From nobody Sun Oct 5 19:25:50 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1504116997568989.7321157092688; Wed, 30 Aug 2017 11:16:37 -0700 (PDT) Received: from localhost ([::1]:52088 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dn7XX-000246-Ia for importer@patchew.org; Wed, 30 Aug 2017 14:16:35 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53235) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dn7Ou-00025r-Ie for qemu-devel@nongnu.org; Wed, 30 Aug 2017 14:07:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dn7Op-0001ea-LT for qemu-devel@nongnu.org; Wed, 30 Aug 2017 14:07:40 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58320) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dn7Oi-0001bO-5Z; Wed, 30 Aug 2017 14:07:28 -0400 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 mx1.redhat.com (Postfix) with ESMTPS id 390764A6F1; Wed, 30 Aug 2017 18:07:27 +0000 (UTC) Received: from red.redhat.com (ovpn-122-186.rdu2.redhat.com [10.10.122.186]) by smtp.corp.redhat.com (Postfix) with ESMTP id DAB7E17106; Wed, 30 Aug 2017 18:07:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 390764A6F1 Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=eblake@redhat.com From: Eric Blake To: qemu-devel@nongnu.org Date: Wed, 30 Aug 2017 13:07:07 -0500 Message-Id: <20170830180711.7974-8-eblake@redhat.com> In-Reply-To: <20170830180711.7974-1-eblake@redhat.com> References: <20170830180711.7974-1-eblake@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Wed, 30 Aug 2017 18:07:27 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 07/11] nbd/client: refactor nbd_receive_reply X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Paolo Bonzini , Vladimir Sementsov-Ogievskiy , "open list:Network Block Dev..." , Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Vladimir Sementsov-Ogievskiy Refactor nbd_receive_reply to return 1 on success, 0 on eof, when no data was read and <0 for other cases, because returned size of read data is not actually used. Signed-off-by: Vladimir Sementsov-Ogievskiy Message-Id: <20170804151440.320927-4-vsementsov@virtuozzo.com> [eblake: tweak function comments] Signed-off-by: Eric Blake --- include/block/nbd.h | 2 +- nbd/client.c | 12 +++++++++--- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/include/block/nbd.h b/include/block/nbd.h index 9c3d0a5868..f7450608b4 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -164,7 +164,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *= name, int nbd_init(int fd, QIOChannelSocket *sioc, NBDExportInfo *info, Error **errp); ssize_t nbd_send_request(QIOChannel *ioc, NBDRequest *request); -ssize_t nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp); +int nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp); int nbd_client(int fd); int nbd_disconnect(int fd); diff --git a/nbd/client.c b/nbd/client.c index 4556056daa..f8c213bc96 100644 --- a/nbd/client.c +++ b/nbd/client.c @@ -914,11 +914,16 @@ ssize_t nbd_send_request(QIOChannel *ioc, NBDRequest = *request) return nbd_write(ioc, buf, sizeof(buf), NULL); } -ssize_t nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp) +/* nbd_receive_reply + * Returns 1 on success + * 0 on eof, when no data was read (errp is not set) + * negative errno on failure (errp is set) + */ +int nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp) { uint8_t buf[NBD_REPLY_SIZE]; uint32_t magic; - ssize_t ret; + int ret; ret =3D nbd_read_eof(ioc, buf, sizeof(buf), errp); if (ret <=3D 0) { @@ -948,6 +953,7 @@ ssize_t nbd_receive_reply(QIOChannel *ioc, NBDReply *re= ply, Error **errp) error_setg(errp, "invalid magic (got 0x%" PRIx32 ")", magic); return -EINVAL; } - return sizeof(buf); + + return 1; } --=20 2.13.5