Support overlayfs testing.

Li Mengyang
2014-11-15T20:41:43Z

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Hi,
Recently people are proposing overlayfs for inclusion into the mainline, I
found it could be helpful if xfstests supports overlayfs testing. Here is
the patch and example configuration file for that. Thank you.

--
Regards,
Li
--------------------------------------
Mengyang Li / Computer Science, SUNYSB

6315047325/ li.mengyang@stonybrook.edu

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From 4efafe0f4311bc9140a667370576fde24b84fecb Mon Sep 17 00:00:00 2001
From: Mengyang Li <li.mengyang@stonybrook.edu>
Date: Sat, 15 Nov 2014 10:53:41 -0500
Subject: [PATCH 1/1] overlayfs: Add support for overlayfs

Signed-off-by: Mengyang Li <li.mengyang@stonybrook.edu>
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
---
common/rc | 21 +++++++++++++++++++++
configs/overlayfs.config | 16 ++++++++++++++++
2 files changed, 37 insertions(+)
create mode 100644 configs/overlayfs.config

diff --git a/common/rc b/common/rc
index d5e3aff..efa0fac 100644
--- a/common/rc
+++ b/common/rc
@@ -1133,6 +1133,24 @@ _require_test()
_notrun "this test requires a valid \$TEST_DIR and unique $TEST_DEV"
fi
;;
+ overlayfs)
+ if [ -z "$OVLFS_LOWERDIR" -o ! -d "$OVLFS_LOWERDIR" ];
+ then
+ _notrun "this test requires a valid \$OVLFS_LOWERDIR"
+ fi
+ if [ -z "$OVLFS_UPPERDIR" -o ! -d "$OVLFS_UPPERDIR" ];
+ then
+ _notrun "this test requires a valid \$OVLFS_UPPERDIR"
+ fi
+ if [ -z "$OVLFS_WORKDIR" -o ! -d "$OVLFS_WORKDIR" ];
+ then
+ _notrun "this test requires a valid \$OVLFS_WORKDIR"
+ fi
+ if [ -z "$TEST_DIR" -o ! -d "$TEST_DIR" ];
+ then
+ _notrun "this test requires a valid \$TEST_DIR"
+ fi
+ ;;
*)
if [ -z "$TEST_DEV" -o "`_is_block_dev $TEST_DEV`" = "" ]
then
@@ -1947,6 +1965,9 @@ _check_test_fs()
tmpfs)
# no way to check consistency for tmpfs
;;
+ overlayfs)
+ # no way to check consistency for overlayfs
+ ;;
*)
_check_generic_filesystem $TEST_DEV
;;
diff --git a/configs/overlayfs.config b/configs/overlayfs.config
new file mode 100644
index 0000000..42ef975
--- /dev/null
+++ b/configs/overlayfs.config
@@ -0,0 +1,16 @@
+# Example config for overlayfs
+# source me before run ./check
+
+export OVLFS_LOWERDIR=/mnt/ovllower
+export OVLFS_UPPERDIR=/mnt/ovlupper
+export OVLFS_WORKDIR=/mnt/workdir
+
+export TEST_DIR=/mnt/merged
+export TEST_DEV=/dev/loop0
+
+export TEST_FS_MOUNT_OPTS=-olowerdir=$OVLFS_LOWERDIR,\
+upperdir=$OVLFS_UPPERDIR,workdir=$OVLFS_WORKDIR
+
+unset SCRATCH_DEV
+unset SCRATCH_MNT
+export FSTYP=overlayfs
--
1.7.9.5

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