bpf, samples: Remove AF_XDP samples

Remove the AF_XDP samples from samples/bpf/ as they are dependent on
the AF_XDP support in libbpf. This support has now been removed in the
1.0 release, so these samples cannot be compiled anymore. Please start
to use libxdp instead. It is backwards compatible with the AF_XDP
support that was offered in libbpf. New samples can be found in the
various xdp-project repositories connected to libxdp and by googling.

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/20220630093717.8664-1-magnus.karlsson@gmail.com

6 files changed, 0 insertions, 3346 deletions

diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 03e3d3529ac9..5002a5b9a7da 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -45,9 +45,6 @@ tprogs-y += xdp_rxq_info
 tprogs-y += syscall_tp
 tprogs-y += cpustat
 tprogs-y += xdp_adjust_tail
-tprogs-y += xdpsock
-tprogs-y += xdpsock_ctrl_proc
-tprogs-y += xsk_fwd
 tprogs-y += xdp_fwd
 tprogs-y += task_fd_query
 tprogs-y += xdp_sample_pkts
@@ -109,9 +106,6 @@ xdp_rxq_info-objs := xdp_rxq_info_user.o
 syscall_tp-objs := syscall_tp_user.o
 cpustat-objs := cpustat_user.o
 xdp_adjust_tail-objs := xdp_adjust_tail_user.o
-xdpsock-objs := xdpsock_user.o
-xdpsock_ctrl_proc-objs := xdpsock_ctrl_proc.o
-xsk_fwd-objs := xsk_fwd.o
 xdp_fwd-objs := xdp_fwd_user.o
 task_fd_query-objs := task_fd_query_user.o $(TRACE_HELPERS)
 xdp_sample_pkts-objs := xdp_sample_pkts_user.o
@@ -179,7 +173,6 @@ always-y += xdp_sample_pkts_kern.o
 always-y += ibumad_kern.o
 always-y += hbm_out_kern.o
 always-y += hbm_edt_kern.o
-always-y += xdpsock_kern.o
 
 ifeq ($(ARCH), arm)
 # Strip all except -D__LINUX_ARM_ARCH__ option needed to handle linux
@@ -224,8 +217,6 @@ TPROGLDLIBS_tracex4		+= -lrt
 TPROGLDLIBS_trace_output	+= -lrt
 TPROGLDLIBS_map_perf_test	+= -lrt
 TPROGLDLIBS_test_overhead	+= -lrt
-TPROGLDLIBS_xdpsock		+= -pthread -lcap
-TPROGLDLIBS_xsk_fwd		+= -pthread
 
 # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline:
 # make M=samples/bpf LLC=~/git/llvm-project/llvm/build/bin/llc CLANG=~/git/llvm-project/llvm/build/bin/clang
diff --git a/samples/bpf/xdpsock.h b/samples/bpf/xdpsock.h
deleted file mode 100644
index fd70cce60712..000000000000
--- a/samples/bpf/xdpsock.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0
- *
- * Copyright(c) 2019 Intel Corporation.
- */
-
-#ifndef XDPSOCK_H_
-#define XDPSOCK_H_
-
-#define MAX_SOCKS 4
-
-#define SOCKET_NAME "sock_cal_bpf_fd"
-#define MAX_NUM_OF_CLIENTS 10
-
-#define CLOSE_CONN  1
-
-typedef __u64 u64;
-typedef __u32 u32;
-
-#endif /* XDPSOCK_H */
diff --git a/samples/bpf/xdpsock_ctrl_proc.c b/samples/bpf/xdpsock_ctrl_proc.c
deleted file mode 100644
index 28b5f2a9fa08..000000000000
--- a/samples/bpf/xdpsock_ctrl_proc.c
+++ /dev/null
@@ -1,190 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 2017 - 2018 Intel Corporation. */
-
-#include <errno.h>
-#include <getopt.h>
-#include <libgen.h>
-#include <net/if.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <unistd.h>
-
-#include <bpf/bpf.h>
-#include <bpf/xsk.h>
-#include "xdpsock.h"
-
-/* libbpf APIs for AF_XDP are deprecated starting from v0.7 */
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-
-static const char *opt_if = "";
-
-static struct option long_options[] = {
-	{"interface", required_argument, 0, 'i'},
-	{0, 0, 0, 0}
-};
-
-static void usage(const char *prog)
-{
-	const char *str =
-		"  Usage: %s [OPTIONS]\n"
-		"  Options:\n"
-		"  -i, --interface=n	Run on interface n\n"
-		"\n";
-	fprintf(stderr, "%s\n", str);
-
-	exit(0);
-}
-
-static void parse_command_line(int argc, char **argv)
-{
-	int option_index, c;
-
-	opterr = 0;
-
-	for (;;) {
-		c = getopt_long(argc, argv, "i:",
-				long_options, &option_index);
-		if (c == -1)
-			break;
-
-		switch (c) {
-		case 'i':
-			opt_if = optarg;
-			break;
-		default:
-			usage(basename(argv[0]));
-		}
-	}
-}
-
-static int send_xsks_map_fd(int sock, int fd)
-{
-	char cmsgbuf[CMSG_SPACE(sizeof(int))];
-	struct msghdr msg;
-	struct iovec iov;
-	int value = 0;
-
-	if (fd == -1) {
-		fprintf(stderr, "Incorrect fd = %d\n", fd);
-		return -1;
-	}
-	iov.iov_base = &value;
-	iov.iov_len = sizeof(int);
-
-	msg.msg_name = NULL;
-	msg.msg_namelen = 0;
-	msg.msg_iov = &iov;
-	msg.msg_iovlen = 1;
-	msg.msg_flags = 0;
-	msg.msg_control = cmsgbuf;
-	msg.msg_controllen = CMSG_LEN(sizeof(int));
-
-	struct cmsghdr *cmsg = CMSG_FIRSTHDR(&msg);
-
-	cmsg->cmsg_level = SOL_SOCKET;
-	cmsg->cmsg_type = SCM_RIGHTS;
-	cmsg->cmsg_len = CMSG_LEN(sizeof(int));
-
-	*(int *)CMSG_DATA(cmsg) = fd;
-	int ret = sendmsg(sock, &msg, 0);
-
-	if (ret == -1) {
-		fprintf(stderr, "Sendmsg failed with %s", strerror(errno));
-		return -errno;
-	}
-
-	return ret;
-}
-
-int
-main(int argc, char **argv)
-{
-	struct sockaddr_un server;
-	int listening = 1;
-	int rval, msgsock;
-	int ifindex = 0;
-	int flag = 1;
-	int cmd = 0;
-	int sock;
-	int err;
-	int xsks_map_fd;
-
-	parse_command_line(argc, argv);
-
-	ifindex = if_nametoindex(opt_if);
-	if (ifindex == 0) {
-		fprintf(stderr, "Unable to get ifindex for Interface %s. Reason:%s",
-			opt_if, strerror(errno));
-		return -errno;
-	}
-
-	sock = socket(AF_UNIX, SOCK_STREAM, 0);
-	if (sock < 0) {
-		fprintf(stderr, "Opening socket stream failed: %s", strerror(errno));
-		return -errno;
-	}
-
-	server.sun_family = AF_UNIX;
-	strcpy(server.sun_path, SOCKET_NAME);
-
-	setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof(int));
-
-	if (bind(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_un))) {
-		fprintf(stderr, "Binding to socket stream failed: %s", strerror(errno));
-		return -errno;
-	}
-
-	listen(sock, MAX_NUM_OF_CLIENTS);
-
-	err = xsk_setup_xdp_prog(ifindex, &xsks_map_fd);
-	if (err) {
-		fprintf(stderr, "Setup of xdp program failed\n");
-		goto close_sock;
-	}
-
-	while (listening) {
-		msgsock = accept(sock, 0, 0);
-		if (msgsock == -1) {
-			fprintf(stderr, "Error accepting connection: %s", strerror(errno));
-			err = -errno;
-			goto close_sock;
-		}
-		err = send_xsks_map_fd(msgsock, xsks_map_fd);
-		if (err <= 0) {
-			fprintf(stderr, "Error %d sending xsks_map_fd\n", err);
-			goto cleanup;
-		}
-		do {
-			rval = read(msgsock, &cmd, sizeof(int));
-			if (rval < 0) {
-				fprintf(stderr, "Error reading stream message");
-			} else {
-				if (cmd != CLOSE_CONN)
-					fprintf(stderr, "Recv unknown cmd = %d\n", cmd);
-				listening = 0;
-				break;
-			}
-		} while (rval > 0);
-	}
-	close(msgsock);
-	close(sock);
-	unlink(SOCKET_NAME);
-
-	/* Unset fd for given ifindex */
-	err = bpf_xdp_detach(ifindex, 0, NULL);
-	if (err) {
-		fprintf(stderr, "Error when unsetting bpf prog_fd for ifindex(%d)\n", ifindex);
-		return err;
-	}
-
-	return 0;
-
-cleanup:
-	close(msgsock);
-close_sock:
-	close(sock);
-	unlink(SOCKET_NAME);
-	return err;
-}
diff --git a/samples/bpf/xdpsock_kern.c b/samples/bpf/xdpsock_kern.c
deleted file mode 100644
index 05430484375c..000000000000
--- a/samples/bpf/xdpsock_kern.c
+++ /dev/null
@@ -1,24 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/bpf.h>
-#include <bpf/bpf_helpers.h>
-#include "xdpsock.h"
-
-/* This XDP program is only needed for the XDP_SHARED_UMEM mode.
- * If you do not use this mode, libbpf can supply an XDP program for you.
- */
-
-struct {
-	__uint(type, BPF_MAP_TYPE_XSKMAP);
-	__uint(max_entries, MAX_SOCKS);
-	__uint(key_size, sizeof(int));
-	__uint(value_size, sizeof(int));
-} xsks_map SEC(".maps");
-
-static unsigned int rr;
-
-SEC("xdp_sock") int xdp_sock_prog(struct xdp_md *ctx)
-{
-	rr = (rr + 1) & (MAX_SOCKS - 1);
-
-	return bpf_redirect_map(&xsks_map, rr, XDP_DROP);
-}
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
deleted file mode 100644
index be7d2572e3e6..000000000000
--- a/samples/bpf/xdpsock_user.c
+++ /dev/null
@@ -1,2019 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 2017 - 2018 Intel Corporation. */
-
-#include <errno.h>
-#include <getopt.h>
-#include <libgen.h>
-#include <linux/bpf.h>
-#include <linux/if_link.h>
-#include <linux/if_xdp.h>
-#include <linux/if_ether.h>
-#include <linux/ip.h>
-#include <linux/limits.h>
-#include <linux/udp.h>
-#include <arpa/inet.h>
-#include <locale.h>
-#include <net/ethernet.h>
-#include <netinet/ether.h>
-#include <net/if.h>
-#include <poll.h>
-#include <pthread.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/capability.h>
-#include <sys/mman.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <sys/un.h>
-#include <time.h>
-#include <unistd.h>
-#include <sched.h>
-
-#include <bpf/libbpf.h>
-#include <bpf/xsk.h>
-#include <bpf/bpf.h>
-#include "xdpsock.h"
-
-/* libbpf APIs for AF_XDP are deprecated starting from v0.7 */
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-
-#ifndef SOL_XDP
-#define SOL_XDP 283
-#endif
-
-#ifndef AF_XDP
-#define AF_XDP 44
-#endif
-
-#ifndef PF_XDP
-#define PF_XDP AF_XDP
-#endif
-
-#define NUM_FRAMES (4 * 1024)
-#define MIN_PKT_SIZE 64
-
-#define DEBUG_HEXDUMP 0
-
-#define VLAN_PRIO_MASK		0xe000 /* Priority Code Point */
-#define VLAN_PRIO_SHIFT		13
-#define VLAN_VID_MASK		0x0fff /* VLAN Identifier */
-#define VLAN_VID__DEFAULT	1
-#define VLAN_PRI__DEFAULT	0
-
-#define NSEC_PER_SEC		1000000000UL
-#define NSEC_PER_USEC		1000
-
-#define SCHED_PRI__DEFAULT	0
-
-typedef __u64 u64;
-typedef __u32 u32;
-typedef __u16 u16;
-typedef __u8  u8;
-
-static unsigned long prev_time;
-static long tx_cycle_diff_min;
-static long tx_cycle_diff_max;
-static double tx_cycle_diff_ave;
-static long tx_cycle_cnt;
-
-enum benchmark_type {
-	BENCH_RXDROP = 0,
-	BENCH_TXONLY = 1,
-	BENCH_L2FWD = 2,
-};
-
-static enum benchmark_type opt_bench = BENCH_RXDROP;
-static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
-static const char *opt_if = "";
-static int opt_ifindex;
-static int opt_queue;
-static unsigned long opt_duration;
-static unsigned long start_time;
-static bool benchmark_done;
-static u32 opt_batch_size = 64;
-static int opt_pkt_count;
-static u16 opt_pkt_size = MIN_PKT_SIZE;
-static u32 opt_pkt_fill_pattern = 0x12345678;
-static bool opt_vlan_tag;
-static u16 opt_pkt_vlan_id = VLAN_VID__DEFAULT;
-static u16 opt_pkt_vlan_pri = VLAN_PRI__DEFAULT;
-static struct ether_addr opt_txdmac = {{ 0x3c, 0xfd, 0xfe,
-					 0x9e, 0x7f, 0x71 }};
-static struct ether_addr opt_txsmac = {{ 0xec, 0xb1, 0xd7,
-					 0x98, 0x3a, 0xc0 }};
-static bool opt_extra_stats;
-static bool opt_quiet;
-static bool opt_app_stats;
-static const char *opt_irq_str = "";
-static u32 irq_no;
-static int irqs_at_init = -1;
-static u32 sequence;
-static int opt_poll;
-static int opt_interval = 1;
-static int opt_retries = 3;
-static u32 opt_xdp_bind_flags = XDP_USE_NEED_WAKEUP;
-static u32 opt_umem_flags;
-static int opt_unaligned_chunks;
-static int opt_mmap_flags;
-static int opt_xsk_frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
-static int opt_timeout = 1000;
-static bool opt_need_wakeup = true;
-static u32 opt_num_xsks = 1;
-static u32 prog_id;
-static bool opt_busy_poll;
-static bool opt_reduced_cap;
-static clockid_t opt_clock = CLOCK_MONOTONIC;
-static unsigned long opt_tx_cycle_ns;
-static int opt_schpolicy = SCHED_OTHER;
-static int opt_schprio = SCHED_PRI__DEFAULT;
-static bool opt_tstamp;
-
