1 /* 2 * volume.h - Defines for volume structures in NTFS Linux kernel driver. Part 3 * of the Linux-NTFS project. 4 * 5 * Copyright (c) 2001-2006 Anton Altaparmakov 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. */ 44 struct super_block *sb; /* Pointer back to the super_block. */ 45 LCN nr_blocks; /* Number of sb->s_blocksize bytes 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 umode_t fmask; /* The mask for file permissions. */ 52 umode_t dmask; /* The mask for directory 53 permissions. */ 54 u8 mft_zone_multiplier; /* Initial mft zone multiplier. */ 55 u8 on_errors; /* What to do on filesystem errors. */ 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. */ 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. */ 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. 142 Otherwise be case insensitive but still 143 create file names in POSIX namespace. */ 144 NV_LogFileEmpty, /* 1: $LogFile journal is empty. */ 145 NV_QuotaOutOfDate, /* 1: $Quota is out of date. */ 146 NV_UsnJrnlStamped, /* 1: $UsnJrnl has been stamped. */ 147 NV_SparseEnabled, /* 1: May create sparse files. */ 148 } ntfs_volume_flags; 149 150 /* 151 * Macro tricks to expand the NVolFoo(), NVolSetFoo(), and NVolClearFoo() 152 * functions. 153 */ 154 #define DEFINE_NVOL_BIT_OPS(flag) \ 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. */ 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) 176 177 #endif /* _LINUX_NTFS_VOLUME_H */ 178