[PATCH 01/35] qemu: snapshot: Extract setup of snapshot disk definition for transient disks

The code will be later reused when adding support for sharing the backing image of the snapshot. Signed-off-by: Peter Krempa <pkrempa(a)redhat.com&gt; --- src/qemu/qemu_snapshot.c | 40 ++++++++++++++++++++++++++-------------- 1 file changed, 26 insertions(+), 14 deletions(-) diff --git a/src/qemu/qemu_snapshot.c b/src/qemu/qemu_snapshot.c index fd6669433b..c3cff46bc9 100644 --- a/src/qemu/qemu_snapshot.c +++ b/src/qemu/qemu_snapshot.c @@ -1168,6 +1168,29 @@ qemuSnapshotDiskPrepareActiveExternal(virDomainObj *vm, } +static virDomainSnapshotDiskDef * +qemuSnapshotGetTransientDiskDef(virDomainDiskDef *domdisk) +{ + g_autoptr(virDomainSnapshotDiskDef) snapdisk = g_new0(virDomainSnapshotDiskDef, 1); + + snapdisk->name = g_strdup(domdisk->dst); + snapdisk->snapshot = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL; + snapdisk->src = virStorageSourceNew(); + snapdisk->src->type = VIR_STORAGE_TYPE_FILE; + snapdisk->src->format = VIR_STORAGE_FILE_QCOW2; + snapdisk->src->path = g_strdup_printf("%s.TRANSIENT", domdisk->src->path); + + if (virFileExists(snapdisk->src->path)) { + virReportError(VIR_ERR_OPERATION_UNSUPPORTED, + _("Overlay file '%s' for transient disk '%s' already exists"), + snapdisk->src->path, domdisk->dst); + return NULL; + } + + return g_steal_pointer(&snapdisk); +} + + static qemuSnapshotDiskContext * qemuSnapshotDiskPrepareDisksTransient(virDomainObj *vm, virQEMUDriverConfig *cfg, @@ -1181,26 +1204,15 @@ qemuSnapshotDiskPrepareDisksTransient(virDomainObj *vm, for (i = 0; i < vm->def->ndisks; i++) { virDomainDiskDef *domdisk = vm->def->disks[i]; - g_autoptr(virDomainSnapshotDiskDef) snapdisk = g_new0(virDomainSnapshotDiskDef, 1); + g_autoptr(virDomainSnapshotDiskDef) snapdisk = NULL; if (!domdisk->transient) continue; /* validation code makes sure that we do this only for local disks * with a file source */ - snapdisk->name = g_strdup(domdisk->dst); - snapdisk->snapshot = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL; - snapdisk->src = virStorageSourceNew(); - snapdisk->src->type = VIR_STORAGE_TYPE_FILE; - snapdisk->src->format = VIR_STORAGE_FILE_QCOW2; - snapdisk->src->path = g_strdup_printf("%s.TRANSIENT", domdisk->src->path); - - if (virFileExists(snapdisk->src->path)) { - virReportError(VIR_ERR_OPERATION_UNSUPPORTED, - _("Overlay file '%s' for transient disk '%s' already exists"), - snapdisk->src->path, domdisk->dst); - return NULL; - } + + snapdisk = qemuSnapshotGetTransientDiskDef(domdisk); if (qemuSnapshotDiskPrepareOne(vm, cfg, domdisk, snapdisk, snapctxt->dd + snapctxt->ndd++, -- 2.31.1