Introduce new open_mddev which just does an open.

Some cases we aren't interested in creating the mddev, just opening
it.  Make those more explicit.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/mdadm.h b/mdadm.h
index 8527bbb..7b7e233 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -802,6 +802,7 @@ extern char *get_md_name(int dev);
 extern char DefaultConfFile[];
 
 extern int create_mddev(char *dev, int autof);
+extern int open_mddev(char *dev, int report_errors);
 extern int create_mddev_devnum(char *devname, int devnum, char *name,
 			     char *chosen_name, int parts);
 extern int open_container(int fd);