The patch titled
Subject: xfs: fail dax mount if reflink is enabled on a partition
has been added to the -mm mm-unstable branch. Its filename is
xfs-fail-dax-mount-if-reflink-is-enabled-on-a-partition.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/xfs-fail-dax-mount-if-reflink-is-enabled-on-a-partition.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
Subject: xfs: fail dax mount if reflink is enabled on a partition
Date: Thu, 9 Jun 2022 22:34:35 +0800
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@xxxxxxxxxxx
Signed-off-by: Shiyang Ruan <ruansy.fnst@xxxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Darrick J. Wong <djwong@xxxxxxxxxx>
Cc: Dave Chinner <david@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/xfs/xfs_super.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/fs/xfs/xfs_super.c~xfs-fail-dax-mount-if-reflink-is-enabled-on-a-partition
+++ a/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;
}
_
Patches currently in -mm which might be from ruansy.fnst@xxxxxxxxxxx are
xfs-fail-dax-mount-if-reflink-is-enabled-on-a-partition.patch
