We've been developing an in-house L4 load balancer based on XDP and TC for a while. Following Alexei's call for more up-to-date examples of production BPF in the kernel tree [1], Cloudflare is making this available under dual GPL-2.0 or BSD 3-clause terms. The code requires at least v5.3 to function correctly. 1: https://lore.kernel.org/bpf/20200326210719.den5isqxntnoqhmv@ast-mbp/ Lorenz Bauer (1): selftests/bpf: add cls_redirect classifier .../selftests/bpf/prog_tests/cls_redirect.c | 456 +++++++ .../selftests/bpf/progs/test_cls_redirect.c | 1058 +++++++++++++++++ .../selftests/bpf/progs/test_cls_redirect.h | 54 + tools/testing/selftests/bpf/test_progs.h | 7 + 4 files changed, 1575 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/cls_redirect.c create mode 100644 tools/testing/selftests/bpf/progs/test_cls_redirect.c create mode 100644 tools/testing/selftests/bpf/progs/test_cls_redirect.h -- 2.20.1
