[bpf-next,v5,01/13] bpf: Prepare to reuse get_ctx_arg_idx

Commit Message

Amery Hung March 13, 2025, 7:02 p.m. UTC

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

Signed-off-by: Amery Hung <[e-mail]>
---
 include/linux/btf.h | 1 +
 kernel/bpf/btf.c    | 6 +++---
 2 files changed, 4 insertions(+), 3 deletions(-)

Patch

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.