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> |
Daniel Borkmann | 408eccc | 2014-04-01 16:20:23 +0200 | [diff] [blame] | 75 | #include <linux/ptp_classify.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #include <linux/init.h> |
| 77 | #include <linux/poll.h> |
| 78 | #include <linux/cache.h> |
| 79 | #include <linux/module.h> |
| 80 | #include <linux/highmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | #include <linux/mount.h> |
| 82 | #include <linux/security.h> |
| 83 | #include <linux/syscalls.h> |
| 84 | #include <linux/compat.h> |
| 85 | #include <linux/kmod.h> |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 86 | #include <linux/audit.h> |
Adrian Bunk | d86b5e0 | 2006-01-21 00:46:55 +0100 | [diff] [blame] | 87 | #include <linux/wireless.h> |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 88 | #include <linux/nsproxy.h> |
Nick Black | 1fd7317d | 2009-09-22 16:43:33 -0700 | [diff] [blame] | 89 | #include <linux/magic.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 90 | #include <linux/slab.h> |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 91 | #include <linux/xattr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | #include <asm/uaccess.h> |
| 94 | #include <asm/unistd.h> |
| 95 | |
| 96 | #include <net/compat.h> |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 97 | #include <net/wext.h> |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 98 | #include <net/cls_cgroup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | #include <net/sock.h> |
| 101 | #include <linux/netfilter.h> |
| 102 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 103 | #include <linux/if_tun.h> |
| 104 | #include <linux/ipv6_route.h> |
| 105 | #include <linux/route.h> |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 106 | #include <linux/sockios.h> |
| 107 | #include <linux/atalk.h> |
Eliezer Tamir | 076bb0c | 2013-07-10 17:13:17 +0300 | [diff] [blame] | 108 | #include <net/busy_poll.h> |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 109 | #include <linux/errqueue.h> |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 110 | |
Cong Wang | e0d1095 | 2013-08-01 11:10:25 +0800 | [diff] [blame] | 111 | #ifdef CONFIG_NET_RX_BUSY_POLL |
Eliezer Tamir | 64b0dc5 | 2013-07-10 17:13:36 +0300 | [diff] [blame] | 112 | unsigned int sysctl_net_busy_read __read_mostly; |
| 113 | unsigned int sysctl_net_busy_poll __read_mostly; |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 114 | #endif |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 117 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 118 | unsigned long nr_segs, loff_t pos); |
| 119 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 120 | unsigned long nr_segs, loff_t pos); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 121 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | static int sock_close(struct inode *inode, struct file *file); |
| 124 | static unsigned int sock_poll(struct file *file, |
| 125 | struct poll_table_struct *wait); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 126 | 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] | 127 | #ifdef CONFIG_COMPAT |
| 128 | static long compat_sock_ioctl(struct file *file, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 129 | unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 130 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | static int sock_fasync(int fd, struct file *filp, int on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 133 | int offset, size_t size, loff_t *ppos, int more); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 134 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 135 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 136 | unsigned int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | /* |
| 139 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear |
| 140 | * in the operation structures but are done directly via the socketcall() multiplexor. |
| 141 | */ |
| 142 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 143 | static const struct file_operations socket_file_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | .owner = THIS_MODULE, |
| 145 | .llseek = no_llseek, |
| 146 | .aio_read = sock_aio_read, |
| 147 | .aio_write = sock_aio_write, |
| 148 | .poll = sock_poll, |
| 149 | .unlocked_ioctl = sock_ioctl, |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 150 | #ifdef CONFIG_COMPAT |
| 151 | .compat_ioctl = compat_sock_ioctl, |
| 152 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | .mmap = sock_mmap, |
| 154 | .open = sock_no_open, /* special open code to disallow open via /proc */ |
| 155 | .release = sock_close, |
| 156 | .fasync = sock_fasync, |
Jens Axboe | 5274f05 | 2006-03-30 15:15:30 +0200 | [diff] [blame] | 157 | .sendpage = sock_sendpage, |
| 158 | .splice_write = generic_splice_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 159 | .splice_read = sock_splice_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | }; |
| 161 | |
| 162 | /* |
| 163 | * The protocol list. Each protocol is registered in here. |
| 164 | */ |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | static DEFINE_SPINLOCK(net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 167 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | /* |
| 170 | * Statistics counters of the socket lists |
| 171 | */ |
| 172 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 173 | static DEFINE_PER_CPU(int, sockets_in_use); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
| 175 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 176 | * Support routines. |
| 177 | * Move socket addresses back and forth across the kernel/user |
| 178 | * divide and look after the messy bits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | */ |
| 180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | /** |
| 182 | * move_addr_to_kernel - copy a socket address into kernel space |
| 183 | * @uaddr: Address in user space |
| 184 | * @kaddr: Address in kernel space |
| 185 | * @ulen: Length in user space |
| 186 | * |
| 187 | * The address is copied into kernel space. If the provided address is |
| 188 | * too long an error code of -EINVAL is returned. If the copy gives |
| 189 | * invalid addresses -EFAULT is returned. On a success 0 is returned. |
| 190 | */ |
| 191 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 192 | 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] | 193 | { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 194 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 196 | if (ulen == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | return 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 198 | if (copy_from_user(kaddr, uaddr, ulen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 200 | return audit_sockaddr(ulen, kaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | |
| 203 | /** |
| 204 | * move_addr_to_user - copy an address to user space |
| 205 | * @kaddr: kernel space address |
| 206 | * @klen: length of address in kernel |
| 207 | * @uaddr: user space address |
| 208 | * @ulen: pointer to user length field |
| 209 | * |
| 210 | * The value pointed to by ulen on entry is the buffer length available. |
| 211 | * This is overwritten with the buffer space used. -EINVAL is returned |
| 212 | * if an overlong buffer is specified or a negative buffer size. -EFAULT |
| 213 | * is returned if either the buffer or the length field are not |
| 214 | * accessible. |
| 215 | * After copying the data up to the limit the user specifies, the true |
| 216 | * length of the data is written over the length limit the user |
| 217 | * specified. Zero is returned for a success. |
| 218 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 219 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 220 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 221 | void __user *uaddr, int __user *ulen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | { |
| 223 | int err; |
| 224 | int len; |
| 225 | |
Hannes Frederic Sowa | 68c6beb | 2013-11-21 03:14:34 +0100 | [diff] [blame] | 226 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 227 | err = get_user(len, ulen); |
| 228 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 230 | if (len > klen) |
| 231 | len = klen; |
Hannes Frederic Sowa | 68c6beb | 2013-11-21 03:14:34 +0100 | [diff] [blame] | 232 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 234 | if (len) { |
Steve Grubb | d6fe394 | 2006-03-30 12:20:22 -0500 | [diff] [blame] | 235 | if (audit_sockaddr(klen, kaddr)) |
| 236 | return -ENOMEM; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 237 | if (copy_to_user(uaddr, kaddr, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | return -EFAULT; |
| 239 | } |
| 240 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 241 | * "fromlen shall refer to the value before truncation.." |
| 242 | * 1003.1g |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | */ |
| 244 | return __put_user(klen, ulen); |
| 245 | } |
| 246 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 247 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
| 249 | static struct inode *sock_alloc_inode(struct super_block *sb) |
| 250 | { |
| 251 | struct socket_alloc *ei; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 252 | struct socket_wq *wq; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 253 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 254 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | if (!ei) |
| 256 | return NULL; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 257 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
| 258 | if (!wq) { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 259 | kmem_cache_free(sock_inode_cachep, ei); |
| 260 | return NULL; |
| 261 | } |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 262 | init_waitqueue_head(&wq->wait); |
| 263 | wq->fasync_list = NULL; |
| 264 | RCU_INIT_POINTER(ei->socket.wq, wq); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 265 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | ei->socket.state = SS_UNCONNECTED; |
| 267 | ei->socket.flags = 0; |
| 268 | ei->socket.ops = NULL; |
| 269 | ei->socket.sk = NULL; |
| 270 | ei->socket.file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
| 272 | return &ei->vfs_inode; |
| 273 | } |
| 274 | |
| 275 | static void sock_destroy_inode(struct inode *inode) |
| 276 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 277 | struct socket_alloc *ei; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 278 | struct socket_wq *wq; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 279 | |
| 280 | ei = container_of(inode, struct socket_alloc, vfs_inode); |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 281 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
Lai Jiangshan | 6184522 | 2011-03-18 12:10:25 +0800 | [diff] [blame] | 282 | kfree_rcu(wq, rcu); |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 283 | kmem_cache_free(sock_inode_cachep, ei); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | } |
| 285 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 286 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 288 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 290 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | static int init_inodecache(void) |
| 294 | { |
| 295 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 296 | sizeof(struct socket_alloc), |
| 297 | 0, |
| 298 | (SLAB_HWCACHE_ALIGN | |
| 299 | SLAB_RECLAIM_ACCOUNT | |
| 300 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 301 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | if (sock_inode_cachep == NULL) |
| 303 | return -ENOMEM; |
| 304 | return 0; |
| 305 | } |
| 306 | |
Alexey Dobriyan | b87221d | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 307 | static const struct super_operations sockfs_ops = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 308 | .alloc_inode = sock_alloc_inode, |
| 309 | .destroy_inode = sock_destroy_inode, |
| 310 | .statfs = simple_statfs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | }; |
| 312 | |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 313 | /* |
| 314 | * sockfs_dname() is called from d_path(). |
| 315 | */ |
| 316 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) |
| 317 | { |
| 318 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", |
| 319 | dentry->d_inode->i_ino); |
| 320 | } |
| 321 | |
Al Viro | 3ba13d1 | 2009-02-20 06:02:22 +0000 | [diff] [blame] | 322 | static const struct dentry_operations sockfs_dentry_operations = { |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 323 | .d_dname = sockfs_dname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | }; |
| 325 | |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 326 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
| 327 | int flags, const char *dev_name, void *data) |
| 328 | { |
| 329 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, |
| 330 | &sockfs_dentry_operations, SOCKFS_MAGIC); |
| 331 | } |
| 332 | |
| 333 | static struct vfsmount *sock_mnt __read_mostly; |
| 334 | |
| 335 | static struct file_system_type sock_fs_type = { |
| 336 | .name = "sockfs", |
| 337 | .mount = sockfs_mount, |
| 338 | .kill_sb = kill_anon_super, |
| 339 | }; |
| 340 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | /* |
| 342 | * Obtains the first available file descriptor and sets it up for use. |
| 343 | * |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 344 | * These functions create file structures and maps them to fd space |
| 345 | * of the current process. On success it returns file descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | * and file struct implicitly stored in sock->file. |
| 347 | * Note that another thread may close file descriptor before we return |
| 348 | * from this function. We use the fact that now we do not refer |
| 349 | * to socket after mapping. If one day we will need it, this |
| 350 | * function will increment ref. count on file by 1. |
| 351 | * |
| 352 | * In any case returned fd MAY BE not valid! |
| 353 | * This race condition is unavoidable |
| 354 | * with shared fd spaces, we cannot solve it inside kernel, |
| 355 | * but we take care of internal coherence yet. |
| 356 | */ |
| 357 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 358 | 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] | 359 | { |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 360 | struct qstr name = { .name = "" }; |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 361 | struct path path; |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 362 | struct file *file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 363 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 364 | if (dname) { |
| 365 | name.name = dname; |
| 366 | name.len = strlen(name.name); |
| 367 | } else if (sock->sk) { |
| 368 | name.name = sock->sk->sk_prot_creator->name; |
| 369 | name.len = strlen(name.name); |
| 370 | } |
Nick Piggin | 4b93688 | 2011-01-07 17:50:07 +1100 | [diff] [blame] | 371 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 372 | if (unlikely(!path.dentry)) |
| 373 | return ERR_PTR(-ENOMEM); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 374 | path.mnt = mntget(sock_mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 376 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 377 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
| 378 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 379 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 380 | &socket_file_ops); |
Anatol Pomozov | 39b6525 | 2012-09-12 20:11:55 -0700 | [diff] [blame] | 381 | if (unlikely(IS_ERR(file))) { |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 382 | /* drop dentry, keep inode */ |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 383 | ihold(path.dentry->d_inode); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 384 | path_put(&path); |
Anatol Pomozov | 39b6525 | 2012-09-12 20:11:55 -0700 | [diff] [blame] | 385 | return file; |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 386 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 387 | |
| 388 | sock->file = file; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 389 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 390 | file->private_data = sock; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 391 | return 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 | EXPORT_SYMBOL(sock_alloc_file); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 394 | |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 395 | static int sock_map_fd(struct socket *sock, int flags) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 396 | { |
| 397 | struct file *newfile; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 398 | int fd = get_unused_fd_flags(flags); |
| 399 | if (unlikely(fd < 0)) |
| 400 | return fd; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 401 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 402 | newfile = sock_alloc_file(sock, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 403 | if (likely(!IS_ERR(newfile))) { |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 404 | fd_install(fd, newfile); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 405 | return fd; |
| 406 | } |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 407 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 408 | put_unused_fd(fd); |
| 409 | return PTR_ERR(newfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
| 411 | |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 412 | struct socket *sock_from_file(struct file *file, int *err) |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 413 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 414 | if (file->f_op == &socket_file_ops) |
| 415 | return file->private_data; /* set in sock_map_fd */ |
| 416 | |
Eric Dumazet | 23bb80d | 2007-02-08 14:59:57 -0800 | [diff] [blame] | 417 | *err = -ENOTSOCK; |
| 418 | return NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 419 | } |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 420 | EXPORT_SYMBOL(sock_from_file); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | /** |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 423 | * sockfd_lookup - Go from a file number to its socket slot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | * @fd: file handle |
| 425 | * @err: pointer to an error code return |
| 426 | * |
| 427 | * The file handle passed in is locked and the socket it is bound |
| 428 | * too is returned. If an error occurs the err pointer is overwritten |
| 429 | * with a negative errno code and NULL is returned. The function checks |
| 430 | * for both invalid handles and passing a handle which is not a socket. |
| 431 | * |
| 432 | * On a success the socket object pointer is returned. |
| 433 | */ |
| 434 | |
| 435 | struct socket *sockfd_lookup(int fd, int *err) |
| 436 | { |
