From nobody Thu Oct 31 00:22:08 2024 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 D7C5C40849; Sat, 27 Jul 2024 10:12:20 +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=1722075140; cv=none; b=TlzrmfFFn4A6hpQaSK5F4W8LqMO5aaegrksuhbA8+VkqlQxivBSTV7C8gFKPyuwi2SG08jy7eudz/voC0Ummi0nRpPPSlNPELPB1+ZloZIIXPyRgDit7HIp4G+EM1z8DHG1NbwtpYMwF8s/UoFva23X9PU14V3DrGosBFF6jt7k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722075140; c=relaxed/simple; bh=bCaMgVST+E6nlnwmefePq27Eu3ZiZE5vGpFBfhZlblU=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=h3RgiGSHQ4eJRRU4mYCWcxp82Nnbj2rJVIKj1d6/HkiOChEEewWo5PvPb/MzdQudw3Mh4HHoztyB8rDx6NHwmx3r0itpJtOyYdw3g5uebgSxWG5eVnwf0krl0249hiw44RlSIBMllXsHdtcVzSQYxGeaXIsi6l0t3AYnszKUTSE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lesZFCSw; 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="lesZFCSw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D064EC4AF09; Sat, 27 Jul 2024 10:12:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1722075140; bh=bCaMgVST+E6nlnwmefePq27Eu3ZiZE5vGpFBfhZlblU=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=lesZFCSw82Lvj7lfYviIrG770L5/v/8zxtuAYqnDEKUUXfQZcGToY5Tg/Z6SXrN2+ WlMO9fIj2iXDXH8WoG5dDxtExnlv3AhMPYRsPeZw0yQsT2YPRcxwwNjzCZdNiFxBDL bJ2jREr69uoubznx4kpRK3P3AEuCkBlAtxH6s/lJjevqiKTTHLsrAlueIjXN1OBWMZ vNfuMbcrpRjrlN+RqxTsGmrqCN7xN04tJNxfndH+ihzn17otfOw7xWoTr0CO0VakNW qJukt72nYW1eUisr/ByxfTN9x9SAasGymez/vDCylMGRyC6vdi8UHhkodR92Ac5O/T g/46jxSuvIC5w== From: "Matthieu Baerts (NGI0)" Date: Sat, 27 Jul 2024 12:10:30 +0200 Subject: [PATCH iproute2-net 1/7] man: mptcp: document 'dev IFNAME' Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240727-upstream-iproute2-net-20240726-mptcp-man-user-feedback-v1-1-c6398c2014ea@kernel.org> References: <20240727-upstream-iproute2-net-20240726-mptcp-man-user-feedback-v1-0-c6398c2014ea@kernel.org> In-Reply-To: <20240727-upstream-iproute2-net-20240726-mptcp-man-user-feedback-v1-0-c6398c2014ea@kernel.org> To: Stephen Hemminger Cc: David Ahern , netdev@vger.kernel.org, MPTCP Upstream , Mat Martineau , Geliang Tang , "Matthieu Baerts (NGI0)" X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1191; i=matttbe@kernel.org; h=from:subject:message-id; bh=bCaMgVST+E6nlnwmefePq27Eu3ZiZE5vGpFBfhZlblU=; b=owEBbQKS/ZANAwAIAfa3gk9CaaBzAcsmYgBmpMgAstfIOovUd8Yhzbd7mp7xtRP9EMSgj0gch 7EcDktVEPaJAjMEAAEIAB0WIQToy4X3aHcFem4n93r2t4JPQmmgcwUCZqTIAAAKCRD2t4JPQmmg c0k8D/9GbxRSkx2obBwjmEF1U3QimDSjJdwzA92kA1IY8mtvJYMqV4o+Wt3xT37RVs3+Fralq43 VNW47rJ1gvqzkCDGc4URCjrqbQ7aaLLN9WlvIqoKDtghXAPjt2jb9MEA4Q5WQtN2z48nwRpCXwE ldre2gwknYzSaxdCJ81Bt/MIyVrK8ofB9JfENqGvhNRriwyArsaS8cFe76ptKclhRY9UBd7a3fQ TUjyrXoc+O8HW1YLvShy7TCB5MkNT9cJzhyTVAJSdBBv/Av582lKaVR0r9QQ32hfnMgkwfFCpos pm/b+RgIE+b3+vXte3k2uHCBwX8vDPO3z//VuHGEeh1QevLXkdvTJWMfze9642kIbTiSYW5JpKU S5sANC7NRz/3ly+SPH6rojxtVw18IjdkZaGHNrI07B2PVBwfD8D9m4zMZQTtZ8duMRBsf0ggrLY 0PcPe9w3KyjndetUMSF07Hah3mpMQ16UnF2nWki6pA/TiHIT5HNs5EtyNMV1dRAx2yYncc4AYtg qNqbMruoV0DS8ZPTV6v07nb2OIqE4L+8D4VTnVdT2eDymUV86u2urYlcrpyrIYxlowBKZ96fmGQ I/pTC+GjSTrH8tYGQmEjUsOJPp4BAFf0QM0IlTmhGmstnUKhsfHi9N7ZpCVoQCHpoUxN5U2oJ+B HBm6Lgn6etT1KxQ== X-Developer-Key: i=matttbe@kernel.org; a=openpgp; fpr=E8CB85F76877057A6E27F77AF6B7824F4269A073 It was missing, while it is a very important option. Indeed, without it, the kernel might not pick the right interface to send packets for additional subflows. Mention that in the man page. Acked-by: Mat Martineau Signed-off-by: Matthieu Baerts (NGI0) --- man/man8/ip-mptcp.8 | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/man/man8/ip-mptcp.8 b/man/man8/ip-mptcp.8 index 6c708957..89fcb64f 100644 --- a/man/man8/ip-mptcp.8 +++ b/man/man8/ip-mptcp.8 @@ -135,6 +135,14 @@ established MPTCP sockets will be accepted on the spec= ified port, regardless the original listener port accepting the first MPTCP subflow and/or this peer being actually on the client side. =20 +.TP +.IR IFNAME +is the network interface name attached to the endpoint. It is important to +specify this device name linked to the address to make sure the system kno= ws how +to route packets from the specified IP address to the correct network inte= rface. +Without this, it might be required to add IP rules and routes to have the +expected behavior. + .TP .IR ID is a unique numeric identifier for the given endpoint --=20 2.45.2