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0.4.16-dev-981-g80eb313
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Examples
ext.h
Go to the documentation of this file.
1
/*
2
* FreeLoader
3
* Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com>
4
* Copyright (C) 2024-2025 Daniel Victor <ilauncherdeveloper@gmail.com>
5
*
6
* This program is free software; you can redistribute it and/or modify
7
* it under the terms of the GNU General Public License as published by
8
* the Free Software Foundation; either version 2 of the License, or
9
* (at your option) any later version.
10
*
11
* This program is distributed in the hope that it will be useful,
12
* but WITHOUT ANY WARRANTY; without even the implied warranty of
13
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14
* GNU General Public License for more details.
15
*
16
* You should have received a copy of the GNU General Public License along
17
* with this program; if not, write to the Free Software Foundation, Inc.,
18
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19
*/
20
21
#pragma once
22
23
/*
24
* grub/fs/ext2.c
25
*
26
* GRUB -- GRand Unified Bootloader
27
* Copyright (C) 2003,2004,2005,2007 Free Software Foundation, Inc.
28
*
29
* This program is free software; you can redistribute it and/or modify
30
* it under the terms of the GNU General Public License as published by
31
* the Free Software Foundation; either version 2 of the License, or
32
* (at your option) any later version.
33
*
34
* This program is distributed in the hope that it will be useful,
35
* but WITHOUT ANY WARRANTY; without even the implied warranty of
36
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
37
* GNU General Public License for more details.
38
*
39
* You should have received a copy of the GNU General Public License
40
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
41
*/
42
43
#include <pshpack1.h>
44
45
#define EXT_SUPERBLOCK_MAGIC 0xEF53
46
#define EXT_DYNAMIC_REVISION 1
47
#define EXT_DEFAULT_INODE_SIZE 128
48
#define EXT_DEFAULT_GROUP_DESC_SIZE 32
49
50
#define EXT_DIR_ENTRY_MAX_NAME_LENGTH 255
51
52
typedef
struct
_ExtSuperBlock
53
{
54
/* SuperBlock Information Ext2 */
55
ULONG
InodesCount
;
56
ULONG
BlocksCountLo
;
57
ULONG
RBlocksCountLo
;
58
ULONG
FreeBlocksCountLo
;
59
ULONG
FreeInodesCount
;
60
ULONG
FirstDataBlock
;
61
ULONG
LogBlockSize
;
62
LONG
LogFragSize
;
63
ULONG
BlocksPerGroup
;
64
ULONG
FragsPerGroup
;
65
ULONG
InodesPerGroup
;
66
ULONG
MTime
;
67
ULONG
WTime
;
68
USHORT
MntCount
;
69
USHORT
MaxMntCount
;
70
USHORT
Magic
;
71
USHORT
State
;
72
USHORT
Errors
;
73
USHORT
MinorRevisionLevel
;
74
ULONG
LastCheck
;
75
ULONG
CheckInterval
;
76
ULONG
CreatorOS
;
77
ULONG
RevisionLevel
;
78
USHORT
DefResUID
;
79
USHORT
DefResGID
;
80
81
/* SuperBlock Information Ext3 */
82
ULONG
