tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 2017 Jesper Dangaard Brouer, Red Hat, Inc. */
3static const char *__doc__=
4"XDP monitor tool, based on tracepoints\n";
5
6static 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 <sys/resource.h>
21#include <getopt.h>
22#include <net/if.h>
23#include <time.h>
24#include <signal.h>
25#include <bpf/bpf.h>
26#include <bpf/libbpf.h>
27#include "bpf_util.h"
28#include "xdp_sample_user.h"
29#include "xdp_monitor.skel.h"
30
31static int mask = SAMPLE_REDIRECT_ERR_CNT | SAMPLE_CPUMAP_ENQUEUE_CNT |
32 SAMPLE_CPUMAP_KTHREAD_CNT | SAMPLE_EXCEPTION_CNT |
33 SAMPLE_DEVMAP_XMIT_CNT | SAMPLE_DEVMAP_XMIT_CNT_MULTI;
34
35DEFINE_SAMPLE_INIT(xdp_monitor);
36
37static const struct option long_options[] = {
38 { "help", no_argument, NULL, 'h' },
39 { "stats", no_argument, NULL, 's' },
40 { "interval", required_argument, NULL, 'i' },
41 { "verbose", no_argument, NULL, 'v' },
42 {}
43};
44
45int main(int argc, char **argv)
46{
47 unsigned long interval = 2;
48 int ret = EXIT_FAIL_OPTION;
49 struct xdp_monitor *skel;
50 bool errors_only = true;
51 int longindex = 0, opt;
52 bool error = true;
53
54 /* Parse commands line args */
55 while ((opt = getopt_long(argc, argv, "si:vh",
56 long_options, &longindex)) != -1) {
57 switch (opt) {
58 case 's':
59 errors_only = false;
60 mask |= SAMPLE_REDIRECT_CNT;
61 break;
62 case 'i':
63 interval = strtoul(optarg, NULL, 0);
64 break;
65 case 'v':
66 sample_switch_mode();
67 break;
68 case 'h':
69 error = false;
70 default:
71 sample_usage(argv, long_options, __doc__, mask, error);
72 return ret;
73 }
74 }
75
76 skel = xdp_monitor__open();
77 if (!skel) {
78 fprintf(stderr, "Failed to xdp_monitor__open: %s\n",
79 strerror(errno));
80 ret = EXIT_FAIL_BPF;
81 goto end;
82 }
83
84 ret = sample_init_pre_load(skel);
85 if (ret < 0) {
86 fprintf(stderr, "Failed to sample_init_pre_load: %s\n", strerror(-ret));
87 ret = EXIT_FAIL_BPF;
88 goto end_destroy;
89 }
90
91 ret = xdp_monitor__load(skel);
92 if (ret < 0) {
93 fprintf(stderr, "Failed to xdp_monitor__load: %s\n", strerror(errno));
94 ret = EXIT_FAIL_BPF;
95 goto end_destroy;
96 }
97
98 ret = sample_init(skel, mask);
99 if (ret < 0) {
100 fprintf(stderr, "Failed to initialize sample: %s\n", strerror(-ret));
101 ret = EXIT_FAIL_BPF;
102 goto end_destroy;
103 }
104
105 if (errors_only)
106 printf("%s", __doc_err_only__);
107
108 ret = sample_run(interval, NULL, NULL);
109 if (ret < 0) {
110 fprintf(stderr, "Failed during sample run: %s\n", strerror(-ret));
111 ret = EXIT_FAIL;
112 goto end_destroy;
113 }
114 ret = EXIT_OK;
115end_destroy:
116 xdp_monitor__destroy(skel);
117end:
118 sample_exit(ret);
119}