1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
#pragma once
#include "DiskDevice.h"
#include "InodeIdentifier.h"
#include "InodeMetadata.h"
#include "Limits.h"
#include "UnixTypes.h"
#include <AK/ByteBuffer.h>
#include <AK/HashMap.h>
#include <AK/OwnPtr.h>
#include <AK/Retainable.h>
#include <AK/RetainPtr.h>
#include <AK/String.h>
#include <functional>
static const dword mepoch = 476763780;
class FileSystem : public Retainable<FileSystem> {
public:
virtual ~FileSystem();
dword id() const { return m_id; }
static FileSystem* fromID(dword);
virtual bool initialize() = 0;
virtual const char* className() const = 0;
virtual InodeIdentifier rootInode() const = 0;
virtual bool writeInode(InodeIdentifier, const ByteBuffer&) = 0;
virtual InodeMetadata inodeMetadata(InodeIdentifier) const = 0;
virtual Unix::ssize_t readInodeBytes(InodeIdentifier, Unix::off_t offset, Unix::size_t count, byte* buffer) const = 0;
struct DirectoryEntry {
String name;
InodeIdentifier inode;
byte fileType { 0 };
};
virtual bool enumerateDirectoryInode(InodeIdentifier, std::function<bool(const DirectoryEntry&)>) const = 0;
virtual bool setModificationTime(InodeIdentifier, dword timestamp) = 0;
virtual InodeIdentifier createInode(InodeIdentifier parentInode, const String& name, Unix::mode_t, unsigned size) = 0;
virtual InodeIdentifier makeDirectory(InodeIdentifier parentInode, const String& name, Unix::mode_t) = 0;
InodeIdentifier childOfDirectoryInodeWithName(InodeIdentifier, const String& name) const;
ByteBuffer readEntireInode(InodeIdentifier) const;
protected:
FileSystem();
private:
dword m_id { 0 };
};
inline FileSystem* InodeIdentifier::fileSystem()
{
return FileSystem::fromID(m_fileSystemID);
}
inline const FileSystem* InodeIdentifier::fileSystem() const
{
return FileSystem::fromID(m_fileSystemID);
}
inline InodeMetadata InodeIdentifier::metadata() const
{
if (!isValid())
return InodeMetadata();
return fileSystem()->inodeMetadata(*this);
}
inline bool InodeIdentifier::isRootInode() const
{
return (*this) == fileSystem()->rootInode();
}
namespace AK {
template<>
struct Traits<InodeIdentifier> {
// FIXME: This is a shitty hash.
static unsigned hash(const InodeIdentifier& inode) { return Traits<unsigned>::hash(inode.fileSystemID()) + Traits<unsigned>::hash(inode.index()); }
static void dump(const InodeIdentifier& inode) { printf("%02u:%08u", inode.fileSystemID(), inode.index()); }
};
}
|
