mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-06 02:24:14 +08:00
b29f7751c9
Cc: Anton Altaparmakov <anton@tuxera.com> Acked-by: Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
179 lines
6.8 KiB
C
179 lines
6.8 KiB
C
/*
|
|
* 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 */
|