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>

1 files changed, 6 insertions, 11 deletions

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 330a08bcd1c1..3a86dfd7ae33 100644
--- 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);