XrdOssCsiFile Class Reference

#include <XrdOssCsi.hh>

Inheritance diagram for XrdOssCsiFile:

Collaboration diagram for XrdOssCsiFile:

Classes
struct	puMapItem_t

Public Member Functions
	XrdOssCsiFile (XrdOss *parent, const char *tid, XrdOssCsiConfig &cf)
virtual	~XrdOssCsiFile ()
void	aioDec ()
void	aioInc ()
void	aioWait ()
virtual int	Close (long long *retsz=0)
virtual void	Flush ()
	Flush filesystem cached pages for this file (used for checksums). More...
virtual int	Fstat (struct stat *)
virtual int	Fsync ()
virtual int	Fsync (XrdSfsAio *)
virtual int	Ftruncate (unsigned long long)
virtual int	getFD ()
virtual off_t	getMmap (void **addr)
virtual int	Open (const char *, int, mode_t, XrdOucEnv &)
XrdOssCsiPages *	Pages ()
virtual ssize_t	pgRead (void *, off_t, size_t, uint32_t *, uint64_t)
virtual int	pgRead (XrdSfsAio *, uint64_t)
virtual ssize_t	pgWrite (void *, off_t, size_t, uint32_t *, uint64_t)
virtual int	pgWrite (XrdSfsAio *, uint64_t)
virtual ssize_t	Read (off_t, size_t)
virtual ssize_t	Read (void *, off_t, size_t)
virtual int	Read (XrdSfsAio *)
virtual ssize_t	ReadRaw (void *, off_t, size_t)
virtual ssize_t	ReadV (XrdOucIOVec *readV, int n)
int	VerificationStatus ()
virtual ssize_t	Write (const void *, off_t, size_t)
virtual int	Write (XrdSfsAio *)
virtual ssize_t	WriteV (XrdOucIOVec *writeV, int n)
Public Member Functions inherited from XrdOssDFHandler
	XrdOssDFHandler (XrdOssDF *successor)
virtual	~XrdOssDFHandler ()
virtual int	Fchmod (mode_t Mode)
virtual int	Fctl (int cmd, int alen, const char *args, char **resp=0)
virtual const char *	getTID ()
virtual int	isCompressed (char *cxidp=0)
virtual int	Opendir (const char *dir_path, XrdOucEnv &Env)
virtual int	Readdir (char *buff, int blen)
virtual int	StatRet (struct stat *buff)
Public Member Functions inherited from XrdOssDF
	XrdOssDF (const char *tid="", uint16_t dftype=0, int fdnum=-1)
virtual	~XrdOssDF ()
virtual int	Clone (const std::vector< XrdOucCloneSeg > &cVec)
virtual int	Clone (XrdOssDF &srcFile)
uint16_t	DFType ()
virtual bool	getErrMsg (std::string &eText)
virtual ssize_t	Read (XrdOucRangeList &rlist)

Static Public Member Functions
static int	mapRelease (std::shared_ptr< puMapItem_t > &, XrdSysMutexHelper *plck=NULL)
static void	mapTake (const std::string &, std::shared_ptr< puMapItem_t > &, bool create=true)

Static Public Attributes
static std::unordered_map< std::string, std::shared_ptr< puMapItem_t > >	pumap_
static XrdSysMutex	pumtx_
Static Public Attributes inherited from XrdOssDF
static const uint16_t	DF_isDir = 0x0001
	Object is for a directory. More...
static const uint16_t	DF_isFile = 0x0002
	Object is for a file. More...
static const uint16_t	DF_isProxy = 0x0010
	Object is a proxy object. More...
static const uint64_t	doCalc = 0x4000000000000000ULL
	pgw: Calculate checksums More...
static const int	Fctl_ckpObj = 0
static const int	Fctl_QFinfo = 3
static const int	Fctl_setFD = 2
static const int	Fctl_utimes = 1
static const uint64_t	Verify = 0x8000000000000000ULL
	all: Verify checksums More...

