net/bluetooth/hci_core.c

   1 /*
   2    BlueZ - Bluetooth protocol stack for Linux
   3    Copyright (C) 2000-2001 Qualcomm Incorporated
   4    Copyright (C) 2011 ProFUSION Embedded Systems
   5
   6    Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License version 2 as
  10    published by the Free Software Foundation;
  11
  12    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  13    OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  14    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
  15    IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
  16    CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
  17    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  18    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  19    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  20
  21    ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
  22    COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
  23    SOFTWARE IS DISCLAIMED.
  24 */
  25
  26 /* Bluetooth HCI core. */
  27
  28 #include <linux/export.h>
  29 #include <linux/rfkill.h>
  30 #include <linux/debugfs.h>
  31 #include <linux/crypto.h>
  32 #include <linux/kcov.h>
  33 #include <linux/property.h>
  34 #include <linux/suspend.h>
  35 #include <linux/wait.h>
  36 #include <asm/unaligned.h>
  37
  38 #include <net/bluetooth/bluetooth.h>
  39 #include <net/bluetooth/hci_core.h>
  40 #include <net/bluetooth/l2cap.h>
  41 #include <net/bluetooth/mgmt.h>
  42
  43 #include "hci_request.h"
  44 #include "hci_debugfs.h"
  45 #include "smp.h"
  46 #include "leds.h"
  47 #include "msft.h"
  48 #include "aosp.h"
  49 #include "hci_codec.h"
  50
  51 static void hci_rx_work(struct work_struct *work);
  52 static void hci_cmd_work(struct work_struct *work);
  53 static void hci_tx_work(struct work_struct *work);
  54
  55 /* HCI device list */
  56 LIST_HEAD(hci_dev_list);
  57 DEFINE_RWLOCK(hci_dev_list_lock);
  58
  59 /* HCI callback list */
  60 LIST_HEAD(hci_cb_list);
  61 DEFINE_MUTEX(hci_cb_list_lock);
  62
  63 /* HCI ID Numbering */
  64 static DEFINE_IDA(hci_index_ida);
  65
  66 static int hci_scan_req(struct hci_request *req, unsigned long opt)
  67 {
  68         __u8 scan = opt;
  69
  70         BT_DBG("%s %x", req->hdev->name, scan);
  71
  72         /* Inquiry and Page scans */
  73         hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
  74         return 0;
  75 }
  76
  77 static int hci_auth_req(struct hci_request *req, unsigned long opt)
  78 {
  79         __u8 auth = opt;
  80
  81         BT_DBG("%s %x", req->hdev->name, auth);
  82
  83         /* Authentication */
  84         hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
  85         return 0;
  86 }
  87
  88 static int hci_encrypt_req(struct hci_request *req, unsigned long opt)
  89 {
  90         __u8 encrypt = opt;
  91
  92         BT_DBG("%s %x", req->hdev->name, encrypt);
  93
  94         /* Encryption */
  95         hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
  96         return 0;
  97 }
  98
  99 static int hci_linkpol_req(struct hci_request *req, unsigned long opt)
 100 {
 101         __le16 policy = cpu_to_le16(opt);
 102
 103         BT_DBG("%s %x", req->hdev->name, policy);
 104
 105         /* Default link policy */
 106         hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
 107         return 0;
 108 }
 109
 110 /* Get HCI device by index.
 111  * Device is held on return. */
 112 struct hci_dev *hci_dev_get(int index)
 113 {
 114         struct hci_dev *hdev = NULL, *d;
 115
 116         BT_DBG("%d", index);
 117
 118         if (index < 0)
 119                 return NULL;
 120
 121         read_lock(&hci_dev_list_lock);
 122         list_for_each_entry(d, &hci_dev_list, list) {
 123                 if (d->id == index) {
 124                         hdev = hci_dev_hold(d);
 125                         break;
 126                 }
 127         }
 128         read_unlock(&hci_dev_list_lock);
 129         return hdev;
 130 }
 131
 132 /* ---- Inquiry support ---- */
 133
 134 bool hci_discovery_active(struct hci_dev *hdev)
 135 {
 136         struct discovery_state *discov = &hdev->discovery;
 137
 138         switch (discov->state) {
 139         case DISCOVERY_FINDING:
 140         case DISCOVERY_RESOLVING:
 141                 return true;
 142
 143         default:
 144                 return false;
 145         }
 146 }
 147
 148 void hci_discovery_set_state(struct hci_dev *hdev, int state)
 149 {
 150         int old_state = hdev->discovery.state;
 151
 152         BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
 153
 154         if (old_state == state)
 155                 return;
 156
 157         hdev->discovery.state = state;
 158
 159         switch (state) {
 160         case DISCOVERY_STOPPED:
 161                 hci_update_passive_scan(hdev);
 162
 163                 if (old_state != DISCOVERY_STARTING)
 164                         mgmt_discovering(hdev, 0);
 165                 break;
 166         case DISCOVERY_STARTING:
 167                 break;
 168         case DISCOVERY_FINDING:
 169                 mgmt_discovering(hdev, 1);
 170                 break;
 171         case DISCOVERY_RESOLVING:
 172                 break;
 173         case DISCOVERY_STOPPING:
 174                 break;
 175         }
 176 }
 177
 178 void hci_inquiry_cache_flush(struct hci_dev *hdev)
 179 {
 180         struct discovery_state *cache = &hdev->discovery;
 181         struct inquiry_entry *p, *n;
 182
 183         list_for_each_entry_safe(p, n, &cache->all, all) {
 184                 list_del(&p->all);
 185                 kfree(p);
 186         }
 187
 188         INIT_LIST_HEAD(&cache->unknown);
 189         INIT_LIST_HEAD(&cache->resolve);
 190 }
 191
 192 struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
 193                                                bdaddr_t *bdaddr)
 194 {
 195         struct discovery_state *cache = &hdev->discovery;
 196         struct inquiry_entry *e;
 197
 198         BT_DBG("cache %p, %pMR", cache, bdaddr);
 199
 200         list_for_each_entry(e, &cache->all, all) {
 201                 if (!bacmp(&e->data.bdaddr, bdaddr))
 202                         return e;
 203         }
 204
 205         return NULL;
 206 }
 207
 208 struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
 209                                                        bdaddr_t *bdaddr)
 210 {
 211         struct discovery_state *cache = &hdev->discovery;
 212         struct inquiry_entry *e;
 213
 214         BT_DBG("cache %p, %pMR", cache, bdaddr);
 215
 216         list_for_each_entry(e, &cache->unknown, list) {
 217                 if (!bacmp(&e->data.bdaddr, bdaddr))
 218                         return e;
 219         }
 220
 221         return NULL;
 222 }
 223
 224 struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
 225                                                        bdaddr_t *bdaddr,
 226                                                        int state)
 227 {
 228         struct discovery_state *cache = &hdev->discovery;
 229         struct inquiry_entry *e;
 230
 231         BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state);
 232
 233         list_for_each_entry(e, &cache->resolve, list) {
 234                 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
 235                         return e;
 236                 if (!bacmp(&e->data.bdaddr, bdaddr))
 237                         return e;
 238         }
 239
 240         return NULL;
 241 }
 242
 243 void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
 244                                       struct inquiry_entry *ie)
 245 {
 246         struct discovery_state *cache = &hdev->discovery;
 247         struct list_head *pos = &cache->resolve;
 248         struct inquiry_entry *p;
 249
 250         list_del(&ie->list);
 251
 252         list_for_each_entry(p, &cache->resolve, list) {
 253                 if (p->name_state != NAME_PENDING &&
 254                     abs(p->data.rssi) >= abs(ie->data.rssi))
 255                         break;
 256                 pos = &p->list;
 257         }
 258
 259         list_add(&ie->list, pos);
 260 }
 261
 262 u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
 263                              bool name_known)
 264 {
 265         struct discovery_state *cache = &hdev->discovery;
 266         struct inquiry_entry *ie;
 267         u32 flags = 0;
 268
 269         BT_DBG("cache %p, %pMR", cache, &data->bdaddr);
 270
 271         hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
 272
 273         if (!data->ssp_mode)
 274                 flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
 275
 276         ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
 277         if (ie) {
 278                 if (!ie->data.ssp_mode)
 279                         flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
 280
 281                 if (ie->name_state == NAME_NEEDED &&
 282                     data->rssi != ie->data.rssi) {
 283                         ie->data.rssi = data->rssi;
 284                         hci_inquiry_cache_update_resolve(hdev, ie);
 285                 }
 286
 287                 goto update;
 288         }
 289
 290         /* Entry not in the cache. Add new one. */
 291         ie = kzalloc(sizeof(*ie), GFP_KERNEL);
 292         if (!ie) {
 293                 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
 294                 goto done;
 295         }
 296
 297         list_add(&ie->all, &cache->all);
 298
 299         if (name_known) {
 300                 ie->name_state = NAME_KNOWN;
 301         } else {
 302                 ie->name_state = NAME_NOT_KNOWN;
 303                 list_add(&ie->list, &cache->unknown);
 304         }
 305
 306 update:
 307         if (name_known && ie->name_state != NAME_KNOWN &&
 308             ie->name_state != NAME_PENDING) {
 309                 ie->name_state = NAME_KNOWN;
 310                 list_del(&ie->list);
 311         }
 312
 313         memcpy(&ie->data, data, sizeof(*data));
 314         ie->timestamp = jiffies;
 315         cache->timestamp = jiffies;
 316
 317         if (ie->name_state == NAME_NOT_KNOWN)
 318                 flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
 319
 320 done:
 321         return flags;
 322 }
 323
 324 static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
 325 {
 326         struct discovery_state *cache = &hdev->discovery;
 327         struct inquiry_info *info = (struct inquiry_info *) buf;
 328         struct inquiry_entry *e;
 329         int copied = 0;
 330
 331         list_for_each_entry(e, &cache->all, all) {
 332                 struct inquiry_data *data = &e->data;
 333
 334                 if (copied >= num)
 335                         break;
 336
 337                 bacpy(&info->bdaddr, &data->bdaddr);
 338                 info->pscan_rep_mode    = data->pscan_rep_mode;
 339                 info->pscan_period_mode = data->pscan_period_mode;
 340                 info->pscan_mode        = data->pscan_mode;
 341                 memcpy(info->dev_class, data->dev_class, 3);
 342                 info->clock_offset      = data->clock_offset;
 343
 344                 info++;
 345                 copied++;
 346         }
 347
 348         BT_DBG("cache %p, copied %d", cache, copied);
 349         return copied;
 350 }
 351
 352 static int hci_inq_req(struct hci_request *req, unsigned long opt)
 353 {
 354         struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
 355         struct hci_dev *hdev = req->hdev;
 356         struct hci_cp_inquiry cp;
 357
 358         BT_DBG("%s", hdev->name);
 359
 360         if (test_bit(HCI_INQUIRY, &hdev->flags))
 361                 return 0;
 362
 363         /* Start Inquiry */
 364         memcpy(&cp.lap, &ir->lap, 3);
 365         cp.length  = ir->length;
 366         cp.num_rsp = ir->num_rsp;
 367         hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp);
 368
 369         return 0;
 370 }
 371
 372 int hci_inquiry(void __user *arg)
 373 {
 374         __u8 __user *ptr = arg;
 375         struct hci_inquiry_req ir;
 376         struct hci_dev *hdev;
 377         int err = 0, do_inquiry = 0, max_rsp;
 378         long timeo;
 379         __u8 *buf;
 380
 381         if (copy_from_user(&ir, ptr, sizeof(ir)))
 382                 return -EFAULT;
 383
 384         hdev = hci_dev_get(ir.dev_id);
 385         if (!hdev)
 386                 return -ENODEV;
 387
 388         if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
 389                 err = -EBUSY;
 390                 goto done;
 391         }
 392
 393         if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
 394                 err = -EOPNOTSUPP;
 395                 goto done;
 396         }
 397
 398         if (hdev->dev_type != HCI_PRIMARY) {
 399                 err = -EOPNOTSUPP;
 400                 goto done;
 401         }
 402
 403         if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
 404                 err = -EOPNOTSUPP;
 405                 goto done;
 406         }
 407
 408         /* Restrict maximum inquiry length to 60 seconds */
 409         if (ir.length > 60) {
 410                 err = -EINVAL;
 411                 goto done;
 412         }
 413
 414         hci_dev_lock(hdev);
 415         if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
 416             inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
 417                 hci_inquiry_cache_flush(hdev);
 418                 do_inquiry = 1;
 419         }
 420         hci_dev_unlock(hdev);
 421
 422         timeo = ir.length * msecs_to_jiffies(2000);
 423
 424         if (do_inquiry) {
 425                 err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir,
 426                                    timeo, NULL);
 427                 if (err < 0)
 428                         goto done;
 429
 430                 /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is
 431                  * cleared). If it is interrupted by a signal, return -EINTR.
 432                  */
 433                 if (wait_on_bit(&hdev->flags, HCI_INQUIRY,
 434                                 TASK_INTERRUPTIBLE)) {
 435                         err = -EINTR;
 436                         goto done;
 437                 }
 438         }
 439
 440         /* for unlimited number of responses we will use buffer with
 441          * 255 entries
 442          */
 443         max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
 444
 445         /* cache_dump can't sleep. Therefore we allocate temp buffer and then
 446          * copy it to the user space.
 447          */
 448         buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL);
 449         if (!buf) {
 450                 err = -ENOMEM;
 451                 goto done;
 452         }
 453
 454         hci_dev_lock(hdev);
 455         ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
 456         hci_dev_unlock(hdev);
 457
 458         BT_DBG("num_rsp %d", ir.num_rsp);
 459
 460         if (!copy_to_user(ptr, &ir, sizeof(ir))) {
 461                 ptr += sizeof(ir);
 462                 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
 463                                  ir.num_rsp))
 464                         err = -EFAULT;
 465         } else
 466                 err = -EFAULT;
 467
 468         kfree(buf);
 469
 470 done:
 471         hci_dev_put(hdev);
 472         return err;
 473 }
 474
 475 static int hci_dev_do_open(struct hci_dev *hdev)
 476 {
 477         int ret = 0;
 478
 479         BT_DBG("%s %p", hdev->name, hdev);
 480
 481         hci_req_sync_lock(hdev);
 482
 483         ret = hci_dev_open_sync(hdev);
 484
 485         hci_req_sync_unlock(hdev);
 486         return ret;
 487 }
 488
 489 /* ---- HCI ioctl helpers ---- */
 490
 491 int hci_dev_open(__u16 dev)
 492 {
 493         struct hci_dev *hdev;
 494         int err;
 495
 496         hdev = hci_dev_get(dev);
 497         if (!hdev)
 498                 return -ENODEV;
 499
 500         /* Devices that are marked as unconfigured can only be powered
 501          * up as user channel. Trying to bring them up as normal devices
 502          * will result into a failure. Only user channel operation is
 503          * possible.
 504          *
 505          * When this function is called for a user channel, the flag
 506          * HCI_USER_CHANNEL will be set first before attempting to
 507          * open the device.
 508          */
 509         if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
 510             !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
 511                 err = -EOPNOTSUPP;
 512                 goto done;
 513         }
 514
 515         /* We need to ensure that no other power on/off work is pending
 516          * before proceeding to call hci_dev_do_open. This is
 517          * particularly important if the setup procedure has not yet
 518          * completed.
 519          */
 520         if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
 521                 cancel_delayed_work(&hdev->power_off);
 522
 523         /* After this call it is guaranteed that the setup procedure
 524          * has finished. This means that error conditions like RFKILL
 525          * or no valid public or static random address apply.
 526          */
 527         flush_workqueue(hdev->req_workqueue);
 528
 529         /* For controllers not using the management interface and that
 530          * are brought up using legacy ioctl, set the HCI_BONDABLE bit
 531          * so that pairing works for them. Once the management interface
 532          * is in use this bit will be cleared again and userspace has
 533          * to explicitly enable it.
