netfilter: xtables: change matches to return error code

The following semantic patch does part of the transformation:
// <smpl>
@ rule1 @
struct xt_match ops;
identifier check;
@@
 ops.checkentry = check;

@@
identifier rule1.check;
@@
 check(...) { <...
-return true;
+return 0;
 ...> }

@@
identifier rule1.check;
@@
 check(...) { <...
-return false;
+return -EINVAL;
 ...> }
// </smpl>

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

1 files changed, 3 insertions, 3 deletions

diff --git a/net/netfilter/xt_cluster.c b/net/netfilter/xt_cluster.c
index 1f2c35ef1427..30cb7762fc41 100644
--- a/net/netfilter/xt_cluster.c
+++ b/net/netfilter/xt_cluster.c
@@ -140,14 +140,14 @@ static int xt_cluster_mt_checkentry(const struct xt_mtchk_param *par)
 		pr_info("you have exceeded the maximum "
 			"number of cluster nodes (%u > %u)\n",
 			info->total_nodes, XT_CLUSTER_NODES_MAX);
-		return false;
+		return -EINVAL;
 	}
 	if (info->node_mask >= (1ULL << info->total_nodes)) {
 		pr_info("this node mask cannot be "
 			"higher than the total number of nodes\n");
-		return false;
+		return -EINVAL;
 	}
-	return true;
+	return 0;
 }
 
 static struct xt_match xt_cluster_match __read_mostly = {