11da177e4SLinus Torvalds /*
21da177e4SLinus Torvalds * linux/fs/hfs/hfs_fs.h
31da177e4SLinus Torvalds *
41da177e4SLinus Torvalds * Copyright (C) 1995-1997 Paul H. Hargrove
51da177e4SLinus Torvalds * (C) 2003 Ardis Technologies <roman@ardistech.com>
61da177e4SLinus Torvalds * This file may be distributed under the terms of the GNU General Public License.
71da177e4SLinus Torvalds */
81da177e4SLinus Torvalds
91da177e4SLinus Torvalds #ifndef _LINUX_HFS_FS_H
101da177e4SLinus Torvalds #define _LINUX_HFS_FS_H
111da177e4SLinus Torvalds
12d6142673SJoe Perches #ifdef pr_fmt
13d6142673SJoe Perches #undef pr_fmt
14d6142673SJoe Perches #endif
15d6142673SJoe Perches
16d6142673SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
17d6142673SJoe Perches
181da177e4SLinus Torvalds #include <linux/slab.h>
191da177e4SLinus Torvalds #include <linux/types.h>
203084b72dSMatthias Kaehlcke #include <linux/mutex.h>
211da177e4SLinus Torvalds #include <linux/buffer_head.h>
221da177e4SLinus Torvalds #include <linux/fs.h>
235687b578SArtem Bityutskiy #include <linux/workqueue.h>
241da177e4SLinus Torvalds
251da177e4SLinus Torvalds #include <asm/byteorder.h>
267c0f6ba6SLinus Torvalds #include <linux/uaccess.h>
271da177e4SLinus Torvalds
281da177e4SLinus Torvalds #include "hfs.h"
291da177e4SLinus Torvalds
301da177e4SLinus Torvalds #define DBG_BNODE_REFS 0x00000001
311da177e4SLinus Torvalds #define DBG_BNODE_MOD 0x00000002
321da177e4SLinus Torvalds #define DBG_CAT_MOD 0x00000004
331da177e4SLinus Torvalds #define DBG_INODE 0x00000008
341da177e4SLinus Torvalds #define DBG_SUPER 0x00000010
351da177e4SLinus Torvalds #define DBG_EXTENT 0x00000020
361da177e4SLinus Torvalds #define DBG_BITMAP 0x00000040
371da177e4SLinus Torvalds
381da177e4SLinus Torvalds //#define DBG_MASK (DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
391da177e4SLinus Torvalds //#define DBG_MASK (DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
401da177e4SLinus Torvalds //#define DBG_MASK (DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
411da177e4SLinus Torvalds #define DBG_MASK (0)
421da177e4SLinus Torvalds
43c2b3e1f7SJoe Perches #define hfs_dbg(flg, fmt, ...) \
44c2b3e1f7SJoe Perches do { \
45c2b3e1f7SJoe Perches if (DBG_##flg & DBG_MASK) \
46d6142673SJoe Perches printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
47c2b3e1f7SJoe Perches } while (0)
48c2b3e1f7SJoe Perches
49c2b3e1f7SJoe Perches #define hfs_dbg_cont(flg, fmt, ...) \
50c2b3e1f7SJoe Perches do { \
51c2b3e1f7SJoe Perches if (DBG_##flg & DBG_MASK) \
52d6142673SJoe Perches pr_cont(fmt, ##__VA_ARGS__); \
53c2b3e1f7SJoe Perches } while (0)
54c2b3e1f7SJoe Perches
551da177e4SLinus Torvalds
561da177e4SLinus Torvalds /*
571da177e4SLinus Torvalds * struct hfs_inode_info
581da177e4SLinus Torvalds *
591da177e4SLinus Torvalds * The HFS-specific part of a Linux (struct inode)
601da177e4SLinus Torvalds */
611da177e4SLinus Torvalds struct hfs_inode_info {
621da177e4SLinus Torvalds atomic_t opencnt;
631da177e4SLinus Torvalds
641da177e4SLinus Torvalds unsigned int flags;
651da177e4SLinus Torvalds
661da177e4SLinus Torvalds /* to deal with localtime ugliness */
671da177e4SLinus Torvalds int tz_secondswest;
681da177e4SLinus Torvalds
691da177e4SLinus Torvalds struct hfs_cat_key cat_key;
701da177e4SLinus Torvalds
711da177e4SLinus Torvalds struct list_head open_dir_list;
729717a91bSAl Viro spinlock_t open_dir_lock;
731da177e4SLinus Torvalds struct inode *rsrc_inode;
741da177e4SLinus Torvalds
7539f8d472SMatthias Kaehlcke struct mutex extents_lock;
761da177e4SLinus Torvalds
