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review.trustedfirmware.org / hafnium / third_party / linux.git / 0f672f6c0b52b7b0700b0915c72b540721af4465 / . / fs / ntfs / ntfs.h
blob: e81376ea915247157be4b63d0ef028136178c088 [file] [log] [blame]
David Brazdil0f672f62019-12-10 10:32:29 +0000[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0-or-later */
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
Andrew Scullb4b6d4a2019-01-02 15:54:55 +0000[diff] [blame]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
25typedef 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). */
38extern struct kmem_cache *ntfs_name_cache;
39extern struct kmem_cache *ntfs_inode_cache;
40extern struct kmem_cache *ntfs_big_inode_cache;
41extern struct kmem_cache *ntfs_attr_ctx_cache;
42extern struct kmem_cache *ntfs_index_ctx_cache;
43
44/* The various operations structs defined throughout the driver files. */
45extern const struct address_space_operations ntfs_normal_aops;
46extern const struct address_space_operations ntfs_compressed_aops;
47extern const struct address_space_operations ntfs_mst_aops;
48
49extern const struct file_operations ntfs_file_ops;
50extern const struct inode_operations ntfs_file_inode_ops;
51
52extern const struct file_operations ntfs_dir_ops;
53extern const struct inode_operations ntfs_dir_inode_ops;
54
55extern const struct file_operations ntfs_empty_file_ops;
56extern const struct inode_operations ntfs_empty_inode_ops;
57
58extern 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 */
66static 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 */
74extern int ntfs_read_compressed_block(struct page *page);
75extern int allocate_compression_buffers(void);
76extern void free_compression_buffers(void);
77
78/* From fs/ntfs/super.c */
79#define default_upcase_len 0x10000
80extern struct mutex ntfs_lock;
81
82typedef struct {
83 int val;
84 char *str;
85} option_t;
86extern const option_t on_errors_arr[];
87
88/* From fs/ntfs/mst.c */
89extern int post_read_mst_fixup(NTFS_RECORD *b, const u32 size);
90extern int pre_write_mst_fixup(NTFS_RECORD *b, const u32 size);
91extern void post_write_mst_fixup(NTFS_RECORD *b);
92
93/* From fs/ntfs/unistr.c */
94extern 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);
98extern 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);
102extern int ntfs_ucsncmp(const ntfschar *s1, const ntfschar *s2, size_t n);
103extern int ntfs_ucsncasecmp(const ntfschar *s1, const ntfschar *s2, size_t n,
104 const ntfschar *upcase, const u32 upcase_size);
105extern void ntfs_upcase_name(ntfschar *name, u32 name_len,
106 const ntfschar *upcase, const u32 upcase_len);
107extern void ntfs_file_upcase_value(FILE_NAME_ATTR *file_name_attr,
108 const ntfschar *upcase, const u32 upcase_len);
109extern 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);
113extern int ntfs_nlstoucs(const ntfs_volume *vol, const char *ins,
114 const int ins_len, ntfschar **outs);
115extern 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 */
119extern ntfschar *generate_default_upcase(void);
120
121static 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 */