hci_sysfs.c revision 21061df3a2577b8d1feb1ca3cb51445085692e89
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 9#include <net/bluetooth/bluetooth.h> 10#include <net/bluetooth/hci_core.h> 11 12static struct class *bt_class; 13 14struct dentry *bt_debugfs; 15EXPORT_SYMBOL_GPL(bt_debugfs); 16 17static inline char *link_typetostr(int type) 18{ 19 switch (type) { 20 case ACL_LINK: 21 return "ACL"; 22 case SCO_LINK: 23 return "SCO"; 24 case ESCO_LINK: 25 return "eSCO"; 26 case LE_LINK: 27 return "LE"; 28 default: 29 return "UNKNOWN"; 30 } 31} 32 33static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf) 34{ 35 struct hci_conn *conn = dev_get_drvdata(dev); 36 return sprintf(buf, "%s\n", link_typetostr(conn->type)); 37} 38 39static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf) 40{ 41 struct hci_conn *conn = dev_get_drvdata(dev); 42 return sprintf(buf, "%s\n", batostr(&conn->dst)); 43} 44 45static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf) 46{ 47 struct hci_conn *conn = dev_get_drvdata(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) \ 57struct device_attribute link_attr_##_name = __ATTR(_name, _mode, _show, _store) 58 59static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); 60static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); 61static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); 62 63static struct attribute *bt_link_attrs[] = { 64 &link_attr_type.attr, 65 &link_attr_address.attr, 66 &link_attr_features.attr, 67 NULL 68}; 69 70static struct attribute_group bt_link_group = { 71 .attrs = bt_link_attrs, 72}; 73 74static const struct attribute_group *bt_link_groups[] = { 75 &bt_link_group, 76 NULL 77}; 78 79static void bt_link_release(struct device *dev) 80{ 81 void *data = dev_get_drvdata(dev); 82 kfree(data); 83} 84 85static struct device_type bt_link = { 86 .name = "link", 87 .groups = bt_link_groups, 88 .release = bt_link_release, 89}; 90 91static void add_conn(struct work_struct *work) 92{ 93 struct hci_conn *conn = container_of(work, struct hci_conn, work_add); 94 struct hci_dev *hdev = conn->hdev; 95 96 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); 97 98 dev_set_drvdata(&conn->dev, conn); 99 100 if (device_add(&conn->dev) < 0) { 101 BT_ERR("Failed to register connection device"); 102 return; 103 } 104 105 hci_dev_hold(hdev); 106} 107 108/* 109 * The rfcomm tty device will possibly retain even when conn 110 * is down, and sysfs doesn't support move zombie device, 111 * so we should move the device before conn device is destroyed. 112 */ 113static int __match_tty(struct device *dev, void *data) 114{ 115 return !strncmp(dev_name(dev), "rfcomm", 6); 116} 117 118static void del_conn(struct work_struct *work) 119{ 120 struct hci_conn *conn = container_of(work, struct hci_conn, work_del); 121 struct hci_dev *hdev = conn->hdev; 122 123 if (!device_is_registered(&conn->dev)) 124 return; 125 126 while (1) { 127 struct device *dev; 128 129 dev = device_find_child(&conn->dev, NULL, __match_tty); 130 if (!dev) 131 break; 132 device_move(dev, NULL, DPM_ORDER_DEV_LAST); 133 put_device(dev); 134 } 135 136 device_del(&conn->dev); 137 put_device(&conn->dev); 138 139 hci_dev_put(hdev); 140} 141 142void hci_conn_init_sysfs(struct hci_conn *conn) 143{ 144 struct hci_dev *hdev = conn->hdev; 145 146 BT_DBG("conn %p", conn); 147 148 conn->dev.type = &bt_link; 149 conn->dev.class = bt_class; 150 conn->dev.parent = &hdev->dev; 151 152 device_initialize(&conn->dev); 153 154 INIT_WORK(&conn->work_add, add_conn); 155 INIT_WORK(&conn->work_del, del_conn); 156} 157 158void hci_conn_add_sysfs(struct hci_conn *conn) 159{ 160 BT_DBG("conn %p", conn); 161 162 queue_work(conn->hdev->workqueue, &conn->work_add); 163} 164 165void hci_conn_del_sysfs(struct hci_conn *conn) 166{ 167 BT_DBG("conn %p", conn); 168 169 queue_work(conn->hdev->workqueue, &conn->work_del); 170} 171 172static inline char *host_bustostr(int bus) 173{ 174 switch (bus) { 175 case HCI_VIRTUAL: 176 return "VIRTUAL"; 177 case HCI_USB: 178 return "USB"; 179 case HCI_PCCARD: 180 return "PCCARD"; 181 case HCI_UART: 182 return "UART"; 183 case HCI_RS232: 184 return "RS232"; 185 case HCI_PCI: 186 return "PCI"; 187 case HCI_SDIO: 188 return "SDIO"; 189 default: 190 return "UNKNOWN"; 191 } 192} 193 194static inline char *host_typetostr(int type) 195{ 196 switch (type) { 197 case HCI_BREDR: 198 return "BR/EDR"; 199 case HCI_AMP: 200 return "AMP"; 201 default: 202 return "UNKNOWN"; 203 } 204} 205 206static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf) 207{ 208 struct hci_dev *hdev = dev_get_drvdata(dev); 209 return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); 