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1da177e4 LT |
1 | /* |
2 | * volume.h - Defines for volume structures in NTFS Linux kernel driver. Part | |
3 | * of the Linux-NTFS project. | |
4 | * | |
1cf3109f | 5 | * Copyright (c) 2001-2006 Anton Altaparmakov |
1da177e4 LT |
6 | * Copyright (c) 2002 Richard Russon |
7 | * | |
8 | * This program/include file is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public License as published | |
10 | * by the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program/include file is distributed in the hope that it will be | |
14 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
15 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program (in the main directory of the Linux-NTFS | |
20 | * distribution in the file COPYING); if not, write to the Free Software | |
21 | * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | #ifndef _LINUX_NTFS_VOLUME_H | |
25 | #define _LINUX_NTFS_VOLUME_H | |
26 | ||
27 | #include <linux/rwsem.h> | |
28 | ||
29 | #include "types.h" | |
30 | #include "layout.h" | |
31 | ||
32 | /* | |
33 | * The NTFS in memory super block structure. | |
34 | */ | |
35 | typedef struct { | |
36 | /* | |
37 | * FIXME: Reorder to have commonly used together element within the | |
38 | * same cache line, aiming at a cache line size of 32 bytes. Aim for | |
39 | * 64 bytes for less commonly used together elements. Put most commonly | |
40 | * used elements to front of structure. Obviously do this only when the | |
41 | * structure has stabilized... (AIA) | |
42 | */ | |
43 | /* Device specifics. */ | |
1cf3109f AA |
44 | struct super_block *sb; /* Pointer back to the super_block. */ |
45 | LCN nr_blocks; /* Number of sb->s_blocksize bytes | |
1da177e4 LT |
46 | sized blocks on the device. */ |
47 | /* Configuration provided by user at mount time. */ | |
48 | unsigned long flags; /* Miscellaneous flags, see below. */ | |
49 | uid_t uid; /* uid that files will be mounted as. */ | |
50 | gid_t gid; /* gid that files will be mounted as. */ | |
51 | mode_t fmask; /* The mask for file permissions. */ | |
52 | mode_t dmask; /* The mask for directory | |
53 | permissions. */ | |
54 | u8 mft_zone_multiplier; /* Initial mft zone multiplier. */ | |
c002f425 | 55 | u8 on_errors; /* What to do on filesystem errors. */ |
1da177e4 LT |
56 | /* NTFS bootsector provided information. */ |
57 | u16 sector_size; /* in bytes */ | |
58 | u8 sector_size_bits; /* log2(sector_size) */ | |
59 | u32 cluster_size; /* in bytes */ | |
60 | u32 cluster_size_mask; /* cluster_size - 1 */ | |
61 | u8 cluster_size_bits; /* log2(cluster_size) */ | |
62 | u32 mft_record_size; /* in bytes */ | |
63 | u32 mft_record_size_mask; /* mft_record_size - 1 */ | |
64 | u8 mft_record_size_bits; /* log2(mft_record_size) */ | |
65 | u32 index_record_size; /* in bytes */ | |
66 | u32 index_record_size_mask; /* index_record_size - 1 */ | |
67 | u8 index_record_size_bits; /* log2(index_record_size) */ | |
68 | LCN nr_clusters; /* Volume size in clusters == number of | |
69 | bits in lcn bitmap. */ | |
70 | LCN mft_lcn; /* Cluster location of mft data. */ | |
71 | LCN mftmirr_lcn; /* Cluster location of copy of mft. */ | |
72 | u64 serial_no; /* The volume serial number. */ | |
73 | /* Mount specific NTFS information. */ | |
74 | u32 upcase_len; /* Number of entries in upcase[]. */ | |
75 | ntfschar *upcase; /* The upcase table. */ | |
76 | ||
77 | s32 attrdef_size; /* Size of the attribute definition | |
78 | table in bytes. */ | |
79 | ATTR_DEF *attrdef; /* Table of attribute definitions. | |
80 | Obtained from FILE_AttrDef. */ | |
81 | ||
82 | #ifdef NTFS_RW | |
83 | /* Variables used by the cluster and mft allocators. */ | |
84 | s64 mft_data_pos; /* Mft record number at which to | |
85 | allocate the next mft record. */ | |
86 | LCN mft_zone_start; /* First cluster of the mft zone. */ | |
87 | LCN mft_zone_end; /* First cluster beyond the mft zone. */ | |
88 | LCN mft_zone_pos; /* Current position in the mft zone. */ | |
89 | LCN data1_zone_pos; /* Current position in the first data | |
