[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * fsck.c - a file system consistency checker for Linux.
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| 4 | *
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[1765] | 5 | * (C) 1991, 1992 Linus Torvalds.
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| 6 | *
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[2725] | 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 | * 09.11.91 - made the first rudimentary functions
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| 12 | *
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| 13 | * 10.11.91 - updated, does checking, no repairs yet.
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| 14 | * Sent out to the mailing-list for testing.
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| 15 | *
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[3232] | 16 | * 14.11.91 - Testing seems to have gone well. Added some
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[821] | 17 | * correction-code, and changed some functions.
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| 18 | *
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| 19 | * 15.11.91 - More correction code. Hopefully it notices most
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| 20 | * cases now, and tries to do something about them.
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| 21 | *
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| 22 | * 16.11.91 - More corrections (thanks to Mika Jalava). Most
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| 23 | * things seem to work now. Yeah, sure.
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| 24 | *
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[3232] | 25 | * 19.04.92 - Had to start over again from this old version, as a
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[821] | 26 | * kernel bug ate my enhanced fsck in february.
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| 27 | *
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[3232] | 28 | * 28.02.93 - added support for different directory entry sizes..
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[821] | 29 | *
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| 30 | * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
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[2725] | 31 | * superblock information
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[821] | 32 | *
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| 33 | * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
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| 34 | * to that required by fsutil
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| 35 | *
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| 36 | * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
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[3232] | 37 | * Added support for file system valid flag. Also
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| 38 | * added program_version variable and output of
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| 39 | * program name and version number when program
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| 40 | * is executed.
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[821] | 41 | *
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[3232] | 42 | * 30.10.94 - added support for v2 filesystem
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| 43 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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[821] | 44 | *
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[3232] | 45 | * 10.12.94 - added test to prevent checking of mounted fs adapted
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| 46 | * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
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| 47 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
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[821] | 48 | *
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| 49 | * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
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[3232] | 50 | * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
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[821] | 51 | *
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| 52 | * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
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| 53 | * (Russell King). He made them for ARM. It would seem
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[3232] | 54 | * that the ARM is powerful enough to do this in C whereas
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[821] | 55 | * i386 and m64k must use assembly to get it fast >:-)
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[3232] | 56 | * This should make minix fsck system-independent.
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| 57 | * (janl@math.uio.no, Nicolai Langfeldt)
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[821] | 58 | *
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| 59 | * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
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| 60 | * warnings. Added mc68k bitops from
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[3232] | 61 | * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
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[821] | 62 | *
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| 63 | * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
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| 64 | * Andreas Schwab.
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| 65 | *
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[2725] | 66 | * 1999-02-22 Arkadiusz Mickiewicz <misiek@misiek.eu.org>
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[821] | 67 | * - added Native Language Support
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| 68 | *
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| 69 | *
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| 70 | * I've had no time to add comments - hopefully the function names
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| 71 | * are comments enough. As with all file system checkers, this assumes
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| 72 | * the file system is quiescent - don't use it on a mounted device
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| 73 | * unless you can be sure nobody is writing to it (and remember that the
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| 74 | * kernel can write to it when it searches for files).
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| 75 | *
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| 76 | * Usage: fsck [-larvsm] device
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| 77 | * -l for a listing of all the filenames
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| 78 | * -a for automatic repairs (not implemented)
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| 79 | * -r for repairs (interactive) (not implemented)
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| 80 | * -v for verbose (tells how many files)
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[2725] | 81 | * -s for superblock info
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[821] | 82 | * -m for minix-like "mode not cleared" warnings
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| 83 | * -f force filesystem check even if filesystem marked as valid
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| 84 | *
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| 85 | * The device may be a block device or a image of one, but this isn't
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| 86 | * enforced (but it's not much fun on a character device :-).
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| 87 | */
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| 88 |
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[3232] | 89 | //usage:#define fsck_minix_trivial_usage
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| 90 | //usage: "[-larvsmf] BLOCKDEV"
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| 91 | //usage:#define fsck_minix_full_usage "\n\n"
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| 92 | //usage: "Check MINIX filesystem\n"
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| 93 | //usage: "\n -l List all filenames"
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| 94 | //usage: "\n -r Perform interactive repairs"
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| 95 | //usage: "\n -a Perform automatic repairs"
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| 96 | //usage: "\n -v Verbose"
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| 97 | //usage: "\n -s Output superblock information"
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| 98 | //usage: "\n -m Show \"mode not cleared\" warnings"
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| 99 | //usage: "\n -f Force file system check"
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| 100 |
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[821] | 101 | #include <mntent.h>
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[1765] | 102 | #include "libbb.h"
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| 103 | #include "minix.h"
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[821] | 104 |
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[1765] | 105 | #ifndef BLKGETSIZE
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| 106 | #define BLKGETSIZE _IO(0x12,96) /* return device size */
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| 107 | #endif
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[821] | 108 |
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[2725] | 109 | struct BUG_bad_inode_size {
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| 110 | char BUG_bad_inode1_size[(INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
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| 111 | #if ENABLE_FEATURE_MINIX2
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| 112 | char BUG_bad_inode2_size[(INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE) ? -1 : 1];
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| 113 | #endif
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| 114 | };
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| 115 |
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[821] | 116 | enum {
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[1765] | 117 | #ifdef UNUSED
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| 118 | MINIX1_LINK_MAX = 250,
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[821] | 119 | MINIX2_LINK_MAX = 65530,
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| 120 | MINIX_I_MAP_SLOTS = 8,
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| 121 | MINIX_Z_MAP_SLOTS = 64,
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[1765] | 122 | MINIX_V1 = 0x0001, /* original minix fs */
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| 123 | MINIX_V2 = 0x0002, /* minix V2 fs */
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| 124 | #endif
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| 125 | MINIX_NAME_MAX = 255, /* # chars in a file name */
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| 126 | };
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[821] | 127 |
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[2725] | 128 |
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[1765] | 129 | #if !ENABLE_FEATURE_MINIX2
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| 130 | enum { version2 = 0 };
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| 131 | #endif
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[821] | 132 |
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[1765] | 133 | enum { MAX_DEPTH = 32 };
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[821] | 134 |
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[2725] | 135 | enum { dev_fd = 3 };
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| 136 |
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[1765] | 137 | struct globals {
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| 138 | #if ENABLE_FEATURE_MINIX2
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| 139 | smallint version2;
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| 140 | #endif
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| 141 | smallint changed; /* is filesystem modified? */
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| 142 | smallint errors_uncorrected; /* flag if some error was not corrected */
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| 143 | smallint termios_set;
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| 144 | smallint dirsize;
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| 145 | smallint namelen;
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[2725] | 146 | const char *device_name;
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[1765] | 147 | int directory, regular, blockdev, chardev, links, symlinks, total;
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| 148 | char *inode_buffer;
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[821] | 149 |
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[1765] | 150 | char *inode_map;
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| 151 | char *zone_map;
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[821] | 152 |
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[1765] | 153 | unsigned char *inode_count;
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| 154 | unsigned char *zone_count;
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[821] | 155 |
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[1765] | 156 | /* File-name data */
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| 157 | int name_depth;
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| 158 | char *name_component[MAX_DEPTH+1];
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[821] | 159 |
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[1765] | 160 | /* Bigger stuff */
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| 161 | struct termios sv_termios;
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[2725] | 162 | char superblock_buffer[BLOCK_SIZE];
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[1765] | 163 | char add_zone_ind_blk[BLOCK_SIZE];
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| 164 | char add_zone_dind_blk[BLOCK_SIZE];
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[2725] | 165 | IF_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
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[1765] | 166 | char check_file_blk[BLOCK_SIZE];
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[821] | 167 |
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[1765] | 168 | /* File-name data */
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| 169 | char current_name[MAX_DEPTH * MINIX_NAME_MAX];
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| 170 | };
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| 171 | #define G (*ptr_to_globals)
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| 172 | #if ENABLE_FEATURE_MINIX2
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| 173 | #define version2 (G.version2 )
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[821] | 174 | #endif
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[1765] | 175 | #define changed (G.changed )
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| 176 | #define errors_uncorrected (G.errors_uncorrected )
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| 177 | #define termios_set (G.termios_set )
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| 178 | #define dirsize (G.dirsize )
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| 179 | #define namelen (G.namelen )
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| 180 | #define device_name (G.device_name )
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| 181 | #define directory (G.directory )
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| 182 | #define regular (G.regular )
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| 183 | #define blockdev (G.blockdev )
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| 184 | #define chardev (G.chardev )
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| 185 | #define links (G.links )
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| 186 | #define symlinks (G.symlinks )
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| 187 | #define total (G.total )
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| 188 | #define inode_buffer (G.inode_buffer )
