/
commands_public.cpp
1703 lines (1427 loc) · 66.6 KB
/
commands_public.cpp
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/**
* Copyright (C) 2008-2015 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 "mongo/bson/bsonobj_comparator.h"
#include "mongo/bson/simple_bsonobj_comparator.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/client/connpool.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_manager_global.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/auth/privilege.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/copydb.h"
#include "mongo/db/commands/rename_collection.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/matcher/extensions_callback_noop.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/query/collation/collator_factory_interface.h"
#include "mongo/db/query/parsed_distinct.h"
#include "mongo/db/query/view_response_formatter.h"
#include "mongo/db/views/resolved_view.h"
#include "mongo/executor/task_executor_pool.h"
#include "mongo/rpc/get_status_from_command_result.h"
#include "mongo/s/async_requests_sender.h"
#include "mongo/s/catalog_cache.h"
#include "mongo/s/client/shard_connection.h"
#include "mongo/s/client/shard_registry.h"
#include "mongo/s/commands/cluster_aggregate.h"
#include "mongo/s/commands/cluster_commands_helpers.h"
#include "mongo/s/commands/cluster_explain.h"
#include "mongo/s/grid.h"
#include "mongo/s/query/store_possible_cursor.h"
#include "mongo/s/stale_exception.h"
#include "mongo/scripting/engine.h"
#include "mongo/util/log.h"
#include "mongo/util/timer.h"
namespace mongo {
using std::unique_ptr;
using std::shared_ptr;
using std::list;
using std::make_pair;
using std::map;
using std::multimap;
using std::set;
using std::string;
using std::stringstream;
using std::vector;
namespace {
bool cursorCommandPassthrough(OperationContext* opCtx,
StringData dbName,
const ShardId& shardId,
const BSONObj& cmdObj,
const NamespaceString& nss,
BSONObjBuilder* out) {
const auto shardStatus = Grid::get(opCtx)->shardRegistry()->getShard(opCtx, shardId);
if (!shardStatus.isOK()) {
return CommandHelpers::appendCommandStatus(*out, shardStatus.getStatus());
}
const auto shard = shardStatus.getValue();
ScopedDbConnection conn(shard->getConnString());
auto cursor = conn->query(str::stream() << dbName << ".$cmd",
CommandHelpers::filterCommandRequestForPassthrough(cmdObj),
/* nToReturn=*/-1);
if (!cursor || !cursor->more()) {
return CommandHelpers::appendCommandStatus(
*out, {ErrorCodes::OperationFailed, "failed to read command response from shard"});
}
BSONObj response = cursor->nextSafe().getOwned();
conn.done();
Status status = getStatusFromCommandResult(response);
if (ErrorCodes::StaleConfig == status) {
uassertStatusOK(status.withContext("command failed because of stale config"));
}
if (!status.isOK()) {
return CommandHelpers::appendCommandStatus(*out, status);
}
StatusWith<BSONObj> transformedResponse =
storePossibleCursor(opCtx,
shardId,
HostAndPort(cursor->originalHost()),
response,
nss,
Grid::get(opCtx)->getExecutorPool()->getArbitraryExecutor(),
Grid::get(opCtx)->getCursorManager());
if (!transformedResponse.isOK()) {
return CommandHelpers::appendCommandStatus(*out, transformedResponse.getStatus());
}
CommandHelpers::filterCommandReplyForPassthrough(transformedResponse.getValue(), out);
return true;
}
BSONObj getQuery(const BSONObj& cmdObj) {
if (cmdObj["query"].type() == Object)
return cmdObj["query"].embeddedObject();
if (cmdObj["q"].type() == Object)
return cmdObj["q"].embeddedObject();
return BSONObj();
}
StatusWith<BSONObj> getCollation(const BSONObj& cmdObj) {
BSONElement collationElement;
auto status = bsonExtractTypedField(cmdObj, "collation", BSONType::Object, &collationElement);
if (status.isOK()) {
return collationElement.Obj();
}
if (status != ErrorCodes::NoSuchKey) {
return status;
}
return BSONObj();
}
class PublicGridCommand : public BasicCommand {
protected:
PublicGridCommand(const char* n, const char* oldname = NULL) : BasicCommand(n, oldname) {}
AllowedOnSecondary secondaryAllowed() const override {
return AllowedOnSecondary::kAlways;
}
virtual bool adminOnly() const {
return false;
}
bool adminPassthrough(OperationContext* opCtx,
const ShardId& shardId,
const BSONObj& cmdObj,
BSONObjBuilder& result) {
return passthrough(opCtx, "admin", shardId, cmdObj, result);
}
bool passthrough(OperationContext* opCtx,
const std::string& db,
const ShardId& shardId,
const BSONObj& cmdObj,
BSONObjBuilder& result) {
const auto shard =
uassertStatusOK(Grid::get(opCtx)->shardRegistry()->getShard(opCtx, shardId));
ShardConnection conn(shard->getConnString(), "");
BSONObj res;
bool ok =
conn->runCommand(db, CommandHelpers::filterCommandRequestForPassthrough(cmdObj), res);
conn.done();
// First append the properly constructed writeConcernError. It will then be skipped
// in appendElementsUnique.
