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 | eaefd11 | 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 | eaefd11 | 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 | eaefd11 | 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 | eaefd11 | 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 | eaefd11 | 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 | eaefd11 | 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; |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 541 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
| 542 | *tx_flags |= SKBTX_WIFI_STATUS; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 543 | return 0; |
| 544 | } |
| 545 | EXPORT_SYMBOL(sock_tx_timestamp); |
| 546 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 547 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 548 | struct msghdr *msg, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | { |
| 550 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 552 | sock_update_classid(sock->sk); |
| 553 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | si->sock = sock; |
| 555 | si->scm = NULL; |
| 556 | si->msg = msg; |
| 557 | si->size = size; |
| 558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | return sock->ops->sendmsg(iocb, sock, msg, size); |
| 560 | } |
| 561 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 562 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 563 | struct msghdr *msg, size_t size) |
| 564 | { |
| 565 | int err = security_socket_sendmsg(sock, msg, size); |
| 566 | |
| 567 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); |
| 568 | } |
| 569 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
| 571 | { |
| 572 | struct kiocb iocb; |
| 573 | struct sock_iocb siocb; |
| 574 | int ret; |
| 575 | |
| 576 | init_sync_kiocb(&iocb, NULL); |
| 577 | iocb.private = &siocb; |
| 578 | ret = __sock_sendmsg(&iocb, sock, msg, size); |
| 579 | if (-EIOCBQUEUED == ret) |
| 580 | ret = wait_on_sync_kiocb(&iocb); |
| 581 | return ret; |
| 582 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 583 | EXPORT_SYMBOL(sock_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
Eric Dumazet | 894dc24 | 2011-07-26 02:39:41 +0000 | [diff] [blame] | 585 | 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] | 586 | { |
| 587 | struct kiocb iocb; |
| 588 | struct sock_iocb siocb; |
| 589 | int ret; |
| 590 | |
| 591 | init_sync_kiocb(&iocb, NULL); |
| 592 | iocb.private = &siocb; |
| 593 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); |
| 594 | if (-EIOCBQUEUED == ret) |
| 595 | ret = wait_on_sync_kiocb(&iocb); |
| 596 | return ret; |
| 597 | } |
| 598 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 600 | struct kvec *vec, size_t num, size_t size) |
| 601 | { |
| 602 | mm_segment_t oldfs = get_fs(); |
| 603 | int result; |
| 604 | |
| 605 | set_fs(KERNEL_DS); |
| 606 | /* |
| 607 | * the following is safe, since for compiler definitions of kvec and |
| 608 | * iovec are identical, yielding the same in-core layout and alignment |
| 609 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 610 | msg->msg_iov = (struct iovec *)vec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | msg->msg_iovlen = num; |
| 612 | result = sock_sendmsg(sock, msg, size); |
| 613 | set_fs(oldfs); |
| 614 | return result; |
| 615 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 616 | EXPORT_SYMBOL(kernel_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 618 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
| 619 | { |
| 620 | if (kt.tv64) { |
| 621 | *ts = ktime_to_timespec(kt); |
| 622 | return 1; |
| 623 | } else { |
| 624 | return 0; |
| 625 | } |
| 626 | } |
| 627 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 628 | /* |
| 629 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 630 | */ |
| 631 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 632 | struct sk_buff *skb) |
| 633 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 634 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
| 635 | struct timespec ts[3]; |
| 636 | int empty = 1; |
| 637 | struct skb_shared_hwtstamps *shhwtstamps = |
| 638 | skb_hwtstamps(skb); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 639 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 640 | /* Race occurred between timestamp enabling and packet |
| 641 | receiving. Fill in the current time for now. */ |
| 642 | if (need_software_tstamp && skb->tstamp.tv64 == 0) |
| 643 | __net_timestamp(skb); |
| 644 | |
| 645 | if (need_software_tstamp) { |
| 646 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
| 647 | struct timeval tv; |
| 648 | skb_get_timestamp(skb, &tv); |
| 649 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, |
| 650 | sizeof(tv), &tv); |
| 651 | } else { |
Hagen Paul Pfeifer | 842509b | 2010-04-06 05:39:52 +0000 | [diff] [blame] | 652 | skb_get_timestampns(skb, &ts[0]); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 653 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
Hagen Paul Pfeifer | 842509b | 2010-04-06 05:39:52 +0000 | [diff] [blame] | 654 | sizeof(ts[0]), &ts[0]); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 655 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 656 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 657 | |
| 658 | |
| 659 | memset(ts, 0, sizeof(ts)); |
| 660 | if (skb->tstamp.tv64 && |
| 661 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { |
| 662 | skb_get_timestampns(skb, ts + 0); |
| 663 | empty = 0; |
| 664 | } |
| 665 | if (shhwtstamps) { |
| 666 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && |
| 667 | ktime2ts(shhwtstamps->syststamp, ts + 1)) |
| 668 | empty = 0; |
| 669 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && |
| 670 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) |
| 671 | empty = 0; |
| 672 | } |
| 673 | if (!empty) |
| 674 | put_cmsg(msg, SOL_SOCKET, |
| 675 | SCM_TIMESTAMPING, sizeof(ts), &ts); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 676 | } |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 677 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 678 | |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 679 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
| 680 | struct sk_buff *skb) |
| 681 | { |
| 682 | int ack; |
| 683 | |
| 684 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) |
| 685 | return; |
| 686 | if (!skb->wifi_acked_valid) |
| 687 | return; |
| 688 | |
| 689 | ack = skb->wifi_acked; |
| 690 | |
| 691 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); |
| 692 | } |
| 693 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); |
| 694 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 695 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
| 696 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 697 | { |
| 698 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) |
| 699 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
| 700 | sizeof(__u32), &skb->dropcount); |
| 701 | } |
| 702 | |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 703 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 704 | struct sk_buff *skb) |
| 705 | { |
| 706 | sock_recv_timestamp(msg, sk, skb); |
| 707 | sock_recv_drops(msg, sk, skb); |
| 708 | } |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 709 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 710 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 711 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 712 | struct msghdr *msg, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
| 715 | |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 716 | sock_update_classid(sock->sk); |
| 717 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | si->sock = sock; |
| 719 | si->scm = NULL; |
| 720 | si->msg = msg; |
| 721 | si->size = size; |
| 722 | si->flags = flags; |
| 723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
| 725 | } |
| 726 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 727 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 728 | struct msghdr *msg, size_t size, int flags) |
| 729 | { |
| 730 | int err = security_socket_recvmsg(sock, msg, size, flags); |
| 731 | |
| 732 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); |
| 733 | } |
| 734 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 735 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 736 | size_t size, int flags) |
| 737 | { |
| 738 | struct kiocb iocb; |
| 739 | struct sock_iocb siocb; |
| 740 | int ret; |
| 741 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 742 | init_sync_kiocb(&iocb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | iocb.private = &siocb; |
| 744 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); |
| 745 | if (-EIOCBQUEUED == ret) |
| 746 | ret = wait_on_sync_kiocb(&iocb); |
| 747 | return ret; |
| 748 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 749 | EXPORT_SYMBOL(sock_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 751 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
| 752 | size_t size, int flags) |
| 753 | { |
| 754 | struct kiocb iocb; |
| 755 | struct sock_iocb siocb; |
| 756 | int ret; |
| 757 | |
| 758 | init_sync_kiocb(&iocb, NULL); |
| 759 | iocb.private = &siocb; |
| 760 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); |
| 761 | if (-EIOCBQUEUED == ret) |
| 762 | ret = wait_on_sync_kiocb(&iocb); |
| 763 | return ret; |
| 764 | } |
| 765 | |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 766 | /** |
| 767 | * kernel_recvmsg - Receive a message from a socket (kernel space) |
| 768 | * @sock: The socket to receive the message from |
| 769 | * @msg: Received message |
| 770 | * @vec: Input s/g array for message data |
| 771 | * @num: Size of input s/g array |
| 772 | * @size: Number of bytes to read |
| 773 | * @flags: Message flags (MSG_DONTWAIT, etc...) |
| 774 | * |
| 775 | * On return the msg structure contains the scatter/gather array passed in the |
| 776 | * vec argument. The array is modified so that it consists of the unfilled |
| 777 | * portion of the original array. |
| 778 | * |
| 779 | * The returned value is the total number of bytes received, or an error. |
| 780 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 781 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 782 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | { |
| 784 | mm_segment_t oldfs = get_fs(); |
| 785 | int result; |
| 786 | |
| 787 | set_fs(KERNEL_DS); |
| 788 | /* |
| 789 | * the following is safe, since for compiler definitions of kvec and |
| 790 | * iovec are identical, yielding the same in-core layout and alignment |
| 791 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 792 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | result = sock_recvmsg(sock, msg, size, flags); |
| 794 | set_fs(oldfs); |
| 795 | return result; |
| 796 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 797 | EXPORT_SYMBOL(kernel_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 798 | |
| 799 | static void sock_aio_dtor(struct kiocb *iocb) |
| 800 | { |
| 801 | kfree(iocb->private); |
| 802 | } |
| 803 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 804 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 805 | int offset, size_t size, loff_t *ppos, int more) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | { |
| 807 | struct socket *sock; |
| 808 | int flags; |
| 809 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 810 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | |
| 812 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; |
| 813 | if (more) |
| 814 | flags |= MSG_MORE; |
| 815 | |
Linus Torvalds | e694958 | 2009-08-13 08:28:36 -0700 | [diff] [blame] | 816 | return kernel_sendpage(sock, page, offset, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
| 818 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 819 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 820 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 821 | unsigned int flags) |
| 822 | { |
| 823 | struct socket *sock = file->private_data; |
| 824 | |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 825 | if (unlikely(!sock->ops->splice_read)) |
| 826 | return -EINVAL; |
| 827 | |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 828 | sock_update_classid(sock->sk); |
| 829 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 830 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
| 831 | } |
| 832 | |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 833 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 834 | struct sock_iocb *siocb) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 835 | { |
| 836 | if (!is_sync_kiocb(iocb)) { |
| 837 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); |
| 838 | if (!siocb) |
| 839 | return NULL; |
| 840 | iocb->ki_dtor = sock_aio_dtor; |
| 841 | } |
| 842 | |
| 843 | siocb->kiocb = iocb; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 844 | iocb->private = siocb; |
| 845 | return siocb; |
| 846 | } |
| 847 | |
| 848 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 849 | struct file *file, const struct iovec *iov, |
| 850 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 851 | { |
| 852 | struct socket *sock = file->private_data; |
| 853 | size_t size = 0; |
| 854 | int i; |
| 855 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 856 | for (i = 0; i < nr_segs; i++) |
| 857 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 858 | |
| 859 | msg->msg_name = NULL; |
| 860 | msg->msg_namelen = 0; |
| 861 | msg->msg_control = NULL; |
| 862 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 863 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 864 | msg->msg_iovlen = nr_segs; |
| 865 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 866 | |
| 867 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); |
| 868 | } |
| 869 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 870 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 871 | unsigned long nr_segs, loff_t pos) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 872 | { |
| 873 | struct sock_iocb siocb, *x; |
| 874 | |
| 875 | if (pos != 0) |
| 876 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 877 | |
| 878 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 879 | return 0; |
| 880 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 881 | |
| 882 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 883 | if (!x) |
| 884 | return -ENOMEM; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 885 | 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] | 886 | } |
| 887 | |
| 888 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 889 | struct file *file, const struct iovec *iov, |
| 890 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 891 | { |
| 892 | struct socket *sock = file->private_data; |
| 893 | size_t size = 0; |
| 894 | int i; |
| 895 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 896 | for (i = 0; i < nr_segs; i++) |
| 897 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 898 | |
| 899 | msg->msg_name = NULL; |
| 900 | msg->msg_namelen = 0; |
| 901 | msg->msg_control = NULL; |
| 902 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 903 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 904 | msg->msg_iovlen = nr_segs; |
| 905 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 906 | if (sock->type == SOCK_SEQPACKET) |
| 907 | msg->msg_flags |= MSG_EOR; |
| 908 | |
| 909 | return __sock_sendmsg(iocb, sock, msg, size); |
