1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */ 3 4 #define _GNU_SOURCE 5 #include <linux/compiler.h> 6 #include <linux/ring_buffer.h> 7 #include <linux/build_bug.h> 8 #include <pthread.h> 9 #include <stdio.h> 10 #include <stdlib.h> 11 #include <sys/mman.h> 12 #include <sys/syscall.h> 13 #include <sys/sysinfo.h> 14 #include <test_progs.h> 15 #include <uapi/linux/bpf.h> 16 #include <unistd.h> 17 18 #include "user_ringbuf_fail.skel.h" 19 #include "user_ringbuf_success.skel.h" 20 21 #include "../progs/test_user_ringbuf.h" 22 23 static const long c_sample_size = sizeof(struct sample) + BPF_RINGBUF_HDR_SZ; 24 static long c_ringbuf_size, c_max_entries; 25 26 static void drain_current_samples(void) 27 { 28 syscall(__NR_getpgid); 29 } 30 31 static int write_samples(struct user_ring_buffer *ringbuf, uint32_t num_samples) 32 { 33 int i, err = 0; 34 35 /* Write some number of samples to the ring buffer. */ 36 for (i = 0; i < num_samples; i++) { 37 struct sample *entry; 38 int read; 39 40 entry = user_ring_buffer__reserve(ringbuf, sizeof(*entry)); 41 if (!entry) { 42 err = -errno; 43 goto done; 44 } 45 46 entry->pid = getpid(); 47 entry->seq = i; 48 entry->value = i * i; 49 50 read = snprintf(entry->comm, sizeof(entry->comm), "%u", i); 51 if (read <= 0) { 52 /* Assert on the error path to avoid spamming logs with 53 * mostly success messages. 54 */ 55 ASSERT_GT(read, 0, "snprintf_comm"); 56 err = read; 57 user_ring_buffer__discard(ringbuf, entry); 58 goto done; 59 } 60 61 user_ring_buffer__submit(ringbuf, entry); 62 } 63 64 done: 65 drain_current_samples(); 66 67 return err; 68 } 69 70 static struct user_ringbuf_success *open_load_ringbuf_skel(void) 71 { 72 struct user_ringbuf_success *skel; 73 int err; 74 75 skel = user_ringbuf_success__open(); 76 if (!ASSERT_OK_PTR(skel, "skel_open")) 77 return NULL; 78 79 err = bpf_map__set_max_entries(skel->maps.user_ringbuf, c_ringbuf_size); 80 if (!ASSERT_OK(err, "set_max_entries")) 81 goto cleanup; 82 83 err = bpf_map__set_max_entries(skel->maps.kernel_ringbuf, c_ringbuf_size); 84 if (!ASSERT_OK(err, "set_max_entries")) 85 goto cleanup; 86 87 err = user_ringbuf_success__load(skel); 88 if (!ASSERT_OK(err, "skel_load")) 89 goto cleanup; 90 91 return skel; 92 93 cleanup: 94 user_ringbuf_success__destroy(skel); 95 return NULL; 96 } 97 98 static void test_user_ringbuf_mappings(void) 99 { 100 int err, rb_fd; 101 int page_size = getpagesize(); 102 void *mmap_ptr; 103 struct user_ringbuf_success *skel; 104 105 skel = open_load_ringbuf_skel(); 106 if (!skel) 107 return; 108 109 rb_fd = bpf_map__fd(skel->maps.user_ringbuf); 110 /* cons_pos can be mapped R/O, can't add +X with mprotect. */ 111 mmap_ptr = mmap(NULL, page_size, PROT_READ, MAP_SHARED, rb_fd, 0); 112 ASSERT_OK_PTR(mmap_ptr, "ro_cons_pos"); 113 ASSERT_ERR(mprotect(mmap_ptr, page_size, PROT_WRITE), "write_cons_pos_protect"); 114 ASSERT_ERR(mprotect(mmap_ptr, page_size, PROT_EXEC), "exec_cons_pos_protect"); 115 ASSERT_ERR_PTR(mremap(mmap_ptr, 0, 4 * page_size, MREMAP_MAYMOVE), "wr_prod_pos"); 116 err = -errno; 117 ASSERT_ERR(err, "wr_prod_pos_err"); 118 ASSERT_OK(munmap(mmap_ptr, page_size), "unmap_ro_cons"); 119 120 /* prod_pos can be mapped RW, can't add +X with mprotect. */ 121 mmap_ptr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, MAP_SHARED, 122 rb_fd, page_size); 123 ASSERT_OK_PTR(mmap_ptr, "rw_prod_pos"); 124 