XrdPfc::File Class Reference

#include <XrdPfcFile.hh>

Collaboration diagram for XrdPfc::File:

Public Member Functions
void	AddIO (IO *io)
void	BlockRemovedFromWriteQ (Block *)
	Handle removal of a block from Cache's write queue. More...
void	BlocksRemovedFromWriteQ (std::list< Block * > &)
	Handle removal of a set of blocks from Cache's write queue. More...
int	dec_ref_cnt ()
bool	FinalizeSyncBeforeExit ()
	Returns true if any of blocks need sync. Called from Cache::dec_ref_cnt on zero ref cnt. More...
int	Fstat (struct stat &sbuff)
int	get_ref_cnt ()
size_t	GetAccessCnt () const
int	GetBlockSize () const
long long	GetFileSize () const
const Info::AStat *	GetLastAccessStats () const
const std::string &	GetLocalPath () const
XrdSysError *	GetLog () const
int	GetNBlocks () const
int	GetNDownloadedBlocks () const
int	GetPrefetchCountOnIO (IO *io)
long long	GetPrefetchedBytes () const
float	GetPrefetchScore () const
std::string	GetRemoteLocations () const
XrdSysTrace *	GetTrace () const
int	inc_ref_cnt ()
long long	initiate_emergency_shutdown ()
bool	ioActive (IO *io)
	Initiate close. Return true if still IO active. Used in XrdPosixXrootd::Close() More...
void	ioUpdated (IO *io)
	Notification from IO that it has been updated (remote open). More...
bool	is_in_emergency_shutdown ()
const char *	lPath () const
	Log path. More...
void	Prefetch ()
int	Read (IO *io, char *buff, long long offset, int size, ReadReqRH *rh)
	Normal read. More...
int	ReadV (IO *io, const XrdOucIOVec *readV, int readVnum, ReadReqRH *rh)
	Vector read. More...
const Stats &	RefStats () const
void	RemoveIO (IO *io)
void	RequestSyncOfDetachStats ()
	Flags that detach stats should be written out in final sync. Called from CacheIO upon Detach. More...
void	StopPrefetchingOnIO (IO *io)
void	Sync ()
	Sync file cache inf o and output data with disk. More...
void	WriteBlockToDisk (Block *b)

Static Public Member Functions
static File *	FileOpen (const std::string &path, long long offset, long long fileSize, XrdOucCacheIO *inputIO)
	Static constructor that also does Open. Returns null ptr if Open fails. More...

Friends
class	BlockResponseHandler
class	Cache
class	DirectResponseHandler

Detailed Description

Definition at line 202 of file XrdPfcFile.hh.

Member Function Documentation

AddIO()

void File::AddIO

(

IO *

io

)

Definition at line 348 of file XrdPfcFile.cc.

{
   // Called from Cache::GetFile() when a new IO asks for the file.
 
   TRACEF(Debug, "AddIO() io = " << (void*)io);
 
   time_t      now = time(0);
   std::string loc(io->GetLocation());
 
   m_state_cond.Lock();
 
   IoSet_i mi = m_io_set.find(io);
 
   if (mi == m_io_set.end())
   {
      m_io_set.insert(io);
      io->m_attach_time = now;
      m_delta_stats.IoAttach();
 
      insert_remote_location(loc);
 
      if (m_prefetch_state == kStopped)
      {
         m_prefetch_state = kOn;
         cache()->RegisterPrefetchFile(this);
      }
   }
   else
   {
      TRACEF(Error, "AddIO() io = " << (void*)io << " already registered.");
   }
 
   m_state_cond.UnLock();
}

References Debug, Error, XrdPfc::IO::GetLocation(), XrdPfc::Stats::IoAttach(), XrdSysCondVar::Lock(), TRACEF, and XrdSysCondVar::UnLock().

Referenced by XrdPfc::Cache::GetFile().

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BlockRemovedFromWriteQ()

void File::BlockRemovedFromWriteQ

(

Block *

b

)

Handle removal of a block from Cache's write queue.

Definition at line 210 of file XrdPfcFile.cc.

{
   TRACEF(Dump, "BlockRemovedFromWriteQ() block = " << (void*) b << " idx= " << b->m_offset/m_block_size);
 
   XrdSysCondVarHelper _lck(m_state_cond);
   dec_ref_count(b);
}

References XrdPfc::Block::m_offset, and TRACEF.

