1 /* Bluetooth HCI driver model support. */ 2 3 #include <linux/debugfs.h> 4 #include <linux/module.h> 5 6 #include <net/bluetooth/bluetooth.h> 7 #include <net/bluetooth/hci_core.h> 8 9 static struct class *bt_class; 10 11 struct dentry *bt_debugfs; 12 EXPORT_SYMBOL_GPL(bt_debugfs); 13 14 static inline char *link_typetostr(int type) 15 { 16 switch (type) { 17 case ACL_LINK: 18 return "ACL"; 19 case SCO_LINK: 20 return "SCO"; 21 case ESCO_LINK: 22 return "eSCO"; 23 case LE_LINK: 24 return "LE"; 25 default: 26 return "UNKNOWN"; 27 } 28 } 29 30 static ssize_t show_link_type(struct device *dev, 31 struct device_attribute *attr, char *buf) 32 { 33 struct hci_conn *conn = to_hci_conn(dev); 34 return sprintf(buf, "%s\n", link_typetostr(conn->type)); 35 } 36 37 static ssize_t show_link_address(struct device *dev, 38 struct device_attribute *attr, char *buf) 39 { 40 struct hci_conn *conn = to_hci_conn(dev); 41 return sprintf(buf, "%s\n", batostr(&conn->dst)); 42 } 43 44 static ssize_t show_link_features(struct device *dev, 45 struct device_attribute *attr, char *buf) 46 { 47 struct hci_conn *conn = to_hci_conn(dev); 48 49 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 50 conn->features[0], conn->features[1], 51 conn->features[2], conn->features[3], 52 conn->features[4], conn->features[5], 53 conn->features[6], conn->features[7]); 54 } 55 56 #define LINK_ATTR(_name, _mode, _show, _store) \ 57 struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store) 58 59 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); 60 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); 61 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); 62 63 static struct attribute *bt_link_attrs[] = { 64 &link_attr_type.attr, 65 &link_attr_address.attr, 66 &link_attr_features.attr, 67 NULL 68 }; 69 70 static struct attribute_group bt_link_group = { 71 .attrs = bt_link_attrs, 72 }; 73 74 static const struct attribute_group *bt_link_groups[] = { 75 &bt_link_group, 76 NULL 77 }; 78 79 static void bt_link_release(struct device *dev) 80 { 81 struct hci_conn *conn = to_hci_conn(dev); 82 kfree(conn); 83 } 84 85 static struct device_type bt_link = { 86 .name = "link", 87 .groups = bt_link_groups, 88 .release = bt_link_release, 89 }; 90 91 /* 92 * The rfcomm tty device will possibly retain even when conn 93 * is down, and sysfs doesn't support move zombie device, 94 * so we should move the device before conn device is destroyed. 95 */ 96 static int __match_tty(struct device *dev, void *data) 97 { 98 return !strncmp(dev_name(dev), "rfcomm", 6); 99 } 100 101 void hci_conn_init_sysfs(struct hci_conn *conn) 102 { 103 struct hci_dev *hdev = conn->hdev; 104 105 BT_DBG("conn %p", conn); 106 107 conn->dev.type = &bt_link; 108 conn->dev.class = bt_class; 109 conn->dev.parent = &hdev->dev; 110 111 device_initialize(&conn->dev); 112 } 113 114 void hci_conn_add_sysfs(struct hci_conn *conn) 115 { 116 struct hci_dev *hdev = conn->hdev; 117 118 BT_DBG("conn %p", conn); 119 120 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); 121 122 if (device_add(&conn->dev) < 0) { 123 BT_ERR("Failed to register connection device"); 124 return; 125 } 126 127 hci_dev_hold(hdev); 128 } 129 130 void hci_conn_del_sysfs(struct hci_conn *conn) 131 { 132 struct hci_dev *hdev = conn->hdev; 133 134 if (!device_is_registered(&conn->dev)) 135 return; 136 137 while (1) { 138 struct device *dev; 139 140 dev = device_find_child(&conn->dev, NULL, __match_tty); 141 if (!dev) 142 break; 143 device_move(dev, NULL, DPM_ORDER_DEV_LAST); 144 put_device(dev); 145 } 146 147 device_del(&conn->dev); 148 put_device(&conn->dev); 149 150 hci_dev_put(hdev); 151 } 152 153 static inline char *host_bustostr(int bus) 154 { 155 switch (bus) { 156 case HCI_VIRTUAL: 157 return "VIRTUAL"; 158 case HCI_USB: 159 return "USB"; 160 