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

   1// SPDX-License-Identifier: GPL-2.0
   2#include <test_progs.h>
   3
   4static void sigalrm_handler(int s) {}
   5static struct sigaction sigalrm_action = {
   6        .sa_handler = sigalrm_handler,
   7};
   8
   9static void test_signal_pending_by_type(enum bpf_prog_type prog_type)
  10{
  11        struct bpf_insn prog[4096];
  12        struct itimerval timeo = {
  13                .it_value.tv_usec = 100000, /* 100ms */
  14        };
  15        __u32 duration = 0, retval;
  16        int prog_fd;
  17        int err;
  18        int i;
  19
  20        for (i = 0; i < ARRAY_SIZE(prog); i++)
  21                prog[i] = BPF_ALU64_IMM(BPF_MOV, BPF_REG_0, 0);
  22        prog[ARRAY_SIZE(prog) - 1] = BPF_EXIT_INSN();
  23
  24        prog_fd = bpf_load_program(prog_type, prog, ARRAY_SIZE(prog),
  25                                   "GPL", 0, NULL, 0);
  26        CHECK(prog_fd < 0, "test-run", "errno %d\n", errno);
  27
  28        err = sigaction(SIGALRM, &sigalrm_action, NULL);
  29        CHECK(err, "test-run-signal-sigaction", "errno %d\n", errno);
  30
  31        err = setitimer(ITIMER_REAL, &timeo, NULL);
  32        CHECK(err, "test-run-signal-timer", "errno %d\n", errno);
  33
  34        err = bpf_prog_test_run(prog_fd, 0xffffffff, &pkt_v4, sizeof(pkt_v4),
  35                                NULL, NULL, &retval, &duration);
  36        CHECK(duration > 500000000, /* 500ms */
  37              "test-run-signal-duration",
  38              "duration %dns > 500ms\n",
  39              duration);
  40
  41        signal(SIGALRM, SIG_DFL);
  42}
  43
  44void test_signal_pending(enum bpf_prog_type prog_type)
  45{
  46        test_signal_pending_by_type(BPF_PROG_TYPE_SOCKET_FILTER);
  47        test_signal_pending_by_type(BPF_PROG_TYPE_FLOW_DISSECTOR);
  48}
  49