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| 189 | #define inode_map (G.inode_map )
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| 190 | #define zone_map (G.zone_map )
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| 191 | #define inode_count (G.inode_count )
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| 192 | #define zone_count (G.zone_count )
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| 193 | #define name_depth (G.name_depth )
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| 194 | #define name_component (G.name_component )
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| 195 | #define sv_termios (G.sv_termios )
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[2725] | 196 | #define superblock_buffer (G.superblock_buffer )
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[1765] | 197 | #define add_zone_ind_blk (G.add_zone_ind_blk )
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| 198 | #define add_zone_dind_blk (G.add_zone_dind_blk )
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| 199 | #define add_zone_tind_blk (G.add_zone_tind_blk )
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| 200 | #define check_file_blk (G.check_file_blk )
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| 201 | #define current_name (G.current_name )
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| 202 | #define INIT_G() do { \
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[2725] | 203 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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[1765] | 204 | dirsize = 16; \
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| 205 | namelen = 14; \
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| 206 | current_name[0] = '/'; \
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| 207 | /*current_name[1] = '\0';*/ \
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| 208 | name_component[0] = ¤t_name[0]; \
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| 209 | } while (0)
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[821] | 210 |
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[2725] | 211 |
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| 212 | #define OPTION_STR "larvsmf"
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| 213 | enum {
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| 214 | OPT_l = (1 << 0),
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| 215 | OPT_a = (1 << 1),
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| 216 | OPT_r = (1 << 2),
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| 217 | OPT_v = (1 << 3),
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| 218 | OPT_s = (1 << 4),
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| 219 | OPT_w = (1 << 5),
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| 220 | OPT_f = (1 << 6),
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| 221 | };
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| 222 | #define OPT_list (option_mask32 & OPT_l)
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| 223 | #define OPT_automatic (option_mask32 & OPT_a)
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| 224 | #define OPT_repair (option_mask32 & OPT_r)
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| 225 | #define OPT_verbose (option_mask32 & OPT_v)
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| 226 | #define OPT_show (option_mask32 & OPT_s)
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| 227 | #define OPT_warn_mode (option_mask32 & OPT_w)
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| 228 | #define OPT_force (option_mask32 & OPT_f)
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| 229 | /* non-automatic repairs requested? */
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| 230 | #define OPT_manual ((option_mask32 & (OPT_a|OPT_r)) == OPT_r)
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| 231 |
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| 232 |
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[1765] | 233 | #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
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| 234 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
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[821] | 235 |
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[2725] | 236 | #define Super (*(struct minix_superblock *)(superblock_buffer))
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[821] | 237 |
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[1765] | 238 | #if ENABLE_FEATURE_MINIX2
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| 239 | # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
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[821] | 240 | #else
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[1765] | 241 | # define ZONES ((unsigned)(Super.s_nzones))
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[821] | 242 | #endif
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[1765] | 243 | #define INODES ((unsigned)Super.s_ninodes)
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| 244 | #define IMAPS ((unsigned)Super.s_imap_blocks)
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| 245 | #define ZMAPS ((unsigned)Super.s_zmap_blocks)
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| 246 | #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
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| 247 | #define ZONESIZE ((unsigned)Super.s_log_zone_size)
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| 248 | #define MAXSIZE ((unsigned)Super.s_max_size)
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| 249 | #define MAGIC (Super.s_magic)
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[821] | 250 |
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[1765] | 251 | /* gcc likes this more (code is smaller) than macro variant */
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| 252 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
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| 253 | {
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| 254 | return (size + n-1) / n;
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| 255 | }
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[821] | 256 |
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[2725] | 257 | #if !ENABLE_FEATURE_MINIX2
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| 258 | #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
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[821] | 259 | #else
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[2725] | 260 | #define INODE_BLOCKS div_roundup(INODES, \
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| 261 | (version2 ? MINIX2_INODES_PER_BLOCK : MINIX1_INODES_PER_BLOCK))
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[821] | 262 | #endif
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| 263 |
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[2725] | 264 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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| 265 | #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
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[821] | 266 |
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[1765] | 267 | /* Before you ask "where they come from?": */
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| 268 | /* setbit/clrbit are supplied by sys/param.h */
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[821] | 269 |
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[1765] | 270 | static int minix_bit(const char *a, unsigned i)
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[821] | 271 | {
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[1765] | 272 | return (a[i >> 3] & (1<<(i & 7)));
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[821] | 273 | }
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| 274 |
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[1765] | 275 | static void minix_setbit(char *a, unsigned i)
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[821] | 276 | {
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[1765] | 277 | setbit(a, i);
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| 278 | changed = 1;
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[821] | 279 | }
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[1765] | 280 | static void minix_clrbit(char *a, unsigned i)
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[821] | 281 | {
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[1765] | 282 | clrbit(a, i);
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| 283 | changed = 1;
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[821] | 284 | }
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| 285 |
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[1765] | 286 | /* Note: do not assume 0/1, it is 0/nonzero */
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| 287 | #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
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| 288 | #define inode_in_use(x) (minix_bit(inode_map,(x)))
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[821] | 289 |
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[1765] | 290 | #define mark_inode(x) (minix_setbit(inode_map,(x)))
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| 291 | #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
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[821] | 292 |
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[1765] | 293 | #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
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| 294 | #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
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| 295 |
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| 296 |
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| 297 | static void recursive_check(unsigned ino);
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| 298 | #if ENABLE_FEATURE_MINIX2
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| 299 | static void recursive_check2(unsigned ino);
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| 300 | #endif
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| 301 |
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[2725] | 302 | static void die(const char *str) NORETURN;
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[1765] | 303 | static void die(const char *str)
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[821] | 304 | {
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[1765] | 305 | if (termios_set)
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[2725] | 306 | tcsetattr_stdin_TCSANOW(&sv_termios);
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[1765] | 307 | bb_error_msg_and_die("%s", str);
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[821] | 308 | }
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| 309 |
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| 310 | static void push_filename(const char *name)
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| 311 | {
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| 312 | // /dir/dir/dir/file
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| 313 | // ^ ^ ^
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| 314 | // [0] [1] [2] <-name_component[i]
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| 315 | if (name_depth < MAX_DEPTH) {
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| 316 | int len;
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| 317 | char *p = name_component[name_depth];
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| 318 | *p++ = '/';
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| 319 | len = sprintf(p, "%.*s", namelen, name);
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| 320 | name_component[name_depth + 1] = p + len;
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| 321 | }
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| 322 | name_depth++;
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| 323 | }
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| 324 |
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[1765] | 325 | static void pop_filename(void)
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| 326 | {
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[821] | 327 | name_depth--;
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| 328 | if (name_depth < MAX_DEPTH) {
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| 329 | *name_component[name_depth] = '\0';
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| 330 | if (!name_depth) {
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| 331 | current_name[0] = '/';
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| 332 | current_name[1] = '\0';
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| 333 | }
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| 334 | }
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| 335 | }
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| 336 |
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| 337 | static int ask(const char *string, int def)
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| 338 | {
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| 339 | int c;
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| 340 |
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[2725] | 341 | if (!OPT_repair) {
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| 342 | bb_putchar('\n');
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[821] | 343 | errors_uncorrected = 1;
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| 344 | return 0;
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| 345 | }
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[2725] | 346 | if (OPT_automatic) {
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| 347 | bb_putchar('\n');
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[821] | 348 | if (!def)
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| 349 | errors_uncorrected = 1;
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| 350 | return def;
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| 351 | }
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| 352 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
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| 353 | for (;;) {
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[2725] | 354 | fflush_all();
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[1765] | 355 | c = getchar();
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| 356 | if (c == EOF) {
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[821] | 357 | if (!def)
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| 358 | errors_uncorrected = 1;
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| 359 | return def;
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| 360 | }
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[2725] | 361 | if (c == '\n')
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| 362 | break;
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| 363 | c |= 0x20; /* tolower */
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| 364 | if (c == 'y') {
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[821] | 365 | def = 1;
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| 366 | break;
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[2725] | 367 | }
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| 368 | if (c == 'n') {
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[821] | 369 | def = 0;
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| 370 | break;
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[2725] | 371 | }
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[821] | 372 | }
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| 373 | if (def)
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| 374 | printf("y\n");
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| 375 | else {
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| 376 | printf("n\n");
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| 377 | errors_uncorrected = 1;
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| 378 | }
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| 379 | return def;
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| 380 | }
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| 381 |
|
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| 382 | /*
|
---|
| 383 | * Make certain that we aren't checking a filesystem that is on a
|
---|
| 384 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
|
---|
| 385 | * 1994 Theodore Ts'o. Also licensed under GPL.
