Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * Generic socket support routines. Memory allocators, socket lock/release |
| 7 | * handler for protocols to use and generic option handler. |
| 8 | * |
| 9 | * |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 10 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * Florian La Roche, <flla@stud.uni-sb.de> |
| 13 | * Alan Cox, <A.Cox@swansea.ac.uk> |
| 14 | * |
| 15 | * Fixes: |
| 16 | * Alan Cox : Numerous verify_area() problems |
| 17 | * Alan Cox : Connecting on a connecting socket |
| 18 | * now returns an error for tcp. |
| 19 | * Alan Cox : sock->protocol is set correctly. |
| 20 | * and is not sometimes left as 0. |
| 21 | * Alan Cox : connect handles icmp errors on a |
| 22 | * connect properly. Unfortunately there |
| 23 | * is a restart syscall nasty there. I |
| 24 | * can't match BSD without hacking the C |
| 25 | * library. Ideas urgently sought! |
| 26 | * Alan Cox : Disallow bind() to addresses that are |
| 27 | * not ours - especially broadcast ones!! |
| 28 | * Alan Cox : Socket 1024 _IS_ ok for users. (fencepost) |
| 29 | * Alan Cox : sock_wfree/sock_rfree don't destroy sockets, |
| 30 | * instead they leave that for the DESTROY timer. |
| 31 | * Alan Cox : Clean up error flag in accept |
| 32 | * Alan Cox : TCP ack handling is buggy, the DESTROY timer |
| 33 | * was buggy. Put a remove_sock() in the handler |
| 34 | * for memory when we hit 0. Also altered the timer |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 35 | * code. The ACK stuff can wait and needs major |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | * TCP layer surgery. |
| 37 | * Alan Cox : Fixed TCP ack bug, removed remove sock |
| 38 | * and fixed timer/inet_bh race. |
| 39 | * Alan Cox : Added zapped flag for TCP |
| 40 | * Alan Cox : Move kfree_skb into skbuff.c and tidied up surplus code |
| 41 | * Alan Cox : for new sk_buff allocations wmalloc/rmalloc now call alloc_skb |
| 42 | * Alan Cox : kfree_s calls now are kfree_skbmem so we can track skb resources |
| 43 | * Alan Cox : Supports socket option broadcast now as does udp. Packet and raw need fixing. |
| 44 | * Alan Cox : Added RCVBUF,SNDBUF size setting. It suddenly occurred to me how easy it was so... |
| 45 | * Rick Sladkey : Relaxed UDP rules for matching packets. |
| 46 | * C.E.Hawkins : IFF_PROMISC/SIOCGHWADDR support |
| 47 | * Pauline Middelink : identd support |
| 48 | * Alan Cox : Fixed connect() taking signals I think. |
| 49 | * Alan Cox : SO_LINGER supported |
| 50 | * Alan Cox : Error reporting fixes |
| 51 | * Anonymous : inet_create tidied up (sk->reuse setting) |
| 52 | * Alan Cox : inet sockets don't set sk->type! |
| 53 | * Alan Cox : Split socket option code |
| 54 | * Alan Cox : Callbacks |
| 55 | * Alan Cox : Nagle flag for Charles & Johannes stuff |
| 56 | * Alex : Removed restriction on inet fioctl |
| 57 | * Alan Cox : Splitting INET from NET core |
| 58 | * Alan Cox : Fixed bogus SO_TYPE handling in getsockopt() |
| 59 | * Adam Caldwell : Missing return in SO_DONTROUTE/SO_DEBUG code |
| 60 | * Alan Cox : Split IP from generic code |
| 61 | * Alan Cox : New kfree_skbmem() |
| 62 | * Alan Cox : Make SO_DEBUG superuser only. |
| 63 | * Alan Cox : Allow anyone to clear SO_DEBUG |
| 64 | * (compatibility fix) |
| 65 | * Alan Cox : Added optimistic memory grabbing for AF_UNIX throughput. |
| 66 | * Alan Cox : Allocator for a socket is settable. |
| 67 | * Alan Cox : SO_ERROR includes soft errors. |
| 68 | * Alan Cox : Allow NULL arguments on some SO_ opts |
| 69 | * Alan Cox : Generic socket allocation to make hooks |
| 70 | * easier (suggested by Craig Metz). |
| 71 | * Michael Pall : SO_ERROR returns positive errno again |
| 72 | * Steve Whitehouse: Added default destructor to free |
| 73 | * protocol private data. |
| 74 | * Steve Whitehouse: Added various other default routines |
| 75 | * common to several socket families. |
| 76 | * Chris Evans : Call suser() check last on F_SETOWN |
| 77 | * Jay Schulist : Added SO_ATTACH_FILTER and SO_DETACH_FILTER. |
| 78 | * Andi Kleen : Add sock_kmalloc()/sock_kfree_s() |
| 79 | * Andi Kleen : Fix write_space callback |
| 80 | * Chris Evans : Security fixes - signedness again |
| 81 | * Arnaldo C. Melo : cleanups, use skb_queue_purge |
| 82 | * |
| 83 | * To Fix: |
| 84 | * |
| 85 | * |
| 86 | * This program is free software; you can redistribute it and/or |
| 87 | * modify it under the terms of the GNU General Public License |
| 88 | * as published by the Free Software Foundation; either version |
| 89 | * 2 of the License, or (at your option) any later version. |
| 90 | */ |
| 91 | |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 92 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | #include <linux/errno.h> |
| 94 | #include <linux/types.h> |
| 95 | #include <linux/socket.h> |
| 96 | #include <linux/in.h> |
| 97 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | #include <linux/module.h> |
| 99 | #include <linux/proc_fs.h> |
| 100 | #include <linux/seq_file.h> |
| 101 | #include <linux/sched.h> |
| 102 | #include <linux/timer.h> |
| 103 | #include <linux/string.h> |
| 104 | #include <linux/sockios.h> |
| 105 | #include <linux/net.h> |
| 106 | #include <linux/mm.h> |
| 107 | #include <linux/slab.h> |
| 108 | #include <linux/interrupt.h> |
| 109 | #include <linux/poll.h> |
| 110 | #include <linux/tcp.h> |
| 111 | #include <linux/init.h> |
Al Viro | a1f8e7f | 2006-10-19 16:08:53 -0400 | [diff] [blame] | 112 | #include <linux/highmem.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | #include <asm/uaccess.h> |
| 115 | #include <asm/system.h> |
| 116 | |
| 117 | #include <linux/netdevice.h> |
| 118 | #include <net/protocol.h> |
| 119 | #include <linux/skbuff.h> |
Eric W. Biederman | 457c4cb | 2007-09-12 12:01:34 +0200 | [diff] [blame] | 120 | #include <net/net_namespace.h> |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 121 | #include <net/request_sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | #include <net/sock.h> |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 123 | #include <linux/net_tstamp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | #include <net/xfrm.h> |
| 125 | #include <linux/ipsec.h> |
| 126 | |
| 127 | #include <linux/filter.h> |
| 128 | |
| 129 | #ifdef CONFIG_INET |
| 130 | #include <net/tcp.h> |
| 131 | #endif |
| 132 | |
Ingo Molnar | da21f24 | 2006-07-03 00:25:12 -0700 | [diff] [blame] | 133 | /* |
| 134 | * Each address family might have different locking rules, so we have |
| 135 | * one slock key per address family: |
| 136 | */ |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 137 | static struct lock_class_key af_family_keys[AF_MAX]; |
| 138 | static struct lock_class_key af_family_slock_keys[AF_MAX]; |
| 139 | |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 140 | /* |
| 141 | * Make lock validator output more readable. (we pre-construct these |
| 142 | * strings build-time, so that runtime initialization of socket |
| 143 | * locks is fast): |
| 144 | */ |
| 145 | static const char *af_family_key_strings[AF_MAX+1] = { |
| 146 | "sk_lock-AF_UNSPEC", "sk_lock-AF_UNIX" , "sk_lock-AF_INET" , |
| 147 | "sk_lock-AF_AX25" , "sk_lock-AF_IPX" , "sk_lock-AF_APPLETALK", |
| 148 | "sk_lock-AF_NETROM", "sk_lock-AF_BRIDGE" , "sk_lock-AF_ATMPVC" , |
| 149 | "sk_lock-AF_X25" , "sk_lock-AF_INET6" , "sk_lock-AF_ROSE" , |
| 150 | "sk_lock-AF_DECnet", "sk_lock-AF_NETBEUI" , "sk_lock-AF_SECURITY" , |
| 151 | "sk_lock-AF_KEY" , "sk_lock-AF_NETLINK" , "sk_lock-AF_PACKET" , |
| 152 | "sk_lock-AF_ASH" , "sk_lock-AF_ECONET" , "sk_lock-AF_ATMSVC" , |
Andy Grover | cbd151b | 2009-02-26 23:43:19 -0800 | [diff] [blame] | 153 | "sk_lock-AF_RDS" , "sk_lock-AF_SNA" , "sk_lock-AF_IRDA" , |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 154 | "sk_lock-AF_PPPOX" , "sk_lock-AF_WANPIPE" , "sk_lock-AF_LLC" , |
Oliver Hartkopp | cd05acf | 2007-12-16 15:59:24 -0800 | [diff] [blame] | 155 | "sk_lock-27" , "sk_lock-28" , "sk_lock-AF_CAN" , |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 156 | "sk_lock-AF_TIPC" , "sk_lock-AF_BLUETOOTH", "sk_lock-IUCV" , |
Remi Denis-Courmont | bce7b15 | 2008-09-22 19:51:15 -0700 | [diff] [blame] | 157 | "sk_lock-AF_RXRPC" , "sk_lock-AF_ISDN" , "sk_lock-AF_PHONET" , |
| 158 | "sk_lock-AF_MAX" |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 159 | }; |
| 160 | static const char *af_family_slock_key_strings[AF_MAX+1] = { |
| 161 | "slock-AF_UNSPEC", "slock-AF_UNIX" , "slock-AF_INET" , |
| 162 | "slock-AF_AX25" , "slock-AF_IPX" , "slock-AF_APPLETALK", |
| 163 | "slock-AF_NETROM", "slock-AF_BRIDGE" , "slock-AF_ATMPVC" , |
| 164 | "slock-AF_X25" , "slock-AF_INET6" , "slock-AF_ROSE" , |
| 165 | "slock-AF_DECnet", "slock-AF_NETBEUI" , "slock-AF_SECURITY" , |
| 166 | "slock-AF_KEY" , "slock-AF_NETLINK" , "slock-AF_PACKET" , |
| 167 | "slock-AF_ASH" , "slock-AF_ECONET" , "slock-AF_ATMSVC" , |
Andy Grover | cbd151b | 2009-02-26 23:43:19 -0800 | [diff] [blame] | 168 | "slock-AF_RDS" , "slock-AF_SNA" , "slock-AF_IRDA" , |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 169 | "slock-AF_PPPOX" , "slock-AF_WANPIPE" , "slock-AF_LLC" , |
Oliver Hartkopp | cd05acf | 2007-12-16 15:59:24 -0800 | [diff] [blame] | 170 | "slock-27" , "slock-28" , "slock-AF_CAN" , |
David Howells | 17926a7 | 2007-04-26 15:48:28 -0700 | [diff] [blame] | 171 | "slock-AF_TIPC" , "slock-AF_BLUETOOTH", "slock-AF_IUCV" , |
Remi Denis-Courmont | bce7b15 | 2008-09-22 19:51:15 -0700 | [diff] [blame] | 172 | "slock-AF_RXRPC" , "slock-AF_ISDN" , "slock-AF_PHONET" , |
| 173 | "slock-AF_MAX" |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 174 | }; |
Peter Zijlstra | 443aef0 | 2007-07-19 01:49:00 -0700 | [diff] [blame] | 175 | static const char *af_family_clock_key_strings[AF_MAX+1] = { |
| 176 | "clock-AF_UNSPEC", "clock-AF_UNIX" , "clock-AF_INET" , |
| 177 | "clock-AF_AX25" , "clock-AF_IPX" , "clock-AF_APPLETALK", |
| 178 | "clock-AF_NETROM", "clock-AF_BRIDGE" , "clock-AF_ATMPVC" , |
| 179 | "clock-AF_X25" , "clock-AF_INET6" , "clock-AF_ROSE" , |
| 180 | "clock-AF_DECnet", "clock-AF_NETBEUI" , "clock-AF_SECURITY" , |
| 181 | "clock-AF_KEY" , "clock-AF_NETLINK" , "clock-AF_PACKET" , |
| 182 | "clock-AF_ASH" , "clock-AF_ECONET" , "clock-AF_ATMSVC" , |
Andy Grover | cbd151b | 2009-02-26 23:43:19 -0800 | [diff] [blame] | 183 | "clock-AF_RDS" , "clock-AF_SNA" , "clock-AF_IRDA" , |
Peter Zijlstra | 443aef0 | 2007-07-19 01:49:00 -0700 | [diff] [blame] | 184 | "clock-AF_PPPOX" , "clock-AF_WANPIPE" , "clock-AF_LLC" , |
Oliver Hartkopp | b4942af | 2008-07-23 14:06:04 -0700 | [diff] [blame] | 185 | "clock-27" , "clock-28" , "clock-AF_CAN" , |
David Howells | e51f802 | 2007-07-21 19:30:16 -0700 | [diff] [blame] | 186 | "clock-AF_TIPC" , "clock-AF_BLUETOOTH", "clock-AF_IUCV" , |
Remi Denis-Courmont | bce7b15 | 2008-09-22 19:51:15 -0700 | [diff] [blame] | 187 | "clock-AF_RXRPC" , "clock-AF_ISDN" , "clock-AF_PHONET" , |
| 188 | "clock-AF_MAX" |
Peter Zijlstra | 443aef0 | 2007-07-19 01:49:00 -0700 | [diff] [blame] | 189 | }; |
Ingo Molnar | da21f24 | 2006-07-03 00:25:12 -0700 | [diff] [blame] | 190 | |
| 191 | /* |
| 192 | * sk_callback_lock locking rules are per-address-family, |
| 193 | * so split the lock classes by using a per-AF key: |
| 194 | */ |
| 195 | static struct lock_class_key af_callback_keys[AF_MAX]; |
| 196 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | /* Take into consideration the size of the struct sk_buff overhead in the |
| 198 | * determination of these values, since that is non-constant across |
| 199 | * platforms. This makes socket queueing behavior and performance |
| 200 | * not depend upon such differences. |
| 201 | */ |
| 202 | #define _SK_MEM_PACKETS 256 |
| 203 | #define _SK_MEM_OVERHEAD (sizeof(struct sk_buff) + 256) |
| 204 | #define SK_WMEM_MAX (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS) |
| 205 | #define SK_RMEM_MAX (_SK_MEM_OVERHEAD * _SK_MEM_PACKETS) |
| 206 | |
| 207 | /* Run time adjustable parameters. */ |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 208 | __u32 sysctl_wmem_max __read_mostly = SK_WMEM_MAX; |
| 209 | __u32 sysctl_rmem_max __read_mostly = SK_RMEM_MAX; |
| 210 | __u32 sysctl_wmem_default __read_mostly = SK_WMEM_MAX; |
| 211 | __u32 sysctl_rmem_default __read_mostly = SK_RMEM_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | /* Maximal space eaten by iovec or ancilliary data plus some space */ |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 214 | int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen) |
| 217 | { |
| 218 | struct timeval tv; |
| 219 | |
| 220 | if (optlen < sizeof(tv)) |
| 221 | return -EINVAL; |
| 222 | if (copy_from_user(&tv, optval, sizeof(tv))) |
| 223 | return -EFAULT; |
Vasily Averin | ba78073 | 2007-05-24 16:58:54 -0700 | [diff] [blame] | 224 | if (tv.tv_usec < 0 || tv.tv_usec >= USEC_PER_SEC) |
| 225 | return -EDOM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
Vasily Averin | ba78073 | 2007-05-24 16:58:54 -0700 | [diff] [blame] | 227 | if (tv.tv_sec < 0) { |
Andrew Morton | 6f11df8 | 2007-07-09 13:16:00 -0700 | [diff] [blame] | 228 | static int warned __read_mostly; |
| 229 | |
Vasily Averin | ba78073 | 2007-05-24 16:58:54 -0700 | [diff] [blame] | 230 | *timeo_p = 0; |
Ilpo Järvinen | 50aab54 | 2008-05-02 16:20:10 -0700 | [diff] [blame] | 231 | if (warned < 10 && net_ratelimit()) { |
