[PATCH blktests V2 1/1] nvme: add nvme pci timeout testcase

[Chaitanya Kulkarni]

Trigger and test nvme-pci timeout with concurrent fio jobs.

Signed-off-by: Chaitanya Kulkarni <kch at nvidia.com>
---
 tests/nvme/050     | 74 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/nvme/050.out |  2 ++
 2 files changed, 76 insertions(+)
 create mode 100755 tests/nvme/050
 create mode 100644 tests/nvme/050.out

diff --git a/tests/nvme/050 b/tests/nvme/050
new file mode 100755
index 0000000..6c44b43
--- /dev/null
+++ b/tests/nvme/050
@@ -0,0 +1,74 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-3.0+
+# Copyright (C) 2024 Chaitanya Kulkarni
+#
+# Test NVMe-PCI timeout with FIO jobs by triggering the nvme_timeout function.
+#
+
+. tests/nvme/rc
+
+DESCRIPTION="test nvme-pci timeout with fio jobs"
+
+sysfs_path="/sys/kernel/debug/fail_io_timeout/"
+#restrict test to nvme-pci only
+nvme_trtype=pci
+
+# fault injection config array
+declare -A fi_array
+
+requires() {
+        _require_nvme_trtype pci
+        _have_fio
+        _nvme_requires
+        _have_kernel_option FAIL_IO_TIMEOUT
+}
+
+device_requires() {
+	_require_test_dev_is_nvme
+}
+
+save_fi_settings() {
+	for fi_attr in probability interval times space verbose
+	do
+		fi_array["${fi_attr}"]=$(cat "${sysfs_path}/${fi_attr}")
+	done
+}
+
+restore_fi_settings() {
+	for fi_attr in probability interval times space verbose
+	do
+		echo "${fi_array["${fi_attr}"]}" > "${sysfs_path}/${fi_attr}"
+	done
+}
+
+test_device() {
+	local nvme_ns
+	local io_fimeout_fail
+
+	echo "Running ${TEST_NAME}"
+
+	nvme_ns="$(basename "${TEST_DEV}")"
+	io_fimeout_fail="$(cat /sys/block/"${nvme_ns}"/io-timeout-fail)"
+	save_fi_settings
+	echo 1 > /sys/block/"${nvme_ns}"/io-timeout-fail
+
+	echo 99 > /sys/kernel/debug/fail_io_timeout/probability
+	echo 10 > /sys/kernel/debug/fail_io_timeout/interval
+	echo -1 > /sys/kernel/debug/fail_io_timeout/times
+	echo  0 > /sys/kernel/debug/fail_io_timeout/space
+	echo  1 > /sys/kernel/debug/fail_io_timeout/verbose
+
+	fio --bs=4k --rw=randread --norandommap --numjobs="$(nproc)" \
+	    --name=reads --direct=1 --filename="${TEST_DEV}" --group_reporting \
+	    --time_based --runtime=1m 2>&1 | grep -q "Input/output error"
+
+	# shellcheck disable=SC2181
+	if [ $? -eq 0 ]; then
+		echo "Test complete"
+	else
+		echo "Test failed"
+	fi
+
+	restore_fi_settings
+	echo "${io_fimeout_fail}" > /sys/block/"${nvme_ns}"/io-timeout-fail
+}
diff --git a/tests/nvme/050.out b/tests/nvme/050.out
new file mode 100644
index 0000000..b78b05f
--- /dev/null
+++ b/tests/nvme/050.out
@@ -0,0 +1,2 @@
+Running nvme/050
+Test complete
-- 
2.40.0