snapraid/cmdline/import.h

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2019-01-07 14:06:15 +01:00
/*
* Copyright (C) 2013 Andrea Mazzoleni
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __IMPORT_H
#define __IMPORT_H
#include "elem.h"
#include "state.h"
/****************************************************************************/
/* import */
/**
* Import block.
* Block used to import data external when recovering by hash.
*/
struct snapraid_import_block {
struct snapraid_import_file* file; /**< Back pointer to the file owning this block. */
unsigned size; /**< Size of the block. */
data_off_t offset; /**< Position of the block in the file. */
unsigned char hash[HASH_MAX]; /**< Hash of the block. */
unsigned char prevhash[HASH_MAX]; /**< Previous hash of the block. Valid only if we are in rehash state. */
/* nodes for data structures */
tommy_hashdyn_node nodeset;
tommy_hashdyn_node prevnodeset;
};
/**
* Import file.
* File used to import data external when recovering by hash.
*/
struct snapraid_import_file {
data_off_t size; /**< Size of the file. */
struct snapraid_import_block* blockimp; /**< All the blocks of the file. */
block_off_t blockmax; /**< Number of blocks. */
char* path; /**< Full path of the file. */
/* nodes for data structures */
tommy_node nodelist;
};
/**
* Deallocate an import file.
*/
void import_file_free(struct snapraid_import_file* file);
/**
* Fetch a block from the specified hash.
* Return ==0 if the block is found, and copied into buffer.
*/
int state_import_fetch(struct snapraid_state* state, int prevhash, struct snapraid_block* missing_block, unsigned char* buffer);
/**
* Import files from the specified directory.
*/
void state_import(struct snapraid_state* state, const char* dir);
#endif