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/buffer_head.h> 15 #include <linux/fs.h> 16 17 #include <asm/byteorder.h> 18 #include <asm/uaccess.h> 19 20 #include "hfs.h" 21 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 29 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) 33 #define DBG_MASK (0) 34 35 #define dprint(flg, fmt, args...) \ 36 if (flg & DBG_MASK) printk(fmt , ## args) 37 38 #define hfs_warn(format, args...) printk(KERN_WARNING format , ## args) 39 #define hfs_error(format, args...) printk(KERN_ERR format , ## args) 40 41 /* 42 * struct hfs_inode_info 43 * 44 * The HFS-specific part of a Linux (struct inode) 45 */ 46 struct hfs_inode_info { 47 atomic_t opencnt; 48 49 unsigned int flags; 50 51 /* to deal with localtime ugliness */ 52 int tz_secondswest; 53 54 struct hfs_cat_key cat_key; 55 56 struct list_head open_dir_list; 57 struct inode *rsrc_inode; 58 59 struct semaphore extents_lock; 60 61 u16 alloc_blocks, clump_blocks; 62 sector_t fs_blocks; 63 /* Allocation extents from catlog record or volume header */ 64 hfs_extent_rec first_extents; 65 u16 first_blocks; 66 hfs_extent_rec cached_extents; 67 u16 cached_start, cached_blocks; 68 69 loff_t phys_size; 70 struct inode vfs_inode; 71 }; 72 73 #define HFS_FLG_RSRC 0x0001 74 #define HFS_FLG_EXT_DIRTY 0x0002 75 #define HFS_FLG_EXT_NEW 0x0004 76 77 #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC) 78 79 /* 80 * struct hfs_sb_info 81 * 82 * The HFS-specific part of a Linux (struct super_block) 83 */ 84 struct hfs_sb_info { 85 struct buffer_head *mdb_bh; /* The hfs_buffer 86 holding the real 87 superblock (aka VIB 88 or MDB) */ 89 struct hfs_mdb *mdb; 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 94 allocation bitmap */ 95 struct hfs_btree *ext_tree; /* Information about 96 the extents b-tree */ 97 struct hfs_btree *cat_tree; /* Information about 98 the catalog b-tree */ 99 u32 file_count; /* The number of 100 regular files in 101 the filesystem */ 102 u32 folder_count; /* The number of 103 directories in the 104 filesystem */ 105 u32 next_id; /* The next available 106 file id number */ 107 u32 clumpablks; /* The number of allocation 108 blocks to try to add when 109 extending a file */ 110 u32 fs_start; /* The first 512-byte 111 block represented 112 in the bitmap */ 113 u32 part_start; 114 u16 root_files; /* The number of 115 regular 116 (non-directory) 117 files in the root 118 directory */ 119 u16 root_dirs; /* The number of 120 directories in the 121 root directory */ 122 u16 fs_ablocks; /* The number of 123 allocation blocks 124 in the filesystem */ 125 u16 free_ablocks; /* the number of unused 126 allocation blocks 127 in the filesystem */ 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 */ 140 141 int session, part; 142 143 struct nls_table *nls_io, *nls_disk; 144 145 struct semaphore bitmap_lock; 146 147 unsigned long flags; 148 149 u16 blockoffset; 150 151 int fs_div; 152 153 struct hlist_head rsrc_inodes; 154 }; 155 156 #define HFS_FLG_BITMAP_DIRTY 0 157 #define HFS_FLG_MDB_DIRTY 1 158 #define HFS_FLG_ALT_MDB_DIRTY 2 159 160 /* bitmap.c */ 161 extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *); 162 extern int hfs_clear_vbm_bits(struct super_block *, u16, u16); 163 164 /* catalog.c */ 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 *); 173 174 /* dir.c */ 175 extern struct file_operations hfs_dir_operations; 176 extern struct inode_operations hfs_dir_inode_operations; 177 178 /* extent.c */ 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 *); 184 185 extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int); 186 187 /* inode.c */ 188 extern struct address_space_operations hfs_aops; 189 extern struct address_space_operations hfs_btree_aops; 190 191 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 *); 200 201 /* attr.c */ 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); 207 208 /* mdb.c */ 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 *); 213 214 /* part_tbl.c */ 215 extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); 216 217 /* string.c */ 218 extern struct dentry_operations hfs_dentry_operations; 219 220 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 *); 224 225 /* trans.c */ 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 *); 228 229 extern struct timezone sys_tz; 230 231 /* 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 236 * 237 */ 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) 240 241 #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) 243 244 #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()) 247 248 static inline const char *hfs_mdb_name(struct super_block *sb) 249 { 250 return sb->s_id; 251 } 252 253 static inline void hfs_bitmap_dirty(struct super_block *sb) 254 { 255 set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags); 256 sb->s_dirt = 1; 257 } 258 259 static inline void hfs_buffer_sync(struct buffer_head *bh) 260 { 261 while (buffer_locked(bh)) { 262 wait_on_buffer(bh); 263 } 264 if (buffer_dirty(bh)) { 265 ll_rw_block(WRITE, 1, &bh); 266 wait_on_buffer(bh); 267 } 268 } 269 270 #define sb_bread512(sb, sec, data) ({ \ 271 struct buffer_head *__bh; \ 272 sector_t __block; \ 273 loff_t __start; \ 274 int __offset; \ 275 \ 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);\ 282 else \ 283 data = NULL; \ 284 __bh; \ 285 }) 286 287 #endif 288