| /* |
| BlueZ - Bluetooth protocol stack for Linux |
| Copyright (C) 2000-2001 Qualcomm Incorporated |
| Copyright (C) 2011 ProFUSION Embedded Systems |
| |
| Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License version 2 as |
| published by the Free Software Foundation; |
| |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
| CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| |
| ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
| SOFTWARE IS DISCLAIMED. |
| */ |
| |
| /* Bluetooth HCI core. */ |
| |
| #include <linux/export.h> |
| #include <linux/rfkill.h> |
| #include <linux/debugfs.h> |
| #include <linux/crypto.h> |
| #include <linux/kcov.h> |
| #include <linux/property.h> |
| #include <linux/suspend.h> |
| #include <linux/wait.h> |
| #include <asm/unaligned.h> |
| |
| #include <net/bluetooth/bluetooth.h> |
| #include <net/bluetooth/hci_core.h> |
| #include <net/bluetooth/l2cap.h> |
| #include <net/bluetooth/mgmt.h> |
| |
| #include "hci_request.h" |
| #include "hci_debugfs.h" |
| #include "smp.h" |
| #include "leds.h" |
| #include "msft.h" |
| #include "aosp.h" |
| #include "hci_codec.h" |
| |
| static void hci_rx_work(struct work_struct *work); |
| static void hci_cmd_work(struct work_struct *work); |
| static void hci_tx_work(struct work_struct *work); |
| |
| /* HCI device list */ |
| LIST_HEAD(hci_dev_list); |
| DEFINE_RWLOCK(hci_dev_list_lock); |
| |
| /* HCI callback list */ |
| LIST_HEAD(hci_cb_list); |
| DEFINE_MUTEX(hci_cb_list_lock); |
| |
| /* HCI ID Numbering */ |
| static DEFINE_IDA(hci_index_ida); |
| |
| static int hci_scan_req(struct hci_request *req, unsigned long opt) |
| { |
| __u8 scan = opt; |
| |
| BT_DBG("%s %x", req->hdev->name, scan); |
| |
| /* Inquiry and Page scans */ |
| hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
| return 0; |
| } |
| |
| static int hci_auth_req(struct hci_request *req, unsigned long opt) |
| { |
| __u8 auth = opt; |
| |
| BT_DBG("%s %x", req->hdev->name, auth); |
| |
| /* Authentication */ |
| hci_req_add(req, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
| return 0; |
| } |
| |
| static int hci_encrypt_req(struct hci_request *req, unsigned long opt) |
| { |
| __u8 encrypt = opt; |
| |
| BT_DBG("%s %x", req->hdev->name, encrypt); |
| |
| /* Encryption */ |
| hci_req_add(req, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
| return 0; |
| } |
| |
| static int hci_linkpol_req(struct hci_request *req, unsigned long opt) |
| { |
| __le16 policy = cpu_to_le16(opt); |
| |
| BT_DBG("%s %x", req->hdev->name, policy); |
| |
| /* Default link policy */ |
| hci_req_add(req, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); |
| return 0; |
| } |
| |
| /* Get HCI device by index. |
| * Device is held on return. */ |
| struct hci_dev *hci_dev_get(int index) |
| { |
| struct hci_dev *hdev = NULL, *d; |
| |
| BT_DBG("%d", index); |
| |
| if (index < 0) |
| return NULL; |
| |
| read_lock(&hci_dev_list_lock); |
| list_for_each_entry(d, &hci_dev_list, list) { |
| if (d->id == index) { |
| hdev = hci_dev_hold(d); |
| break; |
| } |
| } |
| read_unlock(&hci_dev_list_lock); |
| return hdev; |
| } |
| |
| /* ---- Inquiry support ---- */ |
| |
| bool hci_discovery_active(struct hci_dev *hdev) |
| { |
| struct discovery_state *discov = &hdev->discovery; |
| |
| switch (discov->state) { |
| case DISCOVERY_FINDING: |
| case DISCOVERY_RESOLVING: |
| return true; |
| |
| default: |
| return false; |
| } |
| } |
| |
| void hci_discovery_set_state(struct hci_dev *hdev, int state) |
| { |
| int old_state = hdev->discovery.state; |
| |
| if (old_state == state) |
| return; |
| |
| hdev->discovery.state = state; |
| |
| switch (state) { |
| case DISCOVERY_STOPPED: |
| hci_update_passive_scan(hdev); |
| |
| if (old_state != DISCOVERY_STARTING) |
| mgmt_discovering(hdev, 0); |
| break; |
| case DISCOVERY_STARTING: |
| break; |
| case DISCOVERY_FINDING: |
| /* If discovery was not started then it was initiated by the |
| * MGMT interface so no MGMT event shall be generated either |
| */ |
| if (old_state != DISCOVERY_STARTING) { |
| hdev->discovery.state = old_state; |
| return; |
| } |
| mgmt_discovering(hdev, 1); |
| break; |
| case DISCOVERY_RESOLVING: |
| break; |
| case DISCOVERY_STOPPING: |
| break; |
| } |
| |
| bt_dev_dbg(hdev, "state %u -> %u", old_state, state); |
| } |
| |
| void hci_inquiry_cache_flush(struct hci_dev *hdev) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *p, *n; |
| |
| list_for_each_entry_safe(p, n, &cache->all, all) { |
| list_del(&p->all); |
| kfree(p); |
| } |
| |
| INIT_LIST_HEAD(&cache->unknown); |
| INIT_LIST_HEAD(&cache->resolve); |
| } |
| |
| struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, |
| bdaddr_t *bdaddr) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *e; |
| |
| BT_DBG("cache %p, %pMR", cache, bdaddr); |
| |
| list_for_each_entry(e, &cache->all, all) { |
| if (!bacmp(&e->data.bdaddr, bdaddr)) |
| return e; |
| } |
| |
| return NULL; |
| } |
| |
| struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev, |
| bdaddr_t *bdaddr) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *e; |
| |
| BT_DBG("cache %p, %pMR", cache, bdaddr); |
| |
| list_for_each_entry(e, &cache->unknown, list) { |
| if (!bacmp(&e->data.bdaddr, bdaddr)) |
| return e; |
| } |
| |
| return NULL; |
| } |
| |
| struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev, |
| bdaddr_t *bdaddr, |
| int state) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *e; |
| |
| BT_DBG("cache %p bdaddr %pMR state %d", cache, bdaddr, state); |
| |
| list_for_each_entry(e, &cache->resolve, list) { |
| if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state) |
| return e; |
| if (!bacmp(&e->data.bdaddr, bdaddr)) |
| return e; |
| } |
| |
| return NULL; |
| } |
| |
| void hci_inquiry_cache_update_resolve(struct hci_dev *hdev, |
| struct inquiry_entry *ie) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct list_head *pos = &cache->resolve; |
| struct inquiry_entry *p; |
| |
| list_del(&ie->list); |
| |
| list_for_each_entry(p, &cache->resolve, list) { |
| if (p->name_state != NAME_PENDING && |
| abs(p->data.rssi) >= abs(ie->data.rssi)) |
| break; |
| pos = &p->list; |
| } |
| |
| list_add(&ie->list, pos); |
| } |
| |
| u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data, |
| bool name_known) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_entry *ie; |
| u32 flags = 0; |
| |
| BT_DBG("cache %p, %pMR", cache, &data->bdaddr); |
| |
| hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR); |
| |
| if (!data->ssp_mode) |
| flags |= MGMT_DEV_FOUND_LEGACY_PAIRING; |
| |
| ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr); |
| if (ie) { |
| if (!ie->data.ssp_mode) |
| flags |= MGMT_DEV_FOUND_LEGACY_PAIRING; |
| |
| if (ie->name_state == NAME_NEEDED && |
| data->rssi != ie->data.rssi) { |
| ie->data.rssi = data->rssi; |
| hci_inquiry_cache_update_resolve(hdev, ie); |
| } |
| |
| goto update; |
| } |
| |
| /* Entry not in the cache. Add new one. */ |
| ie = kzalloc(sizeof(*ie), GFP_KERNEL); |
| if (!ie) { |
| flags |= MGMT_DEV_FOUND_CONFIRM_NAME; |
| goto done; |
| } |
| |
| list_add(&ie->all, &cache->all); |
| |
| if (name_known) { |
| ie->name_state = NAME_KNOWN; |
| } else { |
| ie->name_state = NAME_NOT_KNOWN; |
| list_add(&ie->list, &cache->unknown); |
| } |
| |
| update: |
| if (name_known && ie->name_state != NAME_KNOWN && |
| ie->name_state != NAME_PENDING) { |
| ie->name_state = NAME_KNOWN; |
| list_del(&ie->list); |
| } |
| |
| memcpy(&ie->data, data, sizeof(*data)); |
| ie->timestamp = jiffies; |
| cache->timestamp = jiffies; |
| |
| if (ie->name_state == NAME_NOT_KNOWN) |
| flags |= MGMT_DEV_FOUND_CONFIRM_NAME; |
| |
| done: |
| return flags; |
| } |
| |
| static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) |
| { |
| struct discovery_state *cache = &hdev->discovery; |
| struct inquiry_info *info = (struct inquiry_info *) buf; |
| struct inquiry_entry *e; |
| int copied = 0; |
| |
| list_for_each_entry(e, &cache->all, all) { |
| struct inquiry_data *data = &e->data; |
| |
| if (copied >= num) |
| break; |
| |
| bacpy(&info->bdaddr, &data->bdaddr); |
| info->pscan_rep_mode = data->pscan_rep_mode; |
| info->pscan_period_mode = data->pscan_period_mode; |
| info->pscan_mode = data->pscan_mode; |
| memcpy(info->dev_class, data->dev_class, 3); |
| info->clock_offset = data->clock_offset; |
| |
| info++; |
| copied++; |
| } |
| |
| BT_DBG("cache %p, copied %d", cache, copied); |
| return copied; |
| } |
| |
| static int hci_inq_req(struct hci_request *req, unsigned long opt) |
| { |
| struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; |
| struct hci_dev *hdev = req->hdev; |
| struct hci_cp_inquiry cp; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (test_bit(HCI_INQUIRY, &hdev->flags)) |
| return 0; |
| |
| /* Start Inquiry */ |
| memcpy(&cp.lap, &ir->lap, 3); |
| cp.length = ir->length; |
| cp.num_rsp = ir->num_rsp; |
| hci_req_add(req, HCI_OP_INQUIRY, sizeof(cp), &cp); |
| |
| return 0; |
| } |
| |
| int hci_inquiry(void __user *arg) |
| { |
| __u8 __user *ptr = arg; |
| struct hci_inquiry_req ir; |
| struct hci_dev *hdev; |
| int err = 0, do_inquiry = 0, max_rsp; |
| long timeo; |
| __u8 *buf; |
| |
| if (copy_from_user(&ir, ptr, sizeof(ir))) |
| return -EFAULT; |
| |
| hdev = hci_dev_get(ir.dev_id); |
| if (!hdev) |
| return -ENODEV; |
| |
| if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
| err = -EBUSY; |
| goto done; |
| } |
| |
| if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { |
| err = -EOPNOTSUPP; |
| goto done; |
| } |
| |
| if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { |
| err = -EOPNOTSUPP; |
| goto done; |
| } |
| |
| /* Restrict maximum inquiry length to 60 seconds */ |
| if (ir.length > 60) { |
| err = -EINVAL; |
| goto done; |
| } |
| |
| hci_dev_lock(hdev); |
| if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
| inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) { |
| hci_inquiry_cache_flush(hdev); |
| do_inquiry = 1; |
| } |
| hci_dev_unlock(hdev); |
| |
| timeo = ir.length * msecs_to_jiffies(2000); |
| |
| if (do_inquiry) { |
| err = hci_req_sync(hdev, hci_inq_req, (unsigned long) &ir, |
| timeo, NULL); |
| if (err < 0) |
| goto done; |
| |
| /* Wait until Inquiry procedure finishes (HCI_INQUIRY flag is |
| * cleared). If it is interrupted by a signal, return -EINTR. |
| */ |
| if (wait_on_bit(&hdev->flags, HCI_INQUIRY, |
| TASK_INTERRUPTIBLE)) { |
| err = -EINTR; |
| goto done; |
| } |
| } |
| |
| /* for unlimited number of responses we will use buffer with |
| * 255 entries |
| */ |
| max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; |
| |
| /* cache_dump can't sleep. Therefore we allocate temp buffer and then |
| * copy it to the user space. |
| */ |
| buf = kmalloc_array(max_rsp, sizeof(struct inquiry_info), GFP_KERNEL); |
| if (!buf) { |
| err = -ENOMEM; |
| goto done; |
| } |
| |
| hci_dev_lock(hdev); |
| ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); |
| hci_dev_unlock(hdev); |
| |
| BT_DBG("num_rsp %d", ir.num_rsp); |
| |
| if (!copy_to_user(ptr, &ir, sizeof(ir))) { |
| ptr += sizeof(ir); |
| if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * |
| ir.num_rsp)) |
| err = -EFAULT; |
| } else |
| err = -EFAULT; |
| |
| kfree(buf); |
| |
| done: |
| hci_dev_put(hdev); |
| return err; |
| } |
| |
| static int hci_dev_do_open(struct hci_dev *hdev) |
| { |
| int ret = 0; |
| |
| BT_DBG("%s %p", hdev->name, hdev); |
| |
| hci_req_sync_lock(hdev); |
| |
| ret = hci_dev_open_sync(hdev); |
| |
| hci_req_sync_unlock(hdev); |
| return ret; |
| } |
| |
| /* ---- HCI ioctl helpers ---- */ |
| |
| int hci_dev_open(__u16 dev) |
| { |
| struct hci_dev *hdev; |
| int err; |
| |
| hdev = hci_dev_get(dev); |
| if (!hdev) |
| return -ENODEV; |
| |
| /* Devices that are marked as unconfigured can only be powered |
| * up as user channel. Trying to bring them up as normal devices |
| * will result into a failure. Only user channel operation is |
| * possible. |
| * |
| * When this function is called for a user channel, the flag |
| * HCI_USER_CHANNEL will be set first before attempting to |
| * open the device. |
| */ |
| if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && |
| !hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
| err = -EOPNOTSUPP; |
| goto done; |
| } |
| |
| /* We need to ensure that no other power on/off work is pending |
| * before proceeding to call hci_dev_do_open. This is |
| * particularly important if the setup procedure has not yet |
| * completed. |
| */ |
| if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) |
| cancel_delayed_work(&hdev->power_off); |
| |
| /* After this call it is guaranteed that the setup procedure |
| * has finished. This means that error conditions like RFKILL |
| * or no valid public or static random address apply. |
| */ |
| flush_workqueue(hdev->req_workqueue); |
| |
| /* For controllers not using the management interface and that |
| * are brought up using legacy ioctl, set the HCI_BONDABLE bit |
| * so that pairing works for them. Once the management interface |
| * is in use this bit will be cleared again and userspace has |
| * to explicitly enable it. |
| */ |
