[deliverable/linux.git] / fs / hfsplus / hfsplus_fs.h

/*
 *  linux/include/linux/hfsplus_fs.h
 *
 * Copyright (C) 1999
 * Brad Boyer (flar@pants.nu)
 * (C) 2003 Ardis Technologies <roman@ardistech.com>
 *
 */

#ifndef _LINUX_HFSPLUS_FS_H
#define _LINUX_HFSPLUS_FS_H

#ifdef pr_fmt
#undef pr_fmt
#endif

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/fs.h>
#include <linux/mutex.h>
#include <linux/buffer_head.h>
#include <linux/blkdev.h>
#include "hfsplus_raw.h"

#define DBG_BNODE_REFS	0x00000001
#define DBG_BNODE_MOD	0x00000002
#define DBG_CAT_MOD	0x00000004
#define DBG_INODE	0x00000008
#define DBG_SUPER	0x00000010
#define DBG_EXTENT	0x00000020
#define DBG_BITMAP	0x00000040
#define DBG_ATTR_MOD	0x00000080
#define DBG_ACL_MOD	0x00000100

#if 0
#define DBG_MASK	(DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
#define DBG_MASK	(DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
#define DBG_MASK	(DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
#endif
#define DBG_MASK	(0)

#define hfs_dbg(flg, fmt, ...)					\
do {								\
	if (DBG_##flg & DBG_MASK)				\
		printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
} while (0)

#define hfs_dbg_cont(flg, fmt, ...)				\
do {								\
	if (DBG_##flg & DBG_MASK)				\
		pr_cont(fmt, ##__VA_ARGS__);			\
} while (0)

/* Runtime config options */
#define HFSPLUS_DEF_CR_TYPE    0x3F3F3F3F  /* '????' */

#define HFSPLUS_TYPE_DATA 0x00
#define HFSPLUS_TYPE_RSRC 0xFF

typedef int (*btree_keycmp)(const hfsplus_btree_key *,
		const hfsplus_btree_key *);

#define NODE_HASH_SIZE	256

/* B-tree mutex nested subclasses */
enum hfsplus_btree_mutex_classes {
	CATALOG_BTREE_MUTEX,
	EXTENTS_BTREE_MUTEX,
	ATTR_BTREE_MUTEX,
};

/* An HFS+ BTree held in memory */
struct hfs_btree {
	struct super_block *sb;
	struct inode *inode;
	btree_keycmp keycmp;

	u32 cnid;
	u32 root;
	u32 leaf_count;
	u32 leaf_head;
	u32 leaf_tail;
	u32 node_count;
	u32 free_nodes;
	u32 attributes;

	unsigned int node_size;
	unsigned int node_size_shift;
	unsigned int max_key_len;
	unsigned int depth;

	struct mutex tree_lock;

	unsigned int pages_per_bnode;
	spinlock_t hash_lock;
	struct hfs_bnode *node_hash[NODE_HASH_SIZE];
	int node_hash_cnt;
};

struct page;

/* An HFS+ BTree node in memory */
struct hfs_bnode {
	struct hfs_btree *tree;

	u32 prev;
	u32 this;
	u32 next;
	u32 parent;

	u16 num_recs;
	u8 type;
	u8 height;

	struct hfs_bnode *next_hash;
	unsigned long flags;
	wait_queue_head_t lock_wq;
	atomic_t refcnt;
	unsigned int page_offset;
	struct page *page[0];
};

#define HFS_BNODE_LOCK		0
#define HFS_BNODE_ERROR		1
#define HFS_BNODE_NEW		2
#define HFS_BNODE_DIRTY		3
#define HFS_BNODE_DELETED	4

/*
 * Attributes file states
 */
#define HFSPLUS_EMPTY_ATTR_TREE		0
#define HFSPLUS_CREATING_ATTR_TREE	1
#define HFSPLUS_VALID_ATTR_TREE		2
#define HFSPLUS_FAILED_ATTR_TREE	3

/*
 * HFS+ superblock info (built from Volume Header on disk)
 */

struct hfsplus_vh;
struct hfs_btree;

struct hfsplus_sb_info {
	void *s_vhdr_buf;
	struct hfsplus_vh *s_vhdr;
	void *s_backup_vhdr_buf;
	struct hfsplus_vh *s_backup_vhdr;
	struct hfs_btree *ext_tree;
	struct hfs_btree *cat_tree;
	struct hfs_btree *attr_tree;
	atomic_t attr_tree_state;
	struct inode *alloc_file;
	struct inode *hidden_dir;
	struct nls_table *nls;

	/* Runtime variables */
	u32 blockoffset;
	sector_t part_start;
	sector_t sect_count;
	int fs_shift;

	/* immutable data from the volume header */
	u32 alloc_blksz;
	int alloc_blksz_shift;
	u32 total_blocks;
	u32 data_clump_blocks, rsrc_clump_blocks;

	/* mutable data from the volume header, protected by alloc_mutex */
	u32 free_blocks;
	struct mutex alloc_mutex;

	/* mutable data from the volume header, protected by vh_mutex */
	u32 next_cnid;
	u32 file_count;
	u32 folder_count;
	struct mutex vh_mutex;

	/* Config options */
	u32 creator;
	u32 type;

	umode_t umask;
	kuid_t uid;
	kgid_t gid;

	int part, session;
	unsigned long flags;

	int work_queued;               /* non-zero delayed work is queued */
	struct delayed_work sync_work; /* FS sync delayed work */
	spinlock_t work_lock;          /* protects sync_work and work_queued */
};

