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