hci_sysfs.c revision 930e13363fb0e94db6e8b59c54dfb5c59355113e
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 = NULL; 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 default: 27 return "UNKNOWN"; 28 } 29} 30 31static ssize_t show_link_type(struct device *dev, struct device_attribute *attr, char *buf) 32{ 33 struct hci_conn *conn = dev_get_drvdata(dev); 34 return sprintf(buf, "%s\n", link_typetostr(conn->type)); 35} 36 37static ssize_t show_link_address(struct device *dev, struct device_attribute *attr, char *buf) 38{ 39 struct hci_conn *conn = dev_get_drvdata(dev); 40 return sprintf(buf, "%s\n", batostr(&conn->dst)); 41} 42 43static ssize_t show_link_features(struct device *dev, struct device_attribute *attr, char *buf) 44{ 45 struct hci_conn *conn = dev_get_drvdata(dev); 46 47 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 48 conn->features[0], conn->features[1], 49 conn->features[2], conn->features[3], 50 conn->features[4], conn->features[5], 51 conn->features[6], conn->features[7]); 52} 53 54#define LINK_ATTR(_name,_mode,_show,_store) \ 55struct device_attribute link_attr_##_name = __ATTR(_name,_mode,_show,_store) 56 57static LINK_ATTR(type, S_IRUGO, show_link_type, NULL); 58static LINK_ATTR(address, S_IRUGO, show_link_address, NULL); 59static LINK_ATTR(features, S_IRUGO, show_link_features, NULL); 60 61static struct attribute *bt_link_attrs[] = { 62 &link_attr_type.attr, 63 &link_attr_address.attr, 64 &link_attr_features.attr, 65 NULL 66}; 67 68static struct attribute_group bt_link_group = { 69 .attrs = bt_link_attrs, 70}; 71 72static const struct attribute_group *bt_link_groups[] = { 73 &bt_link_group, 74 NULL 75}; 76 77static void bt_link_release(struct device *dev) 78{ 79 void *data = dev_get_drvdata(dev); 80 kfree(data); 81} 82 83static struct device_type bt_link = { 84 .name = "link", 85 .groups = bt_link_groups, 86 .release = bt_link_release, 87}; 88 89static void add_conn(struct work_struct *work) 90{ 91 struct hci_conn *conn = container_of(work, struct hci_conn, work_add); 92 struct hci_dev *hdev = conn->hdev; 93 94 dev_set_name(&conn->dev, "%s:%d", hdev->name, conn->handle); 95 96 dev_set_drvdata(&conn->dev, conn); 97 98 if (device_add(&conn->dev) < 0) { 99 BT_ERR("Failed to register connection device"); 100 return; 101 } 102 103 hci_dev_hold(hdev); 104} 105 106/* 107 * The rfcomm tty device will possibly retain even when conn 108 * is down, and sysfs doesn't support move zombie device, 109 * so we should move the device before conn device is destroyed. 110 */ 111static int __match_tty(struct device *dev, void *data) 112{ 113 return !strncmp(dev_name(dev), "rfcomm", 6); 114} 115 116static void del_conn(struct work_struct *work) 117{ 118 struct hci_conn *conn = container_of(work, struct hci_conn, work_del); 119 struct hci_dev *hdev = conn->hdev; 120 121 if (!device_is_registered(&conn->dev)) 122 return; 123 124 while (1) { 125 struct device *dev; 126 127 dev = device_find_child(&conn->dev, NULL, __match_tty); 128 if (!dev) 129 break; 130 device_move(dev, NULL, DPM_ORDER_DEV_LAST); 131 put_device(dev); 132 } 133 134 device_del(&conn->dev); 135 put_device(&conn->dev); 136 137 hci_dev_put(hdev); 138} 139 140void hci_conn_init_sysfs(struct hci_conn *conn) 141{ 142 struct hci_dev *hdev = conn->hdev; 143 144 BT_DBG("conn %p", conn); 145 146 conn->dev.type = &bt_link; 147 conn->dev.class = bt_class; 148 conn->dev.parent = &hdev->dev; 149 150 device_initialize(&conn->dev); 151 152 INIT_WORK(&conn->work_add, add_conn); 153 INIT_WORK(&conn->work_del, del_conn); 154} 155 156void hci_conn_add_sysfs(struct hci_conn *conn) 157{ 158 BT_DBG("conn %p", conn); 159 160 queue_work(conn->hdev->workqueue, &conn->work_add); 