Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 699 insertions, 0 deletions

diff --git a/samples/bpf/xdp_router_ipv4_user.c b/samples/bpf/xdp_router_ipv4_user.c
new file mode 100644
index 000000000..683913bbf
--- /dev/null
+++ b/samples/bpf/xdp_router_ipv4_user.c
@@ -0,0 +1,699 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (C) 2017 Cavium, Inc.
+ */
+#include <linux/bpf.h>
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+#include <assert.h>
+#include <errno.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <bpf/bpf.h>
+#include <arpa/inet.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <net/if.h>
+#include <netdb.h>
+#include <sys/ioctl.h>
+#include <sys/syscall.h>
+#include "bpf_util.h"
+#include <bpf/libbpf.h>
+#include <libgen.h>
+#include <getopt.h>
+#include <pthread.h>
+#include "xdp_sample_user.h"
+#include "xdp_router_ipv4.skel.h"
+
+static const char *__doc__ =
+"XDP IPv4 router implementation\n"
+"Usage: xdp_router_ipv4 <IFNAME-0> ... <IFNAME-N>\n";
+
+static char buf[8192];
+static int lpm_map_fd;
+static int arp_table_map_fd;
+static int exact_match_map_fd;
+static int tx_port_map_fd;
+
+static bool routes_thread_exit;
+static int interval = 5;
+
+static int mask = SAMPLE_RX_CNT | SAMPLE_REDIRECT_ERR_MAP_CNT |
+		  SAMPLE_DEVMAP_XMIT_CNT_MULTI | SAMPLE_EXCEPTION_CNT;
+
+DEFINE_SAMPLE_INIT(xdp_router_ipv4);
+
+static const struct option long_options[] = {
+	{ "help", no_argument, NULL, 'h' },
+	{ "skb-mode", no_argument, NULL, 'S' },
+	{ "force", no_argument, NULL, 'F' },
+	{ "interval", required_argument, NULL, 'i' },
+	{ "verbose", no_argument, NULL, 'v' },
+	{ "stats", no_argument, NULL, 's' },
+	{}
+};
+
+static int get_route_table(int rtm_family);
+
+static int recv_msg(struct sockaddr_nl sock_addr, int sock)
+{
+	struct nlmsghdr *nh;
+	int len, nll = 0;
+	char *buf_ptr;
+
+	buf_ptr = buf;
+	while (1) {
+		len = recv(sock, buf_ptr, sizeof(buf) - nll, 0);
+		if (len < 0)
+			return len;
+
+		nh = (struct nlmsghdr *)buf_ptr;
+
+		if (nh->nlmsg_type == NLMSG_DONE)
+			break;
+		buf_ptr += len;
+		nll += len;
+		if ((sock_addr.nl_groups & RTMGRP_NEIGH) == RTMGRP_NEIGH)
+			break;
+
+		if ((sock_addr.nl_groups & RTMGRP_IPV4_ROUTE) == RTMGRP_IPV4_ROUTE)
+			break;
+	}
+	return nll;
+}
+
+/* Function to parse the route entry returned by netlink
+ * Updates the route entry related map entries
+ */
+static void read_route(struct nlmsghdr *nh, int nll)
+{
+	char dsts[24], gws[24], ifs[16], dsts_len[24], metrics[24];
+	struct bpf_lpm_trie_key *prefix_key;
+	struct rtattr *rt_attr;
+	struct rtmsg *rt_msg;
+	int rtm_family;
+	int rtl;
+	int i;
+	struct route_table {
+		int  dst_len, iface, metric;
+		__be32 dst, gw;
+		__be64 mac;
+	} route;
+	struct arp_table {
+		__be64 mac;
+		__be32 dst;
+	};
+
+	struct direct_map {
+		struct arp_table arp;
+		int ifindex;
+		__be64 mac;
+	} direct_entry;
+
+	memset(&route, 0, sizeof(route));
