xref: /openbmc/linux/fs/ntfs3/ntfs_fs.h (revision 2a12187d)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *
4  * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
5  *
6  */
7 
8 // clang-format off
9 #ifndef _LINUX_NTFS3_NTFS_FS_H
10 #define _LINUX_NTFS3_NTFS_FS_H
11 
12 #include <linux/blkdev.h>
13 #include <linux/buffer_head.h>
14 #include <linux/fs.h>
15 #include <linux/highmem.h>
16 #include <linux/kernel.h>
17 #include <linux/mm.h>
18 #include <linux/mutex.h>
19 #include <linux/page-flags.h>
20 #include <linux/pagemap.h>
21 #include <linux/rbtree.h>
22 #include <linux/rwsem.h>
23 #include <linux/slab.h>
24 #include <linux/string.h>
25 #include <linux/time64.h>
26 #include <linux/types.h>
27 #include <linux/uidgid.h>
28 #include <asm/div64.h>
29 #include <asm/page.h>
30 
31 #include "debug.h"
32 #include "ntfs.h"
33 
34 struct dentry;
35 struct fiemap_extent_info;
36 struct user_namespace;
37 struct page;
38 struct writeback_control;
39 enum utf16_endian;
40 
41 
42 #define MINUS_ONE_T			((size_t)(-1))
43 /* Biggest MFT / smallest cluster */
44 #define MAXIMUM_BYTES_PER_MFT		4096
45 #define NTFS_BLOCKS_PER_MFT_RECORD	(MAXIMUM_BYTES_PER_MFT / 512)
46 
47 #define MAXIMUM_BYTES_PER_INDEX		4096
48 #define NTFS_BLOCKS_PER_INODE		(MAXIMUM_BYTES_PER_INDEX / 512)
49 
50 /* NTFS specific error code when fixup failed. */
51 #define E_NTFS_FIXUP			555
52 /* NTFS specific error code about resident->nonresident. */
53 #define E_NTFS_NONRESIDENT		556
54 /* NTFS specific error code about punch hole. */
55 #define E_NTFS_NOTALIGNED		557
56 
57 
58 /* sbi->flags */
59 #define NTFS_FLAGS_NODISCARD		0x00000001
60 /* Set when LogFile is replaying. */
61 #define NTFS_FLAGS_LOG_REPLAYING	0x00000008
62 /* Set when we changed first MFT's which copy must be updated in $MftMirr. */
63 #define NTFS_FLAGS_MFTMIRR		0x00001000
64 #define NTFS_FLAGS_NEED_REPLAY		0x04000000
65 
66 
67 /* ni->ni_flags */
68 /*
69  * Data attribute is external compressed (LZX/Xpress)
70  * 1 - WOF_COMPRESSION_XPRESS4K
71  * 2 - WOF_COMPRESSION_XPRESS8K
72  * 3 - WOF_COMPRESSION_XPRESS16K
73  * 4 - WOF_COMPRESSION_LZX32K
74  */
75 #define NI_FLAG_COMPRESSED_MASK		0x0000000f
76 /* Data attribute is deduplicated. */
77 #define NI_FLAG_DEDUPLICATED		0x00000010
78 #define NI_FLAG_EA			0x00000020
79 #define NI_FLAG_DIR			0x00000040
80 #define NI_FLAG_RESIDENT		0x00000080
81 #define NI_FLAG_UPDATE_PARENT		0x00000100
82 // clang-format on
83 
84 struct ntfs_mount_options {
85 	char *nls_name;
86 	struct nls_table *nls;
87 
88 	kuid_t fs_uid;
89 	kgid_t fs_gid;
90 	u16 fs_fmask_inv;
91 	u16 fs_dmask_inv;
92 
93 	unsigned fmask : 1; /* fmask was set. */
94 	unsigned dmask : 1; /*dmask was set. */
95 	unsigned sys_immutable : 1; /* Immutable system files. */
96 	unsigned discard : 1; /* Issue discard requests on deletions. */
97 	unsigned sparse : 1; /* Create sparse files. */
98 	unsigned showmeta : 1; /* Show meta files. */
99 	unsigned nohidden : 1; /* Do not show hidden files. */
100 	unsigned hide_dot_files : 1; /* Set hidden flag on dot files. */
101 	unsigned windows_names : 1; /* Disallow names forbidden by Windows. */
102 	unsigned force : 1; /* RW mount dirty volume. */
103 	unsigned noacsrules : 1; /* Exclude acs rules. */
104 	unsigned prealloc : 1; /* Preallocate space when file is growing. */
105 	unsigned nocase : 1; /* case insensitive. */
106 };
107 
108 /* Special value to unpack and deallocate. */
109 #define RUN_DEALLOCATE ((struct runs_tree *)(size_t)1)
110 
111 /* TODO: Use rb tree instead of array. */
112 struct runs_tree {
113 	struct ntfs_run *runs;
114 	size_t count; /* Currently used size a ntfs_run storage. */
115 	size_t allocated; /* Currently allocated ntfs_run storage size. */
116 };
117 
118 struct ntfs_buffers {
119 	/* Biggest MFT / smallest cluster = 4096 / 512 = 8 */
120 	/* Biggest index / smallest cluster = 4096 / 512 = 8 */
121 	struct buffer_head *bh[PAGE_SIZE >> SECTOR_SHIFT];
122 	u32 bytes;
123 	u32 nbufs;
124 	u32 off;
125 };
126 
127 enum ALLOCATE_OPT {
128 	ALLOCATE_DEF = 0, // Allocate all clusters.
129 	ALLOCATE_MFT = 1, // Allocate for MFT.
130 	ALLOCATE_ZERO = 2, // Zeroout new allocated clusters
131 };
132 
133 enum bitmap_mutex_classes {
134 	BITMAP_MUTEX_CLUSTERS = 0,
135 	BITMAP_MUTEX_MFT = 1,
136 };
137 
138 struct wnd_bitmap {
139 	struct super_block *sb;
140 	struct rw_semaphore rw_lock;
141 
142 	struct runs_tree run;
143 	size_t nbits;
144 
145 	size_t total_zeroes; // Total number of free bits.
146 	u16 *free_bits; // Free bits in each window.
147 	size_t nwnd;
148 	u32 bits_last; // Bits in last window.
149 
150 	struct rb_root start_tree; // Extents, sorted by 'start'.
