/
index_catalog_impl.cpp
1680 lines (1420 loc) · 67.3 KB
/
index_catalog_impl.cpp
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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kIndex
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/index_catalog_impl.h"
#include <vector>
#include "mongo/base/init.h"
#include "mongo/bson/simple_bsonelement_comparator.h"
#include "mongo/bson/simple_bsonobj_comparator.h"
#include "mongo/db/audit.h"
#include "mongo/db/background.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/index_build_block.h"
#include "mongo/db/catalog/index_catalog_entry_impl.h"
#include "mongo/db/catalog/index_key_validate.h"
#include "mongo/db/catalog/uncommitted_collections.h"
#include "mongo/db/client.h"
#include "mongo/db/clientcursor.h"
#include "mongo/db/curop.h"
#include "mongo/db/field_ref.h"
#include "mongo/db/fts/fts_spec.h"
#include "mongo/db/index/index_access_method.h"
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/index/s2_access_method.h"
#include "mongo/db/index_names.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/keypattern.h"
#include "mongo/db/logical_clock.h"
#include "mongo/db/matcher/expression.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/ops/delete.h"
#include "mongo/db/query/collation/collation_spec.h"
#include "mongo/db/query/collation/collator_factory_interface.h"
#include "mongo/db/query/collection_query_info.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/db/server_options.h"
#include "mongo/db/service_context.h"
#include "mongo/db/storage/durable_catalog.h"
#include "mongo/db/storage/kv/kv_engine.h"
#include "mongo/db/storage/storage_engine_init.h"
#include "mongo/db/ttl_collection_cache.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/log.h"
#include "mongo/util/represent_as.h"
#include "mongo/util/str.h"
namespace mongo {
using std::endl;
using std::string;
using std::unique_ptr;
using std::vector;
using IndexVersion = IndexDescriptor::IndexVersion;
const BSONObj IndexCatalogImpl::_idObj = BSON("_id" << 1);
// -------------
IndexCatalogImpl::IndexCatalogImpl(Collection* collection) : _collection(collection) {}
Status IndexCatalogImpl::init(OperationContext* opCtx) {
vector<string> indexNames;
auto durableCatalog = DurableCatalog::get(opCtx);
durableCatalog->getAllIndexes(opCtx, _collection->getCatalogId(), &indexNames);
for (size_t i = 0; i < indexNames.size(); i++) {
const string& indexName = indexNames[i];
BSONObj spec =
durableCatalog->getIndexSpec(opCtx, _collection->getCatalogId(), indexName).getOwned();
invariant(durableCatalog->isIndexReady(opCtx, _collection->getCatalogId(), indexName));
BSONObj keyPattern = spec.getObjectField("key");
auto descriptor =
std::make_unique<IndexDescriptor>(_collection, _getAccessMethodName(keyPattern), spec);
if (spec.hasField("expireAfterSeconds")) {
TTLCollectionCache::get(getGlobalServiceContext())
.registerTTLInfo(std::make_pair(_collection->uuid(), indexName));
}
const bool initFromDisk = true;
const bool isReadyIndex = true;
IndexCatalogEntry* entry =
createIndexEntry(opCtx, std::move(descriptor), initFromDisk, isReadyIndex);
fassert(17340, entry->isReady(opCtx));
}
CollectionQueryInfo::get(_collection).init(opCtx);
return Status::OK();
}
std::unique_ptr<IndexCatalog::IndexIterator> IndexCatalogImpl::getIndexIterator(
OperationContext* const opCtx, const bool includeUnfinishedIndexes) const {
if (!includeUnfinishedIndexes) {
// If the caller only wants the ready indexes, we return an iterator over the catalog's
// ready indexes vector. When the user advances this iterator, it will filter out any
// indexes that were not ready at the OperationContext's read timestamp.
return std::make_unique<ReadyIndexesIterator>(
opCtx, _readyIndexes.begin(), _readyIndexes.end());
}
// If the caller wants all indexes, for simplicity of implementation, we copy the pointers to
// a new vector. The vector's ownership is passed to the iterator. The query code path from an
// external client is not expected to hit this case so the cost isn't paid by the important
// code path.
auto allIndexes = std::make_unique<std::vector<IndexCatalogEntry*>>();
for (auto it = _readyIndexes.begin(); it != _readyIndexes.end(); ++it) {
allIndexes->push_back(it->get());
}
for (auto it = _buildingIndexes.begin(); it != _buildingIndexes.end(); ++it) {
allIndexes->push_back(it->get());
}
return std::make_unique<AllIndexesIterator>(opCtx, std::move(allIndexes));
}
string IndexCatalogImpl::_getAccessMethodName(const BSONObj& keyPattern) const {
string pluginName = IndexNames::findPluginName(keyPattern);
// This assert will be triggered when downgrading from a future version that
// supports an index plugin unsupported by this version.
