TC Backend

Table of Contents

• • How to use it?
  • Contacts

TC backend aims to generate files for the P4TC implementation in Linux kernel (from 6.3.x version). P4TC is an implementation of the Programming Protocol-independent Packet Processors (P4) that is kernel based, building on top of Linux TC.

For more info on P4TC, Please refer:

• What Is P4TC
• P4TC examples
• P4TC tutorial

The p4c-pna-p4tc compiler accepts the P4-16 programs written for the pna.p4 architecture model.

This backend generates three different outputs as explained below:

• A 'template' file which is a shell script that form template definitions for the different P4 objects (tables, registers, actions etc).
• A 'c' file that has parser and the rest of the software datapath generated in ebpf and need to be compiled into binaries.
• A 'json' introspection file used for control plane.

The backend for TC reuses code from the p4c-ebpf for generating c file.

How to use it?

The sample p4 programs are located in the testdata/p4tc_samples directory.

To generate the 'template' file, 'c' file and 'json' file:

p4c-pna-p4tc simple_exact_example.p4 -o exact.template -c exact.c -i exact.json

Contacts

Sosutha Sethuramapandian sosut.nosp@m.ha.s.nosp@m.ethur.nosp@m.amap.nosp@m.andia.nosp@m.n@in.nosp@m.tel.c.nosp@m.om

Usha Gupta usha..nosp@m.gupt.nosp@m.a@int.nosp@m.el.c.nosp@m.om