Commit 8feaf0c0 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by David S. Miller

[INET]: Generalise tcp_tw_bucket, aka TIME_WAIT sockets

This paves the way to generalise the rest of the sock ID lookup
routines and saves some bytes in TCPv4 TIME_WAIT sockets on distro
kernels (where IPv6 is always built as a module):

[root@qemu ~]# grep tw_sock /proc/slabinfo
tw_sock_TCPv6  0  0  128  31  1
tw_sock_TCP    0  0   96  41  1
[root@qemu ~]#

Now if a protocol wants to use the TIME_WAIT generic infrastructure it
only has to set the sk_prot->twsk_obj_size field with the size of its
inet_timewait_sock derived sock and proto_register will create
sk_prot->twsk_slab, for now its only for INET sockets, but we can
introduce timewait_sock later if some non INET transport protocolo
wants to use this stuff.

Next changesets will take advantage of this new infrastructure to
generalise even more TCP code.

[acme@toy net-2.6.14]$ grep built-in /tmp/before.size /tmp/after.size
/tmp/before.size: 188646   11764    5068  205478   322a6 net/ipv4/built-in.o
/tmp/after.size:  188144   11764    5068  204976   320b0 net/ipv4/built-in.o
[acme@toy net-2.6.14]$

Tested with both IPv4 & IPv6 (::1 (localhost) & ::ffff:172.20.0.1
(qemu host)).
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 33b62231
......@@ -308,6 +308,41 @@ static inline void inet_sk_copy_descendant(struct sock *sk_to,
#define __ipv6_only_sock(sk) (inet6_sk(sk)->ipv6only)
#define ipv6_only_sock(sk) ((sk)->sk_family == PF_INET6 && __ipv6_only_sock(sk))
#include <linux/tcp.h>
struct tcp6_timewait_sock {
struct tcp_timewait_sock tw_v6_sk;
struct in6_addr tw_v6_daddr;
struct in6_addr tw_v6_rcv_saddr;
};
static inline struct tcp6_timewait_sock *tcp6_twsk(const struct sock *sk)
{
return (struct tcp6_timewait_sock *)sk;
}
static inline struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk)
{
return likely(sk->sk_state != TCP_TIME_WAIT) ?
&inet6_sk(sk)->rcv_saddr : &tcp6_twsk(sk)->tw_v6_rcv_saddr;
}
static inline struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk)
{
return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL;
}
static inline int tcp_twsk_ipv6only(const struct sock *sk)
{
return inet_twsk(sk)->tw_ipv6only;
}
static inline int tcp_v6_ipv6only(const struct sock *sk)
{
return likely(sk->sk_state != TCP_TIME_WAIT) ?
ipv6_only_sock(sk) : tcp_twsk_ipv6only(sk);
}
#else
#define __ipv6_only_sock(sk) 0
#define ipv6_only_sock(sk) 0
......@@ -322,8 +357,19 @@ static inline struct raw6_sock *raw6_sk(const struct sock *sk)
return NULL;
}
#endif
#define __tcp_v6_rcv_saddr(__sk) NULL
#define tcp_v6_rcv_saddr(__sk) NULL
#define tcp_twsk_ipv6only(__sk) 0
#define tcp_v6_ipv6only(__sk) 0
#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
#endif
#define INET6_MATCH(__sk, __saddr, __daddr, __ports, __dif) \
(((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
((__sk)->sk_family == AF_INET6) && \
ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#endif
#endif /* __KERNEL__ */
#endif /* _IPV6_H */
......@@ -179,6 +179,7 @@ struct tcp_info
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <net/sock.h>
#include <net/inet_timewait_sock.h>
/* This defines a selective acknowledgement block. */
struct tcp_sack_block {
......@@ -387,6 +388,20 @@ static inline struct tcp_sock *tcp_sk(const struct sock *sk)
return (struct tcp_sock *)sk;
}
struct tcp_timewait_sock {
struct inet_timewait_sock tw_sk;
__u32 tw_rcv_nxt;
__u32 tw_snd_nxt;
__u32 tw_rcv_wnd;
__u32 tw_ts_recent;
long tw_ts_recent_stamp;
};
static inline struct tcp_timewait_sock *tcp_twsk(const struct sock *sk)
{
return (struct tcp_timewait_sock *)sk;
}
static inline void *tcp_ca(const struct tcp_sock *tp)
{
return (void *) tp->ca_priv;
......
