This patch implements the interleaving between allowlist scan and
no-filter scan. It'll be used to save power when at least one monitor is
registered and at least one pending connection or one device to be
scanned for.
The durations of the allowlist scan and the no-filter scan are
controlled by MGMT command: Set Default System Configuration. The
default values are set randomly for now.
Signed-off-by: Howard Chung <[email protected]>
Reviewed-by: Alain Michaud <[email protected]>
Reviewed-by: Manish Mandlik <[email protected]>
---
Changes in v11:
- Add signed-off-by lines in patch 4/5, 5/5
Changes in v10:
- remove comment about setting default values
- rename should_interleaving to use_interleaving
- rebase on new bluetooth-next/master (previous patch was applied)
Changes in v9:
- Fix compile warning on patch 6/6
Changes in v8:
- Simplified logic in __hci_update_interleaved_scan
- Remove hdev->name when calling bt_dev_dbg
- Remove 'default' in hci_req_add_le_interleaved_scan switch block
- Remove {} around :1915
- Update commit message and title in v7 4/5
- Add a cleanup patch for replacing BT_DBG with bt_dev_dbg
Changes in v7:
- Fix bt_dev_warn argument type warning
Changes in v6:
- Set parameter EnableAdvMonInterleaveScan to 1 byte long
Changes in v5:
- Rename 'adv_monitor' from many functions/variables
- Move __hci_update_interleaved_scan into hci_req_add_le_passive_scan
- Update the logic of update_adv_monitor_scan_state
Changes in v4:
- Rebase to bluetooth-next/master (previous 2 patches are applied)
- Fix over 80 chars limit in mgmt_config.c
- Set EnableAdvMonInterleaveScan default to Disable
Changes in v3:
- Remove 'Bluez' prefix
Changes in v2:
- remove 'case 0x001c' in mgmt_config.c
include/net/bluetooth/hci_core.h | 10 +++
net/bluetooth/hci_core.c | 3 +
net/bluetooth/hci_request.c | 128 +++++++++++++++++++++++++++++--
net/bluetooth/mgmt_config.c | 10 +++
4 files changed, 144 insertions(+), 7 deletions(-)
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 9873e1c8cd163..cfede18709d8f 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -361,6 +361,8 @@ struct hci_dev {
__u8 ssp_debug_mode;
__u8 hw_error_code;
__u32 clock;
+ __u16 advmon_allowlist_duration;
+ __u16 advmon_no_filter_duration;
__u16 devid_source;
__u16 devid_vendor;
@@ -542,6 +544,14 @@ struct hci_dev {
struct delayed_work rpa_expired;
bdaddr_t rpa;
+ enum {
+ INTERLEAVE_SCAN_NONE,
+ INTERLEAVE_SCAN_NO_FILTER,
+ INTERLEAVE_SCAN_ALLOWLIST
+ } interleave_scan_state;
+
+ struct delayed_work interleave_scan;
+
#if IS_ENABLED(CONFIG_BT_LEDS)
struct led_trigger *power_led;
#endif
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index c4aa2cbb92697..20506b31492d6 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3592,6 +3592,9 @@ struct hci_dev *hci_alloc_dev(void)
hdev->cur_adv_instance = 0x00;
hdev->adv_instance_timeout = 0;
+ hdev->advmon_allowlist_duration = 300;
+ hdev->advmon_no_filter_duration = 500;
+
hdev->sniff_max_interval = 800;
hdev->sniff_min_interval = 80;
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index fb87882fb71a1..d6bf1517ddaec 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -378,6 +378,53 @@ void __hci_req_write_fast_connectable(struct hci_request *req, bool enable)
hci_req_add(req, HCI_OP_WRITE_PAGE_SCAN_TYPE, 1, &type);
}
+static void start_interleave_scan(struct hci_dev *hdev)
+{
+ hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
+ queue_delayed_work(hdev->req_workqueue,
+ &hdev->interleave_scan, 0);
+}
+
+static bool is_interleave_scanning(struct hci_dev *hdev)
+{
+ return hdev->interleave_scan_state != INTERLEAVE_SCAN_NONE;
+}
+
+static void cancel_interleave_scan(struct hci_dev *hdev)
+{
+ bt_dev_dbg(hdev, "cancelling interleave scan");
+
+ cancel_delayed_work_sync(&hdev->interleave_scan);
+
+ hdev->interleave_scan_state = INTERLEAVE_SCAN_NONE;
+}
+
+/* Return true if interleave_scan wasn't started until exiting this function,
+ * otherwise, return false
+ */
+static bool __hci_update_interleaved_scan(struct hci_dev *hdev)
+{
+ /* If there is at least one ADV monitors and one pending LE connection
+ * or one device to be scanned for, we should alternate between
+ * allowlist scan and one without any filters to save power.