+	for (; NLMSG_OK(nh, nll); nh = NLMSG_NEXT(nh, nll)) {
+		rt_msg = (struct rtmsg *)NLMSG_DATA(nh);
+		rtm_family = rt_msg->rtm_family;
+		if (rtm_family == AF_INET)
+			if (rt_msg->rtm_table != RT_TABLE_MAIN)
+				continue;
+		rt_attr = (struct rtattr *)RTM_RTA(rt_msg);
+		rtl = RTM_PAYLOAD(nh);
+
+		for (; RTA_OK(rt_attr, rtl); rt_attr = RTA_NEXT(rt_attr, rtl)) {
+			switch (rt_attr->rta_type) {
+			case NDA_DST:
+				sprintf(dsts, "%u",
+					(*((__be32 *)RTA_DATA(rt_attr))));
+				break;
+			case RTA_GATEWAY:
+				sprintf(gws, "%u",
+					*((__be32 *)RTA_DATA(rt_attr)));
+				break;
+			case RTA_OIF:
+				sprintf(ifs, "%u",
+					*((int *)RTA_DATA(rt_attr)));
+				break;
+			case RTA_METRICS:
+				sprintf(metrics, "%u",
+					*((int *)RTA_DATA(rt_attr)));
+			default:
+				break;
+			}
+		}
+		sprintf(dsts_len, "%d", rt_msg->rtm_dst_len);
+		route.dst = atoi(dsts);
+		route.dst_len = atoi(dsts_len);
+		route.gw = atoi(gws);
+		route.iface = atoi(ifs);
+		route.metric = atoi(metrics);
+		assert(get_mac_addr(route.iface, &route.mac) == 0);
+		assert(bpf_map_update_elem(tx_port_map_fd,
+					   &route.iface, &route.iface, 0) == 0);
+		if (rtm_family == AF_INET) {
+			struct trie_value {
+				__u8 prefix[4];
+				__be64 value;
+				int ifindex;
+				int metric;
+				__be32 gw;
+			} *prefix_value;
+
+			prefix_key = alloca(sizeof(*prefix_key) + 3);
+			prefix_value = alloca(sizeof(*prefix_value));
+
+			prefix_key->prefixlen = 32;
+			prefix_key->prefixlen = route.dst_len;
+			direct_entry.mac = route.mac & 0xffffffffffff;
+			direct_entry.ifindex = route.iface;
+			direct_entry.arp.mac = 0;
+			direct_entry.arp.dst = 0;
+			if (route.dst_len == 32) {
+				if (nh->nlmsg_type == RTM_DELROUTE) {
+					assert(bpf_map_delete_elem(exact_match_map_fd,
+								   &route.dst) == 0);
+				} else {
+					if (bpf_map_lookup_elem(arp_table_map_fd,
+								&route.dst,
+								&direct_entry.arp.mac) == 0)
+						direct_entry.arp.dst = route.dst;
+					assert(bpf_map_update_elem(exact_match_map_fd,
+								   &route.dst,
+								   &direct_entry, 0) == 0);
+				}
+			}
+			for (i = 0; i < 4; i++)
+				prefix_key->data[i] = (route.dst >> i * 8) & 0xff;
+
+			if (bpf_map_lookup_elem(lpm_map_fd, prefix_key,
+						prefix_value) < 0) {
+				for (i = 0; i < 4; i++)
+					prefix_value->prefix[i] = prefix_key->data[i];
+				prefix_value->value = route.mac & 0xffffffffffff;
+				prefix_value->ifindex = route.iface;
+				prefix_value->gw = route.gw;
+				prefix_value->metric = route.metric;
+
+				assert(bpf_map_update_elem(lpm_map_fd,
+							   prefix_key,
+							   prefix_value, 0
+							   ) == 0);
+			} else {
+				if (nh->nlmsg_type == RTM_DELROUTE) {
+					assert(bpf_map_delete_elem(lpm_map_fd,
+								   prefix_key
+								   ) == 0);
+					/* Rereading the route table to check if
+					 * there is an entry with the same
+					 * prefix but a different metric as the
+					 * deleted entry.