ASSERT_ERR(mprotect(mmap_ptr, page_size, PROT_EXEC), "exec_prod_pos_protect"); 125 err = -errno; 126 ASSERT_ERR(err, "wr_prod_pos_err"); 127 ASSERT_OK(munmap(mmap_ptr, page_size), "unmap_rw_prod"); 128 129 /* data pages can be mapped RW, can't add +X with mprotect. */ 130 mmap_ptr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, rb_fd, 131 2 * page_size); 132 ASSERT_OK_PTR(mmap_ptr, "rw_data"); 133 ASSERT_ERR(mprotect(mmap_ptr, page_size, PROT_EXEC), "exec_data_protect"); 134 err = -errno; 135 ASSERT_ERR(err, "exec_data_err"); 136 ASSERT_OK(munmap(mmap_ptr, page_size), "unmap_rw_data"); 137 138 user_ringbuf_success__destroy(skel); 139 } 140 141 static int load_skel_create_ringbufs(struct user_ringbuf_success **skel_out, 142 struct ring_buffer **kern_ringbuf_out, 143 ring_buffer_sample_fn callback, 144 struct user_ring_buffer **user_ringbuf_out) 145 { 146 struct user_ringbuf_success *skel; 147 struct ring_buffer *kern_ringbuf = NULL; 148 struct user_ring_buffer *user_ringbuf = NULL; 149 int err = -ENOMEM, rb_fd; 150 151 skel = open_load_ringbuf_skel(); 152 if (!skel) 153 return err; 154 155 /* only trigger BPF program for current process */ 156 skel->bss->pid = getpid(); 157 158 if (kern_ringbuf_out) { 159 rb_fd = bpf_map__fd(skel->maps.kernel_ringbuf); 160 kern_ringbuf = ring_buffer__new(rb_fd, callback, skel, NULL); 161 if (!ASSERT_OK_PTR(kern_ringbuf, "kern_ringbuf_create")) 162 goto cleanup; 163 164 *kern_ringbuf_out = kern_ringbuf; 165 } 166 167 if (user_ringbuf_out) { 168 rb_fd = bpf_map__fd(skel->maps.user_ringbuf); 169 user_ringbuf = user_ring_buffer__new(rb_fd, NULL); 170 if (!ASSERT_OK_PTR(user_ringbuf, "user_ringbuf_create")) 171 goto cleanup; 172 173 *user_ringbuf_out = user_ringbuf; 174 ASSERT_EQ(skel->bss->read, 0, "no_reads_after_load"); 175 } 176 177 err = user_ringbuf_success__attach(skel); 178 if (!ASSERT_OK(err, "skel_attach")) 179 goto cleanup; 180 181 *skel_out = skel; 182 return 0; 183 184 cleanup: 185 if (kern_ringbuf_out) 186 *kern_ringbuf_out = NULL; 187 if (user_ringbuf_out) 188 *user_ringbuf_out = NULL; 189 ring_buffer__free(kern_ringbuf); 190 user_ring_buffer__free(user_ringbuf); 191 user_ringbuf_success__destroy(skel); 192 return err; 193 } 194 195 static int load_skel_create_user_ringbuf(struct user_ringbuf_success **skel_out, 196 struct user_ring_buffer **ringbuf_out) 197 { 198 return load_skel_create_ringbufs(skel_out, NULL, NULL, ringbuf_out); 199 } 200 201 static void manually_write_test_invalid_sample(struct user_ringbuf_success *skel, 202 __u32 size, __u64 producer_pos, int err) 203 { 204 void *data_ptr; 205 __u64 *producer_pos_ptr; 206 int rb_fd, page_size = getpagesize(); 207 208 rb_fd = bpf_map__fd(skel->maps.user_ringbuf); 209 210 ASSERT_EQ(skel->bss->read, 0, "num_samples_before_bad_sample"); 211 212 /* Map the producer_pos as RW. */ 213 producer_pos_ptr = mmap(NULL, page_size, PROT_READ | PROT_WRITE, 214 MAP_SHARED, rb_fd, page_size); 215 ASSERT_OK_PTR(producer_pos_ptr, "producer_pos_ptr"); 216 217 /* Map the data pages as RW. */ 218 data_ptr = mmap(NULL, page_size, PROT_WRITE, MAP_SHARED, rb_fd, 2 * page_size); 219 ASSERT_OK_PTR(data_ptr, "rw_data"); 220 221 memset(data_ptr, 0, BPF_RINGBUF_HDR_SZ); 222 *(__u32 *)data_ptr = size; 223 224 /* Synchronizes with smp_load_acquire() in __bpf_user_ringbuf_peek() in the kernel. */ 225 smp_store_release(producer_pos_ptr, producer_pos + BPF_RINGBUF_HDR_SZ); 226 227 drain_current_samples(); 