|
---|
| 386 | */
|
---|
| 387 | static void check_mount(void)
|
---|
| 388 | {
|
---|
[2725] | 389 | if (find_mount_point(device_name, 0)) {
|
---|
| 390 | int cont;
|
---|
| 391 | #if ENABLE_FEATURE_MTAB_SUPPORT
|
---|
| 392 | /*
|
---|
| 393 | * If the root is mounted read-only, then /etc/mtab is
|
---|
| 394 | * probably not correct; so we won't issue a warning based on
|
---|
| 395 | * it.
|
---|
| 396 | */
|
---|
| 397 | int fd = open(bb_path_mtab_file, O_RDWR);
|
---|
[821] | 398 |
|
---|
[2725] | 399 | if (fd < 0 && errno == EROFS)
|
---|
| 400 | return;
|
---|
| 401 | close(fd);
|
---|
| 402 | #endif
|
---|
| 403 | printf("%s is mounted. ", device_name);
|
---|
| 404 | cont = 0;
|
---|
| 405 | if (isatty(0) && isatty(1))
|
---|
| 406 | cont = ask("Do you really want to continue", 0);
|
---|
| 407 | if (!cont) {
|
---|
| 408 | printf("Check aborted\n");
|
---|
| 409 | exit(EXIT_SUCCESS);
|
---|
| 410 | }
|
---|
[821] | 411 | }
|
---|
| 412 | }
|
---|
| 413 |
|
---|
| 414 | /*
|
---|
| 415 | * check_zone_nr checks to see that *nr is a valid zone nr. If it
|
---|
| 416 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
|
---|
| 417 | * if an error was corrected, and returns the zone (0 for no zone
|
---|
| 418 | * or a bad zone-number).
|
---|
| 419 | */
|
---|
[1765] | 420 | static int check_zone_nr2(uint32_t *nr, smallint *corrected)
|
---|
[821] | 421 | {
|
---|
| 422 | const char *msg;
|
---|
| 423 | if (!*nr)
|
---|
| 424 | return 0;
|
---|
| 425 | if (*nr < FIRSTZONE)
|
---|
| 426 | msg = "< FIRSTZONE";
|
---|
| 427 | else if (*nr >= ZONES)
|
---|
| 428 | msg = ">= ZONES";
|
---|
| 429 | else
|
---|
| 430 | return *nr;
|
---|
| 431 | printf("Zone nr %s in file '%s'. ", msg, current_name);
|
---|
| 432 | if (ask("Remove block", 1)) {
|
---|
| 433 | *nr = 0;
|
---|
| 434 | *corrected = 1;
|
---|
| 435 | }
|
---|
| 436 | return 0;
|
---|
| 437 | }
|
---|
| 438 |
|
---|
[1765] | 439 | static int check_zone_nr(uint16_t *nr, smallint *corrected)
|
---|
[821] | 440 | {
|
---|
| 441 | uint32_t nr32 = *nr;
|
---|
| 442 | int r = check_zone_nr2(&nr32, corrected);
|
---|
| 443 | *nr = (uint16_t)nr32;
|
---|
| 444 | return r;
|
---|
| 445 | }
|
---|
| 446 |
|
---|
| 447 | /*
|
---|
| 448 | * read-block reads block nr into the buffer at addr.
|
---|
| 449 | */
|
---|
[2725] | 450 | static void read_block(unsigned nr, void *addr)
|
---|
[821] | 451 | {
|
---|
| 452 | if (!nr) {
|
---|
| 453 | memset(addr, 0, BLOCK_SIZE);
|
---|
| 454 | return;
|
---|
| 455 | }
|
---|
[2725] | 456 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
|
---|
| 457 | if (BLOCK_SIZE != full_read(dev_fd, addr, BLOCK_SIZE)) {
|
---|
| 458 | printf("%s: bad block %u in file '%s'\n",
|
---|
| 459 | bb_msg_read_error, nr, current_name);
|
---|
[821] | 460 | errors_uncorrected = 1;
|
---|
| 461 | memset(addr, 0, BLOCK_SIZE);
|
---|
| 462 | }
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | /*
|
---|
| 466 | * write_block writes block nr to disk.
|
---|
| 467 | */
|
---|
[2725] | 468 | static void write_block(unsigned nr, void *addr)
|
---|
[821] | 469 | {
|
---|
| 470 | if (!nr)
|
---|
| 471 | return;
|
---|
| 472 | if (nr < FIRSTZONE || nr >= ZONES) {
|
---|
| 473 | printf("Internal error: trying to write bad block\n"
|
---|
| 474 | "Write request ignored\n");
|
---|
| 475 | errors_uncorrected = 1;
|
---|
| 476 | return;
|
---|
| 477 | }
|
---|
[2725] | 478 | xlseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET);
|
---|
| 479 | if (BLOCK_SIZE != full_write(dev_fd, addr, BLOCK_SIZE)) {
|
---|
| 480 | printf("%s: bad block %u in file '%s'\n",
|
---|
| 481 | bb_msg_write_error, nr, current_name);
|
---|
[821] | 482 | errors_uncorrected = 1;
|
---|
| 483 | }
|
---|
| 484 | }
|
---|
| 485 |
|
---|
| 486 | /*
|
---|
| 487 | * map_block calculates the absolute block nr of a block in a file.
|
---|
| 488 | * It sets 'changed' if the inode has needed changing, and re-writes
|
---|
| 489 | * any indirect blocks with errors.
