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https://gitlab.com/libvirt/libvirt.git
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test: Implement snapshot create/delete/revert APIs
Again stolen from qemu_driver.c, but dropping all the unneeded bits. This aims to copy all the current qemu validation checks since that's the most commonly used real driver, but some of the checks are completely artificial in the test driver. This only supports creation of internal snapshots for initial simplicity.
This commit is contained in:
Cole Robinson
parent
1d24185284
commit
390c06b675
@ -13517,7 +13517,7 @@ virDomainDefCheckABIStability(virDomainDefPtr src,
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virArchToString(src->os.arch));
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return false;
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}
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if (STRNEQ(src->os.machine, dst->os.machine)) {
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if (STRNEQ_NULLABLE(src->os.machine, dst->os.machine)) {
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virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
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_("Target domain OS type %s does not match source %s"),
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dst->os.machine, src->os.machine);
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@ -2955,9 +2955,11 @@ static int testDomainUndefineFlags(virDomainPtr domain,
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testConnPtr privconn = domain->conn->privateData;
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virDomainObjPtr privdom;
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virDomainEventPtr event = NULL;
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int nsnapshots;
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int ret = -1;
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virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE, -1);
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virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE |
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VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA, -1);
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testDriverLock(privconn);
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privdom = virDomainObjListFindByName(privconn->domains,
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@ -2976,6 +2978,24 @@ static int testDomainUndefineFlags(virDomainPtr domain,
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goto cleanup;
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}
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/* Requiring an inactive VM is part of the documented API for
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* UNDEFINE_SNAPSHOTS_METADATA
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*/
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if (!virDomainObjIsActive(privdom) &&
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(nsnapshots = virDomainSnapshotObjListNum(privdom->snapshots,
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NULL, 0))) {
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if (!(flags & VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA)) {
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virReportError(VIR_ERR_OPERATION_INVALID,
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_("cannot delete inactive domain with %d "
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"snapshots"),
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nsnapshots);
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goto cleanup;
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}
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/* There isn't actually anything to do, we are just emulating qemu
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* behavior here. */
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}
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event = virDomainEventNewFromObj(privdom,
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VIR_DOMAIN_EVENT_UNDEFINED,
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VIR_DOMAIN_EVENT_UNDEFINED_REMOVED);
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@ -6571,6 +6591,482 @@ cleanup:
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return ret;
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}
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static int
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testDomainSnapshotAlignDisks(virDomainObjPtr vm,
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virDomainSnapshotDefPtr def,
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unsigned int flags)
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{
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int align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL;
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int align_match = true;
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if (flags & VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY) {
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align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
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align_match = false;
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if (virDomainObjIsActive(vm))
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def->state = VIR_DOMAIN_DISK_SNAPSHOT;
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else
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def->state = VIR_DOMAIN_SHUTOFF;
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def->memory = VIR_DOMAIN_SNAPSHOT_LOCATION_NONE;
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} else if (def->memory == VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL) {
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def->state = virDomainObjGetState(vm, NULL);
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align_location = VIR_DOMAIN_SNAPSHOT_LOCATION_EXTERNAL;
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align_match = false;
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} else {
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def->state = virDomainObjGetState(vm, NULL);
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def->memory = def->state == VIR_DOMAIN_SHUTOFF ?
