[Intel-wired-lan] [jkirsher/next-queue PATCH v4 0/6] tc-flower based cloud filters in i40e
Jamal Hadi Salim
jhs at mojatatu.com
Wed Oct 11 12:42:20 UTC 2017
On 17-10-10 08:24 PM, Amritha Nambiar wrote:
> This patch series enables configuring cloud filters in i40e
> using the tc-flower classifier. The classification function
> of the filter is to match a packet to a class. cls_flower is
> extended to offload classid to hardware. The offloaded classid
> is used direct matched packets to a traffic class on the device.
> The approach here is similar to the tc 'prio' qdisc which uses
> the classid for band selection. The ingress qdisc is called ffff:0,
> so traffic classes are ffff:1 to ffff:8 (i40e has max of 8 TCs).
> TC0 is minor number 1, TC1 is minor number 2 etc.
>
> The cloud filters are added for a VSI and are cleaned up when
> the VSI is deleted. The filters that match on L4 ports needs
> enhanced admin queue functions with big buffer support for
> extended fields in cloud filter commands.
>
> Example:
> # tc qdisc add dev eth0 ingress
> # ethtool -K eth0 hw-tc-offload on
>
> Match Dst IPv4,Dst Port and route to TC1:
> # tc filter add dev eth0 protocol ip parent ffff: prio 1 flower\
> dst_ip 192.168.1.1/32 ip_proto udp dst_port 22\
> skip_sw classid ffff:2
>
> # tc filter show dev eth0 parent ffff:
> filter pref 1 flower chain 0
> filter pref 1 flower chain 0 handle 0x1 classid ffff:2
> eth_type ipv4
> ip_proto udp
> dst_ip 192.168.1.1
> dst_port 22
> skip_sw
> in_hw
>
Much much better semantic. Thank you.
Have you tested many filter mapping to the same classid?
cheers,
jamal
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