uassert(17197,
str::stream() << "Invalid index type '" << pluginName << "' "
<< "in index " << keyPattern,
IndexNames::isKnownName(pluginName));
return pluginName;
}
// ---------------------------
StatusWith<BSONObj> IndexCatalogImpl::_validateAndFixIndexSpec(OperationContext* opCtx,
const BSONObj& original) const {
Status status = _isSpecOk(opCtx, original);
if (!status.isOK()) {
return status;
}
auto swFixed = _fixIndexSpec(opCtx, _collection, original);
if (!swFixed.isOK()) {
return swFixed;
}
// we double check with new index spec
status = _isSpecOk(opCtx, swFixed.getValue());
if (!status.isOK()) {
return status;
}
return swFixed;
}
Status IndexCatalogImpl::_isNonIDIndexAndNotAllowedToBuild(OperationContext* opCtx,
const BSONObj& spec) const {
const BSONObj key = spec.getObjectField("key");
invariant(!key.isEmpty());
if (!IndexDescriptor::isIdIndexPattern(key)) {
// Check whether the replica set member's config has {buildIndexes:false} set, which means
// we are not allowed to build non-_id indexes on this server.
if (!repl::ReplicationCoordinator::get(opCtx)->buildsIndexes()) {
// We return an IndexAlreadyExists error so that the caller can catch it and silently
// skip building it.
return Status(ErrorCodes::IndexAlreadyExists,
"this replica set member's 'buildIndexes' setting is set to false");
}
}
return Status::OK();
}
void IndexCatalogImpl::_logInternalState(OperationContext* opCtx,
long long numIndexesInCollectionCatalogEntry,
const std::vector<std::string>& indexNamesToDrop,
bool haveIdIndex) {
invariant(opCtx->lockState()->isCollectionLockedForMode(_collection->ns(), MODE_X));
error() << "Internal Index Catalog state: "
<< " numIndexesTotal(): " << numIndexesTotal(opCtx)
<< " numSystemIndexesEntries: " << numIndexesInCollectionCatalogEntry
<< " _readyIndexes.size(): " << _readyIndexes.size()
<< " _buildingIndexes.size(): " << _buildingIndexes.size()
<< " indexNamesToDrop: " << indexNamesToDrop.size() << " haveIdIndex: " << haveIdIndex;
// Report the ready indexes.
error() << "Ready indexes:";
for (const auto& entry : _readyIndexes) {
const IndexDescriptor* desc = entry->descriptor();
error() << "Index '" << desc->indexName()
<< "' with specification: " << redact(desc->infoObj());
}
// Report the in-progress indexes.
error() << "In-progress indexes:";
for (const auto& entry : _buildingIndexes) {
const IndexDescriptor* desc = entry->descriptor();
error() << "Index '" << desc->indexName()
<< "' with specification: " << redact(desc->infoObj());
}
error() << "Internal Collection Catalog Entry state:";
std::vector<std::string> allIndexes;
std::vector<std::string> readyIndexes;
auto durableCatalog = DurableCatalog::get(opCtx);
durableCatalog->getAllIndexes(opCtx, _collection->getCatalogId(), &allIndexes);
durableCatalog->getReadyIndexes(opCtx, _collection->getCatalogId(), &readyIndexes);
error() << "All indexes:";
for (const auto& index : allIndexes) {
error() << "Index '" << index << "' with specification: "
<< redact(durableCatalog->getIndexSpec(opCtx, _collection->getCatalogId(), index));
}
error() << "Ready indexes:";
for (const auto& index : readyIndexes) {
error() << "Index '" << index << "' with specification: "
<< redact(durableCatalog->getIndexSpec(opCtx, _collection->getCatalogId(), index));
}
error() << "Index names to drop:";
for (const auto& indexNameToDrop : indexNamesToDrop) {
error() << "Index '" << indexNameToDrop << "' with specification: "
<< redact(durableCatalog->getIndexSpec(
opCtx, _collection->getCatalogId(), indexNameToDrop));
}
}
StatusWith<BSONObj> IndexCatalogImpl::prepareSpecForCreate(OperationContext* opCtx,
const BSONObj& original) const {
auto swValidatedAndFixed = _validateAndFixIndexSpec(opCtx, original);
if (!swValidatedAndFixed.isOK()) {
return swValidatedAndFixed.getStatus().withContext(
str::stream() << "Error in specification " << original.toString());
}
// Check whether this is a non-_id index and there are any settings disallowing this server
// from building non-_id indexes.