#define HFSPLUS_SB_WRITEBACKUP	0
#define HFSPLUS_SB_NODECOMPOSE	1
#define HFSPLUS_SB_FORCE	2
#define HFSPLUS_SB_HFSX		3
#define HFSPLUS_SB_CASEFOLD	4
#define HFSPLUS_SB_NOBARRIER	5

static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
{
	return sb->s_fs_info;
}


struct hfsplus_inode_info {
	atomic_t opencnt;

	/*
	 * Extent allocation information, protected by extents_lock.
	 */
	u32 first_blocks;
	u32 clump_blocks;
	u32 alloc_blocks;
	u32 cached_start;
	u32 cached_blocks;
	hfsplus_extent_rec first_extents;
	hfsplus_extent_rec cached_extents;
	unsigned int extent_state;
	struct mutex extents_lock;

	/*
	 * Immutable data.
	 */
	struct inode *rsrc_inode;
	__be32 create_date;

	/*
	 * Protected by sbi->vh_mutex.
	 */
	u32 linkid;

	/*
	 * Accessed using atomic bitops.
	 */
	unsigned long flags;

	/*
	 * Protected by i_mutex.
	 */
	sector_t fs_blocks;
	u8 userflags;		/* BSD user file flags */
	u32 subfolders;		/* Subfolder count (HFSX only) */
	struct list_head open_dir_list;
	loff_t phys_size;

	struct inode vfs_inode;
};

#define HFSPLUS_EXT_DIRTY	0x0001
#define HFSPLUS_EXT_NEW		0x0002

#define HFSPLUS_I_RSRC		0	/* represents a resource fork */
#define HFSPLUS_I_CAT_DIRTY	1	/* has changes in the catalog tree */
#define HFSPLUS_I_EXT_DIRTY	2	/* has changes in the extent tree */
#define HFSPLUS_I_ALLOC_DIRTY	3	/* has changes in the allocation file */
#define HFSPLUS_I_ATTR_DIRTY	4	/* has changes in the attributes tree */

#define HFSPLUS_IS_RSRC(inode) \
	test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)

static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
{
	return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
}

/*
 * Mark an inode dirty, and also mark the btree in which the
 * specific type of metadata is stored.
 * For data or metadata that gets written back by into the catalog btree
 * by hfsplus_write_inode a plain mark_inode_dirty call is enough.
 */
static inline void hfsplus_mark_inode_dirty(struct inode *inode,
		unsigned int flag)
{
	set_bit(flag, &HFSPLUS_I(inode)->flags);
	mark_inode_dirty(inode);
}

struct hfs_find_data {
	/* filled by caller */
	hfsplus_btree_key *search_key;
	hfsplus_btree_key *key;
	/* filled by find */
	struct hfs_btree *tree;
	struct hfs_bnode *bnode;
	/* filled by findrec */
	int record;
	int keyoffset, keylength;
	int entryoffset, entrylength;
};

struct hfsplus_readdir_data {
	struct list_head list;
	struct file *file;
	struct hfsplus_cat_key key;
};

/*
 * Find minimum acceptible I/O size for an hfsplus sb.
 */
static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
{
	return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev),
		     HFSPLUS_SECTOR_SIZE);
}

#define hfs_btree_open hfsplus_btree_open
#define hfs_btree_close hfsplus_btree_close
#define hfs_btree_write hfsplus_btree_write
#define hfs_bmap_alloc hfsplus_bmap_alloc
#define hfs_bmap_free hfsplus_bmap_free
#define hfs_bnode_read hfsplus_bnode_read
#define hfs_bnode_read_u16 hfsplus_bnode_read_u16
#define hfs_bnode_read_u8 hfsplus_bnode_read_u8
#define hfs_bnode_read_key hfsplus_bnode_read_key
#define hfs_bnode_write hfsplus_bnode_write
#define hfs_bnode_write_u16 hfsplus_bnode_write_u16
#define hfs_bnode_clear hfsplus_bnode_clear
#define hfs_bnode_copy hfsplus_bnode_copy
#define hfs_bnode_move hfsplus_bnode_move
#define hfs_bnode_dump hfsplus_bnode_dump
#define hfs_bnode_unlink hfsplus_bnode_unlink
#define hfs_bnode_findhash hfsplus_bnode_findhash
#define hfs_bnode_find hfsplus_bnode_find
#define hfs_bnode_unhash hfsplus_bnode_unhash
#define hfs_bnode_free hfsplus_bnode_free
#define hfs_bnode_create hfsplus_bnode_create
#define hfs_bnode_get hfsplus_bnode_get
#define hfs_bnode_put hfsplus_bnode_put
#define hfs_brec_lenoff hfsplus_brec_lenoff
#define hfs_brec_keylen hfsplus_brec_keylen
#define hfs_brec_insert hfsplus_brec_insert
#define hfs_brec_remove hfsplus_brec_remove
#define hfs_find_init hfsplus_find_init
#define hfs_find_exit hfsplus_find_exit
#define __hfs_brec_find __hfsplus_brec_find
#define hfs_brec_find hfsplus_brec_find
#define hfs_brec_read hfsplus_brec_read
#define hfs_brec_goto hfsplus_brec_goto
#define hfs_part_find hfsplus_part_find

/*
 * definitions for ext2 flag ioctls (linux really needs a generic
 * interface for this).
 */

/* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
 * chattr/lsattr */
#define HFSPLUS_IOC_EXT2_GETFLAGS	FS_IOC_GETFLAGS
#define HFSPLUS_IOC_EXT2_SETFLAGS	FS_IOC_SETFLAGS


