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TOMOYO Linux Cross Reference
Linux/fs/hfsplus/hfsplus_fs.h

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  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 #ifdef pr_fmt
 14 #undef pr_fmt
 15 #endif
 16 
 17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 18 
 19 #include <linux/fs.h>
 20 #include <linux/mutex.h>
 21 #include <linux/buffer_head.h>
 22 #include <linux/blkdev.h>
 23 #include "hfsplus_raw.h"
 24 
 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
 34 
 35 #if 0
 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)
 39 #endif
 40 #define DBG_MASK        (0)
 41 
 42 #define hfs_dbg(flg, fmt, ...)                                  \
 43 do {                                                            \
 44         if (DBG_##flg & DBG_MASK)                               \
 45                 printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);  \
 46 } while (0)
 47 
 48 #define hfs_dbg_cont(flg, fmt, ...)                             \
 49 do {                                                            \
 50         if (DBG_##flg & DBG_MASK)                               \
 51                 pr_cont(fmt, ##__VA_ARGS__);                    \
 52 } while (0)
 53 
 54 /* Runtime config options */
 55 #define HFSPLUS_DEF_CR_TYPE    0x3F3F3F3F  /* '????' */
 56 
 57 #define HFSPLUS_TYPE_DATA 0x00
 58 #define HFSPLUS_TYPE_RSRC 0xFF
 59 
 60 typedef int (*btree_keycmp)(const hfsplus_btree_key *,
 61                 const hfsplus_btree_key *);
 62 
 63 #define NODE_HASH_SIZE  256
 64 
 65 /* B-tree mutex nested subclasses */
 66 enum hfsplus_btree_mutex_classes {
 67         CATALOG_BTREE_MUTEX,
 68         EXTENTS_BTREE_MUTEX,
 69         ATTR_BTREE_MUTEX,
 70 };
 71 
 72 /* An HFS+ BTree held in memory */
 73 struct hfs_btree {
 74         struct super_block *sb;
 75         struct inode *inode;
 76         btree_keycmp keycmp;
 77 
 78         u32 cnid;
 79         u32 root;
 80         u32 leaf_count;
 81         u32 leaf_head;
 82         u32 leaf_tail;
 83         u32 node_count;
 84         u32 free_nodes;
 85         u32 attributes;
 86 
 87         unsigned int node_size;
 88         unsigned int node_size_shift;
 89         unsigned int max_key_len;
 90         unsigned int depth;
 91 
 92         struct mutex tree_lock;
 93 
 94         unsigned int pages_per_bnode;
 95         spinlock_t hash_lock;
 96         struct hfs_bnode *node_hash[NODE_HASH_SIZE];
 97         int node_hash_cnt;
 98 };
 99 
100 struct page;
101 
102 /* An HFS+ BTree node in memory */
103 struct hfs_bnode {
104         struct hfs_btree *tree;
105 
106         u32 prev;
107         u32 this;
108         u32 next;
109         u32 parent;
110 
111         u16 num_recs;
112         u8 type;
113         u8 height;
114 
115         struct hfs_bnode *next_hash;
116         unsigned long flags;
117         wait_queue_head_t lock_wq;
118         atomic_t refcnt;
119         unsigned int page_offset;
120         struct page *page[0];
121 };
122 
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
128 
129 /*
130  * Attributes file states
131  */
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
136 
137 /*
138  * HFS+ superblock info (built from Volume Header on disk)
139  */
140 
141 struct hfsplus_vh;
142 struct hfs_btree;
143 
144 struct hfsplus_sb_info {
145         void *s_vhdr_buf;
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;
156 
157         /* Runtime variables */
158         u32 blockoffset;
159         sector_t part_start;
160         sector_t sect_count;
161         int fs_shift;
162 
163         /* immutable data from the volume header */
164         u32 alloc_blksz;
165         int alloc_blksz_shift;
166         u32 total_blocks;
167         u32 data_clump_blocks, rsrc_clump_blocks;
168 
169         /* mutable data from the volume header, protected by alloc_mutex */
170         u32 free_blocks;
171         struct mutex alloc_mutex;
172 
173         /* mutable data from the volume header, protected by vh_mutex */
174         u32 next_cnid;
175         u32 file_count;
176         u32 folder_count;
177         struct mutex vh_mutex;
178 
179         /* Config options */
180         u32 creator;
181         u32 type;
182 
183         umode_t umask;
184         kuid_t uid;
185         kgid_t gid;
186 
187         int part, session;
188         unsigned long flags;
189 
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 */
193 };
194 
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
201 
202 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
203 {
204         return sb->s_fs_info;
205 }
206 
207 
208 struct hfsplus_inode_info {
209         atomic_t opencnt;
210 
211         /*
212          * Extent allocation information, protected by extents_lock.
