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164 lines
6.1 KiB
164 lines
6.1 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
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/* |
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* volume.h - Defines for volume structures in NTFS Linux kernel driver. Part |
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* of the Linux-NTFS project. |
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* |
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* Copyright (c) 2001-2006 Anton Altaparmakov |
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* Copyright (c) 2002 Richard Russon |
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*/ |
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#ifndef _LINUX_NTFS_VOLUME_H |
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#define _LINUX_NTFS_VOLUME_H |
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#include <linux/rwsem.h> |
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#include <linux/uidgid.h> |
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#include "types.h" |
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#include "layout.h" |
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/* |
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* The NTFS in memory super block structure. |
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*/ |
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typedef struct { |
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/* |
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* FIXME: Reorder to have commonly used together element within the |
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* same cache line, aiming at a cache line size of 32 bytes. Aim for |
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* 64 bytes for less commonly used together elements. Put most commonly |
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* used elements to front of structure. Obviously do this only when the |
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* structure has stabilized... (AIA) |
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*/ |
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/* Device specifics. */ |
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struct super_block *sb; /* Pointer back to the super_block. */ |
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LCN nr_blocks; /* Number of sb->s_blocksize bytes |
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sized blocks on the device. */ |
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/* Configuration provided by user at mount time. */ |
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unsigned long flags; /* Miscellaneous flags, see below. */ |
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kuid_t uid; /* uid that files will be mounted as. */ |
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kgid_t gid; /* gid that files will be mounted as. */ |
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umode_t fmask; /* The mask for file permissions. */ |
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umode_t dmask; /* The mask for directory |
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permissions. */ |
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u8 mft_zone_multiplier; /* Initial mft zone multiplier. */ |
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u8 on_errors; /* What to do on filesystem errors. */ |
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/* NTFS bootsector provided information. */ |
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u16 sector_size; /* in bytes */ |
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u8 sector_size_bits; /* log2(sector_size) */ |
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u32 cluster_size; /* in bytes */ |
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u32 cluster_size_mask; /* cluster_size - 1 */ |
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u8 cluster_size_bits; /* log2(cluster_size) */ |
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u32 mft_record_size; /* in bytes */ |
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u32 mft_record_size_mask; /* mft_record_size - 1 */ |
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u8 mft_record_size_bits; /* log2(mft_record_size) */ |
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u32 index_record_size; /* in bytes */ |
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u32 index_record_size_mask; /* index_record_size - 1 */ |
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u8 index_record_size_bits; /* log2(index_record_size) */ |
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LCN nr_clusters; /* Volume size in clusters == number of |
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bits in lcn bitmap. */ |
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LCN mft_lcn; /* Cluster location of mft data. */ |
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LCN mftmirr_lcn; /* Cluster location of copy of mft. */ |
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u64 serial_no; /* The volume serial number. */ |
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/* Mount specific NTFS information. */ |
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u32 upcase_len; /* Number of entries in upcase[]. */ |
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ntfschar *upcase; /* The upcase table. */ |
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s32 attrdef_size; /* Size of the attribute definition |
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table in bytes. */ |
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ATTR_DEF *attrdef; /* Table of attribute definitions. |
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Obtained from FILE_AttrDef. */ |
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#ifdef NTFS_RW |
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/* Variables used by the cluster and mft allocators. */ |
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s64 mft_data_pos; /* Mft record number at which to |
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allocate the next mft record. */ |
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LCN mft_zone_start; /* First cluster of the mft zone. */ |
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LCN mft_zone_end; /* First cluster beyond the mft zone. */ |
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LCN mft_zone_pos; /* Current position in the mft zone. */ |
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LCN data1_zone_pos; /* Current position in the first data |
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zone. */ |
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LCN data2_zone_pos; /* Current position in the second data |
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zone. */ |
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#endif /* NTFS_RW */ |
