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Commit 5a154e6f authored by Johan Hedberg's avatar Johan Hedberg Committed by Marcel Holtmann
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Bluetooth: Fix Add Device to wait for HCI before sending cmd_complete 



This patch updates the Add Device mgmt command handler to use a
hci_request to wait for HCI command completion before notifying user
space of the mgmt command completion. To do this we need to add an extra
hci_request parameter to the hci_conn_params_set function. Since this
function has no other users besides mgmt.c it's moved there as a static
function.

Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 51ef3ebe

include/net/bluetooth/hci_core.h

+0 −2
Original line number Diff line number Diff line
@@ -920,8 +920,6 @@ struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev, 
					       bdaddr_t *addr, u8 addr_type);

struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,

					    bdaddr_t *addr, u8 addr_type);

int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,

			u8 auto_connect);

void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);

void hci_conn_params_clear_all(struct hci_dev *hdev);

void hci_conn_params_clear_disabled(struct hci_dev *hdev);

net/bluetooth/hci_core.c

+0 −58
Original line number Diff line number Diff line
@@ -3660,23 +3660,6 @@ struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev, 
	return NULL;

}



static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)

{

	struct hci_conn *conn;



	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr);

	if (!conn)

		return false;



	if (conn->dst_type != type)

		return false;



	if (conn->state != BT_CONNECTED)

		return false;



	return true;

}



/* This function requires the caller holds hdev->lock */

struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,

						  bdaddr_t *addr, u8 addr_type)
@@ -3732,47 +3715,6 @@ struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev, 
	return params;

}



/* This function requires the caller holds hdev->lock */

int hci_conn_params_set(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type,

			u8 auto_connect)

{

	struct hci_conn_params *params;



	params = hci_conn_params_add(hdev, addr, addr_type);

	if (!params)

		return -EIO;



	if (params->auto_connect == auto_connect)

		return 0;



	list_del_init(&params->action);



	switch (auto_connect) {

	case HCI_AUTO_CONN_DISABLED:

	case HCI_AUTO_CONN_LINK_LOSS:

		hci_update_background_scan(hdev);

		break;

	case HCI_AUTO_CONN_REPORT:

		list_add(&params->action, &hdev->pend_le_reports);

		hci_update_background_scan(hdev);

		break;

	case HCI_AUTO_CONN_DIRECT:

	case HCI_AUTO_CONN_ALWAYS:

		if (!is_connected(hdev, addr, addr_type)) {

			list_add(&params->action, &hdev->pend_le_conns);

			hci_update_background_scan(hdev);

		}

		break;

	}



	params->auto_connect = auto_connect;



	BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,

	       auto_connect);



	return 0;

}



static void hci_conn_params_free(struct hci_conn_params *params)

{

	if (params->conn) {

net/bluetooth/mgmt.c

+109 −10
Original line number Diff line number Diff line
@@ -5425,6 +5425,65 @@ static int get_clock_info(struct sock *sk, struct hci_dev *hdev, void *data, 
	return err;

}



static bool is_connected(struct hci_dev *hdev, bdaddr_t *addr, u8 type)

{

	struct hci_conn *conn;



	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, addr);

	if (!conn)

		return false;



	if (conn->dst_type != type)

		return false;



	if (conn->state != BT_CONNECTED)

		return false;



	return true;

}



/* This function requires the caller holds hdev->lock */

static int hci_conn_params_set(struct hci_request *req, bdaddr_t *addr,

			       u8 addr_type, u8 auto_connect)

{

	struct hci_dev *hdev = req->hdev;

	struct hci_conn_params *params;



	params = hci_conn_params_add(hdev, addr, addr_type);

	if (!params)

		return -EIO;



	if (params->auto_connect == auto_connect)

		return 0;



	list_del_init(&params->action);



	switch (auto_connect) {

	case HCI_AUTO_CONN_DISABLED:

	case HCI_AUTO_CONN_LINK_LOSS:

		__hci_update_background_scan(req);

		break;

	case HCI_AUTO_CONN_REPORT:

		list_add(&params->action, &hdev->pend_le_reports);

