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/buffer_head.h> 15 #include "hfsplus_raw.h" 16 17 #define DBG_BNODE_REFS 0x00000001 18 #define DBG_BNODE_MOD 0x00000002 19 #define DBG_CAT_MOD 0x00000004 20 #define DBG_INODE 0x00000008 21 #define DBG_SUPER 0x00000010 22 #define DBG_EXTENT 0x00000020 23 #define DBG_BITMAP 0x00000040 24 25 //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD) 26 //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) 27 //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) 28 #define DBG_MASK (0) 29 30 #define dprint(flg, fmt, args...) \ 31 if (flg & DBG_MASK) printk(fmt , ## args) 32 33 /* Runtime config options */ 34 #define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */ 35 36 #define HFSPLUS_TYPE_DATA 0x00 37 #define HFSPLUS_TYPE_RSRC 0xFF 38 39 typedef int (*btree_keycmp)(hfsplus_btree_key *, hfsplus_btree_key *); 40 41 #define NODE_HASH_SIZE 256 42 43 /* An HFS+ BTree held in memory */ 44 struct hfs_btree { 45 struct super_block *sb; 46 struct inode *inode; 47 btree_keycmp keycmp; 48 49 u32 cnid; 50 u32 root; 51 u32 leaf_count; 52 u32 leaf_head; 53 u32 leaf_tail; 54 u32 node_count; 55 u32 free_nodes; 56 u32 attributes; 57 58 unsigned int node_size; 59 unsigned int node_size_shift; 60 unsigned int max_key_len; 61 unsigned int depth; 62 63 //unsigned int map1_size, map_size; 64 struct semaphore tree_lock; 65 66 unsigned int pages_per_bnode; 67 spinlock_t hash_lock; 68 struct hfs_bnode *node_hash[NODE_HASH_SIZE]; 69 int node_hash_cnt; 70 }; 71 72 struct page; 73 74 /* An HFS+ BTree node in memory */ 75 struct hfs_bnode { 76 struct hfs_btree *tree; 77 78 u32 prev; 79 u32 this; 80 u32 next; 81 u32 parent; 82 83 u16 num_recs; 84 u8 type; 85 u8 height; 86 87 struct hfs_bnode *next_hash; 88 unsigned long flags; 89 wait_queue_head_t lock_wq; 90 atomic_t refcnt; 91 unsigned int page_offset; 92 struct page *page[0]; 93 }; 94 95 #define HFS_BNODE_LOCK 0 96 #define HFS_BNODE_ERROR 1 97 #define HFS_BNODE_NEW 2 98 #define HFS_BNODE_DIRTY 3 99 #define HFS_BNODE_DELETED 4 100 101 /* 102 * HFS+ superblock info (built from Volume Header on disk) 103 */ 104 105 struct hfsplus_vh; 106 struct hfs_btree; 107 108 struct hfsplus_sb_info { 109 struct buffer_head *s_vhbh; 110 struct hfsplus_vh *s_vhdr; 111 struct hfs_btree *ext_tree; 112 struct hfs_btree *cat_tree; 113 struct hfs_btree *attr_tree; 114 struct inode *alloc_file; 115 struct inode *hidden_dir; 116 struct nls_table *nls; 117 118 /* Runtime variables */ 119 u32 blockoffset; 120 u32 sect_count; 121 int fs_shift; 122 123 /* Stuff in host order from Vol Header */ 124 u32 alloc_blksz; 125 int alloc_blksz_shift; 126 u32 total_blocks; 127 u32 free_blocks; 128 u32 next_alloc; 129 u32 next_cnid; 130 u32 file_count; 131 u32 folder_count; 132 u32 data_clump_blocks, rsrc_clump_blocks; 133 134 /* Config options */ 135 u32 creator; 136 u32 type; 137 138 umode_t umask; 139 uid_t uid; 140 gid_t gid; 141 142 int part, session; 143 144 unsigned long flags; 145 146 atomic_t inode_cnt; 147 u32 last_inode_cnt; 148 149 struct hlist_head rsrc_inodes; 150 }; 151 152 #define HFSPLUS_SB_WRITEBACKUP 0x0001 153 #define HFSPLUS_SB_NODECOMPOSE 0x0002 154 #define HFSPLUS_SB_FORCE 0x0004 155 156 157 struct hfsplus_inode_info { 158 struct semaphore extents_lock; 159 u32 clump_blocks, alloc_blocks; 160 sector_t fs_blocks; 161 /* Allocation extents from catalog record or volume header */ 162 hfsplus_extent_rec first_extents; 163 u32 first_blocks; 164 hfsplus_extent_rec cached_extents; 165 u32 cached_start, cached_blocks; 166 atomic_t opencnt; 167 168 struct inode *rsrc_inode; 169 unsigned long flags; 170 171 /* Device number in hfsplus_permissions in catalog */ 172 u32 dev; 173 /* BSD system and user file flags */ 174 u8 rootflags; 175 u8 userflags; 176 177 struct list_head open_dir_list; 178 loff_t phys_size; 179 struct inode vfs_inode; 180 }; 181 182 #define HFSPLUS_FLG_RSRC 0x0001 183 #define HFSPLUS_FLG_EXT_DIRTY 0x0002 184 #define HFSPLUS_FLG_EXT_NEW 0x0004 185 186 #define HFSPLUS_IS_DATA(inode) (!(HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC)) 187 #define HFSPLUS_IS_RSRC(inode) (HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC) 188 189 struct hfs_find_data { 190 /* filled by caller */ 191 hfsplus_btree_key *search_key; 192 hfsplus_btree_key *key; 193 /* filled by find */ 194 struct hfs_btree *tree; 195 struct hfs_bnode *bnode; 196 /* filled by findrec */ 197 int record; 198 int keyoffset, keylength; 199 int entryoffset, entrylength; 200 }; 201 202 struct hfsplus_readdir_data { 203 struct list_head list; 204 struct file *file; 205 struct hfsplus_cat_key key; 206 }; 207 208 #define hfs_btree_open hfsplus_btree_open 209 #define hfs_btree_close hfsplus_btree_close 210 #define hfs_btree_write hfsplus_btree_write 211 #define hfs_bmap_alloc hfsplus_bmap_alloc 212 #define hfs_bmap_free hfsplus_bmap_free 213 #define hfs_bnode_read hfsplus_bnode_read 214 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16 215 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8 216 #define hfs_bnode_read_key hfsplus_bnode_read_key 217 #define hfs_bnode_write hfsplus_bnode_write 218 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16 219 #define hfs_bnode_clear hfsplus_bnode_clear 220 #define hfs_bnode_copy hfsplus_bnode_copy 221 #define hfs_bnode_move hfsplus_bnode_move 222 #define hfs_bnode_dump hfsplus_bnode_dump 223 #define hfs_bnode_unlink hfsplus_bnode_unlink 224 #define hfs_bnode_findhash hfsplus_bnode_findhash 225 #define hfs_bnode_find hfsplus_bnode_find 226 #define hfs_bnode_unhash hfsplus_bnode_unhash 227 #define hfs_bnode_free hfsplus_bnode_free 228 #define hfs_bnode_create hfsplus_bnode_create 229 #define hfs_bnode_get hfsplus_bnode_get 230 #define hfs_bnode_put hfsplus_bnode_put 231 #define hfs_brec_lenoff hfsplus_brec_lenoff 232 #define hfs_brec_keylen hfsplus_brec_keylen 233 #define hfs_brec_insert hfsplus_brec_insert 234 #define hfs_brec_remove hfsplus_brec_remove 235 #define hfs_find_init hfsplus_find_init 236 #define hfs_find_exit hfsplus_find_exit 237 #define __hfs_brec_find __hplusfs_brec_find 238 #define hfs_brec_find hfsplus_brec_find 239 #define hfs_brec_read hfsplus_brec_read 240 #define hfs_brec_goto hfsplus_brec_goto 241 #define hfs_part_find hfsplus_part_find 242 243 /* 244 * definitions for ext2 flag ioctls (linux really needs a generic 245 * interface for this). 246 */ 247 248 /* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support 249 * chattr/lsattr */ 250 #define HFSPLUS_IOC_EXT2_GETFLAGS _IOR('f', 1, long) 251 #define HFSPLUS_IOC_EXT2_SETFLAGS _IOW('f', 2, long) 252 253 #define EXT2_FLAG_IMMUTABLE 0x00000010 /* Immutable file */ 254 #define EXT2_FLAG_APPEND 0x00000020 /* writes to file may only append */ 255 #define EXT2_FLAG_NODUMP 0x00000040 /* do not dump file */ 256 257 258 /* 259 * Functions in any *.c used in other files 260 */ 261 262 /* bitmap.c */ 263 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *); 264 int hfsplus_block_free(struct super_block *, u32, u32); 265 266 /* btree.c */ 267 struct hfs_btree *hfs_btree_open(struct super_block *, u32); 268 void hfs_btree_close(struct hfs_btree *); 269 void hfs_btree_write(struct hfs_btree *); 270 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *); 271 void hfs_bmap_free(struct hfs_bnode *); 272 273 /* bnode.c */ 274 void hfs_bnode_read(struct hfs_bnode *, void *, int, int); 275 u16 hfs_bnode_read_u16(struct hfs_bnode *, int); 276 u8 hfs_bnode_read_u8(struct hfs_bnode *, int); 277 void hfs_bnode_read_key(struct hfs_bnode *, void *, int); 278 void hfs_bnode_write(struct hfs_bnode *, void *, int, int); 279 void hfs_bnode_write_u16(struct hfs_bnode *, int, u16); 280 void hfs_bnode_clear(struct hfs_bnode *, int, int); 281 void hfs_bnode_copy(struct hfs_bnode *, int, 282 struct hfs_bnode *, int, int); 283 void hfs_bnode_move(struct hfs_bnode *, int, int, int); 284 void hfs_bnode_dump(struct hfs_bnode *); 285 void hfs_bnode_unlink(struct hfs_bnode *); 286 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32); 287 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32); 288 void hfs_bnode_unhash(struct hfs_bnode *); 289 void hfs_bnode_free(struct hfs_bnode *); 290 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32); 291 void hfs_bnode_get(struct hfs_bnode *); 292 void hfs_bnode_put(struct hfs_bnode *); 293 294 /* brec.c */ 295 u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *); 296 u16 hfs_brec_keylen(struct hfs_bnode *, u16); 297 int hfs_brec_insert(struct hfs_find_data *, void *, int); 298 int hfs_brec_remove(struct hfs_find_data *); 299 300 /* bfind.c */ 301 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *); 302 void