Status status = _isNonIDIndexAndNotAllowedToBuild(opCtx, swValidatedAndFixed.getValue());
if (!status.isOK()) {
return status;
}
// First check against only the ready indexes for conflicts.
status = _doesSpecConflictWithExisting(opCtx, swValidatedAndFixed.getValue(), false);
if (!status.isOK()) {
return status;
}
// Now we will check against all indexes, in-progress included.
//
// The index catalog cannot currently iterate over only in-progress indexes. So by previously
// checking against only ready indexes without error, we know that any errors encountered
// checking against all indexes occurred due to an in-progress index.
status = _doesSpecConflictWithExisting(opCtx, swValidatedAndFixed.getValue(), true);
if (!status.isOK()) {
if (ErrorCodes::IndexAlreadyExists == status.code()) {
// Callers need to be able to distinguish conflicts against ready indexes versus
// in-progress indexes.
return {ErrorCodes::IndexBuildAlreadyInProgress, status.reason()};
}
return status;
}
return swValidatedAndFixed.getValue();
}
std::vector<BSONObj> IndexCatalogImpl::removeExistingIndexesNoChecks(
OperationContext* const opCtx, const std::vector<BSONObj>& indexSpecsToBuild) const {
std::vector<BSONObj> result;
// Filter out ready and in-progress index builds, and any non-_id indexes if 'buildIndexes' is
// set to false in the replica set's config.
for (const auto& spec : indexSpecsToBuild) {
// returned to be built by the caller.
if (ErrorCodes::OK != _isNonIDIndexAndNotAllowedToBuild(opCtx, spec)) {
continue;
}
// _doesSpecConflictWithExisting currently does more work than we require here: we are only
// interested in the index already exists error.
if (ErrorCodes::IndexAlreadyExists ==
_doesSpecConflictWithExisting(opCtx, spec, true /*includeUnfinishedIndexes*/)) {
continue;
}
result.push_back(spec);
}
return result;
}
std::vector<BSONObj> IndexCatalogImpl::removeExistingIndexes(
OperationContext* const opCtx,
const std::vector<BSONObj>& indexSpecsToBuild,
const bool removeIndexBuildsToo) const {
std::vector<BSONObj> result;
for (const auto& spec : indexSpecsToBuild) {
auto prepareResult = prepareSpecForCreate(opCtx, spec);
if (prepareResult == ErrorCodes::IndexAlreadyExists ||
(removeIndexBuildsToo && prepareResult == ErrorCodes::IndexBuildAlreadyInProgress)) {
continue;
}
uassertStatusOK(prepareResult);
result.push_back(prepareResult.getValue());
}
return result;
}
IndexCatalogEntry* IndexCatalogImpl::createIndexEntry(OperationContext* opCtx,
std::unique_ptr<IndexDescriptor> descriptor,
bool initFromDisk,
bool isReadyIndex) {
Status status = _isSpecOk(opCtx, descriptor->infoObj());
if (!status.isOK()) {
severe() << "Found an invalid index " << descriptor->infoObj() << " on the "
<< _collection->ns() << " collection: " << redact(status);
fassertFailedNoTrace(28782);
}
auto engine = opCtx->getServiceContext()->getStorageEngine();
std::string ident = engine->getCatalog()->getIndexIdent(
opCtx, _collection->getCatalogId(), descriptor->indexName());
auto* const descriptorPtr = descriptor.get();
auto entry = std::make_shared<IndexCatalogEntryImpl>(
opCtx, ident, std::move(descriptor), &CollectionQueryInfo::get(_collection));
IndexDescriptor* desc = entry->descriptor();
std::unique_ptr<SortedDataInterface> sdi =
engine->getEngine()->getGroupedSortedDataInterface(opCtx, ident, desc, entry->getPrefix());
std::unique_ptr<IndexAccessMethod> accessMethod =
IndexAccessMethodFactory::get(opCtx)->make(entry.get(), std::move(sdi));
entry->init(std::move(accessMethod));
IndexCatalogEntry* save = entry.get();
if (isReadyIndex) {
_readyIndexes.add(std::move(entry));
} else {
_buildingIndexes.add(std::move(entry));
}
if (!initFromDisk) {
opCtx->recoveryUnit()->onRollback([this, opCtx, isReadyIndex, descriptor = descriptorPtr] {
// Need to preserve indexName as descriptor no longer exists after remove().
