tools/testing/selftests/bpf/prog_tests/timer_mim.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2021 Facebook */
   3 #include <test_progs.h>
   4 #include "timer_mim.skel.h"
   5 #include "timer_mim_reject.skel.h"
   6
   7 static int timer_mim(struct timer_mim *timer_skel)
   8 {
   9         __u64 cnt1, cnt2;
  10         int err, prog_fd, key1 = 1;
  11         LIBBPF_OPTS(bpf_test_run_opts, topts);
  12
  13         err = timer_mim__attach(timer_skel);
  14         if (!ASSERT_OK(err, "timer_attach"))
  15                 return err;
  16
  17         prog_fd = bpf_program__fd(timer_skel->progs.test1);
  18         err = bpf_prog_test_run_opts(prog_fd, &topts);
  19         ASSERT_OK(err, "test_run");
  20         ASSERT_EQ(topts.retval, 0, "test_run");
  21         timer_mim__detach(timer_skel);
  22
  23         /* check that timer_cb[12] are incrementing 'cnt' */
  24         cnt1 = READ_ONCE(timer_skel->bss->cnt);
  25         for (int i = 0; i < 100; i++) {
  26                 cnt2 = READ_ONCE(timer_skel->bss->cnt);
  27                 if (cnt2 != cnt1)
  28                         break;
  29                 usleep(200); /* 100 times more than interval */
  30         }
  31         ASSERT_GT(cnt2, cnt1, "cnt");
  32
  33         ASSERT_EQ(timer_skel->bss->err, 0, "err");
  34         /* check that code paths completed */
  35         ASSERT_EQ(timer_skel->bss->ok, 1 | 2, "ok");
  36
  37         close(bpf_map__fd(timer_skel->maps.inner_htab));
  38         err = bpf_map__delete_elem(timer_skel->maps.outer_arr, &key1, sizeof(key1), 0);
  39         ASSERT_EQ(err, 0, "delete inner map");
  40
  41         /* check that timer_cb[12] are no longer running */
  42         cnt1 = READ_ONCE(timer_skel->bss->cnt);
  43         for (int i = 0; i < 100; i++) {
  44                 usleep(200); /* 100 times more than interval */
  45                 cnt2 = READ_ONCE(timer_skel->bss->cnt);
  46                 if (cnt2 == cnt1)
  47                         break;
  48         }
  49         ASSERT_EQ(cnt2, cnt1, "cnt");
  50
  51         return 0;
  52 }
  53
  54 void serial_test_timer_mim(void)
  55 {
  56         struct timer_mim_reject *timer_reject_skel = NULL;
  57         libbpf_print_fn_t old_print_fn = NULL;
  58         struct timer_mim *timer_skel = NULL;
  59         int err;
  60
  61         old_print_fn = libbpf_set_print(NULL);
  62         timer_reject_skel = timer_mim_reject__open_and_load();
  63         libbpf_set_print(old_print_fn);
  64         if (!ASSERT_ERR_PTR(timer_reject_skel, "timer_reject_skel_load"))
  65                 goto cleanup;
  66
  67         timer_skel = timer_mim__open_and_load();
  68         if (!ASSERT_OK_PTR(timer_skel, "timer_skel_load"))
  69                 goto cleanup;
  70
  71         err = timer_mim(timer_skel);
  72         ASSERT_OK(err, "timer_mim");
  73 cleanup:
  74         timer_mim__destroy(timer_skel);
  75         timer_mim_reject__destroy(timer_reject_skel);
  76 }