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 6BC4520E31C for ; Thu, 23 Jan 2025 11:41:02 +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=1737632463; cv=none; b=qkpwzZShLZW1I9d6iYIjcxPVpLFh47vhgIuZSz2QMq2LRTnPcBzfBxYFRohxnyLety3Z2cxdFSBHDUqTV6wLGuUcREcDiFr/7j3rvOMaLVACKm31CNU1plAdtSNPYWD/vHfb54b1mwp2X7tr7sXBHnjLNR+7pYY9ANi4BW9VLUc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737632463; c=relaxed/simple; bh=naNasDtzY6bf33UuO27Mh3iITn0g/I5/3uPsIThp6VA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Rdt1MjvuE8y3oycZJhNtm82OsTB169liwZ1Q5eJaDASn+uwNqIupZkou0Kzfwibzw/YHqfe05Zd/VOkLGpr0HXiKxmMe6jBUK6bno2Ri/cIHa3z+sUNwzVVkdPMz8xCHTxIXqsOYWppM7POOpSWfwbfvggOcGRDB6krMbM2+CWg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=CGawSvcM; 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="CGawSvcM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0FE3CC4CED3; Thu, 23 Jan 2025 11:40:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737632462; bh=naNasDtzY6bf33UuO27Mh3iITn0g/I5/3uPsIThp6VA=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=CGawSvcMjcuB2+/OeDSynLIUpm464fc7S/A3lwuTX7NBNM9v/rdvtOdmgS9j/la3x C+0R1rdieg6pbyB+DJkRokrbo+STAEzFQ+A76JOOS2JGCtjIEiHTng6ETyk+FsswXS edG0XQ0wUDZqESr14SLry7bLyW7usDTRYTKF42QCP4dO1cdFaSu1qoe5C09MJAcxbJ 2yY0U318ZB/82GxCee/E+53vhuRPP8/+0VDKv4yfsGB6a+MKMcR5viRi/WoJNojyoP G8IOLnV4tWh1C8lWYGOvSJnBNfGwo90gnKC2h5bU64fTqp1ectVxsuTmbzCu2RWefQ TI/I8VPXQjvXA== Message-ID: <5caed8de-3332-46fc-a38c-16f66dc9ad1d@kernel.org> Date: Thu, 23 Jan 2025 12:40:42 +0100 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 v4 3/7] mptcp: add struct mptcp_pm_addr_id_bitmap Content-Language: en-GB To: Geliang Tang , mptcp@lists.linux.dev Cc: Geliang Tang References: <30d07c758cfb06aeb312fe37238ce60fc120da13.1737012165.git.tanggeliang@kylinos.cn> From: Matthieu Baerts Autocrypt: addr=matttbe@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit Hi Geliang, On 16/01/2025 08:26, Geliang Tang wrote: > From: Geliang Tang > > To simplify the use of bitmap in BPF, a new type for MPTCP userspace > pm id bitmap, struct mptcp_pm_addr_id_bitmap is defined. Because > there's no way to use DECLARE_BITMAP macro in BPF program, and it's > not easy to reimplement it in BPF. OK, I got that this is needed in BPF, but: why do you need it in the BPF PM? I guess it is not for the dump_addr interface, right? If yes, then maybe you don't need that, see my comment on the previous patch. If not, what is it for? I can understand that it might be needed to have a bitmap per msk to handle the different address IDs. But then why is it needed to change the code in pm_userspace.c, especially in mptcp_userspace_pm_dump_addr? Cheers, Matt -- Sponsored by the NGI0 Core fund.