summaryrefslogtreecommitdiffstats
path: root/sbin/fsck_ffs/fsck.h
blob: f0280fe11fe65f9510cd183ea3377f52daf4b16e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
/*
 * Copyright (c) 1980, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)fsck.h	8.4 (Berkeley) 5/9/95
 * $FreeBSD$
 */

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>

#define	MAXDUP		10	/* limit on dup blks (per inode) */
#define	MAXBAD		10	/* limit on bad blks (per inode) */
#define	MAXBUFSPACE	40*1024	/* maximum space to allocate to buffers */
#define	INOBUFSIZE	56*1024	/* size of buffer to read inodes in pass1 */

/*
 * Each inode on the filesystem is described by the following structure.
 * The linkcnt is initially set to the value in the inode. Each time it
 * is found during the descent in passes 2, 3, and 4 the count is
 * decremented. Any inodes whose count is non-zero after pass 4 needs to
 * have its link count adjusted by the value remaining in ino_linkcnt.
 */
struct inostat {
	char	ino_state;	/* state of inode, see below */
	char	ino_type;	/* type of inode */
	short	ino_linkcnt;	/* number of links not found */
};
/*
 * Inode states.
 */
#define	USTATE	01		/* inode not allocated */
#define	FSTATE	02		/* inode is file */
#define	DSTATE	03		/* inode is directory */
#define	DFOUND	04		/* directory found during descent */
#define	DCLEAR	05		/* directory is to be cleared */
#define	FCLEAR	06		/* file is to be cleared */
/*
 * Inode state information is contained on per cylinder group lists
 * which are described by the following structure.
 */
struct inostatlist {
	long	il_numalloced;	/* number of inodes allocated in this cg */
	struct inostat *il_stat;/* inostat info for this cylinder group */
} *inostathead;

/*
 * buffer cache structure.
 */
struct bufarea {
	struct bufarea *b_next;		/* free list queue */
	struct bufarea *b_prev;		/* free list queue */
	ufs_daddr_t b_bno;
	int b_size;
	int b_errs;
	int b_flags;
	union {
		char *b_buf;			/* buffer space */
		ufs_daddr_t *b_indir;		/* indirect block */
		struct fs *b_fs;		/* super block */
		struct cg *b_cg;		/* cylinder group */
		struct dinode *b_dinode;	/* inode block */
	} b_un;
	char b_dirty;
};

#define	B_INUSE 1

#define	MINBUFS		5	/* minimum number of buffers required */
struct bufarea bufhead;		/* head of list of other blks in filesys */
struct bufarea sblk;		/* file system superblock */
struct bufarea cgblk;		/* cylinder group blocks */
struct bufarea *pdirbp;		/* current directory contents */
struct bufarea *pbp;		/* current inode block */

#define	dirty(bp)	(bp)->b_dirty = 1
#define	initbarea(bp) \
	(bp)->b_dirty = 0; \
	(bp)->b_bno = (ufs_daddr_t)-1; \
	(bp)->b_flags = 0;

#define	sbdirty()	sblk.b_dirty = 1
#define	cgdirty()	cgblk.b_dirty = 1
#define	sblock		(*sblk.b_un.b_fs)
#define	cgrp		(*cgblk.b_un.b_cg)

enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE};
ino_t cursnapshot;

struct inodesc {
	enum fixstate id_fix;	/* policy on fixing errors */
	int (*id_func)();	/* function to be applied to blocks of inode */
	ino_t id_number;	/* inode number described */
	ino_t id_parent;	/* for DATA nodes, their parent */
	int id_lbn;		/* logical block number of current block */
	ufs_daddr_t id_blkno;	/* current block number being examined */
	int id_numfrags;	/* number of frags contained in block */
	quad_t id_filesize;	/* for DATA nodes, the size of the directory */
	int id_loc;		/* for DATA nodes, current location in dir */
	int id_entryno;		/* for DATA nodes, current entry number */
	struct direct *id_dirp;	/* for DATA nodes, ptr to current entry */
	char *id_name;		/* for DATA nodes, name to find or enter */
	char id_type;		/* type of descriptor, DATA or ADDR */
};
/* file types */
#define	DATA	1	/* a directory */
#define	SNAP	2	/* a snapshot */
#define	ADDR	3	/* anything but a directory or a snapshot */

