misc: nct1008: change overheat enable message
[linux-3.10.git] / include / net / inet6_hashtables.h
1 /*
2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
3  *              operating system.  INET is implemented using the BSD Socket
4  *              interface as the means of communication with the user level.
5  *
6  * Authors:     Lotsa people, from code originally in tcp
7  *
8  *      This program is free software; you can redistribute it and/or
9  *      modify it under the terms of the GNU General Public License
10  *      as published by the Free Software Foundation; either version
11  *      2 of the License, or (at your option) any later version.
12  */
13
14 #ifndef _INET6_HASHTABLES_H
15 #define _INET6_HASHTABLES_H
16
17
18 #if IS_ENABLED(CONFIG_IPV6)
19 #include <linux/in6.h>
20 #include <linux/ipv6.h>
21 #include <linux/types.h>
22 #include <linux/jhash.h>
23
24 #include <net/inet_sock.h>
25
26 #include <net/ipv6.h>
27 #include <net/netns/hash.h>
28
29 struct inet_hashinfo;
30
31 static inline unsigned int inet6_ehashfn(struct net *net,
32                                 const struct in6_addr *laddr, const u16 lport,
33                                 const struct in6_addr *faddr, const __be16 fport)
34 {
35         u32 ports = (((u32)lport) << 16) | (__force u32)fport;
36
37         return jhash_3words((__force u32)laddr->s6_addr32[3],
38                             ipv6_addr_jhash(faddr),
39                             ports,
40                             inet_ehash_secret + net_hash_mix(net));
41 }
42
43 static inline int inet6_sk_ehashfn(const struct sock *sk)
44 {
45         const struct inet_sock *inet = inet_sk(sk);
46         const struct ipv6_pinfo *np = inet6_sk(sk);
47         const struct in6_addr *laddr = &np->rcv_saddr;
48         const struct in6_addr *faddr = &np->daddr;
49         const __u16 lport = inet->inet_num;
50         const __be16 fport = inet->inet_dport;
51         struct net *net = sock_net(sk);
52
53         return inet6_ehashfn(net, laddr, lport, faddr, fport);
54 }
55
56 extern int __inet6_hash(struct sock *sk, struct inet_timewait_sock *twp);
57
58 /*
59  * Sockets in TCP_CLOSE state are _always_ taken out of the hash, so
60  * we need not check it for TCP lookups anymore, thanks Alexey. -DaveM
61  *
62  * The sockhash lock must be held as a reader here.
63  */
64 extern struct sock *__inet6_lookup_established(struct net *net,
65                                            struct inet_hashinfo *hashinfo,
66                                            const struct in6_addr *saddr,
67                                            const __be16 sport,
68                                            const struct in6_addr *daddr,
69                                            const u16 hnum,
70                                            const int dif);
71
72 extern struct sock *inet6_lookup_listener(struct net *net,
73                                           struct inet_hashinfo *hashinfo,
74                                           const struct in6_addr *saddr,
75                                           const __be16 sport,
76                                           const struct in6_addr *daddr,
77                                           const unsigned short hnum,
78                                           const int dif);
79
80 static inline struct sock *__inet6_lookup(struct net *net,
81                                           struct inet_hashinfo *hashinfo,
82                                           const struct in6_addr *saddr,
83                                           const __be16 sport,
84                                           const struct in6_addr *daddr,
85                                           const u16 hnum,
86                                           const int dif)
87 {
88         struct sock *sk = __inet6_lookup_established(net, hashinfo, saddr,
89                                                 sport, daddr, hnum, dif);
90         if (sk)
91                 return sk;
92
93         return inet6_lookup_listener(net, hashinfo, saddr, sport,
94                                      daddr, hnum, dif);
95 }
96
97 static inline struct sock *__inet6_lookup_skb(struct inet_hashinfo *hashinfo,
98                                               struct sk_buff *skb,
99                                               const __be16 sport,
100                                               const __be16 dport)
101 {
102         struct sock *sk = skb_steal_sock(skb);
103
104         if (sk)
105                 return sk;
106
107         return __inet6_lookup(dev_net(skb_dst(skb)->dev), hashinfo,
108                               &ipv6_hdr(skb)->saddr, sport,
109                               &ipv6_hdr(skb)->daddr, ntohs(dport),
110                               inet6_iif(skb));
111 }
112
113 extern struct sock *inet6_lookup(struct net *net, struct inet_hashinfo *hashinfo,
114                                  const struct in6_addr *saddr, const __be16 sport,
115                                  const struct in6_addr *daddr, const __be16 dport,
116                                  const int dif);
117 #endif /* IS_ENABLED(CONFIG_IPV6) */
118 #endif /* _INET6_HASHTABLES_H */