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/mutex.h> 15 #include <linux/buffer_head.h> 16 #include <linux/fs.h> 17 18 #include <asm/byteorder.h> 19 #include <asm/uaccess.h> 20 21 #include "hfs.h" 22 23 #define DBG_BNODE_REFS 0x00000001 24 #define DBG_BNODE_MOD 0x00000002 25 #define DBG_CAT_MOD 0x00000004 26 #define DBG_INODE 0x00000008 27 #define DBG_SUPER 0x00000010 28 #define DBG_EXTENT 0x00000020 29 #define DBG_BITMAP 0x00000040 30 31 //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP) 32 //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE) 33 //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT) 34 #define DBG_MASK (0) 35 36 #define dprint(flg, fmt, args...) \ 37 if (flg & DBG_MASK) printk(fmt , ## args) 38 39 /* 40 * struct hfs_inode_info 41 * 42 * The HFS-specific part of a Linux (struct inode) 43 */ 44 struct hfs_inode_info { 45 atomic_t opencnt; 46 47 unsigned int flags; 48 49 /* to deal with localtime ugliness */ 50 int tz_secondswest; 51 52 struct hfs_cat_key cat_key; 53 54 struct list_head open_dir_list; 55 struct inode *rsrc_inode; 56 57 struct mutex extents_lock; 58 59 u16 alloc_blocks, clump_blocks; 60 sector_t fs_blocks; 61 /* Allocation extents from catlog record or volume header */ 62 hfs_extent_rec first_extents; 63 u16 first_blocks; 64 hfs_extent_rec cached_extents; 65 u16 cached_start, cached_blocks; 66 67 loff_t phys_size; 68 struct inode vfs_inode; 69 }; 70 71 #define HFS_FLG_RSRC 0x0001 72 #define HFS_FLG_EXT_DIRTY 0x0002 73 #define HFS_FLG_EXT_NEW 0x0004 74 75 #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC) 76 77 /* 78 * struct hfs_sb_info 79 * 80 * The HFS-specific part of a Linux (struct super_block) 81 */ 82 struct hfs_sb_info { 83 struct buffer_head *mdb_bh; /* The hfs_buffer 84 holding the real 85 superblock (aka VIB 86 or MDB) */ 87 struct hfs_mdb *mdb; 88 struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding 89 the alternate superblock */ 90 struct hfs_mdb *alt_mdb; 91 __be32 *bitmap; /* The page holding the 92 allocation bitmap */ 93 struct hfs_btree *ext_tree; /* Information about 94 the extents b-tree */ 95 struct hfs_btree *cat_tree; /* Information about 96 the catalog b-tree */ 97 u32 file_count; /* The number of 98 regular files in 99 the filesystem */ 100 u32 folder_count; /* The number of 101 directories in the 102 filesystem */ 103 u32 next_id; /* The next available 104 file id number */ 105 u32 clumpablks; /* The number of allocation 106 blocks to try to add when 107 extending a file */ 108 u32 fs_start; /* The first 512-byte 109 block represented 110 in the bitmap */ 111 u32 part_start; 112 u16 root_files; /* The number of 113 regular 114 (non-directory) 115 files in the root 116 directory */ 117 u16 root_dirs; /* The number of 118 directories in the 119 root directory */ 120 u16 fs_ablocks; /* The number of 121 allocation blocks 122 in the filesystem */ 123 u16 free_ablocks; /* the number of unused 124 allocation blocks 125 in the filesystem */ 126 u32 alloc_blksz; /* The size of an 127 "allocation block" */ 128 int s_quiet; /* Silent failure when 129 changing owner or mode? */ 130 __be32 s_type; /* Type for new files */ 131 __be32 s_creator; /* Creator for new files */ 132 umode_t s_file_umask; /* The umask applied to the 133 permissions on all files */ 134 umode_t s_dir_umask; /* The umask applied to the 135 permissions on all dirs */ 136 uid_t s_uid; /* The uid of all files */ 137 gid_t s_gid; /* The gid of all files */ 138 139 int session, part; 140 141 struct nls_table *nls_io, *nls_disk; 142 143 struct mutex bitmap_lock; 144 145 unsigned long flags; 146 147 u16 blockoffset; 148 149 int fs_div; 150 151 struct hlist_head rsrc_inodes; 152 }; 153 154 #define HFS_FLG_BITMAP_DIRTY 0 155 #define HFS_FLG_MDB_DIRTY 1 156 #define HFS_FLG_ALT_MDB_DIRTY 2 157 158 /* bitmap.c */ 159 extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *); 160 extern int hfs_clear_vbm_bits(struct super_block *, u16, u16); 161 162 /* catalog.c */ 163 extern int hfs_cat_keycmp(const btree_key *, const btree_key *); 164 struct hfs_find_data; 165 extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *); 166 extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *); 167 extern int hfs_cat_delete(u32, struct inode *, struct qstr *); 168 extern int