1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
/*
Copyright (c) 2012-2015 DataLab, s.l. <http://www.datalab.es>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef __EC_METHOD_H__
#define __EC_METHOD_H__
#include <glusterfs/xlator.h>
#include "ec-types.h"
#include "ec-galois.h"
#define EC_GF_BITS 8
#define EC_GF_MOD 0x11D
#define EC_GF_SIZE (1 << EC_GF_BITS)
/* Determines the maximum size of the matrix used to encode/decode data */
#define EC_METHOD_MAX_FRAGMENTS 16
/* Determines the maximum number of usable elements in the Galois Field */
#define EC_METHOD_MAX_NODES (EC_GF_SIZE - 1)
#define EC_METHOD_WORD_SIZE 64
#define EC_METHOD_CHUNK_SIZE (EC_METHOD_WORD_SIZE * EC_GF_BITS)
int32_t
ec_method_init(xlator_t *xl, ec_matrix_list_t *list, uint32_t columns,
uint32_t rows, uint32_t max, const char *gen);
void
ec_method_fini(ec_matrix_list_t *list);
int32_t
ec_method_update(xlator_t *xl, ec_matrix_list_t *list, const char *gen);
void
ec_method_encode(ec_matrix_list_t *list, uint64_t size, void *in, void **out);
int32_t
ec_method_decode(ec_matrix_list_t *list, uint64_t size, uintptr_t mask,
uint32_t *rows, void **in, void *out);
#endif /* __EC_METHOD_H__ */
|
