| /* |
| * 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 |
| * |
| * This program/include file is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as published |
| * by the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program/include file is distributed in the hope that it will be |
| * useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program (in the main directory of the Linux-NTFS |
| * distribution in the file COPYING); if not, write to the Free Software |
| * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #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 */ |