| 910 | } |
| 911 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 912 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 913 | unsigned long nr_segs, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | { |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 915 | struct sock_iocb siocb, *x; |
| 916 | |
| 917 | if (pos != 0) |
| 918 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 919 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 920 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 921 | if (!x) |
| 922 | return -ENOMEM; |
| 923 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 924 | 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] | 925 | } |
| 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | /* |
| 928 | * Atomic setting of ioctl hooks to avoid race |
| 929 | * with module unload. |
| 930 | */ |
| 931 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 932 | static DEFINE_MUTEX(br_ioctl_mutex); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 933 | 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] | 934 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 935 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 937 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 939 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | } |
| 941 | EXPORT_SYMBOL(brioctl_set); |
| 942 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 943 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 944 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 946 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 948 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 950 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 951 | } |
| 952 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 953 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 954 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 955 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 957 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 959 | mutex_lock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | dlci_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 961 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | } |
| 963 | EXPORT_SYMBOL(dlci_ioctl_set); |
| 964 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 965 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
| 966 | unsigned int cmd, unsigned long arg) |
| 967 | { |
| 968 | int err; |
| 969 | void __user *argp = (void __user *)arg; |
| 970 | |
| 971 | err = sock->ops->ioctl(sock, cmd, arg); |
| 972 | |
| 973 | /* |
| 974 | * If this ioctl is unknown try to hand it down |
| 975 | * to the NIC driver. |
| 976 | */ |
| 977 | if (err == -ENOIOCTLCMD) |
| 978 | err = dev_ioctl(net, cmd, argp); |
| 979 | |
| 980 | return err; |
| 981 | } |
| 982 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | /* |
| 984 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 985 | * what to do with it - that's up to the protocol still. |
| 986 | */ |
| 987 | |
| 988 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 989 | { |
| 990 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 991 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | void __user *argp = (void __user *)arg; |
| 993 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 994 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 996 | sock = file->private_data; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 997 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 998 | net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1000 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1002 | #ifdef CONFIG_WEXT_CORE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1004 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1006 | #endif |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1007 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | case FIOSETOWN: |
| 1009 | case SIOCSPGRP: |
| 1010 | err = -EFAULT; |
| 1011 | if (get_user(pid, (int __user *)argp)) |
| 1012 | break; |
| 1013 | err = f_setown(sock->file, pid, 1); |
| 1014 | break; |
| 1015 | case FIOGETOWN: |
| 1016 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 1017 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1018 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | break; |
| 1020 | case SIOCGIFBR: |
| 1021 | case SIOCSIFBR: |
| 1022 | case SIOCBRADDBR: |
| 1023 | case SIOCBRDELBR: |
| 1024 | err = -ENOPKG; |
| 1025 | if (!br_ioctl_hook) |
| 1026 | request_module("bridge"); |
| 1027 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1028 | mutex_lock(&br_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1029 | if (br_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1030 | err = br_ioctl_hook(net, cmd, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1031 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | break; |
| 1033 | case SIOCGIFVLAN: |
| 1034 | case SIOCSIFVLAN: |
| 1035 | err = -ENOPKG; |
| 1036 | if (!vlan_ioctl_hook) |
| 1037 | request_module("8021q"); |
| 1038 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1039 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1041 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1042 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | case SIOCADDDLCI: |
| 1045 | case SIOCDELDLCI: |
| 1046 | err = -ENOPKG; |
| 1047 | if (!dlci_ioctl_hook) |
| 1048 | request_module("dlci"); |
| 1049 | |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1050 | mutex_lock(&dlci_ioctl_mutex); |
| 1051 | if (dlci_ioctl_hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | err = dlci_ioctl_hook(cmd, argp); |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1053 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | break; |
| 1055 | default: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1056 | err = sock_do_ioctl(net, sock, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1058 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | return err; |
| 1060 | } |
| 1061 | |
| 1062 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 1063 | { |
| 1064 | int err; |
| 1065 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1066 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | err = security_socket_create(family, type, protocol, 1); |
| 1068 | if (err) |
| 1069 | goto out; |
| 1070 | |
| 1071 | sock = sock_alloc(); |
| 1072 | if (!sock) { |
| 1073 | err = -ENOMEM; |
| 1074 | goto out; |
| 1075 | } |
| 1076 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1078 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 1079 | if (err) |
| 1080 | goto out_release; |
| 1081 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | out: |
| 1083 | *res = sock; |
| 1084 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1085 | out_release: |
| 1086 | sock_release(sock); |
| 1087 | sock = NULL; |
| 1088 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1090 | EXPORT_SYMBOL(sock_create_lite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | |
| 1092 | /* No kernel lock held - perfect */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1093 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | { |
| 1095 | struct socket *sock; |
| 1096 | |
| 1097 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1098 | * 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] | 1099 | */ |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1100 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | return sock->ops->poll(file, sock, wait); |
| 1102 | } |
| 1103 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1104 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1106 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | |
| 1108 | return sock->ops->mmap(file, sock, vma); |
| 1109 | } |
| 1110 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1111 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | { |
| 1113 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1114 | * It was possible the inode is NULL we were |
| 1115 | * closing an unfinished socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | */ |
| 1117 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1118 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
| 1120 | return 0; |
| 1121 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | sock_release(SOCKET_I(inode)); |
| 1123 | return 0; |
| 1124 | } |
| 1125 | |
| 1126 | /* |
| 1127 | * Update the socket async list |
| 1128 | * |
| 1129 | * Fasync_list locking strategy. |
| 1130 | * |
| 1131 | * 1. fasync_list is modified only under process context socket lock |
| 1132 | * i.e. under semaphore. |
| 1133 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1134 | * or under socket lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | */ |
| 1136 | |
| 1137 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1138 | { |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1139 | struct socket *sock = filp->private_data; |
| 1140 | struct sock *sk = sock->sk; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1141 | struct socket_wq *wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1143 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | |
| 1146 | lock_sock(sk); |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1147 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
| 1148 | fasync_helper(fd, filp, on, &wq->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1150 | if (!wq->fasync_list) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1151 | sock_reset_flag(sk, SOCK_FASYNC); |
Jonathan Corbet | 7639842 | 2009-02-01 14:26:59 -0700 | [diff] [blame] | 1152 | else |
Eric Dumazet | bcdce71 | 2009-10-06 17:28:29 -0700 | [diff] [blame] | 1153 | sock_set_flag(sk, SOCK_FASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1155 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | return 0; |
| 1157 | } |
| 1158 | |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1159 | /* 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] | 1160 | |
| 1161 | int sock_wake_async(struct socket *sock, int how, int band) |
| 1162 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1163 | struct socket_wq *wq; |
| 1164 | |
| 1165 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | return -1; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1167 | rcu_read_lock(); |
| 1168 | wq = rcu_dereference(sock->wq); |
| 1169 | if (!wq || !wq->fasync_list) { |
| 1170 | rcu_read_unlock(); |
| 1171 | return -1; |
| 1172 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1173 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1174 | case SOCK_WAKE_WAITD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
| 1176 | break; |
| 1177 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1178 | case SOCK_WAKE_SPACE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
| 1180 | break; |
| 1181 | /* fall through */ |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1182 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1183 | call_kill: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1184 | kill_fasync(&wq->fasync_list, SIGIO, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1186 | case SOCK_WAKE_URG: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1187 | kill_fasync(&wq->fasync_list, SIGURG, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | } |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1189 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | return 0; |
| 1191 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1192 | EXPORT_SYMBOL(sock_wake_async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1194 | int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1195 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | { |
| 1197 | int err; |
| 1198 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1199 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
| 1201 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1202 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | */ |
| 1204 | if (family < 0 || family >= NPROTO) |
| 1205 | return -EAFNOSUPPORT; |
| 1206 | if (type < 0 || type >= SOCK_MAX) |
| 1207 | return -EINVAL; |
| 1208 | |
| 1209 | /* Compatibility. |
| 1210 | |
| 1211 | This uglymoron is moved from INET layer to here to avoid |
| 1212 | deadlock in module load. |
| 1213 | */ |
| 1214 | if (family == PF_INET && type == SOCK_PACKET) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1215 | static int warned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | if (!warned) { |
| 1217 | warned = 1; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1218 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1219 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | } |
| 1221 | family = PF_PACKET; |
| 1222 | } |
| 1223 | |
| 1224 | err = security_socket_create(family, type, protocol, kern); |
| 1225 | if (err) |
| 1226 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1227 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1228 | /* |
| 1229 | * Allocate the socket and allow the family to set things up. if |
| 1230 | * the protocol is 0, the family is instructed to select an appropriate |
| 1231 | * default. |
| 1232 | */ |
| 1233 | sock = sock_alloc(); |
| 1234 | if (!sock) { |
| 1235 | if (net_ratelimit()) |
| 1236 | printk(KERN_WARNING "socket: no more sockets\n"); |
| 1237 | return -ENFILE; /* Not exactly a match, but its the |
| 1238 | closest posix thing */ |
| 1239 | } |
| 1240 | |
| 1241 | sock->type = type; |
| 1242 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1243 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1244 | /* Attempt to load a protocol module if the find failed. |
| 1245 | * |
| 1246 | * 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] | 1247 | * requested real, full-featured networking support upon configuration. |
| 1248 | * Otherwise module support will break! |
| 1249 | */ |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 1250 | if (rcu_access_pointer(net_families[family]) == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1251 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | #endif |
| 1253 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1254 | rcu_read_lock(); |
| 1255 | pf = rcu_dereference(net_families[family]); |
| 1256 | err = -EAFNOSUPPORT; |
| 1257 | if (!pf) |
| 1258 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | |
| 1260 | /* |
| 1261 | * We will call the ->create function, that possibly is in a loadable |
| 1262 | * module, so we have to bump that loadable module refcnt first. |
| 1263 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1264 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | goto out_release; |
| 1266 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1267 | /* Now protected by module ref count */ |
| 1268 | rcu_read_unlock(); |
| 1269 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 1270 | err = pf->create(net, sock, protocol, kern); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1271 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | /* |
| 1275 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1276 | * socket at sock_release time we decrement its refcnt. |
| 1277 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1278 | if (!try_module_get(sock->ops->owner)) |
| 1279 | goto out_module_busy; |
| 1280 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | /* |
| 1282 | * Now that we're done with the ->create function, the [loadable] |
| 1283 | * module can have its refcnt decremented |
