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Bluetooth: hci_sync: Refactor remove Adv Monitor

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Make use of hci_cmd_sync_queue for removing an advertisement monitor.

Signed-off-by: Manish Mandlik <mmandlik@google.com>
Reviewed-by: Miao-chen Chou <mcchou@google.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Manish Mandlik 2022-07-20 16:21:14 -07:00 committed by Luiz Augusto von Dentz
parent b747a83690
commit 7cf5c2978f
5 changed files with 75 additions and 178 deletions
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6
include/net/bluetooth/hci_core.h
View File

@ -1420,10 +1420,9 @@ bool hci_adv_instance_is_scannable(struct hci_dev *hdev, u8 instance);
void hci_adv_monitors_clear(struct hci_dev *hdev);
void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
int hci_remove_adv_monitor_complete(struct hci_dev *hdev, u8 status);
int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
bool hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle, int *err);
bool hci_remove_all_adv_monitor(struct hci_dev *hdev, int *err);
int hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle);
int hci_remove_all_adv_monitor(struct hci_dev *hdev);
bool hci_is_adv_monitoring(struct hci_dev *hdev);
int hci_get_adv_monitor_offload_ext(struct hci_dev *hdev);
@ -1883,7 +1882,6 @@ void mgmt_advertising_removed(struct sock *sk, struct hci_dev *hdev,
u8 instance);
void mgmt_adv_monitor_removed(struct hci_dev *hdev, u16 handle);
int mgmt_phy_configuration_changed(struct hci_dev *hdev, struct sock *skip);
int mgmt_remove_adv_monitor_complete(struct hci_dev *hdev, u8 status);
void mgmt_adv_monitor_device_lost(struct hci_dev *hdev, u16 handle,
bdaddr_t *bdaddr, u8 addr_type);

81
net/bluetooth/hci_core.c
View File

@ -1880,11 +1880,6 @@ void hci_free_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
kfree(monitor);
}
int hci_remove_adv_monitor_complete(struct hci_dev *hdev, u8 status)
{
return mgmt_remove_adv_monitor_complete(hdev, status);
}
/* 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.
@ -1933,92 +1928,72 @@ int hci_add_adv_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
/* Attempts to tell the controller and free the monitor. If somehow the
* controller doesn't have a corresponding handle, remove anyway.
* Returns true if request is forwarded (result is pending), false otherwise.
* This function requires the caller holds hdev->lock.
* This function requires the caller holds hci_req_sync_lock.
*/
static bool hci_remove_adv_monitor(struct hci_dev *hdev,
struct adv_monitor *monitor,
u16 handle, int *err)
static int hci_remove_adv_monitor(struct hci_dev *hdev,
struct adv_monitor *monitor)
{
*err = 0;
int status = 0;
switch (hci_get_adv_monitor_offload_ext(hdev)) {
case HCI_ADV_MONITOR_EXT_NONE: /* also goes here when powered off */
bt_dev_dbg(hdev, "%s remove monitor %d status %d", hdev->name,
monitor->handle, status);
goto free_monitor;
case HCI_ADV_MONITOR_EXT_MSFT:
*err = msft_remove_monitor(hdev, monitor, handle);
status = msft_remove_monitor(hdev, monitor);
bt_dev_dbg(hdev, "%s remove monitor %d msft status %d",
hdev->name, monitor->handle, status);
break;
}
/* In case no matching handle registered, just free the monitor */
if (*err == -ENOENT)
if (status == -ENOENT)
goto free_monitor;
return (*err == 0);
return status;
free_monitor:
if (*err == -ENOENT)
if (status == -ENOENT)
bt_dev_warn(hdev, "Removing monitor with no matching handle %d",
monitor->handle);
hci_free_adv_monitor(hdev, monitor);
*err = 0;
return false;
return status;
}
/* Returns true if request is forwarded (result is pending), false otherwise.
* This function requires the caller holds hdev->lock.
*/
bool hci_remove_single_adv_monitor(struct hci_dev *hdev, u16 handle, int *err)
/* 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);
bool pending;
if (!monitor) {
*err = -EINVAL;
return false;
}
if (!monitor)
return -EINVAL;
pending = hci_remove_adv_monitor(hdev, monitor, handle, err);
if (!*err && !pending)
hci_update_passive_scan(hdev);
bt_dev_dbg(hdev, "%s remove monitor handle %d, status %d, %spending",
hdev->name, handle, *err, pending ? "" : "not ");
return pending;
return hci_remove_adv_monitor(hdev, monitor);
}
/* Returns true if request is forwarded (result is pending), false otherwise.
* This function requires the caller holds hdev->lock.
*/
bool hci_remove_all_adv_monitor(struct hci_dev *hdev, int *err)
/* 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;
bool pending = false;
bool update = false;
int status = 0;
*err = 0;
while (!*err && !pending) {
while (1) {
monitor = idr_get_next(&hdev->adv_monitors_idr, &idr_next_id);
if (!monitor)
break;
pending = hci_remove_adv_monitor(hdev, monitor, 0, err);
status = hci_remove_adv_monitor(hdev, monitor);
if (status)
return status;
if (!*err && !pending)
update = true;
idr_next_id++;
}
if (update)
hci_update_passive_scan(hdev);
bt_dev_dbg(hdev, "%s remove all monitors status %d, %spending",
hdev->name, *err, pending ? "" : "not ");
return pending;
return status;
}
/* This function requires the caller holds hdev->lock */