......@@ -14,6 +14,8 @@
#ifndef _INET_HASHTABLES_H
#define _INET_HASHTABLES_H
#include <linux/config.h>
#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
......@@ -310,4 +312,43 @@ sherry_cache:
read_unlock(&hashinfo->lhash_lock);
return sk;
}
/* Socket demux engine toys. */
#ifdef __BIG_ENDIAN
#define INET_COMBINED_PORTS(__sport, __dport) \
(((__u32)(__sport) << 16) | (__u32)(__dport))
#else /* __LITTLE_ENDIAN */
#define INET_COMBINED_PORTS(__sport, __dport) \
(((__u32)(__dport) << 16) | (__u32)(__sport))
#endif
#if (BITS_PER_LONG == 64)
#ifdef __BIG_ENDIAN
#define INET_ADDR_COOKIE(__name, __saddr, __daddr) \
const __u64 __name = (((__u64)(__saddr)) << 32) | ((__u64)(__daddr));
#else /* __LITTLE_ENDIAN */
#define INET_ADDR_COOKIE(__name, __saddr, __daddr) \
const __u64 __name = (((__u64)(__daddr)) << 32) | ((__u64)(__saddr));
#endif /* __BIG_ENDIAN */
#define INET_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
(((*((__u64 *)&(inet_sk(__sk)->daddr))) == (__cookie)) && \
((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#define INET_TW_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
(((*((__u64 *)&(inet_twsk(__sk)->tw_daddr))) == (__cookie)) && \
((*((__u32 *)&(inet_twsk(__sk)->tw_dport))) == (__ports)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#else /* 32-bit arch */
#define INET_ADDR_COOKIE(__name, __saddr, __daddr)
#define INET_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif) \
((inet_sk(__sk)->daddr == (__saddr)) && \
(inet_sk(__sk)->rcv_saddr == (__daddr)) && \
((*((__u32 *)&(inet_sk(__sk)->dport))) == (__ports)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#define INET_TW_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif) \
((inet_twsk(__sk)->tw_daddr == (__saddr)) && \
(inet_twsk(__sk)->tw_rcv_saddr == (__daddr)) && \
((*((__u32 *)&(inet_twsk(__sk)->tw_dport))) == (__ports)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#endif /* 64-bit arch */
#endif /* _INET_HASHTABLES_H */
/*
* 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/config.h>
#include <linux/list.h>
#include <linux/types.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <asm/atomic.h>
#if (BITS_PER_LONG == 64)
#define INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES 8
#else
#define INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES 4
#endif
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_bound_dev_if __tw_common.skc_bound_dev_if
#define tw_node __tw_common.skc_node
#define tw_bind_node __tw_common.skc_bind_node
#define tw_refcnt __tw_common.skc_refcnt
#define tw_prot __tw_common.skc_prot
volatile unsigned char tw_substate;
/* 3 bits hole, try to pack */
unsigned char tw_rcv_wscale;
/* Socket demultiplex comparisons on incoming packets. */
/* these five are in inet_sock */
__u16 tw_sport;
__u32 tw_daddr __attribute__((aligned(INET_TIMEWAIT_ADDRCMP_ALIGN_BYTES)));
__u32 tw_rcv_saddr;
__u16 tw_dport;
__u16 tw_num;
/* And these are ours. */
__u8 tw_ipv6only:1;
/* 31 bits hole, try to pack */
int tw_hashent;
int tw_timeout;
unsigned long tw_ttd;
struct inet_bind_bucket *tw_tb;
struct hlist_node tw_death_node;
};
static inline void inet_twsk_add_node(struct inet_timewait_sock *tw,
struct hlist_head *list)
{
hlist_add_head(&tw->tw_node, list);
}
static inline void inet_twsk_add_bind_node(struct inet_timewait_sock *tw,
struct hlist_head *list)
{
hlist_add_head(&tw->tw_bind_node, list);
}
static inline int inet_twsk_dead_hashed(const struct inet_timewait_sock *tw)
{
return tw->tw_death_node.pprev != NULL;
}
static inline void inet_twsk_dead_node_init(struct inet_timewait_sock *tw)
{
tw->tw_death_node.pprev = NULL;
}
static inline void __inet_twsk_del_dead_node(struct inet_timewait_sock *tw)
{
