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| author | Roman Gushchin | 2018-09-28 16:45:43 +0200 |
|---|---|---|
| committer | Daniel Borkmann | 2018-10-01 16:18:32 +0200 |
| commit | b741f1630346defcbc8cc60f1a2bdae8b3b0036f (patch) | |
| tree | c5698184b5398cea8e288276844232d0101b64da /include/uapi/linux/bpf.h | |
| parent | bpf: rework cgroup storage pointer passing (diff) | |
| download | kernel-qcow2-linux-b741f1630346defcbc8cc60f1a2bdae8b3b0036f.tar.gz kernel-qcow2-linux-b741f1630346defcbc8cc60f1a2bdae8b3b0036f.tar.xz kernel-qcow2-linux-b741f1630346defcbc8cc60f1a2bdae8b3b0036f.zip | |
bpf: introduce per-cpu cgroup local storage
This commit introduced per-cpu cgroup local storage.
Per-cpu cgroup local storage is very similar to simple cgroup storage
(let's call it shared), except all the data is per-cpu.
The main goal of per-cpu variant is to implement super fast
counters (e.g. packet counters), which don't require neither
lookups, neither atomic operations.
>From userspace's point of view, accessing a per-cpu cgroup storage
is similar to other per-cpu map types (e.g. per-cpu hashmaps and
arrays).
Writing to a per-cpu cgroup storage is not atomic, but is performed
by copying longs, so some minimal atomicity is here, exactly
as with other per-cpu maps.
Signed-off-by: Roman Gushchin <guro@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'include/uapi/linux/bpf.h')
| -rw-r--r-- | include/uapi/linux/bpf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index aa5ccd2385ed..e2070d819e04 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -127,6 +127,7 @@ enum bpf_map_type { BPF_MAP_TYPE_SOCKHASH, BPF_MAP_TYPE_CGROUP_STORAGE, BPF_MAP_TYPE_REUSEPORT_SOCKARRAY, + BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE, }; enum bpf_prog_type { |