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/if_bridge.h> |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 73 | #include <linux/if_frad.h> |
| 74 | #include <linux/if_vlan.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | #include <linux/init.h> |
| 76 | #include <linux/poll.h> |
| 77 | #include <linux/cache.h> |
| 78 | #include <linux/module.h> |
| 79 | #include <linux/highmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | #include <linux/mount.h> |
| 81 | #include <linux/security.h> |
| 82 | #include <linux/syscalls.h> |
| 83 | #include <linux/compat.h> |
| 84 | #include <linux/kmod.h> |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 85 | #include <linux/audit.h> |
Adrian Bunk | d86b5e0 | 2006-01-21 00:46:55 +0100 | [diff] [blame] | 86 | #include <linux/wireless.h> |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 87 | #include <linux/nsproxy.h> |
Nick Black | 1fd7317d | 2009-09-22 16:43:33 -0700 | [diff] [blame] | 88 | #include <linux/magic.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 89 | #include <linux/slab.h> |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 90 | #include <linux/xattr.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> |
Eliezer Tamir | 076bb0c | 2013-07-10 17:13:17 +0300 | [diff] [blame] | 107 | #include <net/busy_poll.h> |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 108 | |
Cong Wang | e0d1095 | 2013-08-01 11:10:25 +0800 | [diff] [blame] | 109 | #ifdef CONFIG_NET_RX_BUSY_POLL |
Eliezer Tamir | 64b0dc5 | 2013-07-10 17:13:36 +0300 | [diff] [blame] | 110 | unsigned int sysctl_net_busy_read __read_mostly; |
| 111 | unsigned int sysctl_net_busy_poll __read_mostly; |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 112 | #endif |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 113 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 115 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 116 | unsigned long nr_segs, loff_t pos); |
| 117 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 118 | unsigned long nr_segs, loff_t pos); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 119 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
| 121 | static int sock_close(struct inode *inode, struct file *file); |
| 122 | static unsigned int sock_poll(struct file *file, |
| 123 | struct poll_table_struct *wait); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 124 | 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] | 125 | #ifdef CONFIG_COMPAT |
| 126 | static long compat_sock_ioctl(struct file *file, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 127 | unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 128 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static int sock_fasync(int fd, struct file *filp, int on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 131 | int offset, size_t size, loff_t *ppos, int more); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 132 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 133 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 134 | unsigned int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | /* |
| 137 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear |
| 138 | * in the operation structures but are done directly via the socketcall() multiplexor. |
| 139 | */ |
| 140 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 141 | static const struct file_operations socket_file_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | .owner = THIS_MODULE, |
| 143 | .llseek = no_llseek, |
| 144 | .aio_read = sock_aio_read, |
| 145 | .aio_write = sock_aio_write, |
| 146 | .poll = sock_poll, |
| 147 | .unlocked_ioctl = sock_ioctl, |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 148 | #ifdef CONFIG_COMPAT |
| 149 | .compat_ioctl = compat_sock_ioctl, |
| 150 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | .mmap = sock_mmap, |
| 152 | .open = sock_no_open, /* special open code to disallow open via /proc */ |
| 153 | .release = sock_close, |
| 154 | .fasync = sock_fasync, |
Jens Axboe | 5274f05 | 2006-03-30 15:15:30 +0200 | [diff] [blame] | 155 | .sendpage = sock_sendpage, |
| 156 | .splice_write = generic_splice_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 157 | .splice_read = sock_splice_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | }; |
| 159 | |
| 160 | /* |
| 161 | * The protocol list. Each protocol is registered in here. |
| 162 | */ |
| 163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | static DEFINE_SPINLOCK(net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 165 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | /* |
| 168 | * Statistics counters of the socket lists |
| 169 | */ |
| 170 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 171 | static DEFINE_PER_CPU(int, sockets_in_use); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
| 173 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 174 | * Support routines. |
| 175 | * Move socket addresses back and forth across the kernel/user |
| 176 | * divide and look after the messy bits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | */ |
| 178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | /** |
| 180 | * move_addr_to_kernel - copy a socket address into kernel space |
| 181 | * @uaddr: Address in user space |
| 182 | * @kaddr: Address in kernel space |
| 183 | * @ulen: Length in user space |
| 184 | * |
| 185 | * The address is copied into kernel space. If the provided address is |
| 186 | * too long an error code of -EINVAL is returned. If the copy gives |
| 187 | * invalid addresses -EFAULT is returned. On a success 0 is returned. |
| 188 | */ |
| 189 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 190 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 192 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 194 | if (ulen == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | return 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 196 | if (copy_from_user(kaddr, uaddr, ulen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 198 | return audit_sockaddr(ulen, kaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
| 200 | |
| 201 | /** |
| 202 | * move_addr_to_user - copy an address to user space |
| 203 | * @kaddr: kernel space address |
| 204 | * @klen: length of address in kernel |
| 205 | * @uaddr: user space address |
| 206 | * @ulen: pointer to user length field |
| 207 | * |
| 208 | * The value pointed to by ulen on entry is the buffer length available. |
| 209 | * This is overwritten with the buffer space used. -EINVAL is returned |
| 210 | * if an overlong buffer is specified or a negative buffer size. -EFAULT |
| 211 | * is returned if either the buffer or the length field are not |
| 212 | * accessible. |
| 213 | * After copying the data up to the limit the user specifies, the true |
| 214 | * length of the data is written over the length limit the user |
| 215 | * specified. Zero is returned for a success. |
| 216 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 217 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 218 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 219 | void __user *uaddr, int __user *ulen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
| 221 | int err; |
| 222 | int len; |
| 223 | |
Hannes Frederic Sowa | 68c6beb | 2013-11-21 03:14:34 +0100 | [diff] [blame] | 224 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 225 | err = get_user(len, ulen); |
| 226 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 228 | if (len > klen) |
| 229 | len = klen; |
Hannes Frederic Sowa | 68c6beb | 2013-11-21 03:14:34 +0100 | [diff] [blame] | 230 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 232 | if (len) { |
Steve Grubb | d6fe394 | 2006-03-30 12:20:22 -0500 | [diff] [blame] | 233 | if (audit_sockaddr(klen, kaddr)) |
| 234 | return -ENOMEM; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 235 | if (copy_to_user(uaddr, kaddr, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | return -EFAULT; |
| 237 | } |
| 238 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 239 | * "fromlen shall refer to the value before truncation.." |
| 240 | * 1003.1g |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | */ |
| 242 | return __put_user(klen, ulen); |
| 243 | } |
| 244 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 245 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | static struct inode *sock_alloc_inode(struct super_block *sb) |
| 248 | { |
| 249 | struct socket_alloc *ei; |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 250 | struct socket_wq *wq; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 251 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 252 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | if (!ei) |
| 254 | return NULL; |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 255 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
| 256 | if (!wq) { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 257 | kmem_cache_free(sock_inode_cachep, ei); |
| 258 | return NULL; |
| 259 | } |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 260 | init_waitqueue_head(&wq->wait); |
| 261 | wq->fasync_list = NULL; |
| 262 | RCU_INIT_POINTER(ei->socket.wq, wq); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | ei->socket.state = SS_UNCONNECTED; |
| 265 | ei->socket.flags = 0; |
| 266 | ei->socket.ops = NULL; |
| 267 | ei->socket.sk = NULL; |
| 268 | ei->socket.file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | return &ei->vfs_inode; |
| 271 | } |
| 272 | |
| 273 | static void sock_destroy_inode(struct inode *inode) |
| 274 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 275 | struct socket_alloc *ei; |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 276 | struct socket_wq *wq; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 277 | |
| 278 | ei = container_of(inode, struct socket_alloc, vfs_inode); |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 279 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
Lai Jiangshan | 6184522 | 2011-03-18 12:10:25 +0800 | [diff] [blame] | 280 | kfree_rcu(wq, rcu); |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 281 | kmem_cache_free(sock_inode_cachep, ei); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 284 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 286 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 288 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | static int init_inodecache(void) |
| 292 | { |
| 293 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 294 | sizeof(struct socket_alloc), |
| 295 | 0, |
| 296 | (SLAB_HWCACHE_ALIGN | |
| 297 | SLAB_RECLAIM_ACCOUNT | |
| 298 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 299 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | if (sock_inode_cachep == NULL) |
| 301 | return -ENOMEM; |
| 302 | return 0; |
| 303 | } |
| 304 | |
Alexey Dobriyan | b87221d | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 305 | static const struct super_operations sockfs_ops = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 306 | .alloc_inode = sock_alloc_inode, |
| 307 | .destroy_inode = sock_destroy_inode, |
| 308 | .statfs = simple_statfs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | }; |
| 310 | |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 311 | /* |
| 312 | * sockfs_dname() is called from d_path(). |
| 313 | */ |
| 314 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) |
| 315 | { |
| 316 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", |
| 317 | dentry->d_inode->i_ino); |
| 318 | } |
| 319 | |
Al Viro | 3ba13d1 | 2009-02-20 06:02:22 +0000 | [diff] [blame] | 320 | static const struct dentry_operations sockfs_dentry_operations = { |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 321 | .d_dname = sockfs_dname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | }; |
| 323 | |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 324 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
| 325 | int flags, const char *dev_name, void *data) |
| 326 | { |
| 327 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, |
| 328 | &sockfs_dentry_operations, SOCKFS_MAGIC); |
| 329 | } |
| 330 | |
| 331 | static struct vfsmount *sock_mnt __read_mostly; |
| 332 | |
| 333 | static struct file_system_type sock_fs_type = { |
| 334 | .name = "sockfs", |
| 335 | .mount = sockfs_mount, |
| 336 | .kill_sb = kill_anon_super, |
| 337 | }; |
| 338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | /* |
| 340 | * Obtains the first available file descriptor and sets it up for use. |
| 341 | * |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 342 | * These functions create file structures and maps them to fd space |
| 343 | * of the current process. On success it returns file descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | * and file struct implicitly stored in sock->file. |
| 345 | * Note that another thread may close file descriptor before we return |
| 346 | * from this function. We use the fact that now we do not refer |
| 347 | * to socket after mapping. If one day we will need it, this |
| 348 | * function will increment ref. count on file by 1. |
| 349 | * |
| 350 | * In any case returned fd MAY BE not valid! |
| 351 | * This race condition is unavoidable |
| 352 | * with shared fd spaces, we cannot solve it inside kernel, |
| 353 | * but we take care of internal coherence yet. |
| 354 | */ |
| 355 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 356 | struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | { |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 358 | struct qstr name = { .name = "" }; |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 359 | struct path path; |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 360 | struct file *file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 361 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 362 | if (dname) { |
| 363 | name.name = dname; |
| 364 | name.len = strlen(name.name); |
| 365 | } else if (sock->sk) { |
| 366 | name.name = sock->sk->sk_prot_creator->name; |
| 367 | name.len = strlen(name.name); |
| 368 | } |
Nick Piggin | 4b93688 | 2011-01-07 17:50:07 +1100 | [diff] [blame] | 369 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 370 | if (unlikely(!path.dentry)) |
| 371 | return ERR_PTR(-ENOMEM); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 372 | path.mnt = mntget(sock_mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 374 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 375 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
| 376 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 377 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 378 | &socket_file_ops); |
Anatol Pomozov | 39b6525 | 2012-09-12 20:11:55 -0700 | [diff] [blame] | 379 | if (unlikely(IS_ERR(file))) { |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 380 | /* drop dentry, keep inode */ |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 381 | ihold(path.dentry->d_inode); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 382 | path_put(&path); |
Anatol Pomozov | 39b6525 | 2012-09-12 20:11:55 -0700 | [diff] [blame] | 383 | return file; |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 384 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 385 | |
| 386 | sock->file = file; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 387 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 388 | file->private_data = sock; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 389 | return file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 390 | } |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 391 | EXPORT_SYMBOL(sock_alloc_file); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 392 | |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 393 | static int sock_map_fd(struct socket *sock, int flags) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 394 | { |
| 395 | struct file *newfile; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 396 | int fd = get_unused_fd_flags(flags); |
| 397 | if (unlikely(fd < 0)) |
| 398 | return fd; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 399 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 400 | newfile = sock_alloc_file(sock, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 401 | if (likely(!IS_ERR(newfile))) { |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 402 | fd_install(fd, newfile); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 403 | return fd; |
| 404 | } |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 405 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 406 | put_unused_fd(fd); |
| 407 | return PTR_ERR(newfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 410 | struct socket *sock_from_file(struct file *file, int *err) |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 411 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 412 | if (file->f_op == &socket_file_ops) |
| 413 | return file->private_data; /* set in sock_map_fd */ |
| 414 | |
Eric Dumazet | 23bb80d | 2007-02-08 14:59:57 -0800 | [diff] [blame] | 415 | *err = -ENOTSOCK; |
| 416 | return NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 417 | } |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 418 | EXPORT_SYMBOL(sock_from_file); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 419 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | /** |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 421 | * sockfd_lookup - Go from a file number to its socket slot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | * @fd: file handle |
| 423 | * @err: pointer to an error code return |
| 424 | * |
| 425 | * The file handle passed in is locked and the socket it is bound |
| 426 | * too is returned. If an error occurs the err pointer is overwritten |
| 427 | * with a negative errno code and NULL is returned. The function checks |
| 428 | * for both invalid handles and passing a handle which is not a socket. |
| 429 | * |
| 430 | * On a success the socket object pointer is returned. |
| 431 | */ |
| 432 | |
| 433 | struct socket *sockfd_lookup(int fd, int *err) |
| 434 | { |
| 435 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | struct socket *sock; |
| 437 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 438 | file = fget(fd); |
| 439 | if (!file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | *err = -EBADF; |
| 441 | return NULL; |
| 442 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 443 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 444 | sock = sock_from_file(file, err); |
| 445 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | fput(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | return sock; |
| 448 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 449 | EXPORT_SYMBOL(sockfd_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 451 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
| 452 | { |
| 453 | struct file *file; |
| 454 | struct socket *sock; |
| 455 | |
Hua Zhong | 3672558 | 2006-04-19 15:25:02 -0700 | [diff] [blame] | 456 | *err = -EBADF; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 457 | file = fget_light(fd, fput_needed); |
