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 #include <linux/fs.h> 15 #include <linux/mutex.h> 16 #include <linux/buffer_head.h> 17 #include <linux/blkdev.h> 18 #include <linux/fs_context.h> 19 #include "hfsplus_raw.h" 20 21 /* Runtime config options */ 22 #define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */ 23 24 #define HFSPLUS_TYPE_DATA 0x00 25 #define HFSPLUS_TYPE_RSRC 0xFF 26 27 typedef int (*btree_keycmp)(const hfsplus_btree_key *, 28 const hfsplus_btree_key *); 29 30 #define NODE_HASH_SIZE 256 31 32 /* B-tree mutex nested subclasses */ 33 enum hfsplus_btree_mutex_classes { 34 CATALOG_BTREE_MUTEX, 35 EXTENTS_BTREE_MUTEX, 36 ATTR_BTREE_MUTEX, 37 }; 38 39 /* An HFS+ BTree held in memory */ 40 struct hfs_btree { 41 struct super_block *sb; 42 struct inode *inode; 43 btree_keycmp keycmp; 44 45 u32 cnid; 46 u32 root; 47 u32 leaf_count; 48 u32 leaf_head; 49 u32 leaf_tail; 50 u32 node_count; 51 u32 free_nodes; 52 u32 attributes; 53 54 unsigned int node_size; 55 unsigned int node_size_shift; 56 unsigned int max_key_len; 57 unsigned int depth; 58 59 struct mutex tree_lock; 60 61 unsigned int pages_per_bnode; 62 spinlock_t hash_lock; 63 struct hfs_bnode *node_hash[NODE_HASH_SIZE]; 64 int node_hash_cnt; 65 }; 66 67 struct page; 68 69 /* An HFS+ BTree node in memory */ 70 struct hfs_bnode { 71 struct hfs_btree *tree; 72 73 u32 prev; 74 u32 this; 75 u32 next; 76 u32 parent; 77 78 u16 num_recs; 79 u8 type; 80 u8 height; 81 82 struct hfs_bnode *next_hash; 83 unsigned long flags; 84 wait_queue_head_t lock_wq; 85 atomic_t refcnt; 86 unsigned int page_offset; 87 struct page *page[]; 88 }; 89 90 #define HFS_BNODE_LOCK 0 91 #define HFS_BNODE_ERROR 1 92 #define HFS_BNODE_NEW 2 93 #define HFS_BNODE_DIRTY 3 94 #define HFS_BNODE_DELETED 4 95 96 /* 97 * Attributes file states 98 */ 99 #define HFSPLUS_EMPTY_ATTR_TREE 0 100 #define HFSPLUS_CREATING_ATTR_TREE 1 101 #define HFSPLUS_VALID_ATTR_TREE 2 102 #define HFSPLUS_FAILED_ATTR_TREE 3 103 104 /* 105 * HFS+ superblock info (built from Volume Header on disk) 106 */ 107 108 struct hfsplus_vh; 109 struct hfs_btree; 110 111 struct hfsplus_sb_info { 112 void *s_vhdr_buf; 113 struct hfsplus_vh *s_vhdr; 114 void *s_backup_vhdr_buf; 115 struct hfsplus_vh *s_backup_vhdr; 116 struct hfs_btree *ext_tree; 117 struct hfs_btree *cat_tree; 118 struct hfs_btree *attr_tree; 119 atomic_t attr_tree_state; 120 struct inode *alloc_file; 121 struct inode *hidden_dir; 122 struct nls_table *nls; 123 124 /* Runtime variables */ 125 u32 blockoffset; 126 u32 min_io_size; 127 sector_t part_start; 128 sector_t sect_count; 129 int fs_shift; 130 131 /* immutable data from the volume header */ 132 u32 alloc_blksz; 133 int alloc_blksz_shift; 134 u32 total_blocks; 135 u32 data_clump_blocks, rsrc_clump_blocks; 136 137 /* mutable data from the volume header, protected by alloc_mutex */ 138 u32 free_blocks; 139 struct mutex alloc_mutex; 140 141 /* mutable data from the volume header, protected by vh_mutex */ 142 u32 next_cnid; 143 u32 file_count; 144 u32 folder_count; 145 struct mutex vh_mutex; 146 147 /* Config options */ 148 u32 creator; 149 u32 type; 150 151 umode_t umask; 152 kuid_t uid; 153 kgid_t gid; 154 155 int part, session; 156 unsigned long flags; 157 158 int