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> |
Jeremy Cline | 9a492f8 | 2018-07-27 22:43:01 +0000 | [diff] [blame] | 92 | #include <linux/nospec.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | #include <asm/uaccess.h> |
| 95 | #include <asm/unistd.h> |
| 96 | |
| 97 | #include <net/compat.h> |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 98 | #include <net/wext.h> |
Herbert Xu | f845172 | 2010-05-24 00:12:34 -0700 | [diff] [blame] | 99 | #include <net/cls_cgroup.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
| 101 | #include <net/sock.h> |
| 102 | #include <linux/netfilter.h> |
| 103 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 104 | #include <linux/if_tun.h> |
| 105 | #include <linux/ipv6_route.h> |
| 106 | #include <linux/route.h> |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 107 | #include <linux/sockios.h> |
| 108 | #include <linux/atalk.h> |
Eliezer Tamir | 076bb0c | 2013-07-10 17:13:17 +0300 | [diff] [blame] | 109 | #include <net/busy_poll.h> |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 110 | #include <linux/errqueue.h> |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 111 | |
Cong Wang | e0d1095 | 2013-08-01 11:10:25 +0800 | [diff] [blame] | 112 | #ifdef CONFIG_NET_RX_BUSY_POLL |
Eliezer Tamir | 64b0dc5 | 2013-07-10 17:13:36 +0300 | [diff] [blame] | 113 | unsigned int sysctl_net_busy_read __read_mostly; |
| 114 | unsigned int sysctl_net_busy_poll __read_mostly; |
Eliezer Tamir | 0602129 | 2013-06-10 11:39:50 +0300 | [diff] [blame] | 115 | #endif |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 116 | |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 117 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to); |
| 118 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 119 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
| 121 | static int sock_close(struct inode *inode, struct file *file); |
| 122 | static unsigned int sock_poll(struct file *file, |
| 123 | struct poll_table_struct *wait); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 124 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 125 | #ifdef CONFIG_COMPAT |
| 126 | static long compat_sock_ioctl(struct file *file, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 127 | unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 128 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | static int sock_fasync(int fd, struct file *filp, int on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 130 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 131 | int offset, size_t size, loff_t *ppos, int more); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 132 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 133 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 134 | unsigned int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | /* |
| 137 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear |
| 138 | * in the operation structures but are done directly via the socketcall() multiplexor. |
| 139 | */ |
| 140 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 141 | static const struct file_operations socket_file_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | .owner = THIS_MODULE, |
| 143 | .llseek = no_llseek, |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 144 | .read_iter = sock_read_iter, |
| 145 | .write_iter = sock_write_iter, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | .poll = sock_poll, |
| 147 | .unlocked_ioctl = sock_ioctl, |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 148 | #ifdef CONFIG_COMPAT |
| 149 | .compat_ioctl = compat_sock_ioctl, |
| 150 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | .mmap = sock_mmap, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | .release = sock_close, |
| 153 | .fasync = sock_fasync, |
Jens Axboe | 5274f05 | 2006-03-30 15:15:30 +0200 | [diff] [blame] | 154 | .sendpage = sock_sendpage, |
| 155 | .splice_write = generic_splice_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 156 | .splice_read = sock_splice_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | }; |
| 158 | |
| 159 | /* |
| 160 | * The protocol list. Each protocol is registered in here. |
| 161 | */ |
| 162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | static DEFINE_SPINLOCK(net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 164 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | /* |
| 167 | * Statistics counters of the socket lists |
| 168 | */ |
| 169 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 170 | static DEFINE_PER_CPU(int, sockets_in_use); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 173 | * Support routines. |
| 174 | * Move socket addresses back and forth across the kernel/user |
| 175 | * divide and look after the messy bits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | */ |
| 177 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | /** |
| 179 | * move_addr_to_kernel - copy a socket address into kernel space |
| 180 | * @uaddr: Address in user space |
| 181 | * @kaddr: Address in kernel space |
| 182 | * @ulen: Length in user space |
| 183 | * |
| 184 | * The address is copied into kernel space. If the provided address is |
| 185 | * too long an error code of -EINVAL is returned. If the copy gives |
| 186 | * invalid addresses -EFAULT is returned. On a success 0 is returned. |
| 187 | */ |
| 188 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 189 | 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] | 190 | { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 191 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 193 | if (ulen == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | return 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 195 | if (copy_from_user(kaddr, uaddr, ulen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 197 | return audit_sockaddr(ulen, kaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | /** |
| 201 | * move_addr_to_user - copy an address to user space |
| 202 | * @kaddr: kernel space address |
| 203 | * @klen: length of address in kernel |
| 204 | * @uaddr: user space address |
| 205 | * @ulen: pointer to user length field |
| 206 | * |
| 207 | * The value pointed to by ulen on entry is the buffer length available. |
| 208 | * This is overwritten with the buffer space used. -EINVAL is returned |
| 209 | * if an overlong buffer is specified or a negative buffer size. -EFAULT |
| 210 | * is returned if either the buffer or the length field are not |
| 211 | * accessible. |
| 212 | * After copying the data up to the limit the user specifies, the true |
| 213 | * length of the data is written over the length limit the user |
| 214 | * specified. Zero is returned for a success. |
| 215 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 216 | |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 217 | static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 218 | void __user *uaddr, int __user *ulen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | { |
| 220 | int err; |
| 221 | int len; |
| 222 | |
Hannes Frederic Sowa | 68c6beb | 2013-11-21 03:14:34 +0100 | [diff] [blame] | 223 | BUG_ON(klen > sizeof(struct sockaddr_storage)); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 224 | err = get_user(len, ulen); |
| 225 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 227 | if (len > klen) |
| 228 | len = klen; |
Hannes Frederic Sowa | 68c6beb | 2013-11-21 03:14:34 +0100 | [diff] [blame] | 229 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 231 | if (len) { |
Steve Grubb | d6fe394 | 2006-03-30 12:20:22 -0500 | [diff] [blame] | 232 | if (audit_sockaddr(klen, kaddr)) |
| 233 | return -ENOMEM; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 234 | if (copy_to_user(uaddr, kaddr, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | return -EFAULT; |
| 236 | } |
| 237 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 238 | * "fromlen shall refer to the value before truncation.." |
| 239 | * 1003.1g |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | */ |
| 241 | return __put_user(klen, ulen); |
| 242 | } |
| 243 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 244 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | |
| 246 | static struct inode *sock_alloc_inode(struct super_block *sb) |
| 247 | { |
| 248 | struct socket_alloc *ei; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 249 | struct socket_wq *wq; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 250 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 251 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | if (!ei) |
| 253 | return NULL; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 254 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
| 255 | if (!wq) { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 256 | kmem_cache_free(sock_inode_cachep, ei); |
| 257 | return NULL; |
| 258 | } |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 259 | init_waitqueue_head(&wq->wait); |
| 260 | wq->fasync_list = NULL; |
Nicolai Stange | 574aab1 | 2015-12-29 13:29:55 +0100 | [diff] [blame] | 261 | wq->flags = 0; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 262 | RCU_INIT_POINTER(ei->socket.wq, wq); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 263 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | ei->socket.state = SS_UNCONNECTED; |
| 265 | ei->socket.flags = 0; |
| 266 | ei->socket.ops = NULL; |
| 267 | ei->socket.sk = NULL; |
| 268 | ei->socket.file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | |
| 270 | return &ei->vfs_inode; |
| 271 | } |
| 272 | |
| 273 | static void sock_destroy_inode(struct inode *inode) |
| 274 | { |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 275 | struct socket_alloc *ei; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 276 | struct socket_wq *wq; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 277 | |
| 278 | ei = container_of(inode, struct socket_alloc, vfs_inode); |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 279 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
Lai Jiangshan | 6184522 | 2011-03-18 12:10:25 +0800 | [diff] [blame] | 280 | kfree_rcu(wq, rcu); |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 281 | kmem_cache_free(sock_inode_cachep, ei); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 284 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 286 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 288 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | static int init_inodecache(void) |
| 292 | { |
| 293 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 294 | sizeof(struct socket_alloc), |
| 295 | 0, |
| 296 | (SLAB_HWCACHE_ALIGN | |
| 297 | SLAB_RECLAIM_ACCOUNT | |
Vladimir Davydov | 5d09705 | 2016-01-14 15:18:21 -0800 | [diff] [blame] | 298 | SLAB_MEM_SPREAD | SLAB_ACCOUNT), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 299 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | if (sock_inode_cachep == NULL) |
| 301 | return -ENOMEM; |
| 302 | return 0; |
| 303 | } |
| 304 | |
Alexey Dobriyan | b87221d | 2009-09-21 17:01:09 -0700 | [diff] [blame] | 305 | static const struct super_operations sockfs_ops = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 306 | .alloc_inode = sock_alloc_inode, |
| 307 | .destroy_inode = sock_destroy_inode, |
| 308 | .statfs = simple_statfs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | }; |
| 310 | |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 311 | /* |
| 312 | * sockfs_dname() is called from d_path(). |
| 313 | */ |
| 314 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) |
| 315 | { |
| 316 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", |
David Howells | c5ef603 | 2015-03-17 22:26:16 +0000 | [diff] [blame] | 317 | d_inode(dentry)->i_ino); |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 318 | } |
| 319 | |
Al Viro | 3ba13d1 | 2009-02-20 06:02:22 +0000 | [diff] [blame] | 320 | static const struct dentry_operations sockfs_dentry_operations = { |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 321 | .d_dname = sockfs_dname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | }; |
| 323 | |
Andreas Gruenbacher | bba0bd3 | 2016-09-29 17:48:35 +0200 | [diff] [blame] | 324 | static int sockfs_xattr_get(const struct xattr_handler *handler, |
| 325 | struct dentry *dentry, struct inode *inode, |
| 326 | const char *suffix, void *value, size_t size) |
| 327 | { |
| 328 | if (value) { |
| 329 | if (dentry->d_name.len + 1 > size) |
| 330 | return -ERANGE; |
| 331 | memcpy(value, dentry->d_name.name, dentry->d_name.len + 1); |
| 332 | } |
| 333 | return dentry->d_name.len + 1; |
| 334 | } |
| 335 | |
| 336 | #define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" |
| 337 | #define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) |
| 338 | #define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) |
| 339 | |
| 340 | static const struct xattr_handler sockfs_xattr_handler = { |
| 341 | .name = XATTR_NAME_SOCKPROTONAME, |
| 342 | .get = sockfs_xattr_get, |
| 343 | }; |
| 344 | |
Andreas Gruenbacher | 4a59015 | 2016-11-13 21:23:34 +0100 | [diff] [blame] | 345 | static int sockfs_security_xattr_set(const struct xattr_handler *handler, |
| 346 | struct dentry *dentry, struct inode *inode, |
| 347 | const char *suffix, const void *value, |
| 348 | size_t size, int flags) |
| 349 | { |
| 350 | /* Handled by LSM. */ |
| 351 | return -EAGAIN; |
| 352 | } |
| 353 | |
| 354 | static const struct xattr_handler sockfs_security_xattr_handler = { |
| 355 | .prefix = XATTR_SECURITY_PREFIX, |
| 356 | .set = sockfs_security_xattr_set, |
| 357 | }; |
| 358 | |
Andreas Gruenbacher | bba0bd3 | 2016-09-29 17:48:35 +0200 | [diff] [blame] | 359 | static const struct xattr_handler *sockfs_xattr_handlers[] = { |
| 360 | &sockfs_xattr_handler, |
Andreas Gruenbacher | 4a59015 | 2016-11-13 21:23:34 +0100 | [diff] [blame] | 361 | &sockfs_security_xattr_handler, |
Andreas Gruenbacher | bba0bd3 | 2016-09-29 17:48:35 +0200 | [diff] [blame] | 362 | NULL |
| 363 | }; |
| 364 | |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 365 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
| 366 | int flags, const char *dev_name, void *data) |
| 367 | { |
Andreas Gruenbacher | bba0bd3 | 2016-09-29 17:48:35 +0200 | [diff] [blame] | 368 | return mount_pseudo_xattr(fs_type, "socket:", &sockfs_ops, |
| 369 | sockfs_xattr_handlers, |
| 370 | &sockfs_dentry_operations, SOCKFS_MAGIC); |
Al Viro | c74a1cb | 2011-01-12 16:59:34 -0500 | [diff] [blame] | 371 | } |
| 372 | |
| 373 | static struct vfsmount *sock_mnt __read_mostly; |
| 374 | |
| 375 | static struct file_system_type sock_fs_type = { |
| 376 | .name = "sockfs", |
| 377 | .mount = sockfs_mount, |
| 378 | .kill_sb = kill_anon_super, |
| 379 | }; |
| 380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | /* |
| 382 | * Obtains the first available file descriptor and sets it up for use. |
| 383 | * |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 384 | * These functions create file structures and maps them to fd space |
| 385 | * of the current process. On success it returns file descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | * and file struct implicitly stored in sock->file. |
| 387 | * Note that another thread may close file descriptor before we return |
| 388 | * from this function. We use the fact that now we do not refer |
| 389 | * to socket after mapping. If one day we will need it, this |
| 390 | * function will increment ref. count on file by 1. |
| 391 | * |
| 392 | * In any case returned fd MAY BE not valid! |
| 393 | * This race condition is unavoidable |
| 394 | * with shared fd spaces, we cannot solve it inside kernel, |
| 395 | * but we take care of internal coherence yet. |
| 396 | */ |
| 397 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 398 | 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] | 399 | { |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 400 | struct qstr name = { .name = "" }; |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 401 | struct path path; |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 402 | struct file *file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 403 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 404 | if (dname) { |
| 405 | name.name = dname; |
| 406 | name.len = strlen(name.name); |
| 407 | } else if (sock->sk) { |
| 408 | name.name = sock->sk->sk_prot_creator->name; |
| 409 | name.len = strlen(name.name); |
| 410 | } |
Nick Piggin | 4b93688 | 2011-01-07 17:50:07 +1100 | [diff] [blame] | 411 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 412 | if (unlikely(!path.dentry)) |
| 413 | return ERR_PTR(-ENOMEM); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 414 | path.mnt = mntget(sock_mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 416 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 417 | |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 418 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 419 | &socket_file_ops); |
Viresh Kumar | b5ffe63 | 2015-08-12 15:59:47 +0530 | [diff] [blame] | 420 | if (IS_ERR(file)) { |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 421 | /* drop dentry, keep inode */ |
David Howells | c5ef603 | 2015-03-17 22:26:16 +0000 | [diff] [blame] | 422 | ihold(d_inode(path.dentry)); |
Al Viro | 2c48b9c | 2009-08-09 00:52:35 +0400 | [diff] [blame] | 423 | path_put(&path); |
Anatol Pomozov | 39b6525 | 2012-09-12 20:11:55 -0700 | [diff] [blame] | 424 | return file; |
Al Viro | cc3808f | 2009-08-06 09:43:59 +0400 | [diff] [blame] | 425 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 426 | |
| 427 | sock->file = file; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 428 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 429 | file->private_data = sock; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 430 | return file; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 431 | } |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 432 | EXPORT_SYMBOL(sock_alloc_file); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 433 | |
Al Viro | 56b31d1 | 2012-08-18 00:25:51 -0400 | [diff] [blame] | 434 | static int sock_map_fd(struct socket *sock, int flags) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 435 | { |
| 436 | struct file *newfile; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 437 | int fd = get_unused_fd_flags(flags); |
| 438 | if (unlikely(fd < 0)) |
| 439 | return fd; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 440 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 441 | newfile = sock_alloc_file(sock, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 442 | if (likely(!IS_ERR(newfile))) { |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 443 | fd_install(fd, newfile); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 444 | return fd; |
| 445 | } |
Al Viro | 7cbe66b | 2009-08-05 19:59:08 +0400 | [diff] [blame] | 446 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 447 | put_unused_fd(fd); |
| 448 | return PTR_ERR(newfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | } |
| 450 | |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 451 | struct socket *sock_from_file(struct file *file, int *err) |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 452 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 453 | if (file->f_op == &socket_file_ops) |
| 454 | return file->private_data; /* set in sock_map_fd */ |
| 455 | |
Eric Dumazet | 23bb80d | 2007-02-08 14:59:57 -0800 | [diff] [blame] | 456 | *err = -ENOTSOCK; |
| 457 | return NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 458 | } |
John Fastabend | 406a3c6 | 2012-07-20 10:39:25 +0000 | [diff] [blame] | 459 | EXPORT_SYMBOL(sock_from_file); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 460 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | /** |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 462 | * sockfd_lookup - Go from a file number to its socket slot |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | * @fd: file handle |
