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XrdClFileStateHandler.cc
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XrdClFileStateHandler.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/XrdClFileStateHandler.hh"
#include "XrdCl/XrdClURL.hh"
#include "XrdCl/XrdClLog.hh"
#include "XrdCl/XrdClStatus.hh"
#include "XrdCl/XrdClDefaultEnv.hh"
#include "XrdCl/XrdClForkHandler.hh"
#include "XrdCl/XrdClConstants.hh"
#include "XrdCl/XrdClMessageUtils.hh"
#include "XrdCl/XrdClXRootDTransport.hh"
#include "XrdCl/XrdClXRootDResponses.hh"
#include "XrdCl/XrdClMonitor.hh"
#include "XrdCl/XrdClFileTimer.hh"
#include "XrdCl/XrdClResponseJob.hh"
#include "XrdCl/XrdClJobManager.hh"
#include "XrdCl/XrdClRedirectorRegistry.hh"
#include "XrdCl/XrdClAnyObject.hh"
#ifdef WITH_XRDEC
#include "XrdCl/XrdClEcHandler.hh"
#endif
#include "XrdOuc/XrdOucCRC.hh"
#include "XrdOuc/XrdOucPgrwUtils.hh"
#include "XrdSys/XrdSysKernelBuffer.hh"
#include "XrdSys/XrdSysPageSize.hh"
#include "XrdSys/XrdSysPthread.hh"
#include <sstream>
#include <memory>
#include <numeric>
#include <sys/time.h>
#include <uuid/uuid.h>
#include <mutex>
namespace
{
//----------------------------------------------------------------------------
// Helper callback for handling PgRead responses
//----------------------------------------------------------------------------
class PgReadHandler : public XrdCl::ResponseHandler
{
friend class PgReadRetryHandler;
public:
//------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------
PgReadHandler( XrdCl::FileStateHandler *stateHandler,
XrdCl::ResponseHandler *userHandler,
uint64_t orgOffset ) : stateHandler( stateHandler ),
userHandler( userHandler ),
orgOffset( orgOffset ),
maincall( true ),
retrycnt( 0 ),
nbrepair( 0 )
{
}
//------------------------------------------------------------------------
// Handle the response
//------------------------------------------------------------------------
void HandleResponseWithHosts( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *response,
XrdCl::HostList *hostList )
{
using namespace XrdCl;
std::unique_lock<std::mutex> lck( mtx );
if( !maincall )
{
//--------------------------------------------------------------------
// We are serving PgRead retry request
//--------------------------------------------------------------------
--retrycnt;
if( !status->IsOK() )
st.reset( status );
else
{
delete status; // by convention other args are null (see PgReadRetryHandler)
++nbrepair; // update number of repaired pages
}
if( retrycnt == 0 )
{
//------------------------------------------------------------------
// All retries came back
//------------------------------------------------------------------
if( st->IsOK() )
{
PageInfo &pginf = XrdCl::To<PageInfo>( *resp );
pginf.SetNbRepair( nbrepair );
userHandler->HandleResponseWithHosts( st.release(), resp.release(), hosts.release() );
}
else
userHandler->HandleResponseWithHosts( st.release(), 0, 0 );
lck.unlock();
delete this;
}
return;
}
//----------------------------------------------------------------------
// We are serving main PgRead request
//----------------------------------------------------------------------
if( !status->IsOK() )
{
//--------------------------------------------------------------------
// The main PgRead request has failed
//--------------------------------------------------------------------
userHandler->HandleResponseWithHosts( status, response, hostList );
lck.unlock();
delete this;
return;
}
maincall = false;
//----------------------------------------------------------------------
// Do the integrity check
//----------------------------------------------------------------------
PageInfo *pginf = 0;
response->Get( pginf );
uint64_t pgoff = pginf->GetOffset();
uint32_t bytesRead = pginf->GetLength();
std::vector<uint32_t> &cksums = pginf->GetCksums();
char *buffer = reinterpret_cast<char*>( pginf->GetBuffer() );
size_t nbpages = XrdOucPgrwUtils::csNum( pgoff, bytesRead );
uint32_t pgsize = XrdSys::PageSize - pgoff % XrdSys::PageSize;
if( pgsize > bytesRead ) pgsize = bytesRead;
for( size_t pgnb = 0; pgnb < nbpages; ++pgnb )
{
uint32_t crcval = XrdOucCRC::Calc32C( buffer, pgsize );
if( crcval != cksums[pgnb] )
{
Log *log = DefaultEnv::GetLog();
log->Info( FileMsg, "[0x%x@%s] Received corrupted page, will retry page #%d.",
this, stateHandler->pFileUrl->GetURL().c_str(), pgnb );
XRootDStatus st = stateHandler->PgReadRetry( pgoff, pgsize, pgnb, buffer, this, 0 );
if( !st.IsOK())
{
*status = st; // the reason for this failure
break;
}
++retrycnt; // update the retry counter
}
bytesRead -= pgsize;
buffer += pgsize;
pgoff += pgsize;
pgsize = XrdSys::PageSize;
if( pgsize > bytesRead ) pgsize = bytesRead;
}
if( retrycnt == 0 )
{
//--------------------------------------------------------------------
// All went well!
