[IPV6]: Generalise the tcp_v6_lookup routines
In the same way as was done with the v4 counterparts, this will be moved to inet6_hashtables.c. Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo
David S. Miller
Родитель
b766b305d3
Коммит
505cbfc577
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@ -193,6 +193,11 @@ struct inet6_skb_parm {
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#define IP6CB(skb) ((struct inet6_skb_parm*)((skb)->cb))
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static inline int inet6_iif(const struct sk_buff *skb)
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{
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return IP6CB(skb)->iif;
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}
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struct tcp6_request_sock {
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struct tcp_request_sock req;
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struct in6_addr loc_addr;
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@ -0,0 +1,26 @@
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/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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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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*
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* Authors: Lotsa people, from code originally in tcp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _INET6_HASHTABLES_H
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#define _INET6_HASHTABLES_H
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#include <linux/types.h>
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struct in6_addr;
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struct inet_hashinfo;
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extern struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
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const struct in6_addr *saddr, const u16 sport,
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const struct in6_addr *daddr, const u16 dport,
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const int dif);
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#endif /* _INET6_HASHTABLES_H */
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@ -425,9 +425,6 @@ config IP_TCPDIAG
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If unsure, say Y.
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config IP_TCPDIAG_IPV6
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def_bool (IP_TCPDIAG=y && IPV6=y) || (IP_TCPDIAG=m && IPV6)
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config IP_TCPDIAG_DCCP
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def_bool (IP_TCPDIAG=y && IP_DCCP=y) || (IP_TCPDIAG=m && IP_DCCP)
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@ -24,6 +24,10 @@
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#include <net/tcp.h>
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#include <net/ipv6.h>
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#include <net/inet_common.h>
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#include <net/inet_connection_sock.h>
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#include <net/inet_hashtables.h>
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#include <net/inet_timewait_sock.h>
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#include <net/inet6_hashtables.h>
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#include <linux/inet.h>
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#include <linux/stddef.h>
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@ -102,7 +106,7 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
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r->tcpdiag_wqueue = 0;
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r->tcpdiag_uid = 0;
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r->tcpdiag_inode = 0;
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#ifdef CONFIG_IP_TCPDIAG_IPV6
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
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if (r->tcpdiag_family == AF_INET6) {
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const struct tcp6_timewait_sock *tcp6tw = tcp6_twsk(sk);
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@ -121,7 +125,7 @@ static int tcpdiag_fill(struct sk_buff *skb, struct sock *sk,
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r->id.tcpdiag_src[0] = inet->rcv_saddr;
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r->id.tcpdiag_dst[0] = inet->daddr;
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#ifdef CONFIG_IP_TCPDIAG_IPV6
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
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if (r->tcpdiag_family == AF_INET6) {
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struct ipv6_pinfo *np = inet6_sk(sk);
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@ -196,19 +200,6 @@ nlmsg_failure:
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return -1;
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}
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#ifdef CONFIG_IP_TCPDIAG_IPV6
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extern struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
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struct in6_addr *daddr, u16 dport,
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int dif);
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#else
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static inline struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
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struct in6_addr *daddr, u16 dport,
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int dif)
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{
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return NULL;
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}
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#endif
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static int tcpdiag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
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{
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int err;
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@ -225,11 +216,14 @@ static int tcpdiag_get_exact(struct sk_buff *in_skb, const struct nlmsghdr *nlh)
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req->id.tcpdiag_dport, req->id.tcpdiag_src[0],
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req->id.tcpdiag_sport, req->id.tcpdiag_if);
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}
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#ifdef CONFIG_IP_TCPDIAG_IPV6
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
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else if (req->tcpdiag_family == AF_INET6) {
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sk = tcp_v6_lookup((struct in6_addr*)req->id.tcpdiag_dst, req->id.tcpdiag_dport,
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(struct in6_addr*)req->id.tcpdiag_src, req->id.tcpdiag_sport,
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req->id.tcpdiag_if);
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sk = inet6_lookup(hashinfo,
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(struct in6_addr*)req->id.tcpdiag_dst,
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req->id.tcpdiag_dport,
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(struct in6_addr*)req->id.tcpdiag_src,
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req->id.tcpdiag_sport,
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req->id.tcpdiag_if);
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}
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#endif
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else {
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@ -440,7 +434,7 @@ static int tcpdiag_dump_sock(struct sk_buff *skb, struct sock *sk,
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struct inet_sock *inet = inet_sk(sk);
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entry.family = sk->sk_family;
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#ifdef CONFIG_IP_TCPDIAG_IPV6
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
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if (entry.family == AF_INET6) {
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struct ipv6_pinfo *np = inet6_sk(sk);
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@ -502,7 +496,7 @@ static int tcpdiag_fill_req(struct sk_buff *skb, struct sock *sk,
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r->tcpdiag_wqueue = 0;
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r->tcpdiag_uid = sock_i_uid(sk);
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r->tcpdiag_inode = 0;
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#ifdef CONFIG_IP_TCPDIAG_IPV6
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
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if (r->tcpdiag_family == AF_INET6) {
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ipv6_addr_copy((struct in6_addr *)r->id.tcpdiag_src,
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&tcp6_rsk(req)->loc_addr);
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@ -567,13 +561,13 @@ static int tcpdiag_dump_reqs(struct sk_buff *skb, struct sock *sk,
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if (bc) {
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entry.saddr =
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#ifdef CONFIG_IP_TCPDIAG_IPV6
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
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(entry.family == AF_INET6) ?
