From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 A836C2C82 for ; Tue, 23 Nov 2021 16:37:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1637685455; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=7UqYbY0sugTamfHJPVEdwLZ0Zb52IEDyLo87DaliwU4=; b=N+dKMM2fQdkJ9K6I2Ft18fyux4yJYt+dNDkvMJPZGU0ybp8aTxCYsrzBRa96mWRw1w0Hxv JX3Em4MU23PsgU5fq/zCPJjUAqPP2li7LLMTJ/hRtYSxE3V5yLyXPeGmyLc1zOclj6KK/k 9Ht4ROrv5HUZtC0i6xcr7i0PkCuVRBU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-564-KsQaMdisN_2rbv_vRAkH-w-1; Tue, 23 Nov 2021 11:37:32 -0500 X-MC-Unique: KsQaMdisN_2rbv_vRAkH-w-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 04F8087D541; Tue, 23 Nov 2021 16:37:31 +0000 (UTC) Received: from gerbillo.fritz.box (unknown [10.39.194.149]) by smtp.corp.redhat.com (Postfix) with ESMTP id 29B1D1981F; Tue, 23 Nov 2021 16:37:29 +0000 (UTC) From: Paolo Abeni To: mptcp@lists.linux.dev Cc: Phil Greenland Subject: [PATCH mptcp-next 0/3] mptcp: improve subflow creation on errors Date: Tue, 23 Nov 2021 17:37:09 +0100 Message-Id: Precedence: bulk X-Mailing-List: mptcp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pabeni@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Currently when a subflow connection fails - either the TCP connection is reset by the peer, or the MPJ handshake never completes - the in kernel PM don't perform any further action. Notably no additional subflow creation is attempted. This series is aimed at improving the in-kernel path manager behavior in the above scenario: on failure we try to move to the next subflow, if any. The first patch is minor cleanup, the feature is implemented by patch 2/3. The last patch adds a specific self-tests. This should possibly address/close: https://github.com/multipath-tcp/mptcp_net-next/issues/235 https://github.com/multipath-tcp/mptcp_net-next/issues/242 @Phil: could you please have a spin in your testbed and see if this is enough to fit you? Paolo Abeni (3): mptcp: clean-up MPJ option writing. mptcp: do not block subflows creation on errors selftests: mptcp: add tests for subflow creation failure net/mptcp/options.c | 63 ++++++++++++------- net/mptcp/protocol.h | 1 + net/mptcp/subflow.c | 12 +++- .../testing/selftests/net/mptcp/mptcp_join.sh | 10 +++ 4 files changed, 61 insertions(+), 25 deletions(-) -- 2.33.1