]>
Commit | Line | Data |
---|---|---|
a1d312de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 LT |
2 | /* |
3 | * attrib.h - Defines for attribute handling in NTFS Linux kernel driver. | |
4 | * Part of the Linux-NTFS project. | |
5 | * | |
271849a9 | 6 | * Copyright (c) 2001-2005 Anton Altaparmakov |
1da177e4 | 7 | * Copyright (c) 2002 Richard Russon |
1da177e4 LT |
8 | */ |
9 | ||
10 | #ifndef _LINUX_NTFS_ATTRIB_H | |
11 | #define _LINUX_NTFS_ATTRIB_H | |
12 | ||
13 | #include "endian.h" | |
14 | #include "types.h" | |
15 | #include "layout.h" | |
16 | #include "inode.h" | |
17 | #include "runlist.h" | |
18 | #include "volume.h" | |
19 | ||
20 | /** | |
21 | * ntfs_attr_search_ctx - used in attribute search functions | |
22 | * @mrec: buffer containing mft record to search | |
23 | * @attr: attribute record in @mrec where to begin/continue search | |
24 | * @is_first: if true ntfs_attr_lookup() begins search with @attr, else after | |
25 | * | |
26 | * Structure must be initialized to zero before the first call to one of the | |
27 | * attribute search functions. Initialize @mrec to point to the mft record to | |
28 | * search, and @attr to point to the first attribute within @mrec (not necessary | |
c49c3111 | 29 | * if calling the _first() functions), and set @is_first to 'true' (not necessary |
1da177e4 LT |
30 | * if calling the _first() functions). |
31 | * | |
c49c3111 | 32 | * If @is_first is 'true', the search begins with @attr. If @is_first is 'false', |
1da177e4 LT |
33 | * the search begins after @attr. This is so that, after the first call to one |
34 | * of the search attribute functions, we can call the function again, without | |
35 | * any modification of the search context, to automagically get the next | |
36 | * matching attribute. | |
37 | */ | |
38 | typedef struct { | |
39 | MFT_RECORD *mrec; | |
40 | ATTR_RECORD *attr; | |
c49c3111 | 41 | bool is_first; |
1da177e4 LT |
42 | ntfs_inode *ntfs_ino; |
43 | ATTR_LIST_ENTRY *al_entry; | |
44 | ntfs_inode *base_ntfs_ino; | |
45 | MFT_RECORD *base_mrec; | |
46 | ATTR_RECORD *base_attr; | |
47 | } ntfs_attr_search_ctx; | |
48 | ||
fd9d6367 AA |
49 | extern int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn, |
50 | ntfs_attr_search_ctx *ctx); | |
1da177e4 LT |
51 | extern int ntfs_map_runlist(ntfs_inode *ni, VCN vcn); |
52 | ||
271849a9 | 53 | extern LCN ntfs_attr_vcn_to_lcn_nolock(ntfs_inode *ni, const VCN vcn, |
c49c3111 | 54 | const bool write_locked); |
271849a9 | 55 | |
c0c1cc0e | 56 | extern runlist_element *ntfs_attr_find_vcn_nolock(ntfs_inode *ni, |
69b41e3c | 57 | const VCN vcn, ntfs_attr_search_ctx *ctx); |
1da177e4 LT |
58 | |
59 | int ntfs_attr_lookup(const ATTR_TYPE type, const ntfschar *name, | |
60 | const u32 name_len, const IGNORE_CASE_BOOL ic, | |
61 | const VCN lowest_vcn, const u8 *val, const u32 val_len, | |
62 | ntfs_attr_search_ctx *ctx); | |
63 | ||
64 | extern int load_attribute_list(ntfs_volume *vol, runlist *rl, u8 *al_start, | |
65 | const s64 size, const s64 initialized_size); | |
66 | ||
67 | static inline s64 ntfs_attr_size(const ATTR_RECORD *a) | |
68 | { | |
69 | if (!a->non_resident) | |
70 | return (s64)le32_to_cpu(a->data.resident.value_length); | |
71 | return sle64_to_cpu(a->data.non_resident.data_size); | |
72 | } | |
73 | ||
74 | extern void ntfs_attr_reinit_search_ctx(ntfs_attr_search_ctx *ctx); | |
75 | extern ntfs_attr_search_ctx *ntfs_attr_get_search_ctx(ntfs_inode *ni, | |
76 | MFT_RECORD *mrec); | |
77 | extern void ntfs_attr_put_search_ctx(ntfs_attr_search_ctx *ctx); | |
78 | ||
53d59aad AA |
79 | #ifdef NTFS_RW |
80 | ||
1da177e4 LT |
81 | extern int ntfs_attr_size_bounds_check(const ntfs_volume *vol, |
82 | const ATTR_TYPE type, const s64 size); | |
83 | extern int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, | |
84 | const ATTR_TYPE type); | |
85 | extern int ntfs_attr_can_be_resident(const ntfs_volume *vol, | |
86 | const ATTR_TYPE type); | |
87 | ||
88 | extern int ntfs_attr_record_resize(MFT_RECORD *m, ATTR_RECORD *a, u32 new_size); | |
0aacceac AA |
89 | extern int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a, |
90 | const u32 new_size); | |
1da177e4 | 91 | |
8925d4f0 | 92 | extern int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size); |
2bfb4fff | 93 | |
2d86829b AA |
94 | extern s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size, |
95 | const s64 new_data_size, const s64 data_start); | |
96 | ||
1da177e4 LT |
97 | extern int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt, |
98 | const u8 val); | |
99 | ||
53d59aad AA |
100 | #endif /* NTFS_RW */ |
101 | ||
1da177e4 | 102 | #endif /* _LINUX_NTFS_ATTRIB_H */ |