work_queued; /* non-zero delayed work is queued */ 159 struct delayed_work sync_work; /* FS sync delayed work */ 160 spinlock_t work_lock; /* protects sync_work and work_queued */ 161 struct rcu_head rcu; 162 }; 163 164 #define HFSPLUS_SB_WRITEBACKUP 0 165 #define HFSPLUS_SB_NODECOMPOSE 1 166 #define HFSPLUS_SB_FORCE 2 167 #define HFSPLUS_SB_HFSX 3 168 #define HFSPLUS_SB_CASEFOLD 4 169 #define HFSPLUS_SB_NOBARRIER 5 170 #define HFSPLUS_SB_UID 6 171 #define HFSPLUS_SB_GID 7 172 173 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb) 174 { 175 return sb->s_fs_info; 176 } 177 178 179 struct hfsplus_inode_info { 180 atomic_t opencnt; 181 182 /* 183 * Extent allocation information, protected by extents_lock. 184 */ 185 u32 first_blocks; 186 u32 clump_blocks; 187 u32 alloc_blocks; 188 u32 cached_start; 189 u32 cached_blocks; 190 hfsplus_extent_rec first_extents; 191 hfsplus_extent_rec cached_extents; 192 unsigned int extent_state; 193 struct mutex extents_lock; 194 195 /* 196 * Immutable data. 197 */ 198 struct inode *rsrc_inode; 199 __be32 create_date; 200 201 /* 202 * Protected by sbi->vh_mutex. 203 */ 204 u32 linkid; 205 206 /* 207 * Accessed using atomic bitops. 208 */ 209 unsigned long flags; 210 211 /* 212 * Protected by i_mutex. 213 */ 214 sector_t fs_blocks; 215 u8 userflags; /* BSD user file flags */ 216 u32 subfolders; /* Subfolder count (HFSX only) */ 217 struct list_head open_dir_list; 218 spinlock_t open_dir_lock; 219 loff_t phys_size; 220 221 struct inode vfs_inode; 222 }; 223 224 #define HFSPLUS_EXT_DIRTY 0x0001 225 #define HFSPLUS_EXT_NEW 0x0002 226 227 #define HFSPLUS_I_RSRC 0 /* represents a resource fork */ 228 #define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */ 229 #define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */ 230 #define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */ 231 #define HFSPLUS_I_ATTR_DIRTY 4 /* has changes in the attributes tree */ 232 233 #define HFSPLUS_IS_RSRC(inode) \ 234 test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags) 235 236 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) 237 { 238 return container_of(inode, struct hfsplus_inode_info, vfs_inode); 239 } 240 241 #define HFSPLUS_CAT_TREE_I(sb) \ 242 HFSPLUS_SB(sb)->cat_tree->inode 243 #define HFSPLUS_EXT_TREE_I(sb) \ 244 HFSPLUS_SB(sb)->ext_tree->inode 245 #define HFSPLUS_ATTR_TREE_I(sb) \ 246 HFSPLUS_SB(sb)->attr_tree->inode 247 248 /* 249 * Mark an inode dirty, and also mark the btree in which the 250 * specific type of metadata is stored. 251 * For data or metadata that gets written back by into the catalog btree 252 * by hfsplus_write_inode a plain mark_inode_dirty call is enough. 253 */ 254 static inline void hfsplus_mark_inode_dirty(struct inode *inode, 255 unsigned int flag) 256 { 257 set_bit(flag, &HFSPLUS_I(inode)->flags); 258 mark_inode_dirty(inode); 259 } 260 261 struct hfs_find_data { 262 /* filled by caller */ 263 hfsplus_btree_key *search_key; 264 hfsplus_btree_key *key; 265 /* filled by find */ 266 struct hfs_btree *tree; 267 struct hfs_bnode *bnode; 268 /* filled by findrec */ 269 int record; 270 int keyoffset, keylength; 271 int entryoffset, entrylength; 272 }; 273 274 struct hfsplus_readdir_data { 275 struct list_head list; 276 struct file *file; 277 struct hfsplus_cat_key key; 278 }; 279 280 /* 281 * Find minimum acceptible I/O size for an hfsplus sb. 282 */ 283 static inline unsigned short hfsplus_min_io_size(struct super_block *sb) 284 { 285 return max_t(unsigned short, HFSPLUS_SB(sb)->min_io_size, 286 HFSPLUS_SECTOR_SIZE); 287 } 288 289 #define hfs_btree_open hfsplus_btree_open 290 #define hfs_btree_close hfsplus_btree_close 291 #define hfs_btree_write hfsplus_btree_write 292 #define hfs_bmap_reserve hfsplus_bmap_reserve 293 #define hfs_bmap_alloc hfsplus_bmap_alloc 294 #define hfs_bmap_free hfsplus_bmap_free 295 #define hfs_bnode_read hfsplus_bnode_read 296 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16 297 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8 298 #define hfs_bnode_read_key hfsplus_bnode_read_key 299 #define hfs_bnode_write hfsplus_bnode_write 300 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16 301 #define hfs_bnode_clear hfsplus_bnode_clear 302 #define hfs_bnode_copy hfsplus_bnode_copy 303 #define hfs_bnode_move hfsplus_bnode_move 304 #define hfs_bnode_dump hfsplus_bnode_dump 305 #define hfs_bnode_unlink hfsplus_bnode_unlink 306 #define hfs_bnode_findhash hfsplus_bnode_findhash 307 #define hfs_bnode_find hfsplus_bnode_find 308 #define hfs_bnode_unhash hfsplus_bnode_unhash 309 #define hfs_bnode_free hfsplus_bnode_free 310 #define hfs_bnode_create hfsplus_bnode_create 311 #define hfs_bnode_get hfsplus_bnode_get 312 #define hfs_bnode_put hfsplus_bnode_put 313 #define hfs_brec_lenoff hfsplus_brec_lenoff 314 #define hfs_brec_keylen hfsplus_brec_keylen 315 #define hfs_brec_insert hfsplus_brec_insert 316 #define hfs_brec_remove hfsplus_brec_remove 317 #define hfs_find_init hfsplus_find_init 318 #define hfs_find_exit hfsplus_find_exit 319 #define __hfs_brec_find __hfsplus_brec_find 320 #define hfs_brec_find hfsplus_brec_find 321 #define hfs_brec_read hfsplus_brec_read 322 #define hfs_brec_goto hfsplus_brec_goto 323 #define hfs_part_find hfsplus_part_find 324 325 /* 326 * hfs+-specific ioctl for making the filesystem bootable 327 */ 328 #define HFSPLUS_IOC_BLESS _IO('h', 0x80) 329 330 typedef int (*search_strategy_t)(struct hfs_bnode *, 331 struct hfs_find_data *, 332 int *, int *, int *); 333 334 /* 335 * Functions in any *.c used in other files 336 */ 337 338 /* attributes.c */ 339 int __init hfsplus_create_attr_tree_cache(void); 340 void hfsplus_destroy_attr_tree_cache(void); 341 int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *k1, 342 const hfsplus_btree_key *k2); 343 int hfsplus_attr_build_key(struct super_block *sb, hfsplus_btree_key *key, 344 u32 cnid, const char *name); 345 hfsplus_attr_entry *hfsplus_alloc_attr_entry(void); 346 void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry); 347 int hfsplus_find_attr(struct super_block *sb, u32 cnid, const char *name, 348 struct hfs_find_data *fd); 349 int hfsplus_attr_exists(struct inode *inode, const char *name); 350 int hfsplus_create_attr(struct inode *inode, const char *name, 351 const void *value, size_t size); 352 int hfsplus_delete_attr(struct inode *inode, const char *name); 353 int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid); 354 int hfsplus_replace_attr(struct inode *inode, 355 const char *name, 356 const