FirstInode
;
83
USHORT
InodeSize
;
84
USHORT
BlockGroupNr
;
85
ULONG
FeatureCompat
;
86
ULONG
FeatureIncompat
;
87
ULONG
FeatureROCompat
;
88
UCHAR
UUID
[16];
89
CHAR
VolumeName
[16];
90
CHAR
LastMounted
[64];
91
ULONG
AlgorithmUsageBitmap
;
92
UCHAR
PreallocBlocks
;
93
UCHAR
PreallocDirBlocks
;
94
USHORT
ReservedGdtBlocks
;
95
UCHAR
JournalUUID
[16];
96
ULONG
JournalInum
;
97
ULONG
JournalDev
;
98
ULONG
LastOrphan
;
99
ULONG
HashSeed
[4];
100
UCHAR
DefHashVersion
;
101
UCHAR
JournalBackupType
;
102
USHORT
GroupDescSize
;
103
UCHAR
Reserved
[768];
104
}
EXT_SUPER_BLOCK
, *
PEXT_SUPER_BLOCK
;
105
106
typedef
struct
_ExtGroupDescriptor
107
{
108
ULONG
BlockBitmap
;
109
ULONG
InodeBitmap
;
110
ULONG
InodeTable
;
111
USHORT
FreeBlocksCount
;
112
USHORT
FreeInodesCount
;
113
USHORT
UsedDirsCount
;
114
}
EXT_GROUP_DESC
, *
PEXT_GROUP_DESC
;
115
116
typedef
struct
_Ext4ExtentHeader
117
{
118
USHORT
Magic
;
119
USHORT
Entries
;
120
USHORT
Max
;
121
USHORT
Depth
;
122
ULONG
Generation
;
123
}
EXT4_EXTENT_HEADER
, *
PEXT4_EXTENT_HEADER
;
124
125
typedef
struct
_Ext4ExtentIdx
126
{
127
ULONG
Block
;
128
ULONG
Leaf
;
129
USHORT
LeafHigh
;
130
USHORT
Unused
;
131
}
EXT4_EXTENT_IDX
, *
PEXT4_EXTENT_IDX
;
132
133
typedef
struct
_Ext4Extent
134
{
135
ULONG
Block
;
136
USHORT
Length
;
137
USHORT
StartHigh
;
138
ULONG
Start
;
139
}
EXT4_EXTENT
, *
PEXT4_EXTENT
;
140
141
typedef
struct
_ExtInode
142
{
143
USHORT
Mode
;
144
USHORT
UID
;
145
ULONG
Size
;
146
ULONG
Atime
;
147
ULONG
Ctime
;
148
ULONG
Mtime
;
149
ULONG
Dtime
;
150
USHORT
GID
;
151
USHORT
LinksCount
;
152
ULONG
BlocksCount
;
153
ULONG
Flags
;
154
ULONG
OSD1
;
155
union
156
{
157
CHAR
SymLink
[60];
158
struct
159
{
160
ULONG
DirectBlocks
[12];
161
ULONG
IndirectBlock
;
162
ULONG
DoubleIndirectBlock
;
163
ULONG
TripleIndirectBlock
;
164
}
Blocks
;
165
EXT4_EXTENT_HEADER
ExtentHeader
;
166
};
167
ULONG
Generation
;
168
ULONG
FileACL
;
169
ULONG
DirACL
;
170
ULONG
FragAddress
;
171
ULONG
OSD2
[3];
172
}
EXT_INODE
, *
PEXT_INODE
;
173
174
typedef
struct
_ExtDirEntry
175
{
176
ULONG
Inode
;
177
USHORT
EntryLen
;
178
UCHAR
NameLen
;
179
UCHAR
FileType
;
180
CHAR
Name
[
EXT_DIR_ENTRY_MAX_NAME_LENGTH
];
181
}
EXT_DIR_ENTRY
, *
PEXT_DIR_ENTRY
;
182
183
#include <poppack.h>
184
185
/* Special inode numbers. */
186
#define EXT_ROOT_INODE 2
187
188
/* The revision level. */
189
#define EXT_REVISION(sb) (sb->RevisionLevel)
190
191
/* The inode size. */
192
#define EXT_INODE_SIZE(sb) \
193
(EXT_REVISION(sb) < EXT_DYNAMIC_REVISION ? EXT_DEFAULT_INODE_SIZE : sb->InodeSize)
194
195
/* The group descriptor size. */
196
#define EXT_GROUP_DESC_SIZE(sb) \
197
((EXT_REVISION(sb) >= EXT_DYNAMIC_REVISION && sb->GroupDescSize) ? sb->GroupDescSize : EXT_DEFAULT_GROUP_DESC_SIZE)
198
199
/* The inode extents flag. */
200
#define EXT4_INODE_FLAG_EXTENTS 0x80000
