Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NET An implementation of the SOCKET network access protocol. |
| 3 | * |
| 4 | * Version: @(#)socket.c 1.1.93 18/02/95 |
| 5 | * |
| 6 | * Authors: Orest Zborowski, <obz@Kodak.COM> |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 7 | * Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 9 | * |
| 10 | * Fixes: |
| 11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in |
| 12 | * shutdown() |
| 13 | * Alan Cox : verify_area() fixes |
| 14 | * Alan Cox : Removed DDI |
| 15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug |
| 16 | * Alan Cox : Moved a load of checks to the very |
| 17 | * top level. |
| 18 | * Alan Cox : Move address structures to/from user |
| 19 | * mode above the protocol layers. |
| 20 | * Rob Janssen : Allow 0 length sends. |
| 21 | * Alan Cox : Asynchronous I/O support (cribbed from the |
| 22 | * tty drivers). |
| 23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) |
| 24 | * Jeff Uphoff : Made max number of sockets command-line |
| 25 | * configurable. |
| 26 | * Matti Aarnio : Made the number of sockets dynamic, |
| 27 | * to be allocated when needed, and mr. |
| 28 | * Uphoff's max is used as max to be |
| 29 | * allowed to allocate. |
| 30 | * Linus : Argh. removed all the socket allocation |
| 31 | * altogether: it's in the inode now. |
| 32 | * Alan Cox : Made sock_alloc()/sock_release() public |
| 33 | * for NetROM and future kernel nfsd type |
| 34 | * stuff. |
| 35 | * Alan Cox : sendmsg/recvmsg basics. |
| 36 | * Tom Dyas : Export net symbols. |
| 37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". |
| 38 | * Alan Cox : Added thread locking to sys_* calls |
| 39 | * for sockets. May have errors at the |
| 40 | * moment. |
| 41 | * Kevin Buhr : Fixed the dumb errors in the above. |
| 42 | * Andi Kleen : Some small cleanups, optimizations, |
| 43 | * and fixed a copy_from_user() bug. |
| 44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | * protocol-independent |
| 47 | * |
| 48 | * |
| 49 | * This program is free software; you can redistribute it and/or |
| 50 | * modify it under the terms of the GNU General Public License |
| 51 | * as published by the Free Software Foundation; either version |
| 52 | * 2 of the License, or (at your option) any later version. |
| 53 | * |
| 54 | * |
| 55 | * This module is effectively the top level interface to the BSD socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 56 | * paradigm. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | * |
| 58 | * Based upon Swansea University Computer Society NET3.039 |
| 59 | */ |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | #include <linux/mm.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include <linux/socket.h> |
| 63 | #include <linux/file.h> |
| 64 | #include <linux/net.h> |
| 65 | #include <linux/interrupt.h> |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 66 | #include <linux/thread_info.h> |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 67 | #include <linux/rcupdate.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #include <linux/netdevice.h> |
| 69 | #include <linux/proc_fs.h> |
| 70 | #include <linux/seq_file.h> |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 71 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | #include <linux/wanrouter.h> |
| 73 | #include <linux/if_bridge.h> |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 74 | #include <linux/if_frad.h> |
| 75 | #include <linux/if_vlan.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #include <linux/init.h> |
| 77 | #include <linux/poll.h> |
| 78 | #include <linux/cache.h> |
| 79 | #include <linux/module.h> |
| 80 | #include <linux/highmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | #include <linux/mount.h> |
| 82 | #include <linux/security.h> |
| 83 | #include <linux/syscalls.h> |
| 84 | #include <linux/compat.h> |
| 85 | #include <linux/kmod.h> |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 86 | #include <linux/audit.h> |
Adrian Bunk | d86b5e0 | 2006-01-21 00:46:55 +0100 | [diff] [blame] | 87 | #include <linux/wireless.h> |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 88 | #include <linux/nsproxy.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
| 90 | #include <asm/uaccess.h> |
| 91 | #include <asm/unistd.h> |
| 92 | |
| 93 | #include <net/compat.h> |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 94 | #include <net/wext.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | |
| 96 | #include <net/sock.h> |
| 97 | #include <linux/netfilter.h> |
| 98 | |
| 99 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 100 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 101 | unsigned long nr_segs, loff_t pos); |
| 102 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 103 | unsigned long nr_segs, loff_t pos); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 104 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
| 106 | static int sock_close(struct inode *inode, struct file *file); |
| 107 | static unsigned int sock_poll(struct file *file, |
| 108 | struct poll_table_struct *wait); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 109 | 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] | 110 | #ifdef CONFIG_COMPAT |
| 111 | static long compat_sock_ioctl(struct file *file, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 112 | unsigned int cmd, unsigned long arg); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 113 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | static int sock_fasync(int fd, struct file *filp, int on); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 116 | int offset, size_t size, loff_t *ppos, int more); |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 117 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
| 118 | struct pipe_inode_info *pipe, size_t len, |
| 119 | unsigned int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | /* |
| 122 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear |
| 123 | * in the operation structures but are done directly via the socketcall() multiplexor. |
| 124 | */ |
| 125 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 126 | static const struct file_operations socket_file_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | .owner = THIS_MODULE, |
| 128 | .llseek = no_llseek, |
| 129 | .aio_read = sock_aio_read, |
| 130 | .aio_write = sock_aio_write, |
| 131 | .poll = sock_poll, |
| 132 | .unlocked_ioctl = sock_ioctl, |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 133 | #ifdef CONFIG_COMPAT |
| 134 | .compat_ioctl = compat_sock_ioctl, |
| 135 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | .mmap = sock_mmap, |
| 137 | .open = sock_no_open, /* special open code to disallow open via /proc */ |
| 138 | .release = sock_close, |
| 139 | .fasync = sock_fasync, |
Jens Axboe | 5274f05 | 2006-03-30 15:15:30 +0200 | [diff] [blame] | 140 | .sendpage = sock_sendpage, |
| 141 | .splice_write = generic_splice_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 142 | .splice_read = sock_splice_read, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | }; |
| 144 | |
| 145 | /* |
| 146 | * The protocol list. Each protocol is registered in here. |
| 147 | */ |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | static DEFINE_SPINLOCK(net_family_lock); |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 150 | static const struct net_proto_family *net_families[NPROTO] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | /* |
| 153 | * Statistics counters of the socket lists |
| 154 | */ |
| 155 | |
| 156 | static DEFINE_PER_CPU(int, sockets_in_use) = 0; |
| 157 | |
| 158 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 159 | * Support routines. |
| 160 | * Move socket addresses back and forth across the kernel/user |
| 161 | * divide and look after the messy bits. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | */ |
| 163 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 164 | #define MAX_SOCK_ADDR 128 /* 108 for Unix domain - |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | 16 for IP, 16 for IPX, |
| 166 | 24 for IPv6, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 167 | about 80 for AX.25 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | must be at least one bigger than |
| 169 | the AF_UNIX size (see net/unix/af_unix.c |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 170 | :unix_mkname()). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | /** |
| 174 | * move_addr_to_kernel - copy a socket address into kernel space |
| 175 | * @uaddr: Address in user space |
| 176 | * @kaddr: Address in kernel space |
| 177 | * @ulen: Length in user space |
| 178 | * |
| 179 | * The address is copied into kernel space. If the provided address is |
| 180 | * too long an error code of -EINVAL is returned. If the copy gives |
| 181 | * invalid addresses -EFAULT is returned. On a success 0 is returned. |
| 182 | */ |
| 183 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 184 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 186 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 188 | if (ulen == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | return 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 190 | if (copy_from_user(kaddr, uaddr, ulen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 192 | return audit_sockaddr(ulen, kaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | /** |
| 196 | * move_addr_to_user - copy an address to user space |
| 197 | * @kaddr: kernel space address |
| 198 | * @klen: length of address in kernel |
| 199 | * @uaddr: user space address |
| 200 | * @ulen: pointer to user length field |
| 201 | * |
| 202 | * The value pointed to by ulen on entry is the buffer length available. |
| 203 | * This is overwritten with the buffer space used. -EINVAL is returned |
| 204 | * if an overlong buffer is specified or a negative buffer size. -EFAULT |
| 205 | * is returned if either the buffer or the length field are not |
| 206 | * accessible. |
| 207 | * After copying the data up to the limit the user specifies, the true |
| 208 | * length of the data is written over the length limit the user |
| 209 | * specified. Zero is returned for a success. |
| 210 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 211 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 212 | int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 213 | int __user *ulen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | { |
| 215 | int err; |
| 216 | int len; |
| 217 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 218 | err = get_user(len, ulen); |
| 219 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | return err; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 221 | if (len > klen) |
| 222 | len = klen; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 223 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 225 | if (len) { |
Steve Grubb | d6fe394 | 2006-03-30 12:20:22 -0500 | [diff] [blame] | 226 | if (audit_sockaddr(klen, kaddr)) |
| 227 | return -ENOMEM; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 228 | if (copy_to_user(uaddr, kaddr, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | return -EFAULT; |
| 230 | } |
| 231 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 232 | * "fromlen shall refer to the value before truncation.." |
| 233 | * 1003.1g |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | */ |
| 235 | return __put_user(klen, ulen); |
| 236 | } |
| 237 | |
| 238 | #define SOCKFS_MAGIC 0x534F434B |
| 239 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 240 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
| 242 | static struct inode *sock_alloc_inode(struct super_block *sb) |
| 243 | { |
| 244 | struct socket_alloc *ei; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 245 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 246 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | if (!ei) |
| 248 | return NULL; |
| 249 | init_waitqueue_head(&ei->socket.wait); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | ei->socket.fasync_list = NULL; |
| 252 | ei->socket.state = SS_UNCONNECTED; |
| 253 | ei->socket.flags = 0; |
| 254 | ei->socket.ops = NULL; |
| 255 | ei->socket.sk = NULL; |
| 256 | ei->socket.file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | return &ei->vfs_inode; |
| 259 | } |
| 260 | |
| 261 | static void sock_destroy_inode(struct inode *inode) |
| 262 | { |
| 263 | kmem_cache_free(sock_inode_cachep, |
| 264 | container_of(inode, struct socket_alloc, vfs_inode)); |
| 265 | } |
| 266 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 267 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 269 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 271 | inode_init_once(&ei->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | static int init_inodecache(void) |
| 275 | { |
| 276 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 277 | sizeof(struct socket_alloc), |
| 278 | 0, |
| 279 | (SLAB_HWCACHE_ALIGN | |
| 280 | SLAB_RECLAIM_ACCOUNT | |
| 281 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 282 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | if (sock_inode_cachep == NULL) |
| 284 | return -ENOMEM; |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | static struct super_operations sockfs_ops = { |
| 289 | .alloc_inode = sock_alloc_inode, |
| 290 | .destroy_inode =sock_destroy_inode, |
| 291 | .statfs = simple_statfs, |
| 292 | }; |
| 293 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 294 | static int sockfs_get_sb(struct file_system_type *fs_type, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 295 | int flags, const char *dev_name, void *data, |
