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/mutex.h>
  15 #include <linux/buffer_head.h>
  16 #include "hfsplus_raw.h"
  17
  18 #define DBG_BNODE_REFS  0x00000001
  19 #define DBG_BNODE_MOD   0x00000002
  20 #define DBG_CAT_MOD     0x00000004
  21 #define DBG_INODE       0x00000008
  22 #define DBG_SUPER       0x00000010
  23 #define DBG_EXTENT      0x00000020
  24 #define DBG_BITMAP      0x00000040
  25
  26 //#define DBG_MASK      (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
  27 //#define DBG_MASK      (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
  28 //#define DBG_MASK      (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
  29 #define DBG_MASK        (0)
  30
  31 #define dprint(flg, fmt, args...) \
  32         if (flg & DBG_MASK) printk(fmt , ## args)
  33
  34 /* Runtime config options */
  35 #define HFSPLUS_DEF_CR_TYPE    0x3F3F3F3F  /* '????' */
  36
  37 #define HFSPLUS_TYPE_DATA 0x00
  38 #define HFSPLUS_TYPE_RSRC 0xFF
  39
  40 typedef int (*btree_keycmp)(const hfsplus_btree_key *, const hfsplus_btree_key *);
  41
  42 #define NODE_HASH_SIZE  256
  43
  44 /* An HFS+ BTree held in memory */
  45 struct hfs_btree {
  46         struct super_block *sb;
  47         struct inode *inode;
  48         btree_keycmp keycmp;
  49
  50         u32 cnid;
  51         u32 root;
  52         u32 leaf_count;
  53         u32 leaf_head;
  54         u32 leaf_tail;
  55         u32 node_count;
  56         u32 free_nodes;
  57         u32 attributes;
  58
  59         unsigned int node_size;
  60         unsigned int node_size_shift;
  61         unsigned int max_key_len;
  62         unsigned int depth;
  63
  64         //unsigned int map1_size, map_size;
  65         struct mutex tree_lock;
  66
  67         unsigned int pages_per_bnode;
  68         spinlock_t hash_lock;
  69         struct hfs_bnode *node_hash[NODE_HASH_SIZE];
  70         int node_hash_cnt;
  71 };
  72
  73 struct page;
  74
  75 /* An HFS+ BTree node in memory */
  76 struct hfs_bnode {
  77         struct hfs_btree *tree;
  78
  79         u32 prev;
  80         u32 this;
  81         u32 next;
  82         u32 parent;
  83
  84         u16 num_recs;
  85         u8 type;
  86         u8 height;
  87
  88         struct hfs_bnode *next_hash;
  89         unsigned long flags;
  90         wait_queue_head_t lock_wq;
  91         atomic_t refcnt;
  92         unsigned int page_offset;
  93         struct page *page[0];
  94 };
  95
  96 #define HFS_BNODE_LOCK          0
  97 #define HFS_BNODE_ERROR         1
  98 #define HFS_BNODE_NEW           2
  99 #define HFS_BNODE_DIRTY         3
 100 #define HFS_BNODE_DELETED       4
 101
 102 /*
 103  * HFS+ superblock info (built from Volume Header on disk)
 104  */
 105
 106 struct hfsplus_vh;
 107 struct hfs_btree;
 108
 109 struct hfsplus_sb_info {
 110         struct buffer_head *s_vhbh;
 111         struct hfsplus_vh *s_vhdr;
 112         struct hfs_btree *ext_tree;
 113         struct hfs_btree *cat_tree;
 114         struct hfs_btree *attr_tree;
 115         struct inode *alloc_file;
 116         struct inode *hidden_dir;
 117         struct nls_table *nls;
 118
 119         /* Runtime variables */
 120         u32 blockoffset;
 121         u32 sect_count;
 122         int fs_shift;
 123
 124         /* immutable data from the volume header */
 125         u32 alloc_blksz;
 126         int alloc_blksz_shift;
 127         u32 total_blocks;
 128         u32 data_clump_blocks, rsrc_clump_blocks;
 129
 130         /* mutable data from the volume header, protected by alloc_mutex */
 131         u32 free_blocks;
 132         struct mutex alloc_mutex;
 133
 134         /* mutable data from the volume header, protected by vh_mutex */
 135         u32 next_cnid;
 136         u32 file_count;
 137         u32 folder_count;
 138         struct mutex vh_mutex;
 139
 140         /* Config options */
 141         u32 creator;
 142         u32 type;
 143
 144         umode_t umask;
 145         uid_t uid;
 146         gid_t gid;
 147
 148         int part, session;
 149
 150         unsigned long flags;
 151 };
 152
 153 #define HFSPLUS_SB_WRITEBACKUP  0
 154 #define HFSPLUS_SB_NODECOMPOSE  1
 155 #define HFSPLUS_SB_FORCE        2
 156 #define HFSPLUS_SB_HFSX         3
 157 #define HFSPLUS_SB_CASEFOLD     4
 158
 159
 160 struct hfsplus_inode_info {
 161         atomic_t opencnt;
 162
 163         /*
 164          * Extent allocation information, protected by extents_lock.
