On Thu Jun 19 2025, Song Yoong Siang wrote: > Introduce support for a lowest priority wildcard (catch-all) rule in > ethtool's Network Flow Classification (NFC) for the igc driver. The > wildcard rule directs all unmatched network traffic, including traffic not > captured by Receive Side Scaling (RSS), to a specified queue. This > functionality utilizes the Default Queue feature available in I225/I226 > hardware. > > The implementation has been validated on Intel ADL-S systems with two > back-to-back connected I226 network interfaces. > > Testing Procedure: > 1. On the Device Under Test (DUT), verify the initial statistic: > $ ethtool -S enp1s0 | grep rx_q.*packets > rx_queue_0_packets: 0 > rx_queue_1_packets: 0 > rx_queue_2_packets: 0 > rx_queue_3_packets: 0 > > 2. From the Link Partner, send 10 ARP packets: > $ arping -c 10 -I enp170s0 169.254.1.2 > > 3. On the DUT, verify the packet reception on Queue 0: > $ ethtool -S enp1s0 | grep rx_q.*packets > rx_queue_0_packets: 10 > rx_queue_1_packets: 0 > rx_queue_2_packets: 0 > rx_queue_3_packets: 0 > > 4. On the DUT, add a wildcard rule to route all packets to Queue 3: > $ sudo ethtool -N enp1s0 flow-type ether queue 3 > > 5. From the Link Partner, send another 10 ARP packets: > $ arping -c 10 -I enp170s0 169.254.1.2 > > 6. Now, packets are routed to Queue 3 by the wildcard (Default Queue) rule: > $ ethtool -S enp1s0 | grep rx_q.*packets > rx_queue_0_packets: 10 > rx_queue_1_packets: 0 > rx_queue_2_packets: 0 > rx_queue_3_packets: 10 > > 7. On the DUT, add a EtherType rule to route ARP packet to Queue 1: > $ sudo ethtool -N enp1s0 flow-type ether proto 0x0806 queue 1 > > 8. From the Link Partner, send another 10 ARP packets: > $ arping -c 10 -I enp170s0 169.254.1.2 > > 9. Now, packets are routed to Queue 1 by the EtherType rule because it is > higher priority than the wildcard (Default Queue) rule: > $ ethtool -S enp1s0 | grep rx_q.*packets > rx_queue_0_packets: 10 > rx_queue_1_packets: 10 > rx_queue_2_packets: 0 > rx_queue_3_packets: 10 > > 10. On the DUT, delete all the NFC rules: > $ sudo ethtool -N enp1s0 delete 63 > $ sudo ethtool -N enp1s0 delete 64 > > 11. From the Link Partner, send another 10 ARP packets: > $ arping -c 10 -I enp170s0 169.254.1.2 > > 12. Now, packets are routed to Queue 0 because the value of Default Queue > is reset back to 0: > $ ethtool -S enp1s0 | grep rx_q.*packets > rx_queue_0_packets: 20 > rx_queue_1_packets: 10 > rx_queue_2_packets: 0 > rx_queue_3_packets: 10 > > Co-developed-by: Blanco Alcaine Hector <[email protected]> > Signed-off-by: Blanco Alcaine Hector <[email protected]> > Signed-off-by: Song Yoong Siang <[email protected]>
Reviewed-by: Kurt Kanzenbach <[email protected]>
signature.asc
Description: PGP signature
