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1da177e4 LT |
1 | /* |
2 | * linux/fs/hfs/hfs_fs.h | |
3 | * | |
4 | * Copyright (C) 1995-1997 Paul H. Hargrove | |
5 | * (C) 2003 Ardis Technologies <roman@ardistech.com> | |
6 | * This file may be distributed under the terms of the GNU General Public License. | |
7 | */ | |
8 | ||
9 | #ifndef _LINUX_HFS_FS_H | |
10 | #define _LINUX_HFS_FS_H | |
11 | ||
12 | #include <linux/version.h> | |
13 | #include <linux/slab.h> | |
14 | #include <linux/types.h> | |
15 | #include <linux/buffer_head.h> | |
16 | #include <linux/fs.h> | |
17 | ||
18 | #include <asm/byteorder.h> | |
19 | #include <asm/uaccess.h> | |
20 | ||
21 | #include "hfs.h" | |
22 | ||
23 | #define DBG_BNODE_REFS 0x00000001 | |
24 | #define DBG_BNODE_MOD 0x00000002 | |
25 | #define DBG_CAT_MOD 0x00000004 | |
26 | #define DBG_INODE 0x00000008 | |
27 | #define DBG_SUPER 0x00000010 | |
28 | #define DBG_EXTENT 0x00000020 | |
29 | #define DBG_BITMAP 0x00000040 | |
30 | ||
31 | //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP) | |
32 | //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) | |
33 | //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) | |
34 | #define DBG_MASK (0) | |
35 | ||
36 | #define dprint(flg, fmt, args...) \ | |
37 | if (flg & DBG_MASK) printk(fmt , ## args) | |
38 | ||
39 | #define hfs_warn(format, args...) printk(KERN_WARNING format , ## args) | |
40 | #define hfs_error(format, args...) printk(KERN_ERR format , ## args) | |
41 | ||
42 | /* | |
43 | * struct hfs_inode_info | |
44 | * | |
45 | * The HFS-specific part of a Linux (struct inode) | |
46 | */ | |
47 | struct hfs_inode_info { | |
48 | atomic_t opencnt; | |
49 | ||
50 | unsigned int flags; | |
51 | ||
52 | /* to deal with localtime ugliness */ | |
53 | int tz_secondswest; | |
54 | ||
55 | struct hfs_cat_key cat_key; | |
56 | ||
57 | struct list_head open_dir_list; | |
58 | struct inode *rsrc_inode; | |
59 | ||
60 | struct semaphore extents_lock; | |
61 | ||
62 | u16 alloc_blocks, clump_blocks; | |
63 | sector_t fs_blocks; | |
64 | /* Allocation extents from catlog record or volume header */ | |
65 | hfs_extent_rec first_extents; | |
66 | u16 first_blocks; | |
67 | hfs_extent_rec cached_extents; | |
68 | u16 cached_start, cached_blocks; | |
69 | ||
70 | loff_t phys_size; | |
71 | struct inode vfs_inode; | |
72 | }; | |
73 | ||
74 | #define HFS_FLG_RSRC 0x0001 | |
75 | #define HFS_FLG_EXT_DIRTY 0x0002 | |
76 | #define HFS_FLG_EXT_NEW 0x0004 | |
77 | ||
78 | #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC) | |
79 | ||
80 | /* | |
81 | * struct hfs_sb_info | |
82 | * | |
83 | * The HFS-specific part of a Linux (struct super_block) | |
84 | */ | |
85 | struct hfs_sb_info { | |
86 | struct buffer_head *mdb_bh; /* The hfs_buffer | |
87 | holding the real | |
88 | superblock (aka VIB | |
89 | or MDB) */ | |
90 | struct hfs_mdb *mdb; | |
91 | struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding | |
92 | the alternate superblock */ | |
93 | struct hfs_mdb *alt_mdb; | |
94 | __be32 *bitmap; /* The page holding the | |
95 | allocation bitmap */ | |
96 | struct hfs_btree *ext_tree; /* Information about | |
97 | the extents b-tree */ | |
98 | struct hfs_btree *cat_tree; /* Information about | |
99 | the catalog b-tree */ | |
100 | u32 file_count; /* The number of | |
101 | regular files in | |
102 | the filesystem */ | |
103 | u32 folder_count; /* The number of | |
104 | directories in the | |
105 | filesystem */ | |
106 | u32 next_id; /* The next available | |
107 | file id number */ | |
