From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54854) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cdgSH-0005XB-AS for qemu-devel@nongnu.org; Tue, 14 Feb 2017 11:59:57 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cdgSC-0003y5-TR for qemu-devel@nongnu.org; Tue, 14 Feb 2017 11:59:53 -0500 Received: from mailhub.sw.ru ([195.214.232.25]:22533 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 1cdgSC-0003vZ-E2 for qemu-devel@nongnu.org; Tue, 14 Feb 2017 11:59:48 -0500 From: Vladimir Sementsov-Ogievskiy Date: Tue, 14 Feb 2017 19:59:30 +0300 Message-Id: <1487091579-67092-17-git-send-email-vsementsov@virtuozzo.com> In-Reply-To: <1487091579-67092-1-git-send-email-vsementsov@virtuozzo.com> References: <1487091579-67092-1-git-send-email-vsementsov@virtuozzo.com> Subject: [Qemu-devel] [PATCH 16/25] qmp: add persistent flag to block-dirty-bitmap-add List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-block@nongnu.org, qemu-devel@nongnu.org Cc: kwolf@redhat.com, mreitz@redhat.com, armbru@redhat.com, eblake@redhat.com, jsnow@redhat.com, famz@redhat.com, den@openvz.org, stefanha@redhat.com, vsementsov@virtuozzo.com, pbonzini@redhat.com 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 --- blockdev.c | 18 +++++++++++++++++- qapi/block-core.json | 8 +++++++- 2 files changed, 24 insertions(+), 2 deletions(-) diff --git a/blockdev.c b/blockdev.c index 245e1e1..40605fa 100644 --- a/blockdev.c +++ b/blockdev.c @@ -1967,6 +1967,7 @@ 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) { @@ -2696,10 +2697,12 @@ 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"); @@ -2725,7 +2728,20 @@ 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 932f5bb..535df20 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1559,10 +1559,16 @@ # @granularity: #optional the bitmap granularity, default is 64k for # block-dirty-bitmap-add # +# @persistent: #optional 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. +# (Since 2.9) +# # 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: -- 1.8.3.1