t/zbd: add run-tests-against-scsi_debug

The newly added test cases in t/zbd/test-zbd-support 72 and 73 require
error injection feature. They can be run with either null_blk or
scsi_debug, which provides the error injection feature. To run the test
cases easily with scsi_debug, add another script run-tests-against-
scsi_debug. It simply prepares a zoned scsi_debug device and run the two
test cases.

Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Link: https://lore.kernel.org/r/20250425052148.126788-9-shinichiro.kawasaki@wdc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/t/zbd/run-tests-against-scsi_debug b/t/zbd/run-tests-against-scsi_debug
new file mode 100755 (executable)
index 0000000..b50d7a2
--- /dev/null
+++ b/t/zbd/run-tests-against-scsi_debug
@@ -0,0 +1,33 @@
+#!/bin/bash
+#
+# Copyright (C) 2020 Western Digital Corporation or its affiliates.
+#
+# SPDX-License-Identifier: GPL-2.0
+#
+# A couple of test cases in t/zbd/test-zbd-support script depend on the error
+# injection feature of scsi_debug. Prepare a zoned scsi_debug device and run
+# only for the test cases.
+
+declare dev sg scriptdir
+
+scriptdir="$(cd "$(dirname "$0")" && pwd)"
+
+modprobe -qr scsi_debug
+modprobe scsi_debug add_host=1 zbc=host-managed zone_nr_conv=0
+
+dev=$(dmesg | tail -5 | grep "Attached SCSI disk" | grep -Po ".* \[\Ksd[a-z]*")
+
+if ! grep -qe scsi_debug /sys/block/"${dev}"/device/vpd_pg83; then
+       echo "Failed to create scsi_debug device"
+       exit 1
+fi
+
+sg=$(echo /sys/block/"${dev}"/device/scsi_generic/*)
+sg=${sg##*/}
+
+echo standard engine:
+"${scriptdir}"/test-zbd-support -t 72 -t 73 /dev/"${dev}"
+echo libzbc engine with block device:
+"${scriptdir}"/test-zbd-support -t 72 -t 73 -l /dev/"${dev}"
+echo libzbc engine with sg node:
+"${scriptdir}"/test-zbd-support -t 72 -t 73 -l /dev/"${sg}"