Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 1673 insertions, 0 deletions

diff --git a/samples/bpf/xdp_sample_user.c b/samples/bpf/xdp_sample_user.c
new file mode 100644
index 000000000..158682852
--- /dev/null
+++ b/samples/bpf/xdp_sample_user.c
@@ -0,0 +1,1673 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#define _GNU_SOURCE
+
+#include <arpa/inet.h>
+#include <bpf/bpf.h>
+#include <bpf/libbpf.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <linux/ethtool.h>
+#include <linux/hashtable.h>
+#include <linux/if_link.h>
+#include <linux/jhash.h>
+#include <linux/limits.h>
+#include <linux/list.h>
+#include <linux/sockios.h>
+#include <locale.h>
+#include <math.h>
+#include <net/if.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/signalfd.h>
+#include <sys/sysinfo.h>
+#include <sys/timerfd.h>
+#include <sys/utsname.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "bpf_util.h"
+#include "xdp_sample_user.h"
+
+#define __sample_print(fmt, cond, ...)                                         \
+	({                                                                     \
+		if (cond)                                                      \
+			printf(fmt, ##__VA_ARGS__);                            \
+	})
+
+#define print_always(fmt, ...) __sample_print(fmt, 1, ##__VA_ARGS__)
+#define print_default(fmt, ...)                                                \
+	__sample_print(fmt, sample_log_level & LL_DEFAULT, ##__VA_ARGS__)
+#define __print_err(err, fmt, ...)                                             \
+	({                                                                     \
+		__sample_print(fmt, err > 0 || sample_log_level & LL_DEFAULT,  \
+			       ##__VA_ARGS__);                                 \
+		sample_err_exp = sample_err_exp ? true : err > 0;              \
+	})
+#define print_err(err, fmt, ...) __print_err(err, fmt, ##__VA_ARGS__)
+
+#define __COLUMN(x) "%'10" x " %-13s"
+#define FMT_COLUMNf __COLUMN(".0f")
+#define FMT_COLUMNd __COLUMN("d")
+#define FMT_COLUMNl __COLUMN("llu")
+#define RX(rx) rx, "rx/s"
+#define PPS(pps) pps, "pkt/s"
+#define DROP(drop) drop, "drop/s"
+#define ERR(err) err, "error/s"
+#define HITS(hits) hits, "hit/s"
+#define XMIT(xmit) xmit, "xmit/s"
+#define PASS(pass) pass, "pass/s"
+#define REDIR(redir) redir, "redir/s"
+#define NANOSEC_PER_SEC 1000000000 /* 10^9 */
+
+#define XDP_UNKNOWN (XDP_REDIRECT + 1)
+#define XDP_ACTION_MAX (XDP_UNKNOWN + 1)
+#define XDP_REDIRECT_ERR_MAX 7
+
+enum map_type {
+	MAP_RX,
+	MAP_REDIRECT_ERR,
+	MAP_CPUMAP_ENQUEUE,
+	MAP_CPUMAP_KTHREAD,
+	MAP_EXCEPTION,
+	MAP_DEVMAP_XMIT,
+	MAP_DEVMAP_XMIT_MULTI,
+	NUM_MAP,
+};
+
+enum log_level {
+	LL_DEFAULT = 1U << 0,
+	LL_SIMPLE = 1U << 1,
+	LL_DEBUG = 1U << 2,
+};
+
+struct record {
+	__u64 timestamp;
+	struct datarec total;
+	struct datarec *cpu;
+};
+
+struct map_entry {
+	struct hlist_node node;
+	__u64 pair;
+	struct record val;
+};
+
+struct stats_record {
+	struct record rx_cnt;
+	struct record redir_err[XDP_REDIRECT_ERR_MAX];
+	struct record kthread;
+	struct record exception[XDP_ACTION_MAX];
+	struct record devmap_xmit;
+	DECLARE_HASHTABLE(xmit_map, 5);
+	struct record enq[];
+};
+
+struct sample_output {
+	struct {
+		__u64 rx;
+		__u64 redir;
+		__u64 drop;
+		__u64 drop_xmit;
+		__u64 err;
+		__u64 xmit;
+	} totals;
+	struct {
+		union {
+			__u64 pps;
+			__u64 num;
+		};
+		__u64 drop;
+		__u64 err;
+	} rx_cnt;
+	struct {
+		__u64 suc;
+		__u64 err;
+	} redir_cnt;
+	struct {
+		__u64 hits;
+	} except_cnt;
+	struct {
+		__u64 pps;
+		__u64 drop;
+		__u64 err;
+		double bavg;
+	} xmit_cnt;
+};
+
+struct xdp_desc {
+	int ifindex;
+	__u32 prog_id;
+	int flags;
+} sample_xdp_progs[32];
+
+struct datarec *sample_mmap[NUM_MAP];
+struct bpf_map *sample_map[NUM_MAP];
+size_t sample_map_count[NUM_MAP];
+enum log_level sample_log_level;
+struct sample_output sample_out;
+unsigned long sample_interval;
+bool sample_err_exp;
+int sample_xdp_cnt;
+int sample_n_cpus;
+int sample_sig_fd;
+int sample_mask;
+
+static const char *xdp_redirect_err_names[XDP_REDIRECT_ERR_MAX] = {
+	/* Key=1 keeps unknown errors */
+	"Success",
+	"Unknown",
+	"EINVAL",
+	"ENETDOWN",
+	"EMSGSIZE",
+	"EOPNOTSUPP",
+	"ENOSPC",
+};
+
+/* Keyed from Unknown */
+static const char *xdp_redirect_err_help[XDP_REDIRECT_ERR_MAX - 1] = {
+	"Unknown error",
+	"Invalid redirection",
+	"Device being redirected to is down",
+	"Packet length too large for device",
+	"Operation not supported",
+	"No space in ptr_ring of cpumap kthread",
+};
+
+static const char *xdp_action_names[XDP_ACTION_MAX] = {
+	[XDP_ABORTED]  = "XDP_ABORTED",
+	[XDP_DROP]     = "XDP_DROP",
+	[XDP_PASS]     = "XDP_PASS",
+	[XDP_TX]       = "XDP_TX",
+	[XDP_REDIRECT] = "XDP_REDIRECT",
+	[XDP_UNKNOWN]  = "XDP_UNKNOWN",
+};
+
+static __u64 gettime(void)
+{
+	struct timespec t;
+	int res;
+
+	res = clock_gettime(CLOCK_MONOTONIC, &t);
+	if (res < 0) {
+		fprintf(stderr, "Error with gettimeofday! (%i)\n", res);
+		return UINT64_MAX;
+	}
+	return (__u64)t.tv_sec * NANOSEC_PER_SEC + t.tv_nsec;
+}
+
+static const char *action2str(int action)
+{
+	if (action < XDP_ACTION_MAX)
+		return xdp_action_names[action];
+	return NULL;
+}
+
+static void sample_print_help(int mask)
+{
+	printf("Output format description\n\n"
+	       "By default, redirect success statistics are disabled, use -s to enable.\n"
+	       "The terse output mode is default, verbose mode can be activated using -v\n"
+	       "Use SIGQUIT (Ctrl + \\) to switch the mode dynamically at runtime\n\n"
+	       "Terse mode displays at most the following fields:\n"
+	       "  rx/s        Number of packets received per second\n"
+	       "  redir/s     Number of packets successfully redirected per second\n"