const std::string indexName = descriptor->indexName();
if (isReadyIndex) {
_readyIndexes.remove(descriptor);
} else {
_buildingIndexes.remove(descriptor);
}
CollectionQueryInfo::get(_collection).droppedIndex(opCtx, indexName);
});
}
return save;
}
StatusWith<BSONObj> IndexCatalogImpl::createIndexOnEmptyCollection(OperationContext* opCtx,
BSONObj spec) {
invariant(UncommittedCollections::get(opCtx).hasExclusiveAccessToCollection(opCtx,
_collection->ns()));
invariant(_collection->numRecords(opCtx) == 0,
str::stream() << "Collection must be empty. Collection: " << _collection->ns()
<< " UUID: " << _collection->uuid()
<< " Count: " << _collection->numRecords(opCtx));
StatusWith<BSONObj> statusWithSpec = prepareSpecForCreate(opCtx, spec);
Status status = statusWithSpec.getStatus();
if (!status.isOK())
return status;
spec = statusWithSpec.getValue();
// now going to touch disk
boost::optional<UUID> buildUUID = boost::none;
IndexBuildBlock indexBuildBlock(
this, _collection->ns(), spec, IndexBuildMethod::kForeground, buildUUID);
status = indexBuildBlock.init(opCtx, _collection);
if (!status.isOK())
return status;
// sanity checks, etc...
IndexCatalogEntry* entry = indexBuildBlock.getEntry();
invariant(entry);
IndexDescriptor* descriptor = entry->descriptor();
invariant(descriptor);
invariant(entry == _buildingIndexes.find(descriptor));
status = entry->accessMethod()->initializeAsEmpty(opCtx);
if (!status.isOK())
return status;
indexBuildBlock.success(opCtx, _collection);
// sanity check
invariant(DurableCatalog::get(opCtx)->isIndexReady(
opCtx, _collection->getCatalogId(), descriptor->indexName()));
return spec;
}
namespace {
constexpr int kMaxNumIndexesAllowed = 64;
// While technically recursive, only current possible with 2 levels.
Status _checkValidFilterExpressions(MatchExpression* expression, int level = 0) {
if (!expression)
return Status::OK();
switch (expression->matchType()) {
case MatchExpression::AND:
if (level > 0)
return Status(ErrorCodes::CannotCreateIndex,
"$and only supported in partialFilterExpression at top level");
for (size_t i = 0; i < expression->numChildren(); i++) {
Status status = _checkValidFilterExpressions(expression->getChild(i), level + 1);
if (!status.isOK())
return status;
}
return Status::OK();
case MatchExpression::EQ:
case MatchExpression::LT:
case MatchExpression::LTE:
case MatchExpression::GT:
case MatchExpression::GTE:
case MatchExpression::EXISTS:
case MatchExpression::TYPE_OPERATOR:
return Status::OK();
default:
return Status(ErrorCodes::CannotCreateIndex,
str::stream() << "unsupported expression in partial index: "
<< expression->debugString());
}
}
/**
* Adjust the provided index spec BSONObj depending on the type of index obj describes.
*
* This is a no-op unless the object describes a TEXT or a GEO_2DSPHERE index. TEXT and
* GEO_2DSPHERE provide additional validation on the index spec, and tweak the index spec
* object to conform to their expected format.
*/
StatusWith<BSONObj> adjustIndexSpecObject(const BSONObj& obj) {
std::string pluginName = IndexNames::findPluginName(obj.getObjectField("key"));
if (IndexNames::TEXT == pluginName) {
return fts::FTSSpec::fixSpec(obj);
}
if (IndexNames::GEO_2DSPHERE == pluginName) {
return S2AccessMethod::fixSpec(obj);
}
return obj;
}
} // namespace
Status IndexCatalogImpl::_isSpecOk(OperationContext* opCtx, const BSONObj& spec) const {
const NamespaceString& nss = _collection->ns();
BSONElement vElt = spec["v"];
if (!vElt) {
return {ErrorCodes::InternalError,
str::stream()
<< "An internal operation failed to specify the 'v' field, which is a required "
"property of an index specification: "
<< spec};
}
if (!vElt.isNumber()) {
return Status(ErrorCodes::CannotCreateIndex,
str::stream() << "non-numeric value for \"v\" field: " << vElt);
}
auto vEltAsInt = representAs<int>(vElt.number());
if (!vEltAsInt) {
return {ErrorCodes::CannotCreateIndex,
str::stream() << "Index version must be representable as a 32-bit integer, but got "
<< vElt.toString(false, false)};
}
auto indexVersion = static_cast<IndexVersion>(*vEltAsInt);
