[linux.git] / fs / hfs / hfs_fs.h

/*
 *  linux/fs/hfs/hfs_fs.h
 *
 * Copyright (C) 1995-1997  Paul H. Hargrove
 * (C) 2003 Ardis Technologies <[email protected]>
 * This file may be distributed under the terms of the GNU General Public License.
 */

#ifndef _LINUX_HFS_FS_H
#define _LINUX_HFS_FS_H

#include <linux/slab.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/buffer_head.h>
#include <linux/fs.h>

#include <asm/byteorder.h>
#include <asm/uaccess.h>

#include "hfs.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_MASK	(DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD|DBG_CAT_MOD|DBG_BITMAP)
//#define DBG_MASK	(DBG_BNODE_MOD|DBG_CAT_MOD|DBG_INODE)
//#define DBG_MASK	(DBG_CAT_MOD|DBG_BNODE_REFS|DBG_INODE|DBG_EXTENT)
#define DBG_MASK	(0)

#define dprint(flg, fmt, args...) \
	if (flg & DBG_MASK) printk(fmt , ## args)

/*
 * struct hfs_inode_info
 *
 * The HFS-specific part of a Linux (struct inode)
 */
struct hfs_inode_info {
	atomic_t opencnt;

	unsigned int flags;

	/* to deal with localtime ugliness */
	int tz_secondswest;

	struct hfs_cat_key cat_key;

	struct list_head open_dir_list;
	struct inode *rsrc_inode;

	struct mutex extents_lock;

	u16 alloc_blocks, clump_blocks;
	sector_t fs_blocks;
	/* Allocation extents from catlog record or volume header */
	hfs_extent_rec first_extents;
	u16 first_blocks;
	hfs_extent_rec cached_extents;
	u16 cached_start, cached_blocks;

	loff_t phys_size;
	struct inode vfs_inode;
};

#define HFS_FLG_RSRC		0x0001
#define HFS_FLG_EXT_DIRTY	0x0002
#define HFS_FLG_EXT_NEW		0x0004

#define HFS_IS_RSRC(inode)	(HFS_I(inode)->flags & HFS_FLG_RSRC)

/*
 * struct hfs_sb_info
 *
 * The HFS-specific part of a Linux (struct super_block)
 */
struct hfs_sb_info {
	struct buffer_head *mdb_bh;		/* The hfs_buffer
						   holding the real
						   superblock (aka VIB
						   or MDB) */
	struct hfs_mdb *mdb;
	struct buffer_head *alt_mdb_bh;		/* The hfs_buffer holding
						   the alternate superblock */
	struct hfs_mdb *alt_mdb;
	__be32 *bitmap;				/* The page holding the
						   allocation bitmap */
	struct hfs_btree *ext_tree;			/* Information about
						   the extents b-tree */
	struct hfs_btree *cat_tree;			/* Information about
						   the catalog b-tree */
	u32 file_count;				/* The number of
						   regular files in
						   the filesystem */
	u32 folder_count;			/* The number of
						   directories in the
						   filesystem */
	u32 next_id;				/* The next available
						   file id number */
	u32 clumpablks;				/* The number of allocation
						   blocks to try to add when
						   extending a file */
	u32 fs_start;				/* The first 512-byte
						   block represented
						   in the bitmap */
	u32 part_start;
	u16 root_files;				/* The number of
						   regular
						   (non-directory)
						   files in the root
						   directory */
	u16 root_dirs;				/* The number of
						   directories in the
						   root directory */
	u16 fs_ablocks;				/* The number of
						   allocation blocks
						   in the filesystem */
	u16 free_ablocks;			/* the number of unused
						   allocation blocks
						   in the filesystem */
	u32 alloc_blksz;			/* The size of an
						   "allocation block" */
	int s_quiet;				/* Silent failure when
						   changing owner or mode? */
	__be32 s_type;				/* Type for new files */
	__be32 s_creator;			/* Creator for new files */
	umode_t s_file_umask;			/* The umask applied to the
						   permissions on all files */
	umode_t s_dir_umask;			/* The umask applied to the
						   permissions on all dirs */
	uid_t s_uid;				/* The uid of all files */
	gid_t s_gid;				/* The gid of all files */

	int session, part;

	struct nls_table *nls_io, *nls_disk;

	struct mutex bitmap_lock;

	unsigned long flags;

	u16 blockoffset;

	int fs_div;

	struct hlist_head rsrc_inodes;
};

