1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * fsck.c - a file system consistency checker for Linux.
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4 | *
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5 | * (C) 1991, 1992 Linus Torvalds. This file may be redistributed
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6 | * as per the GNU copyleft.
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7 | */
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8 |
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9 | /*
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10 | * 09.11.91 - made the first rudimentary functions
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11 | *
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12 | * 10.11.91 - updated, does checking, no repairs yet.
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13 | * Sent out to the mailing-list for testing.
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14 | *
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15 | * 14.11.91 - Testing seems to have gone well. Added some
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16 | * correction-code, and changed some functions.
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17 | *
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18 | * 15.11.91 - More correction code. Hopefully it notices most
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19 | * cases now, and tries to do something about them.
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20 | *
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21 | * 16.11.91 - More corrections (thanks to Mika Jalava). Most
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22 | * things seem to work now. Yeah, sure.
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23 | *
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24 | *
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25 | * 19.04.92 - Had to start over again from this old version, as a
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26 | * kernel bug ate my enhanced fsck in february.
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27 | *
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28 | * 28.02.93 - added support for different directory entry sizes..
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29 | *
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30 | * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
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31 | * super-block information
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32 | *
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33 | * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
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34 | * to that required by fsutil
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35 | *
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36 | * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
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37 | * Added support for file system valid flag. Also
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38 | * added program_version variable and output of
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39 | * program name and version number when program
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40 | * is executed.
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41 | *
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42 | * 30.10.94 - added support for v2 filesystem
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43 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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44 | *
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45 | * 10.12.94 - added test to prevent checking of mounted fs adapted
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46 | * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
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47 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
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48 | *
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49 | * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
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50 | * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
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51 | *
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52 | * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
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53 | * (Russell King). He made them for ARM. It would seem
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54 | * that the ARM is powerful enough to do this in C whereas
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55 | * i386 and m64k must use assembly to get it fast >:-)
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56 | * This should make minix fsck system-independent.
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57 | * (janl@math.uio.no, Nicolai Langfeldt)
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58 | *
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59 | * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
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60 | * warnings. Added mc68k bitops from
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61 | * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
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62 | *
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63 | * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
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64 | * Andreas Schwab.
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65 | *
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66 | * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
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67 | * - added Native Language Support
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68 | *
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69 | *
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70 | * I've had no time to add comments - hopefully the function names
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71 | * are comments enough. As with all file system checkers, this assumes
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72 | * the file system is quiescent - don't use it on a mounted device
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73 | * unless you can be sure nobody is writing to it (and remember that the
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74 | * kernel can write to it when it searches for files).
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75 | *
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76 | * Usage: fsck [-larvsm] device
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77 | * -l for a listing of all the filenames
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78 | * -a for automatic repairs (not implemented)
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79 | * -r for repairs (interactive) (not implemented)
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80 | * -v for verbose (tells how many files)
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81 | * -s for super-block info
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82 | * -m for minix-like "mode not cleared" warnings
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83 | * -f force filesystem check even if filesystem marked as valid
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84 | *
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85 | * The device may be a block device or a image of one, but this isn't
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86 | * enforced (but it's not much fun on a character device :-).
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87 | */
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88 |
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89 | #include <stdio.h>
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90 | #include <errno.h>
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91 | #include <unistd.h>
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92 | #include <string.h>
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93 | #include <fcntl.h>
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94 | #include <ctype.h>
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95 | #include <stdlib.h>
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96 | #include <termios.h>
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97 | #include <mntent.h>
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98 | #include <sys/param.h>
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99 | #include "busybox.h"
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100 |
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101 | /*
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102 | * This is the original minix inode layout on disk.
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103 | * Note the 8-bit gid and atime and ctime.
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104 | */
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105 | struct minix_inode {
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106 | uint16_t i_mode;
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107 | uint16_t i_uid;
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108 | uint32_t i_size;
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109 | uint32_t i_time;
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110 | uint8_t i_gid;
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111 | uint8_t i_nlinks;
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112 | uint16_t i_zone[9];
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113 | };
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114 |
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115 | /*
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116 | * The new minix inode has all the time entries, as well as
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117 | * long block numbers and a third indirect block (7+1+1+1
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118 | * instead of 7+1+1). Also, some previously 8-bit values are
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119 | * now 16-bit. The inode is now 64 bytes instead of 32.
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120 | */
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121 | struct minix2_inode {
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122 | uint16_t i_mode;
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123 | uint16_t i_nlinks;
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124 | uint16_t i_uid;
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125 | uint16_t i_gid;
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126 | uint32_t i_size;
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127 | uint32_t i_atime;
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128 | uint32_t i_mtime;
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129 | uint32_t i_ctime;
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130 | uint32_t i_zone[10];
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131 | };
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132 |
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133 | enum {
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134 | MINIX_ROOT_INO = 1,
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135 | MINIX_LINK_MAX = 250,
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136 | MINIX2_LINK_MAX = 65530,
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137 |
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138 | MINIX_I_MAP_SLOTS = 8,
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139 | MINIX_Z_MAP_SLOTS = 64,
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140 | MINIX_SUPER_MAGIC = 0x137F, /* original minix fs */
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141 | MINIX_SUPER_MAGIC2 = 0x138F, /* minix fs, 30 char names */
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142 | MINIX2_SUPER_MAGIC = 0x2468, /* minix V2 fs */
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143 | MINIX2_SUPER_MAGIC2 = 0x2478, /* minix V2 fs, 30 char names */
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144 | MINIX_VALID_FS = 0x0001, /* Clean fs. */
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145 | MINIX_ERROR_FS = 0x0002, /* fs has errors. */
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146 |
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147 | MINIX_INODES_PER_BLOCK = ((BLOCK_SIZE)/(sizeof (struct minix_inode))),
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148 | MINIX2_INODES_PER_BLOCK = ((BLOCK_SIZE)/(sizeof (struct minix2_inode))),
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149 |
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150 | MINIX_V1 = 0x0001, /* original minix fs */
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151 | MINIX_V2 = 0x0002 /* minix V2 fs */
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152 | };
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153 |
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154 | #define INODE_VERSION(inode) inode->i_sb->u.minix_sb.s_version
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155 |
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156 | /*
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157 | * minix super-block data on disk
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158 | */
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159 | struct minix_super_block {
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160 | uint16_t s_ninodes;
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161 | uint16_t s_nzones;
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162 | uint16_t s_imap_blocks;
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163 | uint16_t s_zmap_blocks;
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164 | uint16_t s_firstdatazone;
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165 | uint16_t s_log_zone_size;
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166 | uint32_t s_max_size;
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167 | uint16_t s_magic;
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168 | uint16_t s_state;
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169 | uint32_t s_zones;
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170 | };
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171 |
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172 | struct minix_dir_entry {
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173 | uint16_t inode;
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174 | char name[0];
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175 | };
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176 |
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177 |
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178 | #define NAME_MAX 255 /* # chars in a file name */
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179 |
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180 | #define MINIX_INODES_PER_BLOCK ((BLOCK_SIZE)/(sizeof (struct minix_inode)))
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181 |
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182 | #ifndef BLKGETSIZE
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183 | #define BLKGETSIZE _IO(0x12,96) /* return device size */
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184 | #endif
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185 |
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186 | #ifndef __linux__
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187 | #define volatile
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188 | #endif
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189 |
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190 | enum { ROOT_INO = 1 };
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191 |
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192 | #define UPPER(size,n) ((size+((n)-1))/(n))
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193 | #define INODE_SIZE (sizeof(struct minix_inode))
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194 | #ifdef CONFIG_FEATURE_MINIX2
