From patchwork Thu Aug 10 17:36:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 13349750 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B3DBCC001E0 for ; Thu, 10 Aug 2023 17:43:19 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qU9g9-00041J-Pv; Thu, 10 Aug 2023 13:42:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qU9g7-0003yy-Qj for qemu-devel@nongnu.org; Thu, 10 Aug 2023 13:42:32 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qU9g5-000508-KV for qemu-devel@nongnu.org; Thu, 10 Aug 2023 13:42:31 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1691689348; 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=ZP4+e/Jb2jUEq9fPciEzbMJ02XSS9UqjjknoRH8Zvzk=; b=PK2f7Sk13JUzudDXefsZ9yCAetw95j+s9qY83TDBBMVJCSrFWFG6Zr3QWDgecPZ1CvNObT H0HmrX6OoQ1hrOaEtbeuQYKgp6sVY6auEdudycgs1o8ZzBTcaORZchjB9hDFSy5OP3TWzH QV78THIWQYda/fFv1HAvPWc1uIYEngA= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-201-fV7edQetNQ-Y5GDliMiPkA-1; Thu, 10 Aug 2023 13:42:25 -0400 X-MC-Unique: fV7edQetNQ-Y5GDliMiPkA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2A6CF101A52E; Thu, 10 Aug 2023 17:42:25 +0000 (UTC) Received: from green.redhat.com (unknown [10.2.16.169]) by smtp.corp.redhat.com (Postfix) with ESMTP id AE4201121314; Thu, 10 Aug 2023 17:42:24 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, vsementsov@yandex-team.ru, Kevin Wolf , Hanna Reitz Subject: [PATCH v5 11/17] nbd/client: Plumb errp through nbd_receive_replies Date: Thu, 10 Aug 2023 12:36:58 -0500 Message-ID: <20230810173646.17695-30-eblake@redhat.com> In-Reply-To: <20230810173646.17695-19-eblake@redhat.com> References: <20230810173646.17695-19-eblake@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 Received-SPF: pass client-ip=170.10.129.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Instead of ignoring the low-level error just to refabricate our own message to pass to the caller, we can just plumb the caller's errp down to the low level. Signed-off-by: Eric Blake --- v5: set errp on more failure cases [Vladimir], typo fix v4: new patch [Vladimir] --- block/nbd.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/block/nbd.c b/block/nbd.c index 57123c17f94..4b60b832b70 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -417,7 +417,8 @@ static void coroutine_fn GRAPH_RDLOCK nbd_reconnect_attempt(BDRVNBDState *s) reconnect_delay_timer_del(s); } -static coroutine_fn int nbd_receive_replies(BDRVNBDState *s, uint64_t cookie) +static coroutine_fn int nbd_receive_replies(BDRVNBDState *s, uint64_t cookie, + Error **errp) { int ret; uint64_t ind = COOKIE_TO_INDEX(cookie), ind2; @@ -458,20 +459,25 @@ static coroutine_fn int nbd_receive_replies(BDRVNBDState *s, uint64_t cookie) /* We are under mutex and cookie is 0. We have to do the dirty work. */ assert(s->reply.cookie == 0); - ret = nbd_receive_reply(s->bs, s->ioc, &s->reply, NULL); - if (ret <= 0) { - ret = ret ? ret : -EIO; + ret = nbd_receive_reply(s->bs, s->ioc, &s->reply, errp); + if (ret == 0) { + ret = -EIO; + error_setg(errp, "server dropped connection"); + } + if (ret < 0) { nbd_channel_error(s, ret); return ret; } if (nbd_reply_is_structured(&s->reply) && s->info.mode < NBD_MODE_STRUCTURED) { nbd_channel_error(s, -EINVAL); + error_setg(errp, "unexpected structured reply"); return -EINVAL; } ind2 = COOKIE_TO_INDEX(s->reply.cookie); if (ind2 >= MAX_NBD_REQUESTS || !s->requests[ind2].coroutine) { nbd_channel_error(s, -EINVAL); + error_setg(errp, "unexpected cookie value"); return -EINVAL; } if (s->reply.cookie == cookie) { @@ -843,9 +849,9 @@ static coroutine_fn int nbd_co_do_receive_one_chunk( } *request_ret = 0; - ret = nbd_receive_replies(s, cookie); + ret = nbd_receive_replies(s, cookie, errp); if (ret < 0) { - error_setg(errp, "Connection closed"); + error_prepend(errp, "Connection closed: "); return -EIO; } assert(s->ioc);