+	       "  err,drop/s  Aggregated count of errors per second (including dropped packets)\n"
+	       "  xmit/s      Number of packets transmitted on the output device per second\n\n"
+	       "Output description for verbose mode:\n"
+	       "  FIELD                 DESCRIPTION\n");
+
+	if (mask & SAMPLE_RX_CNT) {
+		printf("  receive\t\tDisplays the number of packets received & errors encountered\n"
+		       " \t\t\tWhenever an error or packet drop occurs, details of per CPU error\n"
+		       " \t\t\tand drop statistics will be expanded inline in terse mode.\n"
+		       " \t\t\t\tpkt/s     - Packets received per second\n"
+		       " \t\t\t\tdrop/s    - Packets dropped per second\n"
+		       " \t\t\t\terror/s   - Errors encountered per second\n\n");
+	}
+	if (mask & (SAMPLE_REDIRECT_CNT | SAMPLE_REDIRECT_ERR_CNT)) {
+		printf("  redirect\t\tDisplays the number of packets successfully redirected\n"
+		       "  \t\t\tErrors encountered are expanded under redirect_err field\n"
+		       "  \t\t\tNote that passing -s to enable it has a per packet overhead\n"
+		       "  \t\t\t\tredir/s   - Packets redirected successfully per second\n\n"
+		       "  redirect_err\t\tDisplays the number of packets that failed redirection\n"
+		       "  \t\t\tThe errno is expanded under this field with per CPU count\n"
+		       "  \t\t\tThe recognized errors are:\n");
+
+		for (int i = 2; i < XDP_REDIRECT_ERR_MAX; i++)
+			printf("\t\t\t  %s: %s\n", xdp_redirect_err_names[i],
+			       xdp_redirect_err_help[i - 1]);
+
+		printf("  \n\t\t\t\terror/s   - Packets that failed redirection per second\n\n");
+	}
+
+	if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT) {
+		printf("  enqueue to cpu N\tDisplays the number of packets enqueued to bulk queue of CPU N\n"
+		       "  \t\t\tExpands to cpu:FROM->N to display enqueue stats for each CPU enqueuing to CPU N\n"
+		       "  \t\t\tReceived packets can be associated with the CPU redirect program is enqueuing \n"
+		       "  \t\t\tpackets to.\n"
+		       "  \t\t\t\tpkt/s    - Packets enqueued per second from other CPU to CPU N\n"
+		       "  \t\t\t\tdrop/s   - Packets dropped when trying to enqueue to CPU N\n"
+		       "  \t\t\t\tbulk-avg - Average number of packets processed for each event\n\n");
+	}
+
+	if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) {
+		printf("  kthread\t\tDisplays the number of packets processed in CPUMAP kthread for each CPU\n"
+		       "  \t\t\tPackets consumed from ptr_ring in kthread, and its xdp_stats (after calling \n"
+		       "  \t\t\tCPUMAP bpf prog) are expanded below this. xdp_stats are expanded as a total and\n"
+		       "  \t\t\tthen per-CPU to associate it to each CPU's pinned CPUMAP kthread.\n"
+		       "  \t\t\t\tpkt/s    - Packets consumed per second from ptr_ring\n"
+		       "  \t\t\t\tdrop/s   - Packets dropped per second in kthread\n"
+		       "  \t\t\t\tsched    - Number of times kthread called schedule()\n\n"
+		       "  \t\t\txdp_stats (also expands to per-CPU counts)\n"
+		       "  \t\t\t\tpass/s  - XDP_PASS count for CPUMAP program execution\n"
+		       "  \t\t\t\tdrop/s  - XDP_DROP count for CPUMAP program execution\n"
+		       "  \t\t\t\tredir/s - XDP_REDIRECT count for CPUMAP program execution\n\n");
+	}
+
+	if (mask & SAMPLE_EXCEPTION_CNT) {
+		printf("  xdp_exception\t\tDisplays xdp_exception tracepoint events\n"
+		       "  \t\t\tThis can occur due to internal driver errors, unrecognized\n"
+		       "  \t\t\tXDP actions and due to explicit user trigger by use of XDP_ABORTED\n"
+		       "  \t\t\tEach action is expanded below this field with its count\n"
+		       "  \t\t\t\thit/s     - Number of times the tracepoint was hit per second\n\n");
+	}
+
+	if (mask & SAMPLE_DEVMAP_XMIT_CNT) {
+		printf("  devmap_xmit\t\tDisplays devmap_xmit tracepoint events\n"
+		       "  \t\t\tThis tracepoint is invoked for successful transmissions on output\n"
+		       "  \t\t\tdevice but these statistics are not available for generic XDP mode,\n"
+		       "  \t\t\thence they will be omitted from the output when using SKB mode\n"
+		       "  \t\t\t\txmit/s    - Number of packets that were transmitted per second\n"
+		       "  \t\t\t\tdrop/s    - Number of packets that failed transmissions per second\n"
+		       "  \t\t\t\tdrv_err/s - Number of internal driver errors per second\n"
+		       "  \t\t\t\tbulk-avg  - Average number of packets processed for each event\n\n");
+	}
+}
+
+void sample_usage(char *argv[], const struct option *long_options,
+		  const char *doc, int mask, bool error)
+{
+	int i;
+
+	if (!error)
+		sample_print_help(mask);
+
+	printf("\n%s\nOption for %s:\n", doc, argv[0]);
+	for (i = 0; long_options[i].name != 0; i++) {
+		printf(" --%-15s", long_options[i].name);
+		if (long_options[i].flag != NULL)
+			printf(" flag (internal value: %d)",
+			       *long_options[i].flag);
+		else
+			printf("\t short-option: -%c", long_options[i].val);
+		printf("\n");
+	}
+	printf("\n");
+}
+
+static struct datarec *alloc_record_per_cpu(void)
+{
+	unsigned int nr_cpus = libbpf_num_possible_cpus();
+	struct datarec *array;
+
+	array = calloc(nr_cpus, sizeof(*array));
+	if (!array) {
+		fprintf(stderr, "Failed to allocate memory (nr_cpus: %u)\n",
+			nr_cpus);
+		return NULL;
+	}
+	return array;
+}
+
+static int map_entry_init(struct map_entry *e, __u64 pair)
+{
+	e->pair = pair;
+	INIT_HLIST_NODE(&e->node);
+	e->val.timestamp = gettime();
+	e->val.cpu = alloc_record_per_cpu();
+	if (!e->val.cpu)
+		return -ENOMEM;
+	return 0;
+}
+
+static void map_collect_percpu(struct datarec *values, struct record *rec)
+{
+	/* For percpu maps, userspace gets a value per possible CPU */