| 296 | struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 298 | return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC, |
| 299 | mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | } |
| 301 | |
Eric Dumazet | ba89966 | 2005-08-26 12:05:31 -0700 | [diff] [blame] | 302 | static struct vfsmount *sock_mnt __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | |
| 304 | static struct file_system_type sock_fs_type = { |
| 305 | .name = "sockfs", |
| 306 | .get_sb = sockfs_get_sb, |
| 307 | .kill_sb = kill_anon_super, |
| 308 | }; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | static int sockfs_delete_dentry(struct dentry *dentry) |
| 311 | { |
Eric Dumazet | 304e61e | 2006-12-06 20:38:49 -0800 | [diff] [blame] | 312 | /* |
| 313 | * At creation time, we pretended this dentry was hashed |
| 314 | * (by clearing DCACHE_UNHASHED bit in d_flags) |
| 315 | * At delete time, we restore the truth : not hashed. |
| 316 | * (so that dput() can proceed correctly) |
| 317 | */ |
| 318 | dentry->d_flags |= DCACHE_UNHASHED; |
| 319 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 321 | |
| 322 | /* |
| 323 | * sockfs_dname() is called from d_path(). |
| 324 | */ |
| 325 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) |
| 326 | { |
| 327 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", |
| 328 | dentry->d_inode->i_ino); |
| 329 | } |
| 330 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | static struct dentry_operations sockfs_dentry_operations = { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 332 | .d_delete = sockfs_delete_dentry, |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 333 | .d_dname = sockfs_dname, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | }; |
| 335 | |
| 336 | /* |
| 337 | * Obtains the first available file descriptor and sets it up for use. |
| 338 | * |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 339 | * These functions create file structures and maps them to fd space |
| 340 | * of the current process. On success it returns file descriptor |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | * and file struct implicitly stored in sock->file. |
| 342 | * Note that another thread may close file descriptor before we return |
| 343 | * from this function. We use the fact that now we do not refer |
| 344 | * to socket after mapping. If one day we will need it, this |
| 345 | * function will increment ref. count on file by 1. |
| 346 | * |
| 347 | * In any case returned fd MAY BE not valid! |
| 348 | * This race condition is unavoidable |
| 349 | * with shared fd spaces, we cannot solve it inside kernel, |
| 350 | * but we take care of internal coherence yet. |
| 351 | */ |
| 352 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 353 | static int sock_alloc_fd(struct file **filep, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | { |
| 355 | int fd; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 356 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 357 | fd = get_unused_fd_flags(flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 358 | if (likely(fd >= 0)) { |
| 359 | struct file *file = get_empty_filp(); |
| 360 | |
| 361 | *filep = file; |
| 362 | if (unlikely(!file)) { |
| 363 | put_unused_fd(fd); |
| 364 | return -ENFILE; |
| 365 | } |
| 366 | } else |
| 367 | *filep = NULL; |
| 368 | return fd; |
| 369 | } |
| 370 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 371 | static int sock_attach_fd(struct socket *sock, struct file *file, int flags) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 372 | { |
Dave Hansen | ce8d2cd | 2007-10-16 23:31:13 -0700 | [diff] [blame] | 373 | struct dentry *dentry; |
Eric Dumazet | c23fbb6 | 2007-05-08 00:26:18 -0700 | [diff] [blame] | 374 | struct qstr name = { .name = "" }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | |
Dave Hansen | ce8d2cd | 2007-10-16 23:31:13 -0700 | [diff] [blame] | 376 | dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); |
| 377 | if (unlikely(!dentry)) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 378 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | |
Dave Hansen | ce8d2cd | 2007-10-16 23:31:13 -0700 | [diff] [blame] | 380 | dentry->d_op = &sockfs_dentry_operations; |
Eric Dumazet | 304e61e | 2006-12-06 20:38:49 -0800 | [diff] [blame] | 381 | /* |
| 382 | * We dont want to push this dentry into global dentry hash table. |
| 383 | * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED |
| 384 | * This permits a working /proc/$pid/fd/XXX on sockets |
| 385 | */ |
Dave Hansen | ce8d2cd | 2007-10-16 23:31:13 -0700 | [diff] [blame] | 386 | dentry->d_flags &= ~DCACHE_UNHASHED; |
| 387 | d_instantiate(dentry, SOCK_INODE(sock)); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 388 | |
| 389 | sock->file = file; |
Dave Hansen | ce8d2cd | 2007-10-16 23:31:13 -0700 | [diff] [blame] | 390 | init_file(file, sock_mnt, dentry, FMODE_READ | FMODE_WRITE, |
| 391 | &socket_file_ops); |
| 392 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 393 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 394 | file->f_pos = 0; |
| 395 | file->private_data = sock; |
| 396 | |
| 397 | return 0; |
| 398 | } |
| 399 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 400 | int sock_map_fd(struct socket *sock, int flags) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 401 | { |
| 402 | struct file *newfile; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 403 | int fd = sock_alloc_fd(&newfile, flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 404 | |
| 405 | if (likely(fd >= 0)) { |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 406 | int err = sock_attach_fd(sock, newfile, flags); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 407 | |
| 408 | if (unlikely(err < 0)) { |
| 409 | put_filp(newfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | put_unused_fd(fd); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 411 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 413 | fd_install(fd, newfile); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | return fd; |
| 416 | } |
| 417 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 418 | static struct socket *sock_from_file(struct file *file, int *err) |
| 419 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 420 | if (file->f_op == &socket_file_ops) |
| 421 | return file->private_data; /* set in sock_map_fd */ |
| 422 | |
Eric Dumazet | 23bb80d | 2007-02-08 14:59:57 -0800 | [diff] [blame] | 423 | *err = -ENOTSOCK; |
| 424 | return NULL; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 425 | } |
| 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | /** |
| 428 | * sockfd_lookup - Go from a file number to its socket slot |
| 429 | * @fd: file handle |
| 430 | * @err: pointer to an error code return |
| 431 | * |
| 432 | * The file handle passed in is locked and the socket it is bound |
| 433 | * too is returned. If an error occurs the err pointer is overwritten |
| 434 | * with a negative errno code and NULL is returned. The function checks |
| 435 | * for both invalid handles and passing a handle which is not a socket. |
| 436 | * |
| 437 | * On a success the socket object pointer is returned. |
| 438 | */ |
| 439 | |
| 440 | struct socket *sockfd_lookup(int fd, int *err) |
| 441 | { |
| 442 | struct file *file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | struct socket *sock; |
| 444 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 445 | file = fget(fd); |
| 446 | if (!file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | *err = -EBADF; |
| 448 | return NULL; |
| 449 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 450 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 451 | sock = sock_from_file(file, err); |
| 452 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | fput(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | return sock; |
| 455 | } |
| 456 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 457 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
| 458 | { |
| 459 | struct file *file; |
| 460 | struct socket *sock; |
| 461 | |
Hua Zhong | 3672558 | 2006-04-19 15:25:02 -0700 | [diff] [blame] | 462 | *err = -EBADF; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 463 | file = fget_light(fd, fput_needed); |
| 464 | if (file) { |
| 465 | sock = sock_from_file(file, err); |
| 466 | if (sock) |
| 467 | return sock; |
| 468 | fput_light(file, *fput_needed); |
| 469 | } |
| 470 | return NULL; |
| 471 | } |
| 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | /** |
| 474 | * sock_alloc - allocate a socket |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 475 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | * Allocate a new inode and socket object. The two are bound together |
| 477 | * and initialised. The socket is then returned. If we are out of inodes |
| 478 | * NULL is returned. |
| 479 | */ |
| 480 | |
| 481 | static struct socket *sock_alloc(void) |
| 482 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 483 | struct inode *inode; |
| 484 | struct socket *sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | |
| 486 | inode = new_inode(sock_mnt->mnt_sb); |
| 487 | if (!inode) |
| 488 | return NULL; |
| 489 | |
| 490 | sock = SOCKET_I(inode); |
| 491 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 492 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | inode->i_uid = current->fsuid; |
| 494 | inode->i_gid = current->fsgid; |
| 495 | |
| 496 | get_cpu_var(sockets_in_use)++; |
| 497 | put_cpu_var(sockets_in_use); |
| 498 | return sock; |
| 499 | } |
| 500 | |
| 501 | /* |
| 502 | * In theory you can't get an open on this inode, but /proc provides |
| 503 | * a back door. Remember to keep it shut otherwise you'll let the |
| 504 | * creepy crawlies in. |
| 505 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
| 508 | { |
| 509 | return -ENXIO; |
| 510 | } |
| 511 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 512 | const struct file_operations bad_sock_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | .owner = THIS_MODULE, |
| 514 | .open = sock_no_open, |
| 515 | }; |
| 516 | |
| 517 | /** |
| 518 | * sock_release - close a socket |
| 519 | * @sock: socket to close |
| 520 | * |
| 521 | * The socket is released from the protocol stack if it has a release |
| 522 | * 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] | 523 | * an inode not a file. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | void sock_release(struct socket *sock) |
| 527 | { |
| 528 | if (sock->ops) { |
| 529 | struct module *owner = sock->ops->owner; |
| 530 | |
| 531 | sock->ops->release(sock); |
| 532 | sock->ops = NULL; |
| 533 | module_put(owner); |
| 534 | } |
| 535 | |
| 536 | if (sock->fasync_list) |
| 537 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
| 538 | |
| 539 | get_cpu_var(sockets_in_use)--; |
| 540 | put_cpu_var(sockets_in_use); |
| 541 | if (!sock->file) { |
| 542 | iput(SOCK_INODE(sock)); |
| 543 | return; |
| 544 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 545 | sock->file = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | } |
| 547 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 548 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | struct msghdr *msg, size_t size) |
| 550 | { |
| 551 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
| 552 | int err; |
| 553 | |
| 554 | si->sock = sock; |
| 555 | si->scm = NULL; |
| 556 | si->msg = msg; |
| 557 | si->size = size; |
| 558 | |
| 559 | err = security_socket_sendmsg(sock, msg, size); |
| 560 | if (err) |
| 561 | return err; |
| 562 | |
| 563 | return sock->ops->sendmsg(iocb, sock, msg, size); |
| 564 | } |
| 565 | |
| 566 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
| 567 | { |
| 568 | struct kiocb iocb; |
| 569 | struct sock_iocb siocb; |
| 570 | int ret; |
| 571 | |
| 572 | init_sync_kiocb(&iocb, NULL); |
| 573 | iocb.private = &siocb; |
| 574 | ret = __sock_sendmsg(&iocb, sock, msg, size); |
| 575 | if (-EIOCBQUEUED == ret) |
| 576 | ret = wait_on_sync_kiocb(&iocb); |
| 577 | return ret; |
| 578 | } |
| 579 | |
| 580 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 581 | struct kvec *vec, size_t num, size_t size) |
| 582 | { |
| 583 | mm_segment_t oldfs = get_fs(); |
| 584 | int result; |
| 585 | |
| 586 | set_fs(KERNEL_DS); |
| 587 | /* |
| 588 | * the following is safe, since for compiler definitions of kvec and |
| 589 | * iovec are identical, yielding the same in-core layout and alignment |
| 590 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 591 | msg->msg_iov = (struct iovec *)vec; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | msg->msg_iovlen = num; |
| 593 | result = sock_sendmsg(sock, msg, size); |
| 594 | set_fs(oldfs); |
| 595 | return result; |
| 596 | } |
| 597 | |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 598 | /* |
| 599 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) |
| 600 | */ |
| 601 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, |
| 602 | struct sk_buff *skb) |
| 603 | { |
| 604 | ktime_t kt = skb->tstamp; |
| 605 | |
| 606 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { |
| 607 | struct timeval tv; |
| 608 | /* Race occurred between timestamp enabling and packet |
| 609 | receiving. Fill in the current time for now. */ |
| 610 | if (kt.tv64 == 0) |
| 611 | kt = ktime_get_real(); |
| 612 | skb->tstamp = kt; |
| 613 | tv = ktime_to_timeval(kt); |
| 614 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, sizeof(tv), &tv); |
| 615 | } else { |
| 616 | struct timespec ts; |
| 617 | /* Race occurred between timestamp enabling and packet |
| 618 | receiving. Fill in the current time for now. */ |
| 619 | if (kt.tv64 == 0) |
| 620 | kt = ktime_get_real(); |
| 621 | skb->tstamp = kt; |
| 622 | ts = ktime_to_timespec(kt); |