//--------------------------------------------------------------------
userHandler->HandleResponseWithHosts( status, response, hostList );
lck.unlock();
delete this;
return;
}
//----------------------------------------------------------------------
// We have to wait for retries!
//----------------------------------------------------------------------
resp.reset( response );
hosts.reset( hostList );
st.reset( status );
}
void UpdateCksum( size_t pgnb, uint32_t crcval )
{
if( resp )
{
XrdCl::PageInfo *pginf = 0;
resp->Get( pginf );
pginf->GetCksums()[pgnb] = crcval;
}
}
private:
XrdCl::FileStateHandler *stateHandler;
XrdCl::ResponseHandler *userHandler;
uint64_t orgOffset;
std::unique_ptr<XrdCl::AnyObject> resp;
std::unique_ptr<XrdCl::HostList> hosts;
std::unique_ptr<XrdCl::XRootDStatus> st;
std::mutex mtx;
bool maincall;
size_t retrycnt;
size_t nbrepair;
};
//----------------------------------------------------------------------------
// Helper callback for handling PgRead retries
//----------------------------------------------------------------------------
class PgReadRetryHandler : public XrdCl::ResponseHandler
{
public:
PgReadRetryHandler( PgReadHandler *pgReadHandler, size_t pgnb ) : pgReadHandler( pgReadHandler ),
pgnb( pgnb )
{
}
//------------------------------------------------------------------------
// Handle the response
//------------------------------------------------------------------------
void HandleResponseWithHosts( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *response,
XrdCl::HostList *hostList )
{
using namespace XrdCl;
if( !status->IsOK() )
{
Log *log = DefaultEnv::GetLog();
log->Info( FileMsg, "[0x%x@%s] Failed to recover page #%d.",
this, pgReadHandler->stateHandler->pFileUrl->GetURL().c_str(), pgnb );
pgReadHandler->HandleResponseWithHosts( status, response, hostList );
delete this;
return;
}
XrdCl::PageInfo *pginf = 0;
response->Get( pginf );
if( pginf->GetLength() > (uint32_t)XrdSys::PageSize || pginf->GetCksums().size() != 1 )
{
Log *log = DefaultEnv::GetLog();
log->Info( FileMsg, "[0x%x@%s] Failed to recover page #%d.",
this, pgReadHandler->stateHandler->pFileUrl->GetURL().c_str(), pgnb );
// we retry a page at a time so the length cannot exceed 4KB
DeleteArgs( status, response, hostList );
pgReadHandler->HandleResponseWithHosts( new XRootDStatus( stError, errDataError ), 0, 0 );
delete this;
return;
}
uint32_t crcval = XrdOucCRC::Calc32C( pginf->GetBuffer(), pginf->GetLength() );
if( crcval != pginf->GetCksums().front() )
{
Log *log = DefaultEnv::GetLog();
log->Info( FileMsg, "[0x%x@%s] Failed to recover page #%d.",
this, pgReadHandler->stateHandler->pFileUrl->GetURL().c_str(), pgnb );
DeleteArgs( status, response, hostList );
pgReadHandler->HandleResponseWithHosts( new XRootDStatus( stError, errDataError ), 0, 0 );
delete this;
return;
}
Log *log = DefaultEnv::GetLog();
log->Info( FileMsg, "[0x%x@%s] Successfully recovered page #%d.",
this, pgReadHandler->stateHandler->pFileUrl->GetURL().c_str(), pgnb );
DeleteArgs( 0, response, hostList );
pgReadHandler->UpdateCksum( pgnb, crcval );
pgReadHandler->HandleResponseWithHosts( status, 0, 0 );
delete this;
}
private:
inline void DeleteArgs( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *response,
XrdCl::HostList *hostList )
{
delete status;
delete response;
delete hostList;
}
PgReadHandler *pgReadHandler;
size_t pgnb;
};
