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d5b97c01ce
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
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Co-developed-by: Blanco Alcaine Hector <hector.blanco.alcaine@intel.com>
Signed-off-by: Blanco Alcaine Hector <hector.blanco.alcaine@intel.com>
Signed-off-by: Song Yoong Siang <yoong.siang.song@intel.com>
Tested-by: Mor Bar-Gabay <morx.bar.gabay@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
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https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.