+++ /dev/null
-// 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 *)ð->ether_shost;
- struct ether_addr *dst_addr = (struct ether_addr *)ð->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;
-}
+++ /dev/null
-// 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,
- ¶ms->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 *)ð->ether_shost;
- struct ether_addr *dst_addr = (struct ether_addr *)ð->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;
-}
projects / users / hch / dma-mapping.git / commitdiff