Release 4.11 fs/hpfs/hpfs_fn.h

/*
 *  linux/fs/hpfs/hpfs_fn.h
 *
 *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
 *
 *  function headers
 */

//#define DBG
//#define DEBUG_LOCKS
#ifdef pr_fmt

#undef pr_fmt
#endif


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/mutex.h>
#include <linux/pagemap.h>
#include <linux/buffer_head.h>
#include <linux/slab.h>
#include <linux/sched/signal.h>
#include <linux/blkdev.h>
#include <asm/unaligned.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	0

#define DNODE_RD_AHEAD	72

#define COUNT_RD_AHEAD	62


#define FREE_DNODES_ADD	58

#define FREE_DNODES_DEL	29


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


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_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;
	
loff_t **i_rddir_off;
	
struct inode vfs_inode;
};


struct hpfs_sb_info {
	
struct mutex hpfs_mutex;	/* global hpfs lock */
	
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 */
	
kuid_t sb_uid;			/* uid from mount options */
	
kgid_t sb_gid;			/* gid from mount options */
	
umode_t sb_mode;		/* mode from mount options */
	
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 */
	
__le32 *sb_bmp_dir;		/* main bitmap directory */
	
unsigned sb_c_bitmap;		/* current bitmap */
	
unsigned sb_max_fwd_alloc;	/* max forwad allocation */
	
int sb_timeshift;
	
struct rcu_head rcu;

	
unsigned n_hotfixes;
	
secno hotfix_from[256];
	
secno hotfix_to[256];
};

/* 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 le32_to_cpu(*(__le32 *) ((void *) de + le16_to_cpu(de->length) - 4));
}

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41
83.67%
1
25.00%
Mikulas Patocka
6
12.24%
1
25.00%
Al Viro
1
2.04%
1
25.00%
Dave Jones
1
2.04%
1
25.00%
Total
49
100.00%
4
100.00%

/* The first dir entry in a dnode */



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

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Linus Torvalds (pre-git)
22
95.65%
1
50.00%
Dave Jones
1
4.35%
1
50.00%
Total
23
100.00%
2
100.00%

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



static inline struct hpfs_dirent *dnode_end_de (struct dnode *dnode)
{
  CHKCOND(le32_to_cpu(dnode->first_free)>=0x14 && le32_to_cpu(dnode->first_free)<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %x\n",(unsigned)le32_to_cpu(dnode->first_free)));
  return (void *) dnode + le32_to_cpu(dnode->first_free);
}

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Linus Torvalds (pre-git)
48
76.19%
1
33.33%
Mikulas Patocka
14
22.22%
1
33.33%
Dave Jones
1
1.59%
1
33.33%
Total
63
100.00%
3
100.00%

/* The dir entry after dir entry de */



static inline struct hpfs_dirent *de_next_de (struct hpfs_dirent *de)
{
  CHKCOND(le16_to_cpu(de->length)>=0x20 && le16_to_cpu(de->length)<0x800,("HPFS: de_next_de: de->length = %x\n",(unsigned)le16_to_cpu(de->length)));
  return (void *) de + le16_to_cpu(de->length);
}

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Linus Torvalds (pre-git)
48
76.19%
1
33.33%
Mikulas Patocka
14
22.22%
1
33.33%
Dave Jones
1
1.59%
1
33.33%
Total
63
100.00%
3
100.00%



static inline struct extended_attribute *fnode_ea(struct fnode *fnode)
{
	return (struct extended_attribute *)((char *)fnode + le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s));
}

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Linus Torvalds (pre-git)
31
73.81%
1
25.00%
Mikulas Patocka
10
23.81%
2
50.00%
Dave Jones
1
2.38%
1
25.00%
Total
42
100.00%
4
100.00%



static inline struct extended_attribute *fnode_end_ea(struct fnode *fnode)
{
	return (struct extended_attribute *)((char *)fnode + le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s));
}

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Linus Torvalds (pre-git)
35
71.43%
1
25.00%
Mikulas Patocka
13
26.53%
2
50.00%
Dave Jones
1
2.04%
1
25.00%
Total
49
100.00%
4
100.00%



static unsigned ea_valuelen(struct extended_attribute *ea)
{
	return ea->valuelen_lo + 256 * ea->valuelen_hi;
}

