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TOMOYO Linux Cross Reference
Linux/fs/ntfs/ntfs.h

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  1 /*
  2  * ntfs.h - Defines for NTFS Linux kernel driver. Part of the Linux-NTFS
  3  *          project.
  4  *
  5  * Copyright (c) 2001-2005 Anton Altaparmakov
  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_H
 25 #define _LINUX_NTFS_H
 26 
 27 #include <linux/stddef.h>
 28 #include <linux/kernel.h>
 29 #include <linux/module.h>
 30 #include <linux/compiler.h>
 31 #include <linux/fs.h>
 32 #include <linux/nls.h>
 33 #include <linux/smp.h>
 34 #include <linux/pagemap.h>
 35 
 36 #include "types.h"
 37 #include "volume.h"
 38 #include "layout.h"
 39 
 40 typedef enum {
 41         NTFS_BLOCK_SIZE         = 512,
 42         NTFS_BLOCK_SIZE_BITS    = 9,
 43         NTFS_SB_MAGIC           = 0x5346544e,   /* 'NTFS' */
 44         NTFS_MAX_NAME_LEN       = 255,
 45         NTFS_MAX_ATTR_NAME_LEN  = 255,
 46         NTFS_MAX_CLUSTER_SIZE   = 64 * 1024,    /* 64kiB */
 47         NTFS_MAX_PAGES_PER_CLUSTER = NTFS_MAX_CLUSTER_SIZE / PAGE_CACHE_SIZE,
 48 } NTFS_CONSTANTS;
 49 
 50 /* Global variables. */
 51 
 52 /* Slab caches (from super.c). */
 53 extern struct kmem_cache *ntfs_name_cache;
 54 extern struct kmem_cache *ntfs_inode_cache;
 55 extern struct kmem_cache *ntfs_big_inode_cache;
 56 extern struct kmem_cache *ntfs_attr_ctx_cache;
 57 extern struct kmem_cache *ntfs_index_ctx_cache;
 58 
 59 /* The various operations structs defined throughout the driver files. */
 60 extern const struct address_space_operations ntfs_aops;
 61 extern const struct address_space_operations ntfs_mst_aops;
 62 
 63 extern const struct  file_operations ntfs_file_ops;
 64 extern const struct inode_operations ntfs_file_inode_ops;
 65 
 66 extern const struct  file_operations ntfs_dir_ops;
 67 extern const struct inode_operations ntfs_dir_inode_ops;
 68 
 69 extern const struct  file_operations ntfs_empty_file_ops;
 70 extern const struct inode_operations ntfs_empty_inode_ops;
 71 
 72 extern const struct export_operations ntfs_export_ops;
 73 
 74 /**
 75  * NTFS_SB - return the ntfs volume given a vfs super block
 76  * @sb:         VFS super block
 77  *
 78  * NTFS_SB() returns the ntfs volume associated with the VFS super block @sb.
 79  */
 80 static inline ntfs_volume *NTFS_SB(struct super_block *sb)
 81 {
 82         return sb->s_fs_info;
 83 }
 84 
 85 /* Declarations of functions and global variables. */
 86 
 87 /* From fs/ntfs/compress.c */
 88 extern int ntfs_read_compressed_block(struct page *page);
 89 extern int allocate_compression_buffers(void);
 90 extern void free_compression_buffers(void);
 91 
 92 /* From fs/ntfs/super.c */
 93 #define default_upcase_len 0x10000
 94 extern struct mutex ntfs_lock;
 95 
 96 typedef struct {
 97         int val;
 98         char *str;
 99 } option_t;
100 extern const option_t on_errors_arr[];
101 
102 /* From fs/ntfs/mst.c */
103 extern int post_read_mst_fixup(NTFS_RECORD *b, const u32 size);
104 extern int pre_write_mst_fixup(NTFS_RECORD *b, const u32 size);
105 extern void post_write_mst_fixup(NTFS_RECORD *b);
106 
107 /* From fs/ntfs/unistr.c */
108 extern bool ntfs_are_names_equal(const ntfschar *s1, size_t s1_len,
109                 const ntfschar *s2, size_t s2_len,
110                 const IGNORE_CASE_BOOL ic,
111                 const ntfschar *upcase, const u32 upcase_size);
112 extern int ntfs_collate_names(const ntfschar *name1, const u32 name1_len,
113                 const ntfschar *name2, const u32 name2_len,
114                 const int err_val, const IGNORE_CASE_BOOL ic,
115                 const ntfschar *upcase, const u32 upcase_len);
116 extern int ntfs_ucsncmp(const ntfschar *s1, const ntfschar *s2, size_t n);
117 extern int ntfs_ucsncasecmp(const ntfschar *s1, const ntfschar *s2, size_t n,
118                 const ntfschar *upcase, const u32 upcase_size);
119 extern void ntfs_upcase_name(ntfschar *name, u32 name_len,
120                 const ntfschar *upcase, const u32 upcase_len);
121 extern void ntfs_file_upcase_value(FILE_NAME_ATTR *file_name_attr,
122                 const ntfschar *upcase, const u32 upcase_len);
123 extern int ntfs_file_compare_values(FILE_NAME_ATTR *file_name_attr1,
124                 FILE_NAME_ATTR *file_name_attr2,
125                 const int err_val, const IGNORE_CASE_BOOL ic,
126                 const ntfschar *upcase, const u32 upcase_len);
127 extern int ntfs_nlstoucs(const ntfs_volume *vol, const char *ins,
128                 const int ins_len, ntfschar **outs);
129 extern int ntfs_ucstonls(const ntfs_volume *vol, const ntfschar *ins,
130                 const int ins_len, unsigned char **outs, int outs_len);
131 
132 /* From fs/ntfs/upcase.c */
133 extern ntfschar *generate_default_upcase(void);
134 
135 static inline int ntfs_ffs(int x)
136 {
137         int r = 1;
138 
139         if (!x)
140                 return 0;
141         if (!(x & 0xffff)) {
142                 x >>= 16;
143                 r += 16;
144         }
145         if (!(x & 0xff)) {
146                 x >>= 8;
147                 r += 8;
148         }
149         if (!(x & 0xf)) {
150                 x >>= 4;
151                 r += 4;
152         }
153         if (!(x & 3)) {
154                 x >>= 2;
155                 r += 2;
156         }
157         if (!(x & 1)) {
158                 x >>= 1;
159                 r += 1;
160         }
161         return r;
162 }
163 
164 #endif /* _LINUX_NTFS_H */
165 

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