author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* INET An implementation of the TCP/IP protocol suite for the LINUX |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* operating system. INET is implemented using the BSD Socket |
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* interface as the means of communication with the user level. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* Definitions for a generic INET TIMEWAIT sock |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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* From code originally in net/tcp.h |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* This program is free software; you can redistribute it and/or |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* modify it under the terms of the GNU General Public License |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* as published by the Free Software Foundation; either version |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* 2 of the License, or (at your option) any later version. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifndef _INET_TIMEWAIT_SOCK_ |
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#define _INET_TIMEWAIT_SOCK_ |
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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#include <linux/list.h> |
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#include <linux/module.h> |
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#include <linux/timer.h> |
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#include <linux/types.h> |
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#include <linux/workqueue.h> |
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|
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#include <net/inet_sock.h> |
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#include <net/sock.h> |
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#include <net/tcp_states.h> |
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#include <net/timewait_sock.h> |
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|
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#include <asm/atomic.h> |
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|
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struct inet_hashinfo; |
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|
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#define INET_TWDR_RECYCLE_SLOTS_LOG 5 |
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#define INET_TWDR_RECYCLE_SLOTS (1 << INET_TWDR_RECYCLE_SLOTS_LOG) |
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|
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/* |
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* If time > 4sec, it is "slow" path, no recycling is required, |
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* so that we select tick to get range about 4 seconds. |
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*/ |
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#if HZ <= 16 || HZ > 4096 |
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# error Unsupported: HZ <= 16 or HZ > 4096 |
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#elif HZ <= 32 |
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# define INET_TWDR_RECYCLE_TICK (5 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) |
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#elif HZ <= 64 |
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# define INET_TWDR_RECYCLE_TICK (6 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) |
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#elif HZ <= 128 |
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# define INET_TWDR_RECYCLE_TICK (7 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) |
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#elif HZ <= 256 |
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# define INET_TWDR_RECYCLE_TICK (8 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) |
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#elif HZ <= 512 |
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# define INET_TWDR_RECYCLE_TICK (9 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) |
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#elif HZ <= 1024 |
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# define INET_TWDR_RECYCLE_TICK (10 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) |
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#elif HZ <= 2048 |
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# define INET_TWDR_RECYCLE_TICK (11 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) |
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#else |
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# define INET_TWDR_RECYCLE_TICK (12 + 2 - INET_TWDR_RECYCLE_SLOTS_LOG) |
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#endif |
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|
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/* TIME_WAIT reaping mechanism. */ |
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#define INET_TWDR_TWKILL_SLOTS 8 /* Please keep this a power of 2. */ |
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|
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#define INET_TWDR_TWKILL_QUOTA 100 |
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|
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struct inet_timewait_death_row { |
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/* Short-time timewait calendar */ |
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int twcal_hand; |
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unsigned long twcal_jiffie; |
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struct timer_list twcal_timer; |
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struct hlist_head twcal_row[INET_TWDR_RECYCLE_SLOTS]; |
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|
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spinlock_t death_lock; |
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int tw_count; |
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int period; |
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u32 thread_slots; |
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struct work_struct twkill_work; |
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struct timer_list tw_timer; |
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int slot; |
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struct hlist_head cells[INET_TWDR_TWKILL_SLOTS]; |
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struct inet_hashinfo *hashinfo; |
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int sysctl_tw_recycle; |
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int sysctl_max_tw_buckets; |
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}; |
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|
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extern void inet_twdr_hangman(unsigned long data); |
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extern void inet_twdr_twkill_work(struct work_struct *work); |
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extern void inet_twdr_twcal_tick(unsigned long data); |
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|
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#if (BITS_PER_LONG == 64) |
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#define INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES 8 |
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#else |
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#define INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES 4 |
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#endif |
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|
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struct inet_bind_bucket; |
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|
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/* |
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* This is a TIME_WAIT sock. It works around the memory consumption |
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* problems of sockets in such a state on heavily loaded servers, but |
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* without violating the protocol specification. |
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*/ |
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struct inet_timewait_sock { |
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/* |
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* Now struct sock also uses sock_common, so please just |
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* don't add nothing before this first member (__tw_common) --acme |
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*/ |
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struct sock_common __tw_common; |
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#define tw_family __tw_common.skc_family |
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#define tw_state __tw_common.skc_state |
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111 |
#define tw_reuse __tw_common.skc_reuse |
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112 |
#define tw_bound_dev_if __tw_common.skc_bound_dev_if |
2 | 113 |
#define tw_node __tw_common.skc_nulls_node |
0
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114 |
#define tw_bind_node __tw_common.skc_bind_node |
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115 |
#define tw_refcnt __tw_common.skc_refcnt |
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116 |
#define tw_hash __tw_common.skc_hash |
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117 |
#define tw_prot __tw_common.skc_prot |
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118 |
#define tw_net __tw_common.skc_net |
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119 |
