mirror of
https://github.com/RGBCube/serenity
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87 lines
2.5 KiB
C++
87 lines
2.5 KiB
C++
#pragma once
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#include "DiskDevice.h"
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#include "InodeIdentifier.h"
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#include "InodeMetadata.h"
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#include "Limits.h"
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#include "UnixTypes.h"
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#include <AK/ByteBuffer.h>
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#include <AK/HashMap.h>
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#include <AK/OwnPtr.h>
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#include <AK/Retainable.h>
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#include <AK/RetainPtr.h>
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#include <AK/String.h>
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#include <AK/Function.h>
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#include <AK/kstdio.h>
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static const dword mepoch = 476763780;
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class FileSystem : public Retainable<FileSystem> {
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public:
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virtual ~FileSystem();
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dword id() const { return m_id; }
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static FileSystem* fromID(dword);
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virtual bool initialize() = 0;
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virtual const char* className() const = 0;
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virtual InodeIdentifier rootInode() const = 0;
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virtual bool writeInode(InodeIdentifier, const ByteBuffer&) = 0;
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virtual InodeMetadata inodeMetadata(InodeIdentifier) const = 0;
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virtual Unix::ssize_t readInodeBytes(InodeIdentifier, Unix::off_t offset, Unix::size_t count, byte* buffer) const = 0;
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struct DirectoryEntry {
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String name;
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InodeIdentifier inode;
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byte fileType { 0 };
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};
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virtual bool enumerateDirectoryInode(InodeIdentifier, Function<bool(const DirectoryEntry&)>) const = 0;
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virtual bool setModificationTime(InodeIdentifier, dword timestamp) = 0;
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virtual InodeIdentifier createInode(InodeIdentifier parentInode, const String& name, Unix::mode_t, unsigned size) = 0;
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virtual InodeIdentifier makeDirectory(InodeIdentifier parentInode, const String& name, Unix::mode_t) = 0;
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InodeIdentifier childOfDirectoryInodeWithName(InodeIdentifier, const String& name) const;
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ByteBuffer readEntireInode(InodeIdentifier) const;
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protected:
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FileSystem();
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private:
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dword m_id { 0 };
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};
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inline FileSystem* InodeIdentifier::fileSystem()
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{
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return FileSystem::fromID(m_fileSystemID);
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}
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inline const FileSystem* InodeIdentifier::fileSystem() const
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{
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return FileSystem::fromID(m_fileSystemID);
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}
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inline InodeMetadata InodeIdentifier::metadata() const
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{
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if (!isValid())
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return InodeMetadata();
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return fileSystem()->inodeMetadata(*this);
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}
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inline bool InodeIdentifier::isRootInode() const
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{
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return (*this) == fileSystem()->rootInode();
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}
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namespace AK {
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template<>
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struct Traits<InodeIdentifier> {
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// FIXME: This is a shitty hash.
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static unsigned hash(const InodeIdentifier& inode) { return Traits<unsigned>::hash(inode.fileSystemID()) + Traits<unsigned>::hash(inode.index()); }
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static void dump(const InodeIdentifier& inode) { kprintf("%02u:%08u", inode.fileSystemID(), inode.index()); }
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};
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}
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