201
202
/* The extent header magic value. */
203
#define EXT4_EXTENT_HEADER_MAGIC 0xF30A
204
205
/* The maximum extent level. */
206
#define EXT4_EXTENT_MAX_LEVEL 5
207
208
/* The maximum extent length used to check for sparse extents. */
209
#define EXT4_EXTENT_MAX_LENGTH 32768
210
211
// EXT_INODE::mode values
212
#define EXT_S_IRWXO 0x0007
// Other mask
213
#define EXT_S_IXOTH 0x0001
// ---------x execute
214
#define EXT_S_IWOTH 0x0002
// --------w- write
215
#define EXT_S_IROTH 0x0004
// -------r-- read
216
217
#define EXT_S_IRWXG 0x0038
// Group mask
218
#define EXT_S_IXGRP 0x0008
// ------x--- execute
219
#define EXT_S_IWGRP 0x0010
// -----w---- write
220
#define EXT_S_IRGRP 0x0020
// ----r----- read
221
222
#define EXT_S_IRWXU 0x01C0
// User mask
223
#define EXT_S_IXUSR 0x0040
// ---x------ execute
224
#define EXT_S_IWUSR 0x0080
// --w------- write
225
#define EXT_S_IRUSR 0x0100
// -r-------- read
226
227
#define EXT_S_ISVTX 0x0200
// Sticky bit
228
#define EXT_S_ISGID 0x0400
// SGID
229
#define EXT_S_ISUID 0x0800
// SUID
230
231
#define EXT_S_IFMT 0xF000
// Format mask
232
#define EXT_S_IFIFO 0x1000
// FIFO buffer
233
#define EXT_S_IFCHR 0x2000
// Character device
234
#define EXT_S_IFDIR 0x4000
// Directory
235
#define EXT_S_IFBLK 0x6000
// Block device
236
#define EXT_S_IFREG 0x8000
// Regular file
237
#define EXT_S_IFLNK 0xA000
// Symbolic link
238
#define EXT_S_IFSOCK 0xC000
// Socket
239
240
#define FAST_SYMLINK_MAX_NAME_SIZE 60
241
242
typedef
struct
_EXT_VOLUME_INFO
*
PEXT_VOLUME_INFO
;
243
244
typedef
struct
_EXT_FILE_INFO
245
{
246
ULONGLONG
FileSize
;
// File size
247
ULONGLONG
FilePointer
;
// File pointer
248
PULONG
FileBlockList
;
// File block list
249
EXT_INODE
Inode
;
// File's inode
250
PEXT_VOLUME_INFO
Volume
;
251
}
EXT_FILE_INFO
, *
PEXT_FILE_INFO
;
252
253
const
DEVVTBL
*
ExtMount
(
ULONG
DeviceId);
EXT4_EXTENT
struct _Ext4Extent EXT4_EXTENT
PEXT4_EXTENT
struct _Ext4Extent * PEXT4_EXTENT
EXT_GROUP_DESC
struct _ExtGroupDescriptor EXT_GROUP_DESC
EXT_INODE
struct _ExtInode EXT_INODE
PEXT_VOLUME_INFO
struct _EXT_VOLUME_INFO * PEXT_VOLUME_INFO
Definition:
ext.h:242
EXT_DIR_ENTRY
struct _ExtDirEntry EXT_DIR_ENTRY
EXT_FILE_INFO
struct _EXT_FILE_INFO EXT_FILE_INFO
PEXT_FILE_INFO
struct _EXT_FILE_INFO * PEXT_FILE_INFO
PEXT_SUPER_BLOCK
struct _ExtSuperBlock * PEXT_SUPER_BLOCK
EXT4_EXTENT_IDX
struct _Ext4ExtentIdx EXT4_EXTENT_IDX
EXT4_EXTENT_HEADER
struct _Ext4ExtentHeader EXT4_EXTENT_HEADER
PEXT_DIR_ENTRY
struct _ExtDirEntry * PEXT_DIR_ENTRY
PEXT_INODE
struct _ExtInode * PEXT_INODE
ExtMount
const DEVVTBL * ExtMount(ULONG DeviceId)
Definition:
ext.c:1380
PEXT4_EXTENT_HEADER
struct _Ext4ExtentHeader * PEXT4_EXTENT_HEADER
EXT_DIR_ENTRY_MAX_NAME_LENGTH
#define EXT_DIR_ENTRY_MAX_NAME_LENGTH
Definition:
ext.h:50
PEXT4_EXTENT_IDX
struct _Ext4ExtentIdx * PEXT4_EXTENT_IDX
