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 struct rcu_head rcu; 194 }; 195 196 #define HFSPLUS_SB_WRITEBACKUP 0 197 #define HFSPLUS_SB_NODECOMPOSE 1 198 #define HFSPLUS_SB_FORCE 2 199 #define HFSPLUS_SB_HFSX 3 200 #define HFSPLUS_SB_CASEFOLD 4 201 #define HFSPLUS_SB_NOBARRIER 5 202 #define HFSPLUS_SB_UID 6 203 #define HFSPLUS_SB_GID 7 204 205 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb) 206 { 207 return sb->s_fs_info; 208 } 209 210 211 struct hfsplus_inode_info { 212 atomic_t opencnt; 213 214 /* 215 * Extent allocation information, protected by extents_lock. 216 */ 217 u32 first_blocks; 218 u32 clump_blocks; 219 u32 alloc_blocks; 220 u32 cached_start; 221 u32 cached_blocks; 222 hfsplus_extent_rec first_extents; 223 hfsplus_extent_rec cached_extents; 224 unsigned int extent_state; 225 struct mutex extents_lock; 226 227 /* 228 * Immutable data. 229 */ 230 struct inode *rsrc_inode; 231 __be32 create_date; 232 233 /* 234 * Protected by sbi->vh_mutex. 235 */ 236 u32 linkid; 237 238 /* 239 * Accessed using atomic bitops. 240 */ 241 unsigned long flags; 242 243 /* 244 * Protected by i_mutex. 245 */ 246 sector_t fs_blocks; 247 u8 userflags; /* BSD user file flags */ 248 u32 subfolders; /* Subfolder count (HFSX only) */ 249 struct list_head open_dir_list; 250 spinlock_t open_dir_lock; 251 loff_t phys_size; 252 253 struct inode vfs_inode; 254 }; 255 256 #define HFSPLUS_EXT_DIRTY 0x0001 257 #define HFSPLUS_EXT_NEW 0x0002 258 259 #define HFSPLUS_I_RSRC 0 /* represents a resource fork */ 260 #define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */ 261 #define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */ 262 #define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */ 263 #define HFSPLUS_I_ATTR_DIRTY 4 /* has changes in the attributes tree */ 264 265 #define HFSPLUS_IS_RSRC(inode) \ 266 test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags) 267 268 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) 269 { 270 return container_of(inode, struct hfsplus_inode_info, vfs_inode); 271 } 272 273 /* 274 * Mark an inode dirty, and also mark the btree in which the 275 * specific type of metadata is stored. 276 * For data or metadata that gets written back by into the catalog btree 277 * by hfsplus_write_inode a plain mark_inode_dirty call is enough. 278 */ 279 static inline void hfsplus_mark_inode_dirty(struct inode *inode, 280 unsigned int flag) 281 { 282 set_bit(flag, &HFSPLUS_I(inode)->flags); 283 mark_inode_dirty(inode); 284 } 285 286 struct hfs_find_data { 287 /* filled by caller */ 288 hfsplus_btree_key *search_key; 289 hfsplus_btree_key *key; 290 /* filled by find */ 291 struct hfs_btree *tree; 292 struct hfs_bnode *bnode; 293 /* filled by findrec */ 294 int record; 295 int keyoffset, keylength; 296 int entryoffset, entrylength; 297 }; 298 299 struct hfsplus_readdir_data { 300 struct list_head list; 301 struct file *file; 302 struct hfsplus_cat_key key; 303 }; 304 305 /* 306 * Find minimum acceptible I/O size for an hfsplus sb. 307 */ 308 static inline unsigned short hfsplus_min_io_size(struct super_block *sb) 309 { 310 return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev), 311 HFSPLUS_SECTOR_SIZE); 312 } 313 314 #define hfs_btree_open hfsplus_btree_open 315 #define hfs_btree_close hfsplus_btree_close 316 #define hfs_btree_write hfsplus_btree_write 317 #define hfs_bmap_reserve hfsplus_bmap_reserve 318 #define hfs_bmap_alloc hfsplus_bmap_alloc 319 #define hfs_bmap_free hfsplus_bmap_free 320 #define hfs_bnode_read hfsplus_bnode_read 321 