161} 162 163void hci_conn_del_sysfs(struct hci_conn *conn) 164{ 165 BT_DBG("conn %p", conn); 166 167 queue_work(conn->hdev->workqueue, &conn->work_del); 168} 169 170static inline char *host_bustostr(int bus) 171{ 172 switch (bus) { 173 case HCI_VIRTUAL: 174 return "VIRTUAL"; 175 case HCI_USB: 176 return "USB"; 177 case HCI_PCCARD: 178 return "PCCARD"; 179 case HCI_UART: 180 return "UART"; 181 case HCI_RS232: 182 return "RS232"; 183 case HCI_PCI: 184 return "PCI"; 185 case HCI_SDIO: 186 return "SDIO"; 187 default: 188 return "UNKNOWN"; 189 } 190} 191 192static inline char *host_typetostr(int type) 193{ 194 switch (type) { 195 case HCI_BREDR: 196 return "BR/EDR"; 197 case HCI_AMP: 198 return "AMP"; 199 default: 200 return "UNKNOWN"; 201 } 202} 203 204static ssize_t show_bus(struct device *dev, struct device_attribute *attr, char *buf) 205{ 206 struct hci_dev *hdev = dev_get_drvdata(dev); 207 return sprintf(buf, "%s\n", host_bustostr(hdev->bus)); 208} 209 210static ssize_t show_type(struct device *dev, struct device_attribute *attr, char *buf) 211{ 212 struct hci_dev *hdev = dev_get_drvdata(dev); 213 return sprintf(buf, "%s\n", host_typetostr(hdev->dev_type)); 214} 215 216static ssize_t show_name(struct device *dev, struct device_attribute *attr, char *buf) 217{ 218 struct hci_dev *hdev = dev_get_drvdata(dev); 219 char name[249]; 220 int i; 221 222 for (i = 0; i < 248; i++) 223 name[i] = hdev->dev_name[i]; 224 225 name[248] = '\0'; 226 return sprintf(buf, "%s\n", name); 227} 228 229static ssize_t show_class(struct device *dev, struct device_attribute *attr, char *buf) 230{ 231 struct hci_dev *hdev = dev_get_drvdata(dev); 232 return sprintf(buf, "0x%.2x%.2x%.2x\n", 233 hdev->dev_class[2], hdev->dev_class[1], hdev->dev_class[0]); 234} 235 236static ssize_t show_address(struct device *dev, struct device_attribute *attr, char *buf) 237{ 238 struct hci_dev *hdev = dev_get_drvdata(dev); 239 return sprintf(buf, "%s\n", batostr(&hdev->bdaddr)); 240} 241 242static ssize_t show_features(struct device *dev, struct device_attribute *attr, char *buf) 243{ 244 struct hci_dev *hdev = dev_get_drvdata(dev); 245 246 return sprintf(buf, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n", 247 hdev->features[0], hdev->features[1], 248 hdev->features[2], hdev->features[3], 249 hdev->features[4], hdev->features[5], 250 hdev->features[6], hdev->features[7]); 251} 252 253static ssize_t show_manufacturer(struct device *dev, struct device_attribute *attr, char *buf) 254{ 255 struct hci_dev *hdev = dev_get_drvdata(dev); 256 return sprintf(buf, "%d\n", hdev->manufacturer); 257} 258 259static ssize_t show_hci_version(struct device *dev, struct device_attribute *attr, char *buf) 260{ 261 struct hci_dev *hdev = dev_get_drvdata(dev); 262 return sprintf(buf, "%d\n", hdev->hci_ver); 263} 264 265static ssize_t show_hci_revision(struct device *dev, struct device_attribute *attr, char *buf) 266{ 267 struct hci_dev *hdev = dev_get_drvdata(dev); 268 return sprintf(buf, "%d\n", hdev->hci_rev); 269} 270 271static ssize_t show_idle_timeout(struct device *dev, struct device_attribute *attr, char *buf) 272{ 273 struct hci_dev *hdev = dev_get_drvdata(dev); 274 return sprintf(buf, "%d\n", hdev->idle_timeout); 275} 276 277static ssize_t store_idle_timeout(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 278{ 279 struct hci_dev *hdev = dev_get_drvdata(dev); 280 unsigned long val; 281 282 if (strict_strtoul(buf, 0, &val) < 0) 283 return -EINVAL; 284 285 if (val != 0 && (val < 500 || val > 3600000)) 286 return -EINVAL; 287 288 hdev->idle_timeout = val; 289 290 return count; 291} 292 293static ssize_t show_sniff_max_interval(struct device *dev, struct