In large software projects, eBPF programs need thorough testing to avoid disruptive changes. The `BPF_PROG_RUN` command, invoked via the `bpf()` syscall, facilitates unit testing by returning eBPF program results to user-space. Various eBPF program types are supported, and `libbpf` simplifies the process with the `bpf_prog_test_run_opts` wrapper. Essential fields in `bpf_test_run_opts` for testing XDP programs include `sz`, `data_in`, `data_size_in`, and `repeat`. For detailed code examples, refer to the author's GitHub repository.
23 Impressions