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