Work around bug in --add handling for version-1 superblocks

In 2.6.17 (and prior), the dev_number is ignored when a device
is added to an active array.  Rather the first free number is used.
So we work around this by making sure we use the first free
number for dev_number.

Description...

1 files changed, 5 insertions, 1 deletions

diff --git a/super1.c b/super1.c
index 6862155..8e6703b 100644
--- a/super1.c
+++ b/super1.c
@@ -779,7 +779,11 @@ static int write_init_super1(struct supertype *st, void *sbv,
 		if (memcmp(sb->set_uuid, refsb->set_uuid, 16)==0) {
 			/* same array, so preserve events and dev_number */
 			sb->events = refsb->events;
-			sb->dev_number = refsb->dev_number;
+			/* bugs in 2.6.17 and earlier mean the dev_number
+			 * chosen in Manage must be preserved
+			 */
+			if (get_linux_version() >= 2006018)
+				sb->dev_number = refsb->dev_number;
 		}
 		free(refsb);
 	}