| 1284 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1285 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1286 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1287 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1288 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1289 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1291 | return 0; |
| 1292 | |
| 1293 | out_module_busy: |
| 1294 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1296 | sock->ops = NULL; |
| 1297 | module_put(pf->owner); |
| 1298 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1300 | return err; |
| 1301 | |
| 1302 | out_release: |
| 1303 | rcu_read_unlock(); |
| 1304 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1305 | } |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1306 | EXPORT_SYMBOL(__sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | |
| 1308 | int sock_create(int family, int type, int protocol, struct socket **res) |
| 1309 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1310 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1311 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1312 | EXPORT_SYMBOL(sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | |
| 1314 | int sock_create_kern(int family, int type, int protocol, struct socket **res) |
| 1315 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1316 | return __sock_create(&init_net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1318 | EXPORT_SYMBOL(sock_create_kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1320 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | { |
| 1322 | int retval; |
| 1323 | struct socket *sock; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1324 | int flags; |
| 1325 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1326 | /* Check the SOCK_* constants for consistency. */ |
| 1327 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1328 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1329 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1330 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1331 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1332 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1333 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1334 | return -EINVAL; |
| 1335 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1337 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1338 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | retval = sock_create(family, type, protocol, &sock); |
| 1341 | if (retval < 0) |
| 1342 | goto out; |
| 1343 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1344 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | if (retval < 0) |
| 1346 | goto out_release; |
| 1347 | |
| 1348 | out: |
| 1349 | /* It may be already another descriptor 8) Not kernel problem. */ |
| 1350 | return retval; |
| 1351 | |
| 1352 | out_release: |
| 1353 | sock_release(sock); |
| 1354 | return retval; |
| 1355 | } |
| 1356 | |
| 1357 | /* |
| 1358 | * Create a pair of connected sockets. |
| 1359 | */ |
| 1360 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1361 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
| 1362 | int __user *, usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | { |
| 1364 | struct socket *sock1, *sock2; |
| 1365 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1366 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1367 | int flags; |
| 1368 | |
| 1369 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1370 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1371 | return -EINVAL; |
| 1372 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1374 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1375 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | /* |
| 1378 | * Obtain the first socket and check if the underlying protocol |
| 1379 | * supports the socketpair call. |
| 1380 | */ |
| 1381 | |
| 1382 | err = sock_create(family, type, protocol, &sock1); |
| 1383 | if (err < 0) |
| 1384 | goto out; |
| 1385 | |
| 1386 | err = sock_create(family, type, protocol, &sock2); |
| 1387 | if (err < 0) |
| 1388 | goto out_release_1; |
| 1389 | |
| 1390 | err = sock1->ops->socketpair(sock1, sock2); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1391 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | goto out_release_both; |
| 1393 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 1394 | fd1 = sock_alloc_file(sock1, &newfile1, flags); |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1395 | if (unlikely(fd1 < 0)) { |
| 1396 | err = fd1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | goto out_release_both; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1398 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 1400 | fd2 = sock_alloc_file(sock2, &newfile2, flags); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1401 | if (unlikely(fd2 < 0)) { |
| 1402 | err = fd2; |
| 1403 | fput(newfile1); |
| 1404 | put_unused_fd(fd1); |
| 1405 | sock_release(sock2); |
| 1406 | goto out; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1407 | } |
| 1408 | |
Al Viro | 157cf64 | 2008-12-14 04:57:47 -0500 | [diff] [blame] | 1409 | audit_fd_pair(fd1, fd2); |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1410 | fd_install(fd1, newfile1); |
| 1411 | fd_install(fd2, newfile2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | /* fd1 and fd2 may be already another descriptors. |
| 1413 | * Not kernel problem. |
| 1414 | */ |
| 1415 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1416 | err = put_user(fd1, &usockvec[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1417 | if (!err) |
| 1418 | err = put_user(fd2, &usockvec[1]); |
| 1419 | if (!err) |
| 1420 | return 0; |
| 1421 | |
| 1422 | sys_close(fd2); |
| 1423 | sys_close(fd1); |
| 1424 | return err; |
| 1425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | out_release_both: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1427 | sock_release(sock2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1428 | out_release_1: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1429 | sock_release(sock1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | out: |
| 1431 | return err; |
| 1432 | } |
| 1433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | /* |
| 1435 | * Bind a name to a socket. Nothing much to do here since it's |
| 1436 | * the protocol's responsibility to handle the local address. |
| 1437 | * |
| 1438 | * We move the socket address to kernel space before we call |
| 1439 | * the protocol layer (having also checked the address is ok). |
| 1440 | */ |
| 1441 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1442 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | { |
| 1444 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1445 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1446 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1448 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1449 | if (sock) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1450 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1451 | if (err >= 0) { |
| 1452 | err = security_socket_bind(sock, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1453 | (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1454 | addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1455 | if (!err) |
| 1456 | err = sock->ops->bind(sock, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1457 | (struct sockaddr *) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1458 | &address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | } |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1460 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1461 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1462 | return err; |
| 1463 | } |
| 1464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | /* |
| 1466 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1467 | * necessary for a listen, and if that works, we mark the socket as |
| 1468 | * ready for listening. |
| 1469 | */ |
| 1470 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1471 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | { |
| 1473 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1474 | int err, fput_needed; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1475 | int somaxconn; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1476 | |
| 1477 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1478 | if (sock) { |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 1479 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1480 | if ((unsigned)backlog > somaxconn) |
| 1481 | backlog = somaxconn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
| 1483 | err = security_socket_listen(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1484 | if (!err) |
| 1485 | err = sock->ops->listen(sock, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1487 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | } |
| 1489 | return err; |
| 1490 | } |
| 1491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | /* |
| 1493 | * For accept, we attempt to create a new socket, set up the link |
| 1494 | * with the client, wake up the client, then return the new |
| 1495 | * connected fd. We collect the address of the connector in kernel |
| 1496 | * space and move it to user at the very end. This is unclean because |
| 1497 | * we open the socket then return an error. |
| 1498 | * |
| 1499 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 1500 | * status to recvmsg. We need to add that support in a way thats |
| 1501 | * clean when we restucture accept also. |
| 1502 | */ |
| 1503 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1504 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1505 | int __user *, upeer_addrlen, int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | { |
| 1507 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1508 | struct file *newfile; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1509 | int err, len, newfd, fput_needed; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1510 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1512 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1513 | return -EINVAL; |
| 1514 | |
| 1515 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1516 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1517 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1518 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | if (!sock) |
| 1520 | goto out; |
| 1521 | |
| 1522 | err = -ENFILE; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1523 | newsock = sock_alloc(); |
| 1524 | if (!newsock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | goto out_put; |
| 1526 | |
| 1527 | newsock->type = sock->type; |
| 1528 | newsock->ops = sock->ops; |
| 1529 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | /* |
| 1531 | * We don't need try_module_get here, as the listening socket (sock) |
| 1532 | * has the protocol module (sock->ops->owner) held. |
| 1533 | */ |
| 1534 | __module_get(newsock->ops->owner); |
| 1535 | |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 1536 | newfd = sock_alloc_file(newsock, &newfile, flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1537 | if (unlikely(newfd < 0)) { |
| 1538 | err = newfd; |
David S. Miller | 9a1875e | 2006-04-01 12:48:36 -0800 | [diff] [blame] | 1539 | sock_release(newsock); |
| 1540 | goto out_put; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1541 | } |
| 1542 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1543 | err = security_socket_accept(sock, newsock); |
| 1544 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1545 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
| 1548 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1549 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | |
| 1551 | if (upeer_sockaddr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1552 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1553 | &len, 2) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1554 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1555 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | } |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1557 | err = move_addr_to_user((struct sockaddr *)&address, |
| 1558 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1560 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | } |
| 1562 | |
| 1563 | /* File flags are not inherited via accept() unlike another OSes. */ |
| 1564 | |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1565 | fd_install(newfd, newfile); |
| 1566 | err = newfd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1568 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1569 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | out: |
| 1571 | return err; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1572 | out_fd: |
David S. Miller | 9606a21 | 2006-04-01 01:00:14 -0800 | [diff] [blame] | 1573 | fput(newfile); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1574 | put_unused_fd(newfd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | goto out_put; |
| 1576 | } |
| 1577 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1578 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1579 | int __user *, upeer_addrlen) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1580 | { |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 1581 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1582 | } |
| 1583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | /* |
| 1585 | * Attempt to connect to a socket with the server address. The address |
| 1586 | * is in user space so we verify it is OK and move it to kernel space. |
| 1587 | * |
| 1588 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 1589 | * break bindings |
| 1590 | * |
| 1591 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 1592 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 1593 | * include the -EINPROGRESS status for such sockets. |
| 1594 | */ |
| 1595 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1596 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
| 1597 | int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1598 | { |
| 1599 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1600 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1601 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1603 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | if (!sock) |
| 1605 | goto out; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1606 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | if (err < 0) |
| 1608 | goto out_put; |
| 1609 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1610 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1611 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | if (err) |
| 1613 | goto out_put; |
| 1614 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1615 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | sock->file->f_flags); |
| 1617 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1618 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | out: |
| 1620 | return err; |
| 1621 | } |
| 1622 | |
| 1623 | /* |
| 1624 | * Get the local address ('name') of a socket object. Move the obtained |
| 1625 | * name to user space. |
| 1626 | */ |
| 1627 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1628 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
| 1629 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | { |
