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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <test_progs.h>
   3 #include <network_helpers.h>
   4
   5 static void sigalrm_handler(int s) {}
   6 static struct sigaction sigalrm_action = {
   7         .sa_handler = sigalrm_handler,
   8 };
   9
  10 static void test_signal_pending_by_type(enum bpf_prog_type prog_type)
  11 {
  12         struct bpf_insn prog[4096];
  13         struct itimerval timeo = {
  14                 .it_value.tv_usec = 100000, /* 100ms */
  15         };
  16         int prog_fd;
  17         int err;
  18         int i;
  19         LIBBPF_OPTS(bpf_test_run_opts, topts,
  20                 .data_in = &pkt_v4,
  21                 .data_size_in = sizeof(pkt_v4),
  22                 .repeat = 0xffffffff,
  23         );
  24
  25         for (i = 0; i < ARRAY_SIZE(prog); i++)
  26                 prog[i] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0);
  27         prog[ARRAY_SIZE(prog) - 1] = BPF_EXIT_INSN();
  28
  29         prog_fd = bpf_test_load_program(prog_type, prog, ARRAY_SIZE(prog),
  30                                    "GPL", 0, NULL, 0);
  31         ASSERT_GE(prog_fd, 0, "test-run load");
  32
  33         err = sigaction(SIGALRM, &sigalrm_action, NULL);
  34         ASSERT_OK(err, "test-run-signal-sigaction");
  35
  36         err = setitimer(ITIMER_REAL, &timeo, NULL);
  37         ASSERT_OK(err, "test-run-signal-timer");
  38
  39         err = bpf_prog_test_run_opts(prog_fd, &topts);
  40         ASSERT_LE(topts.duration, 500000000 /* 500ms */,
  41                   "test-run-signal-duration");
  42
  43         signal(SIGALRM, SIG_DFL);
  44 }
  45
  46 void test_signal_pending(void)
  47 {
  48         test_signal_pending_by_type(BPF_PROG_TYPE_SOCKET_FILTER);
  49         test_signal_pending_by_type(BPF_PROG_TYPE_FLOW_DISSECTOR);
  50 }