151 	struct rb_root count_tree; // Extents, sorted by 'count + start'.
152 	size_t count; // Extents count.
153 
154 	/*
155 	 * -1 Tree is activated but not updated (too many fragments).
156 	 * 0 - Tree is not activated.
157 	 * 1 - Tree is activated and updated.
158 	 */
159 	int uptodated;
160 	size_t extent_min; // Minimal extent used while building.
161 	size_t extent_max; // Upper estimate of biggest free block.
162 
163 	/* Zone [bit, end) */
164 	size_t zone_bit;
165 	size_t zone_end;
166 
167 	bool set_tail; // Not necessary in driver.
168 	bool inited;
169 };
170 
171 typedef int (*NTFS_CMP_FUNC)(const void *key1, size_t len1, const void *key2,
172 			     size_t len2, const void *param);
173 
174 enum index_mutex_classed {
175 	INDEX_MUTEX_I30 = 0,
176 	INDEX_MUTEX_SII = 1,
177 	INDEX_MUTEX_SDH = 2,
178 	INDEX_MUTEX_SO = 3,
179 	INDEX_MUTEX_SQ = 4,
180 	INDEX_MUTEX_SR = 5,
181 	INDEX_MUTEX_TOTAL
182 };
183 
184 /* ntfs_index - Allocation unit inside directory. */
185 struct ntfs_index {
186 	struct runs_tree bitmap_run;
187 	struct runs_tree alloc_run;
188 	/* read/write access to 'bitmap_run'/'alloc_run' while ntfs_readdir */
189 	struct rw_semaphore run_lock;
190 
191 	/*TODO: Remove 'cmp'. */
192 	NTFS_CMP_FUNC cmp;
193 
194 	u8 index_bits; // log2(root->index_block_size)
195 	u8 idx2vbn_bits; // log2(root->index_block_clst)
196 	u8 vbn2vbo_bits; // index_block_size < cluster? 9 : cluster_bits
197 	u8 type; // index_mutex_classed
198 };
199 
200 /* Minimum MFT zone. */
201 #define NTFS_MIN_MFT_ZONE 100
202 /* Step to increase the MFT. */
203 #define NTFS_MFT_INCREASE_STEP 1024
204 
205 /* Ntfs file system in-core superblock data. */
206 struct ntfs_sb_info {
207 	struct super_block *sb;
208 
209 	u32 discard_granularity;
210 	u64 discard_granularity_mask_inv; // ~(discard_granularity_mask_inv-1)
211 
212 	u32 cluster_size; // bytes per cluster
213 	u32 cluster_mask; // == cluster_size - 1
214 	u64 cluster_mask_inv; // ~(cluster_size - 1)
215 	u32 block_mask; // sb->s_blocksize - 1
216 	u32 blocks_per_cluster; // cluster_size / sb->s_blocksize
217 
218 	u32 record_size;
219 	u32 index_size;
220 
221 	u8 cluster_bits;
222 	u8 record_bits;
223 
224 	u64 maxbytes; // Maximum size for normal files.
225 	u64 maxbytes_sparse; // Maximum size for sparse file.
226 
227 	u32 flags; // See NTFS_FLAGS_XXX.
228 
229 	CLST zone_max; // Maximum MFT zone length in clusters
230 	CLST bad_clusters; // The count of marked bad clusters.
231 
232 	u16 max_bytes_per_attr; // Maximum attribute size in record.
233 	u16 attr_size_tr; // Attribute size threshold (320 bytes).
234 
235 	/* Records in $Extend. */
236 	CLST objid_no;
237 	CLST quota_no;
238 	CLST reparse_no;
239 	CLST usn_jrnl_no;
240 
241 	struct ATTR_DEF_ENTRY *def_table; // Attribute definition table.
242 	u32 def_entries;
243 	u32 ea_max_size;
244 
245 	struct MFT_REC *new_rec;
246 
247 	u16 *upcase;
248 
249 	struct {
250 		u64 lbo, lbo2;
251 		struct ntfs_inode *ni;
252 		struct wnd_bitmap bitmap; // $MFT::Bitmap
253 		/*
254 		 * MFT records [11-24) used to expand MFT itself.
255 		 * They always marked as used in $MFT::Bitmap
256 		 * 'reserved_bitmap' contains real bitmap of these records.
257 		 */
258 		ulong reserved_bitmap; // Bitmap of used records [11 - 24)
259 		size_t next_free; // The next record to allocate from
260 		size_t used; // MFT valid size in records.
261 		u32 recs_mirr; // Number of records in MFTMirr
262 		u8 next_reserved;
263 		u8 reserved_bitmap_inited;
264 	} mft;
265 
266 	struct {
267 		struct wnd_bitmap bitmap; // $Bitmap::Data
268 		CLST next_free_lcn;
269 	} used;
270 
271 	struct {
272 		u64 size; // In bytes.
273 		u64 blocks; // In blocks.
274 		u64 ser_num;
275 		struct ntfs_inode *ni;
276 		__le16 flags; // Cached current VOLUME_INFO::flags, VOLUME_FLAG_DIRTY.
277 		u8 major_ver;
278 		u8 minor_ver;
279 		char label[65];
280 		bool real_dirty; // Real fs state.
281 	} volume;
282 
283 	struct {
284 		struct ntfs_index index_sii;
285 		struct ntfs_index index_sdh;
286 		struct ntfs_inode *ni;
287 		u32 next_id;
288 		u64 next_off;
289 
290 		__le32 def_security_id;
291 	} security;
292 
293 	struct {
294 		struct ntfs_index index_r;
295 		struct ntfs_inode *ni;
296 		u64 max_size; // 16K
297 	} reparse;
298 
299 	struct {
300 		struct ntfs_index index_o;
301 		struct ntfs_inode *ni;
302 	} objid;
303 
304 	struct {
305 		struct mutex mtx_lznt;
306 		struct lznt *lznt;
307 #ifdef CONFIG_NTFS3_LZX_XPRESS
308 		struct mutex mtx_xpress;
309 		struct xpress_decompressor *xpress;
310 		struct mutex mtx_lzx;
311 		struct lzx_decompressor *lzx;
312 #endif
313 	} compress;
314 
315 	struct ntfs_mount_options *options;
316 	struct ratelimit_state msg_ratelimit;
317 };
318 
319 /* One MFT record(usually 1024 bytes), consists of attributes. */
320 struct mft_inode {
321 	struct rb_node node;
322 	struct ntfs_sb_info *sbi;
323 
324 	struct MFT_REC *mrec;
325 	struct ntfs_buffers nb;
326 
327 	CLST rno;
328 	bool dirty;
329 };
330 
331 /* Nested class for ntfs_inode::ni_lock. */
332 enum ntfs_inode_mutex_lock_class {
333 	NTFS_INODE_MUTEX_DIRTY,
334 	NTFS_INODE_MUTEX_SECURITY,
335 	NTFS_INODE_MUTEX_OBJID,
336 	NTFS_INODE_MUTEX_REPARSE,
337 	NTFS_INODE_MUTEX_NORMAL,
338 	NTFS_INODE_MUTEX_PARENT,
339 	NTFS_INODE_MUTEX_PARENT2,
340 };
341 
342 /*
343  * sturct ntfs_inode
344  *
345  * Ntfs inode - extends linux inode. consists of one or more MFT inodes.
