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Re: [PATCH 11/13] Changes to show virtual ids to user [message #13321 is a reply to message #13318]

Thu, 24 May 2007 16:15

xemul
Messages: 248
Registered: November 2005

Senior Member

Eric W. Biederman wrote:
> Pavel Emelianov <xemul@openvz.org> writes:
>
>> This is the largest patch in the set. Make all (I hope)
>> the places where the pid is shown to or get from user
>> operate on the virtual pids.
>>
>> An exception is copy_process - it was in one of the
>> previous patches - and the proc - this will come as a
>> separate patch.
>
>
> This is progress. However you don't currently handle the
> case of sending a signal from one namespace to another or
> passing unix credentials from one namespace to another.

That's true. Sending of signal from parent ns to children
is tricky question. It has many solutions, I wanted to
discuss which one is better:
1. Make an "unused" pid in each namespace and use it when signal
comes from outside. This resembles the way it is done in OpenVZ.
2. Send the signal like it came from the kernel.

> In particular we need to know the pid of the source task
> in the destination namespace.

But the source task is not always visible in dst. In this case
we may use pid, that never exists in the destination, just like
it was kill run from bash by user.

> Eric
>

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[Message index]

		[PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Thu, 24 May 2007 12:32
		[PATCH 1/13] Round up the API By: Pavel Emelianov on Thu, 24 May 2007 12:35
		Re: [PATCH 1/13] Round up the API By: serue on Thu, 24 May 2007 16:09
		Re: [PATCH 1/13] Round up the API By: ebiederm on Thu, 24 May 2007 16:22
		Re: [PATCH 1/13] Round up the API By: Pavel Emelianov on Thu, 24 May 2007 16:31
		Re: [PATCH 1/13] Round up the API By: serue on Thu, 24 May 2007 16:48
		Re: [PATCH 1/13] Round up the API By: Pavel Emelianov on Fri, 25 May 2007 07:00
		Re: [PATCH 1/13] Round up the API By: serue on Fri, 25 May 2007 13:02
		[PATCH 2/13] Small preparations for namespaces By: Pavel Emelianov on Thu, 24 May 2007 12:37
		Re: [PATCH 2/13] Small preparations for namespaces By: serue on Thu, 24 May 2007 16:08
		Re: [PATCH 2/13] Small preparations for namespaces By: Pavel Emelianov on Fri, 25 May 2007 06:58
		Re: [PATCH 2/13] Small preparations for namespaces By: serue on Fri, 25 May 2007 13:01
		Re: [PATCH 2/13] Small preparations for namespaces By: Pavel Emelianov on Fri, 25 May 2007 13:21
		Re: [PATCH 2/13] Small preparations for namespaces By: serue on Fri, 25 May 2007 13:55
		[PATCH 3/13] Introduciton of config option and clone flag By: Pavel Emelianov on Thu, 24 May 2007 12:42
		Re: [PATCH 3/13] Introduciton of config option and clone flag By: ebiederm on Thu, 24 May 2007 15:39
		[PATCH 4/13] Introduce the vpid fields and helpers for getting them By: Pavel Emelianov on Thu, 24 May 2007 12:44
		[PATCH 5/13] Expand the pid/task seeking functions set By: Pavel Emelianov on Thu, 24 May 2007 12:46
		Re: [PATCH 5/13] Expand the pid/task seeking functions set By: Dave Hansen on Thu, 24 May 2007 17:11
		Re: [PATCH 5/13] Expand the pid/task seeking functions set By: Pavel Emelianov on Fri, 25 May 2007 07:08
		Re: [PATCH 5/13] Expand the pid/task seeking functions set By: Sukadev Bhattiprolu on Fri, 25 May 2007 23:36
		[PATCH 6/13] Pid allocation/freeing procedures By: Pavel Emelianov on Thu, 24 May 2007 12:49
		[PATCH 7/13] Set virtual pids for a newly cloned task By: Pavel Emelianov on Thu, 24 May 2007 12:53
		[PATCH 8/13] The namespace cloning By: Pavel Emelianov on Thu, 24 May 2007 12:57
		[PATCH 9/13] Make proc be able to have multiple super blocks By: Pavel Emelianov on Thu, 24 May 2007 13:01
		[PATCH 10/13] Make proc draw pids from appropriate namespace By: Pavel Emelianov on Thu, 24 May 2007 13:04
		[PATCH 11/13] Changes to show virtual ids to user By: Pavel Emelianov on Thu, 24 May 2007 13:06
