Diffstat (limited to 'include/linux/raid/md_u.h')
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/raid/md_u.h b/include/linux/raid/md_u.h
index 2f824aa889f..fb1abb3367e 100644
@@ -15,6 +15,24 @@
+ * Different major versions are not compatible.
+ * Different minor versions are only downward compatible.
+ * Different patchlevel versions are downward and upward compatible.
+#define MD_MAJOR_VERSION 0
+#define MD_MINOR_VERSION 90
+ * MD_PATCHLEVEL_VERSION indicates kernel functionality.
+ * >=1 means different superblock formats are selectable using SET_ARRAY_INFO
+ * and major_version/minor_version accordingly
+ * >=2 means that Internal bitmaps are supported by setting MD_SB_BITMAP_PRESENT
+ * in the super status byte
+ * >=3 means that bitmap superblock version 4 is supported, which uses
+ * little-ending representation rather than host-endian
+#define MD_PATCHLEVEL_VERSION 3
/* ioctls */
/* status */