| 1631 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1632 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1633 | int len, err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1634 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1635 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | if (!sock) |
| 1637 | goto out; |
| 1638 | |
| 1639 | err = security_socket_getsockname(sock); |
| 1640 | if (err) |
| 1641 | goto out_put; |
| 1642 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1643 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1644 | if (err) |
| 1645 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1646 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | |
| 1648 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1649 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | out: |
| 1651 | return err; |
| 1652 | } |
| 1653 | |
| 1654 | /* |
| 1655 | * Get the remote address ('name') of a socket object. Move the obtained |
| 1656 | * name to user space. |
| 1657 | */ |
| 1658 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1659 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
| 1660 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | { |
| 1662 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1663 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1664 | int len, err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1666 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1667 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | err = security_socket_getpeername(sock); |
| 1669 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1670 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | return err; |
| 1672 | } |
| 1673 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1674 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1675 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1676 | 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | if (!err) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1678 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1679 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1680 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | } |
| 1682 | return err; |
| 1683 | } |
| 1684 | |
| 1685 | /* |
| 1686 | * Send a datagram to a given address. We move the address into kernel |
| 1687 | * space and check the user space data area is readable before invoking |
| 1688 | * the protocol. |
| 1689 | */ |
| 1690 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1691 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
| 1692 | unsigned, flags, struct sockaddr __user *, addr, |
| 1693 | int, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | { |
| 1695 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1696 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | int err; |
| 1698 | struct msghdr msg; |
| 1699 | struct iovec iov; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1700 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1701 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1702 | if (len > INT_MAX) |
| 1703 | len = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1704 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1705 | if (!sock) |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1706 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1707 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1708 | iov.iov_base = buff; |
| 1709 | iov.iov_len = len; |
| 1710 | msg.msg_name = NULL; |
| 1711 | msg.msg_iov = &iov; |
| 1712 | msg.msg_iovlen = 1; |
| 1713 | msg.msg_control = NULL; |
| 1714 | msg.msg_controllen = 0; |
| 1715 | msg.msg_namelen = 0; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1716 | if (addr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1717 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | if (err < 0) |
| 1719 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1720 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1721 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | } |
| 1723 | if (sock->file->f_flags & O_NONBLOCK) |
| 1724 | flags |= MSG_DONTWAIT; |
| 1725 | msg.msg_flags = flags; |
| 1726 | err = sock_sendmsg(sock, &msg, len); |
| 1727 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1728 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1729 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1730 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1731 | return err; |
| 1732 | } |
| 1733 | |
| 1734 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1735 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | */ |
| 1737 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1738 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
| 1739 | unsigned, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | { |
| 1741 | return sys_sendto(fd, buff, len, flags, NULL, 0); |
| 1742 | } |
| 1743 | |
| 1744 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1745 | * 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] | 1746 | * sender. We verify the buffers are writable and if needed move the |
| 1747 | * sender address from kernel to user space. |
| 1748 | */ |
| 1749 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1750 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
| 1751 | unsigned, flags, struct sockaddr __user *, addr, |
| 1752 | int __user *, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | { |
| 1754 | struct socket *sock; |
| 1755 | struct iovec iov; |
| 1756 | struct msghdr msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1757 | struct sockaddr_storage address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1758 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1759 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1761 | if (size > INT_MAX) |
| 1762 | size = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1763 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | if (!sock) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1765 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1767 | msg.msg_control = NULL; |
| 1768 | msg.msg_controllen = 0; |
| 1769 | msg.msg_iovlen = 1; |
| 1770 | msg.msg_iov = &iov; |
| 1771 | iov.iov_len = size; |
| 1772 | iov.iov_base = ubuf; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1773 | msg.msg_name = (struct sockaddr *)&address; |
| 1774 | msg.msg_namelen = sizeof(address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | if (sock->file->f_flags & O_NONBLOCK) |
| 1776 | flags |= MSG_DONTWAIT; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1777 | err = sock_recvmsg(sock, &msg, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1779 | if (err >= 0 && addr != NULL) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1780 | err2 = move_addr_to_user((struct sockaddr *)&address, |
| 1781 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1782 | if (err2 < 0) |
| 1783 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1785 | |
| 1786 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1787 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | return err; |
| 1789 | } |
| 1790 | |
| 1791 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1792 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | */ |
| 1794 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1795 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
| 1796 | unsigned flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1797 | { |
| 1798 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
| 1799 | } |
| 1800 | |
| 1801 | /* |
| 1802 | * Set a socket option. Because we don't know the option lengths we have |
| 1803 | * to pass the user mode parameter for the protocols to sort out. |
| 1804 | */ |
| 1805 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1806 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| 1807 | char __user *, optval, int, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1809 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | struct socket *sock; |
| 1811 | |
| 1812 | if (optlen < 0) |
| 1813 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1814 | |
| 1815 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1816 | if (sock != NULL) { |
| 1817 | err = security_socket_setsockopt(sock, level, optname); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1818 | if (err) |
| 1819 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1820 | |
| 1821 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1822 | err = |
| 1823 | sock_setsockopt(sock, level, optname, optval, |
| 1824 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1825 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1826 | err = |
| 1827 | sock->ops->setsockopt(sock, level, optname, optval, |
| 1828 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1829 | out_put: |
| 1830 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | } |
| 1832 | return err; |
| 1833 | } |
| 1834 | |
| 1835 | /* |
| 1836 | * Get a socket option. Because we don't know the option lengths we have |
| 1837 | * to pass a user mode parameter for the protocols to sort out. |
| 1838 | */ |
| 1839 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1840 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| 1841 | char __user *, optval, int __user *, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1843 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1844 | struct socket *sock; |
| 1845 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1846 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1847 | if (sock != NULL) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1848 | err = security_socket_getsockopt(sock, level, optname); |
| 1849 | if (err) |
| 1850 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | |
| 1852 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1853 | err = |
| 1854 | sock_getsockopt(sock, level, optname, optval, |
| 1855 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1857 | err = |
| 1858 | sock->ops->getsockopt(sock, level, optname, optval, |
| 1859 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1860 | out_put: |
| 1861 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | } |
| 1863 | return err; |
| 1864 | } |
| 1865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | /* |
| 1867 | * Shutdown a socket. |
| 1868 | */ |
| 1869 | |
Heiko Carstens | 754fe8d | 2009-01-14 14:14:09 +0100 | [diff] [blame] | 1870 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1871 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1872 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1873 | struct socket *sock; |
| 1874 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1875 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1876 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | err = security_socket_shutdown(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1878 | if (!err) |
| 1879 | err = sock->ops->shutdown(sock, how); |
| 1880 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | } |
| 1882 | return err; |
| 1883 | } |
| 1884 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1885 | /* 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] | 1886 | * fields which are the same type (int / unsigned) on our platforms. |
| 1887 | */ |
| 1888 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 1889 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 1890 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 1891 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1892 | struct used_address { |
| 1893 | struct sockaddr_storage name; |
| 1894 | unsigned int name_len; |
| 1895 | }; |
| 1896 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1897 | static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1898 | struct msghdr *msg_sys, unsigned flags, |
| 1899 | struct used_address *used_address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1901 | struct compat_msghdr __user *msg_compat = |
| 1902 | (struct compat_msghdr __user *)msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1903 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 1905 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1906 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
| 1907 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | unsigned char *ctl_buf = ctl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | int err, ctl_len, iov_size, total_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | err = -EFAULT; |
| 1912 | if (MSG_CMSG_COMPAT & flags) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1913 | if (get_compat_msghdr(msg_sys, msg_compat)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | return -EFAULT; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1915 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1916 | return -EFAULT; |
| 1917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | /* do not move before msg_sys is valid */ |
| 1919 | err = -EMSGSIZE; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1920 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
| 1921 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1923 | /* Check whether to allocate the iovec area */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | err = -ENOMEM; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1925 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
| 1926 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
| 1928 | if (!iov) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1929 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | } |
| 1931 | |
| 1932 | /* This will also move the address data into kernel space */ |
| 1933 | if (MSG_CMSG_COMPAT & flags) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1934 | err = verify_compat_iovec(msg_sys, iov, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1935 | (struct sockaddr *)&address, |
| 1936 | VERIFY_READ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1937 | } else |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1938 | err = verify_iovec(msg_sys, iov, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1939 | (struct sockaddr *)&address, |
| 1940 | VERIFY_READ); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1941 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | goto out_freeiov; |
| 1943 | total_len = err; |
| 1944 | |
| 1945 | err = -ENOBUFS; |
| 1946 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1947 | if (msg_sys->msg_controllen > INT_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1949 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1951 | err = |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1952 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1953 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | if (err) |
| 1955 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1956 | ctl_buf = msg_sys->msg_control; |
| 1957 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | } else if (ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1959 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1961 | if (ctl_buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | goto out_freeiov; |
| 1963 | } |
| 1964 | err = -EFAULT; |
| 1965 | /* |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1966 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
| 1968 | * checking falls down on this. |
