2 files changed, 83 insertions, 0 deletions
diff --git a/tests/07revert-grow b/tests/07revert-grow
new file mode 100644
index 0000000..c8c4e85
--- /dev/null
+++ b/tests/07revert-grow
@@ -0,0 +1,52 @@
+set -e -x
+
+# revert a reshape that is increasing the number of devices,
+# raid5, raid6, and raid10
+
+# metadate 0.90 cannot handle RAID10 growth
+# metadata 1.0 doesn't get a default headspace, is don't try it either.
+
+for metadata in 0.90 1.1 1.2
+do
+# RAID5
+mdadm -CR --assume-clean $md0 -l5 -n4 -x1 $devlist4 --metadata=$metadata
+check raid5
+testdev $md0 3 $mdsize1 512
+mdadm -G $md0 -n 5
+sleep 3
+mdadm -S $md0
+mdadm -A $md0 --update=revert-reshape $devlist4 --backup-file=/tmp/md-backup
+check wait
+check raid5
+testdev $md0 3 $mdsize1 512
+mdadm -S $md0
+
+# RAID6
+mdadm -CR --assume-clean $md0 -l6 -n4 -x1 $devlist4 --metadata=$metadata
+check raid6
+testdev $md0 2 $mdsize1 512
+mdadm -G $md0 -n 5
+sleep 3
+mdadm -S $md0
+mdadm -A $md0 --update=revert-reshape $devlist4 --backup-file=/tmp/md-backup
+check wait
+check raid6
+testdev $md0 2 $mdsize1 512
+mdadm -S $md0
+
+if [ $metadata = 0.90 ]; then continue; fi
+
+# RAID10
+mdadm -CR --assume-clean $md0 -l10 -n4 -x1 $devlist4 --metadata=$metadata
+check raid10
+testdev $md0 2 $mdsize1 512
+mdadm -G $md0 -n 5
+sleep 3
+mdadm -S $md0
+strace -o /tmp/str ./mdadm -A $md0 --update=revert-reshape $devlist4
+check wait
+check raid10
+testdev $md0 2 $mdsize1 512
+mdadm -S $md0
+
+done
diff --git a/tests/07revert-grow.broken b/tests/07revert-grow.broken
new file mode 100644
index 0000000..9b6db86
--- /dev/null
+++ b/tests/07revert-grow.broken
@@ -0,0 +1,31 @@
+always fails
+
+This patch, recently added to md-next causes the test to always fail:
+
+7e6ba434cc60 ("md: don't unregister sync_thread with reconfig_mutex held")
+
+The errors are:
+
+    mdadm: No active reshape to revert on /dev/loop0
+    ERROR: active raid5 not found
+
+Before the patch, the error seen is below.
+
+--
+
+fails rarely
+
+Fails about 1 in every 30 runs with errors:
+
+    mdadm: Merging with already-assembled /dev/md/0
+    mdadm: backup file /tmp/md-backup inaccessible: No such file or directory
+    mdadm: failed to add /dev/loop1 to /dev/md/0: Invalid argument
+    mdadm: failed to add /dev/loop2 to /dev/md/0: Invalid argument
+    mdadm: failed to add /dev/loop3 to /dev/md/0: Invalid argument
+    mdadm: failed to add /dev/loop0 to /dev/md/0: Invalid argument
+    mdadm: /dev/md/0 assembled from 1 drive - need all 5 to start it
+            (use --run to insist).
+
+    grep: /sys/block/md*/md/sync_action: No such file or directory
+
+    ERROR: active raid5 not found