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Mikulas Patocka
22
100.00%
1
100.00%
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22
100.00%
1
100.00%



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

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Linus Torvalds (pre-git)
35
89.74%
1
25.00%
Mikulas Patocka
3
7.69%
2
50.00%
Dave Jones
1
2.56%
1
25.00%
Total
39
100.00%
4
100.00%



static inline secno ea_sec(struct extended_attribute *ea)
{
	return le32_to_cpu(get_unaligned((__le32 *)((char *)ea + 9 + ea->namelen)));
}

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Linus Torvalds (pre-git)
28
75.68%
1
20.00%
Mikulas Patocka
7
18.92%
2
40.00%
Dave Jones
1
2.70%
1
20.00%
Al Viro
1
2.70%
1
20.00%
Total
37
100.00%
5
100.00%



static inline secno ea_len(struct extended_attribute *ea)
{
	return le32_to_cpu(get_unaligned((__le32 *)((char *)ea + 5 + ea->namelen)));
}

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Linus Torvalds (pre-git)
28
75.68%
1
20.00%
Mikulas Patocka
7
18.92%
2
40.00%
Al Viro
1
2.70%
1
20.00%
Dave Jones
1
2.70%
1
20.00%
Total
37
100.00%
5
100.00%



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

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31
96.88%
1
50.00%
Dave Jones
1
3.12%
1
50.00%
Total
32
100.00%
2
100.00%



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

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34
97.14%
1
50.00%
Dave Jones
1
2.86%
1
50.00%
Total
35
100.00%
2
100.00%



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;
}

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64
83.12%
1
50.00%
Dave Jones
13
16.88%
1
50.00%
Total
77
100.00%
2
100.00%



static inline unsigned tstbits(__le32 *bmp, unsigned b, unsigned n)
{
	int i;
	if ((b >= 0x4000) || (b + n - 1 >= 0x4000)) return n;
	if (!((le32_to_cpu(bmp[(b & 0x3fff) >> 5]) >> (b & 0x1f)) & 1)) return 1;
	for (i = 1; i < n; i++)
		if (!((le32_to_cpu(bmp[((b+i) & 0x3fff) >> 5]) >> ((b+i) & 0x1f)) & 1))
			return i + 1;
	return 0;
}

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Linus Torvalds (pre-git)
123
93.89%
1
25.00%
Mikulas Patocka
6
4.58%
1
25.00%
Dave Jones
1
0.76%
1
25.00%
Al Viro
1
0.76%
1
25.00%
Total
131
100.00%
4
100.00%

/* alloc.c */

int hpfs_chk_sectors(struct super_block *, secno, int, char *);
secno hpfs_alloc_sector(struct super_block *, secno, unsigned, 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 *);
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 **);
int hpfs_trim_fs(struct super_block *, u64, u64, u64, unsigned *);

/* 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, const 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 */

secno hpfs_search_hotfix_map(struct super_block *s, secno sec);
unsigned hpfs_search_hotfix_map_for_range(struct super_block *s, secno sec, unsigned n);
void hpfs_prefetch_sectors(struct super_block *, unsigned, int);
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 */

extern const struct dentry_operations hpfs_dentry_operations;

/* dir.c */

struct dentry *hpfs_lookup(struct inode *, struct dentry *, unsigned int);
extern const struct file_operations hpfs_dir_ops;

/* dnode.c */

int 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 *,
				const unsigned char *, unsigned, secno);
int hpfs_add_dirent(struct inode *, const unsigned char *, unsigned,
		    struct hpfs_dirent *);
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,
			       const unsigned 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 *, const char *,
		 const char *, int);

/* file.c */

int hpfs_file_fsync(struct file *, loff_t, loff_t, int);
void hpfs_truncate(struct inode *);
extern const struct file_operations hpfs_file_ops;
extern const struct inode_operations hpfs_file_iops;
extern const 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_setattr(struct dentry *, struct iattr *);
void hpfs_write_if_changed(struct inode *);
void hpfs_evict_inode(struct inode *);

