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 force : 1; /* RW mount dirty volume. */
101 	unsigned noacsrules : 1; /* Exclude acs rules. */
102 	unsigned prealloc : 1; /* Preallocate space when file is growing. */
103 };
104 
105 /* Special value to unpack and deallocate. */
106 #define RUN_DEALLOCATE ((struct runs_tree *)(size_t)1)
107 
108 /* TODO: Use rb tree instead of array. */
109 struct runs_tree {
110 	struct ntfs_run *runs;
111 	size_t count; /* Currently used size a ntfs_run storage. */
112 	size_t allocated; /* Currently allocated ntfs_run storage size. */
113 };
114 
115 struct ntfs_buffers {
116 	/* Biggest MFT / smallest cluster = 4096 / 512 = 8 */
117 	/* Biggest index / smallest cluster = 4096 / 512 = 8 */
118 	struct buffer_head *bh[PAGE_SIZE >> SECTOR_SHIFT];
119 	u32 bytes;
120 	u32 nbufs;
121 	u32 off;
122 };
123 
124 enum ALLOCATE_OPT {
125 	ALLOCATE_DEF = 0, // Allocate all clusters.
126 	ALLOCATE_MFT = 1, // Allocate for MFT.
127 };
128 
129 enum bitmap_mutex_classes {
130 	BITMAP_MUTEX_CLUSTERS = 0,
131 	BITMAP_MUTEX_MFT = 1,
132 };
133 
134 struct wnd_bitmap {
135 	struct super_block *sb;
136 	struct rw_semaphore rw_lock;
137 
138 	struct runs_tree run;
139 	size_t nbits;
140 
141 	size_t total_zeroes; // Total number of free bits.
142 	u16 *free_bits; // Free bits in each window.
143 	size_t nwnd;
144 	u32 bits_last; // Bits in last window.
145 
146 	struct rb_root start_tree; // Extents, sorted by 'start'.
147 	struct rb_root count_tree; // Extents, sorted by 'count + start'.
148 	size_t count; // Extents count.
149 
150 	/*
151 	 * -1 Tree is activated but not updated (too many fragments).
152 	 * 0 - Tree is not activated.
153 	 * 1 - Tree is activated and updated.
154 	 */
155 	int uptodated;
156 	size_t extent_min; // Minimal extent used while building.
157 	size_t extent_max; // Upper estimate of biggest free block.
158 
159 	/* Zone [bit, end) */
160 	size_t zone_bit;
161 	size_t zone_end;
162 
163 	bool set_tail; // Not necessary in driver.
164 	bool inited;
165 };
166 
167 typedef int (*NTFS_CMP_FUNC)(const void *key1, size_t len1, const void *key2,
168 			     size_t len2, const void *param);
169 
170 enum index_mutex_classed {
171 	INDEX_MUTEX_I30 = 0,
172 	INDEX_MUTEX_SII = 1,
173 	INDEX_MUTEX_SDH = 2,
174 	INDEX_MUTEX_SO = 3,
175 	INDEX_MUTEX_SQ = 4,
176 	INDEX_MUTEX_SR = 5,
177 	INDEX_MUTEX_TOTAL
178 };
179 
180 /* ntfs_index - Allocation unit inside directory. */
181 struct ntfs_index {
182 	struct runs_tree bitmap_run;
183 	struct runs_tree alloc_run;
184 	/* read/write access to 'bitmap_run'/'alloc_run' while ntfs_readdir */
185 	struct rw_semaphore run_lock;
186 
187 	/*TODO: Remove 'cmp'. */
188 	NTFS_CMP_FUNC cmp;
189 
190 	u8 index_bits; // log2(root->index_block_size)
191 	u8 idx2vbn_bits; // log2(root->index_block_clst)
192 	u8 vbn2vbo_bits; // index_block_size < cluster? 9 : cluster_bits
193 	u8 type; // index_mutex_classed
194 };
195 
196 /* Minimum MFT zone. */
197 #define NTFS_MIN_MFT_ZONE 100
198 
199 /* Ntfs file system in-core superblock data. */
200 struct ntfs_sb_info {
201 	struct super_block *sb;
202 
203 	u32 discard_granularity;
204 	u64 discard_granularity_mask_inv; // ~(discard_granularity_mask_inv-1)
205 
206 	u32 cluster_size; // bytes per cluster
207 	u32 cluster_mask; // == cluster_size - 1
208 	u64 cluster_mask_inv; // ~(cluster_size - 1)
209 	u32 block_mask; // sb->s_blocksize - 1
210 	u32 blocks_per_cluster; // cluster_size / sb->s_blocksize
211 
212 	u32 record_size;
213 	u32 index_size;
214 
215 	u8 cluster_bits;
216 	u8 record_bits;
217 
218 	u64 maxbytes; // Maximum size for normal files.
219 	u64 maxbytes_sparse; // Maximum size for sparse file.
220 
221 	u32 flags; // See NTFS_FLAGS_XXX.
222 
223 	CLST zone_max; // Maximum MFT zone length in clusters
224 	CLST bad_clusters; // The count of marked bad clusters.
225 
226 	u16 max_bytes_per_attr; // Maximum attribute size in record.
227 	u16 attr_size_tr; // Attribute size threshold (320 bytes).
228 
229 	/* Records in $Extend. */
230 	CLST objid_no;
231 	CLST quota_no;
232 	CLST reparse_no;
233 	CLST usn_jrnl_no;
234 
235 	struct ATTR_DEF_ENTRY *def_table; // Attribute definition table.
236 	u32 def_entries;
237 	u32 ea_max_size;
238 
239 	struct MFT_REC *new_rec;
240 
241 	u16 *upcase;
242 
243 	struct {
244 		u64 lbo, lbo2;
245 		struct ntfs_inode *ni;
246 		struct wnd_bitmap bitmap; // $MFT::Bitmap
247 		/*
248 		 * MFT records [11-24) used to expand MFT itself.
249 		 * They always marked as used in $MFT::Bitmap
250 		 * 'reserved_bitmap' contains real bitmap of these records.
