[IPV4]: Uninline inet_lookup_listener
By modern standards this function is way too big to be inlined. It's
even bigger than __inet_lookup_listener :)
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 95fac55..bfc39066 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -124,8 +124,10 @@
* remote address for the connection. So always assume those are both
* wildcarded during the search since they can never be otherwise.
*/
-struct sock *__inet_lookup_listener(const struct hlist_head *head, const u32 daddr,
- const unsigned short hnum, const int dif)
+static struct sock *__inet_lookup_listener(const struct hlist_head *head,
+ const u32 daddr,
+ const unsigned short hnum,
+ const int dif)
{
struct sock *result = NULL, *sk;
const struct hlist_node *node;
@@ -159,7 +161,34 @@
return result;
}
-EXPORT_SYMBOL_GPL(__inet_lookup_listener);
+/* Optimize the common listener case. */
+struct sock *inet_lookup_listener(struct inet_hashinfo *hashinfo,
+ const u32 daddr, const unsigned short hnum,
+ const int dif)
+{
+ struct sock *sk = NULL;
+ const struct hlist_head *head;
+
+ read_lock(&hashinfo->lhash_lock);
+ head = &hashinfo->listening_hash[inet_lhashfn(hnum)];
+ if (!hlist_empty(head)) {
+ const struct inet_sock *inet = inet_sk((sk = __sk_head(head)));
+
+ if (inet->num == hnum && !sk->sk_node.next &&
+ (!inet->rcv_saddr || inet->rcv_saddr == daddr) &&
+ (sk->sk_family == PF_INET || !ipv6_only_sock(sk)) &&
+ !sk->sk_bound_dev_if)
+ goto sherry_cache;
+ sk = __inet_lookup_listener(head, daddr, hnum, dif);
+ }
+ if (sk) {
+sherry_cache:
+ sock_hold(sk);
+ }
+ read_unlock(&hashinfo->lhash_lock);
+ return sk;
+}
+EXPORT_SYMBOL_GPL(inet_lookup_listener);
/* called with local bh disabled */
static int __inet_check_established(struct inet_timewait_death_row *death_row,
