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Message-ID: <1398349607-16012-2-git-send-email-erik.hugne@ericsson.com>
Date: Thu, 24 Apr 2014 16:26:46 +0200
From: <erik.hugne@...csson.com>
To: <netdev@...r.kernel.org>, <tipc-discussion@...ts.sourceforge.net>,
<jon.maloy@...csson.com>, <maloy@...jonn.com>
CC: <ying.xue@...driver.com>, <paul.gortmaker@...driver.com>,
<richard.alpe@...csson.com>, Erik Hugne <erik.hugne@...csson.com>
Subject: [PATCH net-next v2 1/2] tipc: add support for link state subscriptions
From: Erik Hugne <erik.hugne@...csson.com>
When links are established over a bearer plane, we create a node
local publication containing information about the peer node and
bearer plane. This allows TIPC applications to use the standard
TIPC topology server subscription mechanism to get notifications
when a link goes up or down.
Signed-off-by: Erik Hugne <erik.hugne@...csson.com>
Reviewed-by: Ying Xue <ying.xue@...driver.com>
Reviewed-by: Jon Maloy <jon.maloy@...csson.com>
---
include/uapi/linux/tipc.h | 1 +
net/tipc/node.c | 6 +++++-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/tipc.h b/include/uapi/linux/tipc.h
index 852373d..53cd790 100644
--- a/include/uapi/linux/tipc.h
+++ b/include/uapi/linux/tipc.h
@@ -87,6 +87,7 @@ static inline unsigned int tipc_node(__u32 addr)
#define TIPC_CFG_SRV 0 /* configuration service name type */
#define TIPC_TOP_SRV 1 /* topology service name type */
+#define TIPC_LINK_STATE 2 /* link state name type */
#define TIPC_RESERVED_TYPES 64 /* lowest user-publishable name type */
/*
diff --git a/net/tipc/node.c b/net/tipc/node.c
index be90115..3b86a74 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -144,9 +144,11 @@ void tipc_node_stop(void)
void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
{
struct tipc_link **active = &n_ptr->active_links[0];
+ u32 addr = n_ptr->addr;
n_ptr->working_links++;
-
+ tipc_nametbl_publish(TIPC_LINK_STATE, addr, addr, TIPC_NODE_SCOPE,
+ l_ptr->bearer_id, addr);
pr_info("Established link <%s> on network plane %c\n",
l_ptr->name, l_ptr->net_plane);
@@ -203,8 +205,10 @@ static void node_select_active_links(struct tipc_node *n_ptr)
void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
{
struct tipc_link **active;
+ u32 addr = n_ptr->addr;
n_ptr->working_links--;
+ tipc_nametbl_withdraw(TIPC_LINK_STATE, addr, l_ptr->bearer_id, addr);
if (!tipc_link_is_active(l_ptr)) {
pr_info("Lost standby link <%s> on network plane %c\n",
--
1.8.3.2
--
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