| 464 | * @err: pointer to an error code return |
| 465 | * |
| 466 | * The file handle passed in is locked and the socket it is bound |
| 467 | * too is returned. If an error occurs the err pointer is overwritten |
| 468 | * with a negative errno code and NULL is returned. The function checks |
| 469 | * for both invalid handles and passing a handle which is not a socket. |
| 470 | * |
| 471 | * On a success the socket object pointer is returned. |
| 472 | */ |
| 473 | |
| 474 | struct socket *sockfd_lookup(int fd, int *err) |
| 475 | { |
| 476 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | struct socket *sock; |
| 478 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 479 | file = fget(fd); |
| 480 | if (!file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | *err = -EBADF; |
| 482 | return NULL; |
| 483 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 484 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 485 | sock = sock_from_file(file, err); |
| 486 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | fput(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | return sock; |
| 489 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 490 | EXPORT_SYMBOL(sockfd_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 492 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
| 493 | { |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 494 | struct fd f = fdget(fd); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 495 | struct socket *sock; |
| 496 | |
Hua Zhong | 3672558 | 2006-04-19 15:25:02 -0700 | [diff] [blame] | 497 | *err = -EBADF; |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 498 | if (f.file) { |
| 499 | sock = sock_from_file(f.file, err); |
| 500 | if (likely(sock)) { |
| 501 | *fput_needed = f.flags; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 502 | return sock; |
Al Viro | 00e188e | 2014-03-03 23:48:18 -0500 | [diff] [blame] | 503 | } |
| 504 | fdput(f); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 505 | } |
| 506 | return NULL; |
| 507 | } |
| 508 | |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 509 | static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, |
| 510 | size_t size) |
| 511 | { |
| 512 | ssize_t len; |
| 513 | ssize_t used = 0; |
| 514 | |
David Howells | c5ef603 | 2015-03-17 22:26:16 +0000 | [diff] [blame] | 515 | len = security_inode_listsecurity(d_inode(dentry), buffer, size); |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 516 | if (len < 0) |
| 517 | return len; |
| 518 | used += len; |
| 519 | if (buffer) { |
| 520 | if (size < used) |
| 521 | return -ERANGE; |
| 522 | buffer += len; |
| 523 | } |
| 524 | |
| 525 | len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); |
| 526 | used += len; |
| 527 | if (buffer) { |
| 528 | if (size < used) |
| 529 | return -ERANGE; |
| 530 | memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); |
| 531 | buffer += len; |
| 532 | } |
| 533 | |
| 534 | return used; |
| 535 | } |
| 536 | |
| 537 | static const struct inode_operations sockfs_inode_ops = { |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 538 | .listxattr = sockfs_listxattr, |
| 539 | }; |
| 540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | /** |
| 542 | * sock_alloc - allocate a socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 543 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | * Allocate a new inode and socket object. The two are bound together |
| 545 | * and initialised. The socket is then returned. If we are out of inodes |
| 546 | * NULL is returned. |
| 547 | */ |
| 548 | |
Tom Herbert | f4a00aa | 2016-03-07 14:11:01 -0800 | [diff] [blame] | 549 | struct socket *sock_alloc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 551 | struct inode *inode; |
| 552 | struct socket *sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
Eric Dumazet | a209dfc | 2011-07-26 11:36:34 +0200 | [diff] [blame] | 554 | inode = new_inode_pseudo(sock_mnt->mnt_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | if (!inode) |
| 556 | return NULL; |
| 557 | |
| 558 | sock = SOCKET_I(inode); |
| 559 | |
Eric Dumazet | 29a020d | 2009-09-15 02:39:20 -0700 | [diff] [blame] | 560 | kmemcheck_annotate_bitfield(sock, type); |
Christoph Hellwig | 85fe402 | 2010-10-23 11:19:54 -0400 | [diff] [blame] | 561 | inode->i_ino = get_next_ino(); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 562 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
David Howells | 8192b0c | 2008-11-14 10:39:10 +1100 | [diff] [blame] | 563 | inode->i_uid = current_fsuid(); |
| 564 | inode->i_gid = current_fsgid(); |
Masatake YAMATO | 600e177 | 2012-08-29 10:44:29 +0000 | [diff] [blame] | 565 | inode->i_op = &sockfs_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Alex Shi | 19e8d69 | 2012-05-14 14:15:31 -0700 | [diff] [blame] | 567 | this_cpu_add(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | return sock; |
| 569 | } |
Tom Herbert | f4a00aa | 2016-03-07 14:11:01 -0800 | [diff] [blame] | 570 | EXPORT_SYMBOL(sock_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | /** |
| 573 | * sock_release - close a socket |
| 574 | * @sock: socket to close |
| 575 | * |
| 576 | * The socket is released from the protocol stack if it has a release |
| 577 | * 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] | 578 | * an inode not a file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | void sock_release(struct socket *sock) |
| 582 | { |
| 583 | if (sock->ops) { |
| 584 | struct module *owner = sock->ops->owner; |
| 585 | |
| 586 | sock->ops->release(sock); |
| 587 | sock->ops = NULL; |
| 588 | module_put(owner); |
| 589 | } |
| 590 | |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 591 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 592 | pr_err("%s: fasync list not empty!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
Alex Shi | 19e8d69 | 2012-05-14 14:15:31 -0700 | [diff] [blame] | 594 | this_cpu_sub(sockets_in_use, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | if (!sock->file) { |
| 596 | iput(SOCK_INODE(sock)); |
| 597 | return; |
| 598 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 599 | sock->file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 601 | EXPORT_SYMBOL(sock_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | |
Soheil Hassas Yeganeh | c14ac94 | 2016-04-02 23:08:12 -0400 | [diff] [blame] | 603 | void __sock_tx_timestamp(__u16 tsflags, __u8 *tx_flags) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 604 | { |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 605 | u8 flags = *tx_flags; |
| 606 | |
Soheil Hassas Yeganeh | c14ac94 | 2016-04-02 23:08:12 -0400 | [diff] [blame] | 607 | if (tsflags & SOF_TIMESTAMPING_TX_HARDWARE) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 608 | flags |= SKBTX_HW_TSTAMP; |
| 609 | |
Soheil Hassas Yeganeh | c14ac94 | 2016-04-02 23:08:12 -0400 | [diff] [blame] | 610 | if (tsflags & SOF_TIMESTAMPING_TX_SOFTWARE) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 611 | flags |= SKBTX_SW_TSTAMP; |
| 612 | |
Soheil Hassas Yeganeh | c14ac94 | 2016-04-02 23:08:12 -0400 | [diff] [blame] | 613 | if (tsflags & SOF_TIMESTAMPING_TX_SCHED) |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 614 | flags |= SKBTX_SCHED_TSTAMP; |
| 615 | |
Eric Dumazet | 140c55d | 2014-08-06 11:49:29 +0200 | [diff] [blame] | 616 | *tx_flags = flags; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 617 | } |
Willem de Bruijn | 67cc0d4 | 2014-09-08 19:58:58 -0400 | [diff] [blame] | 618 | EXPORT_SYMBOL(__sock_tx_timestamp); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 619 | |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 620 | static inline int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | { |
Al Viro | 01e97e6 | 2014-12-15 21:39:31 -0500 | [diff] [blame] | 622 | int ret = sock->ops->sendmsg(sock, msg, msg_data_left(msg)); |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 623 | BUG_ON(ret == -EIOCBQUEUED); |
| 624 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | } |
Gu Zheng | 0cf00c6 | 2014-12-05 15:14:23 +0800 | [diff] [blame] | 626 | |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 627 | int sock_sendmsg(struct socket *sock, struct msghdr *msg) |
Gu Zheng | 0cf00c6 | 2014-12-05 15:14:23 +0800 | [diff] [blame] | 628 | { |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 629 | int err = security_socket_sendmsg(sock, msg, |
Al Viro | 01e97e6 | 2014-12-15 21:39:31 -0500 | [diff] [blame] | 630 | msg_data_left(msg)); |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 631 | |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 632 | return err ?: sock_sendmsg_nosec(sock, msg); |
Gu Zheng | 0cf00c6 | 2014-12-05 15:14:23 +0800 | [diff] [blame] | 633 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 634 | EXPORT_SYMBOL(sock_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
| 636 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 637 | struct kvec *vec, size_t num, size_t size) |
| 638 | { |
Al Viro | 6aa2481 | 2015-03-21 19:56:16 -0400 | [diff] [blame] | 639 | iov_iter_kvec(&msg->msg_iter, WRITE | ITER_KVEC, vec, num, size); |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 640 | return sock_sendmsg(sock, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 642 | EXPORT_SYMBOL(kernel_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 644 | /* |
| 645 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 646 | */ |
| 647 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 648 | struct sk_buff *skb) |
| 649 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 650 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 651 | struct scm_timestamping tss; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 652 | int empty = 1; |
| 653 | struct skb_shared_hwtstamps *shhwtstamps = |
| 654 | skb_hwtstamps(skb); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 655 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 656 | /* Race occurred between timestamp enabling and packet |
| 657 | receiving. Fill in the current time for now. */ |
| 658 | if (need_software_tstamp && skb->tstamp.tv64 == 0) |
| 659 | __net_timestamp(skb); |
| 660 | |
| 661 | if (need_software_tstamp) { |
| 662 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
| 663 | struct timeval tv; |
| 664 | skb_get_timestamp(skb, &tv); |
| 665 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, |
| 666 | sizeof(tv), &tv); |
| 667 | } else { |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 668 | struct timespec ts; |
| 669 | skb_get_timestampns(skb, &ts); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 670 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 671 | sizeof(ts), &ts); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 672 | } |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 673 | } |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 674 | |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 675 | memset(&tss, 0, sizeof(tss)); |
Willem de Bruijn | c199105 | 2014-09-03 12:01:18 -0400 | [diff] [blame] | 676 | if ((sk->sk_tsflags & SOF_TIMESTAMPING_SOFTWARE) && |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 677 | ktime_to_timespec_cond(skb->tstamp, tss.ts + 0)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 678 | empty = 0; |
Willem de Bruijn | 4d276eb | 2014-07-25 18:01:32 -0400 | [diff] [blame] | 679 | if (shhwtstamps && |
Willem de Bruijn | b9f40e2 | 2014-08-04 22:11:46 -0400 | [diff] [blame] | 680 | (sk->sk_tsflags & SOF_TIMESTAMPING_RAW_HARDWARE) && |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 681 | ktime_to_timespec_cond(shhwtstamps->hwtstamp, tss.ts + 2)) |
Willem de Bruijn | 4d276eb | 2014-07-25 18:01:32 -0400 | [diff] [blame] | 682 | empty = 0; |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 683 | if (!empty) |
| 684 | put_cmsg(msg, SOL_SOCKET, |
Willem de Bruijn | f24b9be | 2014-08-04 22:11:45 -0400 | [diff] [blame] | 685 | SCM_TIMESTAMPING, sizeof(tss), &tss); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 686 | } |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 687 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 688 | |
Johannes Berg | 6e3e939 | 2011-11-09 10:15:42 +0100 | [diff] [blame] | 689 | void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, |
| 690 | struct sk_buff *skb) |
| 691 | { |
| 692 | int ack; |
| 693 | |
| 694 | if (!sock_flag(sk, SOCK_WIFI_STATUS)) |
| 695 | return; |
| 696 | if (!skb->wifi_acked_valid) |
| 697 | return; |
| 698 | |
| 699 | ack = skb->wifi_acked; |
| 700 | |
| 701 | put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); |
| 702 | } |
| 703 | EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); |
| 704 | |
stephen hemminger | 11165f1 | 2010-10-18 14:27:29 +0000 | [diff] [blame] | 705 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
| 706 | struct sk_buff *skb) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 707 | { |
Eyal Birger | 744d5a3 | 2015-03-01 14:58:31 +0200 | [diff] [blame] | 708 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && SOCK_SKB_CB(skb)->dropcount) |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 709 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, |
Eyal Birger | 744d5a3 | 2015-03-01 14:58:31 +0200 | [diff] [blame] | 710 | sizeof(__u32), &SOCK_SKB_CB(skb)->dropcount); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 711 | } |
| 712 | |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 713 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 714 | struct sk_buff *skb) |
| 715 | { |
| 716 | sock_recv_timestamp(msg, sk, skb); |
| 717 | sock_recv_drops(msg, sk, skb); |
| 718 | } |
Eric Dumazet | 767dd03 | 2010-04-28 19:14:43 +0000 | [diff] [blame] | 719 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 720 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 721 | static inline int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 722 | int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | { |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 724 | return sock->ops->recvmsg(sock, msg, msg_data_left(msg), flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | } |
| 726 | |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 727 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, int flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 728 | { |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 729 | int err = security_socket_recvmsg(sock, msg, msg_data_left(msg), flags); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 730 | |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 731 | return err ?: sock_recvmsg_nosec(sock, msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 733 | EXPORT_SYMBOL(sock_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
Martin Lucina | c1249c0 | 2010-12-10 00:04:05 +0000 | [diff] [blame] | 735 | /** |
| 736 | * kernel_recvmsg - Receive a message from a socket (kernel space) |
| 737 | * @sock: The socket to receive the message from |
| 738 | * @msg: Received message |
| 739 | * @vec: Input s/g array for message data |
| 740 | * @num: Size of input s/g array |
| 741 | * @size: Number of bytes to read |
| 742 | * @flags: Message flags (MSG_DONTWAIT, etc...) |
| 743 | * |
| 744 | * On return the msg structure contains the scatter/gather array passed in the |
| 745 | * vec argument. The array is modified so that it consists of the unfilled |
| 746 | * portion of the original array. |
| 747 | * |
| 748 | * The returned value is the total number of bytes received, or an error. |
| 749 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 750 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 751 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | { |
| 753 | mm_segment_t oldfs = get_fs(); |
| 754 | int result; |
| 755 | |
Al Viro | 6aa2481 | 2015-03-21 19:56:16 -0400 | [diff] [blame] | 756 | iov_iter_kvec(&msg->msg_iter, READ | ITER_KVEC, vec, num, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | set_fs(KERNEL_DS); |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 758 | result = sock_recvmsg(sock, msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | set_fs(oldfs); |
| 760 | return result; |
| 761 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 762 | EXPORT_SYMBOL(kernel_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 764 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 765 | int offset, size_t size, loff_t *ppos, int more) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | { |
| 767 | struct socket *sock; |
| 768 | int flags; |
| 769 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 770 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | |
Eric Dumazet | 35f9c09 | 2012-04-05 03:05:35 +0000 | [diff] [blame] | 772 | flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 773 | /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ |
| 774 | flags |= more; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | |
Linus Torvalds | e694958 | 2009-08-13 08:28:36 -0700 | [diff] [blame] | 776 | return kernel_sendpage(sock, page, offset, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | } |
| 778 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 779 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 780 | struct pipe_inode_info *pipe, size_t len, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 781 | unsigned int flags) |
| 782 | { |
| 783 | struct socket *sock = file->private_data; |
| 784 | |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 785 | if (unlikely(!sock->ops->splice_read)) |
| 786 | return -EINVAL; |
| 787 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 788 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
| 789 | } |
| 790 | |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 791 | static ssize_t sock_read_iter(struct kiocb *iocb, struct iov_iter *to) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 792 | { |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 793 | struct file *file = iocb->ki_filp; |
| 794 | struct socket *sock = file->private_data; |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 795 | struct msghdr msg = {.msg_iter = *to, |
| 796 | .msg_iocb = iocb}; |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 797 | ssize_t res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 798 | |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 799 | if (file->f_flags & O_NONBLOCK) |
| 800 | msg.msg_flags = MSG_DONTWAIT; |
| 801 | |
| 802 | if (iocb->ki_pos != 0) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 803 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 804 | |
Christoph Hellwig | 66ee59a | 2015-02-11 19:56:46 +0100 | [diff] [blame] | 805 | if (!iov_iter_count(to)) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 806 | return 0; |
| 807 | |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 808 | res = sock_recvmsg(sock, &msg, msg.msg_flags); |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 809 | *to = msg.msg_iter; |
| 810 | return res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 811 | } |
| 812 | |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 813 | static ssize_t sock_write_iter(struct kiocb *iocb, struct iov_iter *from) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | { |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 815 | struct file *file = iocb->ki_filp; |
| 816 | struct socket *sock = file->private_data; |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 817 | struct msghdr msg = {.msg_iter = *from, |
| 818 | .msg_iocb = iocb}; |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 819 | ssize_t res; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 820 | |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 821 | if (iocb->ki_pos != 0) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 822 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 823 | |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 824 | if (file->f_flags & O_NONBLOCK) |
| 825 | msg.msg_flags = MSG_DONTWAIT; |
| 826 | |
