaddr rt_genmask; /* target network mask (IP) */
2774 unsigned short rt_flags;
2777 unsigned char rt_tos;
2778 unsigned char rt_class;
2780 short rt_metric; /* +1 for binary compatibility! */
2781 /* char * */ u32 rt_dev; /* forcing the device at add */
2782 u32 rt_mtu; /* per route MTU/Window */
2783 u32 rt_window; /* Window clamping */
2784 unsigned short rt_irtt; /* Initial RTT */
2787 struct in6_rtmsg32 {
2788 struct in6_addr rtmsg_dst;
2789 struct in6_addr rtmsg_src;
2790 struct in6_addr rtmsg_gateway;
2800 static int routing_ioctl(struct net *net, struct socket *sock,
2801 unsigned int cmd, void __user *argp)
2805 struct in6_rtmsg r6;
2809 mm_segment_t old_fs = get_fs();
2811 if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */
2812 struct in6_rtmsg32 __user *ur6 = argp;
2813 ret = copy_from_user (&r6.rtmsg_dst, &(ur6->rtmsg_dst),
2814 3 * sizeof(struct in6_addr));
2815 ret |= __get_user (r6.rtmsg_type, &(ur6->rtmsg_type));
2816 ret |= __get_user (r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len));
2817 ret |= __get_user (r6.rtmsg_src_len, &(ur6->rtmsg_src_len));
2818 ret |= __get_user (r6.rtmsg_metric, &(ur6->rtmsg_metric));
2819 ret |= __get_user (r6.rtmsg_info, &(ur6->rtmsg_info));
2820 ret |= __get_user (r6.rtmsg_flags, &(ur6->rtmsg_flags));
2821 ret |= __get_user (r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex));
2825 struct rtentry32 __user *ur4 = argp;
2826 ret = copy_from_user (&r4.rt_dst, &(ur4->rt_dst),
2827 3 * sizeof(struct sockaddr));
2828 ret |= __get_user (r4.rt_flags, &(ur4->rt_flags));
2829 ret |= __get_user (r4.rt_metric, &(ur4->rt_metric));
2830 ret |= __get_user (r4.rt_mtu, &(ur4->rt_mtu));
2831 ret |= __get_user (r4.rt_window, &(ur4->rt_window));
2832 ret |= __get_user (r4.rt_irtt, &(ur4->rt_irtt));
2833 ret |= __get_user (rtdev, &(ur4->rt_dev));
2835 ret |= copy_from_user (devname, compat_ptr(rtdev), 15);
2836 r4.rt_dev = devname; devname[15] = 0;
2849 ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r);
2856 /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
2857 * for some operations; this forces use of the newer bridge-utils that
2858 * use compatiable ioctls
2860 static int old_bridge_ioctl(compat_ulong_t __user *argp)
2864 if (get_user(tmp, argp))
2866 if (tmp == BRCTL_GET_VERSION)
2867 return BRCTL_VERSION + 1;
2871 struct atmif_sioc32 {
2872 compat_int_t number;
2873 compat_int_t length;
2877 struct atm_iobuf32 {
2878 compat_int_t length;
2879 compat_caddr_t buffer;
2882 #define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct atmif_sioc32)
2883 #define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct atm_iobuf32)
2884 #define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct atmif_sioc32)
2885 #define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct atmif_sioc32)
2886 #define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct atmif_sioc32)
2887 #define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct atmif_sioc32)
2888 #define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct atmif_sioc32)
2889 #define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct atmif_sioc32)
2890 #define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct atmif_sioc32)
2891 #define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct atmif_sioc32)
2892 #define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct atmif_sioc32)
2893 #define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct atmif_sioc32)
2894 #define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct atmif_sioc32)
2895 #define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct atmif_sioc32)
2896 #define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct atmif_sioc32)
2897 #define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct atmif_sioc32)
