From 0a2cbbd1874d6c20e809ae9aa66930c732a23f22 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Tue, 30 Oct 2018 13:04:52 -0700
Subject: [PATCH] srp and nvmeof-mp: Check whether legacy dm is supported

Kernel commit 6a23e05c2fe3 ("dm: remove legacy request-based IO path")
retained dm-mq but removed the legacy dm code. Skip those tests that
require the legacy dm code.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
 common/multipath-over-rdma | 9 +++++++++
 tests/nvmeof-mp/004        | 4 ++++
 tests/srp/003              | 4 ++++
 tests/srp/004              | 4 ++++
 tests/srp/012              | 1 +
 5 files changed, 22 insertions(+)

diff --git a/common/multipath-over-rdma b/common/multipath-over-rdma
index b9cd06b..2bb53ab 100644
--- a/common/multipath-over-rdma
+++ b/common/multipath-over-rdma
@@ -4,6 +4,8 @@
 #
 # Functions and global variables used by both the srp and nvmeof-mp tests.
 
+. common/shellcheck
+
 debug=
 filesystem_type=ext4
 fio_aux_path=/tmp/fio-state-files
@@ -14,6 +16,13 @@ if [ $ramdisk_size -gt $max_ramdisk_size ]; then
 	ramdisk_size=$max_ramdisk_size
 fi
 
+_have_legacy_dm() {
+	if ! _have_kernel_option DM_MQ_DEFAULT; then
+		SKIP_REASON="legacy device mapper support is missing"
+		return 1
+	fi
+}
+
 get_ipv4_addr() {
 	ip -4 -o addr show dev "$1" |
 		sed -n 's/.*[[:blank:]]inet[[:blank:]]*\([^[:blank:]/]*\).*/\1/p'
diff --git a/tests/nvmeof-mp/004 b/tests/nvmeof-mp/004
index 9088cc7..990fcfc 100755
--- a/tests/nvmeof-mp/004
+++ b/tests/nvmeof-mp/004
@@ -7,6 +7,10 @@
 DESCRIPTION="File I/O on top of multipath concurrently with logout and login (sq-on-mq)"
 TIMED=1
 
+requires() {
+	_have_legacy_dm
+}
+
 test_disconnect_repeatedly() {
 	local dev fio_status m
 
diff --git a/tests/srp/003 b/tests/srp/003
index 6149b2e..51e9ee0 100755
--- a/tests/srp/003
+++ b/tests/srp/003
@@ -7,6 +7,10 @@
 DESCRIPTION="File I/O on top of multipath concurrently with logout and login (sq)"
 TIMED=1
 
+requires() {
+	_have_legacy_dm
+}
+
 test_disconnect_repeatedly() {
 	local dev fio_status m
 
diff --git a/tests/srp/004 b/tests/srp/004
index 49d7b1f..b500d64 100755
--- a/tests/srp/004
+++ b/tests/srp/004
@@ -7,6 +7,10 @@
 DESCRIPTION="File I/O on top of multipath concurrently with logout and login (sq-on-mq)"
 TIMED=1
 
+requires() {
+	_have_legacy_dm
+}
+
 test_disconnect_repeatedly() {
 	local dev fio_status m
 
diff --git a/tests/srp/012 b/tests/srp/012
index f50026f..20c6daf 100755
--- a/tests/srp/012
+++ b/tests/srp/012
@@ -15,6 +15,7 @@ test_io_schedulers() {
 		modprobe "$(basename "$m")" >&/dev/null
 	done
 	for mq in y n; do
+		[ $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
-- 
2.51.0