| 623 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, sizeof(ts), &ts); |
| 624 | } |
| 625 | } |
| 626 | |
Arnaldo Carvalho de Melo | 7c81fd8 | 2007-03-10 00:39:35 -0300 | [diff] [blame] | 627 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
| 628 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 629 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | struct msghdr *msg, size_t size, int flags) |
| 631 | { |
| 632 | int err; |
| 633 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
| 634 | |
| 635 | si->sock = sock; |
| 636 | si->scm = NULL; |
| 637 | si->msg = msg; |
| 638 | si->size = size; |
| 639 | si->flags = flags; |
| 640 | |
| 641 | err = security_socket_recvmsg(sock, msg, size, flags); |
| 642 | if (err) |
| 643 | return err; |
| 644 | |
| 645 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
| 646 | } |
| 647 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 648 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | size_t size, int flags) |
| 650 | { |
| 651 | struct kiocb iocb; |
| 652 | struct sock_iocb siocb; |
| 653 | int ret; |
| 654 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 655 | init_sync_kiocb(&iocb, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 656 | iocb.private = &siocb; |
| 657 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); |
| 658 | if (-EIOCBQUEUED == ret) |
| 659 | ret = wait_on_sync_kiocb(&iocb); |
| 660 | return ret; |
| 661 | } |
| 662 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 663 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 664 | struct kvec *vec, size_t num, size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | { |
| 666 | mm_segment_t oldfs = get_fs(); |
| 667 | int result; |
| 668 | |
| 669 | set_fs(KERNEL_DS); |
| 670 | /* |
| 671 | * the following is safe, since for compiler definitions of kvec and |
| 672 | * iovec are identical, yielding the same in-core layout and alignment |
| 673 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 674 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | result = sock_recvmsg(sock, msg, size, flags); |
| 676 | set_fs(oldfs); |
| 677 | return result; |
| 678 | } |
| 679 | |
| 680 | static void sock_aio_dtor(struct kiocb *iocb) |
| 681 | { |
| 682 | kfree(iocb->private); |
| 683 | } |
| 684 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 685 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
| 686 | int offset, size_t size, loff_t *ppos, int more) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | { |
| 688 | struct socket *sock; |
| 689 | int flags; |
| 690 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 691 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
| 693 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; |
| 694 | if (more) |
| 695 | flags |= MSG_MORE; |
| 696 | |
| 697 | return sock->ops->sendpage(sock, page, offset, size, flags); |
| 698 | } |
| 699 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 700 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
| 701 | struct pipe_inode_info *pipe, size_t len, |
| 702 | unsigned int flags) |
| 703 | { |
| 704 | struct socket *sock = file->private_data; |
| 705 | |
Rémi Denis-Courmont | 997b37d | 2008-02-15 02:35:45 -0800 | [diff] [blame] | 706 | if (unlikely(!sock->ops->splice_read)) |
| 707 | return -EINVAL; |
| 708 | |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 709 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
| 710 | } |
| 711 | |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 712 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 713 | struct sock_iocb *siocb) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 714 | { |
| 715 | if (!is_sync_kiocb(iocb)) { |
| 716 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); |
| 717 | if (!siocb) |
| 718 | return NULL; |
| 719 | iocb->ki_dtor = sock_aio_dtor; |
| 720 | } |
| 721 | |
| 722 | siocb->kiocb = iocb; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 723 | iocb->private = siocb; |
| 724 | return siocb; |
| 725 | } |
| 726 | |
| 727 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 728 | struct file *file, const struct iovec *iov, |
| 729 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 730 | { |
| 731 | struct socket *sock = file->private_data; |
| 732 | size_t size = 0; |
| 733 | int i; |
| 734 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 735 | for (i = 0; i < nr_segs; i++) |
| 736 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 737 | |
| 738 | msg->msg_name = NULL; |
| 739 | msg->msg_namelen = 0; |
| 740 | msg->msg_control = NULL; |
| 741 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 742 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 743 | msg->msg_iovlen = nr_segs; |
| 744 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 745 | |
| 746 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); |
| 747 | } |
| 748 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 749 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
| 750 | unsigned long nr_segs, loff_t pos) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 751 | { |
| 752 | struct sock_iocb siocb, *x; |
| 753 | |
| 754 | if (pos != 0) |
| 755 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 756 | |
| 757 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 758 | return 0; |
| 759 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 760 | |
| 761 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 762 | if (!x) |
| 763 | return -ENOMEM; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 764 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 765 | } |
| 766 | |
| 767 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 768 | struct file *file, const struct iovec *iov, |
| 769 | unsigned long nr_segs) |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 770 | { |
| 771 | struct socket *sock = file->private_data; |
| 772 | size_t size = 0; |
| 773 | int i; |
| 774 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 775 | for (i = 0; i < nr_segs; i++) |
| 776 | size += iov[i].iov_len; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 777 | |
| 778 | msg->msg_name = NULL; |
| 779 | msg->msg_namelen = 0; |
| 780 | msg->msg_control = NULL; |
| 781 | msg->msg_controllen = 0; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 782 | msg->msg_iov = (struct iovec *)iov; |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 783 | msg->msg_iovlen = nr_segs; |
| 784 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; |
| 785 | if (sock->type == SOCK_SEQPACKET) |
| 786 | msg->msg_flags |= MSG_EOR; |
| 787 | |
| 788 | return __sock_sendmsg(iocb, sock, msg, size); |
| 789 | } |
| 790 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 791 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
| 792 | unsigned long nr_segs, loff_t pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | { |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 794 | struct sock_iocb siocb, *x; |
| 795 | |
| 796 | if (pos != 0) |
| 797 | return -ESPIPE; |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 798 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 799 | x = alloc_sock_iocb(iocb, &siocb); |
Christoph Hellwig | ce1d4d3 | 2005-12-22 21:08:46 -0800 | [diff] [blame] | 800 | if (!x) |
| 801 | return -ENOMEM; |
| 802 | |
Badari Pulavarty | 027445c | 2006-09-30 23:28:46 -0700 | [diff] [blame] | 803 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | } |
| 805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | /* |
| 807 | * Atomic setting of ioctl hooks to avoid race |
| 808 | * with module unload. |
| 809 | */ |
| 810 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 811 | static DEFINE_MUTEX(br_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 812 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 814 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 816 | mutex_lock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | br_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 818 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 820 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | EXPORT_SYMBOL(brioctl_set); |
| 822 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 823 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 824 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 826 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 828 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | vlan_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 830 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 832 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | EXPORT_SYMBOL(vlan_ioctl_set); |
| 834 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 835 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 836 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 838 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | { |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 840 | mutex_lock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | dlci_ioctl_hook = hook; |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 842 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 844 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | EXPORT_SYMBOL(dlci_ioctl_set); |
| 846 | |
| 847 | /* |
| 848 | * With an ioctl, arg may well be a user mode pointer, but we don't know |
| 849 | * what to do with it - that's up to the protocol still. |
| 850 | */ |
| 851 | |
| 852 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) |
| 853 | { |
| 854 | struct socket *sock; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 855 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 856 | void __user *argp = (void __user *)arg; |
| 857 | int pid, err; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 858 | struct net *net; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 860 | sock = file->private_data; |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 861 | sk = sock->sk; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 862 | net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 864 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 865 | } else |
Adrian Bunk | d86b5e0 | 2006-01-21 00:46:55 +0100 | [diff] [blame] | 866 | #ifdef CONFIG_WIRELESS_EXT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 868 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | } else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 870 | #endif /* CONFIG_WIRELESS_EXT */ |
| 871 | switch (cmd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 872 | case FIOSETOWN: |
| 873 | case SIOCSPGRP: |
| 874 | err = -EFAULT; |
| 875 | if (get_user(pid, (int __user *)argp)) |
| 876 | break; |
| 877 | err = f_setown(sock->file, pid, 1); |
| 878 | break; |
| 879 | case FIOGETOWN: |
| 880 | case SIOCGPGRP: |
Eric W. Biederman | 609d7fa | 2006-10-02 02:17:15 -0700 | [diff] [blame] | 881 | err = put_user(f_getown(sock->file), |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 882 | (int __user *)argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | break; |
| 884 | case SIOCGIFBR: |
| 885 | case SIOCSIFBR: |
| 886 | case SIOCBRADDBR: |
| 887 | case SIOCBRDELBR: |
| 888 | err = -ENOPKG; |
| 889 | if (!br_ioctl_hook) |
| 890 | request_module("bridge"); |
| 891 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 892 | mutex_lock(&br_ioctl_mutex); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 893 | if (br_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 894 | err = br_ioctl_hook(net, cmd, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 895 | mutex_unlock(&br_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | break; |
| 897 | case SIOCGIFVLAN: |
| 898 | case SIOCSIFVLAN: |
| 899 | err = -ENOPKG; |
| 900 | if (!vlan_ioctl_hook) |
| 901 | request_module("8021q"); |
| 902 | |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 903 | mutex_lock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 904 | if (vlan_ioctl_hook) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 905 | err = vlan_ioctl_hook(net, argp); |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 906 | mutex_unlock(&vlan_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | case SIOCADDDLCI: |
| 909 | case SIOCDELDLCI: |
| 910 | err = -ENOPKG; |
| 911 | if (!dlci_ioctl_hook) |
| 912 | request_module("dlci"); |
| 913 | |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 914 | mutex_lock(&dlci_ioctl_mutex); |
| 915 | if (dlci_ioctl_hook) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | err = dlci_ioctl_hook(cmd, argp); |
Pavel Emelyanov | 7512cbf | 2008-03-21 15:58:52 -0700 | [diff] [blame] | 917 | mutex_unlock(&dlci_ioctl_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 918 | break; |
| 919 | default: |
| 920 | err = sock->ops->ioctl(sock, cmd, arg); |
Christoph Hellwig | b5e5fa5 | 2006-01-03 14:18:33 -0800 | [diff] [blame] | 921 | |
| 922 | /* |
| 923 | * If this ioctl is unknown try to hand it down |
| 924 | * to the NIC driver. |
| 925 | */ |
| 926 | if (err == -ENOIOCTLCMD) |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 927 | err = dev_ioctl(net, cmd, argp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 929 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | return err; |
| 931 | } |
| 932 | |
| 933 | int sock_create_lite(int family, int type, int protocol, struct socket **res) |
| 934 | { |
| 935 | int err; |
| 936 | struct socket *sock = NULL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 937 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 938 | err = security_socket_create(family, type, protocol, 1); |
| 939 | if (err) |
| 940 | goto out; |
| 941 | |
| 942 | sock = sock_alloc(); |
| 943 | if (!sock) { |
| 944 | err = -ENOMEM; |
| 945 | goto out; |
| 946 | } |
