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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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kSharding
#include "mongo/platform/basic.h"
#include "mongo/db/auth/action_set.h"
#include "mongo/db/auth/action_type.h"
#include "mongo/db/auth/authorization_manager.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/client.h"
#include "mongo/db/commands.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/db/s/migration_source_manager.h"
#include "mongo/db/s/operation_sharding_state.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/s/catalog_cache_loader.h"
#include "mongo/s/grid.h"
#include "mongo/s/request_types/flush_routing_table_cache_updates_gen.h"
#include "mongo/util/log.h"
namespace mongo {
namespace {
class FlushRoutingTableCacheUpdates : public BasicCommand {
public:
// Support deprecated name 'forceRoutingTableRefresh' for backwards compatibility with 3.6.0.
FlushRoutingTableCacheUpdates()
: BasicCommand("_flushRoutingTableCacheUpdates", "forceRoutingTableRefresh") {}
void help(std::stringstream& help) const override {
help << "Internal command which waits for any pending routing table cache updates for a "
"particular namespace to be written locally. The operationTime returned in the "
"response metadata is guaranteed to be at least as late as the last routing table "
"cache update to the local disk. Takes a 'forceRemoteRefresh' option to make this "
"node refresh its cache from the config server before waiting for the last refresh "
"to be persisted.";
}
bool adminOnly() const override {
return true;
}
bool slaveOk() const override {
return false;
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
std::string parseNs(const std::string& dbname, const BSONObj& cmdObj) const override {
return parseNsFullyQualified(dbname, cmdObj);
}
Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) override {
if (!AuthorizationSession::get(client)->isAuthorizedForActionsOnResource(
ResourcePattern::forClusterResource(), ActionType::internal)) {
return Status(ErrorCodes::Unauthorized, "Unauthorized");
}
return Status::OK();
}
void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) override {
ActionSet actions;
actions.addAction(ActionType::internal);
out->push_back(Privilege(ResourcePattern::forClusterResource(), actions));
}
bool run(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
auto const shardingState = ShardingState::get(opCtx);
uassertStatusOK(shardingState->canAcceptShardedCommands());
uassert(ErrorCodes::IllegalOperation,
"Can't issue _flushRoutingTableCacheUpdates from 'eval'",
!opCtx->getClient()->isInDirectClient());
uassert(ErrorCodes::IllegalOperation,
"Can't call _flushRoutingTableCacheUpdates if in read-only mode",
!storageGlobalParams.readOnly);
auto& oss = OperationShardingState::get(opCtx);
const NamespaceString nss(parseNs(dbname, cmdObj));
const auto request = _flushRoutingTableCacheUpdatesRequest::parse(
IDLParserErrorContext("_FlushRoutingTableCacheUpdatesRequest"), cmdObj);
{
AutoGetCollection autoColl(opCtx, nss, MODE_IS);
// If the primary is in the critical section, secondaries must wait for the commit to
// finish on the primary in case a secondary's caller has an afterClusterTime inclusive
// of the commit (and new writes to the committed chunk) that hasn't yet propagated back
// to this shard. This ensures the read your own writes causal consistency guarantee.
auto css = CollectionShardingState::get(opCtx, nss);
if (css->getMigrationSourceManager()) {
auto criticalSectionSignal =
css->getMigrationSourceManager()->getMigrationCriticalSectionSignal(true);
if (criticalSectionSignal) {
oss.setMigrationCriticalSectionSignal(criticalSectionSignal);
}
}
}
oss.waitForMigrationCriticalSectionSignal(opCtx);
if (request.getSyncFromConfig()) {
LOG(1) << "Forcing remote routing table refresh for " << nss;
ChunkVersion unusedShardVersion;
uassertStatusOK(shardingState->refreshMetadataNow(opCtx, nss, &unusedShardVersion));
}
CatalogCacheLoader::get(opCtx).waitForCollectionFlush(opCtx, nss);
repl::ReplClientInfo::forClient(opCtx->getClient()).setLastOpToSystemLastOpTime(opCtx);
return true;
}
} _flushRoutingTableCacheUpdatesCmd;
} // namespace
} // namespace mongo
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