1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * ntfs.h - Defines for NTFS Linux kernel driver. |
4 | * |
5 | * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc. |
6 | * Copyright (C) 2002 Richard Russon |
7 | */ |
8 | |
9 | #ifndef _LINUX_NTFS_H |
10 | #define _LINUX_NTFS_H |
11 | |
12 | #include <linux/stddef.h> |
13 | #include <linux/kernel.h> |
14 | #include <linux/module.h> |
15 | #include <linux/compiler.h> |
16 | #include <linux/fs.h> |
17 | #include <linux/nls.h> |
18 | #include <linux/smp.h> |
19 | #include <linux/pagemap.h> |
20 | |
21 | #include "types.h" |
22 | #include "volume.h" |
23 | #include "layout.h" |
24 | |
25 | typedef enum { |
26 | NTFS_BLOCK_SIZE = 512, |
27 | NTFS_BLOCK_SIZE_BITS = 9, |
28 | NTFS_SB_MAGIC = 0x5346544e, /* 'NTFS' */ |
29 | NTFS_MAX_NAME_LEN = 255, |
30 | NTFS_MAX_ATTR_NAME_LEN = 255, |
31 | NTFS_MAX_CLUSTER_SIZE = 64 * 1024, /* 64kiB */ |
32 | NTFS_MAX_PAGES_PER_CLUSTER = NTFS_MAX_CLUSTER_SIZE / PAGE_SIZE, |
33 | } NTFS_CONSTANTS; |
34 | |
35 | /* Global variables. */ |
36 | |
37 | /* Slab caches (from super.c). */ |
38 | extern struct kmem_cache *ntfs_name_cache; |
39 | extern struct kmem_cache *ntfs_inode_cache; |
40 | extern struct kmem_cache *ntfs_big_inode_cache; |
41 | extern struct kmem_cache *ntfs_attr_ctx_cache; |
42 | extern struct kmem_cache *ntfs_index_ctx_cache; |
43 | |
44 | /* The various operations structs defined throughout the driver files. */ |
45 | extern const struct address_space_operations ntfs_normal_aops; |
46 | extern const struct address_space_operations ntfs_compressed_aops; |
47 | extern const struct address_space_operations ntfs_mst_aops; |
48 | |
49 | extern const struct file_operations ntfs_file_ops; |
50 | extern const struct inode_operations ntfs_file_inode_ops; |
51 | |
52 | extern const struct file_operations ntfs_dir_ops; |
53 | extern const struct inode_operations ntfs_dir_inode_ops; |
54 | |
55 | extern const struct file_operations ntfs_empty_file_ops; |
56 | extern const struct inode_operations ntfs_empty_inode_ops; |
57 | |
58 | extern const struct export_operations ntfs_export_ops; |
59 | |
60 | /** |
61 | * NTFS_SB - return the ntfs volume given a vfs super block |
62 | * @sb: VFS super block |
63 | * |
64 | * NTFS_SB() returns the ntfs volume associated with the VFS super block @sb. |
65 | */ |
66 | static inline ntfs_volume *NTFS_SB(struct super_block *sb) |
67 | { |
68 | return sb->s_fs_info; |
69 | } |
70 | |
71 | /* Declarations of functions and global variables. */ |
72 | |
73 | /* From fs/ntfs/compress.c */ |
74 | extern int ntfs_read_compressed_block(struct page *page); |
75 | extern int allocate_compression_buffers(void); |
76 | extern void free_compression_buffers(void); |
77 | |
78 | /* From fs/ntfs/super.c */ |
79 | #define default_upcase_len 0x10000 |
80 | extern struct mutex ntfs_lock; |
81 | |
82 | typedef struct { |
83 | int val; |
84 | char *str; |
85 | } option_t; |
86 | extern const option_t on_errors_arr[]; |
87 | |
88 | /* From fs/ntfs/mst.c */ |
89 | extern int post_read_mst_fixup(NTFS_RECORD *b, const u32 size); |
90 | extern int pre_write_mst_fixup(NTFS_RECORD *b, const u32 size); |
91 | extern void post_write_mst_fixup(NTFS_RECORD *b); |
92 | |
93 | /* From fs/ntfs/unistr.c */ |
94 | extern bool ntfs_are_names_equal(const ntfschar *s1, size_t s1_len, |
95 | const ntfschar *s2, size_t s2_len, |
96 | const IGNORE_CASE_BOOL ic, |
97 | const ntfschar *upcase, const u32 upcase_size); |
98 | extern int ntfs_collate_names(const ntfschar *name1, const u32 name1_len, |
99 | const ntfschar *name2, const u32 name2_len, |
100 | const int err_val, const IGNORE_CASE_BOOL ic, |
101 | const ntfschar *upcase, const u32 upcase_len); |
102 | extern int ntfs_ucsncmp(const ntfschar *s1, const ntfschar *s2, size_t n); |
103 | extern int ntfs_ucsncasecmp(const ntfschar *s1, const ntfschar *s2, size_t n, |
104 | const ntfschar *upcase, const u32 upcase_size); |
105 | extern void ntfs_upcase_name(ntfschar *name, u32 name_len, |
106 | const ntfschar *upcase, const u32 upcase_len); |
107 | extern void ntfs_file_upcase_value(FILE_NAME_ATTR *file_name_attr, |
108 | const ntfschar *upcase, const u32 upcase_len); |
109 | extern int ntfs_file_compare_values(FILE_NAME_ATTR *file_name_attr1, |
110 | FILE_NAME_ATTR *file_name_attr2, |
111 | const int err_val, const IGNORE_CASE_BOOL ic, |
112 | const ntfschar *upcase, const u32 upcase_len); |
113 | extern int ntfs_nlstoucs(const ntfs_volume *vol, const char *ins, |
114 | const int ins_len, ntfschar **outs); |
115 | extern int ntfs_ucstonls(const ntfs_volume *vol, const ntfschar *ins, |
116 | const int ins_len, unsigned char **outs, int outs_len); |
117 | |
118 | /* From fs/ntfs/upcase.c */ |
119 | extern ntfschar *generate_default_upcase(void); |
120 | |
121 | static inline int ntfs_ffs(int x) |
122 | { |
123 | int r = 1; |
124 | |
125 | if (!x) |
126 | return 0; |
127 | if (!(x & 0xffff)) { |
128 | x >>= 16; |
129 | r += 16; |
130 | } |
131 | if (!(x & 0xff)) { |
132 | x >>= 8; |
133 | r += 8; |
134 | } |
135 | if (!(x & 0xf)) { |
136 | x >>= 4; |
137 | r += 4; |
138 | } |
139 | if (!(x & 3)) { |
140 | x >>= 2; |
141 | r += 2; |
142 | } |
143 | if (!(x & 1)) { |
144 | x >>= 1; |
145 | r += 1; |
146 | } |
147 | return r; |
148 | } |
149 | |
150 | #endif /* _LINUX_NTFS_H */ |
151 | |