/*
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 <linux/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_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);
/* Get HCI device by index.
* Device is held on return. */
static struct hci_dev *__hci_dev_get(int index, int *srcu_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);
if (srcu_index)
*srcu_index = srcu_read_lock(&d->srcu);
break ;
}
}
read_unlock(&hci_dev_list_lock);
return hdev;
}
struct hci_dev *hci_dev_get(int index)
{
return __hci_dev_get(index, NULL);
}
static struct hci_dev *hci_dev_get_srcu(int index, int *srcu_index)
{
return __hci_dev_get(index, srcu_index);
}
static void hci_dev_put_srcu(struct hci_dev *hdev, int srcu_index)
{
srcu_read_unlock(&hdev->srcu, srcu_index);
hci_dev_put(hdev);
}
/* ---- Inquiry support ---- */
bool hci_discovery_active(struct hci_dev *hdev)
{
struct discovery_state *discov = &hdev->discovery;
switch (discov->state) {
case DISCOVERY_FINDING:
case DISCOVERY_RESOLVING:
return true ;
default :
return false ;
}
}
void hci_discovery_set_state(struct hci_dev *hdev, int state)
{
int old_state = hdev->discovery.state;
if (old_state == state)
return ;
hdev->discovery.state = state;
switch (state) {
case DISCOVERY_STOPPED:
hci_update_passive_scan(hdev);
if (old_state != DISCOVERY_STARTING)
mgmt_discovering(hdev, 0 );
break ;
case DISCOVERY_STARTING:
break ;
case DISCOVERY_FINDING:
mgmt_discovering(hdev, 1 );
break ;
case DISCOVERY_RESOLVING:
break ;
case DISCOVERY_STOPPING:
break ;
}
bt_dev_dbg(hdev, "state %u -> %u" , old_state, state);
}
void hci_inquiry_cache_flush(struct hci_dev *hdev)
{
struct discovery_state *cache = &hdev->discovery;
struct inquiry_entry *p, *n;
list_for_each_entry_safe(p, n, &cache->all, all) {
list_del(&p->all);
kfree(p);
}
INIT_LIST_HEAD(&cache->unknown);
INIT_LIST_HEAD(&cache->resolve);
}
struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev,
bdaddr_t *bdaddr)
{
struct discovery_state *cache = &hdev->discovery;
struct inquiry_entry *e;
BT_DBG("cache %p, %pMR" , cache, bdaddr);
list_for_each_entry(e, &cache->all, all) {
if (!bacmp(&e->data.bdaddr, bdaddr))
return e;
}
return NULL;
}
struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
bdaddr_t *bdaddr)
{
struct discovery_state *cache = &hdev->discovery;
struct inquiry_entry *e;
BT_DBG("cache %p, %pMR" , cache, bdaddr);
list_for_each_entry(e, &cache->unknown, list) {
if (!bacmp(&e->data.bdaddr, bdaddr))
return e;
}
return NULL;
}
struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
bdaddr_t *bdaddr,
int state)
{
struct discovery_state *cache = &hdev->discovery;
struct inquiry_entry *e;
BT_DBG("cache %p bdaddr %pMR state %d" , cache, bdaddr, state);
list_for_each_entry(e, &cache->resolve, list) {
if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
return e;
if (!bacmp(&e->data.bdaddr, bdaddr))
return e;
}
return NULL;
}
void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
struct inquiry_entry *ie)
{
struct discovery_state *cache = &hdev->discovery;
struct list_head *pos = &cache->resolve;
struct inquiry_entry *p;
list_del(&ie->list);
list_for_each_entry(p, &cache->resolve, list) {
if (p->name_state != NAME_PENDING &&
abs(p->data.rssi) >= abs(ie->data.rssi))
break ;
pos = &p->list;
}
list_add(&ie->list, pos);
}
u32 hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
bool name_known)
{
struct discovery_state *cache = &hdev->discovery;
struct inquiry_entry *ie;
u32 flags = 0 ;
BT_DBG("cache %p, %pMR" , cache, &data->bdaddr);
hci_remove_remote_oob_data(hdev, &data->bdaddr, BDADDR_BREDR);
if (!data->ssp_mode)
flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
if (ie) {
if (!ie->data.ssp_mode)
flags |= MGMT_DEV_FOUND_LEGACY_PAIRING;
if (ie->name_state == NAME_NEEDED &&
data->rssi != ie->data.rssi) {
ie->data.rssi = data->rssi;
hci_inquiry_cache_update_resolve(hdev, ie);
}
goto update;
}
/* Entry not in the cache. Add new one. */
ie = kzalloc(sizeof (*ie), GFP_KERNEL);
if (!ie) {
flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
goto done;
}
list_add(&ie->all, &cache->all);
if (name_known) {
ie->name_state = NAME_KNOWN;
} else {
ie->name_state = NAME_NOT_KNOWN;
list_add(&ie->list, &cache->unknown);
}
update:
if (name_known && ie->name_state != NAME_KNOWN &&
ie->name_state != NAME_PENDING) {
ie->name_state = NAME_KNOWN;
list_del(&ie->list);
}
memcpy(&ie->data, data, sizeof (*data));
ie->timestamp = jiffies;
cache->timestamp = jiffies;
if (ie->name_state == NAME_NOT_KNOWN)
flags |= MGMT_DEV_FOUND_CONFIRM_NAME;
done:
return flags;
}
static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
{
struct discovery_state *cache = &hdev->discovery;
struct inquiry_info *info = (struct inquiry_info *) buf;
struct inquiry_entry *e;
int copied = 0 ;
list_for_each_entry(e, &cache->all, all) {
struct inquiry_data *data = &e->data;
if (copied >= num)
break ;
bacpy(&info->bdaddr, &data->bdaddr);
info->pscan_rep_mode = data->pscan_rep_mode;
info->pscan_period_mode = data->pscan_period_mode;
info->pscan_mode = data->pscan_mode;
memcpy(info->dev_class, data->dev_class, 3 );
info->clock_offset = data->clock_offset;
info++;
copied++;
}
BT_DBG("cache %p, copied %d" , cache, copied);
return copied;
}
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;
__u8 *buf;
if (copy_from_user(&ir, ptr, sizeof (ir)))
return -EFAULT;
hdev = hci_dev_get(ir.dev_id);
if (!hdev)
return -ENODEV;
if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
err = -EBUSY;
goto done;
}
if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
err = -EOPNOTSUPP;
goto done;
}
if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
err = -EOPNOTSUPP;
goto done;
}
/* Restrict maximum inquiry length to 60 seconds */
if (ir.length > 60 ) {
err = -EINVAL;
goto done;
}
hci_dev_lock(hdev);
if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
inquiry_cache_empty(hdev) || ir.flags & IREQ_CACHE_FLUSH) {
hci_inquiry_cache_flush(hdev);
do_inquiry = 1 ;
}
hci_dev_unlock(hdev);
if (do_inquiry) {
hci_req_sync_lock(hdev);
err = hci_inquiry_sync(hdev, ir.length, ir.num_rsp);
hci_req_sync_unlock(hdev);
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, srcu_index;
hdev = hci_dev_get_srcu(dev, &srcu_index);
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_srcu(hdev, srcu_index);
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;
__le16 policy;
int err = 0 ;
if (copy_from_user(&dr, arg, sizeof (dr)))
return -EFAULT;
hdev = hci_dev_get(dr.dev_id);
if (!hdev)
return -ENODEV;
if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
err = -EBUSY;
goto done;
}
if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) {
err = -EOPNOTSUPP;
goto done;
}
if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED)) {
err = -EOPNOTSUPP;
goto done;
}
switch (cmd) {
case HCISETAUTH:
err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_AUTH_ENABLE,
1 , &dr.dev_opt, HCI_CMD_TIMEOUT);
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_cmd_sync_status(hdev,
HCI_OP_WRITE_AUTH_ENABLE,
1 , &dr.dev_opt,
HCI_CMD_TIMEOUT);
if (err)
break ;
}
err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_ENCRYPT_MODE,
1 , &dr.dev_opt, HCI_CMD_TIMEOUT);
break ;
case HCISETSCAN:
err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_SCAN_ENABLE,
1 , &dr.dev_opt, HCI_CMD_TIMEOUT);
/* 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:
policy = cpu_to_le16(dr.dev_opt);
err = hci_cmd_sync_status(hdev, HCI_OP_WRITE_DEF_LINK_POLICY,
2 , &policy, HCI_CMD_TIMEOUT);
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 , 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;
dl = kzalloc(struct_size(dl, dev_req, dev_num), GFP_KERNEL);
if (!dl)
return -ENOMEM;
dl->dev_num = dev_num;
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;
err = copy_to_user(arg, dl, struct_size(dl, dev_req, n));
kfree(dl);
return err ? -EFAULT : 0 ;
}
int hci_get_dev_info(void __user *arg)
{
struct hci_dev *hdev;
struct hci_dev_info di;
unsigned long flags;
int err = 0 ;
if (copy_from_user(&di, arg, sizeof (di)))
return -EFAULT;
hdev = hci_dev_get(di.dev_id);
if (!hdev)
return -ENODEV;
/* When the auto-off is configured it means the transport
* is running , but in that case still indicate that the
* device is actually down .
