[PATCH V4 10/20] xfsprogs: Introduce XFS_DIFLAG2_NREXT64 and associated helpers

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

This commit adds the new per-inode flag XFS_DIFLAG2_NREXT64 to indicate that
an inode supports 64-bit extent counters. This flag is also enabled by default
on newly created inodes when the corresponding filesystem has large extent
counter feature bit (i.e. XFS_FEAT_NREXT64) set.

Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
---
 db/inode.c          |  3 +++
 include/xfs_inode.h |  5 +++++
 libxfs/xfs_format.h | 10 +++++++++-
 libxfs/xfs_ialloc.c |  2 ++
 4 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/db/inode.c b/db/inode.c
index 9afa6426..b1f92d36 100644
--- a/db/inode.c
+++ b/db/inode.c
@@ -178,6 +178,9 @@ const field_t	inode_v3_flds[] = {
 	{ "bigtime", FLDT_UINT1,
 	  OI(COFF(flags2) + bitsz(uint64_t) - XFS_DIFLAG2_BIGTIME_BIT - 1), C1,
 	  0, TYP_NONE },
+	{ "nrext64", FLDT_UINT1,
+	  OI(COFF(flags2) + bitsz(uint64_t) - XFS_DIFLAG2_NREXT64_BIT-1), C1,
+	  0, TYP_NONE },
 	{ NULL }
 };
 
diff --git a/include/xfs_inode.h b/include/xfs_inode.h
index 08a62d83..79a5c526 100644
--- a/include/xfs_inode.h
+++ b/include/xfs_inode.h
@@ -164,6 +164,11 @@ static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip)
 	return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME;
 }
 
+static inline bool xfs_inode_has_nrext64(struct xfs_inode *ip)
+{
+	return ip->i_diflags2 & XFS_DIFLAG2_NREXT64;
+}
+
 typedef struct cred {
 	uid_t	cr_uid;
 	gid_t	cr_gid;
diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index 23ecbc7d..58186f2b 100644
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -1180,15 +1180,17 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
 #define XFS_DIFLAG2_REFLINK_BIT	1	/* file's blocks may be shared */
 #define XFS_DIFLAG2_COWEXTSIZE_BIT   2  /* copy on write extent size hint */
 #define XFS_DIFLAG2_BIGTIME_BIT	3	/* big timestamps */
+#define XFS_DIFLAG2_NREXT64_BIT 4	/* 64-bit extent counter enabled */
 
 #define XFS_DIFLAG2_DAX		(1 << XFS_DIFLAG2_DAX_BIT)
 #define XFS_DIFLAG2_REFLINK     (1 << XFS_DIFLAG2_REFLINK_BIT)
 #define XFS_DIFLAG2_COWEXTSIZE  (1 << XFS_DIFLAG2_COWEXTSIZE_BIT)
 #define XFS_DIFLAG2_BIGTIME	(1 << XFS_DIFLAG2_BIGTIME_BIT)
+#define XFS_DIFLAG2_NREXT64	(1 << XFS_DIFLAG2_NREXT64_BIT)
 
 #define XFS_DIFLAG2_ANY \
 	(XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \
-	 XFS_DIFLAG2_BIGTIME)
+	 XFS_DIFLAG2_BIGTIME | XFS_DIFLAG2_NREXT64)
 
 static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip)
 {
@@ -1196,6 +1198,12 @@ static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip)
 	       (dip->di_flags2 & cpu_to_be64(XFS_DIFLAG2_BIGTIME));
 }
 
+static inline bool xfs_dinode_has_nrext64(const struct xfs_dinode *dip)
+{
+	return dip->di_version >= 3 &&
+	       (dip->di_flags2 & cpu_to_be64(XFS_DIFLAG2_NREXT64));
+}
+
 /*
  * Inode number format:
  * low inopblog bits - offset in block
diff --git a/libxfs/xfs_ialloc.c b/libxfs/xfs_ialloc.c
index 570349b8..77501317 100644
--- a/libxfs/xfs_ialloc.c
+++ b/libxfs/xfs_ialloc.c
@@ -2770,6 +2770,8 @@ xfs_ialloc_setup_geometry(
 	igeo->new_diflags2 = 0;
 	if (xfs_sb_version_hasbigtime(&mp->m_sb))
 		igeo->new_diflags2 |= XFS_DIFLAG2_BIGTIME;
+	if (xfs_sb_version_hasnrext64(&mp->m_sb))
+		igeo->new_diflags2 |= XFS_DIFLAG2_NREXT64;
 
 	/* Compute inode btree geometry. */
 	igeo->agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
-- 
2.30.2