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

[Allison Henderson <allison.henderson@xxxxxxxxxx>]

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@xxxxxxxxxx>
---
 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