From: Florian Westphal <fw@strlen.de>
To: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Florian Westphal <fw@strlen.de>,
Shmulik Ladkani <shmulik.ladkani@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
WANG Cong <xiyou.wangcong@gmail.com>,
Eric Dumazet <edumazet@google.com>,
netdev@vger.kernel.org, Daniel Borkmann <daniel@iogearbox.net>
Subject: Re: [PATCH net-next 4/4] net/sched: act_mirred: Implement ingress actions
Date: Mon, 26 Sep 2016 03:35:04 +0200 [thread overview]
Message-ID: <20160926013504.GA1959@breakpoint.cc> (raw)
In-Reply-To: <54535aa0-cafd-86ec-1f6c-64c974a5eed6@mojatatu.com>
Jamal Hadi Salim <jhs@mojatatu.com> wrote:
> On 16-09-25 02:31 PM, Florian Westphal wrote:
> >Shmulik Ladkani <shmulik.ladkani@gmail.com> wrote:
> >>We can later address any loop-detection improvements in mirred.
> >>WDYT?
> >
> >You can address this after fixing infamous spinlock recursion hard
> >lockup (which has existed forever):
> >
> >tc qdisc add dev eth0 root handle 1: prio
> >tc filter add dev eth0 parent 1: protocol ip u32 match u32 0 0 flowid
> >1:2 action mirred egress redirect dev eth0
> >
> >(only do this on toy vm)
> >
>
> Realize didnt respond to this. Seems very simple to fix:
> if skb->dev->ifindex and m->tcfm_dev->ifindex are the
> same, then you can drop the packet.
Yes, but I think we get same issue when we deal with stacked
interfaces, and redirect is to e.g. vlan on top of physical device.
And we have such loops even without tc, for instance when placing
both veth ends in same bridge :-(
next prev parent reply other threads:[~2016-09-26 1:35 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-22 13:21 [PATCH net-next 0/4] act_mirred: Ingress actions support Shmulik Ladkani
2016-09-22 13:21 ` [PATCH net-next 1/4] net/sched: act_mirred: Rename tcfm_ok_push to tcfm_mac_header_xmit Shmulik Ladkani
2016-09-27 10:30 ` Daniel Borkmann
2016-09-27 18:24 ` Shmulik Ladkani
2016-09-22 13:21 ` [PATCH net-next 2/4] net/sched: act_mirred: Refactor detection whether dev needs xmit at mac header Shmulik Ladkani
2016-09-22 13:21 ` [PATCH net-next 3/4] net/sched: tc_mirred: Rename public predicates 'is_tcf_mirred_redirect' and 'is_tcf_mirred_mirror' Shmulik Ladkani
2016-09-22 13:21 ` [PATCH net-next 4/4] net/sched: act_mirred: Implement ingress actions Shmulik Ladkani
2016-09-22 14:54 ` Eric Dumazet
2016-09-22 18:27 ` Shmulik Ladkani
2016-09-22 18:42 ` Eric Dumazet
2016-09-22 23:40 ` Jamal Hadi Salim
2016-09-23 5:11 ` Shmulik Ladkani
2016-09-23 12:48 ` Jamal Hadi Salim
2016-09-23 15:40 ` Shmulik Ladkani
2016-09-25 0:20 ` Cong Wang
2016-09-25 13:05 ` Jamal Hadi Salim
2016-09-25 16:26 ` Daniel Borkmann
2016-09-25 18:33 ` Florian Westphal
2016-09-25 23:47 ` Jamal Hadi Salim
2016-09-25 23:31 ` Jamal Hadi Salim
2016-09-25 17:33 ` Shmulik Ladkani
2016-09-25 18:31 ` Florian Westphal
2016-09-26 1:15 ` Jamal Hadi Salim
2016-09-26 1:35 ` Florian Westphal [this message]
2016-09-26 1:40 ` Jamal Hadi Salim
2016-09-26 14:43 ` Hannes Frederic Sowa
2016-09-26 14:53 ` Daniel Borkmann
2016-09-26 15:12 ` Hannes Frederic Sowa
2016-09-26 15:53 ` Daniel Borkmann
2016-09-26 15:26 ` Shmulik Ladkani
2016-09-25 23:45 ` Jamal Hadi Salim
2016-09-25 0:07 ` Cong Wang
2016-09-25 13:39 ` Jamal Hadi Salim
2016-09-26 4:55 ` Cong Wang
2016-09-25 17:59 ` Shmulik Ladkani
2016-09-26 4:56 ` Cong Wang
2016-09-24 23:50 ` Cong Wang
2016-09-27 5:56 ` David Miller
2016-09-27 8:07 ` Shmulik Ladkani
2016-09-27 10:39 ` Daniel Borkmann
2016-09-27 13:44 ` David Miller
2016-09-27 14:18 ` Shmulik Ladkani
2016-09-27 14:47 ` Daniel Borkmann
2016-09-27 14:06 ` Jamal Hadi Salim
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