tipc: make tipc socket support net namespace

Now tipc socket table is statically allocated as a global variable.
Through it, we can look up one socket instance with port ID, insert
a new socket instance to the table, and delete a socket from the
table. But when tipc supports net namespace, each namespace must own
its specific socket table. So the global variable of socket table
must be redefined in tipc_net structure. As a concequence, a new
socket table will be allocated when a new namespace is created, and
a socket table will be deallocated when namespace is destroyed.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Tested-by: Tero Aho <Tero.Aho@coriant.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/net/tipc/core.h b/net/tipc/core.h
index 3f6f9e07da99..1a7f81643668 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -58,6 +58,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/etherdevice.h>
 #include <net/netns/generic.h>
+#include <linux/rhashtable.h>
 
 #include "node.h"
 #include "bearer.h"
@@ -101,6 +102,9 @@ struct tipc_net {
 	struct tipc_bcbearer *bcbearer;
 	struct tipc_bclink *bclink;
 	struct tipc_link *bcl;
+
+	/* Socket hash table */
+	struct rhashtable sk_rht;
 };
 
 #ifdef CONFIG_SYSCTL