From patchwork Mon Jan 28 17:07:13 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Beno=C3=AEt_Canet?= X-Patchwork-Id: 216257 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id A32F02C0090 for ; Tue, 29 Jan 2013 04:07:32 +1100 (EST) Received: from localhost ([::1]:42196 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TzsB8-0006nb-Km for incoming@patchwork.ozlabs.org; Mon, 28 Jan 2013 12:07:30 -0500 Received: from eggs.gnu.org ([208.118.235.92]:45565) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TzsAh-0006f3-S9 for qemu-devel@nongnu.org; Mon, 28 Jan 2013 12:07:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TzsAa-00006Q-0Z for qemu-devel@nongnu.org; Mon, 28 Jan 2013 12:07:03 -0500 Received: from nodalink.pck.nerim.net ([62.212.105.220]:48491 helo=paradis.irqsave.net) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TzsAZ-000066-M3 for qemu-devel@nongnu.org; Mon, 28 Jan 2013 12:06:55 -0500 Received: by paradis.irqsave.net (Postfix, from userid 1002) id 03EAE87432C; Mon, 28 Jan 2013 18:06:54 +0100 (CET) Received: from localhost.localdomain (unknown [192.168.77.1]) by paradis.irqsave.net (Postfix) with ESMTP id DE62B87431B; Mon, 28 Jan 2013 18:06:42 +0100 (CET) From: =?UTF-8?q?Beno=C3=AEt=20Canet?= To: qemu-devel@nongnu.org Date: Mon, 28 Jan 2013 18:07:13 +0100 Message-Id: <1359392845-15905-2-git-send-email-benoit@irqsave.net> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1359392845-15905-1-git-send-email-benoit@irqsave.net> References: <1359392845-15905-1-git-send-email-benoit@irqsave.net> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 62.212.105.220 Cc: kwolf@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= , stefanha@redhat.com Subject: [Qemu-devel] =?utf-8?q?=5BRFC_V8_01/13=5D_quorum=3A_Create_quorum?= =?utf-8?q?=2Ec=2C_add_QuorumSingleAIOCB_and_QuorumAIOCB=2E?= X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Benoit Canet --- block/Makefile.objs | 1 + block/quorum.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 46 insertions(+) create mode 100644 block/quorum.c diff --git a/block/Makefile.objs b/block/Makefile.objs index c067f38..4143e34 100644 --- a/block/Makefile.objs +++ b/block/Makefile.objs @@ -2,6 +2,7 @@ block-obj-y += raw.o cow.o qcow.o vdi.o vmdk.o cloop.o dmg.o bochs.o vpc.o vvfat block-obj-y += qcow2.o qcow2-refcount.o qcow2-cluster.o qcow2-snapshot.o qcow2-cache.o block-obj-y += qed.o qed-gencb.o qed-l2-cache.o qed-table.o qed-cluster.o block-obj-y += qed-check.o +block-obj-y += quorum.o block-obj-y += parallels.o blkdebug.o blkverify.o block-obj-$(CONFIG_WIN32) += raw-win32.o win32-aio.o block-obj-$(CONFIG_POSIX) += raw-posix.o diff --git a/block/quorum.c b/block/quorum.c new file mode 100644 index 0000000..8dc6e4c --- /dev/null +++ b/block/quorum.c @@ -0,0 +1,45 @@ +/* + * Quorum Block filter + * + * Copyright (C) 2012-2013 Nodalink, SARL. + * + * Author: + * Benoît 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 later. + * See the COPYING file in the top-level directory. + */ + +#include "block/block_int.h" + +typedef struct QuorumAIOCB QuorumAIOCB; + +typedef struct QuorumSingleAIOCB { + BlockDriverAIOCB *aiocb; + QEMUIOVector qiov; + uint8_t *buf; + int ret; + QuorumAIOCB *parent; +} QuorumSingleAIOCB; + +struct QuorumAIOCB { + BlockDriverAIOCB common; + QEMUBH *bh; + + /* Request metadata */ + uint64_t sector_num; + int nb_sectors; + + QEMUIOVector *qiov; /* calling readv IOV */ + + QuorumSingleAIOCB *aios; /* individual AIOs */ + int count; /* number of completed AIOCB */ + int success_count; /* number of successfully completed AIOCB */ + bool *finished; /* completion signal for cancel */ + + void (*vote)(QuorumAIOCB *acb); + int vote_ret; +};