![Yonghong Song](/assets/img/avatar_default.png)
Compiling xdpsock_user.c with 4.8.5, I hit the following
compilation warning:
HOSTCC samples/bpf/xdpsock_user.o
/data/users/yhs/work/net-next/samples/bpf/xdpsock_user.c: In function ‘main’:
/data/users/yhs/work/net-next/samples/bpf/xdpsock_user.c:449:6: warning: ‘idx_cq’ may be used unini
tialized in this function [-Wmaybe-uninitialized]
u32 idx_cq, idx_fq;
^
/data/users/yhs/work/net-next/samples/bpf/xdpsock_user.c:606:7: warning: ‘idx_rx’ may be used unini
tialized in this function [-Wmaybe-uninitialized]
u32 idx_rx, idx_tx = 0;
^
/data/users/yhs/work/net-next/samples/bpf/xdpsock_user.c:506:6: warning: ‘idx_rx’ may be used unini
tialized in this function [-Wmaybe-uninitialized]
u32 idx_rx, idx_fq = 0;
As an example, the code pattern looks like:
u32 idx_cq;
...
ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
if (ret) {
...
}
... idx_fq ...
The compiler warns since it does not know whether &idx_fq is assigned
or not inside the library function xsk_ring_prod__reserve().
Let us assign an initial value 0 to such auto variables to silence
compiler warning.
Fixes: 248c7f9c0e
("samples/bpf: convert xdpsock to use libbpf for AF_XDP access")
Signed-off-by: Yonghong Song <yhs@fb.com>
Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
702 lines
15 KiB
C
702 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright(c) 2017 - 2018 Intel Corporation. */
|
|
|
|
#include <asm/barrier.h>
|
|
#include <errno.h>
|
|
#include <getopt.h>
|
|
#include <libgen.h>
|
|
#include <linux/bpf.h>
|
|
#include <linux/compiler.h>
|
|
#include <linux/if_link.h>
|
|
#include <linux/if_xdp.h>
|
|
#include <linux/if_ether.h>
|
|
#include <locale.h>
|
|
#include <net/ethernet.h>
|
|
#include <net/if.h>
|
|
#include <poll.h>
|
|
#include <pthread.h>
|
|
#include <signal.h>
|
|
#include <stdbool.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/mman.h>
|
|
#include <sys/resource.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/types.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
#include "bpf/libbpf.h"
|
|
#include "bpf/xsk.h"
|
|
#include <bpf/bpf.h>
|
|
|
|
#ifndef SOL_XDP
|
|
#define SOL_XDP 283
|
|
#endif
|
|
|
|
#ifndef AF_XDP
|
|
#define AF_XDP 44
|
|
#endif
|
|
|
|
#ifndef PF_XDP
|
|
#define PF_XDP AF_XDP
|
|
#endif
|
|
|
|
#define NUM_FRAMES (4 * 1024)
|
|
#define BATCH_SIZE 64
|
|
|
|
#define DEBUG_HEXDUMP 0
|
|
#define MAX_SOCKS 8
|
|
|
|
typedef __u64 u64;
|
|
typedef __u32 u32;
|
|
|
|
static unsigned long prev_time;
|
|
|
|
enum benchmark_type {
|
|
BENCH_RXDROP = 0,
|
|
BENCH_TXONLY = 1,
|
|
BENCH_L2FWD = 2,
|
|
};
|
|
|
|
static enum benchmark_type opt_bench = BENCH_RXDROP;
|
|
static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
|
|
static const char *opt_if = "";
|
|
static int opt_ifindex;
|
|
static int opt_queue;
|
|
static int opt_poll;
|
|
static int opt_interval = 1;
|
|
static u32 opt_xdp_bind_flags;
|
|
static __u32 prog_id;
|
|
|
|
struct xsk_umem_info {
|
|
struct xsk_ring_prod fq;
|
|
struct xsk_ring_cons cq;
|
|
struct xsk_umem *umem;
|
|
void *buffer;
|
|
};
|
|
|
|
struct xsk_socket_info {
|
|
struct xsk_ring_cons rx;
|
|
struct xsk_ring_prod tx;
|
|
struct xsk_umem_info *umem;
|
|
struct xsk_socket *xsk;
|
|
unsigned long rx_npkts;
|
|
unsigned long tx_npkts;
|
|
unsigned long prev_rx_npkts;
|
|
unsigned long prev_tx_npkts;
|
|
u32 outstanding_tx;
|
|
};
|
|
|
|
static int num_socks;
|
|
struct xsk_socket_info *xsks[MAX_SOCKS];
|
|
|
|
static unsigned long get_nsecs(void)