|
---|
| 490 | */
|
---|
[1765] | 491 | static int map_block(struct minix1_inode *inode, unsigned blknr)
|
---|
[821] | 492 | {
|
---|
| 493 | uint16_t ind[BLOCK_SIZE >> 1];
|
---|
[1765] | 494 | int block, result;
|
---|
| 495 | smallint blk_chg;
|
---|
[821] | 496 |
|
---|
| 497 | if (blknr < 7)
|
---|
| 498 | return check_zone_nr(inode->i_zone + blknr, &changed);
|
---|
| 499 | blknr -= 7;
|
---|
| 500 | if (blknr < 512) {
|
---|
| 501 | block = check_zone_nr(inode->i_zone + 7, &changed);
|
---|
[2725] | 502 | goto common;
|
---|
[821] | 503 | }
|
---|
| 504 | blknr -= 512;
|
---|
| 505 | block = check_zone_nr(inode->i_zone + 8, &changed);
|
---|
[2725] | 506 | read_block(block, ind); /* double indirect */
|
---|
[821] | 507 | blk_chg = 0;
|
---|
[2725] | 508 | result = check_zone_nr(&ind[blknr / 512], &blk_chg);
|
---|
[821] | 509 | if (blk_chg)
|
---|
[2725] | 510 | write_block(block, ind);
|
---|
[821] | 511 | block = result;
|
---|
[2725] | 512 | common:
|
---|
| 513 | read_block(block, ind);
|
---|
[821] | 514 | blk_chg = 0;
|
---|
[2725] | 515 | result = check_zone_nr(&ind[blknr % 512], &blk_chg);
|
---|
[821] | 516 | if (blk_chg)
|
---|
[2725] | 517 | write_block(block, ind);
|
---|
[821] | 518 | return result;
|
---|
| 519 | }
|
---|
| 520 |
|
---|
[1765] | 521 | #if ENABLE_FEATURE_MINIX2
|
---|
| 522 | static int map_block2(struct minix2_inode *inode, unsigned blknr)
|
---|
[821] | 523 | {
|
---|
| 524 | uint32_t ind[BLOCK_SIZE >> 2];
|
---|
[1765] | 525 | int block, result;
|
---|
| 526 | smallint blk_chg;
|
---|
[821] | 527 |
|
---|
| 528 | if (blknr < 7)
|
---|
| 529 | return check_zone_nr2(inode->i_zone + blknr, &changed);
|
---|
| 530 | blknr -= 7;
|
---|
| 531 | if (blknr < 256) {
|
---|
| 532 | block = check_zone_nr2(inode->i_zone + 7, &changed);
|
---|
[2725] | 533 | goto common2;
|
---|
[821] | 534 | }
|
---|
| 535 | blknr -= 256;
|
---|
[2725] | 536 | if (blknr < 256 * 256) {
|
---|
[821] | 537 | block = check_zone_nr2(inode->i_zone + 8, &changed);
|
---|
[2725] | 538 | goto common1;
|
---|
[821] | 539 | }
|
---|
| 540 | blknr -= 256 * 256;
|
---|
| 541 | block = check_zone_nr2(inode->i_zone + 9, &changed);
|
---|
[2725] | 542 | read_block(block, ind); /* triple indirect */
|
---|
[821] | 543 | blk_chg = 0;
|
---|
[2725] | 544 | result = check_zone_nr2(&ind[blknr / (256 * 256)], &blk_chg);
|
---|
[821] | 545 | if (blk_chg)
|
---|
[2725] | 546 | write_block(block, ind);
|
---|
[821] | 547 | block = result;
|
---|
[2725] | 548 | common1:
|
---|
| 549 | read_block(block, ind); /* double indirect */
|
---|
[821] | 550 | blk_chg = 0;
|
---|
[2725] | 551 | result = check_zone_nr2(&ind[(blknr / 256) % 256], &blk_chg);
|
---|
[821] | 552 | if (blk_chg)
|
---|
[2725] | 553 | write_block(block, ind);
|
---|
[821] | 554 | block = result;
|
---|
[2725] | 555 | common2:
|
---|
| 556 | read_block(block, ind);
|
---|
[821] | 557 | blk_chg = 0;
|
---|
[2725] | 558 | result = check_zone_nr2(&ind[blknr % 256], &blk_chg);
|
---|
[821] | 559 | if (blk_chg)
|
---|
[2725] | 560 | write_block(block, ind);
|
---|
[821] | 561 | return result;
|
---|
| 562 | }
|
---|
| 563 | #endif
|
---|
| 564 |
|
---|
[2725] | 565 | static void write_superblock(void)
|
---|
[821] | 566 | {
|
---|
| 567 | /*
|
---|
| 568 | * Set the state of the filesystem based on whether or not there
|
---|
| 569 | * are uncorrected errors. The filesystem valid flag is
|
---|
| 570 | * unconditionally set if we get this far.
|
---|
| 571 | */
|
---|
[1765] | 572 | Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
|
---|
| 573 | if (!errors_uncorrected)
|
---|
[821] | 574 | Super.s_state &= ~MINIX_ERROR_FS;
|
---|
| 575 |
|
---|
[2725] | 576 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
|
---|
| 577 | if (BLOCK_SIZE != full_write(dev_fd, superblock_buffer, BLOCK_SIZE))
|
---|
| 578 | die("can't write superblock");
|
---|
[821] | 579 | }
|
---|
| 580 |
|
---|
| 581 | static void write_tables(void)
|
---|
| 582 | {
|
---|
[2725] | 583 | write_superblock();
|
---|
[821] | 584 |
|
---|
[1765] | 585 | if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
[2725] | 586 | die("can't write inode map");
|
---|
[1765] | 587 | if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
[2725] | 588 | die("can't write zone map");
|
---|
[1765] | 589 | if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
[2725] | 590 | die("can't write inodes");
|
---|
[821] | 591 | }
|
---|
| 592 |
|
---|
| 593 | static void get_dirsize(void)
|
---|
| 594 | {
|
---|
| 595 | int block;
|
---|
| 596 | char blk[BLOCK_SIZE];
|
---|
| 597 | int size;
|
---|
| 598 |
|
---|
[1765] | 599 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 600 | if (version2)
|
---|
[1765] | 601 | block = Inode2[MINIX_ROOT_INO].i_zone[0];
|
---|
[821] | 602 | else
|
---|
| 603 | #endif
|
---|
[1765] | 604 | block = Inode1[MINIX_ROOT_INO].i_zone[0];
|
---|
[821] | 605 | read_block(block, blk);
|
---|
| 606 | for (size = 16; size < BLOCK_SIZE; size <<= 1) {
|
---|
| 607 | if (strcmp(blk + size + 2, "..") == 0) {
|
---|
| 608 | dirsize = size;
|
---|
| 609 | namelen = size - 2;
|
---|
| 610 | return;
|
---|
| 611 | }
|
---|
| 612 | }
|
---|
| 613 | /* use defaults */
|
---|
| 614 | }
|
---|
| 615 |
|
---|
| 616 | static void read_superblock(void)
|
---|
| 617 | {
|
---|
[2725] | 618 | xlseek(dev_fd, BLOCK_SIZE, SEEK_SET);
|
---|
| 619 | if (BLOCK_SIZE != full_read(dev_fd, superblock_buffer, BLOCK_SIZE))
|
---|
| 620 | die("can't read superblock");
|
---|
[821] | 621 | /* already initialized to:
|
---|
| 622 | namelen = 14;
|
---|
| 623 | dirsize = 16;
|
---|
| 624 | version2 = 0;
|
---|
| 625 | */
|
---|
[1765] | 626 | if (MAGIC == MINIX1_SUPER_MAGIC) {
|
---|
| 627 | } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
|
---|
[821] | 628 | namelen = 30;
|
---|
| 629 | dirsize = 32;
|
---|
[1765] | 630 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 631 | } else if (MAGIC == MINIX2_SUPER_MAGIC) {
|
---|
| 632 | version2 = 1;
|
---|
| 633 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
|
---|
| 634 | namelen = 30;
|
---|
| 635 | dirsize = 32;
|
---|
| 636 | version2 = 1;
|
---|
| 637 | #endif
|
---|
| 638 | } else
|
---|
[2725] | 639 | die("bad magic number in superblock");
|
---|
[821] | 640 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
|
---|
[1765] | 641 | die("only 1k blocks/zones supported");
|
---|
[821] | 642 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
|
---|
[2725] | 643 | die("bad s_imap_blocks field in superblock");
|
---|
[821] | 644 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
|
---|
[2725] | 645 | die("bad s_zmap_blocks field in superblock");
|
---|
[821] | 646 | }
|
---|
| 647 |
|
---|
| 648 | static void read_tables(void)
|
---|
| 649 | {
|
---|
| 650 | inode_map = xzalloc(IMAPS * BLOCK_SIZE);
|
---|
| 651 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
|
---|
| 652 | inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
---|
| 653 | inode_count = xmalloc(INODES + 1);
|
---|
