2 * linux/include/linux/hfsplus_fs.h
5 * Brad Boyer (flar@pants.nu)
6 * (C) 2003 Ardis Technologies <roman@ardistech.com>
10 #ifndef _LINUX_HFSPLUS_FS_H
11 #define _LINUX_HFSPLUS_FS_H
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20 #include <linux/mutex.h>
21 #include <linux/buffer_head.h>
22 #include <linux/blkdev.h>
23 #include "hfsplus_raw.h"
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 #define DBG_ACL_MOD 0x00000100
36 #define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
37 #define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
38 #define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
42 #define hfs_dbg(flg, fmt, ...) \
44 if (DBG_##flg & DBG_MASK) \
45 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
48 #define hfs_dbg_cont(flg, fmt, ...) \
50 if (DBG_##flg & DBG_MASK) \
51 pr_cont(fmt, ##__VA_ARGS__); \
54 /* Runtime config options */
55 #define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */
57 #define HFSPLUS_TYPE_DATA 0x00
58 #define HFSPLUS_TYPE_RSRC 0xFF
60 typedef int (*btree_keycmp)(const hfsplus_btree_key *,
61 const hfsplus_btree_key *);
63 #define NODE_HASH_SIZE 256
65 /* B-tree mutex nested subclasses */
66 enum hfsplus_btree_mutex_classes {
72 /* An HFS+ BTree held in memory */
74 struct super_block *sb;
87 unsigned int node_size;
88 unsigned int node_size_shift;
89 unsigned int max_key_len;
92 struct mutex tree_lock;
94 unsigned int pages_per_bnode;
96 struct hfs_bnode *node_hash[NODE_HASH_SIZE];
102 /* An HFS+ BTree node in memory */
104 struct hfs_btree *tree;
115 struct hfs_bnode *next_hash;
117 wait_queue_head_t lock_wq;
119 unsigned int page_offset;
120 struct page *page[0];
123 #define HFS_BNODE_LOCK 0
124 #define HFS_BNODE_ERROR 1
125 #define HFS_BNODE_NEW 2
126 #define HFS_BNODE_DIRTY 3
127 #define HFS_BNODE_DELETED 4
130 * Attributes file states
132 #define HFSPLUS_EMPTY_ATTR_TREE 0
133 #define HFSPLUS_CREATING_ATTR_TREE 1
134 #define HFSPLUS_VALID_ATTR_TREE 2
135 #define HFSPLUS_FAILED_ATTR_TREE 3
138 * HFS+ superblock info (built from Volume Header on disk)
144 struct hfsplus_sb_info {
146 struct hfsplus_vh *s_vhdr;
147 void *s_backup_vhdr_buf;
148 struct hfsplus_vh *s_backup_vhdr;
149 struct hfs_btree *ext_tree;
150 struct hfs_btree *cat_tree;
151 struct hfs_btree *attr_tree;
152 atomic_t attr_tree_state;
153 struct inode *alloc_file;
154 struct inode *hidden_dir;
155 struct nls_table *nls;
157 /* Runtime variables */
163 /* immutable data from the volume header */
165 int alloc_blksz_shift;
167 u32 data_clump_blocks, rsrc_clump_blocks;
169 /* mutable data from the volume header, protected by alloc_mutex */
171 struct mutex alloc_mutex;
173 /* mutable data from the volume header, protected by vh_mutex */
177 struct mutex vh_mutex;
190 int work_queued; /* non-zero delayed work is queued */
191 struct delayed_work sync_work; /* FS sync delayed work */
192 spinlock_t work_lock; /* protects sync_work and work_queued */
195 #define HFSPLUS_SB_WRITEBACKUP 0
196 #define HFSPLUS_SB_NODECOMPOSE 1
197 #define HFSPLUS_SB_FORCE 2
198 #define HFSPLUS_SB_HFSX 3
199 #define HFSPLUS_SB_CASEFOLD 4
200 #define HFSPLUS_SB_NOBARRIER 5
202 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
204 return sb->s_fs_info;
208 struct hfsplus_inode_info {
212 * Extent allocation information, protected by extents_lock.
