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         __u32 duration = 0, retval;
  17         int prog_fd;
  18         int err;
  19         int i;
  20
  21         for (i = 0; i < ARRAY_SIZE(prog); i++)
  22                 prog[i] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0);
  23         prog[ARRAY_SIZE(prog) - 1] = BPF_EXIT_INSN();
  24
  25         prog_fd = bpf_load_program(prog_type, prog, ARRAY_SIZE(prog),
  26                                    "GPL", 0, NULL, 0);
  27         CHECK(prog_fd < 0, "test-run", "errno %d\n", errno);
  28
  29         err = sigaction(SIGALRM, &sigalrm_action, NULL);
  30         CHECK(err, "test-run-signal-sigaction", "errno %d\n", errno);
  31
  32         err = setitimer(ITIMER_REAL, &timeo, NULL);
  33         CHECK(err, "test-run-signal-timer", "errno %d\n", errno);
  34
  35         err = bpf_prog_test_run(prog_fd, 0xffffffff, &pkt_v4, sizeof(pkt_v4),
  36                                 NULL, NULL, &retval, &duration);
  37         CHECK(duration > 500000000, /* 500ms */
  38               "test-run-signal-duration",
  39               "duration %dns > 500ms\n",
  40               duration);
  41
  42         signal(SIGALRM, SIG_DFL);
  43 }
  44
  45 void test_signal_pending(enum bpf_prog_type prog_type)
  46 {
  47         test_signal_pending_by_type(BPF_PROG_TYPE_SOCKET_FILTER);
  48         test_signal_pending_by_type(BPF_PROG_TYPE_FLOW_DISSECTOR);
  49 }