Friends
class	XrdOssCsiFileAio
class	XrdOssCsiFileAioJob

Additional Inherited Members
Protected Attributes inherited from XrdOssDFHandler
XrdOssDF *	successor_
Protected Attributes inherited from XrdOssDF
uint16_t	dfType
int	fd
off_t	pgwEOF
short	rsvd
const char *	tident

Detailed Description

Definition at line 73 of file XrdOssCsi.hh.

Constructor & Destructor Documentation

XrdOssCsiFile()

XrdOssCsiFile::XrdOssCsiFile ( XrdOss *  parent, const char *  tid, XrdOssCsiConfig &  cf  )

inline

Definition at line 106 of file XrdOssCsi.hh.

                                                                                    :
                    XrdOssDFHandler(parent->newFile(tid)), parentOss_(parent), tident(tid), config_(cf),
                    rdonly_(false), aioCntCond_(0), aioCnt_(0), aioCntWaiters_(0) { }

~XrdOssCsiFile()

XrdOssCsiFile::~XrdOssCsiFile ( )

virtual

Definition at line 177 of file XrdOssCsiFile.cc.

{
   if (pmi_)
   {
      (void)Close();
   }
}

References Close().

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Member Function Documentation

aioDec()

void XrdOssCsiFile::aioDec ( )

inline

Definition at line 120 of file XrdOssCsi.hh.

        {
           XrdSysCondVarHelper lck(&aioCntCond_);
           if (--aioCnt_ == 0 && aioCntWaiters_>0)
              aioCntCond_.Broadcast();
        }

References XrdSysCondVar::Broadcast().

Referenced by XrdOssCsiFileAio::Recycle().

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aioInc()

void XrdOssCsiFile::aioInc ( )

inline

Definition at line 111 of file XrdOssCsi.hh.

        {
           XrdSysCondVarHelper lck(&aioCntCond_);
           while(aioCntWaiters_>0)
           {
              aioCntCond_.Wait();
           }
           ++aioCnt_;
        }

References XrdSysCondVar::Wait().

Referenced by XrdOssCsiFileAio::Init().

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aioWait()

void XrdOssCsiFile::aioWait ( )

inline

Definition at line 126 of file XrdOssCsi.hh.

        {
           XrdSysCondVarHelper lck(&aioCntCond_);
           ++aioCntWaiters_;
           while(aioCnt_>0)
           {
              aioCntCond_.Wait();
           }
           --aioCntWaiters_;
           aioCntCond_.Broadcast();
        }

References XrdSysCondVar::Broadcast(), and XrdSysCondVar::Wait().

Referenced by Close(), and Fsync().

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Close()

int XrdOssCsiFile::Close ( long long *  retsz = 0 )

virtual

Close a directory or file.

Parameters

retsz

If not nil, where the size of the file is to be returned.

Returns

0 upon success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 185 of file XrdOssCsiFile.cc.

{
   if (!pmi_)
   {
      return -EBADF;
   }
 
   // wait for any ongoing aios to finish
   aioWait();
 
   const int cpret = pageMapClose();
 
   const int csret = successor_->Close(retsz);
   if (cpret<0) return cpret;
   return csret;
}

References aioWait(), XrdOssDF::Close(), and XrdOssDFHandler::successor_.

Referenced by ~XrdOssCsiFile(), and Open().

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Flush()

void XrdOssCsiFile::Flush ( )

virtual

Flush filesystem cached pages for this file (used for checksums).

Reimplemented from XrdOssDFHandler.

Definition at line 597 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return;
 
   Pages()->Flush();
   successor_->Flush();
}

References XrdOssDF::Flush(), XrdOssCsiPages::Flush(), Pages(), and XrdOssDFHandler::successor_.

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Fstat()

int XrdOssCsiFile::Fstat ( struct stat *  buf )

virtual

Return state information for this file.

Parameters

buf	- Pointer to the structure where info it to be returned.

