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From 97a6adcb3ac735ff135469aa602c798fbc0b1491 Mon Sep 17 00:00:00 2001
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Message-Id: <97a6adcb3ac735ff135469aa602c798fbc0b1491@dist-git>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Tue, 23 Jun 2020 12:23:36 +0200
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Subject: [PATCH] qemu: backup: Fix backup of disk skipped in an intermediate
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checkpoint
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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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If a disk is not captured by one of the intermediate checkpoints the
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code would fail, but we can easily calculate the bitmaps to merge
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correctly by skipping over checkpoints which don't describe the disk.
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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 c89a44777fdf89b400878adcb03a3557bcec3f4e)
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https://bugzilla.redhat.com/show_bug.cgi?id=1804593
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Message-Id: <d0efe760e9f8049758691b7f66a7de41fce5c264.1592906423.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_backup.c | 24 ++++++++++++++++++++++++
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tests/qemublocktest.c | 6 ++++++
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2 files changed, 30 insertions(+)
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diff --git a/src/qemu/qemu_backup.c b/src/qemu/qemu_backup.c
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index 400b711f79..adbf696de6 100644
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--- a/src/qemu/qemu_backup.c
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+++ b/src/qemu/qemu_backup.c
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@@ -240,6 +240,30 @@ qemuBackupDiskPrepareOneBitmapsChain(virDomainMomentDefPtr *incremental,
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for (incridx = 0; incremental[incridx]; incridx++) {
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g_autoptr(virJSONValue) tmp = virJSONValueNewArray();
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virStorageSourcePtr tmpsrc = NULL;
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+ virDomainCheckpointDefPtr chkdef = (virDomainCheckpointDefPtr) incremental[incridx];
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+ bool checkpoint_has_disk = false;
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+ size_t i;
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+
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+ for (i = 0; i < chkdef->ndisks; i++) {
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+ if (STRNEQ_NULLABLE(diskdst, chkdef->disks[i].name))
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+ continue;
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+
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+ if (chkdef->disks[i].type == VIR_DOMAIN_CHECKPOINT_TYPE_BITMAP)
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+ checkpoint_has_disk = true;
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+
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+ break;
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+ }
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+
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+ if (!checkpoint_has_disk) {
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+ if (!incremental[incridx + 1]) {
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+ virReportError(VIR_ERR_INVALID_ARG,
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+ _("disk '%s' not found in checkpoint '%s'"),
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+ diskdst, incremental[incridx]->name);
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+ return NULL;
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+ }
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+
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+ continue;
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+ }
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if (qemuBackupGetBitmapMergeRange(n, incremental[incridx]->name,
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&tmp, &tmpsrc, diskdst,
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diff --git a/tests/qemublocktest.c b/tests/qemublocktest.c
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index e461b3a23d..d15965d9eb 100644
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--- a/tests/qemublocktest.c
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+++ b/tests/qemublocktest.c
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@@ -727,6 +727,12 @@ testQemuBackupGetIncrementalMoment(const char *name)
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if (!(checkpoint = virDomainCheckpointDefNew()))
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abort();
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+ checkpoint->disks = g_new0(virDomainCheckpointDiskDef, 1);
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+ checkpoint->ndisks = 1;
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+
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+ checkpoint->disks[0].name = g_strdup("testdisk");
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+ checkpoint->disks[0].type = VIR_DOMAIN_CHECKPOINT_TYPE_BITMAP;
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+
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checkpoint->parent.name = g_strdup(name);
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return (virDomainMomentDefPtr) checkpoint;
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--
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2.27.0
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