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* [PATCH v7 1/4] Bluetooth: Interleave with allowlist scan
@ 2020-09-29 11:25 Howard Chung
  2020-09-29 11:25 ` [PATCH v7 2/4] Bluetooth: Handle system suspend resume case Howard Chung
                   ` (2 more replies)
  0 siblings, 3 replies; 5+ messages in thread
From: Howard Chung @ 2020-09-29 11:25 UTC (permalink / raw)
  To: linux-bluetooth, marcel, luiz.dentz
  Cc: mmandlik, alainm, mcchou, Howard Chung, David S. Miller,
	Jakub Kicinski, Johan Hedberg, linux-kernel, netdev

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 v7:
- Fix test bot warning

Changes in v6:
- Change the type of enable_advmon_interleave_scan to u8

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         |   4 +
 net/bluetooth/hci_request.c      | 133 +++++++++++++++++++++++++++++--
 net/bluetooth/mgmt_config.c      |  10 +++
 4 files changed, 150 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 f30a1f5950e15..6c8850149265a 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3592,6 +3592,10 @@ struct hci_dev *hci_alloc_dev(void)
 	hdev->cur_adv_instance = 0x00;
 	hdev->adv_instance_timeout = 0;
 
+	/* The default values will be chosen in the future */
+	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 d2b06f5c93804..ba3016cc0b573 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -378,6 +378,56 @@ 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, "%s cancelling interleave scan", hdev->name);
+
+	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 (hci_is_adv_monitoring(hdev) &&
+	    !(list_empty(&hdev->pend_le_conns) &&
+	      list_empty(&hdev->pend_le_reports))) {
+		if (!is_interleave_scanning(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.
+			 */
+			start_interleave_scan(hdev);
+			bt_dev_dbg(hdev, "%s starting interleave scan",
+				   hdev->name);
+			return true;
+		}
+	} else if (is_interleave_scanning(hdev)) {
+		/* If the interleave condition no longer holds, cancel
+		 * the existed interleave scan.
+		 */
+		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 +500,8 @@ 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, "%s starting background scanning",
+			   hdev->name);
 	}
 }
 
@@ -844,12 +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 */
@@ -1002,6 +1057,9 @@ void hci_req_add_le_passive_scan(struct hci_request *req)
 				      &own_addr_type))
 		return;
 
+	if (__hci_update_interleaved_scan(hdev))
+		return;
+
 	/* Adding or removing entries from the white list must
 	 * happen before enabling scanning. The controller does
 	 * not allow white list modification while scanning.
@@ -1871,6 +1929,64 @@ 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:
+	default:
+		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)
@@ -3292,6 +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)
@@ -3311,4 +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;
-- 
2.28.0.709.gb0816b6eb0-goog


^ permalink raw reply related	[flat|nested] 5+ messages in thread

* [PATCH v7 2/4] Bluetooth: Handle system suspend resume case
  2020-09-29 11:25 [PATCH v7 1/4] Bluetooth: Interleave with allowlist scan Howard Chung
@ 2020-09-29 11:25 ` Howard Chung
  2020-09-29 11:25 ` [PATCH v7 3/4] Bluetooth: Handle active scan case Howard Chung
  2020-09-29 11:25 ` [PATCH v7 4/4] Bluetooth: Add toggle to switch off interleave scan Howard Chung
  2 siblings, 0 replies; 5+ messages in thread
From: Howard Chung @ 2020-09-29 11:25 UTC (permalink / raw)
  To: linux-bluetooth, marcel, luiz.dentz
  Cc: mmandlik, alainm, mcchou, Howard Chung, Abhishek Pandit-Subedi,
	David S. Miller, Jakub Kicinski, Johan Hedberg, linux-kernel,
	netdev

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 ba3016cc0b573..db44680fbe9c9 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -1281,8 +1281,10 @@ 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);
-- 
2.28.0.709.gb0816b6eb0-goog


^ permalink raw reply related	[flat|nested] 5+ messages in thread

* [PATCH v7 3/4] Bluetooth: Handle active scan case
  2020-09-29 11:25 [PATCH v7 1/4] Bluetooth: Interleave with allowlist scan Howard Chung
  2020-09-29 11:25 ` [PATCH v7 2/4] Bluetooth: Handle system suspend resume case Howard Chung
@ 2020-09-29 11:25 ` Howard Chung
  2020-09-29 11:25 ` [PATCH v7 4/4] Bluetooth: Add toggle to switch off interleave scan Howard Chung
  2 siblings, 0 replies; 5+ messages in thread
From: Howard Chung @ 2020-09-29 11:25 UTC (permalink / raw)
  To: linux-bluetooth, marcel, luiz.dentz
  Cc: mmandlik, alainm, mcchou, Howard Chung, David S. Miller,
	Jakub Kicinski, Johan Hedberg, linux-kernel, netdev

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 db44680fbe9c9..4048c82d4257f 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
-- 
2.28.0.709.gb0816b6eb0-goog


^ permalink raw reply related	[flat|nested] 5+ messages in thread

* [PATCH v7 4/4] Bluetooth: Add toggle to switch off interleave scan
  2020-09-29 11:25 [PATCH v7 1/4] Bluetooth: Interleave with allowlist scan Howard Chung
  2020-09-29 11:25 ` [PATCH v7 2/4] Bluetooth: Handle system suspend resume case Howard Chung
  2020-09-29 11:25 ` [PATCH v7 3/4] Bluetooth: Handle active scan case Howard Chung
@ 2020-09-29 11:25 ` Howard Chung
  2020-09-29 14:46   ` Jakub Kicinski
  2 siblings, 1 reply; 5+ messages in thread
From: Howard Chung @ 2020-09-29 11:25 UTC (permalink / raw)
  To: linux-bluetooth, marcel, luiz.dentz
  Cc: mmandlik, alainm, mcchou, Howard Chung, David S. Miller,
	Jakub Kicinski, Johan Hedberg, linux-kernel, netdev

