1 files changed, 122 insertions, 0 deletions
diff --git a/tools/net/ynl/samples/netdev.c b/tools/net/ynl/samples/netdev.c
new file mode 100644
index 000000000000..591b90e21890
--- /dev/null
+++ b/tools/net/ynl/samples/netdev.c
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <stdio.h>
+#include <string.h>
+
+#include <ynl.h>
+
+#include <net/if.h>
+
+#include "netdev-user.h"
+
+/* netdev genetlink family code sample
+ * This sample shows off basics of the netdev family but also notification
+ * handling, hence the somewhat odd UI. We subscribe to notifications first
+ * then wait for ifc selection, so the socket may already accumulate
+ * notifications as we wait. This allows us to test that YNL can handle
+ * requests and notifications getting interleaved.
+ */
+
+static void netdev_print_device(struct netdev_dev_get_rsp *d, unsigned int op)
+{
+	char ifname[IF_NAMESIZE];
+	const char *name;
+
+	if (!d->_present.ifindex)
+		return;
+
+	name = if_indextoname(d->ifindex, ifname);
+	if (name)
+		printf("%8s", name);
+	printf("[%d]\t", d->ifindex);
+
+	if (!d->_present.xdp_features)
+		return;
+
+	printf("xdp-features (%llx):", d->xdp_features);
+	for (int i = 0; d->xdp_features >= 1U << i; i++) {
+		if (d->xdp_features & (1U << i))
+			printf(" %s", netdev_xdp_act_str(1 << i));
+	}
+
+	printf(" xdp-rx-metadata-features (%llx):", d->xdp_rx_metadata_features);
+	for (int i = 0; d->xdp_rx_metadata_features >= 1U << i; i++) {
+		if (d->xdp_rx_metadata_features & (1U << i))
+			printf(" %s", netdev_xdp_rx_metadata_str(1 << i));
+	}
+
+	printf(" xsk-features (%llx):", d->xsk_features);
+	for (int i = 0; d->xsk_features >= 1U << i; i++) {
+		if (d->xsk_features & (1U << i))
+			printf(" %s", netdev_xsk_flags_str(1 << i));
+	}
+
+	printf(" xdp-zc-max-segs=%u", d->xdp_zc_max_segs);
+
+	name = netdev_op_str(op);
+	if (name)
+		printf(" (ntf: %s)", name);
+	printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+	struct netdev_dev_get_list *devs;
+	struct ynl_ntf_base_type *ntf;
+	struct ynl_error yerr;
+	struct ynl_sock *ys;
+	int ifindex = 0;
+
+	if (argc > 1)
+		ifindex = strtol(argv[1], NULL, 0);
+
+	ys = ynl_sock_create(&ynl_netdev_family, &yerr);
+	if (!ys) {
+		fprintf(stderr, "YNL: %s\n", yerr.msg);
+		return 1;
+	}
+
+	if (ynl_subscribe(ys, "mgmt"))
+		goto err_close;
+
+	printf("Select ifc ($ifindex; or 0 = dump; or -2 ntf check): ");
+	scanf("%d", &ifindex);
+
+	if (ifindex > 0) {
+		struct netdev_dev_get_req *req;
+		struct netdev_dev_get_rsp *d;
+
+		req = netdev_dev_get_req_alloc();
+		netdev_dev_get_req_set_ifindex(req, ifindex);
+
+		d = netdev_dev_get(ys, req);
+		netdev_dev_get_req_free(req);
+		if (!d)
+			goto err_close;
+
+		netdev_print_device(d, 0);
+		netdev_dev_get_rsp_free(d);
+	} else if (!ifindex) {
+		devs = netdev_dev_get_dump(ys);
+		if (!devs)
+			goto err_close;
+
+		ynl_dump_foreach(devs, d)
+			netdev_print_device(d, 0);
+		netdev_dev_get_list_free(devs);
+	} else if (ifindex == -2) {
+		ynl_ntf_check(ys);
+	}
+	while ((ntf = ynl_ntf_dequeue(ys))) {
+		netdev_print_device((struct netdev_dev_get_rsp *)&ntf->data,
+				    ntf->cmd);
+		ynl_ntf_free(ntf);
+	}
+
+	ynl_sock_destroy(ys);
+	return 0;
+
+err_close:
+	fprintf(stderr, "YNL: %s\n", ys->err.msg);
+	ynl_sock_destroy(ys);
+	return 2;
+}