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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2022 Facebook */
   3
   4 #include <test_progs.h>
   5 #include <network_helpers.h>
   6 #include "dynptr_fail.skel.h"
   7 #include "dynptr_success.skel.h"
   8
   9 enum test_setup_type {
  10         SETUP_SYSCALL_SLEEP,
  11         SETUP_SKB_PROG,
  12 };
  13
  14 static struct {
  15         const char *prog_name;
  16         enum test_setup_type type;
  17 } success_tests[] = {
  18         {"test_read_write", SETUP_SYSCALL_SLEEP},
  19         {"test_dynptr_data", SETUP_SYSCALL_SLEEP},
  20         {"test_ringbuf", SETUP_SYSCALL_SLEEP},
  21         {"test_skb_readonly", SETUP_SKB_PROG},
  22         {"test_dynptr_skb_data", SETUP_SKB_PROG},
  23         {"test_adjust", SETUP_SYSCALL_SLEEP},
  24         {"test_adjust_err", SETUP_SYSCALL_SLEEP},
  25         {"test_zero_size_dynptr", SETUP_SYSCALL_SLEEP},
  26         {"test_dynptr_is_null", SETUP_SYSCALL_SLEEP},
  27         {"test_dynptr_is_rdonly", SETUP_SKB_PROG},
  28         {"test_dynptr_clone", SETUP_SKB_PROG},
  29         {"test_dynptr_skb_no_buff", SETUP_SKB_PROG},
  30         {"test_dynptr_skb_strcmp", SETUP_SKB_PROG},
  31 };
  32
  33 static void verify_success(const char *prog_name, enum test_setup_type setup_type)
  34 {
  35         struct dynptr_success *skel;
  36         struct bpf_program *prog;
  37         struct bpf_link *link;
  38        int err;
  39
  40         skel = dynptr_success__open();
  41         if (!ASSERT_OK_PTR(skel, "dynptr_success__open"))
  42                 return;
  43
  44         skel->bss->pid = getpid();
  45
  46         prog = bpf_object__find_program_by_name(skel->obj, prog_name);
  47         if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
  48                 goto cleanup;
  49
  50        bpf_program__set_autoload(prog, true);
  51
  52         err = dynptr_success__load(skel);
  53         if (!ASSERT_OK(err, "dynptr_success__load"))
  54                 goto cleanup;
  55
  56         switch (setup_type) {
  57         case SETUP_SYSCALL_SLEEP:
  58                 link = bpf_program__attach(prog);
  59                 if (!ASSERT_OK_PTR(link, "bpf_program__attach"))
  60                         goto cleanup;
  61
  62                 usleep(1);
  63
  64                 bpf_link__destroy(link);
  65                 break;
  66         case SETUP_SKB_PROG:
  67         {
  68                 int prog_fd;
  69                 char buf[64];
  70
  71                 LIBBPF_OPTS(bpf_test_run_opts, topts,
  72                             .data_in = &pkt_v4,
  73                             .data_size_in = sizeof(pkt_v4),
  74                             .data_out = buf,
  75                             .data_size_out = sizeof(buf),
  76                             .repeat = 1,
  77                 );
  78
  79                 prog_fd = bpf_program__fd(prog);
  80                 if (!ASSERT_GE(prog_fd, 0, "prog_fd"))
  81                         goto cleanup;
  82
  83                 err = bpf_prog_test_run_opts(prog_fd, &topts);
  84
  85                 if (!ASSERT_OK(err, "test_run"))
  86                         goto cleanup;
  87
  88                 break;
  89         }
  90         }
  91
  92         ASSERT_EQ(skel->bss->err, 0, "err");
  93
  94 cleanup:
  95         dynptr_success__destroy(skel);
  96 }
  97
  98 void test_dynptr(void)
  99 {
 100         int i;
 101
 102         for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
 103                 if (!test__start_subtest(success_tests[i].prog_name))
 104                         continue;
 105
 106                 verify_success(success_tests[i].prog_name, success_tests[i].type);
 107         }
 108
 109         RUN_TESTS(dynptr_fail);
 110 }