219 hfsplus_extent_rec first_extents;
220 hfsplus_extent_rec cached_extents;
221 unsigned int extent_state;
222 struct mutex extents_lock;
227 struct inode *rsrc_inode;
231 * Protected by sbi->vh_mutex.
236 * Accessed using atomic bitops.
241 * Protected by i_mutex.
244 u8 userflags; /* BSD user file flags */
245 u32 subfolders; /* Subfolder count (HFSX only) */
246 struct list_head open_dir_list;
249 struct inode vfs_inode;
252 #define HFSPLUS_EXT_DIRTY 0x0001
253 #define HFSPLUS_EXT_NEW 0x0002
255 #define HFSPLUS_I_RSRC 0 /* represents a resource fork */
256 #define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */
257 #define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */
258 #define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */
259 #define HFSPLUS_I_ATTR_DIRTY 4 /* has changes in the attributes tree */
261 #define HFSPLUS_IS_RSRC(inode) \
262 test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)
264 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
266 return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
270 * Mark an inode dirty, and also mark the btree in which the
271 * specific type of metadata is stored.
272 * For data or metadata that gets written back by into the catalog btree
273 * by hfsplus_write_inode a plain mark_inode_dirty call is enough.
275 static inline void hfsplus_mark_inode_dirty(struct inode *inode,
278 set_bit(flag, &HFSPLUS_I(inode)->flags);
279 mark_inode_dirty(inode);
282 struct hfs_find_data {
283 /* filled by caller */
284 hfsplus_btree_key *search_key;
285 hfsplus_btree_key *key;
287 struct hfs_btree *tree;
288 struct hfs_bnode *bnode;
289 /* filled by findrec */
291 int keyoffset, keylength;
292 int entryoffset, entrylength;
295 struct hfsplus_readdir_data {
296 struct list_head list;
298 struct hfsplus_cat_key key;
302 * Find minimum acceptible I/O size for an hfsplus sb.
304 static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
306 return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev),
307 HFSPLUS_SECTOR_SIZE);
310 #define hfs_btree_open hfsplus_btree_open
311 #define hfs_btree_close hfsplus_btree_close
312 #define hfs_btree_write hfsplus_btree_write
313 #define hfs_bmap_alloc hfsplus_bmap_alloc
314 #define hfs_bmap_free hfsplus_bmap_free
315 #define hfs_bnode_read hfsplus_bnode_read
316 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16
317 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8
318 #define hfs_bnode_read_key hfsplus_bnode_read_key
319 #define hfs_bnode_write hfsplus_bnode_write
320 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16
321 #define hfs_bnode_clear hfsplus_bnode_clear
322 #define hfs_bnode_copy hfsplus_bnode_copy
323 #define hfs_bnode_move hfsplus_bnode_move
324 #define hfs_bnode_dump hfsplus_bnode_dump
325 #define hfs_bnode_unlink hfsplus_bnode_unlink
326 #define hfs_bnode_findhash hfsplus_bnode_findhash
327 #define hfs_bnode_find hfsplus_bnode_find
328 #define hfs_bnode_unhash hfsplus_bnode_unhash
329 #define hfs_bnode_free hfsplus_bnode_free
330 #define hfs_bnode_create hfsplus_bnode_create
331 #define hfs_bnode_get hfsplus_bnode_get
332 #define hfs_bnode_put hfsplus_bnode_put
333 #define hfs_brec_lenoff hfsplus_brec_lenoff
334 #define hfs_brec_keylen hfsplus_brec_keylen
335 #define hfs_brec_insert hfsplus_brec_insert
336 #define hfs_brec_remove hfsplus_brec_remove
337 #define hfs_find_init hfsplus_find_init
338 #define hfs_find_exit hfsplus_find_exit
339 #define __hfs_brec_find __hfsplus_brec_find
340 #define hfs_brec_find hfsplus_brec_find
341 #define hfs_brec_read hfsplus_brec_read
342 #define hfs_brec_goto hfsplus_brec_goto
343 #define hfs_part_find hfsplus_part_find
346 * definitions for ext2 flag ioctls (linux really needs a generic
347 * interface for this).