| 437 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | struct socket *sock; |
| 439 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 440 | file = fget(fd); |
| 441 | if (!file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | *err = -EBADF; |
| 443 | return NULL; |
| 444 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 445 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 446 | sock = sock_from_file(file, err); |
| 447 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | fput(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | return sock; |
| 450 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 451 | EXPORT_SYMBOL(sockfd_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 453 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
| 454 | { |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 455 | struct fd f = fdget(fd); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 456 | struct socket *sock; |
| 457 | |
Hua Zhong | 3672558 | 2006-04-19 15:25:02 -0700 | [diff] [blame] | 458 | *err = -EBADF; |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 459 | if (f.file) { |
| 460 | sock = sock_from_file(f.file, err); |
| 461 | if (likely(sock)) { |
| 462 | *fput_needed = f.flags; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 463 | return sock; |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 464 | } |
| 465 | fdput(f); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 466 | } |
| 467 | return NULL; |
| 468 | } |
| 469 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 470 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
| 471 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) |
| 472 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) |
| 473 | static ssize_t sockfs_getxattr(struct dentry *dentry, |
| 474 | const char *name, void *value, size_t size) |
| 475 | { |
| 476 | const char *proto_name; |
| 477 | size_t proto_size; |
| 478 | int error; |
| 479 | |
| 480 | error = -ENODATA; |
| 481 | if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { |
| 482 | proto_name = dentry->d_name.name; |
| 483 | proto_size = strlen(proto_name); |
| 484 | |
| 485 | if (value) { |
| 486 | error = -ERANGE; |
| 487 | if (proto_size + 1 > size) |
| 488 | goto out; |
| 489 | |
| 490 | strncpy(value, proto_name, proto_size + 1); |
| 491 | } |
| 492 | error = proto_size + 1; |
| 493 | } |
| 494 | |
| 495 | out: |
| 496 | return error; |
| 497 | } |
| 498 | |
| 499 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, |
| 500 | size_t size) |
| 501 | { |
| 502 | ssize_t len; |
| 503 | ssize_t used = 0; |
| 504 | |
| 505 | len = security_inode_listsecurity(dentry->d_inode, buffer, size); |
| 506 | if (len < 0) |
| 507 | return len; |
| 508 | used += len; |
| 509 | if (buffer) { |
| 510 | if (size < used) |
| 511 | return -ERANGE; |
| 512 | buffer += len; |
| 513 | } |
| 514 | |
| 515 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); |
| 516 | used += len; |
| 517 | if (buffer) { |
| 518 | if (size < used) |
| 519 | return -ERANGE; |
| 520 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); |
| 521 | buffer += len; |
| 522 | } |
| 523 | |
| 524 | return used; |
| 525 | } |
| 526 | |
| 527 | static const struct inode_operations sockfs_inode_ops = { |
| 528 | .getxattr = sockfs_getxattr, |
| 529 | .listxattr = sockfs_listxattr, |
| 530 | }; |
| 531 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | /** |
| 533 | * sock_alloc - allocate a socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 534 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | * Allocate a new inode and socket object. The two are bound together |
| 536 | * and initialised. The socket is then returned. If we are out of inodes |
| 537 | * NULL is returned. |
| 538 | */ |
| 539 | |
| 540 | static struct socket *sock_alloc(void) |
| 541 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 542 | struct inode *inode; |
| 543 | struct socket *sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Eric Dumazet | a209dfc | 2011-07-26 11:36:34 +0200 | [diff] [blame] | 545 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | if (!inode) |
| 547 | return NULL; |
| 548 | |
| 549 | sock = SOCKET_I(inode); |
| 550 | |
Eric Dumazet | 29a020d | 2009-09-15 02:39:20 -0700 | [diff] [blame] | 551 | kmemcheck_annotate_bitfield(sock, type); |
Christoph Hellwig | 85fe402 | 2010-10-23 11:19:54 -0400 | [diff] [blame] | 552 | inode->i_ino = get_next_ino(); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 553 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
David Howells | 8192b0c | 2008-11-14 10:39:10 +1100 | [diff] [blame] | 554 | inode->i_uid = current_fsuid(); |
| 555 | inode->i_gid = current_fsgid(); |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 556 | inode->i_op = &sockfs_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
Alex Shi | 19e8d69 | 2012-05-14 14:15:31 -0700 | [diff] [blame] | 558 | this_cpu_add(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | return sock; |
| 560 | } |
| 561 | |
| 562 | /* |
| 563 | * In theory you can't get an open on this inode, but /proc provides |
| 564 | * a back door. Remember to keep it shut otherwise you'll let the |
| 565 | * creepy crawlies in. |
| 566 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 567 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
| 569 | { |
| 570 | return -ENXIO; |
| 571 | } |
| 572 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 573 | const struct file_operations bad_sock_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | .owner = THIS_MODULE, |
| 575 | .open = sock_no_open, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 576 | .llseek = noop_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | }; |
| 578 | |
| 579 | /** |
| 580 | * sock_release - close a socket |
| 581 | * @sock: socket to close |
| 582 | * |
| 583 | * The socket is released from the protocol stack if it has a release |
| 584 | * 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] | 585 | * an inode not a file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | void sock_release(struct socket *sock) |
| 589 | { |
| 590 | if (sock->ops) { |
| 591 | struct module *owner = sock->ops->owner; |
| 592 | |
| 593 | sock->ops->release(sock); |
| 594 | sock->ops = NULL; |
| 595 | module_put(owner); |
| 596 | } |
| 597 | |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 598 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 599 | pr_err("%s: fasync list not empty!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | |
Mikulas Patocka | b09e786 | 2012-07-19 06:13:36 +0000 | [diff] [blame] | 601 | if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) |
| 602 | return; |
| 603 | |
Alex Shi | 19e8d69 | 2012-05-14 14:15:31 -0700 | [diff] [blame] | 604 | this_cpu_sub(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | if (!sock->file) { |
| 606 | iput(SOCK_INODE(sock)); |
| 607 | return; |
| 608 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 609 | sock->file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 611 | EXPORT_SYMBOL(sock_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
Willem de Bruijn | 67cc0d4 | 2014-09-08 19:58:58 -0400 | [diff] [blame] | 613 | void __sock_tx_timestamp(const struct sock *sk, __u8 *tx_flags) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 614 | { |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 615 | u8 flags = *tx_flags; |
| 616 | |
Willem de Bruijn | b9f40e2 | 2014-08-04 22:11:46 -0400 | [diff] [blame] | 617 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 618 | flags |= SKBTX_HW_TSTAMP; |
| 619 | |
Willem de Bruijn | b9f40e2 | 2014-08-04 22:11:46 -0400 | [diff] [blame] | 620 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 621 | flags |= SKBTX_SW_TSTAMP; |
| 622 | |
Willem de Bruijn | e7fd288 | 2014-08-04 22:11:48 -0400 | [diff] [blame] | 623 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 624 | flags |= SKBTX_SCHED_TSTAMP; |
| 625 | |
Willem de Bruijn | e1c8a60 | 2014-08-04 22:11:50 -0400 | [diff] [blame] | 626 | if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 627 | flags |= SKBTX_ACK_TSTAMP; |
Willem de Bruijn | e7fd288 | 2014-08-04 22:11:48 -0400 | [diff] [blame] | 628 | |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 629 | *tx_flags = flags; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 630 | } |
Willem de Bruijn | 67cc0d4 | 2014-09-08 19:58:58 -0400 | [diff] [blame] | 631 | EXPORT_SYMBOL(__sock_tx_timestamp); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 632 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 633 | static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 634 | struct msghdr *msg, size_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | { |
| 636 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | |
| 638 | si->sock = sock; |
| 639 | si->scm = NULL; |
| 640 | si->msg = msg; |
| 641 | si->size = size; |
| 642 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | return sock->ops->sendmsg(iocb, sock, msg, size); |
| 644 | } |
| 645 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 646 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
| 647 | struct msghdr *msg, size_t size) |
| 648 | { |
| 649 | int err = security_socket_sendmsg(sock, msg, size); |
| 650 | |
| 651 | return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); |
| 652 | } |
| 653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
| 655 | { |
| 656 | struct kiocb iocb; |
| 657 | struct sock_iocb siocb; |
| 658 | int ret; |
| 659 | |
| 660 | init_sync_kiocb(&iocb, NULL); |
| 661 | iocb.private = &siocb; |
| 662 | ret = __sock_sendmsg(&iocb, sock, msg, size); |
| 663 | if (-EIOCBQUEUED == ret) |
| 664 | ret = wait_on_sync_kiocb(&iocb); |
| 665 | return ret; |
| 666 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 667 | EXPORT_SYMBOL(sock_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
Eric Dumazet | 894dc24 | 2011-07-26 02:39:41 +0000 | [diff] [blame] | 669 | 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] | 670 | { |
| 671 | struct kiocb iocb; |
| 672 | struct sock_iocb siocb; |
| 673 | int ret; |
| 674 | |
| 675 | init_sync_kiocb(&iocb, NULL); |
| 676 | iocb.private = &siocb; |
| 677 | ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); |
| 678 | if (-EIOCBQUEUED == ret) |
| 679 | ret = wait_on_sync_kiocb(&iocb); |
| 680 | return ret; |
| 681 | } |
| 682 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 684 | struct kvec *vec, size_t num, size_t size) |
| 685 | { |
| 686 | mm_segment_t oldfs = get_fs(); |
| 687 | int result; |
| 688 | |
| 689 | set_fs(KERNEL_DS); |
| 690 | /* |
| 691 | * the following is safe, since for compiler definitions of kvec and |
| 692 | * iovec are identical, yielding the same in-core layout and alignment |
| 693 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 694 | msg->msg_iov = (struct iovec *)vec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | msg->msg_iovlen = num; |
| 696 | result = sock_sendmsg(sock, msg, size); |
| 697 | set_fs(oldfs); |
| 698 | return result; |
| 699 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 700 | EXPORT_SYMBOL(kernel_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 702 | /* |
| 703 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 704 | */ |
| 705 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 706 | struct sk_buff *skb) |
| 707 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 708 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 709 | struct scm_timestamping tss; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 710 | int empty = 1; |
| 711 | struct skb_shared_hwtstamps *shhwtstamps = |
| 712 | skb_hwtstamps(skb); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 713 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 714 | /* Race occurred between timestamp enabling and packet |
| 715 | receiving. Fill in the current time for now. */ |
| 716 | if (need_software_tstamp && skb->tstamp.tv64 == 0) |
| 717 | __net_timestamp(skb); |
| 718 | |
| 719 | if (need_software_tstamp) { |
| 720 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
| 721 | struct timeval tv; |
| 722 | skb_get_timestamp(skb, &tv); |
| 723 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, |
| 724 | sizeof(tv), &tv); |
| 725 | } else { |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 726 | struct timespec ts; |
| 727 | skb_get_timestampns(skb, &ts); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 728 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 729 | sizeof(ts), &ts); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 730 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 731 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 732 | |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 733 | memset(&tss, 0, sizeof(tss)); |
Willem de Bruijn | c199105 | 2014-09-03 12:01:18 -0400 | [diff] [blame] | 734 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 735 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 736 | empty = 0; |
Willem de Bruijn | 4d276eb | 2014-07-25 18:01:32 -0400 | [diff] [blame] | 737 | if (shhwtstamps && |
Willem de Bruijn | b9f40e2 | 2014-08-04 22:11:46 -0400 | [diff] [blame] | 738 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 739 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) |
Willem de Bruijn | 4d276eb | 2014-07-25 18:01:32 -0400 | [diff] [blame] | 740 | empty = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 741 | if (!empty) |
| 742 | put_cmsg(msg, SOL_SOCKET, |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 743 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 744 | } |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 745 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 746 | |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 747 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
| 748 | struct sk_buff *skb) |
| 749 | { |
| 750 | int ack; |
| 751 | |
| 752 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) |
| 753 | return; |
| 754 | if (!skb->wifi_acked_valid) |
| 755 | return; |
| 756 | |
| 757 | ack = skb->wifi_acked; |
| 758 | |
| 759 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); |
| 760 | } |
| 761 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); |
| 762 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 763 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
| 764 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 765 | { |
| 766 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) |
| 767 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
| 768 | sizeof(__u32), &skb->dropcount); |
| 769 | } |
| 770 | |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 771 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 772 | struct sk_buff *skb) |
| 773 | { |
| 774 | sock_recv_timestamp(msg, sk, skb); |
| 775 | sock_recv_drops(msg, sk, skb); |
| 776 | } |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 777 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 778 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 779 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
| 780 | struct msghdr *msg, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
| 783 | |
| 784 | si->sock = sock; |
| 785 | si->scm = NULL; |
| 786 | si->msg = msg; |
| 787 | si->size = size; |
| 788 | si->flags = flags; |
| 789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
| 791 | } |
| 792 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 793 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 794 | struct msghdr *msg, size_t size, int flags) |
| 795 | { |
| 796 | int err = security_socket_recvmsg(sock, msg, size, flags); |
| 797 | |
| 798 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); |
| 799 | } |
| 800 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 801 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | size_t size, int flags) |
| 803 | { |
| 804 | struct kiocb iocb; |
| 805 | struct sock_iocb siocb; |
| 806 | int ret; |
| 807 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 808 | init_sync_kiocb(&iocb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | iocb.private = &siocb; |
| 810 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); |
| 811 | if (-EIOCBQUEUED == ret) |
| 812 | ret = wait_on_sync_kiocb(&iocb); |
| 813 | return ret; |
| 814 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 815 | EXPORT_SYMBOL(sock_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 817 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
| 818 | size_t size, int flags) |
| 819 | { |
| 820 | struct kiocb iocb; |
| 821 | struct sock_iocb siocb; |
| 822 | int ret; |
| 823 | |
| 824 | init_sync_kiocb(&iocb, NULL); |
| 825 | iocb.private = &siocb; |
| 826 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); |
| 827 | if (-EIOCBQUEUED == ret) |
| 828 | ret = wait_on_sync_kiocb(&iocb); |
| 829 | return ret; |
| 830 | } |
| 831 | |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 832 | /** |
| 833 | * kernel_recvmsg - Receive a message from a socket (kernel space) |
| 834 | * @sock: The socket to receive the message from |
| 835 | * @msg: Received message |
| 836 | * @vec: Input s/g array for message data |
| 837 | * @num: Size of input s/g array |
| 838 | * @size: Number of bytes to read |
| 839 | * @flags: Message flags (MSG_DONTWAIT, etc...) |
| 840 | * |
| 841 | * On return the msg structure contains the scatter/gather array passed in the |
| 842 | * vec argument. The array is modified so that it consists of the unfilled |
| 843 | * portion of the original array. |
| 844 | * |
| 845 | * The returned value is the total number of bytes received, or an error. |
| 846 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 847 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 848 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | { |
| 850 | mm_segment_t oldfs = get_fs(); |
| 851 | int result; |
| 852 | |
| 853 | set_fs(KERNEL_DS); |
| 854 | /* |
| 855 | * the following is safe, since for compiler definitions of kvec and |
| 856 | * iovec are identical, yielding the same in-core layout and alignment |
| 857 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 858 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | result = sock_recvmsg(sock, msg, size, flags); |
| 860 | set_fs(oldfs); |
| 861 | return result; |
| 862 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 863 | EXPORT_SYMBOL(kernel_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 865 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 866 | int offset, size_t size, loff_t *ppos, int more) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | { |
| 868 | struct socket *sock; |
| 869 | int flags; |
| 870 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 871 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | |
Eric Dumazet | 35f9c09 | 2012-04-05 03:05:35 +0000 | [diff] [blame] | 873 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 874 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ |
