mdadm/test: Add a mode to repeat specified tests

Many tests fail infrequently or rarely. To help find these, add
an option to run the tests multiple times by specifying --loop=N.

If --loop=0 is specified, the test will be looped forever.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>

1 files changed, 24 insertions, 12 deletions

diff --git a/test b/test
index 711a3c7a..da6db5e0 100755
--- a/test
+++ b/test
@@ -10,6 +10,7 @@ devlist=
 
 savelogs=0
 exitonerror=1
+loop=1
 prefix='[0-9][0-9]'
 
 # use loop devices by default if doesn't specify --dev
@@ -117,6 +118,7 @@ do_help() {
 		--logdir=directory          Directory to save all logfiles in
 		--save-logs                 Usually use with --logdir together
 		--keep-going | --no-error   Don't stop on error, ie. run all tests
+		--loop=N                    Run tests N times (0 to run forever)
 		--dev=loop|lvm|ram|disk     Use loop devices (default), LVM, RAM or disk
 		--disks=                    Provide a bunch of physical devices for test
 		--volgroup=name             LVM volume group for LVM test
@@ -211,6 +213,9 @@ parse_args() {
 		--keep-going | --no-error )
 			exitonerror=0
 			;;
+		--loop=* )
+			loop="${i##*=}"
+			;;
 		--disable-multipath )
 			unset MULTIPATH
 			;;
@@ -263,19 +268,26 @@ main() {
 	echo "Testing on linux-$(uname -r) kernel"
 	[ "$savelogs" == "1" ] &&
 		echo "Saving logs to $logdir"
-	if [ "x$TESTLIST" != "x" ]
-	then
-		for script in ${TESTLIST[@]}
-		do
-			do_test $testdir/$script
-		done
-	else
-		for script in $testdir/$prefix $testdir/$prefix*[^~]
-		do
-			do_test $script
-		done
-	fi
 
+	while true; do
+		if [ "x$TESTLIST" != "x" ]
+		then
+			for script in ${TESTLIST[@]}
+			do
+				do_test $testdir/$script
+			done
+		else
+			for script in $testdir/$prefix $testdir/$prefix*[^~]
+			do
+				do_test $script
+			done
+		fi
+
+		let loop=$loop-1
+		if [ "$loop" == "0" ]; then
+			break
+		fi
+	done
 	exit 0
 }