|
|
{
|
|
struct timespec ts;
|
|
|
|
clock_gettime(CLOCK_MONOTONIC, &ts);
|
|
return ts.tv_sec * 1000000000UL + ts.tv_nsec;
|
|
}
|
|
|
|
static void print_benchmark(bool running)
|
|
{
|
|
const char *bench_str = "INVALID";
|
|
|
|
if (opt_bench == BENCH_RXDROP)
|
|
bench_str = "rxdrop";
|
|
else if (opt_bench == BENCH_TXONLY)
|
|
bench_str = "txonly";
|
|
else if (opt_bench == BENCH_L2FWD)
|
|
bench_str = "l2fwd";
|
|
|
|
printf("%s:%d %s ", opt_if, opt_queue, bench_str);
|
|
if (opt_xdp_flags & XDP_FLAGS_SKB_MODE)
|
|
printf("xdp-skb ");
|
|
else if (opt_xdp_flags & XDP_FLAGS_DRV_MODE)
|
|
printf("xdp-drv ");
|
|
else
|
|
printf(" ");
|
|
|
|
if (opt_poll)
|
|
printf("poll() ");
|
|
|
|
if (running) {
|
|
printf("running...");
|
|
fflush(stdout);
|
|
}
|
|
}
|
|
|
|
static void dump_stats(void)
|
|
{
|
|
unsigned long now = get_nsecs();
|
|
long dt = now - prev_time;
|
|
int i;
|
|
|
|
prev_time = now;
|
|
|
|
for (i = 0; i < num_socks && xsks[i]; i++) {
|
|
char *fmt = "%-15s %'-11.0f %'-11lu\n";
|
|
double rx_pps, tx_pps;
|
|
|
|
rx_pps = (xsks[i]->rx_npkts - xsks[i]->prev_rx_npkts) *
|
|
1000000000. / dt;
|
|
tx_pps = (xsks[i]->tx_npkts - xsks[i]->prev_tx_npkts) *
|
|
1000000000. / dt;
|
|
|
|
printf("\n sock%d@", i);
|
|
print_benchmark(false);
|
|
printf("\n");
|
|
|
|
printf("%-15s %-11s %-11s %-11.2f\n", "", "pps", "pkts",
|
|
dt / 1000000000.);
|
|
printf(fmt, "rx", rx_pps, xsks[i]->rx_npkts);
|
|
printf(fmt, "tx", tx_pps, xsks[i]->tx_npkts);
|
|
|
|
xsks[i]->prev_rx_npkts = xsks[i]->rx_npkts;
|
|
xsks[i]->prev_tx_npkts = xsks[i]->tx_npkts;
|
|
}
|
|
}
|
|
|
|
static void *poller(void *arg)
|
|
{
|
|
(void)arg;
|
|
for (;;) {
|
|
sleep(opt_interval);
|
|
dump_stats();
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void remove_xdp_program(void)
|
|
{
|
|
__u32 curr_prog_id = 0;
|
|
|
|
if (bpf_get_link_xdp_id(opt_ifindex, &curr_prog_id, opt_xdp_flags)) {
|
|
printf("bpf_get_link_xdp_id failed\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
if (prog_id == curr_prog_id)
|
|
bpf_set_link_xdp_fd(opt_ifindex, -1, opt_xdp_flags);
|
|
else if (!curr_prog_id)
|
|
printf("couldn't find a prog id on a given interface\n");
|
|
else
|
|
printf("program on interface changed, not removing\n");
|
|
}
|
|
|
|
static void int_exit(int sig)
|
|
{
|
|
struct xsk_umem *umem = xsks[0]->umem->umem;
|
|
|
|
(void)sig;
|
|
|
|
dump_stats();
|
|
xsk_socket__delete(xsks[0]->xsk);
|
|
(void)xsk_umem__delete(umem);
|
|
remove_xdp_program();
|
|
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
static void __exit_with_error(int error, const char *file, const char *func,
|
|
int line)
|
|
{
|
|
fprintf(stderr, "%s:%s:%i: errno: %d/\"%s\"\n", file, func,
|
|
line, error, strerror(error));
|
|
dump_stats();
|
|
remove_xdp_program();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
#define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, \
|
|
__LINE__)
|
|
|
|
static const char pkt_data[] =
|
|
"\x3c\xfd\xfe\x9e\x7f\x71\xec\xb1\xd7\x98\x3a\xc0\x08\x00\x45\x00"
|
|
"\x00\x2e\x00\x00\x00\x00\x40\x11\x88\x97\x05\x08\x07\x08\xc8\x14"
|
|
"\x1e\x04\x10\x92\x10\x92\x00\x1a\x6d\xa3\x34\x33\x1f\x69\x40\x6b"
|
|
"\x54\x59\xb6\x14\x2d\x11\x44\xbf\xaf\xd9\xbe\xaa";
|
|
|
|
static void swap_mac_addresses(void *data)
|
|
{
|
|
struct ether_header *eth = (struct ether_header *)data;
|
|
struct ether_addr *src_addr = (struct ether_addr *)ð->ether_shost;
|
|
struct ether_addr *dst_addr = (struct ether_addr *)ð->ether_dhost;
|
|
struct ether_addr tmp;
