[linux.git] / fs / ntfs / inode.h

/*
 * inode.h - Defines for inode structures NTFS Linux kernel driver. Part of
 *	     the Linux-NTFS project.
 *
 * Copyright (c) 2001-2005 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_INODE_H
#define _LINUX_NTFS_INODE_H

#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/seq_file.h>
#include <linux/list.h>
#include <asm/atomic.h>
#include <asm/semaphore.h>

#include "layout.h"
#include "volume.h"
#include "types.h"
#include "runlist.h"
#include "debug.h"

typedef struct _ntfs_inode ntfs_inode;

/*
 * The NTFS in-memory inode structure. It is just used as an extension to the
 * fields already provided in the VFS inode.
 */
struct _ntfs_inode {
	rwlock_t size_lock;	/* Lock serializing access to inode sizes. */
	s64 initialized_size;	/* Copy from the attribute record. */
	s64 allocated_size;	/* Copy from the attribute record. */
	unsigned long state;	/* NTFS specific flags describing this inode.
				   See ntfs_inode_state_bits below. */
	unsigned long mft_no;	/* Number of the mft record / inode. */
	u16 seq_no;		/* Sequence number of the mft record. */
	atomic_t count;		/* Inode reference count for book keeping. */
	ntfs_volume *vol;	/* Pointer to the ntfs volume of this inode. */
	/*
	 * If NInoAttr() is true, the below fields describe the attribute which
	 * this fake inode belongs to. The actual inode of this attribute is
	 * pointed to by base_ntfs_ino and nr_extents is always set to -1 (see
	 * below). For real inodes, we also set the type (AT_DATA for files and
	 * AT_INDEX_ALLOCATION for directories), with the name = NULL and
	 * name_len = 0 for files and name = I30 (global constant) and
	 * name_len = 4 for directories.
	 */
	ATTR_TYPE type;	/* Attribute type of this fake inode. */
	ntfschar *name;		/* Attribute name of this fake inode. */
	u32 name_len;		/* Attribute name length of this fake inode. */
	runlist runlist;	/* If state has the NI_NonResident bit set,
				   the runlist of the unnamed data attribute
				   (if a file) or of the index allocation
				   attribute (directory) or of the attribute
				   described by the fake inode (if NInoAttr()).
				   If runlist.rl is NULL, the runlist has not
				   been read in yet or has been unmapped. If
				   NI_NonResident is clear, the attribute is
				   resident (file and fake inode) or there is
				   no $I30 index allocation attribute
				   (small directory). In the latter case
				   runlist.rl is always NULL.*/
	/*
	 * The following fields are only valid for real inodes and extent
	 * inodes.
	 */
	struct semaphore mrec_lock; /* Lock for serializing access to the
				   mft record belonging to this inode. */
	struct page *page;	/* The page containing the mft record of the
				   inode. This should only be touched by the
				   (un)map_mft_record*() functions. */
	int page_ofs;		/* Offset into the page at which the mft record
				   begins. This should only be touched by the
				   (un)map_mft_record*() functions. */
	/*
	 * Attribute list support (only for use by the attribute lookup
	 * functions). Setup during read_inode for all inodes with attribute
	 * lists. Only valid if NI_AttrList is set in state, and attr_list_rl is
	 * further only valid if NI_AttrListNonResident is set.
	 */
	u32 attr_list_size;	/* Length of attribute list value in bytes. */
	u8 *attr_list;		/* Attribute list value itself. */
	runlist attr_list_rl;	/* Run list for the attribute list value. */
	union {
		struct { /* It is a directory, $MFT, or an index inode. */
			struct inode *bmp_ino;	/* Attribute inode for the
						   index $BITMAP. */
			u32 block_size;		/* Size of an index block. */
			u32 vcn_size;		/* Size of a vcn in this
						   index. */
			COLLATION_RULE collation_rule; /* The collation rule
						   for the index. */
			u8 block_size_bits; 	/* Log2 of the above. */
			u8 vcn_size_bits;	/* Log2 of the above. */
		} index;
		struct { /* It is a compressed/sparse file/attribute inode. */
			s64 size;		/* Copy of compressed_size from
						   $DATA. */
			u32 block_size;		/* Size of a compression block
						   (cb). */
			u8 block_size_bits;	/* Log2 of the size of a cb. */
			u8 block_clusters;	/* Number of clusters per cb. */
		} compressed;
	} itype;
	struct semaphore extent_lock;	/* Lock for accessing/modifying the
					   below . */
	s32 nr_extents;	/* For a base mft record, the number of attached extent
			   inodes (0 if none), for extent records and for fake
			   inodes describing an attribute this is -1. */
	union {		/* This union is only used if nr_extents != 0. */
		ntfs_inode **extent_ntfs_inos;	/* For nr_extents > 0, array of
						   the ntfs inodes of the extent
						   mft records belonging to
						   this base inode which have
						   been loaded. */
		ntfs_inode *base_ntfs_ino;	/* For nr_extents == -1, the
						   ntfs inode of the base mft
						   record. For fake inodes, the
						   real (base) inode to which
						   the attribute belongs. */
	} ext;
};

