From patchwork Tue Jun 13 14:03:51 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Sementsov-Ogievskiy X-Patchwork-Id: 775261 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 3wnBw24TNLz9s8N for ; Wed, 14 Jun 2017 00:28:50 +1000 (AEST) Received: from localhost ([::1]:43586 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dKmoK-0002nI-CI for incoming@patchwork.ozlabs.org; Tue, 13 Jun 2017 10:28:48 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59881) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dKmQa-0001pp-QF for qemu-devel@nongnu.org; Tue, 13 Jun 2017 10:04:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dKmQS-0005LS-C8 for qemu-devel@nongnu.org; Tue, 13 Jun 2017 10:04:16 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:29578 helo=relay.sw.ru) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dKmQS-0005II-0M for qemu-devel@nongnu.org; Tue, 13 Jun 2017 10:04:08 -0400 Received: from kvm.sw.ru (msk-vpn.virtuozzo.com [195.214.232.6]) by relay.sw.ru (8.13.4/8.13.4) with ESMTP id v5DE3wrC032717; Tue, 13 Jun 2017 17:04:01 +0300 (MSK) From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org, qemu-devel@nongnu.org Date: Tue, 13 Jun 2017 17:03:51 +0300 Message-Id: <20170613140358.81651-24-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.11.1 In-Reply-To: <20170613140358.81651-1-vsementsov@virtuozzo.com> References: <20170613140358.81651-1-vsementsov@virtuozzo.com> X-detected-operating-system: by eggs.gnu.org: OpenBSD 3.x [fuzzy] X-Received-From: 195.214.232.25 Subject: [Qemu-devel] [PATCH v21 23/30] qmp: add persistent flag to block-dirty-bitmap-add X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, vsementsov@virtuozzo.com, famz@redhat.com, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, pbonzini@redhat.com, den@openvz.org, jsnow@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Add optional 'persistent' flag to qmp command block-dirty-bitmap-add. Default is false. Signed-off-by: Vladimir Sementsov-Ogievskiy Signed-off-by: Denis V. Lunev Reviewed-by: Max Reitz Reviewed-by: John Snow --- blockdev.c | 18 +++++++++++++++++- qapi/block-core.json | 8 +++++++- 2 files changed, 24 insertions(+), 2 deletions(-) diff --git a/blockdev.c b/blockdev.c index 2b397abf66..12ee9a3eda 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1982,6 +1982,7 @@ static void block_dirty_bitmap_add_prepare(BlkActionState *common, /* AIO context taken and released within qmp_block_dirty_bitmap_add */ qmp_block_dirty_bitmap_add(action->node, action->name, action->has_granularity, action->granularity, + action->has_persistent, action->persistent, &local_err); if (!local_err) { @@ -2730,10 +2731,12 @@ out: void qmp_block_dirty_bitmap_add(const char *node, const char *name, bool has_granularity, uint32_t granularity, + bool has_persistent, bool persistent, Error **errp) { AioContext *aio_context; BlockDriverState *bs; + BdrvDirtyBitmap *bitmap; if (!name || name[0] == '\0') { error_setg(errp, "Bitmap name cannot be empty"); @@ -2759,7 +2762,20 @@ void qmp_block_dirty_bitmap_add(const char *node, const char *name, granularity = bdrv_get_default_bitmap_granularity(bs); } - bdrv_create_dirty_bitmap(bs, granularity, name, errp); + if (!has_persistent) { + persistent = false; + } + + if (persistent && + !bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp)) + { + goto out; + } + + bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp); + if (bitmap != NULL) { + bdrv_dirty_bitmap_set_persistance(bitmap, persistent); + } out: aio_context_release(aio_context); diff --git a/qapi/block-core.json b/qapi/block-core.json index ea0b3e8b13..5d9ed0e208 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1560,10 +1560,16 @@ # @granularity: the bitmap granularity, default is 64k for # block-dirty-bitmap-add # +# @persistent: the bitmap is persistent, i.e. it will be saved to the +# corresponding block device image file on its close. For now only +# Qcow2 disks support persistent bitmaps. Default is false for +# block-dirty-bitmap-add. (Since: 2.10) +# # Since: 2.4 ## { 'struct': 'BlockDirtyBitmapAdd', - 'data': { 'node': 'str', 'name': 'str', '*granularity': 'uint32' } } + 'data': { 'node': 'str', 'name': 'str', '*granularity': 'uint32', + '*persistent': 'bool' } } ## # @block-dirty-bitmap-add: