tools: hv: daemon setsockopt should use options macros

HyperV daemon should use macros for option values when calling setsockopt.
Using specific numeric values instead of macros is confusing.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

tools/hv/hv_kvp_daemon.c

@@ -102,6 +102,10 @@ static struct utsname uts_buf;
 #define MAX_FILE_NAME 100
 #define ENTRIES_PER_BLOCK 50
 
+#ifndef SOL_NETLINK
+#define SOL_NETLINK 270
+#endif
+
 struct kvp_record {
 	char key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
 	char value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
@@ -1407,7 +1411,7 @@ netlink_send(int fd, struct cn_msg *msg)
 
 int main(void)
 {
-	int fd, len, sock_opt;
+	int fd, len, nl_group;
 	int error;
 	struct cn_msg *message;
 	struct pollfd pfd;
@@ -1452,8 +1456,8 @@ int main(void)
 		close(fd);
 		exit(EXIT_FAILURE);
 	}
-	sock_opt = CN_KVP_IDX;
-	setsockopt(fd, 270, 1, &sock_opt, sizeof(sock_opt));
+	nl_group = CN_KVP_IDX;
+	setsockopt(fd, SOL_NETLINK, NETLINK_ADD_MEMBERSHIP, &nl_group, sizeof(nl_group));
 	/*
 	 * Register ourselves with the kernel.
 	 */