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VIR_DOMAIN_SNAPSHOT_LOCATION_NONE :
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VIR_DOMAIN_SNAPSHOT_LOCATION_INTERNAL;
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}
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return virDomainSnapshotAlignDisks(def, align_location, align_match);
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}
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static virDomainSnapshotPtr
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testDomainSnapshotCreateXML(virDomainPtr domain,
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const char *xmlDesc,
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unsigned int flags)
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{
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testConnPtr privconn = domain->conn->privateData;
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virDomainObjPtr vm = NULL;
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virDomainSnapshotDefPtr def = NULL;
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virDomainSnapshotObjPtr snap = NULL;
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virDomainSnapshotPtr snapshot = NULL;
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virDomainEventPtr event = NULL;
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char *xml = NULL;
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unsigned int parse_flags = VIR_DOMAIN_SNAPSHOT_PARSE_DISKS;
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/*
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* REDEFINE + CURRENT: Not implemented yet
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* DISK_ONLY: Not implemented yet
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* REUSE_EXT: Not implemented yet
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*
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* NO_METADATA: Explicitly not implemented
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*
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* HALT: Implemented
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* QUIESCE: Nothing to do
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* ATOMIC: Nothing to do
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* LIVE: Nothing to do
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*/
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virCheckFlags(
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VIR_DOMAIN_SNAPSHOT_CREATE_HALT |
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VIR_DOMAIN_SNAPSHOT_CREATE_QUIESCE |
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VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC |
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VIR_DOMAIN_SNAPSHOT_CREATE_LIVE, NULL);
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if (!(vm = testDomObjFromDomain(domain)))
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goto cleanup;
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if (!vm->persistent && (flags & VIR_DOMAIN_SNAPSHOT_CREATE_HALT)) {
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virReportError(VIR_ERR_OPERATION_INVALID, "%s",
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_("cannot halt after transient domain snapshot"));
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goto cleanup;
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}
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if (!(def = virDomainSnapshotDefParseString(xmlDesc,
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privconn->caps,
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privconn->xmlopt,
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1 << VIR_DOMAIN_VIRT_TEST,
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parse_flags)))
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goto cleanup;
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if (!(def->dom = virDomainDefCopy(vm->def,
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privconn->caps,
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privconn->xmlopt,
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true)))
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goto cleanup;
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if (testDomainSnapshotAlignDisks(vm, def, flags) < 0)
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goto cleanup;
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if (!(snap = virDomainSnapshotAssignDef(vm->snapshots, def)))
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goto cleanup;
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def = NULL;
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if (vm->current_snapshot) {
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if (!(flags & VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE) &&
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VIR_STRDUP(snap->def->parent, vm->current_snapshot->def->name) < 0)
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goto cleanup;
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}
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if ((flags & VIR_DOMAIN_SNAPSHOT_CREATE_HALT) &&
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virDomainObjIsActive(vm)) {
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testDomainShutdownState(domain, vm, VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT);
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event = virDomainEventNewFromObj(vm, VIR_DOMAIN_EVENT_STOPPED,
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VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT);
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}
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snapshot = virGetDomainSnapshot(domain, snap->def->name);
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cleanup:
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VIR_FREE(xml);
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if (vm) {
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if (snapshot) {
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virDomainSnapshotObjPtr other;
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vm->current_snapshot = snap;
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other = virDomainSnapshotFindByName(vm->snapshots,
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snap->def->parent);
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snap->parent = other;
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other->nchildren++;
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snap->sibling = other->first_child;
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other->first_child = snap;
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}
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virObjectUnlock(vm);
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}
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if (event) {
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testDriverLock(privconn);
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testDomainEventQueue(privconn, event);
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testDriverUnlock(privconn);
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}
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virDomainSnapshotDefFree(def);
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return snapshot;
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}
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typedef struct _testSnapRemoveData testSnapRemoveData;
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typedef testSnapRemoveData *testSnapRemoveDataPtr;
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struct _testSnapRemoveData {
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virDomainObjPtr vm;
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bool current;
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};
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static void
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testDomainSnapshotDiscardAll(void *payload,
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const void *name ATTRIBUTE_UNUSED,
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void *data)
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{
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virDomainSnapshotObjPtr snap = payload;
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testSnapRemoveDataPtr curr = data;
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if (snap->def->current)
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curr->current = true;
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virDomainSnapshotObjListRemove(curr->vm->snapshots, snap);
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}
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typedef struct _testSnapReparentData testSnapReparentData;
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typedef testSnapReparentData *testSnapReparentDataPtr;
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struct _testSnapReparentData {
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virDomainSnapshotObjPtr parent;
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virDomainObjPtr vm;
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int err;
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virDomainSnapshotObjPtr last;