 534          */
 535         if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
 536             !hci_dev_test_flag(hdev, HCI_MGMT))
 537                 hci_dev_set_flag(hdev, HCI_BONDABLE);
 538
 539         err = hci_dev_do_open(hdev);
 540
 541 done:
 542         hci_dev_put(hdev);
 543         return err;
 544 }
 545
 546 int hci_dev_do_close(struct hci_dev *hdev)
 547 {
 548         int err;
 549
 550         BT_DBG("%s %p", hdev->name, hdev);
 551
 552         hci_req_sync_lock(hdev);
 553
 554         err = hci_dev_close_sync(hdev);
 555
 556         hci_req_sync_unlock(hdev);
 557
 558         return err;
 559 }
 560
 561 int hci_dev_close(__u16 dev)
 562 {
 563         struct hci_dev *hdev;
 564         int err;
 565
 566         hdev = hci_dev_get(dev);
 567         if (!hdev)
 568                 return -ENODEV;
 569
 570         if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
 571                 err = -EBUSY;
 572                 goto done;
 573         }
 574
 575         cancel_work_sync(&hdev->power_on);
 576         if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF))
 577                 cancel_delayed_work(&hdev->power_off);
 578
 579         err = hci_dev_do_close(hdev);
 580
 581 done:
 582         hci_dev_put(hdev);
 583         return err;
 584 }
 585
 586 static int hci_dev_do_reset(struct hci_dev *hdev)
 587 {
 588         int ret;
 589
 590         BT_DBG("%s %p", hdev->name, hdev);
 591
 592         hci_req_sync_lock(hdev);
 593
 594         /* Drop queues */
 595         skb_queue_purge(&hdev->rx_q);
 596         skb_queue_purge(&hdev->cmd_q);
 597
 598         /* Cancel these to avoid queueing non-chained pending work */
 599         hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
 600         /* Wait for
 601          *
 602          *    if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
 603          *        queue_delayed_work(&hdev->{cmd,ncmd}_timer)
 604          *
 605          * inside RCU section to see the flag or complete scheduling.
 606          */
 607         synchronize_rcu();
 608         /* Explicitly cancel works in case scheduled after setting the flag. */
 609         cancel_delayed_work(&hdev->cmd_timer);
 610         cancel_delayed_work(&hdev->ncmd_timer);
 611
 612         /* Avoid potential lockdep warnings from the *_flush() calls by
 613          * ensuring the workqueue is empty up front.
 614          */
 615         drain_workqueue(hdev->workqueue);
 616
 617         hci_dev_lock(hdev);
 618         hci_inquiry_cache_flush(hdev);
 619         hci_conn_hash_flush(hdev);
 620         hci_dev_unlock(hdev);
 621
 622         if (hdev->flush)
 623                 hdev->flush(hdev);
 624
 625         hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE);
 626
 627         atomic_set(&hdev->cmd_cnt, 1);
 628         hdev->acl_cnt = 0;
 629         hdev->sco_cnt = 0;
 630         hdev->le_cnt = 0;
 631         hdev->iso_cnt = 0;
 632
 633         ret = hci_reset_sync(hdev);
 634
 635         hci_req_sync_unlock(hdev);
 636         return ret;
 637 }
 638
 639 int hci_dev_reset(__u16 dev)
 640 {
 641         struct hci_dev *hdev;
 642         int err;
 643
 644         hdev = hci_dev_get(dev);
 645         if (!hdev)
 646                 return -ENODEV;
 647
 648         if (!test_bit(HCI_UP, &hdev->flags)) {
 649                 err = -ENETDOWN;
 650                 goto done;
 651         }
 652
 653         if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
 654                 err = -EBUSY;
 655                 goto done;
 656         }
 657
 658         if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
 659                 err = -EOPNOTSUPP;
 660                 goto done;
 661         }
 662
 663         err = hci_dev_do_reset(hdev);
 664
 665 done:
 666         hci_dev_put(hdev);
 667         return err;
 668 }
 669
 670 int hci_dev_reset_stat(__u16 dev)
 671 {
 672         struct hci_dev *hdev;
 673         int ret = 0;
 674
 675         hdev = hci_dev_get(dev);
 676         if (!hdev)
 677                 return -ENODEV;
 678
 679         if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
 680                 ret = -EBUSY;
 681                 goto done;
 682         }
 683
 684         if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
 685                 ret = -EOPNOTSUPP;
 686                 goto done;
 687         }
 688
 689         memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
 690
 691 done:
 692         hci_dev_put(hdev);
 693         return ret;
 694 }
 695
 696 static void hci_update_passive_scan_state(struct hci_dev *hdev, u8 scan)
 697 {
 698         bool conn_changed, discov_changed;
 699
 700         BT_DBG("%s scan 0x%02x", hdev->name, scan);
 701
 702         if ((scan & SCAN_PAGE))
 703                 conn_changed = !hci_dev_test_and_set_flag(hdev,
 704                                                           HCI_CONNECTABLE);
 705         else
 706                 conn_changed = hci_dev_test_and_clear_flag(hdev,
 707                                                            HCI_CONNECTABLE);
 708
 709         if ((scan & SCAN_INQUIRY)) {
 710                 discov_changed = !hci_dev_test_and_set_flag(hdev,
 711                                                             HCI_DISCOVERABLE);
 712         } else {
 713                 hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE);
 714                 discov_changed = hci_dev_test_and_clear_flag(hdev,
 715                                                              HCI_DISCOVERABLE);
 716         }
 717
 718         if (!hci_dev_test_flag(hdev, HCI_MGMT))
 719                 return;
 720
 721         if (conn_changed || discov_changed) {
 722                 /* In case this was disabled through mgmt */
 723                 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
 724
 725                 if (hci_dev_test_flag(hdev, HCI_LE_ENABLED))
 726                         hci_update_adv_data(hdev, hdev->cur_adv_instance);
 727
 728                 mgmt_new_settings(hdev);
 729         }
 730 }
 731
 732 int hci_dev_cmd(unsigned int cmd, void __user *arg)
 733 {
 734         struct hci_dev *hdev;
 735         struct hci_dev_req dr;
 736         int err = 0;
 737
 738         if (copy_from_user(&dr, arg, sizeof(dr)))
 739                 return -EFAULT;
 740
 741         hdev = hci_dev_get(dr.dev_id);
 742         if (!hdev)
 743                 return -ENODEV;
 744
 745         if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
 746                 err = -EBUSY;
 747                 goto done;
 748         }
 749
 750         if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
 751                 err = -EOPNOTSUPP;
 752                 goto done;
 753         }
 754
 755         if (hdev->dev_type != HCI_PRIMARY) {
 756                 err = -EOPNOTSUPP;
 757                 goto done;
 758         }
 759
 760         if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
 761                 err = -EOPNOTSUPP;
 762                 goto done;
 763         }
 764
 765         switch (cmd) {
 766         case HCISETAUTH:
 767                 err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
 768                                    HCI_INIT_TIMEOUT, NULL);
 769                 break;
 770
 771         case HCISETENCRYPT:
 772                 if (!lmp_encrypt_capable(hdev)) {
 773                         err = -EOPNOTSUPP;
 774                         break;
 775                 }
 776
 777                 if (!test_bit(HCI_AUTH, &hdev->flags)) {
 778                         /* Auth must be enabled first */
 779                         err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt,
 780                                            HCI_INIT_TIMEOUT, NULL);
 781                         if (err)
 782                                 break;
 783                 }
 784
 785                 err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt,
 786                                    HCI_INIT_TIMEOUT, NULL);
 787                 break;
 788
 789         case HCISETSCAN:
 790                 err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt,
 791                                    HCI_INIT_TIMEOUT, NULL);
 792
 793                 /* Ensure that the connectable and discoverable states
 794                  * get correctly modified as this was a non-mgmt change.
 795                  */
 796                 if (!err)
 797                         hci_update_passive_scan_state(hdev, dr.dev_opt);
 798                 break;
 799
 800         case HCISETLINKPOL:
 801                 err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt,
 802                                    HCI_INIT_TIMEOUT, NULL);
 803                 break;
 804
 805         case HCISETLINKMODE:
 806                 hdev->link_mode = ((__u16) dr.dev_opt) &
 807                                         (HCI_LM_MASTER | HCI_LM_ACCEPT);
 808                 break;
 809
 810         case HCISETPTYPE:
 811                 if (hdev->pkt_type == (__u16) dr.dev_opt)
 812                         break;
 813
 814                 hdev->pkt_type = (__u16) dr.dev_opt;
 815                 mgmt_phy_configuration_changed(hdev, NULL);
 816                 break;
 817
 818         case HCISETACLMTU:
 819                 hdev->acl_mtu  = *((__u16 *) &dr.dev_opt + 1);
 820                 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
 821                 break;
 822
 823         case HCISETSCOMTU:
 824                 hdev->sco_mtu  = *((__u16 *) &dr.dev_opt + 1);
 825                 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
 826                 break;
 827
 828         default:
 829                 err = -EINVAL;
 830                 break;
 831         }
 832
 833 done:
 834         hci_dev_put(hdev);
 835         return err;
 836 }
 837
 838 int hci_get_dev_list(void __user *arg)
 839 {
 840         struct hci_dev *hdev;
 841         struct hci_dev_list_req *dl;
 842         struct hci_dev_req *dr;
 843         int n = 0, size, err;
 844         __u16 dev_num;
 845
 846         if (get_user(dev_num, (__u16 __user *) arg))
 847                 return -EFAULT;
 848
 849         if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
 850                 return -EINVAL;
 851
 852         size = sizeof(*dl) + dev_num * sizeof(*dr);
 853
 854         dl = kzalloc(size, GFP_KERNEL);
 855         if (!dl)
 856                 return -ENOMEM;
 857
 858         dr = dl->dev_req;
 859
 860         read_lock(&hci_dev_list_lock);
 861         list_for_each_entry(hdev, &hci_dev_list, list) {
 862                 unsigned long flags = hdev->flags;
 863
 864                 /* When the auto-off is configured it means the transport
 865                  * is running, but in that case still indicate that the
 866                  * device is actually down.
 867                  */
 868                 if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
 869                         flags &= ~BIT(HCI_UP);
 870
 871                 (dr + n)->dev_id  = hdev->id;
 872                 (dr + n)->dev_opt = flags;
 873
 874                 if (++n >= dev_num)
 875                         break;
 876         }
 877         read_unlock(&hci_dev_list_lock);
 878
 879         dl->dev_num = n;
 880         size = sizeof(*dl) + n * sizeof(*dr);
 881
 882         err = copy_to_user(arg, dl, size);
 883         kfree(dl);
 884
 885         return err ? -EFAULT : 0;
 886 }
 887
 888 int hci_get_dev_info(void __user *arg)
 889 {
 890         struct hci_dev *hdev;
 891         struct hci_dev_info di;
 892         unsigned long flags;
 893         int err = 0;
 894
 895         if (copy_from_user(&di, arg, sizeof(di)))
 896                 return -EFAULT;
 897
 898         hdev = hci_dev_get(di.dev_id);
 899         if (!hdev)
 900                 return -ENODEV;
 901
 902         /* When the auto-off is configured it means the transport
 903          * is running, but in that case still indicate that the
 904          * device is actually down.
 905          */
 906         if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
 907                 flags = hdev->flags & ~BIT(HCI_UP);
 908         else
 909                 flags = hdev->flags;
 910
 911         strcpy(di.name, hdev->name);
 912         di.bdaddr   = hdev->bdaddr;
 913         di.type     = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4);
 914         di.flags    = flags;
 915         di.pkt_type = hdev->pkt_type;
 916         if (lmp_bredr_capable(hdev)) {
 917                 di.acl_mtu  = hdev->acl_mtu;
 918                 di.acl_pkts = hdev->acl_pkts;
 919                 di.sco_mtu  = hdev->sco_mtu;
 920                 di.sco_pkts = hdev->sco_pkts;
 921         } else {
 922                 di.acl_mtu  = hdev->le_mtu;
 923                 di.acl_pkts = hdev->le_pkts;
 924                 di.sco_mtu  = 0;
 925                 di.sco_pkts = 0;
 926         }
 927         di.link_policy = hdev->link_policy;
 928         di.link_mode   = hdev->link_mode;
 929
 930         memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
 931         memcpy(&di.features, &hdev->features, sizeof(di.features));
 932
 933         if (copy_to_user(arg, &di, sizeof(di)))
 934                 err = -EFAULT;
 935
 936         hci_dev_put(hdev);
 937
 938         return err;
 939 }
 940
 941 /* ---- Interface to HCI drivers ---- */
 942
 943 static int hci_rfkill_set_block(void *data, bool blocked)
 944 {
 945         struct hci_dev *hdev = data;
 946
 947         BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
 948
 949         if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
 950                 return -EBUSY;
 951
 952         if (blocked) {
 953                 hci_dev_set_flag(hdev, HCI_RFKILLED);
 954                 if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
 955                     !hci_dev_test_flag(hdev, HCI_CONFIG))
 956                         hci_dev_do_close(hdev);
 957         } else {
 958                 hci_dev_clear_flag(hdev, HCI_RFKILLED);
 959         }
 960
 961         return 0;
 962 }
 963
 964 static const struct rfkill_ops hci_rfkill_ops = {
 965         .set_block = hci_rfkill_set_block,
 966 };
 967
 968 static void hci_power_on(struct work_struct *work)
 969 {
 970         struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
 971         int err;
 972
 973         BT_DBG("%s", hdev->name);
 974
 975         if (test_bit(HCI_UP, &hdev->flags) &&
 976             hci_dev_test_flag(hdev, HCI_MGMT) &&
 977             hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
 978                 cancel_delayed_work(&hdev->power_off);
 979                 err = hci_powered_update_sync(hdev);
 980                 mgmt_power_on(hdev, err);
 981                 return;
 982         }
 983
 984         err = hci_dev_do_open(hdev);
 985         if (err < 0) {
 986                 hci_dev_lock(hdev);
 987                 mgmt_set_powered_failed(hdev, err);
 988                 hci_dev_unlock(hdev);
 989                 return;
 990         }
 991
 992         /* During the HCI setup phase, a few error conditions are
 993          * ignored and they need to be checked now. If they are still
 994          * valid, it is important to turn the device back off.
 995          */
 996         if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
 997             hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
 998             (hdev->dev_type == HCI_PRIMARY &&
 999              !bacmp(&hdev->bdaddr, BDADDR_ANY) &&
1000              !bacmp(&hdev->static_addr, BDADDR_ANY))) {
1001                 hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
1002                 hci_dev_do_close(hdev);
1003         } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
1004                 queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
1005                                    HCI_AUTO_OFF_TIMEOUT);
1006         }
1007
1008         if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
1009                 /* For unconfigured devices, set the HCI_RAW flag
1010                  * so that userspace can easily identify them.
1011                  */
1012                 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1013                         set_bit(HCI_RAW, &hdev->flags);
1014
1015                 /* For fully configured devices, this will send
1016                  * the Index Added event. For unconfigured devices,
1017                  * it will send Unconfigued Index Added event.
1018                  *
1019                  * Devices with HCI_QUIRK_RAW_DEVICE are ignored
1020                  * and no event will be send.
1021                  */
1022                 mgmt_index_added(hdev);
1023         } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
1024                 /* When the controller is now configured, then it
1025                  * is important to clear the HCI_RAW flag.
1026                  */
1027                 if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
1028                         clear_bit(HCI_RAW, &hdev->flags);
1029
1030                 /* Powering on the controller with HCI_CONFIG set only
1031                  * happens with the transition from unconfigured to
1032                  * configured. This will send the Index Added event.
