[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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| 5 | * (C) 1991 Linus Torvalds. This file may be redistributed as per
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| 6 | * the Linux copyright.
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| 7 | */
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| 8 |
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| 9 | /*
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| 10 | * DD.MM.YY
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| 11 | *
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| 12 | * 24.11.91 - Time began. Used the fsck sources to get started.
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| 13 | *
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| 14 | * 25.11.91 - Corrected some bugs. Added support for ".badblocks"
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| 15 | * The algorithm for ".badblocks" is a bit weird, but
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| 16 | * it should work. Oh, well.
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| 17 | *
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| 18 | * 25.01.92 - Added the -l option for getting the list of bad blocks
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| 19 | * out of a named file. (Dave Rivers, rivers@ponds.uucp)
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| 20 | *
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| 21 | * 28.02.92 - Added %-information when using -c.
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| 22 | *
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| 23 | * 28.02.93 - Added support for other namelengths than the original
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| 24 | * 14 characters so that I can test the new kernel routines..
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| 25 | *
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| 26 | * 09.10.93 - Make exit status conform to that required by fsutil
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| 27 | * (Rik Faith, faith@cs.unc.edu)
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| 28 | *
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| 29 | * 31.10.93 - Added inode request feature, for backup floppies: use
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| 30 | * 32 inodes, for a news partition use more.
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| 31 | * (Scott Heavner, sdh@po.cwru.edu)
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| 32 | *
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| 33 | * 03.01.94 - Added support for file system valid flag.
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| 34 | * (Dr. Wettstein, greg%wind.uucp@plains.nodak.edu)
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| 35 | *
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[1765] | 36 | * 30.10.94 - added support for v2 filesystem
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| 37 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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[821] | 38 | *
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| 39 | * 09.11.94 - Added test to prevent overwrite of mounted fs adapted
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| 40 | * from Theodore Ts'o's (tytso@athena.mit.edu) mke2fs
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| 41 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
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| 42 | *
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| 43 | * 03.20.95 - Clear first 512 bytes of filesystem to make certain that
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| 44 | * the filesystem is not misidentified as a MS-DOS FAT filesystem.
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| 45 | * (Daniel Quinlan, quinlan@yggdrasil.com)
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| 46 | *
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| 47 | * 02.07.96 - Added small patch from Russell King to make the program a
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| 48 | * good deal more portable (janl@math.uio.no)
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| 49 | *
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| 50 | * Usage: mkfs [-c | -l filename ] [-v] [-nXX] [-iXX] device [size-in-blocks]
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| 51 | *
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| 52 | * -c for readability checking (SLOW!)
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| 53 | * -l for getting a list of bad blocks from a file.
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| 54 | * -n for namelength (currently the kernel only uses 14 or 30)
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| 55 | * -i for number of inodes
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| 56 | * -v for v2 filesystem
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| 57 | *
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| 58 | * The device may be a block device or a image of one, but this isn't
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| 59 | * enforced (but it's not much fun on a character device :-).
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| 60 | *
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| 61 | * Modified for BusyBox by Erik Andersen <andersen@debian.org> --
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| 62 | * removed getopt based parser and added a hand rolled one.
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| 63 | */
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| 64 |
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[1765] | 65 | #include "libbb.h"
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[821] | 66 | #include <mntent.h>
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| 67 |
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[1765] | 68 | #include "minix.h"
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[821] | 69 |
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[1765] | 70 | #define DEBUG 0
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[821] | 71 |
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[1765] | 72 | /* If debugging, store the very same times/uids/gids for image consistency */
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| 73 | #if DEBUG
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| 74 | # define CUR_TIME 0
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| 75 | # define GETUID 0
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| 76 | # define GETGID 0
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| 77 | #else
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| 78 | # define CUR_TIME time(NULL)
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| 79 | # define GETUID getuid()
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| 80 | # define GETGID getgid()
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| 81 | #endif
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[821] | 82 |
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[1765] | 83 | enum {
