1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2022 Red Hat */ 3 #include "hid.skel.h" 4 5 #include "../kselftest_harness.h" 6 7 #include <bpf/bpf.h> 8 #include <fcntl.h> 9 #include <fnmatch.h> 10 #include <dirent.h> 11 #include <poll.h> 12 #include <pthread.h> 13 #include <stdbool.h> 14 #include <linux/hidraw.h> 15 #include <linux/uhid.h> 16 17 #define SHOW_UHID_DEBUG 0 18 19 #define min(a, b) \ 20 ({ __typeof__(a) _a = (a); \ 21 __typeof__(b) _b = (b); \ 22 _a < _b ? _a : _b; }) 23 24 static unsigned char rdesc[] = { 25 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 26 0x09, 0x21, /* Usage (Vendor Usage 0x21) */ 27 0xa1, 0x01, /* COLLECTION (Application) */ 28 0x09, 0x01, /* Usage (Vendor Usage 0x01) */ 29 0xa1, 0x00, /* COLLECTION (Physical) */ 30 0x85, 0x02, /* REPORT_ID (2) */ 31 0x19, 0x01, /* USAGE_MINIMUM (1) */ 32 0x29, 0x08, /* USAGE_MAXIMUM (3) */ 33 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 34 0x25, 0xff, /* LOGICAL_MAXIMUM (255) */ 35 0x95, 0x08, /* REPORT_COUNT (8) */ 36 0x75, 0x08, /* REPORT_SIZE (8) */ 37 0x81, 0x02, /* INPUT (Data,Var,Abs) */ 38 0xc0, /* END_COLLECTION */ 39 0x09, 0x01, /* Usage (Vendor Usage 0x01) */ 40 0xa1, 0x00, /* COLLECTION (Physical) */ 41 0x85, 0x01, /* REPORT_ID (1) */ 42 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 43 0x19, 0x01, /* USAGE_MINIMUM (1) */ 44 0x29, 0x03, /* USAGE_MAXIMUM (3) */ 45 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 46 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 47 0x95, 0x03, /* REPORT_COUNT (3) */ 48 0x75, 0x01, /* REPORT_SIZE (1) */ 49 0x81, 0x02, /* INPUT (Data,Var,Abs) */ 50 0x95, 0x01, /* REPORT_COUNT (1) */ 51 0x75, 0x05, /* REPORT_SIZE (5) */ 52 0x81, 0x01, /* INPUT (Cnst,Var,Abs) */ 53 0x05, 0x01, /* USAGE_PAGE (Generic Desktop) */ 54 0x09, 0x30, /* USAGE (X) */ 55 0x09, 0x31, /* USAGE (Y) */ 56 0x15, 0x81, /* LOGICAL_MINIMUM (-127) */ 57 0x25, 0x7f, /* LOGICAL_MAXIMUM (127) */ 58 0x75, 0x10, /* REPORT_SIZE (16) */ 59 0x95, 0x02, /* REPORT_COUNT (2) */ 60 0x81, 0x06, /* INPUT (Data,Var,Rel) */ 61 62 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 63 0x19, 0x01, /* USAGE_MINIMUM (1) */ 64 0x29, 0x03, /* USAGE_MAXIMUM (3) */ 65 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 66 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 67 0x95, 0x03, /* REPORT_COUNT (3) */ 68 0x75, 0x01, /* REPORT_SIZE (1) */ 69 0x91, 0x02, /* Output (Data,Var,Abs) */ 70 0x95, 0x01, /* REPORT_COUNT (1) */ 71 0x75, 0x05, /* REPORT_SIZE (5) */ 72 0x91, 0x01, /* Output (Cnst,Var,Abs) */ 73 74 0x06, 0x00, 0xff, /* Usage Page (Vendor Defined Page 1) */ 75 0x19, 0x06, /* USAGE_MINIMUM (6) */ 76 0x29, 0x08, /* USAGE_MAXIMUM (8) */ 77 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ 78 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ 79 0x95, 0x03, /* REPORT_COUNT (3) */ 80 0x75, 0x01, /* REPORT_SIZE (1) */ 81 0xb1, 0x02, /* Feature (Data,Var,Abs) */ 82 0x95, 0x01, /* REPORT_COUNT (1) */ 83 0x75, 0x05, /* REPORT_SIZE (5) */ 84 0x91, 0x01, /* Output (Cnst,Var,Abs) */ 85 86 0xc0, /* END_COLLECTION */ 87 0xc0, /* END_COLLECTION */ 88 }; 89 90 static __u8 feature_data[] = { 1, 2 }; 91 92 struct attach_prog_args { 93 int prog_fd; 94 unsigned int hid; 95 int retval; 96 int insert_head; 97 }; 98 99 struct hid_hw_request_syscall_args { 100 __u8 data[10]; 101 unsigned int hid; 102 int retval; 103 size_t size; 104 enum hid_report_type type; 105 __u8 request_type; 106 }; 107 108 #define ASSERT_OK(data) ASSERT_FALSE(data) 109 #define ASSERT_OK_PTR(ptr) ASSERT_NE(NULL, ptr) 110 111 #define UHID_LOG(fmt, ...) do { \ 112 if (SHOW_UHID_DEBUG) \ 113 TH_LOG(fmt, ##__VA_ARGS__); \ 114 } while (0) 115 116 static pthread_mutex_t uhid_started_mtx = PTHREAD_MUTEX_INITIALIZER; 117 static pthread_cond_t uhid_started = PTHREAD_COND_INITIALIZER; 118 119 static pthread_mutex_t uhid_output_mtx = PTHREAD_MUTEX_INITIALIZER; 120 static pthread_cond_t uhid_output_cond = PTHREAD_COND_INITIALIZER; 121 static unsigned char output_report[10]; 122 123 /* no need to protect uhid_stopped, only one thread accesses it */ 124 static bool uhid_stopped; 125 126 static int uhid_write(struct __test_metadata *_metadata, int fd, const struct uhid_event *ev) 127 { 128 ssize_t ret; 129 130 ret = write(fd, ev, sizeof(*ev)); 131 if (ret < 0) { 132 TH_LOG("Cannot write to uhid: %m"); 133 return -errno; 134 } else if (ret != sizeof(*ev)) { 135 TH_LOG("Wrong size written to uhid: %zd != %zu", 136 ret, sizeof(ev)); 137 return -EFAULT; 138 } else { 139 return 0; 140 } 141 } 142 143 static int uhid_create(struct __test_metadata *_metadata, int fd, int rand_nb) 144 { 145 struct uhid_event ev; 146 char buf[25]; 147 148 sprintf(buf, "test-uhid-device-%d", rand_nb); 149 150 memset(&ev, 0, sizeof(ev)); 151 ev.type = UHID_CREATE; 152 strcpy((char *)ev.u.create.name, buf); 