 165          */
 166         u32 first_blocks;
 167         u32 clump_blocks;
 168         u32 alloc_blocks;
 169         u32 cached_start;
 170         u32 cached_blocks;
 171         hfsplus_extent_rec first_extents;
 172         hfsplus_extent_rec cached_extents;
 173         unsigned long flags;
 174         struct mutex extents_lock;
 175
 176         /*
 177          * Immutable data.
 178          */
 179         struct inode *rsrc_inode;
 180         __be32 create_date;
 181
 182         /*
 183          * Protected by sbi->vh_mutex.
 184          */
 185         u32 linkid;
 186
 187         /*
 188          * Protected by i_mutex.
 189          */
 190         sector_t fs_blocks;
 191         u8 userflags;           /* BSD user file flags */
 192         struct list_head open_dir_list;
 193         loff_t phys_size;
 194
 195         struct inode vfs_inode;
 196 };
 197
 198 #define HFSPLUS_FLG_RSRC        0x0001
 199 #define HFSPLUS_FLG_EXT_DIRTY   0x0002
 200 #define HFSPLUS_FLG_EXT_NEW     0x0004
 201
 202 #define HFSPLUS_IS_DATA(inode)   (!(HFSPLUS_I(inode)->flags & HFSPLUS_FLG_RSRC))
 203 #define HFSPLUS_IS_RSRC(inode)   (HFSPLUS_I(inode)->flags & HFSPLUS_FLG_RSRC)
 204
 205 struct hfs_find_data {
 206         /* filled by caller */
 207         hfsplus_btree_key *search_key;
 208         hfsplus_btree_key *key;
 209         /* filled by find */
 210         struct hfs_btree *tree;
 211         struct hfs_bnode *bnode;
 212         /* filled by findrec */
 213         int record;
 214         int keyoffset, keylength;
 215         int entryoffset, entrylength;
 216 };
 217
 218 struct hfsplus_readdir_data {
 219         struct list_head list;
 220         struct file *file;
 221         struct hfsplus_cat_key key;
 222 };
 223
 224 #define hfs_btree_open hfsplus_btree_open
 225 #define hfs_btree_close hfsplus_btree_close
 226 #define hfs_btree_write hfsplus_btree_write
 227 #define hfs_bmap_alloc hfsplus_bmap_alloc
 228 #define hfs_bmap_free hfsplus_bmap_free
 229 #define hfs_bnode_read hfsplus_bnode_read
 230 #define hfs_bnode_read_u16 hfsplus_bnode_read_u16
 231 #define hfs_bnode_read_u8 hfsplus_bnode_read_u8
 232 #define hfs_bnode_read_key hfsplus_bnode_read_key
 233 #define hfs_bnode_write hfsplus_bnode_write
 234 #define hfs_bnode_write_u16 hfsplus_bnode_write_u16
 235 #define hfs_bnode_clear hfsplus_bnode_clear
 236 #define hfs_bnode_copy hfsplus_bnode_copy
 237 #define hfs_bnode_move hfsplus_bnode_move
 238 #define hfs_bnode_dump hfsplus_bnode_dump
 239 #define hfs_bnode_unlink hfsplus_bnode_unlink
 240 #define hfs_bnode_findhash hfsplus_bnode_findhash
 241 #define hfs_bnode_find hfsplus_bnode_find
 242 #define hfs_bnode_unhash hfsplus_bnode_unhash
 243 #define hfs_bnode_free hfsplus_bnode_free
 244 #define hfs_bnode_create hfsplus_bnode_create
 245 #define hfs_bnode_get hfsplus_bnode_get
 246 #define hfs_bnode_put hfsplus_bnode_put
 247 #define hfs_brec_lenoff hfsplus_brec_lenoff
 248 #define hfs_brec_keylen hfsplus_brec_keylen
 249 #define hfs_brec_insert hfsplus_brec_insert
 250 #define hfs_brec_remove hfsplus_brec_remove
 251 #define hfs_find_init hfsplus_find_init
 252 #define hfs_find_exit hfsplus_find_exit
 253 #define __hfs_brec_find __hplusfs_brec_find
 254 #define hfs_brec_find hfsplus_brec_find
 255 #define hfs_brec_read hfsplus_brec_read
 256 #define hfs_brec_goto hfsplus_brec_goto
 257 #define hfs_part_find hfsplus_part_find
 258
 259 /*
 260  * definitions for ext2 flag ioctls (linux really needs a generic
 261  * interface for this).
 262  */
 263
 264 /* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
 265  * chattr/lsattr */
