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