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Re: [PATCH 1/2] SYSCTL: root unregister routine introduced [message #44633 is a reply to message #44530]

Sat, 17 December 2011 22:30

ebiederm
Messages: 1354
Registered: February 2006

Senior Member

Stanislav Kinsbursky <skinsbursky@parallels.com> writes:

> 13.12.2011 02:52, Andrew Morton пишет:
>> On Mon, 12 Dec 2011 21:50:00 +0300
>> Stanislav Kinsbursky<skinsbursky@parallels.com> wrote:
>>
>>> This routine is required for SUNRPC sysctl's, which are going to be allocated,
>>> processed and destroyed per network namespace context.
>>> IOW, new sysctl root will be registered on network namespace creation and
>>> thus have to unregistered before network namespace destruction.
>>>
>>
>> It's a bit suspicious that such a mature subsystem as sysctl newly
>> needs its internals exported like this. Either a) the net namespaces
>> work is doing something which hasn't been done before or b) it is doing
>> something wrong.
>>
>> So, please explain further so we can confirm that it is a) and not b).
>>
>
> Hello, Andrew.
> The goal is to provide an ability to control and modify data by sysctl's in
> network namespace context. This is done by "net" sysctl's.
> But there are two more issues to solve:
> 1) Sysctl's have to be in /proc/sys/sunrpc

The sysctl root has nothing to with what directory the files show up in,
so this should not be an issue.

> 2) Sysctl's content should be accessible from creator's network context (not
> current user ones's).

Making the sunrpc sysctls per network namespace would seem to address
this. I don't see why you would need a new root to handle this case.

Eric

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[Message index]

		[PATCH 0/2] SYSCTL: export root handling routines By: Stanislav Kinsbursky on Mon, 12 December 2011 17:51
		[PATCH 2/2] SYSCTL: export root register and unregister routines By: Stanislav Kinsbursky on Mon, 12 December 2011 17:51
		[PATCH 1/2] SYSCTL: root unregister routine introduced By: Stanislav Kinsbursky on Mon, 12 December 2011 17:51
		Re: [PATCH 1/2] SYSCTL: root unregister routine introduced By: akpm on Mon, 12 December 2011 22:52
		Re: [PATCH 1/2] SYSCTL: root unregister routine introduced By: Stanislav Kinsbursky on Tue, 13 December 2011 09:02
		Re: Re: [PATCH 1/2] SYSCTL: root unregister routine introduced By: Glauber Costa on Tue, 13 December 2011 09:13
		Re: Re: [PATCH 1/2] SYSCTL: root unregister routine introduced By: Kinsbursky Stanislav on Tue, 13 December 2011 10:03
		Re: [PATCH 1/2] SYSCTL: root unregister routine introduced By: ebiederm on Sat, 17 December 2011 22:30
		Re: Re: [PATCH 1/2] SYSCTL: root unregister routine introduced By: Glauber Costa on Tue, 13 December 2011 10:04
		Re: Re: [PATCH 1/2] SYSCTL: root unregister routine introduced By: Kinsbursky Stanislav on Tue, 13 December 2011 10:15

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