-struct vlan_ethhdr {
-	unsigned char h_dest[6];
-	unsigned char h_source[6];
-	__be16 h_vlan_proto;
-	__be16 h_vlan_TCI;
-	__be16 h_vlan_encapsulated_proto;
-};
-
-#define PKTGEN_MAGIC 0xbe9be955
-struct pktgen_hdr {
-	__be32 pgh_magic;
-	__be32 seq_num;
-	__be32 tv_sec;
-	__be32 tv_usec;
-};
-
-struct xsk_ring_stats {
-	unsigned long rx_npkts;
-	unsigned long tx_npkts;
-	unsigned long rx_dropped_npkts;
-	unsigned long rx_invalid_npkts;
-	unsigned long tx_invalid_npkts;
-	unsigned long rx_full_npkts;
-	unsigned long rx_fill_empty_npkts;
-	unsigned long tx_empty_npkts;
-	unsigned long prev_rx_npkts;
-	unsigned long prev_tx_npkts;
-	unsigned long prev_rx_dropped_npkts;
-	unsigned long prev_rx_invalid_npkts;
-	unsigned long prev_tx_invalid_npkts;
-	unsigned long prev_rx_full_npkts;
-	unsigned long prev_rx_fill_empty_npkts;
-	unsigned long prev_tx_empty_npkts;
-};
-
-struct xsk_driver_stats {
-	unsigned long intrs;
-	unsigned long prev_intrs;
-};
-
-struct xsk_app_stats {
-	unsigned long rx_empty_polls;
-	unsigned long fill_fail_polls;
-	unsigned long copy_tx_sendtos;
-	unsigned long tx_wakeup_sendtos;
-	unsigned long opt_polls;
-	unsigned long prev_rx_empty_polls;
-	unsigned long prev_fill_fail_polls;
-	unsigned long prev_copy_tx_sendtos;
-	unsigned long prev_tx_wakeup_sendtos;
-	unsigned long prev_opt_polls;
-};
-
-struct xsk_umem_info {
-	struct xsk_ring_prod fq;
-	struct xsk_ring_cons cq;
-	struct xsk_umem *umem;
-	void *buffer;
-};
-
-struct xsk_socket_info {
-	struct xsk_ring_cons rx;
-	struct xsk_ring_prod tx;
-	struct xsk_umem_info *umem;
-	struct xsk_socket *xsk;
-	struct xsk_ring_stats ring_stats;
-	struct xsk_app_stats app_stats;
-	struct xsk_driver_stats drv_stats;
-	u32 outstanding_tx;
-};
-
-static const struct clockid_map {
-	const char *name;
-	clockid_t clockid;
-} clockids_map[] = {
-	{ "REALTIME", CLOCK_REALTIME },
-	{ "TAI", CLOCK_TAI },
-	{ "BOOTTIME", CLOCK_BOOTTIME },
-	{ "MONOTONIC", CLOCK_MONOTONIC },
-	{ NULL }
-};
-
-static const struct sched_map {
-	const char *name;
-	int policy;
-} schmap[] = {
-	{ "OTHER", SCHED_OTHER },
-	{ "FIFO", SCHED_FIFO },
-	{ NULL }
-};
-
-static int num_socks;
-struct xsk_socket_info *xsks[MAX_SOCKS];
-int sock;
-
-static int get_clockid(clockid_t *id, const char *name)
-{
-	const struct clockid_map *clk;
-
-	for (clk = clockids_map; clk->name; clk++) {
-		if (strcasecmp(clk->name, name) == 0) {
-			*id = clk->clockid;
-			return 0;
-		}
-	}
-
-	return -1;
-}
-
-static int get_schpolicy(int *policy, const char *name)
-{
-	const struct sched_map *sch;
-
-	for (sch = schmap; sch->name; sch++) {
-		if (strcasecmp(sch->name, name) == 0) {
-			*policy = sch->policy;
-			return 0;
-		}
-	}
-
-	return -1;
-}
-
-static unsigned long get_nsecs(void)
-{
-	struct timespec ts;
-
-	clock_gettime(opt_clock, &ts);
-	return ts.tv_sec * 1000000000UL + ts.tv_nsec;
-}
-
-static void print_benchmark(bool running)
-{
-	const char *bench_str = "INVALID";
-
-	if (opt_bench == BENCH_RXDROP)
-		bench_str = "rxdrop";
-	else if (opt_bench == BENCH_TXONLY)
-		bench_str = "txonly";
-	else if (opt_bench == BENCH_L2FWD)
-		bench_str = "l2fwd";
-
-	printf("%s:%d %s ", opt_if, opt_queue, bench_str);
-	if (opt_xdp_flags & XDP_FLAGS_SKB_MODE)
-		printf("xdp-skb ");
-	else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE)
-		printf("xdp-drv ");
-	else
-		printf("	");
-
-	if (opt_poll)
-		printf("poll() ");
-
-	if (running) {
-		printf("running...");
-		fflush(stdout);
-	}
-}
-
-static int xsk_get_xdp_stats(int fd, struct xsk_socket_info *xsk)
-{
-	struct xdp_statistics stats;
-	socklen_t optlen;
-	int err;
-
-	optlen = sizeof(stats);
-	err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, &stats, &optlen);
-	if (err)
-		return err;
-
-	if (optlen == sizeof(struct xdp_statistics)) {
-		xsk->ring_stats.rx_dropped_npkts = stats.rx_dropped;
-		xsk->ring_stats.rx_invalid_npkts = stats.rx_invalid_descs;
-		xsk->ring_stats.tx_invalid_npkts = stats.tx_invalid_descs;
-		xsk->ring_stats.rx_full_npkts = stats.rx_ring_full;
-		xsk->ring_stats.rx_fill_empty_npkts = stats.rx_fill_ring_empty_descs;
-		xsk->ring_stats.tx_empty_npkts = stats.tx_ring_empty_descs;
-		return 0;
-	}
-
-	return -EINVAL;
-}
-
-static void dump_app_stats(long dt)
-{
-	int i;
-
-	for (i = 0; i < num_socks && xsks[i]; i++) {
-		char *fmt = "%-18s %'-14.0f %'-14lu\n";
-		double rx_empty_polls_ps, fill_fail_polls_ps, copy_tx_sendtos_ps,
-				tx_wakeup_sendtos_ps, opt_polls_ps;
-
-		rx_empty_polls_ps = (xsks[i]->app_stats.rx_empty_polls -
-					xsks[i]->app_stats.prev_rx_empty_polls) * 1000000000. / dt;
-		fill_fail_polls_ps = (xsks[i]->app_stats.fill_fail_polls -
-					xsks[i]->app_stats.prev_fill_fail_polls) * 1000000000. / dt;
-		copy_tx_sendtos_ps = (xsks[i]->app_stats.copy_tx_sendtos -
-					xsks[i]->app_stats.prev_copy_tx_sendtos) * 1000000000. / dt;
-		tx_wakeup_sendtos_ps = (xsks[i]->app_stats.tx_wakeup_sendtos -
-					xsks[i]->app_stats.prev_tx_wakeup_sendtos)
-										* 1000000000. / dt;
-		opt_polls_ps = (xsks[i]->app_stats.opt_polls -
-					xsks[i]->app_stats.prev_opt_polls) * 1000000000. / dt;
-
-		printf("\n%-18s %-14s %-14s\n", "", "calls/s", "count");
-		printf(fmt, "rx empty polls", rx_empty_polls_ps, xsks[i]->app_stats.rx_empty_polls);
-		printf(fmt, "fill fail polls", fill_fail_polls_ps,
-							xsks[i]->app_stats.fill_fail_polls);
-		printf(fmt, "copy tx sendtos", copy_tx_sendtos_ps,
-							xsks[i]->app_stats.copy_tx_sendtos);
-		printf(fmt, "tx wakeup sendtos", tx_wakeup_sendtos_ps,
-							xsks[i]->app_stats.tx_wakeup_sendtos);
-		printf(fmt, "opt polls", opt_polls_ps, xsks[i]->app_stats.opt_polls);
-
-		xsks[i]->app_stats.prev_rx_empty_polls = xsks[i]->app_stats.rx_empty_polls;
-		xsks[i]->app_stats.prev_fill_fail_polls = xsks[i]->app_stats.fill_fail_polls;
-		xsks[i]->app_stats.prev_copy_tx_sendtos = xsks[i]->app_stats.copy_tx_sendtos;
-		xsks[i]->app_stats.prev_tx_wakeup_sendtos = xsks[i]->app_stats.tx_wakeup_sendtos;
-		xsks[i]->app_stats.prev_opt_polls = xsks[i]->app_stats.opt_polls;
-	}
-
-	if (opt_tx_cycle_ns) {
-		printf("\n%-18s %-10s %-10s %-10s %-10s %-10s\n",
-		       "", "period", "min", "ave", "max", "cycle");
-		printf("%-18s %-10lu %-10lu %-10lu %-10lu %-10lu\n",
-		       "Cyclic TX", opt_tx_cycle_ns, tx_cycle_diff_min,
-		       (long)(tx_cycle_diff_ave / tx_cycle_cnt),
-		       tx_cycle_diff_max, tx_cycle_cnt);
-	}
-}
-
-static bool get_interrupt_number(void)
-{
-	FILE *f_int_proc;
-	char line[4096];
-	bool found = false;
-
-	f_int_proc = fopen("/proc/interrupts", "r");
-	if (f_int_proc == NULL) {
-		printf("Failed to open /proc/interrupts.\n");
-		return found;
-	}
-
-	while (!feof(f_int_proc) && !found) {
-		/* Make sure to read a full line at a time */
-		if (fgets(line, sizeof(line), f_int_proc) == NULL ||
-				line[strlen(line) - 1] != '\n') {
-			printf("Error reading from interrupts file\n");
-			break;
-		}
-
-		/* Extract interrupt number from line */
-		if (strstr(line, opt_irq_str) != NULL) {
-			irq_no = atoi(line);
-			found = true;
-			break;
-		}
-	}
-
-	fclose(f_int_proc);
-
-	return found;
-}
-
-static int get_irqs(void)
-{
-	char count_path[PATH_MAX];
-	int total_intrs = -1;
-	FILE *f_count_proc;
-	char line[4096];
-
-	snprintf(count_path, sizeof(count_path),
-		"/sys/kernel/irq/%i/per_cpu_count", irq_no);
-	f_count_proc = fopen(count_path, "r");
-	if (f_count_proc == NULL) {
-		printf("Failed to open %s\n", count_path);
-		return total_intrs;
-	}
-
-	if (fgets(line, sizeof(line), f_count_proc) == NULL ||
-			line[strlen(line) - 1] != '\n') {
-		printf("Error reading from %s\n", count_path);
-	} else {
-		static const char com[2] = ",";
-		char *token;
-
-		total_intrs = 0;
-		token = strtok(line, com);
-		while (token != NULL) {
-			/* sum up interrupts across all cores */
-			total_intrs += atoi(token);
-			token = strtok(NULL, com);
-		}
-	}
-
-	fclose(f_count_proc);
-
-	return total_intrs;
-}
-
-static void dump_driver_stats(long dt)
-{
-	int i;
-
-	for (i = 0; i < num_socks && xsks[i]; i++) {
-		char *fmt = "%-18s %'-14.0f %'-14lu\n";
-		double intrs_ps;
-		int n_ints = get_irqs();
-
-		if (n_ints < 0) {
-			printf("error getting intr info for intr %i\n", irq_no);
-			return;
-		}
-		xsks[i]->drv_stats.intrs = n_ints - irqs_at_init;
-
-		intrs_ps = (xsks[i]->drv_stats.intrs - xsks[i]->drv_stats.prev_intrs) *
-			 1000000000. / dt;
-
-		printf("\n%-18s %-14s %-14s\n", "", "intrs/s", "count");
-		printf(fmt, "irqs", intrs_ps, xsks[i]->drv_stats.intrs);
-
-		xsks[i]->drv_stats.prev_intrs = xsks[i]->drv_stats.intrs;
-	}
-}
-
-static void dump_stats(void)
-{
-	unsigned long now = get_nsecs();
-	long dt = now - prev_time;
-	int i;
-
-	prev_time = now;
-
-	for (i = 0; i < num_socks && xsks[i]; i++) {
-		char *fmt = "%-18s %'-14.0f %'-14lu\n";
-		double rx_pps, tx_pps, dropped_pps, rx_invalid_pps, full_pps, fill_empty_pps,
-			tx_invalid_pps, tx_empty_pps;
-
-		rx_pps = (xsks[i]->ring_stats.rx_npkts - xsks[i]->ring_stats.prev_rx_npkts) *
-			 1000000000. / dt;
-		tx_pps = (xsks[i]->ring_stats.tx_npkts - xsks[i]->ring_stats.prev_tx_npkts) *
-			 1000000000. / dt;
-
-		printf("\n sock%d@", i);
-		print_benchmark(false);
-		printf("\n");
-
-		printf("%-18s %-14s %-14s %-14.2f\n", "", "pps", "pkts",
-		       dt / 1000000000.);
-		printf(fmt, "rx", rx_pps, xsks[i]->ring_stats.rx_npkts);
-		printf(fmt, "tx", tx_pps, xsks[i]->ring_stats.tx_npkts);
-
-		xsks[i]->ring_stats.prev_rx_npkts = xsks[i]->ring_stats.rx_npkts;
-		xsks[i]->ring_stats.prev_tx_npkts = xsks[i]->ring_stats.tx_npkts;
-
-		if (opt_extra_stats) {
-			if (!xsk_get_xdp_stats(xsk_socket__fd(xsks[i]->xsk), xsks[i])) {
-				dropped_pps = (xsks[i]->ring_stats.rx_dropped_npkts -
-						xsks[i]->ring_stats.prev_rx_dropped_npkts) *
-							1000000000. / dt;
-				rx_invalid_pps = (xsks[i]->ring_stats.rx_invalid_npkts -
-						xsks[i]->ring_stats.prev_rx_invalid_npkts) *
-							1000000000. / dt;
-				tx_invalid_pps = (xsks[i]->ring_stats.tx_invalid_npkts -
-						xsks[i]->ring_stats.prev_tx_invalid_npkts) *
-							1000000000. / dt;
-				full_pps = (xsks[i]->ring_stats.rx_full_npkts -
-						xsks[i]->ring_stats.prev_rx_full_npkts) *
-							1000000000. / dt;
-				fill_empty_pps = (xsks[i]->ring_stats.rx_fill_empty_npkts -
-						xsks[i]->ring_stats.prev_rx_fill_empty_npkts) *
-							1000000000. / dt;
-				tx_empty_pps = (xsks[i]->ring_stats.tx_empty_npkts -
-						xsks[i]->ring_stats.prev_tx_empty_npkts) *
-							1000000000. / dt;
-
-				printf(fmt, "rx dropped", dropped_pps,
-				       xsks[i]->ring_stats.rx_dropped_npkts);
-				printf(fmt, "rx invalid", rx_invalid_pps,
-				       xsks[i]->ring_stats.rx_invalid_npkts);
-				printf(fmt, "tx invalid", tx_invalid_pps,
-				       xsks[i]->ring_stats.tx_invalid_npkts);
-				printf(fmt, "rx queue full", full_pps,
-				       xsks[i]->ring_stats.rx_full_npkts);
-				printf(fmt, "fill ring empty", fill_empty_pps,
-				       xsks[i]->ring_stats.rx_fill_empty_npkts);
-				printf(fmt, "tx ring empty", tx_empty_pps,
-				       xsks[i]->ring_stats.tx_empty_npkts);
-
-				xsks[i]->ring_stats.prev_rx_dropped_npkts =
-					xsks[i]->ring_stats.rx_dropped_npkts;
-				xsks[i]->ring_stats.prev_rx_invalid_npkts =
