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From: "Gaul, Maximilian" <maximilian.gaul@hm.edu>
To: Xdp <xdp-newbies@vger.kernel.org>
Subject: Intel X520 looses ethtool flow-type rule the moment a BPF / XDP program is loaded
Date: Fri, 5 Jun 2020 11:17:33 +0000	[thread overview]
Message-ID: <a5741e0f3b90422f8c53a8bd54f06d8a@hm.edu> (raw)

Hello,

I have an Intel X520 10Gbit/s NIC with driver:

		$ sudo ethtool -i eth5
		driver: ixgbe
		version: 5.7.1
		firmware-version: 0x80000827, 16.5.19
		expansion-rom-version: 
		bus-info: 0000:04:00.1
		supports-statistics: yes
		supports-test: yes
		supports-eeprom-access: yes
		supports-register-dump: yes
		supports-priv-flags: yes

and Kernel:

		$ uname -a
		Linux 5.6.0-2-amd64

I tried this tutorial before hand: https://software.intel.com/content/www/us/en/develop/articles/setting-up-intel-ethernet-flow-director.html

Unfortunately I am experiencing some strange behavior in combination with AF_XDP.

For example, I am adding an ethtool flow-type rule like this:

		$ sudo ethtool -N eth5 flow-type udp4 dst-ip 239.0.1.1 dst-port 5500 action 0
		Added rule with ID 4093

Checking it is there:

		$ sudo ethtool -n eth5
		16 RX rings available
		Total 1 rules

		Filter: 4093
				Rule Type: UDP over IPv4
				Src IP addr: 0.0.0.0 mask: 255.255.255.255
				Dest IP addr: 239.0.1.1 mask: 0.0.0.0
				TOS: 0x0 mask: 0xff
				Src port: 0 mask: 0xffff
				Dest port: 5500 mask: 0x0
				VLAN EtherType: 0x0 mask: 0xffff
				VLAN: 0x0 mask: 0xffff
				User-defined: 0x0 mask: 0xffffffffffffffff
				Action: Direct to queue 0

After that I am launching my AF_XDP program which firsts loads a compiled BPF-object file into the kernel (without any errors).
I am checking ethtool again:

		$ sudo ethtool -n eth5
		16 RX rings available
		Total 0 rules

Any ideas why that is? I am not saying that my program is bug-free but it worked fine in combination with Mellannox ConnectX5 and Broadcom 1Gbit/s NIC (without zcopy on the broadcom though).

Thank you

Max

next             reply	other threads:[~2020-06-05 11:17 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-05 11:17 Gaul, Maximilian [this message]
2020-06-05 11:57 ` Intel X520 looses ethtool flow-type rule the moment a BPF / XDP program is loaded Magnus Karlsson
2020-06-05 12:05   ` AW: " Gaul, Maximilian
2020-06-05 12:15     ` Magnus Karlsson
2020-06-05 12:25       ` AW: " Gaul, Maximilian
2020-06-05 13:11         ` Magnus Karlsson

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