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|
/**
* Copyright (C) 2012-2015 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::kCommand
#include "mongo/platform/basic.h"
#include <array>
#include <boost/optional.hpp>
#include <time.h>
#include "mongo/base/disallow_copying.h"
#include "mongo/base/status.h"
#include "mongo/base/status_with.h"
#include "mongo/bson/util/builder.h"
#include "mongo/db/audit.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/impersonation_session.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/auth/user_management_commands_parser.h"
#include "mongo/db/auth/user_name.h"
#include "mongo/db/background.h"
#include "mongo/db/catalog/coll_mod.h"
#include "mongo/db/catalog/collection.h"
#include "mongo/db/catalog/collection_catalog_entry.h"
#include "mongo/db/catalog/create_collection.h"
#include "mongo/db/catalog/drop_collection.h"
#include "mongo/db/catalog/drop_database.h"
#include "mongo/db/clientcursor.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/server_status.h"
#include "mongo/db/commands/shutdown.h"
#include "mongo/db/concurrency/write_conflict_exception.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/dbdirectclient.h"
#include "mongo/db/dbhelpers.h"
#include "mongo/db/exec/working_set_common.h"
#include "mongo/db/index/index_access_method.h"
#include "mongo/db/index/index_descriptor.h"
#include "mongo/db/index_builder.h"
#include "mongo/db/instance.h"
#include "mongo/db/introspect.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/json.h"
#include "mongo/db/keypattern.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/matcher/extensions_callback_disallow_extensions.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/op_observer.h"
#include "mongo/db/ops/insert.h"
#include "mongo/db/pipeline/pipeline.h"
#include "mongo/db/query/get_executor.h"
#include "mongo/db/query/internal_plans.h"
#include "mongo/db/query/query_planner.h"
#include "mongo/db/read_concern.h"
#include "mongo/db/repair_database.h"
#include "mongo/db/repl/optime.h"
#include "mongo/db/repl/read_concern_args.h"
#include "mongo/db/repl/repl_client_info.h"
#include "mongo/db/repl/repl_settings.h"
#include "mongo/db/repl/replication_coordinator_global.h"
#include "mongo/db/s/operation_sharding_state.h"
#include "mongo/db/s/sharding_state.h"
#include "mongo/db/stats/storage_stats.h"
#include "mongo/db/write_concern.h"
#include "mongo/rpc/metadata.h"
#include "mongo/rpc/metadata/config_server_metadata.h"
#include "mongo/rpc/metadata/repl_set_metadata.h"
#include "mongo/rpc/metadata/server_selection_metadata.h"
#include "mongo/rpc/metadata/sharding_metadata.h"
#include "mongo/rpc/reply_builder_interface.h"
#include "mongo/rpc/request_interface.h"
#include "mongo/s/chunk_version.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/grid.h"
#include "mongo/s/stale_exception.h"
#include "mongo/scripting/engine.h"
#include "mongo/util/fail_point_service.h"
#include "mongo/util/log.h"
#include "mongo/util/md5.hpp"
#include "mongo/util/print.h"
#include "mongo/util/scopeguard.h"
namespace mongo {
using std::endl;
using std::ostringstream;
using std::string;
using std::stringstream;
using std::unique_ptr;
namespace {
/**
* Checks for additional required privileges when creating or modifying a view. Call this function
* after verifying that the user has the "createCollection" or "collMod" action, respectively.
*
* 'cmdObj' must have a String field named 'viewOn'.
*/
Status canCreateOrModifyView(Client* client,
const std::string& dbname,
const BSONObj& cmdObj,
ResourcePattern resource) {
AuthorizationSession* authzSession = AuthorizationSession::get(client);
// It's safe to allow a user to create or modify a view if they can't read it anyway.
if (!authzSession->isAuthorizedForActionsOnResource(resource, ActionType::find)) {
return Status::OK();
}
// The user can read the view they're trying to create/modify, so we must ensure that they also
// have the find action on all namespaces in "viewOn" and "pipeline". If "pipeline" is not
// specified, default to the empty pipeline.
auto viewPipeline =
cmdObj.hasField("pipeline") ? BSONArray(cmdObj["pipeline"].Obj()) : BSONArray();
// This check ignores some invalid pipeline specifications. For example, if a user specifies a
// view definition with an invalid specification like {$lookup: "blah"}, the authorization check
// will succeed but the pipeline will fail to parse later in Command::run().
