inet_timewait_sock.h revision f943cbe6fb71d1389dd8684b9b4181e49f8e870c
18feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo/* 28feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * INET An implementation of the TCP/IP protocol suite for the LINUX 38feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * operating system. INET is implemented using the BSD Socket 48feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * interface as the means of communication with the user level. 58feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * 68feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * Definitions for a generic INET TIMEWAIT sock 78feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * 88feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * From code originally in net/tcp.h 98feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * 108feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * This program is free software; you can redistribute it and/or 118feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * modify it under the terms of the GNU General Public License 128feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * as published by the Free Software Foundation; either version 138feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * 2 of the License, or (at your option) any later version. 148feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo */ 158feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#ifndef _INET_TIMEWAIT_SOCK_ 168feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define _INET_TIMEWAIT_SOCK_ 178feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 188feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 199e337b0fb3baa3c22490365b1bdee6f4741413d4Vegard Nossum#include <linux/kmemcheck.h> 208feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#include <linux/list.h> 21295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#include <linux/timer.h> 228feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#include <linux/types.h> 23295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#include <linux/workqueue.h> 248feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 2514c850212ed8f8cbb5972ad6b8812e08a0bc901cArnaldo Carvalho de Melo#include <net/inet_sock.h> 268feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#include <net/sock.h> 278feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#include <net/tcp_states.h> 286d6ee43e0b8b8d4847627fd43739b98ec2b9404fArnaldo Carvalho de Melo#include <net/timewait_sock.h> 298feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 3060063497a95e716c9a689af3be2687d261f115b4Arun Sharma#include <linux/atomic.h> 318feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 32295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melostruct inet_hashinfo; 33295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo 34295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#define INET_TWDR_RECYCLE_SLOTS_LOG 5 35295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#define INET_TWDR_RECYCLE_SLOTS (1 << INET_TWDR_RECYCLE_SLOTS_LOG) 36295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo 37295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo/* 38295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo * If time > 4sec, it is "slow" path, no recycling is required, 39295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo * so that we select tick to get range about 4 seconds. 40295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo */ 41295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#if HZ <= 16 || HZ > 4096 42295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# error Unsupported: HZ <= 16 or HZ > 4096 43295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#elif HZ <= 32 44295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# define INET_TWDR_RECYCLE_TICK (5 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) 45295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#elif HZ <= 64 46295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# define INET_TWDR_RECYCLE_TICK (6 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) 47295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#elif HZ <= 128 48295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# define INET_TWDR_RECYCLE_TICK (7 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) 49295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#elif HZ <= 256 50295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# define INET_TWDR_RECYCLE_TICK (8 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) 51295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#elif HZ <= 512 52295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# define INET_TWDR_RECYCLE_TICK (9 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) 53295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#elif HZ <= 1024 54295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# define INET_TWDR_RECYCLE_TICK (10 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) 55295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#elif HZ <= 2048 56295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# define INET_TWDR_RECYCLE_TICK (11 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) 57295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#else 58295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo# define INET_TWDR_RECYCLE_TICK (12 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) 59295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#endif 60295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo 61295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo/* TIME_WAIT reaping mechanism. */ 62295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#define INET_TWDR_TWKILL_SLOTS 8 /* Please keep this a power of 2. */ 63295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo 64295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo#define INET_TWDR_TWKILL_QUOTA 100 65295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo 66295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melostruct inet_timewait_death_row { 67295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo /* Short-time timewait calendar */ 68295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo int twcal_hand; 69187f5f84ef14a07dccf5f4503099708d60f6a724Eric Dumazet unsigned long twcal_jiffie; 70295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo struct timer_list twcal_timer; 71295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo struct hlist_head twcal_row[INET_TWDR_RECYCLE_SLOTS]; 72295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo 73295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo spinlock_t death_lock; 74295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo int tw_count; 