xfs: add rmap btree geometry feature flag

Originally-From: Dave Chinner <dchinner@redhat.com>

So xfs_info and other userspace utilities know the filesystem is
using this feature.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

2 files changed, 4 insertions, 1 deletions

diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index f5ec9c5ccae6..79455058b752 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -206,6 +206,7 @@ typedef struct xfs_fsop_resblks {
 #define XFS_FSOP_GEOM_FLAGS_FTYPE       0x10000 /* inode directory types */
 #define XFS_FSOP_GEOM_FLAGS_FINOBT      0x20000 /* free inode btree */
 #define XFS_FSOP_GEOM_FLAGS_SPINODES    0x40000 /* sparse inode chunks  */
+#define XFS_FSOP_GEOM_FLAGS_RMAPBT      0x80000 /* Reverse mapping btree */
 
 /*
  * Minimum and maximum sizes need for growth checks.
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 83304d54e6d4..0f96847b90e1 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -106,7 +106,9 @@ xfs_fs_geometry(
                         (xfs_sb_version_hasfinobt(&mp->m_sb) ?
                                 XFS_FSOP_GEOM_FLAGS_FINOBT : 0) |
                         (xfs_sb_version_hassparseinodes(&mp->m_sb) ?
-                                XFS_FSOP_GEOM_FLAGS_SPINODES : 0);
+                                XFS_FSOP_GEOM_FLAGS_SPINODES : 0) |
+                        (xfs_sb_version_hasrmapbt(&mp->m_sb) ?
+                                XFS_FSOP_GEOM_FLAGS_RMAPBT : 0);
                 geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
                                 mp->m_sb.sb_logsectsize : BBSIZE;
                 geo->rtsectsize = mp->m_sb.sb_blocksize;