net: ib_net pointer should depends on CONFIG_NET_NS

We can shrink size of "struct inet_bind_bucket" by 50%, using
read_pnet() and write_pnet()

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index 44981906fb91..be41ebbec4eb 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -35,7 +35,7 @@ struct inet_bind_bucket *inet_bind_bucket_create(struct kmem_cache *cachep,
         struct inet_bind_bucket *tb = kmem_cache_alloc(cachep, GFP_ATOMIC);
 
         if (tb != NULL) {
-                tb->ib_net       = hold_net(net);
+                write_pnet(&tb->ib_net, hold_net(net));
                 tb->port      = snum;
                 tb->fastreuse = 0;
                 INIT_HLIST_HEAD(&tb->owners);
@@ -51,7 +51,7 @@ void inet_bind_bucket_destroy(struct kmem_cache *cachep, struct inet_bind_bucket
 {
         if (hlist_empty(&tb->owners)) {
                 __hlist_del(&tb->node);
-                release_net(tb->ib_net);
+                release_net(ib_net(tb));
                 kmem_cache_free(cachep, tb);
         }
 }
@@ -449,7 +449,7 @@ int __inet_hash_connect(struct inet_timewait_death_row *death_row,
                          * unique enough.
                          */
                         inet_bind_bucket_for_each(tb, node, &head->chain) {
-                                if (tb->ib_net == net && tb->port == port) {
+                                if (ib_net(tb) == net && tb->port == port) {
                                         WARN_ON(hlist_empty(&tb->owners));
                                         if (tb->fastreuse >= 0)
                                                 goto next_port;