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 */ 117