netdev - [PATCH bpf-next v6 02/11] bpf: Prepare to reuse get_ctx_arg

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Message-ID: <20250319215358.2287371-3-ameryhung@gmail.com>
Date: Wed, 19 Mar 2025 14:53:49 -0700
From: Amery Hung <ameryhung@...il.com>
To: netdev@...r.kernel.org
Cc: bpf@...r.kernel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	alexei.starovoitov@...il.com,
	martin.lau@...nel.org,
	kuba@...nel.org,
	edumazet@...gle.com,
	xiyou.wangcong@...il.com,
	jhs@...atatu.com,
	sinquersw@...il.com,
	toke@...hat.com,
	juntong.deng@...look.com,
	jiri@...nulli.us,
	stfomichev@...il.com,
	ekarani.silvestre@....ufcg.edu.br,
	yangpeihao@...u.edu.cn,
	yepeilin.cs@...il.com,
	ameryhung@...il.com,
	kernel-team@...a.com
Subject: [PATCH bpf-next v6 02/11] bpf: Prepare to reuse get_ctx_arg_idx

Rename get_ctx_arg_idx to bpf_ctx_arg_idx, and allow others to call it.
No functional change.

Signed-off-by: Amery Hung <ameryhung@...il.com>
Acked-by: Toke Høiland-Jørgensen <toke@...hat.com>
---
 include/linux/btf.h | 1 +
 kernel/bpf/btf.c    | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/linux/btf.h b/include/linux/btf.h
index ebc0c0c9b944..b2983706292f 100644
--- a/include/linux/btf.h
+++ b/include/linux/btf.h
@@ -522,6 +522,7 @@ bool btf_param_match_suffix(const struct btf *btf,
 			    const char *suffix);
 int btf_ctx_arg_offset(const struct btf *btf, const struct btf_type *func_proto,
 		       u32 arg_no);
+u32 btf_ctx_arg_idx(struct btf *btf, const struct btf_type *func_proto, int off);
 
 struct bpf_verifier_log;
 
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 519e3f5e9c10..9a4920828c30 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -6369,8 +6369,8 @@ static bool is_int_ptr(struct btf *btf, const struct btf_type *t)
 	return btf_type_is_int(t);
 }
 
-static u32 get_ctx_arg_idx(struct btf *btf, const struct btf_type *func_proto,
-			   int off)
+u32 btf_ctx_arg_idx(struct btf *btf, const struct btf_type *func_proto,
+		    int off)
 {
 	const struct btf_param *args;
 	const struct btf_type *t;
@@ -6649,7 +6649,7 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type,
 			tname, off);
 		return false;
 	}
-	arg = get_ctx_arg_idx(btf, t, off);
+	arg = btf_ctx_arg_idx(btf, t, off);
 	args = (const struct btf_param *)(t + 1);
 	/* if (t == NULL) Fall back to default BPF prog with
 	 * MAX_BPF_FUNC_REG_ARGS u64 arguments.
-- 
2.47.1