| /* |
| * INET An implementation of the TCP/IP protocol suite for the LINUX |
| * operating system. INET is implemented using the BSD Socket |
| * interface as the means of communication with the user level. |
| * |
| * Definitions for a generic INET TIMEWAIT sock |
| * |
| * From code originally in net/tcp.h |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| #ifndef _INET_TIMEWAIT_SOCK_ |
| #define _INET_TIMEWAIT_SOCK_ |
| |
| |
| #include <linux/kmemcheck.h> |
| #include <linux/list.h> |
| #include <linux/timer.h> |
| #include <linux/types.h> |
| #include <linux/workqueue.h> |
| |
| #include <net/inet_sock.h> |
| #include <net/sock.h> |
| #include <net/tcp_states.h> |
| #include <net/timewait_sock.h> |
| |
| #include <linux/atomic.h> |
| |
| struct inet_hashinfo; |
| |
| struct inet_timewait_death_row { |
| atomic_t tw_count; |
| |
| struct inet_hashinfo *hashinfo ____cacheline_aligned_in_smp; |
| int sysctl_tw_recycle; |
| int sysctl_max_tw_buckets; |
| }; |
| |
| struct inet_bind_bucket; |
| |
| /* |
| * This is a TIME_WAIT sock. It works around the memory consumption |
| * problems of sockets in such a state on heavily loaded servers, but |
| * without violating the protocol specification. |
| */ |
| struct inet_timewait_sock { |
| /* |
| * Now struct sock also uses sock_common, so please just |
| * don't add nothing before this first member (__tw_common) --acme |
| */ |
| struct sock_common __tw_common; |
| #define tw_family __tw_common.skc_family |
| #define tw_state __tw_common.skc_state |
| #define tw_reuse __tw_common.skc_reuse |
| #define tw_ipv6only __tw_common.skc_ipv6only |
| #define tw_bound_dev_if __tw_common.skc_bound_dev_if |
| #define tw_node __tw_common.skc_nulls_node |
| #define tw_bind_node __tw_common.skc_bind_node |
| #define tw_refcnt __tw_common.skc_refcnt |
| #define tw_hash __tw_common.skc_hash |
| #define tw_prot __tw_common.skc_prot |
| #define tw_net __tw_common.skc_net |
| #define tw_daddr __tw_common.skc_daddr |
| #define tw_v6_daddr __tw_common.skc_v6_daddr |
| #define tw_rcv_saddr __tw_common.skc_rcv_saddr |
| #define tw_v6_rcv_saddr __tw_common.skc_v6_rcv_saddr |
| #define tw_dport __tw_common.skc_dport |
| #define tw_num __tw_common.skc_num |
| #define tw_cookie __tw_common.skc_cookie |
| |
| int tw_timeout; |
| volatile unsigned char tw_substate; |
| unsigned char tw_rcv_wscale; |
| |
| /* Socket demultiplex comparisons on incoming packets. */ |
| /* these three are in inet_sock */ |
| __be16 tw_sport; |
| kmemcheck_bitfield_begin(flags); |
| /* And these are ours. */ |
| unsigned int tw_kill : 1, |
| tw_transparent : 1, |
| tw_flowlabel : 20, |
| tw_pad : 2, /* 2 bits hole */ |
| tw_tos : 8; |
| kmemcheck_bitfield_end(flags); |
| struct timer_list tw_timer; |
| struct inet_bind_bucket *tw_tb; |
| struct inet_timewait_death_row *tw_dr; |
| }; |
| #define tw_tclass tw_tos |
| |
| static inline struct inet_timewait_sock *inet_twsk(const struct sock *sk) |
| { |
| return (struct inet_timewait_sock *)sk; |
| } |
| |
| void inet_twsk_free(struct inet_timewait_sock *tw); |
| void inet_twsk_put(struct inet_timewait_sock *tw); |
| |
| int inet_twsk_unhash(struct inet_timewait_sock *tw); |
| |
| int inet_twsk_bind_unhash(struct inet_timewait_sock *tw, |
| struct inet_hashinfo *hashinfo); |
| |
| struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk, |
| struct inet_timewait_death_row *dr, |
| const int state); |
| |
| void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk, |
| struct inet_hashinfo *hashinfo); |
| |
| void __inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo, |
| bool rearm); |
| |
| static inline void inet_twsk_schedule(struct inet_timewait_sock *tw, int timeo) |
| { |
| __inet_twsk_schedule(tw, timeo, false); |
| } |
| |
| static inline void inet_twsk_reschedule(struct inet_timewait_sock *tw, int timeo) |
| { |
| __inet_twsk_schedule(tw, timeo, true); |
| } |
| |
| void inet_twsk_deschedule(struct inet_timewait_sock *tw); |
| |
| void inet_twsk_purge(struct inet_hashinfo *hashinfo, |
| struct inet_timewait_death_row *twdr, int family); |
| |
| static inline |
| struct net *twsk_net(const struct inet_timewait_sock *twsk) |
| { |
| return read_pnet(&twsk->tw_net); |
| } |
| |
| static inline |
| void twsk_net_set(struct inet_timewait_sock *twsk, struct net *net) |
| { |
| write_pnet(&twsk->tw_net, net); |
| } |
| #endif /* _INET_TIMEWAIT_SOCK_ */ |