75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
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/*
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* Copyright (C) 2013 Andrea Mazzoleni
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __IMPORT_H
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#define __IMPORT_H
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#include "elem.h"
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#include "state.h"
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/****************************************************************************/
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/* import */
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/**
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* Import block.
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* Block used to import data external when recovering by hash.
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*/
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struct snapraid_import_block {
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struct snapraid_import_file* file; /**< Back pointer to the file owning this block. */
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unsigned size; /**< Size of the block. */
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data_off_t offset; /**< Position of the block in the file. */
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unsigned char hash[HASH_MAX]; /**< Hash of the block. */
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unsigned char prevhash[HASH_MAX]; /**< Previous hash of the block. Valid only if we are in rehash state. */
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/* nodes for data structures */
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tommy_hashdyn_node nodeset;
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tommy_hashdyn_node prevnodeset;
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};
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/**
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* Import file.
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* File used to import data external when recovering by hash.
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*/
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struct snapraid_import_file {
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data_off_t size; /**< Size of the file. */
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struct snapraid_import_block* blockimp; /**< All the blocks of the file. */
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block_off_t blockmax; /**< Number of blocks. */
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char* path; /**< Full path of the file. */
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/* nodes for data structures */
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tommy_node nodelist;
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};
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/**
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* Deallocate an import file.
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*/
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void import_file_free(struct snapraid_import_file* file);
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/**
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* Fetch a block from the specified hash.
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* Return ==0 if the block is found, and copied into buffer.
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*/
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int state_import_fetch(struct snapraid_state* state, int prevhash, struct snapraid_block* missing_block, unsigned char* buffer);
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/**
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* Import files from the specified directory.
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*/
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void state_import(struct snapraid_state* state, const char* dir);
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#endif
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