This patch series adds a new ring__ API to libbpf exposing getters for accessing the individual ringbuffers inside a struct ring_buffer. This is useful for polling individually, getting available data, or similar use cases. The API looks like this, and was roughly proposed by Andrii Nakryiko in another thread: Getting a ring struct: struct ring *ring_buffer__ring(struct ring_buffer *rb, unsigned int idx); Using the ring struct: unsigned long ring__consumer_pos(const struct ring *r); unsigned long ring__producer_pos(const struct ring *r); size_t ring__avail_data_size(const struct ring *r); size_t ring__size(const struct ring *r); int ring__map_fd(const struct ring *r); int ring__consume(struct ring *r); Changes in v2: - Addressed all feedback from Andrii Nakryiko Martin Kelly (14): libbpf: refactor cleanup in ring_buffer__add libbpf: switch rings to array of pointers libbpf: add ring_buffer__ring selftests/bpf: add tests for ring_buffer__ring libbpf: add ring__producer_pos, ring__consumer_pos selftests/bpf: add tests for ring__*_pos libbpf: add ring__avail_data_size selftests/bpf: add tests for ring__avail_data_size libbpf: add ring__size selftests/bpf: add tests for ring__size libbpf: add ring__map_fd selftests/bpf: add tests for ring__map_fd libbpf: add ring__consume selftests/bpf: add tests for ring__consume tools/lib/bpf/libbpf.h | 73 ++++++++++++++++ tools/lib/bpf/libbpf.map | 7 ++ tools/lib/bpf/ringbuf.c | 85 ++++++++++++++++--- .../selftests/bpf/prog_tests/ringbuf.c | 26 ++++++ .../selftests/bpf/prog_tests/ringbuf_multi.c | 15 ++++ 5 files changed, 193 insertions(+), 13 deletions(-) -- 2.34.1
