linux-kernel - Re: [PATCH 7/9] sock, cgroup: add sock->sk

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Message-ID: <56533675.2070603@bmw-carit.de>
Date:	Mon, 23 Nov 2015 16:53:25 +0100
From:	Daniel Wagner <daniel.wagner@...-carit.de>
To:	Tejun Heo <tj@...nel.org>
CC:	<davem@...emloft.net>, <pablo@...filter.org>, <kaber@...sh.net>,
	<kadlec@...ckhole.kfki.hu>, <daniel@...earbox.net>,
	<nhorman@...driver.com>, <lizefan@...wei.com>,
	<hannes@...xchg.org>, <netdev@...r.kernel.org>,
	<netfilter-devel@...r.kernel.org>, <coreteam@...filter.org>,
	<cgroups@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<kernel-team@...com>, <ninasc@...com>
Subject: Re: [PATCH 7/9] sock, cgroup: add sock->sk_cgroup

On 11/23/2015 04:48 PM, Tejun Heo wrote:
> On Mon, Nov 23, 2015 at 02:02:03PM +0100, Daniel Wagner wrote:
>> On 11/21/2015 05:13 PM, Tejun Heo wrote:
>>> Signed-off-by: Tejun Heo <tj@...nel.org>
>>> Cc: Daniel Borkmann <daniel@...earbox.net>
>>> Cc: Daniel Wagner <daniel.wagner@...-carit.de>
>>
>> I did a quick test and for new connection the cgroup2 match worked as
>> expected. For an existing connection I wasn't able to trigger the match.
>>
>> It is quite likely I do something wrong:
>>
>> 	ssh into the box
>> 	# mkdir /sys/fs/cgroup/test
>> 	# echo $$ > /sys/fs/cgroup/test/cgroup.procs
>> 	# echo $PPID > /sys/fs/cgroup/test/cgroup.procs
>> 	# iptables -A OUTPUT -m cgroup --path test
>>
>> Should I see matches with the existing ssh session?
> 
> Socket is associated with the creating cgroup and stays associated
> with that cgroup until it's released.  Migrating the process doesn't
> change the ownership of the sockets it has created.  This is in line
> with how other stateful resources such as memory are handled in
> cgroup2 hierarchy.

Thanks for the explanation. Looks good to me:

Tested-by: Daniel Wagner <daniel.wagner@...-carit.de>
Acked-by: Daniel Wagner <daniel.wagner@...-carit.de>

Thanks,
Daniel
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