return Pipeline::checkAuthForCommand(
client,
dbname,
BSON("aggregate" << cmdObj["viewOn"].checkAndGetStringData() << "pipeline"
<< viewPipeline));
}
} // namespace
class CmdShutdownMongoD : public CmdShutdown {
public:
virtual void help(stringstream& help) const {
help << "shutdown the database. must be ran against admin db and "
<< "either (1) ran from localhost or (2) authenticated. If "
<< "this is a primary in a replica set and there is no member "
<< "within 10 seconds of its optime, it will not shutdown "
<< "without force : true. You can also specify timeoutSecs : "
<< "N to wait N seconds for other members to catch up.";
}
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int options,
string& errmsg,
BSONObjBuilder& result) {
bool force = cmdObj.hasField("force") && cmdObj["force"].trueValue();
long long timeoutSecs = 0;
if (cmdObj.hasField("timeoutSecs")) {
timeoutSecs = cmdObj["timeoutSecs"].numberLong();
}
Status status = repl::getGlobalReplicationCoordinator()->stepDown(
txn, force, Seconds(timeoutSecs), Seconds(120));
if (!status.isOK() && status.code() != ErrorCodes::NotMaster) { // ignore not master
return appendCommandStatus(result, status);
}
// Never returns
shutdownHelper();
return true;
}
} cmdShutdownMongoD;
class CmdDropDatabase : public Command {
public:
virtual void help(stringstream& help) const {
help << "drop (delete) this database";
}
virtual bool slaveOk() const {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::dropDatabase);
out->push_back(Privilege(ResourcePattern::forDatabaseName(dbname), actions));
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
CmdDropDatabase() : Command("dropDatabase") {}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
// disallow dropping the config database
if (serverGlobalParams.clusterRole == ClusterRole::ConfigServer && (dbname == "config")) {
return appendCommandStatus(result,
Status(ErrorCodes::IllegalOperation,
"Cannot drop 'config' database if mongod started "
"with --configsvr"));
}
if ((repl::getGlobalReplicationCoordinator()->getReplicationMode() !=
repl::ReplicationCoordinator::modeNone) &&
(dbname == "local")) {
return appendCommandStatus(result,
Status(ErrorCodes::IllegalOperation,
"Cannot drop 'local' database while replication "
"is active"));
}
BSONElement e = cmdObj.firstElement();
int p = (int)e.number();
if (p != 1) {
return appendCommandStatus(
result, Status(ErrorCodes::IllegalOperation, "have to pass 1 as db parameter"));
}
Status status = dropDatabase(txn, dbname);
if (status == ErrorCodes::NamespaceNotFound) {
return appendCommandStatus(result, Status::OK());
}
if (status.isOK()) {
result.append("dropped", dbname);
}
return appendCommandStatus(result, status);
}
} cmdDropDatabase;
class CmdRepairDatabase : public Command {
public:
virtual bool slaveOk() const {
return true;
}
virtual bool maintenanceMode() const {
return true;
}
virtual void help(stringstream& help) const {
help << "repair database. also compacts. note: slow.";
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::repairDatabase);
out->push_back(Privilege(ResourcePattern::forDatabaseName(dbname), actions));
}
CmdRepairDatabase() : Command("repairDatabase") {}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
BSONElement e = cmdObj.firstElement();
if (e.numberInt() != 1) {
errmsg = "bad option";
return false;
}
// TODO: SERVER-4328 Don't lock globally
ScopedTransaction transaction(txn, MODE_X);
Lock::GlobalWrite lk(txn->lockState());
// TODO (Kal): OldClientContext legacy, needs to be removed
{
CurOp::get(txn)->ensureStarted();
stdx::lock_guard<Client> lk(*txn->getClient());
CurOp::get(txn)->setNS_inlock(dbname);
}
log() << "repairDatabase " << dbname;
BackgroundOperation::assertNoBgOpInProgForDb(dbname);
e = cmdObj.getField("preserveClonedFilesOnFailure");
bool preserveClonedFilesOnFailure = e.isBoolean() && e.boolean();
e = cmdObj.getField("backupOriginalFiles");
bool backupOriginalFiles = e.isBoolean() && e.boolean();
StorageEngine* engine = getGlobalServiceContext()->getGlobalStorageEngine();
bool shouldReplicateWrites = txn->writesAreReplicated();
txn->setReplicatedWrites(false);
ON_BLOCK_EXIT(&OperationContext::setReplicatedWrites, txn, shouldReplicateWrites);
Status status =
repairDatabase(txn, engine, dbname, preserveClonedFilesOnFailure, backupOriginalFiles);
// Open database before returning
dbHolder().openDb(txn, dbname);
return appendCommandStatus(result, status);
}
} cmdRepairDatabase;
/* set db profiling level
todo: how do we handle profiling information put in the db with replication?
sensibly or not?
*/
class CmdProfile : public Command {
public:
virtual bool slaveOk() const {
return true;
}
virtual void help(stringstream& help) const {
help << "enable or disable performance profiling\n";
help << "{ profile : <n> }\n";
help << "0=off 1=log slow ops 2=log all\n";
help << "-1 to get current values\n";
help << "http://docs.mongodb.org/manual/reference/command/profile/#dbcmd.profile";
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) {
AuthorizationSession* authzSession = AuthorizationSession::get(client);
if (cmdObj.firstElement().numberInt() == -1 && !cmdObj.hasField("slowms")) {
// If you just want to get the current profiling level you can do so with just
// read access to system.profile, even if you can't change the profiling level.
if (authzSession->isAuthorizedForActionsOnResource(
ResourcePattern::forExactNamespace(NamespaceString(dbname, "system.profile")),
ActionType::find)) {
return Status::OK();
}
}
if (authzSession->isAuthorizedForActionsOnResource(ResourcePattern::forDatabaseName(dbname),
ActionType::enableProfiler)) {
return Status::OK();
}
return Status(ErrorCodes::Unauthorized, "unauthorized");
}
CmdProfile() : Command("profile") {}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int options,
string& errmsg,
BSONObjBuilder& result) {
BSONElement firstElement = cmdObj.firstElement();
int profilingLevel = firstElement.numberInt();
// If profilingLevel is 0, 1, or 2, needs to be locked exclusively,
// because creates the system.profile collection in the local database.
const bool readOnly = (profilingLevel < 0 || profilingLevel > 2);
const LockMode dbMode = readOnly ? MODE_S : MODE_X;
const LockMode transactionMode = readOnly ? MODE_IS : MODE_IX;
Status status = Status::OK();
ScopedTransaction transaction(txn, transactionMode);
AutoGetDb ctx(txn, dbname, dbMode);
Database* db = ctx.getDb();
result.append("was", db ? db->getProfilingLevel() : serverGlobalParams.defaultProfile);
result.append("slowms", serverGlobalParams.slowMS);
if (!readOnly) {
if (!db) {
// When setting the profiling level, create the database if it didn't already exist.
