From ee0202e2e731d074639461b3db2296bf44d847ce Mon Sep 17 00:00:00 2001 From: Jakub Kicinski Date: Mon, 5 Jun 2023 12:01:08 -0700 Subject: tools: ynl: add sample for netdev Add a sample application using the C library. My main goal is to make writing selftests easier but until I have some of those ready I think it's useful to show off the functionality and let people poke and tinker. Sample outputs - dump: $ ./netdev Select ifc ($ifindex; or 0 = dump; or -2 ntf check): 0 lo[1] 0: enp1s0[2] 23: basic redirect rx-sg Notifications (watching veth pair getting added and deleted): $ ./netdev Select ifc ($ifindex; or 0 = dump; or -2 ntf check): -2 [53] 0: (ntf: dev-add-ntf) [54] 0: (ntf: dev-add-ntf) [54] 23: basic redirect rx-sg (ntf: dev-change-ntf) [53] 23: basic redirect rx-sg (ntf: dev-change-ntf) [53] 23: basic redirect rx-sg (ntf: dev-del-ntf) [54] 23: basic redirect rx-sg (ntf: dev-del-ntf) Reviewed-by: Willem de Bruijn Signed-off-by: Jakub Kicinski --- tools/net/ynl/samples/.gitignore | 1 + tools/net/ynl/samples/Makefile | 28 ++++++++++ tools/net/ynl/samples/netdev.c | 108 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 137 insertions(+) create mode 100644 tools/net/ynl/samples/.gitignore create mode 100644 tools/net/ynl/samples/Makefile create mode 100644 tools/net/ynl/samples/netdev.c (limited to 'tools') diff --git a/tools/net/ynl/samples/.gitignore b/tools/net/ynl/samples/.gitignore new file mode 100644 index 000000000000..7b1f5179cb54 --- /dev/null +++ b/tools/net/ynl/samples/.gitignore @@ -0,0 +1 @@ +netdev diff --git a/tools/net/ynl/samples/Makefile b/tools/net/ynl/samples/Makefile new file mode 100644 index 000000000000..714316cad45f --- /dev/null +++ b/tools/net/ynl/samples/Makefile @@ -0,0 +1,28 @@ +# SPDX-License-Identifier: GPL-2.0 + +CC=gcc +CFLAGS=-std=gnu11 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow \ + -I../lib/ -I../generated/ +ifeq ("$(DEBUG)","1") + CFLAGS += -g -fsanitize=address -fsanitize=leak -static-libasan +endif + +LDLIBS=-lmnl ../lib/ynl.a ../generated/protos.a + +SRCS=$(wildcard *.c) +BINS=$(patsubst %.c,%,${SRCS}) + +include $(wildcard *.d) + +all: $(BINS) + +$(BINS): ../lib/ynl.a ../generated/protos.a + +clean: + rm -f *.o *.d *~ + +hardclean: clean + rm -f $(BINS) + +.PHONY: all clean +.DEFAULT_GOAL=all diff --git a/tools/net/ynl/samples/netdev.c b/tools/net/ynl/samples/netdev.c new file mode 100644 index 000000000000..d31268aa47c5 --- /dev/null +++ b/tools/net/ynl/samples/netdev.c @@ -0,0 +1,108 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include + +#include + +#include + +#include "netdev-user.h" + +/* netdev genetlink family code sample + * This sample shows off basics of the netdev family but also notification + * handling, hence the somewhat odd UI. We subscribe to notifications first + * then wait for ifc selection, so the socket may already accumulate + * notifications as we wait. This allows us to test that YNL can handle + * requests and notifications getting interleaved. + */ + +static void netdev_print_device(struct netdev_dev_get_rsp *d, unsigned int op) +{ + char ifname[IF_NAMESIZE]; + const char *name; + + if (!d->_present.ifindex) + return; + + name = if_indextoname(d->ifindex, ifname); + if (name) + printf("%8s", name); + printf("[%d]\t", d->ifindex); + + if (!d->_present.xdp_features) + return; + + printf("%llx:", d->xdp_features); + for (int i = 0; d->xdp_features > 1U << i; i++) { + if (d->xdp_features & (1U << i)) + printf(" %s", netdev_xdp_act_str(1 << i)); + } + + name = netdev_op_str(op); + if (name) + printf(" (ntf: %s)", name); + printf("\n"); +} + +int main(int argc, char **argv) +{ + struct netdev_dev_get_list *devs; + struct ynl_ntf_base_type *ntf; + struct ynl_error yerr; + struct ynl_sock *ys; + int ifindex = 0; + + if (argc > 1) + ifindex = strtol(argv[1], NULL, 0); + + ys = ynl_sock_create(&ynl_netdev_family, &yerr); + if (!ys) { + fprintf(stderr, "YNL: %s\n", yerr.msg); + return 1; + } + + if (ynl_subscribe(ys, "mgmt")) + goto err_close; + + printf("Select ifc ($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; +} -- cgit v1.2.3