2898 #define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct atmif_sioc32)
2903 } atm_ioctl_map[] = {
2904 { ATM_GETLINKRATE32, ATM_GETLINKRATE },
2905 { ATM_GETNAMES32, ATM_GETNAMES },
2906 { ATM_GETTYPE32, ATM_GETTYPE },
2907 { ATM_GETESI32, ATM_GETESI },
2908 { ATM_GETADDR32, ATM_GETADDR },
2909 { ATM_RSTADDR32, ATM_RSTADDR },
2910 { ATM_ADDADDR32, ATM_ADDADDR },
2911 { ATM_DELADDR32, ATM_DELADDR },
2912 { ATM_GETCIRANGE32, ATM_GETCIRANGE },
2913 { ATM_SETCIRANGE32, ATM_SETCIRANGE },
2914 { ATM_SETESI32, ATM_SETESI },
2915 { ATM_SETESIF32, ATM_SETESIF },
2916 { ATM_GETSTAT32, ATM_GETSTAT },
2917 { ATM_GETSTATZ32, ATM_GETSTATZ },
2918 { ATM_GETLOOP32, ATM_GETLOOP },
2919 { ATM_SETLOOP32, ATM_SETLOOP },
2920 { ATM_QUERYLOOP32, ATM_QUERYLOOP }
2923 #define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
2925 static int do_atm_iobuf(struct net *net, struct socket *sock,
2926 unsigned int cmd, unsigned long arg)
2928 struct atm_iobuf __user *iobuf;
2929 struct atm_iobuf32 __user *iobuf32;
2934 iobuf = compat_alloc_user_space(sizeof(*iobuf));
2935 iobuf32 = compat_ptr(arg);
2937 if (get_user(len, &iobuf32->length) ||
2938 get_user(data, &iobuf32->buffer))
2940 datap = compat_ptr(data);
2941 if (put_user(len, &iobuf->length) ||
2942 put_user(datap, &iobuf->buffer))
2945 err = sock_do_ioctl(net, sock, cmd, (unsigned long)iobuf);
2948 if (copy_in_user(&iobuf32->length, &iobuf->length,
2956 static int do_atmif_sioc(struct net *net, struct socket *sock,
2957 unsigned int cmd, unsigned long arg)
2959 struct atmif_sioc __user *sioc;
2960 struct atmif_sioc32 __user *sioc32;
2965 sioc = compat_alloc_user_space(sizeof(*sioc));
2966 sioc32 = compat_ptr(arg);
2968 if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int)) ||
2969 get_user(data, &sioc32->arg))
2971 datap = compat_ptr(data);
2972 if (put_user(datap, &sioc->arg))
2975 err = sock_do_ioctl(net, sock, cmd, (unsigned long) sioc);
2978 if (copy_in_user(&sioc32->length, &sioc->length,
2985 static int do_atm_ioctl(struct net *net, struct socket *sock,
2986 unsigned int cmd32, unsigned long arg)
2989 unsigned int cmd = 0;
2993 case SONET_GETSTATZ:
2997 case SONET_SETFRAMING:
2998 case SONET_GETFRAMING:
2999 case SONET_GETFRSENSE:
3000 return do_atmif_sioc(net, sock, cmd32, arg);
3003 for (i = 0; i < NR_ATM_IOCTL; i++) {
3004 if (cmd32 == atm_ioctl_map[i].cmd32) {
3005 cmd = atm_ioctl_map[i].cmd;
3009 if (i == NR_ATM_IOCTL)
3014 return do_atm_iobuf(net, sock, cmd, arg);
3016 case ATM_GETLINKRATE:
3023 case ATM_GETCIRANGE:
3024 case ATM_SETCIRANGE:
3032 return do_atmif_sioc(net, sock, cmd, arg);
3038 static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
3039 unsigned int cmd, unsigned long arg)
3041 void __user *argp = compat_ptr(arg);
3042 struct sock *sk = sock->sk;
3043 struct net *net = sock_net(sk);
3045 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
3046 return siocdevprivate_ioctl(net, cmd, argp);
3051 return old_bridge_ioctl(argp);
3053 return dev_ifname32(net, argp);
3055 return dev_ifconf(net, argp);
3057 return ethtool_ioctl(net, argp);
3058 case SIOCBONDENSLAVE:
3059 case SIOCBONDRELEASE:
3060 case SIOCBONDSETHWADDR:
3061 case SIOCBONDSLAVEINFOQUERY:
3062 case SIOCBONDINFOQUERY:
3063 case SIOCBONDCHANGEACTIVE:
3064 return bond_ioctl(net, cmd, argp);
3067 return routing_ioctl(net, sock, cmd, argp);
3069 return do_siocgstamp(net, sock, cmd, argp);
3071 return do_siocgstampns(net, sock, cmd, argp);
3072 /* Note SIOCRTMSG is no longer, so this is safe and
3073 * the user would have seen just an -EINVAL anyways. */
3088 return sock_ioctl(file, cmd, arg);
3107 case SIOCSIFHWBROADCAST:
3110 /* case SIOCSARP: duplicate */
3111 /* case SIOCDARP: duplicate */
3112 case SIOCGIFBRDADDR:
3113 case SIOCSIFBRDADDR:
3114 case SIOCGIFDSTADDR:
3115 case SIOCSIFDSTADDR:
3116 case SIOCGIFNETMASK:
3117 case SIOCSIFNETMASK:
3124 return dev_ifsioc(net, sock, cmd, argp);
3125 case ATM_GETLINKRATE32:
3126 case ATM_GETNAMES32:
3133 case ATM_GETCIRANGE32:
3134 case ATM_SETCIRANGE32:
3138 case ATM_GETSTATZ32:
3141 case ATM_QUERYLOOP32:
3143 case SONET_GETSTATZ:
3147 case SONET_SETFRAMING:
3148 case SONET_GETFRAMING:
3149 case SONET_GETFRSENSE:
3150 return do_atm_ioctl(net, sock, cmd, arg);
3161 case ATMARP_SETENTRY:
3181 return sock_do_ioctl(net, sock, cmd, arg);
3184 return -ENOIOCTLCMD;
3187 static long compat_sock_ioctl(struct file *file, unsigned cmd,
3190 struct socket *sock = file->private_data;
3191 int ret = -ENOIOCTLCMD;
3198 if (sock->ops->compat_ioctl)
3199 ret = sock->ops->compat_ioctl(sock, cmd, arg);
3201 if (ret == -ENOIOCTLCMD &&
3202 (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST))
3203 ret = compat_wext_handle_ioctl(net, cmd, arg);
3205 if (ret == -ENOIOCTLCMD)
3206 ret = compat_sock_ioctl_trans(file, sock, cmd, arg);
3212 int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
3214 return sock->ops->bind(sock, addr, addrlen);
3217 int kernel_listen(struct socket *sock, int backlog)
3219 return sock->ops->listen(sock, backlog);
3222 int kernel_accept(struct socket *sock, struct socket **newsock, int flags)
3224 struct sock *sk = sock->sk;
3227 err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol,
3232 err = sock->ops->accept(sock, *newsock, flags);
3234 sock_release(*newsock);
3239 (*newsock)->ops = sock->ops;
3240 __module_get((*newsock)->ops->owner);
3246 int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
3249 return sock->ops->connect(sock, addr, addrlen, flags);
3252 int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
3255 return sock->ops->getname(sock, addr, addrlen, 0);
3258 int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
3261 return sock->ops->getname(sock, addr, addrlen, 1);
3264 int kernel_getsockopt(struct socket *sock, int level, int optname,
3265 char *optval, int *optlen)
3267 mm_segment_t oldfs = get_fs();
3271 if (level == SOL_SOCKET)
3272 err = sock_getsockopt(sock, level, optname, optval, optlen);
3274 err = sock->ops->getsockopt(sock, level, optname, optval,
3280 int kernel_setsockopt(struct socket *sock, int level, int optname,
3281 char *optval, unsigned int optlen)
3283 mm_segment_t oldfs = get_fs();
3287 if (level == SOL_SOCKET)
3288 err = sock_setsockopt(sock, level, optname, optval, optlen);
3290 err = sock->ops->setsockopt(sock, level, optname, optval,
3296 int kernel_sendpage(struct socket *sock, struct page *page, int offset,
3297 size_t size, int flags)
3299 if (sock->ops->sendpage)
3300 return sock->ops->sendpage(sock, page, offset, size, flags);
3302 return sock_no_sendpage(sock, page, offset, size, flags);
3305 int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
3307 mm_segment_t oldfs = get_fs();
3311 err = sock->ops->ioctl(sock, cmd, arg);
3317 int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
3319 return sock->ops->shutdown(sock, how);
3322 EXPORT_SYMBOL(sock_create);
3323 EXPORT_SYMBOL(sock_create_kern);
3324 EXPORT_SYMBOL(sock_create_lite);
3325 EXPORT_SYMBOL(sock_map_fd);
3326 EXPORT_SYMBOL(sock_recvmsg);
3327 EXPORT_SYMBOL(sock_register);
3328 EXPORT_SYMBOL(sock_release);
3329 EXPORT_SYMBOL(sock_sendmsg);
3330 EXPORT_SYMBOL(sock_unregister);
3331 EXPORT_SYMBOL(sock_wake_async);
3332 EXPORT_SYMBOL(sockfd_lookup);
3333 EXPORT_SYMBOL(kernel_sendmsg);
3334 EXPORT_SYMBOL(kernel_recvmsg);
3335 EXPORT_SYMBOL(kernel_bind);
3336 EXPORT_SYMBOL(kernel_listen);
3337 EXPORT_SYMBOL(kernel_accept);
3338 EXPORT_SYMBOL(kernel_connect);
3339 EXPORT_SYMBOL(kernel_getsockname);
3340 EXPORT_SYMBOL(kernel_getpeername);
3341 EXPORT_SYMBOL(kernel_getsockopt);
3342 EXPORT_SYMBOL(kernel_setsockopt);
3343 EXPORT_SYMBOL(kernel_sendpage);
3344 EXPORT_SYMBOL(kernel_sock_ioctl);
3345 EXPORT_SYMBOL(kernel_sock_shutdown);