//----------------------------------------------------------------------------
// Handle PgRead substitution with ordinary Read
//----------------------------------------------------------------------------
class PgReadSubstitutionHandler : public XrdCl::ResponseHandler
{
public:
//------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------
PgReadSubstitutionHandler( XrdCl::FileStateHandler *stateHandler,
XrdCl::ResponseHandler *userHandler ) : stateHandler( stateHandler ),
userHandler( userHandler )
{
}
//------------------------------------------------------------------------
// Handle the response
//------------------------------------------------------------------------
void HandleResponseWithHosts( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *rdresp,
XrdCl::HostList *hostList )
{
if( !status->IsOK() )
{
userHandler->HandleResponseWithHosts( status, rdresp, hostList );
delete this;
return;
}
using namespace XrdCl;
ChunkInfo *chunk = 0;
rdresp->Get( chunk );
std::vector<uint32_t> cksums;
if( stateHandler->pIsChannelEncrypted )
{
size_t nbpages = chunk->length / XrdSys::PageSize;
if( chunk->length % XrdSys::PageSize )
++nbpages;
cksums.reserve( nbpages );
size_t size = chunk->length;
char *buffer = reinterpret_cast<char*>( chunk->buffer );
for( size_t pg = 0; pg < nbpages; ++pg )
{
size_t pgsize = XrdSys::PageSize;
if( pgsize > size ) pgsize = size;
uint32_t crcval = XrdOucCRC::Calc32C( buffer, pgsize );
cksums.push_back( crcval );
buffer += pgsize;
size -= pgsize;
}
}
PageInfo *pages = new PageInfo( chunk->offset, chunk->length,
chunk->buffer, std::move( cksums ) );
delete rdresp;
AnyObject *response = new AnyObject();
response->Set( pages );
userHandler->HandleResponseWithHosts( status, response, hostList );
delete this;
}
private:
XrdCl::FileStateHandler *stateHandler;
XrdCl::ResponseHandler *userHandler;
};
//----------------------------------------------------------------------------
// Object that does things to the FileStateHandler when kXR_open returns
// and then calls the user handler
//----------------------------------------------------------------------------
class OpenHandler: public XrdCl::ResponseHandler
{
public:
//------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------
OpenHandler( XrdCl::FileStateHandler *stateHandler,
XrdCl::ResponseHandler *userHandler ):
pStateHandler( stateHandler ),
pUserHandler( userHandler )
{
}
//------------------------------------------------------------------------
// Handle the response
//------------------------------------------------------------------------
virtual void HandleResponseWithHosts( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *response,
XrdCl::HostList *hostList )
{
using namespace XrdCl;
//----------------------------------------------------------------------
// Extract the statistics info
//----------------------------------------------------------------------
OpenInfo *openInfo = 0;
if( status->IsOK() )
response->Get( openInfo );
#ifdef WITH_XRDEC
else
//--------------------------------------------------------------------
// Handle EC redirect
//--------------------------------------------------------------------
if( status->code == errRedirect )
{
std::string ecurl = status->GetErrorMessage();
EcHandler *ecHandler = GetEcHandler( hostList->front().url, ecurl );
if( ecHandler )
{
pStateHandler->pPlugin = ecHandler; // set the plugin for the File object