| if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && |
| !hci_dev_test_flag(hdev, HCI_MGMT)) |
| hci_dev_set_flag(hdev, HCI_BONDABLE); |
| |
| err = hci_dev_do_open(hdev); |
| |
| done: |
| hci_dev_put(hdev); |
| return err; |
| } |
| |
| int hci_dev_do_close(struct hci_dev *hdev) |
| { |
| int err; |
| |
| BT_DBG("%s %p", hdev->name, hdev); |
| |
| hci_req_sync_lock(hdev); |
| |
| err = hci_dev_close_sync(hdev); |
| |
| hci_req_sync_unlock(hdev); |
| |
| return err; |
| } |
| |
| int hci_dev_close(__u16 dev) |
| { |
| struct hci_dev *hdev; |
| int err; |
| |
| hdev = hci_dev_get(dev); |
| if (!hdev) |
| return -ENODEV; |
| |
| if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
| err = -EBUSY; |
| goto done; |
| } |
| |
| cancel_work_sync(&hdev->power_on); |
| if (hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) |
| cancel_delayed_work(&hdev->power_off); |
| |
| err = hci_dev_do_close(hdev); |
| |
| done: |
| hci_dev_put(hdev); |
| return err; |
| } |
| |
| static int hci_dev_do_reset(struct hci_dev *hdev) |
| { |
| int ret; |
| |
| BT_DBG("%s %p", hdev->name, hdev); |
| |
| hci_req_sync_lock(hdev); |
| |
| /* Drop queues */ |
| skb_queue_purge(&hdev->rx_q); |
| skb_queue_purge(&hdev->cmd_q); |
| |
| /* Cancel these to avoid queueing non-chained pending work */ |
| hci_dev_set_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE); |
| /* Wait for |
| * |
| * if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE)) |
| * queue_delayed_work(&hdev->{cmd,ncmd}_timer) |
| * |
| * inside RCU section to see the flag or complete scheduling. |
| */ |
| synchronize_rcu(); |
| /* Explicitly cancel works in case scheduled after setting the flag. */ |
| cancel_delayed_work(&hdev->cmd_timer); |
| cancel_delayed_work(&hdev->ncmd_timer); |
| |
| /* Avoid potential lockdep warnings from the *_flush() calls by |
| * ensuring the workqueue is empty up front. |
| */ |
| drain_workqueue(hdev->workqueue); |
| |
| hci_dev_lock(hdev); |
| hci_inquiry_cache_flush(hdev); |
| hci_conn_hash_flush(hdev); |
| hci_dev_unlock(hdev); |
| |
| if (hdev->flush) |
| hdev->flush(hdev); |
| |
| hci_dev_clear_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE); |
| |
| atomic_set(&hdev->cmd_cnt, 1); |
| hdev->acl_cnt = 0; |
| hdev->sco_cnt = 0; |
| hdev->le_cnt = 0; |
| hdev->iso_cnt = 0; |
| |
| ret = hci_reset_sync(hdev); |
| |
| hci_req_sync_unlock(hdev); |
| return ret; |
| } |
| |
| int hci_dev_reset(__u16 dev) |
| { |
| struct hci_dev *hdev; |
| int err; |
| |
| hdev = hci_dev_get(dev); |
| if (!hdev) |
| return -ENODEV; |
| |
| if (!test_bit(HCI_UP, &hdev->flags)) { |
| err = -ENETDOWN; |
| goto done; |
| } |
| |
| if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
| err = -EBUSY; |
| goto done; |
| } |
| |
| if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { |
| err = -EOPNOTSUPP; |
| goto done; |
| } |
| |
| err = hci_dev_do_reset(hdev); |
| |
| done: |
| hci_dev_put(hdev); |
| return err; |
| } |
| |
| int hci_dev_reset_stat(__u16 dev) |
| { |
| struct hci_dev *hdev; |
| int ret = 0; |
| |
| hdev = hci_dev_get(dev); |
| if (!hdev) |
| return -ENODEV; |
| |
| if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
| ret = -EBUSY; |
| goto done; |
| } |
| |
| if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { |
| ret = -EOPNOTSUPP; |
| goto done; |
| } |
| |
| memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
| |
| done: |
| hci_dev_put(hdev); |
| return ret; |
| } |
| |
| static void hci_update_passive_scan_state(struct hci_dev *hdev, u8 scan) |
| { |
| bool conn_changed, discov_changed; |
| |
| BT_DBG("%s scan 0x%02x", hdev->name, scan); |
| |
| if ((scan & SCAN_PAGE)) |
| conn_changed = !hci_dev_test_and_set_flag(hdev, |
| HCI_CONNECTABLE); |
| else |
| conn_changed = hci_dev_test_and_clear_flag(hdev, |
| HCI_CONNECTABLE); |
| |
| if ((scan & SCAN_INQUIRY)) { |
| discov_changed = !hci_dev_test_and_set_flag(hdev, |
| HCI_DISCOVERABLE); |
| } else { |
| hci_dev_clear_flag(hdev, HCI_LIMITED_DISCOVERABLE); |
| discov_changed = hci_dev_test_and_clear_flag(hdev, |
| HCI_DISCOVERABLE); |
| } |
| |
| if (!hci_dev_test_flag(hdev, HCI_MGMT)) |
| return; |
| |
| if (conn_changed || discov_changed) { |
| /* In case this was disabled through mgmt */ |
| hci_dev_set_flag(hdev, HCI_BREDR_ENABLED); |
| |
| if (hci_dev_test_flag(hdev, HCI_LE_ENABLED)) |
| hci_update_adv_data(hdev, hdev->cur_adv_instance); |
| |
| mgmt_new_settings(hdev); |
| } |
| } |
| |
| int hci_dev_cmd(unsigned int cmd, void __user *arg) |
| { |
| struct hci_dev *hdev; |
| struct hci_dev_req dr; |
| int err = 0; |
| |
| if (copy_from_user(&dr, arg, sizeof(dr))) |
| return -EFAULT; |
| |
| hdev = hci_dev_get(dr.dev_id); |
| if (!hdev) |
| return -ENODEV; |
| |
| if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
| err = -EBUSY; |
| goto done; |
| } |
| |
| if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) { |
| err = -EOPNOTSUPP; |
| goto done; |
| } |
| |
| if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) { |
| err = -EOPNOTSUPP; |
| goto done; |
| } |
| |
| switch (cmd) { |
| case HCISETAUTH: |
| err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt, |
| HCI_INIT_TIMEOUT, NULL); |
| break; |
| |
| case HCISETENCRYPT: |
| if (!lmp_encrypt_capable(hdev)) { |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| if (!test_bit(HCI_AUTH, &hdev->flags)) { |
| /* Auth must be enabled first */ |
| err = hci_req_sync(hdev, hci_auth_req, dr.dev_opt, |
| HCI_INIT_TIMEOUT, NULL); |
| if (err) |
| break; |
| } |
| |
| err = hci_req_sync(hdev, hci_encrypt_req, dr.dev_opt, |
| HCI_INIT_TIMEOUT, NULL); |
| break; |
| |
| case HCISETSCAN: |
| err = hci_req_sync(hdev, hci_scan_req, dr.dev_opt, |
| HCI_INIT_TIMEOUT, NULL); |
| |
| /* Ensure that the connectable and discoverable states |
| * get correctly modified as this was a non-mgmt change. |
| */ |
| if (!err) |
| hci_update_passive_scan_state(hdev, dr.dev_opt); |
| break; |
| |
| case HCISETLINKPOL: |
| err = hci_req_sync(hdev, hci_linkpol_req, dr.dev_opt, |
| HCI_INIT_TIMEOUT, NULL); |
| break; |
| |
| case HCISETLINKMODE: |
| hdev->link_mode = ((__u16) dr.dev_opt) & |
| (HCI_LM_MASTER | HCI_LM_ACCEPT); |
| break; |
| |
| case HCISETPTYPE: |
| if (hdev->pkt_type == (__u16) dr.dev_opt) |
| break; |
| |
| hdev->pkt_type = (__u16) dr.dev_opt; |
| mgmt_phy_configuration_changed(hdev, NULL); |
| break; |
| |
| case HCISETACLMTU: |
| hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
| hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); |
| break; |
| |
| case HCISETSCOMTU: |
| hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
| hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); |
| break; |
| |
| default: |
| err = -EINVAL; |
| break; |
| } |
| |
| done: |
| hci_dev_put(hdev); |
| return err; |
| } |
| |
| int hci_get_dev_list(void __user *arg) |
| { |
| struct hci_dev *hdev; |
| struct hci_dev_list_req *dl; |
| struct hci_dev_req *dr; |
| int n = 0, size, err; |
| __u16 dev_num; |
| |
| if (get_user(dev_num, (__u16 __user *) arg)) |
| return -EFAULT; |
| |
| if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) |
| return -EINVAL; |
| |
| size = sizeof(*dl) + dev_num * sizeof(*dr); |
| |
| dl = kzalloc(size, GFP_KERNEL); |
| if (!dl) |
| return -ENOMEM; |
| |
| dr = dl->dev_req; |
| |
| read_lock(&hci_dev_list_lock); |
| list_for_each_entry(hdev, &hci_dev_list, list) { |
| unsigned long flags = hdev->flags; |
| |
| /* When the auto-off is configured it means the transport |
| * is running, but in that case still indicate that the |
| * device is actually down. |
| */ |
| if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) |
| flags &= ~BIT(HCI_UP); |
| |
| (dr + n)->dev_id = hdev->id; |
| (dr + n)->dev_opt = flags; |
| |
| if (++n >= dev_num) |
| break; |
| } |
| read_unlock(&hci_dev_list_lock); |
| |
| dl->dev_num = n; |
| size = sizeof(*dl) + n * sizeof(*dr); |
| |
| err = copy_to_user(arg, dl, size); |
| kfree(dl); |
| |
| return err ? -EFAULT : 0; |
| } |
| |
| int hci_get_dev_info(void __user *arg) |
| { |
| struct hci_dev *hdev; |
| struct hci_dev_info di; |
| unsigned long flags; |
| int err = 0; |
| |
| if (copy_from_user(&di, arg, sizeof(di))) |
| return -EFAULT; |
| |
| hdev = hci_dev_get(di.dev_id); |
| if (!hdev) |
| return -ENODEV; |
| |
| /* When the auto-off is configured it means the transport |
| * is running, but in that case still indicate that the |
| * device is actually down. |
| */ |
| if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) |
| flags = hdev->flags & ~BIT(HCI_UP); |
| else |
| flags = hdev->flags; |
| |
| strscpy(di.name, hdev->name, sizeof(di.name)); |
| di.bdaddr = hdev->bdaddr; |
| di.type = (hdev->bus & 0x0f); |
| di.flags = flags; |
| di.pkt_type = hdev->pkt_type; |
| if (lmp_bredr_capable(hdev)) { |
| di.acl_mtu = hdev->acl_mtu; |
| di.acl_pkts = hdev->acl_pkts; |
| di.sco_mtu = hdev->sco_mtu; |
| di.sco_pkts = hdev->sco_pkts; |
| } else { |
| di.acl_mtu = hdev->le_mtu; |
| di.acl_pkts = hdev->le_pkts; |
| di.sco_mtu = 0; |
| di.sco_pkts = 0; |
| } |
| di.link_policy = hdev->link_policy; |
| di.link_mode = hdev->link_mode; |
| |
| memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); |
| memcpy(&di.features, &hdev->features, sizeof(di.features)); |
| |
| if (copy_to_user(arg, &di, sizeof(di))) |
| err = -EFAULT; |
| |
| hci_dev_put(hdev); |
| |
| return err; |
| } |
| |
| /* ---- Interface to HCI drivers ---- */ |
| |
| static int hci_dev_do_poweroff(struct hci_dev *hdev) |
| { |
| int err; |
| |
| BT_DBG("%s %p", hdev->name, hdev); |
| |
| hci_req_sync_lock(hdev); |
| |
| err = hci_set_powered_sync(hdev, false); |
| |
| hci_req_sync_unlock(hdev); |
| |
| return err; |
| } |
| |
| static int hci_rfkill_set_block(void *data, bool blocked) |
| { |
| struct hci_dev *hdev = data; |
| int err; |
| |
| BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked); |
| |
| if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) |
| return -EBUSY; |
| |
| if (blocked == hci_dev_test_flag(hdev, HCI_RFKILLED)) |
| return 0; |
| |
| if (blocked) { |
| hci_dev_set_flag(hdev, HCI_RFKILLED); |
| |
| if (!hci_dev_test_flag(hdev, HCI_SETUP) && |
| !hci_dev_test_flag(hdev, HCI_CONFIG)) { |
| err = hci_dev_do_poweroff(hdev); |
| if (err) { |
| bt_dev_err(hdev, "Error when powering off device on rfkill (%d)", |
| err); |
| |
| /* Make sure the device is still closed even if |
| * anything during power off sequence (eg. |
| * disconnecting devices) failed. |
| */ |
| hci_dev_do_close(hdev); |
| } |
| } |
| } else { |
| hci_dev_clear_flag(hdev, HCI_RFKILLED); |
| } |
| |
| return 0; |
| } |
| |
| static const struct rfkill_ops hci_rfkill_ops = { |
| .set_block = hci_rfkill_set_block, |
| }; |
| |
| static void hci_power_on(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, power_on); |
| int err; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (test_bit(HCI_UP, &hdev->flags) && |
| hci_dev_test_flag(hdev, HCI_MGMT) && |
| hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) { |
| cancel_delayed_work(&hdev->power_off); |
| err = hci_powered_update_sync(hdev); |
| mgmt_power_on(hdev, err); |
| return; |
| } |
| |
| err = hci_dev_do_open(hdev); |
| if (err < 0) { |
| hci_dev_lock(hdev); |
| mgmt_set_powered_failed(hdev, err); |
| hci_dev_unlock(hdev); |
| return; |
| } |
| |
| /* During the HCI setup phase, a few error conditions are |
| * ignored and they need to be checked now. If they are still |
| * valid, it is important to turn the device back off. |
| */ |
| if (hci_dev_test_flag(hdev, HCI_RFKILLED) || |
| hci_dev_test_flag(hdev, HCI_UNCONFIGURED) || |
| (!bacmp(&hdev->bdaddr, BDADDR_ANY) && |
| !bacmp(&hdev->static_addr, BDADDR_ANY))) { |
| hci_dev_clear_flag(hdev, HCI_AUTO_OFF); |
| hci_dev_do_close(hdev); |
| } else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) { |
| queue_delayed_work(hdev->req_workqueue, &hdev->power_off, |
| HCI_AUTO_OFF_TIMEOUT); |
| } |
| |
| if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) { |
| /* For unconfigured devices, set the HCI_RAW flag |
| * so that userspace can easily identify them. |
| */ |
| if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
| set_bit(HCI_RAW, &hdev->flags); |
| |
| /* For fully configured devices, this will send |
| * the Index Added event. For unconfigured devices, |
| * it will send Unconfigued Index Added event. |
| * |
| * Devices with HCI_QUIRK_RAW_DEVICE are ignored |
| * and no event will be send. |
| */ |
| mgmt_index_added(hdev); |
| } else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) { |
| /* When the controller is now configured, then it |
| * is important to clear the HCI_RAW flag. |
| */ |
| if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
| clear_bit(HCI_RAW, &hdev->flags); |
| |
| /* Powering on the controller with HCI_CONFIG set only |
| * happens with the transition from unconfigured to |
| * configured. This will send the Index Added event. |
| */ |
| mgmt_index_added(hdev); |
| } |
| } |
| |
| static void hci_power_off(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, |
| power_off.work); |
| |
| BT_DBG("%s", hdev->name); |
| |
| hci_dev_do_close(hdev); |
| } |
| |
| static void hci_error_reset(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset); |
