[821] | 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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[2725] | 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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[821] | 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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[1765] | 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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[821] | 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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[3232] | 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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[1765] | 76 | #include "libbb.h"
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[821] | 77 | #include <mntent.h>
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| 78 |
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[1765] | 79 | #include "minix.h"
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[821] | 80 |
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[2725] | 81 | /* Store the very same times/uids/gids for image consistency */
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| 82 | #if 1
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[1765] | 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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[2725] | 87 | /* Was using this. Is it useful? NB: this will break testsuite */
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[1765] | 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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[821] | 92 |
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[1765] | 93 | enum {
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| 94 | MAX_GOOD_BLOCKS = 512,
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| 95 | TEST_BUFFER_BLOCKS = 16,
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[821] | 96 | };
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| 97 |
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[1765] | 98 | #if !ENABLE_FEATURE_MINIX2
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| 99 | enum { version2 = 0 };
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[821] | 100 | #endif
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| 101 |
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[2725] | 102 | enum { dev_fd = 3 };
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| 103 |
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[1765] | 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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[821] | 108 | #endif
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[1765] | 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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[821] | 121 |
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[1765] | 122 | char root_block[BLOCK_SIZE];
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[2725] | 123 | char superblock_buffer[BLOCK_SIZE];
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[1765] | 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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[2725] | 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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[1765] | 133 | };
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| 134 | #define G (*ptr_to_globals)
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[2725] | 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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[821] | 138 |
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[1765] | 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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[821] | 143 |
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[1765] | 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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[821] | 146 |
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[2725] | 147 | #define SB (*(struct minix_superblock*)G.superblock_buffer)
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[821] | 148 |
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[1765] | 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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[821] | 156 |
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[1765] | 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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[821] | 160 | #else
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[1765] | 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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[2725] | 163 | (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
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[821] | 164 | #endif
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| 165 |
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[1765] | 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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[821] | 168 |
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[1765] | 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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[821] | 171 |
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[1765] | 172 | static int minix_bit(const char* a, unsigned i)
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[821] | 173 | {
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[2725] | 174 | return a[i >> 3] & (1<<(i & 7));
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[821] | 175 | }
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| 176 |
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[1765] | 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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[821] | 185 |
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[1765] | 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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[821] | 189 |
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[1765] | 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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[821] | 194 |
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[1765] | 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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[821] | 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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[1765] | 204 | if (lseek(fd, offset, SEEK_SET) < 0)