		__hci_update_background_scan(req);

		break;

	case HCI_AUTO_CONN_DIRECT:

	case HCI_AUTO_CONN_ALWAYS:

		if (!is_connected(hdev, addr, addr_type)) {

			list_add(&params->action, &hdev->pend_le_conns);

			__hci_update_background_scan(req);

		}

		break;

	}



	params->auto_connect = auto_connect;



	BT_DBG("addr %pMR (type %u) auto_connect %u", addr, addr_type,

	       auto_connect);



	return 0;

}



static void device_added(struct sock *sk, struct hci_dev *hdev,

			 bdaddr_t *bdaddr, u8 type, u8 action)

{
@@ -5437,10 +5496,31 @@ static void device_added(struct sock *sk, struct hci_dev *hdev, 
	mgmt_event(MGMT_EV_DEVICE_ADDED, hdev, &ev, sizeof(ev), sk);

}



static void add_device_complete(struct hci_dev *hdev, u8 status)

{

	struct pending_cmd *cmd;



	BT_DBG("status 0x%02x", status);



	hci_dev_lock(hdev);



	cmd = mgmt_pending_find(MGMT_OP_ADD_DEVICE, hdev);

	if (!cmd)

		goto unlock;



	cmd->cmd_complete(cmd, mgmt_status(status));

	mgmt_pending_remove(cmd);



unlock:

	hci_dev_unlock(hdev);

}



static int add_device(struct sock *sk, struct hci_dev *hdev,

		      void *data, u16 len)

{

	struct mgmt_cp_add_device *cp = data;

	struct pending_cmd *cmd;

	struct hci_request req;

	u8 auto_conn, addr_type;

	int err;
@@ -5457,14 +5537,24 @@ static int add_device(struct sock *sk, struct hci_dev *hdev, 
				    MGMT_STATUS_INVALID_PARAMS,

				    &cp->addr, sizeof(cp->addr));



	hci_req_init(&req, hdev);



	hci_dev_lock(hdev);



	cmd = mgmt_pending_add(sk, MGMT_OP_ADD_DEVICE, hdev, data, len);

	if (!cmd) {

		err = -ENOMEM;

		goto unlock;

	}



	cmd->cmd_complete = addr_cmd_complete;



	if (cp->addr.type == BDADDR_BREDR) {

		/* Only incoming connections action is supported for now */

		if (cp->action != 0x01) {

			err = cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,

					   MGMT_STATUS_INVALID_PARAMS,

					   &cp->addr, sizeof(cp->addr));

			err = 0;

			cmd->cmd_complete(cmd, MGMT_STATUS_INVALID_PARAMS);

			mgmt_pending_remove(cmd);

			goto unlock;

		}
@@ -5473,7 +5563,7 @@ static int add_device(struct sock *sk, struct hci_dev *hdev, 
		if (err)

			goto unlock;



		hci_update_page_scan(hdev);

		__hci_update_page_scan(&req);



		goto added;

	}
@@ -5493,19 +5583,28 @@ static int add_device(struct sock *sk, struct hci_dev *hdev, 
	/* If the connection parameters don't exist for this device,

	 * they will be created and configured with defaults.

	 */

	if (hci_conn_params_set(hdev, &cp->addr.bdaddr, addr_type,

	if (hci_conn_params_set(&req, &cp->addr.bdaddr, addr_type,

				auto_conn) < 0) {

		err = cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,

				   MGMT_STATUS_FAILED,

				   &cp->addr, sizeof(cp->addr));

		err = 0;

		cmd->cmd_complete(cmd, MGMT_STATUS_FAILED);

		mgmt_pending_remove(cmd);

		goto unlock;

	}



added:

	device_added(sk, hdev, &cp->addr.bdaddr, cp->addr.type, cp->action);



	err = cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,

			   MGMT_STATUS_SUCCESS, &cp->addr, sizeof(cp->addr));

	err = hci_req_run(&req, add_device_complete);

	if (err < 0) {

		/* ENODATA means no HCI commands were needed (e.g. if

		 * the adapter is powered off).

		 */

		if (err == -ENODATA) {

			cmd->cmd_complete(cmd, MGMT_STATUS_SUCCESS);

			err = 0;

		}

		mgmt_pending_remove(cmd);

	}



unlock:

	hci_dev_unlock(hdev);