213          */
214         u32 first_blocks;
215         u32 clump_blocks;
216         u32 alloc_blocks;
217         u32 cached_start;
218         u32 cached_blocks;
219         hfsplus_extent_rec first_extents;
220         hfsplus_extent_rec cached_extents;
221         unsigned int extent_state;
222         struct mutex extents_lock;
223 
224         /*
225          * Immutable data.
226          */
227         struct inode *rsrc_inode;
228         __be32 create_date;
229 
230         /*
231          * Protected by sbi->vh_mutex.
232          */
233         u32 linkid;
234 
235         /*
236          * Accessed using atomic bitops.
237          */
238         unsigned long flags;
239 
240         /*
241          * Protected by i_mutex.
242          */
243         sector_t fs_blocks;
244         u8 userflags;           /* BSD user file flags */
245         struct list_head open_dir_list;
246         loff_t phys_size;
247 
248         struct inode vfs_inode;
249 };
250 
251 #define HFSPLUS_EXT_DIRTY       0x0001
252 #define HFSPLUS_EXT_NEW         0x0002
253 
254 #define HFSPLUS_I_RSRC          0       /* represents a resource fork */
255 #define HFSPLUS_I_CAT_DIRTY     1       /* has changes in the catalog tree */
256 #define HFSPLUS_I_EXT_DIRTY     2       /* has changes in the extent tree */
257 #define HFSPLUS_I_ALLOC_DIRTY   3       /* has changes in the allocation file */
258 #define HFSPLUS_I_ATTR_DIRTY    4       /* has changes in the attributes tree */
259 
260 #define HFSPLUS_IS_RSRC(inode) \
261         test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)
262 
263 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
264 {
265         return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
266 }
267 
268 /*
269  * Mark an inode dirty, and also mark the btree in which the
270  * specific type of metadata is stored.
271  * For data or metadata that gets written back by into the catalog btree
272  * by hfsplus_write_inode a plain mark_inode_dirty call is enough.
273  */
274 static inline void hfsplus_mark_inode_dirty(struct inode *inode,
275                 unsigned int flag)
276 {
277         set_bit(flag, &HFSPLUS_I(inode)->flags);
278         mark_inode_dirty(inode);
279 }
280 
281 struct hfs_find_data {
282         /* filled by caller */
283         hfsplus_btree_key *search_key;
284         hfsplus_btree_key *key;
285         /* filled by find */
286         struct hfs_btree *tree;
287         struct hfs_bnode *bnode;
288         /* filled by findrec */
289         int record;
290         int keyoffset, keylength;
291         int entryoffset, entrylength;
292 };
293 
294 struct hfsplus_readdir_data {
295         struct list_head list;
296         struct file *file;
297         struct hfsplus_cat_key key;
298 };
299 
300 /*
301  * Find minimum acceptible I/O size for an hfsplus sb.
302  */
303 static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
304 {
305         return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev),
306                      HFSPLUS_SECTOR_SIZE);
307 }
308 
309 #define hfs_btree_open hfsplus_btree_open
310 #define hfs_btree_close hfsplus_btree_close
311 #define hfs_btree_write hfsplus_btree_write
312 #define hfs_bmap_alloc hfsplus_bmap_alloc
313 #define hfs_bmap_free hfsplus_bmap_free
314 #define hfs_bnode_read hfsplus_bnode_read
315 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16
316 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8
317 #define hfs_bnode_read_key hfsplus_bnode_read_key
318 #define hfs_bnode_write hfsplus_bnode_write
319 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16
320 #define hfs_bnode_clear hfsplus_bnode_clear
321 #define hfs_bnode_copy hfsplus_bnode_copy
322 #define hfs_bnode_move hfsplus_bnode_move
323 #define hfs_bnode_dump hfsplus_bnode_dump
324 #define hfs_bnode_unlink hfsplus_bnode_unlink
325 #define hfs_bnode_findhash hfsplus_bnode_findhash
326 #define hfs_bnode_find hfsplus_bnode_find
327 #define hfs_bnode_unhash hfsplus_bnode_unhash
328 #define hfs_bnode_free hfsplus_bnode_free
329 #define hfs_bnode_create hfsplus_bnode_create
330 #define hfs_bnode_get hfsplus_bnode_get
331 #define hfs_bnode_put hfsplus_bnode_put
332 #define hfs_brec_lenoff hfsplus_brec_lenoff
333 #define hfs_brec_keylen hfsplus_brec_keylen
334 #define hfs_brec_insert hfsplus_brec_insert
335 #define hfs_brec_remove hfsplus_brec_remove
336 #define hfs_find_init hfsplus_find_init
337 #define hfs_find_exit hfsplus_find_exit
338 #define __hfs_brec_find __hfsplus_brec_find
339 #define hfs_brec_find hfsplus_brec_find
340 #define hfs_brec_read hfsplus_brec_read
341 #define hfs_brec_goto hfsplus_brec_goto
342 #define hfs_part_find hfsplus_part_find
343 
344 /*
345  * definitions for ext2 flag ioctls (linux really needs a generic
346  * interface for this).
