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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 | ||
d6142673 JP |
12 | #ifdef pr_fmt |
13 | #undef pr_fmt | |
14 | #endif | |
15 | ||
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
17 | ||
1da177e4 LT |
18 | #include <linux/slab.h> |
19 | #include <linux/types.h> | |
3084b72d | 20 | #include <linux/mutex.h> |
1da177e4 LT |
21 | #include <linux/buffer_head.h> |
22 | #include <linux/fs.h> | |
5687b578 | 23 | #include <linux/workqueue.h> |
1da177e4 LT |
24 | |
25 | #include <asm/byteorder.h> | |
26 | #include <asm/uaccess.h> | |
27 | ||
28 | #include "hfs.h" | |
29 | ||
30 | #define DBG_BNODE_REFS 0x00000001 | |
31 | #define DBG_BNODE_MOD 0x00000002 | |
32 | #define DBG_CAT_MOD 0x00000004 | |
33 | #define DBG_INODE 0x00000008 | |
34 | #define DBG_SUPER 0x00000010 | |
35 | #define DBG_EXTENT 0x00000020 | |
36 | #define DBG_BITMAP 0x00000040 | |
37 | ||
38 | //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP) | |
39 | //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) | |
40 | //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) | |
41 | #define DBG_MASK (0) | |
42 | ||
d6142673 JP |
43 | #define hfs_dbg(flg, fmt, ...) \ |
44 | do { \ | |
45 | if (DBG_##flg & DBG_MASK) \ | |
46 | printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \ | |
c2b3e1f7 JP |
47 | } while (0) |
48 | ||
d6142673 JP |
49 | #define hfs_dbg_cont(flg, fmt, ...) \ |
50 | do { \ | |
51 | if (DBG_##flg & DBG_MASK) \ | |
52 | pr_cont(fmt, ##__VA_ARGS__); \ | |
c2b3e1f7 JP |
53 | } while (0) |
54 | ||
1da177e4 | 55 | |
1da177e4 LT |
56 | /* |
57 | * struct hfs_inode_info | |
58 | * | |
59 | * The HFS-specific part of a Linux (struct inode) | |
60 | */ | |
61 | struct hfs_inode_info { | |
62 | atomic_t opencnt; | |
63 | ||
64 | unsigned int flags; | |
65 | ||
66 | /* to deal with localtime ugliness */ | |
67 | int tz_secondswest; | |
68 | ||
69 | struct hfs_cat_key cat_key; | |
70 | ||
71 | struct list_head open_dir_list; | |
72 | struct inode *rsrc_inode; | |
73 | ||
39f8d472 | 74 | struct mutex extents_lock; |
1da177e4 LT |
75 | |
76 | u16 alloc_blocks, clump_blocks; | |
77 | sector_t fs_blocks; | |
78 | /* Allocation extents from catlog record or volume header */ | |
79 | hfs_extent_rec first_extents; | |
80 | u16 first_blocks; | |
81 | hfs_extent_rec cached_extents; | |
82 | u16 cached_start, cached_blocks; | |
83 | ||
84 | loff_t phys_size; | |
85 | struct inode vfs_inode; | |
86 | }; | |
87 | ||
88 | #define HFS_FLG_RSRC 0x0001 | |
89 | #define HFS_FLG_EXT_DIRTY 0x0002 | |
90 | #define HFS_FLG_EXT_NEW 0x0004 | |
91 | ||
92 | #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC) | |
93 | ||
94 | /* | |
95 | * struct hfs_sb_info | |
96 | * | |
97 | * The HFS-specific part of a Linux (struct super_block) | |
98 | */ | |
99 | struct hfs_sb_info { | |
100 | struct buffer_head *mdb_bh; /* The hfs_buffer | |
101 | holding the real | |
102 | superblock (aka VIB | |
103 | or MDB) */ | |
104 | struct hfs_mdb *mdb; | |
105 | struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding | |
106 | the alternate superblock */ | |
107 | struct hfs_mdb *alt_mdb; | |
108 | __be32 *bitmap; /* The page holding the | |
109 | allocation bitmap */ | |
110 | struct hfs_btree *ext_tree; /* Information about | |
111 | the extents b-tree */ | |
112 | struct hfs_btree *cat_tree; /* Information about | |
113 | the catalog b-tree */ | |
114 | u32 file_count; /* The number of | |
115 | regular files in | |
116 | the filesystem */ | |
117 | u32 folder_count; /* The number of | |
118 | directories in the | |
119 | filesystem */ | |
120 | u32 next_id; /* The next available | |
121 | file id number */ | |
122 | u32 clumpablks; /* The number of allocation | |
123 | blocks to try to add when | |
