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 /* compatibility */
556 #define hfsp_mt2ut(t) (struct timespec64){ .tv_sec = __hfsp_mt2ut(t) }
557 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
558 #define hfsp_now2mt() __hfsp_ut2mt(ktime_get_real_seconds())
559
560 #endif
561