RFIOFile Class Reference

#include <RFIOFile.h>

Inheritance diagram for RFIOFile:

Public Member Functions
virtual void	abort (void)
virtual void	close (void)
virtual void	create (const char *name, bool exclusive=false, int perms=0666)
virtual void	create (const std::string &name, bool exclusive=false, int perms=0666)
virtual void	open (const char *name, int flags=IOFlags::OpenRead, int perms=0666)
virtual void	open (const std::string &name, int flags=IOFlags::OpenRead, int perms=0666)
virtual IOOffset	position (IOOffset offset, Relative whence=SET)
virtual IOSize	read (void *into, IOSize n)
virtual IOSize	readv (IOPosBuffer *into, IOSize buffers)
virtual void	resize (IOOffset size)
	RFIOFile (void)
	RFIOFile (IOFD fd)
	RFIOFile (const char *name, int flags=IOFlags::OpenRead, int perms=0666)
	RFIOFile (const std::string &name, int flags=IOFlags::OpenRead, int perms=0666)
virtual IOSize	write (const void *from, IOSize n)
	~RFIOFile (void)
Public Member Functions inherited from Storage
virtual bool	eof (void) const
virtual void	flush (void)
virtual IOOffset	position (void) const
virtual bool	prefetch (const IOPosBuffer *what, IOSize n)
virtual IOSize	read (void *into, IOSize n, IOOffset pos)
IOSize	read (IOBuffer into, IOOffset pos)
virtual void	rewind (void)
virtual IOOffset	size (void) const
	Storage (void)
virtual IOSize	write (const void *from, IOSize n, IOOffset pos)
IOSize	write (IOBuffer from, IOOffset pos)
virtual IOSize	writev (const IOPosBuffer *from, IOSize buffers)
virtual	~Storage (void)
Public Member Functions inherited from IOInput
int	read (void)
IOSize	read (IOBuffer into)
virtual IOSize	readv (IOBuffer *into, IOSize buffers)
IOSize	xread (IOBuffer into)
IOSize	xread (void *into, IOSize n)
IOSize	xreadv (IOBuffer *into, IOSize buffers)
virtual	~IOInput (void)
	Destruct the stream. A no-op. More...
Public Member Functions inherited from IOOutput
IOSize	write (unsigned char byte)
IOSize	write (IOBuffer from)
virtual IOSize	writev (const IOBuffer *from, IOSize buffers)
IOSize	xwrite (const void *from, IOSize n)
IOSize	xwrite (IOBuffer from)
IOSize	xwritev (const IOBuffer *from, IOSize buffers)
virtual	~IOOutput (void)
	Destruct the stream. A no-op. More...

Private Member Functions
void	reopen ()
ssize_t	retryRead (void *into, IOSize n, int maxRetry=10)

Private Attributes
bool	m_close
IOOffset	m_curpos
IOFD	m_fd
int	m_flags
std::string	m_name
int	m_perms

Additional Inherited Members
Public Types inherited from Storage
enum	Relative { SET, CURRENT, END }

Detailed Description

RFIO Storage object.

Definition at line 9 of file RFIOFile.h.

Constructor & Destructor Documentation

RFIOFile::RFIOFile

(

void

)

Definition at line 30 of file RFIOFile.cc.

  : m_fd (EDM_IOFD_INVALID),
    m_close (false),
    m_flags (0),
    m_perms (0),
    m_curpos (0)
{}

RFIOFile::RFIOFile

(

IOFD

fd

)

Definition at line 38 of file RFIOFile.cc.

  : m_fd (fd),
    m_close (true),
    m_flags (0),
    m_perms (0),
    m_curpos (0)
{}

RFIOFile::RFIOFile	(	const char *	name,
		int	flags = IOFlags::OpenRead,
		int	perms = 0666
	)

Definition at line 46 of file RFIOFile.cc.

References open().

  : m_fd (EDM_IOFD_INVALID),
    m_close (false),
    m_flags (0),
    m_perms (0),
    m_curpos (0)
{ open (name, flags, perms); }

RFIOFile::RFIOFile	(	const std::string &	name,
		int	flags = IOFlags::OpenRead,
		int	perms = 0666
	)

Definition at line 56 of file RFIOFile.cc.

References flags, and open().

  : m_fd (EDM_IOFD_INVALID),
    m_close (false),
    m_flags (0),
    m_perms (0),
    m_curpos (0)
{ open (name.c_str (), flags, perms); }

RFIOFile::~RFIOFile

(

void

)

Definition at line 66 of file RFIOFile.cc.