Vasily Averin | ba78073 | 2007-05-24 16:58:54 -0700 | [diff] [blame] | 232 | warned++; |
| 233 | printk(KERN_INFO "sock_set_timeout: `%s' (pid %d) " |
| 234 | "tries to set negative timeout\n", |
Pavel Emelyanov | ba25f9d | 2007-10-18 23:40:40 -0700 | [diff] [blame] | 235 | current->comm, task_pid_nr(current)); |
Ilpo Järvinen | 50aab54 | 2008-05-02 16:20:10 -0700 | [diff] [blame] | 236 | } |
Vasily Averin | ba78073 | 2007-05-24 16:58:54 -0700 | [diff] [blame] | 237 | return 0; |
| 238 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | *timeo_p = MAX_SCHEDULE_TIMEOUT; |
| 240 | if (tv.tv_sec == 0 && tv.tv_usec == 0) |
| 241 | return 0; |
| 242 | if (tv.tv_sec < (MAX_SCHEDULE_TIMEOUT/HZ - 1)) |
| 243 | *timeo_p = tv.tv_sec*HZ + (tv.tv_usec+(1000000/HZ-1))/(1000000/HZ); |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | static void sock_warn_obsolete_bsdism(const char *name) |
| 248 | { |
| 249 | static int warned; |
| 250 | static char warncomm[TASK_COMM_LEN]; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 251 | if (strcmp(warncomm, current->comm) && warned < 5) { |
| 252 | strcpy(warncomm, current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | printk(KERN_WARNING "process `%s' is using obsolete " |
| 254 | "%s SO_BSDCOMPAT\n", warncomm, name); |
| 255 | warned++; |
| 256 | } |
| 257 | } |
| 258 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 259 | static void sock_disable_timestamp(struct sock *sk, int flag) |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 260 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 261 | if (sock_flag(sk, flag)) { |
| 262 | sock_reset_flag(sk, flag); |
| 263 | if (!sock_flag(sk, SOCK_TIMESTAMP) && |
| 264 | !sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE)) { |
| 265 | net_disable_timestamp(); |
| 266 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
| 268 | } |
| 269 | |
| 270 | |
Denis Vlasenko | f0088a5 | 2006-03-28 01:08:21 -0800 | [diff] [blame] | 271 | int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) |
| 272 | { |
| 273 | int err = 0; |
| 274 | int skb_len; |
| 275 | |
Rami Rosen | 9ee6b7f | 2008-05-14 03:50:03 -0700 | [diff] [blame] | 276 | /* Cast sk->rcvbuf to unsigned... It's pointless, but reduces |
Denis Vlasenko | f0088a5 | 2006-03-28 01:08:21 -0800 | [diff] [blame] | 277 | number of warnings when compiling with -W --ANK |
| 278 | */ |
| 279 | if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >= |
| 280 | (unsigned)sk->sk_rcvbuf) { |
| 281 | err = -ENOMEM; |
| 282 | goto out; |
| 283 | } |
| 284 | |
Dmitry Mishin | fda9ef5 | 2006-08-31 15:28:39 -0700 | [diff] [blame] | 285 | err = sk_filter(sk, skb); |
Denis Vlasenko | f0088a5 | 2006-03-28 01:08:21 -0800 | [diff] [blame] | 286 | if (err) |
| 287 | goto out; |
| 288 | |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 289 | if (!sk_rmem_schedule(sk, skb->truesize)) { |
| 290 | err = -ENOBUFS; |
| 291 | goto out; |
| 292 | } |
| 293 | |
Denis Vlasenko | f0088a5 | 2006-03-28 01:08:21 -0800 | [diff] [blame] | 294 | skb->dev = NULL; |
| 295 | skb_set_owner_r(skb, sk); |
David S. Miller | 49ad959 | 2008-12-17 22:11:38 -0800 | [diff] [blame] | 296 | |
Denis Vlasenko | f0088a5 | 2006-03-28 01:08:21 -0800 | [diff] [blame] | 297 | /* Cache the SKB length before we tack it onto the receive |
| 298 | * queue. Once it is added it no longer belongs to us and |
| 299 | * may be freed by other threads of control pulling packets |
| 300 | * from the queue. |
| 301 | */ |
| 302 | skb_len = skb->len; |
| 303 | |
| 304 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 305 | |
| 306 | if (!sock_flag(sk, SOCK_DEAD)) |
| 307 | sk->sk_data_ready(sk, skb_len); |
| 308 | out: |
| 309 | return err; |
| 310 | } |
| 311 | EXPORT_SYMBOL(sock_queue_rcv_skb); |
| 312 | |
Arnaldo Carvalho de Melo | 58a5a7b | 2006-11-16 14:06:06 -0200 | [diff] [blame] | 313 | int sk_receive_skb(struct sock *sk, struct sk_buff *skb, const int nested) |
Denis Vlasenko | f0088a5 | 2006-03-28 01:08:21 -0800 | [diff] [blame] | 314 | { |
| 315 | int rc = NET_RX_SUCCESS; |
| 316 | |
Dmitry Mishin | fda9ef5 | 2006-08-31 15:28:39 -0700 | [diff] [blame] | 317 | if (sk_filter(sk, skb)) |
Denis Vlasenko | f0088a5 | 2006-03-28 01:08:21 -0800 | [diff] [blame] | 318 | goto discard_and_relse; |
| 319 | |
| 320 | skb->dev = NULL; |
| 321 | |
Arnaldo Carvalho de Melo | 58a5a7b | 2006-11-16 14:06:06 -0200 | [diff] [blame] | 322 | if (nested) |
| 323 | bh_lock_sock_nested(sk); |
| 324 | else |
| 325 | bh_lock_sock(sk); |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 326 | if (!sock_owned_by_user(sk)) { |
| 327 | /* |
| 328 | * trylock + unlock semantics: |
| 329 | */ |
| 330 | mutex_acquire(&sk->sk_lock.dep_map, 0, 1, _RET_IP_); |
| 331 | |
Peter Zijlstra | c57943a | 2008-10-07 14:18:42 -0700 | [diff] [blame] | 332 | rc = sk_backlog_rcv(sk, skb); |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 333 | |
| 334 | mutex_release(&sk->sk_lock.dep_map, 1, _RET_IP_); |
| 335 | } else |
Denis Vlasenko | f0088a5 | 2006-03-28 01:08:21 -0800 | [diff] [blame] | 336 | sk_add_backlog(sk, skb); |
| 337 | bh_unlock_sock(sk); |
| 338 | out: |
| 339 | sock_put(sk); |
| 340 | return rc; |
| 341 | discard_and_relse: |
| 342 | kfree_skb(skb); |
| 343 | goto out; |
| 344 | } |
| 345 | EXPORT_SYMBOL(sk_receive_skb); |
| 346 | |
| 347 | struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie) |
| 348 | { |
| 349 | struct dst_entry *dst = sk->sk_dst_cache; |
| 350 | |
| 351 | if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) { |
| 352 | sk->sk_dst_cache = NULL; |
| 353 | dst_release(dst); |
| 354 | return NULL; |
| 355 | } |
| 356 | |
| 357 | return dst; |
| 358 | } |
| 359 | EXPORT_SYMBOL(__sk_dst_check); |
| 360 | |
| 361 | struct dst_entry *sk_dst_check(struct sock *sk, u32 cookie) |
| 362 | { |
| 363 | struct dst_entry *dst = sk_dst_get(sk); |
| 364 | |
| 365 | if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) { |
| 366 | sk_dst_reset(sk); |
| 367 | dst_release(dst); |
| 368 | return NULL; |
| 369 | } |
| 370 | |
| 371 | return dst; |
| 372 | } |
| 373 | EXPORT_SYMBOL(sk_dst_check); |
| 374 | |
David S. Miller | 4878809 | 2007-09-14 16:41:03 -0700 | [diff] [blame] | 375 | static int sock_bindtodevice(struct sock *sk, char __user *optval, int optlen) |
| 376 | { |
| 377 | int ret = -ENOPROTOOPT; |
| 378 | #ifdef CONFIG_NETDEVICES |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 379 | struct net *net = sock_net(sk); |
David S. Miller | 4878809 | 2007-09-14 16:41:03 -0700 | [diff] [blame] | 380 | char devname[IFNAMSIZ]; |
| 381 | int index; |
| 382 | |
| 383 | /* Sorry... */ |
| 384 | ret = -EPERM; |
| 385 | if (!capable(CAP_NET_RAW)) |
| 386 | goto out; |
| 387 | |
| 388 | ret = -EINVAL; |
| 389 | if (optlen < 0) |
| 390 | goto out; |
| 391 | |
| 392 | /* Bind this socket to a particular device like "eth0", |
| 393 | * as specified in the passed interface name. If the |
| 394 | * name is "" or the option length is zero the socket |
| 395 | * is not bound. |
| 396 | */ |
| 397 | if (optlen > IFNAMSIZ - 1) |
| 398 | optlen = IFNAMSIZ - 1; |
| 399 | memset(devname, 0, sizeof(devname)); |
| 400 | |
| 401 | ret = -EFAULT; |
| 402 | if (copy_from_user(devname, optval, optlen)) |
| 403 | goto out; |
| 404 | |
| 405 | if (devname[0] == '\0') { |
| 406 | index = 0; |
| 407 | } else { |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 408 | struct net_device *dev = dev_get_by_name(net, devname); |
David S. Miller | 4878809 | 2007-09-14 16:41:03 -0700 | [diff] [blame] | 409 | |
| 410 | ret = -ENODEV; |
| 411 | if (!dev) |
| 412 | goto out; |
| 413 | |
| 414 | index = dev->ifindex; |
| 415 | dev_put(dev); |
| 416 | } |
| 417 | |
| 418 | lock_sock(sk); |
| 419 | sk->sk_bound_dev_if = index; |
| 420 | sk_dst_reset(sk); |
| 421 | release_sock(sk); |
| 422 | |
| 423 | ret = 0; |
| 424 | |
| 425 | out: |
| 426 | #endif |
| 427 | |
| 428 | return ret; |
| 429 | } |
| 430 | |
Pavel Emelyanov | c0ef877 | 2007-11-15 03:03:19 -0800 | [diff] [blame] | 431 | static inline void sock_valbool_flag(struct sock *sk, int bit, int valbool) |
| 432 | { |
| 433 | if (valbool) |
| 434 | sock_set_flag(sk, bit); |
| 435 | else |
| 436 | sock_reset_flag(sk, bit); |
| 437 | } |
| 438 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | /* |
| 440 | * This is meant for all protocols to use and covers goings on |
| 441 | * at the socket level. Everything here is generic. |
| 442 | */ |
| 443 | |
| 444 | int sock_setsockopt(struct socket *sock, int level, int optname, |
| 445 | char __user *optval, int optlen) |
| 446 | { |
| 447 | struct sock *sk=sock->sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | int val; |
| 449 | int valbool; |
| 450 | struct linger ling; |
| 451 | int ret = 0; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 452 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | /* |
| 454 | * Options without arguments |
| 455 | */ |
| 456 | |
David S. Miller | 4878809 | 2007-09-14 16:41:03 -0700 | [diff] [blame] | 457 | if (optname == SO_BINDTODEVICE) |
| 458 | return sock_bindtodevice(sk, optval, optlen); |
| 459 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 460 | if (optlen < sizeof(int)) |
| 461 | return -EINVAL; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | if (get_user(val, (int __user *)optval)) |
| 464 | return -EFAULT; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 465 | |
| 466 | valbool = val?1:0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
| 468 | lock_sock(sk); |
| 469 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 470 | switch(optname) { |
| 471 | case SO_DEBUG: |
| 472 | if (val && !capable(CAP_NET_ADMIN)) { |
| 473 | ret = -EACCES; |
Pavel Emelyanov | c0ef877 | 2007-11-15 03:03:19 -0800 | [diff] [blame] | 474 | } else |
| 475 | sock_valbool_flag(sk, SOCK_DBG, valbool); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 476 | break; |
| 477 | case SO_REUSEADDR: |
| 478 | sk->sk_reuse = valbool; |
| 479 | break; |
| 480 | case SO_TYPE: |
| 481 | case SO_ERROR: |
| 482 | ret = -ENOPROTOOPT; |
| 483 | break; |
| 484 | case SO_DONTROUTE: |
Pavel Emelyanov | c0ef877 | 2007-11-15 03:03:19 -0800 | [diff] [blame] | 485 | sock_valbool_flag(sk, SOCK_LOCALROUTE, valbool); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 486 | break; |
| 487 | case SO_BROADCAST: |
| 488 | sock_valbool_flag(sk, SOCK_BROADCAST, valbool); |
| 489 | break; |
| 490 | case SO_SNDBUF: |
| 491 | /* Don't error on this BSD doesn't and if you think |
| 492 | about it this is right. Otherwise apps have to |
| 493 | play 'guess the biggest size' games. RCVBUF/SNDBUF |
| 494 | are treated in BSD as hints */ |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 495 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 496 | if (val > sysctl_wmem_max) |
| 497 | val = sysctl_wmem_max; |
Patrick McHardy | b0573de | 2005-08-09 19:30:51 -0700 | [diff] [blame] | 498 | set_sndbuf: |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 499 | sk->sk_userlocks |= SOCK_SNDBUF_LOCK; |
| 500 | if ((val * 2) < SOCK_MIN_SNDBUF) |
| 501 | sk->sk_sndbuf = SOCK_MIN_SNDBUF; |
| 502 | else |
| 503 | sk->sk_sndbuf = val * 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 505 | /* |
| 506 | * Wake up sending tasks if we |
| 507 | * upped the value. |
| 508 | */ |
| 509 | sk->sk_write_space(sk); |
| 510 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 512 | case SO_SNDBUFFORCE: |
| 513 | if (!capable(CAP_NET_ADMIN)) { |
| 514 | ret = -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | break; |
| 516 | } |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 517 | goto set_sndbuf; |
| 518 | |
| 519 | case SO_RCVBUF: |
| 520 | /* Don't error on this BSD doesn't and if you think |
| 521 | about it this is right. Otherwise apps have to |
| 522 | play 'guess the biggest size' games. RCVBUF/SNDBUF |
| 523 | are treated in BSD as hints */ |
| 524 | |
| 525 | if (val > sysctl_rmem_max) |
| 526 | val = sysctl_rmem_max; |
| 527 | set_rcvbuf: |
| 528 | sk->sk_userlocks |= SOCK_RCVBUF_LOCK; |
| 529 | /* |
| 530 | * We double it on the way in to account for |
| 531 | * "struct sk_buff" etc. overhead. Applications |
| 532 | * assume that the SO_RCVBUF setting they make will |
| 533 | * allow that much actual data to be received on that |
| 534 | * socket. |
| 535 | * |
| 536 | * Applications are unaware that "struct sk_buff" and |
| 537 | * other overheads allocate from the receive buffer |
| 538 | * during socket buffer allocation. |
| 539 | * |
| 540 | * And after considering the possible alternatives, |
| 541 | * returning the value we actually used in getsockopt |
| 542 | * is the most desirable behavior. |
| 543 | */ |
| 544 | if ((val * 2) < SOCK_MIN_RCVBUF) |
| 545 | sk->sk_rcvbuf = SOCK_MIN_RCVBUF; |
| 546 | else |
| 547 | sk->sk_rcvbuf = val * 2; |
| 548 | break; |
| 549 | |
| 550 | case SO_RCVBUFFORCE: |
| 551 | if (!capable(CAP_NET_ADMIN)) { |
| 552 | ret = -EPERM; |
| 553 | break; |
| 554 | } |
| 555 | goto set_rcvbuf; |
| 556 | |
| 557 | case SO_KEEPALIVE: |
| 558 | #ifdef CONFIG_INET |
| 559 | if (sk->sk_protocol == IPPROTO_TCP) |
| 560 | tcp_set_keepalive(sk, valbool); |
| 561 | #endif |
| 562 | sock_valbool_flag(sk, SOCK_KEEPOPEN, valbool); |
| 563 | break; |
| 564 | |
| 565 | case SO_OOBINLINE: |
| 566 | sock_valbool_flag(sk, SOCK_URGINLINE, valbool); |
