Change the kernel dev_t, representing a pointer to a specinfo structure,
[dragonfly.git] / sbin / fsck / fsck.h
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1/*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)fsck.h 8.4 (Berkeley) 5/9/95
34 * $FreeBSD: src/sbin/fsck/fsck.h,v 1.12.2.1 2001/01/23 23:11:07 iedowse Exp $
b13267a5 35 * $DragonFly: src/sbin/fsck/fsck.h,v 1.6 2006/09/10 01:26:27 dillon Exp $
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36 */
37
38#include <unistd.h>
39#include <stdlib.h>
40#include <stdio.h>
41
42#define MAXDUP 10 /* limit on dup blks (per inode) */
43#define MAXBAD 10 /* limit on bad blks (per inode) */
44#define MAXBUFSPACE 40*1024 /* maximum space to allocate to buffers */
45#define INOBUFSIZE 56*1024 /* size of buffer to read inodes in pass1 */
46
47/*
48 * Each inode on the filesystem is described by the following structure.
49 * The linkcnt is initially set to the value in the inode. Each time it
50 * is found during the descent in passes 2, 3, and 4 the count is
51 * decremented. Any inodes whose count is non-zero after pass 4 needs to
52 * have its link count adjusted by the value remaining in ino_linkcnt.
53 */
54struct inostat {
55 char ino_state; /* state of inode, see below */
56 char ino_type; /* type of inode */
57 short ino_linkcnt; /* number of links not found */
58};
59/*
60 * Inode states.
61 */
62#define USTATE 01 /* inode not allocated */
63#define FSTATE 02 /* inode is file */
64#define DSTATE 03 /* inode is directory */
65#define DFOUND 04 /* directory found during descent */
66#define DCLEAR 05 /* directory is to be cleared */
67#define FCLEAR 06 /* file is to be cleared */
68/*
69 * Inode state information is contained on per cylinder group lists
70 * which are described by the following structure.
71 */
72struct inostatlist {
73 long il_numalloced; /* number of inodes allocated in this cg */
74 struct inostat *il_stat;/* inostat info for this cylinder group */
75} *inostathead;
76
77/*
78 * buffer cache structure.
79 */
80struct bufarea {
81 struct bufarea *b_next; /* free list queue */
82 struct bufarea *b_prev; /* free list queue */
83 ufs_daddr_t b_bno;
84 int b_size;
85 int b_errs;
86 int b_flags;
87 union {
88 char *b_buf; /* buffer space */
89 ufs_daddr_t *b_indir; /* indirect block */
90 struct fs *b_fs; /* super block */
91 struct cg *b_cg; /* cylinder group */
67ad9090 92 struct ufs1_dinode *b_dinode; /* inode block */
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93 } b_un;
94 char b_dirty;
95};
96
97#define B_INUSE 1
98
99#define MINBUFS 5 /* minimum number of buffers required */
100struct bufarea bufhead; /* head of list of other blks in filesys */
101struct bufarea sblk; /* file system superblock */
102struct bufarea cgblk; /* cylinder group blocks */
103struct bufarea *pdirbp; /* current directory contents */
104struct bufarea *pbp; /* current inode block */
105
106#define dirty(bp) (bp)->b_dirty = 1
107#define initbarea(bp) \
108 (bp)->b_dirty = 0; \
109 (bp)->b_bno = (ufs_daddr_t)-1; \
110 (bp)->b_flags = 0;
111
112#define sbdirty() sblk.b_dirty = 1
113#define cgdirty() cgblk.b_dirty = 1
114#define sblock (*sblk.b_un.b_fs)
115#define cgrp (*cgblk.b_un.b_cg)
116
117enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE};
118
119struct inodesc {
120 enum fixstate id_fix; /* policy on fixing errors */
121 int (*id_func)(); /* function to be applied to blocks of inode */
122 ino_t id_number; /* inode number described */
123 ino_t id_parent; /* for DATA nodes, their parent */
124 ufs_daddr_t id_blkno; /* current block number being examined */
125 int id_numfrags; /* number of frags contained in block */
126 quad_t id_filesize; /* for DATA nodes, the size of the directory */
127 int id_loc; /* for DATA nodes, current location in dir */
128 int id_entryno; /* for DATA nodes, current entry number */
129 struct direct *id_dirp; /* for DATA nodes, ptr to current entry */
130 char *id_name; /* for DATA nodes, name to find or enter */
131 char id_type; /* type of descriptor, DATA or ADDR */
132};
133/* file types */
134#define DATA 1
135#define ADDR 2
136
137/*
138 * Linked list of duplicate blocks.
