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/slab.h> 13 #include <linux/types.h> 14 #include <linux/buffer_head.h> 15 #include <linux/fs.h> 16 17 #include <asm/byteorder.h> 18 #include <asm/uaccess.h> 19 20 #include "hfs.h" 21 22 #define DBG_BNODE_REFS 0x00000001 23 #define DBG_BNODE_MOD 0x00000002 24 #define DBG_CAT_MOD 0x00000004 25 #define DBG_INODE 0x00000008 26 #define DBG_SUPER 0x00000010 27 #define DBG_EXTENT 0x00000020 28 #define DBG_BITMAP 0x00000040 29 30 //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP) 31 //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) 32 //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) 33 #define DBG_MASK (0) 34 35 #define dprint(flg, fmt, args...) \ 36 if (flg & DBG_MASK) printk(fmt , ## args) 37 38 /* 39 * struct hfs_inode_info 40 * 41 * The HFS-specific part of a Linux (struct inode) 42 */ 43 struct hfs_inode_info { 44 atomic_t opencnt; 45 46 unsigned int flags; 47 48 /* to deal with localtime ugliness */ 49 int tz_secondswest; 50 51 struct hfs_cat_key cat_key; 52 53 struct list_head open_dir_list; 54 struct inode *rsrc_inode; 55 56 struct semaphore extents_lock; 57 58 u16 alloc_blocks, clump_blocks; 59 sector_t fs_blocks; 60 /* Allocation extents from catlog record or volume header */ 61 hfs_extent_rec first_extents; 62 u16 first_blocks; 63 hfs_extent_rec cached_extents; 64 u16 cached_start, cached_blocks; 65 66 loff_t phys_size; 67 struct inode vfs_inode; 68 }; 69 70 #define HFS_FLG_RSRC 0x0001 71 #define HFS_FLG_EXT_DIRTY 0x0002 72 #define HFS_FLG_EXT_NEW 0x0004 73 74 #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC) 75 76 /* 77 * struct hfs_sb_info 78 * 79 * The HFS-specific part of a Linux (struct super_block) 80 */ 81 struct hfs_sb_info { 82 struct buffer_head *mdb_bh; /* The hfs_buffer 83 holding the real 84 superblock (aka VIB 85 or MDB) */ 86 struct hfs_mdb *mdb; 87 struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding 88 the alternate superblock */ 89 struct hfs_mdb *alt_mdb; 90 __be32 *bitmap; /* The page holding the 91 allocation bitmap */ 92 struct hfs_btree *ext_tree; /* Information about 93 the extents b-tree */ 94 struct hfs_btree *cat_tree; /* Information about 95 the catalog b-tree */ 96 u32 file_count; /* The number of 97 regular files in 98 the filesystem */ 99 u32 folder_count; /* The number of 100 directories in the 101 filesystem */ 102 u32 next_id; /* The next available 103 file id number */ 104 u32 clumpablks; /* The number of allocation 105 blocks to try to add when 106 extending a file */ 107 u32 fs_start; /* The first 512-byte 108 block represented 109 in the bitmap */ 110 u32 part_start; 111 u16 root_files; /* The number of 112 regular 113 (non-directory) 114 files in the root 115 directory */ 116 u16 root_dirs; /* The number of 117 directories in the 118 root directory */ 119 u16 fs_ablocks; /* The number of 120 allocation blocks 121 in the filesystem */ 122 u16 free_ablocks; /* the number of unused 123 allocation blocks 124 in the filesystem */ 125 u32 alloc_blksz; /* The size of an 126 "allocation block" */ 127 int s_quiet; /* Silent failure when 128 changing owner or mode? */ 129 __be32 s_type; /* Type for new files */ 130 __be32 s_creator; /* Creator for new files */ 131 umode_t s_file_umask; /* The umask applied to the 132 permissions on all files */ 133 umode_t s_dir_umask; /* The umask applied to the 134 permissions on all dirs */ 135 uid_t s_uid; /* The uid of all files */ 136 gid_t s_gid; /* The gid of all files */ 137 138 int session, part; 139 140 struct nls_table *nls_io, *nls_disk; 141 142 struct semaphore bitmap_lock; 143 144 unsigned long flags; 145 146 u16 blockoffset; 147 148 int fs_div; 149 150 struct hlist_head rsrc_inodes; 151 }; 152 153 #define HFS_FLG_BITMAP_DIRTY 0 154 #define HFS_FLG_MDB_DIRTY 1 155 #define HFS_FLG_ALT_MDB_DIRTY 2 156 157 /* bitmap.c */ 158 extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *); 159 extern int hfs_clear_vbm_bits(struct super_block *, u16, u16); 160 161 /* catalog.c */ 162 extern int hfs_cat_keycmp(const btree_key *, const btree_key *); 163 struct hfs_find_data; 164 extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *); 165 extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *); 166 extern int