References m_close, and m_name.

{
  if (m_close)
    edm::LogError("RFIOFileError")
      << "Destructor called on RFIO file '" << m_name
      << "' but the file is still open";
}

Member Function Documentation

void RFIOFile::abort ( void  )

virtual

Definition at line 245 of file RFIOFile.cc.

References EDM_IOFD_INVALID, m_close, m_fd, rfio_close64(), and serrno.

{
  serrno = 0;
  if (m_fd != EDM_IOFD_INVALID)
    rfio_close64 (m_fd);

  m_close = false;
  m_fd = EDM_IOFD_INVALID;
}

void RFIOFile::close ( void  )

virtual

Reimplemented from Storage.

Definition at line 201 of file RFIOFile.cc.

References EDM_IOFD_INVALID, m_close, m_fd, m_name, rfio_close64(), rfio_errno, rfio_serror(), serrno, stor::utils::sleep(), and ntuplemaker::status.

Referenced by lumiQTWidget.ApplicationWindow::fileQuit(), Vispa.Gui.BoxContentDialog.BoxContentDialog::keyPressEvent(), Vispa.Gui.FindDialog.FindDialog::keyPressEvent(), open(), and reopen().

{
  if (m_fd == EDM_IOFD_INVALID)
  {
    edm::LogError("RFIOFileError")
      << "RFIOFile::close(name='" << m_name
      << "') called but the file is not open";
    m_close = false;
    return;
  }

  serrno = 0;
  if (rfio_close64 (m_fd) == -1)
  {
    // If we fail to close the file, report a warning.
    edm::LogWarning("RFIOFileWarning")
      << "rfio_close64(name='" << m_name
      << "') failed with error '" << rfio_serror()
      << "' (rfio_errno=" << rfio_errno << ", serrno=" << serrno << ")";

    // When rfio_close64 fails then try the system close function as
    // per the advice from Olof Barring from the Castor operations.
    int status = ::close(m_fd);
    if (status < 0)
      edm::LogWarning("RFIOFileWarning")
        << "RFIOFile::close(): system level close after a failed"
        << " rfio_close64 also failed with error '" << strerror (errno)
        << "' (error code " << errno << ")";
    else
      edm::LogWarning("RFIOFileWarning")
        << "RFIOFile::close(): system level close after a failed"
        << " rfio_close64 succeeded";

    sleep(5);
  }

  m_close = false;
  m_fd = EDM_IOFD_INVALID;

  // Caused hang.  Will be added back after problem is fix
  // edm::LogInfo("RFIOFileInfo") << "Closed " << m_name;
}

void RFIOFile::create ( const char *  name, bool  exclusive = false, int  perms = 0666  )

virtual

Definition at line 77 of file RFIOFile.cc.

References open(), IOFlags::OpenCreate, IOFlags::OpenExclusive, IOFlags::OpenTruncate, and IOFlags::OpenWrite.

{
  open (name,
    (IOFlags::OpenCreate | IOFlags::OpenWrite | IOFlags::OpenTruncate
     | (exclusive ? IOFlags::OpenExclusive : 0)),
    perms);
}

void RFIOFile::create ( const std::string &  name, bool  exclusive = false, int  perms = 0666  )

virtual

Definition at line 88 of file RFIOFile.cc.

References open(), IOFlags::OpenCreate, IOFlags::OpenExclusive, IOFlags::OpenTruncate, and IOFlags::OpenWrite.

{
  open (name.c_str (),
    (IOFlags::OpenCreate | IOFlags::OpenWrite | IOFlags::OpenTruncate
     | (exclusive ? IOFlags::OpenExclusive : 0)),
    perms);
}

void RFIOFile::open ( const char *  name, int  flags = IOFlags::OpenRead, int  perms = 0666  )

virtual

Definition at line 105 of file RFIOFile.cc.

References cms::Exception::addContext(), close(), EDM_IOFD_INVALID, edm::errors::FileOpenError, flags, m_close, m_curpos, m_fd, m_flags, m_name, m_perms, mergeVDriftHistosByStation::name, O_NONBLOCK, IOFlags::OpenAppend, IOFlags::OpenCreate, IOFlags::OpenExclusive, IOFlags::OpenNonBlock, IOFlags::OpenRead, IOFlags::OpenTruncate, IOFlags::OpenUnbuffered, IOFlags::OpenWrite, rfio_errno, rfio_open64(), RFIO_READOPT, rfio_serror(), rfiosetopt(), serrno, and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by create(), open(), reopen(), and RFIOFile().