		Re: [PATCH 11/13] Changes to show virtual ids to user By: ebiederm on Thu, 24 May 2007 16:05
		Re: [PATCH 11/13] Changes to show virtual ids to user By: xemul on Thu, 24 May 2007 16:15
		Re: [PATCH 11/13] Changes to show virtual ids to user By: ebiederm on Thu, 24 May 2007 16:33
		Re: [PATCH 11/13] Changes to show virtual ids to user By: Pavel Emelianov on Fri, 25 May 2007 06:33
		Re: [PATCH 11/13] Changes to show virtual ids to user By: ebiederm on Fri, 25 May 2007 15:48
		Re: [PATCH 11/13] Changes to show virtual ids to user By: Cedric Le Goater on Tue, 29 May 2007 12:32
		Re: [PATCH 11/13] Changes to show virtual ids to user By: Pavel Emelianov on Thu, 31 May 2007 07:57
		Re: [PATCH 11/13] Changes to show virtual ids to user By: Pavel Emelianov on Thu, 31 May 2007 08:00
		Re: [PATCH 11/13] Changes to show virtual ids to user By: ebiederm on Thu, 31 May 2007 11:26
		Re: [PATCH 11/13] Changes to show virtual ids to user By: Pavel Emelianov on Thu, 31 May 2007 11:46
		Re: [PATCH 11/13] Changes to show virtual ids to user By: ebiederm on Thu, 31 May 2007 13:41
		[PATCH 12/13] Show appropriate pids in proc By: Pavel Emelianov on Thu, 24 May 2007 13:08
		[PATCH 13/13] Make all proc entres accessible in a namespace By: Pavel Emelianov on Thu, 24 May 2007 13:13
		Instructions of how to make testing easy By: Pavel Emelianov on Thu, 24 May 2007 13:19
		Re: Instructions of how to make testing easy By: Pavel Emelianov on Thu, 24 May 2007 16:16
		Re: Instructions of how to make testing easy By: Cedric Le Goater on Thu, 24 May 2007 14:55
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: serue on Thu, 24 May 2007 15:09
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: xemul on Thu, 24 May 2007 16:11
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: serue on Thu, 24 May 2007 16:59
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: ebiederm on Thu, 24 May 2007 18:56
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: serue on Thu, 24 May 2007 19:10
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Fri, 25 May 2007 07:08
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: serue on Fri, 25 May 2007 13:25
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Fri, 25 May 2007 13:53
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: serue on Fri, 25 May 2007 14:25
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Mon, 28 May 2007 07:48
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: ebiederm on Tue, 29 May 2007 04:30
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Tue, 29 May 2007 07:47
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: ebiederm on Tue, 29 May 2007 12:36
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Fri, 25 May 2007 07:06
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: ebiederm on Fri, 25 May 2007 14:55
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: ebiederm on Thu, 24 May 2007 16:00
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: serue on Thu, 24 May 2007 16:20
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Fri, 25 May 2007 06:29
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: serue on Fri, 25 May 2007 13:29
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Thu, 24 May 2007 16:26
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: ebiederm on Thu, 24 May 2007 19:18
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Fri, 25 May 2007 07:15
		Re: Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: dev on Mon, 28 May 2007 11:50
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: ebiederm on Tue, 29 May 2007 13:07
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Daniel Lezcano on Thu, 24 May 2007 16:41
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Pavel Emelianov on Fri, 25 May 2007 07:26
		Re: [PATCH 0/13] Pid namespaces (OpenVZ view) By: Daniel Lezcano on Fri, 25 May 2007 08:30

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