/*
 * Defined bits for the state field in the ntfs_inode structure.
 * (f) = files only, (d) = directories only, (a) = attributes/fake inodes only
 */
typedef enum {
	NI_Dirty,		/* 1: Mft record needs to be written to disk. */
	NI_AttrList,		/* 1: Mft record contains an attribute list. */
	NI_AttrListNonResident,	/* 1: Attribute list is non-resident. Implies
				      NI_AttrList is set. */

	NI_Attr,		/* 1: Fake inode for attribute i/o.
				   0: Real inode or extent inode. */

	NI_MstProtected,	/* 1: Attribute is protected by MST fixups.
				   0: Attribute is not protected by fixups. */
	NI_NonResident,		/* 1: Unnamed data attr is non-resident (f).
				   1: Attribute is non-resident (a). */
	NI_IndexAllocPresent = NI_NonResident,	/* 1: $I30 index alloc attr is
						   present (d). */
	NI_Compressed,		/* 1: Unnamed data attr is compressed (f).
				   1: Create compressed files by default (d).
				   1: Attribute is compressed (a). */
	NI_Encrypted,		/* 1: Unnamed data attr is encrypted (f).
				   1: Create encrypted files by default (d).
				   1: Attribute is encrypted (a). */
	NI_Sparse,		/* 1: Unnamed data attr is sparse (f).
				   1: Create sparse files by default (d).
				   1: Attribute is sparse (a). */
	NI_SparseDisabled,	/* 1: May not create sparse regions. */
	NI_TruncateFailed,	/* 1: Last ntfs_truncate() call failed. */
} ntfs_inode_state_bits;

/*
 * NOTE: We should be adding dirty mft records to a list somewhere and they
 * should be independent of the (ntfs/vfs) inode structure so that an inode can
 * be removed but the record can be left dirty for syncing later.
 */

/*
 * Macro tricks to expand the NInoFoo(), NInoSetFoo(), and NInoClearFoo()
 * functions.
 */
#define NINO_FNS(flag)					\
static inline int NIno##flag(ntfs_inode *ni)		\
{							\
	return test_bit(NI_##flag, &(ni)->state);	\
}							\
static inline void NInoSet##flag(ntfs_inode *ni)	\
{							\
	set_bit(NI_##flag, &(ni)->state);		\
}							\
static inline void NInoClear##flag(ntfs_inode *ni)	\
{							\
	clear_bit(NI_##flag, &(ni)->state);		\
}

/*
 * As above for NInoTestSetFoo() and NInoTestClearFoo().
 */
#define TAS_NINO_FNS(flag)					\
static inline int NInoTestSet##flag(ntfs_inode *ni)		\
{								\
	return test_and_set_bit(NI_##flag, &(ni)->state);	\
}								\
static inline int NInoTestClear##flag(ntfs_inode *ni)		\
{								\
	return test_and_clear_bit(NI_##flag, &(ni)->state);	\
}

/* Emit the ntfs inode bitops functions. */
NINO_FNS(Dirty)
TAS_NINO_FNS(Dirty)
NINO_FNS(AttrList)
NINO_FNS(AttrListNonResident)
NINO_FNS(Attr)
NINO_FNS(MstProtected)
NINO_FNS(NonResident)
NINO_FNS(IndexAllocPresent)
NINO_FNS(Compressed)
NINO_FNS(Encrypted)
NINO_FNS(Sparse)
NINO_FNS(SparseDisabled)
NINO_FNS(TruncateFailed)