+	unsigned int nr_cpus = libbpf_num_possible_cpus();
+	__u64 sum_xdp_redirect = 0;
+	__u64 sum_processed = 0;
+	__u64 sum_xdp_pass = 0;
+	__u64 sum_xdp_drop = 0;
+	__u64 sum_dropped = 0;
+	__u64 sum_issue = 0;
+	int i;
+
+	/* Get time as close as possible to reading map contents */
+	rec->timestamp = gettime();
+
+	/* Record and sum values from each CPU */
+	for (i = 0; i < nr_cpus; i++) {
+		rec->cpu[i].processed = READ_ONCE(values[i].processed);
+		rec->cpu[i].dropped = READ_ONCE(values[i].dropped);
+		rec->cpu[i].issue = READ_ONCE(values[i].issue);
+		rec->cpu[i].xdp_pass = READ_ONCE(values[i].xdp_pass);
+		rec->cpu[i].xdp_drop = READ_ONCE(values[i].xdp_drop);
+		rec->cpu[i].xdp_redirect = READ_ONCE(values[i].xdp_redirect);
+
+		sum_processed += rec->cpu[i].processed;
+		sum_dropped += rec->cpu[i].dropped;
+		sum_issue += rec->cpu[i].issue;
+		sum_xdp_pass += rec->cpu[i].xdp_pass;
+		sum_xdp_drop += rec->cpu[i].xdp_drop;
+		sum_xdp_redirect += rec->cpu[i].xdp_redirect;
+	}
+
+	rec->total.processed = sum_processed;
+	rec->total.dropped = sum_dropped;
+	rec->total.issue = sum_issue;
+	rec->total.xdp_pass = sum_xdp_pass;
+	rec->total.xdp_drop = sum_xdp_drop;
+	rec->total.xdp_redirect = sum_xdp_redirect;
+}
+
+static int map_collect_percpu_devmap(int map_fd, struct stats_record *rec)
+{
+	unsigned int nr_cpus = bpf_num_possible_cpus();
+	__u32 batch, count = 32;
+	struct datarec *values;
+	bool init = false;
+	__u64 *keys;
+	int i, ret;
+
+	keys = calloc(count, sizeof(__u64));
+	if (!keys)
+		return -ENOMEM;
+	values = calloc(count * nr_cpus, sizeof(struct datarec));
+	if (!values) {
+		free(keys);
+		return -ENOMEM;
+	}
+
+	for (;;) {
+		bool exit = false;
+
+		ret = bpf_map_lookup_batch(map_fd, init ? &batch : NULL, &batch,
+					   keys, values, &count, NULL);
+		if (ret < 0 && errno != ENOENT)
+			break;
+		if (errno == ENOENT)
+			exit = true;
+
+		init = true;
+		for (i = 0; i < count; i++) {
+			struct map_entry *e, *x = NULL;
+			__u64 pair = keys[i];
+			struct datarec *arr;
+
+			arr = &values[i * nr_cpus];
+			hash_for_each_possible(rec->xmit_map, e, node, pair) {
+				if (e->pair == pair) {
+					x = e;
+					break;
+				}
+			}
+			if (!x) {
+				x = calloc(1, sizeof(*x));
+				if (!x)
+					goto cleanup;
+				if (map_entry_init(x, pair) < 0) {
+					free(x);
+					goto cleanup;
+				}
+				hash_add(rec->xmit_map, &x->node, pair);
+			}
+			map_collect_percpu(arr, &x->val);
+		}
+
+		if (exit)
+			break;
+		count = 32;
+	}
+
+	free(values);
+	free(keys);
+	return 0;
+cleanup:
+	free(values);
+	free(keys);
+	return -ENOMEM;
+}
+
+static struct stats_record *alloc_stats_record(void)
+{
+	struct stats_record *rec;
+	int i;
+
+	rec = calloc(1, sizeof(*rec) + sample_n_cpus * sizeof(struct record));
+	if (!rec) {
+		fprintf(stderr, "Failed to allocate memory\n");
+		return NULL;
+	}
+
+	if (sample_mask & SAMPLE_RX_CNT) {
+		rec->rx_cnt.cpu = alloc_record_per_cpu();
+		if (!rec->rx_cnt.cpu) {
+			fprintf(stderr,
+				"Failed to allocate rx_cnt per-CPU array\n");
+			goto end_rec;
+		}
+	}
+	if (sample_mask & (SAMPLE_REDIRECT_CNT | SAMPLE_REDIRECT_ERR_CNT)) {
+		for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++) {
+			rec->redir_err[i].cpu = alloc_record_per_cpu();
+			if (!rec->redir_err[i].cpu) {
+				fprintf(stderr,
+					"Failed to allocate redir_err per-CPU array for "
+					"\"%s\" case\n",
+					xdp_redirect_err_names[i]);
+				while (i--)
+					free(rec->redir_err[i].cpu);
+				goto end_rx_cnt;
+			}
+		}
+	}
+	if (sample_mask & SAMPLE_CPUMAP_KTHREAD_CNT) {
+		rec->kthread.cpu = alloc_record_per_cpu();
+		if (!rec->kthread.cpu) {
+			fprintf(stderr,
+				"Failed to allocate kthread per-CPU array\n");
+			goto end_redir;
+		}
+	}
+	if (sample_mask & SAMPLE_EXCEPTION_CNT) {
+		for (i = 0; i < XDP_ACTION_MAX; i++) {
+			rec->exception[i].cpu = alloc_record_per_cpu();
+			if (!rec->exception[i].cpu) {
+				fprintf(stderr,
+					"Failed to allocate exception per-CPU array for "
+					"\"%s\" case\n",
+					action2str(i));
+				while (i--)
+					free(rec->exception[i].cpu);
+				goto end_kthread;
+			}
+		}
+	}
+	if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT) {
+		rec->devmap_xmit.cpu = alloc_record_per_cpu();
+		if (!rec->devmap_xmit.cpu) {
+			fprintf(stderr,
+				"Failed to allocate devmap_xmit per-CPU array\n");
+			goto end_exception;
+		}
+	}
+	if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI)
+		hash_init(rec->xmit_map);
+	if (sample_mask & SAMPLE_CPUMAP_ENQUEUE_CNT) {
+		for (i = 0; i < sample_n_cpus; i++) {
+			rec->enq[i].cpu = alloc_record_per_cpu();
+			if (!rec->enq[i].cpu) {
+				fprintf(stderr,
+					"Failed to allocate enqueue per-CPU array for "
+					"CPU %d\n",
+					i);
+				while (i--)
+					free(rec->enq[i].cpu);
+				goto end_devmap_xmit;
+			}
+		}
+	}
+
+	return rec;
+
+end_devmap_xmit:
+	free(rec->devmap_xmit.cpu);
+end_exception:
+	for (i = 0; i < XDP_ACTION_MAX; i++)
+		free(rec->exception[i].cpu);
+end_kthread:
+	free(rec->kthread.cpu);
+end_redir:
+	for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++)
+		free(rec->redir_err[i].cpu);
+end_rx_cnt:
+	free(rec->rx_cnt.cpu);
+end_rec:
+	free(rec);
+	return NULL;
+}
+
+static void free_stats_record(struct stats_record *r)
+{
+	struct hlist_node *tmp;
+	struct map_entry *e;
+	int i;
+
+	for (i = 0; i < sample_n_cpus; i++)
+		free(r->enq[i].cpu);
+	hash_for_each_safe(r->xmit_map, i, tmp, e, node) {
+		hash_del(&e->node);
+		free(e->val.cpu);
+		free(e);
+	}
+	free(r->devmap_xmit.cpu);
+	for (i = 0; i < XDP_ACTION_MAX; i++)
+		free(r->exception[i].cpu);
+	free(r->kthread.cpu);
+	for (i = 0; i < XDP_REDIRECT_ERR_MAX; i++)
+		free(r->redir_err[i].cpu);
