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[109.190.18.76]) by mx.google.com with ESMTPS id cu1sm21381569wib.6.2012.08.07.06.44.39 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 07 Aug 2012 06:44:40 -0700 (PDT) From: "=?UTF-8?q?Beno=C3=AEt=20Canet?=" To: qemu-devel@nongnu.org Date: Tue, 7 Aug 2012 15:44:24 +0200 Message-Id: <1344347073-7773-2-git-send-email-benoit@irqsave.net> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1344347073-7773-1-git-send-email-benoit@irqsave.net> References: <1344347073-7773-1-git-send-email-benoit@irqsave.net> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 74.125.82.173 Cc: kwolf@redhat.com, stefanha@linux.vnet.ibm.com, blauwirbel@gmail.com, anthony@codemonkey.ws, pbonzini@redhat.com, eblake@redhat.com, afaerber@suse.de, =?UTF-8?q?Beno=C3=AEt=20Canet?= Subject: [Qemu-devel] =?utf-8?q?=5BRFC_V2_01/10=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 | 44 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) create mode 100644 block/quorum.c diff --git a/block/Makefile.objs b/block/Makefile.objs index b5754d3..66af6dc 100644 --- a/block/Makefile.objs +++ b/block/Makefile.objs @@ -4,6 +4,7 @@ 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 += parallels.o nbd.o blkdebug.o sheepdog.o blkverify.o block-obj-y += stream.o +block-obj-y += quorum.o block-obj-$(CONFIG_WIN32) += raw-win32.o block-obj-$(CONFIG_POSIX) += raw-posix.o block-obj-$(CONFIG_LIBISCSI) += iscsi.o diff --git a/block/quorum.c b/block/quorum.c new file mode 100644 index 0000000..046b183 --- /dev/null +++ b/block/quorum.c @@ -0,0 +1,44 @@ +/* + * Quorum Block filter + * + * Copyright (C) Nodalink, SARL. 2012 + * + * 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_int.h" + +typedef struct QuorumAIOCB QuorumAIOCB; + +typedef struct QuorumSingleAIOCB { + BlockDriverAIOCB *aiocb; + char *buf; + int ret; + QuorumAIOCB *parent; +} QuorumSingleAIOCB; + +struct QuorumAIOCB { + BlockDriverAIOCB common; + QEMUBH *bh; + + /* Request metadata */ + int64_t sector_num; + int nb_sectors; + + QEMUIOVector *qiov; /* calling readv IOV */ + + QuorumSingleAIOCB aios[3]; /* individual AIOs */ + QEMUIOVector qiovs[3]; /* individual IOVs */ + int count; /* number of completed AIOCB */ + bool *finished; /* completion signal for cancel */ + + void (*vote)(QuorumAIOCB *acb); + int vote_ret; +};