Re: [PATCH v21 07/12] landlock: Support filesystem access-control

From: Mickaël Salaün
Date: Wed Oct 14 2020 - 15:13:50 EST



On 14/10/2020 20:52, Mickaël Salaün wrote:
>
> On 14/10/2020 20:07, James Morris wrote:
>> On Thu, 8 Oct 2020, Mickaël Salaün wrote:
>>
>>> +config ARCH_EPHEMERAL_STATES
>>> + def_bool n
>>> + help
>>> + An arch should select this symbol if it does not keep an internal kernel
>>> + state for kernel objects such as inodes, but instead relies on something
>>> + else (e.g. the host kernel for an UML kernel).
>>> +
>>
>> This is used to disable Landlock for UML, correct?
>
> Yes
>
>> I wonder if it could be
>> more specific: "ephemeral states" is a very broad term.
>>
>> How about something like ARCH_OWN_INODES ?
>
> Sounds good. We may need add new ones (e.g. for network socket, UID,
> etc.) in the future though.
>

Because UML is the exception here, it would be more convenient to keep
the inverted semantic. What about ARCH_NO_OWN_INODES or
ARCH_EPHEMERAL_INODES?