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 2DB9020E33E for ; Thu, 23 Jan 2025 11:46:02 +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=1737632762; cv=none; b=ZG22+wIaeg3YGc4lR/f5fym3Q75rumy5K7TumiLnaulrsPWSCXgev1bRUS1+sDy+ZWLsrAjvzkdiL3oqsr0y1xYdmD658sSg7O4kgQB0gBwO96Wngn/WN/Uf7QyPMIwV6CFd9g2astWFZsaOZewFUGjB6XpVZWZ/5m2O00mMjxU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737632762; c=relaxed/simple; bh=N/5PDVYVOwrSBFehBCd2GtXDQ1NhB6Lg/T0JIvdDv7g=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=h/eX/wAULmBLfuW1AAM5hWPkkc98vJtwlBxUN/MChHlbXGaMEeNr15yCk17PvaD0PfW6vhVm1nq2+iCYef+vKe+qF82i29GmRqTi7FLMnmv7NO8DEbaE9JQ0HYg7TYcWJZo3oYrdIzd8Lm4DXOHuh1WwWyV2CbjSJh+JSNl3rFM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZRj7gabF; 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="ZRj7gabF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 46B15C4CEDF; Thu, 23 Jan 2025 11:46:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1737632762; bh=N/5PDVYVOwrSBFehBCd2GtXDQ1NhB6Lg/T0JIvdDv7g=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZRj7gabFDIZPGE0w8JEBvqMPlEpdftGdj66dFkTqKpyNUydUniH6Pw79LLalAIMKO TaSbRji1ge7yyUfHD8mN/JigF/ByTuakuB8seUn6GvYDedB/24SXJSKm0keL64AbO0 Z6WJQVB56PvGNxTh5spZHb7Zi0Od1ipvSdMUhracV3LoD6z0+0t8oPBujqOfPOYv3J xqZ3al5JyPCTqiwqgU66nSRTIR172itl77+eusnbYKyj50NO3KMjgM/ve8ncOpmTtr lNGyNQ/6ScJu88JMgch9srxibN3HH+nVcqHTl+0VMh5tYdDZeeNPFiDs+koEIaYmsA igcAC12aIJOig== Message-ID: <48545f14-f7e4-4801-9f92-9277d56ca4ba@kernel.org> Date: Thu, 23 Jan 2025 12:45:50 +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 7/7] mptcp: change is_backup interfaces as get_flags Content-Language: en-GB To: Geliang Tang , mptcp@lists.linux.dev Cc: Geliang Tang References: <75f5ab33f0a11d32eeaa9af698df6e64bb1da951.1737012165.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 > > is_backup() interface of the path managers is not very common. A more > common approach is to add a get_flags() interface to obtain the flags > value of a given address. Then is_backup() can be implemented through > get_flags() by test whether backup flag is set in the flags value. Mmh, I don't know: the different PMs handle the flags differently, e.g. on the userspace side, there is no concept of 'subflow', 'signal', 'implicit' and 'fullmesh' like we have with the in-kernel one. In fact, only 'backup' is used, which is why only 'backup' is common to each others. In that way, having a dedicated 'is_backup()' interface seems to make more sense than 'get_flags()'. Plus these 'get_flags()' helpers are only used in the 'mptcp_pm_is_backup()' interface, so why not only using _is_backup()? Do you think we need this modification then? Cheers, Matt -- Sponsored by the NGI0 Core fund.