2 * linux/fs/hfs/hfs_fs.h
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.
9 #ifndef _LINUX_HFS_FS_H
10 #define _LINUX_HFS_FS_H
12 #include <linux/slab.h>
13 #include <linux/types.h>
14 #include <linux/buffer_head.h>
17 #include <asm/byteorder.h>
18 #include <asm/uaccess.h>
22 #define DBG_BNODE_REFS 0x00000001
23 #define DBG_BNODE_MOD 0x00000002
24 #define DBG_CAT_MOD 0x00000004
25 #define DBG_INODE 0x00000008
26 #define DBG_SUPER 0x00000010
27 #define DBG_EXTENT 0x00000020
28 #define DBG_BITMAP 0x00000040
30 //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
31 //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
32 //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
35 #define dprint(flg, fmt, args...) \
36 if (flg & DBG_MASK) printk(fmt , ## args)
38 #define hfs_warn(format, args...) printk(KERN_WARNING format , ## args)
39 #define hfs_error(format, args...) printk(KERN_ERR format , ## args)
42 * struct hfs_inode_info
44 * The HFS-specific part of a Linux (struct inode)
46 struct hfs_inode_info {
51 /* to deal with localtime ugliness */
54 struct hfs_cat_key cat_key;
56 struct list_head open_dir_list;
57 struct inode *rsrc_inode;
59 struct semaphore extents_lock;
61 u16 alloc_blocks, clump_blocks;
63 /* Allocation extents from catlog record or volume header */
64 hfs_extent_rec first_extents;
66 hfs_extent_rec cached_extents;
67 u16 cached_start, cached_blocks;
70 struct inode vfs_inode;
73 #define HFS_FLG_RSRC 0x0001
74 #define HFS_FLG_EXT_DIRTY 0x0002
75 #define HFS_FLG_EXT_NEW 0x0004
77 #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC)
82 * The HFS-specific part of a Linux (struct super_block)
85 struct buffer_head *mdb_bh; /* The hfs_buffer
90 struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding
91 the alternate superblock */
92 struct hfs_mdb *alt_mdb;
93 __be32 *bitmap; /* The page holding the
95 struct hfs_btree *ext_tree; /* Information about
97 struct hfs_btree *cat_tree; /* Information about
99 u32 file_count; /* The number of
102 u32 folder_count; /* The number of
105 u32 next_id; /* The next available
107 u32 clumpablks; /* The number of allocation
108 blocks to try to add when
110 u32 fs_start; /* The first 512-byte
114 u16 root_files; /* The number of
119 u16 root_dirs; /* The number of
122 u16 fs_ablocks; /* The number of
125 u16 free_ablocks; /* the number of unused
128 u32 alloc_blksz; /* The size of an
129 "allocation block" */
130 int s_quiet; /* Silent failure when
131 changing owner or mode? */
132 __be32 s_type; /* Type for new files */
133 __be32 s_creator; /* Creator for new files */
134 umode_t s_file_umask; /* The umask applied to the
135 permissions on all files */
136 umode_t s_dir_umask; /* The umask applied to the
137 permissions on all dirs */
138 uid_t s_uid; /* The uid of all files */
139 gid_t s_gid; /* The gid of all files */
143 struct nls_table *nls_io, *nls_disk;
145 struct semaphore bitmap_lock;
153 struct hlist_head rsrc_inodes;
156 #define HFS_FLG_BITMAP_DIRTY 0
157 #define HFS_FLG_MDB_DIRTY 1
158 #define HFS_FLG_ALT_MDB_DIRTY 2
161 extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
162 extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);
165 extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
166 struct hfs_find_data;
167 extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
168 extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *);
169 extern int hfs_cat_delete(u32, struct inode *, struct qstr *);
170 extern int hfs_cat_move(u32, struct inode *, struct qstr *,
171 struct inode *, struct qstr *);
172 extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *);
175 extern struct file_operations hfs_dir_operations;
176 extern struct inode_operations hfs_dir_inode_operations;
179 extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
180 extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
181 extern void hfs_ext_write_extent(struct inode *);
182 extern int hfs_extend_file(struct inode *);
183 extern void hfs_file_truncate(struct inode *);
185 extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
188 extern struct address_space_operations hfs_aops;
189 extern struct address_space_operations hfs_btree_aops;
191 extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int);
192 extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
193 extern int hfs_write_inode(struct inode *, int);
194 extern int hfs_inode_setattr(struct dentry *, struct iattr *);
195 extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
196 __be32 log_size, __be32 phys_size, u32 clump_size);
197 extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
198 extern void hfs_clear_inode(struct inode *);
199 extern void hfs_delete_inode(struct inode *);
202 extern int hfs_setxattr(struct dentry *dentry, const char *name,
203 const void *value, size_t size, int flags);
204 extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
205 void *value, size_t size);
206 extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
209 extern int hfs_mdb_get(struct super_block *);
210 extern void hfs_mdb_commit(struct super_block *);
211 extern void hfs_mdb_close(struct super_block *);
212 extern void hfs_mdb_put(struct super_block *);
215 extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
218 extern struct dentry_operations hfs_dentry_operations;
220 extern int hfs_hash_dentry(struct dentry *, struct qstr *);
221 extern int hfs_strcmp(const unsigned char *, unsigned int,
222 const unsigned char *, unsigned int);
223 extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
226 extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *);
227 extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);
229 extern struct timezone sys_tz;
232 * There are two time systems. Both are based on seconds since
233 * a particular time/date.
234 * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970
235 * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904
238 #define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60)
239 #define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60)
241 #define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode))
242 #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info)
244 #define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) }
245 #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec)
246 #define hfs_mtime() __hfs_u_to_mtime(get_seconds())
248 static inline const char *hfs_mdb_name(struct super_block *sb)
253 static inline void hfs_bitmap_dirty(struct super_block *sb)
255 set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
259 static inline void hfs_buffer_sync(struct buffer_head *bh)
261 while (buffer_locked(bh)) {
264 if (buffer_dirty(bh)) {
265 ll_rw_block(WRITE, 1, &bh);
270 #define sb_bread512(sb, sec, data) ({ \
271 struct buffer_head *__bh; \
276 __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
277 __block = __start >> (sb)->s_blocksize_bits; \
278 __offset = __start & ((sb)->s_blocksize - 1); \
279 __bh = sb_bread((sb), __block); \
280 if (likely(__bh != NULL)) \
281 data = (void *)(__bh->b_data + __offset);\