Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NET An implementation of the SOCKET network access protocol. |
| 3 | * |
| 4 | * Version: @(#)socket.c 1.1.93 18/02/95 |
| 5 | * |
| 6 | * Authors: Orest Zborowski, <obz@Kodak.COM> |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 7 | * Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 9 | * |
| 10 | * Fixes: |
| 11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in |
| 12 | * shutdown() |
| 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 |
| 17 | * top level. |
| 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 |
| 22 | * tty drivers). |
| 23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) |
| 24 | * Jeff Uphoff : Made max number of sockets command-line |
| 25 | * configurable. |
| 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 |
| 34 | * stuff. |
| 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 |
| 40 | * moment. |
| 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) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | * protocol-independent |
| 47 | * |
| 48 | * |
| 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. |
| 53 | * |
| 54 | * |
| 55 | * This module is effectively the top level interface to the BSD socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 56 | * paradigm. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | * |
| 58 | * Based upon Swansea University Computer Society NET3.039 |
| 59 | */ |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include <linux/socket.h> |
| 63 | #include <linux/file.h> |
| 64 | #include <linux/net.h> |
| 65 | #include <linux/interrupt.h> |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 66 | #include <linux/thread_info.h> |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 67 | #include <linux/rcupdate.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #include <linux/netdevice.h> |
| 69 | #include <linux/proc_fs.h> |
| 70 | #include <linux/seq_file.h> |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 71 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #include <linux/wanrouter.h> |
| 73 | #include <linux/if_bridge.h> |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 74 | #include <linux/if_frad.h> |
| 75 | #include <linux/if_vlan.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 86 | #include <linux/audit.h> |
Adrian Bunk | d86b5e0 | 2006-01-21 00:46:55 +0100 | [diff] [blame] | 87 | #include <linux/wireless.h> |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 88 | #include <linux/nsproxy.h> |
Nick Black | 1fd7317d | 2009-09-22 16:43:33 -0700 | [diff] [blame] | 89 | #include <linux/magic.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 90 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | #include <asm/uaccess.h> |
| 93 | #include <asm/unistd.h> |
| 94 | |
| 95 | #include <net/compat.h> |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 96 | #include <net/wext.h> |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 97 | #include <net/cls_cgroup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | #include <net/sock.h> |
| 100 | #include <linux/netfilter.h> |
| 101 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 102 | #include <linux/if_tun.h> |
| 103 | #include <linux/ipv6_route.h> |
| 104 | #include <linux/route.h> |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 105 | #include <linux/sockios.h> |
| 106 | #include <linux/atalk.h> |
| 107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 109 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 110 | unsigned long nr_segs, loff_t pos); |
| 111 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 112 | unsigned long nr_segs, loff_t pos); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 113 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
| 115 | static int sock_close(struct inode *inode, struct file *file); |
| 116 | static unsigned int sock_poll(struct file *file, |
| 117 | struct poll_table_struct *wait); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 118 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 119 | #ifdef CONFIG_COMPAT |
| 120 | static long compat_sock_ioctl(struct file *file, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 121 | unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 122 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | static int sock_fasync(int fd, struct file *filp, int on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 125 | int offset, size_t size, loff_t *ppos, int more); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 126 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 127 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 128 | unsigned int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | /* |
| 131 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear |
| 132 | * in the operation structures but are done directly via the socketcall() multiplexor. |
| 133 | */ |
| 134 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 135 | static const struct file_operations socket_file_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | .owner = THIS_MODULE, |
| 137 | .llseek = no_llseek, |
| 138 | .aio_read = sock_aio_read, |
| 139 | .aio_write = sock_aio_write, |
| 140 | .poll = sock_poll, |
| 141 | .unlocked_ioctl = sock_ioctl, |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 142 | #ifdef CONFIG_COMPAT |
| 143 | .compat_ioctl = compat_sock_ioctl, |
| 144 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | .mmap = sock_mmap, |
| 146 | .open = sock_no_open, /* special open code to disallow open via /proc */ |
| 147 | .release = sock_close, |
| 148 | .fasync = sock_fasync, |
Jens Axboe | 5274f05 | 2006-03-30 15:15:30 +0200 | [diff] [blame] | 149 | .sendpage = sock_sendpage, |
| 150 | .splice_write = generic_splice_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 151 | .splice_read = sock_splice_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | }; |
| 153 | |
| 154 | /* |
| 155 | * The protocol list. Each protocol is registered in here. |
| 156 | */ |
| 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | static DEFINE_SPINLOCK(net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 159 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | /* |
| 162 | * Statistics counters of the socket lists |
| 163 | */ |
| 164 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 165 | static DEFINE_PER_CPU(int, sockets_in_use); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
| 167 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 168 | * Support routines. |
| 169 | * Move socket addresses back and forth across the kernel/user |
| 170 | * divide and look after the messy bits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | */ |
| 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | /** |
| 174 | * move_addr_to_kernel - copy a socket address into kernel space |
| 175 | * @uaddr: Address in user space |
| 176 | * @kaddr: Address in kernel space |
| 177 | * @ulen: Length in user space |
| 178 | * |
| 179 | * The address is copied into kernel space. If the provided address is |
| 180 | * too long an error code of -EINVAL is returned. If the copy gives |
| 181 | * invalid addresses -EFAULT is returned. On a success 0 is returned. |
| 182 | */ |
| 183 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 184 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 186 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 188 | if (ulen == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | return 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 190 | if (copy_from_user(kaddr, uaddr, ulen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 192 | return audit_sockaddr(ulen, kaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /** |
| 196 | * move_addr_to_user - copy an address to user space |
| 197 | * @kaddr: kernel space address |
| 198 | * @klen: length of address in kernel |
| 199 | * @uaddr: user space address |
| 200 | * @ulen: pointer to user length field |
| 201 | * |
| 202 | * The value pointed to by ulen on entry is the buffer length available. |
| 203 | * This is overwritten with the buffer space used. -EINVAL is returned |
| 204 | * if an overlong buffer is specified or a negative buffer size. -EFAULT |
| 205 | * is returned if either the buffer or the length field are not |
| 206 | * accessible. |
| 207 | * After copying the data up to the limit the user specifies, the true |
| 208 | * length of the data is written over the length limit the user |
| 209 | * specified. Zero is returned for a success. |
| 210 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 211 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 212 | static int move_addr_to_user(struct sockaddr *kaddr, int klen, |
| 213 | void __user *uaddr, int __user *ulen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { |
| 215 | int err; |
| 216 | int len; |
| 217 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 218 | err = get_user(len, ulen); |
| 219 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 221 | if (len > klen) |
| 222 | len = klen; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 223 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 225 | if (len) { |
Steve Grubb | d6fe394 | 2006-03-30 12:20:22 -0500 | [diff] [blame] | 226 | if (audit_sockaddr(klen, kaddr)) |
| 227 | return -ENOMEM; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 228 | if (copy_to_user(uaddr, kaddr, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | return -EFAULT; |
| 230 | } |
| 231 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 232 | * "fromlen shall refer to the value before truncation.." |
| 233 | * 1003.1g |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | */ |
| 235 | return __put_user(klen, ulen); |
| 236 | } |
| 237 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 238 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
| 240 | static struct inode *sock_alloc_inode(struct super_block *sb) |
| 241 | { |
| 242 | struct socket_alloc *ei; |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 243 | struct socket_wq *wq; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 244 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 245 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | if (!ei) |
| 247 | return NULL; |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 248 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
| 249 | if (!wq) { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 250 | kmem_cache_free(sock_inode_cachep, ei); |
| 251 | return NULL; |
| 252 | } |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 253 | init_waitqueue_head(&wq->wait); |
| 254 | wq->fasync_list = NULL; |
| 255 | RCU_INIT_POINTER(ei->socket.wq, wq); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | |
| 263 | return &ei->vfs_inode; |
| 264 | } |
| 265 | |
| 266 | static void sock_destroy_inode(struct inode *inode) |
| 267 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 268 | struct socket_alloc *ei; |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 269 | struct socket_wq *wq; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 270 | |
| 271 | ei = container_of(inode, struct socket_alloc, vfs_inode); |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 272 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
Lai Jiangshan | 6184522 | 2011-03-18 12:10:25 +0800 | [diff] [blame] | 273 | kfree_rcu(wq, rcu); |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 274 | kmem_cache_free(sock_inode_cachep, ei); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 277 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 279 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 281 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | static int init_inodecache(void) |
| 285 | { |
| 286 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 287 | sizeof(struct socket_alloc), |
| 288 | 0, |
| 289 | (SLAB_HWCACHE_ALIGN | |
| 290 | SLAB_RECLAIM_ACCOUNT | |
| 291 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 292 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | if (sock_inode_cachep == NULL) |
| 294 | return -ENOMEM; |
| 295 | return 0; |
| 296 | } |
| 297 | |
Alexey Dobriyan | b87221d | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 298 | static const struct super_operations sockfs_ops = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 299 | .alloc_inode = sock_alloc_inode, |
| 300 | .destroy_inode = sock_destroy_inode, |
| 301 | .statfs = simple_statfs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | }; |
| 303 | |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 304 | /* |
| 305 | * sockfs_dname() is called from d_path(). |
| 306 | */ |
| 307 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) |
| 308 | { |
| 309 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", |
| 310 | dentry->d_inode->i_ino); |
| 311 | } |
| 312 | |
Al Viro | 3ba13d1 | 2009-02-20 06:02:22 +0000 | [diff] [blame] | 313 | static const struct dentry_operations sockfs_dentry_operations = { |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 314 | .d_dname = sockfs_dname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | }; |
| 316 | |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 317 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
| 318 | int flags, const char *dev_name, void *data) |
| 319 | { |
| 320 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, |
| 321 | &sockfs_dentry_operations, SOCKFS_MAGIC); |
| 322 | } |
| 323 | |
| 324 | static struct vfsmount *sock_mnt __read_mostly; |
| 325 | |
| 326 | static struct file_system_type sock_fs_type = { |
| 327 | .name = "sockfs", |
| 328 | .mount = sockfs_mount, |
| 329 | .kill_sb = kill_anon_super, |
| 330 | }; |
| 331 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | /* |
| 333 | * Obtains the first available file descriptor and sets it up for use. |
| 334 | * |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 335 | * These functions create file structures and maps them to fd space |
| 336 | * of the current process. On success it returns file descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | * and file struct implicitly stored in sock->file. |
| 338 | * Note that another thread may close file descriptor before we return |
| 339 | * from this function. We use the fact that now we do not refer |
| 340 | * to socket after mapping. If one day we will need it, this |
| 341 | * function will increment ref. count on file by 1. |
| 342 | * |
| 343 | * In any case returned fd MAY BE not valid! |
| 344 | * This race condition is unavoidable |
| 345 | * with shared fd spaces, we cannot solve it inside kernel, |
| 346 | * but we take care of internal coherence yet. |
| 347 | */ |
| 348 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 349 | static int sock_alloc_file(struct socket *sock, struct file **f, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | { |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 351 | struct qstr name = { .name = "" }; |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 352 | struct path path; |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 353 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | int fd; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 355 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 356 | fd = get_unused_fd_flags(flags); |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 357 | if (unlikely(fd < 0)) |
| 358 | return fd; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 359 | |
Nick Piggin | 4b93688 | 2011-01-07 17:50:07 +1100 | [diff] [blame] | 360 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 361 | if (unlikely(!path.dentry)) { |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 362 | put_unused_fd(fd); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 363 | return -ENOMEM; |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 364 | } |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 365 | path.mnt = mntget(sock_mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 367 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 368 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
| 369 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 370 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 371 | &socket_file_ops); |
| 372 | if (unlikely(!file)) { |
| 373 | /* drop dentry, keep inode */ |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 374 | ihold(path.dentry->d_inode); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 375 | path_put(&path); |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 376 | put_unused_fd(fd); |
| 377 | return -ENFILE; |
| 378 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 379 | |
| 380 | sock->file = file; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 381 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 382 | file->f_pos = 0; |
| 383 | file->private_data = sock; |
| 384 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 385 | *f = file; |
| 386 | return fd; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 387 | } |
| 388 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 389 | int sock_map_fd(struct socket *sock, int flags) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 390 | { |
| 391 | struct file *newfile; |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 392 | int fd = sock_alloc_file(sock, &newfile, flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 393 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 394 | if (likely(fd >= 0)) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 395 | fd_install(fd, newfile); |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | return fd; |
| 398 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 399 | EXPORT_SYMBOL(sock_map_fd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 401 | static struct socket *sock_from_file(struct file *file, int *err) |
| 402 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 403 | if (file->f_op == &socket_file_ops) |
| 404 | return file->private_data; /* set in sock_map_fd */ |
| 405 | |
Eric Dumazet | 23bb80d | 2007-02-08 14:59:57 -0800 | [diff] [blame] | 406 | *err = -ENOTSOCK; |
| 407 | return NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 408 | } |
