[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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| 7 | * Licensed under GPLv2, see file LICENSE in this tarball for details.
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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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| 16 | * 14.11.91 - Testing seems to have gone well. Added some
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| 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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| 25 | *
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| 26 | * 19.04.92 - Had to start over again from this old version, as a
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| 27 | * kernel bug ate my enhanced fsck in february.
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| 28 | *
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| 29 | * 28.02.93 - added support for different directory entry sizes..
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| 30 | *
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| 31 | * Sat Mar 6 18:59:42 1993, faith@cs.unc.edu: Output namelen with
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| 32 | * super-block information
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| 33 | *
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| 34 | * Sat Oct 9 11:17:11 1993, faith@cs.unc.edu: make exit status conform
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| 35 | * to that required by fsutil
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| 36 | *
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| 37 | * Mon Jan 3 11:06:52 1994 - Dr. Wettstein (greg%wind.uucp@plains.nodak.edu)
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| 38 | * Added support for file system valid flag. Also
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| 39 | * added program_version variable and output of
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| 40 | * program name and version number when program
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| 41 | * is executed.
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| 42 | *
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| 43 | * 30.10.94 - added support for v2 filesystem
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| 44 | * (Andreas Schwab, schwab@issan.informatik.uni-dortmund.de)
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| 45 | *
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| 46 | * 10.12.94 - added test to prevent checking of mounted fs adapted
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| 47 | * from Theodore Ts'o's (tytso@athena.mit.edu) e2fsck
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| 48 | * program. (Daniel Quinlan, quinlan@yggdrasil.com)
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| 49 | *
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| 50 | * 01.07.96 - Fixed the v2 fs stuff to use the right #defines and such
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| 51 | * for modern libcs (janl@math.uio.no, Nicolai Langfeldt)
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| 52 | *
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| 53 | * 02.07.96 - Added C bit fiddling routines from rmk@ecs.soton.ac.uk
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| 54 | * (Russell King). He made them for ARM. It would seem
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| 55 | * that the ARM is powerful enough to do this in C whereas
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| 56 | * i386 and m64k must use assembly to get it fast >:-)
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| 57 | * This should make minix fsck system-independent.
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| 58 | * (janl@math.uio.no, Nicolai Langfeldt)
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| 59 | *
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| 60 | * 04.11.96 - Added minor fixes from Andreas Schwab to avoid compiler
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| 61 | * warnings. Added mc68k bitops from
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| 62 | * Joerg Dorchain <dorchain@mpi-sb.mpg.de>.
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| 63 | *
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| 64 | * 06.11.96 - Added v2 code submitted by Joerg Dorchain, but written by
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| 65 | * Andreas Schwab.
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| 66 | *
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| 67 | * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@misiek.eu.org>
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| 68 | * - added Native Language Support
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| 69 | *
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| 70 | *
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| 71 | * I've had no time to add comments - hopefully the function names
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| 72 | * are comments enough. As with all file system checkers, this assumes
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| 73 | * the file system is quiescent - don't use it on a mounted device
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| 74 | * unless you can be sure nobody is writing to it (and remember that the
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| 75 | * kernel can write to it when it searches for files).
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| 76 | *
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| 77 | * Usage: fsck [-larvsm] device
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| 78 | * -l for a listing of all the filenames
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| 79 | * -a for automatic repairs (not implemented)
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| 80 | * -r for repairs (interactive) (not implemented)
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| 81 | * -v for verbose (tells how many files)
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| 82 | * -s for super-block info
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| 83 | * -m for minix-like "mode not cleared" warnings
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| 84 | * -f force filesystem check even if filesystem marked as valid
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| 85 | *
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| 86 | * The device may be a block device or a image of one, but this isn't
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| 87 | * enforced (but it's not much fun on a character device :-).
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| 88 | */
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| 89 |
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| 90 | #include <mntent.h>
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[1765] | 91 | #include "libbb.h"
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| 92 | #include "minix.h"
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[821] | 93 |
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[1765] | 94 | #ifndef BLKGETSIZE
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| 95 | #define BLKGETSIZE _IO(0x12,96) /* return device size */
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| 96 | #endif
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[821] | 97 |
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| 98 | enum {
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[1765] | 99 | #ifdef UNUSED
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| 100 | MINIX1_LINK_MAX = 250,
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[821] | 101 | MINIX2_LINK_MAX = 65530,
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| 102 | MINIX_I_MAP_SLOTS = 8,
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| 103 | MINIX_Z_MAP_SLOTS = 64,
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[1765] | 104 | MINIX_V1 = 0x0001, /* original minix fs */
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| 105 | MINIX_V2 = 0x0002, /* minix V2 fs */
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| 106 | #endif
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| 107 | MINIX_NAME_MAX = 255, /* # chars in a file name */
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| 108 | };
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[821] | 109 |
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[1765] | 110 | #if !ENABLE_FEATURE_MINIX2
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| 111 | enum { version2 = 0 };
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| 112 | #endif
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[821] | 113 |
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[1765] | 114 | enum { MAX_DEPTH = 32 };
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[821] | 115 |
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[1765] | 116 | struct globals {
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| 117 | int dev_fd;
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| 118 | #if ENABLE_FEATURE_MINIX2
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| 119 | smallint version2;
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| 120 | #endif
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| 121 | smallint repair, automatic, verbose, list, show, warn_mode, force;
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| 122 | smallint changed; /* is filesystem modified? */
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| 123 | smallint errors_uncorrected; /* flag if some error was not corrected */
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| 124 | smallint termios_set;
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| 125 | smallint dirsize;
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| 126 | smallint namelen;
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| 127 | char *device_name;
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| 128 | int directory, regular, blockdev, chardev, links, symlinks, total;
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| 129 | char *inode_buffer;
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[821] | 130 |
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[1765] | 131 | char *inode_map;
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| 132 | char *zone_map;
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[821] | 133 |
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[1765] | 134 | unsigned char *inode_count;
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| 135 | unsigned char *zone_count;
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[821] | 136 |
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[1765] | 137 | /* File-name data */
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| 138 | int name_depth;
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| 139 | char *name_component[MAX_DEPTH+1];
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[821] | 140 |
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[1765] | 141 | /* Bigger stuff */
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| 142 | struct termios sv_termios;
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| 143 | char super_block_buffer[BLOCK_SIZE];
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| 144 | char add_zone_ind_blk[BLOCK_SIZE];
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| 145 | char add_zone_dind_blk[BLOCK_SIZE];
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| 146 | USE_FEATURE_MINIX2(char add_zone_tind_blk[BLOCK_SIZE];)
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| 147 | char check_file_blk[BLOCK_SIZE];
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[821] | 148 |
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[1765] | 149 | /* File-name data */
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| 150 | char current_name[MAX_DEPTH * MINIX_NAME_MAX];
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| 151 | };
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[821] | 152 |
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[1765] | 153 | #define G (*ptr_to_globals)
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| 154 | #define dev_fd (G.dev_fd )
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| 155 | #if ENABLE_FEATURE_MINIX2
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| 156 | #define version2 (G.version2 )
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[821] | 157 | #endif
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[1765] | 158 | #define repair (G.repair )
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| 159 | #define automatic (G.automatic )
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| 160 | #define verbose (G.verbose )
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| 161 | #define list (G.list )
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| 162 | #define show (G.show )
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| 163 | #define warn_mode (G.warn_mode )
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| 164 | #define force (G.force )
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| 165 | #define changed (G.changed )
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| 166 | #define errors_uncorrected (G.errors_uncorrected )
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| 167 | #define termios_set (G.termios_set )
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| 168 | #define dirsize (G.dirsize )
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| 169 | #define namelen (G.namelen )
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| 170 | #define device_name (G.device_name )
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| 171 | #define directory (G.directory )
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| 172 | #define regular (G.regular )
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| 173 | #define blockdev (G.blockdev )
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| 174 | #define chardev (G.chardev )
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| 175 | #define links (G.links )
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| 176 | #define symlinks (G.symlinks )
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| 177 | #define total (G.total )
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| 178 | #define inode_buffer (G.inode_buffer )
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| 179 | #define inode_map (G.inode_map )
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| 180 | #define zone_map (G.zone_map )
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| 181 | #define inode_count (G.inode_count )
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| 182 | #define zone_count (G.zone_count )
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| 183 | #define name_depth (G.name_depth )
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| 184 | #define name_component (G.name_component )
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| 185 | #define sv_termios (G.sv_termios )
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| 186 | #define super_block_buffer (G.super_block_buffer )
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| 187 | #define add_zone_ind_blk (G.add_zone_ind_blk )
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| 188 | #define add_zone_dind_blk (G.add_zone_dind_blk )
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| 189 | #define add_zone_tind_blk (G.add_zone_tind_blk )
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| 190 | #define check_file_blk (G.check_file_blk )
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| 191 | #define current_name (G.current_name )
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| 192 | #define INIT_G() do { \
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| 193 | PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
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| 194 | dirsize = 16; \
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| 195 | namelen = 14; \
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| 196 | current_name[0] = '/'; \
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| 197 | /*current_name[1] = '\0';*/ \
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| 198 | name_component[0] = ¤t_name[0]; \