350 /* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
352 #define HFSPLUS_IOC_EXT2_GETFLAGS FS_IOC_GETFLAGS
353 #define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS
357 * hfs+-specific ioctl for making the filesystem bootable
359 #define HFSPLUS_IOC_BLESS _IO('h', 0x80)
361 typedef int (*search_strategy_t)(struct hfs_bnode *,
362 struct hfs_find_data *,
363 int *, int *, int *);
366 * Functions in any *.c used in other files
370 int __init hfsplus_create_attr_tree_cache(void);
371 void hfsplus_destroy_attr_tree_cache(void);
372 int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *k1,
373 const hfsplus_btree_key *k2);
374 int hfsplus_attr_build_key(struct super_block *sb, hfsplus_btree_key *key,
375 u32 cnid, const char *name);
376 hfsplus_attr_entry *hfsplus_alloc_attr_entry(void);
377 void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry);
378 int hfsplus_find_attr(struct super_block *sb, u32 cnid, const char *name,
379 struct hfs_find_data *fd);
380 int hfsplus_attr_exists(struct inode *inode, const char *name);
381 int hfsplus_create_attr(struct inode *inode, const char *name,
382 const void *value, size_t size);
383 int hfsplus_delete_attr(struct inode *inode, const char *name);
384 int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid);
387 int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset,
389 int hfsplus_block_free(struct super_block *sb, u32 offset, u32 count);
392 u32 hfsplus_calc_btree_clump_size(u32 block_size, u32 node_size, u64 sectors,
394 struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id);
395 void hfs_btree_close(struct hfs_btree *tree);
396 int hfs_btree_write(struct hfs_btree *tree);
397 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *tree);
398 void hfs_bmap_free(struct hfs_bnode *node);
401 void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len);
402 u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off);
403 u8 hfs_bnode_read_u8(struct hfs_bnode *node, int off);
404 void hfs_bnode_read_key(struct hfs_bnode *node, void *key, int off);
405 void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len);
406 void hfs_bnode_write_u16(struct hfs_bnode *node, int off, u16 data);
407 void hfs_bnode_clear(struct hfs_bnode *node, int off, int len);
408 void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
409 struct hfs_bnode *src_node, int src, int len);
410 void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len);
411 void hfs_bnode_dump(struct hfs_bnode *node);
412 void hfs_bnode_unlink(struct hfs_bnode *node);
413 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *tree, u32 cnid);
414 void hfs_bnode_unhash(struct hfs_bnode *node);
415 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num);
416 void hfs_bnode_free(struct hfs_bnode *node);
417 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num);
418 void hfs_bnode_get(struct hfs_bnode *node);
419 void hfs_bnode_put(struct hfs_bnode *node);
420 bool hfs_bnode_need_zeroout(struct hfs_btree *tree);
423 u16 hfs_brec_lenoff(struct hfs_bnode *node, u16 rec, u16 *off);
424 u16 hfs_brec_keylen(struct hfs_bnode *node, u16 rec);
425 int hfs_brec_insert(struct hfs_find_data *fd, void *entry, int entry_len);
426 int hfs_brec_remove(struct hfs_find_data *fd);
429 int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd);
430 void hfs_find_exit(struct hfs_find_data *fd);
431 int hfs_find_1st_rec_by_cnid(struct hfs_bnode *bnode, struct hfs_find_data *fd,
432 int *begin, int *end, int *cur_rec);
433 int hfs_find_rec_by_key(struct hfs_bnode *bnode, struct hfs_find_data *fd,
434 int *begin, int *end, int *cur_rec);
435 int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd,
436 search_strategy_t rec_found);
437 int hfs_brec_find(struct hfs_find_data *fd, search_strategy_t do_key_compare);
438 int hfs_brec_read(struct hfs_find_data *fd, void *rec, int rec_len);
