On Tue, Jan 09, 2018 at 09:05:41AM +0800, Anand Jain wrote:
> btrfs-progs uses super flag bit BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34).
> So just define that in kernel so that we know its been used.
>
> Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
> ---
> fs/btrfs/disk-io.c | 3 ++-
> include/uapi/linux/btrfs_tree.h | 1 +
> 2 files changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
> index a69e5944dc08..7cd4935f690f 100644
> --- a/fs/btrfs/disk-io.c
> +++ b/fs/btrfs/disk-io.c
> @@ -61,7 +61,8 @@
> BTRFS_HEADER_FLAG_RELOC |\
> BTRFS_SUPER_FLAG_ERROR |\
> BTRFS_SUPER_FLAG_SEEDING |\
> - BTRFS_SUPER_FLAG_METADUMP)
> + BTRFS_SUPER_FLAG_METADUMP |\
> + BTRFS_SUPER_FLAG_METADUMP_V2)
>
> static const struct extent_io_ops btree_extent_io_ops;
> static void end_workqueue_fn(struct btrfs_work *work);
> diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h
> index 6d6e5da51527..38ab0e06259a 100644
> --- a/include/uapi/linux/btrfs_tree.h
> +++ b/include/uapi/linux/btrfs_tree.h
> @@ -456,6 +456,7 @@ struct btrfs_free_space_header {
>
> #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
> #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
> +#define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
>
>
> /*
> --
> 2.15.0
>
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