if (auto wcErrorElem = res["writeConcernError"]) {
appendWriteConcernErrorToCmdResponse(shard->getId(), wcErrorElem, result);
}
result.appendElementsUnique(CommandHelpers::filterCommandReplyForPassthrough(res));
return ok;
}
};
class NotAllowedOnShardedCollectionCmd : public PublicGridCommand {
protected:
NotAllowedOnShardedCollectionCmd(const char* n) : PublicGridCommand(n) {}
bool run(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
const NamespaceString nss(parseNs(dbName, cmdObj));
const auto routingInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getCollectionRoutingInfo(opCtx, nss));
uassert(ErrorCodes::IllegalOperation,
str::stream() << "can't do command: " << getName() << " on sharded collection",
!routingInfo.cm());
const auto primaryShardId = routingInfo.primaryId();
const auto primaryShard =
uassertStatusOK(Grid::get(opCtx)->shardRegistry()->getShard(opCtx, primaryShardId));
// Here, we first filter the command before appending an UNSHARDED shardVersion, because
// "shardVersion" is one of the fields that gets filtered out.
BSONObj filteredCmdObj(CommandHelpers::filterCommandRequestForPassthrough(cmdObj));
BSONObj filteredCmdObjWithVersion(
appendShardVersion(filteredCmdObj, ChunkVersion::UNSHARDED()));
auto commandResponse = uassertStatusOK(primaryShard->runCommandWithFixedRetryAttempts(
opCtx,
ReadPreferenceSetting::get(opCtx),
dbName,
primaryShard->isConfig() ? filteredCmdObj : filteredCmdObjWithVersion,
Shard::RetryPolicy::kIdempotent));
uassert(ErrorCodes::IllegalOperation,
str::stream() << "can't do command: " << getName() << " on a sharded collection",
!ErrorCodes::isStaleShardingError(commandResponse.commandStatus.code()));
uassertStatusOK(commandResponse.commandStatus);
if (!commandResponse.writeConcernStatus.isOK()) {
appendWriteConcernErrorToCmdResponse(
primaryShardId, commandResponse.response["writeConcernError"], result);
}
result.appendElementsUnique(
CommandHelpers::filterCommandReplyForPassthrough(std::move(commandResponse.response)));
return true;
}
};
// MongoS commands implementation
class DropIndexesCmd : public ErrmsgCommandDeprecated {
public:
DropIndexesCmd() : ErrmsgCommandDeprecated("dropIndexes", "deleteIndexes") {}
AllowedOnSecondary secondaryAllowed() const override {
return AllowedOnSecondary::kNever;
}
bool adminOnly() const override {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::dropIndex);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
bool errmsgRun(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
std::string& errmsg,
BSONObjBuilder& output) override {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbName, cmdObj));
LOG(1) << "dropIndexes: " << nss << " cmd:" << redact(cmdObj);
auto shardResponses = scatterGatherOnlyVersionIfUnsharded(
opCtx,
dbName,
nss,
CommandHelpers::filterCommandRequestForPassthrough(cmdObj),
ReadPreferenceSetting::get(opCtx),
Shard::RetryPolicy::kNotIdempotent);
return appendRawResponses(
opCtx, &errmsg, &output, std::move(shardResponses), {ErrorCodes::NamespaceNotFound});
}
} dropIndexesCmd;
class CreateIndexesCmd : public ErrmsgCommandDeprecated {
public:
CreateIndexesCmd() : ErrmsgCommandDeprecated("createIndexes") {}
AllowedOnSecondary secondaryAllowed() const override {
return AllowedOnSecondary::kNever;
}
bool adminOnly() const override {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::createIndex);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
bool errmsgRun(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
std::string& errmsg,
BSONObjBuilder& output) override {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbName, cmdObj));
LOG(1) << "createIndexes: " << nss << " cmd:" << redact(cmdObj);