771da177e4SLinus Torvalds u16 alloc_blocks, clump_blocks;
781da177e4SLinus Torvalds sector_t fs_blocks;
791da177e4SLinus Torvalds /* Allocation extents from catlog record or volume header */
801da177e4SLinus Torvalds hfs_extent_rec first_extents;
811da177e4SLinus Torvalds u16 first_blocks;
821da177e4SLinus Torvalds hfs_extent_rec cached_extents;
831da177e4SLinus Torvalds u16 cached_start, cached_blocks;
841da177e4SLinus Torvalds
851da177e4SLinus Torvalds loff_t phys_size;
861da177e4SLinus Torvalds struct inode vfs_inode;
871da177e4SLinus Torvalds };
881da177e4SLinus Torvalds
891da177e4SLinus Torvalds #define HFS_FLG_RSRC 0x0001
901da177e4SLinus Torvalds #define HFS_FLG_EXT_DIRTY 0x0002
911da177e4SLinus Torvalds #define HFS_FLG_EXT_NEW 0x0004
921da177e4SLinus Torvalds
931da177e4SLinus Torvalds #define HFS_IS_RSRC(inode) (HFS_I(inode)->flags & HFS_FLG_RSRC)
941da177e4SLinus Torvalds
951da177e4SLinus Torvalds /*
961da177e4SLinus Torvalds * struct hfs_sb_info
971da177e4SLinus Torvalds *
981da177e4SLinus Torvalds * The HFS-specific part of a Linux (struct super_block)
991da177e4SLinus Torvalds */
1001da177e4SLinus Torvalds struct hfs_sb_info {
1011da177e4SLinus Torvalds struct buffer_head *mdb_bh; /* The hfs_buffer
1021da177e4SLinus Torvalds holding the real
1031da177e4SLinus Torvalds superblock (aka VIB
1041da177e4SLinus Torvalds or MDB) */
1051da177e4SLinus Torvalds struct hfs_mdb *mdb;
1061da177e4SLinus Torvalds struct buffer_head *alt_mdb_bh; /* The hfs_buffer holding
1071da177e4SLinus Torvalds the alternate superblock */
1081da177e4SLinus Torvalds struct hfs_mdb *alt_mdb;
1091da177e4SLinus Torvalds __be32 *bitmap; /* The page holding the
1101da177e4SLinus Torvalds allocation bitmap */
1111da177e4SLinus Torvalds struct hfs_btree *ext_tree; /* Information about
1121da177e4SLinus Torvalds the extents b-tree */
1131da177e4SLinus Torvalds struct hfs_btree *cat_tree; /* Information about
1141da177e4SLinus Torvalds the catalog b-tree */
1151da177e4SLinus Torvalds u32 file_count; /* The number of
1161da177e4SLinus Torvalds regular files in
1171da177e4SLinus Torvalds the filesystem */
1181da177e4SLinus Torvalds u32 folder_count; /* The number of
1191da177e4SLinus Torvalds directories in the
1201da177e4SLinus Torvalds filesystem */
1211da177e4SLinus Torvalds u32 next_id; /* The next available
1221da177e4SLinus Torvalds file id number */
1231da177e4SLinus Torvalds u32 clumpablks; /* The number of allocation
1241da177e4SLinus Torvalds blocks to try to add when
1251da177e4SLinus Torvalds extending a file */
1261da177e4SLinus Torvalds u32 fs_start; /* The first 512-byte
1271da177e4SLinus Torvalds block represented
1281da177e4SLinus Torvalds in the bitmap */
1291da177e4SLinus Torvalds u32 part_start;
1301da177e4SLinus Torvalds u16 root_files; /* The number of
1311da177e4SLinus Torvalds regular
1321da177e4SLinus Torvalds (non-directory)
1331da177e4SLinus Torvalds files in the root
1341da177e4SLinus Torvalds directory */
1351da177e4SLinus Torvalds u16 root_dirs; /* The number of
1361da177e4SLinus Torvalds directories in the
1371da177e4SLinus Torvalds root directory */
1381da177e4SLinus Torvalds u16 fs_ablocks; /* The number of
1391da177e4SLinus Torvalds allocation blocks
1401da177e4SLinus Torvalds in the filesystem */
1411da177e4SLinus Torvalds u16 free_ablocks; /* the number of unused
1421da177e4SLinus Torvalds allocation blocks
1431da177e4SLinus Torvalds in the filesystem */
1441da177e4SLinus Torvalds u32 alloc_blksz; /* The size of an
1451da177e4SLinus Torvalds "allocation block" */