346  */
347 struct ntfs_inode {
348 	struct mft_inode mi; // base record
349 
350 	/*
351 	 * Valid size: [0 - i_valid) - these range in file contains valid data.
352 	 * Range [i_valid - inode->i_size) - contains 0.
353 	 * Usually i_valid <= inode->i_size.
354 	 */
355 	u64 i_valid;
356 	struct timespec64 i_crtime;
357 
358 	struct mutex ni_lock;
359 
360 	/* File attributes from std. */
361 	enum FILE_ATTRIBUTE std_fa;
362 	__le32 std_security_id;
363 
364 	/*
365 	 * Tree of mft_inode.
366 	 * Not empty when primary MFT record (usually 1024 bytes) can't save all attributes
367 	 * e.g. file becomes too fragmented or contains a lot of names.
368 	 */
369 	struct rb_root mi_tree;
370 
371 	/*
372 	 * This member is used in ntfs_readdir to ensure that all subrecords are loaded
373 	 */
374 	u8 mi_loaded;
375 
376 	union {
377 		struct ntfs_index dir;
378 		struct {
379 			struct rw_semaphore run_lock;
380 			struct runs_tree run;
381 #ifdef CONFIG_NTFS3_LZX_XPRESS
382 			struct page *offs_page;
383 #endif
384 		} file;
385 	};
386 
387 	struct {
388 		struct runs_tree run;
389 		struct ATTR_LIST_ENTRY *le; // 1K aligned memory.
390 		size_t size;
391 		bool dirty;
392 	} attr_list;
393 
394 	size_t ni_flags; // NI_FLAG_XXX
395 
396 	struct inode vfs_inode;
397 };
398 
399 struct indx_node {
400 	struct ntfs_buffers nb;
401 	struct INDEX_BUFFER *index;
402 };
403 
404 struct ntfs_fnd {
405 	int level;
406 	struct indx_node *nodes[20];
407 	struct NTFS_DE *de[20];
408 	struct NTFS_DE *root_de;
409 };
410 
411 enum REPARSE_SIGN {
412 	REPARSE_NONE = 0,
413 	REPARSE_COMPRESSED = 1,
414 	REPARSE_DEDUPLICATED = 2,
415 	REPARSE_LINK = 3
416 };
417 
418 /* Functions from attrib.c */
419 int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
420 			   CLST vcn, CLST lcn, CLST len, CLST *pre_alloc,
421 			   enum ALLOCATE_OPT opt, CLST *alen, const size_t fr,
422 			   CLST *new_lcn, CLST *new_len);
423 int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
424 			  struct ATTR_LIST_ENTRY *le, struct mft_inode *mi,
425 			  u64 new_size, struct runs_tree *run,
426 			  struct ATTRIB **ins_attr, struct page *page);
427 int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
428 		  const __le16 *name, u8 name_len, struct runs_tree *run,
429 		  u64 new_size, const u64 *new_valid, bool keep_prealloc,
430 		  struct ATTRIB **ret);
431 int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
432 			CLST *len, bool *new, bool zero);
433 int attr_data_read_resident(struct ntfs_inode *ni, struct page *page);
434 int attr_data_write_resident(struct ntfs_inode *ni, struct page *page);
435 int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type,
436 		       const __le16 *name, u8 name_len, struct runs_tree *run,
437 		       CLST vcn);
438 int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type,
439 			 const __le16 *name, u8 name_len, struct runs_tree *run,
440 			 u64 from, u64 to);
441 int attr_wof_frame_info(struct ntfs_inode *ni, struct ATTRIB *attr,
442 			struct runs_tree *run, u64 frame, u64 frames,
443 			u8 frame_bits, u32 *ondisk_size, u64 *vbo_data);
444 int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr,
445 			     CLST frame, CLST *clst_data);
446 int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size,
447 			u64 new_valid);
448 int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes);
449 int attr_insert_range(struct ntfs_inode *ni, u64 vbo, u64 bytes);
450 int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size);
451 
452 /* Functions from attrlist.c */
453 void al_destroy(struct ntfs_inode *ni);
454 bool al_verify(struct ntfs_inode *ni);
455 int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr);
456 struct ATTR_LIST_ENTRY *al_enumerate(struct ntfs_inode *ni,
457 				     struct ATTR_LIST_ENTRY *le);
458 struct ATTR_LIST_ENTRY *al_find_le(struct ntfs_inode *ni,
459 				   struct ATTR_LIST_ENTRY *le,
460 				   const struct ATTRIB *attr);
461 struct ATTR_LIST_ENTRY *al_find_ex(struct ntfs_inode *ni,
462 				   struct ATTR_LIST_ENTRY *le,
463 				   enum ATTR_TYPE type, const __le16 *name,
464 				   u8 name_len, const CLST *vcn);
465 int al_add_le(struct ntfs_inode *ni, enum ATTR_TYPE type, const __le16 *name,
466 	      u8 name_len, CLST svcn, __le16 id, const struct MFT_REF *ref,
467 	      struct ATTR_LIST_ENTRY **new_le);
468 bool al_remove_le(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le);
469 bool al_delete_le(struct ntfs_inode *ni, enum ATTR_TYPE type, CLST vcn,
470 		  const __le16 *name, size_t name_len,
471 		  const struct MFT_REF *ref);
472 int al_update(struct ntfs_inode *ni, int sync);
473 static inline size_t al_aligned(size_t size)
474 {
475 	return (size + 1023) & ~(size_t)1023;
476 }
477 
478 /* Globals from bitfunc.c */
479 bool are_bits_clear(const void *map, size_t bit, size_t nbits);
480 bool are_bits_set(const void *map, size_t bit, size_t nbits);
481 size_t get_set_bits_ex(const void *map, size_t bit, size_t nbits);
482 
483 /* Globals from dir.c */
484 int ntfs_utf16_to_nls(struct ntfs_sb_info *sbi, const __le16 *name, u32 len,
485 		      u8 *buf, int buf_len);
486 int ntfs_nls_to_utf16(struct ntfs_sb_info *sbi, const u8 *name, u32 name_len,
487 		      struct cpu_str *uni, u32 max_ulen,
488 		      enum utf16_endian endian);
489 struct inode *dir_search_u(struct inode *dir, const struct cpu_str *uni,
490 			   struct ntfs_fnd *fnd);
