On Thu, Aug 26, 2021 at 12:30:12PM -0500, Bill O'Donnell wrote:
> When dax-mode was tri-stated by adding dax=inode case, the EXPERIMENTAL
> warning on mount was missed for the case. Add logic to handle the
> warning similar to that of the 'dax=always' case.
>
> Signed-off-by: Bill O'Donnell <bodonnel@xxxxxxxxxx>
> ---
> fs/xfs/xfs_mount.h | 2 ++
> fs/xfs/xfs_super.c | 8 +++++---
> 2 files changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
> index e091f3b3fa15..c9243a1b8d05 100644
> --- a/fs/xfs/xfs_mount.h
> +++ b/fs/xfs/xfs_mount.h
> @@ -277,6 +277,7 @@ typedef struct xfs_mount {
> #define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */
>
> /* Mount features */
> +#define XFS_FEAT_DAX_INODE (1ULL << 47) /* DAX enabled */
> #define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */
> #define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */
> #define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */
> @@ -359,6 +360,7 @@ __XFS_HAS_FEAT(swalloc, SWALLOC)
> __XFS_HAS_FEAT(filestreams, FILESTREAMS)
> __XFS_HAS_FEAT(dax_always, DAX_ALWAYS)
> __XFS_HAS_FEAT(dax_never, DAX_NEVER)
> +__XFS_HAS_FEAT(dax_inode, DAX_INODE)
> __XFS_HAS_FEAT(norecovery, NORECOVERY)
> __XFS_HAS_FEAT(nouuid, NOUUID)
>
> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> index 5e73ac78bf2f..f73f3687f0a8 100644
> --- a/fs/xfs/xfs_super.c
> +++ b/fs/xfs/xfs_super.c
> @@ -84,15 +84,16 @@ xfs_mount_set_dax_mode(
> {
> switch (mode) {
> case XFS_DAX_INODE:
> + mp->m_features |= XFS_FEAT_DAX_INODE;
> mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER);
> break;
> case XFS_DAX_ALWAYS:
> mp->m_features |= XFS_FEAT_DAX_ALWAYS;
> - mp->m_features &= ~XFS_FEAT_DAX_NEVER;
> + mp->m_features &= ~(XFS_FEAT_DAX_NEVER | XFS_FEAT_DAX_INODE);
> break;
> case XFS_DAX_NEVER:
> mp->m_features |= XFS_FEAT_DAX_NEVER;
> - mp->m_features &= ~XFS_FEAT_DAX_ALWAYS;
> + mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_INODE);
> break;
> }
> }
> @@ -189,6 +190,7 @@ xfs_fs_show_options(
> { XFS_FEAT_LARGE_IOSIZE, ",largeio" },
> { XFS_FEAT_DAX_ALWAYS, ",dax=always" },
> { XFS_FEAT_DAX_NEVER, ",dax=never" },
> + { XFS_FEAT_DAX_INODE, ",dax=inode" },
> { 0, NULL }
> };
> struct xfs_mount *mp = XFS_M(root->d_sb);
> @@ -1584,7 +1586,7 @@ xfs_fs_fill_super(
> if (xfs_has_crc(mp))
> sb->s_flags |= SB_I_VERSION;
>
> - if (xfs_has_dax_always(mp)) {
> + if (xfs_has_dax_always(mp) || xfs_has_dax_inode(mp)) {
Er... can't this be done without burning another feature bit by:
if (xfs_has_dax_always(mp) || (!xfs_has_dax_always(mp) &&
!xfs_has_dax_never(mp))) {
...
xfs_warn(mp, "DAX IS EXPERIMENTAL");
}
--D
> bool rtdev_is_dax = false, datadev_is_dax;
>
> xfs_warn(mp,
> --
> 2.31.1
>