Al Viro | 6d65233 | 2015-01-30 16:12:56 -0500 | [diff] [blame] | 827 | if (sock->type == SOCK_SEQPACKET) |
| 828 | msg.msg_flags |= MSG_EOR; |
| 829 | |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 830 | res = sock_sendmsg(sock, &msg); |
Al Viro | 8ae5e03 | 2014-11-28 19:40:50 -0500 | [diff] [blame] | 831 | *from = msg.msg_iter; |
| 832 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | } |
| 834 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | /* |
| 836 | * Atomic setting of ioctl hooks to avoid race |
| 837 | * with module unload. |
| 838 | */ |
| 839 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 840 | static DEFINE_MUTEX(br_ioctl_mutex); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 841 | 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] | 842 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 843 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 844 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 845 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 847 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | } |
| 849 | EXPORT_SYMBOL(brioctl_set); |
| 850 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 851 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 852 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 854 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 855 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 856 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 857 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 858 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | } |
| 860 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 861 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 862 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 863 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 865 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 867 | mutex_lock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 868 | dlci_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 869 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | } |
| 871 | EXPORT_SYMBOL(dlci_ioctl_set); |
| 872 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 873 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
| 874 | unsigned int cmd, unsigned long arg) |
| 875 | { |
| 876 | int err; |
| 877 | void __user *argp = (void __user *)arg; |
| 878 | |
| 879 | err = sock->ops->ioctl(sock, cmd, arg); |
| 880 | |
| 881 | /* |
| 882 | * If this ioctl is unknown try to hand it down |
| 883 | * to the NIC driver. |
| 884 | */ |
| 885 | if (err == -ENOIOCTLCMD) |
| 886 | err = dev_ioctl(net, cmd, argp); |
| 887 | |
| 888 | return err; |
| 889 | } |
| 890 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | /* |
| 892 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 893 | * what to do with it - that's up to the protocol still. |
| 894 | */ |
| 895 | |
| 896 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 897 | { |
| 898 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 899 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | void __user *argp = (void __user *)arg; |
| 901 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 902 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 904 | sock = file->private_data; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 905 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 906 | net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 908 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 910 | #ifdef CONFIG_WEXT_CORE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 912 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | } else |
Johannes Berg | 3d23e34 | 2009-09-29 23:27:28 +0200 | [diff] [blame] | 914 | #endif |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 915 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | case FIOSETOWN: |
| 917 | case SIOCSPGRP: |
| 918 | err = -EFAULT; |
| 919 | if (get_user(pid, (int __user *)argp)) |
| 920 | break; |
Jeff Layton | e0b93ed | 2014-08-22 11:27:32 -0400 | [diff] [blame] | 921 | f_setown(sock->file, pid, 1); |
| 922 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | break; |
| 924 | case FIOGETOWN: |
| 925 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 926 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 927 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | break; |
| 929 | case SIOCGIFBR: |
| 930 | case SIOCSIFBR: |
| 931 | case SIOCBRADDBR: |
| 932 | case SIOCBRDELBR: |
| 933 | err = -ENOPKG; |
| 934 | if (!br_ioctl_hook) |
| 935 | request_module("bridge"); |
| 936 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 937 | mutex_lock(&br_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 938 | if (br_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 939 | err = br_ioctl_hook(net, cmd, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 940 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | break; |
| 942 | case SIOCGIFVLAN: |
| 943 | case SIOCSIFVLAN: |
| 944 | err = -ENOPKG; |
| 945 | if (!vlan_ioctl_hook) |
| 946 | request_module("8021q"); |
| 947 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 948 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 950 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 951 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | case SIOCADDDLCI: |
| 954 | case SIOCDELDLCI: |
| 955 | err = -ENOPKG; |
| 956 | if (!dlci_ioctl_hook) |
| 957 | request_module("dlci"); |
| 958 | |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 959 | mutex_lock(&dlci_ioctl_mutex); |
| 960 | if (dlci_ioctl_hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | err = dlci_ioctl_hook(cmd, argp); |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 962 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | break; |
| 964 | default: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 965 | err = sock_do_ioctl(net, sock, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 967 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | return err; |
| 969 | } |
| 970 | |
| 971 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 972 | { |
| 973 | int err; |
| 974 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 975 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 976 | err = security_socket_create(family, type, protocol, 1); |
| 977 | if (err) |
| 978 | goto out; |
| 979 | |
| 980 | sock = sock_alloc(); |
| 981 | if (!sock) { |
| 982 | err = -ENOMEM; |
| 983 | goto out; |
| 984 | } |
| 985 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 987 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 988 | if (err) |
| 989 | goto out_release; |
| 990 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 991 | out: |
| 992 | *res = sock; |
| 993 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 994 | out_release: |
| 995 | sock_release(sock); |
| 996 | sock = NULL; |
| 997 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 999 | EXPORT_SYMBOL(sock_create_lite); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | |
| 1001 | /* No kernel lock held - perfect */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1002 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | { |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1004 | unsigned int busy_flag = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | struct socket *sock; |
| 1006 | |
| 1007 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1008 | * 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] | 1009 | */ |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1010 | sock = file->private_data; |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1011 | |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1012 | if (sk_can_busy_loop(sock->sk)) { |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1013 | /* this socket can poll_ll so tell the system call */ |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1014 | busy_flag = POLL_BUSY_LOOP; |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1015 | |
| 1016 | /* once, only if requested by syscall */ |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1017 | if (wait && (wait->_key & POLL_BUSY_LOOP)) |
| 1018 | sk_busy_loop(sock->sk, 1); |
Eliezer Tamir | 2d48d67 | 2013-06-24 10:28:03 +0300 | [diff] [blame] | 1019 | } |
| 1020 | |
Eliezer Tamir | cbf5500 | 2013-07-08 16:20:34 +0300 | [diff] [blame] | 1021 | return busy_flag | sock->ops->poll(file, sock, wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | } |
| 1023 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1024 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1026 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | |
| 1028 | return sock->ops->mmap(file, sock, vma); |
| 1029 | } |
| 1030 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 1031 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1033 | sock_release(SOCKET_I(inode)); |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
| 1037 | /* |
| 1038 | * Update the socket async list |
| 1039 | * |
| 1040 | * Fasync_list locking strategy. |
| 1041 | * |
| 1042 | * 1. fasync_list is modified only under process context socket lock |
| 1043 | * i.e. under semaphore. |
| 1044 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1045 | * or under socket lock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1046 | */ |
| 1047 | |
| 1048 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1049 | { |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1050 | struct socket *sock = filp->private_data; |
| 1051 | struct sock *sk = sock->sk; |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1052 | struct socket_wq *wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1054 | if (sk == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | |
| 1057 | lock_sock(sk); |
Hannes Frederic Sowa | 1e1d04e | 2016-04-05 17:10:15 +0200 | [diff] [blame] | 1058 | wq = rcu_dereference_protected(sock->wq, lockdep_sock_is_held(sk)); |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1059 | fasync_helper(fd, filp, on, &wq->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1060 | |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 1061 | if (!wq->fasync_list) |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1062 | sock_reset_flag(sk, SOCK_FASYNC); |
Jonathan Corbet | 7639842 | 2009-02-01 14:26:59 -0700 | [diff] [blame] | 1063 | else |
Eric Dumazet | bcdce71 | 2009-10-06 17:28:29 -0700 | [diff] [blame] | 1064 | sock_set_flag(sk, SOCK_FASYNC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | |
Eric Dumazet | 989a297 | 2010-04-14 09:55:35 +0000 | [diff] [blame] | 1066 | release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | return 0; |
| 1068 | } |
| 1069 | |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1070 | /* This function may be called only under rcu_lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1072 | int sock_wake_async(struct socket_wq *wq, int how, int band) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | { |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1074 | if (!wq || !wq->fasync_list) |
| 1075 | return -1; |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1076 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1077 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1078 | case SOCK_WAKE_WAITD: |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1079 | if (test_bit(SOCKWQ_ASYNC_WAITDATA, &wq->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1080 | break; |
| 1081 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1082 | case SOCK_WAKE_SPACE: |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1083 | if (!test_and_clear_bit(SOCKWQ_ASYNC_NOSPACE, &wq->flags)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | break; |
| 1085 | /* fall through */ |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1086 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1087 | call_kill: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1088 | kill_fasync(&wq->fasync_list, SIGIO, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1090 | case SOCK_WAKE_URG: |
Eric Dumazet | 4381548 | 2010-04-29 11:01:49 +0000 | [diff] [blame] | 1091 | kill_fasync(&wq->fasync_list, SIGURG, band); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | } |
Eric Dumazet | ceb5d58 | 2015-11-29 20:03:11 -0800 | [diff] [blame] | 1093 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1094 | return 0; |
| 1095 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1096 | EXPORT_SYMBOL(sock_wake_async); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1098 | int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1099 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | { |
| 1101 | int err; |
| 1102 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1103 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
| 1105 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1106 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | */ |
| 1108 | if (family < 0 || family >= NPROTO) |
| 1109 | return -EAFNOSUPPORT; |
| 1110 | if (type < 0 || type >= SOCK_MAX) |
| 1111 | return -EINVAL; |
| 1112 | |
| 1113 | /* Compatibility. |
| 1114 | |
| 1115 | This uglymoron is moved from INET layer to here to avoid |
| 1116 | deadlock in module load. |
| 1117 | */ |
| 1118 | if (family == PF_INET && type == SOCK_PACKET) { |
liping.zhang | f3c9869 | 2016-03-11 23:08:36 +0800 | [diff] [blame] | 1119 | pr_info_once("%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1120 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | family = PF_PACKET; |
| 1122 | } |
| 1123 | |
| 1124 | err = security_socket_create(family, type, protocol, kern); |
| 1125 | if (err) |
| 1126 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1127 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1128 | /* |
| 1129 | * Allocate the socket and allow the family to set things up. if |
| 1130 | * the protocol is 0, the family is instructed to select an appropriate |
| 1131 | * default. |
| 1132 | */ |
| 1133 | sock = sock_alloc(); |
| 1134 | if (!sock) { |
Joe Perches | e87cc47 | 2012-05-13 21:56:26 +0000 | [diff] [blame] | 1135 | net_warn_ratelimited("socket: no more sockets\n"); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1136 | return -ENFILE; /* Not exactly a match, but its the |
| 1137 | closest posix thing */ |
| 1138 | } |
| 1139 | |
| 1140 | sock->type = type; |
| 1141 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1142 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1143 | /* Attempt to load a protocol module if the find failed. |
| 1144 | * |
| 1145 | * 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] | 1146 | * requested real, full-featured networking support upon configuration. |
| 1147 | * Otherwise module support will break! |
| 1148 | */ |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 1149 | if (rcu_access_pointer(net_families[family]) == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1150 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | #endif |
| 1152 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1153 | rcu_read_lock(); |
| 1154 | pf = rcu_dereference(net_families[family]); |
| 1155 | err = -EAFNOSUPPORT; |
| 1156 | if (!pf) |
| 1157 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1158 | |
| 1159 | /* |
| 1160 | * We will call the ->create function, that possibly is in a loadable |
| 1161 | * module, so we have to bump that loadable module refcnt first. |
| 1162 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1163 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | goto out_release; |
| 1165 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1166 | /* Now protected by module ref count */ |
| 1167 | rcu_read_unlock(); |
| 1168 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 1169 | err = pf->create(net, sock, protocol, kern); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1170 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | /* |
| 1174 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1175 | * socket at sock_release time we decrement its refcnt. |
| 1176 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1177 | if (!try_module_get(sock->ops->owner)) |
| 1178 | goto out_module_busy; |
| 1179 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | /* |
| 1181 | * Now that we're done with the ->create function, the [loadable] |
| 1182 | * module can have its refcnt decremented |
| 1183 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1184 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1185 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1186 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1187 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1188 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1190 | return 0; |
| 1191 | |
| 1192 | out_module_busy: |
| 1193 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1195 | sock->ops = NULL; |
| 1196 | module_put(pf->owner); |
| 1197 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1199 | return err; |
| 1200 | |
| 1201 | out_release: |
| 1202 | rcu_read_unlock(); |
| 1203 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | } |
Pavel Emelyanov | 721db93 | 2010-09-29 16:06:32 +0400 | [diff] [blame] | 1205 | EXPORT_SYMBOL(__sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | |
| 1207 | int sock_create(int family, int type, int protocol, struct socket **res) |
| 1208 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1209 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1211 | EXPORT_SYMBOL(sock_create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | |
Eric W. Biederman | eeb1bd5 | 2015-05-08 21:08:05 -0500 | [diff] [blame] | 1213 | int sock_create_kern(struct net *net, int family, int type, int protocol, struct socket **res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | { |
Eric W. Biederman | eeb1bd5 | 2015-05-08 21:08:05 -0500 | [diff] [blame] | 1215 | return __sock_create(net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1216 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1217 | EXPORT_SYMBOL(sock_create_kern); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1219 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | { |
| 1221 | int retval; |
| 1222 | struct socket *sock; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1223 | int flags; |
| 1224 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1225 | /* Check the SOCK_* constants for consistency. */ |
| 1226 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1227 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1228 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1229 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1230 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1231 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1232 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1233 | return -EINVAL; |
| 1234 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1236 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1237 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | retval = sock_create(family, type, protocol, &sock); |
| 1240 | if (retval < 0) |
| 1241 | goto out; |
| 1242 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1243 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | if (retval < 0) |
| 1245 | goto out_release; |
| 1246 | |
| 1247 | out: |
| 1248 | /* It may be already another descriptor 8) Not kernel problem. */ |
| 1249 | return retval; |
| 1250 | |
| 1251 | out_release: |
| 1252 | sock_release(sock); |
| 1253 | return retval; |
| 1254 | } |
| 1255 | |
| 1256 | /* |
| 1257 | * Create a pair of connected sockets. |
| 1258 | */ |
| 1259 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1260 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
| 1261 | int __user *, usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | { |
| 1263 | struct socket *sock1, *sock2; |
| 1264 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1265 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1266 | int flags; |
| 1267 | |
