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Date:   Sun, 14 Mar 2021 11:11:00 +0000
To:     "David S. Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>
From:   Alexander Lobakin <alobakin@pm.me>
Cc:     Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <kafai@fb.com>,
        Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
        John Fastabend <john.fastabend@gmail.com>,
        KP Singh <kpsingh@kernel.org>,
        Jonathan Lemon <jonathan.lemon@gmail.com>,
        Alexander Lobakin <alobakin@pm.me>,
        Eric Dumazet <edumazet@google.com>,
        Willem de Bruijn <willemb@google.com>,
        Kevin Hao <haokexin@gmail.com>,
        Pablo Neira Ayuso <pablo@netfilter.org>,
        Jakub Sitnicki <jakub@cloudflare.com>,
        Marco Elver <elver@google.com>,
        Dexuan Cui <decui@microsoft.com>,
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        Ariel Levkovich <lariel@mellanox.com>,
        Wang Qing <wangqing@vivo.com>,
        Davide Caratti <dcaratti@redhat.com>,
        Guillaume Nault <gnault@redhat.com>,
        Eran Ben Elisha <eranbe@nvidia.com>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
        Kirill Tkhai <ktkhai@virtuozzo.com>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        bpf@vger.kernel.org
Reply-To: Alexander Lobakin <alobakin@pm.me>
Subject: [PATCH v3 net-next 1/6] flow_dissector: constify bpf_flow_dissector's data pointers
Message-ID: <20210314111027.7657-2-alobakin@pm.me>
In-Reply-To: <20210314111027.7657-1-alobakin@pm.me>
References: <20210314111027.7657-1-alobakin@pm.me>
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Precedence: bulk

BPF Flow dissection programs are read-only and don't touch input
buffers.
Mark 'data' and 'data_end' in struct bpf_flow_dissector as const
in preparation for global input constifying.

Signed-off-by: Alexander Lobakin <alobakin@pm.me>
---
 include/net/flow_dissector.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h
index cc10b10dc3a1..bf00e71816ed 100644
--- a/include/net/flow_dissector.h
+++ b/include/net/flow_dissector.h
@@ -368,8 +368,8 @@ static inline void *skb_flow_dissector_target(struct fl=
ow_dissector *flow_dissec
 struct bpf_flow_dissector {
 =09struct bpf_flow_keys=09*flow_keys;
 =09const struct sk_buff=09*skb;
-=09void=09=09=09*data;
-=09void=09=09=09*data_end;
+=09const void=09=09*data;
+=09const void=09=09*data_end;
 };

 static inline void
--
2.30.2