From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from fhigh-b1-smtp.messagingengine.com (fhigh-b1-smtp.messagingengine.com [202.12.124.152]) (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 6C2453B2FDF; Wed, 20 May 2026 09:17:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=202.12.124.152 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779268627; cv=none; b=eVrv4mLCgbo9kDjr5AFHua3WuXXYwHFTTeBOCqj1uNMpJEIN8eIwucWdmfbp9ZXwQLVCYL5BmbYv+saf/u1djW4/Iy00rHnEs/JeWriTS20Nd3jGrCbAa3y8BUVCT2WilfCFKukn3y7jhUZiQTl1SBqsMR8952LpP0n3MRicOys= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779268627; c=relaxed/simple; bh=jv+tCd9qPM8LPrr00SZ+MJXjX3YScoClfhYx2fHLOEs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Ia5IO9vvdBjnueOgOwLaO5xJbKUrPIMl7mDwWcgRU8Sj7IOOF7PWFoPuDg2PbOEV3F7p+SdQDBCYz6q7iYJCdUaD2e6S695B+O6jsFznTLoiTgE0QSt9oVqEJACZzemdw+zFIw9vpiJOy/fbKrLT7vY/wfGu9dI7Pw9Ki85p7iQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=queasysnail.net; spf=pass smtp.mailfrom=queasysnail.net; dkim=pass (2048-bit key) header.d=queasysnail.net header.i=@queasysnail.net header.b=sS2fN1Hz; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b=clom9Xts; arc=none smtp.client-ip=202.12.124.152 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=queasysnail.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=queasysnail.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=queasysnail.net header.i=@queasysnail.net header.b="sS2fN1Hz"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="clom9Xts" Received: from phl-compute-10.internal (phl-compute-10.internal [10.202.2.50]) by mailfhigh.stl.internal (Postfix) with ESMTP id 89F7E7A00F7; Wed, 20 May 2026 05:17:01 -0400 (EDT) Received: from phl-frontend-04 ([10.202.2.163]) by phl-compute-10.internal (MEProxy); Wed, 20 May 2026 05:17:02 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=queasysnail.net; h=cc:cc:content-type:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:subject:subject:to:to; s=fm1; t=1779268621; x= 1779355021; bh=qoUvFC+Nzu1FEL3zt+T920Q2Lm6zqETblFzq30uij/k=; b=s S2fN1HzDdXu2NpPnhbHiHGRLwYo2QFDWuEd32MQcl664vYv/3o3gOp9PjdG8qhdd gy4Hn1jxEgVjhOv/1TNCfbPRdZ0afeNMsZoY1SYAnhvL/wPTS+ozsGZdvPitW4tf de/5U+7MtF3C180LdQTt2IMcGtyM/VHEV+4wgD/AarlyqMU2jZogg+llDjtBBlZm 7HQF7d92Nm2dLujgkEEYpHJ7jKyBoJePBI8DL9MmOjkVfIuKy5tCd+XrRAn5mj9A Q0kh6gfh6s6gDQ43n+BEVt6UJ86Ix1Aq45OPlWC3HsC2UDEudO0x13B9n4X8E5yb UUnJ/RY/HTMw32T/fnLiw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:content-type:date:date :feedback-id:feedback-id:from:from:in-reply-to:in-reply-to :message-id:mime-version:references:reply-to:subject:subject:to :to:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm3; t= 1779268621; x=1779355021; bh=qoUvFC+Nzu1FEL3zt+T920Q2Lm6zqETblFz q30uij/k=; b=clom9XtsD2ZCICqXla38O6M7FBEabfIFuB7hQW4W4GcnAU2zcXf Kkx5b8pebBwwY5fyyJT/UT0HHPjpuiqUgkkQnDuuM4IfSYXkjQzdeQqqmKyXxeYI pnjOIUZ53AbOMqwHr2o1C4SQJyL7EkZXIp6WzV2n/hE6PFiqVFMfAYhKt8PR0y5Q x8cNKXHHJp7XY0hndiKo0zCyNtfhDsEyt3d/yVeW+8mToF99SVRt5hrb0uvI2Uks dIFML9TSOC2F+Fn/ogj69nq/6/kOBIMhK/A5ZoR/Cweu8MSkTkmcoNcFz/QBNWI9 asCEgNTZ8QNxgAQbpBjhVLTg3NYQauPoETg== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeefhedrtddtgddugeegvdehucetufdoteggodetrf dotffvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfurfetoffkrfgpnffqhgenuceu rghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujf gurhepfffhvfevuffkfhggtggujgesthdtredttddtjeenucfhrhhomhepufgrsghrihhn rgcuffhusghrohgtrgcuoehsugesqhhuvggrshihshhnrghilhdrnhgvtheqnecuggftrf grthhtvghrnhepuefhhfffgfffhfefueeiudegtdefhfekgeetheegheeifffguedvueff fefgudffnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomh epshgusehquhgvrghshihsnhgrihhlrdhnvghtpdhnsggprhgtphhtthhopeelpdhmohgu vgepshhmthhpohhuthdprhgtphhtthhopegrnhhtohhnihhosehophgvnhhvphhnrdhnvg htpdhrtghpthhtohepmhhitghhrggvlhdrsghomhhmrghrihhtohesghhmrghilhdrtgho mhdprhgtphhtthhopegrnhgurhgvfidonhgvthguvghvsehluhhnnhdrtghhpdhrtghpth htohepuggrvhgvmhesuggrvhgvmhhlohhfthdrnhgvthdprhgtphhtthhopegvughumhgr iigvthesghhoohhglhgvrdgtohhmpdhrtghpthhtohepkhhusggrsehkvghrnhgvlhdroh hrghdprhgtphhtthhopehprggsvghnihesrhgvughhrghtrdgtohhmpdhrtghpthhtohep nhgvthguvghvsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtoheplhhinhhugi dqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhg X-ME-Proxy: Feedback-ID: i934648bf:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 20 May 2026 05:17:00 -0400 (EDT) Date: Wed, 20 May 2026 11:16:58 +0200 From: Sabrina Dubroca To: Antonio Quartulli Cc: Michael Bommarito , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net] net: ovpn: refuse TCP socket layering with an active ULP Message-ID: References: <20260517155645.3882533-1-michael.bommarito@gmail.com> <2932f619-81a0-4c26-8adf-7a7d0256a137@openvpn.net> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <2932f619-81a0-4c26-8adf-7a7d0256a137@openvpn.net> 2026-05-20, 09:22:01 +0200, Antonio Quartulli wrote: > Hi Sabrina, > > On 19/05/2026 16:32, Sabrina Dubroca wrote: > > mptcp calls tcp_set_ulp() from the setup, maybe ovpn can also do > > that. detach() may be an issue. > > What is your exact concern with detach()? if we prevent other protocols from > stacking, what is there to deal with in detach()? IIRC, ULP doesn't have a concept of "detach" (without close). So if you want to detach and then reattach the same socket, I think the ULP infra will need some work. -- Sabrina