linux-imx

/* SPDX-License-Identifier: GPL-2.0

 * Copyright(c) 2017 Jesper Dangaard Brouer, Red Hat, Inc.

 */

static const char *__doc__=

 "XDP monitor tool, based on tracepoints\n"

;

​

static const char *__doc_err_only__=

 " NOTICE: Only tracking XDP redirect errors\n"

 "         Enable TX success stats via '--stats'\n"

 "         (which comes with a per packet processing overhead)\n"

;

​

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <stdbool.h>

#include <stdint.h>

#include <string.h>

#include <ctype.h>

#include <unistd.h>

#include <locale.h>

​

#include <sys/resource.h>

#include <getopt.h>

#include <net/if.h>

#include <time.h>

​

#include <bpf/bpf.h>

#include "bpf_load.h"

#include "bpf_util.h"

​

static int verbose = 1;

static bool debug = false;

​

static const struct option long_options[] = {

    {"help",    no_argument,        NULL, 'h' },

    {"debug",   no_argument,        NULL, 'D' },

    {"stats",   no_argument,        NULL, 'S' },

    {"sec",     required_argument,  NULL, 's' },

    {0, 0, NULL,  0 }

};

​

/* C standard specifies two constants, EXIT_SUCCESS(0) and EXIT_FAILURE(1) */

#define EXIT_FAIL_MEM   5

​

static void usage(char *argv[])

{

    int i;

    printf("\nDOCUMENTATION:\n%s\n", __doc__);

    printf("\n");

    printf(" Usage: %s (options-see-below)\n",

           argv[0]);

    printf(" Listing options:\n");

    for (i = 0; long_options[i].name != 0; i++) {

        printf(" --%-15s", long_options[i].name);

        if (long_options[i].flag != NULL)

            printf(" flag (internal value:%d)",

                   *long_options[i].flag);

        else

            printf("short-option: -%c",

                   long_options[i].val);

        printf("\n");