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tcp6_rsk(req)->loc_addr.s6_addr32 :
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#endif
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&ireq->loc_addr;
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entry.daddr =
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#ifdef CONFIG_IP_TCPDIAG_IPV6
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#if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
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(entry.family == AF_INET6) ?
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tcp6_rsk(req)->rmt_addr.s6_addr32 :
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#endif
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@ -76,26 +76,27 @@ static struct tcp_func ipv6_mapped;
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static struct tcp_func ipv6_specific;
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/* I have no idea if this is a good hash for v6 or not. -DaveM */
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static __inline__ int tcp_v6_hashfn(struct in6_addr *laddr, u16 lport,
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struct in6_addr *faddr, u16 fport)
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static inline int inet6_ehashfn(const struct in6_addr *laddr, const u16 lport,
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const struct in6_addr *faddr, const u16 fport,
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const int ehash_size)
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{
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int hashent = (lport ^ fport);
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hashent ^= (laddr->s6_addr32[3] ^ faddr->s6_addr32[3]);
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hashent ^= hashent>>16;
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hashent ^= hashent>>8;
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return (hashent & (tcp_hashinfo.ehash_size - 1));
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return (hashent & (ehash_size - 1));
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}
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static __inline__ int tcp_v6_sk_hashfn(struct sock *sk)
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static inline int inet6_sk_ehashfn(const struct sock *sk, const int ehash_size)
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{
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struct inet_sock *inet = inet_sk(sk);
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct in6_addr *laddr = &np->rcv_saddr;
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struct in6_addr *faddr = &np->daddr;
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__u16 lport = inet->num;
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__u16 fport = inet->dport;
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return tcp_v6_hashfn(laddr, lport, faddr, fport);
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const struct inet_sock *inet = inet_sk(sk);
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const struct ipv6_pinfo *np = inet6_sk(sk);
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const struct in6_addr *laddr = &np->rcv_saddr;
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const struct in6_addr *faddr = &np->daddr;
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const __u16 lport = inet->num;
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const __u16 fport = inet->dport;
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return inet6_ehashfn(laddr, lport, faddr, fport, ehash_size);
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}
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static inline int tcp_v6_bind_conflict(const struct sock *sk,
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@ -231,7 +232,7 @@ static __inline__ void __tcp_v6_hash(struct sock *sk)
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lock = &tcp_hashinfo.lhash_lock;
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inet_listen_wlock(&tcp_hashinfo);
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} else {
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sk->sk_hashent = tcp_v6_sk_hashfn(sk);
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sk->sk_hashent = inet6_sk_ehashfn(sk, tcp_hashinfo.ehash_size);
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list = &tcp_hashinfo.ehash[sk->sk_hashent].chain;
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lock = &tcp_hashinfo.ehash[sk->sk_hashent].lock;
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write_lock(lock);
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@ -258,7 +259,10 @@ static void tcp_v6_hash(struct sock *sk)
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}
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}
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static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned short hnum, int dif)
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static struct sock *inet6_lookup_listener(struct inet_hashinfo *hashinfo,
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const struct in6_addr *daddr,
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const unsigned short hnum,
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const int dif)
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{
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struct sock *sk;
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struct hlist_node *node;
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@ -266,8 +270,8 @@ static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned shor
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int score, hiscore;
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hiscore=0;
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read_lock(&tcp_hashinfo.lhash_lock);
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sk_for_each(sk, node, &tcp_hashinfo.listening_hash[inet_lhashfn(hnum)]) {
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read_lock(&hashinfo->lhash_lock);
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sk_for_each(sk, node, &hashinfo->listening_hash[inet_lhashfn(hnum)]) {
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if (inet_sk(sk)->num == hnum && sk->sk_family == PF_INET6) {
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struct ipv6_pinfo *np = inet6_sk(sk);
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@ -294,7 +298,7 @@ static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned shor
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}
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if (result)
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sock_hold(result);
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read_unlock(&tcp_hashinfo.lhash_lock);
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read_unlock(&hashinfo->lhash_lock);
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return result;
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}
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@ -304,9 +308,13 @@ static struct sock *tcp_v6_lookup_listener(struct in6_addr *daddr, unsigned shor
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* The sockhash lock must be held as a reader here.