1033                  */
1034                 mgmt_index_added(hdev);
1035         }
1036 }
1037
1038 static void hci_power_off(struct work_struct *work)
1039 {
1040         struct hci_dev *hdev = container_of(work, struct hci_dev,
1041                                             power_off.work);
1042
1043         BT_DBG("%s", hdev->name);
1044
1045         hci_dev_do_close(hdev);
1046 }
1047
1048 static void hci_error_reset(struct work_struct *work)
1049 {
1050         struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
1051
1052         BT_DBG("%s", hdev->name);
1053
1054         if (hdev->hw_error)
1055                 hdev->hw_error(hdev, hdev->hw_error_code);
1056         else
1057                 bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code);
1058
1059         if (hci_dev_do_close(hdev))
1060                 return;
1061
1062         hci_dev_do_open(hdev);
1063 }
1064
1065 void hci_uuids_clear(struct hci_dev *hdev)
1066 {
1067         struct bt_uuid *uuid, *tmp;
1068
1069         list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
1070                 list_del(&uuid->list);
1071                 kfree(uuid);
1072         }
1073 }
1074
1075 void hci_link_keys_clear(struct hci_dev *hdev)
1076 {
1077         struct link_key *key;
1078
1079         list_for_each_entry(key, &hdev->link_keys, list) {
1080                 list_del_rcu(&key->list);
1081                 kfree_rcu(key, rcu);
1082         }
1083 }
1084
1085 void hci_smp_ltks_clear(struct hci_dev *hdev)
1086 {
1087         struct smp_ltk *k;
1088
1089         list_for_each_entry(k, &hdev->long_term_keys, list) {
1090                 list_del_rcu(&k->list);
1091                 kfree_rcu(k, rcu);
1092         }
1093 }
1094
1095 void hci_smp_irks_clear(struct hci_dev *hdev)
1096 {
1097         struct smp_irk *k;
1098
1099         list_for_each_entry(k, &hdev->identity_resolving_keys, list) {
1100                 list_del_rcu(&k->list);
1101                 kfree_rcu(k, rcu);
1102         }
1103 }
1104
1105 void hci_blocked_keys_clear(struct hci_dev *hdev)
1106 {
1107         struct blocked_key *b;
1108
1109         list_for_each_entry(b, &hdev->blocked_keys, list) {
1110                 list_del_rcu(&b->list);
1111                 kfree_rcu(b, rcu);
1112         }
1113 }
1114
1115 bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16])
1116 {
1117         bool blocked = false;
1118         struct blocked_key *b;
1119
1120         rcu_read_lock();
1121         list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
1122                 if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) {
1123                         blocked = true;
1124                         break;
1125                 }
1126         }
1127
1128         rcu_read_unlock();
1129         return blocked;
1130 }
1131
1132 struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1133 {
1134         struct link_key *k;
1135
1136         rcu_read_lock();
1137         list_for_each_entry_rcu(k, &hdev->link_keys, list) {
1138                 if (bacmp(bdaddr, &k->bdaddr) == 0) {
1139                         rcu_read_unlock();
1140
1141                         if (hci_is_blocked_key(hdev,
1142                                                HCI_BLOCKED_KEY_TYPE_LINKKEY,
1143                                                k->val)) {
1144                                 bt_dev_warn_ratelimited(hdev,
1145                                                         "Link key blocked for %pMR",
1146                                                         &k->bdaddr);
1147                                 return NULL;
1148                         }
1149
1150                         return k;
1151                 }
1152         }
1153         rcu_read_unlock();
1154
1155         return NULL;
1156 }
1157
1158 static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
1159                                u8 key_type, u8 old_key_type)
1160 {
1161         /* Legacy key */
1162         if (key_type < 0x03)
1163                 return true;
1164
1165         /* Debug keys are insecure so don't store them persistently */
1166         if (key_type == HCI_LK_DEBUG_COMBINATION)
1167                 return false;
1168
1169         /* Changed combination key and there's no previous one */
1170         if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
1171                 return false;
1172
1173         /* Security mode 3 case */
1174         if (!conn)
1175                 return true;
1176
1177         /* BR/EDR key derived using SC from an LE link */
1178         if (conn->type == LE_LINK)
1179                 return true;
1180
1181         /* Neither local nor remote side had no-bonding as requirement */
1182         if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
1183                 return true;
1184
1185         /* Local side had dedicated bonding as requirement */
1186         if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
1187                 return true;
1188
1189         /* Remote side had dedicated bonding as requirement */
1190         if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
1191                 return true;
1192
1193         /* If none of the above criteria match, then don't store the key
1194          * persistently */
1195         return false;
1196 }
1197
1198 static u8 ltk_role(u8 type)
1199 {
1200         if (type == SMP_LTK)
1201                 return HCI_ROLE_MASTER;
1202
1203         return HCI_ROLE_SLAVE;
1204 }
1205
1206 struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1207                              u8 addr_type, u8 role)
1208 {
1209         struct smp_ltk *k;
1210
1211         rcu_read_lock();
1212         list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1213                 if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr))
1214                         continue;
1215
1216                 if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) {
1217                         rcu_read_unlock();
1218
1219                         if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK,
1220                                                k->val)) {
1221                                 bt_dev_warn_ratelimited(hdev,
1222                                                         "LTK blocked for %pMR",
1223                                                         &k->bdaddr);
1224                                 return NULL;
1225                         }
1226
1227                         return k;
1228                 }
1229         }
1230         rcu_read_unlock();
1231
1232         return NULL;
1233 }
1234
1235 struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa)
1236 {
1237         struct smp_irk *irk_to_return = NULL;
1238         struct smp_irk *irk;
1239
1240         rcu_read_lock();
1241         list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1242                 if (!bacmp(&irk->rpa, rpa)) {
1243                         irk_to_return = irk;
1244                         goto done;
1245                 }
1246         }
1247
1248         list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1249                 if (smp_irk_matches(hdev, irk->val, rpa)) {
1250                         bacpy(&irk->rpa, rpa);
1251                         irk_to_return = irk;
1252                         goto done;
1253                 }
1254         }
1255
1256 done:
1257         if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1258                                                 irk_to_return->val)) {
1259                 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1260                                         &irk_to_return->bdaddr);
1261                 irk_to_return = NULL;
1262         }
1263
1264         rcu_read_unlock();
1265
1266         return irk_to_return;
1267 }
1268
1269 struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
1270                                      u8 addr_type)
1271 {
1272         struct smp_irk *irk_to_return = NULL;
1273         struct smp_irk *irk;
1274
1275         /* Identity Address must be public or static random */
1276         if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0)
1277                 return NULL;
1278
1279         rcu_read_lock();
1280         list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) {
1281                 if (addr_type == irk->addr_type &&
1282                     bacmp(bdaddr, &irk->bdaddr) == 0) {
1283                         irk_to_return = irk;
1284                         goto done;
1285                 }
1286         }
1287
1288 done:
1289
1290         if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK,
1291                                                 irk_to_return->val)) {
1292                 bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR",
1293                                         &irk_to_return->bdaddr);
1294                 irk_to_return = NULL;
1295         }
1296
1297         rcu_read_unlock();
1298
1299         return irk_to_return;
1300 }
1301
1302 struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn,
1303                                   bdaddr_t *bdaddr, u8 *val, u8 type,
1304                                   u8 pin_len, bool *persistent)
1305 {
1306         struct link_key *key, *old_key;
1307         u8 old_key_type;
1308
1309         old_key = hci_find_link_key(hdev, bdaddr);
1310         if (old_key) {
1311                 old_key_type = old_key->type;
1312                 key = old_key;
1313         } else {
1314                 old_key_type = conn ? conn->key_type : 0xff;
1315                 key = kzalloc(sizeof(*key), GFP_KERNEL);
1316                 if (!key)
1317                         return NULL;
1318                 list_add_rcu(&key->list, &hdev->link_keys);
1319         }
1320
1321         BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type);
1322
1323         /* Some buggy controller combinations generate a changed
1324          * combination key for legacy pairing even when there's no
1325          * previous key */
1326         if (type == HCI_LK_CHANGED_COMBINATION &&
1327             (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) {
1328                 type = HCI_LK_COMBINATION;
1329                 if (conn)
1330                         conn->key_type = type;
1331         }
1332
1333         bacpy(&key->bdaddr, bdaddr);
1334         memcpy(key->val, val, HCI_LINK_KEY_SIZE);
1335         key->pin_len = pin_len;
1336
1337         if (type == HCI_LK_CHANGED_COMBINATION)
1338                 key->type = old_key_type;
1339         else
1340                 key->type = type;
1341
1342         if (persistent)
1343                 *persistent = hci_persistent_key(hdev, conn, type,
1344                                                  old_key_type);
1345
1346         return key;
1347 }
1348
1349 struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1350                             u8 addr_type, u8 type, u8 authenticated,
1351                             u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand)
1352 {
1353         struct smp_ltk *key, *old_key;
1354         u8 role = ltk_role(type);
1355
1356         old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
1357         if (old_key)
1358                 key = old_key;
1359         else {
1360                 key = kzalloc(sizeof(*key), GFP_KERNEL);
1361                 if (!key)
1362                         return NULL;
1363                 list_add_rcu(&key->list, &hdev->long_term_keys);
1364         }
1365
1366         bacpy(&key->bdaddr, bdaddr);
1367         key->bdaddr_type = addr_type;
1368         memcpy(key->val, tk, sizeof(key->val));
1369         key->authenticated = authenticated;
1370         key->ediv = ediv;
1371         key->rand = rand;
1372         key->enc_size = enc_size;
1373         key->type = type;
1374
1375         return key;
1376 }
1377
1378 struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
1379                             u8 addr_type, u8 val[16], bdaddr_t *rpa)
1380 {
1381         struct smp_irk *irk;
1382
1383         irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
1384         if (!irk) {
1385                 irk = kzalloc(sizeof(*irk), GFP_KERNEL);
1386                 if (!irk)
1387                         return NULL;
1388
1389                 bacpy(&irk->bdaddr, bdaddr);
1390                 irk->addr_type = addr_type;
1391
1392                 list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
1393         }
1394
1395         memcpy(irk->val, val, 16);
1396         bacpy(&irk->rpa, rpa);
1397
1398         return irk;
1399 }
1400
1401 int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1402 {
1403         struct link_key *key;
1404
1405         key = hci_find_link_key(hdev, bdaddr);
1406         if (!key)
1407                 return -ENOENT;
1408
1409         BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1410
1411         list_del_rcu(&key->list);
1412         kfree_rcu(key, rcu);
1413
1414         return 0;
1415 }
1416
1417 int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
1418 {
1419         struct smp_ltk *k, *tmp;
1420         int removed = 0;
1421
1422         list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1423                 if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
1424                         continue;
1425
1426                 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1427
1428                 list_del_rcu(&k->list);
1429                 kfree_rcu(k, rcu);
1430                 removed++;
1431         }
1432
1433         return removed ? 0 : -ENOENT;
1434 }
1435
1436 void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
1437 {
1438         struct smp_irk *k, *tmp;
1439
1440         list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
1441                 if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
1442                         continue;
1443
1444                 BT_DBG("%s removing %pMR", hdev->name, bdaddr);
1445
1446                 list_del_rcu(&k->list);
1447                 kfree_rcu(k, rcu);
1448         }
1449 }
1450
1451 bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
1452 {
1453         struct smp_ltk *k;
1454         struct smp_irk *irk;
1455         u8 addr_type;
1456
1457         if (type == BDADDR_BREDR) {
1458                 if (hci_find_link_key(hdev, bdaddr))
1459                         return true;
1460                 return false;
1461         }
1462
1463         /* Convert to HCI addr type which struct smp_ltk uses */
1464         if (type == BDADDR_LE_PUBLIC)
1465                 addr_type = ADDR_LE_DEV_PUBLIC;
1466         else
1467                 addr_type = ADDR_LE_DEV_RANDOM;
1468
1469         irk = hci_get_irk(hdev, bdaddr, addr_type);
1470         if (irk) {
1471                 bdaddr = &irk->bdaddr;
1472                 addr_type = irk->addr_type;
1473         }
1474
1475         rcu_read_lock();
1476         list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
1477                 if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
1478                         rcu_read_unlock();
1479                         return true;
1480                 }
1481         }
1482         rcu_read_unlock();
1483
1484         return false;
1485 }
1486
1487 /* HCI command timer function */
1488 static void hci_cmd_timeout(struct work_struct *work)
1489 {
1490         struct hci_dev *hdev = container_of(work, struct hci_dev,
1491                                             cmd_timer.work);
1492
1493         if (hdev->sent_cmd) {
1494                 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1495                 u16 opcode = __le16_to_cpu(sent->opcode);
1496
1497                 bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode);
1498         } else {
1499                 bt_dev_err(hdev, "command tx timeout");
1500         }
1501
1502         if (hdev->cmd_timeout)
1503                 hdev->cmd_timeout(hdev);
1504
1505         atomic_set(&hdev->cmd_cnt, 1);
1506         queue_work(hdev->workqueue, &hdev->cmd_work);
1507 }
1508
1509 /* HCI ncmd timer function */
1510 static void hci_ncmd_timeout(struct work_struct *work)
1511 {
1512         struct hci_dev *hdev = container_of(work, struct hci_dev,
1513                                             ncmd_timer.work);
1514
1515         bt_dev_err(hdev, "Controller not accepting commands anymore: ncmd = 0");
1516
1517         /* During HCI_INIT phase no events can be injected if the ncmd timer
1518          * triggers since the procedure has its own timeout handling.
