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/**
* Copyright (C) 2020-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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/catalog/database.h"
#include "mongo/db/catalog_raii.h"
#include "mongo/db/concurrency/exception_util.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/dbhelpers.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/ops/delete.h"
#include "mongo/db/ops/update.h"
#include "mongo/db/ops/update_request.h"
#include "mongo/db/repl/tenant_migration_recipient_entry_helpers.h"
#include "mongo/db/repl/tenant_migration_state_machine_gen.h"
#include "mongo/db/shard_role.h"
#include "mongo/db/storage/write_unit_of_work.h"
#include "mongo/util/str.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kTenantMigration
namespace mongo {
namespace repl {
namespace tenantMigrationRecipientEntryHelpers {
Status insertStateDoc(OperationContext* opCtx, const TenantMigrationRecipientDocument& stateDoc) {
const auto nss = NamespaceString::kTenantMigrationRecipientsNamespace;
auto collection = acquireCollection(
opCtx,
CollectionAcquisitionRequest(NamespaceString(nss),
PlacementConcern{boost::none, ShardVersion::UNSHARDED()},
repl::ReadConcernArgs::get(opCtx),
AcquisitionPrerequisites::kWrite),
MODE_IX);
// Sanity check
uassert(ErrorCodes::PrimarySteppedDown,
str::stream() << "No longer primary while attempting to insert tenant migration "
"recipient state document",
repl::ReplicationCoordinator::get(opCtx)->canAcceptWritesFor(opCtx, nss));
return writeConflictRetry(
opCtx, "insertTenantMigrationRecipientStateDoc", nss, [&]() -> Status {
// Insert the 'stateDoc' if no active tenant migration found for the 'tenantId' provided
// in the 'stateDoc'. Tenant Migration is considered as active for a tenantId if a state
// document exists on the disk for that 'tenantId' and not marked to be garbage
// collected (i.e, 'expireAt' not set).
const auto filter = BSON(TenantMigrationRecipientDocument::kTenantIdFieldName
<< stateDoc.getTenantId().toString()
<< TenantMigrationRecipientDocument::kExpireAtFieldName
<< BSON("$exists" << false));
const auto updateMod = BSON("$setOnInsert" << stateDoc.toBSON());
auto updateResult =
Helpers::upsert(opCtx, collection, filter, updateMod, /*fromMigrate=*/false);
// '$setOnInsert' update operator can no way modify the existing on-disk state doc.
invariant(!updateResult.numDocsModified);
if (updateResult.upsertedId.isEmpty()) {
return {ErrorCodes::ConflictingOperationInProgress,
str::stream() << "Failed to insert the state doc: "
<< tenant_migration_util::redactStateDoc(stateDoc.toBSON())
<< "; Found active tenant migration for tenantId: "
<< stateDoc.getTenantId()};
}
return Status::OK();
});
}
Status updateStateDoc(OperationContext* opCtx, const TenantMigrationRecipientDocument& stateDoc) {
const auto nss = NamespaceString::kTenantMigrationRecipientsNamespace;
auto collection = acquireCollection(
opCtx,
CollectionAcquisitionRequest(NamespaceString(nss),
PlacementConcern{boost::none, ShardVersion::UNSHARDED()},
repl::ReadConcernArgs::get(opCtx),
AcquisitionPrerequisites::kWrite),
MODE_IX);
if (!collection.exists()) {
return Status(ErrorCodes::NamespaceNotFound,
str::stream() << nss.toStringForErrorMsg() << " does not exist");
}
return writeConflictRetry(
opCtx, "updateTenantMigrationRecipientStateDoc", nss, [&]() -> Status {
auto updateResult =
Helpers::upsert(opCtx, collection, stateDoc.toBSON(), /*fromMigrate=*/false);
if (updateResult.numMatched == 0) {
return {ErrorCodes::NoSuchKey,
str::stream()
<< "Existing tenant migration state document not found for id: "
<< stateDoc.getId()};
}
return Status::OK();
});
}
StatusWith<bool> deleteStateDocIfMarkedAsGarbageCollectable(OperationContext* opCtx,
StringData tenantId) {
const auto nss = NamespaceString::kTenantMigrationRecipientsNamespace;
const auto collection = acquireCollection(
opCtx,
CollectionAcquisitionRequest(NamespaceString(nss),
PlacementConcern{boost::none, ShardVersion::UNSHARDED()},
repl::ReadConcernArgs::get(opCtx),
AcquisitionPrerequisites::kWrite),
MODE_IX);
if (!collection.exists()) {
return Status(ErrorCodes::NamespaceNotFound,
str::stream() << nss.toStringForErrorMsg() << " does not exist");
}
auto query = BSON(TenantMigrationRecipientDocument::kTenantIdFieldName
<< tenantId << TenantMigrationRecipientDocument::kExpireAtFieldName
<< BSON("$exists" << 1));
return writeConflictRetry(opCtx, "deleteTenantMigrationRecipientStateDoc", nss, [&]() -> bool {
auto nDeleted = deleteObjects(opCtx, collection, query, true /* justOne */);
return nDeleted > 0;
});
}
StatusWith<TenantMigrationRecipientDocument> getStateDoc(OperationContext* opCtx,
const UUID& migrationUUID) {
// Read the most up to date data.
ReadSourceScope readSourceScope(opCtx, RecoveryUnit::ReadSource::kNoTimestamp);
AutoGetCollectionForRead collection(opCtx,
NamespaceString::kTenantMigrationRecipientsNamespace);
if (!collection) {
return Status(ErrorCodes::NamespaceNotFound,
str::stream() << "Collection not found: "
<< NamespaceString::kTenantMigrationRecipientsNamespace
.toStringForErrorMsg());
}
BSONObj result;
auto foundDoc =
Helpers::findOne(opCtx, collection.getCollection(), BSON("_id" << migrationUUID), result);
if (!foundDoc) {
return Status(ErrorCodes::NoMatchingDocument,
str::stream() << "No matching state doc found with tenant migration UUID: "
<< migrationUUID);
}
try {
return TenantMigrationRecipientDocument::parse(IDLParserContext("recipientStateDoc"),
result);
} catch (DBException& ex) {
return ex.toStatus(
str::stream() << "Invalid BSON found for matching document with tenant migration UUID: "
<< migrationUUID << " , res: " << result);
}
}
} // namespace tenantMigrationRecipientEntryHelpers
} // namespace repl
} // namespace mongo
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