491 bool dir_is_empty(struct inode *dir);
492 extern const struct file_operations ntfs_dir_operations;
493 
494 /* Globals from file.c */
495 int ntfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
496 		 struct kstat *stat, u32 request_mask, u32 flags);
497 int ntfs3_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
498 		  struct iattr *attr);
499 int ntfs_file_open(struct inode *inode, struct file *file);
500 int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
501 		__u64 start, __u64 len);
502 extern const struct inode_operations ntfs_special_inode_operations;
503 extern const struct inode_operations ntfs_file_inode_operations;
504 extern const struct file_operations ntfs_file_operations;
505 
506 /* Globals from frecord.c */
507 void ni_remove_mi(struct ntfs_inode *ni, struct mft_inode *mi);
508 struct ATTR_STD_INFO *ni_std(struct ntfs_inode *ni);
509 struct ATTR_STD_INFO5 *ni_std5(struct ntfs_inode *ni);
510 void ni_clear(struct ntfs_inode *ni);
511 int ni_load_mi_ex(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
512 int ni_load_mi(struct ntfs_inode *ni, const struct ATTR_LIST_ENTRY *le,
513 	       struct mft_inode **mi);
514 struct ATTRIB *ni_find_attr(struct ntfs_inode *ni, struct ATTRIB *attr,
515 			    struct ATTR_LIST_ENTRY **entry_o,
516 			    enum ATTR_TYPE type, const __le16 *name,
517 			    u8 name_len, const CLST *vcn,
518 			    struct mft_inode **mi);
519 struct ATTRIB *ni_enum_attr_ex(struct ntfs_inode *ni, struct ATTRIB *attr,
520 			       struct ATTR_LIST_ENTRY **le,
521 			       struct mft_inode **mi);
522 struct ATTRIB *ni_load_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
523 			    const __le16 *name, u8 name_len, CLST vcn,
524 			    struct mft_inode **pmi);
525 int ni_load_all_mi(struct ntfs_inode *ni);
526 bool ni_add_subrecord(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
527 int ni_remove_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
528 		   const __le16 *name, size_t name_len, bool base_only,
529 		   const __le16 *id);
530 int ni_create_attr_list(struct ntfs_inode *ni);
531 int ni_expand_list(struct ntfs_inode *ni);
532 int ni_insert_nonresident(struct ntfs_inode *ni, enum ATTR_TYPE type,
533 			  const __le16 *name, u8 name_len,
534 			  const struct runs_tree *run, CLST svcn, CLST len,
535 			  __le16 flags, struct ATTRIB **new_attr,
536 			  struct mft_inode **mi, struct ATTR_LIST_ENTRY **le);
537 int ni_insert_resident(struct ntfs_inode *ni, u32 data_size,
538 		       enum ATTR_TYPE type, const __le16 *name, u8 name_len,
539 		       struct ATTRIB **new_attr, struct mft_inode **mi,
540 		       struct ATTR_LIST_ENTRY **le);
541 void ni_remove_attr_le(struct ntfs_inode *ni, struct ATTRIB *attr,
542 		       struct mft_inode *mi, struct ATTR_LIST_ENTRY *le);
543 int ni_delete_all(struct ntfs_inode *ni);
544 struct ATTR_FILE_NAME *ni_fname_name(struct ntfs_inode *ni,
545 				     const struct cpu_str *uni,
546 				     const struct MFT_REF *home,
547 				     struct mft_inode **mi,
548 				     struct ATTR_LIST_ENTRY **entry);
549 struct ATTR_FILE_NAME *ni_fname_type(struct ntfs_inode *ni, u8 name_type,
550 				     struct mft_inode **mi,
551 				     struct ATTR_LIST_ENTRY **entry);
552 int ni_new_attr_flags(struct ntfs_inode *ni, enum FILE_ATTRIBUTE new_fa);
553 enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
554 				   struct REPARSE_DATA_BUFFER *buffer);
555 int ni_write_inode(struct inode *inode, int sync, const char *hint);
556 #define _ni_write_inode(i, w) ni_write_inode(i, w, __func__)
557 int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
558 	      __u64 vbo, __u64 len);
559 int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page);
560 int ni_decompress_file(struct ntfs_inode *ni);
561 int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
562 		  u32 pages_per_frame);
563 int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
564 		   u32 pages_per_frame);
565 int ni_remove_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
566 		   struct NTFS_DE *de, struct NTFS_DE **de2, int *undo_step);
567 
568 bool ni_remove_name_undo(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
569 			 struct NTFS_DE *de, struct NTFS_DE *de2,
570 			 int undo_step);
571 
572 int ni_add_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
573 		struct NTFS_DE *de);
574 
575 int ni_rename(struct ntfs_inode *dir_ni, struct ntfs_inode *new_dir_ni,
576 	      struct ntfs_inode *ni, struct NTFS_DE *de, struct NTFS_DE *new_de,
577 	      bool *is_bad);
578 
579 bool ni_is_dirty(struct inode *inode);
580 
581 /* Globals from fslog.c */
582 int log_replay(struct ntfs_inode *ni, bool *initialized);
583 
584 /* Globals from fsntfs.c */
585 bool ntfs_fix_pre_write(struct NTFS_RECORD_HEADER *rhdr, size_t bytes);
586 int ntfs_fix_post_read(struct NTFS_RECORD_HEADER *rhdr, size_t bytes,
587 		       bool simple);
588 int ntfs_extend_init(struct ntfs_sb_info *sbi);
589 int ntfs_loadlog_and_replay(struct ntfs_inode *ni, struct ntfs_sb_info *sbi);
590 int ntfs_look_for_free_space(struct ntfs_sb_info *sbi, CLST lcn, CLST len,
591 			     CLST *new_lcn, CLST *new_len,
592 			     enum ALLOCATE_OPT opt);
593 bool ntfs_check_for_free_space(struct ntfs_sb_info *sbi, CLST clen, CLST mlen);
594 int ntfs_look_free_mft(struct ntfs_sb_info *sbi, CLST *rno, bool mft,
595 		       struct ntfs_inode *ni, struct mft_inode **mi);