/*
 * The full structure containing a ntfs_inode and a vfs struct inode. Used for
 * all real and fake inodes but not for extent inodes which lack the vfs struct
 * inode.
 */
typedef struct {
	ntfs_inode ntfs_inode;
	struct inode vfs_inode;		/* The vfs inode structure. */
} big_ntfs_inode;

/**
 * NTFS_I - return the ntfs inode given a vfs inode
 * @inode:	VFS inode
 *
 * NTFS_I() returns the ntfs inode associated with the VFS @inode.
 */
static inline ntfs_inode *NTFS_I(struct inode *inode)
{
	return (ntfs_inode *)list_entry(inode, big_ntfs_inode, vfs_inode);
}

static inline struct inode *VFS_I(ntfs_inode *ni)
{
	return &((big_ntfs_inode *)ni)->vfs_inode;
}

/**
 * ntfs_attr - ntfs in memory attribute structure
 * @mft_no:	mft record number of the base mft record of this attribute
 * @name:	Unicode name of the attribute (NULL if unnamed)
 * @name_len:	length of @name in Unicode characters (0 if unnamed)
 * @type:	attribute type (see layout.h)
 *
 * This structure exists only to provide a small structure for the
 * ntfs_{attr_}iget()/ntfs_test_inode()/ntfs_init_locked_inode() mechanism.
 *
 * NOTE: Elements are ordered by size to make the structure as compact as
 * possible on all architectures.
 */
typedef struct {
	unsigned long mft_no;
	ntfschar *name;
	u32 name_len;
	ATTR_TYPE type;
} ntfs_attr;

typedef int (*test_t)(struct inode *, void *);

extern int ntfs_test_inode(struct inode *vi, ntfs_attr *na);

extern struct inode *ntfs_iget(struct super_block *sb, unsigned long mft_no);
extern struct inode *ntfs_attr_iget(struct inode *base_vi, ATTR_TYPE type,
		ntfschar *name, u32 name_len);
extern struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
		u32 name_len);

extern struct inode *ntfs_alloc_big_inode(struct super_block *sb);
extern void ntfs_destroy_big_inode(struct inode *inode);
extern void ntfs_clear_big_inode(struct inode *vi);

extern void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni);

static inline void ntfs_init_big_inode(struct inode *vi)
{
	ntfs_inode *ni = NTFS_I(vi);

	ntfs_debug("Entering.");
	__ntfs_init_inode(vi->i_sb, ni);
	ni->mft_no = vi->i_ino;
}

extern ntfs_inode *ntfs_new_extent_inode(struct super_block *sb,
		unsigned long mft_no);
extern void ntfs_clear_extent_inode(ntfs_inode *ni);

extern int ntfs_read_inode_mount(struct inode *vi);

extern void ntfs_put_inode(struct inode *vi);

extern int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt);

#ifdef NTFS_RW

extern int ntfs_truncate(struct inode *vi);
extern void ntfs_truncate_vfs(struct inode *vi);

extern int ntfs_setattr(struct dentry *dentry, struct iattr *attr);

extern int ntfs_write_inode(struct inode *vi, int sync);

static inline void ntfs_commit_inode(struct inode *vi)
{
	if (!is_bad_inode(vi))
		ntfs_write_inode(vi, 1);
	return;
}