153 ev.u.create.rd_data = rdesc; 154 ev.u.create.rd_size = sizeof(rdesc); 155 ev.u.create.bus = BUS_USB; 156 ev.u.create.vendor = 0x0001; 157 ev.u.create.product = 0x0a37; 158 ev.u.create.version = 0; 159 ev.u.create.country = 0; 160 161 sprintf(buf, "%d", rand_nb); 162 strcpy((char *)ev.u.create.phys, buf); 163 164 return uhid_write(_metadata, fd, &ev); 165 } 166 167 static void uhid_destroy(struct __test_metadata *_metadata, int fd) 168 { 169 struct uhid_event ev; 170 171 memset(&ev, 0, sizeof(ev)); 172 ev.type = UHID_DESTROY; 173 174 uhid_write(_metadata, fd, &ev); 175 } 176 177 static int uhid_event(struct __test_metadata *_metadata, int fd) 178 { 179 struct uhid_event ev, answer; 180 ssize_t ret; 181 182 memset(&ev, 0, sizeof(ev)); 183 ret = read(fd, &ev, sizeof(ev)); 184 if (ret == 0) { 185 UHID_LOG("Read HUP on uhid-cdev"); 186 return -EFAULT; 187 } else if (ret < 0) { 188 UHID_LOG("Cannot read uhid-cdev: %m"); 189 return -errno; 190 } else if (ret != sizeof(ev)) { 191 UHID_LOG("Invalid size read from uhid-dev: %zd != %zu", 192 ret, sizeof(ev)); 193 return -EFAULT; 194 } 195 196 switch (ev.type) { 197 case UHID_START: 198 pthread_mutex_lock(&uhid_started_mtx); 199 pthread_cond_signal(&uhid_started); 200 pthread_mutex_unlock(&uhid_started_mtx); 201 202 UHID_LOG("UHID_START from uhid-dev"); 203 break; 204 case UHID_STOP: 205 uhid_stopped = true; 206 207 UHID_LOG("UHID_STOP from uhid-dev"); 208 break; 209 case UHID_OPEN: 210 UHID_LOG("UHID_OPEN from uhid-dev"); 211 break; 212 case UHID_CLOSE: 213 UHID_LOG("UHID_CLOSE from uhid-dev"); 214 break; 215 case UHID_OUTPUT: 216 UHID_LOG("UHID_OUTPUT from uhid-dev"); 217 218 pthread_mutex_lock(&uhid_output_mtx); 219 memcpy(output_report, 220 ev.u.output.data, 221 min(ev.u.output.size, sizeof(output_report))); 222 pthread_cond_signal(&uhid_output_cond); 223 pthread_mutex_unlock(&uhid_output_mtx); 224 break; 225 case UHID_GET_REPORT: 226 UHID_LOG("UHID_GET_REPORT from uhid-dev"); 227 228 answer.type = UHID_GET_REPORT_REPLY; 229 answer.u.get_report_reply.id = ev.u.get_report.id; 230 answer.u.get_report_reply.err = ev.u.get_report.rnum == 1 ? 0 : -EIO; 231 answer.u.get_report_reply.size = sizeof(feature_data); 232 memcpy(answer.u.get_report_reply.data, feature_data, sizeof(feature_data)); 233 234 uhid_write(_metadata, fd, &answer); 235 236 break; 237 case UHID_SET_REPORT: 238 UHID_LOG("UHID_SET_REPORT from uhid-dev"); 239 break; 240 default: 241 TH_LOG("Invalid event from uhid-dev: %u", ev.type); 242 } 243 244 return 0; 245 } 246 247 struct uhid_thread_args { 248 int fd; 249 struct __test_metadata *_metadata; 250 }; 251 static void *uhid_read_events_thread(void *arg) 252 { 253 struct uhid_thread_args *args = (struct uhid_thread_args *)arg; 254 struct __test_metadata *_metadata = args->_metadata; 255 struct pollfd pfds[1]; 256 int fd = args->fd; 257 int ret = 0; 258 259 pfds[0].fd = fd; 260 pfds[0].events = POLLIN; 261 262 uhid_stopped = false; 263 264 while (!uhid_stopped) { 265 ret = poll(pfds, 1, 100); 266 if (ret < 0) { 267 TH_LOG("Cannot poll for fds: %m"); 268 break; 269 } 270 if (pfds[0].revents & POLLIN) { 271 ret = uhid_event(_metadata, fd); 272 if (ret) 273 break; 274 } 275 } 276 277 return (void *)(long)ret; 278 } 279 280 static int uhid_start_listener(struct __test_metadata *_metadata, pthread_t *tid, int uhid_fd) 281 { 282 struct uhid_thread_args args = { 283 .fd = uhid_fd, 284 ._metadata = _metadata, 285 }; 286 int err; 287 288 pthread_mutex_lock(&uhid_started_mtx); 289 err = pthread_create(tid, NULL, uhid_read_events_thread, (void *)&args); 290 ASSERT_EQ(0, err) { 291 TH_LOG("Could not start the uhid thread: %d", err); 292 pthread_mutex_unlock(&uhid_started_mtx); 293 close(uhid_fd); 294 return -EIO; 295 } 296 pthread_cond_wait(&uhid_started, &uhid_started_mtx); 297 pthread_mutex_unlock(&uhid_started_mtx); 298 299 return 0; 300 } 301 302 static int uhid_send_event(struct __test_metadata *_metadata, int fd, __u8 *buf, size_t size) 303 { 304 struct uhid_event ev; 305 306 if (size > sizeof(ev.u.input.data)) 307 return -E2BIG; 308 309 memset(&ev, 0, sizeof(ev)); 310 ev.type = UHID_INPUT2; 311 ev.u.input2.size = size; 312 313 memcpy(ev.u.input2.data, buf, size); 314 315 return uhid_write(_metadata, fd, &ev); 316 } 317 318 static int setup_uhid(struct __test_metadata *_metadata, int rand_nb) 319 { 320 int fd; 321 const char *path = "/dev/uhid"; 322 int ret; 323 324 fd = open(path, O_RDWR | O_CLOEXEC); 325 ASSERT_GE(fd, 0) TH_LOG("open uhid-cdev failed; %d", fd); 326 327 ret = uhid_create(_metadata, fd, rand_nb); 328 ASSERT_EQ(0, ret) { 329 TH_LOG("create uhid device failed: %d", ret); 330 close(fd); 331 } 332 333 return fd; 334 } 335 336 static bool match_sysfs_device(int dev_id, const char *workdir, struct dirent *dir) 337 { 338 const char *target = "0003:0001:0A37.