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qemu: block: Add generator for the 'copy-on-read' blockdev driver
The copy on read functionality is done using a separate layer in the backing chain. Add function to generate properties for it. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>
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@ -1745,3 +1745,25 @@ qemuBlockSnapshotAddLegacy(virJSONValuePtr actions,
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VIR_FREE(source);
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return ret;
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}
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/**
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* qemuBlockStorageGetCopyOnReadProps:
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* @disk: disk with copy-on-read enabled
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*
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* Creates blockdev properties for a disk copy-on-read layer.
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*/
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virJSONValuePtr
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qemuBlockStorageGetCopyOnReadProps(virDomainDiskDefPtr disk)
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{
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qemuDomainDiskPrivatePtr priv = QEMU_DOMAIN_DISK_PRIVATE(disk);
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virJSONValuePtr ret = NULL;
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ignore_value(virJSONValueObjectCreate(&ret,
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"s:driver", "copy-on-read",
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"s:node-name", priv->nodeCopyOnRead,
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"s:file", disk->src->nodeformat,
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NULL));
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return ret;
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}
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@ -67,6 +67,8 @@ qemuBlockStorageSourceGetURI(virStorageSourcePtr src);
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virJSONValuePtr
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qemuBlockStorageSourceGetBlockdevProps(virStorageSourcePtr src);
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virJSONValuePtr
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qemuBlockStorageGetCopyOnReadProps(virDomainDiskDefPtr disk);
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typedef struct qemuBlockStorageSourceAttachData qemuBlockStorageSourceAttachData;
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typedef qemuBlockStorageSourceAttachData *qemuBlockStorageSourceAttachDataPtr;
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