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| 84 | MAX_GOOD_BLOCKS = 512,
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| 85 | TEST_BUFFER_BLOCKS = 16,
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[821] | 86 | };
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| 87 |
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[1765] | 88 | #if !ENABLE_FEATURE_MINIX2
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| 89 | enum { version2 = 0 };
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[821] | 90 | #endif
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| 91 |
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[1765] | 92 | struct globals {
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| 93 | int dev_fd;
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[821] | 94 |
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[1765] | 95 | #if ENABLE_FEATURE_MINIX2
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| 96 | smallint version2;
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| 97 | #define version2 G.version2
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[821] | 98 | #endif
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[1765] | 99 | char *device_name;
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| 100 | uint32_t total_blocks;
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| 101 | int badblocks;
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| 102 | int namelen;
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| 103 | int dirsize;
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| 104 | int magic;
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| 105 | char *inode_buffer;
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| 106 | char *inode_map;
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| 107 | char *zone_map;
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| 108 | int used_good_blocks;
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| 109 | unsigned long req_nr_inodes;
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| 110 | unsigned currently_testing;
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[821] | 111 |
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| 112 |
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[1765] | 113 | char root_block[BLOCK_SIZE];
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| 114 | char super_block_buffer[BLOCK_SIZE];
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| 115 | char boot_block_buffer[512];
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| 116 | unsigned short good_blocks_table[MAX_GOOD_BLOCKS];
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| 117 | /* check_blocks(): buffer[] was the biggest static in entire bbox */
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| 118 | char check_blocks_buffer[BLOCK_SIZE * TEST_BUFFER_BLOCKS];
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| 119 | };
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[821] | 120 |
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[1765] | 121 | #define G (*ptr_to_globals)
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[821] | 122 |
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[1765] | 123 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
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| 124 | {
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| 125 | return (size + n-1) / n;
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| 126 | }
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[821] | 127 |
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[1765] | 128 | #define INODE_BUF1 (((struct minix1_inode*)G.inode_buffer) - 1)
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| 129 | #define INODE_BUF2 (((struct minix2_inode*)G.inode_buffer) - 1)
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[821] | 130 |
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[1765] | 131 | #define SB (*(struct minix_super_block*)G.super_block_buffer)
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[821] | 132 |
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[1765] | 133 | #define SB_INODES (SB.s_ninodes)
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| 134 | #define SB_IMAPS (SB.s_imap_blocks)
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| 135 | #define SB_ZMAPS (SB.s_zmap_blocks)
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| 136 | #define SB_FIRSTZONE (SB.s_firstdatazone)
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| 137 | #define SB_ZONE_SIZE (SB.s_log_zone_size)
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| 138 | #define SB_MAXSIZE (SB.s_max_size)
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| 139 | #define SB_MAGIC (SB.s_magic)
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[821] | 140 |
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[1765] | 141 | #if !ENABLE_FEATURE_MINIX2
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| 142 | # define SB_ZONES (SB.s_nzones)
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| 143 | # define INODE_BLOCKS div_roundup(SB_INODES, MINIX1_INODES_PER_BLOCK)
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[821] | 144 | #else
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[1765] | 145 | # define SB_ZONES (version2 ? SB.s_zones : SB.s_nzones)
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| 146 | # define INODE_BLOCKS div_roundup(SB_INODES, \
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| 147 | version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK)
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[821] | 148 | #endif
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| 149 |
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[1765] | 150 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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| 151 | #define NORM_FIRSTZONE (2 + SB_IMAPS + SB_ZMAPS + INODE_BLOCKS)
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[821] | 152 |
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[1765] | 153 | /* Before you ask "where they come from?": */
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| 154 | /* setbit/clrbit are supplied by sys/param.h */
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[821] | 155 |
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[1765] | 156 | static int minix_bit(const char* a, unsigned i)
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[821] | 157 | {
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[1765] | 158 | return a[i >> 3] & (1<<(i & 7));
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[821] | 159 | }
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| 160 |
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[1765] | 161 | static void minix_setbit(char *a, unsigned i)
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| 162 | {
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| 163 | setbit(a, i);
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| 164 | }
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| 165 | static void minix_clrbit(char *a, unsigned i)
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| 166 | {