596 void ntfs_mark_rec_free(struct ntfs_sb_info *sbi, CLST rno, bool is_mft);
597 int ntfs_clear_mft_tail(struct ntfs_sb_info *sbi, size_t from, size_t to);
598 int ntfs_refresh_zone(struct ntfs_sb_info *sbi);
599 void ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait);
600 void ntfs_bad_inode(struct inode *inode, const char *hint);
601 #define _ntfs_bad_inode(i) ntfs_bad_inode(i, __func__)
602 enum NTFS_DIRTY_FLAGS {
603 	NTFS_DIRTY_CLEAR = 0,
604 	NTFS_DIRTY_DIRTY = 1,
605 	NTFS_DIRTY_ERROR = 2,
606 };
607 int ntfs_set_state(struct ntfs_sb_info *sbi, enum NTFS_DIRTY_FLAGS dirty);
608 int ntfs_sb_read(struct super_block *sb, u64 lbo, size_t bytes, void *buffer);
609 int ntfs_sb_write(struct super_block *sb, u64 lbo, size_t bytes,
610 		  const void *buffer, int wait);
611 int ntfs_sb_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run,
612 		      u64 vbo, const void *buf, size_t bytes, int sync);
613 struct buffer_head *ntfs_bread_run(struct ntfs_sb_info *sbi,
614 				   const struct runs_tree *run, u64 vbo);
615 int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
616 		     u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb);
617 int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
618 		 struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
619 		 struct ntfs_buffers *nb);
620 int ntfs_get_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
621 		u32 bytes, struct ntfs_buffers *nb);
622 int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr,
623 		  struct ntfs_buffers *nb, int sync);
624 int ntfs_bio_pages(struct ntfs_sb_info *sbi, const struct runs_tree *run,
625 		   struct page **pages, u32 nr_pages, u64 vbo, u32 bytes,
626 		   enum req_op op);
627 int ntfs_bio_fill_1(struct ntfs_sb_info *sbi, const struct runs_tree *run);
628 int ntfs_vbo_to_lbo(struct ntfs_sb_info *sbi, const struct runs_tree *run,
629 		    u64 vbo, u64 *lbo, u64 *bytes);
630 struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST nRec,
631 				  bool dir);
632 extern const u8 s_default_security[0x50];
633 bool is_sd_valid(const struct SECURITY_DESCRIPTOR_RELATIVE *sd, u32 len);
634 int ntfs_security_init(struct ntfs_sb_info *sbi);
635 int ntfs_get_security_by_id(struct ntfs_sb_info *sbi, __le32 security_id,
636 			    struct SECURITY_DESCRIPTOR_RELATIVE **sd,
637 			    size_t *size);
638 int ntfs_insert_security(struct ntfs_sb_info *sbi,
639 			 const struct SECURITY_DESCRIPTOR_RELATIVE *sd,
640 			 u32 size, __le32 *security_id, bool *inserted);
641 int ntfs_reparse_init(struct ntfs_sb_info *sbi);
642 int ntfs_objid_init(struct ntfs_sb_info *sbi);
643 int ntfs_objid_remove(struct ntfs_sb_info *sbi, struct GUID *guid);
644 int ntfs_insert_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
645 			const struct MFT_REF *ref);
646 int ntfs_remove_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
647 			const struct MFT_REF *ref);
648 void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim);
649 int run_deallocate(struct ntfs_sb_info *sbi, struct runs_tree *run, bool trim);
650 bool valid_windows_name(struct ntfs_sb_info *sbi, const struct le_str *name);
651 
652 /* Globals from index.c */
653 int indx_used_bit(struct ntfs_index *indx, struct ntfs_inode *ni, size_t *bit);
654 void fnd_clear(struct ntfs_fnd *fnd);
655 static inline struct ntfs_fnd *fnd_get(void)
656 {
657 	return kzalloc(sizeof(struct ntfs_fnd), GFP_NOFS);
658 }
659 static inline void fnd_put(struct ntfs_fnd *fnd)
660 {
661 	if (fnd) {
662 		fnd_clear(fnd);
663 		kfree(fnd);
664 	}
665 }
666 void indx_clear(struct ntfs_index *idx);
667 int indx_init(struct ntfs_index *indx, struct ntfs_sb_info *sbi,
668 	      const struct ATTRIB *attr, enum index_mutex_classed type);
669 struct INDEX_ROOT *indx_get_root(struct ntfs_index *indx, struct ntfs_inode *ni,
670 				 struct ATTRIB **attr, struct mft_inode **mi);
671 int indx_read(struct ntfs_index *idx, struct ntfs_inode *ni, CLST vbn,
672 	      struct indx_node **node);
673 int indx_find(struct ntfs_index *indx, struct ntfs_inode *dir,
674 	      const struct INDEX_ROOT *root, const void *Key, size_t KeyLen,
675 	      const void *param, int *diff, struct NTFS_DE **entry,
676 	      struct ntfs_fnd *fnd);
677 int indx_find_sort(struct ntfs_index *indx, struct ntfs_inode *ni,
678 		   const struct INDEX_ROOT *root, struct NTFS_DE **entry,
679 		   struct ntfs_fnd *fnd);
680 int indx_find_raw(struct ntfs_index *indx, struct ntfs_inode *ni,
681 		  const struct INDEX_ROOT *root, struct NTFS_DE **entry,
682 		  size_t *off, struct ntfs_fnd *fnd);
683 int indx_insert_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
684 		      const struct NTFS_DE *new_de, const void *param,
685 		      struct ntfs_fnd *fnd, bool undo);
686 int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
687 		      const void *key, u32 key_len, const void *param);
688 int indx_update_dup(struct ntfs_inode *ni, struct ntfs_sb_info *sbi,
689 		    const struct ATTR_FILE_NAME *fname,
690 		    const struct NTFS_DUP_INFO *dup, int sync);
691 
692 /* Globals from inode.c */
693 struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
694 			 const struct cpu_str *name);
695 int ntfs_set_size(struct inode *inode, u64 new_size);
696 int reset_log_file(struct inode *inode);
697 int ntfs_get_block(struct inode *inode, sector_t vbn,
698 		   struct buffer_head *bh_result, int create);
699 int ntfs_write_begin(struct file *file, struct address_space *mapping,
