blob: d3c3c3a24150f99abd13ecb7d7b11d8f7351560d [file] [log] [blame]
Andrii Nakryikocd492912020-05-12 12:24:42 -07001// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
Andrii Nakryikof87c1932021-11-03 15:08:43 -07002/* Copyright (C) 2019 Netronome Systems, Inc. */
Andrii Nakryikocd492912020-05-12 12:24:42 -07003/* Copyright (C) 2020 Facebook, Inc. */
Stephen Veiss64276f02023-04-27 15:53:33 -07004#include <ctype.h>
Andrii Nakryikocd492912020-05-12 12:24:42 -07005#include <stdlib.h>
Andrii Nakryikof87c1932021-11-03 15:08:43 -07006#include <string.h>
Andrii Nakryikocd492912020-05-12 12:24:42 -07007#include <errno.h>
Andrii Nakryikof87c1932021-11-03 15:08:43 -07008#include <bpf/bpf.h>
9#include <bpf/libbpf.h>
Eduard Zingerman424ebaa2024-07-22 16:38:38 -070010#include "disasm.h"
Mykola Lysenko61ddff32022-04-08 17:17:49 -070011#include "test_progs.h"
Andrii Nakryikocd492912020-05-12 12:24:42 -070012#include "testing_helpers.h"
Jiri Olsa45db3102023-05-15 15:37:49 +020013#include <linux/membarrier.h>
Andrii Nakryikocd492912020-05-12 12:24:42 -070014
15int parse_num_list(const char *s, bool **num_set, int *num_set_len)
16{
17 int i, set_len = 0, new_len, num, start = 0, end = -1;
18 bool *set = NULL, *tmp, parsing_end = false;
19 char *next;
20
21 while (s[0]) {
22 errno = 0;
23 num = strtol(s, &next, 10);
24 if (errno)
25 return -errno;
26
27 if (parsing_end)
28 end = num;
29 else
30 start = num;
31
32 if (!parsing_end && *next == '-') {
33 s = next + 1;
34 parsing_end = true;
35 continue;
36 } else if (*next == ',') {
37 parsing_end = false;
38 s = next + 1;
39 end = num;
40 } else if (*next == '\0') {
41 parsing_end = false;
42 s = next;
43 end = num;
44 } else {
45 return -EINVAL;
46 }
47
48 if (start > end)
49 return -EINVAL;
50
51 if (end + 1 > set_len) {
52 new_len = end + 1;
53 tmp = realloc(set, new_len);
54 if (!tmp) {
55 free(set);
56 return -ENOMEM;
57 }
58 for (i = set_len; i < start; i++)
59 tmp[i] = false;
60 set = tmp;
61 set_len = new_len;
62 }
63 for (i = start; i <= end; i++)
64 set[i] = true;
65 }
66
Yuntao Wang958ddfd2022-04-06 08:36:22 +080067 if (!set || parsing_end)
Andrii Nakryikocd492912020-05-12 12:24:42 -070068 return -EINVAL;
69
70 *num_set = set;
71 *num_set_len = set_len;
72
73 return 0;
74}
Andrii Nakryiko90806cc2020-07-31 11:28:28 -070075
Stephen Veiss0a5c0de2023-04-27 15:53:32 -070076static int do_insert_test(struct test_filter_set *set,
77 char *test_str,
78 char *subtest_str)
79{
80 struct test_filter *tmp, *test;
81 char **ctmp;
82 int i;
83
84 for (i = 0; i < set->cnt; i++) {
85 test = &set->tests[i];
86
87 if (strcmp(test_str, test->name) == 0) {
88 free(test_str);
89 goto subtest;
90 }
91 }
92
93 tmp = realloc(set->tests, sizeof(*test) * (set->cnt + 1));
94 if (!tmp)
95 return -ENOMEM;
96
97 set->tests = tmp;
98 test = &set->tests[set->cnt];
99
100 test->name = test_str;
101 test->subtests = NULL;
102 test->subtest_cnt = 0;
103
104 set->cnt++;
105
106subtest:
107 if (!subtest_str)
108 return 0;
