On Mon, Apr 14, 2025 at 07:36:19AM +0200, Christoph Hellwig wrote:
> Document the new zoned feature flag and the two new fields added
> with it.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Much better,
Reviewed-by: "Darrick J. Wong" <djwong@xxxxxxxxxx>
--D
> ---
> man/man2/ioctl_xfs_fsgeometry.2 | 21 ++++++++++++++++++++-
> 1 file changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/man/man2/ioctl_xfs_fsgeometry.2 b/man/man2/ioctl_xfs_fsgeometry.2
> index 502054f391e9..037f8e15e415 100644
> --- a/man/man2/ioctl_xfs_fsgeometry.2
> +++ b/man/man2/ioctl_xfs_fsgeometry.2
> @@ -50,7 +50,9 @@ struct xfs_fsop_geom {
> __u32 sick;
> __u32 checked;
> __u64 rgextents;
> - __u64 reserved[16];
> + __u64 rtstart;
> + __u64 rtreserved;
> + __u64 reserved[14];
> };
> .fi
> .in
> @@ -143,6 +145,20 @@ for more details.
> .I rgextents
> Is the number of RT extents in each rtgroup.
> .PP
> +.I rtstart
> +Start of the internal RT device in fsblocks. 0 if an external RT device
> +is used.
> +This field is meaningful only if the flag
> +.B XFS_FSOP_GEOM_FLAGS_ZONED
> +is set.
> +.PP
> +.I rtreserved
> +The amount of space in the realtime section that is reserved for internal use
> +by garbage collection and reorganization algorithms in fsblocks.
> +This field is meaningful only if the flag
> +.B XFS_FSOP_GEOM_FLAGS_ZONED
> +is set.
> +.PP
> .I reserved
> is set to zero.
> .SH FILESYSTEM FEATURE FLAGS
> @@ -221,6 +237,9 @@ Filesystem can exchange file contents atomically via XFS_IOC_EXCHANGE_RANGE.
> .TP
> .B XFS_FSOP_GEOM_FLAGS_METADIR
> Filesystem contains a metadata directory tree.
> +.TP
> +.B XFS_FSOP_GEOM_FLAGS_ZONED
> +Filesystem uses the zoned allocator for the RT device.
> .RE
> .SH XFS METADATA HEALTH REPORTING
> .PP
> --
> 2.47.2
>
>