| |
| hci_dev_hold(hdev); |
| BT_DBG("%s", hdev->name); |
| |
| if (hdev->hw_error) |
| hdev->hw_error(hdev, hdev->hw_error_code); |
| else |
| bt_dev_err(hdev, "hardware error 0x%2.2x", hdev->hw_error_code); |
| |
| if (!hci_dev_do_close(hdev)) |
| hci_dev_do_open(hdev); |
| |
| hci_dev_put(hdev); |
| } |
| |
| void hci_uuids_clear(struct hci_dev *hdev) |
| { |
| struct bt_uuid *uuid, *tmp; |
| |
| list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) { |
| list_del(&uuid->list); |
| kfree(uuid); |
| } |
| } |
| |
| void hci_link_keys_clear(struct hci_dev *hdev) |
| { |
| struct link_key *key, *tmp; |
| |
| list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) { |
| list_del_rcu(&key->list); |
| kfree_rcu(key, rcu); |
| } |
| } |
| |
| void hci_smp_ltks_clear(struct hci_dev *hdev) |
| { |
| struct smp_ltk *k, *tmp; |
| |
| list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { |
| list_del_rcu(&k->list); |
| kfree_rcu(k, rcu); |
| } |
| } |
| |
| void hci_smp_irks_clear(struct hci_dev *hdev) |
| { |
| struct smp_irk *k, *tmp; |
| |
| list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) { |
| list_del_rcu(&k->list); |
| kfree_rcu(k, rcu); |
| } |
| } |
| |
| void hci_blocked_keys_clear(struct hci_dev *hdev) |
| { |
| struct blocked_key *b, *tmp; |
| |
| list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) { |
| list_del_rcu(&b->list); |
| kfree_rcu(b, rcu); |
| } |
| } |
| |
| bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16]) |
| { |
| bool blocked = false; |
| struct blocked_key *b; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(b, &hdev->blocked_keys, list) { |
| if (b->type == type && !memcmp(b->val, val, sizeof(b->val))) { |
| blocked = true; |
| break; |
| } |
| } |
| |
| rcu_read_unlock(); |
| return blocked; |
| } |
| |
| struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct link_key *k; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(k, &hdev->link_keys, list) { |
| if (bacmp(bdaddr, &k->bdaddr) == 0) { |
| rcu_read_unlock(); |
| |
| if (hci_is_blocked_key(hdev, |
| HCI_BLOCKED_KEY_TYPE_LINKKEY, |
| k->val)) { |
| bt_dev_warn_ratelimited(hdev, |
| "Link key blocked for %pMR", |
| &k->bdaddr); |
| return NULL; |
| } |
| |
| return k; |
| } |
| } |
| rcu_read_unlock(); |
| |
| return NULL; |
| } |
| |
| static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn, |
| u8 key_type, u8 old_key_type) |
| { |
| /* Legacy key */ |
| if (key_type < 0x03) |
| return true; |
| |
| /* Debug keys are insecure so don't store them persistently */ |
| if (key_type == HCI_LK_DEBUG_COMBINATION) |
| return false; |
| |
| /* Changed combination key and there's no previous one */ |
| if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff) |
| return false; |
| |
| /* Security mode 3 case */ |
| if (!conn) |
| return true; |
| |
| /* BR/EDR key derived using SC from an LE link */ |
| if (conn->type == LE_LINK) |
| return true; |
| |
| /* Neither local nor remote side had no-bonding as requirement */ |
| if (conn->auth_type > 0x01 && conn->remote_auth > 0x01) |
| return true; |
| |
| /* Local side had dedicated bonding as requirement */ |
| if (conn->auth_type == 0x02 || conn->auth_type == 0x03) |
| return true; |
| |
| /* Remote side had dedicated bonding as requirement */ |
| if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03) |
| return true; |
| |
| /* If none of the above criteria match, then don't store the key |
| * persistently */ |
| return false; |
| } |
| |
| static u8 ltk_role(u8 type) |
| { |
| if (type == SMP_LTK) |
| return HCI_ROLE_MASTER; |
| |
| return HCI_ROLE_SLAVE; |
| } |
| |
| struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, |
| u8 addr_type, u8 role) |
| { |
| struct smp_ltk *k; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(k, &hdev->long_term_keys, list) { |
| if (addr_type != k->bdaddr_type || bacmp(bdaddr, &k->bdaddr)) |
| continue; |
| |
| if (smp_ltk_is_sc(k) || ltk_role(k->type) == role) { |
| rcu_read_unlock(); |
| |
| if (hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_LTK, |
| k->val)) { |
| bt_dev_warn_ratelimited(hdev, |
| "LTK blocked for %pMR", |
| &k->bdaddr); |
| return NULL; |
| } |
| |
| return k; |
| } |
| } |
| rcu_read_unlock(); |
| |
| return NULL; |
| } |
| |
| struct smp_irk *hci_find_irk_by_rpa(struct hci_dev *hdev, bdaddr_t *rpa) |
| { |
| struct smp_irk *irk_to_return = NULL; |
| struct smp_irk *irk; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) { |
| if (!bacmp(&irk->rpa, rpa)) { |
| irk_to_return = irk; |
| goto done; |
| } |
| } |
| |
| list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) { |
| if (smp_irk_matches(hdev, irk->val, rpa)) { |
| bacpy(&irk->rpa, rpa); |
| irk_to_return = irk; |
| goto done; |
| } |
| } |
| |
| done: |
| if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK, |
| irk_to_return->val)) { |
| bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR", |
| &irk_to_return->bdaddr); |
| irk_to_return = NULL; |
| } |
| |
| rcu_read_unlock(); |
| |
| return irk_to_return; |
| } |
| |
| struct smp_irk *hci_find_irk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr, |
| u8 addr_type) |
| { |
| struct smp_irk *irk_to_return = NULL; |
| struct smp_irk *irk; |
| |
| /* Identity Address must be public or static random */ |
| if (addr_type == ADDR_LE_DEV_RANDOM && (bdaddr->b[5] & 0xc0) != 0xc0) |
| return NULL; |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(irk, &hdev->identity_resolving_keys, list) { |
| if (addr_type == irk->addr_type && |
| bacmp(bdaddr, &irk->bdaddr) == 0) { |
| irk_to_return = irk; |
| goto done; |
| } |
| } |
| |
| done: |
| |
| if (irk_to_return && hci_is_blocked_key(hdev, HCI_BLOCKED_KEY_TYPE_IRK, |
| irk_to_return->val)) { |
| bt_dev_warn_ratelimited(hdev, "Identity key blocked for %pMR", |
| &irk_to_return->bdaddr); |
| irk_to_return = NULL; |
| } |
| |
| rcu_read_unlock(); |
| |
| return irk_to_return; |
| } |
| |
| struct link_key *hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, |
| bdaddr_t *bdaddr, u8 *val, u8 type, |
| u8 pin_len, bool *persistent) |
| { |
| struct link_key *key, *old_key; |
| u8 old_key_type; |
| |
| old_key = hci_find_link_key(hdev, bdaddr); |
| if (old_key) { |
| old_key_type = old_key->type; |
| key = old_key; |
| } else { |
| old_key_type = conn ? conn->key_type : 0xff; |
| key = kzalloc(sizeof(*key), GFP_KERNEL); |
| if (!key) |
| return NULL; |
| list_add_rcu(&key->list, &hdev->link_keys); |
| } |
| |
| BT_DBG("%s key for %pMR type %u", hdev->name, bdaddr, type); |
| |
| /* Some buggy controller combinations generate a changed |
| * combination key for legacy pairing even when there's no |
| * previous key */ |
| if (type == HCI_LK_CHANGED_COMBINATION && |
| (!conn || conn->remote_auth == 0xff) && old_key_type == 0xff) { |
| type = HCI_LK_COMBINATION; |
| if (conn) |
| conn->key_type = type; |
| } |
| |
| bacpy(&key->bdaddr, bdaddr); |
| memcpy(key->val, val, HCI_LINK_KEY_SIZE); |
| key->pin_len = pin_len; |
| |
| if (type == HCI_LK_CHANGED_COMBINATION) |
| key->type = old_key_type; |
| else |
| key->type = type; |
| |
| if (persistent) |
| *persistent = hci_persistent_key(hdev, conn, type, |
| old_key_type); |
| |
| return key; |
| } |
| |
| struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, |
| u8 addr_type, u8 type, u8 authenticated, |
| u8 tk[16], u8 enc_size, __le16 ediv, __le64 rand) |
| { |
| struct smp_ltk *key, *old_key; |
| u8 role = ltk_role(type); |
| |
| old_key = hci_find_ltk(hdev, bdaddr, addr_type, role); |
| if (old_key) |
| key = old_key; |
| else { |
| key = kzalloc(sizeof(*key), GFP_KERNEL); |
| if (!key) |
| return NULL; |
| list_add_rcu(&key->list, &hdev->long_term_keys); |
| } |
| |
| bacpy(&key->bdaddr, bdaddr); |
| key->bdaddr_type = addr_type; |
| memcpy(key->val, tk, sizeof(key->val)); |
| key->authenticated = authenticated; |
| key->ediv = ediv; |
| key->rand = rand; |
| key->enc_size = enc_size; |
| key->type = type; |
| |
| return key; |
| } |
| |
| struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, |
| u8 addr_type, u8 val[16], bdaddr_t *rpa) |
| { |
| struct smp_irk *irk; |
| |
| irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type); |
| if (!irk) { |
| irk = kzalloc(sizeof(*irk), GFP_KERNEL); |
| if (!irk) |
| return NULL; |
| |
| bacpy(&irk->bdaddr, bdaddr); |
| irk->addr_type = addr_type; |
| |
| list_add_rcu(&irk->list, &hdev->identity_resolving_keys); |
| } |
| |
| memcpy(irk->val, val, 16); |
| bacpy(&irk->rpa, rpa); |
| |
| return irk; |
| } |
| |
| int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| { |
| struct link_key *key; |
| |
| key = hci_find_link_key(hdev, bdaddr); |
| if (!key) |
| return -ENOENT; |
| |
| BT_DBG("%s removing %pMR", hdev->name, bdaddr); |
| |
| list_del_rcu(&key->list); |
| kfree_rcu(key, rcu); |
| |
| return 0; |
| } |
| |
| int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type) |
| { |
| struct smp_ltk *k, *tmp; |
| int removed = 0; |
| |
| list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { |
| if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type) |
| continue; |
| |
| BT_DBG("%s removing %pMR", hdev->name, bdaddr); |
| |
| list_del_rcu(&k->list); |
| kfree_rcu(k, rcu); |
| removed++; |
| } |
| |
| return removed ? 0 : -ENOENT; |
| } |
| |
| void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type) |
| { |
| struct smp_irk *k, *tmp; |
| |
| list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) { |
| if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type) |
| continue; |
| |
| BT_DBG("%s removing %pMR", hdev->name, bdaddr); |
| |
| list_del_rcu(&k->list); |
| kfree_rcu(k, rcu); |
| } |
| } |
| |
| bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type) |
| { |
| struct smp_ltk *k; |
| struct smp_irk *irk; |
| u8 addr_type; |
| |
| if (type == BDADDR_BREDR) { |
| if (hci_find_link_key(hdev, bdaddr)) |
| return true; |
| return false; |
| } |
| |
| /* Convert to HCI addr type which struct smp_ltk uses */ |
| if (type == BDADDR_LE_PUBLIC) |
| addr_type = ADDR_LE_DEV_PUBLIC; |
| else |
| addr_type = ADDR_LE_DEV_RANDOM; |
| |
| irk = hci_get_irk(hdev, bdaddr, addr_type); |
| if (irk) { |
| bdaddr = &irk->bdaddr; |
| addr_type = irk->addr_type; |
| } |
| |
| rcu_read_lock(); |
| list_for_each_entry_rcu(k, &hdev->long_term_keys, list) { |
| if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) { |
| rcu_read_unlock(); |
| return true; |
| } |
| } |
| rcu_read_unlock(); |
| |
| return false; |
| } |
| |
| /* HCI command timer function */ |
| static void hci_cmd_timeout(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, |
| cmd_timer.work); |
| |
| if (hdev->req_skb) { |
| u16 opcode = hci_skb_opcode(hdev->req_skb); |
| |
| bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode); |
| |
| hci_cmd_sync_cancel_sync(hdev, ETIMEDOUT); |
| } else { |
| bt_dev_err(hdev, "command tx timeout"); |
| } |
| |
| if (hdev->cmd_timeout) |
| hdev->cmd_timeout(hdev); |
| |
| atomic_set(&hdev->cmd_cnt, 1); |
| queue_work(hdev->workqueue, &hdev->cmd_work); |
| } |
| |
| /* HCI ncmd timer function */ |
| static void hci_ncmd_timeout(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, |
| ncmd_timer.work); |
| |
| bt_dev_err(hdev, "Controller not accepting commands anymore: ncmd = 0"); |
| |
| /* During HCI_INIT phase no events can be injected if the ncmd timer |
| * triggers since the procedure has its own timeout handling. |
| */ |
| if (test_bit(HCI_INIT, &hdev->flags)) |
| return; |
| |
| /* This is an irrecoverable state, inject hardware error event */ |
| hci_reset_dev(hdev); |
| } |
| |
| struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev, |
| bdaddr_t *bdaddr, u8 bdaddr_type) |
| { |
| struct oob_data *data; |
| |
| list_for_each_entry(data, &hdev->remote_oob_data, list) { |
| if (bacmp(bdaddr, &data->bdaddr) != 0) |
| continue; |
| if (data->bdaddr_type != bdaddr_type) |
| continue; |
| return data; |
| } |
| |
| return NULL; |
| } |
| |
| int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, |
| u8 bdaddr_type) |
| { |
| struct oob_data *data; |
| |
| data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type); |
| if (!data) |
| return -ENOENT; |
| |
| BT_DBG("%s removing %pMR (%u)", hdev->name, bdaddr, bdaddr_type); |
| |
| list_del(&data->list); |
| kfree(data); |
| |
| return 0; |
| } |
| |
| void hci_remote_oob_data_clear(struct hci_dev *hdev) |
| { |
| struct oob_data *data, *n; |
| |
| list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) { |
| list_del(&data->list); |
| kfree(data); |
| } |
| } |
| |
| int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, |
| u8 bdaddr_type, u8 *hash192, u8 *rand192, |
| u8 *hash256, u8 *rand256) |
| { |
| struct oob_data *data; |
| |
| data = hci_find_remote_oob_data(hdev, bdaddr, bdaddr_type); |
| if (!data) { |
| data = kmalloc(sizeof(*data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| bacpy(&data->bdaddr, bdaddr); |
| data->bdaddr_type = bdaddr_type; |
| list_add(&data->list, &hdev->remote_oob_data); |
| } |
| |
| if (hash192 && rand192) { |
| memcpy(data->hash192, hash192, sizeof(data->hash192)); |
| memcpy(data->rand192, rand192, sizeof(data->rand192)); |
| if (hash256 && rand256) |
| data->present = 0x03; |
| } else { |
