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 "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
24 //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
25 //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD)
26 //#define DBG_MASK (DBG_BNODE_REFS|DBG_INODE|DBG_BNODE_MOD)
27 #define DBG_MASK (0)
28
29 #define dprint(flg, fmt, args...) \
30 if (flg & DBG_MASK) printk(fmt , ## args)
31
32 /* Runtime config options */
33 #define HFSPLUS_CASE_ASIS 0
34 #define HFSPLUS_CASE_LOWER 1
35
36 #define HFSPLUS_FORK_RAW 0
37 #define HFSPLUS_FORK_CAP 1
38 #define HFSPLUS_FORK_DOUBLE 2
39 #define HFSPLUS_FORK_NETATALK 3
40
41 #define HFSPLUS_NAMES_TRIVIAL 0
42 #define HFSPLUS_NAMES_CAP 1
43 #define HFSPLUS_NAMES_NETATALK 2
44 #define HFSPLUS_NAMES_7BIT 3
45
46 #define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */
47
48 #define HFSPLUS_TYPE_DATA 0x00
49 #define HFSPLUS_TYPE_RSRC 0xFF
50
51 typedef int (*btree_keycmp)(hfsplus_btree_key *, hfsplus_btree_key *);
52
53 #define NODE_HASH_SIZE 256
54
55 /* An HFS+ BTree held in memory */
56 typedef struct hfsplus_btree {
57 struct super_block *sb;
58 struct inode *inode;
59 btree_keycmp keycmp;
60
61 u32 cnid;
62 u32 root;
63 u32 leaf_count;
64 u32 leaf_head;
65 u32 leaf_tail;
66 u32 node_count;
67 u32 free_nodes;
68 u32 attributes;
69
70 unsigned int node_size;
71 unsigned int node_size_shift;
72 unsigned int max_key_len;
73 unsigned int depth;
74
75 //unsigned int map1_size, map_size;
76 struct semaphore tree_lock;
77
78 unsigned int pages_per_bnode;
79 spinlock_t hash_lock;
80 struct hfsplus_bnode *node_hash[NODE_HASH_SIZE];
81 int node_hash_cnt;
82 } hfsplus_btree;
83
84 struct page;
85
86 /* An HFS+ BTree node in memory */
87 typedef struct hfsplus_bnode {
88 struct hfsplus_btree *tree;
89
90 u32 prev;
91 u32 this;
92 u32 next;
93 u32 parent;
94
95 u16 num_recs;
96 u8 kind;
97 u8 height;
98
99 struct hfsplus_bnode *next_hash;
100 unsigned long flags;
101 wait_queue_head_t lock_wq;
102 atomic_t refcnt;
103 unsigned int page_offset;
104 struct page *page[0];
105 } hfsplus_bnode;
106
107 #define HFSPLUS_BNODE_LOCK 0
108 #define HFSPLUS_BNODE_ERROR 1
109 #define HFSPLUS_BNODE_NEW 2
110 #define HFSPLUS_BNODE_DIRTY 3
111 #define HFSPLUS_BNODE_DELETED 4
112
113 /*
114 * HFS+ superblock info (built from Volume Header on disk)
115 */
116
117 struct hfsplus_vh;
118 struct hfsplus_btree;
119
120 struct hfsplus_sb_info {
121 struct buffer_head *s_vhbh;
122 struct hfsplus_vh *s_vhdr;
123 struct hfsplus_btree *ext_tree;
124 struct hfsplus_btree *cat_tree;
125 struct hfsplus_btree *attr_tree;
126 struct inode *alloc_file;
127 struct inode *hidden_dir;
128
129 /* Runtime variables */
130 u32 blockoffset;
131 u32 sect_count;
132 //int a2b_shift;
133
134 /* Stuff in host order from Vol Header */
135 u32 total_blocks;
136 u32 free_blocks;
137 u32 next_alloc;
138 u32 next_cnid;
139 u32 file_count;
140 u32 folder_count;
141
142 /* Config options */
143 u32 creator;
144 u32 type;
145
146 int charcase;
147 int fork;
148 int namemap;
149
150 umode_t umask;
151 uid_t uid;
152 gid_t gid;
153
154 unsigned long flags;
155
156 atomic_t inode_cnt;
157 u32 last_inode_cnt;
158
159 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
160 struct list_head rsrc_inodes;
161 #else
162 struct hlist_head rsrc_inodes;
163 #endif
164 };
165
166 #define HFSPLUS_SB_WRITEBACKUP 0x0001
167
168
169 struct hfsplus_inode_info {
170 /* Device number in hfsplus_permissions in catalog */
171 u32 dev;
172 /* Allocation extents from catlog record or volume header */
173 hfsplus_extent_rec extents;
174 u32 total_blocks, extent_blocks, alloc_blocks;
175 atomic_t opencnt;
176
177 struct inode *rsrc_inode;
