root/tools/testing/selftests/bpf/prog_tests/prog_run_xattr.c

DEFINITIONS

1. test_prog_run_xattr

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <test_progs.h>
   3 
   4 void test_prog_run_xattr(void)
   5 {
   6         const char *file = "./test_pkt_access.o";
   7         struct bpf_object *obj;
   8         char buf[10];
   9         int err;
  10         struct bpf_prog_test_run_attr tattr = {
  11                 .repeat = 1,
  12                 .data_in = &pkt_v4,
  13                 .data_size_in = sizeof(pkt_v4),
  14                 .data_out = buf,
  15                 .data_size_out = 5,
  16         };
  17 
  18         err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj,
  19                             &tattr.prog_fd);
  20         if (CHECK_ATTR(err, "load", "err %d errno %d\n", err, errno))
  21                 return;
  22 
  23         memset(buf, 0, sizeof(buf));
  24 
  25         err = bpf_prog_test_run_xattr(&tattr);
  26         CHECK_ATTR(err != -1 || errno != ENOSPC || tattr.retval, "run",
  27               "err %d errno %d retval %d\n", err, errno, tattr.retval);
  28 
  29         CHECK_ATTR(tattr.data_size_out != sizeof(pkt_v4), "data_size_out",
  30               "incorrect output size, want %lu have %u\n",
  31               sizeof(pkt_v4), tattr.data_size_out);
  32 
  33         CHECK_ATTR(buf[5] != 0, "overflow",
  34               "BPF_PROG_TEST_RUN ignored size hint\n");
  35 
  36         tattr.data_out = NULL;
  37         tattr.data_size_out = 0;
  38         errno = 0;
  39 
  40         err = bpf_prog_test_run_xattr(&tattr);
  41         CHECK_ATTR(err || errno || tattr.retval, "run_no_output",
  42               "err %d errno %d retval %d\n", err, errno, tattr.retval);
  43 
  44         tattr.data_size_out = 1;
  45         err = bpf_prog_test_run_xattr(&tattr);
  46         CHECK_ATTR(err != -EINVAL, "run_wrong_size_out", "err %d\n", err);
  47 
  48         bpf_object__close(obj);
  49 }