#define HFS_FLG_BITMAP_DIRTY	0
#define HFS_FLG_MDB_DIRTY	1
#define HFS_FLG_ALT_MDB_DIRTY	2

/* bitmap.c */
extern u32 hfs_vbm_search_free(struct super_block *, u32, u32 *);
extern int hfs_clear_vbm_bits(struct super_block *, u16, u16);

/* catalog.c */
extern int hfs_cat_keycmp(const btree_key *, const btree_key *);
struct hfs_find_data;
extern int hfs_cat_find_brec(struct super_block *, u32, struct hfs_find_data *);
extern int hfs_cat_create(u32, struct inode *, struct qstr *, struct inode *);
extern int hfs_cat_delete(u32, struct inode *, struct qstr *);
extern int hfs_cat_move(u32, struct inode *, struct qstr *,
			struct inode *, struct qstr *);
extern void hfs_cat_build_key(struct super_block *, btree_key *, u32, struct qstr *);

/* dir.c */
extern const struct file_operations hfs_dir_operations;
extern const struct inode_operations hfs_dir_inode_operations;

/* extent.c */
extern int hfs_ext_keycmp(const btree_key *, const btree_key *);
extern int hfs_free_fork(struct super_block *, struct hfs_cat_file *, int);
extern void hfs_ext_write_extent(struct inode *);
extern int hfs_extend_file(struct inode *);
extern void hfs_file_truncate(struct inode *);

extern int hfs_get_block(struct inode *, sector_t, struct buffer_head *, int);

/* inode.c */
extern const struct address_space_operations hfs_aops;
extern const struct address_space_operations hfs_btree_aops;

extern struct inode *hfs_new_inode(struct inode *, struct qstr *, int);
extern void hfs_inode_write_fork(struct inode *, struct hfs_extent *, __be32 *, __be32 *);
extern int hfs_write_inode(struct inode *, struct writeback_control *);
extern int hfs_inode_setattr(struct dentry *, struct iattr *);
extern void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
			__be32 log_size, __be32 phys_size, u32 clump_size);
extern struct inode *hfs_iget(struct super_block *, struct hfs_cat_key *, hfs_cat_rec *);
extern void hfs_evict_inode(struct inode *);
extern void hfs_delete_inode(struct inode *);

/* attr.c */
extern int hfs_setxattr(struct dentry *dentry, const char *name,
			const void *value, size_t size, int flags);
extern ssize_t hfs_getxattr(struct dentry *dentry, const char *name,
			    void *value, size_t size);
extern ssize_t hfs_listxattr(struct dentry *dentry, char *buffer, size_t size);

/* mdb.c */
extern int hfs_mdb_get(struct super_block *);
extern void hfs_mdb_commit(struct super_block *);
extern void hfs_mdb_close(struct super_block *);
extern void hfs_mdb_put(struct super_block *);

/* part_tbl.c */
extern int hfs_part_find(struct super_block *, sector_t *, sector_t *);

/* string.c */
extern const struct dentry_operations hfs_dentry_operations;

extern int hfs_hash_dentry(struct dentry *, struct qstr *);
extern int hfs_strcmp(const unsigned char *, unsigned int,
		      const unsigned char *, unsigned int);
extern int hfs_compare_dentry(struct dentry *, struct qstr *, struct qstr *);

/* trans.c */
extern void hfs_asc2mac(struct super_block *, struct hfs_name *, struct qstr *);
extern int hfs_mac2asc(struct super_block *, char *, const struct hfs_name *);

extern struct timezone sys_tz;