178 unsigned long flags;
179
180 struct list_head open_dir_list;
181 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
182 unsigned long mmu_private;
183 #else
184 loff_t mmu_private;
185 struct inode vfs_inode;
186 #endif
187 };
188
189 #define HFSPLUS_FLG_RSRC 0x0001
190 #define HFSPLUS_FLG_DIRTYMODE 0x0002
191
192 #define HFSPLUS_IS_DATA(inode) (!(HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC))
193 #define HFSPLUS_IS_RSRC(inode) (HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC)
194
195 struct hfsplus_find_data {
196 /* filled by caller */
197 hfsplus_btree_key *search_key;
198 hfsplus_btree_key *key;
199 /* filled by find */
200 hfsplus_btree *tree;
201 hfsplus_bnode *bnode;
202 /* filled by findrec */
203 int record, exact;
204 int keyoffset, keylength;
205 int entryoffset, entrylength;
206 };
207
208 struct hfsplus_readdir_data {
209 struct list_head list;
210 struct file *file;
211 hfsplus_cat_key key;
212 };
213
214 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
215 typedef long sector_t;
216 #endif
217
218 /*
219 * Functions in any *.c used in other files
220 */
221
222 /* bfind.c */
223 void hfsplus_find_rec(hfsplus_bnode *, struct hfsplus_find_data *);
224 int hfsplus_btree_find(struct hfsplus_find_data *);
225 int hfsplus_btree_find_entry(struct hfsplus_find_data *,
226 void *, int);
227 int hfsplus_btree_move(struct hfsplus_find_data *, int);
228 int hfsplus_find_init(hfsplus_btree *, struct hfsplus_find_data *);
229 void hfsplus_find_exit(struct hfsplus_find_data *);
230
231 /* bnode.c */
232 struct buffer_head *hfsplus_getblk(struct inode *, unsigned long);
233 hfsplus_bnode *__hfsplus_find_bnode(hfsplus_btree *, u32);
234 void __hfsplus_bnode_remove(hfsplus_bnode *);
235 hfsplus_bnode *hfsplus_create_bnode(hfsplus_btree *, u32);
236 hfsplus_bnode *hfsplus_find_bnode(hfsplus_btree *, u32);
237 void hfsplus_get_bnode(hfsplus_bnode *);
238 void hfsplus_put_bnode(hfsplus_bnode *);
239 void hfsplus_bnode_free(hfsplus_bnode *);
240 void hfsplus_bnode_readbytes(hfsplus_bnode *, void *, unsigned long, unsigned long);
241 u16 hfsplus_bnode_read_u16(hfsplus_bnode *, unsigned long);
242 void hfsplus_bnode_writebytes(hfsplus_bnode *, void *, unsigned long, unsigned long);
243 void hfsplus_bnode_write_u16(hfsplus_bnode *, unsigned long, u16);
244 void hfsplus_bnode_copybytes(hfsplus_bnode *, unsigned long,
245 hfsplus_bnode *, unsigned long, unsigned long);
246 void hfsplus_bnode_movebytes(hfsplus_bnode *, unsigned long, unsigned long, unsigned long);
247 int hfsplus_bnode_insert_rec(struct hfsplus_find_data *, void *, int);
248 int hfsplus_bnode_remove_rec(struct hfsplus_find_data *);
249
250 /* brec.c */
251 u16 hfsplus_brec_lenoff(hfsplus_bnode *, u16, u16 *);
252 u16 hfsplus_brec_keylen(hfsplus_bnode *, u16);
253
254 /* btree.c */
255 hfsplus_btree *hfsplus_open_btree(struct super_block *, u32);
256 void hfsplus_close_btree(struct hfsplus_btree *);
257 void hfsplus_write_btree(struct hfsplus_btree *);
258 hfsplus_bnode *hfsplus_btree_alloc_node(hfsplus_btree *);
259 void hfsplus_btree_remove_node(hfsplus_bnode *);
260 void hfsplus_btree_free_node(hfsplus_bnode *);
261
262 /* catalog.c */
263 int hfsplus_cmp_cat_key(hfsplus_btree_key *, hfsplus_btree_key *);
264 void hfsplus_fill_cat_key(hfsplus_btree_key *, u32, struct qstr *);
265 int hfsplus_find_cat(struct super_block *, unsigned long, struct hfsplus_find_data *);
266 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
267 int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
268 int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
269 struct inode *, struct qstr *);
270
271 /* extents.c */