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| 199 | } while (0)
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[821] | 200 |
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[1765] | 201 | #define Inode1 (((struct minix1_inode *) inode_buffer)-1)
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| 202 | #define Inode2 (((struct minix2_inode *) inode_buffer)-1)
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[821] | 203 |
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[1765] | 204 | #define Super (*(struct minix_super_block *)(super_block_buffer))
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[821] | 205 |
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[1765] | 206 | #if ENABLE_FEATURE_MINIX2
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| 207 | # define ZONES ((unsigned)(version2 ? Super.s_zones : Super.s_nzones))
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[821] | 208 | #else
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[1765] | 209 | # define ZONES ((unsigned)(Super.s_nzones))
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[821] | 210 | #endif
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[1765] | 211 | #define INODES ((unsigned)Super.s_ninodes)
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| 212 | #define IMAPS ((unsigned)Super.s_imap_blocks)
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| 213 | #define ZMAPS ((unsigned)Super.s_zmap_blocks)
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| 214 | #define FIRSTZONE ((unsigned)Super.s_firstdatazone)
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| 215 | #define ZONESIZE ((unsigned)Super.s_log_zone_size)
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| 216 | #define MAXSIZE ((unsigned)Super.s_max_size)
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| 217 | #define MAGIC (Super.s_magic)
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[821] | 218 |
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[1765] | 219 | /* gcc likes this more (code is smaller) than macro variant */
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| 220 | static ALWAYS_INLINE unsigned div_roundup(unsigned size, unsigned n)
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| 221 | {
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| 222 | return (size + n-1) / n;
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| 223 | }
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[821] | 224 |
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[1765] | 225 | #if ENABLE_FEATURE_MINIX2
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| 226 | #define INODE_BLOCKS div_roundup(INODES, (version2 ? MINIX2_INODES_PER_BLOCK \
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| 227 | : MINIX1_INODES_PER_BLOCK))
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[821] | 228 | #else
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[1765] | 229 | #define INODE_BLOCKS div_roundup(INODES, MINIX1_INODES_PER_BLOCK)
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[821] | 230 | #endif
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| 231 |
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[1765] | 232 | #define INODE_BUFFER_SIZE (INODE_BLOCKS * BLOCK_SIZE)
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| 233 | #define NORM_FIRSTZONE (2 + IMAPS + ZMAPS + INODE_BLOCKS)
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[821] | 234 |
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[1765] | 235 | /* Before you ask "where they come from?": */
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| 236 | /* setbit/clrbit are supplied by sys/param.h */
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[821] | 237 |
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[1765] | 238 | static int minix_bit(const char *a, unsigned i)
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[821] | 239 | {
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[1765] | 240 | return (a[i >> 3] & (1<<(i & 7)));
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[821] | 241 | }
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| 242 |
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[1765] | 243 | static void minix_setbit(char *a, unsigned i)
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[821] | 244 | {
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[1765] | 245 | setbit(a, i);
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| 246 | changed = 1;
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[821] | 247 | }
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[1765] | 248 | static void minix_clrbit(char *a, unsigned i)
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[821] | 249 | {
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[1765] | 250 | clrbit(a, i);
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| 251 | changed = 1;
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[821] | 252 | }
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| 253 |
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[1765] | 254 | /* Note: do not assume 0/1, it is 0/nonzero */
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| 255 | #define zone_in_use(x) (minix_bit(zone_map,(x)-FIRSTZONE+1))
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| 256 | #define inode_in_use(x) (minix_bit(inode_map,(x)))
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[821] | 257 |
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[1765] | 258 | #define mark_inode(x) (minix_setbit(inode_map,(x)))
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| 259 | #define unmark_inode(x) (minix_clrbit(inode_map,(x)))
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[821] | 260 |
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[1765] | 261 | #define mark_zone(x) (minix_setbit(zone_map,(x)-FIRSTZONE+1))
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| 262 | #define unmark_zone(x) (minix_clrbit(zone_map,(x)-FIRSTZONE+1))
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| 263 |
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| 264 |
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| 265 | static void recursive_check(unsigned ino);
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| 266 | #if ENABLE_FEATURE_MINIX2
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| 267 | static void recursive_check2(unsigned ino);
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| 268 | #endif
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| 269 |
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| 270 | static void die(const char *str) ATTRIBUTE_NORETURN;
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| 271 | static void die(const char *str)
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[821] | 272 | {
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[1765] | 273 | if (termios_set)
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| 274 | tcsetattr(0, TCSANOW, &sv_termios);
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| 275 | bb_error_msg_and_die("%s", str);
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[821] | 276 | }
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| 277 |
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| 278 | static void push_filename(const char *name)
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| 279 | {
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| 280 | // /dir/dir/dir/file
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| 281 | // ^ ^ ^
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| 282 | // [0] [1] [2] <-name_component[i]
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| 283 | if (name_depth < MAX_DEPTH) {
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| 284 | int len;
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| 285 | char *p = name_component[name_depth];
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| 286 | *p++ = '/';
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| 287 | len = sprintf(p, "%.*s", namelen, name);
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| 288 | name_component[name_depth + 1] = p + len;
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| 289 | }
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| 290 | name_depth++;
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| 291 | }
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| 292 |
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[1765] | 293 | static void pop_filename(void)
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| 294 | {
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[821] | 295 | name_depth--;
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| 296 | if (name_depth < MAX_DEPTH) {
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| 297 | *name_component[name_depth] = '\0';
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| 298 | if (!name_depth) {
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| 299 | current_name[0] = '/';
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| 300 | current_name[1] = '\0';
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| 301 | }
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| 302 | }
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| 303 | }
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| 304 |
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| 305 | static int ask(const char *string, int def)
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| 306 | {
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| 307 | int c;
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| 308 |
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| 309 | if (!repair) {
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[1765] | 310 | puts("");
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[821] | 311 | errors_uncorrected = 1;
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| 312 | return 0;
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| 313 | }
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| 314 | if (automatic) {
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[1765] | 315 | puts("");
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[821] | 316 | if (!def)
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| 317 | errors_uncorrected = 1;
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| 318 | return def;
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| 319 | }
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| 320 | printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
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| 321 | for (;;) {
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| 322 | fflush(stdout);
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[1765] | 323 | c = getchar();
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| 324 | if (c == EOF) {
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[821] | 325 | if (!def)
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| 326 | errors_uncorrected = 1;
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| 327 | return def;
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| 328 | }
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| 329 | c = toupper(c);
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| 330 | if (c == 'Y') {
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| 331 | def = 1;
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| 332 | break;
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| 333 | } else if (c == 'N') {
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| 334 | def = 0;
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| 335 | break;
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| 336 | } else if (c == ' ' || c == '\n')
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| 337 | break;
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| 338 | }
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| 339 | if (def)
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| 340 | printf("y\n");
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| 341 | else {
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| 342 | printf("n\n");
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| 343 | errors_uncorrected = 1;
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| 344 | }
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| 345 | return def;
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| 346 | }
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| 347 |
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| 348 | /*
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| 349 | * Make certain that we aren't checking a filesystem that is on a
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| 350 | * mounted partition. Code adapted from e2fsck, Copyright (C) 1993,
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| 351 | * 1994 Theodore Ts'o. Also licensed under GPL.
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| 352 | */
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| 353 | static void check_mount(void)
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| 354 | {
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| 355 | FILE *f;
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| 356 | struct mntent *mnt;
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| 357 | int cont;
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| 358 | int fd;
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| 359 |
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[1765] | 360 | f = setmntent(MOUNTED, "r");
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| 361 | if (f == NULL)
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[821] | 362 | return;
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| 363 | while ((mnt = getmntent(f)) != NULL)
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| 364 | if (strcmp(device_name, mnt->mnt_fsname) == 0)
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| 365 | break;
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| 366 | endmntent(f);
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| 367 | if (!mnt)
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| 368 | return;
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| 369 |
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| 370 | /*
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| 371 | * If the root is mounted read-only, then /etc/mtab is
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| 372 | * probably not correct; so we won't issue a warning based on
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| 373 | * it.
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| 374 | */
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| 375 | fd = open(MOUNTED, O_RDWR);
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| 376 | if (fd < 0 && errno == EROFS)
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| 377 | return;
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[1765] | 378 | close(fd);
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[821] | 379 |
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| 380 | printf("%s is mounted. ", device_name);
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| 381 | cont = 0;
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| 382 | if (isatty(0) && isatty(1))
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| 383 | cont = ask("Do you really want to continue", 0);
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| 384 | if (!cont) {
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| 385 | printf("Check aborted\n");
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| 386 | exit(0);
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| 387 | }
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| 388 | }
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| 389 |
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| 390 | /*
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| 391 | * check_zone_nr checks to see that *nr is a valid zone nr. If it
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| 392 | * isn't, it will possibly be repaired. Check_zone_nr sets *corrected
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| 393 | * if an error was corrected, and returns the zone (0 for no zone
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| 394 | * or a bad zone-number).