| 1268 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1269 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1270 | return -EINVAL; |
| 1271 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1272 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1273 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1274 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | /* |
| 1277 | * Obtain the first socket and check if the underlying protocol |
| 1278 | * supports the socketpair call. |
| 1279 | */ |
| 1280 | |
| 1281 | err = sock_create(family, type, protocol, &sock1); |
| 1282 | if (err < 0) |
| 1283 | goto out; |
| 1284 | |
| 1285 | err = sock_create(family, type, protocol, &sock2); |
| 1286 | if (err < 0) |
| 1287 | goto out_release_1; |
| 1288 | |
| 1289 | err = sock1->ops->socketpair(sock1, sock2); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1290 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | goto out_release_both; |
| 1292 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1293 | fd1 = get_unused_fd_flags(flags); |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1294 | if (unlikely(fd1 < 0)) { |
| 1295 | err = fd1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | goto out_release_both; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1297 | } |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1298 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1299 | fd2 = get_unused_fd_flags(flags); |
Al Viro | 198de4d | 2009-08-05 19:29:23 +0400 | [diff] [blame] | 1300 | if (unlikely(fd2 < 0)) { |
| 1301 | err = fd2; |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1302 | goto out_put_unused_1; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1303 | } |
| 1304 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1305 | newfile1 = sock_alloc_file(sock1, flags, NULL); |
Viresh Kumar | b5ffe63 | 2015-08-12 15:59:47 +0530 | [diff] [blame] | 1306 | if (IS_ERR(newfile1)) { |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1307 | err = PTR_ERR(newfile1); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1308 | goto out_put_unused_both; |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1309 | } |
| 1310 | |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1311 | newfile2 = sock_alloc_file(sock2, flags, NULL); |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1312 | if (IS_ERR(newfile2)) { |
| 1313 | err = PTR_ERR(newfile2); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1314 | goto out_fput_1; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1315 | } |
| 1316 | |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1317 | err = put_user(fd1, &usockvec[0]); |
| 1318 | if (err) |
| 1319 | goto out_fput_both; |
| 1320 | |
| 1321 | err = put_user(fd2, &usockvec[1]); |
| 1322 | if (err) |
| 1323 | goto out_fput_both; |
| 1324 | |
Al Viro | 157cf64 | 2008-12-14 04:57:47 -0500 | [diff] [blame] | 1325 | audit_fd_pair(fd1, fd2); |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1326 | |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1327 | fd_install(fd1, newfile1); |
| 1328 | fd_install(fd2, newfile2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | /* fd1 and fd2 may be already another descriptors. |
| 1330 | * Not kernel problem. |
| 1331 | */ |
| 1332 | |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1333 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1335 | out_fput_both: |
| 1336 | fput(newfile2); |
| 1337 | fput(newfile1); |
| 1338 | put_unused_fd(fd2); |
| 1339 | put_unused_fd(fd1); |
| 1340 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | |
Yann Droneaud | d73aa28 | 2013-12-09 22:42:20 +0100 | [diff] [blame] | 1342 | out_fput_1: |
| 1343 | fput(newfile1); |
| 1344 | put_unused_fd(fd2); |
| 1345 | put_unused_fd(fd1); |
| 1346 | sock_release(sock2); |
| 1347 | goto out; |
| 1348 | |
| 1349 | out_put_unused_both: |
| 1350 | put_unused_fd(fd2); |
| 1351 | out_put_unused_1: |
| 1352 | put_unused_fd(fd1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | out_release_both: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1354 | sock_release(sock2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1355 | out_release_1: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1356 | sock_release(sock1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | out: |
| 1358 | return err; |
| 1359 | } |
| 1360 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1361 | /* |
| 1362 | * Bind a name to a socket. Nothing much to do here since it's |
| 1363 | * the protocol's responsibility to handle the local address. |
| 1364 | * |
| 1365 | * We move the socket address to kernel space before we call |
| 1366 | * the protocol layer (having also checked the address is ok). |
| 1367 | */ |
| 1368 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1369 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | { |
| 1371 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1372 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1373 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1374 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1375 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1376 | if (sock) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1377 | err = move_addr_to_kernel(umyaddr, addrlen, &address); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1378 | if (err >= 0) { |
| 1379 | err = security_socket_bind(sock, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1380 | (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1381 | addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1382 | if (!err) |
| 1383 | err = sock->ops->bind(sock, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1384 | (struct sockaddr *) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1385 | &address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | } |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1387 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1388 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | return err; |
| 1390 | } |
| 1391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1392 | /* |
| 1393 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1394 | * necessary for a listen, and if that works, we mark the socket as |
| 1395 | * ready for listening. |
| 1396 | */ |
| 1397 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1398 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | { |
| 1400 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1401 | int err, fput_needed; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1402 | int somaxconn; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1403 | |
| 1404 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1405 | if (sock) { |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 1406 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1407 | if ((unsigned int)backlog > somaxconn) |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1408 | backlog = somaxconn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | |
| 1410 | err = security_socket_listen(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1411 | if (!err) |
| 1412 | err = sock->ops->listen(sock, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1414 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | } |
| 1416 | return err; |
| 1417 | } |
| 1418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | /* |
| 1420 | * For accept, we attempt to create a new socket, set up the link |
| 1421 | * with the client, wake up the client, then return the new |
| 1422 | * connected fd. We collect the address of the connector in kernel |
| 1423 | * space and move it to user at the very end. This is unclean because |
| 1424 | * we open the socket then return an error. |
| 1425 | * |
| 1426 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 1427 | * status to recvmsg. We need to add that support in a way thats |
| 1428 | * clean when we restucture accept also. |
| 1429 | */ |
| 1430 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1431 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1432 | int __user *, upeer_addrlen, int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | { |
| 1434 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1435 | struct file *newfile; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1436 | int err, len, newfd, fput_needed; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1437 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1439 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1440 | return -EINVAL; |
| 1441 | |
| 1442 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1443 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1444 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1445 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1446 | if (!sock) |
| 1447 | goto out; |
| 1448 | |
| 1449 | err = -ENFILE; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 1450 | newsock = sock_alloc(); |
| 1451 | if (!newsock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | goto out_put; |
| 1453 | |
| 1454 | newsock->type = sock->type; |
| 1455 | newsock->ops = sock->ops; |
| 1456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | /* |
| 1458 | * We don't need try_module_get here, as the listening socket (sock) |
| 1459 | * has the protocol module (sock->ops->owner) held. |
| 1460 | */ |
| 1461 | __module_get(newsock->ops->owner); |
| 1462 | |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1463 | newfd = get_unused_fd_flags(flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1464 | if (unlikely(newfd < 0)) { |
| 1465 | err = newfd; |
David S. Miller | 9a1875e | 2006-04-01 12:48:36 -0800 | [diff] [blame] | 1466 | sock_release(newsock); |
| 1467 | goto out_put; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1468 | } |
Linus Torvalds | aab174f | 2012-10-02 20:25:04 -0700 | [diff] [blame] | 1469 | newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); |
Viresh Kumar | b5ffe63 | 2015-08-12 15:59:47 +0530 | [diff] [blame] | 1470 | if (IS_ERR(newfile)) { |
Al Viro | 2840763 | 2012-08-17 23:54:15 -0400 | [diff] [blame] | 1471 | err = PTR_ERR(newfile); |
| 1472 | put_unused_fd(newfd); |
| 1473 | sock_release(newsock); |
| 1474 | goto out_put; |
| 1475 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1476 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1477 | err = security_socket_accept(sock, newsock); |
| 1478 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1479 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1480 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
| 1482 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1483 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | |
| 1485 | if (upeer_sockaddr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1486 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1487 | &len, 2) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1489 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | } |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1491 | err = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1492 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1494 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | } |
| 1496 | |
| 1497 | /* File flags are not inherited via accept() unlike another OSes. */ |
| 1498 | |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1499 | fd_install(newfd, newfile); |
| 1500 | err = newfd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1503 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | out: |
| 1505 | return err; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1506 | out_fd: |
David S. Miller | 9606a21 | 2006-04-01 01:00:14 -0800 | [diff] [blame] | 1507 | fput(newfile); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1508 | put_unused_fd(newfd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | goto out_put; |
| 1510 | } |
| 1511 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1512 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
| 1513 | int __user *, upeer_addrlen) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1514 | { |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 1515 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1516 | } |
| 1517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | /* |
| 1519 | * Attempt to connect to a socket with the server address. The address |
| 1520 | * is in user space so we verify it is OK and move it to kernel space. |
| 1521 | * |
| 1522 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 1523 | * break bindings |
| 1524 | * |
| 1525 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 1526 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 1527 | * include the -EINPROGRESS status for such sockets. |
| 1528 | */ |
| 1529 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1530 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
| 1531 | int, addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | { |
| 1533 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1534 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1535 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1537 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | if (!sock) |
| 1539 | goto out; |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1540 | err = move_addr_to_kernel(uservaddr, addrlen, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | if (err < 0) |
| 1542 | goto out_put; |
| 1543 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1544 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1545 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | if (err) |
| 1547 | goto out_put; |
| 1548 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1549 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | sock->file->f_flags); |
| 1551 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1552 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | out: |
| 1554 | return err; |
| 1555 | } |
| 1556 | |
| 1557 | /* |
| 1558 | * Get the local address ('name') of a socket object. Move the obtained |
| 1559 | * name to user space. |
| 1560 | */ |
| 1561 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1562 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
| 1563 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | { |
| 1565 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1566 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1567 | int len, err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1568 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1569 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | if (!sock) |
| 1571 | goto out; |
| 1572 | |
| 1573 | err = security_socket_getsockname(sock); |
| 1574 | if (err) |
| 1575 | goto out_put; |
| 1576 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1577 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | if (err) |
| 1579 | goto out_put; |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1580 | err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | |
| 1582 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1583 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | out: |
| 1585 | return err; |
| 1586 | } |
| 1587 | |
| 1588 | /* |
| 1589 | * Get the remote address ('name') of a socket object. Move the obtained |
| 1590 | * name to user space. |
| 1591 | */ |
| 1592 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1593 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
| 1594 | int __user *, usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1595 | { |
| 1596 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1597 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1598 | int len, err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1600 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1601 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | err = security_socket_getpeername(sock); |
| 1603 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1604 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | return err; |
| 1606 | } |
| 1607 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1608 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1609 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1610 | 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | if (!err) |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1612 | err = move_addr_to_user(&address, len, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1613 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1614 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | } |
| 1616 | return err; |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * Send a datagram to a given address. We move the address into kernel |
| 1621 | * space and check the user space data area is readable before invoking |
| 1622 | * the protocol. |
| 1623 | */ |
| 1624 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1625 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1626 | unsigned int, flags, struct sockaddr __user *, addr, |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1627 | int, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | { |
| 1629 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1630 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | int err; |
| 1632 | struct msghdr msg; |
| 1633 | struct iovec iov; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1634 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1635 | |
Al Viro | 602bd0e | 2015-03-21 19:12:32 -0400 | [diff] [blame] | 1636 | err = import_single_range(WRITE, buff, len, &iov, &msg.msg_iter); |
| 1637 | if (unlikely(err)) |
| 1638 | return err; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1639 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1640 | if (!sock) |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1641 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1642 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1643 | msg.msg_name = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1644 | msg.msg_control = NULL; |
| 1645 | msg.msg_controllen = 0; |
| 1646 | msg.msg_namelen = 0; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1647 | if (addr) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1648 | err = move_addr_to_kernel(addr, addr_len, &address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | if (err < 0) |
| 1650 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1651 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1652 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | } |
| 1654 | if (sock->file->f_flags & O_NONBLOCK) |
| 1655 | flags |= MSG_DONTWAIT; |
| 1656 | msg.msg_flags = flags; |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 1657 | err = sock_sendmsg(sock, &msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1659 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1660 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1661 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | return err; |
| 1663 | } |
| 1664 | |
| 1665 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1666 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | */ |
| 1668 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1669 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1670 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | { |
| 1672 | return sys_sendto(fd, buff, len, flags, NULL, 0); |
| 1673 | } |
| 1674 | |
| 1675 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1676 | * 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] | 1677 | * sender. We verify the buffers are writable and if needed move the |
| 1678 | * sender address from kernel to user space. |
| 1679 | */ |
| 1680 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1681 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1682 | unsigned int, flags, struct sockaddr __user *, addr, |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 1683 | int __user *, addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | { |
| 1685 | struct socket *sock; |
| 1686 | struct iovec iov; |
