From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 ADB3D29A0 for ; Tue, 15 Oct 2024 09:01:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728982899; cv=none; b=S141GfpLLI0T3hjmHKVK1V9G37aF9nc8f0VzR5GEdO/QoNg3j5F5sQ3Xd3iWOvpQ+K2vVjy4eO5yiiy1CsJtHOiHa+JNuUhgUcTjngHtU5Wh1SrURGwI5YIHk8saaQzYAo8ydAkoNvWLHQawmVLd0osK/9zpzkhB0zLt0PjAM5g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728982899; c=relaxed/simple; bh=BlD/GoPAHAQaSbOG0QLNfGFxkbyYmH5JzSwFT0ltjkQ=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=AUhlAAnvQAYOASbtF7cohLtxOIAMEdNE9rAeNgwAC9Diik+LvBovfJEItYmeGvI/6GAVe12GQDeG8JanT0fMegYxkFcqH85h+tF/UXPJ4j02zNuKjqvOiTYruEUtC3x+pfopvu6RZ9yUz5VKLwKiIGoaanEs9qGnRt9wH+YIGwQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EwlTBhNh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EwlTBhNh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E767C4CEC6; Tue, 15 Oct 2024 09:01:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728982899; bh=BlD/GoPAHAQaSbOG0QLNfGFxkbyYmH5JzSwFT0ltjkQ=; h=Date:Subject:To:References:From:In-Reply-To:From; b=EwlTBhNhMf/qdx4KwZo9aaQ+UTLWMXr8/sNnqrtyZ8b9KJKQKlrScPoVgbimCFbZr HKfKSrKa4whoTvDZqNkzJMZ2tbx+GGZg5zPzpPpnYXVbqBMSESW2l0Nmj8JOaG6QM1 +CCCboziCwhX3eUu5yMAjHUbv2baDlkshxzMR3kOYvEpjOyrE3LkU5sXNzBrgq2XKu yanPO5GDMyy/foQdSa3Tj36oe7bMSSpzsF1X9DHBIiVnC/4kHLSX2w1qj0JZMgHZQp u6duFmtunvO+cI6bURzxsnpMLOWxIEHD7tjNuJt/8Eck4qdg/pHwihalF8ehwV/RIA qSNKGqXi4TL4A== Message-ID: <48326975-95fc-4255-80f2-8583749194e5@kernel.org> Date: Tue, 15 Oct 2024 11:01:36 +0200 Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Subject: Re: [PATCH mptcp-next v9 0/7] add mptcp_subflow bpf_iter Content-Language: en-GB To: Geliang Tang , mptcp@lists.linux.dev, Geliang Tang References: <30504191-4b5f-1a69-08a3-5ae0f444c802@gmail.com> <953bf596-94e5-4829-adec-5997e1557487@kernel.org> From: Matthieu Baerts Autocrypt: addr=matttbe@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit Hi Geliang, Thank you for your reply! On 15/10/2024 09:27, Geliang Tang wrote: > Hi Matt, > > Thanks for this review. > > On Mon, 2024-10-14 at 18:08 +0200, Matthieu Baerts wrote: >> Hi Geliang, >> >> On 09/10/2024 12:05, MPTCP CI wrote: >>> Hi Geliang, >>> >>> Thank you for your modifications, that's great! >>> >>> But sadly, our CI spotted some issues with it when trying to build >>> it. >>> >>> You can find more details there: >>> >>>   >>> https://github.com/multipath-tcp/mptcp_net-next/actions/runs/11252652867 >> >> I was looking at applying this series, but there are some issues >> reported by the CI: >> >>   warning: symbol 'bpf_*mptcp_*' was not declared. Should it be >> static? >> >> Could it be possible to have a fix for that please before applying >> the >> series? > > No fix is ​​needed, just ignore these warnings. If possible, I would prefer not to ignore these warnings, because other CI might report the same issue. I didn't check, but can you not simply declare these new helpers as "static"? It looks like we can have kfunc declared as static, no? > This error is also > reported in other places: > > $ make C=1 -o net/socket.o > CALL scripts/checksyscalls.sh > DESCEND objtool > INSTALL libsubcmd_headers > DESCEND bpf/resolve_btfids > INSTALL libsubcmd_headers > CC net/socket.o > CHECK net/socket.c > net/socket.c:1704:21: warning: symbol 'update_socket_protocol' was not > declared. Should it be static? In this example, you are showing one symbol that has been added for MPTCP, maybe we forgot something :) > It seems that it is because "-Wmissing-declarations" is not recognized > by sparse I don't see complains about that when introducing new kfunc, maybe we are supposed to do something else to avoid that? >> I guess you are missing __bpf_kfunc_start_defs() and >> __bpf_kfunc_end_defs() around the declaration of the BPF dedicated >> kfunc, no? > > No. __bpf_kfunc_start_defs() and __bpf_kfunc_end_defs() are indeed used > in patch 2. Thanks, I missed that. >> Also, where should I apply these patches? Before "mptcp: add >> sched_data >> helpers"? > > Yes, before "mptcp: add sched_data helpers", after "selftests/bpf: Add > mptcp subflow subtest". OK! >> But then there should not be any dependences on the BPF >> scheduler work (and I think that would be better without this >> dependence, see my comment on patch 4/7) > > This set doesn't have any dependence on the BPF packet scheduler since > the selftest is added as a ftrace. It somehow depends on packet > scheduler since it invoke some packet scheduler functions such as > mptcp_subflow_active() and bpf_mptcp_subflow_tcp_sock(). OK, but if I insert the series just after "selftests/bpf: Add mptcp subflow subtest", it will not have access to mptcp_subflow_active(). I still need to check your reply on the patch 4/7, but it would be easier if the test doesn't depend on "mptcp_subflow_active()": it's just a test in preparation to the packet scheduler, it is fine if it is not doing interesting for the moment I think. Cheers, Matt -- Sponsored by the NGI0 Core fund.