XrdOfsCPFile Class Reference

#include <XrdOfsCPFile.hh>

Classes
class	rInfo

Public Member Functions
int	Append (const char *data, off_t offset, int dlen)
int	Create (const char *lfn, struct stat &Stat)
int	Destroy ()
int	ErrState ()
const char *	FName (bool trim=false)
bool	isActive ()
bool	Reserve (int dlen, int nseg)
int	RestoreInfo (rInfo &rinfo, const char *&ewhy)
int	Sync ()
int	Used (int nseg=0)
	XrdOfsCPFile (const char *cfn=0)
	~XrdOfsCPFile ()
	Destructor. More...

Static Public Member Functions
static char *	Target (const char *ckpfn)

Static Private Member Functions
static char *	genCkpPath ()
static int	getSrcLfn (const char *cFN, rInfo &rinfo, int fd, int rc)

Private Attributes
char *	ckpFN
int	ckpFD
int	ckpDLen
int	ckpSize

Constructor & Destructor Documentation

XrdOfsCPFile::XrdOfsCPFile

(

const char *

cfn = 0

)

Constructor

Parameters

cfn	- Pointer to the name of the checkpoint file to use. When supplied, creates are prohibited.

XrdOfsCPFile::~XrdOfsCPFile

(

)

Destructor.

Member Function Documentation

int XrdOfsCPFile::Append	(	const char *	data,
		off_t	offset,
		int	dlen
	)

Append data to the checkpoint. Appends should be followed by Sync().

Parameters

data	- Pointer to the data to be recorded.
offset	- Offset in the source file where data came from.
dlen	- Length of the data.

Returns

0 upon success and -errno upon failure.

int XrdOfsCPFile::Create	(	const char *	lfn,
		struct stat &	Stat
	)

Create a checkpoint

Parameters

lfn	- Pointer to the name of the source file being checkpointed.
Stat	- Reference to source file stat information.

Returns

0 upon success and -errno upon failure.

int XrdOfsCPFile::Destroy

(

)

Destroy a checkpoint

Returns

0 upon success and -errno upon failure.

int XrdOfsCPFile::ErrState

(

)

Place checkpoint file in error state.

Returns

0 upon success and -errno upon failure.

const char* XrdOfsCPFile::FName

(

bool

trim = false

)

Get the checkpoint file name.

Returns

pointer to the checkpoint file name. The pointer will be "???" if there is no checkpoint file established.

static char* XrdOfsCPFile::genCkpPath ( )

staticprivate

static int XrdOfsCPFile::getSrcLfn ( const char *  cFN, rInfo &  rinfo, int  fd, int  rc  )

staticprivate

bool XrdOfsCPFile::isActive ( )

inline

Check if checpoint is established.

Returns

True if checkpoint has been established and false otherwise.

References ckpFN.

bool XrdOfsCPFile::Reserve	(	int	dlen,
		int	nseg
	)

Reserve space for a subsequent checkpoint.

Parameters

dlen	- the number of bytes that will be writen.
nseg	- the number of segements that will be written.

Returns

True upon success and false otherwise

int XrdOfsCPFile::RestoreInfo	(	rInfo &	rinfo,
		const char *&	ewhy
	)

int XrdOfsCPFile::Sync

(

)

Commit data to media.

Returns

0 upon success and -errno upon failure.

static char* XrdOfsCPFile::Target ( const char *  ckpfn )

static

Get the name of the source file associated with a checkpoint file.

Parameters

ckpfn

- Pointer to the name of the checkpoint file to use.

Returns

pointer to either the source file name or reason it's not valid.

int XrdOfsCPFile::Used

(

int

nseg = 0

)

Get the curent size of the checkpoint file.

Parameters

nseg	- the number of future segments to account for.

Returns

The size of the file in bytes.

Member Data Documentation

int XrdOfsCPFile::ckpDLen

private

int XrdOfsCPFile::ckpFD

private

char* XrdOfsCPFile::ckpFN

private

Referenced by isActive().

int XrdOfsCPFile::ckpSize

private

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

• XrdOfsCPFile.hh