109
110 for (i = 0; i < test->subtest_cnt; i++) {
111 if (strcmp(subtest_str, test->subtests[i]) == 0) {
112 free(subtest_str);
113 return 0;
114 }
115 }
116
117 ctmp = realloc(test->subtests,
118 sizeof(*test->subtests) * (test->subtest_cnt + 1));
119 if (!ctmp)
120 return -ENOMEM;
121
122 test->subtests = ctmp;
123 test->subtests[test->subtest_cnt] = subtest_str;
124
125 test->subtest_cnt++;
126
127 return 0;
128}
129
130static int insert_test(struct test_filter_set *set,
131 char *test_spec,
132 bool is_glob_pattern)
133{
134 char *pattern, *subtest_str, *ext_test_str, *ext_subtest_str = NULL;
135 int glob_chars = 0;
136
137 if (is_glob_pattern) {
138 pattern = "%s";
139 } else {
140 pattern = "*%s*";
141 glob_chars = 2;
142 }
143
144 subtest_str = strchr(test_spec, '/');
145 if (subtest_str) {
146 *subtest_str = '\0';
147 subtest_str += 1;
148 }
149
150 ext_test_str = malloc(strlen(test_spec) + glob_chars + 1);
151 if (!ext_test_str)
152 goto err;
153
154 sprintf(ext_test_str, pattern, test_spec);
155
156 if (subtest_str) {
157 ext_subtest_str = malloc(strlen(subtest_str) + glob_chars + 1);
158 if (!ext_subtest_str)
159 goto err;
160
161 sprintf(ext_subtest_str, pattern, subtest_str);
162 }
163
164 return do_insert_test(set, ext_test_str, ext_subtest_str);
165
166err:
167 free(ext_test_str);
168 free(ext_subtest_str);
169
170 return -ENOMEM;
171}
172
Stephen Veiss64276f02023-04-27 15:53:33 -0700173int parse_test_list_file(const char *path,
174 struct test_filter_set *set,
175 bool is_glob_pattern)
176{
177 char *buf = NULL, *capture_start, *capture_end, *scan_end;
178 size_t buflen = 0;
179 int err = 0;
180 FILE *f;
181
182 f = fopen(path, "r");
183 if (!f) {
184 err = -errno;
185 fprintf(stderr, "Failed to open '%s': %d\n", path, err);
186 return err;
187 }
188
189 while (getline(&buf, &buflen, f) != -1) {
190 capture_start = buf;
191
192 while (isspace(*capture_start))
193 ++capture_start;
194
195 capture_end = capture_start;
196 scan_end = capture_start;
197
198 while (*scan_end && *scan_end != '#') {
199 if (!isspace(*scan_end))
200 capture_end = scan_end;
201
202 ++scan_end;
203 }
204
205 if (capture_end == capture_start)
206 continue;
207
208 *(++capture_end) = '\0';
209
210 err = insert_test(set, capture_start, is_glob_pattern);
211 if (err)
212 break;
213 }
214
215 fclose(f);
216 return err;
217}
218
Mykola Lysenko61ddff32022-04-08 17:17:49 -0700219int parse_test_list(const char *s,
220 struct test_filter_set *set,
221 bool is_glob_pattern)
222{
Stephen Veiss0a5c0de2023-04-27 15:53:32 -0700223 char *input, *state = NULL, *test_spec;
Tony Ambardar03bfcda2024-07-29 02:24:18 -0700224 int err = 0, cnt = 0;
Mykola Lysenko61ddff32022-04-08 17:17:49 -0700225
226 input = strdup(s);
227 if (!input)
228 return -ENOMEM;
229
Tony Ambardar03bfcda2024-07-29 02:24:18 -0700230 while ((test_spec = strtok_r(cnt++ ? NULL : input, ",", &state))) {
Stephen Veiss0a5c0de2023-04-27 15:53:32 -0700231 err = insert_test(set, test_spec, is_glob_pattern);
