hfs_fs.h 8.5 KB

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  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. #ifndef _LINUX_HFS_FS_H
  9. #define _LINUX_HFS_FS_H
  10. #include <linux/slab.h>
  11. #include <linux/types.h>
  12. #include <linux/buffer_head.h>
  13. #include <linux/fs.h>
  14. #include <asm/byteorder.h>
  15. #include <asm/uaccess.h>
  16. #include "hfs.h"
  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. //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
  25. //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
  26. //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
  27. #define DBG_MASK (0)
  28. #define dprint(flg, fmt, args...) \
  29. if (flg & DBG_MASK) printk(fmt , ## args)
  30. /*
  31. * struct hfs_inode_info
  32. *
  33. * The HFS-specific part of a Linux (struct inode)
  34. */
  35. struct hfs_inode_info {
  36. atomic_t opencnt;
  37. unsigned int flags;
  38. /* to deal with localtime ugliness */
  39. int tz_secondswest;
  40. struct hfs_cat_key cat_key;
  41. struct list_head open_dir_list;
  42. struct inode *rsrc_inode;
  43. struct semaphore extents_lock;
  44. u16 alloc_blocks, clump_blocks;
  45. sector_t fs_blocks;
  46. /* Allocation extents from catlog record or volume header */
  47. hfs_extent_rec first_extents;
  48. u16 first_blocks;
  49. hfs_extent_rec cached_extents;
  50. u16 cached_start, cached_blocks;
  51. loff_t phys_size;
  52. struct inode vfs_inode;
  53. };
  54. #define HFS_FLG_RSRC 0x0001
  55. #define HFS_FLG_EXT_DIRTY 0x0002
  56. #define HFS_FLG_EXT_NEW 0x0004
  57. #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC)
  58. /*
  59. * struct hfs_sb_info
  60. *
  61. * The HFS-specific part of a Linux (struct super_block)
  62. */
  63. struct hfs_sb_info {
  64. struct buffer_head *mdb_bh; /* The hfs_buffer
  65. holding the real
  66. superblock (aka VIB
  67. or MDB) */
  68. struct hfs_mdb *mdb;
  69. struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding
  70. the alternate superblock */
  71. struct hfs_mdb *alt_mdb;
  72. __be32 *bitmap; /* The page holding the
  73. allocation bitmap */
  74. struct hfs_btree *ext_tree; /* Information about
  75. the extents b-tree */
  76. struct hfs_btree *cat_tree; /* Information about
  77. the catalog b-tree */
  78. u32 file_count; /* The number of
  79. regular files in
  80. the filesystem */
  81. u32 folder_count; /* The number of
  82. directories in the
  83. filesystem */
  84. u32 next_id; /* The next available
  85. file id number */
  86. u32 clumpablks; /* The number of allocation
  87. blocks to try to add when
  88. extending a file */
  89. u32 fs_start; /* The first 512-byte
  90. block represented
  91. in the bitmap */
  92. u32 part_start;
  93. u16 root_files; /* The number of
  94. regular
  95. (non-directory)
  96. files in the root
  97. directory */
  98. u16 root_dirs; /* The number of
  99. directories in the
  100. root directory */
  101. u16 fs_ablocks; /* The number of
  102. allocation blocks
  103. in the filesystem */
  104. u16 free_ablocks; /* the number of unused
  105. allocation blocks
  106. in the filesystem */
  107. u32 alloc_blksz; /* The size of an
  108. "allocation block" */
  109. int s_quiet; /* Silent failure when
  110. changing owner or mode? */
  111. __be32 s_type; /* Type for new files */
  112. __be32 s_creator; /* Creator for new files */
  113. umode_t s_file_umask; /* The umask applied to the
  114. permissions on all files */
  115. umode_t s_dir_umask; /* The umask applied to the
  116. permissions on all dirs */
  117. uid_t s_uid; /* The uid of all files */
  118. gid_t s_gid; /* The gid of all files */
  119. int session, part;
  120. struct nls_table *nls_io, *nls_disk;
  121. struct semaphore bitmap_lock;
  122. unsigned long flags;
  123. u16 blockoffset;
  124. int fs_div;
  125. struct hlist_head rsrc_inodes;
  126. };
  127. #define HFS_FLG_BITMAP_DIRTY 0
  128. #define HFS_FLG_MDB_DIRTY 1
  129. #define HFS_FLG_ALT_MDB_DIRTY 2
  130. /* bitmap.c */
  131. extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
  132. extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);
  133. /* catalog.c */
  134. extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
  135. struct hfs_find_data;
  136. extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
  137. extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *);
