The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/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 */

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