251 		 */
252 		ulong reserved_bitmap; // Bitmap of used records [11 - 24)
253 		size_t next_free; // The next record to allocate from
254 		size_t used; // MFT valid size in records.
255 		u32 recs_mirr; // Number of records in MFTMirr
256 		u8 next_reserved;
257 		u8 reserved_bitmap_inited;
258 	} mft;
259 
260 	struct {
261 		struct wnd_bitmap bitmap; // $Bitmap::Data
262 		CLST next_free_lcn;
263 	} used;
264 
265 	struct {
266 		u64 size; // In bytes.
267 		u64 blocks; // In blocks.
268 		u64 ser_num;
269 		struct ntfs_inode *ni;
270 		__le16 flags; // Cached current VOLUME_INFO::flags, VOLUME_FLAG_DIRTY.
271 		u8 major_ver;
272 		u8 minor_ver;
273 		char label[65];
274 		bool real_dirty; // Real fs state.
275 	} volume;
276 
277 	struct {
278 		struct ntfs_index index_sii;
279 		struct ntfs_index index_sdh;
280 		struct ntfs_inode *ni;
281 		u32 next_id;
282 		u64 next_off;
283 
284 		__le32 def_security_id;
285 	} security;
286 
287 	struct {
288 		struct ntfs_index index_r;
289 		struct ntfs_inode *ni;
290 		u64 max_size; // 16K
291 	} reparse;
292 
293 	struct {
294 		struct ntfs_index index_o;
295 		struct ntfs_inode *ni;
296 	} objid;
297 
298 	struct {
299 		struct mutex mtx_lznt;
300 		struct lznt *lznt;
301 #ifdef CONFIG_NTFS3_LZX_XPRESS
302 		struct mutex mtx_xpress;
303 		struct xpress_decompressor *xpress;
304 		struct mutex mtx_lzx;
305 		struct lzx_decompressor *lzx;
306 #endif
307 	} compress;
308 
309 	struct ntfs_mount_options *options;
310 	struct ratelimit_state msg_ratelimit;
311 };
312 
313 /* One MFT record(usually 1024 bytes), consists of attributes. */
314 struct mft_inode {
315 	struct rb_node node;
316 	struct ntfs_sb_info *sbi;
317 
318 	struct MFT_REC *mrec;
319 	struct ntfs_buffers nb;
320 
321 	CLST rno;
322 	bool dirty;
323 };
324 
325 /* Nested class for ntfs_inode::ni_lock. */
326 enum ntfs_inode_mutex_lock_class {
327 	NTFS_INODE_MUTEX_DIRTY,
328 	NTFS_INODE_MUTEX_SECURITY,
329 	NTFS_INODE_MUTEX_OBJID,
330 	NTFS_INODE_MUTEX_REPARSE,
331 	NTFS_INODE_MUTEX_NORMAL,
332 	NTFS_INODE_MUTEX_PARENT,
333 };
334 
335 /*
336  * sturct ntfs_inode
337  *
338  * Ntfs inode - extends linux inode. consists of one or more MFT inodes.
339  */
340 struct ntfs_inode {
341 	struct mft_inode mi; // base record
342 
343 	/*
344 	 * Valid size: [0 - i_valid) - these range in file contains valid data.
345 	 * Range [i_valid - inode->i_size) - contains 0.
346 	 * Usually i_valid <= inode->i_size.
347 	 */
348 	u64 i_valid;
349 	struct timespec64 i_crtime;
350 
351 	struct mutex ni_lock;
352 
353 	/* File attributes from std. */
354 	enum FILE_ATTRIBUTE std_fa;
355 	__le32 std_security_id;
356 
357 	/*
358 	 * Tree of mft_inode.
359 	 * Not empty when primary MFT record (usually 1024 bytes) can't save all attributes
360 	 * e.g. file becomes too fragmented or contains a lot of names.
361 	 */
362 	struct rb_root mi_tree;
363 
364 	/*
365 	 * This member is used in ntfs_readdir to ensure that all subrecords are loaded
366 	 */
367 	u8 mi_loaded;
368 
369 	union {
370 		struct ntfs_index dir;
371 		struct {
372 			struct rw_semaphore run_lock;
373 			struct runs_tree run;
374 #ifdef CONFIG_NTFS3_LZX_XPRESS
375 			struct page *offs_page;
376 #endif
377 		} file;
378 	};
379 
380 	struct {
381 		struct runs_tree run;
382 		struct ATTR_LIST_ENTRY *le; // 1K aligned memory.