228 ASSERT_EQ(skel->bss->read, 0, "num_samples_after_bad_sample"); 229 ASSERT_EQ(skel->bss->err, err, "err_after_bad_sample"); 230 231 ASSERT_OK(munmap(producer_pos_ptr, page_size), "unmap_producer_pos"); 232 ASSERT_OK(munmap(data_ptr, page_size), "unmap_data_ptr"); 233 } 234 235 static void test_user_ringbuf_post_misaligned(void) 236 { 237 struct user_ringbuf_success *skel; 238 struct user_ring_buffer *ringbuf; 239 int err; 240 __u32 size = (1 << 5) + 7; 241 242 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 243 if (!ASSERT_OK(err, "misaligned_skel")) 244 return; 245 246 manually_write_test_invalid_sample(skel, size, size, -EINVAL); 247 user_ring_buffer__free(ringbuf); 248 user_ringbuf_success__destroy(skel); 249 } 250 251 static void test_user_ringbuf_post_producer_wrong_offset(void) 252 { 253 struct user_ringbuf_success *skel; 254 struct user_ring_buffer *ringbuf; 255 int err; 256 __u32 size = (1 << 5); 257 258 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 259 if (!ASSERT_OK(err, "wrong_offset_skel")) 260 return; 261 262 manually_write_test_invalid_sample(skel, size, size - 8, -EINVAL); 263 user_ring_buffer__free(ringbuf); 264 user_ringbuf_success__destroy(skel); 265 } 266 267 static void test_user_ringbuf_post_larger_than_ringbuf_sz(void) 268 { 269 struct user_ringbuf_success *skel; 270 struct user_ring_buffer *ringbuf; 271 int err; 272 __u32 size = c_ringbuf_size; 273 274 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 275 if (!ASSERT_OK(err, "huge_sample_skel")) 276 return; 277 278 manually_write_test_invalid_sample(skel, size, size, -E2BIG); 279 user_ring_buffer__free(ringbuf); 280 user_ringbuf_success__destroy(skel); 281 } 282 283 static void test_user_ringbuf_basic(void) 284 { 285 struct user_ringbuf_success *skel; 286 struct user_ring_buffer *ringbuf; 287 int err; 288 289 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 290 if (!ASSERT_OK(err, "ringbuf_basic_skel")) 291 return; 292 293 ASSERT_EQ(skel->bss->read, 0, "num_samples_read_before"); 294 295 err = write_samples(ringbuf, 2); 296 if (!ASSERT_OK(err, "write_samples")) 297 goto cleanup; 298 299 ASSERT_EQ(skel->bss->read, 2, "num_samples_read_after"); 300 301 cleanup: 302 user_ring_buffer__free(ringbuf); 303 user_ringbuf_success__destroy(skel); 304 } 305 306 static void test_user_ringbuf_sample_full_ring_buffer(void) 307 { 308 struct user_ringbuf_success *skel; 309 struct user_ring_buffer *ringbuf; 310 int err; 311 void *sample; 312 313 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 314 if (!ASSERT_OK(err, "ringbuf_full_sample_skel")) 315 return; 316 317 sample = user_ring_buffer__reserve(ringbuf, c_ringbuf_size - BPF_RINGBUF_HDR_SZ); 318 if (!ASSERT_OK_PTR(sample, "full_sample")) 319 goto cleanup; 320 321 user_ring_buffer__submit(ringbuf, sample); 322 ASSERT_EQ(skel->bss->read, 0, "num_samples_read_before"); 323 drain_current_samples(); 324 ASSERT_EQ(skel->bss->read, 1, "num_samples_read_after"); 325 326 cleanup: 327 user_ring_buffer__free(ringbuf); 328 user_ringbuf_success__destroy(skel); 329 } 330 331 static void test_user_ringbuf_post_alignment_autoadjust(void) 332 { 333 struct user_ringbuf_success *skel; 334 struct user_ring_buffer *ringbuf; 335 struct sample *sample; 336 int err; 337 338 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 339 if (!ASSERT_OK(err, "ringbuf_align_autoadjust_skel")) 340 return; 341 342 /* libbpf