[PATCH blktests 3/5] tests/nvmeof-mp/012: fix the schedulers list

[Yi Zhang]

There is no cfg scheduler and new added kyber scheduler in lastest kernel,
so get the scheduler from sysfs

To reproduce it:
$ ./check nvmeof-mp/012
nvmeof-mp/012 (dm-mpath on top of multiple I/O schedulers)   [passed]
    runtime  5.922s  ...  8.804s

$ cat results/nodev/nvmeof-mp/012.full  | grep -n "Changing scheduler"
31:Changing scheduler of dm-3 from mq-deadline kyber [bfq] none into cfq failed
47:Changing scheduler of dm-3 from mq-deadline kyber [bfq] none into cfq failed

Signed-off-by: Yi Zhang <yi.zhang at redhat.com>
---
 tests/nvmeof-mp/012 | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/tests/nvmeof-mp/012 b/tests/nvmeof-mp/012
index ae6a92c..96adc70 100755
--- a/tests/nvmeof-mp/012
+++ b/tests/nvmeof-mp/012
@@ -8,7 +8,7 @@ DESCRIPTION="dm-mpath on top of multiple I/O schedulers"
 QUICK=1
 
 test_io_schedulers() {
-	local dev m
+	local dev m dm scheds
 
 	# Load all I/O scheduler kernel modules
 	for m in "/lib/modules/$(uname -r)/kernel/block/"*.ko; do
@@ -17,15 +17,17 @@ test_io_schedulers() {
 	for mq in y n; do
 		use_blk_mq ${mq} || return $?
 		dev=$(get_bdev 0) || return $?
-		for sched in noop deadline bfq cfq; do
-			set_scheduler "$(basename "$(readlink -f "${dev}")")" $sched \
+		dm=$(basename "$(readlink -f "${dev}")") || return $?
+		scheds=$(sed 's/[][]//g' /sys/block/"$dm"/queue/scheduler) || return $?
+		for sched in $scheds; do
+			set_scheduler "$dm" "$sched" \
 				      >>"$FULL" 2>&1 || continue
 			echo "I/O scheduler: $sched; use_blk_mq: $mq" >>"$FULL"
 			run_fio --verify=md5 --rw=randwrite --bs=4K --size=64K \
 				--ioengine=libaio --iodepth=64 \
 				--iodepth_batch=32 --group_reporting --sync=1 \
 				--direct=1 --filename="$dev" \
-				--name=${sched} --thread --numjobs=1 \
+				--name="${sched}" --thread --numjobs=1 \
 				--output="${RESULTS_DIR}/nvmeof-mp/012-${sched}-${mq}.txt" \
 				>>"$FULL" ||
 				return $?
-- 
2.21.0