| 567 | break; |
| 568 | |
| 569 | case SO_NO_CHECK: |
| 570 | sk->sk_no_check = valbool; |
| 571 | break; |
| 572 | |
| 573 | case SO_PRIORITY: |
| 574 | if ((val >= 0 && val <= 6) || capable(CAP_NET_ADMIN)) |
| 575 | sk->sk_priority = val; |
| 576 | else |
| 577 | ret = -EPERM; |
| 578 | break; |
| 579 | |
| 580 | case SO_LINGER: |
| 581 | if (optlen < sizeof(ling)) { |
| 582 | ret = -EINVAL; /* 1003.1g */ |
| 583 | break; |
| 584 | } |
| 585 | if (copy_from_user(&ling,optval,sizeof(ling))) { |
| 586 | ret = -EFAULT; |
| 587 | break; |
| 588 | } |
| 589 | if (!ling.l_onoff) |
| 590 | sock_reset_flag(sk, SOCK_LINGER); |
| 591 | else { |
| 592 | #if (BITS_PER_LONG == 32) |
| 593 | if ((unsigned int)ling.l_linger >= MAX_SCHEDULE_TIMEOUT/HZ) |
| 594 | sk->sk_lingertime = MAX_SCHEDULE_TIMEOUT; |
| 595 | else |
| 596 | #endif |
| 597 | sk->sk_lingertime = (unsigned int)ling.l_linger * HZ; |
| 598 | sock_set_flag(sk, SOCK_LINGER); |
| 599 | } |
| 600 | break; |
| 601 | |
| 602 | case SO_BSDCOMPAT: |
| 603 | sock_warn_obsolete_bsdism("setsockopt"); |
| 604 | break; |
| 605 | |
| 606 | case SO_PASSCRED: |
| 607 | if (valbool) |
| 608 | set_bit(SOCK_PASSCRED, &sock->flags); |
| 609 | else |
| 610 | clear_bit(SOCK_PASSCRED, &sock->flags); |
| 611 | break; |
| 612 | |
| 613 | case SO_TIMESTAMP: |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 614 | case SO_TIMESTAMPNS: |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 615 | if (valbool) { |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 616 | if (optname == SO_TIMESTAMP) |
| 617 | sock_reset_flag(sk, SOCK_RCVTSTAMPNS); |
| 618 | else |
| 619 | sock_set_flag(sk, SOCK_RCVTSTAMPNS); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 620 | sock_set_flag(sk, SOCK_RCVTSTAMP); |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 621 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 622 | } else { |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 623 | sock_reset_flag(sk, SOCK_RCVTSTAMP); |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 624 | sock_reset_flag(sk, SOCK_RCVTSTAMPNS); |
| 625 | } |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 626 | break; |
| 627 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 628 | case SO_TIMESTAMPING: |
| 629 | if (val & ~SOF_TIMESTAMPING_MASK) { |
| 630 | ret = EINVAL; |
| 631 | break; |
| 632 | } |
| 633 | sock_valbool_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE, |
| 634 | val & SOF_TIMESTAMPING_TX_HARDWARE); |
| 635 | sock_valbool_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE, |
| 636 | val & SOF_TIMESTAMPING_TX_SOFTWARE); |
| 637 | sock_valbool_flag(sk, SOCK_TIMESTAMPING_RX_HARDWARE, |
| 638 | val & SOF_TIMESTAMPING_RX_HARDWARE); |
| 639 | if (val & SOF_TIMESTAMPING_RX_SOFTWARE) |
| 640 | sock_enable_timestamp(sk, |
| 641 | SOCK_TIMESTAMPING_RX_SOFTWARE); |
| 642 | else |
| 643 | sock_disable_timestamp(sk, |
| 644 | SOCK_TIMESTAMPING_RX_SOFTWARE); |
| 645 | sock_valbool_flag(sk, SOCK_TIMESTAMPING_SOFTWARE, |
| 646 | val & SOF_TIMESTAMPING_SOFTWARE); |
| 647 | sock_valbool_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE, |
| 648 | val & SOF_TIMESTAMPING_SYS_HARDWARE); |
| 649 | sock_valbool_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE, |
| 650 | val & SOF_TIMESTAMPING_RAW_HARDWARE); |
| 651 | break; |
| 652 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 653 | case SO_RCVLOWAT: |
| 654 | if (val < 0) |
| 655 | val = INT_MAX; |
| 656 | sk->sk_rcvlowat = val ? : 1; |
| 657 | break; |
| 658 | |
| 659 | case SO_RCVTIMEO: |
| 660 | ret = sock_set_timeout(&sk->sk_rcvtimeo, optval, optlen); |
| 661 | break; |
| 662 | |
| 663 | case SO_SNDTIMEO: |
| 664 | ret = sock_set_timeout(&sk->sk_sndtimeo, optval, optlen); |
| 665 | break; |
| 666 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 667 | case SO_ATTACH_FILTER: |
| 668 | ret = -EINVAL; |
| 669 | if (optlen == sizeof(struct sock_fprog)) { |
| 670 | struct sock_fprog fprog; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 672 | ret = -EFAULT; |
| 673 | if (copy_from_user(&fprog, optval, sizeof(fprog))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 676 | ret = sk_attach_filter(&fprog, sk); |
| 677 | } |
| 678 | break; |
| 679 | |
| 680 | case SO_DETACH_FILTER: |
Pavel Emelyanov | 55b3332 | 2007-10-17 21:21:26 -0700 | [diff] [blame] | 681 | ret = sk_detach_filter(sk); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 682 | break; |
| 683 | |
| 684 | case SO_PASSSEC: |
| 685 | if (valbool) |
| 686 | set_bit(SOCK_PASSSEC, &sock->flags); |
| 687 | else |
| 688 | clear_bit(SOCK_PASSSEC, &sock->flags); |
| 689 | break; |
Laszlo Attila Toth | 4a19ec5 | 2008-01-30 19:08:16 -0800 | [diff] [blame] | 690 | case SO_MARK: |
| 691 | if (!capable(CAP_NET_ADMIN)) |
| 692 | ret = -EPERM; |
| 693 | else { |
| 694 | sk->sk_mark = val; |
| 695 | } |
| 696 | break; |
Catherine Zhang | 877ce7c | 2006-06-29 12:27:47 -0700 | [diff] [blame] | 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /* We implement the SO_SNDLOWAT etc to |
| 699 | not be settable (1003.1g 5.3) */ |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 700 | default: |
| 701 | ret = -ENOPROTOOPT; |
| 702 | break; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 703 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | release_sock(sk); |
| 705 | return ret; |
| 706 | } |
| 707 | |
| 708 | |
| 709 | int sock_getsockopt(struct socket *sock, int level, int optname, |
| 710 | char __user *optval, int __user *optlen) |
| 711 | { |
| 712 | struct sock *sk = sock->sk; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 713 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 714 | union { |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 715 | int val; |
| 716 | struct linger ling; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | struct timeval tm; |
| 718 | } v; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | unsigned int lv = sizeof(int); |
| 721 | int len; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 722 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 723 | if (get_user(len, optlen)) |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 724 | return -EFAULT; |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 725 | if (len < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | return -EINVAL; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 727 | |
Eugene Teo | 50fee1d | 2009-02-23 15:38:41 -0800 | [diff] [blame] | 728 | memset(&v, 0, sizeof(v)); |
Clément Lecigne | df0bca0 | 2009-02-12 16:59:09 -0800 | [diff] [blame] | 729 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 730 | switch(optname) { |
| 731 | case SO_DEBUG: |
| 732 | v.val = sock_flag(sk, SOCK_DBG); |
| 733 | break; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 734 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 735 | case SO_DONTROUTE: |
| 736 | v.val = sock_flag(sk, SOCK_LOCALROUTE); |
| 737 | break; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 738 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 739 | case SO_BROADCAST: |
| 740 | v.val = !!sock_flag(sk, SOCK_BROADCAST); |
| 741 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 743 | case SO_SNDBUF: |
| 744 | v.val = sk->sk_sndbuf; |
| 745 | break; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 746 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 747 | case SO_RCVBUF: |
| 748 | v.val = sk->sk_rcvbuf; |
| 749 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 750 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 751 | case SO_REUSEADDR: |
| 752 | v.val = sk->sk_reuse; |
| 753 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 755 | case SO_KEEPALIVE: |
| 756 | v.val = !!sock_flag(sk, SOCK_KEEPOPEN); |
| 757 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 759 | case SO_TYPE: |
| 760 | v.val = sk->sk_type; |
| 761 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 763 | case SO_ERROR: |
| 764 | v.val = -sock_error(sk); |
| 765 | if (v.val==0) |
| 766 | v.val = xchg(&sk->sk_err_soft, 0); |
| 767 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 768 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 769 | case SO_OOBINLINE: |
| 770 | v.val = !!sock_flag(sk, SOCK_URGINLINE); |
| 771 | break; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 772 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 773 | case SO_NO_CHECK: |
| 774 | v.val = sk->sk_no_check; |
| 775 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 777 | case SO_PRIORITY: |
| 778 | v.val = sk->sk_priority; |
| 779 | break; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 780 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 781 | case SO_LINGER: |
| 782 | lv = sizeof(v.ling); |
| 783 | v.ling.l_onoff = !!sock_flag(sk, SOCK_LINGER); |
| 784 | v.ling.l_linger = sk->sk_lingertime / HZ; |
| 785 | break; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 786 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 787 | case SO_BSDCOMPAT: |
| 788 | sock_warn_obsolete_bsdism("getsockopt"); |
| 789 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 791 | case SO_TIMESTAMP: |
Eric Dumazet | 92f37fd | 2007-03-25 22:14:49 -0700 | [diff] [blame] | 792 | v.val = sock_flag(sk, SOCK_RCVTSTAMP) && |
| 793 | !sock_flag(sk, SOCK_RCVTSTAMPNS); |
| 794 | break; |
| 795 | |
| 796 | case SO_TIMESTAMPNS: |
| 797 | v.val = sock_flag(sk, SOCK_RCVTSTAMPNS); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 798 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 800 | case SO_TIMESTAMPING: |
| 801 | v.val = 0; |
| 802 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
| 803 | v.val |= SOF_TIMESTAMPING_TX_HARDWARE; |
| 804 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
| 805 | v.val |= SOF_TIMESTAMPING_TX_SOFTWARE; |
| 806 | if (sock_flag(sk, SOCK_TIMESTAMPING_RX_HARDWARE)) |
| 807 | v.val |= SOF_TIMESTAMPING_RX_HARDWARE; |
| 808 | if (sock_flag(sk, SOCK_TIMESTAMPING_RX_SOFTWARE)) |
| 809 | v.val |= SOF_TIMESTAMPING_RX_SOFTWARE; |
| 810 | if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) |
| 811 | v.val |= SOF_TIMESTAMPING_SOFTWARE; |
| 812 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE)) |
| 813 | v.val |= SOF_TIMESTAMPING_SYS_HARDWARE; |
| 814 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE)) |
| 815 | v.val |= SOF_TIMESTAMPING_RAW_HARDWARE; |
| 816 | break; |
| 817 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 818 | case SO_RCVTIMEO: |
| 819 | lv=sizeof(struct timeval); |
| 820 | if (sk->sk_rcvtimeo == MAX_SCHEDULE_TIMEOUT) { |
| 821 | v.tm.tv_sec = 0; |
| 822 | v.tm.tv_usec = 0; |
| 823 | } else { |
| 824 | v.tm.tv_sec = sk->sk_rcvtimeo / HZ; |
| 825 | v.tm.tv_usec = ((sk->sk_rcvtimeo % HZ) * 1000000) / HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 826 | } |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 827 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 829 | case SO_SNDTIMEO: |
| 830 | lv=sizeof(struct timeval); |
| 831 | if (sk->sk_sndtimeo == MAX_SCHEDULE_TIMEOUT) { |
| 832 | v.tm.tv_sec = 0; |
| 833 | v.tm.tv_usec = 0; |
| 834 | } else { |
| 835 | v.tm.tv_sec = sk->sk_sndtimeo / HZ; |
| 836 | v.tm.tv_usec = ((sk->sk_sndtimeo % HZ) * 1000000) / HZ; |
| 837 | } |
| 838 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 839 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 840 | case SO_RCVLOWAT: |
| 841 | v.val = sk->sk_rcvlowat; |
| 842 | break; |
Catherine Zhang | 877ce7c | 2006-06-29 12:27:47 -0700 | [diff] [blame] | 843 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 844 | case SO_SNDLOWAT: |
| 845 | v.val=1; |
| 846 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 848 | case SO_PASSCRED: |
| 849 | v.val = test_bit(SOCK_PASSCRED, &sock->flags) ? 1 : 0; |
| 850 | break; |
| 851 | |
| 852 | case SO_PEERCRED: |
| 853 | if (len > sizeof(sk->sk_peercred)) |
| 854 | len = sizeof(sk->sk_peercred); |
| 855 | if (copy_to_user(optval, &sk->sk_peercred, len)) |
| 856 | return -EFAULT; |
| 857 | goto lenout; |
| 858 | |
| 859 | case SO_PEERNAME: |
| 860 | { |
| 861 | char address[128]; |
| 862 | |
| 863 | if (sock->ops->getname(sock, (struct sockaddr *)address, &lv, 2)) |
| 864 | return -ENOTCONN; |
| 865 | if (lv < len) |
| 866 | return -EINVAL; |
| 867 | if (copy_to_user(optval, address, len)) |
| 868 | return -EFAULT; |
| 869 | goto lenout; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | } |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 871 | |
| 872 | /* Dubious BSD thing... Probably nobody even uses it, but |
| 873 | * the UNIX standard wants it for whatever reason... -DaveM |
| 874 | */ |
| 875 | case SO_ACCEPTCONN: |
| 876 | v.val = sk->sk_state == TCP_LISTEN; |
| 877 | break; |
| 878 | |
| 879 | case SO_PASSSEC: |
| 880 | v.val = test_bit(SOCK_PASSSEC, &sock->flags) ? 1 : 0; |
| 881 | break; |
| 882 | |
| 883 | case SO_PEERSEC: |
| 884 | return security_socket_getpeersec_stream(sock, optval, optlen, len); |
| 885 | |
Laszlo Attila Toth | 4a19ec5 | 2008-01-30 19:08:16 -0800 | [diff] [blame] | 886 | case SO_MARK: |
| 887 | v.val = sk->sk_mark; |
| 888 | break; |
| 889 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 890 | default: |
| 891 | return -ENOPROTOOPT; |
| 892 | } |
| 893 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | if (len > lv) |
| 895 | len = lv; |
| 896 | if (copy_to_user(optval, &v, len)) |
| 897 | return -EFAULT; |
