[blktests,2/3] dm/003: add unmap write zeroes tests

Commit Message

Zhang Yi March 18, 2025, 7:28 a.m. UTC

From: Zhang Yi <[e-mail]>

Test block device unmap write zeroes sysfs interface with device-mapper
stacked devices. The /sys/block/<disk>/queue/write_zeroes_unmap
interface should return 1 if the underlying devices support the unmap
write zeroes command, and it should return 0 otherwise.

Signed-off-by: Zhang Yi <[e-mail]>
---
 common/rc        | 16 ++++++++++++++
 tests/dm/003     | 57 ++++++++++++++++++++++++++++++++++++++++++++++++
 tests/dm/003.out |  2 ++
 3 files changed, 75 insertions(+)
 create mode 100755 tests/dm/003
 create mode 100644 tests/dm/003.out

Patch

diff --git a/common/rc b/common/rc
index bc6c2e4..60c21f2 100644
--- a/common/rc
+++ b/common/rc
@@ -615,3 +615,19 @@  _io_uring_restore()
 		echo "$IO_URING_DISABLED" > /proc/sys/kernel/io_uring_disabled
 	fi
 }
+
+# get real device path name by following link
+_real_dev()
+{
+	local dev=$1
+	if [ -b "$dev" ] && [ -L "$dev" ]; then
+		dev=`readlink -f "$dev"`
+	fi
+	echo $dev
+}
+
+# basename of a device
+_short_dev()
+{
+	echo `basename $(_real_dev $1)`
+}
diff --git a/tests/dm/003 b/tests/dm/003
new file mode 100755
index 0000000..1013eb5
--- /dev/null
+++ b/tests/dm/003
@@ -0,0 +1,57 @@ 
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2025 Huawei.
+#
+# Test block device unmap write zeroes sysfs interface with device-mapper
+# stacked devices.
+
+. tests/dm/rc
+. common/scsi_debug
+
+DESCRIPTION="test unmap write zeroes sysfs interface with dm devices"
+QUICK=1
+
+requires() {
+	_have_scsi_debug
+}
+
+device_requries() {
+	_require_test_dev_sysfs queue/write_zeroes_unmap
+}
+
+setup_test_device() {
+	if ! _configure_scsi_debug "$@"; then
+		return 1
+	fi
+
+	local dev="/dev/${SCSI_DEBUG_DEVICES[0]}"
+	local blk_sz="$(blockdev --getsz "$dev")"
+	dmsetup create test --table "0 $blk_sz linear $dev 0"
+}
+
+cleanup_test_device() {
+	dmsetup remove test
+	_exit_scsi_debug
+}
+
+test() {
+	echo "Running ${TEST_NAME}"
+
+	# disable WRITE SAME with unmap
+	setup_test_device lbprz=0
+	umap="$(cat "/sys/block/$(_short_dev /dev/mapper/test)/queue/write_zeroes_unmap")"
+	if [[ $umap -ne 0 ]]; then
+		echo "Test disable WRITE SAME with unmap failed."
+	fi
+	cleanup_test_device
+
+	# enable WRITE SAME with unmap
+	setup_test_device lbprz=1 lbpws=1
+	umap="$(cat "/sys/block/$(_short_dev /dev/mapper/test)/queue/write_zeroes_unmap")"
+	if [[ $umap -ne 1 ]]; then
+		echo "Test enable WRITE SAME with unmap failed."
+	fi
+	cleanup_test_device
+
+	echo "Test complete"
+}
diff --git a/tests/dm/003.out b/tests/dm/003.out
new file mode 100644
index 0000000..51a5405
--- /dev/null
+++ b/tests/dm/003.out
@@ -0,0 +1,2 @@ 
+Running dm/003
+Test complete