diff options
| author | Roman Gushchin <[email protected]> | 2018-09-28 14:45:43 +0000 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2018-10-01 16:18:32 +0200 |
| commit | b741f1630346defcbc8cc60f1a2bdae8b3b0036f (patch) | |
| tree | c5698184b5398cea8e288276844232d0101b64da /include/uapi/linux | |
| parent | f294b37ec7b24a574884cd157497a3748081c0f0 (diff) | |
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 <[email protected]>
Cc: Daniel Borkmann <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Acked-by: Song Liu <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Diffstat (limited to 'include/uapi/linux')
| -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 { |