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Blame SOURCES/kvm-blockdev-Split-off-basic-bitmap-operations-for-qemu-.patch

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From 2afa718d59ef86879a9e34b4601a1f2658afa9ba Mon Sep 17 00:00:00 2001
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From: Eric Blake <eblake@redhat.com>
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Date: Tue, 2 Jun 2020 02:34:14 +0100
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Subject: [PATCH 09/26] blockdev: Split off basic bitmap operations for
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 qemu-img
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RH-Author: Eric Blake <eblake@redhat.com>
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Message-id: <20200602023420.2133649-7-eblake@redhat.com>
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Patchwork-id: 97073
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O-Subject: [RHEL-AV-8.2.1 qemu-kvm PATCH 06/12] blockdev: Split off basic bitmap operations for qemu-img
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Bugzilla: 1779893 1779904
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Max Reitz <mreitz@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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Upcoming patches want to add some basic bitmap manipulation abilities
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to qemu-img.  But blockdev.o is too heavyweight to link into qemu-img
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(among other things, it would drag in block jobs and transaction
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support - qemu-img does offline manipulation, where atomicity is less
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important because there are no concurrent modifications to compete
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with), so it's time to split off the bare bones of what we will need
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into a new file block/monitor/bitmap-qmp-cmds.o.
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This is sufficient to expose 6 QMP commands for use by qemu-img (add,
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remove, clear, enable, disable, merge), as well as move the three
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helper functions touched in the previous patch.  Regarding
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MAINTAINERS, the new file is automatically part of block core, but
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also makes sense as related to other dirty bitmap files.
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Signed-off-by: Eric Blake <eblake@redhat.com>
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Reviewed-by: Max Reitz <mreitz@redhat.com>
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Message-Id: <20200513011648.166876-6-eblake@redhat.com>
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Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
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(cherry picked from commit bb4e58c6137e80129b955789dd4b66c1504f20dc)
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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Conflicts:
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	Makefile.objs - comment context
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	block/monitor/Makefile.objs - context: a2dde2f2 not backported
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	blockdev.c - context
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Signed-off-by: Eric Blake <eblake@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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 MAINTAINERS                     |   1 +
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 Makefile.objs                   |   3 +-
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 block/monitor/Makefile.objs     |   1 +
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 block/monitor/bitmap-qmp-cmds.c | 321 ++++++++++++++++++++++++++++++++++++++++
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 blockdev.c                      | 284 -----------------------------------
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 5 files changed, 324 insertions(+), 286 deletions(-)
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 create mode 100644 block/monitor/Makefile.objs
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 create mode 100644 block/monitor/bitmap-qmp-cmds.c
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diff --git a/MAINTAINERS b/MAINTAINERS
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index 3a81ac9..49d5d44 100644
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--- a/MAINTAINERS
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+++ b/MAINTAINERS
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@@ -1875,6 +1875,7 @@ L: qemu-block@nongnu.org
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 S: Supported
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 F: include/qemu/hbitmap.h
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 F: include/block/dirty-bitmap.h
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+F: block/monitor/bitmap-qmp-cmds.c
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 F: block/dirty-bitmap.c
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 F: block/qcow2-bitmap.c
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 F: migration/block-dirty-bitmap.c
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diff --git a/Makefile.objs b/Makefile.objs
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index 1a8f288..7404ef0 100644
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--- a/Makefile.objs
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+++ b/Makefile.objs
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@@ -13,9 +13,8 @@ authz-obj-y = authz/
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 #######################################################################
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 # block-obj-y is code used by both qemu system emulation and qemu-img
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-block-obj-y = nbd/
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+block-obj-y = block/ block/monitor/ nbd/ scsi/
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 block-obj-y += block.o blockjob.o job.o
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-block-obj-y += block/ scsi/
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 block-obj-y += qemu-io-cmds.o
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 block-obj-$(CONFIG_REPLICATION) += replication.o
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diff --git a/block/monitor/Makefile.objs b/block/monitor/Makefile.objs
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new file mode 100644
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index 0000000..f0c7642
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--- /dev/null
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+++ b/block/monitor/Makefile.objs
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@@ -0,0 +1 @@
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+block-obj-y += bitmap-qmp-cmds.o
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diff --git a/block/monitor/bitmap-qmp-cmds.c b/block/monitor/bitmap-qmp-cmds.c
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new file mode 100644
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index 0000000..9f11dee
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--- /dev/null
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+++ b/block/monitor/bitmap-qmp-cmds.c
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@@ -0,0 +1,321 @@
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+/*
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+ * QEMU block dirty bitmap QMP commands
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+ *
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+ * Copyright (c) 2003-2008 Fabrice Bellard
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+ *
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+ * This work is licensed under the terms of the GNU GPL, version 2 or
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+ * later.  See the COPYING file in the top-level directory.
