xref: /openbmc/linux/fs/hfsplus/hfsplus_fs.h (revision f04da10d)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *  linux/include/linux/hfsplus_fs.h
4  *
5  * Copyright (C) 1999
6  * Brad Boyer (flar@pants.nu)
7  * (C) 2003 Ardis Technologies <roman@ardistech.com>
8  *
9  */
10 
11 #ifndef _LINUX_HFSPLUS_FS_H
12 #define _LINUX_HFSPLUS_FS_H
13 
14 #ifdef pr_fmt
15 #undef pr_fmt
16 #endif
17 
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19 
20 #include <linux/fs.h>
21 #include <linux/mutex.h>
22 #include <linux/buffer_head.h>
23 #include <linux/blkdev.h>
24 #include "hfsplus_raw.h"
25 
26 #define DBG_BNODE_REFS	0x00000001
27 #define DBG_BNODE_MOD	0x00000002
28 #define DBG_CAT_MOD	0x00000004
29 #define DBG_INODE	0x00000008
30 #define DBG_SUPER	0x00000010
31 #define DBG_EXTENT	0x00000020
32 #define DBG_BITMAP	0x00000040
33 #define DBG_ATTR_MOD	0x00000080
34 
35 #if 0
36 #define DBG_MASK	(DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
37 #define DBG_MASK	(DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
38 #define DBG_MASK	(DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
39 #endif
40 #define DBG_MASK	(0)
41 
42 #define hfs_dbg(flg, fmt, ...)					\
43 do {								\
44 	if (DBG_##flg & DBG_MASK)				\
45 		printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
46 } while (0)
47 
48 #define hfs_dbg_cont(flg, fmt, ...)				\
49 do {								\
50 	if (DBG_##flg & DBG_MASK)				\
51 		pr_cont(fmt, ##__VA_ARGS__);			\
52 } while (0)
53 
54 /* Runtime config options */
55 #define HFSPLUS_DEF_CR_TYPE    0x3F3F3F3F  /* '????' */
56 
57 #define HFSPLUS_TYPE_DATA 0x00
58 #define HFSPLUS_TYPE_RSRC 0xFF
59 
60 typedef int (*btree_keycmp)(const hfsplus_btree_key *,
61 		const hfsplus_btree_key *);
62 
63 #define NODE_HASH_SIZE	256
64 
65 /* B-tree mutex nested subclasses */
66 enum hfsplus_btree_mutex_classes {
67 	CATALOG_BTREE_MUTEX,
68 	EXTENTS_BTREE_MUTEX,
69 	ATTR_BTREE_MUTEX,
70 };
71 
72 /* An HFS+ BTree held in memory */
73 struct hfs_btree {
74 	struct super_block *sb;
75 	struct inode *inode;
76 	btree_keycmp keycmp;
77 
78 	u32 cnid;
79 	u32 root;
80 	u32 leaf_count;
81 	u32 leaf_head;
82 	u32 leaf_tail;
83 	u32 node_count;
84 	u32 free_nodes;
85 	u32 attributes;
86 
87 	unsigned int node_size;
88 	unsigned int node_size_shift;
89 	unsigned int max_key_len;
90 	unsigned int depth;
91 
92 	struct mutex tree_lock;
93 
94 	unsigned int pages_per_bnode;
95 	spinlock_t hash_lock;
96 	struct hfs_bnode *node_hash[NODE_HASH_SIZE];
97 	int node_hash_cnt;
98 };
99 
100 struct page;
101 
102 /* An HFS+ BTree node in memory */
103 struct hfs_bnode {
104 	struct hfs_btree *tree;
105 
106 	u32 prev;
107 	u32 this;
108 	u32 next;
109 	u32 parent;
110 
111 	u16 num_recs;
112 	u8 type;
113 	u8 height;
114 
115 	struct hfs_bnode *next_hash;
116 	unsigned long flags;
117 	wait_queue_head_t lock_wq;
118 	atomic_t refcnt;
119 	unsigned int page_offset;