62
net/bluetooth/mgmt.c
View File

@ -4861,49 +4861,46 @@ done:
MGMT_OP_ADD_ADV_PATTERNS_MONITOR_RSSI);
}
int mgmt_remove_adv_monitor_complete(struct hci_dev *hdev, u8 status)
static void mgmt_remove_adv_monitor_complete(struct hci_dev *hdev,
void *data, int status)
{
struct mgmt_rp_remove_adv_monitor rp;
struct mgmt_cp_remove_adv_monitor *cp;
struct mgmt_pending_cmd *cmd;
int err = 0;
struct mgmt_pending_cmd *cmd = data;
struct mgmt_cp_remove_adv_monitor *cp = cmd->param;
hci_dev_lock(hdev);
cmd = pending_find(MGMT_OP_REMOVE_ADV_MONITOR, hdev);
if (!cmd)
goto done;
cp = cmd->param;
rp.monitor_handle = cp->monitor_handle;
if (!status)
hci_update_passive_scan(hdev);
err = mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode,
mgmt_status(status), &rp, sizeof(rp));
mgmt_cmd_complete(cmd->sk, cmd->index, cmd->opcode,
mgmt_status(status), &rp, sizeof(rp));
mgmt_pending_remove(cmd);
done:
hci_dev_unlock(hdev);
bt_dev_dbg(hdev, "remove monitor %d complete, status %u",
bt_dev_dbg(hdev, "remove monitor %d complete, status %d",
rp.monitor_handle, status);
}
return err;
static int mgmt_remove_adv_monitor_sync(struct hci_dev *hdev, void *data)
{
struct mgmt_pending_cmd *cmd = data;
struct mgmt_cp_remove_adv_monitor *cp = cmd->param;
u16 handle = __le16_to_cpu(cp->monitor_handle);
if (!handle)
return hci_remove_all_adv_monitor(hdev);
return hci_remove_single_adv_monitor(hdev, handle);
}
static int remove_adv_monitor(struct sock *sk, struct hci_dev *hdev,
void *data, u16 len)
{
struct mgmt_cp_remove_adv_monitor *cp = data;
struct mgmt_rp_remove_adv_monitor rp;
struct mgmt_pending_cmd *cmd;
u16 handle = __le16_to_cpu(cp->monitor_handle);
int err, status;
bool pending;
BT_DBG("request for %s", hdev->name);
rp.monitor_handle = cp->monitor_handle;
hci_dev_lock(hdev);
@ -4921,34 +4918,23 @@ static int remove_adv_monitor(struct sock *sk, struct hci_dev *hdev,
goto unlock;
}
if (handle)
pending = hci_remove_single_adv_monitor(hdev, handle, &err);
else
pending = hci_remove_all_adv_monitor(hdev, &err);
err = hci_cmd_sync_queue(hdev, mgmt_remove_adv_monitor_sync, cmd,
mgmt_remove_adv_monitor_complete);
if (err) {
mgmt_pending_remove(cmd);
if (err == -ENOENT)
status = MGMT_STATUS_INVALID_INDEX;
if (err == -ENOMEM)
status = MGMT_STATUS_NO_RESOURCES;
else
status = MGMT_STATUS_FAILED;
mgmt_pending_remove(cmd);
goto unlock;
}
/* monitor can be removed without forwarding request to controller */
if (!pending) {
mgmt_pending_remove(cmd);
hci_dev_unlock(hdev);
return mgmt_cmd_complete(sk, hdev->id,
MGMT_OP_REMOVE_ADV_MONITOR,
MGMT_STATUS_SUCCESS,
&rp, sizeof(rp));
}
hci_dev_unlock(hdev);
return 0;
unlock:

98
net/bluetooth/msft.c
View File

@ -99,15 +99,11 @@ struct msft_data {
__u8 evt_prefix_len;
__u8 *evt_prefix;
struct list_head handle_map;
__u16 pending_remove_handle;
__u8 resuming;
__u8 suspending;
__u8 filter_enabled;
};
static int __msft_remove_monitor(struct hci_dev *hdev,
struct adv_monitor *monitor, u16 handle);
bool msft_monitor_supported(struct hci_dev *hdev)
{
return !!(msft_get_features(hdev) & MSFT_FEATURE_MASK_LE_ADV_MONITOR);
@ -255,20 +251,15 @@ unlock:
return status;
}
static void msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
u8 status, u16 opcode,
struct sk_buff *skb)
static int msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
u16 opcode,
struct adv_monitor *monitor,
struct sk_buff *skb)
{
struct msft_cp_le_cancel_monitor_advertisement *cp;
struct msft_rp_le_cancel_monitor_advertisement *rp;
struct adv_monitor *monitor;
struct msft_monitor_advertisement_handle_data *handle_data;
struct msft_data *msft = hdev->msft_data;
int err;
bool pending;
if (status)
goto done;
int status = 0;
rp = (struct msft_rp_le_cancel_monitor_advertisement *)skb->data;
if (skb->len < sizeof(*rp)) {
@ -276,22 +267,22 @@ static void msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
goto done;
}
status = rp->status;
if (status)
goto done;
hci_dev_lock(hdev);
cp = hci_sent_cmd_data(hdev, hdev->msft_opcode);
handle_data = msft_find_handle_data(hdev, cp->handle, false);
handle_data = msft_find_handle_data(hdev, monitor->handle, true);
if (handle_data) {
monitor = idr_find(&hdev->adv_monitors_idr,
handle_data->mgmt_handle);
if (monitor && monitor->state == ADV_MONITOR_STATE_OFFLOADED)
if (monitor->state == ADV_MONITOR_STATE_OFFLOADED)
monitor->state = ADV_MONITOR_STATE_REGISTERED;
/* Do not free the monitor if it is being removed due to
* suspend. It will be re-monitored on resume.
*/
if (monitor && !msft->suspending) {
if (!msft->suspending) {
hci_free_adv_monitor(hdev, monitor);
/* Clear any monitored devices by this Adv Monitor */
@ -303,35 +294,19 @@ static void msft_le_cancel_monitor_advertisement_cb(struct hci_dev *hdev,
kfree(handle_data);
}
/* If remove all monitors is required, we need to continue the process
* here because the earlier it was paused when waiting for the
* response from controller.
*/
if (msft->pending_remove_handle == 0) {
pending = hci_remove_all_adv_monitor(hdev, &err);
if (pending) {
hci_dev_unlock(hdev);
return;
}
if (err)
status = HCI_ERROR_UNSPECIFIED;
}
hci_dev_unlock(hdev);
done:
if (!msft->suspending)
hci_remove_adv_monitor_complete(hdev, status);
return status;
}
/* This function requires the caller holds hci_req_sync_lock */
static int msft_remove_monitor_sync(struct hci_dev *hdev,
struct adv_monitor *monitor)
{
struct msft_cp_le_cancel_monitor_advertisement cp;
struct msft_monitor_advertisement_handle_data *handle_data;
struct sk_buff *skb;
u8 status;