1519          */
1520         if (test_bit(HCI_INIT, &hdev->flags))
1521                 return;
1522
1523         /* This is an irrecoverable state, inject hardware error event */
1524         hci_reset_dev(hdev);
1525 }
1526
1527 struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
1528                                           bdaddr_t *bdaddr, u8 bdaddr_type)
1529 {
1530         struct oob_data *data;
1531
1532         list_for_each_entry(data, &hdev->remote_oob_data, list) {
1533                 if (bacmp(bdaddr, &data->bdaddr) != 0)
1534                         continue;
1535                 if (data->bdaddr_type != bdaddr_type)
1536                         continue;
1537                 return data;
1538         }
1539
1540         return NULL;
1541 }
1542
1543 int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1544                                u8 bdaddr_type)
1545 {
1546         struct oob_data *data;
1547
1548         data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1549         if (!data)
1550                 return -ENOENT;
1551
1552         BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type);
1553
1554         list_del(&data->list);
1555         kfree(data);
1556
1557         return 0;
1558 }
1559
1560 void hci_remote_oob_data_clear(struct hci_dev *hdev)
1561 {
1562         struct oob_data *data, *n;
1563
1564         list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1565                 list_del(&data->list);
1566                 kfree(data);
1567         }
1568 }
1569
1570 int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr,
1571                             u8 bdaddr_type, u8 *hash192, u8 *rand192,
1572                             u8 *hash256, u8 *rand256)
1573 {
1574         struct oob_data *data;
1575
1576         data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type);
1577         if (!data) {
1578                 data = kmalloc(sizeof(*data), GFP_KERNEL);
1579                 if (!data)
1580                         return -ENOMEM;
1581
1582                 bacpy(&data->bdaddr, bdaddr);
1583                 data->bdaddr_type = bdaddr_type;
1584                 list_add(&data->list, &hdev->remote_oob_data);
1585         }
1586
1587         if (hash192 && rand192) {
1588                 memcpy(data->hash192, hash192, sizeof(data->hash192));
1589                 memcpy(data->rand192, rand192, sizeof(data->rand192));
1590                 if (hash256 && rand256)
1591                         data->present = 0x03;
1592         } else {
1593                 memset(data->hash192, 0, sizeof(data->hash192));
1594                 memset(data->rand192, 0, sizeof(data->rand192));
1595                 if (hash256 && rand256)
1596                         data->present = 0x02;
1597                 else
1598                         data->present = 0x00;
1599         }
1600
1601         if (hash256 && rand256) {
1602                 memcpy(data->hash256, hash256, sizeof(data->hash256));
1603                 memcpy(data->rand256, rand256, sizeof(data->rand256));
1604         } else {
1605                 memset(data->hash256, 0, sizeof(data->hash256));
1606                 memset(data->rand256, 0, sizeof(data->rand256));
1607                 if (hash192 && rand192)
1608                         data->present = 0x01;
1609         }
1610
1611         BT_DBG("%s for %pMR", hdev->name, bdaddr);
1612
1613         return 0;
1614 }
1615
1616 /* This function requires the caller holds hdev->lock */
1617 struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance)
1618 {
1619         struct adv_info *adv_instance;
1620
1621         list_for_each_entry(adv_instance, &hdev->adv_instances, list) {
1622                 if (adv_instance->instance == instance)
1623                         return adv_instance;
1624         }
1625
1626         return NULL;
1627 }
1628
1629 /* This function requires the caller holds hdev->lock */
1630 struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance)
1631 {
1632         struct adv_info *cur_instance;
1633
1634         cur_instance = hci_find_adv_instance(hdev, instance);
1635         if (!cur_instance)
1636                 return NULL;
1637
1638         if (cur_instance == list_last_entry(&hdev->adv_instances,
1639                                             struct adv_info, list))
1640                 return list_first_entry(&hdev->adv_instances,
1641                                                  struct adv_info, list);
1642         else
1643                 return list_next_entry(cur_instance, list);
1644 }
1645
1646 /* This function requires the caller holds hdev->lock */
1647 int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance)
1648 {
1649         struct adv_info *adv_instance;
1650
1651         adv_instance = hci_find_adv_instance(hdev, instance);
1652         if (!adv_instance)
1653                 return -ENOENT;
1654
1655         BT_DBG("%s removing %dMR", hdev->name, instance);
1656
1657         if (hdev->cur_adv_instance == instance) {
1658                 if (hdev->adv_instance_timeout) {
1659                         cancel_delayed_work(&hdev->adv_instance_expire);
1660                         hdev->adv_instance_timeout = 0;
1661                 }
1662                 hdev->cur_adv_instance = 0x00;
1663         }
1664
1665         cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1666
1667         list_del(&adv_instance->list);
1668         kfree(adv_instance);
1669
1670         hdev->adv_instance_cnt--;
1671
1672         return 0;
1673 }
1674
1675 void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired)
1676 {
1677         struct adv_info *adv_instance, *n;
1678
1679         list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list)
1680                 adv_instance->rpa_expired = rpa_expired;
1681 }
1682
1683 /* This function requires the caller holds hdev->lock */
1684 void hci_adv_instances_clear(struct hci_dev *hdev)
1685 {
1686         struct adv_info *adv_instance, *n;
1687
1688         if (hdev->adv_instance_timeout) {
1689                 cancel_delayed_work(&hdev->adv_instance_expire);
1690                 hdev->adv_instance_timeout = 0;
1691         }
1692
1693         list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
1694                 cancel_delayed_work_sync(&adv_instance->rpa_expired_cb);
1695                 list_del(&adv_instance->list);
1696                 kfree(adv_instance);
1697         }
1698
1699         hdev->adv_instance_cnt = 0;
1700         hdev->cur_adv_instance = 0x00;
1701 }
1702
1703 static void adv_instance_rpa_expired(struct work_struct *work)
1704 {
1705         struct adv_info *adv_instance = container_of(work, struct adv_info,
1706                                                      rpa_expired_cb.work);
1707
1708         BT_DBG("");
1709
1710         adv_instance->rpa_expired = true;
1711 }
1712
1713 /* This function requires the caller holds hdev->lock */
1714 struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
1715                                       u32 flags, u16 adv_data_len, u8 *adv_data,
1716                                       u16 scan_rsp_len, u8 *scan_rsp_data,
1717                                       u16 timeout, u16 duration, s8 tx_power,
1718                                       u32 min_interval, u32 max_interval,
1719                                       u8 mesh_handle)
1720 {
1721         struct adv_info *adv;
1722
1723         adv = hci_find_adv_instance(hdev, instance);
1724         if (adv) {
1725                 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1726                 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1727                 memset(adv->per_adv_data, 0, sizeof(adv->per_adv_data));
1728         } else {
1729                 if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
1730                     instance < 1 || instance > hdev->le_num_of_adv_sets + 1)
1731                         return ERR_PTR(-EOVERFLOW);
1732
1733                 adv = kzalloc(sizeof(*adv), GFP_KERNEL);
1734                 if (!adv)
1735                         return ERR_PTR(-ENOMEM);
1736
1737                 adv->pending = true;
1738                 adv->instance = instance;
1739                 list_add(&adv->list, &hdev->adv_instances);
1740                 hdev->adv_instance_cnt++;
1741         }
1742
1743         adv->flags = flags;
1744         adv->min_interval = min_interval;
1745         adv->max_interval = max_interval;
1746         adv->tx_power = tx_power;
1747         /* Defining a mesh_handle changes the timing units to ms,
1748          * rather than seconds, and ties the instance to the requested
1749          * mesh_tx queue.
1750          */
1751         adv->mesh = mesh_handle;
1752
1753         hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data,
1754                                   scan_rsp_len, scan_rsp_data);
1755
1756         adv->timeout = timeout;
1757         adv->remaining_time = timeout;
1758
1759         if (duration == 0)
1760                 adv->duration = hdev->def_multi_adv_rotation_duration;
1761         else
1762                 adv->duration = duration;
1763
1764         INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired);
1765
1766         BT_DBG("%s for %dMR", hdev->name, instance);
1767
1768         return adv;
1769 }
1770
1771 /* This function requires the caller holds hdev->lock */
1772 struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance,
1773                                       u32 flags, u8 data_len, u8 *data,
1774                                       u32 min_interval, u32 max_interval)
1775 {
1776         struct adv_info *adv;
1777
1778         adv = hci_add_adv_instance(hdev, instance, flags, 0, NULL, 0, NULL,
1779                                    0, 0, HCI_ADV_TX_POWER_NO_PREFERENCE,
1780                                    min_interval, max_interval, 0);
1781         if (IS_ERR(adv))
1782                 return adv;
1783
1784         adv->periodic = true;
1785         adv->per_adv_data_len = data_len;
1786
1787         if (data)
1788                 memcpy(adv->per_adv_data, data, data_len);
1789
1790         return adv;
1791 }
1792
1793 /* This function requires the caller holds hdev->lock */
1794 int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance,
1795                               u16 adv_data_len, u8 *adv_data,
1796                               u16 scan_rsp_len, u8 *scan_rsp_data)
1797 {
1798         struct adv_info *adv;
1799
1800         adv = hci_find_adv_instance(hdev, instance);
1801
1802         /* If advertisement doesn't exist, we can't modify its data */
1803         if (!adv)
1804                 return -ENOENT;
1805
1806         if (adv_data_len && ADV_DATA_CMP(adv, adv_data, adv_data_len)) {
1807                 memset(adv->adv_data, 0, sizeof(adv->adv_data));
1808                 memcpy(adv->adv_data, adv_data, adv_data_len);
1809                 adv->adv_data_len = adv_data_len;
1810                 adv->adv_data_changed = true;
1811         }
1812
1813         if (scan_rsp_len && SCAN_RSP_CMP(adv, scan_rsp_data, scan_rsp_len)) {
1814                 memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data));
1815                 memcpy(adv->scan_rsp_data, scan_rsp_data, scan_rsp_len);
1816                 adv->scan_rsp_len = scan_rsp_len;
1817                 adv->scan_rsp_changed = true;
1818         }
1819
1820         /* Mark as changed if there are flags which would affect it */
1821         if (((adv->flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) ||
1822             adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1823                 adv->scan_rsp_changed = true;
1824
1825         return 0;
1826 }
1827
1828 /* This function requires the caller holds hdev->lock */
1829 u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance)
1830 {
1831         u32 flags;
1832         struct adv_info *adv;
1833
1834         if (instance == 0x00) {
1835                 /* Instance 0 always manages the "Tx Power" and "Flags"
1836                  * fields
1837                  */
1838                 flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS;
1839
1840                 /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting
1841                  * corresponds to the "connectable" instance flag.
1842                  */
1843                 if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE))
1844                         flags |= MGMT_ADV_FLAG_CONNECTABLE;
1845
1846                 if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE))
1847                         flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
1848                 else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
1849                         flags |= MGMT_ADV_FLAG_DISCOV;
1850
1851                 return flags;
1852         }
1853
1854         adv = hci_find_adv_instance(hdev, instance);
1855
1856         /* Return 0 when we got an invalid instance identifier. */
1857         if (!adv)
1858                 return 0;
1859
1860         return adv->flags;
1861 }
1862
1863 bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance)
1864 {
1865         struct adv_info *adv;
1866
1867         /* Instance 0x00 always set local name */
1868         if (instance == 0x00)
1869                 return true;
1870
1871         adv = hci_find_adv_instance(hdev, instance);
1872         if (!adv)
1873                 return false;
1874
1875         if (adv->flags & MGMT_ADV_FLAG_APPEARANCE ||
1876             adv->flags & MGMT_ADV_FLAG_LOCAL_NAME)
1877                 return true;
1878
1879         return adv->scan_rsp_len ? true : false;
1880 }
1881
1882 /* This function requires the caller holds hdev->lock */
1883 void hci_adv_monitors_clear(struct hci_dev *hdev)
1884 {
1885         struct adv_monitor *monitor;
1886         int handle;
1887
1888         idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle)
1889                 hci_free_adv_monitor(hdev, monitor);
1890
1891         idr_destroy(&hdev->adv_monitors_idr);
1892 }
1893
1894 /* Frees the monitor structure and do some bookkeepings.
1895  * This function requires the caller holds hdev->lock.
1896  */
1897 void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1898 {
1899         struct adv_pattern *pattern;
1900         struct adv_pattern *tmp;
1901
1902         if (!monitor)
1903                 return;
1904
1905         list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) {
1906                 list_del(&pattern->list);
1907                 kfree(pattern);
1908         }
1909
1910         if (monitor->handle)
1911                 idr_remove(&hdev->adv_monitors_idr, monitor->handle);
1912
1913         if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) {
1914                 hdev->adv_monitors_cnt--;
1915                 mgmt_adv_monitor_removed(hdev, monitor->handle);
1916         }
1917
1918         kfree(monitor);
1919 }
1920
1921 /* Assigns handle to a monitor, and if offloading is supported and power is on,
1922  * also attempts to forward the request to the controller.
1923  * This function requires the caller holds hci_req_sync_lock.
1924  */
1925 int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
1926 {
1927         int min, max, handle;
1928         int status = 0;
1929
1930         if (!monitor)
1931                 return -EINVAL;
1932
1933         hci_dev_lock(hdev);
1934
1935         min = HCI_MIN_ADV_MONITOR_HANDLE;
1936         max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES;
1937         handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max,
1938                            GFP_KERNEL);
1939
1940         hci_dev_unlock(hdev);
1941
1942         if (handle < 0)
1943                 return handle;
1944
1945         monitor->handle = handle;
1946
1947         if (!hdev_is_powered(hdev))
1948                 return status;
1949
1950         switch (hci_get_adv_monitor_offload_ext(hdev)) {
1951         case HCI_ADV_MONITOR_EXT_NONE:
1952                 bt_dev_dbg(hdev, "%s add monitor %d status %d", hdev->name,
1953                            monitor->handle, status);
1954                 /* Message was not forwarded to controller - not an error */
1955                 break;
1956
1957         case HCI_ADV_MONITOR_EXT_MSFT:
1958                 status = msft_add_monitor_pattern(hdev, monitor);
1959                 bt_dev_dbg(hdev, "%s add monitor %d msft status %d", hdev->name,
1960                            monitor->handle, status);
1961                 break;
1962         }
1963
1964         return status;
1965 }
1966
1967 /* Attempts to tell the controller and free the monitor. If somehow the
1968  * controller doesn't have a corresponding handle, remove anyway.
1969  * This function requires the caller holds hci_req_sync_lock.
