posix.c File Reference

A data backend to provide POSIX compatibility. More...

#include <dirent.h>
#include <errno.h>
#include <esdm-debug.h>
#include <esdm.h>
#include <fcntl.h>
#include <jansson.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <esdm-stream.h>
#include "posix.h"

Include dependency graph for posix.c:

Data Structures
struct	posix_stream_t

Macros
#define	_GNU_SOURCE   /* See feature_test_macros(7) */
#define	DEBUG_ENTER   ESDM_DEBUG_COM_FMT("POSIX", "", "")
#define	DEBUG(fmt, ...)   ESDM_DEBUG_COM_FMT("POSIX", fmt, __VA_ARGS__)
#define	WARN_ENTER   ESDM_WARN_COM_FMT("POSIX", "", "")
#define	WARN(fmt, ...)   ESDM_WARN_COM_FMT("POSIX", fmt, __VA_ARGS__)
#define	WARNS(fmt)   ESDM_WARN_COM_FMT("POSIX", "%s", fmt)
#define	sprintfFragmentDir(path, f)   (sprintf(path, "%s/%c/%c/%s/%c/%c", tgt, f->dataset->id[0], f->dataset->id[1], f->dataset->id+2, f->id[0], f->id[1]))
#define	sprintfFragmentPath(path, f)   (sprintf(path, "%s/%c/%c/%s/%c/%c/%s", tgt, f->dataset->id[0], f->dataset->id[1], f->dataset->id+2, f->id[0], f->id[1], f->id+2))

Functions
int	posix_finalize (esdm_backend_t *backend)
esdm_backend_t *	posix_backend_init (esdm_config_backend_t *config)

Detailed Description

A data backend to provide POSIX compatibility.

Function Documentation

posix_backend_init()

esdm_backend_t* posix_backend_init

(

esdm_config_backend_t *

config

)

Initializes the POSIX plugin. In particular this involves:

• Load configuration of this backend
• Load and potentially calibrate performance model
• Connect with support services e.g. for technical metadata
• Setup directory structures used by this POSIX specific backend
• Populate esdm_backend_t struct and callbacks required for registration

Returns

pointer to backend struct

posix_finalize()

int posix_finalize

(

esdm_backend_t *

backend

)

Finalize callback implementation called on ESDM shutdown.

This is the last chance for a backend to make outstanding changes persistent. This routine is also expected to clean up memory that is used by the backend.