/
XrdClStream.cc
1243 lines (1108 loc) · 47 KB
/
XrdClStream.cc
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//------------------------------------------------------------------------------
// Copyright (c) 2011-2014 by European Organization for Nuclear Research (CERN)
// Author: Lukasz Janyst <ljanyst@cern.ch>
//------------------------------------------------------------------------------
// This file is part of the XRootD software suite.
//
// XRootD is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// XRootD 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 General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with XRootD. If not, see <http://www.gnu.org/licenses/>.
//
// In applying this licence, CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
//------------------------------------------------------------------------------
#include "XrdCl/XrdClStream.hh"
#include "XrdCl/XrdClSocket.hh"
#include "XrdCl/XrdClChannel.hh"
#include "XrdCl/XrdClConstants.hh"
#include "XrdCl/XrdClLog.hh"
#include "XrdCl/XrdClMessage.hh"
#include "XrdCl/XrdClDefaultEnv.hh"
#include "XrdCl/XrdClUtils.hh"
#include "XrdCl/XrdClOutQueue.hh"
#include "XrdCl/XrdClMonitor.hh"
#include "XrdCl/XrdClMessageUtils.hh"
#include "XrdCl/XrdClXRootDTransport.hh"
#include "XrdCl/XrdClXRootDMsgHandler.hh"
#include "XrdClAsyncSocketHandler.hh"
#include <sys/types.h>
#include <algorithm>
#include <sys/socket.h>
#include <sys/time.h>
namespace XrdCl
{
//----------------------------------------------------------------------------
// Statics
//----------------------------------------------------------------------------
RAtomic_uint64_t Stream::sSessCntGen{0};
//----------------------------------------------------------------------------
// Incoming message helper
//----------------------------------------------------------------------------
struct InMessageHelper
{
InMessageHelper( Message *message = 0,
MsgHandler *hndlr = 0,
time_t expir = 0,
uint16_t actio = 0 ):
msg( message ), handler( hndlr ), expires( expir ), action( actio ) {}
void Reset()
{
msg = 0; handler = 0; expires = 0; action = 0;
}
Message *msg;
MsgHandler *handler;
time_t expires;
uint16_t action;
};
//----------------------------------------------------------------------------
// Sub stream helper
//----------------------------------------------------------------------------
struct SubStreamData
{
SubStreamData(): socket( 0 ), status( Socket::Disconnected )
{
outQueue = new OutQueue();
}
~SubStreamData()
{
delete socket;
delete outQueue;
}
AsyncSocketHandler *socket;
OutQueue *outQueue;
OutQueue::MsgHelper outMsgHelper;
InMessageHelper inMsgHelper;
Socket::SocketStatus status;
};
//----------------------------------------------------------------------------
// Constructor
//----------------------------------------------------------------------------
Stream::Stream( const URL *url, const URL &prefer ):
pUrl( url ),
pPrefer( prefer ),
pTransport( 0 ),
pPoller( 0 ),
pTaskManager( 0 ),
pJobManager( 0 ),
pIncomingQueue( 0 ),
pChannelData( 0 ),
pLastStreamError( 0 ),
pConnectionCount( 0 ),
pConnectionInitTime( 0 ),
pAddressType( Utils::IPAll ),
pSessionId( 0 ),
pBytesSent( 0 ),
pBytesReceived( 0 )
{
pConnectionStarted.tv_sec = 0; pConnectionStarted.tv_usec = 0;
pConnectionDone.tv_sec = 0; pConnectionDone.tv_usec = 0;
std::ostringstream o;
o << pUrl->GetHostId();
pStreamName = o.str();
pConnectionWindow = Utils::GetIntParameter( *url, "ConnectionWindow",
DefaultConnectionWindow );
pConnectionRetry = Utils::GetIntParameter( *url, "ConnectionRetry",
DefaultConnectionRetry );
pStreamErrorWindow = Utils::GetIntParameter( *url, "StreamErrorWindow",
DefaultStreamErrorWindow );
std::string netStack = Utils::GetStringParameter( *url, "NetworkStack",
DefaultNetworkStack );
pAddressType = Utils::String2AddressType( netStack );