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>
---

Changes in v7:
- Fix test bot warning

Changes in v6:
- Change the type of enable_advmon_interleave_scan to u8

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, 33 insertions(+), 13 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 6c8850149265a..c37b2d5395abc 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3595,6 +3595,7 @@ struct hci_dev *hci_alloc_dev(void)
 	/* The default values will be chosen in the future */
 	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 4048c82d4257f..23381f263678b 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;
 
 	/* Adding or removing entries from the white list must
diff --git a/net/bluetooth/mgmt_config.c b/net/bluetooth/mgmt_config.c
index 2d3ad288c78ac..a9d580b4aaad1 100644
--- a/net/bluetooth/mgmt_config.c
+++ b/net/bluetooth/mgmt_config.c
@@ -14,7 +14,13 @@
 #define HDEV_PARAM_U16(_param_code_, _param_name_) \
 { \
 	{ cpu_to_le16(_param_code_), sizeof(__u16) }, \
-	{ cpu_to_le16(hdev->_param_name_) } \
+	{ .value_le16 = cpu_to_le16(hdev->_param_name_) } \
+}
+
+#define HDEV_PARAM_U8(_param_code_, _param_name_) \
+{ \
+	{ (_param_code_), sizeof(__u8) }, \
+	{ .value_u8 = hdev->_param_name_ } \
 }
 
 #define HDEV_PARAM_U16_JIFFIES_TO_MSECS(_param_code_, _param_name_) \
@@ -30,11 +36,12 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 		struct mgmt_tlv entry;
 		union {
 			/* This is a simplification for now since all values
-			 * are 16 bits.  In the future, this code may need
+			 * are fixed bits.  In the future, this code may need
 			 * refactoring to account for variable length values
 			 * and properly calculate the required buffer size.
 			 */
-			__le16 value;
+			__le16 value_le16;
+			__u8 value_u8;
 		};
 	} __packed params[] = {
 		/* Please see mgmt-api.txt for documentation of these values */
@@ -69,6 +76,7 @@ int read_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 						def_le_autoconnect_timeout),
 		HDEV_PARAM_U16(0x001d, advmon_allowlist_duration),
 		HDEV_PARAM_U16(0x001e, advmon_no_filter_duration),
+		HDEV_PARAM_U8(0x001f, enable_advmon_interleave_scan),
 	};
 	struct mgmt_rp_read_def_system_config *rp = (void *)params;
 
@@ -81,7 +89,7 @@ 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)
 {
@@ -100,6 +108,7 @@ int set_def_system_config(struct sock *sk, struct hci_dev *hdev, void *data,
 		const u16 exp_len = sizeof(struct mgmt_tlv) +
 				    len;
 		const u16 type = le16_to_cpu(TO_TLV(buffer)->type);
+		size_t exp_data_len = 0;
 
 		if (buffer_left < exp_len) {
 			bt_dev_warn(hdev, "invalid len left %d, exp >= %d",
@@ -142,20 +151,25 @@ 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_data_len = sizeof(u16);
+			break;
+		case 0x001f:
+			exp_data_len = sizeof(u8);
 			break;
 		default:
 			bt_dev_warn(hdev, "unsupported parameter %u", type);
 			break;
 		}
 
+		if (exp_data_len && len != exp_data_len) {
+			bt_dev_warn(hdev, "invalid length %d, exp %zu for type %d",
+				    len, exp_data_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;
 	}
@@ -261,6 +275,9 @@ 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;
-- 
2.28.0.709.gb0816b6eb0-goog


^ permalink raw reply related	[flat|nested] 5+ messages in thread

* Re: [PATCH v7 4/4] Bluetooth: Add toggle to switch off interleave scan
  2020-09-29 11:25 ` [PATCH v7 4/4] Bluetooth: Add toggle to switch off interleave scan Howard Chung
@ 2020-09-29 14:46   ` Jakub Kicinski
  0 siblings, 0 replies; 5+ messages in thread
From: Jakub Kicinski @ 2020-09-29 14:46 UTC (permalink / raw)
  To: Howard Chung
  Cc: linux-bluetooth, marcel, luiz.dentz, mmandlik, alainm, mcchou,
	David S. Miller, Johan Hedberg, linux-kernel, netdev

On Tue, 29 Sep 2020 19:25:26 +0800 Howard Chung wrote:
> 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>

One more:

net/bluetooth/mgmt_config.c:79:17: warning: incorrect type in initializer (different base types)
net/bluetooth/mgmt_config.c:79:17:    expected restricted __le16 [usertype] type
net/bluetooth/mgmt_config.c:79:17:    got int

^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2020-09-29 14:46 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-09-29 11:25 [PATCH v7 1/4] Bluetooth: Interleave with allowlist scan Howard Chung
2020-09-29 11:25 ` [PATCH v7 2/4] Bluetooth: Handle system suspend resume case Howard Chung
2020-09-29 11:25 ` [PATCH v7 3/4] Bluetooth: Handle active scan case Howard Chung
2020-09-29 11:25 ` [PATCH v7 4/4] Bluetooth: Add toggle to switch off interleave scan Howard Chung
2020-09-29 14:46   ` Jakub Kicinski

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