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, 3 insertions, 2 deletions

diff --git a/mdadm.c b/mdadm.c
index 5d5a1b88..cf3c360f 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -1409,8 +1409,9 @@ int main(int argc, char *argv[])
 		}
 
 		if (s.bitmap_file) {
-			if (strcmp(s.bitmap_file, "internal")==0) {
-				pr_err("'internal' bitmaps not supported with --build\n");
+			if (strcmp(s.bitmap_file, "internal")==0 ||
+			    strcmp(s.bitmap_file, "clustered") == 0) {
+				pr_err("'internal' and 'clustered' bitmaps not supported with --build\n");
 				rv |= 1;
 				break;
 			}