tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
39typedef 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 */
44struct 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
72struct page;
73
74/* An HFS+ BTree node in memory */
75struct 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
105struct hfsplus_vh;
106struct hfs_btree;
107
108struct 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
156struct 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
189struct 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
202struct 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 */
259int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
260int hfsplus_block_free(struct super_block *, u32, u32);
261
262/* btree.c */
263struct hfs_btree *hfs_btree_open(struct super_block *, u32);
264void hfs_btree_close(struct hfs_btree *);
265void hfs_btree_write(struct hfs_btree *);
266struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
267void hfs_bmap_free(struct hfs_bnode *);
268
269/* bnode.c */
270void hfs_bnode_read(struct hfs_bnode *, void *, int, int);
271u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
272u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
273void hfs_bnode_read_key(struct hfs_bnode *, void *, int);
274void hfs_bnode_write(struct hfs_bnode *, void *, int, int);
275void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
276void hfs_bnode_clear(struct hfs_bnode *, int, int);
277void hfs_bnode_copy(struct hfs_bnode *, int,
278 struct hfs_bnode *, int, int);
279void hfs_bnode_move(struct hfs_bnode *, int, int, int);
280void hfs_bnode_dump(struct hfs_bnode *);
281void hfs_bnode_unlink(struct hfs_bnode *);
282struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32);
283struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32);
284void hfs_bnode_unhash(struct hfs_bnode *);
285void hfs_bnode_free(struct hfs_bnode *);
286struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32);
287void hfs_bnode_get(struct hfs_bnode *);
288void hfs_bnode_put(struct hfs_bnode *);
289
290/* brec.c */
291u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *);
292u16 hfs_brec_keylen(struct hfs_bnode *, u16);
293int hfs_brec_insert(struct hfs_find_data *, void *, int);
294int hfs_brec_remove(struct hfs_find_data *);
295
296/* bfind.c */
297int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
298void hfs_find_exit(struct hfs_find_data *);
299int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *);
300int hfs_brec_find(struct hfs_find_data *);
301int hfs_brec_read(struct hfs_find_data *, void *, int);
302int hfs_brec_goto(struct hfs_find_data *, int);
303
304/* catalog.c */
305int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
306int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
307void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *, u32, struct qstr *);
308int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *);
309int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
310int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
311int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
312 struct inode *, struct qstr *);
313
314/* dir.c */
315extern const struct inode_operations hfsplus_dir_inode_operations;
316extern const struct file_operations hfsplus_dir_operations;
317
318/* extents.c */
319int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
320void hfsplus_ext_write_extent(struct inode *);
321int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
322int hfsplus_free_fork(struct super_block *, u32, struct hfsplus_fork_raw *, int);
323int hfsplus_file_extend(struct inode *);
324void hfsplus_file_truncate(struct inode *);
325
326/* inode.c */
327extern const struct address_space_operations hfsplus_aops;
328extern const struct address_space_operations hfsplus_btree_aops;
329extern struct dentry_operations hfsplus_dentry_operations;
330
331void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
332void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
333int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
334int hfsplus_cat_write_inode(struct inode *);
335struct inode *hfsplus_new_inode(struct super_block *, int);
336void hfsplus_delete_inode(struct inode *);
337
338/* ioctl.c */
339int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
340 unsigned long arg);
341int hfsplus_setxattr(struct dentry *dentry, const char *name,
342 const void *value, size_t size, int flags);
343ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
344 void *value, size_t size);
345ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
346
347/* options.c */
348int hfsplus_parse_options(char *, struct hfsplus_sb_info *);
349void hfsplus_fill_defaults(struct hfsplus_sb_info *);
350int hfsplus_show_options(struct seq_file *, struct vfsmount *);
351
352/* super.c */
353struct inode *hfsplus_iget(struct super_block *, unsigned long);
354
355/* tables.c */
356extern u16 hfsplus_case_fold_table[];
357extern u16 hfsplus_decompose_table[];
358extern u16 hfsplus_compose_table[];
359
360/* unicode.c */
361int hfsplus_strcasecmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
362int hfsplus_strcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
363int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *);
364int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int);
365int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str);
366int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2);
367
368/* wrapper.c */
369int hfsplus_read_wrapper(struct super_block *);
370
371int hfs_part_find(struct super_block *, sector_t *, sector_t *);
372
373/* access macros */
374/*
375static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
376{
377 return sb->s_fs_info;
378}
379static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
380{
381 return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
382}
383*/
384#define HFSPLUS_SB(super) (*(struct hfsplus_sb_info *)(super)->s_fs_info)
385#define HFSPLUS_I(inode) (*list_entry(inode, struct hfsplus_inode_info, vfs_inode))
386
387#if 1
388#define hfsplus_kmap(p) ({ struct page *__p = (p); kmap(__p); })
389#define hfsplus_kunmap(p) ({ struct page *__p = (p); kunmap(__p); __p; })
390#else
391#define hfsplus_kmap(p) kmap(p)
392#define hfsplus_kunmap(p) kunmap(p)
393#endif
394
395#define sb_bread512(sb, sec, data) ({ \
396 struct buffer_head *__bh; \
397 sector_t __block; \
398 loff_t __start; \
399 int __offset; \
400 \
401 __start = (loff_t)(sec) << HFSPLUS_SECTOR_SHIFT;\
402 __block = __start >> (sb)->s_blocksize_bits; \
403 __offset = __start & ((sb)->s_blocksize - 1); \
404 __bh = sb_bread((sb), __block); \
405 if (likely(__bh != NULL)) \
406 data = (void *)(__bh->b_data + __offset);\
407 else \
408 data = NULL; \
409 __bh; \
410})
411
412/* time macros */
413#define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U)
414#define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U))
415
416/* compatibility */
417#define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
418#define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
419#define hfsp_now2mt() __hfsp_ut2mt(get_seconds())
420
421#define kdev_t_to_nr(x) (x)
422
423#endif