/*
 * hfs+-specific ioctl for making the filesystem bootable
 */
#define HFSPLUS_IOC_BLESS _IO('h', 0x80)

typedef int (*search_strategy_t)(struct hfs_bnode *,
				struct hfs_find_data *,
				int *, int *, int *);

/*
 * Functions in any *.c used in other files
 */

/* attributes.c */
int hfsplus_create_attr_tree_cache(void);
void hfsplus_destroy_attr_tree_cache(void);
hfsplus_attr_entry *hfsplus_alloc_attr_entry(void);
void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry_p);
int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *,
		const hfsplus_btree_key *);
int hfsplus_attr_build_key(struct super_block *, hfsplus_btree_key *,
			u32, const char *);
void hfsplus_attr_build_key_uni(hfsplus_btree_key *key,
					u32 cnid,
					struct hfsplus_attr_unistr *name);
int hfsplus_find_attr(struct super_block *, u32,
			const char *, struct hfs_find_data *);
int hfsplus_attr_exists(struct inode *inode, const char *name);
int hfsplus_create_attr(struct inode *, const char *, const void *, size_t);
int hfsplus_delete_attr(struct inode *, const char *);
int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid);

/* bitmap.c */
int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
int hfsplus_block_free(struct super_block *, u32, u32);

/* btree.c */
u32 hfsplus_calc_btree_clump_size(u32, u32, u64, int);
struct hfs_btree *hfs_btree_open(struct super_block *, u32);
void hfs_btree_close(struct hfs_btree *);
int hfs_btree_write(struct hfs_btree *);
struct hfs_bnode *hfs_bmap_alloc(struct hfs_btree *);
void hfs_bmap_free(struct hfs_bnode *);

/* bnode.c */
void hfs_bnode_read(struct hfs_bnode *, void *, int, int);
u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
void hfs_bnode_read_key(struct hfs_bnode *, void *, int);
void hfs_bnode_write(struct hfs_bnode *, void *, int, int);
void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
void hfs_bnode_clear(struct hfs_bnode *, int, int);
void hfs_bnode_copy(struct hfs_bnode *, int,
		    struct hfs_bnode *, int, int);
void hfs_bnode_move(struct hfs_bnode *, int, int, int);
void hfs_bnode_dump(struct hfs_bnode *);
void hfs_bnode_unlink(struct hfs_bnode *);
struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *, u32);
struct hfs_bnode *hfs_bnode_find(struct hfs_btree *, u32);
void hfs_bnode_unhash(struct hfs_bnode *);
void hfs_bnode_free(struct hfs_bnode *);
struct hfs_bnode *hfs_bnode_create(struct hfs_btree *, u32);
void hfs_bnode_get(struct hfs_bnode *);
void hfs_bnode_put(struct hfs_bnode *);

/* brec.c */
u16 hfs_brec_lenoff(struct hfs_bnode *, u16, u16 *);
u16 hfs_brec_keylen(struct hfs_bnode *, u16);
int hfs_brec_insert(struct hfs_find_data *, void *, int);
int hfs_brec_remove(struct hfs_find_data *);

/* bfind.c */
int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
void hfs_find_exit(struct hfs_find_data *);
int hfs_find_1st_rec_by_cnid(struct hfs_bnode *,
				struct hfs_find_data *,
				int *, int *, int *);
int hfs_find_rec_by_key(struct hfs_bnode *,
				struct hfs_find_data *,
				int *, int *, int *);
int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *,
				search_strategy_t);
int hfs_brec_find(struct hfs_find_data *, search_strategy_t);
int hfs_brec_read(struct hfs_find_data *, void *, int);
int hfs_brec_goto(struct hfs_find_data *, int);

/* catalog.c */
int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *,
		const hfsplus_btree_key *);
int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *,
		const hfsplus_btree_key *);
void hfsplus_cat_build_key(struct super_block *sb,
		hfsplus_btree_key *, u32, struct qstr *);
int hfsplus_find_cat(struct super_block *, u32, struct hfs_find_data *);
int hfsplus_create_cat(u32, struct inode *, struct qstr *, struct inode *);
int hfsplus_delete_cat(u32, struct inode *, struct qstr *);
int hfsplus_rename_cat(u32, struct inode *, struct qstr *,
		       struct inode *, struct qstr *);
void hfsplus_cat_set_perms(struct inode *inode, struct hfsplus_perm *perms);

/* dir.c */
extern const struct inode_operations hfsplus_dir_inode_operations;
extern const struct file_operations hfsplus_dir_operations;

/* extents.c */
int hfsplus_ext_cmp_key(const hfsplus_btree_key *, const hfsplus_btree_key *);
int hfsplus_ext_write_extent(struct inode *);
int hfsplus_get_block(struct inode *, sector_t, struct buffer_head *, int);
int hfsplus_free_fork(struct super_block *, u32,
		struct hfsplus_fork_raw *, int);
int hfsplus_file_extend(struct inode *);
void hfsplus_file_truncate(struct inode *);

/* inode.c */
extern const struct address_space_operations hfsplus_aops;
extern const struct address_space_operations hfsplus_btree_aops;
extern const struct dentry_operations hfsplus_dentry_operations;

void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *);
void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *);
int hfsplus_cat_read_inode(struct inode *, struct hfs_find_data *);
int hfsplus_cat_write_inode(struct inode *);
struct inode *hfsplus_new_inode(struct super_block *, umode_t);
void hfsplus_delete_inode(struct inode *);
int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
		       int datasync);

/* ioctl.c */
long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);

