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1// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
2/* Copyright (C) 2019 Netronome Systems, Inc. */
3/* Copyright (C) 2020 Facebook, Inc. */
4#include <ctype.h>
5#include <stdlib.h>
6#include <string.h>
7#include <errno.h>
8#include <bpf/bpf.h>
9#include <bpf/libbpf.h>
10#include "test_progs.h"
11#include "testing_helpers.h"
12#include <linux/membarrier.h>
13
14int parse_num_list(const char *s, bool **num_set, int *num_set_len)
15{
16 int i, set_len = 0, new_len, num, start = 0, end = -1;
17 bool *set = NULL, *tmp, parsing_end = false;
18 char *next;
19
20 while (s[0]) {
21 errno = 0;
22 num = strtol(s, &next, 10);
23 if (errno)
24 return -errno;
25
26 if (parsing_end)
27 end = num;
28 else
29 start = num;
30
31 if (!parsing_end && *next == '-') {
32 s = next + 1;
33 parsing_end = true;
34 continue;
35 } else if (*next == ',') {
36 parsing_end = false;
37 s = next + 1;
38 end = num;
39 } else if (*next == '\0') {
40 parsing_end = false;
41 s = next;
42 end = num;
43 } else {
44 return -EINVAL;
45 }
46
47 if (start > end)
48 return -EINVAL;
49
50 if (end + 1 > set_len) {
51 new_len = end + 1;
52 tmp = realloc(set, new_len);
53 if (!tmp) {
54 free(set);
55 return -ENOMEM;
56 }
57 for (i = set_len; i < start; i++)
58 tmp[i] = false;
59 set = tmp;
60 set_len = new_len;
61 }
62 for (i = start; i <= end; i++)
63 set[i] = true;
64 }
65
66 if (!set || parsing_end)
67 return -EINVAL;
68
69 *num_set = set;
70 *num_set_len = set_len;
71
72 return 0;
73}
74
75static int do_insert_test(struct test_filter_set *set,
76 char *test_str,
77 char *subtest_str)
78{
79 struct test_filter *tmp, *test;
80 char **ctmp;
81 int i;
82
83 for (i = 0; i < set->cnt; i++) {
84 test = &set->tests[i];
85
86 if (strcmp(test_str, test->name) == 0) {
87 free(test_str);
88 goto subtest;
89 }
90 }
91
92 tmp = realloc(set->tests, sizeof(*test) * (set->cnt + 1));
93 if (!tmp)
94 return -ENOMEM;
95
96 set->tests = tmp;
97 test = &set->tests[set->cnt];
98
99 test->name = test_str;
100 test->subtests = NULL;
101 test->subtest_cnt = 0;
102
103 set->cnt++;
104
105subtest:
106 if (!subtest_str)
107 return 0;
108
109 for (i = 0; i < test->subtest_cnt; i++) {
110 if (strcmp(subtest_str, test->subtests[i]) == 0) {
111 free(subtest_str);
112 return 0;
113 }
114 }
115
116 ctmp = realloc(test->subtests,
117 sizeof(*test->subtests) * (test->subtest_cnt + 1));
118 if (!ctmp)
119 return -ENOMEM;
120
121 test->subtests = ctmp;
122 test->subtests[test->subtest_cnt] = subtest_str;
123
124 test->subtest_cnt++;
125
126 return 0;
127}
128
129static int insert_test(struct test_filter_set *set,
130 char *test_spec,
131 bool is_glob_pattern)
132{
133 char *pattern, *subtest_str, *ext_test_str, *ext_subtest_str = NULL;
134 int glob_chars = 0;
135
136 if (is_glob_pattern) {
137 pattern = "%s";
138 } else {
139 pattern = "*%s*";
140 glob_chars = 2;
141 }
142
143 subtest_str = strchr(test_spec, '/');
144 if (subtest_str) {
145 *subtest_str = '\0';
146 subtest_str += 1;
147 }
148
149 ext_test_str = malloc(strlen(test_spec) + glob_chars + 1);
150 if (!ext_test_str)
151 goto err;
152
153 sprintf(ext_test_str, pattern, test_spec);
154
155 if (subtest_str) {
156 ext_subtest_str = malloc(strlen(subtest_str) + glob_chars + 1);
157 if (!ext_subtest_str)
158 goto err;
159
160 sprintf(ext_subtest_str, pattern, subtest_str);
161 }
162
163 return do_insert_test(set, ext_test_str, ext_subtest_str);
164
165err:
166 free(ext_test_str);
167 free(ext_subtest_str);
168