*/
if (hci_dev_test_flag(hdev, HCI_AUTO_OFF))
flags = hdev->flags & ~BIT(HCI_UP);
else
flags = hdev->flags;
strscpy(di.name, hdev->name, sizeof (di.name));
di.bdaddr = hdev->bdaddr;
di.type = (hdev->bus & 0 x0f);
di.flags = flags;
di.pkt_type = hdev->pkt_type;
if (lmp_bredr_capable(hdev)) {
di.acl_mtu = hdev->acl_mtu;
di.acl_pkts = hdev->acl_pkts;
di.sco_mtu = hdev->sco_mtu;
di.sco_pkts = hdev->sco_pkts;
} else {
di.acl_mtu = hdev->le_mtu;
di.acl_pkts = hdev->le_pkts;
di.sco_mtu = 0 ;
di.sco_pkts = 0 ;
}
di.link_policy = hdev->link_policy;
di.link_mode = hdev->link_mode;
memcpy(&di.stat, &hdev->stat, sizeof (di.stat));
memcpy(&di.features, &hdev->features, sizeof (di.features));
if (copy_to_user(arg, &di, sizeof (di)))
err = -EFAULT;
hci_dev_put(hdev);
return err;
}
/* ---- Interface to HCI drivers ---- */
static int hci_dev_do_poweroff(struct hci_dev *hdev)
{
int err;
BT_DBG("%s %p" , hdev->name, hdev);
hci_req_sync_lock(hdev);
err = hci_set_powered_sync(hdev, false );
hci_req_sync_unlock(hdev);
return err;
}
static int hci_rfkill_set_block(void *data, bool blocked)
{
struct hci_dev *hdev = data;
int err;
BT_DBG("%p name %s blocked %d" , hdev, hdev->name, blocked);
if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
return -EBUSY;
if (blocked == hci_dev_test_flag(hdev, HCI_RFKILLED))
return 0 ;
if (blocked) {
hci_dev_set_flag(hdev, HCI_RFKILLED);
if (!hci_dev_test_flag(hdev, HCI_SETUP) &&
!hci_dev_test_flag(hdev, HCI_CONFIG)) {
err = hci_dev_do_poweroff(hdev);
if (err) {
bt_dev_err(hdev, "Error when powering off device on rfkill (%d)" ,
err);
/* Make sure the device is still closed even if
* anything during power off sequence ( eg .
* disconnecting devices ) failed .
*/
hci_dev_do_close(hdev);
}
}
} else {
hci_dev_clear_flag(hdev, HCI_RFKILLED);
}
return 0 ;
}
static const struct rfkill_ops hci_rfkill_ops = {
.set_block = hci_rfkill_set_block,
};
static void hci_power_on(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
int err;
BT_DBG("%s" , hdev->name);
if (test_bit(HCI_UP, &hdev->flags) &&
hci_dev_test_flag(hdev, HCI_MGMT) &&
hci_dev_test_and_clear_flag(hdev, HCI_AUTO_OFF)) {
cancel_delayed_work(&hdev->power_off);
err = hci_powered_update_sync(hdev);
mgmt_power_on(hdev, err);
return ;
}
err = hci_dev_do_open(hdev);
if (err < 0 ) {
hci_dev_lock(hdev);
mgmt_set_powered_failed(hdev, err);
hci_dev_unlock(hdev);
return ;
}
/* During the HCI setup phase, a few error conditions are
* ignored and they need to be checked now . If they are still
* valid , it is important to turn the device back off .
*/
if (hci_dev_test_flag(hdev, HCI_RFKILLED) ||
hci_dev_test_flag(hdev, HCI_UNCONFIGURED) ||
(!bacmp(&hdev->bdaddr, BDADDR_ANY) &&
!bacmp(&hdev->static_addr, BDADDR_ANY))) {
hci_dev_clear_flag(hdev, HCI_AUTO_OFF);
hci_dev_do_close(hdev);
} else if (hci_dev_test_flag(hdev, HCI_AUTO_OFF)) {
queue_delayed_work(hdev->req_workqueue, &hdev->power_off,
HCI_AUTO_OFF_TIMEOUT);
}
if (hci_dev_test_and_clear_flag(hdev, HCI_SETUP)) {
/* For unconfigured devices, set the HCI_RAW flag
* so that userspace can easily identify them .
*/
if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
set_bit(HCI_RAW, &hdev->flags);
/* For fully configured devices, this will send
* the Index Added event . For unconfigured devices ,
* it will send Unconfigued Index Added event .
*
* Devices with HCI_QUIRK_RAW_DEVICE are ignored
* and no event will be send .
*/
mgmt_index_added(hdev);
} else if (hci_dev_test_and_clear_flag(hdev, HCI_CONFIG)) {
/* When the controller is now configured, then it
* is important to clear the HCI_RAW flag .
*/
if (!hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
clear_bit(HCI_RAW, &hdev->flags);
/* Powering on the controller with HCI_CONFIG set only
* happens with the transition from unconfigured to
* configured . This will send the Index Added event .