if (indexVersion >= IndexVersion::kV2) {
auto status = index_key_validate::validateIndexSpecFieldNames(spec);
if (!status.isOK()) {
return status;
}
}
if (!IndexDescriptor::isIndexVersionSupported(indexVersion)) {
return Status(ErrorCodes::CannotCreateIndex,
str::stream() << "this version of mongod cannot build new indexes "
<< "of version number " << static_cast<int>(indexVersion));
}
if (nss.isOplog())
return Status(ErrorCodes::CannotCreateIndex, "cannot have an index on the oplog");
// logical name of the index
const BSONElement nameElem = spec["name"];
if (nameElem.type() != String)
return Status(ErrorCodes::CannotCreateIndex, "index name must be specified as a string");
const StringData name = nameElem.valueStringData();
if (name.find('\0') != std::string::npos)
return Status(ErrorCodes::CannotCreateIndex, "index name cannot contain NUL bytes");
if (name.empty())
return Status(ErrorCodes::CannotCreateIndex, "index name cannot be empty");
const BSONObj key = spec.getObjectField("key");
const Status keyStatus = index_key_validate::validateKeyPattern(key, indexVersion);
if (!keyStatus.isOK()) {
return Status(ErrorCodes::CannotCreateIndex,
str::stream()
<< "bad index key pattern " << key << ": " << keyStatus.reason());
}
const string pluginName = IndexNames::findPluginName(key);
std::unique_ptr<CollatorInterface> collator;
BSONElement collationElement = spec.getField("collation");
if (collationElement) {
if (collationElement.type() != BSONType::Object) {
return Status(ErrorCodes::CannotCreateIndex,
"\"collation\" for an index must be a document");
}
auto statusWithCollator = CollatorFactoryInterface::get(opCtx->getServiceContext())
->makeFromBSON(collationElement.Obj());
if (!statusWithCollator.isOK()) {
return statusWithCollator.getStatus();
}
collator = std::move(statusWithCollator.getValue());
if (!collator) {
return {ErrorCodes::InternalError,
str::stream() << "An internal operation specified the collation "
<< CollationSpec::kSimpleSpec
<< " explicitly, which should instead be implied by omitting the "
"'collation' field from the index specification"};
}
if (static_cast<IndexVersion>(vElt.numberInt()) < IndexVersion::kV2) {
return {ErrorCodes::CannotCreateIndex,
str::stream() << "Index version " << vElt.fieldNameStringData() << "="
<< vElt.numberInt() << " does not support the '"
<< collationElement.fieldNameStringData() << "' option"};
}
if ((pluginName != IndexNames::BTREE) && (pluginName != IndexNames::GEO_2DSPHERE) &&
(pluginName != IndexNames::HASHED) && (pluginName != IndexNames::WILDCARD)) {
return Status(ErrorCodes::CannotCreateIndex,
str::stream()
<< "Index type '" << pluginName
<< "' does not support collation: " << collator->getSpec().toBSON());
}
}
const bool isSparse = spec["sparse"].trueValue();
if (pluginName == IndexNames::WILDCARD) {
if (isSparse) {
return Status(ErrorCodes::CannotCreateIndex,
str::stream() << "Index type '" << pluginName
<< "' does not support the sparse option");
}
if (spec["unique"].trueValue()) {
return Status(ErrorCodes::CannotCreateIndex,
str::stream() << "Index type '" << pluginName
<< "' does not support the unique option");
}
if (spec.getField("expireAfterSeconds")) {
return Status(ErrorCodes::CannotCreateIndex,
str::stream()
<< "Index type '" << pluginName << "' cannot be a TTL index");
}
}
// Ensure if there is a filter, its valid.
BSONElement filterElement = spec.getField("partialFilterExpression");
if (filterElement) {
if (isSparse) {
return Status(ErrorCodes::CannotCreateIndex,
"cannot mix \"partialFilterExpression\" and \"sparse\" options");
}
if (filterElement.type() != Object) {
return Status(ErrorCodes::CannotCreateIndex,
"\"partialFilterExpression\" for an index must be a document");
}
// The collator must outlive the constructed MatchExpression.
boost::intrusive_ptr<ExpressionContext> expCtx(
new ExpressionContext(opCtx, collator.get()));
// Parsing the partial filter expression is not expected to fail here since the
// expression would have been successfully parsed upstream during index creation.