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+ *
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+ * This file incorporates work covered by the following copyright and
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+ * permission notice:
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+ *
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+ * Copyright (c) 2003-2008 Fabrice Bellard
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+ *
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+ * Permission is hereby granted, free of charge, to any person obtaining a copy
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+ * of this software and associated documentation files (the "Software"), to deal
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+ * in the Software without restriction, including without limitation the rights
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+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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+ * copies of the Software, and to permit persons to whom the Software is
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+ * furnished to do so, subject to the following conditions:
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+ *
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+ * The above copyright notice and this permission notice shall be included in
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+ * all copies or substantial portions of the Software.
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+ *
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+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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+ * THE SOFTWARE.
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+ */
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+
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+#include "qemu/osdep.h"
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+
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+#include "block/block_int.h"
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+#include "qapi/qapi-commands-block.h"
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+#include "qapi/error.h"
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+
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+/**
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+ * block_dirty_bitmap_lookup:
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+ * Return a dirty bitmap (if present), after validating
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+ * the node reference and bitmap names.
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+ *
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+ * @node: The name of the BDS node to search for bitmaps
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+ * @name: The name of the bitmap to search for
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+ * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
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+ * @errp: Output pointer for error information. Can be NULL.
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+ *
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+ * @return: A bitmap object on success, or NULL on failure.
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+ */
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+BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
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+                                           const char *name,
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+                                           BlockDriverState **pbs,
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+                                           Error **errp)
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+{
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+    BlockDriverState *bs;
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+    BdrvDirtyBitmap *bitmap;
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+
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+    if (!node) {
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+        error_setg(errp, "Node cannot be NULL");
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+        return NULL;
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+    }
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+    if (!name) {
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+        error_setg(errp, "Bitmap name cannot be NULL");
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+        return NULL;
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+    }
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+    bs = bdrv_lookup_bs(node, node, NULL);
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+    if (!bs) {
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+        error_setg(errp, "Node '%s' not found", node);
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+        return NULL;
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+    }
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+
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+    bitmap = bdrv_find_dirty_bitmap(bs, name);
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+    if (!bitmap) {
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+        error_setg(errp, "Dirty bitmap '%s' not found", name);
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+        return NULL;
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+    }
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+
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+    if (pbs) {
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+        *pbs = bs;
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+    }
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+
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+    return bitmap;
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+}
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+
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+void qmp_block_dirty_bitmap_add(const char *node, const char *name,
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+                                bool has_granularity, uint32_t granularity,
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+                                bool has_persistent, bool persistent,
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+                                bool has_disabled, bool disabled,
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+                                Error **errp)
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+{
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+    BlockDriverState *bs;
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+    BdrvDirtyBitmap *bitmap;
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+    AioContext *aio_context;
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+
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+    if (!name || name[0] == '\0') {
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+        error_setg(errp, "Bitmap name cannot be empty");
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+        return;
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+    }
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+
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+    bs = bdrv_lookup_bs(node, node, errp);