/* options.c */
int hfsplus_parse_options(char *, struct hfsplus_sb_info *);
int hfsplus_parse_options_remount(char *input, int *force);
void hfsplus_fill_defaults(struct hfsplus_sb_info *);
int hfsplus_show_options(struct seq_file *, struct dentry *);

/* super.c */
struct inode *hfsplus_iget(struct super_block *, unsigned long);
void hfsplus_mark_mdb_dirty(struct super_block *sb);

/* tables.c */
extern u16 hfsplus_case_fold_table[];
extern u16 hfsplus_decompose_table[];
extern u16 hfsplus_compose_table[];

/* unicode.c */
int hfsplus_strcasecmp(const struct hfsplus_unistr *,
		const struct hfsplus_unistr *);
int hfsplus_strcmp(const struct hfsplus_unistr *,
		const struct hfsplus_unistr *);
int hfsplus_uni2asc(struct super_block *,
		const struct hfsplus_unistr *, char *, int *);
int hfsplus_asc2uni(struct super_block *,
		struct hfsplus_unistr *, int, const char *, int);
int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str);
int hfsplus_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
		unsigned int len, const char *str, const struct qstr *name);

/* wrapper.c */
int hfsplus_read_wrapper(struct super_block *);
int hfs_part_find(struct super_block *, sector_t *, sector_t *);
int hfsplus_submit_bio(struct super_block *sb, sector_t sector,
		void *buf, void **data, int rw);

/* time macros */
#define __hfsp_mt2ut(t)		(be32_to_cpu(t) - 2082844800U)
#define __hfsp_ut2mt(t)		(cpu_to_be32(t + 2082844800U))

/* compatibility */
#define hfsp_mt2ut(t)		(struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
#define hfsp_ut2mt(t)		__hfsp_ut2mt((t).tv_sec)
#define hfsp_now2mt()		__hfsp_ut2mt(get_seconds())

