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-rw-r--r--include/net/inet_connection_sock.h6
-rw-r--r--net/dccp/ipv4.c3
-rw-r--r--net/ipv4/inet_connection_sock.c11
-rw-r--r--net/ipv4/tcp_ipv4.c3
-rw-r--r--net/ipv6/tcp_ipv6.c95
5 files changed, 21 insertions, 97 deletions
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index b0c99060b78..edc68e858d5 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -192,8 +192,12 @@ extern struct request_sock *inet_csk_search_req(const struct sock *sk,
const __u16 rport,
const __u32 raddr,
const __u32 laddr);
+extern int inet_csk_bind_conflict(const struct sock *sk,
+ const struct inet_bind_bucket *tb);
extern int inet_csk_get_port(struct inet_hashinfo *hashinfo,
- struct sock *sk, unsigned short snum);
+ struct sock *sk, unsigned short snum,
+ int (*bind_conflict)(const struct sock *sk,
+ const struct inet_bind_bucket *tb));
extern struct dst_entry* inet_csk_route_req(struct sock *sk,
const struct request_sock *req);
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 656e13e38cf..1ac3e30ae79 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -37,7 +37,8 @@ EXPORT_SYMBOL_GPL(dccp_hashinfo);
static int dccp_v4_get_port(struct sock *sk, const unsigned short snum)
{
- return inet_csk_get_port(&dccp_hashinfo, sk, snum);
+ return inet_csk_get_port(&dccp_hashinfo, sk, snum,
+ inet_csk_bind_conflict);
}
static void dccp_v4_hash(struct sock *sk)
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 3fe021f1a56..f05b6e76110 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -37,7 +37,8 @@ EXPORT_SYMBOL(inet_csk_timer_bug_msg);
*/
int sysctl_local_port_range[2] = { 1024, 4999 };
-static inline int inet_csk_bind_conflict(struct sock *sk, struct inet_bind_bucket *tb)
+int inet_csk_bind_conflict(const struct sock *sk,
+ const struct inet_bind_bucket *tb)
{
const u32 sk_rcv_saddr = inet_rcv_saddr(sk);
struct sock *sk2;
@@ -62,11 +63,15 @@ static inline int inet_csk_bind_conflict(struct sock *sk, struct inet_bind_bucke
return node != NULL;
}
+EXPORT_SYMBOL_GPL(inet_csk_bind_conflict);
+
/* Obtain a reference to a local port for the given sock,
* if snum is zero it means select any available local port.
*/
int inet_csk_get_port(struct inet_hashinfo *hashinfo,
- struct sock *sk, unsigned short snum)
+ struct sock *sk, unsigned short snum,
+ int (*bind_conflict)(const struct sock *sk,
+ const struct inet_bind_bucket *tb))
{
struct inet_bind_hashbucket *head;
struct hlist_node *node;
@@ -125,7 +130,7 @@ tb_found:
goto success;
} else {
ret = 1;
- if (inet_csk_bind_conflict(sk, tb))
+ if (bind_conflict(sk, tb))
goto fail_unlock;
}
}
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 4d5021e1929..2aa19c89a94 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -97,7 +97,8 @@ struct inet_hashinfo __cacheline_aligned tcp_hashinfo = {
static int tcp_v4_get_port(struct sock *sk, unsigned short snum)
{
- return inet_csk_get_port(&tcp_hashinfo, sk, snum);
+ return inet_csk_get_port(&tcp_hashinfo, sk, snum,
+ inet_csk_bind_conflict);
}
static void tcp_v4_hash(struct sock *sk)
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 8827389abaf..76c8f5a2f7f 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -76,8 +76,8 @@ static int tcp_v6_xmit(struct sk_buff *skb, int ipfragok);
static struct tcp_func ipv6_mapped;
static struct tcp_func ipv6_specific;
-static inline int tcp_v6_bind_conflict(const struct sock *sk,
- const struct inet_bind_bucket *tb)
+int inet6_csk_bind_conflict(const struct sock *sk,
+ const struct inet_bind_bucket *tb)
{
const struct sock *sk2;
const struct hlist_node *node;
@@ -97,97 +97,10 @@ static inline int tcp_v6_bind_conflict(const struct sock *sk,
return node != NULL;
}
-/* Grrr, addr_type already calculated by caller, but I don't want
- * to add some silly "cookie" argument to this method just for that.
- * But it doesn't matter, the recalculation is in the rarest path
- * this function ever takes.
- */
static int tcp_v6_get_port(struct sock *sk, unsigned short snum)
{
- struct inet_bind_hashbucket *head;
- struct inet_bind_bucket *tb;
- struct hlist_node *node;
- int ret;
-
- local_bh_disable();
- if (snum == 0) {
- int low = sysctl_local_port_range[0];
- int high = sysctl_local_port_range[1];
- int remaining = (high - low) + 1;
- int rover = net_random() % (high - low) + low;
-
- do {
- head = &tcp_hashinfo.bhash[inet_bhashfn(rover, tcp_hashinfo.bhash_size)];
- spin_lock(&head->lock);
- inet_bind_bucket_for_each(tb, node, &head->chain)
- if (tb->port == rover)
- goto next;
- break;
- next:
- spin_unlock(&head->lock);
- if (++rover > high)
- rover = low;
- } while (--remaining > 0);
-
- /* Exhausted local port range during search? It is not
- * possible for us to be holding one of the bind hash
- * locks if this test triggers, because if 'remaining'
- * drops to zero, we broke out of the do/while loop at
- * the top level, not from the 'break;' statement.
- */
- ret = 1;
- if (unlikely(remaining <= 0))
- goto fail;
-
- /* OK, here is the one we will use. */
- snum = rover;
- } else {
- head = &tcp_hashinfo.bhash[inet_bhashfn(snum, tcp_hashinfo.bhash_size)];
- spin_lock(&head->lock);
- inet_bind_bucket_for_each(tb, node, &head->chain)
- if (tb->port == snum)
- goto tb_found;
- }
- tb = NULL;
- goto tb_not_found;
-tb_found:
- if (tb && !hlist_empty(&tb->owners)) {
- if (tb->fastreuse > 0 && sk->sk_reuse &&
- sk->sk_state != TCP_LISTEN) {
- goto success;
- } else {
- ret = 1;
- if (tcp_v6_bind_conflict(sk, tb))
- goto fail_unlock;
- }
- }
-tb_not_found:
- ret = 1;
- if (tb == NULL) {
- tb = inet_bind_bucket_create(tcp_hashinfo.bind_bucket_cachep, head, snum);
- if (tb == NULL)
- goto fail_unlock;
- }
- if (hlist_empty(&tb->owners)) {
- if (sk->sk_reuse && sk->sk_state != TCP_LISTEN)
- tb->fastreuse = 1;
- else
- tb->fastreuse = 0;
- } else if (tb->fastreuse &&
- (!sk->sk_reuse || sk->sk_state == TCP_LISTEN))
- tb->fastreuse = 0;
-
-success:
- if (!inet_csk(sk)->icsk_bind_hash)
- inet_bind_hash(sk, tb, snum);
- BUG_TRAP(inet_csk(sk)->icsk_bind_hash == tb);
- ret = 0;
-
-fail_unlock:
- spin_unlock(&head->lock);
-fail:
- local_bh_enable();
- return ret;
+ return inet_csk_get_port(&tcp_hashinfo, sk, snum,
+ inet6_csk_bind_conflict);
}
static __inline__ void __tcp_v6_hash(struct sock *sk)