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 8.1 (Berkeley) 6/5/93
34 */
35
36#define MAXDUP 10 /* limit on dup blks (per inode) */
37#define MAXBAD 10 /* limit on bad blks (per inode) */
38#define MAXBUFSPACE 40*1024 /* maximum space to allocate to buffers */
39#define INOBUFSIZE 56*1024 /* size of buffer to read inodes in pass1 */
40
41#ifndef BUFSIZ
42#define BUFSIZ 1024
43#endif
44
45#define USTATE 01 /* inode not allocated */
46#define FSTATE 02 /* inode is file */
47#define DSTATE 03 /* inode is directory */
48#define DFOUND 04 /* directory found during descent */
49#define DCLEAR 05 /* directory is to be cleared */
50#define FCLEAR 06 /* file is to be cleared */
51
52/*
53 * buffer cache structure.
54 */
55struct bufarea {
56 struct bufarea *b_next; /* free list queue */
57 struct bufarea *b_prev; /* free list queue */
58 daddr_t b_bno;
59 int b_size;
60 int b_errs;
61 int b_flags;
62 union {
63 char *b_buf; /* buffer space */
64 daddr_t *b_indir; /* indirect block */
65 struct fs *b_fs; /* super block */
66 struct cg *b_cg; /* cylinder group */
67 struct dinode *b_dinode; /* inode block */
68 } b_un;
69 char b_dirty;
70};
71
72#define B_INUSE 1
73
74#define MINBUFS 5 /* minimum number of buffers required */
75struct bufarea bufhead; /* head of list of other blks in filesys */
76struct bufarea sblk; /* file system superblock */
77struct bufarea cgblk; /* cylinder group blocks */
78struct bufarea *pdirbp; /* current directory contents */
79struct bufarea *pbp; /* current inode block */
80struct bufarea *getdatablk();
81
82#define dirty(bp) (bp)->b_dirty = 1
83#define initbarea(bp) \
84 (bp)->b_dirty = 0; \
85 (bp)->b_bno = (daddr_t)-1; \
86 (bp)->b_flags = 0;
87
88#define sbdirty() sblk.b_dirty = 1
89#define cgdirty() cgblk.b_dirty = 1
90#define sblock (*sblk.b_un.b_fs)
91#define cgrp (*cgblk.b_un.b_cg)
92
93enum fixstate {DONTKNOW, NOFIX, FIX, IGNORE};
94
95struct inodesc {
96 enum fixstate id_fix; /* policy on fixing errors */
97 int (*id_func)(); /* function to be applied to blocks of inode */
98 ino_t id_number; /* inode number described */
99 ino_t id_parent; /* for DATA nodes, their parent */
100 daddr_t id_blkno; /* current block number being examined */
101 int id_numfrags; /* number of frags contained in block */
102 quad_t id_filesize; /* for DATA nodes, the size of the directory */
103 int id_loc; /* for DATA nodes, current location in dir */
104 int id_entryno; /* for DATA nodes, current entry number */
105 struct direct *id_dirp; /* for DATA nodes, ptr to current entry */
106 char *id_name; /* for DATA nodes, name to find or enter */
107 char id_type; /* type of descriptor, DATA or ADDR */
108};
109/* file types */
110#define DATA 1
111#define ADDR 2
112
113/*
114 * Linked list of duplicate blocks.
115 *
116 * The list is composed of two parts. The first part of the
117 * list (from duplist through the node pointed to by muldup)
118 * contains a single copy of each duplicate block that has been
119 * found. The second part of the list (from muldup to the end)
120 * contains duplicate blocks that have been found more than once.
121 * To check if a block has been found as a duplicate it is only
122 * necessary to search from duplist through muldup. To find the
123 * total number of times that a block has been found as a duplicate
124 * the entire list must be searched for occurences of the block
125 * in question. The following diagram shows a sample list where
126 * w (found twice), x (found once), y (found three times), and z
127 * (found once) are duplicate block numbers:
128 *
129 * w -> y -> x -> z -> y -> w -> y
130 * ^ ^
131 * | |
132 * duplist muldup
133 */
134struct dups {
135 struct dups *next;
136 daddr_t dup;
137};
138struct dups *duplist; /* head of dup list */
139struct dups *muldup; /* end of unique duplicate dup block numbers */
140
141/*
142 * Linked list of inodes with zero link counts.
143 */
144struct zlncnt {
145 struct zlncnt *next;
146 ino_t zlncnt;
147};
148struct zlncnt *zlnhead; /* head of zero link count list */
149
150/*
151 * Inode cache data structures.
