fs/hfsplus/hfsplus_fs.h

   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/buffer_head.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 #define DBG_BITMAP      0x00000040
  24
  25 //#define DBG_MASK      (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
  26 //#define DBG_MASK      (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
  27 //#define DBG_MASK      (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
  28 #define DBG_MASK        (0)
  29
  30 #define dprint(flg, fmt, args...) \
  31         if (flg & DBG_MASK) printk(fmt , ## args)
  32
  33 /* Runtime config options */
  34 #define HFSPLUS_DEF_CR_TYPE    0x3F3F3F3F  /* '????' */
  35
  36 #define HFSPLUS_TYPE_DATA 0x00
  37 #define HFSPLUS_TYPE_RSRC 0xFF
  38
  39 typedef int (*btree_keycmp)(hfsplus_btree_key *, hfsplus_btree_key *);
  40
  41 #define NODE_HASH_SIZE  256
  42
  43 /* An HFS+ BTree held in memory */
  44 struct hfs_btree {
  45         struct super_block *sb;
  46         struct inode *inode;
  47         btree_keycmp keycmp;
  48
  49         u32 cnid;
  50         u32 root;
  51         u32 leaf_count;
  52         u32 leaf_head;
  53         u32 leaf_tail;
  54         u32 node_count;
  55         u32 free_nodes;
  56         u32 attributes;
  57
  58         unsigned int node_size;
  59         unsigned int node_size_shift;
  60         unsigned int max_key_len;
  61         unsigned int depth;
  62
  63         //unsigned int map1_size, map_size;
  64         struct semaphore tree_lock;
  65
  66         unsigned int pages_per_bnode;
  67         spinlock_t hash_lock;
  68         struct hfs_bnode *node_hash[NODE_HASH_SIZE];
  69         int node_hash_cnt;
  70 };
  71
  72 struct page;
  73
  74 /* An HFS+ BTree node in memory */
  75 struct hfs_bnode {
  76         struct hfs_btree *tree;
  77
  78         u32 prev;
  79         u32 this;
  80         u32 next;
  81         u32 parent;
  82
  83         u16 num_recs;
  84         u8 type;
  85         u8 height;
  86
  87         struct hfs_bnode *next_hash;
  88         unsigned long flags;
  89         wait_queue_head_t lock_wq;
  90         atomic_t refcnt;
  91         unsigned int page_offset;
  92         struct page *page[0];
  93 };
  94
  95 #define HFS_BNODE_LOCK          0
  96 #define HFS_BNODE_ERROR         1
  97 #define HFS_BNODE_NEW           2
  98 #define HFS_BNODE_DIRTY         3
  99 #define HFS_BNODE_DELETED       4
 100
 101 /*
 102  * HFS+ superblock info (built from Volume Header on disk)
 103  */
 104
 105 struct hfsplus_vh;
 106 struct hfs_btree;
 107
 108 struct hfsplus_sb_info {
 109         struct buffer_head *s_vhbh;
 110         struct hfsplus_vh *s_vhdr;
 111         struct hfs_btree *ext_tree;
 112         struct hfs_btree *cat_tree;
 113         struct hfs_btree *attr_tree;
 114         struct inode *alloc_file;
 115         struct inode *hidden_dir;
 116         struct nls_table *nls;
 117
 118         /* Runtime variables */
 119         u32 blockoffset;
 120         u32 sect_count;
 121         int fs_shift;
 122
 123         /* Stuff in host order from Vol Header */
 124         u32 alloc_blksz;
 125         int alloc_blksz_shift;
 126         u32 total_blocks;
 127         u32 free_blocks;
 128         u32 next_alloc;
 129         u32 next_cnid;
 130         u32 file_count;
 131         u32 folder_count;
 132         u32 data_clump_blocks, rsrc_clump_blocks;
 133
 134         /* Config options */
 135         u32 creator;
 136         u32 type;
 137
 138         umode_t umask;
 139         uid_t uid;
 140         gid_t gid;
 141
 142         int part, session;
 143
 144         unsigned long flags;
 145
 146         atomic_t inode_cnt;
