| Message ID | 20240406092005.92399-1-andrea.righi@canonical.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | libbpf: API to partially consume items from ringbuffer | expand |
Hello: This series was applied to bpf/bpf-next.git (master) by Andrii Nakryiko <andrii@kernel.org>: On Sat, 6 Apr 2024 11:15:40 +0200 you wrote: > Introduce ring__consume_n() and ring_buffer__consume_n() API to > partially consume items from one (or more) ringbuffer(s). > > This can be useful, for example, to consume just a single item or when > we need to copy multiple items to a limited user-space buffer from the > ringbuffer callback. > > [...] Here is the summary with links: - [v4,1/4] libbpf: Start v1.5 development cycle https://git.kernel.org/bpf/bpf-next/c/5bd2ed658231 - [v4,2/4] libbpf: ringbuf: allow to consume up to a certain amount of items https://git.kernel.org/bpf/bpf-next/c/13e8125a2276 - [v4,3/4] libbpf: Add ring__consume_n / ring_buffer__consume_n https://git.kernel.org/bpf/bpf-next/c/4d22ea94ea33 - [v4,4/4] selftests/bpf: Add tests for ring__consume_n and ring_buffer__consume_n (no matching commit) You are awesome, thank you!
Introduce ring__consume_n() and ring_buffer__consume_n() API to partially consume items from one (or more) ringbuffer(s). This can be useful, for example, to consume just a single item or when we need to copy multiple items to a limited user-space buffer from the ringbuffer callback. Practical example (where this API can be used): https://github.com/sched-ext/scx/blob/b7c06b9ed9f72cad83c31e39e9c4e2cfd8683a55/rust/scx_rustland_core/src/bpf.rs#L217 See also: https://lore.kernel.org/lkml/20240310154726.734289-1-andrea.righi@canonical.com/T/#u v4: - add a selftest to test the new API - open a new 1.5.0 cycle v3: - rename ring__consume_max() -> ring__consume_n() and ring_buffer__consume_max() -> ring_buffer__consume_n() - add new API to a new 1.5.0 cycle - fixed minor nits / comments v2: - introduce a new API instead of changing the callback's retcode behavior Andrea Righi (4): libbpf: Start v1.5 development cycle libbpf: ringbuf: allow to consume up to a certain amount of items libbpf: Add ring__consume_n / ring_buffer__consume_n selftests/bpf: Add tests for ring__consume_n and ring_buffer__consume_n tools/lib/bpf/libbpf.h | 12 +++++ tools/lib/bpf/libbpf.map | 6 +++ tools/lib/bpf/libbpf_version.h | 2 +- tools/lib/bpf/ringbuf.c | 59 ++++++++++++++++++++---- tools/testing/selftests/bpf/prog_tests/ringbuf.c | 8 ++++ 5 files changed, 76 insertions(+), 11 deletions(-)