StatusWithMatchExpression statusWithMatcher =
MatchExpressionParser::parse(filterElement.Obj(),
std::move(expCtx),
ExtensionsCallbackNoop(),
MatchExpressionParser::kBanAllSpecialFeatures);
if (!statusWithMatcher.isOK()) {
return statusWithMatcher.getStatus();
}
const std::unique_ptr<MatchExpression> filterExpr = std::move(statusWithMatcher.getValue());
Status status = _checkValidFilterExpressions(filterExpr.get());
if (!status.isOK()) {
return status;
}
}
if (IndexDescriptor::isIdIndexPattern(key)) {
BSONElement uniqueElt = spec["unique"];
if (uniqueElt && !uniqueElt.trueValue()) {
return Status(ErrorCodes::CannotCreateIndex, "_id index cannot be non-unique");
}
if (filterElement) {
return Status(ErrorCodes::CannotCreateIndex, "_id index cannot be a partial index");
}
if (isSparse) {
return Status(ErrorCodes::CannotCreateIndex, "_id index cannot be sparse");
}
if (collationElement &&
!CollatorInterface::collatorsMatch(collator.get(), _collection->getDefaultCollator())) {
return Status(ErrorCodes::CannotCreateIndex,
"_id index must have the collection default collation");
}
}
// --- only storage engine checks allowed below this ----
BSONElement storageEngineElement = spec.getField("storageEngine");
if (storageEngineElement.eoo()) {
return Status::OK();
}
if (storageEngineElement.type() != mongo::Object) {
return Status(ErrorCodes::CannotCreateIndex,
"\"storageEngine\" options must be a document if present");
}
BSONObj storageEngineOptions = storageEngineElement.Obj();
if (storageEngineOptions.isEmpty()) {
return Status(ErrorCodes::CannotCreateIndex,
"Empty \"storageEngine\" options are invalid. "
"Please remove the field or include valid options.");
}
Status storageEngineStatus = validateStorageOptions(
opCtx->getServiceContext(), storageEngineOptions, [](const auto& x, const auto& y) {
return x->validateIndexStorageOptions(y);
});
if (!storageEngineStatus.isOK()) {
return storageEngineStatus;
}
return Status::OK();
}
Status IndexCatalogImpl::_doesSpecConflictWithExisting(OperationContext* opCtx,
const BSONObj& spec,
const bool includeUnfinishedIndexes) const {
const char* name = spec.getStringField("name");
invariant(name[0]);
const BSONObj key = spec.getObjectField("key");
const BSONObj collation = spec.getObjectField("collation");
{
const IndexDescriptor* desc = findIndexByName(opCtx, name, includeUnfinishedIndexes);
if (desc) {
// index already exists with same name
if (SimpleBSONObjComparator::kInstance.evaluate(desc->keyPattern() == key) &&
SimpleBSONObjComparator::kInstance.evaluate(
desc->infoObj().getObjectField("collation") != collation)) {
// key patterns are equal but collations differ.
return Status(ErrorCodes::IndexOptionsConflict,
str::stream()
<< "An index with the same key pattern, but a different "
<< "collation already exists with the same name. Try again with "
<< "a unique name. "
<< "Existing index: " << desc->infoObj()
<< " Requested index: " << spec);
}
if (SimpleBSONObjComparator::kInstance.evaluate(desc->keyPattern() != key) ||
SimpleBSONObjComparator::kInstance.evaluate(
desc->infoObj().getObjectField("collation") != collation)) {
return Status(ErrorCodes::IndexKeySpecsConflict,
str::stream()
<< "Index must have unique name."
<< "The existing index: " << desc->infoObj()
<< " has the same name as the requested index: " << spec);
}
IndexDescriptor temp(_collection, _getAccessMethodName(key), spec);
if (!desc->areIndexOptionsEquivalent(&temp))
return Status(ErrorCodes::IndexOptionsConflict,
str::stream() << "Index with name: " << name
<< " already exists with different options");
// Index already exists with the same options, so no need to build a new
// one (not an error). Most likely requested by a client using ensureIndex.
return Status(ErrorCodes::IndexAlreadyExists,
str::stream() << "Identical index already exists: " << name);
}
}
{
const IndexDescriptor* desc =
findIndexByKeyPatternAndCollationSpec(opCtx, key, collation, includeUnfinishedIndexes);
if (desc) {
LOG(2) << "Index already exists with a different name: " << name << " pattern: " << key
<< " collation: " << collation;
IndexDescriptor temp(_collection, _getAccessMethodName(key), spec);
if (!desc->areIndexOptionsEquivalent(&temp))
return Status(ErrorCodes::IndexOptionsConflict,
str::stream()
<< "Index: " << spec
<< " already exists with different options: " << desc->infoObj());
return Status(ErrorCodes::IndexOptionsConflict,
str::stream() << "Index with name: " << name
<< " already exists with a different name");
}
}
if (numIndexesTotal(opCtx) >= kMaxNumIndexesAllowed) {
string s = str::stream() << "add index fails, too many indexes for " << _collection->ns()
<< " key:" << key;
log() << s;
return Status(ErrorCodes::CannotCreateIndex, s);
}
// Refuse to build text index if another text index exists or is in progress.