|
|
|
|
tmp = *src_addr;
|
|
*src_addr = *dst_addr;
|
|
*dst_addr = tmp;
|
|
}
|
|
|
|
static void hex_dump(void *pkt, size_t length, u64 addr)
|
|
{
|
|
const unsigned char *address = (unsigned char *)pkt;
|
|
const unsigned char *line = address;
|
|
size_t line_size = 32;
|
|
unsigned char c;
|
|
char buf[32];
|
|
int i = 0;
|
|
|
|
if (!DEBUG_HEXDUMP)
|
|
return;
|
|
|
|
sprintf(buf, "addr=%llu", addr);
|
|
printf("length = %zu\n", length);
|
|
printf("%s | ", buf);
|
|
while (length-- > 0) {
|
|
printf("%02X ", *address++);
|
|
if (!(++i % line_size) || (length == 0 && i % line_size)) {
|
|
if (length == 0) {
|
|
while (i++ % line_size)
|
|
printf("__ ");
|
|
}
|
|
printf(" | "); /* right close */
|
|
while (line < address) {
|
|
c = *line++;
|
|
printf("%c", (c < 33 || c == 255) ? 0x2E : c);
|
|
}
|
|
printf("\n");
|
|
if (length > 0)
|
|
printf("%s | ", buf);
|
|
}
|
|
}
|
|
printf("\n");
|
|
}
|
|
|
|
static size_t gen_eth_frame(struct xsk_umem_info *umem, u64 addr)
|
|
{
|
|
memcpy(xsk_umem__get_data(umem->buffer, addr), pkt_data,
|
|
sizeof(pkt_data) - 1);
|
|
return sizeof(pkt_data) - 1;
|
|
}
|
|
|
|
static struct xsk_umem_info *xsk_configure_umem(void *buffer, u64 size)
|
|
{
|
|
struct xsk_umem_info *umem;
|
|
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,
|
|
NULL);
|
|
if (ret)
|
|
exit_with_error(-ret);
|
|
|
|
umem->buffer = buffer;
|
|
return umem;
|
|
}
|
|
|
|
static struct xsk_socket_info *xsk_configure_socket(struct xsk_umem_info *umem)
|
|
{
|
|
struct xsk_socket_config cfg;
|
|
struct xsk_socket_info *xsk;
|
|
int ret;
|
|
u32 idx;
|
|
int i;
|
|
|
|
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;
|
|
cfg.libbpf_flags = 0;
|
|
cfg.xdp_flags = opt_xdp_flags;
|
|
cfg.bind_flags = opt_xdp_bind_flags;
|
|
ret = xsk_socket__create(&xsk->xsk, opt_if, opt_queue, umem->umem,
|
|
&xsk->rx, &xsk->tx, &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);
|
|
|
|
ret = xsk_ring_prod__reserve(&xsk->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 *
|
|
XSK_UMEM__DEFAULT_FRAME_SIZE;
|
|
i += XSK_UMEM__DEFAULT_FRAME_SIZE)
|
|
*xsk_ring_prod__fill_addr(&xsk->umem->fq, idx++) = i;
|
|
xsk_ring_prod__submit(&xsk->umem->fq,
|
|
XSK_RING_PROD__DEFAULT_NUM_DESCS);
|
|
|
|
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'},
|
|
{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 Enfore 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"
|
|
"\n";
|
|
fprintf(stderr, str, prog);
|
|
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:psSNn:cz", 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':
|
|
opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
|
|
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 'F':
|
|
opt_xdp_flags &= ~XDP_FLAGS_UPDATE_IF_NOEXIST;
|
|
break;
|
|
default:
|
|
usage(basename(argv[0]));
|
|
}
|
|
}
|
|
|
|
opt_ifindex = if_nametoindex(opt_if);
|
|
if (!opt_ifindex) {
|
|
fprintf(stderr, "ERROR: interface \"%s\" does not exist\n",
|
|
opt_if);
|
|
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)
|
|
return;
|
|
exit_with_error(errno);
|
|
}
|
|
|
|
static inline void complete_tx_l2fwd(struct xsk_socket_info *xsk)
|
|
{
|
|
u32 idx_cq = 0, idx_fq = 0;
|
|
unsigned int rcvd;
|
|
size_t ndescs;
|
|
|
|
if (!xsk->outstanding_tx)
|
|
return;
|
|
|
|
kick_tx(xsk);
|
|
ndescs = (xsk->outstanding_tx > BATCH_SIZE) ? BATCH_SIZE :
|
|
xsk->outstanding_tx;
|
|
|
|
/* re-add completed Tx buffers */
|
|
rcvd = xsk_ring_cons__peek(&xsk->umem->cq, ndescs, &idx_cq);
|
