862 lines
20 KiB
C
862 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright(c) 2017 - 2018 Intel Corporation. */
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#include <asm/barrier.h>
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#include <errno.h>
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#include <getopt.h>
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#include <libgen.h>
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#include <linux/bpf.h>
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#include <linux/compiler.h>
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#include <linux/if_link.h>
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#include <linux/if_xdp.h>
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#include <linux/if_ether.h>
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#include <locale.h>
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#include <net/ethernet.h>
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#include <net/if.h>
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#include <poll.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/resource.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include "libbpf.h"
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#include "xsk.h"
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#include "xdpsock.h"
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#include <bpf/bpf.h>
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#ifndef SOL_XDP
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#define SOL_XDP 283
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#endif
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#ifndef AF_XDP
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#define AF_XDP 44
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#endif
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#ifndef PF_XDP
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#define PF_XDP AF_XDP
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#endif
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#define NUM_FRAMES (4 * 1024)
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#define BATCH_SIZE 64
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#define DEBUG_HEXDUMP 0
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typedef __u64 u64;
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typedef __u32 u32;
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static unsigned long prev_time;
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enum benchmark_type {
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BENCH_RXDROP = 0,
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BENCH_TXONLY = 1,
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BENCH_L2FWD = 2,
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};
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static enum benchmark_type opt_bench = BENCH_RXDROP;
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static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
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static const char *opt_if = "";
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static int opt_ifindex;
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static int opt_queue;
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static int opt_poll;
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static int opt_interval = 1;
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static u32 opt_xdp_bind_flags = XDP_USE_NEED_WAKEUP;
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static u32 opt_umem_flags;
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static int opt_unaligned_chunks;
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static int opt_mmap_flags;
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static u32 opt_xdp_bind_flags;
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static int opt_xsk_frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE;
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static int opt_timeout = 1000;
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static bool opt_need_wakeup = true;
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static u32 opt_num_xsks = 1;
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static u32 prog_id;
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struct xsk_umem_info {
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struct xsk_ring_prod fq;
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struct xsk_ring_cons cq;
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struct xsk_umem *umem;
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void *buffer;
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};
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struct xsk_socket_info {
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struct xsk_ring_cons rx;
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struct xsk_ring_prod tx;
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struct xsk_umem_info *umem;
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struct xsk_socket *xsk;
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unsigned long rx_npkts;
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unsigned long tx_npkts;
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unsigned long prev_rx_npkts;
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unsigned long prev_tx_npkts;
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u32 outstanding_tx;
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};
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static int num_socks;
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struct xsk_socket_info *xsks[MAX_SOCKS];
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static unsigned long get_nsecs(void)
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec * 1000000000UL + ts.tv_nsec;
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}
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static void print_benchmark(bool running)
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{
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const char *bench_str = "INVALID";
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if (opt_bench == BENCH_RXDROP)
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bench_str = "rxdrop";
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else if (opt_bench == BENCH_TXONLY)
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bench_str = "txonly";
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else if (opt_bench == BENCH_L2FWD)
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bench_str = "l2fwd";
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printf("%s:%d %s ", opt_if, opt_queue, bench_str);
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if (opt_xdp_flags & XDP_FLAGS_SKB_MODE)
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printf("xdp-skb ");
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else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE)
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printf("xdp-drv ");
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else
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printf(" ");
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if (opt_poll)
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printf("poll() ");
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if (running) {
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printf("running...");