| 458 | if (file) { |
| 459 | sock = sock_from_file(file, err); |
| 460 | if (sock) |
| 461 | return sock; |
| 462 | fput_light(file, *fput_needed); |
| 463 | } |
| 464 | return NULL; |
| 465 | } |
| 466 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 467 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
| 468 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) |
| 469 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) |
| 470 | static ssize_t sockfs_getxattr(struct dentry *dentry, |
| 471 | const char *name, void *value, size_t size) |
| 472 | { |
| 473 | const char *proto_name; |
| 474 | size_t proto_size; |
| 475 | int error; |
| 476 | |
| 477 | error = -ENODATA; |
| 478 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { |
| 479 | proto_name = dentry->d_name.name; |
| 480 | proto_size = strlen(proto_name); |
| 481 | |
| 482 | if (value) { |
| 483 | error = -ERANGE; |
| 484 | if (proto_size + 1 > size) |
| 485 | goto out; |
| 486 | |
| 487 | strncpy(value, proto_name, proto_size + 1); |
| 488 | } |
| 489 | error = proto_size + 1; |
| 490 | } |
| 491 | |
| 492 | out: |
| 493 | return error; |
| 494 | } |
| 495 | |
| 496 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, |
| 497 | size_t size) |
| 498 | { |
| 499 | ssize_t len; |
| 500 | ssize_t used = 0; |
| 501 | |
| 502 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); |
| 503 | if (len < 0) |
| 504 | return len; |
| 505 | used += len; |
| 506 | if (buffer) { |
| 507 | if (size < used) |
| 508 | return -ERANGE; |
| 509 | buffer += len; |
| 510 | } |
| 511 | |
| 512 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); |
| 513 | used += len; |
| 514 | if (buffer) { |
| 515 | if (size < used) |
| 516 | return -ERANGE; |
| 517 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); |
| 518 | buffer += len; |
| 519 | } |
| 520 | |
| 521 | return used; |
| 522 | } |
| 523 | |
| 524 | static const struct inode_operations sockfs_inode_ops = { |
| 525 | .getxattr = sockfs_getxattr, |
| 526 | .listxattr = sockfs_listxattr, |
| 527 | }; |
| 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | /** |
| 530 | * sock_alloc - allocate a socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 531 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | * Allocate a new inode and socket object. The two are bound together |
| 533 | * and initialised. The socket is then returned. If we are out of inodes |
| 534 | * NULL is returned. |
| 535 | */ |
| 536 | |
| 537 | static struct socket *sock_alloc(void) |
| 538 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 539 | struct inode *inode; |
| 540 | struct socket *sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | |
Eric Dumazet | a209dfc | 2011-07-26 11:36:34 +0200 | [diff] [blame] | 542 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | if (!inode) |
| 544 | return NULL; |
| 545 | |
| 546 | sock = SOCKET_I(inode); |
| 547 | |
Eric Dumazet | 29a020d | 2009-09-15 02:39:20 -0700 | [diff] [blame] | 548 | kmemcheck_annotate_bitfield(sock, type); |
Christoph Hellwig | 85fe402 | 2010-10-23 11:19:54 -0400 | [diff] [blame] | 549 | inode->i_ino = get_next_ino(); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 550 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
David Howells | 8192b0c | 2008-11-14 10:39:10 +1100 | [diff] [blame] | 551 | inode->i_uid = current_fsuid(); |
| 552 | inode->i_gid = current_fsgid(); |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 553 | inode->i_op = &sockfs_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | |
Alex Shi | 19e8d69 | 2012-05-14 14:15:31 -0700 | [diff] [blame] | 555 | this_cpu_add(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | return sock; |
| 557 | } |
| 558 | |
| 559 | /* |
| 560 | * In theory you can't get an open on this inode, but /proc provides |
| 561 | * a back door. Remember to keep it shut otherwise you'll let the |
| 562 | * creepy crawlies in. |
| 563 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 564 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 565 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
| 566 | { |
| 567 | return -ENXIO; |
| 568 | } |
| 569 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 570 | const struct file_operations bad_sock_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | .owner = THIS_MODULE, |
| 572 | .open = sock_no_open, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 573 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | }; |
| 575 | |
| 576 | /** |
| 577 | * sock_release - close a socket |
| 578 | * @sock: socket to close |
| 579 | * |
| 580 | * The socket is released from the protocol stack if it has a release |
| 581 | * 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] | 582 | * an inode not a file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 584 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | void sock_release(struct socket *sock) |
| 586 | { |
| 587 | if (sock->ops) { |
| 588 | struct module *owner = sock->ops->owner; |
| 589 | |
| 590 | sock->ops->release(sock); |
| 591 | sock->ops = NULL; |
| 592 | module_put(owner); |
| 593 | } |
| 594 | |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 595 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
| 597 | |
Mikulas Patocka | b09e786 | 2012-07-19 06:13:36 +0000 | [diff] [blame] | 598 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
| 599 | return; |
| 600 | |
Alex Shi | 19e8d69 | 2012-05-14 14:15:31 -0700 | [diff] [blame] | 601 | this_cpu_sub(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | if (!sock->file) { |
| 603 | iput(SOCK_INODE(sock)); |
| 604 | return; |
| 605 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 606 | sock->file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 608 | EXPORT_SYMBOL(sock_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Daniel Borkmann | bf84a010 | 2013-04-14 08:08:13 +0000 | [diff] [blame] | 610 | void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 611 | { |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 612 | *tx_flags = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 613 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 614 | *tx_flags |= SKBTX_HW_TSTAMP; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 615 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
Oliver Hartkopp | 2244d07 | 2010-08-17 08:59:14 +0000 | [diff] [blame] | 616 | *tx_flags |= SKBTX_SW_TSTAMP; |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 617 | if (sock_flag(sk, SOCK_WIFI_STATUS)) |
| 618 | *tx_flags |= SKBTX_WIFI_STATUS; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 619 | } |
| 620 | EXPORT_SYMBOL(sock_tx_timestamp); |
| 621 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 622 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 623 | struct msghdr *msg, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | { |
| 625 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | |
| 627 | si->sock = sock; |
| 628 | si->scm = NULL; |
| 629 | si->msg = msg; |
| 630 | si->size = size; |
| 631 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | return sock->ops->sendmsg(iocb, sock, msg, size); |
| 633 | } |
| 634 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 635 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 636 | struct msghdr *msg, size_t size) |
| 637 | { |
| 638 | int err = security_socket_sendmsg(sock, msg, size); |
| 639 | |
| 640 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); |
| 641 | } |
| 642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
| 644 | { |
| 645 | struct kiocb iocb; |
| 646 | struct sock_iocb siocb; |
| 647 | int ret; |
| 648 | |
| 649 | init_sync_kiocb(&iocb, NULL); |
| 650 | iocb.private = &siocb; |
| 651 | ret = __sock_sendmsg(&iocb, sock, msg, size); |
| 652 | if (-EIOCBQUEUED == ret) |
| 653 | ret = wait_on_sync_kiocb(&iocb); |
| 654 | return ret; |
| 655 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 656 | EXPORT_SYMBOL(sock_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
Eric Dumazet | 894dc24 | 2011-07-26 02:39:41 +0000 | [diff] [blame] | 658 | 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] | 659 | { |
| 660 | struct kiocb iocb; |
| 661 | struct sock_iocb siocb; |
| 662 | int ret; |
| 663 | |
| 664 | init_sync_kiocb(&iocb, NULL); |
| 665 | iocb.private = &siocb; |
| 666 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); |
| 667 | if (-EIOCBQUEUED == ret) |
| 668 | ret = wait_on_sync_kiocb(&iocb); |
| 669 | return ret; |
| 670 | } |
| 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 673 | struct kvec *vec, size_t num, size_t size) |
| 674 | { |
| 675 | mm_segment_t oldfs = get_fs(); |
| 676 | int result; |
| 677 | |
| 678 | set_fs(KERNEL_DS); |
| 679 | /* |
| 680 | * the following is safe, since for compiler definitions of kvec and |
| 681 | * iovec are identical, yielding the same in-core layout and alignment |
| 682 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 683 | msg->msg_iov = (struct iovec *)vec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | msg->msg_iovlen = num; |
| 685 | result = sock_sendmsg(sock, msg, size); |
| 686 | set_fs(oldfs); |
| 687 | return result; |
| 688 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 689 | EXPORT_SYMBOL(kernel_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 691 | /* |
| 692 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 693 | */ |
| 694 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 695 | struct sk_buff *skb) |
| 696 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 697 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
| 698 | struct timespec ts[3]; |
| 699 | int empty = 1; |
| 700 | struct skb_shared_hwtstamps *shhwtstamps = |
| 701 | skb_hwtstamps(skb); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 702 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 703 | /* Race occurred between timestamp enabling and packet |
| 704 | receiving. Fill in the current time for now. */ |
| 705 | if (need_software_tstamp && skb->tstamp.tv64 == 0) |
| 706 | __net_timestamp(skb); |
| 707 | |
| 708 | if (need_software_tstamp) { |
| 709 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
| 710 | struct timeval tv; |
| 711 | skb_get_timestamp(skb, &tv); |
| 712 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, |
| 713 | sizeof(tv), &tv); |
| 714 | } else { |
Hagen Paul Pfeifer | 842509b | 2010-04-06 05:39:52 +0000 | [diff] [blame] | 715 | skb_get_timestampns(skb, &ts[0]); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 716 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
Hagen Paul Pfeifer | 842509b | 2010-04-06 05:39:52 +0000 | [diff] [blame] | 717 | sizeof(ts[0]), &ts[0]); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 718 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 719 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 720 | |
| 721 | |
| 722 | memset(ts, 0, sizeof(ts)); |
Daniel Borkmann | 6e94d1e | 2013-04-16 01:29:10 +0000 | [diff] [blame] | 723 | if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) && |
| 724 | ktime_to_timespec_cond(skb->tstamp, ts + 0)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 725 | empty = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 726 | if (shhwtstamps) { |
| 727 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && |
Daniel Borkmann | 6e94d1e | 2013-04-16 01:29:10 +0000 | [diff] [blame] | 728 | ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 729 | empty = 0; |
| 730 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && |
Daniel Borkmann | 6e94d1e | 2013-04-16 01:29:10 +0000 | [diff] [blame] | 731 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 732 | empty = 0; |
| 733 | } |
| 734 | if (!empty) |
| 735 | put_cmsg(msg, SOL_SOCKET, |
| 736 | SCM_TIMESTAMPING, sizeof(ts), &ts); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 737 | } |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 738 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 739 | |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 740 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
| 741 | struct sk_buff *skb) |
| 742 | { |
| 743 | int ack; |
| 744 | |
| 745 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) |
| 746 | return; |
| 747 | if (!skb->wifi_acked_valid) |
| 748 | return; |
| 749 | |
| 750 | ack = skb->wifi_acked; |
| 751 | |
| 752 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); |
| 753 | } |
| 754 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); |
| 755 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 756 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
| 757 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 758 | { |
| 759 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) |
| 760 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
| 761 | sizeof(__u32), &skb->dropcount); |
| 762 | } |
| 763 | |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 764 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 765 | struct sk_buff *skb) |
| 766 | { |
| 767 | sock_recv_timestamp(msg, sk, skb); |
| 768 | sock_recv_drops(msg, sk, skb); |
| 769 | } |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 770 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 771 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 772 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 773 | struct msghdr *msg, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
| 776 | |
| 777 | si->sock = sock; |
| 778 | si->scm = NULL; |
| 779 | si->msg = msg; |
| 780 | si->size = size; |
| 781 | si->flags = flags; |
| 782 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
| 784 | } |
| 785 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 786 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 787 | struct msghdr *msg, size_t size, int flags) |
| 788 | { |
| 789 | int err = security_socket_recvmsg(sock, msg, size, flags); |
| 790 | |
| 791 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); |
| 792 | } |
| 793 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 794 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | size_t size, int flags) |
| 796 | { |
| 797 | struct kiocb iocb; |
| 798 | struct sock_iocb siocb; |
| 799 | int ret; |
| 800 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 801 | init_sync_kiocb(&iocb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | iocb.private = &siocb; |
| 803 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); |
| 804 | if (-EIOCBQUEUED == ret) |
| 805 | ret = wait_on_sync_kiocb(&iocb); |
| 806 | return ret; |
| 807 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 808 | EXPORT_SYMBOL(sock_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 810 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
| 811 | size_t size, int flags) |
| 812 | { |
| 813 | struct kiocb iocb; |
| 814 | struct sock_iocb siocb; |
| 815 | int ret; |
| 816 | |
| 817 | init_sync_kiocb(&iocb, NULL); |
| 818 | iocb.private = &siocb; |
| 819 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); |
| 820 | if (-EIOCBQUEUED == ret) |
| 821 | ret = wait_on_sync_kiocb(&iocb); |
| 822 | return ret; |
| 823 | } |
| 824 | |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 825 | /** |
| 826 | * kernel_recvmsg - Receive a message from a socket (kernel space) |
| 827 | * @sock: The socket to receive the message from |
| 828 | * @msg: Received message |
| 829 | * @vec: Input s/g array for message data |
| 830 | * @num: Size of input s/g array |
| 831 | * @size: Number of bytes to read |
| 832 | * @flags: Message flags (MSG_DONTWAIT, etc...) |
| 833 | * |
| 834 | * On return the msg structure contains the scatter/gather array passed in the |
| 835 | * vec argument. The array is modified so that it consists of the unfilled |
| 836 | * portion of the original array. |
| 837 | * |
| 838 | * The returned value is the total number of bytes received, or an error. |
| 839 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 840 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 841 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | { |
| 843 | mm_segment_t oldfs = get_fs(); |
| 844 | int result; |
| 845 | |
| 846 | set_fs(KERNEL_DS); |
| 847 | /* |
| 848 | * the following is safe, since for compiler definitions of kvec and |
| 849 | * iovec are identical, yielding the same in-core layout and alignment |
| 850 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 851 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | result = sock_recvmsg(sock, msg, size, flags); |
| 853 | set_fs(oldfs); |
| 854 | return result; |
| 855 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 856 | EXPORT_SYMBOL(kernel_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 858 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 859 | int offset, size_t size, loff_t *ppos, int more) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | { |
| 861 | struct socket *sock; |
| 862 | int flags; |
| 863 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 864 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | |
Eric Dumazet | 35f9c09 | 2012-04-05 03:05:35 +0000 | [diff] [blame] | 866 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 867 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ |
| 868 | flags |= more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | |
Linus Torvalds | e694958 | 2009-08-13 08:28:36 -0700 | [diff] [blame] | 870 | return kernel_sendpage(sock, page, offset, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 871 | } |
| 872 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 873 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 874 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 875 | unsigned int flags) |
| 876 | { |
| 877 | struct socket *sock = file->private_data; |
| 878 | |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 879 | if (unlikely(!sock->ops->splice_read)) |
| 880 | return -EINVAL; |
| 881 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 882 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
| 883 | } |
| 884 | |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 885 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 886 | struct sock_iocb *siocb) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 887 | { |
Kent Overstreet | d29c445 | 2013-03-18 11:09:26 -0700 | [diff] [blame] | 888 | if (!is_sync_kiocb(iocb)) |
| 889 | BUG(); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 890 | |
| 891 | siocb->kiocb = iocb; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 892 | iocb->private = siocb; |
| 893 | return siocb; |
| 894 | } |
| 895 | |
| 896 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 897 | struct file *file, const struct iovec *iov, |
| 898 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 899 | { |
| 900 | struct socket *sock = file->private_data; |
| 901 | size_t size = 0; |
| 902 | int i; |
| 903 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 904 | for (i = 0; i < nr_segs; i++) |
| 905 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 906 | |
| 907 | msg->msg_name = NULL; |
| 908 | msg->msg_namelen = 0; |
| 909 | msg->msg_control = NULL; |
