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[INET]: Uninline the __inet_hash function. 

This one is used in quite many places in the networking code and
seems to big to be inline.

After the patch net/ipv4/build-in.o loses ~650 bytes:
add/remove: 2/0 grow/shrink: 0/5 up/down: 461/-1114 (-653)
function                                     old     new   delta
__inet_hash_nolisten                           -     282    +282
__inet_hash                                    -     179    +179
tcp_sacktag_write_queue                     2255    2254      -1
__inet_lookup_listener                       284     274     -10
tcp_v4_syn_recv_sock                         755     493    -262
tcp_v4_hash                                  389      35    -354
inet_hash_connect                           1086     599    -487

This version addresses the issue pointed by Eric, that
while being inline this function was optimized by gcc
in respect to the 'listen_possible' argument.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2007-12-20 15:31:33 -08:00 committed by David S. Miller
parent d670119132
commit 152da81deb
4 changed files with 49 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
include/net/inet_hashtables.h
View File

@ -264,37 +264,14 @@ static inline void inet_listen_unlock(struct inet_hashinfo *hashinfo)
wake_up(&hashinfo->lhash_wait);
}
static inline void __inet_hash(struct inet_hashinfo *hashinfo,
struct sock *sk, const int listen_possible)
{
struct hlist_head *list;
rwlock_t *lock;
BUG_TRAP(sk_unhashed(sk));
if (listen_possible && sk->sk_state == TCP_LISTEN) {
list = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
lock = &hashinfo->lhash_lock;
inet_listen_wlock(hashinfo);
} else {
struct inet_ehash_bucket *head;
sk->sk_hash = inet_sk_ehashfn(sk);
head = inet_ehash_bucket(hashinfo, sk->sk_hash);
list = &head->chain;
lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
write_lock(lock);
}
__sk_add_node(sk, list);
sock_prot_inc_use(sk->sk_prot);
write_unlock(lock);
if (listen_possible && sk->sk_state == TCP_LISTEN)
wake_up(&hashinfo->lhash_wait);
}
extern void __inet_hash(struct inet_hashinfo *hashinfo, struct sock *sk);
extern void __inet_hash_nolisten(struct inet_hashinfo *hinfo, struct sock *sk);
static inline void inet_hash(struct inet_hashinfo *hashinfo, struct sock *sk)
{
if (sk->sk_state != TCP_CLOSE) {
local_bh_disable();
__inet_hash(hashinfo, sk, 1);
__inet_hash(hashinfo, sk);
local_bh_enable();
}
}

2
net/dccp/ipv4.c
View File

@ -408,7 +408,7 @@ struct sock *dccp_v4_request_recv_sock(struct sock *sk, struct sk_buff *skb,
dccp_sync_mss(newsk, dst_mtu(dst));
__inet_hash(&dccp_hashinfo, newsk, 0);
__inet_hash_nolisten(&dccp_hashinfo, newsk);
__inet_inherit_port(&dccp_hashinfo, sk, newsk);
return newsk;

46
net/ipv4/inet_hashtables.c
View File

@ -267,6 +267,48 @@ static inline u32 inet_sk_port_offset(const struct sock *sk)
inet->dport);
}
void __inet_hash_nolisten(struct inet_hashinfo *hashinfo, struct sock *sk)
{
struct hlist_head *list;
rwlock_t *lock;
struct inet_ehash_bucket *head;
BUG_TRAP(sk_unhashed(sk));
sk->sk_hash = inet_sk_ehashfn(sk);
head = inet_ehash_bucket(hashinfo, sk->sk_hash);
list = &head->chain;
lock = inet_ehash_lockp(hashinfo, sk->sk_hash);
write_lock(lock);
__sk_add_node(sk, list);
sock_prot_inc_use(sk->sk_prot);
write_unlock(lock);
}
EXPORT_SYMBOL_GPL(__inet_hash_nolisten);
void __inet_hash(struct inet_hashinfo *hashinfo, struct sock *sk)
{
struct hlist_head *list;
rwlock_t *lock;
if (sk->sk_state != TCP_LISTEN) {
__inet_hash_nolisten(hashinfo, sk);
return;
}
BUG_TRAP(sk_unhashed(sk));
list = &hashinfo->listening_hash[inet_sk_listen_hashfn(sk)];
lock = &hashinfo->lhash_lock;
inet_listen_wlock(hashinfo);
__sk_add_node(sk, list);
sock_prot_inc_use(sk->sk_prot);
write_unlock(lock);
wake_up(&hashinfo->lhash_wait);
}
EXPORT_SYMBOL_GPL(__inet_hash);
/*
* Bind a port for a connect operation and hash it.
*/
@ -334,7 +376,7 @@ ok:
inet_bind_hash(sk, tb, port);
if (sk_unhashed(sk)) {
inet_sk(sk)->sport = htons(port);
__inet_hash(hinfo, sk, 0);
__inet_hash_nolisten(hinfo, sk);
}
spin_unlock(&head->lock);
@ -351,7 +393,7 @@ ok:
tb = inet_csk(sk)->icsk_bind_hash;
spin_lock_bh(&head->lock);
if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) {
__inet_hash(hinfo, sk, 0);
__inet_hash_nolisten(hinfo, sk);
spin_unlock_bh(&head->lock);
return 0;
} else {

2
net/ipv4/tcp_ipv4.c
View File

@ -1478,7 +1478,7 @@ struct sock *tcp_v4_syn_recv_sock(struct sock *sk, struct sk_buff *skb,
}
#endif
__inet_hash(&tcp_hashinfo, newsk, 0);
__inet_hash_nolisten(&tcp_hashinfo, newsk);
__inet_inherit_port(&tcp_hashinfo, sk, newsk);
return newsk;