1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * mkfs.c - make a linux (minix) file-system.
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4 | *
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5 | * (C) 1991 Linus Torvalds.
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6 | *
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7 | * Licensed under GPLv2, see file LICENSE in this source tree.
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8 | */
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9 |
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10 | /*
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11 | * DD.MM.YY
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12 | *
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13 | * 24.11.91 - Time began. Used the fsck sources to get started.
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14 | *
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15 | * 25.11.91 - Corrected some bugs. Added support for ".badblocks"
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16 | * The algorithm for ".badblocks" is a bit weird, but
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17 | * it should work. Oh, well.
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18 | *
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19 | * 25.01.92 - Added the -l option for getting the list of bad blocks
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20 | * out of a named file. (Dave Rivers, rivers@ponds.uucp)
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21 | *
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22 | * 28.02.92 - Added %-information when using -c.
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23 | *
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24 | * 28.02.93 - Added support for other namelengths than the original
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25 | * 14 characters so that I can test the new kernel routines..
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26 | *
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27 | * 09.10.93 - Make exit status conform to that required by fsutil
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28 | * (Rik Faith, faith@cs.unc.edu)
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29 | *
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30 | * 31.10.93 - Added inode request feature, for backup floppies: use
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31 | * 32 inodes, for a news partition use more.
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32 | * (Scott Heavner, sdh@po.cwru.edu)
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33 | *
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34 | * 03.01.94 - Added support for file system valid flag.
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35 | * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
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36 | *
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37 | * 30.10.94 - added support for v2 filesystem
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38 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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39 | *
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40 | * 09.11.94 - Added test to prevent overwrite of mounted fs adapted
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41 | * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
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42 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
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43 | *
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44 | * 03.20.95 - Clear first 512 bytes of filesystem to make certain that
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45 | * the filesystem is not misidentified as a MS-DOS FAT filesystem.
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46 | * (Daniel Quinlan, quinlan@yggdrasil.com)
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47 | *
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48 | * 02.07.96 - Added small patch from Russell King to make the program a
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49 | * good deal more portable (janl@math.uio.no)
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50 | *
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51 | * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks]
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52 | *
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53 | * -c for readability checking (SLOW!)
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54 | * -l for getting a list of bad blocks from a file.
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55 | * -n for namelength (currently the kernel only uses 14 or 30)
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56 | * -i for number of inodes
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57 | * -v for v2 filesystem
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58 | *
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59 | * The device may be a block device or a image of one, but this isn't
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60 | * enforced (but it's not much fun on a character device :-).
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61 | *
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62 | * Modified for BusyBox by Erik Andersen <andersen@debian.org> --
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63 | * removed getopt based parser and added a hand rolled one.
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64 | */
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65 |
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66 | //usage:#define mkfs_minix_trivial_usage
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67 | //usage: "[-c | -l FILE] [-nXX] [-iXX] BLOCKDEV [KBYTES]"
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68 | //usage:#define mkfs_minix_full_usage "\n\n"
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69 | //usage: "Make a MINIX filesystem\n"
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70 | //usage: "\n -c Check device for bad blocks"
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71 | //usage: "\n -n [14|30] Maximum length of filenames"
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72 | //usage: "\n -i INODES Number of inodes for the filesystem"
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73 | //usage: "\n -l FILE Read bad blocks list from FILE"
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74 | //usage: "\n -v Make version 2 filesystem"
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75 |