1970  */
1971 static int hci_remove_adv_monitor(struct hci_dev *hdev,
1972                                   struct adv_monitor *monitor)
1973 {
1974         int status = 0;
1975         int handle;
1976
1977         switch (hci_get_adv_monitor_offload_ext(hdev)) {
1978         case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */
1979                 bt_dev_dbg(hdev, "%s remove monitor %d status %d", hdev->name,
1980                            monitor->handle, status);
1981                 goto free_monitor;
1982
1983         case HCI_ADV_MONITOR_EXT_MSFT:
1984                 handle = monitor->handle;
1985                 status = msft_remove_monitor(hdev, monitor);
1986                 bt_dev_dbg(hdev, "%s remove monitor %d msft status %d",
1987                            hdev->name, handle, status);
1988                 break;
1989         }
1990
1991         /* In case no matching handle registered, just free the monitor */
1992         if (status == -ENOENT)
1993                 goto free_monitor;
1994
1995         return status;
1996
1997 free_monitor:
1998         if (status == -ENOENT)
1999                 bt_dev_warn(hdev, "Removing monitor with no matching handle %d",
2000                             monitor->handle);
2001         hci_free_adv_monitor(hdev, monitor);
2002
2003         return status;
2004 }
2005
2006 /* This function requires the caller holds hci_req_sync_lock */
2007 int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle)
2008 {
2009         struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, handle);
2010
2011         if (!monitor)
2012                 return -EINVAL;
2013
2014         return hci_remove_adv_monitor(hdev, monitor);
2015 }
2016
2017 /* This function requires the caller holds hci_req_sync_lock */
2018 int hci_remove_all_adv_monitor(struct hci_dev *hdev)
2019 {
2020         struct adv_monitor *monitor;
2021         int idr_next_id = 0;
2022         int status = 0;
2023
2024         while (1) {
2025                 monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id);
2026                 if (!monitor)
2027                         break;
2028
2029                 status = hci_remove_adv_monitor(hdev, monitor);
2030                 if (status)
2031                         return status;
2032
2033                 idr_next_id++;
2034         }
2035
2036         return status;
2037 }
2038
2039 /* This function requires the caller holds hdev->lock */
2040 bool hci_is_adv_monitoring(struct hci_dev *hdev)
2041 {
2042         return !idr_is_empty(&hdev->adv_monitors_idr);
2043 }
2044
2045 int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev)
2046 {
2047         if (msft_monitor_supported(hdev))
2048                 return HCI_ADV_MONITOR_EXT_MSFT;
2049
2050         return HCI_ADV_MONITOR_EXT_NONE;
2051 }
2052
2053 struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list,
2054                                          bdaddr_t *bdaddr, u8 type)
2055 {
2056         struct bdaddr_list *b;
2057
2058         list_for_each_entry(b, bdaddr_list, list) {
2059                 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2060                         return b;
2061         }
2062
2063         return NULL;
2064 }
2065
2066 struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk(
2067                                 struct list_head *bdaddr_list, bdaddr_t *bdaddr,
2068                                 u8 type)
2069 {
2070         struct bdaddr_list_with_irk *b;
2071
2072         list_for_each_entry(b, bdaddr_list, list) {
2073                 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2074                         return b;
2075         }
2076
2077         return NULL;
2078 }
2079
2080 struct bdaddr_list_with_flags *
2081 hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list,
2082                                   bdaddr_t *bdaddr, u8 type)
2083 {
2084         struct bdaddr_list_with_flags *b;
2085
2086         list_for_each_entry(b, bdaddr_list, list) {
2087                 if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type)
2088                         return b;
2089         }
2090
2091         return NULL;
2092 }
2093
2094 void hci_bdaddr_list_clear(struct list_head *bdaddr_list)
2095 {
2096         struct bdaddr_list *b, *n;
2097
2098         list_for_each_entry_safe(b, n, bdaddr_list, list) {
2099                 list_del(&b->list);
2100                 kfree(b);
2101         }
2102 }
2103
2104 int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2105 {
2106         struct bdaddr_list *entry;
2107
2108         if (!bacmp(bdaddr, BDADDR_ANY))
2109                 return -EBADF;
2110
2111         if (hci_bdaddr_list_lookup(list, bdaddr, type))
2112                 return -EEXIST;
2113
2114         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2115         if (!entry)
2116                 return -ENOMEM;
2117
2118         bacpy(&entry->bdaddr, bdaddr);
2119         entry->bdaddr_type = type;
2120
2121         list_add(&entry->list, list);
2122
2123         return 0;
2124 }
2125
2126 int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2127                                         u8 type, u8 *peer_irk, u8 *local_irk)
2128 {
2129         struct bdaddr_list_with_irk *entry;
2130
2131         if (!bacmp(bdaddr, BDADDR_ANY))
2132                 return -EBADF;
2133
2134         if (hci_bdaddr_list_lookup(list, bdaddr, type))
2135                 return -EEXIST;
2136
2137         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2138         if (!entry)
2139                 return -ENOMEM;
2140
2141         bacpy(&entry->bdaddr, bdaddr);
2142         entry->bdaddr_type = type;
2143
2144         if (peer_irk)
2145                 memcpy(entry->peer_irk, peer_irk, 16);
2146
2147         if (local_irk)
2148                 memcpy(entry->local_irk, local_irk, 16);
2149
2150         list_add(&entry->list, list);
2151
2152         return 0;
2153 }
2154
2155 int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2156                                    u8 type, u32 flags)
2157 {
2158         struct bdaddr_list_with_flags *entry;
2159
2160         if (!bacmp(bdaddr, BDADDR_ANY))
2161                 return -EBADF;
2162
2163         if (hci_bdaddr_list_lookup(list, bdaddr, type))
2164                 return -EEXIST;
2165
2166         entry = kzalloc(sizeof(*entry), GFP_KERNEL);
2167         if (!entry)
2168                 return -ENOMEM;
2169
2170         bacpy(&entry->bdaddr, bdaddr);
2171         entry->bdaddr_type = type;
2172         entry->flags = flags;
2173
2174         list_add(&entry->list, list);
2175
2176         return 0;
2177 }
2178
2179 int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type)
2180 {
2181         struct bdaddr_list *entry;
2182
2183         if (!bacmp(bdaddr, BDADDR_ANY)) {
2184                 hci_bdaddr_list_clear(list);
2185                 return 0;
2186         }
2187
2188         entry = hci_bdaddr_list_lookup(list, bdaddr, type);
2189         if (!entry)
2190                 return -ENOENT;
2191
2192         list_del(&entry->list);
2193         kfree(entry);
2194
2195         return 0;
2196 }
2197
2198 int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr,
2199                                                         u8 type)
2200 {
2201         struct bdaddr_list_with_irk *entry;
2202
2203         if (!bacmp(bdaddr, BDADDR_ANY)) {
2204                 hci_bdaddr_list_clear(list);
2205                 return 0;
2206         }
2207
2208         entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type);
2209         if (!entry)
2210                 return -ENOENT;
2211
2212         list_del(&entry->list);
2213         kfree(entry);
2214
2215         return 0;
2216 }
2217
2218 int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr,
2219                                    u8 type)
2220 {
2221         struct bdaddr_list_with_flags *entry;
2222
2223         if (!bacmp(bdaddr, BDADDR_ANY)) {
2224                 hci_bdaddr_list_clear(list);
2225                 return 0;
2226         }
2227
2228         entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type);
2229         if (!entry)
2230                 return -ENOENT;
2231
2232         list_del(&entry->list);
2233         kfree(entry);
2234
2235         return 0;
2236 }
2237
2238 /* This function requires the caller holds hdev->lock */
2239 struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
2240                                                bdaddr_t *addr, u8 addr_type)
2241 {
2242         struct hci_conn_params *params;
2243
2244         list_for_each_entry(params, &hdev->le_conn_params, list) {
2245                 if (bacmp(&params->addr, addr) == 0 &&
2246                     params->addr_type == addr_type) {
2247                         return params;
2248                 }
2249         }
2250
2251         return NULL;
2252 }
2253
2254 /* This function requires the caller holds hdev->lock or rcu_read_lock */
2255 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
2256                                                   bdaddr_t *addr, u8 addr_type)
2257 {
2258         struct hci_conn_params *param;
2259
2260         rcu_read_lock();
2261
2262         list_for_each_entry_rcu(param, list, action) {
2263                 if (bacmp(&param->addr, addr) == 0 &&
2264                     param->addr_type == addr_type) {
2265                         rcu_read_unlock();
2266                         return param;
2267                 }
2268         }
2269
2270         rcu_read_unlock();
2271
2272         return NULL;
2273 }
2274
2275 /* This function requires the caller holds hdev->lock */
2276 void hci_pend_le_list_del_init(struct hci_conn_params *param)
2277 {
2278         if (list_empty(&param->action))
2279                 return;
2280
2281         list_del_rcu(&param->action);
2282         synchronize_rcu();
2283         INIT_LIST_HEAD(&param->action);
2284 }
2285
2286 /* This function requires the caller holds hdev->lock */
2287 void hci_pend_le_list_add(struct hci_conn_params *param,
2288                           struct list_head *list)
2289 {
2290         list_add_rcu(&param->action, list);
2291 }
2292
2293 /* This function requires the caller holds hdev->lock */
2294 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
2295                                             bdaddr_t *addr, u8 addr_type)
2296 {
2297         struct hci_conn_params *params;
2298
2299         params = hci_conn_params_lookup(hdev, addr, addr_type);
2300         if (params)
2301                 return params;
2302
2303         params = kzalloc(sizeof(*params), GFP_KERNEL);
2304         if (!params) {
2305                 bt_dev_err(hdev, "out of memory");
2306                 return NULL;
2307         }
2308
2309         bacpy(&params->addr, addr);
2310         params->addr_type = addr_type;
2311
2312         list_add(&params->list, &hdev->le_conn_params);
2313         INIT_LIST_HEAD(&params->action);
2314
2315         params->conn_min_interval = hdev->le_conn_min_interval;
2316         params->conn_max_interval = hdev->le_conn_max_interval;
2317         params->conn_latency = hdev->le_conn_latency;
2318         params->supervision_timeout = hdev->le_supv_timeout;
2319         params->auto_connect = HCI_AUTO_CONN_DISABLED;
2320
2321         BT_DBG("addr %pMR (type %u)", addr, addr_type);
2322
2323         return params;
2324 }
2325
2326 void hci_conn_params_free(struct hci_conn_params *params)
2327 {
2328         hci_pend_le_list_del_init(params);
2329
2330         if (params->conn) {
2331                 hci_conn_drop(params->conn);
2332                 hci_conn_put(params->conn);
2333         }
2334
2335         list_del(&params->list);
2336         kfree(params);
2337 }
2338
2339 /* This function requires the caller holds hdev->lock */
2340 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
2341 {
2342         struct hci_conn_params *params;
2343
2344         params = hci_conn_params_lookup(hdev, addr, addr_type);
2345         if (!params)
2346                 return;
2347
2348         hci_conn_params_free(params);
2349
2350         hci_update_passive_scan(hdev);
2351
2352         BT_DBG("addr %pMR (type %u)", addr, addr_type);
2353 }
2354
2355 /* This function requires the caller holds hdev->lock */
2356 void hci_conn_params_clear_disabled(struct hci_dev *hdev)
2357 {
2358         struct hci_conn_params *params, *tmp;
2359
2360         list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
2361                 if (params->auto_connect != HCI_AUTO_CONN_DISABLED)
2362                         continue;
2363
2364                 /* If trying to establish one time connection to disabled
2365                  * device, leave the params, but mark them as just once.
2366                  */
2367                 if (params->explicit_connect) {
2368                         params->auto_connect = HCI_AUTO_CONN_EXPLICIT;
2369                         continue;
2370                 }
2371
2372                 hci_conn_params_free(params);
2373         }
2374
2375         BT_DBG("All LE disabled connection parameters were removed");
2376 }
2377
2378 /* This function requires the caller holds hdev->lock */
2379 static void hci_conn_params_clear_all(struct hci_dev *hdev)
2380 {
2381         struct hci_conn_params *params, *tmp;
2382
2383         list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list)
2384                 hci_conn_params_free(params);
2385
2386         BT_DBG("All LE connection parameters were removed");
2387 }
2388
2389 /* Copy the Identity Address of the controller.
2390  *
2391  * If the controller has a public BD_ADDR, then by default use that one.
2392  * If this is a LE only controller without a public address, default to
2393  * the static random address.
2394  *
2395  * For debugging purposes it is possible to force controllers with a
2396  * public address to use the static random address instead.
2397  *
2398  * In case BR/EDR has been disabled on a dual-mode controller and
2399  * userspace has configured a static address, then that address
2400  * becomes the identity address instead of the public BR/EDR address.
2401  */
2402 void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr,
2403                                u8 *bdaddr_type)
2404 {
2405         if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
2406             !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
2407             (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
2408              bacmp(&hdev->static_addr, BDADDR_ANY))) {
2409                 bacpy(bdaddr, &hdev->static_addr);
2410                 *bdaddr_type = ADDR_LE_DEV_RANDOM;
2411         } else {
2412                 bacpy(bdaddr, &hdev->bdaddr);
2413                 *bdaddr_type = ADDR_LE_DEV_PUBLIC;
2414         }
2415 }
2416
2417 static void hci_clear_wake_reason(struct hci_dev *hdev)
2418 {
2419         hci_dev_lock(hdev);
2420
2421         hdev->wake_reason = 0;
2422         bacpy(&hdev->wake_addr, BDADDR_ANY);
2423         hdev->wake_addr_type = 0;
2424
2425         hci_dev_unlock(hdev);
2426 }
2427
2428 static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action,
2429                                 void *data)
2430 {
2431         struct hci_dev *hdev =
2432                 container_of(nb, struct hci_dev, suspend_notifier);
2433         int ret = 0;
2434
2435         /* Userspace has full control of this device. Do nothing. */
2436         if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
2437                 return NOTIFY_DONE;
2438
2439         if (action == PM_SUSPEND_PREPARE)
2440                 ret = hci_suspend_dev(hdev);
2441         else if (action == PM_POST_SUSPEND)
2442                 ret = hci_resume_dev(hdev);
2443
2444         if (ret)
2445                 bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d",
2446                            action, ret);
2447
2448         return NOTIFY_DONE;
2449 }
2450
2451 /* Alloc HCI device */
2452 struct hci_dev *hci_alloc_dev_priv(int sizeof_priv)
2453 {
2454         struct hci_dev *hdev;
2455         unsigned int alloc_size;
2456
2457         alloc_size = sizeof(*hdev);
2458         if (sizeof_priv) {
2459                 /* Fixme: May need ALIGN-ment? */
2460                 alloc_size += sizeof_priv;
2461         }
2462
2463         hdev = kzalloc(alloc_size, GFP_KERNEL);
2464         if (!hdev)
2465                 return NULL;
2466
2467         hdev->pkt_type  = (HCI_DM1 | HCI_DH1 | HCI_HV1);
2468         hdev->esco_type = (ESCO_HV1);
2469         hdev->link_mode = (HCI_LM_ACCEPT);
2470         hdev->num_iac = 0x01;           /* One IAC support is mandatory */
2471         hdev->io_capability = 0x03;     /* No Input No Output */
2472         hdev->manufacturer = 0xffff;    /* Default to internal use */
2473         hdev->inq_tx_power = HCI_TX_POWER_INVALID;
2474         hdev->adv_tx_power = HCI_TX_POWER_INVALID;
2475         hdev->adv_instance_cnt = 0;
2476         hdev->cur_adv_instance = 0x00;
2477         hdev->adv_instance_timeout = 0;
2478
2479         hdev->advmon_allowlist_duration = 300;
2480         hdev->advmon_no_filter_duration = 500;
2481         hdev->enable_advmon_interleave_scan = 0x00;     /* Default to disable */
2482
2483         hdev->sniff_max_interval = 800;
2484         hdev->sniff_min_interval = 80;
2485
2486         hdev->le_adv_channel_map = 0x07;
2487         hdev->le_adv_min_interval = 0x0800;
2488         hdev->le_adv_max_interval = 0x0800;
2489         hdev->le_scan_interval = 0x0060;
2490         hdev->le_scan_window = 0x0030;
2491         hdev->le_scan_int_suspend = 0x0400;
2492         hdev->le_scan_window_suspend = 0x0012;
2493         hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
2494         hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
2495         hdev->le_scan_int_adv_monitor = 0x0060;
2496         hdev->le_scan_window_adv_monitor = 0x0030;
2497         hdev->le_scan_int_connect = 0x0060;
2498         hdev->le_scan_window_connect = 0x0060;
2499         hdev->le_conn_min_interval = 0x0018;
2500         hdev->le_conn_max_interval = 0x0028;
2501         hdev->le_conn_latency = 0x0000;
2502         hdev->le_supv_timeout = 0x002a;
2503         hdev->le_def_tx_len = 0x001b;
2504         hdev->le_def_tx_time = 0x0148;
2505         hdev->le_max_tx_len = 0x001b;
2506         hdev->le_max_tx_time = 0x0148;
2507         hdev->le_max_rx_len = 0x001b;
2508         hdev->le_max_rx_time = 0x0148;
2509         hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
2510         hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
2511         hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
2512         hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
2513         hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
2514         hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
2515         hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT;
2516         hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
2517         hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
2518
2519         hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
2520         hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
2521         hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
2522         hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
2523         hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
2524         hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
2525
2526         /* default 1.28 sec page scan */
2527         hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
2528         hdev->def_page_scan_int = 0x0800;
2529         hdev->def_page_scan_window = 0x0012;
2530
2531         mutex_init(&hdev->lock);
2532         mutex_init(&hdev->req_lock);
2533
2534         INIT_LIST_HEAD(&hdev->mesh_pending);
2535         INIT_LIST_HEAD(&hdev->mgmt_pending);
2536         INIT_LIST_HEAD(&hdev->reject_list);
2537         INIT_LIST_HEAD(&hdev->accept_list);
2538         INIT_LIST_HEAD(&hdev->uuids);
2539         INIT_LIST_HEAD(&hdev->link_keys);
2540         INIT_LIST_HEAD(&hdev->long_term_keys);
2541         INIT_LIST_HEAD(&hdev->identity_resolving_keys);
2542         INIT_LIST_HEAD(&hdev->remote_oob_data);
2543         INIT_LIST_HEAD(&hdev->le_accept_list);
2544         INIT_LIST_HEAD(&hdev->le_resolv_list);
2545         INIT_LIST_HEAD(&hdev->le_conn_params);
2546         INIT_LIST_HEAD(&hdev->pend_le_conns);
2547         INIT_LIST_HEAD(&hdev->pend_le_reports);
2548         INIT_LIST_HEAD(&hdev->conn_hash.list);
2549         INIT_LIST_HEAD(&hdev->adv_instances);
2550         INIT_LIST_HEAD(&hdev->blocked_keys);
2551         INIT_LIST_HEAD(&hdev->monitored_devices);
2552
2553         INIT_LIST_HEAD(&hdev->local_codecs);
2554         INIT_WORK(&hdev->rx_work, hci_rx_work);
2555         INIT_WORK(&hdev->cmd_work, hci_cmd_work);
2556         INIT_WORK(&hdev->tx_work, hci_tx_work);
2557         INIT_WORK(&hdev->power_on, hci_power_on);
2558         INIT_WORK(&hdev->error_reset, hci_error_reset);
2559
2560         hci_cmd_sync_init(hdev);
2561
2562         INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
2563
2564         skb_queue_head_init(&hdev->rx_q);
2565         skb_queue_head_init(&hdev->cmd_q);
2566         skb_queue_head_init(&hdev->raw_q);
2567
2568         init_waitqueue_head(&hdev->req_wait_q);
2569
2570         INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
2571         INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout);
2572
2573         hci_devcd_setup(hdev);
2574         hci_request_setup(hdev);
2575
2576         hci_init_sysfs(hdev);
2577         discovery_init(hdev);
2578
2579         return hdev;
2580 }
2581 EXPORT_SYMBOL(hci_alloc_dev_priv);
2582
2583 /* Free HCI device */
2584 void hci_free_dev(struct hci_dev *hdev)
2585 {
2586         /* will free via device release */
2587         put_device(&hdev->dev);
2588 }
2589 EXPORT_SYMBOL(hci_free_dev);
2590
2591 /* Register HCI device */
2592 int hci_register_dev(struct hci_dev *hdev)
2593 {
2594         int id, error;
2595
2596         if (!hdev->open || !hdev->close || !hdev->send)
2597                 return -EINVAL;
2598
2599         /* Do not allow HCI_AMP devices to register at index 0,
2600          * so the index can be used as the AMP controller ID.