90 | zone. */ | |
91 | LCN data2_zone_pos; /* Current position in the second data | |
92 | zone. */ | |
93 | #endif /* NTFS_RW */ | |
94 | ||
95 | struct inode *mft_ino; /* The VFS inode of $MFT. */ | |
96 | ||
97 | struct inode *mftbmp_ino; /* Attribute inode for $MFT/$BITMAP. */ | |
98 | struct rw_semaphore mftbmp_lock; /* Lock for serializing accesses to the | |
99 | mft record bitmap ($MFT/$BITMAP). */ | |
100 | #ifdef NTFS_RW | |
101 | struct inode *mftmirr_ino; /* The VFS inode of $MFTMirr. */ | |
102 | int mftmirr_size; /* Size of mft mirror in mft records. */ | |
103 | ||
104 | struct inode *logfile_ino; /* The VFS inode of $LogFile. */ | |
105 | #endif /* NTFS_RW */ | |
106 | ||
107 | struct inode *lcnbmp_ino; /* The VFS inode of $Bitmap. */ | |
108 | struct rw_semaphore lcnbmp_lock; /* Lock for serializing accesses to the | |
109 | cluster bitmap ($Bitmap/$DATA). */ | |
110 | ||
111 | struct inode *vol_ino; /* The VFS inode of $Volume. */ | |
112 | VOLUME_FLAGS vol_flags; /* Volume flags. */ | |
113 | u8 major_ver; /* Ntfs major version of volume. */ | |
114 | u8 minor_ver; /* Ntfs minor version of volume. */ | |
115 | ||
116 | struct inode *root_ino; /* The VFS inode of the root | |
117 | directory. */ | |
118 | struct inode *secure_ino; /* The VFS inode of $Secure (NTFS3.0+ | |
119 | only, otherwise NULL). */ | |
120 | struct inode *extend_ino; /* The VFS inode of $Extend (NTFS3.0+ | |
121 | only, otherwise NULL). */ | |
122 | #ifdef NTFS_RW | |
123 | /* $Quota stuff is NTFS3.0+ specific. Unused/NULL otherwise. */ | |
124 | struct inode *quota_ino; /* The VFS inode of $Quota. */ | |
125 | struct inode *quota_q_ino; /* Attribute inode for $Quota/$Q. */ | |
3f2faef0 AA |
126 | /* $UsnJrnl stuff is NTFS3.0+ specific. Unused/NULL otherwise. */ |
127 | struct inode *usnjrnl_ino; /* The VFS inode of $UsnJrnl. */ | |
128 | struct inode *usnjrnl_max_ino; /* Attribute inode for $UsnJrnl/$Max. */ | |
129 | struct inode *usnjrnl_j_ino; /* Attribute inode for $UsnJrnl/$J. */ | |
1da177e4 LT |
130 | #endif /* NTFS_RW */ |
131 | struct nls_table *nls_map; | |
132 | } ntfs_volume; | |
133 | ||
134 | /* | |
135 | * Defined bits for the flags field in the ntfs_volume structure. | |
136 | */ | |
137 | typedef enum { | |
138 | NV_Errors, /* 1: Volume has errors, prevent remount rw. */ | |
139 | NV_ShowSystemFiles, /* 1: Return system files in ntfs_readdir(). */ | |
140 | NV_CaseSensitive, /* 1: Treat file names as case sensitive and | |
141 | create filenames in the POSIX namespace. | |
1cf3109f AA |
142 | Otherwise be case insensitive but still |
143 | create file names in POSIX namespace. */ | |
1da177e4 LT |
144 | NV_LogFileEmpty, /* 1: $LogFile journal is empty. */ |
145 | NV_QuotaOutOfDate, /* 1: $Quota is out of date. */ | |
3f2faef0 | 146 | NV_UsnJrnlStamped, /* 1: $UsnJrnl has been stamped. */ |
c002f425 | 147 | NV_SparseEnabled, /* 1: May create sparse files. */ |
1da177e4 LT |
148 | } ntfs_volume_flags; |
149 | ||
150 | /* | |
151 | * Macro tricks to expand the NVolFoo(), NVolSetFoo(), and NVolClearFoo() | |
152 | * functions. | |
153 | */ | |
1cf3109f | 154 | #define DEFINE_NVOL_BIT_OPS(flag) \ |
1da177e4 LT |
155 | static inline int NVol##flag(ntfs_volume *vol) \ |
156 | { \ | |
157 | return test_bit(NV_##flag, &(vol)->flags); \ | |
158 | } \ | |
159 | static inline void NVolSet##flag(ntfs_volume *vol) \ | |
160 | { \ | |
161 | set_bit(NV_##flag, &(vol)->flags); \ | |
162 | } \ | |
163 | static inline void NVolClear##flag(ntfs_volume *vol) \ | |
164 | { \ | |
165 | clear_bit(NV_##flag, &(vol)->flags); \ | |
166 | } | |
167 | ||
168 | /* Emit the ntfs volume bitops functions. */ | |
1cf3109f AA |
169 | DEFINE_NVOL_BIT_OPS(Errors) |
170 | DEFINE_NVOL_BIT_OPS(ShowSystemFiles) | |
171 | DEFINE_NVOL_BIT_OPS(CaseSensitive) | |
172 | DEFINE_NVOL_BIT_OPS(LogFileEmpty) | |
173 | DEFINE_NVOL_BIT_OPS(QuotaOutOfDate) | |
174 | DEFINE_NVOL_BIT_OPS(UsnJrnlStamped) | |
175 | DEFINE_NVOL_BIT_OPS(SparseEnabled) | |
1da177e4 LT |
176 | |
177 | #endif /* _LINUX_NTFS_VOLUME_H */ |