net: introduce sk_ehashfn() helper

Goal is to unify IPv4/IPv6 inet_hash handling, and use common helpers
for all kind of sockets (full sockets, timewait and request sockets)

inet_sk_ehashfn() becomes sk_ehashfn() but still only copes with IPv4

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index eb1963a..ef993ef 100644 (file)
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -383,6 +383,8 @@ static inline struct sock *__inet_lookup_skb(struct inet_hashinfo *hashinfo,
                                     iph->daddr, dport, inet_iif(skb));
 }
 
+u32 sk_ehashfn(const struct sock *sk);
+
 int __inet_hash_connect(struct inet_timewait_death_row *death_row,
                        struct sock *sk, u32 port_offset,
                        int (*check_established)(struct inet_timewait_death_row *,

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 330a08b..3a86dfd 100644 (file)
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -37,16 +37,11 @@ static u32 inet_ehashfn(const struct net *net, const __be32 laddr,
 }
 
 
-static unsigned int inet_sk_ehashfn(const struct sock *sk)
+u32 sk_ehashfn(const struct sock *sk)
 {
-       const struct inet_sock *inet = inet_sk(sk);
-       const __be32 laddr = inet->inet_rcv_saddr;
-       const __u16 lport = inet->inet_num;
-       const __be32 faddr = inet->inet_daddr;
-       const __be16 fport = inet->inet_dport;
-       struct net *net = sock_net(sk);
-
-       return inet_ehashfn(net, laddr, lport, faddr, fport);
+       return inet_ehashfn(sock_net(sk),
+                           sk->sk_rcv_saddr, sk->sk_num,
+                           sk->sk_daddr, sk->sk_dport);
 }
 
 /*
@@ -407,13 +402,13 @@ int __inet_hash_nolisten(struct sock *sk, struct inet_timewait_sock *tw)
 {
        struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
        struct hlist_nulls_head *list;
-       spinlock_t *lock;
        struct inet_ehash_bucket *head;
+       spinlock_t *lock;
        int twrefcnt = 0;
 
        WARN_ON(!sk_unhashed(sk));
 
-       sk->sk_hash = inet_sk_ehashfn(sk);
+       sk->sk_hash = sk_ehashfn(sk);
        head = inet_ehash_bucket(hashinfo, sk->sk_hash);
        list = &head->chain;
        lock = inet_ehash_lockp(hashinfo, sk->sk_hash);