383 		size_t size;
384 		bool dirty;
385 	} attr_list;
386 
387 	size_t ni_flags; // NI_FLAG_XXX
388 
389 	struct inode vfs_inode;
390 };
391 
392 struct indx_node {
393 	struct ntfs_buffers nb;
394 	struct INDEX_BUFFER *index;
395 };
396 
397 struct ntfs_fnd {
398 	int level;
399 	struct indx_node *nodes[20];
400 	struct NTFS_DE *de[20];
401 	struct NTFS_DE *root_de;
402 };
403 
404 enum REPARSE_SIGN {
405 	REPARSE_NONE = 0,
406 	REPARSE_COMPRESSED = 1,
407 	REPARSE_DEDUPLICATED = 2,
408 	REPARSE_LINK = 3
409 };
410 
411 /* Functions from attrib.c */
412 int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
413 			   CLST vcn, CLST lcn, CLST len, CLST *pre_alloc,
414 			   enum ALLOCATE_OPT opt, CLST *alen, const size_t fr,
415 			   CLST *new_lcn);
416 int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
417 			  struct ATTR_LIST_ENTRY *le, struct mft_inode *mi,
418 			  u64 new_size, struct runs_tree *run,
419 			  struct ATTRIB **ins_attr, struct page *page);
420 int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
421 		  const __le16 *name, u8 name_len, struct runs_tree *run,
422 		  u64 new_size, const u64 *new_valid, bool keep_prealloc,
423 		  struct ATTRIB **ret);
424 int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
425 			CLST *len, bool *new);
426 int attr_data_read_resident(struct ntfs_inode *ni, struct page *page);
427 int attr_data_write_resident(struct ntfs_inode *ni, struct page *page);
428 int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type,
429 		       const __le16 *name, u8 name_len, struct runs_tree *run,
430 		       CLST vcn);
431 int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type,
432 			 const __le16 *name, u8 name_len, struct runs_tree *run,
433 			 u64 from, u64 to);
434 int attr_wof_frame_info(struct ntfs_inode *ni, struct ATTRIB *attr,
435 			struct runs_tree *run, u64 frame, u64 frames,
436 			u8 frame_bits, u32 *ondisk_size, u64 *vbo_data);
437 int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr,
438 			     CLST frame, CLST *clst_data);
439 int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size,
440 			u64 new_valid);
441 int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes);
442 int attr_insert_range(struct ntfs_inode *ni, u64 vbo, u64 bytes);
443 int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size);
444 
445 /* Functions from attrlist.c */
446 void al_destroy(struct ntfs_inode *ni);
447 bool al_verify(struct ntfs_inode *ni);
448 int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr);
449 struct ATTR_LIST_ENTRY *al_enumerate(struct ntfs_inode *ni,
450 				     struct ATTR_LIST_ENTRY *le);
451 struct ATTR_LIST_ENTRY *al_find_le(struct ntfs_inode *ni,
452 				   struct ATTR_LIST_ENTRY *le,
453 				   const struct ATTRIB *attr);
454 struct ATTR_LIST_ENTRY *al_find_ex(struct ntfs_inode *ni,
455 				   struct ATTR_LIST_ENTRY *le,
456 				   enum ATTR_TYPE type, const __le16 *name,
457 				   u8 name_len, const CLST *vcn);
458 int al_add_le(struct ntfs_inode *ni, enum ATTR_TYPE type, const __le16 *name,
459 	      u8 name_len, CLST svcn, __le16 id, const struct MFT_REF *ref,
460 	      struct ATTR_LIST_ENTRY **new_le);
461 bool al_remove_le(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le);
462 bool al_delete_le(struct ntfs_inode *ni, enum ATTR_TYPE type, CLST vcn,
463 		  const __le16 *name, size_t name_len,
464 		  const struct MFT_REF *ref);
465 int al_update(struct ntfs_inode *ni, int sync);
al_aligned(size_t size)466 static inline size_t al_aligned(size_t size)
467 {
468 	return (size + 1023) & ~(size_t)1023;
469 }
470 
471 /* Globals from bitfunc.c */
472 bool are_bits_clear(const ulong *map, size_t bit, size_t nbits);
473 bool are_bits_set(const ulong *map, size_t bit, size_t nbits);
474 size_t get_set_bits_ex(const ulong *map, size_t bit, size_t nbits);
475 
476 /* Globals from dir.c */
477 int ntfs_utf16_to_nls(struct ntfs_sb_info *sbi, const __le16 *name, u32 len,
478 		      u8 *buf, int buf_len);
479 int ntfs_nls_to_utf16(struct ntfs_sb_info *sbi, const u8 *name, u32 name_len,
480 		      struct cpu_str *uni, u32 max_ulen,
481 		      enum utf16_endian endian);
482 struct inode *dir_search_u(struct inode *dir, const struct cpu_str *uni,
483 			   struct ntfs_fnd *fnd);
484 bool dir_is_empty(struct inode *dir);
485 extern const struct file_operations ntfs_dir_operations;
486 
487 /* Globals from file.c */
488 int ntfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
489 		 struct kstat *stat, u32 request_mask, u32 flags);
490 void ntfs_sparse_cluster(struct inode *inode, struct page *page0, CLST vcn,
491 			 CLST len);
492 int ntfs3_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
493 		  struct iattr *attr);
494 int ntfs_file_open(struct inode *inode, struct file *file);
495 int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
496 		__u64 start, __u64 len);
497 extern const struct inode_operations ntfs_special_inode_operations;
498 extern const struct inode_operations ntfs_file_inode_operations;
499 extern const struct file_operations ntfs_file_operations;
500 
501 /* Globals from frecord.c */
502 void ni_remove_mi(struct ntfs_inode *ni, struct mft_inode *mi);
503 struct ATTR_STD_INFO *ni_std(struct ntfs_inode *ni);
504 struct ATTR_STD_INFO5 *ni_std5(struct ntfs_inode *ni);
505 void ni_clear(struct ntfs_inode *ni);
506 int ni_load_mi_ex(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
507 int ni_load_mi(struct ntfs_inode *ni, const struct ATTR_LIST_ENTRY *le,
508 	       struct mft_inode **mi);
509 struct ATTRIB *ni_find_attr(struct ntfs_inode *ni, struct ATTRIB *attr,
510 			    struct ATTR_LIST_ENTRY **entry_o,
511 			    enum ATTR_TYPE type, const __le16 *name,
