[TIPC]: Fixed slow link reactivation when link tolerance is large

This patch corrects an issue wherein a previouly failed node could
not reestablish a links to a non-failing node in the TIPC network
until the latter node detected the link failure itself (which might
be configured to take up to 30 seconds).  The non-failing node now
responds to link setup requests from a previously failed node in at
most 1 second, allowing it to detect the link failure more quickly.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 3 deletions

diff --git a/net/tipc/discover.c b/net/tipc/discover.c
index cc748d4d4742..3b0cd12f37da 100644
--- a/net/tipc/discover.c
+++ b/net/tipc/discover.c
@@ -195,7 +195,8 @@ void tipc_disc_recv_msg(struct sk_buff *buf)
                 struct sk_buff *rbuf;
                 struct tipc_media_addr *addr;
                 struct node *n_ptr = tipc_node_find(orig);
-                int link_up;
+                int link_fully_up;
+
                 dbg(" in own cluster\n");
                 if (n_ptr == NULL) {
                         n_ptr = tipc_node_create(orig);
@@ -225,9 +226,9 @@ void tipc_disc_recv_msg(struct sk_buff *buf)
                         memcpy(addr, &media_addr, sizeof(*addr));
                         tipc_link_reset(link);     
                 }
-                link_up = tipc_link_is_up(link);
+                link_fully_up = (link->state == WORKING_WORKING);
                 spin_unlock_bh(&n_ptr->lock);                
-                if ((type == DSC_RESP_MSG) || link_up)
+                if ((type == DSC_RESP_MSG) || link_fully_up)
                         return;
                 rbuf = tipc_disc_init_msg(DSC_RESP_MSG, 1, orig, b_ptr);
                 if (rbuf != NULL) {