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commands_public.cpp
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commands_public.cpp
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// s/commands_public.cpp
/**
* Copyright (C) 2008 10gen 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 <boost/scoped_ptr.hpp>
#include <boost/shared_ptr.hpp>
#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/copydb.h"
#include "mongo/db/commands/find_and_modify.h"
#include "mongo/db/commands/mr.h"
#include "mongo/db/commands/rename_collection.h"
#include "mongo/db/commands.h"
#include "mongo/db/lasterror.h"
#include "mongo/db/pipeline/pipeline.h"
#include "mongo/db/pipeline/document_source.h"
#include "mongo/db/pipeline/expression_context.h"
#include "mongo/db/query/lite_parsed_query.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/s/client_info.h"
#include "mongo/s/cluster_explain.h"
#include "mongo/s/chunk_manager.h"
#include "mongo/s/commands/cluster_commands_common.h"
#include "mongo/s/config.h"
#include "mongo/s/cursors.h"
#include "mongo/s/distlock.h"
#include "mongo/s/grid.h"
#include "mongo/s/stale_exception.h"
#include "mongo/s/strategy.h"
#include "mongo/s/version_manager.h"
#include "mongo/scripting/engine.h"
#include "mongo/util/log.h"
#include "mongo/util/net/message.h"
#include "mongo/util/timer.h"
namespace mongo {
using boost::intrusive_ptr;
using boost::scoped_ptr;
using boost::shared_ptr;
using std::endl;
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 dbgrid_pub_cmds {
namespace {
/**
* Utility function to parse a cursor command response and save the cursor in the
* CursorCache "refs" container. Returns Status::OK() if the cursor was successfully
* saved or no cursor was specified in the command response, and returns an error Status
* if a parsing error was encountered.
*/
Status storePossibleCursor(const std::string& server, const BSONObj& cmdResult) {
if (cmdResult["ok"].trueValue() && cmdResult.hasField("cursor")) {
BSONElement cursorIdElt = cmdResult.getFieldDotted("cursor.id");
if (cursorIdElt.type() != mongo::NumberLong) {
return Status(ErrorCodes::TypeMismatch,
str::stream() << "expected \"cursor.id\" field from shard "
<< "response to have NumberLong type, instead "
<< "got: " << typeName(cursorIdElt.type()));
}
const long long cursorId = cursorIdElt.Long();
if (cursorId != 0) {
BSONElement cursorNsElt = cmdResult.getFieldDotted("cursor.ns");
if (cursorNsElt.type() != mongo::String) {
return Status(ErrorCodes::TypeMismatch,
str::stream() << "expected \"cursor.ns\" field from "
<< "shard response to have String type, "
<< "instead got: "
<< typeName(cursorNsElt.type()));
}
const std::string cursorNs = cursorNsElt.String();
cursorCache.storeRef(server, cursorId, cursorNs);
}
}
return Status::OK();
}
} // namespace
class PublicGridCommand : public Command {
public:
PublicGridCommand( const char* n, const char* oldname=NULL ) : Command( n, false, oldname ) {
}
virtual bool slaveOk() const {
return true;
}
virtual bool adminOnly() const {
return false;
}
// Override if passthrough should also send query options
// Safer as off by default, can slowly enable as we add more tests
virtual bool passOptions() const { return false; }
// all grid commands are designed not to lock
virtual bool isWriteCommandForConfigServer() const { return false; }
protected:
bool passthrough( DBConfigPtr conf, const BSONObj& cmdObj , BSONObjBuilder& result ) {
return _passthrough(conf->name(), conf, cmdObj, 0, result);
}
bool adminPassthrough( DBConfigPtr conf, const BSONObj& cmdObj , BSONObjBuilder& result ) {
return _passthrough("admin", conf, cmdObj, 0, result);
}