// When just reading the profiling level, we do not create the database.
db = dbHolder().openDb(txn, dbname);
}
status = db->setProfilingLevel(txn, profilingLevel);
}
const BSONElement slow = cmdObj["slowms"];
if (slow.isNumber()) {
serverGlobalParams.slowMS = slow.numberInt();
}
if (!status.isOK()) {
errmsg = status.reason();
}
return status.isOK();
}
} cmdProfile;
class CmdDiagLogging : public Command {
public:
virtual bool slaveOk() const {
return true;
}
CmdDiagLogging() : Command("diagLogging") {}
bool adminOnly() const {
return true;
}
void help(stringstream& h) const {
h << "http://dochub.mongodb.org/core/"
"monitoring#MonitoringandDiagnostics-DatabaseRecord%2FReplay%28diagLoggingcommand%29";
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::diagLogging);
out->push_back(Privilege(ResourcePattern::forClusterResource(), actions));
}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
const char* deprecationWarning =
"CMD diagLogging is deprecated and will be removed in a future release";
warning() << deprecationWarning << startupWarningsLog;
// This doesn't look like it requires exclusive DB lock, because it uses its own diag
// locking, but originally the lock was set to be WRITE, so preserving the behaviour.
//
ScopedTransaction transaction(txn, MODE_IX);
Lock::DBLock dbXLock(txn->lockState(), dbname, MODE_X);
// TODO (Kal): OldClientContext legacy, needs to be removed
{
CurOp::get(txn)->ensureStarted();
stdx::lock_guard<Client> lk(*txn->getClient());
CurOp::get(txn)->setNS_inlock(dbname);
}
int was = _diaglog.setLevel(cmdObj.firstElement().numberInt());
_diaglog.flush();
if (!serverGlobalParams.quiet) {
LOG(0) << "CMD: diagLogging set to " << _diaglog.getLevel() << " from: " << was << endl;
}
result.append("was", was);
result.append("note", deprecationWarning);
return true;
}
} cmddiaglogging;
/* drop collection */
class CmdDrop : public Command {
public:
CmdDrop() : Command("drop") {}
virtual bool slaveOk() const {
return false;
}
virtual bool adminOnly() const {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::dropCollection);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
virtual void help(stringstream& help) const {
help << "drop a collection\n{drop : <collectionName>}";
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
const NamespaceString nsToDrop = parseNsCollectionRequired(dbname, cmdObj);
if (NamespaceString::virtualized(nsToDrop.ns())) {
errmsg = "can't drop a virtual collection";
return false;
}
if ((repl::getGlobalReplicationCoordinator()->getReplicationMode() !=
repl::ReplicationCoordinator::modeNone) &&
nsToDrop.isOplog()) {
errmsg = "can't drop live oplog while replicating";
return false;
}
return appendCommandStatus(result, dropCollection(txn, nsToDrop, result));
}
} cmdDrop;
/* create collection */
class CmdCreate : public Command {
public:
CmdCreate() : Command("create") {}
virtual bool slaveOk() const {
return false;
}
virtual bool adminOnly() const {
return false;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
virtual void help(stringstream& help) const {
help << "create a collection explicitly\n"
"{ create: <ns>[, capped: <bool>, size: <collSizeInBytes>, max: <nDocs>] }";
}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) {
AuthorizationSession* authzSession = AuthorizationSession::get(client);
auto cmdNsResource = parseResourcePattern(dbname, cmdObj);
if (cmdObj["capped"].trueValue()) {
if (!authzSession->isAuthorizedForActionsOnResource(cmdNsResource,
ActionType::convertToCapped)) {
return Status(ErrorCodes::Unauthorized, "unauthorized");
}
}
const bool hasCreateCollectionAction = authzSession->isAuthorizedForActionsOnResource(
cmdNsResource, ActionType::createCollection);
// If attempting to create a view, check for additional required privileges.
if (cmdObj["viewOn"]) {
// You need the createCollection action on this namespace; the insert action is not
// sufficient.
if (!hasCreateCollectionAction) {
return Status(ErrorCodes::Unauthorized, "unauthorized");
}
return canCreateOrModifyView(client, dbname, cmdObj, cmdNsResource);
}
// To create a regular collection, ActionType::createCollection or ActionType::insert are
// both acceptable.
if (hasCreateCollectionAction ||
authzSession->isAuthorizedForActionsOnResource(cmdNsResource, ActionType::insert)) {
return Status::OK();
}
return Status(ErrorCodes::Unauthorized, "unauthorized");
}
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
if (cmdObj.hasField("autoIndexId")) {
const char* deprecationWarning =
"the autoIndexId option is deprecated and will be removed in a future release";
warning() << deprecationWarning;
result.append("note", deprecationWarning);
}
return appendCommandStatus(result, createCollection(txn, dbname, cmdObj));
}
} cmdCreate;
class CmdFileMD5 : public Command {
public:
CmdFileMD5() : Command("filemd5") {}
virtual bool slaveOk() const {
return true;
}
virtual void help(stringstream& help) const {
help << " example: { filemd5 : ObjectId(aaaaaaa) , root : \"fs\" }";
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual std::string parseNs(const std::string& dbname, const BSONObj& cmdObj) const {
std::string collectionName = cmdObj.getStringField("root");
if (collectionName.empty())
collectionName = "fs";
collectionName += ".chunks";
return NamespaceString(dbname, collectionName).ns();
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), ActionType::find));
}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& jsobj,
int,
string& errmsg,
BSONObjBuilder& result) {
const std::string ns = parseNs(dbname, jsobj);
md5digest d;
md5_state_t st;
md5_init(&st);
int n = 0;
bool partialOk = jsobj["partialOk"].trueValue();
if (partialOk) {
// WARNING: This code depends on the binary layout of md5_state. It will not be
// compatible with different md5 libraries or work correctly in an environment with
// mongod's of different endians. It is ok for mongos to be a different endian since
// it just passes the buffer through to another mongod.