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| 167 | clrbit(a, i);
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| 168 | }
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[821] | 169 |
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[1765] | 170 | /* Note: do not assume 0/1, it is 0/nonzero */
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| 171 | #define zone_in_use(x) minix_bit(G.zone_map,(x)-SB_FIRSTZONE+1)
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| 172 | /*#define inode_in_use(x) minix_bit(G.inode_map,(x))*/
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[821] | 173 |
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[1765] | 174 | #define mark_inode(x) minix_setbit(G.inode_map,(x))
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| 175 | #define unmark_inode(x) minix_clrbit(G.inode_map,(x))
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| 176 | #define mark_zone(x) minix_setbit(G.zone_map,(x)-SB_FIRSTZONE+1)
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| 177 | #define unmark_zone(x) minix_clrbit(G.zone_map,(x)-SB_FIRSTZONE+1)
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[821] | 178 |
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[1765] | 179 | #ifndef BLKGETSIZE
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| 180 | # define BLKGETSIZE _IO(0x12,96) /* return device size */
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| 181 | #endif
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[821] | 182 |
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| 183 |
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| 184 | static long valid_offset(int fd, int offset)
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| 185 | {
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| 186 | char ch;
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| 187 |
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[1765] | 188 | if (lseek(fd, offset, SEEK_SET) < 0)
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[821] | 189 | return 0;
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| 190 | if (read(fd, &ch, 1) < 1)
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| 191 | return 0;
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| 192 | return 1;
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| 193 | }
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| 194 |
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[1765] | 195 | static int count_blocks(int fd)
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[821] | 196 | {
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| 197 | int high, low;
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| 198 |
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| 199 | low = 0;
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| 200 | for (high = 1; valid_offset(fd, high); high *= 2)
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| 201 | low = high;
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[1765] | 202 |
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[821] | 203 | while (low < high - 1) {
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| 204 | const int mid = (low + high) / 2;
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| 205 |
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| 206 | if (valid_offset(fd, mid))
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| 207 | low = mid;
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| 208 | else
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| 209 | high = mid;
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| 210 | }
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| 211 | valid_offset(fd, 0);
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| 212 | return (low + 1);
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| 213 | }
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| 214 |
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[1765] | 215 | static int get_size(const char *file)
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[821] | 216 | {
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| 217 | int fd;
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| 218 | long size;
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| 219 |
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[1765] | 220 | fd = xopen(file, O_RDWR);
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[821] | 221 | if (ioctl(fd, BLKGETSIZE, &size) >= 0) {
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| 222 | close(fd);
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| 223 | return (size * 512);
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| 224 | }
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| 225 |
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| 226 | size = count_blocks(fd);
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| 227 | close(fd);
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| 228 | return size;
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| 229 | }
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| 230 |
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[1765] | 231 | static void write_tables(void)
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[821] | 232 | {
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| 233 | /* Mark the super block valid. */
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[1765] | 234 | SB.s_state |= MINIX_VALID_FS;
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| 235 | SB.s_state &= ~MINIX_ERROR_FS;
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[821] | 236 |
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[1765] | 237 | msg_eol = "seek to 0 failed";
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| 238 | xlseek(G.dev_fd, 0, SEEK_SET);
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[821] | 239 |
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[1765] | 240 | msg_eol = "cannot clear boot sector";
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| 241 | xwrite(G.dev_fd, G.boot_block_buffer, 512);
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| 242 |
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| 243 | msg_eol = "seek to BLOCK_SIZE failed";
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| 244 | xlseek(G.dev_fd, BLOCK_SIZE, SEEK_SET);
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| 245 |
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| 246 | msg_eol = "cannot write superblock";
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| 247 | xwrite(G.dev_fd, G.super_block_buffer, BLOCK_SIZE);
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| 248 |
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| 249 | msg_eol = "cannot write inode map";
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| 250 | xwrite(G.dev_fd, G.inode_map, SB_IMAPS * BLOCK_SIZE);
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| 251 |
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| 252 | msg_eol = "cannot write zone map";
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| 253 | xwrite(G.dev_fd, G.zone_map, SB_ZMAPS * BLOCK_SIZE);
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| 254 |
