Commit 54d79085 authored by Jakub Kicinski's avatar Jakub Kicinski
Browse files

tools: ynl: generate code for rt-route and add a sample 



YNL C can now generate code for simple classic netlink families.
Include rt-route in the Makefile for generation and add a sample.

    $ ./tools/net/ynl/samples/rt-route
    oif: wlp0s20f3        gateway: 192.168.1.1
    oif: wlp0s20f3        dst: 192.168.1.0/24
    oif: vpn0             dst: fe80::/64
    oif: wlp0s20f3        dst: fe80::/64
    oif: wlp0s20f3        gateway: fe80::200:5eff:fe00:201

Reviewed-by: default avatarJacob Keller <jacob.e.keller@intel.com>
Reviewed-by: default avatarDonald Hunter <donald.hunter@gmail.com>
Link: https://patch.msgid.link/20250410014658.782120-14-kuba@kernel.org


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 29d34a4d

tools/net/ynl/Makefile.deps

+1 −0
Original line number Diff line number Diff line
@@ -30,4 +30,5 @@ CFLAGS_ovs_datapath:=$(call get_hdr_inc,__LINUX_OPENVSWITCH_H,openvswitch.h) 
CFLAGS_ovs_flow:=$(call get_hdr_inc,__LINUX_OPENVSWITCH_H,openvswitch.h)

CFLAGS_ovs_vport:=$(call get_hdr_inc,__LINUX_OPENVSWITCH_H,openvswitch.h)

CFLAGS_rt-addr:=$(call get_hdr_inc,__LINUX_RTNETLINK_H,rtnetlink.h)

CFLAGS_rt-route:=$(call get_hdr_inc,__LINUX_RTNETLINK_H,rtnetlink.h)

CFLAGS_tcp_metrics:=$(call get_hdr_inc,_LINUX_TCP_METRICS_H,tcp_metrics.h)

tools/net/ynl/generated/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -25,7 +25,7 @@ SPECS_DIR:=../../../../Documentation/netlink/specs 
GENS_PATHS=$(shell grep -nrI --files-without-match \

		'protocol: netlink' \

		$(SPECS_DIR))

GENS=$(patsubst $(SPECS_DIR)/%.yaml,%,${GENS_PATHS}) rt-addr

GENS=$(patsubst $(SPECS_DIR)/%.yaml,%,${GENS_PATHS}) rt-addr rt-route

SRCS=$(patsubst %,%-user.c,${GENS})

HDRS=$(patsubst %,%-user.h,${GENS})

OBJS=$(patsubst %,%-user.o,${GENS})

tools/net/ynl/samples/.gitignore

+1 −0
Original line number Diff line number Diff line
@@ -4,3 +4,4 @@ netdev 
ovs

page-pool

rt-addr

rt-route

tools/net/ynl/samples/rt-route.c

0 → 100644
+80 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

#include <stdio.h>

#include <string.h>



#include <ynl.h>



#include <arpa/inet.h>

#include <net/if.h>



#include "rt-route-user.h"



static void rt_route_print(struct rt_route_getroute_rsp *r)

{

	char ifname[IF_NAMESIZE];

	char route_str[64];

	const char *route;

	const char *name;



	/* Ignore local */

	if (r->_hdr.rtm_table == RT_TABLE_LOCAL)

		return;



	if (r->_present.oif) {

		name = if_indextoname(r->oif, ifname);

		if (name)

			printf("oif: %-16s ", name);

	}



	if (r->_present.dst_len) {

		route = inet_ntop(r->_hdr.rtm_family, r->dst,

				  route_str, sizeof(route_str));

		printf("dst: %s/%d", route, r->_hdr.rtm_dst_len);

	}



	if (r->_present.gateway_len) {

		route = inet_ntop(r->_hdr.rtm_family, r->gateway,

				  route_str, sizeof(route_str));

		printf("gateway: %s ", route);

	}



	printf("\n");

}



int main(int argc, char **argv)

{

	struct rt_route_getroute_req_dump *req;

	struct rt_route_getroute_list *rsp;

	struct ynl_error yerr;

	struct ynl_sock *ys;



	ys = ynl_sock_create(&ynl_rt_route_family, &yerr);

	if (!ys) {

		fprintf(stderr, "YNL: %s\n", yerr.msg);

		return 1;

	}



	req = rt_route_getroute_req_dump_alloc();

	if (!req)

		goto err_destroy;



	rsp = rt_route_getroute_dump(ys, req);

	rt_route_getroute_req_dump_free(req);

	if (!rsp)

		goto err_close;



	if (ynl_dump_empty(rsp))

		fprintf(stderr, "Error: no routeesses reported\n");

	ynl_dump_foreach(rsp, route)

		rt_route_print(route);

	rt_route_getroute_list_free(rsp);



	ynl_sock_destroy(ys);

	return 0;



err_close:

	fprintf(stderr, "YNL: %s\n", ys->err.msg);

err_destroy:

	ynl_sock_destroy(ys);

	return 2;

}