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