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/version.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)(hfsplus_btree_key *, 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 semaphore 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
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
154
155 struct hfsplus_inode_info {
156 struct semaphore extents_lock;
157 u32 clump_blocks, alloc_blocks;
158 sector_t fs_blocks;
159 /* Allocation extents from catalog record or volume header */
160 hfsplus_extent_rec first_extents;
161 u32 first_blocks;
162 hfsplus_extent_rec cached_extents;
163 u32 cached_start, cached_blocks;
164 atomic_t opencnt;
165
166 struct inode *rsrc_inode;
167 unsigned long flags;
168
169 /* Device number in hfsplus_permissions in catalog */
170 u32 dev;
171 /* BSD system and user file flags */
172 u8 rootflags;
173 u8 userflags;
174
175 struct list_head open_dir_list;
176 loff_t phys_size;
177 struct inode vfs_inode;
178 };
179
180 #define HFSPLUS_FLG_RSRC 0x0001
181 #define HFSPLUS_FLG_EXT_DIRTY 0x0002
182 #define HFSPLUS_FLG_EXT_NEW 0x0004
183
184 #define HFSPLUS_IS_DATA(inode) (!(HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC))
185 #define HFSPLUS_IS_RSRC(inode) (HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC)
186
187 struct hfs_find_data {
188 /* filled by caller */
189 hfsplus_btree_key *search_key;
190 hfsplus_btree_key *key;
191 /* filled by find */
192 struct hfs_btree *tree;
193 struct hfs_bnode *bnode;
194 /* filled by findrec */
195 int record;
196 int keyoffset, keylength;
197 int entryoffset, entrylength;
198 };
199
200 struct hfsplus_readdir_data {
201 struct list_head list;
202 struct file *file;
203 struct hfsplus_cat_key key;
204 };
205
206 #define hfs_btree_open hfsplus_btree_open
207 #define hfs_btree_close hfsplus_btree_close
208 #define hfs_btree_write hfsplus_btree_write
209 #define hfs_bmap_alloc hfsplus_bmap_alloc
210 #define hfs_bmap_free hfsplus_bmap_free
211 #define hfs_bnode_read hfsplus_bnode_read
212 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16
213 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8
214 #define hfs_bnode_read_key hfsplus_bnode_read_key
215 #define hfs_bnode_write hfsplus_bnode_write
216 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16
217 #define hfs_bnode_clear hfsplus_bnode_clear
218 #define hfs_bnode_copy hfsplus_bnode_copy
219 #define hfs_bnode_move hfsplus_bnode_move
220 #define hfs_bnode_dump hfsplus_bnode_dump
221 #define hfs_bnode_unlink hfsplus_bnode_unlink
222 #define hfs_bnode_findhash hfsplus_bnode_findhash
223 #define hfs_bnode_find hfsplus_bnode_find
224 #define hfs_bnode_unhash hfsplus_bnode_unhash
225 #define hfs_bnode_free hfsplus_bnode_free
226 #define hfs_bnode_create hfsplus_bnode_create
227 #define hfs_bnode_get hfsplus_bnode_get
228 #define hfs_bnode_put hfsplus_bnode_put
229 #define hfs_brec_lenoff hfsplus_brec_lenoff
230 #define hfs_brec_keylen hfsplus_brec_keylen
231 #define hfs_brec_insert hfsplus_brec_insert
232 #define hfs_brec_remove hfsplus_brec_remove
233 #define hfs_bnode_split hfsplus_bnode_split
234 #define hfs_brec_update_parent hfsplus_brec_update_parent
235 #define hfs_btree_inc_height hfsplus_btree_inc_height
236 #define hfs_find_init hfsplus_find_init
237 #define hfs_find_exit hfsplus_find_exit
238 #define __hfs_brec_find __hplusfs_brec_find
239 #define hfs_brec_find hfsplus_brec_find
240 #define hfs_brec_read hfsplus_brec_read
241 #define hfs_brec_goto hfsplus_brec_goto
242 #define hfs_part_find hfsplus_part_find
243
244 /*
245 * definitions for ext2 flag ioctls (linux really needs a generic
246 * interface for this).
