On 10/19/2017 12:45 PM, Darrick J. Wong wrote:
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
Sure, I will add a warning blurb in there
--
2.7.4
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