[libvirt PATCH v3 16/32] qemu_snapshot: rework snapshot children deletion
This simplifies the code a bit by reusing existing parts that deletes
a single snapshot.
The drawback of this change is that we will now call the re-parent bits
to keep the metadata in sync for every child even though it will get
deleted as well.
Signed-off-by: Pavel Hrdina <phrdina(a)redhat.com>
Reviewed-by: Peter Krempa <pkrempa(a)redhat.com>
---
src/qemu/qemu_snapshot.c | 69 +++++++++++++++++++++-------------------
1 file changed, 36 insertions(+), 33 deletions(-)
diff --git a/src/qemu/qemu_snapshot.c b/src/qemu/qemu_snapshot.c
index e65eef8a0d..37a52028a5 100644
--- a/src/qemu/qemu_snapshot.c
+++ b/src/qemu/qemu_snapshot.c
@@ -2311,6 +2311,31 @@ qemuSnapshotDeleteSingle(virDomainObj *vm,
}
+struct qemuSnapshotDeleteAllData {
+ virDomainObj *vm;
+ bool metadata_only;
+ int error;
+};
+
+
+static int
+qemuSnapshotDeleteAllHelper(void *payload,
+ const char *name G_GNUC_UNUSED,
+ void *opaque)
+{
+ int error;
+ virDomainMomentObj *snap = payload;
+ struct qemuSnapshotDeleteAllData *data = opaque;
+
+ error = qemuSnapshotDeleteSingle(data->vm, snap, data->metadata_only);
+
+ if (error != 0)
+ data->error = error;
+
+ return 0;
+}
+
+
/**
* qemuSnapshotDeleteChildren:
* @vm: domain object
@@ -2331,44 +2356,22 @@ qemuSnapshotDeleteChildren(virDomainObj *vm,
bool metadata_only,
bool children_only)
{
- virQEMUMomentRemove rem;
- qemuDomainObjPrivate *priv = vm->privateData;
- virQEMUDriver *driver = priv->driver;
- g_autoptr(virQEMUDriverConfig) cfg = virQEMUDriverGetConfig(driver);
+ struct qemuSnapshotDeleteAllData data = {
+ .vm = vm,
+ .metadata_only = metadata_only,
+ };
- rem.driver = driver;
- rem.vm = vm;
- rem.metadata_only = metadata_only;
- rem.err = 0;
- rem.current = virDomainSnapshotGetCurrent(vm->snapshots);
- rem.found = false;
- rem.momentDiscard = qemuDomainSnapshotDiscard;
- virDomainMomentForEachDescendant(snap, qemuDomainMomentDiscardAll,
- &rem);
- if (rem.err < 0)
- return -1;
- if (rem.found) {
- qemuSnapshotSetCurrent(vm, snap);
+ virDomainMomentForEachDescendant(snap, qemuSnapshotDeleteAllHelper, &data);
- if (children_only) {
- if (qemuDomainSnapshotWriteMetadata(vm, snap,
- driver->xmlopt,
- cfg->snapshotDir) < 0) {
- virReportError(VIR_ERR_INTERNAL_ERROR,
- _("failed to set snapshot '%s' as
current"),
- snap->def->name);
- virDomainSnapshotSetCurrent(vm->snapshots, NULL);
- return -1;
- }
- }
- }
+ if (data.error < 0)
+ return -1;
- if (children_only) {
- virDomainMomentDropChildren(snap);
- return 0;
+ if (!children_only &&
+ qemuSnapshotDeleteSingle(vm, snap, metadata_only) < 0) {
+ return -1;
}
- return qemuDomainSnapshotDiscard(driver, vm, snap, true, metadata_only);
+ return 0;
}
--
2.39.0