| 1687 | struct msghdr msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1688 | struct sockaddr_storage address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1689 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1690 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | |
Al Viro | 602bd0e | 2015-03-21 19:12:32 -0400 | [diff] [blame] | 1692 | err = import_single_range(READ, ubuf, size, &iov, &msg.msg_iter); |
| 1693 | if (unlikely(err)) |
| 1694 | return err; |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -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) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1697 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1699 | msg.msg_control = NULL; |
| 1700 | msg.msg_controllen = 0; |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 1701 | /* Save some cycles and don't copy the address if not needed */ |
| 1702 | msg.msg_name = addr ? (struct sockaddr *)&address : NULL; |
| 1703 | /* We assume all kernel code knows the size of sockaddr_storage */ |
| 1704 | msg.msg_namelen = 0; |
tadeusz.struk@intel.com | 130ed5d | 2015-12-15 10:46:17 -0800 | [diff] [blame] | 1705 | msg.msg_iocb = NULL; |
Alexander Potapenko | ae0ebdb | 2017-03-08 18:08:16 +0100 | [diff] [blame] | 1706 | msg.msg_flags = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | if (sock->file->f_flags & O_NONBLOCK) |
| 1708 | flags |= MSG_DONTWAIT; |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 1709 | err = sock_recvmsg(sock, &msg, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1711 | if (err >= 0 && addr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 1712 | err2 = move_addr_to_user(&address, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1713 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1714 | if (err2 < 0) |
| 1715 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1716 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1717 | |
| 1718 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1719 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | return err; |
| 1721 | } |
| 1722 | |
| 1723 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1724 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | */ |
| 1726 | |
Jan Glauber | b7c0ddf | 2014-04-16 09:32:48 +0200 | [diff] [blame] | 1727 | SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, |
| 1728 | unsigned int, flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | { |
| 1730 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
| 1731 | } |
| 1732 | |
| 1733 | /* |
| 1734 | * Set a socket option. Because we don't know the option lengths we have |
| 1735 | * to pass the user mode parameter for the protocols to sort out. |
| 1736 | */ |
| 1737 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1738 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
| 1739 | char __user *, optval, int, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1741 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | struct socket *sock; |
| 1743 | |
| 1744 | if (optlen < 0) |
| 1745 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1746 | |
| 1747 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1748 | if (sock != NULL) { |
| 1749 | err = security_socket_setsockopt(sock, level, optname); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1750 | if (err) |
| 1751 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | |
| 1753 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1754 | err = |
| 1755 | sock_setsockopt(sock, level, optname, optval, |
| 1756 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1758 | err = |
| 1759 | sock->ops->setsockopt(sock, level, optname, optval, |
| 1760 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1761 | out_put: |
| 1762 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | } |
| 1764 | return err; |
| 1765 | } |
| 1766 | |
| 1767 | /* |
| 1768 | * Get a socket option. Because we don't know the option lengths we have |
| 1769 | * to pass a user mode parameter for the protocols to sort out. |
| 1770 | */ |
| 1771 | |
Heiko Carstens | 20f3703 | 2009-01-14 14:14:23 +0100 | [diff] [blame] | 1772 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
| 1773 | char __user *, optval, int __user *, optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1775 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1776 | struct socket *sock; |
| 1777 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1778 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1779 | if (sock != NULL) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1780 | err = security_socket_getsockopt(sock, level, optname); |
| 1781 | if (err) |
| 1782 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | |
| 1784 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1785 | err = |
| 1786 | sock_getsockopt(sock, level, optname, optval, |
| 1787 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1788 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1789 | err = |
| 1790 | sock->ops->getsockopt(sock, level, optname, optval, |
| 1791 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1792 | out_put: |
| 1793 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | } |
| 1795 | return err; |
| 1796 | } |
| 1797 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | /* |
| 1799 | * Shutdown a socket. |
| 1800 | */ |
| 1801 | |
Heiko Carstens | 754fe8d | 2009-01-14 14:14:09 +0100 | [diff] [blame] | 1802 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1804 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | struct socket *sock; |
| 1806 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1807 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1808 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1809 | err = security_socket_shutdown(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1810 | if (!err) |
| 1811 | err = sock->ops->shutdown(sock, how); |
| 1812 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | } |
| 1814 | return err; |
| 1815 | } |
| 1816 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1817 | /* 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] | 1818 | * fields which are the same type (int / unsigned) on our platforms. |
| 1819 | */ |
| 1820 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 1821 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 1822 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 1823 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1824 | struct used_address { |
| 1825 | struct sockaddr_storage name; |
| 1826 | unsigned int name_len; |
| 1827 | }; |
| 1828 | |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 1829 | static int copy_msghdr_from_user(struct msghdr *kmsg, |
| 1830 | struct user_msghdr __user *umsg, |
| 1831 | struct sockaddr __user **save_addr, |
| 1832 | struct iovec **iov) |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 1833 | { |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1834 | struct sockaddr __user *uaddr; |
| 1835 | struct iovec __user *uiov; |
Al Viro | c0371da | 2014-11-24 10:42:55 -0500 | [diff] [blame] | 1836 | size_t nr_segs; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1837 | ssize_t err; |
| 1838 | |
| 1839 | if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || |
| 1840 | __get_user(uaddr, &umsg->msg_name) || |
| 1841 | __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || |
| 1842 | __get_user(uiov, &umsg->msg_iov) || |
Al Viro | c0371da | 2014-11-24 10:42:55 -0500 | [diff] [blame] | 1843 | __get_user(nr_segs, &umsg->msg_iovlen) || |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1844 | __get_user(kmsg->msg_control, &umsg->msg_control) || |
| 1845 | __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || |
| 1846 | __get_user(kmsg->msg_flags, &umsg->msg_flags)) |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 1847 | return -EFAULT; |
Matthew Leach | dbb490b | 2014-03-11 11:58:27 +0000 | [diff] [blame] | 1848 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1849 | if (!uaddr) |
Ani Sinha | 6a2a2b3 | 2014-09-08 14:49:59 -0700 | [diff] [blame] | 1850 | kmsg->msg_namelen = 0; |
| 1851 | |
Matthew Leach | dbb490b | 2014-03-11 11:58:27 +0000 | [diff] [blame] | 1852 | if (kmsg->msg_namelen < 0) |
| 1853 | return -EINVAL; |
| 1854 | |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 1855 | if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) |
Dan Carpenter | db31c55 | 2013-11-27 15:40:21 +0300 | [diff] [blame] | 1856 | kmsg->msg_namelen = sizeof(struct sockaddr_storage); |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1857 | |
| 1858 | if (save_addr) |
| 1859 | *save_addr = uaddr; |
| 1860 | |
| 1861 | if (uaddr && kmsg->msg_namelen) { |
| 1862 | if (!save_addr) { |
| 1863 | err = move_addr_to_kernel(uaddr, kmsg->msg_namelen, |
| 1864 | kmsg->msg_name); |
| 1865 | if (err < 0) |
| 1866 | return err; |
| 1867 | } |
| 1868 | } else { |
| 1869 | kmsg->msg_name = NULL; |
| 1870 | kmsg->msg_namelen = 0; |
| 1871 | } |
| 1872 | |
Al Viro | c0371da | 2014-11-24 10:42:55 -0500 | [diff] [blame] | 1873 | if (nr_segs > UIO_MAXIOV) |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1874 | return -EMSGSIZE; |
| 1875 | |
tadeusz.struk@intel.com | 0345f93 | 2015-03-19 12:31:25 -0700 | [diff] [blame] | 1876 | kmsg->msg_iocb = NULL; |
| 1877 | |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 1878 | return import_iovec(save_addr ? READ : WRITE, uiov, nr_segs, |
| 1879 | UIO_FASTIOV, iov, &kmsg->msg_iter); |
Dan Carpenter | 1661bf3 | 2013-10-03 00:27:20 +0300 | [diff] [blame] | 1880 | } |
| 1881 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 1882 | static int ___sys_sendmsg(struct socket *sock, struct user_msghdr __user *msg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 1883 | struct msghdr *msg_sys, unsigned int flags, |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 1884 | struct used_address *used_address, |
| 1885 | unsigned int allowed_msghdr_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1887 | struct compat_msghdr __user *msg_compat = |
| 1888 | (struct compat_msghdr __user *)msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1889 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 1891 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1892 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
| 1893 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1894 | unsigned char *ctl_buf = ctl; |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 1895 | int ctl_len; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1896 | ssize_t err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1897 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1898 | msg_sys->msg_name = &address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1899 | |
Al Viro | 0844932 | 2014-11-09 22:33:45 -0500 | [diff] [blame] | 1900 | if (MSG_CMSG_COMPAT & flags) |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1901 | err = get_compat_msghdr(msg_sys, msg_compat, NULL, &iov); |
Al Viro | 0844932 | 2014-11-09 22:33:45 -0500 | [diff] [blame] | 1902 | else |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 1903 | err = copy_msghdr_from_user(msg_sys, msg, NULL, &iov); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1904 | if (err < 0) |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 1905 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | |
| 1907 | err = -ENOBUFS; |
| 1908 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1909 | if (msg_sys->msg_controllen > INT_MAX) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1910 | goto out_freeiov; |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 1911 | flags |= (msg_sys->msg_flags & allowed_msghdr_flags); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1912 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1914 | err = |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1915 | cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1916 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1917 | if (err) |
| 1918 | goto out_freeiov; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1919 | ctl_buf = msg_sys->msg_control; |
| 1920 | ctl_len = msg_sys->msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1921 | } else if (ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1922 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1923 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1924 | if (ctl_buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | goto out_freeiov; |
| 1926 | } |
| 1927 | err = -EFAULT; |
| 1928 | /* |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1929 | * Careful! Before this, msg_sys->msg_control contains a user pointer. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
| 1931 | * checking falls down on this. |
| 1932 | */ |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 1933 | if (copy_from_user(ctl_buf, |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1934 | (void __user __force *)msg_sys->msg_control, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1935 | ctl_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | goto out_freectl; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1937 | msg_sys->msg_control = ctl_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | } |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1939 | msg_sys->msg_flags = flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | |
| 1941 | if (sock->file->f_flags & O_NONBLOCK) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1942 | msg_sys->msg_flags |= MSG_DONTWAIT; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1943 | /* |
| 1944 | * If this is sendmmsg() and current destination address is same as |
| 1945 | * previously succeeded address, omit asking LSM's decision. |
| 1946 | * used_address->name_len is initialized to UINT_MAX so that the first |
| 1947 | * destination address never matches. |
| 1948 | */ |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 1949 | if (used_address && msg_sys->msg_name && |
| 1950 | used_address->name_len == msg_sys->msg_namelen && |
| 1951 | !memcmp(&used_address->name, msg_sys->msg_name, |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1952 | used_address->name_len)) { |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 1953 | err = sock_sendmsg_nosec(sock, msg_sys); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1954 | goto out_freectl; |
| 1955 | } |
Al Viro | d8725c8 | 2014-12-11 00:02:50 -0500 | [diff] [blame] | 1956 | err = sock_sendmsg(sock, msg_sys); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1957 | /* |
| 1958 | * If this is sendmmsg() and sending to current destination address was |
| 1959 | * successful, remember it. |
| 1960 | */ |
| 1961 | if (used_address && err >= 0) { |
| 1962 | used_address->name_len = msg_sys->msg_namelen; |
Mathieu Desnoyers | bc909d9 | 2011-08-24 19:45:03 -0700 | [diff] [blame] | 1963 | if (msg_sys->msg_name) |
| 1964 | memcpy(&used_address->name, msg_sys->msg_name, |
| 1965 | used_address->name_len); |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 1966 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1967 | |
| 1968 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1969 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
| 1971 | out_freeiov: |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 1972 | kfree(iov); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1973 | return err; |
| 1974 | } |
| 1975 | |
| 1976 | /* |
| 1977 | * BSD sendmsg interface |
| 1978 | */ |
| 1979 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 1980 | long __sys_sendmsg(int fd, struct user_msghdr __user *msg, unsigned flags) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1981 | { |
| 1982 | int fput_needed, err; |
| 1983 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 1984 | struct socket *sock; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1985 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 1986 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1987 | if (!sock) |
| 1988 | goto out; |
| 1989 | |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 1990 | err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL, 0); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 1991 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1992 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1993 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | return err; |
| 1995 | } |
| 1996 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 1997 | 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] | 1998 | { |
| 1999 | if (flags & MSG_CMSG_COMPAT) |
| 2000 | return -EINVAL; |
| 2001 | return __sys_sendmsg(fd, msg, flags); |
| 2002 | } |
| 2003 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2004 | /* |
| 2005 | * Linux sendmmsg interface |
| 2006 | */ |
| 2007 | |
| 2008 | int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2009 | unsigned int flags) |
| 2010 | { |
| 2011 | int fput_needed, err, datagrams; |
| 2012 | struct socket *sock; |
| 2013 | struct mmsghdr __user *entry; |
| 2014 | struct compat_mmsghdr __user *compat_entry; |
| 2015 | struct msghdr msg_sys; |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2016 | struct used_address used_address; |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2017 | unsigned int oflags = flags; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2018 | |
Anton Blanchard | 98382f4 | 2011-08-04 14:07:39 +0000 | [diff] [blame] | 2019 | if (vlen > UIO_MAXIOV) |
| 2020 | vlen = UIO_MAXIOV; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2021 | |
| 2022 | datagrams = 0; |
| 2023 | |
| 2024 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2025 | if (!sock) |
| 2026 | return err; |
| 2027 | |
Tetsuo Handa | c71d8eb | 2011-08-04 14:07:40 +0000 | [diff] [blame] | 2028 | used_address.name_len = UINT_MAX; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2029 | entry = mmsg; |
| 2030 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2031 | err = 0; |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2032 | flags |= MSG_BATCH; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2033 | |
| 2034 | while (datagrams < vlen) { |
Tom Herbert | f092276 | 2016-03-07 14:11:03 -0800 | [diff] [blame] | 2035 | if (datagrams == vlen - 1) |
| 2036 | flags = oflags; |
| 2037 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2038 | if (MSG_CMSG_COMPAT & flags) { |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2039 | err = ___sys_sendmsg(sock, (struct user_msghdr __user *)compat_entry, |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2040 | &msg_sys, flags, &used_address, MSG_EOR); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2041 | if (err < 0) |
| 2042 | break; |
| 2043 | err = __put_user(err, &compat_entry->msg_len); |
| 2044 | ++compat_entry; |
| 2045 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2046 | err = ___sys_sendmsg(sock, |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2047 | (struct user_msghdr __user *)entry, |
Tom Herbert | 28a94d8 | 2016-03-07 14:11:02 -0800 | [diff] [blame] | 2048 | &msg_sys, flags, &used_address, MSG_EOR); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2049 | if (err < 0) |
| 2050 | break; |
| 2051 | err = put_user(err, &entry->msg_len); |
| 2052 | ++entry; |
| 2053 | } |
| 2054 | |
| 2055 | if (err) |
| 2056 | break; |
| 2057 | ++datagrams; |
Soheil Hassas Yeganeh | 3023898 | 2016-11-04 15:36:49 -0400 | [diff] [blame] | 2058 | if (msg_data_left(&msg_sys)) |
| 2059 | break; |
Eric Dumazet | a78cb84 | 2016-01-08 08:37:20 -0800 | [diff] [blame] | 2060 | cond_resched(); |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2061 | } |
| 2062 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2063 | fput_light(sock->file, fput_needed); |
| 2064 | |
Anton Blanchard | 728ffb8 | 2011-08-04 14:07:38 +0000 | [diff] [blame] | 2065 | /* We only return an error if no datagrams were able to be sent */ |
| 2066 | if (datagrams != 0) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2067 | return datagrams; |
| 2068 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2069 | return err; |
| 2070 | } |