347  */
348 
349 /* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
350  * chattr/lsattr */
351 #define HFSPLUS_IOC_EXT2_GETFLAGS       FS_IOC_GETFLAGS
352 #define HFSPLUS_IOC_EXT2_SETFLAGS       FS_IOC_SETFLAGS
353 
354 
355 /*
356  * hfs+-specific ioctl for making the filesystem bootable
357  */
358 #define HFSPLUS_IOC_BLESS _IO('h', 0x80)
359 
360 typedef int (*search_strategy_t)(struct hfs_bnode *,
361                                 struct hfs_find_data *,
362                                 int *, int *, int *);
363 
364 /*
365  * Functions in any *.c used in other files
366  */
367 
368 /* attributes.c */
369 int hfsplus_create_attr_tree_cache(void);
370 void hfsplus_destroy_attr_tree_cache(void);
371 hfsplus_attr_entry *hfsplus_alloc_attr_entry(void);
372 void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry_p);
373 int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *,
374                 const hfsplus_btree_key *);
375 int hfsplus_attr_build_key(struct super_block *, hfsplus_btree_key *,
376                         u32, const char *);
377 void hfsplus_attr_build_key_uni(hfsplus_btree_key *key,
378                                         u32 cnid,
379                                         struct hfsplus_attr_unistr *name);
380 int hfsplus_find_attr(struct super_block *, u32,
381                         const char *, struct hfs_find_data *);
382 int hfsplus_attr_exists(struct inode *inode, const char *name);
383 int hfsplus_create_attr(struct inode *, const char *, const void *, size_t);
384 int hfsplus_delete_attr(struct inode *, const char *);
385 int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid);
386 
387 /* bitmap.c */
388 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
389 int hfsplus_block_free(struct super_block *, u32, u32);
390 
391 /* btree.c */
392 u32 hfsplus_calc_btree_clump_size(u32, u32, u64, int);
393 struct hfs_btree *hfs_btree_open(struct super_block *, u32);
394 void hfs_btree_close(struct hfs_btree *);
395 int hfs_btree_write(struct hfs_btree *);
396 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
397 void hfs_bmap_free(struct hfs_bnode *);
398 
399 /* bnode.c */
400 void hfs_bnode_read(struct hfs_bnode *, void *, int, int);
401 u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
402 u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
403 void hfs_bnode_read_key(struct hfs_bnode *, void *, int);
404 void hfs_bnode_write(struct hfs_bnode *, void *, int, int);
405 void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
406 void hfs_bnode_clear(struct hfs_bnode *, int, int);
407 void hfs_bnode_copy(struct hfs_bnode *, int,
408                     struct hfs_bnode *, int, int);
409 void hfs_bnode_move(struct hfs_bnode *, int, int, int);
410 void hfs_bnode_dump(struct hfs_bnode *);
411 void hfs_bnode_unlink(struct hfs_bnode *);
412 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32);
413 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32);
414 void hfs_bnode_unhash(struct hfs_bnode *);
415 void hfs_bnode_free(struct hfs_bnode *);
416 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32);
417 void hfs_bnode_get(struct hfs_bnode *);
418 void hfs_bnode_put(struct hfs_bnode *);
419 
420 /* brec.c */
421 u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *);
422 u16 hfs_brec_keylen(struct hfs_bnode *, u16);
423 int hfs_brec_insert(struct hfs_find_data *, void *, int);
424 int hfs_brec_remove(struct hfs_find_data *);
425 
426 /* bfind.c */
427 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
428 void hfs_find_exit(struct hfs_find_data *);
429 int hfs_find_1st_rec_by_cnid(struct hfs_bnode *,
430                                 struct hfs_find_data *,
431                                 int *, int *, int *);
432 int hfs_find_rec_by_key(struct hfs_bnode *,
433                                 struct hfs_find_data *,
434                                 int *, int *, int *);
435 int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *,
436                                 search_strategy_t);
437 int hfs_brec_find(struct hfs_find_data *, search_strategy_t);