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[821] | 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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[1765] | 211 | static int count_blocks(int fd)
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[821] | 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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[1765] | 218 |
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[821] | 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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[1765] | 231 | static int get_size(const char *file)
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[821] | 232 | {
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| 233 | int fd;
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| 234 | long size;
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| 235 |
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[1765] | 236 | fd = xopen(file, O_RDWR);
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[821] | 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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[1765] | 247 | static void write_tables(void)
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[821] | 248 | {
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[2725] | 249 | /* Mark the superblock valid. */
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[1765] | 250 | SB.s_state |= MINIX_VALID_FS;
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| 251 | SB.s_state &= ~MINIX_ERROR_FS;
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[821] | 252 |
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[1765] | 253 | msg_eol = "seek to 0 failed";
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[2725] | 254 | xlseek(dev_fd, 0, SEEK_SET);
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[821] | 255 |
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[2725] | 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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[1765] | 258 |
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| 259 | msg_eol = "seek to BLOCK_SIZE failed";
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[2725] | 260 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
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[1765] | 261 |
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[2725] | 262 | msg_eol = "can't write superblock";
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| 263 | xwrite(dev_fd, G.superblock_buffer, BLOCK_SIZE);
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[1765] | 264 |
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[2725] | 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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[1765] | 267 |
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[2725] | 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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[1765] | 270 |
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[2725] | 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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[1765] | 273 |
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| 274 | msg_eol = "\n";
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[821] | 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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[2725] | 279 | xlseek(dev_fd, blk * BLOCK_SIZE, SEEK_SET);
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| 280 | xwrite(dev_fd, buffer, BLOCK_SIZE);
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[821] | 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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[1765] | 287 | if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
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[821] | 288 | bb_error_msg_and_die("too many bad blocks");
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[1765] | 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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[821] | 291 | else
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[1765] | 292 | blk = SB_FIRSTZONE;
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| 293 | while (blk < SB_ZONES && zone_in_use(blk))
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[821] | 294 | blk++;
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[1765] | 295 | if (blk >= SB_ZONES)
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[821] | 296 | bb_error_msg_and_die("not enough good blocks");
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[1765] | 297 | G.good_blocks_table[G.used_good_blocks] = blk;
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| 298 | G.used_good_blocks++;
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[821] | 299 | return blk;
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| 300 | }
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| 301 |
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[1765] | 302 | static void mark_good_blocks(void)
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[821] | 303 | {
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| 304 | int blk;
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| 305 |
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[1765] | 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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[821] | 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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[1765] | 313 | zone = SB_FIRSTZONE - 1;
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| 314 | while (++zone < SB_ZONES)
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[821] | 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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[1765] | 320 | static void make_bad_inode(void)
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[821] | 321 | {
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[1765] | 322 | struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
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[821] | 323 | int i, j, zone;
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| 324 | int ind = 0, dind = 0;
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[2725] | 325 | /* moved to globals to reduce stack usage
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[821] | 326 | unsigned short ind_block[BLOCK_SIZE >> 1];
