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
|
/*
Copyright (C) 1994 Free Software Foundation, Inc.
Written by Michael I. Bushnell.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "fsck.h"
#include <sys/stat.h>
#include <fcntl.h>
static char sblockbuf[SBSIZE];
struct fs *sblock = (struct fs *)sblockbuf;
/* A string identifying what we're trying to check. */
char *device_name = 0;
/* Get ready to run on device with pathname DEV. */
int
setup (char *dev)
{
struct stat st;
int changedsb;
size_t bmapsize;
device_name = dev;
if (stat (dev, &st) == -1)
{
perror (dev);
return 0;
}
if (!S_ISCHR (st.st_mode))
{
pfatal ("%s is not a character device", dev);
if (!reply ("CONTINUE"))
return 0;
}
if (preen == 0)
printf ("** %s", dev);
if (!nowrite)
readfd = open (dev, O_RDWR);
if (nowrite || readfd == -1)
{
readfd = open (dev, O_RDONLY);
if (readfd == -1)
{
perror (dev);
return 0;
}
writefd = -1;
nowrite = 1;
if (preen)
pfatal ("NO WRITE ACCESS");
printf (" (NO WRITE)");
}
else
writefd = readfd;
if (preen == 0)
printf ("\n");
lfdir = 0;
/* We don't do the alternate superblock stuff here (yet). */
readblock (SBLOCK, sblock, SBSIZE);
changedsb = 0;
if (sblock->fs_magic != FS_MAGIC)
{
pfatal ("BAD MAGIC NUMBER");
return 0;
}
if (sblock->fs_ncg < 1)
{
pfatal ("NCG OUT OF RANGE");
return 0;
}
if (sblock->fs_cpg < 1)
{
pfatal ("CPG OUT OF RANGE");
return 0;
}
if (sblock->fs_ncg * sblock->fs_cpg < sblock->fs_ncyl
|| (sblock->fs_ncg - 1) * sblock->fs_cpg >= sblock->fs_ncyl)
{
pfatal ("NCYL INCONSISTENT WITH NCG AND CPG");
return 0;
}
if (sblock->fs_sbsize > SBSIZE)
{
pfatal ("SBLOCK SIZE PREPONTEROUSLY LARGE");
return 0;
}
if (sblock->fs_optim != FS_OPTTIME && sblock->fs_optim != FS_OPTSPACE)
{
pfatal ("UNDEFINED OPTIMIZATION IN SUPERBLOCK");
if (reply ("SET TO DEFAULT"))
{
sblock->fs_optim = FS_OPTTIME;
changedsb = 1;
}
}
if (sblock->fs_minfree < 0 || sblock->fs_minfree > 99)
{
pfatal ("IMPOSSIBLE MINFREE=%ld IN SUPERBLOCK", sblock->fs_minfree);
if (reply ("SET TO DEFAULT"))
{
sblock->fs_minfree = 10;
changedsb = 1;
}
}
if (sblock->fs_interleave < 1
|| sblock->fs_interleave > sblock->fs_nsect)
{
pwarn ("IMPOSSIBLE INTERLEAVE=%ld IN SUPERBLOCK", sblock->fs_interleave);
if (preen || reply ("SET TO DEFAULT"))
{
if (preen)
printf (" (SET TO DEFAULT)");
sblock->fs_interleave = 1;
changedsb = 1;
}
}
if (sblock->fs_npsect < sblock->fs_nsect
|| sblock->fs_npsect > sblock->fs_nsect * 2)
{
pwarn ("IMPOSSIBLE NPSECT=%ld IN SUPERBLOCK", sblock->fs_npsect);
if (preen || reply ("SET TO DEFAULT"))
{
if (preen)
printf (" (SET TO DEFAULT)");
sblock->fs_npsect = sblock->fs_nsect;
changedsb = 1;
}
}
if (sblock->fs_inodefmt >= FS_44INODEFMT)
newinofmt = 1;
else
{
sblock->fs_qbmask = ~sblock->fs_bmask;
sblock->fs_qfmask = ~sblock->fs_fmask;
newinofmt = 0;
}
if (changedsb)
writeblock (SBLOCK, sblock, SBSIZE);
/* Constants */
maxfsblock = sblock->fs_size;
maxino = sblock->fs_ncg * sblock->fs_ipg;
direct_symlink_extension = sblock->fs_maxsymlinklen > 0;
/* Allocate and initialize maps */
bmapsize = roundup (howmany (maxfsblock, NBBY), sizeof (short));
blockmap = calloc (bmapsize, sizeof (char));
inodestate = calloc (maxino + 1, sizeof (char));
typemap = calloc (maxino + 1, sizeof (char));
linkcount = calloc (maxino + 1, sizeof (nlink_t));
linkfound = calloc (maxino + 1, sizeof (nlink_t));
return 1;
}
|
