From patchwork Mon Dec 18 04:18:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "D. Wythe" X-Patchwork-Id: 13496176 Received: from out30-113.freemail.mail.aliyun.com (out30-113.freemail.mail.aliyun.com [115.124.30.113]) (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 D2A8763A8; Mon, 18 Dec 2023 04:23:58 +0000 (UTC) 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 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R111e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046049;MF=alibuda@linux.alibaba.com;NM=1;PH=DS;RN=13;SR=0;TI=SMTPD_---0Vye8nUn_1702873102; Received: from j66a10360.sqa.eu95.tbsite.net(mailfrom:alibuda@linux.alibaba.com fp:SMTPD_---0Vye8nUn_1702873102) by smtp.aliyun-inc.com; Mon, 18 Dec 2023 12:18:27 +0800 From: "D. Wythe" To: pablo@netfilter.org, kadlec@netfilter.org, fw@strlen.de Cc: bpf@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, coreteam@netfilter.org, netfilter-devel@vger.kernel.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, ast@kernel.org Subject: [RFC nf-next v2 0/2] netfilter: bpf: support prog update Date: Mon, 18 Dec 2023 12:18:19 +0800 Message-Id: <1702873101-77522-1-git-send-email-alibuda@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: X-Patchwork-State: RFC From: "D. Wythe" This patches attempt to implements updating of progs within bpf netfilter link, allowing user update their ebpf netfilter prog in hot update manner. Besides, a corresponding test case has been added to verify whether the update works. --- v1: 1. remove unnecessary context, access the prog directly via rcu. 2. remove synchronize_rcu(), dealloc the nf_link via kfree_rcu. 3. check the dead flag during the update. -- v1->v2: 1. remove unnecessary nf_prog, accessing nf_link->link.prog in direct. D. Wythe (2): netfilter: bpf: support prog update selftests/bpf: Add netfilter link prog update test net/netfilter/nf_bpf_link.c | 63 ++++++++++++---- .../bpf/prog_tests/netfilter_link_update_prog.c | 83 ++++++++++++++++++++++ .../bpf/progs/test_netfilter_link_update_prog.c | 24 +++++++ 3 files changed, 155 insertions(+), 15 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/netfilter_link_update_prog.c create mode 100644 tools/testing/selftests/bpf/progs/test_netfilter_link_update_prog.c