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| 255 | msg_eol = "cannot write inodes";
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| 256 | xwrite(G.dev_fd, G.inode_buffer, INODE_BUFFER_SIZE);
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| 257 |
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| 258 | msg_eol = "\n";
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[821] | 259 | }
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| 260 |
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| 261 | static void write_block(int blk, char *buffer)
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| 262 | {
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[1765] | 263 | xlseek(G.dev_fd, blk * BLOCK_SIZE, SEEK_SET);
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| 264 | xwrite(G.dev_fd, buffer, BLOCK_SIZE);
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[821] | 265 | }
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| 266 |
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| 267 | static int get_free_block(void)
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| 268 | {
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| 269 | int blk;
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| 270 |
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[1765] | 271 | if (G.used_good_blocks + 1 >= MAX_GOOD_BLOCKS)
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[821] | 272 | bb_error_msg_and_die("too many bad blocks");
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[1765] | 273 | if (G.used_good_blocks)
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| 274 | blk = G.good_blocks_table[G.used_good_blocks - 1] + 1;
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[821] | 275 | else
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[1765] | 276 | blk = SB_FIRSTZONE;
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| 277 | while (blk < SB_ZONES && zone_in_use(blk))
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[821] | 278 | blk++;
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[1765] | 279 | if (blk >= SB_ZONES)
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[821] | 280 | bb_error_msg_and_die("not enough good blocks");
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[1765] | 281 | G.good_blocks_table[G.used_good_blocks] = blk;
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| 282 | G.used_good_blocks++;
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[821] | 283 | return blk;
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| 284 | }
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| 285 |
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[1765] | 286 | static void mark_good_blocks(void)
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[821] | 287 | {
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| 288 | int blk;
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| 289 |
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[1765] | 290 | for (blk = 0; blk < G.used_good_blocks; blk++)
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| 291 | mark_zone(G.good_blocks_table[blk]);
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[821] | 292 | }
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| 293 |
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| 294 | static int next(int zone)
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| 295 | {
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| 296 | if (!zone)
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[1765] | 297 | zone = SB_FIRSTZONE - 1;
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| 298 | while (++zone < SB_ZONES)
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[821] | 299 | if (zone_in_use(zone))
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| 300 | return zone;
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| 301 | return 0;
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| 302 | }
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| 303 |
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[1765] | 304 | static void make_bad_inode(void)
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[821] | 305 | {
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[1765] | 306 | struct minix1_inode *inode = &INODE_BUF1[MINIX_BAD_INO];
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[821] | 307 | int i, j, zone;
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| 308 | int ind = 0, dind = 0;
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| 309 | unsigned short ind_block[BLOCK_SIZE >> 1];
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| 310 | unsigned short dind_block[BLOCK_SIZE >> 1];
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| 311 |
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| 312 | #define NEXT_BAD (zone = next(zone))
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| 313 |
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[1765] | 314 | if (!G.badblocks)
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[821] | 315 | return;
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| 316 | mark_inode(MINIX_BAD_INO);
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| 317 | inode->i_nlinks = 1;
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[1765] | 318 | /* BTW, setting this makes all images different */
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| 319 | /* it's harder to check for bugs then - diff isn't helpful :(... */
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| 320 | inode->i_time = CUR_TIME;
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[821] | 321 | inode->i_mode = S_IFREG + 0000;
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[1765] | 322 | inode->i_size = G.badblocks * BLOCK_SIZE;
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[821] | 323 | zone = next(0);
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| 324 | for (i = 0; i < 7; i++) {
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| 325 | inode->i_zone[i] = zone;
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| 326 | if (!NEXT_BAD)
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| 327 | goto end_bad;
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| 328 | }
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| 329 | inode->i_zone[7] = ind = get_free_block();
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| 330 | memset(ind_block, 0, BLOCK_SIZE);
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| 331 | for (i = 0; i < 512; i++) {
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| 332 | ind_block[i] = zone;
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| 333 | if (!NEXT_BAD)
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| 334 | goto end_bad;
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| 335 | }
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| 336 | inode->i_zone[8] = dind = get_free_block();
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| 337 | memset(dind_block, 0, BLOCK_SIZE);
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| 338 | for (i = 0; i < 512; i++) {
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| 339 | write_block(ind, (char *) ind_block);