uassertStatusOK(createShardDatabase(opCtx, dbName));
auto shardResponses = scatterGatherOnlyVersionIfUnsharded(
opCtx,
dbName,
nss,
CommandHelpers::filterCommandRequestForPassthrough(cmdObj),
ReadPreferenceSetting::get(opCtx),
Shard::RetryPolicy::kNoRetry);
return appendRawResponses(opCtx,
&errmsg,
&output,
std::move(shardResponses),
{ErrorCodes::CannotImplicitlyCreateCollection});
}
} createIndexesCmd;
class ReIndexCmd : public ErrmsgCommandDeprecated {
public:
ReIndexCmd() : ErrmsgCommandDeprecated("reIndex") {}
AllowedOnSecondary secondaryAllowed() const override {
return AllowedOnSecondary::kNever;
}
bool adminOnly() const override {
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::reIndex);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
bool errmsgRun(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
std::string& errmsg,
BSONObjBuilder& output) override {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbName, cmdObj));
LOG(1) << "reIndex: " << nss << " cmd:" << redact(cmdObj);
auto shardResponses = scatterGatherOnlyVersionIfUnsharded(
opCtx,
dbName,
nss,
CommandHelpers::filterCommandRequestForPassthrough(cmdObj),
ReadPreferenceSetting::get(opCtx),
Shard::RetryPolicy::kNoRetry);
return appendRawResponses(
opCtx, &errmsg, &output, std::move(shardResponses), {ErrorCodes::NamespaceNotFound});
}
} reIndexCmd;
class CollectionModCmd : public ErrmsgCommandDeprecated {
public:
CollectionModCmd() : ErrmsgCommandDeprecated("collMod") {}
AllowedOnSecondary secondaryAllowed() const override {
return AllowedOnSecondary::kNever;
}
bool adminOnly() const override {
return false;
}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbname, cmdObj));
return AuthorizationSession::get(client)->checkAuthForCollMod(nss, cmdObj, true);
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
bool errmsgRun(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
std::string& errmsg,
BSONObjBuilder& output) override {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbName, cmdObj));
LOG(1) << "collMod: " << nss << " cmd:" << redact(cmdObj);
auto shardResponses = scatterGatherOnlyVersionIfUnsharded(
opCtx,
dbName,
nss,
CommandHelpers::filterCommandRequestForPassthrough(cmdObj),
ReadPreferenceSetting::get(opCtx),
Shard::RetryPolicy::kNoRetry);
return appendRawResponses(
opCtx, &errmsg, &output, std::move(shardResponses), {ErrorCodes::NamespaceNotFound});
}
} collectionModCmd;
class ValidateCmd : public PublicGridCommand {
public:
ValidateCmd() : PublicGridCommand("validate") {}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::validate);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
bool run(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& output) {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbName, cmdObj));
auto routingInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getCollectionRoutingInfo(opCtx, nss));
if (!routingInfo.cm()) {
return passthrough(opCtx, dbName, routingInfo.primaryId(), cmdObj, output);
}
const auto cm = routingInfo.cm();
vector<Strategy::CommandResult> results;
const BSONObj query;
Strategy::commandOp(opCtx,
dbName,
CommandHelpers::filterCommandRequestForPassthrough(cmdObj),
cm->getns().ns(),
query,
CollationSpec::kSimpleSpec,
&results);
BSONObjBuilder rawResBuilder(output.subobjStart("raw"));
bool isValid = true;
bool errored = false;
for (const auto& cmdResult : results) {
const ShardId& shardName = cmdResult.shardTargetId;
BSONObj result = cmdResult.result;
const BSONElement valid = result["valid"];
if (!valid.trueValue()) {
isValid = false;
}
if (!result["errmsg"].eoo()) {
// errmsg indicates a user error, so returning the message from one shard is
// sufficient.
