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Bluetooth: Introduce user channel flag for HCI devices

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This patch introduces a new user channel flag that allows to give full
control of a HCI device to a user application. The kernel will stay away
from the device and does not allow any further modifications of the
device states.

The existing raw flag is not used since it has a bit of unclear meaning
due to its legacy. Using a new flag makes the code clearer.

A device with the user channel flag set can still be enumerate using the
legacy API, but it does not longer enumerate using the new management
interface used by BlueZ 5 and beyond. This is intentional to not confuse
users of modern systems.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Marcel Holtmann
2013-08-26 21:40:51 -07:00
committed by Gustavo Padovan
parent c1c4f95670
commit 0736cfa8e5
4 changed files with 55 additions and 9 deletions
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9
net/bluetooth/mgmt.c
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@@ -339,6 +339,9 @@ static int read_index_list(struct sock *sk, struct hci_dev *hdev, void *data,
if (test_bit(HCI_SETUP, &d->dev_flags))
continue;
if (test_bit(HCI_USER_CHANNEL, &d->dev_flags))
continue;
if (!mgmt_valid_hdev(d))
continue;
@@ -3320,6 +3323,12 @@ int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
MGMT_STATUS_INVALID_INDEX);
goto done;
}
if (test_bit(HCI_USER_CHANNEL, &hdev->dev_flags)) {
err = cmd_status(sk, index, opcode,
MGMT_STATUS_INVALID_INDEX);
goto done;
}
}
if (opcode >= ARRAY_SIZE(mgmt_handlers) ||