public static DiskImage cloneDiskImage(
Guid storageDomainId,
Guid newImageGroupId,
Guid newImageGuid,
DiskImage srcDiskImage,
Guid diskProfileId,
Guid snapshotId,
DiskImage diskImageFromClient) {
DiskImage clonedDiskImage = DiskImage.copyOf(srcDiskImage);
clonedDiskImage.setImageId(newImageGuid);
clonedDiskImage.setParentId(Guid.Empty);
clonedDiskImage.setImageTemplateId(Guid.Empty);
clonedDiskImage.setVmSnapshotId(snapshotId);
clonedDiskImage.setId(newImageGroupId);
clonedDiskImage.setLastModifiedDate(new Date());
clonedDiskImage.setvolumeFormat(srcDiskImage.getVolumeFormat());
clonedDiskImage.setVolumeType(srcDiskImage.getVolumeType());
ArrayList<Guid> storageIds = new ArrayList<>();
storageIds.add(storageDomainId);
clonedDiskImage.setStorageIds(storageIds);
clonedDiskImage.setDiskProfileId(diskProfileId);
// If volume information was changed at client , use its volume information.
// If volume information was not changed at client - use the volume information of the ancestral
// image
if (diskImageFromClient != null) {
if (volumeInfoChanged(diskImageFromClient, srcDiskImage)) {
changeVolumeInfo(clonedDiskImage, diskImageFromClient);
} else {
DiskImage ancestorDiskImage = getDiskImageDao().getAncestor(srcDiskImage.getImageId());
changeVolumeInfo(clonedDiskImage, ancestorDiskImage);
}
} else {
DiskImage ancestorDiskImage = getDiskImageDao().getAncestor(srcDiskImage.getImageId());
changeVolumeInfo(clonedDiskImage, ancestorDiskImage);
}
return clonedDiskImage;
}
protected static void changeVolumeInfo(DiskImage clonedDiskImage, DiskImage diskImageFromClient) {
clonedDiskImage.setvolumeFormat(diskImageFromClient.getVolumeFormat());
clonedDiskImage.setVolumeType(diskImageFromClient.getVolumeType());
}
private static boolean volumeInfoChanged(DiskImage diskImageFromClient, DiskImage srcDiskImage) {
return diskImageFromClient.getVolumeFormat() != srcDiskImage.getVolumeFormat()
|| diskImageFromClient.getVolumeType() != srcDiskImage.getVolumeType();
}
/**
* After merging the snapshots, update the image and snapshot records in the database to reflect
* the changes. This handles either forward or backwards merge (detected). It will either then
* remove the images, or mark them illegal (to handle the case where image deletion failed).
*
* @param removeImages Remove the images from the database, or if false, only mark them illegal
*/
private void syncDbRecords(boolean removeImages) {
// If deletion failed after a backwards merge, the snapshots' images need to be swapped
// as they would upon success. Instead of removing them, mark them illegal.
DiskImage baseImage = getDiskImage();
DiskImage topImage = getDestinationDiskImage();
// The vdsm merge verb may decide to perform a forward or backward merge.
if (topImage == null) {
log.debug("No merge destination image, not updating image/snapshot association");
} else if (getParameters().getMergeStatusReturnValue().getBlockJobType()
== VmBlockJobType.PULL) {
// For forward merge, the volume format and type may change.
topImage.setvolumeFormat(baseImage.getVolumeFormat());
topImage.setVolumeType(baseImage.getVolumeType());
topImage.setParentId(baseImage.getParentId());
topImage.setImageStatus(ImageStatus.OK);
getBaseDiskDao().update(topImage);
getImageDao().update(topImage.getImage());
updateDiskImageDynamic(topImage);
updateVmConfigurationForImageRemoval(
baseImage.getImage().getSnapshotId(), baseImage.getImageId());
} else {
// For backwards merge, the prior base image now has the data associated with the newer
// snapshot we want to keep. Re-associate this older image with the newer snapshot.
// The base snapshot is deleted if everything went well. In case it's not deleted, we
// hijack it to preserve a link to the broken image. This makes the image discoverable
// so that we can retry the deletion later, yet doesn't corrupt the VM image chain.
List<DiskImage> children =
DbFacade.getInstance().getDiskImageDao().getAllSnapshotsForParent(topImage.getImageId());
if (!children.isEmpty()) {
DiskImage childImage = children.get(0);
childImage.setParentId(baseImage.getImageId());
getImageDao().update(childImage.getImage());
}
Image oldTopImage = topImage.getImage();
topImage.setImage(baseImage.getImage());
baseImage.setImage(oldTopImage);
Guid oldTopSnapshotId = topImage.getImage().getSnapshotId();
topImage.getImage().setSnapshotId(baseImage.getImage().getSnapshotId());
baseImage.getImage().setSnapshotId(oldTopSnapshotId);
boolean oldTopIsActive = topImage.getImage().isActive();
topImage.getImage().setActive(baseImage.getImage().isActive());
VolumeClassification baseImageVolumeClassification =
VolumeClassification.getVolumeClassificationByActiveFlag(baseImage.getImage().isActive());
topImage.getImage().setVolumeClassification(baseImageVolumeClassification);
baseImage.getImage().setActive(oldTopIsActive);
VolumeClassification oldTopVolumeClassification =
VolumeClassification.getVolumeClassificationByActiveFlag(oldTopIsActive);
topImage.getImage().setVolumeClassification(oldTopVolumeClassification);
topImage.setSize(baseImage.getSize());
topImage.setImageStatus(ImageStatus.OK);
getBaseDiskDao().update(topImage);
getImageDao().update(topImage.getImage());
updateDiskImageDynamic(topImage);
getBaseDiskDao().update(baseImage);
getImageDao().update(baseImage.getImage());
updateVmConfigurationForImageChange(
topImage.getImage().getSnapshotId(), baseImage.getImageId(), topImage);
updateVmConfigurationForImageRemoval(
baseImage.getImage().getSnapshotId(), topImage.getImageId());
}
Set<Guid> imagesToUpdate = getParameters().getMergeStatusReturnValue().getImagesToRemove();
if (imagesToUpdate == null) {
log.error("Failed to update orphaned images in db: image list could not be retrieved");
return;
}
for (Guid imageId : imagesToUpdate) {
if (removeImages) {
getImageDao().remove(imageId);
} else {
// The (illegal && no-parent && no-children) status indicates an orphaned image.
Image image = getImageDao().get(imageId);
image.setStatus(ImageStatus.ILLEGAL);
image.setParentId(Guid.Empty);
getImageDao().update(image);
}
}
}