From 35fcd75af3edf035638e632bb49607cc8fc3cdf4 Mon Sep 17 00:00:00 2001
From: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Date: Thu, 9 Jun 2022 22:34:35 +0800
Subject: [PATCH] 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: Shiyang Ruan <ruansy.fnst@fujitsu.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
fs/xfs/xfs_super.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index ed18160e6181c..c440e90fecef0 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -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;
}
--
2.30.2