#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/include/linux/hfsplus_fs.h
	3	*
	4	* Copyright (C) 1999
	5	* Brad Boyer (flar@pants.nu)
	6	* (C) 2003 Ardis Technologies <roman@ardistech.com>
	7	*
	8	*/
	9
	10	#ifndef _LINUX_HFSPLUS_FS_H
	11	#define _LINUX_HFSPLUS_FS_H
	12
d6142673 JP	13	#ifdef pr_fmt
	14	#undef pr_fmt
	15	#endif
	16
	17	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	18
1da177e4	19	#include <linux/fs.h>
895c23f8	20	#include <linux/mutex.h>
1da177e4	21	#include <linux/buffer_head.h>
6596528e	22	#include <linux/blkdev.h>
1da177e4 LT	23	#include "hfsplus_raw.h"
	24
	25	#define DBG_BNODE_REFS 0x00000001
	26	#define DBG_BNODE_MOD 0x00000002
	27	#define DBG_CAT_MOD 0x00000004
	28	#define DBG_INODE 0x00000008
	29	#define DBG_SUPER 0x00000010
	30	#define DBG_EXTENT 0x00000020
	31	#define DBG_BITMAP 0x00000040
324ef39a	32	#define DBG_ATTR_MOD 0x00000080
2c92057e	33	#define DBG_ACL_MOD 0x00000100
1da177e4	34
21f2296a AS	35	#if 0
	36	#define DBG_MASK (DBG_EXTENT\|DBG_INODE\|DBG_BNODE_MOD)
	37	#define DBG_MASK (DBG_BNODE_MOD\|DBG_CAT_MOD\|DBG_INODE)
	38	#define DBG_MASK (DBG_CAT_MOD\|DBG_BNODE_REFS\|DBG_INODE\|DBG_EXTENT)
	39	#endif
1da177e4 LT	40	#define DBG_MASK (0)
1da177e4 LT	41
d6142673 JP	42	#define hfs_dbg(flg, fmt, ...) \
	43	do { \
	44	if (DBG_##flg & DBG_MASK) \
	45	printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__); \
c2b3e1f7 JP	46	} while (0)
c2b3e1f7 JP	47
d6142673 JP	48	#define hfs_dbg_cont(flg, fmt, ...) \
	49	do { \
	50	if (DBG_##flg & DBG_MASK) \
	51	pr_cont(fmt, ##__VA_ARGS__); \
c2b3e1f7	52	} while (0)
1da177e4 LT	53
	54	/* Runtime config options */
	55	#define HFSPLUS_DEF_CR_TYPE 0x3F3F3F3F /* '????' */
	56
	57	#define HFSPLUS_TYPE_DATA 0x00
	58	#define HFSPLUS_TYPE_RSRC 0xFF
	59
2753cc28 AS	60	typedef int (btree_keycmp)(const hfsplus_btree_key ,
2753cc28 AS	61	const hfsplus_btree_key *);
1da177e4 LT	62
	63	#define NODE_HASH_SIZE 256
	64
324ef39a VD	65	/* B-tree mutex nested subclasses */
	66	enum hfsplus_btree_mutex_classes {
	67	CATALOG_BTREE_MUTEX,
	68	EXTENTS_BTREE_MUTEX,
	69	ATTR_BTREE_MUTEX,
	70	};
	71
1da177e4 LT	72	/* An HFS+ BTree held in memory */
	73	struct hfs_btree {
	74	struct super_block *sb;
	75	struct inode *inode;
	76	btree_keycmp keycmp;
	77
	78	u32 cnid;
	79	u32 root;
	80	u32 leaf_count;
	81	u32 leaf_head;
	82	u32 leaf_tail;
	83	u32 node_count;
	84	u32 free_nodes;
	85	u32 attributes;
	86
	87	unsigned int node_size;
	88	unsigned int node_size_shift;
	89	unsigned int max_key_len;
	90	unsigned int depth;
	91
467c3d9c	92	struct mutex tree_lock;
1da177e4 LT	93
	94	unsigned int pages_per_bnode;
	95	spinlock_t hash_lock;
	96	struct hfs_bnode *node_hash[NODE_HASH_SIZE];
	97	int node_hash_cnt;
	98	};
	99
	100	struct page;
	101
	102	/* An HFS+ BTree node in memory */
	103	struct hfs_bnode {
	104	struct hfs_btree *tree;
	105
	106	u32 prev;
	107	u32 this;
	108	u32 next;
	109	u32 parent;
	110
	111	u16 num_recs;
	112	u8 type;
	113	u8 height;
	114
	115	struct hfs_bnode *next_hash;
	116	unsigned long flags;
	117	wait_queue_head_t lock_wq;
	118	atomic_t refcnt;
	119	unsigned int page_offset;
	120	struct page *page[0];
	121	};
	122
	123	#define HFS_BNODE_LOCK 0
	124	#define HFS_BNODE_ERROR 1
	125	#define HFS_BNODE_NEW 2
	126	#define HFS_BNODE_DIRTY 3
	127	#define HFS_BNODE_DELETED 4
	128
95e0d7db VD	129	/*
	130	* Attributes file states
	131	*/
	132	#define HFSPLUS_EMPTY_ATTR_TREE 0
	133	#define HFSPLUS_CREATING_ATTR_TREE 1
	134	#define HFSPLUS_VALID_ATTR_TREE 2
	135	#define HFSPLUS_FAILED_ATTR_TREE 3
	136
1da177e4 LT	137	/*
	138	* HFS+ superblock info (built from Volume Header on disk)
	139	*/
	140
	141	struct hfsplus_vh;
	142	struct hfs_btree;
	143
	144	struct hfsplus_sb_info {
6596528e	145	void *s_vhdr_buf;
1da177e4	146	struct hfsplus_vh *s_vhdr;
6596528e	147	void *s_backup_vhdr_buf;
52399b17	148	struct hfsplus_vh *s_backup_vhdr;
1da177e4 LT	149	struct hfs_btree *ext_tree;
	150	struct hfs_btree *cat_tree;
	151	struct hfs_btree *attr_tree;
95e0d7db	152	atomic_t attr_tree_state;
1da177e4 LT	153	struct inode *alloc_file;
	154	struct inode *hidden_dir;
	155	struct nls_table *nls;
	156
	157	/* Runtime variables */
	158	u32 blockoffset;
52399b17 CH	159	sector_t part_start;
52399b17 CH	160	sector_t sect_count;
1da177e4 LT	161	int fs_shift;
1da177e4 LT	162
7ac9fb9c	163	/* immutable data from the volume header */
1da177e4 LT	164	u32 alloc_blksz;
	165	int alloc_blksz_shift;
	166	u32 total_blocks;
7ac9fb9c CH	167	u32 data_clump_blocks, rsrc_clump_blocks;
	168
	169	/* mutable data from the volume header, protected by alloc_mutex */
1da177e4	170	u32 free_blocks;
7ac9fb9c CH	171	struct mutex alloc_mutex;
	172
	173	/* mutable data from the volume header, protected by vh_mutex */
1da177e4 LT	174	u32 next_cnid;
	175	u32 file_count;
