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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/*
* volume.h - Defines for volume structures in NTFS Linux kernel driver. Part
* of the Linux-NTFS project.
*
* Copyright (c) 2001-2006 Anton Altaparmakov
* Copyright (c) 2002 Richard Russon
*
* This program/include file 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 2 of the License, or
* (at your option) any later version.
*
* This program/include file 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 (in the main directory of the Linux-NTFS
* distribution in the file COPYING); if not, write to the Free Software
* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _LINUX_NTFS_VOLUME_H
#define _LINUX_NTFS_VOLUME_H
#include <linux/rwsem.h>
#include "types.h"
#include "layout.h"
/*
* The NTFS in memory super block structure.
*/
typedef struct {
/*
* FIXME: Reorder to have commonly used together element within the
* same cache line, aiming at a cache line size of 32 bytes. Aim for
* 64 bytes for less commonly used together elements. Put most commonly
* used elements to front of structure. Obviously do this only when the
* structure has stabilized... (AIA)
*/
/* Device specifics. */
struct super_block *sb; /* Pointer back to the super_block. */
LCN nr_blocks; /* Number of sb->s_blocksize bytes
sized blocks on the device. */
/* Configuration provided by user at mount time. */
unsigned long flags; /* Miscellaneous flags, see below. */
uid_t uid; /* uid that files will be mounted as. */
gid_t gid; /* gid that files will be mounted as. */
mode_t fmask; /* The mask for file permissions. */
mode_t dmask; /* The mask for directory
permissions. */
u8 mft_zone_multiplier; /* Initial mft zone multiplier. */
u8 on_errors; /* What to do on filesystem errors. */
/* NTFS bootsector provided information. */
u16 sector_size; /* in bytes */
u8 sector_size_bits; /* log2(sector_size) */
u32 cluster_size; /* in bytes */
u32 cluster_size_mask; /* cluster_size - 1 */
u8 cluster_size_bits; /* log2(cluster_size) */
u32 mft_record_size; /* in bytes */
u32 mft_record_size_mask; /* mft_record_size - 1 */
u8 mft_record_size_bits; /* log2(mft_record_size) */
u32 index_record_size; /* in bytes */
u32 index_record_size_mask; /* index_record_size - 1 */
u8 index_record_size_bits; /* log2(index_record_size) */
LCN nr_clusters; /* Volume size in clusters == number of
bits in lcn bitmap. */
LCN mft_lcn; /* Cluster location of mft data. */
LCN mftmirr_lcn; /* Cluster location of copy of mft. */
u64 serial_no; /* The volume serial number. */
/* Mount specific NTFS information. */
u32 upcase_len; /* Number of entries in upcase[]. */
ntfschar *upcase; /* The upcase table. */
s32 attrdef_size; /* Size of the attribute definition
table in bytes. */
ATTR_DEF *attrdef; /* Table of attribute definitions.
Obtained from FILE_AttrDef. */
#ifdef NTFS_RW
/* Variables used by the cluster and mft allocators. */
s64 mft_data_pos; /* Mft record number at which to
allocate the next mft record. */
LCN mft_zone_start; /* First cluster of the mft zone. */
LCN mft_zone_end; /* First cluster beyond the mft zone. */
LCN mft_zone_pos; /* Current position in the mft zone. */
LCN data1_zone_pos; /* Current position in the first data
zone. */
LCN data2_zone_pos; /* Current position in the second data
zone. */
#endif /* NTFS_RW */
struct inode *mft_ino; /* The VFS inode of $MFT. */
struct inode *mftbmp_ino; /* Attribute inode for $MFT/$BITMAP. */
struct rw_semaphore mftbmp_lock; /* Lock for serializing accesses to the
mft record bitmap ($MFT/$BITMAP). */
#ifdef NTFS_RW
struct inode *mftmirr_ino; /* The VFS inode of $MFTMirr. */
int mftmirr_size; /* Size of mft mirror in mft records. */
struct inode *logfile_ino; /* The VFS inode of $LogFile. */
#endif /* NTFS_RW */
struct inode *lcnbmp_ino; /* The VFS inode of $Bitmap. */
struct rw_semaphore lcnbmp_lock; /* Lock for serializing accesses to the
cluster bitmap ($Bitmap/$DATA). */
struct inode *vol_ino; /* The VFS inode of $Volume. */
VOLUME_FLAGS vol_flags; /* Volume flags. */
u8 major_ver; /* Ntfs major version of volume. */
u8 minor_ver; /* Ntfs minor version of volume. */
struct inode *root_ino; /* The VFS inode of the root
directory. */
struct inode *secure_ino; /* The VFS inode of $Secure (NTFS3.0+
only, otherwise NULL). */
struct inode *extend_ino; /* The VFS inode of $Extend (NTFS3.0+
only, otherwise NULL). */
#ifdef NTFS_RW
/* $Quota stuff is NTFS3.0+ specific. Unused/NULL otherwise. */
struct inode *quota_ino; /* The VFS inode of $Quota. */
struct inode *quota_q_ino; /* Attribute inode for $Quota/$Q. */
/* $UsnJrnl stuff is NTFS3.0+ specific. Unused/NULL otherwise. */
struct inode *usnjrnl_ino; /* The VFS inode of $UsnJrnl. */
struct inode *usnjrnl_max_ino; /* Attribute inode for $UsnJrnl/$Max. */
struct inode *usnjrnl_j_ino; /* Attribute inode for $UsnJrnl/$J. */
#endif /* NTFS_RW */
struct nls_table *nls_map;
} ntfs_volume;
/*
* Defined bits for the flags field in the ntfs_volume structure.
*/
typedef enum {
NV_Errors, /* 1: Volume has errors, prevent remount rw. */
NV_ShowSystemFiles, /* 1: Return system files in ntfs_readdir(). */
NV_CaseSensitive, /* 1: Treat file names as case sensitive and
create filenames in the POSIX namespace.
Otherwise be case insensitive but still
create file names in POSIX namespace. */
NV_LogFileEmpty, /* 1: $LogFile journal is empty. */
NV_QuotaOutOfDate, /* 1: $Quota is out of date. */
NV_UsnJrnlStamped, /* 1: $UsnJrnl has been stamped. */
NV_SparseEnabled, /* 1: May create sparse files. */
} ntfs_volume_flags;
/*
* Macro tricks to expand the NVolFoo(), NVolSetFoo(), and NVolClearFoo()
* functions.
*/
#define DEFINE_NVOL_BIT_OPS(flag) \
static inline int NVol##flag(ntfs_volume *vol) \
{ \
return test_bit(NV_##flag, &(vol)->flags); \
} \
static inline void NVolSet##flag(ntfs_volume *vol) \
{ \
set_bit(NV_##flag, &(vol)->flags); \
} \
static inline void NVolClear##flag(ntfs_volume *vol) \
{ \
clear_bit(NV_##flag, &(vol)->flags); \
}
/* Emit the ntfs volume bitops functions. */
DEFINE_NVOL_BIT_OPS(Errors)
DEFINE_NVOL_BIT_OPS(ShowSystemFiles)
DEFINE_NVOL_BIT_OPS(CaseSensitive)
DEFINE_NVOL_BIT_OPS(LogFileEmpty)
DEFINE_NVOL_BIT_OPS(QuotaOutOfDate)
DEFINE_NVOL_BIT_OPS(UsnJrnlStamped)
DEFINE_NVOL_BIT_OPS(SparseEnabled)
#endif /* _LINUX_NTFS_VOLUME_H */
|
