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