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 SETUP_XDP_PROG,
14 };
15
16 static struct {
17 const char *prog_name;
18 enum test_setup_type type;
19 } success_tests[] = {
20 {"test_read_write", SETUP_SYSCALL_SLEEP},
21 {"test_dynptr_data", SETUP_SYSCALL_SLEEP},
22 {"test_dynptr_copy", SETUP_SYSCALL_SLEEP},
23 {"test_dynptr_copy_xdp", SETUP_XDP_PROG},
24 {"test_dynptr_memset_zero", SETUP_SYSCALL_SLEEP},
25 {"test_dynptr_memset_notzero", SETUP_SYSCALL_SLEEP},
26 {"test_dynptr_memset_zero_offset", SETUP_SYSCALL_SLEEP},
27 {"test_dynptr_memset_zero_adjusted", SETUP_SYSCALL_SLEEP},
28 {"test_dynptr_memset_overflow", SETUP_SYSCALL_SLEEP},
29 {"test_dynptr_memset_overflow_offset", SETUP_SYSCALL_SLEEP},
30 {"test_dynptr_memset_readonly", SETUP_SKB_PROG},
31 {"test_dynptr_memset_xdp_chunks", SETUP_XDP_PROG},
32 {"test_ringbuf", SETUP_SYSCALL_SLEEP},
33 {"test_skb_readonly", SETUP_SKB_PROG},
34 {"test_dynptr_skb_data", SETUP_SKB_PROG},
35 {"test_adjust", SETUP_SYSCALL_SLEEP},
36 {"test_adjust_err", SETUP_SYSCALL_SLEEP},
37 {"test_zero_size_dynptr", SETUP_SYSCALL_SLEEP},
38 {"test_dynptr_is_null", SETUP_SYSCALL_SLEEP},
39 {"test_dynptr_is_rdonly", SETUP_SKB_PROG},
40 {"test_dynptr_clone", SETUP_SKB_PROG},
41 {"test_dynptr_skb_no_buff", SETUP_SKB_PROG},
42 {"test_dynptr_skb_strcmp", SETUP_SKB_PROG},
43 {"test_dynptr_skb_tp_btf", SETUP_SKB_PROG_TP},
44 {"test_probe_read_user_dynptr", SETUP_XDP_PROG},
45 {"test_probe_read_kernel_dynptr", SETUP_XDP_PROG},
46 {"test_probe_read_user_str_dynptr", SETUP_XDP_PROG},
47 {"test_probe_read_kernel_str_dynptr", SETUP_XDP_PROG},
48 {"test_copy_from_user_dynptr", SETUP_SYSCALL_SLEEP},
49 {"test_copy_from_user_str_dynptr", SETUP_SYSCALL_SLEEP},
50 {"test_copy_from_user_task_dynptr", SETUP_SYSCALL_SLEEP},
51 {"test_copy_from_user_task_str_dynptr", SETUP_SYSCALL_SLEEP},
52 };
53
54 #define PAGE_SIZE_64K 65536
55
verify_success(const char * prog_name,enum test_setup_type setup_type)56 static void verify_success(const char *prog_name, enum test_setup_type setup_type)
57 {
58 char user_data[384] = {[0 ... 382] = 'a', '\0'};
59 struct dynptr_success *skel;
60 struct bpf_program *prog;
61 struct bpf_link *link;
62 int err;
63
64 skel = dynptr_success__open();
65 if (!ASSERT_OK_PTR(skel, "dynptr_success__open"))
66 return;
67
68 skel->bss->pid = getpid();
69
70 prog = bpf_object__find_program_by_name(skel->obj, prog_name);
71 if (!ASSERT_OK_PTR(prog, "bpf_object__find_program_by_name"))
72 goto cleanup;
73
74 bpf_program__set_autoload(prog, true);
75
76 err = dynptr_success__load(skel);
77 if (!ASSERT_OK(err, "dynptr_success__load"))
78 goto cleanup;
79
80 skel->bss->user_ptr = user_data;
81 skel->data->test_len[0] = sizeof(user_data);
82 memcpy(skel->bss->expected_str, user_data, sizeof(user_data));
83
84 switch (setup_type) {
85 case SETUP_SYSCALL_SLEEP:
86 link = bpf_program__attach(prog);
87 if (!ASSERT_OK_PTR(link, "bpf_program__attach"))
88 goto cleanup;
89
90 usleep(1);
91
92 bpf_link__destroy(link);
93 break;
94 case SETUP_SKB_PROG:
95 {
96 int prog_fd;
97 char buf[64];
98
99 LIBBPF_OPTS(bpf_test_run_opts, topts,
100 .data_in = &pkt_v4,
101 .data_size_in = sizeof(pkt_v4),
102 .data_out = buf,
103 .data_size_out = sizeof(buf),
104 .repeat = 1,
105 );
106
107 prog_fd = bpf_program__fd(prog);
108 if (!ASSERT_GE(prog_fd, 0, "prog_fd"))
109 goto cleanup;
110
111 err = bpf_prog_test_run_opts(prog_fd, &topts);
112
113 if (!ASSERT_OK(err, "test_run"))
114 goto cleanup;
115
116 break;
117 }
118 case SETUP_SKB_PROG_TP:
119 {
120 struct __sk_buff skb = {};
121 struct bpf_object *obj;
122 int aux_prog_fd;
123
124 /* Just use its test_run to trigger kfree_skb tracepoint */
125 err = bpf_prog_test_load("./test_pkt_access.bpf.o", BPF_PROG_TYPE_SCHED_CLS,
126 &obj, &aux_prog_fd);
127 if (!ASSERT_OK(err, "prog_load sched cls"))
128 goto cleanup;
129
130 LIBBPF_OPTS(bpf_test_run_opts, topts,
131 .data_in = &pkt_v4,
132 .data_size_in = sizeof(pkt_v4),
133 .ctx_in = &skb,
134 .ctx_size_in = sizeof(skb),
135 );
136
137 link = bpf_program__attach(prog);
138 if (!ASSERT_OK_PTR(link, "bpf_program__attach"))
139 goto cleanup;
140
141 err = bpf_prog_test_run_opts(aux_prog_fd, &topts);
142 bpf_link__destroy(link);
143
144 if (!ASSERT_OK(err, "test_run"))
145 goto cleanup;
146
147 break;
148 }
149 case SETUP_XDP_PROG:
150 {
151 char data[90000];
152 int err, prog_fd;
153 LIBBPF_OPTS(bpf_test_run_opts, opts,
154 .data_in = &data,
155 .repeat = 1,
156 );
157
158 if (getpagesize() == PAGE_SIZE_64K)
159 opts.data_size_in = sizeof(data);
160 else
161 opts.data_size_in = 5000;
162
163 prog_fd = bpf_program__fd(prog);
164 err = bpf_prog_test_run_opts(prog_fd, &opts);
165
166 if (!ASSERT_OK(err, "test_run"))
167 goto cleanup;
168
169 break;
170 }
171 }
172
173 ASSERT_EQ(skel->bss->err, 0, "err");
174
175 cleanup:
176 dynptr_success__destroy(skel);
177 }
178
test_dynptr(void)179 void test_dynptr(void)
180 {
181 int i;
182
183 for (i = 0; i < ARRAY_SIZE(success_tests); i++) {
184 if (!test__start_subtest(success_tests[i].prog_name))
185 continue;
186
187 verify_success(success_tests[i].prog_name, success_tests[i].type);
188 }
189
190 RUN_TESTS(dynptr_fail);
191 }
192