From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ben Pfountz Subject: SFQ flow classifier, works for imq0, not for eth1 Date: Fri, 12 Nov 2010 09:57:34 -0500 Message-ID: <4CDD55DE.50003@vt.edu> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Sender: netfilter-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: netfilter@vger.kernel.org Hey Everyone, Any direction with this problem would be greatly appreciated. For some reason when I add a SFQ flow classifier using tc filter, the sfq qdisc stops forwarding packets. (strangely though, a few packets are forwarded before things stop working) I am working with an openwrt based router, trying to add SFQ flow classifier support to openwrt's qos-scripts. I have simplified the TC commands down to these to try to find the problem. tc qdisc add dev eth1 root handle 1: htb default 7 tc class add dev eth1 parent 1: classid 1:7 htb rate 500mbit ceil 1000mbit prio 3 tc qdisc add dev eth1 parent 1:7 handle 10: sfq perturb 10 tc filter add dev eth1 protocol ip parent 10: handle 2 flow hash keys src,dst divisor 1024 Without the last line, packets flow normally as shown by # tc -s -d qdisc show dev eth1 qdisc htb 1: root refcnt 2 r2q 10 default 7 direct_packets_stat 0 ver 3.17 Sent 856 bytes 11 pkt (dropped 0, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 qdisc sfq 10: parent 1:7 limit 127p quantum 1514b flows 127/1024 perturb 10sec Sent 856 bytes 11 pkt (dropped 0, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 With the last line, I see this tc -s -d qdisc show dev eth1 qdisc htb 1: root refcnt 2 r2q 10 default 7 direct_packets_stat 0 ver 3.17 Sent 5019 bytes 53 pkt (dropped 40, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 qdisc sfq 10: parent 1:7 limit 127p quantum 1514b flows 127/1024 perturb 10sec Sent 5019 bytes 53 pkt (dropped 40, overlimits 0 requeues 0) rate 0bit 0pps backlog 0b 0p requeues 0 I have tried every combination of hash keys and divisor I can think of, but the problem remains. The system is linux 2.6.32.25, iproute 2.6.35, and cls_flow is loaded. Does anyone have any suggestions? What is the TC command to view the SFQ internal queues as described here? http://www.mail-archive.com/netdev@vger.kernel.org/msg60637.html Thanks! Ben