Add subarray field to supertype.

When loading the metadata for a subarray (super_by_fd), we set
->subarray to be the name read from md/metadata_version so that
getinfo_super can return info about the correct array.

With this we can differentiate between a container and
an array within the container by looking at ->subarray[0].

1 files changed, 3 insertions, 0 deletions

diff --git a/super0.c b/super0.c
index 6bb5a7e..9984712 100644
--- a/super0.c
+++ b/super0.c
@@ -783,6 +783,9 @@ static int load_super0(struct supertype *st, int fd, char *devname)
 
 	free_super0(st);
 
+	if (st->subarray[0])
+		return 1;
+
 	if (!get_dev_size(fd, devname, &dsize))
 		return 1;