From patchwork Wed Dec 18 02:44:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "D. Wythe" X-Patchwork-Id: 13912956 Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) (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 75D8513C81B; Wed, 18 Dec 2024 02:44:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.98 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734489875; cv=none; b=SttUDIBX50rV5aZwe6CCWv9oVr5Qc6zEw1YBaVwCAymarcfAe2Xf8wMOsZn7vrnOL5ereTqSNKJxMtHiZS4e6LFOTITWCFOZTHN2ai1oBKopUSv1DnWOJRl31f5qa17QkDDiA0+PIHepZLSKEIQbibSs+Jh3mTiLjSi6VNBj9NU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734489875; c=relaxed/simple; bh=8Me0+ORdUwnQJJZusQP7gsBibbKOgKoUBm5L+YNIMj0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=q5DcSQMydlEwUdCCo0moSzteLtRCzIVkESBqoB5vqjpbpNsPnx8RYH+puD/q2GebnelaZwv5bRKI/c+e8isfStE1s9r11ChhwBHPzqfUVSVUIu8aeR0uYQ15X9d+l/PlVD0a0En6QE0uyx5tQd+CQfnQDdHuXibnD4xjp9SBsZk= 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=QgkUQ4wR; arc=none smtp.client-ip=115.124.30.98 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="QgkUQ4wR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1734489870; h=From:To:Subject:Date:Message-ID:MIME-Version; bh=GAH1Lz6yySHh0akD6UjVzqvmSG58TUkUU80VrEvWcyY=; b=QgkUQ4wR4yaxnjMldItkIUu/YQf1UST2NbfDV29GgC255tQygnkLpL1rXXuCCVIEpYZvYIRZ5LpGTfngFzW/bS9GyuC3m3CZ95XI2YC90CGO4ZMiKO/Kbs7wnwnZzIJOv5Pz5kipM/BFVcA6AquWnPKPGujMGvms6RaV61yDejY= Received: from j66a10360.sqa.eu95.tbsite.net(mailfrom:alibuda@linux.alibaba.com fp:SMTPD_---0WLko6dn_1734489867 cluster:ay36) by smtp.aliyun-inc.com; Wed, 18 Dec 2024 10:44:28 +0800 From: "D. Wythe" To: kgraul@linux.ibm.com, wenjia@linux.ibm.com, jaka@linux.ibm.com, 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, guwen@linux.alibaba.com Cc: kuba@kernel.org, davem@davemloft.net, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH bpf-next v3 1/5] bpf: export necessary sympols for modules with struct_ops Date: Wed, 18 Dec 2024 10:44:17 +0800 Message-ID: <20241218024422.23423-2-alibuda@linux.alibaba.com> X-Mailer: git-send-email 2.45.0 In-Reply-To: <20241218024422.23423-1-alibuda@linux.alibaba.com> References: <20241218024422.23423-1-alibuda@linux.alibaba.com> Precedence: bulk X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 606efe32485a..00c212e0ad39 100644 --- a/kernel/bpf/bpf_struct_ops.c +++ b/kernel/bpf/bpf_struct_ops.c @@ -1119,6 +1119,7 @@ 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) { @@ -1130,6 +1131,7 @@ void bpf_struct_ops_put(const void *kdata) bpf_map_put(&st_map->map); } +EXPORT_SYMBOL_GPL(bpf_struct_ops_put); int bpf_struct_ops_supported(const struct bpf_struct_ops *st_ops, u32 moff) { diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index 5684e8ce132d..62238ec989dc 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -1167,6 +1167,7 @@ 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,