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https://gitlab.com/libvirt/libvirt.git
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vbox_tmpl.c: Add function for undefining snapshot
All snapshots information will be deleted from the vbox XML, but differencing disks will be kept so the user will be able to redefine the snapshot.
This commit is contained in:
Yohan BELLEGUIC
Daniel P. Berrange
parent
632b960044
commit
b739f80758
@ -8364,7 +8364,458 @@ vboxDomainSnapshotDeleteTree(vboxGlobalData *data,
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return ret;
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}
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#if VBOX_API_VERSION >= 4002000
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static int
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vboxDomainSnapshotDeleteMetadataOnly(virDomainSnapshotPtr snapshot)
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{
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/*
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* This function will remove the node in the vbox xml corresponding to the snapshot.
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* It is usually called by vboxDomainSnapshotDelete() with the flag
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* VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY.
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* If you want to use it anywhere else, be careful, if the snapshot you want to delete
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* has children, the result is not granted, they will probably will be deleted in the
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* xml, but you may have a problem with hard drives.
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*
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* If the snapshot which is being deleted is the current one, we will set the current
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* snapshot of the machine to the parent of this snapshot. Before writing the modified
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* xml file, we undefine the machine from vbox. After writing the file, we redefine
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* the machine with the new file.
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*/
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virDomainPtr dom = snapshot->domain;
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VBOX_OBJECT_CHECK(dom->conn, int, -1);
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virDomainSnapshotDefPtr def= NULL;
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char *defXml = NULL;
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vboxIID domiid = VBOX_IID_INITIALIZER;
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nsresult rc;
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IMachine *machine = NULL;
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PRUnichar *settingsFilePathUtf16 = NULL;
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char *settingsFilepath = NULL;
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virVBoxSnapshotConfMachinePtr snapshotMachineDesc = NULL;
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int isCurrent = -1;
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int it = 0;
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PRUnichar *machineNameUtf16 = NULL;
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char *machineName = NULL;
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char *nameTmpUse = NULL;
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char *machineLocationPath = NULL;
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PRUint32 aMediaSize = 0;
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IMedium **aMedia = NULL;
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defXml = vboxDomainSnapshotGetXMLDesc(snapshot, 0);
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if (!defXml) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Unable to get XML Desc of snapshot"));
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goto cleanup;
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}
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def = virDomainSnapshotDefParseString(defXml,
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data->caps,
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data->xmlopt,
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-1,
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VIR_DOMAIN_SNAPSHOT_PARSE_DISKS |
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VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE);
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if (!def) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Unable to get a virDomainSnapshotDefPtr"));
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goto cleanup;
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}
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vboxIIDFromUUID(&domiid, dom->uuid);
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rc = VBOX_OBJECT_GET_MACHINE(domiid.value, &machine);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_NO_DOMAIN, "%s",
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_("no domain with matching UUID"));
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goto cleanup;
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}
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rc = machine->vtbl->GetSettingsFilePath(machine, &settingsFilePathUtf16);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("cannot get settings file path"));
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goto cleanup;
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}
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VBOX_UTF16_TO_UTF8(settingsFilePathUtf16, &settingsFilepath);
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/*Getting the machine name to retrieve the machine location path.*/
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rc = machine->vtbl->GetName(machine, &machineNameUtf16);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("cannot get machine name"));
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goto cleanup;
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}
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VBOX_UTF16_TO_UTF8(machineNameUtf16, &machineName);
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if (virAsprintf(&nameTmpUse, "%s.vbox", machineName) < 0)
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goto cleanup;
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machineLocationPath = virStringReplace(settingsFilepath, nameTmpUse, "");
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if (machineLocationPath == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Unable to get the machine location path"));
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goto cleanup;
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}
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snapshotMachineDesc = virVBoxSnapshotConfLoadVboxFile(settingsFilepath, machineLocationPath);
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if (!snapshotMachineDesc) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("cannot create a vboxSnapshotXmlPtr"));
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goto cleanup;
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}
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isCurrent = virVBoxSnapshotConfIsCurrentSnapshot(snapshotMachineDesc, def->name);
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if (isCurrent < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Unable to know if the snapshot is the current snapshot"));
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goto cleanup;
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}
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if (isCurrent) {
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/*
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* If the snapshot is the current snapshot, it means that the machine has read-write
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* disks. The first thing to do is to manipulate VirtualBox API to create
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* differential read-write disks if the parent snapshot is not null.