EXT_SUPER_BLOCK
struct _ExtSuperBlock EXT_SUPER_BLOCK
PEXT_GROUP_DESC
struct _ExtGroupDescriptor * PEXT_GROUP_DESC
GUID
Definition:
shobjidl.idl:2989
LONG
long LONG
Definition:
pedump.c:60
USHORT
unsigned short USHORT
Definition:
pedump.c:61
_EXT_FILE_INFO
Definition:
ext.h:245
_EXT_FILE_INFO::Inode
EXT_INODE Inode
Definition:
ext.h:249
_EXT_FILE_INFO::Volume
PEXT_VOLUME_INFO Volume
Definition:
ext.h:250
_EXT_FILE_INFO::FileBlockList
PULONG FileBlockList
Definition:
ext.h:248
_EXT_FILE_INFO::FilePointer
ULONGLONG FilePointer
Definition:
ext.h:247
_EXT_FILE_INFO::FileSize
ULONGLONG FileSize
Definition:
ext.h:246
_EXT_VOLUME_INFO
Definition:
ext.c:49
_Ext4ExtentHeader
Definition:
ext.h:117
_Ext4ExtentHeader::Generation
ULONG Generation
Definition:
ext.h:122
_Ext4ExtentHeader::Magic
USHORT Magic
Definition:
ext.h:118
_Ext4ExtentHeader::Max
USHORT Max
Definition:
ext.h:120
_Ext4ExtentHeader::Depth
USHORT Depth
Definition:
ext.h:121
_Ext4ExtentHeader::Entries
USHORT Entries
Definition:
ext.h:119
_Ext4ExtentIdx
Definition:
ext.h:126
_Ext4ExtentIdx::Leaf
ULONG Leaf
Definition:
ext.h:128
_Ext4ExtentIdx::Unused
USHORT Unused
Definition:
ext.h:130
_Ext4ExtentIdx::Block
ULONG Block
Definition:
ext.h:127
_Ext4ExtentIdx::LeafHigh
USHORT LeafHigh
Definition:
ext.h:129
_Ext4Extent
Definition:
ext.h:134
_Ext4Extent::Block
ULONG Block
Definition:
ext.h:135
_Ext4Extent::StartHigh
USHORT StartHigh
Definition:
ext.h:137
_Ext4Extent::Length
USHORT Length
Definition:
ext.h:136
_Ext4Extent::Start
ULONG Start
Definition:
ext.h:138
_ExtDirEntry
Definition:
ext.h:175
_ExtDirEntry::EntryLen
USHORT EntryLen
Definition:
ext.h:177
_ExtDirEntry::Inode
ULONG Inode
Definition:
ext.h:176
_ExtDirEntry::FileType
UCHAR FileType
Definition:
ext.h:179
_ExtDirEntry::Name
CHAR Name[EXT_DIR_ENTRY_MAX_NAME_LENGTH]
Definition:
ext.h:180
_ExtDirEntry::NameLen
UCHAR NameLen
Definition:
ext.h:178
_ExtGroupDescriptor
Definition:
ext.h:107
_ExtGroupDescriptor::FreeBlocksCount
USHORT FreeBlocksCount
Definition:
ext.h:111
_ExtGroupDescriptor::InodeBitmap
ULONG InodeBitmap
Definition:
ext.h:109
_ExtGroupDescriptor::InodeTable
ULONG InodeTable
Definition:
ext.h:110
_ExtGroupDescriptor::BlockBitmap
ULONG BlockBitmap
Definition:
ext.h:108
_ExtGroupDescriptor::FreeInodesCount
USHORT FreeInodesCount
Definition:
ext.h:112
_ExtGroupDescriptor::UsedDirsCount
USHORT UsedDirsCount
Definition:
ext.h:113
_ExtInode
Definition:
ext.h:142
_ExtInode::Dtime
ULONG Dtime
Definition:
ext.h:149
_ExtInode::DirACL
ULONG DirACL
Definition:
ext.h:169
_ExtInode::LinksCount
USHORT LinksCount
Definition:
ext.h:151
_ExtInode::IndirectBlock
ULONG IndirectBlock
Definition:
ext.h:161
_ExtInode::ExtentHeader
EXT4_EXTENT_HEADER ExtentHeader
Definition:
ext.h:165
_ExtInode::SymLink
CHAR SymLink[60]
Definition:
ext.h:157
_ExtInode::FragAddress
