inet: add struct net argument to inet_ehashfn

Although this hash takes addresses into account, the ehash chains
can also be too long when, for instance, communications via lo occur.
So, prepare the inet_hashfn to take struct net into account.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 7 insertions, 5 deletions

diff --git a/include/net/inet_sock.h b/include/net/inet_sock.h
index 9fabe5b38912..85bb420c5d86 100644
--- a/include/net/inet_sock.h
+++ b/include/net/inet_sock.h
@@ -171,7 +171,8 @@ extern int inet_sk_rebuild_header(struct sock *sk);
 extern u32 inet_ehash_secret;
 extern void build_ehash_secret(void);
 
-static inline unsigned int inet_ehashfn(const __be32 laddr, const __u16 lport,
+static inline unsigned int inet_ehashfn(struct net *net,
+                                        const __be32 laddr, const __u16 lport,
                                         const __be32 faddr, const __be16 fport)
 {
         return jhash_3words((__force __u32) laddr,
@@ -187,8 +188,9 @@ static inline int inet_sk_ehashfn(const struct sock *sk)
         const __u16 lport = inet->num;
         const __be32 faddr = inet->daddr;
         const __be16 fport = inet->dport;
+        struct net *net = sock_net(sk);
 
-        return inet_ehashfn(laddr, lport, faddr, fport);
+        return inet_ehashfn(net, laddr, lport, faddr, fport);
 }
 
 
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 4f597b3175e7..eca5899729e3 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -227,7 +227,7 @@ struct sock * __inet_lookup_established(struct net *net,
         /* Optimize here for direct hit, only listening connections can
          * have wildcards anyways.
          */
-        unsigned int hash = inet_ehashfn(daddr, hnum, saddr, sport);
+        unsigned int hash = inet_ehashfn(net, daddr, hnum, saddr, sport);
         struct inet_ehash_bucket *head = inet_ehash_bucket(hashinfo, hash);
         rwlock_t *lock = inet_ehash_lockp(hashinfo, hash);
 
@@ -267,13 +267,13 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
         int dif = sk->sk_bound_dev_if;
         INET_ADDR_COOKIE(acookie, saddr, daddr)
         const __portpair ports = INET_COMBINED_PORTS(inet->dport, lport);
-        unsigned int hash = inet_ehashfn(daddr, lport, saddr, inet->dport);
+        struct net *net = sock_net(sk);
+        unsigned int hash = inet_ehashfn(net, daddr, lport, saddr, inet->dport);
         struct inet_ehash_bucket *head = inet_ehash_bucket(hinfo, hash);
         rwlock_t *lock = inet_ehash_lockp(hinfo, hash);
         struct sock *sk2;
         const struct hlist_node *node;
         struct inet_timewait_sock *tw;
-        struct net *net = sock_net(sk);
 
         prefetch(head->chain.first);
         write_lock(lock);