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+    if (!bs) {
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+        return;
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+    }
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+
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+    aio_context = bdrv_get_aio_context(bs);
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+    aio_context_acquire(aio_context);
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+
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+    if (has_granularity) {
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+        if (granularity < 512 || !is_power_of_2(granularity)) {
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+            error_setg(errp, "Granularity must be power of 2 "
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+                             "and at least 512");
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+            goto out;
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+        }
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+    } else {
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+        /* Default to cluster size, if available: */
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+        granularity = bdrv_get_default_bitmap_granularity(bs);
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+    }
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+
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+    if (!has_persistent) {
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+        persistent = false;
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+    }
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+
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+    if (!has_disabled) {
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+        disabled = false;
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+    }
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+
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+    if (persistent &&
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+        !bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp))
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+    {
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+        goto out;
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+    }
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+
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+    bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp);
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+    if (bitmap == NULL) {
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+        goto out;
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+    }
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+
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+    if (disabled) {
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+        bdrv_disable_dirty_bitmap(bitmap);
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+    }
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+
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+    bdrv_dirty_bitmap_set_persistence(bitmap, persistent);
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+
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+out:
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+    aio_context_release(aio_context);
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+}
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+
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+BdrvDirtyBitmap *block_dirty_bitmap_remove(const char *node, const char *name,
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+                                           bool release,
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+                                           BlockDriverState **bitmap_bs,
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+                                           Error **errp)
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+{
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+    BlockDriverState *bs;
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+    BdrvDirtyBitmap *bitmap;
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+    AioContext *aio_context;
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+
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+    bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
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+    if (!bitmap || !bs) {
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+        return NULL;
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+    }
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+
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+    aio_context = bdrv_get_aio_context(bs);
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+    aio_context_acquire(aio_context);
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+
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+    if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_BUSY | BDRV_BITMAP_RO,
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+                                errp)) {
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+        aio_context_release(aio_context);
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+        return NULL;
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+    }
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+
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+    if (bdrv_dirty_bitmap_get_persistence(bitmap) &&
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+        bdrv_remove_persistent_dirty_bitmap(bs, name, errp) < 0)
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+    {
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+        aio_context_release(aio_context);
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+        return NULL;
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+    }
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+
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+    if (release) {
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+        bdrv_release_dirty_bitmap(bitmap);
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+    }
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+
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+    if (bitmap_bs) {
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+        *bitmap_bs = bs;
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+    }
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+
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+    aio_context_release(aio_context);
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+    return release ? NULL : bitmap;
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+}
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+
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+void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
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+                                   Error **errp)
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+{
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+    block_dirty_bitmap_remove(node, name, true, NULL, errp);
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+}
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+
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+/**
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+ * Completely clear a bitmap, for the purposes of synchronizing a bitmap