124 | extending a file */ | |
125 | u32 fs_start; /* The first 512-byte | |
126 | block represented | |
127 | in the bitmap */ | |
128 | u32 part_start; | |
129 | u16 root_files; /* The number of | |
130 | regular | |
131 | (non-directory) | |
132 | files in the root | |
133 | directory */ | |
134 | u16 root_dirs; /* The number of | |
135 | directories in the | |
136 | root directory */ | |
137 | u16 fs_ablocks; /* The number of | |
138 | allocation blocks | |
139 | in the filesystem */ | |
140 | u16 free_ablocks; /* the number of unused | |
141 | allocation blocks | |
142 | in the filesystem */ | |
143 | u32 alloc_blksz; /* The size of an | |
144 | "allocation block" */ | |
145 | int s_quiet; /* Silent failure when | |
146 | changing owner or mode? */ | |
147 | __be32 s_type; /* Type for new files */ | |
148 | __be32 s_creator; /* Creator for new files */ | |
149 | umode_t s_file_umask; /* The umask applied to the | |
150 | permissions on all files */ | |
151 | umode_t s_dir_umask; /* The umask applied to the | |
152 | permissions on all dirs */ | |
43b5e4cc EB |
153 | kuid_t s_uid; /* The uid of all files */ |
154 | kgid_t s_gid; /* The gid of all files */ | |
1da177e4 LT |
155 | |
156 | int session, part; | |
328b9227 | 157 | struct nls_table *nls_io, *nls_disk; |
3084b72d | 158 | struct mutex bitmap_lock; |
1da177e4 | 159 | unsigned long flags; |
1da177e4 | 160 | u16 blockoffset; |
1da177e4 | 161 | int fs_div; |
b16ca626 | 162 | struct super_block *sb; |
5687b578 AB |
163 | int work_queued; /* non-zero delayed work is queued */ |
164 | struct delayed_work mdb_work; /* MDB flush delayed work */ | |
165 | spinlock_t work_lock; /* protects mdb_work and work_queued */ | |
1da177e4 LT |
166 | }; |
167 | ||
168 | #define HFS_FLG_BITMAP_DIRTY 0 | |
169 | #define HFS_FLG_MDB_DIRTY 1 | |
170 | #define HFS_FLG_ALT_MDB_DIRTY 2 | |
171 | ||
172 | /* bitmap.c */ | |
173 | extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *); | |
174 | extern int hfs_clear_vbm_bits(struct super_block *, u16, u16); | |
175 | ||
176 | /* catalog.c */ | |
177 | extern int hfs_cat_keycmp(const btree_key *, const btree_key *); | |
178 | struct hfs_find_data; | |
179 | extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *); | |
180 | extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *); | |
181 | extern int hfs_cat_delete(u32, struct inode *, struct qstr *); | |
182 | extern int hfs_cat_move(u32, struct inode *, struct qstr *, | |
183 | struct inode *, struct qstr *); | |
328b9227 | 184 | extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *); |
1da177e4 LT |
185 | |
186 | /* dir.c */ | |
4b6f5d20 | 187 | extern const struct file_operations hfs_dir_operations; |
92e1d5be | 188 | extern const struct inode_operations hfs_dir_inode_operations; |
1da177e4 LT |
189 | |
190 | /* extent.c */ | |
191 | extern int hfs_ext_keycmp(const btree_key *, const btree_key *); | |
192 | extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int); | |
9509f178 | 193 | extern int hfs_ext_write_extent(struct inode *); |
1da177e4 LT |
194 | extern int hfs_extend_file(struct inode *); |
195 | extern void hfs_file_truncate(struct inode *); | |
196 | ||
197 | extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int); | |
198 | ||
199 | /* inode.c */ | |
f5e54d6e CH |
200 | extern const struct address_space_operations hfs_aops; |
201 | extern const struct address_space_operations hfs_btree_aops; | |
1da177e4 | 202 | |
e021d7b7 | 203 | extern struct inode *hfs_new_inode(struct inode *, struct qstr *, umode_t); |
1da177e4 | 204 | extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *); |
a9185b41 | 205 | extern int hfs_write_inode(struct inode *, struct writeback_control *); |
1da177e4 LT |