__hlist_del(&tw->tw_death_node);
inet_twsk_dead_node_init(tw);
}
static inline int inet_twsk_del_dead_node(struct inet_timewait_sock *tw)
{
if (inet_twsk_dead_hashed(tw)) {
__inet_twsk_del_dead_node(tw);
return 1;
}
return 0;
}
#define inet_twsk_for_each(tw, node, head) \
hlist_for_each_entry(tw, node, head, tw_node)
#define inet_twsk_for_each_inmate(tw, node, jail) \
hlist_for_each_entry(tw, node, jail, tw_death_node)
#define inet_twsk_for_each_inmate_safe(tw, node, safe, jail) \
hlist_for_each_entry_safe(tw, node, safe, jail, tw_death_node)
static inline struct inet_timewait_sock *inet_twsk(const struct sock *sk)
{
return (struct inet_timewait_sock *)sk;
}
static inline u32 inet_rcv_saddr(const struct sock *sk)
{
return likely(sk->sk_state != TCP_TIME_WAIT) ?
inet_sk(sk)->rcv_saddr : inet_twsk(sk)->tw_rcv_saddr;
}
static inline void inet_twsk_put(struct inet_timewait_sock *tw)
{
if (atomic_dec_and_test(&tw->tw_refcnt)) {
#ifdef SOCK_REFCNT_DEBUG
printk(KERN_DEBUG "%s timewait_sock %p released\n",
tw->tw_prot->name, tw);
#endif
kmem_cache_free(tw->tw_prot->twsk_slab, tw);
}
}
#endif /* _INET_TIMEWAIT_SOCK_ */
......@@ -88,6 +88,7 @@ do { spin_lock_init(&((__sk)->sk_lock.slock)); \
} while(0)
struct sock;
struct proto;
/**
* struct sock_common - minimal network layer representation of sockets
......@@ -98,10 +99,11 @@ struct sock;
* @skc_node: main hash linkage for various protocol lookup tables
* @skc_bind_node: bind hash linkage for various protocol lookup tables
* @skc_refcnt: reference count
* @skc_prot: protocol handlers inside a network family
*
* This is the minimal network layer representation of sockets, the header
* for struct sock and struct tcp_tw_bucket.
*/
* for struct sock and struct inet_timewait_sock.
*/
struct sock_common {
unsigned short skc_family;
volatile unsigned char skc_state;
......@@ -110,11 +112,12 @@ struct sock_common {
struct hlist_node skc_node;
struct hlist_node skc_bind_node;
atomic_t skc_refcnt;
struct proto *skc_prot;
};
/**
* struct sock - network layer representation of sockets
* @__sk_common: shared layout with tcp_tw_bucket
* @__sk_common: shared layout with inet_timewait_sock
* @sk_shutdown: mask of %SEND_SHUTDOWN and/or %RCV_SHUTDOWN
* @sk_userlocks: %SO_SNDBUF and %SO_RCVBUF settings
* @sk_lock: synchronizer
......@@ -140,7 +143,6 @@ struct sock_common {
* @sk_backlog: always used with the per-socket spinlock held
* @sk_callback_lock: used with the callbacks in the end of this struct
* @sk_error_queue: rarely used
* @sk_prot: protocol handlers inside a network family
* @sk_prot_creator: sk_prot of original sock creator (see ipv6_setsockopt, IPV6_ADDRFORM for instance)
* @sk_err: last error
* @sk_err_soft: errors that don't cause failure but are the cause of a persistent failure not just 'timed out'
......@@ -173,7 +175,7 @@ struct sock_common {
*/
struct sock {
/*
* Now struct tcp_tw_bucket also uses sock_common, so please just
* Now struct inet_timewait_sock also uses sock_common, so please just
* don't add nothing before this first member (__sk_common) --acme
*/
struct sock_common __sk_common;
......@@ -184,6 +186,7 @@ struct sock {
#define sk_node __sk_common.skc_node
#define sk_bind_node __sk_common.skc_bind_node
#define sk_refcnt __sk_common.skc_refcnt
#define sk_prot __sk_common.skc_prot
unsigned char sk_shutdown : 2,
sk_no_check : 2,
sk_userlocks : 4;
......@@ -218,7 +221,6 @@ struct sock {
struct sk_buff *tail;
} sk_backlog;
struct sk_buff_head sk_error_queue;
struct proto *sk_prot;
struct proto *sk_prot_creator;
rwlock_t sk_callback_lock;
int sk_err,
......@@ -557,6 +559,9 @@ struct proto {
kmem_cache_t *slab;
unsigned int obj_size;
kmem_cache_t *twsk_slab;
unsigned int twsk_obj_size;
struct request_sock_ops *rsk_prot;
struct module *owner;
......