232 if (err)
233 break;
Mykola Lysenko61ddff32022-04-08 17:17:49 -0700234 }
235
Mykola Lysenko61ddff32022-04-08 17:17:49 -0700236 free(input);
Stephen Veiss0a5c0de2023-04-27 15:53:32 -0700237 return err;
Mykola Lysenko61ddff32022-04-08 17:17:49 -0700238}
239
Andrii Nakryiko90806cc2020-07-31 11:28:28 -0700240__u32 link_info_prog_id(const struct bpf_link *link, struct bpf_link_info *info)
241{
242 __u32 info_len = sizeof(*info);
243 int err;
244
245 memset(info, 0, sizeof(*info));
Ilya Leoshkevichc5a237a2023-02-15 00:12:18 +0100246 err = bpf_link_get_info_by_fd(bpf_link__fd(link), info, &info_len);
Andrii Nakryiko90806cc2020-07-31 11:28:28 -0700247 if (err) {
248 printf("failed to get link info: %d\n", -errno);
249 return 0;
250 }
251 return info->prog_id;
252}
Andrii Nakryikof87c1932021-11-03 15:08:43 -0700253
254int extra_prog_load_log_flags = 0;
255
Andrii Nakryiko56d3e442024-01-09 15:17:38 -0800256int testing_prog_flags(void)
257{
258 static int cached_flags = -1;
259 static int prog_flags[] = { BPF_F_TEST_RND_HI32, BPF_F_TEST_REG_INVARIANTS };
260 static struct bpf_insn insns[] = {
261 BPF_MOV64_IMM(BPF_REG_0, 0),
262 BPF_EXIT_INSN(),
263 };
264 int insn_cnt = ARRAY_SIZE(insns), i, fd, flags = 0;
265 LIBBPF_OPTS(bpf_prog_load_opts, opts);
266
267 if (cached_flags >= 0)
268 return cached_flags;
269
270 for (i = 0; i < ARRAY_SIZE(prog_flags); i++) {
271 opts.prog_flags = prog_flags[i];
272 fd = bpf_prog_load(BPF_PROG_TYPE_SOCKET_FILTER, "flag-test", "GPL",
273 insns, insn_cnt, &opts);
274 if (fd >= 0) {
275 flags |= prog_flags[i];
276 close(fd);
277 }
278 }
279
280 cached_flags = flags;
281 return cached_flags;
282}
283
Andrii Nakryikof87c1932021-11-03 15:08:43 -0700284int bpf_prog_test_load(const char *file, enum bpf_prog_type type,
285 struct bpf_object **pobj, int *prog_fd)
286{
Andrii Nakryiko3fc5fdc2021-12-09 11:38:39 -0800287 LIBBPF_OPTS(bpf_object_open_opts, opts,
288 .kernel_log_level = extra_prog_load_log_flags,
289 );
Andrii Nakryikof87c1932021-11-03 15:08:43 -0700290 struct bpf_object *obj;
291 struct bpf_program *prog;
Florent Revest8cccee92021-11-19 19:00:35 +0100292 __u32 flags;
Andrii Nakryikof87c1932021-11-03 15:08:43 -0700293 int err;
294
Andrii Nakryiko3fc5fdc2021-12-09 11:38:39 -0800295 obj = bpf_object__open_file(file, &opts);
Andrii Nakryikof87c1932021-11-03 15:08:43 -0700296 if (!obj)
297 return -errno;
298
299 prog = bpf_object__next_program(obj, NULL);
300 if (!prog) {
301 err = -ENOENT;
302 goto err_out;
303 }
304
Andrii Nakryikod6e62862023-03-27 11:52:00 -0700305 if (type != BPF_PROG_TYPE_UNSPEC && bpf_program__type(prog) != type)
Andrii Nakryikof87c1932021-11-03 15:08:43 -0700306 bpf_program__set_type(prog, type);
307
Andrii Nakryiko56d3e442024-01-09 15:17:38 -0800308 flags = bpf_program__flags(prog) | testing_prog_flags();
Florent Revest8cccee92021-11-19 19:00:35 +0100309 bpf_program__set_flags(prog, flags);
Andrii Nakryiko50dee702021-11-10 21:17:58 -0800310