| 947 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 948 | sock->type = type; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 949 | err = security_socket_post_create(sock, family, type, protocol, 1); |
| 950 | if (err) |
| 951 | goto out_release; |
| 952 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 953 | out: |
| 954 | *res = sock; |
| 955 | return err; |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 956 | out_release: |
| 957 | sock_release(sock); |
| 958 | sock = NULL; |
| 959 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | } |
| 961 | |
| 962 | /* No kernel lock held - perfect */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 963 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | { |
| 965 | struct socket *sock; |
| 966 | |
| 967 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 968 | * 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] | 969 | */ |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 970 | sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | return sock->ops->poll(file, sock, wait); |
| 972 | } |
| 973 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 974 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | { |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 976 | struct socket *sock = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | |
| 978 | return sock->ops->mmap(file, sock, vma); |
| 979 | } |
| 980 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 981 | static int sock_close(struct inode *inode, struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | { |
| 983 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 984 | * It was possible the inode is NULL we were |
| 985 | * closing an unfinished socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | */ |
| 987 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 988 | if (!inode) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
| 990 | return 0; |
| 991 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | sock_release(SOCKET_I(inode)); |
| 993 | return 0; |
| 994 | } |
| 995 | |
| 996 | /* |
| 997 | * Update the socket async list |
| 998 | * |
| 999 | * Fasync_list locking strategy. |
| 1000 | * |
| 1001 | * 1. fasync_list is modified only under process context socket lock |
| 1002 | * i.e. under semaphore. |
| 1003 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) |
| 1004 | * or under socket lock. |
| 1005 | * 3. fasync_list can be used from softirq context, so that |
| 1006 | * modification under socket lock have to be enhanced with |
| 1007 | * write_lock_bh(&sk->sk_callback_lock). |
| 1008 | * --ANK (990710) |
| 1009 | */ |
| 1010 | |
| 1011 | static int sock_fasync(int fd, struct file *filp, int on) |
| 1012 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1013 | struct fasync_struct *fa, *fna = NULL, **prev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | struct socket *sock; |
| 1015 | struct sock *sk; |
| 1016 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1017 | if (on) { |
Kris Katterjohn | 8b3a700 | 2006-01-11 15:56:43 -0800 | [diff] [blame] | 1018 | fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1019 | if (fna == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | return -ENOMEM; |
| 1021 | } |
| 1022 | |
Eric Dumazet | b69aee0 | 2005-09-06 14:42:45 -0700 | [diff] [blame] | 1023 | sock = filp->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1025 | sk = sock->sk; |
| 1026 | if (sk == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | kfree(fna); |
| 1028 | return -EINVAL; |
| 1029 | } |
| 1030 | |
| 1031 | lock_sock(sk); |
| 1032 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1033 | prev = &(sock->fasync_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1035 | for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev) |
| 1036 | if (fa->fa_file == filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | break; |
| 1038 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1039 | if (on) { |
| 1040 | if (fa != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | write_lock_bh(&sk->sk_callback_lock); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1042 | fa->fa_fd = fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | write_unlock_bh(&sk->sk_callback_lock); |
| 1044 | |
| 1045 | kfree(fna); |
| 1046 | goto out; |
| 1047 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1048 | fna->fa_file = filp; |
| 1049 | fna->fa_fd = fd; |
| 1050 | fna->magic = FASYNC_MAGIC; |
| 1051 | fna->fa_next = sock->fasync_list; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | write_lock_bh(&sk->sk_callback_lock); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1053 | sock->fasync_list = fna; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | write_unlock_bh(&sk->sk_callback_lock); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1055 | } else { |
| 1056 | if (fa != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | write_lock_bh(&sk->sk_callback_lock); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1058 | *prev = fa->fa_next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | write_unlock_bh(&sk->sk_callback_lock); |
| 1060 | kfree(fa); |
| 1061 | } |
| 1062 | } |
| 1063 | |
| 1064 | out: |
| 1065 | release_sock(sock->sk); |
| 1066 | return 0; |
| 1067 | } |
| 1068 | |
| 1069 | /* This function may be called only under socket lock or callback_lock */ |
| 1070 | |
| 1071 | int sock_wake_async(struct socket *sock, int how, int band) |
| 1072 | { |
| 1073 | if (!sock || !sock->fasync_list) |
| 1074 | return -1; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1075 | switch (how) { |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1076 | case SOCK_WAKE_WAITD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
| 1078 | break; |
| 1079 | goto call_kill; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1080 | case SOCK_WAKE_SPACE: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
| 1082 | break; |
| 1083 | /* fall through */ |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1084 | case SOCK_WAKE_IO: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1085 | call_kill: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | __kill_fasync(sock->fasync_list, SIGIO, band); |
| 1087 | break; |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1088 | case SOCK_WAKE_URG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | __kill_fasync(sock->fasync_list, SIGURG, band); |
| 1090 | } |
| 1091 | return 0; |
| 1092 | } |
| 1093 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1094 | static int __sock_create(struct net *net, int family, int type, int protocol, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1095 | struct socket **res, int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | { |
| 1097 | int err; |
| 1098 | struct socket *sock; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1099 | const struct net_proto_family *pf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
| 1101 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1102 | * Check protocol is in range |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | */ |
| 1104 | if (family < 0 || family >= NPROTO) |
| 1105 | return -EAFNOSUPPORT; |
| 1106 | if (type < 0 || type >= SOCK_MAX) |
| 1107 | return -EINVAL; |
| 1108 | |
| 1109 | /* Compatibility. |
| 1110 | |
| 1111 | This uglymoron is moved from INET layer to here to avoid |
| 1112 | deadlock in module load. |
| 1113 | */ |
| 1114 | if (family == PF_INET && type == SOCK_PACKET) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1115 | static int warned; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | if (!warned) { |
| 1117 | warned = 1; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1118 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
| 1119 | current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | } |
| 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) { |
| 1135 | if (net_ratelimit()) |
| 1136 | printk(KERN_WARNING "socket: no more sockets\n"); |
| 1137 | return -ENFILE; /* Not exactly a match, but its the |
| 1138 | closest posix thing */ |
| 1139 | } |
| 1140 | |
| 1141 | sock->type = type; |
| 1142 | |
Johannes Berg | 95a5afc | 2008-10-16 15:24:51 -0700 | [diff] [blame] | 1143 | #ifdef CONFIG_MODULES |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1144 | /* Attempt to load a protocol module if the find failed. |
| 1145 | * |
| 1146 | * 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] | 1147 | * requested real, full-featured networking support upon configuration. |
| 1148 | * Otherwise module support will break! |
| 1149 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1150 | if (net_families[family] == NULL) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1151 | request_module("net-pf-%d", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | #endif |
| 1153 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1154 | rcu_read_lock(); |
| 1155 | pf = rcu_dereference(net_families[family]); |
| 1156 | err = -EAFNOSUPPORT; |
| 1157 | if (!pf) |
| 1158 | goto out_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | |
| 1160 | /* |
| 1161 | * We will call the ->create function, that possibly is in a loadable |
| 1162 | * module, so we have to bump that loadable module refcnt first. |
| 1163 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1164 | if (!try_module_get(pf->owner)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | goto out_release; |
| 1166 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1167 | /* Now protected by module ref count */ |
| 1168 | rcu_read_unlock(); |
| 1169 | |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1170 | err = pf->create(net, sock, protocol); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1171 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | goto out_module_put; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | /* |
| 1175 | * Now to bump the refcnt of the [loadable] module that owns this |
| 1176 | * socket at sock_release time we decrement its refcnt. |
| 1177 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1178 | if (!try_module_get(sock->ops->owner)) |
| 1179 | goto out_module_busy; |
| 1180 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1181 | /* |
| 1182 | * Now that we're done with the ->create function, the [loadable] |
| 1183 | * module can have its refcnt decremented |
| 1184 | */ |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1185 | module_put(pf->owner); |
Venkat Yekkirala | 7420ed2 | 2006-08-04 23:17:57 -0700 | [diff] [blame] | 1186 | err = security_socket_post_create(sock, family, type, protocol, kern); |
| 1187 | if (err) |
Herbert Xu | 3b18552 | 2007-08-15 14:46:02 -0700 | [diff] [blame] | 1188 | goto out_sock_release; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1189 | *res = sock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1191 | return 0; |
| 1192 | |
| 1193 | out_module_busy: |
| 1194 | err = -EAFNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1195 | out_module_put: |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1196 | sock->ops = NULL; |
| 1197 | module_put(pf->owner); |
| 1198 | out_sock_release: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1199 | sock_release(sock); |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 1200 | return err; |
| 1201 | |
| 1202 | out_release: |
| 1203 | rcu_read_unlock(); |
| 1204 | goto out_sock_release; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | } |
| 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 | } |
| 1211 | |
| 1212 | int sock_create_kern(int family, int type, int protocol, struct socket **res) |
| 1213 | { |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 1214 | return __sock_create(&init_net, family, type, protocol, res, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | } |
| 1216 | |
| 1217 | asmlinkage long sys_socket(int family, int type, int protocol) |
| 1218 | { |
| 1219 | int retval; |
| 1220 | struct socket *sock; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1221 | int flags; |
| 1222 | |
Ulrich Drepper | e38b36f | 2008-07-23 21:29:42 -0700 | [diff] [blame] | 1223 | /* Check the SOCK_* constants for consistency. */ |
| 1224 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); |
| 1225 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); |
| 1226 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); |
| 1227 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); |
| 1228 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1229 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1230 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1231 | return -EINVAL; |
| 1232 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1234 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1235 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | retval = sock_create(family, type, protocol, &sock); |
| 1238 | if (retval < 0) |
| 1239 | goto out; |
| 1240 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1241 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | if (retval < 0) |
| 1243 | goto out_release; |
| 1244 | |
| 1245 | out: |
| 1246 | /* It may be already another descriptor 8) Not kernel problem. */ |
| 1247 | return retval; |
| 1248 | |
| 1249 | out_release: |
| 1250 | sock_release(sock); |
| 1251 | return retval; |
| 1252 | } |
| 1253 | |
| 1254 | /* |
| 1255 | * Create a pair of connected sockets. |
| 1256 | */ |
| 1257 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1258 | asmlinkage long sys_socketpair(int family, int type, int protocol, |
| 1259 | int __user *usockvec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | { |
| 1261 | struct socket *sock1, *sock2; |
| 1262 | int fd1, fd2, err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1263 | struct file *newfile1, *newfile2; |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1264 | int flags; |