output.append(result["errmsg"]);
errored = true;
}
rawResBuilder.append(shardName.toString(), result);
}
rawResBuilder.done();
output.appendBool("valid", isValid);
int code = getUniqueCodeFromCommandResults(results);
if (code != 0) {
output.append("code", code);
output.append("codeName", ErrorCodes::errorString(ErrorCodes::Error(code)));
}
if (errored) {
return false;
}
return true;
}
} validateCmd;
class CreateCmd : public PublicGridCommand {
public:
CreateCmd() : PublicGridCommand("create") {}
Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) override {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbname, cmdObj));
return AuthorizationSession::get(client)->checkAuthForCreate(nss, cmdObj, true);
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
bool run(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
uassertStatusOK(createShardDatabase(opCtx, dbName));
const auto dbInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getDatabase(opCtx, dbName));
return passthrough(opCtx, dbName, dbInfo.primaryId(), cmdObj, result);
}
} createCmd;
class RenameCollectionCmd : public PublicGridCommand {
public:
RenameCollectionCmd() : PublicGridCommand("renameCollection") {}
virtual Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) {
return rename_collection::checkAuthForRenameCollectionCommand(client, dbname, cmdObj);
}
virtual bool adminOnly() const {
return true;
}
virtual bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
bool run(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
const auto fullNsFromElt = cmdObj.firstElement();
uassert(ErrorCodes::InvalidNamespace,
"'renameCollection' must be of type String",
fullNsFromElt.type() == BSONType::String);
const NamespaceString fullnsFrom(fullNsFromElt.valueStringData());
uassert(ErrorCodes::InvalidNamespace,
str::stream() << "Invalid source namespace: " << fullnsFrom.ns(),
fullnsFrom.isValid());
const auto fullnsToElt = cmdObj["to"];
uassert(ErrorCodes::InvalidNamespace,
"'to' must be of type String",
fullnsToElt.type() == BSONType::String);
const NamespaceString fullnsTo(fullnsToElt.valueStringData());
uassert(ErrorCodes::InvalidNamespace,
str::stream() << "Invalid target namespace: " << fullnsTo.ns(),
fullnsTo.isValid());
const auto fromRoutingInfo = uassertStatusOK(
Grid::get(opCtx)->catalogCache()->getCollectionRoutingInfo(opCtx, fullnsFrom));
uassert(13138, "You can't rename a sharded collection", !fromRoutingInfo.cm());
const auto toRoutingInfo = uassertStatusOK(
Grid::get(opCtx)->catalogCache()->getCollectionRoutingInfo(opCtx, fullnsTo));
uassert(13139, "You can't rename to a sharded collection", !toRoutingInfo.cm());
uassert(13137,
"Source and destination collections must be on same shard",
fromRoutingInfo.primaryId() == toRoutingInfo.primaryId());
return adminPassthrough(opCtx, fromRoutingInfo.primaryId(), cmdObj, result);
}
} renameCollectionCmd;
class CopyDBCmd : public PublicGridCommand {
public:
CopyDBCmd() : PublicGridCommand("copydb") {}
bool adminOnly() const override {
return true;
}
Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) override {
return copydb::checkAuthForCopydbCommand(client, dbname, cmdObj);
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
bool run(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
const auto todbElt = cmdObj["todb"];
uassert(ErrorCodes::InvalidNamespace,
"'todb' must be of type String",
