bpf/prog_tests/dummy_st_ops.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /* Copyright (C) 2021. Huawei Technologies Co., Ltd */
0003 #include <test_progs.h>
0004 #include "dummy_st_ops.skel.h"
0005 #include "trace_dummy_st_ops.skel.h"
0006
0007 /* Need to keep consistent with definition in include/linux/bpf.h */
0008 struct bpf_dummy_ops_state {
0009     int val;
0010 };
0011
0012 static void test_dummy_st_ops_attach(void)
0013 {
0014     struct dummy_st_ops *skel;
0015     struct bpf_link *link;
0016
0017     skel = dummy_st_ops__open_and_load();
0018     if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
0019         return;
0020
0021     link = bpf_map__attach_struct_ops(skel->maps.dummy_1);
0022     ASSERT_EQ(libbpf_get_error(link), -EOPNOTSUPP, "dummy_st_ops_attach");
0023
0024     dummy_st_ops__destroy(skel);
0025 }
0026
0027 static void test_dummy_init_ret_value(void)
0028 {
0029     __u64 args[1] = {0};
0030     LIBBPF_OPTS(bpf_test_run_opts, attr,
0031         .ctx_in = args,
0032         .ctx_size_in = sizeof(args),
0033     );
0034     struct dummy_st_ops *skel;
0035     int fd, err;
0036
0037     skel = dummy_st_ops__open_and_load();
0038     if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
0039         return;
0040
0041     fd = bpf_program__fd(skel->progs.test_1);
0042     err = bpf_prog_test_run_opts(fd, &attr);
0043     ASSERT_OK(err, "test_run");
0044     ASSERT_EQ(attr.retval, 0xf2f3f4f5, "test_ret");
0045
0046     dummy_st_ops__destroy(skel);
0047 }
0048
0049 static void test_dummy_init_ptr_arg(void)
0050 {
0051     int exp_retval = 0xbeef;
0052     struct bpf_dummy_ops_state in_state = {
0053         .val = exp_retval,
0054     };
0055     __u64 args[1] = {(unsigned long)&in_state};
0056     LIBBPF_OPTS(bpf_test_run_opts, attr,
0057         .ctx_in = args,
0058         .ctx_size_in = sizeof(args),
0059     );
0060     struct trace_dummy_st_ops *trace_skel;
0061     struct dummy_st_ops *skel;
0062     int fd, err;
0063
0064     skel = dummy_st_ops__open_and_load();
0065     if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
0066         return;
0067
0068     fd = bpf_program__fd(skel->progs.test_1);
0069
0070     trace_skel = trace_dummy_st_ops__open();
0071     if (!ASSERT_OK_PTR(trace_skel, "trace_dummy_st_ops__open"))
0072         goto done;
0073
0074     err = bpf_program__set_attach_target(trace_skel->progs.fentry_test_1,
0075                          fd, "test_1");
0076     if (!ASSERT_OK(err, "set_attach_target(fentry_test_1)"))
0077         goto done;
0078
0079     err = trace_dummy_st_ops__load(trace_skel);
0080     if (!ASSERT_OK(err, "load(trace_skel)"))
0081         goto done;
0082
0083     err = trace_dummy_st_ops__attach(trace_skel);
0084     if (!ASSERT_OK(err, "attach(trace_skel)"))
0085         goto done;
0086
0087     err = bpf_prog_test_run_opts(fd, &attr);
0088     ASSERT_OK(err, "test_run");
0089     ASSERT_EQ(in_state.val, 0x5a, "test_ptr_ret");
0090     ASSERT_EQ(attr.retval, exp_retval, "test_ret");
0091     ASSERT_EQ(trace_skel->bss->val, exp_retval, "fentry_val");
0092
0093 done:
0094     dummy_st_ops__destroy(skel);
0095     trace_dummy_st_ops__destroy(trace_skel);
0096 }
0097
0098 static void test_dummy_multiple_args(void)
0099 {
0100     __u64 args[5] = {0, -100, 0x8a5f, 'c', 0x1234567887654321ULL};
0101     LIBBPF_OPTS(bpf_test_run_opts, attr,
0102         .ctx_in = args,
0103         .ctx_size_in = sizeof(args),
0104     );
0105     struct dummy_st_ops *skel;
0106     int fd, err;
0107     size_t i;
0108     char name[8];
0109
0110     skel = dummy_st_ops__open_and_load();
0111     if (!ASSERT_OK_PTR(skel, "dummy_st_ops_load"))
0112         return;
0113
0114     fd = bpf_program__fd(skel->progs.test_2);
0115     err = bpf_prog_test_run_opts(fd, &attr);
0116     ASSERT_OK(err, "test_run");
0117     for (i = 0; i < ARRAY_SIZE(args); i++) {
0118         snprintf(name, sizeof(name), "arg %zu", i);
0119         ASSERT_EQ(skel->bss->test_2_args[i], args[i], name);
0120     }
0121
0122     dummy_st_ops__destroy(skel);
0123 }
0124
0125 void test_dummy_st_ops(void)
0126 {
0127     if (test__start_subtest("dummy_st_ops_attach"))
0128         test_dummy_st_ops_attach();
0129     if (test__start_subtest("dummy_init_ret_value"))
0130         test_dummy_init_ret_value();
0131     if (test__start_subtest("dummy_init_ptr_arg"))
0132         test_dummy_init_ptr_arg();
0133     if (test__start_subtest("dummy_multiple_args"))
0134         test_dummy_multiple_args();
0135 }