{
  // Save parameters for error recovery.
  if (name == 0) {
    m_name = "";
  } else {
    m_name = name;
  }
  m_flags = flags;
  m_perms = perms;

  // Reset RFIO error code.
  serrno = 0;

  // Disable buffering in rfio library?  Note that doing this on
  // one file disables it for everything.  Not much we can do...
  // but it does make a significant performance difference to the
  // clients.  Note also that docs say the flag turns off write
  // buffering -- this turns off all buffering.
  if (flags & IOFlags::OpenUnbuffered)
  {
    int readopt = 0;
    rfiosetopt (RFIO_READOPT, &readopt, sizeof (readopt));
  }
  else 
  {
    int readopt = 1;
    rfiosetopt (RFIO_READOPT, &readopt, sizeof (readopt));
  }

  if ((name == 0) || (*name == 0)) {
    edm::Exception ex(edm::errors::FileOpenError);
    ex << "Cannot open a file without a name";
    ex.addContext("Calling RFIOFile::open()");
    throw ex;
  }
  if ((flags & (IOFlags::OpenRead | IOFlags::OpenWrite)) == 0) {
    edm::Exception ex(edm::errors::FileOpenError);
    ex << "Must open file '" << name << "' at least for read or write";
    ex.addContext("Calling RFIOFile::open()");
    throw ex;
  }
  std::string lname (name);
  if (lname.find ("//") == 0)
    lname.erase(0, 1);

  // If I am already open, close old file first
  if (m_fd != EDM_IOFD_INVALID && m_close)
    close ();

  // Translate our flags to system flags
  int openflags = 0;

  if ((flags & IOFlags::OpenRead) && (flags & IOFlags::OpenWrite))
    openflags |= O_RDWR;
  else if (flags & IOFlags::OpenRead)
    openflags |= O_RDONLY;
  else if (flags & IOFlags::OpenWrite)
    openflags |= O_WRONLY;

  if (flags & IOFlags::OpenNonBlock)
    openflags |= O_NONBLOCK;

  if (flags & IOFlags::OpenAppend)
    openflags |= O_APPEND;

  if (flags & IOFlags::OpenCreate)
    openflags |= O_CREAT;

  if (flags & IOFlags::OpenExclusive)
    openflags |= O_EXCL;

  if (flags & IOFlags::OpenTruncate)
    openflags |= O_TRUNC;

  IOFD newfd = EDM_IOFD_INVALID;
  if ((newfd = rfio_open64 (lname.c_str(), openflags, perms)) == -1) {
    edm::Exception ex(edm::errors::FileOpenError);
    ex << "rfio_open(name='" << lname
       << "', flags=0x" << std::hex << openflags
       << ", permissions=0" << std::oct << perms << std::dec
       << ") => error '" << rfio_serror ()
       << "' (rfio_errno=" << rfio_errno << ", serrno=" << serrno << ")";
    ex.addContext("Calling RFIOFile::open()");
    throw ex;
  }
  m_fd = newfd;
  m_close = true;
  m_curpos = 0;

  edm::LogInfo("RFIOFileInfo") << "Opened " << lname;
}

void RFIOFile::open ( const std::string &  name, int  flags = IOFlags::OpenRead, int  perms = 0666  )

virtual

Definition at line 99 of file RFIOFile.cc.

References flags, and open().

{ open (name.c_str (), flags, perms); }

IOOffset RFIOFile::position ( IOOffset  offset, Relative  whence = SET  )

virtual

Implements Storage.

Definition at line 382 of file RFIOFile.cc.

References cms::Exception::addContext(), Storage::CURRENT, EDM_IOFD_INVALID, Storage::END, m_curpos, m_fd, m_name, query::result, rfio_errno, rfio_lseek64(), rfio_serror(), serrno, and Storage::SET.