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16 322 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8 323 #define hfs_bnode_read_key hfsplus_bnode_read_key 324 #define hfs_bnode_write hfsplus_bnode_write 325 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16 326 #define hfs_bnode_clear hfsplus_bnode_clear 327 #define hfs_bnode_copy hfsplus_bnode_copy 328 #define hfs_bnode_move hfsplus_bnode_move 329 #define hfs_bnode_dump hfsplus_bnode_dump 330 #define hfs_bnode_unlink hfsplus_bnode_unlink 331 #define hfs_bnode_findhash hfsplus_bnode_findhash 332 #define hfs_bnode_find hfsplus_bnode_find 333 #define hfs_bnode_unhash hfsplus_bnode_unhash 334 #define hfs_bnode_free hfsplus_bnode_free 335 #define hfs_bnode_create hfsplus_bnode_create 336 #define hfs_bnode_get hfsplus_bnode_get 337 #define hfs_bnode_put hfsplus_bnode_put 338 #define hfs_brec_lenoff hfsplus_brec_lenoff 339 #define hfs_brec_keylen hfsplus_brec_keylen 340 #define hfs_brec_insert hfsplus_brec_insert 341 #define hfs_brec_remove hfsplus_brec_remove 342 #define hfs_find_init hfsplus_find_init 343 #define hfs_find_exit hfsplus_find_exit 344 #define __hfs_brec_find __hfsplus_brec_find 345 #define hfs_brec_find hfsplus_brec_find 346 #define hfs_brec_read hfsplus_brec_read 347 #define hfs_brec_goto hfsplus_brec_goto 348 #define hfs_part_find hfsplus_part_find 349 350 /* 351 * hfs+-specific ioctl for making the filesystem bootable 352 */ 353 #define HFSPLUS_IOC_BLESS _IO('h', 0x80) 354 355 typedef int (*search_strategy_t)(struct hfs_bnode *, 356 struct hfs_find_data *, 357 int *, int *, int *); 358 359 /* 360 * Functions in any *.c used in other files 361 */ 362 363 /* attributes.c */ 364 int __init hfsplus_create_attr_tree_cache(void); 365 void hfsplus_destroy_attr_tree_cache(void); 366 int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *k1, 367 const hfsplus_btree_key *k2); 368 int hfsplus_attr_build_key(struct super_block *sb, hfsplus_btree_key *key, 369 u32 cnid, const char *name); 370 hfsplus_attr_entry *hfsplus_alloc_attr_entry(void); 371 void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry); 372 int hfsplus_find_attr(struct super_block *sb, u32 cnid, const char *name, 373 struct hfs_find_data *fd); 374 int hfsplus_attr_exists(struct inode *inode, const char *name); 375 int hfsplus_create_attr(struct inode *inode, const char *name, 376 const void *value, size_t size); 377 int hfsplus_delete_attr(struct inode *inode, const char *name); 378 int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid); 379 380 /* bitmap.c */ 381 int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, 382 u32 *max); 383 int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count); 384 385 /* btree.c */ 386 u32 hfsplus_calc_btree_clump_size(u32 block_size, u32 node_size, u64 sectors, 387 int file_id); 388 struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id); 389 void hfs_btree_close(struct hfs_btree *tree); 390 int hfs_btree_write(struct hfs_btree *tree); 391 int hfs_bmap_reserve(struct hfs_btree *tree, int rsvd_nodes); 392 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree); 393 void hfs_bmap_free(struct hfs_bnode *node); 394 395 /* bnode.c */ 396 void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len); 397 u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off); 398 u8 hfs_bnode_read_u8(struct hfs_bnode *node, int off); 399 void hfs_bnode_read_key(struct hfs_bnode *node, void *key, int off); 400 void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len); 401 void hfs_bnode_write_u16(struct hfs_bnode *node, int off, u16 data); 402 void hfs_bnode_clear(struct hfs_bnode *node, int off, int len); 403 void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst, 404 struct hfs_bnode *src_node, int src, int len); 405 void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len); 406 void hfs_bnode_dump(struct hfs_bnode *node); 407 void hfs_bnode_unlink(struct hfs_bnode *node); 408 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *tree, u32 cnid); 409 void hfs_bnode_unhash(struct hfs_bnode *node); 410 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num); 411 void hfs_bnode_free(struct hfs_bnode *node); 412 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num); 413 void hfs_bnode_get(struct hfs_bnode *node); 414 void hfs_bnode_put(struct hfs_bnode *node); 415 bool hfs_bnode_need_zeroout(struct hfs_btree *tree); 416 417 /* brec.c */ 418 u16 hfs_brec_lenoff(struct hfs_bnode *node, u16 rec, u16 *off); 419 u16 hfs_brec_keylen(struct hfs_bnode *node, u16 rec); 420 int hfs_brec_insert(struct hfs_find_data *fd, void *entry, int entry_len); 421 int hfs_brec_remove(struct hfs_find_data *fd); 422 423 /* bfind.c */ 424 int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd); 425 void hfs_find_exit(struct hfs_find_data *fd); 426 int hfs_find_1st_rec_by_cnid(struct hfs_bnode *bnode, struct hfs_find_data *fd, 427 int *begin, int *end, int *cur_rec); 428 int hfs_find_rec_by_key(struct hfs_bnode *bnode, struct hfs_find_data *fd, 429 int *begin, int *end, int *cur_rec); 430 int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd, 431 search_strategy_t rec_found); 432 int hfs_brec_find(struct hfs_find_data *fd, search_strategy_t do_key_compare); 433 int hfs_brec_read(struct hfs_find_data *fd, void *rec, int rec_len); 434 int hfs_brec_goto(struct hfs_find_data *fd, int cnt); 435 436 /* catalog.c */ 437 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1, 438 const hfsplus_btree_key *k2); 439 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1, 440 const hfsplus_btree_key *k2); 441 int hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key, 442 u32 parent, const struct qstr *str); 443 void hfsplus_cat_build_key_with_cnid(struct super_block *sb, 444 hfsplus_btree_key *key, u32 parent); 445 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms); 446 int hfsplus_find_cat(struct super_block *sb, u32 cnid, 447 struct hfs_find_data *fd); 448 int hfsplus_create_cat(u32 cnid, struct inode *dir, const struct qstr *str, 449 struct inode *inode); 450 int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str); 451 int hfsplus_rename_cat(u32 cnid, struct inode *src_dir, const struct qstr *src_name, 452 struct inode *dst_dir, const struct qstr *dst_name); 453 454 /* dir.c */ 455 extern const struct inode_operations hfsplus_dir_inode_operations; 456 extern const struct file_operations hfsplus_dir_operations; 457 458 /* extents.c */ 459 int hfsplus_ext_cmp_key(const hfsplus_btree_key *k1, 460 const hfsplus_btree_key *k2); 461 int hfsplus_ext_write_extent(struct inode *inode); 462 int hfsplus_get_block(struct inode *inode, sector_t iblock, 463 struct buffer_head *bh_result, int create); 464 int hfsplus_free_fork(struct super_block *sb, u32 cnid, 465 struct hfsplus_fork_raw *fork, int type); 466 int hfsplus_file_extend(struct inode *inode, bool zeroout); 467 void hfsplus_file_truncate(struct inode *inode); 468 469 /* inode.c */ 470 extern const struct address_space_operations hfsplus_aops; 471 extern const struct address_space_operations hfsplus_btree_aops; 472 extern const struct dentry_operations