512 			    u8 name_len, const CLST *vcn,
513 			    struct mft_inode **mi);
514 struct ATTRIB *ni_enum_attr_ex(struct ntfs_inode *ni, struct ATTRIB *attr,
515 			       struct ATTR_LIST_ENTRY **le,
516 			       struct mft_inode **mi);
517 struct ATTRIB *ni_load_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
518 			    const __le16 *name, u8 name_len, CLST vcn,
519 			    struct mft_inode **pmi);
520 int ni_load_all_mi(struct ntfs_inode *ni);
521 bool ni_add_subrecord(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
522 int ni_remove_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
523 		   const __le16 *name, size_t name_len, bool base_only,
524 		   const __le16 *id);
525 int ni_create_attr_list(struct ntfs_inode *ni);
526 int ni_expand_list(struct ntfs_inode *ni);
527 int ni_insert_nonresident(struct ntfs_inode *ni, enum ATTR_TYPE type,
528 			  const __le16 *name, u8 name_len,
529 			  const struct runs_tree *run, CLST svcn, CLST len,
530 			  __le16 flags, struct ATTRIB **new_attr,
531 			  struct mft_inode **mi, struct ATTR_LIST_ENTRY **le);
532 int ni_insert_resident(struct ntfs_inode *ni, u32 data_size,
533 		       enum ATTR_TYPE type, const __le16 *name, u8 name_len,
534 		       struct ATTRIB **new_attr, struct mft_inode **mi,
535 		       struct ATTR_LIST_ENTRY **le);
536 void ni_remove_attr_le(struct ntfs_inode *ni, struct ATTRIB *attr,
537 		       struct mft_inode *mi, struct ATTR_LIST_ENTRY *le);
538 int ni_delete_all(struct ntfs_inode *ni);
539 struct ATTR_FILE_NAME *ni_fname_name(struct ntfs_inode *ni,
540 				     const struct cpu_str *uni,
541 				     const struct MFT_REF *home,
542 				     struct mft_inode **mi,
543 				     struct ATTR_LIST_ENTRY **entry);
544 struct ATTR_FILE_NAME *ni_fname_type(struct ntfs_inode *ni, u8 name_type,
545 				     struct mft_inode **mi,
546 				     struct ATTR_LIST_ENTRY **entry);
547 int ni_new_attr_flags(struct ntfs_inode *ni, enum FILE_ATTRIBUTE new_fa);
548 enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
549 				   struct REPARSE_DATA_BUFFER *buffer);
550 int ni_write_inode(struct inode *inode, int sync, const char *hint);
551 #define _ni_write_inode(i, w) ni_write_inode(i, w, __func__)
552 int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
553 	      __u64 vbo, __u64 len);
554 int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page);
555 int ni_decompress_file(struct ntfs_inode *ni);
556 int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
557 		  u32 pages_per_frame);
558 int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
559 		   u32 pages_per_frame);
560 int ni_remove_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
561 		   struct NTFS_DE *de, struct NTFS_DE **de2, int *undo_step);
562 
563 bool ni_remove_name_undo(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
564 			 struct NTFS_DE *de, struct NTFS_DE *de2,
565 			 int undo_step);
566 
567 int ni_add_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
568 		struct NTFS_DE *de);
569 
570 int ni_rename(struct ntfs_inode *dir_ni, struct ntfs_inode *new_dir_ni,
571 	      struct ntfs_inode *ni, struct NTFS_DE *de, struct NTFS_DE *new_de,
572 	      bool *is_bad);
573 
574 bool ni_is_dirty(struct inode *inode);
575 
576 /* Globals from fslog.c */
577 int log_replay(struct ntfs_inode *ni, bool *initialized);
578 
579 /* Globals from fsntfs.c */
580 bool ntfs_fix_pre_write(struct NTFS_RECORD_HEADER *rhdr, size_t bytes);
581 int ntfs_fix_post_read(struct NTFS_RECORD_HEADER *rhdr, size_t bytes,
582 		       bool simple);
583 int ntfs_extend_init(struct ntfs_sb_info *sbi);
584 int ntfs_loadlog_and_replay(struct ntfs_inode *ni, struct ntfs_sb_info *sbi);
585 const struct ATTR_DEF_ENTRY *ntfs_query_def(struct ntfs_sb_info *sbi,
586 					    enum ATTR_TYPE Type);
587 int ntfs_look_for_free_space(struct ntfs_sb_info *sbi, CLST lcn, CLST len,
588 			     CLST *new_lcn, CLST *new_len,
589 			     enum ALLOCATE_OPT opt);
590 int ntfs_look_free_mft(struct ntfs_sb_info *sbi, CLST *rno, bool mft,
591 		       struct ntfs_inode *ni, struct mft_inode **mi);
592 void ntfs_mark_rec_free(struct ntfs_sb_info *sbi, CLST rno, bool is_mft);
593 int ntfs_clear_mft_tail(struct ntfs_sb_info *sbi, size_t from, size_t to);
594 int ntfs_refresh_zone(struct ntfs_sb_info *sbi);
595 void ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait);
596 void ntfs_bad_inode(struct inode *inode, const char *hint);
597 #define _ntfs_bad_inode(i) ntfs_bad_inode(i, __func__)
598 enum NTFS_DIRTY_FLAGS {
599 	NTFS_DIRTY_CLEAR = 0,
600 	NTFS_DIRTY_DIRTY = 1,
601 	NTFS_DIRTY_ERROR = 2,
602 };
603 int ntfs_set_state(struct ntfs_sb_info *sbi, enum NTFS_DIRTY_FLAGS dirty);
604 int ntfs_sb_read(struct super_block *sb, u64 lbo, size_t bytes, void *buffer);
605 int ntfs_sb_write(struct super_block *sb, u64 lbo, size_t bytes,
606 		  const void *buffer, int wait);
607 int ntfs_sb_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run,
608 		      u64 vbo, const void *buf, size_t bytes, int sync);
609 struct buffer_head *ntfs_bread_run(struct ntfs_sb_info *sbi,
610 				   const struct runs_tree *run, u64 vbo);
611 int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
612 		     u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb);
613 int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
614 		 struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
615 		 struct ntfs_buffers *nb);
616 int ntfs_get_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
617 		u32 bytes, struct ntfs_buffers *nb);
618 int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr,
619 		  struct ntfs_buffers *nb, int sync);
620 int ntfs_bio_pages(struct ntfs_sb_info *sbi, const struct runs_tree *run,