139 *
140 * The list is composed of two parts. The first part of the
141 * list (from duplist through the node pointed to by muldup)
142 * contains a single copy of each duplicate block that has been
143 * found. The second part of the list (from muldup to the end)
144 * contains duplicate blocks that have been found more than once.
145 * To check if a block has been found as a duplicate it is only
146 * necessary to search from duplist through muldup. To find the
147 * total number of times that a block has been found as a duplicate
148 * the entire list must be searched for occurences of the block
149 * in question. The following diagram shows a sample list where
150 * w (found twice), x (found once), y (found three times), and z
151 * (found once) are duplicate block numbers:
152 *
153 * w -> y -> x -> z -> y -> w -> y
154 * ^ ^
155 * | |
156 * duplist muldup
157 */
158struct dups {
159 struct dups *next;
160 ufs_daddr_t dup;
161};
162struct dups *duplist; /* head of dup list */
163struct dups *muldup; /* end of unique duplicate dup block numbers */
164
165/*
166 * Linked list of inodes with zero link counts.
167 */
168struct zlncnt {
169 struct zlncnt *next;
170 ino_t zlncnt;
171};
172struct zlncnt *zlnhead; /* head of zero link count list */
173
174/*
175 * Inode cache data structures.
176 */
177struct inoinfo {
178 struct inoinfo *i_nexthash; /* next entry in hash chain */
179 ino_t i_number; /* inode number of this entry */
180 ino_t i_parent; /* inode number of parent */
181 ino_t i_dotdot; /* inode number of `..' */
182 size_t i_isize; /* size of inode */
183 u_int i_numblks; /* size of block array in bytes */
184 ufs_daddr_t i_blks[1]; /* actually longer */
185} **inphead, **inpsort;
b13267a5 186long numdirs, dirhash, listmax, inplast, dirhashmask;
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187long countdirs; /* number of directories we actually found */
188
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189/*
190 * Be careful about cache locality of reference, large filesystems may
191 * have tens of millions of directories in them and if fsck has to swap
192 * we want it to swap efficiently. For this reason we try to group
193 * adjacent inodes together by a reasonable factor.
194 */
195#define DIRHASH(ino) ((ino >> 3) & dirhashmask)
196
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197char *cdevname; /* name of device being checked */
198long dev_bsize; /* computed value of DEV_BSIZE */
199long secsize; /* actual disk sector size */
200char fflag; /* force check, ignore clean flag */
201char nflag; /* assume a no response */
202char yflag; /* assume a yes response */
203int bflag; /* location of alternate super block */
204int debug; /* output debugging info */
205int cvtlevel; /* convert to newer file system format */
206int doinglevel1; /* converting to new cylinder group format */
207int doinglevel2; /* converting to new inode format */
208int newinofmt; /* filesystem has new inode format */
209char usedsoftdep; /* just fix soft dependency inconsistencies */
210char preen; /* just fix normal inconsistencies */
211char rerun; /* rerun fsck. Only used in non-preen mode */
212int returntosingle; /* 1 => return to single user mode on exit */
213char resolved; /* cleared if unresolved changes => not clean */
214char havesb; /* superblock has been read */
215int fsmodified; /* 1 => write done to file system */
216int fsreadfd; /* file descriptor for reading file system */
217int fswritefd; /* file descriptor for writing file system */
218
219ufs_daddr_t maxfsblock; /* number of blocks in the file system */
220char *blockmap; /* ptr to primary blk allocation map */
221ino_t maxino; /* number of inodes in file system */
222
223ino_t lfdir; /* lost & found directory inode number */
