From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55663) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VRLiS-0006CM-AI for qemu-devel@nongnu.org; Wed, 02 Oct 2013 08:39:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VRLiN-00074s-AA for qemu-devel@nongnu.org; Wed, 02 Oct 2013 08:39:44 -0400 Received: from nodalink.pck.nerim.net ([62.212.105.220]:42231 helo=paradis.irqsave.net) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VRLiM-00074k-VC for qemu-devel@nongnu.org; Wed, 02 Oct 2013 08:39:39 -0400 From: =?UTF-8?q?Beno=C3=AEt=20Canet?= Date: Wed, 2 Oct 2013 14:39:14 +0200 Message-Id: <1380717564-11098-2-git-send-email-benoit@irqsave.net> In-Reply-To: <1380717564-11098-1-git-send-email-benoit@irqsave.net> References: <1380717564-11098-1-git-send-email-benoit@irqsave.net> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH V9 01/11] quorum: Create quorum.c, add QuorumSingleAIOCB and QuorumAIOCB. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kwolf@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@redhat.com Signed-off-by: Benoit Canet --- block/Makefile.objs | 1 + block/quorum.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++= ++++++ 2 files changed, 55 insertions(+) create mode 100644 block/quorum.c diff --git a/block/Makefile.objs b/block/Makefile.objs index 3bb85b5..05a65c2 100644 --- a/block/Makefile.objs +++ b/block/Makefile.objs @@ -3,6 +3,7 @@ block-obj-y +=3D qcow2.o qcow2-refcount.o qcow2-cluster.o= qcow2-snapshot.o qcow2-c block-obj-y +=3D qed.o qed-gencb.o qed-l2-cache.o qed-table.o qed-cluste= r.o block-obj-y +=3D qed-check.o block-obj-y +=3D vhdx.o +block-obj-y +=3D quorum.o block-obj-y +=3D parallels.o blkdebug.o blkverify.o block-obj-y +=3D snapshot.o qapi.o block-obj-$(CONFIG_WIN32) +=3D raw-win32.o win32-aio.o diff --git a/block/quorum.c b/block/quorum.c new file mode 100644 index 0000000..76a1fbb --- /dev/null +++ b/block/quorum.c @@ -0,0 +1,54 @@ +/* + * Quorum Block filter + * + * Copyright (C) 2012-2013 Nodalink, SARL. + * + * Author: + * Beno=C3=AEt Canet + * + * Based on the design and code of blkverify.c (Copyright (C) 2010 IBM, = Corp) + * and blkmirror.c (Copyright (C) 2011 Red Hat, Inc). + * + * This work is licensed under the terms of the GNU GPL, version 2 or la= ter. + * See the COPYING file in the top-level directory. + */ + +#include "block/block_int.h" + +typedef struct QuorumAIOCB QuorumAIOCB; + +/* Quorum will create one instance of the following structure per read/w= rite + * operation it do on it's children. + * So for each read/write operation coming from the upper layer there wi= ll be + * $children_count QuorumSingleAIOCB. + */ +typedef struct QuorumSingleAIOCB { + BlockDriverAIOCB *aiocb; + QEMUIOVector qiov; + uint8_t *buf; + int ret; + QuorumAIOCB *parent; +} QuorumSingleAIOCB; + +/* Quorum will use the following structure to track progress of each rea= d/write + * operation received by the upper layer. + * This structure hold pointers to the QuorumSingleAIOCB structures inst= ances + * used to do operations on each children and track overall progress. + */ +struct QuorumAIOCB { + BlockDriverAIOCB common; + + /* Request metadata */ + uint64_t sector_num; + int nb_sectors; + + QEMUIOVector *qiov; /* calling IOV */ + + QuorumSingleAIOCB *aios; /* individual AIOs */ + int count; /* number of completed AIOCB */ + int success_count; /* number of successfully completed AIOC= B */ + bool *finished; /* completion signal for cancel */ + + bool is_read; + int vote_ret; +}; --=20 1.8.1.2