| memset(data->hash192, 0, sizeof(data->hash192)); |
| memset(data->rand192, 0, sizeof(data->rand192)); |
| if (hash256 && rand256) |
| data->present = 0x02; |
| else |
| data->present = 0x00; |
| } |
| |
| if (hash256 && rand256) { |
| memcpy(data->hash256, hash256, sizeof(data->hash256)); |
| memcpy(data->rand256, rand256, sizeof(data->rand256)); |
| } else { |
| memset(data->hash256, 0, sizeof(data->hash256)); |
| memset(data->rand256, 0, sizeof(data->rand256)); |
| if (hash192 && rand192) |
| data->present = 0x01; |
| } |
| |
| BT_DBG("%s for %pMR", hdev->name, bdaddr); |
| |
| return 0; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| struct adv_info *hci_find_adv_instance(struct hci_dev *hdev, u8 instance) |
| { |
| struct adv_info *adv_instance; |
| |
| list_for_each_entry(adv_instance, &hdev->adv_instances, list) { |
| if (adv_instance->instance == instance) |
| return adv_instance; |
| } |
| |
| return NULL; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| struct adv_info *hci_get_next_instance(struct hci_dev *hdev, u8 instance) |
| { |
| struct adv_info *cur_instance; |
| |
| cur_instance = hci_find_adv_instance(hdev, instance); |
| if (!cur_instance) |
| return NULL; |
| |
| if (cur_instance == list_last_entry(&hdev->adv_instances, |
| struct adv_info, list)) |
| return list_first_entry(&hdev->adv_instances, |
| struct adv_info, list); |
| else |
| return list_next_entry(cur_instance, list); |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance) |
| { |
| struct adv_info *adv_instance; |
| |
| adv_instance = hci_find_adv_instance(hdev, instance); |
| if (!adv_instance) |
| return -ENOENT; |
| |
| BT_DBG("%s removing %dMR", hdev->name, instance); |
| |
| if (hdev->cur_adv_instance == instance) { |
| if (hdev->adv_instance_timeout) { |
| cancel_delayed_work(&hdev->adv_instance_expire); |
| hdev->adv_instance_timeout = 0; |
| } |
| hdev->cur_adv_instance = 0x00; |
| } |
| |
| cancel_delayed_work_sync(&adv_instance->rpa_expired_cb); |
| |
| list_del(&adv_instance->list); |
| kfree(adv_instance); |
| |
| hdev->adv_instance_cnt--; |
| |
| return 0; |
| } |
| |
| void hci_adv_instances_set_rpa_expired(struct hci_dev *hdev, bool rpa_expired) |
| { |
| struct adv_info *adv_instance, *n; |
| |
| list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) |
| adv_instance->rpa_expired = rpa_expired; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| void hci_adv_instances_clear(struct hci_dev *hdev) |
| { |
| struct adv_info *adv_instance, *n; |
| |
| if (hdev->adv_instance_timeout) { |
| cancel_delayed_work(&hdev->adv_instance_expire); |
| hdev->adv_instance_timeout = 0; |
| } |
| |
| list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) { |
| cancel_delayed_work_sync(&adv_instance->rpa_expired_cb); |
| list_del(&adv_instance->list); |
| kfree(adv_instance); |
| } |
| |
| hdev->adv_instance_cnt = 0; |
| hdev->cur_adv_instance = 0x00; |
| } |
| |
| static void adv_instance_rpa_expired(struct work_struct *work) |
| { |
| struct adv_info *adv_instance = container_of(work, struct adv_info, |
| rpa_expired_cb.work); |
| |
| BT_DBG(""); |
| |
| adv_instance->rpa_expired = true; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance, |
| u32 flags, u16 adv_data_len, u8 *adv_data, |
| u16 scan_rsp_len, u8 *scan_rsp_data, |
| u16 timeout, u16 duration, s8 tx_power, |
| u32 min_interval, u32 max_interval, |
| u8 mesh_handle) |
| { |
| struct adv_info *adv; |
| |
| adv = hci_find_adv_instance(hdev, instance); |
| if (adv) { |
| memset(adv->adv_data, 0, sizeof(adv->adv_data)); |
| memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data)); |
| memset(adv->per_adv_data, 0, sizeof(adv->per_adv_data)); |
| } else { |
| if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets || |
| instance < 1 || instance > hdev->le_num_of_adv_sets + 1) |
| return ERR_PTR(-EOVERFLOW); |
| |
| adv = kzalloc(sizeof(*adv), GFP_KERNEL); |
| if (!adv) |
| return ERR_PTR(-ENOMEM); |
| |
| adv->pending = true; |
| adv->instance = instance; |
| |
| /* If controller support only one set and the instance is set to |
| * 1 then there is no option other than using handle 0x00. |
| */ |
| if (hdev->le_num_of_adv_sets == 1 && instance == 1) |
| adv->handle = 0x00; |
| else |
| adv->handle = instance; |
| |
| list_add(&adv->list, &hdev->adv_instances); |
| hdev->adv_instance_cnt++; |
| } |
| |
| adv->flags = flags; |
| adv->min_interval = min_interval; |
| adv->max_interval = max_interval; |
| adv->tx_power = tx_power; |
| /* Defining a mesh_handle changes the timing units to ms, |
| * rather than seconds, and ties the instance to the requested |
| * mesh_tx queue. |
| */ |
| adv->mesh = mesh_handle; |
| |
| hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data, |
| scan_rsp_len, scan_rsp_data); |
| |
| adv->timeout = timeout; |
| adv->remaining_time = timeout; |
| |
| if (duration == 0) |
| adv->duration = hdev->def_multi_adv_rotation_duration; |
| else |
| adv->duration = duration; |
| |
| INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired); |
| |
| BT_DBG("%s for %dMR", hdev->name, instance); |
| |
| return adv; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance, |
| u32 flags, u8 data_len, u8 *data, |
| u32 min_interval, u32 max_interval) |
| { |
| struct adv_info *adv; |
| |
| adv = hci_add_adv_instance(hdev, instance, flags, 0, NULL, 0, NULL, |
| 0, 0, HCI_ADV_TX_POWER_NO_PREFERENCE, |
| min_interval, max_interval, 0); |
| if (IS_ERR(adv)) |
| return adv; |
| |
| adv->periodic = true; |
| adv->per_adv_data_len = data_len; |
| |
| if (data) |
| memcpy(adv->per_adv_data, data, data_len); |
| |
| return adv; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| int hci_set_adv_instance_data(struct hci_dev *hdev, u8 instance, |
| u16 adv_data_len, u8 *adv_data, |
| u16 scan_rsp_len, u8 *scan_rsp_data) |
| { |
| struct adv_info *adv; |
| |
| adv = hci_find_adv_instance(hdev, instance); |
| |
| /* If advertisement doesn't exist, we can't modify its data */ |
| if (!adv) |
| return -ENOENT; |
| |
| if (adv_data_len && ADV_DATA_CMP(adv, adv_data, adv_data_len)) { |
| memset(adv->adv_data, 0, sizeof(adv->adv_data)); |
| memcpy(adv->adv_data, adv_data, adv_data_len); |
| adv->adv_data_len = adv_data_len; |
| adv->adv_data_changed = true; |
| } |
| |
| if (scan_rsp_len && SCAN_RSP_CMP(adv, scan_rsp_data, scan_rsp_len)) { |
| memset(adv->scan_rsp_data, 0, sizeof(adv->scan_rsp_data)); |
| memcpy(adv->scan_rsp_data, scan_rsp_data, scan_rsp_len); |
| adv->scan_rsp_len = scan_rsp_len; |
| adv->scan_rsp_changed = true; |
| } |
| |
| /* Mark as changed if there are flags which would affect it */ |
| if (((adv->flags & MGMT_ADV_FLAG_APPEARANCE) && hdev->appearance) || |
| adv->flags & MGMT_ADV_FLAG_LOCAL_NAME) |
| adv->scan_rsp_changed = true; |
| |
| return 0; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| u32 hci_adv_instance_flags(struct hci_dev *hdev, u8 instance) |
| { |
| u32 flags; |
| struct adv_info *adv; |
| |
| if (instance == 0x00) { |
| /* Instance 0 always manages the "Tx Power" and "Flags" |
| * fields |
| */ |
| flags = MGMT_ADV_FLAG_TX_POWER | MGMT_ADV_FLAG_MANAGED_FLAGS; |
| |
| /* For instance 0, the HCI_ADVERTISING_CONNECTABLE setting |
| * corresponds to the "connectable" instance flag. |
| */ |
| if (hci_dev_test_flag(hdev, HCI_ADVERTISING_CONNECTABLE)) |
| flags |= MGMT_ADV_FLAG_CONNECTABLE; |
| |
| if (hci_dev_test_flag(hdev, HCI_LIMITED_DISCOVERABLE)) |
| flags |= MGMT_ADV_FLAG_LIMITED_DISCOV; |
| else if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE)) |
| flags |= MGMT_ADV_FLAG_DISCOV; |
| |
| return flags; |
| } |
| |
| adv = hci_find_adv_instance(hdev, instance); |
| |
| /* Return 0 when we got an invalid instance identifier. */ |
| if (!adv) |
| return 0; |
| |
| return adv->flags; |
| } |
| |
| bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance) |
| { |
| struct adv_info *adv; |
| |
| /* Instance 0x00 always set local name */ |
| if (instance == 0x00) |
| return true; |
| |
| adv = hci_find_adv_instance(hdev, instance); |
| if (!adv) |
| return false; |
| |
| if (adv->flags & MGMT_ADV_FLAG_APPEARANCE || |
| adv->flags & MGMT_ADV_FLAG_LOCAL_NAME) |
| return true; |
| |
| return adv->scan_rsp_len ? true : false; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| void hci_adv_monitors_clear(struct hci_dev *hdev) |
| { |
| struct adv_monitor *monitor; |
| int handle; |
| |
| idr_for_each_entry(&hdev->adv_monitors_idr, monitor, handle) |
| hci_free_adv_monitor(hdev, monitor); |
| |
| idr_destroy(&hdev->adv_monitors_idr); |
| } |
| |
| /* Frees the monitor structure and do some bookkeepings. |
| * This function requires the caller holds hdev->lock. |
| */ |
| void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor) |
| { |
| struct adv_pattern *pattern; |
| struct adv_pattern *tmp; |
| |
| if (!monitor) |
| return; |
| |
| list_for_each_entry_safe(pattern, tmp, &monitor->patterns, list) { |
| list_del(&pattern->list); |
| kfree(pattern); |
| } |
| |
| if (monitor->handle) |
| idr_remove(&hdev->adv_monitors_idr, monitor->handle); |
| |
| if (monitor->state != ADV_MONITOR_STATE_NOT_REGISTERED) { |
| hdev->adv_monitors_cnt--; |
| mgmt_adv_monitor_removed(hdev, monitor->handle); |
| } |
| |
| kfree(monitor); |
| } |
| |
| /* Assigns handle to a monitor, and if offloading is supported and power is on, |
| * also attempts to forward the request to the controller. |
| * This function requires the caller holds hci_req_sync_lock. |
| */ |
| int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor) |
| { |
| int min, max, handle; |
| int status = 0; |
| |
| if (!monitor) |
| return -EINVAL; |
| |
| hci_dev_lock(hdev); |
| |
| min = HCI_MIN_ADV_MONITOR_HANDLE; |
| max = HCI_MIN_ADV_MONITOR_HANDLE + HCI_MAX_ADV_MONITOR_NUM_HANDLES; |
| handle = idr_alloc(&hdev->adv_monitors_idr, monitor, min, max, |
| GFP_KERNEL); |
| |
| hci_dev_unlock(hdev); |
| |
| if (handle < 0) |
| return handle; |
| |
| monitor->handle = handle; |
| |
| if (!hdev_is_powered(hdev)) |
| return status; |
| |
| switch (hci_get_adv_monitor_offload_ext(hdev)) { |
| case HCI_ADV_MONITOR_EXT_NONE: |
| bt_dev_dbg(hdev, "add monitor %d status %d", |
| monitor->handle, status); |
| /* Message was not forwarded to controller - not an error */ |
| break; |
| |
| case HCI_ADV_MONITOR_EXT_MSFT: |
| status = msft_add_monitor_pattern(hdev, monitor); |
| bt_dev_dbg(hdev, "add monitor %d msft status %d", |
| handle, status); |
| break; |
| } |
| |
| return status; |
| } |
| |
| /* Attempts to tell the controller and free the monitor. If somehow the |
| * controller doesn't have a corresponding handle, remove anyway. |
| * This function requires the caller holds hci_req_sync_lock. |
| */ |
| static int hci_remove_adv_monitor(struct hci_dev *hdev, |
| struct adv_monitor *monitor) |
| { |
| int status = 0; |
| int handle; |
| |
| switch (hci_get_adv_monitor_offload_ext(hdev)) { |
| case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */ |
| bt_dev_dbg(hdev, "remove monitor %d status %d", |
| monitor->handle, status); |
| goto free_monitor; |
| |
| case HCI_ADV_MONITOR_EXT_MSFT: |
| handle = monitor->handle; |
| status = msft_remove_monitor(hdev, monitor); |
| bt_dev_dbg(hdev, "remove monitor %d msft status %d", |
| handle, status); |
| break; |
| } |
| |
| /* In case no matching handle registered, just free the monitor */ |
| if (status == -ENOENT) |
| goto free_monitor; |
| |
| return status; |
| |
| free_monitor: |
| if (status == -ENOENT) |
| bt_dev_warn(hdev, "Removing monitor with no matching handle %d", |
| monitor->handle); |
| hci_free_adv_monitor(hdev, monitor); |
| |
| return status; |
| } |
| |
| /* This function requires the caller holds hci_req_sync_lock */ |
| int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle) |
| { |
| struct adv_monitor *monitor = idr_find(&hdev->adv_monitors_idr, handle); |
| |
| if (!monitor) |
| return -EINVAL; |
| |
| return hci_remove_adv_monitor(hdev, monitor); |
| } |
| |
| /* This function requires the caller holds hci_req_sync_lock */ |
| int hci_remove_all_adv_monitor(struct hci_dev *hdev) |
| { |
| struct adv_monitor *monitor; |
| int idr_next_id = 0; |
| int status = 0; |
| |
| while (1) { |
| monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id); |
| if (!monitor) |
| break; |
| |
| status = hci_remove_adv_monitor(hdev, monitor); |
| if (status) |
| return status; |
| |
| idr_next_id++; |
| } |
| |
| return status; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| bool hci_is_adv_monitoring(struct hci_dev *hdev) |
| { |
| return !idr_is_empty(&hdev->adv_monitors_idr); |
| } |
| |
| int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev) |
| { |
| if (msft_monitor_supported(hdev)) |
| return HCI_ADV_MONITOR_EXT_MSFT; |
| |
| return HCI_ADV_MONITOR_EXT_NONE; |
| } |
| |
| struct bdaddr_list *hci_bdaddr_list_lookup(struct list_head *bdaddr_list, |
| bdaddr_t *bdaddr, u8 type) |
| { |
| struct bdaddr_list *b; |
| |
| list_for_each_entry(b, bdaddr_list, list) { |
| if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type) |
| return b; |
| } |
| |
| return NULL; |
| } |
| |
| struct bdaddr_list_with_irk *hci_bdaddr_list_lookup_with_irk( |
| struct list_head *bdaddr_list, bdaddr_t *bdaddr, |