*/
mgmt_index_added(hdev);
}
}
static void hci_power_off(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev,
power_off.work);
BT_DBG("%s" , hdev->name);
hci_dev_do_close(hdev);
}
static void hci_error_reset(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev, error_reset);
hci_dev_hold(hdev);
BT_DBG("%s" , hdev->name);
if (hdev->hw_error)
hdev->hw_error(hdev, hdev->hw_error_code);
else
bt_dev_err(hdev, "hardware error 0x%2.2x" , hdev->hw_error_code);
if (!hci_dev_do_close(hdev))
hci_dev_do_open(hdev);
hci_dev_put(hdev);
}
void hci_uuids_clear(struct hci_dev *hdev)
{
struct bt_uuid *uuid, *tmp;
list_for_each_entry_safe(uuid, tmp, &hdev->uuids, list) {
list_del(&uuid->list);
kfree(uuid);
}
}
void hci_link_keys_clear(struct hci_dev *hdev)
{
struct link_key *key, *tmp;
list_for_each_entry_safe(key, tmp, &hdev->link_keys, list) {
list_del_rcu(&key->list);
kfree_rcu(key, rcu);
}
}
void hci_smp_ltks_clear(struct hci_dev *hdev)
{
struct smp_ltk *k, *tmp;
list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
list_del_rcu(&k->list);
kfree_rcu(k, rcu);
}
}
void hci_smp_irks_clear(struct hci_dev *hdev)
{
struct smp_irk *k, *tmp;
list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
list_del_rcu(&k->list);
kfree_rcu(k, rcu);
}
}
void hci_blocked_keys_clear(struct hci_dev *hdev)
{
struct blocked_key *b, *tmp;
list_for_each_entry_safe(b, tmp, &hdev->blocked_keys, list) {
list_del_rcu(&b->list);
kfree_rcu(b, rcu);
}
}
bool hci_is_blocked_key(struct hci_dev *hdev, u8 type, u8 val[16 ])
{
bool blocked = false ;
struct blocked_key *b;
rcu_read_lock();
list_for_each_entry_rcu(b, &hdev->blocked_keys, list) {
if (b->type == type && !memcmp(b->val, val, sizeof (b->val))) {
blocked = true ;
break ;
}
}
rcu_read_unlock();
return blocked;
}
struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
{
struct link_key *k;
rcu_read_lock();
list_for_each_entry_rcu(k, &hdev->link_keys, list) {
if (bacmp(bdaddr, &k->bdaddr) == 0 ) {
rcu_read_unlock();
if (hci_is_blocked_key(hdev,
HCI_BLOCKED_KEY_TYPE_LINKKEY,
k->val)) {
bt_dev_warn_ratelimited(hdev,
"Link key blocked for %pMR" ,
&k->bdaddr);
return NULL;
}
return k;
}
}
rcu_read_unlock();
return NULL;
}
static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
u8 key_type, u8 old_key_type)
{
/* Legacy key */
if (key_type < 0 x03)
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 == 0 xff)
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 > 0 x01 && conn->remote_auth > 0 x01)
return true ;
/* Local side had dedicated bonding as requirement */
if (conn->auth_type == 0 x02 || conn->auth_type == 0 x03)
return true ;
/* Remote side had dedicated bonding as requirement */
if (conn->remote_auth == 0 x02 || conn->remote_auth == 0 x03)
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 ] & 0 xc0) != 0 xc0)
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;
break ;
}
}
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 : 0 xff;
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 == 0 xff) && old_key_type == 0 xff) {
type = HCI_LK_COMBINATION;
if (conn)
conn->key_type = type;
}
bacpy(&key->bdaddr, bdaddr);
memcpy(key->val, val, HCI_LINK_KEY_SIZE);
key->pin_len = pin_len;
if (type == HCI_LK_CHANGED_COMBINATION)
key->type = old_key_type;
else
key->type = type;
if (persistent)
*persistent = hci_persistent_key(hdev, conn, type,
old_key_type);
return key;
}
struct smp_ltk *hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr,
u8 addr_type, u8 type, u8 authenticated,
u8 tk[16 ], u8 enc_size, __le16 ediv, __le64 rand)
{
struct smp_ltk *key, *old_key;
u8 role = ltk_role(type);
old_key = hci_find_ltk(hdev, bdaddr, addr_type, role);
if (old_key)
key = old_key;
else {
key = kzalloc(sizeof (*key), GFP_KERNEL);
if (!key)
return NULL;
list_add_rcu(&key->list, &hdev->long_term_keys);
}
bacpy(&key->bdaddr, bdaddr);
key->bdaddr_type = addr_type;
memcpy(key->val, tk, sizeof (key->val));
key->authenticated = authenticated;
key->ediv = ediv;
key->rand = rand;
key->enc_size = enc_size;
key->type = type;
return key;
}
struct smp_irk *hci_add_irk(struct hci_dev *hdev, bdaddr_t *bdaddr,
u8 addr_type, u8 val[16 ], bdaddr_t *rpa)
{
struct smp_irk *irk;
irk = hci_find_irk_by_addr(hdev, bdaddr, addr_type);
if (!irk) {
irk = kzalloc(sizeof (*irk), GFP_KERNEL);
if (!irk)
return NULL;
bacpy(&irk->bdaddr, bdaddr);
irk->addr_type = addr_type;
list_add_rcu(&irk->list, &hdev->identity_resolving_keys);
}
memcpy(irk->val, val, 16 );
bacpy(&irk->rpa, rpa);
return irk;
}
int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
{
struct link_key *key;
key = hci_find_link_key(hdev, bdaddr);
if (!key)
return -ENOENT;
BT_DBG("%s removing %pMR" , hdev->name, bdaddr);
list_del_rcu(&key->list);
kfree_rcu(key, rcu);
return 0 ;
}
int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type)
{
struct smp_ltk *k, *tmp;
int removed = 0 ;
list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type)
continue ;
BT_DBG("%s removing %pMR" , hdev->name, bdaddr);
list_del_rcu(&k->list);
kfree_rcu(k, rcu);
removed++;
}
return removed ? 0 : -ENOENT;
}
void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type)
{
struct smp_irk *k, *tmp;
list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) {
if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type)
continue ;
BT_DBG("%s removing %pMR" , hdev->name, bdaddr);
list_del_rcu(&k->list);
kfree_rcu(k, rcu);
}
}
bool hci_bdaddr_is_paired(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
{
struct smp_ltk *k;
struct smp_irk *irk;
u8 addr_type;
if (type == BDADDR_BREDR) {
if (hci_find_link_key(hdev, bdaddr))
return true ;
return false ;
}
/* Convert to HCI addr type which struct smp_ltk uses */
if (type == BDADDR_LE_PUBLIC)
addr_type = ADDR_LE_DEV_PUBLIC;
else
addr_type = ADDR_LE_DEV_RANDOM;
irk = hci_get_irk(hdev, bdaddr, addr_type);
if (irk) {
bdaddr = &irk->bdaddr;
addr_type = irk->addr_type;
}
rcu_read_lock();
list_for_each_entry_rcu(k, &hdev->long_term_keys, list) {
if (k->bdaddr_type == addr_type && !bacmp(bdaddr, &k->bdaddr)) {
rcu_read_unlock();
return true ;
}
}
rcu_read_unlock();
return false ;
}
/* HCI command timer function */
static void hci_cmd_timeout(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev,
cmd_timer.work);
if (hdev->req_skb) {
u16 opcode = hci_skb_opcode(hdev->req_skb);
bt_dev_err(hdev, "command 0x%4.4x tx timeout" , opcode);
hci_cmd_sync_cancel_sync(hdev, ETIMEDOUT);
} else {
bt_dev_err(hdev, "command tx timeout" );
}
if (hdev->reset)
hdev->reset(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 = 0 x03;
} else {
memset(data->hash192, 0 , sizeof (data->hash192));
memset(data->rand192, 0 , sizeof (data->rand192));
if (hash256 && rand256)
data->present = 0 x02;
else
data->present = 0 x00;
}
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 = 0 x01;
}
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_find_adv_sid(struct hci_dev *hdev, u8 sid)
{
struct adv_info *adv;
list_for_each_entry(adv, &hdev->adv_instances, list) {
if (adv->sid == sid)
return adv;
}
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 = 0 x00;
}
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) {
disable_delayed_work(&hdev->adv_instance_expire);
hdev->adv_instance_timeout = 0 ;
}
list_for_each_entry_safe(adv_instance, n, &hdev->adv_instances, list) {
disable_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 = 0 x00;
}
static void adv_instance_rpa_expired(struct work_struct *work)
{
struct adv_info *adv_instance = container_of(work, struct adv_info,
rpa_expired_cb.work);
BT_DBG("" );
adv_instance->rpa_expired = true ;
}
/* This function requires the caller holds hdev->lock */
struct adv_info *hci_add_adv_instance(struct hci_dev *hdev, u8 instance,
u32 flags, u16 adv_data_len, u8 *adv_data,
u16 scan_rsp_len, u8 *scan_rsp_data,
u16 timeout, u16 duration, s8 tx_power,
u32 min_interval, u32 max_interval,
u8 mesh_handle)
{
struct adv_info *adv;
adv = hci_find_adv_instance(hdev, instance);
if (adv) {
memset(adv->adv_data, 0 , sizeof (adv->adv_data));
memset(adv->scan_rsp_data, 0 , sizeof (adv->scan_rsp_data));
memset(adv->per_adv_data, 0 , sizeof (adv->per_adv_data));
} else {
if (hdev->adv_instance_cnt >= hdev->le_num_of_adv_sets ||
instance < 1 || instance > hdev->le_num_of_adv_sets + 1 )
return ERR_PTR(-EOVERFLOW);
adv = kzalloc(sizeof (*adv), GFP_KERNEL);
if (!adv)
return ERR_PTR(-ENOMEM);
adv->pending = true ;
adv->instance = instance;
/* If controller support only one set and the instance is set to
* 1 then there is no option other than using handle 0 x00 .