*"; 339 char phys[512]; 340 char uevent[1024]; 341 char temp[512]; 342 int fd, nread; 343 bool found = false; 344 345 if (fnmatch(target, dir->d_name, 0)) 346 return false; 347 348 /* we found the correct VID/PID, now check for phys */ 349 sprintf(uevent, "%s/%s/uevent", workdir, dir->d_name); 350 351 fd = open(uevent, O_RDONLY | O_NONBLOCK); 352 if (fd < 0) 353 return false; 354 355 sprintf(phys, "PHYS=%d", dev_id); 356 357 nread = read(fd, temp, ARRAY_SIZE(temp)); 358 if (nread > 0 && (strstr(temp, phys)) != NULL) 359 found = true; 360 361 close(fd); 362 363 return found; 364 } 365 366 static int get_hid_id(int dev_id) 367 { 368 const char *workdir = "/sys/devices/virtual/misc/uhid"; 369 const char *str_id; 370 DIR *d; 371 struct dirent *dir; 372 int found = -1, attempts = 3; 373 374 /* it would be nice to be able to use nftw, but the no_alu32 target doesn't support it */ 375 376 while (found < 0 && attempts > 0) { 377 attempts--; 378 d = opendir(workdir); 379 if (d) { 380 while ((dir = readdir(d)) != NULL) { 381 if (!match_sysfs_device(dev_id, workdir, dir)) 382 continue; 383 384 str_id = dir->d_name + sizeof("0003:0001:0A37."); 385 found = (int)strtol(str_id, NULL, 16); 386 387 break; 388 } 389 closedir(d); 390 } 391 if (found < 0) 392 usleep(100000); 393 } 394 395 return found; 396 } 397 398 static int get_hidraw(int dev_id) 399 { 400 const char *workdir = "/sys/devices/virtual/misc/uhid"; 401 char sysfs[1024]; 402 DIR *d, *subd; 403 struct dirent *dir, *subdir; 404 int i, found = -1; 405 406 /* retry 5 times in case the system is loaded */ 407 for (i = 5; i > 0; i--) { 408 usleep(10); 409 d = opendir(workdir); 410 411 if (!d) 412 continue; 413 414 while ((dir = readdir(d)) != NULL) { 415 if (!match_sysfs_device(dev_id, workdir, dir)) 416 continue; 417 418 sprintf(sysfs, "%s/%s/hidraw", workdir, dir->d_name); 419 420 subd = opendir(sysfs); 421 if (!subd) 422 continue; 423 424 while ((subdir = readdir(subd)) != NULL) { 425 if (fnmatch("hidraw*", subdir->d_name, 0)) 426 continue; 427 428 found = atoi(subdir->d_name + strlen("hidraw")); 429 } 430 431 closedir(subd); 432 433 if (found > 0) 434 break; 435 } 436 closedir(d); 437 } 438 439 return found; 440 } 441 442 static int open_hidraw(int dev_id) 443 { 444 int hidraw_number; 445 char hidraw_path[64] = { 0 }; 446 447 hidraw_number = get_hidraw(dev_id); 448 if (hidraw_number < 0) 449 return hidraw_number; 450 451 /* open hidraw node to check the other side of the pipe */ 452 sprintf(hidraw_path, "/dev/hidraw%d", hidraw_number); 453 return open(hidraw_path, O_RDWR | O_NONBLOCK); 454 } 455 456 FIXTURE(hid_bpf) { 457 int dev_id; 458 int uhid_fd; 459 int hidraw_fd; 460 int hid_id; 461 pthread_t tid; 462 struct hid *skel; 463 struct bpf_link *hid_links[3]; /* max number of programs loaded in a single test */ 464 }; 465 static void detach_bpf(FIXTURE_DATA(hid_bpf) * self) 466 { 467 int i; 468 469 if (self->hidraw_fd) 470 close(self->hidraw_fd); 471 self->hidraw_fd = 0; 472 473 if (!self->skel) 474 return; 475 476 hid__detach(self->skel); 477 478 for (i = 0; i < ARRAY_SIZE(self->hid_links); i++) { 479 if (self->hid_links[i]) 480 bpf_link__destroy(self->hid_links[i]); 481 } 482 483 hid__destroy(self->skel); 484 self->skel = NULL; 485 } 486 487 FIXTURE_TEARDOWN(hid_bpf) { 488 void *uhid_err; 489 490 uhid_destroy(_metadata, self->uhid_fd); 491 492 detach_bpf(self); 493 pthread_join(self->tid, &uhid_err); 494 } 495 #define TEARDOWN_LOG(fmt, ...) do { \ 496 TH_LOG(fmt, ##__VA_ARGS__); \ 497 hid_bpf_teardown(_metadata, self, variant); \ 498 } while (0) 499 500 FIXTURE_SETUP(hid_bpf) 501 { 502 time_t t; 503 int err; 504 505 /* initialize random number generator */ 506 srand((unsigned int)time(&t)); 507 508 self->dev_id = rand() % 1024; 509 510 self->uhid_fd = setup_uhid(_metadata, self->dev_id); 511 512 /* locate the uev, self, variant);ent file of the created device */ 513 self->hid_id = get_hid_id(self->dev_id); 514 ASSERT_GT(self->hid_id, 0) 515 TEARDOWN_LOG("Could not locate uhid device id: %d", self->hid_id); 516 517 err = uhid_start_listener(_metadata, &self->tid, self->uhid_fd); 518 ASSERT_EQ(0, err) TEARDOWN_LOG("could not start udev listener: %d", err); 519 } 520 521 struct test_program { 522 const char *name; 523 int insert_head; 524 }; 525 #define LOAD_PROGRAMS(progs) \ 526 load_programs(progs, ARRAY_SIZE(progs), _metadata, self, variant) 527 #define LOAD_BPF \ 528 load_programs(NULL, 0, _metadata, self, variant) 529 static void load_programs(const struct test_program programs[], 530 const size_t progs_count, 531 struct __test_metadata *_metadata, 532 FIXTURE_DATA(hid_bpf) * self, 533 const FIXTURE_VARIANT(hid_bpf) * variant) 534 { 535 int err = -EINVAL; 536 537 ASSERT_LE(progs_count, ARRAY_SIZE(self->hid_links)) 538 TH_LOG("too many programs are to be