BlocksRemovedFromWriteQ()

void File::BlocksRemovedFromWriteQ

(

std::list< Block * > &

blocks

)

Handle removal of a set of blocks from Cache's write queue.

Definition at line 218 of file XrdPfcFile.cc.

{
   TRACEF(Dump, "BlocksRemovedFromWriteQ() n_blocks = " << blocks.size());
 
   XrdSysCondVarHelper _lck(m_state_cond);
 
   for (std::list<Block*>::iterator i = blocks.begin(); i != blocks.end(); ++i)
   {
      dec_ref_count(*i);
   }
}

References TRACEF.

Referenced by XrdPfc::Cache::RemoveWriteQEntriesFor().

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dec_ref_cnt()

int XrdPfc::File::dec_ref_cnt ( )

inline

Definition at line 288 of file XrdPfcFile.hh.

{ return --m_ref_cnt; }

FileOpen()

File * File::FileOpen ( const std::string &  path, long long  offset, long long  fileSize, XrdOucCacheIO *  inputIO  )

static

Static constructor that also does Open. Returns null ptr if Open fails.

Definition at line 140 of file XrdPfcFile.cc.

{
   File *file = new File(path, offset, fileSize);
   if ( ! file->Open(inputIO))
   {
      delete file;
      file = 0;
   }
   return file;
}

References File.

Referenced by XrdPfc::Cache::GetFile().

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FinalizeSyncBeforeExit()

bool File::FinalizeSyncBeforeExit

(

)

Returns true if any of blocks need sync. Called from Cache::dec_ref_cnt on zero ref cnt.

Definition at line 324 of file XrdPfcFile.cc.

{
   // Returns true if sync is required.
   // This method is called after corresponding IO is detached from PosixCache.
 
   XrdSysCondVarHelper _lck(m_state_cond);
   if ( ! m_in_shutdown)
   {
     if ( ! m_writes_during_sync.empty() || m_non_flushed_cnt > 0 || ! m_detach_time_logged)
     {
       report_and_merge_delta_stats();
       m_cfi.WriteIOStatDetach(m_stats);
       m_detach_time_logged = true;
       m_in_sync            = true;
       TRACEF(Debug, "FinalizeSyncBeforeExit requesting sync to write detach stats");
       return true;
     }
   }
   TRACEF(Debug, "FinalizeSyncBeforeExit sync not required");
   return false;
}

References Debug, TRACEF, and XrdPfc::Info::WriteIOStatDetach().

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Fstat()

int File::Fstat

(

struct stat &

sbuff

)

Definition at line 628 of file XrdPfcFile.cc.

{
   // Stat on an open file.
   // Corrects size to actual full size of the file.
   // Sets atime to 0 if the file is only partially downloaded, in accordance
   // with pfc.onlyifcached settings.
   // Called from IO::Fstat() and Cache::Stat() when the file is active.
   // Returns 0 on success, -errno on error.
 
   int res;
 
   if ((res = m_data_file->Fstat(&sbuff))) return res;
 
   sbuff.st_size = m_file_size;
 
   bool is_cached = cache()->DecideIfConsideredCached(m_file_size, sbuff.st_blocks * 512ll);
   if ( ! is_cached)
      sbuff.st_atime = 0;
 
   return 0;
}

References XrdOssDF::Fstat().

Referenced by XrdPfc::Cache::ConsiderCached(), XrdPfc::IOFile::Fstat(), and XrdPfc::Cache::Stat().

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get_ref_cnt()

int XrdPfc::File::get_ref_cnt ( )

inline

Definition at line 286 of file XrdPfcFile.hh.

{ return   m_ref_cnt; }

GetAccessCnt()

size_t XrdPfc::File::GetAccessCnt ( ) const

inline

Definition at line 276 of file XrdPfcFile.hh.

{ return m_cfi.GetAccessCnt(); }

References XrdPfc::Info::GetAccessCnt().

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GetBlockSize()

int XrdPfc::File::GetBlockSize ( ) const

inline

Definition at line 277 of file XrdPfcFile.hh.

{ return m_cfi.GetBufferSize(); }

References XrdPfc::Info::GetBufferSize().

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GetFileSize()

long long XrdPfc::File::GetFileSize ( ) const

inline

Definition at line 267 of file XrdPfcFile.hh.

{ return m_file_size; }

Referenced by XrdPfc::IOFile::FSize().

