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/version.h> 13 #include <linux/slab.h> 14 #include <linux/types.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 #define hfs_warn(format, args...) printk(KERN_WARNING format , ## args) 40 #define hfs_error(format, args...) printk(KERN_ERR format , ## args) 41 42 /* 43 * struct hfs_inode_info 44 * 45 * The HFS-specific part of a Linux (struct inode) 46 */ 47 struct hfs_inode_info { 48 atomic_t opencnt; 49 50 unsigned int flags; 51 52 /* to deal with localtime ugliness */ 53 int tz_secondswest; 54 55 struct hfs_cat_key cat_key; 56 57 struct list_head open_dir_list; 58 struct inode *rsrc_inode; 59 60 struct semaphore extents_lock; 61 62 u16 alloc_blocks, clump_blocks; 63 sector_t fs_blocks; 64 /* Allocation extents from catlog record or volume header */ 65 hfs_extent_rec first_extents; 66 u16 first_blocks; 67 hfs_extent_rec cached_extents; 68 u16 cached_start, cached_blocks; 69 70 loff_t phys_size; 71 struct inode vfs_inode; 72 }; 73 74 #define HFS_FLG_RSRC 0x0001 75 #define HFS_FLG_EXT_DIRTY 0x0002 76 #define HFS_FLG_EXT_NEW 0x0004 77 78 #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC) 79 80 /* 81 * struct hfs_sb_info 82 * 83 * The HFS-specific part of a Linux (struct super_block) 84 */ 85 struct hfs_sb_info { 86 struct buffer_head *mdb_bh; /* The hfs_buffer 87 holding the real 88 superblock (aka VIB 89 or MDB) */ 90 struct hfs_mdb *mdb; 91 struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding 92 the alternate superblock */ 93 struct hfs_mdb *alt_mdb; 94 __be32 *bitmap; /* The page holding the 95 allocation bitmap */ 96 struct hfs_btree *ext_tree; /* Information about 97 the extents b-tree */ 98 struct hfs_btree *cat_tree; /* Information about 99 the catalog b-tree */ 100 u32 file_count; /* The number of 101 regular files in 102 the filesystem */ 103 u32 folder_count; /* The number of 104 directories in the 105 filesystem */ 106 u32 next_id; /* The next available 107 file id number */ 108 u32 clumpablks; /* The number of allocation 109 blocks to try to add when 110 extending a file */ 111 u32 fs_start; /* The first 512-byte 112 block represented 113 in the bitmap */ 114 u32 part_start; 115 u16 root_files; /* The number of 116 regular 117 (non-directory) 118 files in the root 119 directory */ 120 u16 root_dirs; /* The number of 121 directories in the 122 root directory */ 123 u16 fs_ablocks; /* The number of 124 allocation blocks 125 in the filesystem */ 126 u16 free_ablocks; /* the number of unused 127 allocation blocks 128 in the filesystem */ 129 u32 alloc_blksz; /* The size of an 130 "allocation block" */ 131 int s_quiet; /* Silent failure when 132 changing owner or mode? */ 133 __be32 s_type; /* Type for new files */ 134 __be32 s_creator; /* Creator for new files */ 135 umode_t s_file_umask; /* The umask applied to the 136 permissions on all files */ 137 umode_t s_dir_umask; /* The umask applied to the 138 permissions on all dirs */ 139 uid_t s_uid; /* The uid of all files */ 140 gid_t s_gid; /* The gid of all files */ 141 142 int session, part; 143 144 struct semaphore bitmap_lock; 145 146 unsigned long flags; 147 148 u16 blockoffset; 149 150 int fs_div; 151 152 struct hlist_head rsrc_inodes; 153 }; 154 155 #define HFS_FLG_BITMAP_DIRTY 0 156 #define HFS_FLG_MDB_DIRTY 1 157 #define HFS_FLG_ALT_MDB_DIRTY 2 158 159 /* bitmap.c */ 160 extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *); 161 extern int hfs_clear_vbm_bits(struct super_block *, u16, u16); 162 163 /* catalog.c */ 164 extern int hfs_cat_keycmp(const btree_key *, const btree_key *); 165 struct hfs_find_data; 166 extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *); 167 extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *); 168 extern int hfs_cat_delete(u32, struct inode *, struct qstr *); 169 extern int hfs_cat_move(u32, struct inode *, struct qstr *, 170 struct inode *, struct qstr *); 171 extern void hfs_cat_build_key(btree_key *, u32, struct qstr *); 172 173 /* dir.c */ 174 extern struct file_operations hfs_dir_operations; 175 extern struct inode_operations hfs_dir_inode_operations; 176 177 /* extent.c */ 178 extern int hfs_ext_keycmp(const btree_key *, const btree_key *); 179 extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int); 180 extern void hfs_ext_write_extent(struct inode *); 181 extern int hfs_extend_file(struct inode *); 182 extern void hfs_file_truncate(struct inode *); 183 184 extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int); 185 186 /* inode.c */ 187 extern struct address_space_operations hfs_aops; 188 extern struct address_space_operations hfs_btree_aops; 189 190 extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int); 191 extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *); 192 extern int hfs_write_inode(struct inode *, int); 193 extern int hfs_inode_setattr(struct dentry *, struct iattr *); 194 extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, 195 __be32 log_size, __be32 phys_size, u32 clump_size); 196 extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *); 197 extern void hfs_clear_inode(struct inode *); 198 extern void hfs_delete_inode(struct inode *); 199 200 /* attr.c */ 201 extern int hfs_setxattr(struct dentry *dentry, const char *name, 202 const void *value, size_t size, int flags); 203 extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name, 204 void *value, size_t size); 205 extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 206 207 /* mdb.c */ 208 extern int hfs_mdb_get(struct super_block *); 209 extern void hfs_mdb_commit(struct super_block *); 210 extern void hfs_mdb_close(struct super_block *); 211 extern void hfs_mdb_put(struct super_block *); 212 213 /* part_tbl.c */ 214 extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); 215 216 /* string.c */ 217 extern struct dentry_operations hfs_dentry_operations; 218 219 extern int hfs_hash_dentry(struct dentry *, struct qstr *); 220 extern int hfs_strcmp(const unsigned char *, unsigned int, 221 const unsigned char *, unsigned int); 222 extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *); 223 224 /* trans.c */ 225 extern void hfs_triv2mac(struct hfs_name *, struct qstr *); 226 extern int hfs_mac2triv(char *, const struct hfs_name *); 227 228 extern struct timezone sys_tz; 229 230 /* 231 * There are two time systems. Both are based on seconds since 232 * a particular time/date. 233 * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970 234 * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904 235 * 236 */ 237 #define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60) 238 #define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60) 239 240 #define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode)) 241 #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info) 242 243 #define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) } 244 #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec) 245 #define hfs_mtime() __hfs_u_to_mtime(get_seconds()) 246 247 static inline const char *hfs_mdb_name(struct super_block *sb) 248 { 249 return sb->s_id; 250 } 251 252 static inline void hfs_bitmap_dirty(struct super_block *sb) 253 { 254 set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags); 255 sb->s_dirt = 1; 256 } 257 258 static inline void hfs_buffer_sync(struct buffer_head *bh) 259 { 260 while (buffer_locked(bh)) { 261 wait_on_buffer(bh); 262 } 263 if (buffer_dirty(bh)) { 264 ll_rw_block(WRITE, 1, &bh); 265 wait_on_buffer(bh); 266 } 267 } 268 269 #define sb_bread512(sb, sec, data) ({ \ 270 struct buffer_head *__bh; \ 271 sector_t __block; \ 272 loff_t __start; \ 273 int __offset; \ 274 \ 275 __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\ 276 __block = __start >> (sb)->s_blocksize_bits; \ 277 __offset = __start & ((sb)->s_blocksize - 1); \ 278 __bh = sb_bread((sb), __block); \ 279 if (likely(__bh != NULL)) \ 280 data = (void *)(__bh->b_data + __offset);\ 281 else \ 282 data = NULL; \ 283 __bh; \ 284 }) 285 286 #endif 287