// Collections should only have one text index.
string pluginName = IndexNames::findPluginName(key);
if (pluginName == IndexNames::TEXT) {
vector<const IndexDescriptor*> textIndexes;
findIndexByType(opCtx, IndexNames::TEXT, textIndexes, includeUnfinishedIndexes);
if (textIndexes.size() > 0) {
return Status(ErrorCodes::CannotCreateIndex,
str::stream() << "only one text index per collection allowed, "
<< "found existing text index \""
<< textIndexes[0]->indexName() << "\"");
}
}
return Status::OK();
}
BSONObj IndexCatalogImpl::getDefaultIdIndexSpec() const {
dassert(_idObj["_id"].type() == NumberInt);
const auto indexVersion = IndexDescriptor::getDefaultIndexVersion();
BSONObjBuilder b;
b.append("v", static_cast<int>(indexVersion));
b.append("name", "_id_");
b.append("key", _idObj);
if (_collection->getDefaultCollator() && indexVersion >= IndexVersion::kV2) {
// Creating an index with the "collation" option requires a v=2 index.
b.append("collation", _collection->getDefaultCollator()->getSpec().toBSON());
}
return b.obj();
}
void IndexCatalogImpl::dropAllIndexes(OperationContext* opCtx,
bool includingIdIndex,
std::function<void(const IndexDescriptor*)> onDropFn) {
invariant(opCtx->lockState()->isCollectionLockedForMode(_collection->ns(), MODE_X));
uassert(ErrorCodes::BackgroundOperationInProgressForNamespace,
str::stream() << "cannot perform operation: an index build is currently running",
!haveAnyIndexesInProgress());
bool haveIdIndex = false;
invariant(_buildingIndexes.size() == 0);
vector<string> indexNamesToDrop;
{
int seen = 0;
std::unique_ptr<IndexIterator> ii = getIndexIterator(opCtx, true);
while (ii->more()) {
seen++;
const IndexDescriptor* desc = ii->next()->descriptor();
if (desc->isIdIndex() && includingIdIndex == false) {
haveIdIndex = true;
continue;
}
indexNamesToDrop.push_back(desc->indexName());
}
invariant(seen == numIndexesTotal(opCtx));
}
for (size_t i = 0; i < indexNamesToDrop.size(); i++) {
string indexName = indexNamesToDrop[i];
const IndexDescriptor* desc = findIndexByName(opCtx, indexName, true);
invariant(desc);
LOG(1) << "\t dropAllIndexes dropping: " << desc->toString();
IndexCatalogEntry* entry = _readyIndexes.find(desc);
invariant(entry);
// If the onDrop function creates an oplog entry, it should run first so that the drop is
// timestamped at the same optime.
if (onDropFn) {
onDropFn(desc);
}
invariant(dropIndexEntry(opCtx, entry).isOK());
}
// verify state is sane post cleaning
long long numIndexesInCollectionCatalogEntry =
DurableCatalog::get(opCtx)->getTotalIndexCount(opCtx, _collection->getCatalogId());
if (haveIdIndex) {
fassert(17324, numIndexesTotal(opCtx) == 1);
fassert(17325, numIndexesReady(opCtx) == 1);
fassert(17326, numIndexesInCollectionCatalogEntry == 1);
fassert(17336, _readyIndexes.size() == 1);
} else {
if (numIndexesTotal(opCtx) || numIndexesInCollectionCatalogEntry || _readyIndexes.size()) {
_logInternalState(
opCtx, numIndexesInCollectionCatalogEntry, indexNamesToDrop, haveIdIndex);
}
fassert(17327, numIndexesTotal(opCtx) == 0);
fassert(17328, numIndexesInCollectionCatalogEntry == 0);
fassert(17337, _readyIndexes.size() == 0);
}
}
void IndexCatalogImpl::dropAllIndexes(OperationContext* opCtx, bool includingIdIndex) {
dropAllIndexes(opCtx, includingIdIndex, {});
}
Status IndexCatalogImpl::dropIndex(OperationContext* opCtx, const IndexDescriptor* desc) {
invariant(opCtx->lockState()->isCollectionLockedForMode(_collection->ns(), MODE_X));
invariant(!haveAnyIndexesInProgress());
IndexCatalogEntry* entry = _readyIndexes.find(desc);
if (!entry)
return Status(ErrorCodes::InternalError, "cannot find index to delete");
if (!entry->isReady(opCtx))
return Status(ErrorCodes::InternalError, "cannot delete not ready index");
return dropIndexEntry(opCtx, entry);
}
Status IndexCatalogImpl::dropUnfinishedIndex(OperationContext* opCtx, const IndexDescriptor* desc) {
invariant(opCtx->lockState()->isCollectionLockedForMode(_collection->ns(), MODE_X));
IndexCatalogEntry* entry = _buildingIndexes.find(desc);
if (!entry)
return Status(ErrorCodes::InternalError, "cannot find index to delete");
if (entry->isReady(opCtx))
return Status(ErrorCodes::InternalError, "expected unfinished index, but it is ready");
return dropIndexEntry(opCtx, entry);
}
namespace {
class IndexRemoveChange final : public RecoveryUnit::Change {
public:
IndexRemoveChange(OperationContext* opCtx,
Collection* collection,
IndexCatalogEntryContainer* entries,
std::shared_ptr<IndexCatalogEntry> entry)
: _opCtx(opCtx), _collection(collection), _entries(entries), _entry(std::move(entry)) {}
void commit(boost::optional<Timestamp> commitTime) final {
// Ban reading from this collection on committed reads on snapshots before now.
