[Devel] [PATCH rh7] ve: Add a ability to show ve.mount_opts

[Kirill Tkhai]

On 26.08.2015 17:40, Konstantin Khorenko wrote:
> 
> On 07/20/2015 10:05 PM, Maxim Patlasov wrote:
>> On 07/14/2015 01:27 AM, Kirill Tkhai wrote:
>>> В Пн, 13/07/2015 в 12:38 -0700, Maxim Patlasov пишет:
>>>> On 07/08/2015 04:50 AM, Kirill Tkhai wrote:
>>>>> ...
>>>>>> Why do we need to show hidden options to CT' user? He/she doesn't
>>>>>> see
>>>>>>
>>>>>> ".balloon" file, so it doesn't seem consistent to show
>>>>>> "balloon_ino=N".
>>>>> But this way "read" won't show all written using "write". It may
>>>>> confuse users or vzctl developers.
>>>>>
>>>>> I think more debug info won't be worse.
>>>> Sorry for delay, I somehow missed your reply in my inbox folder. Are
>>>> these 'read' and 'write' allowed only from host system (ve0) or
>>>> inside
>>>> CT as well?
>>> It's allowed from inside a CT like other ve cgroup files.
>>> But it's not a problem of this patch, it's a generic problem,
>>> because mounting of ve cgroup from CT is not prohibited for now.
>>> Please, see cgroup_mount() for the details.
>>
>> OK.
> 
> So, let's continue here:
> * by default ve cgroup is not visible from inside a CT
> 
> * currently it's possible to mount ve cgroup inside a CT, but this is temporarily, we'll disable this
>   https://jira.sw.ru/browse/PSBM-34291
> 
> * this patch allows to see mount options via ve cgroup =>
>   after PSBM-34291 is fixed, mount options will be visible only from ve0 (host)
> 
> * for host it's OK to see all hidden options
> 
> Kirill, Maxim, please ack that i understand the situation correctly here,
> and i'll apply the patch.

Yeah, the above is true.