Loading...
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
3
4#define _GNU_SOURCE
5#include <cgroup_helpers.h>
6#include <test_progs.h>
7
8#include "cgrp_kfunc_failure.skel.h"
9#include "cgrp_kfunc_success.skel.h"
10
11static struct cgrp_kfunc_success *open_load_cgrp_kfunc_skel(void)
12{
13 struct cgrp_kfunc_success *skel;
14 int err;
15
16 skel = cgrp_kfunc_success__open();
17 if (!ASSERT_OK_PTR(skel, "skel_open"))
18 return NULL;
19
20 skel->bss->pid = getpid();
21
22 err = cgrp_kfunc_success__load(skel);
23 if (!ASSERT_OK(err, "skel_load"))
24 goto cleanup;
25
26 return skel;
27
28cleanup:
29 cgrp_kfunc_success__destroy(skel);
30 return NULL;
31}
32
33static int mkdir_rm_test_dir(void)
34{
35 int fd;
36 const char *cgrp_path = "cgrp_kfunc";
37
38 fd = create_and_get_cgroup(cgrp_path);
39 if (!ASSERT_GT(fd, 0, "mkdir_cgrp_fd"))
40 return -1;
41
42 close(fd);
43 remove_cgroup(cgrp_path);
44
45 return 0;
46}
47
48static void run_success_test(const char *prog_name)
49{
50 struct cgrp_kfunc_success *skel;
51 struct bpf_program *prog;
52 struct bpf_link *link = NULL;
53
54 skel = open_load_cgrp_kfunc_skel();
55 if (!ASSERT_OK_PTR(skel, "open_load_skel"))
56 return;
57
58 if (!ASSERT_OK(skel->bss->err, "pre_mkdir_err"))
59 goto cleanup;
60
61 prog = bpf_object__find_program_by_name(skel->obj, prog_name);
62 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
63 goto cleanup;
64
65 link = bpf_program__attach(prog);
66 if (!ASSERT_OK_PTR(link, "attached_link"))
67 goto cleanup;
68
69 ASSERT_EQ(skel->bss->invocations, 0, "pre_rmdir_count");
70 if (!ASSERT_OK(mkdir_rm_test_dir(), "cgrp_mkdir"))
71 goto cleanup;
72
73 ASSERT_EQ(skel->bss->invocations, 1, "post_rmdir_count");
74 ASSERT_OK(skel->bss->err, "post_rmdir_err");
75
76cleanup:
77 bpf_link__destroy(link);
78 cgrp_kfunc_success__destroy(skel);
79}
80
81static const char * const success_tests[] = {
82 "test_cgrp_acquire_release_argument",
83 "test_cgrp_acquire_leave_in_map",
84 "test_cgrp_xchg_release",
85 "test_cgrp_get_release",
86 "test_cgrp_get_ancestors",
87 "test_cgrp_from_id",
88};
89
90void test_cgrp_kfunc(void)
91{
92 int i, err;
93
94 err = setup_cgroup_environment();
95 if (!ASSERT_OK(err, "cgrp_env_setup"))
96 goto cleanup;
97
98 for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
99 if (!test__start_subtest(success_tests[i]))
100 continue;
101
102 run_success_test(success_tests[i]);
103 }
104
105 RUN_TESTS(cgrp_kfunc_failure);
106
107cleanup:
108 cleanup_cgroup_environment();
109}
1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */
3
4#define _GNU_SOURCE
5#include <cgroup_helpers.h>
6#include <test_progs.h>
7
8#include "cgrp_kfunc_failure.skel.h"
9#include "cgrp_kfunc_success.skel.h"
10
11static size_t log_buf_sz = 1 << 20; /* 1 MB */
12static char obj_log_buf[1048576];
13
14static struct cgrp_kfunc_success *open_load_cgrp_kfunc_skel(void)
15{
16 struct cgrp_kfunc_success *skel;
17 int err;
18
19 skel = cgrp_kfunc_success__open();
20 if (!ASSERT_OK_PTR(skel, "skel_open"))
21 return NULL;
22
23 skel->bss->pid = getpid();
24
25 err = cgrp_kfunc_success__load(skel);
26 if (!ASSERT_OK(err, "skel_load"))
27 goto cleanup;
28
29 return skel;
30
31cleanup:
32 cgrp_kfunc_success__destroy(skel);
33 return NULL;
34}
35
36static int mkdir_rm_test_dir(void)
37{
38 int fd;
39 const char *cgrp_path = "cgrp_kfunc";
40
41 fd = create_and_get_cgroup(cgrp_path);
42 if (!ASSERT_GT(fd, 0, "mkdir_cgrp_fd"))
43 return -1;
44
45 close(fd);
46 remove_cgroup(cgrp_path);
47
48 return 0;
49}
50
51static void run_success_test(const char *prog_name)
52{
53 struct cgrp_kfunc_success *skel;
54 struct bpf_program *prog;
55 struct bpf_link *link = NULL;
56
57 skel = open_load_cgrp_kfunc_skel();
58 if (!ASSERT_OK_PTR(skel, "open_load_skel"))
59 return;
60
61 if (!ASSERT_OK(skel->bss->err, "pre_mkdir_err"))
62 goto cleanup;
63