| 875 | flags |= more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | |
Linus Torvalds | e694958 | 2009-08-13 08:28:36 -0700 | [diff] [blame] | 877 | return kernel_sendpage(sock, page, offset, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | } |
| 879 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 880 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 881 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 882 | unsigned int flags) |
| 883 | { |
| 884 | struct socket *sock = file->private_data; |
| 885 | |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 886 | if (unlikely(!sock->ops->splice_read)) |
| 887 | return -EINVAL; |
| 888 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 889 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
| 890 | } |
| 891 | |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 892 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 893 | struct sock_iocb *siocb) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 894 | { |
Kent Overstreet | d29c445 | 2013-03-18 11:09:26 -0700 | [diff] [blame] | 895 | if (!is_sync_kiocb(iocb)) |
| 896 | BUG(); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 897 | |
| 898 | siocb->kiocb = iocb; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 899 | iocb->private = siocb; |
| 900 | return siocb; |
| 901 | } |
| 902 | |
| 903 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 904 | struct file *file, const struct iovec *iov, |
| 905 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 906 | { |
| 907 | struct socket *sock = file->private_data; |
| 908 | size_t size = 0; |
| 909 | int i; |
| 910 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 911 | for (i = 0; i < nr_segs; i++) |
| 912 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 913 | |
| 914 | msg->msg_name = NULL; |
| 915 | msg->msg_namelen = 0; |
| 916 | msg->msg_control = NULL; |
| 917 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 918 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 919 | msg->msg_iovlen = nr_segs; |
| 920 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 921 | |
| 922 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); |
| 923 | } |
| 924 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 925 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 926 | unsigned long nr_segs, loff_t pos) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 927 | { |
| 928 | struct sock_iocb siocb, *x; |
| 929 | |
| 930 | if (pos != 0) |
| 931 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 932 | |
Kent Overstreet | 73a7075 | 2013-05-09 15:03:42 -0700 | [diff] [blame] | 933 | if (iocb->ki_nbytes == 0) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 934 | return 0; |
| 935 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 936 | |
| 937 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 938 | if (!x) |
| 939 | return -ENOMEM; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 940 | 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] | 941 | } |
| 942 | |
| 943 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 944 | struct file *file, const struct iovec *iov, |
| 945 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 946 | { |
| 947 | struct socket *sock = file->private_data; |
| 948 | size_t size = 0; |
| 949 | int i; |
| 950 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 951 | for (i = 0; i < nr_segs; i++) |
| 952 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 953 | |
| 954 | msg->msg_name = NULL; |
| 955 | msg->msg_namelen = 0; |
| 956 | msg->msg_control = NULL; |
| 957 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 958 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 959 | msg->msg_iovlen = nr_segs; |
| 960 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 961 | if (sock->type == SOCK_SEQPACKET) |
| 962 | msg->msg_flags |= MSG_EOR; |
| 963 | |
| 964 | return __sock_sendmsg(iocb, sock, msg, size); |
| 965 | } |
| 966 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 967 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 968 | unsigned long nr_segs, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | { |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 970 | struct sock_iocb siocb, *x; |
| 971 | |
| 972 | if (pos != 0) |
| 973 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 974 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 975 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 976 | if (!x) |
| 977 | return -ENOMEM; |
| 978 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 979 | 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] | 980 | } |
| 981 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | /* |
| 983 | * Atomic setting of ioctl hooks to avoid race |
| 984 | * with module unload. |
| 985 | */ |
| 986 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 987 | static DEFINE_MUTEX(br_ioctl_mutex); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 988 | 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] | 989 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 990 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 992 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 994 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 995 | } |
| 996 | EXPORT_SYMBOL(brioctl_set); |
| 997 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 998 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 999 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1001 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1003 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1005 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | } |
| 1007 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 1008 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1009 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1010 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1012 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1013 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1014 | mutex_lock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | dlci_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1016 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | } |
| 1018 | EXPORT_SYMBOL(dlci_ioctl_set); |
| 1019 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1020 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
| 1021 | unsigned int cmd, unsigned long arg) |
| 1022 | { |
| 1023 | int err; |
| 1024 | void __user *argp = (void __user *)arg; |
| 1025 | |
| 1026 | err = sock->ops->ioctl(sock, cmd, arg); |
| 1027 | |
| 1028 | /* |
| 1029 | * If this ioctl is unknown try to hand it down |
| 1030 | * to the NIC driver. |
| 1031 | */ |
| 1032 | if (err == -ENOIOCTLCMD) |
| 1033 | err = dev_ioctl(net, cmd, argp); |
| 1034 | |
| 1035 | return err; |
| 1036 | } |
| 1037 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | /* |
| 1039 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 1040 | * what to do with it - that's up to the protocol still. |
| 1041 | */ |
| 1042 | |
| 1043 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 1044 | { |
| 1045 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1046 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | void __user *argp = (void __user *)arg; |
| 1048 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1049 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1051 | sock = file->private_data; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1052 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1053 | net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1055 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1057 | #ifdef CONFIG_WEXT_CORE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1059 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 1061 | #endif |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1062 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | case FIOSETOWN: |
| 1064 | case SIOCSPGRP: |
| 1065 | err = -EFAULT; |
| 1066 | if (get_user(pid, (int __user *)argp)) |
| 1067 | break; |
Jeff Layton | e0b93ed | 2014-08-22 11:27:32 -0400 | [diff] [blame] | 1068 | f_setown(sock->file, pid, 1); |
| 1069 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | break; |
| 1071 | case FIOGETOWN: |
| 1072 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 1073 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1074 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | break; |
| 1076 | case SIOCGIFBR: |
| 1077 | case SIOCSIFBR: |
| 1078 | case SIOCBRADDBR: |
| 1079 | case SIOCBRDELBR: |
| 1080 | err = -ENOPKG; |
| 1081 | if (!br_ioctl_hook) |
| 1082 | request_module("bridge"); |
| 1083 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1084 | mutex_lock(&br_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1085 | if (br_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1086 | err = br_ioctl_hook(net, cmd, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1087 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | break; |
| 1089 | case SIOCGIFVLAN: |
| 1090 | case SIOCSIFVLAN: |
| 1091 | err = -ENOPKG; |
| 1092 | if (!vlan_ioctl_hook) |
| 1093 | request_module("8021q"); |
| 1094 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1095 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 1097 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 1098 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | case SIOCADDDLCI: |
| 1101 | case SIOCDELDLCI: |
| 1102 | err = -ENOPKG; |
| 1103 | if (!dlci_ioctl_hook) |
| 1104 | request_module("dlci"); |
| 1105 | |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1106 | mutex_lock(&dlci_ioctl_mutex); |
| 1107 | if (dlci_ioctl_hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1108 | err = dlci_ioctl_hook(cmd, argp); |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 1109 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | break; |
| 1111 | default: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 1112 | err = sock_do_ioctl(net, sock, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | break; |
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 | return err; |
| 1116 | } |
| 1117 | |
| 1118 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 1119 | { |
| 1120 | int err; |
| 1121 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1123 | err = security_socket_create(family, type, protocol, 1); |
| 1124 | if (err) |
| 1125 | goto out; |
| 1126 | |
| 1127 | sock = sock_alloc(); |
| 1128 | if (!sock) { |
| 1129 | err = -ENOMEM; |
| 1130 | goto out; |
| 1131 | } |
| 1132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1134 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 1135 | if (err) |
| 1136 | goto out_release; |
| 1137 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | out: |
| 1139 | *res = sock; |
| 1140 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1141 | out_release: |
| 1142 | sock_release(sock); |
| 1143 | sock = NULL; |
| 1144 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1145 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1146 | EXPORT_SYMBOL(sock_create_lite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | |
| 1148 | /* No kernel lock held - perfect */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1149 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | { |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1151 | unsigned int busy_flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | struct socket *sock; |
| 1153 | |
| 1154 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1155 | * 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] | 1156 | */ |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1157 | sock = file->private_data; |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1158 | |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1159 | if (sk_can_busy_loop(sock->sk)) { |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1160 | /* this socket can poll_ll so tell the system call */ |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1161 | busy_flag = POLL_BUSY_LOOP; |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1162 | |
| 1163 | /* once, only if requested by syscall */ |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1164 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
| 1165 | sk_busy_loop(sock->sk, 1); |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1166 | } |
| 1167 | |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1168 | return busy_flag | sock->ops->poll(file, sock, wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | } |
| 1170 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1171 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1173 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | |
| 1175 | return sock->ops->mmap(file, sock, vma); |
| 1176 | } |
| 1177 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1178 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | sock_release(SOCKET_I(inode)); |
| 1181 | return 0; |
| 1182 | } |
| 1183 | |
| 1184 | /* |
| 1185 | * Update the socket async list |
| 1186 | * |
| 1187 | * Fasync_list locking strategy. |
| 1188 | * |
| 1189 | * 1. fasync_list is modified only under process context socket lock |
| 1190 | * i.e. under semaphore. |
| 1191 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1192 | * or under socket lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | */ |
| 1194 | |
| 1195 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1196 | { |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1197 | struct socket *sock = filp->private_data; |
| 1198 | struct sock *sk = sock->sk; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1199 | struct socket_wq *wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1201 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | |
| 1204 | lock_sock(sk); |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1205 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
| 1206 | fasync_helper(fd, filp, on, &wq->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1208 | if (!wq->fasync_list) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1209 | sock_reset_flag(sk, SOCK_FASYNC); |
Jonathan Corbet | 7639842 | 2009-02-01 14:26:59 -0700 | [diff] [blame] | 1210 | else |
Eric Dumazet | bcdce71 | 2009-10-06 17:28:29 -0700 | [diff] [blame] | 1211 | sock_set_flag(sk, SOCK_FASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1213 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | return 0; |
| 1215 | } |
| 1216 | |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1217 | /* 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] | 1218 | |
| 1219 | int sock_wake_async(struct socket *sock, int how, int band) |
| 1220 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1221 | struct socket_wq *wq; |
| 1222 | |
| 1223 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1224 | return -1; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1225 | rcu_read_lock(); |
| 1226 | wq = rcu_dereference(sock->wq); |
| 1227 | if (!wq || !wq->fasync_list) { |
| 1228 | rcu_read_unlock(); |
| 1229 | return -1; |
| 1230 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1231 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1232 | case SOCK_WAKE_WAITD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
| 1234 | break; |
| 1235 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1236 | case SOCK_WAKE_SPACE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
| 1238 | break; |
| 1239 | /* fall through */ |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1240 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1241 | call_kill: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1242 | kill_fasync(&wq->fasync_list, SIGIO, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1244 | case SOCK_WAKE_URG: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1245 | kill_fasync(&wq->fasync_list, SIGURG, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | } |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1247 | rcu_read_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | return 0; |
| 1249 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1250 | EXPORT_SYMBOL(sock_wake_async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1251 | |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1252 | int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1253 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | { |
| 1255 | int err; |
| 1256 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1257 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1258 | |
| 1259 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1260 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | */ |
| 1262 | if (family < 0 || family >= NPROTO) |
| 1263 | return -EAFNOSUPPORT; |
| 1264 | if (type < 0 || type >= SOCK_MAX) |
| 1265 | return -EINVAL; |
| 1266 | |
| 1267 | /* Compatibility. |
| 1268 | |
| 1269 | This uglymoron is moved from INET layer to here to avoid |
| 1270 | deadlock in module load. |
| 1271 | */ |
| 1272 | if (family == PF_INET && type == SOCK_PACKET) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1273 | static int warned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | if (!warned) { |
| 1275 | warned = 1; |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 1276 | pr_info("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1277 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | } |
| 1279 | family = PF_PACKET; |
| 1280 | } |
| 1281 | |
| 1282 | err = security_socket_create(family, type, protocol, kern); |
| 1283 | if (err) |
| 1284 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1285 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1286 | /* |
| 1287 | * Allocate the socket and allow the family to set things up. if |
| 1288 | * the protocol is 0, the family is instructed to select an appropriate |
| 1289 | * default. |
| 1290 | */ |
| 1291 | sock = sock_alloc(); |
| 1292 | if (!sock) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1293 | net_warn_ratelimited("socket: no more sockets\n"); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1294 | return -ENFILE; /* Not exactly a match, but its the |
| 1295 | closest posix thing */ |
| 1296 | } |
| 1297 | |
| 1298 | sock->type = type; |
| 1299 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1300 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1301 | /* Attempt to load a protocol module if the find failed. |
| 1302 | * |
| 1303 | * 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] | 1304 | * requested real, full-featured networking support upon configuration. |
| 1305 | * Otherwise module support will break! |
| 1306 | */ |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 1307 | if (rcu_access_pointer(net_families[family]) == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1308 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | #endif |
| 1310 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1311 | rcu_read_lock(); |
| 1312 | pf = rcu_dereference(net_families[family]); |