+	free(r->rx_cnt.cpu);
+	free(r);
+}
+
+static double calc_period(struct record *r, struct record *p)
+{
+	double period_ = 0;
+	__u64 period = 0;
+
+	period = r->timestamp - p->timestamp;
+	if (period > 0)
+		period_ = ((double)period / NANOSEC_PER_SEC);
+
+	return period_;
+}
+
+static double sample_round(double val)
+{
+	if (val - floor(val) < 0.5)
+		return floor(val);
+	return ceil(val);
+}
+
+static __u64 calc_pps(struct datarec *r, struct datarec *p, double period_)
+{
+	__u64 packets = 0;
+	__u64 pps = 0;
+
+	if (period_ > 0) {
+		packets = r->processed - p->processed;
+		pps = sample_round(packets / period_);
+	}
+	return pps;
+}
+
+static __u64 calc_drop_pps(struct datarec *r, struct datarec *p, double period_)
+{
+	__u64 packets = 0;
+	__u64 pps = 0;
+
+	if (period_ > 0) {
+		packets = r->dropped - p->dropped;
+		pps = sample_round(packets / period_);
+	}
+	return pps;
+}
+
+static __u64 calc_errs_pps(struct datarec *r, struct datarec *p, double period_)
+{
+	__u64 packets = 0;
+	__u64 pps = 0;
+
+	if (period_ > 0) {
+		packets = r->issue - p->issue;
+		pps = sample_round(packets / period_);
+	}
+	return pps;
+}
+
+static __u64 calc_info_pps(struct datarec *r, struct datarec *p, double period_)
+{
+	__u64 packets = 0;
+	__u64 pps = 0;
+
+	if (period_ > 0) {
+		packets = r->info - p->info;
+		pps = sample_round(packets / period_);
+	}
+	return pps;
+}
+
+static void calc_xdp_pps(struct datarec *r, struct datarec *p, double *xdp_pass,
+			 double *xdp_drop, double *xdp_redirect, double period_)
+{
+	*xdp_pass = 0, *xdp_drop = 0, *xdp_redirect = 0;
+	if (period_ > 0) {
+		*xdp_redirect = (r->xdp_redirect - p->xdp_redirect) / period_;
+		*xdp_pass = (r->xdp_pass - p->xdp_pass) / period_;
+		*xdp_drop = (r->xdp_drop - p->xdp_drop) / period_;
+	}
+}
+
+static void stats_get_rx_cnt(struct stats_record *stats_rec,
+			     struct stats_record *stats_prev,
+			     unsigned int nr_cpus, struct sample_output *out)
+{
+	struct record *rec, *prev;
+	double t, pps, drop, err;
+	int i;
+
+	rec = &stats_rec->rx_cnt;
+	prev = &stats_prev->rx_cnt;
+	t = calc_period(rec, prev);
+
+	for (i = 0; i < nr_cpus; i++) {
+		struct datarec *r = &rec->cpu[i];
+		struct datarec *p = &prev->cpu[i];
+		char str[64];
+
+		pps = calc_pps(r, p, t);
+		drop = calc_drop_pps(r, p, t);
+		err = calc_errs_pps(r, p, t);
+		if (!pps && !drop && !err)
+			continue;
+
+		snprintf(str, sizeof(str), "cpu:%d", i);
+		print_default("    %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf
+			      "\n",
+			      str, PPS(pps), DROP(drop), ERR(err));
+	}
+
+	if (out) {
+		pps = calc_pps(&rec->total, &prev->total, t);
+		drop = calc_drop_pps(&rec->total, &prev->total, t);
+		err = calc_errs_pps(&rec->total, &prev->total, t);
+
+		out->rx_cnt.pps = pps;
+		out->rx_cnt.drop = drop;
+		out->rx_cnt.err = err;
+		out->totals.rx += pps;
+		out->totals.drop += drop;
+		out->totals.err += err;
+	}
+}
+
+static void stats_get_cpumap_enqueue(struct stats_record *stats_rec,
+				     struct stats_record *stats_prev,
+				     unsigned int nr_cpus)
+{
+	struct record *rec, *prev;
+	double t, pps, drop, err;
+	int i, to_cpu;
+
+	/* cpumap enqueue stats */
+	for (to_cpu = 0; to_cpu < sample_n_cpus; to_cpu++) {
+		rec = &stats_rec->enq[to_cpu];
+		prev = &stats_prev->enq[to_cpu];
+		t = calc_period(rec, prev);
+
+		pps = calc_pps(&rec->total, &prev->total, t);
+		drop = calc_drop_pps(&rec->total, &prev->total, t);
+		err = calc_errs_pps(&rec->total, &prev->total, t);
+
+		if (pps > 0 || drop > 0) {
+			char str[64];
+
+			snprintf(str, sizeof(str), "enqueue to cpu %d", to_cpu);
+
+			if (err > 0)
+				err = pps / err; /* calc average bulk size */
+
+			print_err(drop,
+				  "  %-20s " FMT_COLUMNf FMT_COLUMNf __COLUMN(
+					  ".2f") "\n",
+				  str, PPS(pps), DROP(drop), err, "bulk-avg");
+		}
+
+		for (i = 0; i < nr_cpus; i++) {
+			struct datarec *r = &rec->cpu[i];
+			struct datarec *p = &prev->cpu[i];
+			char str[64];
+
+			pps = calc_pps(r, p, t);
+			drop = calc_drop_pps(r, p, t);
+			err = calc_errs_pps(r, p, t);
+			if (!pps && !drop && !err)
+				continue;
+
+			snprintf(str, sizeof(str), "cpu:%d->%d", i, to_cpu);
+			if (err > 0)
+				err = pps / err; /* calc average bulk size */
+			print_default(
+				"    %-18s " FMT_COLUMNf FMT_COLUMNf __COLUMN(
+					".2f") "\n",
+				str, PPS(pps), DROP(drop), err, "bulk-avg");
+		}
+	}
+}
+
+static void stats_get_cpumap_remote(struct stats_record *stats_rec,
+				    struct stats_record *stats_prev,
+				    unsigned int nr_cpus)
+{
+	double xdp_pass, xdp_drop, xdp_redirect;
+	struct record *rec, *prev;
+	double t;
+	int i;
+
+	rec = &stats_rec->kthread;
+	prev = &stats_prev->kthread;
+	t = calc_period(rec, prev);
+
+	calc_xdp_pps(&rec->total, &prev->total, &xdp_pass, &xdp_drop,
+		     &xdp_redirect, t);
+	if (xdp_pass || xdp_drop || xdp_redirect) {
+		print_err(xdp_drop,
+			  "    %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf "\n",
+			  "xdp_stats", PASS(xdp_pass), DROP(xdp_drop),
+			  REDIR(xdp_redirect));
+	}
+
+	for (i = 0; i < nr_cpus; i++) {
+		struct datarec *r = &rec->cpu[i];
+		struct datarec *p = &prev->cpu[i];
+		char str[64];
+
+		calc_xdp_pps(r, p, &xdp_pass, &xdp_drop, &xdp_redirect, t);
+		if (!xdp_pass && !xdp_drop && !xdp_redirect)
+			continue;
+
+		snprintf(str, sizeof(str), "cpu:%d", i);
+		print_default("      %-16s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf
+			      "\n",
+			      str, PASS(xdp_pass), DROP(xdp_drop),
+			      REDIR(xdp_redirect));
+	}
+}
+
+static void stats_get_cpumap_kthread(struct stats_record *stats_rec,
+				     struct stats_record *stats_prev,
+				     unsigned int nr_cpus)
+{