{
  if (m_fd == EDM_IOFD_INVALID) {
    cms::Exception ex("FilePositionError");
    ex << "RFIOFile::position() called on a closed file";
    throw ex;
  }
  if (whence != CURRENT && whence != SET && whence != END) {
    cms::Exception ex("FilePositionError");
    ex << "RFIOFile::position() called with incorrect 'whence' parameter";
    throw ex;
  }
  IOOffset  result;
  int       mywhence = (whence == SET ? SEEK_SET
                    : whence == CURRENT ? SEEK_CUR
                : SEEK_END);

  serrno = 0;
  if ((result = rfio_lseek64 (m_fd, offset, mywhence)) == -1) {
    cms::Exception ex("FilePositionError");
    ex << "rfio_lseek(name='" << m_name << "', offset=" << offset
       << ", whence=" << mywhence << ") failed at position "
       << m_curpos << " with error '" << rfio_serror()
       << "' (rfio_errno=" << rfio_errno << ", serrno=" << serrno << ")";
    ex.addContext("Calling RFIOFile::position()");
    throw ex;
  }
  m_curpos = result;
  return result;
}

IOSize RFIOFile::read ( void *  into, IOSize  n  )

virtual

Read into into at most n number of bytes.

If this is a blocking stream, the call will block until some data can be read, end of input is reached, or an exception is thrown. For a non-blocking stream the available input is returned. If none is available, an exception is thrown.

Returns

The number of bytes actually read. This is less or equal to the size of the buffer. Zero indicates that the end of the input has been reached: end of file, or remote end closing for a connected channel like a pipe or a socket. Otherwise the value can be less than requested if limited amount of input is currently available for platform or implementation reasons.

Exceptions

In	case of error, a #IOError exception is thrown. This includes the situation where the input stream is in non-blocking mode and no input is currently available (FIXME: make this simpler; clarify which exception).

Implements IOInput.

Definition at line 326 of file RFIOFile.cc.

References cms::Exception::addContext(), end, edm::errors::FileReadError, LogDebug, m_curpos, m_name, realNanoSecs(), retryRead(), rfio_errno, rfio_serror(), alignCSCRings::s, serrno, and dqm_diff::start.

{
  // Be aware that when enabled these LogDebug prints
  // will take more time than the read itself unless the reads
  // are proceeding slower than under optimal conditions.
  LogDebug("RFIOFileDebug") << "Entering RFIOFile read()";
  double start = realNanoSecs();

  ssize_t s;
  serrno = 0;
  if ((s = retryRead (into, n, 3)) < 0) {
    edm::Exception ex(edm::errors::FileReadError);
    ex << "rfio_read(name='" << m_name << "', n=" << n << ") failed"
       << " at position " << m_curpos << " with error '" << rfio_serror()
       << "' (rfio_errno=" << rfio_errno << ", serrno=" << serrno << ")";
    ex.addContext("Calling RFIOFile::read()");
    throw ex;
  }
  m_curpos += s;

  double end = realNanoSecs();
  LogDebug("RFIOFileDebug")
    << "Exiting RFIOFile read(), elapsed time = " << end - start
    << " ns, bytes read = " << s << ", file position = " << m_curpos;

  return s;
}

IOSize RFIOFile::readv ( IOPosBuffer *  into, IOSize  buffers  )

virtual

Reimplemented from Storage.

Definition at line 355 of file RFIOFile.cc.

References m_flags, IOFlags::OpenUnbuffered, Storage::prefetch(), and Storage::readv().

{
  if (! (m_flags & IOFlags::OpenUnbuffered))
    prefetch(into, buffers);
  return Storage::readv(into, buffers);
}

void RFIOFile::reopen ( void  )

private

Definition at line 255 of file RFIOFile.cc.

References close(), m_curpos, m_flags, m_name, m_perms, open(), Storage::position(), and stor::utils::sleep().

Referenced by retryRead().

{
  // Remember the current position in the file
  IOOffset lastpos = m_curpos;
  close();
  sleep(5);
  open(m_name, m_flags, m_perms);

  // Set the position back to the same place it was
  // before the file closed and opened.
  position(lastpos);
}

void RFIOFile::resize ( IOOffset  size )

virtual

Implements Storage.

Definition at line 414 of file RFIOFile.cc.

References m_name.

Referenced by Vispa.Gui.TextDialog.TextDialog::__init__(), Vispa.Plugins.ConfigEditor.ToolDialog.ToolDialog::__init__(), Vispa.Main.MainWindow.MainWindow::_loadIni(), and Vispa.Gui.PortConnection.PointToPointConnection::updateConnection().

{
  cms::Exception ex("FileResizeError");
  ex << "RFIOFile::resize(name='" << m_name << "') not implemented";
  throw ex;
}

ssize_t RFIOFile::retryRead ( void *  into, IOSize  n, int  maxRetry = 10  )

private

Definition at line 269 of file RFIOFile.cc.