-					xsks[i]->ring_stats.rx_invalid_npkts;
-				xsks[i]->ring_stats.prev_tx_invalid_npkts =
-					xsks[i]->ring_stats.tx_invalid_npkts;
-				xsks[i]->ring_stats.prev_rx_full_npkts =
-					xsks[i]->ring_stats.rx_full_npkts;
-				xsks[i]->ring_stats.prev_rx_fill_empty_npkts =
-					xsks[i]->ring_stats.rx_fill_empty_npkts;
-				xsks[i]->ring_stats.prev_tx_empty_npkts =
-					xsks[i]->ring_stats.tx_empty_npkts;
-			} else {
-				printf("%-15s\n", "Error retrieving extra stats");
-			}
-		}
-	}
-
-	if (opt_app_stats)
-		dump_app_stats(dt);
-	if (irq_no)
-		dump_driver_stats(dt);
-}
-
-static bool is_benchmark_done(void)
-{
-	if (opt_duration > 0) {
-		unsigned long dt = (get_nsecs() - start_time);
-
-		if (dt >= opt_duration)
-			benchmark_done = true;
-	}
-	return benchmark_done;
-}
-
-static void *poller(void *arg)
-{
-	(void)arg;
-	while (!is_benchmark_done()) {
-		sleep(opt_interval);
-		dump_stats();
-	}
-
-	return NULL;
-}
-
-static void remove_xdp_program(void)
-{
-	u32 curr_prog_id = 0;
-
-	if (bpf_xdp_query_id(opt_ifindex, opt_xdp_flags, &curr_prog_id)) {
-		printf("bpf_xdp_query_id failed\n");
-		exit(EXIT_FAILURE);
-	}
-
-	if (prog_id == curr_prog_id)
-		bpf_xdp_detach(opt_ifindex, opt_xdp_flags, NULL);
-	else if (!curr_prog_id)
-		printf("couldn't find a prog id on a given interface\n");
-	else
-		printf("program on interface changed, not removing\n");
-}
-
-static void int_exit(int sig)
-{
-	benchmark_done = true;
-}
-
-static void __exit_with_error(int error, const char *file, const char *func,
-			      int line)
-{
-	fprintf(stderr, "%s:%s:%i: errno: %d/\"%s\"\n", file, func,
-		line, error, strerror(error));
-
-	if (opt_num_xsks > 1)
-		remove_xdp_program();
-	exit(EXIT_FAILURE);
-}
-
-#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, __LINE__)
-
-static void xdpsock_cleanup(void)
-{
-	struct xsk_umem *umem = xsks[0]->umem->umem;
-	int i, cmd = CLOSE_CONN;
-
-	dump_stats();
-	for (i = 0; i < num_socks; i++)
-		xsk_socket__delete(xsks[i]->xsk);
-	(void)xsk_umem__delete(umem);
-
-	if (opt_reduced_cap) {
-		if (write(sock, &cmd, sizeof(int)) < 0)
-			exit_with_error(errno);
-	}
-
-	if (opt_num_xsks > 1)
-		remove_xdp_program();
-}
-
-static void swap_mac_addresses(void *data)
-{
-	struct ether_header *eth = (struct ether_header *)data;
-	struct ether_addr *src_addr = (struct ether_addr *)&eth->ether_shost;
-	struct ether_addr *dst_addr = (struct ether_addr *)&eth->ether_dhost;
-	struct ether_addr tmp;
-
-	tmp = *src_addr;
-	*src_addr = *dst_addr;
-	*dst_addr = tmp;
-}
-
-static void hex_dump(void *pkt, size_t length, u64 addr)
-{
-	const unsigned char *address = (unsigned char *)pkt;
-	const unsigned char *line = address;
-	size_t line_size = 32;
-	unsigned char c;
-	char buf[32];
-	int i = 0;
-
-	if (!DEBUG_HEXDUMP)
-		return;
-
-	sprintf(buf, "addr=%llu", addr);
-	printf("length = %zu\n", length);
-	printf("%s | ", buf);
-	while (length-- > 0) {
-		printf("%02X ", *address++);
-		if (!(++i % line_size) || (length == 0 && i % line_size)) {
-			if (length == 0) {
-				while (i++ % line_size)
-					printf("__ ");
-			}
-			printf(" | ");	/* right close */
-			while (line < address) {
-				c = *line++;
-				printf("%c", (c < 33 || c == 255) ? 0x2E : c);
-			}
-			printf("\n");
-			if (length > 0)
-				printf("%s | ", buf);
-		}
-	}
-	printf("\n");
-}
-
-static void *memset32_htonl(void *dest, u32 val, u32 size)
-{
-	u32 *ptr = (u32 *)dest;
-	int i;
-
-	val = htonl(val);
-
-	for (i = 0; i < (size & (~0x3)); i += 4)
-		ptr[i >> 2] = val;
-
-	for (; i < size; i++)
-		((char *)dest)[i] = ((char *)&val)[i & 3];
-
-	return dest;
-}
-
-/*
- * This function code has been taken from
- * Linux kernel lib/checksum.c
- */
-static inline unsigned short from32to16(unsigned int x)
-{
-	/* add up 16-bit and 16-bit for 16+c bit */
-	x = (x & 0xffff) + (x >> 16);
-	/* add up carry.. */
-	x = (x & 0xffff) + (x >> 16);
-	return x;
-}
-
-/*
- * This function code has been taken from
- * Linux kernel lib/checksum.c
- */
-static unsigned int do_csum(const unsigned char *buff, int len)
-{
-	unsigned int result = 0;
-	int odd;
-
-	if (len <= 0)
-		goto out;
-	odd = 1 & (unsigned long)buff;
-	if (odd) {
-#ifdef __LITTLE_ENDIAN
-		result += (*buff << 8);
-#else
-		result = *buff;
-#endif
-		len--;
-		buff++;
-	}
-	if (len >= 2) {
-		if (2 & (unsigned long)buff) {
-			result += *(unsigned short *)buff;
-			len -= 2;
-			buff += 2;
-		}
-		if (len >= 4) {
-			const unsigned char *end = buff +
-						   ((unsigned int)len & ~3);
-			unsigned int carry = 0;
-
-			do {
-				unsigned int w = *(unsigned int *)buff;
-
-				buff += 4;
-				result += carry;
-				result += w;
-				carry = (w > result);
-			} while (buff < end);
-			result += carry;
-			result = (result & 0xffff) + (result >> 16);
-		}
-		if (len & 2) {
-			result += *(unsigned short *)buff;
-			buff += 2;
-		}
-	}
-	if (len & 1)
-#ifdef __LITTLE_ENDIAN
-		result += *buff;
-#else
-		result += (*buff << 8);
-#endif
-	result = from32to16(result);
-	if (odd)
-		result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
-out:
-	return result;
-}
-
-/*
- *	This is a version of ip_compute_csum() optimized for IP headers,
- *	which always checksum on 4 octet boundaries.
- *	This function code has been taken from
- *	Linux kernel lib/checksum.c
- */
-static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
-{
-	return (__sum16)~do_csum(iph, ihl * 4);
-}
-
-/*
- * Fold a partial checksum
- * This function code has been taken from
- * Linux kernel include/asm-generic/checksum.h
- */
-static inline __sum16 csum_fold(__wsum csum)
-{
-	u32 sum = (u32)csum;
-
-	sum = (sum & 0xffff) + (sum >> 16);
-	sum = (sum & 0xffff) + (sum >> 16);
-	return (__sum16)~sum;
-}
-
-/*
- * This function code has been taken from
- * Linux kernel lib/checksum.c
- */
-static inline u32 from64to32(u64 x)
-{
-	/* add up 32-bit and 32-bit for 32+c bit */
-	x = (x & 0xffffffff) + (x >> 32);
-	/* add up carry.. */
-	x = (x & 0xffffffff) + (x >> 32);
-	return (u32)x;
-}
-
-__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
-			  __u32 len, __u8 proto, __wsum sum);
-
-/*
- * This function code has been taken from
- * Linux kernel lib/checksum.c
- */
-__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
-			  __u32 len, __u8 proto, __wsum sum)
-{
-	unsigned long long s = (u32)sum;
-
-	s += (u32)saddr;
-	s += (u32)daddr;
-#ifdef __BIG_ENDIAN__
-	s += proto + len;
-#else
-	s += (proto + len) << 8;
-#endif
-	return (__wsum)from64to32(s);
-}
-
-/*
- * This function has been taken from
- * Linux kernel include/asm-generic/checksum.h
- */
-static inline __sum16
-csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len,
-		  __u8 proto, __wsum sum)
-{
-	return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
-}
-
-static inline u16 udp_csum(u32 saddr, u32 daddr, u32 len,
-			   u8 proto, u16 *udp_pkt)
-{
-	u32 csum = 0;
-	u32 cnt = 0;
-
-	/* udp hdr and data */
-	for (; cnt < len; cnt += 2)
-		csum += udp_pkt[cnt >> 1];
-
-	return csum_tcpudp_magic(saddr, daddr, len, proto, csum);
-}
-
-#define ETH_FCS_SIZE 4
-
-#define ETH_HDR_SIZE (opt_vlan_tag ? sizeof(struct vlan_ethhdr) : \
-		      sizeof(struct ethhdr))
-#define PKTGEN_HDR_SIZE (opt_tstamp ? sizeof(struct pktgen_hdr) : 0)
-#define PKT_HDR_SIZE (ETH_HDR_SIZE + sizeof(struct iphdr) + \
-		      sizeof(struct udphdr) + PKTGEN_HDR_SIZE)
-#define PKTGEN_HDR_OFFSET (ETH_HDR_SIZE + sizeof(struct iphdr) + \
-			   sizeof(struct udphdr))
-#define PKTGEN_SIZE_MIN (PKTGEN_HDR_OFFSET + sizeof(struct pktgen_hdr) + \
-			 ETH_FCS_SIZE)
-
-#define PKT_SIZE		(opt_pkt_size - ETH_FCS_SIZE)
-#define IP_PKT_SIZE		(PKT_SIZE - ETH_HDR_SIZE)
-#define UDP_PKT_SIZE		(IP_PKT_SIZE - sizeof(struct iphdr))
-#define UDP_PKT_DATA_SIZE	(UDP_PKT_SIZE - \
-				 (sizeof(struct udphdr) + PKTGEN_HDR_SIZE))
-
-static u8 pkt_data[XSK_UMEM__DEFAULT_FRAME_SIZE];
-
-static void gen_eth_hdr_data(void)
-{
-	struct pktgen_hdr *pktgen_hdr;
-	struct udphdr *udp_hdr;
-	struct iphdr *ip_hdr;
-
-	if (opt_vlan_tag) {
-		struct vlan_ethhdr *veth_hdr = (struct vlan_ethhdr *)pkt_data;
-		u16 vlan_tci = 0;
-
-		udp_hdr = (struct udphdr *)(pkt_data +
-					    sizeof(struct vlan_ethhdr) +
-					    sizeof(struct iphdr));
-		ip_hdr = (struct iphdr *)(pkt_data +
-					  sizeof(struct vlan_ethhdr));
-		pktgen_hdr = (struct pktgen_hdr *)(pkt_data +
-						   sizeof(struct vlan_ethhdr) +
-						   sizeof(struct iphdr) +
-						   sizeof(struct udphdr));
-		/* ethernet & VLAN header */
-		memcpy(veth_hdr->h_dest, &opt_txdmac, ETH_ALEN);
-		memcpy(veth_hdr->h_source, &opt_txsmac, ETH_ALEN);
-		veth_hdr->h_vlan_proto = htons(ETH_P_8021Q);
-		vlan_tci = opt_pkt_vlan_id & VLAN_VID_MASK;
-		vlan_tci |= (opt_pkt_vlan_pri << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK;
-		veth_hdr->h_vlan_TCI = htons(vlan_tci);
-		veth_hdr->h_vlan_encapsulated_proto = htons(ETH_P_IP);
-	} else {
-		struct ethhdr *eth_hdr = (struct ethhdr *)pkt_data;
-
-		udp_hdr = (struct udphdr *)(pkt_data +
-					    sizeof(struct ethhdr) +
-					    sizeof(struct iphdr));
-		ip_hdr = (struct iphdr *)(pkt_data +
-					  sizeof(struct ethhdr));
-		pktgen_hdr = (struct pktgen_hdr *)(pkt_data +
-						   sizeof(struct ethhdr) +
-						   sizeof(struct iphdr) +
-						   sizeof(struct udphdr));
-		/* ethernet header */
-		memcpy(eth_hdr->h_dest, &opt_txdmac, ETH_ALEN);
-		memcpy(eth_hdr->h_source, &opt_txsmac, ETH_ALEN);
-		eth_hdr->h_proto = htons(ETH_P_IP);
-	}
-
-
-	/* IP header */
-	ip_hdr->version = IPVERSION;
-	ip_hdr->ihl = 0x5; /* 20 byte header */
-	ip_hdr->tos = 0x0;
-	ip_hdr->tot_len = htons(IP_PKT_SIZE);
-	ip_hdr->id = 0;
-	ip_hdr->frag_off = 0;
-	ip_hdr->ttl = IPDEFTTL;
-	ip_hdr->protocol = IPPROTO_UDP;
-	ip_hdr->saddr = htonl(0x0a0a0a10);
-	ip_hdr->daddr = htonl(0x0a0a0a20);
-
-	/* IP header checksum */
-	ip_hdr->check = 0;
-	ip_hdr->check = ip_fast_csum((const void *)ip_hdr, ip_hdr->ihl);
-
-	/* UDP header */
-	udp_hdr->source = htons(0x1000);
-	udp_hdr->dest = htons(0x1000);
-	udp_hdr->len = htons(UDP_PKT_SIZE);
-
-	if (opt_tstamp)
-		pktgen_hdr->pgh_magic = htonl(PKTGEN_MAGIC);
-
-	/* UDP data */
-	memset32_htonl(pkt_data + PKT_HDR_SIZE, opt_pkt_fill_pattern,
-		       UDP_PKT_DATA_SIZE);
-
-	/* UDP header checksum */
-	udp_hdr->check = 0;
-	udp_hdr->check = udp_csum(ip_hdr->saddr, ip_hdr->daddr, UDP_PKT_SIZE,
-				  IPPROTO_UDP, (u16 *)udp_hdr);
-}
-
-static void gen_eth_frame(struct xsk_umem_info *umem, u64 addr)
-{
-	memcpy(xsk_umem__get_data(umem->buffer, addr), pkt_data,
-	       PKT_SIZE);
-}
-
-static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size)
-{
-	struct xsk_umem_info *umem;
-	struct xsk_umem_config cfg = {
-		/* We recommend that you set the fill ring size >= HW RX ring size +
-		 * AF_XDP RX ring size. Make sure you fill up the fill ring
-		 * with buffers at regular intervals, and you will with this setting
-		 * avoid allocation failures in the driver. These are usually quite
-		 * expensive since drivers have not been written to assume that
-		 * allocation failures are common. For regular sockets, kernel
-		 * allocated memory is used that only runs out in OOM situations
-		 * that should be rare.
