Allow domain_test to report that no domains were found.

Sometime we will need to know the difference between no domains found
and domains didn't match.
So allow domain_test to return different values and fix up all callers
to maintain current behaviour.

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

1 files changed, 5 insertions, 2 deletions

diff --git a/policy.c b/policy.c
index 38b0072b..afb640f5 100644
--- a/policy.c
+++ b/policy.c
@@ -648,9 +648,12 @@ int domain_test(struct domainlist *dom, struct dev_policy *pol,
 	/* Check that all domains in pol (for metadata) are also in
 	 * dom.  Both lists are sorted.
 	 * If pol has no domains, we don't really know about this device
-	 * so we reject the match.
+	 * so we allow caller to choose:
+	 * -1:  has no domains
+	 *  0:  has domains, not all match
+	 *  1:  has domains, all match
 	 */
-	int found_any = 0;
+	int found_any = -1;
 	struct dev_policy *p;
 
 	pol = pol_find(pol, pol_domain);