152 */
153struct inoinfo {
154 struct inoinfo *i_nexthash; /* next entry in hash chain */
155 ino_t i_number; /* inode number of this entry */
156 ino_t i_parent; /* inode number of parent */
157 ino_t i_dotdot; /* inode number of `..' */
158 size_t i_isize; /* size of inode */
159 u_int i_numblks; /* size of block array in bytes */
160 daddr_t i_blks[1]; /* actually longer */
161} **inphead, **inpsort;
162long numdirs, listmax, inplast;
163
164char *cdevname; /* name of device being checked */
165long dev_bsize; /* computed value of DEV_BSIZE */
166long secsize; /* actual disk sector size */
167char fflag; /* force fs check (ignore clean flag) */
168char nflag; /* assume a no response */
169char yflag; /* assume a yes response */
170int bflag; /* location of alternate super block */
171int debug; /* output debugging info */
172int cvtlevel; /* convert to newer file system format */
173int doinglevel1; /* converting to new cylinder group format */
174int doinglevel2; /* converting to new inode format */
175int newinofmt; /* filesystem has new inode format */
176char preen; /* just fix normal inconsistencies */
177char hotroot; /* checking root device */
178char havesb; /* superblock has been read */
179int fsmodified; /* 1 => write done to file system */
180int fsreadfd; /* file descriptor for reading file system */
181int fswritefd; /* file descriptor for writing file system */
182int returntosingle; /* return to single user mode */
183int rerun; /* rerun fsck. Only used in non-preen mode */
184
185daddr_t maxfsblock; /* number of blocks in the file system */
186char *blockmap; /* ptr to primary blk allocation map */
187ino_t maxino; /* number of inodes in file system */
188ino_t lastino; /* last inode in use */
189char *statemap; /* ptr to inode state table */
190unsigned char *typemap; /* ptr to inode type table */
191short *lncntp; /* ptr to link count table */
192
193ino_t lfdir; /* lost & found directory inode number */
194char *lfname; /* lost & found directory name */
195int lfmode; /* lost & found directory creation mode */
196
197daddr_t n_blks; /* number of blocks in use */
198daddr_t n_files; /* number of files in use */
199
200#define clearinode(dp) (*(dp) = zino)
201struct dinode zino;
202
203#define setbmap(blkno) setbit(blockmap, blkno)
204#define testbmap(blkno) isset(blockmap, blkno)
205#define clrbmap(blkno) clrbit(blockmap, blkno)
206
207#define STOP 0x01
208#define SKIP 0x02
209#define KEEPON 0x04
210#define ALTERED 0x08
211#define FOUND 0x10
212
213/* dir.c */
214void adjust __P((struct inodesc *idesc, short lcnt));
215ino_t allocdir __P((ino_t parent, ino_t request, int mode));
216int changeino __P((ino_t dir, char *name, ino_t newnum));
217void direrror __P((ino_t ino, char *errmesg));
218int dirscan __P((struct inodesc *idesc));
219void fileerror __P((ino_t cwd, ino_t ino, char *errmesg));
220int linkup __P((ino_t orphan, ino_t parentdir));
221int makeentry __P((ino_t parent, ino_t ino, char *name));
222void propagate __P((void));
223
224/* ffs_subr.c */
225void ffs_fragacct __P((struct fs *fs, int fragmap, long *fraglist, int cnt));
226
227/* inode.c */
228ino_t allocino __P((ino_t request, int type));
229void blkerror __P((ino_t ino, char *type, daddr_t blk));
230void cacheino __P((struct dinode *dp, ino_t inumber));
231int chkrange __P((daddr_t blk, int cnt));
232int ckinode __P((struct dinode *dp, struct inodesc *idesc));
233void clri __P((struct inodesc *idesc, char *type, int flag));
234int findino __P((struct inodesc *idesc));
235void freeino __P((ino_t ino));
236void freeinodebuf __P((void));
237struct dinode * ginode __P((ino_t inumber));
238struct inoinfo * getinoinfo __P((ino_t inumber));
239struct dinode * getnextinode __P((ino_t inumber));
240void inodirty __P((void));
241void inocleanup __P((void));
242void pinode __P((ino_t ino));
243void resetinodebuf __P((void));
244int findname __P((struct inodesc *idesc));
245
246/* pass1.c */
247void pass1 __P((void));
248int pass1check __P((struct inodesc *idesc));
249
250/* pass1b.c */
251void pass1b __P((void));
252
253/* pass2.c */
254void pass2 __P((void));
255
256/* pass3.c */
257void pass3 __P((void));
258
259/* pass4.c */
260void pass4 __P((void));
261int pass4check __P((struct inodesc *idesc));
262
263/* pass5.c */
264void pass5 __P((void));
265
266/* preen.c */
267char *blockcheck __P((char *name));
268int checkfstab __P((int preen, int maxrun,int (*docheck)(), int (*chkit)()));
269
270/* setup.c */
271int setup __P((char *dev));
272
273/* utilities.c */
274int allocblk __P((long frags));
275int bread __P((int fd, char *buf, daddr_t blk, long size));
276void bufinit __P((void));
277void bwrite __P((int fd, char *buf, daddr_t blk, long size));
278void catch __P((int));
279void catchquit __P((int));
280void ckfini __P((void));
281int dofix __P((struct inodesc *idesc, char *msg));
282void errexit __P((const char *s1, ...)) __dead2;
283void flush __P((int fd, struct bufarea *bp));
284void freeblk __P((daddr_t blkno, long frags));
285int ftypeok __P((struct dinode *dp));
286void getblk __P((struct bufarea *bp, daddr_t blk, long size));
287struct bufarea * getdatablk __P((daddr_t blkno, long size));
288void getpathname __P((char *namebuf, ino_t curdir, ino_t ino));
289void panic __P((const char *, ...)) __dead2;
290void pfatal __P((const char *s1, ...));
291void pwarn __P((const char *s1, ...));
292int reply __P((char *question));
293void voidquit __P((int));