confd: if: Ensure that the required modules are loaded

src/confd/src/ietf-interfaces.c

@@ -1,8 +1,28 @@
 /* SPDX-License-Identifier: BSD-3-Clause */
 
 #include "core.h"
+#include "sr_ext.h"
+
+const struct srx_module_requirement ietf_if_reqs[] = {
+	{ .dir = YANG_PATH_, .name = "ietf-interfaces", .rev = "2018-02-20" },
+	{ .dir = YANG_PATH_, .name = "iana-if-type", .rev = "2023-01-26" },
+	{ .dir = YANG_PATH_, .name = "ietf-ip", .rev = "2018-02-22" },
+
+	{ NULL }
+};
 
 int ietf_interfaces_init(struct confd *confd)
 {
+	int err;
+
+	err = srx_require_modules(confd->conn, ietf_if_reqs);
+	if (err)
+		goto err;
+
 	return SR_ERR_OK;
+err:
+	ERROR("init failed: %s", sr_strerror(err));
+	sr_unsubscribe(confd->sub);
+
+	return err;
 }