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qemu: domain: Properly setup data relevant for top disk image

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qemuDomainPrepareDiskSourceChain should set up the disk zero detection
mode only for the top level image. Since it's invoked also for the
middle of the chain we need to check that it's really only the top level
image.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
This commit is contained in:
Peter Krempa 2018-05-29 16:52:17 +02:00
parent 3b5181b731
commit a522c3044b
1 changed files with 2 additions and 1 deletions
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3
src/qemu/qemu_domain.c
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@ -12421,7 +12421,8 @@ qemuDomainPrepareDiskSourceChain(virDomainDiskDefPtr disk,
src = disk->src;
/* transfer properties valid only for the top level image */
src->detect_zeroes = disk->detect_zeroes;
if (src == disk->src)
src->detect_zeroes = disk->detect_zeroes;
for (n = src; virStorageSourceIsBacking(n); n = n->backingStore) {
if (cfg &&