loaded"); 539 540 /* open the bpf file */ 541 self->skel = hid__open(); 542 ASSERT_OK_PTR(self->skel) TEARDOWN_LOG("Error while calling hid__open"); 543 544 for (int i = 0; i < progs_count; i++) { 545 struct bpf_program *prog; 546 struct bpf_map *map; 547 int *ops_hid_id; 548 549 prog = bpf_object__find_program_by_name(*self->skel->skeleton->obj, 550 programs[i].name); 551 ASSERT_OK_PTR(prog) TH_LOG("can not find program by name '%s'", programs[i].name); 552 553 bpf_program__set_autoload(prog, true); 554 555 map = bpf_object__find_map_by_name(*self->skel->skeleton->obj, 556 programs[i].name + 4); 557 ASSERT_OK_PTR(map) TH_LOG("can not find struct_ops by name '%s'", 558 programs[i].name + 4); 559 560 /* hid_id is the first field of struct hid_bpf_ops */ 561 ops_hid_id = bpf_map__initial_value(map, NULL); 562 ASSERT_OK_PTR(ops_hid_id) TH_LOG("unable to retrieve struct_ops data"); 563 564 *ops_hid_id = self->hid_id; 565 } 566 567 err = hid__load(self->skel); 568 ASSERT_OK(err) TH_LOG("hid_skel_load failed: %d", err); 569 570 for (int i = 0; i < progs_count; i++) { 571 struct bpf_map *map; 572 573 map = bpf_object__find_map_by_name(*self->skel->skeleton->obj, 574 programs[i].name + 4); 575 ASSERT_OK_PTR(map) TH_LOG("can not find struct_ops by name '%s'", 576 programs[i].name + 4); 577 578 self->hid_links[i] = bpf_map__attach_struct_ops(map); 579 ASSERT_OK_PTR(self->hid_links[i]) TH_LOG("failed to attach struct ops '%s'", 580 programs[i].name + 4); 581 } 582 583 hid__attach(self->skel); 584 585 self->hidraw_fd = open_hidraw(self->dev_id); 586 ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); 587 } 588 589 /* 590 * A simple test to see if the fixture is working fine. 591 * If this fails, none of the other tests will pass. 592 */ 593 TEST_F(hid_bpf, test_create_uhid) 594 { 595 } 596 597 /* 598 * Attach hid_first_event to the given uhid device, 599 * retrieve and open the matching hidraw node, 600 * inject one event in the uhid device, 601 * check that the program sees it and can change the data 602 */ 603 TEST_F(hid_bpf, raw_event) 604 { 605 const struct test_program progs[] = { 606 { .name = "hid_first_event" }, 607 }; 608 __u8 buf[10] = {0}; 609 int err; 610 611 LOAD_PROGRAMS(progs); 612 613 /* check that the program is correctly loaded */ 614 ASSERT_EQ(self->skel->data->callback_check, 52) TH_LOG("callback_check1"); 615 ASSERT_EQ(self->skel->data->callback2_check, 52) TH_LOG("callback2_check1"); 616 617 /* inject one event */ 618 buf[0] = 1; 619 buf[1] = 42; 620 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 621 622 /* check that hid_first_event() was executed */ 623 ASSERT_EQ(self->skel->data->callback_check, 42) TH_LOG("callback_check1"); 624 625 /* read the data from hidraw */ 626 memset(buf, 0, sizeof(buf)); 627 err = read(self->hidraw_fd, buf, sizeof(buf)); 628 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 629 ASSERT_EQ(buf[0], 1); 630 ASSERT_EQ(buf[2], 47); 631 632 /* inject another event */ 633 memset(buf, 0, sizeof(buf)); 634 buf[0] = 1; 635 buf[1] = 47; 636 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 637 638 /* check that hid_first_event() was executed */ 639 ASSERT_EQ(self->skel->data->callback_check, 47) TH_LOG("callback_check1"); 640 641 /* read the data from hidraw */ 642 memset(buf, 0, sizeof(buf)); 643 err = read(self->hidraw_fd, buf, sizeof(buf)); 644 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 645 ASSERT_EQ(buf[2], 52); 646 } 647 648 /* 649 * Attach hid_first_event to the given uhid device, 650 * retrieve and open the matching hidraw node, 651 * inject one event in the uhid device, 652 * check that the program sees it and can change the data 653 */ 654 TEST_F(hid_bpf, subprog_raw_event) 655 { 656 const struct test_program progs[] = { 657 { .name = "hid_subprog_first_event" }, 658 }; 659 __u8 buf[10] = {0}; 660 int err; 661 662 LOAD_PROGRAMS(progs); 663 664 /* inject one event */ 665 buf[0] = 1; 666 buf[1] = 42; 667 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 668 669 /* read the data from hidraw */ 670 memset(buf, 0, sizeof(buf)); 671 err = read(self->hidraw_fd, buf, sizeof(buf)); 672 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 673 ASSERT_EQ(buf[0], 1); 674 ASSERT_EQ(buf[2], 47); 675 676 /* inject another event */ 677 memset(buf, 0, sizeof(buf)); 678 buf[0] = 1; 679 buf[1] = 47; 680 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 681 682 /* read the data from hidraw */ 683 memset(buf, 0, sizeof(buf)); 684 err = read(self->hidraw_fd, buf, sizeof(buf)); 685 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 686 ASSERT_EQ(buf[2], 52); 687 } 688 689 /* 690 * Ensures that we can attach/detach programs 691 */ 692 TEST_F(hid_bpf, test_attach_detach) 693 { 694 const struct test_program progs[] = { 695 { .name = "hid_first_event" }, 696 { .name = "hid_second_event" }, 697 }; 698 struct bpf_link *link; 699 __u8 buf[10] = {0}; 700 int err, link_fd; 701 702 LOAD_PROGRAMS(progs); 703 704 link = self->hid_links[0]; 705 ASSERT_OK_PTR(link) TH_LOG("HID-BPF link not created"); 706 707 link_fd = bpf_link__fd(link); 708 ASSERT_GE(link_fd, 0) TH_LOG("HID-BPF link FD not valid"); 709 710 /* inject one event */ 711 buf[0] = 1; 712 buf[1] = 42; 713 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 714 715 /* read the data from hidraw */ 716 memset(buf, 0, sizeof(buf)); 717 err = read(self->hidraw_fd, buf, sizeof(buf)); 718 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 719 ASSERT_EQ(buf[0], 1); 720 ASSERT_EQ(buf[2], 47); 721 722 /* make sure both programs are run */ 723 ASSERT_EQ(buf[3], 52); 724 725 /* pin the first program and immediately unpin it */ 726 #define PIN_PATH "/sys/fs/bpf/hid_first_event" 727 err = bpf_obj_pin(link_fd, PIN_PATH); 728 ASSERT_OK(err) TH_LOG("error while calling bpf_obj_pin"); 729 remove(PIN_PATH); 730 #undef PIN_PATH 731 usleep(100000); 732 733 /* detach the program */ 734 detach_bpf(self); 735 736 self->hidraw_fd = open_hidraw(self->dev_id); 737 ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); 738 739 /* inject another event */ 740 memset(buf, 0, sizeof(buf)); 741 buf[0] = 1; 742 buf[1] = 47; 743 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 744 745 /* read the data from hidraw */ 746 memset(buf, 0, sizeof(buf)); 747 err = read(self->hidraw_fd, buf, sizeof(buf)); 748 ASSERT_EQ(err, 6) TH_LOG("read_hidraw_no_bpf"); 749 ASSERT_EQ(buf[0], 1); 750 ASSERT_EQ(buf[1], 47); 751 ASSERT_EQ(buf[2], 0); 752 ASSERT_EQ(buf[3], 0); 753 754 /* re-attach our program */ 755 756 LOAD_PROGRAMS(progs); 757 758 /* inject one event */ 759 memset(buf, 0, sizeof(buf)); 760 buf[0] = 1; 761 buf[1] = 42; 762 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 763 764 /* read the data from hidraw */ 765 memset(buf, 0, sizeof(buf)); 766 err = read(self->hidraw_fd, buf, sizeof(buf)); 767 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 768 ASSERT_EQ(buf[0], 1); 769 ASSERT_EQ(buf[2], 47); 770 ASSERT_EQ(buf[3], 52); 771 } 772 773 /* 774 * Attach hid_change_report_id to the given uhid device, 775 * retrieve and open the matching hidraw node, 776 * inject one event in the uhid device, 777 * check that the program sees it and can change the data 778 */ 779 TEST_F(hid_bpf, test_hid_change_report) 780 { 781 const struct test_program progs[] = { 782 { .name = "hid_change_report_id" }, 783 }; 784 __u8 buf[10] = {0}; 785 int err; 786 787 LOAD_PROGRAMS(progs); 788 789 /* inject one event */ 790 buf[0] = 1; 791 buf[1] = 42; 792 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 793 794 /* read the data from hidraw */ 795 memset(buf, 0, sizeof(buf)); 796 err = read(self->hidraw_fd, buf, sizeof(buf)); 797 ASSERT_EQ(err, 9) TH_LOG("read_hidraw"); 798 ASSERT_EQ(buf[0], 2); 799 ASSERT_EQ(buf[1], 42); 800 ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test"); 801 } 802 803 /* 804 * Call hid_bpf_input_report against the given uhid device, 805 * check that the program is called and does the expected. 806 */ 807 TEST_F(hid_bpf, test_hid_user_input_report_call) 808 { 809 struct hid_hw_request_syscall_args args = { 810 .retval = -1, 811 .size = 10, 812 }; 813 DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, 814 .ctx_in = &args, 815 .ctx_size_in = sizeof(args), 816 ); 817 __u8 buf[10] = {0}; 818 int err, prog_fd; 819 820 LOAD_BPF; 821 822 args.hid = self->hid_id; 823 args.data[0] = 1; /* report ID */ 824 args.data[1] = 2; /* report ID */ 825 args.data[2] = 42; /* report ID */ 826 827 prog_fd = bpf_program__fd(self->skel->progs.hid_user_input_report); 828 829 /* check that there is no data to read from hidraw */ 830 memset(buf, 0, sizeof(buf)); 831 err = read(self->hidraw_fd, buf, sizeof(buf)); 832 ASSERT_EQ(err, -1) TH_LOG("read_hidraw"); 833 834 err = bpf_prog_test_run_opts(prog_fd, &tattrs); 835 836 ASSERT_OK(err) TH_LOG("error while calling bpf_prog_test_run_opts"); 837 838 ASSERT_EQ(args.retval, 0); 839 840 /* read the data from hidraw */ 841 memset(buf, 0, sizeof(buf)); 842 err = read(self->hidraw_fd, buf, sizeof(buf)); 843 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 844 ASSERT_EQ(buf[0], 1); 845 ASSERT_EQ(buf[1], 2); 846 ASSERT_EQ(buf[2], 42); 847 } 848 849 /* 850 * Call hid_bpf_hw_output_report against the given uhid device, 851 * check that the program is called and does the expected. 