75295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo int period; 76295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo u32 thread_slots; 77295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo struct work_struct twkill_work; 78295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo struct timer_list tw_timer; 79295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo int slot; 80295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo struct hlist_head cells[INET_TWDR_TWKILL_SLOTS]; 81295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo struct inet_hashinfo *hashinfo; 82295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo int sysctl_tw_recycle; 83295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo int sysctl_max_tw_buckets; 84295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo}; 85295ff7edb8f72b77d524759266f7524deae379b3Arnaldo Carvalho de Melo 86696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Meloextern void inet_twdr_hangman(unsigned long data); 8765f27f38446e1976cc98fd3004b110fedcddd189David Howellsextern void inet_twdr_twkill_work(struct work_struct *work); 88696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Meloextern void inet_twdr_twcal_tick(unsigned long data); 89696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Melo 908feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melostruct inet_bind_bucket; 918feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 928feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo/* 938feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * This is a TIME_WAIT sock. It works around the memory consumption 948feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * problems of sockets in such a state on heavily loaded servers, but 958feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * without violating the protocol specification. 968feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo */ 978feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melostruct inet_timewait_sock { 988feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo /* 998feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * Now struct sock also uses sock_common, so please just 1008feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo * don't add nothing before this first member (__tw_common) --acme 1018feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo */ 1028feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo struct sock_common __tw_common; 1038feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define tw_family __tw_common.skc_family 1048feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define tw_state __tw_common.skc_state 1058feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define tw_reuse __tw_common.skc_reuse 1068feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define tw_bound_dev_if __tw_common.skc_bound_dev_if 1073ab5aee7fe840b5b1b35a8d1ac11c3de5281e611Eric Dumazet#define tw_node __tw_common.skc_nulls_node 1088feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define tw_bind_node __tw_common.skc_bind_node 1098feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define tw_refcnt __tw_common.skc_refcnt 11081c3d5470ecc70564eb9209946730fe2be93ad06Eric Dumazet#define tw_hash __tw_common.skc_hash 1118feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define tw_prot __tw_common.skc_prot 11207feaebfcc10cd35e745c7073667935246494beeEric W. Biederman#define tw_net __tw_common.skc_net 11368835aba4d9b74e2f94106d13b6a4bddc447c4c8Eric Dumazet#define tw_daddr __tw_common.skc_daddr 11468835aba4d9b74e2f94106d13b6a4bddc447c4c8Eric Dumazet#define tw_rcv_saddr __tw_common.skc_rcv_saddr 115ad8bb78083ff58f5dff3ef8cf8ac3e0336f8ae36Arnaldo Carvalho de Melo int tw_timeout; 1168feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo volatile unsigned char tw_substate; 1178feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo unsigned char tw_rcv_wscale; 11868835aba4d9b74e2f94106d13b6a4bddc447c4c8Eric Dumazet 1198feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo /* Socket demultiplex comparisons on incoming packets. */ 12068835aba4d9b74e2f94106d13b6a4bddc447c4c8Eric Dumazet /* these three are in inet_sock */ 12123f33c2d4fd5986243b67a2bf5e63ebae1a76ffaAl Viro __be16 tw_sport; 12223f33c2d4fd5986243b67a2bf5e63ebae1a76ffaAl Viro __be16 tw_dport; 1238feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo __u16 tw_num; 1249e337b0fb3baa3c22490365b1bdee6f4741413d4Vegard Nossum kmemcheck_bitfield_begin(flags); 1258feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo /* And these are ours. */ 126abf90cca9725bd05362fb3443ad55071a69a12d9Eric Dumazet unsigned int tw_ipv6only : 1, 127abf90cca9725bd05362fb3443ad55071a69a12d9Eric Dumazet tw_transparent : 1, 12866b13d99d96a1a69f47a6bc3dc47f45955967377Eric Dumazet tw_pad : 6, /* 6 bits hole */ 12966b13d99d96a1a69f47a6bc3dc47f45955967377Eric Dumazet tw_tos : 8, 130abf90cca9725bd05362fb3443ad55071a69a12d9Eric Dumazet tw_ipv6_offset : 16; 1319e337b0fb3baa3c22490365b1bdee6f4741413d4Vegard Nossum kmemcheck_bitfield_end(flags); 1328feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo unsigned long tw_ttd; 1338feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo struct inet_bind_bucket *tw_tb; 1348feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo struct hlist_node tw_death_node; 1358feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo}; 136b903d324bee2627036d024dceed73b3c96558795Eric Dumazet#define tw_tclass tw_tos 1378feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1383ab5aee7fe840b5b1b35a8d1ac11c3de5281e611Eric Dumazetstatic inline void inet_twsk_add_node_rcu(struct inet_timewait_sock *tw, 1393ab5aee7fe840b5b1b35a8d1ac11c3de5281e611Eric Dumazet struct hlist_nulls_head *list) 1408feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo{ 1413ab5aee7fe840b5b1b35a8d1ac11c3de5281e611Eric Dumazet hlist_nulls_add_head_rcu(&tw->tw_node, list); 1428feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo} 1438feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1448feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melostatic inline void inet_twsk_add_bind_node(struct inet_timewait_sock *tw, 1458feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo struct hlist_head *list) 1468feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo{ 1478feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo hlist_add_head(&tw->tw_bind_node, list); 1488feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo} 1498feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1508feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melostatic inline int inet_twsk_dead_hashed(const struct inet_timewait_sock *tw) 1518feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo{ 152da753beaeb1446aa87bcca7e8a0026633a8914f0Akinobu Mita