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230 lines
8.9 KiB
C
230 lines
8.9 KiB
C
/*
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* inode.h - Defines for NTFS inode handling. Originated from the Linux-NTFS project.
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*
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* Copyright (c) 2001-2004 Anton Altaparmakov
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* Copyright (c) 2004-2007 Yura Pakhuchiy
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* Copyright (c) 2004-2005 Richard Russon
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* Copyright (c) 2006-2008 Szabolcs Szakacsits
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*
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* This program/include file is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program/include file is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (in the main directory of the NTFS-3G
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* distribution in the file COPYING); if not, write to the Free Software
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* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _NTFS_INODE_H
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#define _NTFS_INODE_H
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/* Forward declaration */
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typedef struct _ntfs_inode ntfs_inode;
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#include "types.h"
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#include "layout.h"
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#include "support.h"
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#include "volume.h"
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#include "ntfstime.h"
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/**
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* enum ntfs_inode_state_bits -
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*
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* Defined bits for the state field in the ntfs_inode structure.
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* (f) = files only, (d) = directories only
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*/
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typedef enum
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{
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NI_Dirty, /* 1: Mft record needs to be written to disk. */
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/* The NI_AttrList* tests only make sense for base inodes. */
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NI_AttrList, /* 1: Mft record contains an attribute list. */
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NI_AttrListDirty, /* 1: Attribute list needs to be written to the
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mft record and then to disk. */
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NI_FileNameDirty, /* 1: FILE_NAME attributes need to be updated
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in the index. */
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NI_v3_Extensions, /* 1: JPA v3.x extensions present. */
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NI_TimesSet, /* 1: Use times which were set */
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NI_KnownSize, /* 1: Set if sizes are meaningful */
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} ntfs_inode_state_bits;
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#define test_nino_flag(ni, flag) test_bit(NI_##flag, (ni)->state)
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#define set_nino_flag(ni, flag) set_bit(NI_##flag, (ni)->state)
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#define clear_nino_flag(ni, flag) clear_bit(NI_##flag, (ni)->state)
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#define test_and_set_nino_flag(ni, flag) \
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test_and_set_bit(NI_##flag, (ni)->state)
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#define test_and_clear_nino_flag(ni, flag) \
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test_and_clear_bit(NI_##flag, (ni)->state)
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#define NInoDirty(ni) test_nino_flag(ni, Dirty)
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#define NInoSetDirty(ni) set_nino_flag(ni, Dirty)
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#define NInoClearDirty(ni) clear_nino_flag(ni, Dirty)
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#define NInoTestAndSetDirty(ni) test_and_set_nino_flag(ni, Dirty)
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#define NInoTestAndClearDirty(ni) test_and_clear_nino_flag(ni, Dirty)
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#define NInoAttrList(ni) test_nino_flag(ni, AttrList)
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#define NInoSetAttrList(ni) set_nino_flag(ni, AttrList)
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#define NInoClearAttrList(ni) clear_nino_flag(ni, AttrList)
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#define test_nino_al_flag(ni, flag) test_nino_flag(ni, AttrList##flag)
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#define set_nino_al_flag(ni, flag) set_nino_flag(ni, AttrList##flag)
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#define clear_nino_al_flag(ni, flag) clear_nino_flag(ni, AttrList##flag)
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#define test_and_set_nino_al_flag(ni, flag) \
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test_and_set_nino_flag(ni, AttrList##flag)
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#define test_and_clear_nino_al_flag(ni, flag) \
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test_and_clear_nino_flag(ni, AttrList##flag)
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#define NInoAttrListDirty(ni) test_nino_al_flag(ni, Dirty)
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#define NInoAttrListSetDirty(ni) set_nino_al_flag(ni, Dirty)
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#define NInoAttrListClearDirty(ni) clear_nino_al_flag(ni, Dirty)
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#define NInoAttrListTestAndSetDirty(ni) test_and_set_nino_al_flag(ni, Dirty)
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#define NInoAttrListTestAndClearDirty(ni) test_and_clear_nino_al_flag(ni, Dirty)
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#define NInoFileNameDirty(ni) test_nino_flag(ni, FileNameDirty)
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#define NInoFileNameSetDirty(ni) set_nino_flag(ni, FileNameDirty)
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#define NInoFileNameClearDirty(ni) clear_nino_flag(ni, FileNameDirty)
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#define NInoFileNameTestAndSetDirty(ni) \
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test_and_set_nino_flag(ni, FileNameDirty)
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#define NInoFileNameTestAndClearDirty(ni) \
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test_and_clear_nino_flag(ni, FileNameDirty)
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/**
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* struct _ntfs_inode - The NTFS in-memory inode structure.
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*
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* It is just used as an extension to the fields already provided in the VFS
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* inode.