if( pAddressType == Utils::AddressType::IPAuto )
{
XrdNetUtils::NetProt stacks = XrdNetUtils::NetConfig( XrdNetUtils::NetType::qryINIF );
if( !( stacks & XrdNetUtils::hasIP64 ) )
{
if( stacks & XrdNetUtils::hasIPv4 )
pAddressType = Utils::AddressType::IPv4;
else if( stacks & XrdNetUtils::hasIPv6 )
pAddressType = Utils::AddressType::IPv6;
}
}
Log *log = DefaultEnv::GetLog();
log->Debug( PostMasterMsg, "[%s] Stream parameters: Network Stack: %s, "
"Connection Window: %d, ConnectionRetry: %d, Stream Error "
"Window: %d", pStreamName.c_str(), netStack.c_str(),
pConnectionWindow, pConnectionRetry, pStreamErrorWindow );
}
//----------------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------------
Stream::~Stream()
{
Disconnect( true );
Log *log = DefaultEnv::GetLog();
log->Debug( PostMasterMsg, "[%s] Destroying stream",
pStreamName.c_str() );
MonitorDisconnection( XRootDStatus() );
SubStreamList::iterator it;
for( it = pSubStreams.begin(); it != pSubStreams.end(); ++it )
delete *it;
}
//----------------------------------------------------------------------------
// Initializer
//----------------------------------------------------------------------------
XRootDStatus Stream::Initialize()
{
if( !pTransport || !pPoller || !pChannelData )
return XRootDStatus( stError, errUninitialized );
AsyncSocketHandler *s = new AsyncSocketHandler( *pUrl, pPoller, pTransport,
pChannelData, 0, this );
pSubStreams.push_back( new SubStreamData() );
pSubStreams[0]->socket = s;
return XRootDStatus();
}
//------------------------------------------------------------------------
// Make sure that the underlying socket handler gets write readiness
// events
//------------------------------------------------------------------------
XRootDStatus Stream::EnableLink( PathID &path )
{
XrdSysMutexHelper scopedLock( pMutex );
//--------------------------------------------------------------------------
// We are in the process of connecting the main stream, so we do nothing
// because when the main stream connection is established it will connect
// all the other streams
//--------------------------------------------------------------------------
if( pSubStreams[0]->status == Socket::Connecting )
return XRootDStatus();
//--------------------------------------------------------------------------
// The main stream is connected, so we can verify whether we have
// the up and the down stream connected and ready to handle data.
// If anything is not right we fall back to stream 0.
//--------------------------------------------------------------------------
if( pSubStreams[0]->status == Socket::Connected )
{
if( pSubStreams[path.down]->status != Socket::Connected )
path.down = 0;
if( pSubStreams[path.up]->status == Socket::Disconnected )
{
path.up = 0;
return pSubStreams[0]->socket->EnableUplink();
}
if( pSubStreams[path.up]->status == Socket::Connected )
return pSubStreams[path.up]->socket->EnableUplink();
return XRootDStatus();
}
//--------------------------------------------------------------------------
// The main stream is not connected, we need to check whether enough time
// has passed since we last encountered an error (if any) so that we could
// re-attempt the connection
//--------------------------------------------------------------------------
Log *log = DefaultEnv::GetLog();
time_t now = ::time(0);
if( now-pLastStreamError < pStreamErrorWindow )
return pLastFatalError;
gettimeofday( &pConnectionStarted, 0 );
++pConnectionCount;
//--------------------------------------------------------------------------
// Resolve all the addresses of the host we're supposed to connect to
//--------------------------------------------------------------------------
XRootDStatus st = Utils::GetHostAddresses( pAddresses, *pUrl, pAddressType );
if( !st.IsOK() )
{
log->Error( PostMasterMsg, "[%s] Unable to resolve IP address for "
