[linux.git] / fs / hpfs / hpfs_fn.h

/*
 *  linux/fs/hpfs/hpfs_fn.h
 *
 *  Mikulas Patocka ([email protected]), 1998-1999
 *
 *  function headers
 */

//#define DBG
//#define DEBUG_LOCKS

#include <linux/pagemap.h>
#include <linux/buffer_head.h>
#include <linux/hpfs_fs.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>

#include "hpfs.h"

#define EIOERROR  EIO
#define EFSERROR  EPERM
#define EMEMERROR ENOMEM

#define ANODE_ALLOC_FWD	512
#define FNODE_ALLOC_FWD	0
#define ALLOC_FWD_MIN	16
#define ALLOC_FWD_MAX	128
#define ALLOC_M		1
#define FNODE_RD_AHEAD	16
#define ANODE_RD_AHEAD	16
#define DNODE_RD_AHEAD	4

#define FREE_DNODES_ADD	58
#define FREE_DNODES_DEL	29

#define CHKCOND(x,y) if (!(x)) printk y

#ifdef DBG
#define PRINTK(x) printk x
#else
#undef PRINTK
#define PRINTK(x)
#endif

struct hpfs_inode_info {
	loff_t mmu_private;
	ino_t i_parent_dir;	/* (directories) gives fnode of parent dir */
	unsigned i_dno;		/* (directories) root dnode */
	unsigned i_dpos;	/* (directories) temp for readdir */
	unsigned i_dsubdno;	/* (directories) temp for readdir */
	unsigned i_file_sec;	/* (files) minimalist cache of alloc info */
	unsigned i_disk_sec;	/* (files) minimalist cache of alloc info */
	unsigned i_n_secs;	/* (files) minimalist cache of alloc info */
	unsigned i_ea_size;	/* size of extended attributes */
	unsigned i_conv : 2;	/* (files) crlf->newline hackery */
	unsigned i_ea_mode : 1;	/* file's permission is stored in ea */
	unsigned i_ea_uid : 1;	/* file's uid is stored in ea */
	unsigned i_ea_gid : 1;	/* file's gid is stored in ea */
	unsigned i_dirty : 1;
	struct semaphore i_sem;
	struct semaphore i_parent;
	loff_t **i_rddir_off;
	struct inode vfs_inode;
};

struct hpfs_sb_info {
	ino_t sb_root;			/* inode number of root dir */
	unsigned sb_fs_size;		/* file system size, sectors */
	unsigned sb_bitmaps;		/* sector number of bitmap list */
	unsigned sb_dirband_start;	/* directory band start sector */
	unsigned sb_dirband_size;	/* directory band size, dnodes */
	unsigned sb_dmap;		/* sector number of dnode bit map */
	unsigned sb_n_free;		/* free blocks for statfs, or -1 */
	unsigned sb_n_free_dnodes;	/* free dnodes for statfs, or -1 */
	uid_t sb_uid;			/* uid from mount options */
	gid_t sb_gid;			/* gid from mount options */
	umode_t sb_mode;		/* mode from mount options */
	unsigned sb_conv : 2;		/* crlf->newline hackery */
	unsigned sb_eas : 2;		/* eas: 0-ignore, 1-ro, 2-rw */
	unsigned sb_err : 2;		/* on errs: 0-cont, 1-ro, 2-panic */
	unsigned sb_chk : 2;		/* checks: 0-no, 1-normal, 2-strict */
	unsigned sb_lowercase : 1;	/* downcase filenames hackery */
	unsigned sb_was_error : 1;	/* there was an error, set dirty flag */
	unsigned sb_chkdsk : 2;		/* chkdsk: 0-no, 1-on errs, 2-allways */
	unsigned char *sb_cp_table;	/* code page tables: */
					/* 	128 bytes uppercasing table & */
					/*	128 bytes lowercasing table */
	unsigned *sb_bmp_dir;		/* main bitmap directory */
	unsigned sb_c_bitmap;		/* current bitmap */
	unsigned sb_max_fwd_alloc;	/* max forwad allocation */
	struct semaphore hpfs_creation_de; /* when creating dirents, nobody else
					   can alloc blocks */
	/*unsigned sb_mounting : 1;*/
	int sb_timeshift;
};

