tools: ynl: add sample for devlink

Add a sample to show off how to issue basic devlink requests.
For added testing issue get requests while walking a dump.

$ ./devlink
netdevsim/netdevsim1:
    driver: netdevsim
    running fw:
        fw.mgmt: 10.20.30
    ...
netdevsim/netdevsim2:
    driver: netdevsim
    running fw:
        fw.mgmt: 10.20.30
    ...

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/net/ynl/samples/.gitignore b/tools/net/ynl/samples/.gitignore
index 7b1f517..a24678b 100644 (file)
--- a/tools/net/ynl/samples/.gitignore
+++ b/tools/net/ynl/samples/.gitignore
@@ -1 +1,2 @@
+devlink
 netdev

diff --git a/tools/net/ynl/samples/devlink.c b/tools/net/ynl/samples/devlink.c
new file mode 100644 (file)
index 0000000..d2611d7
--- /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;
+}