xfs: support realtime reflink with an extent size that isn't a power of 2realtime-reflink-extsize_2022-11-09

Add the necessary alignment checking code to the reflink remap code to
ensure that remap requests are aligned to rt extent boundaries if the
realtime extent size isn't a power of two.  The VFS helpers assume that
they can use the usual (blocksize - 1) masking to avoid slow 64-bit
division, but since XFS is special we won't make everyone pay that cost
for our weird edge case.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>

0 files changed, 0 insertions, 0 deletions