bool passthrough( DBConfigPtr conf, const BSONObj& cmdObj , int options, BSONObjBuilder& result ) {
return _passthrough(conf->name(), conf, cmdObj, options, result);
}
private:
bool _passthrough(const string& db, DBConfigPtr conf, const BSONObj& cmdObj , int options , BSONObjBuilder& result ) {
ShardConnection conn( conf->getPrimary() , "" );
BSONObj res;
bool ok = conn->runCommand( db , cmdObj , res , passOptions() ? options : 0 );
if ( ! ok && res["code"].numberInt() == SendStaleConfigCode ) {
conn.done();
throw RecvStaleConfigException( "command failed because of stale config", res );
}
result.appendElements( res );
conn.done();
return ok;
}
};
class RunOnAllShardsCommand : public Command {
public:
RunOnAllShardsCommand(const char* n,
const char* oldname=NULL,
bool useShardConn = false):
Command(n, false, oldname),
_useShardConn(useShardConn) {
}
virtual bool slaveOk() const { return true; }
virtual bool adminOnly() const { return false; }
// all grid commands are designed not to lock
virtual bool isWriteCommandForConfigServer() const { return false; }
// default impl uses all shards for DB
virtual void getShards(const string& dbName , BSONObj& cmdObj, set<Shard>& shards) {
vector<Shard> shardList;
Shard::getAllShards(shardList);
shards.insert(shardList.begin(), shardList.end());
}
virtual void aggregateResults(const vector<BSONObj>& results, BSONObjBuilder& output) {}
virtual BSONObj specialErrorHandler( const string& server,
const string& dbName,
const BSONObj& cmdObj,
const BSONObj& originalResult ) const {
return originalResult;
}
// don't override
virtual bool run(OperationContext* txn, const string& dbName , BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& output, bool) {
LOG(1) << "RunOnAllShardsCommand db: " << dbName << " cmd:" << cmdObj << endl;
set<Shard> shards;
getShards(dbName, cmdObj, shards);
// TODO: Future is deprecated, replace with commandOp()
list< shared_ptr<Future::CommandResult> > futures;
for ( set<Shard>::const_iterator i=shards.begin(), end=shards.end() ; i != end ; i++ ) {
futures.push_back( Future::spawnCommand( i->getConnString(),
dbName,
cmdObj,
0,
NULL,
_useShardConn ));
}
vector<BSONObj> results;
BSONObjBuilder subobj (output.subobjStart("raw"));
BSONObjBuilder errors;
int commonErrCode = -1;
for ( list< shared_ptr<Future::CommandResult> >::iterator i=futures.begin(); i!=futures.end(); i++ ) {
shared_ptr<Future::CommandResult> res = *i;
if ( res->join() ) {
// success :)
BSONObj result = res->result();
results.push_back( result );
subobj.append( res->getServer(), result );
continue;
}
BSONObj result = res->result();
if ( result["errmsg"].type() ||
result["code"].numberInt() != 0 ) {
result = specialErrorHandler( res->getServer(), dbName, cmdObj, result );
BSONElement errmsg = result["errmsg"];
if ( errmsg.eoo() || errmsg.String().empty() ) {
// it was fixed!
results.push_back( result );
subobj.append( res->getServer(), result );
continue;
}
}
// Handle "errmsg".
if( ! result["errmsg"].eoo() ){
errors.appendAs(result["errmsg"], res->getServer());
}
else {
// Can happen if message is empty, for some reason
errors.append( res->getServer(), str::stream() <<
"result without error message returned : " << result );
}
// Handle "code".
int errCode = result["code"].numberInt();
if ( commonErrCode == -1 ) {
commonErrCode = errCode;
}
else if ( commonErrCode != errCode ) {
commonErrCode = 0;
}
results.push_back( result );
subobj.append( res->getServer(), result );
}
subobj.done();
BSONObj errobj = errors.done();
if (! errobj.isEmpty()) {
errmsg = errobj.toString(false, true);
// If every error has a code, and the code for all errors is the same, then add
// a top-level field "code" with this value to the output object.