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fflush(stdout);
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}
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}
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static void dump_stats(void)
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{
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unsigned long now = get_nsecs();
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long dt = now - prev_time;
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int i;
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prev_time = now;
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for (i = 0; i < num_socks && xsks[i]; i++) {
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char *fmt = "%-15s %'-11.0f %'-11lu\n";
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double rx_pps, tx_pps;
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rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) *
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1000000000. / dt;
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tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) *
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1000000000. / dt;
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printf("\n sock%d@", i);
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print_benchmark(false);
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printf("\n");
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printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts",
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dt / 1000000000.);
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printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts);
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printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts);
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xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts;
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xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts;
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}
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}
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static void *poller(void *arg)
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{
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(void)arg;
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for (;;) {
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sleep(opt_interval);
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dump_stats();
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}
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return NULL;
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}
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static void remove_xdp_program(void)
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{
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u32 curr_prog_id = 0;
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if (bpf_get_link_xdp_id(opt_ifindex, &curr_prog_id, opt_xdp_flags)) {
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printf("bpf_get_link_xdp_id failed\n");
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exit(EXIT_FAILURE);
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}
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if (prog_id == curr_prog_id)
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bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags);
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else if (!curr_prog_id)
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printf("couldn't find a prog id on a given interface\n");
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else
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printf("program on interface changed, not removing\n");
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}
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static void int_exit(int sig)
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{
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struct xsk_umem *umem = xsks[0]->umem->umem;
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int i;
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dump_stats();
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for (i = 0; i < num_socks; i++)
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xsk_socket__delete(xsks[i]->xsk);
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(void)xsk_umem__delete(umem);
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remove_xdp_program();
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exit(EXIT_SUCCESS);
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}
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static void __exit_with_error(int error, const char *file, const char *func,
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int line)
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{
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fprintf(stderr, "%s:%s:%i: errno: %d/\"%s\"\n", file, func,
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line, error, strerror(error));
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dump_stats();
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remove_xdp_program();
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exit(EXIT_FAILURE);
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}
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#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, \
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__LINE__)
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static const char pkt_data[] =
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"\x3c\xfd\xfe\x9e\x7f\x71\xec\xb1\xd7\x98\x3a\xc0\x08\x00\x45\x00"
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"\x00\x2e\x00\x00\x00\x00\x40\x11\x88\x97\x05\x08\x07\x08\xc8\x14"
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"\x1e\x04\x10\x92\x10\x92\x00\x1a\x6d\xa3\x34\x33\x1f\x69\x40\x6b"
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"\x54\x59\xb6\x14\x2d\x11\x44\xbf\xaf\xd9\xbe\xaa";
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static void swap_mac_addresses(void *data)
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{
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struct ether_header *eth = (struct ether_header *)data;
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struct ether_addr *src_addr = (struct ether_addr *)ð->ether_shost;
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struct ether_addr *dst_addr = (struct ether_addr *)ð->ether_dhost;
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struct ether_addr tmp;
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tmp = *src_addr;
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*src_addr = *dst_addr;
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*dst_addr = tmp;
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}
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static void hex_dump(void *pkt, size_t length, u64 addr)
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{
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const unsigned char *address = (unsigned char *)pkt;
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const unsigned char *line = address;
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size_t line_size = 32;
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unsigned char c;