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195 | #define INODE_SIZE2 (sizeof(struct minix2_inode))
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196 | #define INODE_BLOCKS UPPER(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
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197 | : MINIX_INODES_PER_BLOCK))
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198 | #else
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199 | #define INODE_BLOCKS UPPER(INODES, (MINIX_INODES_PER_BLOCK))
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200 | #endif
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201 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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202 |
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203 | #define BITS_PER_BLOCK (BLOCK_SIZE<<3)
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204 |
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205 | static char *program_version = "1.2 - 11/11/96";
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206 | static char *device_name;
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207 | static int IN;
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208 | static int repair, automatic, verbose, list, show, warn_mode, force;
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209 | static int directory, regular, blockdev, chardev, links, symlinks, total;
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210 |
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211 | static int changed; /* flags if the filesystem has been changed */
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212 | static int errors_uncorrected; /* flag if some error was not corrected */
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213 | static int dirsize = 16;
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214 | static int namelen = 14;
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215 | static struct termios termios;
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216 | static int termios_set;
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217 |
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218 | static char *inode_buffer;
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219 | #define Inode (((struct minix_inode *) inode_buffer)-1)
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220 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
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221 | static char super_block_buffer[BLOCK_SIZE];
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222 |
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223 | #define Super (*(struct minix_super_block *)super_block_buffer)
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224 | #define INODES ((unsigned long)Super.s_ninodes)
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225 | #ifdef CONFIG_FEATURE_MINIX2
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226 | static int version2;
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227 | #define ZONES ((unsigned long)(version2 ? Super.s_zones : Super.s_nzones))
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228 | #else
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229 | #define ZONES ((unsigned long)(Super.s_nzones))
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230 | #endif
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231 | #define IMAPS ((unsigned long)Super.s_imap_blocks)
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232 | #define ZMAPS ((unsigned long)Super.s_zmap_blocks)
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233 | #define FIRSTZONE ((unsigned long)Super.s_firstdatazone)
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234 | #define ZONESIZE ((unsigned long)Super.s_log_zone_size)
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235 | #define MAXSIZE ((unsigned long)Super.s_max_size)
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236 | #define MAGIC (Super.s_magic)
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237 | #define NORM_FIRSTZONE (2+IMAPS+ZMAPS+INODE_BLOCKS)
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238 |
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239 | static char *inode_map;
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240 | static char *zone_map;
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241 |
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242 | static unsigned char *inode_count;
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243 | static unsigned char *zone_count;
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244 |
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245 | static void recursive_check(unsigned int ino);
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246 | #ifdef CONFIG_FEATURE_MINIX2
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247 | static void recursive_check2(unsigned int ino);
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248 | #endif
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249 |
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250 | static inline int bit(char *a, unsigned int i)
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251 | {
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252 | return (a[i >> 3] & (1<<(i & 7))) != 0;
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253 | }
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254 | #define inode_in_use(x) (bit(inode_map,(x)))
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255 | #define zone_in_use(x) (bit(zone_map,(x)-FIRSTZONE+1))
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256 |
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257 | #define mark_inode(x) (setbit(inode_map,(x)),changed=1)
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258 | #define unmark_inode(x) (clrbit(inode_map,(x)),changed=1)
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259 |
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260 | #define mark_zone(x) (setbit(zone_map,(x)-FIRSTZONE+1),changed=1)
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261 | #define unmark_zone(x) (clrbit(zone_map,(x)-FIRSTZONE+1),changed=1)
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262 |
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263 | static void leave(int) ATTRIBUTE_NORETURN;
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264 | static void leave(int status)
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265 | {
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266 | if (termios_set)
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267 | tcsetattr(0, TCSANOW, &termios);
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268 | exit(status);
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269 | }
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270 |
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271 | static void die(const char *str)
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272 | {
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273 | bb_error_msg("%s", str);
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274 | leave(8);
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275 | }
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276 |
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277 | /* File-name data */
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278 | enum { MAX_DEPTH = 32 };
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279 | static int name_depth;
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280 | static char *current_name;
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281 | static char *name_component[MAX_DEPTH+1];
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282 |
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283 | /* Wed Feb 9 15:17:06 MST 2000 */
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284 | /* dynamically allocate name_list (instead of making it static) */
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285 | static inline void alloc_current_name(void)
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286 | {
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287 | current_name = xmalloc(MAX_DEPTH * (BUFSIZ + 1));
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288 | current_name[0] = '/';
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289 | current_name[1] = '\0';
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290 | name_component[0] = ¤t_name[0];
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291 | }
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292 |
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293 | #ifdef CONFIG_FEATURE_CLEAN_UP
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294 | /* execute this atexit() to deallocate name_list[] */
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295 | /* piptigger was here */
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296 | static inline void free_current_name(void)
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297 | {
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298 | free(current_name);
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299 | }
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300 | #endif
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301 |
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302 | static void push_filename(const char *name)
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303 | {
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304 | // /dir/dir/dir/file
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305 | // ^ ^ ^
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306 | // [0] [1] [2] <-name_component[i]
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307 | if (name_depth < MAX_DEPTH) {
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308 | int len;
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309 | char *p = name_component[name_depth];
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310 | *p++ = '/';
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311 | len = sprintf(p, "%.*s", namelen, name);
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312 | name_component[name_depth + 1] = p + len;
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313 | }
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314 | name_depth++;
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315 | }
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316 |
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317 | static void pop_filename(void) {
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318 | name_depth--;
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319 | if (name_depth < MAX_DEPTH) {
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320 | *name_component[name_depth] = '\0';
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321 | if (!name_depth) {
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322 | current_name[0] = '/';
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323 | current_name[1] = '\0';
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324 | }
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325 | }
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326 | }
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327 |
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328 | static int ask(const char *string, int def)
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329 | {
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330 | int c;
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331 |
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332 | if (!repair) {
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333 | printf("\n");
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334 | errors_uncorrected = 1;
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335 | return 0;
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336 | }
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337 | if (automatic) {
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338 | printf("\n");
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339 | if (!def)
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340 | errors_uncorrected = 1;
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341 | return def;
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342 | }
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343 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
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344 | for (;;) {
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345 | fflush(stdout);
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346 | if ((c = getchar()) == EOF) {
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347 | if (!def)
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348 | errors_uncorrected = 1;
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349 | return def;
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350 | }
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351 | c = toupper(c);
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352 | if (c == 'Y') {
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353 | def = 1;
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354 | break;
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355 | } else if (c == 'N') {
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356 | def = 0;
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357 | break;
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358 | } else if (c == ' ' || c == '\n')
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359 | break;
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360 | }
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361 | if (def)
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362 | printf("y\n");
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363 | else {
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364 | printf("n\n");
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365 | errors_uncorrected = 1;
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366 | }
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367 | return def;
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368 | }
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369 |
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370 | /*
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371 | * Make certain that we aren't checking a filesystem that is on a
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372 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
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373 | * 1994 Theodore Ts'o. Also licensed under GPL.
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374 | */
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375 | static void check_mount(void)
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376 | {
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377 | FILE *f;
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378 | struct mntent *mnt;
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379 | int cont;
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380 | int fd;
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381 |
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382 | if ((f = setmntent(MOUNTED, "r")) == NULL)
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383 | return;
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384 | while ((mnt = getmntent(f)) != NULL)
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385 | if (strcmp(device_name, mnt->mnt_fsname) == 0)
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386 | break;
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387 | endmntent(f);
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388 | if (!mnt)
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389 | return;
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390 |
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391 | /*
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392 | * If the root is mounted read-only, then /etc/mtab is
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393 | * probably not correct; so we won't issue a warning based on
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394 | * it.