| 898 | lenout: |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 899 | if (put_user(len, optlen)) |
| 900 | return -EFAULT; |
| 901 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | } |
| 903 | |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 904 | /* |
| 905 | * Initialize an sk_lock. |
| 906 | * |
| 907 | * (We also register the sk_lock with the lock validator.) |
| 908 | */ |
Dave Jones | b6f99a2 | 2007-03-22 12:27:49 -0700 | [diff] [blame] | 909 | static inline void sock_lock_init(struct sock *sk) |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 910 | { |
Peter Zijlstra | ed07536 | 2006-12-06 20:35:24 -0800 | [diff] [blame] | 911 | sock_lock_init_class_and_name(sk, |
| 912 | af_family_slock_key_strings[sk->sk_family], |
| 913 | af_family_slock_keys + sk->sk_family, |
| 914 | af_family_key_strings[sk->sk_family], |
| 915 | af_family_keys + sk->sk_family); |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 916 | } |
| 917 | |
Pavel Emelyanov | f1a6c4d | 2007-11-01 00:29:45 -0700 | [diff] [blame] | 918 | static void sock_copy(struct sock *nsk, const struct sock *osk) |
| 919 | { |
| 920 | #ifdef CONFIG_SECURITY_NETWORK |
| 921 | void *sptr = nsk->sk_security; |
| 922 | #endif |
| 923 | |
| 924 | memcpy(nsk, osk, osk->sk_prot->obj_size); |
Pavel Emelyanov | f1a6c4d | 2007-11-01 00:29:45 -0700 | [diff] [blame] | 925 | #ifdef CONFIG_SECURITY_NETWORK |
| 926 | nsk->sk_security = sptr; |
| 927 | security_sk_clone(osk, nsk); |
| 928 | #endif |
| 929 | } |
| 930 | |
Pavel Emelyanov | 2e4afe7 | 2007-11-01 00:36:26 -0700 | [diff] [blame] | 931 | static struct sock *sk_prot_alloc(struct proto *prot, gfp_t priority, |
| 932 | int family) |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 933 | { |
| 934 | struct sock *sk; |
| 935 | struct kmem_cache *slab; |
| 936 | |
| 937 | slab = prot->slab; |
| 938 | if (slab != NULL) |
| 939 | sk = kmem_cache_alloc(slab, priority); |
| 940 | else |
| 941 | sk = kmalloc(prot->obj_size, priority); |
| 942 | |
Pavel Emelyanov | 2e4afe7 | 2007-11-01 00:36:26 -0700 | [diff] [blame] | 943 | if (sk != NULL) { |
| 944 | if (security_sk_alloc(sk, family, priority)) |
| 945 | goto out_free; |
| 946 | |
| 947 | if (!try_module_get(prot->owner)) |
| 948 | goto out_free_sec; |
| 949 | } |
| 950 | |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 951 | return sk; |
Pavel Emelyanov | 2e4afe7 | 2007-11-01 00:36:26 -0700 | [diff] [blame] | 952 | |
| 953 | out_free_sec: |
| 954 | security_sk_free(sk); |
| 955 | out_free: |
| 956 | if (slab != NULL) |
| 957 | kmem_cache_free(slab, sk); |
| 958 | else |
| 959 | kfree(sk); |
| 960 | return NULL; |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 961 | } |
| 962 | |
| 963 | static void sk_prot_free(struct proto *prot, struct sock *sk) |
| 964 | { |
| 965 | struct kmem_cache *slab; |
Pavel Emelyanov | 2e4afe7 | 2007-11-01 00:36:26 -0700 | [diff] [blame] | 966 | struct module *owner; |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 967 | |
Pavel Emelyanov | 2e4afe7 | 2007-11-01 00:36:26 -0700 | [diff] [blame] | 968 | owner = prot->owner; |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 969 | slab = prot->slab; |
Pavel Emelyanov | 2e4afe7 | 2007-11-01 00:36:26 -0700 | [diff] [blame] | 970 | |
| 971 | security_sk_free(sk); |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 972 | if (slab != NULL) |
| 973 | kmem_cache_free(slab, sk); |
| 974 | else |
| 975 | kfree(sk); |
Pavel Emelyanov | 2e4afe7 | 2007-11-01 00:36:26 -0700 | [diff] [blame] | 976 | module_put(owner); |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 977 | } |
| 978 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | /** |
| 980 | * sk_alloc - All socket objects are allocated here |
Randy Dunlap | c4ea43c | 2007-10-12 21:17:49 -0700 | [diff] [blame] | 981 | * @net: the applicable net namespace |
Pavel Pisa | 4dc3b16 | 2005-05-01 08:59:25 -0700 | [diff] [blame] | 982 | * @family: protocol family |
| 983 | * @priority: for allocation (%GFP_KERNEL, %GFP_ATOMIC, etc) |
| 984 | * @prot: struct proto associated with this new sock instance |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | */ |
Eric W. Biederman | 1b8d7ae | 2007-10-08 23:24:22 -0700 | [diff] [blame] | 986 | struct sock *sk_alloc(struct net *net, int family, gfp_t priority, |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 987 | struct proto *prot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | { |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 989 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | |
Pavel Emelyanov | 154adbc | 2007-11-01 00:38:43 -0700 | [diff] [blame] | 991 | sk = sk_prot_alloc(prot, priority | __GFP_ZERO, family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | if (sk) { |
Pavel Emelyanov | 154adbc | 2007-11-01 00:38:43 -0700 | [diff] [blame] | 993 | sk->sk_family = family; |
| 994 | /* |
| 995 | * See comment in struct sock definition to understand |
| 996 | * why we need sk_prot_creator -acme |
| 997 | */ |
| 998 | sk->sk_prot = sk->sk_prot_creator = prot; |
| 999 | sock_lock_init(sk); |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1000 | sock_net_set(sk, get_net(net)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | } |
Frank Filz | a79af59 | 2005-09-27 15:23:38 -0700 | [diff] [blame] | 1002 | |
Pavel Emelyanov | 2e4afe7 | 2007-11-01 00:36:26 -0700 | [diff] [blame] | 1003 | return sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | } |
| 1005 | |
| 1006 | void sk_free(struct sock *sk) |
| 1007 | { |
| 1008 | struct sk_filter *filter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
| 1010 | if (sk->sk_destruct) |
| 1011 | sk->sk_destruct(sk); |
| 1012 | |
Dmitry Mishin | fda9ef5 | 2006-08-31 15:28:39 -0700 | [diff] [blame] | 1013 | filter = rcu_dereference(sk->sk_filter); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | if (filter) { |
Pavel Emelyanov | 309dd5f | 2007-10-17 21:21:51 -0700 | [diff] [blame] | 1015 | sk_filter_uncharge(sk, filter); |
Dmitry Mishin | fda9ef5 | 2006-08-31 15:28:39 -0700 | [diff] [blame] | 1016 | rcu_assign_pointer(sk->sk_filter, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | } |
| 1018 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 1019 | sock_disable_timestamp(sk, SOCK_TIMESTAMP); |
| 1020 | sock_disable_timestamp(sk, SOCK_TIMESTAMPING_RX_SOFTWARE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | |
| 1022 | if (atomic_read(&sk->sk_omem_alloc)) |
| 1023 | printk(KERN_DEBUG "%s: optmem leakage (%d bytes) detected.\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 1024 | __func__, atomic_read(&sk->sk_omem_alloc)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1026 | put_net(sock_net(sk)); |
Pavel Emelyanov | c308c1b | 2007-11-01 00:33:50 -0700 | [diff] [blame] | 1027 | sk_prot_free(sk->sk_prot_creator, sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | } |
| 1029 | |
Denis V. Lunev | edf0208 | 2008-02-29 11:18:32 -0800 | [diff] [blame] | 1030 | /* |
| 1031 | * Last sock_put should drop referrence to sk->sk_net. It has already |
| 1032 | * been dropped in sk_change_net. Taking referrence to stopping namespace |
| 1033 | * is not an option. |
| 1034 | * Take referrence to a socket to remove it from hash _alive_ and after that |
| 1035 | * destroy it in the context of init_net. |
| 1036 | */ |
| 1037 | void sk_release_kernel(struct sock *sk) |
| 1038 | { |
| 1039 | if (sk == NULL || sk->sk_socket == NULL) |
| 1040 | return; |
| 1041 | |
| 1042 | sock_hold(sk); |
| 1043 | sock_release(sk->sk_socket); |
Denis V. Lunev | 65a18ec | 2008-04-16 01:59:46 -0700 | [diff] [blame] | 1044 | release_net(sock_net(sk)); |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1045 | sock_net_set(sk, get_net(&init_net)); |
Denis V. Lunev | edf0208 | 2008-02-29 11:18:32 -0800 | [diff] [blame] | 1046 | sock_put(sk); |
| 1047 | } |
David S. Miller | 45af175 | 2008-02-29 11:33:19 -0800 | [diff] [blame] | 1048 | EXPORT_SYMBOL(sk_release_kernel); |
Denis V. Lunev | edf0208 | 2008-02-29 11:18:32 -0800 | [diff] [blame] | 1049 | |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 1050 | struct sock *sk_clone(const struct sock *sk, const gfp_t priority) |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1051 | { |
Pavel Emelyanov | 8fd1d17 | 2007-11-01 00:37:32 -0700 | [diff] [blame] | 1052 | struct sock *newsk; |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1053 | |
Pavel Emelyanov | 8fd1d17 | 2007-11-01 00:37:32 -0700 | [diff] [blame] | 1054 | newsk = sk_prot_alloc(sk->sk_prot, priority, sk->sk_family); |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1055 | if (newsk != NULL) { |
| 1056 | struct sk_filter *filter; |
| 1057 | |
Venkat Yekkirala | 892c141 | 2006-08-04 23:08:56 -0700 | [diff] [blame] | 1058 | sock_copy(newsk, sk); |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1059 | |
| 1060 | /* SANITY */ |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 1061 | get_net(sock_net(newsk)); |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1062 | sk_node_init(&newsk->sk_node); |
| 1063 | sock_lock_init(newsk); |
| 1064 | bh_lock_sock(newsk); |
Eric Dumazet | fa438cc | 2007-03-04 16:05:44 -0800 | [diff] [blame] | 1065 | newsk->sk_backlog.head = newsk->sk_backlog.tail = NULL; |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1066 | |
| 1067 | atomic_set(&newsk->sk_rmem_alloc, 0); |
| 1068 | atomic_set(&newsk->sk_wmem_alloc, 0); |
| 1069 | atomic_set(&newsk->sk_omem_alloc, 0); |
| 1070 | skb_queue_head_init(&newsk->sk_receive_queue); |
| 1071 | skb_queue_head_init(&newsk->sk_write_queue); |
Chris Leech | 97fc2f0 | 2006-05-23 17:55:33 -0700 | [diff] [blame] | 1072 | #ifdef CONFIG_NET_DMA |
| 1073 | skb_queue_head_init(&newsk->sk_async_wait_queue); |
| 1074 | #endif |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1075 | |
| 1076 | rwlock_init(&newsk->sk_dst_lock); |
| 1077 | rwlock_init(&newsk->sk_callback_lock); |
Peter Zijlstra | 443aef0 | 2007-07-19 01:49:00 -0700 | [diff] [blame] | 1078 | lockdep_set_class_and_name(&newsk->sk_callback_lock, |
| 1079 | af_callback_keys + newsk->sk_family, |
| 1080 | af_family_clock_key_strings[newsk->sk_family]); |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1081 | |
| 1082 | newsk->sk_dst_cache = NULL; |
| 1083 | newsk->sk_wmem_queued = 0; |
| 1084 | newsk->sk_forward_alloc = 0; |
| 1085 | newsk->sk_send_head = NULL; |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1086 | newsk->sk_userlocks = sk->sk_userlocks & ~SOCK_BINDPORT_LOCK; |
| 1087 | |
| 1088 | sock_reset_flag(newsk, SOCK_DONE); |
| 1089 | skb_queue_head_init(&newsk->sk_error_queue); |
| 1090 | |
| 1091 | filter = newsk->sk_filter; |
| 1092 | if (filter != NULL) |
| 1093 | sk_filter_charge(newsk, filter); |
| 1094 | |
| 1095 | if (unlikely(xfrm_sk_clone_policy(newsk))) { |
| 1096 | /* It is still raw copy of parent, so invalidate |
| 1097 | * destructor and make plain sk_free() */ |
| 1098 | newsk->sk_destruct = NULL; |
| 1099 | sk_free(newsk); |
| 1100 | newsk = NULL; |
| 1101 | goto out; |
| 1102 | } |
| 1103 | |
| 1104 | newsk->sk_err = 0; |
| 1105 | newsk->sk_priority = 0; |
| 1106 | atomic_set(&newsk->sk_refcnt, 2); |
| 1107 | |
| 1108 | /* |
| 1109 | * Increment the counter in the same struct proto as the master |
| 1110 | * sock (sk_refcnt_debug_inc uses newsk->sk_prot->socks, that |
| 1111 | * is the same as sk->sk_prot->socks, as this field was copied |
| 1112 | * with memcpy). |
| 1113 | * |
| 1114 | * This _changes_ the previous behaviour, where |
| 1115 | * tcp_create_openreq_child always was incrementing the |
| 1116 | * equivalent to tcp_prot->socks (inet_sock_nr), so this have |
| 1117 | * to be taken into account in all callers. -acme |
| 1118 | */ |
| 1119 | sk_refcnt_debug_inc(newsk); |
David S. Miller | 972692e | 2008-06-17 22:41:38 -0700 | [diff] [blame] | 1120 | sk_set_socket(newsk, NULL); |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1121 | newsk->sk_sleep = NULL; |
| 1122 | |
| 1123 | if (newsk->sk_prot->sockets_allocated) |
Eric Dumazet | 1748376 | 2008-11-25 21:16:35 -0800 | [diff] [blame] | 1124 | percpu_counter_inc(newsk->sk_prot->sockets_allocated); |
Arnaldo Carvalho de Melo | 87d11ce | 2005-08-09 20:10:12 -0700 | [diff] [blame] | 1125 | } |
| 1126 | out: |
| 1127 | return newsk; |
| 1128 | } |
| 1129 | |
| 1130 | EXPORT_SYMBOL_GPL(sk_clone); |
| 1131 | |
Andi Kleen | 9958089 | 2007-04-20 17:12:43 -0700 | [diff] [blame] | 1132 | void sk_setup_caps(struct sock *sk, struct dst_entry *dst) |
| 1133 | { |
| 1134 | __sk_dst_set(sk, dst); |
| 1135 | sk->sk_route_caps = dst->dev->features; |
| 1136 | if (sk->sk_route_caps & NETIF_F_GSO) |
Herbert Xu | 4fcd6b9 | 2007-05-31 22:15:50 -0700 | [diff] [blame] | 1137 | sk->sk_route_caps |= NETIF_F_GSO_SOFTWARE; |
Andi Kleen | 9958089 | 2007-04-20 17:12:43 -0700 | [diff] [blame] | 1138 | if (sk_can_gso(sk)) { |
Peter P Waskiewicz Jr | 82cc1a7 | 2008-03-21 03:43:19 -0700 | [diff] [blame] | 1139 | if (dst->header_len) { |
Andi Kleen | 9958089 | 2007-04-20 17:12:43 -0700 | [diff] [blame] | 1140 | sk->sk_route_caps &= ~NETIF_F_GSO_MASK; |
Peter P Waskiewicz Jr | 82cc1a7 | 2008-03-21 03:43:19 -0700 | [diff] [blame] | 1141 | } else { |
Andi Kleen | 9958089 | 2007-04-20 17:12:43 -0700 | [diff] [blame] | 1142 | sk->sk_route_caps |= NETIF_F_SG | NETIF_F_HW_CSUM; |
Peter P Waskiewicz Jr | 82cc1a7 | 2008-03-21 03:43:19 -0700 | [diff] [blame] | 1143 | sk->sk_gso_max_size = dst->dev->gso_max_size; |