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| 395 | */
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[1765] | 396 | static int check_zone_nr2(uint32_t *nr, smallint *corrected)
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[821] | 397 | {
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| 398 | const char *msg;
|
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| 399 | if (!*nr)
|
---|
| 400 | return 0;
|
---|
| 401 | if (*nr < FIRSTZONE)
|
---|
| 402 | msg = "< FIRSTZONE";
|
---|
| 403 | else if (*nr >= ZONES)
|
---|
| 404 | msg = ">= ZONES";
|
---|
| 405 | else
|
---|
| 406 | return *nr;
|
---|
| 407 | printf("Zone nr %s in file '%s'. ", msg, current_name);
|
---|
| 408 | if (ask("Remove block", 1)) {
|
---|
| 409 | *nr = 0;
|
---|
| 410 | *corrected = 1;
|
---|
| 411 | }
|
---|
| 412 | return 0;
|
---|
| 413 | }
|
---|
| 414 |
|
---|
[1765] | 415 | static int check_zone_nr(uint16_t *nr, smallint *corrected)
|
---|
[821] | 416 | {
|
---|
| 417 | uint32_t nr32 = *nr;
|
---|
| 418 | int r = check_zone_nr2(&nr32, corrected);
|
---|
| 419 | *nr = (uint16_t)nr32;
|
---|
| 420 | return r;
|
---|
| 421 | }
|
---|
| 422 |
|
---|
| 423 | /*
|
---|
| 424 | * read-block reads block nr into the buffer at addr.
|
---|
| 425 | */
|
---|
[1765] | 426 | static void read_block(unsigned nr, char *addr)
|
---|
[821] | 427 | {
|
---|
| 428 | if (!nr) {
|
---|
| 429 | memset(addr, 0, BLOCK_SIZE);
|
---|
| 430 | return;
|
---|
| 431 | }
|
---|
[1765] | 432 | if (BLOCK_SIZE * nr != lseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET)) {
|
---|
| 433 | printf("%s: cannot seek to block in file '%s'\n",
|
---|
[821] | 434 | bb_msg_read_error, current_name);
|
---|
| 435 | errors_uncorrected = 1;
|
---|
| 436 | memset(addr, 0, BLOCK_SIZE);
|
---|
[1765] | 437 | } else if (BLOCK_SIZE != read(dev_fd, addr, BLOCK_SIZE)) {
|
---|
[821] | 438 | printf("%s: bad block in file '%s'\n",
|
---|
| 439 | bb_msg_read_error, current_name);
|
---|
| 440 | errors_uncorrected = 1;
|
---|
| 441 | memset(addr, 0, BLOCK_SIZE);
|
---|
| 442 | }
|
---|
| 443 | }
|
---|
| 444 |
|
---|
| 445 | /*
|
---|
| 446 | * write_block writes block nr to disk.
|
---|
| 447 | */
|
---|
[1765] | 448 | static void write_block(unsigned nr, char *addr)
|
---|
[821] | 449 | {
|
---|
| 450 | if (!nr)
|
---|
| 451 | return;
|
---|
| 452 | if (nr < FIRSTZONE || nr >= ZONES) {
|
---|
| 453 | printf("Internal error: trying to write bad block\n"
|
---|
| 454 | "Write request ignored\n");
|
---|
| 455 | errors_uncorrected = 1;
|
---|
| 456 | return;
|
---|
| 457 | }
|
---|
[1765] | 458 | if (BLOCK_SIZE * nr != lseek(dev_fd, BLOCK_SIZE * nr, SEEK_SET))
|
---|
| 459 | die("seek failed in write_block");
|
---|
| 460 | if (BLOCK_SIZE != write(dev_fd, addr, BLOCK_SIZE)) {
|
---|
[821] | 461 | printf("%s: bad block in file '%s'\n",
|
---|
| 462 | bb_msg_write_error, current_name);
|
---|
| 463 | errors_uncorrected = 1;
|
---|
| 464 | }
|
---|
| 465 | }
|
---|
| 466 |
|
---|
| 467 | /*
|
---|
| 468 | * map_block calculates the absolute block nr of a block in a file.
|
---|
| 469 | * It sets 'changed' if the inode has needed changing, and re-writes
|
---|
| 470 | * any indirect blocks with errors.
|
---|
| 471 | */
|
---|
[1765] | 472 | static int map_block(struct minix1_inode *inode, unsigned blknr)
|
---|
[821] | 473 | {
|
---|
| 474 | uint16_t ind[BLOCK_SIZE >> 1];
|
---|
| 475 | uint16_t dind[BLOCK_SIZE >> 1];
|
---|
[1765] | 476 | int block, result;
|
---|
| 477 | smallint blk_chg;
|
---|
[821] | 478 |
|
---|
| 479 | if (blknr < 7)
|
---|
| 480 | return check_zone_nr(inode->i_zone + blknr, &changed);
|
---|
| 481 | blknr -= 7;
|
---|
| 482 | if (blknr < 512) {
|
---|
| 483 | block = check_zone_nr(inode->i_zone + 7, &changed);
|
---|
| 484 | read_block(block, (char *) ind);
|
---|
| 485 | blk_chg = 0;
|
---|
| 486 | result = check_zone_nr(blknr + ind, &blk_chg);
|
---|
| 487 | if (blk_chg)
|
---|
| 488 | write_block(block, (char *) ind);
|
---|
| 489 | return result;
|
---|
| 490 | }
|
---|
| 491 | blknr -= 512;
|
---|
| 492 | block = check_zone_nr(inode->i_zone + 8, &changed);
|
---|
| 493 | read_block(block, (char *) dind);
|
---|
| 494 | blk_chg = 0;
|
---|
| 495 | result = check_zone_nr(dind + (blknr / 512), &blk_chg);
|
---|
| 496 | if (blk_chg)
|
---|
| 497 | write_block(block, (char *) dind);
|
---|
| 498 | block = result;
|
---|
| 499 | read_block(block, (char *) ind);
|
---|
| 500 | blk_chg = 0;
|
---|
| 501 | result = check_zone_nr(ind + (blknr % 512), &blk_chg);
|
---|
| 502 | if (blk_chg)
|
---|
| 503 | write_block(block, (char *) ind);
|
---|
| 504 | return result;
|
---|
| 505 | }
|
---|
| 506 |
|
---|
[1765] | 507 | #if ENABLE_FEATURE_MINIX2
|
---|
| 508 | static int map_block2(struct minix2_inode *inode, unsigned blknr)
|
---|
[821] | 509 | {
|
---|
| 510 | uint32_t ind[BLOCK_SIZE >> 2];
|
---|
| 511 | uint32_t dind[BLOCK_SIZE >> 2];
|
---|
| 512 | uint32_t tind[BLOCK_SIZE >> 2];
|
---|
[1765] | 513 | int block, result;
|
---|
| 514 | smallint blk_chg;
|
---|
[821] | 515 |
|
---|
| 516 | if (blknr < 7)
|
---|
| 517 | return check_zone_nr2(inode->i_zone + blknr, &changed);
|
---|
| 518 | blknr -= 7;
|
---|
| 519 | if (blknr < 256) {
|
---|
| 520 | block = check_zone_nr2(inode->i_zone + 7, &changed);
|
---|
| 521 | read_block(block, (char *) ind);
|
---|
| 522 | blk_chg = 0;
|
---|
| 523 | result = check_zone_nr2(blknr + ind, &blk_chg);
|
---|
| 524 | if (blk_chg)
|
---|
| 525 | write_block(block, (char *) ind);
|
---|
| 526 | return result;
|
---|
| 527 | }
|
---|
| 528 | blknr -= 256;
|
---|
| 529 | if (blknr >= 256 * 256) {
|
---|
| 530 | block = check_zone_nr2(inode->i_zone + 8, &changed);
|
---|
| 531 | read_block(block, (char *) dind);
|
---|
| 532 | blk_chg = 0;
|
---|
| 533 | result = check_zone_nr2(dind + blknr / 256, &blk_chg);
|
---|
| 534 | if (blk_chg)
|
---|
| 535 | write_block(block, (char *) dind);
|
---|
| 536 | block = result;
|
---|
| 537 | read_block(block, (char *) ind);
|
---|
| 538 | blk_chg = 0;
|
---|
| 539 | result = check_zone_nr2(ind + blknr % 256, &blk_chg);
|
---|
| 540 | if (blk_chg)
|
---|
| 541 | write_block(block, (char *) ind);
|
---|
| 542 | return result;
|
---|
| 543 | }
|
---|
| 544 | blknr -= 256 * 256;
|
---|
| 545 | block = check_zone_nr2(inode->i_zone + 9, &changed);
|
---|
| 546 | read_block(block, (char *) tind);
|
---|
| 547 | blk_chg = 0;
|
---|
| 548 | result = check_zone_nr2(tind + blknr / (256 * 256), &blk_chg);
|
---|
| 549 | if (blk_chg)
|
---|
| 550 | write_block(block, (char *) tind);
|
---|
| 551 | block = result;
|
---|
| 552 | read_block(block, (char *) dind);
|
---|
| 553 | blk_chg = 0;
|
---|
| 554 | result = check_zone_nr2(dind + (blknr / 256) % 256, &blk_chg);
|
---|
| 555 | if (blk_chg)
|
---|
| 556 | write_block(block, (char *) dind);
|
---|
| 557 | block = result;
|
---|
| 558 | read_block(block, (char *) ind);
|
---|
| 559 | blk_chg = 0;
|
---|
| 560 | result = check_zone_nr2(ind + blknr % 256, &blk_chg);
|
---|
| 561 | if (blk_chg)
|
---|
| 562 | write_block(block, (char *) ind);
|
---|
| 563 | return result;
|
---|
| 564 | }
|
---|
| 565 | #endif
|
---|
| 566 |
|
---|
| 567 | static void write_super_block(void)
|
---|
| 568 | {
|
---|
| 569 | /*
|
---|
| 570 | * Set the state of the filesystem based on whether or not there
|
---|
| 571 | * are uncorrected errors. The filesystem valid flag is
|
---|
| 572 | * unconditionally set if we get this far.