ecHandler->Open( pStateHandler->pOpenFlags, pUserHandler, 0/*TODO figure out right value for the timeout*/ );
return;
}
}
#endif
//----------------------------------------------------------------------
// Notify the state handler and the client and say bye bye
//----------------------------------------------------------------------
pStateHandler->OnOpen( status, openInfo, hostList );
delete response;
if( pUserHandler )
pUserHandler->HandleResponseWithHosts( status, 0, hostList );
else
{
delete status;
delete hostList;
}
delete this;
}
private:
XrdCl::FileStateHandler *pStateHandler;
XrdCl::ResponseHandler *pUserHandler;
};
//----------------------------------------------------------------------------
// Object that does things to the FileStateHandler when kXR_close returns
// and then calls the user handler
//----------------------------------------------------------------------------
class CloseHandler: public XrdCl::ResponseHandler
{
public:
//------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------
CloseHandler( XrdCl::FileStateHandler *stateHandler,
XrdCl::ResponseHandler *userHandler,
XrdCl::Message *message ):
pStateHandler( stateHandler ),
pUserHandler( userHandler ),
pMessage( message )
{
}
//------------------------------------------------------------------------
//! Destructor
//------------------------------------------------------------------------
virtual ~CloseHandler()
{
delete pMessage;
}
//------------------------------------------------------------------------
// Handle the response
//------------------------------------------------------------------------
virtual void HandleResponseWithHosts( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *response,
XrdCl::HostList *hostList )
{
pStateHandler->OnClose( status );
if( pUserHandler )
pUserHandler->HandleResponseWithHosts( status, response, hostList );
else
{
delete response;
delete status;
delete hostList;
}
delete this;
}
private:
XrdCl::FileStateHandler *pStateHandler;
XrdCl::ResponseHandler *pUserHandler;
XrdCl::Message *pMessage;
};
//----------------------------------------------------------------------------
// Stateful message handler
//----------------------------------------------------------------------------
class StatefulHandler: public XrdCl::ResponseHandler
{
public:
//------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------
StatefulHandler( XrdCl::FileStateHandler *stateHandler,
XrdCl::ResponseHandler *userHandler,
XrdCl::Message *message,
const XrdCl::MessageSendParams &sendParams ):
pStateHandler( stateHandler ),
pUserHandler( userHandler ),
pMessage( message ),
pSendParams( sendParams )
{
}
//------------------------------------------------------------------------
// Destructor
//------------------------------------------------------------------------
virtual ~StatefulHandler()
{
delete pMessage;
delete pSendParams.chunkList;
delete pSendParams.kbuff;
}
//------------------------------------------------------------------------
// Handle the response
//------------------------------------------------------------------------
virtual void HandleResponseWithHosts( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *response,
XrdCl::HostList *hostList )
{
using namespace XrdCl;
std::unique_ptr<AnyObject> responsePtr( response );
pSendParams.hostList = hostList;
//----------------------------------------------------------------------
// Houston we have a problem...