device_attribute *attr, char *buf) 294{ 295 struct hci_dev *hdev = dev_get_drvdata(dev); 296 return sprintf(buf, "%d\n", hdev->sniff_max_interval); 297} 298 299static ssize_t store_sniff_max_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 300{ 301 struct hci_dev *hdev = dev_get_drvdata(dev); 302 unsigned long val; 303 304 if (strict_strtoul(buf, 0, &val) < 0) 305 return -EINVAL; 306 307 if (val < 0x0002 || val > 0xFFFE || val % 2) 308 return -EINVAL; 309 310 if (val < hdev->sniff_min_interval) 311 return -EINVAL; 312 313 hdev->sniff_max_interval = val; 314 315 return count; 316} 317 318static ssize_t show_sniff_min_interval(struct device *dev, struct device_attribute *attr, char *buf) 319{ 320 struct hci_dev *hdev = dev_get_drvdata(dev); 321 return sprintf(buf, "%d\n", hdev->sniff_min_interval); 322} 323 324static ssize_t store_sniff_min_interval(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) 325{ 326 struct hci_dev *hdev = dev_get_drvdata(dev); 327 unsigned long val; 328 329 if (strict_strtoul(buf, 0, &val) < 0) 330 return -EINVAL; 331 332 if (val < 0x0002 || val > 0xFFFE || val % 2) 333 return -EINVAL; 334 335 if (val > hdev->sniff_max_interval) 336 return -EINVAL; 337 338 hdev->sniff_min_interval = val; 339 340 return count; 341} 342 343static DEVICE_ATTR(bus, S_IRUGO, show_bus, NULL); 344static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); 345static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); 346static DEVICE_ATTR(class, S_IRUGO, show_class, NULL); 347static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); 348static DEVICE_ATTR(features, S_IRUGO, show_features, NULL); 349static DEVICE_ATTR(manufacturer, S_IRUGO, show_manufacturer, NULL); 350static DEVICE_ATTR(hci_version, S_IRUGO, show_hci_version, NULL); 351static DEVICE_ATTR(hci_revision, S_IRUGO, show_hci_revision, NULL); 352 353static DEVICE_ATTR(idle_timeout, S_IRUGO | S_IWUSR, 354 show_idle_timeout, store_idle_timeout); 355static DEVICE_ATTR(sniff_max_interval, S_IRUGO | S_IWUSR, 356 show_sniff_max_interval, store_sniff_max_interval); 357static DEVICE_ATTR(sniff_min_interval, S_IRUGO | S_IWUSR, 358 show_sniff_min_interval, store_sniff_min_interval); 359 360static struct attribute *bt_host_attrs[] = { 361 &dev_attr_bus.attr, 362 &dev_attr_type.attr, 363 &dev_attr_name.attr, 364 &dev_attr_class.attr, 365 &dev_attr_address.attr, 366 &dev_attr_features.attr, 367 &dev_attr_manufacturer.attr, 368 &dev_attr_hci_version.attr, 369 &dev_attr_hci_revision.attr, 370 &dev_attr_idle_timeout.attr, 371 &dev_attr_sniff_max_interval.attr, 372 &dev_attr_sniff_min_interval.attr, 373 NULL 374}; 375 376static struct attribute_group bt_host_group = { 377 .attrs = bt_host_attrs, 378}; 379 380static const struct attribute_group *bt_host_groups[] = { 381 &bt_host_group, 382 NULL 383}; 384 385static void bt_host_release(struct device *dev) 386{ 387 void *data = dev_get_drvdata(dev); 388 kfree(data); 389} 390 391static struct device_type bt_host = { 392 .name = "host", 393 .groups = bt_host_groups, 394 .release = bt_host_release, 395}; 396 397static int inquiry_cache_show(struct seq_file *f, void *p) 398{ 399 struct hci_dev *hdev = f->private; 400 struct inquiry_cache *cache = &hdev->inq_cache; 401 struct inquiry_entry *e; 402 403 hci_dev_lock_bh(hdev); 404 405 for (e = cache->list; e; e = e->next) { 406 struct inquiry_data *data = &e->data; 407 seq_printf(f, "%s %d %d %d 0x%.2x%.2x%.2x 0x%.4x %d %d %u\n", 408 batostr(&data->bdaddr), 409 data->pscan_rep_mode, data->pscan_period_mode, 410 data->pscan_mode, data->dev_class[2], 411 data->dev_class[1], data->dev_class[0], 412 __le16_to_cpu(data->clock_offset), 413 data->rssi, data->ssp_mode, e->timestamp); 