Returns

0 upon success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 574 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
   XrdOssCsiPages::Sizes_t sizes;
   const int tsret = Pages()->TrackedSizesGet(sizes, false);
   const int fsret = successor_->Fstat(buff);
   if (fsret<0) return fsret;
   if (tsret<0) return 0;
   buff->st_size = std::max(sizes.first, sizes.second);
   return 0;
}

References XrdOssDF::Fstat(), Pages(), XrdOssDFHandler::successor_, and XrdOssCsiPages::TrackedSizesGet().

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Fsync() [1/2]

int XrdOssCsiFile::Fsync ( void  )

virtual

Synchronize associated file with media (synchronous).

Returns

0 upon success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 541 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
 
   const int psret = Pages()->Fsync();
   const int ssret = successor_->Fsync();
   if (psret<0) return psret;
   return ssret;
}

References XrdOssDF::Fsync(), XrdOssCsiPages::Fsync(), Pages(), and XrdOssDFHandler::successor_.

Referenced by Fsync().

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Fsync() [2/2]

int XrdOssCsiFile::Fsync ( XrdSfsAio *  aiop )

virtual

Synchronize associated file with media (asynchronous).

Parameters

aiop	- Pointer to async I/O request object.

Returns

0 upon success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 115 of file XrdOssCsiFileAio.cc.

{
   aioWait();
   aiop->Result = this->Fsync();
   aiop->doneWrite();
   return 0;
}

References aioWait(), XrdSfsAio::doneWrite(), Fsync(), and XrdSfsAio::Result.

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Ftruncate()

int XrdOssCsiFile::Ftruncate ( unsigned long long  flen )

virtual

Set the size of the associated file.

Parameters

flen	- The new size of the file.

Returns

0 upon success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 551 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
   if (rdonly_) return -EBADF;
 
   XrdOssCsiRangeGuard rg;
   Pages()->LockTrackinglen(rg, flen, LLONG_MAX, false);
   int ret = Pages()->truncate(successor_, flen, rg);
   if (ret<0)
   {
      rg.ReleaseAll();
      resyncSizes();
      return ret;
   }
   ret = successor_->Ftruncate(flen);
   if (ret<0)
   {
      rg.ReleaseAll();
      resyncSizes();
   }
   return ret;
}

References XrdOssDF::Ftruncate(), XrdOssCsiPages::LockTrackinglen(), Pages(), XrdOssCsiRangeGuard::ReleaseAll(), XrdOssDFHandler::successor_, and XrdOssCsiPages::truncate().

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getFD()

virtual int XrdOssCsiFile::getFD ( )

inlinevirtual

Return the underlying file descriptor.

Returns

-1 if there is no file descriptor or a non-negative FD number.

Reimplemented from XrdOssDFHandler.

Definition at line 83 of file XrdOssCsi.hh.

{ return successor_->getFD(); }

References XrdOssDF::getFD(), and XrdOssDFHandler::successor_.

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getMmap()

virtual off_t XrdOssCsiFile::getMmap ( void **  addr )

inlinevirtual

Return the memory mapped characteristics of the file.

Parameters

addr	- Pointer to where the memory mapped address is to be returned.

Returns

If mapped, the size of the file is returned and it memory location is placed in addr. Otherwise, addr is set to zero and zero is returned. Note that zero length files cannot be memory mapped.

Reimplemented from XrdOssDFHandler.

Definition at line 82 of file XrdOssCsi.hh.

{ if (addr) *addr = 0; return 0; }

mapRelease()

int XrdOssCsiFile::mapRelease ( std::shared_ptr< puMapItem_t > &  pmi, XrdSysMutexHelper *  plck = NULL  )

static

Definition at line 108 of file XrdOssCsiFile.cc.

{
   XrdSysMutexHelper lck(pumtx_);
   pmi->refcount--;
   auto mapidx = pumap_.find(pmi->tpath);
   if (pmi->refcount == 0 || pmi->unlinked)
   {
      if (mapidx != pumap_.end() && mapidx->second == pmi)
      {
         pumap_.erase(mapidx);
      }
   }
   if (plck) plck->UnLock();
   return (pmi->refcount == 0) ? 1 : 0;
}

References pumap_, pumtx_, and XrdSysMutexHelper::UnLock().