+					 */
+					get_route_table(AF_INET);
+				} else if (prefix_key->data[0] ==
+					   prefix_value->prefix[0] &&
+					   prefix_key->data[1] ==
+					   prefix_value->prefix[1] &&
+					   prefix_key->data[2] ==
+					   prefix_value->prefix[2] &&
+					   prefix_key->data[3] ==
+					   prefix_value->prefix[3] &&
+					   route.metric >= prefix_value->metric) {
+					continue;
+				} else {
+					for (i = 0; i < 4; i++)
+						prefix_value->prefix[i] =
+							prefix_key->data[i];
+					prefix_value->value =
+						route.mac & 0xffffffffffff;
+					prefix_value->ifindex = route.iface;
+					prefix_value->gw = route.gw;
+					prefix_value->metric = route.metric;
+					assert(bpf_map_update_elem(lpm_map_fd,
+								   prefix_key,
+								   prefix_value,
+								   0) == 0);
+				}
+			}
+		}
+		memset(&route, 0, sizeof(route));
+		memset(dsts, 0, sizeof(dsts));
+		memset(dsts_len, 0, sizeof(dsts_len));
+		memset(gws, 0, sizeof(gws));
+		memset(ifs, 0, sizeof(ifs));
+		memset(&route, 0, sizeof(route));
+	}
+}
+
+/* Function to read the existing route table  when the process is launched*/
+static int get_route_table(int rtm_family)
+{
+	struct sockaddr_nl sa;
+	struct nlmsghdr *nh;
+	int sock, seq = 0;
+	struct msghdr msg;
+	struct iovec iov;
+	int ret = 0;
+	int nll;
+
+	struct {
+		struct nlmsghdr nl;
+		struct rtmsg rt;
+		char buf[8192];
+	} req;
+
+	sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (sock < 0) {
+		fprintf(stderr, "open netlink socket: %s\n", strerror(errno));
+		return -errno;
+	}
+	memset(&sa, 0, sizeof(sa));
+	sa.nl_family = AF_NETLINK;
+	if (bind(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
+		fprintf(stderr, "bind netlink socket: %s\n", strerror(errno));
+		ret = -errno;
+		goto cleanup;
+	}
+	memset(&req, 0, sizeof(req));
+	req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
+	req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
+	req.nl.nlmsg_type = RTM_GETROUTE;
+
+	req.rt.rtm_family = rtm_family;
+	req.rt.rtm_table = RT_TABLE_MAIN;
+	req.nl.nlmsg_pid = 0;
+	req.nl.nlmsg_seq = ++seq;
+	memset(&msg, 0, sizeof(msg));
+	iov.iov_base = (void *)&req.nl;
+	iov.iov_len = req.nl.nlmsg_len;
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	ret = sendmsg(sock, &msg, 0);
+	if (ret < 0) {
+		fprintf(stderr, "send to netlink: %s\n", strerror(errno));
+		ret = -errno;
+		goto cleanup;
+	}
+	memset(buf, 0, sizeof(buf));
+	nll = recv_msg(sa, sock);
+	if (nll < 0) {
+		fprintf(stderr, "recv from netlink: %s\n", strerror(nll));
+		ret = nll;
+		goto cleanup;
+	}
+	nh = (struct nlmsghdr *)buf;
+	read_route(nh, nll);
+cleanup:
+	close(sock);
+	return ret;
+}
+
+/* Function to parse the arp entry returned by netlink
+ * Updates the arp entry related map entries
+ */
+static void read_arp(struct nlmsghdr *nh, int nll)
+{
+	struct rtattr *rt_attr;
+	char dsts[24], mac[24];
+	struct ndmsg *rt_msg;
+	int rtl, ndm_family;
+
+	struct arp_table {
+		__be64 mac;
+		__be32 dst;
+	} arp_entry;
+	struct direct_map {
+		struct arp_table arp;
+		int ifindex;
+		__be64 mac;
+	} direct_entry;
+
+	for (; NLMSG_OK(nh, nll); nh = NLMSG_NEXT(nh, nll)) {