247 */
248
249 /* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
250 * chattr/lsattr */
251 #define HFSPLUS_IOC_EXT2_GETFLAGS _IOR('f', 1, long)
252 #define HFSPLUS_IOC_EXT2_SETFLAGS _IOW('f', 2, long)
253
254 #define EXT2_FLAG_IMMUTABLE 0x00000010 /* Immutable file */
255 #define EXT2_FLAG_APPEND 0x00000020 /* writes to file may only append */
256 #define EXT2_FLAG_NODUMP 0x00000040 /* do not dump file */
257
258
259 /*
260 * Functions in any *.c used in other files
261 */
262
263 /* bitmap.c */
264 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
265 int hfsplus_block_free(struct super_block *, u32, u32);
266
267 /* btree.c */
268 struct hfs_btree *hfs_btree_open(struct super_block *, u32);
269 void hfs_btree_close(struct hfs_btree *);
270 void hfs_btree_write(struct hfs_btree *);
271 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
272 void hfs_bmap_free(struct hfs_bnode *);
273
274 /* bnode.c */
275 void hfs_bnode_read(struct hfs_bnode *, void *, int, int);
276 u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
277 u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
278 void hfs_bnode_read_key(struct hfs_bnode *, void *, int);
279 void hfs_bnode_write(struct hfs_bnode *, void *, int, int);
280 void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
281 void hfs_bnode_clear(struct hfs_bnode *, int, int);
282 void hfs_bnode_copy(struct hfs_bnode *, int,
283 struct hfs_bnode *, int, int);
284 void hfs_bnode_move(struct hfs_bnode *, int, int, int);
285 void hfs_bnode_dump(struct hfs_bnode *);
286 void hfs_bnode_unlink(struct hfs_bnode *);
287 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32);
288 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32);
289 void hfs_bnode_unhash(struct hfs_bnode *);
290 void hfs_bnode_free(struct hfs_bnode *);
291 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32);
292 void hfs_bnode_get(struct hfs_bnode *);
293 void hfs_bnode_put(struct hfs_bnode *);
294
295 /* brec.c */
296 u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *);
297 u16 hfs_brec_keylen(struct hfs_bnode *, u16);
298 int hfs_brec_insert(struct hfs_find_data *, void *, int);
299 int hfs_brec_remove(struct hfs_find_data *);
300 struct hfs_bnode *hfs_bnode_split(struct hfs_find_data *);
301 int hfs_brec_update_parent(struct hfs_find_data *);
302 int hfs_btree_inc_height(struct hfs_btree *);
303
304 /* bfind.c */
305 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
306 void hfs_find_exit(struct hfs_find_data *);
307 int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *);
308 int hfs_brec_find(struct hfs_find_data *);
309 int hfs_brec_read(struct hfs_find_data *, void *, int);
310 int hfs_brec_goto(struct hfs_find_data *, int);
311
312 /* catalog.c */
313 int hfsplus_cat_cmp_key(hfsplus_btree_key *, hfsplus_btree_key *);
314 void hfsplus_cat_build_key(hfsplus_btree_key *, u32, struct qstr *);
315 int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *);
316 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
317 int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
318 int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
319 struct inode *, struct qstr *);
320
321 /* extents.c */
322 int hfsplus_ext_cmp_key(hfsplus_btree_key *, hfsplus_btree_key *);
323 void hfsplus_ext_build_key(hfsplus_btree_key *, u32, u32, u8);
324 void hfsplus_ext_write_extent(struct inode *);
325 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
326 int hfsplus_free_fork(struct super_block *, u32, struct hfsplus_fork_raw *, int);
327 int hfsplus_file_extend(struct inode *);
328 void hfsplus_file_truncate(struct inode *);
329
330 /* inode.c */
331 extern struct address_space_operations hfsplus_aops;
332 extern struct address_space_operations hfsplus_btree_aops;
333
334 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
335 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
336 int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
337 int hfsplus_cat_write_inode(struct inode *);
338 struct inode *hfsplus_new_inode(struct super_block *, int);
339 void hfsplus_delete_inode(struct inode *);
340
341 /* ioctl.c */
342 int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
343 unsigned long arg);
344 int hfsplus_setxattr(struct dentry *dentry, const char *name,
345 const void *value, size_t size, int flags);
346 ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
347 void *value, size_t size);
348 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
349
350 /* options.c */
351 int parse_options(char *, struct hfsplus_sb_info *);
352 void fill_defaults(struct hfsplus_sb_info *);
353
354 /* tables.c */
355 extern u16 case_fold_table[];
356
357 /* unicode.c */
358 int hfsplus_unistrcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
359 int hfsplus_uni2asc(const struct hfsplus_unistr *, char *, int *);
360 int hfsplus_asc2uni(struct hfsplus_unistr *, const char *, int);
361
362 /* wrapper.c */
363 int hfsplus_read_wrapper(struct super_block *);
364
365 int hfs_part_find(struct super_block *, sector_t *, sector_t *);
366
367 /* access macros */
368 /*
369 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
370 {
371 return sb->s_fs_info;
372 }
373 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
374 {
375 return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
376 }
377 */
378 #define HFSPLUS_SB(super) (*(struct hfsplus_sb_info *)(super)->s_fs_info)
379 #define HFSPLUS_I(inode) (*list_entry(inode, struct hfsplus_inode_info, vfs_inode))
380
381 #if 1
382 #define hfsplus_kmap(p) ({ struct page *__p = (p); kmap(__p); })
383 #define hfsplus_kunmap(p) ({ struct page *__p = (p); kunmap(__p); __p; })
384 #else
385 #define hfsplus_kmap(p) kmap(p)
386 #define hfsplus_kunmap(p) kunmap(p)
387 #endif
388
389 #define sb_bread512(sb, sec, data) ({ \
390 struct buffer_head *__bh; \
391 sector_t __block; \
392 loff_t __start; \
393 int __offset; \
394 \
395 __start = (loff_t)(sec) << HFSPLUS_SECTOR_SHIFT;\
396 __block = __start >> (sb)->s_blocksize_bits; \
397 __offset = __start & ((sb)->s_blocksize - 1); \
398 __bh = sb_bread((sb), __block); \
399 if (likely(__bh != NULL)) \
400 data = (void *)(__bh->b_data + __offset);\
401 else \
402 data = NULL; \
403 __bh; \
404 })
405
406 /* time macros */
407 #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U)
408 #define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U))
409
410 /* compatibility */
411 #define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
412 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
413 #define hfsp_now2mt() __hfsp_ut2mt(get_seconds())
414
415 #define kdev_t_to_nr(x) (x)
416
417 #endif
418
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