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GetLastAccessStats()

const Info::AStat* XrdPfc::File::GetLastAccessStats ( ) const

inline

Definition at line 275 of file XrdPfcFile.hh.

{ return m_cfi.GetLastAccessStats(); }

References XrdPfc::Info::GetLastAccessStats().

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GetLocalPath()

const std::string& XrdPfc::File::GetLocalPath ( ) const

inline

Definition at line 262 of file XrdPfcFile.hh.

{ return m_filename; }

Referenced by XrdPfc::Cache::AddWriteTask(), and XrdPfc::Cache::ReleaseFile().

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GetLog()

XrdSysError * File::GetLog

(

)

const

Definition at line 1698 of file XrdPfcFile.cc.

{
   return Cache::TheOne().GetLog();
}

References XrdPfc::Cache::GetLog(), and XrdPfc::Cache::TheOne().

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GetNBlocks()

int XrdPfc::File::GetNBlocks ( ) const

inline

Definition at line 278 of file XrdPfcFile.hh.

{ return m_cfi.GetNBlocks(); }

References XrdPfc::Info::GetNBlocks().

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GetNDownloadedBlocks()

int XrdPfc::File::GetNDownloadedBlocks ( ) const

inline

Definition at line 279 of file XrdPfcFile.hh.

{ return m_cfi.GetNDownloadedBlocks(); }

References XrdPfc::Info::GetNDownloadedBlocks().

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GetPrefetchCountOnIO()

int XrdPfc::File::GetPrefetchCountOnIO

(

IO *

io

)

GetPrefetchedBytes()

long long XrdPfc::File::GetPrefetchedBytes ( ) const

inline

Definition at line 280 of file XrdPfcFile.hh.

{ return m_prefetch_bytes; }

GetPrefetchScore()

float File::GetPrefetchScore

(

)

const

Definition at line 1693 of file XrdPfcFile.cc.

{
   return m_prefetch_score;
}

GetRemoteLocations()

std::string File::GetRemoteLocations

(

)

const

Definition at line 1717 of file XrdPfcFile.cc.

{
   std::string s;
   if ( ! m_remote_locations.empty())
   {
      size_t      sl = 0;
      int         nl = 0;
      for (std::set<std::string>::iterator i = m_remote_locations.begin(); i != m_remote_locations.end(); ++i, ++nl)
      {
         sl += i->size();
      }
      s.reserve(2 + sl + 2*nl + nl - 1 + 1);
      s = '[';
      int j = 1;
      for (std::set<std::string>::iterator i = m_remote_locations.begin(); i != m_remote_locations.end(); ++i, ++j)
      {
         s += '"'; s += *i; s += '"';
         if (j < nl) s += ',';
      }
      s += ']';
   }
   else
   {
      s = "[]";
   }
   return s;
}

GetTrace()

XrdSysTrace * File::GetTrace

(

)

const

Definition at line 1703 of file XrdPfcFile.cc.

{
   return Cache::TheOne().GetTrace();
}

References XrdPfc::Cache::GetTrace(), and XrdPfc::Cache::TheOne().

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inc_ref_cnt()

int XrdPfc::File::inc_ref_cnt ( )

inline

Definition at line 287 of file XrdPfcFile.hh.

{ return ++m_ref_cnt; }

initiate_emergency_shutdown()

long long File::initiate_emergency_shutdown

(

)

Definition at line 153 of file XrdPfcFile.cc.

{
   // Called from Cache::Unlink() when the file is currently open.
   // Cache::Unlink is also called on FSync error and when wrong number of bytes
   // is received from a remote read.
   //
   // From this point onward the file will not be written to, cinfo file will
   // not be updated, and all new read requests will return -ENOENT.
   //
   // File's entry in the Cache's active map is set to nullptr and will be
   // removed from there shortly, in any case, well before this File object
   // shuts down. Cache::Unlink() also reports the appropriate purge event.
 
   XrdSysCondVarHelper _lck(m_state_cond);
 
   m_in_shutdown = true;
 
   if (m_prefetch_state != kStopped && m_prefetch_state != kComplete)
   {
      m_prefetch_state = kStopped;
      cache()->DeRegisterPrefetchFile(this);
   }
 
   report_and_merge_delta_stats();
 
   return m_st_blocks;
}

Referenced by XrdPfc::Cache::UnlinkFile().

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ioActive()

bool File::ioActive

(

IO *

io

)

Initiate close. Return true if still IO active. Used in XrdPosixXrootd::Close()

Definition at line 241 of file XrdPfcFile.cc.

