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15#ifndef _INET_TIMEWAIT_SOCK_
16#define _INET_TIMEWAIT_SOCK_
17
18
19#include <linux/kmemcheck.h>
20#include <linux/list.h>
21#include <linux/timer.h>
22#include <linux/types.h>
23#include <linux/workqueue.h>
24
25#include <net/inet_sock.h>
26#include <net/sock.h>
27#include <net/tcp_states.h>
28#include <net/timewait_sock.h>
29
30#include <linux/atomic.h>
31
32struct inet_hashinfo;
33
34struct inet_timewait_death_row {
35 atomic_t tw_count;
36
37 struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp;
38 int sysctl_tw_recycle;
39 int sysctl_max_tw_buckets;
40};
41
42struct inet_bind_bucket;
43
44
45
46
47
48
49struct inet_timewait_sock {
50
51
52
53
54 struct sock_common __tw_common;
55#define tw_family __tw_common.skc_family
56#define tw_state __tw_common.skc_state
57#define tw_reuse __tw_common.skc_reuse
58#define tw_ipv6only __tw_common.skc_ipv6only
59#define tw_bound_dev_if __tw_common.skc_bound_dev_if
60#define tw_node __tw_common.skc_nulls_node
61#define tw_bind_node __tw_common.skc_bind_node
62#define tw_refcnt __tw_common.skc_refcnt
63#define tw_hash __tw_common.skc_hash
64#define tw_prot __tw_common.skc_prot
65#define tw_net __tw_common.skc_net
66#define tw_daddr __tw_common.skc_daddr
67#define tw_v6_daddr __tw_common.skc_v6_daddr
68#define tw_rcv_saddr __tw_common.skc_rcv_saddr
69#define tw_v6_rcv_saddr __tw_common.skc_v6_rcv_saddr
70#define tw_dport __tw_common.skc_dport
71#define tw_num __tw_common.skc_num
72#define tw_cookie __tw_common.skc_cookie
73
74 int tw_timeout;
75 volatile unsigned char tw_substate;
76 unsigned char tw_rcv_wscale;
77
78
79
80 __be16 tw_sport;
81 kmemcheck_bitfield_begin(flags);
82
83 unsigned int tw_kill : 1,
84 tw_transparent : 1,
85 tw_flowlabel : 20,
86 tw_pad : 2,
87 tw_tos : 8;
88 kmemcheck_bitfield_end(flags);
89 struct timer_list tw_timer;
90 struct inet_bind_bucket *tw_tb;
91 struct inet_timewait_death_row *tw_dr;
92};
93#define tw_tclass tw_tos
94
95static inline struct inet_timewait_sock *inet_twsk(const struct sock *sk)
96{
97 return (struct inet_timewait_sock *)sk;
98}
99
100void inet_twsk_free(struct inet_timewait_sock *tw);
101void inet_twsk_put(struct inet_timewait_sock *tw);
102
103int inet_twsk_unhash(struct inet_timewait_sock *tw);
104
105int inet_twsk_bind_unhash(struct inet_timewait_sock *tw,
106 struct inet_hashinfo *hashinfo);
107
108struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk,
109 struct inet_timewait_death_row *dr,
110 const int state);
111
112void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
113 struct inet_hashinfo *hashinfo);
114
115void inet_twsk_schedule(struct inet_timewait_sock *tw, const int timeo);
116void inet_twsk_deschedule(struct inet_timewait_sock *tw);
117
118void inet_twsk_purge(struct inet_hashinfo *hashinfo,
119 struct inet_timewait_death_row *twdr, int family);
120
121static inline
122struct net *twsk_net(const struct inet_timewait_sock *twsk)
123{
124 return read_pnet(&twsk->tw_net);
125}
126
127static inline
128void twsk_net_set(struct inet_timewait_sock *twsk, struct net *net)
129{
130 write_pnet(&twsk->tw_net, net);
131}
132#endif
133