| 1265 | |
| 1266 | flags = type & ~SOCK_TYPE_MASK; |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1267 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1268 | return -EINVAL; |
| 1269 | type &= SOCK_TYPE_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1271 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1272 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | /* |
| 1275 | * Obtain the first socket and check if the underlying protocol |
| 1276 | * supports the socketpair call. |
| 1277 | */ |
| 1278 | |
| 1279 | err = sock_create(family, type, protocol, &sock1); |
| 1280 | if (err < 0) |
| 1281 | goto out; |
| 1282 | |
| 1283 | err = sock_create(family, type, protocol, &sock2); |
| 1284 | if (err < 0) |
| 1285 | goto out_release_1; |
| 1286 | |
| 1287 | err = sock1->ops->socketpair(sock1, sock2); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1288 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1289 | goto out_release_both; |
| 1290 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1291 | fd1 = sock_alloc_fd(&newfile1, flags & O_CLOEXEC); |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1292 | if (unlikely(fd1 < 0)) { |
| 1293 | err = fd1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | goto out_release_both; |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1295 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 1297 | fd2 = sock_alloc_fd(&newfile2, flags & O_CLOEXEC); |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1298 | if (unlikely(fd2 < 0)) { |
David S. Miller | bf3c23d | 2007-10-29 21:54:02 -0700 | [diff] [blame] | 1299 | err = fd2; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1300 | put_filp(newfile1); |
| 1301 | put_unused_fd(fd1); |
| 1302 | goto out_release_both; |
| 1303 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1305 | err = sock_attach_fd(sock1, newfile1, flags & O_NONBLOCK); |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1306 | if (unlikely(err < 0)) { |
| 1307 | goto out_fd2; |
| 1308 | } |
| 1309 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1310 | err = sock_attach_fd(sock2, newfile2, flags & O_NONBLOCK); |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1311 | if (unlikely(err < 0)) { |
| 1312 | fput(newfile1); |
| 1313 | goto out_fd1; |
| 1314 | } |
| 1315 | |
| 1316 | err = audit_fd_pair(fd1, fd2); |
| 1317 | if (err < 0) { |
| 1318 | fput(newfile1); |
| 1319 | fput(newfile2); |
| 1320 | goto out_fd; |
| 1321 | } |
| 1322 | |
| 1323 | fd_install(fd1, newfile1); |
| 1324 | fd_install(fd2, newfile2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1325 | /* fd1 and fd2 may be already another descriptors. |
| 1326 | * Not kernel problem. |
| 1327 | */ |
| 1328 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1329 | err = put_user(fd1, &usockvec[0]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | if (!err) |
| 1331 | err = put_user(fd2, &usockvec[1]); |
| 1332 | if (!err) |
| 1333 | return 0; |
| 1334 | |
| 1335 | sys_close(fd2); |
| 1336 | sys_close(fd1); |
| 1337 | return err; |
| 1338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | out_release_both: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1340 | sock_release(sock2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1341 | out_release_1: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1342 | sock_release(sock1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | out: |
| 1344 | return err; |
Al Viro | db34950 | 2007-02-07 01:48:00 -0500 | [diff] [blame] | 1345 | |
| 1346 | out_fd2: |
| 1347 | put_filp(newfile1); |
| 1348 | sock_release(sock1); |
| 1349 | out_fd1: |
| 1350 | put_filp(newfile2); |
| 1351 | sock_release(sock2); |
| 1352 | out_fd: |
| 1353 | put_unused_fd(fd1); |
| 1354 | put_unused_fd(fd2); |
| 1355 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | } |
| 1357 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | /* |
| 1359 | * Bind a name to a socket. Nothing much to do here since it's |
| 1360 | * the protocol's responsibility to handle the local address. |
| 1361 | * |
| 1362 | * We move the socket address to kernel space before we call |
| 1363 | * the protocol layer (having also checked the address is ok). |
| 1364 | */ |
| 1365 | |
| 1366 | asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen) |
| 1367 | { |
| 1368 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1369 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1370 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1372 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1373 | if (sock) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1374 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1375 | if (err >= 0) { |
| 1376 | err = security_socket_bind(sock, |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1377 | (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1378 | addrlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1379 | if (!err) |
| 1380 | err = sock->ops->bind(sock, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1381 | (struct sockaddr *) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1382 | &address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | } |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1384 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1385 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1386 | return err; |
| 1387 | } |
| 1388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | /* |
| 1390 | * Perform a listen. Basically, we allow the protocol to do anything |
| 1391 | * necessary for a listen, and if that works, we mark the socket as |
| 1392 | * ready for listening. |
| 1393 | */ |
| 1394 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | asmlinkage long sys_listen(int fd, int backlog) |
| 1396 | { |
| 1397 | struct socket *sock; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1398 | int err, fput_needed; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1399 | int somaxconn; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1400 | |
| 1401 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1402 | if (sock) { |
Pavel Emelyanov | 8efa6e9 | 2008-03-31 19:41:14 -0700 | [diff] [blame] | 1403 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
Pavel Emelyanov | b8e1f9b | 2007-12-08 00:12:33 -0800 | [diff] [blame] | 1404 | if ((unsigned)backlog > somaxconn) |
| 1405 | backlog = somaxconn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | |
| 1407 | err = security_socket_listen(sock, backlog); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1408 | if (!err) |
| 1409 | err = sock->ops->listen(sock, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1411 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | } |
| 1413 | return err; |
| 1414 | } |
| 1415 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1416 | /* |
| 1417 | * For accept, we attempt to create a new socket, set up the link |
| 1418 | * with the client, wake up the client, then return the new |
| 1419 | * connected fd. We collect the address of the connector in kernel |
| 1420 | * space and move it to user at the very end. This is unclean because |
| 1421 | * we open the socket then return an error. |
| 1422 | * |
| 1423 | * 1003.1g adds the ability to recvmsg() to query connection pending |
| 1424 | * status to recvmsg. We need to add that support in a way thats |
| 1425 | * clean when we restucture accept also. |
| 1426 | */ |
| 1427 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1428 | long do_accept(int fd, struct sockaddr __user *upeer_sockaddr, |
| 1429 | int __user *upeer_addrlen, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | { |
| 1431 | struct socket *sock, *newsock; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1432 | struct file *newfile; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1433 | int err, len, newfd, fput_needed; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1434 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1436 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1437 | return -EINVAL; |
| 1438 | |
| 1439 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
| 1440 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; |
| 1441 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1442 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | if (!sock) |
| 1444 | goto out; |
| 1445 | |
| 1446 | err = -ENFILE; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1447 | if (!(newsock = sock_alloc())) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1448 | goto out_put; |
| 1449 | |
| 1450 | newsock->type = sock->type; |
| 1451 | newsock->ops = sock->ops; |
| 1452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | /* |
| 1454 | * We don't need try_module_get here, as the listening socket (sock) |
| 1455 | * has the protocol module (sock->ops->owner) held. |
| 1456 | */ |
| 1457 | __module_get(newsock->ops->owner); |
| 1458 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1459 | newfd = sock_alloc_fd(&newfile, flags & O_CLOEXEC); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1460 | if (unlikely(newfd < 0)) { |
| 1461 | err = newfd; |
David S. Miller | 9a1875e | 2006-04-01 12:48:36 -0800 | [diff] [blame] | 1462 | sock_release(newsock); |
| 1463 | goto out_put; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1464 | } |
| 1465 | |
Ulrich Drepper | 77d2720 | 2008-07-23 21:29:35 -0700 | [diff] [blame] | 1466 | err = sock_attach_fd(newsock, newfile, flags & O_NONBLOCK); |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1467 | if (err < 0) |
Alexey Dobriyan | 79f4f64 | 2007-03-26 14:09:52 -0700 | [diff] [blame] | 1468 | goto out_fd_simple; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1469 | |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1470 | err = security_socket_accept(sock, newsock); |
| 1471 | if (err) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1472 | goto out_fd; |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1473 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1474 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
| 1475 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1476 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1477 | |
| 1478 | if (upeer_sockaddr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1479 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1480 | &len, 2) < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | err = -ECONNABORTED; |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1482 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1483 | } |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1484 | err = move_addr_to_user((struct sockaddr *)&address, |
| 1485 | len, upeer_sockaddr, upeer_addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | if (err < 0) |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1487 | goto out_fd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | } |
| 1489 | |
| 1490 | /* File flags are not inherited via accept() unlike another OSes. */ |
| 1491 | |
David S. Miller | 39d8c1b | 2006-03-20 17:13:49 -0800 | [diff] [blame] | 1492 | fd_install(newfd, newfile); |
| 1493 | err = newfd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | |
| 1495 | security_socket_post_accept(sock, newsock); |
| 1496 | |
| 1497 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1498 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | out: |
| 1500 | return err; |
Alexey Dobriyan | 79f4f64 | 2007-03-26 14:09:52 -0700 | [diff] [blame] | 1501 | out_fd_simple: |
| 1502 | sock_release(newsock); |
| 1503 | put_filp(newfile); |
| 1504 | put_unused_fd(newfd); |
| 1505 | goto out_put; |
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 | |
Michael Kerrisk | 2d4c826 | 2008-09-22 13:57:49 -0700 | [diff] [blame] | 1512 | #if 0 |
Ulrich Drepper | c019bbc | 2008-07-23 21:29:21 -0700 | [diff] [blame] | 1513 | #ifdef HAVE_SET_RESTORE_SIGMASK |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1514 | asmlinkage long sys_paccept(int fd, struct sockaddr __user *upeer_sockaddr, |
| 1515 | int __user *upeer_addrlen, |
| 1516 | const sigset_t __user *sigmask, |
| 1517 | size_t sigsetsize, int flags) |
| 1518 | { |
| 1519 | sigset_t ksigmask, sigsaved; |
| 1520 | int ret; |
| 1521 | |
| 1522 | if (sigmask) { |
| 1523 | /* XXX: Don't preclude handling different sized sigset_t's. */ |
| 1524 | if (sigsetsize != sizeof(sigset_t)) |
| 1525 | return -EINVAL; |
| 1526 | if (copy_from_user(&ksigmask, sigmask, sizeof(ksigmask))) |
| 1527 | return -EFAULT; |
| 1528 | |
| 1529 | sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1530 | sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); |
| 1531 | } |
| 1532 | |
| 1533 | ret = do_accept(fd, upeer_sockaddr, upeer_addrlen, flags); |
| 1534 | |
| 1535 | if (ret < 0 && signal_pending(current)) { |
| 1536 | /* |
| 1537 | * Don't restore the signal mask yet. Let do_signal() deliver |
| 1538 | * the signal on the way back to userspace, before the signal |
| 1539 | * mask is restored. |
| 1540 | */ |
| 1541 | if (sigmask) { |
| 1542 | memcpy(¤t->saved_sigmask, &sigsaved, |
| 1543 | sizeof(sigsaved)); |
| 1544 | set_restore_sigmask(); |
| 1545 | } |
| 1546 | } else if (sigmask) |
| 1547 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 1548 | |
| 1549 | return ret; |
| 1550 | } |
Ulrich Drepper | c019bbc | 2008-07-23 21:29:21 -0700 | [diff] [blame] | 1551 | #else |
| 1552 | asmlinkage long sys_paccept(int fd, struct sockaddr __user *upeer_sockaddr, |
| 1553 | int __user *upeer_addrlen, |
| 1554 | const sigset_t __user *sigmask, |
| 1555 | size_t sigsetsize, int flags) |
| 1556 | { |
| 1557 | /* The platform does not support restoring the signal mask in the |
| 1558 | * return path. So we do not allow using paccept() with a signal |
| 1559 | * mask. */ |