|
if (rcvd > 0) {
|
|
unsigned int i;
|
|
int ret;
|
|
|
|
ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
|
|
while (ret != rcvd) {
|
|
if (ret < 0)
|
|
exit_with_error(-ret);
|
|
ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd,
|
|
&idx_fq);
|
|
}
|
|
for (i = 0; i < rcvd; i++)
|
|
*xsk_ring_prod__fill_addr(&xsk->umem->fq, idx_fq++) =
|
|
*xsk_ring_cons__comp_addr(&xsk->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;
|
|
|
|
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)
|
|
{
|
|
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)
|
|
return;
|
|
|
|
ret = xsk_ring_prod__reserve(&xsk->umem->fq, rcvd, &idx_fq);
|
|
while (ret != rcvd) {
|
|
if (ret < 0)
|
|
exit_with_error(-ret);
|
|
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;
|
|
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++) = addr;
|
|
}
|
|
|
|
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 + 1];
|
|
int i, ret, timeout, nfds = 1;
|
|
|
|
memset(fds, 0, sizeof(fds));
|
|
|
|
for (i = 0; i < num_socks; i++) {
|
|
fds[i].fd = xsk_socket__fd(xsks[i]->xsk);
|
|
fds[i].events = POLLIN;
|
|
timeout = 1000; /* 1sn */
|
|
}
|
|
|
|
for (;;) {
|
|
if (opt_poll) {
|
|
ret = poll(fds, nfds, timeout);
|
|
if (ret <= 0)
|
|
continue;
|
|
}
|
|
|
|
for (i = 0; i < num_socks; i++)
|
|
rx_drop(xsks[i]);
|
|
}
|
|
}
|
|
|
|
static void tx_only(struct xsk_socket_info *xsk)
|
|
{
|
|
int timeout, ret, nfds = 1;
|
|
struct pollfd fds[nfds + 1];
|
|
u32 idx, frame_nb = 0;
|
|
|
|
memset(fds, 0, sizeof(fds));
|
|
fds[0].fd = xsk_socket__fd(xsk->xsk);
|
|
fds[0].events = POLLOUT;
|
|
timeout = 1000; /* 1sn */
|
|
|
|
for (;;) {
|
|
if (opt_poll) {
|
|
ret = poll(fds, nfds, timeout);
|
|
if (ret <= 0)
|
|
continue;
|
|
|
|
if (!(fds[0].revents & POLLOUT))
|
|
continue;
|
|
}
|
|
|
|
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 l2fwd(struct xsk_socket_info *xsk)
|
|
{
|
|
for (;;) {
|
|
unsigned int rcvd, i;
|
|
u32 idx_rx = 0, idx_tx = 0;
|
|
int ret;
|
|
|
|
for (;;) {
|
|
complete_tx_l2fwd(xsk);
|
|
|
|
rcvd = xsk_ring_cons__peek(&xsk->rx, BATCH_SIZE,
|
|
&idx_rx);
|
|
if (rcvd > 0)
|
|
break;
|
|
}
|
|
|
|
ret = xsk_ring_prod__reserve(&xsk->tx, rcvd, &idx_tx);
|
|
while (ret != rcvd) {
|
|
if (ret < 0)
|
|
exit_with_error(-ret);
|
|
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;
|
|
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 = addr;
|
|
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;
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
|
|
struct xsk_umem_info *umem;
|
|
pthread_t pt;
|
|
void *bufs;
|
|
int ret;
|
|
|
|
parse_command_line(argc, argv);
|
|
|
|
if (setrlimit(RLIMIT_MEMLOCK, &r)) {
|
|
fprintf(stderr, "ERROR: setrlimit(RLIMIT_MEMLOCK) \"%s\"\n",
|
|
strerror(errno));
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
ret = posix_memalign(&bufs, getpagesize(), /* PAGE_SIZE aligned */
|
|
NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE);
|
|
if (ret)
|
|
exit_with_error(ret);
|
|
|
|
/* Create sockets... */
|
|
umem = xsk_configure_umem(bufs,
|
|
NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE);
|
|
xsks[num_socks++] = xsk_configure_socket(umem);
|
|
|
|
if (opt_bench == BENCH_TXONLY) {
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_FRAMES * XSK_UMEM__DEFAULT_FRAME_SIZE;
|
|
i += XSK_UMEM__DEFAULT_FRAME_SIZE)
|
|
(void)gen_eth_frame(umem, i);
|
|
}
|
|
|
|
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(xsks[0]);
|
|
else
|
|
l2fwd(xsks[0]);
|
|
|
|
return 0;
|
|
}
|