|
---|
| 573 | */
|
---|
[1765] | 574 | Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
|
---|
| 575 | if (!errors_uncorrected)
|
---|
[821] | 576 | Super.s_state &= ~MINIX_ERROR_FS;
|
---|
| 577 |
|
---|
[1765] | 578 | if (BLOCK_SIZE != lseek(dev_fd, BLOCK_SIZE, SEEK_SET))
|
---|
| 579 | die("seek failed in write_super_block");
|
---|
| 580 | if (BLOCK_SIZE != write(dev_fd, super_block_buffer, BLOCK_SIZE))
|
---|
| 581 | die("cannot write super-block");
|
---|
[821] | 582 | }
|
---|
| 583 |
|
---|
| 584 | static void write_tables(void)
|
---|
| 585 | {
|
---|
| 586 | write_super_block();
|
---|
| 587 |
|
---|
[1765] | 588 | if (IMAPS * BLOCK_SIZE != write(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
| 589 | die("cannot write inode map");
|
---|
| 590 | if (ZMAPS * BLOCK_SIZE != write(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
| 591 | die("cannot write zone map");
|
---|
| 592 | if (INODE_BUFFER_SIZE != write(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
| 593 | die("cannot write inodes");
|
---|
[821] | 594 | }
|
---|
| 595 |
|
---|
| 596 | static void get_dirsize(void)
|
---|
| 597 | {
|
---|
| 598 | int block;
|
---|
| 599 | char blk[BLOCK_SIZE];
|
---|
| 600 | int size;
|
---|
| 601 |
|
---|
[1765] | 602 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 603 | if (version2)
|
---|
[1765] | 604 | block = Inode2[MINIX_ROOT_INO].i_zone[0];
|
---|
[821] | 605 | else
|
---|
| 606 | #endif
|
---|
[1765] | 607 | block = Inode1[MINIX_ROOT_INO].i_zone[0];
|
---|
[821] | 608 | read_block(block, blk);
|
---|
| 609 | for (size = 16; size < BLOCK_SIZE; size <<= 1) {
|
---|
| 610 | if (strcmp(blk + size + 2, "..") == 0) {
|
---|
| 611 | dirsize = size;
|
---|
| 612 | namelen = size - 2;
|
---|
| 613 | return;
|
---|
| 614 | }
|
---|
| 615 | }
|
---|
| 616 | /* use defaults */
|
---|
| 617 | }
|
---|
| 618 |
|
---|
| 619 | static void read_superblock(void)
|
---|
| 620 | {
|
---|
[1765] | 621 | if (BLOCK_SIZE != lseek(dev_fd, BLOCK_SIZE, SEEK_SET))
|
---|
| 622 | die("seek failed");
|
---|
| 623 | if (BLOCK_SIZE != read(dev_fd, super_block_buffer, BLOCK_SIZE))
|
---|
| 624 | die("cannot read super block");
|
---|
[821] | 625 | /* already initialized to:
|
---|
| 626 | namelen = 14;
|
---|
| 627 | dirsize = 16;
|
---|
| 628 | version2 = 0;
|
---|
| 629 | */
|
---|
[1765] | 630 | if (MAGIC == MINIX1_SUPER_MAGIC) {
|
---|
| 631 | } else if (MAGIC == MINIX1_SUPER_MAGIC2) {
|
---|
[821] | 632 | namelen = 30;
|
---|
| 633 | dirsize = 32;
|
---|
[1765] | 634 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 635 | } else if (MAGIC == MINIX2_SUPER_MAGIC) {
|
---|
| 636 | version2 = 1;
|
---|
| 637 | } else if (MAGIC == MINIX2_SUPER_MAGIC2) {
|
---|
| 638 | namelen = 30;
|
---|
| 639 | dirsize = 32;
|
---|
| 640 | version2 = 1;
|
---|
| 641 | #endif
|
---|
| 642 | } else
|
---|
[1765] | 643 | die("bad magic number in super-block");
|
---|
[821] | 644 | if (ZONESIZE != 0 || BLOCK_SIZE != 1024)
|
---|
[1765] | 645 | die("only 1k blocks/zones supported");
|
---|
[821] | 646 | if (IMAPS * BLOCK_SIZE * 8 < INODES + 1)
|
---|
[1765] | 647 | die("bad s_imap_blocks field in super-block");
|
---|
[821] | 648 | if (ZMAPS * BLOCK_SIZE * 8 < ZONES - FIRSTZONE + 1)
|
---|
[1765] | 649 | die("bad s_zmap_blocks field in super-block");
|
---|
[821] | 650 | }
|
---|
| 651 |
|
---|
| 652 | static void read_tables(void)
|
---|
| 653 | {
|
---|
| 654 | inode_map = xzalloc(IMAPS * BLOCK_SIZE);
|
---|
| 655 | zone_map = xzalloc(ZMAPS * BLOCK_SIZE);
|
---|
| 656 | inode_buffer = xmalloc(INODE_BUFFER_SIZE);
|
---|
| 657 | inode_count = xmalloc(INODES + 1);
|
---|
| 658 | zone_count = xmalloc(ZONES);
|
---|
[1765] | 659 | if (IMAPS * BLOCK_SIZE != read(dev_fd, inode_map, IMAPS * BLOCK_SIZE))
|
---|
| 660 | die("cannot read inode map");
|
---|
| 661 | if (ZMAPS * BLOCK_SIZE != read(dev_fd, zone_map, ZMAPS * BLOCK_SIZE))
|
---|
| 662 | die("cannot read zone map");
|
---|
| 663 | if (INODE_BUFFER_SIZE != read(dev_fd, inode_buffer, INODE_BUFFER_SIZE))
|
---|
| 664 | die("cannot read inodes");
|
---|
[821] | 665 | if (NORM_FIRSTZONE != FIRSTZONE) {
|
---|
[1765] | 666 | printf("warning: firstzone!=norm_firstzone\n");
|
---|
[821] | 667 | errors_uncorrected = 1;
|
---|
| 668 | }
|
---|
| 669 | get_dirsize();
|
---|
| 670 | if (show) {
|
---|
[1765] | 671 | printf("%u inodes\n"
|
---|
| 672 | "%u blocks\n"
|
---|
| 673 | "Firstdatazone=%u (%u)\n"
|
---|
| 674 | "Zonesize=%u\n"
|
---|
| 675 | "Maxsize=%u\n"
|
---|
| 676 | "Filesystem state=%u\n"
|
---|
| 677 | "namelen=%u\n\n",
|
---|
[821] | 678 | INODES,
|
---|
| 679 | ZONES,
|
---|
| 680 | FIRSTZONE, NORM_FIRSTZONE,
|
---|
| 681 | BLOCK_SIZE << ZONESIZE,
|
---|
| 682 | MAXSIZE,
|
---|
| 683 | Super.s_state,
|
---|
| 684 | namelen);
|
---|
| 685 | }
|
---|
| 686 | }
|
---|
| 687 |
|
---|
[1765] | 688 | static struct minix1_inode *get_inode(unsigned nr)
|
---|
[821] | 689 | {
|
---|
[1765] | 690 | struct minix1_inode *inode;
|
---|
[821] | 691 |
|
---|
| 692 | if (!nr || nr > INODES)
|
---|
| 693 | return NULL;
|
---|
| 694 | total++;
|
---|
[1765] | 695 | inode = Inode1 + nr;
|
---|
[821] | 696 | if (!inode_count[nr]) {
|
---|
| 697 | if (!inode_in_use(nr)) {
|
---|
| 698 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
| 699 | "for file '%s'\n", nr, current_name);
|
---|
| 700 | if (repair) {
|
---|
| 701 | if (ask("Mark as 'in use'", 1))
|
---|
| 702 | mark_inode(nr);
|
---|
[1765] | 703 | else
|
---|
| 704 | errors_uncorrected = 1;
|
---|
[821] | 705 | }
|
---|
| 706 | }
|
---|
| 707 | if (S_ISDIR(inode->i_mode))
|
---|
| 708 | directory++;
|
---|
| 709 | else if (S_ISREG(inode->i_mode))
|
---|
| 710 | regular++;
|
---|
| 711 | else if (S_ISCHR(inode->i_mode))
|
---|
| 712 | chardev++;
|
---|
| 713 | else if (S_ISBLK(inode->i_mode))
|
---|
| 714 | blockdev++;
|
---|
| 715 | else if (S_ISLNK(inode->i_mode))
|
---|
| 716 | symlinks++;
|
---|
| 717 | else if (S_ISSOCK(inode->i_mode));
|
---|
| 718 | else if (S_ISFIFO(inode->i_mode));
|
---|
| 719 | else {
|
---|
| 720 | printf("%s has mode %05o\n", current_name, inode->i_mode);
|
---|
| 721 | }
|
---|
| 722 |
|
---|
| 723 | } else
|
---|
| 724 | links++;
|
---|
| 725 | if (!++inode_count[nr]) {
|