{
   // Returns true if delay is needed.
 
   TRACEF(Debug, "ioActive start for io " << io);
 
   std::string loc(io->GetLocation());
 
   {
      XrdSysCondVarHelper _lck(m_state_cond);
 
      IoSet_i mi = m_io_set.find(io);
 
      if (mi != m_io_set.end())
      {
         unsigned int n_active_reads = io->m_active_read_reqs;
 
         TRACE(Info, "ioActive for io " << io <<
                ", active_reads "       << n_active_reads <<
                ", active_prefetches "  << io->m_active_prefetches <<
                ", allow_prefetching "  << io->m_allow_prefetching <<
                ", ios_in_detach "      << m_ios_in_detach);
         TRACEF(Info,
                "\tio_map.size() "      << m_io_set.size() <<
                ", block_map.size() "   << m_block_map.size() << ", file");
 
         insert_remote_location(loc);
 
         io->m_allow_prefetching = false;
         io->m_in_detach = true;
 
         // Check if any IO is still available for prfetching. If not, stop it.
         if (m_prefetch_state == kOn || m_prefetch_state == kHold)
         {
            if ( ! select_current_io_or_disable_prefetching(false) )
            {
               TRACEF(Debug, "ioActive stopping prefetching after io " << io << " retreat.");
            }
         }
 
         // On last IO, consider write queue blocks. Note, this also contains
         // blocks being prefetched.
 
         bool io_active_result;
 
         if (n_active_reads > 0)
         {
            io_active_result = true;
         }
         else if (m_io_set.size() - m_ios_in_detach == 1)
         {
            io_active_result = ! m_block_map.empty();
         }
         else
         {
            io_active_result = io->m_active_prefetches > 0;
         }
 
         if ( ! io_active_result)
         {
            ++m_ios_in_detach;
         }
 
         TRACEF(Info, "ioActive for io " << io << " returning " << io_active_result << ", file");
 
         return io_active_result;
      }
      else
      {
         TRACEF(Error, "ioActive io " << io <<" not found in IoSet. This should not happen.");
         return false;
      }
   }
}

References Debug, Error, XrdPfc::IO::GetLocation(), XrdPfc::IO::m_active_read_reqs, TRACE, and TRACEF.

Referenced by XrdPfc::IOFile::ioActive().

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ioUpdated()

void File::ioUpdated

(

IO *

io

)

Notification from IO that it has been updated (remote open).

Definition at line 232 of file XrdPfcFile.cc.

{
   std::string loc(io->GetLocation());
   XrdSysCondVarHelper _lck(m_state_cond);
   insert_remote_location(loc);
}

References XrdPfc::IO::GetLocation().

Referenced by XrdPfc::IOFile::Update().

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is_in_emergency_shutdown()

bool XrdPfc::File::is_in_emergency_shutdown ( )

inline

Definition at line 291 of file XrdPfcFile.hh.

{ return m_in_shutdown; }

lPath()

const char * File::lPath

(

)

const

Log path.

Definition at line 1605 of file XrdPfcFile.cc.

{
   return m_filename.c_str();
}

Referenced by XrdPfc::Cache::ProcessWriteTasks(), and XrdPfc::Cache::RemoveWriteQEntriesFor().

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Prefetch()

void File::Prefetch

(

)

Definition at line 1620 of file XrdPfcFile.cc.

{
   // Check that block is not on disk and not in RAM.
   // TODO: Could prefetch several blocks at once!
   //       blks_max could be an argument
 
   BlockList_t blks;
 
   TRACEF(DumpXL, "Prefetch() entering.");
   {
      XrdSysCondVarHelper _lck(m_state_cond);
 
      if (m_prefetch_state != kOn)
      {
         return;
      }
 
      if ( ! select_current_io_or_disable_prefetching(true) )
      {
         TRACEF(Error, "Prefetch no available IO object found, prefetching stopped. This should not happen, i.e., prefetching should be stopped before.");
         return;
      }
 
      // Select block(s) to fetch.
      for (int f = 0; f < m_num_blocks; ++f)
      {
         if ( ! m_cfi.TestBitWritten(f))
         {
            int f_act = f + m_offset / m_block_size;
 
