[PATCH 0/4] fstests: fixes for config option OVERLAY_MOUNT_OPTIONS

Amir Goldstein
2017-09-27T07:03:41Z

Eryu,

Since v4.13, overlayfs supports mount option index=on/off per mount
and kernel config option CONFIG_OVERLAY_FS_INDEX that sets the default
system wide value when mount option is not specified.

The behavior of overlayfs may differ for index=on/off, specifically
for hardlinks. It is therefore important to be able to test overlayfs
with both index=on/off.

To that end exists the OVERLAY_MOUNT_OPTIONS config option, only
when I tried to use it I found it was broken in more than one way.
This series fixed the use of OVERLAY_MOUNT_OPTIONS and refactors
some customized overlay mount helpers along the way.

NOTE for users of kvm-xfstests, this test-appliance change is also
required for invoking kvm-xfstests -m index=on/off
https://github.com/tytso/xfstests-bld/pull/4

Amir Goldstein (4):
overlay: remove stale implementation of _scratch_mount_options
overlay: use default overlay mount options _overlay_mount_dirs()
overlay: create helper _overlay_scratch_mount_dirs()
overlay: fix _overlay_config_override of MOUNT_OPTIONS

common/config | 4 ++++
common/rc | 36 ++++++++++++++++--------------------
tests/overlay/005 | 2 +-
tests/overlay/010 | 3 +--
tests/overlay/014 | 8 +++-----
tests/overlay/031 | 11 +++++------
tests/overlay/035 | 3 +--
tests/overlay/037 | 14 ++++++--------
tests/overlay/038 | 3 +--
9 files changed, 38 insertions(+), 46 deletions(-)

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2.7.4