......@@ -38,207 +38,14 @@
#include <net/ip.h>
#include <net/tcp_states.h>
#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
#include <linux/ipv6.h>
#endif
#include <linux/seq_file.h>
extern struct inet_hashinfo tcp_hashinfo;
#if (BITS_PER_LONG == 64)
#define TCP_ADDRCMP_ALIGN_BYTES 8
#else
#define TCP_ADDRCMP_ALIGN_BYTES 4
#endif
/* This is a TIME_WAIT bucket. It works around the memory consumption
* problems of sockets in such a state on heavily loaded servers, but
* without violating the protocol specification.
*/
struct tcp_tw_bucket {
/*
* 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_bound_dev_if __tw_common.skc_bound_dev_if
#define tw_node __tw_common.skc_node
#define tw_bind_node __tw_common.skc_bind_node
#define tw_refcnt __tw_common.skc_refcnt
volatile unsigned char tw_substate;
unsigned char tw_rcv_wscale;
__u16 tw_sport;
/* Socket demultiplex comparisons on incoming packets. */
/* these five are in inet_sock */
__u32 tw_daddr
__attribute__((aligned(TCP_ADDRCMP_ALIGN_BYTES)));
__u32 tw_rcv_saddr;
__u16 tw_dport;
__u16 tw_num;
/* And these are ours. */
int tw_hashent;
int tw_timeout;
__u32 tw_rcv_nxt;
__u32 tw_snd_nxt;
__u32 tw_rcv_wnd;
__u32 tw_ts_recent;
long tw_ts_recent_stamp;
unsigned long tw_ttd;
struct inet_bind_bucket *tw_tb;
struct hlist_node tw_death_node;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
struct in6_addr tw_v6_daddr;
struct in6_addr tw_v6_rcv_saddr;
int tw_v6_ipv6only;
#endif
};
static __inline__ void tw_add_node(struct tcp_tw_bucket *tw,
struct hlist_head *list)
{
hlist_add_head(&tw->tw_node, list);
}
static __inline__ void tw_add_bind_node(struct tcp_tw_bucket *tw,
struct hlist_head *list)
{
hlist_add_head(&tw->tw_bind_node, list);
}
static inline int tw_dead_hashed(struct tcp_tw_bucket *tw)
{
return tw->tw_death_node.pprev != NULL;
}
static __inline__ void tw_dead_node_init(struct tcp_tw_bucket *tw)
{
tw->tw_death_node.pprev = NULL;
}
static __inline__ void __tw_del_dead_node(struct tcp_tw_bucket *tw)
{
__hlist_del(&tw->tw_death_node);
tw_dead_node_init(tw);
}
static __inline__ int tw_del_dead_node(struct tcp_tw_bucket *tw)
{
if (tw_dead_hashed(tw)) {
__tw_del_dead_node(tw);
return 1;
}
return 0;
}
#define tw_for_each(tw, node, head) \
hlist_for_each_entry(tw, node, head, tw_node)
#define tw_for_each_inmate(tw, node, jail) \
hlist_for_each_entry(tw, node, jail, tw_death_node)
#define tw_for_each_inmate_safe(tw, node, safe, jail) \
hlist_for_each_entry_safe(tw, node, safe, jail, tw_death_node)
#define tcptw_sk(__sk) ((struct tcp_tw_bucket *)(__sk))
static inline u32 tcp_v4_rcv_saddr(const struct sock *sk)
{
return likely(sk->sk_state != TCP_TIME_WAIT) ?
inet_sk(sk)->rcv_saddr : tcptw_sk(sk)->tw_rcv_saddr;
}
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
static inline struct in6_addr *__tcp_v6_rcv_saddr(const struct sock *sk)
{
return likely(sk->sk_state != TCP_TIME_WAIT) ?
