From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 30667C04AB4 for ; Fri, 17 May 2019 15:25:54 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E8CE22082E for ; Fri, 17 May 2019 15:25:53 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E8CE22082E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([127.0.0.1]:50156 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hRek5-0005hJ-8D for qemu-devel@archiver.kernel.org; Fri, 17 May 2019 11:25:53 -0400 Received: from eggs.gnu.org ([209.51.188.92]:51902) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1hRefg-0001i5-B8 for qemu-devel@nongnu.org; Fri, 17 May 2019 11:21:21 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hReff-0003eX-0H for qemu-devel@nongnu.org; Fri, 17 May 2019 11:21:20 -0400 Received: from relay.sw.ru ([185.231.240.75]:33968) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hRefe-0003PU-Ou; Fri, 17 May 2019 11:21:18 -0400 Received: from [10.94.3.0] (helo=kvm.qa.sw.ru) by relay.sw.ru with esmtp (Exim 4.91) (envelope-from ) id 1hRefZ-0005qt-Qj; Fri, 17 May 2019 18:21:13 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org, qemu-block@nongnu.org Date: Fri, 17 May 2019 18:21:10 +0300 Message-Id: <20190517152111.206494-2-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190517152111.206494-1-vsementsov@virtuozzo.com> References: <20190517152111.206494-1-vsementsov@virtuozzo.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 185.231.240.75 Subject: [Qemu-devel] [PATCH v2 1/2] qapi: support external bitmaps in block-dirty-bitmap-merge 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, fam@euphon.net, vsementsov@virtuozzo.com, den@virtuozzo.com, armbru@redhat.com, mreitz@redhat.com, jsnow@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Add new optional parameter making possible to merge bitmaps from different nodes. It is needed to maintain external snapshots during incremental backup chain history. Signed-off-by: Vladimir Sementsov-Ogievskiy --- qapi/block-core.json | 22 ++++++++++++++++--- block/dirty-bitmap.c | 9 +++++--- blockdev.c | 50 +++++++++++++++++++++++++++++--------------- 3 files changed, 58 insertions(+), 23 deletions(-) diff --git a/qapi/block-core.json b/qapi/block-core.json index 7ccbfff9d0..dcc935d655 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -2003,19 +2003,35 @@ 'data': { 'node': 'str', 'name': 'str', '*granularity': 'uint32', '*persistent': 'bool', '*autoload': 'bool', '*disabled': 'bool' } } +## +# @BlockDirtyBitmapMergeSource: +# +# @local: name of the bitmap, attached to the same node as target bitmap. +# +# @external: bitmap with specified node +# +# Since: 4.1 +## +{ 'alternate': 'BlockDirtyBitmapMergeSource', + 'data': { 'local': 'str', + 'external': 'BlockDirtyBitmap' } } + ## # @BlockDirtyBitmapMerge: # -# @node: name of device/node which the bitmap is tracking +# @node: name of device/node which the @target bitmap is tracking # # @target: name of the destination dirty bitmap # -# @bitmaps: name(s) of the source dirty bitmap(s) +# @bitmaps: name(s) of the source dirty bitmap(s) at @node and/or fully +# specifed BlockDirtyBitmap elements. The latter are supported +# since 4.1. # # Since: 4.0 ## { 'struct': 'BlockDirtyBitmapMerge', - 'data': { 'node': 'str', 'target': 'str', 'bitmaps': ['str'] } } + 'data': { 'node': 'str', 'target': 'str', + 'bitmaps': ['BlockDirtyBitmapMergeSource'] } } ## # @block-dirty-bitmap-add: diff --git a/block/dirty-bitmap.c b/block/dirty-bitmap.c index 59e6ebb861..49646a30e6 100644 --- a/block/dirty-bitmap.c +++ b/block/dirty-bitmap.c @@ -816,10 +816,10 @@ void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src, { bool ret; - /* only bitmaps from one bds are supported */ - assert(dest->mutex == src->mutex); - qemu_mutex_lock(dest->mutex); + if (src->mutex != dest->mutex) { + qemu_mutex_lock(src->mutex); + } if (bdrv_dirty_bitmap_check(dest, BDRV_BITMAP_DEFAULT, errp)) { goto out; @@ -845,4 +845,7 @@ void bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src, out: qemu_mutex_unlock(dest->mutex); + if (src->mutex != dest->mutex) { + qemu_mutex_unlock(src->mutex); + } } diff --git a/blockdev.c b/blockdev.c index 79fbac8450..64ccef735b 100644 --- a/blockdev.c +++ b/blockdev.c @@ -2112,11 +2112,10 @@ static void block_dirty_bitmap_disable_abort(BlkActionState *common) } } -static BdrvDirtyBitmap *do_block_dirty_bitmap_merge(const char *node, - const char *target, - strList *bitmaps, - HBitmap **backup, - Error **errp); +static BdrvDirtyBitmap *do_block_dirty_bitmap_merge( + const char *node, const char *target, + BlockDirtyBitmapMergeSourceList *bitmaps, + HBitmap **backup, Error **errp); static void block_dirty_bitmap_merge_prepare(BlkActionState *common, Error **errp) @@ -2965,15 +2964,14 @@ void qmp_block_dirty_bitmap_disable(const char *node, const char *name, bdrv_disable_dirty_bitmap(bitmap); } -static BdrvDirtyBitmap *do_block_dirty_bitmap_merge(const char *node, - const char *target, - strList *bitmaps, - HBitmap **backup, - Error **errp) +static BdrvDirtyBitmap *do_block_dirty_bitmap_merge( + const char *node, const char *target, + BlockDirtyBitmapMergeSourceList *bitmaps, + HBitmap **backup, Error **errp) { BlockDriverState *bs; BdrvDirtyBitmap *dst, *src, *anon; - strList *lst; + BlockDirtyBitmapMergeSourceList *lst; Error *local_err = NULL; dst = block_dirty_bitmap_lookup(node, target, &bs, errp); @@ -2988,11 +2986,28 @@ static BdrvDirtyBitmap *do_block_dirty_bitmap_merge(const char *node, } for (lst = bitmaps; lst; lst = lst->next) { - src = bdrv_find_dirty_bitmap(bs, lst->value); - if (!src) { - error_setg(errp, "Dirty bitmap '%s' not found", lst->value); - dst = NULL; - goto out; + switch (lst->value->type) { + const char *name, *node; + case QTYPE_QSTRING: + name = lst->value->u.local; + src = bdrv_find_dirty_bitmap(bs, name); + if (!src) { + error_setg(errp, "Dirty bitmap '%s' not found", name); + dst = NULL; + goto out; + } + break; + case QTYPE_QDICT: + node = lst->value->u.external.node; + name = lst->value->u.external.name; + src = block_dirty_bitmap_lookup(node, name, NULL, errp); + if (!src) { + dst = NULL; + goto out; + } + break; + default: + abort(); } bdrv_merge_dirty_bitmap(anon, src, NULL, &local_err); @@ -3012,7 +3027,8 @@ static BdrvDirtyBitmap *do_block_dirty_bitmap_merge(const char *node, } void qmp_block_dirty_bitmap_merge(const char *node, const char *target, - strList *bitmaps, Error **errp) + BlockDirtyBitmapMergeSourceList *bitmaps, + Error **errp) { do_block_dirty_bitmap_merge(node, target, bitmaps, NULL, errp); } -- 2.18.0