Andrii Nakryiko3fc5fdc2021-12-09 11:38:39 -0800311 err = bpf_object__load(obj);
Andrii Nakryikof87c1932021-11-03 15:08:43 -0700312 if (err)
313 goto err_out;
314
315 *pobj = obj;
316 *prog_fd = bpf_program__fd(prog);
317
318 return 0;
319err_out:
320 bpf_object__close(obj);
321 return err;
322}
323
324int bpf_test_load_program(enum bpf_prog_type type, const struct bpf_insn *insns,
325 size_t insns_cnt, const char *license,
326 __u32 kern_version, char *log_buf,
327 size_t log_buf_sz)
328{
329 LIBBPF_OPTS(bpf_prog_load_opts, opts,
330 .kern_version = kern_version,
Andrii Nakryiko56d3e442024-01-09 15:17:38 -0800331 .prog_flags = testing_prog_flags(),
Andrii Nakryikof87c1932021-11-03 15:08:43 -0700332 .log_level = extra_prog_load_log_flags,
333 .log_buf = log_buf,
334 .log_size = log_buf_sz,
335 );
336
337 return bpf_prog_load(type, NULL, license, insns, insns_cnt, &opts);
338}
Song Liude6d0142023-04-12 14:04:21 -0700339
340__u64 read_perf_max_sample_freq(void)
341{
342 __u64 sample_freq = 5000; /* fallback to 5000 on error */
343 FILE *f;
344
345 f = fopen("/proc/sys/kernel/perf_event_max_sample_rate", "r");
346 if (f == NULL) {
347 printf("Failed to open /proc/sys/kernel/perf_event_max_sample_rate: err %d\n"
348 "return default value: 5000\n", -errno);
349 return sample_freq;
350 }
351 if (fscanf(f, "%llu", &sample_freq) != 1) {
352 printf("Failed to parse /proc/sys/kernel/perf_event_max_sample_rate: err %d\n"
353 "return default value: 5000\n", -errno);
354 }
355
356 fclose(f);
357 return sample_freq;
358}
Jiri Olsa45db3102023-05-15 15:37:49 +0200359
Kui-Feng Leee9bbda12024-02-21 18:11:05 -0800360int finit_module(int fd, const char *param_values, int flags)
Jiri Olsa45db3102023-05-15 15:37:49 +0200361{
362 return syscall(__NR_finit_module, fd, param_values, flags);
363}
364
Kui-Feng Leee9bbda12024-02-21 18:11:05 -0800365int delete_module(const char *name, int flags)
Jiri Olsa45db3102023-05-15 15:37:49 +0200366{
367 return syscall(__NR_delete_module, name, flags);
368}
369
Jiri Olsa11642eb92023-05-15 15:37:52 +0200370int unload_bpf_testmod(bool verbose)
Jiri Olsa45db3102023-05-15 15:37:49 +0200371{
Alexei Starovoitov82e38a52024-04-24 13:57:18 -0700372 int ret, cnt = 0;
373
Jiri Olsa45db3102023-05-15 15:37:49 +0200374 if (kern_sync_rcu())
Jiri Olsad18decc2023-05-15 15:37:50 +0200375 fprintf(stdout, "Failed to trigger kernel-side RCU sync!\n");
Alexei Starovoitov82e38a52024-04-24 13:57:18 -0700376
377 for (;;) {
378 ret = delete_module("bpf_testmod", 0);
379 if (!ret || errno != EAGAIN)
380 break;
381 if (++cnt > 10000) {
382 fprintf(stdout, "Unload of bpf_testmod timed out\n");
383 break;
384 }
385 usleep(100);
386 }
387
388 if (ret) {
Jiri Olsa45db3102023-05-15 15:37:49 +0200389 if (errno == ENOENT) {
390 if (verbose)
391 fprintf(stdout, "bpf_testmod.ko is already unloaded.\n");
Jiri Olsa11642eb92023-05-15 15:37:52 +0200392 return -1;
Jiri Olsa45db3102023-05-15 15:37:49 +0200393 }
Jiri Olsad18decc2023-05-15 15:37:50 +0200394 fprintf(stdout, "Failed to unload bpf_testmod.ko from kernel: %d\n", -errno);
