[PATCH V3 blktests 3/5] nvmeof-mp/012, srp/012: fix the scheduler list

[Yi Zhang]

There is no cfq scheduler and new added kyber scheduler in lastest kernel,
introduce get_scheduler_list and fix nvmeof-mp/012 srp/012

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>
---
 common/multipath-over-rdma | 11 +++++++++++
 tests/nvmeof-mp/012        | 10 ++++++----
 tests/srp/012              | 10 ++++++----
 3 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/common/multipath-over-rdma b/common/multipath-over-rdma
index ebc5939..ba6fa0d 100644
--- a/common/multipath-over-rdma
+++ b/common/multipath-over-rdma
@@ -326,6 +326,17 @@ set_scheduler() {
 	fi
 }
 
+# Get block dev scheduler list
+get_scheduler_list() {
+	local b=$1 p
+	p=/sys/block/"$b"/queue/scheduler
+	if [ -e "$p" ]; then
+		sed 's/[][]//g' /sys/block/"$b"/queue/scheduler
+	else
+		return 1
+	fi
+}
+
 # Get a /dev/... path that points at dm device number $1. Set its I/O scheduler
 # to $2 and its timeout to $3. The shell script that includes this file must
 # define a function get_bdev_path() that translates device number $1 into a
diff --git a/tests/nvmeof-mp/012 b/tests/nvmeof-mp/012
index ae6a92c..8b2e918 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 $?
+		scheds="$(get_scheduler_list "$dm")" || 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 $?
diff --git a/tests/srp/012 b/tests/srp/012
index 20c6daf..ffd56ef 100755
--- a/tests/srp/012
+++ b/tests/srp/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
@@ -18,15 +18,17 @@ test_io_schedulers() {
 		[ $mq = n ] && ! _have_legacy_dm && continue
 		use_blk_mq ${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 $?
+		scheds="$(get_scheduler_list "$dm")" || 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}/srp/012-${sched}-${mq}.txt" \
 				>>"$FULL" ||
 				return $?
-- 
2.21.0