linux-kernel - [PATCH 1/1] Bluetooth: Update add

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Date:   Wed, 25 Mar 2020 22:39:17 -0700
From:   Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
To:     marcel@...tmann.org
Cc:     linux-bluetooth@...r.kernel.org,
        chromeos-bluetooth-upstreaming@...omium.org,
        Abhishek Pandit-Subedi <abhishekpandit@...omium.org>,
        "David S. Miller" <davem@...emloft.net>,
        Johan Hedberg <johan.hedberg@...il.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 1/1] Bluetooth: Update add_device with wakeable actions

Add new actions to add_device to allow it to set or unset a device as
wakeable. When the set wakeable and unset wakeable actions are used, the
autoconnect property is not updated and the device is not added to the
whitelist (if BR/EDR).

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@...omium.org>
---

 net/bluetooth/mgmt.c | 56 ++++++++++++++++++++++++++++++++++++--------
 1 file changed, 46 insertions(+), 10 deletions(-)

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 6552003a170e..8688673542b3 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -5775,6 +5775,7 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
 		      void *data, u16 len)
 {
 	struct mgmt_cp_add_device *cp = data;
+	struct hci_conn_params *params;
 	u8 auto_conn, addr_type;
 	int err;
 
@@ -5786,7 +5787,7 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
 					 MGMT_STATUS_INVALID_PARAMS,
 					 &cp->addr, sizeof(cp->addr));
 
-	if (cp->action != 0x00 && cp->action != 0x01 && cp->action != 0x02)
+	if (cp->action > 0x04)
 		return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
 					 MGMT_STATUS_INVALID_PARAMS,
 					 &cp->addr, sizeof(cp->addr));
@@ -5794,8 +5795,35 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
 	hci_dev_lock(hdev);
 
 	if (cp->addr.type == BDADDR_BREDR) {
-		/* Only incoming connections action is supported for now */
-		if (cp->action != 0x01) {
+		switch (cp->action) {
+		case 0x3:
+			/* Set wakeable */
+			err = hci_bdaddr_list_add(&hdev->wakeable,
+						  &cp->addr.bdaddr,
+						  cp->addr.type);
+			if (err && err != -EEXIST)
+				goto unlock;
+			break;
+		case 0x4:
+			/* Remove wakeable */
+			err = hci_bdaddr_list_del(&hdev->wakeable,
+						  &cp->addr.bdaddr,
+						  cp->addr.type);
+			if (err)
+				goto unlock;
+
+			break;
+		case 0x1:
+			/* Allow incoming connection */
+			err = hci_bdaddr_list_add(&hdev->whitelist,
+						  &cp->addr.bdaddr,
+						  cp->addr.type);
+			if (err && err != -EEXIST)
+				goto unlock;
+
+			hci_req_update_scan(hdev);
+			break;
+		default:
 			err = mgmt_cmd_complete(sk, hdev->id,
 						MGMT_OP_ADD_DEVICE,
 						MGMT_STATUS_INVALID_PARAMS,
@@ -5803,13 +5831,6 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
 			goto unlock;
 		}
 
-		err = hci_bdaddr_list_add(&hdev->whitelist, &cp->addr.bdaddr,
-					  cp->addr.type);
-		if (err)
-			goto unlock;
-
-		hci_req_update_scan(hdev);
-
 		goto added;
 	}
 
@@ -5834,6 +5855,21 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
 		goto unlock;
 	}
 
+	/* Only allow wakeable property to be set/unset on existing device */
+	if (cp->action == 0x03 || cp->action == 0x04) {
+		params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
+						addr_type);
+		if (!params) {
+			err = mgmt_cmd_complete(sk, hdev->id,
+						MGMT_OP_ADD_DEVICE,
+						MGMT_STATUS_FAILED, &cp->addr,
+						sizeof(cp->addr));
+		}
+
+		params->wakeable = cp->action == 0x03;
+		goto added;
+	}
+
 	/* If the connection parameters don't exist for this device,
 	 * they will be created and configured with defaults.
 	 */
-- 
2.25.1.696.g5e7596f4ac-goog