---|
| 726 | printf("Warning: inode count too big\n");
|
---|
| 727 | inode_count[nr]--;
|
---|
| 728 | errors_uncorrected = 1;
|
---|
| 729 | }
|
---|
| 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 | total++;
|
---|
| 741 | inode = Inode2 + nr;
|
---|
| 742 | if (!inode_count[nr]) {
|
---|
| 743 | if (!inode_in_use(nr)) {
|
---|
| 744 | printf("Inode %d is marked as 'unused', but it is used "
|
---|
| 745 | "for file '%s'\n", nr, current_name);
|
---|
| 746 | if (repair) {
|
---|
| 747 | if (ask("Mark as 'in use'", 1))
|
---|
| 748 | mark_inode(nr);
|
---|
| 749 | else
|
---|
| 750 | errors_uncorrected = 1;
|
---|
| 751 | }
|
---|
| 752 | }
|
---|
| 753 | if (S_ISDIR(inode->i_mode))
|
---|
| 754 | directory++;
|
---|
| 755 | else if (S_ISREG(inode->i_mode))
|
---|
| 756 | regular++;
|
---|
| 757 | else if (S_ISCHR(inode->i_mode))
|
---|
| 758 | chardev++;
|
---|
| 759 | else if (S_ISBLK(inode->i_mode))
|
---|
| 760 | blockdev++;
|
---|
| 761 | else if (S_ISLNK(inode->i_mode))
|
---|
| 762 | symlinks++;
|
---|
| 763 | else if (S_ISSOCK(inode->i_mode));
|
---|
| 764 | else if (S_ISFIFO(inode->i_mode));
|
---|
| 765 | else {
|
---|
| 766 | printf("%s has mode %05o\n", current_name, inode->i_mode);
|
---|
| 767 | }
|
---|
| 768 | } else
|
---|
| 769 | links++;
|
---|
| 770 | if (!++inode_count[nr]) {
|
---|
| 771 | printf("Warning: inode count too big\n");
|
---|
| 772 | inode_count[nr]--;
|
---|
| 773 | errors_uncorrected = 1;
|
---|
| 774 | }
|
---|
| 775 | return inode;
|
---|
| 776 | }
|
---|
| 777 | #endif
|
---|
| 778 |
|
---|
| 779 | static void check_root(void)
|
---|
| 780 | {
|
---|
[1765] | 781 | struct minix1_inode *inode = Inode1 + MINIX_ROOT_INO;
|
---|
[821] | 782 |
|
---|
| 783 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
[1765] | 784 | die("root inode isn't a directory");
|
---|
[821] | 785 | }
|
---|
| 786 |
|
---|
[1765] | 787 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 788 | static void check_root2(void)
|
---|
| 789 | {
|
---|
[1765] | 790 | struct minix2_inode *inode = Inode2 + MINIX_ROOT_INO;
|
---|
[821] | 791 |
|
---|
| 792 | if (!inode || !S_ISDIR(inode->i_mode))
|
---|
[1765] | 793 | die("root inode isn't a directory");
|
---|
[821] | 794 | }
|
---|
[1765] | 795 | #else
|
---|
| 796 | void check_root2(void);
|
---|
[821] | 797 | #endif
|
---|
| 798 |
|
---|
[1765] | 799 | static int add_zone(uint16_t *znr, smallint *corrected)
|
---|
[821] | 800 | {
|
---|
| 801 | int result;
|
---|
| 802 | int block;
|
---|
| 803 |
|
---|
| 804 | result = 0;
|
---|
| 805 | block = check_zone_nr(znr, corrected);
|
---|
| 806 | if (!block)
|
---|
| 807 | return 0;
|
---|
| 808 | if (zone_count[block]) {
|
---|
| 809 | printf("Already used block is reused in file '%s'. ",
|
---|
| 810 | current_name);
|
---|
| 811 | if (ask("Clear", 1)) {
|
---|
| 812 | *znr = 0;
|
---|
| 813 | block = 0;
|
---|
| 814 | *corrected = 1;
|
---|
| 815 | return 0;
|
---|
| 816 | }
|
---|
| 817 | }
|
---|
| 818 | if (!zone_in_use(block)) {
|
---|
| 819 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
| 820 | block, current_name);
|
---|
| 821 | if (ask("Correct", 1))
|
---|
| 822 | mark_zone(block);
|
---|
| 823 | }
|
---|
| 824 | if (!++zone_count[block])
|
---|
| 825 | zone_count[block]--;
|
---|
| 826 | return block;
|
---|
| 827 | }
|
---|
| 828 |
|
---|
[1765] | 829 | #if ENABLE_FEATURE_MINIX2
|
---|
| 830 | static int add_zone2(uint32_t *znr, smallint *corrected)
|
---|
[821] | 831 | {
|
---|
| 832 | int result;
|
---|
| 833 | int block;
|
---|
| 834 |
|
---|
| 835 | result = 0;
|
---|
| 836 | block = check_zone_nr2(znr, corrected);
|
---|
| 837 | if (!block)
|
---|
| 838 | return 0;
|
---|
| 839 | if (zone_count[block]) {
|
---|
| 840 | printf("Already used block is reused in file '%s'. ",
|
---|
| 841 | current_name);
|
---|
| 842 | if (ask("Clear", 1)) {
|
---|
| 843 | *znr = 0;
|
---|
| 844 | block = 0;
|
---|
| 845 | *corrected = 1;
|
---|
| 846 | return 0;
|
---|
| 847 | }
|
---|
| 848 | }
|
---|
| 849 | if (!zone_in_use(block)) {
|
---|
| 850 | printf("Block %d in file '%s' is marked as 'unused'. ",
|
---|
| 851 | block, current_name);
|
---|
| 852 | if (ask("Correct", 1))
|
---|
| 853 | mark_zone(block);
|
---|
| 854 | }
|
---|
| 855 | if (!++zone_count[block])
|
---|
| 856 | zone_count[block]--;
|
---|
| 857 | return block;
|
---|
| 858 | }
|
---|
| 859 | #endif
|
---|
| 860 |
|
---|
[1765] | 861 | static void add_zone_ind(uint16_t *znr, smallint *corrected)
|
---|
[821] | 862 | {
|
---|
[1765] | 863 | int i;
|
---|
[821] | 864 | int block;
|
---|
[1765] | 865 | smallint chg_blk = 0;
|
---|
[821] | 866 |
|
---|
| 867 | block = add_zone(znr, corrected);
|
---|
| 868 | if (!block)
|
---|
| 869 | return;
|
---|
[1765] | 870 | read_block(block, add_zone_ind_blk);
|
---|
[821] | 871 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
[1765] | 872 | add_zone(i + (uint16_t *) add_zone_ind_blk, &chg_blk);
|
---|
[821] | 873 | if (chg_blk)
|
---|
[1765] | 874 | write_block(block, add_zone_ind_blk);
|
---|
[821] | 875 | }
|
---|
| 876 |
|
---|
[1765] | 877 | #if ENABLE_FEATURE_MINIX2
|
---|
| 878 | static void add_zone_ind2(uint32_t *znr, smallint *corrected)
|
---|
[821] | 879 | {
|
---|
[1765] | 880 | int i;
|
---|
[821] | 881 | int block;
|
---|
[1765] | 882 | smallint chg_blk = 0;
|
---|
[821] | 883 |
|
---|
| 884 | block = add_zone2(znr, corrected);
|
---|
| 885 | if (!block)
|
---|
| 886 | return;
|
---|
[1765] | 887 | read_block(block, add_zone_ind_blk);
|
---|
[821] | 888 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
[1765] | 889 | add_zone2(i + (uint32_t *) add_zone_ind_blk, &chg_blk);
|
---|
[821] | 890 | if (chg_blk)
|
---|
[1765] | 891 | write_block(block, add_zone_ind_blk);
|
---|
[821] | 892 | }
|
---|
| 893 | #endif
|
---|
| 894 |
|
---|
[1765] | 895 | static void add_zone_dind(uint16_t *znr, smallint *corrected)
|
---|
[821] | 896 | {
|
---|
[1765] | 897 | int i;
|
---|
[821] | 898 | int block;
|
---|
[1765] | 899 | smallint chg_blk = 0;
|
---|
[821] | 900 |
|
---|
| 901 | block = add_zone(znr, corrected);
|
---|
| 902 | if (!block)
|
---|
| 903 | return;
|
---|
[1765] | 904 | read_block(block, add_zone_dind_blk);
|
---|