| 654 | zone_count = xmalloc(ZONES);
|
---|
[1765] | 655 | if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
[2725] | 656 | die("can't read inode map");
|
---|
[1765] | 657 | if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
[2725] | 658 | die("can't read zone map");
|
---|
[1765] | 659 | if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
[2725] | 660 | die("can't read inodes");
|
---|
[821] | 661 | if (NORM_FIRSTZONE != FIRSTZONE) {
|
---|
[1765] | 662 | printf("warning: firstzone!=norm_firstzone\n");
|
---|
[821] | 663 | errors_uncorrected = 1;
|
---|
| 664 | }
|
---|
| 665 | get_dirsize();
|
---|
[2725] | 666 | if (OPT_show) {
|
---|
[1765] | 667 | printf("%u inodes\n"
|
---|
| 668 | "%u blocks\n"
|
---|
| 669 | "Firstdatazone=%u (%u)\n"
|
---|
| 670 | "Zonesize=%u\n"
|
---|
| 671 | "Maxsize=%u\n"
|
---|
| 672 | "Filesystem state=%u\n"
|
---|
| 673 | "namelen=%u\n\n",
|
---|
[821] | 674 | INODES,
|
---|
| 675 | ZONES,
|
---|
| 676 | FIRSTZONE, NORM_FIRSTZONE,
|
---|
| 677 | BLOCK_SIZE << ZONESIZE,
|
---|
| 678 | MAXSIZE,
|
---|
| 679 | Super.s_state,
|
---|
| 680 | namelen);
|
---|
| 681 | }
|
---|
| 682 | }
|
---|
| 683 |
|
---|
[2725] | 684 | static void get_inode_common(unsigned nr, uint16_t i_mode)
|
---|
[821] | 685 | {
|
---|
| 686 | total++;
|
---|
| 687 | if (!inode_count[nr]) {
|
---|
| 688 | if (!inode_in_use(nr)) {
|
---|
| 689 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
| 690 | "for file '%s'\n", nr, current_name);
|
---|
[2725] | 691 | if (OPT_repair) {
|
---|
[821] | 692 | if (ask("Mark as 'in use'", 1))
|
---|
| 693 | mark_inode(nr);
|
---|
[1765] | 694 | else
|
---|
| 695 | errors_uncorrected = 1;
|
---|
[821] | 696 | }
|
---|
| 697 | }
|
---|
[2725] | 698 | if (S_ISDIR(i_mode))
|
---|
[821] | 699 | directory++;
|
---|
[2725] | 700 | else if (S_ISREG(i_mode))
|
---|
[821] | 701 | regular++;
|
---|
[2725] | 702 | else if (S_ISCHR(i_mode))
|
---|
[821] | 703 | chardev++;
|
---|
[2725] | 704 | else if (S_ISBLK(i_mode))
|
---|
[821] | 705 | blockdev++;
|
---|
[2725] | 706 | else if (S_ISLNK(i_mode))
|
---|
[821] | 707 | symlinks++;
|
---|
[2725] | 708 | else if (S_ISSOCK(i_mode));
|
---|
| 709 | else if (S_ISFIFO(i_mode));
|
---|
[821] | 710 | else {
|
---|
[2725] | 711 | printf("%s has mode %05o\n", current_name, i_mode);
|
---|
[821] | 712 | }
|
---|
| 713 | } else
|
---|
| 714 | links++;
|
---|
| 715 | if (!++inode_count[nr]) {
|
---|
| 716 | printf("Warning: inode count too big\n");
|
---|
| 717 | inode_count[nr]--;
|
---|
| 718 | errors_uncorrected = 1;
|
---|
| 719 | }
|
---|
[2725] | 720 | }
|
---|
| 721 |
|
---|
| 722 | static struct minix1_inode *get_inode(unsigned nr)
|
---|
| 723 | {
|
---|
| 724 | struct minix1_inode *inode;
|
---|
| 725 |
|
---|
| 726 | if (!nr || nr > INODES)
|
---|
| 727 | return NULL;
|
---|
| 728 | inode = Inode1 + nr;
|
---|
| 729 | get_inode_common(nr, inode->i_mode);
|
---|
[821] | 730 | return inode;
|
---|
| 731 | }
|
---|
| 732 |
|
---|
[1765] | 733 | #if ENABLE_FEATURE_MINIX2
|
---|
| 734 | static struct minix2_inode *get_inode2(unsigned nr)
|
---|
[821] | 735 | {
|
---|
| 736 | struct minix2_inode *inode;
|
---|
| 737 |
|
---|
| 738 | if (!nr || nr > INODES)
|
---|
| 739 | return NULL;
|
---|
| 740 | inode = Inode2 + nr;
|
---|
[2725] | 741 | get_inode_common(nr, inode->i_mode);
|
---|
[821] | 742 | return inode;
|
---|
| 743 | }
|
---|
| 744 | #endif
|
---|
| 745 |
|
---|
| 746 | static void check_root(void)
|
---|
| 747 | {
|
---|
[1765] | 748 | struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
|
---|
[821] | 749 |
|
---|
| 750 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
[1765] | 751 | die("root inode isn't a directory");
|
---|
[821] | 752 | }
|
---|
| 753 |
|
---|
[1765] | 754 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 755 | static void check_root2(void)
|
---|
| 756 | {
|
---|
[1765] | 757 | struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
|
---|
[821] | 758 |
|
---|
| 759 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
[1765] | 760 | die("root inode isn't a directory");
|
---|
[821] | 761 | }
|
---|
[1765] | 762 | #else
|
---|
| 763 | void check_root2(void);
|
---|
[821] | 764 | #endif
|
---|
| 765 |
|
---|
[2725] | 766 | static int add_zone_common(int block, smallint *corrected)
|
---|
[821] | 767 | {
|
---|
| 768 | if (!block)
|
---|
| 769 | return 0;
|
---|
| 770 | if (zone_count[block]) {
|
---|
| 771 | printf("Already used block is reused in file '%s'. ",
|
---|
| 772 | current_name);
|
---|
| 773 | if (ask("Clear", 1)) {
|
---|
| 774 | block = 0;
|
---|
| 775 | *corrected = 1;
|
---|
[2725] | 776 | return -1; /* "please zero out *znr" */
|
---|
[821] | 777 | }
|
---|
| 778 | }
|
---|
| 779 | if (!zone_in_use(block)) {
|
---|
| 780 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
| 781 | block, current_name);
|
---|
| 782 | if (ask("Correct", 1))
|
---|
| 783 | mark_zone(block);
|
---|
| 784 | }
|
---|
| 785 | if (!++zone_count[block])
|
---|
| 786 | zone_count[block]--;
|
---|
| 787 | return block;
|
---|
| 788 | }
|
---|
| 789 |
|
---|
[2725] | 790 | static int add_zone(uint16_t *znr, smallint *corrected)
|
---|
| 791 | {
|
---|
| 792 | int block;
|
---|
| 793 |
|
---|
| 794 | block = check_zone_nr(znr, corrected);
|
---|
| 795 | block = add_zone_common(block, corrected);
|
---|
| 796 | if (block == -1) {
|
---|
| 797 | *znr = 0;
|
---|
| 798 | block = 0;
|
---|
| 799 | }
|
---|
| 800 | return block;
|
---|
| 801 | }
|
---|
| 802 |
|
---|
[1765] | 803 | #if ENABLE_FEATURE_MINIX2
|
---|
| 804 | static int add_zone2(uint32_t *znr, smallint *corrected)
|
---|
[821] | 805 | {
|
---|
| 806 | int block;
|
---|
| 807 |
|
---|
| 808 | block = check_zone_nr2(znr, corrected);
|
---|
[2725] | 809 | block = add_zone_common(block, corrected);
|
---|
| 810 | if (block == -1) {
|
---|
| 811 | *znr = 0;
|
---|
| 812 | block = 0;
|
---|
[821] | 813 | }
|
---|
| 814 | return block;
|
---|
| 815 | }
|
---|
| 816 | #endif
|
---|
| 817 |
|
---|
[1765] | 818 | static void add_zone_ind(uint16_t *znr, smallint *corrected)
|
---|
[821] | 819 | {
|
---|
[1765] | 820 | int i;
|
---|
[821] | 821 | int block;
|
---|
[1765] | 822 | smallint chg_blk = 0;
|
---|
[821] | 823 |
|
---|
| 824 | block = add_zone(znr, corrected);
|
---|
| 825 | if (!block)
|
---|
| 826 | return;
|
---|
[1765] | 827 | read_block(block, add_zone_ind_blk);
|
---|
[821] | 828 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
[1765] | 829 | add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
|
---|
[821] | 830 | if (chg_blk)
|
---|
[1765] | 831 | write_block(block, add_zone_ind_blk);
|
---|
[821] | 832 | }
|
---|
| 833 |
|
---|
[1765] | 834 | #if ENABLE_FEATURE_MINIX2
|
---|
| 835 | static void add_zone_ind2(uint32_t *znr, smallint *corrected)
|
---|
[821] | 836 | {
|
---|
[1765] | 837 | int i;
|
---|
[821] | 838 | int block;
|
---|
[1765] | 839 | smallint chg_blk = 0;
|
---|
[821] | 840 |
|
---|
| 841 | block = add_zone2(znr, corrected);
|
---|
| 842 | if (!block)
|
---|
| 843 | return;
