xfs_scrub_all: fail fast on masked units

If xfs_scrub_all tries to start a masked xfs_scrub@ unit, that's a sign
that the system administrator really didn't want us to scrub that
filesystem.  Instead of retrying pointlessly, just make a note of the
failure and move on.

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