#endif /* NTFS_RW */

#endif /* _LINUX_NTFS_INODE_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* inode.h - Defines for inode structures NTFS Linux kernel driver. Part of
	3	* the Linux-NTFS project.
	4	*
c002f425	5	* Copyright (c) 2001-2005 Anton Altaparmakov
1da177e4 LT	6	* Copyright (c) 2002 Richard Russon
	7	*
	8	* This program/include file is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as published
	10	* by the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program/include file is distributed in the hope that it will be
	14	* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
	15	* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program (in the main directory of the Linux-NTFS
	20	* distribution in the file COPYING); if not, write to the Free Software
	21	* Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	22	*/
	23
	24	#ifndef _LINUX_NTFS_INODE_H
	25	#define _LINUX_NTFS_INODE_H
	26
	27	#include <linux/mm.h>
	28	#include <linux/fs.h>
	29	#include <linux/seq_file.h>
	30	#include <linux/list.h>
	31	#include <asm/atomic.h>
	32	#include <asm/semaphore.h>
	33
	34	#include "layout.h"
	35	#include "volume.h"
	36	#include "types.h"
	37	#include "runlist.h"
	38	#include "debug.h"
	39
	40	typedef struct _ntfs_inode ntfs_inode;
	41
	42	/*
	43	* The NTFS in-memory inode structure. It is just used as an extension to the
	44	* fields already provided in the VFS inode.
	45	*/
	46	struct _ntfs_inode {
36763677	47	rwlock_t size_lock; /* Lock serializing access to inode sizes. */
1da177e4 LT	48	s64 initialized_size; /* Copy from the attribute record. */
	49	s64 allocated_size; /* Copy from the attribute record. */
	50	unsigned long state; /* NTFS specific flags describing this inode.
	51	See ntfs_inode_state_bits below. */
	52	unsigned long mft_no; /* Number of the mft record / inode. */
	53	u16 seq_no; /* Sequence number of the mft record. */
	54	atomic_t count; /* Inode reference count for book keeping. */
	55	ntfs_volume vol; / Pointer to the ntfs volume of this inode. */
	56	/*
	57	* If NInoAttr() is true, the below fields describe the attribute which
	58	* this fake inode belongs to. The actual inode of this attribute is
	59	* pointed to by base_ntfs_ino and nr_extents is always set to -1 (see
	60	* below). For real inodes, we also set the type (AT_DATA for files and
	61	* AT_INDEX_ALLOCATION for directories), with the name = NULL and
	62	* name_len = 0 for files and name = I30 (global constant) and
	63	* name_len = 4 for directories.
	64	*/
	65	ATTR_TYPE type; /* Attribute type of this fake inode. */
	66	ntfschar name; / Attribute name of this fake inode. */
	67	u32 name_len; /* Attribute name length of this fake inode. */
	68	runlist runlist; /* If state has the NI_NonResident bit set,
	69	the runlist of the unnamed data attribute
	70	(if a file) or of the index allocation
	71	attribute (directory) or of the attribute
	72	described by the fake inode (if NInoAttr()).
	73	If runlist.rl is NULL, the runlist has not
	74	been read in yet or has been unmapped. If
	75	NI_NonResident is clear, the attribute is
	76	resident (file and fake inode) or there is
	77	no $I30 index allocation attribute
	78	(small directory). In the latter case
	79	runlist.rl is always NULL.*/
	80	/*
	81	* The following fields are only valid for real inodes and extent
	82	* inodes.
	83	*/
	84	struct semaphore mrec_lock; /* Lock for serializing access to the
	85	mft record belonging to this inode. */
	86	struct page page; / The page containing the mft record of the
	87	inode. This should only be touched by the
	88	(un)map_mft_record() functions. /
	89	int page_ofs; /* Offset into the page at which the mft record
	90	begins. This should only be touched by the
	91	(un)map_mft_record() functions. /
	92	/*
	93	* Attribute list support (only for use by the attribute lookup
	94	* functions). Setup during read_inode for all inodes with attribute
	95	* lists. Only valid if NI_AttrList is set in state, and attr_list_rl is
	96	* further only valid if NI_AttrListNonResident is set.
