1 /* 2 * linux/include/linux/hfsplus_fs.h 3 * 4 * Copyright (C) 1999 5 * Brad Boyer (flar@pants.nu) 6 * (C) 2003 Ardis Technologies <roman@ardistech.com> 7 * 8 */ 9 10 #ifndef _LINUX_HFSPLUS_FS_H 11 #define _LINUX_HFSPLUS_FS_H 12 13 #include <linux/fs.h> 14 #include <linux/version.h> 15 #include "hfsplus_raw.h" 16 17 #define DBG_BNODE_REFS 0x00000001 18 #define DBG_BNODE_MOD 0x00000002 19 #define DBG_CAT_MOD 0x00000004 20 #define DBG_INODE 0x00000008 21 #define DBG_SUPER 0x00000010 22 #define DBG_EXTENT 0x00000020 23 24 //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD) 25 //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD) 26 //#define DBG_MASK (DBG_BNODE_REFS|DBG_INODE|DBG_BNODE_MOD) 27 #define DBG_MASK (0) 28 29 #define dprint(flg, fmt, args...) \ 30 if (flg & DBG_MASK) printk(fmt , ## args) 31 32 /* Runtime config options */ 33 #define HFSPLUS_CASE_ASIS 0 34 #define HFSPLUS_CASE_LOWER 1 35 36 #define HFSPLUS_FORK_RAW 0 37 #define HFSPLUS_FORK_CAP 1 38 #define HFSPLUS_FORK_DOUBLE 2 39 #define HFSPLUS_FORK_NETATALK 3 40 41 #define HFSPLUS_NAMES_TRIVIAL 0 42 #define HFSPLUS_NAMES_CAP 1 43 #define HFSPLUS_NAMES_NETATALK 2 44 #define HFSPLUS_NAMES_7BIT 3 45 46 #define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */ 47 48 #define HFSPLUS_TYPE_DATA 0x00 49 #define HFSPLUS_TYPE_RSRC 0xFF 50 51 typedef int (*btree_keycmp)(hfsplus_btree_key *, hfsplus_btree_key *); 52 53 #define NODE_HASH_SIZE 256 54 55 /* An HFS+ BTree held in memory */ 56 typedef struct hfsplus_btree { 57 struct super_block *sb; 58 struct inode *inode; 59 btree_keycmp keycmp; 60 61 u32 cnid; 62 u32 root; 63 u32 leaf_count; 64 u32 leaf_head; 65 u32 leaf_tail; 66 u32 node_count; 67 u32 free_nodes; 68 u32 attributes; 69 70 unsigned int node_size; 71 unsigned int node_size_shift; 72 unsigned int max_key_len; 73 unsigned int depth; 74 75 //unsigned int map1_size, map_size; 76 struct semaphore tree_lock; 77 78 unsigned int pages_per_bnode; 79 spinlock_t hash_lock; 80 struct hfsplus_bnode *node_hash[NODE_HASH_SIZE]; 81 int node_hash_cnt; 82 } hfsplus_btree; 83 84 struct page; 85 86 /* An HFS+ BTree node in memory */ 87 typedef struct hfsplus_bnode { 88 struct hfsplus_btree *tree; 89 90 u32 prev; 91 u32 this; 92 u32 next; 93 u32 parent; 94 95 u16 num_recs; 96 u8 kind; 97 u8 height; 98 99 struct hfsplus_bnode *next_hash; 100 unsigned long flags; 101 wait_queue_head_t lock_wq; 102 atomic_t refcnt; 103 unsigned int page_offset; 104 struct page *page[0]; 105 } hfsplus_bnode; 106 107 #define HFSPLUS_BNODE_LOCK 0 108 #define HFSPLUS_BNODE_ERROR 1 109 #define HFSPLUS_BNODE_NEW 2 110 #define HFSPLUS_BNODE_DIRTY 3 111 #define HFSPLUS_BNODE_DELETED 4 112 113 /* 114 * HFS+ superblock info (built from Volume Header on disk) 115 */ 116 117 struct hfsplus_vh; 118 struct hfsplus_btree; 119 120 struct hfsplus_sb_info { 121 struct buffer_head *s_vhbh; 122 struct hfsplus_vh *s_vhdr; 123 struct hfsplus_btree *ext_tree; 124 struct hfsplus_btree *cat_tree; 125 struct hfsplus_btree *attr_tree; 126 struct inode *alloc_file; 127 struct inode *hidden_dir; 128 129 /* Runtime variables */ 130 u32 blockoffset; 131 u32 sect_count; 132 //int a2b_shift; 133 134 /* Stuff in host order from Vol Header */ 135 u32 total_blocks; 136 u32 free_blocks; 137 u32 next_alloc; 138 u32 next_cnid; 139 u32 file_count; 140 u32 folder_count; 141 142 /* Config options */ 143 u32 creator; 144 u32 type; 145 146 int charcase; 147 int fork; 148 int namemap; 149 150 umode_t umask; 151 uid_t uid; 152 gid_t gid; 153 154 unsigned long flags; 155 156 atomic_t inode_cnt; 157 u32 last_inode_cnt; 158 159 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 160 struct list_head rsrc_inodes; 161 #else 162 struct hlist_head rsrc_inodes; 163 #endif 164 }; 165 166 #define HFSPLUS_SB_WRITEBACKUP 0x0001 167 168 169 struct