tipc: make bearer list support net namespace

Bearer list defined as a global variable is used to store bearer
instances. When tipc supports net namespace, bearers created in
one namespace must be isolated with others allocated in other
namespaces, which requires us that the bearer list(bearer_list)
must be moved to tipc_net structure. As a result, a net namespace
pointer has to be passed to functions which access the bearer list.

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, 8 insertions, 4 deletions

diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index f0fd8b4..f93dd3d 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -51,6 +51,7 @@
 /**
  * struct tipc_link_req - information about an ongoing link setup request
  * @bearer_id: identity of bearer issuing requests
+ * @net: network namespace instance
  * @dest: destination address for request messages
  * @domain: network domain to which links can be established
  * @num_nodes: number of nodes currently discovered (i.e. with an active link)
@@ -62,6 +63,7 @@
 struct tipc_link_req {
 	u32 bearer_id;
 	struct tipc_media_addr dest;
+	struct net *net;
 	u32 domain;
 	int num_nodes;
 	spinlock_t lock;
@@ -254,7 +256,7 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *buf,
 		rbuf = tipc_buf_acquire(INT_H_SIZE);
 		if (rbuf) {
 			tipc_disc_init_msg(net, rbuf, DSC_RESP_MSG, bearer);
-			tipc_bearer_send(bearer->identity, rbuf, &maddr);
+			tipc_bearer_send(net, bearer->identity, rbuf, &maddr);
 			kfree_skb(rbuf);
 		}
 	}
@@ -328,7 +330,7 @@ static void disc_timeout(unsigned long data)
 	 * hold at fast polling rate if don't have any associated nodes,
 	 * otherwise hold at slow polling rate
 	 */
-	tipc_bearer_send(req->bearer_id, req->buf, &req->dest);
+	tipc_bearer_send(req->net, req->bearer_id, req->buf, &req->dest);
 
 
 	req->timer_intv *= 2;
@@ -370,6 +372,7 @@ int tipc_disc_create(struct net *net, struct tipc_bearer *b_ptr,
 
 	tipc_disc_init_msg(net, req->buf, DSC_REQ_MSG, b_ptr);
 	memcpy(&req->dest, dest, sizeof(*dest));
+	req->net = net;
 	req->bearer_id = b_ptr->identity;
 	req->domain = b_ptr->domain;
 	req->num_nodes = 0;
@@ -378,7 +381,7 @@ int tipc_disc_create(struct net *net, struct tipc_bearer *b_ptr,
 	setup_timer(&req->timer, disc_timeout, (unsigned long)req);
 	mod_timer(&req->timer, jiffies + req->timer_intv);
 	b_ptr->link_req = req;
-	tipc_bearer_send(req->bearer_id, req->buf, &req->dest);
+	tipc_bearer_send(net, req->bearer_id, req->buf, &req->dest);
 	return 0;
 }
 
@@ -405,11 +408,12 @@ void tipc_disc_reset(struct net *net, struct tipc_bearer *b_ptr)
 
 	spin_lock_bh(&req->lock);
 	tipc_disc_init_msg(net, req->buf, DSC_REQ_MSG, b_ptr);
+	req->net = net;
 	req->bearer_id = b_ptr->identity;
 	req->domain = b_ptr->domain;
 	req->num_nodes = 0;
 	req->timer_intv = TIPC_LINK_REQ_INIT;
 	mod_timer(&req->timer, jiffies + req->timer_intv);
-	tipc_bearer_send(req->bearer_id, req->buf, &req->dest);
+	tipc_bearer_send(net, req->bearer_id, req->buf, &req->dest);
 	spin_unlock_bh(&req->lock);
 }