Unknown format for p4_device_config error

[Prashanth Iyengar]

Hello,

I am trying figure out the necessary steps needed to write an ONOS app to push a P4 program on to a physical Stratum Tofino switch.

I get the following error while attempting to push the pipeline using netcfg.

INVALID_ARGUMENT: Unknown format for p4_device_config.

I verified that the same P4 program can be pushed to the physical Tofino switch running Stratum using the p4lang/p4runtime-shell successfully.

Probably, there is some mistake in the how the P4 compiler outputs are being packaged in the pipeconf/Pipeconfloader.java.

    private PiPipeconf buildPipeconf() throws P4InfoParserException {

        final URL p4InfoUrl = PipeconfLoader.class.getResource(P4INFO_PATH);
        final URL tofinoBinUrl = PipeconfLoader.class.getResource(TOFINO_BIN_PATH);
        final URL tofinoContextJsonPathUrl = PipeconfLoader.class.getResource(TOFINO_CONTEXT_JSON_PATH);
        final PiPipelineModel pipelineModel = P4InfoParser.parse(p4InfoUrl);

        return DefaultPiPipeconf.builder()
                .withId(PIPECONF_ID)
                .withPipelineModel(pipelineModel)
                .addBehaviour(PiPipelineInterpreter.class, InterpreterImpl.class)
                .addBehaviour(Pipeliner.class, PipelinerImpl.class)
                .addExtension(P4_INFO_TEXT, p4InfoUrl)
                .addExtension(TOFINO_BIN, tofinoBinUrl)
                .addExtension(TOFINO_CONTEXT_JSON, tofinoContextJsonPathUrl)
                .build();
    }
   
Any suggestions or debugging tips would be really helpful.

Please see my previously posted query for more on this - https://groups.google.com/a/onosproject.org/g/onos-dev/c/9VGmfYGqmNk

Thanks,
Prashanth

[Carmelo Cascone]

Hi,

We changed the supported pipeline config format in Stratum some time ago:

https://github.com/stratum/stratum/blob/main/stratum/hal/bin/barefoot/README.pipeline.md

Instead of providing the TOFINO_BIN and TOFINO_CONTEXT_JSON separately, you should provide a single file with extension type RAW_DEVICE_CONFIG.

You can find an example of how to package such pipeconf here:

https://github.com/stratum/fabric-tna/blob/main/src/main/java/org/stratumproject/fabric/tna/PipeconfLoader.java#L157

And how to generate the new pipeline config file for Stratum here:

https://github.com/stratum/fabric-tna/blob/main/p4src/tna/build.sh#L50

Hope it helps

Carmelo

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[Prashanth Iyengar]

Hi Carmelo,

Thank you for your prompt response.

I will follow the instructions that you have mentioned.

Thanks,

Prashanth