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| 340 | dind_block[i] = ind = get_free_block();
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| 341 | memset(ind_block, 0, BLOCK_SIZE);
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| 342 | for (j = 0; j < 512; j++) {
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| 343 | ind_block[j] = zone;
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| 344 | if (!NEXT_BAD)
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| 345 | goto end_bad;
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| 346 | }
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| 347 | }
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| 348 | bb_error_msg_and_die("too many bad blocks");
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[1765] | 349 | end_bad:
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[821] | 350 | if (ind)
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| 351 | write_block(ind, (char *) ind_block);
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| 352 | if (dind)
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| 353 | write_block(dind, (char *) dind_block);
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| 354 | }
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| 355 |
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[1765] | 356 | #if ENABLE_FEATURE_MINIX2
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| 357 | static void make_bad_inode2(void)
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[821] | 358 | {
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[1765] | 359 | struct minix2_inode *inode = &INODE_BUF2[MINIX_BAD_INO];
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[821] | 360 | int i, j, zone;
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| 361 | int ind = 0, dind = 0;
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| 362 | unsigned long ind_block[BLOCK_SIZE >> 2];
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| 363 | unsigned long dind_block[BLOCK_SIZE >> 2];
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| 364 |
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[1765] | 365 | if (!G.badblocks)
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[821] | 366 | return;
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| 367 | mark_inode(MINIX_BAD_INO);
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| 368 | inode->i_nlinks = 1;
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[1765] | 369 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
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[821] | 370 | inode->i_mode = S_IFREG + 0000;
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[1765] | 371 | inode->i_size = G.badblocks * BLOCK_SIZE;
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[821] | 372 | zone = next(0);
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| 373 | for (i = 0; i < 7; i++) {
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| 374 | inode->i_zone[i] = zone;
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| 375 | if (!NEXT_BAD)
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| 376 | goto end_bad;
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| 377 | }
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| 378 | inode->i_zone[7] = ind = get_free_block();
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| 379 | memset(ind_block, 0, BLOCK_SIZE);
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| 380 | for (i = 0; i < 256; i++) {
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| 381 | ind_block[i] = zone;
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| 382 | if (!NEXT_BAD)
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| 383 | goto end_bad;
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| 384 | }
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| 385 | inode->i_zone[8] = dind = get_free_block();
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| 386 | memset(dind_block, 0, BLOCK_SIZE);
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| 387 | for (i = 0; i < 256; i++) {
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| 388 | write_block(ind, (char *) ind_block);
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| 389 | dind_block[i] = ind = get_free_block();
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| 390 | memset(ind_block, 0, BLOCK_SIZE);
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| 391 | for (j = 0; j < 256; j++) {
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| 392 | ind_block[j] = zone;
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| 393 | if (!NEXT_BAD)
|
---|
| 394 | goto end_bad;
|
---|
| 395 | }
|
---|
| 396 | }
|
---|
| 397 | /* Could make triple indirect block here */
|
---|
| 398 | bb_error_msg_and_die("too many bad blocks");
|
---|
[1765] | 399 | end_bad:
|
---|
[821] | 400 | if (ind)
|
---|
| 401 | write_block(ind, (char *) ind_block);
|
---|
| 402 | if (dind)
|
---|
| 403 | write_block(dind, (char *) dind_block);
|
---|
| 404 | }
|
---|
[1765] | 405 | #else
|
---|
| 406 | void make_bad_inode2(void);
|
---|
[821] | 407 | #endif
|
---|
| 408 |
|
---|
[1765] | 409 | static void make_root_inode(void)
|
---|
[821] | 410 | {
|
---|
[1765] | 411 | struct minix1_inode *inode = &INODE_BUF1[MINIX_ROOT_INO];
|
---|
[821] | 412 |
|
---|
| 413 | mark_inode(MINIX_ROOT_INO);
|
---|
| 414 | inode->i_zone[0] = get_free_block();
|
---|
| 415 | inode->i_nlinks = 2;
|
---|
[1765] | 416 | inode->i_time = CUR_TIME;
|
---|
| 417 | if (G.badblocks)
|
---|
| 418 | inode->i_size = 3 * G.dirsize;
|
---|
[821] | 419 | else {
|
---|
[1765] | 420 | G.root_block[2 * G.dirsize] = '\0';
|
---|
| 421 | G.root_block[2 * G.dirsize + 1] = '\0';
|
---|
| 422 | inode->i_size = 2 * G.dirsize;
|
---|
[821] | 423 | }
|
---|
| 424 | inode->i_mode = S_IFDIR + 0755;
|
---|
[1765] | 425 | inode->i_uid = GETUID;
|
---|
[821] | 426 | if (inode->i_uid)
|
---|
[1765] | 427 | inode->i_gid = GETGID;
|
---|
| 428 | write_block(inode->i_zone[0], G.root_block);
|
---|
[821] | 429 | }
|
---|
| 430 |
|
---|
[1765] | 431 | #if ENABLE_FEATURE_MINIX2
|
---|
| 432 | static void make_root_inode2(void)
|
---|
[821] | 433 | {
|
---|
[1765] | 434 | struct minix2_inode *inode = &INODE_BUF2[MINIX_ROOT_INO];
|
---|
[821] | 435 |
|
---|
| 436 | mark_inode(MINIX_ROOT_INO);
|
---|
| 437 | inode->i_zone[0] = get_free_block();
|
---|
| 438 | inode->i_nlinks = 2;
|
---|
[1765] | 439 | inode->i_atime = inode->i_mtime = inode->i_ctime = CUR_TIME;
|
---|
| 440 | if (G.badblocks)
|
---|
| 441 | inode->i_size = 3 * G.dirsize;
|
---|
[821] | 442 | else {
|
---|
[1765] | 443 | G.root_block[2 * G.dirsize] = '\0';
|
---|
| 444 | G.root_block[2 * G.dirsize + 1] = '\0';
|
---|
| 445 | inode->i_size = 2 * G.dirsize;
|
---|
[821] | 446 | }
|
---|
| 447 | inode->i_mode = S_IFDIR + 0755;
|
---|
[1765] | 448 | inode->i_uid = GETUID;
|
---|
[821] | 449 | if (inode->i_uid)
|
---|
[1765] | 450 | inode->i_gid = GETGID;
|
---|
| 451 | write_block(inode->i_zone[0], G.root_block);
|
---|
[821] | 452 | }
|
---|
[1765] | 453 | #else
|
---|
| 454 | void make_root_inode2(void);
|
---|
[821] | 455 | #endif
|
---|
| 456 |
|
---|
| 457 | /*
|
---|
| 458 | * Perform a test of a block; return the number of
|
---|
[1765] | 459 | * blocks readable.
