Teach xfs_getbmapx how to report shared extents and CoW fork contents,
then modify the FIEMAP formatters to set the appropriate flags. A
previous version of this patch only modified the fiemap formatter,
which is insufficient.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
libxfs/xfs_fs.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libxfs/xfs_fs.h b/libxfs/xfs_fs.h
index f291a53..bb70066 100644
--- a/libxfs/xfs_fs.h
+++ b/libxfs/xfs_fs.h
@@ -105,14 +105,16 @@ struct getbmapx {
#define BMV_IF_PREALLOC 0x4 /* rtn status BMV_OF_PREALLOC if req */
#define BMV_IF_DELALLOC 0x8 /* rtn status BMV_OF_DELALLOC if req */
#define BMV_IF_NO_HOLES 0x10 /* Do not return holes */
+#define BMV_IF_COWFORK 0x20 /* return CoW fork rather than data */
#define BMV_IF_VALID \
(BMV_IF_ATTRFORK|BMV_IF_NO_DMAPI_READ|BMV_IF_PREALLOC| \
- BMV_IF_DELALLOC|BMV_IF_NO_HOLES)
+ BMV_IF_DELALLOC|BMV_IF_NO_HOLES|BMV_IF_COWFORK)
/* bmv_oflags values - returned for each non-header segment */
#define BMV_OF_PREALLOC 0x1 /* segment = unwritten pre-allocation */
#define BMV_OF_DELALLOC 0x2 /* segment = delayed allocation */
#define BMV_OF_LAST 0x4 /* segment is the last in the file */
+#define BMV_OF_SHARED 0x8 /* segment shared with another file */
/*
* Structure for XFS_IOC_FSSETDM.
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