+		rt_msg = (struct ndmsg *)NLMSG_DATA(nh);
+		rt_attr = (struct rtattr *)RTM_RTA(rt_msg);
+		ndm_family = rt_msg->ndm_family;
+		rtl = RTM_PAYLOAD(nh);
+		for (; RTA_OK(rt_attr, rtl); rt_attr = RTA_NEXT(rt_attr, rtl)) {
+			switch (rt_attr->rta_type) {
+			case NDA_DST:
+				sprintf(dsts, "%u",
+					*((__be32 *)RTA_DATA(rt_attr)));
+				break;
+			case NDA_LLADDR:
+				sprintf(mac, "%lld",
+					*((__be64 *)RTA_DATA(rt_attr)));
+				break;
+			default:
+				break;
+			}
+		}
+		arp_entry.dst = atoi(dsts);
+		arp_entry.mac = atol(mac);
+
+		if (ndm_family == AF_INET) {
+			if (bpf_map_lookup_elem(exact_match_map_fd,
+						&arp_entry.dst,
+						&direct_entry) == 0) {
+				if (nh->nlmsg_type == RTM_DELNEIGH) {
+					direct_entry.arp.dst = 0;
+					direct_entry.arp.mac = 0;
+				} else if (nh->nlmsg_type == RTM_NEWNEIGH) {
+					direct_entry.arp.dst = arp_entry.dst;
+					direct_entry.arp.mac = arp_entry.mac;
+				}
+				assert(bpf_map_update_elem(exact_match_map_fd,
+							   &arp_entry.dst,
+							   &direct_entry, 0
+							   ) == 0);
+				memset(&direct_entry, 0, sizeof(direct_entry));
+			}
+			if (nh->nlmsg_type == RTM_DELNEIGH) {
+				assert(bpf_map_delete_elem(arp_table_map_fd,
+							   &arp_entry.dst) == 0);
+			} else if (nh->nlmsg_type == RTM_NEWNEIGH) {
+				assert(bpf_map_update_elem(arp_table_map_fd,
+							   &arp_entry.dst,
+							   &arp_entry.mac, 0
+							   ) == 0);
+			}
+		}
+		memset(&arp_entry, 0, sizeof(arp_entry));
+		memset(dsts, 0, sizeof(dsts));
+	}
+}
+
+/* Function to read the existing arp table  when the process is launched*/
+static int get_arp_table(int rtm_family)
+{
+	struct sockaddr_nl sa;
+	struct nlmsghdr *nh;
+	int sock, seq = 0;
+	struct msghdr msg;
+	struct iovec iov;
+	int ret = 0;
+	int nll;
+	struct {
+		struct nlmsghdr nl;
+		struct ndmsg rt;
+		char buf[8192];
+	} req;
+
+	sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (sock < 0) {
+		fprintf(stderr, "open netlink socket: %s\n", strerror(errno));
+		return -errno;
+	}
+	memset(&sa, 0, sizeof(sa));
+	sa.nl_family = AF_NETLINK;
+	if (bind(sock, (struct sockaddr *)&sa, sizeof(sa)) < 0) {
+		fprintf(stderr, "bind netlink socket: %s\n", strerror(errno));
+		ret = -errno;
+		goto cleanup;
+	}
+	memset(&req, 0, sizeof(req));
+	req.nl.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
+	req.nl.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
+	req.nl.nlmsg_type = RTM_GETNEIGH;
+	req.rt.ndm_state = NUD_REACHABLE;
+	req.rt.ndm_family = rtm_family;
+	req.nl.nlmsg_pid = 0;
+	req.nl.nlmsg_seq = ++seq;
+	memset(&msg, 0, sizeof(msg));
+	iov.iov_base = (void *)&req.nl;
+	iov.iov_len = req.nl.nlmsg_len;
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	ret = sendmsg(sock, &msg, 0);
+	if (ret < 0) {
+		fprintf(stderr, "send to netlink: %s\n", strerror(errno));
+		ret = -errno;
+		goto cleanup;
+	}
+	memset(buf, 0, sizeof(buf));
+	nll = recv_msg(sa, sock);
+	if (nll < 0) {
+		fprintf(stderr, "recv from netlink: %s\n", strerror(nll));
+		ret = nll;
+		goto cleanup;
+	}
+	nh = (struct nlmsghdr *)buf;
+	read_arp(nh, nll);
+cleanup:
+	close(sock);