            BlockMap_i bi = m_block_map.find(f_act);
            if (bi == m_block_map.end())
            {
               Block *b = PrepareBlockRequest(f_act, *m_current_io, nullptr, true);
               if (b)
               {
                  TRACEF(Dump, "Prefetch take block " << f_act);
                  blks.push_back(b);
                  // Note: block ref_cnt not increased, it will be when placed into write queue.
 
                  inc_prefetch_read_cnt(1);
               }
               else
               {
                  // This shouldn't happen as prefetching stops when RAM is 70% full.
                  TRACEF(Warning, "Prefetch allocation failed for block " << f_act);
               }
               break;
            }
         }
      }
 
      if (blks.empty())
      {
         TRACEF(Debug, "Prefetch file is complete, stopping prefetch.");
         m_prefetch_state = kComplete;
         cache()->DeRegisterPrefetchFile(this);
      }
      else
      {
         (*m_current_io)->m_active_prefetches += (int) blks.size();
      }
   }
 
   if ( ! blks.empty())
   {
      ProcessBlockRequests(blks);
   }
}

References Debug, Error, XrdPfc::Info::TestBitWritten(), TRACEF, and TPC::Warning.

Referenced by XrdPfc::Cache::Prefetch().

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Read()

int File::Read	(	IO *	io,
		char *	buff,
		long long	offset,
		int	size,
		ReadReqRH *	rh
	)

Normal read.

Definition at line 813 of file XrdPfcFile.cc.

{
   // rrc_func is ONLY called from async processing.
   // If this function returns anything other than -EWOULDBLOCK, rrc_func needs to be called by the caller.
   // This streamlines implementation of synchronous IO::Read().
 
   TRACEF(Dump, "Read() sid: " << Xrd::hex1 << rh->m_seq_id << " size: " << iUserSize);
 
   m_state_cond.Lock();
 
   if (m_in_shutdown || io->m_in_detach)
   {
      m_state_cond.UnLock();
      return m_in_shutdown ? -ENOENT : -EBADF;
   }
 
   // Shortcut -- file is fully downloaded.
 
   if (m_cfi.IsComplete())
   {
      m_state_cond.UnLock();
      int ret = m_data_file->Read(iUserBuff, iUserOff, iUserSize);
      if (ret > 0) {
         XrdSysCondVarHelper _lck(m_state_cond);
         m_delta_stats.AddBytesHit(ret);
         check_delta_stats();
      }
      return ret;
   }
 
   XrdOucIOVec readV( { iUserOff, iUserSize, 0, iUserBuff } );
 
   return ReadOpusCoalescere(io, &readV, 1, rh, "Read() ");
}

References XrdPfc::Stats::AddBytesHit(), Xrd::hex1, XrdPfc::Info::IsComplete(), XrdSysCondVar::Lock(), XrdPfc::ReadReqRH::m_seq_id, XrdOssDF::Read(), TRACEF, and XrdSysCondVar::UnLock().

Referenced by XrdPfc::IOFileBlock::Read().

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ReadV()

int File::ReadV	(	IO *	io,
		const XrdOucIOVec *	readV,
		int	readVnum,
		ReadReqRH *	rh
	)

Vector read.

Definition at line 850 of file XrdPfcFile.cc.

{
   TRACEF(Dump, "ReadV() for " << readVnum << " chunks.");
 
   m_state_cond.Lock();
 
   if (m_in_shutdown || io->m_in_detach)
   {
      m_state_cond.UnLock();
      return m_in_shutdown ? -ENOENT : -EBADF;
   }
 
   // Shortcut -- file is fully downloaded.
 
   if (m_cfi.IsComplete())
   {
      m_state_cond.UnLock();
      int ret = m_data_file->ReadV(const_cast<XrdOucIOVec*>(readV), readVnum);
      if (ret > 0) {
         XrdSysCondVarHelper _lck(m_state_cond);
         m_delta_stats.AddBytesHit(ret);
         check_delta_stats();
      }
      return ret;
   }
 
   return ReadOpusCoalescere(io, readV, readVnum, rh, "ReadV() ");
}

References XrdPfc::Stats::AddBytesHit(), XrdPfc::Info::IsComplete(), XrdSysCondVar::Lock(), XrdOssDF::ReadV(), TRACEF, and XrdSysCondVar::UnLock().

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RefStats()

const Stats& XrdPfc::File::RefStats ( ) const

inline

Definition at line 281 of file XrdPfcFile.hh.

{ return m_stats; }

RemoveIO()

void File::RemoveIO

(

IO *

io

)

Definition at line 385 of file XrdPfcFile.cc.