todbElt.type() == BSONType::String);
const std::string todb = todbElt.str();
uassert(ErrorCodes::InvalidNamespace,
"Invalid todb argument",
NamespaceString::validDBName(todb, NamespaceString::DollarInDbNameBehavior::Allow));
auto toDbInfo = uassertStatusOK(createShardDatabase(opCtx, todb));
uassert(ErrorCodes::IllegalOperation,
"Cannot copy to a sharded database",
!toDbInfo.shardingEnabled());
const std::string fromhost = cmdObj.getStringField("fromhost");
if (!fromhost.empty()) {
return adminPassthrough(opCtx, toDbInfo.primaryId(), cmdObj, result);
}
const auto fromDbElt = cmdObj["fromdb"];
uassert(ErrorCodes::InvalidNamespace,
"'fromdb' must be of type String",
fromDbElt.type() == BSONType::String);
const std::string fromdb = fromDbElt.str();
uassert(
ErrorCodes::InvalidNamespace,
"invalid fromdb argument",
NamespaceString::validDBName(fromdb, NamespaceString::DollarInDbNameBehavior::Allow));
auto fromDbInfo = uassertStatusOK(createShardDatabase(opCtx, fromdb));
uassert(ErrorCodes::IllegalOperation,
"Cannot copy from a sharded database",
!fromDbInfo.shardingEnabled());
BSONObjBuilder b;
BSONForEach(e, CommandHelpers::filterCommandRequestForPassthrough(cmdObj)) {
if (strcmp(e.fieldName(), "fromhost") != 0) {
b.append(e);
}
}
{
const auto shard = uassertStatusOK(
Grid::get(opCtx)->shardRegistry()->getShard(opCtx, fromDbInfo.primaryId()));
b.append("fromhost", shard->getConnString().toString());
}
return adminPassthrough(opCtx, toDbInfo.primaryId(), b.obj(), result);
}
} clusterCopyDBCmd;
class CollectionStats : public PublicGridCommand {
public:
CollectionStats() : PublicGridCommand("collStats", "collstats") {}
void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) override {
ActionSet actions;
actions.addAction(ActionType::collStats);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
bool run(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
const NamespaceString nss(CommandHelpers::parseNsCollectionRequired(dbName, cmdObj));
auto routingInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getCollectionRoutingInfo(opCtx, nss));
if (!routingInfo.cm()) {
result.appendBool("sharded", false);
result.append("primary", routingInfo.primaryId().toString());
return passthrough(opCtx, dbName, routingInfo.primaryId(), cmdObj, result);
}
const auto cm = routingInfo.cm();
result.appendBool("sharded", true);
BSONObjBuilder shardStats;
map<string, long long> counts;
map<string, long long> indexSizes;
long long unscaledCollSize = 0;
int nindexes = 0;
bool warnedAboutIndexes = false;
set<ShardId> shardIds;
cm->getAllShardIds(&shardIds);
for (const ShardId& shardId : shardIds) {
const auto shardStatus = Grid::get(opCtx)->shardRegistry()->getShard(opCtx, shardId);
if (!shardStatus.isOK()) {
invariant(shardStatus.getStatus() == ErrorCodes::ShardNotFound);
continue;
}
const auto shard = shardStatus.getValue();
BSONObj res;
{
ScopedDbConnection conn(shard->getConnString());
if (!conn->runCommand(
dbName, CommandHelpers::filterCommandRequestForPassthrough(cmdObj), res)) {
if (!res["code"].eoo()) {
result.append(res["code"]);
}
result.append("errmsg", "failed on shard: " + res.toString());
return false;
}
conn.done();
}
BSONObjIterator j(res);
// We don't know the order that we will encounter the count and size
// So we save them until we've iterated through all the fields before
// updating unscaledCollSize.
