return ERR_PTR(err);
}
- if (!skb)
- return ERR_PTR(-ENODATA);
-
return skb;
}
EXPORT_SYMBOL(__hci_cmd_sync_sk);
u8 status;
skb = __hci_cmd_sync_sk(hdev, opcode, plen, param, event, timeout, sk);
- if (IS_ERR_OR_NULL(skb)) {
+ if (IS_ERR(skb)) {
bt_dev_err(hdev, "Opcode 0x%4x failed: %ld", opcode,
PTR_ERR(skb));
return PTR_ERR(skb);
}
+ /* If command return a status event skb will be set to NULL as there are
+ * no parameters, in case of failure IS_ERR(skb) would have be set to
+ * the actual error would be found with PTR_ERR(skb).
+ */
+ if (!skb)
+ return 0;
+
status = skb->data[0];
kfree_skb(skb);
sizeof(enable), &enable, HCI_CMD_TIMEOUT);
}
-static int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
- struct sock *sk)
+static int enable_advertising_sync(struct hci_dev *hdev, void *data)
+{
+ return hci_enable_advertising_sync(hdev);
+}
+
+int hci_enable_advertising(struct hci_dev *hdev)
+{
+ if (!hci_dev_test_flag(hdev, HCI_ADVERTISING) &&
+ list_empty(&hdev->adv_instances))
+ return 0;
+
+ return hci_cmd_sync_queue(hdev, enable_advertising_sync, NULL, NULL);
+}
+
+int hci_remove_ext_adv_instance_sync(struct hci_dev *hdev, u8 instance,
+ struct sock *sk)
{
int err;
return 0;
}
-/* This function disables all user advertising instances (excluding 0x00) */
+/* This function enables all user advertising instances (excluding 0x00) */
static int hci_resume_advertising_sync(struct hci_dev *hdev)
{
struct adv_info *adv, *tmp;
}
static int hci_start_scan_sync(struct hci_dev *hdev, u8 type, u16 interval,
- u16 window, u8 own_addr_type, u8 filter_policy)
+ u16 window, u8 own_addr_type, u8 filter_policy,
+ u8 filter_dup)
{
int err;
if (err)
return err;
- return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE,
- LE_SCAN_FILTER_DUP_ENABLE);
+ return hci_le_set_scan_enable_sync(hdev, LE_SCAN_ENABLE, filter_dup);
}
int hci_passive_scan_sync(struct hci_dev *hdev)
bt_dev_dbg(hdev, "LE passive scan with acceptlist = %d", filter_policy);
return hci_start_scan_sync(hdev, LE_SCAN_PASSIVE, interval, window,
- own_addr_type, filter_policy);
+ own_addr_type, filter_policy,
+ LE_SCAN_FILTER_DUP_ENABLE);
}
/* This function controls the passive scanning based on hdev->pend_le_conns
sizeof(cp), &cp, HCI_CMD_TIMEOUT);
}
-static int hci_stop_discovery_sync(struct hci_dev *hdev)
+int hci_stop_discovery_sync(struct hci_dev *hdev)
{
struct discovery_state *d = &hdev->discovery;
struct inquiry_entry *e;
return err;
}
+ /* Resume advertising if it was paused */
+ if (use_ll_privacy(hdev))
+ hci_resume_advertising_sync(hdev);
+
/* No further actions needed for LE-only discovery */
if (d->type == DISCOV_TYPE_LE)
return 0;
return hci_power_off_sync(hdev);
}
+
+static int hci_inquiry_sync(struct hci_dev *hdev, u8 length)
+{
+ const u8 giac[3] = { 0x33, 0x8b, 0x9e };
+ const u8 liac[3] = { 0x00, 0x8b, 0x9e };
+ struct hci_cp_inquiry cp;
+
+ bt_dev_dbg(hdev, "");
+
+ if (hci_dev_test_flag(hdev, HCI_INQUIRY))
+ return 0;
+
+ hci_dev_lock(hdev);
+ hci_inquiry_cache_flush(hdev);
+ hci_dev_unlock(hdev);
+
+ memset(&cp, 0, sizeof(cp));
+
+ if (hdev->discovery.limited)
+ memcpy(&cp.lap, liac, sizeof(cp.lap));
+ else
+ memcpy(&cp.lap, giac, sizeof(cp.lap));
+
+ cp.length = length;
+
+ return __hci_cmd_sync_status(hdev, HCI_OP_INQUIRY,
+ sizeof(cp), &cp, HCI_CMD_TIMEOUT);
+}
+
+static int hci_active_scan_sync(struct hci_dev *hdev, uint16_t interval)
+{
+ u8 own_addr_type;
+ /* Accept list is not used for discovery */
+ u8 filter_policy = 0x00;
+ /* Default is to enable duplicates filter */
+ u8 filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
+ int err;
+
+ bt_dev_dbg(hdev, "");
+
+ /* If controller is scanning, it means the passive scanning is
+ * running. Thus, we should temporarily stop it in order to set the
+ * discovery scanning parameters.
