[PATCH v11 1/5] Bluetooth: Interleave with allowlist scan

[PATCH v11 1/5] Bluetooth: Interleave with allowlist scan

[Howard Chung]

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 <howardchung@google.com>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Reviewed-by: Manish Mandlik <mmandlik@chromium.org>
---

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

[PATCH v11 2/5] Bluetooth: Handle system suspend resume case

[Howard Chung]

This patch adds code to handle the system suspension during interleave
scan. The interleave scan will be canceled when the system is going to
sleep, and will be restarted after waking up.

Signed-off-by: Howard Chung <howardchung@google.com>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Reviewed-by: Manish Mandlik <mmandlik@chromium.org>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Miao-chen Chou <mcchou@chromium.org>
---

(no changes since v5)

Changes in v5:
- Remove the change in hci_req_config_le_suspend_scan

 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 d6bf1517ddaec..8addb94560013 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -1294,8 +1294,10 @@ void hci_req_prepare_suspend(struct hci_dev *hdev, enum suspended_state next)
 		hci_req_add(&req, HCI_OP_WRITE_SCAN_ENABLE, 1, &page_scan);
 
 		/* Disable LE passive scan if enabled */
-		if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
+		if (hci_dev_test_flag(hdev, HCI_LE_SCAN)) {
+			cancel_interleave_scan(hdev);
 			hci_req_add_le_scan_disable(&req, false);
+		}
 
 		/* Mark task needing completion */
 		set_bit(SUSPEND_SCAN_DISABLE, hdev->suspend_tasks);
-- 
2.29.2.454.gaff20da3a2-goog

Re: [PATCH v11 2/5] Bluetooth: Handle system suspend resume case

[Marcel Holtmann]

Hi Howard,

> This patch adds code to handle the system suspension during interleave
> scan. The interleave scan will be canceled when the system is going to
> sleep, and will be restarted after waking up.
> 
> Signed-off-by: Howard Chung <howardchung@google.com>
> Reviewed-by: Alain Michaud <alainm@chromium.org>
> Reviewed-by: Manish Mandlik <mmandlik@chromium.org>
> Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
> Reviewed-by: Miao-chen Chou <mcchou@chromium.org>
> ---
> 
> (no changes since v5)
> 
> Changes in v5:
> - Remove the change in hci_req_config_le_suspend_scan
> 
> net/bluetooth/hci_request.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel

[PATCH v11 3/5] Bluetooth: Handle active scan case

[Howard Chung]

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 <howardchung@google.com>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Reviewed-by: Manish Mandlik <mmandlik@chromium.org>
---

(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

Re: [PATCH v11 3/5] Bluetooth: Handle active scan case

[Marcel Holtmann]

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 <howardchung@google.com>
> Reviewed-by: Alain Michaud <alainm@chromium.org>
> Reviewed-by: Manish Mandlik <mmandlik@chromium.org>
> ---
> 
> (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

[PATCH v11 4/5] Bluetooth: Refactor read default sys config for various types

[Howard Chung]

Refactor read default system configuration function so that it's capable
of returning different types than u16

Signed-off-by: Howard Chung <howardchung@google.com>
---

(no changes since v8)

Changes in v8:
- Update the commit title and message

 net/bluetooth/mgmt_config.c | 140 +++++++++++++++++++++---------------
 1 file changed, 84 insertions(+), 56 deletions(-)

diff --git a/net/bluetooth/mgmt_config.c b/net/bluetooth/mgmt_config.c
index 2d3ad288c78ac..282fbf82f3192 100644
--- a/net/bluetooth/mgmt_config.c
+++ b/net/bluetooth/mgmt_config.c
@@ -11,72 +11,100 @@
 #include "mgmt_util.h"
 #include "mgmt_config.h"
 
-#define HDEV_PARAM_U16(_param_code_, _param_name_) \
-{ \
-	{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
-	{ cpu_to_le16(hdev->_param_name_) } \
-}
+#define HDEV_PARAM_U16(_param_name_) \
+	struct {\
+		struct mgmt_tlv entry; \
+		__le16 value; \
+	} __packed _param_name_
 
