xfs: delegate dqget input checks to helper function

Move the dqget input checks to a separate function in preparation for
splitting up the dqget functionality.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2018-05-04 15:30:21 -07:00
commit d7103eeb00