108 | u32 clumpablks; /* The number of allocation | |
109 | blocks to try to add when | |
110 | extending a file */ | |
111 | u32 fs_start; /* The first 512-byte | |
112 | block represented | |
113 | in the bitmap */ | |
114 | u32 part_start; | |
115 | u16 root_files; /* The number of | |
116 | regular | |
117 | (non-directory) | |
118 | files in the root | |
119 | directory */ | |
120 | u16 root_dirs; /* The number of | |
121 | directories in the | |
122 | root directory */ | |
123 | u16 fs_ablocks; /* The number of | |
124 | allocation blocks | |
125 | in the filesystem */ | |
126 | u16 free_ablocks; /* the number of unused | |
127 | allocation blocks | |
128 | in the filesystem */ | |
129 | u32 alloc_blksz; /* The size of an | |
130 | "allocation block" */ | |
131 | int s_quiet; /* Silent failure when | |
132 | changing owner or mode? */ | |
133 | __be32 s_type; /* Type for new files */ | |
134 | __be32 s_creator; /* Creator for new files */ | |
135 | umode_t s_file_umask; /* The umask applied to the | |
136 | permissions on all files */ | |
137 | umode_t s_dir_umask; /* The umask applied to the | |
138 | permissions on all dirs */ | |
139 | uid_t s_uid; /* The uid of all files */ | |
140 | gid_t s_gid; /* The gid of all files */ | |
141 | ||
142 | int session, part; | |
143 | ||
328b9227 RZ |
144 | struct nls_table *nls_io, *nls_disk; |
145 | ||
1da177e4 LT |
146 | struct semaphore bitmap_lock; |
147 | ||
148 | unsigned long flags; | |
149 | ||
150 | u16 blockoffset; | |
151 | ||
152 | int fs_div; | |
153 | ||
154 | struct hlist_head rsrc_inodes; | |
155 | }; | |
156 | ||
157 | #define HFS_FLG_BITMAP_DIRTY 0 | |
158 | #define HFS_FLG_MDB_DIRTY 1 | |
159 | #define HFS_FLG_ALT_MDB_DIRTY 2 | |
160 | ||
161 | /* bitmap.c */ | |
162 | extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *); | |
163 | extern int hfs_clear_vbm_bits(struct super_block *, u16, u16); | |
164 | ||
165 | /* catalog.c */ | |
166 | extern int hfs_cat_keycmp(const btree_key *, const btree_key *); | |
167 | struct hfs_find_data; | |
168 | extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *); | |
169 | extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *); | |
170 | extern int hfs_cat_delete(u32, struct inode *, struct qstr *); | |
171 | extern int hfs_cat_move(u32, struct inode *, struct qstr *, | |
172 | struct inode *, struct qstr *); | |
328b9227 | 173 | extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *); |
1da177e4 LT |
174 | |
175 | /* dir.c */ | |
176 | extern struct file_operations hfs_dir_operations; | |
177 | extern struct inode_operations hfs_dir_inode_operations; | |
178 | ||
179 | /* extent.c */ | |
180 | extern int hfs_ext_keycmp(const btree_key *, const btree_key *); | |
181 | extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int); | |
182 | extern void hfs_ext_write_extent(struct inode *); | |
183 | extern int hfs_extend_file(struct inode *); | |
184 | extern void hfs_file_truncate(struct inode *); | |
185 | ||
186 | extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int); | |
187 | ||
188 | /* inode.c */ | |
189 | extern struct address_space_operations hfs_aops; | |
190 | extern struct address_space_operations hfs_btree_aops; | |
191 | ||
192 | extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int); | |
193 | extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *); | |
194 | extern int hfs_write_inode(struct inode *, int); | |
195 | extern int hfs_inode_setattr(struct dentry *, struct iattr *); | |
196 | extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, | |