long long shardObjCount;
long long shardAvgObjSize;
while (j.more()) {
BSONElement e = j.next();
if (str::equals(e.fieldName(), "ns") || str::equals(e.fieldName(), "ok") ||
str::equals(e.fieldName(), "lastExtentSize") ||
str::equals(e.fieldName(), "paddingFactor")) {
continue;
} else if (str::equals(e.fieldName(), "count") ||
str::equals(e.fieldName(), "size") ||
str::equals(e.fieldName(), "storageSize") ||
str::equals(e.fieldName(), "numExtents") ||
str::equals(e.fieldName(), "totalIndexSize")) {
counts[e.fieldName()] += e.numberLong();
if (str::equals(e.fieldName(), "count")) {
shardObjCount = e.numberLong();
}
} else if (str::equals(e.fieldName(), "avgObjSize")) {
shardAvgObjSize = e.numberLong();
} else if (str::equals(e.fieldName(), "indexSizes")) {
BSONObjIterator k(e.Obj());
while (k.more()) {
BSONElement temp = k.next();
indexSizes[temp.fieldName()] += temp.numberLong();
}
}
// no longer used since 2.2
else if (str::equals(e.fieldName(), "flags")) {
if (!result.hasField(e.fieldName()))
result.append(e);
}
// flags broken out in 2.4+
else if (str::equals(e.fieldName(), "systemFlags")) {
if (!result.hasField(e.fieldName()))
result.append(e);
} else if (str::equals(e.fieldName(), "userFlags")) {
if (!result.hasField(e.fieldName()))
result.append(e);
} else if (str::equals(e.fieldName(), "capped")) {
if (!result.hasField(e.fieldName()))
result.append(e);
} else if (str::equals(e.fieldName(), "paddingFactorNote")) {
if (!result.hasField(e.fieldName()))
result.append(e);
} else if (str::equals(e.fieldName(), "indexDetails")) {
// skip this field in the rollup
} else if (str::equals(e.fieldName(), "wiredTiger")) {
// skip this field in the rollup
} else if (str::equals(e.fieldName(), "nindexes")) {
int myIndexes = e.numberInt();
if (nindexes == 0) {
nindexes = myIndexes;
} else if (nindexes == myIndexes) {
// no-op
} else {
// hopefully this means we're building an index
if (myIndexes > nindexes)
nindexes = myIndexes;
if (!warnedAboutIndexes) {
result.append("warning",
"indexes don't all match - ok if ensureIndex is running");
warnedAboutIndexes = true;
}
}
} else {
warning() << "mongos collstats doesn't know about: " << e.fieldName();
}
}
shardStats.append(shardId.toString(), res);
unscaledCollSize += shardAvgObjSize * shardObjCount;
}
result.append("ns", nss.ns());
for (map<string, long long>::iterator i = counts.begin(); i != counts.end(); ++i)
result.appendNumber(i->first, i->second);
{
BSONObjBuilder ib(result.subobjStart("indexSizes"));
for (map<string, long long>::iterator i = indexSizes.begin(); i != indexSizes.end();
++i)
ib.appendNumber(i->first, i->second);
ib.done();
}
// The unscaled avgObjSize for each shard is used to get the unscaledCollSize
// because the raw size returned by the shard is affected by the command's
// scale parameter.
if (counts["count"] > 0)
result.append("avgObjSize", (double)unscaledCollSize / (double)counts["count"]);
else
result.append("avgObjSize", 0.0);
result.append("nindexes", nindexes);
result.append("nchunks", cm->numChunks());
result.append("shards", shardStats.obj());
return true;
}
} collectionStatsCmd;
class DataSizeCmd : public PublicGridCommand {
public:
DataSizeCmd() : PublicGridCommand("dataSize", "datasize") {}
std::string parseNs(const std::string& dbname, const BSONObj& cmdObj) const override {
return CommandHelpers::parseNsFullyQualified(dbname, cmdObj);
}
void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) override {
ActionSet actions;
actions.addAction(ActionType::find);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
bool run(OperationContext* opCtx,
const string& dbName,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
const NamespaceString nss(parseNs(dbName, cmdObj));
auto routingInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getCollectionRoutingInfo(opCtx, nss));
if (!routingInfo.cm()) {
return passthrough(opCtx, dbName, routingInfo.primaryId(), cmdObj, result);
}
const auto cm = routingInfo.cm();
BSONObj min = cmdObj.getObjectField("min");
BSONObj max = cmdObj.getObjectField("max");
BSONObj keyPattern = cmdObj.getObjectField("keyPattern");
uassert(13408,
"keyPattern must equal shard key",
SimpleBSONObjComparator::kInstance.evaluate(cm->getShardKeyPattern().toBSON() ==
keyPattern));
uassert(13405,
str::stream() << "min value " << min << " does not have shard key",
cm->getShardKeyPattern().isShardKey(min));
uassert(13406,
str::stream() << "max value " << max << " does not have shard key",
cm->getShardKeyPattern().isShardKey(max));
min = cm->getShardKeyPattern().normalizeShardKey(min);
max = cm->getShardKeyPattern().normalizeShardKey(max);
// yes these are doubles...
