1 /* Bluetooth HCI driver model support. */ 2 3 #include <linux/debugfs.h> 4 #include <linux/module.h> 5 #include <asm/unaligned.h> 6 7 #include <net/bluetooth/bluetooth.h> 8 #include <net/bluetooth/hci_core.h> 9 10 static struct class *bt_class; 11 12 struct dentry *bt_debugfs; 13 EXPORT_SYMBOL_GPL(bt_debugfs); 14 15 static inline char *link_typetostr(int type) 16 { 17 switch (type) { 18 case ACL_LINK: 19 return "ACL"; 20 case SCO_LINK: 21 return "SCO"; 22 case ESCO_LINK: 23 return "eSCO"; 24 case LE_LINK: 25 return "LE"; 26 default: 27 return "UNKNOWN"; 28 } 29 } 30 31 static ssize_t show_link_type(struct device *dev, 32 struct device_attribute *attr, char *buf) 33 { 34 struct hci_conn *conn = to_hci_conn(dev); 35 return sprintf(buf, "%s\n", link_typetostr(conn->type)); 36 } 37 38 static ssize_t show_link_address(struct device *dev, 39 struct device_attribute *attr, char *buf) 40 { 41 struct hci_conn *conn = to_hci_conn(dev); 42 return sprintf(buf, "%pMR\n", &conn->dst); 43 } 44 45 static ssize_t show_link_features(struct device *dev, 46 struct device_attribute *attr, char *buf) 47 { 48 struct hci_conn *conn = to_hci_conn(dev); 49 50 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 51 conn->features[0], conn->features[1], 52 conn->features[2], conn->features[3], 53 conn->features[4], conn->features[5], 54 conn->features[6], conn->features[7]); 55 } 56 57 #define LINK_ATTR(_name, _mode, _show, _store) \ 58 struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store) 59 60 static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); 61 static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); 62 static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); 63 64 static struct attribute *bt_link_attrs[] = { 65 &link_attr_type.attr, 66 &link_attr_address.attr, 67 &link_attr_features.attr, 68 NULL 69 }; 70 71 static struct attribute_group bt_link_group = { 72 .attrs = bt_link_attrs, 73 }; 74 75 static const struct attribute_group *bt_link_groups[] = { 76 &bt_link_group, 77 NULL 78 }; 79 80 static void bt_link_release(struct device *dev) 81 { 82 struct hci_conn *conn = to_hci_conn(dev); 83 kfree(conn); 84 } 85 86 static struct device_type bt_link = { 87 .name = "link", 88 .groups = bt_link_groups, 89 .release = bt_link_release, 90 }; 91 92 /* 93 * The rfcomm tty device will possibly retain even when conn 94 * is down, and sysfs doesn't support move zombie device, 95 * so we should move the device before conn device is destroyed. 96 */ 97 static int __match_tty(struct device *dev, void *data) 98 { 99 return !strncmp(dev_name(dev), "rfcomm", 6); 100 } 101 102 void hci_conn_init_sysfs(struct hci_conn *conn) 103 { 104 struct hci_dev *hdev = conn->hdev; 105 106 BT_DBG("conn %p", conn); 107 108 conn->dev.type = &bt_link; 109 conn->dev.class = bt_class; 110 conn->dev.parent = &hdev->dev; 111 112 device_initialize(&conn->dev); 113 } 114 115 void hci_conn_add_sysfs(struct hci_conn *conn) 116 { 117 struct hci_dev *hdev = conn->hdev; 118 119 BT_DBG("conn %p", conn); 120 121 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); 122 123 if (device_add(&conn->dev) < 0) { 124 BT_ERR("Failed to register connection device"); 125 return; 126 } 127 128 hci_dev_hold(hdev); 129 } 130 131 void hci_conn_del_sysfs(struct hci_conn *conn) 132 { 133 struct hci_dev *hdev = conn->hdev; 134 135 if (!device_is_registered(&conn->dev)) 136 return; 137 138 while (1) { 139 struct device *dev; 140 141 dev = device_find_child(&conn->dev, NULL, __match_tty); 142 if (!dev) 143 break; 144 device_move(dev, NULL, DPM_ORDER_DEV_LAST); 145 put_device(dev); 146 } 147 148 device_del(&conn->dev); 149 put_device(&conn->dev); 150 151 hci_dev_put(hdev); 152 } 153 154 static inline char *host_bustostr(int bus) 155 { 156 switch (bus) { 157 case HCI_VIRTUAL: 158 return "VIRTUAL"; 159 case HCI_USB: 160 return "USB"; 161 case HCI_PCCARD: 162 return "PCCARD"; 163 case HCI_UART: 164 return "UART"; 165 case HCI_RS232: 166 return "RS232"; 167 case HCI_PCI: 168 return "PCI"; 169 case HCI_SDIO: 170 return "SDIO"; 171 default: 172 return "UNKNOWN"; 173 } 174 } 175 176 static inline char *host_typetostr(int type) 177 { 178 switch (type) { 179 case HCI_BREDR: 180 return "BR/EDR"; 181 case HCI_AMP: 182 return "AMP"; 183 default: 184 return "UNKNOWN"; 185 } 186 } 187 188 static ssize_t show_bus(struct device *dev, 189 struct device_attribute *attr, char *buf) 190 { 191 struct hci_dev *hdev = to_hci_dev(dev); 192 return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); 193 } 194 195 static ssize_t show_type(struct device *dev, 196 struct device_attribute *attr, char *buf) 197 { 198 struct hci_dev *hdev = to_hci_dev(dev); 199 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); 200 } 201 202 static ssize_t show_name(struct device *dev, 203 struct device_attribute *attr, char *buf) 204 { 205 struct hci_dev *hdev = to_hci_dev(dev); 206 char name[HCI_MAX_NAME_LENGTH + 1]; 207 int i; 208 209 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++) 210 name[i] = hdev->dev_name[i]; 211 212 name[HCI_MAX_NAME_LENGTH] = '\0'; 213 return sprintf(buf, "%s\n", name); 214 } 215 216 static ssize_t show_class(struct device *dev, 217 struct device_attribute *attr, char *buf) 218 { 219 struct hci_dev *hdev = to_hci_dev(dev); 220 return sprintf(buf, "0x%.2x%.2x%.2x\n", hdev->dev_class[2], 221 hdev->dev_class[1], hdev->dev_class[0]); 222 } 223 224 static ssize_t show_address(struct device *dev, 225 struct device_attribute *attr, char *buf) 226 { 227 struct hci_dev *hdev = to_hci_dev(dev); 228 return sprintf(buf, "%pMR\n", &hdev->bdaddr); 229 } 230 231 static ssize_t show_features(struct device *dev, 232 struct device_attribute *attr, char *buf) 233 { 234 struct hci_dev *hdev = to_hci_dev(dev); 235 236 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 237 hdev->features[0], hdev->features[1], 238 hdev->features[2], hdev->features[3], 239 hdev->features[4], hdev->features[5], 240 hdev->features[6], hdev->features[7]); 241 } 242 243 static ssize_t show_manufacturer(struct device *dev, 244 struct device_attribute *attr, char *buf) 245 { 246 struct hci_dev *hdev = to_hci_dev(dev); 247 return sprintf(buf, "%d\n", hdev->manufacturer); 248 } 249 250 static ssize_t show_hci_version(struct device *dev, 251 struct device_attribute *attr, char *buf) 252 { 253 struct hci_dev *hdev = to_hci_dev(dev); 254 return sprintf(buf, "%d\n", hdev->hci_ver); 255 } 256 257 static ssize_t show_hci_revision(struct device *dev, 258 struct device_attribute *attr, char *buf) 259 { 260 struct hci_dev *hdev = to_hci_dev(dev); 261 return sprintf(buf, "%d\n", hdev->hci_rev); 262 } 263 264 static ssize_t show_idle_timeout(struct device *dev, 265 struct device_attribute *attr, char *buf) 266 { 267 struct hci_dev *hdev = to_hci_dev(dev); 268 return sprintf(buf, "%d\n", hdev->idle_timeout); 269 } 270 271 static ssize_t store_idle_timeout(struct device *dev, 272 struct device_attribute *attr, 273 const char *buf, size_t count) 274 { 275 struct hci_dev *hdev = to_hci_dev(dev); 276 unsigned int val; 277 int rv; 278 279 rv = kstrtouint(buf, 0, &val); 280 if (rv < 0) 281 return rv; 282 283 if (val != 0 && (val < 500 || val > 3600000)) 284 return -EINVAL; 285 286 hdev->idle_timeout = val; 287 288 return count; 289 } 290 291 static ssize_t show_sniff_max_interval(struct device *dev, 292 struct device_attribute *attr, char *buf) 293 { 294 struct hci_dev *hdev = to_hci_dev(dev); 295 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 296 } 297 298 static ssize_t store_sniff_max_interval(struct device *dev, 299 struct device_attribute *attr, 300 const char *buf, size_t count) 301 { 302 struct hci_dev *hdev = to_hci_dev(dev); 303 u16 val; 304 int rv; 305 306 rv = kstrtou16(buf, 0, &val); 307 if (rv < 0) 308 return rv; 309 310 if (val == 0 || val % 2 || val < hdev->sniff_min_interval) 311 return -EINVAL; 312 313 hdev->sniff_max_interval = val; 314 315 return count; 316 } 317 318 static ssize_t show_sniff_min_interval(struct device *dev, 319 struct device_attribute *attr, char *buf) 320 { 321 struct hci_dev *hdev = to_hci_dev(dev); 322 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 323 } 324 325 static ssize_t store_sniff_min_interval(struct device *dev, 326 struct device_attribute *attr, 327 const char *buf, size_t count) 328 { 329 struct hci_dev *hdev = to_hci_dev(dev); 330 u16 val; 331 int rv; 332 333 rv = kstrtou16(buf, 0, &val); 