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/**
* Copyright (C) 2017 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/catalog_raii.h"
#include "mongo/db/catalog/database_holder.h"
#include "mongo/db/catalog/uuid_catalog.h"
#include "mongo/util/fail_point_service.h"
namespace mongo {
namespace {
MONGO_FP_DECLARE(setAutoGetCollectionWait);
} // namespace
AutoGetDb::AutoGetDb(OperationContext* opCtx, StringData ns, LockMode mode)
: _dbLock(opCtx, ns, mode), _db(dbHolder().get(opCtx, ns)) {}
AutoGetDb::AutoGetDb(OperationContext* opCtx, StringData ns, Lock::DBLock lock)
: _dbLock(std::move(lock)), _db(dbHolder().get(opCtx, ns)) {}
AutoGetCollection::AutoGetCollection(OperationContext* opCtx,
const NamespaceString& nss,
const UUID& uuid,
LockMode modeAll)
: _viewMode(ViewMode::kViewsForbidden),
_autoDb(opCtx, nss.db(), Lock::DBLock(opCtx, nss.db(), modeAll)),
_collLock(opCtx->lockState(), nss.ns(), modeAll),
_coll(UUIDCatalog::get(opCtx).lookupCollectionByUUID(uuid)) {
// Wait for a configured amount of time after acquiring locks if the failpoint is enabled
MONGO_FAIL_POINT_BLOCK(setAutoGetCollectionWait, customWait) {
const BSONObj& data = customWait.getData();
sleepFor(Milliseconds(data["waitForMillis"].numberInt()));
}
}
AutoGetCollection::AutoGetCollection(OperationContext* opCtx,
const NamespaceString& nss,
LockMode modeColl,
ViewMode viewMode,
Lock::DBLock lock)
: _viewMode(viewMode),
_autoDb(opCtx, nss.db(), std::move(lock)),
_collLock(opCtx->lockState(), nss.ns(), modeColl),
_coll(_autoDb.getDb() ? _autoDb.getDb()->getCollection(opCtx, nss) : nullptr) {
Database* const db = _autoDb.getDb();
// If the database exists, but not the collection, check for views
if (_viewMode == ViewMode::kViewsForbidden && db && !_coll &&
db->getViewCatalog()->lookup(opCtx, nss.ns())) {
uasserted(ErrorCodes::CommandNotSupportedOnView,
str::stream() << "Namespace " << nss.ns() << " is a view, not a collection");
}
// Wait for a configured amount of time after acquiring locks if the failpoint is enabled
MONGO_FAIL_POINT_BLOCK(setAutoGetCollectionWait, customWait) {
const BSONObj& data = customWait.getData();
sleepFor(Milliseconds(data["waitForMillis"].numberInt()));
}
}
AutoGetCollection::AutoGetCollection(OperationContext* opCtx,
const NamespaceString& nss,
LockMode modeDB,
LockMode modeColl,
ViewMode viewMode)
: AutoGetCollection(opCtx, nss, modeColl, viewMode, Lock::DBLock(opCtx, nss.db(), modeDB)) {}
AutoGetCollectionOrView::AutoGetCollectionOrView(OperationContext* opCtx,
const NamespaceString& nss,
LockMode modeAll)
: _autoColl(opCtx, nss, modeAll, modeAll, AutoGetCollection::ViewMode::kViewsPermitted),
_view(_autoColl.getDb() && !_autoColl.getCollection()
? _autoColl.getDb()->getViewCatalog()->lookup(opCtx, nss.ns())
: nullptr) {}
AutoGetOrCreateDb::AutoGetOrCreateDb(OperationContext* opCtx, StringData ns, LockMode mode)
: _dbLock(opCtx, ns, mode), _db(dbHolder().get(opCtx, ns)) {
invariant(mode == MODE_IX || mode == MODE_X);
_justCreated = false;
// If the database didn't exist, relock in MODE_X
if (_db == NULL) {
if (mode != MODE_X) {
_dbLock.relockWithMode(MODE_X);
}
_db = dbHolder().openDb(opCtx, ns);
_justCreated = true;
}
}
} // namespace mongo
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