&inet6_sk(sk)->rcv_saddr : &tcptw_sk(sk)->tw_v6_rcv_saddr;
}
static inline struct in6_addr *tcp_v6_rcv_saddr(const struct sock *sk)
{
return sk->sk_family == AF_INET6 ? __tcp_v6_rcv_saddr(sk) : NULL;
}
#define tcptw_sk_ipv6only(__sk) (tcptw_sk(__sk)->tw_v6_ipv6only)
static inline int tcp_v6_ipv6only(const struct sock *sk)
{
return likely(sk->sk_state != TCP_TIME_WAIT) ?
ipv6_only_sock(sk) : tcptw_sk_ipv6only(sk);
}
#else
# define __tcp_v6_rcv_saddr(__sk) NULL
# define tcp_v6_rcv_saddr(__sk) NULL
# define tcptw_sk_ipv6only(__sk) 0
# define tcp_v6_ipv6only(__sk) 0
#endif
extern kmem_cache_t *tcp_timewait_cachep;
static inline void tcp_tw_put(struct tcp_tw_bucket *tw)
{
if (atomic_dec_and_test(&tw->tw_refcnt)) {
#ifdef SOCK_REFCNT_DEBUG
printk(KERN_DEBUG "tw_bucket %p released\n", tw);
#endif
kmem_cache_free(tcp_timewait_cachep, tw);
}
}
extern atomic_t tcp_orphan_count;
extern int tcp_tw_count;
extern void tcp_time_wait(struct sock *sk, int state, int timeo);
extern void tcp_tw_deschedule(struct tcp_tw_bucket *tw);
/* Socket demux engine toys. */
#ifdef __BIG_ENDIAN
#define TCP_COMBINED_PORTS(__sport, __dport) \
(((__u32)(__sport)<<16) | (__u32)(__dport))
#else /* __LITTLE_ENDIAN */
#define TCP_COMBINED_PORTS(__sport, __dport) \
(((__u32)(__dport)<<16) | (__u32)(__sport))
#endif
#if (BITS_PER_LONG == 64)
#ifdef __BIG_ENDIAN
#define TCP_V4_ADDR_COOKIE(__name, __saddr, __daddr) \
__u64 __name = (((__u64)(__saddr))<<32)|((__u64)(__daddr));
#else /* __LITTLE_ENDIAN */
#define TCP_V4_ADDR_COOKIE(__name, __saddr, __daddr) \
__u64 __name = (((__u64)(__daddr))<<32)|((__u64)(__saddr));
#endif /* __BIG_ENDIAN */
#define TCP_IPV4_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
(((*((__u64 *)&(inet_sk(__sk)->daddr)))== (__cookie)) && \
((*((__u32 *)&(inet_sk(__sk)->dport)))== (__ports)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#define TCP_IPV4_TW_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
(((*((__u64 *)&(tcptw_sk(__sk)->tw_daddr))) == (__cookie)) && \
((*((__u32 *)&(tcptw_sk(__sk)->tw_dport))) == (__ports)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#else /* 32-bit arch */
#define TCP_V4_ADDR_COOKIE(__name, __saddr, __daddr)
#define TCP_IPV4_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
((inet_sk(__sk)->daddr == (__saddr)) && \
(inet_sk(__sk)->rcv_saddr == (__daddr)) && \
((*((__u32 *)&(inet_sk(__sk)->dport)))== (__ports)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#define TCP_IPV4_TW_MATCH(__sk, __cookie, __saddr, __daddr, __ports, __dif)\
((tcptw_sk(__sk)->tw_daddr == (__saddr)) && \
(tcptw_sk(__sk)->tw_rcv_saddr == (__daddr)) && \
((*((__u32 *)&(tcptw_sk(__sk)->tw_dport))) == (__ports)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
#endif /* 64-bit arch */
#define TCP_IPV6_MATCH(__sk, __saddr, __daddr, __ports, __dif) \