//----------------------------------------------------------------------
if( !status->IsOK() )
{
pStateHandler->OnStateError( status, pMessage, this, pSendParams );
return;
}
//----------------------------------------------------------------------
// We're clear
//----------------------------------------------------------------------
responsePtr.release();
pStateHandler->OnStateResponse( status, pMessage, response, hostList );
if( pUserHandler )
pUserHandler->HandleResponseWithHosts( status, response, hostList );
else
{
delete status,
delete response;
delete hostList;
}
delete this;
}
//------------------------------------------------------------------------
//! Get the user handler
//------------------------------------------------------------------------
XrdCl::ResponseHandler *GetUserHandler()
{
return pUserHandler;
}
private:
XrdCl::FileStateHandler *pStateHandler;
XrdCl::ResponseHandler *pUserHandler;
XrdCl::Message *pMessage;
XrdCl::MessageSendParams pSendParams;
};
//----------------------------------------------------------------------------
// Release-buffer Handler
//----------------------------------------------------------------------------
class ReleaseBufferHandler: public XrdCl::ResponseHandler
{
public:
//------------------------------------------------------------------------
// Constructor
//------------------------------------------------------------------------
ReleaseBufferHandler( XrdCl::Buffer &&buffer, XrdCl::ResponseHandler *handler ) :
buffer( std::move( buffer ) ),
handler( handler )
{
}
//------------------------------------------------------------------------
// Handle the response
//------------------------------------------------------------------------
virtual void HandleResponseWithHosts( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *response,
XrdCl::HostList *hostList )
{
handler->HandleResponseWithHosts( status, response, hostList );
}
//------------------------------------------------------------------------
// Get the underlying buffer
//------------------------------------------------------------------------
XrdCl::Buffer& GetBuffer()
{
return buffer;
}
private:
XrdCl::Buffer buffer;
XrdCl::ResponseHandler *handler;
};
}
namespace XrdCl
{
//------------------------------------------------------------------------
//! Holds a reference to a ResponceHandler
//! and allows to safely delete it
//------------------------------------------------------------------------
class ResponseHandlerHolder : public ResponseHandler
{
public:
//------------------------------------------------------------------------
//! Constructor
//------------------------------------------------------------------------
ResponseHandlerHolder( ResponseHandler * handler ) : pHandler( handler ), pReferenceCounter( 1 ) {}
//------------------------------------------------------------------------
//! Destructor is private - use 'Destroy' in order to delete the object
//! Always destroys the actual ResponseHandler and deletes itself only
//! if this is the last reference
//------------------------------------------------------------------------
void Destroy()
{
XrdSysMutexHelper scopedLock( pMutex );
// delete the actual handler
if( pHandler )
{
delete pHandler;
pHandler = 0;
}
// and than destroy myself if this is the last reference
DestroyMyself( scopedLock );
}
//------------------------------------------------------------------------
//! Increment reference counter
//------------------------------------------------------------------------
ResponseHandlerHolder* Self()
{
XrdSysMutexHelper scopedLock( pMutex );
++pReferenceCounter;
return this;
}
//------------------------------------------------------------------------
// Handle the response
//------------------------------------------------------------------------
virtual void HandleResponseWithHosts( XrdCl::XRootDStatus *status,
XrdCl::AnyObject *response,
XrdCl::HostList *hostList )
{
XrdSysMutexHelper scopedLock( pMutex );
// delegate the job to the actual handler
if( pHandler )
{
pHandler->HandleResponseWithHosts( status, response, hostList );
// after handling a response the handler destroys itself,
// so we need to nullify the pointer
pHandler = 0;
}
else
{
delete status;
delete response;
delete hostList;
}
// destroy the object if it is
DestroyMyself( scopedLock );
}
private:
//------------------------------------------------------------------------
//! Deletes itself only if this is the last reference
//------------------------------------------------------------------------
void DestroyMyself( XrdSysMutexHelper &lck )
{
// decrement the reference counter
--pReferenceCounter;
// if the object is not used anymore delete it
if( pReferenceCounter == 0)
{
lck.UnLock();
delete this;
}
}
//------------------------------------------------------------------------
//! Private Destructor (use 'Destroy' method)
//------------------------------------------------------------------------
~ResponseHandlerHolder() {}
//------------------------------------------------------------------------
// The actual handler
//------------------------------------------------------------------------
ResponseHandler* pHandler;
//------------------------------------------------------------------------
// Reference counter
//------------------------------------------------------------------------
size_t pReferenceCounter;
//------------------------------------------------------------------------
// and respective mutex
//------------------------------------------------------------------------
mutable XrdSysRecMutex pMutex;
};
//----------------------------------------------------------------------------
// Constructor
//----------------------------------------------------------------------------
FileStateHandler::FileStateHandler( FilePlugIn *& plugin ):
pFileState( Closed ),
pStatInfo( 0 ),
pFileUrl( 0 ),
pDataServer( 0 ),
pLoadBalancer( 0 ),
pStateRedirect( 0 ),
pWrtRecoveryRedir( 0 ),
pFileHandle( 0 ),
pOpenMode( 0 ),
pOpenFlags( 0 ),
pSessionId( 0 ),
pDoRecoverRead( true ),
pDoRecoverWrite( true ),
pFollowRedirects( true ),
pUseVirtRedirector( true ),
pIsChannelEncrypted( false ),
pAllowBundledClose( false ),
pReOpenHandler( 0 ),
pPlugin( plugin )
{
pFileHandle = new uint8_t[4];
ResetMonitoringVars();
DefaultEnv::GetForkHandler()->RegisterFileObject( this );
DefaultEnv::GetFileTimer()->RegisterFileObject( this );
pLFileHandler = new LocalFileHandler();
}
//------------------------------------------------------------------------
//! Constructor
//!