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*/
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static inline struct sock *__tcp_v6_lookup_established(struct in6_addr *saddr, u16 sport,
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struct in6_addr *daddr, u16 hnum,
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int dif)
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static inline struct sock *
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__inet6_lookup_established(struct inet_hashinfo *hashinfo,
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const struct in6_addr *saddr,
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const u16 sport,
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const struct in6_addr *daddr,
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const u16 hnum,
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const int dif)
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{
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struct sock *sk;
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const struct hlist_node *node;
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@ -314,8 +322,9 @@ static inline struct sock *__tcp_v6_lookup_established(struct in6_addr *saddr, u
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/* Optimize here for direct hit, only listening connections can
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* have wildcards anyways.
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*/
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const int hash = tcp_v6_hashfn(daddr, hnum, saddr, sport);
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struct inet_ehash_bucket *head = &tcp_hashinfo.ehash[hash];
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const int hash = inet6_ehashfn(daddr, hnum, saddr, sport,
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hashinfo->ehash_size);
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struct inet_ehash_bucket *head = &hashinfo->ehash[hash];
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read_lock(&head->lock);
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sk_for_each(sk, node, &head->chain) {
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@ -324,7 +333,7 @@ static inline struct sock *__tcp_v6_lookup_established(struct in6_addr *saddr, u
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goto hit; /* You sunk my battleship! */
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}
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/* Must check for a TIME_WAIT'er before going to listener hash. */
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sk_for_each(sk, node, &(head + tcp_hashinfo.ehash_size)->chain) {
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sk_for_each(sk, node, &(head + hashinfo->ehash_size)->chain) {
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const struct inet_timewait_sock *tw = inet_twsk(sk);
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if(*((__u32 *)&(tw->tw_dport)) == ports &&
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@ -347,34 +356,36 @@ hit:
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}
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static inline struct sock *__tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
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struct in6_addr *daddr, u16 hnum,
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int dif)
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static inline struct sock *__inet6_lookup(struct inet_hashinfo *hashinfo,
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const struct in6_addr *saddr,
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const u16 sport,
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const struct in6_addr *daddr,
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const u16 hnum,
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const int dif)
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{
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struct sock *sk;
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sk = __tcp_v6_lookup_established(saddr, sport, daddr, hnum, dif);
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struct sock *sk = __inet6_lookup_established(hashinfo, saddr, sport,
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daddr, hnum, dif);
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if (sk)
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return sk;
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return tcp_v6_lookup_listener(daddr, hnum, dif);