120 	struct page *page[];
121 };
122 
123 #define HFS_BNODE_LOCK		0
124 #define HFS_BNODE_ERROR		1
125 #define HFS_BNODE_NEW		2
126 #define HFS_BNODE_DIRTY		3
127 #define HFS_BNODE_DELETED	4
128 
129 /*
130  * Attributes file states
131  */
132 #define HFSPLUS_EMPTY_ATTR_TREE		0
133 #define HFSPLUS_CREATING_ATTR_TREE	1
134 #define HFSPLUS_VALID_ATTR_TREE		2
135 #define HFSPLUS_FAILED_ATTR_TREE	3
136 
137 /*
138  * HFS+ superblock info (built from Volume Header on disk)
139  */
140 
141 struct hfsplus_vh;
142 struct hfs_btree;
143 
144 struct hfsplus_sb_info {
145 	void *s_vhdr_buf;
146 	struct hfsplus_vh *s_vhdr;
147 	void *s_backup_vhdr_buf;
148 	struct hfsplus_vh *s_backup_vhdr;
149 	struct hfs_btree *ext_tree;
150 	struct hfs_btree *cat_tree;
151 	struct hfs_btree *attr_tree;
152 	atomic_t attr_tree_state;
153 	struct inode *alloc_file;
154 	struct inode *hidden_dir;
155 	struct nls_table *nls;
156 
157 	/* Runtime variables */
158 	u32 blockoffset;
159 	sector_t part_start;
160 	sector_t sect_count;
161 	int fs_shift;
162 
163 	/* immutable data from the volume header */
164 	u32 alloc_blksz;
165 	int alloc_blksz_shift;
166 	u32 total_blocks;
167 	u32 data_clump_blocks, rsrc_clump_blocks;
168 
169 	/* mutable data from the volume header, protected by alloc_mutex */
170 	u32 free_blocks;
171 	struct mutex alloc_mutex;
172 
173 	/* mutable data from the volume header, protected by vh_mutex */
174 	u32 next_cnid;
175 	u32 file_count;
176 	u32 folder_count;
177 	struct mutex vh_mutex;
178 
179 	/* Config options */
180 	u32 creator;
181 	u32 type;
182 
183 	umode_t umask;
184 	kuid_t uid;
185 	kgid_t gid;
186 
187 	int part, session;
188 	unsigned long flags;
189 
190 	int work_queued;               /* non-zero delayed work is queued */
191 	struct delayed_work sync_work; /* FS sync delayed work */
192 	spinlock_t work_lock;          /* protects sync_work and work_queued */
193 };
194 
195 #define HFSPLUS_SB_WRITEBACKUP	0
196 #define HFSPLUS_SB_NODECOMPOSE	1
197 #define HFSPLUS_SB_FORCE	2
198 #define HFSPLUS_SB_HFSX		3
199 #define HFSPLUS_SB_CASEFOLD	4
200 #define HFSPLUS_SB_NOBARRIER	5
201 #define HFSPLUS_SB_UID		6
202 #define HFSPLUS_SB_GID		7
203 
HFSPLUS_SB(struct super_block * sb)204 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
205 {
206 	return sb->s_fs_info;
207 }
208 
209 
210 struct hfsplus_inode_info {
211 	atomic_t opencnt;
212 
213 	/*
214 	 * Extent allocation information, protected by extents_lock.
215 	 */
216 	u32 first_blocks;
217 	u32 clump_blocks;
218 	u32 alloc_blocks;
219 	u32 cached_start;
220 	u32 cached_blocks;
221 	hfsplus_extent_rec first_extents;
222 	hfsplus_extent_rec cached_extents;
223 	unsigned int extent_state;
224 	struct mutex extents_lock;
225 
226 	/*
227 	 * Immutable data.
228 	 */
229 	struct inode *rsrc_inode;
230 	__be32 create_date;
231 
232 	/*
233 	 * Protected by sbi->vh_mutex.