-		 */
-		.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS * 2,
-		.comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
-		.frame_size = opt_xsk_frame_size,
-		.frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM,
-		.flags = opt_umem_flags
-	};
-	int ret;
-
-	umem = calloc(1, sizeof(*umem));
-	if (!umem)
-		exit_with_error(errno);
-
-	ret = xsk_umem__create(&umem->umem, buffer, size, &umem->fq, &umem->cq,
-			       &cfg);
-	if (ret)
-		exit_with_error(-ret);
-
-	umem->buffer = buffer;
-	return umem;
-}
-
-static void xsk_populate_fill_ring(struct xsk_umem_info *umem)
-{
-	int ret, i;
-	u32 idx;
-
-	ret = xsk_ring_prod__reserve(&umem->fq,
-				     XSK_RING_PROD__DEFAULT_NUM_DESCS * 2, &idx);
-	if (ret != XSK_RING_PROD__DEFAULT_NUM_DESCS * 2)
-		exit_with_error(-ret);
-	for (i = 0; i < XSK_RING_PROD__DEFAULT_NUM_DESCS * 2; i++)
-		*xsk_ring_prod__fill_addr(&umem->fq, idx++) =
-			i * opt_xsk_frame_size;
-	xsk_ring_prod__submit(&umem->fq, XSK_RING_PROD__DEFAULT_NUM_DESCS * 2);
-}
-
-static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem,
-						    bool rx, bool tx)
-{
-	struct xsk_socket_config cfg;
-	struct xsk_socket_info *xsk;
-	struct xsk_ring_cons *rxr;
-	struct xsk_ring_prod *txr;
-	int ret;
-
-	xsk = calloc(1, sizeof(*xsk));
-	if (!xsk)
-		exit_with_error(errno);
-
-	xsk->umem = umem;
-	cfg.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
-	cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
-	if (opt_num_xsks > 1 || opt_reduced_cap)
-		cfg.libbpf_flags = XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
-	else
-		cfg.libbpf_flags = 0;
-	cfg.xdp_flags = opt_xdp_flags;
-	cfg.bind_flags = opt_xdp_bind_flags;
-
-	rxr = rx ? &xsk->rx : NULL;
-	txr = tx ? &xsk->tx : NULL;
-	ret = xsk_socket__create(&xsk->xsk, opt_if, opt_queue, umem->umem,
-				 rxr, txr, &cfg);
-	if (ret)
-		exit_with_error(-ret);
-
-	ret = bpf_xdp_query_id(opt_ifindex, opt_xdp_flags, &prog_id);
-	if (ret)
-		exit_with_error(-ret);
-
-	xsk->app_stats.rx_empty_polls = 0;
-	xsk->app_stats.fill_fail_polls = 0;
-	xsk->app_stats.copy_tx_sendtos = 0;
-	xsk->app_stats.tx_wakeup_sendtos = 0;
-	xsk->app_stats.opt_polls = 0;
-	xsk->app_stats.prev_rx_empty_polls = 0;
-	xsk->app_stats.prev_fill_fail_polls = 0;
-	xsk->app_stats.prev_copy_tx_sendtos = 0;
-	xsk->app_stats.prev_tx_wakeup_sendtos = 0;
-	xsk->app_stats.prev_opt_polls = 0;
-
-	return xsk;
-}
-
-static struct option long_options[] = {
-	{"rxdrop", no_argument, 0, 'r'},
-	{"txonly", no_argument, 0, 't'},
-	{"l2fwd", no_argument, 0, 'l'},
-	{"interface", required_argument, 0, 'i'},
-	{"queue", required_argument, 0, 'q'},
-	{"poll", no_argument, 0, 'p'},
-	{"xdp-skb", no_argument, 0, 'S'},
-	{"xdp-native", no_argument, 0, 'N'},
-	{"interval", required_argument, 0, 'n'},
-	{"retries", required_argument, 0, 'O'},
-	{"zero-copy", no_argument, 0, 'z'},
-	{"copy", no_argument, 0, 'c'},
-	{"frame-size", required_argument, 0, 'f'},
-	{"no-need-wakeup", no_argument, 0, 'm'},
-	{"unaligned", no_argument, 0, 'u'},
-	{"shared-umem", no_argument, 0, 'M'},
-	{"force", no_argument, 0, 'F'},
-	{"duration", required_argument, 0, 'd'},
-	{"clock", required_argument, 0, 'w'},
-	{"batch-size", required_argument, 0, 'b'},
-	{"tx-pkt-count", required_argument, 0, 'C'},
-	{"tx-pkt-size", required_argument, 0, 's'},
-	{"tx-pkt-pattern", required_argument, 0, 'P'},
-	{"tx-vlan", no_argument, 0, 'V'},
-	{"tx-vlan-id", required_argument, 0, 'J'},
-	{"tx-vlan-pri", required_argument, 0, 'K'},
-	{"tx-dmac", required_argument, 0, 'G'},
-	{"tx-smac", required_argument, 0, 'H'},
-	{"tx-cycle", required_argument, 0, 'T'},
-	{"tstamp", no_argument, 0, 'y'},
-	{"policy", required_argument, 0, 'W'},
-	{"schpri", required_argument, 0, 'U'},
-	{"extra-stats", no_argument, 0, 'x'},
-	{"quiet", no_argument, 0, 'Q'},
-	{"app-stats", no_argument, 0, 'a'},
-	{"irq-string", no_argument, 0, 'I'},
-	{"busy-poll", no_argument, 0, 'B'},
-	{"reduce-cap", no_argument, 0, 'R'},
-	{0, 0, 0, 0}
-};
-
-static void usage(const char *prog)
-{
-	const char *str =
-		"  Usage: %s [OPTIONS]\n"
-		"  Options:\n"
-		"  -r, --rxdrop		Discard all incoming packets (default)\n"
-		"  -t, --txonly		Only send packets\n"
-		"  -l, --l2fwd		MAC swap L2 forwarding\n"
-		"  -i, --interface=n	Run on interface n\n"
-		"  -q, --queue=n	Use queue n (default 0)\n"
-		"  -p, --poll		Use poll syscall\n"
-		"  -S, --xdp-skb=n	Use XDP skb-mod\n"
-		"  -N, --xdp-native=n	Enforce XDP native mode\n"
-		"  -n, --interval=n	Specify statistics update interval (default 1 sec).\n"
-		"  -O, --retries=n	Specify time-out retries (1s interval) attempt (default 3).\n"
-		"  -z, --zero-copy      Force zero-copy mode.\n"
-		"  -c, --copy           Force copy mode.\n"
-		"  -m, --no-need-wakeup Turn off use of driver need wakeup flag.\n"
-		"  -f, --frame-size=n   Set the frame size (must be a power of two in aligned mode, default is %d).\n"
-		"  -u, --unaligned	Enable unaligned chunk placement\n"
-		"  -M, --shared-umem	Enable XDP_SHARED_UMEM (cannot be used with -R)\n"
-		"  -F, --force		Force loading the XDP prog\n"
-		"  -d, --duration=n	Duration in secs to run command.\n"
-		"			Default: forever.\n"
-		"  -w, --clock=CLOCK	Clock NAME (default MONOTONIC).\n"
-		"  -b, --batch-size=n	Batch size for sending or receiving\n"
-		"			packets. Default: %d\n"
-		"  -C, --tx-pkt-count=n	Number of packets to send.\n"
-		"			Default: Continuous packets.\n"
-		"  -s, --tx-pkt-size=n	Transmit packet size.\n"
-		"			(Default: %d bytes)\n"
-		"			Min size: %d, Max size %d.\n"
-		"  -P, --tx-pkt-pattern=nPacket fill pattern. Default: 0x%x\n"
-		"  -V, --tx-vlan        Send VLAN tagged  packets (For -t|--txonly)\n"
-		"  -J, --tx-vlan-id=n   Tx VLAN ID [1-4095]. Default: %d (For -V|--tx-vlan)\n"
-		"  -K, --tx-vlan-pri=n  Tx VLAN Priority [0-7]. Default: %d (For -V|--tx-vlan)\n"
-		"  -G, --tx-dmac=<MAC>  Dest MAC addr of TX frame in aa:bb:cc:dd:ee:ff format (For -V|--tx-vlan)\n"
-		"  -H, --tx-smac=<MAC>  Src MAC addr of TX frame in aa:bb:cc:dd:ee:ff format (For -V|--tx-vlan)\n"
-		"  -T, --tx-cycle=n     Tx cycle time in micro-seconds (For -t|--txonly).\n"
-		"  -y, --tstamp         Add time-stamp to packet (For -t|--txonly).\n"
-		"  -W, --policy=POLICY  Schedule policy. Default: SCHED_OTHER\n"
-		"  -U, --schpri=n       Schedule priority. Default: %d\n"
-		"  -x, --extra-stats	Display extra statistics.\n"
-		"  -Q, --quiet          Do not display any stats.\n"
-		"  -a, --app-stats	Display application (syscall) statistics.\n"
-		"  -I, --irq-string	Display driver interrupt statistics for interface associated with irq-string.\n"
-		"  -B, --busy-poll      Busy poll.\n"
-		"  -R, --reduce-cap	Use reduced capabilities (cannot be used with -M)\n"
-		"\n";
-	fprintf(stderr, str, prog, XSK_UMEM__DEFAULT_FRAME_SIZE,
-		opt_batch_size, MIN_PKT_SIZE, MIN_PKT_SIZE,
-		XSK_UMEM__DEFAULT_FRAME_SIZE, opt_pkt_fill_pattern,
-		VLAN_VID__DEFAULT, VLAN_PRI__DEFAULT,
-		SCHED_PRI__DEFAULT);
-
-	exit(EXIT_FAILURE);
-}
-
-static void parse_command_line(int argc, char **argv)
-{
-	int option_index, c;
-
-	opterr = 0;
-
-	for (;;) {
-		c = getopt_long(argc, argv,
-				"Frtli:q:pSNn:w:O:czf:muMd:b:C:s:P:VJ:K:G:H:T:yW:U:xQaI:BR",
-				long_options, &option_index);
-		if (c == -1)
-			break;
-
-		switch (c) {
-		case 'r':
-			opt_bench = BENCH_RXDROP;
-			break;
-		case 't':
-			opt_bench = BENCH_TXONLY;
-			break;
-		case 'l':
-			opt_bench = BENCH_L2FWD;
-			break;
-		case 'i':
-			opt_if = optarg;
-			break;
-		case 'q':
-			opt_queue = atoi(optarg);
-			break;
-		case 'p':
-			opt_poll = 1;
-			break;
-		case 'S':
-			opt_xdp_flags |= XDP_FLAGS_SKB_MODE;
-			opt_xdp_bind_flags |= XDP_COPY;
-			break;
-		case 'N':
-			/* default, set below */
-			break;
-		case 'n':
-			opt_interval = atoi(optarg);
-			break;
-		case 'w':
-			if (get_clockid(&opt_clock, optarg)) {
-				fprintf(stderr,
-					"ERROR: Invalid clock %s. Default to CLOCK_MONOTONIC.\n",
-					optarg);
-				opt_clock = CLOCK_MONOTONIC;
-			}
-			break;
-		case 'O':
-			opt_retries = atoi(optarg);
-			break;
-		case 'z':
-			opt_xdp_bind_flags |= XDP_ZEROCOPY;
-			break;
-		case 'c':
-			opt_xdp_bind_flags |= XDP_COPY;
-			break;
-		case 'u':
-			opt_umem_flags |= XDP_UMEM_UNALIGNED_CHUNK_FLAG;
-			opt_unaligned_chunks = 1;
-			opt_mmap_flags = MAP_HUGETLB;
-			break;
-		case 'F':
-			opt_xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
-			break;
-		case 'f':
-			opt_xsk_frame_size = atoi(optarg);
-			break;
-		case 'm':
-			opt_need_wakeup = false;
-			opt_xdp_bind_flags &= ~XDP_USE_NEED_WAKEUP;
-			break;
-		case 'M':
-			opt_num_xsks = MAX_SOCKS;
-			break;
-		case 'd':
-			opt_duration = atoi(optarg);
-			opt_duration *= 1000000000;
-			break;
-		case 'b':
-			opt_batch_size = atoi(optarg);
-			break;
-		case 'C':
-			opt_pkt_count = atoi(optarg);
-			break;
-		case 's':
-			opt_pkt_size = atoi(optarg);
-			if (opt_pkt_size > (XSK_UMEM__DEFAULT_FRAME_SIZE) ||
-			    opt_pkt_size < MIN_PKT_SIZE) {
-				fprintf(stderr,
-					"ERROR: Invalid frame size %d\n",
-					opt_pkt_size);
-				usage(basename(argv[0]));
-			}
-			break;
-		case 'P':
-			opt_pkt_fill_pattern = strtol(optarg, NULL, 16);
-			break;
-		case 'V':
-			opt_vlan_tag = true;
-			break;
-		case 'J':
-			opt_pkt_vlan_id = atoi(optarg);
-			break;
-		case 'K':
-			opt_pkt_vlan_pri = atoi(optarg);
-			break;
-		case 'G':
-			if (!ether_aton_r(optarg,
-					  (struct ether_addr *)&opt_txdmac)) {
-				fprintf(stderr, "Invalid dmac address:%s\n",
-					optarg);
-				usage(basename(argv[0]));
-			}
-			break;
-		case 'H':
-			if (!ether_aton_r(optarg,
-					  (struct ether_addr *)&opt_txsmac)) {
-				fprintf(stderr, "Invalid smac address:%s\n",
-					optarg);
-				usage(basename(argv[0]));
-			}
-			break;
-		case 'T':
-			opt_tx_cycle_ns = atoi(optarg);
-			opt_tx_cycle_ns *= NSEC_PER_USEC;
-			break;
-		case 'y':
-			opt_tstamp = 1;
-			break;
-		case 'W':
-			if (get_schpolicy(&opt_schpolicy, optarg)) {
-				fprintf(stderr,
-					"ERROR: Invalid policy %s. Default to SCHED_OTHER.\n",
-					optarg);
-				opt_schpolicy = SCHED_OTHER;
-			}
-			break;
-		case 'U':
-			opt_schprio = atoi(optarg);
-			break;
-		case 'x':
-			opt_extra_stats = 1;
-			break;
-		case 'Q':
-			opt_quiet = 1;
-			break;
-		case 'a':
-			opt_app_stats = 1;
-			break;
-		case 'I':
-			opt_irq_str = optarg;
-			if (get_interrupt_number())
-				irqs_at_init = get_irqs();
-			if (irqs_at_init < 0) {
-				fprintf(stderr, "ERROR: Failed to get irqs for %s\n", opt_irq_str);
-				usage(basename(argv[0]));
-			}
-			break;
-		case 'B':
-			opt_busy_poll = 1;
-			break;
-		case 'R':
-			opt_reduced_cap = true;
-			break;
-		default:
-			usage(basename(argv[0]));
-		}
-	}
-
-	if (!(opt_xdp_flags & XDP_FLAGS_SKB_MODE))
-		opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
-
-	opt_ifindex = if_nametoindex(opt_if);
-	if (!opt_ifindex) {
-		fprintf(stderr, "ERROR: interface \"%s\" does not exist\n",
-			opt_if);
-		usage(basename(argv[0]));
-	}
-
-	if ((opt_xsk_frame_size & (opt_xsk_frame_size - 1)) &&
-	    !opt_unaligned_chunks) {
-		fprintf(stderr, "--frame-size=%d is not a power of two\n",
-			opt_xsk_frame_size);
-		usage(basename(argv[0]));
-	}
-
-	if (opt_reduced_cap && opt_num_xsks > 1) {
-		fprintf(stderr, "ERROR: -M and -R cannot be used together\n");
-		usage(basename(argv[0]));
-	}
-}
-
-static void kick_tx(struct xsk_socket_info *xsk)
-{
-	int ret;
-
-	ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
-	if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN ||
-	    errno == EBUSY || errno == ENETDOWN)
-		return;
-	exit_with_error(errno);
-}
-
-static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk)
-{
-	struct xsk_umem_info *umem = xsk->umem;
-	u32 idx_cq = 0, idx_fq = 0;
-	unsigned int rcvd;
-	size_t ndescs;
-
-	if (!xsk->outstanding_tx)
-		return;
-
-	/* In copy mode, Tx is driven by a syscall so we need to use e.g. sendto() to
-	 * really send the packets. In zero-copy mode we do not have to do this, since Tx
-	 * is driven by the NAPI loop. So as an optimization, we do not have to call
-	 * sendto() all the time in zero-copy mode for l2fwd.