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76 | #include "libbb.h"
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77 | #include <mntent.h>
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78 |
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79 | #include "minix.h"
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80 |
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81 | /* Store the very same times/uids/gids for image consistency */
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82 | #if 1
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83 | # define CUR_TIME 0
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84 | # define GETUID 0
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85 | # define GETGID 0
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86 | #else
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87 | /* Was using this. Is it useful? NB: this will break testsuite */
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88 | # define CUR_TIME time(NULL)
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89 | # define GETUID getuid()
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90 | # define GETGID getgid()
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91 | #endif
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92 |
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93 | enum {
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94 | MAX_GOOD_BLOCKS = 512,
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95 | TEST_BUFFER_BLOCKS = 16,
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96 | };
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97 |
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98 | #if !ENABLE_FEATURE_MINIX2
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99 | enum { version2 = 0 };
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100 | #endif
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101 |
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102 | enum { dev_fd = 3 };
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103 |
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104 | struct globals {
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105 | #if ENABLE_FEATURE_MINIX2
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106 | smallint version2;
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107 | #define version2 G.version2
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108 | #endif
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109 | char *device_name;
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110 | uint32_t total_blocks;
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111 | int badblocks;
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112 | int namelen;
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113 | int dirsize;
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114 | int magic;
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115 | char *inode_buffer;
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116 | char *inode_map;
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117 | char *zone_map;
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118 | int used_good_blocks;
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119 | unsigned long req_nr_inodes;
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120 | unsigned currently_testing;
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121 |
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122 | char root_block[BLOCK_SIZE];
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123 | char superblock_buffer[BLOCK_SIZE];
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124 | char boot_block_buffer[512];
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125 | unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
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126 | /* check_blocks(): buffer[] was the biggest static in entire bbox */
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127 | char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
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128 |
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129 | unsigned short ind_block1[BLOCK_SIZE >> 1];
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130 | unsigned short dind_block1[BLOCK_SIZE >> 1];
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131 | unsigned long ind_block2[BLOCK_SIZE >> 2];
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132 | unsigned long dind_block2[BLOCK_SIZE >> 2];
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133 | };
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134 | #define G (*ptr_to_globals)
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135 | #define INIT_G() do { \
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136 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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137 | } while (0)
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138 |
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139 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
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140 | {
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141 | return (size + n-1) / n;
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142 | }
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143 |
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144 | #define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1)
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145 | #define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1)
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146 |
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147 | #define SB (*(struct minix_superblock*)G.superblock_buffer)
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148 |
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149 | #define SB_INODES (SB.s_ninodes)
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150 | #define SB_IMAPS (SB.s_imap_blocks)
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151 | #define SB_ZMAPS (SB.s_zmap_blocks)
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152 | #define SB_FIRSTZONE (SB.s_firstdatazone)
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153 | #define SB_ZONE_SIZE (SB.s_log_zone_size)
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154 | #define SB_MAXSIZE (SB.s_max_size)
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155 | #define SB_MAGIC (SB.s_magic)
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156 |
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157 | #if !ENABLE_FEATURE_MINIX2
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158 | # define SB_ZONES (SB.s_nzones)
