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Bluetooth: Fix Add Device to wait for HCI before sending cmd_complete

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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: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-12-19 22:26:02 +02:00 committed by Marcel Holtmann
parent 51ef3ebe7b
commit 5a154e6f71
3 changed files with 109 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/bluetooth/hci_core.h
View File

@ -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);

58
net/bluetooth/hci_core.c
View File

@ -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) {

119
net/bluetooth/mgmt.c
View File

@ -5425,6 +5425,65 @@ unlock:
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);