"the host", pStreamName.c_str() );
pLastStreamError = now;
st.status = stFatal;
pLastFatalError = st;
return st;
}
if( pPrefer.IsValid() )
{
std::vector<XrdNetAddr> addrresses;
XRootDStatus st = Utils::GetHostAddresses( addrresses, pPrefer, pAddressType );
if( !st.IsOK() )
{
log->Error( PostMasterMsg, "[%s] Unable to resolve IP address for %s",
pStreamName.c_str(), pPrefer.GetHostName().c_str() );
}
else
{
std::vector<XrdNetAddr> tmp;
tmp.reserve( pAddresses.size() );
// first add all remaining addresses
auto itr = pAddresses.begin();
for( ; itr != pAddresses.end() ; ++itr )
{
if( !HasNetAddr( *itr, addrresses ) )
tmp.push_back( *itr );
}
// then copy all 'preferred' addresses
std::copy( addrresses.begin(), addrresses.end(), std::back_inserter( tmp ) );
// and keep the result
pAddresses.swap( tmp );
}
}
Utils::LogHostAddresses( log, PostMasterMsg, pUrl->GetHostId(),
pAddresses );
while( !pAddresses.empty() )
{
pSubStreams[0]->socket->SetAddress( pAddresses.back() );
pAddresses.pop_back();
pConnectionInitTime = ::time( 0 );
st = pSubStreams[0]->socket->Connect( pConnectionWindow );
if( st.IsOK() )
{
pSubStreams[0]->status = Socket::Connecting;
break;
}
}
return st;
}
//----------------------------------------------------------------------------
// Queue the message for sending
//----------------------------------------------------------------------------
XRootDStatus Stream::Send( Message *msg,
MsgHandler *handler,
bool stateful,
time_t expires )
{
XrdSysMutexHelper scopedLock( pMutex );
Log *log = DefaultEnv::GetLog();
//--------------------------------------------------------------------------
// Check the session ID and bounce if needed
//--------------------------------------------------------------------------
if( msg->GetSessionId() &&
(pSubStreams[0]->status != Socket::Connected ||
pSessionId != msg->GetSessionId()) )
return XRootDStatus( stError, errInvalidSession );
//--------------------------------------------------------------------------
// Decide on the path to send the message
//--------------------------------------------------------------------------
PathID path = pTransport->MultiplexSubStream( msg, *pChannelData );
if( pSubStreams.size() <= path.up )
{
log->Warning( PostMasterMsg, "[%s] Unable to send message %s through "
"substream %d, using 0 instead", pStreamName.c_str(),
msg->GetDescription().c_str(), path.up );
path.up = 0;
}
log->Dump( PostMasterMsg, "[%s] Sending message %s (0x%x) through "
"substream %d expecting answer at %d", pStreamName.c_str(),
msg->GetDescription().c_str(), msg, path.up, path.down );
//--------------------------------------------------------------------------
// Enable *a* path and insert the message to the right queue
//--------------------------------------------------------------------------
XRootDStatus st = EnableLink( path );
if( st.IsOK() )
{
pTransport->MultiplexSubStream( msg, *pChannelData, &path );
pSubStreams[path.up]->outQueue->PushBack( msg, handler,
expires, stateful );
}
else
st.status = stFatal;
return st;
}
//----------------------------------------------------------------------------
// Force connection
//----------------------------------------------------------------------------
void Stream::ForceConnect()
{
XrdSysMutexHelper scopedLock( pMutex );
if( pSubStreams[0]->status == Socket::Connecting )
{
pSubStreams[0]->status = Socket::Disconnected;
XrdCl::PathID path( 0, 0 );
XrdCl::XRootDStatus st = EnableLink( path );
if( !st.IsOK() )
OnConnectError( 0, st );
}
}
//----------------------------------------------------------------------------
// Disconnect the stream
//----------------------------------------------------------------------------
void Stream::Disconnect( bool /*force*/ )
{
XrdSysMutexHelper scopedLock( pMutex );
SubStreamList::iterator it;
for( it = pSubStreams.begin(); it != pSubStreams.end(); ++it )