|
---|
[821] | 460 | */
|
---|
[1765] | 461 | static size_t do_check(char *buffer, size_t try, unsigned current_block)
|
---|
[821] | 462 | {
|
---|
[1765] | 463 | ssize_t got;
|
---|
[821] | 464 |
|
---|
| 465 | /* Seek to the correct loc. */
|
---|
[1765] | 466 | msg_eol = "seek failed during testing of blocks";
|
---|
| 467 | xlseek(G.dev_fd, current_block * BLOCK_SIZE, SEEK_SET);
|
---|
| 468 | msg_eol = "\n";
|
---|
[821] | 469 |
|
---|
| 470 | /* Try the read */
|
---|
[1765] | 471 | got = read(G.dev_fd, buffer, try * BLOCK_SIZE);
|
---|
[821] | 472 | if (got < 0)
|
---|
| 473 | got = 0;
|
---|
[1765] | 474 | try = ((size_t)got) / BLOCK_SIZE;
|
---|
| 475 |
|
---|
| 476 | if (got & (BLOCK_SIZE - 1))
|
---|
| 477 | fprintf(stderr, "Short read at block %u\n", (unsigned)(current_block + try));
|
---|
| 478 | return try;
|
---|
[821] | 479 | }
|
---|
| 480 |
|
---|
| 481 | static void alarm_intr(int alnum)
|
---|
| 482 | {
|
---|
[1765] | 483 | if (G.currently_testing >= SB_ZONES)
|
---|
[821] | 484 | return;
|
---|
| 485 | signal(SIGALRM, alarm_intr);
|
---|
| 486 | alarm(5);
|
---|
[1765] | 487 | if (!G.currently_testing)
|
---|
[821] | 488 | return;
|
---|
[1765] | 489 | printf("%d ...", G.currently_testing);
|
---|
[821] | 490 | fflush(stdout);
|
---|
| 491 | }
|
---|
| 492 |
|
---|
| 493 | static void check_blocks(void)
|
---|
| 494 | {
|
---|
[1765] | 495 | size_t try, got;
|
---|
[821] | 496 |
|
---|
[1765] | 497 | G.currently_testing = 0;
|
---|
[821] | 498 | signal(SIGALRM, alarm_intr);
|
---|
| 499 | alarm(5);
|
---|
[1765] | 500 | while (G.currently_testing < SB_ZONES) {
|
---|
| 501 | msg_eol = "seek failed in check_blocks";
|
---|
| 502 | xlseek(G.dev_fd, G.currently_testing * BLOCK_SIZE, SEEK_SET);
|
---|
| 503 | msg_eol = "\n";
|
---|
[821] | 504 | try = TEST_BUFFER_BLOCKS;
|
---|
[1765] | 505 | if (G.currently_testing + try > SB_ZONES)
|
---|
| 506 | try = SB_ZONES - G.currently_testing;
|
---|
| 507 | got = do_check(G.check_blocks_buffer, try, G.currently_testing);
|
---|
| 508 | G.currently_testing += got;
|
---|
[821] | 509 | if (got == try)
|
---|
| 510 | continue;
|
---|
[1765] | 511 | if (G.currently_testing < SB_FIRSTZONE)
|
---|
[821] | 512 | bb_error_msg_and_die("bad blocks before data-area: cannot make fs");
|
---|
[1765] | 513 | mark_zone(G.currently_testing);
|
---|
| 514 | G.badblocks++;
|
---|
| 515 | G.currently_testing++;
|
---|
[821] | 516 | }
|
---|
[1765] | 517 | alarm(0);
|
---|
| 518 | printf("%d bad block(s)\n", G.badblocks);
|
---|
[821] | 519 | }
|
---|
| 520 |
|
---|
| 521 | static void get_list_blocks(char *filename)
|
---|
| 522 | {
|
---|
| 523 | FILE *listfile;
|
---|
| 524 | unsigned long blockno;
|
---|
| 525 |
|
---|
[1765] | 526 | listfile = xfopen(filename, "r");
|
---|
[821] | 527 | while (!feof(listfile)) {
|
---|
| 528 | fscanf(listfile, "%ld\n", &blockno);
|
---|
| 529 | mark_zone(blockno);
|
---|
[1765] | 530 | G.badblocks++;
|
---|
[821] | 531 | }
|
---|
[1765] | 532 | printf("%d bad block(s)\n", G.badblocks);
|
---|
[821] | 533 | }
|
---|
| 534 |
|
---|
[1765] | 535 | static void setup_tables(void)
|
---|
| 536 | {
|
---|
| 537 | unsigned long inodes;
|
---|
| 538 | unsigned norm_firstzone;
|
---|
| 539 | unsigned sb_zmaps;
|
---|
| 540 | unsigned i;
|
---|
| 541 |
|
---|
| 542 | /* memset(G.super_block_buffer, 0, BLOCK_SIZE); */
|
---|
| 543 | /* memset(G.boot_block_buffer, 0, 512); */
|
---|
| 544 | SB_MAGIC = G.magic;
|
---|
| 545 | SB_ZONE_SIZE = 0;
|
---|
| 546 | SB_MAXSIZE = version2 ? 0x7fffffff : (7 + 512 + 512 * 512) * 1024;
|
---|
| 547 | if (version2)
|
---|
| 548 | SB.s_zones = G.total_blocks;
|
---|
| 549 | else
|
---|
| 550 | SB.s_nzones = G.total_blocks;
|
---|
| 551 |
|
---|
| 552 | /* some magic nrs: 1 inode / 3 blocks */
|
---|
| 553 | if (G.req_nr_inodes == 0)
|
---|
| 554 | inodes = G.total_blocks / 3;
|
---|
| 555 | else
|
---|
| 556 | inodes = G.req_nr_inodes;
|
---|
| 557 | /* Round up inode count to fill block size */
|
---|
| 558 | if (version2)
|
---|
| 559 | inodes = (inodes + MINIX2_INODES_PER_BLOCK - 1) &
|
---|
| 560 | ~(MINIX2_INODES_PER_BLOCK - 1);
|
---|
| 561 | else
|
---|
| 562 | inodes = (inodes + MINIX1_INODES_PER_BLOCK - 1) &
|
---|
| 563 | ~(MINIX1_INODES_PER_BLOCK - 1);
|
---|
| 564 | if (inodes > 65535)
|
---|
| 565 | inodes = 65535;
|
---|
| 566 | SB_INODES = inodes;
|
---|
| 567 | SB_IMAPS = div_roundup(SB_INODES + 1, BITS_PER_BLOCK);
|
---|
| 568 |
|
---|
| 569 | /* Real bad hack but overwise mkfs.minix can be thrown
|
---|
| 570 | * in infinite loop...