if ( commonErrCode > 0 ) {
output.append( "code", commonErrCode );
}
return false;
}
aggregateResults(results, output);
return true;
}
private:
bool _useShardConn; // use ShardConnection as opposed to ScopedDbConnection
};
class AllShardsCollectionCommand : public RunOnAllShardsCommand {
public:
AllShardsCollectionCommand(const char* n,
const char* oldname = NULL,
bool useShardConn = false):
RunOnAllShardsCommand(n, oldname, useShardConn) {
}
virtual void getShards(const string& dbName , BSONObj& cmdObj, set<Shard>& shards) {
string fullns = dbName + '.' + cmdObj.firstElement().valuestrsafe();
DBConfigPtr conf = grid.getDBConfig( dbName , false );
uassert(28588,
str::stream() << "Failed to load db sharding metadata for " << fullns,
conf);
if (!conf->isShardingEnabled() || !conf->isSharded(fullns)) {
shards.insert(conf->getShard(fullns));
}
else {
vector<Shard> shardList;
Shard::getAllShards(shardList);
shards.insert(shardList.begin(), shardList.end());
}
}
};
class NotAllowedOnShardedCollectionCmd : public PublicGridCommand {
public:
NotAllowedOnShardedCollectionCmd( const char * n ) : PublicGridCommand( n ) {}
// TODO(spencer): remove this in favor of using parseNs
virtual string getFullNS( const string& dbName , const BSONObj& cmdObj ) = 0;
virtual bool run(OperationContext* txn, const string& dbName , BSONObj& cmdObj, int options, string& errmsg, BSONObjBuilder& result, bool) {
string fullns = getFullNS( dbName , cmdObj );
DBConfigPtr conf = grid.getDBConfig( dbName , false );
if (!conf) {
errmsg = str::stream() << "Failed to load db sharding metadata for " << dbName;
return false;
}
if (!conf->isShardingEnabled() || !conf->isSharded(fullns)) {
return passthrough( conf , cmdObj , options, result );
}
errmsg = "can't do command: " + name + " on sharded collection";
return false;
}
};
// ----
class DropIndexesCmd : public AllShardsCollectionCommand {
public:
DropIndexesCmd() : AllShardsCollectionCommand("dropIndexes", "deleteIndexes") {}
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));
}
} dropIndexesCmd;
class CreateIndexesCmd : public AllShardsCollectionCommand {
public:
CreateIndexesCmd():
AllShardsCollectionCommand("createIndexes",
NULL, /* oldName */
true /* use ShardConnection */) {
// createIndexes command should use ShardConnection so the getLastError would
// be able to properly enforce the write concern (via the saveGLEStats callback).
}
/**
* the createIndexes command doesn't require the 'ns' field to be populated
* so we make sure its here as its needed for the system.indexes insert
*/
BSONObj fixSpec( const NamespaceString& ns, const BSONObj& original ) const {
if ( original["ns"].type() == String )
return original;
BSONObjBuilder bb;
bb.appendElements( original );
bb.append( "ns", ns.toString() );
return bb.obj();
}
/**
* @return equivalent of gle
*/
BSONObj createIndexLegacy( const string& server,
const NamespaceString& nss,
const BSONObj& spec ) const {
try {
ScopedDbConnection conn( server );
conn->insert( nss.getSystemIndexesCollection(), spec );
BSONObj gle = conn->getLastErrorDetailed( nss.db().toString() );
conn.done();
return gle;
}
catch ( DBException& e ) {
BSONObjBuilder b;
b.append( "errmsg", e.toString() );
b.append( "code", e.getCode() );
return b.obj();
}
}
virtual BSONObj specialErrorHandler( const string& server,
const string& dbName,
const BSONObj& cmdObj,
const BSONObj& originalResult ) const {
string errmsg = originalResult["errmsg"];
if ( errmsg.find( "no such cmd" ) == string::npos ) {
// cannot use codes as 2.4 didn't have a code for this
return originalResult;
}
// we need to down convert
NamespaceString nss( dbName, cmdObj["createIndexes"].String() );
if ( cmdObj["indexes"].type() != Array )
return originalResult;
BSONObjBuilder newResult;
newResult.append( "note", "downgraded" );
newResult.append( "sentTo", server );
BSONArrayBuilder individualResults;
bool ok = true;
BSONObjIterator indexIterator( cmdObj["indexes"].Obj() );
while ( indexIterator.more() ) {
BSONObj spec = indexIterator.next().Obj();
spec = fixSpec( nss, spec );
BSONObj gle = createIndexLegacy( server, nss, spec );
individualResults.append( BSON( "spec" << spec <<
"gle" << gle ) );
BSONElement e = gle["errmsg"];
if ( e.type() == String && e.String().size() > 0 ) {
ok = false;
newResult.appendAs( e, "errmsg" );