+	return ret;
+}
+
+/* Function to keep track and update changes in route and arp table
+ * Give regular statistics of packets forwarded
+ */
+static void *monitor_routes_thread(void *arg)
+{
+	struct pollfd fds_route, fds_arp;
+	struct sockaddr_nl la, lr;
+	int sock, sock_arp, nll;
+	struct nlmsghdr *nh;
+
+	sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (sock < 0) {
+		fprintf(stderr, "open netlink socket: %s\n", strerror(errno));
+		return NULL;
+	}
+
+	fcntl(sock, F_SETFL, O_NONBLOCK);
+	memset(&lr, 0, sizeof(lr));
+	lr.nl_family = AF_NETLINK;
+	lr.nl_groups = RTMGRP_IPV6_ROUTE | RTMGRP_IPV4_ROUTE | RTMGRP_NOTIFY;
+	if (bind(sock, (struct sockaddr *)&lr, sizeof(lr)) < 0) {
+		fprintf(stderr, "bind netlink socket: %s\n", strerror(errno));
+		close(sock);
+		return NULL;
+	}
+
+	fds_route.fd = sock;
+	fds_route.events = POLL_IN;
+
+	sock_arp = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+	if (sock_arp < 0) {
+		fprintf(stderr, "open netlink socket: %s\n", strerror(errno));
+		close(sock);
+		return NULL;
+	}
+
+	fcntl(sock_arp, F_SETFL, O_NONBLOCK);
+	memset(&la, 0, sizeof(la));
+	la.nl_family = AF_NETLINK;
+	la.nl_groups = RTMGRP_NEIGH | RTMGRP_NOTIFY;
+	if (bind(sock_arp, (struct sockaddr *)&la, sizeof(la)) < 0) {
+		fprintf(stderr, "bind netlink socket: %s\n", strerror(errno));
+		goto cleanup;
+	}
+
+	fds_arp.fd = sock_arp;
+	fds_arp.events = POLL_IN;
+
+	/* dump route and arp tables */
+	if (get_arp_table(AF_INET) < 0) {
+		fprintf(stderr, "Failed reading arp table\n");
+		goto cleanup;
+	}
+
+	if (get_route_table(AF_INET) < 0) {
+		fprintf(stderr, "Failed reading route table\n");
+		goto cleanup;
+	}
+
+	while (!routes_thread_exit) {
+		memset(buf, 0, sizeof(buf));
+		if (poll(&fds_route, 1, 3) == POLL_IN) {
+			nll = recv_msg(lr, sock);
+			if (nll < 0) {
+				fprintf(stderr, "recv from netlink: %s\n",
+					strerror(nll));
+				goto cleanup;
+			}
+
+			nh = (struct nlmsghdr *)buf;
+			read_route(nh, nll);
+		}
+
+		memset(buf, 0, sizeof(buf));
+		if (poll(&fds_arp, 1, 3) == POLL_IN) {
+			nll = recv_msg(la, sock_arp);
+			if (nll < 0) {
+				fprintf(stderr, "recv from netlink: %s\n",
+					strerror(nll));
+				goto cleanup;
+			}
+
+			nh = (struct nlmsghdr *)buf;
+			read_arp(nh, nll);
+		}
+
+		sleep(interval);
+	}
+
+cleanup:
+	close(sock_arp);
+	close(sock);
+	return NULL;
+}
+
+static void usage(char *argv[], const struct option *long_options,
+		  const char *doc, int mask, bool error,
+		  struct bpf_object *obj)
+{
+	sample_usage(argv, long_options, doc, mask, error);
+}
+
+int main(int argc, char **argv)
+{
+	bool error = true, generic = false, force = false;
+	int opt, ret = EXIT_FAIL_BPF;
+	struct xdp_router_ipv4 *skel;
+	int i, total_ifindex = argc - 1;
+	char **ifname_list = argv + 1;
+	pthread_t routes_thread;
+	int longindex = 0;
+
+	if (libbpf_set_strict_mode(LIBBPF_STRICT_ALL) < 0) {
+		fprintf(stderr, "Failed to set libbpf strict mode: %s\n",
+			strerror(errno));
+		goto end;
+	}
+
+	skel = xdp_router_ipv4__open();
+	if (!skel) {
+		fprintf(stderr, "Failed to xdp_router_ipv4__open: %s\n",
+			strerror(errno));