ULONG FragAddress
Definition:
ext.h:170
_ExtInode::Flags
ULONG Flags
Definition:
ext.h:153
_ExtInode::TripleIndirectBlock
ULONG TripleIndirectBlock
Definition:
ext.h:163
_ExtInode::GID
USHORT GID
Definition:
ext.h:150
_ExtInode::Generation
ULONG Generation
Definition:
ext.h:167
_ExtInode::Ctime
ULONG Ctime
Definition:
ext.h:147
_ExtInode::Mode
USHORT Mode
Definition:
ext.h:143
_ExtInode::UID
USHORT UID
Definition:
ext.h:144
_ExtInode::OSD1
ULONG OSD1
Definition:
ext.h:154
_ExtInode::FileACL
ULONG FileACL
Definition:
ext.h:168
_ExtInode::Size
ULONG Size
Definition:
ext.h:145
_ExtInode::DirectBlocks
ULONG DirectBlocks[12]
Definition:
ext.h:160
_ExtInode::Blocks
struct _ExtInode::@188::@190 Blocks
_ExtInode::Mtime
ULONG Mtime
Definition:
ext.h:148
_ExtInode::OSD2
ULONG OSD2[3]
Definition:
ext.h:171
_ExtInode::BlocksCount
ULONG BlocksCount
Definition:
ext.h:152
_ExtInode::Atime
ULONG Atime
Definition:
ext.h:146
_ExtInode::DoubleIndirectBlock
ULONG DoubleIndirectBlock
Definition:
ext.h:162
_ExtSuperBlock
Definition:
ext.h:53
_ExtSuperBlock::GroupDescSize
USHORT GroupDescSize
Definition:
ext.h:102
_ExtSuperBlock::FreeInodesCount
ULONG FreeInodesCount
Definition:
ext.h:59
_ExtSuperBlock::PreallocDirBlocks
UCHAR PreallocDirBlocks
Definition:
ext.h:93
_ExtSuperBlock::FeatureCompat
ULONG FeatureCompat
Definition:
ext.h:85
_ExtSuperBlock::HashSeed
ULONG HashSeed[4]
Definition:
ext.h:99
_ExtSuperBlock::FeatureIncompat
ULONG FeatureIncompat
Definition:
ext.h:86
_ExtSuperBlock::DefHashVersion
UCHAR DefHashVersion
Definition:
ext.h:100
_ExtSuperBlock::InodesCount
ULONG InodesCount
Definition:
ext.h:55
_ExtSuperBlock::JournalBackupType
UCHAR JournalBackupType
Definition:
ext.h:101
_ExtSuperBlock::BlocksCountLo
ULONG BlocksCountLo
Definition:
ext.h:56
_ExtSuperBlock::MaxMntCount
USHORT MaxMntCount
Definition:
ext.h:69
_ExtSuperBlock::DefResUID
USHORT DefResUID
Definition:
ext.h:78
_ExtSuperBlock::InodesPerGroup
ULONG InodesPerGroup
Definition:
ext.h:65
_ExtSuperBlock::MTime
ULONG MTime
Definition:
ext.h:66
_ExtSuperBlock::CreatorOS
ULONG CreatorOS
Definition:
ext.h:76
_ExtSuperBlock::Magic
USHORT Magic
Definition:
ext.h:70
_ExtSuperBlock::LogBlockSize
ULONG LogBlockSize
Definition:
ext.h:61
_ExtSuperBlock::LastCheck
ULONG LastCheck
Definition:
ext.h:74
_ExtSuperBlock::RevisionLevel
ULONG RevisionLevel
Definition:
ext.h:77
_ExtSuperBlock::BlockGroupNr
USHORT BlockGroupNr
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ext.h:84
_ExtSuperBlock::CheckInterval
ULONG CheckInterval
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ext.h:75
_ExtSuperBlock::AlgorithmUsageBitmap
ULONG AlgorithmUsageBitmap
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ext.h:91
_ExtSuperBlock::LogFragSize
LONG LogFragSize
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ext.h:62