| 409 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | /** |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 411 | * sockfd_lookup - Go from a file number to its socket slot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | * @fd: file handle |
| 413 | * @err: pointer to an error code return |
| 414 | * |
| 415 | * The file handle passed in is locked and the socket it is bound |
| 416 | * too is returned. If an error occurs the err pointer is overwritten |
| 417 | * with a negative errno code and NULL is returned. The function checks |
| 418 | * for both invalid handles and passing a handle which is not a socket. |
| 419 | * |
| 420 | * On a success the socket object pointer is returned. |
| 421 | */ |
| 422 | |
| 423 | struct socket *sockfd_lookup(int fd, int *err) |
| 424 | { |
| 425 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | struct socket *sock; |
| 427 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 428 | file = fget(fd); |
| 429 | if (!file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | *err = -EBADF; |
| 431 | return NULL; |
| 432 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 433 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 434 | sock = sock_from_file(file, err); |
| 435 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | fput(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | return sock; |
| 438 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 439 | EXPORT_SYMBOL(sockfd_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 441 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
| 442 | { |
| 443 | struct file *file; |
| 444 | struct socket *sock; |
| 445 | |
Hua Zhong | 3672558 | 2006-04-19 15:25:02 -0700 | [diff] [blame] | 446 | *err = -EBADF; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 447 | file = fget_light(fd, fput_needed); |
| 448 | if (file) { |
| 449 | sock = sock_from_file(file, err); |
| 450 | if (sock) |
| 451 | return sock; |
| 452 | fput_light(file, *fput_needed); |
| 453 | } |
| 454 | return NULL; |
| 455 | } |
| 456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | /** |
| 458 | * sock_alloc - allocate a socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 459 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | * Allocate a new inode and socket object. The two are bound together |
| 461 | * and initialised. The socket is then returned. If we are out of inodes |
| 462 | * NULL is returned. |
| 463 | */ |
| 464 | |
| 465 | static struct socket *sock_alloc(void) |
| 466 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 467 | struct inode *inode; |
| 468 | struct socket *sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Eric Dumazet | a209dfc | 2011-07-26 11:36:34 +0200 | [diff] [blame] | 470 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | if (!inode) |
| 472 | return NULL; |
| 473 | |
| 474 | sock = SOCKET_I(inode); |
| 475 | |
Eric Dumazet | 29a020d | 2009-09-15 02:39:20 -0700 | [diff] [blame] | 476 | kmemcheck_annotate_bitfield(sock, type); |
Christoph Hellwig | 85fe402 | 2010-10-23 11:19:54 -0400 | [diff] [blame] | 477 | inode->i_ino = get_next_ino(); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 478 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
David Howells | 8192b0c | 2008-11-14 10:39:10 +1100 | [diff] [blame] | 479 | inode->i_uid = current_fsuid(); |
| 480 | inode->i_gid = current_fsgid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | |
Eric Dumazet | 4e69489 | 2009-04-04 16:41:09 -0700 | [diff] [blame] | 482 | percpu_add(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | return sock; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * In theory you can't get an open on this inode, but /proc provides |
| 488 | * a back door. Remember to keep it shut otherwise you'll let the |
| 489 | * creepy crawlies in. |
| 490 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
| 493 | { |
| 494 | return -ENXIO; |
| 495 | } |
| 496 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 497 | const struct file_operations bad_sock_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | .owner = THIS_MODULE, |
| 499 | .open = sock_no_open, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 500 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | }; |
| 502 | |
| 503 | /** |
| 504 | * sock_release - close a socket |
| 505 | * @sock: socket to close |
| 506 | * |
| 507 | * The socket is released from the protocol stack if it has a release |
| 508 | * callback, and the inode is then released if the socket is bound to |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 509 | * an inode not a file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | void sock_release(struct socket *sock) |
| 513 | { |
| 514 | if (sock->ops) { |
| 515 | struct module *owner = sock->ops->owner; |
| 516 | |
| 517 | sock->ops->release(sock); |
| 518 | sock->ops = NULL; |
| 519 | module_put(owner); |
| 520 | } |
| 521 | |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 522 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
| 524 | |
Eric Dumazet | 4e69489 | 2009-04-04 16:41:09 -0700 | [diff] [blame] | 525 | percpu_sub(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | if (!sock->file) { |
| 527 | iput(SOCK_INODE(sock)); |
| 528 | return; |
| 529 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 530 | sock->file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 532 | EXPORT_SYMBOL(sock_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 534 | int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 535 | { |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 536 | *tx_flags = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 537 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 538 | *tx_flags |= SKBTX_HW_TSTAMP; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 539 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 540 | *tx_flags |= SKBTX_SW_TSTAMP; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 541 | return 0; |
| 542 | } |
| 543 | EXPORT_SYMBOL(sock_tx_timestamp); |
| 544 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 545 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 546 | struct msghdr *msg, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | { |
| 548 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 550 | sock_update_classid(sock->sk); |
| 551 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | si->sock = sock; |
| 553 | si->scm = NULL; |
| 554 | si->msg = msg; |
| 555 | si->size = size; |
| 556 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | return sock->ops->sendmsg(iocb, sock, msg, size); |
| 558 | } |
| 559 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 560 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 561 | struct msghdr *msg, size_t size) |
| 562 | { |
| 563 | int err = security_socket_sendmsg(sock, msg, size); |
| 564 | |
| 565 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); |
| 566 | } |
| 567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
| 569 | { |
| 570 | struct kiocb iocb; |
| 571 | struct sock_iocb siocb; |
| 572 | int ret; |
| 573 | |
| 574 | init_sync_kiocb(&iocb, NULL); |
| 575 | iocb.private = &siocb; |
| 576 | ret = __sock_sendmsg(&iocb, sock, msg, size); |
| 577 | if (-EIOCBQUEUED == ret) |
| 578 | ret = wait_on_sync_kiocb(&iocb); |
| 579 | return ret; |
| 580 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 581 | EXPORT_SYMBOL(sock_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
Eric Dumazet | 894dc24 | 2011-07-26 02:39:41 +0000 | [diff] [blame] | 583 | static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 584 | { |
| 585 | struct kiocb iocb; |
| 586 | struct sock_iocb siocb; |
| 587 | int ret; |
| 588 | |
| 589 | init_sync_kiocb(&iocb, NULL); |
| 590 | iocb.private = &siocb; |
| 591 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); |
| 592 | if (-EIOCBQUEUED == ret) |
| 593 | ret = wait_on_sync_kiocb(&iocb); |
| 594 | return ret; |
| 595 | } |
| 596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 598 | struct kvec *vec, size_t num, size_t size) |
| 599 | { |
| 600 | mm_segment_t oldfs = get_fs(); |
| 601 | int result; |
| 602 | |
| 603 | set_fs(KERNEL_DS); |
| 604 | /* |
| 605 | * the following is safe, since for compiler definitions of kvec and |
| 606 | * iovec are identical, yielding the same in-core layout and alignment |
| 607 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 608 | msg->msg_iov = (struct iovec *)vec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | msg->msg_iovlen = num; |
| 610 | result = sock_sendmsg(sock, msg, size); |
| 611 | set_fs(oldfs); |
| 612 | return result; |
| 613 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 614 | EXPORT_SYMBOL(kernel_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 616 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
| 617 | { |
| 618 | if (kt.tv64) { |
| 619 | *ts = ktime_to_timespec(kt); |
| 620 | return 1; |
| 621 | } else { |
| 622 | return 0; |
| 623 | } |
| 624 | } |
| 625 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 626 | /* |
| 627 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 628 | */ |
| 629 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 630 | struct sk_buff *skb) |
| 631 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 632 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
| 633 | struct timespec ts[3]; |
| 634 | int empty = 1; |
| 635 | struct skb_shared_hwtstamps *shhwtstamps = |
| 636 | skb_hwtstamps(skb); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 637 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 638 | /* Race occurred between timestamp enabling and packet |
| 639 | receiving. Fill in the current time for now. */ |
| 640 | if (need_software_tstamp && skb->tstamp.tv64 == 0) |
| 641 | __net_timestamp(skb); |
| 642 | |
| 643 | if (need_software_tstamp) { |
| 644 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
| 645 | struct timeval tv; |
| 646 | skb_get_timestamp(skb, &tv); |
| 647 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, |
| 648 | sizeof(tv), &tv); |
| 649 | } else { |
Hagen Paul Pfeifer | 842509b | 2010-04-06 05:39:52 +0000 | [diff] [blame] | 650 | skb_get_timestampns(skb, &ts[0]); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 651 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
Hagen Paul Pfeifer | 842509b | 2010-04-06 05:39:52 +0000 | [diff] [blame] | 652 | sizeof(ts[0]), &ts[0]); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 653 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 654 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 655 | |
| 656 | |
| 657 | memset(ts, 0, sizeof(ts)); |
| 658 | if (skb->tstamp.tv64 && |
| 659 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { |
| 660 | skb_get_timestampns(skb, ts + 0); |
| 661 | empty = 0; |
| 662 | } |
| 663 | if (shhwtstamps) { |
| 664 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && |
| 665 | ktime2ts(shhwtstamps->syststamp, ts + 1)) |
| 666 | empty = 0; |
| 667 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && |
| 668 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) |
| 669 | empty = 0; |
| 670 | } |
| 671 | if (!empty) |
| 672 | put_cmsg(msg, SOL_SOCKET, |
| 673 | SCM_TIMESTAMPING, sizeof(ts), &ts); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 674 | } |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 675 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 676 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 677 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
| 678 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 679 | { |
| 680 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) |
| 681 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
| 682 | sizeof(__u32), &skb->dropcount); |
| 683 | } |
| 684 | |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 685 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 686 | struct sk_buff *skb) |
| 687 | { |
| 688 | sock_recv_timestamp(msg, sk, skb); |
| 689 | sock_recv_drops(msg, sk, skb); |
| 690 | } |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 691 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 692 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 693 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 694 | struct msghdr *msg, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
| 697 | |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 698 | sock_update_classid(sock->sk); |
| 699 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | si->sock = sock; |
| 701 | si->scm = NULL; |
| 702 | si->msg = msg; |
| 703 | si->size = size; |
| 704 | si->flags = flags; |
| 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
| 707 | } |
| 708 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 709 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 710 | struct msghdr *msg, size_t size, int flags) |
| 711 | { |
| 712 | int err = security_socket_recvmsg(sock, msg, size, flags); |
| 713 | |
| 714 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); |
| 715 | } |
| 716 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 717 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | size_t size, int flags) |
| 719 | { |
| 720 | struct kiocb iocb; |
| 721 | struct sock_iocb siocb; |
| 722 | int ret; |
| 723 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 724 | init_sync_kiocb(&iocb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | iocb.private = &siocb; |
| 726 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); |
| 727 | if (-EIOCBQUEUED == ret) |
| 728 | ret = wait_on_sync_kiocb(&iocb); |
| 729 | return ret; |
| 730 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 731 | EXPORT_SYMBOL(sock_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 733 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
| 734 | size_t size, int flags) |
| 735 | { |
| 736 | struct kiocb iocb; |
| 737 | struct sock_iocb siocb; |
| 738 | int ret; |
| 739 | |
| 740 | init_sync_kiocb(&iocb, NULL); |
| 741 | iocb.private = &siocb; |
| 742 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); |
| 743 | if (-EIOCBQUEUED == ret) |
| 744 | ret = wait_on_sync_kiocb(&iocb); |
| 745 | return ret; |
| 746 | } |
| 747 | |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 748 | /** |
| 749 | * kernel_recvmsg - Receive a message from a socket (kernel space) |
| 750 | * @sock: The socket to receive the message from |
| 751 | * @msg: Received message |
| 752 | * @vec: Input s/g array for message data |
| 753 | * @num: Size of input s/g array |
| 754 | * @size: Number of bytes to read |
| 755 | * @flags: Message flags (MSG_DONTWAIT, etc...) |
| 756 | * |
| 757 | * On return the msg structure contains the scatter/gather array passed in the |
| 758 | * vec argument. The array is modified so that it consists of the unfilled |
| 759 | * portion of the original array. |
| 760 | * |
| 761 | * The returned value is the total number of bytes received, or an error. |
| 762 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 763 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 764 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | { |
| 766 | mm_segment_t oldfs = get_fs(); |
| 767 | int result; |
| 768 | |
| 769 | set_fs(KERNEL_DS); |
| 770 | /* |
| 771 | * the following is safe, since for compiler definitions of kvec and |
| 772 | * iovec are identical, yielding the same in-core layout and alignment |
| 773 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 774 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | result = sock_recvmsg(sock, msg, size, flags); |
| 776 | set_fs(oldfs); |
| 777 | return result; |
| 778 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 779 | EXPORT_SYMBOL(kernel_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
| 781 | static void sock_aio_dtor(struct kiocb *iocb) |
| 782 | { |
| 783 | kfree(iocb->private); |
| 784 | } |
| 785 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 786 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 787 | int offset, size_t size, loff_t *ppos, int more) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | { |
| 789 | struct socket *sock; |
| 790 | int flags; |
| 791 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 792 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | |
| 794 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; |
| 795 | if (more) |
| 796 | flags |= MSG_MORE; |
| 797 | |
Linus Torvalds | e694958 | 2009-08-13 08:28:36 -0700 | [diff] [blame] | 798 | return kernel_sendpage(sock, page, offset, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | } |
| 800 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 801 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 802 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 803 | unsigned int flags) |
| 804 | { |
| 805 | struct socket *sock = file->private_data; |
| 806 | |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 807 | if (unlikely(!sock->ops->splice_read)) |
| 808 | return -EINVAL; |
| 809 | |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 810 | sock_update_classid(sock->sk); |
| 811 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 812 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
| 813 | } |
| 814 | |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 815 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 816 | struct sock_iocb *siocb) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 817 | { |
| 818 | if (!is_sync_kiocb(iocb)) { |
| 819 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); |
| 820 | if (!siocb) |
| 821 | return NULL; |
| 822 | iocb->ki_dtor = sock_aio_dtor; |
| 823 | } |
| 824 | |
| 825 | siocb->kiocb = iocb; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 826 | iocb->private = siocb; |
| 827 | return siocb; |
| 828 | } |
| 829 | |
| 830 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 831 | struct file *file, const struct iovec *iov, |
| 832 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 833 | { |
| 834 | struct socket *sock = file->private_data; |
| 835 | size_t size = 0; |
| 836 | int i; |
| 837 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 838 | for (i = 0; i < nr_segs; i++) |
| 839 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 840 | |
| 841 | msg->msg_name = NULL; |
| 842 | msg->msg_namelen = 0; |
| 843 | msg->msg_control = NULL; |
| 844 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 845 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 846 | msg->msg_iovlen = nr_segs; |
