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 //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD) 27 //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) 28 //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) 29 #define DBG_MASK (0) 30 31 #define dprint(flg, fmt, args...) \ 32 if (flg & DBG_MASK) printk(fmt , ## args) 33 34 /* Runtime config options */ 35 #define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */ 36 37 #define HFSPLUS_TYPE_DATA 0x00 38 #define HFSPLUS_TYPE_RSRC 0xFF 39 40 typedef int (*btree_keycmp)(const hfsplus_btree_key *, const hfsplus_btree_key *); 41 42 #define NODE_HASH_SIZE 256 43 44 /* An HFS+ BTree held in memory */ 45 struct hfs_btree { 46 struct super_block *sb; 47 struct inode *inode; 48 btree_keycmp keycmp; 49 50 u32 cnid; 51 u32 root; 52 u32 leaf_count; 53 u32 leaf_head; 54 u32 leaf_tail; 55 u32 node_count; 56 u32 free_nodes; 57 u32 attributes; 58 59 unsigned int node_size; 60 unsigned int node_size_shift; 61 unsigned int max_key_len; 62 unsigned int depth; 63 64 //unsigned int map1_size, map_size; 65 struct mutex tree_lock; 66 67 unsigned int pages_per_bnode; 68 spinlock_t hash_lock; 69 struct hfs_bnode *node_hash[NODE_HASH_SIZE]; 70 int node_hash_cnt; 71 }; 72 73 struct page; 74 75 /* An HFS+ BTree node in memory */ 76 struct hfs_bnode { 77 struct hfs_btree *tree; 78 79 u32 prev; 80 u32 this; 81 u32 next; 82 u32 parent; 83 84 u16 num_recs; 85 u8 type; 86 u8 height; 87 88 struct hfs_bnode *next_hash; 89 unsigned long flags; 90 wait_queue_head_t lock_wq; 91 atomic_t refcnt; 92 unsigned int page_offset; 93 struct page *page[0]; 94 }; 95 96 #define HFS_BNODE_LOCK 0 97 #define HFS_BNODE_ERROR 1 98 #define HFS_BNODE_NEW 2 99 #define HFS_BNODE_DIRTY 3 100 #define HFS_BNODE_DELETED 4 101 102 /* 103 * HFS+ superblock info (built from Volume Header on disk) 104 */ 105 106 struct hfsplus_vh; 107 struct hfs_btree; 108 109 struct hfsplus_sb_info { 110 struct buffer_head *s_vhbh; 111 struct hfsplus_vh *s_vhdr; 112 struct hfs_btree *ext_tree; 113 struct hfs_btree *cat_tree; 114 struct hfs_btree *attr_tree; 115 struct inode *alloc_file; 116 struct inode *hidden_dir; 117 struct nls_table *nls; 118 119 /* Runtime variables */ 120 u32 blockoffset; 121 u32 sect_count; 122 int fs_shift; 123 124 /* immutable data from the volume header */ 125 u32 alloc_blksz; 126 int alloc_blksz_shift; 127 u32 total_blocks; 128 u32 data_clump_blocks, rsrc_clump_blocks; 129 130 /* mutable data from the volume header, protected by alloc_mutex */ 131 u32 free_blocks; 132 struct mutex alloc_mutex; 133 134 /* mutable data from the volume header, protected by vh_mutex */ 135 u32 next_cnid; 136 u32 file_count; 137 u32 folder_count; 138 struct mutex vh_mutex; 139 140 /* Config options */ 141 u32 creator; 142 u32 type; 143 144 umode_t umask; 145 uid_t uid; 146 gid_t gid; 147 148 int part, session; 149 150 unsigned long flags; 151 }; 152 153 #define HFSPLUS_SB_WRITEBACKUP 0 154 #define HFSPLUS_SB_NODECOMPOSE 1 155 #define HFSPLUS_SB_FORCE 2 156 #define HFSPLUS_SB_HFSX 3 157 #define HFSPLUS_SB_CASEFOLD 4 158 159 160 struct hfsplus_inode_info { 161 atomic_t opencnt; 162 163 /* 164 * Extent allocation information, protected by extents_lock. 165 */ 166 u32 first_blocks; 167 u32 clump_blocks; 168 u32 alloc_blocks; 169 u32 cached_start; 170 u32 cached_blocks; 171 hfsplus_extent_rec first_extents; 172 hfsplus_extent_rec cached_extents; 173 unsigned long flags; 174 struct mutex extents_lock; 175 176 /* 177 * Immutable data. 178 */ 179 struct inode *rsrc_inode; 180 __be32 create_date; 181 182 /* 183 * Protected by sbi->vh_mutex. 184 */ 185 u32 linkid; 186 187 /* 188 * Protected by i_mutex. 189 */ 190 sector_t fs_blocks; 191 u8 userflags; /* BSD user file flags */ 192 struct list_head open_dir_list; 193 loff_t phys_size; 194 195 struct inode vfs_inode; 196 }; 197 198 #define HFSPLUS_FLG_RSRC 0x0001 199 #define HFSPLUS_FLG_EXT_DIRTY 0x0002 200 #define HFSPLUS_FLG_EXT_NEW 0x0004 201 202 #define HFSPLUS_IS_DATA(inode) (!