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395 | */
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396 | fd = open(MOUNTED, O_RDWR);
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397 | if (fd < 0 && errno == EROFS)
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398 | return;
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399 | else
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400 | close(fd);
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401 |
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402 | printf("%s is mounted. ", device_name);
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403 | cont = 0;
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404 | if (isatty(0) && isatty(1))
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405 | cont = ask("Do you really want to continue", 0);
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406 | if (!cont) {
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407 | printf("Check aborted\n");
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408 | exit(0);
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409 | }
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410 | return;
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411 | }
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412 |
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413 | /*
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414 | * check_zone_nr checks to see that *nr is a valid zone nr. If it
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415 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
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416 | * if an error was corrected, and returns the zone (0 for no zone
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417 | * or a bad zone-number).
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418 | */
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419 | static int check_zone_nr2(uint32_t *nr, int *corrected)
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420 | {
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421 | const char *msg;
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422 | if (!*nr)
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423 | return 0;
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424 | if (*nr < FIRSTZONE)
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425 | msg = "< FIRSTZONE";
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426 | else if (*nr >= ZONES)
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427 | msg = ">= ZONES";
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428 | else
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429 | return *nr;
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430 | printf("Zone nr %s in file '%s'. ", msg, current_name);
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431 | if (ask("Remove block", 1)) {
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432 | *nr = 0;
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433 | *corrected = 1;
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434 | }
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435 | return 0;
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436 | }
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437 |
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438 | static int check_zone_nr(uint16_t *nr, int *corrected)
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439 | {
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440 | uint32_t nr32 = *nr;
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441 | int r = check_zone_nr2(&nr32, corrected);
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442 | *nr = (uint16_t)nr32;
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443 | return r;
|
---|
444 | }
|
---|
445 |
|
---|
446 | /*
|
---|
447 | * read-block reads block nr into the buffer at addr.
|
---|
448 | */
|
---|
449 | static void read_block(unsigned int nr, char *addr)
|
---|
450 | {
|
---|
451 | if (!nr) {
|
---|
452 | memset(addr, 0, BLOCK_SIZE);
|
---|
453 | return;
|
---|
454 | }
|
---|
455 | if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET)) {
|
---|
456 | printf("%s: unable to seek to block in file '%s'\n",
|
---|
457 | bb_msg_read_error, current_name);
|
---|
458 | errors_uncorrected = 1;
|
---|
459 | memset(addr, 0, BLOCK_SIZE);
|
---|
460 | } else if (BLOCK_SIZE != read(IN, addr, BLOCK_SIZE)) {
|
---|
461 | printf("%s: bad block in file '%s'\n",
|
---|
462 | bb_msg_read_error, current_name);
|
---|
463 | errors_uncorrected = 1;
|
---|
464 | memset(addr, 0, BLOCK_SIZE);
|
---|
465 | }
|
---|
466 | }
|
---|
467 |
|
---|
468 | /*
|
---|
469 | * write_block writes block nr to disk.
|
---|
470 | */
|
---|
471 | static void write_block(unsigned int nr, char *addr)
|
---|
472 | {
|
---|
473 | if (!nr)
|
---|
474 | return;
|
---|
475 | if (nr < FIRSTZONE || nr >= ZONES) {
|
---|
476 | printf("Internal error: trying to write bad block\n"
|
---|
477 | "Write request ignored\n");
|
---|
478 | errors_uncorrected = 1;
|
---|
479 | return;
|
---|
480 | }
|
---|
481 | if (BLOCK_SIZE * nr != lseek(IN, BLOCK_SIZE * nr, SEEK_SET))
|
---|
482 | die("Seek failed in write_block");
|
---|
483 | if (BLOCK_SIZE != write(IN, addr, BLOCK_SIZE)) {
|
---|
484 | printf("%s: bad block in file '%s'\n",
|
---|
485 | bb_msg_write_error, current_name);
|
---|
486 | errors_uncorrected = 1;
|
---|
487 | }
|
---|
488 | }
|
---|
489 |
|
---|
490 | /*
|
---|
491 | * map_block calculates the absolute block nr of a block in a file.
|
---|
492 | * It sets 'changed' if the inode has needed changing, and re-writes
|
---|
493 | * any indirect blocks with errors.
|
---|
494 | */
|
---|
495 | static int map_block(struct minix_inode *inode, unsigned int blknr)
|
---|
496 | {
|
---|
497 | uint16_t ind[BLOCK_SIZE >> 1];
|
---|
498 | uint16_t dind[BLOCK_SIZE >> 1];
|
---|
499 | int blk_chg, block, result;
|
---|
500 |
|
---|
501 | if (blknr < 7)
|
---|
502 | return check_zone_nr(inode->i_zone + blknr, &changed);
|
---|
503 | blknr -= 7;
|
---|
504 | if (blknr < 512) {
|
---|
505 | block = check_zone_nr(inode->i_zone + 7, &changed);
|
---|
506 | read_block(block, (char *) ind);
|
---|
507 | blk_chg = 0;
|
---|
508 | result = check_zone_nr(blknr + ind, &blk_chg);
|
---|
509 | if (blk_chg)
|
---|
510 | write_block(block, (char *) ind);
|
---|
511 | return result;
|
---|
512 | }
|
---|
513 | blknr -= 512;
|
---|
514 | block = check_zone_nr(inode->i_zone + 8, &changed);
|
---|
515 | read_block(block, (char *) dind);
|
---|
516 | blk_chg = 0;
|
---|
517 | result = check_zone_nr(dind + (blknr / 512), &blk_chg);
|
---|
518 | if (blk_chg)
|
---|
519 | write_block(block, (char *) dind);
|
---|
520 | block = result;
|
---|
521 | read_block(block, (char *) ind);
|
---|
522 | blk_chg = 0;
|
---|
523 | result = check_zone_nr(ind + (blknr % 512), &blk_chg);
|
---|
524 | if (blk_chg)
|
---|
525 | write_block(block, (char *) ind);
|
---|
526 | return result;
|
---|
527 | }
|
---|
528 |
|
---|
529 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
530 | static int map_block2(struct minix2_inode *inode, unsigned int blknr)
|
---|
531 | {
|
---|
532 | uint32_t ind[BLOCK_SIZE >> 2];
|
---|
533 | uint32_t dind[BLOCK_SIZE >> 2];
|
---|
534 | uint32_t tind[BLOCK_SIZE >> 2];
|
---|
535 | int blk_chg, block, result;
|
---|
536 |
|
---|
537 | if (blknr < 7)
|
---|
538 | return check_zone_nr2(inode->i_zone + blknr, &changed);
|
---|
539 | blknr -= 7;
|
---|
540 | if (blknr < 256) {
|
---|
541 | block = check_zone_nr2(inode->i_zone + 7, &changed);
|
---|
542 | read_block(block, (char *) ind);
|
---|
543 | blk_chg = 0;
|
---|
544 | result = check_zone_nr2(blknr + ind, &blk_chg);
|
---|
545 | if (blk_chg)
|
---|
546 | write_block(block, (char *) ind);
|
---|
547 | return result;
|
---|
548 | }
|
---|
549 | blknr -= 256;
|
---|
550 | if (blknr >= 256 * 256) {
|
---|
551 | block = check_zone_nr2(inode->i_zone + 8, &changed);
|
---|
552 | read_block(block, (char *) dind);
|
---|
553 | blk_chg = 0;
|
---|
554 | result = check_zone_nr2(dind + blknr / 256, &blk_chg);
|
---|
555 | if (blk_chg)
|
---|
556 | write_block(block, (char *) dind);
|
---|
557 | block = result;
|
---|
558 | read_block(block, (char *) ind);
|
---|
559 | blk_chg = 0;
|
---|
560 | result = check_zone_nr2(ind + blknr % 256, &blk_chg);
|
---|
561 | if (blk_chg)
|
---|
562 | write_block(block, (char *) ind);
|
---|
563 | return result;
|
---|
564 | }
|
---|
565 | blknr -= 256 * 256;
|
---|
566 | block = check_zone_nr2(inode->i_zone + 9, &changed);
|
---|
567 | read_block(block, (char *) tind);
|
---|
568 | blk_chg = 0;
|
---|
569 | result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
|
---|
570 | if (blk_chg)
|
---|
571 | write_block(block, (char *) tind);
|
---|
572 | block = result;
|
---|
573 | read_block(block, (char *) dind);
|
---|
574 | blk_chg = 0;
|
---|
575 | result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
|
---|
576 | if (blk_chg)
|
---|
577 | write_block(block, (char *) dind);
|
---|
578 | block = result;
|
---|
579 | read_block(block, (char *) ind);
|
---|
580 | blk_chg = 0;
|
---|
581 | result = check_zone_nr2(ind + blknr % 256, &blk_chg);
|
---|
582 | if (blk_chg)
|
---|
583 | write_block(block, (char *) ind);
|
---|
584 | return result;
|
---|
585 | }
|
---|
586 | #endif
|
---|
587 |
|
---|
588 | static void write_super_block(void)
|
---|
589 | {
|
---|
590 | /*
|
---|
591 | * Set the state of the filesystem based on whether or not there
|
---|
592 | * are uncorrected errors. The filesystem valid flag is
|
---|
593 | * unconditionally set if we get this far.