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*/
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if (def->parent != NULL) {
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for (it = 0; it < def->dom->ndisks; it++) {
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virVBoxSnapshotConfHardDiskPtr readOnly = NULL;
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IMedium *medium = NULL;
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PRUnichar *locationUtf16 = NULL;
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PRUnichar *parentUuidUtf16 = NULL;
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char *parentUuid = NULL;
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IMedium *newMedium = NULL;
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PRUnichar *formatUtf16 = NULL;
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PRUnichar *newLocation = NULL;
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char *newLocationUtf8 = NULL;
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IProgress *progress = NULL;
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PRInt32 resultCode = -1;
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virVBoxSnapshotConfHardDiskPtr disk = NULL;
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PRUnichar *uuidUtf16 = NULL;
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char *uuid = NULL;
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char *format = NULL;
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char **searchResultTab = NULL;
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ssize_t resultSize = 0;
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char *tmp = NULL;
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readOnly = virVBoxSnapshotConfHardDiskPtrByLocation(snapshotMachineDesc,
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def->dom->disks[it]->src->path);
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if (!readOnly) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Cannot get hard disk by location"));
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goto cleanup;
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}
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if (readOnly->parent == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("The read only disk has no parent"));
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goto cleanup;
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}
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VBOX_UTF8_TO_UTF16(readOnly->parent->location, &locationUtf16);
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rc = data->vboxObj->vtbl->OpenMedium(data->vboxObj,
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locationUtf16,
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DeviceType_HardDisk,
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AccessMode_ReadWrite,
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false,
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&medium);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to open HardDisk, rc=%08x"),
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(unsigned)rc);
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goto cleanup;
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}
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rc = medium->vtbl->GetId(medium, &parentUuidUtf16);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to get hardDisk Id, rc=%08x"),
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(unsigned)rc);
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goto cleanup;
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}
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VBOX_UTF16_TO_UTF8(parentUuidUtf16, &parentUuid);
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VBOX_UTF16_FREE(parentUuidUtf16);
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VBOX_UTF16_FREE(locationUtf16);
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VBOX_UTF8_TO_UTF16("VDI", &formatUtf16);
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if (virAsprintf(&newLocationUtf8, "%sfakedisk-%s-%d.vdi",
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machineLocationPath, def->parent, it) < 0)
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goto cleanup;
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VBOX_UTF8_TO_UTF16(newLocationUtf8, &newLocation);
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rc = data->vboxObj->vtbl->CreateHardDisk(data->vboxObj,
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formatUtf16,
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newLocation,
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&newMedium);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to create HardDisk, rc=%08x"),
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(unsigned)rc);
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goto cleanup;
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}
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VBOX_UTF16_FREE(formatUtf16);
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VBOX_UTF16_FREE(newLocation);
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# if VBOX_API_VERSION < 4003000
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medium->vtbl->CreateDiffStorage(medium, newMedium, MediumVariant_Diff, &progress);
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# else
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PRUint32 tab[1];
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tab[0] = MediumVariant_Diff;
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medium->vtbl->CreateDiffStorage(medium, newMedium, 1, tab, &progress);
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# endif
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progress->vtbl->WaitForCompletion(progress, -1);
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progress->vtbl->GetResultCode(progress, &resultCode);
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if (NS_FAILED(resultCode)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Error while creating diff storage, rc=%08x"),
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(unsigned)resultCode);
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goto cleanup;
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}
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VBOX_RELEASE(progress);
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/*
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* The differential disk is created, we add it to the media registry and
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* the machine storage controller.
