mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 19:00:25 +00:00
![Maciej Fijalkowski](/assets/img/avatar_default.png)
ndo_xsk_wakeup() can return -ENETDOWN and there's no particular reason
to bail the whole application out on that case. Let's check in kick_tx()
whether errno was set to mentioned value and basically allow application
to further process frames.
Fixes: 248c7f9c0e
("samples/bpf: convert xdpsock to use libbpf for AF_XDP access")
Reported-by: Cameron Elliott <cameron@cameronelliott.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/20200205045834.56795-4-maciej.fijalkowski@intel.com
1212 lines
28 KiB
C
1212 lines
28 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 <linux/ip.h>
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#include <linux/udp.h>
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#include <arpa/inet.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 <bpf/libbpf.h>
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#include <bpf/xsk.h>
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#include <bpf/bpf.h>
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#include "xdpsock.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 MIN_PKT_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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typedef __u16 u16;
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typedef __u8 u8;
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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 unsigned long opt_duration;
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static unsigned long start_time;
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static bool benchmark_done;
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static u32 opt_batch_size = 64;
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static int opt_pkt_count;
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static u16 opt_pkt_size = MIN_PKT_SIZE;
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static u32 opt_pkt_fill_pattern = 0x12345678;
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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 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 bool is_benchmark_done(void)
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{
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if (opt_duration > 0) {
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unsigned long dt = (get_nsecs() - start_time);
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if (dt >= opt_duration)
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benchmark_done = true;
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}
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return benchmark_done;
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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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while (!is_benchmark_done()) {
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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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benchmark_done = true;
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}
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static void xdpsock_cleanup(void)
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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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}
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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 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 void *memset32_htonl(void *dest, u32 val, u32 size)
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{
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u32 *ptr = (u32 *)dest;
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int i;
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val = htonl(val);
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for (i = 0; i < (size & (~0x3)); i += 4)
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ptr[i >> 2] = val;
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for (; i < size; i++)
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((char *)dest)[i] = ((char *)&val)[i & 3];
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return dest;
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}
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/*
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* This function code has been taken from
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* Linux kernel lib/checksum.c
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*/
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static inline unsigned short from32to16(unsigned int x)
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{
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/* add up 16-bit and 16-bit for 16+c bit */
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x = (x & 0xffff) + (x >> 16);
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/* add up carry.. */
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x = (x & 0xffff) + (x >> 16);
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return x;
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}
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/*
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* This function code has been taken from
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* Linux kernel lib/checksum.c
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*/
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static unsigned int do_csum(const unsigned char *buff, int len)
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{
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unsigned int result = 0;
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int odd;
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if (len <= 0)
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goto out;
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odd = 1 & (unsigned long)buff;
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if (odd) {
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#ifdef __LITTLE_ENDIAN
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result += (*buff << 8);
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#else
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result = *buff;
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#endif
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len--;
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buff++;
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}
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if (len >= 2) {
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if (2 & (unsigned long)buff) {
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result += *(unsigned short *)buff;
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len -= 2;
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buff += 2;
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}
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if (len >= 4) {
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const unsigned char *end = buff +
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((unsigned int)len & ~3);
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unsigned int carry = 0;
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do {
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unsigned int w = *(unsigned int *)buff;
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buff += 4;
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result += carry;
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result += w;
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carry = (w > result);
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} while (buff < end);
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result += carry;
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result = (result & 0xffff) + (result >> 16);
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}
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if (len & 2) {
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result += *(unsigned short *)buff;
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buff += 2;
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}
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}
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if (len & 1)
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#ifdef __LITTLE_ENDIAN
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result += *buff;
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#else
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result += (*buff << 8);
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#endif
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result = from32to16(result);
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if (odd)
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result = ((result >> 8) & 0xff) | ((result & 0xff) << 8);
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out:
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return result;
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}
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__sum16 ip_fast_csum(const void *iph, unsigned int ihl);
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/*
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* This is a version of ip_compute_csum() optimized for IP headers,
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* which always checksum on 4 octet boundaries.
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* This function code has been taken from
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* Linux kernel lib/checksum.c
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*/
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__sum16 ip_fast_csum(const void *iph, unsigned int ihl)
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{
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return (__force __sum16)~do_csum(iph, ihl * 4);
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}
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/*
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* Fold a partial checksum
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* This function code has been taken from
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* Linux kernel include/asm-generic/checksum.h
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*/
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static inline __sum16 csum_fold(__wsum csum)
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{
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u32 sum = (__force u32)csum;
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sum = (sum & 0xffff) + (sum >> 16);
