+static struct sk_buff *
+brc_make_request(int op, const char *bridge, const char *port)
+{
+ struct sk_buff *skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!skb)
+ goto error;
+
+ genlmsg_put(skb, 0, 0, &brc_genl_family, 0, op);
+ NLA_PUT_STRING(skb, BRC_GENL_A_DP_NAME, bridge);
+ if (port)
+ NLA_PUT_STRING(skb, BRC_GENL_A_PORT_NAME, port);
+ return skb;
+
+nla_put_failure:
+ kfree_skb(skb);
+error:
+ return NULL;
+}
+
+static int brc_send_simple_command(struct sk_buff *request)
+{
+ struct nlattr *attrs[BRC_GENL_A_MAX + 1];
+ struct sk_buff *reply;
+ int error;
+
+ reply = brc_send_command(request, attrs);
+ if (IS_ERR(reply))
+ return PTR_ERR(reply);
+
+ error = nla_get_u32(attrs[BRC_GENL_A_ERR_CODE]);
+ kfree_skb(reply);
+ return -error;
+}
+