{
   // Called from Cache::ReleaseFile.
 
   TRACEF(Debug, "RemoveIO() io = " << (void*)io);
 
   time_t now = time(0);
 
   m_state_cond.Lock();
 
   IoSet_i mi = m_io_set.find(io);
 
   if (mi != m_io_set.end())
   {
      if (mi == m_current_io)
      {
         ++m_current_io;
      }
 
      m_delta_stats.IoDetach(now - io->m_attach_time);
      m_io_set.erase(mi);
      --m_ios_in_detach;
 
      if (m_io_set.empty() && m_prefetch_state != kStopped && m_prefetch_state != kComplete)
      {
         TRACEF(Error, "RemoveIO() io = " << (void*)io << " Prefetching is not stopped/complete -- it should be by now.");
         m_prefetch_state = kStopped;
         cache()->DeRegisterPrefetchFile(this);
      }
   }
   else
   {
      TRACEF(Error, "RemoveIO() io = " << (void*)io << " is NOT registered.");
   }
 
   m_state_cond.UnLock();
}

References Debug, Error, XrdPfc::Stats::IoDetach(), XrdSysCondVar::Lock(), TRACEF, and XrdSysCondVar::UnLock().

Referenced by XrdPfc::Cache::ReleaseFile().

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RequestSyncOfDetachStats()

void File::RequestSyncOfDetachStats

(

)

Flags that detach stats should be written out in final sync. Called from CacheIO upon Detach.

Definition at line 318 of file XrdPfcFile.cc.

{
   XrdSysCondVarHelper _lck(m_state_cond);
   m_detach_time_logged = false;
}

Referenced by XrdPfc::IOFile::DetachFinalize().

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StopPrefetchingOnIO()

void XrdPfc::File::StopPrefetchingOnIO

(

IO *

io

)

Sync()

void File::Sync

(

)

Sync file cache inf o and output data with disk.

Definition at line 1219 of file XrdPfcFile.cc.

{
   TRACEF(Dump, "Sync()");
 
   int ret     = m_data_file->Fsync();
   bool errorp = false;
   if (ret == XrdOssOK)
   {
      Stats loc_stats;
      {
         XrdSysCondVarHelper _lck(&m_state_cond);
         report_and_merge_delta_stats();
         loc_stats = m_stats;
      }
      m_cfi.WriteIOStat(loc_stats);
      m_cfi.Write(m_info_file, m_filename.c_str());
      int cret = m_info_file->Fsync();
      if (cret != XrdOssOK)
      {
         TRACEF(Error, "Sync cinfo file sync error " << cret);
         errorp = true;
      }
   }
   else
   {
      TRACEF(Error, "Sync data file sync error " << ret << ", cinfo file has not been updated");
      errorp = true;
   }
 
   if (errorp)
   {
      TRACEF(Error, "Sync failed, unlinking local files and initiating shutdown of File object");
 
      // Unlink will also call this->initiate_emergency_shutdown()
      Cache::GetInstance().UnlinkFile(m_filename, false);
 
      XrdSysCondVarHelper _lck(&m_state_cond);
 
      m_writes_during_sync.clear();
      m_in_sync = false;
 
      return;
   }
 
   int  written_while_in_sync;
   bool resync = false;
   {
      XrdSysCondVarHelper _lck(&m_state_cond);
      for (std::vector<int>::iterator i = m_writes_during_sync.begin(); i != m_writes_during_sync.end(); ++i)
      {
         m_cfi.SetBitSynced(*i);
      }
      written_while_in_sync = m_non_flushed_cnt = (int) m_writes_during_sync.size();
      m_writes_during_sync.clear();
 
      // If there were writes during sync and the file is now complete,
      // let us call Sync again without resetting the m_in_sync flag.
      if (written_while_in_sync > 0 && m_cfi.IsComplete() && ! m_in_shutdown)
         resync = true;
      else
         m_in_sync = false;
   }
   TRACEF(Dump, "Sync "<< written_while_in_sync  << " blocks written during sync." << (resync ? " File is now complete - resyncing." : ""));
 
   if (resync)
      Sync();
}

References Error, XrdOssDF::Fsync(), XrdPfc::Cache::GetInstance(), XrdPfc::Info::IsComplete(), XrdPfc::Info::SetBitSynced(), TRACEF, XrdPfc::Cache::UnlinkFile(), XrdPfc::Info::Write(), XrdPfc::Info::WriteIOStat(), and XrdOssOK.