| 1969 | */ |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 1970 | if (copy_from_user(ctl_buf, |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1971 | (void __user __force *)msg_sys->msg_control, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1972 | ctl_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | goto out_freectl; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1974 | msg_sys->msg_control = ctl_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | } |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1976 | msg_sys->msg_flags = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | |
| 1978 | if (sock->file->f_flags & O_NONBLOCK) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1979 | msg_sys->msg_flags |= MSG_DONTWAIT; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1980 | /* |
| 1981 | * If this is sendmmsg() and current destination address is same as |
| 1982 | * previously succeeded address, omit asking LSM's decision. |
| 1983 | * used_address->name_len is initialized to UINT_MAX so that the first |
| 1984 | * destination address never matches. |
| 1985 | */ |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 1986 | if (used_address && msg_sys->msg_name && |
| 1987 | used_address->name_len == msg_sys->msg_namelen && |
| 1988 | !memcmp(&used_address->name, msg_sys->msg_name, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1989 | used_address->name_len)) { |
| 1990 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); |
| 1991 | goto out_freectl; |
| 1992 | } |
| 1993 | err = sock_sendmsg(sock, msg_sys, total_len); |
| 1994 | /* |
| 1995 | * If this is sendmmsg() and sending to current destination address was |
| 1996 | * successful, remember it. |
| 1997 | */ |
| 1998 | if (used_address && err >= 0) { |
| 1999 | used_address->name_len = msg_sys->msg_namelen; |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2000 | if (msg_sys->msg_name) |
| 2001 | memcpy(&used_address->name, msg_sys->msg_name, |
| 2002 | used_address->name_len); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2003 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | |
| 2005 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2006 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
| 2008 | out_freeiov: |
| 2009 | if (iov != iovstack) |
| 2010 | sock_kfree_s(sock->sk, iov, iov_size); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2011 | out: |
| 2012 | return err; |
| 2013 | } |
| 2014 | |
| 2015 | /* |
| 2016 | * BSD sendmsg interface |
| 2017 | */ |
| 2018 | |
| 2019 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
| 2020 | { |
| 2021 | int fput_needed, err; |
| 2022 | struct msghdr msg_sys; |
| 2023 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2024 | |
| 2025 | if (!sock) |
| 2026 | goto out; |
| 2027 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2028 | err = __sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2029 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2030 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2031 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | return err; |
| 2033 | } |
| 2034 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2035 | /* |
| 2036 | * Linux sendmmsg interface |
| 2037 | */ |
| 2038 | |
| 2039 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2040 | unsigned int flags) |
| 2041 | { |
| 2042 | int fput_needed, err, datagrams; |
| 2043 | struct socket *sock; |
| 2044 | struct mmsghdr __user *entry; |
| 2045 | struct compat_mmsghdr __user *compat_entry; |
| 2046 | struct msghdr msg_sys; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2047 | struct used_address used_address; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2048 | |
Anton Blanchard | 98382f4 | 2011-08-04 14:07:39 +0000 | [diff] [blame] | 2049 | if (vlen > UIO_MAXIOV) |
| 2050 | vlen = UIO_MAXIOV; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2051 | |
| 2052 | datagrams = 0; |
| 2053 | |
| 2054 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2055 | if (!sock) |
| 2056 | return err; |
| 2057 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2058 | used_address.name_len = UINT_MAX; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2059 | entry = mmsg; |
| 2060 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2061 | err = 0; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2062 | |
| 2063 | while (datagrams < vlen) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2064 | if (MSG_CMSG_COMPAT & flags) { |
| 2065 | err = __sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2066 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2067 | if (err < 0) |
| 2068 | break; |
| 2069 | err = __put_user(err, &compat_entry->msg_len); |
| 2070 | ++compat_entry; |
| 2071 | } else { |
| 2072 | err = __sys_sendmsg(sock, (struct msghdr __user *)entry, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2073 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2074 | if (err < 0) |
| 2075 | break; |
| 2076 | err = put_user(err, &entry->msg_len); |
| 2077 | ++entry; |
| 2078 | } |
| 2079 | |
| 2080 | if (err) |
| 2081 | break; |
| 2082 | ++datagrams; |
| 2083 | } |
| 2084 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2085 | fput_light(sock->file, fput_needed); |
| 2086 | |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2087 | /* We only return an error if no datagrams were able to be sent */ |
| 2088 | if (datagrams != 0) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2089 | return datagrams; |
| 2090 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2091 | return err; |
| 2092 | } |
| 2093 | |
| 2094 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2095 | unsigned int, vlen, unsigned int, flags) |
| 2096 | { |
| 2097 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
| 2098 | } |
| 2099 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2100 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
| 2101 | struct msghdr *msg_sys, unsigned flags, int nosec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2103 | struct compat_msghdr __user *msg_compat = |
| 2104 | (struct compat_msghdr __user *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | struct iovec iovstack[UIO_FASTIOV]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2106 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2107 | unsigned long cmsg_ptr; |
| 2108 | int err, iov_size, total_len, len; |
| 2109 | |
| 2110 | /* kernel mode address */ |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2111 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | |
| 2113 | /* user mode address pointers */ |
| 2114 | struct sockaddr __user *uaddr; |
| 2115 | int __user *uaddr_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2117 | if (MSG_CMSG_COMPAT & flags) { |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2118 | if (get_compat_msghdr(msg_sys, msg_compat)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | return -EFAULT; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2120 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2121 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2123 | err = -EMSGSIZE; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2124 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
| 2125 | goto out; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2126 | |
| 2127 | /* Check whether to allocate the iovec area */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2128 | err = -ENOMEM; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2129 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
| 2130 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2131 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
| 2132 | if (!iov) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2133 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2134 | } |
| 2135 | |
| 2136 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2137 | * Save the user-mode address (verify_iovec will change the |
| 2138 | * kernel msghdr to use the kernel address space) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2140 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2141 | uaddr = (__force void __user *)msg_sys->msg_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | uaddr_len = COMPAT_NAMELEN(msg); |
| 2143 | if (MSG_CMSG_COMPAT & flags) { |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2144 | err = verify_compat_iovec(msg_sys, iov, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2145 | (struct sockaddr *)&addr, |
| 2146 | VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2147 | } else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2148 | err = verify_iovec(msg_sys, iov, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2149 | (struct sockaddr *)&addr, |
| 2150 | VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | if (err < 0) |
| 2152 | goto out_freeiov; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2153 | total_len = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2155 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
| 2156 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | if (sock->file->f_flags & O_NONBLOCK) |
| 2159 | flags |= MSG_DONTWAIT; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2160 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
| 2161 | total_len, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2162 | if (err < 0) |
| 2163 | goto out_freeiov; |
| 2164 | len = err; |
| 2165 | |
| 2166 | if (uaddr != NULL) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2167 | err = move_addr_to_user((struct sockaddr *)&addr, |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2168 | msg_sys->msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2169 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2170 | if (err < 0) |
| 2171 | goto out_freeiov; |
| 2172 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2173 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2174 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | if (err) |
| 2176 | goto out_freeiov; |
| 2177 | if (MSG_CMSG_COMPAT & flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2178 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2179 | &msg_compat->msg_controllen); |
| 2180 | else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2181 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | &msg->msg_controllen); |
| 2183 | if (err) |
| 2184 | goto out_freeiov; |
| 2185 | err = len; |
| 2186 | |
| 2187 | out_freeiov: |
| 2188 | if (iov != iovstack) |
| 2189 | sock_kfree_s(sock->sk, iov, iov_size); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2190 | out: |
| 2191 | return err; |
| 2192 | } |
| 2193 | |
| 2194 | /* |
| 2195 | * BSD recvmsg interface |
| 2196 | */ |
| 2197 | |
| 2198 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
| 2199 | unsigned int, flags) |
| 2200 | { |
| 2201 | int fput_needed, err; |
| 2202 | struct msghdr msg_sys; |
| 2203 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2204 | |
| 2205 | if (!sock) |
| 2206 | goto out; |
| 2207 | |
| 2208 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
| 2209 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2210 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2211 | out: |
| 2212 | return err; |
| 2213 | } |
| 2214 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2215 | /* |
| 2216 | * Linux recvmmsg interface |
| 2217 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2219 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2220 | unsigned int flags, struct timespec *timeout) |
| 2221 | { |
| 2222 | int fput_needed, err, datagrams; |
| 2223 | struct socket *sock; |
| 2224 | struct mmsghdr __user *entry; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2225 | struct compat_mmsghdr __user *compat_entry; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2226 | struct msghdr msg_sys; |
| 2227 | struct timespec end_time; |
| 2228 | |
| 2229 | if (timeout && |
| 2230 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
| 2231 | timeout->tv_nsec)) |
| 2232 | return -EINVAL; |
| 2233 | |
| 2234 | datagrams = 0; |
| 2235 | |
| 2236 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2237 | if (!sock) |
| 2238 | return err; |
| 2239 | |
| 2240 | err = sock_error(sock->sk); |
| 2241 | if (err) |
| 2242 | goto out_put; |
| 2243 | |
| 2244 | entry = mmsg; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2245 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2246 | |
| 2247 | while (datagrams < vlen) { |
| 2248 | /* |
| 2249 | * No need to ask LSM for more than the first datagram. |
| 2250 | */ |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2251 | if (MSG_CMSG_COMPAT & flags) { |
| 2252 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
Anton Blanchard | b9eb8b8 | 2011-05-17 15:38:57 -0400 | [diff] [blame] | 2253 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2254 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2255 | if (err < 0) |
| 2256 | break; |
| 2257 | err = __put_user(err, &compat_entry->msg_len); |
| 2258 | ++compat_entry; |
| 2259 | } else { |
| 2260 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, |
Anton Blanchard | b9eb8b8 | 2011-05-17 15:38:57 -0400 | [diff] [blame] | 2261 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2262 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2263 | if (err < 0) |
| 2264 | break; |
| 2265 | err = put_user(err, &entry->msg_len); |
| 2266 | ++entry; |
| 2267 | } |
| 2268 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2269 | if (err) |
| 2270 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2271 | ++datagrams; |
| 2272 | |
Brandon L Black | 71c5c15 | 2010-03-26 16:18:03 +0000 | [diff] [blame] | 2273 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
| 2274 | if (flags & MSG_WAITFORONE) |
| 2275 | flags |= MSG_DONTWAIT; |
| 2276 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2277 | if (timeout) { |
| 2278 | ktime_get_ts(timeout); |
| 2279 | *timeout = timespec_sub(end_time, *timeout); |
| 2280 | if (timeout->tv_sec < 0) { |
| 2281 | timeout->tv_sec = timeout->tv_nsec = 0; |
| 2282 | break; |
| 2283 | } |
| 2284 | |
| 2285 | /* Timeout, return less than vlen datagrams */ |
| 2286 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
| 2287 | break; |
| 2288 | } |
| 2289 | |
| 2290 | /* Out of band data, return right away */ |
| 2291 | if (msg_sys.msg_flags & MSG_OOB) |
| 2292 | break; |
| 2293 | } |
| 2294 | |
| 2295 | out_put: |
| 2296 | fput_light(sock->file, fput_needed); |
| 2297 | |
| 2298 | if (err == 0) |
| 2299 | return datagrams; |
| 2300 | |
| 2301 | if (datagrams != 0) { |
| 2302 | /* |
| 2303 | * We may return less entries than requested (vlen) if the |
| 2304 | * sock is non block and there aren't enough datagrams... |
| 2305 | */ |
| 2306 | if (err != -EAGAIN) { |
| 2307 | /* |
| 2308 | * ... or if recvmsg returns an error after we |
| 2309 | * received some datagrams, where we record the |
| 2310 | * error to return on the next call or if the |
| 2311 | * app asks about it using getsockopt(SO_ERROR). |
| 2312 | */ |
| 2313 | sock->sk->sk_err = -err; |
| 2314 | } |
| 2315 | |
| 2316 | return datagrams; |
| 2317 | } |
| 2318 | |
| 2319 | return err; |
| 2320 | } |
| 2321 | |
| 2322 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2323 | unsigned int, vlen, unsigned int, flags, |
| 2324 | struct timespec __user *, timeout) |
| 2325 | { |
| 2326 | int datagrams; |
| 2327 | struct timespec timeout_sys; |
| 2328 | |
| 2329 | if (!timeout) |
| 2330 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); |
| 2331 | |
| 2332 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) |
| 2333 | return -EFAULT; |
| 2334 | |
