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