(HFSPLUS_I(inode)->flags & HFSPLUS_FLG_RSRC)) 203 #define HFSPLUS_IS_RSRC(inode) (HFSPLUS_I(inode)->flags & HFSPLUS_FLG_RSRC) 204 205 struct hfs_find_data { 206 /* filled by caller */ 207 hfsplus_btree_key *search_key; 208 hfsplus_btree_key *key; 209 /* filled by find */ 210 struct hfs_btree *tree; 211 struct hfs_bnode *bnode; 212 /* filled by findrec */ 213 int record; 214 int keyoffset, keylength; 215 int entryoffset, entrylength; 216 }; 217 218 struct hfsplus_readdir_data { 219 struct list_head list; 220 struct file *file; 221 struct hfsplus_cat_key key; 222 }; 223 224 #define hfs_btree_open hfsplus_btree_open 225 #define hfs_btree_close hfsplus_btree_close 226 #define hfs_btree_write hfsplus_btree_write 227 #define hfs_bmap_alloc hfsplus_bmap_alloc 228 #define hfs_bmap_free hfsplus_bmap_free 229 #define hfs_bnode_read hfsplus_bnode_read 230 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16 231 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8 232 #define hfs_bnode_read_key hfsplus_bnode_read_key 233 #define hfs_bnode_write hfsplus_bnode_write 234 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16 235 #define hfs_bnode_clear hfsplus_bnode_clear 236 #define hfs_bnode_copy hfsplus_bnode_copy 237 #define hfs_bnode_move hfsplus_bnode_move 238 #define hfs_bnode_dump hfsplus_bnode_dump 239 #define hfs_bnode_unlink hfsplus_bnode_unlink 240 #define hfs_bnode_findhash hfsplus_bnode_findhash 241 #define hfs_bnode_find hfsplus_bnode_find 242 #define hfs_bnode_unhash hfsplus_bnode_unhash 243 #define hfs_bnode_free hfsplus_bnode_free 244 #define hfs_bnode_create hfsplus_bnode_create 245 #define hfs_bnode_get hfsplus_bnode_get 246 #define hfs_bnode_put hfsplus_bnode_put 247 #define hfs_brec_lenoff hfsplus_brec_lenoff 248 #define hfs_brec_keylen hfsplus_brec_keylen 249 #define hfs_brec_insert hfsplus_brec_insert 250 #define hfs_brec_remove hfsplus_brec_remove 251 #define hfs_find_init hfsplus_find_init 252 #define hfs_find_exit hfsplus_find_exit 253 #define __hfs_brec_find __hplusfs_brec_find 254 #define hfs_brec_find hfsplus_brec_find 255 #define hfs_brec_read hfsplus_brec_read 256 #define hfs_brec_goto hfsplus_brec_goto 257 #define hfs_part_find hfsplus_part_find 258 259 /* 260 * definitions for ext2 flag ioctls (linux really needs a generic 261 * interface for this). 262 */ 263 264 /* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support 265 * chattr/lsattr */ 266 #define HFSPLUS_IOC_EXT2_GETFLAGS FS_IOC_GETFLAGS 267 #define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS 268 269 270 /* 271 * Functions in any *.c used in other files 272 */ 273 274 /* bitmap.c */ 275 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *); 276 int hfsplus_block_free(struct super_block *, u32, u32); 277 278 /* btree.c */ 279 struct hfs_btree *hfs_btree_open(struct super_block *, u32); 280 void hfs_btree_close(struct hfs_btree *); 281 void hfs_btree_write(struct hfs_btree *); 282 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *); 283 void hfs_bmap_free(struct hfs_bnode *); 284 285 /* bnode.c */ 286 void hfs_bnode_read(struct hfs_bnode *, void *, int, int); 287 u16 hfs_bnode_read_u16(struct hfs_bnode *, int); 288 u8 hfs_bnode_read_u8(struct hfs_bnode *, int); 289 void hfs_bnode_read_key(struct hfs_bnode *, void *, int); 290 void hfs_bnode_write(struct hfs_bnode *, void *, int, int); 291 void hfs_bnode_write_u16(struct hfs_bnode *, int, u16); 292 void hfs_bnode_clear(struct hfs_bnode *, int, int); 293 void hfs_bnode_copy(struct hfs_bnode *, int, 294 struct hfs_bnode *, int, int); 295 void hfs_bnode_move(struct hfs_bnode *, int, int, int); 296 void hfs_bnode_dump(struct hfs_bnode *); 297 void hfs_bnode_unlink(struct hfs_bnode *); 298 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32); 299 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32); 300 void hfs_bnode_unhash(struct hfs_bnode *); 301 void hfs_bnode_free(struct hfs_bnode *); 302 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32); 303 void hfs_bnode_get(struct hfs_bnode *); 304 void hfs_bnode_put(struct hfs_bnode *); 305 306 /* brec.c */ 307 u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *); 308 u16 hfs_brec_keylen(struct hfs_bnode *, u16); 309 int hfs_brec_insert(struct hfs_find_data *, void *, int); 310 int hfs_brec_remove(struct hfs_find_data *); 311 312 /* bfind.c */ 313 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *); 314 void hfs_find_exit(struct hfs_find_data *); 315 int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *); 316 int hfs_brec_find(struct hfs_find_data *); 317 int hfs_brec_read(struct hfs_find_data *, void *, int); 318 int