| u8 type) |
| { |
| struct bdaddr_list_with_irk *b; |
| |
| list_for_each_entry(b, bdaddr_list, list) { |
| if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type) |
| return b; |
| } |
| |
| return NULL; |
| } |
| |
| struct bdaddr_list_with_flags * |
| hci_bdaddr_list_lookup_with_flags(struct list_head *bdaddr_list, |
| bdaddr_t *bdaddr, u8 type) |
| { |
| struct bdaddr_list_with_flags *b; |
| |
| list_for_each_entry(b, bdaddr_list, list) { |
| if (!bacmp(&b->bdaddr, bdaddr) && b->bdaddr_type == type) |
| return b; |
| } |
| |
| return NULL; |
| } |
| |
| void hci_bdaddr_list_clear(struct list_head *bdaddr_list) |
| { |
| struct bdaddr_list *b, *n; |
| |
| list_for_each_entry_safe(b, n, bdaddr_list, list) { |
| list_del(&b->list); |
| kfree(b); |
| } |
| } |
| |
| int hci_bdaddr_list_add(struct list_head *list, bdaddr_t *bdaddr, u8 type) |
| { |
| struct bdaddr_list *entry; |
| |
| if (!bacmp(bdaddr, BDADDR_ANY)) |
| return -EBADF; |
| |
| if (hci_bdaddr_list_lookup(list, bdaddr, type)) |
| return -EEXIST; |
| |
| entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
| if (!entry) |
| return -ENOMEM; |
| |
| bacpy(&entry->bdaddr, bdaddr); |
| entry->bdaddr_type = type; |
| |
| list_add(&entry->list, list); |
| |
| return 0; |
| } |
| |
| int hci_bdaddr_list_add_with_irk(struct list_head *list, bdaddr_t *bdaddr, |
| u8 type, u8 *peer_irk, u8 *local_irk) |
| { |
| struct bdaddr_list_with_irk *entry; |
| |
| if (!bacmp(bdaddr, BDADDR_ANY)) |
| return -EBADF; |
| |
| if (hci_bdaddr_list_lookup(list, bdaddr, type)) |
| return -EEXIST; |
| |
| entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
| if (!entry) |
| return -ENOMEM; |
| |
| bacpy(&entry->bdaddr, bdaddr); |
| entry->bdaddr_type = type; |
| |
| if (peer_irk) |
| memcpy(entry->peer_irk, peer_irk, 16); |
| |
| if (local_irk) |
| memcpy(entry->local_irk, local_irk, 16); |
| |
| list_add(&entry->list, list); |
| |
| return 0; |
| } |
| |
| int hci_bdaddr_list_add_with_flags(struct list_head *list, bdaddr_t *bdaddr, |
| u8 type, u32 flags) |
| { |
| struct bdaddr_list_with_flags *entry; |
| |
| if (!bacmp(bdaddr, BDADDR_ANY)) |
| return -EBADF; |
| |
| if (hci_bdaddr_list_lookup(list, bdaddr, type)) |
| return -EEXIST; |
| |
| entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
| if (!entry) |
| return -ENOMEM; |
| |
| bacpy(&entry->bdaddr, bdaddr); |
| entry->bdaddr_type = type; |
| entry->flags = flags; |
| |
| list_add(&entry->list, list); |
| |
| return 0; |
| } |
| |
| int hci_bdaddr_list_del(struct list_head *list, bdaddr_t *bdaddr, u8 type) |
| { |
| struct bdaddr_list *entry; |
| |
| if (!bacmp(bdaddr, BDADDR_ANY)) { |
| hci_bdaddr_list_clear(list); |
| return 0; |
| } |
| |
| entry = hci_bdaddr_list_lookup(list, bdaddr, type); |
| if (!entry) |
| return -ENOENT; |
| |
| list_del(&entry->list); |
| kfree(entry); |
| |
| return 0; |
| } |
| |
| int hci_bdaddr_list_del_with_irk(struct list_head *list, bdaddr_t *bdaddr, |
| u8 type) |
| { |
| struct bdaddr_list_with_irk *entry; |
| |
| if (!bacmp(bdaddr, BDADDR_ANY)) { |
| hci_bdaddr_list_clear(list); |
| return 0; |
| } |
| |
| entry = hci_bdaddr_list_lookup_with_irk(list, bdaddr, type); |
| if (!entry) |
| return -ENOENT; |
| |
| list_del(&entry->list); |
| kfree(entry); |
| |
| return 0; |
| } |
| |
| int hci_bdaddr_list_del_with_flags(struct list_head *list, bdaddr_t *bdaddr, |
| u8 type) |
| { |
| struct bdaddr_list_with_flags *entry; |
| |
| if (!bacmp(bdaddr, BDADDR_ANY)) { |
| hci_bdaddr_list_clear(list); |
| return 0; |
| } |
| |
| entry = hci_bdaddr_list_lookup_with_flags(list, bdaddr, type); |
| if (!entry) |
| return -ENOENT; |
| |
| list_del(&entry->list); |
| kfree(entry); |
| |
| return 0; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev, |
| bdaddr_t *addr, u8 addr_type) |
| { |
| struct hci_conn_params *params; |
| |
| list_for_each_entry(params, &hdev->le_conn_params, list) { |
| if (bacmp(¶ms->addr, addr) == 0 && |
| params->addr_type == addr_type) { |
| return params; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| /* This function requires the caller holds hdev->lock or rcu_read_lock */ |
| struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list, |
| bdaddr_t *addr, u8 addr_type) |
| { |
| struct hci_conn_params *param; |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(param, list, action) { |
| if (bacmp(¶m->addr, addr) == 0 && |
| param->addr_type == addr_type) { |
| rcu_read_unlock(); |
| return param; |
| } |
| } |
| |
| rcu_read_unlock(); |
| |
| return NULL; |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| void hci_pend_le_list_del_init(struct hci_conn_params *param) |
| { |
| if (list_empty(¶m->action)) |
| return; |
| |
| list_del_rcu(¶m->action); |
| synchronize_rcu(); |
| INIT_LIST_HEAD(¶m->action); |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| void hci_pend_le_list_add(struct hci_conn_params *param, |
| struct list_head *list) |
| { |
| list_add_rcu(¶m->action, list); |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev, |
| bdaddr_t *addr, u8 addr_type) |
| { |
| struct hci_conn_params *params; |
| |
| params = hci_conn_params_lookup(hdev, addr, addr_type); |
| if (params) |
| return params; |
| |
| params = kzalloc(sizeof(*params), GFP_KERNEL); |
| if (!params) { |
| bt_dev_err(hdev, "out of memory"); |
| return NULL; |
| } |
| |
| bacpy(¶ms->addr, addr); |
| params->addr_type = addr_type; |
| |
| list_add(¶ms->list, &hdev->le_conn_params); |
| INIT_LIST_HEAD(¶ms->action); |
| |
| params->conn_min_interval = hdev->le_conn_min_interval; |
| params->conn_max_interval = hdev->le_conn_max_interval; |
| params->conn_latency = hdev->le_conn_latency; |
| params->supervision_timeout = hdev->le_supv_timeout; |
| params->auto_connect = HCI_AUTO_CONN_DISABLED; |
| |
| BT_DBG("addr %pMR (type %u)", addr, addr_type); |
| |
| return params; |
| } |
| |
| void hci_conn_params_free(struct hci_conn_params *params) |
| { |
| hci_pend_le_list_del_init(params); |
| |
| if (params->conn) { |
| hci_conn_drop(params->conn); |
| hci_conn_put(params->conn); |
| } |
| |
| list_del(¶ms->list); |
| kfree(params); |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type) |
| { |
| struct hci_conn_params *params; |
| |
| params = hci_conn_params_lookup(hdev, addr, addr_type); |
| if (!params) |
| return; |
| |
| hci_conn_params_free(params); |
| |
| hci_update_passive_scan(hdev); |
| |
| BT_DBG("addr %pMR (type %u)", addr, addr_type); |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| void hci_conn_params_clear_disabled(struct hci_dev *hdev) |
| { |
| struct hci_conn_params *params, *tmp; |
| |
| list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) { |
| if (params->auto_connect != HCI_AUTO_CONN_DISABLED) |
| continue; |
| |
| /* If trying to establish one time connection to disabled |
| * device, leave the params, but mark them as just once. |
| */ |
| if (params->explicit_connect) { |
| params->auto_connect = HCI_AUTO_CONN_EXPLICIT; |
| continue; |
| } |
| |
| hci_conn_params_free(params); |
| } |
| |
| BT_DBG("All LE disabled connection parameters were removed"); |
| } |
| |
| /* This function requires the caller holds hdev->lock */ |
| static void hci_conn_params_clear_all(struct hci_dev *hdev) |
| { |
| struct hci_conn_params *params, *tmp; |
| |
| list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) |
| hci_conn_params_free(params); |
| |
| BT_DBG("All LE connection parameters were removed"); |
| } |
| |
| /* Copy the Identity Address of the controller. |
| * |
| * If the controller has a public BD_ADDR, then by default use that one. |
| * If this is a LE only controller without a public address, default to |
| * the static random address. |
| * |
| * For debugging purposes it is possible to force controllers with a |
| * public address to use the static random address instead. |
| * |
| * In case BR/EDR has been disabled on a dual-mode controller and |
| * userspace has configured a static address, then that address |
| * becomes the identity address instead of the public BR/EDR address. |
| */ |
| void hci_copy_identity_address(struct hci_dev *hdev, bdaddr_t *bdaddr, |
| u8 *bdaddr_type) |
| { |
| if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) || |
| !bacmp(&hdev->bdaddr, BDADDR_ANY) || |
| (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) && |
| bacmp(&hdev->static_addr, BDADDR_ANY))) { |
| bacpy(bdaddr, &hdev->static_addr); |
| *bdaddr_type = ADDR_LE_DEV_RANDOM; |
| } else { |
| bacpy(bdaddr, &hdev->bdaddr); |
| *bdaddr_type = ADDR_LE_DEV_PUBLIC; |
| } |
| } |
| |
| static void hci_clear_wake_reason(struct hci_dev *hdev) |
| { |
| hci_dev_lock(hdev); |
| |
| hdev->wake_reason = 0; |
| bacpy(&hdev->wake_addr, BDADDR_ANY); |
| hdev->wake_addr_type = 0; |
| |
| hci_dev_unlock(hdev); |
| } |
| |
| static int hci_suspend_notifier(struct notifier_block *nb, unsigned long action, |
| void *data) |
| { |
| struct hci_dev *hdev = |
| container_of(nb, struct hci_dev, suspend_notifier); |
| int ret = 0; |
| |
| /* Userspace has full control of this device. Do nothing. */ |
| if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) |
| return NOTIFY_DONE; |
| |
| /* To avoid a potential race with hci_unregister_dev. */ |
| hci_dev_hold(hdev); |
| |
| if (action == PM_SUSPEND_PREPARE) |
| ret = hci_suspend_dev(hdev); |
| else if (action == PM_POST_SUSPEND) |
| ret = hci_resume_dev(hdev); |
| |
| if (ret) |
| bt_dev_err(hdev, "Suspend notifier action (%lu) failed: %d", |
| action, ret); |
| |
| hci_dev_put(hdev); |
| return NOTIFY_DONE; |
| } |
| |
| /* Alloc HCI device */ |
| struct hci_dev *hci_alloc_dev_priv(int sizeof_priv) |
| { |
| struct hci_dev *hdev; |
| unsigned int alloc_size; |
| |
| alloc_size = sizeof(*hdev); |
| if (sizeof_priv) { |
| /* Fixme: May need ALIGN-ment? */ |
| alloc_size += sizeof_priv; |
| } |
| |
| hdev = kzalloc(alloc_size, GFP_KERNEL); |
| if (!hdev) |
| return NULL; |
| |
| hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); |
| hdev->esco_type = (ESCO_HV1); |
| hdev->link_mode = (HCI_LM_ACCEPT); |
| hdev->num_iac = 0x01; /* One IAC support is mandatory */ |
| hdev->io_capability = 0x03; /* No Input No Output */ |
| hdev->manufacturer = 0xffff; /* Default to internal use */ |
| hdev->inq_tx_power = HCI_TX_POWER_INVALID; |
| hdev->adv_tx_power = HCI_TX_POWER_INVALID; |
| hdev->adv_instance_cnt = 0; |
| hdev->cur_adv_instance = 0x00; |
| hdev->adv_instance_timeout = 0; |
| |
| hdev->advmon_allowlist_duration = 300; |
| hdev->advmon_no_filter_duration = 500; |
| hdev->enable_advmon_interleave_scan = 0x00; /* Default to disable */ |
| |
| hdev->sniff_max_interval = 800; |
| hdev->sniff_min_interval = 80; |
| |
| hdev->le_adv_channel_map = 0x07; |
| hdev->le_adv_min_interval = 0x0800; |
| hdev->le_adv_max_interval = 0x0800; |
| hdev->le_scan_interval = DISCOV_LE_SCAN_INT_FAST; |
| hdev->le_scan_window = DISCOV_LE_SCAN_WIN_FAST; |
| hdev->le_scan_int_suspend = DISCOV_LE_SCAN_INT_SLOW1; |
| hdev->le_scan_window_suspend = DISCOV_LE_SCAN_WIN_SLOW1; |
| hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT; |
| hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN; |
| hdev->le_scan_int_adv_monitor = DISCOV_LE_SCAN_INT_FAST; |
| hdev->le_scan_window_adv_monitor = DISCOV_LE_SCAN_WIN_FAST; |
| hdev->le_scan_int_connect = DISCOV_LE_SCAN_INT_CONN; |
| hdev->le_scan_window_connect = DISCOV_LE_SCAN_WIN_CONN; |
| hdev->le_conn_min_interval = 0x0018; |
| hdev->le_conn_max_interval = 0x0028; |
| hdev->le_conn_latency = 0x0000; |
| hdev->le_supv_timeout = 0x002a; |
| hdev->le_def_tx_len = 0x001b; |
| hdev->le_def_tx_time = 0x0148; |
| hdev->le_max_tx_len = 0x001b; |
| hdev->le_max_tx_time = 0x0148; |
| hdev->le_max_rx_len = 0x001b; |
| hdev->le_max_rx_time = 0x0148; |
| hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE; |
| hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE; |
| hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M; |
| hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M; |
| hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES; |
| hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION; |
| hdev->def_le_autoconnect_timeout = HCI_LE_CONN_TIMEOUT; |
| hdev->min_le_tx_power = HCI_TX_POWER_INVALID; |
| hdev->max_le_tx_power = HCI_TX_POWER_INVALID; |
| |
| hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT; |
| hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT; |
| hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE; |
| hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE; |
| hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT; |
| hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE; |
| |
| /* default 1.28 sec page scan */ |
| hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD; |
| hdev->def_page_scan_int = 0x0800; |
| hdev->def_page_scan_window = 0x0012; |
| |
| mutex_init(&hdev->lock); |
| mutex_init(&hdev->req_lock); |
| |
| ida_init(&hdev->unset_handle_ida); |
| |
| INIT_LIST_HEAD(&hdev->mesh_pending); |
| INIT_LIST_HEAD(&hdev->mgmt_pending); |
| INIT_LIST_HEAD(&hdev->reject_list); |
| INIT_LIST_HEAD(&hdev->accept_list); |
| INIT_LIST_HEAD(&hdev->uuids); |
| INIT_LIST_HEAD(&hdev->link_keys); |
| INIT_LIST_HEAD(&hdev->long_term_keys); |
