Re: [RFC PATCH 13/13] Add the parent pointer support to the superblock version 5.

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On Wed, Aug 09, 2017 at 06:41:33PM -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>
> ---
> :100644 100644 6cedd75... b00bf1d... M	fs/xfs/libxfs/xfs_format.h
> :100644 100644 fba0105... a18dd0c... M	fs/xfs/libxfs/xfs_fs.h
> :100644 100644 50fb3a2... d7b9010... M	fs/xfs/xfs_fsops.c
>  fs/xfs/libxfs/xfs_format.h | 13 ++++++++-----
>  fs/xfs/libxfs/xfs_fs.h     |  1 +
>  fs/xfs/xfs_fsops.c         |  4 +++-
>  3 files changed, 12 insertions(+), 6 deletions(-)
> 
> diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
> index 6cedd75..b00bf1d 100644
> --- a/fs/xfs/libxfs/xfs_format.h
> +++ b/fs/xfs/libxfs/xfs_format.h
> @@ -464,10 +464,12 @@ 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(
> @@ -507,17 +509,17 @@ xfs_sb_has_incompat_log_feature(
>  /*
>   * V5 superblock specific feature checks
>   */
> -static inline int xfs_sb_version_hascrc(struct xfs_sb *sbp)
> +static inline bool xfs_sb_version_hascrc(struct xfs_sb *sbp)
>  {
>  	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
>  }
>  
> -static inline int xfs_sb_version_has_pquotino(struct xfs_sb *sbp)
> +static inline bool xfs_sb_version_has_pquotino(struct xfs_sb *sbp)

Not part of parent pointers; if you want to fix this, do it in a separate
patch, please.

--D

>  {
>  	return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
>  }
>  
> -static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp)
> +static inline bool xfs_sb_version_hasftype(struct xfs_sb *sbp)
>  {
>  	return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
>  		xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) ||
> @@ -563,7 +565,8 @@ 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 fba0105..a18dd0c 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 50fb3a2..d7b9010 100644
> --- a/fs/xfs/xfs_fsops.c
> +++ b/fs/xfs/xfs_fsops.c
> @@ -112,7 +112,9 @@ 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;
> -- 
> 2.7.4
> 
> --
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