234 	 */
235 	u32 linkid;
236 
237 	/*
238 	 * Accessed using atomic bitops.
239 	 */
240 	unsigned long flags;
241 
242 	/*
243 	 * Protected by i_mutex.
244 	 */
245 	sector_t fs_blocks;
246 	u8 userflags;		/* BSD user file flags */
247 	u32 subfolders;		/* Subfolder count (HFSX only) */
248 	struct list_head open_dir_list;
249 	spinlock_t open_dir_lock;
250 	loff_t phys_size;
251 
252 	struct inode vfs_inode;
253 };
254 
255 #define HFSPLUS_EXT_DIRTY	0x0001
256 #define HFSPLUS_EXT_NEW		0x0002
257 
258 #define HFSPLUS_I_RSRC		0	/* represents a resource fork */
259 #define HFSPLUS_I_CAT_DIRTY	1	/* has changes in the catalog tree */
260 #define HFSPLUS_I_EXT_DIRTY	2	/* has changes in the extent tree */
261 #define HFSPLUS_I_ALLOC_DIRTY	3	/* has changes in the allocation file */
262 #define HFSPLUS_I_ATTR_DIRTY	4	/* has changes in the attributes tree */
263 
264 #define HFSPLUS_IS_RSRC(inode) \
265 	test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)
266 
HFSPLUS_I(struct inode * inode)267 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
268 {
269 	return container_of(inode, struct hfsplus_inode_info, vfs_inode);
270 }
271 
272 /*
273  * Mark an inode dirty, and also mark the btree in which the
274  * specific type of metadata is stored.
275  * For data or metadata that gets written back by into the catalog btree
276  * by hfsplus_write_inode a plain mark_inode_dirty call is enough.
277  */
hfsplus_mark_inode_dirty(struct inode * inode,unsigned int flag)278 static inline void hfsplus_mark_inode_dirty(struct inode *inode,
279 		unsigned int flag)
280 {
281 	set_bit(flag, &HFSPLUS_I(inode)->flags);
282 	mark_inode_dirty(inode);
283 }
284 
285 struct hfs_find_data {
286 	/* filled by caller */
287 	hfsplus_btree_key *search_key;
288 	hfsplus_btree_key *key;
289 	/* filled by find */
290 	struct hfs_btree *tree;
291 	struct hfs_bnode *bnode;
292 	/* filled by findrec */
293 	int record;
294 	int keyoffset, keylength;
295 	int entryoffset, entrylength;
296 };
297 
298 struct hfsplus_readdir_data {
299 	struct list_head list;
300 	struct file *file;
301 	struct hfsplus_cat_key key;
302 };
303 
304 /*
305  * Find minimum acceptible I/O size for an hfsplus sb.
306  */
hfsplus_min_io_size(struct super_block * sb)307 static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
308 {
309 	return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev),
310 		     HFSPLUS_SECTOR_SIZE);
311 }
312 
313 #define hfs_btree_open hfsplus_btree_open
314 #define hfs_btree_close hfsplus_btree_close
315 #define hfs_btree_write hfsplus_btree_write
316 #define hfs_bmap_reserve hfsplus_bmap_reserve
317 #define hfs_bmap_alloc hfsplus_bmap_alloc
318 #define hfs_bmap_free hfsplus_bmap_free
319 #define hfs_bnode_read hfsplus_bnode_read
320 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16
321 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8
322 #define hfs_bnode_read_key hfsplus_bnode_read_key
323 #define hfs_bnode_write hfsplus_bnode_write
324 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16
325 #define hfs_bnode_clear hfsplus_bnode_clear
326 #define hfs_bnode_copy hfsplus_bnode_copy
327 #define hfs_bnode_move hfsplus_bnode_move
328 #define hfs_bnode_dump hfsplus_bnode_dump
329 #define hfs_bnode_unlink hfsplus_bnode_unlink
330 #define hfs_bnode_findhash hfsplus_bnode_findhash
331 #define hfs_bnode_find hfsplus_bnode_find
332 #define hfs_bnode_unhash hfsplus_bnode_unhash
333 #define hfs_bnode_free hfsplus_bnode_free
334 #define hfs_bnode_create hfsplus_bnode_create
335 #define hfs_bnode_get hfsplus_bnode_get
