tests: add a regression test that reshape can corrupt data

This is a regression test for commit 1544e95c6dd8 ("md: fix data
corruption for raid456 when reshape restart while grow up").

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Jes Sorensen <jes@trained-monkey.org>

diff --git a/tests/25raid456-reshape-corrupt-data b/tests/25raid456-reshape-corrupt-data
new file mode 100644 (file)
index 0000000..fdb875f
--- /dev/null
+++ b/tests/25raid456-reshape-corrupt-data
@@ -0,0 +1,35 @@
+devs="$dev0 $dev1 $dev2"
+
+set_up_test()
+{
+       mdadm -Cv -R -n 3 -l5 $md0 $devs --size=50M || die "create array failed"
+       mdadm -a $md0 $dev3 || die "failed to bind new disk to array"
+       mkfs.xfs -f $md0 || die "mkfs failed"
+       xfs_ncheck $md0 || die "check fs failed"
+}
+
+clean_up_test()
+{
+       mdadm -S $md0
+}
+
+trap 'clean_up_test' EXIT
+
+set_up_test || die "set up test failed"
+
+# trigger reshape
+echo 1000 > /sys/block/md0/md/sync_speed_max
+mdadm --grow -l 6 $md0
+sleep 1
+
+# stop and start reshape
+echo frozen > /sys/block/md0/md/sync_action
+echo system > /sys/block/md0/md/sync_speed_max
+echo reshape > /sys/block/md0/md/sync_action
+
+mdadm -W $md0
+
+# check if data is corrupted
+xfs_ncheck $md0 || die "data is corrupted after reshape"
+
+exit 0