From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-100.freemail.mail.aliyun.com (out30-100.freemail.mail.aliyun.com [115.124.30.100]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 303A4253B64; Mon, 29 Sep 2025 06:34:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.100 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759127656; cv=none; b=VJX2V77b0JsdHQpYY6jvyKqHhWRA9pvomhpyZ8JhXHt+cZosncyFQo2Riu/ni+I+ZO89H2OlAdwHpkpC2jjj7j+Q7PYt8rWLf2/G3/HXKpY8IjbD5hS1WFr/dsfO8QsH/+zES8n//nJKZR9yPotEOsfbyV8I2tjSz0LTreHFv6M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1759127656; c=relaxed/simple; bh=cyEp58DN6vNVThVgPjwJc95aGiBbz6zIFNE/awwwII8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Gx9rd3XUbq6bZYZ2vCEqbzIfq3mrgCCj44Sh68LmYhzkcn59RUdcQauKvIE88980DBbnsDJahUpgUd7BYeIaXaME1GhGtUm/zwJRrn9nLmIb/DFRmhzc/U/A/akZ3G2HRRVwgNaeNYX63G7+BZgMLYR42PEFIw4HhlX2+11v5OE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=lUaNvApJ; arc=none smtp.client-ip=115.124.30.100 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="lUaNvApJ" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1759127646; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=mT3ZqH1FIdOVakUFJ8XojXTPFD1lPsOCA5ZpuKw5CaA=; b=lUaNvApJYG728Iy/FI+n3tOLMI88i5Leuyts6hjkcEYltvcEDnXf2diIh3WxgVSQDNOSk4VPWZZcrgH9Mvsv7oaipZyrkMC2hG8FsdroNpiIp+S+p8nW1oAPjBBjBEsoBG0rQK9PJBkW+bKDjKPAq02Hed4NoDzhzOOpV9AASfI= Received: from j66a10360.sqa.eu95.tbsite.net(mailfrom:alibuda@linux.alibaba.com fp:SMTPD_---0Wp07vaL_1759127644 cluster:ay36) by smtp.aliyun-inc.com; Mon, 29 Sep 2025 14:34:05 +0800 From: "D. Wythe" To: ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, pabeni@redhat.com, song@kernel.org, sdf@google.com, haoluo@google.com, yhs@fb.com, edumazet@google.com, john.fastabend@gmail.com, kpsingh@kernel.org, jolsa@kernel.org, mjambigi@linux.ibm.com, wenjia@linux.ibm.com, wintera@linux.ibm.com, dust.li@linux.alibaba.com, tonylu@linux.alibaba.com, guwen@linux.alibaba.com Cc: bpf@vger.kernel.org, davem@davemloft.net, kuba@kernel.org, netdev@vger.kernel.org, sidraya@linux.ibm.com, jaka@linux.ibm.com Subject: [PATCH bpf-next v3 1/3] bpf: export necessary symbols for modules with struct_ops Date: Mon, 29 Sep 2025 14:33:58 +0800 Message-ID: <20250929063400.37939-2-alibuda@linux.alibaba.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20250929063400.37939-1-alibuda@linux.alibaba.com> References: <20250929063400.37939-1-alibuda@linux.alibaba.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Exports three necessary symbols for implementing struct_ops with tristate subsystem. To hold or release refcnt of struct_ops refcnt by inline funcs bpf_try_module_get and bpf_module_put which use bpf_struct_ops_get(put) conditionally. And to copy obj name from one to the other with effective checks by bpf_obj_name_cpy. Signed-off-by: D. Wythe --- kernel/bpf/bpf_struct_ops.c | 2 ++ kernel/bpf/syscall.c | 1 + 2 files changed, 3 insertions(+) diff --git a/kernel/bpf/bpf_struct_ops.c b/kernel/bpf/bpf_struct_ops.c index a41e6730edcf..278490683d28 100644 --- a/kernel/bpf/bpf_struct_ops.c +++ b/kernel/bpf/bpf_struct_ops.c @@ -1162,6 +1162,7 @@ bool bpf_struct_ops_get(const void *kdata) map = __bpf_map_inc_not_zero(&st_map->map, false); return !IS_ERR(map); } +EXPORT_SYMBOL_GPL(bpf_struct_ops_get); void bpf_struct_ops_put(const void *kdata) { @@ -1173,6 +1174,7 @@ void bpf_struct_ops_put(const void *kdata) bpf_map_put(&st_map->map); } +EXPORT_SYMBOL_GPL(bpf_struct_ops_put); u32 bpf_struct_ops_id(const void *kdata) { diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 3f178a0f8eb1..e8ffde2596db 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1204,6 +1204,7 @@ int bpf_obj_name_cpy(char *dst, const char *src, unsigned int size) return src - orig_src; } +EXPORT_SYMBOL_GPL(bpf_obj_name_cpy); int map_check_no_btf(const struct bpf_map *map, const struct btf *btf, -- 2.45.0