+	struct record *rec, *prev;
+	double t, pps, drop, err;
+	int i;
+
+	rec = &stats_rec->kthread;
+	prev = &stats_prev->kthread;
+	t = calc_period(rec, prev);
+
+	pps = calc_pps(&rec->total, &prev->total, t);
+	drop = calc_drop_pps(&rec->total, &prev->total, t);
+	err = calc_errs_pps(&rec->total, &prev->total, t);
+
+	print_err(drop, "  %-20s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf "\n",
+		  pps ? "kthread total" : "kthread", PPS(pps), DROP(drop), err,
+		  "sched");
+
+	for (i = 0; i < nr_cpus; i++) {
+		struct datarec *r = &rec->cpu[i];
+		struct datarec *p = &prev->cpu[i];
+		char str[64];
+
+		pps = calc_pps(r, p, t);
+		drop = calc_drop_pps(r, p, t);
+		err = calc_errs_pps(r, p, t);
+		if (!pps && !drop && !err)
+			continue;
+
+		snprintf(str, sizeof(str), "cpu:%d", i);
+		print_default("    %-18s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf
+			      "\n",
+			      str, PPS(pps), DROP(drop), err, "sched");
+	}
+}
+
+static void stats_get_redirect_cnt(struct stats_record *stats_rec,
+				   struct stats_record *stats_prev,
+				   unsigned int nr_cpus,
+				   struct sample_output *out)
+{
+	struct record *rec, *prev;
+	double t, pps;
+	int i;
+
+	rec = &stats_rec->redir_err[0];
+	prev = &stats_prev->redir_err[0];
+	t = calc_period(rec, prev);
+	for (i = 0; i < nr_cpus; i++) {
+		struct datarec *r = &rec->cpu[i];
+		struct datarec *p = &prev->cpu[i];
+		char str[64];
+
+		pps = calc_pps(r, p, t);
+		if (!pps)
+			continue;
+
+		snprintf(str, sizeof(str), "cpu:%d", i);
+		print_default("    %-18s " FMT_COLUMNf "\n", str, REDIR(pps));
+	}
+
+	if (out) {
+		pps = calc_pps(&rec->total, &prev->total, t);
+		out->redir_cnt.suc = pps;
+		out->totals.redir += pps;
+	}
+}
+
+static void stats_get_redirect_err_cnt(struct stats_record *stats_rec,
+				       struct stats_record *stats_prev,
+				       unsigned int nr_cpus,
+				       struct sample_output *out)
+{
+	struct record *rec, *prev;
+	double t, drop, sum = 0;
+	int rec_i, i;
+
+	for (rec_i = 1; rec_i < XDP_REDIRECT_ERR_MAX; rec_i++) {
+		char str[64];
+
+		rec = &stats_rec->redir_err[rec_i];
+		prev = &stats_prev->redir_err[rec_i];
+		t = calc_period(rec, prev);
+
+		drop = calc_drop_pps(&rec->total, &prev->total, t);
+		if (drop > 0 && !out) {
+			snprintf(str, sizeof(str),
+				 sample_log_level & LL_DEFAULT ? "%s total" :
+								       "%s",
+				 xdp_redirect_err_names[rec_i]);
+			print_err(drop, "    %-18s " FMT_COLUMNf "\n", str,
+				  ERR(drop));
+		}
+
+		for (i = 0; i < nr_cpus; i++) {
+			struct datarec *r = &rec->cpu[i];
+			struct datarec *p = &prev->cpu[i];
+			double drop;
+
+			drop = calc_drop_pps(r, p, t);
+			if (!drop)
+				continue;
+
+			snprintf(str, sizeof(str), "cpu:%d", i);
+			print_default("       %-16s" FMT_COLUMNf "\n", str,
+				      ERR(drop));
+		}
+
+		sum += drop;
+	}
+
+	if (out) {
+		out->redir_cnt.err = sum;
+		out->totals.err += sum;
+	}
+}
+
+static void stats_get_exception_cnt(struct stats_record *stats_rec,
+				    struct stats_record *stats_prev,
+				    unsigned int nr_cpus,
+				    struct sample_output *out)
+{
+	double t, drop, sum = 0;
+	struct record *rec, *prev;
+	int rec_i, i;
+
+	for (rec_i = 0; rec_i < XDP_ACTION_MAX; rec_i++) {
+		rec = &stats_rec->exception[rec_i];
+		prev = &stats_prev->exception[rec_i];
+		t = calc_period(rec, prev);
+
+		drop = calc_drop_pps(&rec->total, &prev->total, t);
+		/* Fold out errors after heading */
+		sum += drop;
+
+		if (drop > 0 && !out) {
+			print_always("    %-18s " FMT_COLUMNf "\n",
+				     action2str(rec_i), ERR(drop));
+
+			for (i = 0; i < nr_cpus; i++) {
+				struct datarec *r = &rec->cpu[i];
+				struct datarec *p = &prev->cpu[i];
+				char str[64];
+				double drop;
+
+				drop = calc_drop_pps(r, p, t);
+				if (!drop)
+					continue;
+
+				snprintf(str, sizeof(str), "cpu:%d", i);
+				print_default("       %-16s" FMT_COLUMNf "\n",
+					      str, ERR(drop));
+			}
+		}
+	}
+
+	if (out) {
+		out->except_cnt.hits = sum;
+		out->totals.err += sum;
+	}
+}
+
+static void stats_get_devmap_xmit(struct stats_record *stats_rec,
+				  struct stats_record *stats_prev,
+				  unsigned int nr_cpus,
+				  struct sample_output *out)
+{
+	double pps, drop, info, err;
+	struct record *rec, *prev;
+	double t;
+	int i;
+
+	rec = &stats_rec->devmap_xmit;
+	prev = &stats_prev->devmap_xmit;
+	t = calc_period(rec, prev);
+	for (i = 0; i < nr_cpus; i++) {
+		struct datarec *r = &rec->cpu[i];
+		struct datarec *p = &prev->cpu[i];
+		char str[64];
+
+		pps = calc_pps(r, p, t);
+		drop = calc_drop_pps(r, p, t);
+		err = calc_errs_pps(r, p, t);
+
+		if (!pps && !drop && !err)
+			continue;
+
+		snprintf(str, sizeof(str), "cpu:%d", i);
+		info = calc_info_pps(r, p, t);
+		if (info > 0)
+			info = (pps + drop) / info; /* calc avg bulk */
+		print_default("     %-18s" FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf
+				      __COLUMN(".2f") "\n",
+			      str, XMIT(pps), DROP(drop), err, "drv_err/s",
+			      info, "bulk-avg");
+	}
+	if (out) {
+		pps = calc_pps(&rec->total, &prev->total, t);
+		drop = calc_drop_pps(&rec->total, &prev->total, t);
+		info = calc_info_pps(&rec->total, &prev->total, t);
+		if (info > 0)
+			info = (pps + drop) / info; /* calc avg bulk */
+		err = calc_errs_pps(&rec->total, &prev->total, t);
+
+		out->xmit_cnt.pps = pps;
+		out->xmit_cnt.drop = drop;
+		out->xmit_cnt.bavg = info;
+		out->xmit_cnt.err = err;
+		out->totals.xmit += pps;
+		out->totals.drop_xmit += drop;
+		out->totals.err += err;
+	}
+}
+
+static void stats_get_devmap_xmit_multi(struct stats_record *stats_rec,
+					struct stats_record *stats_prev,
+					unsigned int nr_cpus,
+					struct sample_output *out,
+					bool xmit_total)