{
(*it)->socket->Close();
(*it)->status = Socket::Disconnected;
}
}
//----------------------------------------------------------------------------
// Handle a clock event
//----------------------------------------------------------------------------
void Stream::Tick( time_t now )
{
//--------------------------------------------------------------------------
// Check for timed-out requests and incoming handlers
//--------------------------------------------------------------------------
pMutex.Lock();
OutQueue q;
SubStreamList::iterator it;
for( it = pSubStreams.begin(); it != pSubStreams.end(); ++it )
q.GrabExpired( *(*it)->outQueue, now );
pMutex.UnLock();
q.Report( XRootDStatus( stError, errOperationExpired ) );
pIncomingQueue->ReportTimeout( now );
}
}
//------------------------------------------------------------------------------
// Handle message timeouts and reconnection in the future
//------------------------------------------------------------------------------
namespace
{
class StreamConnectorTask: public XrdCl::Task
{
public:
//------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------
StreamConnectorTask( const XrdCl::URL &url, const std::string &n ):
url( url )
{
std::string name = "StreamConnectorTask for ";
name += n;
SetName( name );
}
//------------------------------------------------------------------------
// Run the task
//------------------------------------------------------------------------
time_t Run( time_t )
{
XrdCl::DefaultEnv::GetPostMaster()->ForceReconnect( url );
return 0;
}
private:
XrdCl::URL url;
};
}
namespace XrdCl
{
XRootDStatus Stream::RequestClose( Message &response )
{
ServerResponse *rsp = reinterpret_cast<ServerResponse*>( response.GetBuffer() );
if( rsp->hdr.dlen < 4 ) return XRootDStatus( stError );
Message *msg;
ClientCloseRequest *req;
MessageUtils::CreateRequest( msg, req );
req->requestid = kXR_close;
memcpy( req->fhandle, reinterpret_cast<uint8_t*>( rsp->body.buffer.data ), 4 );
XRootDTransport::SetDescription( msg );
msg->SetSessionId( pSessionId );
NullResponseHandler *handler = new NullResponseHandler();
MessageSendParams params;
params.timeout = 0;
params.followRedirects = false;
params.stateful = true;
MessageUtils::ProcessSendParams( params );
return MessageUtils::SendMessage( *pUrl, msg, handler, params, 0 );
}
//------------------------------------------------------------------------
// Check if message is a partial response
//------------------------------------------------------------------------
bool Stream::IsPartial( Message &msg )
{
ServerResponseHeader *rsphdr = (ServerResponseHeader*)msg.GetBuffer();
if( rsphdr->status == kXR_oksofar )
return true;
if( rsphdr->status == kXR_status )
{
ServerResponseStatus *rspst = (ServerResponseStatus*)msg.GetBuffer();
if( rspst->bdy.resptype == XrdProto::kXR_PartialResult )
return true;
}
return false;
}
//----------------------------------------------------------------------------
// Call back when a message has been reconstructed
//----------------------------------------------------------------------------
void Stream::OnIncoming( uint16_t subStream,
std::shared_ptr<Message> msg,
uint32_t bytesReceived )
{
msg->SetSessionId( pSessionId );
pBytesReceived += bytesReceived;
MsgHandler *handler = nullptr;
uint16_t action = 0;
{
InMessageHelper &mh = pSubStreams[subStream]->inMsgHelper;
handler = mh.handler;
action = mh.action;
mh.Reset();
}
if( !IsPartial( *msg ) )
{
uint32_t streamAction = pTransport->MessageReceived( *msg, subStream,
*pChannelData );
if( streamAction & TransportHandler::DigestMsg )
return;
if( streamAction & TransportHandler::RequestClose )
{
RequestClose( *msg );
return;
}
}
Log *log = DefaultEnv::GetLog();
//--------------------------------------------------------------------------
// No handler, we discard the message ...