| 2335 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
| 2336 | |
| 2337 | if (datagrams > 0 && |
| 2338 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) |
| 2339 | datagrams = -EFAULT; |
| 2340 | |
| 2341 | return datagrams; |
| 2342 | } |
| 2343 | |
| 2344 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2345 | /* Argument list sizes for sys_socketcall */ |
| 2346 | #define AL(x) ((x) * sizeof(unsigned long)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2347 | static const unsigned char nargs[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2348 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 2349 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 2350 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2351 | AL(4), AL(5), AL(4) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2352 | }; |
| 2353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2354 | #undef AL |
| 2355 | |
| 2356 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2357 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | * |
| 2359 | * Argument checking cleaned up. Saved 20% in size. |
| 2360 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2361 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2362 | */ |
| 2363 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 2364 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2365 | { |
| 2366 | unsigned long a[6]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2367 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2368 | int err; |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2369 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2370 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2371 | if (call < 1 || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2372 | return -EINVAL; |
| 2373 | |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2374 | len = nargs[call]; |
| 2375 | if (len > sizeof(a)) |
| 2376 | return -EINVAL; |
| 2377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2378 | /* copy_from_user should be SMP safe. */ |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2379 | if (copy_from_user(a, args, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2381 | |
Al Viro | f3298dc | 2008-12-10 03:16:51 -0500 | [diff] [blame] | 2382 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2383 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2384 | a0 = a[0]; |
| 2385 | a1 = a[1]; |
| 2386 | |
| 2387 | switch (call) { |
| 2388 | case SYS_SOCKET: |
| 2389 | err = sys_socket(a0, a1, a[2]); |
| 2390 | break; |
| 2391 | case SYS_BIND: |
| 2392 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
| 2393 | break; |
| 2394 | case SYS_CONNECT: |
| 2395 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
| 2396 | break; |
| 2397 | case SYS_LISTEN: |
| 2398 | err = sys_listen(a0, a1); |
| 2399 | break; |
| 2400 | case SYS_ACCEPT: |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2401 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2402 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2403 | break; |
| 2404 | case SYS_GETSOCKNAME: |
| 2405 | err = |
| 2406 | sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 2407 | (int __user *)a[2]); |
| 2408 | break; |
| 2409 | case SYS_GETPEERNAME: |
| 2410 | err = |
| 2411 | sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 2412 | (int __user *)a[2]); |
| 2413 | break; |
| 2414 | case SYS_SOCKETPAIR: |
| 2415 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
| 2416 | break; |
| 2417 | case SYS_SEND: |
| 2418 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); |
| 2419 | break; |
| 2420 | case SYS_SENDTO: |
| 2421 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 2422 | (struct sockaddr __user *)a[4], a[5]); |
| 2423 | break; |
| 2424 | case SYS_RECV: |
| 2425 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); |
| 2426 | break; |
| 2427 | case SYS_RECVFROM: |
| 2428 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 2429 | (struct sockaddr __user *)a[4], |
| 2430 | (int __user *)a[5]); |
| 2431 | break; |
| 2432 | case SYS_SHUTDOWN: |
| 2433 | err = sys_shutdown(a0, a1); |
| 2434 | break; |
| 2435 | case SYS_SETSOCKOPT: |
| 2436 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
| 2437 | break; |
| 2438 | case SYS_GETSOCKOPT: |
| 2439 | err = |
| 2440 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 2441 | (int __user *)a[4]); |
| 2442 | break; |
| 2443 | case SYS_SENDMSG: |
| 2444 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2445 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2446 | case SYS_SENDMMSG: |
| 2447 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); |
| 2448 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2449 | case SYS_RECVMSG: |
| 2450 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2451 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2452 | case SYS_RECVMMSG: |
| 2453 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], |
| 2454 | (struct timespec __user *)a[4]); |
| 2455 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2456 | case SYS_ACCEPT4: |
| 2457 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2458 | (int __user *)a[2], a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2459 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2460 | default: |
| 2461 | err = -EINVAL; |
| 2462 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2463 | } |
| 2464 | return err; |
| 2465 | } |
| 2466 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2467 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2469 | /** |
| 2470 | * sock_register - add a socket protocol handler |
| 2471 | * @ops: description of protocol |
| 2472 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | * This function is called by a protocol handler that wants to |
| 2474 | * advertise its address family, and have it linked into the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2475 | * socket interface. The value ops->family coresponds to the |
| 2476 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2477 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2478 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | { |
| 2480 | int err; |
| 2481 | |
| 2482 | if (ops->family >= NPROTO) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2483 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
| 2484 | NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | return -ENOBUFS; |
| 2486 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2487 | |
| 2488 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 2489 | if (rcu_dereference_protected(net_families[ops->family], |
| 2490 | lockdep_is_held(&net_family_lock))) |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2491 | err = -EEXIST; |
| 2492 | else { |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 2493 | RCU_INIT_POINTER(net_families[ops->family], ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | err = 0; |
| 2495 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2496 | spin_unlock(&net_family_lock); |
| 2497 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2498 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | return err; |
| 2500 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2501 | EXPORT_SYMBOL(sock_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2502 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2503 | /** |
| 2504 | * sock_unregister - remove a protocol handler |
| 2505 | * @family: protocol family to remove |
| 2506 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2507 | * This function is called by a protocol handler that wants to |
| 2508 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2509 | * new socket creation. |
| 2510 | * |
| 2511 | * If protocol handler is a module, then it can use module reference |
| 2512 | * counts to protect against new references. If protocol handler is not |
| 2513 | * a module then it needs to provide its own protection in |
| 2514 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2516 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2517 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2518 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2519 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2520 | spin_lock(&net_family_lock); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 2521 | RCU_INIT_POINTER(net_families[family], NULL); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2522 | spin_unlock(&net_family_lock); |
| 2523 | |
| 2524 | synchronize_rcu(); |
| 2525 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2526 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2528 | EXPORT_SYMBOL(sock_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2530 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2531 | { |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2532 | int err; |
| 2533 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2534 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2535 | * Initialize sock SLAB cache. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2536 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | sk_init(); |
| 2539 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2540 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2541 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | */ |
| 2543 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | |
| 2545 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2546 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2547 | */ |
| 2548 | |
| 2549 | init_inodecache(); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2550 | |
| 2551 | err = register_filesystem(&sock_fs_type); |
| 2552 | if (err) |
| 2553 | goto out_fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | sock_mnt = kern_mount(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2555 | if (IS_ERR(sock_mnt)) { |
| 2556 | err = PTR_ERR(sock_mnt); |
| 2557 | goto out_mount; |
| 2558 | } |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2559 | |
| 2560 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2561 | */ |
| 2562 | |
| 2563 | #ifdef CONFIG_NETFILTER |
| 2564 | netfilter_init(); |
| 2565 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 2566 | |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 2567 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
| 2568 | skb_timestamping_init(); |
| 2569 | #endif |
| 2570 | |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2571 | out: |
| 2572 | return err; |
| 2573 | |
| 2574 | out_mount: |
| 2575 | unregister_filesystem(&sock_fs_type); |
| 2576 | out_fs: |
| 2577 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | } |
| 2579 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2580 | core_initcall(sock_init); /* early initcall */ |
| 2581 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2582 | #ifdef CONFIG_PROC_FS |
| 2583 | void socket_seq_show(struct seq_file *seq) |
| 2584 | { |
| 2585 | int cpu; |
| 2586 | int counter = 0; |
| 2587 | |
KAMEZAWA Hiroyuki | 6f91204 | 2006-04-10 22:52:50 -0700 | [diff] [blame] | 2588 | for_each_possible_cpu(cpu) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2589 | counter += per_cpu(sockets_in_use, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2590 | |
| 2591 | /* It can be negative, by the way. 8) */ |
| 2592 | if (counter < 0) |
| 2593 | counter = 0; |
| 2594 | |
| 2595 | seq_printf(seq, "sockets: used %d\n", counter); |
| 2596 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2597 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2598 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2599 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2600 | static int do_siocgstamp(struct net *net, struct socket *sock, |
| 2601 | unsigned int cmd, struct compat_timeval __user *up) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2602 | { |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2603 | mm_segment_t old_fs = get_fs(); |
| 2604 | struct timeval ktv; |
| 2605 | int err; |
| 2606 | |
| 2607 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2608 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2609 | set_fs(old_fs); |
| 2610 | if (!err) { |
| 2611 | err = put_user(ktv.tv_sec, &up->tv_sec); |
| 2612 | err |= __put_user(ktv.tv_usec, &up->tv_usec); |
| 2613 | } |
| 2614 | return err; |
| 2615 | } |
| 2616 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2617 | static int do_siocgstampns(struct net *net, struct socket *sock, |
| 2618 | unsigned int cmd, struct compat_timespec __user *up) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2619 | { |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2620 | mm_segment_t old_fs = get_fs(); |
| 2621 | struct timespec kts; |
| 2622 | int err; |
| 2623 | |
| 2624 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2625 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2626 | set_fs(old_fs); |
| 2627 | if (!err) { |
| 2628 | err = put_user(kts.tv_sec, &up->tv_sec); |
| 2629 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); |
| 2630 | } |
| 2631 | return err; |
| 2632 | } |
| 2633 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2634 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2635 | { |
| 2636 | struct ifreq __user *uifr; |
| 2637 | int err; |
| 2638 | |
| 2639 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2640 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2641 | return -EFAULT; |
| 2642 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2643 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2644 | if (err) |
| 2645 | return err; |
| 2646 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2647 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2648 | return -EFAULT; |
| 2649 | |
| 2650 | return 0; |
| 2651 | } |
| 2652 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2653 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2654 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2655 | struct compat_ifconf ifc32; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2656 | struct ifconf ifc; |
| 2657 | struct ifconf __user *uifc; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2658 | struct compat_ifreq __user *ifr32; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2659 | struct ifreq __user *ifr; |
| 2660 | unsigned int i, j; |
| 2661 | int err; |
| 2662 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2663 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2664 | return -EFAULT; |
| 2665 | |
| 2666 | if (ifc32.ifcbuf == 0) { |
| 2667 | ifc32.ifc_len = 0; |
| 2668 | ifc.ifc_len = 0; |
| 2669 | ifc.ifc_req = NULL; |
| 2670 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); |
| 2671 | } else { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2672 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
| 2673 | sizeof(struct ifreq); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2674 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
| 2675 | ifc.ifc_len = len; |
| 2676 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); |
| 2677 | ifr32 = compat_ptr(ifc32.ifcbuf); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2678 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2679 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2680 | return -EFAULT; |
| 2681 | ifr++; |
| 2682 | ifr32++; |
| 2683 | } |
| 2684 | } |
| 2685 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) |
| 2686 | return -EFAULT; |
| 2687 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2688 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2689 | if (err) |