/*
 * conv= options
 */

#define CONV_BINARY 0			/* no conversion */
#define CONV_TEXT 1			/* crlf->newline */
#define CONV_AUTO 2			/* decide based on file contents */

/* Four 512-byte buffers and the 2k block obtained by concatenating them */

struct quad_buffer_head {
	struct buffer_head *bh[4];
	void *data;
};

/* The b-tree down pointer from a dir entry */

static inline dnode_secno de_down_pointer (struct hpfs_dirent *de)
{
  CHKCOND(de->down,("HPFS: de_down_pointer: !de->down\n"));
  return *(dnode_secno *) ((void *) de + de->length - 4);
}

/* The first dir entry in a dnode */

static inline struct hpfs_dirent *dnode_first_de (struct dnode *dnode)
{
  return (void *) dnode->dirent;
}

/* The end+1 of the dir entries */

static inline struct hpfs_dirent *dnode_end_de (struct dnode *dnode)
{
  CHKCOND(dnode->first_free>=0x14 && dnode->first_free<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %d\n",(int)dnode->first_free));
  return (void *) dnode + dnode->first_free;
}

/* The dir entry after dir entry de */

static inline struct hpfs_dirent *de_next_de (struct hpfs_dirent *de)
{
  CHKCOND(de->length>=0x20 && de->length<0x800,("HPFS: de_next_de: de->length = %d\n",(int)de->length));
  return (void *) de + de->length;
}

static inline struct extended_attribute *fnode_ea(struct fnode *fnode)
{
	return (struct extended_attribute *)((char *)fnode + fnode->ea_offs + fnode->acl_size_s);
}

static inline struct extended_attribute *fnode_end_ea(struct fnode *fnode)
{
	return (struct extended_attribute *)((char *)fnode + fnode->ea_offs + fnode->acl_size_s + fnode->ea_size_s);
}

static inline struct extended_attribute *next_ea(struct extended_attribute *ea)
{
	return (struct extended_attribute *)((char *)ea + 5 + ea->namelen + ea->valuelen);
}

static inline secno ea_sec(struct extended_attribute *ea)
{
	return *(secno *)((char *)ea + 9 + ea->namelen);
}

static inline secno ea_len(struct extended_attribute *ea)
{
	return *(secno *)((char *)ea + 5 + ea->namelen);
}

static inline char *ea_data(struct extended_attribute *ea)
{
	return (char *)((char *)ea + 5 + ea->namelen);
}

static inline unsigned de_size(int namelen, secno down_ptr)
{
	return ((0x1f + namelen + 3) & ~3) + (down_ptr ? 4 : 0);
}

static inline void copy_de(struct hpfs_dirent *dst, struct hpfs_dirent *src)
{
	int a;
	int n;
	if (!dst || !src) return;
	a = dst->down;
	n = dst->not_8x3;
	memcpy((char *)dst + 2, (char *)src + 2, 28);
	dst->down = a;
	dst->not_8x3 = n;
}

static inline unsigned tstbits(unsigned *bmp, unsigned b, unsigned n)
{
	int i;
	if ((b >= 0x4000) || (b + n - 1 >= 0x4000)) return n;
	if (!((bmp[(b & 0x3fff) >> 5] >> (b & 0x1f)) & 1)) return 1;
	for (i = 1; i < n; i++)
		if (/*b+i < 0x4000 &&*/ !((bmp[((b+i) & 0x3fff) >> 5] >> ((b+i) & 0x1f)) & 1))
			return i + 1;
	return 0;
}

/* alloc.c */

int hpfs_chk_sectors(struct super_block *, secno, int, char *);
secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int, int);
int hpfs_alloc_if_possible(struct super_block *, secno);
void hpfs_free_sectors(struct super_block *, secno, unsigned);
int hpfs_check_free_dnodes(struct super_block *, int);
void hpfs_free_dnode(struct super_block *, secno);
struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *, int);
struct fnode *hpfs_alloc_fnode(struct super_block *, secno, fnode_secno *, struct buffer_head **);
struct anode *hpfs_alloc_anode(struct super_block *, secno, anode_secno *, struct buffer_head **);