|
---|
[1765] | 844 | read_block(block, add_zone_ind_blk);
|
---|
[821] | 845 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
[1765] | 846 | add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
|
---|
[821] | 847 | if (chg_blk)
|
---|
[1765] | 848 | write_block(block, add_zone_ind_blk);
|
---|
[821] | 849 | }
|
---|
| 850 | #endif
|
---|
| 851 |
|
---|
[1765] | 852 | static void add_zone_dind(uint16_t *znr, smallint *corrected)
|
---|
[821] | 853 | {
|
---|
[1765] | 854 | int i;
|
---|
[821] | 855 | int block;
|
---|
[1765] | 856 | smallint chg_blk = 0;
|
---|
[821] | 857 |
|
---|
| 858 | block = add_zone(znr, corrected);
|
---|
| 859 | if (!block)
|
---|
| 860 | return;
|
---|
[1765] | 861 | read_block(block, add_zone_dind_blk);
|
---|
[821] | 862 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
[1765] | 863 | add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
|
---|
| 864 | if (chg_blk)
|
---|
| 865 | write_block(block, add_zone_dind_blk);
|
---|
[821] | 866 | }
|
---|
| 867 |
|
---|
[1765] | 868 | #if ENABLE_FEATURE_MINIX2
|
---|
| 869 | static void add_zone_dind2(uint32_t *znr, smallint *corrected)
|
---|
[821] | 870 | {
|
---|
[1765] | 871 | int i;
|
---|
[821] | 872 | int block;
|
---|
[1765] | 873 | smallint chg_blk = 0;
|
---|
[821] | 874 |
|
---|
| 875 | block = add_zone2(znr, corrected);
|
---|
| 876 | if (!block)
|
---|
| 877 | return;
|
---|
[1765] | 878 | read_block(block, add_zone_dind_blk);
|
---|
[821] | 879 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
[1765] | 880 | add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
|
---|
| 881 | if (chg_blk)
|
---|
| 882 | write_block(block, add_zone_dind_blk);
|
---|
[821] | 883 | }
|
---|
| 884 |
|
---|
[1765] | 885 | static void add_zone_tind2(uint32_t *znr, smallint *corrected)
|
---|
[821] | 886 | {
|
---|
[1765] | 887 | int i;
|
---|
[821] | 888 | int block;
|
---|
[1765] | 889 | smallint chg_blk = 0;
|
---|
[821] | 890 |
|
---|
| 891 | block = add_zone2(znr, corrected);
|
---|
| 892 | if (!block)
|
---|
| 893 | return;
|
---|
[1765] | 894 | read_block(block, add_zone_tind_blk);
|
---|
[821] | 895 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
[1765] | 896 | add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
|
---|
| 897 | if (chg_blk)
|
---|
| 898 | write_block(block, add_zone_tind_blk);
|
---|
[821] | 899 | }
|
---|
| 900 | #endif
|
---|
| 901 |
|
---|
[1765] | 902 | static void check_zones(unsigned i)
|
---|
[821] | 903 | {
|
---|
[1765] | 904 | struct minix1_inode *inode;
|
---|
[821] | 905 |
|
---|
| 906 | if (!i || i > INODES)
|
---|
| 907 | return;
|
---|
| 908 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
| 909 | return;
|
---|
[1765] | 910 | inode = Inode1 + i;
|
---|
[2725] | 911 | if (!S_ISDIR(inode->i_mode)
|
---|
| 912 | && !S_ISREG(inode->i_mode)
|
---|
| 913 | && !S_ISLNK(inode->i_mode)
|
---|
| 914 | ) {
|
---|
| 915 | return;
|
---|
| 916 | }
|
---|
[821] | 917 | for (i = 0; i < 7; i++)
|
---|
| 918 | add_zone(i + inode->i_zone, &changed);
|
---|
| 919 | add_zone_ind(7 + inode->i_zone, &changed);
|
---|
| 920 | add_zone_dind(8 + inode->i_zone, &changed);
|
---|
| 921 | }
|
---|
| 922 |
|
---|
[1765] | 923 | #if ENABLE_FEATURE_MINIX2
|
---|
| 924 | static void check_zones2(unsigned i)
|
---|
[821] | 925 | {
|
---|
| 926 | struct minix2_inode *inode;
|
---|
| 927 |
|
---|
| 928 | if (!i || i > INODES)
|
---|
| 929 | return;
|
---|
| 930 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
| 931 | return;
|
---|
| 932 | inode = Inode2 + i;
|
---|
| 933 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
|
---|
| 934 | && !S_ISLNK(inode->i_mode))
|
---|
| 935 | return;
|
---|
| 936 | for (i = 0; i < 7; i++)
|
---|
| 937 | add_zone2(i + inode->i_zone, &changed);
|
---|
| 938 | add_zone_ind2(7 + inode->i_zone, &changed);
|
---|
| 939 | add_zone_dind2(8 + inode->i_zone, &changed);
|
---|
| 940 | add_zone_tind2(9 + inode->i_zone, &changed);
|
---|
| 941 | }
|
---|
| 942 | #endif
|
---|
| 943 |
|
---|
[1765] | 944 | static void check_file(struct minix1_inode *dir, unsigned offset)
|
---|
[821] | 945 | {
|
---|
[1765] | 946 | struct minix1_inode *inode;
|
---|
[821] | 947 | int ino;
|
---|
| 948 | char *name;
|
---|
| 949 | int block;
|
---|
| 950 |
|
---|
| 951 | block = map_block(dir, offset / BLOCK_SIZE);
|
---|
[1765] | 952 | read_block(block, check_file_blk);
|
---|
| 953 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
[821] | 954 | ino = *(uint16_t *) (name - 2);
|
---|
| 955 | if (ino > INODES) {
|
---|
| 956 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
| 957 | current_name, namelen, name);
|
---|
| 958 | if (ask("Remove", 1)) {
|
---|
| 959 | *(uint16_t *) (name - 2) = 0;
|
---|
[1765] | 960 | write_block(block, check_file_blk);
|
---|
[821] | 961 | }
|
---|
| 962 | ino = 0;
|
---|
| 963 | }
|
---|
| 964 | push_filename(name);
|
---|
| 965 | inode = get_inode(ino);
|
---|
| 966 | pop_filename();
|
---|
| 967 | if (!offset) {
|
---|
[1765] | 968 | if (inode && LONE_CHAR(name, '.'))
|
---|
[821] | 969 | return;
|
---|
[1765] | 970 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
| 971 | errors_uncorrected = 1;
|
---|
[821] | 972 | }
|
---|
| 973 | if (offset == dirsize) {
|
---|
[1765] | 974 | if (inode && strcmp("..", name) == 0)
|
---|
[821] | 975 | return;
|
---|
[1765] | 976 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
| 977 | errors_uncorrected = 1;
|
---|
[821] | 978 | }
|
---|
| 979 | if (!inode)
|
---|
| 980 | return;
|
---|
| 981 | push_filename(name);
|
---|
[2725] | 982 | if (OPT_list) {
|
---|
| 983 | if (OPT_verbose)
|
---|
[821] | 984 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
| 985 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
| 986 | }
|
---|
| 987 | check_zones(ino);
|
---|
| 988 | if (inode && S_ISDIR(inode->i_mode))
|
---|
| 989 | recursive_check(ino);
|
---|
| 990 | pop_filename();
|
---|
| 991 | }
|
---|
| 992 |
|
---|
[1765] | 993 | #if ENABLE_FEATURE_MINIX2
|
---|
| 994 | static void check_file2(struct minix2_inode *dir, unsigned offset)
|
---|
[821] | 995 | {
|
---|
| 996 | struct minix2_inode *inode;
|
---|
| 997 | int ino;
|
---|
| 998 | char *name;
|
---|
| 999 | int block;
|
---|
| 1000 |
|
---|
| 1001 | block = map_block2(dir, offset / BLOCK_SIZE);
|
---|
[1765] | 1002 | read_block(block, check_file_blk);
|
---|
| 1003 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
[821] | 1004 | ino = *(uint16_t *) (name - 2);
|
---|
| 1005 | if (ino > INODES) {
|
---|
| 1006 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
| 1007 | current_name, namelen, name);
|
---|
| 1008 | if (ask("Remove", 1)) {
|
---|
| 1009 | *(uint16_t *) (name - 2) = 0;
|
---|
[1765] | 1010 | write_block(block, check_file_blk);
|
---|
[821] | 1011 | }
|
---|
| 1012 | ino = 0;
|
---|
| 1013 | }
|
---|
| 1014 | push_filename(name);
|
---|
| 1015 | inode = get_inode2(ino);
|
---|
| 1016 | pop_filename();
|
---|
| 1017 | if (!offset) {
|
---|
[1765] | 1018 | if (inode && LONE_CHAR(name, '.'))