-	 */
-	if (opt_xdp_bind_flags & XDP_COPY) {
-		xsk->app_stats.copy_tx_sendtos++;
-		kick_tx(xsk);
-	}
-
-	ndescs = (xsk->outstanding_tx > opt_batch_size) ? opt_batch_size :
-		xsk->outstanding_tx;
-
-	/* re-add completed Tx buffers */
-	rcvd = xsk_ring_cons__peek(&umem->cq, ndescs, &idx_cq);
-	if (rcvd > 0) {
-		unsigned int i;
-		int ret;
-
-		ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
-		while (ret != rcvd) {
-			if (ret < 0)
-				exit_with_error(-ret);
-			if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&umem->fq)) {
-				xsk->app_stats.fill_fail_polls++;
-				recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL,
-					 NULL);
-			}
-			ret = xsk_ring_prod__reserve(&umem->fq, rcvd, &idx_fq);
-		}
-
-		for (i = 0; i < rcvd; i++)
-			*xsk_ring_prod__fill_addr(&umem->fq, idx_fq++) =
-				*xsk_ring_cons__comp_addr(&umem->cq, idx_cq++);
-
-		xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
-		xsk_ring_cons__release(&xsk->umem->cq, rcvd);
-		xsk->outstanding_tx -= rcvd;
-	}
-}
-
-static inline void complete_tx_only(struct xsk_socket_info *xsk,
-				    int batch_size)
-{
-	unsigned int rcvd;
-	u32 idx;
-
-	if (!xsk->outstanding_tx)
-		return;
-
-	if (!opt_need_wakeup || xsk_ring_prod__needs_wakeup(&xsk->tx)) {
-		xsk->app_stats.tx_wakeup_sendtos++;
-		kick_tx(xsk);
-	}
-
-	rcvd = xsk_ring_cons__peek(&xsk->umem->cq, batch_size, &idx);
-	if (rcvd > 0) {
-		xsk_ring_cons__release(&xsk->umem->cq, rcvd);
-		xsk->outstanding_tx -= rcvd;
-	}
-}
-
-static void rx_drop(struct xsk_socket_info *xsk)
-{
-	unsigned int rcvd, i;
-	u32 idx_rx = 0, idx_fq = 0;
-	int ret;
-
-	rcvd = xsk_ring_cons__peek(&xsk->rx, opt_batch_size, &idx_rx);
-	if (!rcvd) {
-		if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) {
-			xsk->app_stats.rx_empty_polls++;
-			recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL);
-		}
-		return;
-	}
-
-	ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
-	while (ret != rcvd) {
-		if (ret < 0)
-			exit_with_error(-ret);
-		if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) {
-			xsk->app_stats.fill_fail_polls++;
-			recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL);
-		}
-		ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
-	}
-
-	for (i = 0; i < rcvd; i++) {
-		u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr;
-		u32 len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++)->len;
-		u64 orig = xsk_umem__extract_addr(addr);
-
-		addr = xsk_umem__add_offset_to_addr(addr);
-		char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr);
-
-		hex_dump(pkt, len, addr);
-		*xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) = orig;
-	}
-
-	xsk_ring_prod__submit(&xsk->umem->fq, rcvd);
-	xsk_ring_cons__release(&xsk->rx, rcvd);
-	xsk->ring_stats.rx_npkts += rcvd;
-}
-
-static void rx_drop_all(void)
-{
-	struct pollfd fds[MAX_SOCKS] = {};
-	int i, ret;
-
-	for (i = 0; i < num_socks; i++) {
-		fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
-		fds[i].events = POLLIN;
-	}
-
-	for (;;) {
-		if (opt_poll) {
-			for (i = 0; i < num_socks; i++)
-				xsks[i]->app_stats.opt_polls++;
-			ret = poll(fds, num_socks, opt_timeout);
-			if (ret <= 0)
-				continue;
-		}
-
-		for (i = 0; i < num_socks; i++)
-			rx_drop(xsks[i]);
-
-		if (benchmark_done)
-			break;
-	}
-}
-
-static int tx_only(struct xsk_socket_info *xsk, u32 *frame_nb,
-		   int batch_size, unsigned long tx_ns)
-{
-	u32 idx, tv_sec, tv_usec;
-	unsigned int i;
-
-	while (xsk_ring_prod__reserve(&xsk->tx, batch_size, &idx) <
-				      batch_size) {
-		complete_tx_only(xsk, batch_size);
-		if (benchmark_done)
-			return 0;
-	}
-
-	if (opt_tstamp) {
-		tv_sec = (u32)(tx_ns / NSEC_PER_SEC);
-		tv_usec = (u32)((tx_ns % NSEC_PER_SEC) / 1000);
-	}
-
-	for (i = 0; i < batch_size; i++) {
-		struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx,
-								  idx + i);
-		tx_desc->addr = (*frame_nb + i) * opt_xsk_frame_size;
-		tx_desc->len = PKT_SIZE;
-
-		if (opt_tstamp) {
-			struct pktgen_hdr *pktgen_hdr;
-			u64 addr = tx_desc->addr;
-			char *pkt;
-
-			pkt = xsk_umem__get_data(xsk->umem->buffer, addr);
-			pktgen_hdr = (struct pktgen_hdr *)(pkt + PKTGEN_HDR_OFFSET);
-
-			pktgen_hdr->seq_num = htonl(sequence++);
-			pktgen_hdr->tv_sec = htonl(tv_sec);
-			pktgen_hdr->tv_usec = htonl(tv_usec);
-
-			hex_dump(pkt, PKT_SIZE, addr);
-		}
-	}
-
-	xsk_ring_prod__submit(&xsk->tx, batch_size);
-	xsk->ring_stats.tx_npkts += batch_size;
-	xsk->outstanding_tx += batch_size;
-	*frame_nb += batch_size;
-	*frame_nb %= NUM_FRAMES;
-	complete_tx_only(xsk, batch_size);
-
-	return batch_size;
-}
-
-static inline int get_batch_size(int pkt_cnt)
-{
-	if (!opt_pkt_count)
-		return opt_batch_size;
-
-	if (pkt_cnt + opt_batch_size <= opt_pkt_count)
-		return opt_batch_size;
-
-	return opt_pkt_count - pkt_cnt;
-}
-
-static void complete_tx_only_all(void)
-{
-	bool pending;
-	int i;
-
-	do {
-		pending = false;
-		for (i = 0; i < num_socks; i++) {
-			if (xsks[i]->outstanding_tx) {
-				complete_tx_only(xsks[i], opt_batch_size);
-				pending = !!xsks[i]->outstanding_tx;
-			}
-		}
-		sleep(1);
-	} while (pending && opt_retries-- > 0);
-}
-
-static void tx_only_all(void)
-{
-	struct pollfd fds[MAX_SOCKS] = {};
-	u32 frame_nb[MAX_SOCKS] = {};
-	unsigned long next_tx_ns = 0;
-	int pkt_cnt = 0;
-	int i, ret;
-
-	if (opt_poll && opt_tx_cycle_ns) {
-		fprintf(stderr,
-			"Error: --poll and --tx-cycles are both set\n");
-		return;
-	}
-
-	for (i = 0; i < num_socks; i++) {
-		fds[0].fd = xsk_socket__fd(xsks[i]->xsk);
-		fds[0].events = POLLOUT;
-	}
-
-	if (opt_tx_cycle_ns) {
-		/* Align Tx time to micro-second boundary */
-		next_tx_ns = (get_nsecs() / NSEC_PER_USEC + 1) *
-			     NSEC_PER_USEC;
-		next_tx_ns += opt_tx_cycle_ns;
-
-		/* Initialize periodic Tx scheduling variance */
-		tx_cycle_diff_min = 1000000000;
-		tx_cycle_diff_max = 0;
-		tx_cycle_diff_ave = 0.0;
-	}
-
-	while ((opt_pkt_count && pkt_cnt < opt_pkt_count) || !opt_pkt_count) {
-		int batch_size = get_batch_size(pkt_cnt);
-		unsigned long tx_ns = 0;
-		struct timespec next;
-		int tx_cnt = 0;
-		long diff;
-		int err;
-
-		if (opt_poll) {
-			for (i = 0; i < num_socks; i++)
-				xsks[i]->app_stats.opt_polls++;
-			ret = poll(fds, num_socks, opt_timeout);
-			if (ret <= 0)
-				continue;
-
-			if (!(fds[0].revents & POLLOUT))
-				continue;
-		}
-
-		if (opt_tx_cycle_ns) {
-			next.tv_sec = next_tx_ns / NSEC_PER_SEC;
-			next.tv_nsec = next_tx_ns % NSEC_PER_SEC;
-			err = clock_nanosleep(opt_clock, TIMER_ABSTIME, &next, NULL);
-			if (err) {
-				if (err != EINTR)
-					fprintf(stderr,
-						"clock_nanosleep failed. Err:%d errno:%d\n",
-						err, errno);
-				break;
-			}
-
-			/* Measure periodic Tx scheduling variance */
-			tx_ns = get_nsecs();
-			diff = tx_ns - next_tx_ns;
-			if (diff < tx_cycle_diff_min)
-				tx_cycle_diff_min = diff;
-
-			if (diff > tx_cycle_diff_max)
-				tx_cycle_diff_max = diff;
-
-			tx_cycle_diff_ave += (double)diff;
-			tx_cycle_cnt++;
-		} else if (opt_tstamp) {
-			tx_ns = get_nsecs();
-		}
-
-		for (i = 0; i < num_socks; i++)
-			tx_cnt += tx_only(xsks[i], &frame_nb[i], batch_size, tx_ns);
-
-		pkt_cnt += tx_cnt;
-
-		if (benchmark_done)
-			break;
-
-		if (opt_tx_cycle_ns)
-			next_tx_ns += opt_tx_cycle_ns;
-	}
-
-	if (opt_pkt_count)
-		complete_tx_only_all();
-}
-
-static void l2fwd(struct xsk_socket_info *xsk)
-{
-	unsigned int rcvd, i;
-	u32 idx_rx = 0, idx_tx = 0;
-	int ret;
-
-	complete_tx_l2fwd(xsk);
-
-	rcvd = xsk_ring_cons__peek(&xsk->rx, opt_batch_size, &idx_rx);
-	if (!rcvd) {
-		if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&xsk->umem->fq)) {
-			xsk->app_stats.rx_empty_polls++;
-			recvfrom(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, NULL);
-		}
-		return;
-	}
-	xsk->ring_stats.rx_npkts += rcvd;
-
-	ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
-	while (ret != rcvd) {
-		if (ret < 0)
-			exit_with_error(-ret);
-		complete_tx_l2fwd(xsk);
-		if (opt_busy_poll || xsk_ring_prod__needs_wakeup(&xsk->tx)) {
-			xsk->app_stats.tx_wakeup_sendtos++;
-			kick_tx(xsk);
-		}
-		ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
-	}
-
-	for (i = 0; i < rcvd; i++) {
-		u64 addr = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx)->addr;
-		u32 len = xsk_ring_cons__rx_desc(&xsk->rx, idx_rx++)->len;
-		u64 orig = addr;
-
-		addr = xsk_umem__add_offset_to_addr(addr);
-		char *pkt = xsk_umem__get_data(xsk->umem->buffer, addr);
-
-		swap_mac_addresses(pkt);
-
-		hex_dump(pkt, len, addr);
-		xsk_ring_prod__tx_desc(&xsk->tx, idx_tx)->addr = orig;
-		xsk_ring_prod__tx_desc(&xsk->tx, idx_tx++)->len = len;
-	}
-
-	xsk_ring_prod__submit(&xsk->tx, rcvd);
-	xsk_ring_cons__release(&xsk->rx, rcvd);
-
-	xsk->ring_stats.tx_npkts += rcvd;
-	xsk->outstanding_tx += rcvd;
-}
-
-static void l2fwd_all(void)
-{
-	struct pollfd fds[MAX_SOCKS] = {};
-	int i, ret;
-
-	for (;;) {
-		if (opt_poll) {
-			for (i = 0; i < num_socks; i++) {
-				fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
-				fds[i].events = POLLOUT | POLLIN;
-				xsks[i]->app_stats.opt_polls++;
-			}
-			ret = poll(fds, num_socks, opt_timeout);
-			if (ret <= 0)
-				continue;
-		}
-
-		for (i = 0; i < num_socks; i++)
-			l2fwd(xsks[i]);
-
-		if (benchmark_done)
-			break;
-	}
-}
-
-static void load_xdp_program(char **argv, struct bpf_object **obj)
-{
-	struct bpf_prog_load_attr prog_load_attr = {
-		.prog_type      = BPF_PROG_TYPE_XDP,
-	};
-	char xdp_filename[256];
-	int prog_fd;
-
-	snprintf(xdp_filename, sizeof(xdp_filename), "%s_kern.o", argv[0]);
-	prog_load_attr.file = xdp_filename;
-
-	if (bpf_prog_load_xattr(&prog_load_attr, obj, &prog_fd))
-		exit(EXIT_FAILURE);
-	if (prog_fd < 0) {
-		fprintf(stderr, "ERROR: no program found: %s\n",
-			strerror(prog_fd));
-		exit(EXIT_FAILURE);
-	}
-
-	if (bpf_xdp_attach(opt_ifindex, prog_fd, opt_xdp_flags, NULL) < 0) {
-		fprintf(stderr, "ERROR: link set xdp fd failed\n");
-		exit(EXIT_FAILURE);
-	}
-}
-
-static void enter_xsks_into_map(struct bpf_object *obj)
-{
-	struct bpf_map *map;
-	int i, xsks_map;
-
-	map = bpf_object__find_map_by_name(obj, "xsks_map");
-	xsks_map = bpf_map__fd(map);
-	if (xsks_map < 0) {
