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I don’t see a single parameter of the process ID.

Well yes you don't get it with a parameter you get it with this helper function while in those contexts `bpf_get_current_pid_tgid`.

Edit to provide link: https://elixir.bootlin.com/linux/v4.6/source/samples/bpf/bpf...

Using same bootlin search engine using your link, function nor variable not found.

Furthermore, the process ID is not yet identified at early inbound stage of EBPD. We would be talking about being past the pre-inbound stage, post-table-lookup stage, and specifically just during the input-to-user land stage.

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