BSONElement stateElem = jsobj["md5state"];
if (!stateElem.eoo()) {
int len;
const char* data = stateElem.binDataClean(len);
massert(16247, "md5 state not correct size", len == sizeof(st));
memcpy(&st, data, sizeof(st));
}
n = jsobj["startAt"].numberInt();
}
BSONObj query = BSON("files_id" << jsobj["filemd5"] << "n" << GTE << n);
BSONObj sort = BSON("files_id" << 1 << "n" << 1);
MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
auto qr = stdx::make_unique<QueryRequest>(NamespaceString(ns));
qr->setFilter(query);
qr->setSort(sort);
auto statusWithCQ = CanonicalQuery::canonicalize(
txn, std::move(qr), ExtensionsCallbackDisallowExtensions());
if (!statusWithCQ.isOK()) {
uasserted(17240, "Can't canonicalize query " + query.toString());
return 0;
}
unique_ptr<CanonicalQuery> cq = std::move(statusWithCQ.getValue());
// Check shard version at startup.
// This will throw before we've done any work if shard version is outdated
// We drop and re-acquire these locks every document because md5'ing is expensive
unique_ptr<AutoGetCollectionForRead> ctx(new AutoGetCollectionForRead(txn, ns));
Collection* coll = ctx->getCollection();
auto statusWithPlanExecutor = getExecutor(txn,
coll,
std::move(cq),
PlanExecutor::YIELD_MANUAL,
QueryPlannerParams::NO_TABLE_SCAN);
if (!statusWithPlanExecutor.isOK()) {
uasserted(17241, "Can't get executor for query " + query.toString());
return 0;
}
unique_ptr<PlanExecutor> exec = std::move(statusWithPlanExecutor.getValue());
// Process notifications when the lock is released/reacquired in the loop below
exec->registerExec(coll);
BSONObj obj;
PlanExecutor::ExecState state;
while (PlanExecutor::ADVANCED == (state = exec->getNext(&obj, NULL))) {
BSONElement ne = obj["n"];
verify(ne.isNumber());
int myn = ne.numberInt();
if (n != myn) {
if (partialOk) {
break; // skipped chunk is probably on another shard
}
log() << "should have chunk: " << n << " have:" << myn << endl;
dumpChunks(txn, ns, query, sort);
uassert(10040, "chunks out of order", n == myn);
}
// make a copy of obj since we access data in it while yielding locks
BSONObj owned = obj.getOwned();
exec->saveState();
// UNLOCKED
ctx.reset();
int len;
const char* data = owned["data"].binDataClean(len);
// This is potentially an expensive operation, so do it out of the lock
md5_append(&st, (const md5_byte_t*)(data), len);
n++;
try {
// RELOCKED
ctx.reset(new AutoGetCollectionForRead(txn, ns));
} catch (const SendStaleConfigException& ex) {
LOG(1) << "chunk metadata changed during filemd5, will retarget and continue";
break;
}
// Have the lock again. See if we were killed.
if (!exec->restoreState()) {
if (!partialOk) {
uasserted(13281, "File deleted during filemd5 command");
}
}
}
if (PlanExecutor::DEAD == state || PlanExecutor::FAILURE == state) {
return appendCommandStatus(result,
Status(ErrorCodes::OperationFailed,
str::stream()
<< "Executor error during filemd5 command: "
<< WorkingSetCommon::toStatusString(obj)));
}
if (partialOk)
result.appendBinData("md5state", sizeof(st), BinDataGeneral, &st);
// This must be *after* the capture of md5state since it mutates st
md5_finish(&st, d);
result.append("numChunks", n);
result.append("md5", digestToString(d));
}
MONGO_WRITE_CONFLICT_RETRY_LOOP_END(txn, "filemd5", dbname);
return true;
}
void dumpChunks(OperationContext* txn,
const string& ns,
const BSONObj& query,
const BSONObj& sort) {
DBDirectClient client(txn);
Query q(query);
q.sort(sort);
unique_ptr<DBClientCursor> c = client.query(ns, q);
while (c->more())
PRINT(c->nextSafe());
}
} cmdFileMD5;
class CmdDatasize : public Command {
virtual string parseNs(const string& dbname, const BSONObj& cmdObj) const {
return parseNsFullyQualified(dbname, cmdObj);
}
public:
CmdDatasize() : Command("dataSize", false, "datasize") {}
virtual bool slaveOk() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual void help(stringstream& help) const {
help << "determine data size for a set of data in a certain range"
"\nexample: { dataSize:\"blog.posts\", keyPattern:{x:1}, min:{x:10}, max:{x:55} }"
"\nmin and max parameters are optional. They must either both be included or both "
"omitted"
"\nkeyPattern is an optional parameter indicating an index pattern that would be "
"useful"
"for iterating over the min/max bounds. If keyPattern is omitted, it is inferred "
"from "
"the structure of min. "
"\nnote: This command may take a while to run";
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::find);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& jsobj,
int,
string& errmsg,
BSONObjBuilder& result) {
Timer timer;
string ns = jsobj.firstElement().String();
BSONObj min = jsobj.getObjectField("min");
BSONObj max = jsobj.getObjectField("max");
BSONObj keyPattern = jsobj.getObjectField("keyPattern");
bool estimate = jsobj["estimate"].trueValue();
AutoGetCollectionForRead ctx(txn, ns);
Collection* collection = ctx.getCollection();
long long numRecords = 0;
if (collection) {
numRecords = collection->numRecords(txn);
}
if (numRecords == 0) {
result.appendNumber("size", 0);
result.appendNumber("numObjects", 0);
result.append("millis", timer.millis());
return true;
}
result.appendBool("estimate", estimate);
unique_ptr<PlanExecutor> exec;
if (min.isEmpty() && max.isEmpty()) {
if (estimate) {
result.appendNumber("size", static_cast<long long>(collection->dataSize(txn)));
result.appendNumber("numObjects", numRecords);
result.append("millis", timer.millis());
return 1;
}
exec = InternalPlanner::collectionScan(txn, ns, collection, PlanExecutor::YIELD_MANUAL);