-		fprintf(stderr, "ERROR: no xsks map found: %s\n",
-			strerror(xsks_map));
-			exit(EXIT_FAILURE);
-	}
-
-	for (i = 0; i < num_socks; i++) {
-		int fd = xsk_socket__fd(xsks[i]->xsk);
-		int key, ret;
-
-		key = i;
-		ret = bpf_map_update_elem(xsks_map, &key, &fd, 0);
-		if (ret) {
-			fprintf(stderr, "ERROR: bpf_map_update_elem %d\n", i);
-			exit(EXIT_FAILURE);
-		}
-	}
-}
-
-static void apply_setsockopt(struct xsk_socket_info *xsk)
-{
-	int sock_opt;
-
-	if (!opt_busy_poll)
-		return;
-
-	sock_opt = 1;
-	if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_PREFER_BUSY_POLL,
-		       (void *)&sock_opt, sizeof(sock_opt)) < 0)
-		exit_with_error(errno);
-
-	sock_opt = 20;
-	if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL,
-		       (void *)&sock_opt, sizeof(sock_opt)) < 0)
-		exit_with_error(errno);
-
-	sock_opt = opt_batch_size;
-	if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL_BUDGET,
-		       (void *)&sock_opt, sizeof(sock_opt)) < 0)
-		exit_with_error(errno);
-}
-
-static int recv_xsks_map_fd_from_ctrl_node(int sock, int *_fd)
-{
-	char cms[CMSG_SPACE(sizeof(int))];
-	struct cmsghdr *cmsg;
-	struct msghdr msg;
-	struct iovec iov;
-	int value;
-	int len;
-
-	iov.iov_base = &value;
-	iov.iov_len = sizeof(int);
-
-	msg.msg_name = 0;
-	msg.msg_namelen = 0;
-	msg.msg_iov = &iov;
-	msg.msg_iovlen = 1;
-	msg.msg_flags = 0;
-	msg.msg_control = (caddr_t)cms;
-	msg.msg_controllen = sizeof(cms);
-
-	len = recvmsg(sock, &msg, 0);
-
-	if (len < 0) {
-		fprintf(stderr, "Recvmsg failed length incorrect.\n");
-		return -EINVAL;
-	}
-
-	if (len == 0) {
-		fprintf(stderr, "Recvmsg failed no data\n");
-		return -EINVAL;
-	}
-
-	cmsg = CMSG_FIRSTHDR(&msg);
-	*_fd = *(int *)CMSG_DATA(cmsg);
-
-	return 0;
-}
-
-static int
-recv_xsks_map_fd(int *xsks_map_fd)
-{
-	struct sockaddr_un server;
-	int err;
-
-	sock = socket(AF_UNIX, SOCK_STREAM, 0);
-	if (sock < 0) {
-		fprintf(stderr, "Error opening socket stream: %s", strerror(errno));
-		return errno;
-	}
-
-	server.sun_family = AF_UNIX;
-	strcpy(server.sun_path, SOCKET_NAME);
-
-	if (connect(sock, (struct sockaddr *)&server, sizeof(struct sockaddr_un)) < 0) {
-		close(sock);
-		fprintf(stderr, "Error connecting stream socket: %s", strerror(errno));
-		return errno;
-	}
-
-	err = recv_xsks_map_fd_from_ctrl_node(sock, xsks_map_fd);
-	if (err) {
-		fprintf(stderr, "Error %d receiving fd\n", err);
-		return err;
-	}
-	return 0;
-}
-
-int main(int argc, char **argv)
-{
-	struct __user_cap_header_struct hdr = { _LINUX_CAPABILITY_VERSION_3, 0 };
-	struct __user_cap_data_struct data[2] = { { 0 } };
-	bool rx = false, tx = false;
-	struct sched_param schparam;
-	struct xsk_umem_info *umem;
-	struct bpf_object *obj;
-	int xsks_map_fd = 0;
-	pthread_t pt;
-	int i, ret;
-	void *bufs;
-
-	parse_command_line(argc, argv);
-
-	if (opt_reduced_cap) {
-		if (capget(&hdr, data)  < 0)
-			fprintf(stderr, "Error getting capabilities\n");
-
-		data->effective &= CAP_TO_MASK(CAP_NET_RAW);
-		data->permitted &= CAP_TO_MASK(CAP_NET_RAW);
-
-		if (capset(&hdr, data) < 0)
-			fprintf(stderr, "Setting capabilities failed\n");
-
-		if (capget(&hdr, data)  < 0) {
-			fprintf(stderr, "Error getting capabilities\n");
-		} else {
-			fprintf(stderr, "Capabilities EFF %x Caps INH %x Caps Per %x\n",
-				data[0].effective, data[0].inheritable, data[0].permitted);
-			fprintf(stderr, "Capabilities EFF %x Caps INH %x Caps Per %x\n",
-				data[1].effective, data[1].inheritable, data[1].permitted);
-		}
-	} else {
-		/* Use libbpf 1.0 API mode */
-		libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
-
-		if (opt_num_xsks > 1)
-			load_xdp_program(argv, &obj);
-	}
-
-	/* Reserve memory for the umem. Use hugepages if unaligned chunk mode */
-	bufs = mmap(NULL, NUM_FRAMES * opt_xsk_frame_size,
-		    PROT_READ | PROT_WRITE,
-		    MAP_PRIVATE | MAP_ANONYMOUS | opt_mmap_flags, -1, 0);
-	if (bufs == MAP_FAILED) {
-		printf("ERROR: mmap failed\n");
-		exit(EXIT_FAILURE);
-	}
-
-	/* Create sockets... */
-	umem = xsk_configure_umem(bufs, NUM_FRAMES * opt_xsk_frame_size);
-	if (opt_bench == BENCH_RXDROP || opt_bench == BENCH_L2FWD) {
-		rx = true;
-		xsk_populate_fill_ring(umem);
-	}
-	if (opt_bench == BENCH_L2FWD || opt_bench == BENCH_TXONLY)
-		tx = true;
-	for (i = 0; i < opt_num_xsks; i++)
-		xsks[num_socks++] = xsk_configure_socket(umem, rx, tx);
-
-	for (i = 0; i < opt_num_xsks; i++)
-		apply_setsockopt(xsks[i]);
-
-	if (opt_bench == BENCH_TXONLY) {
-		if (opt_tstamp && opt_pkt_size < PKTGEN_SIZE_MIN)
-			opt_pkt_size = PKTGEN_SIZE_MIN;
-
-		gen_eth_hdr_data();
-
-		for (i = 0; i < NUM_FRAMES; i++)
-			gen_eth_frame(umem, i * opt_xsk_frame_size);
-	}
-
-	if (opt_num_xsks > 1 && opt_bench != BENCH_TXONLY)
-		enter_xsks_into_map(obj);
-
-	if (opt_reduced_cap) {
-		ret = recv_xsks_map_fd(&xsks_map_fd);
-		if (ret) {
-			fprintf(stderr, "Error %d receiving xsks_map_fd\n", ret);
-			exit_with_error(ret);
-		}
-		if (xsks[0]->xsk) {
-			ret = xsk_socket__update_xskmap(xsks[0]->xsk, xsks_map_fd);
-			if (ret) {
-				fprintf(stderr, "Update of BPF map failed(%d)\n", ret);
-				exit_with_error(ret);
-			}
-		}
-	}
-
-	signal(SIGINT, int_exit);
-	signal(SIGTERM, int_exit);
-	signal(SIGABRT, int_exit);
-
-	setlocale(LC_ALL, "");
-
-	prev_time = get_nsecs();
-	start_time = prev_time;
-
-	if (!opt_quiet) {
-		ret = pthread_create(&pt, NULL, poller, NULL);
-		if (ret)
-			exit_with_error(ret);
-	}
-
-	/* Configure sched priority for better wake-up accuracy */
-	memset(&schparam, 0, sizeof(schparam));
-	schparam.sched_priority = opt_schprio;
-	ret = sched_setscheduler(0, opt_schpolicy, &schparam);
-	if (ret) {
-		fprintf(stderr, "Error(%d) in setting priority(%d): %s\n",
-			errno, opt_schprio, strerror(errno));
-		goto out;
-	}
-
-	if (opt_bench == BENCH_RXDROP)
-		rx_drop_all();
-	else if (opt_bench == BENCH_TXONLY)
-		tx_only_all();
-	else
-		l2fwd_all();
-
-out:
-	benchmark_done = true;
-
-	if (!opt_quiet)
-		pthread_join(pt, NULL);
-
-	xdpsock_cleanup();
-
-	munmap(bufs, NUM_FRAMES * opt_xsk_frame_size);
-
-	return 0;
-}
diff --git a/samples/bpf/xsk_fwd.c b/samples/bpf/xsk_fwd.c
deleted file mode 100644
index 2324e18ccc7e..000000000000
--- a/samples/bpf/xsk_fwd.c
+++ /dev/null
@@ -1,1085 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* Copyright(c) 2020 Intel Corporation. */
-
-#define _GNU_SOURCE
-#include <poll.h>
-#include <pthread.h>
-#include <signal.h>
-#include <sched.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/socket.h>
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
-#include <getopt.h>
-#include <netinet/ether.h>
-#include <net/if.h>
-
-#include <linux/bpf.h>
-#include <linux/if_link.h>
-#include <linux/if_xdp.h>
-
-#include <bpf/libbpf.h>
-#include <bpf/xsk.h>
-#include <bpf/bpf.h>
-
-/* libbpf APIs for AF_XDP are deprecated starting from v0.7 */
-#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
-
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
-
-typedef __u64 u64;
-typedef __u32 u32;
-typedef __u16 u16;
-typedef __u8  u8;
-
-/* This program illustrates the packet forwarding between multiple AF_XDP
- * sockets in multi-threaded environment. All threads are sharing a common
- * buffer pool, with each socket having its own private buffer cache.
- *
- * Example 1: Single thread handling two sockets. The packets received by socket
- * A (interface IFA, queue QA) are forwarded to socket B (interface IFB, queue
- * QB), while the packets received by socket B are forwarded to socket A. The
- * thread is running on CPU core X:
- *
- *         ./xsk_fwd -i IFA -q QA -i IFB -q QB -c X
- *
- * Example 2: Two threads, each handling two sockets. The thread running on CPU
- * core X forwards all the packets received by socket A to socket B, and all the
- * packets received by socket B to socket A. The thread running on CPU core Y is
- * performing the same packet forwarding between sockets C and D:
- *
- *         ./xsk_fwd -i IFA -q QA -i IFB -q QB -i IFC -q QC -i IFD -q QD
- *         -c CX -c CY
- */
-
-/*
- * Buffer pool and buffer cache
- *
- * For packet forwarding, the packet buffers are typically allocated from the
- * pool for packet reception and freed back to the pool for further reuse once
- * the packet transmission is completed.
- *
- * The buffer pool is shared between multiple threads. In order to minimize the
- * access latency to the shared buffer pool, each thread creates one (or
- * several) buffer caches, which, unlike the buffer pool, are private to the
- * thread that creates them and therefore cannot be shared with other threads.
- * The access to the shared pool is only needed either (A) when the cache gets
- * empty due to repeated buffer allocations and it needs to be replenished from
- * the pool, or (B) when the cache gets full due to repeated buffer free and it
- * needs to be flushed back to the pull.
- *
- * In a packet forwarding system, a packet received on any input port can
- * potentially be transmitted on any output port, depending on the forwarding
- * configuration. For AF_XDP sockets, for this to work with zero-copy of the
- * packet buffers when, it is required that the buffer pool memory fits into the
- * UMEM area shared by all the sockets.
- */
-
-struct bpool_params {
-	u32 n_buffers;
-	u32 buffer_size;
-	int mmap_flags;
-
-	u32 n_users_max;
-	u32 n_buffers_per_slab;
-};
-
-/* This buffer pool implementation organizes the buffers into equally sized
- * slabs of *n_buffers_per_slab*. Initially, there are *n_slabs* slabs in the
- * pool that are completely filled with buffer pointers (full slabs).
- *
- * Each buffer cache has a slab for buffer allocation and a slab for buffer
- * free, with both of these slabs initially empty. When the cache's allocation
- * slab goes empty, it is swapped with one of the available full slabs from the
- * pool, if any is available. When the cache's free slab goes full, it is
- * swapped for one of the empty slabs from the pool, which is guaranteed to
- * succeed.
- *
- * Partially filled slabs never get traded between the cache and the pool
- * (except when the cache itself is destroyed), which enables fast operation
- * through pointer swapping.
