1 /* Bluetooth HCI driver model support. */ 2 3 #include <linux/kernel.h> 4 #include <linux/slab.h> 5 #include <linux/init.h> 6 #include <linux/debugfs.h> 7 #include <linux/seq_file.h> 8 #include <linux/module.h> 9 10 #include <net/bluetooth/bluetooth.h> 11 #include <net/bluetooth/hci_core.h> 12 13 static struct class *bt_class; 14 15 struct dentry *bt_debugfs; 16 EXPORT_SYMBOL_GPL(bt_debugfs); 17 18 static inline char *link_typetostr(int type) 19 { 20 switch (type) { 21 case ACL_LINK: 22 return "ACL"; 23 case SCO_LINK: 24 return "SCO"; 25 case ESCO_LINK: 26 return "eSCO"; 27 case LE_LINK: 28 return "LE"; 29 default: 30 return "UNKNOWN"; 31 } 32 } 33 34 static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf) 35 { 36 struct hci_conn *conn = to_hci_conn(dev); 37 return sprintf(buf, "%s\n", link_typetostr(conn->type)); 38 } 39 40 static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf) 41 { 42 struct hci_conn *conn = to_hci_conn(dev); 43 return sprintf(buf, "%s\n", batostr(&conn->dst)); 44 } 45 46 static ssize_t show_link_features(struct device *dev, 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, 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, struct device_attribute *attr, char *buf) 195 { 196 struct hci_dev *hdev = to_hci_dev(dev); 197 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); 198 } 199 200 static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) 201 { 202 struct hci_dev *hdev = to_hci_dev(dev); 203 char name[HCI_MAX_NAME_LENGTH + 1]; 204 int i; 205 206 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++) 207 name[i] = hdev->dev_name[i]; 208 209 name[HCI_MAX_NAME_LENGTH] = '\0'; 210 return sprintf(buf, "%s\n", name); 211 } 212 213 static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) 214 { 215 struct hci_dev *hdev = to_hci_dev(dev); 216 return sprintf(buf, "0x%.2x%.2x%.2x\n", 217 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); 218 } 219 220 static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) 221 { 222 struct hci_dev *hdev = to_hci_dev(dev); 223 return sprintf(buf, "%s\n", batostr(&hdev->bdaddr)); 224 } 225 226 static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) 227 { 228 struct hci_dev *hdev = to_hci_dev(dev); 229 230 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 231 hdev->features[0], hdev->features[1], 232 hdev->features[2], hdev->features[3], 233 hdev->features[4], hdev->features[5], 234 hdev->features[6], hdev->features[7]); 235 } 236 237 static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) 238 { 239 struct hci_dev *hdev = to_hci_dev(dev); 240 return sprintf(buf, "%d\n", hdev->manufacturer); 241 } 242 243 static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) 244 { 245 struct hci_dev *hdev = to_hci_dev(dev); 246 return sprintf(buf, "%d\n", hdev->hci_ver); 247 } 248 249 static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) 250 { 251 struct hci_dev *hdev = to_hci_dev(dev); 252 return sprintf(buf, "%d\n", hdev->hci_rev); 253 } 254 255 static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) 256 { 257 struct hci_dev *hdev = to_hci_dev(dev); 258 return sprintf(buf, "%d\n", hdev->idle_timeout); 259 } 260 261 static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 262 { 263 struct hci_dev *hdev = to_hci_dev(dev); 264 unsigned int val; 265 int rv; 266 267 rv = kstrtouint(buf, 0, &val); 268 if (rv < 0) 269 return rv; 270 271 if (val != 0 && (val < 500 || val > 3600000)) 272 return -EINVAL; 273 274 hdev->idle_timeout = val; 275 276 return count; 277 } 278 279 static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) 280 { 281 struct hci_dev *hdev = to_hci_dev(dev); 282 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 283 } 284 285 static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 286 { 287 struct hci_dev *hdev = to_hci_dev(dev); 288 u16 val; 289 int rv; 290 291 rv = kstrtou16(buf, 0, &val); 292 if (rv < 0) 293 return rv; 294 295 if (val == 0 || val % 2 || val < hdev->sniff_min_interval) 296 return -EINVAL; 297 298 hdev->sniff_max_interval = val; 299 300 return count; 301 } 302 303 static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) 304 { 305 struct hci_dev *hdev = to_hci_dev(dev); 306 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 307 } 308 309 static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 310 { 311 struct hci_dev *hdev = to_hci_dev(dev); 312 u16 val; 313 int rv; 314 315 rv = kstrtou16(buf, 0, &val); 316 if (rv < 0) 317 return rv; 318 319 if (val == 0 || val % 2 || val > hdev->sniff_max_interval) 320 return -EINVAL; 321 322 hdev->sniff_min_interval = val; 323 324 return count; 325 } 326 327 static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); 328 static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 329 static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 330 static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 331 static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 332 static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 333 static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 334 static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 335 static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 336 337 static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 338 show_idle_timeout, store_idle_timeout); 339 static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 340 show_sniff_max_interval, store_sniff_max_interval); 341 static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 342 show_sniff_min_interval, store_sniff_min_interval); 343 344 static struct attribute *bt_host_attrs[] = { 345 &dev_attr_bus.attr, 346 &dev_attr_type.attr, 347 &dev_attr_name.attr, 348 &dev_attr_class.attr, 349 &dev_attr_address.attr, 350 &dev_attr_features.attr, 351 &dev_attr_manufacturer.attr, 352 &dev_attr_hci_version.attr, 353 &dev_attr_hci_revision.attr, 354 &dev_attr_idle_timeout.attr, 355 &dev_attr_sniff_max_interval.attr, 356 &dev_attr_sniff_min_interval.attr, 357 NULL 358 }; 359 360 static struct attribute_group bt_host_group = { 361 .attrs = bt_host_attrs, 362 }; 363 364 static const struct attribute_group *bt_host_groups[] = { 365 &bt_host_group, 366 NULL 367 }; 368 369 static void bt_host_release(struct device *dev) 370 { 371 struct hci_dev *hdev = to_hci_dev(dev); 372 kfree(hdev); 373 module_put(THIS_MODULE); 374 } 375 376 static struct device_type bt_host = { 377 .name = "host", 378 .groups = bt_host_groups, 379 .release = bt_host_release, 380 }; 381 382 static int inquiry_cache_show(struct seq_file *f, void *p) 383 { 384 struct hci_dev *hdev = f->private; 385 struct discovery_state *cache = &hdev->discovery; 386 struct inquiry_entry *e; 387 388 hci_dev_lock(hdev); 389 390 list_for_each_entry(e, &cache->all, all) { 391 struct inquiry_data *data = &e->data; 392 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", 393 batostr(&data->bdaddr), 394 data->pscan_rep_mode, data->pscan_period_mode, 395 data->pscan_mode, data->dev_class[2], 396 data->dev_class[1], data->dev_class[0], 397 __le16_to_cpu(data->clock_offset), 398 data->rssi, data->ssp_mode, e->timestamp); 399 } 400 401 hci_dev_unlock(hdev); 402 403 return 0; 404 } 405 406 static int inquiry_cache_open(struct inode *inode, struct file *file) 407 { 408 return single_open(file, inquiry_cache_show, inode->i_private); 409 } 410 411 static const struct file_operations inquiry_cache_fops = { 412 .open = inquiry_cache_open, 413 .read = seq_read, 414 .llseek = seq_lseek, 415 .release = single_release, 416 }; 417 418 static int blacklist_show(struct seq_file *f, void *p) 419 { 420 struct hci_dev *hdev = f->private; 421 struct bdaddr_list *b; 422 423 hci_dev_lock(hdev); 424 425 list_for_each_entry(b, &hdev->blacklist, list) 426 seq_printf(f, "%s\n", batostr(&b->bdaddr)); 427 428 hci_dev_unlock(hdev); 429 430 return 0; 431 } 432 433 static int blacklist_open(struct inode *inode, struct file *file) 434 { 435 return single_open(file, blacklist_show, inode->i_private); 436 } 437 438 static const struct file_operations blacklist_fops = { 439 .open = blacklist_open, 440 .read = seq_read, 441 .llseek = seq_lseek, 442 .release = single_release, 443 }; 444 445 static void print_bt_uuid(struct seq_file *f, u8 *uuid) 446 { 447 u32 data0, data4; 448 u16 data1, data2, data3, data5; 449 450 memcpy(&data0, &uuid[0], 4); 451 memcpy(&data1, &uuid[4], 2); 452 memcpy(&data2, &uuid[6], 2); 453 memcpy(&data3, &uuid[8], 2); 454 memcpy(&data4, &uuid[10], 4); 455 memcpy(&data5, &uuid[14], 2); 456 457 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n", 458 ntohl(data0), ntohs(data1), ntohs(data2), 459 ntohs(data3), ntohl(data4), ntohs(data5)); 460 } 461 462 static int uuids_show(struct seq_file *f, void *p) 463 { 464 struct hci_dev *hdev = f->private; 465 struct bt_uuid *uuid; 466 467 hci_dev_lock(hdev); 468 469 list_for_each_entry(uuid, &hdev->uuids, list) 470 print_bt_uuid(f, uuid->uuid); 471 472 hci_dev_unlock(hdev); 473 474 return 0; 475 } 476 477 static int uuids_open(struct inode *inode, struct file *file) 478 { 479 return single_open(file, uuids_show, inode->i_private); 480 } 481 482 static const struct file_operations uuids_fops = { 483 .open = uuids_open, 484 .read = seq_read, 485 .llseek = seq_lseek, 486 .release = single_release, 487 }; 488 489 static int auto_accept_delay_set(void *data, u64 val) 490 { 491 struct hci_dev *hdev = data; 492 493 hci_dev_lock(hdev); 494 495 hdev->auto_accept_delay = val; 496 497 hci_dev_unlock(hdev); 498 499 return 0; 500 } 501 502 static int auto_accept_delay_get(void *data, u64 *val) 503 { 504 struct hci_dev *hdev = data; 505 506 hci_dev_lock(hdev); 507 508 *val = hdev->auto_accept_delay; 509 510 hci_dev_unlock(hdev); 511 512 return 0; 513 } 514 515 DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get, 516 auto_accept_delay_set, "%llu\n"); 517 518 void hci_init_sysfs(struct hci_dev *hdev) 519 { 520 struct device *dev = &hdev->dev; 521 522 dev->type = &bt_host; 523 dev->class = bt_class; 524 525 __module_get(THIS_MODULE); 526 device_initialize(dev); 527 } 528 529 int hci_add_sysfs(struct hci_dev *hdev) 530 { 531 struct device *dev = &hdev->dev; 532 int err; 533 534 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 535 536 dev->parent = hdev->parent; 537 dev_set_name(dev, "%s", hdev->name); 538 539 err = device_add(dev); 540 if (err < 0) 541 return err; 542 543 if (!bt_debugfs) 544 return 0; 545 546 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); 547 if (!hdev->debugfs) 548 return 0; 549 550 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, 551 hdev, &inquiry_cache_fops); 552 553 debugfs_create_file("blacklist", 0444, hdev->debugfs, 554 hdev, &blacklist_fops); 555 556 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops); 557 558 debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev, 559 &auto_accept_delay_fops); 560 return 0; 561 } 562 563 void hci_del_sysfs(struct hci_dev *hdev) 564 { 565 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 566 567 debugfs_remove_recursive(hdev->debugfs); 568 569 device_del(&hdev->dev); 570 } 571 572 int __init bt_sysfs_init(void) 573 { 574 bt_debugfs = debugfs_create_dir("bluetooth", NULL); 575 576 bt_class = class_create(THIS_MODULE, "bluetooth"); 577 if (IS_ERR(bt_class)) 578 return PTR_ERR(bt_class); 579 580 return 0; 581 } 582 583 void bt_sysfs_cleanup(void) 584 { 585 class_destroy(bt_class); 586 587 debugfs_remove_recursive(bt_debugfs); 588 } 589