 266 #define HFSPLUS_IOC_EXT2_GETFLAGS       FS_IOC_GETFLAGS
 267 #define HFSPLUS_IOC_EXT2_SETFLAGS       FS_IOC_SETFLAGS
 268
 269
 270 /*
 271  * Functions in any *.c used in other files
 272  */
 273
 274 /* bitmap.c */
 275 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
 276 int hfsplus_block_free(struct super_block *, u32, u32);
 277
 278 /* btree.c */
 279 struct hfs_btree *hfs_btree_open(struct super_block *, u32);
 280 void hfs_btree_close(struct hfs_btree *);
 281 void hfs_btree_write(struct hfs_btree *);
 282 struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
 283 void hfs_bmap_free(struct hfs_bnode *);
 284
 285 /* bnode.c */
 286 void hfs_bnode_read(struct hfs_bnode *, void *, int, int);
 287 u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
 288 u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
 289 void hfs_bnode_read_key(struct hfs_bnode *, void *, int);
 290 void hfs_bnode_write(struct hfs_bnode *, void *, int, int);
 291 void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
 292 void hfs_bnode_clear(struct hfs_bnode *, int, int);
 293 void hfs_bnode_copy(struct hfs_bnode *, int,
 294                     struct hfs_bnode *, int, int);
 295 void hfs_bnode_move(struct hfs_bnode *, int, int, int);
 296 void hfs_bnode_dump(struct hfs_bnode *);
 297 void hfs_bnode_unlink(struct hfs_bnode *);
 298 struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32);
 299 struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32);
 300 void hfs_bnode_unhash(struct hfs_bnode *);
 301 void hfs_bnode_free(struct hfs_bnode *);
 302 struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32);
 303 void hfs_bnode_get(struct hfs_bnode *);
 304 void hfs_bnode_put(struct hfs_bnode *);
 305
 306 /* brec.c */
 307 u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *);
 308 u16 hfs_brec_keylen(struct hfs_bnode *, u16);
 309 int hfs_brec_insert(struct hfs_find_data *, void *, int);
 310 int hfs_brec_remove(struct hfs_find_data *);
 311
 312 /* bfind.c */
 313 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
 314 void hfs_find_exit(struct hfs_find_data *);
 315 int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *);
 316 int hfs_brec_find(struct hfs_find_data *);
 317 int hfs_brec_read(struct hfs_find_data *, void *, int);
 318 int hfs_brec_goto(struct hfs_find_data *, int);
 319
 320 /* catalog.c */
 321 int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
 322 int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
 323 void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *, u32, struct qstr *);
 324 int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *);
 325 int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
 326 int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
 327 int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
 328                        struct inode *, struct qstr *);
 329 void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms);
 330
 331 /* dir.c */
 332 extern const struct inode_operations hfsplus_dir_inode_operations;
 333 extern const struct file_operations hfsplus_dir_operations;
 334
 335 /* extents.c */
 336 int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
 337 void hfsplus_ext_write_extent(struct inode *);
 338 int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
 339 int hfsplus_free_fork(struct super_block *, u32, struct hfsplus_fork_raw *, int);
 340 int hfsplus_file_extend(struct inode *);
 341 void hfsplus_file_truncate(struct inode *);
 342
 343 /* inode.c */
 344 extern const struct address_space_operations hfsplus_aops;
 345 extern const struct address_space_operations hfsplus_btree_aops;