852 */ 853 TEST_F(hid_bpf, test_hid_user_output_report_call) 854 { 855 struct hid_hw_request_syscall_args args = { 856 .retval = -1, 857 .size = 10, 858 }; 859 DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, 860 .ctx_in = &args, 861 .ctx_size_in = sizeof(args), 862 ); 863 int err, cond_err, prog_fd; 864 struct timespec time_to_wait; 865 866 LOAD_BPF; 867 868 args.hid = self->hid_id; 869 args.data[0] = 1; /* report ID */ 870 args.data[1] = 2; /* report ID */ 871 args.data[2] = 42; /* report ID */ 872 873 prog_fd = bpf_program__fd(self->skel->progs.hid_user_output_report); 874 875 pthread_mutex_lock(&uhid_output_mtx); 876 877 memset(output_report, 0, sizeof(output_report)); 878 clock_gettime(CLOCK_REALTIME, &time_to_wait); 879 time_to_wait.tv_sec += 2; 880 881 err = bpf_prog_test_run_opts(prog_fd, &tattrs); 882 cond_err = pthread_cond_timedwait(&uhid_output_cond, &uhid_output_mtx, &time_to_wait); 883 884 ASSERT_OK(err) TH_LOG("error while calling bpf_prog_test_run_opts"); 885 ASSERT_OK(cond_err) TH_LOG("error while calling waiting for the condition"); 886 887 ASSERT_EQ(args.retval, 3); 888 889 ASSERT_EQ(output_report[0], 1); 890 ASSERT_EQ(output_report[1], 2); 891 ASSERT_EQ(output_report[2], 42); 892 893 pthread_mutex_unlock(&uhid_output_mtx); 894 } 895 896 /* 897 * Call hid_hw_raw_request against the given uhid device, 898 * check that the program is called and does the expected. 899 */ 900 TEST_F(hid_bpf, test_hid_user_raw_request_call) 901 { 902 struct hid_hw_request_syscall_args args = { 903 .retval = -1, 904 .type = HID_FEATURE_REPORT, 905 .request_type = HID_REQ_GET_REPORT, 906 .size = 10, 907 }; 908 DECLARE_LIBBPF_OPTS(bpf_test_run_opts, tattrs, 909 .ctx_in = &args, 910 .ctx_size_in = sizeof(args), 911 ); 912 int err, prog_fd; 913 914 LOAD_BPF; 915 916 args.hid = self->hid_id; 917 args.data[0] = 1; /* report ID */ 918 919 prog_fd = bpf_program__fd(self->skel->progs.hid_user_raw_request); 920 921 err = bpf_prog_test_run_opts(prog_fd, &tattrs); 922 ASSERT_OK(err) TH_LOG("error while calling bpf_prog_test_run_opts"); 923 924 ASSERT_EQ(args.retval, 2); 925 926 ASSERT_EQ(args.data[1], 2); 927 } 928 929 /* 930 * Call hid_hw_raw_request against the given uhid device, 931 * check that the program is called and prevents the 932 * call to uhid. 933 */ 934 TEST_F(hid_bpf, test_hid_filter_raw_request_call) 935 { 936 const struct test_program progs[] = { 937 { .name = "hid_test_filter_raw_request" }, 938 }; 939 __u8 buf[10] = {0}; 940 int err; 941 942 LOAD_PROGRAMS(progs); 943 944 /* first check that we did not attach to device_event */ 945 946 /* inject one event */ 947 buf[0] = 1; 948 buf[1] = 42; 949 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 950 951 /* read the data from hidraw */ 952 memset(buf, 0, sizeof(buf)); 953 err = read(self->hidraw_fd, buf, sizeof(buf)); 954 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 955 ASSERT_EQ(buf[0], 1); 956 ASSERT_EQ(buf[1], 42); 957 ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test"); 958 959 /* now check that our program is preventing hid_hw_raw_request() */ 960 961 /* emit hid_hw_raw_request from hidraw */ 962 /* Get Feature */ 963 memset(buf, 0, sizeof(buf)); 964 buf[0] = 0x1; /* Report Number */ 965 err = ioctl(self->hidraw_fd, HIDIOCGFEATURE(sizeof(buf)), buf); 966 ASSERT_LT(err, 0) TH_LOG("unexpected success while reading HIDIOCGFEATURE: %d", err); 967 ASSERT_EQ(errno, 20) TH_LOG("unexpected error code while reading HIDIOCGFEATURE: %d", 968 errno); 969 970 /* remove our bpf program and check that we can now emit commands */ 971 972 /* detach the program */ 973 detach_bpf(self); 974 975 self->hidraw_fd = open_hidraw(self->dev_id); 976 ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); 977 978 err = ioctl(self->hidraw_fd, HIDIOCGFEATURE(sizeof(buf)), buf); 979 ASSERT_GE(err, 0) TH_LOG("error while reading HIDIOCGFEATURE: %d", err); 980 } 981 982 /* 983 * Call hid_hw_raw_request against the given uhid device, 984 * check that the program is called and can issue the call 985 * to uhid and transform the answer. 986 */ 987 TEST_F(hid_bpf, test_hid_change_raw_request_call) 988 { 989 const struct test_program progs[] = { 990 { .name = "hid_test_hidraw_raw_request" }, 991 }; 992 __u8 buf[10] = {0}; 993 int err; 994 995 LOAD_PROGRAMS(progs); 996 997 /* emit hid_hw_raw_request from hidraw */ 998 /* Get Feature */ 999 memset(buf, 0, sizeof(buf)); 1000 buf[0] = 0x1; /* Report Number */ 1001 err = ioctl(self->hidraw_fd, HIDIOCGFEATURE(sizeof(buf)), buf); 1002 ASSERT_EQ(err, 3) TH_LOG("unexpected returned size while reading HIDIOCGFEATURE: %d", err); 1003 1004 ASSERT_EQ(buf[0], 2); 1005 ASSERT_EQ(buf[1], 3); 1006 ASSERT_EQ(buf[2], 4); 1007 } 1008 1009 /* 1010 * Call hid_hw_raw_request against the given uhid device, 1011 * check that the program is not making infinite loops. 