| 1144 | } |
Andi Kleen | 9958089 | 2007-04-20 17:12:43 -0700 | [diff] [blame] | 1145 | } |
| 1146 | } |
| 1147 | EXPORT_SYMBOL_GPL(sk_setup_caps); |
| 1148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | void __init sk_init(void) |
| 1150 | { |
| 1151 | if (num_physpages <= 4096) { |
| 1152 | sysctl_wmem_max = 32767; |
| 1153 | sysctl_rmem_max = 32767; |
| 1154 | sysctl_wmem_default = 32767; |
| 1155 | sysctl_rmem_default = 32767; |
| 1156 | } else if (num_physpages >= 131072) { |
| 1157 | sysctl_wmem_max = 131071; |
| 1158 | sysctl_rmem_max = 131071; |
| 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | /* |
| 1163 | * Simple resource managers for sockets. |
| 1164 | */ |
| 1165 | |
| 1166 | |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1167 | /* |
| 1168 | * Write buffer destructor automatically called from kfree_skb. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | */ |
| 1170 | void sock_wfree(struct sk_buff *skb) |
| 1171 | { |
| 1172 | struct sock *sk = skb->sk; |
| 1173 | |
| 1174 | /* In case it might be waiting for more memory. */ |
| 1175 | atomic_sub(skb->truesize, &sk->sk_wmem_alloc); |
| 1176 | if (!sock_flag(sk, SOCK_USE_WRITE_QUEUE)) |
| 1177 | sk->sk_write_space(sk); |
| 1178 | sock_put(sk); |
| 1179 | } |
| 1180 | |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1181 | /* |
| 1182 | * Read buffer destructor automatically called from kfree_skb. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | */ |
| 1184 | void sock_rfree(struct sk_buff *skb) |
| 1185 | { |
| 1186 | struct sock *sk = skb->sk; |
| 1187 | |
| 1188 | atomic_sub(skb->truesize, &sk->sk_rmem_alloc); |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 1189 | sk_mem_uncharge(skb->sk, skb->truesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | } |
| 1191 | |
| 1192 | |
| 1193 | int sock_i_uid(struct sock *sk) |
| 1194 | { |
| 1195 | int uid; |
| 1196 | |
| 1197 | read_lock(&sk->sk_callback_lock); |
| 1198 | uid = sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_uid : 0; |
| 1199 | read_unlock(&sk->sk_callback_lock); |
| 1200 | return uid; |
| 1201 | } |
| 1202 | |
| 1203 | unsigned long sock_i_ino(struct sock *sk) |
| 1204 | { |
| 1205 | unsigned long ino; |
| 1206 | |
| 1207 | read_lock(&sk->sk_callback_lock); |
| 1208 | ino = sk->sk_socket ? SOCK_INODE(sk->sk_socket)->i_ino : 0; |
| 1209 | read_unlock(&sk->sk_callback_lock); |
| 1210 | return ino; |
| 1211 | } |
| 1212 | |
| 1213 | /* |
| 1214 | * Allocate a skb from the socket's send buffer. |
| 1215 | */ |
Victor Fusco | 86a76ca | 2005-07-08 14:57:47 -0700 | [diff] [blame] | 1216 | struct sk_buff *sock_wmalloc(struct sock *sk, unsigned long size, int force, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 1217 | gfp_t priority) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | { |
| 1219 | if (force || atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) { |
| 1220 | struct sk_buff * skb = alloc_skb(size, priority); |
| 1221 | if (skb) { |
| 1222 | skb_set_owner_w(skb, sk); |
| 1223 | return skb; |
| 1224 | } |
| 1225 | } |
| 1226 | return NULL; |
| 1227 | } |
| 1228 | |
| 1229 | /* |
| 1230 | * Allocate a skb from the socket's receive buffer. |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1231 | */ |
Victor Fusco | 86a76ca | 2005-07-08 14:57:47 -0700 | [diff] [blame] | 1232 | struct sk_buff *sock_rmalloc(struct sock *sk, unsigned long size, int force, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 1233 | gfp_t priority) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | { |
| 1235 | if (force || atomic_read(&sk->sk_rmem_alloc) < sk->sk_rcvbuf) { |
| 1236 | struct sk_buff *skb = alloc_skb(size, priority); |
| 1237 | if (skb) { |
| 1238 | skb_set_owner_r(skb, sk); |
| 1239 | return skb; |
| 1240 | } |
| 1241 | } |
| 1242 | return NULL; |
| 1243 | } |
| 1244 | |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1245 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | * Allocate a memory block from the socket's option memory buffer. |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1247 | */ |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 1248 | void *sock_kmalloc(struct sock *sk, int size, gfp_t priority) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | { |
| 1250 | if ((unsigned)size <= sysctl_optmem_max && |
| 1251 | atomic_read(&sk->sk_omem_alloc) + size < sysctl_optmem_max) { |
| 1252 | void *mem; |
| 1253 | /* First do the add, to avoid the race if kmalloc |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1254 | * might sleep. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1255 | */ |
| 1256 | atomic_add(size, &sk->sk_omem_alloc); |
| 1257 | mem = kmalloc(size, priority); |
| 1258 | if (mem) |
| 1259 | return mem; |
| 1260 | atomic_sub(size, &sk->sk_omem_alloc); |
| 1261 | } |
| 1262 | return NULL; |
| 1263 | } |
| 1264 | |
| 1265 | /* |
| 1266 | * Free an option memory block. |
| 1267 | */ |
| 1268 | void sock_kfree_s(struct sock *sk, void *mem, int size) |
| 1269 | { |
| 1270 | kfree(mem); |
| 1271 | atomic_sub(size, &sk->sk_omem_alloc); |
| 1272 | } |
| 1273 | |
| 1274 | /* It is almost wait_for_tcp_memory minus release_sock/lock_sock. |
| 1275 | I think, these locks should be removed for datagram sockets. |
| 1276 | */ |
| 1277 | static long sock_wait_for_wmem(struct sock * sk, long timeo) |
| 1278 | { |
| 1279 | DEFINE_WAIT(wait); |
| 1280 | |
| 1281 | clear_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); |
| 1282 | for (;;) { |
| 1283 | if (!timeo) |
| 1284 | break; |
| 1285 | if (signal_pending(current)) |
| 1286 | break; |
| 1287 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 1288 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
| 1289 | if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) |
| 1290 | break; |
| 1291 | if (sk->sk_shutdown & SEND_SHUTDOWN) |
| 1292 | break; |
| 1293 | if (sk->sk_err) |
| 1294 | break; |
| 1295 | timeo = schedule_timeout(timeo); |
| 1296 | } |
| 1297 | finish_wait(sk->sk_sleep, &wait); |
| 1298 | return timeo; |
| 1299 | } |
| 1300 | |
| 1301 | |
| 1302 | /* |
| 1303 | * Generic send/receive buffer handlers |
| 1304 | */ |
| 1305 | |
Herbert Xu | 4cc7f68 | 2009-02-04 16:55:54 -0800 | [diff] [blame] | 1306 | struct sk_buff *sock_alloc_send_pskb(struct sock *sk, unsigned long header_len, |
| 1307 | unsigned long data_len, int noblock, |
| 1308 | int *errcode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1309 | { |
| 1310 | struct sk_buff *skb; |
Al Viro | 7d877f3 | 2005-10-21 03:20:43 -0400 | [diff] [blame] | 1311 | gfp_t gfp_mask; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | long timeo; |
| 1313 | int err; |
| 1314 | |
| 1315 | gfp_mask = sk->sk_allocation; |
| 1316 | if (gfp_mask & __GFP_WAIT) |
| 1317 | gfp_mask |= __GFP_REPEAT; |
| 1318 | |
| 1319 | timeo = sock_sndtimeo(sk, noblock); |
| 1320 | while (1) { |
| 1321 | err = sock_error(sk); |
| 1322 | if (err != 0) |
| 1323 | goto failure; |
| 1324 | |
| 1325 | err = -EPIPE; |
| 1326 | if (sk->sk_shutdown & SEND_SHUTDOWN) |
| 1327 | goto failure; |
| 1328 | |
| 1329 | if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf) { |
Larry Woodman | db38c179 | 2006-11-03 16:05:45 -0800 | [diff] [blame] | 1330 | skb = alloc_skb(header_len, gfp_mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1331 | if (skb) { |
| 1332 | int npages; |
| 1333 | int i; |
| 1334 | |
| 1335 | /* No pages, we're done... */ |
| 1336 | if (!data_len) |
| 1337 | break; |
| 1338 | |
| 1339 | npages = (data_len + (PAGE_SIZE - 1)) >> PAGE_SHIFT; |
| 1340 | skb->truesize += data_len; |
| 1341 | skb_shinfo(skb)->nr_frags = npages; |
| 1342 | for (i = 0; i < npages; i++) { |
| 1343 | struct page *page; |
| 1344 | skb_frag_t *frag; |
| 1345 | |
| 1346 | page = alloc_pages(sk->sk_allocation, 0); |
| 1347 | if (!page) { |
| 1348 | err = -ENOBUFS; |
| 1349 | skb_shinfo(skb)->nr_frags = i; |
| 1350 | kfree_skb(skb); |
| 1351 | goto failure; |
| 1352 | } |
| 1353 | |
| 1354 | frag = &skb_shinfo(skb)->frags[i]; |
| 1355 | frag->page = page; |
| 1356 | frag->page_offset = 0; |
| 1357 | frag->size = (data_len >= PAGE_SIZE ? |
| 1358 | PAGE_SIZE : |
| 1359 | data_len); |
| 1360 | data_len -= PAGE_SIZE; |
| 1361 | } |
| 1362 | |
| 1363 | /* Full success... */ |
| 1364 | break; |
| 1365 | } |
| 1366 | err = -ENOBUFS; |
| 1367 | goto failure; |
| 1368 | } |
| 1369 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); |
| 1370 | set_bit(SOCK_NOSPACE, &sk->sk_socket->flags); |
| 1371 | err = -EAGAIN; |
| 1372 | if (!timeo) |
| 1373 | goto failure; |
| 1374 | if (signal_pending(current)) |
| 1375 | goto interrupted; |
| 1376 | timeo = sock_wait_for_wmem(sk, timeo); |
| 1377 | } |
| 1378 | |
| 1379 | skb_set_owner_w(skb, sk); |
| 1380 | return skb; |
| 1381 | |
| 1382 | interrupted: |
| 1383 | err = sock_intr_errno(timeo); |
| 1384 | failure: |
| 1385 | *errcode = err; |
| 1386 | return NULL; |
| 1387 | } |
Herbert Xu | 4cc7f68 | 2009-02-04 16:55:54 -0800 | [diff] [blame] | 1388 | EXPORT_SYMBOL(sock_alloc_send_pskb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1390 | struct sk_buff *sock_alloc_send_skb(struct sock *sk, unsigned long size, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | int noblock, int *errcode) |
| 1392 | { |
| 1393 | return sock_alloc_send_pskb(sk, size, 0, noblock, errcode); |
| 1394 | } |
| 1395 | |
| 1396 | static void __lock_sock(struct sock *sk) |
| 1397 | { |
| 1398 | DEFINE_WAIT(wait); |
| 1399 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1400 | for (;;) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | prepare_to_wait_exclusive(&sk->sk_lock.wq, &wait, |
| 1402 | TASK_UNINTERRUPTIBLE); |
| 1403 | spin_unlock_bh(&sk->sk_lock.slock); |
| 1404 | schedule(); |
| 1405 | spin_lock_bh(&sk->sk_lock.slock); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1406 | if (!sock_owned_by_user(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | break; |
| 1408 | } |
| 1409 | finish_wait(&sk->sk_lock.wq, &wait); |
| 1410 | } |
| 1411 | |
| 1412 | static void __release_sock(struct sock *sk) |
| 1413 | { |
| 1414 | struct sk_buff *skb = sk->sk_backlog.head; |
| 1415 | |
| 1416 | do { |
| 1417 | sk->sk_backlog.head = sk->sk_backlog.tail = NULL; |
| 1418 | bh_unlock_sock(sk); |
| 1419 | |
| 1420 | do { |
| 1421 | struct sk_buff *next = skb->next; |
| 1422 | |
| 1423 | skb->next = NULL; |
Peter Zijlstra | c57943a | 2008-10-07 14:18:42 -0700 | [diff] [blame] | 1424 | sk_backlog_rcv(sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | |
| 1426 | /* |
| 1427 | * We are in process context here with softirqs |
| 1428 | * disabled, use cond_resched_softirq() to preempt. |
| 1429 | * This is safe to do because we've taken the backlog |
| 1430 | * queue private: |
| 1431 | */ |
| 1432 | cond_resched_softirq(); |
| 1433 | |
| 1434 | skb = next; |
| 1435 | } while (skb != NULL); |
| 1436 | |
| 1437 | bh_lock_sock(sk); |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1438 | } while ((skb = sk->sk_backlog.head) != NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | } |
| 1440 | |
| 1441 | /** |
| 1442 | * sk_wait_data - wait for data to arrive at sk_receive_queue |
Pavel Pisa | 4dc3b16 | 2005-05-01 08:59:25 -0700 | [diff] [blame] | 1443 | * @sk: sock to wait on |
| 1444 | * @timeo: for how long |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | * |
| 1446 | * Now socket state including sk->sk_err is changed only under lock, |
| 1447 | * hence we may omit checks after joining wait queue. |
| 1448 | * We check receive queue before schedule() only as optimization; |
| 1449 | * it is very likely that release_sock() added new data. |
| 1450 | */ |
| 1451 | int sk_wait_data(struct sock *sk, long *timeo) |
| 1452 | { |
| 1453 | int rc; |
| 1454 | DEFINE_WAIT(wait); |
| 1455 | |
| 1456 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); |
| 1457 | set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); |
| 1458 | rc = sk_wait_event(sk, timeo, !skb_queue_empty(&sk->sk_receive_queue)); |
| 1459 | clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags); |
| 1460 | finish_wait(sk->sk_sleep, &wait); |
| 1461 | return rc; |
| 1462 | } |
| 1463 | |
| 1464 | EXPORT_SYMBOL(sk_wait_data); |
| 1465 | |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 1466 | /** |
| 1467 | * __sk_mem_schedule - increase sk_forward_alloc and memory_allocated |
| 1468 | * @sk: socket |
| 1469 | * @size: memory size to allocate |
| 1470 | * @kind: allocation type |
| 1471 | * |
| 1472 | * If kind is SK_MEM_SEND, it means wmem allocation. Otherwise it means |
| 1473 | * rmem allocation. This function assumes that protocols which have |
| 1474 | * memory_pressure use sk_wmem_queued as write buffer accounting. |
| 1475 | */ |
| 1476 | int __sk_mem_schedule(struct sock *sk, int size, int kind) |
| 1477 | { |
| 1478 | struct proto *prot = sk->sk_prot; |
| 1479 | int amt = sk_mem_pages(size); |
| 1480 | int allocated; |
| 1481 | |
| 1482 | sk->sk_forward_alloc += amt * SK_MEM_QUANTUM; |
| 1483 | allocated = atomic_add_return(amt, prot->memory_allocated); |
| 1484 | |
| 1485 | /* Under limit. */ |
| 1486 | if (allocated <= prot->sysctl_mem[0]) { |
| 1487 | if (prot->memory_pressure && *prot->memory_pressure) |
| 1488 | *prot->memory_pressure = 0; |
| 1489 | return 1; |
| 1490 | } |
| 1491 | |
| 1492 | /* Under pressure. */ |