+ */
+ bool use_interleaving = hci_is_adv_monitoring(hdev) &&
+ !(list_empty(&hdev->pend_le_conns) &&
+ list_empty(&hdev->pend_le_reports));
+ bool is_interleaving = is_interleave_scanning(hdev);
+
+ if (use_interleaving && !is_interleaving) {
+ start_interleave_scan(hdev);
+ bt_dev_dbg(hdev, "starting interleave scan");
+ return true;
+ }
+
+ if (!use_interleaving && is_interleaving)
+ cancel_interleave_scan(hdev);
+
+ return false;
+}
+
/* This function controls the background scanning based on hdev->pend_le_conns
* list. If there are pending LE connection we start the background scanning,
* otherwise we stop it.
@@ -450,8 +497,7 @@ static void __hci_update_background_scan(struct hci_request *req)
hci_req_add_le_scan_disable(req, false);
hci_req_add_le_passive_scan(req);
-
- BT_DBG("%s starting background scanning", hdev->name);
+ bt_dev_dbg(hdev, "starting background scanning");
}
}
@@ -848,12 +894,17 @@ static u8 update_white_list(struct hci_request *req)
return 0x00;
}
- /* Once the controller offloading of advertisement monitor is in place,
- * the if condition should include the support of MSFT extension
- * support. If suspend is ongoing, whitelist should be the default to
- * prevent waking by random advertisements.
+ /* Use the allowlist unless the following conditions are all true:
+ * - We are not currently suspending
+ * - There are 1 or more ADV monitors registered
+ * - Interleaved scanning is not currently using the allowlist
+ *
+ * Once the controller offloading of advertisement monitor is in place,
+ * the above condition should include the support of MSFT extension
+ * support.
*/
- if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended)
+ if (!idr_is_empty(&hdev->adv_monitors_idr) && !hdev->suspended &&
+ hdev->interleave_scan_state != INTERLEAVE_SCAN_ALLOWLIST)
return 0x00;
/* Select filter policy to use white list */
@@ -1006,6 +1057,10 @@ void hci_req_add_le_passive_scan(struct hci_request *req)
&own_addr_type))
return;
+ if (__hci_update_interleaved_scan(hdev))
+ return;
+
+ bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
/* Adding or removing entries from the white list must
* happen before enabling scanning. The controller does
* not allow white list modification while scanning.