|
---|
594 | */
|
---|
595 | Super.s_state |= MINIX_VALID_FS;
|
---|
596 | if (errors_uncorrected)
|
---|
597 | Super.s_state |= MINIX_ERROR_FS;
|
---|
598 | else
|
---|
599 | Super.s_state &= ~MINIX_ERROR_FS;
|
---|
600 |
|
---|
601 | if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
|
---|
602 | die("Seek failed in write_super_block");
|
---|
603 | if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
|
---|
604 | die("Unable to write super-block");
|
---|
605 | }
|
---|
606 |
|
---|
607 | static void write_tables(void)
|
---|
608 | {
|
---|
609 | write_super_block();
|
---|
610 |
|
---|
611 | if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE))
|
---|
612 | die("Unable to write inode map");
|
---|
613 | if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
614 | die("Unable to write zone map");
|
---|
615 | if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE))
|
---|
616 | die("Unable to write inodes");
|
---|
617 | }
|
---|
618 |
|
---|
619 | static void get_dirsize(void)
|
---|
620 | {
|
---|
621 | int block;
|
---|
622 | char blk[BLOCK_SIZE];
|
---|
623 | int size;
|
---|
624 |
|
---|
625 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
626 | if (version2)
|
---|
627 | block = Inode2[ROOT_INO].i_zone[0];
|
---|
628 | else
|
---|
629 | #endif
|
---|
630 | block = Inode[ROOT_INO].i_zone[0];
|
---|
631 | read_block(block, blk);
|
---|
632 | for (size = 16; size < BLOCK_SIZE; size <<= 1) {
|
---|
633 | if (strcmp(blk + size + 2, "..") == 0) {
|
---|
634 | dirsize = size;
|
---|
635 | namelen = size - 2;
|
---|
636 | return;
|
---|
637 | }
|
---|
638 | }
|
---|
639 | /* use defaults */
|
---|
640 | }
|
---|
641 |
|
---|
642 | static void read_superblock(void)
|
---|
643 | {
|
---|
644 | if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
|
---|
645 | die("Seek failed");
|
---|
646 | if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
|
---|
647 | die("Unable to read super block");
|
---|
648 | /* already initialized to:
|
---|
649 | namelen = 14;
|
---|
650 | dirsize = 16;
|
---|
651 | version2 = 0;
|
---|
652 | */
|
---|
653 | if (MAGIC == MINIX_SUPER_MAGIC) {
|
---|
654 | } else if (MAGIC == MINIX_SUPER_MAGIC2) {
|
---|
655 | namelen = 30;
|
---|
656 | dirsize = 32;
|
---|
657 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
658 | } else if (MAGIC == MINIX2_SUPER_MAGIC) {
|
---|
659 | version2 = 1;
|
---|
660 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
|
---|
661 | namelen = 30;
|
---|
662 | dirsize = 32;
|
---|
663 | version2 = 1;
|
---|
664 | #endif
|
---|
665 | } else
|
---|
666 | die("Bad magic number in super-block");
|
---|
667 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
|
---|
668 | die("Only 1k blocks/zones supported");
|
---|
669 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
|
---|
670 | die("Bad s_imap_blocks field in super-block");
|
---|
671 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
|
---|
672 | die("Bad s_zmap_blocks field in super-block");
|
---|
673 | }
|
---|
674 |
|
---|
675 | static void read_tables(void)
|
---|
676 | {
|
---|
677 | inode_map = xzalloc(IMAPS * BLOCK_SIZE);
|
---|
678 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
|
---|
679 | inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
---|
680 | inode_count = xmalloc(INODES + 1);
|
---|
681 | zone_count = xmalloc(ZONES);
|
---|
682 | if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE))
|
---|
683 | die("Unable to read inode map");
|
---|
684 | if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
685 | die("Unable to read zone map");
|
---|
686 | if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE))
|
---|
687 | die("Unable to read inodes");
|
---|
688 | if (NORM_FIRSTZONE != FIRSTZONE) {
|
---|
689 | printf("Warning: Firstzone!=Norm_firstzone\n");
|
---|
690 | errors_uncorrected = 1;
|
---|
691 | }
|
---|
692 | get_dirsize();
|
---|
693 | if (show) {
|
---|
694 | printf("%ld inodes\n"
|
---|
695 | "%ld blocks\n"
|
---|
696 | "Firstdatazone=%ld (%ld)\n"
|
---|
697 | "Zonesize=%d\n"
|
---|
698 | "Maxsize=%ld\n"
|
---|
699 | "Filesystem state=%d\n"
|
---|
700 | "namelen=%d\n\n",
|
---|
701 | INODES,
|
---|
702 | ZONES,
|
---|
703 | FIRSTZONE, NORM_FIRSTZONE,
|
---|
704 | BLOCK_SIZE << ZONESIZE,
|
---|
705 | MAXSIZE,
|
---|
706 | Super.s_state,
|
---|
707 | namelen);
|
---|
708 | }
|
---|
709 | }
|
---|
710 |
|
---|
711 | static struct minix_inode *get_inode(unsigned int nr)
|
---|
712 | {
|
---|
713 | struct minix_inode *inode;
|
---|
714 |
|
---|
715 | if (!nr || nr > INODES)
|
---|
716 | return NULL;
|
---|
717 | total++;
|
---|
718 | inode = Inode + nr;
|
---|
719 | if (!inode_count[nr]) {
|
---|
720 | if (!inode_in_use(nr)) {
|
---|
721 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
722 | "for file '%s'\n", nr, current_name);
|
---|
723 | if (repair) {
|
---|
724 | if (ask("Mark as 'in use'", 1))
|
---|
725 | mark_inode(nr);
|
---|
726 | } else {
|
---|
727 | errors_uncorrected = 1;
|
---|
728 | }
|
---|
729 | }
|
---|
730 | if (S_ISDIR(inode->i_mode))
|
---|
731 | directory++;
|
---|
732 | else if (S_ISREG(inode->i_mode))
|
---|
733 | regular++;
|
---|
734 | else if (S_ISCHR(inode->i_mode))
|
---|
735 | chardev++;
|
---|
736 | else if (S_ISBLK(inode->i_mode))
|
---|
737 | blockdev++;
|
---|
738 | else if (S_ISLNK(inode->i_mode))
|
---|
739 | symlinks++;
|
---|
740 | else if (S_ISSOCK(inode->i_mode));
|
---|
741 | else if (S_ISFIFO(inode->i_mode));
|
---|
742 | else {
|
---|
743 | printf("%s has mode %05o\n", current_name, inode->i_mode);
|
---|
744 | }
|
---|
745 |
|
---|
746 | } else
|
---|
747 | links++;
|
---|
748 | if (!++inode_count[nr]) {
|
---|
749 | printf("Warning: inode count too big\n");
|
---|
750 | inode_count[nr]--;
|
---|
751 | errors_uncorrected = 1;
|
---|
752 | }