| 847 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 848 | |
| 849 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); |
| 850 | } |
| 851 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 852 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 853 | unsigned long nr_segs, loff_t pos) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 854 | { |
| 855 | struct sock_iocb siocb, *x; |
| 856 | |
| 857 | if (pos != 0) |
| 858 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 859 | |
| 860 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 861 | return 0; |
| 862 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 863 | |
| 864 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 865 | if (!x) |
| 866 | return -ENOMEM; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 867 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 868 | } |
| 869 | |
| 870 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 871 | struct file *file, const struct iovec *iov, |
| 872 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 873 | { |
| 874 | struct socket *sock = file->private_data; |
| 875 | size_t size = 0; |
| 876 | int i; |
| 877 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 878 | for (i = 0; i < nr_segs; i++) |
| 879 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 880 | |
| 881 | msg->msg_name = NULL; |
| 882 | msg->msg_namelen = 0; |
| 883 | msg->msg_control = NULL; |
| 884 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 885 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 886 | msg->msg_iovlen = nr_segs; |
| 887 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 888 | if (sock->type == SOCK_SEQPACKET) |
| 889 | msg->msg_flags |= MSG_EOR; |
| 890 | |
| 891 | return __sock_sendmsg(iocb, sock, msg, size); |
| 892 | } |
| 893 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 894 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 895 | unsigned long nr_segs, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | { |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 897 | struct sock_iocb siocb, *x; |
| 898 | |
| 899 | if (pos != 0) |
| 900 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 901 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 902 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 903 | if (!x) |
| 904 | return -ENOMEM; |
| 905 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 906 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | } |
| 908 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | /* |
| 910 | * Atomic setting of ioctl hooks to avoid race |
| 911 | * with module unload. |
| 912 | */ |
| 913 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 914 | static DEFINE_MUTEX(br_ioctl_mutex); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 915 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 917 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 919 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 921 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | } |
| 923 | EXPORT_SYMBOL(brioctl_set); |
| 924 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 925 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 926 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 928 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 930 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 932 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | } |
| 934 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 935 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 936 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 937 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 939 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 941 | mutex_lock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | dlci_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 943 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 944 | } |
| 945 | EXPORT_SYMBOL(dlci_ioctl_set); |
| 946 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 947 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
| 948 | unsigned int cmd, unsigned long arg) |
| 949 | { |
| 950 | int err; |
| 951 | void __user *argp = (void __user *)arg; |
| 952 | |
| 953 | err = sock->ops->ioctl(sock, cmd, arg); |
| 954 | |
| 955 | /* |
| 956 | * If this ioctl is unknown try to hand it down |
| 957 | * to the NIC driver. |
| 958 | */ |
| 959 | if (err == -ENOIOCTLCMD) |
| 960 | err = dev_ioctl(net, cmd, argp); |
| 961 | |
| 962 | return err; |
| 963 | } |
| 964 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | /* |
| 966 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 967 | * what to do with it - that's up to the protocol still. |
| 968 | */ |
| 969 | |
| 970 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 971 | { |
| 972 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 973 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | void __user *argp = (void __user *)arg; |
| 975 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 976 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 978 | sock = file->private_data; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 979 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 980 | net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 982 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 984 | #ifdef CONFIG_WEXT_CORE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 986 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 988 | #endif |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 989 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | case FIOSETOWN: |
| 991 | case SIOCSPGRP: |
| 992 | err = -EFAULT; |
| 993 | if (get_user(pid, (int __user *)argp)) |
| 994 | break; |
| 995 | err = f_setown(sock->file, pid, 1); |
| 996 | break; |
| 997 | case FIOGETOWN: |
| 998 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 999 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1000 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | break; |
| 1002 | case SIOCGIFBR: |
| 1003 | case SIOCSIFBR: |
| 1004 | case SIOCBRADDBR: |
| 1005 | case SIOCBRDELBR: |
| 1006 | err = -ENOPKG; |
| 1007 | if (!br_ioctl_hook) |
| 1008 | request_module("bridge"); |
| 1009 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1010 | mutex_lock(&br_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1011 | if (br_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1012 | err = br_ioctl_hook(net, cmd, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1013 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | break; |
| 1015 | case SIOCGIFVLAN: |
| 1016 | case SIOCSIFVLAN: |
| 1017 | err = -ENOPKG; |
| 1018 | if (!vlan_ioctl_hook) |
| 1019 | request_module("8021q"); |
| 1020 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1021 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1023 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1024 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | case SIOCADDDLCI: |
| 1027 | case SIOCDELDLCI: |
| 1028 | err = -ENOPKG; |
| 1029 | if (!dlci_ioctl_hook) |
| 1030 | request_module("dlci"); |
| 1031 | |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1032 | mutex_lock(&dlci_ioctl_mutex); |
| 1033 | if (dlci_ioctl_hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | err = dlci_ioctl_hook(cmd, argp); |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1035 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | break; |
| 1037 | default: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1038 | err = sock_do_ioctl(net, sock, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1040 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | return err; |
| 1042 | } |
| 1043 | |
| 1044 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 1045 | { |
| 1046 | int err; |
| 1047 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1048 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | err = security_socket_create(family, type, protocol, 1); |
| 1050 | if (err) |
| 1051 | goto out; |
| 1052 | |
| 1053 | sock = sock_alloc(); |
| 1054 | if (!sock) { |
| 1055 | err = -ENOMEM; |
| 1056 | goto out; |
| 1057 | } |
| 1058 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1060 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 1061 | if (err) |
| 1062 | goto out_release; |
| 1063 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | out: |
| 1065 | *res = sock; |
| 1066 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1067 | out_release: |
| 1068 | sock_release(sock); |
| 1069 | sock = NULL; |
| 1070 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1072 | EXPORT_SYMBOL(sock_create_lite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | |
| 1074 | /* No kernel lock held - perfect */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1075 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | { |
| 1077 | struct socket *sock; |
| 1078 | |
| 1079 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1080 | * We can't return errors to poll, so it's either yes or no. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | */ |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1082 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | return sock->ops->poll(file, sock, wait); |
| 1084 | } |
| 1085 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1086 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1088 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | |
| 1090 | return sock->ops->mmap(file, sock, vma); |
| 1091 | } |
| 1092 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1093 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | { |
| 1095 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1096 | * It was possible the inode is NULL we were |
| 1097 | * closing an unfinished socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | */ |
| 1099 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1100 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
| 1102 | return 0; |
| 1103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | sock_release(SOCKET_I(inode)); |
| 1105 | return 0; |
| 1106 | } |
| 1107 | |
| 1108 | /* |
| 1109 | * Update the socket async list |
| 1110 | * |
| 1111 | * Fasync_list locking strategy. |
| 1112 | * |
| 1113 | * 1. fasync_list is modified only under process context socket lock |
| 1114 | * i.e. under semaphore. |
| 1115 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1116 | * or under socket lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | */ |
| 1118 | |
| 1119 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1120 | { |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1121 | struct socket *sock = filp->private_data; |
| 1122 | struct sock *sk = sock->sk; |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1123 | struct socket_wq *wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1125 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | |
| 1128 | lock_sock(sk); |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1129 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
| 1130 | fasync_helper(fd, filp, on, &wq->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1132 | if (!wq->fasync_list) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1133 | sock_reset_flag(sk, SOCK_FASYNC); |
Jonathan Corbet | 7639842 | 2009-02-01 14:26:59 -0700 | [diff] [blame] | 1134 | else |
Eric Dumazet | bcdce71 | 2009-10-06 17:28:29 -0700 | [diff] [blame] | 1135 | sock_set_flag(sk, SOCK_FASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1137 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | return 0; |
| 1139 | } |
| 1140 | |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1141 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
| 1143 | int sock_wake_async(struct socket *sock, int how, int band) |
| 1144 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1145 | struct socket_wq *wq; |
| 1146 | |
| 1147 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | return -1; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1149 | rcu_read_lock(); |
| 1150 | wq = rcu_dereference(sock->wq); |
| 1151 | if (!wq || !wq->fasync_list) { |
| 1152 | rcu_read_unlock(); |
| 1153 | return -1; |
| 1154 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1155 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1156 | case SOCK_WAKE_WAITD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
| 1158 | break; |
| 1159 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1160 | case SOCK_WAKE_SPACE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
| 1162 | break; |
| 1163 | /* fall through */ |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1164 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1165 | call_kill: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1166 | kill_fasync(&wq->fasync_list, SIGIO, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1168 | case SOCK_WAKE_URG: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1169 | kill_fasync(&wq->fasync_list, SIGURG, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | } |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1171 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | return 0; |
| 1173 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1174 | EXPORT_SYMBOL(sock_wake_async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1176 | int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1177 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | { |
| 1179 | int err; |
| 1180 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1181 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | |
| 1183 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1184 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | */ |
| 1186 | if (family < 0 || family >= NPROTO) |
| 1187 | return -EAFNOSUPPORT; |
| 1188 | if (type < 0 || type >= SOCK_MAX) |
| 1189 | return -EINVAL; |
| 1190 | |
| 1191 | /* Compatibility. |
| 1192 | |
| 1193 | This uglymoron is moved from INET layer to here to avoid |
| 1194 | deadlock in module load. |
| 1195 | */ |
| 1196 | if (family == PF_INET && type == SOCK_PACKET) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1197 | static int warned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | if (!warned) { |
| 1199 | warned = 1; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1200 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1201 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | } |
| 1203 | family = PF_PACKET; |
| 1204 | } |
| 1205 | |
| 1206 | err = security_socket_create(family, type, protocol, kern); |
| 1207 | if (err) |
| 1208 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1209 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1210 | /* |
| 1211 | * Allocate the socket and allow the family to set things up. if |
| 1212 | * the protocol is 0, the family is instructed to select an appropriate |
| 1213 | * default. |
| 1214 | */ |
| 1215 | sock = sock_alloc(); |
| 1216 | if (!sock) { |
| 1217 | if (net_ratelimit()) |
| 1218 | printk(KERN_WARNING "socket: no more sockets\n"); |
| 1219 | return -ENFILE; /* Not exactly a match, but its the |
| 1220 | closest posix thing */ |
| 1221 | } |
| 1222 | |
| 1223 | sock->type = type; |
| 1224 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1225 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1226 | /* Attempt to load a protocol module if the find failed. |
| 1227 | * |
| 1228 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | * requested real, full-featured networking support upon configuration. |
| 1230 | * Otherwise module support will break! |
| 1231 | */ |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 1232 | if (rcu_access_pointer(net_families[family]) == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1233 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | #endif |
| 1235 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1236 | rcu_read_lock(); |
| 1237 | pf = rcu_dereference(net_families[family]); |
| 1238 | err = -EAFNOSUPPORT; |
| 1239 | if (!pf) |
| 1240 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1241 | |
| 1242 | /* |
| 1243 | * We will call the ->create function, that possibly is in a loadable |
| 1244 | * module, so we have to bump that loadable module refcnt first. |
| 1245 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1246 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | goto out_release; |
| 1248 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1249 | /* Now protected by module ref count */ |
| 1250 | rcu_read_unlock(); |
| 1251 | |
Eric Paris | 3f378b68 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 1252 | err = pf->create(net, sock, protocol, kern); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1253 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | /* |
| 1257 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1258 | * socket at sock_release time we decrement its refcnt. |
| 1259 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1260 | if (!try_module_get(sock->ops->owner)) |
| 1261 | goto out_module_busy; |
| 1262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | /* |
| 1264 | * Now that we're done with the ->create function, the [loadable] |
| 1265 | * module can have its refcnt decremented |
| 1266 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1267 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1268 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1269 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1270 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1271 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1273 | return 0; |
| 1274 | |
| 1275 | out_module_busy: |
| 1276 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1278 | sock->ops = NULL; |
| 1279 | module_put(pf->owner); |
| 1280 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1282 | return err; |
| 1283 | |
| 1284 | out_release: |
| 1285 | rcu_read_unlock(); |
| 1286 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | } |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1288 | EXPORT_SYMBOL(__sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | |
| 1290 | int sock_create(int family, int type, int protocol, struct socket **res) |
| 1291 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1292 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1294 | EXPORT_SYMBOL(sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | |
| 1296 | int sock_create_kern(int family, int type, int protocol, struct socket **res) |
| 1297 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1298 | return __sock_create(&init_net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1300 | EXPORT_SYMBOL(sock_create_kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1302 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | { |
| 1304 | int retval; |
| 1305 | struct socket *sock; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1306 | int flags; |
| 1307 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1308 | /* Check the SOCK_* constants for consistency. */ |
| 1309 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1310 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1311 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1312 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1313 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1314 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1315 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1316 | return -EINVAL; |
| 1317 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1319 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1320 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | retval = sock_create(family, type, protocol, &sock); |
| 1323 | if (retval < 0) |
| 1324 | goto out; |
| 1325 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1326 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1327 | if (retval < 0) |
| 1328 | goto out_release; |
| 1329 | |
| 1330 | out: |
| 1331 | /* It may be already another descriptor 8) Not kernel problem. */ |
| 1332 | return retval; |
| 1333 | |
| 1334 | out_release: |
| 1335 | sock_release(sock); |
| 1336 | return retval; |
| 1337 | } |
| 1338 | |
| 1339 | /* |
| 1340 | * Create a pair of connected sockets. |
| 1341 | */ |
| 1342 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1343 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
| 1344 | int __user *, usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | { |
| 1346 | struct socket *sock1, *sock2; |
| 1347 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1348 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1349 | int flags; |
| 1350 | |
| 1351 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1352 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1353 | return -EINVAL; |
| 1354 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1356 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1357 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | /* |
| 1360 | * Obtain the first socket and check if the underlying protocol |
| 1361 | * supports the socketpair call. |
| 1362 | */ |
| 1363 | |
| 1364 | err = sock_create(family, type, protocol, &sock1); |
| 1365 | if (err < 0) |
| 1366 | goto out; |
| 1367 | |
| 1368 | err = sock_create(family, type, protocol, &sock2); |
| 1369 | if (err < 0) |
| 1370 | goto out_release_1; |
| 1371 | |
| 1372 | err = sock1->ops->socketpair(sock1, sock2); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1373 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | goto out_release_both; |
| 1375 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 1376 | fd1 = sock_alloc_file(sock1, &newfile1, flags); |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1377 | if (unlikely(fd1 < 0)) { |
| 1378 | err = fd1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | goto out_release_both; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1380 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 1382 | fd2 = sock_alloc_file(sock2, &newfile2, flags); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1383 | if (unlikely(fd2 < 0)) { |
| 1384 | err = fd2; |
| 1385 | fput(newfile1); |
| 1386 | put_unused_fd(fd1); |
| 1387 | sock_release(sock2); |
| 1388 | goto out; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1389 | } |
| 1390 | |
Al Viro | 157cf64 | 2008-12-14 04:57:47 -0500 | [diff] [blame] | 1391 | audit_fd_pair(fd1, fd2); |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1392 | fd_install(fd1, newfile1); |
| 1393 | fd_install(fd2, newfile2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | /* fd1 and fd2 may be already another descriptors. |
| 1395 | * Not kernel problem. |
| 1396 | */ |
| 1397 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1398 | err = put_user(fd1, &usockvec[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | if (!err) |
| 1400 | err = put_user(fd2, &usockvec[1]); |
| 1401 | if (!err) |
| 1402 | return 0; |
| 1403 | |
| 1404 | sys_close(fd2); |
| 1405 | sys_close(fd1); |
| 1406 | return err; |
| 1407 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | out_release_both: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1409 | sock_release(sock2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | out_release_1: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1411 | sock_release(sock1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | out: |
| 1413 | return err; |
| 1414 | } |
| 1415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | /* |
| 1417 | * Bind a name to a socket. Nothing much to do here since it's |
| 1418 | * the protocol's responsibility to handle the local address. |
| 1419 | * |
| 1420 | * We move the socket address to kernel space before we call |
| 1421 | * the protocol layer (having also checked the address is ok). |
| 1422 | */ |
| 1423 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1424 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | { |
| 1426 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1427 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1428 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1430 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1431 | if (sock) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1432 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1433 | if (err >= 0) { |
| 1434 | err = security_socket_bind(sock, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1435 | (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1436 | addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1437 | if (!err) |
| 1438 | err = sock->ops->bind(sock, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1439 | (struct sockaddr *) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1440 | &address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | } |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1442 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1443 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | return err; |
| 1445 | } |
| 1446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | /* |
| 1448 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1449 | * necessary for a listen, and if that works, we mark the socket as |
| 1450 | * ready for listening. |
| 1451 | */ |
| 1452 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1453 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | { |
| 1455 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1456 | int err, fput_needed; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1457 | int somaxconn; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1458 | |
| 1459 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1460 | if (sock) { |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 1461 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1462 | if ((unsigned)backlog > somaxconn) |
| 1463 | backlog = somaxconn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | |
| 1465 | err = security_socket_listen(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1466 | if (!err) |
| 1467 | err = sock->ops->listen(sock, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1469 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | } |
| 1471 | return err; |
| 1472 | } |
| 1473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | /* |
| 1475 | * For accept, we attempt to create a new socket, set up the link |
| 1476 | * with the client, wake up the client, then return the new |
| 1477 | * connected fd. We collect the address of the connector in kernel |
| 1478 | * space and move it to user at the very end. This is unclean because |
| 1479 | * we open the socket then return an error. |
| 1480 | * |
| 1481 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 1482 | * status to recvmsg. We need to add that support in a way thats |
| 1483 | * clean when we restucture accept also. |
| 1484 | */ |
| 1485 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1486 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1487 | int __user *, upeer_addrlen, int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | { |
| 1489 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1490 | struct file *newfile; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1491 | int err, len, newfd, fput_needed; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1492 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1494 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1495 | return -EINVAL; |
| 1496 | |
| 1497 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1498 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1499 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1500 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | if (!sock) |
| 1502 | goto out; |
| 1503 | |
| 1504 | err = -ENFILE; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1505 | newsock = sock_alloc(); |
| 1506 | if (!newsock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | goto out_put; |
| 1508 | |
| 1509 | newsock->type = sock->type; |
| 1510 | newsock->ops = sock->ops; |
| 1511 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | /* |
| 1513 | * We don't need try_module_get here, as the listening socket (sock) |
| 1514 | * has the protocol module (sock->ops->owner) held. |
| 1515 | */ |
| 1516 | __module_get(newsock->ops->owner); |
| 1517 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 1518 | newfd = sock_alloc_file(newsock, &newfile, flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1519 | if (unlikely(newfd < 0)) { |
| 1520 | err = newfd; |
David S. Miller | 9a1875e | 2006-04-01 12:48:36 -0800 | [diff] [blame] | 1521 | sock_release(newsock); |
| 1522 | goto out_put; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1523 | } |
| 1524 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1525 | err = security_socket_accept(sock, newsock); |
| 1526 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1527 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
| 1530 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1531 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | |
| 1533 | if (upeer_sockaddr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1534 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1535 | &len, 2) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1537 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | } |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1539 | err = move_addr_to_user((struct sockaddr *)&address, |
| 1540 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1542 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | } |
| 1544 | |
| 1545 | /* File flags are not inherited via accept() unlike another OSes. */ |
| 1546 | |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1547 | fd_install(newfd, newfile); |
| 1548 | err = newfd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1551 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | out: |
| 1553 | return err; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1554 | out_fd: |
David S. Miller | 9606a21 | 2006-04-01 01:00:14 -0800 | [diff] [blame] | 1555 | fput(newfile); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1556 | put_unused_fd(newfd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | goto out_put; |
| 1558 | } |
| 1559 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1560 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1561 | int __user *, upeer_addrlen) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1562 | { |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 1563 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1564 | } |
| 1565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1566 | /* |
| 1567 | * Attempt to connect to a socket with the server address. The address |
| 1568 | * is in user space so we verify it is OK and move it to kernel space. |
| 1569 | * |
| 1570 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 1571 | * break bindings |
| 1572 | * |
| 1573 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 1574 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 1575 | * include the -EINPROGRESS status for such sockets. |
| 1576 | */ |
| 1577 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1578 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
| 1579 | int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | { |
| 1581 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1582 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1583 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1585 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | if (!sock) |
| 1587 | goto out; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1588 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | if (err < 0) |
| 1590 | goto out_put; |
| 1591 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1592 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1593 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | if (err) |
| 1595 | goto out_put; |
| 1596 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1597 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | sock->file->f_flags); |
| 1599 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1600 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1601 | out: |
| 1602 | return err; |
| 1603 | } |
| 1604 | |
| 1605 | /* |
| 1606 | * Get the local address ('name') of a socket object. Move the obtained |
| 1607 | * name to user space. |
| 1608 | */ |
| 1609 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1610 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
| 1611 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | { |
| 1613 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1614 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1615 | int len, err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1616 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1617 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | if (!sock) |
| 1619 | goto out; |
| 1620 | |
| 1621 | err = security_socket_getsockname(sock); |
| 1622 | if (err) |
| 1623 | goto out_put; |
| 1624 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1625 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | if (err) |
| 1627 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1628 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | |
| 1630 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1631 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | out: |
| 1633 | return err; |
| 1634 | } |
| 1635 | |
| 1636 | /* |
| 1637 | * Get the remote address ('name') of a socket object. Move the obtained |
| 1638 | * name to user space. |
| 1639 | */ |
| 1640 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1641 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
| 1642 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | { |
| 1644 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1645 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1646 | int len, err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1648 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1649 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | err = security_socket_getpeername(sock); |
| 1651 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1652 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | return err; |
| 1654 | } |
| 1655 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1656 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1657 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1658 | 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | if (!err) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1660 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1661 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1662 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | } |
| 1664 | return err; |
| 1665 | } |
| 1666 | |
| 1667 | /* |
| 1668 | * Send a datagram to a given address. We move the address into kernel |
| 1669 | * space and check the user space data area is readable before invoking |
| 1670 | * the protocol. |
| 1671 | */ |
| 1672 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1673 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
| 1674 | unsigned, flags, struct sockaddr __user *, addr, |
| 1675 | int, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | { |
| 1677 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1678 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | int err; |
| 1680 | struct msghdr msg; |
| 1681 | struct iovec iov; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1682 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1683 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1684 | if (len > INT_MAX) |
| 1685 | len = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1686 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1687 | if (!sock) |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1688 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1689 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1690 | iov.iov_base = buff; |
| 1691 | iov.iov_len = len; |
| 1692 | msg.msg_name = NULL; |
| 1693 | msg.msg_iov = &iov; |
| 1694 | msg.msg_iovlen = 1; |
| 1695 | msg.msg_control = NULL; |
| 1696 | msg.msg_controllen = 0; |
| 1697 | msg.msg_namelen = 0; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1698 | if (addr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1699 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | if (err < 0) |
| 1701 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1702 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1703 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | } |
| 1705 | if (sock->file->f_flags & O_NONBLOCK) |
| 1706 | flags |= MSG_DONTWAIT; |