621 		   struct page **pages, u32 nr_pages, u64 vbo, u32 bytes,
622 		   enum req_op op);
623 int ntfs_bio_fill_1(struct ntfs_sb_info *sbi, const struct runs_tree *run);
624 int ntfs_vbo_to_lbo(struct ntfs_sb_info *sbi, const struct runs_tree *run,
625 		    u64 vbo, u64 *lbo, u64 *bytes);
626 struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST nRec,
627 				  bool dir);
628 extern const u8 s_default_security[0x50];
629 bool is_sd_valid(const struct SECURITY_DESCRIPTOR_RELATIVE *sd, u32 len);
630 int ntfs_security_init(struct ntfs_sb_info *sbi);
631 int ntfs_get_security_by_id(struct ntfs_sb_info *sbi, __le32 security_id,
632 			    struct SECURITY_DESCRIPTOR_RELATIVE **sd,
633 			    size_t *size);
634 int ntfs_insert_security(struct ntfs_sb_info *sbi,
635 			 const struct SECURITY_DESCRIPTOR_RELATIVE *sd,
636 			 u32 size, __le32 *security_id, bool *inserted);
637 int ntfs_reparse_init(struct ntfs_sb_info *sbi);
638 int ntfs_objid_init(struct ntfs_sb_info *sbi);
639 int ntfs_objid_remove(struct ntfs_sb_info *sbi, struct GUID *guid);
640 int ntfs_insert_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
641 			const struct MFT_REF *ref);
642 int ntfs_remove_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
643 			const struct MFT_REF *ref);
644 void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim);
645 int run_deallocate(struct ntfs_sb_info *sbi, struct runs_tree *run, bool trim);
646 
647 /* Globals from index.c */
648 int indx_used_bit(struct ntfs_index *indx, struct ntfs_inode *ni, size_t *bit);
649 void fnd_clear(struct ntfs_fnd *fnd);
fnd_get(void)650 static inline struct ntfs_fnd *fnd_get(void)
651 {
652 	return kzalloc(sizeof(struct ntfs_fnd), GFP_NOFS);
653 }
fnd_put(struct ntfs_fnd * fnd)654 static inline void fnd_put(struct ntfs_fnd *fnd)
655 {
656 	if (fnd) {
657 		fnd_clear(fnd);
658 		kfree(fnd);
659 	}
660 }
661 void indx_clear(struct ntfs_index *idx);
662 int indx_init(struct ntfs_index *indx, struct ntfs_sb_info *sbi,
663 	      const struct ATTRIB *attr, enum index_mutex_classed type);
664 struct INDEX_ROOT *indx_get_root(struct ntfs_index *indx, struct ntfs_inode *ni,
665 				 struct ATTRIB **attr, struct mft_inode **mi);
666 int indx_read(struct ntfs_index *idx, struct ntfs_inode *ni, CLST vbn,
667 	      struct indx_node **node);
668 int indx_find(struct ntfs_index *indx, struct ntfs_inode *dir,
669 	      const struct INDEX_ROOT *root, const void *Key, size_t KeyLen,
670 	      const void *param, int *diff, struct NTFS_DE **entry,
671 	      struct ntfs_fnd *fnd);
672 int indx_find_sort(struct ntfs_index *indx, struct ntfs_inode *ni,
673 		   const struct INDEX_ROOT *root, struct NTFS_DE **entry,
674 		   struct ntfs_fnd *fnd);
675 int indx_find_raw(struct ntfs_index *indx, struct ntfs_inode *ni,
676 		  const struct INDEX_ROOT *root, struct NTFS_DE **entry,
677 		  size_t *off, struct ntfs_fnd *fnd);
678 int indx_insert_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
679 		      const struct NTFS_DE *new_de, const void *param,
680 		      struct ntfs_fnd *fnd, bool undo);
681 int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
682 		      const void *key, u32 key_len, const void *param);
683 int indx_update_dup(struct ntfs_inode *ni, struct ntfs_sb_info *sbi,
684 		    const struct ATTR_FILE_NAME *fname,
685 		    const struct NTFS_DUP_INFO *dup, int sync);
686 
687 /* Globals from inode.c */
688 struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
689 			 const struct cpu_str *name);
690 int ntfs_set_size(struct inode *inode, u64 new_size);
691 int reset_log_file(struct inode *inode);
692 int ntfs_get_block(struct inode *inode, sector_t vbn,
693 		   struct buffer_head *bh_result, int create);
694 int ntfs_write_begin(struct file *file, struct address_space *mapping,
695 		     loff_t pos, u32 len, struct page **pagep, void **fsdata);
696 int ntfs_write_end(struct file *file, struct address_space *mapping,
697 		   loff_t pos, u32 len, u32 copied, struct page *page,
698 		   void *fsdata);
699 int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc);
700 int ntfs_sync_inode(struct inode *inode);
701 int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,
702 		      struct inode *i2);
703 int inode_write_data(struct inode *inode, const void *data, size_t bytes);
704 struct inode *ntfs_create_inode(struct user_namespace *mnt_userns,
705 				struct inode *dir, struct dentry *dentry,
706 				const struct cpu_str *uni, umode_t mode,
707 				dev_t dev, const char *symname, u32 size,
708 				struct ntfs_fnd *fnd);
709 int ntfs_link_inode(struct inode *inode, struct dentry *dentry);
710 int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry);
711 void ntfs_evict_inode(struct inode *inode);
712 extern const struct inode_operations ntfs_link_inode_operations;
713 extern const struct address_space_operations ntfs_aops;
714 extern const struct address_space_operations ntfs_aops_cmpr;
715 
716 /* Globals from name_i.c */
717 int fill_name_de(struct ntfs_sb_info *sbi, void *buf, const struct qstr *name,
718 		 const struct cpu_str *uni);
719 struct dentry *ntfs3_get_parent(struct dentry *child);
720 
721 extern const struct inode_operations ntfs_dir_inode_operations;
722 extern const struct inode_operations ntfs_special_inode_operations;
723 
724 /* Globals from record.c */
725 int mi_get(struct ntfs_sb_info *sbi, CLST rno, struct mft_inode **mi);
726 void mi_put(struct mft_inode *mi);
727 int mi_init(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno);
728 int mi_read(struct mft_inode *mi, bool is_mft);
729 struct ATTRIB *mi_enum_attr(struct mft_inode *mi, struct ATTRIB *attr);
730 // TODO: id?