206 | extern int hfs_inode_setattr(struct dentry *, struct iattr *); |
207 | extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, | |
208 | __be32 log_size, __be32 phys_size, u32 clump_size); | |
209 | extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *); | |
b57922d9 | 210 | extern void hfs_evict_inode(struct inode *); |
1da177e4 LT |
211 | extern void hfs_delete_inode(struct inode *); |
212 | ||
213 | /* attr.c */ | |
214 | extern int hfs_setxattr(struct dentry *dentry, const char *name, | |
215 | const void *value, size_t size, int flags); | |
216 | extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name, | |
217 | void *value, size_t size); | |
218 | extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size); | |
219 | ||
220 | /* mdb.c */ | |
221 | extern int hfs_mdb_get(struct super_block *); | |
222 | extern void hfs_mdb_commit(struct super_block *); | |
223 | extern void hfs_mdb_close(struct super_block *); | |
224 | extern void hfs_mdb_put(struct super_block *); | |
225 | ||
226 | /* part_tbl.c */ | |
227 | extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); | |
228 | ||
229 | /* string.c */ | |
e16404ed | 230 | extern const struct dentry_operations hfs_dentry_operations; |
1da177e4 | 231 | |
da53be12 | 232 | extern int hfs_hash_dentry(const struct dentry *, struct qstr *); |
1da177e4 LT |
233 | extern int hfs_strcmp(const unsigned char *, unsigned int, |
234 | const unsigned char *, unsigned int); | |
da53be12 | 235 | extern int hfs_compare_dentry(const struct dentry *parent, const struct dentry *dentry, |
621e155a | 236 | unsigned int len, const char *str, const struct qstr *name); |
1da177e4 LT |
237 | |
238 | /* trans.c */ | |
328b9227 RZ |
239 | extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *); |
240 | extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *); | |
1da177e4 | 241 | |
5687b578 AB |
242 | /* super.c */ |
243 | extern void hfs_mark_mdb_dirty(struct super_block *sb); | |
244 | ||
1da177e4 LT |
245 | /* |
246 | * There are two time systems. Both are based on seconds since | |
247 | * a particular time/date. | |
248 | * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970 | |
249 | * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904 | |
250 | * | |
251 | */ | |
252 | #define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60) | |
253 | #define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60) | |
254 | ||
db6172c4 | 255 | #define HFS_I(inode) (container_of(inode, struct hfs_inode_info, vfs_inode)) |
1da177e4 LT |
256 | #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info) |
257 | ||
258 | #define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) } | |
259 | #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec) | |
260 | #define hfs_mtime() __hfs_u_to_mtime(get_seconds()) | |
261 | ||
262 | static inline const char *hfs_mdb_name(struct super_block *sb) | |
263 | { | |
264 | return sb->s_id; | |
265 | } | |
266 | ||
267 | static inline void hfs_bitmap_dirty(struct super_block *sb) | |
268 | { | |
269 | set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags); | |
5687b578 | 270 | hfs_mark_mdb_dirty(sb); |
1da177e4 LT |
271 | } |
272 | ||
1da177e4 LT |
273 | #define sb_bread512(sb, sec, data) ({ \ |
274 | struct buffer_head *__bh; \ | |
275 | sector_t __block; \ | |
276 | loff_t __start; \ | |
277 | int __offset; \ | |
278 | \ | |
279 | __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\ | |
280 | __block = __start >> (sb)->s_blocksize_bits; \ | |
281 | __offset = __start & ((sb)->s_blocksize - 1); \ | |
282 | __bh = sb_bread((sb), __block); \ | |
283 | if (likely(__bh != NULL)) \ | |
284 | data = (void *)(__bh->b_data + __offset);\ | |
285 | else \ | |
286 | data = NULL; \ | |
287 | __bh; \ | |
288 | }) | |
289 | ||
290 | #endif |