4297a0ef08
Add a second device index, sdif, to inet6 socket lookups. sdif is the index for ingress devices enslaved to an l3mdev. It allows the lookups to consider the enslaved device as well as the L3 domain when searching for a socket. TCP moves the data in the cb. Prior to tcp_v4_rcv (e.g., early demux) the ingress index is obtained from IPCB using inet_sdif and after tcp_v4_rcv tcp_v4_sdif is used. Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/*
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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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#if IS_ENABLED(CONFIG_IPV6)
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#include <linux/in6.h>
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#include <linux/ipv6.h>
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#include <linux/types.h>
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#include <linux/jhash.h>
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#include <net/inet_sock.h>
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#include <net/ipv6.h>
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#include <net/netns/hash.h>
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struct inet_hashinfo;
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static inline unsigned int __inet6_ehashfn(const u32 lhash,
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const u16 lport,
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const u32 fhash,
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const __be16 fport,
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const u32 initval)
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{
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const u32 ports = (((u32)lport) << 16) | (__force u32)fport;
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return jhash_3words(lhash, fhash, ports, initval);
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}
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/*
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* Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
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* we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
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*
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* The sockhash lock must be held as a reader here.
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*/
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struct sock *__inet6_lookup_established(struct net *net,
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struct inet_hashinfo *hashinfo,
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const struct in6_addr *saddr,
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const __be16 sport,
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const struct in6_addr *daddr,
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const u16 hnum, const int dif,
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const int sdif);
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struct sock *inet6_lookup_listener(struct net *net,
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struct inet_hashinfo *hashinfo,
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struct sk_buff *skb, int doff,
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const struct in6_addr *saddr,
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const __be16 sport,
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const struct in6_addr *daddr,
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const unsigned short hnum,
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const int dif, const int sdif);
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static inline struct sock *__inet6_lookup(struct net *net,
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struct inet_hashinfo *hashinfo,
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struct sk_buff *skb, int doff,
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const struct in6_addr *saddr,
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const __be16 sport,
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const struct in6_addr *daddr,
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const u16 hnum,
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const int dif, const int sdif,
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bool *refcounted)
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{
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struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr,
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sport, daddr, hnum,
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dif, sdif);
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*refcounted = true;
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if (sk)
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return sk;
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*refcounted = false;
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return inet6_lookup_listener(net, hashinfo, skb, doff, saddr, sport,
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daddr, hnum, dif, sdif);
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}
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static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
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struct sk_buff *skb, int doff,
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const __be16 sport,
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const __be16 dport,
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int iif, int sdif,
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bool *refcounted)
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{
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struct sock *sk = skb_steal_sock(skb);
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*refcounted = true;
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if (sk)
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return sk;
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return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo, skb,
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doff, &ipv6_hdr(skb)->saddr, sport,
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&ipv6_hdr(skb)->daddr, ntohs(dport),
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iif, sdif, refcounted);
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}
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struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
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struct sk_buff *skb, int doff,
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const struct in6_addr *saddr, const __be16 sport,
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const struct in6_addr *daddr, const __be16 dport,
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const int dif);
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int inet6_hash(struct sock *sk);
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#endif /* IS_ENABLED(CONFIG_IPV6) */
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#define INET6_MATCH(__sk, __net, __saddr, __daddr, __ports, __dif, __sdif) \
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(((__sk)->sk_portpair == (__ports)) && \
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((__sk)->sk_family == AF_INET6) && \
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ipv6_addr_equal(&(__sk)->sk_v6_daddr, (__saddr)) && \
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ipv6_addr_equal(&(__sk)->sk_v6_rcv_saddr, (__daddr)) && \
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(!(__sk)->sk_bound_dev_if || \
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((__sk)->sk_bound_dev_if == (__dif)) || \
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((__sk)->sk_bound_dev_if == (__sdif))) && \
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net_eq(sock_net(__sk), (__net)))
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#endif /* _INET6_HASHTABLES_H */
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