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From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: linux-bluetooth@vger.kernel.org
Subject: [PATCH BlueZ] btdev: Fix using the callback return as command complete
Date: Fri, 22 Oct 2021 15:27:37 -0700	[thread overview]
Message-ID: <20211022222737.807013-1-luiz.dentz@gmail.com> (raw)

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

Command callback can only be used when generating a command status as
command complete can carry more than just the status.
---
 emulator/btdev.c | 120 +++++++++++++++++++++++++++++++++--------------
 1 file changed, 84 insertions(+), 36 deletions(-)

diff --git a/emulator/btdev.c b/emulator/btdev.c
index e129b5cda..7b311f347 100644
--- a/emulator/btdev.c
+++ b/emulator/btdev.c
@@ -3677,12 +3677,16 @@ static int cmd_add_al(struct btdev *dev, const void *data, uint8_t len)
 	 * HCI_LE_Create_Connection or HCI_LE_Extended_Create_Connection
 	 * command is outstanding.
 	 */
-	if (!al_can_change(dev))
-		return -EPERM;
+	if (!al_can_change(dev)) {
+		status = BT_HCI_ERR_COMMAND_DISALLOWED;
+		goto done;
+	}
 
 	/* Valid range for address type is 0x00 to 0x01 */
-	if (cmd->addr_type > 0x01)
-		return -EINVAL;
+	if (cmd->addr_type > 0x01) {
+		status = BT_HCI_ERR_INVALID_PARAMETERS;
+		goto done;
+	}
 
 	for (i = 0; i < dev->le_al_len; i++) {
 		struct btdev_al *al = &dev->le_al[i];
@@ -3694,18 +3698,25 @@ static int cmd_add_al(struct btdev *dev, const void *data, uint8_t len)
 			pos = i;
 	}
 
-	if (exists)
-		return -EALREADY;
+	/* If the device is already in the Filter Accept List, the Controller
+	 * should not add the device to the Filter Accept List again and should
+	 * return success.
+	 */
+	if (exists) {
+		status = BT_HCI_ERR_SUCCESS;
+		goto done;
+	}
 
 	if (pos < 0) {
-		cmd_status(dev, BT_HCI_ERR_MEM_CAPACITY_EXCEEDED,
-					BT_HCI_CMD_LE_ADD_TO_ACCEPT_LIST);
-		return 0;
+		status = BT_HCI_ERR_MEM_CAPACITY_EXCEEDED;
+		goto done;
 	}
 
 	al_add(&dev->le_al[pos], cmd->addr_type, (bdaddr_t *)&cmd->addr);
 
 	status = BT_HCI_ERR_SUCCESS;
+
+done:
 	cmd_complete(dev, BT_HCI_CMD_LE_ADD_TO_ACCEPT_LIST,
 						&status, sizeof(status));
 
@@ -3728,12 +3739,16 @@ static int cmd_remove_al(struct btdev *dev, const void *data, uint8_t len)
 	 * HCI_LE_Create_Connection or HCI_LE_Extended_Create_Connection
 	 * command is outstanding.
 	 */
-	if (!al_can_change(dev))
-		return -EPERM;
+	if (!al_can_change(dev)) {
+		status = BT_HCI_ERR_COMMAND_DISALLOWED;
+		goto done;
+	}
 
 	/* Valid range for address type is 0x00 to 0x01 */
-	if (cmd->addr_type > 0x01)
-		return -EINVAL;
+	if (cmd->addr_type > 0x01) {
+		status = BT_HCI_ERR_INVALID_PARAMETERS;
+		goto done;
+	}
 
 	for (i = 0; i < dev->le_al_len; i++) {
 		struct btdev_al *al = &dev->le_al[i];
@@ -3750,10 +3765,14 @@ static int cmd_remove_al(struct btdev *dev, const void *data, uint8_t len)
 		}
 	}
 
-	if (i == dev->le_al_len)
-		return -EINVAL;
+	if (i == dev->le_al_len) {
+		status = BT_HCI_ERR_INVALID_PARAMETERS;
+		goto done;
+	}
 
 	status = BT_HCI_ERR_SUCCESS;
+
+done:
 	cmd_complete(dev, BT_HCI_CMD_LE_REMOVE_FROM_ACCEPT_LIST,
 						&status, sizeof(status));
 
@@ -3774,12 +3793,16 @@ static int cmd_add_rl(struct btdev *dev, const void *data, uint8_t len)
 	 * • an HCI_LE_Create_Connection, HCI_LE_Extended_Create_Connection,
 	 * or HCI_LE_Periodic_Advertising_Create_Sync command is outstanding.
 	 */
-	if (dev->le_adv_enable || dev->le_scan_enable)
-		return -EPERM;
+	if (dev->le_adv_enable || dev->le_scan_enable) {
+		status = BT_HCI_ERR_COMMAND_DISALLOWED;
+		goto done;
+	}
 
 	/* Valid range for address type is 0x00 to 0x01 */
-	if (cmd->addr_type > 0x01)
-		return -EINVAL;
+	if (cmd->addr_type > 0x01) {
+		status = BT_HCI_ERR_INVALID_PARAMETERS;
+		goto done;
+	}
 
 	for (i = 0; i < dev->le_rl_len; i++) {
 		struct btdev_rl *rl = &dev->le_rl[i];
@@ -3791,13 +3814,18 @@ static int cmd_add_rl(struct btdev *dev, const void *data, uint8_t len)
 			pos = i;
 	}
 
