From 679a99495b8fda800037b25af8cd990eb7dd72c9 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 29 Nov 2021 11:21:41 +0100 Subject: [PATCH] xfs: factor out a xfs_setup_dax_always helper 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 Reviewed-by: Dan Williams Reviewed-by: Darrick J. Wong Link: https://lore.kernel.org/r/20211129102203.2243509-8-hch@lst.de Signed-off-by: Dan Williams --- 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 e21459f..875fd31 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)) { -- 2.7.4