void MMAPV1DatabaseCatalogEntry::_init(OperationContext* txn) {
WriteUnitOfWork wunit(txn);
// Upgrade freelist
const NamespaceString oldFreeList(name(), "$freelist");
NamespaceDetails* freeListDetails = _namespaceIndex.details(oldFreeList.ns());
if (freeListDetails) {
if (!freeListDetails->firstExtent.isNull()) {
_extentManager.freeExtents(
txn, freeListDetails->firstExtent, freeListDetails->lastExtent);
}
_namespaceIndex.kill_ns(txn, oldFreeList.ns());
}
DataFileVersion version = _extentManager.getFileFormat(txn);
if (version.isCompatibleWithCurrentCode() && !version.mayHave28Freelist()) {
// Any DB that can be opened and written to gets this flag set.
version.setMayHave28Freelist();
_extentManager.setFileFormat(txn, version);
}
const NamespaceString nsi(name(), "system.indexes");
const NamespaceString nsn(name(), "system.namespaces");
bool isSystemNamespacesGoingToBeNew = _namespaceIndex.details(nsn.toString()) == NULL;
bool isSystemIndexesGoingToBeNew = _namespaceIndex.details(nsi.toString()) == NULL;
_ensureSystemCollection(txn, nsn.toString());
_ensureSystemCollection(txn, nsi.toString());
if (isSystemNamespacesGoingToBeNew) {
txn->recoveryUnit()->registerChange(new EntryInsertion(nsn.toString(), this));
}
if (isSystemIndexesGoingToBeNew) {
txn->recoveryUnit()->registerChange(new EntryInsertion(nsi.toString(), this));
}
Entry*& indexEntry = _collections[nsi.toString()];
Entry*& nsEntry = _collections[nsn.toString()];
NamespaceDetails* const indexDetails = _namespaceIndex.details(nsi.toString());
NamespaceDetails* const nsDetails = _namespaceIndex.details(nsn.toString());
// order has to be:
// 1) ns rs
// 2) i rs
// 3) catalog entries
if (!nsEntry) {
nsEntry = new Entry();
NamespaceDetailsRSV1MetaData* md =
new NamespaceDetailsRSV1MetaData(nsn.toString(), nsDetails);
nsEntry->recordStore.reset(
new SimpleRecordStoreV1(txn, nsn.toString(), md, &_extentManager, false));
}
if (!indexEntry) {
indexEntry = new Entry();
NamespaceDetailsRSV1MetaData* md =
new NamespaceDetailsRSV1MetaData(nsi.toString(), indexDetails);
indexEntry->recordStore.reset(
new SimpleRecordStoreV1(txn, nsi.toString(), md, &_extentManager, true));
}
RecordId indexNamespaceId;
if (isSystemIndexesGoingToBeNew) {
indexNamespaceId = _addNamespaceToNamespaceCollection(txn, nsi.toString(), NULL);
}
if (!nsEntry->catalogEntry) {
nsEntry->catalogEntry.reset(
new NamespaceDetailsCollectionCatalogEntry(nsn.toString(),
nsDetails,
nsEntry->recordStore.get(),
RecordId(),
indexEntry->recordStore.get(),
this));
}
if (!indexEntry->catalogEntry) {
indexEntry->catalogEntry.reset(
new NamespaceDetailsCollectionCatalogEntry(nsi.toString(),
indexDetails,
nsEntry->recordStore.get(),
indexNamespaceId,
indexEntry->recordStore.get(),
this));
}
wunit.commit();
// Now put everything in the cache of namespaces. None of the operations below do any
// transactional operations.
RecordStoreV1Base* rs = _getNamespaceRecordStore();
invariant(rs);
auto cursor = rs->getCursor(txn);
while (auto record = cursor->next()) {
auto ns = record->data.releaseToBson()["name"].String();
Entry*& entry = _collections[ns];
// The two cases where entry is not null is for system.indexes and system.namespaces,
// which we manually instantiated above. It is OK to skip these two collections,
// because they don't have indexes on them anyway.
if (entry) {
if (entry->catalogEntry->getNamespacesRecordId().isNull()) {
entry->catalogEntry->setNamespacesRecordId(record->id);
} else {
invariant(entry->catalogEntry->getNamespacesRecordId() == record->id);
}
continue;
}
entry = new Entry();
_insertInCache(txn, ns, record->id, entry);
}
}
Status MMAPV1DatabaseCatalogEntry::renameCollection(OperationContext* txn,
StringData fromNS,
StringData toNS,
bool stayTemp) {
Status s = _renameSingleNamespace(txn, fromNS, toNS, stayTemp);
if (!s.isOK())
return s;
NamespaceDetails* details = _namespaceIndex.details(toNS);
invariant(details);
RecordStoreV1Base* systemIndexRecordStore = _getIndexRecordStore();
auto cursor = systemIndexRecordStore->getCursor(txn);
while (auto record = cursor->next()) {
BSONObj oldIndexSpec = record->data.releaseToBson();
if (fromNS != oldIndexSpec["ns"].valuestrsafe())
continue;
BSONObj newIndexSpec;
{
BSONObjBuilder b;
BSONObjIterator i(oldIndexSpec);
while (i.more()) {
BSONElement e = i.next();
if (strcmp(e.fieldName(), "ns") != 0)
b.append(e);
else
b << "ns" << toNS;
}
newIndexSpec = b.obj();
}
StatusWith<RecordId> newIndexSpecLoc = systemIndexRecordStore->insertRecord(
txn, newIndexSpec.objdata(), newIndexSpec.objsize(), false);
if (!newIndexSpecLoc.isOK())
return newIndexSpecLoc.getStatus();
const std::string& indexName = oldIndexSpec.getStringField("name");
{
// Fix the IndexDetails pointer.
int indexI = getCollectionCatalogEntry(toNS)->_findIndexNumber(txn, indexName);
IndexDetails& indexDetails = details->idx(indexI);
*txn->recoveryUnit()->writing(&indexDetails.info) =
DiskLoc::fromRecordId(newIndexSpecLoc.getValue());
}
{
// Move the underlying namespace.
std::string oldIndexNs = IndexDescriptor::makeIndexNamespace(fromNS, indexName);
std::string newIndexNs = IndexDescriptor::makeIndexNamespace(toNS, indexName);
Status s = _renameSingleNamespace(txn, oldIndexNs, newIndexNs, false);
if (!s.isOK())
return s;
}
systemIndexRecordStore->deleteRecord(txn, record->id);
}
return Status::OK();
}