Increment version for clustered bitmaps

Add BITMAP_MAJOR_CLUSTERED as 5, in order to prevent older kernels
to assemble a clustered device.

In order to maximize compatibility, the major version is set to
BITMAP_MAJOR_CLUSTERED *only* if the bitmap is clustered.

Also, added MD_FEATURE_CLUSTERED in order to return error
for older kernels which would assemble MD in case bitmap is
corrupted.

Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/bitmap.h b/bitmap.h
index adbf0b4b..b8fb0714 100644
--- a/bitmap.h
+++ b/bitmap.h
@@ -12,6 +12,7 @@
  */
 #define BITMAP_MAJOR_HI 4
 #define	BITMAP_MAJOR_HOSTENDIAN 3
+#define	BITMAP_MAJOR_CLUSTERED 5
 
 #define BITMAP_MINOR 39