197 | __be32 log_size, __be32 phys_size, u32 clump_size); | |
198 | extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *); | |
199 | extern void hfs_clear_inode(struct inode *); | |
200 | extern void hfs_delete_inode(struct inode *); | |
201 | ||
202 | /* attr.c */ | |
203 | extern int hfs_setxattr(struct dentry *dentry, const char *name, | |
204 | const void *value, size_t size, int flags); | |
205 | extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name, | |
206 | void *value, size_t size); | |
207 | extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
208 | ||
209 | /* mdb.c */ | |
210 | extern int hfs_mdb_get(struct super_block *); | |
211 | extern void hfs_mdb_commit(struct super_block *); | |
212 | extern void hfs_mdb_close(struct super_block *); | |
213 | extern void hfs_mdb_put(struct super_block *); | |
214 | ||
215 | /* part_tbl.c */ | |
216 | extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); | |
217 | ||
218 | /* string.c */ | |
219 | extern struct dentry_operations hfs_dentry_operations; | |
220 | ||
221 | extern int hfs_hash_dentry(struct dentry *, struct qstr *); | |
222 | extern int hfs_strcmp(const unsigned char *, unsigned int, | |
223 | const unsigned char *, unsigned int); | |
224 | extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *); | |
225 | ||
226 | /* trans.c */ | |
328b9227 RZ |
227 | extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *); |
228 | extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *); | |
1da177e4 LT |
229 | |
230 | extern struct timezone sys_tz; | |
231 | ||
232 | /* | |
233 | * There are two time systems. Both are based on seconds since | |
234 | * a particular time/date. | |
235 | * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970 | |
236 | * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904 | |
237 | * | |
238 | */ | |
239 | #define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60) | |
240 | #define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60) | |
241 | ||
242 | #define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode)) | |
243 | #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info) | |
244 | ||
245 | #define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) } | |
246 | #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec) | |
247 | #define hfs_mtime() __hfs_u_to_mtime(get_seconds()) | |
248 | ||
249 | static inline const char *hfs_mdb_name(struct super_block *sb) | |
250 | { | |
251 | return sb->s_id; | |
252 | } | |
253 | ||
254 | static inline void hfs_bitmap_dirty(struct super_block *sb) | |
255 | { | |
256 | set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags); | |
257 | sb->s_dirt = 1; | |
258 | } | |
259 | ||
260 | static inline void hfs_buffer_sync(struct buffer_head *bh) | |
261 | { | |
262 | while (buffer_locked(bh)) { | |
263 | wait_on_buffer(bh); | |
264 | } | |
265 | if (buffer_dirty(bh)) { | |
266 | ll_rw_block(WRITE, 1, &bh); | |
267 | wait_on_buffer(bh); | |
268 | } | |
269 | } | |
270 | ||
271 | #define sb_bread512(sb, sec, data) ({ \ | |
272 | struct buffer_head *__bh; \ | |
273 | sector_t __block; \ | |
274 | loff_t __start; \ | |
275 | int __offset; \ | |
276 | \ | |
277 | __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\ | |
278 | __block = __start >> (sb)->s_blocksize_bits; \ | |
279 | __offset = __start & ((sb)->s_blocksize - 1); \ | |
280 | __bh = sb_bread((sb), __block); \ | |
281 | if (likely(__bh != NULL)) \ | |
282 | data = (void *)(__bh->b_data + __offset);\ | |
283 | else \ | |
284 | data = NULL; \ | |
285 | __bh; \ | |
286 | }) | |
287 | ||
288 | #endif |