Referenced by XrdOssCsi::Create(), XrdOssCsi::Rename(), and XrdOssCsi::Unlink().

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mapTake()

void XrdOssCsiFile::mapTake ( const std::string &  key, std::shared_ptr< puMapItem_t > &  pmi, bool  create = true  )

static

Definition at line 87 of file XrdOssCsiFile.cc.

{
   XrdSysMutexHelper lck(pumtx_);
   auto mapidx = pumap_.find(key);
   if (mapidx == pumap_.end())
   {
      if (!create) return;
      pmi.reset(new puMapItem_t());
      pmi->tpath = key;
      if (!key.empty())
      {
         pumap_.insert(std::make_pair(key, pmi));
      }
   }
   else
   {
      pmi = mapidx->second;
   }
   pmi->refcount++;
}

References pumap_, and pumtx_.

Referenced by XrdOssCsi::Create(), XrdOssCsi::Rename(), and XrdOssCsi::Unlink().

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Open()

int XrdOssCsiFile::Open ( const char *  path, int  Oflag, mode_t  Mode, XrdOucEnv &  env  )

virtual

Open a file.

Parameters

path	- Pointer to the path of the file to be opened.
Oflag	- Standard open flags.
Mode	- File open mode (ignored unless creating a file).
env	- Reference to environmental information.

Returns

0 upon success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 285 of file XrdOssCsiFile.cc.

{
   char cxid[4];
 
   if (pmi_)
   {
      // already open
      return -EINVAL;
   }
 
   if (!path)
   {
      return -EINVAL;
   }
   if (config_.tagParam_.isTagFile(path))
   {
      if ((Oflag & O_CREAT)) return -EACCES;
      return -ENOENT;
   }
 
   int dflags = Oflag;
   if ((dflags & O_ACCMODE) == O_WRONLY)
   {
      // for non-aligned writes it may be needed to do read-modify-write
      dflags &= ~O_ACCMODE;
      dflags |= O_RDWR;
   }
 
   rdonly_ = true;
   if ((dflags & O_ACCMODE) != O_RDONLY)
   {
      rdonly_ = false;
   }
 
   const int oret = pageAndFileOpen(path, dflags, Oflag, Mode, Env);
   if (oret<0)
   {
      return oret;
   }
 
   if (successor_->isCompressed(cxid)>0)
   {
      (void)Close();
      return -ENOTSUP;
   }
 
   if (Pages()->IsReadOnly() && !rdonly_)
   {
      (void)Close();
      return -EACCES;
   }
   return XrdOssOK;
}

References Close(), XrdOssDF::isCompressed(), XrdOssCsiPages::IsReadOnly(), TagPath::isTagFile(), Mode, Pages(), XrdOssDFHandler::successor_, XrdOssCsiConfig::tagParam_, and XrdOssOK.

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Pages()

XrdOssCsiPages* XrdOssCsiFile::Pages ( )

inline

Definition at line 140 of file XrdOssCsi.hh.

                                {
           return pmi_->pages.get();
        }

Referenced by XrdOssCsiFileAioJob::DoItRead1(), XrdOssCsiFileAioJob::DoItRead2(), XrdOssCsiFileAioJob::DoItWrite1(), Flush(), Fstat(), Fsync(), Ftruncate(), Open(), pgRead(), pgWrite(), Read(), ReadRaw(), ReadV(), VerificationStatus(), Write(), and WriteV().

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pgRead() [1/2]

ssize_t XrdOssCsiFile::pgRead ( void *  buffer, off_t  offset, size_t  rdlen, uint32_t *  csvec, uint64_t  opts  )

virtual

Reimplemented from XrdOssDFHandler.

