xfs: create libxfs helper to exchange two directory entries

Create a new libxfs function to exchange two directory entries.
The upcoming metadata directory feature will need this to replace a
metadata inode directory entry.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2024-07-02 11:22:46 -07:00
commit a55712b35c
3 changed files with 142 additions and 98 deletions