| 1493 | if (allocated > prot->sysctl_mem[1]) |
| 1494 | if (prot->enter_memory_pressure) |
Pavel Emelyanov | 5c52ba1 | 2008-07-16 20:28:10 -0700 | [diff] [blame] | 1495 | prot->enter_memory_pressure(sk); |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 1496 | |
| 1497 | /* Over hard limit. */ |
| 1498 | if (allocated > prot->sysctl_mem[2]) |
| 1499 | goto suppress_allocation; |
| 1500 | |
| 1501 | /* guarantee minimum buffer size under pressure */ |
| 1502 | if (kind == SK_MEM_RECV) { |
| 1503 | if (atomic_read(&sk->sk_rmem_alloc) < prot->sysctl_rmem[0]) |
| 1504 | return 1; |
| 1505 | } else { /* SK_MEM_SEND */ |
| 1506 | if (sk->sk_type == SOCK_STREAM) { |
| 1507 | if (sk->sk_wmem_queued < prot->sysctl_wmem[0]) |
| 1508 | return 1; |
| 1509 | } else if (atomic_read(&sk->sk_wmem_alloc) < |
| 1510 | prot->sysctl_wmem[0]) |
| 1511 | return 1; |
| 1512 | } |
| 1513 | |
| 1514 | if (prot->memory_pressure) { |
Eric Dumazet | 1748376 | 2008-11-25 21:16:35 -0800 | [diff] [blame] | 1515 | int alloc; |
| 1516 | |
| 1517 | if (!*prot->memory_pressure) |
| 1518 | return 1; |
| 1519 | alloc = percpu_counter_read_positive(prot->sockets_allocated); |
| 1520 | if (prot->sysctl_mem[2] > alloc * |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 1521 | sk_mem_pages(sk->sk_wmem_queued + |
| 1522 | atomic_read(&sk->sk_rmem_alloc) + |
| 1523 | sk->sk_forward_alloc)) |
| 1524 | return 1; |
| 1525 | } |
| 1526 | |
| 1527 | suppress_allocation: |
| 1528 | |
| 1529 | if (kind == SK_MEM_SEND && sk->sk_type == SOCK_STREAM) { |
| 1530 | sk_stream_moderate_sndbuf(sk); |
| 1531 | |
| 1532 | /* Fail only if socket is _under_ its sndbuf. |
| 1533 | * In this case we cannot block, so that we have to fail. |
| 1534 | */ |
| 1535 | if (sk->sk_wmem_queued + size >= sk->sk_sndbuf) |
| 1536 | return 1; |
| 1537 | } |
| 1538 | |
| 1539 | /* Alas. Undo changes. */ |
| 1540 | sk->sk_forward_alloc -= amt * SK_MEM_QUANTUM; |
| 1541 | atomic_sub(amt, prot->memory_allocated); |
| 1542 | return 0; |
| 1543 | } |
| 1544 | |
| 1545 | EXPORT_SYMBOL(__sk_mem_schedule); |
| 1546 | |
| 1547 | /** |
| 1548 | * __sk_reclaim - reclaim memory_allocated |
| 1549 | * @sk: socket |
| 1550 | */ |
| 1551 | void __sk_mem_reclaim(struct sock *sk) |
| 1552 | { |
| 1553 | struct proto *prot = sk->sk_prot; |
| 1554 | |
Eric Dumazet | 680a5a5 | 2007-12-31 15:00:50 -0800 | [diff] [blame] | 1555 | atomic_sub(sk->sk_forward_alloc >> SK_MEM_QUANTUM_SHIFT, |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 1556 | prot->memory_allocated); |
| 1557 | sk->sk_forward_alloc &= SK_MEM_QUANTUM - 1; |
| 1558 | |
| 1559 | if (prot->memory_pressure && *prot->memory_pressure && |
| 1560 | (atomic_read(prot->memory_allocated) < prot->sysctl_mem[0])) |
| 1561 | *prot->memory_pressure = 0; |
| 1562 | } |
| 1563 | |
| 1564 | EXPORT_SYMBOL(__sk_mem_reclaim); |
| 1565 | |
| 1566 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | /* |
| 1568 | * Set of default routines for initialising struct proto_ops when |
| 1569 | * the protocol does not support a particular function. In certain |
| 1570 | * cases where it makes no sense for a protocol to have a "do nothing" |
| 1571 | * function, some default processing is provided. |
| 1572 | */ |
| 1573 | |
| 1574 | int sock_no_bind(struct socket *sock, struct sockaddr *saddr, int len) |
| 1575 | { |
| 1576 | return -EOPNOTSUPP; |
| 1577 | } |
| 1578 | |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1579 | int sock_no_connect(struct socket *sock, struct sockaddr *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | int len, int flags) |
| 1581 | { |
| 1582 | return -EOPNOTSUPP; |
| 1583 | } |
| 1584 | |
| 1585 | int sock_no_socketpair(struct socket *sock1, struct socket *sock2) |
| 1586 | { |
| 1587 | return -EOPNOTSUPP; |
| 1588 | } |
| 1589 | |
| 1590 | int sock_no_accept(struct socket *sock, struct socket *newsock, int flags) |
| 1591 | { |
| 1592 | return -EOPNOTSUPP; |
| 1593 | } |
| 1594 | |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1595 | int sock_no_getname(struct socket *sock, struct sockaddr *saddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1596 | int *len, int peer) |
| 1597 | { |
| 1598 | return -EOPNOTSUPP; |
| 1599 | } |
| 1600 | |
| 1601 | unsigned int sock_no_poll(struct file * file, struct socket *sock, poll_table *pt) |
| 1602 | { |
| 1603 | return 0; |
| 1604 | } |
| 1605 | |
| 1606 | int sock_no_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 1607 | { |
| 1608 | return -EOPNOTSUPP; |
| 1609 | } |
| 1610 | |
| 1611 | int sock_no_listen(struct socket *sock, int backlog) |
| 1612 | { |
| 1613 | return -EOPNOTSUPP; |
| 1614 | } |
| 1615 | |
| 1616 | int sock_no_shutdown(struct socket *sock, int how) |
| 1617 | { |
| 1618 | return -EOPNOTSUPP; |
| 1619 | } |
| 1620 | |
| 1621 | int sock_no_setsockopt(struct socket *sock, int level, int optname, |
| 1622 | char __user *optval, int optlen) |
| 1623 | { |
| 1624 | return -EOPNOTSUPP; |
| 1625 | } |
| 1626 | |
| 1627 | int sock_no_getsockopt(struct socket *sock, int level, int optname, |
| 1628 | char __user *optval, int __user *optlen) |
| 1629 | { |
| 1630 | return -EOPNOTSUPP; |
| 1631 | } |
| 1632 | |
| 1633 | int sock_no_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, |
| 1634 | size_t len) |
| 1635 | { |
| 1636 | return -EOPNOTSUPP; |
| 1637 | } |
| 1638 | |
| 1639 | int sock_no_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, |
| 1640 | size_t len, int flags) |
| 1641 | { |
| 1642 | return -EOPNOTSUPP; |
| 1643 | } |
| 1644 | |
| 1645 | int sock_no_mmap(struct file *file, struct socket *sock, struct vm_area_struct *vma) |
| 1646 | { |
| 1647 | /* Mirror missing mmap method error code */ |
| 1648 | return -ENODEV; |
| 1649 | } |
| 1650 | |
| 1651 | ssize_t sock_no_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags) |
| 1652 | { |
| 1653 | ssize_t res; |
| 1654 | struct msghdr msg = {.msg_flags = flags}; |
| 1655 | struct kvec iov; |
| 1656 | char *kaddr = kmap(page); |
| 1657 | iov.iov_base = kaddr + offset; |
| 1658 | iov.iov_len = size; |
| 1659 | res = kernel_sendmsg(sock, &msg, &iov, 1, size); |
| 1660 | kunmap(page); |
| 1661 | return res; |
| 1662 | } |
| 1663 | |
| 1664 | /* |
| 1665 | * Default Socket Callbacks |
| 1666 | */ |
| 1667 | |
| 1668 | static void sock_def_wakeup(struct sock *sk) |
| 1669 | { |
| 1670 | read_lock(&sk->sk_callback_lock); |
| 1671 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
| 1672 | wake_up_interruptible_all(sk->sk_sleep); |
| 1673 | read_unlock(&sk->sk_callback_lock); |
| 1674 | } |
| 1675 | |
| 1676 | static void sock_def_error_report(struct sock *sk) |
| 1677 | { |
| 1678 | read_lock(&sk->sk_callback_lock); |
| 1679 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
Davide Libenzi | 37e5540 | 2009-03-31 15:24:21 -0700 | [diff] [blame^] | 1680 | wake_up_interruptible_poll(sk->sk_sleep, POLLERR); |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1681 | sk_wake_async(sk, SOCK_WAKE_IO, POLL_ERR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | read_unlock(&sk->sk_callback_lock); |
| 1683 | } |
| 1684 | |
| 1685 | static void sock_def_readable(struct sock *sk, int len) |
| 1686 | { |
| 1687 | read_lock(&sk->sk_callback_lock); |
| 1688 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
Davide Libenzi | 37e5540 | 2009-03-31 15:24:21 -0700 | [diff] [blame^] | 1689 | wake_up_interruptible_sync_poll(sk->sk_sleep, POLLIN | |
| 1690 | POLLRDNORM | POLLRDBAND); |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1691 | sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1692 | read_unlock(&sk->sk_callback_lock); |
| 1693 | } |
| 1694 | |
| 1695 | static void sock_def_write_space(struct sock *sk) |
| 1696 | { |
| 1697 | read_lock(&sk->sk_callback_lock); |
| 1698 | |
| 1699 | /* Do not wake up a writer until he can make "significant" |
| 1700 | * progress. --DaveM |
| 1701 | */ |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1702 | if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1703 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) |
Davide Libenzi | 37e5540 | 2009-03-31 15:24:21 -0700 | [diff] [blame^] | 1704 | wake_up_interruptible_sync_poll(sk->sk_sleep, POLLOUT | |
| 1705 | POLLWRNORM | POLLWRBAND); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1706 | |
| 1707 | /* Should agree with poll, otherwise some programs break */ |
| 1708 | if (sock_writeable(sk)) |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1709 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | } |
| 1711 | |
| 1712 | read_unlock(&sk->sk_callback_lock); |
| 1713 | } |
| 1714 | |
| 1715 | static void sock_def_destruct(struct sock *sk) |
| 1716 | { |
Jesper Juhl | a51482b | 2005-11-08 09:41:34 -0800 | [diff] [blame] | 1717 | kfree(sk->sk_protinfo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1718 | } |
| 1719 | |
| 1720 | void sk_send_sigurg(struct sock *sk) |
| 1721 | { |
| 1722 | if (sk->sk_socket && sk->sk_socket->file) |
| 1723 | if (send_sigurg(&sk->sk_socket->file->f_owner)) |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 1724 | sk_wake_async(sk, SOCK_WAKE_URG, POLL_PRI); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | } |
| 1726 | |
| 1727 | void sk_reset_timer(struct sock *sk, struct timer_list* timer, |
| 1728 | unsigned long expires) |
| 1729 | { |
| 1730 | if (!mod_timer(timer, expires)) |
| 1731 | sock_hold(sk); |
| 1732 | } |
| 1733 | |
| 1734 | EXPORT_SYMBOL(sk_reset_timer); |
| 1735 | |
| 1736 | void sk_stop_timer(struct sock *sk, struct timer_list* timer) |
| 1737 | { |
| 1738 | if (timer_pending(timer) && del_timer(timer)) |
| 1739 | __sock_put(sk); |
| 1740 | } |
| 1741 | |
| 1742 | EXPORT_SYMBOL(sk_stop_timer); |
| 1743 | |
| 1744 | void sock_init_data(struct socket *sock, struct sock *sk) |
| 1745 | { |
| 1746 | skb_queue_head_init(&sk->sk_receive_queue); |
| 1747 | skb_queue_head_init(&sk->sk_write_queue); |
| 1748 | skb_queue_head_init(&sk->sk_error_queue); |
Chris Leech | 97fc2f0 | 2006-05-23 17:55:33 -0700 | [diff] [blame] | 1749 | #ifdef CONFIG_NET_DMA |
| 1750 | skb_queue_head_init(&sk->sk_async_wait_queue); |
| 1751 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | |
| 1753 | sk->sk_send_head = NULL; |
| 1754 | |
| 1755 | init_timer(&sk->sk_timer); |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1757 | sk->sk_allocation = GFP_KERNEL; |
| 1758 | sk->sk_rcvbuf = sysctl_rmem_default; |
| 1759 | sk->sk_sndbuf = sysctl_wmem_default; |
| 1760 | sk->sk_state = TCP_CLOSE; |
David S. Miller | 972692e | 2008-06-17 22:41:38 -0700 | [diff] [blame] | 1761 | sk_set_socket(sk, sock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1762 | |
| 1763 | sock_set_flag(sk, SOCK_ZAPPED); |
| 1764 | |
Stephen Hemminger | e71a478 | 2007-04-10 20:10:33 -0700 | [diff] [blame] | 1765 | if (sock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | sk->sk_type = sock->type; |
| 1767 | sk->sk_sleep = &sock->wait; |
| 1768 | sock->sk = sk; |
| 1769 | } else |
| 1770 | sk->sk_sleep = NULL; |
| 1771 | |
| 1772 | rwlock_init(&sk->sk_dst_lock); |
| 1773 | rwlock_init(&sk->sk_callback_lock); |
Peter Zijlstra | 443aef0 | 2007-07-19 01:49:00 -0700 | [diff] [blame] | 1774 | lockdep_set_class_and_name(&sk->sk_callback_lock, |
| 1775 | af_callback_keys + sk->sk_family, |
| 1776 | af_family_clock_key_strings[sk->sk_family]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1777 | |
| 1778 | sk->sk_state_change = sock_def_wakeup; |
| 1779 | sk->sk_data_ready = sock_def_readable; |
| 1780 | sk->sk_write_space = sock_def_write_space; |
| 1781 | sk->sk_error_report = sock_def_error_report; |
| 1782 | sk->sk_destruct = sock_def_destruct; |
| 1783 | |
| 1784 | sk->sk_sndmsg_page = NULL; |
| 1785 | sk->sk_sndmsg_off = 0; |
| 1786 | |
| 1787 | sk->sk_peercred.pid = 0; |
| 1788 | sk->sk_peercred.uid = -1; |
| 1789 | sk->sk_peercred.gid = -1; |
| 1790 | sk->sk_write_pending = 0; |
| 1791 | sk->sk_rcvlowat = 1; |
| 1792 | sk->sk_rcvtimeo = MAX_SCHEDULE_TIMEOUT; |
| 1793 | sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT; |
| 1794 | |
Eric Dumazet | f37f0af | 2008-04-13 21:39:26 -0700 | [diff] [blame] | 1795 | sk->sk_stamp = ktime_set(-1L, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | |
| 1797 | atomic_set(&sk->sk_refcnt, 1); |
Wang Chen | 33c732c | 2007-11-13 20:30:01 -0800 | [diff] [blame] | 1798 | atomic_set(&sk->sk_drops, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | } |
| 1800 | |
Harvey Harrison | b5606c2 | 2008-02-13 15:03:16 -0800 | [diff] [blame] | 1801 | void lock_sock_nested(struct sock *sk, int subclass) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1802 | { |
| 1803 | might_sleep(); |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 1804 | spin_lock_bh(&sk->sk_lock.slock); |
John Heffner | d2e9117 | 2007-09-12 10:44:19 +0200 | [diff] [blame] | 1805 | if (sk->sk_lock.owned) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | __lock_sock(sk); |
John Heffner | d2e9117 | 2007-09-12 10:44:19 +0200 | [diff] [blame] | 1807 | sk->sk_lock.owned = 1; |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 1808 | spin_unlock(&sk->sk_lock.slock); |
| 1809 | /* |
| 1810 | * The sk_lock has mutex_lock() semantics here: |
| 1811 | */ |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1812 | mutex_acquire(&sk->sk_lock.dep_map, subclass, 0, _RET_IP_); |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 1813 | local_bh_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | } |
| 1815 | |
Peter Zijlstra | fcc70d5 | 2006-11-08 22:44:35 -0800 | [diff] [blame] | 1816 | EXPORT_SYMBOL(lock_sock_nested); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | |
Harvey Harrison | b5606c2 | 2008-02-13 15:03:16 -0800 | [diff] [blame] | 1818 | void release_sock(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | { |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 1820 | /* |
| 1821 | * The sk_lock has mutex_unlock() semantics: |
| 1822 | */ |
| 1823 | mutex_release(&sk->sk_lock.dep_map, 1, _RET_IP_); |
| 1824 | |
| 1825 | spin_lock_bh(&sk->sk_lock.slock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | if (sk->sk_backlog.tail) |
| 1827 | __release_sock(sk); |
John Heffner | d2e9117 | 2007-09-12 10:44:19 +0200 | [diff] [blame] | 1828 | sk->sk_lock.owned = 0; |
Ingo Molnar | a5b5bb9 | 2006-07-03 00:25:35 -0700 | [diff] [blame] | 1829 | if (waitqueue_active(&sk->sk_lock.wq)) |
| 1830 | wake_up(&sk->sk_lock.wq); |
| 1831 | spin_unlock_bh(&sk->sk_lock.slock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1832 | } |
| 1833 | EXPORT_SYMBOL(release_sock); |
| 1834 | |
| 1835 | int sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1836 | { |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 1837 | struct timeval tv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 1839 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 1840 | tv = ktime_to_timeval(sk->sk_stamp); |
| 1841 | if (tv.tv_sec == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | return -ENOENT; |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 1843 | if (tv.tv_sec == 0) { |
| 1844 | sk->sk_stamp = ktime_get_real(); |
| 1845 | tv = ktime_to_timeval(sk->sk_stamp); |
| 1846 | } |
| 1847 | return copy_to_user(userstamp, &tv, sizeof(tv)) ? -EFAULT : 0; |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1848 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1849 | EXPORT_SYMBOL(sock_get_timestamp); |
| 1850 | |
Eric Dumazet | ae40eb1 | 2007-03-18 17:33:16 -0700 | [diff] [blame] | 1851 | int sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) |
| 1852 | { |
| 1853 | struct timespec ts; |
| 1854 | if (!sock_flag(sk, SOCK_TIMESTAMP)) |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 1855 | sock_enable_timestamp(sk, SOCK_TIMESTAMP); |
Eric Dumazet | ae40eb1 | 2007-03-18 17:33:16 -0700 | [diff] [blame] | 1856 | ts = ktime_to_timespec(sk->sk_stamp); |
| 1857 | if (ts.tv_sec == -1) |
| 1858 | return -ENOENT; |
| 1859 | if (ts.tv_sec == 0) { |
| 1860 | sk->sk_stamp = ktime_get_real(); |
| 1861 | ts = ktime_to_timespec(sk->sk_stamp); |
| 1862 | } |
| 1863 | return copy_to_user(userstamp, &ts, sizeof(ts)) ? -EFAULT : 0; |
| 1864 | } |
| 1865 | EXPORT_SYMBOL(sock_get_timestampns); |
| 1866 | |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 1867 | void sock_enable_timestamp(struct sock *sk, int flag) |
YOSHIFUJI Hideaki | 4ec93ed | 2007-02-09 23:24:36 +0900 | [diff] [blame] | 1868 | { |
Patrick Ohly | 20d4947 | 2009-02-12 05:03:38 +0000 | [diff] [blame] | 1869 | if (!sock_flag(sk, flag)) { |
| 1870 | sock_set_flag(sk, flag); |
| 1871 | /* |
| 1872 | * we just set one of the two flags which require net |
| 1873 | * time stamping, but time stamping might have been on |
| 1874 | * already because of the other one |
| 1875 | */ |
| 1876 | if (!sock_flag(sk, |
| 1877 | flag == SOCK_TIMESTAMP ? |
| 1878 | SOCK_TIMESTAMPING_RX_SOFTWARE : |
| 1879 | SOCK_TIMESTAMP)) |
| 1880 | net_enable_timestamp(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | } |
| 1882 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | |
| 1884 | /* |
| 1885 | * Get a socket option on an socket. |
| 1886 | * |
| 1887 | * FIX: POSIX 1003.1g is very ambiguous here. It states that |
| 1888 | * asynchronous errors should be reported by getsockopt. We assume |
| 1889 | * this means if you specify SO_ERROR (otherwise whats the point of it). |
| 1890 | */ |
| 1891 | int sock_common_getsockopt(struct socket *sock, int level, int optname, |
| 1892 | char __user *optval, int __user *optlen) |
| 1893 | { |
| 1894 | struct sock *sk = sock->sk; |
| 1895 | |
| 1896 | return sk->sk_prot->getsockopt(sk, level, optname, optval, optlen); |
| 1897 | } |
| 1898 | |
| 1899 | EXPORT_SYMBOL(sock_common_getsockopt); |
| 1900 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1901 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1902 | int compat_sock_common_getsockopt(struct socket *sock, int level, int optname, |
| 1903 | char __user *optval, int __user *optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1904 | { |
| 1905 | struct sock *sk = sock->sk; |
| 1906 | |
Johannes Berg | 1e51f95 | 2007-03-06 13:44:06 -0800 | [diff] [blame] | 1907 | if (sk->sk_prot->compat_getsockopt != NULL) |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1908 | return sk->sk_prot->compat_getsockopt(sk, level, optname, |
| 1909 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1910 | return sk->sk_prot->getsockopt(sk, level, optname, optval, optlen); |
| 1911 | } |
| 1912 | EXPORT_SYMBOL(compat_sock_common_getsockopt); |
| 1913 | #endif |
| 1914 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1915 | int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock, |
| 1916 | struct msghdr *msg, size_t size, int flags) |
| 1917 | { |
| 1918 | struct sock *sk = sock->sk; |
| 1919 | int addr_len = 0; |
| 1920 | int err; |
| 1921 | |
| 1922 | err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT, |
| 1923 | flags & ~MSG_DONTWAIT, &addr_len); |
| 1924 | if (err >= 0) |
| 1925 | msg->msg_namelen = addr_len; |
| 1926 | return err; |
| 1927 | } |
| 1928 | |
| 1929 | EXPORT_SYMBOL(sock_common_recvmsg); |
| 1930 | |
| 1931 | /* |
| 1932 | * Set socket options on an inet socket. |
| 1933 | */ |
| 1934 | int sock_common_setsockopt(struct socket *sock, int level, int optname, |
| 1935 | char __user *optval, int optlen) |
| 1936 | { |
| 1937 | struct sock *sk = sock->sk; |
| 1938 | |
| 1939 | return sk->sk_prot->setsockopt(sk, level, optname, optval, optlen); |
| 1940 | } |
| 1941 | |
| 1942 | EXPORT_SYMBOL(sock_common_setsockopt); |
| 1943 | |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1944 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1945 | int compat_sock_common_setsockopt(struct socket *sock, int level, int optname, |
| 1946 | char __user *optval, int optlen) |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1947 | { |
| 1948 | struct sock *sk = sock->sk; |
| 1949 | |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 1950 | if (sk->sk_prot->compat_setsockopt != NULL) |
| 1951 | return sk->sk_prot->compat_setsockopt(sk, level, optname, |
| 1952 | optval, optlen); |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 1953 | return sk->sk_prot->setsockopt(sk, level, optname, optval, optlen); |
| 1954 | } |
| 1955 | EXPORT_SYMBOL(compat_sock_common_setsockopt); |
| 1956 | #endif |
| 1957 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | void sk_common_release(struct sock *sk) |
| 1959 | { |
| 1960 | if (sk->sk_prot->destroy) |
| 1961 | sk->sk_prot->destroy(sk); |
| 1962 | |
| 1963 | /* |
| 1964 | * Observation: when sock_common_release is called, processes have |
| 1965 | * no access to socket. But net still has. |
| 1966 | * Step one, detach it from networking: |
| 1967 | * |
| 1968 | * A. Remove from hash tables. |
| 1969 | */ |
| 1970 | |
| 1971 | sk->sk_prot->unhash(sk); |
| 1972 | |
| 1973 | /* |
| 1974 | * In this point socket cannot receive new packets, but it is possible |
| 1975 | * that some packets are in flight because some CPU runs receiver and |
| 1976 | * did hash table lookup before we unhashed socket. They will achieve |
| 1977 | * receive queue and will be purged by socket destructor. |
| 1978 | * |
| 1979 | * Also we still have packets pending on receive queue and probably, |
| 1980 | * our own packets waiting in device queues. sock_destroy will drain |
| 1981 | * receive queue, but transmitted packets will delay socket destruction |
| 1982 | * until the last reference will be released. |
| 1983 | */ |
| 1984 | |
| 1985 | sock_orphan(sk); |
| 1986 | |
| 1987 | xfrm_sk_free_policy(sk); |
| 1988 | |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 1989 | sk_refcnt_debug_release(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1990 | sock_put(sk); |
| 1991 | } |
| 1992 | |
| 1993 | EXPORT_SYMBOL(sk_common_release); |
| 1994 | |
| 1995 | static DEFINE_RWLOCK(proto_list_lock); |
| 1996 | static LIST_HEAD(proto_list); |
| 1997 | |
Pavel Emelyanov | 13ff3d6 | 2008-03-28 16:38:17 -0700 | [diff] [blame] | 1998 | #ifdef CONFIG_PROC_FS |
| 1999 | #define PROTO_INUSE_NR 64 /* should be enough for the first time */ |
Pavel Emelyanov | 1338d46 | 2008-03-28 16:38:43 -0700 | [diff] [blame] | 2000 | struct prot_inuse { |
| 2001 | int val[PROTO_INUSE_NR]; |
| 2002 | }; |
Pavel Emelyanov | 13ff3d6 | 2008-03-28 16:38:17 -0700 | [diff] [blame] | 2003 | |
| 2004 | static DECLARE_BITMAP(proto_inuse_idx, PROTO_INUSE_NR); |
Pavel Emelyanov | 70ee115 | 2008-03-31 19:42:16 -0700 | [diff] [blame] | 2005 | |
| 2006 | #ifdef CONFIG_NET_NS |
| 2007 | void sock_prot_inuse_add(struct net *net, struct proto *prot, int val) |
| 2008 | { |
| 2009 | int cpu = smp_processor_id(); |
| 2010 | per_cpu_ptr(net->core.inuse, cpu)->val[prot->inuse_idx] += val; |
| 2011 | } |
| 2012 | EXPORT_SYMBOL_GPL(sock_prot_inuse_add); |
| 2013 | |
| 2014 | int sock_prot_inuse_get(struct net *net, struct proto *prot) |
| 2015 | { |
| 2016 | int cpu, idx = prot->inuse_idx; |
| 2017 | int res = 0; |
| 2018 | |
| 2019 | for_each_possible_cpu(cpu) |
| 2020 | res += per_cpu_ptr(net->core.inuse, cpu)->val[idx]; |
| 2021 | |
| 2022 | return res >= 0 ? res : 0; |
| 2023 | } |
| 2024 | EXPORT_SYMBOL_GPL(sock_prot_inuse_get); |
| 2025 | |
| 2026 | static int sock_inuse_init_net(struct net *net) |
| 2027 | { |
| 2028 | net->core.inuse = alloc_percpu(struct prot_inuse); |
| 2029 | return net->core.inuse ? 0 : -ENOMEM; |
| 2030 | } |
| 2031 | |
| 2032 | static void sock_inuse_exit_net(struct net *net) |
| 2033 | { |
| 2034 | free_percpu(net->core.inuse); |
| 2035 | } |
| 2036 | |
| 2037 | static struct pernet_operations net_inuse_ops = { |
| 2038 | .init = sock_inuse_init_net, |
| 2039 | .exit = sock_inuse_exit_net, |
| 2040 | }; |
| 2041 | |
| 2042 | static __init int net_inuse_init(void) |
| 2043 | { |
| 2044 | if (register_pernet_subsys(&net_inuse_ops)) |
| 2045 | panic("Cannot initialize net inuse counters"); |
| 2046 | |
| 2047 | return 0; |
| 2048 | } |
| 2049 | |
| 2050 | core_initcall(net_inuse_init); |
| 2051 | #else |
Pavel Emelyanov | 1338d46 | 2008-03-28 16:38:43 -0700 | [diff] [blame] | 2052 | static DEFINE_PER_CPU(struct prot_inuse, prot_inuse); |
| 2053 | |
Pavel Emelyanov | c29a0bc | 2008-03-31 19:41:46 -0700 | [diff] [blame] | 2054 | void sock_prot_inuse_add(struct net *net, struct proto *prot, int val) |
Pavel Emelyanov | 1338d46 | 2008-03-28 16:38:43 -0700 | [diff] [blame] | 2055 | { |
| 2056 | __get_cpu_var(prot_inuse).val[prot->inuse_idx] += val; |
| 2057 | } |
| 2058 | EXPORT_SYMBOL_GPL(sock_prot_inuse_add); |
| 2059 | |
Pavel Emelyanov | c29a0bc | 2008-03-31 19:41:46 -0700 | [diff] [blame] | 2060 | int sock_prot_inuse_get(struct net *net, struct proto *prot) |
Pavel Emelyanov | 1338d46 | 2008-03-28 16:38:43 -0700 | [diff] [blame] | 2061 | { |
| 2062 | int cpu, idx = prot->inuse_idx; |
| 2063 | int res = 0; |
| 2064 | |
| 2065 | for_each_possible_cpu(cpu) |
| 2066 | res += per_cpu(prot_inuse, cpu).val[idx]; |
| 2067 | |
| 2068 | return res >= 0 ? res : 0; |
| 2069 | } |
| 2070 | EXPORT_SYMBOL_GPL(sock_prot_inuse_get); |
Pavel Emelyanov | 70ee115 | 2008-03-31 19:42:16 -0700 | [diff] [blame] | 2071 | #endif |
Pavel Emelyanov | 13ff3d6 | 2008-03-28 16:38:17 -0700 | [diff] [blame] | 2072 | |
| 2073 | static void assign_proto_idx(struct proto *prot) |
| 2074 | { |
| 2075 | prot->inuse_idx = find_first_zero_bit(proto_inuse_idx, PROTO_INUSE_NR); |
| 2076 | |
| 2077 | if (unlikely(prot->inuse_idx == PROTO_INUSE_NR - 1)) { |
| 2078 | printk(KERN_ERR "PROTO_INUSE_NR exhausted\n"); |
| 2079 | return; |
| 2080 | } |
| 2081 | |
| 2082 | set_bit(prot->inuse_idx, proto_inuse_idx); |
| 2083 | } |
| 2084 | |
| 2085 | static void release_proto_idx(struct proto *prot) |
| 2086 | { |
| 2087 | if (prot->inuse_idx != PROTO_INUSE_NR - 1) |
| 2088 | clear_bit(prot->inuse_idx, proto_inuse_idx); |
| 2089 | } |
| 2090 | #else |
| 2091 | static inline void assign_proto_idx(struct proto *prot) |
| 2092 | { |
| 2093 | } |
| 2094 | |
| 2095 | static inline void release_proto_idx(struct proto *prot) |
| 2096 | { |
| 2097 | } |
| 2098 | #endif |
| 2099 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | int proto_register(struct proto *prot, int alloc_slab) |
| 2101 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2102 | if (alloc_slab) { |
| 2103 | prot->slab = kmem_cache_create(prot->name, prot->obj_size, 0, |
Eric Dumazet | 271b72c | 2008-10-29 02:11:14 -0700 | [diff] [blame] | 2104 | SLAB_HWCACHE_ALIGN | prot->slab_flags, |
| 2105 | NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | |
| 2107 | if (prot->slab == NULL) { |
| 2108 | printk(KERN_CRIT "%s: Can't create sock SLAB cache!\n", |
| 2109 | prot->name); |