- */
-struct bpool {
-	struct bpool_params params;
-	pthread_mutex_t lock;
-	void *addr;
-
-	u64 **slabs;
-	u64 **slabs_reserved;
-	u64 *buffers;
-	u64 *buffers_reserved;
-
-	u64 n_slabs;
-	u64 n_slabs_reserved;
-	u64 n_buffers;
-
-	u64 n_slabs_available;
-	u64 n_slabs_reserved_available;
-
-	struct xsk_umem_config umem_cfg;
-	struct xsk_ring_prod umem_fq;
-	struct xsk_ring_cons umem_cq;
-	struct xsk_umem *umem;
-};
-
-static struct bpool *
-bpool_init(struct bpool_params *params,
-	   struct xsk_umem_config *umem_cfg)
-{
-	u64 n_slabs, n_slabs_reserved, n_buffers, n_buffers_reserved;
-	u64 slabs_size, slabs_reserved_size;
-	u64 buffers_size, buffers_reserved_size;
-	u64 total_size, i;
-	struct bpool *bp;
-	u8 *p;
-	int status;
-
-	/* Use libbpf 1.0 API mode */
-	libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
-
-	/* bpool internals dimensioning. */
-	n_slabs = (params->n_buffers + params->n_buffers_per_slab - 1) /
-		params->n_buffers_per_slab;
-	n_slabs_reserved = params->n_users_max * 2;
-	n_buffers = n_slabs * params->n_buffers_per_slab;
-	n_buffers_reserved = n_slabs_reserved * params->n_buffers_per_slab;
-
-	slabs_size = n_slabs * sizeof(u64 *);
-	slabs_reserved_size = n_slabs_reserved * sizeof(u64 *);
-	buffers_size = n_buffers * sizeof(u64);
-	buffers_reserved_size = n_buffers_reserved * sizeof(u64);
-
-	total_size = sizeof(struct bpool) +
-		slabs_size + slabs_reserved_size +
-		buffers_size + buffers_reserved_size;
-
-	/* bpool memory allocation. */
-	p = calloc(total_size, sizeof(u8));
-	if (!p)
-		return NULL;
-
-	/* bpool memory initialization. */
-	bp = (struct bpool *)p;
-	memcpy(&bp->params, params, sizeof(*params));
-	bp->params.n_buffers = n_buffers;
-
-	bp->slabs = (u64 **)&p[sizeof(struct bpool)];
-	bp->slabs_reserved = (u64 **)&p[sizeof(struct bpool) +
-		slabs_size];
-	bp->buffers = (u64 *)&p[sizeof(struct bpool) +
-		slabs_size + slabs_reserved_size];
-	bp->buffers_reserved = (u64 *)&p[sizeof(struct bpool) +
-		slabs_size + slabs_reserved_size + buffers_size];
-
-	bp->n_slabs = n_slabs;
-	bp->n_slabs_reserved = n_slabs_reserved;
-	bp->n_buffers = n_buffers;
-
-	for (i = 0; i < n_slabs; i++)
-		bp->slabs[i] = &bp->buffers[i * params->n_buffers_per_slab];
-	bp->n_slabs_available = n_slabs;
-
-	for (i = 0; i < n_slabs_reserved; i++)
-		bp->slabs_reserved[i] = &bp->buffers_reserved[i *
-			params->n_buffers_per_slab];
-	bp->n_slabs_reserved_available = n_slabs_reserved;
-
-	for (i = 0; i < n_buffers; i++)
-		bp->buffers[i] = i * params->buffer_size;
-
-	/* lock. */
-	status = pthread_mutex_init(&bp->lock, NULL);
-	if (status) {
-		free(p);
-		return NULL;
-	}
-
-	/* mmap. */
-	bp->addr = mmap(NULL,
-			n_buffers * params->buffer_size,
-			PROT_READ | PROT_WRITE,
-			MAP_PRIVATE | MAP_ANONYMOUS | params->mmap_flags,
-			-1,
-			0);
-	if (bp->addr == MAP_FAILED) {
-		pthread_mutex_destroy(&bp->lock);
-		free(p);
-		return NULL;
-	}
-
-	/* umem. */
-	status = xsk_umem__create(&bp->umem,
-				  bp->addr,
-				  bp->params.n_buffers * bp->params.buffer_size,
-				  &bp->umem_fq,
-				  &bp->umem_cq,
-				  umem_cfg);
-	if (status) {
-		munmap(bp->addr, bp->params.n_buffers * bp->params.buffer_size);
-		pthread_mutex_destroy(&bp->lock);
-		free(p);
-		return NULL;
-	}
-	memcpy(&bp->umem_cfg, umem_cfg, sizeof(*umem_cfg));
-
-	return bp;
-}
-
-static void
-bpool_free(struct bpool *bp)
-{
-	if (!bp)
-		return;
-
-	xsk_umem__delete(bp->umem);
-	munmap(bp->addr, bp->params.n_buffers * bp->params.buffer_size);
-	pthread_mutex_destroy(&bp->lock);
-	free(bp);
-}
-
-struct bcache {
-	struct bpool *bp;
-
-	u64 *slab_cons;
-	u64 *slab_prod;
-
-	u64 n_buffers_cons;
-	u64 n_buffers_prod;
-};
-
-static u32
-bcache_slab_size(struct bcache *bc)
-{
-	struct bpool *bp = bc->bp;
-
-	return bp->params.n_buffers_per_slab;
-}
-
-static struct bcache *
-bcache_init(struct bpool *bp)
-{
-	struct bcache *bc;
-
-	bc = calloc(1, sizeof(struct bcache));
-	if (!bc)
-		return NULL;
-
-	bc->bp = bp;
-	bc->n_buffers_cons = 0;
-	bc->n_buffers_prod = 0;
-
-	pthread_mutex_lock(&bp->lock);
-	if (bp->n_slabs_reserved_available == 0) {
-		pthread_mutex_unlock(&bp->lock);
-		free(bc);
-		return NULL;
-	}
-
-	bc->slab_cons = bp->slabs_reserved[bp->n_slabs_reserved_available - 1];
-	bc->slab_prod = bp->slabs_reserved[bp->n_slabs_reserved_available - 2];
-	bp->n_slabs_reserved_available -= 2;
-	pthread_mutex_unlock(&bp->lock);
-
-	return bc;
-}
-
-static void
-bcache_free(struct bcache *bc)
-{
-	struct bpool *bp;
-
-	if (!bc)
-		return;
-
-	/* In order to keep this example simple, the case of freeing any
-	 * existing buffers from the cache back to the pool is ignored.
-	 */
-
-	bp = bc->bp;
-	pthread_mutex_lock(&bp->lock);
-	bp->slabs_reserved[bp->n_slabs_reserved_available] = bc->slab_prod;
-	bp->slabs_reserved[bp->n_slabs_reserved_available + 1] = bc->slab_cons;
-	bp->n_slabs_reserved_available += 2;
-	pthread_mutex_unlock(&bp->lock);
-
-	free(bc);
-}
-
-/* To work correctly, the implementation requires that the *n_buffers* input
- * argument is never greater than the buffer pool's *n_buffers_per_slab*. This
- * is typically the case, with one exception taking place when large number of
- * buffers are allocated at init time (e.g. for the UMEM fill queue setup).
- */
-static inline u32
-bcache_cons_check(struct bcache *bc, u32 n_buffers)
-{
-	struct bpool *bp = bc->bp;
-	u64 n_buffers_per_slab = bp->params.n_buffers_per_slab;
-	u64 n_buffers_cons = bc->n_buffers_cons;
-	u64 n_slabs_available;
-	u64 *slab_full;
-
-	/*
-	 * Consumer slab is not empty: Use what's available locally. Do not
-	 * look for more buffers from the pool when the ask can only be
-	 * partially satisfied.
-	 */
-	if (n_buffers_cons)
-		return (n_buffers_cons < n_buffers) ?
-			n_buffers_cons :
-			n_buffers;
-
-	/*
-	 * Consumer slab is empty: look to trade the current consumer slab
-	 * (full) for a full slab from the pool, if any is available.
-	 */
-	pthread_mutex_lock(&bp->lock);
-	n_slabs_available = bp->n_slabs_available;
-	if (!n_slabs_available) {
-		pthread_mutex_unlock(&bp->lock);
-		return 0;
-	}
-
-	n_slabs_available--;
-	slab_full = bp->slabs[n_slabs_available];
-	bp->slabs[n_slabs_available] = bc->slab_cons;
-	bp->n_slabs_available = n_slabs_available;
-	pthread_mutex_unlock(&bp->lock);
-
-	bc->slab_cons = slab_full;
-	bc->n_buffers_cons = n_buffers_per_slab;
-	return n_buffers;
-}
-
-static inline u64
-bcache_cons(struct bcache *bc)
-{
-	u64 n_buffers_cons = bc->n_buffers_cons - 1;
-	u64 buffer;
-
-	buffer = bc->slab_cons[n_buffers_cons];
-	bc->n_buffers_cons = n_buffers_cons;
-	return buffer;
-}
-
-static inline void
-bcache_prod(struct bcache *bc, u64 buffer)
-{
-	struct bpool *bp = bc->bp;
-	u64 n_buffers_per_slab = bp->params.n_buffers_per_slab;
-	u64 n_buffers_prod = bc->n_buffers_prod;
-	u64 n_slabs_available;
-	u64 *slab_empty;
-
-	/*
-	 * Producer slab is not yet full: store the current buffer to it.
-	 */
-	if (n_buffers_prod < n_buffers_per_slab) {
-		bc->slab_prod[n_buffers_prod] = buffer;
-		bc->n_buffers_prod = n_buffers_prod + 1;
-		return;
-	}
-
-	/*
-	 * Producer slab is full: trade the cache's current producer slab
-	 * (full) for an empty slab from the pool, then store the current
-	 * buffer to the new producer slab. As one full slab exists in the
-	 * cache, it is guaranteed that there is at least one empty slab
-	 * available in the pool.
-	 */
-	pthread_mutex_lock(&bp->lock);
-	n_slabs_available = bp->n_slabs_available;
-	slab_empty = bp->slabs[n_slabs_available];
-	bp->slabs[n_slabs_available] = bc->slab_prod;
-	bp->n_slabs_available = n_slabs_available + 1;
-	pthread_mutex_unlock(&bp->lock);
-
-	slab_empty[0] = buffer;
-	bc->slab_prod = slab_empty;
-	bc->n_buffers_prod = 1;
-}
-
-/*
- * Port
- *
- * Each of the forwarding ports sits on top of an AF_XDP socket. In order for
- * packet forwarding to happen with no packet buffer copy, all the sockets need
- * to share the same UMEM area, which is used as the buffer pool memory.
- */
-#ifndef MAX_BURST_RX
-#define MAX_BURST_RX 64
-#endif
-
-#ifndef MAX_BURST_TX
-#define MAX_BURST_TX 64
-#endif
-
-struct burst_rx {
-	u64 addr[MAX_BURST_RX];
-	u32 len[MAX_BURST_RX];
-};
-
-struct burst_tx {
-	u64 addr[MAX_BURST_TX];
-	u32 len[MAX_BURST_TX];
-	u32 n_pkts;
-};
-
-struct port_params {
-	struct xsk_socket_config xsk_cfg;
-	struct bpool *bp;
-	const char *iface;
-	u32 iface_queue;
-};
-
-struct port {
-	struct port_params params;
-
-	struct bcache *bc;
-
-	struct xsk_ring_cons rxq;
-	struct xsk_ring_prod txq;
-	struct xsk_ring_prod umem_fq;
-	struct xsk_ring_cons umem_cq;
-	struct xsk_socket *xsk;
-	int umem_fq_initialized;
-
-	u64 n_pkts_rx;
-	u64 n_pkts_tx;
-};
-
-static void
-port_free(struct port *p)
-{
-	if (!p)
-		return;
-
-	/* To keep this example simple, the code to free the buffers from the
-	 * socket's receive and transmit queues, as well as from the UMEM fill
-	 * and completion queues, is not included.
-	 */
-
-	if (p->xsk)
-		xsk_socket__delete(p->xsk);
-
-	bcache_free(p->bc);
-
-	free(p);
-}
-
-static struct port *
-port_init(struct port_params *params)
-{
-	struct port *p;
-	u32 umem_fq_size, pos = 0;
-	int status, i;
-
-	/* Memory allocation and initialization. */
-	p = calloc(sizeof(struct port), 1);
-	if (!p)
-		return NULL;
-
-	memcpy(&p->params, params, sizeof(p->params));
-	umem_fq_size = params->bp->umem_cfg.fill_size;
-
-	/* bcache. */
-	p->bc = bcache_init(params->bp);
-	if (!p->bc ||
-	    (bcache_slab_size(p->bc) < umem_fq_size) ||
-	    (bcache_cons_check(p->bc, umem_fq_size) < umem_fq_size)) {
-		port_free(p);
-		return NULL;
-	}
-
-	/* xsk socket. */
-	status = xsk_socket__create_shared(&p->xsk,
-					   params->iface,
-					   params->iface_queue,
-					   params->bp->umem,
-					   &p->rxq,
-					   &p->txq,
-					   &p->umem_fq,
-					   &p->umem_cq,
-					   &params->xsk_cfg);
-	if (status) {
-		port_free(p);
-		return NULL;
-	}
-
-	/* umem fq. */
-	xsk_ring_prod__reserve(&p->umem_fq, umem_fq_size, &pos);
-
-	for (i = 0; i < umem_fq_size; i++)
-		*xsk_ring_prod__fill_addr(&p->umem_fq, pos + i) =
-			bcache_cons(p->bc);
-
-	xsk_ring_prod__submit(&p->umem_fq, umem_fq_size);
-	p->umem_fq_initialized = 1;
-
-	return p;
-}
-
-static inline u32
-port_rx_burst(struct port *p, struct burst_rx *b)
-{
-	u32 n_pkts, pos, i;
-
-	/* Free buffers for FQ replenish. */
-	n_pkts = ARRAY_SIZE(b->addr);
-
-	n_pkts = bcache_cons_check(p->bc, n_pkts);
-	if (!n_pkts)
-		return 0;
-
-	/* RXQ. */
-	n_pkts = xsk_ring_cons__peek(&p->rxq, n_pkts, &pos);
-	if (!n_pkts) {
-		if (xsk_ring_prod__needs_wakeup(&p->umem_fq)) {
-			struct pollfd pollfd = {
-				.fd = xsk_socket__fd(p->xsk),
-				.events = POLLIN,
-			};
-
-			poll(&pollfd, 1, 0);
-		}
-		return 0;
-	}
-
-	for (i = 0; i < n_pkts; i++) {
-		b->addr[i] = xsk_ring_cons__rx_desc(&p->rxq, pos + i)->addr;
-		b->len[i] = xsk_ring_cons__rx_desc(&p->rxq, pos + i)->len;
-	}
-
-	xsk_ring_cons__release(&p->rxq, n_pkts);
-	p->n_pkts_rx += n_pkts;
-
-	/* UMEM FQ. */
-	for ( ; ; ) {
-		int status;
-
-		status = xsk_ring_prod__reserve(&p->umem_fq, n_pkts, &pos);
-		if (status == n_pkts)
-			break;
-
-		if (xsk_ring_prod__needs_wakeup(&p->umem_fq)) {
-			struct pollfd pollfd = {
-				.fd = xsk_socket__fd(p->xsk),
-				.events = POLLIN,
-			};
-
-			poll(&pollfd, 1, 0);
-		}
-	}
-
-	for (i = 0; i < n_pkts; i++)
-		*xsk_ring_prod__fill_addr(&p->umem_fq, pos + i) =
-			bcache_cons(p->bc);
-
-	xsk_ring_prod__submit(&p->umem_fq, n_pkts);
-
-	return n_pkts;
-}
-
-static inline void
-port_tx_burst(struct port *p, struct burst_tx *b)
-{
-	u32 n_pkts, pos, i;
-	int status;
-
-	/* UMEM CQ. */
-	n_pkts = p->params.bp->umem_cfg.comp_size;
-
-	n_pkts = xsk_ring_cons__peek(&p->umem_cq, n_pkts, &pos);
-
-	for (i = 0; i < n_pkts; i++) {
-		u64 addr = *xsk_ring_cons__comp_addr(&p->umem_cq, pos + i);
-
-		bcache_prod(p->bc, addr);
-	}
-
-	xsk_ring_cons__release(&p->umem_cq, n_pkts);
-
-	/* TXQ. */
-	n_pkts = b->n_pkts;
-
-	for ( ; ; ) {
-		status = xsk_ring_prod__reserve(&p->txq, n_pkts, &pos);
-		if (status == n_pkts)
-			break;
-
-		if (xsk_ring_prod__needs_wakeup(&p->txq))
-			sendto(xsk_socket__fd(p->xsk), NULL, 0, MSG_DONTWAIT,
-			       NULL, 0);
-	}
-
-	for (i = 0; i < n_pkts; i++) {
-		xsk_ring_prod__tx_desc(&p->txq, pos + i)->addr = b->addr[i];
-		xsk_ring_prod__tx_desc(&p->txq, pos + i)->len = b->len[i];
-	}
-
-	xsk_ring_prod__submit(&p->txq, n_pkts);
-	if (xsk_ring_prod__needs_wakeup(&p->txq))
-		sendto(xsk_socket__fd(p->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
-	p->n_pkts_tx += n_pkts;
-}
-
-/*
- * Thread
- *
- * Packet forwarding threads.