return !hlist_unhashed(&tw->tw_death_node); 1538feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo} 1548feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1558feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melostatic inline void inet_twsk_dead_node_init(struct inet_timewait_sock *tw) 1568feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo{ 1578feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo tw->tw_death_node.pprev = NULL; 1588feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo} 1598feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1608feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melostatic inline void __inet_twsk_del_dead_node(struct inet_timewait_sock *tw) 1618feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo{ 1628feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo __hlist_del(&tw->tw_death_node); 1638feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo inet_twsk_dead_node_init(tw); 1648feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo} 1658feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1668feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melostatic inline int inet_twsk_del_dead_node(struct inet_timewait_sock *tw) 1678feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo{ 1688feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo if (inet_twsk_dead_hashed(tw)) { 1698feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo __inet_twsk_del_dead_node(tw); 1708feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo return 1; 1718feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo } 1728feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo return 0; 1738feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo} 1748feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1758feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define inet_twsk_for_each(tw, node, head) \ 1763ab5aee7fe840b5b1b35a8d1ac11c3de5281e611Eric Dumazet hlist_nulls_for_each_entry(tw, node, head, tw_node) 1778feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1788feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define inet_twsk_for_each_inmate(tw, node, jail) \ 1798feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo hlist_for_each_entry(tw, node, jail, tw_death_node) 1808feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1818feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#define inet_twsk_for_each_inmate_safe(tw, node, safe, jail) \ 1828feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo hlist_for_each_entry_safe(tw, node, safe, jail, tw_death_node) 1838feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1848feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melostatic inline struct inet_timewait_sock *inet_twsk(const struct sock *sk) 1858feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo{ 1868feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo return (struct inet_timewait_sock *)sk; 1878feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo} 1888feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 18968835aba4d9b74e2f94106d13b6a4bddc447c4c8Eric Dumazetstatic inline __be32 sk_rcv_saddr(const struct sock *sk) 1908feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo{ 19168835aba4d9b74e2f94106d13b6a4bddc447c4c8Eric Dumazet/* both inet_sk() and inet_twsk() store rcv_saddr in skc_rcv_saddr */ 19268835aba4d9b74e2f94106d13b6a4bddc447c4c8Eric Dumazet return sk->__sk_common.skc_rcv_saddr; 1938feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo} 1948feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo 1957054fb9376e111d0edc06efcedbac6930a6caf76Pavel Emelyanovextern void inet_twsk_put(struct inet_timewait_sock *tw); 196e48c414ee61f4ac8d5cff2973e66a7cbc8a93aa5Arnaldo Carvalho de Melo 19713475a30b66cdb9250a34052c19ac98847373030Eric Dumazetextern int inet_twsk_unhash(struct inet_timewait_sock *tw); 19813475a30b66cdb9250a34052c19ac98847373030Eric Dumazet 1993cdaedae635b17ce23c738ce7d364b442310cdecEric Dumazetextern int inet_twsk_bind_unhash(struct inet_timewait_sock *tw, 2003cdaedae635b17ce23c738ce7d364b442310cdecEric Dumazet struct inet_hashinfo *hashinfo); 2013cdaedae635b17ce23c738ce7d364b442310cdecEric Dumazet 202c676270bcd25015b978722ec0352c330dcc87883Arnaldo Carvalho de Meloextern struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk, 203c676270bcd25015b978722ec0352c330dcc87883Arnaldo Carvalho de Melo const int state); 204c676270bcd25015b978722ec0352c330dcc87883Arnaldo Carvalho de Melo 205e48c414ee61f4ac8d5cff2973e66a7cbc8a93aa5Arnaldo Carvalho de Meloextern void __inet_twsk_hashdance(struct inet_timewait_sock *tw, 206e48c414ee61f4ac8d5cff2973e66a7cbc8a93aa5Arnaldo Carvalho de Melo struct sock *sk, 207e48c414ee61f4ac8d5cff2973e66a7cbc8a93aa5Arnaldo Carvalho de Melo struct inet_hashinfo *hashinfo); 208696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Melo 209696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Meloextern void inet_twsk_schedule(struct inet_timewait_sock *tw, 210696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Melo struct inet_timewait_death_row *twdr, 211696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Melo const int timeo, const int timewait_len); 212696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Meloextern void inet_twsk_deschedule(struct inet_timewait_sock *tw, 213696ab2d3bffc746fb8cf3712f066d42b9886aeedArnaldo Carvalho de Melo struct inet_timewait_death_row *twdr); 2143b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideaki 215b099ce2602d806deb41caaa578731848995cdb2aEric W. Biedermanextern void inet_twsk_purge(struct inet_hashinfo *hashinfo, 216d315492b1a6ba29da0fa2860759505ae1b2db857Daniel Lezcano struct inet_timewait_death_row *twdr, int family); 217d315492b1a6ba29da0fa2860759505ae1b2db857Daniel Lezcano 2183b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideakistatic inline 2193b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideakistruct net *twsk_net(const struct inet_timewait_sock *twsk) 2203b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideaki{ 221f943cbe6fb71d1389dd8684b9b4181e49f8e870cEric Dumazet return read_pnet(&twsk->tw_net); 2223b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideaki} 2233b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideaki 2243b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideakistatic inline 225f5aa23fd49063745f85644dd7a9330acd706add6Denis V. Lunevvoid twsk_net_set(struct inet_timewait_sock *twsk, struct net *net) 2263b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideaki{ 227f943cbe6fb71d1389dd8684b9b4181e49f8e870cEric Dumazet write_pnet(&twsk->tw_net, net); 2283b1e0a655f8eba44ab1ee2a1068d169ccfb853b9YOSHIFUJI Hideaki} 2298feaf0c0a5488b3d898a9c207eb6678f44ba3f26Arnaldo Carvalho de Melo#endif /* _INET_TIMEWAIT_SOCK_ */ 230