| 2071 | |
| 2072 | SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2073 | unsigned int, vlen, unsigned int, flags) |
| 2074 | { |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2075 | if (flags & MSG_CMSG_COMPAT) |
| 2076 | return -EINVAL; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2077 | return __sys_sendmmsg(fd, mmsg, vlen, flags); |
| 2078 | } |
| 2079 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2080 | static int ___sys_recvmsg(struct socket *sock, struct user_msghdr __user *msg, |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 2081 | struct msghdr *msg_sys, unsigned int flags, int nosec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2082 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2083 | struct compat_msghdr __user *msg_compat = |
| 2084 | (struct compat_msghdr __user *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | struct iovec iovstack[UIO_FASTIOV]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2086 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | unsigned long cmsg_ptr; |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 2088 | int len; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2089 | ssize_t err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | |
| 2091 | /* kernel mode address */ |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2092 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2093 | |
| 2094 | /* user mode address pointers */ |
| 2095 | struct sockaddr __user *uaddr; |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2096 | int __user *uaddr_len = COMPAT_NAMELEN(msg); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2097 | |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2098 | msg_sys->msg_name = &addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2100 | if (MSG_CMSG_COMPAT & flags) |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2101 | err = get_compat_msghdr(msg_sys, msg_compat, &uaddr, &iov); |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2102 | else |
Al Viro | 08adb7d | 2014-11-10 20:23:13 -0500 | [diff] [blame] | 2103 | err = copy_msghdr_from_user(msg_sys, msg, &uaddr, &iov); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | if (err < 0) |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 2105 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2107 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
| 2108 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2109 | |
Hannes Frederic Sowa | f3d3342 | 2013-11-21 03:14:22 +0100 | [diff] [blame] | 2110 | /* We assume all kernel code knows the size of sockaddr_storage */ |
| 2111 | msg_sys->msg_namelen = 0; |
| 2112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | if (sock->file->f_flags & O_NONBLOCK) |
| 2114 | flags |= MSG_DONTWAIT; |
Al Viro | 2da6290 | 2015-03-14 21:13:46 -0400 | [diff] [blame] | 2115 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | if (err < 0) |
| 2117 | goto out_freeiov; |
| 2118 | len = err; |
| 2119 | |
| 2120 | if (uaddr != NULL) { |
Maciej Żenczykowski | 43db362 | 2012-03-11 12:51:50 +0000 | [diff] [blame] | 2121 | err = move_addr_to_user(&addr, |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2122 | msg_sys->msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2123 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2124 | if (err < 0) |
| 2125 | goto out_freeiov; |
| 2126 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2127 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2128 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | if (err) |
| 2130 | goto out_freeiov; |
| 2131 | if (MSG_CMSG_COMPAT & flags) |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2132 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | &msg_compat->msg_controllen); |
| 2134 | else |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2135 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | &msg->msg_controllen); |
| 2137 | if (err) |
| 2138 | goto out_freeiov; |
| 2139 | err = len; |
| 2140 | |
| 2141 | out_freeiov: |
Al Viro | da18428 | 2015-03-21 19:29:06 -0400 | [diff] [blame] | 2142 | kfree(iov); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2143 | return err; |
| 2144 | } |
| 2145 | |
| 2146 | /* |
| 2147 | * BSD recvmsg interface |
| 2148 | */ |
| 2149 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2150 | 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] | 2151 | { |
| 2152 | int fput_needed, err; |
| 2153 | struct msghdr msg_sys; |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2154 | struct socket *sock; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2155 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2156 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2157 | if (!sock) |
| 2158 | goto out; |
| 2159 | |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2160 | err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2161 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2162 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | out: |
| 2164 | return err; |
| 2165 | } |
| 2166 | |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2167 | SYSCALL_DEFINE3(recvmsg, int, fd, struct user_msghdr __user *, msg, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2168 | unsigned int, flags) |
| 2169 | { |
| 2170 | if (flags & MSG_CMSG_COMPAT) |
| 2171 | return -EINVAL; |
| 2172 | return __sys_recvmsg(fd, msg, flags); |
| 2173 | } |
| 2174 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2175 | /* |
| 2176 | * Linux recvmmsg interface |
| 2177 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2178 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2179 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, |
| 2180 | unsigned int flags, struct timespec *timeout) |
| 2181 | { |
| 2182 | int fput_needed, err, datagrams; |
| 2183 | struct socket *sock; |
| 2184 | struct mmsghdr __user *entry; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2185 | struct compat_mmsghdr __user *compat_entry; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2186 | struct msghdr msg_sys; |
Deepa Dinamani | 766b9f9 | 2016-05-19 17:09:05 -0700 | [diff] [blame] | 2187 | struct timespec64 end_time; |
| 2188 | struct timespec64 timeout64; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2189 | |
| 2190 | if (timeout && |
| 2191 | poll_select_set_timeout(&end_time, timeout->tv_sec, |
| 2192 | timeout->tv_nsec)) |
| 2193 | return -EINVAL; |
| 2194 | |
| 2195 | datagrams = 0; |
| 2196 | |
| 2197 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 2198 | if (!sock) |
| 2199 | return err; |
| 2200 | |
| 2201 | err = sock_error(sock->sk); |
Maxime Jayat | 1a0e259 | 2017-02-21 18:35:51 +0100 | [diff] [blame] | 2202 | if (err) { |
| 2203 | datagrams = err; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2204 | goto out_put; |
Maxime Jayat | 1a0e259 | 2017-02-21 18:35:51 +0100 | [diff] [blame] | 2205 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2206 | |
| 2207 | entry = mmsg; |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2208 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2209 | |
| 2210 | while (datagrams < vlen) { |
| 2211 | /* |
| 2212 | * No need to ask LSM for more than the first datagram. |
| 2213 | */ |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2214 | if (MSG_CMSG_COMPAT & flags) { |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2215 | err = ___sys_recvmsg(sock, (struct user_msghdr __user *)compat_entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2216 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2217 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2218 | if (err < 0) |
| 2219 | break; |
| 2220 | err = __put_user(err, &compat_entry->msg_len); |
| 2221 | ++compat_entry; |
| 2222 | } else { |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2223 | err = ___sys_recvmsg(sock, |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2224 | (struct user_msghdr __user *)entry, |
Andy Lutomirski | a7526eb | 2013-06-05 19:38:26 +0000 | [diff] [blame] | 2225 | &msg_sys, flags & ~MSG_WAITFORONE, |
| 2226 | datagrams); |
Jean-Mickael Guerin | d7256d0 | 2009-12-01 08:47:26 +0000 | [diff] [blame] | 2227 | if (err < 0) |
| 2228 | break; |
| 2229 | err = put_user(err, &entry->msg_len); |
| 2230 | ++entry; |
| 2231 | } |
| 2232 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2233 | if (err) |
| 2234 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2235 | ++datagrams; |
| 2236 | |
Brandon L Black | 71c5c15 | 2010-03-26 16:18:03 +0000 | [diff] [blame] | 2237 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
| 2238 | if (flags & MSG_WAITFORONE) |
| 2239 | flags |= MSG_DONTWAIT; |
| 2240 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2241 | if (timeout) { |
Deepa Dinamani | 766b9f9 | 2016-05-19 17:09:05 -0700 | [diff] [blame] | 2242 | ktime_get_ts64(&timeout64); |
| 2243 | *timeout = timespec64_to_timespec( |
| 2244 | timespec64_sub(end_time, timeout64)); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2245 | if (timeout->tv_sec < 0) { |
| 2246 | timeout->tv_sec = timeout->tv_nsec = 0; |
| 2247 | break; |
| 2248 | } |
| 2249 | |
| 2250 | /* Timeout, return less than vlen datagrams */ |
| 2251 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) |
| 2252 | break; |
| 2253 | } |
| 2254 | |
| 2255 | /* Out of band data, return right away */ |
| 2256 | if (msg_sys.msg_flags & MSG_OOB) |
| 2257 | break; |
Eric Dumazet | a78cb84 | 2016-01-08 08:37:20 -0800 | [diff] [blame] | 2258 | cond_resched(); |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2259 | } |
| 2260 | |
Arnaldo Carvalho de Melo | 34b88a6 | 2016-03-14 09:56:35 -0300 | [diff] [blame] | 2261 | if (err == 0) |
| 2262 | goto out_put; |
| 2263 | |
| 2264 | if (datagrams == 0) { |
| 2265 | datagrams = err; |
| 2266 | goto out_put; |
| 2267 | } |
| 2268 | |
| 2269 | /* |
| 2270 | * We may return less entries than requested (vlen) if the |
| 2271 | * sock is non block and there aren't enough datagrams... |
| 2272 | */ |
| 2273 | if (err != -EAGAIN) { |
| 2274 | /* |
| 2275 | * ... or if recvmsg returns an error after we |
| 2276 | * received some datagrams, where we record the |
| 2277 | * error to return on the next call or if the |
| 2278 | * app asks about it using getsockopt(SO_ERROR). |
| 2279 | */ |
| 2280 | sock->sk->sk_err = -err; |
| 2281 | } |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2282 | out_put: |
| 2283 | fput_light(sock->file, fput_needed); |
| 2284 | |
Arnaldo Carvalho de Melo | 34b88a6 | 2016-03-14 09:56:35 -0300 | [diff] [blame] | 2285 | return datagrams; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2286 | } |
| 2287 | |
| 2288 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, |
| 2289 | unsigned int, vlen, unsigned int, flags, |
| 2290 | struct timespec __user *, timeout) |
| 2291 | { |
| 2292 | int datagrams; |
| 2293 | struct timespec timeout_sys; |
| 2294 | |
Andy Lutomirski | 1be374a | 2013-05-22 14:07:44 -0700 | [diff] [blame] | 2295 | if (flags & MSG_CMSG_COMPAT) |
| 2296 | return -EINVAL; |
| 2297 | |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2298 | if (!timeout) |
| 2299 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); |
| 2300 | |
| 2301 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) |
| 2302 | return -EFAULT; |
| 2303 | |
| 2304 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); |
| 2305 | |
| 2306 | if (datagrams > 0 && |
| 2307 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) |
| 2308 | datagrams = -EFAULT; |
| 2309 | |
| 2310 | return datagrams; |
| 2311 | } |
| 2312 | |
| 2313 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2314 | /* Argument list sizes for sys_socketcall */ |
| 2315 | #define AL(x) ((x) * sizeof(unsigned long)) |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2316 | static const unsigned char nargs[21] = { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2317 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
| 2318 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), |
| 2319 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2320 | AL(4), AL(5), AL(4) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2321 | }; |
| 2322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2323 | #undef AL |
| 2324 | |
| 2325 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2326 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2327 | * |
| 2328 | * Argument checking cleaned up. Saved 20% in size. |
| 2329 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2330 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | */ |
| 2332 | |
Heiko Carstens | 3e0fa65 | 2009-01-14 14:14:24 +0100 | [diff] [blame] | 2333 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2334 | { |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 2335 | unsigned long a[AUDITSC_ARGS]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2336 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2337 | int err; |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2338 | unsigned int len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2339 | |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2340 | if (call < 1 || call > SYS_SENDMMSG) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2341 | return -EINVAL; |
Jeremy Cline | 9a492f8 | 2018-07-27 22:43:01 +0000 | [diff] [blame] | 2342 | call = array_index_nospec(call, SYS_SENDMMSG + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2343 | |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2344 | len = nargs[call]; |
| 2345 | if (len > sizeof(a)) |
| 2346 | return -EINVAL; |
| 2347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2348 | /* copy_from_user should be SMP safe. */ |
Arjan van de Ven | 4737905 | 2009-09-28 12:57:44 -0700 | [diff] [blame] | 2349 | if (copy_from_user(a, args, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2350 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2351 | |
Chen Gang | 2950fa9 | 2013-04-07 16:55:23 +0800 | [diff] [blame] | 2352 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
| 2353 | if (err) |
| 2354 | return err; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2355 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2356 | a0 = a[0]; |
| 2357 | a1 = a[1]; |
| 2358 | |
| 2359 | switch (call) { |
| 2360 | case SYS_SOCKET: |
| 2361 | err = sys_socket(a0, a1, a[2]); |
| 2362 | break; |
| 2363 | case SYS_BIND: |
| 2364 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
| 2365 | break; |
| 2366 | case SYS_CONNECT: |
| 2367 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
| 2368 | break; |
| 2369 | case SYS_LISTEN: |
| 2370 | err = sys_listen(a0, a1); |
| 2371 | break; |
| 2372 | case SYS_ACCEPT: |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2373 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2374 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2375 | break; |
| 2376 | case SYS_GETSOCKNAME: |
| 2377 | err = |
| 2378 | sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 2379 | (int __user *)a[2]); |
| 2380 | break; |
| 2381 | case SYS_GETPEERNAME: |
| 2382 | err = |
| 2383 | sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 2384 | (int __user *)a[2]); |
| 2385 | break; |
| 2386 | case SYS_SOCKETPAIR: |
| 2387 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
| 2388 | break; |
| 2389 | case SYS_SEND: |
| 2390 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); |
| 2391 | break; |
| 2392 | case SYS_SENDTO: |
| 2393 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 2394 | (struct sockaddr __user *)a[4], a[5]); |
| 2395 | break; |
| 2396 | case SYS_RECV: |
| 2397 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); |
| 2398 | break; |
| 2399 | case SYS_RECVFROM: |
| 2400 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 2401 | (struct sockaddr __user *)a[4], |
| 2402 | (int __user *)a[5]); |
| 2403 | break; |
| 2404 | case SYS_SHUTDOWN: |
| 2405 | err = sys_shutdown(a0, a1); |
| 2406 | break; |
| 2407 | case SYS_SETSOCKOPT: |
| 2408 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
| 2409 | break; |
| 2410 | case SYS_GETSOCKOPT: |
| 2411 | err = |
| 2412 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 2413 | (int __user *)a[4]); |
| 2414 | break; |
| 2415 | case SYS_SENDMSG: |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2416 | err = sys_sendmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2417 | break; |
Anton Blanchard | 228e548 | 2011-05-02 20:21:35 +0000 | [diff] [blame] | 2418 | case SYS_SENDMMSG: |
| 2419 | err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); |
| 2420 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2421 | case SYS_RECVMSG: |
Al Viro | 666547f | 2014-04-06 14:03:05 -0400 | [diff] [blame] | 2422 | err = sys_recvmsg(a0, (struct user_msghdr __user *)a1, a[2]); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2423 | break; |
Arnaldo Carvalho de Melo | a2e2725 | 2009-10-12 23:40:10 -0700 | [diff] [blame] | 2424 | case SYS_RECVMMSG: |
| 2425 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], |
| 2426 | (struct timespec __user *)a[4]); |
| 2427 | break; |
Ulrich Drepper | de11def | 2008-11-19 15:36:14 -0800 | [diff] [blame] | 2428 | case SYS_ACCEPT4: |
| 2429 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
| 2430 | (int __user *)a[2], a[3]); |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2431 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2432 | default: |
| 2433 | err = -EINVAL; |
| 2434 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2435 | } |
| 2436 | return err; |
| 2437 | } |
| 2438 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2439 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2440 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2441 | /** |
| 2442 | * sock_register - add a socket protocol handler |
| 2443 | * @ops: description of protocol |
| 2444 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2445 | * This function is called by a protocol handler that wants to |
| 2446 | * advertise its address family, and have it linked into the |
Masanari Iida | e793c0f | 2014-09-04 23:44:36 +0900 | [diff] [blame] | 2447 | * socket interface. The value ops->family corresponds to the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2448 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2449 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2450 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2451 | { |
| 2452 | int err; |
| 2453 | |
| 2454 | if (ops->family >= NPROTO) { |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 2455 | pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2456 | return -ENOBUFS; |
| 2457 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2458 | |
| 2459 | spin_lock(&net_family_lock); |
Eric Dumazet | 190683a | 2010-11-10 10:50:44 +0000 | [diff] [blame] | 2460 | if (rcu_dereference_protected(net_families[ops->family], |
| 2461 | lockdep_is_held(&net_family_lock))) |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2462 | err = -EEXIST; |
| 2463 | else { |
Eric Dumazet | cf778b0 | 2012-01-12 04:41:32 +0000 | [diff] [blame] | 2464 | rcu_assign_pointer(net_families[ops->family], ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2465 | err = 0; |
| 2466 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2467 | spin_unlock(&net_family_lock); |
| 2468 | |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 2469 | pr_info("NET: Registered protocol family %d\n", ops->family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2470 | return err; |
| 2471 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2472 | EXPORT_SYMBOL(sock_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2474 | /** |
| 2475 | * sock_unregister - remove a protocol handler |
| 2476 | * @family: protocol family to remove |
| 2477 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2478 | * This function is called by a protocol handler that wants to |
| 2479 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2480 | * new socket creation. |
| 2481 | * |
| 2482 | * If protocol handler is a module, then it can use module reference |
