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

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <test_progs.h>
   3 #include <network_helpers.h>
   4 #include "skb_load_bytes.skel.h"
   5
   6 void test_skb_load_bytes(void)
   7 {
   8         struct skb_load_bytes *skel;
   9         int err, prog_fd, test_result;
  10         struct __sk_buff skb = { 0 };
  11
  12         LIBBPF_OPTS(bpf_test_run_opts, tattr,
  13                 .data_in = &pkt_v4,
  14                 .data_size_in = sizeof(pkt_v4),
  15                 .ctx_in = &skb,
  16                 .ctx_size_in = sizeof(skb),
  17         );
  18
  19         skel = skb_load_bytes__open_and_load();
  20         if (!ASSERT_OK_PTR(skel, "skel_open_and_load"))
  21                 return;
  22
  23         prog_fd = bpf_program__fd(skel->progs.skb_process);
  24         if (!ASSERT_GE(prog_fd, 0, "prog_fd"))
  25                 goto out;
  26
  27         skel->bss->load_offset = (uint32_t)(-1);
  28         err = bpf_prog_test_run_opts(prog_fd, &tattr);
  29         if (!ASSERT_OK(err, "bpf_prog_test_run_opts"))
  30                 goto out;
  31         test_result = skel->bss->test_result;
  32         if (!ASSERT_EQ(test_result, -EFAULT, "offset -1"))
  33                 goto out;
  34
  35         skel->bss->load_offset = (uint32_t)10;
  36         err = bpf_prog_test_run_opts(prog_fd, &tattr);
  37         if (!ASSERT_OK(err, "bpf_prog_test_run_opts"))
  38                 goto out;
  39         test_result = skel->bss->test_result;
  40         if (!ASSERT_EQ(test_result, 0, "offset 10"))
  41                 goto out;
  42
  43 out:
  44         skb_load_bytes__destroy(skel);
  45 }