[PATCH 44/58] xfs: add reflink feature flag to geometry

Darrick J. Wong
2015-10-07T05:00:04Z

Report the reflink feature in the XFS geometry so that xfs_info and
friends know the filesystem has this feature.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/libxfs/xfs_fs.h | 3 ++-
fs/xfs/xfs_fsops.c | 4 +++-
2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index 9fbdb86..b6ee5d8 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -240,7 +240,8 @@ 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 */
+#define XFS_FSOP_GEOM_FLAGS_RMAPBT 0x80000 /* reverse mapping btree */
+#define XFS_FSOP_GEOM_FLAGS_REFLINK 0x100000 /* files can share blocks */

/*
* Minimum and maximum sizes need for growth checks.
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 7c37c22..920db9d 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -106,7 +106,9 @@ xfs_fs_geometry(
(xfs_sb_version_hassparseinodes(&mp->m_sb) ?
XFS_FSOP_GEOM_FLAGS_SPINODES : 0) |
(xfs_sb_version_hasrmapbt(&mp->m_sb) ?
- XFS_FSOP_GEOM_FLAGS_RMAPBT : 0);
+ XFS_FSOP_GEOM_FLAGS_RMAPBT : 0) |
+ (xfs_sb_version_hasreflink(&mp->m_sb) ?
+ XFS_FSOP_GEOM_FLAGS_REFLINK : 0);
geo->logsectsize = xfs_sb_version_hassector(&mp->m_sb) ?
mp->m_sb.sb_logsectsize : BBSIZE;
geo->rtsectsize = mp->m_sb.sb_blocksize;