Hi Luiz,
>>> This adds support for BT_{SND,RCV}BUF so userspace can set MTU based on
>>> the channel usage.
>>>
>>> Fixes: https://github.com/bluez/bluez/issues/201
>>>
>>> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
>>> ---
>>> net/bluetooth/hci_sock.c | 102 ++++++++++++++++++++++++++++++++++-----
>>> 1 file changed, 91 insertions(+), 11 deletions(-)
>>
>> so I applied patches 1, 3 and 4 to bluetooth-next tree.
>>
>> The patch 2 needs a more details review when I have time since I remember there were cases where the SKB copy was really needed.
>
> Is that something not covered by CI testing? Note we still have a copy
> done internally with create_monitor_ctrl_command.
there are cases where the SKB handed down is in hdev->send() and that one is owned by the driver to make whatever modifications to headroom it pleases. So if the stack needs to send it out via other sockets, it needs a copy.
We can optimize here, but need to be careful.
Regards
Marcel