|
---|
[821] | 1019 | return;
|
---|
[1765] | 1020 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
| 1021 | errors_uncorrected = 1;
|
---|
[821] | 1022 | }
|
---|
| 1023 | if (offset == dirsize) {
|
---|
[1765] | 1024 | if (inode && strcmp("..", name) == 0)
|
---|
[821] | 1025 | return;
|
---|
[1765] | 1026 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
| 1027 | errors_uncorrected = 1;
|
---|
[821] | 1028 | }
|
---|
| 1029 | if (!inode)
|
---|
| 1030 | return;
|
---|
| 1031 | push_filename(name);
|
---|
[2725] | 1032 | if (OPT_list) {
|
---|
| 1033 | if (OPT_verbose)
|
---|
[821] | 1034 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
| 1035 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
| 1036 | }
|
---|
| 1037 | check_zones2(ino);
|
---|
| 1038 | if (inode && S_ISDIR(inode->i_mode))
|
---|
| 1039 | recursive_check2(ino);
|
---|
| 1040 | pop_filename();
|
---|
| 1041 | }
|
---|
| 1042 | #endif
|
---|
| 1043 |
|
---|
[1765] | 1044 | static void recursive_check(unsigned ino)
|
---|
[821] | 1045 | {
|
---|
[1765] | 1046 | struct minix1_inode *dir;
|
---|
| 1047 | unsigned offset;
|
---|
[821] | 1048 |
|
---|
[1765] | 1049 | dir = Inode1 + ino;
|
---|
[821] | 1050 | if (!S_ISDIR(dir->i_mode))
|
---|
[1765] | 1051 | die("internal error");
|
---|
[821] | 1052 | if (dir->i_size < 2 * dirsize) {
|
---|
| 1053 | printf("%s: bad directory: size<32", current_name);
|
---|
| 1054 | errors_uncorrected = 1;
|
---|
| 1055 | }
|
---|
| 1056 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
| 1057 | check_file(dir, offset);
|
---|
| 1058 | }
|
---|
| 1059 |
|
---|
[1765] | 1060 | #if ENABLE_FEATURE_MINIX2
|
---|
| 1061 | static void recursive_check2(unsigned ino)
|
---|
[821] | 1062 | {
|
---|
| 1063 | struct minix2_inode *dir;
|
---|
[1765] | 1064 | unsigned offset;
|
---|
[821] | 1065 |
|
---|
| 1066 | dir = Inode2 + ino;
|
---|
| 1067 | if (!S_ISDIR(dir->i_mode))
|
---|
[1765] | 1068 | die("internal error");
|
---|
[821] | 1069 | if (dir->i_size < 2 * dirsize) {
|
---|
| 1070 | printf("%s: bad directory: size<32", current_name);
|
---|
| 1071 | errors_uncorrected = 1;
|
---|
| 1072 | }
|
---|
| 1073 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
| 1074 | check_file2(dir, offset);
|
---|
| 1075 | }
|
---|
| 1076 | #endif
|
---|
| 1077 |
|
---|
| 1078 | static int bad_zone(int i)
|
---|
| 1079 | {
|
---|
[1765] | 1080 | char buffer[BLOCK_SIZE];
|
---|
[821] | 1081 |
|
---|
[2725] | 1082 | xlseek(dev_fd, BLOCK_SIZE * i, SEEK_SET);
|
---|
| 1083 | return (BLOCK_SIZE != full_read(dev_fd, buffer, BLOCK_SIZE));
|
---|
[821] | 1084 | }
|
---|
| 1085 |
|
---|
| 1086 | static void check_counts(void)
|
---|
| 1087 | {
|
---|
| 1088 | int i;
|
---|
| 1089 |
|
---|
| 1090 | for (i = 1; i <= INODES; i++) {
|
---|
[2725] | 1091 | if (OPT_warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
|
---|
[821] | 1092 | printf("Inode %d has non-zero mode. ", i);
|
---|
| 1093 | if (ask("Clear", 1)) {
|
---|
[1765] | 1094 | Inode1[i].i_mode = 0;
|
---|
[821] | 1095 | changed = 1;
|
---|
| 1096 | }
|
---|
| 1097 | }
|
---|
| 1098 | if (!inode_count[i]) {
|
---|
| 1099 | if (!inode_in_use(i))
|
---|
| 1100 | continue;
|
---|
| 1101 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
| 1102 | if (ask("Clear", 1))
|
---|
| 1103 | unmark_inode(i);
|
---|
| 1104 | continue;
|
---|
| 1105 | }
|
---|
| 1106 | if (!inode_in_use(i)) {
|
---|
| 1107 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
| 1108 | if (ask("Set", 1))
|
---|
| 1109 | mark_inode(i);
|
---|
| 1110 | }
|
---|
[1765] | 1111 | if (Inode1[i].i_nlinks != inode_count[i]) {
|
---|
[821] | 1112 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
[1765] | 1113 | i, Inode1[i].i_mode, Inode1[i].i_nlinks,
|
---|
| 1114 | inode_count[i]);
|
---|
[821] | 1115 | if (ask("Set i_nlinks to count", 1)) {
|
---|
[1765] | 1116 | Inode1[i].i_nlinks = inode_count[i];
|
---|
[821] | 1117 | changed = 1;
|
---|
| 1118 | }
|
---|
| 1119 | }
|
---|
| 1120 | }
|
---|
| 1121 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
[1765] | 1122 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
[821] | 1123 | continue;
|
---|
| 1124 | if (!zone_count[i]) {
|
---|
| 1125 | if (bad_zone(i))
|
---|
| 1126 | continue;
|
---|
| 1127 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
| 1128 | if (ask("Unmark", 1))
|
---|
| 1129 | unmark_zone(i);
|
---|
| 1130 | continue;
|
---|
| 1131 | }
|
---|
| 1132 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
[3232] | 1133 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
[821] | 1134 | }
|
---|
| 1135 | }
|
---|
| 1136 |
|
---|
[1765] | 1137 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 1138 | static void check_counts2(void)
|
---|
| 1139 | {
|
---|
| 1140 | int i;
|
---|
| 1141 |
|
---|
| 1142 | for (i = 1; i <= INODES; i++) {
|
---|
[2725] | 1143 | if (OPT_warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
|
---|
[821] | 1144 | printf("Inode %d has non-zero mode. ", i);
|
---|
| 1145 | if (ask("Clear", 1)) {
|
---|
| 1146 | Inode2[i].i_mode = 0;
|
---|
| 1147 | changed = 1;
|
---|
| 1148 | }
|
---|
| 1149 | }
|
---|
| 1150 | if (!inode_count[i]) {
|
---|
| 1151 | if (!inode_in_use(i))
|
---|
| 1152 | continue;
|
---|
| 1153 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
| 1154 | if (ask("Clear", 1))
|
---|
| 1155 | unmark_inode(i);
|
---|
| 1156 | continue;
|
---|
| 1157 | }
|
---|
| 1158 | if (!inode_in_use(i)) {
|
---|
| 1159 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
| 1160 | if (ask("Set", 1))
|
---|
| 1161 | mark_inode(i);
|
---|
| 1162 | }
|
---|
| 1163 | if (Inode2[i].i_nlinks != inode_count[i]) {
|
---|
| 1164 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
[1765] | 1165 | i, Inode2[i].i_mode, Inode2[i].i_nlinks,
|
---|
| 1166 | inode_count[i]);
|
---|
[821] | 1167 | if (ask("Set i_nlinks to count", 1)) {
|
---|
| 1168 | Inode2[i].i_nlinks = inode_count[i];
|
---|
