Allow a uuid of all f's to always match

[thirdparty/mdadm.git] / util.c

diff --git a/util.c b/util.c
index 4c0494236dfd6a97bf0d838d083346cf95c467ae..f6e4dd0eb19fed3a9c2875d7a1531cddae77c85d 100644 (file)
--- a/util.c
+++ b/util.c
@@ -222,8 +222,13 @@ int enough(int level, int raid_disks, int layout, int clean,
        }
 }
 
+const int uuid_match_any[4] = { ~0, ~0, ~0, ~0 };
 int same_uuid(int a[4], int b[4], int swapuuid)
 {
+       if (memcmp(a, uuid_match_any, sizeof(int[4])) == 0 ||
+           memcmp(b, uuid_match_any, sizeof(int[4])) == 0)
+               return 1;
+
        if (swapuuid) {
                /* parse uuids are hostendian.
                 * uuid's from some superblocks are big-ending