xfs_scrub: retry incomplete repairs

If a repair says it didn't do anything on account of not being able to
complete a scan of the metadata, retry the repair a few times; if even
that doesn't work, we can delay it to phase 4.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
3 files changed