On Wed, Jul 14, 2021 at 02:25:23PM -0700, Darrick J. Wong wrote:

From: Darrick J. Wong <djwong@kernel.org>

Improve the checking at the start of a realtime grow operation so that
we avoid accidentally set a new extent size that is too large and avoid
adding an rt volume to a filesystem with rmap or reflink because we
don't support rt rmap or reflink yet.

While we're at it, separate the checks so that we're only testing one
aspect at a time.

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>