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*/
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if (VIR_ALLOC(disk) < 0)
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goto cleanup;
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rc = newMedium->vtbl->GetId(newMedium, &uuidUtf16);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to get medium uuid, rc=%08x"),
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(unsigned)rc);
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goto cleanup;
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}
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VBOX_UTF16_TO_UTF8(uuidUtf16, &uuid);
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disk->uuid = uuid;
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VBOX_UTF16_FREE(uuidUtf16);
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if (VIR_STRDUP(disk->location, newLocationUtf8) < 0)
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goto cleanup;
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rc = newMedium->vtbl->GetFormat(newMedium, &formatUtf16);
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VBOX_UTF16_TO_UTF8(formatUtf16, &format);
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disk->format = format;
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VBOX_UTF16_FREE(formatUtf16);
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if (virVBoxSnapshotConfAddHardDiskToMediaRegistry(disk,
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snapshotMachineDesc->mediaRegistry,
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parentUuid) < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Unable to add hard disk to the media registry"));
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goto cleanup;
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}
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/*Adding fake disks to the machine storage controllers*/
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resultSize = virStringSearch(snapshotMachineDesc->storageController,
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VBOX_UUID_REGEX,
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it + 1,
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&searchResultTab);
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if (resultSize != it + 1) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to find UUID %s"), searchResultTab[it]);
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goto cleanup;
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}
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tmp = virStringReplace(snapshotMachineDesc->storageController,
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searchResultTab[it],
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disk->uuid);
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virStringFreeList(searchResultTab);
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VIR_FREE(snapshotMachineDesc->storageController);
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if (!tmp)
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goto cleanup;
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if (VIR_STRDUP(snapshotMachineDesc->storageController, tmp) < 0)
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goto cleanup;
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VIR_FREE(tmp);
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/*Closing the "fake" disk*/
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rc = newMedium->vtbl->Close(newMedium);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to close the new medium, rc=%08x"),
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(unsigned)rc);
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goto cleanup;
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}
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}
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} else {
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for (it = 0; it < def->dom->ndisks; it++) {
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const char *uuidRO = NULL;
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char **searchResultTab = NULL;
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ssize_t resultSize = 0;
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char *tmp = NULL;
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uuidRO = virVBoxSnapshotConfHardDiskUuidByLocation(snapshotMachineDesc,
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def->dom->disks[it]->src->path);
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if (!uuidRO) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("No such disk in media registry %s"),
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def->dom->disks[it]->src->path);
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goto cleanup;
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}
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resultSize = virStringSearch(snapshotMachineDesc->storageController,
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VBOX_UUID_REGEX,
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it + 1,
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&searchResultTab);
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if (resultSize != it + 1) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to find UUID %s"),
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searchResultTab[it]);
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goto cleanup;
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}
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tmp = virStringReplace(snapshotMachineDesc->storageController,
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searchResultTab[it],
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uuidRO);
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virStringFreeList(searchResultTab);
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VIR_FREE(snapshotMachineDesc->storageController);
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if (!tmp)
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goto cleanup;
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if (VIR_STRDUP(snapshotMachineDesc->storageController, tmp) < 0)
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goto cleanup;
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VIR_FREE(tmp);
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}
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}
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}
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/*We remove the read write disks from the media registry*/
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for (it = 0; it < def->ndisks; it++) {
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const char *uuidRW =
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virVBoxSnapshotConfHardDiskUuidByLocation(snapshotMachineDesc,
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def->disks[it].src->path);
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if (!uuidRW) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to find UUID for location %s"), def->disks[it].src->path);
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goto cleanup;
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}
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if (virVBoxSnapshotConfRemoveHardDisk(snapshotMachineDesc->mediaRegistry, uuidRW) < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to remove disk from media registry. uuid = %s"), uuidRW);
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goto cleanup;
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}
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}
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/*If the parent snapshot is not NULL, we remove the-read only disks from the media registry*/
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if (def->parent != NULL) {
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for (it = 0; it < def->dom->ndisks; it++) {
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const char *uuidRO =
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virVBoxSnapshotConfHardDiskUuidByLocation(snapshotMachineDesc,
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def->dom->disks[it]->src->path);
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if (!uuidRO) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to find UUID for location %s"), def->dom->disks[it]->src->path);
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goto cleanup;
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}
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if (virVBoxSnapshotConfRemoveHardDisk(snapshotMachineDesc->mediaRegistry, uuidRO) < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to remove disk from media registry. uuid = %s"), uuidRO);
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goto cleanup;
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}
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}
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}
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rc = machine->vtbl->Unregister(machine,
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CleanupMode_DetachAllReturnHardDisksOnly,