} else if (min.isEmpty() || max.isEmpty()) {
errmsg = "only one of min or max specified";
return false;
} else {
if (keyPattern.isEmpty()) {
// if keyPattern not provided, try to infer it from the fields in 'min'
keyPattern = Helpers::inferKeyPattern(min);
}
IndexDescriptor* idx =
collection->getIndexCatalog()->findShardKeyPrefixedIndex(txn,
keyPattern,
true); // requireSingleKey
if (idx == NULL) {
errmsg = "couldn't find valid index containing key pattern";
return false;
}
// If both min and max non-empty, append MinKey's to make them fit chosen index
KeyPattern kp(idx->keyPattern());
min = Helpers::toKeyFormat(kp.extendRangeBound(min, false));
max = Helpers::toKeyFormat(kp.extendRangeBound(max, false));
exec = InternalPlanner::indexScan(txn,
collection,
idx,
min,
max,
false, // endKeyInclusive
PlanExecutor::YIELD_MANUAL);
}
long long avgObjSize = collection->dataSize(txn) / numRecords;
long long maxSize = jsobj["maxSize"].numberLong();
long long maxObjects = jsobj["maxObjects"].numberLong();
long long size = 0;
long long numObjects = 0;
RecordId loc;
BSONObj obj;
PlanExecutor::ExecState state;
while (PlanExecutor::ADVANCED == (state = exec->getNext(&obj, &loc))) {
if (estimate)
size += avgObjSize;
else
size += collection->getRecordStore()->dataFor(txn, loc).size();
numObjects++;
if ((maxSize && size > maxSize) || (maxObjects && numObjects > maxObjects)) {
result.appendBool("maxReached", true);
break;
}
}
if (PlanExecutor::FAILURE == state || PlanExecutor::DEAD == state) {
warning() << "Internal error while reading " << ns << endl;
return appendCommandStatus(
result,
Status(ErrorCodes::OperationFailed,
str::stream() << "Executor error while reading during dataSize command: "
<< WorkingSetCommon::toStatusString(obj)));
}
ostringstream os;
os << "Finding size for ns: " << ns;
if (!min.isEmpty()) {
os << " between " << min << " and " << max;
}
result.appendNumber("size", size);
result.appendNumber("numObjects", numObjects);
result.append("millis", timer.millis());
return true;
}
} cmdDatasize;
class CollectionStats : public Command {
public:
CollectionStats() : Command("collStats", false, "collstats") {}
virtual bool slaveOk() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual void help(stringstream& help) const {
help
<< "{ collStats:\"blog.posts\" , scale : 1 } scale divides sizes e.g. for KB use 1024\n"
" avgObjSize - in bytes";
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::collStats);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& jsobj,
int,
string& errmsg,
BSONObjBuilder& result) {
const NamespaceString nss(parseNs(dbname, jsobj));
if (nss.coll().empty()) {
errmsg = "No collection name specified";
return false;
}
result.append("ns", nss.ns());
Status status = appendCollectionStorageStats(txn, nss, jsobj, &result);
if (!status.isOK()) {
errmsg = status.reason();
return false;
}
return true;
}
} cmdCollectionStats;
class CollectionModCommand : public Command {
public:
CollectionModCommand() : Command("collMod") {}
virtual bool slaveOk() const {
return false;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
virtual void help(stringstream& help) const {
help << "Sets collection options.\n"
"Example: { collMod: 'foo', usePowerOf2Sizes:true }\n"
"Example: { collMod: 'foo', index: {keyPattern: {a: 1}, expireAfterSeconds: 600} "
"Example: { collMod: 'foo', index: {name: 'bar', expireAfterSeconds: 600} }\n";
}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) {
AuthorizationSession* authzSession = AuthorizationSession::get(client);
if (!authzSession->isAuthorizedForActionsOnResource(parseResourcePattern(dbname, cmdObj),
ActionType::collMod)) {
return Status(ErrorCodes::Unauthorized, "unauthorized");
}
// Check for additional required privileges if attempting to modify a view.
if (cmdObj["viewOn"] || cmdObj["pipeline"]) {
return canCreateOrModifyView(
client, dbname, cmdObj, parseResourcePattern(dbname, cmdObj));
}
return Status::OK();
}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& jsobj,
int,
string& errmsg,
BSONObjBuilder& result) {
const NamespaceString nss = parseNsCollectionRequired(dbname, jsobj);
return appendCommandStatus(result, collMod(txn, nss, jsobj, &result));
}
} collectionModCommand;
class DBStats : public Command {
public:
DBStats() : Command("dbStats", false, "dbstats") {}
virtual bool slaveOk() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual void help(stringstream& help) const {
help << "Get stats on a database. Not instantaneous. Slower for databases with large "
".ns files.\n"
"Example: { dbStats:1, scale:1 }";
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::dbStats);
out->push_back(Privilege(ResourcePattern::forDatabaseName(dbname), actions));
}
bool run(OperationContext* txn,
const string& dbname,
BSONObj& jsobj,
int,
string& errmsg,
BSONObjBuilder& result) {
int scale = 1;
if (jsobj["scale"].isNumber()) {
scale = jsobj["scale"].numberInt();
if (scale <= 0) {
errmsg = "scale has to be > 0";
return false;
}
} else if (jsobj["scale"].trueValue()) {
errmsg = "scale has to be a number > 0";
return false;
}
const string ns = parseNs(dbname, jsobj);
// TODO (Kal): OldClientContext legacy, needs to be removed
{
CurOp::get(txn)->ensureStarted();
stdx::lock_guard<Client> lk(*txn->getClient());
CurOp::get(txn)->setNS_inlock(dbname);
}
// We lock the entire database in S-mode in order to ensure that the contents will not
// change for the stats snapshot. This might be unnecessary and if it becomes a
// performance issue, we can take IS lock and then lock collection-by-collection.