700 		     loff_t pos, u32 len, struct page **pagep, void **fsdata);
701 int ntfs_write_end(struct file *file, struct address_space *mapping,
702 		   loff_t pos, u32 len, u32 copied, struct page *page,
703 		   void *fsdata);
704 int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc);
705 int ntfs_sync_inode(struct inode *inode);
706 int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,
707 		      struct inode *i2);
708 int inode_write_data(struct inode *inode, const void *data, size_t bytes);
709 struct inode *ntfs_create_inode(struct user_namespace *mnt_userns,
710 				struct inode *dir, struct dentry *dentry,
711 				const struct cpu_str *uni, umode_t mode,
712 				dev_t dev, const char *symname, u32 size,
713 				struct ntfs_fnd *fnd);
714 int ntfs_link_inode(struct inode *inode, struct dentry *dentry);
715 int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry);
716 void ntfs_evict_inode(struct inode *inode);
717 extern const struct inode_operations ntfs_link_inode_operations;
718 extern const struct address_space_operations ntfs_aops;
719 extern const struct address_space_operations ntfs_aops_cmpr;
720 
721 /* Globals from name_i.c */
722 int fill_name_de(struct ntfs_sb_info *sbi, void *buf, const struct qstr *name,
723 		 const struct cpu_str *uni);
724 struct dentry *ntfs3_get_parent(struct dentry *child);
725 
726 extern const struct inode_operations ntfs_dir_inode_operations;
727 extern const struct inode_operations ntfs_special_inode_operations;
728 extern const struct dentry_operations ntfs_dentry_ops;
729 
730 /* Globals from record.c */
731 int mi_get(struct ntfs_sb_info *sbi, CLST rno, struct mft_inode **mi);
732 void mi_put(struct mft_inode *mi);
733 int mi_init(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno);
734 int mi_read(struct mft_inode *mi, bool is_mft);
735 struct ATTRIB *mi_enum_attr(struct mft_inode *mi, struct ATTRIB *attr);
736 // TODO: id?
737 struct ATTRIB *mi_find_attr(struct mft_inode *mi, struct ATTRIB *attr,
738 			    enum ATTR_TYPE type, const __le16 *name,
739 			    size_t name_len, const __le16 *id);
740 static inline struct ATTRIB *rec_find_attr_le(struct mft_inode *rec,
741 					      struct ATTR_LIST_ENTRY *le)
742 {
743 	return mi_find_attr(rec, NULL, le->type, le_name(le), le->name_len,
744 			    &le->id);
745 }
746 int mi_write(struct mft_inode *mi, int wait);
747 int mi_format_new(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno,
748 		  __le16 flags, bool is_mft);
749 struct ATTRIB *mi_insert_attr(struct mft_inode *mi, enum ATTR_TYPE type,
750 			      const __le16 *name, u8 name_len, u32 asize,
751 			      u16 name_off);
752 
753 bool mi_remove_attr(struct ntfs_inode *ni, struct mft_inode *mi,
754 		    struct ATTRIB *attr);
755 bool mi_resize_attr(struct mft_inode *mi, struct ATTRIB *attr, int bytes);
756 int mi_pack_runs(struct mft_inode *mi, struct ATTRIB *attr,
757 		 struct runs_tree *run, CLST len);
758 static inline bool mi_is_ref(const struct mft_inode *mi,
759 			     const struct MFT_REF *ref)
760 {
761 	if (le32_to_cpu(ref->low) != mi->rno)
762 		return false;
763 	if (ref->seq != mi->mrec->seq)
764 		return false;
765 
766 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
767 	return le16_to_cpu(ref->high) == (mi->rno >> 32);
768 #else
769 	return !ref->high;
770 #endif
771 }
772 
773 static inline void mi_get_ref(const struct mft_inode *mi, struct MFT_REF *ref)
774 {
775 	ref->low = cpu_to_le32(mi->rno);
776 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
777 	ref->high = cpu_to_le16(mi->rno >> 32);
778 #else
779 	ref->high = 0;
780 #endif
781 	ref->seq = mi->mrec->seq;
782 }
783 
784 /* Globals from run.c */
785 bool run_lookup_entry(const struct runs_tree *run, CLST vcn, CLST *lcn,
786 		      CLST *len, size_t *index);
787 void run_truncate(struct runs_tree *run, CLST vcn);
788 void run_truncate_head(struct runs_tree *run, CLST vcn);
789 void run_truncate_around(struct runs_tree *run, CLST vcn);
790 bool run_add_entry(struct runs_tree *run, CLST vcn, CLST lcn, CLST len,
791 		   bool is_mft);
792 bool run_collapse_range(struct runs_tree *run, CLST vcn, CLST len);
793 bool run_insert_range(struct runs_tree *run, CLST vcn, CLST len);
794 bool run_get_entry(const struct runs_tree *run, size_t index, CLST *vcn,
795 		   CLST *lcn, CLST *len);
796 bool run_is_mapped_full(const struct runs_tree *run, CLST svcn, CLST evcn);
797 
798 int run_pack(const struct runs_tree *run, CLST svcn, CLST len, u8 *run_buf,
799 	     u32 run_buf_size, CLST *packed_vcns);
800 int run_unpack(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
801 	       CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
802 	       int run_buf_size);
803 
804 #ifdef NTFS3_CHECK_FREE_CLST
805 int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
806 		  CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
807 		  int run_buf_size);
808 #else
809 #define run_unpack_ex run_unpack
810 #endif
811 int run_get_highest_vcn(CLST vcn, const u8 *run_buf, u64 *highest_vcn);
812 int run_clone(const struct runs_tree *run, struct runs_tree *new_run);
813 
814 /* Globals from super.c */
815 void *ntfs_set_shared(void *ptr, u32 bytes);
816 void *ntfs_put_shared(void *ptr);
817 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len);
818 int ntfs_discard(struct ntfs_sb_info *sbi, CLST Lcn, CLST Len);
819 
820 /* Globals from bitmap.c*/
