linux-kernel - [PATCH bpf-next 1/3] bpf: xdp: Register generic_kfunc

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Message-ID: <d07d4614b81ca6aada44fcb89bb6b618fb66e4ca.1702594357.git.dxu@dxuuu.xyz>
Date: Thu, 14 Dec 2023 15:56:25 -0700
From: Daniel Xu <dxu@...uu.xyz>
To: hawk@...nel.org,
	ast@...nel.org,
	daniel@...earbox.net,
	kuba@...nel.org,
	john.fastabend@...il.com,
	andrii@...nel.org,
	davem@...emloft.net,
	memxor@...il.com
Cc: martin.lau@...ux.dev,
	song@...nel.org,
	yonghong.song@...ux.dev,
	kpsingh@...nel.org,
	sdf@...gle.com,
	haoluo@...gle.com,
	jolsa@...nel.org,
	bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH bpf-next 1/3] bpf: xdp: Register generic_kfunc_set with XDP programs

Registering generic_kfunc_set with XDP programs enables some of the
newer BPF features inside XDP -- namely tree based data structures and
BPF exceptions.

The current motivation for this commit is to enable assertions inside
XDP bpf progs. Assertions are a standard and useful tool to encode
intent.

Signed-off-by: Daniel Xu <dxu@...uu.xyz>
---
 kernel/bpf/helpers.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index b3be5742d6f1..b0b485126a76 100644
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -2630,6 +2630,7 @@ static int __init kfunc_init(void)
 
 	ret = register_btf_kfunc_id_set(BPF_PROG_TYPE_TRACING, &generic_kfunc_set);
 	ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_SCHED_CLS, &generic_kfunc_set);
+	ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_XDP, &generic_kfunc_set);
 	ret = ret ?: register_btf_kfunc_id_set(BPF_PROG_TYPE_STRUCT_OPS, &generic_kfunc_set);
 	ret = ret ?: register_btf_id_dtor_kfuncs(generic_dtors,
 						  ARRAY_SIZE(generic_dtors),
-- 
2.42.1