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nets: status of sysfs with netns [message #28347] Fri, 14 March 2008 15:38 Go to next message
Benjamin Thery is currently offline  Benjamin Thery
Messages: 79
Registered: March 2007
Member
Eric, Pavel,

I haven't followed everything about the sysfs/netns issue recently and I 
think I have missed some of its recent developments in the past weeks. 
So I'm wondering what is the current status? Is anyone still working on it?

As several netns patches for IPv4 and IPv6 have already been merged in 
net-2.6.26, it would be great to have the sysfs part also to help people 
who want test netns.
Right now, it is a pain to boot and test a system with CONFIG_SYSFS=n.

(I know the problem is not trivial and won't be easy to solve. I just 
want to be sure it is not forgotten)

Pavel, I've heard you sent (or have) a patch that prevents sysfs access 
from a "child" netns. A patch that can be a good workaround until we 
have the full thing ready. I can't find it in mailing lists archives, 
can you give some hints about where to find it? :)

Thanks a lot.

Benjamin

-- 
B e n j a m i n   T h e r y  - BULL/DT/Open Software R&D

    http://www.bull.com
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Re: nets: status of sysfs with netns [message #28348 is a reply to message #28347] Fri, 14 March 2008 15:44 Go to previous messageGo to next message
Pavel Emelianov is currently offline  Pavel Emelianov
Messages: 1149
Registered: September 2006
Senior Member
Benjamin Thery wrote:
> Eric, Pavel,
> 
> I haven't followed everything about the sysfs/netns issue recently and I 
> think I have missed some of its recent developments in the past weeks. 
> So I'm wondering what is the current status? Is anyone still working on it?

I'm thinking on it, but have no graceful solution :( Sysfs is a big...
no - HUUUUUUUUUUGE problem.

> As several netns patches for IPv4 and IPv6 have already been merged in 
> net-2.6.26, it would be great to have the sysfs part also to help people 
> who want test netns.
> Right now, it is a pain to boot and test a system with CONFIG_SYSFS=n.
> 
> (I know the problem is not trivial and won't be easy to solve. I just 
> want to be sure it is not forgotten)

It is (unfortunately) not.

> Pavel, I've heard you sent (or have) a patch that prevents sysfs access 
> from a "child" netns. A patch that can be a good workaround until we 
> have the full thing ready. I can't find it in mailing lists archives, 
> can you give some hints about where to find it? :)

Hm. I haven't had plans to do such things actually.

> Thanks a lot.
> 
> Benjamin
> 

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Re: nets: status of sysfs with netns [message #28351 is a reply to message #28348] Fri, 14 March 2008 15:54 Go to previous messageGo to next message
Benjamin Thery is currently offline  Benjamin Thery
Messages: 79
Registered: March 2007
Member
Pavel Emelyanov wrote:
> Benjamin Thery wrote:
>> Eric, Pavel,
>>
>> I haven't followed everything about the sysfs/netns issue recently and I 
>> think I have missed some of its recent developments in the past weeks. 
>> So I'm wondering what is the current status? Is anyone still working on it?
> 
> I'm thinking on it, but have no graceful solution :( Sysfs is a big...
> no - HUUUUUUUUUUGE problem.

Agreed.

>> As several netns patches for IPv4 and IPv6 have already been merged in 
>> net-2.6.26, it would be great to have the sysfs part also to help people 
>> who want test netns.
>> Right now, it is a pain to boot and test a system with CONFIG_SYSFS=n.
>>
>> (I know the problem is not trivial and won't be easy to solve. I just 
>> want to be sure it is not forgotten)
> 
> It is (unfortunately) not.
> 
>> Pavel, I've heard you sent (or have) a patch that prevents sysfs access 
>> from a "child" netns. A patch that can be a good workaround until we 
>> have the full thing ready. I can't find it in mailing lists archives, 
>> can you give some hints about where to find it? :)
> 
> Hm. I haven't had plans to do such things actually.

Oh, that explains why I didn't find it :)
I must have misunderstood what I heard...

