>> On 20 Aug 2019, at 10:11, Milosz Wasilewski <milosz.wasilewski at linaro.org> wrote:
>>>
>>> On Tue, 30 Jul 2019 at 14:22, Tim Jaacks <tim.jaacks at garz-fricke.com> wrote:
>>>>
>>>> Hello everyone,
>>>>
>>>> I have the following entry in my lxc device dictionary:
>>>>
>>>> {% set static_info = [
>>>> {'board_id': 'FTXTBHMA'},
>>>> ] %}
>>>>
>>>> This adds my USB-serial converter installed on the worker machine to the LXC. It appears correctly in the LXC:
>>>>
>>>> root at lxc-generic-remote-5937:~# ls -la /dev/ttyUSB*
>>>> crw-r----- 1 root root 188, 0 Jul 30 13:15 /dev/ttyUSB0
>>>> crw-r----- 1 root root 188, 1 Jul 30 13:15 /dev/ttyUSB1
>>>> crw-r----- 1 root root 188, 2 Jul 30 13:15 /dev/ttyUSB2
>>>> crw-r----- 1 root root 188, 3 Jul 30 13:15 /dev/ttyUSB3
>>>>
>>>> I cannot read from or write to it, though:
>>>>
>>>> root at lxc-generic-remote-5937:~# cat /dev/ttyUSB0
>>>> cat: /dev/ttyUSB0: Operation not permitted
>>>>
>>>> This does not seem to be a permission issue in the LXC, it fails even if I set all permissions:
>>>>
>>>> root at lxc-generic-remote-5937:~# chmod a+rwx /dev/ttyUSB0
>>>> root at lxc-generic-remote-5937:~# cat /dev/ttyUSB0
>>>> cat: /dev/ttyUSB0: Operation not permitted
>>>>
>>>> Does anybody have an idea what is missing here?
>>>
>>> @Dave
>>> Do we have any special 'passthrough' scripts for lxc? It works in case
>>> of hikey-bl and x15-bl so I'm not sure what Tim might be missing.
>>
>>I’m making the assumption that this is a permanently connected serial device, hence the ’static_info’ entry in the device dict. I’m
also assuming that, before running up the lxc you can cat from the device?
>
>Yes, it is a permanently connected serial device. And yes, I can access the device directly from the worker.
>
>>If it’s *not* a permanent device you need to set the serial as:
>>
>>{% set device_info = [{'board_id': 'FTXTBHMA'}] %}
>>
>>
>>So that it is triggered to pass through when it becomes available to LAVA.
>>
>>Also, reading it, you say this is set in your lxc device-dict? Is that a misunderstanding on my part? Usually that information goes
in the DUT device-dict.
>
>Yes, I set this in my LXC device dict, because the serial device is connected to the worker the LXC is running on. Is this wrong? When
I add the line to my device DUT, the serial device is not added anywhere.
>
>To make it clear: I am using this in a multinode scenario, where I have two devices:
>
>1. the DUT
>2. an LXC running on the LAVA worker
>
>The USB end of the serial device I am trying to use it connected to the LAVA worker, the serial end is connected to the DUT.
>With the static_info in the LXC dict, I can see the device nodes in the LXC. But I cannot read from or write to them.
OK, I found out that this is only true if I am connected to the LXC via SSH (using a hacking session). When I connect to the LXC from
the worker via lxc-attach, then reading and writing works correctly. Why is this a difference? In both cases, the login prompt looks like this:
root@lxc-generic-remote-6967:/#
And “whoami” returns “root”. So why is reading and writing not permitted when I am connected via SSH?
>>Other than that, if all else fails, I can set the same environment up here and see if I can duplicate it.
Might take a while to get to it though.
>>
>>Thanks
>>
>>Dave
>
>Mit freundlichen Grüßen / Best regards
>Tim Jaacks
>DEVELOPMENT ENGINEER
>Garz & Fricke GmbH
>Tempowerkring 2
>21079 Hamburg
>Direct: +49 40 791 899 - 55
>Fax: +49 40 791899 - 39
>tim.jaacks@garz-fricke.com
>www.garz-fricke.com
>WE MAKE IT YOURS!
>
>Sitz der Gesellschaft: D-21079 Hamburg
>Registergericht: Amtsgericht Hamburg, HRB 60514
>Geschäftsführer: Matthias Fricke, Manfred Garz, Marc-Michael Braun
>
Mit freundlichen Grüßen / Best regards
Tim Jaacks
DEVELOPMENT ENGINEER
Garz & Fricke GmbH
Tempowerkring 2
21079 Hamburg
Direct: +49 40 791 899 - 55
Fax: +49 40 791899 - 39
tim.jaacks@garz-fricke.com
www.garz-fricke.com
WE MAKE IT YOURS!
Sitz der Gesellschaft: D-21079 Hamburg
Registergericht: Amtsgericht Hamburg, HRB 60514
Geschäftsführer: Matthias Fricke, Manfred Garz, Marc-Michael Braun