	97	*/
	98	u32 attr_list_size; /* Length of attribute list value in bytes. */
	99	u8 attr_list; / Attribute list value itself. */
	100	runlist attr_list_rl; /* Run list for the attribute list value. */
	101	union {
	102	struct { /* It is a directory, $MFT, or an index inode. */
	103	struct inode bmp_ino; / Attribute inode for the
	104	index $BITMAP. */
	105	u32 block_size; /* Size of an index block. */
	106	u32 vcn_size; /* Size of a vcn in this
	107	index. */
	108	COLLATION_RULE collation_rule; /* The collation rule
	109	for the index. */
	110	u8 block_size_bits; /* Log2 of the above. */
	111	u8 vcn_size_bits; /* Log2 of the above. */
112	} index;
3bd1f4a1	113	struct { /* It is a compressed/sparse file/attribute inode. */
1da177e4 LT	114	s64 size; /* Copy of compressed_size from
	115	$DATA. */
	116	u32 block_size; /* Size of a compression block
	117	(cb). */
	118	u8 block_size_bits; /* Log2 of the size of a cb. */
	119	u8 block_clusters; /* Number of clusters per cb. */
	120	} compressed;
	121	} itype;
	122	struct semaphore extent_lock; /* Lock for accessing/modifying the
	123	below . */
	124	s32 nr_extents; /* For a base mft record, the number of attached extent
	125	inodes (0 if none), for extent records and for fake
	126	inodes describing an attribute this is -1. */
	127	union { /* This union is only used if nr_extents != 0. */
	128	ntfs_inode *extent_ntfs_inos; / For nr_extents > 0, array of
	129	the ntfs inodes of the extent
	130	mft records belonging to
	131	this base inode which have
	132	been loaded. */
	133	ntfs_inode base_ntfs_ino; / For nr_extents == -1, the
	134	ntfs inode of the base mft
	135	record. For fake inodes, the
	136	real (base) inode to which
	137	the attribute belongs. */
	138	} ext;
	139	};
	140
	141	/*
	142	* Defined bits for the state field in the ntfs_inode structure.
	143	* (f) = files only, (d) = directories only, (a) = attributes/fake inodes only
	144	*/
	145	typedef enum {
	146	NI_Dirty, /* 1: Mft record needs to be written to disk. */
	147	NI_AttrList, /* 1: Mft record contains an attribute list. */
	148	NI_AttrListNonResident, /* 1: Attribute list is non-resident. Implies
	149	NI_AttrList is set. */
	150
	151	NI_Attr, /* 1: Fake inode for attribute i/o.
	152	0: Real inode or extent inode. */
	153
	154	NI_MstProtected, /* 1: Attribute is protected by MST fixups.
	155	0: Attribute is not protected by fixups. */
	156	NI_NonResident, /* 1: Unnamed data attr is non-resident (f).
	157	1: Attribute is non-resident (a). */
	158	NI_IndexAllocPresent = NI_NonResident, /* 1: $I30 index alloc attr is
	159	present (d). */
	160	NI_Compressed, /* 1: Unnamed data attr is compressed (f).
	161	1: Create compressed files by default (d).
	162	1: Attribute is compressed (a). */
	163	NI_Encrypted, /* 1: Unnamed data attr is encrypted (f).
	164	1: Create encrypted files by default (d).
	165	1: Attribute is encrypted (a). */
	166	NI_Sparse, /* 1: Unnamed data attr is sparse (f).
	167	1: Create sparse files by default (d).
	168	1: Attribute is sparse (a). */
c002f425	169	NI_SparseDisabled, /* 1: May not create sparse regions. */
1da177e4 LT	170	NI_TruncateFailed, /* 1: Last ntfs_truncate() call failed. */
	171	} ntfs_inode_state_bits;
	172
	173	/*
	174	* NOTE: We should be adding dirty mft records to a list somewhere and they
	175	* should be independent of the (ntfs/vfs) inode structure so that an inode can
	176	* be removed but the record can be left dirty for syncing later.
	177	*/
	178
	179	/*
	180	* Macro tricks to expand the NInoFoo(), NInoSetFoo(), and NInoClearFoo()
	181	* functions.
	182	*/
	183	#define NINO_FNS(flag) \
	184	static inline int NIno##flag(ntfs_inode *ni) \
	185	{ \
	186	return test_bit(NI_##flag, &(ni)->state); \
	187	} \
	188	static inline void NInoSet##flag(ntfs_inode *ni) \
	189	{ \
	190	set_bit(NI_##flag, &(ni)->state); \
	191	} \
	192	static inline void NInoClear##flag(ntfs_inode *ni) \
	193	{ \
	194	clear_bit(NI_##flag, &(ni)->state); \
	195	}
	196
	197	/*