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};
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static void
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testDomainSnapshotReparentChildren(void *payload,
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const void *name ATTRIBUTE_UNUSED,
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void *data)
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{
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virDomainSnapshotObjPtr snap = payload;
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testSnapReparentDataPtr rep = data;
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if (rep->err < 0) {
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return;
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}
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VIR_FREE(snap->def->parent);
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snap->parent = rep->parent;
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if (rep->parent->def &&
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VIR_STRDUP(snap->def->parent, rep->parent->def->name) < 0) {
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rep->err = -1;
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return;
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}
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if (!snap->sibling)
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rep->last = snap;
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}
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static int
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testDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
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unsigned int flags)
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{
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virDomainObjPtr vm = NULL;
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virDomainSnapshotObjPtr snap = NULL;
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virDomainSnapshotObjPtr parentsnap = NULL;
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int ret = -1;
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virCheckFlags(VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN |
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VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY, -1);
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if (!(vm = testDomObjFromSnapshot(snapshot)))
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return -1;
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if (!(snap = testSnapObjFromSnapshot(vm, snapshot)))
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goto cleanup;
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if (flags & (VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN |
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VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY)) {
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testSnapRemoveData rem;
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rem.vm = vm;
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rem.current = false;
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virDomainSnapshotForEachDescendant(snap,
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testDomainSnapshotDiscardAll,
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&rem);
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if (rem.current) {
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if (flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY) {
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snap->def->current = true;
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}
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vm->current_snapshot = snap;
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}
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} else if (snap->nchildren) {
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testSnapReparentData rep;
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rep.parent = snap->parent;
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rep.vm = vm;
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rep.err = 0;
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rep.last = NULL;
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virDomainSnapshotForEachChild(snap,
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testDomainSnapshotReparentChildren,
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&rep);
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if (rep.err < 0)
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goto cleanup;
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/* Can't modify siblings during ForEachChild, so do it now. */
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snap->parent->nchildren += snap->nchildren;
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rep.last->sibling = snap->parent->first_child;
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snap->parent->first_child = snap->first_child;
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}
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if (flags & VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY) {
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snap->nchildren = 0;
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snap->first_child = NULL;
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} else {
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virDomainSnapshotDropParent(snap);
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if (snap == vm->current_snapshot) {
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if (snap->def->parent) {
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parentsnap = virDomainSnapshotFindByName(vm->snapshots,
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snap->def->parent);
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if (!parentsnap) {
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VIR_WARN("missing parent snapshot matching name '%s'",
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snap->def->parent);
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} else {
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parentsnap->def->current = true;
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}
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}
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vm->current_snapshot = parentsnap;
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}
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virDomainSnapshotObjListRemove(vm->snapshots, snap);
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}
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ret = 0;
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cleanup:
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if (vm)
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virObjectUnlock(vm);
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return ret;
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}
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static int
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testDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
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unsigned int flags)
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{
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testConnPtr privconn = snapshot->domain->conn->privateData;
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virDomainObjPtr vm = NULL;
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virDomainSnapshotObjPtr snap = NULL;
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virDomainEventPtr event = NULL;
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virDomainEventPtr event2 = NULL;
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virDomainDefPtr config = NULL;
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int ret = -1;
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virCheckFlags(VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
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VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED |
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VIR_DOMAIN_SNAPSHOT_REVERT_FORCE, -1);
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/* We have the following transitions, which create the following events:
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* 1. inactive -> inactive: none
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* 2. inactive -> running: EVENT_STARTED
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* 3. inactive -> paused: EVENT_STARTED, EVENT_PAUSED
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* 4. running -> inactive: EVENT_STOPPED
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* 5. running -> running: none
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* 6. running -> paused: EVENT_PAUSED
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* 7. paused -> inactive: EVENT_STOPPED
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* 8. paused -> running: EVENT_RESUMED
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* 9. paused -> paused: none
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* Also, several transitions occur even if we fail partway through,
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* and use of FORCE can cause multiple transitions.
