LU-16106 lnet: allow direct messages regardless of peer NI status

If check_routers_before_use is enabled, the router needs to
be pinged before it is used, which is not possible because
its NIs are assumed to be down at start-up. Don't prevent
discovery of the router in this case.

This change allows non-routed traffic to peer NIs with "down"
status.

Lustre-commit: 3345a8a54e89c342a4ce2d8d4bcb04ee919bcd52
Lustre-change: https://review.whamcloud.com/c/48355

Test-Parameters: trivial
Signed-off-by: Serguei Smirnov <ssmirnov@whamcloud.com>
Change-Id: I36fa60e37ef4f47c82c69855c9b0b80bad8a36f4
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/48669
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: Cyril Bordage <cbordage@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>

diff --git a/lnet/lnet/lib-move.c b/lnet/lnet/lib-move.c
index d8e17fc..9b12f86 100644 (file)
--- a/lnet/lnet/lib-move.c
+++ b/lnet/lnet/lib-move.c
@@ -812,8 +812,12 @@ lnet_peer_alive_locked(struct lnet_ni *ni, struct lnet_peer_ni *lpni,
        if (lnet_msg_is_response(msg))
                return 1;
 
+       /* always send non-routed messages */
+       if (!msg->msg_routing)
+               return 1;
+
        if (!lnet_is_peer_deadline_passed(lpni, now))
-               return true;
+               return 1;
 
        return lnet_is_peer_ni_alive(lpni);
 }