References edm::FlushMessageLog(), m_curpos, m_fd, m_name, reopen(), rfio_errno, rfio_read64(), rfio_serror(), alignCSCRings::s, serrno, and stor::utils::sleep().

Referenced by read().

{
  // Attempt to read up to maxRetry times.
  ssize_t s;
  do
  {
    serrno = 0;
    s = rfio_read64 (m_fd, into, n);
    if ((s == -1 && serrno == 1004) || (s > ssize_t (n)))
    {
      // Wait a little while to allow Castor to recover from the timeout.
      const char *sleepTimeMsg;
      int secondsToSleep = 5;
      switch (maxRetry)
      {
      case 1:
        sleepTimeMsg = "10 minutes";
        secondsToSleep = 600;
        break;

      case 2:
        sleepTimeMsg = "5 minutes";
        secondsToSleep = 300;
        break;

      default:
        sleepTimeMsg = "1 minute";
        secondsToSleep = 60;
      }

      edm::LogWarning("RFIOFileRetry")
        << "RFIOFile retrying read\n"
        << "  return value from rfio_read64 = " << s << " (normally this is bytes read, -1 for error)\n"
        << "  bytes requested = " << n << "  (this and bytes read are equal unless error or EOF)\n"
        << "  rfio error message = " << rfio_serror() << " (explanation from server, if possible)\n"
        << "  serrno = " << serrno << " (rfio server error code, 0 = OK, 1004 = timeout, ...)\n"
        << "  rfio_errno = " << rfio_errno << " (rfio error from actually accessing the file)\n"
        << "  current position = " << m_curpos << " (in bytes, beginning of file is 0)\n"
        << "  retries left before quitting = " << maxRetry << "\n"
        << "  will close and reopen file " << m_name << "\n"
        << "  will sleep for " << sleepTimeMsg << " before attempting retry";
      edm::FlushMessageLog();
      sleep(secondsToSleep);

      // Improve the chances of success by closing and reopening
      // the file before retrying the read.  This also resets
      // the position in the file to the correct place.
      reopen();
    }
    else
      break;
  } while (--maxRetry > 0);

  return s;
}

IOSize RFIOFile::write ( const void *  from, IOSize  n  )

virtual

Write n bytes of data starting at address from.

Returns

The number of bytes written. Normally this will be n, but can be less, even zero, for example if the stream is non-blocking mode and cannot accept input at this time.

Exceptions

In	case of error, an exception is thrown. However if the stream is in non-blocking mode and cannot accept output, it will not throw an exception – the return value will be less than requested.

Implements IOOutput.

Definition at line 363 of file RFIOFile.cc.

References cms::Exception::addContext(), m_curpos, m_fd, m_name, rfio_errno, rfio_serror(), rfio_write64(), alignCSCRings::s, and serrno.

{
  serrno = 0;
  ssize_t s = rfio_write64 (m_fd, from, n);
  if (s < 0) {
    cms::Exception ex("FileWriteError");
    ex << "rfio_write(name='" << m_name << "', n=" << n << ") failed"
       << " at position " << m_curpos << " with error '" << rfio_serror()
       << "' (rfio_errno=" << rfio_errno << ", serrno=" << serrno << ")";
    ex.addContext("Calling RFIOFile::write()");
    throw ex;
  }
  return s;
}

Member Data Documentation

bool RFIOFile::m_close

private

Definition at line 55 of file RFIOFile.h.

Referenced by abort(), close(), open(), and ~RFIOFile().

IOOffset RFIOFile::m_curpos

private

Definition at line 59 of file RFIOFile.h.

Referenced by open(), position(), read(), reopen(), retryRead(), and write().

IOFD RFIOFile::m_fd

private

Definition at line 54 of file RFIOFile.h.

Referenced by abort(), close(), open(), position(), retryRead(), and write().

int RFIOFile::m_flags

private

Definition at line 57 of file RFIOFile.h.

Referenced by open(), readv(), and reopen().

std::string RFIOFile::m_name

private

Definition at line 56 of file RFIOFile.h.

Referenced by close(), open(), position(), read(), reopen(), resize(), retryRead(), write(), and ~RFIOFile().

int RFIOFile::m_perms

private

Definition at line 58 of file RFIOFile.h.

Referenced by open(), and reopen().