68 lines
1.8 KiB
C++
68 lines
1.8 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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* filesystem.h
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* Filesystem.
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*/
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#ifndef FILESYSTEM_H
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#define FILESYSTEM_H
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class BlockGroup;
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class Device;
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class Inode;
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static const size_t INODE_HASH_LENGTH = 1 << 16;
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class Filesystem
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{
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public:
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Filesystem(Device* device, const char* mount_path);
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~Filesystem();
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public:
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Block* sb_block;
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struct ext_superblock* sb;
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Device* device;
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BlockGroup** block_groups;
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const char* mount_path;
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uint32_t block_size;
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uint32_t inode_size;
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uint32_t num_blocks;
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uint32_t num_groups;
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uint32_t num_inodes;
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Inode* mru_inode;
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Inode* lru_inode;
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Inode* dirty_inode;
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Inode* hash_inodes[INODE_HASH_LENGTH];
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time_t mtime_realtime;
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time_t mtime_monotonic;
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bool dirty;
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public:
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BlockGroup* GetBlockGroup(uint32_t group_id);
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Inode* GetInode(uint32_t inode_id);
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uint32_t AllocateBlock(BlockGroup* preferred = NULL);
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uint32_t AllocateInode(BlockGroup* preferred = NULL);
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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 BeginWrite();
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void FinishWrite();
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void Sync();
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};
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#endif
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