| 2690 | return err; |
| 2691 | |
| 2692 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) |
| 2693 | return -EFAULT; |
| 2694 | |
| 2695 | ifr = ifc.ifc_req; |
| 2696 | ifr32 = compat_ptr(ifc32.ifcbuf); |
| 2697 | for (i = 0, j = 0; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2698 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
| 2699 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { |
| 2700 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2701 | return -EFAULT; |
| 2702 | ifr32++; |
| 2703 | ifr++; |
| 2704 | } |
| 2705 | |
| 2706 | if (ifc32.ifcbuf == 0) { |
| 2707 | /* Translate from 64-bit structure multiple to |
| 2708 | * a 32-bit one. |
| 2709 | */ |
| 2710 | i = ifc.ifc_len; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2711 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2712 | ifc32.ifc_len = i; |
| 2713 | } else { |
| 2714 | ifc32.ifc_len = i; |
| 2715 | } |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2716 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2717 | return -EFAULT; |
| 2718 | |
| 2719 | return 0; |
| 2720 | } |
| 2721 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2722 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2723 | { |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2724 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
| 2725 | bool convert_in = false, convert_out = false; |
| 2726 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); |
| 2727 | struct ethtool_rxnfc __user *rxnfc; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2728 | struct ifreq __user *ifr; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2729 | u32 rule_cnt = 0, actual_rule_cnt; |
| 2730 | u32 ethcmd; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2731 | u32 data; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2732 | int ret; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2733 | |
| 2734 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2735 | return -EFAULT; |
| 2736 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2737 | compat_rxnfc = compat_ptr(data); |
| 2738 | |
| 2739 | if (get_user(ethcmd, &compat_rxnfc->cmd)) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2740 | return -EFAULT; |
| 2741 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2742 | /* Most ethtool structures are defined without padding. |
| 2743 | * Unfortunately struct ethtool_rxnfc is an exception. |
| 2744 | */ |
| 2745 | switch (ethcmd) { |
| 2746 | default: |
| 2747 | break; |
| 2748 | case ETHTOOL_GRXCLSRLALL: |
| 2749 | /* Buffer size is variable */ |
| 2750 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) |
| 2751 | return -EFAULT; |
| 2752 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) |
| 2753 | return -ENOMEM; |
| 2754 | buf_size += rule_cnt * sizeof(u32); |
| 2755 | /* fall through */ |
| 2756 | case ETHTOOL_GRXRINGS: |
| 2757 | case ETHTOOL_GRXCLSRLCNT: |
| 2758 | case ETHTOOL_GRXCLSRULE: |
| 2759 | convert_out = true; |
| 2760 | /* fall through */ |
| 2761 | case ETHTOOL_SRXCLSRLDEL: |
| 2762 | case ETHTOOL_SRXCLSRLINS: |
| 2763 | buf_size += sizeof(struct ethtool_rxnfc); |
| 2764 | convert_in = true; |
| 2765 | break; |
| 2766 | } |
| 2767 | |
| 2768 | ifr = compat_alloc_user_space(buf_size); |
| 2769 | rxnfc = (void *)ifr + ALIGN(sizeof(struct ifreq), 8); |
| 2770 | |
| 2771 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2772 | return -EFAULT; |
| 2773 | |
| 2774 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
| 2775 | &ifr->ifr_ifru.ifru_data)) |
| 2776 | return -EFAULT; |
| 2777 | |
| 2778 | if (convert_in) { |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2779 | /* We expect there to be holes between fs.m_ext and |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2780 | * fs.ring_cookie and at the end of fs, but nowhere else. |
| 2781 | */ |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2782 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
| 2783 | sizeof(compat_rxnfc->fs.m_ext) != |
| 2784 | offsetof(struct ethtool_rxnfc, fs.m_ext) + |
| 2785 | sizeof(rxnfc->fs.m_ext)); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2786 | BUILD_BUG_ON( |
| 2787 | offsetof(struct compat_ethtool_rxnfc, fs.location) - |
| 2788 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != |
| 2789 | offsetof(struct ethtool_rxnfc, fs.location) - |
| 2790 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); |
| 2791 | |
| 2792 | if (copy_in_user(rxnfc, compat_rxnfc, |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2793 | (void *)(&rxnfc->fs.m_ext + 1) - |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2794 | (void *)rxnfc) || |
| 2795 | copy_in_user(&rxnfc->fs.ring_cookie, |
| 2796 | &compat_rxnfc->fs.ring_cookie, |
| 2797 | (void *)(&rxnfc->fs.location + 1) - |
| 2798 | (void *)&rxnfc->fs.ring_cookie) || |
| 2799 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
| 2800 | sizeof(rxnfc->rule_cnt))) |
| 2801 | return -EFAULT; |
| 2802 | } |
| 2803 | |
| 2804 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); |
| 2805 | if (ret) |
| 2806 | return ret; |
| 2807 | |
| 2808 | if (convert_out) { |
| 2809 | if (copy_in_user(compat_rxnfc, rxnfc, |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2810 | (const void *)(&rxnfc->fs.m_ext + 1) - |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2811 | (const void *)rxnfc) || |
| 2812 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
| 2813 | &rxnfc->fs.ring_cookie, |
| 2814 | (const void *)(&rxnfc->fs.location + 1) - |
| 2815 | (const void *)&rxnfc->fs.ring_cookie) || |
| 2816 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
| 2817 | sizeof(rxnfc->rule_cnt))) |
| 2818 | return -EFAULT; |
| 2819 | |
| 2820 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { |
| 2821 | /* As an optimisation, we only copy the actual |
| 2822 | * number of rules that the underlying |
| 2823 | * function returned. Since Mallory might |
| 2824 | * change the rule count in user memory, we |
| 2825 | * check that it is less than the rule count |
| 2826 | * originally given (as the user buffer size), |
| 2827 | * which has been range-checked. |
| 2828 | */ |
| 2829 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) |
| 2830 | return -EFAULT; |
| 2831 | if (actual_rule_cnt < rule_cnt) |
| 2832 | rule_cnt = actual_rule_cnt; |
| 2833 | if (copy_in_user(&compat_rxnfc->rule_locs[0], |
| 2834 | &rxnfc->rule_locs[0], |
| 2835 | rule_cnt * sizeof(u32))) |
| 2836 | return -EFAULT; |
| 2837 | } |
| 2838 | } |
| 2839 | |
| 2840 | return 0; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2841 | } |
| 2842 | |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2843 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
| 2844 | { |
| 2845 | void __user *uptr; |
| 2846 | compat_uptr_t uptr32; |
| 2847 | struct ifreq __user *uifr; |
| 2848 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2849 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2850 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 2851 | return -EFAULT; |
| 2852 | |
| 2853 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
| 2854 | return -EFAULT; |
| 2855 | |
| 2856 | uptr = compat_ptr(uptr32); |
| 2857 | |
| 2858 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) |
| 2859 | return -EFAULT; |
| 2860 | |
| 2861 | return dev_ioctl(net, SIOCWANDEV, uifr); |
| 2862 | } |
| 2863 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2864 | static int bond_ioctl(struct net *net, unsigned int cmd, |
| 2865 | struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2866 | { |
| 2867 | struct ifreq kifr; |
| 2868 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2869 | mm_segment_t old_fs; |
| 2870 | int err; |
| 2871 | u32 data; |
| 2872 | void __user *datap; |
| 2873 | |
| 2874 | switch (cmd) { |
| 2875 | case SIOCBONDENSLAVE: |
| 2876 | case SIOCBONDRELEASE: |
| 2877 | case SIOCBONDSETHWADDR: |
| 2878 | case SIOCBONDCHANGEACTIVE: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2879 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2880 | return -EFAULT; |
| 2881 | |
| 2882 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2883 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 2884 | err = dev_ioctl(net, cmd, |
| 2885 | (struct ifreq __user __force *) &kifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2886 | set_fs(old_fs); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2887 | |
| 2888 | return err; |
| 2889 | case SIOCBONDSLAVEINFOQUERY: |
| 2890 | case SIOCBONDINFOQUERY: |
| 2891 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 2892 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2893 | return -EFAULT; |
| 2894 | |
| 2895 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2896 | return -EFAULT; |
| 2897 | |
| 2898 | datap = compat_ptr(data); |
| 2899 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) |
| 2900 | return -EFAULT; |
| 2901 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2902 | return dev_ioctl(net, cmd, uifr); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2903 | default: |
| 2904 | return -EINVAL; |
Joe Perches | ccbd6a5 | 2010-05-14 10:58:26 +0000 | [diff] [blame] | 2905 | } |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2906 | } |
| 2907 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2908 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
| 2909 | struct compat_ifreq __user *u_ifreq32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2910 | { |
| 2911 | struct ifreq __user *u_ifreq64; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2912 | char tmp_buf[IFNAMSIZ]; |
| 2913 | void __user *data64; |
| 2914 | u32 data32; |
| 2915 | |
| 2916 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), |
| 2917 | IFNAMSIZ)) |
| 2918 | return -EFAULT; |
| 2919 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
| 2920 | return -EFAULT; |
| 2921 | data64 = compat_ptr(data32); |
| 2922 | |
| 2923 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); |
| 2924 | |
| 2925 | /* Don't check these user accesses, just let that get trapped |
| 2926 | * in the ioctl handler instead. |
| 2927 | */ |
| 2928 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
| 2929 | IFNAMSIZ)) |
| 2930 | return -EFAULT; |
| 2931 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
| 2932 | return -EFAULT; |
| 2933 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2934 | return dev_ioctl(net, cmd, u_ifreq64); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2935 | } |
| 2936 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2937 | static int dev_ifsioc(struct net *net, struct socket *sock, |
| 2938 | unsigned int cmd, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2939 | { |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2940 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2941 | int err; |
| 2942 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2943 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 2944 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) |
| 2945 | return -EFAULT; |
| 2946 | |
| 2947 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); |
| 2948 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2949 | if (!err) { |
| 2950 | switch (cmd) { |
| 2951 | case SIOCGIFFLAGS: |
| 2952 | case SIOCGIFMETRIC: |
| 2953 | case SIOCGIFMTU: |
| 2954 | case SIOCGIFMEM: |
| 2955 | case SIOCGIFHWADDR: |
| 2956 | case SIOCGIFINDEX: |
| 2957 | case SIOCGIFADDR: |
| 2958 | case SIOCGIFBRDADDR: |
| 2959 | case SIOCGIFDSTADDR: |
| 2960 | case SIOCGIFNETMASK: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 2961 | case SIOCGIFPFLAGS: |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2962 | case SIOCGIFTXQLEN: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 2963 | case SIOCGMIIPHY: |
| 2964 | case SIOCGMIIREG: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2965 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2966 | err = -EFAULT; |
| 2967 | break; |
| 2968 | } |
| 2969 | } |
| 2970 | return err; |
| 2971 | } |
| 2972 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2973 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
| 2974 | struct compat_ifreq __user *uifr32) |
| 2975 | { |
| 2976 | struct ifreq ifr; |
| 2977 | struct compat_ifmap __user *uifmap32; |
| 2978 | mm_segment_t old_fs; |
| 2979 | int err; |
| 2980 | |
| 2981 | uifmap32 = &uifr32->ifr_ifru.ifru_map; |
| 2982 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); |
| 2983 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 2984 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 2985 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 2986 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 2987 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 2988 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); |
| 2989 | if (err) |
| 2990 | return -EFAULT; |
| 2991 | |
| 2992 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2993 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 2994 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2995 | set_fs(old_fs); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2996 | |
| 2997 | if (cmd == SIOCGIFMAP && !err) { |
| 2998 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); |
| 2999 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 3000 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 3001 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 3002 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 3003 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 3004 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); |
| 3005 | if (err) |
| 3006 | err = -EFAULT; |
| 3007 | } |
| 3008 | return err; |
| 3009 | } |
| 3010 | |
| 3011 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) |
| 3012 | { |
| 3013 | void __user *uptr; |
| 3014 | compat_uptr_t uptr32; |
| 3015 | struct ifreq __user *uifr; |
| 3016 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3017 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3018 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 3019 | return -EFAULT; |
| 3020 | |
| 3021 | if (get_user(uptr32, &uifr32->ifr_data)) |
| 3022 | return -EFAULT; |
| 3023 | |
| 3024 | uptr = compat_ptr(uptr32); |
| 3025 | |
| 3026 | if (put_user(uptr, &uifr->ifr_data)) |
| 3027 | return -EFAULT; |
| 3028 | |
| 3029 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); |
| 3030 | } |
| 3031 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3032 | struct rtentry32 { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3033 | u32 rt_pad1; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3034 | struct sockaddr rt_dst; /* target address */ |
| 3035 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ |
| 3036 | struct sockaddr rt_genmask; /* target network mask (IP) */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3037 | unsigned short rt_flags; |
| 3038 | short rt_pad2; |
| 3039 | u32 rt_pad3; |
| 3040 | unsigned char rt_tos; |
| 3041 | unsigned char rt_class; |
| 3042 | short rt_pad4; |
| 3043 | short rt_metric; /* +1 for binary compatibility! */ |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3044 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3045 | u32 rt_mtu; /* per route MTU/Window */ |
| 3046 | u32 rt_window; /* Window clamping */ |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3047 | unsigned short rt_irtt; /* Initial RTT */ |
| 3048 | }; |
| 3049 | |
| 3050 | struct in6_rtmsg32 { |
| 3051 | struct in6_addr rtmsg_dst; |
