From patchwork Tue Jan 28 16:52:43 2014 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: 314772 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 23D322C0950 for ; Wed, 29 Jan 2014 03:53:57 +1100 (EST) Received: from localhost ([::1]:38241 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W8Bv5-0004sa-OJ for incoming@patchwork.ozlabs.org; Tue, 28 Jan 2014 11:53:51 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35099) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W8BuM-0004k5-QK for qemu-devel@nongnu.org; Tue, 28 Jan 2014 11:53:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1W8BuF-000124-V5 for qemu-devel@nongnu.org; Tue, 28 Jan 2014 11:53:06 -0500 Received: from paradis.irqsave.net ([62.212.105.220]:48533) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1W8BuF-00011g-K8 for qemu-devel@nongnu.org; Tue, 28 Jan 2014 11:52:59 -0500 Received: from localhost.localdomain (laure.irqsave.net [192.168.77.2]) by paradis.irqsave.net (Postfix) with ESMTP id 3B32F5CED9; Tue, 28 Jan 2014 18:23:33 +0100 (CET) From: =?UTF-8?q?Beno=C3=AEt=20Canet?= To: qemu-devel@nongnu.org Date: Tue, 28 Jan 2014 17:52:43 +0100 Message-Id: <1390927974-31325-3-git-send-email-benoit.canet@irqsave.net> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1390927974-31325-1-git-send-email-benoit.canet@irqsave.net> References: <1390927974-31325-1-git-send-email-benoit.canet@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, mreitz@redhat.com Subject: [Qemu-devel] [PATCH V10 02/13] quorum: Create BDRVQuorumState and BlkDriver and do init. 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 From: Benoît Canet Signed-off-by: Benoit Canet Reviewed-by: Max Reitz --- block/quorum.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/block/quorum.c b/block/quorum.c index 1695f04..0242378 100644 --- a/block/quorum.c +++ b/block/quorum.c @@ -15,6 +15,16 @@ #include "block/block_int.h" +/* the following structure holds the state of one quorum instance */ +typedef struct { + BlockDriverState **bs; /* children BlockDriverStates */ + int total; /* children count */ + int threshold; /* if less than threshold children reads gave the + * same result a quorum error occurs. + */ + bool is_blkverify; /* true if the driver is in blkverify mode */ +} BDRVQuorumState; + typedef struct QuorumAIOCB QuorumAIOCB; /* Quorum will create one instance of the following structure per operation it @@ -37,6 +47,7 @@ typedef struct QuorumSingleAIOCB { */ struct QuorumAIOCB { BlockDriverAIOCB common; + BDRVQuorumState *bqs; /* Request metadata */ uint64_t sector_num; @@ -52,3 +63,17 @@ struct QuorumAIOCB { bool is_read; int vote_ret; }; + +static BlockDriver bdrv_quorum = { + .format_name = "quorum", + .protocol_name = "quorum", + + .instance_size = sizeof(BDRVQuorumState), +}; + +static void bdrv_quorum_init(void) +{ + bdrv_register(&bdrv_quorum); +} + +block_init(bdrv_quorum_init);