| 910 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 911 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 912 | msg->msg_iovlen = nr_segs; |
| 913 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 914 | |
| 915 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); |
| 916 | } |
| 917 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 918 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 919 | unsigned long nr_segs, loff_t pos) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 920 | { |
| 921 | struct sock_iocb siocb, *x; |
| 922 | |
| 923 | if (pos != 0) |
| 924 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 925 | |
Kent Overstreet | 73a7075 | 2013-05-09 15:03:42 -0700 | [diff] [blame] | 926 | if (iocb->ki_nbytes == 0) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 927 | return 0; |
| 928 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 929 | |
| 930 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 931 | if (!x) |
| 932 | return -ENOMEM; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 933 | 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] | 934 | } |
| 935 | |
| 936 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 937 | struct file *file, const struct iovec *iov, |
| 938 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 939 | { |
| 940 | struct socket *sock = file->private_data; |
| 941 | size_t size = 0; |
| 942 | int i; |
| 943 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 944 | for (i = 0; i < nr_segs; i++) |
| 945 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 946 | |
| 947 | msg->msg_name = NULL; |
| 948 | msg->msg_namelen = 0; |
| 949 | msg->msg_control = NULL; |
| 950 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 951 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 952 | msg->msg_iovlen = nr_segs; |
| 953 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 954 | if (sock->type == SOCK_SEQPACKET) |
| 955 | msg->msg_flags |= MSG_EOR; |
| 956 | |
| 957 | return __sock_sendmsg(iocb, sock, msg, size); |
| 958 | } |
| 959 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 960 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 961 | unsigned long nr_segs, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | { |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 963 | struct sock_iocb siocb, *x; |
| 964 | |
| 965 | if (pos != 0) |
| 966 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 967 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 968 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 969 | if (!x) |
| 970 | return -ENOMEM; |
| 971 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 972 | 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] | 973 | } |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | /* |
| 976 | * Atomic setting of ioctl hooks to avoid race |
| 977 | * with module unload. |
| 978 | */ |
| 979 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 980 | static DEFINE_MUTEX(br_ioctl_mutex); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 981 | 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] | 982 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 983 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 984 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 985 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 987 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | } |
| 989 | EXPORT_SYMBOL(brioctl_set); |
| 990 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 991 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 992 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 994 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 996 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 998 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 999 | } |
| 1000 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 1001 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1002 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1003 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1005 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1007 | mutex_lock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1008 | dlci_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1009 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | } |
| 1011 | EXPORT_SYMBOL(dlci_ioctl_set); |
| 1012 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1013 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
| 1014 | unsigned int cmd, unsigned long arg) |
| 1015 | { |
| 1016 | int err; |
| 1017 | void __user *argp = (void __user *)arg; |
| 1018 | |
| 1019 | err = sock->ops->ioctl(sock, cmd, arg); |
| 1020 | |
| 1021 | /* |
| 1022 | * If this ioctl is unknown try to hand it down |
| 1023 | * to the NIC driver. |
| 1024 | */ |
| 1025 | if (err == -ENOIOCTLCMD) |
| 1026 | err = dev_ioctl(net, cmd, argp); |
| 1027 | |
| 1028 | return err; |
| 1029 | } |
| 1030 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | /* |
| 1032 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 1033 | * what to do with it - that's up to the protocol still. |
| 1034 | */ |
| 1035 | |
| 1036 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 1037 | { |
| 1038 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1039 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | void __user *argp = (void __user *)arg; |
| 1041 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1042 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1044 | sock = file->private_data; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1045 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1046 | net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1048 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1050 | #ifdef CONFIG_WEXT_CORE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1052 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1054 | #endif |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1055 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | case FIOSETOWN: |
| 1057 | case SIOCSPGRP: |
| 1058 | err = -EFAULT; |
| 1059 | if (get_user(pid, (int __user *)argp)) |
| 1060 | break; |
| 1061 | err = f_setown(sock->file, pid, 1); |
| 1062 | break; |
| 1063 | case FIOGETOWN: |
| 1064 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 1065 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1066 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | break; |
| 1068 | case SIOCGIFBR: |
| 1069 | case SIOCSIFBR: |
| 1070 | case SIOCBRADDBR: |
| 1071 | case SIOCBRDELBR: |
| 1072 | err = -ENOPKG; |
| 1073 | if (!br_ioctl_hook) |
| 1074 | request_module("bridge"); |
| 1075 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1076 | mutex_lock(&br_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1077 | if (br_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1078 | err = br_ioctl_hook(net, cmd, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1079 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | break; |
| 1081 | case SIOCGIFVLAN: |
| 1082 | case SIOCSIFVLAN: |
| 1083 | err = -ENOPKG; |
| 1084 | if (!vlan_ioctl_hook) |
| 1085 | request_module("8021q"); |
| 1086 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1087 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1089 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1090 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | case SIOCADDDLCI: |
| 1093 | case SIOCDELDLCI: |
| 1094 | err = -ENOPKG; |
| 1095 | if (!dlci_ioctl_hook) |
| 1096 | request_module("dlci"); |
| 1097 | |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1098 | mutex_lock(&dlci_ioctl_mutex); |
| 1099 | if (dlci_ioctl_hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | err = dlci_ioctl_hook(cmd, argp); |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1101 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | break; |
| 1103 | default: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1104 | err = sock_do_ioctl(net, sock, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1105 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1106 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | return err; |
| 1108 | } |
| 1109 | |
| 1110 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 1111 | { |
| 1112 | int err; |
| 1113 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1115 | err = security_socket_create(family, type, protocol, 1); |
| 1116 | if (err) |
| 1117 | goto out; |
| 1118 | |
| 1119 | sock = sock_alloc(); |
| 1120 | if (!sock) { |
| 1121 | err = -ENOMEM; |
| 1122 | goto out; |
| 1123 | } |
| 1124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1126 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 1127 | if (err) |
| 1128 | goto out_release; |
| 1129 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | out: |
| 1131 | *res = sock; |
| 1132 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1133 | out_release: |
| 1134 | sock_release(sock); |
| 1135 | sock = NULL; |
| 1136 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1138 | EXPORT_SYMBOL(sock_create_lite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
| 1140 | /* No kernel lock held - perfect */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1141 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | { |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1143 | unsigned int busy_flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | struct socket *sock; |
| 1145 | |
| 1146 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1147 | * 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] | 1148 | */ |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1149 | sock = file->private_data; |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1150 | |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1151 | if (sk_can_busy_loop(sock->sk)) { |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1152 | /* this socket can poll_ll so tell the system call */ |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1153 | busy_flag = POLL_BUSY_LOOP; |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1154 | |
| 1155 | /* once, only if requested by syscall */ |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1156 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
| 1157 | sk_busy_loop(sock->sk, 1); |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1158 | } |
| 1159 | |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1160 | return busy_flag | sock->ops->poll(file, sock, wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | } |
| 1162 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1163 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1165 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | |
| 1167 | return sock->ops->mmap(file, sock, vma); |
| 1168 | } |
| 1169 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1170 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | sock_release(SOCKET_I(inode)); |
| 1173 | return 0; |
| 1174 | } |
| 1175 | |
| 1176 | /* |
| 1177 | * Update the socket async list |
| 1178 | * |
| 1179 | * Fasync_list locking strategy. |
| 1180 | * |
| 1181 | * 1. fasync_list is modified only under process context socket lock |
| 1182 | * i.e. under semaphore. |
| 1183 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1184 | * or under socket lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | */ |
| 1186 | |
| 1187 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1188 | { |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1189 | struct socket *sock = filp->private_data; |
| 1190 | struct sock *sk = sock->sk; |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1191 | struct socket_wq *wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1192 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1193 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | |
| 1196 | lock_sock(sk); |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1197 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
| 1198 | fasync_helper(fd, filp, on, &wq->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | |
Eric Dumazet | eaefd110 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1200 | if (!wq->fasync_list) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1201 | sock_reset_flag(sk, SOCK_FASYNC); |
Jonathan Corbet | 7639842 | 2009-02-01 14:26:59 -0700 | [diff] [blame] | 1202 | else |
Eric Dumazet | bcdce71 | 2009-10-06 17:28:29 -0700 | [diff] [blame] | 1203 | sock_set_flag(sk, SOCK_FASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1205 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | return 0; |
| 1207 | } |
| 1208 | |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1209 | /* 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] | 1210 | |
| 1211 | int sock_wake_async(struct socket *sock, int how, int band) |
| 1212 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1213 | struct socket_wq *wq; |
| 1214 | |
| 1215 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | return -1; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1217 | rcu_read_lock(); |
| 1218 | wq = rcu_dereference(sock->wq); |
| 1219 | if (!wq || !wq->fasync_list) { |
| 1220 | rcu_read_unlock(); |
| 1221 | return -1; |
| 1222 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1223 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1224 | case SOCK_WAKE_WAITD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
| 1226 | break; |
| 1227 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1228 | case SOCK_WAKE_SPACE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
| 1230 | break; |
| 1231 | /* fall through */ |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1232 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1233 | call_kill: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1234 | kill_fasync(&wq->fasync_list, SIGIO, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1236 | case SOCK_WAKE_URG: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1237 | kill_fasync(&wq->fasync_list, SIGURG, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | } |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1239 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | return 0; |
| 1241 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1242 | EXPORT_SYMBOL(sock_wake_async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1244 | int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1245 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | { |
| 1247 | int err; |
| 1248 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1249 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1250 | |
| 1251 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1252 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | */ |
| 1254 | if (family < 0 || family >= NPROTO) |
| 1255 | return -EAFNOSUPPORT; |
| 1256 | if (type < 0 || type >= SOCK_MAX) |
| 1257 | return -EINVAL; |
| 1258 | |
| 1259 | /* Compatibility. |
| 1260 | |
| 1261 | This uglymoron is moved from INET layer to here to avoid |
| 1262 | deadlock in module load. |
| 1263 | */ |
| 1264 | if (family == PF_INET && type == SOCK_PACKET) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1265 | static int warned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1266 | if (!warned) { |
| 1267 | warned = 1; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1268 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1269 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | } |
| 1271 | family = PF_PACKET; |
| 1272 | } |
| 1273 | |
| 1274 | err = security_socket_create(family, type, protocol, kern); |
| 1275 | if (err) |
| 1276 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1277 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1278 | /* |
| 1279 | * Allocate the socket and allow the family to set things up. if |
| 1280 | * the protocol is 0, the family is instructed to select an appropriate |
| 1281 | * default. |
| 1282 | */ |
| 1283 | sock = sock_alloc(); |
| 1284 | if (!sock) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1285 | net_warn_ratelimited("socket: no more sockets\n"); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1286 | return -ENFILE; /* Not exactly a match, but its the |
| 1287 | closest posix thing */ |
| 1288 | } |
| 1289 | |
| 1290 | sock->type = type; |
| 1291 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1292 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1293 | /* Attempt to load a protocol module if the find failed. |
| 1294 | * |
| 1295 | * 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] | 1296 | * requested real, full-featured networking support upon configuration. |
| 1297 | * Otherwise module support will break! |
| 1298 | */ |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 1299 | if (rcu_access_pointer(net_families[family]) == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1300 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | #endif |
| 1302 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1303 | rcu_read_lock(); |
| 1304 | pf = rcu_dereference(net_families[family]); |
| 1305 | err = -EAFNOSUPPORT; |
| 1306 | if (!pf) |
| 1307 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
| 1309 | /* |
| 1310 | * We will call the ->create function, that possibly is in a loadable |
| 1311 | * module, so we have to bump that loadable module refcnt first. |
| 1312 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1313 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | goto out_release; |
| 1315 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1316 | /* Now protected by module ref count */ |
| 1317 | rcu_read_unlock(); |
| 1318 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 1319 | err = pf->create(net, sock, protocol, kern); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1320 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | /* |
| 1324 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1325 | * socket at sock_release time we decrement its refcnt. |
| 1326 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1327 | if (!try_module_get(sock->ops->owner)) |
| 1328 | goto out_module_busy; |
| 1329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | /* |
| 1331 | * Now that we're done with the ->create function, the [loadable] |
| 1332 | * module can have its refcnt decremented |
| 1333 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1334 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1335 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1336 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1337 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1338 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1340 | return 0; |
| 1341 | |
| 1342 | out_module_busy: |
| 1343 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1345 | sock->ops = NULL; |
| 1346 | module_put(pf->owner); |
| 1347 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1349 | return err; |
| 1350 | |
| 1351 | out_release: |
| 1352 | rcu_read_unlock(); |
| 1353 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | } |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1355 | EXPORT_SYMBOL(__sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | |
| 1357 | int sock_create(int family, int type, int protocol, struct socket **res) |
| 1358 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1359 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1361 | EXPORT_SYMBOL(sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | |
| 1363 | int sock_create_kern(int family, int type, int protocol, struct socket **res) |
| 1364 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1365 | return __sock_create(&init_net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1366 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1367 | EXPORT_SYMBOL(sock_create_kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1369 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | { |
| 1371 | int retval; |
| 1372 | struct socket *sock; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1373 | int flags; |
| 1374 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1375 | /* Check the SOCK_* constants for consistency. */ |
| 1376 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1377 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1378 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1379 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1380 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1381 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1382 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1383 | return -EINVAL; |
| 1384 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1386 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1387 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | retval = sock_create(family, type, protocol, &sock); |
| 1390 | if (retval < 0) |
| 1391 | goto out; |
| 1392 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1393 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | if (retval < 0) |
| 1395 | goto out_release; |
| 1396 | |
| 1397 | out: |
| 1398 | /* It may be already another descriptor 8) Not kernel problem. */ |
| 1399 | return retval; |
| 1400 | |
| 1401 | out_release: |
| 1402 | sock_release(sock); |
| 1403 | return retval; |
| 1404 | } |
| 1405 | |
| 1406 | /* |
| 1407 | * Create a pair of connected sockets. |
| 1408 | */ |
| 1409 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1410 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
| 1411 | int __user *, usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | { |
| 1413 | struct socket *sock1, *sock2; |
| 1414 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1415 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1416 | int flags; |
| 1417 | |
| 1418 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1419 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1420 | return -EINVAL; |
| 1421 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1423 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1424 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | /* |
| 1427 | * Obtain the first socket and check if the underlying protocol |
| 1428 | * supports the socketpair call. |
| 1429 | */ |
| 1430 | |
| 1431 | err = sock_create(family, type, protocol, &sock1); |
| 1432 | if (err < 0) |
| 1433 | goto out; |
| 1434 | |
| 1435 | err = sock_create(family, type, protocol, &sock2); |
| 1436 | if (err < 0) |
| 1437 | goto out_release_1; |
| 1438 | |
| 1439 | err = sock1->ops->socketpair(sock1, sock2); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1440 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | goto out_release_both; |
| 1442 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1443 | fd1 = get_unused_fd_flags(flags); |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1444 | if (unlikely(fd1 < 0)) { |
| 1445 | err = fd1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | goto out_release_both; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1447 | } |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1448 | fd2 = get_unused_fd_flags(flags); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1449 | if (unlikely(fd2 < 0)) { |
| 1450 | err = fd2; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1451 | put_unused_fd(fd1); |
| 1452 | goto out_release_both; |
| 1453 | } |
| 1454 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1455 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1456 | if (unlikely(IS_ERR(newfile1))) { |
| 1457 | err = PTR_ERR(newfile1); |
| 1458 | put_unused_fd(fd1); |
| 1459 | put_unused_fd(fd2); |
| 1460 | goto out_release_both; |
| 1461 | } |
| 1462 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1463 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1464 | if (IS_ERR(newfile2)) { |
| 1465 | err = PTR_ERR(newfile2); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1466 | fput(newfile1); |
| 1467 | put_unused_fd(fd1); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1468 | put_unused_fd(fd2); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1469 | sock_release(sock2); |
| 1470 | goto out; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1471 | } |
| 1472 | |
Al Viro | 157cf64 | 2008-12-14 04:57:47 -0500 | [diff] [blame] | 1473 | audit_fd_pair(fd1, fd2); |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1474 | fd_install(fd1, newfile1); |
| 1475 | fd_install(fd2, newfile2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1476 | /* fd1 and fd2 may be already another descriptors. |
| 1477 | * Not kernel problem. |
| 1478 | */ |
| 1479 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1480 | err = put_user(fd1, &usockvec[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | if (!err) |
| 1482 | err = put_user(fd2, &usockvec[1]); |
| 1483 | if (!err) |
| 1484 | return 0; |
| 1485 | |
| 1486 | sys_close(fd2); |
| 1487 | sys_close(fd1); |
| 1488 | return err; |
| 1489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | out_release_both: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1491 | sock_release(sock2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | out_release_1: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1493 | sock_release(sock1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | out: |
| 1495 | return err; |
| 1496 | } |
| 1497 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | /* |
| 1499 | * Bind a name to a socket. Nothing much to do here since it's |
| 1500 | * the protocol's responsibility to handle the local address. |
| 1501 | * |
| 1502 | * We move the socket address to kernel space before we call |
| 1503 | * the protocol layer (having also checked the address is ok). |
| 1504 | */ |
| 1505 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1506 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | { |
| 1508 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1509 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1510 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1512 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1513 | if (sock) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1514 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1515 | if (err >= 0) { |
| 1516 | err = security_socket_bind(sock, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1517 | (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1518 | addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1519 | if (!err) |
| 1520 | err = sock->ops->bind(sock, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1521 | (struct sockaddr *) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1522 | &address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | } |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1524 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1525 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1526 | return err; |
| 1527 | } |
| 1528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | /* |
| 1530 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1531 | * necessary for a listen, and if that works, we mark the socket as |
| 1532 | * ready for listening. |
| 1533 | */ |
| 1534 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1535 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | { |
| 1537 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1538 | int err, fput_needed; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1539 | int somaxconn; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1540 | |
| 1541 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1542 | if (sock) { |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 1543 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1544 | if ((unsigned int)backlog > somaxconn) |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1545 | backlog = somaxconn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | |
| 1547 | err = security_socket_listen(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1548 | if (!err) |
| 1549 | err = sock->ops->listen(sock, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1551 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | } |
| 1553 | return err; |
| 1554 | } |
| 1555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | /* |
| 1557 | * For accept, we attempt to create a new socket, set up the link |
| 1558 | * with the client, wake up the client, then return the new |
| 1559 | * connected fd. We collect the address of the connector in kernel |
| 1560 | * space and move it to user at the very end. This is unclean because |
| 1561 | * we open the socket then return an error. |
| 1562 | * |
| 1563 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 1564 | * status to recvmsg. We need to add that support in a way thats |
| 1565 | * clean when we restucture accept also. |
| 1566 | */ |
| 1567 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1568 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1569 | int __user *, upeer_addrlen, int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | { |
| 1571 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1572 | struct file *newfile; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1573 | int err, len, newfd, fput_needed; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1574 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1576 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1577 | return -EINVAL; |
| 1578 | |
| 1579 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1580 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1581 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1582 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | if (!sock) |
| 1584 | goto out; |
| 1585 | |
| 1586 | err = -ENFILE; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1587 | newsock = sock_alloc(); |
| 1588 | if (!newsock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | goto out_put; |
| 1590 | |
| 1591 | newsock->type = sock->type; |
| 1592 | newsock->ops = sock->ops; |
| 1593 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | /* |
| 1595 | * We don't need try_module_get here, as the listening socket (sock) |
| 1596 | * has the protocol module (sock->ops->owner) held. |
| 1597 | */ |
| 1598 | __module_get(newsock->ops->owner); |
| 1599 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1600 | newfd = get_unused_fd_flags(flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1601 | if (unlikely(newfd < 0)) { |
| 1602 | err = newfd; |
David S. Miller | 9a1875e | 2006-04-01 12:48:36 -0800 | [diff] [blame] | 1603 | sock_release(newsock); |
| 1604 | goto out_put; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1605 | } |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1606 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1607 | if (unlikely(IS_ERR(newfile))) { |
| 1608 | err = PTR_ERR(newfile); |
| 1609 | put_unused_fd(newfd); |
| 1610 | sock_release(newsock); |
| 1611 | goto out_put; |
| 1612 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1613 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1614 | err = security_socket_accept(sock, newsock); |
| 1615 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1616 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1617 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
| 1619 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1620 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | |
| 1622 | if (upeer_sockaddr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1623 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1624 | &len, 2) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1626 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | } |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1628 | err = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1629 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1631 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | } |
| 1633 | |
| 1634 | /* File flags are not inherited via accept() unlike another OSes. */ |
| 1635 | |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1636 | fd_install(newfd, newfile); |
| 1637 | err = newfd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1640 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | out: |
| 1642 | return err; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1643 | out_fd: |
David S. Miller | 9606a21 | 2006-04-01 01:00:14 -0800 | [diff] [blame] | 1644 | fput(newfile); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1645 | put_unused_fd(newfd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | goto out_put; |
| 1647 | } |
| 1648 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1649 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1650 | int __user *, upeer_addrlen) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1651 | { |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 1652 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1653 | } |
| 1654 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | /* |
| 1656 | * Attempt to connect to a socket with the server address. The address |
| 1657 | * is in user space so we verify it is OK and move it to kernel space. |
| 1658 | * |
| 1659 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 1660 | * break bindings |
| 1661 | * |
| 1662 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 1663 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 1664 | * include the -EINPROGRESS status for such sockets. |
| 1665 | */ |
| 1666 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1667 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
| 1668 | int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | { |
| 1670 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1671 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1672 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1674 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | if (!sock) |
| 1676 | goto out; |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1677 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | if (err < 0) |
| 1679 | goto out_put; |
| 1680 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1681 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1682 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | if (err) |
| 1684 | goto out_put; |
| 1685 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1686 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | sock->file->f_flags); |
| 1688 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1689 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | out: |
| 1691 | return err; |
| 1692 | } |
| 1693 | |
| 1694 | /* |
| 1695 | * Get the local address ('name') of a socket object. Move the obtained |
| 1696 | * name to user space. |
| 1697 | */ |
| 1698 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1699 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
| 1700 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | { |
| 1702 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1703 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1704 | int len, err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1705 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1706 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | if (!sock) |
| 1708 | goto out; |
| 1709 | |
| 1710 | err = security_socket_getsockname(sock); |
| 1711 | if (err) |
| 1712 | goto out_put; |
| 1713 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1714 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | if (err) |
| 1716 | goto out_put; |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1717 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | |
| 1719 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1720 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | out: |
| 1722 | return err; |
| 1723 | } |
| 1724 | |
| 1725 | /* |
| 1726 | * Get the remote address ('name') of a socket object. Move the obtained |
| 1727 | * name to user space. |
| 1728 | */ |
| 1729 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1730 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
| 1731 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | { |
| 1733 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1734 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1735 | int len, err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1737 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1738 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | err = security_socket_getpeername(sock); |
| 1740 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1741 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | return err; |
| 1743 | } |
| 1744 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1745 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1746 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1747 | 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | if (!err) |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1749 | err = move_addr_to_user(&address, len, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1750 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1751 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | } |
| 1753 | return err; |
| 1754 | } |
| 1755 | |
| 1756 | /* |
| 1757 | * Send a datagram to a given address. We move the address into kernel |
| 1758 | * space and check the user space data area is readable before invoking |
| 1759 | * the protocol. |
| 1760 | */ |
| 1761 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1762 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1763 | unsigned int, flags, struct sockaddr __user *, addr, |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1764 | int, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | { |
| 1766 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1767 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1768 | int err; |
| 1769 | struct msghdr msg; |
| 1770 | struct iovec iov; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1771 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1772 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1773 | if (len > INT_MAX) |
| 1774 | len = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1775 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1776 | if (!sock) |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1777 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1778 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1779 | iov.iov_base = buff; |