	176	u32 folder_count;
7ac9fb9c	177	struct mutex vh_mutex;
1da177e4 LT	178
	179	/* Config options */
	180	u32 creator;
	181	u32 type;
	182
	183	umode_t umask;
16525e3f EB	184	kuid_t uid;
16525e3f EB	185	kgid_t gid;
1da177e4 LT	186
1da177e4 LT	187	int part, session;
1da177e4	188	unsigned long flags;
9e6c5829 AB	189
	190	int work_queued; /* non-zero delayed work is queued */
	191	struct delayed_work sync_work; /* FS sync delayed work */
	192	spinlock_t work_lock; /* protects sync_work and work_queued */
1da177e4 LT	193	};
1da177e4 LT	194
84adede3 CH	195	#define HFSPLUS_SB_WRITEBACKUP 0
	196	#define HFSPLUS_SB_NODECOMPOSE 1
	197	#define HFSPLUS_SB_FORCE 2
	198	#define HFSPLUS_SB_HFSX 3
	199	#define HFSPLUS_SB_CASEFOLD 4
34a2d313	200	#define HFSPLUS_SB_NOBARRIER 5
1da177e4	201
e3494705 CH	202	static inline struct hfsplus_sb_info HFSPLUS_SB(struct super_block sb)
	203	{
	204	return sb->s_fs_info;
	205	}
1da177e4 LT	206
	207
	208	struct hfsplus_inode_info {
1da177e4 LT	209	atomic_t opencnt;
1da177e4 LT	210
7fcc99f4 CH	211	/*
	212	* Extent allocation information, protected by extents_lock.
	213	*/
	214	u32 first_blocks;
	215	u32 clump_blocks;
	216	u32 alloc_blocks;
	217	u32 cached_start;
	218	u32 cached_blocks;
	219	hfsplus_extent_rec first_extents;
	220	hfsplus_extent_rec cached_extents;
b33b7921	221	unsigned int extent_state;
7fcc99f4	222	struct mutex extents_lock;
1da177e4	223
7fcc99f4 CH	224	/*
	225	* Immutable data.
	226	*/
	227	struct inode *rsrc_inode;
9a4cad95	228	__be32 create_date;
f6089ff8 CH	229
	230	/*
	231	* Protected by sbi->vh_mutex.
	232	*/
	233	u32 linkid;
1da177e4	234
b33b7921 CH	235	/*
	236	* Accessed using atomic bitops.
	237	*/
	238	unsigned long flags;
	239
7fcc99f4 CH	240	/*
	241	* Protected by i_mutex.
	242	*/
	243	sector_t fs_blocks;
722c55d1	244	u8 userflags; /* BSD user file flags */
d7d673a5	245	u32 subfolders; /* Subfolder count (HFSX only) */
1da177e4 LT	246	struct list_head open_dir_list;
1da177e4 LT	247	loff_t phys_size;
7fcc99f4	248
1da177e4 LT	249	struct inode vfs_inode;
	250	};
	251
b33b7921 CH	252	#define HFSPLUS_EXT_DIRTY 0x0001
	253	#define HFSPLUS_EXT_NEW 0x0002
	254
	255	#define HFSPLUS_I_RSRC 0 /* represents a resource fork */
e3494705 CH	256	#define HFSPLUS_I_CAT_DIRTY 1 /* has changes in the catalog tree */
	257	#define HFSPLUS_I_EXT_DIRTY 2 /* has changes in the extent tree */
	258	#define HFSPLUS_I_ALLOC_DIRTY 3 /* has changes in the allocation file */
324ef39a	259	#define HFSPLUS_I_ATTR_DIRTY 4 /* has changes in the attributes tree */
1da177e4	260
b33b7921 CH	261	#define HFSPLUS_IS_RSRC(inode) \
b33b7921 CH	262	test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)
1da177e4	263
e3494705 CH	264	static inline struct hfsplus_inode_info HFSPLUS_I(struct inode inode)
	265	{
	266	return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
	267	}
1da177e4	268
e3494705 CH	269	/*
	270	* Mark an inode dirty, and also mark the btree in which the
	271	* specific type of metadata is stored.
	272	* For data or metadata that gets written back by into the catalog btree
	273	* by hfsplus_write_inode a plain mark_inode_dirty call is enough.
	274	*/
	275	static inline void hfsplus_mark_inode_dirty(struct inode *inode,
	276	unsigned int flag)
	277	{
	278	set_bit(flag, &HFSPLUS_I(inode)->flags);
	279	mark_inode_dirty(inode);
	280	}
1da177e4 LT	281
	282	struct hfs_find_data {
	283	/* filled by caller */
	284	hfsplus_btree_key *search_key;
	285	hfsplus_btree_key *key;
	286	/* filled by find */
	287	struct hfs_btree *tree;
	288	struct hfs_bnode *bnode;
	289	/* filled by findrec */
	290	int record;
	291	int keyoffset, keylength;
	292	int entryoffset, entrylength;
	293	};
	294
	295	struct hfsplus_readdir_data {
	296	struct list_head list;
	297	struct file *file;
	298	struct hfsplus_cat_key key;
	299	};
	300
6596528e SF	301	/*
	302	* Find minimum acceptible I/O size for an hfsplus sb.
	303	*/
	304	static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
	305	{
	306	return max_t(unsigned short, bdev_logical_block_size(sb->s_bdev),
	307	HFSPLUS_SECTOR_SIZE);
	308	}
	309
1da177e4 LT	310	#define hfs_btree_open hfsplus_btree_open
	311	#define hfs_btree_close hfsplus_btree_close
	312	#define hfs_btree_write hfsplus_btree_write
	313	#define hfs_bmap_alloc hfsplus_bmap_alloc
	314	#define hfs_bmap_free hfsplus_bmap_free
	315	#define hfs_bnode_read hfsplus_bnode_read
	316	#define hfs_bnode_read_u16 hfsplus_bnode_read_u16
	317	#define hfs_bnode_read_u8 hfsplus_bnode_read_u8
	318	#define hfs_bnode_read_key hfsplus_bnode_read_key
	319	#define hfs_bnode_write hfsplus_bnode_write
	320	#define hfs_bnode_write_u16 hfsplus_bnode_write_u16
	321	#define hfs_bnode_clear hfsplus_bnode_clear
	322	#define hfs_bnode_copy hfsplus_bnode_copy
	323	#define hfs_bnode_move hfsplus_bnode_move