272 int hfsplus_cmp_ext_key(hfsplus_btree_key *, hfsplus_btree_key *);
273 void hfsplus_fill_ext_key(hfsplus_btree_key *, u32, u32, u8);
274 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
275 int hfsplus_free_fork(struct super_block *, u32, hfsplus_fork_raw *, int);
276 int hfsplus_extend_file(struct inode *);
277 void hfsplus_truncate(struct inode *);
278
279 /* inode.c */
280 void hfsplus_inode_read_fork(struct inode *, hfsplus_fork_raw *);
281 void hfsplus_inode_write_fork(struct inode *, hfsplus_fork_raw *);
282 int hfsplus_cat_read_inode(struct inode *, struct hfsplus_find_data *);
283 void hfsplus_cat_write_inode(struct inode *);
284 struct inode *hfsplus_new_inode(struct super_block *, int);
285 void hfsplus_delete_inode(struct inode *);
286
287 extern struct address_space_operations hfsplus_btree_aops;
288
289 /* options.c */
290 int parse_options(char *, struct hfsplus_sb_info *);
291 void fill_defaults(struct hfsplus_sb_info *);
292 void fill_current(struct hfsplus_sb_info *, struct hfsplus_sb_info *);
293
294 /* tables.c */
295 extern u16 case_fold_table[];
296
297 /* unicode.c */
298 int hfsplus_unistrcmp(const hfsplus_unistr *, const hfsplus_unistr *);
299 int hfsplus_uni2asc(const hfsplus_unistr *, char *, int *);
300 int hfsplus_asc2uni(hfsplus_unistr *, const char *, int);
301
302 /* wrapper.c */
303 int hfsplus_read_wrapper(struct super_block *);
304
305 /* access macros */
306 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
307 #define HFSPLUS_SB(super) (*(struct hfsplus_sb_info *)&(super)->u)
308 #define HFSPLUS_I(inode) (*(struct hfsplus_inode_info *)&(inode)->u)
309 #else
310 /*
311 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
312 {
313 return sb->s_fs_info;
314 }
315 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
316 {
317 return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
318 }
319 */
320 #define HFSPLUS_SB(super) (*(struct hfsplus_sb_info *)(super)->s_fs_info)
321 #define HFSPLUS_I(inode) (*list_entry(inode, struct hfsplus_inode_info, vfs_inode))
322 #endif
323
324 #if 1
325 #define hfsplus_kmap(p) ({ struct page *__p = (p); kmap(__p); })
326 #define hfsplus_kunmap(p) ({ struct page *__p = (p); kunmap(__p); __p; })
327 #else
328 #define hfsplus_kmap(p) kmap(p)
329 #define hfsplus_kunmap(p) kunmap(p)
330 #endif
331
332 /* time macros */
333 #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U)
334 #define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U))
335
336 /* compatibility */
337 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)
338 #define PageUptodate(page) Page_Uptodate(page)
339 #define wait_on_page_locked(page) wait_on_page(page)
340 #define get_seconds() CURRENT_TIME
341 #define page_symlink(i,n,l) block_symlink(i,n,l)
342 #define map_bh(bh, sb, block) ({ \
343 bh->b_dev = kdev_t_to_nr(sb->s_dev); \
344 bh->b_blocknr = block; \
345 bh->b_state |= (1UL << BH_Mapped); \
346 })
347 #define set_buffer_new(bh) (bh->b_state |= (1UL << BH_New))
348 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,21)
349 #define new_inode(sb) ({ \
350 struct inode *inode = get_empty_inode(); \
351 if (inode) { \
352 inode->i_sb = sb; \
353 inode->i_dev = sb->s_dev; \
354 inode->i_blkbits = sb->s_blocksize_bits; \
355 } \
356 inode; \
357 })
358 #endif
359 #define hfsp_mt2ut(t) __hfsp_mt2ut(t)
360 #define hfsp_ut2mt(t) __hfsp_ut2mt(t)
361 #define hfsp_now2mt() __hfsp_ut2mt(CURRENT_TIME)
362 #else
363 #define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
364 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
365 #define hfsp_now2mt() __hfsp_ut2mt(get_seconds())
366 #endif
367
368 #endif
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