 147         u32 last_inode_cnt;
 148
 149         struct hlist_head rsrc_inodes;
 150 };
 151
 152 #define HFSPLUS_SB_WRITEBACKUP  0x0001
 153 #define HFSPLUS_SB_NODECOMPOSE  0x0002
 154
 155
 156 struct hfsplus_inode_info {
 157         struct semaphore extents_lock;
 158         u32 clump_blocks, alloc_blocks;
 159         sector_t fs_blocks;
 160         /* Allocation extents from catalog record or volume header */
 161         hfsplus_extent_rec first_extents;
 162         u32 first_blocks;
 163         hfsplus_extent_rec cached_extents;
 164         u32 cached_start, cached_blocks;
 165         atomic_t opencnt;
 166
 167         struct inode *rsrc_inode;
 168         unsigned long flags;
 169
 170         /* Device number in hfsplus_permissions in catalog */
 171         u32 dev;
 172         /* BSD system and user file flags */
 173         u8 rootflags;
 174         u8 userflags;
 175
 176         struct list_head open_dir_list;
 177         loff_t phys_size;
 178         struct inode vfs_inode;
 179 };
 180
 181 #define HFSPLUS_FLG_RSRC        0x0001
 182 #define HFSPLUS_FLG_EXT_DIRTY   0x0002
 183 #define HFSPLUS_FLG_EXT_NEW     0x0004
 184
 185 #define HFSPLUS_IS_DATA(inode)   (!(HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC))
 186 #define HFSPLUS_IS_RSRC(inode)   (HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC)
 187
 188 struct hfs_find_data {
 189         /* filled by caller */
 190         hfsplus_btree_key *search_key;
 191         hfsplus_btree_key *key;
 192         /* filled by find */
 193         struct hfs_btree *tree;
 194         struct hfs_bnode *bnode;
 195         /* filled by findrec */
 196         int record;
 197         int keyoffset, keylength;
 198         int entryoffset, entrylength;
 199 };
 200
 201 struct hfsplus_readdir_data {
 202         struct list_head list;
 203         struct file *file;
 204         struct hfsplus_cat_key key;
 205 };
 206
 207 #define hfs_btree_open hfsplus_btree_open
 208 #define hfs_btree_close hfsplus_btree_close
 209 #define hfs_btree_write hfsplus_btree_write
 210 #define hfs_bmap_alloc hfsplus_bmap_alloc
 211 #define hfs_bmap_free hfsplus_bmap_free
 212 #define hfs_bnode_read hfsplus_bnode_read
 213 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16
 214 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8
 215 #define hfs_bnode_read_key hfsplus_bnode_read_key
 216 #define hfs_bnode_write hfsplus_bnode_write
 217 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16
 218 #define hfs_bnode_clear hfsplus_bnode_clear
 219 #define hfs_bnode_copy hfsplus_bnode_copy
 220 #define hfs_bnode_move hfsplus_bnode_move
 221 #define hfs_bnode_dump hfsplus_bnode_dump
 222 #define hfs_bnode_unlink hfsplus_bnode_unlink
 223 #define hfs_bnode_findhash hfsplus_bnode_findhash
 224 #define hfs_bnode_find hfsplus_bnode_find
 225 #define hfs_bnode_unhash hfsplus_bnode_unhash
 226 #define hfs_bnode_free hfsplus_bnode_free
 227 #define hfs_bnode_create hfsplus_bnode_create
 228 #define hfs_bnode_get hfsplus_bnode_get
 229 #define hfs_bnode_put hfsplus_bnode_put
 230 #define hfs_brec_lenoff hfsplus_brec_lenoff
 231 #define hfs_brec_keylen hfsplus_brec_keylen
 232 #define hfs_brec_insert hfsplus_brec_insert
 233 #define hfs_brec_remove hfsplus_brec_remove
 234 #define hfs_find_init hfsplus_find_init
 235 #define hfs_find_exit hfsplus_find_exit
 236 #define __hfs_brec_find __hplusfs_brec_find
 237 #define hfs_brec_find hfsplus_brec_find
 238 #define hfs_brec_read hfsplus_brec_read
 239 #define hfs_brec_goto hfsplus_brec_goto
 240 #define hfs_part_find hfsplus_part_find
 241
 242 /*
 243  * definitions for ext2 flag ioctls (linux really needs a generic
 244  * interface for this).
