Re: filter on prio qdisc fails

Linux Advanced Routing and Traffic Control

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On Thu, Jul 4, 2013 at 4:12 AM, Andy Furniss <adf.lists@xxxxxxxxx> wrote:
> Anand Raj Manickam wrote:
>>
>> Hi  ,
>> I m attaching a the prio qdisc  and filter to veth device , but the
>> packet does not hit the filter , but hits the qdisc and class .
>>
>> Following is my config :
>>
>> tc qdisc add dev veth0 root handle 1: prio
>>
>> tc qdisc add dev veth0 parent 1:2 sfq perturb 16 ( NOT sure if this is
>> needed)
>>
>> tc filter add dev veth0 parent 1: protocol ip prio 2 u32 match ip
>> dport 80 0xffff flowid 1:2
>>
>>
>> I m generating a packet for dport 80 ,
>>
>> #tc -s -r qdisc show dev veth0
>> qdisc prio 1: root refcnt 2 bands 3 priomap  1 2 2 2 1 2 0 0 1 1 1 1 1 1 1
>> 1
>>   Sent 648 bytes 5 pkt (dropped 0, overlimits 0 requeues 0)
>>   backlog 0b 0p requeues 0
>>
>> qdisc sfq 8002: parent 1:2 limit 127p quantum 1514b perturb 16sec
>>   Sent 270 bytes 5 pkt (dropped 0, overlimits 0 requeues 0)
>>   backlog 0b 0p requeues 0
>>
>> #tc -s -r class show dev veth0
>> class prio 1:1 parent 1:
>>   Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>>   backlog 0b 0p requeues 0
>> class prio 1:2 parent 1: leaf 8002:
>>   Sent 270 bytes 5 pkt (dropped 0, overlimits 0 requeues 0)
>>   backlog 0b 0p requeues 0
>> class prio 1:3 parent 1:
>>   Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>>   backlog 0b 0p requeues 0
>>
>> #tc -s -r filter show dev veth0
>> filter parent 1: protocol ip pref 2 u32
>> filter parent 1: protocol ip pref 2 u32 fh 800:[80000000]  ht divisor 1
>> filter parent 1: protocol ip pref 2 u32 fh 800::800[80000800]  order
>> 2048 key ht 800 bkt 0 flowid 1:2  (rule hit 0 success 0)
>>    match 00000050/0000ffff at 20 (success 0 )
>>
>>
>> Is there something missing in the config which disallows the packet to
>> hit the Filter ? I did try this without the sfq class , but directly
>> attaching the filter to qdisc.
>
>
> I guess something strange is happening because of veth - using exactly your
> commands work for me on eth.
>
> I suppose you could also test on a real nic just to see if that works - I
> know nothing about veths.
 You are right , they work fine on physical nic .
 Any idea on how to fix this on veth or whom should i write on this ?


>
>
>
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