336 #define hfs_bnode_put hfsplus_bnode_put
337 #define hfs_brec_lenoff hfsplus_brec_lenoff
338 #define hfs_brec_keylen hfsplus_brec_keylen
339 #define hfs_brec_insert hfsplus_brec_insert
340 #define hfs_brec_remove hfsplus_brec_remove
341 #define hfs_find_init hfsplus_find_init
342 #define hfs_find_exit hfsplus_find_exit
343 #define __hfs_brec_find __hfsplus_brec_find
344 #define hfs_brec_find hfsplus_brec_find
345 #define hfs_brec_read hfsplus_brec_read
346 #define hfs_brec_goto hfsplus_brec_goto
347 #define hfs_part_find hfsplus_part_find
348 
349 /*
350  * hfs+-specific ioctl for making the filesystem bootable
351  */
352 #define HFSPLUS_IOC_BLESS _IO('h', 0x80)
353 
354 typedef int (*search_strategy_t)(struct hfs_bnode *,
355 				struct hfs_find_data *,
356 				int *, int *, int *);
357 
358 /*
359  * Functions in any *.c used in other files
360  */
361 
362 /* attributes.c */
363 int __init hfsplus_create_attr_tree_cache(void);
364 void hfsplus_destroy_attr_tree_cache(void);
365 int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *k1,
366 			     const hfsplus_btree_key *k2);
367 int hfsplus_attr_build_key(struct super_block *sb, hfsplus_btree_key *key,
368 			   u32 cnid, const char *name);
369 hfsplus_attr_entry *hfsplus_alloc_attr_entry(void);
370 void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry);
371 int hfsplus_find_attr(struct super_block *sb, u32 cnid, const char *name,
372 		      struct hfs_find_data *fd);
373 int hfsplus_attr_exists(struct inode *inode, const char *name);
374 int hfsplus_create_attr(struct inode *inode, const char *name,
375 			const void *value, size_t size);
376 int hfsplus_delete_attr(struct inode *inode, const char *name);
377 int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid);
378 
379 /* bitmap.c */
380 int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset,
381 			   u32 *max);
382 int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count);
383 
384 /* btree.c */
385 u32 hfsplus_calc_btree_clump_size(u32 block_size, u32 node_size, u64 sectors,
386 				  int file_id);
387 struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id);
388 void hfs_btree_close(struct hfs_btree *tree);
389 int hfs_btree_write(struct hfs_btree *tree);
390 int hfs_bmap_reserve(struct hfs_btree *tree, int rsvd_nodes);
391 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree);
392 void hfs_bmap_free(struct hfs_bnode *node);
393 
394 /* bnode.c */
395 void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len);
396 u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off);
397 u8 hfs_bnode_read_u8(struct hfs_bnode *node, int off);
398 void hfs_bnode_read_key(struct hfs_bnode *node, void *key, int off);
399 void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len);
400 void hfs_bnode_write_u16(struct hfs_bnode *node, int off, u16 data);
401 void hfs_bnode_clear(struct hfs_bnode *node, int off, int len);
402 void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
403 		    struct hfs_bnode *src_node, int src, int len);
404 void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len);
405 void hfs_bnode_dump(struct hfs_bnode *node);
406 void hfs_bnode_unlink(struct hfs_bnode *node);
407 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *tree, u32 cnid);
408 void hfs_bnode_unhash(struct hfs_bnode *node);
409 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num);
410 void hfs_bnode_free(struct hfs_bnode *node);
411 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num);
412 void hfs_bnode_get(struct hfs_bnode *node);