	324	#define hfs_bnode_dump hfsplus_bnode_dump
	325	#define hfs_bnode_unlink hfsplus_bnode_unlink
	326	#define hfs_bnode_findhash hfsplus_bnode_findhash
	327	#define hfs_bnode_find hfsplus_bnode_find
	328	#define hfs_bnode_unhash hfsplus_bnode_unhash
	329	#define hfs_bnode_free hfsplus_bnode_free
	330	#define hfs_bnode_create hfsplus_bnode_create
	331	#define hfs_bnode_get hfsplus_bnode_get
	332	#define hfs_bnode_put hfsplus_bnode_put
	333	#define hfs_brec_lenoff hfsplus_brec_lenoff
	334	#define hfs_brec_keylen hfsplus_brec_keylen
	335	#define hfs_brec_insert hfsplus_brec_insert
	336	#define hfs_brec_remove hfsplus_brec_remove
	337	#define hfs_find_init hfsplus_find_init
	338	#define hfs_find_exit hfsplus_find_exit
324ef39a	339	#define __hfs_brec_find __hfsplus_brec_find
1da177e4 LT	340	#define hfs_brec_find hfsplus_brec_find
	341	#define hfs_brec_read hfsplus_brec_read
	342	#define hfs_brec_goto hfsplus_brec_goto
	343	#define hfs_part_find hfsplus_part_find
	344
	345	/*
	346	* definitions for ext2 flag ioctls (linux really needs a generic
	347	* interface for this).
	348	*/
	349
	350	/* ext2 ioctls (EXT2_IOC_GETFLAGS and EXT2_IOC_SETFLAGS) to support
	351	* chattr/lsattr */
36695673 DH	352	#define HFSPLUS_IOC_EXT2_GETFLAGS FS_IOC_GETFLAGS
36695673 DH	353	#define HFSPLUS_IOC_EXT2_SETFLAGS FS_IOC_SETFLAGS
1da177e4 LT	354
1da177e4 LT	355
a051f71c MG	356	/*
	357	* hfs+-specific ioctl for making the filesystem bootable
	358	*/
	359	#define HFSPLUS_IOC_BLESS _IO('h', 0x80)
	360
324ef39a VD	361	typedef int (search_strategy_t)(struct hfs_bnode ,
	362	struct hfs_find_data *,
	363	int , int , int *);
	364
1da177e4 LT	365	/*
	366	* Functions in any *.c used in other files
	367	*/
	368
324ef39a VD	369	/* attributes.c */
	370	int hfsplus_create_attr_tree_cache(void);
	371	void hfsplus_destroy_attr_tree_cache(void);
	372	hfsplus_attr_entry *hfsplus_alloc_attr_entry(void);
	373	void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry_p);
	374	int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *,
	375	const hfsplus_btree_key *);
	376	int hfsplus_attr_build_key(struct super_block , hfsplus_btree_key ,
	377	u32, const char *);
	378	void hfsplus_attr_build_key_uni(hfsplus_btree_key *key,
	379	u32 cnid,
	380	struct hfsplus_attr_unistr *name);
	381	int hfsplus_find_attr(struct super_block *, u32,
	382	const char , struct hfs_find_data );
	383	int hfsplus_attr_exists(struct inode inode, const char name);
	384	int hfsplus_create_attr(struct inode , const char , const void *, size_t);
	385	int hfsplus_delete_attr(struct inode , const char );
	386	int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid);
	387
1da177e4 LT	388	/* bitmap.c */
	389	int hfsplus_block_allocate(struct super_block , u32, u32, u32 );
	390	int hfsplus_block_free(struct super_block *, u32, u32);
	391
	392	/* btree.c */
b3b5b0f0	393	u32 hfsplus_calc_btree_clump_size(u32, u32, u64, int);
1da177e4 LT	394	struct hfs_btree hfs_btree_open(struct super_block , u32);
1da177e4 LT	395	void hfs_btree_close(struct hfs_btree *);
81cc7fad	396	int hfs_btree_write(struct hfs_btree *);
1da177e4 LT	397	struct hfs_bnode hfs_bmap_alloc(struct hfs_btree );
	398	void hfs_bmap_free(struct hfs_bnode *);
	399
	400	/* bnode.c */
	401	void hfs_bnode_read(struct hfs_bnode , void , int, int);
	402	u16 hfs_bnode_read_u16(struct hfs_bnode *, int);
	403	u8 hfs_bnode_read_u8(struct hfs_bnode *, int);
	404	void hfs_bnode_read_key(struct hfs_bnode , void , int);
	405	void hfs_bnode_write(struct hfs_bnode , void , int, int);
	406	void hfs_bnode_write_u16(struct hfs_bnode *, int, u16);
	407	void hfs_bnode_clear(struct hfs_bnode *, int, int);
	408	void hfs_bnode_copy(struct hfs_bnode *, int,
	409	struct hfs_bnode *, int, int);
	410	void hfs_bnode_move(struct hfs_bnode *, int, int, int);
	411	void hfs_bnode_dump(struct hfs_bnode *);
	412	void hfs_bnode_unlink(struct hfs_bnode *);
	413	struct hfs_bnode hfs_bnode_findhash(struct hfs_btree , u32);
	414	struct hfs_bnode hfs_bnode_find(struct hfs_btree , u32);
	415	void hfs_bnode_unhash(struct hfs_bnode *);
	416	void hfs_bnode_free(struct hfs_bnode *);
	417	struct hfs_bnode hfs_bnode_create(struct hfs_btree , u32);
	418	void hfs_bnode_get(struct hfs_bnode *);
	419	void hfs_bnode_put(struct hfs_bnode *);
	420
	421	/* brec.c */
	422	u16 hfs_brec_lenoff(struct hfs_bnode , u16, u16 );
	423	u16 hfs_brec_keylen(struct hfs_bnode *, u16);
	424	int hfs_brec_insert(struct hfs_find_data , void , int);
	425	int hfs_brec_remove(struct hfs_find_data *);
	426
	427	/* bfind.c */
	428	int hfs_find_init(struct hfs_btree , struct hfs_find_data );
	429	void hfs_find_exit(struct hfs_find_data *);
324ef39a VD	430	int hfs_find_1st_rec_by_cnid(struct hfs_bnode *,
	431	struct hfs_find_data *,
	432	int , int , int *);