-#define HDEV_PARAM_U16_JIFFIES_TO_MSECS(_param_code_, _param_name_) \
-{ \
-	{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
-	{ cpu_to_le16(jiffies_to_msecs(hdev->_param_name_)) } \
-}
+#define TLV_SET_U16(_param_code_, _param_name_) \
+	{ \
+		{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
+		cpu_to_le16(hdev->_param_name_) \
+	}
+
+#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_)) \
+	}
 
 int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 			   u16 data_len)
 {
-	struct {
-		struct mgmt_tlv entry;
-		union {
-			/* This is a simplification for now since all values
-			 * are 16 bits.  In the future, this code may need
-			 * refactoring to account for variable length values
-			 * and properly calculate the required buffer size.
-			 */
-			__le16 value;
-		};
-	} __packed params[] = {
+	int ret;
+	struct mgmt_rp_read_def_system_config {
 		/* Please see mgmt-api.txt for documentation of these values */
-		HDEV_PARAM_U16(0x0000, def_page_scan_type),
-		HDEV_PARAM_U16(0x0001, def_page_scan_int),
-		HDEV_PARAM_U16(0x0002, def_page_scan_window),
-		HDEV_PARAM_U16(0x0003, def_inq_scan_type),
-		HDEV_PARAM_U16(0x0004, def_inq_scan_int),
-		HDEV_PARAM_U16(0x0005, def_inq_scan_window),
-		HDEV_PARAM_U16(0x0006, def_br_lsto),
-		HDEV_PARAM_U16(0x0007, def_page_timeout),
-		HDEV_PARAM_U16(0x0008, sniff_min_interval),
-		HDEV_PARAM_U16(0x0009, sniff_max_interval),
-		HDEV_PARAM_U16(0x000a, le_adv_min_interval),
-		HDEV_PARAM_U16(0x000b, le_adv_max_interval),
-		HDEV_PARAM_U16(0x000c, def_multi_adv_rotation_duration),
-		HDEV_PARAM_U16(0x000d, le_scan_interval),
-		HDEV_PARAM_U16(0x000e, le_scan_window),
-		HDEV_PARAM_U16(0x000f, le_scan_int_suspend),
-		HDEV_PARAM_U16(0x0010, le_scan_window_suspend),
-		HDEV_PARAM_U16(0x0011, le_scan_int_discovery),
-		HDEV_PARAM_U16(0x0012, le_scan_window_discovery),
-		HDEV_PARAM_U16(0x0013, le_scan_int_adv_monitor),
-		HDEV_PARAM_U16(0x0014, le_scan_window_adv_monitor),
-		HDEV_PARAM_U16(0x0015, le_scan_int_connect),
-		HDEV_PARAM_U16(0x0016, le_scan_window_connect),
-		HDEV_PARAM_U16(0x0017, le_conn_min_interval),
-		HDEV_PARAM_U16(0x0018, le_conn_max_interval),
-		HDEV_PARAM_U16(0x0019, le_conn_latency),
-		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),
+		HDEV_PARAM_U16(def_page_scan_type);
+		HDEV_PARAM_U16(def_page_scan_int);
+		HDEV_PARAM_U16(def_page_scan_window);
+		HDEV_PARAM_U16(def_inq_scan_type);
+		HDEV_PARAM_U16(def_inq_scan_int);
+		HDEV_PARAM_U16(def_inq_scan_window);
+		HDEV_PARAM_U16(def_br_lsto);
+		HDEV_PARAM_U16(def_page_timeout);
+		HDEV_PARAM_U16(sniff_min_interval);
+		HDEV_PARAM_U16(sniff_max_interval);
+		HDEV_PARAM_U16(le_adv_min_interval);
+		HDEV_PARAM_U16(le_adv_max_interval);
+		HDEV_PARAM_U16(def_multi_adv_rotation_duration);
+		HDEV_PARAM_U16(le_scan_interval);
+		HDEV_PARAM_U16(le_scan_window);
+		HDEV_PARAM_U16(le_scan_int_suspend);
+		HDEV_PARAM_U16(le_scan_window_suspend);
+		HDEV_PARAM_U16(le_scan_int_discovery);
+		HDEV_PARAM_U16(le_scan_window_discovery);
+		HDEV_PARAM_U16(le_scan_int_adv_monitor);
+		HDEV_PARAM_U16(le_scan_window_adv_monitor);
+		HDEV_PARAM_U16(le_scan_int_connect);
+		HDEV_PARAM_U16(le_scan_window_connect);
+		HDEV_PARAM_U16(le_conn_min_interval);
+		HDEV_PARAM_U16(le_conn_max_interval);
+		HDEV_PARAM_U16(le_conn_latency);
+		HDEV_PARAM_U16(le_supv_timeout);
+		HDEV_PARAM_U16(def_le_autoconnect_timeout);
+		HDEV_PARAM_U16(advmon_allowlist_duration);
+		HDEV_PARAM_U16(advmon_no_filter_duration);
+	} __packed rp = {
+		TLV_SET_U16(0x0000, def_page_scan_type),
+		TLV_SET_U16(0x0001, def_page_scan_int),
+		TLV_SET_U16(0x0002, def_page_scan_window),
+		TLV_SET_U16(0x0003, def_inq_scan_type),
+		TLV_SET_U16(0x0004, def_inq_scan_int),
+		TLV_SET_U16(0x0005, def_inq_scan_window),
+		TLV_SET_U16(0x0006, def_br_lsto),
+		TLV_SET_U16(0x0007, def_page_timeout),
+		TLV_SET_U16(0x0008, sniff_min_interval),
+		TLV_SET_U16(0x0009, sniff_max_interval),
+		TLV_SET_U16(0x000a, le_adv_min_interval),
+		TLV_SET_U16(0x000b, le_adv_max_interval),
+		TLV_SET_U16(0x000c, def_multi_adv_rotation_duration),
+		TLV_SET_U16(0x000d, le_scan_interval),
+		TLV_SET_U16(0x000e, le_scan_window),
+		TLV_SET_U16(0x000f, le_scan_int_suspend),
+		TLV_SET_U16(0x0010, le_scan_window_suspend),
+		TLV_SET_U16(0x0011, le_scan_int_discovery),
+		TLV_SET_U16(0x0012, le_scan_window_discovery),
+		TLV_SET_U16(0x0013, le_scan_int_adv_monitor),
+		TLV_SET_U16(0x0014, le_scan_window_adv_monitor),
+		TLV_SET_U16(0x0015, le_scan_int_connect),
+		TLV_SET_U16(0x0016, le_scan_window_connect),
+		TLV_SET_U16(0x0017, le_conn_min_interval),
+		TLV_SET_U16(0x0018, le_conn_max_interval),
+		TLV_SET_U16(0x0019, le_conn_latency),
+		TLV_SET_U16(0x001a, le_supv_timeout),
+		TLV_SET_U16_JIFFIES_TO_MSECS(0x001b,
+					     def_le_autoconnect_timeout),
+		TLV_SET_U16(0x001d, advmon_allowlist_duration),
+		TLV_SET_U16(0x001e, advmon_no_filter_duration),
 	};
-	struct mgmt_rp_read_def_system_config *rp = (void *)params;
 