/*
 * There are two time systems.  Both are based on seconds since
 * a particular time/date.
 *	Unix:	unsigned lil-endian since 00:00 GMT, Jan. 1, 1970
 *	mac:	unsigned big-endian since 00:00 GMT, Jan. 1, 1904
 *
 */
#define __hfs_u_to_mtime(sec)	cpu_to_be32(sec + 2082844800U - sys_tz.tz_minuteswest * 60)
#define __hfs_m_to_utime(sec)	(be32_to_cpu(sec) - 2082844800U  + sys_tz.tz_minuteswest * 60)

#define HFS_I(inode)	(list_entry(inode, struct hfs_inode_info, vfs_inode))
#define HFS_SB(sb)	((struct hfs_sb_info *)(sb)->s_fs_info)

#define hfs_m_to_utime(time)	(struct timespec){ .tv_sec = __hfs_m_to_utime(time) }
#define hfs_u_to_mtime(time)	__hfs_u_to_mtime((time).tv_sec)
#define hfs_mtime()		__hfs_u_to_mtime(get_seconds())

static inline const char *hfs_mdb_name(struct super_block *sb)
{
	return sb->s_id;
}

static inline void hfs_bitmap_dirty(struct super_block *sb)
{
	set_bit(HFS_FLG_BITMAP_DIRTY, &HFS_SB(sb)->flags);
	sb->s_dirt = 1;
}

static inline void hfs_buffer_sync(struct buffer_head *bh)
{
	while (buffer_locked(bh)) {
		wait_on_buffer(bh);
	}
	if (buffer_dirty(bh)) {
		ll_rw_block(WRITE, 1, &bh);
		wait_on_buffer(bh);
	}
}

#define sb_bread512(sb, sec, data) ({			\
	struct buffer_head *__bh;			\
	sector_t __block;				\
	loff_t __start;					\
	int __offset;					\
							\
	__start = (loff_t)(sec) << HFS_SECTOR_SIZE_BITS;\
	__block = __start >> (sb)->s_blocksize_bits;	\
	__offset = __start & ((sb)->s_blocksize - 1);	\
	__bh = sb_bread((sb), __block);			\
	if (likely(__bh != NULL))			\
		data = (void *)(__bh->b_data + __offset);\
	else						\
		data = NULL;				\
	__bh;						\
})

#endif
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/hfs/hfs_fs.h
	3	*
	4	* Copyright (C) 1995-1997 Paul H. Hargrove
	5	* (C) 2003 Ardis Technologies <[email protected]>
	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
1da177e4 LT	12	#include <linux/slab.h>
1da177e4 LT	13	#include <linux/types.h>
3084b72d	14	#include <linux/mutex.h>
1da177e4 LT	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
1da177e4 LT	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
39f8d472	57	struct mutex extents_lock;
1da177e4 LT	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
328b9227 RZ	141	struct nls_table nls_io, nls_disk;
328b9227 RZ	142
3084b72d	143	struct mutex bitmap_lock;
1da177e4 LT	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 );
328b9227	170	extern void hfs_cat_build_key(struct super_block , btree_key , u32, struct qstr *);
1da177e4 LT	171
1da177e4 LT	172	/* dir.c */
4b6f5d20	173	extern const struct file_operations hfs_dir_operations;
92e1d5be	174	extern const struct inode_operations hfs_dir_inode_operations;
1da177e4 LT	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 */
f5e54d6e CH	186	extern const struct address_space_operations hfs_aops;
f5e54d6e CH	187	extern const struct address_space_operations hfs_btree_aops;
1da177e4 LT	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 );
a9185b41	191	extern int hfs_write_inode(struct inode , struct writeback_control );
1da177e4 LT	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 );
b57922d9	196	extern void hfs_evict_inode(struct inode *);
1da177e4 LT	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 */
e16404ed	216	extern const struct dentry_operations hfs_dentry_operations;
1da177e4 LT	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 */
328b9227 RZ	224	extern void hfs_asc2mac(struct super_block , struct hfs_name , struct qstr *);
328b9227 RZ	225	extern int hfs_mac2asc(struct super_block , char , const struct hfs_name *);
1da177e4 LT	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