--- /dev/null
+/*
+ * inode.h - Defines for inode structures NTFS Linux kernel driver. Part of
+ * the Linux-NTFS project.
+ *
+ * Copyright (c) 2001-2007 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/atomic.h>
+
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/mm.h>
+#include <linux/mutex.h>
+#include <linux/seq_file.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 mutex 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. */
+ 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 mutex 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_evict_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 int ntfs_show_options(struct seq_file *sf, struct dentry *root);
+
+#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;
+}
+
+#else
+
+static inline void ntfs_truncate_vfs(struct inode *vi) {}
+
+#endif /* NTFS_RW */
+
+#endif /* _LINUX_NTFS_INODE_H */
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