double size = 0;
double numObjects = 0;
int millis = 0;
std::set<ShardId> shardIds;
cm->getShardIdsForRange(min, max, &shardIds);
for (const ShardId& shardId : shardIds) {
const auto shardStatus = Grid::get(opCtx)->shardRegistry()->getShard(opCtx, shardId);
if (!shardStatus.isOK()) {
continue;
}
ScopedDbConnection conn(shardStatus.getValue()->getConnString());
BSONObj res;
bool ok = conn->runCommand(
dbName, CommandHelpers::filterCommandRequestForPassthrough(cmdObj), res);
conn.done();
if (!ok) {
CommandHelpers::filterCommandReplyForPassthrough(res, &result);
return false;
}
size += res["size"].number();
numObjects += res["numObjects"].number();
millis += res["millis"].numberInt();
}
result.append("size", size);
result.append("numObjects", numObjects);
result.append("millis", millis);
return true;
}
} DataSizeCmd;
class ConvertToCappedCmd : public NotAllowedOnShardedCollectionCmd {
public:
ConvertToCappedCmd() : NotAllowedOnShardedCollectionCmd("convertToCapped") {}
void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) override {
ActionSet actions;
actions.addAction(ActionType::convertToCapped);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return true;
}
std::string parseNs(const std::string& dbname, const BSONObj& cmdObj) const override {
return CommandHelpers::parseNsCollectionRequired(dbname, cmdObj).ns();
}
} convertToCappedCmd;
class GroupCmd : public NotAllowedOnShardedCollectionCmd {
public:
GroupCmd() : NotAllowedOnShardedCollectionCmd("group") {}
void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) override {
ActionSet actions;
actions.addAction(ActionType::find);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return false;
}
std::string parseNs(const std::string& dbname, const BSONObj& cmdObj) const override {
const auto nsElt = cmdObj.firstElement().embeddedObjectUserCheck()["ns"];
uassert(ErrorCodes::InvalidNamespace,
"'ns' must be of type String",
nsElt.type() == BSONType::String);
const NamespaceString nss(dbname, nsElt.valueStringData());
uassert(ErrorCodes::InvalidNamespace,
str::stream() << "Invalid namespace: " << nss.ns(),
nss.isValid());
return nss.ns();
}
Status explain(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
ExplainOptions::Verbosity verbosity,
BSONObjBuilder* out) const override {
// We will time how long it takes to run the commands on the shards.
Timer timer;
BSONObj command = ClusterExplain::wrapAsExplain(cmdObj, verbosity);
const NamespaceString nss(parseNs(dbname, cmdObj));
auto routingInfo =
uassertStatusOK(Grid::get(opCtx)->catalogCache()->getCollectionRoutingInfo(opCtx, nss));
uassert(ErrorCodes::IllegalOperation,
str::stream() << "Passthrough command failed: " << command.toString() << " on ns "
<< nss.ns()
<< ". Cannot run on sharded namespace.",
!routingInfo.cm());
BSONObj shardResult;
try {
ShardConnection conn(routingInfo.primary()->getConnString(), "");
// TODO: this can throw a stale config when mongos is not up-to-date -- fix.
if (!conn->runCommand(nss.db().toString(), command, shardResult)) {
conn.done();