/* anode.c */

secno hpfs_bplus_lookup(struct super_block *, struct inode *, struct bplus_header *, unsigned, struct buffer_head *);
secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned);
void hpfs_remove_btree(struct super_block *, struct bplus_header *);
int hpfs_ea_read(struct super_block *, secno, int, unsigned, unsigned, char *);
int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, char *);
void hpfs_ea_remove(struct super_block *, secno, int, unsigned);
void hpfs_truncate_btree(struct super_block *, secno, int, unsigned);
void hpfs_remove_fnode(struct super_block *, fnode_secno fno);

/* buffer.c */

void hpfs_lock_creation(struct super_block *);
void hpfs_unlock_creation(struct super_block *);
void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int);
void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **);
void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int);
void *hpfs_get_4sectors(struct super_block *, unsigned, struct quad_buffer_head *);
void hpfs_brelse4(struct quad_buffer_head *);
void hpfs_mark_4buffers_dirty(struct quad_buffer_head *);

/* dentry.c */

void hpfs_set_dentry_operations(struct dentry *);

/* dir.c */

struct dentry *hpfs_lookup(struct inode *, struct dentry *, struct nameidata *);
extern struct file_operations hpfs_dir_ops;

/* dnode.c */

void hpfs_add_pos(struct inode *, loff_t *);
void hpfs_del_pos(struct inode *, loff_t *);
struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *, unsigned char *, unsigned, secno);
int hpfs_add_dirent(struct inode *, unsigned char *, unsigned, struct hpfs_dirent *, int);
int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int);
void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *);
dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno);
struct hpfs_dirent *map_pos_dirent(struct inode *, loff_t *, struct quad_buffer_head *);
struct hpfs_dirent *map_dirent(struct inode *, dnode_secno, char *, unsigned, dnode_secno *, struct quad_buffer_head *);
void hpfs_remove_dtree(struct super_block *, dnode_secno);
struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct fnode *, struct quad_buffer_head *);

/* ea.c */

void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned);
int hpfs_read_ea(struct super_block *, struct fnode *, char *, char *, int);
char *hpfs_get_ea(struct super_block *, struct fnode *, char *, int *);
void hpfs_set_ea(struct inode *, struct fnode *, char *, char *, int);

/* file.c */

int hpfs_file_fsync(struct file *, struct dentry *, int);
extern struct file_operations hpfs_file_ops;
extern struct inode_operations hpfs_file_iops;
extern struct address_space_operations hpfs_aops;

/* inode.c */

void hpfs_init_inode(struct inode *);
void hpfs_read_inode(struct inode *);
void hpfs_write_inode(struct inode *);
void hpfs_write_inode_nolock(struct inode *);
int hpfs_notify_change(struct dentry *, struct iattr *);
void hpfs_write_if_changed(struct inode *);
void hpfs_delete_inode(struct inode *);

/* map.c */

unsigned *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *);
unsigned *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *);
char *hpfs_load_code_page(struct super_block *, secno);
secno *hpfs_load_bitmap_directory(struct super_block *, secno bmp);
struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **);
struct anode *hpfs_map_anode(struct super_block *s, anode_secno, struct buffer_head **);
struct dnode *hpfs_map_dnode(struct super_block *s, dnode_secno, struct quad_buffer_head *);
dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino);

/* name.c */

unsigned char hpfs_upcase(unsigned char *, unsigned char);
int hpfs_chk_name(unsigned char *, unsigned *);
char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int);
int hpfs_compare_names(struct super_block *, unsigned char *, unsigned, unsigned char *, unsigned, int);
int hpfs_is_name_long(unsigned char *, unsigned);
void hpfs_adjust_length(unsigned char *, unsigned *);
void hpfs_decide_conv(struct inode *, unsigned char *, unsigned);