| 1780 | iov.iov_len = len; |
| 1781 | msg.msg_name = NULL; |
| 1782 | msg.msg_iov = &iov; |
| 1783 | msg.msg_iovlen = 1; |
| 1784 | msg.msg_control = NULL; |
| 1785 | msg.msg_controllen = 0; |
| 1786 | msg.msg_namelen = 0; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1787 | if (addr) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1788 | err = move_addr_to_kernel(addr, addr_len, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | if (err < 0) |
| 1790 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1791 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1792 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | } |
| 1794 | if (sock->file->f_flags & O_NONBLOCK) |
| 1795 | flags |= MSG_DONTWAIT; |
| 1796 | msg.msg_flags = flags; |
| 1797 | err = sock_sendmsg(sock, &msg, len); |
| 1798 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1799 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1800 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1801 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | return err; |
| 1803 | } |
| 1804 | |
| 1805 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1806 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | */ |
| 1808 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1809 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1810 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1811 | { |
| 1812 | return sys_sendto(fd, buff, len, flags, NULL, 0); |
| 1813 | } |
| 1814 | |
| 1815 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1816 | * 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] | 1817 | * sender. We verify the buffers are writable and if needed move the |
| 1818 | * sender address from kernel to user space. |
| 1819 | */ |
| 1820 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1821 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1822 | unsigned int, flags, struct sockaddr __user *, addr, |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1823 | int __user *, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | { |
| 1825 | struct socket *sock; |
| 1826 | struct iovec iov; |
| 1827 | struct msghdr msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1828 | struct sockaddr_storage address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1829 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1830 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1831 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1832 | if (size > INT_MAX) |
| 1833 | size = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1834 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1835 | if (!sock) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1836 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1837 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1838 | msg.msg_control = NULL; |
| 1839 | msg.msg_controllen = 0; |
| 1840 | msg.msg_iovlen = 1; |
| 1841 | msg.msg_iov = &iov; |
| 1842 | iov.iov_len = size; |
| 1843 | iov.iov_base = ubuf; |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 1844 | /* Save some cycles and don't copy the address if not needed */ |
| 1845 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; |
| 1846 | /* We assume all kernel code knows the size of sockaddr_storage */ |
| 1847 | msg.msg_namelen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | if (sock->file->f_flags & O_NONBLOCK) |
| 1849 | flags |= MSG_DONTWAIT; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1850 | err = sock_recvmsg(sock, &msg, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1852 | if (err >= 0 && addr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1853 | err2 = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1854 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1855 | if (err2 < 0) |
| 1856 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1858 | |
| 1859 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1860 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | return err; |
| 1862 | } |
| 1863 | |
| 1864 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1865 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | */ |
| 1867 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1868 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1869 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | { |
| 1871 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
| 1872 | } |
| 1873 | |
| 1874 | /* |
| 1875 | * Set a socket option. Because we don't know the option lengths we have |
| 1876 | * to pass the user mode parameter for the protocols to sort out. |
| 1877 | */ |
| 1878 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1879 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| 1880 | char __user *, optval, int, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1882 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | struct socket *sock; |
| 1884 | |
| 1885 | if (optlen < 0) |
| 1886 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1887 | |
| 1888 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1889 | if (sock != NULL) { |
| 1890 | err = security_socket_setsockopt(sock, level, optname); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1891 | if (err) |
| 1892 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | |
| 1894 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1895 | err = |
| 1896 | sock_setsockopt(sock, level, optname, optval, |
| 1897 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1899 | err = |
| 1900 | sock->ops->setsockopt(sock, level, optname, optval, |
| 1901 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1902 | out_put: |
| 1903 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | } |
| 1905 | return err; |
| 1906 | } |
| 1907 | |
| 1908 | /* |
| 1909 | * Get a socket option. Because we don't know the option lengths we have |
| 1910 | * to pass a user mode parameter for the protocols to sort out. |
| 1911 | */ |
| 1912 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1913 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| 1914 | char __user *, optval, int __user *, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1916 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | struct socket *sock; |
| 1918 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1919 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1920 | if (sock != NULL) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1921 | err = security_socket_getsockopt(sock, level, optname); |
| 1922 | if (err) |
| 1923 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | |
| 1925 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1926 | err = |
| 1927 | sock_getsockopt(sock, level, optname, optval, |
| 1928 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1930 | err = |
| 1931 | sock->ops->getsockopt(sock, level, optname, optval, |
| 1932 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1933 | out_put: |
| 1934 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1935 | } |
| 1936 | return err; |
| 1937 | } |
| 1938 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | /* |
| 1940 | * Shutdown a socket. |
| 1941 | */ |
| 1942 | |
Heiko Carstens | 754fe8d | 2009-01-14 14:14:09 +0100 | [diff] [blame] | 1943 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1945 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | struct socket *sock; |
| 1947 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1948 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1949 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | err = security_socket_shutdown(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1951 | if (!err) |
| 1952 | err = sock->ops->shutdown(sock, how); |
| 1953 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1954 | } |
| 1955 | return err; |
| 1956 | } |
| 1957 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1958 | /* 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] | 1959 | * fields which are the same type (int / unsigned) on our platforms. |
| 1960 | */ |
| 1961 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 1962 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 1963 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 1964 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1965 | struct used_address { |
| 1966 | struct sockaddr_storage name; |
| 1967 | unsigned int name_len; |
| 1968 | }; |
| 1969 | |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 1970 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
| 1971 | struct msghdr __user *umsg) |
| 1972 | { |
| 1973 | if (copy_from_user(kmsg, umsg, sizeof(struct msghdr))) |
| 1974 | return -EFAULT; |
| 1975 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
Dan Carpenter | db31c55 | 2013-11-27 15:40:21 +0300 | [diff] [blame^] | 1976 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 1977 | return 0; |
| 1978 | } |
| 1979 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 1980 | static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1981 | struct msghdr *msg_sys, unsigned int flags, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1982 | struct used_address *used_address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1984 | struct compat_msghdr __user *msg_compat = |
| 1985 | (struct compat_msghdr __user *)msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1986 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 1988 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1989 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
| 1990 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | unsigned char *ctl_buf = ctl; |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 1992 | int err, ctl_len, total_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | err = -EFAULT; |
| 1995 | if (MSG_CMSG_COMPAT & flags) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1996 | if (get_compat_msghdr(msg_sys, msg_compat)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | return -EFAULT; |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 1998 | } else { |
| 1999 | err = copy_msghdr_from_user(msg_sys, msg); |
| 2000 | if (err) |
| 2001 | return err; |
| 2002 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2004 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2005 | err = -EMSGSIZE; |
| 2006 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
| 2007 | goto out; |
| 2008 | err = -ENOMEM; |
| 2009 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), |
| 2010 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | if (!iov) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2012 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | } |
| 2014 | |
| 2015 | /* This will also move the address data into kernel space */ |
| 2016 | if (MSG_CMSG_COMPAT & flags) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2017 | err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2018 | } else |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2019 | err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2020 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | goto out_freeiov; |
| 2022 | total_len = err; |
| 2023 | |
| 2024 | err = -ENOBUFS; |
| 2025 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2026 | if (msg_sys->msg_controllen > INT_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2028 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2030 | err = |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2031 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2032 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2033 | if (err) |
| 2034 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2035 | ctl_buf = msg_sys->msg_control; |
| 2036 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | } else if (ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2038 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2039 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2040 | if (ctl_buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | goto out_freeiov; |
| 2042 | } |
| 2043 | err = -EFAULT; |
| 2044 | /* |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2045 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
| 2047 | * checking falls down on this. |
| 2048 | */ |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 2049 | if (copy_from_user(ctl_buf, |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2050 | (void __user __force *)msg_sys->msg_control, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2051 | ctl_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | goto out_freectl; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2053 | msg_sys->msg_control = ctl_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | } |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2055 | msg_sys->msg_flags = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | |
| 2057 | if (sock->file->f_flags & O_NONBLOCK) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2058 | msg_sys->msg_flags |= MSG_DONTWAIT; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2059 | /* |
| 2060 | * If this is sendmmsg() and current destination address is same as |
| 2061 | * previously succeeded address, omit asking LSM's decision. |
| 2062 | * used_address->name_len is initialized to UINT_MAX so that the first |
| 2063 | * destination address never matches. |
| 2064 | */ |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2065 | if (used_address && msg_sys->msg_name && |
| 2066 | used_address->name_len == msg_sys->msg_namelen && |
| 2067 | !memcmp(&used_address->name, msg_sys->msg_name, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2068 | used_address->name_len)) { |
| 2069 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); |
| 2070 | goto out_freectl; |
| 2071 | } |
| 2072 | err = sock_sendmsg(sock, msg_sys, total_len); |
| 2073 | /* |
| 2074 | * If this is sendmmsg() and sending to current destination address was |
| 2075 | * successful, remember it. |
| 2076 | */ |
| 2077 | if (used_address && err >= 0) { |
| 2078 | used_address->name_len = msg_sys->msg_namelen; |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2079 | if (msg_sys->msg_name) |
| 2080 | memcpy(&used_address->name, msg_sys->msg_name, |
| 2081 | used_address->name_len); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2082 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | |
| 2084 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2085 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
| 2087 | out_freeiov: |
| 2088 | if (iov != iovstack) |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2089 | kfree(iov); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2090 | out: |
| 2091 | return err; |
| 2092 | } |
| 2093 | |
| 2094 | /* |
| 2095 | * BSD sendmsg interface |
| 2096 | */ |
| 2097 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2098 | long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2099 | { |
| 2100 | int fput_needed, err; |
| 2101 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2102 | struct socket *sock; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2103 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2104 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2105 | if (!sock) |
| 2106 | goto out; |
| 2107 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2108 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2109 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2110 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2111 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2112 | return err; |
| 2113 | } |
| 2114 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2115 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) |
| 2116 | { |
| 2117 | if (flags & MSG_CMSG_COMPAT) |
| 2118 | return -EINVAL; |
| 2119 | return __sys_sendmsg(fd, msg, flags); |
| 2120 | } |
| 2121 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2122 | /* |
| 2123 | * Linux sendmmsg interface |
| 2124 | */ |
| 2125 | |
| 2126 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2127 | unsigned int flags) |
| 2128 | { |
| 2129 | int fput_needed, err, datagrams; |
| 2130 | struct socket *sock; |
| 2131 | struct mmsghdr __user *entry; |
| 2132 | struct compat_mmsghdr __user *compat_entry; |
| 2133 | struct msghdr msg_sys; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2134 | struct used_address used_address; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2135 | |
Anton Blanchard | 98382f4 | 2011-08-04 14:07:39 +0000 | [diff] [blame] | 2136 | if (vlen > UIO_MAXIOV) |
| 2137 | vlen = UIO_MAXIOV; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2138 | |
| 2139 | datagrams = 0; |
| 2140 | |
| 2141 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2142 | if (!sock) |
| 2143 | return err; |
| 2144 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2145 | used_address.name_len = UINT_MAX; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2146 | entry = mmsg; |
| 2147 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2148 | err = 0; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2149 | |
| 2150 | while (datagrams < vlen) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2151 | if (MSG_CMSG_COMPAT & flags) { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2152 | err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, |
| 2153 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2154 | if (err < 0) |
| 2155 | break; |
| 2156 | err = __put_user(err, &compat_entry->msg_len); |
| 2157 | ++compat_entry; |
| 2158 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2159 | err = ___sys_sendmsg(sock, |
| 2160 | (struct msghdr __user *)entry, |
| 2161 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2162 | if (err < 0) |
| 2163 | break; |
| 2164 | err = put_user(err, &entry->msg_len); |
| 2165 | ++entry; |
| 2166 | } |
| 2167 | |
| 2168 | if (err) |
| 2169 | break; |
| 2170 | ++datagrams; |
| 2171 | } |
| 2172 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2173 | fput_light(sock->file, fput_needed); |
| 2174 | |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2175 | /* We only return an error if no datagrams were able to be sent */ |
| 2176 | if (datagrams != 0) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2177 | return datagrams; |
| 2178 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2179 | return err; |
| 2180 | } |
| 2181 | |
| 2182 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2183 | unsigned int, vlen, unsigned int, flags) |
| 2184 | { |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2185 | if (flags & MSG_CMSG_COMPAT) |
| 2186 | return -EINVAL; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2187 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
| 2188 | } |
| 2189 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2190 | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2191 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2193 | struct compat_msghdr __user *msg_compat = |
