From patchwork Mon Mar 15 20:12:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Dr. David Alan Gilbert" X-Patchwork-Id: 12140631 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7A899C433E0 for ; Mon, 15 Mar 2021 20:18:02 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 253E064F4C for ; Mon, 15 Mar 2021 20:18:02 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 253E064F4C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:52214 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lLtf7-0006gi-5L for qemu-devel@archiver.kernel.org; Mon, 15 Mar 2021 16:18:01 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:45384) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lLtaB-0000gM-NH for qemu-devel@nongnu.org; Mon, 15 Mar 2021 16:12:55 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:25122) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.90_1) (envelope-from ) id 1lLtaA-0006Sd-10 for qemu-devel@nongnu.org; Mon, 15 Mar 2021 16:12:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1615839173; 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: in-reply-to:in-reply-to:references:references; bh=ZPEUhAvJZq1C7+I1PsU5TJBMdt3I/FwNC0ZWK5/PYq0=; b=gsdreGvlGbjMcAX9PyP2F8RYSithxiLDBoAcT0TtSSl9LgkSm7/DSn2AQQYXC77s4uNhnj hHybkRLa9RlIJH6nb+HnnlapAc3ESVA4awTahYqPLtAhxxn3sF0t3Nttk3y+PcQswS18pT s5TnAYTZM1ARUL/B+UuzQmyZgpnN86o= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-502-u1y_E0mKPlGGVsMon3_r7Q-1; Mon, 15 Mar 2021 16:12:50 -0400 X-MC-Unique: u1y_E0mKPlGGVsMon3_r7Q-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id AB56E1074644; Mon, 15 Mar 2021 20:12:49 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-114-235.ams2.redhat.com [10.36.114.235]) by smtp.corp.redhat.com (Postfix) with ESMTP id 070D9627DC; Mon, 15 Mar 2021 20:12:47 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, groug@kaod.org, vgoyal@redhat.com, wanghao232@huawei.com, ma.mandourr@gmail.com Subject: [PULL 7/9] migration/tls: add error handling in multifd_tls_handshake_thread Date: Mon, 15 Mar 2021 20:12:13 +0000 Message-Id: <20210315201215.222539-8-dgilbert@redhat.com> In-Reply-To: <20210315201215.222539-1-dgilbert@redhat.com> References: <20210315201215.222539-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dgilbert@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=dgilbert@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.25, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: stefanha@redhat.com, peterx@redhat.com, quintela@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Hao Wang If any error happens during multifd send thread creating (e.g. channel broke because new domain is destroyed by the dst), multifd_tls_handshake_thread may exit silently, leaving main migration thread hanging (ram_save_setup -> multifd_send_sync_main -> qemu_sem_wait(&p->sem_sync)). Fix that by adding error handling in multifd_tls_handshake_thread. Signed-off-by: Hao Wang Message-Id: <20210209104237.2250941-3-wanghao232@huawei.com> Reviewed-by: Daniel P. Berrangé Reviewed-by: Chuan Zheng Signed-off-by: Dr. David Alan Gilbert --- migration/multifd.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/migration/multifd.c b/migration/multifd.c index 2a1ea85ade..03527c564c 100644 --- a/migration/multifd.c +++ b/migration/multifd.c @@ -739,7 +739,16 @@ static void multifd_tls_outgoing_handshake(QIOTask *task, } else { trace_multifd_tls_outgoing_handshake_complete(ioc); } - multifd_channel_connect(p, ioc, err); + + if (!multifd_channel_connect(p, ioc, err)) { + /* + * Error happen, mark multifd_send_thread status as 'quit' although it + * is not created, and then tell who pay attention to me. + */ + p->quit = true; + qemu_sem_post(&multifd_send_state->channels_ready); + qemu_sem_post(&p->sem_sync); + } } static void *multifd_tls_handshake_thread(void *opaque)