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
87
88
89
90
91
92
93
94
95
96
|
#pragma once
#include <Kernel/Devices/DiskDevice.h>
#include "InodeIdentifier.h"
#include "InodeMetadata.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/AKString.h>
#include <AK/Function.h>
#include <AK/kstdio.h>
#include <Kernel/Lock.h>
#include <AK/WeakPtr.h>
#include <Kernel/KResult.h>
static const dword mepoch = 476763780;
class Inode;
class FileDescriptor;
class LocalSocket;
class VMObject;
class FS : public Retainable<FS> {
friend class Inode;
public:
virtual ~FS();
unsigned fsid() const { return m_fsid; }
static FS* from_fsid(dword);
static void sync();
virtual bool initialize() = 0;
virtual const char* class_name() const = 0;
virtual InodeIdentifier root_inode() const = 0;
bool is_readonly() const { return m_readonly; }
virtual unsigned total_block_count() const { return 0; }
virtual unsigned free_block_count() const { return 0; }
virtual unsigned total_inode_count() const { return 0; }
virtual unsigned free_inode_count() const { return 0; }
struct DirectoryEntry {
DirectoryEntry(const char* name, InodeIdentifier, byte file_type);
DirectoryEntry(const char* name, int name_length, InodeIdentifier, byte file_type);
char name[256];
int name_length { 0 };
InodeIdentifier inode;
byte file_type { 0 };
};
virtual RetainPtr<Inode> create_inode(InodeIdentifier parentInode, const String& name, mode_t, off_t size, dev_t, int& error) = 0;
virtual RetainPtr<Inode> create_directory(InodeIdentifier parentInode, const String& name, mode_t, int& error) = 0;
virtual RetainPtr<Inode> get_inode(InodeIdentifier) const = 0;
virtual void flush_writes() { }
protected:
FS();
mutable Lock m_lock { "FS" };
private:
unsigned m_fsid { 0 };
bool m_readonly { false };
};
inline FS* InodeIdentifier::fs()
{
return FS::from_fsid(m_fsid);
}
inline const FS* InodeIdentifier::fs() const
{
return FS::from_fsid(m_fsid);
}
inline bool InodeIdentifier::is_root_inode() const
{
return (*this) == fs()->root_inode();
}
namespace AK {
template<>
struct Traits<InodeIdentifier> {
static unsigned hash(const InodeIdentifier& inode) { return pair_int_hash(inode.fsid(), inode.index()); }
static void dump(const InodeIdentifier& inode) { kprintf("%02u:%08u", inode.fsid(), inode.index()); }
};
}
|