should automatically round any sample up to an 8-byte alignment. */ 343 sample = user_ring_buffer__reserve(ringbuf, sizeof(*sample) + 1); 344 ASSERT_OK_PTR(sample, "reserve_autoaligned"); 345 user_ring_buffer__submit(ringbuf, sample); 346 347 ASSERT_EQ(skel->bss->read, 0, "num_samples_read_before"); 348 drain_current_samples(); 349 ASSERT_EQ(skel->bss->read, 1, "num_samples_read_after"); 350 351 user_ring_buffer__free(ringbuf); 352 user_ringbuf_success__destroy(skel); 353 } 354 355 static void test_user_ringbuf_overfill(void) 356 { 357 struct user_ringbuf_success *skel; 358 struct user_ring_buffer *ringbuf; 359 int err; 360 361 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 362 if (err) 363 return; 364 365 err = write_samples(ringbuf, c_max_entries * 5); 366 ASSERT_ERR(err, "write_samples"); 367 ASSERT_EQ(skel->bss->read, c_max_entries, "max_entries"); 368 369 user_ring_buffer__free(ringbuf); 370 user_ringbuf_success__destroy(skel); 371 } 372 373 static void test_user_ringbuf_discards_properly_ignored(void) 374 { 375 struct user_ringbuf_success *skel; 376 struct user_ring_buffer *ringbuf; 377 int err, num_discarded = 0; 378 __u64 *token; 379 380 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 381 if (err) 382 return; 383 384 ASSERT_EQ(skel->bss->read, 0, "num_samples_read_before"); 385 386 while (1) { 387 /* Write samples until the buffer is full. */ 388 token = user_ring_buffer__reserve(ringbuf, sizeof(*token)); 389 if (!token) 390 break; 391 392 user_ring_buffer__discard(ringbuf, token); 393 num_discarded++; 394 } 395 396 if (!ASSERT_GE(num_discarded, 0, "num_discarded")) 397 goto cleanup; 398 399 /* Should not read any samples, as they are all discarded. */ 400 ASSERT_EQ(skel->bss->read, 0, "num_pre_kick"); 401 drain_current_samples(); 402 ASSERT_EQ(skel->bss->read, 0, "num_post_kick"); 403 404 /* Now that the ring buffer has been drained, we should be able to 405 * reserve another token. 406 */ 407 token = user_ring_buffer__reserve(ringbuf, sizeof(*token)); 408 409 if (!ASSERT_OK_PTR(token, "new_token")) 410 goto cleanup; 411 412 user_ring_buffer__discard(ringbuf, token); 413 cleanup: 414 user_ring_buffer__free(ringbuf); 415 user_ringbuf_success__destroy(skel); 416 } 417 418 static void test_user_ringbuf_loop(void) 419 { 420 struct user_ringbuf_success *skel; 421 struct user_ring_buffer *ringbuf; 422 uint32_t total_samples = 8192; 423 uint32_t remaining_samples = total_samples; 424 int err; 425 426 if (!ASSERT_LT(c_max_entries, total_samples, "compare_c_max_entries")) 427 return; 428 429 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 430 if (err) 431 return; 432 433 do { 434 uint32_t curr_samples; 435 436 curr_samples = remaining_samples > c_max_entries 437 ? c_max_entries : remaining_samples; 438 err = write_samples(ringbuf, curr_samples); 439 if (err != 0) { 440 /* Assert inside of if statement to avoid flooding logs 441 * on the success path. 442 */ 443 ASSERT_OK(err, "write_samples"); 444 goto cleanup; 445 } 446 447 remaining_samples -= curr_samples; 448 ASSERT_EQ(skel->bss->read, total_samples - remaining_samples, 449 "current_batched_entries"); 450 } while (remaining_samples > 0); 451 ASSERT_EQ(skel->bss->read, total_samples, "total_batched_entries"); 452 453 cleanup: 454 user_ring_buffer__free(ringbuf); 455 user_ringbuf_success__destroy(skel); 456 } 457 458 static int send_test_message(struct user_ring_buffer *ringbuf, 459 enum test_msg_op op, s64 operand_64, 460 s32 operand_32) 461 { 462 struct test_msg *msg; 463 464 msg = user_ring_buffer__reserve(ringbuf, sizeof(*msg)); 465 if (!msg) { 466 /* Assert on the error path to avoid spamming logs with mostly 467 * success messages. 