xfs: Introduce XFS_SB_FEAT_INCOMPAT_NREXT64 and associated per-fs feature bit

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).

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index b5e9256d6d328a86e7d57a6b67c473cc6ba6ddec..64ff0c310696e5a531ecdb10ca50658234363826 100644 (file)
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/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)        /* large extent counters */
 #define XFS_SB_FEAT_INCOMPAT_ALL \
                (XFS_SB_FEAT_INCOMPAT_FTYPE|    \
                 XFS_SB_FEAT_INCOMPAT_SPINODES| \

diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index f4e84aa1d50a4b267d844d78613eda67eb6c61a3..bd632389ae9255c30bfd3ee74c991e34fd71a9bf 100644 (file)
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -124,6 +124,9 @@ 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;
 }
 

diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index f6dc19de8322a6f104672bb61d53b8983e9b8566..98ceccdbcf511b30eb4d319e0d53697cd788a5a4 100644 (file)
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -276,6 +276,7 @@ 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 */
 
 /* Mount features */
 #define XFS_FEAT_NOATTR2       (1ULL << 48)    /* disable attr2 creation */
@@ -338,6 +339,7 @@ __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)
 
 /*
  * Mount features