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159 | # define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
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160 | #else
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161 | # define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones)
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162 | # define INODE_BLOCKS div_roundup(SB_INODES, \
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163 | (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
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164 | #endif
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165 |
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166 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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167 | #define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
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168 |
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169 | /* Before you ask "where they come from?": */
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170 | /* setbit/clrbit are supplied by sys/param.h */
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171 |
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172 | static int minix_bit(const char* a, unsigned i)
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173 | {
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174 | return a[i >> 3] & (1<<(i & 7));
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175 | }
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176 |
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177 | static void minix_setbit(char *a, unsigned i)
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178 | {
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179 | setbit(a, i);
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180 | }
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181 | static void minix_clrbit(char *a, unsigned i)
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182 | {
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183 | clrbit(a, i);
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184 | }
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185 |
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186 | /* Note: do not assume 0/1, it is 0/nonzero */
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187 | #define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1)
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188 | /*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/
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189 |
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190 | #define mark_inode(x) minix_setbit(G.inode_map,(x))
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191 | #define unmark_inode(x) minix_clrbit(G.inode_map,(x))
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192 | #define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1)
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193 | #define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1)
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194 |
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195 | #ifndef BLKGETSIZE
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196 | # define BLKGETSIZE _IO(0x12,96) /* return device size */
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197 | #endif
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198 |
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199 |
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200 | static long valid_offset(int fd, int offset)
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201 | {
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202 | char ch;
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203 |
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204 | if (lseek(fd, offset, SEEK_SET) < 0)
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205 | return 0;
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206 | if (read(fd, &ch, 1) < 1)
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207 | return 0;
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208 | return 1;
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209 | }
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210 |
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211 | static int count_blocks(int fd)
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212 | {
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213 | int high, low;
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214 |
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215 | low = 0;
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216 | for (high = 1; valid_offset(fd, high); high *= 2)
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217 | low = high;
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218 |
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219 | while (low < high - 1) {
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220 | const int mid = (low + high) / 2;
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221 |
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222 | if (valid_offset(fd, mid))
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223 | low = mid;
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224 | else
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225 | high = mid;
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226 | }
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227 | valid_offset(fd, 0);
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228 | return (low + 1);
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229 | }
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230 |
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231 | static int get_size(const char *file)
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232 | {
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233 | int fd;
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234 | long size;
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235 |
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236 | fd = xopen(file, O_RDWR);
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237 | if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
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238 | close(fd);
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239 | return (size * 512);
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240 | }
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241 |
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242 | size = count_blocks(fd);
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243 | close(fd);