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| 327 | unsigned short dind_block[BLOCK_SIZE >> 1];
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[2725] | 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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[821] | 331 |
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| 332 | #define NEXT_BAD (zone = next(zone))
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| 333 |
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[1765] | 334 | if (!G.badblocks)
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[821] | 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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[1765] | 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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[821] | 341 | inode->i_mode = S_IFREG + 0000;
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[1765] | 342 | inode->i_size = G.badblocks * BLOCK_SIZE;
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[821] | 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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[1765] | 369 | end_bad:
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[821] | 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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[2725] | 374 | #undef ind_block
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| 375 | #undef dind_block
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[821] | 376 | }
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| 377 |
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[1765] | 378 | #if ENABLE_FEATURE_MINIX2
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| 379 | static void make_bad_inode2(void)
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[821] | 380 | {
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[1765] | 381 | struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
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[821] | 382 | int i, j, zone;
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| 383 | int ind = 0, dind = 0;
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[2725] | 384 | /* moved to globals to reduce stack usage
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[821] | 385 | unsigned long ind_block[BLOCK_SIZE >> 2];
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| 386 | unsigned long dind_block[BLOCK_SIZE >> 2];
|
---|
[2725] | 387 | */
|
---|
| 388 | #define ind_block (G.ind_block2)
|
---|
| 389 | #define dind_block (G.dind_block2)
|
---|
[821] | 390 |
|
---|
[1765] | 391 | if (!G.badblocks)
|
---|
[821] | 392 | return;
|
---|
| 393 | mark_inode(MINIX_BAD_INO);
|
---|
| 394 | inode->i_nlinks = 1;
|
---|
[1765] | 395 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
|
---|
[821] | 396 | inode->i_mode = S_IFREG + 0000;
|
---|
[1765] | 397 | inode->i_size = G.badblocks * BLOCK_SIZE;
|
---|
[821] | 398 | zone = next(0);
|
---|
| 399 | for (i = 0; i < 7; i++) {
|
---|
| 400 | inode->i_zone[i] = zone;
|
---|
| 401 | if (!NEXT_BAD)
|
---|
| 402 | goto end_bad;
|
---|
| 403 | }
|
---|
| 404 | inode->i_zone[7] = ind = get_free_block();
|
---|
| 405 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
| 406 | for (i = 0; i < 256; i++) {
|
---|
| 407 | ind_block[i] = zone;
|
---|
| 408 | if (!NEXT_BAD)
|
---|
| 409 | goto end_bad;
|
---|
| 410 | }
|
---|
| 411 | inode->i_zone[8] = dind = get_free_block();
|
---|
| 412 | memset(dind_block, 0, BLOCK_SIZE);
|
---|
| 413 | for (i = 0; i < 256; i++) {
|
---|
| 414 | write_block(ind, (char *) ind_block);
|
---|
| 415 | dind_block[i] = ind = get_free_block();
|
---|
| 416 | memset(ind_block, 0, BLOCK_SIZE);
|
---|
| 417 | for (j = 0; j < 256; j++) {
|
---|
| 418 | ind_block[j] = zone;
|
---|
| 419 | if (!NEXT_BAD)
|
---|
| 420 | goto end_bad;
|
---|
| 421 | }
|
---|
| 422 | }
|
---|
| 423 | /* Could make triple indirect block here */
|
---|
| 424 | bb_error_msg_and_die("too many bad blocks");
|
---|
[1765] | 425 | end_bad:
|
---|
[821] | 426 | if (ind)
|
---|
| 427 | write_block(ind, (char *) ind_block);
|
---|
| 428 | if (dind)
|
---|
| 429 | write_block(dind, (char *) dind_block);
|
---|
[2725] | 430 | #undef ind_block
|
---|
| 431 | #undef dind_block
|
---|
[821] | 432 | }
|
---|
[1765] | 433 | #else
|
---|
| 434 | void make_bad_inode2(void);
|
---|
[821] | 435 | #endif
|
---|
| 436 |
|
---|
[1765] | 437 | static void make_root_inode(void)
|
---|
[821] | 438 | {
|
---|
[1765] | 439 | struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
|
---|
[821] | 440 |
|
---|
| 441 | mark_inode(MINIX_ROOT_INO);
|
---|
| 442 | inode->i_zone[0] = get_free_block();
|
---|
| 443 | inode->i_nlinks = 2;
|
---|
[1765] | 444 | inode->i_time = CUR_TIME;
|
---|
| 445 | if (G.badblocks)
|
---|
| 446 | inode->i_size = 3 * G.dirsize;
|
---|
[821] | 447 | else {
|
---|
[1765] | 448 | G.root_block[2 * G.dirsize] = '\0';
|
---|
| 449 | G.root_block[2 * G.dirsize + 1] = '\0';
|
---|
| 450 | inode->i_size = 2 * G.dirsize;
|
---|
[821] | 451 | }
|
---|
| 452 | inode->i_mode = S_IFDIR + 0755;
|
---|
[1765] | 453 | inode->i_uid = GETUID;
|
---|
[821] | 454 | if (inode->i_uid)
|
---|
[1765] | 455 | inode->i_gid = GETGID;
|
---|
| 456 | write_block(inode->i_zone[0], G.root_block);
|
---|
[821] | 457 | }
|
---|
| 458 |
|
---|
[1765] | 459 | #if ENABLE_FEATURE_MINIX2
|
---|
| 460 | static void make_root_inode2(void)
|
---|
[821] | 461 | {
|
---|
[1765] | 462 | struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
|
---|
[821] | 463 |
|
---|
| 464 | mark_inode(MINIX_ROOT_INO);
|
---|
| 465 | inode->i_zone[0] = get_free_block();
|
---|
| 466 | inode->i_nlinks = 2;
|
---|
[1765] | 467 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
|
---|
| 468 | if (G.badblocks)
|
---|
| 469 | inode->i_size = 3 * G.dirsize;
|
---|
[821] | 470 | else {
|
---|
[1765] | 471 | G.root_block[2 * G.dirsize] = '\0';
|
---|
| 472 | G.root_block[2 * G.dirsize + 1] = '\0';
|
---|
| 473 | inode->i_size = 2 * G.dirsize;
|
---|
[821] | 474 | }
|
---|
| 475 | inode->i_mode = S_IFDIR + 0755;
|
---|
[1765] | 476 | inode->i_uid = GETUID;
|
---|
[821] | 477 | if (inode->i_uid)
|
---|
[1765] | 478 | inode->i_gid = GETGID;
|
---|
| 479 | write_block(inode->i_zone[0], G.root_block);
|
---|
[821] | 480 | }
|
---|
[1765] | 481 | #else
|
---|
| 482 | void make_root_inode2(void);
|
---|
[821] | 483 | #endif
|
---|
| 484 |
|
---|
| 485 | /*
|
---|
| 486 | * Perform a test of a block; return the number of
|
---|
[1765] | 487 | * blocks readable.