break;
}
e = gle["err"];
if ( e.type() == String && e.String().size() > 0 ) {
ok = false;
newResult.appendAs( e, "errmsg" );
break;
}
}
newResult.append( "eachIndex", individualResults.arr() );
newResult.append( "ok", ok ? 1 : 0 );
return newResult.obj();
}
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));
}
} createIndexesCmd;
class ReIndexCmd : public AllShardsCollectionCommand {
public:
ReIndexCmd() : AllShardsCollectionCommand("reIndex") {}
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));
}
} reIndexCmd;
class CollectionModCmd : public AllShardsCollectionCommand {
public:
CollectionModCmd() : AllShardsCollectionCommand("collMod") {}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::collMod);
out->push_back(Privilege(parseResourcePattern(dbname, cmdObj), actions));
}
} collectionModCmd;
class ProfileCmd : public PublicGridCommand {
public:
ProfileCmd() : PublicGridCommand("profile") {}
virtual bool run(OperationContext* txn, const string& dbName , BSONObj& cmdObj, int options, string& errmsg, BSONObjBuilder& result, bool) {
errmsg = "profile currently not supported via mongos";
return false;
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
ActionSet actions;
actions.addAction(ActionType::enableProfiler);
out->push_back(Privilege(ResourcePattern::forDatabaseName(dbname), actions));
}
} profileCmd;
class ValidateCmd : public AllShardsCollectionCommand {
public:
ValidateCmd() : AllShardsCollectionCommand("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 void aggregateResults(const vector<BSONObj>& results, BSONObjBuilder& output) {
for (vector<BSONObj>::const_iterator it(results.begin()), end(results.end()); it!=end; it++){
const BSONObj& result = *it;
const BSONElement valid = result["valid"];
if (!valid.eoo()){
if (!valid.trueValue()) {
output.appendBool("valid", false);
return;
}
}
else {
// Support pre-1.9.0 output with everything in a big string
const char* s = result["result"].valuestrsafe();
if (strstr(s, "exception") || strstr(s, "corrupt")){
output.appendBool("valid", false);
return;
}
}
}
output.appendBool("valid", true);
}
} validateCmd;
class RepairDatabaseCmd : public RunOnAllShardsCommand {
public:
RepairDatabaseCmd() : RunOnAllShardsCommand("repairDatabase") {}
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));
}
} repairDatabaseCmd;
class DBStatsCmd : public RunOnAllShardsCommand {
public:
DBStatsCmd() : RunOnAllShardsCommand("dbStats", "dbstats") {}
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));
}
virtual void aggregateResults(const vector<BSONObj>& results, BSONObjBuilder& output) {
long long objects = 0;
long long unscaledDataSize = 0;
long long dataSize = 0;
long long storageSize = 0;
long long numExtents = 0;
long long indexes = 0;
long long indexSize = 0;
long long fileSize = 0;
long long freeListNum = 0;
long long freeListSize = 0;
for (vector<BSONObj>::const_iterator it(results.begin()), end(results.end()); it != end; ++it) {
const BSONObj& b = *it;
objects += b["objects"].numberLong();
unscaledDataSize += b["avgObjSize"].numberLong() * b["objects"].numberLong();
dataSize += b["dataSize"].numberLong();
storageSize += b["storageSize"].numberLong();
numExtents += b["numExtents"].numberLong();
indexes += b["indexes"].numberLong();
indexSize += b["indexSize"].numberLong();
fileSize += b["fileSize"].numberLong();
if ( b["extentFreeList"].isABSONObj() ) {
freeListNum += b["extentFreeList"].Obj()["num"].numberLong();
freeListSize += b["extentFreeList"].Obj()["totalSize"].numberLong();
}
}
//result.appendNumber( "collections" , ncollections ); //TODO: need to find a good way to get this
output.appendNumber( "objects" , objects );
/* avgObjSize on mongod is not scaled based on the argument to db.stats(), so we use
* unscaledDataSize here for consistency. See SERVER-7347. */
output.append ( "avgObjSize" , objects == 0 ? 0 : double(unscaledDataSize) /
double(objects) );
output.appendNumber( "dataSize" , dataSize );
output.appendNumber( "storageSize" , storageSize);
output.appendNumber( "numExtents" , numExtents );
output.appendNumber( "indexes" , indexes );
output.appendNumber( "indexSize" , indexSize );
output.appendNumber( "fileSize" , fileSize );
{
BSONObjBuilder extentFreeList( output.subobjStart( "extentFreeList" ) );