_ExtSuperBlock::FragsPerGroup
ULONG FragsPerGroup
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ext.h:64
_ExtSuperBlock::DefResGID
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_ExtSuperBlock::VolumeName
CHAR VolumeName[16]
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ext.h:89
_ExtSuperBlock::BlocksPerGroup
ULONG BlocksPerGroup
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ext.h:63
_ExtSuperBlock::FirstInode
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ext.h:82
_ExtSuperBlock::WTime
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ext.h:67
_ExtSuperBlock::LastOrphan
ULONG LastOrphan
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ext.h:98
_ExtSuperBlock::RBlocksCountLo
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ext.h:57
_ExtSuperBlock::FeatureROCompat
ULONG FeatureROCompat
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ext.h:87
_ExtSuperBlock::MntCount
USHORT MntCount
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ext.h:68
_ExtSuperBlock::InodeSize
USHORT InodeSize
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ext.h:83
_ExtSuperBlock::State
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ext.h:71
_ExtSuperBlock::JournalUUID
UCHAR JournalUUID[16]
Definition:
ext.h:95
_ExtSuperBlock::LastMounted
CHAR LastMounted[64]
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ext.h:90
_ExtSuperBlock::Errors
USHORT Errors
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ext.h:72
_ExtSuperBlock::FreeBlocksCountLo
ULONG FreeBlocksCountLo
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ext.h:58
_ExtSuperBlock::ReservedGdtBlocks
USHORT ReservedGdtBlocks
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ext.h:94
_ExtSuperBlock::MinorRevisionLevel
USHORT MinorRevisionLevel
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ext.h:73
_ExtSuperBlock::FirstDataBlock
ULONG FirstDataBlock
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ext.h:60
_ExtSuperBlock::PreallocBlocks
UCHAR PreallocBlocks
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ext.h:92
_ExtSuperBlock::JournalDev
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ext.h:97
_ExtSuperBlock::JournalInum
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ext.h:96
tagDEVVTBL
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fs.h:25
PULONG
uint32_t * PULONG
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typedefs.h:59
ULONG
uint32_t ULONG
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typedefs.h:59
ULONGLONG
uint64_t ULONGLONG
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typedefs.h:67
Reserved
_Reserved_ PVOID Reserved
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winddi.h:3974
UCHAR
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xmlstorage.h:181
CHAR
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