468 */ 469 ASSERT_OK_PTR(msg, "reserve_msg"); 470 return -ENOMEM; 471 } 472 473 msg->msg_op = op; 474 475 switch (op) { 476 case TEST_MSG_OP_INC64: 477 case TEST_MSG_OP_MUL64: 478 msg->operand_64 = operand_64; 479 break; 480 case TEST_MSG_OP_INC32: 481 case TEST_MSG_OP_MUL32: 482 msg->operand_32 = operand_32; 483 break; 484 default: 485 PRINT_FAIL("Invalid operand %d\n", op); 486 user_ring_buffer__discard(ringbuf, msg); 487 return -EINVAL; 488 } 489 490 user_ring_buffer__submit(ringbuf, msg); 491 492 return 0; 493 } 494 495 static void kick_kernel_read_messages(void) 496 { 497 syscall(__NR_prctl); 498 } 499 500 static int handle_kernel_msg(void *ctx, void *data, size_t len) 501 { 502 struct user_ringbuf_success *skel = ctx; 503 struct test_msg *msg = data; 504 505 switch (msg->msg_op) { 506 case TEST_MSG_OP_INC64: 507 skel->bss->user_mutated += msg->operand_64; 508 return 0; 509 case TEST_MSG_OP_INC32: 510 skel->bss->user_mutated += msg->operand_32; 511 return 0; 512 case TEST_MSG_OP_MUL64: 513 skel->bss->user_mutated *= msg->operand_64; 514 return 0; 515 case TEST_MSG_OP_MUL32: 516 skel->bss->user_mutated *= msg->operand_32; 517 return 0; 518 default: 519 fprintf(stderr, "Invalid operand %d\n", msg->msg_op); 520 return -EINVAL; 521 } 522 } 523 524 static void drain_kernel_messages_buffer(struct ring_buffer *kern_ringbuf, 525 struct user_ringbuf_success *skel) 526 { 527 int cnt; 528 529 cnt = ring_buffer__consume(kern_ringbuf); 530 ASSERT_EQ(cnt, 8, "consume_kern_ringbuf"); 531 ASSERT_OK(skel->bss->err, "consume_kern_ringbuf_err"); 532 } 533 534 static void test_user_ringbuf_msg_protocol(void) 535 { 536 struct user_ringbuf_success *skel; 537 struct user_ring_buffer *user_ringbuf; 538 struct ring_buffer *kern_ringbuf; 539 int err, i; 540 __u64 expected_kern = 0; 541 542 err = load_skel_create_ringbufs(&skel, &kern_ringbuf, handle_kernel_msg, &user_ringbuf); 543 if (!ASSERT_OK(err, "create_ringbufs")) 544 return; 545 546 for (i = 0; i < 64; i++) { 547 enum test_msg_op op = i % TEST_MSG_OP_NUM_OPS; 548 __u64 operand_64 = TEST_OP_64; 549 __u32 operand_32 = TEST_OP_32; 550 551 err = send_test_message(user_ringbuf, op, operand_64, operand_32); 552 if (err) { 553 /* Only assert on a failure to avoid spamming success logs. */ 554 ASSERT_OK(err, "send_test_message"); 555 goto cleanup; 556 } 557 558 switch (op) { 559 case TEST_MSG_OP_INC64: 560 expected_kern += operand_64; 561 break; 562 case TEST_MSG_OP_INC32: 563 expected_kern += operand_32; 564 break; 565 case TEST_MSG_OP_MUL64: 566 expected_kern *= operand_64; 567 break; 568 case TEST_MSG_OP_MUL32: 569 expected_kern *= operand_32; 570 break; 571 default: 572 PRINT_FAIL("Unexpected op %d\n", op); 573 goto cleanup; 574 } 575 576 if (i % 8 == 0) { 577 kick_kernel_read_messages(); 578 ASSERT_EQ(skel->bss->kern_mutated, expected_kern, "expected_kern"); 579 ASSERT_EQ(skel->bss->err, 0, "bpf_prog_err"); 580 drain_kernel_messages_buffer(kern_ringbuf, skel); 581 } 582 } 583 584 cleanup: 585 ring_buffer__free(kern_ringbuf); 586 user_ring_buffer__free(user_ringbuf); 587 user_ringbuf_success__destroy(skel); 588 } 589 590 static void *kick_kernel_cb(void *arg) 591 { 592 /* Kick the kernel, causing it to drain the ring buffer and then wake 593 * up the test thread waiting on epoll. 