/* 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 */