/* map.c */

__le32 *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *);
__le32 *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *);
void hpfs_prefetch_bitmap(struct super_block *, unsigned);
unsigned char *hpfs_load_code_page(struct super_block *, secno);
__le32 *hpfs_load_bitmap_directory(struct super_block *, secno bmp);
void hpfs_load_hotfix_map(struct super_block *s, struct hpfs_spare_block *spareblock);
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(const unsigned char *, unsigned *);
unsigned char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int);
int hpfs_compare_names(struct super_block *, const unsigned char *, unsigned,
		       const unsigned char *, unsigned, int);
int hpfs_is_name_long(const unsigned char *, unsigned);
void hpfs_adjust_length(const unsigned char *, unsigned *);

/* namei.c */

extern const struct inode_operations hpfs_dir_iops;
extern const struct address_space_operations hpfs_symlink_aops;



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

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24
96.00%
1
50.00%
Rasmus Villemoes
1
4.00%
1
50.00%
Total
25
100.00%
2
100.00%



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

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2
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19
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2
100.00%

/* super.c */

__printf(2, 3)
void hpfs_error(struct super_block *, const char *, ...);
int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *);
unsigned hpfs_get_free_dnodes(struct super_block *);
long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg);

/*
 * 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;
}

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Brian Gerst
34
94.44%
1
33.33%
relf@os2.ru
1
2.78%
1
33.33%
Dave Jones
1
2.78%
1
33.33%
Total
36
100.00%
3
100.00%



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;
}

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Brian Gerst
34
94.44%
1
33.33%
relf@os2.ru
1
2.78%
1
33.33%
Dave Jones
1
2.78%
1
33.33%
Total
36
100.00%
3
100.00%

/*
 * Locking:
 *
 * hpfs_lock() locks the whole filesystem. It must be taken
 * on any method called by the VFS.
 *
 * We don't do any per-file locking anymore, it is hard to
 * review and HPFS is not performance-sensitive anyway.
 */


static inline void hpfs_lock(struct super_block *s)
{
	struct hpfs_sb_info *sbi = hpfs_sb(s);
	mutex_lock(&sbi->hpfs_mutex);
}

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Mikulas Patocka
20
66.67%
1
50.00%
Arnd Bergmann
10
33.33%
1
50.00%
Total
30
100.00%
2
100.00%



static inline void hpfs_unlock(struct super_block *s)
{
	struct hpfs_sb_info *sbi = hpfs_sb(s);
	mutex_unlock(&sbi->hpfs_mutex);
}

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Mikulas Patocka
20
66.67%
1
50.00%
Arnd Bergmann
10
33.33%
1
50.00%
Total
30
100.00%
2
100.00%



static inline void hpfs_lock_assert(struct super_block *s)
{
	struct hpfs_sb_info *sbi = hpfs_sb(s);
	WARN_ON(!mutex_is_locked(&sbi->hpfs_mutex));
}
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Mikulas Patocka
34
100.00%
1
100.00%
Total
34
100.00%
1
100.00%

Overall Contributors
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Tokens
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Linus Torvalds (pre-git)
1583
67.28%
6
12.50%
Mikulas Patocka
312
13.26%
8
16.67%
Al Viro
244
10.37%
12
25.00%
Brian Gerst
88
3.74%
2
4.17%
Dave Jones
27
1.15%
1
2.08%
Linus Torvalds
25
1.06%
2
4.17%
Arnd Bergmann
20
0.85%
1
2.08%
Fabian Frederick
15
0.64%
1
2.08%
Marco Stornelli
8
0.34%
1
2.08%
Joe Perches
7
0.30%
1
2.08%
Christoph Hellwig
5
0.21%
3
6.25%
Josef Bacik
4
0.17%
1
2.08%
Ingo Molnar
4
0.17%
2
4.17%
Arjan van de Ven
4
0.17%
2
4.17%
relf@os2.ru
2
0.08%
1
2.08%
Eric W. Biedermann
2
0.08%
1
2.08%
Trond Myklebust
1
0.04%
1
2.08%
Alexey Dobriyan
1
0.04%
1
2.08%
Rasmus Villemoes
1
0.04%
1
2.08%
Total
2353
100.00%
48
100.00%
Directory: fs/hpfs

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