Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 321 insertions, 0 deletions

diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h
new file mode 100644
index 000000000000..99580455f2ed
--- /dev/null
+++ b/fs/ntfs/inode.h
@@ -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 */