 	bt_dev_dbg(hdev, "sock %p", sk);
 
-	return mgmt_cmd_complete(sk, hdev->id,
-				 MGMT_OP_READ_DEF_SYSTEM_CONFIG,
-				 0, rp, sizeof(params));
+	ret = mgmt_cmd_complete(sk, hdev->id,
+				MGMT_OP_READ_DEF_SYSTEM_CONFIG,
+				0, &rp, sizeof(rp));
+	return ret;
 }
 
 #define TO_TLV(x)		((struct mgmt_tlv *)(x))
-- 
2.29.2.454.gaff20da3a2-goog

Re: [PATCH v11 4/5] Bluetooth: Refactor read default sys config for various types

[Marcel Holtmann]

Hi Howard,

> Refactor read default system configuration function so that it's capable
> of returning different types than u16
> 
> Signed-off-by: Howard Chung <howardchung@google.com>
> ---
> 
> (no changes since v8)
> 
> Changes in v8:
> - Update the commit title and message
> 
> net/bluetooth/mgmt_config.c | 140 +++++++++++++++++++++---------------
> 1 file changed, 84 insertions(+), 56 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel

[PATCH v11 5/5] Bluetooth: Add toggle to switch off interleave scan

[Howard Chung]

This patch add a configurable parameter to switch off the interleave
scan feature.

