2d8c4ce519
This required moving tcp_bucket_cachep to inet_hashinfo. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
|
|
* INET An implementation of the TCP/IP protocol suite for the LINUX
|
|
* operating system. INET is implemented using the BSD Socket
|
|
* interface as the means of communication with the user level.
|
|
*
|
|
* Generic INET transport hashtables
|
|
*
|
|
* Authors: Lotsa people, from code originally in tcp
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <net/inet_hashtables.h>
|
|
|
|
/*
|
|
* Allocate and initialize a new local port bind bucket.
|
|
* The bindhash mutex for snum's hash chain must be held here.
|
|
*/
|
|
struct inet_bind_bucket *inet_bind_bucket_create(kmem_cache_t *cachep,
|
|
struct inet_bind_hashbucket *head,
|
|
const unsigned short snum)
|
|
{
|
|
struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, SLAB_ATOMIC);
|
|
|
|
if (tb != NULL) {
|
|
tb->port = snum;
|
|
tb->fastreuse = 0;
|
|
INIT_HLIST_HEAD(&tb->owners);
|
|
hlist_add_head(&tb->node, &head->chain);
|
|
}
|
|
return tb;
|
|
}
|
|
|
|
EXPORT_SYMBOL(inet_bind_bucket_create);
|
|
|
|
/*
|
|
* Caller must hold hashbucket lock for this tb with local BH disabled
|
|
*/
|
|
void inet_bind_bucket_destroy(kmem_cache_t *cachep, struct inet_bind_bucket *tb)
|
|
{
|
|
if (hlist_empty(&tb->owners)) {
|
|
__hlist_del(&tb->node);
|
|
kmem_cache_free(cachep, tb);
|
|
}
|
|
}
|
|
|
|
void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
|
|
const unsigned short snum)
|
|
{
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
inet->num = snum;
|
|
sk_add_bind_node(sk, &tb->owners);
|
|
inet->bind_hash = tb;
|
|
}
|
|
|
|
EXPORT_SYMBOL(inet_bind_hash);
|
|
|
|
/*
|
|
* Get rid of any references to a local port held by the given sock.
|
|
*/
|
|
static void __inet_put_port(struct inet_hashinfo *hashinfo, struct sock *sk)
|
|
{
|
|
struct inet_sock *inet = inet_sk(sk);
|
|
const int bhash = inet_bhashfn(inet->num, hashinfo->bhash_size);
|
|
struct inet_bind_hashbucket *head = &hashinfo->bhash[bhash];
|
|
struct inet_bind_bucket *tb;
|
|
|
|
spin_lock(&head->lock);
|
|
tb = inet->bind_hash;
|
|
__sk_del_bind_node(sk);
|
|
inet->bind_hash = NULL;
|
|
inet->num = 0;
|
|
inet_bind_bucket_destroy(hashinfo->bind_bucket_cachep, tb);
|
|
spin_unlock(&head->lock);
|
|
}
|
|
|
|
void inet_put_port(struct inet_hashinfo *hashinfo, struct sock *sk)
|
|
{
|
|
local_bh_disable();
|
|
__inet_put_port(hashinfo, sk);
|
|
local_bh_enable();
|
|
}
|
|
|
|
EXPORT_SYMBOL(inet_put_port);
|