+{
+	double pps, drop, info, err;
+	struct map_entry *entry;
+	struct record *r, *p;
+	double t;
+	int bkt;
+
+	hash_for_each(stats_rec->xmit_map, bkt, entry, node) {
+		struct map_entry *e, *x = NULL;
+		char ifname_from[IFNAMSIZ];
+		char ifname_to[IFNAMSIZ];
+		const char *fstr, *tstr;
+		unsigned long prev_time;
+		struct record beg = {};
+		__u32 from_idx, to_idx;
+		char str[128];
+		__u64 pair;
+		int i;
+
+		prev_time = sample_interval * NANOSEC_PER_SEC;
+
+		pair = entry->pair;
+		from_idx = pair >> 32;
+		to_idx = pair & 0xFFFFFFFF;
+
+		r = &entry->val;
+		beg.timestamp = r->timestamp - prev_time;
+
+		/* Find matching entry from stats_prev map */
+		hash_for_each_possible(stats_prev->xmit_map, e, node, pair) {
+			if (e->pair == pair) {
+				x = e;
+				break;
+			}
+		}
+		if (x)
+			p = &x->val;
+		else
+			p = &beg;
+		t = calc_period(r, p);
+		pps = calc_pps(&r->total, &p->total, t);
+		drop = calc_drop_pps(&r->total, &p->total, t);
+		info = calc_info_pps(&r->total, &p->total, t);
+		if (info > 0)
+			info = (pps + drop) / info; /* calc avg bulk */
+		err = calc_errs_pps(&r->total, &p->total, t);
+
+		if (out) {
+			/* We are responsible for filling out totals */
+			out->totals.xmit += pps;
+			out->totals.drop_xmit += drop;
+			out->totals.err += err;
+			continue;
+		}
+
+		fstr = tstr = NULL;
+		if (if_indextoname(from_idx, ifname_from))
+			fstr = ifname_from;
+		if (if_indextoname(to_idx, ifname_to))
+			tstr = ifname_to;
+
+		snprintf(str, sizeof(str), "xmit %s->%s", fstr ?: "?",
+			 tstr ?: "?");
+		/* Skip idle streams of redirection */
+		if (pps || drop || err) {
+			print_err(drop,
+				  "  %-20s " FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf
+				  __COLUMN(".2f") "\n", str, XMIT(pps), DROP(drop),
+				  err, "drv_err/s", info, "bulk-avg");
+		}
+
+		for (i = 0; i < nr_cpus; i++) {
+			struct datarec *rc = &r->cpu[i];
+			struct datarec *pc, p_beg = {};
+			char str[64];
+
+			pc = p == &beg ? &p_beg : &p->cpu[i];
+
+			pps = calc_pps(rc, pc, t);
+			drop = calc_drop_pps(rc, pc, t);
+			err = calc_errs_pps(rc, pc, t);
+
+			if (!pps && !drop && !err)
+				continue;
+
+			snprintf(str, sizeof(str), "cpu:%d", i);
+			info = calc_info_pps(rc, pc, t);
+			if (info > 0)
+				info = (pps + drop) / info; /* calc avg bulk */
+
+			print_default("     %-18s" FMT_COLUMNf FMT_COLUMNf FMT_COLUMNf
+				      __COLUMN(".2f") "\n", str, XMIT(pps),
+				      DROP(drop), err, "drv_err/s", info, "bulk-avg");
+		}
+	}
+}
+
+static void stats_print(const char *prefix, int mask, struct stats_record *r,
+			struct stats_record *p, struct sample_output *out)
+{
+	int nr_cpus = libbpf_num_possible_cpus();
+	const char *str;
+
+	print_always("%-23s", prefix ?: "Summary");
+	if (mask & SAMPLE_RX_CNT)
+		print_always(FMT_COLUMNl, RX(out->totals.rx));
+	if (mask & SAMPLE_REDIRECT_CNT)
+		print_always(FMT_COLUMNl, REDIR(out->totals.redir));
+	printf(FMT_COLUMNl,
+	       out->totals.err + out->totals.drop + out->totals.drop_xmit,
+	       "err,drop/s");
+	if (mask & SAMPLE_DEVMAP_XMIT_CNT ||
+	    mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI)
+		printf(FMT_COLUMNl, XMIT(out->totals.xmit));
+	printf("\n");
+
+	if (mask & SAMPLE_RX_CNT) {
+		str = (sample_log_level & LL_DEFAULT) && out->rx_cnt.pps ?
+				    "receive total" :
+				    "receive";
+		print_err((out->rx_cnt.err || out->rx_cnt.drop),
+			  "  %-20s " FMT_COLUMNl FMT_COLUMNl FMT_COLUMNl "\n",
+			  str, PPS(out->rx_cnt.pps), DROP(out->rx_cnt.drop),
+			  ERR(out->rx_cnt.err));
+
+		stats_get_rx_cnt(r, p, nr_cpus, NULL);
+	}
+
+	if (mask & SAMPLE_CPUMAP_ENQUEUE_CNT)
+		stats_get_cpumap_enqueue(r, p, nr_cpus);
+
+	if (mask & SAMPLE_CPUMAP_KTHREAD_CNT) {
+		stats_get_cpumap_kthread(r, p, nr_cpus);
+		stats_get_cpumap_remote(r, p, nr_cpus);
+	}
+
+	if (mask & SAMPLE_REDIRECT_CNT) {
+		str = out->redir_cnt.suc ? "redirect total" : "redirect";
+		print_default("  %-20s " FMT_COLUMNl "\n", str,
+			      REDIR(out->redir_cnt.suc));
+
+		stats_get_redirect_cnt(r, p, nr_cpus, NULL);
+	}
+
+	if (mask & SAMPLE_REDIRECT_ERR_CNT) {
+		str = (sample_log_level & LL_DEFAULT) && out->redir_cnt.err ?
+				    "redirect_err total" :
+				    "redirect_err";
+		print_err(out->redir_cnt.err, "  %-20s " FMT_COLUMNl "\n", str,
+			  ERR(out->redir_cnt.err));
+
+		stats_get_redirect_err_cnt(r, p, nr_cpus, NULL);
+	}
+
+	if (mask & SAMPLE_EXCEPTION_CNT) {
+		str = out->except_cnt.hits ? "xdp_exception total" :
+						   "xdp_exception";
+
+		print_err(out->except_cnt.hits, "  %-20s " FMT_COLUMNl "\n", str,
+			  HITS(out->except_cnt.hits));
+
+		stats_get_exception_cnt(r, p, nr_cpus, NULL);
+	}
+
+	if (mask & SAMPLE_DEVMAP_XMIT_CNT) {
+		str = (sample_log_level & LL_DEFAULT) && out->xmit_cnt.pps ?
+				    "devmap_xmit total" :
+				    "devmap_xmit";
+
+		print_err(out->xmit_cnt.err || out->xmit_cnt.drop,
+			  "  %-20s " FMT_COLUMNl FMT_COLUMNl FMT_COLUMNl
+				  __COLUMN(".2f") "\n",
+			  str, XMIT(out->xmit_cnt.pps),
+			  DROP(out->xmit_cnt.drop), out->xmit_cnt.err,
+			  "drv_err/s", out->xmit_cnt.bavg, "bulk-avg");
+
+		stats_get_devmap_xmit(r, p, nr_cpus, NULL);
+	}
+
+	if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI)
+		stats_get_devmap_xmit_multi(r, p, nr_cpus, NULL,
+					    mask & SAMPLE_DEVMAP_XMIT_CNT);
+
+	if (sample_log_level & LL_DEFAULT ||
+	    ((sample_log_level & LL_SIMPLE) && sample_err_exp)) {
+		sample_err_exp = false;
+		printf("\n");
+	}
+}
+
+int sample_setup_maps(struct bpf_map **maps)
+{
+	sample_n_cpus = libbpf_num_possible_cpus();
+
+	for (int i = 0; i < MAP_DEVMAP_XMIT_MULTI; i++) {
+		sample_map[i] = maps[i];
+
+		switch (i) {
+		case MAP_RX:
+		case MAP_CPUMAP_KTHREAD:
+		case MAP_DEVMAP_XMIT:
+			sample_map_count[i] = sample_n_cpus;
+			break;
+		case MAP_REDIRECT_ERR:
+			sample_map_count[i] =
+				XDP_REDIRECT_ERR_MAX * sample_n_cpus;
+			break;
+		case MAP_EXCEPTION:
+			sample_map_count[i] = XDP_ACTION_MAX * sample_n_cpus;
+		case MAP_CPUMAP_ENQUEUE:
+			sample_map_count[i] = sample_n_cpus * sample_n_cpus;
+			break;
+		default:
+			return -EINVAL;
+		}
+		if (bpf_map__set_max_entries(sample_map[i], sample_map_count[i]) < 0)
+			return -errno;
+	}
+	sample_map[MAP_DEVMAP_XMIT_MULTI] = maps[MAP_DEVMAP_XMIT_MULTI];
+	return 0;
+}
+
+static int sample_setup_maps_mappings(void)
+{
+	for (int i = 0; i < MAP_DEVMAP_XMIT_MULTI; i++) {
+		size_t size = sample_map_count[i] * sizeof(struct datarec);
+
+		sample_mmap[i] = mmap(NULL, size, PROT_READ | PROT_WRITE,
+				      MAP_SHARED, bpf_map__fd(sample_map[i]), 0);
+		if (sample_mmap[i] == MAP_FAILED)
+			return -errno;
+	}
+	return 0;
+}
+
+int __sample_init(int mask)
+{
+	sigset_t st;
+
+	sigemptyset(&st);
+	sigaddset(&st, SIGQUIT);
+	sigaddset(&st, SIGINT);
+	sigaddset(&st, SIGTERM);
+
+	if (sigprocmask(SIG_BLOCK, &st, NULL) < 0)
+		return -errno;
+
+	sample_sig_fd = signalfd(-1, &st, SFD_CLOEXEC | SFD_NONBLOCK);
+	if (sample_sig_fd < 0)
+		return -errno;
+
+	sample_mask = mask;
+
+	return sample_setup_maps_mappings();
+}
+
+static int __sample_remove_xdp(int ifindex, __u32 prog_id, int xdp_flags)
+{
+	__u32 cur_prog_id = 0;
+	int ret;
+
+	if (prog_id) {
+		ret = bpf_xdp_query_id(ifindex, xdp_flags, &cur_prog_id);
+		if (ret < 0)
+			return -errno;
+
+		if (prog_id != cur_prog_id) {
+			print_always(
+				"Program on ifindex %d does not match installed "
+				"program, skipping unload\n",
+				ifindex);
+			return -ENOENT;
+		}
+	}
+
+	return bpf_xdp_detach(ifindex, xdp_flags, NULL);
+}
+
+int sample_install_xdp(struct bpf_program *xdp_prog, int ifindex, bool generic,
+		       bool force)
+{
+	int ret, xdp_flags = 0;
+	__u32 prog_id = 0;
+
+	if (sample_xdp_cnt == 32) {
+		fprintf(stderr,
+			"Total limit for installed XDP programs in a sample reached\n");
+		return -ENOTSUP;
+	}
+
+	xdp_flags |= !force ? XDP_FLAGS_UPDATE_IF_NOEXIST : 0;
+	xdp_flags |= generic ? XDP_FLAGS_SKB_MODE : XDP_FLAGS_DRV_MODE;
+	ret = bpf_xdp_attach(ifindex, bpf_program__fd(xdp_prog), xdp_flags, NULL);
+	if (ret < 0) {
+		ret = -errno;
+		fprintf(stderr,
+			"Failed to install program \"%s\" on ifindex %d, mode = %s, "
+			"force = %s: %s\n",
+			bpf_program__name(xdp_prog), ifindex,
+			generic ? "skb" : "native", force ? "true" : "false",
+			strerror(-ret));
+		return ret;
+	}
+
+	ret = bpf_xdp_query_id(ifindex, xdp_flags, &prog_id);
+	if (ret < 0) {
+		ret = -errno;
+		fprintf(stderr,
+			"Failed to get XDP program id for ifindex %d, removing program: %s\n",
+			ifindex, strerror(errno));
+		__sample_remove_xdp(ifindex, 0, xdp_flags);
+		return ret;
+	}
+	sample_xdp_progs[sample_xdp_cnt++] =
+		(struct xdp_desc){ ifindex, prog_id, xdp_flags };
+
+	return 0;
+}
+
+static void sample_summary_print(void)
+{
+	double num = sample_out.rx_cnt.num;
+
+	if (sample_out.totals.rx) {
+		double pkts = sample_out.totals.rx;
+
+		print_always("  Packets received    : %'-10llu\n",
+			     sample_out.totals.rx);
+		print_always("  Average packets/s   : %'-10.0f\n",
+			     sample_round(pkts / num));
+	}
+	if (sample_out.totals.redir) {
+		double pkts = sample_out.totals.redir;
+
+		print_always("  Packets redirected  : %'-10llu\n",
+			     sample_out.totals.redir);
+		print_always("  Average redir/s     : %'-10.0f\n",
+			     sample_round(pkts / num));
+	}
+	if (sample_out.totals.drop)
+		print_always("  Rx dropped          : %'-10llu\n",
+			     sample_out.totals.drop);
+	if (sample_out.totals.drop_xmit)
+		print_always("  Tx dropped          : %'-10llu\n",
+			     sample_out.totals.drop_xmit);
+	if (sample_out.totals.err)
+		print_always("  Errors recorded     : %'-10llu\n",
+			     sample_out.totals.err);
+	if (sample_out.totals.xmit) {
+		double pkts = sample_out.totals.xmit;
+
+		print_always("  Packets transmitted : %'-10llu\n",
+			     sample_out.totals.xmit);
+		print_always("  Average transmit/s  : %'-10.0f\n",
+			     sample_round(pkts / num));
+	}
+}
+
+void sample_exit(int status)
+{
+	size_t size;
+
+	for (int i = 0; i < NUM_MAP; i++) {
+		size = sample_map_count[i] * sizeof(**sample_mmap);
+		munmap(sample_mmap[i], size);
+	}
+	while (sample_xdp_cnt--) {
+		int i = sample_xdp_cnt, ifindex, xdp_flags;
+		__u32 prog_id;
+
+		prog_id = sample_xdp_progs[i].prog_id;
+		ifindex = sample_xdp_progs[i].ifindex;
+		xdp_flags = sample_xdp_progs[i].flags;
+
+		__sample_remove_xdp(ifindex, prog_id, xdp_flags);
+	}
+	sample_summary_print();
+	close(sample_sig_fd);
+	exit(status);
+}
+
+static int sample_stats_collect(struct stats_record *rec)
+{
+	int i;
+
+	if (sample_mask & SAMPLE_RX_CNT)
+		map_collect_percpu(sample_mmap[MAP_RX], &rec->rx_cnt);
+
+	if (sample_mask & SAMPLE_REDIRECT_CNT)
+		map_collect_percpu(sample_mmap[MAP_REDIRECT_ERR], &rec->redir_err[0]);
+
+	if (sample_mask & SAMPLE_REDIRECT_ERR_CNT) {
+		for (i = 1; i < XDP_REDIRECT_ERR_MAX; i++)
+			map_collect_percpu(&sample_mmap[MAP_REDIRECT_ERR][i * sample_n_cpus],
+					   &rec->redir_err[i]);
+	}
+
+	if (sample_mask & SAMPLE_CPUMAP_ENQUEUE_CNT)
+		for (i = 0; i < sample_n_cpus; i++)
+			map_collect_percpu(&sample_mmap[MAP_CPUMAP_ENQUEUE][i * sample_n_cpus],
+					   &rec->enq[i]);
+
+	if (sample_mask & SAMPLE_CPUMAP_KTHREAD_CNT)
+		map_collect_percpu(sample_mmap[MAP_CPUMAP_KTHREAD],
+				   &rec->kthread);
+
+	if (sample_mask & SAMPLE_EXCEPTION_CNT)
+		for (i = 0; i < XDP_ACTION_MAX; i++)
+			map_collect_percpu(&sample_mmap[MAP_EXCEPTION][i * sample_n_cpus],