Signed-off-by: Howard Chung <howardchung@google.com>
Reviewed-by: Alain Michaud <alainm@chromium.org>
---

(no changes since v9)

Changes in v9:
- Update and rename the macro TLV_GET_LE8

Changes in v7:
- Fix bt_dev_warn arguemnt type warning

Changes in v6:
- Set EnableAdvMonInterleaveScan to 1 byte long

Changes in v4:
- Set EnableAdvMonInterleaveScan default to Disable
- Fix 80 chars limit in mgmt_config.c

 include/net/bluetooth/hci_core.h |  1 +
 net/bluetooth/hci_core.c         |  1 +
 net/bluetooth/hci_request.c      |  3 ++-
 net/bluetooth/mgmt_config.c      | 41 +++++++++++++++++++++++++-------
 4 files changed, 37 insertions(+), 9 deletions(-)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index cfede18709d8f..63c6d656564a1 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -363,6 +363,7 @@ struct hci_dev {
 	__u32		clock;
 	__u16		advmon_allowlist_duration;
 	__u16		advmon_no_filter_duration;
+	__u8		enable_advmon_interleave_scan;
 
 	__u16		devid_source;
 	__u16		devid_vendor;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 20506b31492d6..8cfcf43eb08fd 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3594,6 +3594,7 @@ struct hci_dev *hci_alloc_dev(void)
 
 	hdev->advmon_allowlist_duration = 300;
 	hdev->advmon_no_filter_duration = 500;
+	hdev->enable_advmon_interleave_scan = 0x00;	/* Default to disable */
 
 	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 0c326e32e240c..d0d0fbbb3fa57 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -1057,7 +1057,8 @@ void hci_req_add_le_passive_scan(struct hci_request *req)
 				      &own_addr_type))
 		return;
 
-	if (__hci_update_interleaved_scan(hdev))
+	if (hdev->enable_advmon_interleave_scan &&
+	    __hci_update_interleaved_scan(hdev))
 		return;
 
 	bt_dev_dbg(hdev, "interleave state %d", hdev->interleave_scan_state);
diff --git a/net/bluetooth/mgmt_config.c b/net/bluetooth/mgmt_config.c
index 282fbf82f3192..1deb0ca7a9297 100644
--- a/net/bluetooth/mgmt_config.c
+++ b/net/bluetooth/mgmt_config.c
@@ -17,12 +17,24 @@
 		__le16 value; \
 	} __packed _param_name_
 
+#define HDEV_PARAM_U8(_param_name_) \
+	struct {\
+		struct mgmt_tlv entry; \
+		__u8 value; \
+	} __packed _param_name_
+
 #define TLV_SET_U16(_param_code_, _param_name_) \
 	{ \
 		{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
 		cpu_to_le16(hdev->_param_name_) \
 	}
 
+#define TLV_SET_U8(_param_code_, _param_name_) \
+	{ \
+		{ cpu_to_le16(_param_code_), sizeof(__u8) }, \
+		hdev->_param_name_ \
+	}
+
 #define TLV_SET_U16_JIFFIES_TO_MSECS(_param_code_, _param_name_) \
 	{ \
 		{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
@@ -65,6 +77,7 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 		HDEV_PARAM_U16(def_le_autoconnect_timeout);
 		HDEV_PARAM_U16(advmon_allowlist_duration);
 		HDEV_PARAM_U16(advmon_no_filter_duration);
+		HDEV_PARAM_U8(enable_advmon_interleave_scan);
 	} __packed rp = {
 		TLV_SET_U16(0x0000, def_page_scan_type),
 		TLV_SET_U16(0x0001, def_page_scan_int),
@@ -97,6 +110,7 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 					     def_le_autoconnect_timeout),
 		TLV_SET_U16(0x001d, advmon_allowlist_duration),
 		TLV_SET_U16(0x001e, advmon_no_filter_duration),
+		TLV_SET_U8(0x001f, enable_advmon_interleave_scan),
 	};
 