*/
if (hdev->le_num_of_adv_sets == 1 && instance == 1 )
adv->handle = 0 x00;
else
adv->handle = instance;
list_add(&adv->list, &hdev->adv_instances);
hdev->adv_instance_cnt++;
}
adv->flags = flags;
adv->min_interval = min_interval;
adv->max_interval = max_interval;
adv->tx_power = tx_power;
/* Defining a mesh_handle changes the timing units to ms,
* rather than seconds , and ties the instance to the requested
* mesh_tx queue .
*/
adv->mesh = mesh_handle;
hci_set_adv_instance_data(hdev, instance, adv_data_len, adv_data,
scan_rsp_len, scan_rsp_data);
adv->timeout = timeout;
adv->remaining_time = timeout;
if (duration == 0 )
adv->duration = hdev->def_multi_adv_rotation_duration;
else
adv->duration = duration;
INIT_DELAYED_WORK(&adv->rpa_expired_cb, adv_instance_rpa_expired);
BT_DBG("%s for %dMR" , hdev->name, instance);
return adv;
}
/* This function requires the caller holds hdev->lock */
struct adv_info *hci_add_per_instance(struct hci_dev *hdev, u8 instance, u8 sid,
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->sid = sid;
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 == 0 x00) {
/* 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 == 0 x00)
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--;
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 ;
}
/* 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);
switch (action) {
case PM_HIBERNATION_PREPARE:
case PM_SUSPEND_PREPARE:
ret = hci_suspend_dev(hdev);
break ;
case PM_POST_HIBERNATION:
case PM_POST_SUSPEND:
ret = hci_resume_dev(hdev);
break ;
}
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;
if (init_srcu_struct(&hdev->srcu)) {
kfree(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 = 0 x01; /* One IAC support is mandatory */
hdev->io_capability = 0 x03; /* No Input No Output */
hdev->manufacturer = 0 xffff; /* 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 = 0 x00;
hdev->adv_instance_timeout = 0 ;
hdev->advmon_allowlist_duration = 300 ;
hdev->advmon_no_filter_duration = 500 ;
hdev->enable_advmon_interleave_scan = 0 x00; /* Default to disable */
hdev->sniff_max_interval = 800 ;
hdev->sniff_min_interval = 80 ;
hdev->le_adv_channel_map = 0 x07;
hdev->le_adv_min_interval = 0 x0800;
hdev->le_adv_max_interval = 0 x0800;
hdev->le_scan_interval = DISCOV_LE_SCAN_INT_FAST;
hdev->le_scan_window = DISCOV_LE_SCAN_WIN_FAST;
hdev->le_scan_int_suspend = DISCOV_LE_SCAN_INT_SLOW1;
hdev->le_scan_window_suspend = DISCOV_LE_SCAN_WIN_SLOW1;
hdev->le_scan_int_discovery = DISCOV_LE_SCAN_INT;
hdev->le_scan_window_discovery = DISCOV_LE_SCAN_WIN;
hdev->le_scan_int_adv_monitor = DISCOV_LE_SCAN_INT_FAST;
hdev->le_scan_window_adv_monitor = DISCOV_LE_SCAN_WIN_FAST;
hdev->le_scan_int_connect = DISCOV_LE_SCAN_INT_CONN;
hdev->le_scan_window_connect = DISCOV_LE_SCAN_WIN_CONN;
hdev->le_conn_min_interval = 0 x0018;
hdev->le_conn_max_interval = 0 x0028;
hdev->le_conn_latency = 0 x0000;
hdev->le_supv_timeout = 0 x002a;
hdev->le_def_tx_len = 0 x001b;
hdev->le_def_tx_time = 0 x0148;
hdev->le_max_tx_len = 0 x001b;
hdev->le_max_tx_time = 0 x0148;
hdev->le_max_rx_len = 0 x001b;
hdev->le_max_rx_time = 0 x0148;
hdev->le_max_key_size = SMP_MAX_ENC_KEY_SIZE;
hdev->le_min_key_size = SMP_MIN_ENC_KEY_SIZE;
hdev->le_tx_def_phys = HCI_LE_SET_PHY_1M;
hdev->le_rx_def_phys = HCI_LE_SET_PHY_1M;
hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES;
hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION;
hdev->def_le_autoconnect_timeout = HCI_LE_CONN_TIMEOUT;
hdev->min_le_tx_power = HCI_TX_POWER_INVALID;
hdev->max_le_tx_power = HCI_TX_POWER_INVALID;
hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT;
hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT;
hdev->conn_info_min_age = DEFAULT_CONN_INFO_MIN_AGE;
hdev->conn_info_max_age = DEFAULT_CONN_INFO_MAX_AGE;
hdev->auth_payload_timeout = DEFAULT_AUTH_PAYLOAD_TIMEOUT;
hdev->min_enc_key_size = HCI_MIN_ENC_KEY_SIZE;
/* default 1.28 sec page scan */
hdev->def_page_scan_type = PAGE_SCAN_TYPE_STANDARD;
hdev->def_page_scan_int = 0 x0800;
hdev->def_page_scan_window = 0 x0012;
mutex_init(&hdev->lock);
mutex_init(&hdev->req_lock);
mutex_init(&hdev->mgmt_pending_lock);
ida_init(&hdev->unset_handle_ida);
INIT_LIST_HEAD(&hdev->mesh_pending);
INIT_LIST_HEAD(&hdev->mgmt_pending);
INIT_LIST_HEAD(&hdev->reject_list);
INIT_LIST_HEAD(&hdev->accept_list);
INIT_LIST_HEAD(&hdev->uuids);
INIT_LIST_HEAD(&hdev->link_keys);
INIT_LIST_HEAD(&hdev->long_term_keys);
INIT_LIST_HEAD(&hdev->identity_resolving_keys);
INIT_LIST_HEAD(&hdev->remote_oob_data);
INIT_LIST_HEAD(&hdev->le_accept_list);
INIT_LIST_HEAD(&hdev->le_resolv_list);
INIT_LIST_HEAD(&hdev->le_conn_params);
INIT_LIST_HEAD(&hdev->pend_le_conns);
INIT_LIST_HEAD(&hdev->pend_le_reports);
INIT_LIST_HEAD(&hdev->conn_hash.list);
INIT_LIST_HEAD(&hdev->adv_instances);
INIT_LIST_HEAD(&hdev->blocked_keys);
INIT_LIST_HEAD(&hdev->monitored_devices);
INIT_LIST_HEAD(&hdev->local_codecs);
INIT_WORK(&hdev->rx_work, hci_rx_work);
INIT_WORK(&hdev->cmd_work, hci_cmd_work);
INIT_WORK(&hdev->tx_work, hci_tx_work);
INIT_WORK(&hdev->power_on, hci_power_on);
INIT_WORK(&hdev->error_reset, hci_error_reset);
hci_cmd_sync_init(hdev);
INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
skb_queue_head_init(&hdev->rx_q);
skb_queue_head_init(&hdev->cmd_q);
skb_queue_head_init(&hdev->raw_q);
init_waitqueue_head(&hdev->req_wait_q);
INIT_DELAYED_WORK(&hdev->cmd_timer, hci_cmd_timeout);
INIT_DELAYED_WORK(&hdev->ncmd_timer, hci_ncmd_timeout);
hci_devcd_setup(hdev);
hci_init_sysfs(hdev);
discovery_init(hdev);
return hdev;
}
EXPORT_SYMBOL(hci_alloc_dev_priv);
/* Free HCI device */
void hci_free_dev(struct hci_dev *hdev)
{
/* will free via device release */
put_device(&hdev->dev);
}
EXPORT_SYMBOL(hci_free_dev);
/* Register HCI device */
int hci_register_dev(struct hci_dev *hdev)
{
int id, error;
if (!hdev->open || !hdev->close || !hdev->send)
return -EINVAL;
id = ida_alloc_max(&hci_index_ida, HCI_MAX_ID - 1 , GFP_KERNEL);
if (id < 0 )
return id;
error = dev_set_name(&hdev->dev, "hci%u" , id);
if (error)
return error;
hdev->name = dev_name(&hdev->dev);
hdev->id = id;
BT_DBG("%p name %s bus %d" , hdev, hdev->name, hdev->bus);
hdev->workqueue = alloc_ordered_workqueue("%s" , WQ_HIGHPRI, hdev->name);
if (!hdev->workqueue) {
error = -ENOMEM;
goto err;
}
hdev->req_workqueue = alloc_ordered_workqueue("%s" , WQ_HIGHPRI,
hdev->name);
if (!hdev->req_workqueue) {
destroy_workqueue(hdev->workqueue);
error = -ENOMEM;
goto err;
}
if (!IS_ERR_OR_NULL(bt_debugfs))
hdev->debugfs = debugfs_create_dir(hdev->name, bt_debugfs);
error = device_add(&hdev->dev);
if (error < 0 )
goto err_wqueue;
hci_leds_init(hdev);
hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops,
hdev);
if (hdev->rfkill) {
if (rfkill_register(hdev->rfkill) < 0 ) {
rfkill_destroy(hdev->rfkill);
hdev->rfkill = NULL;
}
}
if (hdev->rfkill && rfkill_blocked(hdev->rfkill))
hci_dev_set_flag(hdev, HCI_RFKILLED);
hci_dev_set_flag(hdev, HCI_SETUP);
hci_dev_set_flag(hdev, HCI_AUTO_OFF);
/* Assume BR/EDR support until proven otherwise (such as
* through reading supported features during init .