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244 | return size;
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245 | }
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246 |
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247 | static void write_tables(void)
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248 | {
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249 | /* Mark the superblock valid. */
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250 | SB.s_state |= MINIX_VALID_FS;
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251 | SB.s_state &= ~MINIX_ERROR_FS;
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252 |
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253 | msg_eol = "seek to 0 failed";
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254 | xlseek(dev_fd, 0, SEEK_SET);
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255 |
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256 | msg_eol = "can't clear boot sector";
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257 | xwrite(dev_fd, G.boot_block_buffer, 512);
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258 |
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259 | msg_eol = "seek to BLOCK_SIZE failed";
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260 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
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261 |
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262 | msg_eol = "can't write superblock";
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263 | xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE);
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264 |
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265 | msg_eol = "can't write inode map";
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266 | xwrite(dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
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267 |
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268 | msg_eol = "can't write zone map";
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269 | xwrite(dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
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270 |
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271 | msg_eol = "can't write inodes";
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272 | xwrite(dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
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273 |
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274 | msg_eol = "\n";
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275 | }
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276 |
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277 | static void write_block(int blk, char *buffer)
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278 | {
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279 | xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET);
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280 | xwrite(dev_fd, buffer, BLOCK_SIZE);
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281 | }
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282 |
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283 | static int get_free_block(void)
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284 | {
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285 | int blk;
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286 |
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287 | if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
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288 | bb_error_msg_and_die("too many bad blocks");
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289 | if (G.used_good_blocks)
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290 | blk = G.good_blocks_table[G.used_good_blocks - 1] + 1;
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291 | else
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292 | blk = SB_FIRSTZONE;
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293 | while (blk < SB_ZONES && zone_in_use(blk))
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294 | blk++;
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295 | if (blk >= SB_ZONES)
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296 | bb_error_msg_and_die("not enough good blocks");
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297 | G.good_blocks_table[G.used_good_blocks] = blk;
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298 | G.used_good_blocks++;
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299 | return blk;
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300 | }
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301 |
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302 | static void mark_good_blocks(void)
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303 | {
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304 | int blk;
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305 |
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306 | for (blk = 0; blk < G.used_good_blocks; blk++)
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307 | mark_zone(G.good_blocks_table[blk]);
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308 | }
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309 |
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310 | static int next(int zone)
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311 | {
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312 | if (!zone)
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313 | zone = SB_FIRSTZONE - 1;
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314 | while (++zone < SB_ZONES)
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315 | if (zone_in_use(zone))
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316 | return zone;
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317 | return 0;
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318 | }
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319 |
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320 | static void make_bad_inode(void)
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321 | {
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322 | struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
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323 | int i, j, zone;
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324 | int ind = 0, dind = 0;
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325 | /* moved to globals to reduce stack usage
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326 | unsigned short ind_block[BLOCK_SIZE >> 1];
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327 | unsigned short dind_block[BLOCK_SIZE >> 1];