//--------------------------------------------------------------------------
if( !handler )
{
ServerResponse *rsp = (ServerResponse*)msg->GetBuffer();
log->Warning( PostMasterMsg, "[%s] Discarding received message: 0x%x "
"(status=%d, SID=[%d,%d]), no MsgHandler found.",
pStreamName.c_str(), msg.get(), rsp->hdr.status,
rsp->hdr.streamid[0], rsp->hdr.streamid[1] );
return;
}
//--------------------------------------------------------------------------
// We have a handler, so we call the callback
//--------------------------------------------------------------------------
log->Dump( PostMasterMsg, "[%s] Handling received message: 0x%x.",
pStreamName.c_str(), msg.get() );
if( action & (MsgHandler::NoProcess|MsgHandler::Ignore) )
{
log->Dump( PostMasterMsg, "[%s] Ignoring the processing handler for: 0x%x.",
pStreamName.c_str(), msg->GetDescription().c_str() );
// if we are handling partial response we have to take down the timeout fence
if( IsPartial( *msg ) )
{
XRootDMsgHandler *xrdHandler = dynamic_cast<XRootDMsgHandler*>( handler );
if( xrdHandler ) xrdHandler->PartialReceived();
}
return;
}
Job *job = new HandleIncMsgJob( handler );
pJobManager->QueueJob( job );
}
//----------------------------------------------------------------------------
// Call when one of the sockets is ready to accept a new message
//----------------------------------------------------------------------------
std::pair<Message *, MsgHandler *>
Stream::OnReadyToWrite( uint16_t subStream )
{
XrdSysMutexHelper scopedLock( pMutex );
Log *log = DefaultEnv::GetLog();
if( pSubStreams[subStream]->outQueue->IsEmpty() )
{
log->Dump( PostMasterMsg, "[%s] Nothing to write, disable uplink",
pSubStreams[subStream]->socket->GetStreamName().c_str() );
pSubStreams[subStream]->socket->DisableUplink();
return std::make_pair( (Message *)0, (MsgHandler *)0 );
}
OutQueue::MsgHelper &h = pSubStreams[subStream]->outMsgHelper;
h.msg = pSubStreams[subStream]->outQueue->PopMessage( h.handler,
h.expires,
h.stateful );
scopedLock.UnLock();
if( h.handler )
h.handler->OnReadyToSend( h.msg );
return std::make_pair( h.msg, h.handler );
}
void Stream::DisableIfEmpty( uint16_t subStream )
{
XrdSysMutexHelper scopedLock( pMutex );
Log *log = DefaultEnv::GetLog();
if( pSubStreams[subStream]->outQueue->IsEmpty() )
{
log->Dump( PostMasterMsg, "[%s] All messages consumed, disable uplink",
pSubStreams[subStream]->socket->GetStreamName().c_str() );
pSubStreams[subStream]->socket->DisableUplink();
}
}
//----------------------------------------------------------------------------
// Call when a message is written to the socket
//----------------------------------------------------------------------------
void Stream::OnMessageSent( uint16_t subStream,
Message *msg,
uint32_t bytesSent )
{
pTransport->MessageSent( msg, subStream, bytesSent,
*pChannelData );
OutQueue::MsgHelper &h = pSubStreams[subStream]->outMsgHelper;
pBytesSent += bytesSent;
if( h.handler )
{
h.handler->OnStatusReady( msg, XRootDStatus() );
bool rmMsg = false;
pIncomingQueue->AddMessageHandler( h.handler, h.handler->GetExpiration(), rmMsg );
if( rmMsg )
{
Log *log = DefaultEnv::GetLog();
log->Warning( PostMasterMsg, "[%s] Removed a leftover msg from the in-queue.",
pStreamName.c_str(), subStream );
}
}
pSubStreams[subStream]->outMsgHelper.Reset();
}
//----------------------------------------------------------------------------
// Call back when a message has been reconstructed
//----------------------------------------------------------------------------
void Stream::OnConnect( uint16_t subStream )
{
XrdSysMutexHelper scopedLock( pMutex );
pSubStreams[subStream]->status = Socket::Connected;
std::string ipstack( pSubStreams[0]->socket->GetIpStack() );
Log *log = DefaultEnv::GetLog();
log->Debug( PostMasterMsg, "[%s] Stream %d connected (%s).", pStreamName.c_str(),
subStream, ipstack.c_str() );
if( subStream == 0 )
{
pLastStreamError = 0;
pLastFatalError = XRootDStatus();
pConnectionCount = 0;
uint16_t numSub = pTransport->SubStreamNumber( *pChannelData );
pSessionId = ++sSessCntGen;
//------------------------------------------------------------------------
// Create the streams if they don't exist yet
//------------------------------------------------------------------------
if( pSubStreams.size() == 1 && numSub > 1 )
{
for( uint16_t i = 1; i < numSub; ++i )
{
URL url = pTransport->GetBindPreference( *pUrl, *pChannelData );
AsyncSocketHandler *s = new AsyncSocketHandler( url, pPoller, pTransport,
pChannelData, i, this );
pSubStreams.push_back( new SubStreamData() );
pSubStreams[i]->socket = s;
}
}
//------------------------------------------------------------------------
// Connect the extra streams, if we fail we move all the outgoing items
// to stream 0, we don't need to enable the uplink here, because it
// should be already enabled after the handshaking process is completed.