| 3052 | struct in6_addr rtmsg_src; |
| 3053 | struct in6_addr rtmsg_gateway; |
| 3054 | u32 rtmsg_type; |
| 3055 | u16 rtmsg_dst_len; |
| 3056 | u16 rtmsg_src_len; |
| 3057 | u32 rtmsg_metric; |
| 3058 | u32 rtmsg_info; |
| 3059 | u32 rtmsg_flags; |
| 3060 | s32 rtmsg_ifindex; |
| 3061 | }; |
| 3062 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3063 | static int routing_ioctl(struct net *net, struct socket *sock, |
| 3064 | unsigned int cmd, void __user *argp) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3065 | { |
| 3066 | int ret; |
| 3067 | void *r = NULL; |
| 3068 | struct in6_rtmsg r6; |
| 3069 | struct rtentry r4; |
| 3070 | char devname[16]; |
| 3071 | u32 rtdev; |
| 3072 | mm_segment_t old_fs = get_fs(); |
| 3073 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3074 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
| 3075 | struct in6_rtmsg32 __user *ur6 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3076 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3077 | 3 * sizeof(struct in6_addr)); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3078 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
| 3079 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); |
| 3080 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); |
| 3081 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); |
| 3082 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); |
| 3083 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); |
| 3084 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3085 | |
| 3086 | r = (void *) &r6; |
| 3087 | } else { /* ipv4 */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3088 | struct rtentry32 __user *ur4 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3089 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3090 | 3 * sizeof(struct sockaddr)); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3091 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
| 3092 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); |
| 3093 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); |
| 3094 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); |
| 3095 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); |
| 3096 | ret |= __get_user(rtdev, &(ur4->rt_dev)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3097 | if (rtdev) { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3098 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3099 | r4.rt_dev = (char __user __force *)devname; |
| 3100 | devname[15] = 0; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3101 | } else |
| 3102 | r4.rt_dev = NULL; |
| 3103 | |
| 3104 | r = (void *) &r4; |
| 3105 | } |
| 3106 | |
| 3107 | if (ret) { |
| 3108 | ret = -EFAULT; |
| 3109 | goto out; |
| 3110 | } |
| 3111 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3112 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3113 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3114 | set_fs(old_fs); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3115 | |
| 3116 | out: |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3117 | return ret; |
| 3118 | } |
| 3119 | |
| 3120 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE |
| 3121 | * 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] | 3122 | * use compatible ioctls |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3123 | */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3124 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3125 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3126 | compat_ulong_t tmp; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3127 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3128 | if (get_user(tmp, argp)) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3129 | return -EFAULT; |
| 3130 | if (tmp == BRCTL_GET_VERSION) |
| 3131 | return BRCTL_VERSION + 1; |
| 3132 | return -EINVAL; |
| 3133 | } |
| 3134 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3135 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
| 3136 | unsigned int cmd, unsigned long arg) |
| 3137 | { |
| 3138 | void __user *argp = compat_ptr(arg); |
| 3139 | struct sock *sk = sock->sk; |
| 3140 | struct net *net = sock_net(sk); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3141 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3142 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
| 3143 | return siocdevprivate_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3144 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3145 | switch (cmd) { |
| 3146 | case SIOCSIFBR: |
| 3147 | case SIOCGIFBR: |
| 3148 | return old_bridge_ioctl(argp); |
| 3149 | case SIOCGIFNAME: |
| 3150 | return dev_ifname32(net, argp); |
| 3151 | case SIOCGIFCONF: |
| 3152 | return dev_ifconf(net, argp); |
| 3153 | case SIOCETHTOOL: |
| 3154 | return ethtool_ioctl(net, argp); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3155 | case SIOCWANDEV: |
| 3156 | return compat_siocwandev(net, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3157 | case SIOCGIFMAP: |
| 3158 | case SIOCSIFMAP: |
| 3159 | return compat_sioc_ifmap(net, cmd, argp); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3160 | case SIOCBONDENSLAVE: |
| 3161 | case SIOCBONDRELEASE: |
| 3162 | case SIOCBONDSETHWADDR: |
| 3163 | case SIOCBONDSLAVEINFOQUERY: |
| 3164 | case SIOCBONDINFOQUERY: |
| 3165 | case SIOCBONDCHANGEACTIVE: |
| 3166 | return bond_ioctl(net, cmd, argp); |
| 3167 | case SIOCADDRT: |
| 3168 | case SIOCDELRT: |
| 3169 | return routing_ioctl(net, sock, cmd, argp); |
| 3170 | case SIOCGSTAMP: |
| 3171 | return do_siocgstamp(net, sock, cmd, argp); |
| 3172 | case SIOCGSTAMPNS: |
| 3173 | return do_siocgstampns(net, sock, cmd, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3174 | case SIOCSHWTSTAMP: |
| 3175 | return compat_siocshwtstamp(net, argp); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3176 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3177 | case FIOSETOWN: |
| 3178 | case SIOCSPGRP: |
| 3179 | case FIOGETOWN: |
| 3180 | case SIOCGPGRP: |
| 3181 | case SIOCBRADDBR: |
| 3182 | case SIOCBRDELBR: |
| 3183 | case SIOCGIFVLAN: |
| 3184 | case SIOCSIFVLAN: |
| 3185 | case SIOCADDDLCI: |
| 3186 | case SIOCDELDLCI: |
| 3187 | return sock_ioctl(file, cmd, arg); |
| 3188 | |
| 3189 | case SIOCGIFFLAGS: |
| 3190 | case SIOCSIFFLAGS: |
| 3191 | case SIOCGIFMETRIC: |
| 3192 | case SIOCSIFMETRIC: |
| 3193 | case SIOCGIFMTU: |
| 3194 | case SIOCSIFMTU: |
| 3195 | case SIOCGIFMEM: |
| 3196 | case SIOCSIFMEM: |
| 3197 | case SIOCGIFHWADDR: |
| 3198 | case SIOCSIFHWADDR: |
| 3199 | case SIOCADDMULTI: |
| 3200 | case SIOCDELMULTI: |
| 3201 | case SIOCGIFINDEX: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3202 | case SIOCGIFADDR: |
| 3203 | case SIOCSIFADDR: |
| 3204 | case SIOCSIFHWBROADCAST: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3205 | case SIOCDIFADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3206 | case SIOCGIFBRDADDR: |
| 3207 | case SIOCSIFBRDADDR: |
| 3208 | case SIOCGIFDSTADDR: |
| 3209 | case SIOCSIFDSTADDR: |
| 3210 | case SIOCGIFNETMASK: |
| 3211 | case SIOCSIFNETMASK: |
| 3212 | case SIOCSIFPFLAGS: |
| 3213 | case SIOCGIFPFLAGS: |
| 3214 | case SIOCGIFTXQLEN: |
| 3215 | case SIOCSIFTXQLEN: |
| 3216 | case SIOCBRADDIF: |
| 3217 | case SIOCBRDELIF: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3218 | case SIOCSIFNAME: |
| 3219 | case SIOCGMIIPHY: |
| 3220 | case SIOCGMIIREG: |
| 3221 | case SIOCSMIIREG: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3222 | return dev_ifsioc(net, sock, cmd, argp); |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3223 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3224 | case SIOCSARP: |
| 3225 | case SIOCGARP: |
| 3226 | case SIOCDARP: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3227 | case SIOCATMARK: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3228 | return sock_do_ioctl(net, sock, cmd, arg); |
| 3229 | } |
| 3230 | |
| 3231 | /* Prevent warning from compat_sys_ioctl, these always |
| 3232 | * result in -EINVAL in the native case anyway. */ |
| 3233 | switch (cmd) { |
| 3234 | case SIOCRTMSG: |
| 3235 | case SIOCGIFCOUNT: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3236 | case SIOCSRARP: |
| 3237 | case SIOCGRARP: |
| 3238 | case SIOCDRARP: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3239 | case SIOCSIFLINK: |
| 3240 | case SIOCGIFSLAVE: |
| 3241 | case SIOCSIFSLAVE: |
| 3242 | return -EINVAL; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3243 | } |
| 3244 | |
| 3245 | return -ENOIOCTLCMD; |
| 3246 | } |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3247 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3248 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3249 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3250 | { |
| 3251 | struct socket *sock = file->private_data; |
| 3252 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3253 | struct sock *sk; |
| 3254 | struct net *net; |
| 3255 | |
| 3256 | sk = sock->sk; |
| 3257 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3258 | |
| 3259 | if (sock->ops->compat_ioctl) |
| 3260 | ret = sock->ops->compat_ioctl(sock, cmd, arg); |
| 3261 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3262 | if (ret == -ENOIOCTLCMD && |
| 3263 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 3264 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 3265 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3266 | if (ret == -ENOIOCTLCMD) |
| 3267 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
| 3268 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3269 | return ret; |
| 3270 | } |
| 3271 | #endif |
| 3272 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3273 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 3274 | { |
| 3275 | return sock->ops->bind(sock, addr, addrlen); |
| 3276 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3277 | EXPORT_SYMBOL(kernel_bind); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3278 | |
| 3279 | int kernel_listen(struct socket *sock, int backlog) |
| 3280 | { |
| 3281 | return sock->ops->listen(sock, backlog); |
| 3282 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3283 | EXPORT_SYMBOL(kernel_listen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3284 | |
| 3285 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 3286 | { |
| 3287 | struct sock *sk = sock->sk; |
| 3288 | int err; |
| 3289 | |
| 3290 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 3291 | newsock); |
| 3292 | if (err < 0) |
| 3293 | goto done; |
| 3294 | |
| 3295 | err = sock->ops->accept(sock, *newsock, flags); |
| 3296 | if (err < 0) { |
| 3297 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 3298 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3299 | goto done; |
| 3300 | } |
| 3301 | |
| 3302 | (*newsock)->ops = sock->ops; |
Wei Yongjun | 1b08534 | 2008-12-18 19:35:10 -0800 | [diff] [blame] | 3303 | __module_get((*newsock)->ops->owner); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3304 | |
| 3305 | done: |
| 3306 | return err; |
| 3307 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3308 | EXPORT_SYMBOL(kernel_accept); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3309 | |
| 3310 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 3311 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3312 | { |
| 3313 | return sock->ops->connect(sock, addr, addrlen, flags); |
| 3314 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3315 | EXPORT_SYMBOL(kernel_connect); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3316 | |
| 3317 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
| 3318 | int *addrlen) |
| 3319 | { |
| 3320 | return sock->ops->getname(sock, addr, addrlen, 0); |
| 3321 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3322 | EXPORT_SYMBOL(kernel_getsockname); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3323 | |
| 3324 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
| 3325 | int *addrlen) |
| 3326 | { |
| 3327 | return sock->ops->getname(sock, addr, addrlen, 1); |
| 3328 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3329 | EXPORT_SYMBOL(kernel_getpeername); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3330 | |
| 3331 | int kernel_getsockopt(struct socket *sock, int level, int optname, |
| 3332 | char *optval, int *optlen) |
| 3333 | { |
| 3334 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3335 | char __user *uoptval; |
| 3336 | int __user *uoptlen; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3337 | int err; |
| 3338 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3339 | uoptval = (char __user __force *) optval; |
| 3340 | uoptlen = (int __user __force *) optlen; |
| 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_getsockopt(sock, level, optname, uoptval, uoptlen); |
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->getsockopt(sock, level, optname, uoptval, |
| 3347 | uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3348 | set_fs(oldfs); |
| 3349 | return err; |
| 3350 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3351 | EXPORT_SYMBOL(kernel_getsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3352 | |
| 3353 | int kernel_setsockopt(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3354 | char *optval, unsigned int optlen) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3355 | { |
| 3356 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3357 | char __user *uoptval; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3358 | int err; |
| 3359 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3360 | uoptval = (char __user __force *) optval; |
| 3361 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3362 | set_fs(KERNEL_DS); |
| 3363 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3364 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3365 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3366 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3367 | optlen); |
| 3368 | set_fs(oldfs); |
| 3369 | return err; |
| 3370 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3371 | EXPORT_SYMBOL(kernel_setsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3372 | |
| 3373 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
| 3374 | size_t size, int flags) |
| 3375 | { |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 3376 | sock_update_classid(sock->sk); |
| 3377 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3378 | if (sock->ops->sendpage) |
| 3379 | return sock->ops->sendpage(sock, page, offset, size, flags); |
| 3380 | |
| 3381 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 3382 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3383 | EXPORT_SYMBOL(kernel_sendpage); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3384 | |
| 3385 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
| 3386 | { |
| 3387 | mm_segment_t oldfs = get_fs(); |
| 3388 | int err; |
| 3389 | |
| 3390 | set_fs(KERNEL_DS); |
| 3391 | err = sock->ops->ioctl(sock, cmd, arg); |
| 3392 | set_fs(oldfs); |
| 3393 | |
| 3394 | return err; |
| 3395 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3396 | EXPORT_SYMBOL(kernel_sock_ioctl); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3397 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3398 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 3399 | { |
| 3400 | return sock->ops->shutdown(sock, how); |
| 3401 | } |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3402 | EXPORT_SYMBOL(kernel_sock_shutdown); |