1461da177e4SLinus Torvalds int s_quiet; /* Silent failure when
1471da177e4SLinus Torvalds changing owner or mode? */
1481da177e4SLinus Torvalds __be32 s_type; /* Type for new files */
1491da177e4SLinus Torvalds __be32 s_creator; /* Creator for new files */
1501da177e4SLinus Torvalds umode_t s_file_umask; /* The umask applied to the
1511da177e4SLinus Torvalds permissions on all files */
1521da177e4SLinus Torvalds umode_t s_dir_umask; /* The umask applied to the
1531da177e4SLinus Torvalds permissions on all dirs */
15443b5e4ccSEric W. Biederman kuid_t s_uid; /* The uid of all files */
15543b5e4ccSEric W. Biederman kgid_t s_gid; /* The gid of all files */
1561da177e4SLinus Torvalds
1571da177e4SLinus Torvalds int session, part;
158328b9227SRoman Zippel struct nls_table *nls_io, *nls_disk;
1593084b72dSMatthias Kaehlcke struct mutex bitmap_lock;
1601da177e4SLinus Torvalds unsigned long flags;
1611da177e4SLinus Torvalds u16 blockoffset;
1621da177e4SLinus Torvalds int fs_div;
163b16ca626SArtem Bityutskiy struct super_block *sb;
1645687b578SArtem Bityutskiy int work_queued; /* non-zero delayed work is queued */
1655687b578SArtem Bityutskiy struct delayed_work mdb_work; /* MDB flush delayed work */
1665687b578SArtem Bityutskiy spinlock_t work_lock; /* protects mdb_work and work_queued */
1671da177e4SLinus Torvalds };
1681da177e4SLinus Torvalds
1691da177e4SLinus Torvalds #define HFS_FLG_BITMAP_DIRTY 0
1701da177e4SLinus Torvalds #define HFS_FLG_MDB_DIRTY 1
1711da177e4SLinus Torvalds #define HFS_FLG_ALT_MDB_DIRTY 2
1721da177e4SLinus Torvalds
1731da177e4SLinus Torvalds /* bitmap.c */
1741da177e4SLinus Torvalds extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
1751da177e4SLinus Torvalds extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);
1761da177e4SLinus Torvalds
1771da177e4SLinus Torvalds /* catalog.c */
1781da177e4SLinus Torvalds extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
1791da177e4SLinus Torvalds struct hfs_find_data;
1801da177e4SLinus Torvalds extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
18171e93963SAl Viro extern int hfs_cat_create(u32, struct inode *, const struct qstr *, struct inode *);
18271e93963SAl Viro extern int hfs_cat_delete(u32, struct inode *, const struct qstr *);
18371e93963SAl Viro extern int hfs_cat_move(u32, struct inode *, const struct qstr *,
18471e93963SAl Viro struct inode *, const struct qstr *);
18571e93963SAl Viro extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, const struct qstr *);
1861da177e4SLinus Torvalds
1871da177e4SLinus Torvalds /* dir.c */
1884b6f5d20SArjan van de Ven extern const struct file_operations hfs_dir_operations;
18992e1d5beSArjan van de Ven extern const struct inode_operations hfs_dir_inode_operations;
1901da177e4SLinus Torvalds
1911da177e4SLinus Torvalds /* extent.c */
1921da177e4SLinus Torvalds extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
1931da177e4SLinus Torvalds extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
1949509f178SAlexey Khoroshilov extern int hfs_ext_write_extent(struct inode *);
1951da177e4SLinus Torvalds extern int hfs_extend_file(struct inode *);
1961da177e4SLinus Torvalds extern void hfs_file_truncate(struct inode *);
1971da177e4SLinus Torvalds
1981da177e4SLinus Torvalds extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
1991da177e4SLinus Torvalds
2001da177e4SLinus Torvalds /* inode.c */
201f5e54d6eSChristoph Hellwig extern const struct address_space_operations hfs_aops;
202f5e54d6eSChristoph Hellwig extern const struct address_space_operations hfs_btree_aops;