|
---|
| 571 | * try:
|
---|
| 572 | * dd if=/dev/zero of=test.fs count=10 bs=1024
|
---|
| 573 | * mkfs.minix -i 200 test.fs
|
---|
| 574 | */
|
---|
| 575 | /* This code is not insane: NORM_FIRSTZONE is not a constant,
|
---|
| 576 | * it is calculated from SB_INODES, SB_IMAPS and SB_ZMAPS */
|
---|
| 577 | i = 999;
|
---|
| 578 | SB_ZMAPS = 0;
|
---|
| 579 | do {
|
---|
| 580 | norm_firstzone = NORM_FIRSTZONE;
|
---|
| 581 | sb_zmaps = div_roundup(G.total_blocks - norm_firstzone + 1, BITS_PER_BLOCK);
|
---|
| 582 | if (SB_ZMAPS == sb_zmaps) goto got_it;
|
---|
| 583 | SB_ZMAPS = sb_zmaps;
|
---|
| 584 | /* new SB_ZMAPS, need to recalc NORM_FIRSTZONE */
|
---|
| 585 | } while (--i);
|
---|
| 586 | bb_error_msg_and_die("incompatible size/inode count, try different -i N");
|
---|
| 587 | got_it:
|
---|
| 588 |
|
---|
| 589 | SB_FIRSTZONE = norm_firstzone;
|
---|
| 590 | G.inode_map = xmalloc(SB_IMAPS * BLOCK_SIZE);
|
---|
| 591 | G.zone_map = xmalloc(SB_ZMAPS * BLOCK_SIZE);
|
---|
| 592 | memset(G.inode_map, 0xff, SB_IMAPS * BLOCK_SIZE);
|
---|
| 593 | memset(G.zone_map, 0xff, SB_ZMAPS * BLOCK_SIZE);
|
---|
| 594 | for (i = SB_FIRSTZONE; i < SB_ZONES; i++)
|
---|
| 595 | unmark_zone(i);
|
---|
| 596 | for (i = MINIX_ROOT_INO; i <= SB_INODES; i++)
|
---|
| 597 | unmark_inode(i);
|
---|
| 598 | G.inode_buffer = xzalloc(INODE_BUFFER_SIZE);
|
---|
| 599 | printf("%ld inodes\n", (long)SB_INODES);
|
---|
| 600 | printf("%ld blocks\n", (long)SB_ZONES);
|
---|
| 601 | printf("Firstdatazone=%ld (%ld)\n", (long)SB_FIRSTZONE, (long)norm_firstzone);
|
---|
| 602 | printf("Zonesize=%d\n", BLOCK_SIZE << SB_ZONE_SIZE);
|
---|
| 603 | printf("Maxsize=%ld\n", (long)SB_MAXSIZE);
|
---|
| 604 | }
|
---|
| 605 |
|
---|
| 606 | int mkfs_minix_main(int argc, char **argv);
|
---|
[821] | 607 | int mkfs_minix_main(int argc, char **argv)
|
---|
| 608 | {
|
---|
[1765] | 609 | struct mntent *mp;
|
---|
| 610 | unsigned opt;
|
---|
[821] | 611 | char *tmp;
|
---|
| 612 | struct stat statbuf;
|
---|
[1765] | 613 | char *str_i, *str_n;
|
---|
[821] | 614 | char *listfile = NULL;
|
---|
| 615 |
|
---|
[1765] | 616 | PTR_TO_GLOBALS = xzalloc(sizeof(G));
|
---|
| 617 | /* default (changed to 30, per Linus's suggestion, Sun Nov 21 08:05:07 1993) */
|
---|
| 618 | G.namelen = 30;
|
---|
| 619 | G.dirsize = 32;
|
---|
| 620 | G.magic = MINIX1_SUPER_MAGIC2;
|
---|
| 621 |
|
---|
| 622 | if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
[821] | 623 | bb_error_msg_and_die("bad inode size");
|
---|
[1765] | 624 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 625 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
| 626 | bb_error_msg_and_die("bad inode size");
|
---|
| 627 | #endif
|
---|
| 628 |
|
---|
[1765] | 629 | opt = getopt32(argv, "ci:l:n:v", &str_i, &listfile, &str_n);
|
---|
| 630 | argv += optind;
|
---|
| 631 | //if (opt & 1) -c
|
---|
| 632 | if (opt & 2) G.req_nr_inodes = xatoul(str_i); // -i
|
---|
| 633 | //if (opt & 4) -l
|
---|
| 634 | if (opt & 8) { // -n
|
---|
| 635 | G.namelen = xatoi_u(str_n);
|
---|
| 636 | if (G.namelen == 14) G.magic = MINIX1_SUPER_MAGIC;
|
---|
| 637 | else if (G.namelen == 30) G.magic = MINIX1_SUPER_MAGIC2;