extentFreeList.appendNumber( "num", freeListNum );
extentFreeList.appendNumber( "totalSize", freeListSize );
extentFreeList.done();
}
}
} DBStatsCmdObj;
class CreateCmd : public PublicGridCommand {
public:
CreateCmd() : PublicGridCommand( "create" ) {}
virtual Status checkAuthForCommand(ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj) {
AuthorizationSession* authzSession = client->getAuthorizationSession();
if (cmdObj["capped"].trueValue()) {
if (!authzSession->isAuthorizedForActionsOnResource(
parseResourcePattern(dbname, cmdObj), ActionType::convertToCapped)) {
return Status(ErrorCodes::Unauthorized, "unauthorized");
}
}
// ActionType::createCollection or ActionType::insert are both acceptable
if (authzSession->isAuthorizedForActionsOnResource(
parseResourcePattern(dbname, cmdObj), ActionType::createCollection) ||
authzSession->isAuthorizedForActionsOnResource(
parseResourcePattern(dbname, cmdObj), ActionType::insert)) {
return Status::OK();
}
return Status(ErrorCodes::Unauthorized, "unauthorized");
}
bool run(OperationContext* txn, const string& dbName,
BSONObj& cmdObj,
int,
string& errmsg,
BSONObjBuilder& result,
bool) {
DBConfigPtr conf = grid.getDBConfig( dbName , false );
if (!conf) {
errmsg = str::stream() << "Failed to load db sharding metadata for " << dbName;
return false;
}
return passthrough( conf , cmdObj , result );
}
} createCmd;
class DropCmd : public PublicGridCommand {
public:
DropCmd() : PublicGridCommand( "drop" ) {}
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));
}
bool run(OperationContext* txn, const string& dbName , BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool) {
string collection = cmdObj.firstElement().valuestrsafe();
string fullns = dbName + "." + collection;
DBConfigPtr conf = grid.getDBConfig( dbName , false );
log() << "DROP: " << fullns << endl;
if (!conf) {
errmsg = str::stream() << "Failed to load db sharding metadata for " << dbName;
return false;
}
if (!conf->isShardingEnabled() || !conf->isSharded(fullns)) {
log() << "\tdrop going to do passthrough" << endl;
return passthrough( conf , cmdObj , result );
}
//
// TODO: There will be problems if we simultaneously shard and drop a collection
//
ChunkManagerPtr cm;
ShardPtr primary;
conf->getChunkManagerOrPrimary( fullns, cm, primary );
if( ! cm ) {
log() << "\tdrop going to do passthrough after re-check" << endl;
return passthrough( conf , cmdObj , result );
}
cm->drop();
if( ! conf->removeSharding( fullns ) ){
warning() << "collection " << fullns
<< " was reloaded as unsharded before drop completed"
<< " during single drop" << endl;
}
return 1;
}
} dropCmd;
class RenameCollectionCmd : public PublicGridCommand {
public:
RenameCollectionCmd() : PublicGridCommand( "renameCollection" ) {}
virtual Status checkAuthForCommand(ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj) {
return rename_collection::checkAuthForRenameCollectionCommand(client,
dbname,
cmdObj);
}
virtual bool adminOnly() const {
return true;
}
bool run(OperationContext* txn, const string& dbName, BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool) {
string fullnsFrom = cmdObj.firstElement().valuestrsafe();
string dbNameFrom = nsToDatabase( fullnsFrom );
DBConfigPtr confFrom = grid.getDBConfig( dbNameFrom , false );
string fullnsTo = cmdObj["to"].valuestrsafe();
string dbNameTo = nsToDatabase( fullnsTo );
DBConfigPtr confTo = grid.getDBConfig( dbNameTo , false );
uassert(13140, "Don't recognize source or target DB", confFrom && confTo);
uassert(13138, "You can't rename a sharded collection", !confFrom->isSharded(fullnsFrom));
uassert(13139, "You can't rename to a sharded collection", !confTo->isSharded(fullnsTo));
const Shard& shardTo = confTo->getShard(fullnsTo);
const Shard& shardFrom = confFrom->getShard(fullnsFrom);
uassert(13137, "Source and destination collections must be on same shard", shardFrom == shardTo);
return adminPassthrough( confFrom , cmdObj , result );
}
} renameCollectionCmd;
class CopyDBCmd : public PublicGridCommand {
public:
CopyDBCmd() : PublicGridCommand( "copydb" ) {}
virtual bool adminOnly() const {
return true;
}
virtual Status checkAuthForCommand(ClientBasic* client,
const std::string& dbname,
const BSONObj& cmdObj) {
return copydb::checkAuthForCopydbCommand(client, dbname, cmdObj);
}
