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)(const hfsplus_btree_key *, const 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 struct hlist_head rsrc_inodes;
147 };
148
149 #define HFSPLUS_SB_WRITEBACKUP 0x0001
150 #define HFSPLUS_SB_NODECOMPOSE 0x0002
151 #define HFSPLUS_SB_FORCE 0x0004
152 #define HFSPLUS_SB_HFSX 0x0008
153 #define HFSPLUS_SB_CASEFOLD 0x0010
154
155
156 struct hfsplus_inode_info {
157 struct semaphore extents_lock;
158 u32 clump_blocks, alloc_blocks;
159 sector_t fs_blocks;
160 /* Allocation extents from catalog record or volume header */
161 hfsplus_extent_rec first_extents;
162 u32 first_blocks;
163 hfsplus_extent_rec cached_extents;
164 u32 cached_start, cached_blocks;
165 atomic_t opencnt;
166
167 struct inode *rsrc_inode;
168 unsigned long flags;
169
170 __be32 create_date;
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 FS_IOC_GETFLAGS
251 #define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS
252
253
254 /*
255 * Functions in any *.c used in other files
256 */
257
258 /* bitmap.c */
259 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
260 int hfsplus_block_free(struct super_block *, u32, u32);
261
262 /* btree.c */
263 struct hfs_btree *hfs_btree_open(struct super_block *, u32);
264 void hfs_btree_close(struct hfs_btree *);
265 void hfs_btree_write(struct hfs_btree *);
266 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
267 void hfs_bmap_free(struct hfs_bnode *);
268
269 /* bnode.c */
270 void hfs_bnode_read(struct hfs_bnode *, void *, int, int);
271 u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
272 u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
273 void hfs_bnode_read_key(struct hfs_bnode *, void *, int);
274 void hfs_bnode_write(struct hfs_bnode *, void *, int, int);
275 void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
276 void hfs_bnode_clear(struct hfs_bnode *, int, int);
277 void hfs_bnode_copy(struct hfs_bnode *, int,
278 struct hfs_bnode *, int, int);
279 void hfs_bnode_move(struct hfs_bnode *, int, int, int);
280 void hfs_bnode_dump(struct hfs_bnode *);
281 void hfs_bnode_unlink(struct hfs_bnode *);
282 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32);
283 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32);
284 void hfs_bnode_unhash(struct hfs_bnode *);
285 void hfs_bnode_free(struct hfs_bnode *);
286 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32);
287 void hfs_bnode_get(struct hfs_bnode *);
288 void hfs_bnode_put(struct hfs_bnode *);
289
290 /* brec.c */
291 u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *);
292 u16 hfs_brec_keylen(struct hfs_bnode *, u16);
293 int hfs_brec_insert(struct hfs_find_data *, void *, int);
294 int hfs_brec_remove(struct hfs_find_data *);
295
296 /* bfind.c */
297 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
298 void hfs_find_exit(struct hfs_find_data *);
299 int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *);
300 int hfs_brec_find(struct hfs_find_data *);
301 int hfs_brec_read(struct hfs_find_data *, void *, int);
302 int hfs_brec_goto(struct hfs_find_data *, int);
303
304 /* catalog.c */
305 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
306 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
307 void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *, u32, struct qstr *);
308 int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *);
309 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
310 int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
311 int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
312 struct inode *, struct qstr *);
313
314 /* extents.c */
315 int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
316 void hfsplus_ext_write_extent(struct inode *);
317 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
318 int hfsplus_free_fork(struct super_block *, u32, struct hfsplus_fork_raw *, int);
319 int hfsplus_file_extend(struct inode *);
320 void hfsplus_file_truncate(struct inode *);
321
322 /* inode.c */
323 extern const struct address_space_operations hfsplus_aops;
324 extern const struct address_space_operations hfsplus_btree_aops;
325 extern struct dentry_operations hfsplus_dentry_operations;
326
327 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
328 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
329 int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
330 int hfsplus_cat_write_inode(struct inode *);
331 struct inode *hfsplus_new_inode(struct super_block *, int);
332 void hfsplus_delete_inode(struct inode *);
333
334 /* ioctl.c */
335 int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
336 unsigned long arg);
337 int hfsplus_setxattr(struct dentry *dentry, const char *name,
338 const void *value, size_t size, int flags);
339 ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
340 void *value, size_t size);
341 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
342
343 /* options.c */
344 int hfsplus_parse_options(char *, struct hfsplus_sb_info *);
345 void hfsplus_fill_defaults(struct hfsplus_sb_info *);
346 int hfsplus_show_options(struct seq_file *, struct vfsmount *);
347
348 /* super.c */
349 struct inode *hfsplus_iget(struct super_block *, unsigned long);
350
351 /* tables.c */
352 extern u16 hfsplus_case_fold_table[];
353 extern u16 hfsplus_decompose_table[];
354 extern u16 hfsplus_compose_table[];
355
356 /* unicode.c */
357 int hfsplus_strcasecmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
358 int hfsplus_strcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
359 int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *);
360 int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int);
361 int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str);
362 int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2);
363
364 /* wrapper.c */
365 int hfsplus_read_wrapper(struct super_block *);
366
367 int hfs_part_find(struct super_block *, sector_t *, sector_t *);
368
369 /* access macros */
370 /*
371 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
372 {
373 return sb->s_fs_info;
374 }
375 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
376 {
377 return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
378 }
379 */
380 #define HFSPLUS_SB(super) (*(struct hfsplus_sb_info *)(super)->s_fs_info)
381 #define HFSPLUS_I(inode) (*list_entry(inode, struct hfsplus_inode_info, vfs_inode))
382
383 #if 1
384 #define hfsplus_kmap(p) ({ struct page *__p = (p); kmap(__p); })
385 #define hfsplus_kunmap(p) ({ struct page *__p = (p); kunmap(__p); __p; })
386 #else
387 #define hfsplus_kmap(p) kmap(p)
388 #define hfsplus_kunmap(p) kunmap(p)
389 #endif
390
391 #define sb_bread512(sb, sec, data) ({ \
392 struct buffer_head *__bh; \
393 sector_t __block; \
394 loff_t __start; \
395 int __offset; \
396 \
397 __start = (loff_t)(sec) << HFSPLUS_SECTOR_SHIFT;\
398 __block = __start >> (sb)->s_blocksize_bits; \
399 __offset = __start & ((sb)->s_blocksize - 1); \
400 __bh = sb_bread((sb), __block); \
401 if (likely(__bh != NULL)) \
402 data = (void *)(__bh->b_data + __offset);\
403 else \
404 data = NULL; \
405 __bh; \
406 })
407
408 /* time macros */
409 #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U)
410 #define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U))
411
412 /* compatibility */
413 #define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
414 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
415 #define hfsp_now2mt() __hfsp_ut2mt(get_seconds())
416
417 #define kdev_t_to_nr(x) (x)
418
419 #endif
420
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