2601          */
2602         switch (hdev->dev_type) {
2603         case HCI_PRIMARY:
2604                 id = ida_simple_get(&hci_index_ida, 0, HCI_MAX_ID, GFP_KERNEL);
2605                 break;
2606         case HCI_AMP:
2607                 id = ida_simple_get(&hci_index_ida, 1, HCI_MAX_ID, GFP_KERNEL);
2608                 break;
2609         default:
2610                 return -EINVAL;
2611         }
2612
2613         if (id < 0)
2614                 return id;
2615
2616         snprintf(hdev->name, sizeof(hdev->name), "hci%d", id);
2617         hdev->id = id;
2618
2619         BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2620
2621         hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name);
2622         if (!hdev->workqueue) {
2623                 error = -ENOMEM;
2624                 goto err;
2625         }
2626
2627         hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI,
2628                                                       hdev->name);
2629         if (!hdev->req_workqueue) {
2630                 destroy_workqueue(hdev->workqueue);
2631                 error = -ENOMEM;
2632                 goto err;
2633         }
2634
2635         if (!IS_ERR_OR_NULL(bt_debugfs))
2636                 hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
2637
2638         dev_set_name(&hdev->dev, "%s", hdev->name);
2639
2640         error = device_add(&hdev->dev);
2641         if (error < 0)
2642                 goto err_wqueue;
2643
2644         hci_leds_init(hdev);
2645
2646         hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
2647                                     RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
2648                                     hdev);
2649         if (hdev->rfkill) {
2650                 if (rfkill_register(hdev->rfkill) < 0) {
2651                         rfkill_destroy(hdev->rfkill);
2652                         hdev->rfkill = NULL;
2653                 }
2654         }
2655
2656         if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
2657                 hci_dev_set_flag(hdev, HCI_RFKILLED);
2658
2659         hci_dev_set_flag(hdev, HCI_SETUP);
2660         hci_dev_set_flag(hdev, HCI_AUTO_OFF);
2661
2662         if (hdev->dev_type == HCI_PRIMARY) {
2663                 /* Assume BR/EDR support until proven otherwise (such as
2664                  * through reading supported features during init.
2665                  */
2666                 hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
2667         }
2668
2669         write_lock(&hci_dev_list_lock);
2670         list_add(&hdev->list, &hci_dev_list);
2671         write_unlock(&hci_dev_list_lock);
2672
2673         /* Devices that are marked for raw-only usage are unconfigured
2674          * and should not be included in normal operation.
2675          */
2676         if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
2677                 hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
2678
2679         /* Mark Remote Wakeup connection flag as supported if driver has wakeup
2680          * callback.
2681          */
2682         if (hdev->wakeup)
2683                 hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP;
2684
2685         hci_sock_dev_event(hdev, HCI_DEV_REG);
2686         hci_dev_hold(hdev);
2687
2688         error = hci_register_suspend_notifier(hdev);
2689         if (error)
2690                 BT_WARN("register suspend notifier failed error:%d\n", error);
2691
2692         queue_work(hdev->req_workqueue, &hdev->power_on);
2693
2694         idr_init(&hdev->adv_monitors_idr);
2695         msft_register(hdev);
2696
2697         return id;
2698
2699 err_wqueue:
2700         debugfs_remove_recursive(hdev->debugfs);
2701         destroy_workqueue(hdev->workqueue);
2702         destroy_workqueue(hdev->req_workqueue);
2703 err:
2704         ida_simple_remove(&hci_index_ida, hdev->id);
2705
2706         return error;
2707 }
2708 EXPORT_SYMBOL(hci_register_dev);
2709
2710 /* Unregister HCI device */
2711 void hci_unregister_dev(struct hci_dev *hdev)
2712 {
2713         BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
2714
2715         mutex_lock(&hdev->unregister_lock);
2716         hci_dev_set_flag(hdev, HCI_UNREGISTER);
2717         mutex_unlock(&hdev->unregister_lock);
2718
2719         write_lock(&hci_dev_list_lock);
2720         list_del(&hdev->list);
2721         write_unlock(&hci_dev_list_lock);
2722
2723         cancel_work_sync(&hdev->power_on);
2724
2725         hci_cmd_sync_clear(hdev);
2726
2727         hci_unregister_suspend_notifier(hdev);
2728
2729         msft_unregister(hdev);
2730
2731         hci_dev_do_close(hdev);
2732
2733         if (!test_bit(HCI_INIT, &hdev->flags) &&
2734             !hci_dev_test_flag(hdev, HCI_SETUP) &&
2735             !hci_dev_test_flag(hdev, HCI_CONFIG)) {
2736                 hci_dev_lock(hdev);
2737                 mgmt_index_removed(hdev);
2738                 hci_dev_unlock(hdev);
2739         }
2740
2741         /* mgmt_index_removed should take care of emptying the
2742          * pending list */
2743         BUG_ON(!list_empty(&hdev->mgmt_pending));
2744
2745         hci_sock_dev_event(hdev, HCI_DEV_UNREG);
2746
2747         if (hdev->rfkill) {
2748                 rfkill_unregister(hdev->rfkill);
2749                 rfkill_destroy(hdev->rfkill);
2750         }
2751
2752         device_del(&hdev->dev);
2753         /* Actual cleanup is deferred until hci_release_dev(). */
2754         hci_dev_put(hdev);
2755 }
2756 EXPORT_SYMBOL(hci_unregister_dev);
2757
2758 /* Release HCI device */
2759 void hci_release_dev(struct hci_dev *hdev)
2760 {
2761         debugfs_remove_recursive(hdev->debugfs);
2762         kfree_const(hdev->hw_info);
2763         kfree_const(hdev->fw_info);
2764
2765         destroy_workqueue(hdev->workqueue);
2766         destroy_workqueue(hdev->req_workqueue);
2767
2768         hci_dev_lock(hdev);
2769         hci_bdaddr_list_clear(&hdev->reject_list);
2770         hci_bdaddr_list_clear(&hdev->accept_list);
2771         hci_uuids_clear(hdev);
2772         hci_link_keys_clear(hdev);
2773         hci_smp_ltks_clear(hdev);
2774         hci_smp_irks_clear(hdev);
2775         hci_remote_oob_data_clear(hdev);
2776         hci_adv_instances_clear(hdev);
2777         hci_adv_monitors_clear(hdev);
2778         hci_bdaddr_list_clear(&hdev->le_accept_list);
2779         hci_bdaddr_list_clear(&hdev->le_resolv_list);
2780         hci_conn_params_clear_all(hdev);
2781         hci_discovery_filter_clear(hdev);
2782         hci_blocked_keys_clear(hdev);
2783         hci_dev_unlock(hdev);
2784
2785         ida_simple_remove(&hci_index_ida, hdev->id);
2786         kfree_skb(hdev->sent_cmd);
2787         kfree_skb(hdev->recv_event);
2788         kfree(hdev);
2789 }
2790 EXPORT_SYMBOL(hci_release_dev);
2791
2792 int hci_register_suspend_notifier(struct hci_dev *hdev)
2793 {
2794         int ret = 0;
2795
2796         if (!hdev->suspend_notifier.notifier_call &&
2797             !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) {
2798                 hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
2799                 ret = register_pm_notifier(&hdev->suspend_notifier);
2800         }
2801
2802         return ret;
2803 }
2804
2805 int hci_unregister_suspend_notifier(struct hci_dev *hdev)
2806 {
2807         int ret = 0;
2808
2809         if (hdev->suspend_notifier.notifier_call) {
2810                 ret = unregister_pm_notifier(&hdev->suspend_notifier);
2811                 if (!ret)
2812                         hdev->suspend_notifier.notifier_call = NULL;
2813         }
2814
2815         return ret;
2816 }
2817
2818 /* Suspend HCI device */
2819 int hci_suspend_dev(struct hci_dev *hdev)
2820 {
2821         int ret;
2822
2823         bt_dev_dbg(hdev, "");
2824
2825         /* Suspend should only act on when powered. */
2826         if (!hdev_is_powered(hdev) ||
2827             hci_dev_test_flag(hdev, HCI_UNREGISTER))
2828                 return 0;
2829
2830         /* If powering down don't attempt to suspend */
2831         if (mgmt_powering_down(hdev))
2832                 return 0;
2833
2834         /* Cancel potentially blocking sync operation before suspend */
2835         __hci_cmd_sync_cancel(hdev, -EHOSTDOWN);
2836
2837         hci_req_sync_lock(hdev);
2838         ret = hci_suspend_sync(hdev);
2839         hci_req_sync_unlock(hdev);
2840
2841         hci_clear_wake_reason(hdev);
2842         mgmt_suspending(hdev, hdev->suspend_state);
2843
2844         hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
2845         return ret;
2846 }
2847 EXPORT_SYMBOL(hci_suspend_dev);
2848
2849 /* Resume HCI device */
2850 int hci_resume_dev(struct hci_dev *hdev)
2851 {
2852         int ret;
2853
2854         bt_dev_dbg(hdev, "");
2855
2856         /* Resume should only act on when powered. */
2857         if (!hdev_is_powered(hdev) ||
2858             hci_dev_test_flag(hdev, HCI_UNREGISTER))
2859                 return 0;
2860
2861         /* If powering down don't attempt to resume */
2862         if (mgmt_powering_down(hdev))
2863                 return 0;
2864
2865         hci_req_sync_lock(hdev);
2866         ret = hci_resume_sync(hdev);
2867         hci_req_sync_unlock(hdev);
2868
2869         mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
2870                       hdev->wake_addr_type);
2871
2872         hci_sock_dev_event(hdev, HCI_DEV_RESUME);
2873         return ret;
2874 }
2875 EXPORT_SYMBOL(hci_resume_dev);
2876
2877 /* Reset HCI device */
2878 int hci_reset_dev(struct hci_dev *hdev)
2879 {
2880         static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 };
2881         struct sk_buff *skb;
2882
2883         skb = bt_skb_alloc(3, GFP_ATOMIC);
2884         if (!skb)
2885                 return -ENOMEM;
2886
2887         hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
2888         skb_put_data(skb, hw_err, 3);
2889
2890         bt_dev_err(hdev, "Injecting HCI hardware error event");
2891
2892         /* Send Hardware Error to upper stack */
2893         return hci_recv_frame(hdev, skb);
2894 }
2895 EXPORT_SYMBOL(hci_reset_dev);
2896
2897 /* Receive frame from HCI drivers */
2898 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
2899 {
2900         if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
2901                       && !test_bit(HCI_INIT, &hdev->flags))) {
2902                 kfree_skb(skb);
2903                 return -ENXIO;
2904         }
2905
2906         switch (hci_skb_pkt_type(skb)) {
2907         case HCI_EVENT_PKT:
2908                 break;
2909         case HCI_ACLDATA_PKT:
2910                 /* Detect if ISO packet has been sent as ACL */
2911                 if (hci_conn_num(hdev, ISO_LINK)) {
2912                         __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
2913                         __u8 type;
2914
2915                         type = hci_conn_lookup_type(hdev, hci_handle(handle));
2916                         if (type == ISO_LINK)
2917                                 hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
2918                 }
2919                 break;
2920         case HCI_SCODATA_PKT:
2921                 break;
2922         case HCI_ISODATA_PKT:
2923                 break;
2924         default:
2925                 kfree_skb(skb);
2926                 return -EINVAL;
2927         }
2928
2929         /* Incoming skb */
2930         bt_cb(skb)->incoming = 1;
2931
2932         /* Time stamp */
2933         __net_timestamp(skb);
2934
2935         skb_queue_tail(&hdev->rx_q, skb);
2936         queue_work(hdev->workqueue, &hdev->rx_work);
2937
2938         return 0;
2939 }
2940 EXPORT_SYMBOL(hci_recv_frame);
2941
2942 /* Receive diagnostic message from HCI drivers */
2943 int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
2944 {
2945         /* Mark as diagnostic packet */
2946         hci_skb_pkt_type(skb) = HCI_DIAG_PKT;
2947
2948         /* Time stamp */
2949         __net_timestamp(skb);
2950
2951         skb_queue_tail(&hdev->rx_q, skb);
2952         queue_work(hdev->workqueue, &hdev->rx_work);
2953
2954         return 0;
2955 }
2956 EXPORT_SYMBOL(hci_recv_diag);
2957
2958 void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...)
2959 {
2960         va_list vargs;
2961
2962         va_start(vargs, fmt);
2963         kfree_const(hdev->hw_info);
2964         hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2965         va_end(vargs);
2966 }
2967 EXPORT_SYMBOL(hci_set_hw_info);
2968
2969 void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...)
2970 {
2971         va_list vargs;
2972
2973         va_start(vargs, fmt);
2974         kfree_const(hdev->fw_info);
2975         hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs);
2976         va_end(vargs);
2977 }
2978 EXPORT_SYMBOL(hci_set_fw_info);
2979
2980 /* ---- Interface to upper protocols ---- */
2981
2982 int hci_register_cb(struct hci_cb *cb)
2983 {
2984         BT_DBG("%p name %s", cb, cb->name);
2985
2986         mutex_lock(&hci_cb_list_lock);
2987         list_add_tail(&cb->list, &hci_cb_list);
2988         mutex_unlock(&hci_cb_list_lock);
2989
2990         return 0;
2991 }
2992 EXPORT_SYMBOL(hci_register_cb);
2993
2994 int hci_unregister_cb(struct hci_cb *cb)
2995 {
2996         BT_DBG("%p name %s", cb, cb->name);
2997
2998         mutex_lock(&hci_cb_list_lock);
2999         list_del(&cb->list);
3000         mutex_unlock(&hci_cb_list_lock);
3001
3002         return 0;
3003 }
3004 EXPORT_SYMBOL(hci_unregister_cb);
3005
3006 static int hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
3007 {
3008         int err;
3009
3010         BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb),
3011                skb->len);
3012
3013         /* Time stamp */
3014         __net_timestamp(skb);
3015
3016         /* Send copy to monitor */
3017         hci_send_to_monitor(hdev, skb);
3018
3019         if (atomic_read(&hdev->promisc)) {
3020                 /* Send copy to the sockets */
3021                 hci_send_to_sock(hdev, skb);
3022         }
3023
3024         /* Get rid of skb owner, prior to sending to the driver. */
3025         skb_orphan(skb);
3026
3027         if (!test_bit(HCI_RUNNING, &hdev->flags)) {
3028                 kfree_skb(skb);
3029                 return -EINVAL;
3030         }
3031
3032         err = hdev->send(hdev, skb);
3033         if (err < 0) {
3034                 bt_dev_err(hdev, "sending frame failed (%d)", err);
3035                 kfree_skb(skb);
3036                 return err;
3037         }
3038
3039         return 0;
3040 }
3041
3042 /* Send HCI command */
3043 int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen,
3044                  const void *param)
3045 {
3046         struct sk_buff *skb;
3047
3048         BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);
3049
3050         skb = hci_prepare_cmd(hdev, opcode, plen, param);
3051         if (!skb) {
3052                 bt_dev_err(hdev, "no memory for command");
3053                 return -ENOMEM;
3054         }
3055
3056         /* Stand-alone HCI commands must be flagged as
3057          * single-command requests.
3058          */
3059         bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
3060
3061         skb_queue_tail(&hdev->cmd_q, skb);
3062         queue_work(hdev->workqueue, &hdev->cmd_work);
3063
3064         return 0;
3065 }
3066
3067 int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen,
3068                    const void *param)
3069 {
3070         struct sk_buff *skb;
3071
3072         if (hci_opcode_ogf(opcode) != 0x3f) {
3073                 /* A controller receiving a command shall respond with either
3074                  * a Command Status Event or a Command Complete Event.
3075                  * Therefore, all standard HCI commands must be sent via the
3076                  * standard API, using hci_send_cmd or hci_cmd_sync helpers.
3077                  * Some vendors do not comply with this rule for vendor-specific
3078                  * commands and do not return any event. We want to support
3079                  * unresponded commands for such cases only.