hfsplus_dentry_operations; 473 474 int hfsplus_write_begin(struct file *file, struct address_space *mapping, 475 loff_t pos, unsigned len, struct page **pagep, void **fsdata); 476 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir, 477 umode_t mode); 478 void hfsplus_delete_inode(struct inode *inode); 479 void hfsplus_inode_read_fork(struct inode *inode, 480 struct hfsplus_fork_raw *fork); 481 void hfsplus_inode_write_fork(struct inode *inode, 482 struct hfsplus_fork_raw *fork); 483 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd); 484 int hfsplus_cat_write_inode(struct inode *inode); 485 int hfsplus_getattr(struct mnt_idmap *idmap, const struct path *path, 486 struct kstat *stat, u32 request_mask, 487 unsigned int query_flags); 488 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, 489 int datasync); 490 int hfsplus_fileattr_get(struct dentry *dentry, struct fileattr *fa); 491 int hfsplus_fileattr_set(struct mnt_idmap *idmap, 492 struct dentry *dentry, struct fileattr *fa); 493 494 /* ioctl.c */ 495 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 496 497 /* options.c */ 498 void hfsplus_fill_defaults(struct hfsplus_sb_info *opts); 499 int hfsplus_parse_options_remount(char *input, int *force); 500 int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi); 501 int hfsplus_show_options(struct seq_file *seq, struct dentry *root); 502 503 /* part_tbl.c */ 504 int hfs_part_find(struct super_block *sb, sector_t *part_start, 505 sector_t *part_size); 506 507 /* super.c */ 508 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino); 509 void hfsplus_mark_mdb_dirty(struct super_block *sb); 510 511 /* tables.c */ 512 extern u16 hfsplus_case_fold_table[]; 513 extern u16 hfsplus_decompose_table[]; 514 extern u16 hfsplus_compose_table[]; 515 516 /* unicode.c */ 517 int hfsplus_strcasecmp(const struct hfsplus_unistr *s1, 518 const struct hfsplus_unistr *s2); 519 int hfsplus_strcmp(const struct hfsplus_unistr *s1, 520 const struct hfsplus_unistr *s2); 521 int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr, 522 char *astr, int *len_p); 523 int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr, 524 int max_unistr_len, const char *astr, int len); 525 int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str); 526 int hfsplus_compare_dentry(const struct dentry *dentry, unsigned int len, 527 const char *str, const struct qstr *name); 528 529 /* wrapper.c */ 530 int hfsplus_submit_bio(struct super_block *sb, sector_t sector, void *buf, 531 void **data, blk_opf_t opf); 532 int hfsplus_read_wrapper(struct super_block *sb); 533 534 /* 535 * time helpers: convert between 1904-base and 1970-base timestamps 536 * 537 * HFS+ implementations are highly inconsistent, this one matches the 538 * traditional behavior of 64-bit Linux, giving the most useful 539 * time range between 1970 and 2106, by treating any on-disk timestamp 540 * under HFSPLUS_UTC_OFFSET (Jan 1 1970) as a time between 2040 and 2106. 541 */ 542 #define HFSPLUS_UTC_OFFSET 2082844800U 543 544 static inline time64_t __hfsp_mt2ut(__be32 mt) 545 { 546 time64_t ut = (u32)(be32_to_cpu(mt) - HFSPLUS_UTC_OFFSET); 547 548 return ut; 549 } 550 551 static inline __be32 __hfsp_ut2mt(time64_t ut) 552 { 553 return cpu_to_be32(lower_32_bits(ut) + HFSPLUS_UTC_OFFSET); 554 } 555 556 /* compatibility */ 557 #define hfsp_mt2ut(t) (struct timespec64){ .tv_sec = __hfsp_mt2ut(t) } 558 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec) 559 #define hfsp_now2mt() __hfsp_ut2mt(ktime_get_real_seconds()) 560 561 #endif 562