[PATCH bpf-next v16 13/14] bpf: export btf_ctx_access to modules.

From: thinker.li@gmail.com
To: bpf@vger.kernel.org, ast@kernel.org, martin.lau@linux.dev,
	song@kernel.org, kernel-team@meta.com, andrii@kernel.org,
	drosen@google.com
Cc: sinquersw@gmail.com, kuifeng@meta.com,
	Kui-Feng Lee <thinker.li@gmail.com>
Subject: [PATCH bpf-next v16 13/14] bpf: export btf_ctx_access to modules.
Date: Wed, 17 Jan 2024 17:49:29 -0800	[thread overview]
Message-ID: <20240118014930.1992551-14-thinker.li@gmail.com> (raw)
In-Reply-To: <20240118014930.1992551-1-thinker.li@gmail.com>

From: Kui-Feng Lee <thinker.li@gmail.com>

The module requires the use of btf_ctx_access() to invoke
bpf_tracing_btf_ctx_access() from a module. This function is valuable for
implementing validation functions that ensure proper access to ctx.

Signed-off-by: Kui-Feng Lee <thinker.li@gmail.com>
---
 kernel/bpf/btf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c
index 860b2946de3c..81db591b4a22 100644
--- a/kernel/bpf/btf.c
+++ b/kernel/bpf/btf.c
@@ -6142,6 +6142,7 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type,
 		__btf_name_by_offset(btf, t->name_off));
 	return true;
 }
+EXPORT_SYMBOL_GPL(btf_ctx_access);
 
 enum bpf_struct_walk_result {
 	/* < 0 error */
-- 
2.34.1

