erasure.h

Go to the documentation of this file.

/*
 * This file is part of the Aaru Data Preservation Suite.
 * Copyright (c) 2019-2026 Natalia Portillo.
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of the
 * License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef LIBAARUFORMAT_ERASURE_H
#define LIBAARUFORMAT_ERASURE_H
 
#include <stdint.h>
 
#pragma pack(push, 1)


typedef struct ErasureCodingMapHeader
{
    uint32_t identifier;       
    uint8_t  algorithm;        
    uint8_t  stripeGroupCount; 
    uint16_t compression;      
    uint64_t cmpLength;        
    uint64_t length;           
    uint64_t cmpCrc64;         
    uint64_t crc64;            
} ErasureCodingMapHeader;

typedef struct StripeGroupDescriptor
{
    uint8_t  groupType;       
    uint16_t K;               
    uint16_t M;               
    uint32_t shardSize;       
    uint32_t stripeCount;     
    uint16_t interleaveDepth; 
} StripeGroupDescriptor;

typedef struct StripeDataBlockEntry
{
    uint64_t offset;     
    uint32_t onDiskSize; 
    uint64_t shardCrc64; 
} StripeDataBlockEntry;

typedef struct StripeParityBlockEntry
{
    uint64_t offset; 
} StripeParityBlockEntry;

typedef struct AaruRecoveryFooter
{
    uint64_t     ecmbOffset;   
    uint64_t     ecmbLength;   
    uint64_t     headerCrc64;  
    AaruHeaderV2 backupHeader; 
    uint64_t     footerMagic;  
} AaruRecoveryFooter;
 
#pragma pack(pop)
 
#endif /* LIBAARUFORMAT_ERASURE_H */