| 1707 | msg.msg_flags = flags; |
| 1708 | err = sock_sendmsg(sock, &msg, len); |
| 1709 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1710 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1711 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1712 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | return err; |
| 1714 | } |
| 1715 | |
| 1716 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1717 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | */ |
| 1719 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1720 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
| 1721 | unsigned, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | { |
| 1723 | return sys_sendto(fd, buff, len, flags, NULL, 0); |
| 1724 | } |
| 1725 | |
| 1726 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1727 | * Receive a frame from the socket and optionally record the address of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | * sender. We verify the buffers are writable and if needed move the |
| 1729 | * sender address from kernel to user space. |
| 1730 | */ |
| 1731 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1732 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
| 1733 | unsigned, flags, struct sockaddr __user *, addr, |
| 1734 | int __user *, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | { |
| 1736 | struct socket *sock; |
| 1737 | struct iovec iov; |
| 1738 | struct msghdr msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1739 | struct sockaddr_storage address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1740 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1741 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1743 | if (size > INT_MAX) |
| 1744 | size = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1745 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | if (!sock) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1747 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1749 | msg.msg_control = NULL; |
| 1750 | msg.msg_controllen = 0; |
| 1751 | msg.msg_iovlen = 1; |
| 1752 | msg.msg_iov = &iov; |
| 1753 | iov.iov_len = size; |
| 1754 | iov.iov_base = ubuf; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1755 | msg.msg_name = (struct sockaddr *)&address; |
| 1756 | msg.msg_namelen = sizeof(address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | if (sock->file->f_flags & O_NONBLOCK) |
| 1758 | flags |= MSG_DONTWAIT; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1759 | err = sock_recvmsg(sock, &msg, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1761 | if (err >= 0 && addr != NULL) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1762 | err2 = move_addr_to_user((struct sockaddr *)&address, |
| 1763 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1764 | if (err2 < 0) |
| 1765 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1767 | |
| 1768 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff75 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1769 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1770 | return err; |
| 1771 | } |
| 1772 | |
| 1773 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1774 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | */ |
| 1776 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1777 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
| 1778 | unsigned flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | { |
| 1780 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
| 1781 | } |
| 1782 | |
| 1783 | /* |
| 1784 | * Set a socket option. Because we don't know the option lengths we have |
| 1785 | * to pass the user mode parameter for the protocols to sort out. |
| 1786 | */ |
| 1787 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1788 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| 1789 | char __user *, optval, int, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1791 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1792 | struct socket *sock; |
| 1793 | |
| 1794 | if (optlen < 0) |
| 1795 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1796 | |
| 1797 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1798 | if (sock != NULL) { |
| 1799 | err = security_socket_setsockopt(sock, level, optname); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1800 | if (err) |
| 1801 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | |
| 1803 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1804 | err = |
| 1805 | sock_setsockopt(sock, level, optname, optval, |
| 1806 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1808 | err = |
| 1809 | sock->ops->setsockopt(sock, level, optname, optval, |
| 1810 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1811 | out_put: |
| 1812 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | } |
| 1814 | return err; |
| 1815 | } |
| 1816 | |
| 1817 | /* |
| 1818 | * Get a socket option. Because we don't know the option lengths we have |
| 1819 | * to pass a user mode parameter for the protocols to sort out. |
| 1820 | */ |
| 1821 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1822 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| 1823 | char __user *, optval, int __user *, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1825 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | struct socket *sock; |
| 1827 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1828 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1829 | if (sock != NULL) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1830 | err = security_socket_getsockopt(sock, level, optname); |
| 1831 | if (err) |
| 1832 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | |
| 1834 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1835 | err = |
| 1836 | sock_getsockopt(sock, level, optname, optval, |
| 1837 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1839 | err = |
| 1840 | sock->ops->getsockopt(sock, level, optname, optval, |
| 1841 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1842 | out_put: |
| 1843 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | } |
| 1845 | return err; |
| 1846 | } |
| 1847 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | /* |
| 1849 | * Shutdown a socket. |
| 1850 | */ |
| 1851 | |
Heiko Carstens | 754fe8d | 2009-01-14 14:14:09 +0100 | [diff] [blame] | 1852 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1853 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1854 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1855 | struct socket *sock; |
| 1856 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1857 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1858 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | err = security_socket_shutdown(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1860 | if (!err) |
| 1861 | err = sock->ops->shutdown(sock, how); |
| 1862 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | } |
| 1864 | return err; |
| 1865 | } |
| 1866 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1867 | /* A couple of helpful macros for getting the address of the 32/64 bit |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1868 | * fields which are the same type (int / unsigned) on our platforms. |
| 1869 | */ |
| 1870 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 1871 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 1872 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 1873 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame^] | 1874 | struct used_address { |
| 1875 | struct sockaddr_storage name; |
| 1876 | unsigned int name_len; |
| 1877 | }; |
| 1878 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1879 | static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame^] | 1880 | struct msghdr *msg_sys, unsigned flags, |
| 1881 | struct used_address *used_address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1883 | struct compat_msghdr __user *msg_compat = |
| 1884 | (struct compat_msghdr __user *)msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1885 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 1887 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1888 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
| 1889 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | unsigned char *ctl_buf = ctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | int err, ctl_len, iov_size, total_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | err = -EFAULT; |
| 1894 | if (MSG_CMSG_COMPAT & flags) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1895 | if (get_compat_msghdr(msg_sys, msg_compat)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | return -EFAULT; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1897 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | return -EFAULT; |
| 1899 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | /* do not move before msg_sys is valid */ |
| 1901 | err = -EMSGSIZE; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1902 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
| 1903 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1905 | /* Check whether to allocate the iovec area */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | err = -ENOMEM; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1907 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
| 1908 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
| 1910 | if (!iov) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1911 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | } |
| 1913 | |
| 1914 | /* This will also move the address data into kernel space */ |
| 1915 | if (MSG_CMSG_COMPAT & flags) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1916 | err = verify_compat_iovec(msg_sys, iov, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1917 | (struct sockaddr *)&address, |
| 1918 | VERIFY_READ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | } else |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1920 | err = verify_iovec(msg_sys, iov, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1921 | (struct sockaddr *)&address, |
| 1922 | VERIFY_READ); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1923 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | goto out_freeiov; |
| 1925 | total_len = err; |
| 1926 | |
| 1927 | err = -ENOBUFS; |
| 1928 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1929 | if (msg_sys->msg_controllen > INT_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1931 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1933 | err = |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1934 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1935 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | if (err) |
| 1937 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1938 | ctl_buf = msg_sys->msg_control; |
| 1939 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | } else if (ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1941 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1943 | if (ctl_buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | goto out_freeiov; |
| 1945 | } |
| 1946 | err = -EFAULT; |
| 1947 | /* |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1948 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
| 1950 | * checking falls down on this. |
| 1951 | */ |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 1952 | if (copy_from_user(ctl_buf, |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1953 | (void __user __force *)msg_sys->msg_control, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1954 | ctl_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | goto out_freectl; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1956 | msg_sys->msg_control = ctl_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | } |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1958 | msg_sys->msg_flags = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | |
| 1960 | if (sock->file->f_flags & O_NONBLOCK) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1961 | msg_sys->msg_flags |= MSG_DONTWAIT; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame^] | 1962 | /* |
| 1963 | * If this is sendmmsg() and current destination address is same as |
| 1964 | * previously succeeded address, omit asking LSM's decision. |
| 1965 | * used_address->name_len is initialized to UINT_MAX so that the first |
| 1966 | * destination address never matches. |
| 1967 | */ |
| 1968 | if (used_address && used_address->name_len == msg_sys->msg_namelen && |
| 1969 | !memcmp(&used_address->name, msg->msg_name, |
| 1970 | used_address->name_len)) { |
| 1971 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); |
| 1972 | goto out_freectl; |
| 1973 | } |
| 1974 | err = sock_sendmsg(sock, msg_sys, total_len); |
| 1975 | /* |
| 1976 | * If this is sendmmsg() and sending to current destination address was |
| 1977 | * successful, remember it. |
| 1978 | */ |
| 1979 | if (used_address && err >= 0) { |
| 1980 | used_address->name_len = msg_sys->msg_namelen; |
| 1981 | memcpy(&used_address->name, msg->msg_name, |
| 1982 | used_address->name_len); |
| 1983 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1984 | |
| 1985 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1986 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
| 1988 | out_freeiov: |
| 1989 | if (iov != iovstack) |
| 1990 | sock_kfree_s(sock->sk, iov, iov_size); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1991 | out: |
| 1992 | return err; |
| 1993 | } |
| 1994 | |
| 1995 | /* |
| 1996 | * BSD sendmsg interface |
| 1997 | */ |
| 1998 | |
| 1999 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
| 2000 | { |
| 2001 | int fput_needed, err; |
| 2002 | struct msghdr msg_sys; |
| 2003 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2004 | |
| 2005 | if (!sock) |
| 2006 | goto out; |
| 2007 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame^] | 2008 | err = __sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2009 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2010 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2011 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | return err; |
| 2013 | } |
| 2014 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2015 | /* |
| 2016 | * Linux sendmmsg interface |
| 2017 | */ |
| 2018 | |
| 2019 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2020 | unsigned int flags) |
| 2021 | { |
| 2022 | int fput_needed, err, datagrams; |
| 2023 | struct socket *sock; |
| 2024 | struct mmsghdr __user *entry; |
| 2025 | struct compat_mmsghdr __user *compat_entry; |
| 2026 | struct msghdr msg_sys; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame^] | 2027 | struct used_address used_address; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2028 | |
Anton Blanchard | 98382f4 | 2011-08-04 14:07:39 +0000 | [diff] [blame] | 2029 | if (vlen > UIO_MAXIOV) |
| 2030 | vlen = UIO_MAXIOV; |
| 2031 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2032 | datagrams = 0; |
| 2033 | |
| 2034 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2035 | if (!sock) |
| 2036 | return err; |
| 2037 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame^] | 2038 | used_address.name_len = UINT_MAX; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2039 | entry = mmsg; |
| 2040 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2041 | err = 0; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2042 | |
| 2043 | while (datagrams < vlen) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2044 | if (MSG_CMSG_COMPAT & flags) { |
| 2045 | err = __sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame^] | 2046 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2047 | if (err < 0) |
| 2048 | break; |
| 2049 | err = __put_user(err, &compat_entry->msg_len); |
| 2050 | ++compat_entry; |
| 2051 | } else { |
| 2052 | err = __sys_sendmsg(sock, (struct msghdr __user *)entry, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame^] | 2053 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2054 | if (err < 0) |
| 2055 | break; |
| 2056 | err = put_user(err, &entry->msg_len); |
| 2057 | ++entry; |
| 2058 | } |
| 2059 | |
| 2060 | if (err) |
| 2061 | break; |
| 2062 | ++datagrams; |
| 2063 | } |
| 2064 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2065 | fput_light(sock->file, fput_needed); |
| 2066 | |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2067 | /* We only return an error if no datagrams were able to be sent */ |
| 2068 | if (datagrams != 0) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2069 | return datagrams; |
| 2070 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2071 | return err; |
| 2072 | } |
| 2073 | |
| 2074 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2075 | unsigned int, vlen, unsigned int, flags) |
| 2076 | { |
| 2077 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
| 2078 | } |
| 2079 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2080 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
| 2081 | struct msghdr *msg_sys, unsigned flags, int nosec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2083 | struct compat_msghdr __user *msg_compat = |
| 2084 | (struct compat_msghdr __user *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | struct iovec iovstack[UIO_FASTIOV]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2086 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | unsigned long cmsg_ptr; |
| 2088 | int err, iov_size, total_len, len; |
| 2089 | |
| 2090 | /* kernel mode address */ |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2091 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | |
| 2093 | /* user mode address pointers */ |
| 2094 | struct sockaddr __user *uaddr; |
| 2095 | int __user *uaddr_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2096 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | if (MSG_CMSG_COMPAT & flags) { |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2098 | if (get_compat_msghdr(msg_sys, msg_compat)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | return -EFAULT; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2100 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2101 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | err = -EMSGSIZE; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2104 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
| 2105 | goto out; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2106 | |
| 2107 | /* Check whether to allocate the iovec area */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | err = -ENOMEM; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2109 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
| 2110 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
| 2112 | if (!iov) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2113 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | } |
| 2115 | |
| 2116 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2117 | * Save the user-mode address (verify_iovec will change the |
| 2118 | * kernel msghdr to use the kernel address space) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2120 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2121 | uaddr = (__force void __user *)msg_sys->msg_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | uaddr_len = COMPAT_NAMELEN(msg); |
| 2123 | if (MSG_CMSG_COMPAT & flags) { |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2124 | err = verify_compat_iovec(msg_sys, iov, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2125 | (struct sockaddr *)&addr, |
| 2126 | VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | } else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2128 | err = verify_iovec(msg_sys, iov, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2129 | (struct sockaddr *)&addr, |
| 2130 | VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | if (err < 0) |
| 2132 | goto out_freeiov; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2133 | total_len = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2135 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
| 2136 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | if (sock->file->f_flags & O_NONBLOCK) |
| 2139 | flags |= MSG_DONTWAIT; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2140 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
| 2141 | total_len, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | if (err < 0) |
| 2143 | goto out_freeiov; |
| 2144 | len = err; |
| 2145 | |
| 2146 | if (uaddr != NULL) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2147 | err = move_addr_to_user((struct sockaddr *)&addr, |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2148 | msg_sys->msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2149 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2150 | if (err < 0) |
| 2151 | goto out_freeiov; |
| 2152 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2153 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2154 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2155 | if (err) |
| 2156 | goto out_freeiov; |
| 2157 | if (MSG_CMSG_COMPAT & flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2158 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | &msg_compat->msg_controllen); |
| 2160 | else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2161 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | &msg->msg_controllen); |
| 2163 | if (err) |
| 2164 | goto out_freeiov; |
| 2165 | err = len; |
| 2166 | |
| 2167 | out_freeiov: |
| 2168 | if (iov != iovstack) |
| 2169 | sock_kfree_s(sock->sk, iov, iov_size); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2170 | out: |
| 2171 | return err; |
| 2172 | } |
| 2173 | |
| 2174 | /* |
| 2175 | * BSD recvmsg interface |
| 2176 | */ |
| 2177 | |
| 2178 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
| 2179 | unsigned int, flags) |
| 2180 | { |
| 2181 | int fput_needed, err; |
| 2182 | struct msghdr msg_sys; |
| 2183 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2184 | |
| 2185 | if (!sock) |
| 2186 | goto out; |
| 2187 | |
| 2188 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
| 2189 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2190 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2191 | out: |
| 2192 | return err; |
| 2193 | } |
| 2194 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2195 | /* |
| 2196 | * Linux recvmmsg interface |
| 2197 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2199 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2200 | unsigned int flags, struct timespec *timeout) |
| 2201 | { |
| 2202 | int fput_needed, err, datagrams; |
| 2203 | struct socket *sock; |
| 2204 | struct mmsghdr __user *entry; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2205 | struct compat_mmsghdr __user *compat_entry; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2206 | struct msghdr msg_sys; |
| 2207 | struct timespec end_time; |
| 2208 | |
| 2209 | if (timeout && |
| 2210 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
| 2211 | timeout->tv_nsec)) |
| 2212 | return -EINVAL; |
| 2213 | |
| 2214 | datagrams = 0; |
| 2215 | |
| 2216 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2217 | if (!sock) |
| 2218 | return err; |
| 2219 | |
| 2220 | err = sock_error(sock->sk); |
| 2221 | if (err) |
| 2222 | goto out_put; |
| 2223 | |
| 2224 | entry = mmsg; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2225 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2226 | |
| 2227 | while (datagrams < vlen) { |
| 2228 | /* |
| 2229 | * No need to ask LSM for more than the first datagram. |
| 2230 | */ |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2231 | if (MSG_CMSG_COMPAT & flags) { |
| 2232 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
Anton Blanchard | b9eb8b8 | 2011-05-17 15:38:57 -0400 | [diff] [blame] | 2233 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2234 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2235 | if (err < 0) |
| 2236 | break; |
| 2237 | err = __put_user(err, &compat_entry->msg_len); |
| 2238 | ++compat_entry; |
| 2239 | } else { |
| 2240 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, |
Anton Blanchard | b9eb8b8 | 2011-05-17 15:38:57 -0400 | [diff] [blame] | 2241 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2242 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2243 | if (err < 0) |
| 2244 | break; |
| 2245 | err = put_user(err, &entry->msg_len); |
| 2246 | ++entry; |
| 2247 | } |
| 2248 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2249 | if (err) |
| 2250 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2251 | ++datagrams; |
| 2252 | |
Brandon L Black | 71c5c159 | 2010-03-26 16:18:03 +0000 | [diff] [blame] | 2253 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
| 2254 | if (flags & MSG_WAITFORONE) |
| 2255 | flags |= MSG_DONTWAIT; |
| 2256 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2257 | if (timeout) { |
| 2258 | ktime_get_ts(timeout); |
| 2259 | *timeout = timespec_sub(end_time, *timeout); |
| 2260 | if (timeout->tv_sec < 0) { |
| 2261 | timeout->tv_sec = timeout->tv_nsec = 0; |
| 2262 | break; |
| 2263 | } |
| 2264 | |
| 2265 | /* Timeout, return less than vlen datagrams */ |
| 2266 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
| 2267 | break; |
| 2268 | } |
| 2269 | |
| 2270 | /* Out of band data, return right away */ |
| 2271 | if (msg_sys.msg_flags & MSG_OOB) |
| 2272 | break; |
| 2273 | } |
| 2274 | |
| 2275 | out_put: |
| 2276 | fput_light(sock->file, fput_needed); |
| 2277 | |
| 2278 | if (err == 0) |
| 2279 | return datagrams; |
| 2280 | |
| 2281 | if (datagrams != 0) { |
| 2282 | /* |
| 2283 | * We may return less entries than requested (vlen) if the |
| 2284 | * sock is non block and there aren't enough datagrams... |
| 2285 | */ |
| 2286 | if (err != -EAGAIN) { |
| 2287 | /* |
| 2288 | * ... or if recvmsg returns an error after we |
| 2289 | * received some datagrams, where we record the |
| 2290 | * error to return on the next call or if the |
| 2291 | * app asks about it using getsockopt(SO_ERROR). |
| 2292 | */ |
| 2293 | sock->sk->sk_err = -err; |
| 2294 | } |
| 2295 | |
| 2296 | return datagrams; |
| 2297 | } |
| 2298 | |
| 2299 | return err; |
| 2300 | } |
| 2301 | |
| 2302 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2303 | unsigned int, vlen, unsigned int, flags, |
| 2304 | struct timespec __user *, timeout) |
| 2305 | { |
| 2306 | int datagrams; |
| 2307 | struct timespec timeout_sys; |
| 2308 | |
| 2309 | if (!timeout) |
| 2310 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); |
| 2311 | |
| 2312 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) |
| 2313 | return -EFAULT; |
| 2314 | |
| 2315 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
| 2316 | |
| 2317 | if (datagrams > 0 && |
| 2318 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) |
| 2319 | datagrams = -EFAULT; |
| 2320 | |
| 2321 | return datagrams; |
| 2322 | } |
| 2323 | |
| 2324 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2325 | /* Argument list sizes for sys_socketcall */ |
| 2326 | #define AL(x) ((x) * sizeof(unsigned long)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2327 | static const unsigned char nargs[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2328 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 2329 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 2330 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2331 | AL(4), AL(5), AL(4) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2332 | }; |
| 2333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | #undef AL |
| 2335 | |
| 2336 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2337 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2338 | * |
| 2339 | * Argument checking cleaned up. Saved 20% in size. |
| 2340 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2341 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2342 | */ |
| 2343 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 2344 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | { |
| 2346 | unsigned long a[6]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2347 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | int err; |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2349 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2351 | if (call < 1 || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2352 | return -EINVAL; |
| 2353 | |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2354 | len = nargs[call]; |
| 2355 | if (len > sizeof(a)) |
| 2356 | return -EINVAL; |
| 2357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | /* copy_from_user should be SMP safe. */ |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2359 | if (copy_from_user(a, args, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2360 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2361 | |
Al Viro | f3298dc | 2008-12-10 03:16:51 -0500 | [diff] [blame] | 2362 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2363 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2364 | a0 = a[0]; |
| 2365 | a1 = a[1]; |
| 2366 | |
| 2367 | switch (call) { |
| 2368 | case SYS_SOCKET: |
| 2369 | err = sys_socket(a0, a1, a[2]); |
| 2370 | break; |
| 2371 | case SYS_BIND: |
| 2372 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
| 2373 | break; |
| 2374 | case SYS_CONNECT: |
| 2375 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
| 2376 | break; |
| 2377 | case SYS_LISTEN: |
| 2378 | err = sys_listen(a0, a1); |
| 2379 | break; |
| 2380 | case SYS_ACCEPT: |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2381 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2382 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2383 | break; |
| 2384 | case SYS_GETSOCKNAME: |
| 2385 | err = |
| 2386 | sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 2387 | (int __user *)a[2]); |
| 2388 | break; |
| 2389 | case SYS_GETPEERNAME: |
| 2390 | err = |
| 2391 | sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 2392 | (int __user *)a[2]); |
| 2393 | break; |
| 2394 | case SYS_SOCKETPAIR: |
| 2395 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
| 2396 | break; |
| 2397 | case SYS_SEND: |
| 2398 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); |
| 2399 | break; |
| 2400 | case SYS_SENDTO: |
| 2401 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 2402 | (struct sockaddr __user *)a[4], a[5]); |
| 2403 | break; |
| 2404 | case SYS_RECV: |
| 2405 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); |
| 2406 | break; |
| 2407 | case SYS_RECVFROM: |
| 2408 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 2409 | (struct sockaddr __user *)a[4], |
| 2410 | (int __user *)a[5]); |
| 2411 | break; |
| 2412 | case SYS_SHUTDOWN: |
| 2413 | err = sys_shutdown(a0, a1); |
| 2414 | break; |
| 2415 | case SYS_SETSOCKOPT: |
| 2416 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
| 2417 | break; |
| 2418 | case SYS_GETSOCKOPT: |
| 2419 | err = |
| 2420 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 2421 | (int __user *)a[4]); |
| 2422 | break; |
| 2423 | case SYS_SENDMSG: |
| 2424 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2425 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2426 | case SYS_SENDMMSG: |
| 2427 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); |
| 2428 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2429 | case SYS_RECVMSG: |
| 2430 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2431 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2432 | case SYS_RECVMMSG: |
| 2433 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], |
| 2434 | (struct timespec __user *)a[4]); |
| 2435 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2436 | case SYS_ACCEPT4: |
| 2437 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2438 | (int __user *)a[2], a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2439 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2440 | default: |
| 2441 | err = -EINVAL; |
| 2442 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2443 | } |
| 2444 | return err; |
| 2445 | } |
| 2446 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2447 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2448 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2449 | /** |
| 2450 | * sock_register - add a socket protocol handler |
| 2451 | * @ops: description of protocol |
| 2452 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2453 | * This function is called by a protocol handler that wants to |
| 2454 | * advertise its address family, and have it linked into the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2455 | * socket interface. The value ops->family coresponds to the |
| 2456 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2457 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2458 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2459 | { |
| 2460 | int err; |
| 2461 | |
| 2462 | if (ops->family >= NPROTO) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2463 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
| 2464 | NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | return -ENOBUFS; |
| 2466 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2467 | |
| 2468 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 2469 | if (rcu_dereference_protected(net_families[ops->family], |
| 2470 | lockdep_is_held(&net_family_lock))) |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2471 | err = -EEXIST; |
| 2472 | else { |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 2473 | rcu_assign_pointer(net_families[ops->family], ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2474 | err = 0; |
| 2475 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2476 | spin_unlock(&net_family_lock); |
| 2477 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2478 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | return err; |
| 2480 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2481 | EXPORT_SYMBOL(sock_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2482 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2483 | /** |
| 2484 | * sock_unregister - remove a protocol handler |
| 2485 | * @family: protocol family to remove |
| 2486 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | * This function is called by a protocol handler that wants to |
| 2488 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2489 | * new socket creation. |
| 2490 | * |
| 2491 | * If protocol handler is a module, then it can use module reference |
| 2492 | * counts to protect against new references. If protocol handler is not |
| 2493 | * a module then it needs to provide its own protection in |
| 2494 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2495 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2496 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2497 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2498 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2500 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 2501 | rcu_assign_pointer(net_families[family], NULL); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2502 | spin_unlock(&net_family_lock); |
| 2503 | |
| 2504 | synchronize_rcu(); |
| 2505 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2506 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2508 | EXPORT_SYMBOL(sock_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2509 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2510 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | { |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2512 | int err; |
| 2513 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2514 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2515 | * Initialize sock SLAB cache. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2516 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | sk_init(); |
| 2519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2520 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2521 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2522 | */ |
| 2523 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2524 | |
| 2525 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2526 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | */ |
| 2528 | |
| 2529 | init_inodecache(); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2530 | |
| 2531 | err = register_filesystem(&sock_fs_type); |
| 2532 | if (err) |
| 2533 | goto out_fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2534 | sock_mnt = kern_mount(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2535 | if (IS_ERR(sock_mnt)) { |
| 2536 | err = PTR_ERR(sock_mnt); |
| 2537 | goto out_mount; |
