bpf: rework cgroup storage pointer passing
authorRoman Gushchin <guro@fb.com>
Fri, 28 Sep 2018 14:45:40 +0000 (14:45 +0000)
committerDaniel Borkmann <daniel@iogearbox.net>
Mon, 1 Oct 2018 14:18:32 +0000 (16:18 +0200)
commitf294b37ec7b24a574884cd157497a3748081c0f0
treefb5bdf6cf4a5ff61b7a5f84274ae82c123aac7a9
parent8bad74f9840f87661f20ced3dc80c84ab4fd55a1
bpf: rework cgroup storage pointer passing

To simplify the following introduction of per-cpu cgroup storage,
let's rework a bit a mechanism of passing a pointer to a cgroup
storage into the bpf_get_local_storage(). Let's save a pointer
to the corresponding bpf_cgroup_storage structure, instead of
a pointer to the actual buffer.

It will help us to handle per-cpu storage later, which has
a different way of accessing to the actual data.

Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
include/linux/bpf-cgroup.h
kernel/bpf/helpers.c
kernel/bpf/local_storage.c