linux-kernel - [PATCH bpf-next v5 6/9] bpf: Add syscall common attributes support for btf

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Message-ID: <20260112145616.44195-7-leon.hwang@linux.dev>
Date: Mon, 12 Jan 2026 22:56:13 +0800
From: Leon Hwang <leon.hwang@...ux.dev>
To: bpf@...r.kernel.org
Cc: 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>,
	Shuah Khan <shuah@...nel.org>,
	Christian Brauner <brauner@...nel.org>,
	Seth Forshee <sforshee@...nel.org>,
	Yuichiro Tsuji <yuichtsu@...zon.com>,
	Andrey Albershteyn <aalbersh@...hat.com>,
	Leon Hwang <leon.hwang@...ux.dev>,
	Willem de Bruijn <willemb@...gle.com>,
	Jason Xing <kerneljasonxing@...il.com>,
	Tao Chen <chen.dylane@...ux.dev>,
	Mykyta Yatsenko <yatsenko@...a.com>,
	Kumar Kartikeya Dwivedi <memxor@...il.com>,
	Anton Protopopov <a.s.protopopov@...il.com>,
	Amery Hung <ameryhung@...il.com>,
	Rong Tao <rongtao@...tc.cn>,
	linux-kernel@...r.kernel.org,
	linux-api@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	kernel-patches-bot@...com
Subject: [PATCH bpf-next v5 6/9] bpf: Add syscall common attributes support for btf_load

Since bpf_log_attr_init() now supports struct bpf_common_attr, pass the
common attributes to it to enable syscall common attributes support for
BPF_BTF_LOAD.

Signed-off-by: Leon Hwang <leon.hwang@...ux.dev>
---
 include/linux/bpf_verifier.h | 3 ++-
 kernel/bpf/log.c             | 5 +++--
 kernel/bpf/syscall.c         | 8 +++++---
 3 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h
index 44dd60de1966..9022e4f515f9 100644
--- a/include/linux/bpf_verifier.h
+++ b/include/linux/bpf_verifier.h
@@ -642,7 +642,8 @@ struct bpf_log_attr {
 
 int bpf_prog_load_log_attr_init(struct bpf_log_attr *log_attr, struct bpf_attrs *attrs,
 				struct bpf_attrs *attrs_common);
-int bpf_btf_load_log_attr_init(struct bpf_log_attr *log_attr, struct bpf_attrs *attrs);
+int bpf_btf_load_log_attr_init(struct bpf_log_attr *log_attr, struct bpf_attrs *attrs,
+			       struct bpf_attrs *attrs_common);
 int bpf_log_attr_finalize(struct bpf_log_attr *log_attr, struct bpf_verifier_log *log);
 
 #define BPF_MAX_SUBPROGS 256
diff --git a/kernel/bpf/log.c b/kernel/bpf/log.c
index 96df089a2c89..0dba014ca055 100644
--- a/kernel/bpf/log.c
+++ b/kernel/bpf/log.c
@@ -902,13 +902,14 @@ int bpf_prog_load_log_attr_init(struct bpf_log_attr *log_attr, struct bpf_attrs
 				 offsetof(union bpf_attr, log_true_size), attrs_common);
 }
 
-int bpf_btf_load_log_attr_init(struct bpf_log_attr *log_attr, struct bpf_attrs *attrs)
+int bpf_btf_load_log_attr_init(struct bpf_log_attr *log_attr, struct bpf_attrs *attrs,
+			       struct bpf_attrs *attrs_common)
 {
 	const union bpf_attr *attr = attrs->attr;
 
 	return bpf_log_attr_init(log_attr, attrs, attr->btf_log_buf, attr->btf_log_size,
 				 attr->btf_log_level, offsetof(union bpf_attr, btf_log_true_size),
-				 NULL);
+				 attrs_common);
 }
 
 int bpf_log_attr_finalize(struct bpf_log_attr *log_attr, struct bpf_verifier_log *log)
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 8382fafc8d17..d0440e640e40 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -5433,7 +5433,8 @@ static int bpf_obj_get_info_by_fd(const union bpf_attr *attr,
 
 #define BPF_BTF_LOAD_LAST_FIELD btf_token_fd
 
-static int bpf_btf_load(const union bpf_attr *attr, bpfptr_t uattr, __u32 uattr_size)
+static int bpf_btf_load(const union bpf_attr *attr, bpfptr_t uattr, __u32 uattr_size,
+			struct bpf_attrs *common_attrs)
 {
 	struct bpf_token *token = NULL;
 	struct bpf_log_attr log_attr;
@@ -5447,7 +5448,7 @@ static int bpf_btf_load(const union bpf_attr *attr, bpfptr_t uattr, __u32 uattr_
 		return -EINVAL;
 
 	bpf_attrs_init(&attrs, attr, uattr, uattr_size);
-	err = bpf_btf_load_log_attr_init(&log_attr, &attrs);
+	err = bpf_btf_load_log_attr_init(&log_attr, &attrs, common_attrs);
 	if (err)
 		return err;
 
@@ -6281,7 +6282,8 @@ static int __sys_bpf(enum bpf_cmd cmd, bpfptr_t uattr, unsigned int size,
 		err = bpf_raw_tracepoint_open(&attr);
 		break;
 	case BPF_BTF_LOAD:
-		err = bpf_btf_load(&attr, uattr, size);
+		bpf_attrs_init(&common_attrs, &common_attr, uattr_common, size_common);
+		err = bpf_btf_load(&attr, uattr, size, &common_attrs);
 		break;
 	case BPF_BTF_GET_FD_BY_ID:
 		err = bpf_btf_get_fd_by_id(&attr);
-- 
2.52.0