413 void hfs_bnode_put(struct hfs_bnode *node);
414 bool hfs_bnode_need_zeroout(struct hfs_btree *tree);
415 
416 /* brec.c */
417 u16 hfs_brec_lenoff(struct hfs_bnode *node, u16 rec, u16 *off);
418 u16 hfs_brec_keylen(struct hfs_bnode *node, u16 rec);
419 int hfs_brec_insert(struct hfs_find_data *fd, void *entry, int entry_len);
420 int hfs_brec_remove(struct hfs_find_data *fd);
421 
422 /* bfind.c */
423 int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd);
424 void hfs_find_exit(struct hfs_find_data *fd);
425 int hfs_find_1st_rec_by_cnid(struct hfs_bnode *bnode, struct hfs_find_data *fd,
426 			     int *begin, int *end, int *cur_rec);
427 int hfs_find_rec_by_key(struct hfs_bnode *bnode, struct hfs_find_data *fd,
428 			int *begin, int *end, int *cur_rec);
429 int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd,
430 		    search_strategy_t rec_found);
431 int hfs_brec_find(struct hfs_find_data *fd, search_strategy_t do_key_compare);
432 int hfs_brec_read(struct hfs_find_data *fd, void *rec, int rec_len);
433 int hfs_brec_goto(struct hfs_find_data *fd, int cnt);
434 
435 /* catalog.c */
436 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1,
437 			     const hfsplus_btree_key *k2);
438 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1,
439 			    const hfsplus_btree_key *k2);
440 int hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key,
441 			   u32 parent, const struct qstr *str);
442 void hfsplus_cat_build_key_with_cnid(struct super_block *sb,
443 				     hfsplus_btree_key *key, u32 parent);
444 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms);
445 int hfsplus_find_cat(struct super_block *sb, u32 cnid,
446 		     struct hfs_find_data *fd);
447 int hfsplus_create_cat(u32 cnid, struct inode *dir, const struct qstr *str,
448 		       struct inode *inode);
449 int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str);
450 int hfsplus_rename_cat(u32 cnid, struct inode *src_dir, const struct qstr *src_name,
451 		       struct inode *dst_dir, const struct qstr *dst_name);
452 
453 /* dir.c */
454 extern const struct inode_operations hfsplus_dir_inode_operations;
455 extern const struct file_operations hfsplus_dir_operations;
456 
457 /* extents.c */
458 int hfsplus_ext_cmp_key(const hfsplus_btree_key *k1,
459 			const hfsplus_btree_key *k2);
460 int hfsplus_ext_write_extent(struct inode *inode);
461 int hfsplus_get_block(struct inode *inode, sector_t iblock,
462 		      struct buffer_head *bh_result, int create);
463 int hfsplus_free_fork(struct super_block *sb, u32 cnid,
464 		      struct hfsplus_fork_raw *fork, int type);
465 int hfsplus_file_extend(struct inode *inode, bool zeroout);
466 void hfsplus_file_truncate(struct inode *inode);
467 
468 /* inode.c */
469 extern const struct address_space_operations hfsplus_aops;
470 extern const struct address_space_operations hfsplus_btree_aops;
471 extern const struct dentry_operations hfsplus_dentry_operations;
472 
473 int hfsplus_write_begin(struct file *file, struct address_space *mapping,
474 		loff_t pos, unsigned len, struct page **pagep, void **fsdata);
475 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir,
476 				umode_t mode);
477 void hfsplus_delete_inode(struct inode *inode);
478 void hfsplus_inode_read_fork(struct inode *inode,
479 			     struct hfsplus_fork_raw *fork);
480 void hfsplus_inode_write_fork(struct inode *inode,
481 			      struct hfsplus_fork_raw *fork);
482 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd);
483 int hfsplus_cat_write_inode(struct inode *inode);