handle_data = msft_find_handle_data(hdev, monitor->handle, true);
@ -347,13 +322,8 @@ static int msft_remove_monitor_sync(struct hci_dev *hdev,
if (IS_ERR(skb))
return PTR_ERR(skb);
status = skb->data[0];
skb_pull(skb, 1);
msft_le_cancel_monitor_advertisement_cb(hdev, status, hdev->msft_opcode,
skb);
return status;
return msft_le_cancel_monitor_advertisement_cb(hdev, hdev->msft_opcode,
monitor, skb);
}
/* This function requires the caller holds hci_req_sync_lock */
@ -811,38 +781,8 @@ int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor)
return msft_add_monitor_sync(hdev, monitor);
}
/* This function requires the caller holds hdev->lock */
static int __msft_remove_monitor(struct hci_dev *hdev,
struct adv_monitor *monitor, u16 handle)
{
struct msft_cp_le_cancel_monitor_advertisement cp;
struct msft_monitor_advertisement_handle_data *handle_data;
struct hci_request req;
struct msft_data *msft = hdev->msft_data;
int err = 0;
handle_data = msft_find_handle_data(hdev, monitor->handle, true);
/* If no matched handle, just remove without telling controller */
if (!handle_data)
return -ENOENT;
cp.sub_opcode = MSFT_OP_LE_CANCEL_MONITOR_ADVERTISEMENT;
cp.handle = handle_data->msft_handle;
hci_req_init(&req, hdev);
hci_req_add(&req, hdev->msft_opcode, sizeof(cp), &cp);
err = hci_req_run_skb(&req, msft_le_cancel_monitor_advertisement_cb);
if (!err)
msft->pending_remove_handle = handle;
return err;
}
/* This function requires the caller holds hdev->lock */
int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor,
u16 handle)
/* This function requires the caller holds hci_req_sync_lock */
int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor)
{
struct msft_data *msft = hdev->msft_data;
@ -852,7 +792,7 @@ int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor,
if (msft->resuming || msft->suspending)
return -EBUSY;
return __msft_remove_monitor(hdev, monitor, handle);
return msft_remove_monitor_sync(hdev, monitor);
}
void msft_req_add_set_filter_enable(struct hci_request *req, bool enable)

6
net/bluetooth/msft.h
View File

@ -20,8 +20,7 @@ void msft_do_close(struct hci_dev *hdev);
void msft_vendor_evt(struct hci_dev *hdev, void *data, struct sk_buff *skb);
__u64 msft_get_features(struct hci_dev *hdev);
int msft_add_monitor_pattern(struct hci_dev *hdev, struct adv_monitor *monitor);
int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor,
u16 handle);
int msft_remove_monitor(struct hci_dev *hdev, struct adv_monitor *monitor);
void msft_req_add_set_filter_enable(struct hci_request *req, bool enable);
int msft_set_filter_enable(struct hci_dev *hdev, bool enable);
int msft_suspend_sync(struct hci_dev *hdev);
@ -49,8 +48,7 @@ static inline int msft_add_monitor_pattern(struct hci_dev *hdev,
}
static inline int msft_remove_monitor(struct hci_dev *hdev,
struct adv_monitor *monitor,
u16 handle)
struct adv_monitor *monitor)
{
return -EOPNOTSUPP;
}