731 struct ATTRIB *mi_find_attr(struct mft_inode *mi, struct ATTRIB *attr,
732 			    enum ATTR_TYPE type, const __le16 *name,
733 			    size_t name_len, const __le16 *id);
rec_find_attr_le(struct mft_inode * rec,struct ATTR_LIST_ENTRY * le)734 static inline struct ATTRIB *rec_find_attr_le(struct mft_inode *rec,
735 					      struct ATTR_LIST_ENTRY *le)
736 {
737 	return mi_find_attr(rec, NULL, le->type, le_name(le), le->name_len,
738 			    &le->id);
739 }
740 int mi_write(struct mft_inode *mi, int wait);
741 int mi_format_new(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno,
742 		  __le16 flags, bool is_mft);
743 struct ATTRIB *mi_insert_attr(struct mft_inode *mi, enum ATTR_TYPE type,
744 			      const __le16 *name, u8 name_len, u32 asize,
745 			      u16 name_off);
746 
747 bool mi_remove_attr(struct ntfs_inode *ni, struct mft_inode *mi,
748 		    struct ATTRIB *attr);
749 bool mi_resize_attr(struct mft_inode *mi, struct ATTRIB *attr, int bytes);
750 int mi_pack_runs(struct mft_inode *mi, struct ATTRIB *attr,
751 		 struct runs_tree *run, CLST len);
mi_is_ref(const struct mft_inode * mi,const struct MFT_REF * ref)752 static inline bool mi_is_ref(const struct mft_inode *mi,
753 			     const struct MFT_REF *ref)
754 {
755 	if (le32_to_cpu(ref->low) != mi->rno)
756 		return false;
757 	if (ref->seq != mi->mrec->seq)
758 		return false;
759 
760 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
761 	return le16_to_cpu(ref->high) == (mi->rno >> 32);
762 #else
763 	return !ref->high;
764 #endif
765 }
766 
mi_get_ref(const struct mft_inode * mi,struct MFT_REF * ref)767 static inline void mi_get_ref(const struct mft_inode *mi, struct MFT_REF *ref)
768 {
769 	ref->low = cpu_to_le32(mi->rno);
770 #ifdef CONFIG_NTFS3_64BIT_CLUSTER
771 	ref->high = cpu_to_le16(mi->rno >> 32);
772 #else
773 	ref->high = 0;
774 #endif
775 	ref->seq = mi->mrec->seq;
776 }
777 
778 /* Globals from run.c */
779 bool run_lookup_entry(const struct runs_tree *run, CLST vcn, CLST *lcn,
780 		      CLST *len, size_t *index);
781 void run_truncate(struct runs_tree *run, CLST vcn);
782 void run_truncate_head(struct runs_tree *run, CLST vcn);
783 void run_truncate_around(struct runs_tree *run, CLST vcn);
784 bool run_add_entry(struct runs_tree *run, CLST vcn, CLST lcn, CLST len,
785 		   bool is_mft);
786 bool run_collapse_range(struct runs_tree *run, CLST vcn, CLST len);
787 bool run_insert_range(struct runs_tree *run, CLST vcn, CLST len);
788 bool run_get_entry(const struct runs_tree *run, size_t index, CLST *vcn,
789 		   CLST *lcn, CLST *len);
790 bool run_is_mapped_full(const struct runs_tree *run, CLST svcn, CLST evcn);
791 
792 int run_pack(const struct runs_tree *run, CLST svcn, CLST len, u8 *run_buf,
793 	     u32 run_buf_size, CLST *packed_vcns);
794 int run_unpack(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
795 	       CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
796 	       u32 run_buf_size);
797 
798 #ifdef NTFS3_CHECK_FREE_CLST
799 int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
800 		  CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
801 		  u32 run_buf_size);
802 #else
803 #define run_unpack_ex run_unpack
804 #endif
805 int run_get_highest_vcn(CLST vcn, const u8 *run_buf, u64 *highest_vcn);
806 int run_clone(const struct runs_tree *run, struct runs_tree *new_run);
807 
808 /* Globals from super.c */
809 void *ntfs_set_shared(void *ptr, u32 bytes);
810 void *ntfs_put_shared(void *ptr);
811 void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len);
812 int ntfs_discard(struct ntfs_sb_info *sbi, CLST Lcn, CLST Len);
813 
814 /* Globals from bitmap.c*/
815 int __init ntfs3_init_bitmap(void);
816 void ntfs3_exit_bitmap(void);
817 void wnd_close(struct wnd_bitmap *wnd);
wnd_zeroes(const struct wnd_bitmap * wnd)818 static inline size_t wnd_zeroes(const struct wnd_bitmap *wnd)
819 {
820 	return wnd->total_zeroes;
821 }
822 int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits);
823 int wnd_set_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
824 int wnd_set_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
825 bool wnd_is_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
826 bool wnd_is_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
827 
828 /* Possible values for 'flags' 'wnd_find'. */
829 #define BITMAP_FIND_MARK_AS_USED 0x01
830 #define BITMAP_FIND_FULL 0x02
831 size_t wnd_find(struct wnd_bitmap *wnd, size_t to_alloc, size_t hint,
832 		size_t flags, size_t *allocated);
833 int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits);
834 void wnd_zone_set(struct wnd_bitmap *wnd, size_t Lcn, size_t Len);
835 int ntfs_trim_fs(struct ntfs_sb_info *sbi, struct fstrim_range *range);
836 
837 /* Globals from upcase.c */
838 int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2,
839 		   const u16 *upcase, bool bothcase);
840 int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
841 		       const u16 *upcase, bool bothcase);
842 
843 /* globals from xattr.c */