void *value, size_t size); 357 358 /* bitmap.c */ 359 int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, 360 u32 *max); 361 int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count); 362 363 /* btree.c */ 364 u32 hfsplus_calc_btree_clump_size(u32 block_size, u32 node_size, u64 sectors, 365 int file_id); 366 struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id); 367 void hfs_btree_close(struct hfs_btree *tree); 368 int hfs_btree_write(struct hfs_btree *tree); 369 int hfs_bmap_reserve(struct hfs_btree *tree, u32 rsvd_nodes); 370 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree); 371 void hfs_bmap_free(struct hfs_bnode *node); 372 373 /* bnode.c */ 374 void hfs_bnode_read(struct hfs_bnode *node, void *buf, u32 off, u32 len); 375 u16 hfs_bnode_read_u16(struct hfs_bnode *node, u32 off); 376 u8 hfs_bnode_read_u8(struct hfs_bnode *node, u32 off); 377 void hfs_bnode_read_key(struct hfs_bnode *node, void *key, u32 off); 378 void hfs_bnode_write(struct hfs_bnode *node, void *buf, u32 off, u32 len); 379 void hfs_bnode_write_u16(struct hfs_bnode *node, u32 off, u16 data); 380 void hfs_bnode_clear(struct hfs_bnode *node, u32 off, u32 len); 381 void hfs_bnode_copy(struct hfs_bnode *dst_node, u32 dst, 382 struct hfs_bnode *src_node, u32 src, u32 len); 383 void hfs_bnode_move(struct hfs_bnode *node, u32 dst, u32 src, u32 len); 384 void hfs_bnode_dump(struct hfs_bnode *node); 385 void hfs_bnode_unlink(struct hfs_bnode *node); 386 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *tree, u32 cnid); 387 void hfs_bnode_unhash(struct hfs_bnode *node); 388 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num); 389 void hfs_bnode_free(struct hfs_bnode *node); 390 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num); 391 void hfs_bnode_get(struct hfs_bnode *node); 392 void hfs_bnode_put(struct hfs_bnode *node); 393 bool hfs_bnode_need_zeroout(struct hfs_btree *tree); 394 395 /* brec.c */ 396 u16 hfs_brec_lenoff(struct hfs_bnode *node, u16 rec, u16 *off); 397 u16 hfs_brec_keylen(struct hfs_bnode *node, u16 rec); 398 int hfs_brec_insert(struct hfs_find_data *fd, void *entry, u32 entry_len); 399 int hfs_brec_remove(struct hfs_find_data *fd); 400 401 /* bfind.c */ 402 int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd); 403 void hfs_find_exit(struct hfs_find_data *fd); 404 int hfs_find_1st_rec_by_cnid(struct hfs_bnode *bnode, struct hfs_find_data *fd, 405 int *begin, int *end, int *cur_rec); 406 int hfs_find_rec_by_key(struct hfs_bnode *bnode, struct hfs_find_data *fd, 407 int *begin, int *end, int *cur_rec); 408 int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd, 409 search_strategy_t rec_found); 410 int hfs_brec_find(struct hfs_find_data *fd, search_strategy_t do_key_compare); 411 int hfs_brec_read(struct hfs_find_data *fd, void *rec, u32 rec_len); 412 int hfs_brec_goto(struct hfs_find_data *fd, int cnt); 413 414 /* catalog.c */ 415 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1, 416 const hfsplus_btree_key *k2); 417 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1, 418 const hfsplus_btree_key *k2); 419 int hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key, 420 u32 parent, const struct qstr *str); 421 void hfsplus_cat_build_key_with_cnid(struct