LinnGroup.h

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/*
 * Copyright (C) 2009 Niek Linnenbank
 *
 * 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 __FILESYSTEM_LINN_GROUP_H
#define __FILESYSTEM_LINN_GROUP_H
 
#include <Types.h>
#include "LinnSuperBlock.h"
 
#define LINN_GROUP_BLOCK_BITMAP 0
 
#define LINN_GROUP_INODE_BITMAP 1
 
#define LINN_GROUP_INODE_TABLE  2
 
#define LINN_GROUP_COUNT(sb) \
    ((sb)->blocksCount / (sb)->blocksPerGroup ? \
     (sb)->blocksCount / (sb)->blocksPerGroup : 1)
 
#define LINN_GROUP_NUM_BLOCKMAP(sb) \
    ((sb)->blocksPerGroup / LINN_SUPER_NUM_PTRS(sb) ? \
     (sb)->blocksPerGroup / LINN_SUPER_NUM_PTRS(sb) : 1)
 
#define LINN_GROUP_NUM_INODEMAP(sb) \
    ((sb)->inodesPerGroup / LINN_SUPER_NUM_PTRS(sb) ? \
     (sb)->inodesPerGroup / LINN_SUPER_NUM_PTRS(sb) : 1)
 
#define LINN_GROUP_NUM_INODETAB(sb) \
    ((sb)->inodesPerGroup / ((sb)->blockSize / sizeof(LinnInode)) ? \
     (sb)->inodesPerGroup / ((sb)->blockSize / sizeof(LinnInode)) : 1)
 
#define LINN_GROUP_PER_BLOCK(sb) \
    ((sb)->blockSize / sizeof(LinnGroup))
 
#define LINN_GROUP_BLOCKS(sb) \
    (LINN_GROUP_COUNT(sb) / LINN_GROUP_PER_BLOCK(sb) ? \
     LINN_GROUP_COUNT(sb) / LINN_GROUP_PER_BLOCK(sb) : 1)
 
typedef struct LinnGroup
{
    le32 freeBlocksCount;
 
    le32 freeInodesCount;
 
    le32 blockMap;
 
    le32 inodeMap;
 
    le32 inodeTable;
}
LinnGroup;
 
#endif /* __FILESYSTEM_LINN_GROUP_H */