1 /* 2 * linux/include/linux/hfsplus_fs.h 3 * 4 * Copyright (C) 1999 5 * Brad Boyer (flar@pants.nu) 6 * (C) 2003 Ardis Technologies <roman@ardistech.com> 7 * 8 */ 9 10 #ifndef _LINUX_HFSPLUS_FS_H 11 #define _LINUX_HFSPLUS_FS_H 12 13 #ifdef pr_fmt 14 #undef pr_fmt 15 #endif 16 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 18 19 #include <linux/fs.h> 20 #include <linux/mutex.h> 21 #include <linux/buffer_head.h> 22 #include <linux/blkdev.h> 23 #include "hfsplus_raw.h" 24 25 #define DBG_BNODE_REFS 0x00000001 26 #define DBG_BNODE_MOD 0x00000002 27 #define DBG_CAT_MOD 0x00000004 28 #define DBG_INODE 0x00000008 29 #define DBG_SUPER 0x00000010 30 #define DBG_EXTENT 0x00000020 31 #define DBG_BITMAP 0x00000040 32 #define DBG_ATTR_MOD 0x00000080 33 34 #if 0 35 #define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD) 36 #define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) 37 #define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) 38 #endif 39 #define DBG_MASK (0) 40 41 #define hfs_dbg(flg, fmt, ...) \ 42 do { \ 43 if (DBG_##flg & DBG_MASK) \ 44 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ 45 } while (0) 46 47 #define hfs_dbg_cont(flg, fmt, ...) \ 48 do { \ 49 if (DBG_##flg & DBG_MASK) \ 50 pr_cont(fmt, ##__VA_ARGS__); \ 51 } while (0) 52 53 /* Runtime config options */ 54 #define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */ 55 56 #define HFSPLUS_TYPE_DATA 0x00 57 #define HFSPLUS_TYPE_RSRC 0xFF 58 59 typedef int (*btree_keycmp)(const hfsplus_btree_key *, 60 const hfsplus_btree_key *); 61 62 #define NODE_HASH_SIZE 256 63 64 /* B-tree mutex nested subclasses */ 65 enum hfsplus_btree_mutex_classes { 66 CATALOG_BTREE_MUTEX, 67 EXTENTS_BTREE_MUTEX, 68 ATTR_BTREE_MUTEX, 69 }; 70 71 /* An HFS+ BTree held in memory */ 72 struct hfs_btree { 73 struct super_block *sb; 74 struct inode *inode; 75 btree_keycmp keycmp; 76 77 u32 cnid; 78 u32 root; 79 u32 leaf_count; 80 u32 leaf_head; 81 u32 leaf_tail; 82 u32 node_count; 83 u32 free_nodes; 84 u32 attributes; 85 86 unsigned int node_size; 87 unsigned int node_size_shift; 88 unsigned int max_key_len; 89 unsigned int depth; 90 91 struct mutex tree_lock; 92 93 unsigned int pages_per_bnode; 94 spinlock_t hash_lock; 95 struct hfs_bnode *node_hash[NODE_HASH_SIZE]; 96 int node_hash_cnt; 97 }; 98 99 struct page; 100 101 /* An HFS+ BTree node in memory */ 102 struct hfs_bnode { 103 struct hfs_btree *tree; 104 105 u32 prev; 106 u32 this; 107 u32 next; 108 u32 parent; 109 110 u16 num_recs; 111 u8 type; 112 u8 height; 113 114 struct hfs_bnode *next_hash; 115 unsigned long flags; 116 wait_queue_head_t lock_wq; 117 atomic_t refcnt; 118 unsigned int page_offset; 119 struct page *page[0]; 120 }; 121 122 #define HFS_BNODE_LOCK 0 123 #define HFS_BNODE_ERROR 1 124 #define HFS_BNODE_NEW 2 125 #define HFS_BNODE_DIRTY 3 126 #define HFS_BNODE_DELETED 4 127 128 /* 129 * HFS+ superblock info (built from Volume Header on disk) 130 */ 131 132 struct hfsplus_vh; 133 struct hfs_btree; 134 135 struct hfsplus_sb_info { 136 void *s_vhdr_buf; 137 struct hfsplus_vh *s_vhdr; 138 void *s_backup_vhdr_buf; 139 struct hfsplus_vh *s_backup_vhdr; 140 struct hfs_btree *ext_tree; 141 struct hfs_btree *cat_tree; 142 struct hfs_btree *attr_tree; 143 struct inode *alloc_file; 144 struct inode *hidden_dir; 145 struct nls_table *nls; 146 147 /* Runtime variables */ 148 u32 blockoffset; 149 sector_t part_start; 150 sector_t sect_count; 151 int fs_shift; 152 153 /* immutable data from the volume header */ 154 u32 alloc_blksz; 155 int alloc_blksz_shift; 156 u32 total_blocks; 157 u32 data_clump_blocks, rsrc_clump_blocks; 158 159 /* mutable data from the volume header, protected by alloc_mutex */ 160 u32 free_blocks; 161 struct mutex alloc_mutex; 162 163 /* mutable data from the volume header, protected by vh_mutex */ 164 u32 next_cnid; 165 u32 file_count; 166 u32 folder_count; 167 struct mutex vh_mutex; 168 169 /* Config options */ 170 u32 creator; 171 u32 type; 172 173 umode_t umask; 174 kuid_t uid; 175 kgid_t gid; 176 177 int part, session; 178 unsigned long flags; 179 180 int work_queued; /* non-zero delayed work is queued */ 181 struct delayed_work sync_work; /* FS sync delayed work */ 182 spinlock_t