super_block *sb, 422 hfsplus_btree_key *key, u32 parent); 423 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms); 424 int hfsplus_find_cat(struct super_block *sb, u32 cnid, 425 struct hfs_find_data *fd); 426 int hfsplus_create_cat(u32 cnid, struct inode *dir, const struct qstr *str, 427 struct inode *inode); 428 int hfsplus_delete_cat(u32 cnid, struct inode *dir, const struct qstr *str); 429 int hfsplus_rename_cat(u32 cnid, struct inode *src_dir, const struct qstr *src_name, 430 struct inode *dst_dir, const struct qstr *dst_name); 431 432 /* dir.c */ 433 extern const struct inode_operations hfsplus_dir_inode_operations; 434 extern const struct file_operations hfsplus_dir_operations; 435 436 /* extents.c */ 437 int hfsplus_ext_cmp_key(const hfsplus_btree_key *k1, 438 const hfsplus_btree_key *k2); 439 int hfsplus_ext_write_extent(struct inode *inode); 440 int hfsplus_get_block(struct inode *inode, sector_t iblock, 441 struct buffer_head *bh_result, int create); 442 int hfsplus_free_fork(struct super_block *sb, u32 cnid, 443 struct hfsplus_fork_raw *fork, int type); 444 int hfsplus_file_extend(struct inode *inode, bool zeroout); 445 void hfsplus_file_truncate(struct inode *inode); 446 447 /* inode.c */ 448 extern const struct address_space_operations hfsplus_aops; 449 extern const struct address_space_operations hfsplus_btree_aops; 450 extern const struct dentry_operations hfsplus_dentry_operations; 451 452 int hfsplus_write_begin(const struct kiocb *iocb, 453 struct address_space *mapping, 454 loff_t pos, unsigned len, struct folio **foliop, 455 void **fsdata); 456 struct inode *hfsplus_new_inode(struct super_block *sb, struct inode *dir, 457 umode_t mode); 458 void hfsplus_delete_inode(struct inode *inode); 459 void hfsplus_inode_read_fork(struct inode *inode, 460 struct hfsplus_fork_raw *fork); 461 void hfsplus_inode_write_fork(struct inode *inode, 462 struct hfsplus_fork_raw *fork); 463 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd); 464 int hfsplus_cat_write_inode(struct inode *inode); 465 int hfsplus_getattr(struct mnt_idmap *idmap, const struct path *path, 466 struct kstat *stat, u32 request_mask, 467 unsigned int query_flags); 468 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, 469 int datasync); 470 int hfsplus_fileattr_get(struct dentry *dentry, struct file_kattr *fa); 471 int hfsplus_fileattr_set(struct mnt_idmap *idmap, 472 struct dentry *dentry, struct file_kattr *fa); 473 474 /* ioctl.c */ 475 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 476 477 /* options.c */ 478 void hfsplus_fill_defaults(struct hfsplus_sb_info *opts); 479 int hfsplus_parse_param(struct fs_context *fc, struct fs_parameter *param); 480 int hfsplus_show_options(struct seq_file *seq, struct dentry *root); 481 482 /* part_tbl.c */ 483 int hfs_part_find(struct super_block *sb, sector_t *part_start, 484 sector_t *part_size); 485 486 /* super.c */ 487 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino); 488 void hfsplus_mark_mdb_dirty(struct super_block *sb); 489 void hfsplus_prepare_volume_header_for_commit(struct hfsplus_vh *vhdr); 490 int hfsplus_commit_superblock(struct super_block *sb); 491 492 /* tables.c */ 493 extern u16 hfsplus_case_fold_table[]; 494 extern u16 