config: new option to suppress adding bad block lists.

   CREATE bbl=no

in mdadm.conf will cause any devices added to an array
to not have a bad block list.  By default they do for 1.x
metadata.

This is useful if you are suspicious of the bad-block-list
implementation.

Reported-by: Ethan Wilson <ethan.wilson@shiftmail.org>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/super1.c b/super1.c
index 7fba9be0..9834594c 100644
--- a/super1.c
+++ b/super1.c
@@ -1688,6 +1688,10 @@ static int write_init_super1(struct supertype *st)
 			rv = -EINVAL;
 			goto out;
 		}
+		if (conf_get_create_info()->bblist == 0) {
+			sb->bblog_size = 0;
+			sb->bblog_offset = 0;
+		}
 
 		sb->sb_csum = calc_sb_1_csum(sb);
 		rv = store_super1(st, di->fd);