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WriteBlockToDisk()

void File::WriteBlockToDisk

(

Block *

b

)

Definition at line 1133 of file XrdPfcFile.cc.

{
   // write block buffer into disk file
   long long   offset = b->m_offset - m_offset;
   long long   size   = b->get_size();
   ssize_t     retval;
 
   if (m_cfi.IsCkSumCache())
      if (b->has_cksums())
         retval = m_data_file->pgWrite(b->get_buff(), offset, size, b->ref_cksum_vec().data(), 0);
      else
         retval = m_data_file->pgWrite(b->get_buff(), offset, size, 0, 0);
   else
      retval = m_data_file->Write(b->get_buff(), offset, size);
 
   if (retval < size)
   {
      if (retval < 0) {
         TRACEF(Error, "WriteToDisk() write error " << retval);
      } else {
         TRACEF(Error, "WriteToDisk() incomplete block write ret=" << retval << " (should be " << size << ")");
      }
 
      XrdSysCondVarHelper _lck(m_state_cond);
 
      dec_ref_count(b);
 
      return;
   }
 
   const int blk_idx =  (b->m_offset - m_offset) / m_block_size;
 
   // Set written bit.
   TRACEF(Dump, "WriteToDisk() success set bit for block " <<  b->m_offset << " size=" <<  size);
 
   bool schedule_sync = false;
   {
      XrdSysCondVarHelper _lck(m_state_cond);
 
      m_cfi.SetBitWritten(blk_idx);
 
      if (b->m_prefetch)
      {
         m_cfi.SetBitPrefetch(blk_idx);
      }
      if (b->req_cksum_net() && ! b->has_cksums() && m_cfi.IsCkSumNet())
      {
         m_cfi.ResetCkSumNet();
      }
 
      // Set synced bit or stash block index if in actual sync.
      // Synced state is only written out to cinfo file when data file is synced.
      if (m_in_sync)
      {
         m_writes_during_sync.push_back(blk_idx);
      }
      else
      {
         m_cfi.SetBitSynced(blk_idx);
         ++m_non_flushed_cnt;
         if ((m_cfi.IsComplete() || m_non_flushed_cnt >= Cache::GetInstance().RefConfiguration().m_flushCnt) &&
             ! m_in_shutdown)
         {
            schedule_sync     = true;
            m_in_sync         = true;
            m_non_flushed_cnt = 0;
         }
      }
      // As soon as the reference count is decreased on the block, the
      // file object may be deleted.  Thus, to avoid holding both locks at a time,
      // we defer the ref count decrease until later if a sync is needed
      if (!schedule_sync) {
         dec_ref_count(b);
      }
   }
 
   if (schedule_sync)
   {
      cache()->ScheduleFileSync(this);
      XrdSysCondVarHelper _lck(m_state_cond);
      dec_ref_count(b);
   }
}

References Error, XrdPfc::Block::get_buff(), XrdPfc::Block::get_size(), XrdPfc::Cache::GetInstance(), XrdPfc::Block::has_cksums(), XrdPfc::Info::IsCkSumCache(), XrdPfc::Info::IsCkSumNet(), XrdPfc::Info::IsComplete(), XrdPfc::Configuration::m_flushCnt, XrdPfc::Block::m_offset, XrdPfc::Block::m_prefetch, XrdOssDF::pgWrite(), XrdPfc::Block::ref_cksum_vec(), XrdPfc::Cache::RefConfiguration(), XrdPfc::Block::req_cksum_net(), XrdPfc::Info::ResetCkSumNet(), XrdPfc::Info::SetBitPrefetch(), XrdPfc::Info::SetBitSynced(), XrdPfc::Info::SetBitWritten(), TRACEF, and XrdOssDF::Write().

Referenced by XrdPfc::Cache::ProcessWriteTasks().

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Friends And Related Function Documentation

BlockResponseHandler

friend class BlockResponseHandler

friend

Definition at line 205 of file XrdPfcFile.hh.

Cache

friend class Cache

friend

Definition at line 204 of file XrdPfcFile.hh.

DirectResponseHandler

friend class DirectResponseHandler

friend

Definition at line 206 of file XrdPfcFile.hh.

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The documentation for this class was generated from the following files:

• XrdPfcFile.hh
• XrdPfcFile.cc