| 1169 | changed = 1;
|
---|
| 1170 | }
|
---|
| 1171 | }
|
---|
| 1172 | }
|
---|
| 1173 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
[1765] | 1174 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
[821] | 1175 | continue;
|
---|
| 1176 | if (!zone_count[i]) {
|
---|
| 1177 | if (bad_zone(i))
|
---|
| 1178 | continue;
|
---|
| 1179 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
| 1180 | if (ask("Unmark", 1))
|
---|
| 1181 | unmark_zone(i);
|
---|
| 1182 | continue;
|
---|
| 1183 | }
|
---|
| 1184 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
[3232] | 1185 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
[821] | 1186 | }
|
---|
| 1187 | }
|
---|
| 1188 | #endif
|
---|
| 1189 |
|
---|
| 1190 | static void check(void)
|
---|
| 1191 | {
|
---|
| 1192 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
| 1193 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
[1765] | 1194 | check_zones(MINIX_ROOT_INO);
|
---|
| 1195 | recursive_check(MINIX_ROOT_INO);
|
---|
[821] | 1196 | check_counts();
|
---|
| 1197 | }
|
---|
| 1198 |
|
---|
[1765] | 1199 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 1200 | static void check2(void)
|
---|
| 1201 | {
|
---|
| 1202 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
| 1203 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
[1765] | 1204 | check_zones2(MINIX_ROOT_INO);
|
---|
| 1205 | recursive_check2(MINIX_ROOT_INO);
|
---|
[821] | 1206 | check_counts2();
|
---|
| 1207 | }
|
---|
[1765] | 1208 | #else
|
---|
| 1209 | void check2(void);
|
---|
[821] | 1210 | #endif
|
---|
| 1211 |
|
---|
[2725] | 1212 | int fsck_minix_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 1213 | int fsck_minix_main(int argc UNUSED_PARAM, char **argv)
|
---|
[821] | 1214 | {
|
---|
| 1215 | struct termios tmp;
|
---|
| 1216 | int retcode = 0;
|
---|
| 1217 |
|
---|
[1765] | 1218 | xfunc_error_retval = 8;
|
---|
[821] | 1219 |
|
---|
[1765] | 1220 | INIT_G();
|
---|
| 1221 |
|
---|
[2725] | 1222 | opt_complementary = "=1:ar"; /* one argument; -a assumes -r */
|
---|
| 1223 | getopt32(argv, OPTION_STR);
|
---|
| 1224 | argv += optind;
|
---|
| 1225 | device_name = argv[0];
|
---|
[1765] | 1226 |
|
---|
[2725] | 1227 | check_mount(); /* trying to check a mounted filesystem? */
|
---|
| 1228 | if (OPT_manual) {
|
---|
[821] | 1229 | if (!isatty(0) || !isatty(1))
|
---|
[1765] | 1230 | die("need terminal for interactive repairs");
|
---|
[821] | 1231 | }
|
---|
[2725] | 1232 | xmove_fd(xopen(device_name, OPT_repair ? O_RDWR : O_RDONLY), dev_fd);
|
---|
[1765] | 1233 |
|
---|
| 1234 | /*sync(); paranoia? */
|
---|
[821] | 1235 | read_superblock();
|
---|
| 1236 |
|
---|
| 1237 | /*
|
---|
| 1238 | * Determine whether or not we should continue with the checking.
|
---|
| 1239 | * This is based on the status of the filesystem valid and error
|
---|
| 1240 | * flags and whether or not the -f switch was specified on the
|
---|
| 1241 | * command line.
|
---|
| 1242 | */
|
---|
[1765] | 1243 | printf("%s: %s\n", applet_name, bb_banner);
|
---|
| 1244 |
|
---|
| 1245 | if (!(Super.s_state & MINIX_ERROR_FS)
|
---|
[2725] | 1246 | && (Super.s_state & MINIX_VALID_FS) && !OPT_force
|
---|
[1765] | 1247 | ) {
|
---|
[2725] | 1248 | if (OPT_repair)
|
---|
[821] | 1249 | printf("%s is clean, check is skipped\n", device_name);
|
---|
[1765] | 1250 | return 0;
|
---|
[2725] | 1251 | } else if (OPT_force)
|
---|
[821] | 1252 | printf("Forcing filesystem check on %s\n", device_name);
|
---|
[2725] | 1253 | else if (OPT_repair)
|
---|
[821] | 1254 | printf("Filesystem on %s is dirty, needs checking\n",
|
---|
[3232] | 1255 | device_name);
|
---|
[821] | 1256 |
|
---|
| 1257 | read_tables();
|
---|
| 1258 |
|
---|
[2725] | 1259 | if (OPT_manual) {
|
---|
[1765] | 1260 | tcgetattr(0, &sv_termios);
|
---|
| 1261 | tmp = sv_termios;
|
---|
[821] | 1262 | tmp.c_lflag &= ~(ICANON | ECHO);
|
---|
[2725] | 1263 | tcsetattr_stdin_TCSANOW(&tmp);
|
---|
[821] | 1264 | termios_set = 1;
|
---|
| 1265 | }
|
---|
[1765] | 1266 |
|
---|
[821] | 1267 | if (version2) {
|
---|
| 1268 | check_root2();
|
---|
| 1269 | check2();
|
---|
[1765] | 1270 | } else {
|
---|
[821] | 1271 | check_root();
|
---|
| 1272 | check();
|
---|
| 1273 | }
|
---|
[1765] | 1274 |
|
---|
[2725] | 1275 | if (OPT_verbose) {
|
---|
[821] | 1276 | int i, free_cnt;
|
---|
| 1277 |
|
---|
| 1278 | for (i = 1, free_cnt = 0; i <= INODES; i++)
|
---|
| 1279 | if (!inode_in_use(i))
|
---|
| 1280 | free_cnt++;
|
---|
[1765] | 1281 | printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
|
---|
[3232] | 1282 | 100 * (INODES - free_cnt) / INODES);
|
---|
[821] | 1283 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
|
---|
| 1284 | if (!zone_in_use(i))
|
---|
| 1285 | free_cnt++;
|
---|
[1765] | 1286 | printf("%6u zones used (%u%%)\n\n"
|
---|
[3232] | 1287 | "%6u regular files\n"
|
---|
| 1288 | "%6u directories\n"
|
---|
| 1289 | "%6u character device files\n"
|
---|
| 1290 | "%6u block device files\n"
|
---|
| 1291 | "%6u links\n"
|
---|
| 1292 | "%6u symbolic links\n"
|
---|
| 1293 | "------\n"
|
---|
| 1294 | "%6u files\n",
|
---|
| 1295 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
|
---|
| 1296 | regular, directory, chardev, blockdev,
|
---|
| 1297 | links - 2 * directory + 1, symlinks,
|
---|
| 1298 | total - 2 * directory + 1);
|
---|
[821] | 1299 | }
|
---|
| 1300 | if (changed) {
|
---|
| 1301 | write_tables();
|
---|
| 1302 | printf("FILE SYSTEM HAS BEEN CHANGED\n");
|
---|
| 1303 | sync();
|
---|
[2725] | 1304 | } else if (OPT_repair)
|
---|
| 1305 | write_superblock();
|
---|
[821] | 1306 |
|
---|
[2725] | 1307 | if (OPT_manual)
|
---|
| 1308 | tcsetattr_stdin_TCSANOW(&sv_termios);
|
---|
[821] | 1309 |
|
---|
| 1310 | if (changed)
|
---|
| 1311 | retcode += 3;
|
---|
| 1312 | if (errors_uncorrected)
|
---|
| 1313 | retcode += 4;
|
---|
| 1314 | return retcode;
|
---|
| 1315 | }
|
---|