+		goto end;
+	}
+
+	ret = sample_init_pre_load(skel);
+	if (ret < 0) {
+		fprintf(stderr, "Failed to sample_init_pre_load: %s\n",
+			strerror(-ret));
+		ret = EXIT_FAIL_BPF;
+		goto end_destroy;
+	}
+
+	ret = xdp_router_ipv4__load(skel);
+	if (ret < 0) {
+		fprintf(stderr, "Failed to xdp_router_ipv4__load: %s\n",
+			strerror(errno));
+		goto end_destroy;
+	}
+
+	ret = sample_init(skel, mask);
+	if (ret < 0) {
+		fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret));
+		ret = EXIT_FAIL;
+		goto end_destroy;
+	}
+
+	while ((opt = getopt_long(argc, argv, "si:SFvh",
+				  long_options, &longindex)) != -1) {
+		switch (opt) {
+		case 's':
+			mask |= SAMPLE_REDIRECT_MAP_CNT;
+			total_ifindex--;
+			ifname_list++;
+			break;
+		case 'i':
+			interval = strtoul(optarg, NULL, 0);
+			total_ifindex -= 2;
+			ifname_list += 2;
+			break;
+		case 'S':
+			generic = true;
+			total_ifindex--;
+			ifname_list++;
+			break;
+		case 'F':
+			force = true;
+			total_ifindex--;
+			ifname_list++;
+			break;
+		case 'v':
+			sample_switch_mode();
+			total_ifindex--;
+			ifname_list++;
+			break;
+		case 'h':
+			error = false;
+		default:
+			usage(argv, long_options, __doc__, mask, error, skel->obj);
+			goto end_destroy;
+		}
+	}
+
+	ret = EXIT_FAIL_OPTION;
+	if (optind == argc) {
+		usage(argv, long_options, __doc__, mask, true, skel->obj);
+		goto end_destroy;
+	}
+
+	lpm_map_fd = bpf_map__fd(skel->maps.lpm_map);
+	if (lpm_map_fd < 0) {
+		fprintf(stderr, "Failed loading lpm_map %s\n",
+			strerror(-lpm_map_fd));
+		goto end_destroy;
+	}
+	arp_table_map_fd = bpf_map__fd(skel->maps.arp_table);
+	if (arp_table_map_fd < 0) {
+		fprintf(stderr, "Failed loading arp_table_map_fd %s\n",
+			strerror(-arp_table_map_fd));
+		goto end_destroy;
+	}
+	exact_match_map_fd = bpf_map__fd(skel->maps.exact_match);
+	if (exact_match_map_fd < 0) {
+		fprintf(stderr, "Failed loading exact_match_map_fd %s\n",
+			strerror(-exact_match_map_fd));
+		goto end_destroy;
+	}
+	tx_port_map_fd = bpf_map__fd(skel->maps.tx_port);
+	if (tx_port_map_fd < 0) {
+		fprintf(stderr, "Failed loading tx_port_map_fd %s\n",
+			strerror(-tx_port_map_fd));
+		goto end_destroy;
+	}
+
+	ret = EXIT_FAIL_XDP;
+	for (i = 0; i < total_ifindex; i++) {
+		int index = if_nametoindex(ifname_list[i]);
+
+		if (!index) {
+			fprintf(stderr, "Interface %s not found %s\n",
+				ifname_list[i], strerror(-tx_port_map_fd));
+			goto end_destroy;
+		}
+		if (sample_install_xdp(skel->progs.xdp_router_ipv4_prog,
+				       index, generic, force) < 0)
+			goto end_destroy;
+	}
+
+	ret = pthread_create(&routes_thread, NULL, monitor_routes_thread, NULL);
+	if (ret) {
+		fprintf(stderr, "Failed creating routes_thread: %s\n", strerror(-ret));
+		ret = EXIT_FAIL;
+		goto end_destroy;
+	}
+
+	ret = sample_run(interval, NULL, NULL);
+	routes_thread_exit = true;
+
+	if (ret < 0) {
+		fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret));
+		ret = EXIT_FAIL;
+		goto end_thread_wait;
+	}
+	ret = EXIT_OK;
+
+end_thread_wait:
+	pthread_join(routes_thread, NULL);
+end_destroy:
+	xdp_router_ipv4__destroy(skel);
+end:
+	sample_exit(ret);
+}