 	bt_dev_dbg(hdev, "sock %p", sk);
@@ -109,6 +123,7 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 
 #define TO_TLV(x)		((struct mgmt_tlv *)(x))
 #define TLV_GET_LE16(tlv)	le16_to_cpu(*((__le16 *)(TO_TLV(tlv)->value)))
+#define TLV_GET_U8(tlv)		(*((__u8 *)(TO_TLV(tlv)->value)))
 
 int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 			  u16 data_len)
@@ -125,6 +140,7 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 	/* First pass to validate the tlv */
 	while (buffer_left >= sizeof(struct mgmt_tlv)) {
 		const u8 len = TO_TLV(buffer)->length;
+		size_t exp_type_len;
 		const u16 exp_len = sizeof(struct mgmt_tlv) +
 				    len;
 		const u16 type = le16_to_cpu(TO_TLV(buffer)->type);
@@ -170,20 +186,26 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 		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);
-
-				return mgmt_cmd_status(sk, hdev->id,
-					MGMT_OP_SET_DEF_SYSTEM_CONFIG,
-					MGMT_STATUS_INVALID_PARAMS);
-			}
+			exp_type_len = sizeof(u16);
+			break;
+		case 0x001f:
+			exp_type_len = sizeof(u8);
 			break;
 		default:
+			exp_type_len = 0;
 			bt_dev_warn(hdev, "unsupported parameter %u", type);
 			break;
 		}
 
+		if (exp_type_len && len != exp_type_len) {
+			bt_dev_warn(hdev, "invalid length %d, exp %zu for type %d",
+				    len, exp_type_len, type);
+
+			return mgmt_cmd_status(sk, hdev->id,
+				MGMT_OP_SET_DEF_SYSTEM_CONFIG,
+				MGMT_STATUS_INVALID_PARAMS);
+		}
+
 		buffer_left -= exp_len;
 		buffer += exp_len;
 	}
@@ -289,6 +311,9 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 		case 0x0001e:
 			hdev->advmon_no_filter_duration = TLV_GET_LE16(buffer);
 			break;
+		case 0x0001f:
+			hdev->enable_advmon_interleave_scan = TLV_GET_U8(buffer);
+			break;
 		default:
 			bt_dev_warn(hdev, "unsupported parameter %u", type);
 			break;
-- 
2.29.2.454.gaff20da3a2-goog

Re: [PATCH v11 5/5] Bluetooth: Add toggle to switch off interleave scan

[Marcel Holtmann]

Hi Howard,

> This patch add a configurable parameter to switch off the interleave
> scan feature.
> 
> Signed-off-by: Howard Chung <howardchung@google.com>
> Reviewed-by: Alain Michaud <alainm@chromium.org>
> ---
> 
> (no changes since v9)
> 
> Changes in v9:
> - Update and rename the macro TLV_GET_LE8
> 
> Changes in v7:
> - Fix bt_dev_warn arguemnt type warning
> 
> Changes in v6:
> - Set EnableAdvMonInterleaveScan to 1 byte long
> 
> Changes in v4:
> - Set EnableAdvMonInterleaveScan default to Disable
> - Fix 80 chars limit in mgmt_config.c
> 
> include/net/bluetooth/hci_core.h |  1 +
> net/bluetooth/hci_core.c         |  1 +
> net/bluetooth/hci_request.c      |  3 ++-
> net/bluetooth/mgmt_config.c      | 41 +++++++++++++++++++++++++-------
> 4 files changed, 37 insertions(+), 9 deletions(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel

RE: [v11,1/5] Bluetooth: Interleave with allowlist scan

[bluez.test.bot]

[-- Attachment #1: Type: text/plain, Size: 2378 bytes --]

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

Re: [PATCH v11 1/5] Bluetooth: Interleave with allowlist scan

[Marcel Holtmann]

Hi Howard,

> 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 <howardchung@google.com>
> Reviewed-by: Alain Michaud <alainm@chromium.org>
> Reviewed-by: Manish Mandlik <mmandlik@chromium.org>
> ---
> 
> 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(-)

patch has been applied to bluetooth-next tree.

Regards

Marcel