"TC classifier not found" when using tc filters

[emanuele-f]

Running latest armbian buster on nanopi neo plus2 (https://www.armbian.com/nanopi-neo-plus2).

 

Trying to set up a tc filter results in a "Error: TC classifier not found". The error can be reproduced by running:

 

tc qdisc add dev eth0 root handle 1:0 htb default 10
tc class add dev eth0 parent 1:0 classid 1:10 htb rate 200mbit ceil 200mbit burst 15k
tc qdisc add dev eth0 parent 1:10 sfq perturb 10
tc filter add dev eth0 parent 1:10 protocol all handle 0x310 flow hash keys nfct-src divisor 1024

According to https://stackoverflow.com/questions/61799390/enable-tc-of-iproute2-package-on-yocto, the CONFIG_NET_CLS_U32 is missing from the kernel configuration, verified with:

 

zcat /proc/config.gz | grep NET_CLS_U32
# CONFIG_NET_CLS_U32 is not set

 

The CONFIG_NET_CLS_U32 option is usually present in normal linux distributions, can you add it?

Edited October 23, 2020 by emanuele-f
Add software info

[Igor]

25 minutes ago, emanuele-f said:

in normal linux distributions

Armbian is not lika a normal distribution, but very much a special distro for ARM single board computers dividied into (kernel) families to secure maximum performance which sadly bring way bigger maintaning expenses ... then normal - mee too - linux distribution. Its also a build system first. Like Yocto and Buildroot. A distribution is its side outcome and its supported in best effort manner.  And it is also a base for many other mee-too distros that provides some ARM images.

 

25 minutes ago, emanuele-f said:

can you add it?

Also you can save us some time and do that:
https://docs.armbian.com/Process_Contribute/

Here:
https://github.com/armbian/build/blob/master/config/kernel/linux-sunxi64-current.config

and perhaps also elsewhere:
https://github.com/armbian/build/tree/master/config/kernel

[emanuele-f]

Thanks for your prompt reply. I can see that the kernel module option is present in other families (e.g. https://github.com/armbian/build/blob/master/config/kernel/linux-rockchip64-current.config) and I assume that adding such option does not introduce a performance impact unless it is manually activated by running the "tc filter add.." command.

 

I can try to build the kernel and the image and provide a pull request but it will take some time as it is my first time building armbian.

[Igor]

14 hours ago, emanuele-f said:

I can see that the kernel module option is present in other families

We are to make them identical but since there so much other - more critical - issues, this is left mainly untouched and synched once per year or so.
 

14 hours ago, emanuele-f said:

I assume that adding such option does not introduce a performance impact

 

I would assume the same, yes.

 

14 hours ago, emanuele-f said:

I can try to build the kernel and the image and provide a pull request but it will take some time as it is my first time building armbian.

There is no urgency. Take your time.

[emanuele-f]

Compilation was easy and painless, great work!

 

Please check out https://github.com/armbian/build/pull/2277.