case HCI_PCCARD: 161 return "PCCARD"; 162 case HCI_UART: 163 return "UART"; 164 case HCI_RS232: 165 return "RS232"; 166 case HCI_PCI: 167 return "PCI"; 168 case HCI_SDIO: 169 return "SDIO"; 170 default: 171 return "UNKNOWN"; 172 } 173 } 174 175 static inline char *host_typetostr(int type) 176 { 177 switch (type) { 178 case HCI_BREDR: 179 return "BR/EDR"; 180 case HCI_AMP: 181 return "AMP"; 182 default: 183 return "UNKNOWN"; 184 } 185 } 186 187 static ssize_t show_bus(struct device *dev, 188 struct device_attribute *attr, char *buf) 189 { 190 struct hci_dev *hdev = to_hci_dev(dev); 191 return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); 192 } 193 194 static ssize_t show_type(struct device *dev, 195 struct device_attribute *attr, char *buf) 196 { 197 struct hci_dev *hdev = to_hci_dev(dev); 198 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); 199 } 200 201 static ssize_t show_name(struct device *dev, 202 struct device_attribute *attr, char *buf) 203 { 204 struct hci_dev *hdev = to_hci_dev(dev); 205 char name[HCI_MAX_NAME_LENGTH + 1]; 206 int i; 207 208 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++) 209 name[i] = hdev->dev_name[i]; 210 211 name[HCI_MAX_NAME_LENGTH] = '\0'; 212 return sprintf(buf, "%s\n", name); 213 } 214 215 static ssize_t show_class(struct device *dev, 216 struct device_attribute *attr, char *buf) 217 { 218 struct hci_dev *hdev = to_hci_dev(dev); 219 return sprintf(buf, "0x%.2x%.2x%.2x\n", hdev->dev_class[2], 220 hdev->dev_class[1], hdev->dev_class[0]); 221 } 222 223 static ssize_t show_address(struct device *dev, 224 struct device_attribute *attr, char *buf) 225 { 226 struct hci_dev *hdev = to_hci_dev(dev); 227 return sprintf(buf, "%s\n", batostr(&hdev->bdaddr)); 228 } 229 230 static ssize_t show_features(struct device *dev, 231 struct device_attribute *attr, char *buf) 232 { 233 struct hci_dev *hdev = to_hci_dev(dev); 234 235 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 236 hdev->features[0], hdev->features[1], 237 hdev->features[2], hdev->features[3], 238 hdev->features[4], hdev->features[5], 239 hdev->features[6], hdev->features[7]); 240 } 241 242 static ssize_t show_manufacturer(struct device *dev, 243 struct device_attribute *attr, char *buf) 244 { 245 struct hci_dev *hdev = to_hci_dev(dev); 246 return sprintf(buf, "%d\n", hdev->manufacturer); 247 } 248 249 static ssize_t show_hci_version(struct device *dev, 250 struct device_attribute *attr, char *buf) 251 { 252 struct hci_dev *hdev = to_hci_dev(dev); 253 return sprintf(buf, "%d\n", hdev->hci_ver); 254 } 255 256 static ssize_t show_hci_revision(struct device *dev, 257 struct device_attribute *attr, char *buf) 258 { 259 struct hci_dev *hdev = to_hci_dev(dev); 260 return sprintf(buf, "%d\n", hdev->hci_rev); 261 } 262 263 static ssize_t show_idle_timeout(struct device *dev, 264 struct device_attribute *attr, char *buf) 265 { 266 struct hci_dev *hdev = to_hci_dev(dev); 267 return sprintf(buf, "%d\n", hdev->idle_timeout); 268 } 269 270 static ssize_t store_idle_timeout(struct device *dev, 271 struct device_attribute *attr, 272 const char *buf, size_t count) 273 { 274 struct hci_dev *hdev = to_hci_dev(dev); 275 unsigned int val; 276 int rv; 277 278 rv = kstrtouint(buf, 0, &val); 279 if (rv < 0) 280 return rv; 281 282 if (val != 0 && (val < 500 || val > 3600000)) 283 return -EINVAL; 284 285 hdev->idle_timeout = val; 286 287 return count; 288 } 289 290 static ssize_t show_sniff_max_interval(struct device *dev, 291 struct device_attribute *attr, char *buf) 292 { 293 struct hci_dev *hdev = to_hci_dev(dev); 294 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 295 } 296 297 static ssize_t store_sniff_max_interval(struct device *dev, 298 struct device_attribute *attr, 299 const char *buf, size_t count) 300 { 301 struct hci_dev *hdev = to_hci_dev(dev); 302 u16 val; 303 int rv; 304 305 rv = kstrtou16(buf, 0, &val); 306 if (rv < 0) 307 return rv; 308 309 if (val == 0 || val % 2 || val < hdev->sniff_min_interval) 310 return -EINVAL; 311 312 hdev->sniff_max_interval = val; 313 314 return count; 315 } 316 317 static ssize_t show_sniff_min_interval(struct device *dev, 318 struct device_attribute *attr, char *buf) 319 { 320 struct hci_dev *hdev = to_hci_dev(dev); 321 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 322 } 323 324 static ssize_t store_sniff_min_interval(struct device *dev, 325 struct device_attribute *attr, 326 const char *buf, size_t count) 327 { 328 struct hci_dev *hdev = to_hci_dev(dev); 329 u16 val; 330 int rv; 331 332 rv = kstrtou16(buf, 0, &val); 333 if (rv < 0) 334 return rv; 335 336 if (val == 0 || val % 2 || val > hdev->sniff_max_interval) 337 return -EINVAL; 338 339 hdev->sniff_min_interval = val; 340 341 return count; 342 } 343 344 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); 345 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 346 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 347 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 348 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 349 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 350 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 351 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 352 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 353 354 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 355 show_idle_timeout, store_idle_timeout); 356 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 357 show_sniff_max_interval, store_sniff_max_interval); 358 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 359 show_sniff_min_interval, store_sniff_min_interval); 360 361 static struct attribute *bt_host_attrs[] = { 362 &dev_attr_bus.attr, 363 &dev_attr_type.attr, 364 &dev_attr_name.attr, 365 &dev_attr_class.attr, 366 &dev_attr_address.attr, 367 &dev_attr_features.attr, 368 &dev_attr_manufacturer.attr, 369 &dev_attr_hci_version.attr, 370 &dev_attr_hci_revision.attr, 371 &dev_attr_idle_timeout.attr, 372 &dev_attr_sniff_max_interval.attr, 373 &dev_attr_sniff_min_interval.attr, 374 NULL 375 }; 376 377 static struct attribute_group bt_host_group = { 378 .attrs = bt_host_attrs, 379 }; 380 381 static const struct attribute_group *bt_host_groups[] = { 382 &bt_host_group, 383 NULL 384 }; 385 386 static void bt_host_release(struct device *dev) 387 { 388 struct hci_dev *hdev = to_hci_dev(dev); 389 kfree(hdev); 390 module_put(THIS_MODULE); 391 } 392 393 static struct device_type bt_host = { 394 .name = "host", 395 .groups = bt_host_groups, 396 .release = bt_host_release, 397 }; 398 399 static int inquiry_cache_show(struct seq_file *f, void *p) 400 { 401 struct hci_dev *hdev = f->private; 402 struct discovery_state *cache = &hdev->discovery; 403 struct inquiry_entry *e; 404 405 hci_dev_lock(hdev); 406 407 list_for_each_entry(e, &cache->all, all) { 408 struct inquiry_data *data = &e->data; 409 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", 410 batostr(&data->bdaddr), 411 data->pscan_rep_mode, data->pscan_period_mode, 412 data->pscan_mode, data->dev_class[2], 413 data->dev_class[1], data->dev_class[0], 414 __le16_to_cpu(data->clock_offset), 415 data->rssi, data->ssp_mode, e->timestamp); 416 } 417 418 hci_dev_unlock(hdev); 419 420 return 0; 421 } 422 423 static int inquiry_cache_open(struct inode *inode, struct file *file) 424 { 425 return single_open(file, inquiry_cache_show, inode->i_private); 426 } 427 428 static const struct file_operations inquiry_cache_fops = { 429 .open = inquiry_cache_open, 430 .read = seq_read, 431 .llseek = seq_lseek, 432 .release = single_release, 433 }; 434 435 static int blacklist_show(struct seq_file *f, void *p) 436 { 437 