| 1560 | if (sigmask) |
| 1561 | return -EINVAL; |
| 1562 | |
| 1563 | return do_accept(fd, upeer_sockaddr, upeer_addrlen, flags); |
| 1564 | } |
| 1565 | #endif |
Michael Kerrisk | 2d4c826 | 2008-09-22 13:57:49 -0700 | [diff] [blame] | 1566 | #endif |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 1567 | |
| 1568 | asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, |
| 1569 | int __user *upeer_addrlen) |
| 1570 | { |
| 1571 | return do_accept(fd, upeer_sockaddr, upeer_addrlen, 0); |
| 1572 | } |
| 1573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | /* |
| 1575 | * Attempt to connect to a socket with the server address. The address |
| 1576 | * is in user space so we verify it is OK and move it to kernel space. |
| 1577 | * |
| 1578 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to |
| 1579 | * break bindings |
| 1580 | * |
| 1581 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and |
| 1582 | * other SEQPACKET protocols that take time to connect() as it doesn't |
| 1583 | * include the -EINPROGRESS status for such sockets. |
| 1584 | */ |
| 1585 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1586 | asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr, |
| 1587 | int addrlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | { |
| 1589 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1590 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1591 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1593 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1594 | if (!sock) |
| 1595 | goto out; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1596 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1597 | if (err < 0) |
| 1598 | goto out_put; |
| 1599 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1600 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1601 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1602 | if (err) |
| 1603 | goto out_put; |
| 1604 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1605 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1606 | sock->file->f_flags); |
| 1607 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1608 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1609 | out: |
| 1610 | return err; |
| 1611 | } |
| 1612 | |
| 1613 | /* |
| 1614 | * Get the local address ('name') of a socket object. Move the obtained |
| 1615 | * name to user space. |
| 1616 | */ |
| 1617 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1618 | asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr, |
| 1619 | int __user *usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | { |
| 1621 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1622 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1623 | int len, err, fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1624 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1625 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | if (!sock) |
| 1627 | goto out; |
| 1628 | |
| 1629 | err = security_socket_getsockname(sock); |
| 1630 | if (err) |
| 1631 | goto out_put; |
| 1632 | |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1633 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1634 | if (err) |
| 1635 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1636 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1637 | |
| 1638 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1639 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | out: |
| 1641 | return err; |
| 1642 | } |
| 1643 | |
| 1644 | /* |
| 1645 | * Get the remote address ('name') of a socket object. Move the obtained |
| 1646 | * name to user space. |
| 1647 | */ |
| 1648 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1649 | asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr, |
| 1650 | int __user *usockaddr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1651 | { |
| 1652 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1653 | struct sockaddr_storage address; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1654 | int len, err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1656 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1657 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | err = security_socket_getpeername(sock); |
| 1659 | if (err) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1660 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | return err; |
| 1662 | } |
| 1663 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1664 | err = |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1665 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1666 | 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | if (!err) |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1668 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1669 | usockaddr_len); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1670 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | } |
| 1672 | return err; |
| 1673 | } |
| 1674 | |
| 1675 | /* |
| 1676 | * Send a datagram to a given address. We move the address into kernel |
| 1677 | * space and check the user space data area is readable before invoking |
| 1678 | * the protocol. |
| 1679 | */ |
| 1680 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1681 | asmlinkage long sys_sendto(int fd, void __user *buff, size_t len, |
| 1682 | unsigned flags, struct sockaddr __user *addr, |
| 1683 | int addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | { |
| 1685 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1686 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1687 | int err; |
| 1688 | struct msghdr msg; |
| 1689 | struct iovec iov; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1690 | int fput_needed; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1691 | |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1692 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1693 | if (!sock) |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1694 | goto out; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1695 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1696 | iov.iov_base = buff; |
| 1697 | iov.iov_len = len; |
| 1698 | msg.msg_name = NULL; |
| 1699 | msg.msg_iov = &iov; |
| 1700 | msg.msg_iovlen = 1; |
| 1701 | msg.msg_control = NULL; |
| 1702 | msg.msg_controllen = 0; |
| 1703 | msg.msg_namelen = 0; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1704 | if (addr) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1705 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | if (err < 0) |
| 1707 | goto out_put; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1708 | msg.msg_name = (struct sockaddr *)&address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1709 | msg.msg_namelen = addr_len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | } |
| 1711 | if (sock->file->f_flags & O_NONBLOCK) |
| 1712 | flags |= MSG_DONTWAIT; |
| 1713 | msg.msg_flags = flags; |
| 1714 | err = sock_sendmsg(sock, &msg, len); |
| 1715 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1716 | out_put: |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1717 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1718 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1719 | return err; |
| 1720 | } |
| 1721 | |
| 1722 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1723 | * Send a datagram down a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | */ |
| 1725 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1726 | asmlinkage long sys_send(int fd, void __user *buff, size_t len, unsigned flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | { |
| 1728 | return sys_sendto(fd, buff, len, flags, NULL, 0); |
| 1729 | } |
| 1730 | |
| 1731 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1732 | * 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] | 1733 | * sender. We verify the buffers are writable and if needed move the |
| 1734 | * sender address from kernel to user space. |
| 1735 | */ |
| 1736 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1737 | asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size, |
| 1738 | unsigned flags, struct sockaddr __user *addr, |
| 1739 | int __user *addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | { |
| 1741 | struct socket *sock; |
| 1742 | struct iovec iov; |
| 1743 | struct msghdr msg; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1744 | struct sockaddr_storage address; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1745 | int err, err2; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1746 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1747 | |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1748 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1749 | if (!sock) |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1750 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1752 | msg.msg_control = NULL; |
| 1753 | msg.msg_controllen = 0; |
| 1754 | msg.msg_iovlen = 1; |
| 1755 | msg.msg_iov = &iov; |
| 1756 | iov.iov_len = size; |
| 1757 | iov.iov_base = ubuf; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1758 | msg.msg_name = (struct sockaddr *)&address; |
| 1759 | msg.msg_namelen = sizeof(address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | if (sock->file->f_flags & O_NONBLOCK) |
| 1761 | flags |= MSG_DONTWAIT; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1762 | err = sock_recvmsg(sock, &msg, size, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1764 | if (err >= 0 && addr != NULL) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1765 | err2 = move_addr_to_user((struct sockaddr *)&address, |
| 1766 | msg.msg_namelen, addr, addr_len); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1767 | if (err2 < 0) |
| 1768 | err = err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | } |
Pavel Emelyanov | de0fa95 | 2007-11-14 16:01:43 -0800 | [diff] [blame] | 1770 | |
| 1771 | fput_light(sock->file, fput_needed); |
David S. Miller | 4387ff7 | 2007-02-08 15:06:08 -0800 | [diff] [blame] | 1772 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1773 | return err; |
| 1774 | } |
| 1775 | |
| 1776 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1777 | * Receive a datagram from a socket. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | */ |
| 1779 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1780 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
| 1781 | unsigned flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | { |
| 1783 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); |
| 1784 | } |
| 1785 | |
| 1786 | /* |
| 1787 | * Set a socket option. Because we don't know the option lengths we have |
| 1788 | * to pass the user mode parameter for the protocols to sort out. |
| 1789 | */ |
| 1790 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1791 | asmlinkage long sys_setsockopt(int fd, int level, int optname, |
| 1792 | char __user *optval, int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1794 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1795 | struct socket *sock; |
| 1796 | |
| 1797 | if (optlen < 0) |
| 1798 | return -EINVAL; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1799 | |
| 1800 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1801 | if (sock != NULL) { |
| 1802 | err = security_socket_setsockopt(sock, level, optname); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1803 | if (err) |
| 1804 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | |
| 1806 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1807 | err = |
| 1808 | sock_setsockopt(sock, level, optname, optval, |
| 1809 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1810 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1811 | err = |
| 1812 | sock->ops->setsockopt(sock, level, optname, optval, |
| 1813 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1814 | out_put: |
| 1815 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | } |
| 1817 | return err; |
| 1818 | } |
| 1819 | |
| 1820 | /* |
| 1821 | * Get a socket option. Because we don't know the option lengths we have |
| 1822 | * to pass a user mode parameter for the protocols to sort out. |
| 1823 | */ |
| 1824 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1825 | asmlinkage long sys_getsockopt(int fd, int level, int optname, |
| 1826 | char __user *optval, int __user *optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1828 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1829 | struct socket *sock; |
| 1830 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1831 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1832 | if (sock != NULL) { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1833 | err = security_socket_getsockopt(sock, level, optname); |
| 1834 | if (err) |
| 1835 | goto out_put; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | |
| 1837 | if (level == SOL_SOCKET) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1838 | err = |
| 1839 | sock_getsockopt(sock, level, optname, optval, |
| 1840 | optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1841 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1842 | err = |
| 1843 | sock->ops->getsockopt(sock, level, optname, optval, |
| 1844 | optlen); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1845 | out_put: |
| 1846 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | } |
| 1848 | return err; |
| 1849 | } |
| 1850 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | /* |
| 1852 | * Shutdown a socket. |
| 1853 | */ |
| 1854 | |
| 1855 | asmlinkage long sys_shutdown(int fd, int how) |
| 1856 | { |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1857 | int err, fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | struct socket *sock; |
