Commit 35fcd75a authored by Shiyang Ruan's avatar Shiyang Ruan Committed by Andrew Morton
Browse files

xfs: fail dax mount if reflink is enabled on a partition 

Failure notification is not supported on partitions.  So, when we mount a
reflink enabled xfs on a partition with dax option, let it fail with
-EINVAL code.

Link: https://lkml.kernel.org/r/20220609143435.393724-1-ruansy.fnst@fujitsu.com


Signed-off-by: default avatarShiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarDarrick J. Wong <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 873f64b7

fs/xfs/xfs_super.c

+4 −2
Original line number Diff line number Diff line
@@ -350,8 +350,10 @@ xfs_setup_dax_always( 
		goto disable_dax;

	}



	if (xfs_has_reflink(mp)) {

		xfs_alert(mp, "DAX and reflink cannot be used together!");

	if (xfs_has_reflink(mp) &&

	    bdev_is_partition(mp->m_ddev_targp->bt_bdev)) {

		xfs_alert(mp,

			"DAX and reflink cannot work with multi-partitions!");

		return -EINVAL;

	}