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return inet6_lookup_listener(hashinfo, daddr, hnum, dif);
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}
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inline struct sock *tcp_v6_lookup(struct in6_addr *saddr, u16 sport,
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struct in6_addr *daddr, u16 dport,
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int dif)
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inline struct sock *inet6_lookup(struct inet_hashinfo *hashinfo,
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const struct in6_addr *saddr, const u16 sport,
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const struct in6_addr *daddr, const u16 dport,
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const int dif)
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{
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struct sock *sk;
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local_bh_disable();
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sk = __tcp_v6_lookup(saddr, sport, daddr, ntohs(dport), dif);
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sk = __inet6_lookup(hashinfo, saddr, sport, daddr, ntohs(dport), dif);
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local_bh_enable();
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return sk;
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}
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EXPORT_SYMBOL_GPL(tcp_v6_lookup);
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EXPORT_SYMBOL_GPL(inet6_lookup);
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/*
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@ -454,16 +465,17 @@ static __u32 tcp_v6_init_sequence(struct sock *sk, struct sk_buff *skb)
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}
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}
|
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|
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static int __tcp_v6_check_established(struct sock *sk, __u16 lport,
|
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static int __tcp_v6_check_established(struct sock *sk, const __u16 lport,
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struct inet_timewait_sock **twp)
|
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{
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struct inet_sock *inet = inet_sk(sk);
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struct ipv6_pinfo *np = inet6_sk(sk);
|
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struct in6_addr *daddr = &np->rcv_saddr;
|
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struct in6_addr *saddr = &np->daddr;
|
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int dif = sk->sk_bound_dev_if;
|
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const struct ipv6_pinfo *np = inet6_sk(sk);
|
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const struct in6_addr *daddr = &np->rcv_saddr;
|
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const struct in6_addr *saddr = &np->daddr;
|
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const int dif = sk->sk_bound_dev_if;
|
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const u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
|
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const int hash = tcp_v6_hashfn(daddr, inet->num, saddr, inet->dport);
|
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const int hash = inet6_ehashfn(daddr, inet->num, saddr, inet->dport,
|
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tcp_hashinfo.ehash_size);
|
||||
struct inet_ehash_bucket *head = &tcp_hashinfo.ehash[hash];
|
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struct sock *sk2;
|
||||
const struct hlist_node *node;
|
||||
|
|
@ -637,11 +649,6 @@ out:
|
|||
}
|
||||
}
|
||||
|
||||
static __inline__ int tcp_v6_iif(struct sk_buff *skb)
|
||||
{
|
||||
return IP6CB(skb)->iif;
|
||||
}
|
||||
|
||||
static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
|
||||
int addr_len)
|
||||
{
|
||||
|
|
@ -833,14 +840,15 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
|
|||
int type, int code, int offset, __u32 info)
|
||||
{
|
||||
struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data;
|
||||
struct tcphdr *th = (struct tcphdr *)(skb->data+offset);
|
||||
const struct tcphdr *th = (struct tcphdr *)(skb->data+offset);
|
||||
struct ipv6_pinfo *np;
|
||||
struct sock *sk;
|
||||
int err;
|
||||
struct tcp_sock *tp;
|
||||
__u32 seq;
|
||||
|
||||
sk = tcp_v6_lookup(&hdr->daddr, th->dest, &hdr->saddr, th->source, skb->dev->ifindex);
|
||||
sk = inet6_lookup(&tcp_hashinfo, &hdr->daddr, th->dest, &hdr->saddr,