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328 | */
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329 | #define ind_block (G.ind_block1)
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330 | #define dind_block (G.dind_block1)
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331 |
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332 | #define NEXT_BAD (zone = next(zone))
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333 |
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334 | if (!G.badblocks)
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335 | return;
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336 | mark_inode(MINIX_BAD_INO);
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337 | inode->i_nlinks = 1;
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338 | /* BTW, setting this makes all images different */
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339 | /* it's harder to check for bugs then - diff isn't helpful :(... */
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340 | inode->i_time = CUR_TIME;
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341 | inode->i_mode = S_IFREG + 0000;
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342 | inode->i_size = G.badblocks * BLOCK_SIZE;
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343 | zone = next(0);
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344 | for (i = 0; i < 7; i++) {
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345 | inode->i_zone[i] = zone;
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346 | if (!NEXT_BAD)
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347 | goto end_bad;
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348 | }
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349 | inode->i_zone[7] = ind = get_free_block();
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350 | memset(ind_block, 0, BLOCK_SIZE);
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351 | for (i = 0; i < 512; i++) {
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352 | ind_block[i] = zone;
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353 | if (!NEXT_BAD)
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354 | goto end_bad;
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355 | }
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356 | inode->i_zone[8] = dind = get_free_block();
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357 | memset(dind_block, 0, BLOCK_SIZE);
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358 | for (i = 0; i < 512; i++) {
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359 | write_block(ind, (char *) ind_block);
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360 | dind_block[i] = ind = get_free_block();
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361 | memset(ind_block, 0, BLOCK_SIZE);
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362 | for (j = 0; j < 512; j++) {
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363 | ind_block[j] = zone;
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364 | if (!NEXT_BAD)
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365 | goto end_bad;
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366 | }
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367 | }
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368 | bb_error_msg_and_die("too many bad blocks");
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369 | end_bad:
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370 | if (ind)
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371 | write_block(ind, (char *) ind_block);
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372 | if (dind)
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373 | write_block(dind, (char *) dind_block);
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374 | #undef ind_block
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375 | #undef dind_block
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376 | }
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377 |
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378 | #if ENABLE_FEATURE_MINIX2
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379 | static void make_bad_inode2(void)
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380 | {
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381 | struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
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382 | int i, j, zone;
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383 | int ind = 0, dind = 0;
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384 | /* moved to globals to reduce stack usage
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385 | unsigned long ind_block[BLOCK_SIZE >> 2];
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386 | unsigned long dind_block[BLOCK_SIZE >> 2];
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387 | */
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388 | #define ind_block (G.ind_block2)
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389 | #define dind_block (G.dind_block2)
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390 |
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391 | if (!G.badblocks)
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392 | return;
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393 | mark_inode(MINIX_BAD_INO);
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394 | inode->i_nlinks = 1;
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395 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
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396 | inode->i_mode = S_IFREG + 0000;
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397 | inode->i_size = G.badblocks * BLOCK_SIZE;
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398 | zone = next(0);
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399 | for (i = 0; i < 7; i++) {
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400 | inode->i_zone[i] = zone;
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401 | if (!NEXT_BAD)
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402 | goto end_bad;
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403 | }
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404 | inode->i_zone[7] = ind = get_free_block();
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405 | memset(ind_block, 0, BLOCK_SIZE);
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406 | for (i = 0; i < 256; i++) {
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407 | ind_block[i] = zone;
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408 | if (!NEXT_BAD)
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409 | goto end_bad;
