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