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*/
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if (!(vm = testDomObjFromSnapshot(snapshot)))
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return -1;
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if (!(snap = testSnapObjFromSnapshot(vm, snapshot)))
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goto cleanup;
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testDriverLock(privconn);
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if (!vm->persistent &&
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snap->def->state != VIR_DOMAIN_RUNNING &&
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snap->def->state != VIR_DOMAIN_PAUSED &&
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(flags & (VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
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VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED)) == 0) {
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virReportError(VIR_ERR_OPERATION_INVALID, "%s",
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_("transient domain needs to request run or pause "
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"to revert to inactive snapshot"));
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goto cleanup;
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}
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if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_FORCE)) {
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if (!snap->def->dom) {
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virReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY,
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_("snapshot '%s' lacks domain '%s' rollback info"),
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snap->def->name, vm->def->name);
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goto cleanup;
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}
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if (virDomainObjIsActive(vm) &&
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!(snap->def->state == VIR_DOMAIN_RUNNING
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|| snap->def->state == VIR_DOMAIN_PAUSED) &&
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(flags & (VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
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VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED))) {
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virReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY, "%s",
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_("must respawn guest to start inactive snapshot"));
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goto cleanup;
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}
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}
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if (vm->current_snapshot) {
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vm->current_snapshot->def->current = false;
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vm->current_snapshot = NULL;
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}
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snap->def->current = true;
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config = virDomainDefCopy(snap->def->dom,
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privconn->caps, privconn->xmlopt, true);
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if (!config)
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goto cleanup;
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|
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if (snap->def->state == VIR_DOMAIN_RUNNING ||
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snap->def->state == VIR_DOMAIN_PAUSED) {
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/* Transitions 2, 3, 5, 6, 8, 9 */
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bool was_running = false;
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bool was_stopped = false;
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if (virDomainObjIsActive(vm)) {
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/* Transitions 5, 6, 8, 9 */
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/* Check for ABI compatibility. */
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if (!virDomainDefCheckABIStability(vm->def, config)) {
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virErrorPtr err = virGetLastError();
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if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_FORCE)) {
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/* Re-spawn error using correct category. */
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if (err->code == VIR_ERR_CONFIG_UNSUPPORTED)
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virReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY, "%s",
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err->str2);
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goto cleanup;
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}
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virResetError(err);
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testDomainShutdownState(snapshot->domain, vm,
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VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT);
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event = virDomainEventNewFromObj(vm,
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VIR_DOMAIN_EVENT_STOPPED,
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VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT);
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if (event)
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testDomainEventQueue(privconn, event);
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goto load;
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}
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if (virDomainObjGetState(vm, NULL) == VIR_DOMAIN_RUNNING) {
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/* Transitions 5, 6 */
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was_running = true;
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virDomainObjSetState(vm, VIR_DOMAIN_PAUSED,
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VIR_DOMAIN_PAUSED_FROM_SNAPSHOT);
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/* Create an event now in case the restore fails, so
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* that user will be alerted that they are now paused.