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+ * immediately after a full backup operation.
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+ */
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+void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
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+                                  Error **errp)
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+{
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+    BdrvDirtyBitmap *bitmap;
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+    BlockDriverState *bs;
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+
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+    bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
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+    if (!bitmap || !bs) {
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+        return;
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+    }
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+
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+    if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_DEFAULT, errp)) {
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+        return;
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+    }
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+
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+    bdrv_clear_dirty_bitmap(bitmap, NULL);
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+}
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+
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+void qmp_block_dirty_bitmap_enable(const char *node, const char *name,
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+                                   Error **errp)
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+{
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+    BlockDriverState *bs;
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+    BdrvDirtyBitmap *bitmap;
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+
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+    bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
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+    if (!bitmap) {
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+        return;
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+    }
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+
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+    if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
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+        return;
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+    }
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+
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+    bdrv_enable_dirty_bitmap(bitmap);
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+}
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+
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+void qmp_block_dirty_bitmap_disable(const char *node, const char *name,
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+                                    Error **errp)
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+{
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+    BlockDriverState *bs;
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+    BdrvDirtyBitmap *bitmap;
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+
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+    bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
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+    if (!bitmap) {
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+        return;
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+    }
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+
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+    if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
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+        return;
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+    }
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+
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+    bdrv_disable_dirty_bitmap(bitmap);
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+}
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+
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+BdrvDirtyBitmap *block_dirty_bitmap_merge(const char *node, const char *target,
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+                                          BlockDirtyBitmapMergeSourceList *bms,
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+                                          HBitmap **backup, Error **errp)
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+{
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+    BlockDriverState *bs;
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+    BdrvDirtyBitmap *dst, *src, *anon;
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+    BlockDirtyBitmapMergeSourceList *lst;
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+    Error *local_err = NULL;
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+
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+    dst = block_dirty_bitmap_lookup(node, target, &bs, errp);
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+    if (!dst) {
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+        return NULL;
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+    }
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+
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+    anon = bdrv_create_dirty_bitmap(bs, bdrv_dirty_bitmap_granularity(dst),
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+                                    NULL, errp);
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+    if (!anon) {
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+        return NULL;
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+    }
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+
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+    for (lst = bms; lst; lst = lst->next) {
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+        switch (lst->value->type) {
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+            const char *name, *node;
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+        case QTYPE_QSTRING:
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+            name = lst->value->u.local;
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+            src = bdrv_find_dirty_bitmap(bs, name);
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+            if (!src) {
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+                error_setg(errp, "Dirty bitmap '%s' not found", name);
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+                dst = NULL;
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+                goto out;
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+            }
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+            break;
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+        case QTYPE_QDICT:
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+            node = lst->value->u.external.node;
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+            name = lst->value->u.external.name;
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+            src = block_dirty_bitmap_lookup(node, name, NULL, errp);
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+            if (!src) {