*/
hci_dev_set_flag(hdev, HCI_BREDR_ENABLED);
write_lock(&hci_dev_list_lock);
list_add(&hdev->list, &hci_dev_list);
write_unlock(&hci_dev_list_lock);
/* Devices that are marked for raw-only usage are unconfigured
* and should not be included in normal operation .
*/
if (hci_test_quirk(hdev, HCI_QUIRK_RAW_DEVICE))
hci_dev_set_flag(hdev, HCI_UNCONFIGURED);
/* Mark Remote Wakeup connection flag as supported if driver has wakeup
* callback .
*/
if (hdev->wakeup)
hdev->conn_flags |= HCI_CONN_FLAG_REMOTE_WAKEUP;
hci_sock_dev_event(hdev, HCI_DEV_REG);
hci_dev_hold(hdev);
error = hci_register_suspend_notifier(hdev);
if (error)
BT_WARN("register suspend notifier failed error:%d\n" , error);
queue_work(hdev->req_workqueue, &hdev->power_on);
idr_init(&hdev->adv_monitors_idr);
msft_register(hdev);
return id;
err_wqueue:
debugfs_remove_recursive(hdev->debugfs);
destroy_workqueue(hdev->workqueue);
destroy_workqueue(hdev->req_workqueue);
err:
ida_free(&hci_index_ida, hdev->id);
return error;
}
EXPORT_SYMBOL(hci_register_dev);
/* Unregister HCI device */
void hci_unregister_dev(struct hci_dev *hdev)
{
BT_DBG("%p name %s bus %d" , hdev, hdev->name, hdev->bus);
mutex_lock(&hdev->unregister_lock);
hci_dev_set_flag(hdev, HCI_UNREGISTER);
mutex_unlock(&hdev->unregister_lock);
write_lock(&hci_dev_list_lock);
list_del(&hdev->list);
write_unlock(&hci_dev_list_lock);
synchronize_srcu(&hdev->srcu);
cleanup_srcu_struct(&hdev->srcu);
disable_work_sync(&hdev->rx_work);
disable_work_sync(&hdev->cmd_work);
disable_work_sync(&hdev->tx_work);
disable_work_sync(&hdev->power_on);
disable_work_sync(&hdev->error_reset);
hci_cmd_sync_clear(hdev);
hci_unregister_suspend_notifier(hdev);
hci_dev_do_close(hdev);
if (!test_bit(HCI_INIT, &hdev->flags) &&
!hci_dev_test_flag(hdev, HCI_SETUP) &&
!hci_dev_test_flag(hdev, HCI_CONFIG)) {
hci_dev_lock(hdev);
mgmt_index_removed(hdev);
hci_dev_unlock(hdev);
}
/* mgmt_index_removed should take care of emptying the
* pending list */
BUG_ON(!list_empty(&hdev->mgmt_pending));
hci_sock_dev_event(hdev, HCI_DEV_UNREG);
if (hdev->rfkill) {
rfkill_unregister(hdev->rfkill);
rfkill_destroy(hdev->rfkill);
}
device_del(&hdev->dev);
/* Actual cleanup is deferred until hci_release_dev(). */
hci_dev_put(hdev);
}
EXPORT_SYMBOL(hci_unregister_dev);
/* Release HCI device */
void hci_release_dev(struct hci_dev *hdev)
{
debugfs_remove_recursive(hdev->debugfs);
kfree_const(hdev->hw_info);
kfree_const(hdev->fw_info);
destroy_workqueue(hdev->workqueue);
destroy_workqueue(hdev->req_workqueue);
hci_dev_lock(hdev);
hci_bdaddr_list_clear(&hdev->reject_list);
hci_bdaddr_list_clear(&hdev->accept_list);
hci_uuids_clear(hdev);
hci_link_keys_clear(hdev);
hci_smp_ltks_clear(hdev);
hci_smp_irks_clear(hdev);
hci_remote_oob_data_clear(hdev);
hci_adv_instances_clear(hdev);
hci_adv_monitors_clear(hdev);
hci_bdaddr_list_clear(&hdev->le_accept_list);
hci_bdaddr_list_clear(&hdev->le_resolv_list);
hci_conn_params_clear_all(hdev);
hci_discovery_filter_clear(hdev);
hci_blocked_keys_clear(hdev);
hci_codec_list_clear(&hdev->local_codecs);
msft_release(hdev);
hci_dev_unlock(hdev);
ida_destroy(&hdev->unset_handle_ida);
ida_free(&hci_index_ida, hdev->id);
kfree_skb(hdev->sent_cmd);
kfree_skb(hdev->req_skb);
kfree_skb(hdev->recv_event);
kfree(hdev);
}
EXPORT_SYMBOL(hci_release_dev);
int hci_register_suspend_notifier(struct hci_dev *hdev)
{
int ret = 0 ;
if (!hdev->suspend_notifier.notifier_call &&
!hci_test_quirk(hdev, HCI_QUIRK_NO_SUSPEND_NOTIFIER)) {
hdev->suspend_notifier.notifier_call = hci_suspend_notifier;
ret = register_pm_notifier(&hdev->suspend_notifier);
}
return ret;
}
int hci_unregister_suspend_notifier(struct hci_dev *hdev)
{
int ret = 0 ;
if (hdev->suspend_notifier.notifier_call) {
ret = unregister_pm_notifier(&hdev->suspend_notifier);
if (!ret)
hdev->suspend_notifier.notifier_call = NULL;
}
return ret;
}
/* Cancel ongoing command synchronously:
*
* - Cancel command timer
* - Reset command counter
* - Cancel command request
*/
static void hci_cancel_cmd_sync(struct hci_dev *hdev, int err)
{
bt_dev_dbg(hdev, "err 0x%2.2x" , err);
if (hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
disable_delayed_work_sync(&hdev->cmd_timer);
disable_delayed_work_sync(&hdev->ncmd_timer);
} else {
cancel_delayed_work_sync(&hdev->cmd_timer);
cancel_delayed_work_sync(&hdev->ncmd_timer);
}
atomic_set(&hdev->cmd_cnt, 1 );
hci_cmd_sync_cancel_sync(hdev, err);
}
/* Suspend HCI device */
int hci_suspend_dev(struct hci_dev *hdev)
{
int ret;
bt_dev_dbg(hdev, "" );
/* Suspend should only act on when powered. */
if (!hdev_is_powered(hdev) ||
hci_dev_test_flag(hdev, HCI_UNREGISTER))
return 0 ;
/* If powering down don't attempt to suspend */
if (mgmt_powering_down(hdev))
return 0 ;
/* Cancel potentially blocking sync operation before suspend */
hci_cancel_cmd_sync(hdev, EHOSTDOWN);
hci_req_sync_lock(hdev);
ret = hci_suspend_sync(hdev);
hci_req_sync_unlock(hdev);
hci_clear_wake_reason(hdev);
mgmt_suspending(hdev, hdev->suspend_state);
hci_sock_dev_event(hdev, HCI_DEV_SUSPEND);
return ret;
}
EXPORT_SYMBOL(hci_suspend_dev);
/* Resume HCI device */
int hci_resume_dev(struct hci_dev *hdev)
{
int ret;
bt_dev_dbg(hdev, "" );
/* Resume should only act on when powered. */
if (!hdev_is_powered(hdev) ||
hci_dev_test_flag(hdev, HCI_UNREGISTER))
return 0 ;
/* If powering down don't attempt to resume */
if (mgmt_powering_down(hdev))
return 0 ;
hci_req_sync_lock(hdev);
ret = hci_resume_sync(hdev);
hci_req_sync_unlock(hdev);
mgmt_resuming(hdev, hdev->wake_reason, &hdev->wake_addr,
hdev->wake_addr_type);
hci_sock_dev_event(hdev, HCI_DEV_RESUME);
return ret;
}
EXPORT_SYMBOL(hci_resume_dev);
/* Reset HCI device */
int hci_reset_dev(struct hci_dev *hdev)
{
static const u8 hw_err[] = { HCI_EV_HARDWARE_ERROR, 0 x01, 0 x00 };
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);
static u8 hci_dev_classify_pkt_type(struct hci_dev *hdev, struct sk_buff *skb)
{
if (hdev->classify_pkt_type)
return hdev->classify_pkt_type(hdev, skb);
return hci_skb_pkt_type(skb);
}
/* Receive frame from HCI drivers */
int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
{
u8 dev_pkt_type;
if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
&& !test_bit(HCI_INIT, &hdev->flags))) {
kfree_skb(skb);
return -ENXIO;
}
/* Check if the driver agree with packet type classification */
dev_pkt_type = hci_dev_classify_pkt_type(hdev, skb);
if (hci_skb_pkt_type(skb) != dev_pkt_type) {
hci_skb_pkt_type(skb) = dev_pkt_type;
}