 245  */
 246
 247 /* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
 248  * chattr/lsattr */
 249 #define HFSPLUS_IOC_EXT2_GETFLAGS       _IOR('f', 1, long)
 250 #define HFSPLUS_IOC_EXT2_SETFLAGS       _IOW('f', 2, long)
 251
 252 #define EXT2_FLAG_IMMUTABLE             0x00000010 /* Immutable file */
 253 #define EXT2_FLAG_APPEND                0x00000020 /* writes to file may only append */
 254 #define EXT2_FLAG_NODUMP                0x00000040 /* do not dump file */
 255
 256
 257 /*
 258  * Functions in any *.c used in other files
 259  */
 260
 261 /* bitmap.c */
 262 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
 263 int hfsplus_block_free(struct super_block *, u32, u32);
 264
 265 /* btree.c */
 266 struct hfs_btree *hfs_btree_open(struct super_block *, u32);
 267 void hfs_btree_close(struct hfs_btree *);
 268 void hfs_btree_write(struct hfs_btree *);
 269 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
 270 void hfs_bmap_free(struct hfs_bnode *);
 271
 272 /* bnode.c */
 273 void hfs_bnode_read(struct hfs_bnode *, void *, int, int);
 274 u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
 275 u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
 276 void hfs_bnode_read_key(struct hfs_bnode *, void *, int);
 277 void hfs_bnode_write(struct hfs_bnode *, void *, int, int);
 278 void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
 279 void hfs_bnode_clear(struct hfs_bnode *, int, int);
 280 void hfs_bnode_copy(struct hfs_bnode *, int,
 281                     struct hfs_bnode *, int, int);
 282 void hfs_bnode_move(struct hfs_bnode *, int, int, int);
 283 void hfs_bnode_dump(struct hfs_bnode *);
 284 void hfs_bnode_unlink(struct hfs_bnode *);
 285 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32);
 286 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32);
 287 void hfs_bnode_unhash(struct hfs_bnode *);
 288 void hfs_bnode_free(struct hfs_bnode *);
 289 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32);
 290 void hfs_bnode_get(struct hfs_bnode *);
 291 void hfs_bnode_put(struct hfs_bnode *);
 292
 293 /* brec.c */
 294 u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *);
 295 u16 hfs_brec_keylen(struct hfs_bnode *, u16);
 296 int hfs_brec_insert(struct hfs_find_data *, void *, int);
 297 int hfs_brec_remove(struct hfs_find_data *);
 298
 299 /* bfind.c */
 300 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
 301 void hfs_find_exit(struct hfs_find_data *);
 302 int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *);
 303 int hfs_brec_find(struct hfs_find_data *);
 304 int hfs_brec_read(struct hfs_find_data *, void *, int);
 305 int hfs_brec_goto(struct hfs_find_data *, int);
 306
 307 /* catalog.c */
 308 int hfsplus_cat_cmp_key(hfsplus_btree_key *, hfsplus_btree_key *);
 309 void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *, u32, struct qstr *);
 310 int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *);
 311 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
 312 int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
 313 int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
 314                        struct inode *, struct qstr *);
 315
 316 /* extents.c */
 317 int hfsplus_ext_cmp_key(hfsplus_btree_key *, hfsplus_btree_key *);
 318 void hfsplus_ext_write_extent(struct inode *);
 319 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
 320 int hfsplus_free_fork(struct super_block *, u32, struct hfsplus_fork_raw *, int);
 321 int hfsplus_file_extend(struct inode *);
 322 void hfsplus_file_truncate(struct inode *);
 323
 324 /* inode.c */
 325 extern struct address_space_operations hfsplus_aops;
 326 extern struct address_space_operations hfsplus_btree_aops;
 327