struct hci_dev *hdev = f->private; 438 struct bdaddr_list *b; 439 440 hci_dev_lock(hdev); 441 442 list_for_each_entry(b, &hdev->blacklist, list) 443 seq_printf(f, "%s\n", batostr(&b->bdaddr)); 444 445 hci_dev_unlock(hdev); 446 447 return 0; 448 } 449 450 static int blacklist_open(struct inode *inode, struct file *file) 451 { 452 return single_open(file, blacklist_show, inode->i_private); 453 } 454 455 static const struct file_operations blacklist_fops = { 456 .open = blacklist_open, 457 .read = seq_read, 458 .llseek = seq_lseek, 459 .release = single_release, 460 }; 461 462 static void print_bt_uuid(struct seq_file *f, u8 *uuid) 463 { 464 __be32 data0, data4; 465 __be16 data1, data2, data3, data5; 466 467 memcpy(&data0, &uuid[0], 4); 468 memcpy(&data1, &uuid[4], 2); 469 memcpy(&data2, &uuid[6], 2); 470 memcpy(&data3, &uuid[8], 2); 471 memcpy(&data4, &uuid[10], 4); 472 memcpy(&data5, &uuid[14], 2); 473 474 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n", 475 ntohl(data0), ntohs(data1), ntohs(data2), ntohs(data3), 476 ntohl(data4), ntohs(data5)); 477 } 478 479 static int uuids_show(struct seq_file *f, void *p) 480 { 481 struct hci_dev *hdev = f->private; 482 struct bt_uuid *uuid; 483 484 hci_dev_lock(hdev); 485 486 list_for_each_entry(uuid, &hdev->uuids, list) 487 print_bt_uuid(f, uuid->uuid); 488 489 hci_dev_unlock(hdev); 490 491 return 0; 492 } 493 494 static int uuids_open(struct inode *inode, struct file *file) 495 { 496 return single_open(file, uuids_show, inode->i_private); 497 } 498 499 static const struct file_operations uuids_fops = { 500 .open = uuids_open, 501 .read = seq_read, 502 .llseek = seq_lseek, 503 .release = single_release, 504 }; 505 506 static int auto_accept_delay_set(void *data, u64 val) 507 { 508 struct hci_dev *hdev = data; 509 510 hci_dev_lock(hdev); 511 512 hdev->auto_accept_delay = val; 513 514 hci_dev_unlock(hdev); 515 516 return 0; 517 } 518 519 static int auto_accept_delay_get(void *data, u64 *val) 520 { 521 struct hci_dev *hdev = data; 522 523 hci_dev_lock(hdev); 524 525 *val = hdev->auto_accept_delay; 526 527 hci_dev_unlock(hdev); 528 529 return 0; 530 } 531 532 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get, 533 auto_accept_delay_set, "%llu\n"); 534 535 void hci_init_sysfs(struct hci_dev *hdev) 536 { 537 struct device *dev = &hdev->dev; 538 539 dev->type = &bt_host; 540 dev->class = bt_class; 541 542 __module_get(THIS_MODULE); 543 device_initialize(dev); 544 } 545 546 int hci_add_sysfs(struct hci_dev *hdev) 547 { 548 struct device *dev = &hdev->dev; 549 int err; 550 551 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 552 553 dev_set_name(dev, "%s", hdev->name); 554 555 err = device_add(dev); 556 if (err < 0) 557 return err; 558 559 if (!bt_debugfs) 560 return 0; 561 562 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); 563 if (!hdev->debugfs) 564 return 0; 565 566 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, 567 hdev, &inquiry_cache_fops); 568 569 debugfs_create_file("blacklist", 0444, hdev->debugfs, 570 hdev, &blacklist_fops); 571 572 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops); 573 574 debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev, 575 &auto_accept_delay_fops); 576 return 0; 577 } 578 579 void hci_del_sysfs(struct hci_dev *hdev) 580 { 581 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 582 583 debugfs_remove_recursive(hdev->debugfs); 584 585 device_del(&hdev->dev); 586 } 587 588 int __init bt_sysfs_init(void) 589 { 590 bt_debugfs = debugfs_create_dir("bluetooth", NULL); 591 592 bt_class = class_create(THIS_MODULE, "bluetooth"); 593 if (IS_ERR(bt_class)) 594 return PTR_ERR(bt_class); 595 596 return 0; 597 } 598 599 void bt_sysfs_cleanup(void) 600 { 601 class_destroy(bt_class); 602 603 debugfs_remove_recursive(bt_debugfs); 604 } 605