null.c File Reference

#include <stdio.h>
#include <stdlib.h>
#include "erasurecode.h"
#include "erasurecode_backend.h"

Go to the source code of this file.

Data Structures
struct	null_descriptor

Macros
#define	NULL_LIB_MAJOR   1
#define	NULL_LIB_MINOR   0
#define	NULL_LIB_REV   0
#define	NULL_LIB_VER_STR   "1.0"
#define	NULL_LIB_NAME   "null"
#define	NULL_SO_NAME   "libnullcode" LIBERASURECODE_SO_SUFFIX ".so.1"
#define	DEFAULT_W   32

Typedefs
typedef void *(*	init_null_code_func) (int, int, int)
typedef int(*	null_code_encode_func) (void *, char **, char **, int)
typedef int(*	null_code_decode_func) (void *, char **, char **, int *, int, int)
typedef int(*	null_reconstruct_func) (char **, int, uint64_t, int, char *)
typedef int(*	null_code_fragments_needed_func) (void *, int *, int *, int *)

Functions
static int	null_encode (void *desc, char **data, char **parity, int blocksize)
static int	null_decode (void *desc, char **data, char **parity, int *missing_idxs, int blocksize)
static int	null_reconstruct (void *desc, char **data, char **parity, int *missing_idxs, int destination_idx, int blocksize)
static int	null_min_fragments (void *desc, int *missing_idxs, int *fragments_to_exclude, int *fragments_needed)
static int	null_element_size (void *desc)
	Return the element-size, which is the number of bits stored on a given device, per codeword.
static void *	null_init (struct ec_backend_args *args, void *backend_sohandle)
static int	null_exit (void *desc)
static bool	null_is_compatible_with (uint32_t version)

Variables
struct ec_backend	null
struct ec_backend_op_stubs	null_ops
struct ec_backend_op_stubs	null_op_stubs
struct ec_backend_common	backend_null

Macro Definition Documentation

DEFAULT_W

#define DEFAULT_W   32

Definition at line 77 of file null.c.

NULL_LIB_MAJOR

#define NULL_LIB_MAJOR   1

Definition at line 34 of file null.c.

NULL_LIB_MINOR

#define NULL_LIB_MINOR   0

Definition at line 35 of file null.c.

NULL_LIB_NAME

#define NULL_LIB_NAME   "null"

Definition at line 38 of file null.c.

NULL_LIB_REV

#define NULL_LIB_REV   0

Definition at line 36 of file null.c.

NULL_LIB_VER_STR

#define NULL_LIB_VER_STR   "1.0"

Definition at line 37 of file null.c.

NULL_SO_NAME

#define NULL_SO_NAME   "libnullcode" LIBERASURECODE_SO_SUFFIX ".so.1"

Definition at line 42 of file null.c.

Typedef Documentation

init_null_code_func

typedef void *(* init_null_code_func) (int, int, int)

Definition at line 48 of file null.c.

null_code_decode_func

typedef int(* null_code_decode_func) (void *, char **, char **, int *, int, int)

Definition at line 50 of file null.c.

null_code_encode_func

typedef int(* null_code_encode_func) (void *, char **, char **, int)

Definition at line 49 of file null.c.

null_code_fragments_needed_func

typedef int(* null_code_fragments_needed_func) (void *, int *, int *, int *)

Definition at line 52 of file null.c.

null_reconstruct_func

typedef int(* null_reconstruct_func) (char **, int, uint64_t, int, char *)

Definition at line 51 of file null.c.

Function Documentation

null_decode()

int null_decode ( void * desc, char ** data, char ** parity, int * missing_idxs, int blocksize )

static

Definition at line 84 of file null.c.

null_element_size()

int null_element_size ( void * desc )

static

Return the element-size, which is the number of bits stored on a given device, per codeword.

This is usually just 'w'.

Definition at line 107 of file null.c.

References DEFAULT_W.

null_encode()

int null_encode ( void * desc, char ** data, char ** parity, int blocksize )

static

Definition at line 79 of file null.c.

null_exit()

int null_exit ( void * desc )

static

Definition at line 206 of file null.c.

null_init()

void * null_init ( struct ec_backend_args * args, void * backend_sohandle )

static

Definition at line 112 of file null.c.

References null_descriptor::arg1, DEFAULT_W, null_descriptor::init_null_code, null_descriptor::k, null_descriptor::m, null_descriptor::null_code_decode, null_descriptor::null_code_encode, null_descriptor::null_code_fragments_needed, null_descriptor::null_reconstruct, and null_descriptor::w.

null_is_compatible_with()

bool null_is_compatible_with ( uint32_t version )

static

Definition at line 214 of file null.c.

null_min_fragments()

int null_min_fragments ( void * desc, int * missing_idxs, int * fragments_to_exclude, int * fragments_needed )

static

Definition at line 96 of file null.c.

null_reconstruct()

int null_reconstruct ( void * desc, char ** data, char ** parity, int * missing_idxs, int destination_idx, int blocksize )

static

Definition at line 90 of file null.c.

Variable Documentation

backend_null

struct ec_backend_common backend_null

Initial value:

                       = {
    .id                         = EC_BACKEND_NULL,
    .name                       = NULL_LIB_NAME,
    .soname                     = NULL_SO_NAME,
    .soversion                  = NULL_LIB_VER_STR,
    .ops                        = &null_op_stubs,
    .ec_backend_version         = _VERSION(NULL_LIB_MAJOR, NULL_LIB_MINOR,
                                           NULL_LIB_REV),
}

Definition at line 231 of file null.c.

null

struct ec_backend null

Definition at line 45 of file null.c.

null_op_stubs

struct ec_backend_op_stubs null_op_stubs

Initial value:

                         = {
    .INIT                       = null_init,
    .EXIT                       = null_exit,
    .ENCODE                     = null_encode,
    .DECODE                     = null_decode,
    .FRAGSNEEDED                = null_min_fragments,
    .RECONSTRUCT                = null_reconstruct,
    .ELEMENTSIZE                = null_element_size,
    .ISCOMPATIBLEWITH           = null_is_compatible_with,
    .GETMETADATASIZE            = get_backend_metadata_size_zero,
    .GETENCODEOFFSET            = get_encode_offset_zero,
}

Definition at line 218 of file null.c.

null_ops

struct ec_backend_op_stubs null_ops

Definition at line 46 of file null.c.