69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
/*
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* Copyright (c) 2013, 2014, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* blockgroup.h
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* Filesystem block group.
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*/
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#ifndef BLOCKGROUP_H
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#define BLOCKGROUP_H
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class Block;
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class Filesystem;
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class BlockGroup
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{
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public:
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BlockGroup(Filesystem* filesystem, uint32_t group_id);
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~BlockGroup();
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public:
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Block* data_block;
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struct ext_blockgrpdesc* data;
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Filesystem* filesystem;
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Block* block_bitmap_chunk;
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Block* inode_bitmap_chunk;
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size_t reference_count;
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uint32_t group_id;
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uint32_t block_alloc_chunk;
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uint32_t inode_alloc_chunk;
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uint32_t block_bitmap_chunk_i;
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uint32_t inode_bitmap_chunk_i;
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uint32_t first_block_id;
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uint32_t first_inode_id;
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uint32_t num_blocks;
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uint32_t num_inodes;
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uint32_t num_block_bitmap_chunks;
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uint32_t num_inode_bitmap_chunks;
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bool dirty;
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public:
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uint32_t AllocateBlock();
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uint32_t AllocateInode();
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void FreeBlock(uint32_t block_id);
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void FreeInode(uint32_t inode_id);
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void Refer();
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void Unref();
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void Sync();
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void BeginWrite();
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void FinishWrite();
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void Use();
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void Unlink();
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void Prelink();
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};
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#endif
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