Definition at line 474 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
 
   XrdOssCsiRangeGuard rg;
   Pages()->LockTrackinglen(rg, offset, offset+rdlen, true);
 
   // if we return a short amount of data the caller will have to deal with
   // joining csvec values from repeated reads: for simplicity try to read as
   // such as possible up to the request read length
   ssize_t toread = rdlen;
   ssize_t bread = 0;
   uint8_t *const p = (uint8_t*)buffer;
   do
   {
      ssize_t rret = successor_->Read(&p[bread], offset+bread, toread);
      if (rret<0) return rret;
      if (rret==0) break;
      toread -= rret;
      bread += rret;
   } while(toread>0);
   if (rdlen == 0) return bread;
 
   ssize_t puret = Pages()->FetchRange(successor_, buffer, offset, bread, csvec, opts, rg);
   if (puret<0) return puret;
   return bread;
}

References XrdOssCsiPages::FetchRange(), XrdOssCsiPages::LockTrackinglen(), opts, Pages(), XrdOssDF::Read(), and XrdOssDFHandler::successor_.

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pgRead() [2/2]

int XrdOssCsiFile::pgRead ( XrdSfsAio *  aioparm, uint64_t  opts  )

virtual

Read file pages and checksums using asynchronous I/O.

Parameters

aioparm	- Pointer to async I/O object controlling the I/O.
opts	- Processing options (see above).

Returns

0 upon if request started success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 81 of file XrdOssCsiFileAio.cc.

{
   if (!pmi_) return -EBADF;
 
   XrdOssCsiFileAio *nio = XrdOssCsiFileAio::Alloc(&aiostore_);
   nio->Init(aioparm, this, true, opts, true);
   nio->SchedReadJob();
   return 0;
}

References XrdOssCsiFileAio::Alloc(), XrdOssCsiFileAio::Init(), opts, and XrdOssCsiFileAio::SchedReadJob().

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pgWrite() [1/2]

ssize_t XrdOssCsiFile::pgWrite ( void *  buffer, off_t  offset, size_t  wrlen, uint32_t *  csvec, uint64_t  opts  )

virtual

Write file pages into a file with corresponding checksums.

Parameters

buffer	- pointer to buffer containing the bytes to write.
offset	- The offset where the write is to start.
wrlen	- The number of bytes to write.
csvec	- A vector which contains the corresponding CRC32 checksum for each page. See XrdOucPgrwUtils::csNum() for sizing.
opts	- Processing options (see above).

Returns

>= 0 The number of bytes written upon success. or -errno or -osserr upon failure. (see XrdOssError.hh).

< 0 -errno or -osserr upon failure. (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 502 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
   if (rdonly_) return -EBADF;
   uint64_t pgopts = opts;
 
   const int prec = XrdOssCsiPages::pgWritePrelockCheck(buffer, offset, wrlen, csvec, opts);
   if (prec < 0)
   {
      return prec;
   }
 
   XrdOssCsiRangeGuard rg;
   Pages()->LockTrackinglen(rg, offset, offset+wrlen, false);
 
   int puret = Pages()->StoreRange(successor_, buffer, offset, wrlen, csvec, pgopts, rg);
   if (puret<0) {
      rg.ReleaseAll();
      resyncSizes();
      return (ssize_t)puret;
   }
   ssize_t towrite = wrlen;
   ssize_t bwritten = 0;
   const uint8_t *p = (uint8_t*)buffer;
   do
   {
      ssize_t wret = successor_->Write(&p[bwritten], offset+bwritten, towrite);
      if (wret<0)
      {
         rg.ReleaseAll();
         resyncSizes();
         return wret;
      }
      towrite -= wret;
      bwritten += wret;
   } while(towrite>0);
   return bwritten;
}

References XrdOssCsiPages::LockTrackinglen(), opts, Pages(), XrdOssCsiPages::pgWritePrelockCheck(), XrdOssCsiRangeGuard::ReleaseAll(), XrdOssCsiPages::StoreRange(), XrdOssDFHandler::successor_, and XrdOssDF::Write().