+ */
+ err = hci_scan_disable_sync(hdev);
+ if (err) {
+ bt_dev_err(hdev, "Unable to disable scanning: %d", err);
+ return err;
+ }
+
+ cancel_interleave_scan(hdev);
+
+ /* Pause advertising since active scanning disables address resolution
+ * which advertising depend on in order to generate its RPAs.
+ */
+ if (use_ll_privacy(hdev)) {
+ err = hci_pause_advertising_sync(hdev);
+ if (err) {
+ bt_dev_err(hdev, "pause advertising failed: %d", err);
+ goto failed;
+ }
+ }
+
+ /* Disable address resolution while doing active scanning since the
+ * accept list shall not be used and all reports shall reach the host
+ * anyway.
+ */
+ err = hci_le_set_addr_resolution_enable_sync(hdev, 0x00);
+ if (err) {
+ bt_dev_err(hdev, "Unable to disable Address Resolution: %d",
+ err);
+ goto failed;
+ }
+
+ /* All active scans will be done with either a resolvable private
+ * address (when privacy feature has been enabled) or non-resolvable
+ * private address.
+ */
+ err = hci_update_random_address_sync(hdev, true, scan_use_rpa(hdev),
+ &own_addr_type);
+ if (err < 0)
+ own_addr_type = ADDR_LE_DEV_PUBLIC;
+
+ if (hci_is_adv_monitoring(hdev)) {
+ /* Duplicate filter should be disabled when some advertisement
+ * monitor is activated, otherwise AdvMon can only receive one
+ * advertisement for one peer(*) during active scanning, and
+ * might report loss to these peers.
+ *
+ * Note that different controllers have different meanings of
+ * |duplicate|. Some of them consider packets with the same
+ * address as duplicate, and others consider packets with the
+ * same address and the same RSSI as duplicate. Although in the
+ * latter case we don't need to disable duplicate filter, but
+ * it is common to have active scanning for a short period of
+ * time, the power impact should be neglectable.
+ */
+ filter_dup = LE_SCAN_FILTER_DUP_DISABLE;
+ }
+
+ err = hci_start_scan_sync(hdev, LE_SCAN_ACTIVE, interval,
+ hdev->le_scan_window_discovery,
+ own_addr_type, filter_policy, filter_dup);
+ if (!err)
+ return err;
+
+failed:
+ /* Resume advertising if it was paused */
+ if (use_ll_privacy(hdev))
+ hci_resume_advertising_sync(hdev);
+
+ /* Resume passive scanning */
+ hci_update_passive_scan_sync(hdev);
+ return err;
+}
+
+static int hci_start_interleaved_discovery_sync(struct hci_dev *hdev)
+{
+ int err;
+
+ bt_dev_dbg(hdev, "");
+
+ err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery * 2);
+ if (err)
+ return err;
+
+ return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
+}
+
+int hci_start_discovery_sync(struct hci_dev *hdev)
+{
+ unsigned long timeout;
+ int err;
+
+ bt_dev_dbg(hdev, "type %u", hdev->discovery.type);
+
+ switch (hdev->discovery.type) {
+ case DISCOV_TYPE_BREDR:
+ return hci_inquiry_sync(hdev, DISCOV_BREDR_INQUIRY_LEN);
+ case DISCOV_TYPE_INTERLEAVED:
+ /* When running simultaneous discovery, the LE scanning time
+ * should occupy the whole discovery time sine BR/EDR inquiry
+ * and LE scanning are scheduled by the controller.
+ *
+ * For interleaving discovery in comparison, BR/EDR inquiry
+ * and LE scanning are done sequentially with separate
+ * timeouts.
+ */
+ if (test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY,
+ &hdev->quirks)) {
+ timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
+ /* During simultaneous discovery, we double LE scan
+ * interval. We must leave some time for the controller
+ * to do BR/EDR inquiry.
+ */
+ err = hci_start_interleaved_discovery_sync(hdev);
+ break;
+ }
+
+ timeout = msecs_to_jiffies(hdev->discov_interleaved_timeout);
+ err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
+ break;
+ case DISCOV_TYPE_LE:
+ timeout = msecs_to_jiffies(DISCOV_LE_TIMEOUT);
+ err = hci_active_scan_sync(hdev, hdev->le_scan_int_discovery);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (err)
+ return err;
+
+ bt_dev_dbg(hdev, "timeout %u ms", jiffies_to_msecs(timeout));
+
+ /* When service discovery is used and the controller has a
+ * strict duplicate filter, it is important to remember the
+ * start and duration of the scan. This is required for
+ * restarting scanning during the discovery phase.
