[PATCH 0/2] Add support to RENAME_EXCHANGE flat to XFS V3

[Carlos Maiolino <cmaiolino@redhat.com>]

This patchset aims to implement RENAME_EXCHANGE support (from sys_renameat2) to
XFS.

For this to be achieved, XFS need to export a rename2() method, which I included
in the first patch.

The second patch is the real implementation of the RENAME_EXCHANGE flags, which
most of the work I based on xfs_rename().

This patchset passed the xfstests 23, 24 and 25 (specifically for
RENAME_EXCHANGE), and I also tested the projectID inheritance problem, where
both paths must be under the same projectID to be able to change (I'm going to
implement this test into the xfstests too).

In this version of the patch, I tried to use xfs_rename for everything in
common between a usual rename and the RENAME_EXCHANGE, using xfs_cross_rename()
just for the needed stuff to accomplish RENAME_EXCHANGE requirements (as
suggested by Brian).

Carlos Maiolino (2):
  Make xfs_vn_rename compliant with renameat2() syscall
  Add support to RENAME_EXCHANGE flag

 fs/xfs/xfs_inode.c | 325 +++++++++++++++++++++++++++++++++++------------------
 fs/xfs/xfs_inode.h |   7 +-
 fs/xfs/xfs_iops.c  |  15 ++-
 3 files changed, 233 insertions(+), 114 deletions(-)

-- 
2.1.0

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