/*
 * Linked list of duplicate blocks.
 *
 * The list is composed of two parts. The first part of the
 * list (from duplist through the node pointed to by muldup)
 * contains a single copy of each duplicate block that has been
 * found. The second part of the list (from muldup to the end)
 * contains duplicate blocks that have been found more than once.
 * To check if a block has been found as a duplicate it is only
 * necessary to search from duplist through muldup. To find the
 * total number of times that a block has been found as a duplicate
 * the entire list must be searched for occurences of the block
 * in question. The following diagram shows a sample list where
 * w (found twice), x (found once), y (found three times), and z
 * (found once) are duplicate block numbers:
 *
 *    w -> y -> x -> z -> y -> w -> y
 *    ^		     ^
 *    |		     |
 * duplist	  muldup
 */
struct dups {
	struct dups *next;
	ufs_daddr_t dup;
};
struct dups *duplist;		/* head of dup list */
struct dups *muldup;		/* end of unique duplicate dup block numbers */

/*
 * Linked list of inodes with zero link counts.
 */
struct zlncnt {
	struct zlncnt *next;
	ino_t zlncnt;
};
struct zlncnt *zlnhead;		/* head of zero link count list */

/*
 * Inode cache data structures.
 */
struct inoinfo {
	struct	inoinfo *i_nexthash;	/* next entry in hash chain */
	ino_t	i_number;		/* inode number of this entry */
	ino_t	i_parent;		/* inode number of parent */
	ino_t	i_dotdot;		/* inode number of `..' */
	size_t	i_isize;		/* size of inode */
	u_int	i_numblks;		/* size of block array in bytes */
	ufs_daddr_t i_blks[1];		/* actually longer */
} **inphead, **inpsort;
long numdirs, dirhash, listmax, inplast;
long countdirs;			/* number of directories we actually found */

char	*cdevname;		/* name of device being checked */
long	dev_bsize;		/* computed value of DEV_BSIZE */
long	secsize;		/* actual disk sector size */
char	fflag;			/* force check, ignore clean flag */
char	nflag;			/* assume a no response */
char	yflag;			/* assume a yes response */
int	bflag;			/* location of alternate super block */
int	debug;			/* output debugging info */
int	cvtlevel;		/* convert to newer file system format */
int	doinglevel1;		/* converting to new cylinder group format */
int	doinglevel2;		/* converting to new inode format */
int	newinofmt;		/* filesystem has new inode format */
char	usedsoftdep;		/* just fix soft dependency inconsistencies */
char	preen;			/* just fix normal inconsistencies */
char	rerun;			/* rerun fsck. Only used in non-preen mode */
int	returntosingle;		/* 1 => return to single user mode on exit */
char	resolved;		/* cleared if unresolved changes => not clean */
char	havesb;			/* superblock has been read */
int	fsmodified;		/* 1 => write done to file system */
int	fsreadfd;		/* file descriptor for reading file system */
int	fswritefd;		/* file descriptor for writing file system */

ufs_daddr_t maxfsblock;		/* number of blocks in the file system */
char	*blockmap;		/* ptr to primary blk allocation map */
ino_t	maxino;			/* number of inodes in file system */

ino_t	lfdir;			/* lost & found directory inode number */
char	*lfname;		/* lost & found directory name */
int	lfmode;			/* lost & found directory creation mode */

ufs_daddr_t n_blks;		/* number of blocks in use */
ufs_daddr_t n_files;		/* number of files in use */

#define	clearinode(dp)	(*(dp) = zino)
struct	dinode zino;

