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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 | /* SPDX-License-Identifier: GPL-2.0-or-later */ /* * 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 */ #ifndef _LINUX_NTFS_VOLUME_H #define _LINUX_NTFS_VOLUME_H #include <linux/rwsem.h> #include <linux/uidgid.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. */ kuid_t uid; /* uid that files will be mounted as. */ kgid_t gid; /* gid that files will be mounted as. */ umode_t fmask; /* The mask for file permissions. */ umode_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 */ |