[821] | 905 | for (i = 0; i < (BLOCK_SIZE >> 1); i++)
|
---|
[1765] | 906 | add_zone_ind(i + (uint16_t *) add_zone_dind_blk, &chg_blk);
|
---|
| 907 | if (chg_blk)
|
---|
| 908 | write_block(block, add_zone_dind_blk);
|
---|
[821] | 909 | }
|
---|
| 910 |
|
---|
[1765] | 911 | #if ENABLE_FEATURE_MINIX2
|
---|
| 912 | static void add_zone_dind2(uint32_t *znr, smallint *corrected)
|
---|
[821] | 913 | {
|
---|
[1765] | 914 | int i;
|
---|
[821] | 915 | int block;
|
---|
[1765] | 916 | smallint chg_blk = 0;
|
---|
[821] | 917 |
|
---|
| 918 | block = add_zone2(znr, corrected);
|
---|
| 919 | if (!block)
|
---|
| 920 | return;
|
---|
[1765] | 921 | read_block(block, add_zone_dind_blk);
|
---|
[821] | 922 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
[1765] | 923 | add_zone_ind2(i + (uint32_t *) add_zone_dind_blk, &chg_blk);
|
---|
| 924 | if (chg_blk)
|
---|
| 925 | write_block(block, add_zone_dind_blk);
|
---|
[821] | 926 | }
|
---|
| 927 |
|
---|
[1765] | 928 | static void add_zone_tind2(uint32_t *znr, smallint *corrected)
|
---|
[821] | 929 | {
|
---|
[1765] | 930 | int i;
|
---|
[821] | 931 | int block;
|
---|
[1765] | 932 | smallint chg_blk = 0;
|
---|
[821] | 933 |
|
---|
| 934 | block = add_zone2(znr, corrected);
|
---|
| 935 | if (!block)
|
---|
| 936 | return;
|
---|
[1765] | 937 | read_block(block, add_zone_tind_blk);
|
---|
[821] | 938 | for (i = 0; i < BLOCK_SIZE >> 2; i++)
|
---|
[1765] | 939 | add_zone_dind2(i + (uint32_t *) add_zone_tind_blk, &chg_blk);
|
---|
| 940 | if (chg_blk)
|
---|
| 941 | write_block(block, add_zone_tind_blk);
|
---|
[821] | 942 | }
|
---|
| 943 | #endif
|
---|
| 944 |
|
---|
[1765] | 945 | static void check_zones(unsigned i)
|
---|
[821] | 946 | {
|
---|
[1765] | 947 | struct minix1_inode *inode;
|
---|
[821] | 948 |
|
---|
| 949 | if (!i || i > INODES)
|
---|
| 950 | return;
|
---|
| 951 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
| 952 | return;
|
---|
[1765] | 953 | inode = Inode1 + i;
|
---|
[821] | 954 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
|
---|
| 955 | !S_ISLNK(inode->i_mode)) return;
|
---|
| 956 | for (i = 0; i < 7; i++)
|
---|
| 957 | add_zone(i + inode->i_zone, &changed);
|
---|
| 958 | add_zone_ind(7 + inode->i_zone, &changed);
|
---|
| 959 | add_zone_dind(8 + inode->i_zone, &changed);
|
---|
| 960 | }
|
---|
| 961 |
|
---|
[1765] | 962 | #if ENABLE_FEATURE_MINIX2
|
---|
| 963 | static void check_zones2(unsigned i)
|
---|
[821] | 964 | {
|
---|
| 965 | struct minix2_inode *inode;
|
---|
| 966 |
|
---|
| 967 | if (!i || i > INODES)
|
---|
| 968 | return;
|
---|
| 969 | if (inode_count[i] > 1) /* have we counted this file already? */
|
---|
| 970 | return;
|
---|
| 971 | inode = Inode2 + i;
|
---|
| 972 | if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode)
|
---|
| 973 | && !S_ISLNK(inode->i_mode))
|
---|
| 974 | return;
|
---|
| 975 | for (i = 0; i < 7; i++)
|
---|
| 976 | add_zone2(i + inode->i_zone, &changed);
|
---|
| 977 | add_zone_ind2(7 + inode->i_zone, &changed);
|
---|
| 978 | add_zone_dind2(8 + inode->i_zone, &changed);
|
---|
| 979 | add_zone_tind2(9 + inode->i_zone, &changed);
|
---|
| 980 | }
|
---|
| 981 | #endif
|
---|
| 982 |
|
---|
[1765] | 983 | static void check_file(struct minix1_inode *dir, unsigned offset)
|
---|
[821] | 984 | {
|
---|
[1765] | 985 | struct minix1_inode *inode;
|
---|
[821] | 986 | int ino;
|
---|
| 987 | char *name;
|
---|
| 988 | int block;
|
---|
| 989 |
|
---|
| 990 | block = map_block(dir, offset / BLOCK_SIZE);
|
---|
[1765] | 991 | read_block(block, check_file_blk);
|
---|
| 992 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
[821] | 993 | ino = *(uint16_t *) (name - 2);
|
---|
| 994 | if (ino > INODES) {
|
---|
| 995 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
| 996 | current_name, namelen, name);
|
---|
| 997 | if (ask("Remove", 1)) {
|
---|
| 998 | *(uint16_t *) (name - 2) = 0;
|
---|
[1765] | 999 | write_block(block, check_file_blk);
|
---|
[821] | 1000 | }
|
---|
| 1001 | ino = 0;
|
---|
| 1002 | }
|
---|
| 1003 | push_filename(name);
|
---|
| 1004 | inode = get_inode(ino);
|
---|
| 1005 | pop_filename();
|
---|
| 1006 | if (!offset) {
|
---|
[1765] | 1007 | if (inode && LONE_CHAR(name, '.'))
|
---|
[821] | 1008 | return;
|
---|
[1765] | 1009 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
| 1010 | errors_uncorrected = 1;
|
---|
[821] | 1011 | }
|
---|
| 1012 | if (offset == dirsize) {
|
---|
[1765] | 1013 | if (inode && strcmp("..", name) == 0)
|
---|
[821] | 1014 | return;
|
---|
[1765] | 1015 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
| 1016 | errors_uncorrected = 1;
|
---|
[821] | 1017 | }
|
---|
| 1018 | if (!inode)
|
---|
| 1019 | return;
|
---|
| 1020 | push_filename(name);
|
---|
| 1021 | if (list) {
|
---|
| 1022 | if (verbose)
|
---|
| 1023 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
| 1024 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
| 1025 | }
|
---|
| 1026 | check_zones(ino);
|
---|
| 1027 | if (inode && S_ISDIR(inode->i_mode))
|
---|
| 1028 | recursive_check(ino);
|
---|
| 1029 | pop_filename();
|
---|
| 1030 | }
|
---|
| 1031 |
|
---|
[1765] | 1032 | #if ENABLE_FEATURE_MINIX2
|
---|
| 1033 | static void check_file2(struct minix2_inode *dir, unsigned offset)
|
---|
[821] | 1034 | {
|
---|
| 1035 | struct minix2_inode *inode;
|
---|
| 1036 | int ino;
|
---|
| 1037 | char *name;
|
---|
| 1038 | int block;
|
---|
| 1039 |
|
---|
| 1040 | block = map_block2(dir, offset / BLOCK_SIZE);
|
---|
[1765] | 1041 | read_block(block, check_file_blk);
|
---|
| 1042 | name = check_file_blk + (offset % BLOCK_SIZE) + 2;
|
---|
[821] | 1043 | ino = *(uint16_t *) (name - 2);
|
---|
| 1044 | if (ino > INODES) {
|
---|
| 1045 | printf("%s contains a bad inode number for file '%.*s'. ",
|
---|
| 1046 | current_name, namelen, name);
|
---|
| 1047 | if (ask("Remove", 1)) {
|
---|
| 1048 | *(uint16_t *) (name - 2) = 0;
|
---|
[1765] | 1049 | write_block(block, check_file_blk);
|
---|
[821] | 1050 | }
|
---|
| 1051 | ino = 0;
|
---|
| 1052 | }
|
---|
| 1053 | push_filename(name);
|
---|
| 1054 | inode = get_inode2(ino);
|
---|
| 1055 | pop_filename();
|
---|
| 1056 | if (!offset) {
|
---|
[1765] | 1057 | if (inode && LONE_CHAR(name, '.'))