3080                  */
3081                 bt_dev_err(hdev, "unresponded command not supported");
3082                 return -EINVAL;
3083         }
3084
3085         skb = hci_prepare_cmd(hdev, opcode, plen, param);
3086         if (!skb) {
3087                 bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)",
3088                            opcode);
3089                 return -ENOMEM;
3090         }
3091
3092         hci_send_frame(hdev, skb);
3093
3094         return 0;
3095 }
3096 EXPORT_SYMBOL(__hci_cmd_send);
3097
3098 /* Get data from the previously sent command */
3099 void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
3100 {
3101         struct hci_command_hdr *hdr;
3102
3103         if (!hdev->sent_cmd)
3104                 return NULL;
3105
3106         hdr = (void *) hdev->sent_cmd->data;
3107
3108         if (hdr->opcode != cpu_to_le16(opcode))
3109                 return NULL;
3110
3111         BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode);
3112
3113         return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
3114 }
3115
3116 /* Get data from last received event */
3117 void *hci_recv_event_data(struct hci_dev *hdev, __u8 event)
3118 {
3119         struct hci_event_hdr *hdr;
3120         int offset;
3121
3122         if (!hdev->recv_event)
3123                 return NULL;
3124
3125         hdr = (void *)hdev->recv_event->data;
3126         offset = sizeof(*hdr);
3127
3128         if (hdr->evt != event) {
3129                 /* In case of LE metaevent check the subevent match */
3130                 if (hdr->evt == HCI_EV_LE_META) {
3131                         struct hci_ev_le_meta *ev;
3132
3133                         ev = (void *)hdev->recv_event->data + offset;
3134                         offset += sizeof(*ev);
3135                         if (ev->subevent == event)
3136                                 goto found;
3137                 }
3138                 return NULL;
3139         }
3140
3141 found:
3142         bt_dev_dbg(hdev, "event 0x%2.2x", event);
3143
3144         return hdev->recv_event->data + offset;
3145 }
3146
3147 /* Send ACL data */
3148 static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
3149 {
3150         struct hci_acl_hdr *hdr;
3151         int len = skb->len;
3152
3153         skb_push(skb, HCI_ACL_HDR_SIZE);
3154         skb_reset_transport_header(skb);
3155         hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
3156         hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3157         hdr->dlen   = cpu_to_le16(len);
3158 }
3159
3160 static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
3161                           struct sk_buff *skb, __u16 flags)
3162 {
3163         struct hci_conn *conn = chan->conn;
3164         struct hci_dev *hdev = conn->hdev;
3165         struct sk_buff *list;
3166
3167         skb->len = skb_headlen(skb);
3168         skb->data_len = 0;
3169
3170         hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3171
3172         switch (hdev->dev_type) {
3173         case HCI_PRIMARY:
3174                 hci_add_acl_hdr(skb, conn->handle, flags);
3175                 break;
3176         case HCI_AMP:
3177                 hci_add_acl_hdr(skb, chan->handle, flags);
3178                 break;
3179         default:
3180                 bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type);
3181                 return;
3182         }
3183
3184         list = skb_shinfo(skb)->frag_list;
3185         if (!list) {
3186                 /* Non fragmented */
3187                 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3188
3189                 skb_queue_tail(queue, skb);
3190         } else {
3191                 /* Fragmented */
3192                 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3193
3194                 skb_shinfo(skb)->frag_list = NULL;
3195
3196                 /* Queue all fragments atomically. We need to use spin_lock_bh
3197                  * here because of 6LoWPAN links, as there this function is
3198                  * called from softirq and using normal spin lock could cause
3199                  * deadlocks.
3200                  */
3201                 spin_lock_bh(&queue->lock);
3202
3203                 __skb_queue_tail(queue, skb);
3204
3205                 flags &= ~ACL_START;
3206                 flags |= ACL_CONT;
3207                 do {
3208                         skb = list; list = list->next;
3209
3210                         hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
3211                         hci_add_acl_hdr(skb, conn->handle, flags);
3212
3213                         BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3214
3215                         __skb_queue_tail(queue, skb);
3216                 } while (list);
3217
3218                 spin_unlock_bh(&queue->lock);
3219         }
3220 }
3221
3222 void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
3223 {
3224         struct hci_dev *hdev = chan->conn->hdev;
3225
3226         BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags);
3227
3228         hci_queue_acl(chan, &chan->data_q, skb, flags);
3229
3230         queue_work(hdev->workqueue, &hdev->tx_work);
3231 }
3232
3233 /* Send SCO data */
3234 void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
3235 {
3236         struct hci_dev *hdev = conn->hdev;
3237         struct hci_sco_hdr hdr;
3238
3239         BT_DBG("%s len %d", hdev->name, skb->len);
3240
3241         hdr.handle = cpu_to_le16(conn->handle);
3242         hdr.dlen   = skb->len;
3243
3244         skb_push(skb, HCI_SCO_HDR_SIZE);
3245         skb_reset_transport_header(skb);
3246         memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
3247
3248         hci_skb_pkt_type(skb) = HCI_SCODATA_PKT;
3249
3250         skb_queue_tail(&conn->data_q, skb);
3251         queue_work(hdev->workqueue, &hdev->tx_work);
3252 }
3253
3254 /* Send ISO data */
3255 static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags)
3256 {
3257         struct hci_iso_hdr *hdr;
3258         int len = skb->len;
3259
3260         skb_push(skb, HCI_ISO_HDR_SIZE);
3261         skb_reset_transport_header(skb);
3262         hdr = (struct hci_iso_hdr *)skb_transport_header(skb);
3263         hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
3264         hdr->dlen   = cpu_to_le16(len);
3265 }
3266
3267 static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue,
3268                           struct sk_buff *skb)
3269 {
3270         struct hci_dev *hdev = conn->hdev;
3271         struct sk_buff *list;
3272         __u16 flags;
3273
3274         skb->len = skb_headlen(skb);
3275         skb->data_len = 0;
3276
3277         hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3278
3279         list = skb_shinfo(skb)->frag_list;
3280
3281         flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00);
3282         hci_add_iso_hdr(skb, conn->handle, flags);
3283
3284         if (!list) {
3285                 /* Non fragmented */
3286                 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
3287
3288                 skb_queue_tail(queue, skb);
3289         } else {
3290                 /* Fragmented */
3291                 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3292
3293                 skb_shinfo(skb)->frag_list = NULL;
3294
3295                 __skb_queue_tail(queue, skb);
3296
3297                 do {
3298                         skb = list; list = list->next;
3299
3300                         hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
3301                         flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END,
3302                                                    0x00);
3303                         hci_add_iso_hdr(skb, conn->handle, flags);
3304
3305                         BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
3306
3307                         __skb_queue_tail(queue, skb);
3308                 } while (list);
3309         }
3310 }
3311
3312 void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb)
3313 {
3314         struct hci_dev *hdev = conn->hdev;
3315
3316         BT_DBG("%s len %d", hdev->name, skb->len);
3317
3318         hci_queue_iso(conn, &conn->data_q, skb);
3319
3320         queue_work(hdev->workqueue, &hdev->tx_work);
3321 }
3322
3323 /* ---- HCI TX task (outgoing data) ---- */
3324
3325 /* HCI Connection scheduler */
3326 static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote)
3327 {
3328         struct hci_dev *hdev;
3329         int cnt, q;
3330
3331         if (!conn) {
3332                 *quote = 0;
3333                 return;
3334         }
3335
3336         hdev = conn->hdev;
3337
3338         switch (conn->type) {
3339         case ACL_LINK:
3340                 cnt = hdev->acl_cnt;
3341                 break;
3342         case AMP_LINK:
3343                 cnt = hdev->block_cnt;
3344                 break;
3345         case SCO_LINK:
3346         case ESCO_LINK:
3347                 cnt = hdev->sco_cnt;
3348                 break;
3349         case LE_LINK:
3350                 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3351                 break;
3352         case ISO_LINK:
3353                 cnt = hdev->iso_mtu ? hdev->iso_cnt :
3354                         hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
3355                 break;
3356         default:
3357                 cnt = 0;
3358                 bt_dev_err(hdev, "unknown link type %d", conn->type);
3359         }
3360
3361         q = cnt / num;
3362         *quote = q ? q : 1;
3363 }
3364
3365 static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type,
3366                                      int *quote)
3367 {
3368         struct hci_conn_hash *h = &hdev->conn_hash;
3369         struct hci_conn *conn = NULL, *c;
3370         unsigned int num = 0, min = ~0;
3371
3372         /* We don't have to lock device here. Connections are always
3373          * added and removed with TX task disabled. */
3374
3375         rcu_read_lock();
3376
3377         list_for_each_entry_rcu(c, &h->list, list) {
3378                 if (c->type != type || skb_queue_empty(&c->data_q))
3379                         continue;
3380
3381                 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
3382                         continue;
3383
3384                 num++;
3385
3386                 if (c->sent < min) {
3387                         min  = c->sent;
3388                         conn = c;
3389                 }
3390
3391                 if (hci_conn_num(hdev, type) == num)
3392                         break;
3393         }
3394
3395         rcu_read_unlock();
3396
3397         hci_quote_sent(conn, num, quote);
3398
3399         BT_DBG("conn %p quote %d", conn, *quote);
3400         return conn;
3401 }
3402
3403 static void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
3404 {
3405         struct hci_conn_hash *h = &hdev->conn_hash;
3406         struct hci_conn *c;
3407
3408         bt_dev_err(hdev, "link tx timeout");
3409
3410         rcu_read_lock();
3411
3412         /* Kill stalled connections */
3413         list_for_each_entry_rcu(c, &h->list, list) {
3414                 if (c->type == type && c->sent) {
3415                         bt_dev_err(hdev, "killing stalled connection %pMR",
3416                                    &c->dst);
3417                         hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM);
3418                 }
3419         }
3420
3421         rcu_read_unlock();
3422 }
3423
3424 static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
3425                                       int *quote)
3426 {
3427         struct hci_conn_hash *h = &hdev->conn_hash;
3428         struct hci_chan *chan = NULL;
3429         unsigned int num = 0, min = ~0, cur_prio = 0;
3430         struct hci_conn *conn;
3431         int conn_num = 0;
3432
3433         BT_DBG("%s", hdev->name);
3434
3435         rcu_read_lock();
3436
3437         list_for_each_entry_rcu(conn, &h->list, list) {
3438                 struct hci_chan *tmp;
3439
3440                 if (conn->type != type)
3441                         continue;
3442
3443                 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3444                         continue;
3445
3446                 conn_num++;
3447
3448                 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
3449                         struct sk_buff *skb;
3450
3451                         if (skb_queue_empty(&tmp->data_q))
3452                                 continue;
3453
3454                         skb = skb_peek(&tmp->data_q);
3455                         if (skb->priority < cur_prio)
3456                                 continue;
3457
3458                         if (skb->priority > cur_prio) {
3459                                 num = 0;
3460                                 min = ~0;
3461                                 cur_prio = skb->priority;
3462                         }
3463
3464                         num++;
3465
3466                         if (conn->sent < min) {
3467                                 min  = conn->sent;
3468                                 chan = tmp;
3469                         }
3470                 }
3471
3472                 if (hci_conn_num(hdev, type) == conn_num)
3473                         break;
3474         }
3475
3476         rcu_read_unlock();
3477
3478         if (!chan)
3479                 return NULL;
3480
3481         hci_quote_sent(chan->conn, num, quote);
3482
3483         BT_DBG("chan %p quote %d", chan, *quote);
3484         return chan;
3485 }
3486
3487 static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
3488 {
3489         struct hci_conn_hash *h = &hdev->conn_hash;
3490         struct hci_conn *conn;
3491         int num = 0;
3492
3493         BT_DBG("%s", hdev->name);
3494
3495         rcu_read_lock();
3496
3497         list_for_each_entry_rcu(conn, &h->list, list) {
3498                 struct hci_chan *chan;
3499
3500                 if (conn->type != type)
3501                         continue;
3502
3503                 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
3504                         continue;
3505
3506                 num++;
3507
3508                 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
3509                         struct sk_buff *skb;
3510
3511                         if (chan->sent) {
3512                                 chan->sent = 0;
3513                                 continue;
3514                         }
3515
3516                         if (skb_queue_empty(&chan->data_q))
3517                                 continue;
3518
3519                         skb = skb_peek(&chan->data_q);
3520                         if (skb->priority >= HCI_PRIO_MAX - 1)
3521                                 continue;
3522
3523                         skb->priority = HCI_PRIO_MAX - 1;
3524
3525                         BT_DBG("chan %p skb %p promoted to %d", chan, skb,
3526                                skb->priority);
3527                 }
3528
3529                 if (hci_conn_num(hdev, type) == num)
3530                         break;
3531         }
3532
3533         rcu_read_unlock();
3534
3535 }
3536
3537 static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
3538 {
3539         /* Calculate count of blocks used by this packet */
3540         return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
3541 }
3542
3543 static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
3544 {
3545         unsigned long last_tx;
3546
3547         if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
3548                 return;
3549
3550         switch (type) {
3551         case LE_LINK:
3552                 last_tx = hdev->le_last_tx;
3553                 break;
3554         default:
3555                 last_tx = hdev->acl_last_tx;
3556                 break;
3557         }
3558
3559         /* tx timeout must be longer than maximum link supervision timeout
3560          * (40.9 seconds)
3561          */
3562         if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
3563                 hci_link_tx_to(hdev, type);
3564 }
3565
3566 /* Schedule SCO */
3567 static void hci_sched_sco(struct hci_dev *hdev)
3568 {
3569         struct hci_conn *conn;
3570         struct sk_buff *skb;
3571         int quote;
3572
3573         BT_DBG("%s", hdev->name);
3574
3575         if (!hci_conn_num(hdev, SCO_LINK))
3576                 return;
3577
3578         while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
3579                 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3580                         BT_DBG("skb %p len %d", skb, skb->len);
3581                         hci_send_frame(hdev, skb);
3582
3583                         conn->sent++;
3584                         if (conn->sent == ~0)
3585                                 conn->sent = 0;
3586                 }
3587         }
3588 }
3589
3590 static void hci_sched_esco(struct hci_dev *hdev)
3591 {
3592         struct hci_conn *conn;
3593         struct sk_buff *skb;
3594         int quote;
3595
3596         BT_DBG("%s", hdev->name);
3597
3598         if (!hci_conn_num(hdev, ESCO_LINK))
3599                 return;
3600
3601         while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK,
3602                                                      &quote))) {
3603                 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3604                         BT_DBG("skb %p len %d", skb, skb->len);
3605                         hci_send_frame(hdev, skb);
3606
3607                         conn->sent++;
3608                         if (conn->sent == ~0)
3609                                 conn->sent = 0;
3610                 }
3611         }
3612 }
3613
3614 static void hci_sched_acl_pkt(struct hci_dev *hdev)
3615 {
3616         unsigned int cnt = hdev->acl_cnt;
3617         struct hci_chan *chan;
3618         struct sk_buff *skb;
3619         int quote;
3620
3621         __check_timeout(hdev, cnt, ACL_LINK);
3622
3623         while (hdev->acl_cnt &&
3624                (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
3625                 u32 priority = (skb_peek(&chan->data_q))->priority;
3626                 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3627                         BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3628                                skb->len, skb->priority);
3629
3630                         /* Stop if priority has changed */
3631                         if (skb->priority < priority)
3632                                 break;
3633
3634                         skb = skb_dequeue(&chan->data_q);
3635
3636                         hci_conn_enter_active_mode(chan->conn,
3637                                                    bt_cb(skb)->force_active);
3638
3639                         hci_send_frame(hdev, skb);
3640                         hdev->acl_last_tx = jiffies;
3641
3642                         hdev->acl_cnt--;
3643                         chan->sent++;