/* namei.c */

extern struct inode_operations hpfs_dir_iops;
extern struct address_space_operations hpfs_symlink_aops;

static inline struct hpfs_inode_info *hpfs_i(struct inode *inode)
{
	return list_entry(inode, struct hpfs_inode_info, vfs_inode);
}

static inline struct hpfs_sb_info *hpfs_sb(struct super_block *sb)
{
	return sb->s_fs_info;
}

/* super.c */

void hpfs_error(struct super_block *, char *, ...);
int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *);
unsigned hpfs_count_one_bitmap(struct super_block *, secno);

/*
 * local time (HPFS) to GMT (Unix)
 */

static inline time_t local_to_gmt(struct super_block *s, time32_t t)
{
	extern struct timezone sys_tz;
	return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift;
}

static inline time32_t gmt_to_local(struct super_block *s, time_t t)
{
	extern struct timezone sys_tz;
	return t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/hpfs/hpfs_fn.h
	3	*
	4	* Mikulas Patocka ([email protected]), 1998-1999
	5	*
	6	* function headers
	7	*/
	8
	9	//#define DBG
	10	//#define DEBUG_LOCKS
	11
	12	#include <linux/pagemap.h>
	13	#include <linux/buffer_head.h>
	14	#include <linux/hpfs_fs.h>
	15	#include <linux/slab.h>
	16	#include <linux/smp_lock.h>
	17
	18	#include "hpfs.h"
	19
	20	#define EIOERROR EIO
	21	#define EFSERROR EPERM
	22	#define EMEMERROR ENOMEM
	23
	24	#define ANODE_ALLOC_FWD 512
	25	#define FNODE_ALLOC_FWD 0
	26	#define ALLOC_FWD_MIN 16
	27	#define ALLOC_FWD_MAX 128
	28	#define ALLOC_M 1
	29	#define FNODE_RD_AHEAD 16
	30	#define ANODE_RD_AHEAD 16
	31	#define DNODE_RD_AHEAD 4
	32
	33	#define FREE_DNODES_ADD 58
	34	#define FREE_DNODES_DEL 29
	35
	36	#define CHKCOND(x,y) if (!(x)) printk y
	37
	38	#ifdef DBG
	39	#define PRINTK(x) printk x
	40	#else
	41	#undef PRINTK
	42	#define PRINTK(x)
	43	#endif
	44
	45	struct hpfs_inode_info {
	46	loff_t mmu_private;
	47	ino_t i_parent_dir; /* (directories) gives fnode of parent dir */
	48	unsigned i_dno; /* (directories) root dnode */
	49	unsigned i_dpos; /* (directories) temp for readdir */
	50	unsigned i_dsubdno; /* (directories) temp for readdir */
	51	unsigned i_file_sec; /* (files) minimalist cache of alloc info */
	52	unsigned i_disk_sec; /* (files) minimalist cache of alloc info */
	53	unsigned i_n_secs; /* (files) minimalist cache of alloc info */
	54	unsigned i_ea_size; /* size of extended attributes */
	55	unsigned i_conv : 2; /* (files) crlf->newline hackery */
	56	unsigned i_ea_mode : 1; /* file's permission is stored in ea */
	57	unsigned i_ea_uid : 1; /* file's uid is stored in ea */
	58	unsigned i_ea_gid : 1; /* file's gid is stored in ea */
	59	unsigned i_dirty : 1;
	60	struct semaphore i_sem;
	61	struct semaphore i_parent;
	62	loff_t **i_rddir_off;
	63	struct inode vfs_inode;
	64	};
65
66	struct hpfs_sb_info {
67	ino_t sb_root; /* inode number of root dir */
68	unsigned sb_fs_size; /* file system size, sectors */
69	unsigned sb_bitmaps; /* sector number of bitmap list */
70	unsigned sb_dirband_start; /* directory band start sector */
71	unsigned sb_dirband_size; /* directory band size, dnodes */
72	unsigned sb_dmap; /* sector number of dnode bit map */
73	unsigned sb_n_free; /* free blocks for statfs, or -1 */
74	unsigned sb_n_free_dnodes; /* free dnodes for statfs, or -1 */
75	uid_t sb_uid; /* uid from mount options */
76	gid_t sb_gid; /* gid from mount options */
77	umode_t sb_mode; /* mode from mount options */