224char *lfname; /* lost & found directory name */
225int lfmode; /* lost & found directory creation mode */
226
227ufs_daddr_t n_blks; /* number of blocks in use */
228ufs_daddr_t n_files; /* number of files in use */
229
230int got_siginfo; /* received a SIGINFO */
231
232#define clearinode(dp) (*(dp) = zino)
67ad9090 233struct ufs1_dinode zino;
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234
235#define setbmap(blkno) setbit(blockmap, blkno)
236#define testbmap(blkno) isset(blockmap, blkno)
237#define clrbmap(blkno) clrbit(blockmap, blkno)
238
239#define STOP 0x01
240#define SKIP 0x02
241#define KEEPON 0x04
242#define ALTERED 0x08
243#define FOUND 0x10
244
245#define EEXIT 8 /* Standard error exit. */
246
247struct fstab;
248
249
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250void adjust(struct inodesc *, int lcnt);
251ufs_daddr_t allocblk(long frags);
252ino_t allocdir(ino_t parent, ino_t request, int mode);
253ino_t allocino(ino_t request, int type);
254void blkerror(ino_t ino, char *type, ufs_daddr_t blk);
255char *blockcheck(char *name);
256int bread(int fd, char *buf, ufs_daddr_t blk, long size);
257void bufinit(void);
258void bwrite(int fd, char *buf, ufs_daddr_t blk, long size);
67ad9090 259void cacheino(struct ufs1_dinode *dp, ino_t inumber);
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260void catch(int);
261void catchquit(int);
262int changeino(ino_t dir, char *name, ino_t newnum);
cd5332df 263int checkfstab(int preen, int maxrun,
984263bc 264 int (*docheck)(struct fstab *),
cd5332df 265 int (*chkit)(char *, char *, long, int));
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266int chkrange(ufs_daddr_t blk, int cnt);
267void ckfini(int markclean);
67ad9090 268int ckinode(struct ufs1_dinode *dp, struct inodesc *);
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269void clri(struct inodesc *, char *type, int flag);
270int clearentry(struct inodesc *);
271void direrror(ino_t ino, char *errmesg);
272int dirscan(struct inodesc *);
273int dofix(struct inodesc *, char *msg);
274void ffs_clrblock(struct fs *, u_char *, ufs_daddr_t);
275void ffs_fragacct(struct fs *, int, int32_t [], int);
276int ffs_isblock(struct fs *, u_char *, ufs_daddr_t);
277void ffs_setblock(struct fs *, u_char *, ufs_daddr_t);
278void fileerror(ino_t cwd, ino_t ino, char *errmesg);
279int findino(struct inodesc *);
280int findname(struct inodesc *);
281void flush(int fd, struct bufarea *bp);
282void freeblk(ufs_daddr_t blkno, long frags);
283void freeino(ino_t ino);
284void freeinodebuf(void);
67ad9090 285int ftypeok(struct ufs1_dinode *dp);
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286void getblk(struct bufarea *bp, ufs_daddr_t blk, long size);
287struct bufarea *getdatablk(ufs_daddr_t blkno, long size);
288struct inoinfo *getinoinfo(ino_t inumber);
67ad9090 289struct ufs1_dinode *getnextinode(ino_t inumber);
9a76cd75 290void getpathname(char *namebuf, ino_t curdir, ino_t ino);
67ad9090 291struct ufs1_dinode *ginode(ino_t inumber);
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292void infohandler(int sig);
293void inocleanup(void);
294void inodirty(void);
295struct inostat *inoinfo(ino_t inum);
296int linkup(ino_t orphan, ino_t parentdir, char *name);
297int makeentry(ino_t parent, ino_t ino, char *name);
298void panic(const char *fmt, ...);
299void pass1(void);
300void pass1b(void);
301int pass1check(struct inodesc *);
302void pass2(void);
303void pass3(void);
304void pass4(void);
305int pass4check(struct inodesc *);
306void pass5(void);
307void pfatal(const char *fmt, ...);
308void pinode(ino_t ino);
309void propagate(void);
310void pwarn(const char *fmt, ...);
311int reply(char *question);
312void setinodebuf(ino_t);
313int setup(char *dev);
314void voidquit(int);