	433	int hfs_find_rec_by_key(struct hfs_bnode *,
	434	struct hfs_find_data *,
	435	int , int , int *);
	436	int __hfs_brec_find(struct hfs_bnode , struct hfs_find_data ,
	437	search_strategy_t);
	438	int hfs_brec_find(struct hfs_find_data *, search_strategy_t);
1da177e4 LT	439	int hfs_brec_read(struct hfs_find_data , void , int);
	440	int hfs_brec_goto(struct hfs_find_data *, int);
	441
	442	/* catalog.c */
2753cc28 AS	443	int hfsplus_cat_case_cmp_key(const hfsplus_btree_key *,
	444	const hfsplus_btree_key *);
	445	int hfsplus_cat_bin_cmp_key(const hfsplus_btree_key *,
	446	const hfsplus_btree_key *);
	447	void hfsplus_cat_build_key(struct super_block *sb,
	448	hfsplus_btree_key , u32, struct qstr );
1da177e4 LT	449	int hfsplus_find_cat(struct super_block , u32, struct hfs_find_data );
	450	int hfsplus_create_cat(u32, struct inode , struct qstr , struct inode *);
	451	int hfsplus_delete_cat(u32, struct inode , struct qstr );
	452	int hfsplus_rename_cat(u32, struct inode , struct qstr ,
	453	struct inode , struct qstr );
90e61690	454	void hfsplus_cat_set_perms(struct inode inode, struct hfsplus_perm perms);
1da177e4	455
4b0a8da7 AB	456	/* dir.c */
	457	extern const struct inode_operations hfsplus_dir_inode_operations;
	458	extern const struct file_operations hfsplus_dir_operations;
	459
1da177e4	460	/* extents.c */
2179d372	461	int hfsplus_ext_cmp_key(const hfsplus_btree_key , const hfsplus_btree_key );
dd7f3d54	462	int hfsplus_ext_write_extent(struct inode *);
1da177e4	463	int hfsplus_get_block(struct inode , sector_t, struct buffer_head , int);
2753cc28 AS	464	int hfsplus_free_fork(struct super_block *, u32,
2753cc28 AS	465	struct hfsplus_fork_raw *, int);
1da177e4 LT	466	int hfsplus_file_extend(struct inode *);
	467	void hfsplus_file_truncate(struct inode *);
	468
	469	/* inode.c */
f5e54d6e CH	470	extern const struct address_space_operations hfsplus_aops;
f5e54d6e CH	471	extern const struct address_space_operations hfsplus_btree_aops;
e16404ed	472	extern const struct dentry_operations hfsplus_dentry_operations;
1da177e4 LT	473
	474	void hfsplus_inode_read_fork(struct inode , struct hfsplus_fork_raw );
	475	void hfsplus_inode_write_fork(struct inode , struct hfsplus_fork_raw );
	476	int hfsplus_cat_read_inode(struct inode , struct hfs_find_data );
	477	int hfsplus_cat_write_inode(struct inode *);
c47da798	478	struct inode hfsplus_new_inode(struct super_block , umode_t);
1da177e4	479	void hfsplus_delete_inode(struct inode *);
02c24a82 JB	480	int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
02c24a82 JB	481	int datasync);
1da177e4 LT	482
1da177e4 LT	483	/* ioctl.c */
7cc4bcc6	484	long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
1da177e4 LT	485
1da177e4 LT	486	/* options.c */
717dd80e	487	int hfsplus_parse_options(char , struct hfsplus_sb_info );
6f80dfe5	488	int hfsplus_parse_options_remount(char input, int force);
717dd80e	489	void hfsplus_fill_defaults(struct hfsplus_sb_info *);
34c80b1d	490	int hfsplus_show_options(struct seq_file , struct dentry );
1da177e4	491
63525391 DH	492	/* super.c */
63525391 DH	493	struct inode hfsplus_iget(struct super_block , unsigned long);
9e6c5829	494	void hfsplus_mark_mdb_dirty(struct super_block *sb);
63525391	495
1da177e4 LT	496	/* tables.c */
	497	extern u16 hfsplus_case_fold_table[];
	498	extern u16 hfsplus_decompose_table[];
	499	extern u16 hfsplus_compose_table[];
	500
	501	/* unicode.c */
2753cc28 AS	502	int hfsplus_strcasecmp(const struct hfsplus_unistr *,
	503	const struct hfsplus_unistr *);
	504	int hfsplus_strcmp(const struct hfsplus_unistr *,
	505	const struct hfsplus_unistr *);
	506	int hfsplus_uni2asc(struct super_block *,
	507	const struct hfsplus_unistr , char , int *);
	508	int hfsplus_asc2uni(struct super_block *,
324ef39a	509	struct hfsplus_unistr , int, const char , int);
da53be12 LT	510	int hfsplus_hash_dentry(const struct dentry dentry, struct qstr str);
da53be12 LT	511	int hfsplus_compare_dentry(const struct dentry parent, const struct dentry dentry,
621e155a	512	unsigned int len, const char str, const struct qstr name);
1da177e4 LT	513
	514	/* wrapper.c */
	515	int hfsplus_read_wrapper(struct super_block *);
1da177e4	516	int hfs_part_find(struct super_block , sector_t , sector_t *);
6596528e SF	517	int hfsplus_submit_bio(struct super_block *sb, sector_t sector,
6596528e SF	518	void buf, void *data, int rw);
1da177e4 LT	519
	520	/* time macros */
	521	#define __hfsp_mt2ut(t) (be32_to_cpu(t) - 2082844800U)
	522	#define __hfsp_ut2mt(t) (cpu_to_be32(t + 2082844800U))
	523
	524	/* compatibility */
	525	#define hfsp_mt2ut(t) (struct timespec){ .tv_sec = __hfsp_mt2ut(t) }
	526	#define hfsp_ut2mt(t) __hfsp_ut2mt((t).tv_sec)
	527	#define hfsp_now2mt() __hfsp_ut2mt(get_seconds())
	528
1da177e4	529	#endif