//! @param useVirtRedirector if true Metalink files will be treated
//! as a VirtualRedirectors
//------------------------------------------------------------------------
FileStateHandler::FileStateHandler( bool useVirtRedirector, FilePlugIn *& plugin ):
pFileState( Closed ),
pStatInfo( 0 ),
pFileUrl( 0 ),
pDataServer( 0 ),
pLoadBalancer( 0 ),
pStateRedirect( 0 ),
pWrtRecoveryRedir( 0 ),
pFileHandle( 0 ),
pOpenMode( 0 ),
pOpenFlags( 0 ),
pSessionId( 0 ),
pDoRecoverRead( true ),
pDoRecoverWrite( true ),
pFollowRedirects( true ),
pUseVirtRedirector( useVirtRedirector ),
pAllowBundledClose( false ),
pReOpenHandler( 0 ),
pPlugin( plugin )
{
pFileHandle = new uint8_t[4];
ResetMonitoringVars();
DefaultEnv::GetForkHandler()->RegisterFileObject( this );
DefaultEnv::GetFileTimer()->RegisterFileObject( this );
pLFileHandler = new LocalFileHandler();
}
//----------------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------------
FileStateHandler::~FileStateHandler()
{
if( pSessionId ) // if the file object was bound to a physical connection
DefaultEnv::GetPostMaster()->DecFileInstCnt( *pDataServer );
if( pReOpenHandler )
pReOpenHandler->Destroy();
if( DefaultEnv::GetFileTimer() )
DefaultEnv::GetFileTimer()->UnRegisterFileObject( this );
if( DefaultEnv::GetForkHandler() )
DefaultEnv::GetForkHandler()->UnRegisterFileObject( this );
if( pFileState != Closed && DefaultEnv::GetLog() )
{
XRootDStatus st;
MonitorClose( &st );
ResetMonitoringVars();
}
// check if the logger is still there, this is only for root, as root might
// have unload us already so in this case we don't want to do anything
if( DefaultEnv::GetLog() && pUseVirtRedirector && pFileUrl && pFileUrl->IsMetalink() )
{
RedirectorRegistry& registry = RedirectorRegistry::Instance();
registry.Release( *pFileUrl );
}
delete pStatInfo;
delete pFileUrl;
delete pDataServer;
delete pLoadBalancer;
delete [] pFileHandle;
delete pLFileHandler;
}
//----------------------------------------------------------------------------
// Open the file pointed to by the given URL
//----------------------------------------------------------------------------
XRootDStatus FileStateHandler::Open( const std::string &url,
uint16_t flags,
uint16_t mode,
ResponseHandler *handler,
uint16_t timeout )
{
XrdSysMutexHelper scopedLock( pMutex );
//--------------------------------------------------------------------------
// Check if we can proceed
//--------------------------------------------------------------------------
if( pFileState == Error )
return pStatus;
if( pFileState == OpenInProgress )
return XRootDStatus( stError, errInProgress );
if( pFileState == CloseInProgress || pFileState == Opened ||
pFileState == Recovering )
return XRootDStatus( stError, errInvalidOp );
pFileState = OpenInProgress;
//--------------------------------------------------------------------------
// Check if the parameters are valid
//--------------------------------------------------------------------------
Log *log = DefaultEnv::GetLog();
if (pFileUrl)
{
if( pUseVirtRedirector && pFileUrl->IsMetalink() )
{
RedirectorRegistry& registry = RedirectorRegistry::Instance();
registry.Release( *pFileUrl );
}
delete pFileUrl;
pFileUrl = 0;
}
pFileUrl = new URL( url );
//--------------------------------------------------------------------------
// Add unique uuid to each open request so replays due to error/timeout
// recovery can be correctly handled.
