[PATCH V7 08/18] xfsprogs: Introduce XFS_SB_FEAT_INCOMPAT_NREXT64 and associated per-fs feature bit

[Chandan Babu R <chandan.babu@oracle.com>]

XFS_SB_FEAT_INCOMPAT_NREXT64 incompat feature bit will be set on filesystems
which support large per-inode extent counters. This commit defines the new
incompat feature bit and the corresponding per-fs feature bit (along with
inline functions to work on it).

Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
---
 db/sb.c             | 2 ++
 include/xfs_mount.h | 2 ++
 libxfs/xfs_format.h | 1 +
 libxfs/xfs_sb.c     | 3 +++
 4 files changed, 8 insertions(+)

diff --git a/db/sb.c b/db/sb.c
index 7510e00f..2d508c26 100644
--- a/db/sb.c
+++ b/db/sb.c
@@ -704,6 +704,8 @@ version_string(
 		strcat(s, ",BIGTIME");
 	if (xfs_has_needsrepair(mp))
 		strcat(s, ",NEEDSREPAIR");
+	if (xfs_has_large_extent_counts(mp))
+		strcat(s, ",NREXT64");
 	return s;
 }
 
diff --git a/include/xfs_mount.h b/include/xfs_mount.h
index 8139831b..f05eb2af 100644
--- a/include/xfs_mount.h
+++ b/include/xfs_mount.h
@@ -154,6 +154,7 @@ typedef struct xfs_mount {
 #define XFS_FEAT_INOBTCNT	(1ULL << 23)	/* inobt block counts */
 #define XFS_FEAT_BIGTIME	(1ULL << 24)	/* large timestamps */
 #define XFS_FEAT_NEEDSREPAIR	(1ULL << 25)	/* needs xfs_repair */
+#define XFS_FEAT_NREXT64	(1ULL << 26)	/* large extent counters */
 
 #define __XFS_HAS_FEAT(name, NAME) \
 static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
@@ -197,6 +198,7 @@ __XFS_HAS_FEAT(realtime, REALTIME)
 __XFS_HAS_FEAT(inobtcounts, INOBTCNT)
 __XFS_HAS_FEAT(bigtime, BIGTIME)
 __XFS_HAS_FEAT(needsrepair, NEEDSREPAIR)
+__XFS_HAS_FEAT(large_extent_counts, NREXT64)
 
 /* Kernel mount features that we don't support */
 #define __XFS_UNSUPP_FEAT(name) \
diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index b5e9256d..cae7ffd5 100644
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -372,6 +372,7 @@ xfs_sb_has_ro_compat_feature(
 #define XFS_SB_FEAT_INCOMPAT_META_UUID	(1 << 2)	/* metadata UUID */
 #define XFS_SB_FEAT_INCOMPAT_BIGTIME	(1 << 3)	/* large timestamps */
 #define XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR (1 << 4)	/* needs xfs_repair */
+#define XFS_SB_FEAT_INCOMPAT_NREXT64	(1 << 5)	/* 64-bit data fork extent counter */
 #define XFS_SB_FEAT_INCOMPAT_ALL \
 		(XFS_SB_FEAT_INCOMPAT_FTYPE|	\
 		 XFS_SB_FEAT_INCOMPAT_SPINODES|	\
diff --git a/libxfs/xfs_sb.c b/libxfs/xfs_sb.c
index 986f9466..7ab13e07 100644
--- a/libxfs/xfs_sb.c
+++ b/libxfs/xfs_sb.c
@@ -122,6 +122,9 @@ xfs_sb_version_to_features(
 		features |= XFS_FEAT_BIGTIME;
 	if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR)
 		features |= XFS_FEAT_NEEDSREPAIR;
+	if (sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_NREXT64)
+		features |= XFS_FEAT_NREXT64;
+
 	return features;
 }
 
-- 
2.30.2