//------------------------------------------------------------------------
if( pSubStreams.size() > 1 )
{
log->Debug( PostMasterMsg, "[%s] Attempting to connect %d additional "
"streams.", pStreamName.c_str(), pSubStreams.size()-1 );
for( size_t i = 1; i < pSubStreams.size(); ++i )
{
pSubStreams[i]->socket->SetAddress( pSubStreams[0]->socket->GetAddress() );
XRootDStatus st = pSubStreams[i]->socket->Connect( pConnectionWindow );
if( !st.IsOK() )
{
pSubStreams[0]->outQueue->GrabItems( *pSubStreams[i]->outQueue );
pSubStreams[i]->socket->Close();
}
else
{
pSubStreams[i]->status = Socket::Connecting;
}
}
}
//------------------------------------------------------------------------
// Inform monitoring
//------------------------------------------------------------------------
pBytesSent = 0;
pBytesReceived = 0;
gettimeofday( &pConnectionDone, 0 );
Monitor *mon = DefaultEnv::GetMonitor();
if( mon )
{
Monitor::ConnectInfo i;
i.server = pUrl->GetHostId();
i.sTOD = pConnectionStarted;
i.eTOD = pConnectionDone;
i.streams = pSubStreams.size();
AnyObject qryResult;
std::string *qryResponse = 0;
pTransport->Query( TransportQuery::Auth, qryResult, *pChannelData );
qryResult.Get( qryResponse );
i.auth = *qryResponse;
delete qryResponse;
mon->Event( Monitor::EvConnect, &i );
}
//------------------------------------------------------------------------
// For every connected control-stream call the global on-connect handler
//------------------------------------------------------------------------
XrdCl::DefaultEnv::GetPostMaster()->NotifyConnectHandler( *pUrl );
}
else if( pOnDataConnJob )
{
//------------------------------------------------------------------------
// For every connected data-stream call the on-connect handler
//------------------------------------------------------------------------
pJobManager->QueueJob( pOnDataConnJob.get(), 0 );
}
}
//----------------------------------------------------------------------------
// On connect error
//----------------------------------------------------------------------------
void Stream::OnConnectError( uint16_t subStream, XRootDStatus status )
{
XrdSysMutexHelper scopedLock( pMutex );
Log *log = DefaultEnv::GetLog();
pSubStreams[subStream]->socket->Close();
time_t now = ::time(0);
//--------------------------------------------------------------------------
// For every connection error call the global connection error handler
//--------------------------------------------------------------------------
XrdCl::DefaultEnv::GetPostMaster()->NotifyConnErrHandler( *pUrl, status );
//--------------------------------------------------------------------------
// If we connected subStream == 0 and cannot connect >0 then we just give
// up and move the outgoing messages to another queue
//--------------------------------------------------------------------------
if( subStream > 0 )
{
pSubStreams[subStream]->status = Socket::Disconnected;
pSubStreams[0]->outQueue->GrabItems( *pSubStreams[subStream]->outQueue );
if( pSubStreams[0]->status == Socket::Connected )
{
XRootDStatus st = pSubStreams[0]->socket->EnableUplink();
if( !st.IsOK() )
OnFatalError( 0, st, scopedLock );
return;
}
if( pSubStreams[0]->status == Socket::Connecting )
return;
OnFatalError( subStream, status, scopedLock );
return;
}
//--------------------------------------------------------------------------
// Check if we still have time to try and do something in the current window
//--------------------------------------------------------------------------
time_t elapsed = now-pConnectionInitTime;
log->Error( PostMasterMsg, "[%s] elapsed = %d, pConnectionWindow = %d "
"seconds.", pStreamName.c_str(), elapsed, pConnectionWindow );
//------------------------------------------------------------------------
// If we have some IP addresses left we try them
//------------------------------------------------------------------------
if( !pAddresses.empty() )
{
XRootDStatus st;
do
{
pSubStreams[0]->socket->SetAddress( pAddresses.back() );
pAddresses.pop_back();
pConnectionInitTime = ::time( 0 );
st = pSubStreams[0]->socket->Connect( pConnectionWindow );
