[NETFILTER]: New connection tracking is not EXPERIMENTAL anymore

[linux.git] / net / ipv4 / inet_hashtables.c

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index ee9b5515b9aea20fb28d61be5aedc04321f20676..8c79c8a4ea5c2e2daee5f9184d2401ddd60b3192 100644 (file)
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -13,7 +13,6 @@
  *      2 of the License, or (at your option) any later version.
  */
 
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/random.h>
 #include <linux/sched.h>
@@ -28,11 +27,11 @@
  * Allocate and initialize a new local port bind bucket.
  * The bindhash mutex for snum's hash chain must be held here.
  */
-struct inet_bind_bucket *inet_bind_bucket_create(kmem_cache_t *cachep,
+struct inet_bind_bucket *inet_bind_bucket_create(struct kmem_cache *cachep,
                                                 struct inet_bind_hashbucket *head,
                                                 const unsigned short snum)
 {
-       struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, SLAB_ATOMIC);
+       struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, GFP_ATOMIC);
 
        if (tb != NULL) {
                tb->port      = snum;
@@ -46,7 +45,7 @@ struct inet_bind_bucket *inet_bind_bucket_create(kmem_cache_t *cachep,
 /*
  * Caller must hold hashbucket lock for this tb with local BH disabled
  */
-void inet_bind_bucket_destroy(kmem_cache_t *cachep, struct inet_bind_bucket *tb)
+void inet_bind_bucket_destroy(struct kmem_cache *cachep, struct inet_bind_bucket *tb)
 {
        if (hlist_empty(&tb->owners)) {
                __hlist_del(&tb->node);
@@ -125,8 +124,10 @@ EXPORT_SYMBOL(inet_listen_wlock);
  * 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_slow(const struct hlist_head *head,
+                                             const __be32 daddr,
+                                             const unsigned short hnum,
+                                             const int dif)
 {
        struct sock *result = NULL, *sk;
        const struct hlist_node *node;
@@ -136,7 +137,7 @@ struct sock *__inet_lookup_listener(const struct hlist_head *head, const u32 dad
                const struct inet_sock *inet = inet_sk(sk);
 
                if (inet->num == hnum && !ipv6_only_sock(sk)) {
-                       const __u32 rcv_saddr = inet->rcv_saddr;
+                       const __be32 rcv_saddr = inet->rcv_saddr;
                        int score = sk->sk_family == PF_INET ? 1 : 0;
 
                        if (rcv_saddr) {
@@ -160,6 +161,33 @@ struct sock *__inet_lookup_listener(const struct hlist_head *head, const u32 dad
        return result;
 }
 
+/* Optimize the common listener case. */
+struct sock *__inet_lookup_listener(struct inet_hashinfo *hashinfo,
+                                   const __be32 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_slow(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 */
@@ -169,11 +197,11 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
 {
        struct inet_hashinfo *hinfo = death_row->hashinfo;
        struct inet_sock *inet = inet_sk(sk);
-       u32 daddr = inet->rcv_saddr;
-       u32 saddr = inet->daddr;
+       __be32 daddr = inet->rcv_saddr;
+       __be32 saddr = inet->daddr;
        int dif = sk->sk_bound_dev_if;
        INET_ADDR_COOKIE(acookie, saddr, daddr)
-       const __u32 ports = INET_COMBINED_PORTS(inet->dport, lport);
+       const __portpair ports = INET_COMBINED_PORTS(inet->dport, lport);
        unsigned int hash = inet_ehashfn(daddr, lport, saddr, inet->dport);
        struct inet_ehash_bucket *head = inet_ehash_bucket(hinfo, hash);
        struct sock *sk2;