From mboxrd@z Thu Jan 1 00:00:00 1970 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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 8D4A0C3A5A2 for ; Tue, 10 Sep 2019 12:58:24 +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 5FA3220863 for ; Tue, 10 Sep 2019 12:58:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5FA3220863 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]:39506 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i7fiw-00087z-W6 for qemu-devel@archiver.kernel.org; Tue, 10 Sep 2019 08:58:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59777) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i7fTQ-0002re-JH for qemu-devel@nongnu.org; Tue, 10 Sep 2019 08:42:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i7fTP-0005RR-IJ for qemu-devel@nongnu.org; Tue, 10 Sep 2019 08:42:20 -0400 Received: from mx1.redhat.com ([209.132.183.28]:42004) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i7fTN-0005Qg-2L; Tue, 10 Sep 2019 08:42:17 -0400 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 mx1.redhat.com (Postfix) with ESMTPS id 5F1F3C04B2D5; Tue, 10 Sep 2019 12:42:16 +0000 (UTC) Received: from localhost (ovpn-117-90.ams2.redhat.com [10.36.117.90]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 47AAF1001948; Tue, 10 Sep 2019 12:42:12 +0000 (UTC) From: Max Reitz To: qemu-block@nongnu.org Date: Tue, 10 Sep 2019 14:41:36 +0200 Message-Id: <20190910124136.10565-8-mreitz@redhat.com> In-Reply-To: <20190910124136.10565-1-mreitz@redhat.com> References: <20190910124136.10565-1-mreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Tue, 10 Sep 2019 12:42:16 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 7/7] curl: Check curl_multi_add_handle()'s return code 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: Kevin Wolf , qemu-stable@nongnu.org, John Snow , qemu-devel@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" If we had done that all along, debugging would have been much simpler. (Also, I/O errors are better than hangs.) Signed-off-by: Max Reitz --- block/curl.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/block/curl.c b/block/curl.c index c343c7ed3d..f86299378e 100644 --- a/block/curl.c +++ b/block/curl.c @@ -882,7 +882,13 @@ static void curl_setup_preadv(BlockDriverState *bs, = CURLAIOCB *acb) trace_curl_setup_preadv(acb->bytes, start, state->range); curl_easy_setopt(state->curl, CURLOPT_RANGE, state->range); =20 - curl_multi_add_handle(s->multi, state->curl); + if (curl_multi_add_handle(s->multi, state->curl) !=3D CURLM_OK) { + state->acb[0] =3D NULL; + acb->ret =3D -EIO; + + curl_clean_state(state); + goto out; + } =20 /* Tell curl it needs to kick things off */ curl_multi_socket_action(s->multi, CURL_SOCKET_TIMEOUT, 0, &running)= ; --=20 2.21.0