|
---|
[821] | 488 | */
|
---|
[1765] | 489 | static size_t do_check(char *buffer, size_t try, unsigned current_block)
|
---|
[821] | 490 | {
|
---|
[1765] | 491 | ssize_t got;
|
---|
[821] | 492 |
|
---|
| 493 | /* Seek to the correct loc. */
|
---|
[1765] | 494 | msg_eol = "seek failed during testing of blocks";
|
---|
[2725] | 495 | xlseek(dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
|
---|
[1765] | 496 | msg_eol = "\n";
|
---|
[821] | 497 |
|
---|
| 498 | /* Try the read */
|
---|
[2725] | 499 | got = read(dev_fd, buffer, try * BLOCK_SIZE);
|
---|
[821] | 500 | if (got < 0)
|
---|
| 501 | got = 0;
|
---|
[1765] | 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;
|
---|
[821] | 507 | }
|
---|
| 508 |
|
---|
[2725] | 509 | static void alarm_intr(int alnum UNUSED_PARAM)
|
---|
[821] | 510 | {
|
---|
[1765] | 511 | if (G.currently_testing >= SB_ZONES)
|
---|
[821] | 512 | return;
|
---|
| 513 | signal(SIGALRM, alarm_intr);
|
---|
| 514 | alarm(5);
|
---|
[1765] | 515 | if (!G.currently_testing)
|
---|
[821] | 516 | return;
|
---|
[1765] | 517 | printf("%d ...", G.currently_testing);
|
---|
[2725] | 518 | fflush_all();
|
---|
[821] | 519 | }
|
---|
| 520 |
|
---|
| 521 | static void check_blocks(void)
|
---|
| 522 | {
|
---|
[1765] | 523 | size_t try, got;
|
---|
[821] | 524 |
|
---|
[1765] | 525 | G.currently_testing = 0;
|
---|
[821] | 526 | signal(SIGALRM, alarm_intr);
|
---|
| 527 | alarm(5);
|
---|
[1765] | 528 | while (G.currently_testing < SB_ZONES) {
|
---|
| 529 | msg_eol = "seek failed in check_blocks";
|
---|
[2725] | 530 | xlseek(dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
|
---|
[1765] | 531 | msg_eol = "\n";
|
---|
[821] | 532 | try = TEST_BUFFER_BLOCKS;
|
---|
[1765] | 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;
|
---|
[821] | 537 | if (got == try)
|
---|
| 538 | continue;
|
---|
[1765] | 539 | if (G.currently_testing < SB_FIRSTZONE)
|
---|
[821] | 540 | bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
|
---|
[1765] | 541 | mark_zone(G.currently_testing);
|
---|
| 542 | G.badblocks++;
|
---|
| 543 | G.currently_testing++;
|
---|
[821] | 544 | }
|
---|
[1765] | 545 | alarm(0);
|
---|
| 546 | printf("%d bad block(s)\n", G.badblocks);
|
---|
[821] | 547 | }
|
---|
| 548 |
|
---|
| 549 | static void get_list_blocks(char *filename)
|
---|
| 550 | {
|
---|
| 551 | FILE *listfile;
|
---|
| 552 | unsigned long blockno;
|
---|
| 553 |
|
---|
[2725] | 554 | listfile = xfopen_for_read(filename);
|
---|
[821] | 555 | while (!feof(listfile)) {
|
---|
| 556 | fscanf(listfile, "%ld\n", &blockno);
|
---|
| 557 | mark_zone(blockno);
|
---|
[1765] | 558 | G.badblocks++;
|
---|
[821] | 559 | }
|
---|
[1765] | 560 | printf("%d bad block(s)\n", G.badblocks);
|
---|
[821] | 561 | }
|
---|
| 562 |
|
---|
[1765] | 563 | static void setup_tables(void)
|
---|
| 564 | {
|
---|
| 565 | unsigned long inodes;
|
---|
| 566 | unsigned norm_firstzone;
|
---|
| 567 | unsigned sb_zmaps;
|
---|
| 568 | unsigned i;