2031da177e4SLinus Torvalds
204cfef1f7bSMatthew Wilcox (Oracle) int hfs_write_begin(struct file *file, struct address_space *mapping,
205cfef1f7bSMatthew Wilcox (Oracle) loff_t pos, unsigned len, struct page **pagep, void **fsdata);
20671e93963SAl Viro extern struct inode *hfs_new_inode(struct inode *, const struct qstr *, umode_t);
2071da177e4SLinus Torvalds extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
208a9185b41SChristoph Hellwig extern int hfs_write_inode(struct inode *, struct writeback_control *);
209*c1632a0fSChristian Brauner extern int hfs_inode_setattr(struct mnt_idmap *, struct dentry *,
210549c7297SChristian Brauner struct iattr *);
2111da177e4SLinus Torvalds extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
2121da177e4SLinus Torvalds __be32 log_size, __be32 phys_size, u32 clump_size);
2131da177e4SLinus Torvalds extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
214b57922d9SAl Viro extern void hfs_evict_inode(struct inode *);
2151da177e4SLinus Torvalds extern void hfs_delete_inode(struct inode *);
2161da177e4SLinus Torvalds
2171da177e4SLinus Torvalds /* attr.c */
218b8020effSAndreas Gruenbacher extern const struct xattr_handler *hfs_xattr_handlers[];
2191da177e4SLinus Torvalds
2201da177e4SLinus Torvalds /* mdb.c */
2211da177e4SLinus Torvalds extern int hfs_mdb_get(struct super_block *);
2221da177e4SLinus Torvalds extern void hfs_mdb_commit(struct super_block *);
2231da177e4SLinus Torvalds extern void hfs_mdb_close(struct super_block *);
2241da177e4SLinus Torvalds extern void hfs_mdb_put(struct super_block *);
2251da177e4SLinus Torvalds
2261da177e4SLinus Torvalds /* part_tbl.c */
2271da177e4SLinus Torvalds extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);
2281da177e4SLinus Torvalds
2291da177e4SLinus Torvalds /* string.c */
230e16404edSAl Viro extern const struct dentry_operations hfs_dentry_operations;
2311da177e4SLinus Torvalds
232da53be12SLinus Torvalds extern int hfs_hash_dentry(const struct dentry *, struct qstr *);
2331da177e4SLinus Torvalds extern int hfs_strcmp(const unsigned char *, unsigned int,
2341da177e4SLinus Torvalds const unsigned char *, unsigned int);
2356fa67e70SAl Viro extern int hfs_compare_dentry(const struct dentry *dentry,
236621e155aSNick Piggin unsigned int len, const char *str, const struct qstr *name);
2371da177e4SLinus Torvalds
2381da177e4SLinus Torvalds /* trans.c */
23971e93963SAl Viro extern void hfs_asc2mac(struct super_block *, struct hfs_name *, const struct qstr *);
240328b9227SRoman Zippel extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);
2411da177e4SLinus Torvalds
2425687b578SArtem Bityutskiy /* super.c */
2435687b578SArtem Bityutskiy extern void hfs_mark_mdb_dirty(struct super_block *sb);
2445687b578SArtem Bityutskiy
2451da177e4SLinus Torvalds /*
2461da177e4SLinus Torvalds * There are two time systems. Both are based on seconds since
2471da177e4SLinus Torvalds * a particular time/date.
2484ddfc3dcSArnd Bergmann * Unix: signed little-endian since 00:00 GMT, Jan. 1, 1970
2491da177e4SLinus Torvalds * mac: unsigned big-endian since 00:00 GMT, Jan. 1, 1904
2501da177e4SLinus Torvalds *
2514ddfc3dcSArnd Bergmann * HFS implementations are highly inconsistent, this one matches the
2524ddfc3dcSArnd Bergmann * traditional behavior of 64-bit Linux, giving the most useful
2534ddfc3dcSArnd Bergmann * time range between 1970 and 2106, by treating any on-disk timestamp
2544ddfc3dcSArnd Bergmann * under HFS_UTC_OFFSET (Jan 1 1970) as a time between 2040 and 2106.
