An easy way to accomplish this is by running './check <some test>' once,
before running './check -overlay'.
+'./check -overlay' support check overlay test and scratch dirs,
+OVERLAY_FSCK_OPTIONS should be set instead of FSCK_OPTIONS if fsck
+options need to given directly.
+
Because of the lack of mkfs support, multi-section config files are only
partly supported with './check -overlay'. Only multi-section files that
do not change FSTYP and MKFS_OPTIONS can be safely used with -overlay.
MOUNT_OPTIONS="-o pquota"
TEST_FS_MOUNT_OPTS="-o noatime"
OVERLAY_MOUNT_OPTIONS="-o redirect_dir=off"
+ OVERLAY_FSCK_OPTIONS="-n -o redirect_dir=off"
In the example above, MOUNT_OPTIONS will be used to mount the base scratch fs,
-TEST_FS_MOUNT_OPTS will be used to mount the base test fs and
-OVERLAY_MOUNT_OPTIONS will be used to mount both test and scratch overlays.
+TEST_FS_MOUNT_OPTS will be used to mount the base test fs,
+OVERLAY_MOUNT_OPTIONS will be used to mount both test and scratch overlay and
+OVERLAY_FSCK_OPTIONS will be used to check both test and scratch overlay.
+
+
+Unionmount Testsuite
+====================
+
+xfstests can be used as a test harness to run unionmount testsuite test cases
+and provide extended test coverage for overlayfs.
+
+To enable running unionmount testsuite, clone the git repository from:
+ https://github.com/amir73il/unionmount-testsuite.git
+under the xfstests src directory, or set the environment variable
+UNIONMOUNT_TESTSUITE to the local path where the repository was cloned.
+
+Run './check -overlay -g overlay/union' to execute all the unionmount testsuite
+test cases.