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sortix--sortix/ext/blockgroup.h

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/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013, 2014, 2015.
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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/>.
blockgroup.h
Filesystem block group.
*******************************************************************************/
#ifndef BLOCKGROUP_H
#define BLOCKGROUP_H
class Block;
class Filesystem;
class BlockGroup
{
public:
BlockGroup(Filesystem* filesystem, uint32_t group_id);
~BlockGroup();
public:
Block* data_block;
struct ext_blockgrpdesc* data;
Filesystem* filesystem;
Block* block_bitmap_chunk;
Block* inode_bitmap_chunk;
size_t reference_count;
uint32_t group_id;
uint32_t block_alloc_chunk;
uint32_t inode_alloc_chunk;
uint32_t block_bitmap_chunk_i;
uint32_t inode_bitmap_chunk_i;
uint32_t first_block_id;
uint32_t first_inode_id;
uint32_t num_blocks;
uint32_t num_inodes;
uint32_t num_block_bitmap_chunks;
uint32_t num_inode_bitmap_chunks;
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bool dirty;
public:
uint32_t AllocateBlock();
uint32_t AllocateInode();
void FreeBlock(uint32_t block_id);
void FreeInode(uint32_t inode_id);
void Refer();
void Unref();
void Sync();
void BeginWrite();
void FinishWrite();
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void Use();
void Unlink();
void Prelink();
};
#endif