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char buf[32];
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int i = 0;
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if (!DEBUG_HEXDUMP)
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return;
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sprintf(buf, "addr=%llu", addr);
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printf("length = %zu\n", length);
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printf("%s | ", buf);
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while (length-- > 0) {
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printf("%02X ", *address++);
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if (!(++i % line_size) || (length == 0 && i % line_size)) {
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if (length == 0) {
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while (i++ % line_size)
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printf("__ ");
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}
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printf(" | "); /* right close */
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while (line < address) {
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c = *line++;
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printf("%c", (c < 33 || c == 255) ? 0x2E : c);
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}
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printf("\n");
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if (length > 0)
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printf("%s | ", buf);
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}
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}
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printf("\n");
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}
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static size_t gen_eth_frame(struct xsk_umem_info *umem, u64 addr)
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{
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memcpy(xsk_umem__get_data(umem->buffer, addr), pkt_data,
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sizeof(pkt_data) - 1);
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return sizeof(pkt_data) - 1;
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}
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static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size)
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{
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struct xsk_umem_info *umem;
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struct xsk_umem_config cfg = {
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.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
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.comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
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.frame_size = opt_xsk_frame_size,
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.frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM,
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.flags = opt_umem_flags
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};
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int ret;
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umem = calloc(1, sizeof(*umem));
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if (!umem)
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exit_with_error(errno);
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ret = xsk_umem__create(&umem->umem, buffer, size, &umem->fq, &umem->cq,
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&cfg);
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if (ret)
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exit_with_error(-ret);
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umem->buffer = buffer;
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return umem;
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}
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static void xsk_populate_fill_ring(struct xsk_umem_info *umem)
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{
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int ret, i;
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u32 idx;
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ret = xsk_ring_prod__reserve(&umem->fq,
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XSK_RING_PROD__DEFAULT_NUM_DESCS, &idx);
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if (ret != XSK_RING_PROD__DEFAULT_NUM_DESCS)
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exit_with_error(-ret);
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for (i = 0; i < XSK_RING_PROD__DEFAULT_NUM_DESCS; i++)
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*xsk_ring_prod__fill_addr(&umem->fq, idx++) =
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i * opt_xsk_frame_size;
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xsk_ring_prod__submit(&umem->fq, XSK_RING_PROD__DEFAULT_NUM_DESCS);
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}
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static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem,
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bool rx, bool tx)
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{
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struct xsk_socket_config cfg;
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struct xsk_socket_info *xsk;
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struct xsk_ring_cons *rxr;
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struct xsk_ring_prod *txr;
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int ret;
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xsk = calloc(1, sizeof(*xsk));
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if (!xsk)
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exit_with_error(errno);
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xsk->umem = umem;
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cfg.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
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cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
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if (opt_num_xsks > 1)
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cfg.libbpf_flags = XSK_LIBBPF_FLAGS__INHIBIT_PROG_LOAD;
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else
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cfg.libbpf_flags = 0;
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cfg.xdp_flags = opt_xdp_flags;
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cfg.bind_flags = opt_xdp_bind_flags;
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rxr = rx ? &xsk->rx : NULL;
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txr = tx ? &xsk->tx : NULL;
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ret = xsk_socket__create(&xsk->xsk, opt_if, opt_queue, umem->umem,
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rxr, txr, &cfg);
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if (ret)
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exit_with_error(-ret);
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ret = bpf_get_link_xdp_id(opt_ifindex, &prog_id, opt_xdp_flags);
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if (ret)
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exit_with_error(-ret);
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return xsk;