hfs_brec_goto(struct hfs_find_data *, int); 319 320 /* catalog.c */ 321 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *); 322 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *); 323 void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *, u32, struct qstr *); 324 int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *); 325 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *); 326 int hfsplus_delete_cat(u32, struct inode *, struct qstr *); 327 int hfsplus_rename_cat(u32, struct inode *, struct qstr *, 328 struct inode *, struct qstr *); 329 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms); 330 331 /* dir.c */ 332 extern const struct inode_operations hfsplus_dir_inode_operations; 333 extern const struct file_operations hfsplus_dir_operations; 334 335 /* extents.c */ 336 int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *); 337 void hfsplus_ext_write_extent(struct inode *); 338 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int); 339 int hfsplus_free_fork(struct super_block *, u32, struct hfsplus_fork_raw *, int); 340 int hfsplus_file_extend(struct inode *); 341 void hfsplus_file_truncate(struct inode *); 342 343 /* inode.c */ 344 extern const struct address_space_operations hfsplus_aops; 345 extern const struct address_space_operations hfsplus_btree_aops; 346 extern const struct dentry_operations hfsplus_dentry_operations; 347 348 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *); 349 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *); 350 int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *); 351 int hfsplus_cat_write_inode(struct inode *); 352 struct inode *hfsplus_new_inode(struct super_block *, int); 353 void hfsplus_delete_inode(struct inode *); 354 355 /* ioctl.c */ 356 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); 357 int hfsplus_setxattr(struct dentry *dentry, const char *name, 358 const void *value, size_t size, int flags); 359 ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name, 360 void *value, size_t size); 361 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size); 362 363 /* options.c */ 364 int hfsplus_parse_options(char *, struct hfsplus_sb_info *); 365 void hfsplus_fill_defaults(struct hfsplus_sb_info *); 366 int hfsplus_show_options(struct seq_file *, struct vfsmount *); 367 368 /* super.c */ 369 struct inode *hfsplus_iget(struct super_block *, unsigned long); 370 int hfsplus_sync_fs(struct super_block *sb, int wait); 371 372 /* tables.c */ 373 extern u16 hfsplus_case_fold_table[]; 374 extern u16 hfsplus_decompose_table[]; 375 extern u16 hfsplus_compose_table[]; 376 377 /* unicode.c */ 378 int hfsplus_strcasecmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *); 379 int hfsplus_strcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *); 380 int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *); 381 int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int); 382 int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str); 383 int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2); 384 385 /* wrapper.c */ 386 int hfsplus_read_wrapper(struct super_block *); 387 388 int hfs_part_find(struct super_block *, sector_t *, sector_t *); 389 390 /* access macros */ 391 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb) 392 { 393 return sb->s_fs_info; 394 } 395 396 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) 397 { 398 return list_entry(inode, struct hfsplus_inode_info, vfs_inode); 399 } 400 401 #define sb_bread512(sb, sec, data) ({ \ 402 struct buffer_head *__bh; \ 403 sector_t __block; \ 404 loff_t __start; \ 405 int __offset; \ 406 \ 407 __start = (loff_t)(sec) << HFSPLUS_SECTOR_SHIFT;\ 408 __block = __start >> (sb)->s_blocksize_bits; \ 409 __offset = __start & ((sb)->s_blocksize - 1); \ 410 __bh = sb_bread((sb), __block); \ 411 if (likely(__bh != NULL)) \ 412 data = (void *)(__bh->b_data + __offset);\ 413 else \ 414 data = NULL; \ 415 __bh; \ 416 }) 417 418 /* time macros */ 419 #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U) 420 #define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U)) 421 422 /* compatibility */ 423 #define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) } 424 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec) 425 #define hfsp_now2mt() __hfsp_ut2mt(get_seconds()) 426 427 #endif 428