| 2483 | * counts to protect against new references. If protocol handler is not |
| 2484 | * a module then it needs to provide its own protection in |
| 2485 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2486 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2487 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2488 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2489 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2491 | spin_lock(&net_family_lock); |
Stephen Hemminger | a9b3cd7 | 2011-08-01 16:19:00 +0000 | [diff] [blame] | 2492 | RCU_INIT_POINTER(net_families[family], NULL); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2493 | spin_unlock(&net_family_lock); |
| 2494 | |
| 2495 | synchronize_rcu(); |
| 2496 | |
Yang Yingliang | 3410f22 | 2014-02-12 17:09:55 +0800 | [diff] [blame] | 2497 | pr_info("NET: Unregistered protocol family %d\n", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2498 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2499 | EXPORT_SYMBOL(sock_unregister); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2500 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2501 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2502 | { |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2503 | int err; |
Eric W. Biederman | 2ca794e | 2012-04-19 13:20:32 +0000 | [diff] [blame] | 2504 | /* |
| 2505 | * Initialize the network sysctl infrastructure. |
| 2506 | */ |
| 2507 | err = net_sysctl_init(); |
| 2508 | if (err) |
| 2509 | goto out; |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2511 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2512 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2513 | */ |
| 2514 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2515 | |
| 2516 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2517 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2518 | */ |
| 2519 | |
| 2520 | init_inodecache(); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2521 | |
| 2522 | err = register_filesystem(&sock_fs_type); |
| 2523 | if (err) |
| 2524 | goto out_fs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2525 | sock_mnt = kern_mount(&sock_fs_type); |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2526 | if (IS_ERR(sock_mnt)) { |
| 2527 | err = PTR_ERR(sock_mnt); |
| 2528 | goto out_mount; |
| 2529 | } |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2530 | |
| 2531 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2532 | */ |
| 2533 | |
| 2534 | #ifdef CONFIG_NETFILTER |
Pablo Neira Ayuso | 6d11cfd | 2013-05-22 22:42:36 +0000 | [diff] [blame] | 2535 | err = netfilter_init(); |
| 2536 | if (err) |
| 2537 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2538 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 2539 | |
Daniel Borkmann | 408eccc | 2014-04-01 16:20:23 +0200 | [diff] [blame] | 2540 | ptp_classifier_init(); |
Richard Cochran | c1f19b5 | 2010-07-17 08:49:36 +0000 | [diff] [blame] | 2541 | |
Nick Piggin | b3e19d9 | 2011-01-07 17:50:11 +1100 | [diff] [blame] | 2542 | out: |
| 2543 | return err; |
| 2544 | |
| 2545 | out_mount: |
| 2546 | unregister_filesystem(&sock_fs_type); |
| 2547 | out_fs: |
| 2548 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2549 | } |
| 2550 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2551 | core_initcall(sock_init); /* early initcall */ |
| 2552 | |
Alexei Starovoitov | a3d6dd6 | 2018-01-29 02:48:56 +0100 | [diff] [blame] | 2553 | static int __init jit_init(void) |
| 2554 | { |
| 2555 | #ifdef CONFIG_BPF_JIT_ALWAYS_ON |
| 2556 | bpf_jit_enable = 1; |
| 2557 | #endif |
| 2558 | return 0; |
| 2559 | } |
| 2560 | pure_initcall(jit_init); |
| 2561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2562 | #ifdef CONFIG_PROC_FS |
| 2563 | void socket_seq_show(struct seq_file *seq) |
| 2564 | { |
| 2565 | int cpu; |
| 2566 | int counter = 0; |
| 2567 | |
KAMEZAWA Hiroyuki | 6f91204 | 2006-04-10 22:52:50 -0700 | [diff] [blame] | 2568 | for_each_possible_cpu(cpu) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2569 | counter += per_cpu(sockets_in_use, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2570 | |
| 2571 | /* It can be negative, by the way. 8) */ |
| 2572 | if (counter < 0) |
| 2573 | counter = 0; |
| 2574 | |
| 2575 | seq_printf(seq, "sockets: used %d\n", counter); |
| 2576 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2577 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2578 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2579 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2580 | static int do_siocgstamp(struct net *net, struct socket *sock, |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2581 | unsigned int cmd, void __user *up) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2582 | { |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2583 | mm_segment_t old_fs = get_fs(); |
| 2584 | struct timeval ktv; |
| 2585 | int err; |
| 2586 | |
| 2587 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2588 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2589 | set_fs(old_fs); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2590 | if (!err) |
Mikulas Patocka | ed6fe9d | 2012-09-01 12:34:07 -0400 | [diff] [blame] | 2591 | err = compat_put_timeval(&ktv, up); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2592 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2593 | return err; |
| 2594 | } |
| 2595 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2596 | static int do_siocgstampns(struct net *net, struct socket *sock, |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2597 | unsigned int cmd, void __user *up) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2598 | { |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2599 | mm_segment_t old_fs = get_fs(); |
| 2600 | struct timespec kts; |
| 2601 | int err; |
| 2602 | |
| 2603 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2604 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2605 | set_fs(old_fs); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2606 | if (!err) |
Mikulas Patocka | ed6fe9d | 2012-09-01 12:34:07 -0400 | [diff] [blame] | 2607 | err = compat_put_timespec(&kts, up); |
H. Peter Anvin | 644595f | 2012-02-19 17:51:59 -0800 | [diff] [blame] | 2608 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2609 | return err; |
| 2610 | } |
| 2611 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2612 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2613 | { |
| 2614 | struct ifreq __user *uifr; |
| 2615 | int err; |
| 2616 | |
| 2617 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2618 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2619 | return -EFAULT; |
| 2620 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2621 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2622 | if (err) |
| 2623 | return err; |
| 2624 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2625 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2626 | return -EFAULT; |
| 2627 | |
| 2628 | return 0; |
| 2629 | } |
| 2630 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2631 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2632 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2633 | struct compat_ifconf ifc32; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2634 | struct ifconf ifc; |
| 2635 | struct ifconf __user *uifc; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2636 | struct compat_ifreq __user *ifr32; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2637 | struct ifreq __user *ifr; |
| 2638 | unsigned int i, j; |
| 2639 | int err; |
| 2640 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2641 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2642 | return -EFAULT; |
| 2643 | |
Mathias Krause | 43da5f2 | 2012-08-15 11:31:57 +0000 | [diff] [blame] | 2644 | memset(&ifc, 0, sizeof(ifc)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2645 | if (ifc32.ifcbuf == 0) { |
| 2646 | ifc32.ifc_len = 0; |
| 2647 | ifc.ifc_len = 0; |
| 2648 | ifc.ifc_req = NULL; |
| 2649 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); |
| 2650 | } else { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2651 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
| 2652 | sizeof(struct ifreq); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2653 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
| 2654 | ifc.ifc_len = len; |
| 2655 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); |
| 2656 | ifr32 = compat_ptr(ifc32.ifcbuf); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2657 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2658 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2659 | return -EFAULT; |
| 2660 | ifr++; |
| 2661 | ifr32++; |
| 2662 | } |
| 2663 | } |
| 2664 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) |
| 2665 | return -EFAULT; |
| 2666 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2667 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2668 | if (err) |
| 2669 | return err; |
| 2670 | |
| 2671 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) |
| 2672 | return -EFAULT; |
| 2673 | |
| 2674 | ifr = ifc.ifc_req; |
| 2675 | ifr32 = compat_ptr(ifc32.ifcbuf); |
| 2676 | for (i = 0, j = 0; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2677 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
| 2678 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { |
| 2679 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2680 | return -EFAULT; |
| 2681 | ifr32++; |
| 2682 | ifr++; |
| 2683 | } |
| 2684 | |
| 2685 | if (ifc32.ifcbuf == 0) { |
| 2686 | /* Translate from 64-bit structure multiple to |
| 2687 | * a 32-bit one. |
| 2688 | */ |
| 2689 | i = ifc.ifc_len; |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2690 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2691 | ifc32.ifc_len = i; |
| 2692 | } else { |
| 2693 | ifc32.ifc_len = i; |
| 2694 | } |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2695 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2696 | return -EFAULT; |
| 2697 | |
| 2698 | return 0; |
| 2699 | } |
| 2700 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2701 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2702 | { |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2703 | struct compat_ethtool_rxnfc __user *compat_rxnfc; |
| 2704 | bool convert_in = false, convert_out = false; |
| 2705 | size_t buf_size = ALIGN(sizeof(struct ifreq), 8); |
| 2706 | struct ethtool_rxnfc __user *rxnfc; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2707 | struct ifreq __user *ifr; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2708 | u32 rule_cnt = 0, actual_rule_cnt; |
| 2709 | u32 ethcmd; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2710 | u32 data; |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2711 | int ret; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2712 | |
| 2713 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) |
| 2714 | return -EFAULT; |
| 2715 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2716 | compat_rxnfc = compat_ptr(data); |
| 2717 | |
| 2718 | if (get_user(ethcmd, &compat_rxnfc->cmd)) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2719 | return -EFAULT; |
| 2720 | |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2721 | /* Most ethtool structures are defined without padding. |
| 2722 | * Unfortunately struct ethtool_rxnfc is an exception. |
| 2723 | */ |
| 2724 | switch (ethcmd) { |
| 2725 | default: |
| 2726 | break; |
| 2727 | case ETHTOOL_GRXCLSRLALL: |
| 2728 | /* Buffer size is variable */ |
| 2729 | if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) |
| 2730 | return -EFAULT; |
| 2731 | if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) |
| 2732 | return -ENOMEM; |
| 2733 | buf_size += rule_cnt * sizeof(u32); |
| 2734 | /* fall through */ |
| 2735 | case ETHTOOL_GRXRINGS: |
| 2736 | case ETHTOOL_GRXCLSRLCNT: |
| 2737 | case ETHTOOL_GRXCLSRULE: |
Ben Hutchings | 55664f3 | 2012-01-03 12:04:51 +0000 | [diff] [blame] | 2738 | case ETHTOOL_SRXCLSRLINS: |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2739 | convert_out = true; |
| 2740 | /* fall through */ |
| 2741 | case ETHTOOL_SRXCLSRLDEL: |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2742 | buf_size += sizeof(struct ethtool_rxnfc); |
| 2743 | convert_in = true; |
| 2744 | break; |
| 2745 | } |
| 2746 | |
| 2747 | ifr = compat_alloc_user_space(buf_size); |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2748 | rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2749 | |
| 2750 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) |
| 2751 | return -EFAULT; |
| 2752 | |
| 2753 | if (put_user(convert_in ? rxnfc : compat_ptr(data), |
| 2754 | &ifr->ifr_ifru.ifru_data)) |
| 2755 | return -EFAULT; |
| 2756 | |
| 2757 | if (convert_in) { |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2758 | /* We expect there to be holes between fs.m_ext and |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2759 | * fs.ring_cookie and at the end of fs, but nowhere else. |
| 2760 | */ |
Alexander Duyck | 127fe53 | 2011-04-08 18:01:59 +0000 | [diff] [blame] | 2761 | BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + |
| 2762 | sizeof(compat_rxnfc->fs.m_ext) != |
| 2763 | offsetof(struct ethtool_rxnfc, fs.m_ext) + |
| 2764 | sizeof(rxnfc->fs.m_ext)); |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2765 | BUILD_BUG_ON( |
| 2766 | offsetof(struct compat_ethtool_rxnfc, fs.location) - |
| 2767 | offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != |
| 2768 | offsetof(struct ethtool_rxnfc, fs.location) - |
| 2769 | offsetof(struct ethtool_rxnfc, fs.ring_cookie)); |
| 2770 | |
| 2771 | if (copy_in_user(rxnfc, compat_rxnfc, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2772 | (void __user *)(&rxnfc->fs.m_ext + 1) - |
| 2773 | (void __user *)rxnfc) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2774 | copy_in_user(&rxnfc->fs.ring_cookie, |
| 2775 | &compat_rxnfc->fs.ring_cookie, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2776 | (void __user *)(&rxnfc->fs.location + 1) - |
| 2777 | (void __user *)&rxnfc->fs.ring_cookie) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2778 | copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, |
| 2779 | sizeof(rxnfc->rule_cnt))) |
| 2780 | return -EFAULT; |
| 2781 | } |
| 2782 | |
| 2783 | ret = dev_ioctl(net, SIOCETHTOOL, ifr); |
| 2784 | if (ret) |
| 2785 | return ret; |
| 2786 | |
| 2787 | if (convert_out) { |
| 2788 | if (copy_in_user(compat_rxnfc, rxnfc, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2789 | (const void __user *)(&rxnfc->fs.m_ext + 1) - |
| 2790 | (const void __user *)rxnfc) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2791 | copy_in_user(&compat_rxnfc->fs.ring_cookie, |
| 2792 | &rxnfc->fs.ring_cookie, |
Stephen Hemminger | 954b124 | 2013-02-11 06:22:28 +0000 | [diff] [blame] | 2793 | (const void __user *)(&rxnfc->fs.location + 1) - |
| 2794 | (const void __user *)&rxnfc->fs.ring_cookie) || |
Ben Hutchings | 3a7da39 | 2011-03-17 07:34:32 +0000 | [diff] [blame] | 2795 | copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, |
| 2796 | sizeof(rxnfc->rule_cnt))) |
| 2797 | return -EFAULT; |
| 2798 | |
| 2799 | if (ethcmd == ETHTOOL_GRXCLSRLALL) { |
| 2800 | /* As an optimisation, we only copy the actual |
| 2801 | * number of rules that the underlying |
| 2802 | * function returned. Since Mallory might |
| 2803 | * change the rule count in user memory, we |
| 2804 | * check that it is less than the rule count |
| 2805 | * originally given (as the user buffer size), |
| 2806 | * which has been range-checked. |
| 2807 | */ |
| 2808 | if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) |
| 2809 | return -EFAULT; |
| 2810 | if (actual_rule_cnt < rule_cnt) |
| 2811 | rule_cnt = actual_rule_cnt; |
| 2812 | if (copy_in_user(&compat_rxnfc->rule_locs[0], |
| 2813 | &rxnfc->rule_locs[0], |
| 2814 | rule_cnt * sizeof(u32))) |
| 2815 | return -EFAULT; |
| 2816 | } |
| 2817 | } |
| 2818 | |
| 2819 | return 0; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2820 | } |
| 2821 | |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2822 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
| 2823 | { |
| 2824 | void __user *uptr; |
| 2825 | compat_uptr_t uptr32; |
| 2826 | struct ifreq __user *uifr; |
| 2827 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2828 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 2829 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
| 2830 | return -EFAULT; |
| 2831 | |
| 2832 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) |
| 2833 | return -EFAULT; |
| 2834 | |
| 2835 | uptr = compat_ptr(uptr32); |
| 2836 | |
| 2837 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) |
| 2838 | return -EFAULT; |
| 2839 | |
| 2840 | return dev_ioctl(net, SIOCWANDEV, uifr); |
| 2841 | } |
| 2842 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2843 | static int bond_ioctl(struct net *net, unsigned int cmd, |
| 2844 | struct compat_ifreq __user *ifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2845 | { |
| 2846 | struct ifreq kifr; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2847 | mm_segment_t old_fs; |
| 2848 | int err; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2849 | |
| 2850 | switch (cmd) { |
| 2851 | case SIOCBONDENSLAVE: |
| 2852 | case SIOCBONDRELEASE: |
| 2853 | case SIOCBONDSETHWADDR: |
| 2854 | case SIOCBONDCHANGEACTIVE: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2855 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2856 | return -EFAULT; |
| 2857 | |
| 2858 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2859 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 2860 | err = dev_ioctl(net, cmd, |
| 2861 | (struct ifreq __user __force *) &kifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2862 | set_fs(old_fs); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2863 | |
| 2864 | return err; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2865 | default: |
Linus Torvalds | 07d106d | 2012-01-05 15:40:12 -0800 | [diff] [blame] | 2866 | return -ENOIOCTLCMD; |
Joe Perches | ccbd6a5 | 2010-05-14 10:58:26 +0000 | [diff] [blame] | 2867 | } |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2868 | } |
| 2869 | |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 2870 | /* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */ |
| 2871 | static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd, |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2872 | struct compat_ifreq __user *u_ifreq32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2873 | { |
| 2874 | struct ifreq __user *u_ifreq64; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2875 | char tmp_buf[IFNAMSIZ]; |
| 2876 | void __user *data64; |
| 2877 | u32 data32; |
| 2878 | |
| 2879 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), |
| 2880 | IFNAMSIZ)) |
| 2881 | return -EFAULT; |
Ben Hutchings | 417c352 | 2013-11-18 17:04:58 +0000 | [diff] [blame] | 2882 | if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2883 | return -EFAULT; |
| 2884 | data64 = compat_ptr(data32); |
| 2885 | |
| 2886 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); |
| 2887 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2888 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], |
| 2889 | IFNAMSIZ)) |
| 2890 | return -EFAULT; |
Ben Hutchings | 417c352 | 2013-11-18 17:04:58 +0000 | [diff] [blame] | 2891 | if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2892 | return -EFAULT; |
| 2893 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2894 | return dev_ioctl(net, cmd, u_ifreq64); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2895 | } |
| 2896 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 2897 | static int dev_ifsioc(struct net *net, struct socket *sock, |
| 2898 | unsigned int cmd, struct compat_ifreq __user *uifr32) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2899 | { |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2900 | struct ifreq __user *uifr; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2901 | int err; |