@@ -1870,6 +1925,62 @@ static void adv_timeout_expire(struct work_struct *work)
hci_dev_unlock(hdev);
}
+static int hci_req_add_le_interleaved_scan(struct hci_request *req,
+ unsigned long opt)
+{
+ struct hci_dev *hdev = req->hdev;
+ int ret = 0;
+
+ hci_dev_lock(hdev);
+
+ if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
+ hci_req_add_le_scan_disable(req, false);
+ hci_req_add_le_passive_scan(req);
+
+ switch (hdev->interleave_scan_state) {
+ case INTERLEAVE_SCAN_ALLOWLIST:
+ bt_dev_dbg(hdev, "next state: allowlist");
+ hdev->interleave_scan_state = INTERLEAVE_SCAN_NO_FILTER;
+ break;
+ case INTERLEAVE_SCAN_NO_FILTER:
+ bt_dev_dbg(hdev, "next state: no filter");
+ hdev->interleave_scan_state = INTERLEAVE_SCAN_ALLOWLIST;
+ break;
+ case INTERLEAVE_SCAN_NONE:
+ BT_ERR("unexpected error");
+ ret = -1;
+ }
+
+ hci_dev_unlock(hdev);
+
+ return ret;
+}
+
+static void interleave_scan_work(struct work_struct *work)
+{
+ struct hci_dev *hdev = container_of(work, struct hci_dev,
+ interleave_scan.work);
+ u8 status;
+ unsigned long timeout;
+
+ if (hdev->interleave_scan_state == INTERLEAVE_SCAN_ALLOWLIST) {
+ timeout = msecs_to_jiffies(hdev->advmon_allowlist_duration);
+ } else if (hdev->interleave_scan_state == INTERLEAVE_SCAN_NO_FILTER) {
+ timeout = msecs_to_jiffies(hdev->advmon_no_filter_duration);
+ } else {
+ bt_dev_err(hdev, "unexpected error");
+ return;
+ }
+
+ hci_req_sync(hdev, hci_req_add_le_interleaved_scan, 0,
+ HCI_CMD_TIMEOUT, &status);
+
+ /* Don't continue interleaving if it was canceled */
+ if (is_interleave_scanning(hdev))
+ queue_delayed_work(hdev->req_workqueue,
+ &hdev->interleave_scan, timeout);
+}
+
int hci_get_random_address(struct hci_dev *hdev, bool require_privacy,
bool use_rpa, struct adv_info *adv_instance,
u8 *own_addr_type, bdaddr_t *rand_addr)
@@ -3297,6 +3408,7 @@ void hci_request_setup(struct hci_dev *hdev)
INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
INIT_DELAYED_WORK(&hdev->le_scan_restart, le_scan_restart_work);
INIT_DELAYED_WORK(&hdev->adv_instance_expire, adv_timeout_expire);
+ INIT_DELAYED_WORK(&hdev->interleave_scan, interleave_scan_work);
}
void hci_request_cancel_all(struct hci_dev *hdev)
@@ -3316,4 +3428,6 @@ void hci_request_cancel_all(struct hci_dev *hdev)
cancel_delayed_work_sync(&hdev->adv_instance_expire);
hdev->adv_instance_timeout = 0;
}
+
+ cancel_interleave_scan(hdev);
}
diff --git a/net/bluetooth/mgmt_config.c b/net/bluetooth/mgmt_config.c
index b30b571f8caf8..2d3ad288c78ac 100644
--- a/net/bluetooth/mgmt_config.c
+++ b/net/bluetooth/mgmt_config.c
@@ -67,6 +67,8 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
HDEV_PARAM_U16(0x001a, le_supv_timeout),
HDEV_PARAM_U16_JIFFIES_TO_MSECS(0x001b,
def_le_autoconnect_timeout),
+ HDEV_PARAM_U16(0x001d, advmon_allowlist_duration),
+ HDEV_PARAM_U16(0x001e, advmon_no_filter_duration),
};
struct mgmt_rp_read_def_system_config *rp = (void *)params;
@@ -138,6 +140,8 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
case 0x0019:
case 0x001a:
case 0x001b:
+ case 0x001d:
+ case 0x001e:
if (len != sizeof(u16)) {
bt_dev_warn(hdev, "invalid length %d, exp %zu for type %d",
len, sizeof(u16), type);
@@ -251,6 +255,12 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
hdev->def_le_autoconnect_timeout =
msecs_to_jiffies(TLV_GET_LE16(buffer));
break;
+ case 0x0001d:
+ hdev->advmon_allowlist_duration = TLV_GET_LE16(buffer);
+ break;
+ case 0x0001e:
+ hdev->advmon_no_filter_duration = TLV_GET_LE16(buffer);
+ break;
default:
bt_dev_warn(hdev, "unsupported parameter %u", type);
break;
--
2.29.2.454.gaff20da3a2-goog
This patch adds code to handle the active scan during interleave
scan. The interleave scan will be canceled when users start active scan,
and it will be restarted after active scan stopped.