| 2538 | } |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2539 | |
| 2540 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2541 | */ |
| 2542 | |
| 2543 | #ifdef CONFIG_NETFILTER |
| 2544 | netfilter_init(); |
| 2545 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 2546 | |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 2547 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
| 2548 | skb_timestamping_init(); |
| 2549 | #endif |
| 2550 | |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2551 | out: |
| 2552 | return err; |
| 2553 | |
| 2554 | out_mount: |
| 2555 | unregister_filesystem(&sock_fs_type); |
| 2556 | out_fs: |
| 2557 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | } |
| 2559 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2560 | core_initcall(sock_init); /* early initcall */ |
| 2561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2562 | #ifdef CONFIG_PROC_FS |
| 2563 | void socket_seq_show(struct seq_file *seq) |
| 2564 | { |
| 2565 | int cpu; |
| 2566 | int counter = 0; |
| 2567 | |
KAMEZAWA Hiroyuki | 6f91204 | 2006-04-10 22:52:50 -0700 | [diff] [blame] | 2568 | for_each_possible_cpu(cpu) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2569 | counter += per_cpu(sockets_in_use, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | |
| 2571 | /* It can be negative, by the way. 8) */ |
| 2572 | if (counter < 0) |
| 2573 | counter = 0; |
| 2574 | |
| 2575 | seq_printf(seq, "sockets: used %d\n", counter); |
| 2576 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2577 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2579 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2580 | static int do_siocgstamp(struct net *net, struct socket *sock, |
| 2581 | unsigned int cmd, struct compat_timeval __user *up) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2582 | { |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2583 | mm_segment_t old_fs = get_fs(); |
| 2584 | struct timeval ktv; |
| 2585 | int err; |
| 2586 | |
| 2587 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2588 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2589 | set_fs(old_fs); |
| 2590 | if (!err) { |
| 2591 | err = put_user(ktv.tv_sec, &up->tv_sec); |
| 2592 | err |= __put_user(ktv.tv_usec, &up->tv_usec); |
| 2593 | } |
| 2594 | return err; |
| 2595 | } |
| 2596 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2597 | static int do_siocgstampns(struct net *net, struct socket *sock, |
| 2598 | unsigned int cmd, struct compat_timespec __user *up) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2599 | { |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2600 | mm_segment_t old_fs = get_fs(); |
| 2601 | struct timespec kts; |
| 2602 | int err; |
| 2603 | |
| 2604 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2605 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2606 | set_fs(old_fs); |
| 2607 | if (!err) { |
| 2608 | err = put_user(kts.tv_sec, &up->tv_sec); |
| 2609 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); |
| 2610 | } |
| 2611 | return err; |
| 2612 | } |
| 2613 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2614 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2615 | { |
| 2616 | struct ifreq __user *uifr; |
| 2617 | int err; |
| 2618 | |
| 2619 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2620 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2621 | return -EFAULT; |
| 2622 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2623 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2624 | if (err) |
| 2625 | return err; |
| 2626 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2627 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2628 | return -EFAULT; |
| 2629 | |
| 2630 | return 0; |
| 2631 | } |
| 2632 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2633 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2634 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2635 | struct compat_ifconf ifc32; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2636 | struct ifconf ifc; |
| 2637 | struct ifconf __user *uifc; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2638 | struct compat_ifreq __user *ifr32; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2639 | struct ifreq __user *ifr; |
| 2640 | unsigned int i, j; |
| 2641 | int err; |
| 2642 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2643 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2644 | return -EFAULT; |
| 2645 | |
| 2646 | if (ifc32.ifcbuf == 0) { |
| 2647 | ifc32.ifc_len = 0; |
| 2648 | ifc.ifc_len = 0; |
| 2649 | ifc.ifc_req = NULL; |
| 2650 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); |
| 2651 | } else { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2652 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
| 2653 | sizeof(struct ifreq); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2654 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
| 2655 | ifc.ifc_len = len; |
| 2656 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); |
| 2657 | ifr32 = compat_ptr(ifc32.ifcbuf); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2658 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2659 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2660 | return -EFAULT; |
| 2661 | ifr++; |
| 2662 | ifr32++; |
| 2663 | } |
| 2664 | } |
| 2665 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) |
| 2666 | return -EFAULT; |
| 2667 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2668 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2669 | if (err) |
| 2670 | return err; |
| 2671 | |
| 2672 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) |
| 2673 | return -EFAULT; |
| 2674 | |
| 2675 | ifr = ifc.ifc_req; |
| 2676 | ifr32 = compat_ptr(ifc32.ifcbuf); |
| 2677 | for (i = 0, j = 0; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2678 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
| 2679 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { |
| 2680 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2681 | return -EFAULT; |
| 2682 | ifr32++; |
| 2683 | ifr++; |
| 2684 | } |
| 2685 | |
| 2686 | if (ifc32.ifcbuf == 0) { |
| 2687 | /* Translate from 64-bit structure multiple to |
| 2688 | * a 32-bit one. |
| 2689 | */ |
| 2690 | i = ifc.ifc_len; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2691 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2692 | ifc32.ifc_len = i; |
| 2693 | } else { |
| 2694 | ifc32.ifc_len = i; |
| 2695 | } |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2696 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2697 | return -EFAULT; |
| 2698 | |
| 2699 | return 0; |
| 2700 | } |
| 2701 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2702 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2703 | { |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2704 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
| 2705 | bool convert_in = false, convert_out = false; |
| 2706 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); |
| 2707 | struct ethtool_rxnfc __user *rxnfc; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2708 | struct ifreq __user *ifr; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2709 | u32 rule_cnt = 0, actual_rule_cnt; |
| 2710 | u32 ethcmd; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2711 | u32 data; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2712 | int ret; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2713 | |
| 2714 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2715 | return -EFAULT; |
| 2716 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2717 | compat_rxnfc = compat_ptr(data); |
| 2718 | |
| 2719 | if (get_user(ethcmd, &compat_rxnfc->cmd)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2720 | return -EFAULT; |
| 2721 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2722 | /* Most ethtool structures are defined without padding. |
| 2723 | * Unfortunately struct ethtool_rxnfc is an exception. |
| 2724 | */ |
| 2725 | switch (ethcmd) { |
| 2726 | default: |
| 2727 | break; |
| 2728 | case ETHTOOL_GRXCLSRLALL: |
| 2729 | /* Buffer size is variable */ |
| 2730 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) |
| 2731 | return -EFAULT; |
| 2732 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) |
| 2733 | return -ENOMEM; |
| 2734 | buf_size += rule_cnt * sizeof(u32); |
| 2735 | /* fall through */ |
| 2736 | case ETHTOOL_GRXRINGS: |
| 2737 | case ETHTOOL_GRXCLSRLCNT: |
| 2738 | case ETHTOOL_GRXCLSRULE: |
| 2739 | convert_out = true; |
| 2740 | /* fall through */ |
| 2741 | case ETHTOOL_SRXCLSRLDEL: |
| 2742 | case ETHTOOL_SRXCLSRLINS: |
| 2743 | buf_size += sizeof(struct ethtool_rxnfc); |
| 2744 | convert_in = true; |
| 2745 | break; |
| 2746 | } |
| 2747 | |
| 2748 | ifr = compat_alloc_user_space(buf_size); |
| 2749 | rxnfc = (void *)ifr + ALIGN(sizeof(struct ifreq), 8); |
| 2750 | |
| 2751 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2752 | return -EFAULT; |
| 2753 | |
| 2754 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
| 2755 | &ifr->ifr_ifru.ifru_data)) |
| 2756 | return -EFAULT; |
| 2757 | |
| 2758 | if (convert_in) { |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2759 | /* We expect there to be holes between fs.m_ext and |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2760 | * fs.ring_cookie and at the end of fs, but nowhere else. |
| 2761 | */ |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2762 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
| 2763 | sizeof(compat_rxnfc->fs.m_ext) != |
| 2764 | offsetof(struct ethtool_rxnfc, fs.m_ext) + |
| 2765 | sizeof(rxnfc->fs.m_ext)); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2766 | BUILD_BUG_ON( |
| 2767 | offsetof(struct compat_ethtool_rxnfc, fs.location) - |
| 2768 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != |
| 2769 | offsetof(struct ethtool_rxnfc, fs.location) - |
| 2770 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); |
| 2771 | |
| 2772 | if (copy_in_user(rxnfc, compat_rxnfc, |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2773 | (void *)(&rxnfc->fs.m_ext + 1) - |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2774 | (void *)rxnfc) || |
| 2775 | copy_in_user(&rxnfc->fs.ring_cookie, |
| 2776 | &compat_rxnfc->fs.ring_cookie, |
| 2777 | (void *)(&rxnfc->fs.location + 1) - |
| 2778 | (void *)&rxnfc->fs.ring_cookie) || |
| 2779 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
| 2780 | sizeof(rxnfc->rule_cnt))) |
| 2781 | return -EFAULT; |
| 2782 | } |
| 2783 | |
| 2784 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); |
| 2785 | if (ret) |
| 2786 | return ret; |
| 2787 | |
| 2788 | if (convert_out) { |
| 2789 | if (copy_in_user(compat_rxnfc, rxnfc, |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2790 | (const void *)(&rxnfc->fs.m_ext + 1) - |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2791 | (const void *)rxnfc) || |
| 2792 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
| 2793 | &rxnfc->fs.ring_cookie, |
| 2794 | (const void *)(&rxnfc->fs.location + 1) - |
| 2795 | (const void *)&rxnfc->fs.ring_cookie) || |
| 2796 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
| 2797 | sizeof(rxnfc->rule_cnt))) |
| 2798 | return -EFAULT; |
| 2799 | |
| 2800 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { |
| 2801 | /* As an optimisation, we only copy the actual |
| 2802 | * number of rules that the underlying |
| 2803 | * function returned. Since Mallory might |
| 2804 | * change the rule count in user memory, we |
| 2805 | * check that it is less than the rule count |
| 2806 | * originally given (as the user buffer size), |
| 2807 | * which has been range-checked. |
| 2808 | */ |
| 2809 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) |
| 2810 | return -EFAULT; |
| 2811 | if (actual_rule_cnt < rule_cnt) |
| 2812 | rule_cnt = actual_rule_cnt; |
| 2813 | if (copy_in_user(&compat_rxnfc->rule_locs[0], |
| 2814 | &rxnfc->rule_locs[0], |
| 2815 | rule_cnt * sizeof(u32))) |
| 2816 | return -EFAULT; |
| 2817 | } |
| 2818 | } |
| 2819 | |
| 2820 | return 0; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2821 | } |
| 2822 | |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2823 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
| 2824 | { |
| 2825 | void __user *uptr; |
| 2826 | compat_uptr_t uptr32; |
| 2827 | struct ifreq __user *uifr; |
| 2828 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2829 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2830 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 2831 | return -EFAULT; |
| 2832 | |
| 2833 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
| 2834 | return -EFAULT; |
| 2835 | |
| 2836 | uptr = compat_ptr(uptr32); |
| 2837 | |
| 2838 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) |
| 2839 | return -EFAULT; |
| 2840 | |
| 2841 | return dev_ioctl(net, SIOCWANDEV, uifr); |
| 2842 | } |
| 2843 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2844 | static int bond_ioctl(struct net *net, unsigned int cmd, |
| 2845 | struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2846 | { |
| 2847 | struct ifreq kifr; |
| 2848 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2849 | mm_segment_t old_fs; |
| 2850 | int err; |
| 2851 | u32 data; |
| 2852 | void __user *datap; |
| 2853 | |
| 2854 | switch (cmd) { |
| 2855 | case SIOCBONDENSLAVE: |
| 2856 | case SIOCBONDRELEASE: |
| 2857 | case SIOCBONDSETHWADDR: |
| 2858 | case SIOCBONDCHANGEACTIVE: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2859 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2860 | return -EFAULT; |
| 2861 | |
| 2862 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2863 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 2864 | err = dev_ioctl(net, cmd, |
| 2865 | (struct ifreq __user __force *) &kifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2866 | set_fs(old_fs); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2867 | |
| 2868 | return err; |
| 2869 | case SIOCBONDSLAVEINFOQUERY: |
| 2870 | case SIOCBONDINFOQUERY: |
| 2871 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 2872 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2873 | return -EFAULT; |
| 2874 | |
| 2875 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2876 | return -EFAULT; |
| 2877 | |
| 2878 | datap = compat_ptr(data); |
| 2879 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) |
| 2880 | return -EFAULT; |
| 2881 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2882 | return dev_ioctl(net, cmd, uifr); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2883 | default: |
| 2884 | return -EINVAL; |
Joe Perches | ccbd6a5 | 2010-05-14 10:58:26 +0000 | [diff] [blame] | 2885 | } |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2886 | } |
| 2887 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2888 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
| 2889 | struct compat_ifreq __user *u_ifreq32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2890 | { |
| 2891 | struct ifreq __user *u_ifreq64; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2892 | char tmp_buf[IFNAMSIZ]; |
| 2893 | void __user *data64; |
| 2894 | u32 data32; |
| 2895 | |
| 2896 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), |
| 2897 | IFNAMSIZ)) |
| 2898 | return -EFAULT; |
| 2899 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
| 2900 | return -EFAULT; |
| 2901 | data64 = compat_ptr(data32); |
| 2902 | |
| 2903 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); |
| 2904 | |
| 2905 | /* Don't check these user accesses, just let that get trapped |
| 2906 | * in the ioctl handler instead. |
| 2907 | */ |
| 2908 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
| 2909 | IFNAMSIZ)) |
| 2910 | return -EFAULT; |
| 2911 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
| 2912 | return -EFAULT; |
| 2913 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2914 | return dev_ioctl(net, cmd, u_ifreq64); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2915 | } |
| 2916 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2917 | static int dev_ifsioc(struct net *net, struct socket *sock, |
| 2918 | unsigned int cmd, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2919 | { |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2920 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2921 | int err; |
| 2922 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2923 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 2924 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) |
| 2925 | return -EFAULT; |
| 2926 | |
| 2927 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); |
| 2928 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2929 | if (!err) { |
| 2930 | switch (cmd) { |
| 2931 | case SIOCGIFFLAGS: |
| 2932 | case SIOCGIFMETRIC: |
| 2933 | case SIOCGIFMTU: |
| 2934 | case SIOCGIFMEM: |
| 2935 | case SIOCGIFHWADDR: |
| 2936 | case SIOCGIFINDEX: |
| 2937 | case SIOCGIFADDR: |
| 2938 | case SIOCGIFBRDADDR: |
| 2939 | case SIOCGIFDSTADDR: |
| 2940 | case SIOCGIFNETMASK: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 2941 | case SIOCGIFPFLAGS: |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2942 | case SIOCGIFTXQLEN: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 2943 | case SIOCGMIIPHY: |
| 2944 | case SIOCGMIIREG: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2945 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2946 | err = -EFAULT; |
| 2947 | break; |
| 2948 | } |
| 2949 | } |
| 2950 | return err; |
| 2951 | } |
| 2952 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2953 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
| 2954 | struct compat_ifreq __user *uifr32) |
| 2955 | { |
| 2956 | struct ifreq ifr; |
| 2957 | struct compat_ifmap __user *uifmap32; |
| 2958 | mm_segment_t old_fs; |
| 2959 | int err; |
| 2960 | |
| 2961 | uifmap32 = &uifr32->ifr_ifru.ifru_map; |
| 2962 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); |
| 2963 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 2964 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 2965 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 2966 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 2967 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 2968 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); |