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struct inode *mft_ino; /* The VFS inode of $MFT. */ |
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struct inode *mftbmp_ino; /* Attribute inode for $MFT/$BITMAP. */ |
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struct rw_semaphore mftbmp_lock; /* Lock for serializing accesses to the |
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mft record bitmap ($MFT/$BITMAP). */ |
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#ifdef NTFS_RW |
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struct inode *mftmirr_ino; /* The VFS inode of $MFTMirr. */ |
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int mftmirr_size; /* Size of mft mirror in mft records. */ |
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struct inode *logfile_ino; /* The VFS inode of $LogFile. */ |
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#endif /* NTFS_RW */ |
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struct inode *lcnbmp_ino; /* The VFS inode of $Bitmap. */ |
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struct rw_semaphore lcnbmp_lock; /* Lock for serializing accesses to the |
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cluster bitmap ($Bitmap/$DATA). */ |
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struct inode *vol_ino; /* The VFS inode of $Volume. */ |
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VOLUME_FLAGS vol_flags; /* Volume flags. */ |
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u8 major_ver; /* Ntfs major version of volume. */ |
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u8 minor_ver; /* Ntfs minor version of volume. */ |
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struct inode *root_ino; /* The VFS inode of the root |
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directory. */ |
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struct inode *secure_ino; /* The VFS inode of $Secure (NTFS3.0+ |
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only, otherwise NULL). */ |
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struct inode *extend_ino; /* The VFS inode of $Extend (NTFS3.0+ |
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only, otherwise NULL). */ |
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#ifdef NTFS_RW |
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/* $Quota stuff is NTFS3.0+ specific. Unused/NULL otherwise. */ |
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struct inode *quota_ino; /* The VFS inode of $Quota. */ |
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struct inode *quota_q_ino; /* Attribute inode for $Quota/$Q. */ |
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/* $UsnJrnl stuff is NTFS3.0+ specific. Unused/NULL otherwise. */ |
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struct inode *usnjrnl_ino; /* The VFS inode of $UsnJrnl. */ |
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struct inode *usnjrnl_max_ino; /* Attribute inode for $UsnJrnl/$Max. */ |
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struct inode *usnjrnl_j_ino; /* Attribute inode for $UsnJrnl/$J. */ |
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#endif /* NTFS_RW */ |
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struct nls_table *nls_map; |
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} ntfs_volume; |
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/* |
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* Defined bits for the flags field in the ntfs_volume structure. |
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*/ |
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typedef enum { |
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NV_Errors, /* 1: Volume has errors, prevent remount rw. */ |
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NV_ShowSystemFiles, /* 1: Return system files in ntfs_readdir(). */ |
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NV_CaseSensitive, /* 1: Treat file names as case sensitive and |
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create filenames in the POSIX namespace. |
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Otherwise be case insensitive but still |
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create file names in POSIX namespace. */ |
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NV_LogFileEmpty, /* 1: $LogFile journal is empty. */ |
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NV_QuotaOutOfDate, /* 1: $Quota is out of date. */ |
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NV_UsnJrnlStamped, /* 1: $UsnJrnl has been stamped. */ |
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NV_SparseEnabled, /* 1: May create sparse files. */ |
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} ntfs_volume_flags; |
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/* |
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* Macro tricks to expand the NVolFoo(), NVolSetFoo(), and NVolClearFoo() |
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* functions. |
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*/ |
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#define DEFINE_NVOL_BIT_OPS(flag) \ |
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static inline int NVol##flag(ntfs_volume *vol) \ |
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{ \ |
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return test_bit(NV_##flag, &(vol)->flags); \ |
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} \ |
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static inline void NVolSet##flag(ntfs_volume *vol) \ |
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{ \ |
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set_bit(NV_##flag, &(vol)->flags); \ |
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} \ |
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static inline void NVolClear##flag(ntfs_volume *vol) \ |
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{ \ |
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clear_bit(NV_##flag, &(vol)->flags); \ |
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} |
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/* Emit the ntfs volume bitops functions. */ |
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DEFINE_NVOL_BIT_OPS(Errors) |
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DEFINE_NVOL_BIT_OPS(ShowSystemFiles) |
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DEFINE_NVOL_BIT_OPS(CaseSensitive) |
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DEFINE_NVOL_BIT_OPS(LogFileEmpty) |
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DEFINE_NVOL_BIT_OPS(QuotaOutOfDate) |
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DEFINE_NVOL_BIT_OPS(UsnJrnlStamped) |
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DEFINE_NVOL_BIT_OPS(SparseEnabled) |
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#endif /* _LINUX_NTFS_VOLUME_H */
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