 328 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
 329 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
 330 int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
 331 int hfsplus_cat_write_inode(struct inode *);
 332 struct inode *hfsplus_new_inode(struct super_block *, int);
 333 void hfsplus_delete_inode(struct inode *);
 334
 335 /* ioctl.c */
 336 int hfsplus_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 337                   unsigned long arg);
 338 int hfsplus_setxattr(struct dentry *dentry, const char *name,
 339                      const void *value, size_t size, int flags);
 340 ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
 341                          void *value, size_t size);
 342 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
 343
 344 /* options.c */
 345 int hfsplus_parse_options(char *, struct hfsplus_sb_info *);
 346 void hfsplus_fill_defaults(struct hfsplus_sb_info *);
 347 int hfsplus_show_options(struct seq_file *, struct vfsmount *);
 348
 349 /* tables.c */
 350 extern u16 hfsplus_case_fold_table[];
 351 extern u16 hfsplus_decompose_table[];
 352 extern u16 hfsplus_compose_table[];
 353
 354 /* unicode.c */
 355 int hfsplus_unistrcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
 356 int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *);
 357 int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int);
 358
 359 /* wrapper.c */
 360 int hfsplus_read_wrapper(struct super_block *);
 361
 362 int hfs_part_find(struct super_block *, sector_t *, sector_t *);
 363
 364 /* access macros */
 365 /*
 366 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
 367 {
 368         return sb->s_fs_info;
 369 }
 370 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
 371 {
 372         return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
 373 }
 374 */
 375 #define HFSPLUS_SB(super)       (*(struct hfsplus_sb_info *)(super)->s_fs_info)
 376 #define HFSPLUS_I(inode)        (*list_entry(inode, struct hfsplus_inode_info, vfs_inode))
 377
 378 #if 1
 379 #define hfsplus_kmap(p)         ({ struct page *__p = (p); kmap(__p); })
 380 #define hfsplus_kunmap(p)       ({ struct page *__p = (p); kunmap(__p); __p; })
 381 #else
 382 #define hfsplus_kmap(p)         kmap(p)
 383 #define hfsplus_kunmap(p)       kunmap(p)
 384 #endif
 385
 386 #define sb_bread512(sb, sec, data) ({                   \
 387         struct buffer_head *__bh;                       \
 388         sector_t __block;                               \
 389         loff_t __start;                                 \
 390         int __offset;                                   \
 391                                                         \
 392         __start = (loff_t)(sec) << HFSPLUS_SECTOR_SHIFT;\
 393         __block = __start >> (sb)->s_blocksize_bits;    \
 394         __offset = __start & ((sb)->s_blocksize - 1);   \
 395         __bh = sb_bread((sb), __block);                 \
 396         if (likely(__bh != NULL))                       \
 397                 data = (void *)(__bh->b_data + __offset);\
 398         else                                            \
 399                 data = NULL;                            \
 400         __bh;                                           \
 401 })
 402
 403 /* time macros */
 404 #define __hfsp_mt2ut(t)         (be32_to_cpu(t) - 2082844800U)
 405 #define __hfsp_ut2mt(t)         (cpu_to_be32(t + 2082844800U))
 406
 407 /* compatibility */
 408 #define hfsp_mt2ut(t)           (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
 409 #define hfsp_ut2mt(t)           __hfsp_ut2mt((t).tv_sec)
 410 #define hfsp_now2mt()           __hfsp_ut2mt(get_seconds())
 411
 412 #define kdev_t_to_nr(x)         (x)
 413
 414 #endif