484 int hfsplus_getattr(struct mnt_idmap *idmap, const struct path *path,
485 		    struct kstat *stat, u32 request_mask,
486 		    unsigned int query_flags);
487 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
488 		       int datasync);
489 int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa);
490 int hfsplus_fileattr_set(struct mnt_idmap *idmap,
491 			 struct dentry *dentry, struct fileattr *fa);
492 
493 /* ioctl.c */
494 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
495 
496 /* options.c */
497 void hfsplus_fill_defaults(struct hfsplus_sb_info *opts);
498 int hfsplus_parse_options_remount(char *input, int *force);
499 int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi);
500 int hfsplus_show_options(struct seq_file *seq, struct dentry *root);
501 
502 /* part_tbl.c */
503 int hfs_part_find(struct super_block *sb, sector_t *part_start,
504 		  sector_t *part_size);
505 
506 /* super.c */
507 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino);
508 void hfsplus_mark_mdb_dirty(struct super_block *sb);
509 
510 /* tables.c */
511 extern u16 hfsplus_case_fold_table[];
512 extern u16 hfsplus_decompose_table[];
513 extern u16 hfsplus_compose_table[];
514 
515 /* unicode.c */
516 int hfsplus_strcasecmp(const struct hfsplus_unistr *s1,
517 		       const struct hfsplus_unistr *s2);
518 int hfsplus_strcmp(const struct hfsplus_unistr *s1,
519 		   const struct hfsplus_unistr *s2);
520 int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr,
521 		    char *astr, int *len_p);
522 int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
523 		    int max_unistr_len, const char *astr, int len);
524 int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str);
525 int hfsplus_compare_dentry(const struct dentry *dentry, unsigned int len,
526 			   const char *str, const struct qstr *name);
527 
528 /* wrapper.c */
529 int hfsplus_submit_bio(struct super_block *sb, sector_t sector, void *buf,
530 		       void **data, blk_opf_t opf);
531 int hfsplus_read_wrapper(struct super_block *sb);
532 
533 /*
534  * time helpers: convert between 1904-base and 1970-base timestamps
535  *
536  * HFS+ implementations are highly inconsistent, this one matches the
537  * traditional behavior of 64-bit Linux, giving the most useful
538  * time range between 1970 and 2106, by treating any on-disk timestamp
539  * under HFSPLUS_UTC_OFFSET (Jan 1 1970) as a time between 2040 and 2106.
540  */
541 #define HFSPLUS_UTC_OFFSET 2082844800U
542 
__hfsp_mt2ut(__be32 mt)543 static inline time64_t __hfsp_mt2ut(__be32 mt)
544 {
545 	time64_t ut = (u32)(be32_to_cpu(mt) - HFSPLUS_UTC_OFFSET);
546 
547 	return ut;
548 }
549 
__hfsp_ut2mt(time64_t ut)550 static inline __be32 __hfsp_ut2mt(time64_t ut)
551 {
552 	return cpu_to_be32(lower_32_bits(ut) + HFSPLUS_UTC_OFFSET);
553 }
554 
555 static inline enum hfsplus_btree_mutex_classes
hfsplus_btree_lock_class(struct hfs_btree * tree)556 hfsplus_btree_lock_class(struct hfs_btree *tree)
557 {
558 	enum hfsplus_btree_mutex_classes class;
559 
560 	switch (tree->cnid) {
561 	case HFSPLUS_CAT_CNID:
562 		class = CATALOG_BTREE_MUTEX;
563 		break;
564 	case HFSPLUS_EXT_CNID:
565 		class = EXTENTS_BTREE_MUTEX;
566 		break;
567 	case HFSPLUS_ATTR_CNID:
568 		class = ATTR_BTREE_MUTEX;
569 		break;
570 	default:
571 		BUG();
572 	}
573 	return class;
574 }
575 
576 /* compatibility */
577 #define hfsp_mt2ut(t)		(struct timespec64){ .tv_sec = __hfsp_mt2ut(t) }
578 #define hfsp_ut2mt(t)		__hfsp_ut2mt((t).tv_sec)
579 #define hfsp_now2mt()		__hfsp_ut2mt(ktime_get_real_seconds())
580 
581 #endif
582