| INIT_LIST_HEAD(&hdev->identity_resolving_keys); |
| INIT_LIST_HEAD(&hdev->remote_oob_data); |
| INIT_LIST_HEAD(&hdev->le_accept_list); |
| INIT_LIST_HEAD(&hdev->le_resolv_list); |
| INIT_LIST_HEAD(&hdev->le_conn_params); |
| INIT_LIST_HEAD(&hdev->pend_le_conns); |
| INIT_LIST_HEAD(&hdev->pend_le_reports); |
| INIT_LIST_HEAD(&hdev->conn_hash.list); |
| INIT_LIST_HEAD(&hdev->adv_instances); |
| INIT_LIST_HEAD(&hdev->blocked_keys); |
| INIT_LIST_HEAD(&hdev->monitored_devices); |
| |
| INIT_LIST_HEAD(&hdev->local_codecs); |
| INIT_WORK(&hdev->rx_work, hci_rx_work); |
| INIT_WORK(&hdev->cmd_work, hci_cmd_work); |
| INIT_WORK(&hdev->tx_work, hci_tx_work); |
| INIT_WORK(&hdev->power_on, hci_power_on); |
| INIT_WORK(&hdev->error_reset, hci_error_reset); |
| |
| hci_cmd_sync_init(hdev); |
| |
| INIT_DELAYED_WORK(&hdev->power_off, hci_power_off); |
| |
| skb_queue_head_init(&hdev->rx_q); |
| skb_queue_head_init(&hdev->cmd_q); |
| skb_queue_head_init(&hdev->raw_q); |
| |
| init_waitqueue_head(&hdev->req_wait_q); |
| |
| INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout); |
| INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout); |
| |
| hci_devcd_setup(hdev); |
| hci_request_setup(hdev); |
| |
| hci_init_sysfs(hdev); |
| discovery_init(hdev); |
| |
| return hdev; |
| } |
| EXPORT_SYMBOL(hci_alloc_dev_priv); |
| |
| /* Free HCI device */ |
| void hci_free_dev(struct hci_dev *hdev) |
| { |
| /* will free via device release */ |
| put_device(&hdev->dev); |
| } |
| EXPORT_SYMBOL(hci_free_dev); |
| |
| /* Register HCI device */ |
| int hci_register_dev(struct hci_dev *hdev) |
| { |
| int id, error; |
| |
| if (!hdev->open || !hdev->close || !hdev->send) |
| return -EINVAL; |
| |
| id = ida_alloc_max(&hci_index_ida, HCI_MAX_ID - 1, GFP_KERNEL); |
| if (id < 0) |
| return id; |
| |
| error = dev_set_name(&hdev->dev, "hci%u", id); |
| if (error) |
| return error; |
| |
| hdev->name = dev_name(&hdev->dev); |
| hdev->id = id; |
| |
| BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
| |
| hdev->workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, hdev->name); |
| if (!hdev->workqueue) { |
| error = -ENOMEM; |
| goto err; |
| } |
| |
| hdev->req_workqueue = alloc_ordered_workqueue("%s", WQ_HIGHPRI, |
| hdev->name); |
| if (!hdev->req_workqueue) { |
| destroy_workqueue(hdev->workqueue); |
| error = -ENOMEM; |
| goto err; |
| } |
| |
| if (!IS_ERR_OR_NULL(bt_debugfs)) |
| hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs); |
| |
| error = device_add(&hdev->dev); |
| if (error < 0) |
| goto err_wqueue; |
| |
| hci_leds_init(hdev); |
| |
| hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev, |
| RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, |
| hdev); |
| if (hdev->rfkill) { |
| if (rfkill_register(hdev->rfkill) < 0) { |
| rfkill_destroy(hdev->rfkill); |
| hdev->rfkill = NULL; |
| } |
| } |
| |
| if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) |
| hci_dev_set_flag(hdev, HCI_RFKILLED); |
| |
| hci_dev_set_flag(hdev, HCI_SETUP); |
| hci_dev_set_flag(hdev, HCI_AUTO_OFF); |
| |
| /* Assume BR/EDR support until proven otherwise (such as |
| * through reading supported features during init. |
| */ |
| hci_dev_set_flag(hdev, HCI_BREDR_ENABLED); |
| |
| write_lock(&hci_dev_list_lock); |
| list_add(&hdev->list, &hci_dev_list); |
| write_unlock(&hci_dev_list_lock); |
| |
| /* Devices that are marked for raw-only usage are unconfigured |
| * and should not be included in normal operation. |
| */ |
| if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) |
| hci_dev_set_flag(hdev, HCI_UNCONFIGURED); |
| |
| /* Mark Remote Wakeup connection flag as supported if driver has wakeup |
| * callback. |
| */ |
| if (hdev->wakeup) |
| hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP; |
| |
| hci_sock_dev_event(hdev, HCI_DEV_REG); |
| hci_dev_hold(hdev); |
| |
| error = hci_register_suspend_notifier(hdev); |
| if (error) |
| BT_WARN("register suspend notifier failed error:%d\n", error); |
| |
| queue_work(hdev->req_workqueue, &hdev->power_on); |
| |
| idr_init(&hdev->adv_monitors_idr); |
| msft_register(hdev); |
| |
| return id; |
| |
| err_wqueue: |
| debugfs_remove_recursive(hdev->debugfs); |
| destroy_workqueue(hdev->workqueue); |
| destroy_workqueue(hdev->req_workqueue); |
| err: |
| ida_free(&hci_index_ida, hdev->id); |
| |
| return error; |
| } |
| EXPORT_SYMBOL(hci_register_dev); |
| |
| /* Unregister HCI device */ |
| void hci_unregister_dev(struct hci_dev *hdev) |
| { |
| BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus); |
| |
| mutex_lock(&hdev->unregister_lock); |
| hci_dev_set_flag(hdev, HCI_UNREGISTER); |
| mutex_unlock(&hdev->unregister_lock); |
| |
| write_lock(&hci_dev_list_lock); |
| list_del(&hdev->list); |
| write_unlock(&hci_dev_list_lock); |
| |
| cancel_work_sync(&hdev->power_on); |
| |
| hci_cmd_sync_clear(hdev); |
| |
| hci_unregister_suspend_notifier(hdev); |
| |
| hci_dev_do_close(hdev); |
| |
| if (!test_bit(HCI_INIT, &hdev->flags) && |
| !hci_dev_test_flag(hdev, HCI_SETUP) && |
| !hci_dev_test_flag(hdev, HCI_CONFIG)) { |
| hci_dev_lock(hdev); |
| mgmt_index_removed(hdev); |
| hci_dev_unlock(hdev); |
| } |
| |
| /* mgmt_index_removed should take care of emptying the |
| * pending list */ |
| BUG_ON(!list_empty(&hdev->mgmt_pending)); |
| |
| hci_sock_dev_event(hdev, HCI_DEV_UNREG); |
| |
| if (hdev->rfkill) { |
| rfkill_unregister(hdev->rfkill); |
| rfkill_destroy(hdev->rfkill); |
| } |
| |
| device_del(&hdev->dev); |
| /* Actual cleanup is deferred until hci_release_dev(). */ |
| hci_dev_put(hdev); |
| } |
| EXPORT_SYMBOL(hci_unregister_dev); |
| |
| /* Release HCI device */ |
| void hci_release_dev(struct hci_dev *hdev) |
| { |
| debugfs_remove_recursive(hdev->debugfs); |
| kfree_const(hdev->hw_info); |
| kfree_const(hdev->fw_info); |
| |
| destroy_workqueue(hdev->workqueue); |
| destroy_workqueue(hdev->req_workqueue); |
| |
| hci_dev_lock(hdev); |
| hci_bdaddr_list_clear(&hdev->reject_list); |
| hci_bdaddr_list_clear(&hdev->accept_list); |
| hci_uuids_clear(hdev); |
| hci_link_keys_clear(hdev); |
| hci_smp_ltks_clear(hdev); |
| hci_smp_irks_clear(hdev); |
| hci_remote_oob_data_clear(hdev); |
| hci_adv_instances_clear(hdev); |
| hci_adv_monitors_clear(hdev); |
| hci_bdaddr_list_clear(&hdev->le_accept_list); |
| hci_bdaddr_list_clear(&hdev->le_resolv_list); |
| hci_conn_params_clear_all(hdev); |
| hci_discovery_filter_clear(hdev); |
| hci_blocked_keys_clear(hdev); |
| hci_codec_list_clear(&hdev->local_codecs); |
| msft_release(hdev); |
| hci_dev_unlock(hdev); |
| |
| ida_destroy(&hdev->unset_handle_ida); |
| ida_free(&hci_index_ida, hdev->id); |
| kfree_skb(hdev->sent_cmd); |
| kfree_skb(hdev->req_skb); |
| kfree_skb(hdev->recv_event); |
| kfree(hdev); |
| } |
| EXPORT_SYMBOL(hci_release_dev); |
| |
| int hci_register_suspend_notifier(struct hci_dev *hdev) |
| { |
| int ret = 0; |
| |
| if (!hdev->suspend_notifier.notifier_call && |
| !test_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks)) { |
| hdev->suspend_notifier.notifier_call = hci_suspend_notifier; |
| ret = register_pm_notifier(&hdev->suspend_notifier); |
| } |
| |
| return ret; |
| } |
| |
| int hci_unregister_suspend_notifier(struct hci_dev *hdev) |
| { |
| int ret = 0; |
| |
| if (hdev->suspend_notifier.notifier_call) { |
| ret = unregister_pm_notifier(&hdev->suspend_notifier); |
| if (!ret) |
| hdev->suspend_notifier.notifier_call = NULL; |
| } |
| |
| return ret; |
| } |
| |
| /* Cancel ongoing command synchronously: |
| * |
| * - Cancel command timer |
| * - Reset command counter |
| * - Cancel command request |
| */ |
| static void hci_cancel_cmd_sync(struct hci_dev *hdev, int err) |
| { |
| bt_dev_dbg(hdev, "err 0x%2.2x", err); |
| |
| cancel_delayed_work_sync(&hdev->cmd_timer); |
| cancel_delayed_work_sync(&hdev->ncmd_timer); |
| atomic_set(&hdev->cmd_cnt, 1); |
| |
| hci_cmd_sync_cancel_sync(hdev, err); |
| } |
| |
| /* Suspend HCI device */ |
| int hci_suspend_dev(struct hci_dev *hdev) |
| { |
| int ret; |
| |
| bt_dev_dbg(hdev, ""); |
| |
| /* Suspend should only act on when powered. */ |
| if (!hdev_is_powered(hdev) || |
| hci_dev_test_flag(hdev, HCI_UNREGISTER)) |
| return 0; |
| |
| /* If powering down don't attempt to suspend */ |
| if (mgmt_powering_down(hdev)) |
| return 0; |
| |
| /* Cancel potentially blocking sync operation before suspend */ |
| hci_cancel_cmd_sync(hdev, EHOSTDOWN); |
| |
| hci_req_sync_lock(hdev); |
| ret = hci_suspend_sync(hdev); |
| hci_req_sync_unlock(hdev); |
| |
| hci_clear_wake_reason(hdev); |
| mgmt_suspending(hdev, hdev->suspend_state); |
| |
| hci_sock_dev_event(hdev, HCI_DEV_SUSPEND); |
| return ret; |
| } |
| EXPORT_SYMBOL(hci_suspend_dev); |
| |
| /* Resume HCI device */ |
| int hci_resume_dev(struct hci_dev *hdev) |
| { |
| int ret; |
| |
| bt_dev_dbg(hdev, ""); |
| |
| /* Resume should only act on when powered. */ |
| if (!hdev_is_powered(hdev) || |
| hci_dev_test_flag(hdev, HCI_UNREGISTER)) |
| return 0; |
| |
| /* If powering down don't attempt to resume */ |
| if (mgmt_powering_down(hdev)) |
| return 0; |
| |
| hci_req_sync_lock(hdev); |
| ret = hci_resume_sync(hdev); |
| hci_req_sync_unlock(hdev); |
| |
| mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr, |
| hdev->wake_addr_type); |
| |
| hci_sock_dev_event(hdev, HCI_DEV_RESUME); |
| return ret; |
| } |
| EXPORT_SYMBOL(hci_resume_dev); |
| |
| /* Reset HCI device */ |
| int hci_reset_dev(struct hci_dev *hdev) |
| { |
| static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0x01, 0x00 }; |
| struct sk_buff *skb; |
| |
| skb = bt_skb_alloc(3, GFP_ATOMIC); |
| if (!skb) |
| return -ENOMEM; |
| |
| hci_skb_pkt_type(skb) = HCI_EVENT_PKT; |
| skb_put_data(skb, hw_err, 3); |
| |
| bt_dev_err(hdev, "Injecting HCI hardware error event"); |
| |
| /* Send Hardware Error to upper stack */ |
| return hci_recv_frame(hdev, skb); |
| } |
| EXPORT_SYMBOL(hci_reset_dev); |
| |
| /* Receive frame from HCI drivers */ |
| int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| if (!hdev || (!test_bit(HCI_UP, &hdev->flags) |
| && !test_bit(HCI_INIT, &hdev->flags))) { |
| kfree_skb(skb); |
| return -ENXIO; |
| } |
| |
| switch (hci_skb_pkt_type(skb)) { |
| case HCI_EVENT_PKT: |
| break; |
| case HCI_ACLDATA_PKT: |
| /* Detect if ISO packet has been sent as ACL */ |
| if (hci_conn_num(hdev, ISO_LINK)) { |
| __u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle); |
| __u8 type; |
| |
| type = hci_conn_lookup_type(hdev, hci_handle(handle)); |
| if (type == ISO_LINK) |
| hci_skb_pkt_type(skb) = HCI_ISODATA_PKT; |
| } |
| break; |
| case HCI_SCODATA_PKT: |
| break; |
| case HCI_ISODATA_PKT: |
| break; |
| default: |
| kfree_skb(skb); |
| return -EINVAL; |
| } |
| |
| /* Incoming skb */ |
| bt_cb(skb)->incoming = 1; |
| |
| /* Time stamp */ |
| __net_timestamp(skb); |
| |
| skb_queue_tail(&hdev->rx_q, skb); |
| queue_work(hdev->workqueue, &hdev->rx_work); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_recv_frame); |
| |
| /* Receive diagnostic message from HCI drivers */ |
| int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| /* Mark as diagnostic packet */ |
| hci_skb_pkt_type(skb) = HCI_DIAG_PKT; |
| |
| /* Time stamp */ |
| __net_timestamp(skb); |
| |
| skb_queue_tail(&hdev->rx_q, skb); |
| queue_work(hdev->workqueue, &hdev->rx_work); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_recv_diag); |
| |
| void hci_set_hw_info(struct hci_dev *hdev, const char *fmt, ...) |
| { |
| va_list vargs; |
| |
| va_start(vargs, fmt); |
| kfree_const(hdev->hw_info); |
| hdev->hw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs); |
| va_end(vargs); |
| } |
| EXPORT_SYMBOL(hci_set_hw_info); |
| |
| void hci_set_fw_info(struct hci_dev *hdev, const char *fmt, ...) |
| { |
| va_list vargs; |
| |
| va_start(vargs, fmt); |
| kfree_const(hdev->fw_info); |
| hdev->fw_info = kvasprintf_const(GFP_KERNEL, fmt, vargs); |
| va_end(vargs); |
| } |
| EXPORT_SYMBOL(hci_set_fw_info); |
| |
| /* ---- Interface to upper protocols ---- */ |
| |
| int hci_register_cb(struct hci_cb *cb) |
| { |
| BT_DBG("%p name %s", cb, cb->name); |
| |
| mutex_lock(&hci_cb_list_lock); |
| list_add_tail(&cb->list, &hci_cb_list); |
| mutex_unlock(&hci_cb_list_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_register_cb); |
| |
| int hci_unregister_cb(struct hci_cb *cb) |
| { |
| BT_DBG("%p name %s", cb, cb->name); |
| |
| mutex_lock(&hci_cb_list_lock); |
| list_del(&cb->list); |
| mutex_unlock(&hci_cb_list_lock); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(hci_unregister_cb); |
| |
| static int hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| int err; |
| |
| BT_DBG("%s type %d len %d", hdev->name, hci_skb_pkt_type(skb), |
| skb->len); |
| |
| /* Time stamp */ |
| __net_timestamp(skb); |
| |
| /* Send copy to monitor */ |
| hci_send_to_monitor(hdev, skb); |
| |
| if (atomic_read(&hdev->promisc)) { |
| /* Send copy to the sockets */ |
| hci_send_to_sock(hdev, skb); |
| } |
| |
| /* Get rid of skb owner, prior to sending to the driver. */ |
| skb_orphan(skb); |
| |
| if (!test_bit(HCI_RUNNING, &hdev->flags)) { |
| kfree_skb(skb); |
| return -EINVAL; |
| } |
| |
| err = hdev->send(hdev, skb); |
| if (err < 0) { |
| bt_dev_err(hdev, "sending frame failed (%d)", err); |