78	unsigned sb_conv : 2; /* crlf->newline hackery */
79	unsigned sb_eas : 2; /* eas: 0-ignore, 1-ro, 2-rw */
80	unsigned sb_err : 2; /* on errs: 0-cont, 1-ro, 2-panic */
81	unsigned sb_chk : 2; /* checks: 0-no, 1-normal, 2-strict */
82	unsigned sb_lowercase : 1; /* downcase filenames hackery */
83	unsigned sb_was_error : 1; /* there was an error, set dirty flag */
84	unsigned sb_chkdsk : 2; /* chkdsk: 0-no, 1-on errs, 2-allways */
85	unsigned char sb_cp_table; / code page tables: */
86	/* 128 bytes uppercasing table & */
87	/* 128 bytes lowercasing table */
88	unsigned sb_bmp_dir; / main bitmap directory */
89	unsigned sb_c_bitmap; /* current bitmap */
90	unsigned sb_max_fwd_alloc; /* max forwad allocation */
91	struct semaphore hpfs_creation_de; /* when creating dirents, nobody else
92	can alloc blocks */
93	/unsigned sb_mounting : 1;/
94	int sb_timeshift;
95	};
96
97	/*
98	* conv= options
99	*/
100
101	#define CONV_BINARY 0 /* no conversion */
102	#define CONV_TEXT 1 /* crlf->newline */
103	#define CONV_AUTO 2 /* decide based on file contents */
104
105	/* Four 512-byte buffers and the 2k block obtained by concatenating them */
106
107	struct quad_buffer_head {
108	struct buffer_head *bh[4];
109	void *data;
110	};
111
112	/* The b-tree down pointer from a dir entry */
113
114	static inline dnode_secno de_down_pointer (struct hpfs_dirent *de)
115	{
116	CHKCOND(de->down,("HPFS: de_down_pointer: !de->down\n"));
117	return (dnode_secno ) ((void *) de + de->length - 4);
118	}
119
120	/* The first dir entry in a dnode */
121
122	static inline struct hpfs_dirent dnode_first_de (struct dnode dnode)
123	{
124	return (void *) dnode->dirent;
125	}
126
127	/* The end+1 of the dir entries */
128
129	static inline struct hpfs_dirent dnode_end_de (struct dnode dnode)
130	{
131	CHKCOND(dnode->first_free>=0x14 && dnode->first_free<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %d\n",(int)dnode->first_free));
132	return (void *) dnode + dnode->first_free;
133	}
134
135	/* The dir entry after dir entry de */
136
137	static inline struct hpfs_dirent de_next_de (struct hpfs_dirent de)
138	{
139	CHKCOND(de->length>=0x20 && de->length<0x800,("HPFS: de_next_de: de->length = %d\n",(int)de->length));
140	return (void *) de + de->length;
141	}
142
143	static inline struct extended_attribute fnode_ea(struct fnode fnode)
144	{
145	return (struct extended_attribute )((char )fnode + fnode->ea_offs + fnode->acl_size_s);
146	}
147
148	static inline struct extended_attribute fnode_end_ea(struct fnode fnode)
149	{
150	return (struct extended_attribute )((char )fnode + fnode->ea_offs + fnode->acl_size_s + fnode->ea_size_s);
151	}
152
153	static inline struct extended_attribute next_ea(struct extended_attribute ea)
154	{
155	return (struct extended_attribute )((char )ea + 5 + ea->namelen + ea->valuelen);
156	}
157
158	static inline secno ea_sec(struct extended_attribute *ea)
159	{
160	return (secno )((char *)ea + 9 + ea->namelen);
161	}
162
163	static inline secno ea_len(struct extended_attribute *ea)
164	{
165	return (secno )((char *)ea + 5 + ea->namelen);
166	}
167
168	static inline char ea_data(struct extended_attribute ea)
169	{
170	return (char )((char )ea + 5 + ea->namelen);
171	}
172
173	static inline unsigned de_size(int namelen, secno down_ptr)
174	{
175	return ((0x1f + namelen + 3) & ~3) + (down_ptr ? 4 : 0);
176	}
177
178	static inline void copy_de(struct hpfs_dirent dst, struct hpfs_dirent src)