Jiri Olsa11642eb92023-05-15 15:37:52 +0200395 return -1;
Jiri Olsa45db3102023-05-15 15:37:49 +0200396 }
397 if (verbose)
398 fprintf(stdout, "Successfully unloaded bpf_testmod.ko.\n");
Jiri Olsa11642eb92023-05-15 15:37:52 +0200399 return 0;
Jiri Olsa45db3102023-05-15 15:37:49 +0200400}
401
402int load_bpf_testmod(bool verbose)
403{
404 int fd;
405
Jiri Olsa45db3102023-05-15 15:37:49 +0200406 if (verbose)
407 fprintf(stdout, "Loading bpf_testmod.ko...\n");
408
409 fd = open("bpf_testmod.ko", O_RDONLY);
410 if (fd < 0) {
Jiri Olsad18decc2023-05-15 15:37:50 +0200411 fprintf(stdout, "Can't find bpf_testmod.ko kernel module: %d\n", -errno);
Jiri Olsa45db3102023-05-15 15:37:49 +0200412 return -ENOENT;
413 }
414 if (finit_module(fd, "", 0)) {
Jiri Olsad18decc2023-05-15 15:37:50 +0200415 fprintf(stdout, "Failed to load bpf_testmod.ko into the kernel: %d\n", -errno);
Jiri Olsa45db3102023-05-15 15:37:49 +0200416 close(fd);
417 return -EINVAL;
418 }
419 close(fd);
420
421 if (verbose)
422 fprintf(stdout, "Successfully loaded bpf_testmod.ko.\n");
423 return 0;
424}
425
426/*
427 * Trigger synchronize_rcu() in kernel.
428 */
429int kern_sync_rcu(void)
430{
431 return syscall(__NR_membarrier, MEMBARRIER_CMD_SHARED, 0, 0);
432}
Hou Taob4b7a402024-01-05 18:48:18 +0800433
434int get_xlated_program(int fd_prog, struct bpf_insn **buf, __u32 *cnt)
435{
436 __u32 buf_element_size = sizeof(struct bpf_insn);
437 struct bpf_prog_info info = {};
438 __u32 info_len = sizeof(info);
439 __u32 xlated_prog_len;
440
441 if (bpf_prog_get_info_by_fd(fd_prog, &info, &info_len)) {
442 perror("bpf_prog_get_info_by_fd failed");
443 return -1;
444 }
445
446 xlated_prog_len = info.xlated_prog_len;
447 if (xlated_prog_len % buf_element_size) {
448 printf("Program length %u is not multiple of %u\n",
449 xlated_prog_len, buf_element_size);
450 return -1;
451 }
452
453 *cnt = xlated_prog_len / buf_element_size;
454 *buf = calloc(*cnt, buf_element_size);
Hao Gec2644872024-08-20 10:36:22 +0800455 if (!*buf) {
Hou Taob4b7a402024-01-05 18:48:18 +0800456 perror("can't allocate xlated program buffer");
457 return -ENOMEM;
458 }
459
460 bzero(&info, sizeof(info));
461 info.xlated_prog_len = xlated_prog_len;
462 info.xlated_prog_insns = (__u64)(unsigned long)*buf;
463 if (bpf_prog_get_info_by_fd(fd_prog, &info, &info_len)) {
464 perror("second bpf_prog_get_info_by_fd failed");
465 goto out_free_buf;
466 }
467
468 return 0;
469
470out_free_buf:
471 free(*buf);
472 *buf = NULL;
473 return -1;
474}
Tiezhu Yang15b4f882024-01-23 17:03:50 +0800475
476bool is_jit_enabled(void)
477{
478 const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable";
479 bool enabled = false;
480 int sysctl_fd;
481
482 sysctl_fd = open(jit_sysctl, O_RDONLY);
483 if (sysctl_fd != -1) {
484 char tmpc;
485
486 if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1)
487 enabled = (tmpc != '0');
488 close(sysctl_fd);
489 }
490
491 return enabled;
492}