+					   &rec->exception[i]);
+
+	if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT)
+		map_collect_percpu(sample_mmap[MAP_DEVMAP_XMIT], &rec->devmap_xmit);
+
+	if (sample_mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI) {
+		if (map_collect_percpu_devmap(bpf_map__fd(sample_map[MAP_DEVMAP_XMIT_MULTI]), rec) < 0)
+			return -EINVAL;
+	}
+	return 0;
+}
+
+static void sample_summary_update(struct sample_output *out)
+{
+	sample_out.totals.rx += out->totals.rx;
+	sample_out.totals.redir += out->totals.redir;
+	sample_out.totals.drop += out->totals.drop;
+	sample_out.totals.drop_xmit += out->totals.drop_xmit;
+	sample_out.totals.err += out->totals.err;
+	sample_out.totals.xmit += out->totals.xmit;
+	sample_out.rx_cnt.num++;
+}
+
+static void sample_stats_print(int mask, struct stats_record *cur,
+			       struct stats_record *prev, char *prog_name)
+{
+	struct sample_output out = {};
+
+	if (mask & SAMPLE_RX_CNT)
+		stats_get_rx_cnt(cur, prev, 0, &out);
+	if (mask & SAMPLE_REDIRECT_CNT)
+		stats_get_redirect_cnt(cur, prev, 0, &out);
+	if (mask & SAMPLE_REDIRECT_ERR_CNT)
+		stats_get_redirect_err_cnt(cur, prev, 0, &out);
+	if (mask & SAMPLE_EXCEPTION_CNT)
+		stats_get_exception_cnt(cur, prev, 0, &out);
+	if (mask & SAMPLE_DEVMAP_XMIT_CNT)
+		stats_get_devmap_xmit(cur, prev, 0, &out);
+	else if (mask & SAMPLE_DEVMAP_XMIT_CNT_MULTI)
+		stats_get_devmap_xmit_multi(cur, prev, 0, &out,
+					    mask & SAMPLE_DEVMAP_XMIT_CNT);
+	sample_summary_update(&out);
+
+	stats_print(prog_name, mask, cur, prev, &out);
+}
+
+void sample_switch_mode(void)
+{
+	sample_log_level ^= LL_DEBUG - 1;
+}
+
+static int sample_signal_cb(void)
+{
+	struct signalfd_siginfo si;
+	int r;
+
+	r = read(sample_sig_fd, &si, sizeof(si));
+	if (r < 0)
+		return -errno;
+
+	switch (si.ssi_signo) {
+	case SIGQUIT:
+		sample_switch_mode();
+		printf("\n");
+		break;
+	default:
+		printf("\n");
+		return 1;
+	}
+
+	return 0;
+}
+
+/* Pointer swap trick */
+static void swap(struct stats_record **a, struct stats_record **b)
+{
+	struct stats_record *tmp;
+
+	tmp = *a;
+	*a = *b;
+	*b = tmp;
+}
+
+static int sample_timer_cb(int timerfd, struct stats_record **rec,
+			   struct stats_record **prev)
+{
+	char line[64] = "Summary";
+	int ret;
+	__u64 t;
+
+	ret = read(timerfd, &t, sizeof(t));
+	if (ret < 0)
+		return -errno;
+
+	swap(prev, rec);
+	ret = sample_stats_collect(*rec);
+	if (ret < 0)
+		return ret;
+
+	if (sample_xdp_cnt == 2 && !(sample_mask & SAMPLE_SKIP_HEADING)) {
+		char fi[IFNAMSIZ];
+		char to[IFNAMSIZ];
+		const char *f, *t;
+
+		f = t = NULL;
+		if (if_indextoname(sample_xdp_progs[0].ifindex, fi))
+			f = fi;
+		if (if_indextoname(sample_xdp_progs[1].ifindex, to))
+			t = to;
+
+		snprintf(line, sizeof(line), "%s->%s", f ?: "?", t ?: "?");
+	}
+
+	sample_stats_print(sample_mask, *rec, *prev, line);
+	return 0;
+}
+
+int sample_run(int interval, void (*post_cb)(void *), void *ctx)
+{
+	struct timespec ts = { interval, 0 };
+	struct itimerspec its = { ts, ts };
+	struct stats_record *rec, *prev;
+	struct pollfd pfd[2] = {};
+	int timerfd, ret;
+
+	if (!interval) {
+		fprintf(stderr, "Incorrect interval 0\n");
+		return -EINVAL;
+	}
+	sample_interval = interval;
+	/* Pretty print numbers */
+	setlocale(LC_NUMERIC, "en_US.UTF-8");
+
+	timerfd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC | TFD_NONBLOCK);
+	if (timerfd < 0)
+		return -errno;
+	timerfd_settime(timerfd, 0, &its, NULL);
+
+	pfd[0].fd = sample_sig_fd;
+	pfd[0].events = POLLIN;
+
+	pfd[1].fd = timerfd;
+	pfd[1].events = POLLIN;
+
+	ret = -ENOMEM;
+	rec = alloc_stats_record();
+	if (!rec)
+		goto end;
+	prev = alloc_stats_record();
+	if (!prev)
+		goto end_rec;
+
+	ret = sample_stats_collect(rec);
+	if (ret < 0)
+		goto end_rec_prev;
+
+	for (;;) {
+		ret = poll(pfd, 2, -1);
+		if (ret < 0) {
+			if (errno == EINTR)
+				continue;
+			else
+				break;
+		}
+
+		if (pfd[0].revents & POLLIN)
+			ret = sample_signal_cb();
+		else if (pfd[1].revents & POLLIN)
+			ret = sample_timer_cb(timerfd, &rec, &prev);
+
+		if (ret)
+			break;
+
+		if (post_cb)
+			post_cb(ctx);
+	}
+
+end_rec_prev:
+	free_stats_record(prev);
+end_rec:
+	free_stats_record(rec);
+end:
+	close(timerfd);
+
+	return ret;
+}
+
+const char *get_driver_name(int ifindex)
+{
+	struct ethtool_drvinfo drv = {};
+	char ifname[IF_NAMESIZE];
+	static char drvname[32];
+	struct ifreq ifr = {};
+	int fd, r = 0;
+
+	fd = socket(AF_INET, SOCK_DGRAM, 0);
+	if (fd < 0)
+		return "[error]";
+
+	if (!if_indextoname(ifindex, ifname))
+		goto end;
+
+	drv.cmd = ETHTOOL_GDRVINFO;
+	safe_strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+	ifr.ifr_data = (void *)&drv;
+
+	r = ioctl(fd, SIOCETHTOOL, &ifr);
+	if (r)
+		goto end;
+
+	safe_strncpy(drvname, drv.driver, sizeof(drvname));
+
+	close(fd);
+	return drvname;
+
+end:
+	r = errno;
+	close(fd);
+	return r == EOPNOTSUPP ? "loopback" : "[error]";
+}
+
+int get_mac_addr(int ifindex, void *mac_addr)
+{
+	char ifname[IF_NAMESIZE];
+	struct ifreq ifr = {};
+	int fd, r;
+
+	fd = socket(AF_INET, SOCK_DGRAM, 0);
+	if (fd < 0)
+		return -errno;
+
+	if (!if_indextoname(ifindex, ifname)) {
+		r = -errno;
+		goto end;
+	}
+
+	safe_strncpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+
+	r = ioctl(fd, SIOCGIFHWADDR, &ifr);
+	if (r) {
+		r = -errno;
+		goto end;
+	}
+
+	memcpy(mac_addr, ifr.ifr_hwaddr.sa_data, 6 * sizeof(char));
+
+end:
+	close(fd);
+	return r;
+}
+
+__attribute__((constructor)) static void sample_ctor(void)
+{
+	if (libbpf_set_strict_mode(LIBBPF_STRICT_ALL) < 0) {
+		fprintf(stderr, "Failed to set libbpf strict mode: %s\n",
+			strerror(errno));
+		/* Just exit, nothing to cleanup right now */
+		exit(EXIT_FAIL_BPF);
+	}
+}