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From 2de41b514449c5ab85a7a0943456a44909122874 Mon Sep 17 00:00:00 2001
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Message-Id: <2de41b514449c5ab85a7a0943456a44909122874@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Tue, 4 Feb 2020 15:07:57 +0100
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Subject: [PATCH] qemu: checkpoint: Extract calculation of bitmap merging for
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checkpoint deletion
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This will allow some testing before refactoring.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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(cherry picked from commit d9dfc1f7de2e54c015504e0a0370e8a89b5e971a)
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https://bugzilla.redhat.com/show_bug.cgi?id=1207659
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Message-Id: <2b3c69597aa8f99af55e30f71d4496b6ae620d31.1580824112.git.pkrempa@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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---
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src/qemu/qemu_checkpoint.c | 72 ++++++++++++++++++++++++--------------
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src/qemu/qemu_checkpoint.h | 7 ++++
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2 files changed, 53 insertions(+), 26 deletions(-)
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diff --git a/src/qemu/qemu_checkpoint.c b/src/qemu/qemu_checkpoint.c
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index 1100f6e744..e75cdd0458 100644
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--- a/src/qemu/qemu_checkpoint.c
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+++ b/src/qemu/qemu_checkpoint.c
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@@ -148,6 +148,46 @@ qemuCheckpointFindActiveDiskInParent(virDomainObjPtr vm,
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}
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+int
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+qemuCheckpointDiscardDiskBitmaps(virStorageSourcePtr src,
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+ const char *delbitmap,
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+ const char *parentbitmap,
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+ bool chkcurrent,
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+ virJSONValuePtr actions)
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+{
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+ if (parentbitmap) {
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+ g_autoptr(virJSONValue) arr = NULL;
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+
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+ if (!(arr = virJSONValueNewArray()))
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+ return -1;
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+
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+ if (qemuMonitorTransactionBitmapMergeSourceAddBitmap(arr,
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+ src->nodeformat,
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+ delbitmap) < 0)
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+ return -1;
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+
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+ if (chkcurrent) {
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+ if (qemuMonitorTransactionBitmapEnable(actions,
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+ src->nodeformat,
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+ parentbitmap) < 0)
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+ return -1;
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+ }
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+
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+ if (qemuMonitorTransactionBitmapMerge(actions,
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+ src->nodeformat,
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+ parentbitmap, &arr) < 0)
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+ return -1;
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+ }
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+
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+ if (qemuMonitorTransactionBitmapRemove(actions,
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+ src->nodeformat,
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+ delbitmap) < 0)
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+ return -1;
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+
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+ return 0;
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+}
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+
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+
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static int
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qemuCheckpointDiscardBitmaps(virDomainObjPtr vm,
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virDomainCheckpointDefPtr chkdef,
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@@ -167,6 +207,7 @@ qemuCheckpointDiscardBitmaps(virDomainObjPtr vm,
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virDomainCheckpointDiskDef *chkdisk = &chkdef->disks[i];
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virDomainDiskDefPtr domdisk = virDomainDiskByTarget(vm->def, chkdisk->name);
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virDomainCheckpointDiskDef *parentchkdisk = NULL;
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+ const char *parentbitmap = NULL;
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/* domdisk can be missing e.g. when it was unplugged */
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if (!domdisk)
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@@ -178,33 +219,12 @@ qemuCheckpointDiscardBitmaps(virDomainObjPtr vm,
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/* If any ancestor checkpoint has a bitmap for the same
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* disk, then this bitmap must be merged to the
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* ancestor. */
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- if ((parentchkdisk = qemuCheckpointFindActiveDiskInParent(vm, parent, chkdisk->name))) {
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- g_autoptr(virJSONValue) arr = NULL;
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+ if ((parentchkdisk = qemuCheckpointFindActiveDiskInParent(vm, parent,
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+ chkdisk->name)))
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+ parentbitmap = parentchkdisk->name;
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- if (!(arr = virJSONValueNewArray()))
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- return -1;
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-
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- if (qemuMonitorTransactionBitmapMergeSourceAddBitmap(arr,
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- domdisk->src->nodeformat,
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- chkdisk->bitmap) < 0)
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- return -1;
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-
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- if (chkcurrent) {
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- if (qemuMonitorTransactionBitmapEnable(actions,
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- domdisk->src->nodeformat,
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- parentchkdisk->bitmap) < 0)
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- return -1;
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- }
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-
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- if (qemuMonitorTransactionBitmapMerge(actions,
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- domdisk->src->nodeformat,
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- parentchkdisk->bitmap, &arr) < 0)
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- return -1;
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- }
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-
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- if (qemuMonitorTransactionBitmapRemove(actions,
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- domdisk->src->nodeformat,
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- chkdisk->bitmap) < 0)
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+ if (qemuCheckpointDiscardDiskBitmaps(domdisk->src, chkdisk->bitmap,
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+ parentbitmap, chkcurrent, actions) < 0)
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return -1;
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}
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diff --git a/src/qemu/qemu_checkpoint.h b/src/qemu/qemu_checkpoint.h
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index eb85611ea6..85fd453d50 100644
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--- a/src/qemu/qemu_checkpoint.h
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+++ b/src/qemu/qemu_checkpoint.h
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@@ -71,3 +71,10 @@ qemuCheckpointCreateFinalize(virQEMUDriverPtr driver,
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void
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qemuCheckpointRollbackMetadata(virDomainObjPtr vm,
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virDomainMomentObjPtr chk);
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+
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+int
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+qemuCheckpointDiscardDiskBitmaps(virStorageSourcePtr src,
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+ const char *delbitmap,
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+ const char *parentbitmap,
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+ bool chkcurrent,
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+ virJSONValuePtr actions);
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--
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2.25.0
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