* 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>
return tb;
}
-EXPORT_SYMBOL(inet_bind_bucket_create);
-
/*
* Caller must hold hashbucket lock for this tb with local BH disabled
*/
inet_csk(sk)->icsk_bind_hash = tb;
}
-EXPORT_SYMBOL(inet_bind_hash);
-
/*
* Get rid of any references to a local port held by the given sock.
*/
* 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 u32 daddr,
+ const unsigned short hnum,
+ const int dif)
{
struct sock *result = NULL, *sk;
const struct hlist_node *node;
return result;
}
+/* 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_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 */
spin_unlock(&head->lock);
if (tw) {
- inet_twsk_deschedule(tw, death_row);;
+ inet_twsk_deschedule(tw, death_row);
inet_twsk_put(tw);
}