1012 */ 1013 TEST_F(hid_bpf, test_hid_infinite_loop_raw_request_call) 1014 { 1015 const struct test_program progs[] = { 1016 { .name = "hid_test_infinite_loop_raw_request" }, 1017 }; 1018 __u8 buf[10] = {0}; 1019 int err; 1020 1021 LOAD_PROGRAMS(progs); 1022 1023 /* emit hid_hw_raw_request from hidraw */ 1024 /* Get Feature */ 1025 memset(buf, 0, sizeof(buf)); 1026 buf[0] = 0x1; /* Report Number */ 1027 err = ioctl(self->hidraw_fd, HIDIOCGFEATURE(sizeof(buf)), buf); 1028 ASSERT_EQ(err, 3) TH_LOG("unexpected returned size while reading HIDIOCGFEATURE: %d", err); 1029 } 1030 1031 /* 1032 * Call hid_hw_output_report against the given uhid device, 1033 * check that the program is called and prevents the 1034 * call to uhid. 1035 */ 1036 TEST_F(hid_bpf, test_hid_filter_output_report_call) 1037 { 1038 const struct test_program progs[] = { 1039 { .name = "hid_test_filter_output_report" }, 1040 }; 1041 __u8 buf[10] = {0}; 1042 int err; 1043 1044 LOAD_PROGRAMS(progs); 1045 1046 /* first check that we did not attach to device_event */ 1047 1048 /* inject one event */ 1049 buf[0] = 1; 1050 buf[1] = 42; 1051 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 1052 1053 /* read the data from hidraw */ 1054 memset(buf, 0, sizeof(buf)); 1055 err = read(self->hidraw_fd, buf, sizeof(buf)); 1056 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 1057 ASSERT_EQ(buf[0], 1); 1058 ASSERT_EQ(buf[1], 42); 1059 ASSERT_EQ(buf[2], 0) TH_LOG("leftovers_from_previous_test"); 1060 1061 /* now check that our program is preventing hid_hw_output_report() */ 1062 1063 buf[0] = 1; /* report ID */ 1064 buf[1] = 2; 1065 buf[2] = 42; 1066 1067 err = write(self->hidraw_fd, buf, 3); 1068 ASSERT_LT(err, 0) TH_LOG("unexpected success while sending hid_hw_output_report: %d", err); 1069 ASSERT_EQ(errno, 25) TH_LOG("unexpected error code while sending hid_hw_output_report: %d", 1070 errno); 1071 1072 /* remove our bpf program and check that we can now emit commands */ 1073 1074 /* detach the program */ 1075 detach_bpf(self); 1076 1077 self->hidraw_fd = open_hidraw(self->dev_id); 1078 ASSERT_GE(self->hidraw_fd, 0) TH_LOG("open_hidraw"); 1079 1080 err = write(self->hidraw_fd, buf, 3); 1081 ASSERT_GE(err, 0) TH_LOG("error while sending hid_hw_output_report: %d", err); 1082 } 1083 1084 /* 1085 * Call hid_hw_output_report against the given uhid device, 1086 * check that the program is called and can issue the call 1087 * to uhid and transform the answer. 1088 */ 1089 TEST_F(hid_bpf, test_hid_change_output_report_call) 1090 { 1091 const struct test_program progs[] = { 1092 { .name = "hid_test_hidraw_output_report" }, 1093 }; 1094 __u8 buf[10] = {0}; 1095 int err; 1096 1097 LOAD_PROGRAMS(progs); 1098 1099 /* emit hid_hw_output_report from hidraw */ 1100 buf[0] = 1; /* report ID */ 1101 buf[1] = 2; 1102 buf[2] = 42; 1103 1104 err = write(self->hidraw_fd, buf, 10); 1105 ASSERT_EQ(err, 2) TH_LOG("unexpected returned size while sending hid_hw_output_report: %d", 1106 err); 1107 } 1108 1109 /* 1110 * Call hid_hw_output_report against the given uhid device, 1111 * check that the program is not making infinite loops. 1112 */ 1113 TEST_F(hid_bpf, test_hid_infinite_loop_output_report_call) 1114 { 1115 const struct test_program progs[] = { 1116 { .name = "hid_test_infinite_loop_output_report" }, 1117 }; 1118 __u8 buf[10] = {0}; 1119 int err; 1120 1121 LOAD_PROGRAMS(progs); 1122 1123 /* emit hid_hw_output_report from hidraw */ 1124 buf[0] = 1; /* report ID */ 1125 buf[1] = 2; 1126 buf[2] = 42; 1127 1128 err = write(self->hidraw_fd, buf, 8); 1129 ASSERT_EQ(err, 2) TH_LOG("unexpected returned size while sending hid_hw_output_report: %d", 1130 err); 1131 } 1132 1133 /* 1134 * Attach hid_multiply_event_wq to the given uhid device, 1135 * retrieve and open the matching hidraw node, 1136 * inject one event in the uhid device, 1137 * check that the program sees it and can add extra data 1138 */ 1139 TEST_F(hid_bpf, test_multiply_events_wq) 1140 { 1141 const struct test_program progs[] = { 1142 { .name = "hid_test_multiply_events_wq" }, 1143 }; 1144 __u8 buf[10] = {0}; 1145 int err; 1146 1147 LOAD_PROGRAMS(progs); 1148 1149 /* inject one event */ 1150 buf[0] = 1; 1151 buf[1] = 42; 1152 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 1153 1154 /* read the data from hidraw */ 1155 memset(buf, 0, sizeof(buf)); 1156 err = read(self->hidraw_fd, buf, sizeof(buf)); 1157 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 1158 ASSERT_EQ(buf[0], 1); 1159 ASSERT_EQ(buf[1], 47); 1160 1161 usleep(100000); 1162 1163 /* read the data from hidraw */ 1164 memset(buf, 0, sizeof(buf)); 1165 err = read(self->hidraw_fd, buf, sizeof(buf)); 1166 ASSERT_EQ(err, 9) TH_LOG("read_hidraw"); 1167 ASSERT_EQ(buf[0], 2); 1168 ASSERT_EQ(buf[1], 3); 1169 } 1170 1171 /* 1172 * Attach hid_multiply_event to the given uhid device, 1173 * retrieve and open the matching hidraw node, 1174 * inject one event in the uhid device, 1175 * check that the program sees it and can add extra data 1176 */ 1177 TEST_F(hid_bpf, test_multiply_events) 1178 { 1179 const struct test_program progs[] = { 1180 { .name = "hid_test_multiply_events" }, 1181 }; 1182 __u8 buf[10] = {0}; 1183 int err; 1184 1185 LOAD_PROGRAMS(progs); 1186 1187 /* inject one event */ 1188 buf[0] = 1; 1189 buf[1] = 42; 1190 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 1191 1192 /* read the data from hidraw */ 1193 memset(buf, 0, sizeof(buf)); 1194 err = read(self->hidraw_fd, buf, sizeof(buf)); 1195 ASSERT_EQ(err, 9) TH_LOG("read_hidraw"); 1196 ASSERT_EQ(buf[0], 2); 1197 ASSERT_EQ(buf[1], 47); 1198 1199 /* read the data from hidraw */ 1200 memset(buf, 0, sizeof(buf)); 1201 err = read(self->hidraw_fd, buf, sizeof(buf)); 1202 ASSERT_EQ(err, 9) TH_LOG("read_hidraw"); 1203 ASSERT_EQ(buf[0], 2); 1204 ASSERT_EQ(buf[1], 52); 1205 } 1206 1207 /* 1208 * Call hid_bpf_input_report against the given uhid device, 1209 * check that the program is not making infinite loops. 1210 */ 1211 TEST_F(hid_bpf, test_hid_infinite_loop_input_report_call) 1212 { 1213 const struct test_program progs[] = { 1214 { .name = "hid_test_infinite_loop_input_report" }, 1215 }; 1216 __u8 buf[10] = {0}; 1217 int err; 1218 1219 LOAD_PROGRAMS(progs); 1220 1221 /* emit hid_hw_output_report from hidraw */ 1222 buf[0] = 1; /* report ID */ 1223 buf[1] = 2; 1224 buf[2] = 42; 1225 1226 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 1227 1228 /* read the data from hidraw */ 1229 memset(buf, 0, sizeof(buf)); 1230 err = read(self->hidraw_fd, buf, sizeof(buf)); 1231 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 1232 ASSERT_EQ(buf[0], 1); 1233 ASSERT_EQ(buf[1], 3); 1234 1235 /* read the data from hidraw: hid_bpf_try_input_report should work exactly one time */ 1236 memset(buf, 0, sizeof(buf)); 1237 err = read(self->hidraw_fd, buf, sizeof(buf)); 1238 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 1239 ASSERT_EQ(buf[0], 1); 1240 ASSERT_EQ(buf[1], 4); 1241 1242 /* read the data from hidraw: there should be none */ 1243 memset(buf, 0, sizeof(buf)); 1244 err = read(self->hidraw_fd, buf, sizeof(buf)); 1245 ASSERT_EQ(err, -1) TH_LOG("read_hidraw"); 1246 } 1247 1248 /* 1249 * Attach hid_insert{0,1,2} to the given uhid device, 1250 * retrieve and open the matching hidraw node, 1251 * inject one event in the uhid device, 1252 * check that the programs have been inserted in the correct order. 1253 */ 1254 TEST_F(hid_bpf, test_hid_attach_flags) 1255 { 1256 const struct test_program progs[] = { 1257 { 1258 .name = "hid_test_insert2", 1259 .insert_head = 0, 1260 }, 1261 { 1262 .name = "hid_test_insert1", 1263 .insert_head = 1, 1264 }, 1265 { 1266 .name = "hid_test_insert3", 1267 .insert_head = 0, 1268 }, 1269 }; 1270 __u8 buf[10] = {0}; 1271 int err; 1272 1273 LOAD_PROGRAMS(progs); 1274 1275 /* inject one event */ 1276 buf[0] = 1; 1277 uhid_send_event(_metadata, self->uhid_fd, buf, 6); 1278 1279 /* read the data from hidraw */ 1280 memset(buf, 0, sizeof(buf)); 1281 err = read(self->hidraw_fd, buf, sizeof(buf)); 1282 ASSERT_EQ(err, 6) TH_LOG("read_hidraw"); 1283 ASSERT_EQ(buf[1], 1); 1284 ASSERT_EQ(buf[2], 2); 1285 ASSERT_EQ(buf[3], 3); 1286 } 1287 1288 /* 1289 * Attach hid_rdesc_fixup to the given uhid device, 1290 * retrieve and open the matching hidraw node, 1291 * check that the hidraw report descriptor has been updated. 1292 */ 1293 TEST_F(hid_bpf, test_rdesc_fixup) 1294 { 1295 struct hidraw_report_descriptor rpt_desc = {0}; 1296 const struct test_program progs[] = { 1297 { .name = "hid_rdesc_fixup" }, 1298 }; 1299 int err, desc_size; 1300 1301 LOAD_PROGRAMS(progs); 1302 1303 /* check that hid_rdesc_fixup() was executed */ 1304 ASSERT_EQ(self->skel->data->callback2_check, 0x21); 1305 1306 /* read the exposed report descriptor from hidraw */ 1307 err = ioctl(self->hidraw_fd, HIDIOCGRDESCSIZE, &desc_size); 1308 ASSERT_GE(err, 0) TH_LOG("error while reading HIDIOCGRDESCSIZE: %d", err); 1309 1310 /* ensure the new size of the rdesc is bigger than the old one */ 1311 ASSERT_GT(desc_size, sizeof(rdesc)); 1312 1313 rpt_desc.size = desc_size; 1314 err = ioctl(self->hidraw_fd, HIDIOCGRDESC, &rpt_desc); 1315 ASSERT_GE(err, 0) TH_LOG("error while reading HIDIOCGRDESC: %d", err); 1316 1317 ASSERT_EQ(rpt_desc.value[4], 0x42); 1318 } 1319 1320 static int libbpf_print_fn(enum libbpf_print_level level, 1321 const char *format, va_list args) 1322 { 1323 char buf[1024]; 1324 1325 if (level == LIBBPF_DEBUG) 1326 return 0; 1327 1328 snprintf(buf, sizeof(buf), "# %s", format); 1329 1330 vfprintf(stdout, buf, args); 1331 return 0; 1332 } 1333 1334 static void __attribute__((constructor)) __constructor_order_last(void) 1335 { 1336 if (!__constructor_order) 1337 __constructor_order = _CONSTRUCTOR_ORDER_BACKWARD; 1338 } 1339 1340 int main(int argc, char **argv) 1341 { 1342 /* Use libbpf 1.0 API mode */ 1343 libbpf_set_strict_mode(LIBBPF_STRICT_ALL); 1344 libbpf_set_print(libbpf_print_fn); 1345 1346 return test_harness_run(argc, argv); 1347 } 1348