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Diffstat (limited to 'fs/ntfs/volume.h')
| -rw-r--r-- | fs/ntfs/volume.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/fs/ntfs/volume.h b/fs/ntfs/volume.h new file mode 100644 index 000000000..4f579b02b --- /dev/null +++ b/fs/ntfs/volume.h @@ -0,0 +1,178 @@ +/* + * 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 */ |