Merge branch 'tools-ynl-generate-code-for-the-devlink-family'

Jakub Kicinski says:

====================
tools: ynl: generate code for the devlink family

Another chunk of changes to support more capabilities in the YNL
code gen. Devlink brings in deep nesting and directional messages
(requests and responses have different IDs). We need a healthy
dose of codegen changes to support those (I wasn't planning to
support code gen for "directional" families initially, but
the importance of devlink and ethtool is undeniable).
====================

Link: https://lore.kernel.org/r/20230607202403.1089925-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/tools/net/ynl/samples/devlink.c b/tools/net/ynl/samples/devlink.c
new file mode 100644
index 000000000000..d2611d7ebab4
--- /dev/null
+++ b/tools/net/ynl/samples/devlink.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <string.h>
+
+#include <ynl.h>
+
+#include "devlink-user.h"
+
+int main(int argc, char **argv)
+{
+	struct devlink_get_list *devs;
+	struct ynl_sock *ys;
+
+	ys = ynl_sock_create(&ynl_devlink_family, NULL);
+	if (!ys)
+		return 1;
+
+	devs = devlink_get_dump(ys);
+	if (!devs)
+		goto err_close;
+
+	ynl_dump_foreach(devs, d) {
+		struct devlink_info_get_req *info_req;
+		struct devlink_info_get_rsp *info_rsp;
+
+		printf("%s/%s:\n", d->bus_name, d->dev_name);
+
+		info_req = devlink_info_get_req_alloc();
+		devlink_info_get_req_set_bus_name(info_req, d->bus_name);
+		devlink_info_get_req_set_dev_name(info_req, d->dev_name);
+
+		info_rsp = devlink_info_get(ys, info_req);
+		devlink_info_get_req_free(info_req);
+		if (!info_rsp)
+			goto err_free_devs;
+
+		if (info_rsp->_present.info_driver_name_len)
+			printf("    driver: %s\n", info_rsp->info_driver_name);
+		if (info_rsp->n_info_version_running)
+			printf("    running fw:\n");
+		for (unsigned i = 0; i < info_rsp->n_info_version_running; i++)
+			printf("        %s: %s\n",
+			       info_rsp->info_version_running[i].info_version_name,
+			       info_rsp->info_version_running[i].info_version_value);
+		printf("    ...\n");
+		devlink_info_get_rsp_free(info_rsp);
+	}
+	devlink_get_list_free(devs);
+
+	ynl_sock_destroy(ys);
+
+	return 0;
+
+err_free_devs:
+	devlink_get_list_free(devs);
+err_close:
+	fprintf(stderr, "YNL: %s\n", ys->err.msg);
+	ynl_sock_destroy(ys);
+	return 2;
+}