diff options
Diffstat (limited to 'net/bluetooth/hci_core.c')
| -rw-r--r-- | net/bluetooth/hci_core.c | 4158 |
1 files changed, 4158 insertions, 0 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c new file mode 100644 index 000000000..6a1db678d --- /dev/null +++ b/net/bluetooth/hci_core.c @@ -0,0 +1,4158 @@ +/* + 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; + + BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, 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: + mgmt_discovering(hdev, 1); + break; + case DISCOVERY_RESOLVING: + break; + case DISCOVERY_STOPPING: + break; + } +} + +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 (hdev->dev_type != HCI_PRIMARY) { + 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 (hdev->dev_type != HCI_PRIMARY) { + 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; + + strcpy(di.name, hdev->name); + di.bdaddr = hdev->bdaddr; + di.type = (hdev->bus & 0x0f) | ((hdev->dev_type & 0x03) << 4); + 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_rfkill_set_block(void *data, bool blocked) +{ + struct hci_dev *hdev = data; + + 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_set_flag(hdev, HCI_RFKILLED); + if (!hci_dev_test_flag(hdev, HCI_SETUP) && + !hci_dev_test_flag(hdev, HCI_CONFIG)) + 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) || + (hdev->dev_type == HCI_PRIMARY && + !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); + + 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)) + return; + + hci_dev_do_open(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->sent_cmd) { + struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data; + u16 opcode = __le16_to_cpu(sent->opcode); + + bt_dev_err(hdev, "command 0x%4.4x tx timeout", opcode); + } 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; + 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 = 0x0060; + hdev->le_scan_window = 0x0030; + hdev->le_scan_int_suspend = 0x0400; + hdev->le_scan_window_suspend = 0x0012; + hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT; + hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN; + hdev->le_scan_int_adv_monitor = 0x0060; + hdev->le_scan_window_adv_monitor = 0x0030; + hdev->le_scan_int_connect = 0x0060; + hdev->le_scan_window_connect = 0x0060; + 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_AUTOCONN_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); + + 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_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; + + /* Do not allow HCI_AMP devices to register at index 0, + * so the index can be used as the AMP controller ID. + */ + switch (hdev->dev_type) { + case HCI_PRIMARY: + id = ida_simple_get(&hci_index_ida, 0, HCI_MAX_ID, GFP_KERNEL); + break; + case HCI_AMP: + id = ida_simple_get(&hci_index_ida, 1, HCI_MAX_ID, GFP_KERNEL); + break; + default: + return -EINVAL; + } + + 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); + + if (hdev->dev_type == HCI_PRIMARY) { + /* 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_simple_remove(&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); + + msft_unregister(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); + hci_dev_unlock(hdev); + + ida_simple_remove(&hci_index_ida, hdev->id); + kfree_skb(hdev->sent_cmd); + 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; +} + +/* 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; + + 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 */ +void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) +{ + struct hci_command_hdr *hdr; + + if (!hdev->sent_cmd) + return NULL; + + hdr = (void *) hdev->sent_cmd->data; + + if (hdr->opcode != cpu_to_le16(opcode)) + return NULL; + + BT_DBG("%s opcode 0x%4.4x", hdev->name, opcode); + + return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; +} + +/* 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; + + switch (hdev->dev_type) { + case HCI_PRIMARY: + hci_add_acl_hdr(skb, conn->handle, flags); + break; + case HCI_AMP: + hci_add_acl_hdr(skb, chan->handle, flags); + break; + default: + bt_dev_err(hdev, "unknown dev_type %d", hdev->dev_type); + return; + } + + 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 AMP_LINK: + cnt = hdev->block_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(c, HCI_ERROR_REMOTE_USER_TERM); + } + } + + 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 inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb) +{ + /* Calculate count of blocks used by this packet */ + return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len); +} + +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_blk(struct hci_dev *hdev) +{ + unsigned int cnt = hdev->block_cnt; + struct hci_chan *chan; + struct sk_buff *skb; + int quote; + u8 type; + + BT_DBG("%s", hdev->name); + + if (hdev->dev_type == HCI_AMP) + type = AMP_LINK; + else + type = ACL_LINK; + + __check_timeout(hdev, cnt, type); + + while (hdev->block_cnt > 0 && + (chan = hci_chan_sent(hdev, type, "e))) { + u32 priority = (skb_peek(&chan->data_q))->priority; + while (quote > 0 && (skb = skb_peek(&chan->data_q))) { + int blocks; + + 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); + + blocks = __get_blocks(hdev, skb); + if (blocks > hdev->block_cnt) + return; + + hci_conn_enter_active_mode(chan->conn, + bt_cb(skb)->force_active); + + hci_send_frame(hdev, skb); + hdev->acl_last_tx = jiffies; + + hdev->block_cnt -= blocks; + quote -= blocks; + + chan->sent += blocks; + chan->conn->sent += blocks; + } + } + + if (cnt != hdev->block_cnt) + hci_prio_recalculate(hdev, type); +} + +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) && hdev->dev_type == HCI_PRIMARY) + return; + + /* No AMP link over AMP controller */ + if (!hci_conn_num(hdev, AMP_LINK) && hdev->dev_type == HCI_AMP) + return; + + switch (hdev->flow_ctl_mode) { + case HCI_FLOW_CTL_MODE_PACKET_BASED: + hci_sched_acl_pkt(hdev); + break; + + case HCI_FLOW_CTL_MODE_BLOCK_BASED: + hci_sched_acl_blk(hdev); + break; + } +} + +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 */ + bt_cb(skb)->sco.pkt_status = 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; + + /* If this was the last command in a request the complete + * callback would be found in hdev->sent_cmd instead of the + * command queue (hdev->cmd_q). + */ + if (bt_cb(hdev->sent_cmd)->hci.req_flags & HCI_REQ_SKB) { + *req_complete_skb = bt_cb(hdev->sent_cmd)->hci.req_complete_skb; + return; + } + + if (bt_cb(hdev->sent_cmd)->hci.req_complete) { + *req_complete = bt_cb(hdev->sent_cmd)->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_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; + + kfree_skb(hdev->sent_cmd); + + hdev->sent_cmd = skb_clone(skb, GFP_KERNEL); + if (hdev->sent_cmd) { + int res; + if (hci_req_status_pend(hdev)) + hci_dev_set_flag(hdev, HCI_CMD_PENDING); + atomic_dec(&hdev->cmd_cnt); + + res = hci_send_frame(hdev, skb); + if (res < 0) + __hci_cmd_sync_cancel(hdev, -res); + + 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(); + } else { + skb_queue_head(&hdev->cmd_q, skb); + queue_work(hdev->workqueue, &hdev->cmd_work); + } + } +} |