438 int hfs_brec_read(struct hfs_find_data *, void *, int);
439 int hfs_brec_goto(struct hfs_find_data *, int);
440 
441 /* catalog.c */
442 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *,
443                 const hfsplus_btree_key *);
444 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *,
445                 const hfsplus_btree_key *);
446 void hfsplus_cat_build_key(struct super_block *sb,
447                 hfsplus_btree_key *, u32, struct qstr *);
448 int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *);
449 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
450 int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
451 int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
452                        struct inode *, struct qstr *);
453 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms);
454 
455 /* dir.c */
456 extern const struct inode_operations hfsplus_dir_inode_operations;
457 extern const struct file_operations hfsplus_dir_operations;
458 
459 /* extents.c */
460 int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
461 int hfsplus_ext_write_extent(struct inode *);
462 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
463 int hfsplus_free_fork(struct super_block *, u32,
464                 struct hfsplus_fork_raw *, int);
465 int hfsplus_file_extend(struct inode *);
466 void hfsplus_file_truncate(struct inode *);
467 
468 /* inode.c */
469 extern const struct address_space_operations hfsplus_aops;
470 extern const struct address_space_operations hfsplus_btree_aops;
471 extern const struct dentry_operations hfsplus_dentry_operations;
472 
473 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
474 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
475 int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
476 int hfsplus_cat_write_inode(struct inode *);
477 struct inode *hfsplus_new_inode(struct super_block *, umode_t);
478 void hfsplus_delete_inode(struct inode *);
479 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
480                        int datasync);
481 
482 /* ioctl.c */
483 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
484 
485 /* options.c */
486 int hfsplus_parse_options(char *, struct hfsplus_sb_info *);
487 int hfsplus_parse_options_remount(char *input, int *force);
488 void hfsplus_fill_defaults(struct hfsplus_sb_info *);
489 int hfsplus_show_options(struct seq_file *, struct dentry *);
490 
491 /* super.c */
492 struct inode *hfsplus_iget(struct super_block *, unsigned long);
493 void hfsplus_mark_mdb_dirty(struct super_block *sb);
494 
495 /* tables.c */
496 extern u16 hfsplus_case_fold_table[];
497 extern u16 hfsplus_decompose_table[];
498 extern u16 hfsplus_compose_table[];
499 
500 /* unicode.c */
501 int hfsplus_strcasecmp(const struct hfsplus_unistr *,
502                 const struct hfsplus_unistr *);
503 int hfsplus_strcmp(const struct hfsplus_unistr *,
504                 const struct hfsplus_unistr *);
505 int hfsplus_uni2asc(struct super_block *,
506                 const struct hfsplus_unistr *, char *, int *);
507 int hfsplus_asc2uni(struct super_block *,
508                 struct hfsplus_unistr *, int, const char *, int);
509 int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str);
510 int hfsplus_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
511                 unsigned int len, const char *str, const struct qstr *name);
512 
513 /* wrapper.c */
514 int hfsplus_read_wrapper(struct super_block *);
515 int hfs_part_find(struct super_block *, sector_t *, sector_t *);
516 int hfsplus_submit_bio(struct super_block *sb, sector_t sector,
517                 void *buf, void **data, int rw);
518 
519 /* time macros */
520 #define __hfsp_mt2ut(t)         (be32_to_cpu(t) - 2082844800U)
521 #define __hfsp_ut2mt(t)         (cpu_to_be32(t + 2082844800U))
522 
523 /* compatibility */
524 #define hfsp_mt2ut(t)           (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
525 #define hfsp_ut2mt(t)           __hfsp_ut2mt((t).tv_sec)
526 #define hfsp_now2mt()           __hfsp_ut2mt(get_seconds())
527 
528 #endif
529 

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