On Wed, Oct 18, 2017 at 03:55:33PM -0700, Allison Henderson wrote:
> [dchinner: forward ported and cleaned up]
> [achender: rebased and added parent pointer attribute to
> compatible attributes mask]
>
> Signed-off-by: Mark Tinguely <tinguely@xxxxxxx>
> Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
> Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
> ---
> v2: remove unrelated type clean up in xfs_format.h
>
> Signed-off-by: Allison Henderson <allison.henderson@xxxxxxxxxx>
> ---
> fs/xfs/libxfs/xfs_format.h | 7 +++++--
> fs/xfs/libxfs/xfs_fs.h | 1 +
> fs/xfs/xfs_fsops.c | 4 +++-
> 3 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
> index 121862a..f3e3132 100644
> --- a/fs/xfs/libxfs/xfs_format.h
> +++ b/fs/xfs/libxfs/xfs_format.h
> @@ -459,10 +459,12 @@ xfs_sb_has_compat_feature(
> #define XFS_SB_FEAT_RO_COMPAT_FINOBT (1 << 0) /* free inode btree */
> #define XFS_SB_FEAT_RO_COMPAT_RMAPBT (1 << 1) /* reverse map btree */
> #define XFS_SB_FEAT_RO_COMPAT_REFLINK (1 << 2) /* reflinked files */
> +#define XFS_SB_FEAT_RO_COMPAT_PARENT (1 << 3) /* parent inode ptr */
> #define XFS_SB_FEAT_RO_COMPAT_ALL \
> (XFS_SB_FEAT_RO_COMPAT_FINOBT | \
> XFS_SB_FEAT_RO_COMPAT_RMAPBT | \
> - XFS_SB_FEAT_RO_COMPAT_REFLINK)
> + XFS_SB_FEAT_RO_COMPAT_REFLINK| \
> + XFS_SB_FEAT_RO_COMPAT_PARENT)
> #define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
> static inline bool
> xfs_sb_has_ro_compat_feature(
> @@ -558,7 +560,8 @@ static inline bool xfs_sb_version_hasreflink(struct xfs_sb *sbp)
>
> static inline bool xfs_sb_version_hasparent(struct xfs_sb *sbp)
> {
> - return false; /* We'll enable this at the end of the set */
> + return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
> + (sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_PARENT));
> }
>
> /*
> diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
> index 8c61f21..b8108f8 100644
> --- a/fs/xfs/libxfs/xfs_fs.h
> +++ b/fs/xfs/libxfs/xfs_fs.h
> @@ -222,6 +222,7 @@ typedef struct xfs_fsop_resblks {
> #define XFS_FSOP_GEOM_FLAGS_SPINODES 0x40000 /* sparse inode chunks */
> #define XFS_FSOP_GEOM_FLAGS_RMAPBT 0x80000 /* reverse mapping btree */
> #define XFS_FSOP_GEOM_FLAGS_REFLINK 0x100000 /* files can share blocks */
> +#define XFS_FSOP_GEOM_FLAGS_PARENT 0x200000 /* parent pointers */
>
> /*
> * Minimum and maximum sizes need for growth checks.
> diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
> index 8f22fc5..9a0ce52 100644
> --- a/fs/xfs/xfs_fsops.c
> +++ b/fs/xfs/xfs_fsops.c
> @@ -111,7 +111,9 @@ xfs_fs_geometry(
> (xfs_sb_version_hasrmapbt(&mp->m_sb) ?
> XFS_FSOP_GEOM_FLAGS_RMAPBT : 0) |
> (xfs_sb_version_hasreflink(&mp->m_sb) ?
> - XFS_FSOP_GEOM_FLAGS_REFLINK : 0);
> + XFS_FSOP_GEOM_FLAGS_REFLINK : 0) |
> + (xfs_sb_version_hasparent(&mp->m_sb) ?
> + XFS_FSOP_GEOM_FLAGS_PARENT : 0);
> geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
> mp->m_sb.sb_logsectsize : BBSIZE;
> geo->rtsectsize = mp->m_sb.sb_blocksize;
xfs_fs_fill_super ought to have a warning about parent pointers being
experimental.
--D
> --
> 2.7.4
>
> --
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