hfs_find_exit(struct hfs_find_data *); 303 int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *); 304 int hfs_brec_find(struct hfs_find_data *); 305 int hfs_brec_read(struct hfs_find_data *, void *, int); 306 int hfs_brec_goto(struct hfs_find_data *, int); 307 308 /* catalog.c */ 309 int hfsplus_cat_cmp_key(hfsplus_btree_key *, hfsplus_btree_key *); 310 void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *, u32, struct qstr *); 311 int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *); 312 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *); 313 int hfsplus_delete_cat(u32, struct inode *, struct qstr *); 314 int hfsplus_rename_cat(u32, struct inode *, struct qstr *, 315 struct inode *, struct qstr *); 316 317 /* extents.c */ 318 int hfsplus_ext_cmp_key(hfsplus_btree_key *, hfsplus_btree_key *); 319 void hfsplus_ext_write_extent(struct inode *); 320 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int); 321 int hfsplus_free_fork(struct super_block *, u32, struct hfsplus_fork_raw *, int); 322 int hfsplus_file_extend(struct inode *); 323 void hfsplus_file_truncate(struct inode *); 324 325 /* inode.c */ 326 extern struct address_space_operations hfsplus_aops; 327 extern struct address_space_operations hfsplus_btree_aops; 328 329 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *); 330 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *); 331 int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *); 332 int hfsplus_cat_write_inode(struct inode *); 333 struct inode *hfsplus_new_inode(struct super_block *, int); 334 void hfsplus_delete_inode(struct inode *); 335 336 /* ioctl.c */ 337 int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, 338 unsigned long arg); 339 int hfsplus_setxattr(struct dentry *dentry, const char *name, 340 const void *value, size_t size, int flags); 341 ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name, 342 void *value, size_t size); 343 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size); 344 345 /* options.c */ 346 int hfsplus_parse_options(char *, struct hfsplus_sb_info *); 347 void hfsplus_fill_defaults(struct hfsplus_sb_info *); 348 int hfsplus_show_options(struct seq_file *, struct vfsmount *); 349 350 /* tables.c */ 351 extern u16 hfsplus_case_fold_table[]; 352 extern u16 hfsplus_decompose_table[]; 353 extern u16 hfsplus_compose_table[]; 354 355 /* unicode.c */ 356 int hfsplus_unistrcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *); 357 int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *); 358 int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int); 359 360 /* wrapper.c */ 361 int hfsplus_read_wrapper(struct super_block *); 362 363 int hfs_part_find(struct super_block *, sector_t *, sector_t *); 364 365 /* access macros */ 366 /* 367 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb) 368 { 369 return sb->s_fs_info; 370 } 371 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) 372 { 373 return list_entry(inode, struct hfsplus_inode_info, vfs_inode); 374 } 375 */ 376 #define HFSPLUS_SB(super) (*(struct hfsplus_sb_info *)(super)->s_fs_info) 377 #define HFSPLUS_I(inode) (*list_entry(inode, struct hfsplus_inode_info, vfs_inode)) 378 379 #if 1 380 #define hfsplus_kmap(p) ({ struct page *__p = (p); kmap(__p); }) 381 #define hfsplus_kunmap(p) ({ struct page *__p = (p); kunmap(__p); __p; }) 382 #else 383 #define hfsplus_kmap(p) kmap(p) 384 #define hfsplus_kunmap(p) kunmap(p) 385 #endif 386 387 #define sb_bread512(sb, sec, data) ({ \ 388 struct buffer_head *__bh; \ 389 sector_t __block; \ 390 loff_t __start; \ 391 int __offset; \ 392 \ 393 __start = (loff_t)(sec) << HFSPLUS_SECTOR_SHIFT;\ 394 __block = __start >> (sb)->s_blocksize_bits; \ 395 __offset = __start & ((sb)->s_blocksize - 1); \ 396 __bh = sb_bread((sb), __block); \ 397 if (likely(__bh != NULL)) \ 398 data = (void *)(__bh->b_data + __offset);\ 399 else \ 400 data = NULL; \ 401 __bh; \ 402 }) 403 404 /* time macros */ 405 #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U) 406 #define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U)) 407 408 /* compatibility */ 409 #define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) } 410 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec) 411 #define hfsp_now2mt() __hfsp_ut2mt(get_seconds()) 412 413 #define kdev_t_to_nr(x) (x) 414 415 #endif 416