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pgWrite() [2/2]

int XrdOssCsiFile::pgWrite ( XrdSfsAio *  aioparm, uint64_t  opts  )

virtual

Write file pages and checksums using asynchronous I/O.

Parameters

aioparm	- Pointer to async I/O object controlling the I/O.
opts	- Processing options (see above).

Returns

0 upon if request started success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 91 of file XrdOssCsiFileAio.cc.

{
   if (!pmi_) return -EBADF;
   if (rdonly_) return -EBADF;
   uint64_t pgopts = opts;
 
   const int prec = XrdOssCsiPages::pgWritePrelockCheck(
          (void *)aioparm->sfsAio.aio_buf,
          (off_t)aioparm->sfsAio.aio_offset,
          (size_t)aioparm->sfsAio.aio_nbytes,
          aioparm->cksVec,
          opts);
   if (prec < 0)
   {
      return prec;
   }
          
   XrdOssCsiFileAio *nio = XrdOssCsiFileAio::Alloc(&aiostore_);
   nio->Init(aioparm, this, true, pgopts, false);
   // pages will be locked when write is scheduled
   nio->SchedWriteJob();
   return 0;
}

References aiocb::aio_buf, aiocb::aio_nbytes, aiocb::aio_offset, XrdOssCsiFileAio::Alloc(), XrdSfsAio::cksVec, XrdOssCsiFileAio::Init(), opts, XrdOssCsiPages::pgWritePrelockCheck(), XrdOssCsiFileAio::SchedWriteJob(), and XrdSfsAio::sfsAio.

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Read() [1/3]

ssize_t XrdOssCsiFile::Read ( off_t  offset, size_t  size  )

virtual

Preread file blocks into the file system cache.

Parameters

offset	- The offset where the read is to start.
size	- The number of bytes to pre-read.

Returns

>= 0 When 0, the request was ignored; otherwise, it has been accepted.

< 0 Failed with -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 339 of file XrdOssCsiFile.cc.

{
   return successor_->Read(offset, blen);
}

References XrdOssDF::Read(), and XrdOssDFHandler::successor_.

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Read() [2/3]

ssize_t XrdOssCsiFile::Read ( void *  buffer, off_t  offset, size_t  size  )

virtual

Read file bytes into a buffer.

Parameters

buffer	- pointer to buffer where the bytes are to be placed.
offset	- The offset where the read is to start.
size	- The number of bytes to read.

Returns

>= 0 The number of bytes that placed in buffer.

< 0 -errno or -osserr upon failure (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 344 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
 
   XrdOssCsiRangeGuard rg;
   Pages()->LockTrackinglen(rg, offset, offset+blen, true);
 
   const ssize_t bread = successor_->Read(buff, offset, blen);
   if (bread<0 || blen==0) return bread;
 
   const ssize_t puret = Pages()->VerifyRange(successor_, buff, offset, bread, rg);
   if (puret<0) return puret;
   return bread;
}

References XrdOssCsiPages::LockTrackinglen(), Pages(), XrdOssDF::Read(), XrdOssDFHandler::successor_, and XrdOssCsiPages::VerifyRange().

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Read() [3/3]

int XrdOssCsiFile::Read ( XrdSfsAio *  aiop )

virtual

Read file bytes using asynchronous I/O.

Parameters

aiop	- Pointer to async I/O object controlling the I/O.

Returns

0 upon if request started success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 59 of file XrdOssCsiFileAio.cc.

{
   if (!pmi_) return -EBADF;
 
   XrdOssCsiFileAio *nio = XrdOssCsiFileAio::Alloc(&aiostore_);
   nio->Init(aiop, this, false, 0, true);
   nio->SchedReadJob();
   return 0;
}

References XrdOssCsiFileAio::Alloc(), XrdOssCsiFileAio::Init(), and XrdOssCsiFileAio::SchedReadJob().

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ReadRaw()

ssize_t XrdOssCsiFile::ReadRaw ( void *  buffer, off_t  offset, size_t  size  )

virtual

Read uncompressed file bytes into a buffer.