| 1313 | err = -EAFNOSUPPORT; |
| 1314 | if (!pf) |
| 1315 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | |
| 1317 | /* |
| 1318 | * We will call the ->create function, that possibly is in a loadable |
| 1319 | * module, so we have to bump that loadable module refcnt first. |
| 1320 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1321 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | goto out_release; |
| 1323 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1324 | /* Now protected by module ref count */ |
| 1325 | rcu_read_unlock(); |
| 1326 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 1327 | err = pf->create(net, sock, protocol, kern); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1328 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | /* |
| 1332 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1333 | * socket at sock_release time we decrement its refcnt. |
| 1334 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1335 | if (!try_module_get(sock->ops->owner)) |
| 1336 | goto out_module_busy; |
| 1337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1338 | /* |
| 1339 | * Now that we're done with the ->create function, the [loadable] |
| 1340 | * module can have its refcnt decremented |
| 1341 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1342 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1343 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1344 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1345 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1346 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1347 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1348 | return 0; |
| 1349 | |
| 1350 | out_module_busy: |
| 1351 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1353 | sock->ops = NULL; |
| 1354 | module_put(pf->owner); |
| 1355 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1357 | return err; |
| 1358 | |
| 1359 | out_release: |
| 1360 | rcu_read_unlock(); |
| 1361 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1362 | } |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1363 | EXPORT_SYMBOL(__sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | |
| 1365 | int sock_create(int family, int type, int protocol, struct socket **res) |
| 1366 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1367 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1369 | EXPORT_SYMBOL(sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | |
| 1371 | int sock_create_kern(int family, int type, int protocol, struct socket **res) |
| 1372 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1373 | return __sock_create(&init_net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1375 | EXPORT_SYMBOL(sock_create_kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1376 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1377 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | { |
| 1379 | int retval; |
| 1380 | struct socket *sock; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1381 | int flags; |
| 1382 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1383 | /* Check the SOCK_* constants for consistency. */ |
| 1384 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1385 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1386 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1387 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1388 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1389 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1390 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1391 | return -EINVAL; |
| 1392 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1393 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1394 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1395 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | retval = sock_create(family, type, protocol, &sock); |
| 1398 | if (retval < 0) |
| 1399 | goto out; |
| 1400 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1401 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | if (retval < 0) |
| 1403 | goto out_release; |
| 1404 | |
| 1405 | out: |
| 1406 | /* It may be already another descriptor 8) Not kernel problem. */ |
| 1407 | return retval; |
| 1408 | |
| 1409 | out_release: |
| 1410 | sock_release(sock); |
| 1411 | return retval; |
| 1412 | } |
| 1413 | |
| 1414 | /* |
| 1415 | * Create a pair of connected sockets. |
| 1416 | */ |
| 1417 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1418 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
| 1419 | int __user *, usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | { |
| 1421 | struct socket *sock1, *sock2; |
| 1422 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1423 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1424 | int flags; |
| 1425 | |
| 1426 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1427 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1428 | return -EINVAL; |
| 1429 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1431 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1432 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1433 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1434 | /* |
| 1435 | * Obtain the first socket and check if the underlying protocol |
| 1436 | * supports the socketpair call. |
| 1437 | */ |
| 1438 | |
| 1439 | err = sock_create(family, type, protocol, &sock1); |
| 1440 | if (err < 0) |
| 1441 | goto out; |
| 1442 | |
| 1443 | err = sock_create(family, type, protocol, &sock2); |
| 1444 | if (err < 0) |
| 1445 | goto out_release_1; |
| 1446 | |
| 1447 | err = sock1->ops->socketpair(sock1, sock2); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1448 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | goto out_release_both; |
| 1450 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1451 | fd1 = get_unused_fd_flags(flags); |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1452 | if (unlikely(fd1 < 0)) { |
| 1453 | err = fd1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | goto out_release_both; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1455 | } |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1456 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1457 | fd2 = get_unused_fd_flags(flags); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1458 | if (unlikely(fd2 < 0)) { |
| 1459 | err = fd2; |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1460 | goto out_put_unused_1; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1461 | } |
| 1462 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1463 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1464 | if (unlikely(IS_ERR(newfile1))) { |
| 1465 | err = PTR_ERR(newfile1); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1466 | goto out_put_unused_both; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1467 | } |
| 1468 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1469 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1470 | if (IS_ERR(newfile2)) { |
| 1471 | err = PTR_ERR(newfile2); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1472 | goto out_fput_1; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1473 | } |
| 1474 | |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1475 | err = put_user(fd1, &usockvec[0]); |
| 1476 | if (err) |
| 1477 | goto out_fput_both; |
| 1478 | |
| 1479 | err = put_user(fd2, &usockvec[1]); |
| 1480 | if (err) |
| 1481 | goto out_fput_both; |
| 1482 | |
Al Viro | 157cf64 | 2008-12-14 04:57:47 -0500 | [diff] [blame] | 1483 | audit_fd_pair(fd1, fd2); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1484 | |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1485 | fd_install(fd1, newfile1); |
| 1486 | fd_install(fd2, newfile2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | /* fd1 and fd2 may be already another descriptors. |
| 1488 | * Not kernel problem. |
| 1489 | */ |
| 1490 | |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1491 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1492 | |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1493 | out_fput_both: |
| 1494 | fput(newfile2); |
| 1495 | fput(newfile1); |
| 1496 | put_unused_fd(fd2); |
| 1497 | put_unused_fd(fd1); |
| 1498 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1500 | out_fput_1: |
| 1501 | fput(newfile1); |
| 1502 | put_unused_fd(fd2); |
| 1503 | put_unused_fd(fd1); |
| 1504 | sock_release(sock2); |
| 1505 | goto out; |
| 1506 | |
| 1507 | out_put_unused_both: |
| 1508 | put_unused_fd(fd2); |
| 1509 | out_put_unused_1: |
| 1510 | put_unused_fd(fd1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | out_release_both: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1512 | sock_release(sock2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1513 | out_release_1: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1514 | sock_release(sock1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1515 | out: |
| 1516 | return err; |
| 1517 | } |
| 1518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | /* |
| 1520 | * Bind a name to a socket. Nothing much to do here since it's |
| 1521 | * the protocol's responsibility to handle the local address. |
| 1522 | * |
| 1523 | * We move the socket address to kernel space before we call |
| 1524 | * the protocol layer (having also checked the address is ok). |
| 1525 | */ |
| 1526 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1527 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | { |
| 1529 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1530 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1531 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1533 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1534 | if (sock) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1535 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1536 | if (err >= 0) { |
| 1537 | err = security_socket_bind(sock, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1538 | (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1539 | addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1540 | if (!err) |
| 1541 | err = sock->ops->bind(sock, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1542 | (struct sockaddr *) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1543 | &address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | } |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1545 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1546 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | return err; |
| 1548 | } |
| 1549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | /* |
| 1551 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1552 | * necessary for a listen, and if that works, we mark the socket as |
| 1553 | * ready for listening. |
| 1554 | */ |
| 1555 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1556 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | { |
| 1558 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1559 | int err, fput_needed; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1560 | int somaxconn; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1561 | |
| 1562 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1563 | if (sock) { |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 1564 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1565 | if ((unsigned int)backlog > somaxconn) |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1566 | backlog = somaxconn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | |
| 1568 | err = security_socket_listen(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1569 | if (!err) |
| 1570 | err = sock->ops->listen(sock, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1572 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | } |
| 1574 | return err; |
| 1575 | } |
| 1576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | /* |
| 1578 | * For accept, we attempt to create a new socket, set up the link |
| 1579 | * with the client, wake up the client, then return the new |
| 1580 | * connected fd. We collect the address of the connector in kernel |
| 1581 | * space and move it to user at the very end. This is unclean because |
| 1582 | * we open the socket then return an error. |
| 1583 | * |
| 1584 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 1585 | * status to recvmsg. We need to add that support in a way thats |
| 1586 | * clean when we restucture accept also. |
| 1587 | */ |
| 1588 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1589 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1590 | int __user *, upeer_addrlen, int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1591 | { |
| 1592 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1593 | struct file *newfile; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1594 | int err, len, newfd, fput_needed; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1595 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1597 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1598 | return -EINVAL; |
| 1599 | |
| 1600 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1601 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1602 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1603 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1604 | if (!sock) |
| 1605 | goto out; |
| 1606 | |
| 1607 | err = -ENFILE; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1608 | newsock = sock_alloc(); |
| 1609 | if (!newsock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | goto out_put; |
| 1611 | |
| 1612 | newsock->type = sock->type; |
| 1613 | newsock->ops = sock->ops; |
| 1614 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | /* |
| 1616 | * We don't need try_module_get here, as the listening socket (sock) |
| 1617 | * has the protocol module (sock->ops->owner) held. |
| 1618 | */ |
| 1619 | __module_get(newsock->ops->owner); |
| 1620 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1621 | newfd = get_unused_fd_flags(flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1622 | if (unlikely(newfd < 0)) { |
| 1623 | err = newfd; |
David S. Miller | 9a1875e | 2006-04-01 12:48:36 -0800 | [diff] [blame] | 1624 | sock_release(newsock); |
| 1625 | goto out_put; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1626 | } |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1627 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1628 | if (unlikely(IS_ERR(newfile))) { |
| 1629 | err = PTR_ERR(newfile); |
| 1630 | put_unused_fd(newfd); |
| 1631 | sock_release(newsock); |
| 1632 | goto out_put; |
| 1633 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1634 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1635 | err = security_socket_accept(sock, newsock); |
| 1636 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1637 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1638 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
| 1640 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1641 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | |
| 1643 | if (upeer_sockaddr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1644 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1645 | &len, 2) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1647 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | } |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1649 | err = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1650 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1652 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | } |
| 1654 | |
| 1655 | /* File flags are not inherited via accept() unlike another OSes. */ |
| 1656 | |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1657 | fd_install(newfd, newfile); |
| 1658 | err = newfd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1661 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | out: |
| 1663 | return err; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1664 | out_fd: |
David S. Miller | 9606a21 | 2006-04-01 01:00:14 -0800 | [diff] [blame] | 1665 | fput(newfile); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1666 | put_unused_fd(newfd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | goto out_put; |
| 1668 | } |
| 1669 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1670 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1671 | int __user *, upeer_addrlen) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1672 | { |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 1673 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1674 | } |
| 1675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | /* |
| 1677 | * Attempt to connect to a socket with the server address. The address |
| 1678 | * is in user space so we verify it is OK and move it to kernel space. |
| 1679 | * |
| 1680 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 1681 | * break bindings |
| 1682 | * |
| 1683 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 1684 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 1685 | * include the -EINPROGRESS status for such sockets. |
| 1686 | */ |
| 1687 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1688 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
| 1689 | int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | { |
| 1691 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1692 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1693 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1695 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | if (!sock) |
| 1697 | goto out; |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1698 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | if (err < 0) |
| 1700 | goto out_put; |
| 1701 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1702 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1703 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | if (err) |
| 1705 | goto out_put; |
| 1706 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1707 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | sock->file->f_flags); |
| 1709 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1710 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | out: |
| 1712 | return err; |
| 1713 | } |
| 1714 | |
| 1715 | /* |
| 1716 | * Get the local address ('name') of a socket object. Move the obtained |
| 1717 | * name to user space. |
| 1718 | */ |
| 1719 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1720 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
| 1721 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1722 | { |
| 1723 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1724 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1725 | int len, err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1726 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1727 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1728 | if (!sock) |
| 1729 | goto out; |
| 1730 | |
| 1731 | err = security_socket_getsockname(sock); |
