From patchwork Mon Aug 27 07:30:19 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Benoit Canet X-Patchwork-Id: 180140 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 A16BE2C00C1 for ; Mon, 27 Aug 2012 17:30:54 +1000 (EST) Received: from localhost ([::1]:40746 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T5tme-0000sr-Kk for incoming@patchwork.ozlabs.org; Mon, 27 Aug 2012 03:30:52 -0400 Received: from eggs.gnu.org ([208.118.235.92]:49720) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T5tmR-0000sj-Qq for qemu-devel@nongnu.org; Mon, 27 Aug 2012 03:30:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1T5tmQ-0000h9-0F for qemu-devel@nongnu.org; Mon, 27 Aug 2012 03:30:39 -0400 Received: from mail-wi0-f175.google.com ([209.85.212.175]:61867) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T5tmP-0000gr-QD for qemu-devel@nongnu.org; Mon, 27 Aug 2012 03:30:37 -0400 Received: by wibhm2 with SMTP id hm2so2231838wib.10 for ; Mon, 27 Aug 2012 00:30:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=zwVdb5mX5UgYYtzXE/XCqhxi1RVL+JvCi+Bw3nxGQRA=; b=Y4ghyA3xe/3muKAybAPqjWbBsaRxl+fHienleDOkd+C9kAjCod/S3mn3oCyjRgyEYu tfuwKDv63Ne+FzWWUhO6e2WDMZzCtB+kHQsKqKmaYZvQKg4OYK3/LXQK/OnZTwdwE44o YVG5USmVi3HNlRD1vr3dxciXpVE7YkXNbYdLLBSqU4tvQNGihoiTe5yZUhy54waVY/xx sQilU7m8dgwQi5qEPVoQNQuJ/Kr3k06rWUkFTpDMHyqPloVWLZ1qenNYo42RAQoZTuuO 6TAe+6rM7FWW4Hew+s7LtFsGPPsx3+9XVOQeGKfZ5IRbQBg6UA7sVzRyhA1u5Djd3ATr Z8OQ== Received: by 10.180.78.4 with SMTP id x4mr23412529wiw.19.1346052636942; Mon, 27 Aug 2012 00:30:36 -0700 (PDT) Received: from Laure.box.in.irqsave.net (paradis.irqsave.net. [109.190.18.76]) by mx.google.com with ESMTPS id o2sm20688986wiz.11.2012.08.27.00.30.34 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 27 Aug 2012 00:30:36 -0700 (PDT) From: "=?UTF-8?q?Beno=C3=AEt=20Canet?=" To: qemu-devel@nongnu.org Date: Mon, 27 Aug 2012 09:30:19 +0200 Message-Id: <1346052629-15686-2-git-send-email-benoit@irqsave.net> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1346052629-15686-1-git-send-email-benoit@irqsave.net> References: <1346052629-15686-1-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: 209.85.212.175 Cc: kwolf@redhat.com, stefanha@linux.vnet.ibm.com, blauwirbel@gmail.com, pbonzini@redhat.com, eblake@redhat.com, =?UTF-8?q?Beno=C3=AEt=20Canet?= Subject: [Qemu-devel] =?utf-8?q?=5BRFC_V5_01/11=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 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..65a6b55 --- /dev/null +++ b/block/quorum.c @@ -0,0 +1,45 @@ +/* + * Quorum Block filter + * + * Copyright (C) 2012 Nodalink, SARL. + * + * Author: + * BenoƮt 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; + uint8_t *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; /* individual AIOs */ + QEMUIOVector *qiovs; /* individual IOVs */ + 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; +};