[PATCH 1/2] Bluetooth: Introduce HCI_CONN_FLAG_DEVICE_PRIVACY device flag

From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH 1/2] Bluetooth: Introduce HCI_CONN_FLAG_DEVICE_PRIVACY device flag
Date: Fri,  5 Nov 2021 14:13:18 -0700	[thread overview]
Message-ID: <20211105211319.424249-1-luiz.dentz@gmail.com> (raw)

From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

This introduces HCI_CONN_FLAG_DEVICE_PRIVACY which can be used by
userspace to indicate to the controller to use Device Privacy Mode to a
specific device.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
 include/net/bluetooth/hci_core.h | 1 +
 net/bluetooth/mgmt.c             | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index b5f061882c10..f28cb245adbb 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -160,6 +160,7 @@ struct bdaddr_list_with_flags {
 
 enum hci_conn_flags {
 	HCI_CONN_FLAG_REMOTE_WAKEUP,
+	HCI_CONN_FLAG_DEVICE_PRIVACY,
 	HCI_CONN_FLAG_MAX
 };
 
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 06384d761928..2062359a7bcb 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -4456,6 +4456,13 @@ static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
 		if (params) {
 			params->current_flags = current_flags;
 			status = MGMT_STATUS_SUCCESS;
+
+			/* Update passive scan if HCI_CONN_FLAG_DEVICE_PRIVACY
+			 * has been set.
+			 */
+			if (hci_conn_test_flag(HCI_CONN_FLAG_DEVICE_PRIVACY,
+					       params->current_flags))
+				hci_update_passive_scan(hdev);
 		} else {
 			bt_dev_warn(hdev, "No such LE device %pMR (0x%x)",
 				    &cp->addr.bdaddr,
-- 
2.31.1

