[PATCH v13 07/10] xfs: Add feature bit XFS_SB_FEAT_INCOMPAT_LOG_DELATTR

Allison Henderson
2020-10-23T06:34:46Z

This patch adds a new feature bit XFS_SB_FEAT_INCOMPAT_LOG_DELATTR which
can be used to control turning on/off delayed attributes

Signed-off-by: Allison Henderson <allison.henderson@oracle.com>
---
fs/xfs/libxfs/xfs_format.h | 8 ++++++--
fs/xfs/libxfs/xfs_fs.h | 1 +
fs/xfs/libxfs/xfs_sb.c | 2 ++
fs/xfs/xfs_super.c | 3 +++
4 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index d419c34..18b41a7 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -483,7 +483,9 @@ xfs_sb_has_incompat_feature(
return (sbp->sb_features_incompat & feature) != 0;
}

-#define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
+#define XFS_SB_FEAT_INCOMPAT_LOG_DELATTR (1 << 0) /* Delayed Attributes */
+#define XFS_SB_FEAT_INCOMPAT_LOG_ALL \
+ (XFS_SB_FEAT_INCOMPAT_LOG_DELATTR)
#define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
static inline bool
xfs_sb_has_incompat_log_feature(
@@ -586,7 +588,9 @@ static inline bool xfs_sb_version_hasinobtcounts(struct xfs_sb *sbp)

static inline bool xfs_sb_version_hasdelattr(struct xfs_sb *sbp)
{
- return false;
+ return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
+ (sbp->sb_features_log_incompat &
+ XFS_SB_FEAT_INCOMPAT_LOG_DELATTR));
}

/*
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index 2a2e3cf..f703d95 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -250,6 +250,7 @@ typedef struct xfs_fsop_resblks {
#define XFS_FSOP_GEOM_FLAGS_RMAPBT (1 << 19) /* reverse mapping btree */
#define XFS_FSOP_GEOM_FLAGS_REFLINK (1 << 20) /* files can share blocks */
#define XFS_FSOP_GEOM_FLAGS_BIGTIME (1 << 21) /* 64-bit nsec timestamps */
+#define XFS_FSOP_GEOM_FLAGS_DELATTR (1 << 22) /* delayed attributes */

/*
* Minimum and maximum sizes need for growth checks.
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index 5aeafa5..a0ec327 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -1168,6 +1168,8 @@ xfs_fs_geometry(
geo->flags |= XFS_FSOP_GEOM_FLAGS_REFLINK;
if (xfs_sb_version_hasbigtime(sbp))
geo->flags |= XFS_FSOP_GEOM_FLAGS_BIGTIME;
+ if (xfs_sb_version_hasdelattr(sbp))
+ geo->flags |= XFS_FSOP_GEOM_FLAGS_DELATTR;
if (xfs_sb_version_hassector(sbp))
geo->logsectsize = sbp->sb_logsectsize;
else
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index d1b5f2d..bb85884 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -1580,6 +1580,9 @@ xfs_fc_fill_super(
if (xfs_sb_version_hasinobtcounts(&mp->m_sb))
xfs_warn(mp,
"EXPERIMENTAL inode btree counters feature in use. Use at your own risk!");
+ if (xfs_sb_version_hasdelattr(&mp->m_sb))
+ xfs_alert(mp,
+ "EXPERIMENTAL delayed attrs feature enabled. Use at your own risk!");

error = xfs_mountfs(mp);
if (error)
--
2.7.4