xfs: refactor superblock verifiers

Split the superblock verifier into the common checks, the read-time
checks, and the write-time check functions.  No functional changes, but
we're setting up to add more write-only checks.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-07-29 13:10:44 -07:00
commit eca383fcd6