[INET]: Generalise tcp_bind_hash & tcp_inherit_port
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>
diff --git a/include/net/inet_hashtables.h b/include/net/inet_hashtables.h
index 3a6c11c..da97055 100644
--- a/include/net/inet_hashtables.h
+++ b/include/net/inet_hashtables.h
@@ -14,12 +14,15 @@
#ifndef _INET_HASHTABLES_H
#define _INET_HASHTABLES_H
+#include <linux/interrupt.h>
#include <linux/ip.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>
+#include <net/sock.h>
+
/* This is for all connections with a full identity, no wildcards.
* New scheme, half the table is for TIME_WAIT, the other half is
* for the rest. I'll experiment with dynamic table growth later.
@@ -113,6 +116,7 @@
atomic_t lhash_users;
wait_queue_head_t lhash_wait;
spinlock_t portalloc_lock;
+ kmem_cache_t *bind_bucket_cachep;
};
static inline int inet_ehashfn(const __u32 laddr, const __u16 lport,
@@ -148,6 +152,9 @@
return lport & (bhash_size - 1);
}
+extern void inet_bind_hash(struct sock *sk, struct inet_bind_bucket *tb,
+ const unsigned short snum);
+
/* These can have wildcards, don't try too hard. */
static inline int inet_lhashfn(const unsigned short num)
{
@@ -159,4 +166,29 @@
return inet_lhashfn(inet_sk(sk)->num);
}
+/* Caller must disable local BH processing. */
+static inline void __inet_inherit_port(struct inet_hashinfo *table,
+ struct sock *sk, struct sock *child)
+{
+ const int bhash = inet_bhashfn(inet_sk(child)->num, table->bhash_size);
+ struct inet_bind_hashbucket *head = &table->bhash[bhash];
+ struct inet_bind_bucket *tb;
+
+ spin_lock(&head->lock);
+ tb = inet_sk(sk)->bind_hash;
+ sk_add_bind_node(child, &tb->owners);
+ inet_sk(child)->bind_hash = tb;
+ spin_unlock(&head->lock);
+}
+
+static inline void inet_inherit_port(struct inet_hashinfo *table,
+ struct sock *sk, struct sock *child)
+{
+ local_bh_disable();
+ __inet_inherit_port(table, sk, child);
+ local_bh_enable();
+}
+
+extern void inet_put_port(struct inet_hashinfo *table, struct sock *sk);
+
#endif /* _INET_HASHTABLES_H */