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410 | }
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411 | inode->i_zone[8] = dind = get_free_block();
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412 | memset(dind_block, 0, BLOCK_SIZE);
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413 | for (i = 0; i < 256; i++) {
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414 | write_block(ind, (char *) ind_block);
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415 | dind_block[i] = ind = get_free_block();
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416 | memset(ind_block, 0, BLOCK_SIZE);
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417 | for (j = 0; j < 256; j++) {
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418 | ind_block[j] = zone;
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419 | if (!NEXT_BAD)
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420 | goto end_bad;
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421 | }
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422 | }
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423 | /* Could make triple indirect block here */
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424 | bb_error_msg_and_die("too many bad blocks");
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425 | end_bad:
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426 | if (ind)
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427 | write_block(ind, (char *) ind_block);
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428 | if (dind)
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429 | write_block(dind, (char *) dind_block);
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430 | #undef ind_block
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431 | #undef dind_block
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432 | }
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433 | #else
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434 | void make_bad_inode2(void);
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435 | #endif
|
---|
436 |
|
---|
437 | static void make_root_inode(void)
|
---|
438 | {
|
---|
439 | struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
|
---|
440 |
|
---|
441 | mark_inode(MINIX_ROOT_INO);
|
---|
442 | inode->i_zone[0] = get_free_block();
|
---|
443 | inode->i_nlinks = 2;
|
---|
444 | inode->i_time = CUR_TIME;
|
---|
445 | if (G.badblocks)
|
---|
446 | inode->i_size = 3 * G.dirsize;
|
---|
447 | else {
|
---|
448 | G.root_block[2 * G.dirsize] = '\0';
|
---|
449 | G.root_block[2 * G.dirsize + 1] = '\0';
|
---|
450 | inode->i_size = 2 * G.dirsize;
|
---|
451 | }
|
---|
452 | inode->i_mode = S_IFDIR + 0755;
|
---|
453 | inode->i_uid = GETUID;
|
---|
454 | if (inode->i_uid)
|
---|
455 | inode->i_gid = GETGID;
|
---|
456 | write_block(inode->i_zone[0], G.root_block);
|
---|
457 | }
|
---|
458 |
|
---|
459 | #if ENABLE_FEATURE_MINIX2
|
---|
460 | static void make_root_inode2(void)
|
---|
461 | {
|
---|
462 | struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
|
---|
463 |
|
---|
464 | mark_inode(MINIX_ROOT_INO);
|
---|
465 | inode->i_zone[0] = get_free_block();
|
---|
466 | inode->i_nlinks = 2;
|
---|
467 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
|
---|
468 | if (G.badblocks)
|
---|
469 | inode->i_size = 3 * G.dirsize;
|
---|
470 | else {
|
---|
471 | G.root_block[2 * G.dirsize] = '\0';
|
---|
472 | G.root_block[2 * G.dirsize + 1] = '\0';
|
---|
473 | inode->i_size = 2 * G.dirsize;
|
---|
474 | }
|
---|
475 | inode->i_mode = S_IFDIR + 0755;
|
---|
476 | inode->i_uid = GETUID;
|
---|
477 | if (inode->i_uid)
|
---|
478 | inode->i_gid = GETGID;
|
---|
479 | write_block(inode->i_zone[0], G.root_block);
|
---|
480 | }
|
---|
481 | #else
|
---|
482 | void make_root_inode2(void);
|
---|
483 | #endif
|
---|
484 |
|
---|
485 | /*
|
---|
486 | * Perform a test of a block; return the number of
|
---|
487 | * blocks readable.
|
---|
488 | */
|
---|
489 | static size_t do_check(char *buffer, size_t try, unsigned current_block)
|
---|
490 | {
|
---|
491 | ssize_t got;
|
---|
492 |
|
---|
493 | /* Seek to the correct loc. */
|
---|
494 | msg_eol = "seek failed during testing of blocks";
|
---|
495 | xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
|
---|
496 | msg_eol = "\n";
|
---|
497 |
|
---|
498 | /* Try the read */
|
---|
499 | got = read(dev_fd, buffer, try * BLOCK_SIZE);
|
---|
500 | if (got < 0)
|
---|
501 | got = 0;
|
---|
502 | try = ((size_t)got) / BLOCK_SIZE;
|
---|
503 |
|
---|
504 | if (got & (BLOCK_SIZE - 1))
|
---|
505 | fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try));
|
---|
506 | return try;
|
---|
507 | }
|
---|
508 |
|
---|
509 | static void alarm_intr(int alnum UNUSED_PARAM)
|
---|
510 | {
|
---|
511 | if (G.currently_testing >= SB_ZONES)
|
---|
512 | return;
|
---|
513 | signal(SIGALRM, alarm_intr);
|
---|
514 | alarm(5);
|
---|
515 | if (!G.currently_testing)
|
---|
516 | return;
|
---|
517 | printf("%d ...", G.currently_testing);
|
---|
518 | fflush_all();
|
---|
519 | }
|
---|
520 |
|
---|
521 | static void check_blocks(void)
|
---|
522 | {
|
---|
523 | size_t try, got;
|
---|
524 |
|
---|
525 | G.currently_testing = 0;
|
---|
526 | signal(SIGALRM, alarm_intr);
|
---|
527 | alarm(5);
|
---|
528 | while (G.currently_testing < SB_ZONES) {
|
---|
529 | msg_eol = "seek failed in check_blocks";
|
---|
530 | xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
|
---|
531 | msg_eol = "\n";
|
---|
532 | try = TEST_BUFFER_BLOCKS;
|
---|
533 | if (G.currently_testing + try > SB_ZONES)
|
---|
534 | try = SB_ZONES - G.currently_testing;
|
---|
535 | got = do_check(G.check_blocks_buffer, try, G.currently_testing);
|
---|
536 | G.currently_testing += got;
|
---|
537 | if (got == try)
|
---|
538 | continue;
|
---|
539 | if (G.currently_testing < SB_FIRSTZONE)
|
---|
540 | bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
|
---|
541 | mark_zone(G.currently_testing);
|
---|
542 | G.badblocks++;
|
---|
543 | G.currently_testing++;
|
---|
544 | }
|
---|
545 | alarm(0);
|
---|
546 | printf("%d bad block(s)\n", G.badblocks);
|
---|
547 | }
|
---|
548 |
|
---|
549 | static void get_list_blocks(char *filename)
|
---|
550 | {
|
---|
551 | FILE *listfile;
|
---|
552 | unsigned long blockno;
|
---|
553 |
|
---|
554 | listfile = xfopen_for_read(filename);
|
---|
555 | while (!feof(listfile)) {
|
---|
556 | fscanf(listfile, "%ld\n", &blockno);
|
---|
557 | mark_zone(blockno);
|
---|
558 | G.badblocks++;
|
---|
559 | }
|
---|
560 | printf("%d bad block(s)\n", G.badblocks);
|
---|
561 | }
|
---|
562 |
|
---|
563 | static void setup_tables(void)
|
---|
564 | {
|
---|
565 | unsigned long inodes;
|
---|
566 | unsigned norm_firstzone;
|
---|
567 | unsigned sb_zmaps;
|
