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a1d312de | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 | 2 | /* |
ce1bafa0 | 3 | * ntfs.h - Defines for NTFS Linux kernel driver. |
1da177e4 | 4 | * |
ce1bafa0 | 5 | * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc. |
1da177e4 | 6 | * Copyright (C) 2002 Richard Russon |
1da177e4 LT |
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> | |
7fafb8b6 | 19 | #include <linux/pagemap.h> |
1da177e4 LT |
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, | |
bb3cf335 | 30 | NTFS_MAX_ATTR_NAME_LEN = 255, |
7fafb8b6 | 31 | NTFS_MAX_CLUSTER_SIZE = 64 * 1024, /* 64kiB */ |
09cbfeaf | 32 | NTFS_MAX_PAGES_PER_CLUSTER = NTFS_MAX_CLUSTER_SIZE / PAGE_SIZE, |
1da177e4 LT |
33 | } NTFS_CONSTANTS; |
34 | ||
35 | /* Global variables. */ | |
36 | ||
37 | /* Slab caches (from super.c). */ | |
64419d93 PE |
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; | |
1da177e4 LT |
43 | |
44 | /* The various operations structs defined throughout the driver files. */ | |
ce1bafa0 AA |
45 | extern const struct address_space_operations ntfs_normal_aops; |
46 | extern const struct address_space_operations ntfs_compressed_aops; | |
f5e54d6e | 47 | extern const struct address_space_operations ntfs_mst_aops; |
1da177e4 | 48 | |
4b6f5d20 | 49 | extern const struct file_operations ntfs_file_ops; |
92e1d5be | 50 | extern const struct inode_operations ntfs_file_inode_ops; |
1da177e4 | 51 | |
4b6f5d20 | 52 | extern const struct file_operations ntfs_dir_ops; |
92e1d5be | 53 | extern const struct inode_operations ntfs_dir_inode_ops; |
1da177e4 | 54 | |
4b6f5d20 | 55 | extern const struct file_operations ntfs_empty_file_ops; |
92e1d5be | 56 | extern const struct inode_operations ntfs_empty_inode_ops; |
1da177e4 | 57 | |
39655164 | 58 | extern const struct export_operations ntfs_export_ops; |
41382686 | 59 | |
1da177e4 LT |
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 | |
4e5e529a | 80 | extern struct mutex ntfs_lock; |
1da177e4 LT |
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 */ | |
c49c3111 | 94 | extern bool ntfs_are_names_equal(const ntfschar *s1, size_t s1_len, |
1da177e4 LT |
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 | ||
b9a2838c AM |
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 | ||
1da177e4 | 150 | #endif /* _LINUX_NTFS_H */ |