| 2194 | (struct compat_msghdr __user *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2195 | struct iovec iovstack[UIO_FASTIOV]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2196 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | unsigned long cmsg_ptr; |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2198 | int err, total_len, len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | |
| 2200 | /* kernel mode address */ |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2201 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2202 | |
| 2203 | /* user mode address pointers */ |
| 2204 | struct sockaddr __user *uaddr; |
| 2205 | int __user *uaddr_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2206 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | if (MSG_CMSG_COMPAT & flags) { |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2208 | if (get_compat_msghdr(msg_sys, msg_compat)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2209 | return -EFAULT; |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2210 | } else { |
| 2211 | err = copy_msghdr_from_user(msg_sys, msg); |
| 2212 | if (err) |
| 2213 | return err; |
| 2214 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2216 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2217 | err = -EMSGSIZE; |
| 2218 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
| 2219 | goto out; |
| 2220 | err = -ENOMEM; |
| 2221 | iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), |
| 2222 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2223 | if (!iov) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2224 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | } |
| 2226 | |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2227 | /* Save the user-mode address (verify_iovec will change the |
| 2228 | * kernel msghdr to use the kernel address space) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | */ |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2230 | uaddr = (__force void __user *)msg_sys->msg_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2231 | uaddr_len = COMPAT_NAMELEN(msg); |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2232 | if (MSG_CMSG_COMPAT & flags) |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2233 | err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2234 | else |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2235 | err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | if (err < 0) |
| 2237 | goto out_freeiov; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2238 | total_len = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2239 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2240 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
| 2241 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2242 | |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2243 | /* We assume all kernel code knows the size of sockaddr_storage */ |
| 2244 | msg_sys->msg_namelen = 0; |
| 2245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | if (sock->file->f_flags & O_NONBLOCK) |
| 2247 | flags |= MSG_DONTWAIT; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2248 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
| 2249 | total_len, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2250 | if (err < 0) |
| 2251 | goto out_freeiov; |
| 2252 | len = err; |
| 2253 | |
| 2254 | if (uaddr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2255 | err = move_addr_to_user(&addr, |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2256 | msg_sys->msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2257 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | if (err < 0) |
| 2259 | goto out_freeiov; |
| 2260 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2261 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2262 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2263 | if (err) |
| 2264 | goto out_freeiov; |
| 2265 | if (MSG_CMSG_COMPAT & flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2266 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2267 | &msg_compat->msg_controllen); |
| 2268 | else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2269 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2270 | &msg->msg_controllen); |
| 2271 | if (err) |
| 2272 | goto out_freeiov; |
| 2273 | err = len; |
| 2274 | |
| 2275 | out_freeiov: |
| 2276 | if (iov != iovstack) |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2277 | kfree(iov); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2278 | out: |
| 2279 | return err; |
| 2280 | } |
| 2281 | |
| 2282 | /* |
| 2283 | * BSD recvmsg interface |
| 2284 | */ |
| 2285 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2286 | long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2287 | { |
| 2288 | int fput_needed, err; |
| 2289 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2290 | struct socket *sock; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2291 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2292 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2293 | if (!sock) |
| 2294 | goto out; |
| 2295 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2296 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2297 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2298 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2299 | out: |
| 2300 | return err; |
| 2301 | } |
| 2302 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2303 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, |
| 2304 | unsigned int, flags) |
| 2305 | { |
| 2306 | if (flags & MSG_CMSG_COMPAT) |
| 2307 | return -EINVAL; |
| 2308 | return __sys_recvmsg(fd, msg, flags); |
| 2309 | } |
| 2310 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2311 | /* |
| 2312 | * Linux recvmmsg interface |
| 2313 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2315 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2316 | unsigned int flags, struct timespec *timeout) |
| 2317 | { |
| 2318 | int fput_needed, err, datagrams; |
| 2319 | struct socket *sock; |
| 2320 | struct mmsghdr __user *entry; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2321 | struct compat_mmsghdr __user *compat_entry; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2322 | struct msghdr msg_sys; |
| 2323 | struct timespec end_time; |
| 2324 | |
| 2325 | if (timeout && |
| 2326 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
| 2327 | timeout->tv_nsec)) |
| 2328 | return -EINVAL; |
| 2329 | |
| 2330 | datagrams = 0; |
| 2331 | |
| 2332 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2333 | if (!sock) |
| 2334 | return err; |
| 2335 | |
| 2336 | err = sock_error(sock->sk); |
| 2337 | if (err) |
| 2338 | goto out_put; |
| 2339 | |
| 2340 | entry = mmsg; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2341 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2342 | |
| 2343 | while (datagrams < vlen) { |
| 2344 | /* |
| 2345 | * No need to ask LSM for more than the first datagram. |
| 2346 | */ |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2347 | if (MSG_CMSG_COMPAT & flags) { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2348 | err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, |
| 2349 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2350 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2351 | if (err < 0) |
| 2352 | break; |
| 2353 | err = __put_user(err, &compat_entry->msg_len); |
| 2354 | ++compat_entry; |
| 2355 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2356 | err = ___sys_recvmsg(sock, |
| 2357 | (struct msghdr __user *)entry, |
| 2358 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2359 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2360 | if (err < 0) |
| 2361 | break; |
| 2362 | err = put_user(err, &entry->msg_len); |
| 2363 | ++entry; |
| 2364 | } |
| 2365 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2366 | if (err) |
| 2367 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2368 | ++datagrams; |
| 2369 | |
Brandon L Black | 71c5c159 | 2010-03-26 16:18:03 +0000 | [diff] [blame] | 2370 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
| 2371 | if (flags & MSG_WAITFORONE) |
| 2372 | flags |= MSG_DONTWAIT; |
| 2373 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2374 | if (timeout) { |
| 2375 | ktime_get_ts(timeout); |
| 2376 | *timeout = timespec_sub(end_time, *timeout); |
| 2377 | if (timeout->tv_sec < 0) { |
| 2378 | timeout->tv_sec = timeout->tv_nsec = 0; |
| 2379 | break; |
| 2380 | } |
| 2381 | |
| 2382 | /* Timeout, return less than vlen datagrams */ |
| 2383 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
| 2384 | break; |
| 2385 | } |
| 2386 | |
| 2387 | /* Out of band data, return right away */ |
| 2388 | if (msg_sys.msg_flags & MSG_OOB) |
| 2389 | break; |
| 2390 | } |
| 2391 | |
| 2392 | out_put: |
| 2393 | fput_light(sock->file, fput_needed); |
| 2394 | |
| 2395 | if (err == 0) |
| 2396 | return datagrams; |
| 2397 | |
| 2398 | if (datagrams != 0) { |
| 2399 | /* |
| 2400 | * We may return less entries than requested (vlen) if the |
| 2401 | * sock is non block and there aren't enough datagrams... |
| 2402 | */ |
| 2403 | if (err != -EAGAIN) { |
| 2404 | /* |
| 2405 | * ... or if recvmsg returns an error after we |
| 2406 | * received some datagrams, where we record the |
| 2407 | * error to return on the next call or if the |
| 2408 | * app asks about it using getsockopt(SO_ERROR). |
| 2409 | */ |
| 2410 | sock->sk->sk_err = -err; |
| 2411 | } |
| 2412 | |
| 2413 | return datagrams; |
| 2414 | } |
| 2415 | |
| 2416 | return err; |
| 2417 | } |
| 2418 | |
| 2419 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2420 | unsigned int, vlen, unsigned int, flags, |
| 2421 | struct timespec __user *, timeout) |
| 2422 | { |
| 2423 | int datagrams; |
| 2424 | struct timespec timeout_sys; |
| 2425 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2426 | if (flags & MSG_CMSG_COMPAT) |
| 2427 | return -EINVAL; |
| 2428 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2429 | if (!timeout) |
| 2430 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); |
| 2431 | |
| 2432 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) |
| 2433 | return -EFAULT; |
| 2434 | |
| 2435 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
| 2436 | |
| 2437 | if (datagrams > 0 && |
| 2438 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) |
| 2439 | datagrams = -EFAULT; |
| 2440 | |
| 2441 | return datagrams; |
| 2442 | } |
| 2443 | |
| 2444 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | /* Argument list sizes for sys_socketcall */ |
| 2446 | #define AL(x) ((x) * sizeof(unsigned long)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2447 | static const unsigned char nargs[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2448 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 2449 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 2450 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2451 | AL(4), AL(5), AL(4) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2452 | }; |
| 2453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2454 | #undef AL |
| 2455 | |
| 2456 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2457 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2458 | * |
| 2459 | * Argument checking cleaned up. Saved 20% in size. |
| 2460 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2461 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2462 | */ |
| 2463 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 2464 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | { |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 2466 | unsigned long a[AUDITSC_ARGS]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2467 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | int err; |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2469 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2471 | if (call < 1 || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2472 | return -EINVAL; |
| 2473 | |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2474 | len = nargs[call]; |
| 2475 | if (len > sizeof(a)) |
| 2476 | return -EINVAL; |
| 2477 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2478 | /* copy_from_user should be SMP safe. */ |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2479 | if (copy_from_user(a, args, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2480 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2481 | |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 2482 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
| 2483 | if (err) |
| 2484 | return err; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2485 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2486 | a0 = a[0]; |
| 2487 | a1 = a[1]; |
| 2488 | |
| 2489 | switch (call) { |
| 2490 | case SYS_SOCKET: |
| 2491 | err = sys_socket(a0, a1, a[2]); |
| 2492 | break; |
| 2493 | case SYS_BIND: |
| 2494 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
| 2495 | break; |
| 2496 | case SYS_CONNECT: |
| 2497 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
| 2498 | break; |
| 2499 | case SYS_LISTEN: |
| 2500 | err = sys_listen(a0, a1); |
| 2501 | break; |
| 2502 | case SYS_ACCEPT: |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2503 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2504 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2505 | break; |
| 2506 | case SYS_GETSOCKNAME: |
| 2507 | err = |
| 2508 | sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 2509 | (int __user *)a[2]); |
| 2510 | break; |
| 2511 | case SYS_GETPEERNAME: |
| 2512 | err = |
| 2513 | sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 2514 | (int __user *)a[2]); |
| 2515 | break; |
| 2516 | case SYS_SOCKETPAIR: |
| 2517 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
| 2518 | break; |
| 2519 | case SYS_SEND: |
| 2520 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); |
| 2521 | break; |
| 2522 | case SYS_SENDTO: |
| 2523 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 2524 | (struct sockaddr __user *)a[4], a[5]); |
| 2525 | break; |
| 2526 | case SYS_RECV: |
| 2527 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); |
| 2528 | break; |
| 2529 | case SYS_RECVFROM: |
| 2530 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 2531 | (struct sockaddr __user *)a[4], |
| 2532 | (int __user *)a[5]); |
| 2533 | break; |
| 2534 | case SYS_SHUTDOWN: |
| 2535 | err = sys_shutdown(a0, a1); |
| 2536 | break; |
| 2537 | case SYS_SETSOCKOPT: |
| 2538 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
| 2539 | break; |
| 2540 | case SYS_GETSOCKOPT: |
| 2541 | err = |
| 2542 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 2543 | (int __user *)a[4]); |
| 2544 | break; |
| 2545 | case SYS_SENDMSG: |
| 2546 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2547 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2548 | case SYS_SENDMMSG: |
| 2549 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); |
| 2550 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2551 | case SYS_RECVMSG: |
| 2552 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2553 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2554 | case SYS_RECVMMSG: |
| 2555 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], |
| 2556 | (struct timespec __user *)a[4]); |
| 2557 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2558 | case SYS_ACCEPT4: |
| 2559 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2560 | (int __user *)a[2], a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2561 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2562 | default: |
| 2563 | err = -EINVAL; |
| 2564 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2565 | } |
| 2566 | return err; |
| 2567 | } |
| 2568 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2569 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2571 | /** |
| 2572 | * sock_register - add a socket protocol handler |
| 2573 | * @ops: description of protocol |
| 2574 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2575 | * This function is called by a protocol handler that wants to |
| 2576 | * advertise its address family, and have it linked into the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2577 | * socket interface. The value ops->family coresponds to the |
| 2578 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2580 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2581 | { |
| 2582 | int err; |
| 2583 | |
| 2584 | if (ops->family >= NPROTO) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2585 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
| 2586 | NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | return -ENOBUFS; |
| 2588 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2589 | |
| 2590 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 2591 | if (rcu_dereference_protected(net_families[ops->family], |
| 2592 | lockdep_is_held(&net_family_lock))) |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2593 | err = -EEXIST; |
| 2594 | else { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 2595 | rcu_assign_pointer(net_families[ops->family], ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2596 | err = 0; |
| 2597 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2598 | spin_unlock(&net_family_lock); |
| 2599 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2600 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | return err; |
| 2602 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2603 | EXPORT_SYMBOL(sock_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2604 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2605 | /** |
| 2606 | * sock_unregister - remove a protocol handler |
| 2607 | * @family: protocol family to remove |
| 2608 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | * This function is called by a protocol handler that wants to |
| 2610 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2611 | * new socket creation. |
| 2612 | * |
| 2613 | * If protocol handler is a module, then it can use module reference |
| 2614 | * counts to protect against new references. If protocol handler is not |
| 2615 | * a module then it needs to provide its own protection in |
| 2616 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2618 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2620 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2621 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2622 | spin_lock(&net_family_lock); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 2623 | RCU_INIT_POINTER(net_families[family], NULL); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2624 | spin_unlock(&net_family_lock); |
| 2625 | |
| 2626 | synchronize_rcu(); |
| 2627 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2628 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2629 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2630 | EXPORT_SYMBOL(sock_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2631 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2632 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2633 | { |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2634 | int err; |