Parameters

buffer	- pointer to buffer where the bytes are to be placed.
offset	- The offset where the read is to start.
size	- The number of bytes to read.

Returns

>= 0 The number of bytes that placed in buffer.

< 0 -errno or -osserr upon failure (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 359 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
 
   XrdOssCsiRangeGuard rg;
   Pages()->LockTrackinglen(rg, offset, offset+blen, true);
 
   const ssize_t bread = successor_->ReadRaw(buff, offset, blen);
   if (bread<0 || blen==0) return bread;
 
   const ssize_t puret = Pages()->VerifyRange(successor_, buff, offset, bread, rg);
   if (puret<0) return puret;
   return bread;
}

References XrdOssCsiPages::LockTrackinglen(), Pages(), XrdOssDF::ReadRaw(), XrdOssDFHandler::successor_, and XrdOssCsiPages::VerifyRange().

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ReadV()

ssize_t XrdOssCsiFile::ReadV ( XrdOucIOVec *  readV, int  rdvcnt  )

virtual

Read file bytes as directed by the read vector.

Parameters

readV	pointer to the array of read requests.
rdvcnt	the number of elements in readV.

Returns

>=0 The numbe of bytes read.

< 0 -errno or -osserr upon failure (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 374 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
   if (n==0) return 0;
 
   XrdOssCsiRangeGuard rg;
   off_t start = readV[0].offset;
   off_t end = start + (off_t)readV[0].size;
   for(int i=1; i<n; i++)
   {
      const off_t p1 = readV[i].offset;
      const off_t p2 = p1 + (off_t)readV[i].size;
      if (p1<start) start = p1;
      if (p2>end) end = p2;
   }
   Pages()->LockTrackinglen(rg, start, end, true);
 
   // standard OSS gives -ESPIPE in case of partial read of an element
   ssize_t rret = successor_->ReadV(readV, n);
   if (rret<0) return rret;
   for (int i=0; i<n; i++)
   {
      if (readV[i].size == 0) continue;
      ssize_t puret = Pages()->VerifyRange(successor_, readV[i].data, readV[i].offset, readV[i].size, rg);
      if (puret<0) return puret;
   }
   return rret;
}

References XrdOssCsiPages::LockTrackinglen(), XrdOucIOVec::offset, Pages(), XrdOssDF::ReadV(), XrdOssDFHandler::successor_, and XrdOssCsiPages::VerifyRange().

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VerificationStatus()

int XrdOssCsiFile::VerificationStatus

(

)

Definition at line 605 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return 0;
   return Pages()->VerificationStatus();
}

References Pages(), and XrdOssCsiPages::VerificationStatus().

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Write() [1/2]

ssize_t XrdOssCsiFile::Write ( const void *  buffer, off_t  offset, size_t  size  )

virtual

Write file bytes from a buffer.

Parameters

buffer	- pointer to buffer where the bytes reside.
offset	- The offset where the write is to start.
size	- The number of bytes to write.

Returns

>= 0 The number of bytes that were written.

< 0 -errno or -osserr upon failure (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 403 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
   if (rdonly_) return -EBADF;
 
   XrdOssCsiRangeGuard rg;
   Pages()->LockTrackinglen(rg, offset, offset+blen, false);
 
   int puret = Pages()->UpdateRange(successor_, buff, offset, blen, rg);
   if (puret<0)
   {
      rg.ReleaseAll();
      resyncSizes();
      return (ssize_t)puret;
   }
   ssize_t towrite = blen;
   ssize_t bwritten = 0;
   const uint8_t *p = (uint8_t*)buff;
   while(towrite>0)
   {
      ssize_t wret = successor_->Write(&p[bwritten], offset+bwritten, towrite);
      if (wret<0)
      {
         rg.ReleaseAll();
         resyncSizes();
         return wret;
      }
      towrite -= wret;
      bwritten += wret;
   }
   return bwritten;
}

References XrdOssCsiPages::LockTrackinglen(), Pages(), XrdOssCsiRangeGuard::ReleaseAll(), XrdOssDFHandler::successor_, XrdOssCsiPages::UpdateRange(), and XrdOssDF::Write().

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Write() [2/2]

int XrdOssCsiFile::Write ( XrdSfsAio *  aiop )

virtual

Write file bytes using asynchronous I/O.

Parameters

aiop	- Pointer to async I/O object controlling the I/O.

Returns

0 upon if request started success or -errno or -osserr (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 69 of file XrdOssCsiFileAio.cc.

{
   if (!pmi_) return -EBADF;
   if (rdonly_) return -EBADF;
 
   XrdOssCsiFileAio *nio = XrdOssCsiFileAio::Alloc(&aiostore_);
   nio->Init(aiop, this, false, 0, false);
   // pages will be locked when write is scheduled
   nio->SchedWriteJob();
   return 0;
}

References XrdOssCsiFileAio::Alloc(), XrdOssCsiFileAio::Init(), and XrdOssCsiFileAio::SchedWriteJob().

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WriteV()

ssize_t XrdOssCsiFile::WriteV ( XrdOucIOVec *  writeV, int  wrvcnt  )

virtual

Write file bytes as directed by the write vector.

Parameters

writeV	pointer to the array of write requests.
wrvcnt	the number of elements in writeV.

Returns

>=0 The numbe of bytes read.

< 0 -errno or -osserr upon failure (see XrdOssError.hh).

Reimplemented from XrdOssDFHandler.

Definition at line 436 of file XrdOssCsiFile.cc.

{
   if (!pmi_) return -EBADF;
   if (rdonly_) return -EBADF;
   if (n==0) return 0;
 
   XrdOssCsiRangeGuard rg;
   off_t start = writeV[0].offset;
   off_t end = start + (off_t)writeV[0].size;
   for(int i=1; i<n; i++)
   {
      const off_t p1 = writeV[i].offset;
      const off_t p2 = p1 + (off_t)writeV[i].size;
      if (p1<start) start = p1;
      if (p2>end) end = p2;
   }
   Pages()->LockTrackinglen(rg, start, end, false);
 
   for (int i=0; i<n; i++)
   {
      int ret = Pages()->UpdateRange(successor_, writeV[i].data, writeV[i].offset, writeV[i].size, rg);
      if (ret<0)
      {
         rg.ReleaseAll();
         resyncSizes();
         return ret;
      }
   }
   // standard OSS gives -ESPIPE in case of partial write of an element
   ssize_t wret = successor_->WriteV(writeV, n);
   if (wret<0)
   {
      rg.ReleaseAll();
      resyncSizes();
   }
   return wret;
}

References XrdOssCsiPages::LockTrackinglen(), XrdOucIOVec::offset, Pages(), XrdOssCsiRangeGuard::ReleaseAll(), XrdOssDFHandler::successor_, XrdOssCsiPages::UpdateRange(), and XrdOssDF::WriteV().

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Friends And Related Function Documentation

XrdOssCsiFileAio

friend class XrdOssCsiFileAio

friend

Definition at line 75 of file XrdOssCsi.hh.

XrdOssCsiFileAioJob

friend class XrdOssCsiFileAioJob

friend

Definition at line 76 of file XrdOssCsi.hh.

Member Data Documentation

pumap_

std::unordered_map< std::string, std::shared_ptr< XrdOssCsiFile::puMapItem_t > > XrdOssCsiFile::pumap_

static

Definition at line 160 of file XrdOssCsi.hh.

Referenced by mapRelease(), mapTake(), and XrdOssCsi::Rename().

pumtx_

XrdSysMutex XrdOssCsiFile::pumtx_

static

Definition at line 159 of file XrdOssCsi.hh.

Referenced by mapRelease(), mapTake(), and XrdOssCsi::Rename().

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

• XrdOssCsi.hh
• XrdOssCsiFile.cc
• XrdOssCsiFileAio.cc