#define	setbmap(blkno)	setbit(blockmap, blkno)
#define	testbmap(blkno)	isset(blockmap, blkno)
#define	clrbmap(blkno)	clrbit(blockmap, blkno)

#define	STOP	0x01
#define	SKIP	0x02
#define	KEEPON	0x04
#define	ALTERED	0x08
#define	FOUND	0x10

#define	EEXIT	8		/* Standard error exit. */

struct fstab;


void		adjust __P((struct inodesc *, int lcnt));
ufs_daddr_t	allocblk __P((long frags));
ino_t		allocdir __P((ino_t parent, ino_t request, int mode));
ino_t		allocino __P((ino_t request, int type));
void		blkerror __P((ino_t ino, char *type, ufs_daddr_t blk));
char	       *blockcheck __P((char *name));
int		bread __P((int fd, char *buf, ufs_daddr_t blk, long size));
void		bufinit __P((void));
void		bwrite __P((int fd, char *buf, ufs_daddr_t blk, long size));
void		cacheino __P((struct dinode *dp, ino_t inumber));
void		catch __P((int));
void		catchquit __P((int));
int		changeino __P((ino_t dir, char *name, ino_t newnum));
int		checkfstab __P((int preen, int maxrun,
			int (*docheck)(struct fstab *),
			int (*chkit)(char *, char *, long, int)));
int		chkrange __P((ufs_daddr_t blk, int cnt));
void		ckfini __P((int markclean));
int		ckinode __P((struct dinode *dp, struct inodesc *));
void		clri __P((struct inodesc *, char *type, int flag));
int		clearentry __P((struct inodesc *));
void		direrror __P((ino_t ino, char *errmesg));
int		dirscan __P((struct inodesc *));
int		dofix __P((struct inodesc *, char *msg));
void		ffs_clrblock __P((struct fs *, u_char *, ufs_daddr_t));
void		ffs_fragacct __P((struct fs *, int, int32_t [], int));
int		ffs_isblock __P((struct fs *, u_char *, ufs_daddr_t));
void		ffs_setblock __P((struct fs *, u_char *, ufs_daddr_t));
void		fileerror __P((ino_t cwd, ino_t ino, char *errmesg));
int		findino __P((struct inodesc *));
int		findname __P((struct inodesc *));
void		flush __P((int fd, struct bufarea *bp));
void		freeblk __P((ufs_daddr_t blkno, long frags));
void		freeino __P((ino_t ino));
void		freeinodebuf __P((void));
int		ftypeok __P((struct dinode *dp));
void		getblk __P((struct bufarea *bp, ufs_daddr_t blk, long size));
struct bufarea *getdatablk __P((ufs_daddr_t blkno, long size));
struct inoinfo *getinoinfo __P((ino_t inumber));
struct dinode  *getnextinode __P((ino_t inumber));
void		getpathname __P((char *namebuf, ino_t curdir, ino_t ino));
struct dinode  *ginode __P((ino_t inumber));
void		inocleanup __P((void));
void		inodirty __P((void));
struct inostat *inoinfo __P((ino_t inum));
int		linkup __P((ino_t orphan, ino_t parentdir, char *name));
int		makeentry __P((ino_t parent, ino_t ino, char *name));
void		panic __P((const char *fmt, ...));
void		pass1 __P((void));
void		pass1b __P((void));
int		pass1check __P((struct inodesc *));
void		pass2 __P((void));
void		pass3 __P((void));
void		pass4 __P((void));
int		pass4check __P((struct inodesc *));
void		pass5 __P((void));
void		pfatal __P((const char *fmt, ...));
void		pinode __P((ino_t ino));
void		propagate __P((void));
void		pwarn __P((const char *fmt, ...));
int		reply __P((char *question));
void		setinodebuf __P((ino_t));
int		setup __P((char *dev));
void		voidquit __P((int));
OpenPOWER on IntegriCloud