169 return -ENOMEM;
170}
171
172int parse_test_list_file(const char *path,
173 struct test_filter_set *set,
174 bool is_glob_pattern)
175{
176 char *buf = NULL, *capture_start, *capture_end, *scan_end;
177 size_t buflen = 0;
178 int err = 0;
179 FILE *f;
180
181 f = fopen(path, "r");
182 if (!f) {
183 err = -errno;
184 fprintf(stderr, "Failed to open '%s': %d\n", path, err);
185 return err;
186 }
187
188 while (getline(&buf, &buflen, f) != -1) {
189 capture_start = buf;
190
191 while (isspace(*capture_start))
192 ++capture_start;
193
194 capture_end = capture_start;
195 scan_end = capture_start;
196
197 while (*scan_end && *scan_end != '#') {
198 if (!isspace(*scan_end))
199 capture_end = scan_end;
200
201 ++scan_end;
202 }
203
204 if (capture_end == capture_start)
205 continue;
206
207 *(++capture_end) = '\0';
208
209 err = insert_test(set, capture_start, is_glob_pattern);
210 if (err)
211 break;
212 }
213
214 fclose(f);
215 return err;
216}
217
218int parse_test_list(const char *s,
219 struct test_filter_set *set,
220 bool is_glob_pattern)
221{
222 char *input, *state = NULL, *test_spec;
223 int err = 0;
224
225 input = strdup(s);
226 if (!input)
227 return -ENOMEM;
228
229 while ((test_spec = strtok_r(state ? NULL : input, ",", &state))) {
230 err = insert_test(set, test_spec, is_glob_pattern);
231 if (err)
232 break;
233 }
234
235 free(input);
236 return err;
237}
238
239__u32 link_info_prog_id(const struct bpf_link *link, struct bpf_link_info *info)
240{
241 __u32 info_len = sizeof(*info);
242 int err;
243
244 memset(info, 0, sizeof(*info));
245 err = bpf_link_get_info_by_fd(bpf_link__fd(link), info, &info_len);
246 if (err) {
247 printf("failed to get link info: %d\n", -errno);
248 return 0;
249 }
250 return info->prog_id;
251}
252
253int extra_prog_load_log_flags = 0;
254
255int bpf_prog_test_load(const char *file, enum bpf_prog_type type,
256 struct bpf_object **pobj, int *prog_fd)
257{
258 LIBBPF_OPTS(bpf_object_open_opts, opts,
259 .kernel_log_level = extra_prog_load_log_flags,
260 );
261 struct bpf_object *obj;
262 struct bpf_program *prog;
263 __u32 flags;
264 int err;
265
266 obj = bpf_object__open_file(file, &opts);
267 if (!obj)
268 return -errno;
269
270 prog = bpf_object__next_program(obj, NULL);
271 if (!prog) {
272 err = -ENOENT;
273 goto err_out;
274 }
275
276 if (type != BPF_PROG_TYPE_UNSPEC && bpf_program__type(prog) != type)
277 bpf_program__set_type(prog, type);
278
279 flags = bpf_program__flags(prog) | BPF_F_TEST_RND_HI32 | BPF_F_TEST_REG_INVARIANTS;
280 bpf_program__set_flags(prog, flags);
281
282 err = bpf_object__load(obj);
283 if (err)
284 goto err_out;
285
286 *pobj = obj;
287 *prog_fd = bpf_program__fd(prog);
288
289 return 0;
290err_out:
291 bpf_object__close(obj);
292 return err;
293}
294
295int bpf_test_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
296 size_t insns_cnt, const char *license,
297 __u32 kern_version, char *log_buf,
298 size_t log_buf_sz)
299{
300 LIBBPF_OPTS(bpf_prog_load_opts, opts,
301 .kern_version = kern_version,
302 .prog_flags = BPF_F_TEST_RND_HI32 | BPF_F_TEST_REG_INVARIANTS,
303 .log_level = extra_prog_load_log_flags,
304 .log_buf = log_buf,
305 .log_size = log_buf_sz,
306 );
307
308 return bpf_prog_load(type, NULL, license, insns, insns_cnt, &opts);
309}
310
311__u64 read_perf_max_sample_freq(void)
312{
313 __u64 sample_freq = 5000; /* fallback to 5000 on error */
314 FILE *f;
315
316 f = fopen("/proc/sys/kernel/perf_event_max_sample_rate", "r");
317 if (f == NULL) {