|
---|
[821] | 1058 | return;
|
---|
[1765] | 1059 | printf("%s: bad directory: '.' isn't first\n", current_name);
|
---|
| 1060 | errors_uncorrected = 1;
|
---|
[821] | 1061 | }
|
---|
| 1062 | if (offset == dirsize) {
|
---|
[1765] | 1063 | if (inode && strcmp("..", name) == 0)
|
---|
[821] | 1064 | return;
|
---|
[1765] | 1065 | printf("%s: bad directory: '..' isn't second\n", current_name);
|
---|
| 1066 | errors_uncorrected = 1;
|
---|
[821] | 1067 | }
|
---|
| 1068 | if (!inode)
|
---|
| 1069 | return;
|
---|
| 1070 | push_filename(name);
|
---|
| 1071 | if (list) {
|
---|
| 1072 | if (verbose)
|
---|
| 1073 | printf("%6d %07o %3d ", ino, inode->i_mode, inode->i_nlinks);
|
---|
| 1074 | printf("%s%s\n", current_name, S_ISDIR(inode->i_mode) ? ":" : "");
|
---|
| 1075 | }
|
---|
| 1076 | check_zones2(ino);
|
---|
| 1077 | if (inode && S_ISDIR(inode->i_mode))
|
---|
| 1078 | recursive_check2(ino);
|
---|
| 1079 | pop_filename();
|
---|
| 1080 | }
|
---|
| 1081 | #endif
|
---|
| 1082 |
|
---|
[1765] | 1083 | static void recursive_check(unsigned ino)
|
---|
[821] | 1084 | {
|
---|
[1765] | 1085 | struct minix1_inode *dir;
|
---|
| 1086 | unsigned offset;
|
---|
[821] | 1087 |
|
---|
[1765] | 1088 | dir = Inode1 + ino;
|
---|
[821] | 1089 | if (!S_ISDIR(dir->i_mode))
|
---|
[1765] | 1090 | die("internal error");
|
---|
[821] | 1091 | if (dir->i_size < 2 * dirsize) {
|
---|
| 1092 | printf("%s: bad directory: size<32", current_name);
|
---|
| 1093 | errors_uncorrected = 1;
|
---|
| 1094 | }
|
---|
| 1095 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
| 1096 | check_file(dir, offset);
|
---|
| 1097 | }
|
---|
| 1098 |
|
---|
[1765] | 1099 | #if ENABLE_FEATURE_MINIX2
|
---|
| 1100 | static void recursive_check2(unsigned ino)
|
---|
[821] | 1101 | {
|
---|
| 1102 | struct minix2_inode *dir;
|
---|
[1765] | 1103 | unsigned offset;
|
---|
[821] | 1104 |
|
---|
| 1105 | dir = Inode2 + ino;
|
---|
| 1106 | if (!S_ISDIR(dir->i_mode))
|
---|
[1765] | 1107 | die("internal error");
|
---|
[821] | 1108 | if (dir->i_size < 2 * dirsize) {
|
---|
| 1109 | printf("%s: bad directory: size<32", current_name);
|
---|
| 1110 | errors_uncorrected = 1;
|
---|
| 1111 | }
|
---|
| 1112 | for (offset = 0; offset < dir->i_size; offset += dirsize)
|
---|
| 1113 | check_file2(dir, offset);
|
---|
| 1114 | }
|
---|
| 1115 | #endif
|
---|
| 1116 |
|
---|
| 1117 | static int bad_zone(int i)
|
---|
| 1118 | {
|
---|
[1765] | 1119 | char buffer[BLOCK_SIZE];
|
---|
[821] | 1120 |
|
---|
[1765] | 1121 | if (BLOCK_SIZE * i != lseek(dev_fd, BLOCK_SIZE * i, SEEK_SET))
|
---|
| 1122 | die("seek failed in bad_zone");
|
---|
| 1123 | return (BLOCK_SIZE != read(dev_fd, buffer, BLOCK_SIZE));
|
---|
[821] | 1124 | }
|
---|
| 1125 |
|
---|
| 1126 | static void check_counts(void)
|
---|
| 1127 | {
|
---|
| 1128 | int i;
|
---|
| 1129 |
|
---|
| 1130 | for (i = 1; i <= INODES; i++) {
|
---|
[1765] | 1131 | if (warn_mode && Inode1[i].i_mode && !inode_in_use(i)) {
|
---|
[821] | 1132 | printf("Inode %d has non-zero mode. ", i);
|
---|
| 1133 | if (ask("Clear", 1)) {
|
---|
[1765] | 1134 | Inode1[i].i_mode = 0;
|
---|
[821] | 1135 | changed = 1;
|
---|
| 1136 | }
|
---|
| 1137 | }
|
---|
| 1138 | if (!inode_count[i]) {
|
---|
| 1139 | if (!inode_in_use(i))
|
---|
| 1140 | continue;
|
---|
| 1141 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
| 1142 | if (ask("Clear", 1))
|
---|
| 1143 | unmark_inode(i);
|
---|
| 1144 | continue;
|
---|
| 1145 | }
|
---|
| 1146 | if (!inode_in_use(i)) {
|
---|
| 1147 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
| 1148 | if (ask("Set", 1))
|
---|
| 1149 | mark_inode(i);
|
---|
| 1150 | }
|
---|
[1765] | 1151 | if (Inode1[i].i_nlinks != inode_count[i]) {
|
---|
[821] | 1152 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
[1765] | 1153 | i, Inode1[i].i_mode, Inode1[i].i_nlinks,
|
---|
| 1154 | inode_count[i]);
|
---|
[821] | 1155 | if (ask("Set i_nlinks to count", 1)) {
|
---|
[1765] | 1156 | Inode1[i].i_nlinks = inode_count[i];
|
---|
[821] | 1157 | changed = 1;
|
---|
| 1158 | }
|
---|
| 1159 | }
|
---|
| 1160 | }
|
---|
| 1161 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
[1765] | 1162 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
[821] | 1163 | continue;
|
---|
| 1164 | if (!zone_count[i]) {
|
---|
| 1165 | if (bad_zone(i))
|
---|
| 1166 | continue;
|
---|
| 1167 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
| 1168 | if (ask("Unmark", 1))
|
---|
| 1169 | unmark_zone(i);
|
---|
| 1170 | continue;
|
---|
| 1171 | }
|
---|
| 1172 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
| 1173 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
| 1174 | }
|
---|
| 1175 | }
|
---|
| 1176 |
|
---|
[1765] | 1177 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 1178 | static void check_counts2(void)
|
---|
| 1179 | {
|
---|
| 1180 | int i;
|
---|
| 1181 |
|
---|
| 1182 | for (i = 1; i <= INODES; i++) {
|
---|
| 1183 | if (warn_mode && Inode2[i].i_mode && !inode_in_use(i)) {
|
---|
| 1184 | printf("Inode %d has non-zero mode. ", i);
|
---|
| 1185 | if (ask("Clear", 1)) {
|
---|
| 1186 | Inode2[i].i_mode = 0;
|
---|
| 1187 | changed = 1;
|
---|
| 1188 | }
|
---|
| 1189 | }
|
---|
| 1190 | if (!inode_count[i]) {
|
---|
| 1191 | if (!inode_in_use(i))
|
---|
| 1192 | continue;
|
---|
| 1193 | printf("Unused inode %d is marked as 'used' in the bitmap. ", i);
|
---|
| 1194 | if (ask("Clear", 1))
|
---|
| 1195 | unmark_inode(i);
|
---|
| 1196 | continue;
|
---|
| 1197 | }
|
---|
| 1198 | if (!inode_in_use(i)) {
|
---|
| 1199 | printf("Inode %d is used, but marked as 'unused' in the bitmap. ", i);
|
---|
| 1200 | if (ask("Set", 1))
|
---|
| 1201 | mark_inode(i);
|
---|
| 1202 | }
|
---|
| 1203 | if (Inode2[i].i_nlinks != inode_count[i]) {
|
---|
| 1204 | printf("Inode %d (mode=%07o), i_nlinks=%d, counted=%d. ",
|
---|
[1765] | 1205 | i, Inode2[i].i_mode, Inode2[i].i_nlinks,
|
---|
| 1206 | inode_count[i]);
|
---|
[821] | 1207 | if (ask("Set i_nlinks to count", 1)) {
|
---|
| 1208 | Inode2[i].i_nlinks = inode_count[i];
|
---|
| 1209 | changed = 1;
|
---|
| 1210 | }
|
---|
| 1211 | }
|
---|
| 1212 | }
|
---|
| 1213 | for (i = FIRSTZONE; i < ZONES; i++) {
|
---|
[1765] | 1214 | if ((zone_in_use(i) != 0) == zone_count[i])
|
---|
[821] | 1215 | continue;
|
---|
| 1216 | if (!zone_count[i]) {
|
---|
| 1217 | if (bad_zone(i))
|
---|
| 1218 | continue;
|
---|
| 1219 | printf("Zone %d is marked 'in use', but no file uses it. ", i);
|
---|
| 1220 | if (ask("Unmark", 1))
|
---|
| 1221 | unmark_zone(i);
|
---|
| 1222 | continue;
