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tipc: add support for link state subscriptions

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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@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Erik Hugne 2014-04-24 16:26:46 +02:00 • committed by David S. Miller
parent d42f157b34
commit a89778d8ba
2 changed files with 6 additions and 1 deletions
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1
include/uapi/linux/tipc.h
View file

@ -87,6 +87,7 @@ static inline unsigned int tipc_node(__u32 addr)
#define TIPC_CFG_SRV 0 /* configuration service name type */ #define TIPC_CFG_SRV 0 /* configuration service name type */
#define TIPC_TOP_SRV 1 /* topology 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 */ #define TIPC_RESERVED_TYPES 64 /* lowest user-publishable name type */
/* /*

6
net/tipc/node.c
View file

@ -144,9 +144,11 @@ void tipc_node_stop(void)
void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr) void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
{ {
struct tipc_link **active = &n_ptr->active_links[0]; struct tipc_link **active = &n_ptr->active_links[0];
u32 addr = n_ptr->addr;
n_ptr->working_links++; 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", pr_info("Established link <%s> on network plane %c\n",
l_ptr->name, l_ptr->net_plane); 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) void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr)
{ {
struct tipc_link **active; struct tipc_link **active;
u32 addr = n_ptr->addr;
n_ptr->working_links--; n_ptr->working_links--;
tipc_nametbl_withdraw(TIPC_LINK_STATE, addr, l_ptr->bearer_id, addr);
if (!tipc_link_is_active(l_ptr)) { if (!tipc_link_is_active(l_ptr)) {
pr_info("Lost standby link <%s> on network plane %c\n", pr_info("Lost standby link <%s> on network plane %c\n",