844 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
845 struct posix_acl *ntfs_get_acl(struct inode *inode, int type, bool rcu);
846 int ntfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
847 		 struct posix_acl *acl, int type);
848 int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
849 		  struct inode *dir);
850 #else
851 #define ntfs_get_acl NULL
852 #define ntfs_set_acl NULL
853 #endif
854 
855 int ntfs_acl_chmod(struct user_namespace *mnt_userns, struct inode *inode);
856 int ntfs_permission(struct user_namespace *mnt_userns, struct inode *inode,
857 		    int mask);
858 ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
859 extern const struct xattr_handler *ntfs_xattr_handlers[];
860 
861 int ntfs_save_wsl_perm(struct inode *inode);
862 void ntfs_get_wsl_perm(struct inode *inode);
863 
864 /* globals from lznt.c */
865 struct lznt *get_lznt_ctx(int level);
866 size_t compress_lznt(const void *uncompressed, size_t uncompressed_size,
867 		     void *compressed, size_t compressed_size,
868 		     struct lznt *ctx);
869 ssize_t decompress_lznt(const void *compressed, size_t compressed_size,
870 			void *uncompressed, size_t uncompressed_size);
871 
is_ntfs3(struct ntfs_sb_info * sbi)872 static inline bool is_ntfs3(struct ntfs_sb_info *sbi)
873 {
874 	return sbi->volume.major_ver >= 3;
875 }
876 
877 /* (sb->s_flags & SB_ACTIVE) */
is_mounted(struct ntfs_sb_info * sbi)878 static inline bool is_mounted(struct ntfs_sb_info *sbi)
879 {
880 	return !!sbi->sb->s_root;
881 }
882 
ntfs_is_meta_file(struct ntfs_sb_info * sbi,CLST rno)883 static inline bool ntfs_is_meta_file(struct ntfs_sb_info *sbi, CLST rno)
884 {
885 	return rno < MFT_REC_FREE || rno == sbi->objid_no ||
886 	       rno == sbi->quota_no || rno == sbi->reparse_no ||
887 	       rno == sbi->usn_jrnl_no;
888 }
889 
ntfs_unmap_page(struct page * page)890 static inline void ntfs_unmap_page(struct page *page)
891 {
892 	kunmap(page);
893 	put_page(page);
894 }
895 
ntfs_map_page(struct address_space * mapping,unsigned long index)896 static inline struct page *ntfs_map_page(struct address_space *mapping,
897 					 unsigned long index)
898 {
899 	struct page *page = read_mapping_page(mapping, index, NULL);
900 
901 	if (!IS_ERR(page))
902 		kmap(page);
903 	return page;
904 }
905 
wnd_zone_bit(const struct wnd_bitmap * wnd)906 static inline size_t wnd_zone_bit(const struct wnd_bitmap *wnd)
907 {
908 	return wnd->zone_bit;
909 }
910 
wnd_zone_len(const struct wnd_bitmap * wnd)911 static inline size_t wnd_zone_len(const struct wnd_bitmap *wnd)
912 {
913 	return wnd->zone_end - wnd->zone_bit;
914 }
915 
run_init(struct runs_tree * run)916 static inline void run_init(struct runs_tree *run)
917 {
918 	run->runs = NULL;
919 	run->count = 0;
920 	run->allocated = 0;
921 }
922 
run_alloc(void)923 static inline struct runs_tree *run_alloc(void)
924 {
925 	return kzalloc(sizeof(struct runs_tree), GFP_NOFS);
926 }
927 
run_close(struct runs_tree * run)928 static inline void run_close(struct runs_tree *run)
929 {
930 	kvfree(run->runs);
931 	memset(run, 0, sizeof(*run));
932 }
933 
run_free(struct runs_tree * run)934 static inline void run_free(struct runs_tree *run)
935 {
936 	if (run) {
937 		kvfree(run->runs);
938 		kfree(run);
939 	}
940 }
941 
run_is_empty(struct runs_tree * run)942 static inline bool run_is_empty(struct runs_tree *run)
943 {
944 	return !run->count;
945 }
946 
947 /* NTFS uses quad aligned bitmaps. */
bitmap_size(size_t bits)948 static inline size_t bitmap_size(size_t bits)
949 {
950 	return ALIGN((bits + 7) >> 3, 8);
951 }
952 
953 #define _100ns2seconds 10000000
954 #define SecondsToStartOf1970 0x00000002B6109100
955 
956 #define NTFS_TIME_GRAN 100
957 
958 /*
959  * kernel2nt - Converts in-memory kernel timestamp into nt time.
960  */
kernel2nt(const struct timespec64 * ts)961 static inline __le64 kernel2nt(const struct timespec64 *ts)
962 {
963 	// 10^7 units of 100 nanoseconds one second
964 	return cpu_to_le64(_100ns2seconds *
965 				   (ts->tv_sec + SecondsToStartOf1970) +
966 			   ts->tv_nsec / NTFS_TIME_GRAN);
967 }
968 
969 /*
970  * nt2kernel - Converts on-disk nt time into kernel timestamp.
971  */
nt2kernel(const __le64 tm,struct timespec64 * ts)972 static inline void nt2kernel(const __le64 tm, struct timespec64 *ts)
973 {
974 	u64 t = le64_to_cpu(tm) - _100ns2seconds * SecondsToStartOf1970;
975 
976 	// WARNING: do_div changes its first argument(!)
977 	ts->tv_nsec = do_div(t, _100ns2seconds) * 100;
978 	ts->tv_sec = t;
979 }
980 
ntfs_sb(struct super_block * sb)981 static inline struct ntfs_sb_info *ntfs_sb(struct super_block *sb)
982 {
983 	return sb->s_fs_info;
984 }
985 
986 /*
987  * ntfs_up_cluster - Align up on cluster boundary.
988  */
ntfs_up_cluster(const struct ntfs_sb_info * sbi,u64 size)989 static inline u64 ntfs_up_cluster(const struct ntfs_sb_info *sbi, u64 size)
990 {
991 	return (size + sbi->cluster_mask) & sbi->cluster_mask_inv;
992 }
993 
994 /*
995  * ntfs_up_block - Align up on cluster boundary.
