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0001 /* SPDX-License-Identifier: GPL-2.0-or-later */ 0002 /* 0003 * volume.h - Defines for volume structures in NTFS Linux kernel driver. Part 0004 * of the Linux-NTFS project. 0005 * 0006 * Copyright (c) 2001-2006 Anton Altaparmakov 0007 * Copyright (c) 2002 Richard Russon 0008 */ 0009 0010 #ifndef _LINUX_NTFS_VOLUME_H 0011 #define _LINUX_NTFS_VOLUME_H 0012 0013 #include <linux/rwsem.h> 0014 #include <linux/uidgid.h> 0015 0016 #include "types.h" 0017 #include "layout.h" 0018 0019 /* 0020 * The NTFS in memory super block structure. 0021 */ 0022 typedef struct { 0023 /* 0024 * FIXME: Reorder to have commonly used together element within the 0025 * same cache line, aiming at a cache line size of 32 bytes. Aim for 0026 * 64 bytes for less commonly used together elements. Put most commonly 0027 * used elements to front of structure. Obviously do this only when the 0028 * structure has stabilized... (AIA) 0029 */ 0030 /* Device specifics. */ 0031 struct super_block *sb; /* Pointer back to the super_block. */ 0032 LCN nr_blocks; /* Number of sb->s_blocksize bytes 0033 sized blocks on the device. */ 0034 /* Configuration provided by user at mount time. */ 0035 unsigned long flags; /* Miscellaneous flags, see below. */ 0036 kuid_t uid; /* uid that files will be mounted as. */ 0037 kgid_t gid; /* gid that files will be mounted as. */ 0038 umode_t fmask; /* The mask for file permissions. */ 0039 umode_t dmask; /* The mask for directory 0040 permissions. */ 0041 u8 mft_zone_multiplier; /* Initial mft zone multiplier. */ 0042 u8 on_errors; /* What to do on filesystem errors. */ 0043 /* NTFS bootsector provided information. */ 0044 u16 sector_size; /* in bytes */ 0045 u8 sector_size_bits; /* log2(sector_size) */ 0046 u32 cluster_size; /* in bytes */ 0047 u32 cluster_size_mask; /* cluster_size - 1 */ 0048 u8 cluster_size_bits; /* log2(cluster_size) */ 0049 u32 mft_record_size; /* in bytes */ 0050 u32 mft_record_size_mask; /* mft_record_size - 1 */ 0051 u8 mft_record_size_bits; /* log2(mft_record_size) */ 0052 u32 index_record_size; /* in bytes */ 0053 u32 index_record_size_mask; /* index_record_size - 1 */ 0054 u8 index_record_size_bits; /* log2(index_record_size) */ 0055 LCN nr_clusters; /* Volume size in clusters == number of 0056 bits in lcn bitmap. */ 0057 LCN mft_lcn; /* Cluster location of mft data. */ 0058 LCN mftmirr_lcn; /* Cluster location of copy of mft. */ 0059 u64 serial_no; /* The volume serial number. */ 0060 /* Mount specific NTFS information. */ 0061 u32 upcase_len; /* Number of entries in upcase[]. */ 0062 ntfschar *upcase; /* The upcase table. */ 0063 0064 s32 attrdef_size; /* Size of the attribute definition 0065 table in bytes. */ 0066 ATTR_DEF *attrdef; /* Table of attribute definitions. 0067 Obtained from FILE_AttrDef. */ 0068 0069 #ifdef NTFS_RW 0070 /* Variables used by the cluster and mft allocators. */ 0071 s64 mft_data_pos; /* Mft record number at which to 0072 allocate the next mft record. */ 0073 LCN mft_zone_start; /* First cluster of the mft zone. */ 0074 LCN mft_zone_end; /* First cluster beyond the mft zone. */ 0075 LCN mft_zone_pos; /* Current position in the mft zone. */ 0076 LCN data1_zone_pos; /* Current position in the first data 0077 zone. */ 0078 LCN data2_zone_pos; /* Current position in the second data 0079 zone. */ 0080 #endif /* NTFS_RW */ 0081 0082 struct inode *mft_ino; /* The VFS inode of $MFT. */ 0083 0084 struct inode *mftbmp_ino; /* Attribute inode for $MFT/$BITMAP. */ 0085 struct rw_semaphore mftbmp_lock; /* Lock for serializing accesses to the 0086 mft record bitmap ($MFT/$BITMAP). */ 0087 #ifdef NTFS_RW 0088 struct inode *mftmirr_ino; /* The VFS inode of $MFTMirr. */ 0089 int mftmirr_size; /* Size of mft mirror in mft records. */ 0090 0091 struct inode *logfile_ino; /* The VFS inode of $LogFile. */ 0092 #endif /* NTFS_RW */ 0093 0094 struct inode *lcnbmp_ino; /* The VFS inode of $Bitmap. */ 0095 struct rw_semaphore lcnbmp_lock; /* Lock for serializing accesses to the 0096 cluster bitmap ($Bitmap/$DATA). */ 0097 0098 struct inode *vol_ino; /* The VFS inode of $Volume. */ 0099 VOLUME_FLAGS vol_flags; /* Volume flags. */ 0100 u8 major_ver; /* Ntfs major version of volume. */ 0101 u8 minor_ver; /* Ntfs minor version of volume. */ 0102 0103 struct inode *root_ino; /* The VFS inode of the root 0104 directory. */ 0105 struct inode *secure_ino; /* The VFS inode of $Secure (NTFS3.0+ 0106 only, otherwise NULL). */ 0107 struct inode *extend_ino; /* The VFS inode of $Extend (NTFS3.0+ 0108 only, otherwise NULL). */ 0109 #ifdef NTFS_RW 0110 /* $Quota stuff is NTFS3.0+ specific. Unused/NULL otherwise. */ 0111 struct inode *quota_ino; /* The VFS inode of $Quota. */ 0112 struct inode *quota_q_ino; /* Attribute inode for $Quota/$Q. */ 0113 /* $UsnJrnl stuff is NTFS3.0+ specific. Unused/NULL otherwise. */ 0114 struct inode *usnjrnl_ino; /* The VFS inode of $UsnJrnl. */ 0115 struct inode *usnjrnl_max_ino; /* Attribute inode for $UsnJrnl/$Max. */ 0116 struct inode *usnjrnl_j_ino; /* Attribute inode for $UsnJrnl/$J. */ 0117 #endif /* NTFS_RW */ 0118 struct nls_table *nls_map; 0119 } ntfs_volume; 0120 0121 /* 0122 * Defined bits for the flags field in the ntfs_volume structure. 0123 */ 0124 typedef enum { 0125 NV_Errors, /* 1: Volume has errors, prevent remount rw. */ 0126 NV_ShowSystemFiles, /* 1: Return system files in ntfs_readdir(). */ 0127 NV_CaseSensitive, /* 1: Treat file names as case sensitive and 0128 create filenames in the POSIX namespace. 0129 Otherwise be case insensitive but still 0130 create file names in POSIX namespace. */ 0131 NV_LogFileEmpty, /* 1: $LogFile journal is empty. */ 0132 NV_QuotaOutOfDate, /* 1: $Quota is out of date. */ 0133 NV_UsnJrnlStamped, /* 1: $UsnJrnl has been stamped. */ 0134 NV_SparseEnabled, /* 1: May create sparse files. */ 0135 } ntfs_volume_flags; 0136 0137 /* 0138 * Macro tricks to expand the NVolFoo(), NVolSetFoo(), and NVolClearFoo() 0139 * functions. 0140 */ 0141 #define DEFINE_NVOL_BIT_OPS(flag) \ 0142 static inline int NVol##flag(ntfs_volume *vol) \ 0143 { \ 0144 return test_bit(NV_##flag, &(vol)->flags); \ 0145 } \ 0146 static inline void NVolSet##flag(ntfs_volume *vol) \ 0147 { \ 0148 set_bit(NV_##flag, &(vol)->flags); \ 0149 } \ 0150 static inline void NVolClear##flag(ntfs_volume *vol) \ 0151 { \ 0152 clear_bit(NV_##flag, &(vol)->flags); \ 0153 } 0154 0155 /* Emit the ntfs volume bitops functions. */ 0156 DEFINE_NVOL_BIT_OPS(Errors) 0157 DEFINE_NVOL_BIT_OPS(ShowSystemFiles) 0158 DEFINE_NVOL_BIT_OPS(CaseSensitive) 0159 DEFINE_NVOL_BIT_OPS(LogFileEmpty) 0160 DEFINE_NVOL_BIT_OPS(QuotaOutOfDate) 0161 DEFINE_NVOL_BIT_OPS(UsnJrnlStamped) 0162 DEFINE_NVOL_BIT_OPS(SparseEnabled) 0163 0164 #endif /* _LINUX_NTFS_VOLUME_H */
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