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Bluetooth: disable advertisement filters during suspend

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This adds logic to disable and reenable advertisement filters during
suspend and resume. After this patch, we would only receive packets from
devices in allow list during suspend.

Signed-off-by: Howard Chung <howardchung@google.com>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Howard Chung 2021-01-22 16:36:17 +08:00 • committed by Marcel Holtmann
parent 58ceb1e6d6
commit bf6a4e30ff
4 changed files with 46 additions and 5 deletions
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29
net/bluetooth/hci_request.c
View file

@ -29,6 +29,7 @@
#include "smp.h"
#include "hci_request.h"
#include "msft.h"
#define HCI_REQ_DONE 0
#define HCI_REQ_PEND 1
@ -1242,6 +1243,29 @@ static void suspend_req_complete(struct hci_dev *hdev, u8 status, u16 opcode)
clear_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
wake_up(&hdev->suspend_wait_q);
}
if (test_bit(SUSPEND_SET_ADV_FILTER, hdev->suspend_tasks)) {
clear_bit(SUSPEND_SET_ADV_FILTER, hdev->suspend_tasks);
wake_up(&hdev->suspend_wait_q);
}
}
static void hci_req_add_set_adv_filter_enable(struct hci_request *req,
bool enable)
{
struct hci_dev *hdev = req->hdev;
switch (hci_get_adv_monitor_offload_ext(hdev)) {
case HCI_ADV_MONITOR_EXT_MSFT:
msft_req_add_set_filter_enable(req, enable);
break;
default:
return;
}
/* No need to block when enabling since it's on resume path */
if (hdev->suspended && !enable)
set_bit(SUSPEND_SET_ADV_FILTER, hdev->suspend_tasks);
}
/* Call with hci_dev_lock */
@ -1301,6 +1325,9 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
hci_req_add_le_scan_disable(&req, false);
}
/* Disable advertisement filters */
hci_req_add_set_adv_filter_enable(&req, false);
/* Mark task needing completion */
set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
@ -1340,6 +1367,8 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
hci_req_clear_event_filter(&req);
/* Reset passive/background scanning to normal */
__hci_update_background_scan(&req);
/* Enable all of the advertisement filters */
hci_req_add_set_adv_filter_enable(&req, true);
/* Unpause directed advertising */
hdev->advertising_paused = false;