Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
321
fs/ntfs/inode.h
Normal file
321
fs/ntfs/inode.h
Normal file
@@ -0,0 +1,321 @@
|
||||
/*
|
||||
* inode.h - Defines for inode structures NTFS Linux kernel driver. Part of
|
||||
* the Linux-NTFS project.
|
||||
*
|
||||
* Copyright (c) 2001-2004 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 {
|
||||
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 file or an 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_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(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 */
|
||||
Reference in New Issue
Block a user