From: Erik Hugne Date: Thu, 24 Apr 2014 14:26:46 +0000 (+0200) Subject: tipc: add support for link state subscriptions X-Git-Tag: v3.16-rc1~27^2~322^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a89778d8baf19cd7e728d81121a294a06cedaad1;p=platform%2Fkernel%2Flinux-exynos.git 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: Erik Hugne Reviewed-by: Ying Xue Reviewed-by: Jon Maloy Signed-off-by: David S. Miller --- 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",