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, CIS_LINK) ||
hci_conn_num(hdev, BIS_LINK) ||
hci_conn_num(hdev, PA_LINK)) {
__u16 handle = __le16_to_cpu(hci_acl_hdr(skb)->handle);
__u8 type;
type = hci_conn_lookup_type(hdev, hci_handle(handle));
if (type == CIS_LINK || type == BIS_LINK ||
type == PA_LINK)
hci_skb_pkt_type(skb) = HCI_ISODATA_PKT;
}
break ;
case HCI_SCODATA_PKT:
break ;
case HCI_ISODATA_PKT:
break ;
case HCI_DRV_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;
}
if (hci_skb_pkt_type(skb) == HCI_DRV_PKT) {
/* Intercept HCI Drv packet here and don't go with hdev->send
* callback .
*/
err = hci_drv_process_cmd(hdev, skb);
kfree_skb(skb);
return err;
}
err = hdev->send(hdev, skb);
if (err < 0 ) {
bt_dev_err(hdev, "sending frame failed (%d)" , err);
kfree_skb(skb);
return err;
}
return 0 ;
}
static int hci_send_conn_frame(struct hci_dev *hdev, struct hci_conn *conn,
struct sk_buff *skb)
{
hci_conn_tx_queue(conn, skb);
return hci_send_frame(hdev, skb);
}
/* 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_cmd_sync_alloc(hdev, opcode, plen, param, NULL);
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) != 0 x3f) {
/* 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_cmd_sync_alloc(hdev, opcode, plen, param, NULL);
if (!skb) {
bt_dev_err(hdev, "no memory for command (opcode 0x%4.4x)" ,
opcode);
return -ENOMEM;
}
hci_send_frame(hdev, skb);
return 0 ;
}
EXPORT_SYMBOL(__hci_cmd_send);
/* Get data from the previously sent command */
static void *hci_cmd_data(struct sk_buff *skb, __u16 opcode)
{
struct hci_command_hdr *hdr;
if (!skb || skb->len < HCI_COMMAND_HDR_SIZE)
return NULL;
hdr = (void *)skb->data;
if (hdr->opcode != cpu_to_le16(opcode))
return NULL;
return skb->data + HCI_COMMAND_HDR_SIZE;
}
/* Get data from the previously sent command */
void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
{
void *data;
/* Check if opcode matches last sent command */
data = hci_cmd_data(hdev->sent_cmd, opcode);
if (!data)
/* Check if opcode matches last request */
data = hci_cmd_data(hdev->req_skb, opcode);
return data;
}
/* Get data from last received event */
void *hci_recv_event_data(struct hci_dev *hdev, __u8 event)
{
struct hci_event_hdr *hdr;
int offset;
if (!hdev->recv_event)
return NULL;
hdr = (void *)hdev->recv_event->data;
offset = sizeof (*hdr);
if (hdr->evt != event) {
/* In case of LE metaevent check the subevent match */
if (hdr->evt == HCI_EV_LE_META) {
struct hci_ev_le_meta *ev;
ev = (void *)hdev->recv_event->data + offset;
offset += sizeof (*ev);
if (ev->subevent == event)
goto found;
}
return NULL;
}
found:
bt_dev_dbg(hdev, "event 0x%2.2x" , event);
return hdev->recv_event->data + offset;
}
/* Send ACL data */
static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
{
struct hci_acl_hdr *hdr;
int len = skb->len;
skb_push(skb, HCI_ACL_HDR_SIZE);
skb_reset_transport_header(skb);
hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
hdr->dlen = cpu_to_le16(len);
}
static void hci_queue_acl(struct hci_chan *chan, struct sk_buff_head *queue,
struct sk_buff *skb, __u16 flags)
{
struct hci_conn *conn = chan->conn;
struct hci_dev *hdev = conn->hdev;
struct sk_buff *list;
skb->len = skb_headlen(skb);
skb->data_len = 0 ;
hci_skb_pkt_type(skb) = HCI_ACLDATA_PKT;
hci_add_acl_hdr(skb, conn->handle, flags);
list = skb_shinfo(skb)->frag_list;
if (!list) {
/* Non fragmented */
BT_DBG("%s nonfrag skb %p len %d" , hdev->name, skb, skb->len);
skb_queue_tail(queue, skb);
} else {
/* Fragmented */
BT_DBG("%s frag %p len %d" , hdev->name, skb, skb->len);
skb_shinfo(skb)->frag_list = NULL;
/* Queue all fragments atomically. We need to use spin_lock_bh
* here because of 6 LoWPAN 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, 0 x00);
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,
0 x00);
hci_add_iso_hdr(skb, conn->handle, flags);
BT_DBG("%s frag %p len %d" , hdev->name, skb, skb->len);
__skb_queue_tail(queue, skb);
} while (list);
}
}
void hci_send_iso(struct hci_conn *conn, struct sk_buff *skb)
{
struct hci_dev *hdev = conn->hdev;
BT_DBG("%s len %d" , hdev->name, skb->len);
hci_queue_iso(conn, &conn->data_q, skb);
queue_work(hdev->workqueue, &hdev->tx_work);
}
/* ---- HCI TX task (outgoing data) ---- */
/* HCI Connection scheduler */
static inline void hci_quote_sent(struct hci_conn *conn, int num, int *quote)
{
struct hci_dev *hdev;
int cnt, q;
if (!conn) {
*quote = 0 ;
return ;
}
hdev = conn->hdev;
switch (conn->type) {
case ACL_LINK:
cnt = hdev->acl_cnt;
break ;
case SCO_LINK:
case ESCO_LINK:
cnt = hdev->sco_cnt;
break ;
case LE_LINK:
cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
break ;
case CIS_LINK:
case BIS_LINK:
case PA_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" );
hci_dev_lock(hdev);
/* Kill stalled connections */
list_for_each_entry(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);
}
}
hci_dev_unlock(hdev);
}
static struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
int *quote)
{
struct hci_conn_hash *h = &hdev->conn_hash;
struct hci_chan *chan = NULL;
unsigned int num = 0 , min = ~0 , cur_prio = 0 ;
struct hci_conn *conn;
int conn_num = 0 ;
BT_DBG("%s" , hdev->name);
rcu_read_lock();
list_for_each_entry_rcu(conn, &h->list, list) {
struct hci_chan *tmp;
if (conn->type != type)
continue ;
if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
continue ;
conn_num++;
list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
struct sk_buff *skb;
if (skb_queue_empty(&tmp->data_q))
continue ;
skb = skb_peek(&tmp->data_q);
if (skb->priority < cur_prio)
continue ;
if (skb->priority > cur_prio) {
num = 0 ;
min = ~0 ;
cur_prio = skb->priority;
}
num++;
if (conn->sent < min) {
min = conn->sent;
chan = tmp;
}
}
if (hci_conn_num(hdev, type) == conn_num)
break ;
}
rcu_read_unlock();
if (!chan)
return NULL;
hci_quote_sent(chan->conn, num, quote);
BT_DBG("chan %p quote %d" , chan, *quote);
return chan;
}
static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
{
struct hci_conn_hash *h = &hdev->conn_hash;
struct hci_conn *conn;
int num = 0 ;
BT_DBG("%s" , hdev->name);
rcu_read_lock();
list_for_each_entry_rcu(conn, &h->list, list) {
struct hci_chan *chan;
if (conn->type != type)
continue ;
if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
continue ;
num++;
list_for_each_entry_rcu(chan, &conn->chan_list, list) {
struct sk_buff *skb;
if (chan->sent) {
chan->sent = 0 ;
continue ;
}
if (skb_queue_empty(&chan->data_q))
continue ;
skb = skb_peek(&chan->data_q);
