linux-kernel - [PATCH bpf-next 0/3] allow bpf_map_sum_elem

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Message-Id: <20230714142100.42265-1-aspsk@isovalent.com>
Date:   Fri, 14 Jul 2023 14:20:57 +0000
From:   Anton Protopopov <aspsk@...valent.com>
To:     Martin KaFai Lau <martin.lau@...ux.dev>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Mykola Lysenko <mykolal@...com>, Shuah Khan <shuah@...nel.org>,
        Hou Tao <houtao1@...wei.com>, Joe Stringer <joe@...valent.com>,
        Anton Protopopov <aspsk@...valent.com>, bpf@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH bpf-next 0/3] allow bpf_map_sum_elem_count for all program types

This short series is a follow up to the recent series [1] which added
per-cpu insert/delete statistics for maps. The bpf_map_sum_elem_count
kfunc presented in the original series was only available to tracing
programs, so let's make it available to all.

The first patch allows to treat CONST_PTR_TO_MAP as trusted pointers
from kfunc's point of view.

The second patch just adds const to the map argument of the
bpf_map_sum_elem_count kfunc.

The third patch registers the bpf_map_sum_elem_count for all programs,
and patches selftests correspondingly.

Anton Protopopov (3):
  bpf: consider CONST_PTR_TO_MAP as trusted pointer to struct bpf_map
  bpf: make an argument const in the bpf_map_sum_elem_count kfunc
  bpf: allow any program to use the bpf_map_sum_elem_count kfunc

 include/linux/btf_ids.h                          | 1 +
 kernel/bpf/map_iter.c                            | 7 +++----
 kernel/bpf/verifier.c                            | 5 ++++-
 tools/testing/selftests/bpf/progs/map_ptr_kern.c | 5 +++++
 4 files changed, 13 insertions(+), 5 deletions(-)

-- 
2.34.1