[NETNS]: Make bind buckets live in net namespaces.

This tags the inet_bind_bucket struct with net pointer,
initializes it during creation and makes a filtering
during lookup.

A better hashfn, that takes the net into account is to
be done in the future, but currently all bind buckets
with similar port will be in one hash chain.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 3 deletions

diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 7801cceb2d1b..de5a41de191a 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -87,6 +87,7 @@ int inet_csk_get_port(struct inet_hashinfo *hashinfo,
         struct hlist_node *node;
         struct inet_bind_bucket *tb;
         int ret;
+        struct net *net = sk->sk_net;
 
         local_bh_disable();
         if (!snum) {
@@ -100,7 +101,7 @@ int inet_csk_get_port(struct inet_hashinfo *hashinfo,
                         head = &hashinfo->bhash[inet_bhashfn(rover, hashinfo->bhash_size)];
                         spin_lock(&head->lock);
                         inet_bind_bucket_for_each(tb, node, &head->chain)
-                                if (tb->port == rover)
+                                if (tb->ib_net == net && tb->port == rover)
                                         goto next;
                         break;
                 next:
@@ -127,7 +128,7 @@ int inet_csk_get_port(struct inet_hashinfo *hashinfo,
                 head = &hashinfo->bhash[inet_bhashfn(snum, hashinfo->bhash_size)];
                 spin_lock(&head->lock);
                 inet_bind_bucket_for_each(tb, node, &head->chain)
-                        if (tb->port == snum)
+                        if (tb->ib_net == net && tb->port == snum)
                                 goto tb_found;
         }
         tb = NULL;
@@ -147,7 +148,8 @@ tb_found:
         }
 tb_not_found:
         ret = 1;
-        if (!tb && (tb = inet_bind_bucket_create(hashinfo->bind_bucket_cachep, head, snum)) == NULL)
+        if (!tb && (tb = inet_bind_bucket_create(hashinfo->bind_bucket_cachep,
+                                        net, head, snum)) == NULL)
                 goto fail_unlock;
         if (hlist_empty(&tb->owners)) {
                 if (sk->sk_reuse && sk->sk_state != TCP_LISTEN)