LXR linux/tools/testing/selftests/bpf/prog_tests/snprintf

   1// SPDX-License-Identifier: GPL-2.0
   2#include <test_progs.h>
   3#include <linux/btf.h>
   4#include "netif_receive_skb.skel.h"
   5
   6/* Demonstrate that bpf_snprintf_btf succeeds and that various data types
   7 * are formatted correctly.
   8 */
   9void test_snprintf_btf(void)
  10{
  11        struct netif_receive_skb *skel;
  12        struct netif_receive_skb__bss *bss;
  13        int err, duration = 0;
  14
  15        skel = netif_receive_skb__open();
  16        if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
  17                return;
  18
  19        err = netif_receive_skb__load(skel);
  20        if (CHECK(err, "skel_load", "failed to load skeleton: %d\n", err))
  21                goto cleanup;
  22
  23        bss = skel->bss;
  24
  25        err = netif_receive_skb__attach(skel);
  26        if (CHECK(err, "skel_attach", "skeleton attach failed: %d\n", err))
  27                goto cleanup;
  28
  29        /* generate receive event */
  30        err = system("ping -c 1 127.0.0.1 > /dev/null");
  31        if (CHECK(err, "system", "ping failed: %d\n", err))
  32                goto cleanup;
  33
  34        if (bss->skip) {
  35                printf("%s:SKIP:no __builtin_btf_type_id\n", __func__);
  36                test__skip();
  37                goto cleanup;
  38        }
  39
  40        /*
  41         * Make sure netif_receive_skb program was triggered
  42         * and it set expected return values from bpf_trace_printk()s
  43         * and all tests ran.
  44         */
  45        if (!ASSERT_GT(bss->ret, 0, "bpf_snprintf_ret"))
  46                goto cleanup;
  47
  48        if (CHECK(bss->ran_subtests == 0, "check if subtests ran",
  49                  "no subtests ran, did BPF program run?"))
  50                goto cleanup;
  51
  52        if (CHECK(bss->num_subtests != bss->ran_subtests,
  53                  "check all subtests ran",
  54                  "only ran %d of %d tests\n", bss->num_subtests,
  55                  bss->ran_subtests))
  56                goto cleanup;
  57
  58cleanup:
  59        netif_receive_skb__destroy(skel);
  60}
  61