|
---|
| 569 |
|
---|
[2725] | 570 | /* memset(G.superblock_buffer, 0, BLOCK_SIZE); */
|
---|
[1765] | 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 |
|
---|
[2725] | 634 | int mkfs_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 635 | int mkfs_minix_main(int argc UNUSED_PARAM, char **argv)
|
---|
[821] | 636 | {
|
---|
[1765] | 637 | unsigned opt;
|
---|
[821] | 638 | char *tmp;
|
---|
| 639 | struct stat statbuf;
|
---|
[2725] | 640 | char *str_i;
|
---|
[821] | 641 | char *listfile = NULL;
|
---|
| 642 |
|
---|
[2725] | 643 | INIT_G();
|
---|
[1765] | 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)
|
---|
[821] | 650 | bb_error_msg_and_die("bad inode size");
|
---|
[1765] | 651 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 652 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
| 653 | bb_error_msg_and_die("bad inode size");
|
---|
| 654 | #endif
|
---|
| 655 |
|
---|
[2725] | 656 | opt_complementary = "n+"; /* -n N */
|
---|
| 657 | opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &G.namelen);
|
---|
[1765] | 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;
|
---|
[821] | 671 | #else
|
---|
[1765] | 672 | bb_error_msg_and_die("not compiled with minix v2 support");
|
---|
[821] | 673 | #endif
|
---|
| 674 | }
|
---|
| 675 |
|
---|
[1765] | 676 | G.device_name = *argv++;
|
---|
| 677 | if (!G.device_name)
|
---|
[821] | 678 | bb_show_usage();
|
---|
[1765] | 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 |
|
---|
[821] | 687 | if (version2) {
|
---|
[1765] | 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 */
|
---|
[2725] | 695 | if (find_mount_point(G.device_name, 0))
|
---|
| 696 | bb_error_msg_and_die("can't format mounted filesystem");
|
---|
[1765] | 697 |
|
---|
[2725] | 698 | xmove_fd(xopen(G.device_name, O_RDWR), dev_fd);
|
---|
| 699 | xfstat(dev_fd, &statbuf, G.device_name);
|
---|
[1765] | 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);
|
---|
[821] | 710 | #endif
|
---|
[1765] | 711 |
|
---|
| 712 | tmp = G.root_block;
|
---|
[821] | 713 | *(short *) tmp = 1;
|
---|
| 714 | strcpy(tmp + 2, ".");
|
---|
[1765] | 715 | tmp += G.dirsize;
|
---|
[821] | 716 | *(short *) tmp = 1;
|
---|
| 717 | strcpy(tmp + 2, "..");
|
---|
[1765] | 718 | tmp += G.dirsize;
|
---|
[821] | 719 | *(short *) tmp = 2;
|
---|
| 720 | strcpy(tmp + 2, ".badblocks");
|
---|
[1765] | 721 |
|
---|
[821] | 722 | setup_tables();
|
---|
[1765] | 723 |
|
---|
| 724 | if (opt & 1) // -c ?
|
---|
[821] | 725 | check_blocks();
|
---|
| 726 | else if (listfile)
|
---|
| 727 | get_list_blocks(listfile);
|
---|
[1765] | 728 |
|
---|
[821] | 729 | if (version2) {
|
---|
| 730 | make_root_inode2();
|
---|
| 731 | make_bad_inode2();
|
---|
[1765] | 732 | } else {
|
---|
[821] | 733 | make_root_inode();
|
---|
| 734 | make_bad_inode();
|
---|
| 735 | }
|
---|
[1765] | 736 |
|
---|
[821] | 737 | mark_good_blocks();
|
---|
| 738 | write_tables();
|
---|
| 739 | return 0;
|
---|
| 740 | }
|
---|