|
---|
753 | return inode;
|
---|
754 | }
|
---|
755 |
|
---|
756 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
757 | static struct minix2_inode *get_inode2(unsigned int nr)
|
---|
758 | {
|
---|
759 | struct minix2_inode *inode;
|
---|
760 |
|
---|
761 | if (!nr || nr > INODES)
|
---|
762 | return NULL;
|
---|
763 | total++;
|
---|
764 | inode = Inode2 + nr;
|
---|
765 | if (!inode_count[nr]) {
|
---|
766 | if (!inode_in_use(nr)) {
|
---|
767 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
768 | "for file '%s'\n", nr, current_name);
|
---|
769 | if (repair) {
|
---|
770 | if (ask("Mark as 'in use'", 1))
|
---|
771 | mark_inode(nr);
|
---|
772 | else
|
---|
773 | errors_uncorrected = 1;
|
---|
774 | }
|
---|
775 | }
|
---|
776 | if (S_ISDIR(inode->i_mode))
|
---|
777 | directory++;
|
---|
778 | else if (S_ISREG(inode->i_mode))
|
---|
779 | regular++;
|
---|
780 | else if (S_ISCHR(inode->i_mode))
|
---|
781 | chardev++;
|
---|
782 | else if (S_ISBLK(inode->i_mode))
|
---|
783 | blockdev++;
|
---|
784 | else if (S_ISLNK(inode->i_mode))
|
---|
785 | symlinks++;
|
---|
786 | else if (S_ISSOCK(inode->i_mode));
|
---|
787 | else if (S_ISFIFO(inode->i_mode));
|
---|
788 | else {
|
---|
789 | printf("%s has mode %05o\n", current_name, inode->i_mode);
|
---|
790 | }
|
---|
791 | } else
|
---|
792 | links++;
|
---|
793 | if (!++inode_count[nr]) {
|
---|
794 | printf("Warning: inode count too big\n");
|
---|
795 | inode_count[nr]--;
|
---|
796 | errors_uncorrected = 1;
|
---|
797 | }
|
---|
798 | return inode;
|
---|
799 | }
|
---|
800 | #endif
|
---|
801 |
|
---|
802 | static void check_root(void)
|
---|
803 | {
|
---|
804 | struct minix_inode *inode = Inode + ROOT_INO;
|
---|
805 |
|
---|
806 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
807 | die("Root inode isn't a directory");
|
---|
808 | }
|
---|
809 |
|
---|
810 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
811 | static void check_root2(void)
|
---|
812 | {
|
---|
813 | struct minix2_inode *inode = Inode2 + ROOT_INO;
|
---|
814 |
|
---|
815 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
816 | die("Root inode isn't a directory");
|
---|
817 | }
|
---|
818 | #endif
|
---|
819 |
|
---|
820 | static int add_zone(uint16_t *znr, int *corrected)
|
---|
821 | {
|
---|
822 | int result;
|
---|
823 | int block;
|
---|
824 |
|
---|
825 | result = 0;
|
---|
826 | block = check_zone_nr(znr, corrected);
|
---|
827 | if (!block)
|
---|
828 | return 0;
|
---|
829 | if (zone_count[block]) {
|
---|
830 | printf("Already used block is reused in file '%s'. ",
|
---|
831 | current_name);
|
---|
832 | if (ask("Clear", 1)) {
|
---|
833 | *znr = 0;
|
---|
834 | block = 0;
|
---|
835 | *corrected = 1;
|
---|
836 | return 0;
|
---|
837 | }
|
---|
838 | }
|
---|
839 | if (!zone_in_use(block)) {
|
---|
840 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
841 | block, current_name);
|
---|
842 | if (ask("Correct", 1))
|
---|
843 | mark_zone(block);
|
---|
844 | }
|
---|
845 | if (!++zone_count[block])
|
---|
846 | zone_count[block]--;
|
---|
847 | return block;
|
---|
848 | }
|
---|
849 |
|
---|
850 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
851 | static int add_zone2(uint32_t *znr, int *corrected)
|
---|
852 | {
|
---|
853 | int result;
|
---|
854 | int block;
|
---|
855 |
|
---|
856 | result = 0;
|
---|
857 | block = check_zone_nr2(znr, corrected);
|
---|
858 | if (!block)
|
---|
859 | return 0;
|
---|
860 | if (zone_count[block]) {
|
---|
861 | printf("Already used block is reused in file '%s'. ",
|
---|
862 | current_name);
|
---|
863 | if (ask("Clear", 1)) {
|
---|
864 | *znr = 0;
|
---|
865 | block = 0;
|
---|
866 | *corrected = 1;
|
---|
867 | return 0;
|
---|
868 | }
|
---|
869 | }
|
---|
870 | if (!zone_in_use(block)) {
|
---|
871 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
872 | block, current_name);
|
---|
873 | if (ask("Correct", 1))
|
---|
874 | mark_zone(block);
|
---|
875 | }
|
---|
876 | if (!++zone_count[block])
|
---|
877 | zone_count[block]--;
|
---|
878 | return block;
|
---|
879 | }
|
---|
880 | #endif
|
---|
881 |
|
---|
882 | static void add_zone_ind(uint16_t *znr, int *corrected)
|
---|
883 | {
|
---|
884 | static char blk[BLOCK_SIZE];
|
---|
885 | int i, chg_blk = 0;
|
---|
886 | int block;
|
---|
887 |
|
---|
888 | block = add_zone(znr, corrected);
|
---|
889 | if (!block)
|
---|
890 | return;
|
---|
891 | read_block(block, blk);
|
---|
892 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
893 | add_zone(i + (uint16_t *) blk, &chg_blk);
|
---|
894 | if (chg_blk)
|
---|
895 | write_block(block, blk);
|
---|
896 | }
|
---|
897 |
|
---|
898 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
899 | static void add_zone_ind2(uint32_t *znr, int *corrected)
|
---|
900 | {
|
---|
901 | static char blk[BLOCK_SIZE];
|
---|
902 | int i, chg_blk = 0;
|
---|
903 | int block;
|
---|
904 |
|
---|
905 | block = add_zone2(znr, corrected);
|
---|
906 | if (!block)
|
---|
907 | return;
|
---|
908 | read_block(block, blk);
|
---|
909 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
910 | add_zone2(i + (uint32_t *) blk, &chg_blk);
|
---|
911 | if (chg_blk)
|
---|
912 | write_block(block, blk);
|
---|
913 | }
|
---|
914 | #endif
|
---|
915 |
|
---|
916 | static void add_zone_dind(uint16_t *znr, int *corrected)
|
---|
917 | {
|
---|
918 | static char blk[BLOCK_SIZE];
|
---|
919 | int i, blk_chg = 0;
|
---|
920 | int block;
|
---|
921 |
|
---|
922 | block = add_zone(znr, corrected);
|
---|
923 | if (!block)
|
---|
924 | return;
|
---|
925 | read_block(block, blk);
|
---|
926 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
927 | add_zone_ind(i + (uint16_t *) blk, &blk_chg);
|
---|
928 | if (blk_chg)
|
---|
929 | write_block(block, blk);
|
---|
930 | }
|
---|
931 |
|
