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Message-ID: <20250409000400.492371-14-kuba@kernel.org>
Date: Tue, 8 Apr 2025 17:04:00 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
edumazet@...gle.com,
pabeni@...hat.com,
andrew+netdev@...n.ch,
horms@...nel.org,
donald.hunter@...il.com,
jacob.e.keller@...el.com,
yuyanghuang@...gle.com,
sdf@...ichev.me,
gnault@...hat.com,
nicolas.dichtel@...nd.com,
petrm@...dia.com,
Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next 13/13] 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
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
tools/net/ynl/Makefile.deps | 1 +
tools/net/ynl/generated/Makefile | 2 +-
tools/net/ynl/samples/rt-route.c | 80 ++++++++++++++++++++++++++++++++
tools/net/ynl/samples/.gitignore | 1 +
4 files changed, 83 insertions(+), 1 deletion(-)
create mode 100644 tools/net/ynl/samples/rt-route.c
diff --git a/tools/net/ynl/Makefile.deps b/tools/net/ynl/Makefile.deps
index e55d94211df6..385783489f84 100644
--- a/tools/net/ynl/Makefile.deps
+++ b/tools/net/ynl/Makefile.deps
@@ -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)
diff --git a/tools/net/ynl/generated/Makefile b/tools/net/ynl/generated/Makefile
index 67ce3b8988ef..6603ad8d4ce1 100644
--- a/tools/net/ynl/generated/Makefile
+++ b/tools/net/ynl/generated/Makefile
@@ -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})
diff --git a/tools/net/ynl/samples/rt-route.c b/tools/net/ynl/samples/rt-route.c
new file mode 100644
index 000000000000..9d9c868f8873
--- /dev/null
+++ b/tools/net/ynl/samples/rt-route.c
@@ -0,0 +1,80 @@
+// 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;
+}
diff --git a/tools/net/ynl/samples/.gitignore b/tools/net/ynl/samples/.gitignore
index 2bc8721d6144..7f9781cf532f 100644
--- a/tools/net/ynl/samples/.gitignore
+++ b/tools/net/ynl/samples/.gitignore
@@ -4,3 +4,4 @@ netdev
ovs
page-pool
rt-addr
+rt-route
--
2.49.0
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