| kfree_skb(skb); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| /* Send HCI command */ |
| int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, |
| const void *param) |
| { |
| struct sk_buff *skb; |
| |
| BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen); |
| |
| skb = hci_prepare_cmd(hdev, opcode, plen, param); |
| if (!skb) { |
| bt_dev_err(hdev, "no memory for command"); |
| return -ENOMEM; |
| } |
| |
| /* Stand-alone HCI commands must be flagged as |
| * single-command requests. |
| */ |
| bt_cb(skb)->hci.req_flags |= HCI_REQ_START; |
| |
| skb_queue_tail(&hdev->cmd_q, skb); |
| queue_work(hdev->workqueue, &hdev->cmd_work); |
| |
| return 0; |
| } |
| |
| int __hci_cmd_send(struct hci_dev *hdev, u16 opcode, u32 plen, |
| const void *param) |
| { |
| struct sk_buff *skb; |
| |
| if (hci_opcode_ogf(opcode) != 0x3f) { |
| /* A controller receiving a command shall respond with either |
| * a Command Status Event or a Command Complete Event. |
| * Therefore, all standard HCI commands must be sent via the |
| * standard API, using hci_send_cmd or hci_cmd_sync helpers. |
| * Some vendors do not comply with this rule for vendor-specific |
| * commands and do not return any event. We want to support |
| * unresponded commands for such cases only. |
| */ |
| bt_dev_err(hdev, "unresponded command not supported"); |
| return -EINVAL; |
| } |
| |
| skb = hci_prepare_cmd(hdev, opcode, plen, param); |
| if (!skb) { |
| bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)", |
| opcode); |
| return -ENOMEM; |
| } |
| |
| hci_send_frame(hdev, skb); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(__hci_cmd_send); |
| |
| /* Get data from the previously sent command */ |
| static void *hci_cmd_data(struct sk_buff *skb, __u16 opcode) |
| { |
| struct hci_command_hdr *hdr; |
| |
| if (!skb || skb->len < HCI_COMMAND_HDR_SIZE) |
| return NULL; |
| |
| hdr = (void *)skb->data; |
| |
| if (hdr->opcode != cpu_to_le16(opcode)) |
| return NULL; |
| |
| return skb->data + HCI_COMMAND_HDR_SIZE; |
| } |
| |
| /* Get data from the previously sent command */ |
| void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
| { |
| void *data; |
| |
| /* Check if opcode matches last sent command */ |
| data = hci_cmd_data(hdev->sent_cmd, opcode); |
| if (!data) |
| /* Check if opcode matches last request */ |
| data = hci_cmd_data(hdev->req_skb, opcode); |
| |
| return data; |
| } |
| |
| /* Get data from last received event */ |
| void *hci_recv_event_data(struct hci_dev *hdev, __u8 event) |
| { |
| struct hci_event_hdr *hdr; |
| int offset; |
| |
| if (!hdev->recv_event) |
| return NULL; |
| |
| hdr = (void *)hdev->recv_event->data; |
| offset = sizeof(*hdr); |
| |
| if (hdr->evt != event) { |
| /* In case of LE metaevent check the subevent match */ |
| if (hdr->evt == HCI_EV_LE_META) { |
| struct hci_ev_le_meta *ev; |
| |
| ev = (void *)hdev->recv_event->data + offset; |
| offset += sizeof(*ev); |
| if (ev->subevent == event) |
| goto found; |
| } |
| return NULL; |
| } |
| |
| found: |
| bt_dev_dbg(hdev, "event 0x%2.2x", event); |
| |
| return hdev->recv_event->data + offset; |
| } |
| |
| /* Send ACL data */ |
| static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) |
| { |
| struct hci_acl_hdr *hdr; |
| int len = skb->len; |
| |
| skb_push(skb, HCI_ACL_HDR_SIZE); |
| skb_reset_transport_header(skb); |
| hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
| hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
| hdr->dlen = cpu_to_le16(len); |
| } |
| |
| static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue, |
| struct sk_buff *skb, __u16 flags) |
| { |
| struct hci_conn *conn = chan->conn; |
| struct hci_dev *hdev = conn->hdev; |
| struct sk_buff *list; |
| |
| skb->len = skb_headlen(skb); |
| skb->data_len = 0; |
| |
| hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT; |
| |
| hci_add_acl_hdr(skb, conn->handle, flags); |
| |
| list = skb_shinfo(skb)->frag_list; |
| if (!list) { |
| /* Non fragmented */ |
| BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); |
| |
| skb_queue_tail(queue, skb); |
| } else { |
| /* Fragmented */ |
| BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| |
| skb_shinfo(skb)->frag_list = NULL; |
| |
| /* Queue all fragments atomically. We need to use spin_lock_bh |
| * here because of 6LoWPAN links, as there this function is |
| * called from softirq and using normal spin lock could cause |
| * deadlocks. |
| */ |
| spin_lock_bh(&queue->lock); |
| |
| __skb_queue_tail(queue, skb); |
| |
| flags &= ~ACL_START; |
| flags |= ACL_CONT; |
| do { |
| skb = list; list = list->next; |
| |
| hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT; |
| hci_add_acl_hdr(skb, conn->handle, flags); |
| |
| BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| |
| __skb_queue_tail(queue, skb); |
| } while (list); |
| |
| spin_unlock_bh(&queue->lock); |
| } |
| } |
| |
| void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags) |
| { |
| struct hci_dev *hdev = chan->conn->hdev; |
| |
| BT_DBG("%s chan %p flags 0x%4.4x", hdev->name, chan, flags); |
| |
| hci_queue_acl(chan, &chan->data_q, skb, flags); |
| |
| queue_work(hdev->workqueue, &hdev->tx_work); |
| } |
| |
| /* Send SCO data */ |
| void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
| { |
| struct hci_dev *hdev = conn->hdev; |
| struct hci_sco_hdr hdr; |
| |
| BT_DBG("%s len %d", hdev->name, skb->len); |
| |
| hdr.handle = cpu_to_le16(conn->handle); |
| hdr.dlen = skb->len; |
| |
| skb_push(skb, HCI_SCO_HDR_SIZE); |
| skb_reset_transport_header(skb); |
| memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
| |
| hci_skb_pkt_type(skb) = HCI_SCODATA_PKT; |
| |
| skb_queue_tail(&conn->data_q, skb); |
| queue_work(hdev->workqueue, &hdev->tx_work); |
| } |
| |
| /* Send ISO data */ |
| static void hci_add_iso_hdr(struct sk_buff *skb, __u16 handle, __u8 flags) |
| { |
| struct hci_iso_hdr *hdr; |
| int len = skb->len; |
| |
| skb_push(skb, HCI_ISO_HDR_SIZE); |
| skb_reset_transport_header(skb); |
| hdr = (struct hci_iso_hdr *)skb_transport_header(skb); |
| hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
| hdr->dlen = cpu_to_le16(len); |
| } |
| |
| static void hci_queue_iso(struct hci_conn *conn, struct sk_buff_head *queue, |
| struct sk_buff *skb) |
| { |
| struct hci_dev *hdev = conn->hdev; |
| struct sk_buff *list; |
| __u16 flags; |
| |
| skb->len = skb_headlen(skb); |
| skb->data_len = 0; |
| |
| hci_skb_pkt_type(skb) = HCI_ISODATA_PKT; |
| |
| list = skb_shinfo(skb)->frag_list; |
| |
| flags = hci_iso_flags_pack(list ? ISO_START : ISO_SINGLE, 0x00); |
| hci_add_iso_hdr(skb, conn->handle, flags); |
| |
| if (!list) { |
| /* Non fragmented */ |
| BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); |
| |
| skb_queue_tail(queue, skb); |
| } else { |
| /* Fragmented */ |
| BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| |
| skb_shinfo(skb)->frag_list = NULL; |
| |
| __skb_queue_tail(queue, skb); |
| |
| do { |
| skb = list; list = list->next; |
| |
| hci_skb_pkt_type(skb) = HCI_ISODATA_PKT; |
| flags = hci_iso_flags_pack(list ? ISO_CONT : ISO_END, |
| 0x00); |
| hci_add_iso_hdr(skb, conn->handle, flags); |
| |
| BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| |
| __skb_queue_tail(queue, skb); |
| } while (list); |
| } |
| } |
| |
| void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb) |
| { |
| struct hci_dev *hdev = conn->hdev; |
| |
| BT_DBG("%s len %d", hdev->name, skb->len); |
| |
| hci_queue_iso(conn, &conn->data_q, skb); |
| |
| queue_work(hdev->workqueue, &hdev->tx_work); |
| } |
| |
| /* ---- HCI TX task (outgoing data) ---- */ |
| |
| /* HCI Connection scheduler */ |
| static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote) |
| { |
| struct hci_dev *hdev; |
| int cnt, q; |
| |
| if (!conn) { |
| *quote = 0; |
| return; |
| } |
| |
| hdev = conn->hdev; |
| |
| switch (conn->type) { |
| case ACL_LINK: |
| cnt = hdev->acl_cnt; |
| break; |
| case SCO_LINK: |
| case ESCO_LINK: |
| cnt = hdev->sco_cnt; |
| break; |
| case LE_LINK: |
| cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; |
| break; |
| case ISO_LINK: |
| cnt = hdev->iso_mtu ? hdev->iso_cnt : |
| hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt; |
| break; |
| default: |
| cnt = 0; |
| bt_dev_err(hdev, "unknown link type %d", conn->type); |
| } |
| |
| q = cnt / num; |
| *quote = q ? q : 1; |
| } |
| |
| static struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, |
| int *quote) |
| { |
| struct hci_conn_hash *h = &hdev->conn_hash; |
| struct hci_conn *conn = NULL, *c; |
| unsigned int num = 0, min = ~0; |
| |
| /* We don't have to lock device here. Connections are always |
| * added and removed with TX task disabled. */ |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(c, &h->list, list) { |
| if (c->type != type || skb_queue_empty(&c->data_q)) |
| continue; |
| |
| if (c->state != BT_CONNECTED && c->state != BT_CONFIG) |
| continue; |
| |
| num++; |
| |
| if (c->sent < min) { |
| min = c->sent; |
| conn = c; |
| } |
| |
| if (hci_conn_num(hdev, type) == num) |
| break; |
| } |
| |
| rcu_read_unlock(); |
| |
| hci_quote_sent(conn, num, quote); |
| |
| BT_DBG("conn %p quote %d", conn, *quote); |
| return conn; |
| } |
| |
| static void hci_link_tx_to(struct hci_dev *hdev, __u8 type) |
| { |
| struct hci_conn_hash *h = &hdev->conn_hash; |
| struct hci_conn *c; |
| |
| bt_dev_err(hdev, "link tx timeout"); |
| |
| rcu_read_lock(); |
| |
| /* Kill stalled connections */ |
| list_for_each_entry_rcu(c, &h->list, list) { |
| if (c->type == type && c->sent) { |
| bt_dev_err(hdev, "killing stalled connection %pMR", |
| &c->dst); |
| /* hci_disconnect might sleep, so, we have to release |
| * the RCU read lock before calling it. |
| */ |
| rcu_read_unlock(); |
| hci_disconnect(c, HCI_ERROR_REMOTE_USER_TERM); |
| rcu_read_lock(); |
| } |
| } |
| |
| rcu_read_unlock(); |
| } |
| |
| static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type, |
| int *quote) |
| { |
| struct hci_conn_hash *h = &hdev->conn_hash; |
| struct hci_chan *chan = NULL; |
| unsigned int num = 0, min = ~0, cur_prio = 0; |
| struct hci_conn *conn; |
| int conn_num = 0; |
| |
| BT_DBG("%s", hdev->name); |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(conn, &h->list, list) { |
| struct hci_chan *tmp; |
| |
| if (conn->type != type) |
| continue; |
| |
| if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) |
| continue; |
| |
| conn_num++; |
| |
| list_for_each_entry_rcu(tmp, &conn->chan_list, list) { |
| struct sk_buff *skb; |
| |
| if (skb_queue_empty(&tmp->data_q)) |
| continue; |
| |
| skb = skb_peek(&tmp->data_q); |
| if (skb->priority < cur_prio) |
| continue; |
| |
| if (skb->priority > cur_prio) { |
| num = 0; |
| min = ~0; |
| cur_prio = skb->priority; |
| } |
| |
| num++; |
| |
| if (conn->sent < min) { |
| min = conn->sent; |
| chan = tmp; |
| } |
| } |
| |
| if (hci_conn_num(hdev, type) == conn_num) |
| break; |
| } |
| |
| rcu_read_unlock(); |
| |
| if (!chan) |
| return NULL; |
| |
| hci_quote_sent(chan->conn, num, quote); |
| |
| BT_DBG("chan %p quote %d", chan, *quote); |
| return chan; |
| } |
| |
| static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type) |
| { |
| struct hci_conn_hash *h = &hdev->conn_hash; |
| struct hci_conn *conn; |
| int num = 0; |
| |
| BT_DBG("%s", hdev->name); |
| |
| rcu_read_lock(); |
| |
| list_for_each_entry_rcu(conn, &h->list, list) { |
| struct hci_chan *chan; |
| |
| if (conn->type != type) |
| continue; |
| |
| if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG) |
| continue; |
| |
| num++; |
| |
| list_for_each_entry_rcu(chan, &conn->chan_list, list) { |
| struct sk_buff *skb; |
| |
| if (chan->sent) { |
| chan->sent = 0; |
| continue; |
| } |
| |
| if (skb_queue_empty(&chan->data_q)) |
| continue; |
| |
| skb = skb_peek(&chan->data_q); |
| if (skb->priority >= HCI_PRIO_MAX - 1) |
| continue; |
| |
| skb->priority = HCI_PRIO_MAX - 1; |
| |
| BT_DBG("chan %p skb %p promoted to %d", chan, skb, |
| skb->priority); |
| } |
| |
| if (hci_conn_num(hdev, type) == num) |
| break; |
| } |
| |
| rcu_read_unlock(); |
| |
| } |
| |
| static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type) |
| { |
| unsigned long last_tx; |
| |
| if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) |
| return; |
| |
| switch (type) { |
| case LE_LINK: |
| last_tx = hdev->le_last_tx; |
| break; |
| default: |
| last_tx = hdev->acl_last_tx; |
| break; |
| } |
| |
| /* tx timeout must be longer than maximum link supervision timeout |
| * (40.9 seconds) |
| */ |
| if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT)) |
| hci_link_tx_to(hdev, type); |
| } |
| |
| /* Schedule SCO */ |
| static void hci_sched_sco(struct hci_dev *hdev) |
| { |
| struct hci_conn *conn; |
| struct sk_buff *skb; |
| int quote; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (!hci_conn_num(hdev, SCO_LINK)) |
| return; |
| |
| while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { |
| while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| BT_DBG("skb %p len %d", skb, skb->len); |
| hci_send_frame(hdev, skb); |
| |
| conn->sent++; |
| if (conn->sent == ~0) |
| conn->sent = 0; |
| } |
| } |
| } |
| |
| static void hci_sched_esco(struct hci_dev *hdev) |
| { |
| struct hci_conn *conn; |
| struct sk_buff *skb; |
| int quote; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (!hci_conn_num(hdev, ESCO_LINK)) |
| return; |
| |
| while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, |
| "e))) { |
| while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| BT_DBG("skb %p len %d", skb, skb->len); |
| hci_send_frame(hdev, skb); |
| |
| conn->sent++; |
| if (conn->sent == ~0) |
| conn->sent = 0; |
| } |
| } |
| } |
| |
| static void hci_sched_acl_pkt(struct hci_dev *hdev) |
| { |
| unsigned int cnt = hdev->acl_cnt; |
| struct hci_chan *chan; |
| struct sk_buff *skb; |
| int quote; |
| |
| __check_timeout(hdev, cnt, ACL_LINK); |
| |
| while (hdev->acl_cnt && |
| (chan = hci_chan_sent(hdev, ACL_LINK, "e))) { |
| u32 priority = (skb_peek(&chan->data_q))->priority; |
| while (quote-- && (skb = skb_peek(&chan->data_q))) { |
| BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
| skb->len, skb->priority); |
| |
| /* Stop if priority has changed */ |
| if (skb->priority < priority) |
| break; |
| |
| skb = skb_dequeue(&chan->data_q); |
| |
| hci_conn_enter_active_mode(chan->conn, |
| bt_cb(skb)->force_active); |
| |
| hci_send_frame(hdev, skb); |
| hdev->acl_last_tx = jiffies; |
| |
| hdev->acl_cnt--; |
| chan->sent++; |
| chan->conn->sent++; |
| |
| /* Send pending SCO packets right away */ |
| hci_sched_sco(hdev); |
| hci_sched_esco(hdev); |
| } |
| } |
| |
| if (cnt != hdev->acl_cnt) |
| hci_prio_recalculate(hdev, ACL_LINK); |
| } |
| |
| static void hci_sched_acl(struct hci_dev *hdev) |
| { |
| BT_DBG("%s", hdev->name); |
| |
| /* No ACL link over BR/EDR controller */ |
| if (!hci_conn_num(hdev, ACL_LINK)) |
| return; |
| |
| hci_sched_acl_pkt(hdev); |
| } |
| |
| static void hci_sched_le(struct hci_dev *hdev) |
| { |
| struct hci_chan *chan; |
| struct sk_buff *skb; |
| int quote, cnt, tmp; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (!hci_conn_num(hdev, LE_LINK)) |
| return; |
| |
| cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt; |
| |
| __check_timeout(hdev, cnt, LE_LINK); |
| |
| tmp = cnt; |
| while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) { |
| u32 priority = (skb_peek(&chan->data_q))->priority; |
| while (quote-- && (skb = skb_peek(&chan->data_q))) { |
| BT_DBG("chan %p skb %p len %d priority %u", chan, skb, |
| skb->len, skb->priority); |
| |
| /* Stop if priority has changed */ |
| if (skb->priority < priority) |
| break; |
| |
| skb = skb_dequeue(&chan->data_q); |
| |
| hci_send_frame(hdev, skb); |
| hdev->le_last_tx = jiffies; |
| |
| cnt--; |
| chan->sent++; |
| chan->conn->sent++; |
| |
| /* Send pending SCO packets right away */ |
| hci_sched_sco(hdev); |
| hci_sched_esco(hdev); |
| } |
| } |
| |
| if (hdev->le_pkts) |
| hdev->le_cnt = cnt; |
| else |
| hdev->acl_cnt = cnt; |
| |
| if (cnt != tmp) |
| hci_prio_recalculate(hdev, LE_LINK); |
| } |
| |
| /* Schedule CIS */ |
| static void hci_sched_iso(struct hci_dev *hdev) |
| { |
| struct hci_conn *conn; |
| struct sk_buff *skb; |
| int quote, *cnt; |
| |
| BT_DBG("%s", hdev->name); |
| |
| if (!hci_conn_num(hdev, ISO_LINK)) |
| return; |
| |
| cnt = hdev->iso_pkts ? &hdev->iso_cnt : |
| hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt; |
| while (*cnt && (conn = hci_low_sent(hdev, ISO_LINK, "e))) { |
| while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| BT_DBG("skb %p len %d", skb, skb->len); |
| hci_send_frame(hdev, skb); |
| |
| conn->sent++; |
| if (conn->sent == ~0) |
| conn->sent = 0; |
| (*cnt)--; |
| } |
| } |
| } |
| |
| static void hci_tx_work(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work); |
| struct sk_buff *skb; |
| |
| BT_DBG("%s acl %d sco %d le %d iso %d", hdev->name, hdev->acl_cnt, |
| hdev->sco_cnt, hdev->le_cnt, hdev->iso_cnt); |
| |
| if (!hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) { |
| /* Schedule queues and send stuff to HCI driver */ |
| hci_sched_sco(hdev); |
| hci_sched_esco(hdev); |
| hci_sched_iso(hdev); |
| hci_sched_acl(hdev); |
| hci_sched_le(hdev); |
| } |
| |
| /* Send next queued raw (unknown type) packet */ |
| while ((skb = skb_dequeue(&hdev->raw_q))) |
| hci_send_frame(hdev, skb); |
| } |
| |
| /* ----- HCI RX task (incoming data processing) ----- */ |
| |
| /* ACL data packet */ |
| static void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| struct hci_acl_hdr *hdr = (void *) skb->data; |
| struct hci_conn *conn; |
| __u16 handle, flags; |
| |
| skb_pull(skb, HCI_ACL_HDR_SIZE); |
| |
| handle = __le16_to_cpu(hdr->handle); |
| flags = hci_flags(handle); |
| handle = hci_handle(handle); |
| |
| BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len, |
| handle, flags); |
| |
| hdev->stat.acl_rx++; |
| |
| hci_dev_lock(hdev); |
| conn = hci_conn_hash_lookup_handle(hdev, handle); |
| hci_dev_unlock(hdev); |
| |
| if (conn) { |
| hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF); |
| |
| /* Send to upper protocol */ |
| l2cap_recv_acldata(conn, skb, flags); |
| return; |
| } else { |
| bt_dev_err(hdev, "ACL packet for unknown connection handle %d", |
| handle); |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| /* SCO data packet */ |
| static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| struct hci_sco_hdr *hdr = (void *) skb->data; |
| struct hci_conn *conn; |
| __u16 handle, flags; |
| |
| skb_pull(skb, HCI_SCO_HDR_SIZE); |
| |
| handle = __le16_to_cpu(hdr->handle); |
| flags = hci_flags(handle); |
| handle = hci_handle(handle); |
| |
| BT_DBG("%s len %d handle 0x%4.4x flags 0x%4.4x", hdev->name, skb->len, |
| handle, flags); |
| |
| hdev->stat.sco_rx++; |
| |
| hci_dev_lock(hdev); |
| conn = hci_conn_hash_lookup_handle(hdev, handle); |
| hci_dev_unlock(hdev); |
| |
| if (conn) { |
| /* Send to upper protocol */ |
| hci_skb_pkt_status(skb) = flags & 0x03; |
| sco_recv_scodata(conn, skb); |
| return; |
| } else { |
| bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d", |
| handle); |
| } |
| |
| kfree_skb(skb); |
| } |
| |
| static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| struct hci_iso_hdr *hdr; |
| struct hci_conn *conn; |
| __u16 handle, flags; |
| |
| hdr = skb_pull_data(skb, sizeof(*hdr)); |
| if (!hdr) { |
| bt_dev_err(hdev, "ISO packet too small"); |
| goto drop; |
| } |
| |
| handle = __le16_to_cpu(hdr->handle); |
| flags = hci_flags(handle); |
| handle = hci_handle(handle); |
| |
| bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x", skb->len, |
| handle, flags); |
| |
| hci_dev_lock(hdev); |
| conn = hci_conn_hash_lookup_handle(hdev, handle); |
| hci_dev_unlock(hdev); |
| |
| if (!conn) { |
| bt_dev_err(hdev, "ISO packet for unknown connection handle %d", |
| handle); |
| goto drop; |
| } |
| |
| /* Send to upper protocol */ |
| iso_recv(conn, skb, flags); |
| return; |
| |
| drop: |
| kfree_skb(skb); |
| } |
| |
| static bool hci_req_is_complete(struct hci_dev *hdev) |
| { |
| struct sk_buff *skb; |
| |
| skb = skb_peek(&hdev->cmd_q); |
| if (!skb) |
| return true; |
| |
| return (bt_cb(skb)->hci.req_flags & HCI_REQ_START); |
| } |
| |
| static void hci_resend_last(struct hci_dev *hdev) |
| { |
| struct hci_command_hdr *sent; |
| struct sk_buff *skb; |
| u16 opcode; |
| |
| if (!hdev->sent_cmd) |
| return; |
| |
| sent = (void *) hdev->sent_cmd->data; |
| opcode = __le16_to_cpu(sent->opcode); |
| if (opcode == HCI_OP_RESET) |
| return; |
| |
| skb = skb_clone(hdev->sent_cmd, GFP_KERNEL); |
| if (!skb) |
| return; |
| |
| skb_queue_head(&hdev->cmd_q, skb); |
| queue_work(hdev->workqueue, &hdev->cmd_work); |
| } |
| |
| void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status, |
| hci_req_complete_t *req_complete, |
| hci_req_complete_skb_t *req_complete_skb) |
| { |
| struct sk_buff *skb; |
| unsigned long flags; |
| |
| BT_DBG("opcode 0x%04x status 0x%02x", opcode, status); |
| |
| /* If the completed command doesn't match the last one that was |
| * sent we need to do special handling of it. |
| */ |
| if (!hci_sent_cmd_data(hdev, opcode)) { |
| /* Some CSR based controllers generate a spontaneous |
| * reset complete event during init and any pending |
| * command will never be completed. In such a case we |
| * need to resend whatever was the last sent |
| * command. |
| */ |
| if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET) |
| hci_resend_last(hdev); |
| |
| return; |
| } |
| |
| /* If we reach this point this event matches the last command sent */ |
| hci_dev_clear_flag(hdev, HCI_CMD_PENDING); |
| |
| /* If the command succeeded and there's still more commands in |
| * this request the request is not yet complete. |
| */ |
| if (!status && !hci_req_is_complete(hdev)) |
| return; |
| |
| skb = hdev->req_skb; |
| |
| /* If this was the last command in a request the complete |
| * callback would be found in hdev->req_skb instead of the |
| * command queue (hdev->cmd_q). |
| */ |
| if (skb && bt_cb(skb)->hci.req_flags & HCI_REQ_SKB) { |
| *req_complete_skb = bt_cb(skb)->hci.req_complete_skb; |
| return; |
| } |
| |
| if (skb && bt_cb(skb)->hci.req_complete) { |
| *req_complete = bt_cb(skb)->hci.req_complete; |
| return; |
| } |
| |
| /* Remove all pending commands belonging to this request */ |
| spin_lock_irqsave(&hdev->cmd_q.lock, flags); |
| while ((skb = __skb_dequeue(&hdev->cmd_q))) { |
| if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) { |
| __skb_queue_head(&hdev->cmd_q, skb); |
| break; |
| } |
| |
| if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB) |
| *req_complete_skb = bt_cb(skb)->hci.req_complete_skb; |
| else |
| *req_complete = bt_cb(skb)->hci.req_complete; |
| dev_kfree_skb_irq(skb); |
| } |
| spin_unlock_irqrestore(&hdev->cmd_q.lock, flags); |
| } |
| |
| static void hci_rx_work(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work); |
| struct sk_buff *skb; |
| |
| BT_DBG("%s", hdev->name); |
| |
| /* The kcov_remote functions used for collecting packet parsing |
| * coverage information from this background thread and associate |
| * the coverage with the syscall's thread which originally injected |
| * the packet. This helps fuzzing the kernel. |
| */ |
| for (; (skb = skb_dequeue(&hdev->rx_q)); kcov_remote_stop()) { |
| kcov_remote_start_common(skb_get_kcov_handle(skb)); |
| |
| /* Send copy to monitor */ |
| hci_send_to_monitor(hdev, skb); |
| |
| if (atomic_read(&hdev->promisc)) { |
| /* Send copy to the sockets */ |
| hci_send_to_sock(hdev, skb); |
| } |
| |
| /* If the device has been opened in HCI_USER_CHANNEL, |
| * the userspace has exclusive access to device. |
| * When device is HCI_INIT, we still need to process |
| * the data packets to the driver in order |
| * to complete its setup(). |
| */ |
| if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) && |
| !test_bit(HCI_INIT, &hdev->flags)) { |
| kfree_skb(skb); |
| continue; |
| } |
| |
| if (test_bit(HCI_INIT, &hdev->flags)) { |
| /* Don't process data packets in this states. */ |
| switch (hci_skb_pkt_type(skb)) { |
| case HCI_ACLDATA_PKT: |
| case HCI_SCODATA_PKT: |
| case HCI_ISODATA_PKT: |
| kfree_skb(skb); |
| continue; |
| } |
| } |
| |
| /* Process frame */ |
| switch (hci_skb_pkt_type(skb)) { |
| case HCI_EVENT_PKT: |
| BT_DBG("%s Event packet", hdev->name); |
| hci_event_packet(hdev, skb); |
| break; |
| |
| case HCI_ACLDATA_PKT: |
| BT_DBG("%s ACL data packet", hdev->name); |
| hci_acldata_packet(hdev, skb); |
| break; |
| |
| case HCI_SCODATA_PKT: |
| BT_DBG("%s SCO data packet", hdev->name); |
| hci_scodata_packet(hdev, skb); |
| break; |
| |
| case HCI_ISODATA_PKT: |
| BT_DBG("%s ISO data packet", hdev->name); |
| hci_isodata_packet(hdev, skb); |
| break; |
| |
| default: |
| kfree_skb(skb); |
| break; |
| } |
| } |
| } |
| |
| static void hci_send_cmd_sync(struct hci_dev *hdev, struct sk_buff *skb) |
| { |
| int err; |
| |
| bt_dev_dbg(hdev, "skb %p", skb); |
| |
| kfree_skb(hdev->sent_cmd); |
| |
| hdev->sent_cmd = skb_clone(skb, GFP_KERNEL); |
| if (!hdev->sent_cmd) { |
| skb_queue_head(&hdev->cmd_q, skb); |
| queue_work(hdev->workqueue, &hdev->cmd_work); |
| return; |
| } |
| |
| err = hci_send_frame(hdev, skb); |
| if (err < 0) { |
| hci_cmd_sync_cancel_sync(hdev, -err); |
| return; |
| } |
| |
| if (hci_req_status_pend(hdev) && |
| !hci_dev_test_and_set_flag(hdev, HCI_CMD_PENDING)) { |
| kfree_skb(hdev->req_skb); |
| hdev->req_skb = skb_clone(hdev->sent_cmd, GFP_KERNEL); |
| } |
| |
| atomic_dec(&hdev->cmd_cnt); |
| } |
| |
| static void hci_cmd_work(struct work_struct *work) |
| { |
| struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work); |
| struct sk_buff *skb; |
| |
| BT_DBG("%s cmd_cnt %d cmd queued %d", hdev->name, |
| atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q)); |
| |
| /* Send queued commands */ |
| if (atomic_read(&hdev->cmd_cnt)) { |
| skb = skb_dequeue(&hdev->cmd_q); |
| if (!skb) |
| return; |
| |
| hci_send_cmd_sync(hdev, skb); |
| |
| rcu_read_lock(); |
| if (test_bit(HCI_RESET, &hdev->flags) || |
| hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE)) |
| cancel_delayed_work(&hdev->cmd_timer); |
| else |
| queue_delayed_work(hdev->workqueue, &hdev->cmd_timer, |
| HCI_CMD_TIMEOUT); |
| rcu_read_unlock(); |
| } |
| } |