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/attrib.h

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    1 /*
    2  * attrib.h - Defines for attribute handling in NTFS Linux kernel driver.
    3  *            Part of the Linux-NTFS 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_ATTRIB_H
   25 #define _LINUX_NTFS_ATTRIB_H
   26 
   27 #include "endian.h"
   28 #include "types.h"
   29 #include "layout.h"
   30 #include "inode.h"
   31 #include "runlist.h"
   32 #include "volume.h"
   33 
   34 /**
   35  * ntfs_attr_search_ctx - used in attribute search functions
   36  * @mrec:       buffer containing mft record to search
   37  * @attr:       attribute record in @mrec where to begin/continue search
   38  * @is_first:   if true ntfs_attr_lookup() begins search with @attr, else after
   39  *
   40  * Structure must be initialized to zero before the first call to one of the
   41  * attribute search functions. Initialize @mrec to point to the mft record to
   42  * search, and @attr to point to the first attribute within @mrec (not necessary
   43  * if calling the _first() functions), and set @is_first to 'true' (not necessary
   44  * if calling the _first() functions).
   45  *
   46  * If @is_first is 'true', the search begins with @attr. If @is_first is 'false',
   47  * the search begins after @attr. This is so that, after the first call to one
   48  * of the search attribute functions, we can call the function again, without
   49  * any modification of the search context, to automagically get the next
   50  * matching attribute.
   51  */
   52 typedef struct {
   53         MFT_RECORD *mrec;
   54         ATTR_RECORD *attr;
   55         bool is_first;
   56         ntfs_inode *ntfs_ino;
   57         ATTR_LIST_ENTRY *al_entry;
   58         ntfs_inode *base_ntfs_ino;
   59         MFT_RECORD *base_mrec;
   60         ATTR_RECORD *base_attr;
   61 } ntfs_attr_search_ctx;
   62 
   63 extern int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn,
   64                 ntfs_attr_search_ctx *ctx);
   65 extern int ntfs_map_runlist(ntfs_inode *ni, VCN vcn);
   66 
   67 extern LCN ntfs_attr_vcn_to_lcn_nolock(ntfs_inode *ni, const VCN vcn,
   68                 const bool write_locked);
   69 
   70 extern runlist_element *ntfs_attr_find_vcn_nolock(ntfs_inode *ni,
   71                 const VCN vcn, ntfs_attr_search_ctx *ctx);
   72 
   73 int ntfs_attr_lookup(const ATTR_TYPE type, const ntfschar *name,
   74                 const u32 name_len, const IGNORE_CASE_BOOL ic,
   75                 const VCN lowest_vcn, const u8 *val, const u32 val_len,
   76                 ntfs_attr_search_ctx *ctx);
   77 
   78 extern int load_attribute_list(ntfs_volume *vol, runlist *rl, u8 *al_start,
   79                 const s64 size, const s64 initialized_size);
   80 
   81 static inline s64 ntfs_attr_size(const ATTR_RECORD *a)
   82 {
   83         if (!a->non_resident)
   84                 return (s64)le32_to_cpu(a->data.resident.value_length);
   85         return sle64_to_cpu(a->data.non_resident.data_size);
   86 }
   87 
   88 extern void ntfs_attr_reinit_search_ctx(ntfs_attr_search_ctx *ctx);
   89 extern ntfs_attr_search_ctx *ntfs_attr_get_search_ctx(ntfs_inode *ni,
   90                 MFT_RECORD *mrec);
   91 extern void ntfs_attr_put_search_ctx(ntfs_attr_search_ctx *ctx);
   92 
   93 #ifdef NTFS_RW
   94 
   95 extern int ntfs_attr_size_bounds_check(const ntfs_volume *vol,
   96                 const ATTR_TYPE type, const s64 size);
   97 extern int ntfs_attr_can_be_non_resident(const ntfs_volume *vol,
   98                 const ATTR_TYPE type);
   99 extern int ntfs_attr_can_be_resident(const ntfs_volume *vol,
  100                 const ATTR_TYPE type);
  101 
  102 extern int ntfs_attr_record_resize(MFT_RECORD *m, ATTR_RECORD *a, u32 new_size);
  103 extern int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a,
  104                 const u32 new_size);
  105 
  106 extern int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size);
  107 
  108 extern s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size,
  109                 const s64 new_data_size, const s64 data_start);
  110 
  111 extern int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt,
  112                 const u8 val);
  113 
  114 #endif /* NTFS_RW */
  115 
  116 #endif /* _LINUX_NTFS_ATTRIB_H */

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