work_lock; /* protects sync_work and work_queued */ 183 }; 184 185 #define HFSPLUS_SB_WRITEBACKUP 0 186 #define HFSPLUS_SB_NODECOMPOSE 1 187 #define HFSPLUS_SB_FORCE 2 188 #define HFSPLUS_SB_HFSX 3 189 #define HFSPLUS_SB_CASEFOLD 4 190 #define HFSPLUS_SB_NOBARRIER 5 191 HFSPLUS_SB(struct super_block * sb)192 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb) 193 { 194 return sb->s_fs_info; 195 } 196 197 198 struct hfsplus_inode_info { 199 atomic_t opencnt; 200 201 /* 202 * Extent allocation information, protected by extents_lock. 203 */ 204 u32 first_blocks; 205 u32 clump_blocks; 206 u32 alloc_blocks; 207 u32 cached_start; 208 u32 cached_blocks; 209 hfsplus_extent_rec first_extents; 210 hfsplus_extent_rec cached_extents; 211 unsigned int extent_state; 212 struct mutex extents_lock; 213 214 /* 215 * Immutable data. 216 */ 217 struct inode *rsrc_inode; 218 __be32 create_date; 219 220 /* 221 * Protected by sbi->vh_mutex. 222 */ 223 u32 linkid; 224 225 /* 226 * Accessed using atomic bitops. 227 */ 228 unsigned long flags; 229 230 /* 231 * Protected by i_mutex. 232 */ 233 sector_t fs_blocks; 234 u8 userflags; /* BSD user file flags */ 235 struct list_head open_dir_list; 236 loff_t phys_size; 237 238 struct inode vfs_inode; 239 }; 240 241 #define HFSPLUS_EXT_DIRTY 0x0001 242 #define HFSPLUS_EXT_NEW 0x0002 243 244 #define HFSPLUS_I_RSRC 0 /* represents a resource fork */ 245 #define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */ 246 #define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */ 247 #define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */ 248 #define HFSPLUS_I_ATTR_DIRTY 4 /* has changes in the attributes tree */ 249 250 #define HFSPLUS_IS_RSRC(inode) \ 251 test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags) 252 HFSPLUS_I(struct inode * inode)253 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) 254 { 255 return list_entry(inode, struct hfsplus_inode_info, vfs_inode); 256 } 257 258 /* 259 * Mark an inode dirty, and also mark the btree in which the 260 * specific type of metadata is stored. 261 * For data or metadata that gets written back by into the catalog btree 262 * by hfsplus_write_inode a plain mark_inode_dirty call is enough. 263 */ hfsplus_mark_inode_dirty(struct inode * inode,unsigned int flag)264 static inline void hfsplus_mark_inode_dirty(struct inode *inode, 265 unsigned int flag) 266 { 267 set_bit(flag, &HFSPLUS_I(inode)->flags); 268 mark_inode_dirty(inode); 269 } 270 271 struct hfs_find_data { 272 /* filled by caller */ 273 hfsplus_btree_key *search_key; 274 hfsplus_btree_key *key; 275 /* filled by find */ 276 struct hfs_btree *tree; 277 struct hfs_bnode *bnode; 278 /* filled by findrec */ 279 int record; 280 int keyoffset, keylength; 281 int entryoffset, entrylength; 282 }; 283 284 struct hfsplus_readdir_data { 285 struct list_head list; 286 struct file *file; 287 struct hfsplus_cat_key key; 288 }; 289 290 /* 291 * Find minimum acceptible I/O size for an hfsplus sb. 292 */ hfsplus_min_io_size(struct super_block * sb)293 static inline unsigned short hfsplus_min_io_size(struct super_block *sb) 294 { 295 return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev), 296 HFSPLUS_SECTOR_SIZE); 297 } 298 299 #define hfs_btree_open hfsplus_btree_open 300 #define hfs_btree_close hfsplus_btree_close 301 #define hfs_btree_write hfsplus_btree_write 302 #define hfs_bmap_alloc hfsplus_bmap_alloc 303 #define hfs_bmap_free hfsplus_bmap_free 304 #define hfs_bnode_read hfsplus_bnode_read 305 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16 306 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8 307 #define hfs_bnode_read_key hfsplus_bnode_read_key 308 #define hfs_bnode_write hfsplus_bnode_write 309 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16 310 #define hfs_bnode_clear hfsplus_bnode_clear 311 #define hfs_bnode_copy hfsplus_bnode_copy 312 #define hfs_bnode_move hfsplus_bnode_move 313 #define hfs_bnode_dump hfsplus_bnode_dump 314 #define hfs_bnode_unlink hfsplus_bnode_unlink 315 #define hfs_bnode_findhash hfsplus_bnode_findhash 316 #define hfs_bnode_find hfsplus_bnode_find 317 #define hfs_bnode_unhash hfsplus_bnode_unhash 318 #define hfs_bnode_free