This set adds bpf_cubic.c example. It was separated from the earlier BPF STRUCT_OPS series. Some highlights since the last post: 1. It is based on EricD recent fixes to the kernel tcp_cubic. [1] 2. The bpf jiffies reading helper is inlined by the verifier. Different from the earlier version, it only reads jiffies alone and does not do usecs/jiffies conversion. 3. The bpf .kconfig map is used to read CONFIG_HZ. [1]: https://patchwork.ozlabs.org/cover/1215066/ v3: - Remove __weak from CONFIG_HZ in patch 3. (Andrii) v2: - Move inlining to fixup_bpf_calls() in patch 1. (Daniel) - It is inlined for 64 BITS_PER_LONG and jit_requested as the map_gen_lookup(). Other cases could be considered together with map_gen_lookup() if needed. - Use usec resolution in bictcp_update() calculation in patch 3. usecs_to_jiffies() is then removed(). (Eric) Martin KaFai Lau (3): bpf: Add BPF_FUNC_jiffies64 bpf: Sync uapi bpf.h to tools/ bpf: tcp: Add bpf_cubic example include/linux/bpf.h | 1 + include/uapi/linux/bpf.h | 9 +- kernel/bpf/core.c | 1 + kernel/bpf/helpers.c | 12 + kernel/bpf/verifier.c | 24 + net/core/filter.c | 2 + tools/include/uapi/linux/bpf.h | 9 +- tools/testing/selftests/bpf/bpf_tcp_helpers.h | 16 + .../selftests/bpf/prog_tests/bpf_tcp_ca.c | 25 + tools/testing/selftests/bpf/progs/bpf_cubic.c | 544 ++++++++++++++++++ 10 files changed, 641 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/bpf/progs/bpf_cubic.c -- 2.17.1