+ */
+ if (test_bit(HCI_QUIRK_STRICT_DUPLICATE_FILTER, &hdev->quirks) &&
+ hdev->discovery.result_filtering) {
+ hdev->discovery.scan_start = jiffies;
+ hdev->discovery.scan_duration = timeout;
+ }
+
+ queue_delayed_work(hdev->req_workqueue, &hdev->le_scan_disable,
+ timeout);
+
+ return 0;
+}
return true;
}
+static void start_discovery_complete(struct hci_dev *hdev, void *data, int err)
+{
+ struct mgmt_pending_cmd *cmd = data;
+
+ bt_dev_dbg(hdev, "err %d", err);
+
+ mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, mgmt_status(err),
+ cmd->param, 1);
+ mgmt_pending_free(cmd);
+
+ /* Handle suspend notifier */
+ if (test_and_clear_bit(SUSPEND_UNPAUSE_DISCOVERY,
+ hdev->suspend_tasks)) {
+ bt_dev_dbg(hdev, "Unpaused discovery");
+ wake_up(&hdev->suspend_wait_q);
+ }
+
+ hci_discovery_set_state(hdev, err ? DISCOVERY_STOPPED :
+ DISCOVERY_FINDING);
+}
+
+static int start_discovery_sync(struct hci_dev *hdev, void *data)
+{
+ return hci_start_discovery_sync(hdev);
+}
+
static int start_discovery_internal(struct sock *sk, struct hci_dev *hdev,
u16 op, void *data, u16 len)
{
else
hdev->discovery.limited = false;
- cmd = mgmt_pending_add(sk, op, hdev, data, len);
+ cmd = mgmt_pending_new(sk, op, hdev, data, len);
if (!cmd) {
err = -ENOMEM;
goto failed;
}
- cmd->cmd_complete = generic_cmd_complete;
+ err = hci_cmd_sync_queue(hdev, start_discovery_sync, cmd,
+ start_discovery_complete);
+ if (err < 0) {
+ mgmt_pending_free(cmd);
+ goto failed;
+ }
hci_discovery_set_state(hdev, DISCOVERY_STARTING);
- queue_work(hdev->req_workqueue, &hdev->discov_update);
- err = 0;
failed:
hci_dev_unlock(hdev);
data, len);
}
-static int service_discovery_cmd_complete(struct mgmt_pending_cmd *cmd,
- u8 status)
-{
- return mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, status,
- cmd->param, 1);
-}
-
static int start_service_discovery(struct sock *sk, struct hci_dev *hdev,
void *data, u16 len)
{
goto failed;
}
- cmd = mgmt_pending_add(sk, MGMT_OP_START_SERVICE_DISCOVERY,
+ cmd = mgmt_pending_new(sk, MGMT_OP_START_SERVICE_DISCOVERY,
hdev, data, len);
if (!cmd) {
err = -ENOMEM;
goto failed;
}
- cmd->cmd_complete = service_discovery_cmd_complete;
-
/* Clear the discovery filter first to free any previously
* allocated memory for the UUID list.
*/
}
}
+ err = hci_cmd_sync_queue(hdev, start_discovery_sync, cmd,
+ start_discovery_complete);
+ if (err < 0) {
+ mgmt_pending_free(cmd);
+ goto failed;
+ }
+
hci_discovery_set_state(hdev, DISCOVERY_STARTING);
- queue_work(hdev->req_workqueue, &hdev->discov_update);
- err = 0;
failed:
hci_dev_unlock(hdev);
}
}
+static void stop_discovery_complete(struct hci_dev *hdev, void *data, int err)
+{
+ struct mgmt_pending_cmd *cmd = data;
+
+ bt_dev_dbg(hdev, "err %d", err);
+
+ mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode, mgmt_status(err),
+ cmd->param, 1);
+ mgmt_pending_free(cmd);
+
+ /* Handle suspend notifier */
+ if (test_and_clear_bit(SUSPEND_PAUSE_DISCOVERY, hdev->suspend_tasks)) {
+ bt_dev_dbg(hdev, "Paused discovery");
+ wake_up(&hdev->suspend_wait_q);
+ }
+
+ if (!err)
+ hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
+}
+
+static int stop_discovery_sync(struct hci_dev *hdev, void *data)
+{
+ return hci_stop_discovery_sync(hdev);
+}
+
static int stop_discovery(struct sock *sk, struct hci_dev *hdev, void *data,
u16 len)
{
goto unlock;
}
- cmd = mgmt_pending_add(sk, MGMT_OP_STOP_DISCOVERY, hdev, data, len);
+ cmd = mgmt_pending_new(sk, MGMT_OP_STOP_DISCOVERY, hdev, data, len);
if (!cmd) {
err = -ENOMEM;
goto unlock;
}
- cmd->cmd_complete = generic_cmd_complete;
+ err = hci_cmd_sync_queue(hdev, stop_discovery_sync, cmd,
+ stop_discovery_complete);
+ if (err < 0) {
+ mgmt_pending_free(cmd);
+ goto unlock;
+ }
hci_discovery_set_state(hdev, DISCOVERY_STOPPING);
- queue_work(hdev->req_workqueue, &hdev->discov_update);
- err = 0;
unlock:
hci_dev_unlock(hdev);
* loaded.
*/
if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
- hdev->discovery.state == DISCOVERY_STOPPED) {
- struct hci_request req;
-
- hci_req_init(&req, hdev);
-
- hci_req_add_le_scan_disable(&req, false);
- hci_req_add_le_passive_scan(&req);
-
- hci_req_run(&req, NULL);
- }
+ hdev->discovery.state == DISCOVERY_STOPPED)
+ hci_update_passive_scan(hdev);
hci_dev_unlock(hdev);
projects / users / dwmw2 / linux.git / commitdiff