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&aMediaSize,
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&aMedia);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to unregister machine, rc=%08x"),
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(unsigned)rc);
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goto cleanup;
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}
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VBOX_RELEASE(machine);
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for (it = 0; it < aMediaSize; it++) {
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IMedium *medium = aMedia[it];
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if (medium) {
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PRUnichar *locationUtf16 = NULL;
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char *locationUtf8 = NULL;
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rc = medium->vtbl->GetLocation(medium, &locationUtf16);
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VBOX_UTF16_TO_UTF8(locationUtf16, &locationUtf8);
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if (isCurrent && strstr(locationUtf8, "fake") != NULL) {
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/*we delete the fake disk because we don't need it anymore*/
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IProgress *progress = NULL;
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PRInt32 resultCode = -1;
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rc = medium->vtbl->DeleteStorage(medium, &progress);
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if (NS_FAILED(rc)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to delete medium, rc=%08x"),
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(unsigned)rc);
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goto cleanup;
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}
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progress->vtbl->WaitForCompletion(progress, -1);
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progress->vtbl->GetResultCode(progress, &resultCode);
|
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if (NS_FAILED(resultCode)) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Error while closing medium, rc=%08x"),
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(unsigned)resultCode);
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goto cleanup;
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}
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VBOX_RELEASE(progress);
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} else {
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/* This a comment from vboxmanage code in the handleUnregisterVM
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* function in VBoxManageMisc.cpp :
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* Note that the IMachine::Unregister method will return the medium
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* reference in a sane order, which means that closing will normally
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* succeed, unless there is still another machine which uses the
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* medium. No harm done if we ignore the error. */
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rc = medium->vtbl->Close(medium);
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}
|
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VBOX_UTF16_FREE(locationUtf16);
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VBOX_UTF8_FREE(locationUtf8);
|
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}
|
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}
|
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|
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/*removing the snapshot*/
|
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if (virVBoxSnapshotConfRemoveSnapshot(snapshotMachineDesc, def->name) < 0) {
|
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to remove snapshot %s"), def->name);
|
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goto cleanup;
|
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}
|
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|
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if (isCurrent) {
|
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VIR_FREE(snapshotMachineDesc->currentSnapshot);
|
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if (def->parent != NULL) {
|
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virVBoxSnapshotConfSnapshotPtr snap = virVBoxSnapshotConfSnapshotByName(snapshotMachineDesc->snapshot, def->parent);
|
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if (!snap) {
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
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_("Unable to get the snapshot to remove"));
|
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goto cleanup;
|
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}
|
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if (VIR_STRDUP(snapshotMachineDesc->currentSnapshot, snap->uuid) < 0)
|
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goto cleanup;
|
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}
|
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}
|
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|
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/*Registering the machine*/
|
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if (virVBoxSnapshotConfSaveVboxFile(snapshotMachineDesc, settingsFilepath) < 0) {
|
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virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
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_("Unable to serialize the machine description"));
|
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goto cleanup;
|
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}
|
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rc = data->vboxObj->vtbl->OpenMachine(data->vboxObj,
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settingsFilePathUtf16,
|
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&machine);
|
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if (NS_FAILED(rc)) {
|
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virReportError(VIR_ERR_INTERNAL_ERROR,
|
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_("Unable to open Machine, rc=%08x"),
|
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(unsigned)rc);
|
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goto cleanup;
|
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}
|
||||
|
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rc = data->vboxObj->vtbl->RegisterMachine(data->vboxObj, machine);
|
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if (NS_FAILED(rc)) {
|
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virReportError(VIR_ERR_INTERNAL_ERROR,
|
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_("Unable to register Machine, rc=%08x"),
|
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(unsigned)rc);
|
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goto cleanup;
|
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}
|
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|
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ret = 0;
|
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cleanup:
|
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VIR_FREE(def);
|
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VIR_FREE(defXml);
|
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VBOX_RELEASE(machine);
|
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VBOX_UTF16_FREE(settingsFilePathUtf16);
|
||||
VBOX_UTF8_FREE(settingsFilepath);
|
||||
VIR_FREE(snapshotMachineDesc);
|
||||
VBOX_UTF16_FREE(machineNameUtf16);
|
||||
VBOX_UTF8_FREE(machineName);
|
||||
VIR_FREE(machineLocationPath);
|
||||
VIR_FREE(nameTmpUse);
|
||||
|
||||
return ret;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int
|
||||
vboxDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
|
||||
@ -8378,6 +8829,7 @@ vboxDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
|
||||
IConsole *console = NULL;
|
||||
PRUint32 state;
|
||||
nsresult rc;
|
||||
vboxArray snapChildren = VBOX_ARRAY_INITIALIZER;
|
||||
|
||||
virCheckFlags(VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN |
|
||||
VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY, -1);
|
||||
@ -8405,7 +8857,21 @@ vboxDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
|
||||
*to remove the node concerning the snapshot
|
||||
*/
|
||||
if (flags & VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY) {
|
||||
ret = 0;
|
||||
rc = vboxArrayGet(&snapChildren, snap, snap->vtbl->GetChildren);
|
||||
if (NS_FAILED(rc)) {
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("could not get snapshot children"));
|
||||
goto cleanup;
|
||||
}
|
||||
if (snapChildren.count != 0) {
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("cannot delete metadata of a snapshot with children"));
|
||||
goto cleanup;
|
||||
} else {
|
||||
#if VBOX_API_VERSION >= 4002000
|
||||
ret = vboxDomainSnapshotDeleteMetadataOnly(snapshot);
|
||||
#endif
|
||||
}
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user