samples/bpf/xdp_monitor_user.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2017 Jesper Dangaard Brouer, Red Hat, Inc. */
   3 static const char *__doc__=
   4 "XDP monitor tool, based on tracepoints\n";
   5
   6 static const char *__doc_err_only__=
   7 " NOTICE: Only tracking XDP redirect errors\n"
   8 "         Enable redirect success stats via '-s/--stats'\n"
   9 "         (which comes with a per packet processing overhead)\n";
  10
  11 #include <errno.h>
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <stdbool.h>
  15 #include <stdint.h>
  16 #include <string.h>
  17 #include <ctype.h>
  18 #include <unistd.h>
  19 #include <locale.h>
  20 #include <getopt.h>
  21 #include <net/if.h>
  22 #include <time.h>
  23 #include <signal.h>
  24 #include <bpf/bpf.h>
  25 #include <bpf/libbpf.h>
  26 #include "bpf_util.h"
  27 #include "xdp_sample_user.h"
  28 #include "xdp_monitor.skel.h"
  29
  30 static int mask = SAMPLE_REDIRECT_ERR_CNT | SAMPLE_CPUMAP_ENQUEUE_CNT |
  31                   SAMPLE_CPUMAP_KTHREAD_CNT | SAMPLE_EXCEPTION_CNT |
  32                   SAMPLE_DEVMAP_XMIT_CNT | SAMPLE_DEVMAP_XMIT_CNT_MULTI;
  33
  34 DEFINE_SAMPLE_INIT(xdp_monitor);
  35
  36 static const struct option long_options[] = {
  37         { "help", no_argument, NULL, 'h' },
  38         { "stats", no_argument, NULL, 's' },
  39         { "interval", required_argument, NULL, 'i' },
  40         { "verbose", no_argument, NULL, 'v' },
  41         {}
  42 };
  43
  44 int main(int argc, char **argv)
  45 {
  46         unsigned long interval = 2;
  47         int ret = EXIT_FAIL_OPTION;
  48         struct xdp_monitor *skel;
  49         bool errors_only = true;
  50         int longindex = 0, opt;
  51         bool error = true;
  52
  53         /* Parse commands line args */
  54         while ((opt = getopt_long(argc, argv, "si:vh",
  55                                   long_options, &longindex)) != -1) {
  56                 switch (opt) {
  57                 case 's':
  58                         errors_only = false;
  59                         mask |= SAMPLE_REDIRECT_CNT;
  60                         break;
  61                 case 'i':
  62                         interval = strtoul(optarg, NULL, 0);
  63                         break;
  64                 case 'v':
  65                         sample_switch_mode();
  66                         break;
  67                 case 'h':
  68                         error = false;
  69                 default:
  70                         sample_usage(argv, long_options, __doc__, mask, error);
  71                         return ret;
  72                 }
  73         }
  74
  75         skel = xdp_monitor__open();
  76         if (!skel) {
  77                 fprintf(stderr, "Failed to xdp_monitor__open: %s\n",
  78                         strerror(errno));
  79                 ret = EXIT_FAIL_BPF;
  80                 goto end;
  81         }
  82
  83         ret = sample_init_pre_load(skel);
  84         if (ret < 0) {
  85                 fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret));
  86                 ret = EXIT_FAIL_BPF;
  87                 goto end_destroy;
  88         }
  89
  90         ret = xdp_monitor__load(skel);
  91         if (ret < 0) {
  92                 fprintf(stderr, "Failed to xdp_monitor__load: %s\n", strerror(errno));
  93                 ret = EXIT_FAIL_BPF;
  94                 goto end_destroy;
  95         }
  96
  97         ret = sample_init(skel, mask);
  98         if (ret < 0) {
  99                 fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret));
 100                 ret = EXIT_FAIL_BPF;
 101                 goto end_destroy;
 102         }
 103
 104         if (errors_only)
 105                 printf("%s", __doc_err_only__);
 106
 107         ret = sample_run(interval, NULL, NULL);
 108         if (ret < 0) {
 109                 fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret));
 110                 ret = EXIT_FAIL;
 111                 goto end_destroy;
 112         }
 113         ret = EXIT_OK;
 114 end_destroy:
 115         xdp_monitor__destroy(skel);
 116 end:
 117         sample_exit(ret);
 118 }