| 2969 | if (err) |
| 2970 | return -EFAULT; |
| 2971 | |
| 2972 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2973 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 2974 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2975 | set_fs(old_fs); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2976 | |
| 2977 | if (cmd == SIOCGIFMAP && !err) { |
| 2978 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); |
| 2979 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 2980 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 2981 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 2982 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 2983 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 2984 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); |
| 2985 | if (err) |
| 2986 | err = -EFAULT; |
| 2987 | } |
| 2988 | return err; |
| 2989 | } |
| 2990 | |
| 2991 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) |
| 2992 | { |
| 2993 | void __user *uptr; |
| 2994 | compat_uptr_t uptr32; |
| 2995 | struct ifreq __user *uifr; |
| 2996 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2997 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2998 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 2999 | return -EFAULT; |
| 3000 | |
| 3001 | if (get_user(uptr32, &uifr32->ifr_data)) |
| 3002 | return -EFAULT; |
| 3003 | |
| 3004 | uptr = compat_ptr(uptr32); |
| 3005 | |
| 3006 | if (put_user(uptr, &uifr->ifr_data)) |
| 3007 | return -EFAULT; |
| 3008 | |
| 3009 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); |
| 3010 | } |
| 3011 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3012 | struct rtentry32 { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3013 | u32 rt_pad1; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3014 | struct sockaddr rt_dst; /* target address */ |
| 3015 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ |
| 3016 | struct sockaddr rt_genmask; /* target network mask (IP) */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3017 | unsigned short rt_flags; |
| 3018 | short rt_pad2; |
| 3019 | u32 rt_pad3; |
| 3020 | unsigned char rt_tos; |
| 3021 | unsigned char rt_class; |
| 3022 | short rt_pad4; |
| 3023 | short rt_metric; /* +1 for binary compatibility! */ |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3024 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3025 | u32 rt_mtu; /* per route MTU/Window */ |
| 3026 | u32 rt_window; /* Window clamping */ |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3027 | unsigned short rt_irtt; /* Initial RTT */ |
| 3028 | }; |
| 3029 | |
| 3030 | struct in6_rtmsg32 { |
| 3031 | struct in6_addr rtmsg_dst; |
| 3032 | struct in6_addr rtmsg_src; |
| 3033 | struct in6_addr rtmsg_gateway; |
| 3034 | u32 rtmsg_type; |
| 3035 | u16 rtmsg_dst_len; |
| 3036 | u16 rtmsg_src_len; |
| 3037 | u32 rtmsg_metric; |
| 3038 | u32 rtmsg_info; |
| 3039 | u32 rtmsg_flags; |
| 3040 | s32 rtmsg_ifindex; |
| 3041 | }; |
| 3042 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3043 | static int routing_ioctl(struct net *net, struct socket *sock, |
| 3044 | unsigned int cmd, void __user *argp) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3045 | { |
| 3046 | int ret; |
| 3047 | void *r = NULL; |
| 3048 | struct in6_rtmsg r6; |
| 3049 | struct rtentry r4; |
| 3050 | char devname[16]; |
| 3051 | u32 rtdev; |
| 3052 | mm_segment_t old_fs = get_fs(); |
| 3053 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3054 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
| 3055 | struct in6_rtmsg32 __user *ur6 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3056 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3057 | 3 * sizeof(struct in6_addr)); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3058 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
| 3059 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); |
| 3060 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); |
| 3061 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); |
| 3062 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); |
| 3063 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); |
| 3064 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3065 | |
| 3066 | r = (void *) &r6; |
| 3067 | } else { /* ipv4 */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3068 | struct rtentry32 __user *ur4 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3069 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3070 | 3 * sizeof(struct sockaddr)); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3071 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
| 3072 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); |
| 3073 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); |
| 3074 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); |
| 3075 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); |
| 3076 | ret |= __get_user(rtdev, &(ur4->rt_dev)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3077 | if (rtdev) { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3078 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3079 | r4.rt_dev = (char __user __force *)devname; |
| 3080 | devname[15] = 0; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3081 | } else |
| 3082 | r4.rt_dev = NULL; |
| 3083 | |
| 3084 | r = (void *) &r4; |
| 3085 | } |
| 3086 | |
| 3087 | if (ret) { |
| 3088 | ret = -EFAULT; |
| 3089 | goto out; |
| 3090 | } |
| 3091 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3092 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3093 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3094 | set_fs(old_fs); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3095 | |
| 3096 | out: |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3097 | return ret; |
| 3098 | } |
| 3099 | |
| 3100 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE |
| 3101 | * for some operations; this forces use of the newer bridge-utils that |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3102 | * use compatible ioctls |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3103 | */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3104 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3105 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3106 | compat_ulong_t tmp; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3107 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3108 | if (get_user(tmp, argp)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3109 | return -EFAULT; |
| 3110 | if (tmp == BRCTL_GET_VERSION) |
| 3111 | return BRCTL_VERSION + 1; |
| 3112 | return -EINVAL; |
| 3113 | } |
| 3114 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3115 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
| 3116 | unsigned int cmd, unsigned long arg) |
| 3117 | { |
| 3118 | void __user *argp = compat_ptr(arg); |
| 3119 | struct sock *sk = sock->sk; |
| 3120 | struct net *net = sock_net(sk); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3121 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3122 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
| 3123 | return siocdevprivate_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3124 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3125 | switch (cmd) { |
| 3126 | case SIOCSIFBR: |
| 3127 | case SIOCGIFBR: |
| 3128 | return old_bridge_ioctl(argp); |
| 3129 | case SIOCGIFNAME: |
| 3130 | return dev_ifname32(net, argp); |
| 3131 | case SIOCGIFCONF: |
| 3132 | return dev_ifconf(net, argp); |
| 3133 | case SIOCETHTOOL: |
| 3134 | return ethtool_ioctl(net, argp); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3135 | case SIOCWANDEV: |
| 3136 | return compat_siocwandev(net, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3137 | case SIOCGIFMAP: |
| 3138 | case SIOCSIFMAP: |
| 3139 | return compat_sioc_ifmap(net, cmd, argp); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3140 | case SIOCBONDENSLAVE: |
| 3141 | case SIOCBONDRELEASE: |
| 3142 | case SIOCBONDSETHWADDR: |
| 3143 | case SIOCBONDSLAVEINFOQUERY: |
| 3144 | case SIOCBONDINFOQUERY: |
| 3145 | case SIOCBONDCHANGEACTIVE: |
| 3146 | return bond_ioctl(net, cmd, argp); |
| 3147 | case SIOCADDRT: |
| 3148 | case SIOCDELRT: |
| 3149 | return routing_ioctl(net, sock, cmd, argp); |
| 3150 | case SIOCGSTAMP: |
| 3151 | return do_siocgstamp(net, sock, cmd, argp); |
| 3152 | case SIOCGSTAMPNS: |
| 3153 | return do_siocgstampns(net, sock, cmd, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3154 | case SIOCSHWTSTAMP: |
| 3155 | return compat_siocshwtstamp(net, argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3156 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3157 | case FIOSETOWN: |
| 3158 | case SIOCSPGRP: |
| 3159 | case FIOGETOWN: |
| 3160 | case SIOCGPGRP: |
| 3161 | case SIOCBRADDBR: |
| 3162 | case SIOCBRDELBR: |
| 3163 | case SIOCGIFVLAN: |
| 3164 | case SIOCSIFVLAN: |
| 3165 | case SIOCADDDLCI: |
| 3166 | case SIOCDELDLCI: |
| 3167 | return sock_ioctl(file, cmd, arg); |
| 3168 | |
| 3169 | case SIOCGIFFLAGS: |
| 3170 | case SIOCSIFFLAGS: |
| 3171 | case SIOCGIFMETRIC: |
| 3172 | case SIOCSIFMETRIC: |
| 3173 | case SIOCGIFMTU: |
| 3174 | case SIOCSIFMTU: |
| 3175 | case SIOCGIFMEM: |
| 3176 | case SIOCSIFMEM: |
| 3177 | case SIOCGIFHWADDR: |
| 3178 | case SIOCSIFHWADDR: |
| 3179 | case SIOCADDMULTI: |
| 3180 | case SIOCDELMULTI: |
| 3181 | case SIOCGIFINDEX: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3182 | case SIOCGIFADDR: |
| 3183 | case SIOCSIFADDR: |
| 3184 | case SIOCSIFHWBROADCAST: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3185 | case SIOCDIFADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3186 | case SIOCGIFBRDADDR: |
| 3187 | case SIOCSIFBRDADDR: |
| 3188 | case SIOCGIFDSTADDR: |
| 3189 | case SIOCSIFDSTADDR: |
| 3190 | case SIOCGIFNETMASK: |
| 3191 | case SIOCSIFNETMASK: |
| 3192 | case SIOCSIFPFLAGS: |
| 3193 | case SIOCGIFPFLAGS: |
| 3194 | case SIOCGIFTXQLEN: |
| 3195 | case SIOCSIFTXQLEN: |
| 3196 | case SIOCBRADDIF: |
| 3197 | case SIOCBRDELIF: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3198 | case SIOCSIFNAME: |
| 3199 | case SIOCGMIIPHY: |
| 3200 | case SIOCGMIIREG: |
| 3201 | case SIOCSMIIREG: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3202 | return dev_ifsioc(net, sock, cmd, argp); |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3203 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3204 | case SIOCSARP: |
| 3205 | case SIOCGARP: |
| 3206 | case SIOCDARP: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3207 | case SIOCATMARK: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3208 | return sock_do_ioctl(net, sock, cmd, arg); |
| 3209 | } |
| 3210 | |
| 3211 | /* Prevent warning from compat_sys_ioctl, these always |
| 3212 | * result in -EINVAL in the native case anyway. */ |
| 3213 | switch (cmd) { |
| 3214 | case SIOCRTMSG: |
| 3215 | case SIOCGIFCOUNT: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3216 | case SIOCSRARP: |
| 3217 | case SIOCGRARP: |
| 3218 | case SIOCDRARP: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3219 | case SIOCSIFLINK: |
| 3220 | case SIOCGIFSLAVE: |
| 3221 | case SIOCSIFSLAVE: |
| 3222 | return -EINVAL; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3223 | } |
| 3224 | |
| 3225 | return -ENOIOCTLCMD; |
| 3226 | } |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3227 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3228 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3229 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3230 | { |
| 3231 | struct socket *sock = file->private_data; |
| 3232 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3233 | struct sock *sk; |
| 3234 | struct net *net; |
| 3235 | |
| 3236 | sk = sock->sk; |
| 3237 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3238 | |
| 3239 | if (sock->ops->compat_ioctl) |
| 3240 | ret = sock->ops->compat_ioctl(sock, cmd, arg); |
| 3241 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3242 | if (ret == -ENOIOCTLCMD && |
| 3243 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 3244 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 3245 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3246 | if (ret == -ENOIOCTLCMD) |
| 3247 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
| 3248 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3249 | return ret; |
| 3250 | } |
| 3251 | #endif |
| 3252 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3253 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 3254 | { |
| 3255 | return sock->ops->bind(sock, addr, addrlen); |
| 3256 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3257 | EXPORT_SYMBOL(kernel_bind); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3258 | |
| 3259 | int kernel_listen(struct socket *sock, int backlog) |
| 3260 | { |
| 3261 | return sock->ops->listen(sock, backlog); |
| 3262 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3263 | EXPORT_SYMBOL(kernel_listen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3264 | |
| 3265 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 3266 | { |
| 3267 | struct sock *sk = sock->sk; |
| 3268 | int err; |
| 3269 | |
| 3270 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 3271 | newsock); |
| 3272 | if (err < 0) |
| 3273 | goto done; |
| 3274 | |
| 3275 | err = sock->ops->accept(sock, *newsock, flags); |
| 3276 | if (err < 0) { |
| 3277 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 3278 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3279 | goto done; |
| 3280 | } |
| 3281 | |
| 3282 | (*newsock)->ops = sock->ops; |
Wei Yongjun | 1b08534 | 2008-12-18 19:35:10 -0800 | [diff] [blame] | 3283 | __module_get((*newsock)->ops->owner); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3284 | |
| 3285 | done: |
| 3286 | return err; |
| 3287 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3288 | EXPORT_SYMBOL(kernel_accept); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3289 | |
| 3290 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 3291 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3292 | { |
| 3293 | return sock->ops->connect(sock, addr, addrlen, flags); |
| 3294 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3295 | EXPORT_SYMBOL(kernel_connect); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3296 | |
| 3297 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
| 3298 | int *addrlen) |
| 3299 | { |
| 3300 | return sock->ops->getname(sock, addr, addrlen, 0); |
| 3301 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3302 | EXPORT_SYMBOL(kernel_getsockname); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3303 | |
| 3304 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
| 3305 | int *addrlen) |
| 3306 | { |
| 3307 | return sock->ops->getname(sock, addr, addrlen, 1); |
| 3308 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3309 | EXPORT_SYMBOL(kernel_getpeername); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3310 | |
| 3311 | int kernel_getsockopt(struct socket *sock, int level, int optname, |
| 3312 | char *optval, int *optlen) |
| 3313 | { |
| 3314 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3315 | char __user *uoptval; |
| 3316 | int __user *uoptlen; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3317 | int err; |
| 3318 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3319 | uoptval = (char __user __force *) optval; |
| 3320 | uoptlen = (int __user __force *) optlen; |
| 3321 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3322 | set_fs(KERNEL_DS); |
| 3323 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3324 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3325 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3326 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
| 3327 | uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3328 | set_fs(oldfs); |
| 3329 | return err; |
| 3330 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3331 | EXPORT_SYMBOL(kernel_getsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3332 | |
| 3333 | int kernel_setsockopt(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3334 | char *optval, unsigned int optlen) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3335 | { |
| 3336 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3337 | char __user *uoptval; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3338 | int err; |
| 3339 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3340 | uoptval = (char __user __force *) optval; |
| 3341 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3342 | set_fs(KERNEL_DS); |
| 3343 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3344 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3345 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3346 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3347 | optlen); |
| 3348 | set_fs(oldfs); |
| 3349 | return err; |
| 3350 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3351 | EXPORT_SYMBOL(kernel_setsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3352 | |
| 3353 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
| 3354 | size_t size, int flags) |
| 3355 | { |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 3356 | sock_update_classid(sock->sk); |
| 3357 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3358 | if (sock->ops->sendpage) |
| 3359 | return sock->ops->sendpage(sock, page, offset, size, flags); |
| 3360 | |
| 3361 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 3362 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3363 | EXPORT_SYMBOL(kernel_sendpage); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3364 | |
| 3365 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
| 3366 | { |
| 3367 | mm_segment_t oldfs = get_fs(); |
| 3368 | int err; |
| 3369 | |
| 3370 | set_fs(KERNEL_DS); |
| 3371 | err = sock->ops->ioctl(sock, cmd, arg); |
| 3372 | set_fs(oldfs); |
| 3373 | |
| 3374 | return err; |
| 3375 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3376 | EXPORT_SYMBOL(kernel_sock_ioctl); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3377 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3378 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 3379 | { |
| 3380 | return sock->ops->shutdown(sock, how); |
| 3381 | } |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3382 | EXPORT_SYMBOL(kernel_sock_shutdown); |