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}
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static struct option long_options[] = {
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{"rxdrop", no_argument, 0, 'r'},
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{"txonly", no_argument, 0, 't'},
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{"l2fwd", no_argument, 0, 'l'},
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{"interface", required_argument, 0, 'i'},
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{"queue", required_argument, 0, 'q'},
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{"poll", no_argument, 0, 'p'},
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{"xdp-skb", no_argument, 0, 'S'},
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{"xdp-native", no_argument, 0, 'N'},
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{"interval", required_argument, 0, 'n'},
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{"zero-copy", no_argument, 0, 'z'},
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{"copy", no_argument, 0, 'c'},
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{"frame-size", required_argument, 0, 'f'},
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{"no-need-wakeup", no_argument, 0, 'm'},
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{"unaligned", no_argument, 0, 'u'},
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{"shared-umem", no_argument, 0, 'M'},
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{"force", no_argument, 0, 'F'},
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{0, 0, 0, 0}
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};
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static void usage(const char *prog)
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{
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const char *str =
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" Usage: %s [OPTIONS]\n"
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" Options:\n"
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" -r, --rxdrop Discard all incoming packets (default)\n"
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" -t, --txonly Only send packets\n"
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" -l, --l2fwd MAC swap L2 forwarding\n"
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" -i, --interface=n Run on interface n\n"
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" -q, --queue=n Use queue n (default 0)\n"
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" -p, --poll Use poll syscall\n"
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" -S, --xdp-skb=n Use XDP skb-mod\n"
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" -N, --xdp-native=n Enforce XDP native mode\n"
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" -n, --interval=n Specify statistics update interval (default 1 sec).\n"
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" -z, --zero-copy Force zero-copy mode.\n"
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" -c, --copy Force copy mode.\n"
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" -m, --no-need-wakeup Turn off use of driver need wakeup flag.\n"
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" -f, --frame-size=n Set the frame size (must be a power of two in aligned mode, default is %d).\n"
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" -u, --unaligned Enable unaligned chunk placement\n"
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" -M, --shared-umem Enable XDP_SHARED_UMEM\n"
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" -F, --force Force loading the XDP prog\n"
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"\n";
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fprintf(stderr, str, prog, XSK_UMEM__DEFAULT_FRAME_SIZE);
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exit(EXIT_FAILURE);
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}
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static void parse_command_line(int argc, char **argv)
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{
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int option_index, c;
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opterr = 0;
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for (;;) {
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c = getopt_long(argc, argv, "Frtli:q:psSNn:czf:muM",
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long_options, &option_index);
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if (c == -1)
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break;
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switch (c) {
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case 'r':
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opt_bench = BENCH_RXDROP;
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break;
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case 't':
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opt_bench = BENCH_TXONLY;
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break;
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case 'l':
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opt_bench = BENCH_L2FWD;
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break;
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case 'i':
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opt_if = optarg;
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break;
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case 'q':
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opt_queue = atoi(optarg);
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break;
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case 'p':
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opt_poll = 1;
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break;
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case 'S':
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opt_xdp_flags |= XDP_FLAGS_SKB_MODE;
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opt_xdp_bind_flags |= XDP_COPY;
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break;
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case 'N':
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opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
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break;
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case 'n':
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opt_interval = atoi(optarg);
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break;
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case 'z':
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opt_xdp_bind_flags |= XDP_ZEROCOPY;
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break;
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case 'c':
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opt_xdp_bind_flags |= XDP_COPY;
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break;
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case 'u':
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opt_umem_flags |= XDP_UMEM_UNALIGNED_CHUNK_FLAG;
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opt_unaligned_chunks = 1;
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opt_mmap_flags = MAP_HUGETLB;
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break;
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case 'F':
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opt_xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
