[LARTC] Strange behavior deleting filters

[Patrick McHardy]

Andre Correa wrote:

>
> Hi list, I'm playing with tc and found a strange behavior when I try 
> to delete filters. For example, this simple scenario:
>
> tc qdisc add dev eth1 root handle 1: htb default 100
> tc class add dev eth1 parent 1: classid 1:1 htb rate 128Kbit
> tc class add dev eth1 parent 1: classid 1:2 htb rate 258Kbit
> tc class add dev eth1 parent 1: classid 1:100 htb rate 32Kbit
> tc filter add dev eth1 parent 1: protocol ip prio 1 u32 match ip src 
> 10.10.10.20 match ip dst 63.63.63.63 flowid 1:1
> tc filter add dev eth1 parent 1: protocol ip prio 1 u32 match ip src 
> 10.10.10.20 flowid 1:2
>
> works just fine, but when I try to delete oen of the filters with 
> something like this:
>
> tc filter del dev eth1 parent 1: protocol ip prio 1 u32 match ip src 
> 10.10.10.20 flowid 1:2
>
> both filters are deleted.

The kernel only regards priorities when deleting a filter without
giving a handle. Use the handle if you want to delete a specific filter.

Regards,
Patricky