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

Chandan Babu R
2021-12-14T08:50:03Z

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