hfsplus_bnode_free 319 #define hfs_bnode_create hfsplus_bnode_create 320 #define hfs_bnode_get hfsplus_bnode_get 321 #define hfs_bnode_put hfsplus_bnode_put 322 #define hfs_brec_lenoff hfsplus_brec_lenoff 323 #define hfs_brec_keylen hfsplus_brec_keylen 324 #define hfs_brec_insert hfsplus_brec_insert 325 #define hfs_brec_remove hfsplus_brec_remove 326 #define hfs_find_init hfsplus_find_init 327 #define hfs_find_exit hfsplus_find_exit 328 #define __hfs_brec_find __hfsplus_brec_find 329 #define hfs_brec_find hfsplus_brec_find 330 #define hfs_brec_read hfsplus_brec_read 331 #define hfs_brec_goto hfsplus_brec_goto 332 #define hfs_part_find hfsplus_part_find 333 334 /* 335 * definitions for ext2 flag ioctls (linux really needs a generic 336 * interface for this). 337 */ 338 339 /* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support 340 * chattr/lsattr */ 341 #define HFSPLUS_IOC_EXT2_GETFLAGS FS_IOC_GETFLAGS 342 #define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS 343 344 345 /* 346 * hfs+-specific ioctl for making the filesystem bootable 347 */ 348 #define HFSPLUS_IOC_BLESS _IO('h', 0x80) 349 350 typedef int (*search_strategy_t)(struct hfs_bnode *, 351 struct hfs_find_data *, 352 int *, int *, int *); 353 354 /* 355 * Functions in any *.c used in other files 356 */ 357 358 /* attributes.c */ 359 int hfsplus_create_attr_tree_cache(void); 360 void hfsplus_destroy_attr_tree_cache(void); 361 hfsplus_attr_entry *hfsplus_alloc_attr_entry(void); 362 void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry_p); 363 int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *, 364 const hfsplus_btree_key *); 365 int hfsplus_attr_build_key(struct super_block *, hfsplus_btree_key *, 366 u32, const char *); 367 void hfsplus_attr_build_key_uni(hfsplus_btree_key *key, 368 u32 cnid, 369 struct hfsplus_attr_unistr *name); 370 int hfsplus_find_attr(struct super_block *, u32, 371 const char *, struct hfs_find_data *); 372 int hfsplus_attr_exists(struct inode *inode, const char *name); 373 int hfsplus_create_attr(struct inode *, const char *, const void *, size_t); 374 int hfsplus_delete_attr(struct inode *, const char *); 375 int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid); 376 377 /* bitmap.c */ 378 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *); 379 int hfsplus_block_free(struct super_block *, u32, u32); 380 381 /* btree.c */ 382 struct hfs_btree *hfs_btree_open(struct super_block *, u32); 383 void hfs_btree_close(struct hfs_btree *); 384 int hfs_btree_write(struct hfs_btree *); 385 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *); 386 void hfs_bmap_free(struct hfs_bnode *); 387 388 /* bnode.c */ 389 void hfs_bnode_read(struct hfs_bnode *, void *, int, int); 390 u16 hfs_bnode_read_u16(struct hfs_bnode *, int); 391 u8 hfs_bnode_read_u8(struct hfs_bnode *, int); 392 void hfs_bnode_read_key(struct hfs_bnode *, void *, int); 393 void hfs_bnode_write(struct hfs_bnode *, void *, int, int); 394 void hfs_bnode_write_u16(struct hfs_bnode *, int, u16); 395 void hfs_bnode_clear(struct hfs_bnode *, int, int); 396 void hfs_bnode_copy(struct hfs_bnode *, int, 397 struct hfs_bnode *, int, int); 398 void hfs_bnode_move(struct hfs_bnode *, int, int, int); 399 void hfs_bnode_dump(struct hfs_bnode *); 400 void hfs_bnode_unlink(struct hfs_bnode *); 401 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32); 402 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32); 403 void hfs_bnode_unhash(struct hfs_bnode *); 404 void hfs_bnode_free(struct hfs_bnode *); 405 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32); 406 void hfs_bnode_get(struct hfs_bnode *); 407 void hfs_bnode_put(struct hfs_bnode *); 408 409 /* brec.c */ 410 u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *); 411 u16 hfs_brec_keylen(struct hfs_bnode *, u16); 412 int hfs_brec_insert(struct hfs_find_data *, void *, int); 413 int hfs_brec_remove(struct hfs_find_data *); 414 415 /* bfind.c */ 416 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *); 417 void hfs_find_exit(struct hfs_find_data *); 418 int hfs_find_1st_rec_by_cnid(struct hfs_bnode *, 419 struct hfs_find_data *, 420 int *, int *, int *); 421 int hfs_find_rec_by_key(struct hfs_bnode *, 422 struct hfs_find_data *, 423 int *, int *, int *); 424 int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *, 425 search_strategy_t); 426 int hfs_brec_find(struct hfs_find_data *, search_strategy_t); 427 int hfs_brec_read(struct hfs_find_data *, void *, int); 428 int hfs_brec_goto(struct hfs_find_data *, int); 429 430 /* catalog.c */ 431 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *, 432 const hfsplus_btree_key *); 433 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *, 434 const hfsplus_btree_key *); 435 void hfsplus_cat_build_key(struct super_block *sb, 436 hfsplus_btree_key *, u32, struct qstr *); 437 int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *); 438 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *); 439 int hfsplus_delete_cat(u32, struct inode *, struct qstr *); 440 int hfsplus_rename_cat(u32, struct inode *, struct qstr *, 441 struct inode *, struct qstr *); 442 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms); 443 444 /* dir.c */ 445 extern const struct inode_operations hfsplus_dir_inode_operations; 446 extern const struct file_operations hfsplus_dir_operations; 447 448 /* extents.c */ 449 int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *); 450 int hfsplus_ext_write_extent(struct inode *); 451 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int); 452 int hfsplus_free_fork(struct super_block *, u32, 453 struct hfsplus_fork_raw *, int); 454 int hfsplus_file_extend(struct inode *); 455 void hfsplus_file_truncate(struct inode *); 456 457 /* inode.c */ 458 extern const struct address_space_operations hfsplus_aops; 459 extern const struct address_space_operations hfsplus_btree_aops; 460 extern const struct dentry_operations hfsplus_dentry_operations; 461 462 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *); 463 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *); 464 int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *); 465 int hfsplus_cat_write_inode(struct inode *); 466 struct inode *hfsplus_new_inode(struct super_block *, umode_t); 467 void hfsplus_delete_inode(struct inode *); 468 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end, 469 int datasync); 470 471 /* ioctl.c */ 472 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 473 474 /* options.c */ 475 int hfsplus_parse_options(char *, struct hfsplus_sb_info *); 476 int hfsplus_parse_options_remount(char *input, int *force); 477 void hfsplus_fill_defaults(struct hfsplus_sb_info *); 478 int hfsplus_show_options(struct seq_file *, struct dentry *); 479 480 /* super.c */ 481 struct inode *hfsplus_iget(struct super_block *, unsigned long); 482 void hfsplus_mark_mdb_dirty(struct super_block *sb); 483 484 /* tables.c */ 485 extern u16 hfsplus_case_fold_table[]; 486 extern u16 hfsplus_decompose_table[]; 487 extern u16 hfsplus_compose_table[]; 488 489 /* unicode.c */ 490 int hfsplus_strcasecmp(const struct hfsplus_unistr *, 491 const struct hfsplus_unistr *); 492 int hfsplus_strcmp(const struct hfsplus_unistr *, 493 const struct hfsplus_unistr *); 494 int hfsplus_uni2asc(struct super_block *, 495 const struct hfsplus_unistr *, char *, int *); 496 int hfsplus_asc2uni(struct super_block *, 497 struct hfsplus_unistr *, int, const char *, int); 498 int hfsplus_hash_dentry(const struct dentry *dentry, 499 const struct inode *inode, struct qstr *str); 500 int hfsplus_compare_dentry(const struct dentry *parent, 501 const struct inode *pinode, 502 const struct dentry *dentry, const struct inode *inode, 503 unsigned int len, const char *str, const struct qstr *name); 504 505 /* wrapper.c */ 506 int hfsplus_read_wrapper(struct super_block *); 507 int hfs_part_find(struct super_block *, sector_t *, sector_t *); 508 int hfsplus_submit_bio(struct super_block *sb, sector_t sector, 509 void *buf, void **data, int rw); 510 511 /* time macros */ 512 #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U) 513 #define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U)) 514 515 /* compatibility */ 516 #define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) } 517 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec) 518 #define hfsp_now2mt() __hfsp_ut2mt(get_seconds()) 519 520 #endif 521