165 lines
6.2 KiB
C
165 lines
6.2 KiB
C
/*
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* inode.h - Defines for NTFS inode handling. Part of the Linux-NTFS project.
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*
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* Copyright (c) 2001,2002 Anton Altaparmakov
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* Copyright (c) 2004 Yura Pakhuchiy
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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 Linux-NTFS
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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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/*
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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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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_Compressed, /* 1: Inode is compressed. */
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NI_Encrypted, /* 1: Inode is encrypted. */
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NI_Sparse, /* 1: Inode is sparse. */
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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 NInoCompressed(ni) test_nino_flag(ni, Compressed)
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#define NInoSetCompressed(ni) set_nino_flag(ni, Compressed)
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#define NInoClearCompressed(ni) clear_nino_flag(ni, Compressed)
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#define NInoEncrypted(ni) test_nino_flag(ni, Encrypted)
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#define NInoSetEncrypted(ni) set_nino_flag(ni, Encrypted)
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#define NInoClearEncrypted(ni) clear_nino_flag(ni, Encrypted)
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#define NInoSparse(ni) test_nino_flag(ni, Sparse)
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#define NInoSetSparse(ni) set_nino_flag(ni, Sparse)
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#define NInoClearSparse(ni) clear_nino_flag(ni, Sparse)
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/*
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* The NTFS in-memory inode structure. It is just used as an extension to the
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* fields already provided in the VFS inode.
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*/
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struct _ntfs_inode {
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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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/*
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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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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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void *private_data; /* Temp: for directory handling */
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int ref_count;
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};
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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 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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/**
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* ntfs_inode_mark_dirty - set the inode (and its base inode if it exists) dirty
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* @ni: ntfs inode to set dirty
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*
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* Set the inode @ni dirty so it is written out later (at the latest at
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* ntfs_inode_close() time). If @ni is an extent inode, set the base inode
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* dirty, too.
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*
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* This function cannot fail.
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*/
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static __inline__ void ntfs_inode_mark_dirty(ntfs_inode *ni) {
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NInoSetDirty(ni);
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if (ni->nr_extents == -1)
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NInoSetDirty(ni->base_ni);
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}
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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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#endif /* defined _NTFS_INODE_H */
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