179	{
180	int a;
181	int n;
182	if (!dst \|\| !src) return;
183	a = dst->down;
184	n = dst->not_8x3;
185	memcpy((char )dst + 2, (char )src + 2, 28);
186	dst->down = a;
187	dst->not_8x3 = n;
188	}
189
190	static inline unsigned tstbits(unsigned *bmp, unsigned b, unsigned n)
191	{
192	int i;
193	if ((b >= 0x4000) \|\| (b + n - 1 >= 0x4000)) return n;
194	if (!((bmp[(b & 0x3fff) >> 5] >> (b & 0x1f)) & 1)) return 1;
195	for (i = 1; i < n; i++)
196	if (/b+i < 0x4000 &&/ !((bmp[((b+i) & 0x3fff) >> 5] >> ((b+i) & 0x1f)) & 1))
197	return i + 1;
198	return 0;
199	}
200
201	/* alloc.c */
202
203	int hpfs_chk_sectors(struct super_block , secno, int, char );
204	secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int, int);
205	int hpfs_alloc_if_possible(struct super_block *, secno);
206	void hpfs_free_sectors(struct super_block *, secno, unsigned);
207	int hpfs_check_free_dnodes(struct super_block *, int);
208	void hpfs_free_dnode(struct super_block *, secno);
209	struct dnode hpfs_alloc_dnode(struct super_block , secno, dnode_secno , struct quad_buffer_head , int);
210	struct fnode hpfs_alloc_fnode(struct super_block , secno, fnode_secno , struct buffer_head *);
211	struct anode hpfs_alloc_anode(struct super_block , secno, anode_secno , struct buffer_head *);
212
213	/* anode.c */
214
215	secno hpfs_bplus_lookup(struct super_block , struct inode , struct bplus_header , unsigned, struct buffer_head );
216	secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned);
217	void hpfs_remove_btree(struct super_block , struct bplus_header );
218	int hpfs_ea_read(struct super_block , secno, int, unsigned, unsigned, char );
219	int hpfs_ea_write(struct super_block , secno, int, unsigned, unsigned, char );
220	void hpfs_ea_remove(struct super_block *, secno, int, unsigned);
221	void hpfs_truncate_btree(struct super_block *, secno, int, unsigned);
222	void hpfs_remove_fnode(struct super_block *, fnode_secno fno);
223
224	/* buffer.c */
225
226	void hpfs_lock_creation(struct super_block *);
227	void hpfs_unlock_creation(struct super_block *);
228	void hpfs_map_sector(struct super_block , unsigned, struct buffer_head **, int);
229	void hpfs_get_sector(struct super_block , unsigned, struct buffer_head **);
230	void hpfs_map_4sectors(struct super_block , unsigned, struct quad_buffer_head *, int);
231	void hpfs_get_4sectors(struct super_block , unsigned, struct quad_buffer_head *);
232	void hpfs_brelse4(struct quad_buffer_head *);
233	void hpfs_mark_4buffers_dirty(struct quad_buffer_head *);
234
235	/* dentry.c */
236
237	void hpfs_set_dentry_operations(struct dentry *);
238
239	/* dir.c */
240
241	struct dentry hpfs_lookup(struct inode , struct dentry , struct nameidata );
242	extern struct file_operations hpfs_dir_ops;
243
244	/* dnode.c */
245
246	void hpfs_add_pos(struct inode , loff_t );
247	void hpfs_del_pos(struct inode , loff_t );
248	struct hpfs_dirent hpfs_add_de(struct super_block , struct dnode , unsigned char , unsigned, secno);
249	int hpfs_add_dirent(struct inode , unsigned char , unsigned, struct hpfs_dirent *, int);
250	int hpfs_remove_dirent(struct inode , dnode_secno, struct hpfs_dirent , struct quad_buffer_head *, int);
251	void hpfs_count_dnodes(struct super_block , dnode_secno, int , int , int );
252	dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno);
253	struct hpfs_dirent map_pos_dirent(struct inode , loff_t , struct quad_buffer_head );