Pavel Emelyanov | 60e7663 | 2008-03-28 16:39:10 -0700 | [diff] [blame] | 2110 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2111 | } |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2112 | |
| 2113 | if (prot->rsk_prot != NULL) { |
| 2114 | static const char mask[] = "request_sock_%s"; |
| 2115 | |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2116 | prot->rsk_prot->slab_name = kmalloc(strlen(prot->name) + sizeof(mask) - 1, GFP_KERNEL); |
| 2117 | if (prot->rsk_prot->slab_name == NULL) |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2118 | goto out_free_sock_slab; |
| 2119 | |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2120 | sprintf(prot->rsk_prot->slab_name, mask, prot->name); |
| 2121 | prot->rsk_prot->slab = kmem_cache_create(prot->rsk_prot->slab_name, |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2122 | prot->rsk_prot->obj_size, 0, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 2123 | SLAB_HWCACHE_ALIGN, NULL); |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2124 | |
| 2125 | if (prot->rsk_prot->slab == NULL) { |
| 2126 | printk(KERN_CRIT "%s: Can't create request sock SLAB cache!\n", |
| 2127 | prot->name); |
| 2128 | goto out_free_request_sock_slab_name; |
| 2129 | } |
| 2130 | } |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 2131 | |
Arnaldo Carvalho de Melo | 6d6ee43 | 2005-12-13 23:25:19 -0800 | [diff] [blame] | 2132 | if (prot->twsk_prot != NULL) { |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 2133 | static const char mask[] = "tw_sock_%s"; |
| 2134 | |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2135 | prot->twsk_prot->twsk_slab_name = kmalloc(strlen(prot->name) + sizeof(mask) - 1, GFP_KERNEL); |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 2136 | |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2137 | if (prot->twsk_prot->twsk_slab_name == NULL) |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 2138 | goto out_free_request_sock_slab; |
| 2139 | |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2140 | sprintf(prot->twsk_prot->twsk_slab_name, mask, prot->name); |
Arnaldo Carvalho de Melo | 6d6ee43 | 2005-12-13 23:25:19 -0800 | [diff] [blame] | 2141 | prot->twsk_prot->twsk_slab = |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2142 | kmem_cache_create(prot->twsk_prot->twsk_slab_name, |
Arnaldo Carvalho de Melo | 6d6ee43 | 2005-12-13 23:25:19 -0800 | [diff] [blame] | 2143 | prot->twsk_prot->twsk_obj_size, |
Eric Dumazet | 3ab5aee | 2008-11-16 19:40:17 -0800 | [diff] [blame] | 2144 | 0, |
| 2145 | SLAB_HWCACHE_ALIGN | |
| 2146 | prot->slab_flags, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 2147 | NULL); |
Arnaldo Carvalho de Melo | 6d6ee43 | 2005-12-13 23:25:19 -0800 | [diff] [blame] | 2148 | if (prot->twsk_prot->twsk_slab == NULL) |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 2149 | goto out_free_timewait_sock_slab_name; |
| 2150 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2151 | } |
| 2152 | |
Arnaldo Carvalho de Melo | 2a27805 | 2005-04-16 15:24:09 -0700 | [diff] [blame] | 2153 | write_lock(&proto_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | list_add(&prot->node, &proto_list); |
Pavel Emelyanov | 13ff3d6 | 2008-03-28 16:38:17 -0700 | [diff] [blame] | 2155 | assign_proto_idx(prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | write_unlock(&proto_list_lock); |
Pavel Emelyanov | b733c00 | 2007-11-07 02:23:38 -0800 | [diff] [blame] | 2157 | return 0; |
| 2158 | |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 2159 | out_free_timewait_sock_slab_name: |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2160 | kfree(prot->twsk_prot->twsk_slab_name); |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 2161 | out_free_request_sock_slab: |
| 2162 | if (prot->rsk_prot && prot->rsk_prot->slab) { |
| 2163 | kmem_cache_destroy(prot->rsk_prot->slab); |
| 2164 | prot->rsk_prot->slab = NULL; |
| 2165 | } |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2166 | out_free_request_sock_slab_name: |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2167 | kfree(prot->rsk_prot->slab_name); |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2168 | out_free_sock_slab: |
| 2169 | kmem_cache_destroy(prot->slab); |
| 2170 | prot->slab = NULL; |
Pavel Emelyanov | b733c00 | 2007-11-07 02:23:38 -0800 | [diff] [blame] | 2171 | out: |
| 2172 | return -ENOBUFS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | } |
| 2174 | |
| 2175 | EXPORT_SYMBOL(proto_register); |
| 2176 | |
| 2177 | void proto_unregister(struct proto *prot) |
| 2178 | { |
| 2179 | write_lock(&proto_list_lock); |
Pavel Emelyanov | 13ff3d6 | 2008-03-28 16:38:17 -0700 | [diff] [blame] | 2180 | release_proto_idx(prot); |
Patrick McHardy | 0a3f435 | 2005-09-06 19:47:50 -0700 | [diff] [blame] | 2181 | list_del(&prot->node); |
| 2182 | write_unlock(&proto_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2183 | |
| 2184 | if (prot->slab != NULL) { |
| 2185 | kmem_cache_destroy(prot->slab); |
| 2186 | prot->slab = NULL; |
| 2187 | } |
| 2188 | |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2189 | if (prot->rsk_prot != NULL && prot->rsk_prot->slab != NULL) { |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2190 | kmem_cache_destroy(prot->rsk_prot->slab); |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2191 | kfree(prot->rsk_prot->slab_name); |
Arnaldo Carvalho de Melo | 2e6599c | 2005-06-18 22:46:52 -0700 | [diff] [blame] | 2192 | prot->rsk_prot->slab = NULL; |
| 2193 | } |
| 2194 | |
Arnaldo Carvalho de Melo | 6d6ee43 | 2005-12-13 23:25:19 -0800 | [diff] [blame] | 2195 | if (prot->twsk_prot != NULL && prot->twsk_prot->twsk_slab != NULL) { |
Arnaldo Carvalho de Melo | 6d6ee43 | 2005-12-13 23:25:19 -0800 | [diff] [blame] | 2196 | kmem_cache_destroy(prot->twsk_prot->twsk_slab); |
Catalin Marinas | 7e56b5d | 2008-11-21 16:45:22 -0800 | [diff] [blame] | 2197 | kfree(prot->twsk_prot->twsk_slab_name); |
Arnaldo Carvalho de Melo | 6d6ee43 | 2005-12-13 23:25:19 -0800 | [diff] [blame] | 2198 | prot->twsk_prot->twsk_slab = NULL; |
Arnaldo Carvalho de Melo | 8feaf0c | 2005-08-09 20:09:30 -0700 | [diff] [blame] | 2199 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2200 | } |
| 2201 | |
| 2202 | EXPORT_SYMBOL(proto_unregister); |
| 2203 | |
| 2204 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | static void *proto_seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | 9a429c4 | 2008-01-01 21:58:02 -0800 | [diff] [blame] | 2206 | __acquires(proto_list_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2207 | { |
| 2208 | read_lock(&proto_list_lock); |
Pavel Emelianov | 60f0438 | 2007-07-09 13:15:14 -0700 | [diff] [blame] | 2209 | return seq_list_start_head(&proto_list, *pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2210 | } |
| 2211 | |
| 2212 | static void *proto_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| 2213 | { |
Pavel Emelianov | 60f0438 | 2007-07-09 13:15:14 -0700 | [diff] [blame] | 2214 | return seq_list_next(v, &proto_list, pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | } |
| 2216 | |
| 2217 | static void proto_seq_stop(struct seq_file *seq, void *v) |
Eric Dumazet | 9a429c4 | 2008-01-01 21:58:02 -0800 | [diff] [blame] | 2218 | __releases(proto_list_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2219 | { |
| 2220 | read_unlock(&proto_list_lock); |
| 2221 | } |
| 2222 | |
| 2223 | static char proto_method_implemented(const void *method) |
| 2224 | { |
| 2225 | return method == NULL ? 'n' : 'y'; |
| 2226 | } |
| 2227 | |
| 2228 | static void proto_seq_printf(struct seq_file *seq, struct proto *proto) |
| 2229 | { |
| 2230 | seq_printf(seq, "%-9s %4u %6d %6d %-3s %6u %-3s %-10s " |
| 2231 | "%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n", |
| 2232 | proto->name, |
| 2233 | proto->obj_size, |
Eric Dumazet | 14e943d | 2008-11-19 15:14:01 -0800 | [diff] [blame] | 2234 | sock_prot_inuse_get(seq_file_net(seq), proto), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2235 | proto->memory_allocated != NULL ? atomic_read(proto->memory_allocated) : -1, |
| 2236 | proto->memory_pressure != NULL ? *proto->memory_pressure ? "yes" : "no" : "NI", |
| 2237 | proto->max_header, |
| 2238 | proto->slab == NULL ? "no" : "yes", |
| 2239 | module_name(proto->owner), |
| 2240 | proto_method_implemented(proto->close), |
| 2241 | proto_method_implemented(proto->connect), |
| 2242 | proto_method_implemented(proto->disconnect), |
| 2243 | proto_method_implemented(proto->accept), |
| 2244 | proto_method_implemented(proto->ioctl), |
| 2245 | proto_method_implemented(proto->init), |
| 2246 | proto_method_implemented(proto->destroy), |
| 2247 | proto_method_implemented(proto->shutdown), |
| 2248 | proto_method_implemented(proto->setsockopt), |
| 2249 | proto_method_implemented(proto->getsockopt), |
| 2250 | proto_method_implemented(proto->sendmsg), |
| 2251 | proto_method_implemented(proto->recvmsg), |
| 2252 | proto_method_implemented(proto->sendpage), |
| 2253 | proto_method_implemented(proto->bind), |
| 2254 | proto_method_implemented(proto->backlog_rcv), |
| 2255 | proto_method_implemented(proto->hash), |
| 2256 | proto_method_implemented(proto->unhash), |
| 2257 | proto_method_implemented(proto->get_port), |
| 2258 | proto_method_implemented(proto->enter_memory_pressure)); |
| 2259 | } |
| 2260 | |
| 2261 | static int proto_seq_show(struct seq_file *seq, void *v) |
| 2262 | { |
Pavel Emelianov | 60f0438 | 2007-07-09 13:15:14 -0700 | [diff] [blame] | 2263 | if (v == &proto_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2264 | seq_printf(seq, "%-9s %-4s %-8s %-6s %-5s %-7s %-4s %-10s %s", |
| 2265 | "protocol", |
| 2266 | "size", |
| 2267 | "sockets", |
| 2268 | "memory", |
| 2269 | "press", |
| 2270 | "maxhdr", |
| 2271 | "slab", |
| 2272 | "module", |
| 2273 | "cl co di ac io in de sh ss gs se re sp bi br ha uh gp em\n"); |
| 2274 | else |
Pavel Emelianov | 60f0438 | 2007-07-09 13:15:14 -0700 | [diff] [blame] | 2275 | proto_seq_printf(seq, list_entry(v, struct proto, node)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2276 | return 0; |
| 2277 | } |
| 2278 | |
Stephen Hemminger | f690808 | 2007-03-12 14:34:29 -0700 | [diff] [blame] | 2279 | static const struct seq_operations proto_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2280 | .start = proto_seq_start, |
| 2281 | .next = proto_seq_next, |
| 2282 | .stop = proto_seq_stop, |
| 2283 | .show = proto_seq_show, |
| 2284 | }; |
| 2285 | |
| 2286 | static int proto_seq_open(struct inode *inode, struct file *file) |
| 2287 | { |
Eric Dumazet | 14e943d | 2008-11-19 15:14:01 -0800 | [diff] [blame] | 2288 | return seq_open_net(inode, file, &proto_seq_ops, |
| 2289 | sizeof(struct seq_net_private)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2290 | } |
| 2291 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 2292 | static const struct file_operations proto_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2293 | .owner = THIS_MODULE, |
| 2294 | .open = proto_seq_open, |
| 2295 | .read = seq_read, |
| 2296 | .llseek = seq_lseek, |
Eric Dumazet | 14e943d | 2008-11-19 15:14:01 -0800 | [diff] [blame] | 2297 | .release = seq_release_net, |
| 2298 | }; |
| 2299 | |
| 2300 | static __net_init int proto_init_net(struct net *net) |
| 2301 | { |
| 2302 | if (!proc_net_fops_create(net, "protocols", S_IRUGO, &proto_seq_fops)) |
| 2303 | return -ENOMEM; |
| 2304 | |
| 2305 | return 0; |
| 2306 | } |
| 2307 | |
| 2308 | static __net_exit void proto_exit_net(struct net *net) |
| 2309 | { |
| 2310 | proc_net_remove(net, "protocols"); |
| 2311 | } |
| 2312 | |
| 2313 | |
| 2314 | static __net_initdata struct pernet_operations proto_net_ops = { |
| 2315 | .init = proto_init_net, |
| 2316 | .exit = proto_exit_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2317 | }; |
| 2318 | |
| 2319 | static int __init proto_init(void) |
| 2320 | { |
Eric Dumazet | 14e943d | 2008-11-19 15:14:01 -0800 | [diff] [blame] | 2321 | return register_pernet_subsys(&proto_net_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2322 | } |
| 2323 | |
| 2324 | subsys_initcall(proto_init); |
| 2325 | |
| 2326 | #endif /* PROC_FS */ |
| 2327 | |
| 2328 | EXPORT_SYMBOL(sk_alloc); |
| 2329 | EXPORT_SYMBOL(sk_free); |
| 2330 | EXPORT_SYMBOL(sk_send_sigurg); |
| 2331 | EXPORT_SYMBOL(sock_alloc_send_skb); |
| 2332 | EXPORT_SYMBOL(sock_init_data); |
| 2333 | EXPORT_SYMBOL(sock_kfree_s); |
| 2334 | EXPORT_SYMBOL(sock_kmalloc); |
| 2335 | EXPORT_SYMBOL(sock_no_accept); |
| 2336 | EXPORT_SYMBOL(sock_no_bind); |
| 2337 | EXPORT_SYMBOL(sock_no_connect); |
| 2338 | EXPORT_SYMBOL(sock_no_getname); |
| 2339 | EXPORT_SYMBOL(sock_no_getsockopt); |
| 2340 | EXPORT_SYMBOL(sock_no_ioctl); |
| 2341 | EXPORT_SYMBOL(sock_no_listen); |
| 2342 | EXPORT_SYMBOL(sock_no_mmap); |
| 2343 | EXPORT_SYMBOL(sock_no_poll); |
| 2344 | EXPORT_SYMBOL(sock_no_recvmsg); |
| 2345 | EXPORT_SYMBOL(sock_no_sendmsg); |
| 2346 | EXPORT_SYMBOL(sock_no_sendpage); |
| 2347 | EXPORT_SYMBOL(sock_no_setsockopt); |
| 2348 | EXPORT_SYMBOL(sock_no_shutdown); |
| 2349 | EXPORT_SYMBOL(sock_no_socketpair); |
| 2350 | EXPORT_SYMBOL(sock_rfree); |
| 2351 | EXPORT_SYMBOL(sock_setsockopt); |
| 2352 | EXPORT_SYMBOL(sock_wfree); |
| 2353 | EXPORT_SYMBOL(sock_wmalloc); |
| 2354 | EXPORT_SYMBOL(sock_i_uid); |
| 2355 | EXPORT_SYMBOL(sock_i_ino); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2356 | EXPORT_SYMBOL(sysctl_optmem_max); |