hfsplus_decompose_table[]; 495 extern u16 hfsplus_compose_table[]; 496 497 /* unicode.c */ 498 int hfsplus_strcasecmp(const struct hfsplus_unistr *s1, 499 const struct hfsplus_unistr *s2); 500 int hfsplus_strcmp(const struct hfsplus_unistr *s1, 501 const struct hfsplus_unistr *s2); 502 int hfsplus_uni2asc_str(struct super_block *sb, 503 const struct hfsplus_unistr *ustr, char *astr, 504 int *len_p); 505 int hfsplus_uni2asc_xattr_str(struct super_block *sb, 506 const struct hfsplus_attr_unistr *ustr, 507 char *astr, int *len_p); 508 int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr, 509 int max_unistr_len, const char *astr, int len, 510 int name_type); 511 int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str); 512 int hfsplus_compare_dentry(const struct dentry *dentry, unsigned int len, 513 const char *str, const struct qstr *name); 514 515 /* wrapper.c */ 516 int hfsplus_submit_bio(struct super_block *sb, sector_t sector, void *buf, 517 void **data, blk_opf_t opf); 518 int hfsplus_read_wrapper(struct super_block *sb); 519 520 static inline u32 hfsplus_cat_thread_size(const struct hfsplus_cat_thread *thread) 521 { 522 return offsetof(struct hfsplus_cat_thread, nodeName) + 523 offsetof(struct hfsplus_unistr, unicode) + 524 be16_to_cpu(thread->nodeName.length) * sizeof(hfsplus_unichr); 525 } 526 527 int hfsplus_brec_read_cat(struct hfs_find_data *fd, hfsplus_cat_entry *entry); 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 static inline enum hfsplus_btree_mutex_classes 552 hfsplus_btree_lock_class(struct hfs_btree *tree) 553 { 554 enum hfsplus_btree_mutex_classes class; 555 556 switch (tree->cnid) { 557 case HFSPLUS_CAT_CNID: 558 class = CATALOG_BTREE_MUTEX; 559 break; 560 case HFSPLUS_EXT_CNID: 561 class = EXTENTS_BTREE_MUTEX; 562 break; 563 case HFSPLUS_ATTR_CNID: 564 class = ATTR_BTREE_MUTEX; 565 break; 566 default: 567 BUG(); 568 } 569 return class; 570 } 571 572 static inline 573 bool is_bnode_offset_valid(struct hfs_bnode *node, u32 off) 574 { 575 bool is_valid; 576 577 if (!node || !node->tree) 578 return false; 579 580 is_valid = off < node->tree->node_size; 581 582 if (!is_valid) { 583 pr_err("requested invalid offset: " 584 "NODE: id %u, type %#x, height %u, " 585 "node_size %u, offset %u\n", 586 node->this, node->type, node->height, 587 node->tree->node_size, off); 588 } 589 590 return is_valid; 591 } 592 593 static inline 594 u32 check_and_correct_requested_length(struct hfs_bnode *node, u32 off, u32 len) 595 { 596 unsigned int node_size; 597 598 if (!is_bnode_offset_valid(node, off)) 599 return 0; 600 601 node_size = node->tree->node_size; 602 603 if ((off + len) > node_size) { 604 u32 new_len = node_size - off; 605 606 pr_err("requested length has been corrected: " 607 "NODE: id %u, type %#x, height %u, " 608 "node_size %u, offset %u, " 609 "requested_len %u, corrected_len %u\n", 610 node->this, node->type, node->height, 611 node->tree->node_size, off, len, new_len); 612 613 return new_len; 614 } 615 616 return len; 617 } 618 619 /* compatibility */ 620 #define hfsp_mt2ut(t) (struct timespec64){ .tv_sec = __hfsp_mt2ut(t) } 621 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec) 622 #define hfsp_now2mt() __hfsp_ut2mt(ktime_get_real_seconds()) 623 624 #endif 625