  138. extern int hfs_cat_delete(u32, struct inode *, struct qstr *);
  139. extern int hfs_cat_move(u32, struct inode *, struct qstr *,
  140. struct inode *, struct qstr *);
  141. extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *);
  142. /* dir.c */
  143. extern const struct file_operations hfs_dir_operations;
  144. extern const struct inode_operations hfs_dir_inode_operations;
  145. /* extent.c */
  146. extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
  147. extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
  148. extern void hfs_ext_write_extent(struct inode *);
  149. extern int hfs_extend_file(struct inode *);
  150. extern void hfs_file_truncate(struct inode *);
  151. extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
  152. /* inode.c */
  153. extern const struct address_space_operations hfs_aops;
  154. extern const struct address_space_operations hfs_btree_aops;
  155. extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int);
  156. extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
  157. extern int hfs_write_inode(struct inode *, int);
  158. extern int hfs_inode_setattr(struct dentry *, struct iattr *);
  159. extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
  160. __be32 log_size, __be32 phys_size, u32 clump_size);
  161. extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
  162. extern void hfs_clear_inode(struct inode *);
  163. extern void hfs_delete_inode(struct inode *);
  164. /* attr.c */
  165. extern int hfs_setxattr(struct dentry *dentry, const char *name,
  166. const void *value, size_t size, int flags);
  167. extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
  168. void *value, size_t size);
  169. extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
  170. /* mdb.c */
  171. extern int hfs_mdb_get(struct super_block *);
  172. extern void hfs_mdb_commit(struct super_block *);
  173. extern void hfs_mdb_close(struct super_block *);
  174. extern void hfs_mdb_put(struct super_block *);
  175. /* part_tbl.c */
  176. extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
  177. /* string.c */
  178. extern struct dentry_operations hfs_dentry_operations;
  179. extern int hfs_hash_dentry(struct dentry *, struct qstr *);
  180. extern int hfs_strcmp(const unsigned char *, unsigned int,
  181. const unsigned char *, unsigned int);
  182. extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *);
  183. /* trans.c */
  184. extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *);
  185. extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);
  186. extern struct timezone sys_tz;
  187. /*
  188. * There are two time systems. Both are based on seconds since
  189. * a particular time/date.
  190. * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970
  191. * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904
  192. *
  193. */
  194. #define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60)
  195. #define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60)
  196. #define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode))
  197. #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info)
  198. #define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) }
  199. #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec)
  200. #define hfs_mtime() __hfs_u_to_mtime(get_seconds())
  201. static inline const char *hfs_mdb_name(struct super_block *sb)
  202. {
  203. return sb->s_id;
  204. }
  205. static inline void hfs_bitmap_dirty(struct super_block *sb)
  206. {
  207. set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
  208. sb->s_dirt = 1;
  209. }
  210. static inline void hfs_buffer_sync(struct buffer_head *bh)
  211. {
  212. while (buffer_locked(bh)) {
  213. wait_on_buffer(bh);
  214. }
  215. if (buffer_dirty(bh)) {
  216. ll_rw_block(WRITE, 1, &bh);
  217. wait_on_buffer(bh);
  218. }
  219. }
  220. #define sb_bread512(sb, sec, data) ({ \
  221. struct buffer_head *__bh; \
  222. sector_t __block; \
  223. loff_t __start; \
  224. int __offset; \
  225. \
  226. __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
  227. __block = __start >> (sb)->s_blocksize_bits; \
  228. __offset = __start & ((sb)->s_blocksize - 1); \
  229. __bh = sb_bread((sb), __block); \
  230. if (likely(__bh != NULL)) \
  231. data = (void *)(__bh->b_data + __offset);\
  232. else \
  233. data = NULL; \
  234. __bh; \
  235. })
  236. #endif