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 561E472 for ; Wed, 24 Nov 2021 16:22:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1637770953; 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=BqGxBopKBIuQl4LFMFwzyPSB/+1d9IMMRR5SAolS5xU=; b=B2RYNJi0sjfBfd8Tlzh/RdwXwaqAlebAlVm0FrcI7tMype7UhYzsYYhCzQOY2CYrNV7DlR +tXu4kPW+cTYYi1489bfKi6Toylp30CI02nqHliA7m8r4yk3gESeroXAgycnN5oPqbZ0N7 pGKmQKhJh0w9rPy8IKLNCrWXEVv+o88= 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-370-Sin3Z6TVOnC73-Y_IB-mrw-1; Wed, 24 Nov 2021 11:22:29 -0500 X-MC-Unique: Sin3Z6TVOnC73-Y_IB-mrw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id E48C51006AA1; Wed, 24 Nov 2021 16:22:28 +0000 (UTC) Received: from gerbillo.redhat.com (unknown [10.39.194.176]) by smtp.corp.redhat.com (Postfix) with ESMTP id B24C61002388; Wed, 24 Nov 2021 16:22:27 +0000 (UTC) From: Paolo Abeni To: mptcp@lists.linux.dev Cc: Phil Greenland Subject: [PATCH mptcp-next v2 0/4] mptcp: improve subflow creation on errors Date: Wed, 24 Nov 2021 17:22:10 +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 2.84 on 10.5.11.22 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: - each endpoint is used only once per connection (patch 2/4) - on failure we try to move to the next subflow, if any (patch 3/4) The first patch is minor cleanup, and the last patch adds specific self-tests. This should 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? this should really cover your use case for good - modulo bugs Paolo Abeni (4): mptcp: clean-up MPJ option writing. mptcp: keep track of used local endpoint mptcp: do not block subflows creation on errors selftests: mptcp: add tests for subflow creation failure net/mptcp/options.c | 65 ++++++++++++------- net/mptcp/pm.c | 29 +++++++++ net/mptcp/pm_netlink.c | 8 ++- net/mptcp/protocol.c | 6 ++ net/mptcp/protocol.h | 5 +- net/mptcp/subflow.c | 5 +- tools/testing/selftests/net/mptcp/config | 1 + .../testing/selftests/net/mptcp/mptcp_join.sh | 65 ++++++++++++++++++- 8 files changed, 156 insertions(+), 28 deletions(-) -- 2.33.1