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