Eric W. Biederman | 2ca794e | 2012-04-19 13:20:32 +0000 | [diff] [blame] | 2635 | /* |
| 2636 | * Initialize the network sysctl infrastructure. |
| 2637 | */ |
| 2638 | err = net_sysctl_init(); |
| 2639 | if (err) |
| 2640 | goto out; |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2641 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2642 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2643 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | */ |
| 2645 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2646 | |
| 2647 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2648 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2649 | */ |
| 2650 | |
| 2651 | init_inodecache(); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2652 | |
| 2653 | err = register_filesystem(&sock_fs_type); |
| 2654 | if (err) |
| 2655 | goto out_fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2656 | sock_mnt = kern_mount(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2657 | if (IS_ERR(sock_mnt)) { |
| 2658 | err = PTR_ERR(sock_mnt); |
| 2659 | goto out_mount; |
| 2660 | } |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2661 | |
| 2662 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | */ |
| 2664 | |
| 2665 | #ifdef CONFIG_NETFILTER |
Pablo Neira Ayuso | 6d11cfd | 2013-05-22 22:42:36 +0000 | [diff] [blame] | 2666 | err = netfilter_init(); |
| 2667 | if (err) |
| 2668 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2669 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 2670 | |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 2671 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
| 2672 | skb_timestamping_init(); |
| 2673 | #endif |
| 2674 | |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2675 | out: |
| 2676 | return err; |
| 2677 | |
| 2678 | out_mount: |
| 2679 | unregister_filesystem(&sock_fs_type); |
| 2680 | out_fs: |
| 2681 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | } |
| 2683 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2684 | core_initcall(sock_init); /* early initcall */ |
| 2685 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2686 | #ifdef CONFIG_PROC_FS |
| 2687 | void socket_seq_show(struct seq_file *seq) |
| 2688 | { |
| 2689 | int cpu; |
| 2690 | int counter = 0; |
| 2691 | |
KAMEZAWA Hiroyuki | 6f91204 | 2006-04-10 22:52:50 -0700 | [diff] [blame] | 2692 | for_each_possible_cpu(cpu) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2693 | counter += per_cpu(sockets_in_use, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2694 | |
| 2695 | /* It can be negative, by the way. 8) */ |
| 2696 | if (counter < 0) |
| 2697 | counter = 0; |
| 2698 | |
| 2699 | seq_printf(seq, "sockets: used %d\n", counter); |
| 2700 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2701 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2702 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2703 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2704 | static int do_siocgstamp(struct net *net, struct socket *sock, |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2705 | unsigned int cmd, void __user *up) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2706 | { |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2707 | mm_segment_t old_fs = get_fs(); |
| 2708 | struct timeval ktv; |
| 2709 | int err; |
| 2710 | |
| 2711 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2712 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2713 | set_fs(old_fs); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2714 | if (!err) |
Mikulas Patocka | ed6fe9d | 2012-09-01 12:34:07 -0400 | [diff] [blame] | 2715 | err = compat_put_timeval(&ktv, up); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2716 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2717 | return err; |
| 2718 | } |
| 2719 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2720 | static int do_siocgstampns(struct net *net, struct socket *sock, |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2721 | unsigned int cmd, void __user *up) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2722 | { |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2723 | mm_segment_t old_fs = get_fs(); |
| 2724 | struct timespec kts; |
| 2725 | int err; |
| 2726 | |
| 2727 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2728 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2729 | set_fs(old_fs); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2730 | if (!err) |
Mikulas Patocka | ed6fe9d | 2012-09-01 12:34:07 -0400 | [diff] [blame] | 2731 | err = compat_put_timespec(&kts, up); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2732 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2733 | return err; |
| 2734 | } |
| 2735 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2736 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2737 | { |
| 2738 | struct ifreq __user *uifr; |
| 2739 | int err; |
| 2740 | |
| 2741 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2742 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2743 | return -EFAULT; |
| 2744 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2745 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2746 | if (err) |
| 2747 | return err; |
| 2748 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2749 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2750 | return -EFAULT; |
| 2751 | |
| 2752 | return 0; |
| 2753 | } |
| 2754 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2755 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2756 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2757 | struct compat_ifconf ifc32; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2758 | struct ifconf ifc; |
| 2759 | struct ifconf __user *uifc; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2760 | struct compat_ifreq __user *ifr32; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2761 | struct ifreq __user *ifr; |
| 2762 | unsigned int i, j; |
| 2763 | int err; |
| 2764 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2765 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2766 | return -EFAULT; |
| 2767 | |
Mathias Krause | 43da5f2 | 2012-08-15 11:31:57 +0000 | [diff] [blame] | 2768 | memset(&ifc, 0, sizeof(ifc)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2769 | if (ifc32.ifcbuf == 0) { |
| 2770 | ifc32.ifc_len = 0; |
| 2771 | ifc.ifc_len = 0; |
| 2772 | ifc.ifc_req = NULL; |
| 2773 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); |
| 2774 | } else { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2775 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
| 2776 | sizeof(struct ifreq); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2777 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
| 2778 | ifc.ifc_len = len; |
| 2779 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); |
| 2780 | ifr32 = compat_ptr(ifc32.ifcbuf); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2781 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2782 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2783 | return -EFAULT; |
| 2784 | ifr++; |
| 2785 | ifr32++; |
| 2786 | } |
| 2787 | } |
| 2788 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) |
| 2789 | return -EFAULT; |
| 2790 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2791 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2792 | if (err) |
| 2793 | return err; |
| 2794 | |
| 2795 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) |
| 2796 | return -EFAULT; |
| 2797 | |
| 2798 | ifr = ifc.ifc_req; |
| 2799 | ifr32 = compat_ptr(ifc32.ifcbuf); |
| 2800 | for (i = 0, j = 0; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2801 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
| 2802 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { |
| 2803 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2804 | return -EFAULT; |
| 2805 | ifr32++; |
| 2806 | ifr++; |
| 2807 | } |
| 2808 | |
| 2809 | if (ifc32.ifcbuf == 0) { |
| 2810 | /* Translate from 64-bit structure multiple to |
| 2811 | * a 32-bit one. |
| 2812 | */ |
| 2813 | i = ifc.ifc_len; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2814 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2815 | ifc32.ifc_len = i; |
| 2816 | } else { |
| 2817 | ifc32.ifc_len = i; |
| 2818 | } |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2819 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2820 | return -EFAULT; |
| 2821 | |
| 2822 | return 0; |
| 2823 | } |
| 2824 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2825 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2826 | { |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2827 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
| 2828 | bool convert_in = false, convert_out = false; |
| 2829 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); |
| 2830 | struct ethtool_rxnfc __user *rxnfc; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2831 | struct ifreq __user *ifr; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2832 | u32 rule_cnt = 0, actual_rule_cnt; |
| 2833 | u32 ethcmd; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2834 | u32 data; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2835 | int ret; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2836 | |
| 2837 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2838 | return -EFAULT; |
| 2839 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2840 | compat_rxnfc = compat_ptr(data); |
| 2841 | |
| 2842 | if (get_user(ethcmd, &compat_rxnfc->cmd)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2843 | return -EFAULT; |
| 2844 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2845 | /* Most ethtool structures are defined without padding. |
| 2846 | * Unfortunately struct ethtool_rxnfc is an exception. |
| 2847 | */ |
| 2848 | switch (ethcmd) { |
| 2849 | default: |
| 2850 | break; |
| 2851 | case ETHTOOL_GRXCLSRLALL: |
| 2852 | /* Buffer size is variable */ |
| 2853 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) |
| 2854 | return -EFAULT; |
| 2855 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) |
| 2856 | return -ENOMEM; |
| 2857 | buf_size += rule_cnt * sizeof(u32); |
| 2858 | /* fall through */ |
| 2859 | case ETHTOOL_GRXRINGS: |
| 2860 | case ETHTOOL_GRXCLSRLCNT: |
| 2861 | case ETHTOOL_GRXCLSRULE: |
Ben Hutchings | 55664f3 | 2012-01-03 12:04:51 +0000 | [diff] [blame] | 2862 | case ETHTOOL_SRXCLSRLINS: |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2863 | convert_out = true; |
| 2864 | /* fall through */ |
| 2865 | case ETHTOOL_SRXCLSRLDEL: |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2866 | buf_size += sizeof(struct ethtool_rxnfc); |
| 2867 | convert_in = true; |
| 2868 | break; |
| 2869 | } |
| 2870 | |
| 2871 | ifr = compat_alloc_user_space(buf_size); |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2872 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2873 | |
| 2874 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2875 | return -EFAULT; |
| 2876 | |
| 2877 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
| 2878 | &ifr->ifr_ifru.ifru_data)) |
| 2879 | return -EFAULT; |
| 2880 | |
| 2881 | if (convert_in) { |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2882 | /* We expect there to be holes between fs.m_ext and |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2883 | * fs.ring_cookie and at the end of fs, but nowhere else. |
| 2884 | */ |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2885 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
| 2886 | sizeof(compat_rxnfc->fs.m_ext) != |
| 2887 | offsetof(struct ethtool_rxnfc, fs.m_ext) + |
| 2888 | sizeof(rxnfc->fs.m_ext)); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2889 | BUILD_BUG_ON( |
| 2890 | offsetof(struct compat_ethtool_rxnfc, fs.location) - |
| 2891 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != |
| 2892 | offsetof(struct ethtool_rxnfc, fs.location) - |
| 2893 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); |
| 2894 | |
| 2895 | if (copy_in_user(rxnfc, compat_rxnfc, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2896 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
| 2897 | (void __user *)rxnfc) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2898 | copy_in_user(&rxnfc->fs.ring_cookie, |
| 2899 | &compat_rxnfc->fs.ring_cookie, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2900 | (void __user *)(&rxnfc->fs.location + 1) - |
| 2901 | (void __user *)&rxnfc->fs.ring_cookie) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2902 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
| 2903 | sizeof(rxnfc->rule_cnt))) |
| 2904 | return -EFAULT; |
| 2905 | } |
| 2906 | |
| 2907 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); |
| 2908 | if (ret) |
| 2909 | return ret; |
| 2910 | |
| 2911 | if (convert_out) { |
| 2912 | if (copy_in_user(compat_rxnfc, rxnfc, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2913 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
| 2914 | (const void __user *)rxnfc) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2915 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
| 2916 | &rxnfc->fs.ring_cookie, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2917 | (const void __user *)(&rxnfc->fs.location + 1) - |
| 2918 | (const void __user *)&rxnfc->fs.ring_cookie) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2919 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
| 2920 | sizeof(rxnfc->rule_cnt))) |
| 2921 | return -EFAULT; |
| 2922 | |
| 2923 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { |
| 2924 | /* As an optimisation, we only copy the actual |
| 2925 | * number of rules that the underlying |
| 2926 | * function returned. Since Mallory might |
| 2927 | * change the rule count in user memory, we |
| 2928 | * check that it is less than the rule count |
| 2929 | * originally given (as the user buffer size), |
| 2930 | * which has been range-checked. |
| 2931 | */ |
| 2932 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) |
| 2933 | return -EFAULT; |
| 2934 | if (actual_rule_cnt < rule_cnt) |
| 2935 | rule_cnt = actual_rule_cnt; |
| 2936 | if (copy_in_user(&compat_rxnfc->rule_locs[0], |
| 2937 | &rxnfc->rule_locs[0], |
| 2938 | rule_cnt * sizeof(u32))) |
| 2939 | return -EFAULT; |
| 2940 | } |
| 2941 | } |
| 2942 | |
| 2943 | return 0; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2944 | } |
| 2945 | |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2946 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
| 2947 | { |
| 2948 | void __user *uptr; |
| 2949 | compat_uptr_t uptr32; |
| 2950 | struct ifreq __user *uifr; |
| 2951 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2952 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2953 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 2954 | return -EFAULT; |
| 2955 | |
| 2956 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
| 2957 | return -EFAULT; |
| 2958 | |
| 2959 | uptr = compat_ptr(uptr32); |
| 2960 | |
| 2961 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) |
| 2962 | return -EFAULT; |
| 2963 | |
| 2964 | return dev_ioctl(net, SIOCWANDEV, uifr); |
| 2965 | } |
| 2966 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2967 | static int bond_ioctl(struct net *net, unsigned int cmd, |
| 2968 | struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2969 | { |
| 2970 | struct ifreq kifr; |
| 2971 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2972 | mm_segment_t old_fs; |
| 2973 | int err; |
| 2974 | u32 data; |
| 2975 | void __user *datap; |
| 2976 | |
| 2977 | switch (cmd) { |
| 2978 | case SIOCBONDENSLAVE: |
| 2979 | case SIOCBONDRELEASE: |
| 2980 | case SIOCBONDSETHWADDR: |
| 2981 | case SIOCBONDCHANGEACTIVE: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2982 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2983 | return -EFAULT; |
| 2984 | |
| 2985 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2986 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 2987 | err = dev_ioctl(net, cmd, |
| 2988 | (struct ifreq __user __force *) &kifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2989 | set_fs(old_fs); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2990 | |
| 2991 | return err; |
| 2992 | case SIOCBONDSLAVEINFOQUERY: |
| 2993 | case SIOCBONDINFOQUERY: |
| 2994 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 2995 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2996 | return -EFAULT; |
| 2997 | |
| 2998 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2999 | return -EFAULT; |
| 3000 | |
| 3001 | datap = compat_ptr(data); |
| 3002 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) |
| 3003 | return -EFAULT; |
| 3004 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3005 | return dev_ioctl(net, cmd, uifr); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3006 | default: |
Linus Torvalds | 07d106d | 2012-01-05 15:40:12 -0800 | [diff] [blame] | 3007 | return -ENOIOCTLCMD; |
Joe Perches | ccbd6a5 | 2010-05-14 10:58:26 +0000 | [diff] [blame] | 3008 | } |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3009 | } |
| 3010 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3011 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
| 3012 | struct compat_ifreq __user *u_ifreq32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3013 | { |
| 3014 | struct ifreq __user *u_ifreq64; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3015 | char tmp_buf[IFNAMSIZ]; |
| 3016 | void __user *data64; |
| 3017 | u32 data32; |
| 3018 | |
| 3019 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), |
| 3020 | IFNAMSIZ)) |
| 3021 | return -EFAULT; |
| 3022 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
| 3023 | return -EFAULT; |
| 3024 | data64 = compat_ptr(data32); |
| 3025 | |
| 3026 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); |
| 3027 | |
| 3028 | /* Don't check these user accesses, just let that get trapped |
| 3029 | * in the ioctl handler instead. |
| 3030 | */ |
| 3031 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
| 3032 | IFNAMSIZ)) |
| 3033 | return -EFAULT; |
| 3034 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
| 3035 | return -EFAULT; |
| 3036 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3037 | return dev_ioctl(net, cmd, u_ifreq64); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3038 | } |
| 3039 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3040 | static int dev_ifsioc(struct net *net, struct socket *sock, |
| 3041 | unsigned int cmd, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3042 | { |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3043 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3044 | int err; |
| 3045 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3046 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 3047 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) |
| 3048 | return -EFAULT; |
| 3049 | |
| 3050 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); |
| 3051 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3052 | if (!err) { |
| 3053 | switch (cmd) { |
| 3054 | case SIOCGIFFLAGS: |