ScopedTransaction scopedXact(txn, MODE_IS);
AutoGetDb autoDb(txn, ns, MODE_S);
result.append("db", ns);
Database* db = autoDb.getDb();
if (!db) {
// TODO: This preserves old behaviour where we used to create an empty database
// metadata even when the database is accessed for read. Without this several
// unit-tests will fail, which are fairly easy to fix. If backwards compatibility
// is not needed for the missing DB case, we can just do the same that's done in
// CollectionStats.
result.appendNumber("collections", 0);
result.appendNumber("objects", 0);
result.append("avgObjSize", 0);
result.appendNumber("dataSize", 0);
result.appendNumber("storageSize", 0);
result.appendNumber("numExtents", 0);
result.appendNumber("indexes", 0);
result.appendNumber("indexSize", 0);
result.appendNumber("fileSize", 0);
} else {
{
stdx::lock_guard<Client> lk(*txn->getClient());
// TODO: OldClientContext legacy, needs to be removed
CurOp::get(txn)->enter_inlock(dbname.c_str(), db->getProfilingLevel());
}
db->getStats(txn, &result, scale);
}
return true;
}
} cmdDBStats;
/* Returns client's uri */
class CmdWhatsMyUri : public Command {
public:
CmdWhatsMyUri() : Command("whatsmyuri") {}
virtual bool slaveOk() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual void help(stringstream& help) const {
help << "{whatsmyuri:1}";
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {} // No auth required
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
result << "you" << txn->getClient()->clientAddress(true /*includePort*/);
return true;
}
} cmdWhatsMyUri;
class AvailableQueryOptions : public Command {
public:
AvailableQueryOptions() : Command("availableQueryOptions", false, "availablequeryoptions") {}
virtual bool slaveOk() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) {
return Status::OK();
}
virtual bool run(OperationContext* txn,
const string& dbname,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result) {
result << "options" << QueryOption_AllSupported;
return true;
}
} availableQueryOptionsCmd;
/**
* Guard object for making a good-faith effort to enter maintenance mode and leave it when it
* goes out of scope.
*
* Sometimes we cannot set maintenance mode, in which case the call to setMaintenanceMode will
* return a non-OK status. This class does not treat that case as an error which means that
* anybody using it is assuming it is ok to continue execution without maintenance mode.
*
* TODO: This assumption needs to be audited and documented, or this behavior should be moved
* elsewhere.
*/
class MaintenanceModeSetter {
public:
MaintenanceModeSetter()
: maintenanceModeSet(
repl::getGlobalReplicationCoordinator()->setMaintenanceMode(true).isOK()) {}
~MaintenanceModeSetter() {
if (maintenanceModeSet)
repl::getGlobalReplicationCoordinator()->setMaintenanceMode(false);
}
private:
bool maintenanceModeSet;
};
namespace {
// Symbolic names for indexes to make code more readable.
const std::size_t kCmdOptionMaxTimeMSField = 0;
const std::size_t kHelpField = 1;
const std::size_t kShardVersionFieldIdx = 2;
const std::size_t kQueryOptionMaxTimeMSField = 3;
// We make an array of the fields we need so we can call getFields once. This saves repeated
// scans over the command object.
const std::array<StringData, 4> neededFieldNames{QueryRequest::cmdOptionMaxTimeMS,
Command::kHelpFieldName,
ChunkVersion::kShardVersionField,
QueryRequest::queryOptionMaxTimeMS};
} // namespace
void appendOpTimeMetadata(OperationContext* txn,
const rpc::RequestInterface& request,
BSONObjBuilder* metadataBob) {
const bool isShardingAware = ShardingState::get(txn)->enabled();
const bool isConfig = serverGlobalParams.clusterRole == ClusterRole::ConfigServer;
repl::ReplicationCoordinator* replCoord = repl::getGlobalReplicationCoordinator();
const bool isReplSet =
replCoord->getReplicationMode() == repl::ReplicationCoordinator::modeReplSet;
if (isReplSet) {
// Attach our own last opTime.
repl::OpTime lastOpTimeFromClient =
repl::ReplClientInfo::forClient(txn->getClient()).getLastOp();
if (request.getMetadata().hasField(rpc::kReplSetMetadataFieldName)) {
replCoord->prepareReplMetadata(lastOpTimeFromClient, metadataBob);
}
// For commands from mongos, append some info to help getLastError(w) work.