> 
>> Thanks a lot.
>>
>> Benjamin
>>
> 
> 
> 


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    http://www.bull.com
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Re: nets: status of sysfs with netns [message #28455 is a reply to message #28348] Tue, 18 March 2008 17:01 Go to previous messageGo to next message
ebiederm is currently offline  ebiederm
Messages: 1354
Registered: February 2006
Senior Member
Pavel Emelyanov <xemul@openvz.org> writes:

> Benjamin Thery wrote:
>> Eric, Pavel,
>> 
>> I haven't followed everything about the sysfs/netns issue recently and I 
>> think I have missed some of its recent developments in the past weeks. 
>> So I'm wondering what is the current status? Is anyone still working on it?
>
> I'm thinking on it, but have no graceful solution :( Sysfs is a big...
> no - HUUUUUUUUUUGE problem.
>
>> As several netns patches for IPv4 and IPv6 have already been merged in 
>> net-2.6.26, it would be great to have the sysfs part also to help people 
>> who want test netns.
>> Right now, it is a pain to boot and test a system with CONFIG_SYSFS=n.
>> 
>> (I know the problem is not trivial and won't be easy to solve. I just 
>> want to be sure it is not forgotten)
>
> It is (unfortunately) not.
>
>> Pavel, I've heard you sent (or have) a patch that prevents sysfs access 
>> from a "child" netns. A patch that can be a good workaround until we 
>> have the full thing ready. I can't find it in mailing lists archives, 
>> can you give some hints about where to find it? :)
>
> Hm. I haven't had plans to do such things actually.
>
>> Thanks a lot.

Sorry guys.  I think my initial reply got lost.

Currently my approach was approved in code review.  The only hold up
seems to be time, and gregkh getting overloaded and dropping the
patches, for the Nth time.

So I need to resend.  I won't for a week or two because I am right in
the middle of moving.

Sorry I thought I had replied to the earlier question of status with
this but is seems that message got lost somewhere in the delivery
process.

Eric
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Re: nets: status of sysfs with netns [message #29379 is a reply to message #28455] Fri, 11 April 2008 15:33 Go to previous message
Daniel Lezcano is currently offline  Daniel Lezcano
Messages: 417
Registered: June 2006
Senior Member
Eric W. Biederman wrote:
> Pavel Emelyanov <xemul@openvz.org> writes:
> 
>> Benjamin Thery wrote:
>>> Eric, Pavel,
>>>
>>> I haven't followed everything about the sysfs/netns issue recently and I 
>>> think I have missed some of its recent developments in the past weeks. 
>>> So I'm wondering what is the current status? Is anyone still working on it?
>> I'm thinking on it, but have no graceful solution :( Sysfs is a big...
>> no - HUUUUUUUUUUGE problem.
>>
>>> As several netns patches for IPv4 and IPv6 have already been merged in 
>>> net-2.6.26, it would be great to have the sysfs part also to help people 
>>> who want test netns.
>>> Right now, it is a pain to boot and test a system with CONFIG_SYSFS=n.
>>>
>>> (I know the problem is not trivial and won't be easy to solve. I just 
>>> want to be sure it is not forgotten)
>> It is (unfortunately) not.
>>
>>> Pavel, I've heard you sent (or have) a patch that prevents sysfs access 
>>> from a "child" netns. A patch that can be a good workaround until we 
>>> have the full thing ready. I can't find it in mailing lists archives, 
>>> can you give some hints about where to find it? :)
>> Hm. I haven't had plans to do such things actually.
>>
>>> Thanks a lot.
> 
> Sorry guys.  I think my initial reply got lost.
> 
> Currently my approach was approved in code review.  The only hold up
> seems to be time, and gregkh getting overloaded and dropping the
> patches, for the Nth time.

Hi Eric,

I tryed to look at your patchset but I was unable to find it. Do you 
have it somewhere available ? I was guessing I could play with it and by 
the way test it a little ;)

Thanks
  -- Daniel













































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