[PATCH blktests 2/2] block/011: Perform PCI reset while doing IO

Johannes Thumshirn
2017-06-23T14:30:12Z

From: Omar Sandoval <osandov@fb.com>

This test-case performs I/O with fio while doing PCI disable/enable
cycles.

In the results we don't care for I/O errors but for hiccups in dmesg only.

Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
---
tests/block/011 | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/block/011.out | 2 ++
2 files changed, 56 insertions(+)
create mode 100755 tests/block/011
create mode 100644 tests/block/011.out

diff --git a/tests/block/011 b/tests/block/011
new file mode 100755
index 000000000000..b0de35816d48
--- /dev/null
+++ b/tests/block/011
@@ -0,0 +1,54 @@
+#!/bin/bash
+#
+# Do disable PCI device while doing I/O to it
+#
+# Copyright (C) 2017 Johannes Thumshirn <jthumshirn@suse.de>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+DESCRIPTION="disable PCI device while doing I/O"
+TIMED=1
+
+requires() {
+ _have_fio
+}
+
+device_requires() {
+ _test_dev_is_pci
+}
+
+test_device() {
+ echo "Running ${TEST_NAME}"
+
+ pdev=$(_get_pci_dev_from_blkdev)
+
+ if _test_dev_is_rotational; then
+ size="32m"
+ else
+ size="1g"
+ fi
+
+ # start fio job
+ _run_fio --bs=4k --rw=randread --norandommap \
+ --name=reads --filename="$TEST_DEV" --size="$size" \
+ --numjobs=8 --direct=1 2>/dev/null &
+
+ while kill -0 $! 2>/dev/null; do
+ echo 0 > "/sys/bus/pci/devices/${pdev}/enable"
+ sleep .2
+ echo 1 > "/sys/bus/pci/devices/${pdev}/enable"
+ done
+
+ echo "Test complete"
+}
diff --git a/tests/block/011.out b/tests/block/011.out
new file mode 100644
index 000000000000..8e067df63097
--- /dev/null
+++ b/tests/block/011.out
@@ -0,0 +1,2 @@
+Running block/011
+Test complete
--
2.12.3