// TODO: refactor out of here as part of SERVER-18236
if (isShardingAware || isConfig) {
rpc::ShardingMetadata(lastOpTimeFromClient, replCoord->getElectionId())
.writeToMetadata(metadataBob);
}
}
// If we're a shard other than the config shard, attach the last configOpTime we know about.
if (isShardingAware && !isConfig) {
auto opTime = grid.configOpTime();
rpc::ConfigServerMetadata(opTime).writeToMetadata(metadataBob);
}
}
/**
* this handles
- auth
- maintenance mode
- opcounters
- locking
- context
then calls run()
*/
void Command::execCommand(OperationContext* txn,
Command* command,
const rpc::RequestInterface& request,
rpc::ReplyBuilderInterface* replyBuilder) {
try {
{
stdx::lock_guard<Client> lk(*txn->getClient());
CurOp::get(txn)->setCommand_inlock(command);
}
// TODO: move this back to runCommands when mongos supports OperationContext
// see SERVER-18515 for details.
uassertStatusOK(rpc::readRequestMetadata(txn, request.getMetadata()));
dassert(replyBuilder->getState() == rpc::ReplyBuilderInterface::State::kCommandReply);
std::string dbname = request.getDatabase().toString();
unique_ptr<MaintenanceModeSetter> mmSetter;
std::array<BSONElement, std::tuple_size<decltype(neededFieldNames)>::value>
extractedFields{};
request.getCommandArgs().getFields(neededFieldNames, &extractedFields);
if (isHelpRequest(extractedFields[kHelpField])) {
CurOp::get(txn)->ensureStarted();
// We disable last-error for help requests due to SERVER-11492, because config servers
// use help requests to determine which commands are database writes, and so must be
// forwarded to all config servers.
LastError::get(txn->getClient()).disable();
generateHelpResponse(txn, request, replyBuilder, *command);
return;
}
ImpersonationSessionGuard guard(txn);
uassertStatusOK(
_checkAuthorization(command, txn->getClient(), dbname, request.getCommandArgs()));
repl::ReplicationCoordinator* replCoord =
repl::ReplicationCoordinator::get(txn->getClient()->getServiceContext());
const bool iAmPrimary = replCoord->canAcceptWritesForDatabase(dbname);
{
bool commandCanRunOnSecondary = command->slaveOk();
bool commandIsOverriddenToRunOnSecondary = command->slaveOverrideOk() &&
rpc::ServerSelectionMetadata::get(txn).canRunOnSecondary();
bool iAmStandalone = !txn->writesAreReplicated();
bool canRunHere = iAmPrimary || commandCanRunOnSecondary ||
commandIsOverriddenToRunOnSecondary || iAmStandalone;
// This logic is clearer if we don't have to invert it.
if (!canRunHere && command->slaveOverrideOk()) {
uasserted(ErrorCodes::NotMasterNoSlaveOk, "not master and slaveOk=false");
}
uassert(ErrorCodes::NotMaster, "not master", canRunHere);
if (!command->maintenanceOk() &&
replCoord->getReplicationMode() == repl::ReplicationCoordinator::modeReplSet &&
!replCoord->canAcceptWritesForDatabase(dbname) &&
!replCoord->getMemberState().secondary()) {
uassert(ErrorCodes::NotMasterOrSecondary,
"node is recovering",
!replCoord->getMemberState().recovering());
uassert(ErrorCodes::NotMasterOrSecondary,
"node is not in primary or recovering state",
replCoord->getMemberState().primary());
// Check ticket SERVER-21432, slaveOk commands are allowed in drain mode
uassert(ErrorCodes::NotMasterOrSecondary,
"node is in drain mode",
commandIsOverriddenToRunOnSecondary || commandCanRunOnSecondary);
}
}
if (command->adminOnly()) {
LOG(2) << "command: " << request.getCommandName();
}
if (command->maintenanceMode()) {
mmSetter.reset(new MaintenanceModeSetter);
}
if (command->shouldAffectCommandCounter()) {
OpCounters* opCounters = &globalOpCounters;
opCounters->gotCommand();
}
// Handle command option maxTimeMS.
int maxTimeMS = uassertStatusOK(
QueryRequest::parseMaxTimeMS(extractedFields[kCmdOptionMaxTimeMSField]));
uassert(ErrorCodes::InvalidOptions,
"no such command option $maxTimeMs; use maxTimeMS instead",
extractedFields[kQueryOptionMaxTimeMSField].eoo());
if (maxTimeMS > 0) {
uassert(40119,
"Illegal attempt to set operation deadline within DBDirectClient",
!txn->getClient()->isInDirectClient());
txn->setDeadlineAfterNowBy(Milliseconds{maxTimeMS});
}
// Operations are only versioned against the primary. We also make sure not to redo shard
// version handling if this command was issued via the direct client.
if (iAmPrimary && !txn->getClient()->isInDirectClient()) {
// Handle shard version and config optime information that may have been sent along with
// the command.
auto& oss = OperationShardingState::get(txn);
auto commandNS = NamespaceString(command->parseNs(dbname, request.getCommandArgs()));
oss.initializeShardVersion(commandNS, extractedFields[kShardVersionFieldIdx]);
auto shardingState = ShardingState::get(txn);
if (oss.hasShardVersion()) {
if (serverGlobalParams.clusterRole != ClusterRole::ShardServer) {
uassertStatusOK(
{ErrorCodes::IllegalOperation,
"Cannot accept sharding commands if not started with --shardsvr"});
} else if (!shardingState->enabled()) {
// TODO(esha): Once 3.4 ships, we no longer need to support initializing
// sharding awareness through commands, so just reject all sharding commands.
if (!shardingState->commandInitializesShardingAwareness(
request.getCommandName().toString())) {
uassertStatusOK({ErrorCodes::IllegalOperation,
str::stream()
<< "Received a command with sharding chunk version "
"information but this node is not sharding aware: "
<< request.getCommandArgs().jsonString()});
}
}
}
if (shardingState->enabled()) {
// TODO(spencer): Do this unconditionally once all nodes are sharding aware
// by default.
uassertStatusOK(shardingState->updateConfigServerOpTimeFromMetadata(txn));
}
}
// Can throw
txn->checkForInterrupt(); // May trigger maxTimeAlwaysTimeOut fail point.
bool retval = false;
CurOp::get(txn)->ensureStarted();
command->_commandsExecuted.increment();
retval = command->run(txn, request, replyBuilder);
dassert(replyBuilder->getState() == rpc::ReplyBuilderInterface::State::kOutputDocs);
if (!retval) {
command->_commandsFailed.increment();
}
} catch (const DBException& e) {
// If we got a stale config, wait in case the operation is stuck in a critical section
if (e.getCode() == ErrorCodes::SendStaleConfig) {
auto& sce = static_cast<const StaleConfigException&>(e);
ShardingState::get(txn)->onStaleShardVersion(
txn, NamespaceString(sce.getns()), sce.getVersionReceived());
}
BSONObjBuilder metadataBob;
appendOpTimeMetadata(txn, request, &metadataBob);
Command::generateErrorResponse(txn, replyBuilder, e, request, command, metadataBob.done());
}
}
// This really belongs in commands.cpp, but we need to move it here so we can
// use shardingState and the repl coordinator without changing our entire library
// structure.