| 1859 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1860 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
| 1861 | if (sock != NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1862 | err = security_socket_shutdown(sock, how); |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1863 | if (!err) |
| 1864 | err = sock->ops->shutdown(sock, how); |
| 1865 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1866 | } |
| 1867 | return err; |
| 1868 | } |
| 1869 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1870 | /* 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] | 1871 | * fields which are the same type (int / unsigned) on our platforms. |
| 1872 | */ |
| 1873 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) |
| 1874 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) |
| 1875 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) |
| 1876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | /* |
| 1878 | * BSD sendmsg interface |
| 1879 | */ |
| 1880 | |
| 1881 | asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) |
| 1882 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1883 | struct compat_msghdr __user *msg_compat = |
| 1884 | (struct compat_msghdr __user *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | struct socket *sock; |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1886 | struct sockaddr_storage address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1887 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
Alex Williamson | b9d717a | 2005-09-26 14:28:02 -0700 | [diff] [blame] | 1888 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1889 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
| 1890 | /* 20 is size of ipv6_pktinfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | unsigned char *ctl_buf = ctl; |
| 1892 | struct msghdr msg_sys; |
| 1893 | int err, ctl_len, iov_size, total_len; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1894 | int fput_needed; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1895 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1896 | err = -EFAULT; |
| 1897 | if (MSG_CMSG_COMPAT & flags) { |
| 1898 | if (get_compat_msghdr(&msg_sys, msg_compat)) |
| 1899 | return -EFAULT; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1900 | } |
| 1901 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1902 | return -EFAULT; |
| 1903 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1904 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1905 | if (!sock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | goto out; |
| 1907 | |
| 1908 | /* do not move before msg_sys is valid */ |
| 1909 | err = -EMSGSIZE; |
| 1910 | if (msg_sys.msg_iovlen > UIO_MAXIOV) |
| 1911 | goto out_put; |
| 1912 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1913 | /* Check whether to allocate the iovec area */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1914 | err = -ENOMEM; |
| 1915 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); |
| 1916 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { |
| 1917 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
| 1918 | if (!iov) |
| 1919 | goto out_put; |
| 1920 | } |
| 1921 | |
| 1922 | /* This will also move the address data into kernel space */ |
| 1923 | if (MSG_CMSG_COMPAT & flags) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1924 | err = verify_compat_iovec(&msg_sys, iov, |
| 1925 | (struct sockaddr *)&address, |
| 1926 | VERIFY_READ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1927 | } else |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 1928 | err = verify_iovec(&msg_sys, iov, |
| 1929 | (struct sockaddr *)&address, |
| 1930 | VERIFY_READ); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1931 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | goto out_freeiov; |
| 1933 | total_len = err; |
| 1934 | |
| 1935 | err = -ENOBUFS; |
| 1936 | |
| 1937 | if (msg_sys.msg_controllen > INT_MAX) |
| 1938 | goto out_freeiov; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1939 | ctl_len = msg_sys.msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1941 | err = |
| 1942 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, |
| 1943 | sizeof(ctl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1944 | if (err) |
| 1945 | goto out_freeiov; |
| 1946 | ctl_buf = msg_sys.msg_control; |
Al Viro | 8920e8f | 2005-09-07 18:28:51 -0700 | [diff] [blame] | 1947 | ctl_len = msg_sys.msg_controllen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | } else if (ctl_len) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1949 | if (ctl_len > sizeof(ctl)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1950 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1951 | if (ctl_buf == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | goto out_freeiov; |
| 1953 | } |
| 1954 | err = -EFAULT; |
| 1955 | /* |
| 1956 | * Careful! Before this, msg_sys.msg_control contains a user pointer. |
| 1957 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted |
| 1958 | * checking falls down on this. |
| 1959 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1960 | if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, |
| 1961 | ctl_len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | goto out_freectl; |
| 1963 | msg_sys.msg_control = ctl_buf; |
| 1964 | } |
| 1965 | msg_sys.msg_flags = flags; |
| 1966 | |
| 1967 | if (sock->file->f_flags & O_NONBLOCK) |
| 1968 | msg_sys.msg_flags |= MSG_DONTWAIT; |
| 1969 | err = sock_sendmsg(sock, &msg_sys, total_len); |
| 1970 | |
| 1971 | out_freectl: |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1972 | if (ctl_buf != ctl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
| 1974 | out_freeiov: |
| 1975 | if (iov != iovstack) |
| 1976 | sock_kfree_s(sock->sk, iov, iov_size); |
| 1977 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1978 | fput_light(sock->file, fput_needed); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1979 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | return err; |
| 1981 | } |
| 1982 | |
| 1983 | /* |
| 1984 | * BSD recvmsg interface |
| 1985 | */ |
| 1986 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1987 | asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, |
| 1988 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1990 | struct compat_msghdr __user *msg_compat = |
| 1991 | (struct compat_msghdr __user *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1992 | struct socket *sock; |
| 1993 | struct iovec iovstack[UIO_FASTIOV]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 1994 | struct iovec *iov = iovstack; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | struct msghdr msg_sys; |
| 1996 | unsigned long cmsg_ptr; |
| 1997 | int err, iov_size, total_len, len; |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 1998 | int fput_needed; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | |
| 2000 | /* kernel mode address */ |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2001 | struct sockaddr_storage addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | |
| 2003 | /* user mode address pointers */ |
| 2004 | struct sockaddr __user *uaddr; |
| 2005 | int __user *uaddr_len; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2006 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | if (MSG_CMSG_COMPAT & flags) { |
| 2008 | if (get_compat_msghdr(&msg_sys, msg_compat)) |
| 2009 | return -EFAULT; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2010 | } |
| 2011 | else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) |
| 2012 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2014 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | if (!sock) |
| 2016 | goto out; |
| 2017 | |
| 2018 | err = -EMSGSIZE; |
| 2019 | if (msg_sys.msg_iovlen > UIO_MAXIOV) |
| 2020 | goto out_put; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2021 | |
| 2022 | /* Check whether to allocate the iovec area */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | err = -ENOMEM; |
| 2024 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); |
| 2025 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { |
| 2026 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
| 2027 | if (!iov) |
| 2028 | goto out_put; |
| 2029 | } |
| 2030 | |
| 2031 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2032 | * Save the user-mode address (verify_iovec will change the |
| 2033 | * kernel msghdr to use the kernel address space) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2035 | |
Stephen Hemminger | cfcabdc | 2007-10-09 01:59:42 -0700 | [diff] [blame] | 2036 | uaddr = (__force void __user *)msg_sys.msg_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | uaddr_len = COMPAT_NAMELEN(msg); |
| 2038 | if (MSG_CMSG_COMPAT & flags) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2039 | err = verify_compat_iovec(&msg_sys, iov, |
| 2040 | (struct sockaddr *)&addr, |
| 2041 | VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | } else |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2043 | err = verify_iovec(&msg_sys, iov, |
| 2044 | (struct sockaddr *)&addr, |
| 2045 | VERIFY_WRITE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | if (err < 0) |
| 2047 | goto out_freeiov; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2048 | total_len = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2049 | |
| 2050 | cmsg_ptr = (unsigned long)msg_sys.msg_control; |
Ulrich Drepper | 4a19542 | 2007-07-15 23:40:34 -0700 | [diff] [blame] | 2051 | msg_sys.msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2052 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | if (sock->file->f_flags & O_NONBLOCK) |
| 2054 | flags |= MSG_DONTWAIT; |
| 2055 | err = sock_recvmsg(sock, &msg_sys, total_len, flags); |
| 2056 | if (err < 0) |
| 2057 | goto out_freeiov; |
| 2058 | len = err; |
| 2059 | |
| 2060 | if (uaddr != NULL) { |
YOSHIFUJI Hideaki | 230b183 | 2008-07-19 22:35:47 -0700 | [diff] [blame] | 2061 | err = move_addr_to_user((struct sockaddr *)&addr, |
| 2062 | msg_sys.msg_namelen, uaddr, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2063 | uaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2064 | if (err < 0) |
| 2065 | goto out_freeiov; |
| 2066 | } |
David S. Miller | 37f7f42 | 2005-09-16 16:51:01 -0700 | [diff] [blame] | 2067 | err = __put_user((msg_sys.msg_flags & ~MSG_CMSG_COMPAT), |
| 2068 | COMPAT_FLAGS(msg)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | if (err) |
| 2070 | goto out_freeiov; |
| 2071 | if (MSG_CMSG_COMPAT & flags) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2072 | err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2073 | &msg_compat->msg_controllen); |
| 2074 | else |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2075 | err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | &msg->msg_controllen); |
| 2077 | if (err) |
| 2078 | goto out_freeiov; |
| 2079 | err = len; |
| 2080 | |
| 2081 | out_freeiov: |
| 2082 | if (iov != iovstack) |
| 2083 | sock_kfree_s(sock->sk, iov, iov_size); |
| 2084 | out_put: |
Benjamin LaHaise | 6cb153c | 2006-03-20 22:27:12 -0800 | [diff] [blame] | 2085 | fput_light(sock->file, fput_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2086 | out: |
| 2087 | return err; |
| 2088 | } |
| 2089 | |
| 2090 | #ifdef __ARCH_WANT_SYS_SOCKETCALL |
| 2091 | |
| 2092 | /* Argument list sizes for sys_socketcall */ |
| 2093 | #define AL(x) ((x) * sizeof(unsigned long)) |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2094 | static const unsigned char nargs[19]={ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2095 | AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), |
| 2096 | AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2097 | AL(6),AL(2),AL(5),AL(5),AL(3),AL(3), |
| 2098 | AL(6) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2099 | }; |
| 2100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2101 | #undef AL |
| 2102 | |
| 2103 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2104 | * System call vectors. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | * |
| 2106 | * Argument checking cleaned up. Saved 20% in size. |
| 2107 | * This function doesn't need to set the kernel lock because |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2108 | * it is set by the callees. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | */ |
| 2110 | |
| 2111 | asmlinkage long sys_socketcall(int call, unsigned long __user *args) |
| 2112 | { |
| 2113 | unsigned long a[6]; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2114 | unsigned long a0, a1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | int err; |
| 2116 | |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2117 | if (call < 1 || call > SYS_PACCEPT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | return -EINVAL; |
| 2119 | |
| 2120 | /* copy_from_user should be SMP safe. */ |
| 2121 | if (copy_from_user(a, args, nargs[call])) |
| 2122 | return -EFAULT; |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2123 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2124 | err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
David Woodhouse | 3ec3b2f | 2005-05-17 12:08:48 +0100 | [diff] [blame] | 2125 | if (err) |
| 2126 | return err; |
| 2127 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2128 | a0 = a[0]; |
| 2129 | a1 = a[1]; |
| 2130 | |
| 2131 | switch (call) { |
| 2132 | case SYS_SOCKET: |
| 2133 | err = sys_socket(a0, a1, a[2]); |
| 2134 | break; |
| 2135 | case SYS_BIND: |
| 2136 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); |
| 2137 | break; |
| 2138 | case SYS_CONNECT: |
| 2139 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); |
| 2140 | break; |
| 2141 | case SYS_LISTEN: |
| 2142 | err = sys_listen(a0, a1); |
| 2143 | break; |
| 2144 | case SYS_ACCEPT: |