//--------------------------------------------------------------------------
URL::ParamsMap cgi = pFileUrl->GetParams();
uuid_t uuid;
char requuid[37]= {0};
uuid_generate( uuid );
uuid_unparse( uuid, requuid );
cgi["xrdcl.requuid"] = requuid;
pFileUrl->SetParams( cgi );
if( !pFileUrl->IsValid() )
{
log->Error( FileMsg, "[0x%x@%s] Trying to open invalid url: %s",
this, pFileUrl->GetPath().c_str(), url.c_str() );
pStatus = XRootDStatus( stError, errInvalidArgs );
pFileState = Closed;
return pStatus;
}
//--------------------------------------------------------------------------
// Check if the recovery procedures should be enabled
//--------------------------------------------------------------------------
const URL::ParamsMap &urlParams = pFileUrl->GetParams();
URL::ParamsMap::const_iterator it;
it = urlParams.find( "xrdcl.recover-reads" );
if( (it != urlParams.end() && it->second == "false") ||
!pDoRecoverRead )
{
pDoRecoverRead = false;
log->Debug( FileMsg, "[0x%x@%s] Read recovery procedures are disabled",
this, pFileUrl->GetURL().c_str() );
}
it = urlParams.find( "xrdcl.recover-writes" );
if( (it != urlParams.end() && it->second == "false") ||
!pDoRecoverWrite )
{
pDoRecoverWrite = false;
log->Debug( FileMsg, "[0x%x@%s] Write recovery procedures are disabled",
this, pFileUrl->GetURL().c_str() );
}
//--------------------------------------------------------------------------
// Open the file
//--------------------------------------------------------------------------
log->Debug( FileMsg, "[0x%x@%s] Sending an open command", this,
pFileUrl->GetURL().c_str() );
pOpenMode = mode;
pOpenFlags = flags;
OpenHandler *openHandler = new OpenHandler( this, handler );
Message *msg;
ClientOpenRequest *req;
std::string path = pFileUrl->GetPathWithFilteredParams();
MessageUtils::CreateRequest( msg, req, path.length() );
req->requestid = kXR_open;
req->mode = mode;
req->options = flags | kXR_async | kXR_retstat;
req->dlen = path.length();
msg->Append( path.c_str(), path.length(), 24 );
XRootDTransport::SetDescription( msg );
MessageSendParams params; params.timeout = timeout;
params.followRedirects = pFollowRedirects;
MessageUtils::ProcessSendParams( params );
XRootDStatus st = IssueRequest( *pFileUrl, msg, openHandler, params );
if( !st.IsOK() )
{
delete openHandler;
pStatus = st;
pFileState = Closed;
return st;
}
return st;
}
//----------------------------------------------------------------------------
// Close the file object
//----------------------------------------------------------------------------
XRootDStatus FileStateHandler::Close( ResponseHandler *handler,
uint16_t timeout )
{
XrdSysMutexHelper scopedLock( pMutex );
//--------------------------------------------------------------------------
// Check if we can proceed
//--------------------------------------------------------------------------
if( pFileState == Error )
return pStatus;
if( pFileState == CloseInProgress )
return XRootDStatus( stError, errInProgress );
if( pFileState == Closed )
return XRootDStatus( stOK, suAlreadyDone );
if( pFileState == OpenInProgress || pFileState == Recovering )
return XRootDStatus( stError, errInvalidOp );
if( !pAllowBundledClose && !pInTheFly.empty() )
return XRootDStatus( stError, errInvalidOp );
pFileState = CloseInProgress;
Log *log = DefaultEnv::GetLog();
log->Debug( FileMsg, "[0x%x@%s] Sending a close command for handle 0x%x to "
"%s", this, pFileUrl->GetURL().c_str(),
*((uint32_t*)pFileHandle), pDataServer->GetHostId().c_str() );
//--------------------------------------------------------------------------
// Close the file
//--------------------------------------------------------------------------
Message *msg;
ClientCloseRequest *req;
MessageUtils::CreateRequest( msg, req );
req->requestid = kXR_close;