594 */ 595 syscall(__NR_prlimit64); 596 597 return NULL; 598 } 599 600 static int spawn_kick_thread_for_poll(void) 601 { 602 pthread_t thread; 603 604 return pthread_create(&thread, NULL, kick_kernel_cb, NULL); 605 } 606 607 static void test_user_ringbuf_blocking_reserve(void) 608 { 609 struct user_ringbuf_success *skel; 610 struct user_ring_buffer *ringbuf; 611 int err, num_written = 0; 612 __u64 *token; 613 614 err = load_skel_create_user_ringbuf(&skel, &ringbuf); 615 if (err) 616 return; 617 618 ASSERT_EQ(skel->bss->read, 0, "num_samples_read_before"); 619 620 while (1) { 621 /* Write samples until the buffer is full. */ 622 token = user_ring_buffer__reserve(ringbuf, sizeof(*token)); 623 if (!token) 624 break; 625 626 *token = 0xdeadbeef; 627 628 user_ring_buffer__submit(ringbuf, token); 629 num_written++; 630 } 631 632 if (!ASSERT_GE(num_written, 0, "num_written")) 633 goto cleanup; 634 635 /* Should not have read any samples until the kernel is kicked. */ 636 ASSERT_EQ(skel->bss->read, 0, "num_pre_kick"); 637 638 /* We correctly time out after 1 second, without a sample. */ 639 token = user_ring_buffer__reserve_blocking(ringbuf, sizeof(*token), 1000); 640 if (!ASSERT_EQ(token, NULL, "pre_kick_timeout_token")) 641 goto cleanup; 642 643 err = spawn_kick_thread_for_poll(); 644 if (!ASSERT_EQ(err, 0, "deferred_kick_thread\n")) 645 goto cleanup; 646 647 /* After spawning another thread that asynchronously kicks the kernel to 648 * drain the messages, we're able to block and successfully get a 649 * sample once we receive an event notification. 650 */ 651 token = user_ring_buffer__reserve_blocking(ringbuf, sizeof(*token), 10000); 652 653 if (!ASSERT_OK_PTR(token, "block_token")) 654 goto cleanup; 655 656 ASSERT_GT(skel->bss->read, 0, "num_post_kill"); 657 ASSERT_LE(skel->bss->read, num_written, "num_post_kill"); 658 ASSERT_EQ(skel->bss->err, 0, "err_post_poll"); 659 user_ring_buffer__discard(ringbuf, token); 660 661 cleanup: 662 user_ring_buffer__free(ringbuf); 663 user_ringbuf_success__destroy(skel); 664 } 665 666 #define SUCCESS_TEST(_func) { _func, #_func } 667 668 static struct { 669 void (*test_callback)(void); 670 const char *test_name; 671 } success_tests[] = { 672 SUCCESS_TEST(test_user_ringbuf_mappings), 673 SUCCESS_TEST(test_user_ringbuf_post_misaligned), 674 SUCCESS_TEST(test_user_ringbuf_post_producer_wrong_offset), 675 SUCCESS_TEST(test_user_ringbuf_post_larger_than_ringbuf_sz), 676 SUCCESS_TEST(test_user_ringbuf_basic), 677 SUCCESS_TEST(test_user_ringbuf_sample_full_ring_buffer), 678 SUCCESS_TEST(test_user_ringbuf_post_alignment_autoadjust), 679 SUCCESS_TEST(test_user_ringbuf_overfill), 680 SUCCESS_TEST(test_user_ringbuf_discards_properly_ignored), 681 SUCCESS_TEST(test_user_ringbuf_loop), 682 SUCCESS_TEST(test_user_ringbuf_msg_protocol), 683 SUCCESS_TEST(test_user_ringbuf_blocking_reserve), 684 }; 685 686 void test_user_ringbuf(void) 687 { 688 int i; 689 690 c_ringbuf_size = getpagesize(); /* 1 page */ 691 c_max_entries = c_ringbuf_size / c_sample_size; 692 693 for (i = 0; i < ARRAY_SIZE(success_tests); i++) { 694 if (!test__start_subtest(success_tests[i].test_name)) 695 continue; 696 697 success_tests[i].test_callback(); 698 } 699 700 RUN_TESTS(user_ringbuf_fail); 701 } 702