hfs_cat_move(u32, struct inode *, struct qstr *, 169 struct inode *, struct qstr *); 170 extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *); 171 172 /* dir.c */ 173 extern const struct file_operations hfs_dir_operations; 174 extern const struct inode_operations hfs_dir_inode_operations; 175 176 /* extent.c */ 177 extern int hfs_ext_keycmp(const btree_key *, const btree_key *); 178 extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int); 179 extern void hfs_ext_write_extent(struct inode *); 180 extern int hfs_extend_file(struct inode *); 181 extern void hfs_file_truncate(struct inode *); 182 183 extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int); 184 185 /* inode.c */ 186 extern const struct address_space_operations hfs_aops; 187 extern const struct address_space_operations hfs_btree_aops; 188 189 extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int); 190 extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *); 191 extern int hfs_write_inode(struct inode *, int); 192 extern int hfs_inode_setattr(struct dentry *, struct iattr *); 193 extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext, 194 __be32 log_size, __be32 phys_size, u32 clump_size); 195 extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *); 196 extern void hfs_clear_inode(struct inode *); 197 extern void hfs_delete_inode(struct inode *); 198 199 /* attr.c */ 200 extern int hfs_setxattr(struct dentry *dentry, const char *name, 201 const void *value, size_t size, int flags); 202 extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name, 203 void *value, size_t size); 204 extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size); 205 206 /* mdb.c */ 207 extern int hfs_mdb_get(struct super_block *); 208 extern void hfs_mdb_commit(struct super_block *); 209 extern void hfs_mdb_close(struct super_block *); 210 extern void hfs_mdb_put(struct super_block *); 211 212 /* part_tbl.c */ 213 extern int hfs_part_find(struct super_block *, sector_t *, sector_t *); 214 215 /* string.c */ 216 extern const struct dentry_operations hfs_dentry_operations; 217 218 extern int hfs_hash_dentry(struct dentry *, struct qstr *); 219 extern int hfs_strcmp(const unsigned char *, unsigned int, 220 const unsigned char *, unsigned int); 221 extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *); 222 223 /* trans.c */ 224 extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *); 225 extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *); 226 227 extern struct timezone sys_tz; 228 229 /* 230 * There are two time systems. Both are based on seconds since 231 * a particular time/date. 232 * Unix: unsigned lil-endian since 00:00 GMT, Jan. 1, 1970 233 * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904 234 * 235 */ 236 #define __hfs_u_to_mtime(sec) cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60) 237 #define __hfs_m_to_utime(sec) (be32_to_cpu(sec) - 2082844800U + sys_tz.tz_minuteswest * 60) 238 239 #define HFS_I(inode) (list_entry(inode, struct hfs_inode_info, vfs_inode)) 240 #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info) 241 242 #define hfs_m_to_utime(time) (struct timespec){ .tv_sec = __hfs_m_to_utime(time) } 243 #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec) 244 #define hfs_mtime() __hfs_u_to_mtime(get_seconds()) 245 246 static inline const char *hfs_mdb_name(struct super_block *sb) 247 { 248 return sb->s_id; 249 } 250 251 static inline void hfs_bitmap_dirty(struct super_block *sb) 252 { 253 set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags); 254 sb->s_dirt = 1; 255 } 256 257 static inline void hfs_buffer_sync(struct buffer_head *bh) 258 { 259 while (buffer_locked(bh)) { 260 wait_on_buffer(bh); 261 } 262 if (buffer_dirty(bh)) { 263 ll_rw_block(WRITE, 1, &bh); 264 wait_on_buffer(bh); 265 } 266 } 267 268 #define sb_bread512(sb, sec, data) ({ \ 269 struct buffer_head *__bh; \ 270 sector_t __block; \ 271 loff_t __start; \ 272 int __offset; \ 273 \ 274 __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\ 275 __block = __start >> (sb)->s_blocksize_bits; \ 276 __offset = __start & ((sb)->s_blocksize - 1); \ 277 __bh = sb_bread((sb), __block); \ 278 if (likely(__bh != NULL)) \ 279 data = (void *)(__bh->b_data + __offset);\ 280 else \ 281 data = NULL; \ 282 __bh; \ 283 }) 284 285 #endif 286