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inet: add struct net argument to inet_bhashfn 

Binding to some port in many namespaces may create too long
chains in bhash-es, so prepare the hashfn to take struct net
into account.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2008-06-16 17:12:49 -07:00 committed by David S. Miller
parent 19c7578fb2
commit 7f635ab71e
4 changed files with 17 additions and 9 deletions
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3
include/net/inet_hashtables.h
View File

@ -201,7 +201,8 @@ extern struct inet_bind_bucket *
extern void inet_bind_bucket_destroy(struct kmem_cache *cachep,
struct inet_bind_bucket *tb);
static inline int inet_bhashfn(const __u16 lport, const int bhash_size)
static inline int inet_bhashfn(struct net *net,
const __u16 lport, const int bhash_size)
{
return lport & (bhash_size - 1);
}

6
net/ipv4/inet_connection_sock.c
View File

@ -103,7 +103,8 @@ int inet_csk_get_port(struct sock *sk, unsigned short snum)
rover = net_random() % remaining + low;
do {
head = &hashinfo->bhash[inet_bhashfn(rover, hashinfo->bhash_size)];
head = &hashinfo->bhash[inet_bhashfn(net, rover,
hashinfo->bhash_size)];
spin_lock(&head->lock);
inet_bind_bucket_for_each(tb, node, &head->chain)
if (tb->ib_net == net && tb->port == rover)
@ -130,7 +131,8 @@ int inet_csk_get_port(struct sock *sk, unsigned short snum)
*/
snum = rover;
} else {
head = &hashinfo->bhash[inet_bhashfn(snum, hashinfo->bhash_size)];
head = &hashinfo->bhash[inet_bhashfn(net, snum,
hashinfo->bhash_size)];
spin_lock(&head->lock);
inet_bind_bucket_for_each(tb, node, &head->chain)
if (tb->ib_net == net && tb->port == snum)

11
net/ipv4/inet_hashtables.c
View File

@ -70,7 +70,8 @@ void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
static void __inet_put_port(struct sock *sk)
{
struct inet_hashinfo *hashinfo = sk->sk_prot->h.hashinfo;
const int bhash = inet_bhashfn(inet_sk(sk)->num, hashinfo->bhash_size);
const int bhash = inet_bhashfn(sock_net(sk), inet_sk(sk)->num,
hashinfo->bhash_size);
struct inet_bind_hashbucket *head = &hashinfo->bhash[bhash];
struct inet_bind_bucket *tb;
@ -95,7 +96,8 @@ EXPORT_SYMBOL(inet_put_port);
void __inet_inherit_port(struct sock *sk, struct sock *child)
{
struct inet_hashinfo *table = sk->sk_prot->h.hashinfo;
const int bhash = inet_bhashfn(inet_sk(child)->num, table->bhash_size);
const int bhash = inet_bhashfn(sock_net(sk), inet_sk(child)->num,
table->bhash_size);
struct inet_bind_hashbucket *head = &table->bhash[bhash];
struct inet_bind_bucket *tb;
@ -438,7 +440,8 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
local_bh_disable();
for (i = 1; i <= remaining; i++) {
port = low + (i + offset) % remaining;
head = &hinfo->bhash[inet_bhashfn(port, hinfo->bhash_size)];
head = &hinfo->bhash[inet_bhashfn(net, port,
hinfo->bhash_size)];
spin_lock(&head->lock);
/* Does not bother with rcv_saddr checks,
@ -493,7 +496,7 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
goto out;
}
head = &hinfo->bhash[inet_bhashfn(snum, hinfo->bhash_size)];
head = &hinfo->bhash[inet_bhashfn(net, snum, hinfo->bhash_size)];
tb = inet_csk(sk)->icsk_bind_hash;
spin_lock_bh(&head->lock);
if (sk_head(&tb->owners) == sk && !sk->sk_bind_node.next) {

6
net/ipv4/inet_timewait_sock.c
View File

@ -32,7 +32,8 @@ static void __inet_twsk_kill(struct inet_timewait_sock *tw,
write_unlock(lock);
/* Disassociate with bind bucket. */
bhead = &hashinfo->bhash[inet_bhashfn(tw->tw_num, hashinfo->bhash_size)];
bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), tw->tw_num,
hashinfo->bhash_size)];
spin_lock(&bhead->lock);
tb = tw->tw_tb;
__hlist_del(&tw->tw_bind_node);
@ -81,7 +82,8 @@ void __inet_twsk_hashdance(struct inet_timewait_sock *tw, struct sock *sk,
Note, that any socket with inet->num != 0 MUST be bound in
binding cache, even if it is closed.
*/
bhead = &hashinfo->bhash[inet_bhashfn(inet->num, hashinfo->bhash_size)];
bhead = &hashinfo->bhash[inet_bhashfn(twsk_net(tw), inet->num,
hashinfo->bhash_size)];
spin_lock(&bhead->lock);
tw->tw_tb = icsk->icsk_bind_hash;
BUG_TRAP(icsk->icsk_bind_hash);