| 2902 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2903 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
| 2904 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) |
| 2905 | return -EFAULT; |
| 2906 | |
| 2907 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); |
| 2908 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2909 | if (!err) { |
| 2910 | switch (cmd) { |
| 2911 | case SIOCGIFFLAGS: |
| 2912 | case SIOCGIFMETRIC: |
| 2913 | case SIOCGIFMTU: |
| 2914 | case SIOCGIFMEM: |
| 2915 | case SIOCGIFHWADDR: |
| 2916 | case SIOCGIFINDEX: |
| 2917 | case SIOCGIFADDR: |
| 2918 | case SIOCGIFBRDADDR: |
| 2919 | case SIOCGIFDSTADDR: |
| 2920 | case SIOCGIFNETMASK: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 2921 | case SIOCGIFPFLAGS: |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2922 | case SIOCGIFTXQLEN: |
Arnd Bergmann | fab2532 | 2009-11-08 20:56:21 -0800 | [diff] [blame] | 2923 | case SIOCGMIIPHY: |
| 2924 | case SIOCGMIIREG: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2925 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2926 | err = -EFAULT; |
| 2927 | break; |
| 2928 | } |
| 2929 | } |
| 2930 | return err; |
| 2931 | } |
| 2932 | |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2933 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
| 2934 | struct compat_ifreq __user *uifr32) |
| 2935 | { |
| 2936 | struct ifreq ifr; |
| 2937 | struct compat_ifmap __user *uifmap32; |
| 2938 | mm_segment_t old_fs; |
| 2939 | int err; |
| 2940 | |
| 2941 | uifmap32 = &uifr32->ifr_ifru.ifru_map; |
| 2942 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 2943 | err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 2944 | err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 2945 | err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 2946 | err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 2947 | err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 2948 | err |= get_user(ifr.ifr_map.port, &uifmap32->port); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2949 | if (err) |
| 2950 | return -EFAULT; |
| 2951 | |
| 2952 | old_fs = get_fs(); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2953 | set_fs(KERNEL_DS); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 2954 | err = dev_ioctl(net, cmd, (void __user __force *)&ifr); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2955 | set_fs(old_fs); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2956 | |
| 2957 | if (cmd == SIOCGIFMAP && !err) { |
| 2958 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 2959 | err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); |
| 2960 | err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); |
| 2961 | err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); |
| 2962 | err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); |
| 2963 | err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); |
| 2964 | err |= put_user(ifr.ifr_map.port, &uifmap32->port); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 2965 | if (err) |
| 2966 | err = -EFAULT; |
| 2967 | } |
| 2968 | return err; |
| 2969 | } |
| 2970 | |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2971 | struct rtentry32 { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2972 | u32 rt_pad1; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2973 | struct sockaddr rt_dst; /* target address */ |
| 2974 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ |
| 2975 | struct sockaddr rt_genmask; /* target network mask (IP) */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2976 | unsigned short rt_flags; |
| 2977 | short rt_pad2; |
| 2978 | u32 rt_pad3; |
| 2979 | unsigned char rt_tos; |
| 2980 | unsigned char rt_class; |
| 2981 | short rt_pad4; |
| 2982 | short rt_metric; /* +1 for binary compatibility! */ |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2983 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 2984 | u32 rt_mtu; /* per route MTU/Window */ |
| 2985 | u32 rt_window; /* Window clamping */ |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 2986 | unsigned short rt_irtt; /* Initial RTT */ |
| 2987 | }; |
| 2988 | |
| 2989 | struct in6_rtmsg32 { |
| 2990 | struct in6_addr rtmsg_dst; |
| 2991 | struct in6_addr rtmsg_src; |
| 2992 | struct in6_addr rtmsg_gateway; |
| 2993 | u32 rtmsg_type; |
| 2994 | u16 rtmsg_dst_len; |
| 2995 | u16 rtmsg_src_len; |
| 2996 | u32 rtmsg_metric; |
| 2997 | u32 rtmsg_info; |
| 2998 | u32 rtmsg_flags; |
| 2999 | s32 rtmsg_ifindex; |
| 3000 | }; |
| 3001 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3002 | static int routing_ioctl(struct net *net, struct socket *sock, |
| 3003 | unsigned int cmd, void __user *argp) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3004 | { |
| 3005 | int ret; |
| 3006 | void *r = NULL; |
| 3007 | struct in6_rtmsg r6; |
| 3008 | struct rtentry r4; |
| 3009 | char devname[16]; |
| 3010 | u32 rtdev; |
| 3011 | mm_segment_t old_fs = get_fs(); |
| 3012 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3013 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
| 3014 | struct in6_rtmsg32 __user *ur6 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3015 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3016 | 3 * sizeof(struct in6_addr)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 3017 | ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
| 3018 | ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); |
| 3019 | ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); |
| 3020 | ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); |
| 3021 | ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); |
| 3022 | ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); |
| 3023 | ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3024 | |
| 3025 | r = (void *) &r6; |
| 3026 | } else { /* ipv4 */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3027 | struct rtentry32 __user *ur4 = argp; |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3028 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3029 | 3 * sizeof(struct sockaddr)); |
Mathieu Desnoyers | 3ddc5b4 | 2013-09-11 14:23:18 -0700 | [diff] [blame] | 3030 | ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); |
| 3031 | ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); |
| 3032 | ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); |
| 3033 | ret |= get_user(r4.rt_window, &(ur4->rt_window)); |
| 3034 | ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); |
| 3035 | ret |= get_user(rtdev, &(ur4->rt_dev)); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3036 | if (rtdev) { |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3037 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
stephen hemminger | c3f52ae | 2011-02-23 09:06:48 +0000 | [diff] [blame] | 3038 | r4.rt_dev = (char __user __force *)devname; |
| 3039 | devname[15] = 0; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3040 | } else |
| 3041 | r4.rt_dev = NULL; |
| 3042 | |
| 3043 | r = (void *) &r4; |
| 3044 | } |
| 3045 | |
| 3046 | if (ret) { |
| 3047 | ret = -EFAULT; |
| 3048 | goto out; |
| 3049 | } |
| 3050 | |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3051 | set_fs(KERNEL_DS); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3052 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3053 | set_fs(old_fs); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3054 | |
| 3055 | out: |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3056 | return ret; |
| 3057 | } |
| 3058 | |
| 3059 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE |
| 3060 | * 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] | 3061 | * use compatible ioctls |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3062 | */ |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3063 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3064 | { |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3065 | compat_ulong_t tmp; |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3066 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3067 | if (get_user(tmp, argp)) |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3068 | return -EFAULT; |
| 3069 | if (tmp == BRCTL_GET_VERSION) |
| 3070 | return BRCTL_VERSION + 1; |
| 3071 | return -EINVAL; |
| 3072 | } |
| 3073 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3074 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
| 3075 | unsigned int cmd, unsigned long arg) |
| 3076 | { |
| 3077 | void __user *argp = compat_ptr(arg); |
| 3078 | struct sock *sk = sock->sk; |
| 3079 | struct net *net = sock_net(sk); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3080 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3081 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3082 | return compat_ifr_data_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3083 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3084 | switch (cmd) { |
| 3085 | case SIOCSIFBR: |
| 3086 | case SIOCGIFBR: |
| 3087 | return old_bridge_ioctl(argp); |
| 3088 | case SIOCGIFNAME: |
| 3089 | return dev_ifname32(net, argp); |
| 3090 | case SIOCGIFCONF: |
| 3091 | return dev_ifconf(net, argp); |
| 3092 | case SIOCETHTOOL: |
| 3093 | return ethtool_ioctl(net, argp); |
Arnd Bergmann | 7a50a24 | 2009-11-08 20:57:03 -0800 | [diff] [blame] | 3094 | case SIOCWANDEV: |
| 3095 | return compat_siocwandev(net, argp); |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3096 | case SIOCGIFMAP: |
| 3097 | case SIOCSIFMAP: |
| 3098 | return compat_sioc_ifmap(net, cmd, argp); |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3099 | case SIOCBONDENSLAVE: |
| 3100 | case SIOCBONDRELEASE: |
| 3101 | case SIOCBONDSETHWADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3102 | case SIOCBONDCHANGEACTIVE: |
| 3103 | return bond_ioctl(net, cmd, argp); |
| 3104 | case SIOCADDRT: |
| 3105 | case SIOCDELRT: |
| 3106 | return routing_ioctl(net, sock, cmd, argp); |
| 3107 | case SIOCGSTAMP: |
| 3108 | return do_siocgstamp(net, sock, cmd, argp); |
| 3109 | case SIOCGSTAMPNS: |
| 3110 | return do_siocgstampns(net, sock, cmd, argp); |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3111 | case SIOCBONDSLAVEINFOQUERY: |
| 3112 | case SIOCBONDINFOQUERY: |
Arnd Bergmann | a2116ed | 2009-11-11 03:39:40 +0000 | [diff] [blame] | 3113 | case SIOCSHWTSTAMP: |
Ben Hutchings | fd468c7 | 2013-11-14 01:19:29 +0000 | [diff] [blame] | 3114 | case SIOCGHWTSTAMP: |
Ben Hutchings | 590d469 | 2013-11-18 17:04:13 +0000 | [diff] [blame] | 3115 | return compat_ifr_data_ioctl(net, cmd, argp); |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3116 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3117 | case FIOSETOWN: |
| 3118 | case SIOCSPGRP: |
| 3119 | case FIOGETOWN: |
| 3120 | case SIOCGPGRP: |
| 3121 | case SIOCBRADDBR: |
| 3122 | case SIOCBRDELBR: |
| 3123 | case SIOCGIFVLAN: |
| 3124 | case SIOCSIFVLAN: |
| 3125 | case SIOCADDDLCI: |
| 3126 | case SIOCDELDLCI: |
| 3127 | return sock_ioctl(file, cmd, arg); |
| 3128 | |
| 3129 | case SIOCGIFFLAGS: |
| 3130 | case SIOCSIFFLAGS: |
| 3131 | case SIOCGIFMETRIC: |
| 3132 | case SIOCSIFMETRIC: |
| 3133 | case SIOCGIFMTU: |
| 3134 | case SIOCSIFMTU: |
| 3135 | case SIOCGIFMEM: |
| 3136 | case SIOCSIFMEM: |
| 3137 | case SIOCGIFHWADDR: |
| 3138 | case SIOCSIFHWADDR: |
| 3139 | case SIOCADDMULTI: |
| 3140 | case SIOCDELMULTI: |
| 3141 | case SIOCGIFINDEX: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3142 | case SIOCGIFADDR: |
| 3143 | case SIOCSIFADDR: |
| 3144 | case SIOCSIFHWBROADCAST: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3145 | case SIOCDIFADDR: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3146 | case SIOCGIFBRDADDR: |
| 3147 | case SIOCSIFBRDADDR: |
| 3148 | case SIOCGIFDSTADDR: |
| 3149 | case SIOCSIFDSTADDR: |
| 3150 | case SIOCGIFNETMASK: |
| 3151 | case SIOCSIFNETMASK: |
| 3152 | case SIOCSIFPFLAGS: |
| 3153 | case SIOCGIFPFLAGS: |
| 3154 | case SIOCGIFTXQLEN: |
| 3155 | case SIOCSIFTXQLEN: |
| 3156 | case SIOCBRADDIF: |
| 3157 | case SIOCBRDELIF: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3158 | case SIOCSIFNAME: |
| 3159 | case SIOCGMIIPHY: |
| 3160 | case SIOCGMIIREG: |
| 3161 | case SIOCSMIIREG: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3162 | return dev_ifsioc(net, sock, cmd, argp); |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3163 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3164 | case SIOCSARP: |
| 3165 | case SIOCGARP: |
| 3166 | case SIOCDARP: |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3167 | case SIOCATMARK: |
Arnd Bergmann | 9177efd | 2009-11-06 08:09:09 +0000 | [diff] [blame] | 3168 | return sock_do_ioctl(net, sock, cmd, arg); |
| 3169 | } |
| 3170 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3171 | return -ENOIOCTLCMD; |
| 3172 | } |
Arnd Bergmann | 7a229387 | 2009-11-06 23:00:29 -0800 | [diff] [blame] | 3173 | |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 3174 | static long compat_sock_ioctl(struct file *file, unsigned int cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 3175 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3176 | { |
| 3177 | struct socket *sock = file->private_data; |
| 3178 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3179 | struct sock *sk; |
| 3180 | struct net *net; |
| 3181 | |
| 3182 | sk = sock->sk; |
| 3183 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3184 | |
| 3185 | if (sock->ops->compat_ioctl) |
| 3186 | ret = sock->ops->compat_ioctl(sock, cmd, arg); |
| 3187 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 3188 | if (ret == -ENOIOCTLCMD && |
| 3189 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 3190 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 3191 | |
Arnd Bergmann | 6b96018 | 2009-11-06 23:10:54 -0800 | [diff] [blame] | 3192 | if (ret == -ENOIOCTLCMD) |
| 3193 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); |
| 3194 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 3195 | return ret; |
| 3196 | } |
| 3197 | #endif |
| 3198 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3199 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 3200 | { |
| 3201 | return sock->ops->bind(sock, addr, addrlen); |
| 3202 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3203 | EXPORT_SYMBOL(kernel_bind); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3204 | |
| 3205 | int kernel_listen(struct socket *sock, int backlog) |
| 3206 | { |
| 3207 | return sock->ops->listen(sock, backlog); |
| 3208 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3209 | EXPORT_SYMBOL(kernel_listen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3210 | |
| 3211 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 3212 | { |
| 3213 | struct sock *sk = sock->sk; |
| 3214 | int err; |
| 3215 | |
| 3216 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 3217 | newsock); |
| 3218 | if (err < 0) |
| 3219 | goto done; |
| 3220 | |
| 3221 | err = sock->ops->accept(sock, *newsock, flags); |
| 3222 | if (err < 0) { |
| 3223 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 3224 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3225 | goto done; |
| 3226 | } |
| 3227 | |
| 3228 | (*newsock)->ops = sock->ops; |
Wei Yongjun | 1b08534 | 2008-12-18 19:35:10 -0800 | [diff] [blame] | 3229 | __module_get((*newsock)->ops->owner); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3230 | |
| 3231 | done: |
| 3232 | return err; |
| 3233 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3234 | EXPORT_SYMBOL(kernel_accept); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3235 | |
| 3236 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 3237 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3238 | { |
| 3239 | return sock->ops->connect(sock, addr, addrlen, flags); |
| 3240 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3241 | EXPORT_SYMBOL(kernel_connect); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3242 | |
| 3243 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
| 3244 | int *addrlen) |
| 3245 | { |
| 3246 | return sock->ops->getname(sock, addr, addrlen, 0); |
| 3247 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3248 | EXPORT_SYMBOL(kernel_getsockname); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3249 | |
| 3250 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
| 3251 | int *addrlen) |
| 3252 | { |
| 3253 | return sock->ops->getname(sock, addr, addrlen, 1); |
| 3254 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3255 | EXPORT_SYMBOL(kernel_getpeername); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3256 | |
| 3257 | int kernel_getsockopt(struct socket *sock, int level, int optname, |
| 3258 | char *optval, int *optlen) |
| 3259 | { |
| 3260 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3261 | char __user *uoptval; |
| 3262 | int __user *uoptlen; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3263 | int err; |
| 3264 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3265 | uoptval = (char __user __force *) optval; |
| 3266 | uoptlen = (int __user __force *) optlen; |
| 3267 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3268 | set_fs(KERNEL_DS); |
| 3269 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3270 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3271 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3272 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
| 3273 | uoptlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3274 | set_fs(oldfs); |
| 3275 | return err; |
| 3276 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3277 | EXPORT_SYMBOL(kernel_getsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3278 | |
| 3279 | int kernel_setsockopt(struct socket *sock, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3280 | char *optval, unsigned int optlen) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3281 | { |
| 3282 | mm_segment_t oldfs = get_fs(); |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3283 | char __user *uoptval; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3284 | int err; |
| 3285 | |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3286 | uoptval = (char __user __force *) optval; |
| 3287 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3288 | set_fs(KERNEL_DS); |
| 3289 | if (level == SOL_SOCKET) |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3290 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3291 | else |
Namhyung Kim | fb8621b | 2010-09-07 03:55:00 +0000 | [diff] [blame] | 3292 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3293 | optlen); |
| 3294 | set_fs(oldfs); |
| 3295 | return err; |
| 3296 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3297 | EXPORT_SYMBOL(kernel_setsockopt); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3298 | |
| 3299 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
| 3300 | size_t size, int flags) |
| 3301 | { |
| 3302 | if (sock->ops->sendpage) |
| 3303 | return sock->ops->sendpage(sock, page, offset, size, flags); |
| 3304 | |
| 3305 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 3306 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3307 | EXPORT_SYMBOL(kernel_sendpage); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3308 | |
| 3309 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
| 3310 | { |
| 3311 | mm_segment_t oldfs = get_fs(); |
| 3312 | int err; |
| 3313 | |
| 3314 | set_fs(KERNEL_DS); |
| 3315 | err = sock->ops->ioctl(sock, cmd, arg); |
| 3316 | set_fs(oldfs); |
| 3317 | |
| 3318 | return err; |
| 3319 | } |
Eric Dumazet | c6d409c | 2010-06-03 20:03:40 -0700 | [diff] [blame] | 3320 | EXPORT_SYMBOL(kernel_sock_ioctl); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 3321 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3322 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 3323 | { |
| 3324 | return sock->ops->shutdown(sock, how); |
| 3325 | } |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 3326 | EXPORT_SYMBOL(kernel_sock_shutdown); |