821 int __init ntfs3_init_bitmap(void);
822 void ntfs3_exit_bitmap(void);
823 void wnd_close(struct wnd_bitmap *wnd);
824 static inline size_t wnd_zeroes(const struct wnd_bitmap *wnd)
825 {
826 	return wnd->total_zeroes;
827 }
828 int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits);
829 int wnd_set_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
830 int wnd_set_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
831 int wnd_set_used_safe(struct wnd_bitmap *wnd, size_t bit, size_t bits,
832 		      size_t *done);
833 bool wnd_is_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
834 bool wnd_is_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
835 
836 /* Possible values for 'flags' 'wnd_find'. */
837 #define BITMAP_FIND_MARK_AS_USED 0x01
838 #define BITMAP_FIND_FULL 0x02
839 size_t wnd_find(struct wnd_bitmap *wnd, size_t to_alloc, size_t hint,
840 		size_t flags, size_t *allocated);
841 int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits);
842 void wnd_zone_set(struct wnd_bitmap *wnd, size_t Lcn, size_t Len);
843 int ntfs_trim_fs(struct ntfs_sb_info *sbi, struct fstrim_range *range);
844 
845 void ntfs_bitmap_set_le(void *map, unsigned int start, int len);
846 void ntfs_bitmap_clear_le(void *map, unsigned int start, int len);
847 unsigned int ntfs_bitmap_weight_le(const void *bitmap, int bits);
848 
849 /* Globals from upcase.c */
850 int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2,
851 		   const u16 *upcase, bool bothcase);
852 int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
853 		       const u16 *upcase, bool bothcase);
854 unsigned long ntfs_names_hash(const u16 *name, size_t len, const u16 *upcase,
855 			      unsigned long hash);
856 
857 /* globals from xattr.c */
858 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
859 struct posix_acl *ntfs_get_acl(struct inode *inode, int type, bool rcu);
860 int ntfs_set_acl(struct user_namespace *mnt_userns, struct dentry *dentry,
861 		 struct posix_acl *acl, int type);
862 int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
863 		  struct inode *dir);
864 #else
865 #define ntfs_get_acl NULL
866 #define ntfs_set_acl NULL
867 #endif
868 
869 int ntfs_acl_chmod(struct user_namespace *mnt_userns, struct dentry *dentry);
870 int ntfs_permission(struct user_namespace *mnt_userns, struct inode *inode,
871 		    int mask);
872 ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
873 extern const struct xattr_handler *ntfs_xattr_handlers[];
874 
875 int ntfs_save_wsl_perm(struct inode *inode);
876 void ntfs_get_wsl_perm(struct inode *inode);
877 
878 /* globals from lznt.c */
879 struct lznt *get_lznt_ctx(int level);
880 size_t compress_lznt(const void *uncompressed, size_t uncompressed_size,
881 		     void *compressed, size_t compressed_size,
882 		     struct lznt *ctx);
883 ssize_t decompress_lznt(const void *compressed, size_t compressed_size,
884 			void *uncompressed, size_t uncompressed_size);
885 
886 static inline bool is_ntfs3(struct ntfs_sb_info *sbi)
887 {
888 	return sbi->volume.major_ver >= 3;
889 }
890 
891 /* (sb->s_flags & SB_ACTIVE) */
892 static inline bool is_mounted(struct ntfs_sb_info *sbi)
893 {
894 	return !!sbi->sb->s_root;
895 }
896 
897 static inline bool ntfs_is_meta_file(struct ntfs_sb_info *sbi, CLST rno)
898 {
899 	return rno < MFT_REC_FREE || rno == sbi->objid_no ||
900 	       rno == sbi->quota_no || rno == sbi->reparse_no ||
901 	       rno == sbi->usn_jrnl_no;
902 }
903 
904 static inline void ntfs_unmap_page(struct page *page)
905 {
906 	kunmap(page);
907 	put_page(page);
908 }
909 
910 static inline struct page *ntfs_map_page(struct address_space *mapping,
911 					 unsigned long index)
912 {
913 	struct page *page = read_mapping_page(mapping, index, NULL);
914 
915 	if (!IS_ERR(page))
916 		kmap(page);
917 	return page;
918 }
919 
920 static inline size_t wnd_zone_bit(const struct wnd_bitmap *wnd)
921 {
922 	return wnd->zone_bit;
923 }
924 
925 static inline size_t wnd_zone_len(const struct wnd_bitmap *wnd)
926 {
927 	return wnd->zone_end - wnd->zone_bit;
928 }
929 
930 static inline void run_init(struct runs_tree *run)
931 {
932 	run->runs = NULL;
933 	run->count = 0;
934 	run->allocated = 0;
935 }
936 
937 static inline struct runs_tree *run_alloc(void)
938 {
939 	return kzalloc(sizeof(struct runs_tree), GFP_NOFS);
940 }
941 
942 static inline void run_close(struct runs_tree *run)
943 {
944 	kvfree(run->runs);
945 	memset(run, 0, sizeof(*run));
946 }
947 
948 static inline void run_free(struct runs_tree *run)
949 {
950 	if (run) {
951 		kvfree(run->runs);
952 		kfree(run);
953 	}
954 }
955 
956 static inline bool run_is_empty(struct runs_tree *run)
957 {
958 	return !run->count;
959 }
960 
961 /* NTFS uses quad aligned bitmaps. */
962 static inline size_t bitmap_size(size_t bits)
963 {
964 	return ALIGN((bits + 7) >> 3, 8);
965 }
966 
967 #define _100ns2seconds 10000000
968 #define SecondsToStartOf1970 0x00000002B6109100
969 
970 #define NTFS_TIME_GRAN 100
971 
972 /*
973  * kernel2nt - Converts in-memory kernel timestamp into nt time.
974  */
975 static inline __le64 kernel2nt(const struct timespec64 *ts)
976 {
977 	// 10^7 units of 100 nanoseconds one second
978 	return cpu_to_le64(_100ns2seconds *
979 				   (ts->tv_sec + SecondsToStartOf1970) +
980 			   ts->tv_nsec / NTFS_TIME_GRAN);
981 }
982 
983 /*
984  * nt2kernel - Converts on-disk nt time into kernel timestamp.