---|
568 | unsigned i;
|
---|
569 |
|
---|
570 | /* memset(G.superblock_buffer, 0, BLOCK_SIZE); */
|
---|
571 | /* memset(G.boot_block_buffer, 0, 512); */
|
---|
572 | SB_MAGIC = G.magic;
|
---|
573 | SB_ZONE_SIZE = 0;
|
---|
574 | SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
|
---|
575 | if (version2)
|
---|
576 | SB.s_zones = G.total_blocks;
|
---|
577 | else
|
---|
578 | SB.s_nzones = G.total_blocks;
|
---|
579 |
|
---|
580 | /* some magic nrs: 1 inode / 3 blocks */
|
---|
581 | if (G.req_nr_inodes == 0)
|
---|
582 | inodes = G.total_blocks / 3;
|
---|
583 | else
|
---|
584 | inodes = G.req_nr_inodes;
|
---|
585 | /* Round up inode count to fill block size */
|
---|
586 | if (version2)
|
---|
587 | inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
|
---|
588 | ~(MINIX2_INODES_PER_BLOCK - 1);
|
---|
589 | else
|
---|
590 | inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
|
---|
591 | ~(MINIX1_INODES_PER_BLOCK - 1);
|
---|
592 | if (inodes > 65535)
|
---|
593 | inodes = 65535;
|
---|
594 | SB_INODES = inodes;
|
---|
595 | SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK);
|
---|
596 |
|
---|
597 | /* Real bad hack but overwise mkfs.minix can be thrown
|
---|
598 | * in infinite loop...
|
---|
599 | * try:
|
---|
600 | * dd if=/dev/zero of=test.fs count=10 bs=1024
|
---|
601 | * mkfs.minix -i 200 test.fs
|
---|
602 | */
|
---|
603 | /* This code is not insane: NORM_FIRSTZONE is not a constant,
|
---|
604 | * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */
|
---|
605 | i = 999;
|
---|
606 | SB_ZMAPS = 0;
|
---|
607 | do {
|
---|
608 | norm_firstzone = NORM_FIRSTZONE;
|
---|
609 | sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK);
|
---|
610 | if (SB_ZMAPS == sb_zmaps) goto got_it;
|
---|
611 | SB_ZMAPS = sb_zmaps;
|
---|
612 | /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */
|
---|
613 | } while (--i);
|
---|
614 | bb_error_msg_and_die("incompatible size/inode count, try different -i N");
|
---|
615 | got_it:
|
---|
616 |
|
---|
617 | SB_FIRSTZONE = norm_firstzone;
|
---|
618 | G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
|
---|
619 | G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
|
---|
620 | memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
|
---|
621 | memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
|
---|
622 | for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
|
---|
623 | unmark_zone(i);
|
---|
624 | for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
|
---|
625 | unmark_inode(i);
|
---|
626 | G.inode_buffer = xzalloc(INODE_BUFFER_SIZE);
|
---|
627 | printf("%ld inodes\n", (long)SB_INODES);
|
---|
628 | printf("%ld blocks\n", (long)SB_ZONES);
|
---|
629 | printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)norm_firstzone);
|
---|
630 | printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE);
|
---|
631 | printf("Maxsize=%ld\n", (long)SB_MAXSIZE);
|
---|
632 | }
|
---|
633 |
|
---|
634 | int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
635 | int mkfs_minix_main(int argc UNUSED_PARAM, char **argv)
|
---|
636 | {
|
---|
637 | unsigned opt;
|
---|
638 | char *tmp;
|
---|
639 | struct stat statbuf;
|
---|
640 | char *str_i;
|
---|
641 | char *listfile = NULL;
|
---|
642 |
|
---|
643 | INIT_G();
|
---|
644 | /* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
|
---|
645 | G.namelen = 30;
|
---|
646 | G.dirsize = 32;
|
---|
647 | G.magic = MINIX1_SUPER_MAGIC2;
|
---|
648 |
|
---|
649 | if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
650 | bb_error_msg_and_die("bad inode size");
|
---|
651 | #if ENABLE_FEATURE_MINIX2
|
---|
652 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
653 | bb_error_msg_and_die("bad inode size");
|
---|
654 | #endif
|
---|
655 |
|
---|
656 | opt_complementary = "n+"; /* -n N */
|
---|
657 | opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &G.namelen);
|
---|
658 | argv += optind;
|
---|
659 | //if (opt & 1) -c
|
---|
660 | if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
|
---|
661 | //if (opt & 4) -l
|
---|
662 | if (opt & 8) { // -n
|
---|
663 | if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
|
---|
664 | else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
|
---|
665 | else bb_show_usage();
|
---|
666 | G.dirsize = G.namelen + 2;
|
---|
667 | }
|
---|
668 | if (opt & 0x10) { // -v
|
---|
669 | #if ENABLE_FEATURE_MINIX2
|
---|
670 | version2 = 1;
|
---|
671 | #else
|
---|
672 | bb_error_msg_and_die("not compiled with minix v2 support");
|
---|
673 | #endif
|
---|
674 | }
|
---|
675 |
|
---|
676 | G.device_name = *argv++;
|
---|
677 | if (!G.device_name)
|
---|
678 | bb_show_usage();
|
---|
679 | if (*argv)
|
---|
680 | G.total_blocks = xatou32(*argv);
|
---|
681 | else
|
---|
682 | G.total_blocks = get_size(G.device_name) / 1024;
|
---|
683 |
|
---|
684 | if (G.total_blocks < 10)
|
---|
685 | bb_error_msg_and_die("must have at least 10 blocks");
|
---|
686 |
|
---|
687 | if (version2) {
|
---|
688 | G.magic = MINIX2_SUPER_MAGIC2;
|
---|
689 | if (G.namelen == 14)
|
---|
690 | G.magic = MINIX2_SUPER_MAGIC;
|
---|
691 | } else if (G.total_blocks > 65535)
|
---|
692 | G.total_blocks = 65535;
|
---|
693 |
|
---|
694 | /* Check if it is mounted */
|
---|
695 | if (find_mount_point(G.device_name, 0))
|
---|
696 | bb_error_msg_and_die("can't format mounted filesystem");
|
---|
697 |
|
---|
698 | xmove_fd(xopen(G.device_name, O_RDWR), dev_fd);
|
---|
699 | xfstat(dev_fd, &statbuf, G.device_name);
|
---|
700 | if (!S_ISBLK(statbuf.st_mode))
|
---|
701 | opt &= ~1; // clear -c (check)
|
---|
702 |
|
---|
703 | /* I don't know why someone has special code to prevent mkfs.minix
|
---|
704 | * on IDE devices. Why IDE but not SCSI, etc?... */
|
---|
705 | #if 0
|
---|
706 | else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
|
---|
707 | /* what is this? */
|
---|
708 | bb_error_msg_and_die("will not try "
|
---|
709 | "to make filesystem on '%s'", G.device_name);
|
---|
710 | #endif
|
---|
711 |
|
---|
712 | tmp = G.root_block;
|
---|
713 | *(short *) tmp = 1;
|
---|
714 | strcpy(tmp + 2, ".");
|
---|
715 | tmp += G.dirsize;
|
---|
716 | *(short *) tmp = 1;
|
---|
717 | strcpy(tmp + 2, "..");
|
---|
718 | tmp += G.dirsize;
|
---|
719 | *(short *) tmp = 2;
|
---|
720 | strcpy(tmp + 2, ".badblocks");
|
---|
721 |
|
---|
722 | setup_tables();
|
---|
723 |
|
---|
724 | if (opt & 1) // -c ?
|
---|
725 | check_blocks();
|
---|
726 | else if (listfile)
|
---|
727 | get_list_blocks(listfile);
|
---|
728 |
|
---|
729 | if (version2) {
|
---|
730 | make_root_inode2();
|
---|
731 | make_bad_inode2();
|
---|
732 | } else {
|
---|
733 | make_root_inode();
|
---|
734 | make_bad_inode();
|
---|
735 | }
|
---|
736 |
|
---|
737 | mark_good_blocks();
|
---|
738 | write_tables();
|
---|
739 | return 0;
|
---|
740 | }
|
---|