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

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On 08/14/2017 05:07 PM, Darrick J. Wong wrote:

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

Ok, will drop for now. I may come back and get them later. Thanks for the review!

Allison

  {
  	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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