hfsplus_inode_info { 170 /* Device number in hfsplus_permissions in catalog */ 171 u32 dev; 172 /* Allocation extents from catlog record or volume header */ 173 hfsplus_extent_rec extents; 174 u32 total_blocks, extent_blocks, alloc_blocks; 175 atomic_t opencnt; 176 177 struct inode *rsrc_inode; 178 unsigned long flags; 179 180 struct list_head open_dir_list; 181 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 182 unsigned long mmu_private; 183 #else 184 loff_t mmu_private; 185 struct inode vfs_inode; 186 #endif 187 }; 188 189 #define HFSPLUS_FLG_RSRC 0x0001 190 #define HFSPLUS_FLG_DIRTYMODE 0x0002 191 192 #define HFSPLUS_IS_DATA(inode) (!(HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC)) 193 #define HFSPLUS_IS_RSRC(inode) (HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC) 194 195 struct hfsplus_find_data { 196 /* filled by caller */ 197 hfsplus_btree_key *search_key; 198 hfsplus_btree_key *key; 199 /* filled by find */ 200 hfsplus_btree *tree; 201 hfsplus_bnode *bnode; 202 /* filled by findrec */ 203 int record, exact; 204 int keyoffset, keylength; 205 int entryoffset, entrylength; 206 }; 207 208 struct hfsplus_readdir_data { 209 struct list_head list; 210 struct file *file; 211 hfsplus_cat_key key; 212 }; 213 214 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 215 typedef long sector_t; 216 #endif 217 218 /* 219 * Functions in any *.c used in other files 220 */ 221 222 /* bfind.c */ 223 void hfsplus_find_rec(hfsplus_bnode *, struct hfsplus_find_data *); 224 int hfsplus_btree_find(struct hfsplus_find_data *); 225 int hfsplus_btree_find_entry(struct hfsplus_find_data *, 226 void *, int); 227 int hfsplus_btree_move(struct hfsplus_find_data *, int); 228 int hfsplus_find_init(hfsplus_btree *, struct hfsplus_find_data *); 229 void hfsplus_find_exit(struct hfsplus_find_data *); 230 231 /* bnode.c */ 232 struct buffer_head *hfsplus_getblk(struct inode *, unsigned long); 233 hfsplus_bnode *__hfsplus_find_bnode(hfsplus_btree *, u32); 234 void __hfsplus_bnode_remove(hfsplus_bnode *); 235 hfsplus_bnode *hfsplus_create_bnode(hfsplus_btree *, u32); 236 hfsplus_bnode *hfsplus_find_bnode(hfsplus_btree *, u32); 237 void hfsplus_get_bnode(hfsplus_bnode *); 238 void hfsplus_put_bnode(hfsplus_bnode *); 239 void hfsplus_bnode_free(hfsplus_bnode *); 240 void hfsplus_bnode_readbytes(hfsplus_bnode *, void *, unsigned long, unsigned long); 241 u16 hfsplus_bnode_read_u16(hfsplus_bnode *, unsigned long); 242 void hfsplus_bnode_writebytes(hfsplus_bnode *, void *, unsigned long, unsigned long); 243 void hfsplus_bnode_write_u16(hfsplus_bnode *, unsigned long, u16); 244 void hfsplus_bnode_copybytes(hfsplus_bnode *, unsigned long, 245 hfsplus_bnode *, unsigned long, unsigned long); 246 void hfsplus_bnode_movebytes(hfsplus_bnode *, unsigned long, unsigned long, unsigned long); 247 int hfsplus_bnode_insert_rec(struct hfsplus_find_data *, void *, int); 248 int hfsplus_bnode_remove_rec(struct hfsplus_find_data *); 249 250 /* brec.c */ 251 u16 hfsplus_brec_lenoff(hfsplus_bnode *, u16, u16 *); 252 u16 hfsplus_brec_keylen(hfsplus_bnode *, u16); 253 254 /* btree.c */ 255 hfsplus_btree *hfsplus_open_btree(struct super_block *, u32); 256 void hfsplus_close_btree(struct hfsplus_btree *); 257 void hfsplus_write_btree(struct hfsplus_btree *); 258 hfsplus_bnode *hfsplus_btree_alloc_node(hfsplus_btree *); 259 void hfsplus_btree_remove_node(hfsplus_bnode *); 260 void hfsplus_btree_free_node(hfsplus_bnode *); 261 262 /* catalog.c */ 263 int hfsplus_cmp_cat_key(hfsplus_btree_key *, hfsplus_btree_key *); 264 void hfsplus_fill_cat_key(hfsplus_btree_key *, u32, struct qstr *); 265 int hfsplus_find_cat(struct super_block *, unsigned long, struct hfsplus_find_data *); 266 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *); 267 int hfsplus_delete_cat(u32, struct inode *, struct qstr *); 268 int hfsplus_rename_cat(u32, struct inode *, struct qstr *, 269 struct inode *, struct qstr *); 270 271 /* extents.c */ 272 int hfsplus_cmp_ext_key(hfsplus_btree_key *, hfsplus_btree_key *); 273 void hfsplus_fill_ext_key(hfsplus_btree_key *, u32, u32, u8); 274 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int); 275 int hfsplus_free_fork(struct super_block *, u32, hfsplus_fork_raw *, int); 276 int hfsplus_extend_file(struct inode *); 277 void hfsplus_truncate(struct inode *); 278 279 /* inode.c */ 280 void hfsplus_inode_read_fork(struct inode *, hfsplus_fork_raw *); 281 void hfsplus_inode_write_fork(struct inode *, hfsplus_fork_raw *); 282 int hfsplus_cat_read_inode(struct inode *, struct hfsplus_find_data *); 283 void hfsplus_cat_write_inode(struct inode *); 284 struct inode *hfsplus_new_inode(struct super_block *, int); 285 void hfsplus_delete_inode(struct inode *); 286 287 extern struct address_space_operations hfsplus_btree_aops; 288 289 /* options.c */ 290 int parse_options(char *, struct hfsplus_sb_info *); 291 void fill_defaults(struct hfsplus_sb_info *); 292 void fill_current(struct hfsplus_sb_info *, struct hfsplus_sb_info *); 293 294 /* tables.c */ 295 extern u16 case_fold_table[]; 296 297 /* unicode.c */ 298 int hfsplus_unistrcmp(const hfsplus_unistr *, const hfsplus_unistr *); 299 int hfsplus_uni2asc(const hfsplus_unistr *, char *, int *); 300 int hfsplus_asc2uni(hfsplus_unistr *, const char *, int); 301 302 /* wrapper.c */ 303 int hfsplus_read_wrapper(struct super_block *); 304 305 /* access macros */ 306 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 307 #define HFSPLUS_SB(super) (*(struct hfsplus_sb_info *)&(super)->u) 308 #define HFSPLUS_I(inode) (*(struct hfsplus_inode_info *)&(inode)->u) 309 #else 310 /* 311 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb) 312 { 313 return sb->s_fs_info; 314 } 315 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode) 316 { 317 return list_entry(inode, struct hfsplus_inode_info, vfs_inode); 318 } 319 */ 320 #define HFSPLUS_SB(super) (*(struct hfsplus_sb_info *)(super)->s_fs_info) 321 #define HFSPLUS_I(inode) (*list_entry(inode, struct hfsplus_inode_info, vfs_inode)) 322 #endif 323 324 #if 1 325 #define hfsplus_kmap(p) ({ struct page *__p = (p); kmap(__p); }) 326 #define hfsplus_kunmap(p) ({ struct page *__p = (p); kunmap(__p); __p; }) 327 #else 328 #define hfsplus_kmap(p) kmap(p) 329 #define hfsplus_kunmap(p) kunmap(p) 330 #endif 331 332 /* time macros */ 333 #define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U) 334 #define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U)) 335 336 /* compatibility */ 337 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0) 338 #define PageUptodate(page) Page_Uptodate(page) 339 #define wait_on_page_locked(page) wait_on_page(page) 340 #define get_seconds() CURRENT_TIME 341 #define page_symlink(i,n,l) block_symlink(i,n,l) 342 #define map_bh(bh, sb, block) ({ \ 343 bh->b_dev = kdev_t_to_nr(sb->s_dev); \ 344 bh->b_blocknr = block; \ 345 bh->b_state |= (1UL << BH_Mapped); \ 346 }) 347 #define set_buffer_new(bh) (bh->b_state |= (1UL << BH_New)) 348 #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,21) 349 #define new_inode(sb) ({ \ 350 struct inode *inode = get_empty_inode(); \ 351 if (inode) { \ 352 inode->i_sb = sb; \ 353 inode->i_dev = sb->s_dev; \ 354 inode->i_blkbits = sb->s_blocksize_bits; \ 355 } \ 356 inode; \ 357 }) 358 #endif 359 #define hfsp_mt2ut(t) __hfsp_mt2ut(t) 360 #define hfsp_ut2mt(t) __hfsp_ut2mt(t) 361 #define hfsp_now2mt() __hfsp_ut2mt(CURRENT_TIME) 362 #else 363 #define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) } 364 #define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec) 365 #define hfsp_now2mt() __hfsp_ut2mt(get_seconds()) 366 #endif 367 368 #endif 369