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         SETUP_SKB_PROG_TP,
  13 };
  14
  15 static struct {
  16         const char *prog_name;
  17         enum test_setup_type type;
  18 } success_tests[] = {
  19         {"test_read_write", SETUP_SYSCALL_SLEEP},
  20         {"test_dynptr_data", SETUP_SYSCALL_SLEEP},
  21         {"test_ringbuf", SETUP_SYSCALL_SLEEP},
  22         {"test_skb_readonly", SETUP_SKB_PROG},
  23         {"test_dynptr_skb_data", SETUP_SKB_PROG},
  24         {"test_adjust", SETUP_SYSCALL_SLEEP},
  25         {"test_adjust_err", SETUP_SYSCALL_SLEEP},
  26         {"test_zero_size_dynptr", SETUP_SYSCALL_SLEEP},
  27         {"test_dynptr_is_null", SETUP_SYSCALL_SLEEP},
  28         {"test_dynptr_is_rdonly", SETUP_SKB_PROG},
  29         {"test_dynptr_clone", SETUP_SKB_PROG},
  30         {"test_dynptr_skb_no_buff", SETUP_SKB_PROG},
  31         {"test_dynptr_skb_strcmp", SETUP_SKB_PROG},
  32         {"test_dynptr_skb_tp_btf", SETUP_SKB_PROG_TP},
  33 };
  34
  35 static void verify_success(const char *prog_name, enum test_setup_type setup_type)
  36 {
  37         struct dynptr_success *skel;
  38         struct bpf_program *prog;
  39         struct bpf_link *link;
  40         int err;
  41
  42         skel = dynptr_success__open();
  43         if (!ASSERT_OK_PTR(skel, "dynptr_success__open"))
  44                 return;
  45
  46         skel->bss->pid = getpid();
  47
  48         prog = bpf_object__find_program_by_name(skel->obj, prog_name);
  49         if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
  50                 goto cleanup;
  51
  52         bpf_program__set_autoload(prog, true);
  53
  54         err = dynptr_success__load(skel);
  55         if (!ASSERT_OK(err, "dynptr_success__load"))
  56                 goto cleanup;
  57
  58         switch (setup_type) {
  59         case SETUP_SYSCALL_SLEEP:
  60                 link = bpf_program__attach(prog);
  61                 if (!ASSERT_OK_PTR(link, "bpf_program__attach"))
  62                         goto cleanup;
  63
  64                 usleep(1);
  65
  66                 bpf_link__destroy(link);
  67                 break;
  68         case SETUP_SKB_PROG:
  69         {
  70                 int prog_fd;
  71                 char buf[64];
  72
  73                 LIBBPF_OPTS(bpf_test_run_opts, topts,
  74                             .data_in = &pkt_v4,
  75                             .data_size_in = sizeof(pkt_v4),
  76                             .data_out = buf,
  77                             .data_size_out = sizeof(buf),
  78                             .repeat = 1,
  79                 );
  80
  81                 prog_fd = bpf_program__fd(prog);
  82                 if (!ASSERT_GE(prog_fd, 0, "prog_fd"))
  83                         goto cleanup;
  84
  85                 err = bpf_prog_test_run_opts(prog_fd, &topts);
  86
  87                 if (!ASSERT_OK(err, "test_run"))
  88                         goto cleanup;
  89
  90                 break;
  91         }
  92         case SETUP_SKB_PROG_TP:
  93         {
  94                 struct __sk_buff skb = {};
  95                 struct bpf_object *obj;
  96                 int aux_prog_fd;
  97
  98                 /* Just use its test_run to trigger kfree_skb tracepoint */
  99                 err = bpf_prog_test_load("./test_pkt_access.bpf.o", BPF_PROG_TYPE_SCHED_CLS,
 100                                          &obj, &aux_prog_fd);
 101                 if (!ASSERT_OK(err, "prog_load sched cls"))
 102                         goto cleanup;
 103
 104                 LIBBPF_OPTS(bpf_test_run_opts, topts,
 105                             .data_in = &pkt_v4,
 106                             .data_size_in = sizeof(pkt_v4),
 107                             .ctx_in = &skb,
 108                             .ctx_size_in = sizeof(skb),
 109                 );
 110
 111                 link = bpf_program__attach(prog);
 112                 if (!ASSERT_OK_PTR(link, "bpf_program__attach"))
 113                         goto cleanup;
 114
 115                 err = bpf_prog_test_run_opts(aux_prog_fd, &topts);
 116                 bpf_link__destroy(link);
 117
 118                 if (!ASSERT_OK(err, "test_run"))
 119                         goto cleanup;
 120
 121                 break;
 122         }
 123         }
 124
 125         ASSERT_EQ(skel->bss->err, 0, "err");
 126
 127 cleanup:
 128         dynptr_success__destroy(skel);
 129 }
 130
 131 void test_dynptr(void)
 132 {
 133         int i;
 134
 135         for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
 136                 if (!test__start_subtest(success_tests[i].prog_name))
 137                         continue;
 138
 139                 verify_success(success_tests[i].prog_name, success_tests[i].type);
 140         }
 141
 142         RUN_TESTS(dynptr_fail);
 143 }