From 77a5ba55dab7b4ece12f37c717022819e3f77b44 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Thu, 20 Dec 2007 15:32:17 -0800 Subject: [INET]: Uninline the __inet_lookup_established function. This is -700 bytes from the net/ipv4/built-in.o add/remove: 1/0 grow/shrink: 1/3 up/down: 340/-1040 (-700) function old new delta __inet_lookup_established - 339 +339 tcp_sacktag_write_queue 2254 2255 +1 tcp_v4_err 1304 973 -331 tcp_v4_rcv 2089 1744 -345 tcp_v4_do_rcv 826 462 -364 Exporting is for dccp module (used via e.g. inet_lookup). Signed-off-by: Pavel Emelyanov Signed-off-by: David S. Miller --- net/ipv4/inet_hashtables.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'net/ipv4/inet_hashtables.c') diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c index 8dfd5a691e5..2e5814a8436 100644 --- a/net/ipv4/inet_hashtables.c +++ b/net/ipv4/inet_hashtables.c @@ -190,6 +190,44 @@ sherry_cache: } EXPORT_SYMBOL_GPL(__inet_lookup_listener); +struct sock * __inet_lookup_established(struct inet_hashinfo *hashinfo, + const __be32 saddr, const __be16 sport, + const __be32 daddr, const u16 hnum, + const int dif) +{ + INET_ADDR_COOKIE(acookie, saddr, daddr) + const __portpair ports = INET_COMBINED_PORTS(sport, hnum); + struct sock *sk; + const struct hlist_node *node; + /* Optimize here for direct hit, only listening connections can + * have wildcards anyways. + */ + unsigned int hash = inet_ehashfn(daddr, hnum, saddr, sport); + struct inet_ehash_bucket *head = inet_ehash_bucket(hashinfo, hash); + rwlock_t *lock = inet_ehash_lockp(hashinfo, hash); + + prefetch(head->chain.first); + read_lock(lock); + sk_for_each(sk, node, &head->chain) { + if (INET_MATCH(sk, hash, acookie, saddr, daddr, ports, dif)) + goto hit; /* You sunk my battleship! */ + } + + /* Must check for a TIME_WAIT'er before going to listener hash. */ + sk_for_each(sk, node, &head->twchain) { + if (INET_TW_MATCH(sk, hash, acookie, saddr, daddr, ports, dif)) + goto hit; + } + sk = NULL; +out: + read_unlock(lock); + return sk; +hit: + sock_hold(sk); + goto out; +} +EXPORT_SYMBOL_GPL(__inet_lookup_established); + /* called with local bh disabled */ static int __inet_check_established(struct inet_timewait_death_row *death_row, struct sock *sk, __u16 lport, -- cgit v1.2.3