Some properties don't make sense to be configured for every single layer
of the backing chain, but to avoid needing to pass the disk structure we
will copy them to the individual virStorageSource-s
Zero detection is applied only for the top layer image, while caching
and iomode for all layers.
Signed-off-by: Peter Krempa <pkrempa@xxxxxxxxxx>
---
src/qemu/qemu_domain.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 2c5de9508b..109f4f7f36 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -11844,6 +11844,9 @@ qemuDomainPrepareDiskSourceChain(virDomainDiskDefPtr disk,
if (!src)
src = disk->src;
+ /* transfer properties valid only for the top level image */
+ src->detect_zeroes = disk->detect_zeroes;
+
for (n = src; virStorageSourceIsBacking(n); n = n->backingStore) {
if (n->type == VIR_STORAGE_TYPE_NETWORK &&
n->protocol == VIR_STORAGE_NET_PROTOCOL_GLUSTER &&
@@ -11854,6 +11857,11 @@ qemuDomainPrepareDiskSourceChain(virDomainDiskDefPtr disk,
if (qemuDomainValidateStorageSource(n, qemuCaps) < 0)
return -1;
+
+ /* transfer properties valid for the full chain */
+ n->iomode = disk->iomode;
+ n->cachemode = disk->cachemode;
+ n->discard = disk->discard;
}
return 0;
--
2.16.2
--
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