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sum = (sum & 0xffff) + (sum >> 16);
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return (__force __sum16)~sum;
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}
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/*
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* This function code has been taken from
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* Linux kernel lib/checksum.c
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*/
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static inline u32 from64to32(u64 x)
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{
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/* add up 32-bit and 32-bit for 32+c bit */
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x = (x & 0xffffffff) + (x >> 32);
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/* add up carry.. */
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x = (x & 0xffffffff) + (x >> 32);
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return (u32)x;
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}
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__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
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__u32 len, __u8 proto, __wsum sum);
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/*
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* This function code has been taken from
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* Linux kernel lib/checksum.c
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*/
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__wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
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__u32 len, __u8 proto, __wsum sum)
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{
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unsigned long long s = (__force u32)sum;
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s += (__force u32)saddr;
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s += (__force u32)daddr;
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#ifdef __BIG_ENDIAN__
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s += proto + len;
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#else
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s += (proto + len) << 8;
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#endif
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return (__force __wsum)from64to32(s);
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}
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|
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/*
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* This function has been taken from
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* Linux kernel include/asm-generic/checksum.h
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*/
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static inline __sum16
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csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len,
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__u8 proto, __wsum sum)
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{
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return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
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}
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static inline u16 udp_csum(u32 saddr, u32 daddr, u32 len,
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u8 proto, u16 *udp_pkt)
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{
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u32 csum = 0;
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u32 cnt = 0;
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/* udp hdr and data */
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for (; cnt < len; cnt += 2)
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csum += udp_pkt[cnt >> 1];
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return csum_tcpudp_magic(saddr, daddr, len, proto, csum);
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}
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|
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#define ETH_FCS_SIZE 4
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#define PKT_HDR_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) + \
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sizeof(struct udphdr))
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#define PKT_SIZE (opt_pkt_size - ETH_FCS_SIZE)
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#define IP_PKT_SIZE (PKT_SIZE - sizeof(struct ethhdr))
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#define UDP_PKT_SIZE (IP_PKT_SIZE - sizeof(struct iphdr))
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#define UDP_PKT_DATA_SIZE (UDP_PKT_SIZE - sizeof(struct udphdr))
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|
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static u8 pkt_data[XSK_UMEM__DEFAULT_FRAME_SIZE];
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|
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static void gen_eth_hdr_data(void)
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{
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struct udphdr *udp_hdr = (struct udphdr *)(pkt_data +
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sizeof(struct ethhdr) +
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sizeof(struct iphdr));
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struct iphdr *ip_hdr = (struct iphdr *)(pkt_data +
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sizeof(struct ethhdr));
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struct ethhdr *eth_hdr = (struct ethhdr *)pkt_data;
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/* ethernet header */
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memcpy(eth_hdr->h_dest, "\x3c\xfd\xfe\x9e\x7f\x71", ETH_ALEN);
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memcpy(eth_hdr->h_source, "\xec\xb1\xd7\x98\x3a\xc0", ETH_ALEN);
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eth_hdr->h_proto = htons(ETH_P_IP);
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/* IP header */
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ip_hdr->version = IPVERSION;
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ip_hdr->ihl = 0x5; /* 20 byte header */
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ip_hdr->tos = 0x0;
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ip_hdr->tot_len = htons(IP_PKT_SIZE);
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ip_hdr->id = 0;
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ip_hdr->frag_off = 0;
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ip_hdr->ttl = IPDEFTTL;
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ip_hdr->protocol = IPPROTO_UDP;
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ip_hdr->saddr = htonl(0x0a0a0a10);
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ip_hdr->daddr = htonl(0x0a0a0a20);
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/* 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);
|
|
|
|
/* 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 = {
|
|
.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
|
|
.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, &idx);
|
|
if (ret != XSK_RING_PROD__DEFAULT_NUM_DESCS)
|
|
exit_with_error(-ret);
|
|
for (i = 0; i < XSK_RING_PROD__DEFAULT_NUM_DESCS; 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);
|
|
}
|
|
|
|
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)
|
|
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_get_link_xdp_id(opt_ifindex, &prog_id, opt_xdp_flags);
|
|
if (ret)
|
|
exit_with_error(-ret);
|
|
|
|
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'},
|
|
{"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'},
|
|
{"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'},
|
|
{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"
|
|
" -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\n"
|
|
" -F, --force Force loading the XDP prog\n"
|
|
" -d, --duration=n Duration in secs to run command.\n"
|
|
" Default: forever.\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"
|
|
"\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);
|
|
|
|
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:czf:muMd:b:C:s:P:",
|
|
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 '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;
|
|
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]));
|
|
}
|
|
}
|
|
|
|
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 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 > 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 (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,
|
|
int batch_size)
|
|
{
|
|
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, opt_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);
|
|
|
|
if (benchmark_done)
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void tx_only(struct xsk_socket_info *xsk, u32 frame_nb, int batch_size)
|
|
{
|
|
u32 idx;
|
|
unsigned int i;
|
|
|
|
while (xsk_ring_prod__reserve(&xsk->tx, batch_size, &idx) <
|
|
batch_size) {
|
|
complete_tx_only(xsk, batch_size);
|
|
}
|
|
|
|
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) << XSK_UMEM__DEFAULT_FRAME_SHIFT;
|
|
tx_desc->len = PKT_SIZE;
|
|
}
|
|
|
|
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, 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;
|
|
}
|
|
}
|
|
} while (pending);
|
|
}
|
|
|
|
static void tx_only_all(void)
|
|
{
|
|
struct pollfd fds[MAX_SOCKS] = {};
|
|
u32 frame_nb[MAX_SOCKS] = {};
|
|
int pkt_cnt = 0;
|
|
int i, ret;
|
|
|
|
for (i = 0; i < num_socks; i++) {
|
|
fds[0].fd = xsk_socket__fd(xsks[i]->xsk);
|
|
fds[0].events = POLLOUT;
|
|
}
|
|
|
|
while ((opt_pkt_count && pkt_cnt < opt_pkt_count) || !opt_pkt_count) {
|
|
int batch_size = get_batch_size(pkt_cnt);
|
|
|
|
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], batch_size);
|
|
|
|
pkt_cnt += batch_size;
|
|
|
|
if (benchmark_done)
|
|
break;
|
|
}
|
|
|
|
if (opt_pkt_count)
|
|
complete_tx_only_all();
|
|
}
|
|
|
|
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, opt_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);
|
|
|
|
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_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) {
|
|
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);
|
|
|
|
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();
|
|
start_time = prev_time;
|
|
|
|
if (opt_bench == BENCH_RXDROP)
|
|
rx_drop_all();
|
|
else if (opt_bench == BENCH_TXONLY)
|
|
tx_only_all();
|
|
else
|
|
l2fwd_all();
|
|
|
|
benchmark_done = true;
|
|
|
|
pthread_join(pt, NULL);
|
|
|
|
xdpsock_cleanup();
|
|
|
|
return 0;
|
|
}
|