996  */
ntfs_up_block(const struct super_block * sb,u64 size)997 static inline u64 ntfs_up_block(const struct super_block *sb, u64 size)
998 {
999 	return (size + sb->s_blocksize - 1) & ~(u64)(sb->s_blocksize - 1);
1000 }
1001 
bytes_to_cluster(const struct ntfs_sb_info * sbi,u64 size)1002 static inline CLST bytes_to_cluster(const struct ntfs_sb_info *sbi, u64 size)
1003 {
1004 	return (size + sbi->cluster_mask) >> sbi->cluster_bits;
1005 }
1006 
bytes_to_block(const struct super_block * sb,u64 size)1007 static inline u64 bytes_to_block(const struct super_block *sb, u64 size)
1008 {
1009 	return (size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1010 }
1011 
ntfs_bread(struct super_block * sb,sector_t block)1012 static inline struct buffer_head *ntfs_bread(struct super_block *sb,
1013 					     sector_t block)
1014 {
1015 	struct buffer_head *bh = sb_bread(sb, block);
1016 
1017 	if (bh)
1018 		return bh;
1019 
1020 	ntfs_err(sb, "failed to read volume at offset 0x%llx",
1021 		 (u64)block << sb->s_blocksize_bits);
1022 	return NULL;
1023 }
1024 
ntfs_i(struct inode * inode)1025 static inline struct ntfs_inode *ntfs_i(struct inode *inode)
1026 {
1027 	return container_of(inode, struct ntfs_inode, vfs_inode);
1028 }
1029 
is_compressed(const struct ntfs_inode * ni)1030 static inline bool is_compressed(const struct ntfs_inode *ni)
1031 {
1032 	return (ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) ||
1033 	       (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
1034 }
1035 
ni_ext_compress_bits(const struct ntfs_inode * ni)1036 static inline int ni_ext_compress_bits(const struct ntfs_inode *ni)
1037 {
1038 	return 0xb + (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
1039 }
1040 
1041 /* Bits - 0xc, 0xd, 0xe, 0xf, 0x10 */
ni_set_ext_compress_bits(struct ntfs_inode * ni,u8 bits)1042 static inline void ni_set_ext_compress_bits(struct ntfs_inode *ni, u8 bits)
1043 {
1044 	ni->ni_flags |= (bits - 0xb) & NI_FLAG_COMPRESSED_MASK;
1045 }
1046 
is_dedup(const struct ntfs_inode * ni)1047 static inline bool is_dedup(const struct ntfs_inode *ni)
1048 {
1049 	return ni->ni_flags & NI_FLAG_DEDUPLICATED;
1050 }
1051 
is_encrypted(const struct ntfs_inode * ni)1052 static inline bool is_encrypted(const struct ntfs_inode *ni)
1053 {
1054 	return ni->std_fa & FILE_ATTRIBUTE_ENCRYPTED;
1055 }
1056 
is_sparsed(const struct ntfs_inode * ni)1057 static inline bool is_sparsed(const struct ntfs_inode *ni)
1058 {
1059 	return ni->std_fa & FILE_ATTRIBUTE_SPARSE_FILE;
1060 }
1061 
is_resident(struct ntfs_inode * ni)1062 static inline int is_resident(struct ntfs_inode *ni)
1063 {
1064 	return ni->ni_flags & NI_FLAG_RESIDENT;
1065 }
1066 
le16_sub_cpu(__le16 * var,u16 val)1067 static inline void le16_sub_cpu(__le16 *var, u16 val)
1068 {
1069 	*var = cpu_to_le16(le16_to_cpu(*var) - val);
1070 }
1071 
le32_sub_cpu(__le32 * var,u32 val)1072 static inline void le32_sub_cpu(__le32 *var, u32 val)
1073 {
1074 	*var = cpu_to_le32(le32_to_cpu(*var) - val);
1075 }
1076 
nb_put(struct ntfs_buffers * nb)1077 static inline void nb_put(struct ntfs_buffers *nb)
1078 {
1079 	u32 i, nbufs = nb->nbufs;
1080 
1081 	if (!nbufs)
1082 		return;
1083 
1084 	for (i = 0; i < nbufs; i++)
1085 		put_bh(nb->bh[i]);
1086 	nb->nbufs = 0;
1087 }
1088 
put_indx_node(struct indx_node * in)1089 static inline void put_indx_node(struct indx_node *in)
1090 {
1091 	if (!in)
1092 		return;
1093 
1094 	kfree(in->index);
1095 	nb_put(&in->nb);
1096 	kfree(in);
1097 }
1098 
mi_clear(struct mft_inode * mi)1099 static inline void mi_clear(struct mft_inode *mi)
1100 {
1101 	nb_put(&mi->nb);
1102 	kfree(mi->mrec);
1103 	mi->mrec = NULL;
1104 }
1105 
ni_lock(struct ntfs_inode * ni)1106 static inline void ni_lock(struct ntfs_inode *ni)
1107 {
1108 	mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_NORMAL);
1109 }
1110 
ni_lock_dir(struct ntfs_inode * ni)1111 static inline void ni_lock_dir(struct ntfs_inode *ni)
1112 {
1113 	mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_PARENT);
1114 }
1115 
ni_unlock(struct ntfs_inode * ni)1116 static inline void ni_unlock(struct ntfs_inode *ni)
1117 {
1118 	mutex_unlock(&ni->ni_lock);
1119 }
1120 
ni_trylock(struct ntfs_inode * ni)1121 static inline int ni_trylock(struct ntfs_inode *ni)
1122 {
1123 	return mutex_trylock(&ni->ni_lock);
1124 }
1125 
attr_load_runs_attr(struct ntfs_inode * ni,struct ATTRIB * attr,struct runs_tree * run,CLST vcn)1126 static inline int attr_load_runs_attr(struct ntfs_inode *ni,
1127 				      struct ATTRIB *attr,
1128 				      struct runs_tree *run, CLST vcn)
1129 {
1130 	return attr_load_runs_vcn(ni, attr->type, attr_name(attr),
1131 				  attr->name_len, run, vcn);
1132 }
1133 
le64_sub_cpu(__le64 * var,u64 val)1134 static inline void le64_sub_cpu(__le64 *var, u64 val)
1135 {
1136 	*var = cpu_to_le64(le64_to_cpu(*var) - val);
1137 }
1138 
1139 #endif /* _LINUX_NTFS3_NTFS_FS_H */
1140