| 2145 | err = |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2146 | do_accept(a0, (struct sockaddr __user *)a1, |
| 2147 | (int __user *)a[2], 0); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2148 | break; |
| 2149 | case SYS_GETSOCKNAME: |
| 2150 | err = |
| 2151 | sys_getsockname(a0, (struct sockaddr __user *)a1, |
| 2152 | (int __user *)a[2]); |
| 2153 | break; |
| 2154 | case SYS_GETPEERNAME: |
| 2155 | err = |
| 2156 | sys_getpeername(a0, (struct sockaddr __user *)a1, |
| 2157 | (int __user *)a[2]); |
| 2158 | break; |
| 2159 | case SYS_SOCKETPAIR: |
| 2160 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); |
| 2161 | break; |
| 2162 | case SYS_SEND: |
| 2163 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); |
| 2164 | break; |
| 2165 | case SYS_SENDTO: |
| 2166 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], |
| 2167 | (struct sockaddr __user *)a[4], a[5]); |
| 2168 | break; |
| 2169 | case SYS_RECV: |
| 2170 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); |
| 2171 | break; |
| 2172 | case SYS_RECVFROM: |
| 2173 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], |
| 2174 | (struct sockaddr __user *)a[4], |
| 2175 | (int __user *)a[5]); |
| 2176 | break; |
| 2177 | case SYS_SHUTDOWN: |
| 2178 | err = sys_shutdown(a0, a1); |
| 2179 | break; |
| 2180 | case SYS_SETSOCKOPT: |
| 2181 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); |
| 2182 | break; |
| 2183 | case SYS_GETSOCKOPT: |
| 2184 | err = |
| 2185 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], |
| 2186 | (int __user *)a[4]); |
| 2187 | break; |
| 2188 | case SYS_SENDMSG: |
| 2189 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2190 | break; |
| 2191 | case SYS_RECVMSG: |
| 2192 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); |
| 2193 | break; |
Ulrich Drepper | aaca0bd | 2008-07-23 21:29:20 -0700 | [diff] [blame] | 2194 | case SYS_PACCEPT: |
| 2195 | err = |
| 2196 | sys_paccept(a0, (struct sockaddr __user *)a1, |
| 2197 | (int __user *)a[2], |
| 2198 | (const sigset_t __user *) a[3], |
| 2199 | a[4], a[5]); |
| 2200 | break; |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2201 | default: |
| 2202 | err = -EINVAL; |
| 2203 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | } |
| 2205 | return err; |
| 2206 | } |
| 2207 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2208 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2209 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2210 | /** |
| 2211 | * sock_register - add a socket protocol handler |
| 2212 | * @ops: description of protocol |
| 2213 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2214 | * This function is called by a protocol handler that wants to |
| 2215 | * advertise its address family, and have it linked into the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2216 | * socket interface. The value ops->family coresponds to the |
| 2217 | * socket system call protocol family. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2219 | int sock_register(const struct net_proto_family *ops) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | { |
| 2221 | int err; |
| 2222 | |
| 2223 | if (ops->family >= NPROTO) { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2224 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
| 2225 | NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2226 | return -ENOBUFS; |
| 2227 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2228 | |
| 2229 | spin_lock(&net_family_lock); |
| 2230 | if (net_families[ops->family]) |
| 2231 | err = -EEXIST; |
| 2232 | else { |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2233 | net_families[ops->family] = ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | err = 0; |
| 2235 | } |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2236 | spin_unlock(&net_family_lock); |
| 2237 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2238 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2239 | return err; |
| 2240 | } |
| 2241 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2242 | /** |
| 2243 | * sock_unregister - remove a protocol handler |
| 2244 | * @family: protocol family to remove |
| 2245 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2246 | * This function is called by a protocol handler that wants to |
| 2247 | * remove its address family, and have it unlinked from the |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2248 | * new socket creation. |
| 2249 | * |
| 2250 | * If protocol handler is a module, then it can use module reference |
| 2251 | * counts to protect against new references. If protocol handler is not |
| 2252 | * a module then it needs to provide its own protection in |
| 2253 | * the ops->create routine. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | */ |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2255 | void sock_unregister(int family) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2256 | { |
Stephen Hemminger | f0fd27d | 2006-08-09 21:03:17 -0700 | [diff] [blame] | 2257 | BUG_ON(family < 0 || family >= NPROTO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2258 | |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2259 | spin_lock(&net_family_lock); |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2260 | net_families[family] = NULL; |
Stephen Hemminger | 55737fd | 2006-09-01 00:23:39 -0700 | [diff] [blame] | 2261 | spin_unlock(&net_family_lock); |
| 2262 | |
| 2263 | synchronize_rcu(); |
| 2264 | |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2265 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2266 | } |
| 2267 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2268 | static int __init sock_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2269 | { |
| 2270 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2271 | * Initialize sock SLAB cache. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | */ |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2274 | sk_init(); |
| 2275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2277 | * Initialize skbuff SLAB cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2278 | */ |
| 2279 | skb_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | |
| 2281 | /* |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2282 | * Initialize the protocols module. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2283 | */ |
| 2284 | |
| 2285 | init_inodecache(); |
| 2286 | register_filesystem(&sock_fs_type); |
| 2287 | sock_mnt = kern_mount(&sock_fs_type); |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2288 | |
| 2289 | /* The real protocol initialization is performed in later initcalls. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | */ |
| 2291 | |
| 2292 | #ifdef CONFIG_NETFILTER |
| 2293 | netfilter_init(); |
| 2294 | #endif |
David S. Miller | cbeb321 | 2005-12-22 12:58:55 -0800 | [diff] [blame] | 2295 | |
| 2296 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2297 | } |
| 2298 | |
Andi Kleen | 77d76ea | 2005-12-22 12:43:42 -0800 | [diff] [blame] | 2299 | core_initcall(sock_init); /* early initcall */ |
| 2300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2301 | #ifdef CONFIG_PROC_FS |
| 2302 | void socket_seq_show(struct seq_file *seq) |
| 2303 | { |
| 2304 | int cpu; |
| 2305 | int counter = 0; |
| 2306 | |
KAMEZAWA Hiroyuki | 6f91204 | 2006-04-10 22:52:50 -0700 | [diff] [blame] | 2307 | for_each_possible_cpu(cpu) |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2308 | counter += per_cpu(sockets_in_use, cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | |
| 2310 | /* It can be negative, by the way. 8) */ |
| 2311 | if (counter < 0) |
| 2312 | counter = 0; |
| 2313 | |
| 2314 | seq_printf(seq, "sockets: used %d\n", counter); |
| 2315 | } |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2316 | #endif /* CONFIG_PROC_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2318 | #ifdef CONFIG_COMPAT |
| 2319 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
Stephen Hemminger | 89bddce | 2006-09-01 00:19:31 -0700 | [diff] [blame] | 2320 | unsigned long arg) |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2321 | { |
| 2322 | struct socket *sock = file->private_data; |
| 2323 | int ret = -ENOIOCTLCMD; |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 2324 | struct sock *sk; |
| 2325 | struct net *net; |
| 2326 | |
| 2327 | sk = sock->sk; |
| 2328 | net = sock_net(sk); |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2329 | |
| 2330 | if (sock->ops->compat_ioctl) |
| 2331 | ret = sock->ops->compat_ioctl(sock, cmd, arg); |
| 2332 | |
David S. Miller | 87de87d | 2008-06-03 09:14:03 -0700 | [diff] [blame] | 2333 | if (ret == -ENOIOCTLCMD && |
| 2334 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) |
| 2335 | ret = compat_wext_handle_ioctl(net, cmd, arg); |
| 2336 | |
Shaun Pereira | 89bbfc9 | 2006-03-21 23:58:08 -0800 | [diff] [blame] | 2337 | return ret; |
| 2338 | } |
| 2339 | #endif |
| 2340 | |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 2341 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
| 2342 | { |
| 2343 | return sock->ops->bind(sock, addr, addrlen); |
| 2344 | } |
| 2345 | |
| 2346 | int kernel_listen(struct socket *sock, int backlog) |
| 2347 | { |
| 2348 | return sock->ops->listen(sock, backlog); |
| 2349 | } |
| 2350 | |
| 2351 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) |
| 2352 | { |
| 2353 | struct sock *sk = sock->sk; |
| 2354 | int err; |
| 2355 | |
| 2356 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, |
| 2357 | newsock); |
| 2358 | if (err < 0) |
| 2359 | goto done; |
| 2360 | |
| 2361 | err = sock->ops->accept(sock, *newsock, flags); |
| 2362 | if (err < 0) { |
| 2363 | sock_release(*newsock); |
Tony Battersby | fa8705b | 2007-10-10 21:09:04 -0700 | [diff] [blame] | 2364 | *newsock = NULL; |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 2365 | goto done; |
| 2366 | } |
| 2367 | |
| 2368 | (*newsock)->ops = sock->ops; |
| 2369 | |
| 2370 | done: |
| 2371 | return err; |
| 2372 | } |
| 2373 | |
| 2374 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, |
YOSHIFUJI Hideaki | 4768fbc | 2007-02-09 23:25:31 +0900 | [diff] [blame] | 2375 | int flags) |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 2376 | { |
| 2377 | return sock->ops->connect(sock, addr, addrlen, flags); |
| 2378 | } |
| 2379 | |
| 2380 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, |
| 2381 | int *addrlen) |
| 2382 | { |
| 2383 | return sock->ops->getname(sock, addr, addrlen, 0); |
| 2384 | } |
| 2385 | |
| 2386 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, |
| 2387 | int *addrlen) |
| 2388 | { |
| 2389 | return sock->ops->getname(sock, addr, addrlen, 1); |
| 2390 | } |
| 2391 | |
| 2392 | int kernel_getsockopt(struct socket *sock, int level, int optname, |
| 2393 | char *optval, int *optlen) |
| 2394 | { |
| 2395 | mm_segment_t oldfs = get_fs(); |
| 2396 | int err; |
| 2397 | |
| 2398 | set_fs(KERNEL_DS); |
| 2399 | if (level == SOL_SOCKET) |
| 2400 | err = sock_getsockopt(sock, level, optname, optval, optlen); |
| 2401 | else |
| 2402 | err = sock->ops->getsockopt(sock, level, optname, optval, |
| 2403 | optlen); |
| 2404 | set_fs(oldfs); |
| 2405 | return err; |
| 2406 | } |
| 2407 | |
| 2408 | int kernel_setsockopt(struct socket *sock, int level, int optname, |
| 2409 | char *optval, int optlen) |
| 2410 | { |
| 2411 | mm_segment_t oldfs = get_fs(); |
| 2412 | int err; |
| 2413 | |
| 2414 | set_fs(KERNEL_DS); |
| 2415 | if (level == SOL_SOCKET) |
| 2416 | err = sock_setsockopt(sock, level, optname, optval, optlen); |
| 2417 | else |
| 2418 | err = sock->ops->setsockopt(sock, level, optname, optval, |
| 2419 | optlen); |
| 2420 | set_fs(oldfs); |
| 2421 | return err; |
| 2422 | } |
| 2423 | |
| 2424 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, |
| 2425 | size_t size, int flags) |
| 2426 | { |
| 2427 | if (sock->ops->sendpage) |
| 2428 | return sock->ops->sendpage(sock, page, offset, size, flags); |
| 2429 | |
| 2430 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 2431 | } |
| 2432 | |
| 2433 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) |
| 2434 | { |
| 2435 | mm_segment_t oldfs = get_fs(); |
| 2436 | int err; |
| 2437 | |
| 2438 | set_fs(KERNEL_DS); |
| 2439 | err = sock->ops->ioctl(sock, cmd, arg); |
| 2440 | set_fs(oldfs); |
| 2441 | |
| 2442 | return err; |
| 2443 | } |
| 2444 | |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 2445 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
| 2446 | { |
| 2447 | return sock->ops->shutdown(sock, how); |
| 2448 | } |
| 2449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2450 | EXPORT_SYMBOL(sock_create); |
| 2451 | EXPORT_SYMBOL(sock_create_kern); |
| 2452 | EXPORT_SYMBOL(sock_create_lite); |
| 2453 | EXPORT_SYMBOL(sock_map_fd); |
| 2454 | EXPORT_SYMBOL(sock_recvmsg); |
| 2455 | EXPORT_SYMBOL(sock_register); |
| 2456 | EXPORT_SYMBOL(sock_release); |
| 2457 | EXPORT_SYMBOL(sock_sendmsg); |
| 2458 | EXPORT_SYMBOL(sock_unregister); |
| 2459 | EXPORT_SYMBOL(sock_wake_async); |
| 2460 | EXPORT_SYMBOL(sockfd_lookup); |
| 2461 | EXPORT_SYMBOL(kernel_sendmsg); |
| 2462 | EXPORT_SYMBOL(kernel_recvmsg); |
Sridhar Samudrala | ac5a488 | 2006-08-07 20:57:31 -0700 | [diff] [blame] | 2463 | EXPORT_SYMBOL(kernel_bind); |
| 2464 | EXPORT_SYMBOL(kernel_listen); |
| 2465 | EXPORT_SYMBOL(kernel_accept); |
| 2466 | EXPORT_SYMBOL(kernel_connect); |
| 2467 | EXPORT_SYMBOL(kernel_getsockname); |
| 2468 | EXPORT_SYMBOL(kernel_getpeername); |
| 2469 | EXPORT_SYMBOL(kernel_getsockopt); |
| 2470 | EXPORT_SYMBOL(kernel_setsockopt); |
| 2471 | EXPORT_SYMBOL(kernel_sendpage); |
| 2472 | EXPORT_SYMBOL(kernel_sock_ioctl); |
Trond Myklebust | 91cf45f | 2007-11-12 18:10:39 -0800 | [diff] [blame] | 2473 | EXPORT_SYMBOL(kernel_sock_shutdown); |