- */
-#ifndef MAX_PORTS_PER_THREAD
-#define MAX_PORTS_PER_THREAD 16
-#endif
-
-struct thread_data {
-	struct port *ports_rx[MAX_PORTS_PER_THREAD];
-	struct port *ports_tx[MAX_PORTS_PER_THREAD];
-	u32 n_ports_rx;
-	struct burst_rx burst_rx;
-	struct burst_tx burst_tx[MAX_PORTS_PER_THREAD];
-	u32 cpu_core_id;
-	int quit;
-};
-
-static void swap_mac_addresses(void *data)
-{
-	struct ether_header *eth = (struct ether_header *)data;
-	struct ether_addr *src_addr = (struct ether_addr *)&eth->ether_shost;
-	struct ether_addr *dst_addr = (struct ether_addr *)&eth->ether_dhost;
-	struct ether_addr tmp;
-
-	tmp = *src_addr;
-	*src_addr = *dst_addr;
-	*dst_addr = tmp;
-}
-
-static void *
-thread_func(void *arg)
-{
-	struct thread_data *t = arg;
-	cpu_set_t cpu_cores;
-	u32 i;
-
-	CPU_ZERO(&cpu_cores);
-	CPU_SET(t->cpu_core_id, &cpu_cores);
-	pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpu_cores);
-
-	for (i = 0; !t->quit; i = (i + 1) & (t->n_ports_rx - 1)) {
-		struct port *port_rx = t->ports_rx[i];
-		struct port *port_tx = t->ports_tx[i];
-		struct burst_rx *brx = &t->burst_rx;
-		struct burst_tx *btx = &t->burst_tx[i];
-		u32 n_pkts, j;
-
-		/* RX. */
-		n_pkts = port_rx_burst(port_rx, brx);
-		if (!n_pkts)
-			continue;
-
-		/* Process & TX. */
-		for (j = 0; j < n_pkts; j++) {
-			u64 addr = xsk_umem__add_offset_to_addr(brx->addr[j]);
-			u8 *pkt = xsk_umem__get_data(port_rx->params.bp->addr,
-						     addr);
-
-			swap_mac_addresses(pkt);
-
-			btx->addr[btx->n_pkts] = brx->addr[j];
-			btx->len[btx->n_pkts] = brx->len[j];
-			btx->n_pkts++;
-
-			if (btx->n_pkts == MAX_BURST_TX) {
-				port_tx_burst(port_tx, btx);
-				btx->n_pkts = 0;
-			}
-		}
-	}
-
-	return NULL;
-}
-
-/*
- * Process
- */
-static const struct bpool_params bpool_params_default = {
-	.n_buffers = 64 * 1024,
-	.buffer_size = XSK_UMEM__DEFAULT_FRAME_SIZE,
-	.mmap_flags = 0,
-
-	.n_users_max = 16,
-	.n_buffers_per_slab = XSK_RING_PROD__DEFAULT_NUM_DESCS * 2,
-};
-
-static const struct xsk_umem_config umem_cfg_default = {
-	.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS * 2,
-	.comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
-	.frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE,
-	.frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM,
-	.flags = 0,
-};
-
-static const struct port_params port_params_default = {
-	.xsk_cfg = {
-		.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
-		.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
-		.libbpf_flags = 0,
-		.xdp_flags = XDP_FLAGS_DRV_MODE,
-		.bind_flags = XDP_USE_NEED_WAKEUP | XDP_ZEROCOPY,
-	},
-
-	.bp = NULL,
-	.iface = NULL,
-	.iface_queue = 0,
-};
-
-#ifndef MAX_PORTS
-#define MAX_PORTS 64
-#endif
-
-#ifndef MAX_THREADS
-#define MAX_THREADS 64
-#endif
-
-static struct bpool_params bpool_params;
-static struct xsk_umem_config umem_cfg;
-static struct bpool *bp;
-
-static struct port_params port_params[MAX_PORTS];
-static struct port *ports[MAX_PORTS];
-static u64 n_pkts_rx[MAX_PORTS];
-static u64 n_pkts_tx[MAX_PORTS];
-static int n_ports;
-
-static pthread_t threads[MAX_THREADS];
-static struct thread_data thread_data[MAX_THREADS];
-static int n_threads;
-
-static void
-print_usage(char *prog_name)
-{
-	const char *usage =
-		"Usage:\n"
-		"\t%s [ -b SIZE ] -c CORE -i INTERFACE [ -q QUEUE ]\n"
-		"\n"
-		"-c CORE        CPU core to run a packet forwarding thread\n"
-		"               on. May be invoked multiple times.\n"
-		"\n"
-		"-b SIZE        Number of buffers in the buffer pool shared\n"
-		"               by all the forwarding threads. Default: %u.\n"
-		"\n"
-		"-i INTERFACE   Network interface. Each (INTERFACE, QUEUE)\n"
-		"               pair specifies one forwarding port. May be\n"
-		"               invoked multiple times.\n"
-		"\n"
-		"-q QUEUE       Network interface queue for RX and TX. Each\n"
-		"               (INTERFACE, QUEUE) pair specified one\n"
-		"               forwarding port. Default: %u. May be invoked\n"
-		"               multiple times.\n"
-		"\n";
-	printf(usage,
-	       prog_name,
-	       bpool_params_default.n_buffers,
-	       port_params_default.iface_queue);
-}
-
-static int
-parse_args(int argc, char **argv)
-{
-	struct option lgopts[] = {
-		{ NULL,  0, 0, 0 }
-	};
-	int opt, option_index;
-
-	/* Parse the input arguments. */
-	for ( ; ;) {
-		opt = getopt_long(argc, argv, "c:i:q:", lgopts, &option_index);
-		if (opt == EOF)
-			break;
-
-		switch (opt) {
-		case 'b':
-			bpool_params.n_buffers = atoi(optarg);
-			break;
-
-		case 'c':
-			if (n_threads == MAX_THREADS) {
-				printf("Max number of threads (%d) reached.\n",
-				       MAX_THREADS);
-				return -1;
-			}
-
-			thread_data[n_threads].cpu_core_id = atoi(optarg);
-			n_threads++;
-			break;
-
-		case 'i':
-			if (n_ports == MAX_PORTS) {
-				printf("Max number of ports (%d) reached.\n",
-				       MAX_PORTS);
-				return -1;
-			}
-
-			port_params[n_ports].iface = optarg;
-			port_params[n_ports].iface_queue = 0;
-			n_ports++;
-			break;
-
-		case 'q':
-			if (n_ports == 0) {
-				printf("No port specified for queue.\n");
-				return -1;
-			}
-			port_params[n_ports - 1].iface_queue = atoi(optarg);
-			break;
-
-		default:
-			printf("Illegal argument.\n");
-			return -1;
-		}
-	}
-
-	optind = 1; /* reset getopt lib */
-
-	/* Check the input arguments. */
-	if (!n_ports) {
-		printf("No ports specified.\n");
-		return -1;
-	}
-
-	if (!n_threads) {
-		printf("No threads specified.\n");
-		return -1;
-	}
-
-	if (n_ports % n_threads) {
-		printf("Ports cannot be evenly distributed to threads.\n");
-		return -1;
-	}
-
-	return 0;
-}
-
-static void
-print_port(u32 port_id)
-{
-	struct port *port = ports[port_id];
-
-	printf("Port %u: interface = %s, queue = %u\n",
-	       port_id, port->params.iface, port->params.iface_queue);
-}
-
-static void
-print_thread(u32 thread_id)
-{
-	struct thread_data *t = &thread_data[thread_id];
-	u32 i;
-
-	printf("Thread %u (CPU core %u): ",
-	       thread_id, t->cpu_core_id);
-
-	for (i = 0; i < t->n_ports_rx; i++) {
-		struct port *port_rx = t->ports_rx[i];
-		struct port *port_tx = t->ports_tx[i];
-
-		printf("(%s, %u) -> (%s, %u), ",
-		       port_rx->params.iface,
-		       port_rx->params.iface_queue,
-		       port_tx->params.iface,
-		       port_tx->params.iface_queue);
-	}
-
-	printf("\n");
-}
-
-static void
-print_port_stats_separator(void)
-{
-	printf("+-%4s-+-%12s-+-%13s-+-%12s-+-%13s-+\n",
-	       "----",
-	       "------------",
-	       "-------------",
-	       "------------",
-	       "-------------");
-}
-
-static void
-print_port_stats_header(void)
-{
-	print_port_stats_separator();
-	printf("| %4s | %12s | %13s | %12s | %13s |\n",
-	       "Port",
-	       "RX packets",
-	       "RX rate (pps)",
-	       "TX packets",
-	       "TX_rate (pps)");
-	print_port_stats_separator();
-}
-
-static void
-print_port_stats_trailer(void)
-{
-	print_port_stats_separator();
-	printf("\n");
-}
-
-static void
-print_port_stats(int port_id, u64 ns_diff)
-{
-	struct port *p = ports[port_id];
-	double rx_pps, tx_pps;
-
-	rx_pps = (p->n_pkts_rx - n_pkts_rx[port_id]) * 1000000000. / ns_diff;
-	tx_pps = (p->n_pkts_tx - n_pkts_tx[port_id]) * 1000000000. / ns_diff;
-
-	printf("| %4d | %12llu | %13.0f | %12llu | %13.0f |\n",
-	       port_id,
-	       p->n_pkts_rx,
-	       rx_pps,
-	       p->n_pkts_tx,
-	       tx_pps);
-
-	n_pkts_rx[port_id] = p->n_pkts_rx;
-	n_pkts_tx[port_id] = p->n_pkts_tx;
-}
-
-static void
-print_port_stats_all(u64 ns_diff)
-{
-	int i;
-
-	print_port_stats_header();
-	for (i = 0; i < n_ports; i++)
-		print_port_stats(i, ns_diff);
-	print_port_stats_trailer();
-}
-
-static int quit;
-
-static void
-signal_handler(int sig)
-{
-	quit = 1;
-}
-
-static void remove_xdp_program(void)
-{
-	int i;
-
-	for (i = 0 ; i < n_ports; i++)
-		bpf_xdp_detach(if_nametoindex(port_params[i].iface),
-			       port_params[i].xsk_cfg.xdp_flags, NULL);
-}
-
-int main(int argc, char **argv)
-{
-	struct timespec time;
-	u64 ns0;
-	int i;
-
-	/* Parse args. */
-	memcpy(&bpool_params, &bpool_params_default,
-	       sizeof(struct bpool_params));
-	memcpy(&umem_cfg, &umem_cfg_default,
-	       sizeof(struct xsk_umem_config));
-	for (i = 0; i < MAX_PORTS; i++)
-		memcpy(&port_params[i], &port_params_default,
-		       sizeof(struct port_params));
-
-	if (parse_args(argc, argv)) {
-		print_usage(argv[0]);
-		return -1;
-	}
-
-	/* Buffer pool initialization. */
-	bp = bpool_init(&bpool_params, &umem_cfg);
-	if (!bp) {
-		printf("Buffer pool initialization failed.\n");
-		return -1;
-	}
-	printf("Buffer pool created successfully.\n");
-
-	/* Ports initialization. */
-	for (i = 0; i < MAX_PORTS; i++)
-		port_params[i].bp = bp;
-
-	for (i = 0; i < n_ports; i++) {
-		ports[i] = port_init(&port_params[i]);
-		if (!ports[i]) {
-			printf("Port %d initialization failed.\n", i);
-			return -1;
-		}
-		print_port(i);
-	}
-	printf("All ports created successfully.\n");
-
-	/* Threads. */
-	for (i = 0; i < n_threads; i++) {
-		struct thread_data *t = &thread_data[i];
-		u32 n_ports_per_thread = n_ports / n_threads, j;
-
-		for (j = 0; j < n_ports_per_thread; j++) {
-			t->ports_rx[j] = ports[i * n_ports_per_thread + j];
-			t->ports_tx[j] = ports[i * n_ports_per_thread +
-				(j + 1) % n_ports_per_thread];
-		}
-
-		t->n_ports_rx = n_ports_per_thread;
-
-		print_thread(i);
-	}
-
-	for (i = 0; i < n_threads; i++) {
-		int status;
-
-		status = pthread_create(&threads[i],
-					NULL,
-					thread_func,
-					&thread_data[i]);
-		if (status) {
-			printf("Thread %d creation failed.\n", i);
-			return -1;
-		}
-	}
-	printf("All threads created successfully.\n");
-
-	/* Print statistics. */
-	signal(SIGINT, signal_handler);
-	signal(SIGTERM, signal_handler);
-	signal(SIGABRT, signal_handler);
-
-	clock_gettime(CLOCK_MONOTONIC, &time);
-	ns0 = time.tv_sec * 1000000000UL + time.tv_nsec;
-	for ( ; !quit; ) {
-		u64 ns1, ns_diff;
-
-		sleep(1);
-		clock_gettime(CLOCK_MONOTONIC, &time);
-		ns1 = time.tv_sec * 1000000000UL + time.tv_nsec;
-		ns_diff = ns1 - ns0;
-		ns0 = ns1;
-
-		print_port_stats_all(ns_diff);
-	}
-
-	/* Threads completion. */
-	printf("Quit.\n");
-	for (i = 0; i < n_threads; i++)
-		thread_data[i].quit = 1;
-
-	for (i = 0; i < n_threads; i++)
-		pthread_join(threads[i], NULL);
-
-	for (i = 0; i < n_ports; i++)
-		port_free(ports[i]);
-
-	bpool_free(bp);
-
-	remove_xdp_program();
-
-	return 0;
-}