bool run(OperationContext* txn, const string& dbName, BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool) {
string todb = cmdObj.getStringField("todb");
uassert(13402, "need a todb argument", !todb.empty());
DBConfigPtr confTo = grid.getDBConfig( todb );
uassert(13398, "cant copy to sharded DB", !confTo->isShardingEnabled());
string fromhost = cmdObj.getStringField("fromhost");
if (!fromhost.empty()) {
return adminPassthrough( confTo , cmdObj , result );
}
else {
string fromdb = cmdObj.getStringField("fromdb");
uassert(13399, "need a fromdb argument", !fromdb.empty());
DBConfigPtr confFrom = grid.getDBConfig( fromdb , false );
uassert(13400, "don't know where source DB is", confFrom);
uassert(13401, "cant copy from sharded DB", !confFrom->isShardingEnabled());
BSONObjBuilder b;
BSONForEach(e, cmdObj) {
if (strcmp(e.fieldName(), "fromhost") != 0)
b.append(e);
}
b.append("fromhost", confFrom->getPrimary().getConnString());
BSONObj fixed = b.obj();
return adminPassthrough( confTo , fixed , result );
}
}
} clusterCopyDBCmd;
class CollectionStats : public PublicGridCommand {
public:
CollectionStats() : PublicGridCommand("collStats", "collstats") { }
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& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool) {
string collection = cmdObj.firstElement().valuestrsafe();
string fullns = dbName + "." + collection;
DBConfigPtr conf = grid.getDBConfig( dbName , false );
if (!conf) {
errmsg = str::stream() << "Failed to load db sharding metadata for " << dbName;
return false;
}
if (!conf->isShardingEnabled() || !conf->isSharded(fullns)) {
result.appendBool("sharded", false);
result.append( "primary" , conf->getPrimary().getName() );
return passthrough( conf , cmdObj , result);
}
result.appendBool("sharded", true);
ChunkManagerPtr cm = conf->getChunkManager( fullns );
massert( 12594 , "how could chunk manager be null!" , cm );
set<Shard> servers;
cm->getAllShards(servers);
BSONObjBuilder shardStats;
map<string,long long> counts;
map<string,long long> indexSizes;
/*
long long count=0;
long long size=0;
long long storageSize=0;
*/
int nindexes=0;
bool warnedAboutIndexes = false;
for ( set<Shard>::iterator i=servers.begin(); i!=servers.end(); i++ ) {
BSONObj res;
{
ScopedDbConnection conn(i->getConnString());
if ( ! conn->runCommand( dbName , cmdObj , res ) ) {
if ( !res["code"].eoo() ) {
result.append( res["code"] );
}
errmsg = "failed on shard: " + res.toString();
return false;
}
conn.done();
}
BSONObjIterator j( res );
while ( j.more() ) {
BSONElement e = j.next();
if ( str::equals( e.fieldName() , "ns" ) ||
str::equals( e.fieldName() , "ok" ) ||
str::equals( e.fieldName() , "avgObjSize" ) ||
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();
}
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() << endl;
}
}
shardStats.append(i->getName(), res);
}
result.append("ns", fullns);
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();
}
if ( counts["count"] > 0 )
result.append("avgObjSize", (double)counts["size"] / (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 FindAndModifyCmd : public PublicGridCommand {
public:
FindAndModifyCmd() : PublicGridCommand("findAndModify", "findandmodify") { }
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
find_and_modify::addPrivilegesRequiredForFindAndModify(this, dbname, cmdObj, out);
}
bool run(OperationContext* txn, const string& dbName, BSONObj& cmdObj, int, string& errmsg, BSONObjBuilder& result, bool) {
string collection = cmdObj.firstElement().valuestrsafe();
string fullns = dbName + "." + collection;
DBConfigPtr conf = grid.getDBConfig( dbName , false );
if (!conf) {
errmsg = str::stream() << "Failed to load db sharding metadata for " << dbName;
return false;
}
if (!conf->isShardingEnabled() || !conf->isSharded(fullns)) {
return passthrough( conf , cmdObj , result);
}
ChunkManagerPtr cm = conf->getChunkManager( fullns );
massert( 13002 , "shard internal error chunk manager should never be null" , cm );
BSONObj filter = cmdObj.getObjectField("query");
StatusWith<BSONObj> status =
cm->getShardKeyPattern().extractShardKeyFromQuery(filter);
// Bad query
if (!status.isOK())
return appendCommandStatus(result, status.getStatus());
BSONObj shardKey = status.getValue();
uassert(13343, "query for sharded findAndModify must have shardkey",