	198	* As above for NInoTestSetFoo() and NInoTestClearFoo().
	199	*/
	200	#define TAS_NINO_FNS(flag) \
	201	static inline int NInoTestSet##flag(ntfs_inode *ni) \
	202	{ \
	203	return test_and_set_bit(NI_##flag, &(ni)->state); \
	204	} \
	205	static inline int NInoTestClear##flag(ntfs_inode *ni) \
	206	{ \
	207	return test_and_clear_bit(NI_##flag, &(ni)->state); \
	208	}
	209
	210	/* Emit the ntfs inode bitops functions. */
	211	NINO_FNS(Dirty)
	212	TAS_NINO_FNS(Dirty)
	213	NINO_FNS(AttrList)
	214	NINO_FNS(AttrListNonResident)
	215	NINO_FNS(Attr)
	216	NINO_FNS(MstProtected)
	217	NINO_FNS(NonResident)
	218	NINO_FNS(IndexAllocPresent)
	219	NINO_FNS(Compressed)
	220	NINO_FNS(Encrypted)
	221	NINO_FNS(Sparse)
c002f425	222	NINO_FNS(SparseDisabled)
1da177e4 LT	223	NINO_FNS(TruncateFailed)
	224
	225	/*
	226	* The full structure containing a ntfs_inode and a vfs struct inode. Used for
	227	* all real and fake inodes but not for extent inodes which lack the vfs struct
	228	* inode.
	229	*/
	230	typedef struct {
	231	ntfs_inode ntfs_inode;
	232	struct inode vfs_inode; /* The vfs inode structure. */
	233	} big_ntfs_inode;
	234
	235	/**
	236	* NTFS_I - return the ntfs inode given a vfs inode
	237	* @inode: VFS inode
	238	*
	239	* NTFS_I() returns the ntfs inode associated with the VFS @inode.
	240	*/
	241	static inline ntfs_inode NTFS_I(struct inode inode)
	242	{
	243	return (ntfs_inode *)list_entry(inode, big_ntfs_inode, vfs_inode);
	244	}
	245
	246	static inline struct inode VFS_I(ntfs_inode ni)
	247	{
	248	return &((big_ntfs_inode *)ni)->vfs_inode;
	249	}
	250
	251	/**
	252	* ntfs_attr - ntfs in memory attribute structure
	253	* @mft_no: mft record number of the base mft record of this attribute
	254	* @name: Unicode name of the attribute (NULL if unnamed)
	255	* @name_len: length of @name in Unicode characters (0 if unnamed)
	256	* @type: attribute type (see layout.h)
	257	*
	258	* This structure exists only to provide a small structure for the
	259	* ntfs_{attr_}iget()/ntfs_test_inode()/ntfs_init_locked_inode() mechanism.
	260	*
	261	* NOTE: Elements are ordered by size to make the structure as compact as
	262	* possible on all architectures.
	263	*/
	264	typedef struct {
	265	unsigned long mft_no;
	266	ntfschar *name;
	267	u32 name_len;
	268	ATTR_TYPE type;
	269	} ntfs_attr;
	270
	271	typedef int (test_t)(struct inode , void *);
	272
	273	extern int ntfs_test_inode(struct inode vi, ntfs_attr na);
	274
	275	extern struct inode ntfs_iget(struct super_block sb, unsigned long mft_no);
	276	extern struct inode ntfs_attr_iget(struct inode base_vi, ATTR_TYPE type,
	277	ntfschar *name, u32 name_len);
	278	extern struct inode ntfs_index_iget(struct inode base_vi, ntfschar *name,
	279	u32 name_len);
	280
	281	extern struct inode ntfs_alloc_big_inode(struct super_block sb);
	282	extern void ntfs_destroy_big_inode(struct inode *inode);
	283	extern void ntfs_clear_big_inode(struct inode *vi);
	284
	285	extern void __ntfs_init_inode(struct super_block sb, ntfs_inode ni);
	286
287	static inline void ntfs_init_big_inode(struct inode *vi)
288	{
289	ntfs_inode *ni = NTFS_I(vi);
290
291	ntfs_debug("Entering.");
292	__ntfs_init_inode(vi->i_sb, ni);
293	ni->mft_no = vi->i_ino;
294	}
295
296	extern ntfs_inode ntfs_new_extent_inode(struct super_block sb,
297	unsigned long mft_no);
298	extern void ntfs_clear_extent_inode(ntfs_inode *ni);
299
300	extern int ntfs_read_inode_mount(struct inode *vi);
301
302	extern void ntfs_put_inode(struct inode *vi);
303
304	extern int ntfs_show_options(struct seq_file sf, struct vfsmount mnt);
305
306	#ifdef NTFS_RW
307
308	extern int ntfs_truncate(struct inode *vi);
309	extern void ntfs_truncate_vfs(struct inode *vi);
310
311	extern int ntfs_setattr(struct dentry dentry, struct iattr attr);
312
313	extern int ntfs_write_inode(struct inode *vi, int sync);
314
315	static inline void ntfs_commit_inode(struct inode *vi)
316	{
317	if (!is_bad_inode(vi))
318	ntfs_write_inode(vi, 1);
319	return;
320	}
321
322	#endif /* NTFS_RW */
323
324	#endif /* _LINUX_NTFS_INODE_H */