[PATCH 0/5 V2] xfs: RENAME_WHITEOUT support

[Dave Chinner <david@fromorbit.com>]

Hi folks,

This is the second version of the RENAME_WHITEOUT patchset that I
originally posted here:

http://oss.sgi.com/pipermail/xfs/2015-February/040378.html

This is mainly the breakup and restructuring of the patchset I
mention that needed to be done, as well as addressing the comments
that were made at the time (e.g. wino -> wip).

The patchset has been split into 5 patches, the first four are
really cleanup and factoring patches to make the rename and inode
locking code a bit simpler and easier to understand. The last patch
then introduces the RENAME_WHITEOUT functionality, which ends up
being surprisingly little code....

The changes pass xfstests, but I have not run them on overlayfs at
all yet, so I don't know if that's going to result in smoke and
tears yet. Still, getting the patch set out for review now is more
important that waiting for testing because there is relatively
little time left before the 4.1 merge window opens up....

So, comments, thoughts and flames are more than welcome.

-Dave.

Diffstat:

fs/xfs/xfs_inode.c | 408 ++++++++++++++++++++++++++++++++-----------------------
fs/xfs/xfs_iops.c  |   2 +-
2 files changed, 239 insertions(+), 171 deletions(-)

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