| 3055 | case SIOCGIFMETRIC: |
| 3056 | case SIOCGIFMTU: |
| 3057 | case SIOCGIFMEM: |
| 3058 | case SIOCGIFHWADDR: |
| 3059 | case SIOCGIFINDEX: |
| 3060 | case SIOCGIFADDR: |
| 3061 | case SIOCGIFBRDADDR: |
| 3062 | case SIOCGIFDSTADDR: |
| 3063 | case SIOCGIFNETMASK: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 3064 | case SIOCGIFPFLAGS: |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3065 | case SIOCGIFTXQLEN: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 3066 | case SIOCGMIIPHY: |
| 3067 | case SIOCGMIIREG: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3068 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3069 | err = -EFAULT; |
| 3070 | break; |
| 3071 | } |
| 3072 | } |
| 3073 | return err; |
| 3074 | } |
| 3075 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3076 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
| 3077 | struct compat_ifreq __user *uifr32) |
| 3078 | { |
| 3079 | struct ifreq ifr; |
| 3080 | struct compat_ifmap __user *uifmap32; |
| 3081 | mm_segment_t old_fs; |
| 3082 | int err; |
| 3083 | |
| 3084 | uifmap32 = &uifr32->ifr_ifru.ifru_map; |
| 3085 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 3086 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 3087 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 3088 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 3089 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 3090 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 3091 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3092 | if (err) |
| 3093 | return -EFAULT; |
| 3094 | |
| 3095 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3096 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3097 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3098 | set_fs(old_fs); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3099 | |
| 3100 | if (cmd == SIOCGIFMAP && !err) { |
| 3101 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 3102 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 3103 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 3104 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 3105 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 3106 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 3107 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3108 | if (err) |
| 3109 | err = -EFAULT; |
| 3110 | } |
| 3111 | return err; |
| 3112 | } |
| 3113 | |
| 3114 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) |
| 3115 | { |
| 3116 | void __user *uptr; |
| 3117 | compat_uptr_t uptr32; |
| 3118 | struct ifreq __user *uifr; |
| 3119 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3120 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3121 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 3122 | return -EFAULT; |
| 3123 | |
| 3124 | if (get_user(uptr32, &uifr32->ifr_data)) |
| 3125 | return -EFAULT; |
| 3126 | |
| 3127 | uptr = compat_ptr(uptr32); |
| 3128 | |
| 3129 | if (put_user(uptr, &uifr->ifr_data)) |
| 3130 | return -EFAULT; |
| 3131 | |
| 3132 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); |
| 3133 | } |
| 3134 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3135 | struct rtentry32 { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3136 | u32 rt_pad1; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3137 | struct sockaddr rt_dst; /* target address */ |
| 3138 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ |
| 3139 | struct sockaddr rt_genmask; /* target network mask (IP) */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3140 | unsigned short rt_flags; |
| 3141 | short rt_pad2; |
| 3142 | u32 rt_pad3; |
| 3143 | unsigned char rt_tos; |
| 3144 | unsigned char rt_class; |
| 3145 | short rt_pad4; |
| 3146 | short rt_metric; /* +1 for binary compatibility! */ |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3147 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3148 | u32 rt_mtu; /* per route MTU/Window */ |
| 3149 | u32 rt_window; /* Window clamping */ |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3150 | unsigned short rt_irtt; /* Initial RTT */ |
| 3151 | }; |
| 3152 | |
| 3153 | struct in6_rtmsg32 { |
| 3154 | struct in6_addr rtmsg_dst; |
| 3155 | struct in6_addr rtmsg_src; |
| 3156 | struct in6_addr rtmsg_gateway; |
| 3157 | u32 rtmsg_type; |
| 3158 | u16 rtmsg_dst_len; |
| 3159 | u16 rtmsg_src_len; |
| 3160 | u32 rtmsg_metric; |
| 3161 | u32 rtmsg_info; |
| 3162 | u32 rtmsg_flags; |
| 3163 | s32 rtmsg_ifindex; |
| 3164 | }; |
| 3165 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3166 | static int routing_ioctl(struct net *net, struct socket *sock, |
| 3167 | unsigned int cmd, void __user *argp) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3168 | { |
| 3169 | int ret; |
| 3170 | void *r = NULL; |
| 3171 | struct in6_rtmsg r6; |
| 3172 | struct rtentry r4; |
| 3173 | char devname[16]; |
| 3174 | u32 rtdev; |
| 3175 | mm_segment_t old_fs = get_fs(); |
| 3176 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3177 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
| 3178 | struct in6_rtmsg32 __user *ur6 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3179 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3180 | 3 * sizeof(struct in6_addr)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 3181 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
| 3182 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); |
| 3183 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); |
| 3184 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); |
| 3185 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); |
| 3186 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); |
| 3187 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3188 | |
| 3189 | r = (void *) &r6; |
| 3190 | } else { /* ipv4 */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3191 | struct rtentry32 __user *ur4 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3192 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3193 | 3 * sizeof(struct sockaddr)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 3194 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
| 3195 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); |
| 3196 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); |
| 3197 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); |
| 3198 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); |
| 3199 | ret |= get_user(rtdev, &(ur4->rt_dev)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3200 | if (rtdev) { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3201 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3202 | r4.rt_dev = (char __user __force *)devname; |
| 3203 | devname[15] = 0; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3204 | } else |
| 3205 | r4.rt_dev = NULL; |
| 3206 | |
| 3207 | r = (void *) &r4; |
| 3208 | } |
| 3209 | |
| 3210 | if (ret) { |
| 3211 | ret = -EFAULT; |
| 3212 | goto out; |
| 3213 | } |
| 3214 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3215 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3216 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3217 | set_fs(old_fs); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3218 | |
| 3219 | out: |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3220 | return ret; |
| 3221 | } |
| 3222 | |
| 3223 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE |
| 3224 | * 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] | 3225 | * use compatible ioctls |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3226 | */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3227 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3228 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3229 | compat_ulong_t tmp; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3230 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3231 | if (get_user(tmp, argp)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3232 | return -EFAULT; |
| 3233 | if (tmp == BRCTL_GET_VERSION) |
| 3234 | return BRCTL_VERSION + 1; |
| 3235 | return -EINVAL; |
| 3236 | } |
| 3237 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3238 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
| 3239 | unsigned int cmd, unsigned long arg) |
| 3240 | { |
| 3241 | void __user *argp = compat_ptr(arg); |
| 3242 | struct sock *sk = sock->sk; |
| 3243 | struct net *net = sock_net(sk); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3244 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3245 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
| 3246 | return siocdevprivate_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3247 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3248 | switch (cmd) { |
| 3249 | case SIOCSIFBR: |
| 3250 | case SIOCGIFBR: |
| 3251 | return old_bridge_ioctl(argp); |
| 3252 | case SIOCGIFNAME: |
| 3253 | return dev_ifname32(net, argp); |
| 3254 | case SIOCGIFCONF: |
| 3255 | return dev_ifconf(net, argp); |
| 3256 | case SIOCETHTOOL: |
| 3257 | return ethtool_ioctl(net, argp); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3258 | case SIOCWANDEV: |
| 3259 | return compat_siocwandev(net, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3260 | case SIOCGIFMAP: |
| 3261 | case SIOCSIFMAP: |
| 3262 | return compat_sioc_ifmap(net, cmd, argp); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3263 | case SIOCBONDENSLAVE: |
| 3264 | case SIOCBONDRELEASE: |
| 3265 | case SIOCBONDSETHWADDR: |
| 3266 | case SIOCBONDSLAVEINFOQUERY: |
| 3267 | case SIOCBONDINFOQUERY: |
| 3268 | case SIOCBONDCHANGEACTIVE: |
| 3269 | return bond_ioctl(net, cmd, argp); |
| 3270 | case SIOCADDRT: |
| 3271 | case SIOCDELRT: |
| 3272 | return routing_ioctl(net, sock, cmd, argp); |
| 3273 | case SIOCGSTAMP: |
| 3274 | return do_siocgstamp(net, sock, cmd, argp); |
| 3275 | case SIOCGSTAMPNS: |
| 3276 | return do_siocgstampns(net, sock, cmd, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3277 | case SIOCSHWTSTAMP: |
| 3278 | return compat_siocshwtstamp(net, argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3279 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3280 | case FIOSETOWN: |
| 3281 | case SIOCSPGRP: |
| 3282 | case FIOGETOWN: |
| 3283 | case SIOCGPGRP: |
| 3284 | case SIOCBRADDBR: |
| 3285 | case SIOCBRDELBR: |
| 3286 | case SIOCGIFVLAN: |
| 3287 | case SIOCSIFVLAN: |
| 3288 | case SIOCADDDLCI: |
| 3289 | case SIOCDELDLCI: |
| 3290 | return sock_ioctl(file, cmd, arg); |
| 3291 | |
| 3292 | case SIOCGIFFLAGS: |
| 3293 | case SIOCSIFFLAGS: |
| 3294 | case SIOCGIFMETRIC: |
| 3295 | case SIOCSIFMETRIC: |
| 3296 | case SIOCGIFMTU: |
| 3297 | case SIOCSIFMTU: |
| 3298 | case SIOCGIFMEM: |
| 3299 | case SIOCSIFMEM: |
| 3300 | case SIOCGIFHWADDR: |
| 3301 | case SIOCSIFHWADDR: |
| 3302 | case SIOCADDMULTI: |
| 3303 | case SIOCDELMULTI: |
| 3304 | case SIOCGIFINDEX: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3305 | case SIOCGIFADDR: |
| 3306 | case SIOCSIFADDR: |
| 3307 | case SIOCSIFHWBROADCAST: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3308 | case SIOCDIFADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3309 | case SIOCGIFBRDADDR: |
| 3310 | case SIOCSIFBRDADDR: |
| 3311 | case SIOCGIFDSTADDR: |
| 3312 | case SIOCSIFDSTADDR: |
| 3313 | case SIOCGIFNETMASK: |
| 3314 | case SIOCSIFNETMASK: |
| 3315 | case SIOCSIFPFLAGS: |
| 3316 | case SIOCGIFPFLAGS: |
| 3317 | case SIOCGIFTXQLEN: |
| 3318 | case SIOCSIFTXQLEN: |
| 3319 | case SIOCBRADDIF: |
| 3320 | case SIOCBRDELIF: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3321 | case SIOCSIFNAME: |
| 3322 | case SIOCGMIIPHY: |
| 3323 | case SIOCGMIIREG: |
| 3324 | case SIOCSMIIREG: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3325 | return dev_ifsioc(net, sock, cmd, argp); |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3326 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3327 | case SIOCSARP: |
| 3328 | case SIOCGARP: |
| 3329 | case SIOCDARP: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3330 | case SIOCATMARK: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3331 | return sock_do_ioctl(net, sock, cmd, arg); |
| 3332 | } |
| 3333 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3334 | return -ENOIOCTLCMD; |
| 3335 | } |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3336 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 3337 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3338 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3339 | { |
| 3340 | struct socket *sock = file->private_data; |
| 3341 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3342 | struct sock *sk; |
| 3343 | struct net *net; |
| 3344 | |
| 3345 | sk = sock->sk; |
| 3346 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3347 | |
| 3348 | if (sock->ops->compat_ioctl) |
| 3349 | ret = sock->ops->compat_ioctl(sock, cmd, arg); |
| 3350 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3351 | if (ret == -ENOIOCTLCMD && |
| 3352 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 3353 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 3354 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3355 | if (ret == -ENOIOCTLCMD) |
| 3356 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
| 3357 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3358 | return ret; |
| 3359 | } |
| 3360 | #endif |
| 3361 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3362 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 3363 | { |
| 3364 | return sock->ops->bind(sock, addr, addrlen); |
| 3365 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3366 | EXPORT_SYMBOL(kernel_bind); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3367 | |
| 3368 | int kernel_listen(struct socket *sock, int backlog) |
| 3369 | { |
| 3370 | return sock->ops->listen(sock, backlog); |
| 3371 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3372 | EXPORT_SYMBOL(kernel_listen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3373 | |
| 3374 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 3375 | { |
| 3376 | struct sock *sk = sock->sk; |
| 3377 | int err; |
| 3378 | |
| 3379 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 3380 | newsock); |
| 3381 | if (err < 0) |
| 3382 | goto done; |
| 3383 | |
| 3384 | err = sock->ops->accept(sock, *newsock, flags); |
| 3385 | if (err < 0) { |
| 3386 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 3387 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3388 | goto done; |
| 3389 | } |
| 3390 | |
| 3391 | (*newsock)->ops = sock->ops; |
Wei Yongjun | 1b08534 | 2008-12-18 19:35:10 -0800 | [diff] [blame] | 3392 | __module_get((*newsock)->ops->owner); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3393 | |
| 3394 | done: |
| 3395 | return err; |
| 3396 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3397 | EXPORT_SYMBOL(kernel_accept); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3398 | |
| 3399 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 3400 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3401 | { |
| 3402 | return sock->ops->connect(sock, addr, addrlen, flags); |
| 3403 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3404 | EXPORT_SYMBOL(kernel_connect); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3405 | |
| 3406 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
| 3407 | int *addrlen) |
| 3408 | { |
| 3409 | return sock->ops->getname(sock, addr, addrlen, 0); |
| 3410 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3411 | EXPORT_SYMBOL(kernel_getsockname); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3412 | |
| 3413 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
| 3414 | int *addrlen) |
| 3415 | { |
| 3416 | return sock->ops->getname(sock, addr, addrlen, 1); |
| 3417 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3418 | EXPORT_SYMBOL(kernel_getpeername); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3419 | |
| 3420 | int kernel_getsockopt(struct socket *sock, int level, int optname, |
| 3421 | char *optval, int *optlen) |
| 3422 | { |
| 3423 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3424 | char __user *uoptval; |
| 3425 | int __user *uoptlen; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3426 | int err; |
| 3427 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3428 | uoptval = (char __user __force *) optval; |
| 3429 | uoptlen = (int __user __force *) optlen; |
| 3430 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3431 | set_fs(KERNEL_DS); |
| 3432 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3433 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3434 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3435 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
| 3436 | uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3437 | set_fs(oldfs); |
| 3438 | return err; |
| 3439 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3440 | EXPORT_SYMBOL(kernel_getsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3441 | |
| 3442 | int kernel_setsockopt(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3443 | char *optval, unsigned int optlen) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3444 | { |
| 3445 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3446 | char __user *uoptval; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3447 | int err; |
| 3448 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3449 | uoptval = (char __user __force *) optval; |
| 3450 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3451 | set_fs(KERNEL_DS); |
| 3452 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3453 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3454 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3455 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3456 | optlen); |
| 3457 | set_fs(oldfs); |
| 3458 | return err; |
| 3459 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3460 | EXPORT_SYMBOL(kernel_setsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3461 | |
| 3462 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
| 3463 | size_t size, int flags) |
| 3464 | { |
| 3465 | if (sock->ops->sendpage) |
| 3466 | return sock->ops->sendpage(sock, page, offset, size, flags); |
| 3467 | |
| 3468 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 3469 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3470 | EXPORT_SYMBOL(kernel_sendpage); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3471 | |
| 3472 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
| 3473 | { |
| 3474 | mm_segment_t oldfs = get_fs(); |
| 3475 | int err; |
| 3476 | |
| 3477 | set_fs(KERNEL_DS); |
| 3478 | err = sock->ops->ioctl(sock, cmd, arg); |
| 3479 | set_fs(oldfs); |
| 3480 | |
| 3481 | return err; |
| 3482 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3483 | EXPORT_SYMBOL(kernel_sock_ioctl); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3484 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3485 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 3486 | { |
| 3487 | return sock->ops->shutdown(sock, how); |
| 3488 | } |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3489 | EXPORT_SYMBOL(kernel_sock_shutdown); |