| 1732 | if (err) |
| 1733 | goto out_put; |
| 1734 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1735 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | if (err) |
| 1737 | goto out_put; |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1738 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | |
| 1740 | out_put: |
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 | out: |
| 1743 | return err; |
| 1744 | } |
| 1745 | |
| 1746 | /* |
| 1747 | * Get the remote address ('name') of a socket object. Move the obtained |
| 1748 | * name to user space. |
| 1749 | */ |
| 1750 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1751 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
| 1752 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | { |
| 1754 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1755 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1756 | int len, err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1758 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1759 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | err = security_socket_getpeername(sock); |
| 1761 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1762 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | return err; |
| 1764 | } |
| 1765 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1766 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1767 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1768 | 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | if (!err) |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1770 | err = move_addr_to_user(&address, len, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1771 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1772 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | } |
| 1774 | return err; |
| 1775 | } |
| 1776 | |
| 1777 | /* |
| 1778 | * Send a datagram to a given address. We move the address into kernel |
| 1779 | * space and check the user space data area is readable before invoking |
| 1780 | * the protocol. |
| 1781 | */ |
| 1782 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1783 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1784 | unsigned int, flags, struct sockaddr __user *, addr, |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1785 | int, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | { |
| 1787 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1788 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | int err; |
| 1790 | struct msghdr msg; |
| 1791 | struct iovec iov; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1792 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1793 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1794 | if (len > INT_MAX) |
| 1795 | len = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1796 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1797 | if (!sock) |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1798 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1799 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1800 | iov.iov_base = buff; |
| 1801 | iov.iov_len = len; |
| 1802 | msg.msg_name = NULL; |
| 1803 | msg.msg_iov = &iov; |
| 1804 | msg.msg_iovlen = 1; |
| 1805 | msg.msg_control = NULL; |
| 1806 | msg.msg_controllen = 0; |
| 1807 | msg.msg_namelen = 0; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1808 | if (addr) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1809 | err = move_addr_to_kernel(addr, addr_len, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | if (err < 0) |
| 1811 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1812 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1813 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | } |
| 1815 | if (sock->file->f_flags & O_NONBLOCK) |
| 1816 | flags |= MSG_DONTWAIT; |
| 1817 | msg.msg_flags = flags; |
| 1818 | err = sock_sendmsg(sock, &msg, len); |
| 1819 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1820 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1821 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1822 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | return err; |
| 1824 | } |
| 1825 | |
| 1826 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1827 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | */ |
| 1829 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1830 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1831 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | { |
| 1833 | return sys_sendto(fd, buff, len, flags, NULL, 0); |
| 1834 | } |
| 1835 | |
| 1836 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1837 | * 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] | 1838 | * sender. We verify the buffers are writable and if needed move the |
| 1839 | * sender address from kernel to user space. |
| 1840 | */ |
| 1841 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1842 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1843 | unsigned int, flags, struct sockaddr __user *, addr, |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1844 | int __user *, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | { |
| 1846 | struct socket *sock; |
| 1847 | struct iovec iov; |
| 1848 | struct msghdr msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1849 | struct sockaddr_storage address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1850 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1851 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | |
Linus Torvalds | 253eacc | 2010-10-30 16:43:10 -0700 | [diff] [blame] | 1853 | if (size > INT_MAX) |
| 1854 | size = INT_MAX; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1855 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1856 | if (!sock) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1857 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1859 | msg.msg_control = NULL; |
| 1860 | msg.msg_controllen = 0; |
| 1861 | msg.msg_iovlen = 1; |
| 1862 | msg.msg_iov = &iov; |
| 1863 | iov.iov_len = size; |
| 1864 | iov.iov_base = ubuf; |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 1865 | /* Save some cycles and don't copy the address if not needed */ |
| 1866 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; |
| 1867 | /* We assume all kernel code knows the size of sockaddr_storage */ |
| 1868 | msg.msg_namelen = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1869 | if (sock->file->f_flags & O_NONBLOCK) |
| 1870 | flags |= MSG_DONTWAIT; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1871 | err = sock_recvmsg(sock, &msg, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1873 | if (err >= 0 && addr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1874 | err2 = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1875 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1876 | if (err2 < 0) |
| 1877 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1879 | |
| 1880 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1881 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | return err; |
| 1883 | } |
| 1884 | |
| 1885 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1886 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | */ |
| 1888 | |
Jan Glauber | b7c0ddf | 2014-04-16 09:32:48 +0200 | [diff] [blame] | 1889 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
| 1890 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | { |
| 1892 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
| 1893 | } |
| 1894 | |
| 1895 | /* |
| 1896 | * Set a socket option. Because we don't know the option lengths we have |
| 1897 | * to pass the user mode parameter for the protocols to sort out. |
| 1898 | */ |
| 1899 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1900 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| 1901 | char __user *, optval, int, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1903 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | struct socket *sock; |
| 1905 | |
| 1906 | if (optlen < 0) |
| 1907 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1908 | |
| 1909 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1910 | if (sock != NULL) { |
| 1911 | err = security_socket_setsockopt(sock, level, optname); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1912 | if (err) |
| 1913 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | |
| 1915 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1916 | err = |
| 1917 | sock_setsockopt(sock, level, optname, optval, |
| 1918 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1919 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1920 | err = |
| 1921 | sock->ops->setsockopt(sock, level, optname, optval, |
| 1922 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1923 | out_put: |
| 1924 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | } |
| 1926 | return err; |
| 1927 | } |
| 1928 | |
| 1929 | /* |
| 1930 | * Get a socket option. Because we don't know the option lengths we have |
| 1931 | * to pass a user mode parameter for the protocols to sort out. |
| 1932 | */ |
| 1933 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1934 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| 1935 | char __user *, optval, int __user *, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1937 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | struct socket *sock; |
| 1939 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1940 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1941 | if (sock != NULL) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1942 | err = security_socket_getsockopt(sock, level, optname); |
| 1943 | if (err) |
| 1944 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | |
| 1946 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1947 | err = |
| 1948 | sock_getsockopt(sock, level, optname, optval, |
| 1949 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1951 | err = |
| 1952 | sock->ops->getsockopt(sock, level, optname, optval, |
| 1953 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1954 | out_put: |
| 1955 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | } |
| 1957 | return err; |
| 1958 | } |
| 1959 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | /* |
| 1961 | * Shutdown a socket. |
| 1962 | */ |
| 1963 | |
Heiko Carstens | 754fe8d | 2009-01-14 14:14:09 +0100 | [diff] [blame] | 1964 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1966 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | struct socket *sock; |
| 1968 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1969 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1970 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | err = security_socket_shutdown(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1972 | if (!err) |
| 1973 | err = sock->ops->shutdown(sock, how); |
| 1974 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | } |
| 1976 | return err; |
| 1977 | } |
| 1978 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1979 | /* 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] | 1980 | * fields which are the same type (int / unsigned) on our platforms. |
| 1981 | */ |
| 1982 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 1983 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 1984 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 1985 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1986 | struct used_address { |
| 1987 | struct sockaddr_storage name; |
| 1988 | unsigned int name_len; |
| 1989 | }; |
| 1990 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1991 | static ssize_t copy_msghdr_from_user(struct msghdr *kmsg, |
| 1992 | struct user_msghdr __user *umsg, |
| 1993 | struct sockaddr __user **save_addr, |
| 1994 | struct iovec **iov) |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 1995 | { |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1996 | struct sockaddr __user *uaddr; |
| 1997 | struct iovec __user *uiov; |
| 1998 | ssize_t err; |
| 1999 | |
| 2000 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || |
| 2001 | __get_user(uaddr, &umsg->msg_name) || |
| 2002 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
| 2003 | __get_user(uiov, &umsg->msg_iov) || |
| 2004 | __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || |
| 2005 | __get_user(kmsg->msg_control, &umsg->msg_control) || |
| 2006 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || |
| 2007 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2008 | return -EFAULT; |
Matthew Leach | dbb490b | 2014-03-11 11:58:27 +0000 | [diff] [blame] | 2009 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2010 | if (!uaddr) |
Ani Sinha | 6a2a2b3 | 2014-09-08 14:49:59 -0700 | [diff] [blame] | 2011 | kmsg->msg_namelen = 0; |
| 2012 | |
Matthew Leach | dbb490b | 2014-03-11 11:58:27 +0000 | [diff] [blame] | 2013 | if (kmsg->msg_namelen < 0) |
| 2014 | return -EINVAL; |
| 2015 | |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2016 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
Dan Carpenter | db31c55 | 2013-11-27 15:40:21 +0300 | [diff] [blame] | 2017 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2018 | |
| 2019 | if (save_addr) |
| 2020 | *save_addr = uaddr; |
| 2021 | |
| 2022 | if (uaddr && kmsg->msg_namelen) { |
| 2023 | if (!save_addr) { |
| 2024 | err = move_addr_to_kernel(uaddr, kmsg->msg_namelen, |
| 2025 | kmsg->msg_name); |
| 2026 | if (err < 0) |
| 2027 | return err; |
| 2028 | } |
| 2029 | } else { |
| 2030 | kmsg->msg_name = NULL; |
| 2031 | kmsg->msg_namelen = 0; |
| 2032 | } |
| 2033 | |
| 2034 | if (kmsg->msg_iovlen > UIO_MAXIOV) |
| 2035 | return -EMSGSIZE; |
| 2036 | |
| 2037 | err = rw_copy_check_uvector(save_addr ? READ : WRITE, |
| 2038 | uiov, kmsg->msg_iovlen, |
| 2039 | UIO_FASTIOV, *iov, iov); |
| 2040 | if (err >= 0) |
| 2041 | kmsg->msg_iov = *iov; |
| 2042 | return err; |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 2043 | } |
| 2044 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2045 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2046 | struct msghdr *msg_sys, unsigned int flags, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2047 | struct used_address *used_address) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2049 | struct compat_msghdr __user *msg_compat = |
| 2050 | (struct compat_msghdr __user *)msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2051 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 2053 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2054 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
| 2055 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2056 | unsigned char *ctl_buf = ctl; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2057 | int ctl_len, total_len; |
| 2058 | ssize_t err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2059 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2060 | msg_sys->msg_name = &address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2061 | |
Al Viro | 0844932 | 2014-11-09 22:33:45 -0500 | [diff] [blame] | 2062 | if (MSG_CMSG_COMPAT & flags) |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2063 | err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov); |
Al Viro | 0844932 | 2014-11-09 22:33:45 -0500 | [diff] [blame] | 2064 | else |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2065 | err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2066 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2067 | goto out_freeiov; |
| 2068 | total_len = err; |
| 2069 | |
| 2070 | err = -ENOBUFS; |
| 2071 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2072 | if (msg_sys->msg_controllen > INT_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2074 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2075 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2076 | err = |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2077 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2078 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | if (err) |
| 2080 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2081 | ctl_buf = msg_sys->msg_control; |
| 2082 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | } else if (ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2084 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2086 | if (ctl_buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | goto out_freeiov; |
| 2088 | } |
| 2089 | err = -EFAULT; |
| 2090 | /* |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2091 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
| 2093 | * checking falls down on this. |
| 2094 | */ |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 2095 | if (copy_from_user(ctl_buf, |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2096 | (void __user __force *)msg_sys->msg_control, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2097 | ctl_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | goto out_freectl; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2099 | msg_sys->msg_control = ctl_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | } |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2101 | msg_sys->msg_flags = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | |
| 2103 | if (sock->file->f_flags & O_NONBLOCK) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2104 | msg_sys->msg_flags |= MSG_DONTWAIT; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2105 | /* |
| 2106 | * If this is sendmmsg() and current destination address is same as |
| 2107 | * previously succeeded address, omit asking LSM's decision. |
| 2108 | * used_address->name_len is initialized to UINT_MAX so that the first |
| 2109 | * destination address never matches. |
| 2110 | */ |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2111 | if (used_address && msg_sys->msg_name && |
| 2112 | used_address->name_len == msg_sys->msg_namelen && |
| 2113 | !memcmp(&used_address->name, msg_sys->msg_name, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2114 | used_address->name_len)) { |
| 2115 | err = sock_sendmsg_nosec(sock, msg_sys, total_len); |
| 2116 | goto out_freectl; |
| 2117 | } |
| 2118 | err = sock_sendmsg(sock, msg_sys, total_len); |
| 2119 | /* |
| 2120 | * If this is sendmmsg() and sending to current destination address was |
| 2121 | * successful, remember it. |
| 2122 | */ |
| 2123 | if (used_address && err >= 0) { |
| 2124 | used_address->name_len = msg_sys->msg_namelen; |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 2125 | if (msg_sys->msg_name) |
| 2126 | memcpy(&used_address->name, msg_sys->msg_name, |
| 2127 | used_address->name_len); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2128 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | |
| 2130 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2131 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
| 2133 | out_freeiov: |
| 2134 | if (iov != iovstack) |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2135 | kfree(iov); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2136 | return err; |