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break;
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case 'f':
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opt_xsk_frame_size = atoi(optarg);
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break;
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case 'm':
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opt_need_wakeup = false;
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opt_xdp_bind_flags &= ~XDP_USE_NEED_WAKEUP;
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break;
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case 'M':
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opt_num_xsks = MAX_SOCKS;
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break;
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default:
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usage(basename(argv[0]));
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}
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}
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opt_ifindex = if_nametoindex(opt_if);
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if (!opt_ifindex) {
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fprintf(stderr, "ERROR: interface \"%s\" does not exist\n",
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opt_if);
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usage(basename(argv[0]));
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}
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if ((opt_xsk_frame_size & (opt_xsk_frame_size - 1)) &&
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!opt_unaligned_chunks) {
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fprintf(stderr, "--frame-size=%d is not a power of two\n",
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opt_xsk_frame_size);
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usage(basename(argv[0]));
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}
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}
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static void kick_tx(struct xsk_socket_info *xsk)
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{
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int ret;
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ret = sendto(xsk_socket__fd(xsk->xsk), NULL, 0, MSG_DONTWAIT, NULL, 0);
|
|
if (ret >= 0 || errno == ENOBUFS || errno == EAGAIN || errno == EBUSY)
|
|
return;
|
|
exit_with_error(errno);
|
|
}
|
|
|
|
static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk,
|
|
struct pollfd *fds)
|
|
{
|
|
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;
|
|
|
|
if (!opt_need_wakeup || xsk_ring_prod__needs_wakeup(&xsk->tx))
|
|
kick_tx(xsk);
|
|
|
|
ndescs = (xsk->outstanding_tx > BATCH_SIZE) ? 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 (xsk_ring_prod__needs_wakeup(&umem->fq))
|
|
ret = poll(fds, num_socks, opt_timeout);
|
|
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;
|
|
xsk->tx_npkts += rcvd;
|
|
}
|
|
}
|
|
|
|
static inline void complete_tx_only(struct xsk_socket_info *xsk)
|
|
{
|
|
unsigned int rcvd;
|
|
u32 idx;
|
|
|
|
if (!xsk->outstanding_tx)
|
|
return;
|
|
|
|
if (!opt_need_wakeup || xsk_ring_prod__needs_wakeup(&xsk->tx))
|
|
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;
|
|
xsk->tx_npkts += rcvd;
|
|
}
|
|
}
|
|
|
|
static void rx_drop(struct xsk_socket_info *xsk, struct pollfd *fds)
|
|
{
|
|
unsigned int rcvd, i;
|
|
u32 idx_rx = 0, idx_fq = 0;
|
|
int ret;
|
|
|
|
rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx);
|
|
if (!rcvd) {
|
|
if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq))
|
|
ret = poll(fds, num_socks, opt_timeout);
|
|
return;
|
|
}
|
|
|
|
ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
|
|
while (ret != rcvd) {
|
|
if (ret < 0)
|
|
exit_with_error(-ret);
|
|
if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq))
|
|
ret = poll(fds, num_socks, opt_timeout);
|
|
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->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) {
|
|
ret = poll(fds, num_socks, opt_timeout);
|
|
if (ret <= 0)
|
|
continue;
|
|
}
|
|
|
|
for (i = 0; i < num_socks; i++)
|
|
rx_drop(xsks[i], fds);
|
|
}
|
|
}
|
|
|
|
static void tx_only(struct xsk_socket_info *xsk, u32 frame_nb)
|
|
{
|
|
u32 idx;
|
|
|
|
if (xsk_ring_prod__reserve(&xsk->tx, BATCH_SIZE, &idx) == BATCH_SIZE) {
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < BATCH_SIZE; i++) {
|
|
xsk_ring_prod__tx_desc(&xsk->tx, idx + i)->addr =
|
|
(frame_nb + i) << XSK_UMEM__DEFAULT_FRAME_SHIFT;
|
|
xsk_ring_prod__tx_desc(&xsk->tx, idx + i)->len =
|
|
sizeof(pkt_data) - 1;
|
|
}
|
|
|
|
xsk_ring_prod__submit(&xsk->tx, BATCH_SIZE);
|
|
xsk->outstanding_tx += BATCH_SIZE;
|
|
frame_nb += BATCH_SIZE;
|
|
frame_nb %= NUM_FRAMES;
|
|
}
|
|
|
|
complete_tx_only(xsk);
|
|
}
|
|
|
|
static void tx_only_all(void)
|
|
{
|
|
struct pollfd fds[MAX_SOCKS] = {};
|
|
u32 frame_nb[MAX_SOCKS] = {};
|
|
int i, ret;
|
|
|
|
for (i = 0; i < num_socks; i++) {
|
|
fds[0].fd = xsk_socket__fd(xsks[i]->xsk);
|
|
fds[0].events = POLLOUT;
|
|
}
|
|
|
|
for (;;) {
|
|
if (opt_poll) {
|
|
ret = poll(fds, num_socks, opt_timeout);
|
|
if (ret <= 0)
|
|
continue;
|
|
|
|
if (!(fds[0].revents & POLLOUT))
|
|
continue;
|
|
}
|
|
|
|
for (i = 0; i < num_socks; i++)
|
|
tx_only(xsks[i], frame_nb[i]);
|
|
}
|
|
}
|
|
|
|
static void l2fwd(struct xsk_socket_info *xsk, struct pollfd *fds)
|
|
{
|
|
unsigned int rcvd, i;
|
|
u32 idx_rx = 0, idx_tx = 0;
|
|
int ret;
|
|
|
|
complete_tx_l2fwd(xsk, fds);
|
|
|
|
rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE, &idx_rx);
|
|
if (!rcvd) {
|
|
if (xsk_ring_prod__needs_wakeup(&xsk->umem->fq))
|
|
ret = poll(fds, num_socks, opt_timeout);
|
|
return;
|
|
}
|
|
|
|
ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
|
|
while (ret != rcvd) {
|
|
if (ret < 0)
|
|
exit_with_error(-ret);
|
|
if (xsk_ring_prod__needs_wakeup(&xsk->tx))
|
|
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->rx_npkts += rcvd;
|
|
xsk->outstanding_tx += rcvd;
|
|
}
|
|
|
|
static void l2fwd_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 = POLLOUT | POLLIN;
|
|
}
|
|
|
|
for (;;) {
|
|
if (opt_poll) {
|
|
ret = poll(fds, num_socks, opt_timeout);
|
|
if (ret <= 0)
|
|
continue;
|
|
}
|
|
|
|
for (i = 0; i < num_socks; i++)
|
|
l2fwd(xsks[i], fds);
|
|
}
|
|
}
|
|
|
|
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_set_link_xdp_fd(opt_ifindex, prog_fd, opt_xdp_flags) < 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);
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
|
|
bool rx = false, tx = false;
|
|
struct xsk_umem_info *umem;
|
|
struct bpf_object *obj;
|
|
pthread_t pt;
|
|
int i, ret;
|
|
void *bufs;
|
|
|
|
parse_command_line(argc, argv);
|
|
|
|
if (setrlimit(RLIMIT_MEMLOCK, &r)) {
|
|
fprintf(stderr, "ERROR: setrlimit(RLIMIT_MEMLOCK) \"%s\"\n",
|
|
strerror(errno));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
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);
|
|
|
|
if (opt_bench == BENCH_TXONLY)
|
|
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);
|
|
|
|
signal(SIGINT, int_exit);
|
|
signal(SIGTERM, int_exit);
|
|
signal(SIGABRT, int_exit);
|
|
|
|
setlocale(LC_ALL, "");
|
|
|
|
ret = pthread_create(&pt, NULL, poller, NULL);
|
|
if (ret)
|
|
exit_with_error(ret);
|
|
|
|
prev_time = get_nsecs();
|
|
|
|
if (opt_bench == BENCH_RXDROP)
|
|
rx_drop_all();
|
|
else if (opt_bench == BENCH_TXONLY)
|
|
tx_only_all();
|
|
else
|
|
l2fwd_all();
|
|
|
|
return 0;
|
|
}
|