3644                         chan->conn->sent++;
3645
3646                         /* Send pending SCO packets right away */
3647                         hci_sched_sco(hdev);
3648                         hci_sched_esco(hdev);
3649                 }
3650         }
3651
3652         if (cnt != hdev->acl_cnt)
3653                 hci_prio_recalculate(hdev, ACL_LINK);
3654 }
3655
3656 static void hci_sched_acl_blk(struct hci_dev *hdev)
3657 {
3658         unsigned int cnt = hdev->block_cnt;
3659         struct hci_chan *chan;
3660         struct sk_buff *skb;
3661         int quote;
3662         u8 type;
3663
3664         BT_DBG("%s", hdev->name);
3665
3666         if (hdev->dev_type == HCI_AMP)
3667                 type = AMP_LINK;
3668         else
3669                 type = ACL_LINK;
3670
3671         __check_timeout(hdev, cnt, type);
3672
3673         while (hdev->block_cnt > 0 &&
3674                (chan = hci_chan_sent(hdev, type, &quote))) {
3675                 u32 priority = (skb_peek(&chan->data_q))->priority;
3676                 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
3677                         int blocks;
3678
3679                         BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3680                                skb->len, skb->priority);
3681
3682                         /* Stop if priority has changed */
3683                         if (skb->priority < priority)
3684                                 break;
3685
3686                         skb = skb_dequeue(&chan->data_q);
3687
3688                         blocks = __get_blocks(hdev, skb);
3689                         if (blocks > hdev->block_cnt)
3690                                 return;
3691
3692                         hci_conn_enter_active_mode(chan->conn,
3693                                                    bt_cb(skb)->force_active);
3694
3695                         hci_send_frame(hdev, skb);
3696                         hdev->acl_last_tx = jiffies;
3697
3698                         hdev->block_cnt -= blocks;
3699                         quote -= blocks;
3700
3701                         chan->sent += blocks;
3702                         chan->conn->sent += blocks;
3703                 }
3704         }
3705
3706         if (cnt != hdev->block_cnt)
3707                 hci_prio_recalculate(hdev, type);
3708 }
3709
3710 static void hci_sched_acl(struct hci_dev *hdev)
3711 {
3712         BT_DBG("%s", hdev->name);
3713
3714         /* No ACL link over BR/EDR controller */
3715         if (!hci_conn_num(hdev, ACL_LINK) && hdev->dev_type == HCI_PRIMARY)
3716                 return;
3717
3718         /* No AMP link over AMP controller */
3719         if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP)
3720                 return;
3721
3722         switch (hdev->flow_ctl_mode) {
3723         case HCI_FLOW_CTL_MODE_PACKET_BASED:
3724                 hci_sched_acl_pkt(hdev);
3725                 break;
3726
3727         case HCI_FLOW_CTL_MODE_BLOCK_BASED:
3728                 hci_sched_acl_blk(hdev);
3729                 break;
3730         }
3731 }
3732
3733 static void hci_sched_le(struct hci_dev *hdev)
3734 {
3735         struct hci_chan *chan;
3736         struct sk_buff *skb;
3737         int quote, cnt, tmp;
3738
3739         BT_DBG("%s", hdev->name);
3740
3741         if (!hci_conn_num(hdev, LE_LINK))
3742                 return;
3743
3744         cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
3745
3746         __check_timeout(hdev, cnt, LE_LINK);
3747
3748         tmp = cnt;
3749         while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
3750                 u32 priority = (skb_peek(&chan->data_q))->priority;
3751                 while (quote-- && (skb = skb_peek(&chan->data_q))) {
3752                         BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
3753                                skb->len, skb->priority);
3754
3755                         /* Stop if priority has changed */
3756                         if (skb->priority < priority)
3757                                 break;
3758
3759                         skb = skb_dequeue(&chan->data_q);
3760
3761                         hci_send_frame(hdev, skb);
3762                         hdev->le_last_tx = jiffies;
3763
3764                         cnt--;
3765                         chan->sent++;
3766                         chan->conn->sent++;
3767
3768                         /* Send pending SCO packets right away */
3769                         hci_sched_sco(hdev);
3770                         hci_sched_esco(hdev);
3771                 }
3772         }
3773
3774         if (hdev->le_pkts)
3775                 hdev->le_cnt = cnt;
3776         else
3777                 hdev->acl_cnt = cnt;
3778
3779         if (cnt != tmp)
3780                 hci_prio_recalculate(hdev, LE_LINK);
3781 }
3782
3783 /* Schedule CIS */
3784 static void hci_sched_iso(struct hci_dev *hdev)
3785 {
3786         struct hci_conn *conn;
3787         struct sk_buff *skb;
3788         int quote, *cnt;
3789
3790         BT_DBG("%s", hdev->name);
3791
3792         if (!hci_conn_num(hdev, ISO_LINK))
3793                 return;
3794
3795         cnt = hdev->iso_pkts ? &hdev->iso_cnt :
3796                 hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
3797         while (*cnt && (conn = hci_low_sent(hdev, ISO_LINK, &quote))) {
3798                 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
3799                         BT_DBG("skb %p len %d", skb, skb->len);
3800                         hci_send_frame(hdev, skb);
3801
3802                         conn->sent++;
3803                         if (conn->sent == ~0)
3804                                 conn->sent = 0;
3805                         (*cnt)--;
3806                 }
3807         }
3808 }
3809
3810 static void hci_tx_work(struct work_struct *work)
3811 {
3812         struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
3813         struct sk_buff *skb;
3814
3815         BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt,
3816                hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt);
3817
3818         if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
3819                 /* Schedule queues and send stuff to HCI driver */
3820                 hci_sched_sco(hdev);
3821                 hci_sched_esco(hdev);
3822                 hci_sched_iso(hdev);
3823                 hci_sched_acl(hdev);
3824                 hci_sched_le(hdev);
3825         }
3826
3827         /* Send next queued raw (unknown type) packet */
3828         while ((skb = skb_dequeue(&hdev->raw_q)))
3829                 hci_send_frame(hdev, skb);
3830 }
3831
3832 /* ----- HCI RX task (incoming data processing) ----- */
3833
3834 /* ACL data packet */
3835 static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3836 {
3837         struct hci_acl_hdr *hdr = (void *) skb->data;
3838         struct hci_conn *conn;
3839         __u16 handle, flags;
3840
3841         skb_pull(skb, HCI_ACL_HDR_SIZE);
3842
3843         handle = __le16_to_cpu(hdr->handle);
3844         flags  = hci_flags(handle);
3845         handle = hci_handle(handle);
3846
3847         BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3848                handle, flags);
3849
3850         hdev->stat.acl_rx++;
3851
3852         hci_dev_lock(hdev);
3853         conn = hci_conn_hash_lookup_handle(hdev, handle);
3854         hci_dev_unlock(hdev);
3855
3856         if (conn) {
3857                 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
3858
3859                 /* Send to upper protocol */
3860                 l2cap_recv_acldata(conn, skb, flags);
3861                 return;
3862         } else {
3863                 bt_dev_err(hdev, "ACL packet for unknown connection handle %d",
3864                            handle);
3865         }
3866
3867         kfree_skb(skb);
3868 }
3869
3870 /* SCO data packet */
3871 static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3872 {
3873         struct hci_sco_hdr *hdr = (void *) skb->data;
3874         struct hci_conn *conn;
3875         __u16 handle, flags;
3876
3877         skb_pull(skb, HCI_SCO_HDR_SIZE);
3878
3879         handle = __le16_to_cpu(hdr->handle);
3880         flags  = hci_flags(handle);
3881         handle = hci_handle(handle);
3882
3883         BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len,
3884                handle, flags);
3885
3886         hdev->stat.sco_rx++;
3887
3888         hci_dev_lock(hdev);
3889         conn = hci_conn_hash_lookup_handle(hdev, handle);
3890         hci_dev_unlock(hdev);
3891
3892         if (conn) {
3893                 /* Send to upper protocol */
3894                 bt_cb(skb)->sco.pkt_status = flags & 0x03;
3895                 sco_recv_scodata(conn, skb);
3896                 return;
3897         } else {
3898                 bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d",
3899                                        handle);
3900         }
3901
3902         kfree_skb(skb);
3903 }
3904
3905 static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
3906 {
3907         struct hci_iso_hdr *hdr;
3908         struct hci_conn *conn;
3909         __u16 handle, flags;
3910
3911         hdr = skb_pull_data(skb, sizeof(*hdr));
3912         if (!hdr) {
3913                 bt_dev_err(hdev, "ISO packet too small");
3914                 goto drop;
3915         }
3916
3917         handle = __le16_to_cpu(hdr->handle);
3918         flags  = hci_flags(handle);
3919         handle = hci_handle(handle);
3920
3921         bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len,
3922                    handle, flags);
3923
3924         hci_dev_lock(hdev);
3925         conn = hci_conn_hash_lookup_handle(hdev, handle);
3926         hci_dev_unlock(hdev);
3927
3928         if (!conn) {
3929                 bt_dev_err(hdev, "ISO packet for unknown connection handle %d",
3930                            handle);
3931                 goto drop;
3932         }
3933
3934         /* Send to upper protocol */
3935         iso_recv(conn, skb, flags);
3936         return;
3937
3938 drop:
3939         kfree_skb(skb);
3940 }
3941
3942 static bool hci_req_is_complete(struct hci_dev *hdev)
3943 {
3944         struct sk_buff *skb;
3945
3946         skb = skb_peek(&hdev->cmd_q);
3947         if (!skb)
3948                 return true;
3949
3950         return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
3951 }
3952
3953 static void hci_resend_last(struct hci_dev *hdev)
3954 {
3955         struct hci_command_hdr *sent;
3956         struct sk_buff *skb;
3957         u16 opcode;
3958
3959         if (!hdev->sent_cmd)
3960                 return;
3961
3962         sent = (void *) hdev->sent_cmd->data;
3963         opcode = __le16_to_cpu(sent->opcode);
3964         if (opcode == HCI_OP_RESET)
3965                 return;
3966
3967         skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
3968         if (!skb)
3969                 return;
3970
3971         skb_queue_head(&hdev->cmd_q, skb);
3972         queue_work(hdev->workqueue, &hdev->cmd_work);
3973 }
3974
3975 void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
3976                           hci_req_complete_t *req_complete,
3977                           hci_req_complete_skb_t *req_complete_skb)
3978 {
3979         struct sk_buff *skb;
3980         unsigned long flags;
3981
3982         BT_DBG("opcode 0x%04x status 0x%02x", opcode, status);
3983
3984         /* If the completed command doesn't match the last one that was
3985          * sent we need to do special handling of it.
3986          */
3987         if (!hci_sent_cmd_data(hdev, opcode)) {
3988                 /* Some CSR based controllers generate a spontaneous
3989                  * reset complete event during init and any pending
3990                  * command will never be completed. In such a case we
3991                  * need to resend whatever was the last sent
3992                  * command.
3993                  */
3994                 if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
3995                         hci_resend_last(hdev);
3996
3997                 return;
3998         }
3999
4000         /* If we reach this point this event matches the last command sent */
4001         hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
4002
4003         /* If the command succeeded and there's still more commands in
4004          * this request the request is not yet complete.
4005          */
4006         if (!status && !hci_req_is_complete(hdev))
4007                 return;
4008
4009         /* If this was the last command in a request the complete
4010          * callback would be found in hdev->sent_cmd instead of the
4011          * command queue (hdev->cmd_q).
4012          */
4013         if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) {
4014                 *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb;
4015                 return;
4016         }
4017
4018         if (bt_cb(hdev->sent_cmd)->hci.req_complete) {
4019                 *req_complete = bt_cb(hdev->sent_cmd)->hci.req_complete;
4020                 return;
4021         }
4022
4023         /* Remove all pending commands belonging to this request */
4024         spin_lock_irqsave(&hdev->cmd_q.lock, flags);
4025         while ((skb = __skb_dequeue(&hdev->cmd_q))) {
4026                 if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
4027                         __skb_queue_head(&hdev->cmd_q, skb);
4028                         break;
4029                 }
4030
4031                 if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
4032                         *req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
4033                 else
4034                         *req_complete = bt_cb(skb)->hci.req_complete;
4035                 dev_kfree_skb_irq(skb);
4036         }
4037         spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
4038 }
4039
4040 static void hci_rx_work(struct work_struct *work)
4041 {
4042         struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
4043         struct sk_buff *skb;
4044
4045         BT_DBG("%s", hdev->name);
4046
4047         /* The kcov_remote functions used for collecting packet parsing
4048          * coverage information from this background thread and associate
4049          * the coverage with the syscall's thread which originally injected
4050          * the packet. This helps fuzzing the kernel.
4051          */
4052         for (; (skb = skb_dequeue(&hdev->rx_q)); kcov_remote_stop()) {
4053                 kcov_remote_start_common(skb_get_kcov_handle(skb));
4054
4055                 /* Send copy to monitor */
4056                 hci_send_to_monitor(hdev, skb);
4057
4058                 if (atomic_read(&hdev->promisc)) {
4059                         /* Send copy to the sockets */
4060                         hci_send_to_sock(hdev, skb);
4061                 }
4062
4063                 /* If the device has been opened in HCI_USER_CHANNEL,
4064                  * the userspace has exclusive access to device.
4065                  * When device is HCI_INIT, we still need to process
4066                  * the data packets to the driver in order
4067                  * to complete its setup().
4068                  */
4069                 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
4070                     !test_bit(HCI_INIT, &hdev->flags)) {
4071                         kfree_skb(skb);
4072                         continue;
4073                 }
4074
4075                 if (test_bit(HCI_INIT, &hdev->flags)) {
4076                         /* Don't process data packets in this states. */
4077                         switch (hci_skb_pkt_type(skb)) {
4078                         case HCI_ACLDATA_PKT:
4079                         case HCI_SCODATA_PKT:
4080                         case HCI_ISODATA_PKT:
4081                                 kfree_skb(skb);
4082                                 continue;
4083                         }
4084                 }
4085
4086                 /* Process frame */
4087                 switch (hci_skb_pkt_type(skb)) {
4088                 case HCI_EVENT_PKT:
4089                         BT_DBG("%s Event packet", hdev->name);
4090                         hci_event_packet(hdev, skb);
4091                         break;
4092
4093                 case HCI_ACLDATA_PKT:
4094                         BT_DBG("%s ACL data packet", hdev->name);
4095                         hci_acldata_packet(hdev, skb);
4096                         break;
4097
4098                 case HCI_SCODATA_PKT:
4099                         BT_DBG("%s SCO data packet", hdev->name);
4100                         hci_scodata_packet(hdev, skb);
4101                         break;
4102
4103                 case HCI_ISODATA_PKT:
4104                         BT_DBG("%s ISO data packet", hdev->name);
4105                         hci_isodata_packet(hdev, skb);
4106                         break;
4107
4108                 default:
4109                         kfree_skb(skb);
4110                         break;
4111                 }
4112         }
4113 }
4114
4115 static void hci_cmd_work(struct work_struct *work)
4116 {
4117         struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
4118         struct sk_buff *skb;
4119
4120         BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name,
4121                atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
4122
4123         /* Send queued commands */
4124         if (atomic_read(&hdev->cmd_cnt)) {
4125                 skb = skb_dequeue(&hdev->cmd_q);
4126                 if (!skb)
4127                         return;
4128
4129                 kfree_skb(hdev->sent_cmd);
4130
4131                 hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
4132                 if (hdev->sent_cmd) {
4133                         int res;
4134                         if (hci_req_status_pend(hdev))
4135                                 hci_dev_set_flag(hdev, HCI_CMD_PENDING);
4136                         atomic_dec(&hdev->cmd_cnt);
4137
4138                         res = hci_send_frame(hdev, skb);
4139                         if (res < 0)
4140                                 __hci_cmd_sync_cancel(hdev, -res);
4141
4142                         rcu_read_lock();
4143                         if (test_bit(HCI_RESET, &hdev->flags) ||
4144                             hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
4145                                 cancel_delayed_work(&hdev->cmd_timer);
4146                         else
4147                                 queue_delayed_work(hdev->workqueue, &hdev->cmd_timer,
4148                                                    HCI_CMD_TIMEOUT);
4149                         rcu_read_unlock();
4150                 } else {
4151                         skb_queue_head(&hdev->cmd_q, skb);
4152                         queue_work(hdev->workqueue, &hdev->cmd_work);
4153                 }
4154         }
4155 }