---|
932 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
933 | static void add_zone_dind2(uint32_t *znr, int *corrected)
|
---|
934 | {
|
---|
935 | static char blk[BLOCK_SIZE];
|
---|
936 | int i, blk_chg = 0;
|
---|
937 | int block;
|
---|
938 |
|
---|
939 | block = add_zone2(znr, corrected);
|
---|
940 | if (!block)
|
---|
941 | return;
|
---|
942 | read_block(block, blk);
|
---|
943 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
944 | add_zone_ind2(i + (uint32_t *) blk, &blk_chg);
|
---|
945 | if (blk_chg)
|
---|
946 | write_block(block, blk);
|
---|
947 | }
|
---|
948 |
|
---|
949 | static void add_zone_tind2(uint32_t *znr, int *corrected)
|
---|
950 | {
|
---|
951 | static char blk[BLOCK_SIZE];
|
---|
952 | int i, blk_chg = 0;
|
---|
953 | int block;
|
---|
954 |
|
---|
955 | block = add_zone2(znr, corrected);
|
---|
956 | if (!block)
|
---|
957 | return;
|
---|
958 | read_block(block, blk);
|
---|
959 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
960 | add_zone_dind2(i + (uint32_t *) blk, &blk_chg);
|
---|
961 | if (blk_chg)
|
---|
962 | write_block(block, blk);
|
---|
963 | }
|
---|
964 | #endif
|
---|
965 |
|
---|
966 | static void check_zones(unsigned int i)
|
---|
967 | {
|
---|
968 | struct minix_inode *inode;
|
---|
969 |
|
---|
970 | if (!i || i > INODES)
|
---|
971 | return;
|
---|
972 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
973 | return;
|
---|
974 | inode = Inode + i;
|
---|
975 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
|
---|
976 | !S_ISLNK(inode->i_mode)) return;
|
---|
977 | for (i = 0; i < 7; i++)
|
---|
978 | add_zone(i + inode->i_zone, &changed);
|
---|
979 | add_zone_ind(7 + inode->i_zone, &changed);
|
---|
980 | add_zone_dind(8 + inode->i_zone, &changed);
|
---|
981 | }
|
---|
982 |
|
---|
983 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
984 | static void check_zones2(unsigned int i)
|
---|
985 | {
|
---|
986 | struct minix2_inode *inode;
|
---|
987 |
|
---|
988 | if (!i || i > INODES)
|
---|
989 | return;
|
---|
990 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
991 | return;
|
---|
992 | inode = Inode2 + i;
|
---|
993 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
|
---|
994 | && !S_ISLNK(inode->i_mode))
|
---|
995 | return;
|
---|
996 | for (i = 0; i < 7; i++)
|
---|
997 | add_zone2(i + inode->i_zone, &changed);
|
---|
998 | add_zone_ind2(7 + inode->i_zone, &changed);
|
---|
999 | add_zone_dind2(8 + inode->i_zone, &changed);
|
---|
1000 | add_zone_tind2(9 + inode->i_zone, &changed);
|
---|
1001 | }
|
---|
1002 | #endif
|
---|
1003 |
|
---|
1004 | static void check_file(struct minix_inode *dir, unsigned int offset)
|
---|
1005 | {
|
---|
1006 | static char blk[BLOCK_SIZE];
|
---|
1007 | struct minix_inode *inode;
|
---|
1008 | int ino;
|
---|
1009 | char *name;
|
---|
1010 | int block;
|
---|
1011 |
|
---|
1012 | block = map_block(dir, offset / BLOCK_SIZE);
|
---|
1013 | read_block(block, blk);
|
---|
1014 | name = blk + (offset % BLOCK_SIZE) + 2;
|
---|
1015 | ino = *(uint16_t *) (name - 2);
|
---|
1016 | if (ino > INODES) {
|
---|
1017 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
1018 | current_name, namelen, name);
|
---|
1019 | if (ask("Remove", 1)) {
|
---|
1020 | *(uint16_t *) (name - 2) = 0;
|
---|
1021 | write_block(block, blk);
|
---|
1022 | }
|
---|
1023 | ino = 0;
|
---|
1024 | }
|
---|
1025 | push_filename(name);
|
---|
1026 | inode = get_inode(ino);
|
---|
1027 | pop_filename();
|
---|
1028 | if (!offset) {
|
---|
1029 | if (!inode || strcmp(".", name)) {
|
---|
1030 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
1031 | errors_uncorrected = 1;
|
---|
1032 | } else
|
---|
1033 | return;
|
---|
1034 | }
|
---|
1035 | if (offset == dirsize) {
|
---|
1036 | if (!inode || strcmp("..", name)) {
|
---|
1037 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
1038 | errors_uncorrected = 1;
|
---|
1039 | } else
|
---|
1040 | return;
|
---|
1041 | }
|
---|
1042 | if (!inode)
|
---|
1043 | return;
|
---|
1044 | push_filename(name);
|
---|
1045 | if (list) {
|
---|
1046 | if (verbose)
|
---|
1047 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
1048 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
1049 | }
|
---|
1050 | check_zones(ino);
|
---|
1051 | if (inode && S_ISDIR(inode->i_mode))
|
---|
1052 | recursive_check(ino);
|
---|
1053 | pop_filename();
|
---|
1054 | return;
|
---|
1055 | }
|
---|
1056 |
|
---|
1057 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
1058 | static void check_file2(struct minix2_inode *dir, unsigned int offset)
|
---|
1059 | {
|
---|
1060 | static char blk[BLOCK_SIZE];
|
---|
1061 | struct minix2_inode *inode;
|
---|
1062 | int ino;
|
---|
1063 | char *name;
|
---|
1064 | int block;
|
---|
1065 |
|
---|
1066 | block = map_block2(dir, offset / BLOCK_SIZE);
|
---|
1067 | read_block(block, blk);
|
---|
1068 | name = blk + (offset % BLOCK_SIZE) + 2;
|
---|
1069 | ino = *(uint16_t *) (name - 2);
|
---|
1070 | if (ino > INODES) {
|
---|
1071 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
1072 | current_name, namelen, name);
|
---|
1073 | if (ask("Remove", 1)) {
|
---|
1074 | *(uint16_t *) (name - 2) = 0;
|
---|
1075 | write_block(block, blk);
|
---|
1076 | }
|
---|
1077 | ino = 0;
|
---|
1078 | }
|
---|
1079 | push_filename(name);
|
---|
1080 | inode = get_inode2(ino);
|
---|
1081 | pop_filename();
|
---|
1082 | if (!offset) {
|
---|
1083 | if (!inode || strcmp(".", name)) {
|
---|
1084 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
1085 | errors_uncorrected = 1;
|
---|
1086 | } else
|
---|
1087 | return;
|
---|
1088 | }
|
---|
1089 | if (offset == dirsize) {
|
---|
1090 | if (!inode || strcmp("..", name)) {
|
---|
1091 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
1092 | errors_uncorrected = 1;
|