Signed-off-by: Howard Chung <[email protected]>
Reviewed-by: Alain Michaud <[email protected]>
Reviewed-by: Manish Mandlik <[email protected]>
---
(no changes since v1)
net/bluetooth/hci_request.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index 8addb94560013..0c326e32e240c 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -3083,8 +3083,10 @@ static int active_scan(struct hci_request *req, unsigned long opt)
* running. Thus, we should temporarily stop it in order to set the
* discovery scanning parameters.
*/
- if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
+ if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
hci_req_add_le_scan_disable(req, false);
+ cancel_interleave_scan(hdev);
+ }
/* All active scans will be done with either a resolvable private
* address (when privacy feature has been enabled) or non-resolvable
--
2.29.2.454.gaff20da3a2-goog
This is automated email and please do not reply to this email!
Dear submitter,
Thank you for submitting the patches to the linux bluetooth mailing list.
This is a CI test results with your patch series:
PW Link:https://patchwork.kernel.org/project/bluetooth/list/?series=391285
---Test result---
##############################
Test: CheckPatch - FAIL
Output:
Bluetooth: Refactor read default sys config for various types
CHECK: Macro argument '_param_name_' may be better as '(_param_name_)' to avoid precedence issues
#35: FILE: net/bluetooth/mgmt_config.c:20:
+#define TLV_SET_U16(_param_code_, _param_name_) \
+ { \
+ { cpu_to_le16(_param_code_), sizeof(__u16) }, \
+ cpu_to_le16(hdev->_param_name_) \
+ }
CHECK: Macro argument '_param_name_' may be better as '(_param_name_)' to avoid precedence issues
#41: FILE: net/bluetooth/mgmt_config.c:26:
+#define TLV_SET_U16_JIFFIES_TO_MSECS(_param_code_, _param_name_) \
+ { \
+ { cpu_to_le16(_param_code_), sizeof(__u16) }, \
+ cpu_to_le16(jiffies_to_msecs(hdev->_param_name_)) \
+ }
total: 0 errors, 0 warnings, 2 checks, 156 lines checked
NOTE: For some of the reported defects, checkpatch may be able to
mechanically convert to the typical style using --fix or --fix-inplace.
"[PATCH] Bluetooth: Refactor read default sys config for various types" has style problems, please review.
NOTE: If any of the errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.
Bluetooth: Add toggle to switch off interleave scan
CHECK: Macro argument '_param_name_' may be better as '(_param_name_)' to avoid precedence issues
#70: FILE: net/bluetooth/mgmt_config.c:32:
+#define TLV_SET_U8(_param_code_, _param_name_) \
+ { \
+ { cpu_to_le16(_param_code_), sizeof(__u8) }, \
+ hdev->_param_name_ \
+ }
total: 0 errors, 0 warnings, 1 checks, 118 lines checked
NOTE: For some of the reported defects, checkpatch may be able to
mechanically convert to the typical style using --fix or --fix-inplace.
"[PATCH] Bluetooth: Add toggle to switch off interleave scan" has style problems, please review.
NOTE: If any of the errors are false positives, please report
them to the maintainer, see CHECKPATCH in MAINTAINERS.
##############################
Test: CheckGitLint - PASS
##############################
Test: CheckBuildK - PASS
---
Regards,
Linux Bluetooth
Hi Howard,
> This patch adds code to handle the active scan during interleave
> scan. The interleave scan will be canceled when users start active scan,
> and it will be restarted after active scan stopped.
>
> Signed-off-by: Howard Chung <[email protected]>
> Reviewed-by: Alain Michaud <[email protected]>
> Reviewed-by: Manish Mandlik <[email protected]>
> ---
>
> (no changes since v1)
>
> net/bluetooth/hci_request.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
patch has been applied to bluetooth-next tree.
Regards
Marcel