-	if (exists)
-		return -EALREADY;
+	/* If an entry already exists in the resolving list with the same four
+	 * parameter values, the Controller shall either reject the command or
+	 * not add the device to the resolving list again and return success.
+	 */
+	if (exists) {
+		status = BT_HCI_ERR_SUCCESS;
+		goto done;
+	}
 
 	if (pos < 0) {
-		cmd_status(dev, BT_HCI_ERR_MEM_CAPACITY_EXCEEDED,
-					BT_HCI_CMD_LE_ADD_TO_RESOLV_LIST);
-		return 0;
+		status = BT_HCI_ERR_MEM_CAPACITY_EXCEEDED;
+		goto done;
 	}
 
 	dev->le_rl[pos].type = cmd->addr_type;
@@ -3806,6 +3834,8 @@ static int cmd_add_rl(struct btdev *dev, const void *data, uint8_t len)
 	memcpy(dev->le_rl[pos].local_irk, cmd->local_irk, 16);
 
 	status = BT_HCI_ERR_SUCCESS;
+
+done:
 	cmd_complete(dev, BT_HCI_CMD_LE_ADD_TO_RESOLV_LIST,
 						&status, sizeof(status));
 
@@ -3825,12 +3855,16 @@ static int cmd_remove_rl(struct btdev *dev, const void *data, uint8_t len)
 	 * • an HCI_LE_Create_Connection, HCI_LE_Extended_Create_Connection,
 	 * or HCI_LE_Periodic_Advertising_Create_Sync command is outstanding.
 	 */
-	if (dev->le_adv_enable || dev->le_scan_enable)
-		return -EPERM;
+	if (dev->le_adv_enable || dev->le_scan_enable) {
+		status = BT_HCI_ERR_COMMAND_DISALLOWED;
+		goto done;
+	}
 
 	/* Valid range for address type is 0x00 to 0x01 */
-	if (cmd->addr_type > 0x01)
-		return -EINVAL;
+	if (cmd->addr_type > 0x01) {
+		status = BT_HCI_ERR_INVALID_PARAMETERS;
+		goto done;
+	}
 
 	for (i = 0; i < dev->le_rl_len; i++) {
 		struct btdev_rl *rl = &dev->le_rl[i];
@@ -3841,10 +3875,14 @@ static int cmd_remove_rl(struct btdev *dev, const void *data, uint8_t len)
 		}
 	}
 
-	if (i == dev->le_rl_len)
-		return -EINVAL;
+	if (i == dev->le_rl_len) {
+		status = BT_HCI_ERR_INVALID_PARAMETERS;
+		goto done;
+	}
 
 	status = BT_HCI_ERR_SUCCESS;
+
+done:
 	cmd_complete(dev, BT_HCI_CMD_LE_REMOVE_FROM_RESOLV_LIST,
 						&status, sizeof(status));
 
@@ -3862,12 +3900,16 @@ static int cmd_clear_rl(struct btdev *dev, const void *data, uint8_t len)
 	 * • an HCI_LE_Create_Connection, HCI_LE_Extended_Create_Connection,
 	 * or HCI_LE_Periodic_Advertising_Create_Sync command is outstanding.
 	 */
-	if (dev->le_adv_enable || dev->le_scan_enable)
-		return -EPERM;
+	if (dev->le_adv_enable || dev->le_scan_enable) {
+		status = BT_HCI_ERR_COMMAND_DISALLOWED;
+		goto done;
+	}
 
 	rl_clear(dev);
 
 	status = BT_HCI_ERR_SUCCESS;
+
+done:
 	cmd_complete(dev, BT_HCI_CMD_LE_CLEAR_RESOLV_LIST,
 						&status, sizeof(status));
 
@@ -3894,12 +3936,15 @@ static int cmd_read_peer_rl_addr(struct btdev *dev, const void *data,
 	struct bt_hci_rsp_le_read_peer_resolv_addr rsp;
 
 	/* Valid range for address type is 0x00 to 0x01 */
-	if (cmd->addr_type > 0x01)
-		return -EINVAL;
+	if (cmd->addr_type > 0x01) {
+		rsp.status = BT_HCI_ERR_INVALID_PARAMETERS;
+		goto done;
+	}
 
 	rsp.status = BT_HCI_ERR_UNKNOWN_CONN_ID;
 	memset(rsp.addr, 0, 6);
 
+done:
 	cmd_complete(dev, BT_HCI_CMD_LE_READ_PEER_RESOLV_ADDR,
 							&rsp, sizeof(rsp));
 
@@ -3913,12 +3958,15 @@ static int cmd_read_local_rl_addr(struct btdev *dev, const void *data,
 	struct bt_hci_rsp_le_read_local_resolv_addr rsp;
 
 	/* Valid range for address type is 0x00 to 0x01 */
-	if (cmd->addr_type > 0x01)
-		return -EINVAL;
+	if (cmd->addr_type > 0x01) {
+		rsp.status = BT_HCI_ERR_INVALID_PARAMETERS;
+		goto done;
+	}
 
 	rsp.status = BT_HCI_ERR_UNKNOWN_CONN_ID;
 	memset(rsp.addr, 0, 6);
 
+done:
 	cmd_complete(dev, BT_HCI_CMD_LE_READ_LOCAL_RESOLV_ADDR,
 							&rsp, sizeof(rsp));
 
-- 
2.31.1


             reply	other threads:[~2021-10-22 22:27 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-22 22:27 Luiz Augusto von Dentz [this message]
2021-10-25 18:21 ` [PATCH BlueZ] btdev: Fix using the callback return as command complete Luiz Augusto von Dentz

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