| 2137 | } |
| 2138 | |
| 2139 | /* |
| 2140 | * BSD sendmsg interface |
| 2141 | */ |
| 2142 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2143 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2144 | { |
| 2145 | int fput_needed, err; |
| 2146 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2147 | struct socket *sock; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2148 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2149 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2150 | if (!sock) |
| 2151 | goto out; |
| 2152 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2153 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2154 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2155 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2156 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2157 | return err; |
| 2158 | } |
| 2159 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2160 | SYSCALL_DEFINE3(sendmsg, int, fd, struct user_msghdr __user *, msg, unsigned int, flags) |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2161 | { |
| 2162 | if (flags & MSG_CMSG_COMPAT) |
| 2163 | return -EINVAL; |
| 2164 | return __sys_sendmsg(fd, msg, flags); |
| 2165 | } |
| 2166 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2167 | /* |
| 2168 | * Linux sendmmsg interface |
| 2169 | */ |
| 2170 | |
| 2171 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2172 | unsigned int flags) |
| 2173 | { |
| 2174 | int fput_needed, err, datagrams; |
| 2175 | struct socket *sock; |
| 2176 | struct mmsghdr __user *entry; |
| 2177 | struct compat_mmsghdr __user *compat_entry; |
| 2178 | struct msghdr msg_sys; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2179 | struct used_address used_address; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2180 | |
Anton Blanchard | 98382f4 | 2011-08-04 14:07:39 +0000 | [diff] [blame] | 2181 | if (vlen > UIO_MAXIOV) |
| 2182 | vlen = UIO_MAXIOV; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2183 | |
| 2184 | datagrams = 0; |
| 2185 | |
| 2186 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2187 | if (!sock) |
| 2188 | return err; |
| 2189 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2190 | used_address.name_len = UINT_MAX; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2191 | entry = mmsg; |
| 2192 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2193 | err = 0; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2194 | |
| 2195 | while (datagrams < vlen) { |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2196 | if (MSG_CMSG_COMPAT & flags) { |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2197 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2198 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2199 | if (err < 0) |
| 2200 | break; |
| 2201 | err = __put_user(err, &compat_entry->msg_len); |
| 2202 | ++compat_entry; |
| 2203 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2204 | err = ___sys_sendmsg(sock, |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2205 | (struct user_msghdr __user *)entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2206 | &msg_sys, flags, &used_address); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2207 | if (err < 0) |
| 2208 | break; |
| 2209 | err = put_user(err, &entry->msg_len); |
| 2210 | ++entry; |
| 2211 | } |
| 2212 | |
| 2213 | if (err) |
| 2214 | break; |
| 2215 | ++datagrams; |
| 2216 | } |
| 2217 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2218 | fput_light(sock->file, fput_needed); |
| 2219 | |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2220 | /* We only return an error if no datagrams were able to be sent */ |
| 2221 | if (datagrams != 0) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2222 | return datagrams; |
| 2223 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2224 | return err; |
| 2225 | } |
| 2226 | |
| 2227 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2228 | unsigned int, vlen, unsigned int, flags) |
| 2229 | { |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2230 | if (flags & MSG_CMSG_COMPAT) |
| 2231 | return -EINVAL; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2232 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
| 2233 | } |
| 2234 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2235 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2236 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2238 | struct compat_msghdr __user *msg_compat = |
| 2239 | (struct compat_msghdr __user *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2240 | struct iovec iovstack[UIO_FASTIOV]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2241 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2242 | unsigned long cmsg_ptr; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2243 | int total_len, len; |
| 2244 | ssize_t err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2245 | |
| 2246 | /* kernel mode address */ |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2247 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2248 | |
| 2249 | /* user mode address pointers */ |
| 2250 | struct sockaddr __user *uaddr; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2251 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2252 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2253 | msg_sys->msg_name = &addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2255 | if (MSG_CMSG_COMPAT & flags) |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2256 | err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov); |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2257 | else |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2258 | err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | if (err < 0) |
| 2260 | goto out_freeiov; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2261 | total_len = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2263 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
| 2264 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2265 | |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2266 | /* We assume all kernel code knows the size of sockaddr_storage */ |
| 2267 | msg_sys->msg_namelen = 0; |
| 2268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | if (sock->file->f_flags & O_NONBLOCK) |
| 2270 | flags |= MSG_DONTWAIT; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2271 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
| 2272 | total_len, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | if (err < 0) |
| 2274 | goto out_freeiov; |
| 2275 | len = err; |
| 2276 | |
| 2277 | if (uaddr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2278 | err = move_addr_to_user(&addr, |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2279 | msg_sys->msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2280 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2281 | if (err < 0) |
| 2282 | goto out_freeiov; |
| 2283 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2284 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2285 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2286 | if (err) |
| 2287 | goto out_freeiov; |
| 2288 | if (MSG_CMSG_COMPAT & flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2289 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | &msg_compat->msg_controllen); |
| 2291 | else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2292 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | &msg->msg_controllen); |
| 2294 | if (err) |
| 2295 | goto out_freeiov; |
| 2296 | err = len; |
| 2297 | |
| 2298 | out_freeiov: |
| 2299 | if (iov != iovstack) |
Eric Dumazet | a74e910 | 2012-04-20 20:04:01 +0200 | [diff] [blame] | 2300 | kfree(iov); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2301 | return err; |
| 2302 | } |
| 2303 | |
| 2304 | /* |
| 2305 | * BSD recvmsg interface |
| 2306 | */ |
| 2307 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2308 | long __sys_recvmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2309 | { |
| 2310 | int fput_needed, err; |
| 2311 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2312 | struct socket *sock; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2313 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2314 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2315 | if (!sock) |
| 2316 | goto out; |
| 2317 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2318 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2319 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2320 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2321 | out: |
| 2322 | return err; |
| 2323 | } |
| 2324 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2325 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2326 | unsigned int, flags) |
| 2327 | { |
| 2328 | if (flags & MSG_CMSG_COMPAT) |
| 2329 | return -EINVAL; |
| 2330 | return __sys_recvmsg(fd, msg, flags); |
| 2331 | } |
| 2332 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2333 | /* |
| 2334 | * Linux recvmmsg interface |
| 2335 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2336 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2337 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2338 | unsigned int flags, struct timespec *timeout) |
| 2339 | { |
| 2340 | int fput_needed, err, datagrams; |
| 2341 | struct socket *sock; |
| 2342 | struct mmsghdr __user *entry; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2343 | struct compat_mmsghdr __user *compat_entry; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2344 | struct msghdr msg_sys; |
| 2345 | struct timespec end_time; |
| 2346 | |
| 2347 | if (timeout && |
| 2348 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
| 2349 | timeout->tv_nsec)) |
| 2350 | return -EINVAL; |
| 2351 | |
| 2352 | datagrams = 0; |
| 2353 | |
| 2354 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2355 | if (!sock) |
| 2356 | return err; |
| 2357 | |
| 2358 | err = sock_error(sock->sk); |
| 2359 | if (err) |
| 2360 | goto out_put; |
| 2361 | |
| 2362 | entry = mmsg; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2363 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2364 | |
| 2365 | while (datagrams < vlen) { |
| 2366 | /* |
| 2367 | * No need to ask LSM for more than the first datagram. |
| 2368 | */ |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2369 | if (MSG_CMSG_COMPAT & flags) { |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2370 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2371 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2372 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2373 | if (err < 0) |
| 2374 | break; |
| 2375 | err = __put_user(err, &compat_entry->msg_len); |
| 2376 | ++compat_entry; |
| 2377 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2378 | err = ___sys_recvmsg(sock, |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2379 | (struct user_msghdr __user *)entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2380 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2381 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2382 | if (err < 0) |
| 2383 | break; |
| 2384 | err = put_user(err, &entry->msg_len); |
| 2385 | ++entry; |
| 2386 | } |
| 2387 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2388 | if (err) |
| 2389 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2390 | ++datagrams; |
| 2391 | |
Brandon L Black | 71c5c15 | 2010-03-26 16:18:03 +0000 | [diff] [blame] | 2392 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
| 2393 | if (flags & MSG_WAITFORONE) |
| 2394 | flags |= MSG_DONTWAIT; |
| 2395 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2396 | if (timeout) { |
| 2397 | ktime_get_ts(timeout); |
| 2398 | *timeout = timespec_sub(end_time, *timeout); |
| 2399 | if (timeout->tv_sec < 0) { |
| 2400 | timeout->tv_sec = timeout->tv_nsec = 0; |
| 2401 | break; |
| 2402 | } |
| 2403 | |
| 2404 | /* Timeout, return less than vlen datagrams */ |
| 2405 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
| 2406 | break; |
| 2407 | } |
| 2408 | |
| 2409 | /* Out of band data, return right away */ |
| 2410 | if (msg_sys.msg_flags & MSG_OOB) |
| 2411 | break; |
| 2412 | } |
| 2413 | |
| 2414 | out_put: |
| 2415 | fput_light(sock->file, fput_needed); |
| 2416 | |
| 2417 | if (err == 0) |
| 2418 | return datagrams; |
| 2419 | |
| 2420 | if (datagrams != 0) { |
| 2421 | /* |
| 2422 | * We may return less entries than requested (vlen) if the |
| 2423 | * sock is non block and there aren't enough datagrams... |
| 2424 | */ |
| 2425 | if (err != -EAGAIN) { |
| 2426 | /* |
| 2427 | * ... or if recvmsg returns an error after we |
| 2428 | * received some datagrams, where we record the |
| 2429 | * error to return on the next call or if the |
| 2430 | * app asks about it using getsockopt(SO_ERROR). |
| 2431 | */ |
| 2432 | sock->sk->sk_err = -err; |
| 2433 | } |
| 2434 | |
| 2435 | return datagrams; |
| 2436 | } |
| 2437 | |
| 2438 | return err; |
| 2439 | } |
| 2440 | |
| 2441 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2442 | unsigned int, vlen, unsigned int, flags, |
| 2443 | struct timespec __user *, timeout) |
| 2444 | { |
| 2445 | int datagrams; |
| 2446 | struct timespec timeout_sys; |
| 2447 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2448 | if (flags & MSG_CMSG_COMPAT) |
| 2449 | return -EINVAL; |
| 2450 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2451 | if (!timeout) |
| 2452 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); |
| 2453 | |
| 2454 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) |
| 2455 | return -EFAULT; |
| 2456 | |
| 2457 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
| 2458 | |
| 2459 | if (datagrams > 0 && |
| 2460 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) |
| 2461 | datagrams = -EFAULT; |
| 2462 | |
| 2463 | return datagrams; |
| 2464 | } |
| 2465 | |
| 2466 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2467 | /* Argument list sizes for sys_socketcall */ |
| 2468 | #define AL(x) ((x) * sizeof(unsigned long)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2469 | static const unsigned char nargs[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2470 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 2471 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 2472 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2473 | AL(4), AL(5), AL(4) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2474 | }; |
| 2475 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2476 | #undef AL |
| 2477 | |
| 2478 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2479 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2480 | * |
| 2481 | * Argument checking cleaned up. Saved 20% in size. |
| 2482 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2483 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2484 | */ |
| 2485 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 2486 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2487 | { |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 2488 | unsigned long a[AUDITSC_ARGS]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2489 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | int err; |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2491 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2492 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2493 | if (call < 1 || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2494 | return -EINVAL; |
| 2495 | |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2496 | len = nargs[call]; |
| 2497 | if (len > sizeof(a)) |
| 2498 | return -EINVAL; |
| 2499 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2500 | /* copy_from_user should be SMP safe. */ |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2501 | if (copy_from_user(a, args, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2502 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2503 | |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 2504 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
| 2505 | if (err) |
| 2506 | return err; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2507 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2508 | a0 = a[0]; |
| 2509 | a1 = a[1]; |
| 2510 | |
| 2511 | switch (call) { |
| 2512 | case SYS_SOCKET: |
| 2513 | err = sys_socket(a0, a1, a[2]); |
| 2514 | break; |
| 2515 | case SYS_BIND: |
| 2516 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
| 2517 | break; |
| 2518 | case SYS_CONNECT: |
| 2519 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
| 2520 | break; |
| 2521 | case SYS_LISTEN: |
| 2522 | err = sys_listen(a0, a1); |
| 2523 | break; |
| 2524 | case SYS_ACCEPT: |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2525 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2526 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2527 | break; |
| 2528 | case SYS_GETSOCKNAME: |
| 2529 | err = |
| 2530 | sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 2531 | (int __user *)a[2]); |
| 2532 | break; |
| 2533 | case SYS_GETPEERNAME: |
| 2534 | err = |
| 2535 | sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 2536 | (int __user *)a[2]); |
| 2537 | break; |
| 2538 | case SYS_SOCKETPAIR: |
| 2539 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
| 2540 | break; |
| 2541 | case SYS_SEND: |
| 2542 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); |
| 2543 | break; |
| 2544 | case SYS_SENDTO: |
| 2545 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 2546 | (struct sockaddr __user *)a[4], a[5]); |
| 2547 | break; |
| 2548 | case SYS_RECV: |
| 2549 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); |
| 2550 | break; |
| 2551 | case SYS_RECVFROM: |
| 2552 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 2553 | (struct sockaddr __user *)a[4], |
| 2554 | (int __user *)a[5]); |
| 2555 | break; |
| 2556 | case SYS_SHUTDOWN: |
| 2557 | err = sys_shutdown(a0, a1); |
| 2558 | break; |
| 2559 | case SYS_SETSOCKOPT: |
| 2560 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
| 2561 | break; |
| 2562 | case SYS_GETSOCKOPT: |
| 2563 | err = |
| 2564 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 2565 | (int __user *)a[4]); |
| 2566 | break; |
| 2567 | case SYS_SENDMSG: |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2568 | err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2569 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2570 | case SYS_SENDMMSG: |
| 2571 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); |
| 2572 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2573 | case SYS_RECVMSG: |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2574 | err = sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2575 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2576 | case SYS_RECVMMSG: |
| 2577 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], |
| 2578 | (struct timespec __user *)a[4]); |
