89 lines
2.6 KiB
C++
89 lines
2.6 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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* inode.h
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* Filesystem inode.
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*/
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#ifndef INODE_H
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#define INODE_H
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class Block;
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class Filesystem;
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class Inode
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{
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public:
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Inode(Filesystem* filesystem, uint32_t inode_id);
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~Inode();
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public:
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Inode* prev_inode;
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Inode* next_inode;
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Inode* prev_hashed;
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Inode* next_hashed;
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Inode* prev_dirty;
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Inode* next_dirty;
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Block* data_block;
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struct ext_inode* data;
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Filesystem* filesystem;
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size_t reference_count;
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size_t remote_reference_count;
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uint32_t inode_id;
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bool dirty;
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public:
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uint32_t Mode();
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uint32_t UserId();
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uint32_t GroupId();
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uint64_t Size();
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void SetMode(uint32_t mode);
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void SetUserId(uint32_t user);
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void SetGroupId(uint32_t group);
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void SetSize(uint64_t new_size);
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void Truncate(uint64_t new_size);
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bool FreeIndirect(uint64_t from, uint64_t offset, uint32_t block_id,
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int indirection, uint64_t entry_span);
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Block* GetBlock(uint64_t offset);
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Block* GetBlockFromTable(Block* table, uint32_t index);
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Inode* Open(const char* elem, int flags, mode_t mode);
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bool Link(const char* elem, Inode* dest, bool directories);
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bool Symlink(const char* elem, const char* dest);
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bool Unlink(const char* elem, bool directories, bool force=false);
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Inode* UnlinkKeep(const char* elem, bool directories, bool force=false);
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ssize_t ReadAt(uint8_t* buffer, size_t count, off_t offset);
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ssize_t WriteAt(const uint8_t* buffer, size_t count, off_t offset);
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bool UnembedInInode();
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bool Rename(Inode* olddir, const char* oldname, const char* newname);
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Inode* CreateDirectory(const char* path, mode_t mode);
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bool RemoveDirectory(const char* path);
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bool IsEmptyDirectory();
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void Refer();
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void Unref();
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void RemoteRefer();
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void RemoteUnref();
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void Sync();
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void BeginWrite();
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void FinishWrite();
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void Modified();
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void Use();
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void Unlink();
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void Prelink();
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void Delete();
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};
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#endif
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