Commit a89778d8 authored by Erik Hugne's avatar Erik Hugne Committed by David S. Miller
Browse files

tipc: add support for link state subscriptions

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: default avatarErik Hugne <>
Reviewed-by: Ying Xue's avatarYing Xue <>
Reviewed-by: default avatarJon Maloy <>
Signed-off-by: default avatarDavid S. Miller <>
parent d42f157b
......@@ -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 */
......@@ -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;
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;
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",
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