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*/
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struct _ntfs_inode
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{
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u64 mft_no; /* Inode / mft record number. */
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MFT_RECORD *mrec; /* The actual mft record of the inode. */
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ntfs_volume *vol; /* Pointer to the ntfs volume of this inode. */
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unsigned long state; /* NTFS specific flags describing this inode.
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See ntfs_inode_state_bits above. */
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FILE_ATTR_FLAGS flags; /* Flags describing the file.
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(Copy from STANDARD_INFORMATION) */
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/*
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* Attribute list support (for use by the attribute lookup functions).
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* Setup during ntfs_open_inode() for all inodes with attribute lists.
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* Only valid if NI_AttrList is set in state.
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*/
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u32 attr_list_size; /* Length of attribute list value in bytes. */
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u8 *attr_list; /* Attribute list value itself. */
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/* Below fields are always valid. */
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s32 nr_extents; /* For a base mft record, the number of
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attached extent inodes (0 if none), for
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extent records this is -1. */
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union /* This union is only used if nr_extents != 0. */
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{
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ntfs_inode **extent_nis;/* For nr_extents > 0, array of the
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ntfs inodes of the extent mft
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records belonging to this base
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inode which have been loaded. */
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ntfs_inode *base_ni; /* For nr_extents == -1, the ntfs
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inode of the base mft record. */
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};
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/* Below fields are valid only for base inode. */
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/*
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* These two fields are used to sync filename index and guaranteed to be
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* correct, however value in index itself maybe wrong (windows itself
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* do not update them properly).
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* For directories, they hold the index size, provided the
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* flag KnownSize is set.
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*/
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s64 data_size; /* Data size of unnamed DATA attribute
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(or INDEX_ROOT for directories) */
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s64 allocated_size; /* Allocated size stored in the filename
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index. (NOTE: Equal to allocated size of
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the unnamed data attribute for normal or
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encrypted files and to compressed size
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of the unnamed data attribute for sparse or
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compressed files.) */
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/*
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* These four fields are copy of relevant fields from
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* STANDARD_INFORMATION attribute and used to sync it and FILE_NAME
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* attribute in the index.
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*/
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ntfs_time creation_time;
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ntfs_time last_data_change_time;
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ntfs_time last_mft_change_time;
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ntfs_time last_access_time;
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/* NTFS 3.x extensions added by JPA */
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/* only if NI_v3_Extensions is set in state */
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le32 owner_id;
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le32 security_id;
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le64 quota_charged;
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le64 usn;
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};
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typedef enum
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{
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NTFS_UPDATE_ATIME = 1 << 0,
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NTFS_UPDATE_MTIME = 1 << 1,
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NTFS_UPDATE_CTIME = 1 << 2,
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} ntfs_time_update_flags;
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#define NTFS_UPDATE_MCTIME (NTFS_UPDATE_MTIME | NTFS_UPDATE_CTIME)
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#define NTFS_UPDATE_AMCTIME (NTFS_UPDATE_ATIME | NTFS_UPDATE_MCTIME)
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extern ntfs_inode *ntfs_inode_base( ntfs_inode *ni );
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extern ntfs_inode *ntfs_inode_allocate( ntfs_volume *vol );
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extern ntfs_inode *ntfs_inode_open( ntfs_volume *vol, const MFT_REF mref );
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extern int ntfs_inode_close( ntfs_inode *ni );
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extern int ntfs_inode_close_in_dir( ntfs_inode *ni, ntfs_inode *dir_ni );
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#if CACHE_NIDATA_SIZE
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struct CACHED_GENERIC;
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extern int ntfs_inode_real_close( ntfs_inode *ni );
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extern void ntfs_inode_invalidate( ntfs_volume *vol, const MFT_REF mref );
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extern void ntfs_inode_nidata_free( const struct CACHED_GENERIC *cached );
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extern int ntfs_inode_nidata_hash( const struct CACHED_GENERIC *item );
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#endif
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extern ntfs_inode *ntfs_extent_inode_open( ntfs_inode *base_ni,
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const MFT_REF mref );
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extern int ntfs_inode_attach_all_extents( ntfs_inode *ni );
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extern void ntfs_inode_mark_dirty( ntfs_inode *ni );
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extern void ntfs_inode_update_times( ntfs_inode *ni, ntfs_time_update_flags mask );
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extern int ntfs_inode_sync( ntfs_inode *ni );
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extern int ntfs_inode_add_attrlist( ntfs_inode *ni );
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extern int ntfs_inode_free_space( ntfs_inode *ni, int size );
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extern int ntfs_inode_badclus_bad( u64 mft_no, ATTR_RECORD *a );
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extern int ntfs_inode_get_times( ntfs_inode *ni, char *value, size_t size );
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extern int ntfs_inode_set_times( ntfs_inode *ni, const char *value,
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size_t size, int flags );
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/* debugging */
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#define debug_double_inode(num, type)
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#define debug_cached_inode(ni)
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#endif /* defined _NTFS_INODE_H */
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