Commit | Line | Data |
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2874c5fd | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
8feaf0c0 ACM |
2 | /* |
3 | * INET An implementation of the TCP/IP protocol suite for the LINUX | |
4 | * operating system. INET is implemented using the BSD Socket | |
5 | * interface as the means of communication with the user level. | |
6 | * | |
7 | * Definitions for a generic INET TIMEWAIT sock | |
8 | * | |
9 | * From code originally in net/tcp.h | |
8feaf0c0 ACM |
10 | */ |
11 | #ifndef _INET_TIMEWAIT_SOCK_ | |
12 | #define _INET_TIMEWAIT_SOCK_ | |
13 | ||
8feaf0c0 | 14 | #include <linux/list.h> |
295ff7ed | 15 | #include <linux/timer.h> |
8feaf0c0 | 16 | #include <linux/types.h> |
295ff7ed | 17 | #include <linux/workqueue.h> |
8feaf0c0 | 18 | |
14c85021 | 19 | #include <net/inet_sock.h> |
8feaf0c0 ACM |
20 | #include <net/sock.h> |
21 | #include <net/tcp_states.h> | |
6d6ee43e | 22 | #include <net/timewait_sock.h> |
8feaf0c0 | 23 | |
60063497 | 24 | #include <linux/atomic.h> |
8feaf0c0 | 25 | |
8feaf0c0 ACM |
26 | struct inet_bind_bucket; |
27 | ||
28 | /* | |
29 | * This is a TIME_WAIT sock. It works around the memory consumption | |
30 | * problems of sockets in such a state on heavily loaded servers, but | |
31 | * without violating the protocol specification. | |
32 | */ | |
33 | struct inet_timewait_sock { | |
34 | /* | |
35 | * Now struct sock also uses sock_common, so please just | |
36 | * don't add nothing before this first member (__tw_common) --acme | |
37 | */ | |
38 | struct sock_common __tw_common; | |
39 | #define tw_family __tw_common.skc_family | |
40 | #define tw_state __tw_common.skc_state | |
41 | #define tw_reuse __tw_common.skc_reuse | |
3099a529 | 42 | #define tw_reuseport __tw_common.skc_reuseport |
9fe516ba | 43 | #define tw_ipv6only __tw_common.skc_ipv6only |
8feaf0c0 | 44 | #define tw_bound_dev_if __tw_common.skc_bound_dev_if |
3ab5aee7 | 45 | #define tw_node __tw_common.skc_nulls_node |
8feaf0c0 ACM |
46 | #define tw_bind_node __tw_common.skc_bind_node |
47 | #define tw_refcnt __tw_common.skc_refcnt | |
81c3d547 | 48 | #define tw_hash __tw_common.skc_hash |
8feaf0c0 | 49 | #define tw_prot __tw_common.skc_prot |
07feaebf | 50 | #define tw_net __tw_common.skc_net |
68835aba | 51 | #define tw_daddr __tw_common.skc_daddr |
efe4208f | 52 | #define tw_v6_daddr __tw_common.skc_v6_daddr |
68835aba | 53 | #define tw_rcv_saddr __tw_common.skc_rcv_saddr |
efe4208f | 54 | #define tw_v6_rcv_saddr __tw_common.skc_v6_rcv_saddr |
ce43b03e ED |
55 | #define tw_dport __tw_common.skc_dport |
56 | #define tw_num __tw_common.skc_num | |
33cf7c90 | 57 | #define tw_cookie __tw_common.skc_cookie |
8e5eb54d | 58 | #define tw_dr __tw_common.skc_tw_dr |
ce43b03e | 59 | |
00483690 | 60 | __u32 tw_mark; |
8feaf0c0 | 61 | volatile unsigned char tw_substate; |
8feaf0c0 | 62 | unsigned char tw_rcv_wscale; |
68835aba | 63 | |
8feaf0c0 | 64 | /* Socket demultiplex comparisons on incoming packets. */ |
68835aba | 65 | /* these three are in inet_sock */ |
23f33c2d | 66 | __be16 tw_sport; |
8feaf0c0 | 67 | /* And these are ours. */ |
27dd35e0 | 68 | unsigned int tw_transparent : 1, |
1d13a96c | 69 | tw_flowlabel : 20, |
27dd35e0 | 70 | tw_pad : 3, /* 3 bits hole */ |
1d13a96c | 71 | tw_tos : 8; |
c67b8555 | 72 | u32 tw_txhash; |
f6c0f5d2 | 73 | u32 tw_priority; |
789f558c | 74 | struct timer_list tw_timer; |
8feaf0c0 | 75 | struct inet_bind_bucket *tw_tb; |
936a192f KI |
76 | struct inet_bind2_bucket *tw_tb2; |
77 | struct hlist_node tw_bind2_node; | |
8feaf0c0 | 78 | }; |
b903d324 | 79 | #define tw_tclass tw_tos |
8feaf0c0 | 80 | |
936a192f KI |
81 | #define twsk_for_each_bound_bhash2(__tw, list) \ |
82 | hlist_for_each_entry(__tw, list, tw_bind2_node) | |
83 | ||
8feaf0c0 ACM |
84 | static inline struct inet_timewait_sock *inet_twsk(const struct sock *sk) |
85 | { | |
86 | return (struct inet_timewait_sock *)sk; | |
87 | } | |
88 | ||
05dbc7b5 | 89 | void inet_twsk_free(struct inet_timewait_sock *tw); |
1fd51155 | 90 | void inet_twsk_put(struct inet_timewait_sock *tw); |
e48c414e | 91 | |
fc01538f ED |
92 | void inet_twsk_bind_unhash(struct inet_timewait_sock *tw, |
93 | struct inet_hashinfo *hashinfo); | |
3cdaedae | 94 | |
1fd51155 | 95 | struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk, |
789f558c | 96 | struct inet_timewait_death_row *dr, |
1fd51155 | 97 | const int state); |
c676270b | 98 | |
ec94c269 ED |
99 | void inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk, |
100 | struct inet_hashinfo *hashinfo); | |
696ab2d3 | 101 | |
ed2e9239 ED |
102 | void __inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo, |
103 | bool rearm); | |
104 | ||
8695a144 | 105 | static inline void inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo) |
ed2e9239 ED |
106 | { |
107 | __inet_twsk_schedule(tw, timeo, false); | |
108 | } | |
109 | ||
8695a144 | 110 | static inline void inet_twsk_reschedule(struct inet_timewait_sock *tw, int timeo) |
ed2e9239 ED |
111 | { |
112 | __inet_twsk_schedule(tw, timeo, true); | |
113 | } | |
114 | ||
dbe7faa4 | 115 | void inet_twsk_deschedule_put(struct inet_timewait_sock *tw); |
3b1e0a65 | 116 | |
04c494e6 ED |
117 | void inet_twsk_purge(struct inet_hashinfo *hashinfo, int family); |
118 | ||
3b1e0a65 YH |
119 | static inline |
120 | struct net *twsk_net(const struct inet_timewait_sock *twsk) | |
121 | { | |
f943cbe6 | 122 | return read_pnet(&twsk->tw_net); |
3b1e0a65 YH |
123 | } |
124 | ||
125 | static inline | |
f5aa23fd | 126 | void twsk_net_set(struct inet_timewait_sock *twsk, struct net *net) |
3b1e0a65 | 127 | { |
f943cbe6 | 128 | write_pnet(&twsk->tw_net, net); |
3b1e0a65 | 129 | } |
8feaf0c0 | 130 | #endif /* _INET_TIMEWAIT_SOCK_ */ |