[PATCH 07/29] xfs: factor out a xfs_setup_dax_always helper
flat view
STALE1773d
LANDED: 2 (1M)
From: Christoph Hellwig <hch@lst.de>
Date: 2021-11-29 11:07:43
Also in:
dm-devel, linux-fsdevel, linux-s390, linux-xfs, nvdimm, virtualization
Subsystem:
filesystems (vfs and infrastructure), the rest, xfs filesystem · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds, Carlos Maiolino
2 review trailers; landed in mainline as 679a99495b8f on 2021-12-04.
Factor out another DAX setup helper to simplify future changes. Also move the experimental warning after the checks to not clutter the log too much if the setup failed. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dan Williams <redacted> Reviewed-by: Darrick J. Wong <djwong@kernel.org> --- fs/xfs/xfs_super.c | 47 +++++++++++++++++++++++++++------------------- 1 file changed, 28 insertions(+), 19 deletions(-)
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index e21459f9923a8..875fd3151d6c9 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c@@ -340,6 +340,32 @@ xfs_buftarg_is_dax( bdev_nr_sectors(bt->bt_bdev)); } +static int +xfs_setup_dax_always( + struct xfs_mount *mp) +{ + struct super_block *sb = mp->m_super; + + if (!xfs_buftarg_is_dax(sb, mp->m_ddev_targp) && + (!mp->m_rtdev_targp || !xfs_buftarg_is_dax(sb, mp->m_rtdev_targp))) { + xfs_alert(mp, + "DAX unsupported by block device. Turning off DAX."); + goto disable_dax; + } + + if (xfs_has_reflink(mp)) { + xfs_alert(mp, "DAX and reflink cannot be used together!"); + return -EINVAL; + } + + xfs_warn(mp, "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); + return 0; + +disable_dax: + xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER); + return 0; +} + STATIC int xfs_blkdev_get( xfs_mount_t *mp,
@@ -1593,26 +1619,9 @@ xfs_fs_fill_super( sb->s_flags |= SB_I_VERSION; if (xfs_has_dax_always(mp)) { - bool rtdev_is_dax = false, datadev_is_dax; - - xfs_warn(mp, - "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); - - datadev_is_dax = xfs_buftarg_is_dax(sb, mp->m_ddev_targp); - if (mp->m_rtdev_targp) - rtdev_is_dax = xfs_buftarg_is_dax(sb, - mp->m_rtdev_targp); - if (!rtdev_is_dax && !datadev_is_dax) { - xfs_alert(mp, - "DAX unsupported by block device. Turning off DAX."); - xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER); - } - if (xfs_has_reflink(mp)) { - xfs_alert(mp, - "DAX and reflink cannot be used together!"); - error = -EINVAL; + error = xfs_setup_dax_always(mp); + if (error) goto out_filestream_unmount; - } } if (xfs_has_discard(mp)) {
--
2.30.2