414 } 415 416 hci_dev_unlock_bh(hdev); 417 418 return 0; 419} 420 421static int inquiry_cache_open(struct inode *inode, struct file *file) 422{ 423 return single_open(file, inquiry_cache_show, inode->i_private); 424} 425 426static const struct file_operations inquiry_cache_fops = { 427 .open = inquiry_cache_open, 428 .read = seq_read, 429 .llseek = seq_lseek, 430 .release = single_release, 431}; 432 433static int blacklist_show(struct seq_file *f, void *p) 434{ 435 struct hci_dev *hdev = f->private; 436 struct list_head *l; 437 438 hci_dev_lock_bh(hdev); 439 440 list_for_each(l, &hdev->blacklist) { 441 struct bdaddr_list *b; 442 443 b = list_entry(l, struct bdaddr_list, list); 444 445 seq_printf(f, "%s\n", batostr(&b->bdaddr)); 446 } 447 448 hci_dev_unlock_bh(hdev); 449 450 return 0; 451} 452 453static int blacklist_open(struct inode *inode, struct file *file) 454{ 455 return single_open(file, blacklist_show, inode->i_private); 456} 457 458static const struct file_operations blacklist_fops = { 459 .open = blacklist_open, 460 .read = seq_read, 461 .llseek = seq_lseek, 462 .release = single_release, 463}; 464 465static void print_bt_uuid(struct seq_file *f, u8 *uuid) 466{ 467 u32 data0, data4; 468 u16 data1, data2, data3, data5; 469 470 memcpy(&data0, &uuid[0], 4); 471 memcpy(&data1, &uuid[4], 2); 472 memcpy(&data2, &uuid[6], 2); 473 memcpy(&data3, &uuid[8], 2); 474 memcpy(&data4, &uuid[10], 4); 475 memcpy(&data5, &uuid[14], 2); 476 477 seq_printf(f, "%.8x-%.4x-%.4x-%.4x-%.8x%.4x\n", 478 ntohl(data0), ntohs(data1), ntohs(data2), 479 ntohs(data3), ntohl(data4), ntohs(data5)); 480} 481 482static int uuids_show(struct seq_file *f, void *p) 483{ 484 struct hci_dev *hdev = f->private; 485 struct list_head *l; 486 487 hci_dev_lock_bh(hdev); 488 489 list_for_each(l, &hdev->uuids) { 490 struct bt_uuid *uuid; 491 492 uuid = list_entry(l, struct bt_uuid, list); 493 494 print_bt_uuid(f, uuid->uuid); 495 } 496 497 hci_dev_unlock_bh(hdev); 498 499 return 0; 500} 501 502static int uuids_open(struct inode *inode, struct file *file) 503{ 504 return single_open(file, uuids_show, inode->i_private); 505} 506 507static const struct file_operations uuids_fops = { 508 .open = uuids_open, 509 .read = seq_read, 510 .llseek = seq_lseek, 511 .release = single_release, 512}; 513 514int hci_register_sysfs(struct hci_dev *hdev) 515{ 516 struct device *dev = &hdev->dev; 517 int err; 518 519 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 520 521 dev->type = &bt_host; 522 dev->class = bt_class; 523 dev->parent = hdev->parent; 524 525 dev_set_name(dev, "%s", hdev->name); 526 527 dev_set_drvdata(dev, hdev); 528 529 err = device_register(dev); 530 if (err < 0) 531 return err; 532 533 if (!bt_debugfs) 534 return 0; 535 536 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); 537 if (!hdev->debugfs) 538 return 0; 539 540 debugfs_create_file("inquiry_cache", 0444, hdev->debugfs, 541 hdev, &inquiry_cache_fops); 542 543 debugfs_create_file("blacklist", 0444, hdev->debugfs, 544 hdev, &blacklist_fops); 545 546 debugfs_create_file("uuids", 0444, hdev->debugfs, hdev, &uuids_fops); 547 548 return 0; 549} 550 551void hci_unregister_sysfs(struct hci_dev *hdev) 552{ 553 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); 554 555 debugfs_remove_recursive(hdev->debugfs); 556 557 device_del(&hdev->dev); 558} 559 560int __init bt_sysfs_init(void) 561{ 562 bt_debugfs = debugfs_create_dir("bluetooth", NULL); 563 564 bt_class = class_create(THIS_MODULE, "bluetooth"); 565 if (IS_ERR(bt_class)) 566 return PTR_ERR(bt_class); 567 568 return 0; 569} 570 571void bt_sysfs_cleanup(void) 572{ 573 class_destroy(bt_class); 574 575 debugfs_remove_recursive(bt_debugfs); 576} 577