|
---|
| 638 | else bb_show_usage();
|
---|
| 639 | G.dirsize = G.namelen + 2;
|
---|
| 640 | }
|
---|
| 641 | if (opt & 0x10) { // -v
|
---|
| 642 | #if ENABLE_FEATURE_MINIX2
|
---|
| 643 | version2 = 1;
|
---|
[821] | 644 | #else
|
---|
[1765] | 645 | bb_error_msg_and_die("not compiled with minix v2 support");
|
---|
[821] | 646 | #endif
|
---|
| 647 | }
|
---|
| 648 |
|
---|
[1765] | 649 | G.device_name = *argv++;
|
---|
| 650 | if (!G.device_name)
|
---|
[821] | 651 | bb_show_usage();
|
---|
[1765] | 652 | if (*argv)
|
---|
| 653 | G.total_blocks = xatou32(*argv);
|
---|
| 654 | else
|
---|
| 655 | G.total_blocks = get_size(G.device_name) / 1024;
|
---|
| 656 |
|
---|
| 657 | if (G.total_blocks < 10)
|
---|
| 658 | bb_error_msg_and_die("must have at least 10 blocks");
|
---|
| 659 |
|
---|
[821] | 660 | if (version2) {
|
---|
[1765] | 661 | G.magic = MINIX2_SUPER_MAGIC2;
|
---|
| 662 | if (G.namelen == 14)
|
---|
| 663 | G.magic = MINIX2_SUPER_MAGIC;
|
---|
| 664 | } else if (G.total_blocks > 65535)
|
---|
| 665 | G.total_blocks = 65535;
|
---|
| 666 |
|
---|
| 667 | /* Check if it is mounted */
|
---|
| 668 | mp = find_mount_point(G.device_name, NULL);
|
---|
| 669 | if (mp && strcmp(G.device_name, mp->mnt_fsname) == 0)
|
---|
| 670 | bb_error_msg_and_die("%s is mounted on %s; "
|
---|
| 671 | "refusing to make a filesystem",
|
---|
| 672 | G.device_name, mp->mnt_dir);
|
---|
| 673 |
|
---|
| 674 | G.dev_fd = xopen(G.device_name, O_RDWR);
|
---|
| 675 | if (fstat(G.dev_fd, &statbuf) < 0)
|
---|
| 676 | bb_error_msg_and_die("cannot stat %s", G.device_name);
|
---|
| 677 | if (!S_ISBLK(statbuf.st_mode))
|
---|
| 678 | opt &= ~1; // clear -c (check)
|
---|
| 679 |
|
---|
| 680 | /* I don't know why someone has special code to prevent mkfs.minix
|
---|
| 681 | * on IDE devices. Why IDE but not SCSI, etc?... */
|
---|
| 682 | #if 0
|
---|
| 683 | else if (statbuf.st_rdev == 0x0300 || statbuf.st_rdev == 0x0340)
|
---|
| 684 | /* what is this? */
|
---|
| 685 | bb_error_msg_and_die("will not try "
|
---|
| 686 | "to make filesystem on '%s'", G.device_name);
|
---|
[821] | 687 | #endif
|
---|
[1765] | 688 |
|
---|
| 689 | tmp = G.root_block;
|
---|
[821] | 690 | *(short *) tmp = 1;
|
---|
| 691 | strcpy(tmp + 2, ".");
|
---|
[1765] | 692 | tmp += G.dirsize;
|
---|
[821] | 693 | *(short *) tmp = 1;
|
---|
| 694 | strcpy(tmp + 2, "..");
|
---|
[1765] | 695 | tmp += G.dirsize;
|
---|
[821] | 696 | *(short *) tmp = 2;
|
---|
| 697 | strcpy(tmp + 2, ".badblocks");
|
---|
[1765] | 698 |
|
---|
[821] | 699 | setup_tables();
|
---|
[1765] | 700 |
|
---|
| 701 | if (opt & 1) // -c ?
|
---|
[821] | 702 | check_blocks();
|
---|
| 703 | else if (listfile)
|
---|
| 704 | get_list_blocks(listfile);
|
---|
[1765] | 705 |
|
---|
[821] | 706 | if (version2) {
|
---|
| 707 | make_root_inode2();
|
---|
| 708 | make_bad_inode2();
|
---|
[1765] | 709 | } else {
|
---|
[821] | 710 | make_root_inode();
|
---|
| 711 | make_bad_inode();
|
---|
| 712 | }
|
---|
[1765] | 713 |
|
---|
[821] | 714 | mark_good_blocks();
|
---|
| 715 | write_tables();
|
---|
| 716 | return 0;
|
---|
| 717 | }
|
---|