985  */
986 static inline void nt2kernel(const __le64 tm, struct timespec64 *ts)
987 {
988 	u64 t = le64_to_cpu(tm) - _100ns2seconds * SecondsToStartOf1970;
989 
990 	// WARNING: do_div changes its first argument(!)
991 	ts->tv_nsec = do_div(t, _100ns2seconds) * 100;
992 	ts->tv_sec = t;
993 }
994 
995 static inline struct ntfs_sb_info *ntfs_sb(struct super_block *sb)
996 {
997 	return sb->s_fs_info;
998 }
999 
1000 /*
1001  * ntfs_up_cluster - Align up on cluster boundary.
1002  */
1003 static inline u64 ntfs_up_cluster(const struct ntfs_sb_info *sbi, u64 size)
1004 {
1005 	return (size + sbi->cluster_mask) & sbi->cluster_mask_inv;
1006 }
1007 
1008 /*
1009  * ntfs_up_block - Align up on cluster boundary.
1010  */
1011 static inline u64 ntfs_up_block(const struct super_block *sb, u64 size)
1012 {
1013 	return (size + sb->s_blocksize - 1) & ~(u64)(sb->s_blocksize - 1);
1014 }
1015 
1016 static inline CLST bytes_to_cluster(const struct ntfs_sb_info *sbi, u64 size)
1017 {
1018 	return (size + sbi->cluster_mask) >> sbi->cluster_bits;
1019 }
1020 
1021 static inline u64 bytes_to_block(const struct super_block *sb, u64 size)
1022 {
1023 	return (size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1024 }
1025 
1026 static inline struct buffer_head *ntfs_bread(struct super_block *sb,
1027 					     sector_t block)
1028 {
1029 	struct buffer_head *bh = sb_bread(sb, block);
1030 
1031 	if (bh)
1032 		return bh;
1033 
1034 	ntfs_err(sb, "failed to read volume at offset 0x%llx",
1035 		 (u64)block << sb->s_blocksize_bits);
1036 	return NULL;
1037 }
1038 
1039 static inline struct ntfs_inode *ntfs_i(struct inode *inode)
1040 {
1041 	return container_of(inode, struct ntfs_inode, vfs_inode);
1042 }
1043 
1044 static inline bool is_compressed(const struct ntfs_inode *ni)
1045 {
1046 	return (ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) ||
1047 	       (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
1048 }
1049 
1050 static inline int ni_ext_compress_bits(const struct ntfs_inode *ni)
1051 {
1052 	return 0xb + (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
1053 }
1054 
1055 /* Bits - 0xc, 0xd, 0xe, 0xf, 0x10 */
1056 static inline void ni_set_ext_compress_bits(struct ntfs_inode *ni, u8 bits)
1057 {
1058 	ni->ni_flags |= (bits - 0xb) & NI_FLAG_COMPRESSED_MASK;
1059 }
1060 
1061 static inline bool is_dedup(const struct ntfs_inode *ni)
1062 {
1063 	return ni->ni_flags & NI_FLAG_DEDUPLICATED;
1064 }
1065 
1066 static inline bool is_encrypted(const struct ntfs_inode *ni)
1067 {
1068 	return ni->std_fa & FILE_ATTRIBUTE_ENCRYPTED;
1069 }
1070 
1071 static inline bool is_sparsed(const struct ntfs_inode *ni)
1072 {
1073 	return ni->std_fa & FILE_ATTRIBUTE_SPARSE_FILE;
1074 }
1075 
1076 static inline int is_resident(struct ntfs_inode *ni)
1077 {
1078 	return ni->ni_flags & NI_FLAG_RESIDENT;
1079 }
1080 
1081 static inline void le16_sub_cpu(__le16 *var, u16 val)
1082 {
1083 	*var = cpu_to_le16(le16_to_cpu(*var) - val);
1084 }
1085 
1086 static inline void le32_sub_cpu(__le32 *var, u32 val)
1087 {
1088 	*var = cpu_to_le32(le32_to_cpu(*var) - val);
1089 }
1090 
1091 static inline void nb_put(struct ntfs_buffers *nb)
1092 {
1093 	u32 i, nbufs = nb->nbufs;
1094 
1095 	if (!nbufs)
1096 		return;
1097 
1098 	for (i = 0; i < nbufs; i++)
1099 		put_bh(nb->bh[i]);
1100 	nb->nbufs = 0;
1101 }
1102 
1103 static inline void put_indx_node(struct indx_node *in)
1104 {
1105 	if (!in)
1106 		return;
1107 
1108 	kfree(in->index);
1109 	nb_put(&in->nb);
1110 	kfree(in);
1111 }
1112 
1113 static inline void mi_clear(struct mft_inode *mi)
1114 {
1115 	nb_put(&mi->nb);
1116 	kfree(mi->mrec);
1117 	mi->mrec = NULL;
1118 }
1119 
1120 static inline void ni_lock(struct ntfs_inode *ni)
1121 {
1122 	mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_NORMAL);
1123 }
1124 
1125 static inline void ni_lock_dir(struct ntfs_inode *ni)
1126 {
1127 	mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_PARENT);
1128 }
1129 
1130 static inline void ni_lock_dir2(struct ntfs_inode *ni)
1131 {
1132 	mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_PARENT2);
1133 }
1134 
1135 static inline void ni_unlock(struct ntfs_inode *ni)
1136 {
1137 	mutex_unlock(&ni->ni_lock);
1138 }
1139 
1140 static inline int ni_trylock(struct ntfs_inode *ni)
1141 {
1142 	return mutex_trylock(&ni->ni_lock);
1143 }
1144 
1145 static inline int attr_load_runs_attr(struct ntfs_inode *ni,
1146 				      struct ATTRIB *attr,
1147 				      struct runs_tree *run, CLST vcn)
1148 {
1149 	return attr_load_runs_vcn(ni, attr->type, attr_name(attr),
1150 				  attr->name_len, run, vcn);
1151 }
1152 
1153 static inline void le64_sub_cpu(__le64 *var, u64 val)
1154 {
1155 	*var = cpu_to_le64(le64_to_cpu(*var) - val);
1156 }
1157 
1158 #endif /* _LINUX_NTFS3_NTFS_FS_H */
1159