---|
1093 | } else
|
---|
1094 | return;
|
---|
1095 | }
|
---|
1096 | if (!inode)
|
---|
1097 | return;
|
---|
1098 | push_filename(name);
|
---|
1099 | if (list) {
|
---|
1100 | if (verbose)
|
---|
1101 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
1102 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
1103 | }
|
---|
1104 | check_zones2(ino);
|
---|
1105 | if (inode && S_ISDIR(inode->i_mode))
|
---|
1106 | recursive_check2(ino);
|
---|
1107 | pop_filename();
|
---|
1108 | return;
|
---|
1109 | }
|
---|
1110 | #endif
|
---|
1111 |
|
---|
1112 | static void recursive_check(unsigned int ino)
|
---|
1113 | {
|
---|
1114 | struct minix_inode *dir;
|
---|
1115 | unsigned int offset;
|
---|
1116 |
|
---|
1117 | dir = Inode + ino;
|
---|
1118 | if (!S_ISDIR(dir->i_mode))
|
---|
1119 | die("Internal error");
|
---|
1120 | if (dir->i_size < 2 * dirsize) {
|
---|
1121 | printf("%s: bad directory: size<32", current_name);
|
---|
1122 | errors_uncorrected = 1;
|
---|
1123 | }
|
---|
1124 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
1125 | check_file(dir, offset);
|
---|
1126 | }
|
---|
1127 |
|
---|
1128 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
1129 | static void recursive_check2(unsigned int ino)
|
---|
1130 | {
|
---|
1131 | struct minix2_inode *dir;
|
---|
1132 | unsigned int offset;
|
---|
1133 |
|
---|
1134 | dir = Inode2 + ino;
|
---|
1135 | if (!S_ISDIR(dir->i_mode))
|
---|
1136 | die("Internal error");
|
---|
1137 | if (dir->i_size < 2 * dirsize) {
|
---|
1138 | printf("%s: bad directory: size<32", current_name);
|
---|
1139 | errors_uncorrected = 1;
|
---|
1140 | }
|
---|
1141 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
1142 | check_file2(dir, offset);
|
---|
1143 | }
|
---|
1144 | #endif
|
---|
1145 |
|
---|
1146 | static int bad_zone(int i)
|
---|
1147 | {
|
---|
1148 | char buffer[1024];
|
---|
1149 |
|
---|
1150 | if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET))
|
---|
1151 | die("Seek failed in bad_zone");
|
---|
1152 | return (BLOCK_SIZE != read(IN, buffer, BLOCK_SIZE));
|
---|
1153 | }
|
---|
1154 |
|
---|
1155 | static void check_counts(void)
|
---|
1156 | {
|
---|
1157 | int i;
|
---|
1158 |
|
---|
1159 | for (i = 1; i <= INODES; i++) {
|
---|
1160 | if (warn_mode && Inode[i].i_mode && !inode_in_use(i)) {
|
---|
1161 | printf("Inode %d has non-zero mode. ", i);
|
---|
1162 | if (ask("Clear", 1)) {
|
---|
1163 | Inode[i].i_mode = 0;
|
---|
1164 | changed = 1;
|
---|
1165 | }
|
---|
1166 | }
|
---|
1167 | if (!inode_count[i]) {
|
---|
1168 | if (!inode_in_use(i))
|
---|
1169 | continue;
|
---|
1170 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
1171 | if (ask("Clear", 1))
|
---|
1172 | unmark_inode(i);
|
---|
1173 | continue;
|
---|
1174 | }
|
---|
1175 | if (!inode_in_use(i)) {
|
---|
1176 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
1177 | if (ask("Set", 1))
|
---|
1178 | mark_inode(i);
|
---|
1179 | }
|
---|
1180 | if (Inode[i].i_nlinks != inode_count[i]) {
|
---|
1181 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
1182 | i, Inode[i].i_mode, Inode[i].i_nlinks, inode_count[i]);
|
---|
1183 | if (ask("Set i_nlinks to count", 1)) {
|
---|
1184 | Inode[i].i_nlinks = inode_count[i];
|
---|
1185 | changed = 1;
|
---|
1186 | }
|
---|
1187 | }
|
---|
1188 | }
|
---|
1189 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
1190 | if (zone_in_use(i) == zone_count[i])
|
---|
1191 | continue;
|
---|
1192 | if (!zone_count[i]) {
|
---|
1193 | if (bad_zone(i))
|
---|
1194 | continue;
|
---|
1195 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
1196 | if (ask("Unmark", 1))
|
---|
1197 | unmark_zone(i);
|
---|
1198 | continue;
|
---|
1199 | }
|
---|
1200 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
1201 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
1202 | }
|
---|
1203 | }
|
---|
1204 |
|
---|
1205 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
1206 | static void check_counts2(void)
|
---|
1207 | {
|
---|
1208 | int i;
|
---|
1209 |
|
---|
1210 | for (i = 1; i <= INODES; i++) {
|
---|
1211 | if (warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
|
---|
1212 | printf("Inode %d has non-zero mode. ", i);
|
---|
1213 | if (ask("Clear", 1)) {
|
---|
1214 | Inode2[i].i_mode = 0;
|
---|
1215 | changed = 1;
|
---|
1216 | }
|
---|
1217 | }
|
---|
1218 | if (!inode_count[i]) {
|
---|
1219 | if (!inode_in_use(i))
|
---|
1220 | continue;
|
---|
1221 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
1222 | if (ask("Clear", 1))
|
---|
1223 | unmark_inode(i);
|
---|
1224 | continue;
|
---|
1225 | }
|
---|
1226 | if (!inode_in_use(i)) {
|
---|
1227 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
1228 | if (ask("Set", 1))
|
---|
1229 | mark_inode(i);
|
---|
1230 | }
|
---|
1231 | if (Inode2[i].i_nlinks != inode_count[i]) {
|
---|
1232 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
1233 | i, Inode2[i].i_mode, Inode2[i].i_nlinks,
|
---|
1234 | inode_count[i]);
|
---|
1235 | if (ask("Set i_nlinks to count", 1)) {
|
---|
1236 | Inode2[i].i_nlinks = inode_count[i];
|
---|
1237 | changed = 1;
|
---|
1238 | }
|
---|
1239 | }
|
---|
1240 | }
|
---|
1241 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
1242 | if (zone_in_use(i) == zone_count[i])
|
---|
1243 | continue;
|
---|
1244 | if (!zone_count[i]) {
|
---|
1245 | if (bad_zone(i))
|
---|
1246 | continue;
|
---|
1247 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
1248 | if (ask("Unmark", 1))
|
---|
1249 | unmark_zone(i);
|
---|
1250 | continue;
|
---|
1251 | }
|
---|
1252 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
1253 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
1254 | }
|
---|
1255 | }
|
---|
1256 | #endif
|
---|
1257 |
|
---|
1258 | static void check(void)
|
---|
1259 | {
|
---|