}
while( !pAddresses.empty() && !st.IsOK() );
if( !st.IsOK() )
OnFatalError( subStream, st, scopedLock );
return;
}
//------------------------------------------------------------------------
// If we still can retry with the same host name, we sleep until the end
// of the connection window and try
//------------------------------------------------------------------------
else if( elapsed < pConnectionWindow && pConnectionCount < pConnectionRetry
&& !status.IsFatal() )
{
log->Info( PostMasterMsg, "[%s] Attempting reconnection in %d "
"seconds.", pStreamName.c_str(), pConnectionWindow-elapsed );
Task *task = new ::StreamConnectorTask( *pUrl, pStreamName );
pTaskManager->RegisterTask( task, pConnectionInitTime+pConnectionWindow );
return;
}
//--------------------------------------------------------------------------
// We are out of the connection window, the only thing we can do here
// is re-resolving the host name and retrying if we still can
//--------------------------------------------------------------------------
else if( pConnectionCount < pConnectionRetry && !status.IsFatal() )
{
pAddresses.clear();
pSubStreams[0]->status = Socket::Disconnected;
PathID path( 0, 0 );
XRootDStatus st = EnableLink( path );
if( !st.IsOK() )
OnFatalError( subStream, st, scopedLock );
return;
}
//--------------------------------------------------------------------------
// Else, we fail
//--------------------------------------------------------------------------
OnFatalError( subStream, status, scopedLock );
}
//----------------------------------------------------------------------------
// Call back when an error has occurred
//----------------------------------------------------------------------------
void Stream::OnError( uint16_t subStream, XRootDStatus status )
{
XrdSysMutexHelper scopedLock( pMutex );
Log *log = DefaultEnv::GetLog();
pSubStreams[subStream]->socket->Close();
pSubStreams[subStream]->status = Socket::Disconnected;
log->Debug( PostMasterMsg, "[%s] Recovering error for stream #%d: %s.",
pStreamName.c_str(), subStream, status.ToString().c_str() );
//--------------------------------------------------------------------------
// Reinsert the stuff that we have failed to sent
//--------------------------------------------------------------------------
if( pSubStreams[subStream]->outMsgHelper.msg )
{
OutQueue::MsgHelper &h = pSubStreams[subStream]->outMsgHelper;
pSubStreams[subStream]->outQueue->PushFront( h.msg, h.handler, h.expires,
h.stateful );
pSubStreams[subStream]->outMsgHelper.Reset();
}
//--------------------------------------------------------------------------
// Reinsert the receiving handler and reset any partially read partial
//--------------------------------------------------------------------------
if( pSubStreams[subStream]->inMsgHelper.handler )
{
InMessageHelper &h = pSubStreams[subStream]->inMsgHelper;
pIncomingQueue->ReAddMessageHandler( h.handler, h.expires );
XRootDMsgHandler *xrdHandler = dynamic_cast<XRootDMsgHandler*>( h.handler );
if( xrdHandler ) xrdHandler->PartialReceived();
h.Reset();
}
//--------------------------------------------------------------------------
// We are dealing with an error of a peripheral stream. If we don't have
// anything to send don't bother recovering. Otherwise move the requests
// to stream 0 if possible.
//--------------------------------------------------------------------------
if( subStream > 0 )
{
if( pSubStreams[subStream]->outQueue->IsEmpty() )
return;
if( pSubStreams[0]->status != Socket::Disconnected )
{
pSubStreams[0]->outQueue->GrabItems( *pSubStreams[subStream]->outQueue );
if( pSubStreams[0]->status == Socket::Connected )
{
XRootDStatus st = pSubStreams[0]->socket->EnableUplink();
if( !st.IsOK() )
OnFatalError( 0, st, scopedLock );
return;
}
}
OnFatalError( subStream, status, scopedLock );
return;
}
//--------------------------------------------------------------------------
// If we lost the stream 0 we have lost the session, we re-enable the
// stream if we still have things in one of the outgoing queues, otherwise
// there is not point to recover at this point.
