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

   1// SPDX-License-Identifier: GPL-2.0
   2#include <test_progs.h>
   3#include <network_helpers.h>
   4
   5static void sigalrm_handler(int s) {}
   6static struct sigaction sigalrm_action = {
   7        .sa_handler = sigalrm_handler,
   8};
   9
  10static 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
  45void 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}
  50