linux-kernel - [PATCH bpf-next 6/9] bpf, net: tcp: Constify BPF ops

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Message-Id: <20241127-bpf-const-ops-v1-6-a698b8d58680@weissschuh.net>
Date: Wed, 27 Nov 2024 20:15:25 +0100
From: Thomas Weißschuh <linux@...ssschuh.net>
To: "David S. Miller" <davem@...emloft.net>, 
 David Ahern <dsahern@...nel.org>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Simon Horman <horms@...nel.org>, Martin KaFai Lau <martin.lau@...nel.org>, 
 Kui-Feng Lee <thinker.li@...il.com>, Alexei Starovoitov <ast@...nel.org>, 
 Daniel Borkmann <daniel@...earbox.net>, 
 John Fastabend <john.fastabend@...il.com>, 
 Andrii Nakryiko <andrii@...nel.org>, 
 Martin KaFai Lau <martin.lau@...ux.dev>, 
 Eduard Zingerman <eddyz87@...il.com>, Song Liu <song@...nel.org>, 
 Yonghong Song <yonghong.song@...ux.dev>, KP Singh <kpsingh@...nel.org>, 
 Stanislav Fomichev <sdf@...ichev.me>, Hao Luo <haoluo@...gle.com>, 
 Jiri Olsa <jolsa@...nel.org>, Jiri Kosina <jikos@...nel.org>, 
 Benjamin Tissoires <bentiss@...nel.org>, Tejun Heo <tj@...nel.org>, 
 David Vernet <void@...ifault.com>, Ingo Molnar <mingo@...hat.com>, 
 Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>, 
 Vincent Guittot <vincent.guittot@...aro.org>, 
 Dietmar Eggemann <dietmar.eggemann@....com>, 
 Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, 
 Mel Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 bpf@...r.kernel.org, linux-input@...r.kernel.org, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH bpf-next 6/9] bpf, net: tcp: Constify BPF ops

The BPF core now allows the registration of read-only ops tables,
make use of it.

Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 net/ipv4/bpf_tcp_ca.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c
index ce5012f6821d543541b13275aff87bef0abf4677..9b95dcacf3467de69e366e9196c36c4c92f78d75 100644
--- a/net/ipv4/bpf_tcp_ca.c
+++ b/net/ipv4/bpf_tcp_ca.c
@@ -11,7 +11,7 @@
 #include <net/tcp.h>
 #include <net/bpf_sk_storage.h>

-static struct bpf_struct_ops bpf_tcp_congestion_ops;
+static const struct bpf_struct_ops bpf_tcp_congestion_ops;

 static const struct btf_type *tcp_sock_type;
 static u32 tcp_sock_id, sock_id;
@@ -307,7 +307,7 @@ static void __bpf_tcp_ca_release(struct sock *sk)
 {
 }

-static struct tcp_congestion_ops __bpf_ops_tcp_congestion_ops = {
+static const struct tcp_congestion_ops __bpf_ops_tcp_congestion_ops = {
 	.ssthresh = bpf_tcp_ca_ssthresh,
 	.cong_avoid = bpf_tcp_ca_cong_avoid,
 	.set_state = bpf_tcp_ca_set_state,
@@ -323,7 +323,7 @@ static struct tcp_congestion_ops __bpf_ops_tcp_congestion_ops = {
 	.release = __bpf_tcp_ca_release,
 };

-static struct bpf_struct_ops bpf_tcp_congestion_ops = {
+static const struct bpf_struct_ops bpf_tcp_congestion_ops = {
 	.verifier_ops = &bpf_tcp_ca_verifier_ops,
 	.reg = bpf_tcp_ca_reg,
 	.unreg = bpf_tcp_ca_unreg,

-- 
2.47.1