//--------------------------------------------------------------------------
if( subStream == 0 )
{
MonitorDisconnection( status );
SubStreamList::iterator it;
size_t outstanding = 0;
for( it = pSubStreams.begin(); it != pSubStreams.end(); ++it )
outstanding += (*it)->outQueue->GetSizeStateless();
if( outstanding )
{
PathID path( 0, 0 );
XRootDStatus st = EnableLink( path );
if( !st.IsOK() )
{
OnFatalError( 0, st, scopedLock );
return;
}
}
//------------------------------------------------------------------------
// We're done here, unlock the stream mutex to avoid deadlocks and
// report the disconnection event to the handlers
//------------------------------------------------------------------------
log->Debug( PostMasterMsg, "[%s] Reporting disconnection to queued "
"message handlers.", pStreamName.c_str() );
OutQueue q;
for( it = pSubStreams.begin(); it != pSubStreams.end(); ++it )
q.GrabStateful( *(*it)->outQueue );
scopedLock.UnLock();
q.Report( status );
pIncomingQueue->ReportStreamEvent( MsgHandler::Broken, status );
pChannelEvHandlers.ReportEvent( ChannelEventHandler::StreamBroken, status );
return;
}
}
//------------------------------------------------------------------------
// Force error
//------------------------------------------------------------------------
void Stream::ForceError( XRootDStatus status )
{
XrdSysMutexHelper scopedLock( pMutex );
Log *log = DefaultEnv::GetLog();
for( size_t substream = 0; substream < pSubStreams.size(); ++substream )
{
if( pSubStreams[substream]->status != Socket::Connected ) continue;
pSubStreams[substream]->socket->Close();
pSubStreams[substream]->status = Socket::Disconnected;
log->Error( PostMasterMsg, "[%s] Forcing error on disconnect: %s.",
pStreamName.c_str(), status.ToString().c_str() );
//--------------------------------------------------------------------
// Reinsert the stuff that we have failed to sent
//--------------------------------------------------------------------
if( pSubStreams[substream]->outMsgHelper.msg )
{
OutQueue::MsgHelper &h = pSubStreams[substream]->outMsgHelper;
pSubStreams[substream]->outQueue->PushFront( h.msg, h.handler, h.expires,
h.stateful );
pSubStreams[substream]->outMsgHelper.Reset();
}
//--------------------------------------------------------------------
// Reinsert the receiving handler and reset any partially read partial
//--------------------------------------------------------------------
if( pSubStreams[substream]->inMsgHelper.handler )
{
InMessageHelper &h = pSubStreams[substream]->inMsgHelper;
pIncomingQueue->ReAddMessageHandler( h.handler, h.expires );
XRootDMsgHandler *xrdHandler = dynamic_cast<XRootDMsgHandler*>( h.handler );
if( xrdHandler ) xrdHandler->PartialReceived();
h.Reset();
}
}
pConnectionCount = 0;
//------------------------------------------------------------------------
// We're done here, unlock the stream mutex to avoid deadlocks and
// report the disconnection event to the handlers
//------------------------------------------------------------------------
log->Debug( PostMasterMsg, "[%s] Reporting disconnection to queued "
"message handlers.", pStreamName.c_str() );
SubStreamList::iterator it;
OutQueue q;
for( it = pSubStreams.begin(); it != pSubStreams.end(); ++it )
q.GrabItems( *(*it)->outQueue );
scopedLock.UnLock();
q.Report( status );
pIncomingQueue->ReportStreamEvent( MsgHandler::Broken, status );
pChannelEvHandlers.ReportEvent( ChannelEventHandler::StreamBroken, status );
}
//----------------------------------------------------------------------------
// On fatal error
//----------------------------------------------------------------------------
void Stream::OnFatalError( uint16_t subStream,
XRootDStatus status,
XrdSysMutexHelper &lock )
{
Log *log = DefaultEnv::GetLog();
pSubStreams[subStream]->status = Socket::Disconnected;
log->Error( PostMasterMsg, "[%s] Unable to recover: %s.",
pStreamName.c_str(), status.ToString().c_str() );
//--------------------------------------------------------------------------
// Don't set the stream error windows for authentication errors as the user
// may refresh his credential at any time
//--------------------------------------------------------------------------
if( status.code != errAuthFailed )
{
pConnectionCount = 0;
pLastStreamError = ::time(0);
pLastFatalError = status;
}
SubStreamList::iterator it;
OutQueue q;
for( it = pSubStreams.begin(); it != pSubStreams.end(); ++it )
q.GrabItems( *(*it)->outQueue );
lock.UnLock();
status.status = stFatal;
q.Report( status );