64 prog = bpf_object__find_program_by_name(skel->obj, prog_name);
65 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
66 goto cleanup;
67
68 link = bpf_program__attach(prog);
69 if (!ASSERT_OK_PTR(link, "attached_link"))
70 goto cleanup;
71
72 ASSERT_EQ(skel->bss->invocations, 0, "pre_rmdir_count");
73 if (!ASSERT_OK(mkdir_rm_test_dir(), "cgrp_mkdir"))
74 goto cleanup;
75
76 ASSERT_EQ(skel->bss->invocations, 1, "post_rmdir_count");
77 ASSERT_OK(skel->bss->err, "post_rmdir_err");
78
79cleanup:
80 bpf_link__destroy(link);
81 cgrp_kfunc_success__destroy(skel);
82}
83
84static const char * const success_tests[] = {
85 "test_cgrp_acquire_release_argument",
86 "test_cgrp_acquire_leave_in_map",
87 "test_cgrp_xchg_release",
88 "test_cgrp_get_release",
89 "test_cgrp_get_ancestors",
90};
91
92static struct {
93 const char *prog_name;
94 const char *expected_err_msg;
95} failure_tests[] = {
96 {"cgrp_kfunc_acquire_untrusted", "R1 must be referenced or trusted"},
97 {"cgrp_kfunc_acquire_fp", "arg#0 pointer type STRUCT cgroup must point"},
98 {"cgrp_kfunc_acquire_unsafe_kretprobe", "reg type unsupported for arg#0 function"},
99 {"cgrp_kfunc_acquire_trusted_walked", "R1 must be referenced or trusted"},
100 {"cgrp_kfunc_acquire_null", "arg#0 pointer type STRUCT cgroup must point"},
101 {"cgrp_kfunc_acquire_unreleased", "Unreleased reference"},
102 {"cgrp_kfunc_get_non_kptr_param", "arg#0 expected pointer to map value"},
103 {"cgrp_kfunc_get_non_kptr_acquired", "arg#0 expected pointer to map value"},
104 {"cgrp_kfunc_get_null", "arg#0 expected pointer to map value"},
105 {"cgrp_kfunc_xchg_unreleased", "Unreleased reference"},
106 {"cgrp_kfunc_get_unreleased", "Unreleased reference"},
107 {"cgrp_kfunc_release_untrusted", "arg#0 is untrusted_ptr_or_null_ expected ptr_ or socket"},
108 {"cgrp_kfunc_release_fp", "arg#0 pointer type STRUCT cgroup must point"},
109 {"cgrp_kfunc_release_null", "arg#0 is ptr_or_null_ expected ptr_ or socket"},
110 {"cgrp_kfunc_release_unacquired", "release kernel function bpf_cgroup_release expects"},
111};
112
113static void verify_fail(const char *prog_name, const char *expected_err_msg)
114{
115 LIBBPF_OPTS(bpf_object_open_opts, opts);
116 struct cgrp_kfunc_failure *skel;
117 int err, i;
118
119 opts.kernel_log_buf = obj_log_buf;
120 opts.kernel_log_size = log_buf_sz;
121 opts.kernel_log_level = 1;
122
123 skel = cgrp_kfunc_failure__open_opts(&opts);
124 if (!ASSERT_OK_PTR(skel, "cgrp_kfunc_failure__open_opts"))
125 goto cleanup;
126
127 for (i = 0; i < ARRAY_SIZE(failure_tests); i++) {
128 struct bpf_program *prog;
129 const char *curr_name = failure_tests[i].prog_name;
130
131 prog = bpf_object__find_program_by_name(skel->obj, curr_name);
132 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
133 goto cleanup;
134
135 bpf_program__set_autoload(prog, !strcmp(curr_name, prog_name));
136 }
137
138 err = cgrp_kfunc_failure__load(skel);
139 if (!ASSERT_ERR(err, "unexpected load success"))
140 goto cleanup;
141
142 if (!ASSERT_OK_PTR(strstr(obj_log_buf, expected_err_msg), "expected_err_msg")) {
143 fprintf(stderr, "Expected err_msg: %s\n", expected_err_msg);
144 fprintf(stderr, "Verifier output: %s\n", obj_log_buf);
145 }
146
147cleanup:
148 cgrp_kfunc_failure__destroy(skel);
149}
150
151void test_cgrp_kfunc(void)
152{
153 int i, err;
154
155 err = setup_cgroup_environment();
156 if (!ASSERT_OK(err, "cgrp_env_setup"))
157 goto cleanup;
158
159 for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
160 if (!test__start_subtest(success_tests[i]))
161 continue;
162
163 run_success_test(success_tests[i]);
164 }
165
166 for (i = 0; i < ARRAY_SIZE(failure_tests); i++) {
167 if (!test__start_subtest(failure_tests[i].prog_name))
168 continue;
169
170 verify_fail(failure_tests[i].prog_name, failure_tests[i].expected_err_msg);
171 }
172
173cleanup:
174 cleanup_cgroup_environment();
175}