On Wed, Mar 19, 2014 at 10:35:15AM +0100, Daniel Borkmann wrote: > On 03/19/2014 07:58 AM, Alexey Perevalov wrote: > >This simple modification allows iptables to work with INPUT chain > >in combination with cgroup module. It could be useful for counting > >ingress traffic per cgroup with nfacct netfilter module. There > >were no problems to count the egress traffic that way formerly. > > > >It's possible to get classified sk_buff after PREROUTING, due to > >socket lookup being done in early_demux (tcp_v4_early_demux). Also > >it works for udp as well. > > > >Trivial usage example, assuming we're in the same shell every step > >and we have enough permissions: > > > >1) Classic net_cls cgroup initialization: > > > > mkdir /sys/fs/cgroup/net_cls > > mount -t cgroup -o net_cls net_cls /sys/fs/cgroup/net_cls > > > >2) Set up cgroup for interesting application: > > > > mkdir /sys/fs/cgroup/net_cls/wget > > echo 1 > /sys/fs/cgroup/net_cls/wget/net_cls.classid > > echo $BASHPID > /sys/fs/cgroup/net_cls/wget/cgroup.procs > > > >3) Create kernel counters: > > > > nfacct add wget-cgroup-in > > iptables -A INPUT -m cgroup ! --cgroup 1 -m nfacct --nfacct-name wget-cgroup-in > > > > nfacct add wget-cgroup-out > > iptables -A OUTPUT -m cgroup ! --cgroup 1 -m nfacct --nfacct-name wget-cgroup-out > > > >4) Network usage: > > > > wget https://www.kernel.org/pub/linux/kernel/v3.x/testing/linux-3.14-rc6.tar.xz > > > >5) Check results: > > > > nfacct list > > > >Cgroup approach is being used for the DataUsage (counting & blocking > >traffic) feature for Samsung's modification of the Tizen OS. > > > >Signed-off-by: Alexey Perevalov <a.perevalov@xxxxxxxxxxx> > > Acked-by: Daniel Borkmann <dborkman@xxxxxxxxxx> Applied. -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