254	struct hpfs_dirent map_dirent(struct inode , dnode_secno, char , unsigned, dnode_secno , struct quad_buffer_head *);
255	void hpfs_remove_dtree(struct super_block *, dnode_secno);
256	struct hpfs_dirent map_fnode_dirent(struct super_block , fnode_secno, struct fnode , struct quad_buffer_head );
257
258	/* ea.c */
259
260	void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned);
261	int hpfs_read_ea(struct super_block , struct fnode , char , char , int);
262	char hpfs_get_ea(struct super_block , struct fnode , char , int *);
263	void hpfs_set_ea(struct inode , struct fnode , char , char , int);
264
265	/* file.c */
266
267	int hpfs_file_fsync(struct file , struct dentry , int);
268	extern struct file_operations hpfs_file_ops;
269	extern struct inode_operations hpfs_file_iops;
270	extern struct address_space_operations hpfs_aops;
271
272	/* inode.c */
273
274	void hpfs_init_inode(struct inode *);
275	void hpfs_read_inode(struct inode *);
276	void hpfs_write_inode(struct inode *);
277	void hpfs_write_inode_nolock(struct inode *);
278	int hpfs_notify_change(struct dentry , struct iattr );
279	void hpfs_write_if_changed(struct inode *);
280	void hpfs_delete_inode(struct inode *);
281
282	/* map.c */
283
284	unsigned hpfs_map_dnode_bitmap(struct super_block , struct quad_buffer_head *);
285	unsigned hpfs_map_bitmap(struct super_block , unsigned, struct quad_buffer_head , char );
286	char hpfs_load_code_page(struct super_block , secno);
287	secno hpfs_load_bitmap_directory(struct super_block , secno bmp);
288	struct fnode hpfs_map_fnode(struct super_block s, ino_t, struct buffer_head **);
289	struct anode hpfs_map_anode(struct super_block s, anode_secno, struct buffer_head **);
290	struct dnode hpfs_map_dnode(struct super_block s, dnode_secno, struct quad_buffer_head *);
291	dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino);
292
293	/* name.c */
294
295	unsigned char hpfs_upcase(unsigned char *, unsigned char);
296	int hpfs_chk_name(unsigned char , unsigned );
297	char hpfs_translate_name(struct super_block , unsigned char *, unsigned, int, int);
298	int hpfs_compare_names(struct super_block , unsigned char , unsigned, unsigned char *, unsigned, int);
299	int hpfs_is_name_long(unsigned char *, unsigned);
300	void hpfs_adjust_length(unsigned char , unsigned );
301	void hpfs_decide_conv(struct inode , unsigned char , unsigned);
302
303	/* namei.c */
304
305	extern struct inode_operations hpfs_dir_iops;
306	extern struct address_space_operations hpfs_symlink_aops;
307
308	static inline struct hpfs_inode_info hpfs_i(struct inode inode)
309	{
310	return list_entry(inode, struct hpfs_inode_info, vfs_inode);
311	}
312
313	static inline struct hpfs_sb_info hpfs_sb(struct super_block sb)
314	{
315	return sb->s_fs_info;
316	}
317
318	/* super.c */
319
320	void hpfs_error(struct super_block , char , ...);
321	int hpfs_stop_cycles(struct super_block , int, int , int , char );
322	unsigned hpfs_count_one_bitmap(struct super_block *, secno);
323
324	/*
325	* local time (HPFS) to GMT (Unix)
326	*/
327
328	static inline time_t local_to_gmt(struct super_block *s, time32_t t)
329	{
330	extern struct timezone sys_tz;
331	return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift;
332	}
333
334	static inline time32_t gmt_to_local(struct super_block *s, time_t t)
335	{
336	extern struct timezone sys_tz;
337	return t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift;
338	}