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author | Jeff Garzik <jeff@garzik.org> | 2006-09-24 01:52:47 -0400 |
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committer | Jeff Garzik <jeff@garzik.org> | 2006-09-24 01:52:47 -0400 |
commit | 23930fa1cebfea6f79881c588ccd1b0781e49e3f (patch) | |
tree | 36d29e3f83661c4f5f45b6f74ac0d5f9886867a8 /net/ipv4/inet_hashtables.c | |
parent | 36b35a5be0e4b406acd816e2122d153e875105be (diff) | |
parent | 4f5537de7c1531398e84e18a24f667e49cc94208 (diff) | |
download | kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.zip kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.tar.gz kernel_samsung_smdk4412-23930fa1cebfea6f79881c588ccd1b0781e49e3f.tar.bz2 |
Merge branch 'master' into upstream
Diffstat (limited to 'net/ipv4/inet_hashtables.c')
-rw-r--r-- | net/ipv4/inet_hashtables.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c index 95fac55..fb296c9 100644 --- a/net/ipv4/inet_hashtables.c +++ b/net/ipv4/inet_hashtables.c @@ -124,8 +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 u32 daddr, + const unsigned short hnum, + const int dif) { struct sock *result = NULL, *sk; const struct hlist_node *node; @@ -159,6 +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 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 */ |