LU-11300 lnet: peer aliveness

[fs/lustre-release.git] / lnet / include / lnet / lib-lnet.h

diff --git a/lnet/include/lnet/lib-lnet.h b/lnet/include/lnet/lib-lnet.h
index dd4b34e..72f5c64 100644 (file)
--- a/lnet/include/lnet/lib-lnet.h
+++ b/lnet/include/lnet/lib-lnet.h
@@ -955,15 +955,6 @@ lnet_find_peer_net_locked(struct lnet_peer *peer, __u32 net_id)
        return NULL;
 }
 
-static inline void
-lnet_peer_set_alive(struct lnet_peer_ni *lp)
-{
-       lp->lpni_last_alive = ktime_get_seconds();
-       lp->lpni_last_query = lp->lpni_last_alive;
-       if (!lp->lpni_alive)
-               lnet_notify_locked(lp, 0, 1, lp->lpni_last_alive);
-}
-
 static inline bool
 lnet_peer_is_multi_rail(struct lnet_peer *lp)
 {
@@ -1002,6 +993,22 @@ lnet_peer_needs_push(struct lnet_peer *lp)
        return false;
 }
 
+/*
+ * A peer is alive if it satisfies the following two conditions:
+ *  1. peer health >= LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage
+ *  2. the cached NI status received when we discover the peer is UP
+ */
+static inline bool
+lnet_is_peer_ni_alive(struct lnet_peer_ni *lpni)
+{
+       bool halive = false;
+
+       halive = (atomic_read(&lpni->lpni_healthv) >=
+                (LNET_MAX_HEALTH_VALUE * router_sensitivity_percentage / 100));
+
+       return halive && lpni->lpni_ns_status == LNET_NI_STATUS_UP;
+}
+
 static inline void
 lnet_inc_healthv(atomic_t *healthv)
 {