shss.c File Reference

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

Go to the source code of this file.

Data Structures
struct	shss_descriptor

Macros
#define	SHSS_LIB_VER_STR   "1.0"
#define	SHSS_LIB_NAME   "shss"
#define	SHSS_SO_NAME   "libshss" LIBERASURECODE_SO_SUFFIX ".so.1"
#define	DEFAULT_W   128
#define	METADATA   32

Typedefs
typedef int(*	shss_encode_func) (char **, size_t, int, int, int, int, long long *)
typedef int(*	shss_decode_func) (char **, size_t, int *, int, int, int, int, int, long long *)
typedef int(*	shss_reconstruct_func) (char **, size_t, int *, int, int *, int, int, int, int, int, long long *)

Functions
static int	shss_encode (void *desc, char **data, char **parity, int blocksize)
static int	shss_decode (void *desc, char **data, char **parity, int *missing_idxs, int blocksize)
static int	shss_reconstruct (void *desc, char **data, char **parity, int *missing_idxs, int destination_idx, int blocksize)
static int	shss_fragments_needed (void *desc, int *missing_idxs, int *fragments_to_exclude, int *fragments_needed)
static int	shss_element_size (void *desc)
	Return the element-size, which is the number of bits stored on a given device, per codeword.
static void *	shss_init (struct ec_backend_args *args, void *backend_sohandle)
static int	shss_exit (void *desc)
static bool	shss_is_compatible_with (uint32_t version)
static size_t	shss_get_backend_metadata_size (void *desc, int blocksize)

Variables
struct ec_backend	shss
struct ec_backend_op_stubs	shss_ops
struct ec_backend_common	backend_shss
struct ec_backend_op_stubs	shss_op_stubs

Macro Definition Documentation

DEFAULT_W

#define DEFAULT_W   128

Definition at line 70 of file shss.c.

METADATA

#define METADATA   32

Definition at line 71 of file shss.c.

Referenced by shss_get_backend_metadata_size().

SHSS_LIB_NAME

#define SHSS_LIB_NAME   "shss"

Definition at line 64 of file shss.c.

SHSS_LIB_VER_STR

#define SHSS_LIB_VER_STR   "1.0"

Definition at line 63 of file shss.c.

SHSS_SO_NAME

#define SHSS_SO_NAME   "libshss" LIBERASURECODE_SO_SUFFIX ".so.1"

Definition at line 68 of file shss.c.

Typedef Documentation

shss_decode_func

typedef int(* shss_decode_func) (char **, size_t, int *, int, int, int, int, int, long long *)

Definition at line 46 of file shss.c.

shss_encode_func

typedef int(* shss_encode_func) (char **, size_t, int, int, int, int, long long *)

Definition at line 45 of file shss.c.

shss_reconstruct_func

typedef int(* shss_reconstruct_func) (char **, size_t, int *, int, int *, int, int, int, int, int, long long *)

Definition at line 47 of file shss.c.

Function Documentation

shss_decode()

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

static

Definition at line 104 of file shss.c.

References shss_descriptor::aes_bit_length, shss_descriptor::k, shss_descriptor::m, shss_descriptor::n, and shss_descriptor::ssdecode.

shss_element_size()

int shss_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 210 of file shss.c.

References DEFAULT_W.

shss_encode()

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

static

Definition at line 73 of file shss.c.

References shss_descriptor::aes_bit_length, shss_descriptor::k, shss_descriptor::m, shss_descriptor::n, and shss_descriptor::ssencode.

shss_exit()

int shss_exit ( void * desc )

static

Definition at line 277 of file shss.c.

shss_fragments_needed()

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

static

Definition at line 180 of file shss.c.

References shss_descriptor::k, and shss_descriptor::n.

shss_get_backend_metadata_size()

size_t shss_get_backend_metadata_size ( void * desc, int blocksize )

static

Definition at line 289 of file shss.c.

References METADATA.

shss_init()

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

static

Definition at line 215 of file shss.c.

References shss_descriptor::aes_bit_length, DEFAULT_W, shss_descriptor::k, shss_descriptor::m, shss_descriptor::n, shss_descriptor::ssdecode, shss_descriptor::ssencode, shss_descriptor::ssreconst, and shss_descriptor::w.

shss_is_compatible_with()

bool shss_is_compatible_with ( uint32_t version )

static

Definition at line 285 of file shss.c.

References backend_shss.

shss_reconstruct()

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

static

Definition at line 141 of file shss.c.

References shss_descriptor::aes_bit_length, shss_descriptor::k, shss_descriptor::m, shss_descriptor::n, and shss_descriptor::ssreconst.

Variable Documentation

backend_shss

struct ec_backend_common backend_shss

Initial value:

                       = {
    .id                         = EC_BACKEND_SHSS,
    .name                       = SHSS_LIB_NAME,
    .soname                     = SHSS_SO_NAME,
    .soversion                  = SHSS_LIB_VER_STR,
    .ops                        = &shss_op_stubs,
}

Definition at line 43 of file shss.c.

Referenced by shss_is_compatible_with().

shss

struct ec_backend shss

Definition at line 41 of file shss.c.

shss_op_stubs

struct ec_backend_op_stubs shss_op_stubs

Initial value:

                         = {
    .INIT                       = shss_init,
    .EXIT                       = shss_exit,
    .ENCODE                     = shss_encode,
    .DECODE                     = shss_decode,
    .FRAGSNEEDED                = shss_fragments_needed,
    .RECONSTRUCT                = shss_reconstruct,
    .ELEMENTSIZE                = shss_element_size,
    .ISCOMPATIBLEWITH           = shss_is_compatible_with,
    .GETMETADATASIZE            = shss_get_backend_metadata_size,
    .GETENCODEOFFSET            = get_encode_offset_zero,
}

Definition at line 293 of file shss.c.

shss_ops

struct ec_backend_op_stubs shss_ops

Definition at line 42 of file shss.c.