Add failure diagnostic output in fault/auto_spare_001_pos

Signed-off-by: Don Brady <dev.fs.zfs@gmail.com>

tests/zfs-tests/tests/functional/fault/auto_spare_001_pos.ksh

@@ -39,8 +39,17 @@
 
 verify_runnable "both"
 
+PASSED="/$TESTPOOL/$TESTFS/passed"
+
 function cleanup
 {
+	# if something failed log additional info
+	if [[ -e "/$TESTPOOL" && ! -e "$PASSED" ]]; then
+		log_note "$(zpool status $TESTPOOL)"
+		echo "==================== zed log search ===================="
+		grep "Diagnosis Engine" $ZEDLET_DIR/zed.log
+	fi
+
 	log_must zinject -c all
 	destroy_pool $TESTPOOL
 	rm -f $VDEV_FILES $SPARE_FILE
@@ -56,6 +65,8 @@ zed_events_drain
 TESTFILE="/$TESTPOOL/$TESTFS/testfile"
 
 for type in "mirror" "raidz" "raidz2" "draid:1s"; do
+	log_must rm -f $PASSED
+
 	if [ "$type" = "draid:1s" ]; then
 		# 1. Create a dRAID pool with a distributed hot spare
 		#
@@ -111,6 +122,8 @@ for type in "mirror" "raidz" "raidz2" "draid:1s"; do
 	log_must is_pool_resilvered $TESTPOOL
 	log_must check_state $TESTPOOL "" "ONLINE"
 
+	log_must touch $PASSED
+
 	cleanup
 done