318 printf("Failed to open /proc/sys/kernel/perf_event_max_sample_rate: err %d\n"
319 "return default value: 5000\n", -errno);
320 return sample_freq;
321 }
322 if (fscanf(f, "%llu", &sample_freq) != 1) {
323 printf("Failed to parse /proc/sys/kernel/perf_event_max_sample_rate: err %d\n"
324 "return default value: 5000\n", -errno);
325 }
326
327 fclose(f);
328 return sample_freq;
329}
330
331static int finit_module(int fd, const char *param_values, int flags)
332{
333 return syscall(__NR_finit_module, fd, param_values, flags);
334}
335
336static int delete_module(const char *name, int flags)
337{
338 return syscall(__NR_delete_module, name, flags);
339}
340
341int unload_bpf_testmod(bool verbose)
342{
343 if (kern_sync_rcu())
344 fprintf(stdout, "Failed to trigger kernel-side RCU sync!\n");
345 if (delete_module("bpf_testmod", 0)) {
346 if (errno == ENOENT) {
347 if (verbose)
348 fprintf(stdout, "bpf_testmod.ko is already unloaded.\n");
349 return -1;
350 }
351 fprintf(stdout, "Failed to unload bpf_testmod.ko from kernel: %d\n", -errno);
352 return -1;
353 }
354 if (verbose)
355 fprintf(stdout, "Successfully unloaded bpf_testmod.ko.\n");
356 return 0;
357}
358
359int load_bpf_testmod(bool verbose)
360{
361 int fd;
362
363 if (verbose)
364 fprintf(stdout, "Loading bpf_testmod.ko...\n");
365
366 fd = open("bpf_testmod.ko", O_RDONLY);
367 if (fd < 0) {
368 fprintf(stdout, "Can't find bpf_testmod.ko kernel module: %d\n", -errno);
369 return -ENOENT;
370 }
371 if (finit_module(fd, "", 0)) {
372 fprintf(stdout, "Failed to load bpf_testmod.ko into the kernel: %d\n", -errno);
373 close(fd);
374 return -EINVAL;
375 }
376 close(fd);
377
378 if (verbose)
379 fprintf(stdout, "Successfully loaded bpf_testmod.ko.\n");
380 return 0;
381}
382
383/*
384 * Trigger synchronize_rcu() in kernel.
385 */
386int kern_sync_rcu(void)
387{
388 return syscall(__NR_membarrier, MEMBARRIER_CMD_SHARED, 0, 0);
389}
1// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
2/* Copyright (C) 2020 Facebook, Inc. */
3#include <stdlib.h>
4#include <errno.h>
5#include "testing_helpers.h"
6
7int parse_num_list(const char *s, bool **num_set, int *num_set_len)
8{
9 int i, set_len = 0, new_len, num, start = 0, end = -1;
10 bool *set = NULL, *tmp, parsing_end = false;
11 char *next;
12
13 while (s[0]) {
14 errno = 0;
15 num = strtol(s, &next, 10);
16 if (errno)
17 return -errno;
18
19 if (parsing_end)
20 end = num;
21 else
22 start = num;
23
24 if (!parsing_end && *next == '-') {
25 s = next + 1;
26 parsing_end = true;
27 continue;
28 } else if (*next == ',') {
29 parsing_end = false;
30 s = next + 1;
31 end = num;
32 } else if (*next == '\0') {
33 parsing_end = false;
34 s = next;
35 end = num;
36 } else {
37 return -EINVAL;
38 }
39
40 if (start > end)
41 return -EINVAL;
42
43 if (end + 1 > set_len) {
44 new_len = end + 1;
45 tmp = realloc(set, new_len);
46 if (!tmp) {
47 free(set);
48 return -ENOMEM;
49 }
50 for (i = set_len; i < start; i++)
51 tmp[i] = false;
52 set = tmp;
53 set_len = new_len;
54 }
55 for (i = start; i <= end; i++)
56 set[i] = true;
57 }
58
59 if (!set)
60 return -EINVAL;
61
62 *num_set = set;
63 *num_set_len = set_len;
64
65 return 0;
66}
67
68__u32 link_info_prog_id(const struct bpf_link *link, struct bpf_link_info *info)
69{
70 __u32 info_len = sizeof(*info);
71 int err;
72
73 memset(info, 0, sizeof(*info));
74 err = bpf_obj_get_info_by_fd(bpf_link__fd(link), info, &info_len);
75 if (err) {
76 printf("failed to get link info: %d\n", -errno);
77 return 0;
78 }
79 return info->prog_id;
80}