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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* ntfs.h - Defines for NTFS Linux kernel driver.
*
* Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
* Copyright (C) 2002 Richard Russon
*/
#ifndef _LINUX_NTFS_H
#define _LINUX_NTFS_H
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/compiler.h>
#include <linux/fs.h>
#include <linux/nls.h>
#include <linux/smp.h>
#include <linux/pagemap.h>
#include "types.h"
#include "volume.h"
#include "layout.h"
typedef enum {
NTFS_BLOCK_SIZE = 512,
NTFS_BLOCK_SIZE_BITS = 9,
NTFS_SB_MAGIC = 0x5346544e, /* 'NTFS' */
NTFS_MAX_NAME_LEN = 255,
NTFS_MAX_ATTR_NAME_LEN = 255,
NTFS_MAX_CLUSTER_SIZE = 64 * 1024, /* 64kiB */
NTFS_MAX_PAGES_PER_CLUSTER = NTFS_MAX_CLUSTER_SIZE / PAGE_SIZE,
} NTFS_CONSTANTS;
/* Global variables. */
/* Slab caches (from super.c). */
extern struct kmem_cache *ntfs_name_cache;
extern struct kmem_cache *ntfs_inode_cache;
extern struct kmem_cache *ntfs_big_inode_cache;
extern struct kmem_cache *ntfs_attr_ctx_cache;
extern struct kmem_cache *ntfs_index_ctx_cache;
/* The various operations structs defined throughout the driver files. */
extern const struct address_space_operations ntfs_normal_aops;
extern const struct address_space_operations ntfs_compressed_aops;
extern const struct address_space_operations ntfs_mst_aops;
extern const struct file_operations ntfs_file_ops;
extern const struct inode_operations ntfs_file_inode_ops;
extern const struct file_operations ntfs_dir_ops;
extern const struct inode_operations ntfs_dir_inode_ops;
extern const struct file_operations ntfs_empty_file_ops;
extern const struct inode_operations ntfs_empty_inode_ops;
extern const struct export_operations ntfs_export_ops;
/**
* NTFS_SB - return the ntfs volume given a vfs super block
* @sb: VFS super block
*
* NTFS_SB() returns the ntfs volume associated with the VFS super block @sb.
*/
static inline ntfs_volume *NTFS_SB(struct super_block *sb)
{
return sb->s_fs_info;
}
/* Declarations of functions and global variables. */
/* From fs/ntfs/compress.c */
extern int ntfs_read_compressed_block(struct page *page);
extern int allocate_compression_buffers(void);
extern void free_compression_buffers(void);
/* From fs/ntfs/super.c */
#define default_upcase_len 0x10000
extern struct mutex ntfs_lock;
typedef struct {
int val;
char *str;
} option_t;
extern const option_t on_errors_arr[];
/* From fs/ntfs/mst.c */
extern int post_read_mst_fixup(NTFS_RECORD *b, const u32 size);
extern int pre_write_mst_fixup(NTFS_RECORD *b, const u32 size);
extern void post_write_mst_fixup(NTFS_RECORD *b);
/* From fs/ntfs/unistr.c */
extern bool ntfs_are_names_equal(const ntfschar *s1, size_t s1_len,
const ntfschar *s2, size_t s2_len,
const IGNORE_CASE_BOOL ic,
const ntfschar *upcase, const u32 upcase_size);
extern int ntfs_collate_names(const ntfschar *name1, const u32 name1_len,
const ntfschar *name2, const u32 name2_len,
const int err_val, const IGNORE_CASE_BOOL ic,
const ntfschar *upcase, const u32 upcase_len);
extern int ntfs_ucsncmp(const ntfschar *s1, const ntfschar *s2, size_t n);
extern int ntfs_ucsncasecmp(const ntfschar *s1, const ntfschar *s2, size_t n,
const ntfschar *upcase, const u32 upcase_size);
extern void ntfs_upcase_name(ntfschar *name, u32 name_len,
const ntfschar *upcase, const u32 upcase_len);
extern void ntfs_file_upcase_value(FILE_NAME_ATTR *file_name_attr,
const ntfschar *upcase, const u32 upcase_len);
extern int ntfs_file_compare_values(FILE_NAME_ATTR *file_name_attr1,
FILE_NAME_ATTR *file_name_attr2,
const int err_val, const IGNORE_CASE_BOOL ic,
const ntfschar *upcase, const u32 upcase_len);
extern int ntfs_nlstoucs(const ntfs_volume *vol, const char *ins,
const int ins_len, ntfschar **outs);
extern int ntfs_ucstonls(const ntfs_volume *vol, const ntfschar *ins,
const int ins_len, unsigned char **outs, int outs_len);
/* From fs/ntfs/upcase.c */
extern ntfschar *generate_default_upcase(void);
static inline int ntfs_ffs(int x)
{
int r = 1;
if (!x)
return 0;
if (!(x & 0xffff)) {
x >>= 16;
r += 16;
}
if (!(x & 0xff)) {
x >>= 8;
r += 8;
}
if (!(x & 0xf)) {
x >>= 4;
r += 4;
}
if (!(x & 3)) {
x >>= 2;
r += 2;
}
if (!(x & 1)) {
x >>= 1;
r += 1;
}
return r;
}
#endif /* _LINUX_NTFS_H */
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