int tw_timeout; |
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120 |
volatile unsigned char tw_substate; |
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121 |
/* 3 bits hole, try to pack */ |
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122 |
unsigned char tw_rcv_wscale; |
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123 |
/* Socket demultiplex comparisons on incoming packets. */ |
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124 |
/* these five are in inet_sock */ |
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125 |
__be16 tw_sport; |
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126 |
__be32 tw_daddr __attribute__((aligned(INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES))); |
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127 |
__be32 tw_rcv_saddr; |
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128 |
__be16 tw_dport; |
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129 |
__u16 tw_num; |
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130 |
/* And these are ours. */ |
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131 |
__u8 tw_ipv6only:1, |
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132 |
tw_transparent:1; |
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133 |
/* 15 bits hole, try to pack */ |
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134 |
__u16 tw_ipv6_offset; |
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|
135 |
unsigned long tw_ttd; |
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|
136 |
struct inet_bind_bucket *tw_tb; |
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137 |
struct hlist_node tw_death_node; |
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|
138 |
}; |
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139 |
|
2 | 140 |
static inline void inet_twsk_add_node_rcu(struct inet_timewait_sock *tw, |
141 |
struct hlist_nulls_head *list) |
|
0
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|
142 |
{ |
2 | 143 |
hlist_nulls_add_head_rcu(&tw->tw_node, list); |
0
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|
144 |
} |
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|
145 |
|
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146 |
static inline void inet_twsk_add_bind_node(struct inet_timewait_sock *tw, |
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147 |
struct hlist_head *list) |
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148 |
{ |
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|
149 |
hlist_add_head(&tw->tw_bind_node, list); |
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150 |
} |
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151 |
|
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152 |
static inline int inet_twsk_dead_hashed(const struct inet_timewait_sock *tw) |
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153 |
{ |
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|
154 |
return !hlist_unhashed(&tw->tw_death_node); |
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|
155 |
} |
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|
156 |
|
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|
157 |
static inline void inet_twsk_dead_node_init(struct inet_timewait_sock *tw) |
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158 |
{ |
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|
159 |
tw->tw_death_node.pprev = NULL; |
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|
160 |
} |
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|
161 |
|
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|
162 |
static inline void __inet_twsk_del_dead_node(struct inet_timewait_sock *tw) |
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|
163 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
164 |
__hlist_del(&tw->tw_death_node); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
165 |
inet_twsk_dead_node_init(tw); |
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parents:
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|
166 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
167 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
168 |
static inline int inet_twsk_del_dead_node(struct inet_timewait_sock *tw) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
169 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
170 |
if (inet_twsk_dead_hashed(tw)) { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
171 |
__inet_twsk_del_dead_node(tw); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
172 |
return 1; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
173 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
174 |
return 0; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
175 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
176 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
177 |
#define inet_twsk_for_each(tw, node, head) \ |
2 | 178 |
hlist_nulls_for_each_entry(tw, node, head, tw_node) |
0
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parents:
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|
179 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
180 |
#define inet_twsk_for_each_inmate(tw, node, jail) \ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
181 |
hlist_for_each_entry(tw, node, jail, tw_death_node) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
182 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
183 |
#define inet_twsk_for_each_inmate_safe(tw, node, safe, jail) \ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
184 |
hlist_for_each_entry_safe(tw, node, safe, jail, tw_death_node) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
185 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
186 |
static inline struct inet_timewait_sock *inet_twsk(const struct sock *sk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
187 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
188 |
return (struct inet_timewait_sock *)sk; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
189 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
190 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
191 |
static inline __be32 inet_rcv_saddr(const struct sock *sk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
192 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
193 |
return likely(sk->sk_state != TCP_TIME_WAIT) ? |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
194 |
inet_sk(sk)->rcv_saddr : inet_twsk(sk)->tw_rcv_saddr; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
195 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
196 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
197 |
extern void inet_twsk_put(struct inet_timewait_sock *tw); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
198 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
199 |
extern struct inet_timewait_sock *inet_twsk_alloc(const struct sock *sk, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
200 |
const int state); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
201 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
202 |
extern void __inet_twsk_hashdance(struct inet_timewait_sock *tw, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
203 |
struct sock *sk, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
204 |
struct inet_hashinfo *hashinfo); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
205 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
206 |
extern void inet_twsk_schedule(struct inet_timewait_sock *tw, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
207 |
struct inet_timewait_death_row *twdr, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
208 |
const int timeo, const int timewait_len); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
209 |
extern void inet_twsk_deschedule(struct inet_timewait_sock *tw, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
210 |
struct inet_timewait_death_row *twdr); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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changeset
|
211 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
212 |
extern void inet_twsk_purge(struct net *net, struct inet_hashinfo *hashinfo, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
213 |
struct inet_timewait_death_row *twdr, int family); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
214 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
215 |
static inline |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
216 |
struct net *twsk_net(const struct inet_timewait_sock *twsk) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
217 |
{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
218 |
#ifdef CONFIG_NET_NS |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
219 |
return twsk->tw_net; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
220 |
#else |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
221 |
return &init_net; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
222 |
#endif |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
223 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
224 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
225 |
static inline |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
changeset
|
226 |
void twsk_net_set(struct inet_timewait_sock *twsk, struct net *net) |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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{ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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#ifdef CONFIG_NET_NS |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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229 |
twsk->tw_net = net; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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changeset
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230 |
#endif |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
231 |
} |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
232 |
#endif /* _INET_TIMEWAIT_SOCK_ */ |