#include <XrdOss.hh>

Inheritance diagram for XrdOssDF:

Public Member Functions
virtual int	Opendir (const char *path, XrdOucEnv &env)

virtual int	Readdir (char *buff, int blen)

virtual int	StatRet (struct stat *buff)

virtual int	Fchmod (mode_t mode)

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

virtual int	Fstat (struct stat *buf)

virtual int	Fsync ()

virtual int	Fsync (XrdSfsAio *aiop)

virtual int	Ftruncate (unsigned long long flen)

virtual off_t	getMmap (void **addr)

virtual int	isCompressed (char *cxidp=0)

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

virtual ssize_t	pgRead (void buffer, off_t offset, size_t rdlen, uint32_t csvec, uint64_t opts)

virtual int	pgRead (XrdSfsAio *aioparm, uint64_t opts)

virtual ssize_t	pgWrite (void buffer, off_t offset, size_t wrlen, uint32_t csvec, uint64_t opts)

virtual int	pgWrite (XrdSfsAio *aioparm, uint64_t opts)

virtual ssize_t	Read (off_t offset, size_t size)

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

virtual int	Read (XrdSfsAio *aiop)

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

virtual ssize_t	ReadV (XrdOucIOVec *readV, int rdvcnt)

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

virtual int	Write (XrdSfsAio *aiop)

virtual ssize_t	WriteV (XrdOucIOVec *writeV, int wrvcnt)

virtual int	Close (long long *retsz=0)=0

uint16_t	DFType ()

virtual int	Fctl (int cmd, int alen, const char args, char *resp=0)

virtual int	getFD ()

virtual const char *	getTID ()

	XrdOssDF (const char *tid="", uint16_t dftype=0, int fdnum=-1)

virtual	~XrdOssDF ()

Static Public Attributes
static const uint64_t	Verify = 0x8000000000000000ULL
	all: Verify checksums More...

static const uint64_t	doCalc = 0x4000000000000000ULL
	pgw: Calculate checksums More...

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 int	Fctl_ckpObj = 0

static const int	Fctl_utimes = 1

Protected Attributes
const char *	tident

off_t	pgwEOF

int	fd

uint16_t	dfType

short	rsvd

Detailed Description

This class defines the object that handles directory as well as file oriented requests. It is instantiated for each file/dir to be opened. The object is obtained by calling newDir() or newFile() in class XrdOss. This allows flexibility on how to structure an oss plugin.

Constructor & Destructor Documentation

XrdOssDF::XrdOssDF	(	const char *	tid = `""`,
		uint16_t	dftype = `0`,
		int	fdnum = `-1`
	)

inline

Constructor and Destructor

Parameters

tid	- Pointer to the trace identifier.
dftype	- The type of the object.
fdnum	- The value for the file descriptor.

virtual XrdOssDF::~XrdOssDF ( )

inlinevirtual

Member Function Documentation

virtual int XrdOssDF::Close ( long long * retsz = 0 )

pure 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).

Implemented in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, XrdOssDFHandler, XrdCephOssDir, XrdCephOssFile, XrdOssDir, and XrdPssDir.

Referenced by XrdOssDFHandler::Close(), and XrdOssWrapDF::Close().

uint16_t XrdOssDF::DFType ( )

inline

References dfType.

Referenced by XrdOssWrapDF::DFType().

virtual int XrdOssDF::Fchmod ( mode_t mode )

inlinevirtual

Change file mode settings.

Parameters

mode	- The new file mode setting.

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

Reimplemented in XrdOssWrapDF, XrdOssFile, XrdPssFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Fchmod(), and XrdOssWrapDF::Fchmod().

virtual int XrdOssDF::Fctl	(	int	cmd,
		int	alen,
		const char *	args,
		char **	resp = `0`
	)

virtual

Reimplemented in XrdOssWrapDF, XrdOssFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Fctl(), and XrdOssWrapDF::Fctl().

virtual void XrdOssDF::Flush ( )

inlinevirtual

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

Reimplemented in XrdOssWrapDF, XrdOssFile, XrdOssCsiFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Flush(), and XrdOssWrapDF::Flush().

virtual int XrdOssDF::Fstat ( struct stat * buf )

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdOssCsiFile, XrdPssFile, XrdCephOssFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Fstat(), and XrdOssWrapDF::Fstat().

virtual int XrdOssDF::Fsync ( void )

inlinevirtual

Synchronize associated file with media (synchronous).

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

Reimplemented in XrdOssWrapDF, XrdOssFile, XrdOssCsiFile, XrdPssFile, XrdCephOssFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Fsync(), and XrdOssWrapDF::Fsync().

virtual int XrdOssDF::Fsync ( XrdSfsAio * aiop )

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdOssCsiFile, XrdPssFile, and XrdOssDFHandler.

virtual int XrdOssDF::Ftruncate ( unsigned long long flen )

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdOssCsiFile, XrdPssFile, XrdCephOssFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Ftruncate(), and XrdOssWrapDF::Ftruncate().

virtual int XrdOssDF::getFD ( )

inlinevirtual

Return the underlying file descriptor.

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

Reimplemented in XrdOssWrapDF, XrdOssFile, XrdOssCsiFile, XrdOssDir, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::getFD(), and XrdOssWrapDF::getFD().

virtual off_t XrdOssDF::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 in XrdOssWrapDF, XrdOssFile, XrdOssCsiFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::getMmap(), and XrdOssWrapDF::getMmap().

virtual const char* XrdOssDF::getTID ( )

inlinevirtual

Return trace identifier associated with this object.

Returns: Pointer to trace identifier

Reimplemented in XrdOssWrapDF, and XrdOssDFHandler.

References tident.

Referenced by XrdOssDFHandler::getTID(), and XrdOssWrapDF::getTID().

virtual int XrdOssDF::isCompressed ( char * cxidp = 0 )

inlinevirtual

Return file compression charectistics.

Parameters

cxidp - Pointer to where the compression algorithm name returned.

Returns: If the file is compressed, the region size if returned. Otherwise, zero is returned (file not compressed).

Reimplemented in XrdOssWrapDF, XrdOssFile, and XrdOssDFHandler.

References nlohmann::detail::void().

Referenced by XrdOssDFHandler::isCompressed(), and XrdOssWrapDF::isCompressed().

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

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, XrdCephOssFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Open(), and XrdOssWrapDF::Open().

virtual int XrdOssDF::Opendir	(	const char *	path,
		XrdOucEnv &	env
	)

inlinevirtual

Open a directory.

Parameters

path	- Pointer to the path of the directory to be opened.
env	- Reference to environmental information.

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

Reimplemented in XrdOssWrapDF, XrdOssCsiDir, XrdCephOssDir, XrdOssDir, XrdPssDir, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Opendir(), and XrdOssWrapDF::Opendir().

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

virtual

Reimplemented in XrdOssWrapDF, XrdOssCsiFile, XrdPssFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::pgRead(), and XrdOssWrapDF::pgRead().

virtual int XrdOssDF::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 in XrdOssWrapDF, XrdOssCsiFile, XrdPssFile, and XrdOssDFHandler.

virtual ssize_t XrdOssDF::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 in XrdOssWrapDF, XrdOssCsiFile, XrdPssFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::pgWrite(), and XrdOssWrapDF::pgWrite().

virtual int XrdOssDF::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 in XrdOssWrapDF, XrdOssCsiFile, XrdPssFile, and XrdOssDFHandler.

virtual ssize_t XrdOssDF::Read	(	off_t	offset,
		size_t	size
	)

inlinevirtual

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

Reimplemented in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, XrdOssDFHandler, and XrdCephOssFile.

Referenced by XrdOssCsiFileAioJob::DoItRead1(), XrdOssCsiFileAioJob::DoItRead2(), XrdOssCsiTagstoreFile::fullread(), XrdOssCsiPages::maxread(), XrdOssDFHandler::Read(), and XrdOssWrapDF::Read().

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

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, XrdOssDFHandler, and XrdCephOssFile.

virtual int XrdOssDF::Read ( XrdSfsAio * aiop )

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, XrdOssDFHandler, and XrdCephOssFile.

References nlohmann::detail::void().

virtual int XrdOssDF::Readdir	(	char *	buff,
		int	blen
	)

inlinevirtual

Get the next directory entry.

Parameters

buff	- Pointer to buffer where a null terminated string of the entry name is to be returned. If no more entries exist, a null string is returned.
blen	- Length of the buffer.

