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 <t...@kernel.org>
> > Cc: Daniel Borkmann <dan...@iogearbox.net>
> > Cc: Daniel Wagner <daniel.wag...@bmw-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.


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