| 2579 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2580 | case SYS_ACCEPT4: |
| 2581 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2582 | (int __user *)a[2], a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2583 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2584 | default: |
| 2585 | err = -EINVAL; |
| 2586 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2587 | } |
| 2588 | return err; |
| 2589 | } |
| 2590 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2591 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2592 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2593 | /** |
| 2594 | * sock_register - add a socket protocol handler |
| 2595 | * @ops: description of protocol |
| 2596 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2597 | * This function is called by a protocol handler that wants to |
| 2598 | * advertise its address family, and have it linked into the |
Masanari Iida | e793c0f | 2014-09-04 23:44:36 +0900 | [diff] [blame] | 2599 | * socket interface. The value ops->family corresponds to the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2600 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2602 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2603 | { |
| 2604 | int err; |
| 2605 | |
| 2606 | if (ops->family >= NPROTO) { |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 2607 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2608 | return -ENOBUFS; |
| 2609 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2610 | |
| 2611 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 2612 | if (rcu_dereference_protected(net_families[ops->family], |
| 2613 | lockdep_is_held(&net_family_lock))) |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2614 | err = -EEXIST; |
| 2615 | else { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 2616 | rcu_assign_pointer(net_families[ops->family], ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2617 | err = 0; |
| 2618 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2619 | spin_unlock(&net_family_lock); |
| 2620 | |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 2621 | pr_info("NET: Registered protocol family %d\n", ops->family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2622 | return err; |
| 2623 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2624 | EXPORT_SYMBOL(sock_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2625 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2626 | /** |
| 2627 | * sock_unregister - remove a protocol handler |
| 2628 | * @family: protocol family to remove |
| 2629 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2630 | * This function is called by a protocol handler that wants to |
| 2631 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2632 | * new socket creation. |
| 2633 | * |
| 2634 | * If protocol handler is a module, then it can use module reference |
| 2635 | * counts to protect against new references. If protocol handler is not |
| 2636 | * a module then it needs to provide its own protection in |
| 2637 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2638 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2639 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2640 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2641 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2642 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2643 | spin_lock(&net_family_lock); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 2644 | RCU_INIT_POINTER(net_families[family], NULL); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2645 | spin_unlock(&net_family_lock); |
| 2646 | |
| 2647 | synchronize_rcu(); |
| 2648 | |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 2649 | pr_info("NET: Unregistered protocol family %d\n", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2650 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2651 | EXPORT_SYMBOL(sock_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2652 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2653 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2654 | { |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2655 | int err; |
Eric W. Biederman | 2ca794e | 2012-04-19 13:20:32 +0000 | [diff] [blame] | 2656 | /* |
| 2657 | * Initialize the network sysctl infrastructure. |
| 2658 | */ |
| 2659 | err = net_sysctl_init(); |
| 2660 | if (err) |
| 2661 | goto out; |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2664 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2665 | */ |
| 2666 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | |
| 2668 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2669 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2670 | */ |
| 2671 | |
| 2672 | init_inodecache(); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2673 | |
| 2674 | err = register_filesystem(&sock_fs_type); |
| 2675 | if (err) |
| 2676 | goto out_fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2677 | sock_mnt = kern_mount(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2678 | if (IS_ERR(sock_mnt)) { |
| 2679 | err = PTR_ERR(sock_mnt); |
| 2680 | goto out_mount; |
| 2681 | } |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2682 | |
| 2683 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | */ |
| 2685 | |
| 2686 | #ifdef CONFIG_NETFILTER |
Pablo Neira Ayuso | 6d11cfd | 2013-05-22 22:42:36 +0000 | [diff] [blame] | 2687 | err = netfilter_init(); |
| 2688 | if (err) |
| 2689 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2690 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 2691 | |
Daniel Borkmann | 408eccc | 2014-04-01 16:20:23 +0200 | [diff] [blame] | 2692 | ptp_classifier_init(); |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 2693 | |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2694 | out: |
| 2695 | return err; |
| 2696 | |
| 2697 | out_mount: |
| 2698 | unregister_filesystem(&sock_fs_type); |
| 2699 | out_fs: |
| 2700 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2701 | } |
| 2702 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2703 | core_initcall(sock_init); /* early initcall */ |
| 2704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2705 | #ifdef CONFIG_PROC_FS |
| 2706 | void socket_seq_show(struct seq_file *seq) |
| 2707 | { |
| 2708 | int cpu; |
| 2709 | int counter = 0; |
| 2710 | |
KAMEZAWA Hiroyuki | 6f91204 | 2006-04-10 22:52:50 -0700 | [diff] [blame] | 2711 | for_each_possible_cpu(cpu) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2712 | counter += per_cpu(sockets_in_use, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2713 | |
| 2714 | /* It can be negative, by the way. 8) */ |
| 2715 | if (counter < 0) |
| 2716 | counter = 0; |
| 2717 | |
| 2718 | seq_printf(seq, "sockets: used %d\n", counter); |
| 2719 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2720 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2721 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2722 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2723 | static int do_siocgstamp(struct net *net, struct socket *sock, |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2724 | unsigned int cmd, void __user *up) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2725 | { |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2726 | mm_segment_t old_fs = get_fs(); |
| 2727 | struct timeval ktv; |
| 2728 | int err; |
| 2729 | |
| 2730 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2731 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2732 | set_fs(old_fs); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2733 | if (!err) |
Mikulas Patocka | ed6fe9d | 2012-09-01 12:34:07 -0400 | [diff] [blame] | 2734 | err = compat_put_timeval(&ktv, up); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2735 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2736 | return err; |
| 2737 | } |
| 2738 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2739 | static int do_siocgstampns(struct net *net, struct socket *sock, |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2740 | unsigned int cmd, void __user *up) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2741 | { |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2742 | mm_segment_t old_fs = get_fs(); |
| 2743 | struct timespec kts; |
| 2744 | int err; |
| 2745 | |
| 2746 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2747 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2748 | set_fs(old_fs); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2749 | if (!err) |
Mikulas Patocka | ed6fe9d | 2012-09-01 12:34:07 -0400 | [diff] [blame] | 2750 | err = compat_put_timespec(&kts, up); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2751 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2752 | return err; |
| 2753 | } |
| 2754 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2755 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2756 | { |
| 2757 | struct ifreq __user *uifr; |
| 2758 | int err; |
| 2759 | |
| 2760 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2761 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2762 | return -EFAULT; |
| 2763 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2764 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2765 | if (err) |
| 2766 | return err; |
| 2767 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2768 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2769 | return -EFAULT; |
| 2770 | |
| 2771 | return 0; |
| 2772 | } |
| 2773 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2774 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2775 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2776 | struct compat_ifconf ifc32; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2777 | struct ifconf ifc; |
| 2778 | struct ifconf __user *uifc; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2779 | struct compat_ifreq __user *ifr32; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2780 | struct ifreq __user *ifr; |
| 2781 | unsigned int i, j; |
| 2782 | int err; |
| 2783 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2784 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2785 | return -EFAULT; |
| 2786 | |
Mathias Krause | 43da5f2 | 2012-08-15 11:31:57 +0000 | [diff] [blame] | 2787 | memset(&ifc, 0, sizeof(ifc)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2788 | if (ifc32.ifcbuf == 0) { |
| 2789 | ifc32.ifc_len = 0; |
| 2790 | ifc.ifc_len = 0; |
| 2791 | ifc.ifc_req = NULL; |
| 2792 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); |
| 2793 | } else { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2794 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
| 2795 | sizeof(struct ifreq); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2796 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
| 2797 | ifc.ifc_len = len; |
| 2798 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); |
| 2799 | ifr32 = compat_ptr(ifc32.ifcbuf); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2800 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2801 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2802 | return -EFAULT; |
| 2803 | ifr++; |
| 2804 | ifr32++; |
| 2805 | } |
| 2806 | } |
| 2807 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) |
| 2808 | return -EFAULT; |
| 2809 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2810 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2811 | if (err) |
| 2812 | return err; |
| 2813 | |
| 2814 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) |
| 2815 | return -EFAULT; |
| 2816 | |
| 2817 | ifr = ifc.ifc_req; |
| 2818 | ifr32 = compat_ptr(ifc32.ifcbuf); |
| 2819 | for (i = 0, j = 0; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2820 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
| 2821 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { |
| 2822 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2823 | return -EFAULT; |
| 2824 | ifr32++; |
| 2825 | ifr++; |
| 2826 | } |
| 2827 | |
| 2828 | if (ifc32.ifcbuf == 0) { |
| 2829 | /* Translate from 64-bit structure multiple to |
| 2830 | * a 32-bit one. |
| 2831 | */ |
| 2832 | i = ifc.ifc_len; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2833 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2834 | ifc32.ifc_len = i; |
| 2835 | } else { |
| 2836 | ifc32.ifc_len = i; |
| 2837 | } |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2838 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2839 | return -EFAULT; |
| 2840 | |
| 2841 | return 0; |
| 2842 | } |
| 2843 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2844 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2845 | { |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2846 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
| 2847 | bool convert_in = false, convert_out = false; |
| 2848 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); |
| 2849 | struct ethtool_rxnfc __user *rxnfc; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2850 | struct ifreq __user *ifr; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2851 | u32 rule_cnt = 0, actual_rule_cnt; |
| 2852 | u32 ethcmd; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2853 | u32 data; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2854 | int ret; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2855 | |
| 2856 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2857 | return -EFAULT; |
| 2858 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2859 | compat_rxnfc = compat_ptr(data); |
| 2860 | |
| 2861 | if (get_user(ethcmd, &compat_rxnfc->cmd)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2862 | return -EFAULT; |
| 2863 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2864 | /* Most ethtool structures are defined without padding. |
| 2865 | * Unfortunately struct ethtool_rxnfc is an exception. |
| 2866 | */ |
| 2867 | switch (ethcmd) { |
| 2868 | default: |
| 2869 | break; |
| 2870 | case ETHTOOL_GRXCLSRLALL: |
| 2871 | /* Buffer size is variable */ |
| 2872 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) |
| 2873 | return -EFAULT; |
| 2874 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) |
| 2875 | return -ENOMEM; |
| 2876 | buf_size += rule_cnt * sizeof(u32); |
| 2877 | /* fall through */ |
| 2878 | case ETHTOOL_GRXRINGS: |
| 2879 | case ETHTOOL_GRXCLSRLCNT: |
| 2880 | case ETHTOOL_GRXCLSRULE: |
Ben Hutchings | 55664f3 | 2012-01-03 12:04:51 +0000 | [diff] [blame] | 2881 | case ETHTOOL_SRXCLSRLINS: |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2882 | convert_out = true; |
| 2883 | /* fall through */ |
| 2884 | case ETHTOOL_SRXCLSRLDEL: |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2885 | buf_size += sizeof(struct ethtool_rxnfc); |
| 2886 | convert_in = true; |
| 2887 | break; |
| 2888 | } |
| 2889 | |
| 2890 | ifr = compat_alloc_user_space(buf_size); |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2891 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2892 | |
| 2893 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2894 | return -EFAULT; |
| 2895 | |
| 2896 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
| 2897 | &ifr->ifr_ifru.ifru_data)) |
| 2898 | return -EFAULT; |
| 2899 | |
| 2900 | if (convert_in) { |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2901 | /* We expect there to be holes between fs.m_ext and |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2902 | * fs.ring_cookie and at the end of fs, but nowhere else. |
| 2903 | */ |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2904 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
| 2905 | sizeof(compat_rxnfc->fs.m_ext) != |
| 2906 | offsetof(struct ethtool_rxnfc, fs.m_ext) + |
| 2907 | sizeof(rxnfc->fs.m_ext)); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2908 | BUILD_BUG_ON( |
| 2909 | offsetof(struct compat_ethtool_rxnfc, fs.location) - |
| 2910 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != |
| 2911 | offsetof(struct ethtool_rxnfc, fs.location) - |
| 2912 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); |
| 2913 | |
| 2914 | if (copy_in_user(rxnfc, compat_rxnfc, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2915 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
| 2916 | (void __user *)rxnfc) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2917 | copy_in_user(&rxnfc->fs.ring_cookie, |
| 2918 | &compat_rxnfc->fs.ring_cookie, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2919 | (void __user *)(&rxnfc->fs.location + 1) - |
| 2920 | (void __user *)&rxnfc->fs.ring_cookie) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2921 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
| 2922 | sizeof(rxnfc->rule_cnt))) |
| 2923 | return -EFAULT; |
| 2924 | } |
| 2925 | |
| 2926 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); |
| 2927 | if (ret) |
| 2928 | return ret; |
| 2929 | |
| 2930 | if (convert_out) { |
| 2931 | if (copy_in_user(compat_rxnfc, rxnfc, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2932 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
| 2933 | (const void __user *)rxnfc) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2934 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
| 2935 | &rxnfc->fs.ring_cookie, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2936 | (const void __user *)(&rxnfc->fs.location + 1) - |
| 2937 | (const void __user *)&rxnfc->fs.ring_cookie) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2938 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
| 2939 | sizeof(rxnfc->rule_cnt))) |
| 2940 | return -EFAULT; |
| 2941 | |
| 2942 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { |
| 2943 | /* As an optimisation, we only copy the actual |
| 2944 | * number of rules that the underlying |
| 2945 | * function returned. Since Mallory might |
| 2946 | * change the rule count in user memory, we |
| 2947 | * check that it is less than the rule count |
| 2948 | * originally given (as the user buffer size), |
| 2949 | * which has been range-checked. |
| 2950 | */ |
| 2951 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) |
| 2952 | return -EFAULT; |
| 2953 | if (actual_rule_cnt < rule_cnt) |
| 2954 | rule_cnt = actual_rule_cnt; |
| 2955 | if (copy_in_user(&compat_rxnfc->rule_locs[0], |
| 2956 | &rxnfc->rule_locs[0], |
| 2957 | rule_cnt * sizeof(u32))) |
| 2958 | return -EFAULT; |
| 2959 | } |
| 2960 | } |
| 2961 | |
| 2962 | return 0; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2963 | } |
| 2964 | |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2965 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
| 2966 | { |
| 2967 | void __user *uptr; |
| 2968 | compat_uptr_t uptr32; |
| 2969 | struct ifreq __user *uifr; |
| 2970 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2971 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2972 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 2973 | return -EFAULT; |
| 2974 | |
| 2975 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
| 2976 | return -EFAULT; |
| 2977 | |
