XrdCephOssDir Class Reference

#include <XrdCephOssDir.hh>

Inheritance diagram for XrdCephOssDir:

Collaboration diagram for XrdCephOssDir:

Public Member Functions
	XrdCephOssDir (XrdCephOss *cephoss)
virtual	~XrdCephOssDir ()
virtual int	Opendir (const char *, XrdOucEnv &)
virtual int	Readdir (char *buff, int blen)
virtual int	Close (long long *retsz=0)
Public Member Functions inherited from XrdOssDF
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).
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)
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 ()

Private Attributes
DIR *	m_dirp
XrdCephOss *	m_cephOss

Additional Inherited Members
Static Public Attributes inherited from XrdOssDF
static const uint64_t	Verify = 0x8000000000000000ULL
	all: Verify checksums
static const uint64_t	doCalc = 0x4000000000000000ULL
	pgw: Calculate checksums
static const uint16_t	DF_isDir = 0x0001
	Object is for a directory.
static const uint16_t	DF_isFile = 0x0002
	Object is for a file.
static const uint16_t	DF_isProxy = 0x0010
	Object is a proxy object.
static const int	Fctl_ckpObj = 0
static const int	Fctl_utimes = 1
Protected Attributes inherited from XrdOssDF
const char *	tident
off_t	pgwEOF
int	fd
uint16_t	dfType
short	rsvd

Detailed Description

This class implements XrdOssDF interface for usage with a CEPH storage. It has a very restricted usage as the only valid path for opendir is '/'. The reason is that ceph is an object store where you can only list all objects, and that has no notion of hierarchy

This plugin is able to use any pool of ceph with any userId. There are several ways to provide the pool and userId to be used for a given operation. Here is the ordered list of possibilities. First one defined wins :

• the path can be prepended with userId and pool. Syntax is : [[userId@]pool:]<actual path>
• the XrdOucEnv parameter, when existing, can have 'cephUserId' and/or 'cephPool' entries
• the ofs.osslib directive can provide an argument with format : [userID@]pool
• default are 'admin' and 'default' for userId and pool respectively

Note that the definition of a default via the ofs.osslib directive may clash with one used in a ofs.xattrlib directive. In case both directives have a default and they are different, the behavior is not defined. In case one of the two only has a default, it will be applied for both plugins.

Constructor & Destructor Documentation

XrdCephOssDir()

XrdCephOssDir::XrdCephOssDir

(

XrdCephOss *

cephoss

)

~XrdCephOssDir()

virtual XrdCephOssDir::~XrdCephOssDir ( )

inlinevirtual

Member Function Documentation

Close()

virtual int XrdCephOssDir::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).

Implements XrdOssDF.

Opendir()

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

virtual

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 from XrdOssDF.

Readdir()

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

virtual

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 from XrdOssDF.

Member Data Documentation

m_cephOss

XrdCephOss* XrdCephOssDir::m_cephOss

private

m_dirp

DIR* XrdCephOssDir::m_dirp

private

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

• XrdCephOssDir.hh