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

Reimplemented in XrdOssWrapDF, XrdOssCsiDir, XrdCephOssDir, XrdOssDir, XrdPssDir, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::Readdir(), and XrdOssWrapDF::Readdir().

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

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, XrdOssDFHandler, and XrdCephOssFile.

Referenced by XrdOssDFHandler::ReadRaw(), and XrdOssWrapDF::ReadRaw().

virtual ssize_t XrdOssDF::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 in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::ReadV(), and XrdOssWrapDF::ReadV().

virtual int XrdOssDF::StatRet ( struct stat * buff )

inlinevirtual

Set the stat() buffer where stat information is to be placed corresponding to the directory entry returned by Readdir().

Parameters

buff	- Pointer to stat structure to be used.

Returns: 0 upon success or -ENOTSUP if not supported.

Note: This is a one-time call as stat structure is reused for each Readdir.; When StatRet() is in effect, directory entries that have been deleted from the target directory are quietly skipped.

Reimplemented in XrdOssWrapDF, XrdOssDir, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::StatRet(), and XrdOssWrapDF::StatRet().

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

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, XrdOssDFHandler, and XrdCephOssFile.

Referenced by XrdOssCsiFileAioJob::DoItWrite1(), XrdOssCsiFileAioJob::DoItWrite2(), XrdOssCsiTagstoreFile::fullwrite(), XrdOssDFHandler::Write(), and XrdOssWrapDF::Write().

virtual int XrdOssDF::Write ( XrdSfsAio * aiop )

inlinevirtual

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 in XrdOssWrapDF, XrdOssFile, XrdPssFile, XrdOssCsiFile, XrdOssDFHandler, and XrdCephOssFile.

References nlohmann::detail::void().

virtual ssize_t XrdOssDF::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 in XrdOssWrapDF, XrdOssCsiFile, and XrdOssDFHandler.

Referenced by XrdOssDFHandler::WriteV(), and XrdOssWrapDF::WriteV().

Member Data Documentation

const uint16_t XrdOssDF::DF_isDir = 0x0001

static

Object is for a directory.

Return the underlying object type.

Returns: Type of object.

const uint16_t XrdOssDF::DF_isFile = 0x0002

static

Object is for a file.

const uint16_t XrdOssDF::DF_isProxy = 0x0010

static

Object is a proxy object.

uint16_t XrdOssDF::dfType

protected

Referenced by DFType().

const uint64_t XrdOssDF::doCalc = 0x4000000000000000ULL

static

pgw: Calculate checksums

const int XrdOssDF::Fctl_ckpObj = 0

static

Execute a special operation on the directory or file.

Parameters

cmd	- The operation to be performed: Fctl_ckpObj - Obtain checkpoint object for proxy file. Argument: None. Response: Pointer to XrdOucChkPnt object. Fctl_utimes - Set atime and mtime (no response). Argument: struct timeval tv[2]
alen	- Length of data pointed to by args.
args	- Data sent with request, zero if alen is zero.
resp	- Where the response is to be set. The caller must call delete on the returned object.

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

const int XrdOssDF::Fctl_utimes = 1

static

int XrdOssDF::fd

protected

Referenced by XrdOssDir::getFD(), XrdOssFile::getFD(), XrdOssDir::XrdOssDir(), XrdOssFile::~XrdOssFile(), and XrdPssFile::~XrdPssFile().

off_t XrdOssDF::pgwEOF

protected

short XrdOssDF::rsvd

protected

const char* XrdOssDF::tident

protected

Referenced by getTID().

const uint64_t XrdOssDF::Verify = 0x8000000000000000ULL

static

all: Verify checksums

Read file pages into a buffer and return corresponding checksums.

Parameters

buffer	- pointer to buffer where the bytes are to be placed.
offset	- The offset where the read is to start. It must be page aligned.
rdlen	- The number of bytes to read. The amount must be an integral number of XrdSfsPage::Size bytes.
csvec	- A vector of entries to be filled with the cooresponding CRC32C checksum for each page. It must be size to rdlen/XrdSys::PageSize + (rdlenXrdSys::PageSize != 0)
opts	- Processing options (see below).

Returns: >= 0 The number of bytes that placed in buffer upon success.; < 0 -errno or -osserr upon failure. (see XrdOssError.hh).

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

XrdOss.hh

Public Member Functions

Static Public Attributes

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation