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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 */ |
| 117 |
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