334 if (rv < 0) 335 return rv; 336 337 if (val == 0 || val % 2 || val > hdev->sniff_max_interval) 338 return -EINVAL; 339 340 hdev->sniff_min_interval = val; 341 342 return count; 343 } 344 345 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); 346 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 347 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 348 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 349 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 350 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 351 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 352 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 353 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 354 355 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 356 show_idle_timeout, store_idle_timeout); 357 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 358 show_sniff_max_interval, store_sniff_max_interval); 359 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 360 show_sniff_min_interval, store_sniff_min_interval); 361 362 static struct attribute *bt_host_attrs[] = { 363 &dev_attr_bus.attr, 364 &dev_attr_type.attr, 365 &dev_attr_name.attr, 366 &dev_attr_class.attr, 367 &dev_attr_address.attr, 368 &dev_attr_features.attr, 369 &dev_attr_manufacturer.attr, 370 &dev_attr_hci_version.attr, 371 &dev_attr_hci_revision.attr, 372 &dev_attr_idle_timeout.attr, 373 &dev_attr_sniff_max_interval.attr, 374 &dev_attr_sniff_min_interval.attr, 375 NULL 376 }; 377 378 static struct attribute_group bt_host_group = { 379 .attrs = bt_host_attrs, 380 }; 381 382 static const struct attribute_group *bt_host_groups[] = { 383 &bt_host_group, 384 NULL 385 }; 386 387 static void bt_host_release(struct device *dev) 388 { 389 struct hci_dev *hdev = to_hci_dev(dev); 390 kfree(hdev); 391 module_put(THIS_MODULE); 392 } 393 394 static struct device_type bt_host = { 395 .name = "host", 396 .groups = bt_host_groups, 397 .release = bt_host_release, 398 }; 399 400 static int inquiry_cache_show(struct seq_file *f, void *p) 401 { 402 struct hci_dev *hdev = f->private; 403 struct discovery_state *cache = &hdev->discovery; 404 struct inquiry_entry *e; 405 406 hci_dev_lock(hdev); 407 408 list_for_each_entry(e, &cache->all, all) { 409 struct inquiry_data *data = &e->data; 410 seq_printf(f, "%pMR %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", 411 &data->bdaddr, 412 data->pscan_rep_mode, data->pscan_period_mode, 413 data->pscan_mode, data->dev_class[2], 414 data->dev_class[1], data->dev_class[0], 415 __le16_to_cpu(data->clock_offset), 416 data->rssi, data->ssp_mode, e->timestamp); 417 } 418 419 hci_dev_unlock(hdev); 420 421 return 0; 422 } 423 424 static int inquiry_cache_open(struct inode *inode, struct file *file) 425 { 426 return single_open(file, inquiry_cache_show, inode->i_private); 427 } 428 429 static const struct file_operations inquiry_cache_fops = { 430 .open = inquiry_cache_open, 431 .read = seq_read, 432 .llseek = seq_lseek, 433 .release = single_release, 434 }; 435 436 static int blacklist_show(struct seq_file *f, void *p) 437 { 438 struct hci_dev *hdev = f->private; 439 struct bdaddr_list *b; 440 441 hci_dev_lock(hdev); 442 443 list_for_each_entry(b, &hdev->blacklist, list) 444 seq_printf(f, "%pMR\n", &b->bdaddr); 445 446 hci_dev_unlock(hdev); 447 448 return 0; 449 } 450 451 static int blacklist_open(struct inode *inode, struct file *file) 452 { 453 return single_open(file, blacklist_show, inode->i_private); 454 } 455 456 static const struct file_operations blacklist_fops = { 457 .open = blacklist_open, 458 .read = seq_read, 459 .llseek = seq_lseek, 460 .release = single_release, 461 }; 462 463 static void print_bt_uuid(struct seq_file *f, u8 *uuid) 464 { 465 u32 data0, data5; 466 u16 data1, data2, data3, data4; 467 468 data5 = get_unaligned_le32(uuid); 469 data4 = get_unaligned_le16(uuid + 4); 470 data3 = get_unaligned_le16(uuid + 6); 471 data2 = get_unaligned_le16(uuid + 8); 472 data1 = get_unaligned_le16(uuid + 10); 473 data0 = get_unaligned_le32(uuid + 12); 474 475 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.4x%.8x\n", 476 data0, data1, data2, data3, data4, 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