hfs_cat_delete(u32, struct inode *, struct qstr *); 167 extern int hfs_cat_move(u32, struct inode *, struct qstr *, 168 struct inode *, struct qstr *); 169 extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *); 170 171 /* dir.c */ 172 extern const struct file_operations hfs_dir_operations; 173 extern const struct inode_operations hfs_dir_inode_operations; 174 175 /* extent.c */ 176 extern int hfs_ext_keycmp(const btree_key *, const btree_key *); 177 extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int); 178 extern void hfs_ext_write_extent(struct inode *); 179 extern int hfs_extend_file(struct inode *); 180 extern void hfs_file_truncate(struct inode *); 181 182 extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int); 183 184 /* inode.c */ 185 extern const struct address_space_operations hfs_aops; 186 extern const struct address_space_operations hfs_btree_aops; 187 188 extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int); 189 extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *); 190 extern int hfs_write_inode(struct inode *, int); 191 extern int hfs_inode_setattr(struct dentry *, struct iattr *); 192 extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, 193 __be32 log_size, __be32 phys_size, u32 clump_size); 194 extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *); 195 extern void hfs_clear_inode(struct inode *); 196 extern void hfs_delete_inode(struct inode *); 197 198 /* attr.c */ 199 extern int hfs_setxattr(struct dentry *dentry, const char *name, 200 const void *value, size_t size, int flags); 201 extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name, 202 void *value, size_t size); 203 extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 204 205 /* mdb.c */ 206 extern int hfs_mdb_get(struct super_block *); 207 extern void hfs_mdb_commit(struct super_block *); 208 extern void hfs_mdb_close(struct super_block *); 209 extern void hfs_mdb_put(struct super_block *); 210 211 /* part_tbl.c */ 212 extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); 213 214 /* string.c */ 215 extern struct dentry_operations hfs_dentry_operations; 216 217 extern int hfs_hash_dentry(struct dentry *, struct qstr *); 218 extern int hfs_strcmp(const unsigned char *, unsigned int, 219 const unsigned char *, unsigned int); 220 extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *); 221 222 /* trans.c */ 223 extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *); 224 extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *); 225 226 extern struct timezone sys_tz; 227 228 /* 229 * There are two time systems. Both are based on seconds since 230 * a particular time/date. 231 * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970 232 * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904 233 * 234 */ 235 #define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60) 236 #define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60) 237 238 #define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode)) 239 #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info) 240 241 #define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) } 242 #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec) 243 #define hfs_mtime() __hfs_u_to_mtime(get_seconds()) 244 245 static inline const char *hfs_mdb_name(struct super_block *sb) 246 { 247 return sb->s_id; 248 } 249 250 static inline void hfs_bitmap_dirty(struct super_block *sb) 251 { 252 set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags); 253 sb->s_dirt = 1; 254 } 255 256 static inline void hfs_buffer_sync(struct buffer_head *bh) 257 { 258 while (buffer_locked(bh)) { 259 wait_on_buffer(bh); 260 } 261 if (buffer_dirty(bh)) { 262 ll_rw_block(WRITE, 1, &bh); 263 wait_on_buffer(bh); 264 } 265 } 266 267 #define sb_bread512(sb, sec, data) ({ \ 268 struct buffer_head *__bh; \ 269 sector_t __block; \ 270 loff_t __start; \ 271 int __offset; \ 272 \ 273 __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\ 274 __block = __start >> (sb)->s_blocksize_bits; \ 275 __offset = __start & ((sb)->s_blocksize - 1); \ 276 __bh = sb_bread((sb), __block); \ 277 if (likely(__bh != NULL)) \ 278 data = (void *)(__bh->b_data + __offset);\ 279 else \ 280 data = NULL; \ 281 __bh; \ 282 }) 283 284 #endif 285