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xfs: factor out a xfs_setup_dax_always helper

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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 <dan.j.williams@intel.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/20211129102203.2243509-8-hch@lst.de
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Christoph Hellwig 2021-11-29 11:21:41 +01:00 committed by Dan Williams
parent 0c44587138
commit 679a99495b
1 changed files with 28 additions and 19 deletions
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47
fs/xfs/xfs_super.c
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@ -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)) {