Incremental: honor an 'enough' flag from external handlers

This is needed for imsm where:
1/ we want to report raid_disks as zero to allow mdadm -As to
   incorporate all spares
2/ we can't determine stale disks by looking at the event counts.
3/ we can't see per-subarray expectations with the info returned from
   the container level ->getinfo_super()

Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/mdadm.h b/mdadm.h
index d9d17b0..a0797e8 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -205,7 +205,9 @@ struct mdinfo {
 	int container_member; /* for assembling external-metatdata arrays
 			       * This is to be used internally by metadata
 			       * handler only */
-
+	int container_enough; /* flag external handlers can set to
+			       * indicate that subarrays have not enough (-1),
+			       * enough to start (0), or all expected disks (1) */
 	char 		sys_name[20];
 	struct mdinfo *devs;
 	struct mdinfo *next;