FIEMAP_EXTENT_LAST		0x00000001
FIEMAP_EXTENT_UNKNOWN		0x00000002
FIEMAP_EXTENT_DELALLOC		0x00000004
FIEMAP_EXTENT_ENCODED		0x00000008
FIEMAP_EXTENT_DATA_ENCRYPTED	0x00000080
FIEMAP_EXTENT_NOT_ALIGNED	0x00000100
FIEMAP_EXTENT_DATA_INLINE	0x00000200
FIEMAP_EXTENT_DATA_TAIL		0x00000400
FIEMAP_EXTENT_UNWRITTEN		0x00000800
FIEMAP_EXTENT_MERGED		0x00001000
FIEMAP_EXTENT_SHARED		0x00002000