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68 lines
2.7 KiB
68 lines
2.7 KiB
From b99fb51812da73df754151c59c259d15fa654168 Mon Sep 17 00:00:00 2001
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Message-ID: <b99fb51812da73df754151c59c259d15fa654168.1770203422.git.jdenemar@redhat.com>
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Tue, 27 Jan 2026 19:22:08 +0100
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Subject: [PATCH] qemuMigrationDstPrepareAnyBlockDirtyBitmaps: Fix check for
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existing bitmaps
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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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On incoming migration qemu doesn't load bitmaps into memory (which makes
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them available under the 'dirty-bitmaps' field which we parse as the
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'bitmaps' array in 'qemuBlockNamedNodeData') until after actually
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resuming CPUs, thus the check for existing bitmaps never actually
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worked.
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We need to check the 'qcow2bitmaps' field instead which is populated
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from the qcow2 headers prior to activating the image.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit 0c75fc1747f039bf878ceab69cf12482ebb14095)
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https://issues.redhat.com/browse/RHEL-145769 [rhel-10.2]
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https://issues.redhat.com/browse/RHEL-145770 [rhel-9.8]
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---
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src/qemu/qemu_migration.c | 16 +++++++---------
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1 file changed, 7 insertions(+), 9 deletions(-)
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diff --git a/src/qemu/qemu_migration.c b/src/qemu/qemu_migration.c
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index 9059f9aa3a..723e131c98 100644
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--- a/src/qemu/qemu_migration.c
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+++ b/src/qemu/qemu_migration.c
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@@ -3227,6 +3227,8 @@ qemuMigrationDstPrepareAnyBlockDirtyBitmaps(virDomainObj *vm,
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qemuBlockNamedNodeData *nodedata;
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GSList *nextbitmap;
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+ VIR_DEBUG("offer migrate bitmaps for '%s'", disk->target);
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+
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if (!(nodedata = virHashLookup(blockNamedNodeData, disk->nodename))) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("failed to find data for block node '%1$s'"),
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@@ -3243,18 +3245,14 @@ qemuMigrationDstPrepareAnyBlockDirtyBitmaps(virDomainObj *vm,
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for (nextbitmap = disk->bitmaps; nextbitmap; nextbitmap = nextbitmap->next) {
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qemuMigrationBlockDirtyBitmapsDiskBitmap *bitmap = nextbitmap->data;
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- size_t k;
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/* don't migrate into existing bitmaps */
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- for (k = 0; k < nodedata->nbitmaps; k++) {
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- if (STREQ(bitmap->bitmapname, nodedata->bitmaps[k]->name)) {
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- bitmap->skip = true;
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- break;
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- }
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- }
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+ if (nodedata->qcow2bitmaps)
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+ bitmap->skip = g_strv_contains((const char **) nodedata->qcow2bitmaps, bitmap->bitmapname);
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+
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+ VIR_DEBUG("offer migrate bitmap '%s' disk '%s' -> skip: '%d'",
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+ bitmap->bitmapname, disk->target, bitmap->skip);
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- if (bitmap->skip)
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- continue;
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}
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}
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--
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2.52.0
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