1260 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
1261 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
1262 | check_zones(ROOT_INO);
|
---|
1263 | recursive_check(ROOT_INO);
|
---|
1264 | check_counts();
|
---|
1265 | }
|
---|
1266 |
|
---|
1267 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
1268 | static void check2(void)
|
---|
1269 | {
|
---|
1270 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
1271 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
1272 | check_zones2(ROOT_INO);
|
---|
1273 | recursive_check2(ROOT_INO);
|
---|
1274 | check_counts2();
|
---|
1275 | }
|
---|
1276 | #endif
|
---|
1277 |
|
---|
1278 | int fsck_minix_main(int argc, char **argv)
|
---|
1279 | {
|
---|
1280 | struct termios tmp;
|
---|
1281 | int retcode = 0;
|
---|
1282 |
|
---|
1283 | alloc_current_name();
|
---|
1284 | #ifdef CONFIG_FEATURE_CLEAN_UP
|
---|
1285 | /* Don't bother to free memory. Exit does
|
---|
1286 | * that automagically, so we can save a few bytes */
|
---|
1287 | atexit(free_current_name);
|
---|
1288 | #endif
|
---|
1289 |
|
---|
1290 | if (INODE_SIZE * MINIX_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
1291 | die("Bad inode size");
|
---|
1292 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
1293 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
1294 | die("Bad v2 inode size");
|
---|
1295 | #endif
|
---|
1296 | while (argc-- > 1) {
|
---|
1297 | argv++;
|
---|
1298 | if (argv[0][0] != '-') {
|
---|
1299 | if (device_name)
|
---|
1300 | bb_show_usage();
|
---|
1301 | else
|
---|
1302 | device_name = argv[0];
|
---|
1303 | } else
|
---|
1304 | while (*++argv[0])
|
---|
1305 | switch (argv[0][0]) {
|
---|
1306 | case 'l':
|
---|
1307 | list = 1;
|
---|
1308 | break;
|
---|
1309 | case 'a':
|
---|
1310 | automatic = 1;
|
---|
1311 | repair = 1;
|
---|
1312 | break;
|
---|
1313 | case 'r':
|
---|
1314 | automatic = 0;
|
---|
1315 | repair = 1;
|
---|
1316 | break;
|
---|
1317 | case 'v':
|
---|
1318 | verbose = 1;
|
---|
1319 | break;
|
---|
1320 | case 's':
|
---|
1321 | show = 1;
|
---|
1322 | break;
|
---|
1323 | case 'm':
|
---|
1324 | warn_mode = 1;
|
---|
1325 | break;
|
---|
1326 | case 'f':
|
---|
1327 | force = 1;
|
---|
1328 | break;
|
---|
1329 | default:
|
---|
1330 | bb_show_usage();
|
---|
1331 | }
|
---|
1332 | }
|
---|
1333 | if (!device_name)
|
---|
1334 | bb_show_usage();
|
---|
1335 | check_mount(); /* trying to check a mounted filesystem? */
|
---|
1336 | if (repair && !automatic) {
|
---|
1337 | if (!isatty(0) || !isatty(1))
|
---|
1338 | die("Need terminal for interactive repairs");
|
---|
1339 | }
|
---|
1340 | IN = open(device_name, repair ? O_RDWR : O_RDONLY);
|
---|
1341 | if (IN < 0){
|
---|
1342 | printf("Unable to open device '%s'\n", device_name);
|
---|
1343 | leave(8);
|
---|
1344 | }
|
---|
1345 | sync(); /* paranoia? */
|
---|
1346 | read_superblock();
|
---|
1347 |
|
---|
1348 | /*
|
---|
1349 | * Determine whether or not we should continue with the checking.
|
---|
1350 | * This is based on the status of the filesystem valid and error
|
---|
1351 | * flags and whether or not the -f switch was specified on the
|
---|
1352 | * command line.
|
---|
1353 | */
|
---|
1354 | printf("%s, %s\n", bb_applet_name, program_version);
|
---|
1355 | if (!(Super.s_state & MINIX_ERROR_FS) &&
|
---|
1356 | (Super.s_state & MINIX_VALID_FS) && !force) {
|
---|
1357 | if (repair)
|
---|
1358 | printf("%s is clean, check is skipped\n", device_name);
|
---|
1359 | return retcode;
|
---|
1360 | } else if (force)
|
---|
1361 | printf("Forcing filesystem check on %s\n", device_name);
|
---|
1362 | else if (repair)
|
---|
1363 | printf("Filesystem on %s is dirty, needs checking\n",
|
---|
1364 | device_name);
|
---|
1365 |
|
---|
1366 | read_tables();
|
---|
1367 |
|
---|
1368 | if (repair && !automatic) {
|
---|
1369 | tcgetattr(0, &termios);
|
---|
1370 | tmp = termios;
|
---|
1371 | tmp.c_lflag &= ~(ICANON | ECHO);
|
---|
1372 | tcsetattr(0, TCSANOW, &tmp);
|
---|
1373 | termios_set = 1;
|
---|
1374 | }
|
---|
1375 | #ifdef CONFIG_FEATURE_MINIX2
|
---|
1376 | if (version2) {
|
---|
1377 | check_root2();
|
---|
1378 | check2();
|
---|
1379 | } else
|
---|
1380 | #endif
|
---|
1381 | {
|
---|
1382 | check_root();
|
---|
1383 | check();
|
---|
1384 | }
|
---|
1385 | if (verbose) {
|
---|
1386 | int i, free_cnt;
|
---|
1387 |
|
---|
1388 | for (i = 1, free_cnt = 0; i <= INODES; i++)
|
---|
1389 | if (!inode_in_use(i))
|
---|
1390 | free_cnt++;
|
---|
1391 | printf("\n%6ld inodes used (%ld%%)\n", (INODES - free_cnt),
|
---|
1392 | 100 * (INODES - free_cnt) / INODES);
|
---|
1393 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
|
---|
1394 | if (!zone_in_use(i))
|
---|
1395 | free_cnt++;
|
---|
1396 | printf("%6ld zones used (%ld%%)\n\n"
|
---|
1397 | "%6d regular files\n"
|
---|
1398 | "%6d directories\n"
|
---|
1399 | "%6d character device files\n"
|
---|
1400 | "%6d block device files\n"
|
---|
1401 | "%6d links\n"
|
---|
1402 | "%6d symbolic links\n"
|
---|
1403 | "------\n"
|
---|
1404 | "%6d files\n",
|
---|
1405 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
|
---|
1406 | regular, directory, chardev, blockdev,
|
---|
1407 | links - 2 * directory + 1, symlinks,
|
---|
1408 | total - 2 * directory + 1);
|
---|
1409 | }
|
---|
1410 | if (changed) {
|
---|
1411 | write_tables();
|
---|
1412 | printf("FILE SYSTEM HAS BEEN CHANGED\n");
|
---|
1413 | sync();
|
---|
1414 | } else if (repair)
|
---|
1415 | write_super_block();
|
---|
1416 |
|
---|
1417 | if (repair && !automatic)
|
---|
1418 | tcsetattr(0, TCSANOW, &termios);
|
---|
1419 |
|
---|
1420 | if (changed)
|
---|
1421 | retcode += 3;
|
---|
1422 | if (errors_uncorrected)
|
---|
1423 | retcode += 4;
|
---|
1424 | return retcode;
|
---|
1425 | }
|
---|