// It will be moved back as part of SERVER-18236.
bool Command::run(OperationContext* txn,
const rpc::RequestInterface& request,
rpc::ReplyBuilderInterface* replyBuilder) {
auto bytesToReserve = reserveBytesForReply();
// SERVER-22100: In Windows DEBUG builds, the CRT heap debugging overhead, in conjunction with the
// additional memory pressure introduced by reply buffer pre-allocation, causes the concurrency
// suite to run extremely slowly. As a workaround we do not pre-allocate in Windows DEBUG builds.
#ifdef _WIN32
if (kDebugBuild)
bytesToReserve = 0;
#endif
// run expects non-const bsonobj
BSONObj cmd = request.getCommandArgs();
// run expects const db std::string (can't bind to temporary)
const std::string db = request.getDatabase().toString();
BSONObjBuilder inPlaceReplyBob(replyBuilder->getInPlaceReplyBuilder(bytesToReserve));
auto readConcernArgsStatus = extractReadConcern(txn, cmd, supportsReadConcern());
if (!readConcernArgsStatus.isOK()) {
auto result = appendCommandStatus(inPlaceReplyBob, readConcernArgsStatus.getStatus());
inPlaceReplyBob.doneFast();
replyBuilder->setMetadata(rpc::makeEmptyMetadata());
return result;
}
Status rcStatus = waitForReadConcern(txn, readConcernArgsStatus.getValue());
if (!rcStatus.isOK()) {
if (rcStatus == ErrorCodes::ExceededTimeLimit) {
const int debugLevel =
serverGlobalParams.clusterRole == ClusterRole::ConfigServer ? 0 : 2;
LOG(debugLevel) << "Command on database " << db
<< " timed out waiting for read concern to be satisfied. Command: "
<< getRedactedCopyForLogging(request.getCommandArgs());
}
auto result = appendCommandStatus(inPlaceReplyBob, rcStatus);
inPlaceReplyBob.doneFast();
replyBuilder->setMetadata(rpc::makeEmptyMetadata());
return result;
}
auto wcResult = extractWriteConcern(txn, cmd, db, supportsWriteConcern(cmd));
if (!wcResult.isOK()) {
auto result = appendCommandStatus(inPlaceReplyBob, wcResult.getStatus());
inPlaceReplyBob.doneFast();
replyBuilder->setMetadata(rpc::makeEmptyMetadata());
return result;
}
std::string errmsg;
bool result;
if (!supportsWriteConcern(cmd)) {
// TODO: remove queryOptions parameter from command's run method.
result = run(txn, db, cmd, 0, errmsg, inPlaceReplyBob);
} else {
// Change the write concern while running the command.
const auto oldWC = txn->getWriteConcern();
ON_BLOCK_EXIT([&] { txn->setWriteConcern(oldWC); });
txn->setWriteConcern(wcResult.getValue());
result = run(txn, db, cmd, 0, errmsg, inPlaceReplyBob);
// Nothing in run() should change the writeConcern.
dassert(txn->getWriteConcern().toBSON() == wcResult.getValue().toBSON());
WriteConcernResult res;
auto waitForWCStatus =
waitForWriteConcern(txn,
repl::ReplClientInfo::forClient(txn->getClient()).getLastOp(),
wcResult.getValue(),
&res);
appendCommandWCStatus(inPlaceReplyBob, waitForWCStatus, res);
// SERVER-22421: This code is to ensure error response backwards compatibility with the
// user management commands. This can be removed in 3.6.
if (!waitForWCStatus.isOK() && isUserManagementCommand(getName())) {
BSONObj temp = inPlaceReplyBob.asTempObj().copy();
inPlaceReplyBob.resetToEmpty();
appendCommandStatus(inPlaceReplyBob, waitForWCStatus);
inPlaceReplyBob.appendElementsUnique(temp);
}
}
// When a linearizable read command is passed in, check to make sure we're reading
// from the primary.
if (supportsReadConcern() && (readConcernArgsStatus.getValue().getLevel() ==
repl::ReadConcernLevel::kLinearizableReadConcern) &&
(request.getCommandName() != "getMore")) {
auto linearizableReadStatus = waitForLinearizableReadConcern(txn);
if (!linearizableReadStatus.isOK()) {
inPlaceReplyBob.resetToEmpty();
auto result = appendCommandStatus(inPlaceReplyBob, linearizableReadStatus);
inPlaceReplyBob.doneFast();
replyBuilder->setMetadata(rpc::makeEmptyMetadata());
return result;
}
}
appendCommandStatus(inPlaceReplyBob, result, errmsg);
inPlaceReplyBob.doneFast();
BSONObjBuilder metadataBob;
appendOpTimeMetadata(txn, request, &metadataBob);
replyBuilder->setMetadata(metadataBob.done());
return result;
}
void Command::registerError(OperationContext* txn, const DBException& exception) {
CurOp::get(txn)->debug().exceptionInfo = exception.getInfo();
}
} // namespace mongo
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