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:
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.
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
Sosutha Sethuramapandian [email protected]
Usha Gupta [email protected]