210} 211 212static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) 213{ 214 struct hci_dev *hdev = dev_get_drvdata(dev); 215 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); 216} 217 218static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) 219{ 220 struct hci_dev *hdev = dev_get_drvdata(dev); 221 char name[HCI_MAX_NAME_LENGTH + 1]; 222 int i; 223 224 for (i = 0; i < HCI_MAX_NAME_LENGTH; i++) 225 name[i] = hdev->dev_name[i]; 226 227 name[HCI_MAX_NAME_LENGTH] = '\0'; 228 return sprintf(buf, "%s\n", name); 229} 230 231static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) 232{ 233 struct hci_dev *hdev = dev_get_drvdata(dev); 234 return sprintf(buf, "0x%.2x%.2x%.2x\n", 235 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); 236} 237 238static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) 239{ 240 struct hci_dev *hdev = dev_get_drvdata(dev); 241 return sprintf(buf, "%s\n", batostr(&hdev->bdaddr)); 242} 243 244static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) 245{ 246 struct hci_dev *hdev = dev_get_drvdata(dev); 247 248 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 249 hdev->features[0], hdev->features[1], 250 hdev->features[2], hdev->features[3], 251 hdev->features[4], hdev->features[5], 252 hdev->features[6], hdev->features[7]); 253} 254 255static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) 256{ 257 struct hci_dev *hdev = dev_get_drvdata(dev); 258 return sprintf(buf, "%d\n", hdev->manufacturer); 259} 260 261static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) 262{ 263 struct hci_dev *hdev = dev_get_drvdata(dev); 264 return sprintf(buf, "%d\n", hdev->hci_ver); 265} 266 267static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) 268{ 269 struct hci_dev *hdev = dev_get_drvdata(dev); 270 return sprintf(buf, "%d\n", hdev->hci_rev); 271} 272 273static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) 274{ 275 struct hci_dev *hdev = dev_get_drvdata(dev); 276 return sprintf(buf, "%d\n", hdev->idle_timeout); 277} 278 279static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 280{ 281 struct hci_dev *hdev = dev_get_drvdata(dev); 282 unsigned int val; 283 int rv; 284 285 rv = kstrtouint(buf, 0, &val); 286 if (rv < 0) 287 return rv; 288 289 if (val != 0 && (val < 500 || val > 3600000)) 290 return -EINVAL; 291 292 hdev->idle_timeout = val; 293 294 return count; 295} 296 297static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) 298{ 299 struct hci_dev *hdev = dev_get_drvdata(dev); 300 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 301} 302 303static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 304{ 305 struct hci_dev *hdev = dev_get_drvdata(dev); 306 u16 val; 307 int rv; 308 309 rv = kstrtou16(buf, 0, &val); 310 if (rv < 0) 311 return rv; 312 313 if (val == 0 || val % 2 || val < hdev->sniff_min_interval) 314 return -EINVAL; 315 316 hdev->sniff_max_interval = val; 317 318 return count; 319} 320 321static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) 322{ 323 struct hci_dev *hdev = dev_get_drvdata(dev); 324 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 325} 326 327static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 328{ 329 struct hci_dev *hdev = dev_get_drvdata(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 345static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); 346static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 347static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 348static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 349static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 350static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 351static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 352static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 353static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 354 355static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 356 show_idle_timeout, store_idle_timeout); 357static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 358 show_sniff_max_interval, store_sniff_max_interval); 359static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 360 show_sniff_min_interval, store_sniff_min_interval); 361 362static 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 378static struct attribute_group bt_host_group = { 379 .attrs = bt_host_attrs, 380}; 381 382static const struct attribute_group *bt_host_groups[] = { 383 &bt_host_group, 384 NULL 385}; 386 387static void bt_host_release(struct device *dev) 388{ 389 void *data = dev_get_drvdata(dev); 390 kfree(data); 391} 392 393static struct device_type