2551da177e4SLinus Torvalds */
2564ddfc3dcSArnd Bergmann #define HFS_UTC_OFFSET 2082844800U
2571da177e4SLinus Torvalds
__hfs_m_to_utime(__be32 mt)2584ddfc3dcSArnd Bergmann static inline time64_t __hfs_m_to_utime(__be32 mt)
2594ddfc3dcSArnd Bergmann {
2604ddfc3dcSArnd Bergmann time64_t ut = (u32)(be32_to_cpu(mt) - HFS_UTC_OFFSET);
2614ddfc3dcSArnd Bergmann
2624ddfc3dcSArnd Bergmann return ut + sys_tz.tz_minuteswest * 60;
2634ddfc3dcSArnd Bergmann }
2644ddfc3dcSArnd Bergmann
__hfs_u_to_mtime(time64_t ut)2654ddfc3dcSArnd Bergmann static inline __be32 __hfs_u_to_mtime(time64_t ut)
2664ddfc3dcSArnd Bergmann {
2674ddfc3dcSArnd Bergmann ut -= sys_tz.tz_minuteswest * 60;
2684ddfc3dcSArnd Bergmann
2694ddfc3dcSArnd Bergmann return cpu_to_be32(lower_32_bits(ut) + HFS_UTC_OFFSET);
2704ddfc3dcSArnd Bergmann }
271db6172c4SRasmus Villemoes #define HFS_I(inode) (container_of(inode, struct hfs_inode_info, vfs_inode))
2721da177e4SLinus Torvalds #define HFS_SB(sb) ((struct hfs_sb_info *)(sb)->s_fs_info)
2731da177e4SLinus Torvalds
2744ddfc3dcSArnd Bergmann #define hfs_m_to_utime(time) (struct timespec64){ .tv_sec = __hfs_m_to_utime(time) }
2751da177e4SLinus Torvalds #define hfs_u_to_mtime(time) __hfs_u_to_mtime((time).tv_sec)
2764ddfc3dcSArnd Bergmann #define hfs_mtime() __hfs_u_to_mtime(ktime_get_real_seconds())
2771da177e4SLinus Torvalds
hfs_mdb_name(struct super_block * sb)2781da177e4SLinus Torvalds static inline const char *hfs_mdb_name(struct super_block *sb)
2791da177e4SLinus Torvalds {
2801da177e4SLinus Torvalds return sb->s_id;
2811da177e4SLinus Torvalds }
2821da177e4SLinus Torvalds
hfs_bitmap_dirty(struct super_block * sb)2831da177e4SLinus Torvalds static inline void hfs_bitmap_dirty(struct super_block *sb)
2841da177e4SLinus Torvalds {
2851da177e4SLinus Torvalds set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
2865687b578SArtem Bityutskiy hfs_mark_mdb_dirty(sb);
2871da177e4SLinus Torvalds }
2881da177e4SLinus Torvalds
2891da177e4SLinus Torvalds #define sb_bread512(sb, sec, data) ({ \
2901da177e4SLinus Torvalds struct buffer_head *__bh; \
2911da177e4SLinus Torvalds sector_t __block; \
2921da177e4SLinus Torvalds loff_t __start; \
2931da177e4SLinus Torvalds int __offset; \
2941da177e4SLinus Torvalds \
2951da177e4SLinus Torvalds __start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
2961da177e4SLinus Torvalds __block = __start >> (sb)->s_blocksize_bits; \
2971da177e4SLinus Torvalds __offset = __start & ((sb)->s_blocksize - 1); \
2981da177e4SLinus Torvalds __bh = sb_bread((sb), __block); \
2991da177e4SLinus Torvalds if (likely(__bh != NULL)) \
3001da177e4SLinus Torvalds data = (void *)(__bh->b_data + __offset);\
3011da177e4SLinus Torvalds else \
3021da177e4SLinus Torvalds data = NULL; \
3031da177e4SLinus Torvalds __bh; \
3041da177e4SLinus Torvalds })
3051da177e4SLinus Torvalds
3061da177e4SLinus Torvalds #endif
307