| 2978 | uptr = compat_ptr(uptr32); |
| 2979 | |
| 2980 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) |
| 2981 | return -EFAULT; |
| 2982 | |
| 2983 | return dev_ioctl(net, SIOCWANDEV, uifr); |
| 2984 | } |
| 2985 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2986 | static int bond_ioctl(struct net *net, unsigned int cmd, |
| 2987 | struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2988 | { |
| 2989 | struct ifreq kifr; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2990 | mm_segment_t old_fs; |
| 2991 | int err; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2992 | |
| 2993 | switch (cmd) { |
| 2994 | case SIOCBONDENSLAVE: |
| 2995 | case SIOCBONDRELEASE: |
| 2996 | case SIOCBONDSETHWADDR: |
| 2997 | case SIOCBONDCHANGEACTIVE: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2998 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2999 | return -EFAULT; |
| 3000 | |
| 3001 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3002 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3003 | err = dev_ioctl(net, cmd, |
| 3004 | (struct ifreq __user __force *) &kifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3005 | set_fs(old_fs); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3006 | |
| 3007 | return err; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3008 | default: |
Linus Torvalds | 07d106d | 2012-01-05 15:40:12 -0800 | [diff] [blame] | 3009 | return -ENOIOCTLCMD; |
Joe Perches | ccbd6a5 | 2010-05-14 10:58:26 +0000 | [diff] [blame] | 3010 | } |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3011 | } |
| 3012 | |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3013 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
| 3014 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3015 | struct compat_ifreq __user *u_ifreq32) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3016 | { |
| 3017 | struct ifreq __user *u_ifreq64; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3018 | char tmp_buf[IFNAMSIZ]; |
| 3019 | void __user *data64; |
| 3020 | u32 data32; |
| 3021 | |
| 3022 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), |
| 3023 | IFNAMSIZ)) |
| 3024 | return -EFAULT; |
Ben Hutchings | 417c352 | 2013-11-18 17:04:58 +0000 | [diff] [blame] | 3025 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3026 | return -EFAULT; |
| 3027 | data64 = compat_ptr(data32); |
| 3028 | |
| 3029 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); |
| 3030 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3031 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
| 3032 | IFNAMSIZ)) |
| 3033 | return -EFAULT; |
Ben Hutchings | 417c352 | 2013-11-18 17:04:58 +0000 | [diff] [blame] | 3034 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 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 | |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3114 | struct rtentry32 { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3115 | u32 rt_pad1; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3116 | struct sockaddr rt_dst; /* target address */ |
| 3117 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ |
| 3118 | struct sockaddr rt_genmask; /* target network mask (IP) */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3119 | unsigned short rt_flags; |
| 3120 | short rt_pad2; |
| 3121 | u32 rt_pad3; |
| 3122 | unsigned char rt_tos; |
| 3123 | unsigned char rt_class; |
| 3124 | short rt_pad4; |
| 3125 | short rt_metric; /* +1 for binary compatibility! */ |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3126 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3127 | u32 rt_mtu; /* per route MTU/Window */ |
| 3128 | u32 rt_window; /* Window clamping */ |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3129 | unsigned short rt_irtt; /* Initial RTT */ |
| 3130 | }; |
| 3131 | |
| 3132 | struct in6_rtmsg32 { |
| 3133 | struct in6_addr rtmsg_dst; |
| 3134 | struct in6_addr rtmsg_src; |
| 3135 | struct in6_addr rtmsg_gateway; |
| 3136 | u32 rtmsg_type; |
| 3137 | u16 rtmsg_dst_len; |
| 3138 | u16 rtmsg_src_len; |
| 3139 | u32 rtmsg_metric; |
| 3140 | u32 rtmsg_info; |
| 3141 | u32 rtmsg_flags; |
| 3142 | s32 rtmsg_ifindex; |
| 3143 | }; |
| 3144 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3145 | static int routing_ioctl(struct net *net, struct socket *sock, |
| 3146 | unsigned int cmd, void __user *argp) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3147 | { |
| 3148 | int ret; |
| 3149 | void *r = NULL; |
| 3150 | struct in6_rtmsg r6; |
| 3151 | struct rtentry r4; |
| 3152 | char devname[16]; |
| 3153 | u32 rtdev; |
| 3154 | mm_segment_t old_fs = get_fs(); |
| 3155 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3156 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
| 3157 | struct in6_rtmsg32 __user *ur6 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3158 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3159 | 3 * sizeof(struct in6_addr)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 3160 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
| 3161 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); |
| 3162 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); |
| 3163 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); |
| 3164 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); |
| 3165 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); |
| 3166 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3167 | |
| 3168 | r = (void *) &r6; |
| 3169 | } else { /* ipv4 */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3170 | struct rtentry32 __user *ur4 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3171 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3172 | 3 * sizeof(struct sockaddr)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 3173 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
| 3174 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); |
| 3175 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); |
| 3176 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); |
| 3177 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); |
| 3178 | ret |= get_user(rtdev, &(ur4->rt_dev)); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3179 | if (rtdev) { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3180 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3181 | r4.rt_dev = (char __user __force *)devname; |
| 3182 | devname[15] = 0; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3183 | } else |
| 3184 | r4.rt_dev = NULL; |
| 3185 | |
| 3186 | r = (void *) &r4; |
| 3187 | } |
| 3188 | |
| 3189 | if (ret) { |
| 3190 | ret = -EFAULT; |
| 3191 | goto out; |
| 3192 | } |
| 3193 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3194 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3195 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3196 | set_fs(old_fs); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3197 | |
| 3198 | out: |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3199 | return ret; |
| 3200 | } |
| 3201 | |
| 3202 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE |
| 3203 | * 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] | 3204 | * use compatible ioctls |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3205 | */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3206 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3207 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3208 | compat_ulong_t tmp; |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3209 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3210 | if (get_user(tmp, argp)) |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3211 | return -EFAULT; |
| 3212 | if (tmp == BRCTL_GET_VERSION) |
| 3213 | return BRCTL_VERSION + 1; |
| 3214 | return -EINVAL; |
| 3215 | } |
| 3216 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3217 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
| 3218 | unsigned int cmd, unsigned long arg) |
| 3219 | { |
| 3220 | void __user *argp = compat_ptr(arg); |
| 3221 | struct sock *sk = sock->sk; |
| 3222 | struct net *net = sock_net(sk); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3223 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3224 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3225 | return compat_ifr_data_ioctl(net, cmd, argp); |
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 | switch (cmd) { |
| 3228 | case SIOCSIFBR: |
| 3229 | case SIOCGIFBR: |
| 3230 | return old_bridge_ioctl(argp); |
| 3231 | case SIOCGIFNAME: |
| 3232 | return dev_ifname32(net, argp); |
| 3233 | case SIOCGIFCONF: |
| 3234 | return dev_ifconf(net, argp); |
| 3235 | case SIOCETHTOOL: |
| 3236 | return ethtool_ioctl(net, argp); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3237 | case SIOCWANDEV: |
| 3238 | return compat_siocwandev(net, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3239 | case SIOCGIFMAP: |
| 3240 | case SIOCSIFMAP: |
| 3241 | return compat_sioc_ifmap(net, cmd, argp); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3242 | case SIOCBONDENSLAVE: |
| 3243 | case SIOCBONDRELEASE: |
| 3244 | case SIOCBONDSETHWADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3245 | case SIOCBONDCHANGEACTIVE: |
| 3246 | return bond_ioctl(net, cmd, argp); |
| 3247 | case SIOCADDRT: |
| 3248 | case SIOCDELRT: |
| 3249 | return routing_ioctl(net, sock, cmd, argp); |
| 3250 | case SIOCGSTAMP: |
| 3251 | return do_siocgstamp(net, sock, cmd, argp); |
| 3252 | case SIOCGSTAMPNS: |
| 3253 | return do_siocgstampns(net, sock, cmd, argp); |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3254 | case SIOCBONDSLAVEINFOQUERY: |
| 3255 | case SIOCBONDINFOQUERY: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3256 | case SIOCSHWTSTAMP: |
Ben Hutchings | fd468c7 | 2013-11-14 01:19:29 +0000 | [diff] [blame] | 3257 | case SIOCGHWTSTAMP: |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3258 | return compat_ifr_data_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3259 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3260 | case FIOSETOWN: |
| 3261 | case SIOCSPGRP: |
| 3262 | case FIOGETOWN: |
| 3263 | case SIOCGPGRP: |
| 3264 | case SIOCBRADDBR: |
| 3265 | case SIOCBRDELBR: |
| 3266 | case SIOCGIFVLAN: |
| 3267 | case SIOCSIFVLAN: |
| 3268 | case SIOCADDDLCI: |
| 3269 | case SIOCDELDLCI: |
| 3270 | return sock_ioctl(file, cmd, arg); |
| 3271 | |
| 3272 | case SIOCGIFFLAGS: |
| 3273 | case SIOCSIFFLAGS: |
| 3274 | case SIOCGIFMETRIC: |
| 3275 | case SIOCSIFMETRIC: |
| 3276 | case SIOCGIFMTU: |
| 3277 | case SIOCSIFMTU: |
| 3278 | case SIOCGIFMEM: |
| 3279 | case SIOCSIFMEM: |
| 3280 | case SIOCGIFHWADDR: |
| 3281 | case SIOCSIFHWADDR: |
| 3282 | case SIOCADDMULTI: |
| 3283 | case SIOCDELMULTI: |
| 3284 | case SIOCGIFINDEX: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3285 | case SIOCGIFADDR: |
| 3286 | case SIOCSIFADDR: |
| 3287 | case SIOCSIFHWBROADCAST: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3288 | case SIOCDIFADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3289 | case SIOCGIFBRDADDR: |
| 3290 | case SIOCSIFBRDADDR: |
| 3291 | case SIOCGIFDSTADDR: |
| 3292 | case SIOCSIFDSTADDR: |
| 3293 | case SIOCGIFNETMASK: |
| 3294 | case SIOCSIFNETMASK: |
| 3295 | case SIOCSIFPFLAGS: |
| 3296 | case SIOCGIFPFLAGS: |
| 3297 | case SIOCGIFTXQLEN: |
| 3298 | case SIOCSIFTXQLEN: |
| 3299 | case SIOCBRADDIF: |
| 3300 | case SIOCBRDELIF: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3301 | case SIOCSIFNAME: |
| 3302 | case SIOCGMIIPHY: |
| 3303 | case SIOCGMIIREG: |
| 3304 | case SIOCSMIIREG: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3305 | return dev_ifsioc(net, sock, cmd, argp); |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3306 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3307 | case SIOCSARP: |
| 3308 | case SIOCGARP: |
| 3309 | case SIOCDARP: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3310 | case SIOCATMARK: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3311 | return sock_do_ioctl(net, sock, cmd, arg); |
| 3312 | } |
| 3313 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3314 | return -ENOIOCTLCMD; |
| 3315 | } |
Arnd Bergmann | 7a22938 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3316 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 3317 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3318 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3319 | { |
| 3320 | struct socket *sock = file->private_data; |
| 3321 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3322 | struct sock *sk; |
| 3323 | struct net *net; |
| 3324 | |
| 3325 | sk = sock->sk; |
| 3326 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3327 | |
| 3328 | if (sock->ops->compat_ioctl) |
| 3329 | ret = sock->ops->compat_ioctl(sock, cmd, arg); |
| 3330 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3331 | if (ret == -ENOIOCTLCMD && |
| 3332 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 3333 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 3334 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3335 | if (ret == -ENOIOCTLCMD) |
| 3336 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
| 3337 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3338 | return ret; |
| 3339 | } |
| 3340 | #endif |
| 3341 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3342 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 3343 | { |
| 3344 | return sock->ops->bind(sock, addr, addrlen); |
| 3345 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3346 | EXPORT_SYMBOL(kernel_bind); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3347 | |
| 3348 | int kernel_listen(struct socket *sock, int backlog) |
| 3349 | { |
| 3350 | return sock->ops->listen(sock, backlog); |
| 3351 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3352 | EXPORT_SYMBOL(kernel_listen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3353 | |
| 3354 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 3355 | { |
| 3356 | struct sock *sk = sock->sk; |
| 3357 | int err; |
| 3358 | |
| 3359 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 3360 | newsock); |
| 3361 | if (err < 0) |
| 3362 | goto done; |
| 3363 | |
| 3364 | err = sock->ops->accept(sock, *newsock, flags); |
| 3365 | if (err < 0) { |
| 3366 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 3367 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3368 | goto done; |
| 3369 | } |
| 3370 | |
| 3371 | (*newsock)->ops = sock->ops; |
Wei Yongjun | 1b08534 | 2008-12-18 19:35:10 -0800 | [diff] [blame] | 3372 | __module_get((*newsock)->ops->owner); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3373 | |
| 3374 | done: |
| 3375 | return err; |
| 3376 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3377 | EXPORT_SYMBOL(kernel_accept); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3378 | |
| 3379 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 3380 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3381 | { |
| 3382 | return sock->ops->connect(sock, addr, addrlen, flags); |
| 3383 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3384 | EXPORT_SYMBOL(kernel_connect); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3385 | |
| 3386 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
| 3387 | int *addrlen) |
| 3388 | { |
| 3389 | return sock->ops->getname(sock, addr, addrlen, 0); |
| 3390 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3391 | EXPORT_SYMBOL(kernel_getsockname); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3392 | |
| 3393 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
| 3394 | int *addrlen) |
| 3395 | { |
| 3396 | return sock->ops->getname(sock, addr, addrlen, 1); |
| 3397 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3398 | EXPORT_SYMBOL(kernel_getpeername); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3399 | |
| 3400 | int kernel_getsockopt(struct socket *sock, int level, int optname, |
| 3401 | char *optval, int *optlen) |
| 3402 | { |
| 3403 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3404 | char __user *uoptval; |
| 3405 | int __user *uoptlen; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3406 | int err; |
| 3407 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3408 | uoptval = (char __user __force *) optval; |
| 3409 | uoptlen = (int __user __force *) optlen; |
| 3410 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3411 | set_fs(KERNEL_DS); |
| 3412 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3413 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3414 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3415 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
| 3416 | uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3417 | set_fs(oldfs); |
| 3418 | return err; |
| 3419 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3420 | EXPORT_SYMBOL(kernel_getsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3421 | |
| 3422 | int kernel_setsockopt(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3423 | char *optval, unsigned int optlen) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3424 | { |
| 3425 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3426 | char __user *uoptval; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3427 | int err; |
| 3428 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3429 | uoptval = (char __user __force *) optval; |
| 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_setsockopt(sock, level, optname, uoptval, optlen); |
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->setsockopt(sock, level, optname, uoptval, |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3436 | optlen); |
| 3437 | set_fs(oldfs); |
| 3438 | return err; |
| 3439 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3440 | EXPORT_SYMBOL(kernel_setsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3441 | |
| 3442 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
| 3443 | size_t size, int flags) |
| 3444 | { |
| 3445 | if (sock->ops->sendpage) |
| 3446 | return sock->ops->sendpage(sock, page, offset, size, flags); |
| 3447 | |
| 3448 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 3449 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3450 | EXPORT_SYMBOL(kernel_sendpage); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3451 | |
| 3452 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
| 3453 | { |
| 3454 | mm_segment_t oldfs = get_fs(); |
| 3455 | int err; |
| 3456 | |
| 3457 | set_fs(KERNEL_DS); |
| 3458 | err = sock->ops->ioctl(sock, cmd, arg); |
| 3459 | set_fs(oldfs); |
| 3460 | |
| 3461 | return err; |
| 3462 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3463 | EXPORT_SYMBOL(kernel_sock_ioctl); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3464 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3465 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 3466 | { |
| 3467 | return sock->ops->shutdown(sock, how); |
| 3468 | } |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3469 | EXPORT_SYMBOL(kernel_sock_shutdown); |