439 int hfs_brec_goto(struct hfs_find_data *fd, int cnt);
442 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *k1,
443 const hfsplus_btree_key *k2);
444 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *k1,
445 const hfsplus_btree_key *k2);
446 void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key,
447 u32 parent, struct qstr *str);
448 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms);
449 int hfsplus_find_cat(struct super_block *sb, u32 cnid,
450 struct hfs_find_data *fd);
451 int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str,
452 struct inode *inode);
453 int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str);
454 int hfsplus_rename_cat(u32 cnid, struct inode *src_dir, struct qstr *src_name,
455 struct inode *dst_dir, struct qstr *dst_name);
458 extern const struct inode_operations hfsplus_dir_inode_operations;
459 extern const struct file_operations hfsplus_dir_operations;
462 int hfsplus_ext_cmp_key(const hfsplus_btree_key *k1,
463 const hfsplus_btree_key *k2);
464 int hfsplus_ext_write_extent(struct inode *inode);
465 int hfsplus_get_block(struct inode *inode, sector_t iblock,
466 struct buffer_head *bh_result, int create);
467 int hfsplus_free_fork(struct super_block *sb, u32 cnid,
468 struct hfsplus_fork_raw *fork, int type);
469 int hfsplus_file_extend(struct inode *inode, bool zeroout);
470 void hfsplus_file_truncate(struct inode *inode);
473 extern const struct address_space_operations hfsplus_aops;
474 extern const struct address_space_operations hfsplus_btree_aops;
475 extern const struct dentry_operations hfsplus_dentry_operations;
477 struct inode *hfsplus_new_inode(struct super_block *sb, umode_t mode);
478 void hfsplus_delete_inode(struct inode *inode);
479 void hfsplus_inode_read_fork(struct inode *inode,
480 struct hfsplus_fork_raw *fork);
481 void hfsplus_inode_write_fork(struct inode *inode,
482 struct hfsplus_fork_raw *fork);
483 int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd);
484 int hfsplus_cat_write_inode(struct inode *inode);
485 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
489 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
492 void hfsplus_fill_defaults(struct hfsplus_sb_info *opts);
493 int hfsplus_parse_options_remount(char *input, int *force);
494 int hfsplus_parse_options(char *input, struct hfsplus_sb_info *sbi);
495 int hfsplus_show_options(struct seq_file *seq, struct dentry *root);
498 int hfs_part_find(struct super_block *sb, sector_t *part_start,
499 sector_t *part_size);
502 struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino);
503 void hfsplus_mark_mdb_dirty(struct super_block *sb);
506 extern u16 hfsplus_case_fold_table[];
507 extern u16 hfsplus_decompose_table[];
508 extern u16 hfsplus_compose_table[];
511 int hfsplus_strcasecmp(const struct hfsplus_unistr *s1,
512 const struct hfsplus_unistr *s2);
513 int hfsplus_strcmp(const struct hfsplus_unistr *s1,
514 const struct hfsplus_unistr *s2);
515 int hfsplus_uni2asc(struct super_block *sb, const struct hfsplus_unistr *ustr,
516 char *astr, int *len_p);
517 int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
518 int max_unistr_len, const char *astr, int len);
519 int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str);
520 int hfsplus_compare_dentry(const struct dentry *parent,
521 const struct dentry *dentry, unsigned int len,
522 const char *str, const struct qstr *name);
525 int hfsplus_submit_bio(struct super_block *sb, sector_t sector, void *buf,
526 void **data, int rw);
527 int hfsplus_read_wrapper(struct super_block *sb);
530 #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U)
531 #define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U))
534 #define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
535 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
536 #define hfsp_now2mt() __hfsp_ut2mt(get_seconds())