|
---|
| 1223 | }
|
---|
| 1224 | printf("Zone %d: %sin use, counted=%d\n",
|
---|
| 1225 | i, zone_in_use(i) ? "" : "not ", zone_count[i]);
|
---|
| 1226 | }
|
---|
| 1227 | }
|
---|
| 1228 | #endif
|
---|
| 1229 |
|
---|
| 1230 | static void check(void)
|
---|
| 1231 | {
|
---|
| 1232 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
| 1233 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
[1765] | 1234 | check_zones(MINIX_ROOT_INO);
|
---|
| 1235 | recursive_check(MINIX_ROOT_INO);
|
---|
[821] | 1236 | check_counts();
|
---|
| 1237 | }
|
---|
| 1238 |
|
---|
[1765] | 1239 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 1240 | static void check2(void)
|
---|
| 1241 | {
|
---|
| 1242 | memset(inode_count, 0, (INODES + 1) * sizeof(*inode_count));
|
---|
| 1243 | memset(zone_count, 0, ZONES * sizeof(*zone_count));
|
---|
[1765] | 1244 | check_zones2(MINIX_ROOT_INO);
|
---|
| 1245 | recursive_check2(MINIX_ROOT_INO);
|
---|
[821] | 1246 | check_counts2();
|
---|
| 1247 | }
|
---|
[1765] | 1248 | #else
|
---|
| 1249 | void check2(void);
|
---|
[821] | 1250 | #endif
|
---|
| 1251 |
|
---|
[1765] | 1252 | int fsck_minix_main(int argc, char **argv);
|
---|
[821] | 1253 | int fsck_minix_main(int argc, char **argv)
|
---|
| 1254 | {
|
---|
| 1255 | struct termios tmp;
|
---|
| 1256 | int retcode = 0;
|
---|
| 1257 |
|
---|
[1765] | 1258 | xfunc_error_retval = 8;
|
---|
[821] | 1259 |
|
---|
[1765] | 1260 | INIT_G();
|
---|
| 1261 |
|
---|
| 1262 | if (INODE_SIZE1 * MINIX1_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
| 1263 | die("bad inode size");
|
---|
| 1264 | #if ENABLE_FEATURE_MINIX2
|
---|
[821] | 1265 | if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
|
---|
[1765] | 1266 | die("bad v2 inode size");
|
---|
[821] | 1267 | #endif
|
---|
[1765] | 1268 | while (--argc != 0) {
|
---|
[821] | 1269 | argv++;
|
---|
| 1270 | if (argv[0][0] != '-') {
|
---|
| 1271 | if (device_name)
|
---|
| 1272 | bb_show_usage();
|
---|
[1765] | 1273 | device_name = argv[0];
|
---|
| 1274 | } else {
|
---|
| 1275 | while (*++argv[0]) {
|
---|
[821] | 1276 | switch (argv[0][0]) {
|
---|
| 1277 | case 'l':
|
---|
| 1278 | list = 1;
|
---|
| 1279 | break;
|
---|
| 1280 | case 'a':
|
---|
| 1281 | automatic = 1;
|
---|
| 1282 | repair = 1;
|
---|
| 1283 | break;
|
---|
| 1284 | case 'r':
|
---|
| 1285 | automatic = 0;
|
---|
| 1286 | repair = 1;
|
---|
| 1287 | break;
|
---|
| 1288 | case 'v':
|
---|
| 1289 | verbose = 1;
|
---|
| 1290 | break;
|
---|
| 1291 | case 's':
|
---|
| 1292 | show = 1;
|
---|
| 1293 | break;
|
---|
| 1294 | case 'm':
|
---|
| 1295 | warn_mode = 1;
|
---|
| 1296 | break;
|
---|
| 1297 | case 'f':
|
---|
| 1298 | force = 1;
|
---|
| 1299 | break;
|
---|
| 1300 | default:
|
---|
| 1301 | bb_show_usage();
|
---|
| 1302 | }
|
---|
[1765] | 1303 | }
|
---|
| 1304 | }
|
---|
[821] | 1305 | }
|
---|
| 1306 | if (!device_name)
|
---|
| 1307 | bb_show_usage();
|
---|
[1765] | 1308 |
|
---|
[821] | 1309 | check_mount(); /* trying to check a mounted filesystem? */
|
---|
| 1310 | if (repair && !automatic) {
|
---|
| 1311 | if (!isatty(0) || !isatty(1))
|
---|
[1765] | 1312 | die("need terminal for interactive repairs");
|
---|
[821] | 1313 | }
|
---|
[1765] | 1314 | dev_fd = xopen(device_name, repair ? O_RDWR : O_RDONLY);
|
---|
| 1315 |
|
---|
| 1316 | /*sync(); paranoia? */
|
---|
[821] | 1317 | read_superblock();
|
---|
| 1318 |
|
---|
| 1319 | /*
|
---|
| 1320 | * Determine whether or not we should continue with the checking.
|
---|
| 1321 | * This is based on the status of the filesystem valid and error
|
---|
| 1322 | * flags and whether or not the -f switch was specified on the
|
---|
| 1323 | * command line.
|
---|
| 1324 | */
|
---|
[1765] | 1325 | printf("%s: %s\n", applet_name, bb_banner);
|
---|
| 1326 |
|
---|
| 1327 | if (!(Super.s_state & MINIX_ERROR_FS)
|
---|
| 1328 | && (Super.s_state & MINIX_VALID_FS) && !force
|
---|
| 1329 | ) {
|
---|
[821] | 1330 | if (repair)
|
---|
| 1331 | printf("%s is clean, check is skipped\n", device_name);
|
---|
[1765] | 1332 | return 0;
|
---|
[821] | 1333 | } else if (force)
|
---|
| 1334 | printf("Forcing filesystem check on %s\n", device_name);
|
---|
| 1335 | else if (repair)
|
---|
| 1336 | printf("Filesystem on %s is dirty, needs checking\n",
|
---|
| 1337 | device_name);
|
---|
| 1338 |
|
---|
| 1339 | read_tables();
|
---|
| 1340 |
|
---|
| 1341 | if (repair && !automatic) {
|
---|
[1765] | 1342 | tcgetattr(0, &sv_termios);
|
---|
| 1343 | tmp = sv_termios;
|
---|
[821] | 1344 | tmp.c_lflag &= ~(ICANON | ECHO);
|
---|
| 1345 | tcsetattr(0, TCSANOW, &tmp);
|
---|
| 1346 | termios_set = 1;
|
---|
| 1347 | }
|
---|
[1765] | 1348 |
|
---|
[821] | 1349 | if (version2) {
|
---|
| 1350 | check_root2();
|
---|
| 1351 | check2();
|
---|
[1765] | 1352 | } else {
|
---|
[821] | 1353 | check_root();
|
---|
| 1354 | check();
|
---|
| 1355 | }
|
---|
[1765] | 1356 |
|
---|
[821] | 1357 | if (verbose) {
|
---|
| 1358 | int i, free_cnt;
|
---|
| 1359 |
|
---|
| 1360 | for (i = 1, free_cnt = 0; i <= INODES; i++)
|
---|
| 1361 | if (!inode_in_use(i))
|
---|
| 1362 | free_cnt++;
|
---|
[1765] | 1363 | printf("\n%6u inodes used (%u%%)\n", (INODES - free_cnt),
|
---|
[821] | 1364 | 100 * (INODES - free_cnt) / INODES);
|
---|
| 1365 | for (i = FIRSTZONE, free_cnt = 0; i < ZONES; i++)
|
---|
| 1366 | if (!zone_in_use(i))
|
---|
| 1367 | free_cnt++;
|
---|
[1765] | 1368 | printf("%6u zones used (%u%%)\n\n"
|
---|
| 1369 | "%6u regular files\n"
|
---|
| 1370 | "%6u directories\n"
|
---|
| 1371 | "%6u character device files\n"
|
---|
| 1372 | "%6u block device files\n"
|
---|
| 1373 | "%6u links\n"
|
---|
| 1374 | "%6u symbolic links\n"
|
---|
[821] | 1375 | "------\n"
|
---|
[1765] | 1376 | "%6u files\n",
|
---|
[821] | 1377 | (ZONES - free_cnt), 100 * (ZONES - free_cnt) / ZONES,
|
---|
| 1378 | regular, directory, chardev, blockdev,
|
---|
| 1379 | links - 2 * directory + 1, symlinks,
|
---|
| 1380 | total - 2 * directory + 1);
|
---|
| 1381 | }
|
---|
| 1382 | if (changed) {
|
---|
| 1383 | write_tables();
|
---|
| 1384 | printf("FILE SYSTEM HAS BEEN CHANGED\n");
|
---|
| 1385 | sync();
|
---|
| 1386 | } else if (repair)
|
---|
| 1387 | write_super_block();
|
---|
| 1388 |
|
---|
| 1389 | if (repair && !automatic)
|
---|
[1765] | 1390 | tcsetattr(0, TCSANOW, &sv_termios);
|
---|
[821] | 1391 |
|
---|
| 1392 | if (changed)
|
---|
| 1393 | retcode += 3;
|
---|
| 1394 | if (errors_uncorrected)
|
---|
| 1395 | retcode += 4;
|
---|
| 1396 | return retcode;
|
---|
| 1397 | }
|
---|