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+                dst = NULL;
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+                goto out;
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+            }
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+            break;
902636
+        default:
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+            abort();
902636
+        }
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+
902636
+        bdrv_merge_dirty_bitmap(anon, src, NULL, &local_err);
902636
+        if (local_err) {
902636
+            error_propagate(errp, local_err);
902636
+            dst = NULL;
902636
+            goto out;
902636
+        }
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+    }
902636
+
902636
+    /* Merge into dst; dst is unchanged on failure. */
902636
+    bdrv_merge_dirty_bitmap(dst, anon, backup, errp);
902636
+
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+ out:
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+    bdrv_release_dirty_bitmap(anon);
902636
+    return dst;
902636
+}
902636
+
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+void qmp_block_dirty_bitmap_merge(const char *node, const char *target,
902636
+                                  BlockDirtyBitmapMergeSourceList *bitmaps,
902636
+                                  Error **errp)
902636
+{
902636
+    block_dirty_bitmap_merge(node, target, bitmaps, NULL, errp);
902636
+}
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diff --git a/blockdev.c b/blockdev.c
902636
index 3958058..5128c9b 100644
902636
--- a/blockdev.c
902636
+++ b/blockdev.c
902636
@@ -1250,53 +1250,6 @@ out_aio_context:
902636
     return NULL;
902636
 }
902636
 
902636
-/**
902636
- * block_dirty_bitmap_lookup:
902636
- * Return a dirty bitmap (if present), after validating
902636
- * the node reference and bitmap names.
902636
- *
902636
- * @node: The name of the BDS node to search for bitmaps
902636
- * @name: The name of the bitmap to search for
902636
- * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
902636
- * @errp: Output pointer for error information. Can be NULL.
902636
- *
902636
- * @return: A bitmap object on success, or NULL on failure.
902636
- */
902636
-BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
902636
-                                           const char *name,
902636
-                                           BlockDriverState **pbs,
902636
-                                           Error **errp)
902636
-{
902636
-    BlockDriverState *bs;
902636
-    BdrvDirtyBitmap *bitmap;
902636
-
902636
-    if (!node) {
902636
-        error_setg(errp, "Node cannot be NULL");
902636
-        return NULL;
902636
-    }
902636
-    if (!name) {
902636
-        error_setg(errp, "Bitmap name cannot be NULL");
902636
-        return NULL;
902636
-    }
902636
-    bs = bdrv_lookup_bs(node, node, NULL);
902636
-    if (!bs) {
902636
-        error_setg(errp, "Node '%s' not found", node);
902636
-        return NULL;
902636
-    }
902636
-
902636
-    bitmap = bdrv_find_dirty_bitmap(bs, name);
902636
-    if (!bitmap) {
902636
-        error_setg(errp, "Dirty bitmap '%s' not found", name);
902636
-        return NULL;
902636
-    }
902636
-
902636
-    if (pbs) {
902636
-        *pbs = bs;
902636
-    }
902636
-
902636
-    return bitmap;
902636
-}
902636
-
902636
 /* New and old BlockDriverState structs for atomic group operations */
902636
 
902636
 typedef struct BlkActionState BlkActionState;
902636
@@ -2974,243 +2927,6 @@ out:
902636
     aio_context_release(aio_context);
902636
 }
902636
 
902636
-void qmp_block_dirty_bitmap_add(const char *node, const char *name,
902636
-                                bool has_granularity, uint32_t granularity,
902636
-                                bool has_persistent, bool persistent,
902636
-                                bool has_disabled, bool disabled,
902636
-                                Error **errp)
902636
-{
902636
-    BlockDriverState *bs;
902636
-    BdrvDirtyBitmap *bitmap;
902636
-    AioContext *aio_context;
902636
-
902636
-    if (!name || name[0] == '\0') {
902636
-        error_setg(errp, "Bitmap name cannot be empty");
902636
-        return;
902636
-    }
902636
-
902636
-    bs = bdrv_lookup_bs(node, node, errp);
902636
-    if (!bs) {
902636
-        return;
902636
-    }
902636
-
902636
-    aio_context = bdrv_get_aio_context(bs);
902636
-    aio_context_acquire(aio_context);
902636
-
902636
-    if (has_granularity) {
902636
-        if (granularity < 512 || !is_power_of_2(granularity)) {
902636
-            error_setg(errp, "Granularity must be power of 2 "
902636
-                             "and at least 512");
902636
-            goto out;
902636
-        }
902636
-    } else {
902636
-        /* Default to cluster size, if available: */
902636
-        granularity = bdrv_get_default_bitmap_granularity(bs);
902636
-    }
902636
-
902636
-    if (!has_persistent) {
902636
-        persistent = false;
902636
-    }
902636
-
902636
-    if (!has_disabled) {
902636
-        disabled = false;
902636
-    }
902636
-
902636
-    if (persistent &&
902636
-        !bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp))
902636
-    {
902636
-        goto out;
902636
-    }
902636
-
902636
-    bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp);
902636
-    if (bitmap == NULL) {
902636
-        goto out;
902636
-    }
902636
-
902636
-    if (disabled) {
902636
-        bdrv_disable_dirty_bitmap(bitmap);
902636
-    }
902636
-
902636
-    bdrv_dirty_bitmap_set_persistence(bitmap, persistent);
902636
-
902636
-out:
902636
-    aio_context_release(aio_context);
902636
-}
902636
-
902636
-BdrvDirtyBitmap *block_dirty_bitmap_remove(const char *node, const char *name,
902636
-                                           bool release,
902636
-                                           BlockDriverState **bitmap_bs,
902636
-                                           Error **errp)
902636
-{
902636
-    BlockDriverState *bs;
902636
-    BdrvDirtyBitmap *bitmap;
902636
-    AioContext *aio_context;
902636
-
902636
-    bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
902636
-    if (!bitmap || !bs) {
902636
-        return NULL;
902636
-    }
902636
-
902636
-    aio_context = bdrv_get_aio_context(bs);
902636
-    aio_context_acquire(aio_context);
902636
-
902636
-    if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_BUSY | BDRV_BITMAP_RO,
902636
-                                errp)) {
902636
-        aio_context_release(aio_context);
902636
-        return NULL;
902636
-    }
902636
-
902636
-    if (bdrv_dirty_bitmap_get_persistence(bitmap) &&
902636
-        bdrv_remove_persistent_dirty_bitmap(bs, name, errp) < 0)
902636
-    {
902636
-        aio_context_release(aio_context);
902636
-        return NULL;
902636
-    }
902636
-
902636
-    if (release) {
902636
-        bdrv_release_dirty_bitmap(bitmap);
902636
-    }
902636
-
902636
-    if (bitmap_bs) {
902636
-        *bitmap_bs = bs;
902636
-    }
902636
-
902636
-    aio_context_release(aio_context);
902636
-    return release ? NULL : bitmap;
902636
-}
902636
-
902636
-void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
902636
-                                   Error **errp)
902636
-{
902636
-    block_dirty_bitmap_remove(node, name, true, NULL, errp);
902636
-}
902636
-
902636
-/**
902636
- * Completely clear a bitmap, for the purposes of synchronizing a bitmap
902636
- * immediately after a full backup operation.