if (skb->priority >= HCI_PRIO_MAX - 1 )
continue ;
skb->priority = HCI_PRIO_MAX - 1 ;
BT_DBG("chan %p skb %p promoted to %d" , chan, skb,
skb->priority);
}
if (hci_conn_num(hdev, type) == num)
break ;
}
rcu_read_unlock();
}
static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type)
{
unsigned long last_tx;
if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
return ;
switch (type) {
case LE_LINK:
last_tx = hdev->le_last_tx;
break ;
default :
last_tx = hdev->acl_last_tx;
break ;
}
/* tx timeout must be longer than maximum link supervision timeout
* ( 40 . 9 seconds )
*/
if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT))
hci_link_tx_to(hdev, type);
}
/* Schedule SCO */
static void hci_sched_sco(struct hci_dev *hdev, __u8 type)
{
struct hci_conn *conn;
struct sk_buff *skb;
int quote, *cnt;
unsigned int pkts = hdev->sco_pkts;
bt_dev_dbg(hdev, "type %u" , type);
if (!hci_conn_num(hdev, type) || !pkts)
return ;
/* Use sco_pkts if flow control has not been enabled which will limit
* the amount of buffer sent in a row .
*/
if (!hci_dev_test_flag(hdev, HCI_SCO_FLOWCTL))
cnt = &pkts;
else
cnt = &hdev->sco_cnt;
while (*cnt && (conn = hci_low_sent(hdev, type, "e))) {
while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
BT_DBG("skb %p len %d" , skb, skb->len);
hci_send_conn_frame(hdev, conn, skb);
conn->sent++;
if (conn->sent == ~0 )
conn->sent = 0 ;
(*cnt)--;
}
}
/* Rescheduled if all packets were sent and flow control is not enabled
* as there could be more packets queued that could not be sent and
* since no HCI_EV_NUM_COMP_PKTS event will be generated the reschedule
* needs to be forced .
*/
if (!pkts && !hci_dev_test_flag(hdev, HCI_SCO_FLOWCTL))
queue_work(hdev->workqueue, &hdev->tx_work);
}
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_conn_frame(hdev, chan->conn, skb);
hdev->acl_last_tx = jiffies;
hdev->acl_cnt--;
chan->sent++;
chan->conn->sent++;
/* Send pending SCO packets right away */
hci_sched_sco(hdev, SCO_LINK);
hci_sched_sco(hdev, ESCO_LINK);
}
}
if (cnt != hdev->acl_cnt)
hci_prio_recalculate(hdev, ACL_LINK);
}
static void hci_sched_acl(struct hci_dev *hdev)
{
BT_DBG("%s" , hdev->name);
/* No ACL link over BR/EDR controller */
if (!hci_conn_num(hdev, ACL_LINK))
return ;
hci_sched_acl_pkt(hdev);
}
static void hci_sched_le(struct hci_dev *hdev)
{
struct hci_chan *chan;
struct sk_buff *skb;
int quote, *cnt, tmp;
BT_DBG("%s" , hdev->name);
if (!hci_conn_num(hdev, LE_LINK))
return ;
cnt = hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
__check_timeout(hdev, *cnt, LE_LINK);
tmp = *cnt;
while (*cnt && (chan = hci_chan_sent(hdev, LE_LINK, "e))) {
u32 priority = (skb_peek(&chan->data_q))->priority;
while (quote-- && (skb = skb_peek(&chan->data_q))) {
BT_DBG("chan %p skb %p len %d priority %u" , chan, skb,
skb->len, skb->priority);
/* Stop if priority has changed */
if (skb->priority < priority)
break ;
skb = skb_dequeue(&chan->data_q);
hci_send_conn_frame(hdev, chan->conn, skb);
hdev->le_last_tx = jiffies;
(*cnt)--;
chan->sent++;
chan->conn->sent++;
/* Send pending SCO packets right away */
hci_sched_sco(hdev, SCO_LINK);
hci_sched_sco(hdev, ESCO_LINK);
}
}
if (*cnt != tmp)
hci_prio_recalculate(hdev, LE_LINK);
}
/* Schedule iso */
static void hci_sched_iso(struct hci_dev *hdev, __u8 type)
{
struct hci_conn *conn;
struct sk_buff *skb;
int quote, *cnt;
BT_DBG("%s" , hdev->name);
if (!hci_conn_num(hdev, type))
return ;
cnt = hdev->iso_pkts ? &hdev->iso_cnt :
hdev->le_pkts ? &hdev->le_cnt : &hdev->acl_cnt;
while (*cnt && (conn = hci_low_sent(hdev, type, "e))) {
while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
BT_DBG("skb %p len %d" , skb, skb->len);
hci_send_conn_frame(hdev, conn, 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, SCO_LINK);
hci_sched_sco(hdev, ESCO_LINK);
hci_sched_iso(hdev, CIS_LINK);
hci_sched_iso(hdev, BIS_LINK);
hci_sched_iso(hdev, PA_LINK);
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;
struct hci_conn *conn;
__u16 handle, flags;
hdr = skb_pull_data(skb, sizeof (*hdr));
if (!hdr) {
bt_dev_err(hdev, "ACL 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);
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);
}
drop:
kfree_skb(skb);
}
/* SCO data packet */
static void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_sco_hdr *hdr;
struct hci_conn *conn;
__u16 handle, flags;
hdr = skb_pull_data(skb, sizeof (*hdr));
if (!hdr) {
bt_dev_err(hdev, "SCO 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);
hdev->stat.sco_rx++;
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, handle);
hci_dev_unlock(hdev);
if (conn) {
/* Send to upper protocol */
hci_skb_pkt_status(skb) = flags & 0 x03;
sco_recv_scodata(conn, skb);
return ;
} else {
bt_dev_err_ratelimited(hdev, "SCO packet for unknown connection handle %d" ,
handle);
}
drop:
kfree_skb(skb);
}
static void hci_isodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_iso_hdr *hdr;
struct hci_conn *conn;
__u16 handle, flags;
hdr = skb_pull_data(skb, sizeof (*hdr));
if (!hdr) {
bt_dev_err(hdev, "ISO packet too small" );
goto drop;
}
handle = __le16_to_cpu(hdr->handle);
flags = hci_flags(handle);
handle = hci_handle(handle);
bt_dev_dbg(hdev, "len %d handle 0x%4.4x flags 0x%4.4x" , skb->len,
handle, flags);
hci_dev_lock(hdev);
conn = hci_conn_hash_lookup_handle(hdev, handle);
hci_dev_unlock(hdev);
if (!conn) {
bt_dev_err(hdev, "ISO packet for unknown connection handle %d" ,
handle);
goto drop;
}
/* Send to upper protocol */
iso_recv(conn, skb, flags);
return ;
drop:
kfree_skb(skb);
}
static bool hci_req_is_complete(struct hci_dev *hdev)
{
struct sk_buff *skb;
skb = skb_peek(&hdev->cmd_q);
if (!skb)
return true ;
return (bt_cb(skb)->hci.req_flags & HCI_REQ_START);
}
static void hci_resend_last(struct hci_dev *hdev)
{
struct hci_command_hdr *sent;
struct sk_buff *skb;
u16 opcode;
if (!hdev->sent_cmd)
return ;
sent = (void *) hdev->sent_cmd->data;
opcode = __le16_to_cpu(sent->opcode);
if (opcode == HCI_OP_RESET)
return ;
skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
if (!skb)
return ;
skb_queue_head(&hdev->cmd_q, skb);
queue_work(hdev->workqueue, &hdev->cmd_work);
}
void hci_req_cmd_complete(struct hci_dev *hdev, u16 opcode, u8 status,
hci_req_complete_t *req_complete,
hci_req_complete_skb_t *req_complete_skb)
{
struct sk_buff *skb;
unsigned long flags;
BT_DBG("opcode 0x%04x status 0x%02x" , opcode, status);
/* If the completed command doesn't match the last one that was
* sent we need to do special handling of it .