|
||||
th->source, skb->dev->ifindex);
|
||||
|
||||
if (sk == NULL) {
|
||||
ICMP6_INC_STATS_BH(__in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
|
||||
|
|
@ -927,7 +935,7 @@ static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
|
|||
goto out;
|
||||
|
||||
req = tcp_v6_search_req(sk, &prev, th->dest, &hdr->daddr,
|
||||
&hdr->saddr, tcp_v6_iif(skb));
|
||||
&hdr->saddr, inet6_iif(skb));
|
||||
if (!req)
|
||||
goto out;
|
||||
|
||||
|
|
@ -1138,7 +1146,7 @@ static void tcp_v6_send_reset(struct sk_buff *skb)
|
|||
buff->csum);
|
||||
|
||||
fl.proto = IPPROTO_TCP;
|
||||
fl.oif = tcp_v6_iif(skb);
|
||||
fl.oif = inet6_iif(skb);
|
||||
fl.fl_ip_dport = t1->dest;
|
||||
fl.fl_ip_sport = t1->source;
|
||||
|
||||
|
|
@ -1207,7 +1215,7 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32
|
|||
buff->csum);
|
||||
|
||||
fl.proto = IPPROTO_TCP;
|
||||
fl.oif = tcp_v6_iif(skb);
|
||||
fl.oif = inet6_iif(skb);
|
||||
fl.fl_ip_dport = t1->dest;
|
||||
fl.fl_ip_sport = t1->source;
|
||||
|
||||
|
|
@ -1245,20 +1253,18 @@ static void tcp_v6_reqsk_send_ack(struct sk_buff *skb, struct request_sock *req)
|
|||
static struct sock *tcp_v6_hnd_req(struct sock *sk,struct sk_buff *skb)
|
||||
{
|
||||
struct request_sock *req, **prev;
|
||||
struct tcphdr *th = skb->h.th;
|
||||
const struct tcphdr *th = skb->h.th;
|
||||
struct sock *nsk;
|
||||
|
||||
/* Find possible connection requests. */
|
||||
req = tcp_v6_search_req(sk, &prev, th->source, &skb->nh.ipv6h->saddr,
|
||||
&skb->nh.ipv6h->daddr, tcp_v6_iif(skb));
|
||||
&skb->nh.ipv6h->daddr, inet6_iif(skb));
|
||||
if (req)
|
||||
return tcp_check_req(sk, skb, req, prev);
|
||||
|
||||
nsk = __tcp_v6_lookup_established(&skb->nh.ipv6h->saddr,
|
||||
th->source,
|
||||
&skb->nh.ipv6h->daddr,
|
||||
ntohs(th->dest),
|
||||
tcp_v6_iif(skb));
|
||||
nsk = __inet6_lookup_established(&tcp_hashinfo, &skb->nh.ipv6h->saddr,
|
||||
th->source, &skb->nh.ipv6h->daddr,
|
||||
ntohs(th->dest), inet6_iif(skb));
|
||||
|
||||
if (nsk) {
|
||||
if (nsk->sk_state != TCP_TIME_WAIT) {
|
||||
|
|
@ -1346,7 +1352,7 @@ static int tcp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
|
|||
/* So that link locals have meaning */
|
||||
if (!sk->sk_bound_dev_if &&
|
||||
ipv6_addr_type(&treq->rmt_addr) & IPV6_ADDR_LINKLOCAL)
|
||||
treq->iif = tcp_v6_iif(skb);
|
||||
treq->iif = inet6_iif(skb);
|
||||
|
||||
if (isn == 0)
|
||||
isn = tcp_v6_init_sequence(sk,skb);
|
||||
|
|
@ -1411,7 +1417,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
|
|||
newsk->sk_backlog_rcv = tcp_v4_do_rcv;
|
||||
newnp->pktoptions = NULL;
|
||||
newnp->opt = NULL;
|
||||
newnp->mcast_oif = tcp_v6_iif(skb);
|
||||
newnp->mcast_oif = inet6_iif(skb);
|
||||
newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
|
||||
|
||||
/*
|
||||
|
|
@ -1516,7 +1522,7 @@ static struct sock * tcp_v6_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
|
|||
skb_set_owner_r(newnp->pktoptions, newsk);
|
||||
}
|
||||
newnp->opt = NULL;
|
||||
newnp->mcast_oif = tcp_v6_iif(skb);
|
||||
newnp->mcast_oif = inet6_iif(skb);
|
||||
newnp->mcast_hops = skb->nh.ipv6h->hop_limit;
|
||||
|
||||
/* Clone native IPv6 options from listening socket (if any)
|
||||
|
|
@ -1691,7 +1697,7 @@ ipv6_pktoptions:
|
|||
if (TCP_SKB_CB(opt_skb)->end_seq == tp->rcv_nxt &&
|
||||
!((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))) {
|
||||
if (np->rxopt.bits.rxinfo)
|
||||
np->mcast_oif = tcp_v6_iif(opt_skb);
|
||||
np->mcast_oif = inet6_iif(opt_skb);
|
||||
if (np->rxopt.bits.rxhlim)
|
||||
np->mcast_hops = opt_skb->nh.ipv6h->hop_limit;
|
||||
if (ipv6_opt_accepted(sk, opt_skb)) {
|
||||
|
|
@ -1746,8 +1752,9 @@ static int tcp_v6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
|
|||
TCP_SKB_CB(skb)->flags = ipv6_get_dsfield(skb->nh.ipv6h);
|
||||
TCP_SKB_CB(skb)->sacked = 0;
|
||||
|
||||
sk = __tcp_v6_lookup(&skb->nh.ipv6h->saddr, th->source,
|
||||
&skb->nh.ipv6h->daddr, ntohs(th->dest), tcp_v6_iif(skb));
|
||||
sk = __inet6_lookup(&tcp_hashinfo, &skb->nh.ipv6h->saddr, th->source,
|
||||
&skb->nh.ipv6h->daddr, ntohs(th->dest),
|
||||
inet6_iif(skb));
|
||||
|
||||
if (!sk)
|
||||
goto no_tcp_socket;
|
||||
|
|
@ -1818,7 +1825,9 @@ do_time_wait:
|
|||
{
|
||||
struct sock *sk2;
|
||||
|
||||
sk2 = tcp_v6_lookup_listener(&skb->nh.ipv6h->daddr, ntohs(th->dest), tcp_v6_iif(skb));
|
||||
sk2 = inet6_lookup_listener(&tcp_hashinfo,
|
||||
&skb->nh.ipv6h->daddr,
|
||||
ntohs(th->dest), inet6_iif(skb));
|
||||
if (sk2 != NULL) {
|
||||
struct inet_timewait_sock *tw = inet_twsk(sk);
|
||||
inet_twsk_deschedule(tw, &tcp_death_row);
|
||||
|
|
|
|||
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