if (!commitTime) {
// This is called when we refresh the index catalog entry, which does not always have
// a commit timestamp. We use the cluster time since it's guaranteed to be greater
// than the time of the index removal. It is possible the cluster time could be in the
// future, and we will need to do another write to reach the minimum visible snapshot.
commitTime = LogicalClock::getClusterTimeForReplicaSet(_opCtx).asTimestamp();
}
_entry->setDropped();
_collection->setMinimumVisibleSnapshot(commitTime.get());
}
void rollback() final {
auto indexDescriptor = _entry->descriptor();
_entries->add(std::move(_entry));
// Refresh the CollectionQueryInfo's knowledge of what indices are present. This must be
// done after re-adding our IndexCatalogEntry to the '_entries' list, since 'addedIndex()'
// refreshes its knowledge by iterating the list of indices currently in the catalog.
CollectionQueryInfo::get(_collection).addedIndex(_opCtx, indexDescriptor);
}
private:
OperationContext* _opCtx;
Collection* _collection;
IndexCatalogEntryContainer* _entries;
std::shared_ptr<IndexCatalogEntry> _entry;
};
} // namespace
Status IndexCatalogImpl::dropIndexEntry(OperationContext* opCtx, IndexCatalogEntry* entry) {
invariant(entry);
invariant(opCtx->lockState()->isCollectionLockedForMode(_collection->ns(), MODE_X));
// Pulling indexName out as it is needed post descriptor release.
string indexName = entry->descriptor()->indexName();
audit::logDropIndex(&cc(), indexName, _collection->ns().ns());
auto released = _readyIndexes.release(entry->descriptor());
if (released) {
invariant(released.get() == entry);
opCtx->recoveryUnit()->registerChange(std::make_unique<IndexRemoveChange>(
opCtx, _collection, &_readyIndexes, std::move(released)));
} else {
released = _buildingIndexes.release(entry->descriptor());
invariant(released.get() == entry);
opCtx->recoveryUnit()->registerChange(std::make_unique<IndexRemoveChange>(
opCtx, _collection, &_buildingIndexes, std::move(released)));
}
CollectionQueryInfo::get(_collection).droppedIndex(opCtx, indexName);
entry = nullptr;
deleteIndexFromDisk(opCtx, indexName);
return Status::OK();
}
void IndexCatalogImpl::deleteIndexFromDisk(OperationContext* opCtx, const string& indexName) {
invariant(opCtx->lockState()->isCollectionLockedForMode(_collection->ns(), MODE_X));
Status status =
DurableCatalog::get(opCtx)->removeIndex(opCtx, _collection->getCatalogId(), indexName);
if (status.code() == ErrorCodes::NamespaceNotFound) {
/*
* This is ok, as we may be partially through index creation.
*/
} else if (!status.isOK()) {
warning() << "couldn't drop index " << indexName << " on collection: " << _collection->ns()
<< " because of " << redact(status);
}
}
bool IndexCatalogImpl::isMultikey(const IndexDescriptor* const idx) {
IndexCatalogEntry* entry = _readyIndexes.find(idx);
invariant(entry);
return entry->isMultikey();
}
MultikeyPaths IndexCatalogImpl::getMultikeyPaths(OperationContext* opCtx,
const IndexDescriptor* idx) {
IndexCatalogEntry* entry = _readyIndexes.find(idx);
invariant(entry);