From 007087d0898a045901e4e120296e6d9b845b20a6 Mon Sep 17 00:00:00 2001
From: Mariusz Tkaczyk <mariusz.tkaczyk@intel.com>
Date: Wed, 9 Sep 2020 10:31:18 +0200
Subject: [PATCH 093/108] Monitor: stop notifing about containers.

Stop reporting any events from container but still track them,
it is important for spare migration.
Stop mdmonitor if no redundant array is presented in mdstat.
There is nothing to follow.

Signed-off-by: Mariusz Tkaczyk <mariusz.tkaczyk@intel.com>
Signed-off-by: Jes Sorensen <jsorensen@fb.com>
---
 Monitor.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/Monitor.c b/Monitor.c
index 80a3200..aed7a69 100644
--- a/Monitor.c
+++ b/Monitor.c
@@ -212,15 +212,24 @@ int Monitor(struct mddev_dev *devlist,
 		int new_found = 0;
 		struct state *st, **stp;
 		int anydegraded = 0;
+		int anyredundant = 0;
 
 		if (mdstat)
 			free_mdstat(mdstat);
 		mdstat = mdstat_read(oneshot ? 0 : 1, 0);
 
-		for (st = statelist; st; st = st->next)
+		for (st = statelist; st; st = st->next) {
 			if (check_array(st, mdstat, c->test, &info,
 					increments, c->prefer))
 				anydegraded = 1;
+			/* for external arrays, metadata is filled for
+			 * containers only
+			 */
+			if (st->metadata && st->metadata->ss->external)
+				continue;
+			if (st->err == 0 && !anyredundant)
+				anyredundant = 1;
+		}
 
 		/* now check if there are any new devices found in mdstat */
 		if (c->scan)
@@ -236,6 +245,9 @@ int Monitor(struct mddev_dev *devlist,
 		if (!new_found) {
 			if (oneshot)
 				break;
+			else if (!anyredundant) {
+				break;
+			}
 			else {
 				mdstat_wait(c->delay);
 				mdstat_close();
@@ -542,7 +554,8 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
 		st->err = 0;
 		st->percent = RESYNC_NONE;
 		new_array = 1;
-		alert("NewArray", st->devname, NULL, ainfo);
+		if (!is_container)
+			alert("NewArray", st->devname, NULL, ainfo);
 	}
 
 	if (st->utime == array.utime && st->failed == sra->array.failed_disks &&
@@ -676,7 +689,7 @@ static int check_array(struct state *st, struct mdstat_ent *mdstat,
 	return retval;
 
  disappeared:
-	if (!st->err)
+	if (!st->err && !is_container)
 		alert("DeviceDisappeared", dev, NULL, ainfo);
 	st->err++;
 	goto out;
-- 
2.7.5