bt_host = { 394 .name = "host", 395 .groups = bt_host_groups, 396 .release = bt_host_release, 397}; 398 399static int inquiry_cache_show(struct seq_file *f, void *p) 400{ 401 struct hci_dev *hdev = f->private; 402 struct inquiry_cache *cache = &hdev->inq_cache; 403 struct inquiry_entry *e; 404 405 hci_dev_lock_bh(hdev); 406 407 for (e = cache->list; e; e = e->next) { 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_bh(hdev); 419 420 return 0; 421} 422 423static int inquiry_cache_open(struct inode *inode, struct file *file) 424{ 425 return single_open(file, inquiry_cache_show, inode->i_private); 426} 427 428static 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 435static int blacklist_show(struct seq_file *f, void *p) 436{ 437 struct hci_dev *hdev = f->private; 438 struct list_head *l; 439 440 hci_dev_lock_bh(hdev); 441 442 list_for_each(l, &hdev->blacklist) { 443 struct bdaddr_list *b; 444 445 b = list_entry(l, struct bdaddr_list, list); 446 447 seq_printf(f, "%s\n", batostr(&b->bdaddr)); 448 } 449 450 hci_dev_unlock_bh(hdev); 451 452 return 0; 453} 454 455static int blacklist_open(struct inode *inode, struct file *file) 456{ 457 return single_open(file, blacklist_show, inode->i_private); 458} 459 460static const struct file_operations blacklist_fops = { 461 .open = blacklist_open, 462 .read = seq_read, 463 .llseek = seq_lseek, 464 .release = single_release, 465}; 466 467static void print_bt_uuid(struct seq_file *f, u8 *uuid) 468{ 469 u32 data0, data4; 470 u16 data1, data2, data3, data5; 471 472 memcpy(&data0, &uuid[0], 4); 473 memcpy(&data1, &uuid[4], 2); 474 memcpy(&data2, &uuid[6], 2); 475 memcpy(&data3, &uuid[8], 2); 476 memcpy(&data4, &uuid[10], 4); 477 memcpy(&data5, &uuid[14], 2); 478 479 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n", 480 ntohl(data0), ntohs(data1), ntohs(data2), 481 ntohs(data3), ntohl(data4), ntohs(data5)); 482} 483 484static int uuids_show(struct seq_file *f, void *p) 485{ 486 struct hci_dev *hdev = f->private; 487 struct list_head *l; 488 489 hci_dev_lock_bh(hdev); 490 491 list_for_each(l, &hdev->uuids) { 492 struct bt_uuid *uuid; 493 494 uuid = list_entry(l, struct bt_uuid, list); 495 496 print_bt_uuid(f, uuid->uuid); 497 } 498 499 hci_dev_unlock_bh(hdev); 500 501 return 0; 502} 503 504static int uuids_open(struct inode *inode, struct file *file) 505{ 506 return single_open(file, uuids_show, inode->i_private); 507} 508 509static const struct file_operations uuids_fops = { 510 .open = uuids_open, 511 .read = seq_read, 512 .llseek = seq_lseek, 513 .release = single_release, 514}; 515 516static int auto_accept_delay_set(void *data, u64 val) 517{ 518 struct hci_dev *hdev = data; 519 520 hci_dev_lock_bh(hdev); 521 522 hdev->auto_accept_delay = val; 523 524 hci_dev_unlock_bh(hdev); 525 526 return 0; 527} 528 529static int auto_accept_delay_get(void *data, u64 *val) 530{ 531 struct hci_dev *hdev = data; 532 533 hci_dev_lock_bh(hdev); 534 535 *val = hdev->auto_accept_delay; 536 537 hci_dev_unlock_bh(hdev); 538 539 return 0; 540} 541 542DEFINE_SIMPLE_ATTRIBUTE(auto_accept_delay_fops, auto_accept_delay_get, 543 auto_accept_delay_set, "%llu\n"); 544 545int hci_register_sysfs(struct hci_dev *hdev) 546{ 547 struct device *dev = &hdev->dev; 548 int err; 549 550 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 551 552 dev->type = &bt_host; 553 dev->class = bt_class; 554 dev->parent = hdev->parent; 555 556 dev_set_name(dev, "%s", hdev->name); 557 558 dev_set_drvdata(dev, hdev); 559 560 err = device_register(dev); 561 if (err < 0) 562 return err; 563 564 if (!bt_debugfs) 565 return 0; 566 567 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); 568 if (!hdev->debugfs) 569 return 0; 570 571 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, 572 hdev, &inquiry_cache_fops); 573 574 debugfs_create_file("blacklist", 0444, hdev->debugfs, 575 hdev, &blacklist_fops); 576 577 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops); 578 579 debugfs_create_file("auto_accept_delay", 0444, hdev->debugfs, hdev, 580 &auto_accept_delay_fops); 581 return 0; 582} 583 584void hci_unregister_sysfs(struct hci_dev *hdev) 585{ 586 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 587 588 debugfs_remove_recursive(hdev->debugfs); 589 590 device_del(&hdev->dev); 591} 592 593int __init bt_sysfs_init(void) 594{ 595 bt_debugfs = debugfs_create_dir("bluetooth", NULL); 596 597 bt_class = class_create(THIS_MODULE, "bluetooth"); 598 if (IS_ERR(bt_class)) 599 return PTR_ERR(bt_class); 600 601 return 0; 602} 603 604void bt_sysfs_cleanup(void) 605{ 606 class_destroy(bt_class); 607 608 debugfs_remove_recursive(bt_debugfs); 609} 610