902636
- */
902636
-void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
902636
-                                  Error **errp)
902636
-{
902636
-    BdrvDirtyBitmap *bitmap;
902636
-    BlockDriverState *bs;
902636
-
902636
-    bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
902636
-    if (!bitmap || !bs) {
902636
-        return;
902636
-    }
902636
-
902636
-    if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_DEFAULT, errp)) {
902636
-        return;
902636
-    }
902636
-
902636
-    bdrv_clear_dirty_bitmap(bitmap, NULL);
902636
-}
902636
-
902636
-void qmp_block_dirty_bitmap_enable(const char *node, const char *name,
902636
-                                   Error **errp)
902636
-{
902636
-    BlockDriverState *bs;
902636
-    BdrvDirtyBitmap *bitmap;
902636
-
902636
-    bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
902636
-    if (!bitmap) {
902636
-        return;
902636
-    }
902636
-
902636
-    if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
902636
-        return;
902636
-    }
902636
-
902636
-    bdrv_enable_dirty_bitmap(bitmap);
902636
-}
902636
-
902636
-void qmp_block_dirty_bitmap_disable(const char *node, const char *name,
902636
-                                    Error **errp)
902636
-{
902636
-    BlockDriverState *bs;
902636
-    BdrvDirtyBitmap *bitmap;
902636
-
902636
-    bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
902636
-    if (!bitmap) {
902636
-        return;
902636
-    }
902636
-
902636
-    if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
902636
-        return;
902636
-    }
902636
-
902636
-    bdrv_disable_dirty_bitmap(bitmap);
902636
-}
902636
-
902636
-BdrvDirtyBitmap *block_dirty_bitmap_merge(const char *node, const char *target,
902636
-                                          BlockDirtyBitmapMergeSourceList *bms,
902636
-                                          HBitmap **backup, Error **errp)
902636
-{
902636
-    BlockDriverState *bs;
902636
-    BdrvDirtyBitmap *dst, *src, *anon;
902636
-    BlockDirtyBitmapMergeSourceList *lst;
902636
-    Error *local_err = NULL;
902636
-
902636
-    dst = block_dirty_bitmap_lookup(node, target, &bs, errp);
902636
-    if (!dst) {
902636
-        return NULL;
902636
-    }
902636
-
902636
-    anon = bdrv_create_dirty_bitmap(bs, bdrv_dirty_bitmap_granularity(dst),
902636
-                                    NULL, errp);
902636
-    if (!anon) {
902636
-        return NULL;
902636
-    }
902636
-
902636
-    for (lst = bms; lst; lst = lst->next) {
902636
-        switch (lst->value->type) {
902636
-            const char *name, *node;
902636
-        case QTYPE_QSTRING:
902636
-            name = lst->value->u.local;
902636
-            src = bdrv_find_dirty_bitmap(bs, name);
902636
-            if (!src) {
902636
-                error_setg(errp, "Dirty bitmap '%s' not found", name);
902636
-                dst = NULL;
902636
-                goto out;
902636
-            }
902636
-            break;
902636
-        case QTYPE_QDICT:
902636
-            node = lst->value->u.external.node;
902636
-            name = lst->value->u.external.name;
902636
-            src = block_dirty_bitmap_lookup(node, name, NULL, errp);
902636
-            if (!src) {
902636
-                dst = NULL;
902636
-                goto out;
902636
-            }
902636
-            break;
902636
-        default:
902636
-            abort();
902636
-        }
902636
-
902636
-        bdrv_merge_dirty_bitmap(anon, src, NULL, &local_err);
902636
-        if (local_err) {
902636
-            error_propagate(errp, local_err);
902636
-            dst = NULL;
902636
-            goto out;
902636
-        }
902636
-    }
902636
-
902636
-    /* Merge into dst; dst is unchanged on failure. */
902636
-    bdrv_merge_dirty_bitmap(dst, anon, backup, errp);
902636
-
902636
- out:
902636
-    bdrv_release_dirty_bitmap(anon);
902636
-    return dst;
902636
-}
902636
-
902636
-void qmp_block_dirty_bitmap_merge(const char *node, const char *target,
902636
-                                  BlockDirtyBitmapMergeSourceList *bitmaps,
902636
-                                  Error **errp)
902636
-{
902636
-    block_dirty_bitmap_merge(node, target, bitmaps, NULL, errp);
902636
-}
902636
-
902636
 BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node,
902636
                                                               const char *name,
902636
                                                               Error **errp)
902636
-- 
902636
1.8.3.1
902636