 346 extern const struct dentry_operations hfsplus_dentry_operations;
 347
 348 void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
 349 void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
 350 int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
 351 int hfsplus_cat_write_inode(struct inode *);
 352 struct inode *hfsplus_new_inode(struct super_block *, int);
 353 void hfsplus_delete_inode(struct inode *);
 354
 355 /* ioctl.c */
 356 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
 357 int hfsplus_setxattr(struct dentry *dentry, const char *name,
 358                      const void *value, size_t size, int flags);
 359 ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
 360                          void *value, size_t size);
 361 ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
 362
 363 /* options.c */
 364 int hfsplus_parse_options(char *, struct hfsplus_sb_info *);
 365 void hfsplus_fill_defaults(struct hfsplus_sb_info *);
 366 int hfsplus_show_options(struct seq_file *, struct vfsmount *);
 367
 368 /* super.c */
 369 struct inode *hfsplus_iget(struct super_block *, unsigned long);
 370 int hfsplus_sync_fs(struct super_block *sb, int wait);
 371
 372 /* tables.c */
 373 extern u16 hfsplus_case_fold_table[];
 374 extern u16 hfsplus_decompose_table[];
 375 extern u16 hfsplus_compose_table[];
 376
 377 /* unicode.c */
 378 int hfsplus_strcasecmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
 379 int hfsplus_strcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *);
 380 int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *);
 381 int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int);
 382 int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str);
 383 int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2);
 384
 385 /* wrapper.c */
 386 int hfsplus_read_wrapper(struct super_block *);
 387
 388 int hfs_part_find(struct super_block *, sector_t *, sector_t *);
 389
 390 /* access macros */
 391 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
 392 {
 393         return sb->s_fs_info;
 394 }
 395
 396 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
 397 {
 398         return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
 399 }
 400
 401 #define sb_bread512(sb, sec, data) ({                   \
 402         struct buffer_head *__bh;                       \
 403         sector_t __block;                               \
 404         loff_t __start;                                 \
 405         int __offset;                                   \
 406                                                         \
 407         __start = (loff_t)(sec) << HFSPLUS_SECTOR_SHIFT;\
 408         __block = __start >> (sb)->s_blocksize_bits;    \
 409         __offset = __start & ((sb)->s_blocksize - 1);   \
 410         __bh = sb_bread((sb), __block);                 \
 411         if (likely(__bh != NULL))                       \
 412                 data = (void *)(__bh->b_data + __offset);\
 413         else                                            \
 414                 data = NULL;                            \
 415         __bh;                                           \
 416 })
 417
 418 /* time macros */
 419 #define __hfsp_mt2ut(t)         (be32_to_cpu(t) - 2082844800U)
 420 #define __hfsp_ut2mt(t)         (cpu_to_be32(t + 2082844800U))
 421
 422 /* compatibility */
 423 #define hfsp_mt2ut(t)           (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
 424 #define hfsp_ut2mt(t)           __hfsp_ut2mt((t).tv_sec)
 425 #define hfsp_now2mt()           __hfsp_ut2mt(get_seconds())
 426
 427 #endif