*/
if (!hci_sent_cmd_data(hdev, opcode)) {
/* Some CSR based controllers generate a spontaneous
* reset complete event during init and any pending
* command will never be completed . In such a case we
* need to resend whatever was the last sent
* command .
*/
if (test_bit(HCI_INIT, &hdev->flags) && opcode == HCI_OP_RESET)
hci_resend_last(hdev);
return ;
}
/* If we reach this point this event matches the last command sent */
hci_dev_clear_flag(hdev, HCI_CMD_PENDING);
/* If the command succeeded and there's still more commands in
* this request the request is not yet complete .
*/
if (!status && !hci_req_is_complete(hdev))
return ;
skb = hdev->req_skb;
/* If this was the last command in a request the complete
* callback would be found in hdev - > req_skb instead of the
* command queue ( hdev - > cmd_q ) .
*/
if (skb && bt_cb(skb)->hci.req_flags & HCI_REQ_SKB) {
*req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
return ;
}
if (skb && bt_cb(skb)->hci.req_complete) {
*req_complete = bt_cb(skb)->hci.req_complete;
return ;
}
/* Remove all pending commands belonging to this request */
spin_lock_irqsave(&hdev->cmd_q.lock, flags);
while ((skb = __skb_dequeue(&hdev->cmd_q))) {
if (bt_cb(skb)->hci.req_flags & HCI_REQ_START) {
__skb_queue_head(&hdev->cmd_q, skb);
break ;
}
if (bt_cb(skb)->hci.req_flags & HCI_REQ_SKB)
*req_complete_skb = bt_cb(skb)->hci.req_complete_skb;
else
*req_complete = bt_cb(skb)->hci.req_complete;
dev_kfree_skb_irq(skb);
}
spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);
}
static void hci_rx_work(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
struct sk_buff *skb;
BT_DBG("%s" , hdev->name);
/* The kcov_remote functions used for collecting packet parsing
* coverage information from this background thread and associate
* the coverage with the syscall ' s thread which originally injected
* the packet . This helps fuzzing the kernel .
*/
for (; (skb = skb_dequeue(&hdev->rx_q)); kcov_remote_stop()) {
kcov_remote_start_common(skb_get_kcov_handle(skb));
/* Send copy to monitor */
hci_send_to_monitor(hdev, skb);
if (atomic_read(&hdev->promisc)) {
/* Send copy to the sockets */
hci_send_to_sock(hdev, skb);
}
/* If the device has been opened in HCI_USER_CHANNEL,
* the userspace has exclusive access to device .
* When device is HCI_INIT , we still need to process
* the data packets to the driver in order
* to complete its setup ( ) .
*/
if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
!test_bit(HCI_INIT, &hdev->flags)) {
kfree_skb(skb);
continue ;
}
if (test_bit(HCI_INIT, &hdev->flags)) {
/* Don't process data packets in this states. */
switch (hci_skb_pkt_type(skb)) {
case HCI_ACLDATA_PKT:
case HCI_SCODATA_PKT:
case HCI_ISODATA_PKT:
kfree_skb(skb);
continue ;
}
}
/* Process frame */
switch (hci_skb_pkt_type(skb)) {
case HCI_EVENT_PKT:
BT_DBG("%s Event packet" , hdev->name);
hci_event_packet(hdev, skb);
break ;
case HCI_ACLDATA_PKT:
BT_DBG("%s ACL data packet" , hdev->name);
hci_acldata_packet(hdev, skb);
break ;
case HCI_SCODATA_PKT:
BT_DBG("%s SCO data packet" , hdev->name);
hci_scodata_packet(hdev, skb);
break ;
case HCI_ISODATA_PKT:
BT_DBG("%s ISO data packet" , hdev->name);
hci_isodata_packet(hdev, skb);
break ;
default :
kfree_skb(skb);
break ;
}
}
}
static void hci_send_cmd_sync(struct hci_dev *hdev, struct sk_buff *skb)
{
int err;
bt_dev_dbg(hdev, "skb %p" , skb);
kfree_skb(hdev->sent_cmd);
hdev->sent_cmd = skb_clone(skb, GFP_KERNEL);
if (!hdev->sent_cmd) {
skb_queue_head(&hdev->cmd_q, skb);
queue_work(hdev->workqueue, &hdev->cmd_work);
return ;
}
if (hci_skb_opcode(skb) != HCI_OP_NOP) {
err = hci_send_frame(hdev, skb);
if (err < 0 ) {
hci_cmd_sync_cancel_sync(hdev, -err);
return ;
}
atomic_dec(&hdev->cmd_cnt);
}
if (hdev->req_status == HCI_REQ_PEND &&
!hci_dev_test_and_set_flag(hdev, HCI_CMD_PENDING)) {
kfree_skb(hdev->req_skb);
hdev->req_skb = skb_clone(hdev->sent_cmd, GFP_KERNEL);
}
}
static void hci_cmd_work(struct work_struct *work)
{
struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
struct sk_buff *skb;
BT_DBG("%s cmd_cnt %d cmd queued %d" , hdev->name,
atomic_read(&hdev->cmd_cnt), skb_queue_len(&hdev->cmd_q));
/* Send queued commands */
if (atomic_read(&hdev->cmd_cnt)) {
skb = skb_dequeue(&hdev->cmd_q);
if (!skb)
return ;
hci_send_cmd_sync(hdev, skb);
rcu_read_lock();
if (test_bit(HCI_RESET, &hdev->flags) ||
hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
cancel_delayed_work(&hdev->cmd_timer);
else
queue_delayed_work(hdev->workqueue, &hdev->cmd_timer,
HCI_CMD_TIMEOUT);
rcu_read_unlock();
}
}
Messung V0.5 in Prozent C=96 H=94 G=94
¤ Dauer der Verarbeitung: 0.61 Sekunden
(vorverarbeitet am 2026-09-29)
¤
*© Formatika GbR, Deutschland