(((*((__u32 *)&(inet_sk(__sk)->dport)))== (__ports)) && \
((__sk)->sk_family == AF_INET6) && \
ipv6_addr_equal(&inet6_sk(__sk)->daddr, (__saddr)) && \
ipv6_addr_equal(&inet6_sk(__sk)->rcv_saddr, (__daddr)) && \
(!((__sk)->sk_bound_dev_if) || ((__sk)->sk_bound_dev_if == (__dif))))
extern void tcp_tw_deschedule(struct inet_timewait_sock *tw);
#define MAX_TCP_HEADER (128 + MAX_HEADER)
......@@ -543,7 +350,7 @@ extern int tcp_v4_rcv(struct sk_buff *skb);
extern int tcp_v4_remember_stamp(struct sock *sk);
extern int tcp_v4_tw_remember_stamp(struct tcp_tw_bucket *tw);
extern int tcp_v4_tw_remember_stamp(struct inet_timewait_sock *tw);
extern int tcp_sendmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg, size_t size);
......@@ -616,10 +423,9 @@ enum tcp_tw_status
};
extern enum tcp_tw_status tcp_timewait_state_process(struct tcp_tw_bucket *tw,
extern enum tcp_tw_status tcp_timewait_state_process(struct inet_timewait_sock *tw,
struct sk_buff *skb,
struct tcphdr *th,
unsigned len);
const struct tcphdr *th);
extern struct sock * tcp_check_req(struct sock *sk,struct sk_buff *skb,
struct request_sock *req,
......
......@@ -1378,7 +1378,8 @@ static LIST_HEAD(proto_list);
int proto_register(struct proto *prot, int alloc_slab)
{
char *request_sock_slab_name;
char *request_sock_slab_name = NULL;
char *timewait_sock_slab_name;
int rc = -ENOBUFS;
if (alloc_slab) {
......@@ -1409,6 +1410,23 @@ int proto_register(struct proto *prot, int alloc_slab)
goto out_free_request_sock_slab_name;
}
}
if (prot->twsk_obj_size) {
static const char mask[] = "tw_sock_%s";
timewait_sock_slab_name = kmalloc(strlen(prot->name) + sizeof(mask) - 1, GFP_KERNEL);
if (timewait_sock_slab_name == NULL)
goto out_free_request_sock_slab;
sprintf(timewait_sock_slab_name, mask, prot->name);
prot->twsk_slab = kmem_cache_create(timewait_sock_slab_name,
prot->twsk_obj_size,
0, SLAB_HWCACHE_ALIGN,
NULL, NULL);
if (prot->twsk_slab == NULL)
goto out_free_timewait_sock_slab_name;
}
}
write_lock(&proto_list_lock);
......@@ -1417,6 +1435,13 @@ int proto_register(struct proto *prot, int alloc_slab)
rc = 0;
out:
return rc;
out_free_timewait_sock_slab_name:
kfree(timewait_sock_slab_name);
out_free_request_sock_slab:
if (prot->rsk_prot && prot->rsk_prot->slab) {
kmem_cache_destroy(prot->rsk_prot->slab);
prot->rsk_prot->slab = NULL;
}
out_free_request_sock_slab_name:
kfree(request_sock_slab_name);
out_free_sock_slab:
......@@ -1444,6 +1469,14 @@ void proto_unregister(struct proto *prot)
prot->rsk_prot->slab = NULL;
}
if (prot->twsk_slab != NULL) {
const char *name = kmem_cache_name(prot->twsk_slab);
kmem_cache_destroy(prot->twsk_slab);
kfree(name);
prot->twsk_slab = NULL;
}
list_del(&prot->node);
write_unlock(&proto_list_lock);
}
......
......@@ -271,8 +271,6 @@ int sysctl_tcp_fin_timeout = TCP_FIN_TIMEOUT;