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* If restore later succeeds, we might replace this. */
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event = virDomainEventNewFromObj(vm,
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VIR_DOMAIN_EVENT_SUSPENDED,
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VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT);
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}
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virDomainObjAssignDef(vm, config, false, NULL);
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} else {
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/* Transitions 2, 3 */
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load:
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was_stopped = true;
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virDomainObjAssignDef(vm, config, false, NULL);
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if (testDomainStartState(privconn, vm,
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VIR_DOMAIN_RUNNING_FROM_SNAPSHOT) < 0)
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goto cleanup;
|
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event = virDomainEventNewFromObj(vm,
|
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VIR_DOMAIN_EVENT_STARTED,
|
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VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT);
|
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}
|
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|
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/* Touch up domain state. */
|
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if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING) &&
|
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(snap->def->state == VIR_DOMAIN_PAUSED ||
|
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(flags & VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED))) {
|
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/* Transitions 3, 6, 9 */
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virDomainObjSetState(vm, VIR_DOMAIN_PAUSED,
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VIR_DOMAIN_PAUSED_FROM_SNAPSHOT);
|
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if (was_stopped) {
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/* Transition 3, use event as-is and add event2 */
|
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event2 = virDomainEventNewFromObj(vm,
|
||||
VIR_DOMAIN_EVENT_SUSPENDED,
|
||||
VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT);
|
||||
} /* else transition 6 and 9 use event as-is */
|
||||
} else {
|
||||
/* Transitions 2, 5, 8 */
|
||||
virDomainEventFree(event);
|
||||
event = NULL;
|
||||
|
||||
if (was_stopped) {
|
||||
/* Transition 2 */
|
||||
event = virDomainEventNewFromObj(vm,
|
||||
VIR_DOMAIN_EVENT_STARTED,
|
||||
VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT);
|
||||
} else if (was_running) {
|
||||
/* Transition 8 */
|
||||
event = virDomainEventNewFromObj(vm,
|
||||
VIR_DOMAIN_EVENT_RESUMED,
|
||||
VIR_DOMAIN_EVENT_RESUMED);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
/* Transitions 1, 4, 7 */
|
||||
virDomainObjAssignDef(vm, config, false, NULL);
|
||||
|
||||
if (virDomainObjIsActive(vm)) {
|
||||
/* Transitions 4, 7 */
|
||||
testDomainShutdownState(snapshot->domain, vm,
|
||||
VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT);
|
||||
event = virDomainEventNewFromObj(vm,
|
||||
VIR_DOMAIN_EVENT_STOPPED,
|
||||
VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT);
|
||||
}
|
||||
|
||||
if (flags & (VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING |
|
||||
VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED)) {
|
||||
/* Flush first event, now do transition 2 or 3 */
|
||||
bool paused = (flags & VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED) != 0;
|
||||
|
||||
if (event)
|
||||
testDomainEventQueue(privconn, event);
|
||||
event = virDomainEventNewFromObj(vm,
|
||||
VIR_DOMAIN_EVENT_STARTED,
|
||||
VIR_DOMAIN_EVENT_STARTED_FROM_SNAPSHOT);
|
||||
if (paused) {
|
||||
event2 = virDomainEventNewFromObj(vm,
|
||||
VIR_DOMAIN_EVENT_SUSPENDED,
|
||||
VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
vm->current_snapshot = snap;
|
||||
ret = 0;
|
||||
cleanup:
|
||||
if (event) {
|
||||
testDomainEventQueue(privconn, event);
|
||||
if (event2)
|
||||
testDomainEventQueue(privconn, event2);
|
||||
}
|
||||
virObjectUnlock(vm);
|
||||
testDriverUnlock(privconn);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static virDriver testDriver = {
|
||||
.no = VIR_DRV_TEST,
|
||||
@ -6662,6 +7158,9 @@ static virDriver testDriver = {
|
||||
.domainSnapshotCurrent = testDomainSnapshotCurrent, /* 1.1.4 */
|
||||
.domainSnapshotIsCurrent = testDomainSnapshotIsCurrent, /* 1.1.4 */
|
||||
.domainSnapshotHasMetadata = testDomainSnapshotHasMetadata, /* 1.1.4 */
|
||||
.domainSnapshotCreateXML = testDomainSnapshotCreateXML, /* 1.1.4 */
|
||||
.domainRevertToSnapshot = testDomainRevertToSnapshot, /* 1.1.4 */
|
||||
.domainSnapshotDelete = testDomainSnapshotDelete, /* 1.1.4 */
|
||||
};
|
||||
|
||||
static virNetworkDriver testNetworkDriver = {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user